diff options
| author | Álvaro Fernández Rojas <noltari@gmail.com> | 2016-04-07 21:25:10 +0200 |
|---|---|---|
| committer | Álvaro Fernández Rojas <noltari@gmail.com> | 2016-04-07 21:25:10 +0200 |
| commit | a8d4d71c41ff0158c2026cac5981e39702167da9 (patch) | |
| tree | 0c54ec3eb59f5bab6aa7318d14c92ff875412202 /target/linux/brcm2708/patches-4.4/0036-bcm2708-vchiq-driver.patch | |
| parent | 59e0e88c22007fd77ee9c6c8e02a689889a5f597 (diff) | |
| download | upstream-a8d4d71c41ff0158c2026cac5981e39702167da9.tar.gz upstream-a8d4d71c41ff0158c2026cac5981e39702167da9.tar.bz2 upstream-a8d4d71c41ff0158c2026cac5981e39702167da9.zip | |
brcm2708: update to latest version
As usual these patches were extracted from the raspberry pi repo:
https://github.com/raspberrypi/linux/commits/rpi-4.4.y
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0036-bcm2708-vchiq-driver.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0036-bcm2708-vchiq-driver.patch | 13200 |
1 files changed, 13200 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0036-bcm2708-vchiq-driver.patch b/target/linux/brcm2708/patches-4.4/0036-bcm2708-vchiq-driver.patch new file mode 100644 index 0000000000..4ec48e2192 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0036-bcm2708-vchiq-driver.patch @@ -0,0 +1,13200 @@ +From 112360f76c91c892f1a29825eb2807bbf86ac67d Mon Sep 17 00:00:00 2001 +From: popcornmix <popcornmix@gmail.com> +Date: Tue, 2 Jul 2013 23:42:01 +0100 +Subject: [PATCH 036/232] bcm2708 vchiq driver +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Signed-off-by: popcornmix <popcornmix@gmail.com> + +vchiq: create_pagelist copes with vmalloc memory + +Signed-off-by: Daniel Stone <daniels@collabora.com> + +vchiq: fix the shim message release + +Signed-off-by: Daniel Stone <daniels@collabora.com> + +vchiq: export additional symbols + +Signed-off-by: Daniel Stone <daniels@collabora.com> + +VCHIQ: Make service closure fully synchronous (drv) + +This is one half of a two-part patch, the other half of which is to +the vchiq_lib user library. With these patches, calls to +vchiq_close_service and vchiq_remove_service won't return until any +associated callbacks have been delivered to the callback thread. + +VCHIQ: Add per-service tracing + +The new service option VCHIQ_SERVICE_OPTION_TRACE is a boolean that +toggles tracing for the specified service. + +This commit also introduces vchi_service_set_option and the associated +option VCHI_SERVICE_OPTION_TRACE. + +vchiq: Make the synchronous-CLOSE logic more tolerant + +vchiq: Move logging control into debugfs + +vchiq: Take care of a corner case tickled by VCSM + +Closing a connection that isn't fully open requires care, since one +side does not know the other side's port number. Code was present to +handle the case where a CLOSE is sent immediately after an OPEN, i.e. +before the OPENACK has been received, but this was incorrectly being +used when an OPEN from a client using port 0 was rejected. + +(In the observed failure, the host was attempting to use the VCSM +service, which isn't present in the 'cutdown' firmware. The failure +was intermittent because sometimes the keepalive service would +grab port 0.) + +This case can be distinguished because the client's remoteport will +still be VCHIQ_PORT_FREE, and the srvstate will be OPENING. Either +condition is sufficient to differentiate it from the special case +described above. + +vchiq: Avoid high load when blocked and unkillable + +vchiq: Include SIGSTOP and SIGCONT in list of signals not-masked by vchiq to allow gdb to work + +vchiq_arm: Complete support for SYNCHRONOUS mode + +vchiq: Remove inline from suspend/resume + +vchiq: Allocation does not need to be atomic + +vchiq: Fix wrong condition check + +The log level is checked from within the log call. Remove the check in the call. + +Signed-off-by: Pranith Kumar <bobby.prani@gmail.com> + +BCM270x: Add vchiq device to platform file and Device Tree + +Prepare to turn the vchiq module into a driver. + +Signed-off-by: Noralf Trønnes <noralf@tronnes.org> + +bcm2708: vchiq: Add Device Tree support + +Turn vchiq into a driver and stop hardcoding resources. +Use devm_* functions in probe path to simplify cleanup. +A global variable is used to hold the register address. This is done +to keep this patch as small as possible. +Also make available on ARCH_BCM2835. +Based on work by Lubomir Rintel. + +Signed-off-by: Noralf Trønnes <noralf@tronnes.org> + +vchiq: Change logging level for inbound data + +vchiq_arm: Two cacheing fixes + +1) Make fragment size vary with cache line size +Without this patch, non-cache-line-aligned transfers may corrupt +(or be corrupted by) adjacent data structures. + +Both ARM and VC need to be updated to enable this feature. This is +ensured by having the loader apply a new DT parameter - +cache-line-size. The existence of this parameter guarantees that the +kernel is capable, and the parameter will only be modified from the +safe default if the loader is capable. + +2) Flush/invalidate vmalloc'd memory, and invalidate after reads + +vchiq: fix NULL pointer dereference when closing driver + +The following code run as root will cause a null pointer dereference oops: + + int fd = open("/dev/vc-cma", O_RDONLY); + if (fd < 0) + err(1, "open failed"); + (void)close(fd); + +[ 1704.877721] Unable to handle kernel NULL pointer dereference at virtual address 00000000 +[ 1704.877725] pgd = b899c000 +[ 1704.877736] [00000000] *pgd=37fab831, *pte=00000000, *ppte=00000000 +[ 1704.877748] Internal error: Oops: 817 [#1] PREEMPT SMP ARM +[ 1704.877765] Modules linked in: evdev i2c_bcm2708 uio_pdrv_genirq uio +[ 1704.877774] CPU: 2 PID: 3656 Comm: stress-ng-fstat Not tainted 3.19.1-12-generic-bcm2709 #12-Ubuntu +[ 1704.877777] Hardware name: BCM2709 +[ 1704.877783] task: b8ab9b00 ti: b7e68000 task.ti: b7e68000 +[ 1704.877798] PC is at __down_interruptible+0x50/0xec +[ 1704.877806] LR is at down_interruptible+0x5c/0x68 +[ 1704.877813] pc : [<80630ee8>] lr : [<800704b0>] psr: 60080093 +sp : b7e69e50 ip : b7e69e88 fp : b7e69e84 +[ 1704.877817] r10: b88123c8 r9 : 00000010 r8 : 00000001 +[ 1704.877822] r7 : b8ab9b00 r6 : 7fffffff r5 : 80a1cc34 r4 : 80a1cc34 +[ 1704.877826] r3 : b7e69e50 r2 : 00000000 r1 : 00000000 r0 : 80a1cc34 +[ 1704.877833] Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment user +[ 1704.877838] Control: 10c5387d Table: 3899c06a DAC: 00000015 +[ 1704.877843] Process do-oops (pid: 3656, stack limit = 0xb7e68238) +[ 1704.877848] Stack: (0xb7e69e50 to 0xb7e6a000) +[ 1704.877856] 9e40: 80a1cc3c 00000000 00000010 b88123c8 +[ 1704.877865] 9e60: b7e69e84 80a1cc34 fff9fee9 ffffffff b7e68000 00000009 b7e69ea4 b7e69e88 +[ 1704.877874] 9e80: 800704b0 80630ea4 fff9fee9 60080013 80a1cc28 fff9fee9 b7e69edc b7e69ea8 +[ 1704.877884] 9ea0: 8040f558 80070460 fff9fee9 ffffffff 00000000 00000000 00000009 80a1cb7c +[ 1704.877893] 9ec0: 00000000 80a1cb7c 00000000 00000010 b7e69ef4 b7e69ee0 803e1ba4 8040f514 +[ 1704.877902] 9ee0: 00000e48 80a1cb7c b7e69f14 b7e69ef8 803e1c9c 803e1b74 b88123c0 b92acb18 +[ 1704.877911] 9f00: b8812790 b8d815d8 b7e69f24 b7e69f18 803e2250 803e1bc8 b7e69f5c b7e69f28 +[ 1704.877921] 9f20: 80167bac 803e222c 00000000 00000000 b7e69f54 b8ab9ffc 00000000 8098c794 +[ 1704.877930] 9f40: b8ab9b00 8000efc4 b7e68000 00000000 b7e69f6c b7e69f60 80167d6c 80167b28 +[ 1704.877939] 9f60: b7e69f8c b7e69f70 80047d38 80167d60 b7e68000 b7e68010 8000efc4 b7e69fb0 +[ 1704.877949] 9f80: b7e69fac b7e69f90 80012820 80047c84 01155490 011549a8 00000001 00000006 +[ 1704.877957] 9fa0: 00000000 b7e69fb0 8000ee5c 80012790 00000000 353d8c0f 7efc4308 00000000 +[ 1704.877966] 9fc0: 01155490 011549a8 00000001 00000006 00000000 00000000 76cf3ba0 00000003 +[ 1704.877975] 9fe0: 00000000 7efc42e4 0002272f 76e2ed66 60080030 00000003 00000000 00000000 +[ 1704.877998] [<80630ee8>] (__down_interruptible) from [<800704b0>] (down_interruptible+0x5c/0x68) +[ 1704.878015] [<800704b0>] (down_interruptible) from [<8040f558>] (vchiu_queue_push+0x50/0xd8) +[ 1704.878032] [<8040f558>] (vchiu_queue_push) from [<803e1ba4>] (send_worker_msg+0x3c/0x54) +[ 1704.878045] [<803e1ba4>] (send_worker_msg) from [<803e1c9c>] (vc_cma_set_reserve+0xe0/0x1c4) +[ 1704.878057] [<803e1c9c>] (vc_cma_set_reserve) from [<803e2250>] (vc_cma_release+0x30/0x38) +[ 1704.878069] [<803e2250>] (vc_cma_release) from [<80167bac>] (__fput+0x90/0x1e0) +[ 1704.878082] [<80167bac>] (__fput) from [<80167d6c>] (____fput+0x18/0x1c) +[ 1704.878094] [<80167d6c>] (____fput) from [<80047d38>] (task_work_run+0xc0/0xf8) +[ 1704.878109] [<80047d38>] (task_work_run) from [<80012820>] (do_work_pending+0x9c/0xc4) +[ 1704.878123] [<80012820>] (do_work_pending) from [<8000ee5c>] (work_pending+0xc/0x20) +[ 1704.878133] Code: e50b1034 e3a01000 e50b2030 e580300c (e5823000) + +..the fix is to ensure that we have actually initialized the queue before we attempt +to push any items onto it. This occurs if we do an open() followed by a close() without +any activity in between. + +Signed-off-by: Colin Ian King <colin.king@canonical.com> + +vchiq_arm: Sort out the vmalloc case + +See: https://github.com/raspberrypi/linux/issues/1055 + +vchiq: hack: Add include depecated dma include file +--- + arch/arm/mach-bcm2708/include/mach/platform.h | 2 + + arch/arm/mach-bcm2709/include/mach/platform.h | 2 + + drivers/misc/Kconfig | 1 + + drivers/misc/Makefile | 1 + + drivers/misc/vc04_services/Kconfig | 9 + + drivers/misc/vc04_services/Makefile | 14 + + .../interface/vchi/connections/connection.h | 328 ++ + .../interface/vchi/message_drivers/message.h | 204 + + drivers/misc/vc04_services/interface/vchi/vchi.h | 378 ++ + .../misc/vc04_services/interface/vchi/vchi_cfg.h | 224 ++ + .../interface/vchi/vchi_cfg_internal.h | 71 + + .../vc04_services/interface/vchi/vchi_common.h | 175 + + .../misc/vc04_services/interface/vchi/vchi_mh.h | 42 + + .../misc/vc04_services/interface/vchiq_arm/vchiq.h | 40 + + .../vc04_services/interface/vchiq_arm/vchiq_2835.h | 42 + + .../interface/vchiq_arm/vchiq_2835_arm.c | 586 +++ + .../vc04_services/interface/vchiq_arm/vchiq_arm.c | 2903 +++++++++++++++ + .../vc04_services/interface/vchiq_arm/vchiq_arm.h | 220 ++ + .../interface/vchiq_arm/vchiq_build_info.h | 37 + + .../vc04_services/interface/vchiq_arm/vchiq_cfg.h | 69 + + .../interface/vchiq_arm/vchiq_connected.c | 120 + + .../interface/vchiq_arm/vchiq_connected.h | 50 + + .../vc04_services/interface/vchiq_arm/vchiq_core.c | 3934 ++++++++++++++++++++ + .../vc04_services/interface/vchiq_arm/vchiq_core.h | 712 ++++ + .../interface/vchiq_arm/vchiq_debugfs.c | 383 ++ + .../interface/vchiq_arm/vchiq_debugfs.h | 52 + + .../interface/vchiq_arm/vchiq_genversion | 87 + + .../vc04_services/interface/vchiq_arm/vchiq_if.h | 189 + + .../interface/vchiq_arm/vchiq_ioctl.h | 131 + + .../interface/vchiq_arm/vchiq_kern_lib.c | 458 +++ + .../interface/vchiq_arm/vchiq_killable.h | 69 + + .../interface/vchiq_arm/vchiq_memdrv.h | 71 + + .../interface/vchiq_arm/vchiq_pagelist.h | 58 + + .../vc04_services/interface/vchiq_arm/vchiq_shim.c | 860 +++++ + .../vc04_services/interface/vchiq_arm/vchiq_util.c | 156 + + .../vc04_services/interface/vchiq_arm/vchiq_util.h | 82 + + .../interface/vchiq_arm/vchiq_version.c | 59 + + 37 files changed, 12819 insertions(+) + create mode 100644 drivers/misc/vc04_services/Kconfig + create mode 100644 drivers/misc/vc04_services/Makefile + create mode 100644 drivers/misc/vc04_services/interface/vchi/connections/connection.h + create mode 100644 drivers/misc/vc04_services/interface/vchi/message_drivers/message.h + create mode 100644 drivers/misc/vc04_services/interface/vchi/vchi.h + create mode 100644 drivers/misc/vc04_services/interface/vchi/vchi_cfg.h + create mode 100644 drivers/misc/vc04_services/interface/vchi/vchi_cfg_internal.h + create mode 100644 drivers/misc/vc04_services/interface/vchi/vchi_common.h + create mode 100644 drivers/misc/vc04_services/interface/vchi/vchi_mh.h + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq.h + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_2835.h + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_arm.c + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_arm.h + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_build_info.h + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_cfg.h + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_connected.c + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_connected.h + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_core.c + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_core.h + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_debugfs.c + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_debugfs.h + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_genversion + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_if.h + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_ioctl.h + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_kern_lib.c + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_killable.h + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_memdrv.h + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_pagelist.h + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_shim.c + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_util.c + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_util.h + create mode 100644 drivers/misc/vc04_services/interface/vchiq_arm/vchiq_version.c + +--- a/arch/arm/mach-bcm2708/include/mach/platform.h ++++ b/arch/arm/mach-bcm2708/include/mach/platform.h +@@ -78,6 +78,8 @@ + #define ARMCTRL_IC_BASE (ARM_BASE + 0x200) /* ARM interrupt controller */ + #define ARMCTRL_TIMER0_1_BASE (ARM_BASE + 0x400) /* Timer 0 and 1 */ + #define ARMCTRL_0_SBM_BASE (ARM_BASE + 0x800) /* User 0 (ARM)'s Semaphores Doorbells and Mailboxes */ ++#define ARMCTRL_0_BELL_BASE (ARMCTRL_0_SBM_BASE + 0x40) /* User 0 (ARM)'s Doorbell */ ++#define ARMCTRL_0_MAIL0_BASE (ARMCTRL_0_SBM_BASE + 0x80) /* User 0 (ARM)'s Mailbox 0 */ + + /* + * Watchdog +--- a/arch/arm/mach-bcm2709/include/mach/platform.h ++++ b/arch/arm/mach-bcm2709/include/mach/platform.h +@@ -78,6 +78,8 @@ + #define ARMCTRL_IC_BASE (ARM_BASE + 0x200) /* ARM interrupt controller */ + #define ARMCTRL_TIMER0_1_BASE (ARM_BASE + 0x400) /* Timer 0 and 1 */ + #define ARMCTRL_0_SBM_BASE (ARM_BASE + 0x800) /* User 0 (ARM)'s Semaphores Doorbells and Mailboxes */ ++#define ARMCTRL_0_BELL_BASE (ARMCTRL_0_SBM_BASE + 0x40) /* User 0 (ARM)'s Doorbell */ ++#define ARMCTRL_0_MAIL0_BASE (ARMCTRL_0_SBM_BASE + 0x80) /* User 0 (ARM)'s Mailbox 0 */ + + /* + * Watchdog +--- a/drivers/misc/Kconfig ++++ b/drivers/misc/Kconfig +@@ -533,6 +533,7 @@ source "drivers/misc/lis3lv02d/Kconfig" + source "drivers/misc/altera-stapl/Kconfig" + source "drivers/misc/mei/Kconfig" + source "drivers/misc/vmw_vmci/Kconfig" ++source "drivers/misc/vc04_services/Kconfig" + source "drivers/misc/mic/Kconfig" + source "drivers/misc/genwqe/Kconfig" + source "drivers/misc/echo/Kconfig" +--- a/drivers/misc/Makefile ++++ b/drivers/misc/Makefile +@@ -51,6 +51,7 @@ obj-$(CONFIG_INTEL_MEI) += mei/ + obj-$(CONFIG_VMWARE_VMCI) += vmw_vmci/ + obj-$(CONFIG_LATTICE_ECP3_CONFIG) += lattice-ecp3-config.o + obj-$(CONFIG_SRAM) += sram.o ++obj-$(CONFIG_BCM2708_VCHIQ) += vc04_services/ + obj-y += mic/ + obj-$(CONFIG_GENWQE) += genwqe/ + obj-$(CONFIG_ECHO) += echo/ +--- /dev/null ++++ b/drivers/misc/vc04_services/Kconfig +@@ -0,0 +1,9 @@ ++config BCM2708_VCHIQ ++ tristate "Videocore VCHIQ" ++ depends on RASPBERRYPI_FIRMWARE ++ default y ++ help ++ Kernel to VideoCore communication interface for the ++ BCM2708 family of products. ++ Defaults to Y when the Broadcom Videocore services ++ are included in the build, N otherwise. +--- /dev/null ++++ b/drivers/misc/vc04_services/Makefile +@@ -0,0 +1,14 @@ ++obj-$(CONFIG_BCM2708_VCHIQ) += vchiq.o ++ ++vchiq-objs := \ ++ interface/vchiq_arm/vchiq_core.o \ ++ interface/vchiq_arm/vchiq_arm.o \ ++ interface/vchiq_arm/vchiq_kern_lib.o \ ++ interface/vchiq_arm/vchiq_2835_arm.o \ ++ interface/vchiq_arm/vchiq_debugfs.o \ ++ interface/vchiq_arm/vchiq_shim.o \ ++ interface/vchiq_arm/vchiq_util.o \ ++ interface/vchiq_arm/vchiq_connected.o \ ++ ++ccflags-y += -DVCOS_VERIFY_BKPTS=1 -Idrivers/misc/vc04_services -DUSE_VCHIQ_ARM -D__VCCOREVER__=0x04000000 ++ +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchi/connections/connection.h +@@ -0,0 +1,328 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#ifndef CONNECTION_H_ ++#define CONNECTION_H_ ++ ++#include <linux/kernel.h> ++#include <linux/types.h> ++#include <linux/semaphore.h> ++ ++#include "interface/vchi/vchi_cfg_internal.h" ++#include "interface/vchi/vchi_common.h" ++#include "interface/vchi/message_drivers/message.h" ++ ++/****************************************************************************** ++ Global defs ++ *****************************************************************************/ ++ ++// Opaque handle for a connection / service pair ++typedef struct opaque_vchi_connection_connected_service_handle_t *VCHI_CONNECTION_SERVICE_HANDLE_T; ++ ++// opaque handle to the connection state information ++typedef struct opaque_vchi_connection_info_t VCHI_CONNECTION_STATE_T; ++ ++typedef struct vchi_connection_t VCHI_CONNECTION_T; ++ ++ ++/****************************************************************************** ++ API ++ *****************************************************************************/ ++ ++// Routine to init a connection with a particular low level driver ++typedef VCHI_CONNECTION_STATE_T * (*VCHI_CONNECTION_INIT_T)( struct vchi_connection_t * connection, ++ const VCHI_MESSAGE_DRIVER_T * driver ); ++ ++// Routine to control CRC enabling at a connection level ++typedef int32_t (*VCHI_CONNECTION_CRC_CONTROL_T)( VCHI_CONNECTION_STATE_T *state_handle, ++ VCHI_CRC_CONTROL_T control ); ++ ++// Routine to create a service ++typedef int32_t (*VCHI_CONNECTION_SERVICE_CONNECT_T)( VCHI_CONNECTION_STATE_T *state_handle, ++ int32_t service_id, ++ uint32_t rx_fifo_size, ++ uint32_t tx_fifo_size, ++ int server, ++ VCHI_CALLBACK_T callback, ++ void *callback_param, ++ int32_t want_crc, ++ int32_t want_unaligned_bulk_rx, ++ int32_t want_unaligned_bulk_tx, ++ VCHI_CONNECTION_SERVICE_HANDLE_T *service_handle ); ++ ++// Routine to close a service ++typedef int32_t (*VCHI_CONNECTION_SERVICE_DISCONNECT_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle ); ++ ++// Routine to queue a message ++typedef int32_t (*VCHI_CONNECTION_SERVICE_QUEUE_MESSAGE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, ++ const void *data, ++ uint32_t data_size, ++ VCHI_FLAGS_T flags, ++ void *msg_handle ); ++ ++// scatter-gather (vector) message queueing ++typedef int32_t (*VCHI_CONNECTION_SERVICE_QUEUE_MESSAGEV_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, ++ VCHI_MSG_VECTOR_T *vector, ++ uint32_t count, ++ VCHI_FLAGS_T flags, ++ void *msg_handle ); ++ ++// Routine to dequeue a message ++typedef int32_t (*VCHI_CONNECTION_SERVICE_DEQUEUE_MESSAGE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, ++ void *data, ++ uint32_t max_data_size_to_read, ++ uint32_t *actual_msg_size, ++ VCHI_FLAGS_T flags ); ++ ++// Routine to peek at a message ++typedef int32_t (*VCHI_CONNECTION_SERVICE_PEEK_MESSAGE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, ++ void **data, ++ uint32_t *msg_size, ++ VCHI_FLAGS_T flags ); ++ ++// Routine to hold a message ++typedef int32_t (*VCHI_CONNECTION_SERVICE_HOLD_MESSAGE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, ++ void **data, ++ uint32_t *msg_size, ++ VCHI_FLAGS_T flags, ++ void **message_handle ); ++ ++// Routine to initialise a received message iterator ++typedef int32_t (*VCHI_CONNECTION_SERVICE_LOOKAHEAD_MESSAGE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, ++ VCHI_MSG_ITER_T *iter, ++ VCHI_FLAGS_T flags ); ++ ++// Routine to release a held message ++typedef int32_t (*VCHI_CONNECTION_HELD_MSG_RELEASE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, ++ void *message_handle ); ++ ++// Routine to get info on a held message ++typedef int32_t (*VCHI_CONNECTION_HELD_MSG_INFO_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, ++ void *message_handle, ++ void **data, ++ int32_t *msg_size, ++ uint32_t *tx_timestamp, ++ uint32_t *rx_timestamp ); ++ ++// Routine to check whether the iterator has a next message ++typedef int32_t (*VCHI_CONNECTION_MSG_ITER_HAS_NEXT_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service, ++ const VCHI_MSG_ITER_T *iter ); ++ ++// Routine to advance the iterator ++typedef int32_t (*VCHI_CONNECTION_MSG_ITER_NEXT_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service, ++ VCHI_MSG_ITER_T *iter, ++ void **data, ++ uint32_t *msg_size ); ++ ++// Routine to remove the last message returned by the iterator ++typedef int32_t (*VCHI_CONNECTION_MSG_ITER_REMOVE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service, ++ VCHI_MSG_ITER_T *iter ); ++ ++// Routine to hold the last message returned by the iterator ++typedef int32_t (*VCHI_CONNECTION_MSG_ITER_HOLD_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service, ++ VCHI_MSG_ITER_T *iter, ++ void **msg_handle ); ++ ++// Routine to transmit bulk data ++typedef int32_t (*VCHI_CONNECTION_BULK_QUEUE_TRANSMIT_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, ++ const void *data_src, ++ uint32_t data_size, ++ VCHI_FLAGS_T flags, ++ void *bulk_handle ); ++ ++// Routine to receive data ++typedef int32_t (*VCHI_CONNECTION_BULK_QUEUE_RECEIVE_T)( VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, ++ void *data_dst, ++ uint32_t data_size, ++ VCHI_FLAGS_T flags, ++ void *bulk_handle ); ++ ++// Routine to report if a server is available ++typedef int32_t (*VCHI_CONNECTION_SERVER_PRESENT)( VCHI_CONNECTION_STATE_T *state, int32_t service_id, int32_t peer_flags ); ++ ++// Routine to report the number of RX slots available ++typedef int (*VCHI_CONNECTION_RX_SLOTS_AVAILABLE)( const VCHI_CONNECTION_STATE_T *state ); ++ ++// Routine to report the RX slot size ++typedef uint32_t (*VCHI_CONNECTION_RX_SLOT_SIZE)( const VCHI_CONNECTION_STATE_T *state ); ++ ++// Callback to indicate that the other side has added a buffer to the rx bulk DMA FIFO ++typedef void (*VCHI_CONNECTION_RX_BULK_BUFFER_ADDED)(VCHI_CONNECTION_STATE_T *state, ++ int32_t service, ++ uint32_t length, ++ MESSAGE_TX_CHANNEL_T channel, ++ uint32_t channel_params, ++ uint32_t data_length, ++ uint32_t data_offset); ++ ++// Callback to inform a service that a Xon or Xoff message has been received ++typedef void (*VCHI_CONNECTION_FLOW_CONTROL)(VCHI_CONNECTION_STATE_T *state, int32_t service_id, int32_t xoff); ++ ++// Callback to inform a service that a server available reply message has been received ++typedef void (*VCHI_CONNECTION_SERVER_AVAILABLE_REPLY)(VCHI_CONNECTION_STATE_T *state, int32_t service_id, uint32_t flags); ++ ++// Callback to indicate that bulk auxiliary messages have arrived ++typedef void (*VCHI_CONNECTION_BULK_AUX_RECEIVED)(VCHI_CONNECTION_STATE_T *state); ++ ++// Callback to indicate that bulk auxiliary messages have arrived ++typedef void (*VCHI_CONNECTION_BULK_AUX_TRANSMITTED)(VCHI_CONNECTION_STATE_T *state, void *handle); ++ ++// Callback with all the connection info you require ++typedef void (*VCHI_CONNECTION_INFO)(VCHI_CONNECTION_STATE_T *state, uint32_t protocol_version, uint32_t slot_size, uint32_t num_slots, uint32_t min_bulk_size); ++ ++// Callback to inform of a disconnect ++typedef void (*VCHI_CONNECTION_DISCONNECT)(VCHI_CONNECTION_STATE_T *state, uint32_t flags); ++ ++// Callback to inform of a power control request ++typedef void (*VCHI_CONNECTION_POWER_CONTROL)(VCHI_CONNECTION_STATE_T *state, MESSAGE_TX_CHANNEL_T channel, int32_t enable); ++ ++// allocate memory suitably aligned for this connection ++typedef void * (*VCHI_BUFFER_ALLOCATE)(VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, uint32_t * length); ++ ++// free memory allocated by buffer_allocate ++typedef void (*VCHI_BUFFER_FREE)(VCHI_CONNECTION_SERVICE_HANDLE_T service_handle, void * address); ++ ++ ++/****************************************************************************** ++ System driver struct ++ *****************************************************************************/ ++ ++struct opaque_vchi_connection_api_t ++{ ++ // Routine to init the connection ++ VCHI_CONNECTION_INIT_T init; ++ ++ // Connection-level CRC control ++ VCHI_CONNECTION_CRC_CONTROL_T crc_control; ++ ++ // Routine to connect to or create service ++ VCHI_CONNECTION_SERVICE_CONNECT_T service_connect; ++ ++ // Routine to disconnect from a service ++ VCHI_CONNECTION_SERVICE_DISCONNECT_T service_disconnect; ++ ++ // Routine to queue a message ++ VCHI_CONNECTION_SERVICE_QUEUE_MESSAGE_T service_queue_msg; ++ ++ // scatter-gather (vector) message queue ++ VCHI_CONNECTION_SERVICE_QUEUE_MESSAGEV_T service_queue_msgv; ++ ++ // Routine to dequeue a message ++ VCHI_CONNECTION_SERVICE_DEQUEUE_MESSAGE_T service_dequeue_msg; ++ ++ // Routine to peek at a message ++ VCHI_CONNECTION_SERVICE_PEEK_MESSAGE_T service_peek_msg; ++ ++ // Routine to hold a message ++ VCHI_CONNECTION_SERVICE_HOLD_MESSAGE_T service_hold_msg; ++ ++ // Routine to initialise a received message iterator ++ VCHI_CONNECTION_SERVICE_LOOKAHEAD_MESSAGE_T service_look_ahead_msg; ++ ++ // Routine to release a message ++ VCHI_CONNECTION_HELD_MSG_RELEASE_T held_msg_release; ++ ++ // Routine to get information on a held message ++ VCHI_CONNECTION_HELD_MSG_INFO_T held_msg_info; ++ ++ // Routine to check for next message on iterator ++ VCHI_CONNECTION_MSG_ITER_HAS_NEXT_T msg_iter_has_next; ++ ++ // Routine to get next message on iterator ++ VCHI_CONNECTION_MSG_ITER_NEXT_T msg_iter_next; ++ ++ // Routine to remove the last message returned by iterator ++ VCHI_CONNECTION_MSG_ITER_REMOVE_T msg_iter_remove; ++ ++ // Routine to hold the last message returned by iterator ++ VCHI_CONNECTION_MSG_ITER_HOLD_T msg_iter_hold; ++ ++ // Routine to transmit bulk data ++ VCHI_CONNECTION_BULK_QUEUE_TRANSMIT_T bulk_queue_transmit; ++ ++ // Routine to receive data ++ VCHI_CONNECTION_BULK_QUEUE_RECEIVE_T bulk_queue_receive; ++ ++ // Routine to report the available servers ++ VCHI_CONNECTION_SERVER_PRESENT server_present; ++ ++ // Routine to report the number of RX slots available ++ VCHI_CONNECTION_RX_SLOTS_AVAILABLE connection_rx_slots_available; ++ ++ // Routine to report the RX slot size ++ VCHI_CONNECTION_RX_SLOT_SIZE connection_rx_slot_size; ++ ++ // Callback to indicate that the other side has added a buffer to the rx bulk DMA FIFO ++ VCHI_CONNECTION_RX_BULK_BUFFER_ADDED rx_bulk_buffer_added; ++ ++ // Callback to inform a service that a Xon or Xoff message has been received ++ VCHI_CONNECTION_FLOW_CONTROL flow_control; ++ ++ // Callback to inform a service that a server available reply message has been received ++ VCHI_CONNECTION_SERVER_AVAILABLE_REPLY server_available_reply; ++ ++ // Callback to indicate that bulk auxiliary messages have arrived ++ VCHI_CONNECTION_BULK_AUX_RECEIVED bulk_aux_received; ++ ++ // Callback to indicate that a bulk auxiliary message has been transmitted ++ VCHI_CONNECTION_BULK_AUX_TRANSMITTED bulk_aux_transmitted; ++ ++ // Callback to provide information about the connection ++ VCHI_CONNECTION_INFO connection_info; ++ ++ // Callback to notify that peer has requested disconnect ++ VCHI_CONNECTION_DISCONNECT disconnect; ++ ++ // Callback to notify that peer has requested power change ++ VCHI_CONNECTION_POWER_CONTROL power_control; ++ ++ // allocate memory suitably aligned for this connection ++ VCHI_BUFFER_ALLOCATE buffer_allocate; ++ ++ // free memory allocated by buffer_allocate ++ VCHI_BUFFER_FREE buffer_free; ++ ++}; ++ ++struct vchi_connection_t { ++ const VCHI_CONNECTION_API_T *api; ++ VCHI_CONNECTION_STATE_T *state; ++#ifdef VCHI_COARSE_LOCKING ++ struct semaphore sem; ++#endif ++}; ++ ++ ++#endif /* CONNECTION_H_ */ ++ ++/****************************** End of file **********************************/ +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchi/message_drivers/message.h +@@ -0,0 +1,204 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#ifndef _VCHI_MESSAGE_H_ ++#define _VCHI_MESSAGE_H_ ++ ++#include <linux/kernel.h> ++#include <linux/types.h> ++#include <linux/semaphore.h> ++ ++#include "interface/vchi/vchi_cfg_internal.h" ++#include "interface/vchi/vchi_common.h" ++ ++ ++typedef enum message_event_type { ++ MESSAGE_EVENT_NONE, ++ MESSAGE_EVENT_NOP, ++ MESSAGE_EVENT_MESSAGE, ++ MESSAGE_EVENT_SLOT_COMPLETE, ++ MESSAGE_EVENT_RX_BULK_PAUSED, ++ MESSAGE_EVENT_RX_BULK_COMPLETE, ++ MESSAGE_EVENT_TX_COMPLETE, ++ MESSAGE_EVENT_MSG_DISCARDED ++} MESSAGE_EVENT_TYPE_T; ++ ++typedef enum vchi_msg_flags ++{ ++ VCHI_MSG_FLAGS_NONE = 0x0, ++ VCHI_MSG_FLAGS_TERMINATE_DMA = 0x1 ++} VCHI_MSG_FLAGS_T; ++ ++typedef enum message_tx_channel ++{ ++ MESSAGE_TX_CHANNEL_MESSAGE = 0, ++ MESSAGE_TX_CHANNEL_BULK = 1 // drivers may provide multiple bulk channels, from 1 upwards ++} MESSAGE_TX_CHANNEL_T; ++ ++// Macros used for cycling through bulk channels ++#define MESSAGE_TX_CHANNEL_BULK_PREV(c) (MESSAGE_TX_CHANNEL_BULK+((c)-MESSAGE_TX_CHANNEL_BULK+VCHI_MAX_BULK_TX_CHANNELS_PER_CONNECTION-1)%VCHI_MAX_BULK_TX_CHANNELS_PER_CONNECTION) ++#define MESSAGE_TX_CHANNEL_BULK_NEXT(c) (MESSAGE_TX_CHANNEL_BULK+((c)-MESSAGE_TX_CHANNEL_BULK+1)%VCHI_MAX_BULK_TX_CHANNELS_PER_CONNECTION) ++ ++typedef enum message_rx_channel ++{ ++ MESSAGE_RX_CHANNEL_MESSAGE = 0, ++ MESSAGE_RX_CHANNEL_BULK = 1 // drivers may provide multiple bulk channels, from 1 upwards ++} MESSAGE_RX_CHANNEL_T; ++ ++// Message receive slot information ++typedef struct rx_msg_slot_info { ++ ++ struct rx_msg_slot_info *next; ++ //struct slot_info *prev; ++#if !defined VCHI_COARSE_LOCKING ++ struct semaphore sem; ++#endif ++ ++ uint8_t *addr; // base address of slot ++ uint32_t len; // length of slot in bytes ++ ++ uint32_t write_ptr; // hardware causes this to advance ++ uint32_t read_ptr; // this module does the reading ++ int active; // is this slot in the hardware dma fifo? ++ uint32_t msgs_parsed; // count how many messages are in this slot ++ uint32_t msgs_released; // how many messages have been released ++ void *state; // connection state information ++ uint8_t ref_count[VCHI_MAX_SERVICES_PER_CONNECTION]; // reference count for slots held by services ++} RX_MSG_SLOTINFO_T; ++ ++// The message driver no longer needs to know about the fields of RX_BULK_SLOTINFO_T - sort this out. ++// In particular, it mustn't use addr and len - they're the client buffer, but the message ++// driver will be tasked with sending the aligned core section. ++typedef struct rx_bulk_slotinfo_t { ++ struct rx_bulk_slotinfo_t *next; ++ ++ struct semaphore *blocking; ++ ++ // needed by DMA ++ void *addr; ++ uint32_t len; ++ ++ // needed for the callback ++ void *service; ++ void *handle; ++ VCHI_FLAGS_T flags; ++} RX_BULK_SLOTINFO_T; ++ ++ ++/* ---------------------------------------------------------------------- ++ * each connection driver will have a pool of the following struct. ++ * ++ * the pool will be managed by vchi_qman_* ++ * this means there will be multiple queues (single linked lists) ++ * a given struct message_info will be on exactly one of these queues ++ * at any one time ++ * -------------------------------------------------------------------- */ ++typedef struct rx_message_info { ++ ++ struct message_info *next; ++ //struct message_info *prev; ++ ++ uint8_t *addr; ++ uint32_t len; ++ RX_MSG_SLOTINFO_T *slot; // points to whichever slot contains this message ++ uint32_t tx_timestamp; ++ uint32_t rx_timestamp; ++ ++} RX_MESSAGE_INFO_T; ++ ++typedef struct { ++ MESSAGE_EVENT_TYPE_T type; ++ ++ struct { ++ // for messages ++ void *addr; // address of message ++ uint16_t slot_delta; // whether this message indicated slot delta ++ uint32_t len; // length of message ++ RX_MSG_SLOTINFO_T *slot; // slot this message is in ++ int32_t service; // service id this message is destined for ++ uint32_t tx_timestamp; // timestamp from the header ++ uint32_t rx_timestamp; // timestamp when we parsed it ++ } message; ++ ++ // FIXME: cleanup slot reporting... ++ RX_MSG_SLOTINFO_T *rx_msg; ++ RX_BULK_SLOTINFO_T *rx_bulk; ++ void *tx_handle; ++ MESSAGE_TX_CHANNEL_T tx_channel; ++ ++} MESSAGE_EVENT_T; ++ ++ ++// callbacks ++typedef void VCHI_MESSAGE_DRIVER_EVENT_CALLBACK_T( void *state ); ++ ++typedef struct { ++ VCHI_MESSAGE_DRIVER_EVENT_CALLBACK_T *event_callback; ++} VCHI_MESSAGE_DRIVER_OPEN_T; ++ ++ ++// handle to this instance of message driver (as returned by ->open) ++typedef struct opaque_mhandle_t *VCHI_MDRIVER_HANDLE_T; ++ ++struct opaque_vchi_message_driver_t { ++ VCHI_MDRIVER_HANDLE_T *(*open)( VCHI_MESSAGE_DRIVER_OPEN_T *params, void *state ); ++ int32_t (*suspending)( VCHI_MDRIVER_HANDLE_T *handle ); ++ int32_t (*resumed)( VCHI_MDRIVER_HANDLE_T *handle ); ++ int32_t (*power_control)( VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T, int32_t enable ); ++ int32_t (*add_msg_rx_slot)( VCHI_MDRIVER_HANDLE_T *handle, RX_MSG_SLOTINFO_T *slot ); // rx message ++ int32_t (*add_bulk_rx)( VCHI_MDRIVER_HANDLE_T *handle, void *data, uint32_t len, RX_BULK_SLOTINFO_T *slot ); // rx data (bulk) ++ int32_t (*send)( VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T channel, const void *data, uint32_t len, VCHI_MSG_FLAGS_T flags, void *send_handle ); // tx (message & bulk) ++ void (*next_event)( VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_EVENT_T *event ); // get the next event from message_driver ++ int32_t (*enable)( VCHI_MDRIVER_HANDLE_T *handle ); ++ int32_t (*form_message)( VCHI_MDRIVER_HANDLE_T *handle, int32_t service_id, VCHI_MSG_VECTOR_T *vector, uint32_t count, void ++ *address, uint32_t length_avail, uint32_t max_total_length, int32_t pad_to_fill, int32_t allow_partial ); ++ ++ int32_t (*update_message)( VCHI_MDRIVER_HANDLE_T *handle, void *dest, int16_t *slot_count ); ++ int32_t (*buffer_aligned)( VCHI_MDRIVER_HANDLE_T *handle, int tx, int uncached, const void *address, const uint32_t length ); ++ void * (*allocate_buffer)( VCHI_MDRIVER_HANDLE_T *handle, uint32_t *length ); ++ void (*free_buffer)( VCHI_MDRIVER_HANDLE_T *handle, void *address ); ++ int (*rx_slot_size)( VCHI_MDRIVER_HANDLE_T *handle, int msg_size ); ++ int (*tx_slot_size)( VCHI_MDRIVER_HANDLE_T *handle, int msg_size ); ++ ++ int32_t (*tx_supports_terminate)( const VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T channel ); ++ uint32_t (*tx_bulk_chunk_size)( const VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T channel ); ++ int (*tx_alignment)( const VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T channel ); ++ int (*rx_alignment)( const VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_RX_CHANNEL_T channel ); ++ void (*form_bulk_aux)( VCHI_MDRIVER_HANDLE_T *handle, MESSAGE_TX_CHANNEL_T channel, const void *data, uint32_t len, uint32_t chunk_size, const void **aux_data, int32_t *aux_len ); ++ void (*debug)( VCHI_MDRIVER_HANDLE_T *handle ); ++}; ++ ++ ++#endif // _VCHI_MESSAGE_H_ ++ ++/****************************** End of file ***********************************/ +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchi/vchi.h +@@ -0,0 +1,378 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#ifndef VCHI_H_ ++#define VCHI_H_ ++ ++#include "interface/vchi/vchi_cfg.h" ++#include "interface/vchi/vchi_common.h" ++#include "interface/vchi/connections/connection.h" ++#include "vchi_mh.h" ++ ++ ++/****************************************************************************** ++ Global defs ++ *****************************************************************************/ ++ ++#define VCHI_BULK_ROUND_UP(x) ((((unsigned long)(x))+VCHI_BULK_ALIGN-1) & ~(VCHI_BULK_ALIGN-1)) ++#define VCHI_BULK_ROUND_DOWN(x) (((unsigned long)(x)) & ~(VCHI_BULK_ALIGN-1)) ++#define VCHI_BULK_ALIGN_NBYTES(x) (VCHI_BULK_ALIGNED(x) ? 0 : (VCHI_BULK_ALIGN - ((unsigned long)(x) & (VCHI_BULK_ALIGN-1)))) ++ ++#ifdef USE_VCHIQ_ARM ++#define VCHI_BULK_ALIGNED(x) 1 ++#else ++#define VCHI_BULK_ALIGNED(x) (((unsigned long)(x) & (VCHI_BULK_ALIGN-1)) == 0) ++#endif ++ ++struct vchi_version { ++ uint32_t version; ++ uint32_t version_min; ++}; ++#define VCHI_VERSION(v_) { v_, v_ } ++#define VCHI_VERSION_EX(v_, m_) { v_, m_ } ++ ++typedef enum ++{ ++ VCHI_VEC_POINTER, ++ VCHI_VEC_HANDLE, ++ VCHI_VEC_LIST ++} VCHI_MSG_VECTOR_TYPE_T; ++ ++typedef struct vchi_msg_vector_ex { ++ ++ VCHI_MSG_VECTOR_TYPE_T type; ++ union ++ { ++ // a memory handle ++ struct ++ { ++ VCHI_MEM_HANDLE_T handle; ++ uint32_t offset; ++ int32_t vec_len; ++ } handle; ++ ++ // an ordinary data pointer ++ struct ++ { ++ const void *vec_base; ++ int32_t vec_len; ++ } ptr; ++ ++ // a nested vector list ++ struct ++ { ++ struct vchi_msg_vector_ex *vec; ++ uint32_t vec_len; ++ } list; ++ } u; ++} VCHI_MSG_VECTOR_EX_T; ++ ++ ++// Construct an entry in a msg vector for a pointer (p) of length (l) ++#define VCHI_VEC_POINTER(p,l) VCHI_VEC_POINTER, { { (VCHI_MEM_HANDLE_T)(p), (l) } } ++ ++// Construct an entry in a msg vector for a message handle (h), starting at offset (o) of length (l) ++#define VCHI_VEC_HANDLE(h,o,l) VCHI_VEC_HANDLE, { { (h), (o), (l) } } ++ ++// Macros to manipulate 'FOURCC' values ++#define MAKE_FOURCC(x) ((int32_t)( (x[0] << 24) | (x[1] << 16) | (x[2] << 8) | x[3] )) ++#define FOURCC_TO_CHAR(x) (x >> 24) & 0xFF,(x >> 16) & 0xFF,(x >> 8) & 0xFF, x & 0xFF ++ ++ ++// Opaque service information ++struct opaque_vchi_service_t; ++ ++// Descriptor for a held message. Allocated by client, initialised by vchi_msg_hold, ++// vchi_msg_iter_hold or vchi_msg_iter_hold_next. Fields are for internal VCHI use only. ++typedef struct ++{ ++ struct opaque_vchi_service_t *service; ++ void *message; ++} VCHI_HELD_MSG_T; ++ ++ ++ ++// structure used to provide the information needed to open a server or a client ++typedef struct { ++ struct vchi_version version; ++ int32_t service_id; ++ VCHI_CONNECTION_T *connection; ++ uint32_t rx_fifo_size; ++ uint32_t tx_fifo_size; ++ VCHI_CALLBACK_T callback; ++ void *callback_param; ++ /* client intends to receive bulk transfers of ++ odd lengths or into unaligned buffers */ ++ int32_t want_unaligned_bulk_rx; ++ /* client intends to transmit bulk transfers of ++ odd lengths or out of unaligned buffers */ ++ int32_t want_unaligned_bulk_tx; ++ /* client wants to check CRCs on (bulk) xfers. ++ Only needs to be set at 1 end - will do both directions. */ ++ int32_t want_crc; ++} SERVICE_CREATION_T; ++ ++// Opaque handle for a VCHI instance ++typedef struct opaque_vchi_instance_handle_t *VCHI_INSTANCE_T; ++ ++// Opaque handle for a server or client ++typedef struct opaque_vchi_service_handle_t *VCHI_SERVICE_HANDLE_T; ++ ++// Service registration & startup ++typedef void (*VCHI_SERVICE_INIT)(VCHI_INSTANCE_T initialise_instance, VCHI_CONNECTION_T **connections, uint32_t num_connections); ++ ++typedef struct service_info_tag { ++ const char * const vll_filename; /* VLL to load to start this service. This is an empty string if VLL is "static" */ ++ VCHI_SERVICE_INIT init; /* Service initialisation function */ ++ void *vll_handle; /* VLL handle; NULL when unloaded or a "static VLL" in build */ ++} SERVICE_INFO_T; ++ ++/****************************************************************************** ++ Global funcs - implementation is specific to which side you are on (local / remote) ++ *****************************************************************************/ ++ ++#ifdef __cplusplus ++extern "C" { ++#endif ++ ++extern /*@observer@*/ VCHI_CONNECTION_T * vchi_create_connection( const VCHI_CONNECTION_API_T * function_table, ++ const VCHI_MESSAGE_DRIVER_T * low_level); ++ ++ ++// Routine used to initialise the vchi on both local + remote connections ++extern int32_t vchi_initialise( VCHI_INSTANCE_T *instance_handle ); ++ ++extern int32_t vchi_exit( void ); ++ ++extern int32_t vchi_connect( VCHI_CONNECTION_T **connections, ++ const uint32_t num_connections, ++ VCHI_INSTANCE_T instance_handle ); ++ ++//When this is called, ensure that all services have no data pending. ++//Bulk transfers can remain 'queued' ++extern int32_t vchi_disconnect( VCHI_INSTANCE_T instance_handle ); ++ ++// Global control over bulk CRC checking ++extern int32_t vchi_crc_control( VCHI_CONNECTION_T *connection, ++ VCHI_CRC_CONTROL_T control ); ++ ++// helper functions ++extern void * vchi_allocate_buffer(VCHI_SERVICE_HANDLE_T handle, uint32_t *length); ++extern void vchi_free_buffer(VCHI_SERVICE_HANDLE_T handle, void *address); ++extern uint32_t vchi_current_time(VCHI_INSTANCE_T instance_handle); ++ ++ ++/****************************************************************************** ++ Global service API ++ *****************************************************************************/ ++// Routine to create a named service ++extern int32_t vchi_service_create( VCHI_INSTANCE_T instance_handle, ++ SERVICE_CREATION_T *setup, ++ VCHI_SERVICE_HANDLE_T *handle ); ++ ++// Routine to destory a service ++extern int32_t vchi_service_destroy( const VCHI_SERVICE_HANDLE_T handle ); ++ ++// Routine to open a named service ++extern int32_t vchi_service_open( VCHI_INSTANCE_T instance_handle, ++ SERVICE_CREATION_T *setup, ++ VCHI_SERVICE_HANDLE_T *handle); ++ ++extern int32_t vchi_get_peer_version( const VCHI_SERVICE_HANDLE_T handle, ++ short *peer_version ); ++ ++// Routine to close a named service ++extern int32_t vchi_service_close( const VCHI_SERVICE_HANDLE_T handle ); ++ ++// Routine to increment ref count on a named service ++extern int32_t vchi_service_use( const VCHI_SERVICE_HANDLE_T handle ); ++ ++// Routine to decrement ref count on a named service ++extern int32_t vchi_service_release( const VCHI_SERVICE_HANDLE_T handle ); ++ ++// Routine to set a control option for a named service ++extern int32_t vchi_service_set_option( const VCHI_SERVICE_HANDLE_T handle, ++ VCHI_SERVICE_OPTION_T option, ++ int value); ++ ++// Routine to send a message across a service ++extern int32_t vchi_msg_queue( VCHI_SERVICE_HANDLE_T handle, ++ const void *data, ++ uint32_t data_size, ++ VCHI_FLAGS_T flags, ++ void *msg_handle ); ++ ++// scatter-gather (vector) and send message ++int32_t vchi_msg_queuev_ex( VCHI_SERVICE_HANDLE_T handle, ++ VCHI_MSG_VECTOR_EX_T *vector, ++ uint32_t count, ++ VCHI_FLAGS_T flags, ++ void *msg_handle ); ++ ++// legacy scatter-gather (vector) and send message, only handles pointers ++int32_t vchi_msg_queuev( VCHI_SERVICE_HANDLE_T handle, ++ VCHI_MSG_VECTOR_T *vector, ++ uint32_t count, ++ VCHI_FLAGS_T flags, ++ void *msg_handle ); ++ ++// Routine to receive a msg from a service ++// Dequeue is equivalent to hold, copy into client buffer, release ++extern int32_t vchi_msg_dequeue( VCHI_SERVICE_HANDLE_T handle, ++ void *data, ++ uint32_t max_data_size_to_read, ++ uint32_t *actual_msg_size, ++ VCHI_FLAGS_T flags ); ++ ++// Routine to look at a message in place. ++// The message is not dequeued, so a subsequent call to peek or dequeue ++// will return the same message. ++extern int32_t vchi_msg_peek( VCHI_SERVICE_HANDLE_T handle, ++ void **data, ++ uint32_t *msg_size, ++ VCHI_FLAGS_T flags ); ++ ++// Routine to remove a message after it has been read in place with peek ++// The first message on the queue is dequeued. ++extern int32_t vchi_msg_remove( VCHI_SERVICE_HANDLE_T handle ); ++ ++// Routine to look at a message in place. ++// The message is dequeued, so the caller is left holding it; the descriptor is ++// filled in and must be released when the user has finished with the message. ++extern int32_t vchi_msg_hold( VCHI_SERVICE_HANDLE_T handle, ++ void **data, // } may be NULL, as info can be ++ uint32_t *msg_size, // } obtained from HELD_MSG_T ++ VCHI_FLAGS_T flags, ++ VCHI_HELD_MSG_T *message_descriptor ); ++ ++// Initialise an iterator to look through messages in place ++extern int32_t vchi_msg_look_ahead( VCHI_SERVICE_HANDLE_T handle, ++ VCHI_MSG_ITER_T *iter, ++ VCHI_FLAGS_T flags ); ++ ++/****************************************************************************** ++ Global service support API - operations on held messages and message iterators ++ *****************************************************************************/ ++ ++// Routine to get the address of a held message ++extern void *vchi_held_msg_ptr( const VCHI_HELD_MSG_T *message ); ++ ++// Routine to get the size of a held message ++extern int32_t vchi_held_msg_size( const VCHI_HELD_MSG_T *message ); ++ ++// Routine to get the transmit timestamp as written into the header by the peer ++extern uint32_t vchi_held_msg_tx_timestamp( const VCHI_HELD_MSG_T *message ); ++ ++// Routine to get the reception timestamp, written as we parsed the header ++extern uint32_t vchi_held_msg_rx_timestamp( const VCHI_HELD_MSG_T *message ); ++ ++// Routine to release a held message after it has been processed ++extern int32_t vchi_held_msg_release( VCHI_HELD_MSG_T *message ); ++ ++// Indicates whether the iterator has a next message. ++extern int32_t vchi_msg_iter_has_next( const VCHI_MSG_ITER_T *iter ); ++ ++// Return the pointer and length for the next message and advance the iterator. ++extern int32_t vchi_msg_iter_next( VCHI_MSG_ITER_T *iter, ++ void **data, ++ uint32_t *msg_size ); ++ ++// Remove the last message returned by vchi_msg_iter_next. ++// Can only be called once after each call to vchi_msg_iter_next. ++extern int32_t vchi_msg_iter_remove( VCHI_MSG_ITER_T *iter ); ++ ++// Hold the last message returned by vchi_msg_iter_next. ++// Can only be called once after each call to vchi_msg_iter_next. ++extern int32_t vchi_msg_iter_hold( VCHI_MSG_ITER_T *iter, ++ VCHI_HELD_MSG_T *message ); ++ ++// Return information for the next message, and hold it, advancing the iterator. ++extern int32_t vchi_msg_iter_hold_next( VCHI_MSG_ITER_T *iter, ++ void **data, // } may be NULL ++ uint32_t *msg_size, // } ++ VCHI_HELD_MSG_T *message ); ++ ++ ++/****************************************************************************** ++ Global bulk API ++ *****************************************************************************/ ++ ++// Routine to prepare interface for a transfer from the other side ++extern int32_t vchi_bulk_queue_receive( VCHI_SERVICE_HANDLE_T handle, ++ void *data_dst, ++ uint32_t data_size, ++ VCHI_FLAGS_T flags, ++ void *transfer_handle ); ++ ++ ++// Prepare interface for a transfer from the other side into relocatable memory. ++int32_t vchi_bulk_queue_receive_reloc( const VCHI_SERVICE_HANDLE_T handle, ++ VCHI_MEM_HANDLE_T h_dst, ++ uint32_t offset, ++ uint32_t data_size, ++ const VCHI_FLAGS_T flags, ++ void * const bulk_handle ); ++ ++// Routine to queue up data ready for transfer to the other (once they have signalled they are ready) ++extern int32_t vchi_bulk_queue_transmit( VCHI_SERVICE_HANDLE_T handle, ++ const void *data_src, ++ uint32_t data_size, ++ VCHI_FLAGS_T flags, ++ void *transfer_handle ); ++ ++ ++/****************************************************************************** ++ Configuration plumbing ++ *****************************************************************************/ ++ ++// function prototypes for the different mid layers (the state info gives the different physical connections) ++extern const VCHI_CONNECTION_API_T *single_get_func_table( void ); ++//extern const VCHI_CONNECTION_API_T *local_server_get_func_table( void ); ++//extern const VCHI_CONNECTION_API_T *local_client_get_func_table( void ); ++ ++// declare all message drivers here ++const VCHI_MESSAGE_DRIVER_T *vchi_mphi_message_driver_func_table( void ); ++ ++#ifdef __cplusplus ++} ++#endif ++ ++extern int32_t vchi_bulk_queue_transmit_reloc( VCHI_SERVICE_HANDLE_T handle, ++ VCHI_MEM_HANDLE_T h_src, ++ uint32_t offset, ++ uint32_t data_size, ++ VCHI_FLAGS_T flags, ++ void *transfer_handle ); ++#endif /* VCHI_H_ */ ++ ++/****************************** End of file **********************************/ +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchi/vchi_cfg.h +@@ -0,0 +1,224 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#ifndef VCHI_CFG_H_ ++#define VCHI_CFG_H_ ++ ++/**************************************************************************************** ++ * Defines in this first section are part of the VCHI API and may be examined by VCHI ++ * services. ++ ***************************************************************************************/ ++ ++/* Required alignment of base addresses for bulk transfer, if unaligned transfers are not enabled */ ++/* Really determined by the message driver, and should be available from a run-time call. */ ++#ifndef VCHI_BULK_ALIGN ++# if __VCCOREVER__ >= 0x04000000 ++# define VCHI_BULK_ALIGN 32 // Allows for the need to do cache cleans ++# else ++# define VCHI_BULK_ALIGN 16 ++# endif ++#endif ++ ++/* Required length multiple for bulk transfers, if unaligned transfers are not enabled */ ++/* May be less than or greater than VCHI_BULK_ALIGN */ ++/* Really determined by the message driver, and should be available from a run-time call. */ ++#ifndef VCHI_BULK_GRANULARITY ++# if __VCCOREVER__ >= 0x04000000 ++# define VCHI_BULK_GRANULARITY 32 // Allows for the need to do cache cleans ++# else ++# define VCHI_BULK_GRANULARITY 16 ++# endif ++#endif ++ ++/* The largest possible message to be queued with vchi_msg_queue. */ ++#ifndef VCHI_MAX_MSG_SIZE ++# if defined VCHI_LOCAL_HOST_PORT ++# define VCHI_MAX_MSG_SIZE 16384 // makes file transfers fast, but should they be using bulk? ++# else ++# define VCHI_MAX_MSG_SIZE 4096 // NOTE: THIS MUST BE LARGER THAN OR EQUAL TO THE SIZE OF THE KHRONOS MERGE BUFFER!! ++# endif ++#endif ++ ++/****************************************************************************************** ++ * Defines below are system configuration options, and should not be used by VCHI services. ++ *****************************************************************************************/ ++ ++/* How many connections can we support? A localhost implementation uses 2 connections, ++ * 1 for host-app, 1 for VMCS, and these are hooked together by a loopback MPHI VCFW ++ * driver. */ ++#ifndef VCHI_MAX_NUM_CONNECTIONS ++# define VCHI_MAX_NUM_CONNECTIONS 3 ++#endif ++ ++/* How many services can we open per connection? Extending this doesn't cost processing time, just a small ++ * amount of static memory. */ ++#ifndef VCHI_MAX_SERVICES_PER_CONNECTION ++# define VCHI_MAX_SERVICES_PER_CONNECTION 36 ++#endif ++ ++/* Adjust if using a message driver that supports more logical TX channels */ ++#ifndef VCHI_MAX_BULK_TX_CHANNELS_PER_CONNECTION ++# define VCHI_MAX_BULK_TX_CHANNELS_PER_CONNECTION 9 // 1 MPHI + 8 CCP2 logical channels ++#endif ++ ++/* Adjust if using a message driver that supports more logical RX channels */ ++#ifndef VCHI_MAX_BULK_RX_CHANNELS_PER_CONNECTION ++# define VCHI_MAX_BULK_RX_CHANNELS_PER_CONNECTION 1 // 1 MPHI ++#endif ++ ++/* How many receive slots do we use. This times VCHI_MAX_MSG_SIZE gives the effective ++ * receive queue space, less message headers. */ ++#ifndef VCHI_NUM_READ_SLOTS ++# if defined(VCHI_LOCAL_HOST_PORT) ++# define VCHI_NUM_READ_SLOTS 4 ++# else ++# define VCHI_NUM_READ_SLOTS 48 ++# endif ++#endif ++ ++/* Do we utilise overrun facility for receive message slots? Can aid peer transmit ++ * performance. Only define on VideoCore end, talking to host. ++ */ ++//#define VCHI_MSG_RX_OVERRUN ++ ++/* How many transmit slots do we use. Generally don't need many, as the hardware driver ++ * underneath VCHI will usually have its own buffering. */ ++#ifndef VCHI_NUM_WRITE_SLOTS ++# define VCHI_NUM_WRITE_SLOTS 4 ++#endif ++ ++/* If a service has held or queued received messages in VCHI_XOFF_THRESHOLD or more slots, ++ * then it's taking up too much buffer space, and the peer service will be told to stop ++ * transmitting with an XOFF message. For this to be effective, the VCHI_NUM_READ_SLOTS ++ * needs to be considerably bigger than VCHI_NUM_WRITE_SLOTS, or the transmit latency ++ * is too high. */ ++#ifndef VCHI_XOFF_THRESHOLD ++# define VCHI_XOFF_THRESHOLD (VCHI_NUM_READ_SLOTS / 2) ++#endif ++ ++/* After we've sent an XOFF, the peer will be told to resume transmission once the local ++ * service has dequeued/released enough messages that it's now occupying ++ * VCHI_XON_THRESHOLD slots or fewer. */ ++#ifndef VCHI_XON_THRESHOLD ++# define VCHI_XON_THRESHOLD (VCHI_NUM_READ_SLOTS / 4) ++#endif ++ ++/* A size below which a bulk transfer omits the handshake completely and always goes ++ * via the message channel, if bulk auxiliary is being sent on that service. (The user ++ * can guarantee this by enabling unaligned transmits). ++ * Not API. */ ++#ifndef VCHI_MIN_BULK_SIZE ++# define VCHI_MIN_BULK_SIZE ( VCHI_MAX_MSG_SIZE / 2 < 4096 ? VCHI_MAX_MSG_SIZE / 2 : 4096 ) ++#endif ++ ++/* Maximum size of bulk transmission chunks, for each interface type. A trade-off between ++ * speed and latency; the smaller the chunk size the better change of messages and other ++ * bulk transmissions getting in when big bulk transfers are happening. Set to 0 to not ++ * break transmissions into chunks. ++ */ ++#ifndef VCHI_MAX_BULK_CHUNK_SIZE_MPHI ++# define VCHI_MAX_BULK_CHUNK_SIZE_MPHI (16 * 1024) ++#endif ++ ++/* NB Chunked CCP2 transmissions violate the letter of the CCP2 spec by using "JPEG8" mode ++ * with multiple-line frames. Only use if the receiver can cope. */ ++#ifndef VCHI_MAX_BULK_CHUNK_SIZE_CCP2 ++# define VCHI_MAX_BULK_CHUNK_SIZE_CCP2 0 ++#endif ++ ++/* How many TX messages can we have pending in our transmit slots. Once exhausted, ++ * vchi_msg_queue will be blocked. */ ++#ifndef VCHI_TX_MSG_QUEUE_SIZE ++# define VCHI_TX_MSG_QUEUE_SIZE 256 ++#endif ++ ++/* How many RX messages can we have parsed in the receive slots. Once exhausted, parsing ++ * will be suspended until older messages are dequeued/released. */ ++#ifndef VCHI_RX_MSG_QUEUE_SIZE ++# define VCHI_RX_MSG_QUEUE_SIZE 256 ++#endif ++ ++/* Really should be able to cope if we run out of received message descriptors, by ++ * suspending parsing as the comment above says, but we don't. This sweeps the issue ++ * under the carpet. */ ++#if VCHI_RX_MSG_QUEUE_SIZE < (VCHI_MAX_MSG_SIZE/16 + 1) * VCHI_NUM_READ_SLOTS ++# undef VCHI_RX_MSG_QUEUE_SIZE ++# define VCHI_RX_MSG_QUEUE_SIZE (VCHI_MAX_MSG_SIZE/16 + 1) * VCHI_NUM_READ_SLOTS ++#endif ++ ++/* How many bulk transmits can we have pending. Once exhausted, vchi_bulk_queue_transmit ++ * will be blocked. */ ++#ifndef VCHI_TX_BULK_QUEUE_SIZE ++# define VCHI_TX_BULK_QUEUE_SIZE 64 ++#endif ++ ++/* How many bulk receives can we have pending. Once exhausted, vchi_bulk_queue_receive ++ * will be blocked. */ ++#ifndef VCHI_RX_BULK_QUEUE_SIZE ++# define VCHI_RX_BULK_QUEUE_SIZE 64 ++#endif ++ ++/* A limit on how many outstanding bulk requests we expect the peer to give us. If ++ * the peer asks for more than this, VCHI will fail and assert. The number is determined ++ * by the peer's hardware - it's the number of outstanding requests that can be queued ++ * on all bulk channels. VC3's MPHI peripheral allows 16. */ ++#ifndef VCHI_MAX_PEER_BULK_REQUESTS ++# define VCHI_MAX_PEER_BULK_REQUESTS 32 ++#endif ++ ++/* Define VCHI_CCP2TX_MANUAL_POWER if the host tells us when to turn the CCP2 ++ * transmitter on and off. ++ */ ++/*#define VCHI_CCP2TX_MANUAL_POWER*/ ++ ++#ifndef VCHI_CCP2TX_MANUAL_POWER ++ ++/* Timeout (in milliseconds) for putting the CCP2TX interface into IDLE state. Set ++ * negative for no IDLE. ++ */ ++# ifndef VCHI_CCP2TX_IDLE_TIMEOUT ++# define VCHI_CCP2TX_IDLE_TIMEOUT 5 ++# endif ++ ++/* Timeout (in milliseconds) for putting the CCP2TX interface into OFF state. Set ++ * negative for no OFF. ++ */ ++# ifndef VCHI_CCP2TX_OFF_TIMEOUT ++# define VCHI_CCP2TX_OFF_TIMEOUT 1000 ++# endif ++ ++#endif /* VCHI_CCP2TX_MANUAL_POWER */ ++ ++#endif /* VCHI_CFG_H_ */ ++ ++/****************************** End of file **********************************/ +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchi/vchi_cfg_internal.h +@@ -0,0 +1,71 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#ifndef VCHI_CFG_INTERNAL_H_ ++#define VCHI_CFG_INTERNAL_H_ ++ ++/**************************************************************************************** ++ * Control optimisation attempts. ++ ***************************************************************************************/ ++ ++// Don't use lots of short-term locks - use great long ones, reducing the overall locks-per-second ++#define VCHI_COARSE_LOCKING ++ ++// Avoid lock then unlock on exit from blocking queue operations (msg tx, bulk rx/tx) ++// (only relevant if VCHI_COARSE_LOCKING) ++#define VCHI_ELIDE_BLOCK_EXIT_LOCK ++ ++// Avoid lock on non-blocking peek ++// (only relevant if VCHI_COARSE_LOCKING) ++#define VCHI_AVOID_PEEK_LOCK ++ ++// Use one slot-handler thread per connection, rather than 1 thread dealing with all connections in rotation. ++#define VCHI_MULTIPLE_HANDLER_THREADS ++ ++// Put free descriptors onto the head of the free queue, rather than the tail, so that we don't thrash ++// our way through the pool of descriptors. ++#define VCHI_PUSH_FREE_DESCRIPTORS_ONTO_HEAD ++ ++// Don't issue a MSG_AVAILABLE callback for every single message. Possibly only safe if VCHI_COARSE_LOCKING. ++#define VCHI_FEWER_MSG_AVAILABLE_CALLBACKS ++ ++// Don't use message descriptors for TX messages that don't need them ++#define VCHI_MINIMISE_TX_MSG_DESCRIPTORS ++ ++// Nano-locks for multiqueue ++//#define VCHI_MQUEUE_NANOLOCKS ++ ++// Lock-free(er) dequeuing ++//#define VCHI_RX_NANOLOCKS ++ ++#endif /*VCHI_CFG_INTERNAL_H_*/ +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchi/vchi_common.h +@@ -0,0 +1,175 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#ifndef VCHI_COMMON_H_ ++#define VCHI_COMMON_H_ ++ ++ ++//flags used when sending messages (must be bitmapped) ++typedef enum ++{ ++ VCHI_FLAGS_NONE = 0x0, ++ VCHI_FLAGS_BLOCK_UNTIL_OP_COMPLETE = 0x1, // waits for message to be received, or sent (NB. not the same as being seen on other side) ++ VCHI_FLAGS_CALLBACK_WHEN_OP_COMPLETE = 0x2, // run a callback when message sent ++ VCHI_FLAGS_BLOCK_UNTIL_QUEUED = 0x4, // return once the transfer is in a queue ready to go ++ VCHI_FLAGS_ALLOW_PARTIAL = 0x8, ++ VCHI_FLAGS_BLOCK_UNTIL_DATA_READ = 0x10, ++ VCHI_FLAGS_CALLBACK_WHEN_DATA_READ = 0x20, ++ ++ VCHI_FLAGS_ALIGN_SLOT = 0x000080, // internal use only ++ VCHI_FLAGS_BULK_AUX_QUEUED = 0x010000, // internal use only ++ VCHI_FLAGS_BULK_AUX_COMPLETE = 0x020000, // internal use only ++ VCHI_FLAGS_BULK_DATA_QUEUED = 0x040000, // internal use only ++ VCHI_FLAGS_BULK_DATA_COMPLETE = 0x080000, // internal use only ++ VCHI_FLAGS_INTERNAL = 0xFF0000 ++} VCHI_FLAGS_T; ++ ++// constants for vchi_crc_control() ++typedef enum { ++ VCHI_CRC_NOTHING = -1, ++ VCHI_CRC_PER_SERVICE = 0, ++ VCHI_CRC_EVERYTHING = 1, ++} VCHI_CRC_CONTROL_T; ++ ++//callback reasons when an event occurs on a service ++typedef enum ++{ ++ VCHI_CALLBACK_REASON_MIN, ++ ++ //This indicates that there is data available ++ //handle is the msg id that was transmitted with the data ++ // When a message is received and there was no FULL message available previously, send callback ++ // Tasks get kicked by the callback, reset their event and try and read from the fifo until it fails ++ VCHI_CALLBACK_MSG_AVAILABLE, ++ VCHI_CALLBACK_MSG_SENT, ++ VCHI_CALLBACK_MSG_SPACE_AVAILABLE, // XXX not yet implemented ++ ++ // This indicates that a transfer from the other side has completed ++ VCHI_CALLBACK_BULK_RECEIVED, ++ //This indicates that data queued up to be sent has now gone ++ //handle is the msg id that was used when sending the data ++ VCHI_CALLBACK_BULK_SENT, ++ VCHI_CALLBACK_BULK_RX_SPACE_AVAILABLE, // XXX not yet implemented ++ VCHI_CALLBACK_BULK_TX_SPACE_AVAILABLE, // XXX not yet implemented ++ ++ VCHI_CALLBACK_SERVICE_CLOSED, ++ ++ // this side has sent XOFF to peer due to lack of data consumption by service ++ // (suggests the service may need to take some recovery action if it has ++ // been deliberately holding off consuming data) ++ VCHI_CALLBACK_SENT_XOFF, ++ VCHI_CALLBACK_SENT_XON, ++ ++ // indicates that a bulk transfer has finished reading the source buffer ++ VCHI_CALLBACK_BULK_DATA_READ, ++ ++ // power notification events (currently host side only) ++ VCHI_CALLBACK_PEER_OFF, ++ VCHI_CALLBACK_PEER_SUSPENDED, ++ VCHI_CALLBACK_PEER_ON, ++ VCHI_CALLBACK_PEER_RESUMED, ++ VCHI_CALLBACK_FORCED_POWER_OFF, ++ ++#ifdef USE_VCHIQ_ARM ++ // some extra notifications provided by vchiq_arm ++ VCHI_CALLBACK_SERVICE_OPENED, ++ VCHI_CALLBACK_BULK_RECEIVE_ABORTED, ++ VCHI_CALLBACK_BULK_TRANSMIT_ABORTED, ++#endif ++ ++ VCHI_CALLBACK_REASON_MAX ++} VCHI_CALLBACK_REASON_T; ++ ++// service control options ++typedef enum ++{ ++ VCHI_SERVICE_OPTION_MIN, ++ ++ VCHI_SERVICE_OPTION_TRACE, ++ VCHI_SERVICE_OPTION_SYNCHRONOUS, ++ ++ VCHI_SERVICE_OPTION_MAX ++} VCHI_SERVICE_OPTION_T; ++ ++ ++//Callback used by all services / bulk transfers ++typedef void (*VCHI_CALLBACK_T)( void *callback_param, //my service local param ++ VCHI_CALLBACK_REASON_T reason, ++ void *handle ); //for transmitting msg's only ++ ++ ++ ++/* ++ * Define vector struct for scatter-gather (vector) operations ++ * Vectors can be nested - if a vector element has negative length, then ++ * the data pointer is treated as pointing to another vector array, with ++ * '-vec_len' elements. Thus to append a header onto an existing vector, ++ * you can do this: ++ * ++ * void foo(const VCHI_MSG_VECTOR_T *v, int n) ++ * { ++ * VCHI_MSG_VECTOR_T nv[2]; ++ * nv[0].vec_base = my_header; ++ * nv[0].vec_len = sizeof my_header; ++ * nv[1].vec_base = v; ++ * nv[1].vec_len = -n; ++ * ... ++ * ++ */ ++typedef struct vchi_msg_vector { ++ const void *vec_base; ++ int32_t vec_len; ++} VCHI_MSG_VECTOR_T; ++ ++// Opaque type for a connection API ++typedef struct opaque_vchi_connection_api_t VCHI_CONNECTION_API_T; ++ ++// Opaque type for a message driver ++typedef struct opaque_vchi_message_driver_t VCHI_MESSAGE_DRIVER_T; ++ ++ ++// Iterator structure for reading ahead through received message queue. Allocated by client, ++// initialised by vchi_msg_look_ahead. Fields are for internal VCHI use only. ++// Iterates over messages in queue at the instant of the call to vchi_msg_lookahead - ++// will not proceed to messages received since. Behaviour is undefined if an iterator ++// is used again after messages for that service are removed/dequeued by any ++// means other than vchi_msg_iter_... calls on the iterator itself. ++typedef struct { ++ struct opaque_vchi_service_t *service; ++ void *last; ++ void *next; ++ void *remove; ++} VCHI_MSG_ITER_T; ++ ++ ++#endif // VCHI_COMMON_H_ +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchi/vchi_mh.h +@@ -0,0 +1,42 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#ifndef VCHI_MH_H_ ++#define VCHI_MH_H_ ++ ++#include <linux/types.h> ++ ++typedef int32_t VCHI_MEM_HANDLE_T; ++#define VCHI_MEM_HANDLE_INVALID 0 ++ ++#endif +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq.h +@@ -0,0 +1,40 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#ifndef VCHIQ_VCHIQ_H ++#define VCHIQ_VCHIQ_H ++ ++#include "vchiq_if.h" ++#include "vchiq_util.h" ++ ++#endif +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_2835.h +@@ -0,0 +1,42 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#ifndef VCHIQ_2835_H ++#define VCHIQ_2835_H ++ ++#include "vchiq_pagelist.h" ++ ++#define VCHIQ_PLATFORM_FRAGMENTS_OFFSET_IDX 0 ++#define VCHIQ_PLATFORM_FRAGMENTS_COUNT_IDX 1 ++ ++#endif /* VCHIQ_2835_H */ +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c +@@ -0,0 +1,586 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#include <linux/kernel.h> ++#include <linux/types.h> ++#include <linux/errno.h> ++#include <linux/interrupt.h> ++#include <linux/pagemap.h> ++#include <linux/dma-mapping.h> ++#include <linux/version.h> ++#include <linux/io.h> ++#include <linux/platform_device.h> ++#include <linux/uaccess.h> ++#include <linux/of.h> ++#include <asm/pgtable.h> ++#include <soc/bcm2835/raspberrypi-firmware.h> ++ ++#define dmac_map_area __glue(_CACHE,_dma_map_area) ++#define dmac_unmap_area __glue(_CACHE,_dma_unmap_area) ++ ++extern void dmac_map_area(const void *, size_t, int); ++extern void dmac_unmap_area(const void *, size_t, int); ++ ++#define TOTAL_SLOTS (VCHIQ_SLOT_ZERO_SLOTS + 2 * 32) ++ ++#define VCHIQ_ARM_ADDRESS(x) ((void *)((char *)x + g_virt_to_bus_offset)) ++ ++#include "vchiq_arm.h" ++#include "vchiq_2835.h" ++#include "vchiq_connected.h" ++#include "vchiq_killable.h" ++ ++#define MAX_FRAGMENTS (VCHIQ_NUM_CURRENT_BULKS * 2) ++ ++#define BELL0 0x00 ++#define BELL2 0x08 ++ ++typedef struct vchiq_2835_state_struct { ++ int inited; ++ VCHIQ_ARM_STATE_T arm_state; ++} VCHIQ_2835_ARM_STATE_T; ++ ++static void __iomem *g_regs; ++static unsigned int g_cache_line_size = sizeof(CACHE_LINE_SIZE); ++static unsigned int g_fragments_size; ++static char *g_fragments_base; ++static char *g_free_fragments; ++static struct semaphore g_free_fragments_sema; ++static unsigned long g_virt_to_bus_offset; ++ ++extern int vchiq_arm_log_level; ++ ++static DEFINE_SEMAPHORE(g_free_fragments_mutex); ++ ++static irqreturn_t ++vchiq_doorbell_irq(int irq, void *dev_id); ++ ++static int ++create_pagelist(char __user *buf, size_t count, unsigned short type, ++ struct task_struct *task, PAGELIST_T ** ppagelist); ++ ++static void ++free_pagelist(PAGELIST_T *pagelist, int actual); ++ ++int vchiq_platform_init(struct platform_device *pdev, VCHIQ_STATE_T *state) ++{ ++ struct device *dev = &pdev->dev; ++ struct rpi_firmware *fw = platform_get_drvdata(pdev); ++ VCHIQ_SLOT_ZERO_T *vchiq_slot_zero; ++ struct resource *res; ++ void *slot_mem; ++ dma_addr_t slot_phys; ++ u32 channelbase; ++ int slot_mem_size, frag_mem_size; ++ int err, irq, i; ++ ++ g_virt_to_bus_offset = virt_to_dma(dev, (void *)0); ++ ++ (void)of_property_read_u32(dev->of_node, "cache-line-size", ++ &g_cache_line_size); ++ g_fragments_size = 2 * g_cache_line_size; ++ ++ /* Allocate space for the channels in coherent memory */ ++ slot_mem_size = PAGE_ALIGN(TOTAL_SLOTS * VCHIQ_SLOT_SIZE); ++ frag_mem_size = PAGE_ALIGN(g_fragments_size * MAX_FRAGMENTS); ++ ++ slot_mem = dmam_alloc_coherent(dev, slot_mem_size + frag_mem_size, ++ &slot_phys, GFP_KERNEL); ++ if (!slot_mem) { ++ dev_err(dev, "could not allocate DMA memory\n"); ++ return -ENOMEM; ++ } ++ ++ WARN_ON(((int)slot_mem & (PAGE_SIZE - 1)) != 0); ++ ++ vchiq_slot_zero = vchiq_init_slots(slot_mem, slot_mem_size); ++ if (!vchiq_slot_zero) ++ return -EINVAL; ++ ++ vchiq_slot_zero->platform_data[VCHIQ_PLATFORM_FRAGMENTS_OFFSET_IDX] = ++ (int)slot_phys + slot_mem_size; ++ vchiq_slot_zero->platform_data[VCHIQ_PLATFORM_FRAGMENTS_COUNT_IDX] = ++ MAX_FRAGMENTS; ++ ++ g_fragments_base = (char *)slot_mem + slot_mem_size; ++ slot_mem_size += frag_mem_size; ++ ++ g_free_fragments = g_fragments_base; ++ for (i = 0; i < (MAX_FRAGMENTS - 1); i++) { ++ *(char **)&g_fragments_base[i*g_fragments_size] = ++ &g_fragments_base[(i + 1)*g_fragments_size]; ++ } ++ *(char **)&g_fragments_base[i * g_fragments_size] = NULL; ++ sema_init(&g_free_fragments_sema, MAX_FRAGMENTS); ++ ++ if (vchiq_init_state(state, vchiq_slot_zero, 0) != VCHIQ_SUCCESS) ++ return -EINVAL; ++ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ g_regs = devm_ioremap_resource(&pdev->dev, res); ++ if (IS_ERR(g_regs)) ++ return PTR_ERR(g_regs); ++ ++ irq = platform_get_irq(pdev, 0); ++ if (irq <= 0) { ++ dev_err(dev, "failed to get IRQ\n"); ++ return irq; ++ } ++ ++ err = devm_request_irq(dev, irq, vchiq_doorbell_irq, IRQF_IRQPOLL, ++ "VCHIQ doorbell", state); ++ if (err) { ++ dev_err(dev, "failed to register irq=%d\n", irq); ++ return err; ++ } ++ ++ /* Send the base address of the slots to VideoCore */ ++ channelbase = slot_phys; ++ err = rpi_firmware_property(fw, RPI_FIRMWARE_VCHIQ_INIT, ++ &channelbase, sizeof(channelbase)); ++ if (err || channelbase) { ++ dev_err(dev, "failed to set channelbase\n"); ++ return err ? : -ENXIO; ++ } ++ ++ vchiq_log_info(vchiq_arm_log_level, ++ "vchiq_init - done (slots %x, phys %pad)", ++ (unsigned int)vchiq_slot_zero, &slot_phys); ++ ++ vchiq_call_connected_callbacks(); ++ ++ return 0; ++} ++ ++VCHIQ_STATUS_T ++vchiq_platform_init_state(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS; ++ state->platform_state = kzalloc(sizeof(VCHIQ_2835_ARM_STATE_T), GFP_KERNEL); ++ ((VCHIQ_2835_ARM_STATE_T*)state->platform_state)->inited = 1; ++ status = vchiq_arm_init_state(state, &((VCHIQ_2835_ARM_STATE_T*)state->platform_state)->arm_state); ++ if(status != VCHIQ_SUCCESS) ++ { ++ ((VCHIQ_2835_ARM_STATE_T*)state->platform_state)->inited = 0; ++ } ++ return status; ++} ++ ++VCHIQ_ARM_STATE_T* ++vchiq_platform_get_arm_state(VCHIQ_STATE_T *state) ++{ ++ if(!((VCHIQ_2835_ARM_STATE_T*)state->platform_state)->inited) ++ { ++ BUG(); ++ } ++ return &((VCHIQ_2835_ARM_STATE_T*)state->platform_state)->arm_state; ++} ++ ++void ++remote_event_signal(REMOTE_EVENT_T *event) ++{ ++ wmb(); ++ ++ event->fired = 1; ++ ++ dsb(); /* data barrier operation */ ++ ++ if (event->armed) ++ writel(0, g_regs + BELL2); /* trigger vc interrupt */ ++} ++ ++int ++vchiq_copy_from_user(void *dst, const void *src, int size) ++{ ++ if ((uint32_t)src < TASK_SIZE) { ++ return copy_from_user(dst, src, size); ++ } else { ++ memcpy(dst, src, size); ++ return 0; ++ } ++} ++ ++VCHIQ_STATUS_T ++vchiq_prepare_bulk_data(VCHIQ_BULK_T *bulk, VCHI_MEM_HANDLE_T memhandle, ++ void *offset, int size, int dir) ++{ ++ PAGELIST_T *pagelist; ++ int ret; ++ ++ WARN_ON(memhandle != VCHI_MEM_HANDLE_INVALID); ++ ++ ret = create_pagelist((char __user *)offset, size, ++ (dir == VCHIQ_BULK_RECEIVE) ++ ? PAGELIST_READ ++ : PAGELIST_WRITE, ++ current, ++ &pagelist); ++ if (ret != 0) ++ return VCHIQ_ERROR; ++ ++ bulk->handle = memhandle; ++ bulk->data = VCHIQ_ARM_ADDRESS(pagelist); ++ ++ /* Store the pagelist address in remote_data, which isn't used by the ++ slave. */ ++ bulk->remote_data = pagelist; ++ ++ return VCHIQ_SUCCESS; ++} ++ ++void ++vchiq_complete_bulk(VCHIQ_BULK_T *bulk) ++{ ++ if (bulk && bulk->remote_data && bulk->actual) ++ free_pagelist((PAGELIST_T *)bulk->remote_data, bulk->actual); ++} ++ ++void ++vchiq_transfer_bulk(VCHIQ_BULK_T *bulk) ++{ ++ /* ++ * This should only be called on the master (VideoCore) side, but ++ * provide an implementation to avoid the need for ifdefery. ++ */ ++ BUG(); ++} ++ ++void ++vchiq_dump_platform_state(void *dump_context) ++{ ++ char buf[80]; ++ int len; ++ len = snprintf(buf, sizeof(buf), ++ " Platform: 2835 (VC master)"); ++ vchiq_dump(dump_context, buf, len + 1); ++} ++ ++VCHIQ_STATUS_T ++vchiq_platform_suspend(VCHIQ_STATE_T *state) ++{ ++ return VCHIQ_ERROR; ++} ++ ++VCHIQ_STATUS_T ++vchiq_platform_resume(VCHIQ_STATE_T *state) ++{ ++ return VCHIQ_SUCCESS; ++} ++ ++void ++vchiq_platform_paused(VCHIQ_STATE_T *state) ++{ ++} ++ ++void ++vchiq_platform_resumed(VCHIQ_STATE_T *state) ++{ ++} ++ ++int ++vchiq_platform_videocore_wanted(VCHIQ_STATE_T* state) ++{ ++ return 1; // autosuspend not supported - videocore always wanted ++} ++ ++int ++vchiq_platform_use_suspend_timer(void) ++{ ++ return 0; ++} ++void ++vchiq_dump_platform_use_state(VCHIQ_STATE_T *state) ++{ ++ vchiq_log_info(vchiq_arm_log_level, "Suspend timer not in use"); ++} ++void ++vchiq_platform_handle_timeout(VCHIQ_STATE_T *state) ++{ ++ (void)state; ++} ++/* ++ * Local functions ++ */ ++ ++static irqreturn_t ++vchiq_doorbell_irq(int irq, void *dev_id) ++{ ++ VCHIQ_STATE_T *state = dev_id; ++ irqreturn_t ret = IRQ_NONE; ++ unsigned int status; ++ ++ /* Read (and clear) the doorbell */ ++ status = readl(g_regs + BELL0); ++ ++ if (status & 0x4) { /* Was the doorbell rung? */ ++ remote_event_pollall(state); ++ ret = IRQ_HANDLED; ++ } ++ ++ return ret; ++} ++ ++/* There is a potential problem with partial cache lines (pages?) ++** at the ends of the block when reading. If the CPU accessed anything in ++** the same line (page?) then it may have pulled old data into the cache, ++** obscuring the new data underneath. We can solve this by transferring the ++** partial cache lines separately, and allowing the ARM to copy into the ++** cached area. ++ ++** N.B. This implementation plays slightly fast and loose with the Linux ++** driver programming rules, e.g. its use of dmac_map_area instead of ++** dma_map_single, but it isn't a multi-platform driver and it benefits ++** from increased speed as a result. ++*/ ++ ++static int ++create_pagelist(char __user *buf, size_t count, unsigned short type, ++ struct task_struct *task, PAGELIST_T ** ppagelist) ++{ ++ PAGELIST_T *pagelist; ++ struct page **pages; ++ unsigned long *addrs; ++ unsigned int num_pages, offset, i; ++ char *addr, *base_addr, *next_addr; ++ int run, addridx, actual_pages; ++ unsigned long *need_release; ++ ++ offset = (unsigned int)buf & (PAGE_SIZE - 1); ++ num_pages = (count + offset + PAGE_SIZE - 1) / PAGE_SIZE; ++ ++ *ppagelist = NULL; ++ ++ /* Allocate enough storage to hold the page pointers and the page ++ ** list ++ */ ++ pagelist = kmalloc(sizeof(PAGELIST_T) + ++ (num_pages * sizeof(unsigned long)) + ++ sizeof(unsigned long) + ++ (num_pages * sizeof(pages[0])), ++ GFP_KERNEL); ++ ++ vchiq_log_trace(vchiq_arm_log_level, ++ "create_pagelist - %x", (unsigned int)pagelist); ++ if (!pagelist) ++ return -ENOMEM; ++ ++ addrs = pagelist->addrs; ++ need_release = (unsigned long *)(addrs + num_pages); ++ pages = (struct page **)(addrs + num_pages + 1); ++ ++ if (is_vmalloc_addr(buf)) { ++ int dir = (type == PAGELIST_WRITE) ? ++ DMA_TO_DEVICE : DMA_FROM_DEVICE; ++ unsigned long length = count; ++ unsigned int off = offset; ++ ++ for (actual_pages = 0; actual_pages < num_pages; ++ actual_pages++) { ++ struct page *pg = vmalloc_to_page(buf + (actual_pages * ++ PAGE_SIZE)); ++ size_t bytes = PAGE_SIZE - off; ++ ++ if (bytes > length) ++ bytes = length; ++ pages[actual_pages] = pg; ++ dmac_map_area(page_address(pg) + off, bytes, dir); ++ length -= bytes; ++ off = 0; ++ } ++ *need_release = 0; /* do not try and release vmalloc pages */ ++ } else { ++ down_read(&task->mm->mmap_sem); ++ actual_pages = get_user_pages(task, task->mm, ++ (unsigned long)buf & ~(PAGE_SIZE - 1), ++ num_pages, ++ (type == PAGELIST_READ) /*Write */ , ++ 0 /*Force */ , ++ pages, ++ NULL /*vmas */); ++ up_read(&task->mm->mmap_sem); ++ ++ if (actual_pages != num_pages) { ++ vchiq_log_info(vchiq_arm_log_level, ++ "create_pagelist - only %d/%d pages locked", ++ actual_pages, ++ num_pages); ++ ++ /* This is probably due to the process being killed */ ++ while (actual_pages > 0) ++ { ++ actual_pages--; ++ page_cache_release(pages[actual_pages]); ++ } ++ kfree(pagelist); ++ if (actual_pages == 0) ++ actual_pages = -ENOMEM; ++ return actual_pages; ++ } ++ *need_release = 1; /* release user pages */ ++ } ++ ++ pagelist->length = count; ++ pagelist->type = type; ++ pagelist->offset = offset; ++ ++ /* Group the pages into runs of contiguous pages */ ++ ++ base_addr = VCHIQ_ARM_ADDRESS(page_address(pages[0])); ++ next_addr = base_addr + PAGE_SIZE; ++ addridx = 0; ++ run = 0; ++ ++ for (i = 1; i < num_pages; i++) { ++ addr = VCHIQ_ARM_ADDRESS(page_address(pages[i])); ++ if ((addr == next_addr) && (run < (PAGE_SIZE - 1))) { ++ next_addr += PAGE_SIZE; ++ run++; ++ } else { ++ addrs[addridx] = (unsigned long)base_addr + run; ++ addridx++; ++ base_addr = addr; ++ next_addr = addr + PAGE_SIZE; ++ run = 0; ++ } ++ } ++ ++ addrs[addridx] = (unsigned long)base_addr + run; ++ addridx++; ++ ++ /* Partial cache lines (fragments) require special measures */ ++ if ((type == PAGELIST_READ) && ++ ((pagelist->offset & (g_cache_line_size - 1)) || ++ ((pagelist->offset + pagelist->length) & ++ (g_cache_line_size - 1)))) { ++ char *fragments; ++ ++ if (down_interruptible(&g_free_fragments_sema) != 0) { ++ kfree(pagelist); ++ return -EINTR; ++ } ++ ++ WARN_ON(g_free_fragments == NULL); ++ ++ down(&g_free_fragments_mutex); ++ fragments = g_free_fragments; ++ WARN_ON(fragments == NULL); ++ g_free_fragments = *(char **) g_free_fragments; ++ up(&g_free_fragments_mutex); ++ pagelist->type = PAGELIST_READ_WITH_FRAGMENTS + ++ (fragments - g_fragments_base) / g_fragments_size; ++ } ++ ++ dmac_flush_range(pagelist, addrs + num_pages); ++ ++ *ppagelist = pagelist; ++ ++ return 0; ++} ++ ++static void ++free_pagelist(PAGELIST_T *pagelist, int actual) ++{ ++ unsigned long *need_release; ++ struct page **pages; ++ unsigned int num_pages, i; ++ ++ vchiq_log_trace(vchiq_arm_log_level, ++ "free_pagelist - %x, %d", (unsigned int)pagelist, actual); ++ ++ num_pages = ++ (pagelist->length + pagelist->offset + PAGE_SIZE - 1) / ++ PAGE_SIZE; ++ ++ need_release = (unsigned long *)(pagelist->addrs + num_pages); ++ pages = (struct page **)(pagelist->addrs + num_pages + 1); ++ ++ /* Deal with any partial cache lines (fragments) */ ++ if (pagelist->type >= PAGELIST_READ_WITH_FRAGMENTS) { ++ char *fragments = g_fragments_base + ++ (pagelist->type - PAGELIST_READ_WITH_FRAGMENTS) * ++ g_fragments_size; ++ int head_bytes, tail_bytes; ++ head_bytes = (g_cache_line_size - pagelist->offset) & ++ (g_cache_line_size - 1); ++ tail_bytes = (pagelist->offset + actual) & ++ (g_cache_line_size - 1); ++ ++ if ((actual >= 0) && (head_bytes != 0)) { ++ if (head_bytes > actual) ++ head_bytes = actual; ++ ++ memcpy((char *)page_address(pages[0]) + ++ pagelist->offset, ++ fragments, ++ head_bytes); ++ } ++ if ((actual >= 0) && (head_bytes < actual) && ++ (tail_bytes != 0)) { ++ memcpy((char *)page_address(pages[num_pages - 1]) + ++ ((pagelist->offset + actual) & ++ (PAGE_SIZE - 1) & ~(g_cache_line_size - 1)), ++ fragments + g_cache_line_size, ++ tail_bytes); ++ } ++ ++ down(&g_free_fragments_mutex); ++ *(char **)fragments = g_free_fragments; ++ g_free_fragments = fragments; ++ up(&g_free_fragments_mutex); ++ up(&g_free_fragments_sema); ++ } ++ ++ if (*need_release) { ++ unsigned int length = pagelist->length; ++ unsigned int offset = pagelist->offset; ++ ++ for (i = 0; i < num_pages; i++) { ++ struct page *pg = pages[i]; ++ ++ if (pagelist->type != PAGELIST_WRITE) { ++ unsigned int bytes = PAGE_SIZE - offset; ++ ++ if (bytes > length) ++ bytes = length; ++ dmac_unmap_area(page_address(pg) + offset, ++ bytes, DMA_FROM_DEVICE); ++ length -= bytes; ++ offset = 0; ++ set_page_dirty(pg); ++ } ++ page_cache_release(pg); ++ } ++ } ++ ++ kfree(pagelist); ++} +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_arm.c +@@ -0,0 +1,2903 @@ ++/** ++ * Copyright (c) 2014 Raspberry Pi (Trading) Ltd. All rights reserved. ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#include <linux/kernel.h> ++#include <linux/module.h> ++#include <linux/types.h> ++#include <linux/errno.h> ++#include <linux/cdev.h> ++#include <linux/fs.h> ++#include <linux/device.h> ++#include <linux/mm.h> ++#include <linux/highmem.h> ++#include <linux/pagemap.h> ++#include <linux/bug.h> ++#include <linux/semaphore.h> ++#include <linux/list.h> ++#include <linux/of.h> ++#include <linux/platform_device.h> ++#include <soc/bcm2835/raspberrypi-firmware.h> ++ ++#include "vchiq_core.h" ++#include "vchiq_ioctl.h" ++#include "vchiq_arm.h" ++#include "vchiq_debugfs.h" ++#include "vchiq_killable.h" ++ ++#define DEVICE_NAME "vchiq" ++ ++/* Override the default prefix, which would be vchiq_arm (from the filename) */ ++#undef MODULE_PARAM_PREFIX ++#define MODULE_PARAM_PREFIX DEVICE_NAME "." ++ ++#define VCHIQ_MINOR 0 ++ ++/* Some per-instance constants */ ++#define MAX_COMPLETIONS 16 ++#define MAX_SERVICES 64 ++#define MAX_ELEMENTS 8 ++#define MSG_QUEUE_SIZE 64 ++ ++#define KEEPALIVE_VER 1 ++#define KEEPALIVE_VER_MIN KEEPALIVE_VER ++ ++/* Run time control of log level, based on KERN_XXX level. */ ++int vchiq_arm_log_level = VCHIQ_LOG_DEFAULT; ++int vchiq_susp_log_level = VCHIQ_LOG_ERROR; ++ ++#define SUSPEND_TIMER_TIMEOUT_MS 100 ++#define SUSPEND_RETRY_TIMER_TIMEOUT_MS 1000 ++ ++#define VC_SUSPEND_NUM_OFFSET 3 /* number of values before idle which are -ve */ ++static const char *const suspend_state_names[] = { ++ "VC_SUSPEND_FORCE_CANCELED", ++ "VC_SUSPEND_REJECTED", ++ "VC_SUSPEND_FAILED", ++ "VC_SUSPEND_IDLE", ++ "VC_SUSPEND_REQUESTED", ++ "VC_SUSPEND_IN_PROGRESS", ++ "VC_SUSPEND_SUSPENDED" ++}; ++#define VC_RESUME_NUM_OFFSET 1 /* number of values before idle which are -ve */ ++static const char *const resume_state_names[] = { ++ "VC_RESUME_FAILED", ++ "VC_RESUME_IDLE", ++ "VC_RESUME_REQUESTED", ++ "VC_RESUME_IN_PROGRESS", ++ "VC_RESUME_RESUMED" ++}; ++/* The number of times we allow force suspend to timeout before actually ++** _forcing_ suspend. This is to cater for SW which fails to release vchiq ++** correctly - we don't want to prevent ARM suspend indefinitely in this case. ++*/ ++#define FORCE_SUSPEND_FAIL_MAX 8 ++ ++/* The time in ms allowed for videocore to go idle when force suspend has been ++ * requested */ ++#define FORCE_SUSPEND_TIMEOUT_MS 200 ++ ++ ++static void suspend_timer_callback(unsigned long context); ++ ++ ++typedef struct user_service_struct { ++ VCHIQ_SERVICE_T *service; ++ void *userdata; ++ VCHIQ_INSTANCE_T instance; ++ char is_vchi; ++ char dequeue_pending; ++ char close_pending; ++ int message_available_pos; ++ int msg_insert; ++ int msg_remove; ++ struct semaphore insert_event; ++ struct semaphore remove_event; ++ struct semaphore close_event; ++ VCHIQ_HEADER_T * msg_queue[MSG_QUEUE_SIZE]; ++} USER_SERVICE_T; ++ ++struct bulk_waiter_node { ++ struct bulk_waiter bulk_waiter; ++ int pid; ++ struct list_head list; ++}; ++ ++struct vchiq_instance_struct { ++ VCHIQ_STATE_T *state; ++ VCHIQ_COMPLETION_DATA_T completions[MAX_COMPLETIONS]; ++ int completion_insert; ++ int completion_remove; ++ struct semaphore insert_event; ++ struct semaphore remove_event; ++ struct mutex completion_mutex; ++ ++ int connected; ++ int closing; ++ int pid; ++ int mark; ++ int use_close_delivered; ++ int trace; ++ ++ struct list_head bulk_waiter_list; ++ struct mutex bulk_waiter_list_mutex; ++ ++ VCHIQ_DEBUGFS_NODE_T debugfs_node; ++}; ++ ++typedef struct dump_context_struct { ++ char __user *buf; ++ size_t actual; ++ size_t space; ++ loff_t offset; ++} DUMP_CONTEXT_T; ++ ++static struct cdev vchiq_cdev; ++static dev_t vchiq_devid; ++static VCHIQ_STATE_T g_state; ++static struct class *vchiq_class; ++static struct device *vchiq_dev; ++static DEFINE_SPINLOCK(msg_queue_spinlock); ++ ++static const char *const ioctl_names[] = { ++ "CONNECT", ++ "SHUTDOWN", ++ "CREATE_SERVICE", ++ "REMOVE_SERVICE", ++ "QUEUE_MESSAGE", ++ "QUEUE_BULK_TRANSMIT", ++ "QUEUE_BULK_RECEIVE", ++ "AWAIT_COMPLETION", ++ "DEQUEUE_MESSAGE", ++ "GET_CLIENT_ID", ++ "GET_CONFIG", ++ "CLOSE_SERVICE", ++ "USE_SERVICE", ++ "RELEASE_SERVICE", ++ "SET_SERVICE_OPTION", ++ "DUMP_PHYS_MEM", ++ "LIB_VERSION", ++ "CLOSE_DELIVERED" ++}; ++ ++vchiq_static_assert((sizeof(ioctl_names)/sizeof(ioctl_names[0])) == ++ (VCHIQ_IOC_MAX + 1)); ++ ++static void ++dump_phys_mem(void *virt_addr, uint32_t num_bytes); ++ ++/**************************************************************************** ++* ++* add_completion ++* ++***************************************************************************/ ++ ++static VCHIQ_STATUS_T ++add_completion(VCHIQ_INSTANCE_T instance, VCHIQ_REASON_T reason, ++ VCHIQ_HEADER_T *header, USER_SERVICE_T *user_service, ++ void *bulk_userdata) ++{ ++ VCHIQ_COMPLETION_DATA_T *completion; ++ DEBUG_INITIALISE(g_state.local) ++ ++ while (instance->completion_insert == ++ (instance->completion_remove + MAX_COMPLETIONS)) { ++ /* Out of space - wait for the client */ ++ DEBUG_TRACE(SERVICE_CALLBACK_LINE); ++ vchiq_log_trace(vchiq_arm_log_level, ++ "add_completion - completion queue full"); ++ DEBUG_COUNT(COMPLETION_QUEUE_FULL_COUNT); ++ if (down_interruptible(&instance->remove_event) != 0) { ++ vchiq_log_info(vchiq_arm_log_level, ++ "service_callback interrupted"); ++ return VCHIQ_RETRY; ++ } else if (instance->closing) { ++ vchiq_log_info(vchiq_arm_log_level, ++ "service_callback closing"); ++ return VCHIQ_ERROR; ++ } ++ DEBUG_TRACE(SERVICE_CALLBACK_LINE); ++ } ++ ++ completion = ++ &instance->completions[instance->completion_insert & ++ (MAX_COMPLETIONS - 1)]; ++ ++ completion->header = header; ++ completion->reason = reason; ++ /* N.B. service_userdata is updated while processing AWAIT_COMPLETION */ ++ completion->service_userdata = user_service->service; ++ completion->bulk_userdata = bulk_userdata; ++ ++ if (reason == VCHIQ_SERVICE_CLOSED) { ++ /* Take an extra reference, to be held until ++ this CLOSED notification is delivered. */ ++ lock_service(user_service->service); ++ if (instance->use_close_delivered) ++ user_service->close_pending = 1; ++ } ++ ++ /* A write barrier is needed here to ensure that the entire completion ++ record is written out before the insert point. */ ++ wmb(); ++ ++ if (reason == VCHIQ_MESSAGE_AVAILABLE) ++ user_service->message_available_pos = ++ instance->completion_insert; ++ instance->completion_insert++; ++ ++ up(&instance->insert_event); ++ ++ return VCHIQ_SUCCESS; ++} ++ ++/**************************************************************************** ++* ++* service_callback ++* ++***************************************************************************/ ++ ++static VCHIQ_STATUS_T ++service_callback(VCHIQ_REASON_T reason, VCHIQ_HEADER_T *header, ++ VCHIQ_SERVICE_HANDLE_T handle, void *bulk_userdata) ++{ ++ /* How do we ensure the callback goes to the right client? ++ ** The service_user data points to a USER_SERVICE_T record containing ++ ** the original callback and the user state structure, which contains a ++ ** circular buffer for completion records. ++ */ ++ USER_SERVICE_T *user_service; ++ VCHIQ_SERVICE_T *service; ++ VCHIQ_INSTANCE_T instance; ++ DEBUG_INITIALISE(g_state.local) ++ ++ DEBUG_TRACE(SERVICE_CALLBACK_LINE); ++ ++ service = handle_to_service(handle); ++ BUG_ON(!service); ++ user_service = (USER_SERVICE_T *)service->base.userdata; ++ instance = user_service->instance; ++ ++ if (!instance || instance->closing) ++ return VCHIQ_SUCCESS; ++ ++ vchiq_log_trace(vchiq_arm_log_level, ++ "service_callback - service %lx(%d,%p), reason %d, header %lx, " ++ "instance %lx, bulk_userdata %lx", ++ (unsigned long)user_service, ++ service->localport, user_service->userdata, ++ reason, (unsigned long)header, ++ (unsigned long)instance, (unsigned long)bulk_userdata); ++ ++ if (header && user_service->is_vchi) { ++ spin_lock(&msg_queue_spinlock); ++ while (user_service->msg_insert == ++ (user_service->msg_remove + MSG_QUEUE_SIZE)) { ++ spin_unlock(&msg_queue_spinlock); ++ DEBUG_TRACE(SERVICE_CALLBACK_LINE); ++ DEBUG_COUNT(MSG_QUEUE_FULL_COUNT); ++ vchiq_log_trace(vchiq_arm_log_level, ++ "service_callback - msg queue full"); ++ /* If there is no MESSAGE_AVAILABLE in the completion ++ ** queue, add one ++ */ ++ if ((user_service->message_available_pos - ++ instance->completion_remove) < 0) { ++ VCHIQ_STATUS_T status; ++ vchiq_log_info(vchiq_arm_log_level, ++ "Inserting extra MESSAGE_AVAILABLE"); ++ DEBUG_TRACE(SERVICE_CALLBACK_LINE); ++ status = add_completion(instance, reason, ++ NULL, user_service, bulk_userdata); ++ if (status != VCHIQ_SUCCESS) { ++ DEBUG_TRACE(SERVICE_CALLBACK_LINE); ++ return status; ++ } ++ } ++ ++ DEBUG_TRACE(SERVICE_CALLBACK_LINE); ++ if (down_interruptible(&user_service->remove_event) ++ != 0) { ++ vchiq_log_info(vchiq_arm_log_level, ++ "service_callback interrupted"); ++ DEBUG_TRACE(SERVICE_CALLBACK_LINE); ++ return VCHIQ_RETRY; ++ } else if (instance->closing) { ++ vchiq_log_info(vchiq_arm_log_level, ++ "service_callback closing"); ++ DEBUG_TRACE(SERVICE_CALLBACK_LINE); ++ return VCHIQ_ERROR; ++ } ++ DEBUG_TRACE(SERVICE_CALLBACK_LINE); ++ spin_lock(&msg_queue_spinlock); ++ } ++ ++ user_service->msg_queue[user_service->msg_insert & ++ (MSG_QUEUE_SIZE - 1)] = header; ++ user_service->msg_insert++; ++ spin_unlock(&msg_queue_spinlock); ++ ++ up(&user_service->insert_event); ++ ++ /* If there is a thread waiting in DEQUEUE_MESSAGE, or if ++ ** there is a MESSAGE_AVAILABLE in the completion queue then ++ ** bypass the completion queue. ++ */ ++ if (((user_service->message_available_pos - ++ instance->completion_remove) >= 0) || ++ user_service->dequeue_pending) { ++ DEBUG_TRACE(SERVICE_CALLBACK_LINE); ++ user_service->dequeue_pending = 0; ++ return VCHIQ_SUCCESS; ++ } ++ ++ header = NULL; ++ } ++ DEBUG_TRACE(SERVICE_CALLBACK_LINE); ++ ++ return add_completion(instance, reason, header, user_service, ++ bulk_userdata); ++} ++ ++/**************************************************************************** ++* ++* user_service_free ++* ++***************************************************************************/ ++static void ++user_service_free(void *userdata) ++{ ++ kfree(userdata); ++} ++ ++/**************************************************************************** ++* ++* close_delivered ++* ++***************************************************************************/ ++static void close_delivered(USER_SERVICE_T *user_service) ++{ ++ vchiq_log_info(vchiq_arm_log_level, ++ "close_delivered(handle=%x)", ++ user_service->service->handle); ++ ++ if (user_service->close_pending) { ++ /* Allow the underlying service to be culled */ ++ unlock_service(user_service->service); ++ ++ /* Wake the user-thread blocked in close_ or remove_service */ ++ up(&user_service->close_event); ++ ++ user_service->close_pending = 0; ++ } ++} ++ ++/**************************************************************************** ++* ++* vchiq_ioctl ++* ++***************************************************************************/ ++static long ++vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) ++{ ++ VCHIQ_INSTANCE_T instance = file->private_data; ++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS; ++ VCHIQ_SERVICE_T *service = NULL; ++ long ret = 0; ++ int i, rc; ++ DEBUG_INITIALISE(g_state.local) ++ ++ vchiq_log_trace(vchiq_arm_log_level, ++ "vchiq_ioctl - instance %x, cmd %s, arg %lx", ++ (unsigned int)instance, ++ ((_IOC_TYPE(cmd) == VCHIQ_IOC_MAGIC) && ++ (_IOC_NR(cmd) <= VCHIQ_IOC_MAX)) ? ++ ioctl_names[_IOC_NR(cmd)] : "<invalid>", arg); ++ ++ switch (cmd) { ++ case VCHIQ_IOC_SHUTDOWN: ++ if (!instance->connected) ++ break; ++ ++ /* Remove all services */ ++ i = 0; ++ while ((service = next_service_by_instance(instance->state, ++ instance, &i)) != NULL) { ++ status = vchiq_remove_service(service->handle); ++ unlock_service(service); ++ if (status != VCHIQ_SUCCESS) ++ break; ++ } ++ service = NULL; ++ ++ if (status == VCHIQ_SUCCESS) { ++ /* Wake the completion thread and ask it to exit */ ++ instance->closing = 1; ++ up(&instance->insert_event); ++ } ++ ++ break; ++ ++ case VCHIQ_IOC_CONNECT: ++ if (instance->connected) { ++ ret = -EINVAL; ++ break; ++ } ++ rc = mutex_lock_interruptible(&instance->state->mutex); ++ if (rc != 0) { ++ vchiq_log_error(vchiq_arm_log_level, ++ "vchiq: connect: could not lock mutex for " ++ "state %d: %d", ++ instance->state->id, rc); ++ ret = -EINTR; ++ break; ++ } ++ status = vchiq_connect_internal(instance->state, instance); ++ mutex_unlock(&instance->state->mutex); ++ ++ if (status == VCHIQ_SUCCESS) ++ instance->connected = 1; ++ else ++ vchiq_log_error(vchiq_arm_log_level, ++ "vchiq: could not connect: %d", status); ++ break; ++ ++ case VCHIQ_IOC_CREATE_SERVICE: { ++ VCHIQ_CREATE_SERVICE_T args; ++ USER_SERVICE_T *user_service = NULL; ++ void *userdata; ++ int srvstate; ++ ++ if (copy_from_user ++ (&args, (const void __user *)arg, ++ sizeof(args)) != 0) { ++ ret = -EFAULT; ++ break; ++ } ++ ++ user_service = kmalloc(sizeof(USER_SERVICE_T), GFP_KERNEL); ++ if (!user_service) { ++ ret = -ENOMEM; ++ break; ++ } ++ ++ if (args.is_open) { ++ if (!instance->connected) { ++ ret = -ENOTCONN; ++ kfree(user_service); ++ break; ++ } ++ srvstate = VCHIQ_SRVSTATE_OPENING; ++ } else { ++ srvstate = ++ instance->connected ? ++ VCHIQ_SRVSTATE_LISTENING : ++ VCHIQ_SRVSTATE_HIDDEN; ++ } ++ ++ userdata = args.params.userdata; ++ args.params.callback = service_callback; ++ args.params.userdata = user_service; ++ service = vchiq_add_service_internal( ++ instance->state, ++ &args.params, srvstate, ++ instance, user_service_free); ++ ++ if (service != NULL) { ++ user_service->service = service; ++ user_service->userdata = userdata; ++ user_service->instance = instance; ++ user_service->is_vchi = (args.is_vchi != 0); ++ user_service->dequeue_pending = 0; ++ user_service->close_pending = 0; ++ user_service->message_available_pos = ++ instance->completion_remove - 1; ++ user_service->msg_insert = 0; ++ user_service->msg_remove = 0; ++ sema_init(&user_service->insert_event, 0); ++ sema_init(&user_service->remove_event, 0); ++ sema_init(&user_service->close_event, 0); ++ ++ if (args.is_open) { ++ status = vchiq_open_service_internal ++ (service, instance->pid); ++ if (status != VCHIQ_SUCCESS) { ++ vchiq_remove_service(service->handle); ++ service = NULL; ++ ret = (status == VCHIQ_RETRY) ? ++ -EINTR : -EIO; ++ break; ++ } ++ } ++ ++ if (copy_to_user((void __user *) ++ &(((VCHIQ_CREATE_SERVICE_T __user *) ++ arg)->handle), ++ (const void *)&service->handle, ++ sizeof(service->handle)) != 0) { ++ ret = -EFAULT; ++ vchiq_remove_service(service->handle); ++ } ++ ++ service = NULL; ++ } else { ++ ret = -EEXIST; ++ kfree(user_service); ++ } ++ } break; ++ ++ case VCHIQ_IOC_CLOSE_SERVICE: { ++ VCHIQ_SERVICE_HANDLE_T handle = (VCHIQ_SERVICE_HANDLE_T)arg; ++ ++ service = find_service_for_instance(instance, handle); ++ if (service != NULL) { ++ USER_SERVICE_T *user_service = ++ (USER_SERVICE_T *)service->base.userdata; ++ /* close_pending is false on first entry, and when the ++ wait in vchiq_close_service has been interrupted. */ ++ if (!user_service->close_pending) { ++ status = vchiq_close_service(service->handle); ++ if (status != VCHIQ_SUCCESS) ++ break; ++ } ++ ++ /* close_pending is true once the underlying service ++ has been closed until the client library calls the ++ CLOSE_DELIVERED ioctl, signalling close_event. */ ++ if (user_service->close_pending && ++ down_interruptible(&user_service->close_event)) ++ status = VCHIQ_RETRY; ++ } ++ else ++ ret = -EINVAL; ++ } break; ++ ++ case VCHIQ_IOC_REMOVE_SERVICE: { ++ VCHIQ_SERVICE_HANDLE_T handle = (VCHIQ_SERVICE_HANDLE_T)arg; ++ ++ service = find_service_for_instance(instance, handle); ++ if (service != NULL) { ++ USER_SERVICE_T *user_service = ++ (USER_SERVICE_T *)service->base.userdata; ++ /* close_pending is false on first entry, and when the ++ wait in vchiq_close_service has been interrupted. */ ++ if (!user_service->close_pending) { ++ status = vchiq_remove_service(service->handle); ++ if (status != VCHIQ_SUCCESS) ++ break; ++ } ++ ++ /* close_pending is true once the underlying service ++ has been closed until the client library calls the ++ CLOSE_DELIVERED ioctl, signalling close_event. */ ++ if (user_service->close_pending && ++ down_interruptible(&user_service->close_event)) ++ status = VCHIQ_RETRY; ++ } ++ else ++ ret = -EINVAL; ++ } break; ++ ++ case VCHIQ_IOC_USE_SERVICE: ++ case VCHIQ_IOC_RELEASE_SERVICE: { ++ VCHIQ_SERVICE_HANDLE_T handle = (VCHIQ_SERVICE_HANDLE_T)arg; ++ ++ service = find_service_for_instance(instance, handle); ++ if (service != NULL) { ++ status = (cmd == VCHIQ_IOC_USE_SERVICE) ? ++ vchiq_use_service_internal(service) : ++ vchiq_release_service_internal(service); ++ if (status != VCHIQ_SUCCESS) { ++ vchiq_log_error(vchiq_susp_log_level, ++ "%s: cmd %s returned error %d for " ++ "service %c%c%c%c:%03d", ++ __func__, ++ (cmd == VCHIQ_IOC_USE_SERVICE) ? ++ "VCHIQ_IOC_USE_SERVICE" : ++ "VCHIQ_IOC_RELEASE_SERVICE", ++ status, ++ VCHIQ_FOURCC_AS_4CHARS( ++ service->base.fourcc), ++ service->client_id); ++ ret = -EINVAL; ++ } ++ } else ++ ret = -EINVAL; ++ } break; ++ ++ case VCHIQ_IOC_QUEUE_MESSAGE: { ++ VCHIQ_QUEUE_MESSAGE_T args; ++ if (copy_from_user ++ (&args, (const void __user *)arg, ++ sizeof(args)) != 0) { ++ ret = -EFAULT; ++ break; ++ } ++ ++ service = find_service_for_instance(instance, args.handle); ++ ++ if ((service != NULL) && (args.count <= MAX_ELEMENTS)) { ++ /* Copy elements into kernel space */ ++ VCHIQ_ELEMENT_T elements[MAX_ELEMENTS]; ++ if (copy_from_user(elements, args.elements, ++ args.count * sizeof(VCHIQ_ELEMENT_T)) == 0) ++ status = vchiq_queue_message ++ (args.handle, ++ elements, args.count); ++ else ++ ret = -EFAULT; ++ } else { ++ ret = -EINVAL; ++ } ++ } break; ++ ++ case VCHIQ_IOC_QUEUE_BULK_TRANSMIT: ++ case VCHIQ_IOC_QUEUE_BULK_RECEIVE: { ++ VCHIQ_QUEUE_BULK_TRANSFER_T args; ++ struct bulk_waiter_node *waiter = NULL; ++ VCHIQ_BULK_DIR_T dir = ++ (cmd == VCHIQ_IOC_QUEUE_BULK_TRANSMIT) ? ++ VCHIQ_BULK_TRANSMIT : VCHIQ_BULK_RECEIVE; ++ ++ if (copy_from_user ++ (&args, (const void __user *)arg, ++ sizeof(args)) != 0) { ++ ret = -EFAULT; ++ break; ++ } ++ ++ service = find_service_for_instance(instance, args.handle); ++ if (!service) { ++ ret = -EINVAL; ++ break; ++ } ++ ++ if (args.mode == VCHIQ_BULK_MODE_BLOCKING) { ++ waiter = kzalloc(sizeof(struct bulk_waiter_node), ++ GFP_KERNEL); ++ if (!waiter) { ++ ret = -ENOMEM; ++ break; ++ } ++ args.userdata = &waiter->bulk_waiter; ++ } else if (args.mode == VCHIQ_BULK_MODE_WAITING) { ++ struct list_head *pos; ++ mutex_lock(&instance->bulk_waiter_list_mutex); ++ list_for_each(pos, &instance->bulk_waiter_list) { ++ if (list_entry(pos, struct bulk_waiter_node, ++ list)->pid == current->pid) { ++ waiter = list_entry(pos, ++ struct bulk_waiter_node, ++ list); ++ list_del(pos); ++ break; ++ } ++ ++ } ++ mutex_unlock(&instance->bulk_waiter_list_mutex); ++ if (!waiter) { ++ vchiq_log_error(vchiq_arm_log_level, ++ "no bulk_waiter found for pid %d", ++ current->pid); ++ ret = -ESRCH; ++ break; ++ } ++ vchiq_log_info(vchiq_arm_log_level, ++ "found bulk_waiter %x for pid %d", ++ (unsigned int)waiter, current->pid); ++ args.userdata = &waiter->bulk_waiter; ++ } ++ status = vchiq_bulk_transfer ++ (args.handle, ++ VCHI_MEM_HANDLE_INVALID, ++ args.data, args.size, ++ args.userdata, args.mode, ++ dir); ++ if (!waiter) ++ break; ++ if ((status != VCHIQ_RETRY) || fatal_signal_pending(current) || ++ !waiter->bulk_waiter.bulk) { ++ if (waiter->bulk_waiter.bulk) { ++ /* Cancel the signal when the transfer ++ ** completes. */ ++ spin_lock(&bulk_waiter_spinlock); ++ waiter->bulk_waiter.bulk->userdata = NULL; ++ spin_unlock(&bulk_waiter_spinlock); ++ } ++ kfree(waiter); ++ } else { ++ const VCHIQ_BULK_MODE_T mode_waiting = ++ VCHIQ_BULK_MODE_WAITING; ++ waiter->pid = current->pid; ++ mutex_lock(&instance->bulk_waiter_list_mutex); ++ list_add(&waiter->list, &instance->bulk_waiter_list); ++ mutex_unlock(&instance->bulk_waiter_list_mutex); ++ vchiq_log_info(vchiq_arm_log_level, ++ "saved bulk_waiter %x for pid %d", ++ (unsigned int)waiter, current->pid); ++ ++ if (copy_to_user((void __user *) ++ &(((VCHIQ_QUEUE_BULK_TRANSFER_T __user *) ++ arg)->mode), ++ (const void *)&mode_waiting, ++ sizeof(mode_waiting)) != 0) ++ ret = -EFAULT; ++ } ++ } break; ++ ++ case VCHIQ_IOC_AWAIT_COMPLETION: { ++ VCHIQ_AWAIT_COMPLETION_T args; ++ ++ DEBUG_TRACE(AWAIT_COMPLETION_LINE); ++ if (!instance->connected) { ++ ret = -ENOTCONN; ++ break; ++ } ++ ++ if (copy_from_user(&args, (const void __user *)arg, ++ sizeof(args)) != 0) { ++ ret = -EFAULT; ++ break; ++ } ++ ++ mutex_lock(&instance->completion_mutex); ++ ++ DEBUG_TRACE(AWAIT_COMPLETION_LINE); ++ while ((instance->completion_remove == ++ instance->completion_insert) ++ && !instance->closing) { ++ int rc; ++ DEBUG_TRACE(AWAIT_COMPLETION_LINE); ++ mutex_unlock(&instance->completion_mutex); ++ rc = down_interruptible(&instance->insert_event); ++ mutex_lock(&instance->completion_mutex); ++ if (rc != 0) { ++ DEBUG_TRACE(AWAIT_COMPLETION_LINE); ++ vchiq_log_info(vchiq_arm_log_level, ++ "AWAIT_COMPLETION interrupted"); ++ ret = -EINTR; ++ break; ++ } ++ } ++ DEBUG_TRACE(AWAIT_COMPLETION_LINE); ++ ++ /* A read memory barrier is needed to stop prefetch of a stale ++ ** completion record ++ */ ++ rmb(); ++ ++ if (ret == 0) { ++ int msgbufcount = args.msgbufcount; ++ for (ret = 0; ret < args.count; ret++) { ++ VCHIQ_COMPLETION_DATA_T *completion; ++ VCHIQ_SERVICE_T *service; ++ USER_SERVICE_T *user_service; ++ VCHIQ_HEADER_T *header; ++ if (instance->completion_remove == ++ instance->completion_insert) ++ break; ++ completion = &instance->completions[ ++ instance->completion_remove & ++ (MAX_COMPLETIONS - 1)]; ++ ++ service = completion->service_userdata; ++ user_service = service->base.userdata; ++ completion->service_userdata = ++ user_service->userdata; ++ ++ header = completion->header; ++ if (header) { ++ void __user *msgbuf; ++ int msglen; ++ ++ msglen = header->size + ++ sizeof(VCHIQ_HEADER_T); ++ /* This must be a VCHIQ-style service */ ++ if (args.msgbufsize < msglen) { ++ vchiq_log_error( ++ vchiq_arm_log_level, ++ "header %x: msgbufsize" ++ " %x < msglen %x", ++ (unsigned int)header, ++ args.msgbufsize, ++ msglen); ++ WARN(1, "invalid message " ++ "size\n"); ++ if (ret == 0) ++ ret = -EMSGSIZE; ++ break; ++ } ++ if (msgbufcount <= 0) ++ /* Stall here for lack of a ++ ** buffer for the message. */ ++ break; ++ /* Get the pointer from user space */ ++ msgbufcount--; ++ if (copy_from_user(&msgbuf, ++ (const void __user *) ++ &args.msgbufs[msgbufcount], ++ sizeof(msgbuf)) != 0) { ++ if (ret == 0) ++ ret = -EFAULT; ++ break; ++ } ++ ++ /* Copy the message to user space */ ++ if (copy_to_user(msgbuf, header, ++ msglen) != 0) { ++ if (ret == 0) ++ ret = -EFAULT; ++ break; ++ } ++ ++ /* Now it has been copied, the message ++ ** can be released. */ ++ vchiq_release_message(service->handle, ++ header); ++ ++ /* The completion must point to the ++ ** msgbuf. */ ++ completion->header = msgbuf; ++ } ++ ++ if ((completion->reason == ++ VCHIQ_SERVICE_CLOSED) && ++ !instance->use_close_delivered) ++ unlock_service(service); ++ ++ if (copy_to_user((void __user *)( ++ (size_t)args.buf + ++ ret * sizeof(VCHIQ_COMPLETION_DATA_T)), ++ completion, ++ sizeof(VCHIQ_COMPLETION_DATA_T)) != 0) { ++ if (ret == 0) ++ ret = -EFAULT; ++ break; ++ } ++ ++ instance->completion_remove++; ++ } ++ ++ if (msgbufcount != args.msgbufcount) { ++ if (copy_to_user((void __user *) ++ &((VCHIQ_AWAIT_COMPLETION_T *)arg)-> ++ msgbufcount, ++ &msgbufcount, ++ sizeof(msgbufcount)) != 0) { ++ ret = -EFAULT; ++ } ++ } ++ } ++ ++ if (ret != 0) ++ up(&instance->remove_event); ++ mutex_unlock(&instance->completion_mutex); ++ DEBUG_TRACE(AWAIT_COMPLETION_LINE); ++ } break; ++ ++ case VCHIQ_IOC_DEQUEUE_MESSAGE: { ++ VCHIQ_DEQUEUE_MESSAGE_T args; ++ USER_SERVICE_T *user_service; ++ VCHIQ_HEADER_T *header; ++ ++ DEBUG_TRACE(DEQUEUE_MESSAGE_LINE); ++ if (copy_from_user ++ (&args, (const void __user *)arg, ++ sizeof(args)) != 0) { ++ ret = -EFAULT; ++ break; ++ } ++ service = find_service_for_instance(instance, args.handle); ++ if (!service) { ++ ret = -EINVAL; ++ break; ++ } ++ user_service = (USER_SERVICE_T *)service->base.userdata; ++ if (user_service->is_vchi == 0) { ++ ret = -EINVAL; ++ break; ++ } ++ ++ spin_lock(&msg_queue_spinlock); ++ if (user_service->msg_remove == user_service->msg_insert) { ++ if (!args.blocking) { ++ spin_unlock(&msg_queue_spinlock); ++ DEBUG_TRACE(DEQUEUE_MESSAGE_LINE); ++ ret = -EWOULDBLOCK; ++ break; ++ } ++ user_service->dequeue_pending = 1; ++ do { ++ spin_unlock(&msg_queue_spinlock); ++ DEBUG_TRACE(DEQUEUE_MESSAGE_LINE); ++ if (down_interruptible( ++ &user_service->insert_event) != 0) { ++ vchiq_log_info(vchiq_arm_log_level, ++ "DEQUEUE_MESSAGE interrupted"); ++ ret = -EINTR; ++ break; ++ } ++ spin_lock(&msg_queue_spinlock); ++ } while (user_service->msg_remove == ++ user_service->msg_insert); ++ ++ if (ret) ++ break; ++ } ++ ++ BUG_ON((int)(user_service->msg_insert - ++ user_service->msg_remove) < 0); ++ ++ header = user_service->msg_queue[user_service->msg_remove & ++ (MSG_QUEUE_SIZE - 1)]; ++ user_service->msg_remove++; ++ spin_unlock(&msg_queue_spinlock); ++ ++ up(&user_service->remove_event); ++ if (header == NULL) ++ ret = -ENOTCONN; ++ else if (header->size <= args.bufsize) { ++ /* Copy to user space if msgbuf is not NULL */ ++ if ((args.buf == NULL) || ++ (copy_to_user((void __user *)args.buf, ++ header->data, ++ header->size) == 0)) { ++ ret = header->size; ++ vchiq_release_message( ++ service->handle, ++ header); ++ } else ++ ret = -EFAULT; ++ } else { ++ vchiq_log_error(vchiq_arm_log_level, ++ "header %x: bufsize %x < size %x", ++ (unsigned int)header, args.bufsize, ++ header->size); ++ WARN(1, "invalid size\n"); ++ ret = -EMSGSIZE; ++ } ++ DEBUG_TRACE(DEQUEUE_MESSAGE_LINE); ++ } break; ++ ++ case VCHIQ_IOC_GET_CLIENT_ID: { ++ VCHIQ_SERVICE_HANDLE_T handle = (VCHIQ_SERVICE_HANDLE_T)arg; ++ ++ ret = vchiq_get_client_id(handle); ++ } break; ++ ++ case VCHIQ_IOC_GET_CONFIG: { ++ VCHIQ_GET_CONFIG_T args; ++ VCHIQ_CONFIG_T config; ++ ++ if (copy_from_user(&args, (const void __user *)arg, ++ sizeof(args)) != 0) { ++ ret = -EFAULT; ++ break; ++ } ++ if (args.config_size > sizeof(config)) { ++ ret = -EINVAL; ++ break; ++ } ++ status = vchiq_get_config(instance, args.config_size, &config); ++ if (status == VCHIQ_SUCCESS) { ++ if (copy_to_user((void __user *)args.pconfig, ++ &config, args.config_size) != 0) { ++ ret = -EFAULT; ++ break; ++ } ++ } ++ } break; ++ ++ case VCHIQ_IOC_SET_SERVICE_OPTION: { ++ VCHIQ_SET_SERVICE_OPTION_T args; ++ ++ if (copy_from_user( ++ &args, (const void __user *)arg, ++ sizeof(args)) != 0) { ++ ret = -EFAULT; ++ break; ++ } ++ ++ service = find_service_for_instance(instance, args.handle); ++ if (!service) { ++ ret = -EINVAL; ++ break; ++ } ++ ++ status = vchiq_set_service_option( ++ args.handle, args.option, args.value); ++ } break; ++ ++ case VCHIQ_IOC_DUMP_PHYS_MEM: { ++ VCHIQ_DUMP_MEM_T args; ++ ++ if (copy_from_user ++ (&args, (const void __user *)arg, ++ sizeof(args)) != 0) { ++ ret = -EFAULT; ++ break; ++ } ++ dump_phys_mem(args.virt_addr, args.num_bytes); ++ } break; ++ ++ case VCHIQ_IOC_LIB_VERSION: { ++ unsigned int lib_version = (unsigned int)arg; ++ ++ if (lib_version < VCHIQ_VERSION_MIN) ++ ret = -EINVAL; ++ else if (lib_version >= VCHIQ_VERSION_CLOSE_DELIVERED) ++ instance->use_close_delivered = 1; ++ } break; ++ ++ case VCHIQ_IOC_CLOSE_DELIVERED: { ++ VCHIQ_SERVICE_HANDLE_T handle = (VCHIQ_SERVICE_HANDLE_T)arg; ++ ++ service = find_closed_service_for_instance(instance, handle); ++ if (service != NULL) { ++ USER_SERVICE_T *user_service = ++ (USER_SERVICE_T *)service->base.userdata; ++ close_delivered(user_service); ++ } ++ else ++ ret = -EINVAL; ++ } break; ++ ++ default: ++ ret = -ENOTTY; ++ break; ++ } ++ ++ if (service) ++ unlock_service(service); ++ ++ if (ret == 0) { ++ if (status == VCHIQ_ERROR) ++ ret = -EIO; ++ else if (status == VCHIQ_RETRY) ++ ret = -EINTR; ++ } ++ ++ if ((status == VCHIQ_SUCCESS) && (ret < 0) && (ret != -EINTR) && ++ (ret != -EWOULDBLOCK)) ++ vchiq_log_info(vchiq_arm_log_level, ++ " ioctl instance %lx, cmd %s -> status %d, %ld", ++ (unsigned long)instance, ++ (_IOC_NR(cmd) <= VCHIQ_IOC_MAX) ? ++ ioctl_names[_IOC_NR(cmd)] : ++ "<invalid>", ++ status, ret); ++ else ++ vchiq_log_trace(vchiq_arm_log_level, ++ " ioctl instance %lx, cmd %s -> status %d, %ld", ++ (unsigned long)instance, ++ (_IOC_NR(cmd) <= VCHIQ_IOC_MAX) ? ++ ioctl_names[_IOC_NR(cmd)] : ++ "<invalid>", ++ status, ret); ++ ++ return ret; ++} ++ ++/**************************************************************************** ++* ++* vchiq_open ++* ++***************************************************************************/ ++ ++static int ++vchiq_open(struct inode *inode, struct file *file) ++{ ++ int dev = iminor(inode) & 0x0f; ++ vchiq_log_info(vchiq_arm_log_level, "vchiq_open"); ++ switch (dev) { ++ case VCHIQ_MINOR: { ++ int ret; ++ VCHIQ_STATE_T *state = vchiq_get_state(); ++ VCHIQ_INSTANCE_T instance; ++ ++ if (!state) { ++ vchiq_log_error(vchiq_arm_log_level, ++ "vchiq has no connection to VideoCore"); ++ return -ENOTCONN; ++ } ++ ++ instance = kzalloc(sizeof(*instance), GFP_KERNEL); ++ if (!instance) ++ return -ENOMEM; ++ ++ instance->state = state; ++ instance->pid = current->tgid; ++ ++ ret = vchiq_debugfs_add_instance(instance); ++ if (ret != 0) { ++ kfree(instance); ++ return ret; ++ } ++ ++ sema_init(&instance->insert_event, 0); ++ sema_init(&instance->remove_event, 0); ++ mutex_init(&instance->completion_mutex); ++ mutex_init(&instance->bulk_waiter_list_mutex); ++ INIT_LIST_HEAD(&instance->bulk_waiter_list); ++ ++ file->private_data = instance; ++ } break; ++ ++ default: ++ vchiq_log_error(vchiq_arm_log_level, ++ "Unknown minor device: %d", dev); ++ return -ENXIO; ++ } ++ ++ return 0; ++} ++ ++/**************************************************************************** ++* ++* vchiq_release ++* ++***************************************************************************/ ++ ++static int ++vchiq_release(struct inode *inode, struct file *file) ++{ ++ int dev = iminor(inode) & 0x0f; ++ int ret = 0; ++ switch (dev) { ++ case VCHIQ_MINOR: { ++ VCHIQ_INSTANCE_T instance = file->private_data; ++ VCHIQ_STATE_T *state = vchiq_get_state(); ++ VCHIQ_SERVICE_T *service; ++ int i; ++ ++ vchiq_log_info(vchiq_arm_log_level, ++ "vchiq_release: instance=%lx", ++ (unsigned long)instance); ++ ++ if (!state) { ++ ret = -EPERM; ++ goto out; ++ } ++ ++ /* Ensure videocore is awake to allow termination. */ ++ vchiq_use_internal(instance->state, NULL, ++ USE_TYPE_VCHIQ); ++ ++ mutex_lock(&instance->completion_mutex); ++ ++ /* Wake the completion thread and ask it to exit */ ++ instance->closing = 1; ++ up(&instance->insert_event); ++ ++ mutex_unlock(&instance->completion_mutex); ++ ++ /* Wake the slot handler if the completion queue is full. */ ++ up(&instance->remove_event); ++ ++ /* Mark all services for termination... */ ++ i = 0; ++ while ((service = next_service_by_instance(state, instance, ++ &i)) != NULL) { ++ USER_SERVICE_T *user_service = service->base.userdata; ++ ++ /* Wake the slot handler if the msg queue is full. */ ++ up(&user_service->remove_event); ++ ++ vchiq_terminate_service_internal(service); ++ unlock_service(service); ++ } ++ ++ /* ...and wait for them to die */ ++ i = 0; ++ while ((service = next_service_by_instance(state, instance, &i)) ++ != NULL) { ++ USER_SERVICE_T *user_service = service->base.userdata; ++ ++ down(&service->remove_event); ++ ++ BUG_ON(service->srvstate != VCHIQ_SRVSTATE_FREE); ++ ++ spin_lock(&msg_queue_spinlock); ++ ++ while (user_service->msg_remove != ++ user_service->msg_insert) { ++ VCHIQ_HEADER_T *header = user_service-> ++ msg_queue[user_service->msg_remove & ++ (MSG_QUEUE_SIZE - 1)]; ++ user_service->msg_remove++; ++ spin_unlock(&msg_queue_spinlock); ++ ++ if (header) ++ vchiq_release_message( ++ service->handle, ++ header); ++ spin_lock(&msg_queue_spinlock); ++ } ++ ++ spin_unlock(&msg_queue_spinlock); ++ ++ unlock_service(service); ++ } ++ ++ /* Release any closed services */ ++ while (instance->completion_remove != ++ instance->completion_insert) { ++ VCHIQ_COMPLETION_DATA_T *completion; ++ VCHIQ_SERVICE_T *service; ++ completion = &instance->completions[ ++ instance->completion_remove & ++ (MAX_COMPLETIONS - 1)]; ++ service = completion->service_userdata; ++ if (completion->reason == VCHIQ_SERVICE_CLOSED) ++ { ++ USER_SERVICE_T *user_service = ++ service->base.userdata; ++ ++ /* Wake any blocked user-thread */ ++ if (instance->use_close_delivered) ++ up(&user_service->close_event); ++ unlock_service(service); ++ } ++ instance->completion_remove++; ++ } ++ ++ /* Release the PEER service count. */ ++ vchiq_release_internal(instance->state, NULL); ++ ++ { ++ struct list_head *pos, *next; ++ list_for_each_safe(pos, next, ++ &instance->bulk_waiter_list) { ++ struct bulk_waiter_node *waiter; ++ waiter = list_entry(pos, ++ struct bulk_waiter_node, ++ list); ++ list_del(pos); ++ vchiq_log_info(vchiq_arm_log_level, ++ "bulk_waiter - cleaned up %x " ++ "for pid %d", ++ (unsigned int)waiter, waiter->pid); ++ kfree(waiter); ++ } ++ } ++ ++ vchiq_debugfs_remove_instance(instance); ++ ++ kfree(instance); ++ file->private_data = NULL; ++ } break; ++ ++ default: ++ vchiq_log_error(vchiq_arm_log_level, ++ "Unknown minor device: %d", dev); ++ ret = -ENXIO; ++ } ++ ++out: ++ return ret; ++} ++ ++/**************************************************************************** ++* ++* vchiq_dump ++* ++***************************************************************************/ ++ ++void ++vchiq_dump(void *dump_context, const char *str, int len) ++{ ++ DUMP_CONTEXT_T *context = (DUMP_CONTEXT_T *)dump_context; ++ ++ if (context->actual < context->space) { ++ int copy_bytes; ++ if (context->offset > 0) { ++ int skip_bytes = min(len, (int)context->offset); ++ str += skip_bytes; ++ len -= skip_bytes; ++ context->offset -= skip_bytes; ++ if (context->offset > 0) ++ return; ++ } ++ copy_bytes = min(len, (int)(context->space - context->actual)); ++ if (copy_bytes == 0) ++ return; ++ if (copy_to_user(context->buf + context->actual, str, ++ copy_bytes)) ++ context->actual = -EFAULT; ++ context->actual += copy_bytes; ++ len -= copy_bytes; ++ ++ /* If tne terminating NUL is included in the length, then it ++ ** marks the end of a line and should be replaced with a ++ ** carriage return. */ ++ if ((len == 0) && (str[copy_bytes - 1] == '\0')) { ++ char cr = '\n'; ++ if (copy_to_user(context->buf + context->actual - 1, ++ &cr, 1)) ++ context->actual = -EFAULT; ++ } ++ } ++} ++ ++/**************************************************************************** ++* ++* vchiq_dump_platform_instance_state ++* ++***************************************************************************/ ++ ++void ++vchiq_dump_platform_instances(void *dump_context) ++{ ++ VCHIQ_STATE_T *state = vchiq_get_state(); ++ char buf[80]; ++ int len; ++ int i; ++ ++ /* There is no list of instances, so instead scan all services, ++ marking those that have been dumped. */ ++ ++ for (i = 0; i < state->unused_service; i++) { ++ VCHIQ_SERVICE_T *service = state->services[i]; ++ VCHIQ_INSTANCE_T instance; ++ ++ if (service && (service->base.callback == service_callback)) { ++ instance = service->instance; ++ if (instance) ++ instance->mark = 0; ++ } ++ } ++ ++ for (i = 0; i < state->unused_service; i++) { ++ VCHIQ_SERVICE_T *service = state->services[i]; ++ VCHIQ_INSTANCE_T instance; ++ ++ if (service && (service->base.callback == service_callback)) { ++ instance = service->instance; ++ if (instance && !instance->mark) { ++ len = snprintf(buf, sizeof(buf), ++ "Instance %x: pid %d,%s completions " ++ "%d/%d", ++ (unsigned int)instance, instance->pid, ++ instance->connected ? " connected, " : ++ "", ++ instance->completion_insert - ++ instance->completion_remove, ++ MAX_COMPLETIONS); ++ ++ vchiq_dump(dump_context, buf, len + 1); ++ ++ instance->mark = 1; ++ } ++ } ++ } ++} ++ ++/**************************************************************************** ++* ++* vchiq_dump_platform_service_state ++* ++***************************************************************************/ ++ ++void ++vchiq_dump_platform_service_state(void *dump_context, VCHIQ_SERVICE_T *service) ++{ ++ USER_SERVICE_T *user_service = (USER_SERVICE_T *)service->base.userdata; ++ char buf[80]; ++ int len; ++ ++ len = snprintf(buf, sizeof(buf), " instance %x", ++ (unsigned int)service->instance); ++ ++ if ((service->base.callback == service_callback) && ++ user_service->is_vchi) { ++ len += snprintf(buf + len, sizeof(buf) - len, ++ ", %d/%d messages", ++ user_service->msg_insert - user_service->msg_remove, ++ MSG_QUEUE_SIZE); ++ ++ if (user_service->dequeue_pending) ++ len += snprintf(buf + len, sizeof(buf) - len, ++ " (dequeue pending)"); ++ } ++ ++ vchiq_dump(dump_context, buf, len + 1); ++} ++ ++/**************************************************************************** ++* ++* dump_user_mem ++* ++***************************************************************************/ ++ ++static void ++dump_phys_mem(void *virt_addr, uint32_t num_bytes) ++{ ++ int rc; ++ uint8_t *end_virt_addr = virt_addr + num_bytes; ++ int num_pages; ++ int offset; ++ int end_offset; ++ int page_idx; ++ int prev_idx; ++ struct page *page; ++ struct page **pages; ++ uint8_t *kmapped_virt_ptr; ++ ++ /* Align virtAddr and endVirtAddr to 16 byte boundaries. */ ++ ++ virt_addr = (void *)((unsigned long)virt_addr & ~0x0fuL); ++ end_virt_addr = (void *)(((unsigned long)end_virt_addr + 15uL) & ++ ~0x0fuL); ++ ++ offset = (int)(long)virt_addr & (PAGE_SIZE - 1); ++ end_offset = (int)(long)end_virt_addr & (PAGE_SIZE - 1); ++ ++ num_pages = (offset + num_bytes + PAGE_SIZE - 1) / PAGE_SIZE; ++ ++ pages = kmalloc(sizeof(struct page *) * num_pages, GFP_KERNEL); ++ if (pages == NULL) { ++ vchiq_log_error(vchiq_arm_log_level, ++ "Unable to allocation memory for %d pages\n", ++ num_pages); ++ return; ++ } ++ ++ down_read(¤t->mm->mmap_sem); ++ rc = get_user_pages(current, /* task */ ++ current->mm, /* mm */ ++ (unsigned long)virt_addr, /* start */ ++ num_pages, /* len */ ++ 0, /* write */ ++ 0, /* force */ ++ pages, /* pages (array of page pointers) */ ++ NULL); /* vmas */ ++ up_read(¤t->mm->mmap_sem); ++ ++ prev_idx = -1; ++ page = NULL; ++ ++ while (offset < end_offset) { ++ ++ int page_offset = offset % PAGE_SIZE; ++ page_idx = offset / PAGE_SIZE; ++ ++ if (page_idx != prev_idx) { ++ ++ if (page != NULL) ++ kunmap(page); ++ page = pages[page_idx]; ++ kmapped_virt_ptr = kmap(page); ++ ++ prev_idx = page_idx; ++ } ++ ++ if (vchiq_arm_log_level >= VCHIQ_LOG_TRACE) ++ vchiq_log_dump_mem("ph", ++ (uint32_t)(unsigned long)&kmapped_virt_ptr[ ++ page_offset], ++ &kmapped_virt_ptr[page_offset], 16); ++ ++ offset += 16; ++ } ++ if (page != NULL) ++ kunmap(page); ++ ++ for (page_idx = 0; page_idx < num_pages; page_idx++) ++ page_cache_release(pages[page_idx]); ++ ++ kfree(pages); ++} ++ ++/**************************************************************************** ++* ++* vchiq_read ++* ++***************************************************************************/ ++ ++static ssize_t ++vchiq_read(struct file *file, char __user *buf, ++ size_t count, loff_t *ppos) ++{ ++ DUMP_CONTEXT_T context; ++ context.buf = buf; ++ context.actual = 0; ++ context.space = count; ++ context.offset = *ppos; ++ ++ vchiq_dump_state(&context, &g_state); ++ ++ *ppos += context.actual; ++ ++ return context.actual; ++} ++ ++VCHIQ_STATE_T * ++vchiq_get_state(void) ++{ ++ ++ if (g_state.remote == NULL) ++ printk(KERN_ERR "%s: g_state.remote == NULL\n", __func__); ++ else if (g_state.remote->initialised != 1) ++ printk(KERN_NOTICE "%s: g_state.remote->initialised != 1 (%d)\n", ++ __func__, g_state.remote->initialised); ++ ++ return ((g_state.remote != NULL) && ++ (g_state.remote->initialised == 1)) ? &g_state : NULL; ++} ++ ++static const struct file_operations ++vchiq_fops = { ++ .owner = THIS_MODULE, ++ .unlocked_ioctl = vchiq_ioctl, ++ .open = vchiq_open, ++ .release = vchiq_release, ++ .read = vchiq_read ++}; ++ ++/* ++ * Autosuspend related functionality ++ */ ++ ++int ++vchiq_videocore_wanted(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state); ++ if (!arm_state) ++ /* autosuspend not supported - always return wanted */ ++ return 1; ++ else if (arm_state->blocked_count) ++ return 1; ++ else if (!arm_state->videocore_use_count) ++ /* usage count zero - check for override unless we're forcing */ ++ if (arm_state->resume_blocked) ++ return 0; ++ else ++ return vchiq_platform_videocore_wanted(state); ++ else ++ /* non-zero usage count - videocore still required */ ++ return 1; ++} ++ ++static VCHIQ_STATUS_T ++vchiq_keepalive_vchiq_callback(VCHIQ_REASON_T reason, ++ VCHIQ_HEADER_T *header, ++ VCHIQ_SERVICE_HANDLE_T service_user, ++ void *bulk_user) ++{ ++ vchiq_log_error(vchiq_susp_log_level, ++ "%s callback reason %d", __func__, reason); ++ return 0; ++} ++ ++static int ++vchiq_keepalive_thread_func(void *v) ++{ ++ VCHIQ_STATE_T *state = (VCHIQ_STATE_T *) v; ++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state); ++ ++ VCHIQ_STATUS_T status; ++ VCHIQ_INSTANCE_T instance; ++ VCHIQ_SERVICE_HANDLE_T ka_handle; ++ ++ VCHIQ_SERVICE_PARAMS_T params = { ++ .fourcc = VCHIQ_MAKE_FOURCC('K', 'E', 'E', 'P'), ++ .callback = vchiq_keepalive_vchiq_callback, ++ .version = KEEPALIVE_VER, ++ .version_min = KEEPALIVE_VER_MIN ++ }; ++ ++ status = vchiq_initialise(&instance); ++ if (status != VCHIQ_SUCCESS) { ++ vchiq_log_error(vchiq_susp_log_level, ++ "%s vchiq_initialise failed %d", __func__, status); ++ goto exit; ++ } ++ ++ status = vchiq_connect(instance); ++ if (status != VCHIQ_SUCCESS) { ++ vchiq_log_error(vchiq_susp_log_level, ++ "%s vchiq_connect failed %d", __func__, status); ++ goto shutdown; ++ } ++ ++ status = vchiq_add_service(instance, ¶ms, &ka_handle); ++ if (status != VCHIQ_SUCCESS) { ++ vchiq_log_error(vchiq_susp_log_level, ++ "%s vchiq_open_service failed %d", __func__, status); ++ goto shutdown; ++ } ++ ++ while (1) { ++ long rc = 0, uc = 0; ++ if (wait_for_completion_interruptible(&arm_state->ka_evt) ++ != 0) { ++ vchiq_log_error(vchiq_susp_log_level, ++ "%s interrupted", __func__); ++ flush_signals(current); ++ continue; ++ } ++ ++ /* read and clear counters. Do release_count then use_count to ++ * prevent getting more releases than uses */ ++ rc = atomic_xchg(&arm_state->ka_release_count, 0); ++ uc = atomic_xchg(&arm_state->ka_use_count, 0); ++ ++ /* Call use/release service the requisite number of times. ++ * Process use before release so use counts don't go negative */ ++ while (uc--) { ++ atomic_inc(&arm_state->ka_use_ack_count); ++ status = vchiq_use_service(ka_handle); ++ if (status != VCHIQ_SUCCESS) { ++ vchiq_log_error(vchiq_susp_log_level, ++ "%s vchiq_use_service error %d", ++ __func__, status); ++ } ++ } ++ while (rc--) { ++ status = vchiq_release_service(ka_handle); ++ if (status != VCHIQ_SUCCESS) { ++ vchiq_log_error(vchiq_susp_log_level, ++ "%s vchiq_release_service error %d", ++ __func__, status); ++ } ++ } ++ } ++ ++shutdown: ++ vchiq_shutdown(instance); ++exit: ++ return 0; ++} ++ ++ ++ ++VCHIQ_STATUS_T ++vchiq_arm_init_state(VCHIQ_STATE_T *state, VCHIQ_ARM_STATE_T *arm_state) ++{ ++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS; ++ ++ if (arm_state) { ++ rwlock_init(&arm_state->susp_res_lock); ++ ++ init_completion(&arm_state->ka_evt); ++ atomic_set(&arm_state->ka_use_count, 0); ++ atomic_set(&arm_state->ka_use_ack_count, 0); ++ atomic_set(&arm_state->ka_release_count, 0); ++ ++ init_completion(&arm_state->vc_suspend_complete); ++ ++ init_completion(&arm_state->vc_resume_complete); ++ /* Initialise to 'done' state. We only want to block on resume ++ * completion while videocore is suspended. */ ++ set_resume_state(arm_state, VC_RESUME_RESUMED); ++ ++ init_completion(&arm_state->resume_blocker); ++ /* Initialise to 'done' state. We only want to block on this ++ * completion while resume is blocked */ ++ complete_all(&arm_state->resume_blocker); ++ ++ init_completion(&arm_state->blocked_blocker); ++ /* Initialise to 'done' state. We only want to block on this ++ * completion while things are waiting on the resume blocker */ ++ complete_all(&arm_state->blocked_blocker); ++ ++ arm_state->suspend_timer_timeout = SUSPEND_TIMER_TIMEOUT_MS; ++ arm_state->suspend_timer_running = 0; ++ init_timer(&arm_state->suspend_timer); ++ arm_state->suspend_timer.data = (unsigned long)(state); ++ arm_state->suspend_timer.function = suspend_timer_callback; ++ ++ arm_state->first_connect = 0; ++ ++ } ++ return status; ++} ++ ++/* ++** Functions to modify the state variables; ++** set_suspend_state ++** set_resume_state ++** ++** There are more state variables than we might like, so ensure they remain in ++** step. Suspend and resume state are maintained separately, since most of ++** these state machines can operate independently. However, there are a few ++** states where state transitions in one state machine cause a reset to the ++** other state machine. In addition, there are some completion events which ++** need to occur on state machine reset and end-state(s), so these are also ++** dealt with in these functions. ++** ++** In all states we set the state variable according to the input, but in some ++** cases we perform additional steps outlined below; ++** ++** VC_SUSPEND_IDLE - Initialise the suspend completion at the same time. ++** The suspend completion is completed after any suspend ++** attempt. When we reset the state machine we also reset ++** the completion. This reset occurs when videocore is ++** resumed, and also if we initiate suspend after a suspend ++** failure. ++** ++** VC_SUSPEND_IN_PROGRESS - This state is considered the point of no return for ++** suspend - ie from this point on we must try to suspend ++** before resuming can occur. We therefore also reset the ++** resume state machine to VC_RESUME_IDLE in this state. ++** ++** VC_SUSPEND_SUSPENDED - Suspend has completed successfully. Also call ++** complete_all on the suspend completion to notify ++** anything waiting for suspend to happen. ++** ++** VC_SUSPEND_REJECTED - Videocore rejected suspend. Videocore will also ++** initiate resume, so no need to alter resume state. ++** We call complete_all on the suspend completion to notify ++** of suspend rejection. ++** ++** VC_SUSPEND_FAILED - We failed to initiate videocore suspend. We notify the ++** suspend completion and reset the resume state machine. ++** ++** VC_RESUME_IDLE - Initialise the resume completion at the same time. The ++** resume completion is in it's 'done' state whenever ++** videcore is running. Therfore, the VC_RESUME_IDLE state ++** implies that videocore is suspended. ++** Hence, any thread which needs to wait until videocore is ++** running can wait on this completion - it will only block ++** if videocore is suspended. ++** ++** VC_RESUME_RESUMED - Resume has completed successfully. Videocore is running. ++** Call complete_all on the resume completion to unblock ++** any threads waiting for resume. Also reset the suspend ++** state machine to it's idle state. ++** ++** VC_RESUME_FAILED - Currently unused - no mechanism to fail resume exists. ++*/ ++ ++void ++set_suspend_state(VCHIQ_ARM_STATE_T *arm_state, ++ enum vc_suspend_status new_state) ++{ ++ /* set the state in all cases */ ++ arm_state->vc_suspend_state = new_state; ++ ++ /* state specific additional actions */ ++ switch (new_state) { ++ case VC_SUSPEND_FORCE_CANCELED: ++ complete_all(&arm_state->vc_suspend_complete); ++ break; ++ case VC_SUSPEND_REJECTED: ++ complete_all(&arm_state->vc_suspend_complete); ++ break; ++ case VC_SUSPEND_FAILED: ++ complete_all(&arm_state->vc_suspend_complete); ++ arm_state->vc_resume_state = VC_RESUME_RESUMED; ++ complete_all(&arm_state->vc_resume_complete); ++ break; ++ case VC_SUSPEND_IDLE: ++ reinit_completion(&arm_state->vc_suspend_complete); ++ break; ++ case VC_SUSPEND_REQUESTED: ++ break; ++ case VC_SUSPEND_IN_PROGRESS: ++ set_resume_state(arm_state, VC_RESUME_IDLE); ++ break; ++ case VC_SUSPEND_SUSPENDED: ++ complete_all(&arm_state->vc_suspend_complete); ++ break; ++ default: ++ BUG(); ++ break; ++ } ++} ++ ++void ++set_resume_state(VCHIQ_ARM_STATE_T *arm_state, ++ enum vc_resume_status new_state) ++{ ++ /* set the state in all cases */ ++ arm_state->vc_resume_state = new_state; ++ ++ /* state specific additional actions */ ++ switch (new_state) { ++ case VC_RESUME_FAILED: ++ break; ++ case VC_RESUME_IDLE: ++ reinit_completion(&arm_state->vc_resume_complete); ++ break; ++ case VC_RESUME_REQUESTED: ++ break; ++ case VC_RESUME_IN_PROGRESS: ++ break; ++ case VC_RESUME_RESUMED: ++ complete_all(&arm_state->vc_resume_complete); ++ set_suspend_state(arm_state, VC_SUSPEND_IDLE); ++ break; ++ default: ++ BUG(); ++ break; ++ } ++} ++ ++ ++/* should be called with the write lock held */ ++inline void ++start_suspend_timer(VCHIQ_ARM_STATE_T *arm_state) ++{ ++ del_timer(&arm_state->suspend_timer); ++ arm_state->suspend_timer.expires = jiffies + ++ msecs_to_jiffies(arm_state-> ++ suspend_timer_timeout); ++ add_timer(&arm_state->suspend_timer); ++ arm_state->suspend_timer_running = 1; ++} ++ ++/* should be called with the write lock held */ ++static inline void ++stop_suspend_timer(VCHIQ_ARM_STATE_T *arm_state) ++{ ++ if (arm_state->suspend_timer_running) { ++ del_timer(&arm_state->suspend_timer); ++ arm_state->suspend_timer_running = 0; ++ } ++} ++ ++static inline int ++need_resume(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state); ++ return (arm_state->vc_suspend_state > VC_SUSPEND_IDLE) && ++ (arm_state->vc_resume_state < VC_RESUME_REQUESTED) && ++ vchiq_videocore_wanted(state); ++} ++ ++static int ++block_resume(VCHIQ_ARM_STATE_T *arm_state) ++{ ++ int status = VCHIQ_SUCCESS; ++ const unsigned long timeout_val = ++ msecs_to_jiffies(FORCE_SUSPEND_TIMEOUT_MS); ++ int resume_count = 0; ++ ++ /* Allow any threads which were blocked by the last force suspend to ++ * complete if they haven't already. Only give this one shot; if ++ * blocked_count is incremented after blocked_blocker is completed ++ * (which only happens when blocked_count hits 0) then those threads ++ * will have to wait until next time around */ ++ if (arm_state->blocked_count) { ++ reinit_completion(&arm_state->blocked_blocker); ++ write_unlock_bh(&arm_state->susp_res_lock); ++ vchiq_log_info(vchiq_susp_log_level, "%s wait for previously " ++ "blocked clients", __func__); ++ if (wait_for_completion_interruptible_timeout( ++ &arm_state->blocked_blocker, timeout_val) ++ <= 0) { ++ vchiq_log_error(vchiq_susp_log_level, "%s wait for " ++ "previously blocked clients failed" , __func__); ++ status = VCHIQ_ERROR; ++ write_lock_bh(&arm_state->susp_res_lock); ++ goto out; ++ } ++ vchiq_log_info(vchiq_susp_log_level, "%s previously blocked " ++ "clients resumed", __func__); ++ write_lock_bh(&arm_state->susp_res_lock); ++ } ++ ++ /* We need to wait for resume to complete if it's in process */ ++ while (arm_state->vc_resume_state != VC_RESUME_RESUMED && ++ arm_state->vc_resume_state > VC_RESUME_IDLE) { ++ if (resume_count > 1) { ++ status = VCHIQ_ERROR; ++ vchiq_log_error(vchiq_susp_log_level, "%s waited too " ++ "many times for resume" , __func__); ++ goto out; ++ } ++ write_unlock_bh(&arm_state->susp_res_lock); ++ vchiq_log_info(vchiq_susp_log_level, "%s wait for resume", ++ __func__); ++ if (wait_for_completion_interruptible_timeout( ++ &arm_state->vc_resume_complete, timeout_val) ++ <= 0) { ++ vchiq_log_error(vchiq_susp_log_level, "%s wait for " ++ "resume failed (%s)", __func__, ++ resume_state_names[arm_state->vc_resume_state + ++ VC_RESUME_NUM_OFFSET]); ++ status = VCHIQ_ERROR; ++ write_lock_bh(&arm_state->susp_res_lock); ++ goto out; ++ } ++ vchiq_log_info(vchiq_susp_log_level, "%s resumed", __func__); ++ write_lock_bh(&arm_state->susp_res_lock); ++ resume_count++; ++ } ++ reinit_completion(&arm_state->resume_blocker); ++ arm_state->resume_blocked = 1; ++ ++out: ++ return status; ++} ++ ++static inline void ++unblock_resume(VCHIQ_ARM_STATE_T *arm_state) ++{ ++ complete_all(&arm_state->resume_blocker); ++ arm_state->resume_blocked = 0; ++} ++ ++/* Initiate suspend via slot handler. Should be called with the write lock ++ * held */ ++VCHIQ_STATUS_T ++vchiq_arm_vcsuspend(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_STATUS_T status = VCHIQ_ERROR; ++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state); ++ ++ if (!arm_state) ++ goto out; ++ ++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__); ++ status = VCHIQ_SUCCESS; ++ ++ ++ switch (arm_state->vc_suspend_state) { ++ case VC_SUSPEND_REQUESTED: ++ vchiq_log_info(vchiq_susp_log_level, "%s: suspend already " ++ "requested", __func__); ++ break; ++ case VC_SUSPEND_IN_PROGRESS: ++ vchiq_log_info(vchiq_susp_log_level, "%s: suspend already in " ++ "progress", __func__); ++ break; ++ ++ default: ++ /* We don't expect to be in other states, so log but continue ++ * anyway */ ++ vchiq_log_error(vchiq_susp_log_level, ++ "%s unexpected suspend state %s", __func__, ++ suspend_state_names[arm_state->vc_suspend_state + ++ VC_SUSPEND_NUM_OFFSET]); ++ /* fall through */ ++ case VC_SUSPEND_REJECTED: ++ case VC_SUSPEND_FAILED: ++ /* Ensure any idle state actions have been run */ ++ set_suspend_state(arm_state, VC_SUSPEND_IDLE); ++ /* fall through */ ++ case VC_SUSPEND_IDLE: ++ vchiq_log_info(vchiq_susp_log_level, ++ "%s: suspending", __func__); ++ set_suspend_state(arm_state, VC_SUSPEND_REQUESTED); ++ /* kick the slot handler thread to initiate suspend */ ++ request_poll(state, NULL, 0); ++ break; ++ } ++ ++out: ++ vchiq_log_trace(vchiq_susp_log_level, "%s exit %d", __func__, status); ++ return status; ++} ++ ++void ++vchiq_platform_check_suspend(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state); ++ int susp = 0; ++ ++ if (!arm_state) ++ goto out; ++ ++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__); ++ ++ write_lock_bh(&arm_state->susp_res_lock); ++ if (arm_state->vc_suspend_state == VC_SUSPEND_REQUESTED && ++ arm_state->vc_resume_state == VC_RESUME_RESUMED) { ++ set_suspend_state(arm_state, VC_SUSPEND_IN_PROGRESS); ++ susp = 1; ++ } ++ write_unlock_bh(&arm_state->susp_res_lock); ++ ++ if (susp) ++ vchiq_platform_suspend(state); ++ ++out: ++ vchiq_log_trace(vchiq_susp_log_level, "%s exit", __func__); ++ return; ++} ++ ++ ++static void ++output_timeout_error(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state); ++ char service_err[50] = ""; ++ int vc_use_count = arm_state->videocore_use_count; ++ int active_services = state->unused_service; ++ int i; ++ ++ if (!arm_state->videocore_use_count) { ++ snprintf(service_err, 50, " Videocore usecount is 0"); ++ goto output_msg; ++ } ++ for (i = 0; i < active_services; i++) { ++ VCHIQ_SERVICE_T *service_ptr = state->services[i]; ++ if (service_ptr && service_ptr->service_use_count && ++ (service_ptr->srvstate != VCHIQ_SRVSTATE_FREE)) { ++ snprintf(service_err, 50, " %c%c%c%c(%d) service has " ++ "use count %d%s", VCHIQ_FOURCC_AS_4CHARS( ++ service_ptr->base.fourcc), ++ service_ptr->client_id, ++ service_ptr->service_use_count, ++ service_ptr->service_use_count == ++ vc_use_count ? "" : " (+ more)"); ++ break; ++ } ++ } ++ ++output_msg: ++ vchiq_log_error(vchiq_susp_log_level, ++ "timed out waiting for vc suspend (%d).%s", ++ arm_state->autosuspend_override, service_err); ++ ++} ++ ++/* Try to get videocore into suspended state, regardless of autosuspend state. ++** We don't actually force suspend, since videocore may get into a bad state ++** if we force suspend at a bad time. Instead, we wait for autosuspend to ++** determine a good point to suspend. If this doesn't happen within 100ms we ++** report failure. ++** ++** Returns VCHIQ_SUCCESS if videocore suspended successfully, VCHIQ_RETRY if ++** videocore failed to suspend in time or VCHIQ_ERROR if interrupted. ++*/ ++VCHIQ_STATUS_T ++vchiq_arm_force_suspend(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state); ++ VCHIQ_STATUS_T status = VCHIQ_ERROR; ++ long rc = 0; ++ int repeat = -1; ++ ++ if (!arm_state) ++ goto out; ++ ++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__); ++ ++ write_lock_bh(&arm_state->susp_res_lock); ++ ++ status = block_resume(arm_state); ++ if (status != VCHIQ_SUCCESS) ++ goto unlock; ++ if (arm_state->vc_suspend_state == VC_SUSPEND_SUSPENDED) { ++ /* Already suspended - just block resume and exit */ ++ vchiq_log_info(vchiq_susp_log_level, "%s already suspended", ++ __func__); ++ status = VCHIQ_SUCCESS; ++ goto unlock; ++ } else if (arm_state->vc_suspend_state <= VC_SUSPEND_IDLE) { ++ /* initiate suspend immediately in the case that we're waiting ++ * for the timeout */ ++ stop_suspend_timer(arm_state); ++ if (!vchiq_videocore_wanted(state)) { ++ vchiq_log_info(vchiq_susp_log_level, "%s videocore " ++ "idle, initiating suspend", __func__); ++ status = vchiq_arm_vcsuspend(state); ++ } else if (arm_state->autosuspend_override < ++ FORCE_SUSPEND_FAIL_MAX) { ++ vchiq_log_info(vchiq_susp_log_level, "%s letting " ++ "videocore go idle", __func__); ++ status = VCHIQ_SUCCESS; ++ } else { ++ vchiq_log_warning(vchiq_susp_log_level, "%s failed too " ++ "many times - attempting suspend", __func__); ++ status = vchiq_arm_vcsuspend(state); ++ } ++ } else { ++ vchiq_log_info(vchiq_susp_log_level, "%s videocore suspend " ++ "in progress - wait for completion", __func__); ++ status = VCHIQ_SUCCESS; ++ } ++ ++ /* Wait for suspend to happen due to system idle (not forced..) */ ++ if (status != VCHIQ_SUCCESS) ++ goto unblock_resume; ++ ++ do { ++ write_unlock_bh(&arm_state->susp_res_lock); ++ ++ rc = wait_for_completion_interruptible_timeout( ++ &arm_state->vc_suspend_complete, ++ msecs_to_jiffies(FORCE_SUSPEND_TIMEOUT_MS)); ++ ++ write_lock_bh(&arm_state->susp_res_lock); ++ if (rc < 0) { ++ vchiq_log_warning(vchiq_susp_log_level, "%s " ++ "interrupted waiting for suspend", __func__); ++ status = VCHIQ_ERROR; ++ goto unblock_resume; ++ } else if (rc == 0) { ++ if (arm_state->vc_suspend_state > VC_SUSPEND_IDLE) { ++ /* Repeat timeout once if in progress */ ++ if (repeat < 0) { ++ repeat = 1; ++ continue; ++ } ++ } ++ arm_state->autosuspend_override++; ++ output_timeout_error(state); ++ ++ status = VCHIQ_RETRY; ++ goto unblock_resume; ++ } ++ } while (0 < (repeat--)); ++ ++ /* Check and report state in case we need to abort ARM suspend */ ++ if (arm_state->vc_suspend_state != VC_SUSPEND_SUSPENDED) { ++ status = VCHIQ_RETRY; ++ vchiq_log_error(vchiq_susp_log_level, ++ "%s videocore suspend failed (state %s)", __func__, ++ suspend_state_names[arm_state->vc_suspend_state + ++ VC_SUSPEND_NUM_OFFSET]); ++ /* Reset the state only if it's still in an error state. ++ * Something could have already initiated another suspend. */ ++ if (arm_state->vc_suspend_state < VC_SUSPEND_IDLE) ++ set_suspend_state(arm_state, VC_SUSPEND_IDLE); ++ ++ goto unblock_resume; ++ } ++ ++ /* successfully suspended - unlock and exit */ ++ goto unlock; ++ ++unblock_resume: ++ /* all error states need to unblock resume before exit */ ++ unblock_resume(arm_state); ++ ++unlock: ++ write_unlock_bh(&arm_state->susp_res_lock); ++ ++out: ++ vchiq_log_trace(vchiq_susp_log_level, "%s exit %d", __func__, status); ++ return status; ++} ++ ++void ++vchiq_check_suspend(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state); ++ ++ if (!arm_state) ++ goto out; ++ ++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__); ++ ++ write_lock_bh(&arm_state->susp_res_lock); ++ if (arm_state->vc_suspend_state != VC_SUSPEND_SUSPENDED && ++ arm_state->first_connect && ++ !vchiq_videocore_wanted(state)) { ++ vchiq_arm_vcsuspend(state); ++ } ++ write_unlock_bh(&arm_state->susp_res_lock); ++ ++out: ++ vchiq_log_trace(vchiq_susp_log_level, "%s exit", __func__); ++ return; ++} ++ ++ ++int ++vchiq_arm_allow_resume(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state); ++ int resume = 0; ++ int ret = -1; ++ ++ if (!arm_state) ++ goto out; ++ ++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__); ++ ++ write_lock_bh(&arm_state->susp_res_lock); ++ unblock_resume(arm_state); ++ resume = vchiq_check_resume(state); ++ write_unlock_bh(&arm_state->susp_res_lock); ++ ++ if (resume) { ++ if (wait_for_completion_interruptible( ++ &arm_state->vc_resume_complete) < 0) { ++ vchiq_log_error(vchiq_susp_log_level, ++ "%s interrupted", __func__); ++ /* failed, cannot accurately derive suspend ++ * state, so exit early. */ ++ goto out; ++ } ++ } ++ ++ read_lock_bh(&arm_state->susp_res_lock); ++ if (arm_state->vc_suspend_state == VC_SUSPEND_SUSPENDED) { ++ vchiq_log_info(vchiq_susp_log_level, ++ "%s: Videocore remains suspended", __func__); ++ } else { ++ vchiq_log_info(vchiq_susp_log_level, ++ "%s: Videocore resumed", __func__); ++ ret = 0; ++ } ++ read_unlock_bh(&arm_state->susp_res_lock); ++out: ++ vchiq_log_trace(vchiq_susp_log_level, "%s exit %d", __func__, ret); ++ return ret; ++} ++ ++/* This function should be called with the write lock held */ ++int ++vchiq_check_resume(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state); ++ int resume = 0; ++ ++ if (!arm_state) ++ goto out; ++ ++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__); ++ ++ if (need_resume(state)) { ++ set_resume_state(arm_state, VC_RESUME_REQUESTED); ++ request_poll(state, NULL, 0); ++ resume = 1; ++ } ++ ++out: ++ vchiq_log_trace(vchiq_susp_log_level, "%s exit", __func__); ++ return resume; ++} ++ ++void ++vchiq_platform_check_resume(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state); ++ int res = 0; ++ ++ if (!arm_state) ++ goto out; ++ ++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__); ++ ++ write_lock_bh(&arm_state->susp_res_lock); ++ if (arm_state->wake_address == 0) { ++ vchiq_log_info(vchiq_susp_log_level, ++ "%s: already awake", __func__); ++ goto unlock; ++ } ++ if (arm_state->vc_resume_state == VC_RESUME_IN_PROGRESS) { ++ vchiq_log_info(vchiq_susp_log_level, ++ "%s: already resuming", __func__); ++ goto unlock; ++ } ++ ++ if (arm_state->vc_resume_state == VC_RESUME_REQUESTED) { ++ set_resume_state(arm_state, VC_RESUME_IN_PROGRESS); ++ res = 1; ++ } else ++ vchiq_log_trace(vchiq_susp_log_level, ++ "%s: not resuming (resume state %s)", __func__, ++ resume_state_names[arm_state->vc_resume_state + ++ VC_RESUME_NUM_OFFSET]); ++ ++unlock: ++ write_unlock_bh(&arm_state->susp_res_lock); ++ ++ if (res) ++ vchiq_platform_resume(state); ++ ++out: ++ vchiq_log_trace(vchiq_susp_log_level, "%s exit", __func__); ++ return; ++ ++} ++ ++ ++ ++VCHIQ_STATUS_T ++vchiq_use_internal(VCHIQ_STATE_T *state, VCHIQ_SERVICE_T *service, ++ enum USE_TYPE_E use_type) ++{ ++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state); ++ VCHIQ_STATUS_T ret = VCHIQ_SUCCESS; ++ char entity[16]; ++ int *entity_uc; ++ int local_uc, local_entity_uc; ++ ++ if (!arm_state) ++ goto out; ++ ++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__); ++ ++ if (use_type == USE_TYPE_VCHIQ) { ++ sprintf(entity, "VCHIQ: "); ++ entity_uc = &arm_state->peer_use_count; ++ } else if (service) { ++ sprintf(entity, "%c%c%c%c:%03d", ++ VCHIQ_FOURCC_AS_4CHARS(service->base.fourcc), ++ service->client_id); ++ entity_uc = &service->service_use_count; ++ } else { ++ vchiq_log_error(vchiq_susp_log_level, "%s null service " ++ "ptr", __func__); ++ ret = VCHIQ_ERROR; ++ goto out; ++ } ++ ++ write_lock_bh(&arm_state->susp_res_lock); ++ while (arm_state->resume_blocked) { ++ /* If we call 'use' while force suspend is waiting for suspend, ++ * then we're about to block the thread which the force is ++ * waiting to complete, so we're bound to just time out. In this ++ * case, set the suspend state such that the wait will be ++ * canceled, so we can complete as quickly as possible. */ ++ if (arm_state->resume_blocked && arm_state->vc_suspend_state == ++ VC_SUSPEND_IDLE) { ++ set_suspend_state(arm_state, VC_SUSPEND_FORCE_CANCELED); ++ break; ++ } ++ /* If suspend is already in progress then we need to block */ ++ if (!try_wait_for_completion(&arm_state->resume_blocker)) { ++ /* Indicate that there are threads waiting on the resume ++ * blocker. These need to be allowed to complete before ++ * a _second_ call to force suspend can complete, ++ * otherwise low priority threads might never actually ++ * continue */ ++ arm_state->blocked_count++; ++ write_unlock_bh(&arm_state->susp_res_lock); ++ vchiq_log_info(vchiq_susp_log_level, "%s %s resume " ++ "blocked - waiting...", __func__, entity); ++ if (wait_for_completion_killable( ++ &arm_state->resume_blocker) != 0) { ++ vchiq_log_error(vchiq_susp_log_level, "%s %s " ++ "wait for resume blocker interrupted", ++ __func__, entity); ++ ret = VCHIQ_ERROR; ++ write_lock_bh(&arm_state->susp_res_lock); ++ arm_state->blocked_count--; ++ write_unlock_bh(&arm_state->susp_res_lock); ++ goto out; ++ } ++ vchiq_log_info(vchiq_susp_log_level, "%s %s resume " ++ "unblocked", __func__, entity); ++ write_lock_bh(&arm_state->susp_res_lock); ++ if (--arm_state->blocked_count == 0) ++ complete_all(&arm_state->blocked_blocker); ++ } ++ } ++ ++ stop_suspend_timer(arm_state); ++ ++ local_uc = ++arm_state->videocore_use_count; ++ local_entity_uc = ++(*entity_uc); ++ ++ /* If there's a pending request which hasn't yet been serviced then ++ * just clear it. If we're past VC_SUSPEND_REQUESTED state then ++ * vc_resume_complete will block until we either resume or fail to ++ * suspend */ ++ if (arm_state->vc_suspend_state <= VC_SUSPEND_REQUESTED) ++ set_suspend_state(arm_state, VC_SUSPEND_IDLE); ++ ++ if ((use_type != USE_TYPE_SERVICE_NO_RESUME) && need_resume(state)) { ++ set_resume_state(arm_state, VC_RESUME_REQUESTED); ++ vchiq_log_info(vchiq_susp_log_level, ++ "%s %s count %d, state count %d", ++ __func__, entity, local_entity_uc, local_uc); ++ request_poll(state, NULL, 0); ++ } else ++ vchiq_log_trace(vchiq_susp_log_level, ++ "%s %s count %d, state count %d", ++ __func__, entity, *entity_uc, local_uc); ++ ++ ++ write_unlock_bh(&arm_state->susp_res_lock); ++ ++ /* Completion is in a done state when we're not suspended, so this won't ++ * block for the non-suspended case. */ ++ if (!try_wait_for_completion(&arm_state->vc_resume_complete)) { ++ vchiq_log_info(vchiq_susp_log_level, "%s %s wait for resume", ++ __func__, entity); ++ if (wait_for_completion_killable( ++ &arm_state->vc_resume_complete) != 0) { ++ vchiq_log_error(vchiq_susp_log_level, "%s %s wait for " ++ "resume interrupted", __func__, entity); ++ ret = VCHIQ_ERROR; ++ goto out; ++ } ++ vchiq_log_info(vchiq_susp_log_level, "%s %s resumed", __func__, ++ entity); ++ } ++ ++ if (ret == VCHIQ_SUCCESS) { ++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS; ++ long ack_cnt = atomic_xchg(&arm_state->ka_use_ack_count, 0); ++ while (ack_cnt && (status == VCHIQ_SUCCESS)) { ++ /* Send the use notify to videocore */ ++ status = vchiq_send_remote_use_active(state); ++ if (status == VCHIQ_SUCCESS) ++ ack_cnt--; ++ else ++ atomic_add(ack_cnt, ++ &arm_state->ka_use_ack_count); ++ } ++ } ++ ++out: ++ vchiq_log_trace(vchiq_susp_log_level, "%s exit %d", __func__, ret); ++ return ret; ++} ++ ++VCHIQ_STATUS_T ++vchiq_release_internal(VCHIQ_STATE_T *state, VCHIQ_SERVICE_T *service) ++{ ++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state); ++ VCHIQ_STATUS_T ret = VCHIQ_SUCCESS; ++ char entity[16]; ++ int *entity_uc; ++ int local_uc, local_entity_uc; ++ ++ if (!arm_state) ++ goto out; ++ ++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__); ++ ++ if (service) { ++ sprintf(entity, "%c%c%c%c:%03d", ++ VCHIQ_FOURCC_AS_4CHARS(service->base.fourcc), ++ service->client_id); ++ entity_uc = &service->service_use_count; ++ } else { ++ sprintf(entity, "PEER: "); ++ entity_uc = &arm_state->peer_use_count; ++ } ++ ++ write_lock_bh(&arm_state->susp_res_lock); ++ if (!arm_state->videocore_use_count || !(*entity_uc)) { ++ /* Don't use BUG_ON - don't allow user thread to crash kernel */ ++ WARN_ON(!arm_state->videocore_use_count); ++ WARN_ON(!(*entity_uc)); ++ ret = VCHIQ_ERROR; ++ goto unlock; ++ } ++ local_uc = --arm_state->videocore_use_count; ++ local_entity_uc = --(*entity_uc); ++ ++ if (!vchiq_videocore_wanted(state)) { ++ if (vchiq_platform_use_suspend_timer() && ++ !arm_state->resume_blocked) { ++ /* Only use the timer if we're not trying to force ++ * suspend (=> resume_blocked) */ ++ start_suspend_timer(arm_state); ++ } else { ++ vchiq_log_info(vchiq_susp_log_level, ++ "%s %s count %d, state count %d - suspending", ++ __func__, entity, *entity_uc, ++ arm_state->videocore_use_count); ++ vchiq_arm_vcsuspend(state); ++ } ++ } else ++ vchiq_log_trace(vchiq_susp_log_level, ++ "%s %s count %d, state count %d", ++ __func__, entity, *entity_uc, ++ arm_state->videocore_use_count); ++ ++unlock: ++ write_unlock_bh(&arm_state->susp_res_lock); ++ ++out: ++ vchiq_log_trace(vchiq_susp_log_level, "%s exit %d", __func__, ret); ++ return ret; ++} ++ ++void ++vchiq_on_remote_use(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state); ++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__); ++ atomic_inc(&arm_state->ka_use_count); ++ complete(&arm_state->ka_evt); ++} ++ ++void ++vchiq_on_remote_release(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state); ++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__); ++ atomic_inc(&arm_state->ka_release_count); ++ complete(&arm_state->ka_evt); ++} ++ ++VCHIQ_STATUS_T ++vchiq_use_service_internal(VCHIQ_SERVICE_T *service) ++{ ++ return vchiq_use_internal(service->state, service, USE_TYPE_SERVICE); ++} ++ ++VCHIQ_STATUS_T ++vchiq_release_service_internal(VCHIQ_SERVICE_T *service) ++{ ++ return vchiq_release_internal(service->state, service); ++} ++ ++VCHIQ_DEBUGFS_NODE_T * ++vchiq_instance_get_debugfs_node(VCHIQ_INSTANCE_T instance) ++{ ++ return &instance->debugfs_node; ++} ++ ++int ++vchiq_instance_get_use_count(VCHIQ_INSTANCE_T instance) ++{ ++ VCHIQ_SERVICE_T *service; ++ int use_count = 0, i; ++ i = 0; ++ while ((service = next_service_by_instance(instance->state, ++ instance, &i)) != NULL) { ++ use_count += service->service_use_count; ++ unlock_service(service); ++ } ++ return use_count; ++} ++ ++int ++vchiq_instance_get_pid(VCHIQ_INSTANCE_T instance) ++{ ++ return instance->pid; ++} ++ ++int ++vchiq_instance_get_trace(VCHIQ_INSTANCE_T instance) ++{ ++ return instance->trace; ++} ++ ++void ++vchiq_instance_set_trace(VCHIQ_INSTANCE_T instance, int trace) ++{ ++ VCHIQ_SERVICE_T *service; ++ int i; ++ i = 0; ++ while ((service = next_service_by_instance(instance->state, ++ instance, &i)) != NULL) { ++ service->trace = trace; ++ unlock_service(service); ++ } ++ instance->trace = (trace != 0); ++} ++ ++static void suspend_timer_callback(unsigned long context) ++{ ++ VCHIQ_STATE_T *state = (VCHIQ_STATE_T *)context; ++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state); ++ if (!arm_state) ++ goto out; ++ vchiq_log_info(vchiq_susp_log_level, ++ "%s - suspend timer expired - check suspend", __func__); ++ vchiq_check_suspend(state); ++out: ++ return; ++} ++ ++VCHIQ_STATUS_T ++vchiq_use_service_no_resume(VCHIQ_SERVICE_HANDLE_T handle) ++{ ++ VCHIQ_STATUS_T ret = VCHIQ_ERROR; ++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle); ++ if (service) { ++ ret = vchiq_use_internal(service->state, service, ++ USE_TYPE_SERVICE_NO_RESUME); ++ unlock_service(service); ++ } ++ return ret; ++} ++ ++VCHIQ_STATUS_T ++vchiq_use_service(VCHIQ_SERVICE_HANDLE_T handle) ++{ ++ VCHIQ_STATUS_T ret = VCHIQ_ERROR; ++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle); ++ if (service) { ++ ret = vchiq_use_internal(service->state, service, ++ USE_TYPE_SERVICE); ++ unlock_service(service); ++ } ++ return ret; ++} ++ ++VCHIQ_STATUS_T ++vchiq_release_service(VCHIQ_SERVICE_HANDLE_T handle) ++{ ++ VCHIQ_STATUS_T ret = VCHIQ_ERROR; ++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle); ++ if (service) { ++ ret = vchiq_release_internal(service->state, service); ++ unlock_service(service); ++ } ++ return ret; ++} ++ ++void ++vchiq_dump_service_use_state(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state); ++ int i, j = 0; ++ /* Only dump 64 services */ ++ static const int local_max_services = 64; ++ /* If there's more than 64 services, only dump ones with ++ * non-zero counts */ ++ int only_nonzero = 0; ++ static const char *nz = "<-- preventing suspend"; ++ ++ enum vc_suspend_status vc_suspend_state; ++ enum vc_resume_status vc_resume_state; ++ int peer_count; ++ int vc_use_count; ++ int active_services; ++ struct service_data_struct { ++ int fourcc; ++ int clientid; ++ int use_count; ++ } service_data[local_max_services]; ++ ++ if (!arm_state) ++ return; ++ ++ read_lock_bh(&arm_state->susp_res_lock); ++ vc_suspend_state = arm_state->vc_suspend_state; ++ vc_resume_state = arm_state->vc_resume_state; ++ peer_count = arm_state->peer_use_count; ++ vc_use_count = arm_state->videocore_use_count; ++ active_services = state->unused_service; ++ if (active_services > local_max_services) ++ only_nonzero = 1; ++ ++ for (i = 0; (i < active_services) && (j < local_max_services); i++) { ++ VCHIQ_SERVICE_T *service_ptr = state->services[i]; ++ if (!service_ptr) ++ continue; ++ ++ if (only_nonzero && !service_ptr->service_use_count) ++ continue; ++ ++ if (service_ptr->srvstate != VCHIQ_SRVSTATE_FREE) { ++ service_data[j].fourcc = service_ptr->base.fourcc; ++ service_data[j].clientid = service_ptr->client_id; ++ service_data[j++].use_count = service_ptr-> ++ service_use_count; ++ } ++ } ++ ++ read_unlock_bh(&arm_state->susp_res_lock); ++ ++ vchiq_log_warning(vchiq_susp_log_level, ++ "-- Videcore suspend state: %s --", ++ suspend_state_names[vc_suspend_state + VC_SUSPEND_NUM_OFFSET]); ++ vchiq_log_warning(vchiq_susp_log_level, ++ "-- Videcore resume state: %s --", ++ resume_state_names[vc_resume_state + VC_RESUME_NUM_OFFSET]); ++ ++ if (only_nonzero) ++ vchiq_log_warning(vchiq_susp_log_level, "Too many active " ++ "services (%d). Only dumping up to first %d services " ++ "with non-zero use-count", active_services, ++ local_max_services); ++ ++ for (i = 0; i < j; i++) { ++ vchiq_log_warning(vchiq_susp_log_level, ++ "----- %c%c%c%c:%d service count %d %s", ++ VCHIQ_FOURCC_AS_4CHARS(service_data[i].fourcc), ++ service_data[i].clientid, ++ service_data[i].use_count, ++ service_data[i].use_count ? nz : ""); ++ } ++ vchiq_log_warning(vchiq_susp_log_level, ++ "----- VCHIQ use count count %d", peer_count); ++ vchiq_log_warning(vchiq_susp_log_level, ++ "--- Overall vchiq instance use count %d", vc_use_count); ++ ++ vchiq_dump_platform_use_state(state); ++} ++ ++VCHIQ_STATUS_T ++vchiq_check_service(VCHIQ_SERVICE_T *service) ++{ ++ VCHIQ_ARM_STATE_T *arm_state; ++ VCHIQ_STATUS_T ret = VCHIQ_ERROR; ++ ++ if (!service || !service->state) ++ goto out; ++ ++ vchiq_log_trace(vchiq_susp_log_level, "%s", __func__); ++ ++ arm_state = vchiq_platform_get_arm_state(service->state); ++ ++ read_lock_bh(&arm_state->susp_res_lock); ++ if (service->service_use_count) ++ ret = VCHIQ_SUCCESS; ++ read_unlock_bh(&arm_state->susp_res_lock); ++ ++ if (ret == VCHIQ_ERROR) { ++ vchiq_log_error(vchiq_susp_log_level, ++ "%s ERROR - %c%c%c%c:%d service count %d, " ++ "state count %d, videocore suspend state %s", __func__, ++ VCHIQ_FOURCC_AS_4CHARS(service->base.fourcc), ++ service->client_id, service->service_use_count, ++ arm_state->videocore_use_count, ++ suspend_state_names[arm_state->vc_suspend_state + ++ VC_SUSPEND_NUM_OFFSET]); ++ vchiq_dump_service_use_state(service->state); ++ } ++out: ++ return ret; ++} ++ ++/* stub functions */ ++void vchiq_on_remote_use_active(VCHIQ_STATE_T *state) ++{ ++ (void)state; ++} ++ ++void vchiq_platform_conn_state_changed(VCHIQ_STATE_T *state, ++ VCHIQ_CONNSTATE_T oldstate, VCHIQ_CONNSTATE_T newstate) ++{ ++ VCHIQ_ARM_STATE_T *arm_state = vchiq_platform_get_arm_state(state); ++ vchiq_log_info(vchiq_susp_log_level, "%d: %s->%s", state->id, ++ get_conn_state_name(oldstate), get_conn_state_name(newstate)); ++ if (state->conn_state == VCHIQ_CONNSTATE_CONNECTED) { ++ write_lock_bh(&arm_state->susp_res_lock); ++ if (!arm_state->first_connect) { ++ char threadname[10]; ++ arm_state->first_connect = 1; ++ write_unlock_bh(&arm_state->susp_res_lock); ++ snprintf(threadname, sizeof(threadname), "VCHIQka-%d", ++ state->id); ++ arm_state->ka_thread = kthread_create( ++ &vchiq_keepalive_thread_func, ++ (void *)state, ++ threadname); ++ if (arm_state->ka_thread == NULL) { ++ vchiq_log_error(vchiq_susp_log_level, ++ "vchiq: FATAL: couldn't create thread %s", ++ threadname); ++ } else { ++ wake_up_process(arm_state->ka_thread); ++ } ++ } else ++ write_unlock_bh(&arm_state->susp_res_lock); ++ } ++} ++ ++static int vchiq_probe(struct platform_device *pdev) ++{ ++ struct device_node *fw_node; ++ struct rpi_firmware *fw; ++ int err; ++ void *ptr_err; ++ ++ fw_node = of_parse_phandle(pdev->dev.of_node, "firmware", 0); ++/* Remove comment when booting without Device Tree is no longer supported ++ if (!fw_node) { ++ dev_err(&pdev->dev, "Missing firmware node\n"); ++ return -ENOENT; ++ } ++*/ ++ fw = rpi_firmware_get(fw_node); ++ if (!fw) ++ return -EPROBE_DEFER; ++ ++ platform_set_drvdata(pdev, fw); ++ ++ /* create debugfs entries */ ++ err = vchiq_debugfs_init(); ++ if (err != 0) ++ goto failed_debugfs_init; ++ ++ err = alloc_chrdev_region(&vchiq_devid, VCHIQ_MINOR, 1, DEVICE_NAME); ++ if (err != 0) { ++ vchiq_log_error(vchiq_arm_log_level, ++ "Unable to allocate device number"); ++ goto failed_alloc_chrdev; ++ } ++ cdev_init(&vchiq_cdev, &vchiq_fops); ++ vchiq_cdev.owner = THIS_MODULE; ++ err = cdev_add(&vchiq_cdev, vchiq_devid, 1); ++ if (err != 0) { ++ vchiq_log_error(vchiq_arm_log_level, ++ "Unable to register device"); ++ goto failed_cdev_add; ++ } ++ ++ /* create sysfs entries */ ++ vchiq_class = class_create(THIS_MODULE, DEVICE_NAME); ++ ptr_err = vchiq_class; ++ if (IS_ERR(ptr_err)) ++ goto failed_class_create; ++ ++ vchiq_dev = device_create(vchiq_class, NULL, ++ vchiq_devid, NULL, "vchiq"); ++ ptr_err = vchiq_dev; ++ if (IS_ERR(ptr_err)) ++ goto failed_device_create; ++ ++ err = vchiq_platform_init(pdev, &g_state); ++ if (err != 0) ++ goto failed_platform_init; ++ ++ vchiq_log_info(vchiq_arm_log_level, ++ "vchiq: initialised - version %d (min %d), device %d.%d", ++ VCHIQ_VERSION, VCHIQ_VERSION_MIN, ++ MAJOR(vchiq_devid), MINOR(vchiq_devid)); ++ ++ return 0; ++ ++failed_platform_init: ++ device_destroy(vchiq_class, vchiq_devid); ++failed_device_create: ++ class_destroy(vchiq_class); ++failed_class_create: ++ cdev_del(&vchiq_cdev); ++ err = PTR_ERR(ptr_err); ++failed_cdev_add: ++ unregister_chrdev_region(vchiq_devid, 1); ++failed_alloc_chrdev: ++ vchiq_debugfs_deinit(); ++failed_debugfs_init: ++ vchiq_log_warning(vchiq_arm_log_level, "could not load vchiq"); ++ return err; ++} ++ ++static int vchiq_remove(struct platform_device *pdev) ++{ ++ device_destroy(vchiq_class, vchiq_devid); ++ class_destroy(vchiq_class); ++ cdev_del(&vchiq_cdev); ++ unregister_chrdev_region(vchiq_devid, 1); ++ ++ return 0; ++} ++ ++static const struct of_device_id vchiq_of_match[] = { ++ { .compatible = "brcm,bcm2835-vchiq", }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, vchiq_of_match); ++ ++static struct platform_driver vchiq_driver = { ++ .driver = { ++ .name = "bcm2835_vchiq", ++ .owner = THIS_MODULE, ++ .of_match_table = vchiq_of_match, ++ }, ++ .probe = vchiq_probe, ++ .remove = vchiq_remove, ++}; ++module_platform_driver(vchiq_driver); ++ ++MODULE_LICENSE("GPL"); ++MODULE_AUTHOR("Broadcom Corporation"); +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_arm.h +@@ -0,0 +1,220 @@ ++/** ++ * Copyright (c) 2014 Raspberry Pi (Trading) Ltd. All rights reserved. ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#ifndef VCHIQ_ARM_H ++#define VCHIQ_ARM_H ++ ++#include <linux/mutex.h> ++#include <linux/platform_device.h> ++#include <linux/semaphore.h> ++#include <linux/atomic.h> ++#include "vchiq_core.h" ++#include "vchiq_debugfs.h" ++ ++ ++enum vc_suspend_status { ++ VC_SUSPEND_FORCE_CANCELED = -3, /* Force suspend canceled, too busy */ ++ VC_SUSPEND_REJECTED = -2, /* Videocore rejected suspend request */ ++ VC_SUSPEND_FAILED = -1, /* Videocore suspend failed */ ++ VC_SUSPEND_IDLE = 0, /* VC active, no suspend actions */ ++ VC_SUSPEND_REQUESTED, /* User has requested suspend */ ++ VC_SUSPEND_IN_PROGRESS, /* Slot handler has recvd suspend request */ ++ VC_SUSPEND_SUSPENDED /* Videocore suspend succeeded */ ++}; ++ ++enum vc_resume_status { ++ VC_RESUME_FAILED = -1, /* Videocore resume failed */ ++ VC_RESUME_IDLE = 0, /* VC suspended, no resume actions */ ++ VC_RESUME_REQUESTED, /* User has requested resume */ ++ VC_RESUME_IN_PROGRESS, /* Slot handler has received resume request */ ++ VC_RESUME_RESUMED /* Videocore resumed successfully (active) */ ++}; ++ ++ ++enum USE_TYPE_E { ++ USE_TYPE_SERVICE, ++ USE_TYPE_SERVICE_NO_RESUME, ++ USE_TYPE_VCHIQ ++}; ++ ++ ++ ++typedef struct vchiq_arm_state_struct { ++ /* Keepalive-related data */ ++ struct task_struct *ka_thread; ++ struct completion ka_evt; ++ atomic_t ka_use_count; ++ atomic_t ka_use_ack_count; ++ atomic_t ka_release_count; ++ ++ struct completion vc_suspend_complete; ++ struct completion vc_resume_complete; ++ ++ rwlock_t susp_res_lock; ++ enum vc_suspend_status vc_suspend_state; ++ enum vc_resume_status vc_resume_state; ++ ++ unsigned int wake_address; ++ ++ struct timer_list suspend_timer; ++ int suspend_timer_timeout; ++ int suspend_timer_running; ++ ++ /* Global use count for videocore. ++ ** This is equal to the sum of the use counts for all services. When ++ ** this hits zero the videocore suspend procedure will be initiated. ++ */ ++ int videocore_use_count; ++ ++ /* Use count to track requests from videocore peer. ++ ** This use count is not associated with a service, so needs to be ++ ** tracked separately with the state. ++ */ ++ int peer_use_count; ++ ++ /* Flag to indicate whether resume is blocked. This happens when the ++ ** ARM is suspending ++ */ ++ struct completion resume_blocker; ++ int resume_blocked; ++ struct completion blocked_blocker; ++ int blocked_count; ++ ++ int autosuspend_override; ++ ++ /* Flag to indicate that the first vchiq connect has made it through. ++ ** This means that both sides should be fully ready, and we should ++ ** be able to suspend after this point. ++ */ ++ int first_connect; ++ ++ unsigned long long suspend_start_time; ++ unsigned long long sleep_start_time; ++ unsigned long long resume_start_time; ++ unsigned long long last_wake_time; ++ ++} VCHIQ_ARM_STATE_T; ++ ++extern int vchiq_arm_log_level; ++extern int vchiq_susp_log_level; ++ ++int vchiq_platform_init(struct platform_device *pdev, VCHIQ_STATE_T *state); ++ ++extern VCHIQ_STATE_T * ++vchiq_get_state(void); ++ ++extern VCHIQ_STATUS_T ++vchiq_arm_vcsuspend(VCHIQ_STATE_T *state); ++ ++extern VCHIQ_STATUS_T ++vchiq_arm_force_suspend(VCHIQ_STATE_T *state); ++ ++extern int ++vchiq_arm_allow_resume(VCHIQ_STATE_T *state); ++ ++extern VCHIQ_STATUS_T ++vchiq_arm_vcresume(VCHIQ_STATE_T *state); ++ ++extern VCHIQ_STATUS_T ++vchiq_arm_init_state(VCHIQ_STATE_T *state, VCHIQ_ARM_STATE_T *arm_state); ++ ++extern int ++vchiq_check_resume(VCHIQ_STATE_T *state); ++ ++extern void ++vchiq_check_suspend(VCHIQ_STATE_T *state); ++ VCHIQ_STATUS_T ++vchiq_use_service(VCHIQ_SERVICE_HANDLE_T handle); ++ ++extern VCHIQ_STATUS_T ++vchiq_release_service(VCHIQ_SERVICE_HANDLE_T handle); ++ ++extern VCHIQ_STATUS_T ++vchiq_check_service(VCHIQ_SERVICE_T *service); ++ ++extern VCHIQ_STATUS_T ++vchiq_platform_suspend(VCHIQ_STATE_T *state); ++ ++extern int ++vchiq_platform_videocore_wanted(VCHIQ_STATE_T *state); ++ ++extern int ++vchiq_platform_use_suspend_timer(void); ++ ++extern void ++vchiq_dump_platform_use_state(VCHIQ_STATE_T *state); ++ ++extern void ++vchiq_dump_service_use_state(VCHIQ_STATE_T *state); ++ ++extern VCHIQ_ARM_STATE_T* ++vchiq_platform_get_arm_state(VCHIQ_STATE_T *state); ++ ++extern int ++vchiq_videocore_wanted(VCHIQ_STATE_T *state); ++ ++extern VCHIQ_STATUS_T ++vchiq_use_internal(VCHIQ_STATE_T *state, VCHIQ_SERVICE_T *service, ++ enum USE_TYPE_E use_type); ++extern VCHIQ_STATUS_T ++vchiq_release_internal(VCHIQ_STATE_T *state, VCHIQ_SERVICE_T *service); ++ ++extern VCHIQ_DEBUGFS_NODE_T * ++vchiq_instance_get_debugfs_node(VCHIQ_INSTANCE_T instance); ++ ++extern int ++vchiq_instance_get_use_count(VCHIQ_INSTANCE_T instance); ++ ++extern int ++vchiq_instance_get_pid(VCHIQ_INSTANCE_T instance); ++ ++extern int ++vchiq_instance_get_trace(VCHIQ_INSTANCE_T instance); ++ ++extern void ++vchiq_instance_set_trace(VCHIQ_INSTANCE_T instance, int trace); ++ ++extern void ++set_suspend_state(VCHIQ_ARM_STATE_T *arm_state, ++ enum vc_suspend_status new_state); ++ ++extern void ++set_resume_state(VCHIQ_ARM_STATE_T *arm_state, ++ enum vc_resume_status new_state); ++ ++extern void ++start_suspend_timer(VCHIQ_ARM_STATE_T *arm_state); ++ ++ ++#endif /* VCHIQ_ARM_H */ +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_build_info.h +@@ -0,0 +1,37 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++const char *vchiq_get_build_hostname(void); ++const char *vchiq_get_build_version(void); ++const char *vchiq_get_build_time(void); ++const char *vchiq_get_build_date(void); +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_cfg.h +@@ -0,0 +1,69 @@ ++/** ++ * Copyright (c) 2010-2014 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#ifndef VCHIQ_CFG_H ++#define VCHIQ_CFG_H ++ ++#define VCHIQ_MAGIC VCHIQ_MAKE_FOURCC('V', 'C', 'H', 'I') ++/* The version of VCHIQ - change with any non-trivial change */ ++#define VCHIQ_VERSION 8 ++/* The minimum compatible version - update to match VCHIQ_VERSION with any ++** incompatible change */ ++#define VCHIQ_VERSION_MIN 3 ++ ++/* The version that introduced the VCHIQ_IOC_LIB_VERSION ioctl */ ++#define VCHIQ_VERSION_LIB_VERSION 7 ++ ++/* The version that introduced the VCHIQ_IOC_CLOSE_DELIVERED ioctl */ ++#define VCHIQ_VERSION_CLOSE_DELIVERED 7 ++ ++/* The version that made it safe to use SYNCHRONOUS mode */ ++#define VCHIQ_VERSION_SYNCHRONOUS_MODE 8 ++ ++#define VCHIQ_MAX_STATES 1 ++#define VCHIQ_MAX_SERVICES 4096 ++#define VCHIQ_MAX_SLOTS 128 ++#define VCHIQ_MAX_SLOTS_PER_SIDE 64 ++ ++#define VCHIQ_NUM_CURRENT_BULKS 32 ++#define VCHIQ_NUM_SERVICE_BULKS 4 ++ ++#ifndef VCHIQ_ENABLE_DEBUG ++#define VCHIQ_ENABLE_DEBUG 1 ++#endif ++ ++#ifndef VCHIQ_ENABLE_STATS ++#define VCHIQ_ENABLE_STATS 1 ++#endif ++ ++#endif /* VCHIQ_CFG_H */ +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_connected.c +@@ -0,0 +1,120 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#include "vchiq_connected.h" ++#include "vchiq_core.h" ++#include "vchiq_killable.h" ++#include <linux/module.h> ++#include <linux/mutex.h> ++ ++#define MAX_CALLBACKS 10 ++ ++static int g_connected; ++static int g_num_deferred_callbacks; ++static VCHIQ_CONNECTED_CALLBACK_T g_deferred_callback[MAX_CALLBACKS]; ++static int g_once_init; ++static struct mutex g_connected_mutex; ++ ++/**************************************************************************** ++* ++* Function to initialize our lock. ++* ++***************************************************************************/ ++ ++static void connected_init(void) ++{ ++ if (!g_once_init) { ++ mutex_init(&g_connected_mutex); ++ g_once_init = 1; ++ } ++} ++ ++/**************************************************************************** ++* ++* This function is used to defer initialization until the vchiq stack is ++* initialized. If the stack is already initialized, then the callback will ++* be made immediately, otherwise it will be deferred until ++* vchiq_call_connected_callbacks is called. ++* ++***************************************************************************/ ++ ++void vchiq_add_connected_callback(VCHIQ_CONNECTED_CALLBACK_T callback) ++{ ++ connected_init(); ++ ++ if (mutex_lock_interruptible(&g_connected_mutex) != 0) ++ return; ++ ++ if (g_connected) ++ /* We're already connected. Call the callback immediately. */ ++ ++ callback(); ++ else { ++ if (g_num_deferred_callbacks >= MAX_CALLBACKS) ++ vchiq_log_error(vchiq_core_log_level, ++ "There already %d callback registered - " ++ "please increase MAX_CALLBACKS", ++ g_num_deferred_callbacks); ++ else { ++ g_deferred_callback[g_num_deferred_callbacks] = ++ callback; ++ g_num_deferred_callbacks++; ++ } ++ } ++ mutex_unlock(&g_connected_mutex); ++} ++ ++/**************************************************************************** ++* ++* This function is called by the vchiq stack once it has been connected to ++* the videocore and clients can start to use the stack. ++* ++***************************************************************************/ ++ ++void vchiq_call_connected_callbacks(void) ++{ ++ int i; ++ ++ connected_init(); ++ ++ if (mutex_lock_interruptible(&g_connected_mutex) != 0) ++ return; ++ ++ for (i = 0; i < g_num_deferred_callbacks; i++) ++ g_deferred_callback[i](); ++ ++ g_num_deferred_callbacks = 0; ++ g_connected = 1; ++ mutex_unlock(&g_connected_mutex); ++} ++EXPORT_SYMBOL(vchiq_add_connected_callback); +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_connected.h +@@ -0,0 +1,50 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#ifndef VCHIQ_CONNECTED_H ++#define VCHIQ_CONNECTED_H ++ ++/* ---- Include Files ----------------------------------------------------- */ ++ ++/* ---- Constants and Types ---------------------------------------------- */ ++ ++typedef void (*VCHIQ_CONNECTED_CALLBACK_T)(void); ++ ++/* ---- Variable Externs ------------------------------------------------- */ ++ ++/* ---- Function Prototypes ---------------------------------------------- */ ++ ++void vchiq_add_connected_callback(VCHIQ_CONNECTED_CALLBACK_T callback); ++void vchiq_call_connected_callbacks(void); ++ ++#endif /* VCHIQ_CONNECTED_H */ +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_core.c +@@ -0,0 +1,3934 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#include "vchiq_core.h" ++#include "vchiq_killable.h" ++ ++#define VCHIQ_SLOT_HANDLER_STACK 8192 ++ ++#define HANDLE_STATE_SHIFT 12 ++ ++#define SLOT_INFO_FROM_INDEX(state, index) (state->slot_info + (index)) ++#define SLOT_DATA_FROM_INDEX(state, index) (state->slot_data + (index)) ++#define SLOT_INDEX_FROM_DATA(state, data) \ ++ (((unsigned int)((char *)data - (char *)state->slot_data)) / \ ++ VCHIQ_SLOT_SIZE) ++#define SLOT_INDEX_FROM_INFO(state, info) \ ++ ((unsigned int)(info - state->slot_info)) ++#define SLOT_QUEUE_INDEX_FROM_POS(pos) \ ++ ((int)((unsigned int)(pos) / VCHIQ_SLOT_SIZE)) ++ ++#define BULK_INDEX(x) (x & (VCHIQ_NUM_SERVICE_BULKS - 1)) ++ ++#define SRVTRACE_LEVEL(srv) \ ++ (((srv) && (srv)->trace) ? VCHIQ_LOG_TRACE : vchiq_core_msg_log_level) ++#define SRVTRACE_ENABLED(srv, lev) \ ++ (((srv) && (srv)->trace) || (vchiq_core_msg_log_level >= (lev))) ++ ++struct vchiq_open_payload { ++ int fourcc; ++ int client_id; ++ short version; ++ short version_min; ++}; ++ ++struct vchiq_openack_payload { ++ short version; ++}; ++ ++enum ++{ ++ QMFLAGS_IS_BLOCKING = (1 << 0), ++ QMFLAGS_NO_MUTEX_LOCK = (1 << 1), ++ QMFLAGS_NO_MUTEX_UNLOCK = (1 << 2) ++}; ++ ++/* we require this for consistency between endpoints */ ++vchiq_static_assert(sizeof(VCHIQ_HEADER_T) == 8); ++vchiq_static_assert(IS_POW2(sizeof(VCHIQ_HEADER_T))); ++vchiq_static_assert(IS_POW2(VCHIQ_NUM_CURRENT_BULKS)); ++vchiq_static_assert(IS_POW2(VCHIQ_NUM_SERVICE_BULKS)); ++vchiq_static_assert(IS_POW2(VCHIQ_MAX_SERVICES)); ++vchiq_static_assert(VCHIQ_VERSION >= VCHIQ_VERSION_MIN); ++ ++/* Run time control of log level, based on KERN_XXX level. */ ++int vchiq_core_log_level = VCHIQ_LOG_DEFAULT; ++int vchiq_core_msg_log_level = VCHIQ_LOG_DEFAULT; ++int vchiq_sync_log_level = VCHIQ_LOG_DEFAULT; ++ ++static atomic_t pause_bulks_count = ATOMIC_INIT(0); ++ ++static DEFINE_SPINLOCK(service_spinlock); ++DEFINE_SPINLOCK(bulk_waiter_spinlock); ++DEFINE_SPINLOCK(quota_spinlock); ++ ++VCHIQ_STATE_T *vchiq_states[VCHIQ_MAX_STATES]; ++static unsigned int handle_seq; ++ ++static const char *const srvstate_names[] = { ++ "FREE", ++ "HIDDEN", ++ "LISTENING", ++ "OPENING", ++ "OPEN", ++ "OPENSYNC", ++ "CLOSESENT", ++ "CLOSERECVD", ++ "CLOSEWAIT", ++ "CLOSED" ++}; ++ ++static const char *const reason_names[] = { ++ "SERVICE_OPENED", ++ "SERVICE_CLOSED", ++ "MESSAGE_AVAILABLE", ++ "BULK_TRANSMIT_DONE", ++ "BULK_RECEIVE_DONE", ++ "BULK_TRANSMIT_ABORTED", ++ "BULK_RECEIVE_ABORTED" ++}; ++ ++static const char *const conn_state_names[] = { ++ "DISCONNECTED", ++ "CONNECTING", ++ "CONNECTED", ++ "PAUSING", ++ "PAUSE_SENT", ++ "PAUSED", ++ "RESUMING", ++ "PAUSE_TIMEOUT", ++ "RESUME_TIMEOUT" ++}; ++ ++ ++static void ++release_message_sync(VCHIQ_STATE_T *state, VCHIQ_HEADER_T *header); ++ ++static const char *msg_type_str(unsigned int msg_type) ++{ ++ switch (msg_type) { ++ case VCHIQ_MSG_PADDING: return "PADDING"; ++ case VCHIQ_MSG_CONNECT: return "CONNECT"; ++ case VCHIQ_MSG_OPEN: return "OPEN"; ++ case VCHIQ_MSG_OPENACK: return "OPENACK"; ++ case VCHIQ_MSG_CLOSE: return "CLOSE"; ++ case VCHIQ_MSG_DATA: return "DATA"; ++ case VCHIQ_MSG_BULK_RX: return "BULK_RX"; ++ case VCHIQ_MSG_BULK_TX: return "BULK_TX"; ++ case VCHIQ_MSG_BULK_RX_DONE: return "BULK_RX_DONE"; ++ case VCHIQ_MSG_BULK_TX_DONE: return "BULK_TX_DONE"; ++ case VCHIQ_MSG_PAUSE: return "PAUSE"; ++ case VCHIQ_MSG_RESUME: return "RESUME"; ++ case VCHIQ_MSG_REMOTE_USE: return "REMOTE_USE"; ++ case VCHIQ_MSG_REMOTE_RELEASE: return "REMOTE_RELEASE"; ++ case VCHIQ_MSG_REMOTE_USE_ACTIVE: return "REMOTE_USE_ACTIVE"; ++ } ++ return "???"; ++} ++ ++static inline void ++vchiq_set_service_state(VCHIQ_SERVICE_T *service, int newstate) ++{ ++ vchiq_log_info(vchiq_core_log_level, "%d: srv:%d %s->%s", ++ service->state->id, service->localport, ++ srvstate_names[service->srvstate], ++ srvstate_names[newstate]); ++ service->srvstate = newstate; ++} ++ ++VCHIQ_SERVICE_T * ++find_service_by_handle(VCHIQ_SERVICE_HANDLE_T handle) ++{ ++ VCHIQ_SERVICE_T *service; ++ ++ spin_lock(&service_spinlock); ++ service = handle_to_service(handle); ++ if (service && (service->srvstate != VCHIQ_SRVSTATE_FREE) && ++ (service->handle == handle)) { ++ BUG_ON(service->ref_count == 0); ++ service->ref_count++; ++ } else ++ service = NULL; ++ spin_unlock(&service_spinlock); ++ ++ if (!service) ++ vchiq_log_info(vchiq_core_log_level, ++ "Invalid service handle 0x%x", handle); ++ ++ return service; ++} ++ ++VCHIQ_SERVICE_T * ++find_service_by_port(VCHIQ_STATE_T *state, int localport) ++{ ++ VCHIQ_SERVICE_T *service = NULL; ++ if ((unsigned int)localport <= VCHIQ_PORT_MAX) { ++ spin_lock(&service_spinlock); ++ service = state->services[localport]; ++ if (service && (service->srvstate != VCHIQ_SRVSTATE_FREE)) { ++ BUG_ON(service->ref_count == 0); ++ service->ref_count++; ++ } else ++ service = NULL; ++ spin_unlock(&service_spinlock); ++ } ++ ++ if (!service) ++ vchiq_log_info(vchiq_core_log_level, ++ "Invalid port %d", localport); ++ ++ return service; ++} ++ ++VCHIQ_SERVICE_T * ++find_service_for_instance(VCHIQ_INSTANCE_T instance, ++ VCHIQ_SERVICE_HANDLE_T handle) { ++ VCHIQ_SERVICE_T *service; ++ ++ spin_lock(&service_spinlock); ++ service = handle_to_service(handle); ++ if (service && (service->srvstate != VCHIQ_SRVSTATE_FREE) && ++ (service->handle == handle) && ++ (service->instance == instance)) { ++ BUG_ON(service->ref_count == 0); ++ service->ref_count++; ++ } else ++ service = NULL; ++ spin_unlock(&service_spinlock); ++ ++ if (!service) ++ vchiq_log_info(vchiq_core_log_level, ++ "Invalid service handle 0x%x", handle); ++ ++ return service; ++} ++ ++VCHIQ_SERVICE_T * ++find_closed_service_for_instance(VCHIQ_INSTANCE_T instance, ++ VCHIQ_SERVICE_HANDLE_T handle) { ++ VCHIQ_SERVICE_T *service; ++ ++ spin_lock(&service_spinlock); ++ service = handle_to_service(handle); ++ if (service && ++ ((service->srvstate == VCHIQ_SRVSTATE_FREE) || ++ (service->srvstate == VCHIQ_SRVSTATE_CLOSED)) && ++ (service->handle == handle) && ++ (service->instance == instance)) { ++ BUG_ON(service->ref_count == 0); ++ service->ref_count++; ++ } else ++ service = NULL; ++ spin_unlock(&service_spinlock); ++ ++ if (!service) ++ vchiq_log_info(vchiq_core_log_level, ++ "Invalid service handle 0x%x", handle); ++ ++ return service; ++} ++ ++VCHIQ_SERVICE_T * ++next_service_by_instance(VCHIQ_STATE_T *state, VCHIQ_INSTANCE_T instance, ++ int *pidx) ++{ ++ VCHIQ_SERVICE_T *service = NULL; ++ int idx = *pidx; ++ ++ spin_lock(&service_spinlock); ++ while (idx < state->unused_service) { ++ VCHIQ_SERVICE_T *srv = state->services[idx++]; ++ if (srv && (srv->srvstate != VCHIQ_SRVSTATE_FREE) && ++ (srv->instance == instance)) { ++ service = srv; ++ BUG_ON(service->ref_count == 0); ++ service->ref_count++; ++ break; ++ } ++ } ++ spin_unlock(&service_spinlock); ++ ++ *pidx = idx; ++ ++ return service; ++} ++ ++void ++lock_service(VCHIQ_SERVICE_T *service) ++{ ++ spin_lock(&service_spinlock); ++ BUG_ON(!service || (service->ref_count == 0)); ++ if (service) ++ service->ref_count++; ++ spin_unlock(&service_spinlock); ++} ++ ++void ++unlock_service(VCHIQ_SERVICE_T *service) ++{ ++ VCHIQ_STATE_T *state = service->state; ++ spin_lock(&service_spinlock); ++ BUG_ON(!service || (service->ref_count == 0)); ++ if (service && service->ref_count) { ++ service->ref_count--; ++ if (!service->ref_count) { ++ BUG_ON(service->srvstate != VCHIQ_SRVSTATE_FREE); ++ state->services[service->localport] = NULL; ++ } else ++ service = NULL; ++ } ++ spin_unlock(&service_spinlock); ++ ++ if (service && service->userdata_term) ++ service->userdata_term(service->base.userdata); ++ ++ kfree(service); ++} ++ ++int ++vchiq_get_client_id(VCHIQ_SERVICE_HANDLE_T handle) ++{ ++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle); ++ int id; ++ ++ id = service ? service->client_id : 0; ++ if (service) ++ unlock_service(service); ++ ++ return id; ++} ++ ++void * ++vchiq_get_service_userdata(VCHIQ_SERVICE_HANDLE_T handle) ++{ ++ VCHIQ_SERVICE_T *service = handle_to_service(handle); ++ ++ return service ? service->base.userdata : NULL; ++} ++ ++int ++vchiq_get_service_fourcc(VCHIQ_SERVICE_HANDLE_T handle) ++{ ++ VCHIQ_SERVICE_T *service = handle_to_service(handle); ++ ++ return service ? service->base.fourcc : 0; ++} ++ ++static void ++mark_service_closing_internal(VCHIQ_SERVICE_T *service, int sh_thread) ++{ ++ VCHIQ_STATE_T *state = service->state; ++ VCHIQ_SERVICE_QUOTA_T *service_quota; ++ ++ service->closing = 1; ++ ++ /* Synchronise with other threads. */ ++ mutex_lock(&state->recycle_mutex); ++ mutex_unlock(&state->recycle_mutex); ++ if (!sh_thread || (state->conn_state != VCHIQ_CONNSTATE_PAUSE_SENT)) { ++ /* If we're pausing then the slot_mutex is held until resume ++ * by the slot handler. Therefore don't try to acquire this ++ * mutex if we're the slot handler and in the pause sent state. ++ * We don't need to in this case anyway. */ ++ mutex_lock(&state->slot_mutex); ++ mutex_unlock(&state->slot_mutex); ++ } ++ ++ /* Unblock any sending thread. */ ++ service_quota = &state->service_quotas[service->localport]; ++ up(&service_quota->quota_event); ++} ++ ++static void ++mark_service_closing(VCHIQ_SERVICE_T *service) ++{ ++ mark_service_closing_internal(service, 0); ++} ++ ++static inline VCHIQ_STATUS_T ++make_service_callback(VCHIQ_SERVICE_T *service, VCHIQ_REASON_T reason, ++ VCHIQ_HEADER_T *header, void *bulk_userdata) ++{ ++ VCHIQ_STATUS_T status; ++ vchiq_log_trace(vchiq_core_log_level, "%d: callback:%d (%s, %x, %x)", ++ service->state->id, service->localport, reason_names[reason], ++ (unsigned int)header, (unsigned int)bulk_userdata); ++ status = service->base.callback(reason, header, service->handle, ++ bulk_userdata); ++ if (status == VCHIQ_ERROR) { ++ vchiq_log_warning(vchiq_core_log_level, ++ "%d: ignoring ERROR from callback to service %x", ++ service->state->id, service->handle); ++ status = VCHIQ_SUCCESS; ++ } ++ return status; ++} ++ ++inline void ++vchiq_set_conn_state(VCHIQ_STATE_T *state, VCHIQ_CONNSTATE_T newstate) ++{ ++ VCHIQ_CONNSTATE_T oldstate = state->conn_state; ++ vchiq_log_info(vchiq_core_log_level, "%d: %s->%s", state->id, ++ conn_state_names[oldstate], ++ conn_state_names[newstate]); ++ state->conn_state = newstate; ++ vchiq_platform_conn_state_changed(state, oldstate, newstate); ++} ++ ++static inline void ++remote_event_create(REMOTE_EVENT_T *event) ++{ ++ event->armed = 0; ++ /* Don't clear the 'fired' flag because it may already have been set ++ ** by the other side. */ ++ sema_init(event->event, 0); ++} ++ ++static inline void ++remote_event_destroy(REMOTE_EVENT_T *event) ++{ ++ (void)event; ++} ++ ++static inline int ++remote_event_wait(REMOTE_EVENT_T *event) ++{ ++ if (!event->fired) { ++ event->armed = 1; ++ dsb(); ++ if (!event->fired) { ++ if (down_interruptible(event->event) != 0) { ++ event->armed = 0; ++ return 0; ++ } ++ } ++ event->armed = 0; ++ wmb(); ++ } ++ ++ event->fired = 0; ++ return 1; ++} ++ ++static inline void ++remote_event_signal_local(REMOTE_EVENT_T *event) ++{ ++ event->armed = 0; ++ up(event->event); ++} ++ ++static inline void ++remote_event_poll(REMOTE_EVENT_T *event) ++{ ++ if (event->fired && event->armed) ++ remote_event_signal_local(event); ++} ++ ++void ++remote_event_pollall(VCHIQ_STATE_T *state) ++{ ++ remote_event_poll(&state->local->sync_trigger); ++ remote_event_poll(&state->local->sync_release); ++ remote_event_poll(&state->local->trigger); ++ remote_event_poll(&state->local->recycle); ++} ++ ++/* Round up message sizes so that any space at the end of a slot is always big ++** enough for a header. This relies on header size being a power of two, which ++** has been verified earlier by a static assertion. */ ++ ++static inline unsigned int ++calc_stride(unsigned int size) ++{ ++ /* Allow room for the header */ ++ size += sizeof(VCHIQ_HEADER_T); ++ ++ /* Round up */ ++ return (size + sizeof(VCHIQ_HEADER_T) - 1) & ~(sizeof(VCHIQ_HEADER_T) ++ - 1); ++} ++ ++/* Called by the slot handler thread */ ++static VCHIQ_SERVICE_T * ++get_listening_service(VCHIQ_STATE_T *state, int fourcc) ++{ ++ int i; ++ ++ WARN_ON(fourcc == VCHIQ_FOURCC_INVALID); ++ ++ for (i = 0; i < state->unused_service; i++) { ++ VCHIQ_SERVICE_T *service = state->services[i]; ++ if (service && ++ (service->public_fourcc == fourcc) && ++ ((service->srvstate == VCHIQ_SRVSTATE_LISTENING) || ++ ((service->srvstate == VCHIQ_SRVSTATE_OPEN) && ++ (service->remoteport == VCHIQ_PORT_FREE)))) { ++ lock_service(service); ++ return service; ++ } ++ } ++ ++ return NULL; ++} ++ ++/* Called by the slot handler thread */ ++static VCHIQ_SERVICE_T * ++get_connected_service(VCHIQ_STATE_T *state, unsigned int port) ++{ ++ int i; ++ for (i = 0; i < state->unused_service; i++) { ++ VCHIQ_SERVICE_T *service = state->services[i]; ++ if (service && (service->srvstate == VCHIQ_SRVSTATE_OPEN) ++ && (service->remoteport == port)) { ++ lock_service(service); ++ return service; ++ } ++ } ++ return NULL; ++} ++ ++inline void ++request_poll(VCHIQ_STATE_T *state, VCHIQ_SERVICE_T *service, int poll_type) ++{ ++ uint32_t value; ++ ++ if (service) { ++ do { ++ value = atomic_read(&service->poll_flags); ++ } while (atomic_cmpxchg(&service->poll_flags, value, ++ value | (1 << poll_type)) != value); ++ ++ do { ++ value = atomic_read(&state->poll_services[ ++ service->localport>>5]); ++ } while (atomic_cmpxchg( ++ &state->poll_services[service->localport>>5], ++ value, value | (1 << (service->localport & 0x1f))) ++ != value); ++ } ++ ++ state->poll_needed = 1; ++ wmb(); ++ ++ /* ... and ensure the slot handler runs. */ ++ remote_event_signal_local(&state->local->trigger); ++} ++ ++/* Called from queue_message, by the slot handler and application threads, ++** with slot_mutex held */ ++static VCHIQ_HEADER_T * ++reserve_space(VCHIQ_STATE_T *state, int space, int is_blocking) ++{ ++ VCHIQ_SHARED_STATE_T *local = state->local; ++ int tx_pos = state->local_tx_pos; ++ int slot_space = VCHIQ_SLOT_SIZE - (tx_pos & VCHIQ_SLOT_MASK); ++ ++ if (space > slot_space) { ++ VCHIQ_HEADER_T *header; ++ /* Fill the remaining space with padding */ ++ WARN_ON(state->tx_data == NULL); ++ header = (VCHIQ_HEADER_T *) ++ (state->tx_data + (tx_pos & VCHIQ_SLOT_MASK)); ++ header->msgid = VCHIQ_MSGID_PADDING; ++ header->size = slot_space - sizeof(VCHIQ_HEADER_T); ++ ++ tx_pos += slot_space; ++ } ++ ++ /* If necessary, get the next slot. */ ++ if ((tx_pos & VCHIQ_SLOT_MASK) == 0) { ++ int slot_index; ++ ++ /* If there is no free slot... */ ++ ++ if (down_trylock(&state->slot_available_event) != 0) { ++ /* ...wait for one. */ ++ ++ VCHIQ_STATS_INC(state, slot_stalls); ++ ++ /* But first, flush through the last slot. */ ++ state->local_tx_pos = tx_pos; ++ local->tx_pos = tx_pos; ++ remote_event_signal(&state->remote->trigger); ++ ++ if (!is_blocking || ++ (down_interruptible( ++ &state->slot_available_event) != 0)) ++ return NULL; /* No space available */ ++ } ++ ++ BUG_ON(tx_pos == ++ (state->slot_queue_available * VCHIQ_SLOT_SIZE)); ++ ++ slot_index = local->slot_queue[ ++ SLOT_QUEUE_INDEX_FROM_POS(tx_pos) & ++ VCHIQ_SLOT_QUEUE_MASK]; ++ state->tx_data = ++ (char *)SLOT_DATA_FROM_INDEX(state, slot_index); ++ } ++ ++ state->local_tx_pos = tx_pos + space; ++ ++ return (VCHIQ_HEADER_T *)(state->tx_data + (tx_pos & VCHIQ_SLOT_MASK)); ++} ++ ++/* Called by the recycle thread. */ ++static void ++process_free_queue(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_SHARED_STATE_T *local = state->local; ++ BITSET_T service_found[BITSET_SIZE(VCHIQ_MAX_SERVICES)]; ++ int slot_queue_available; ++ ++ /* Use a read memory barrier to ensure that any state that may have ++ ** been modified by another thread is not masked by stale prefetched ++ ** values. */ ++ rmb(); ++ ++ /* Find slots which have been freed by the other side, and return them ++ ** to the available queue. */ ++ slot_queue_available = state->slot_queue_available; ++ ++ while (slot_queue_available != local->slot_queue_recycle) { ++ unsigned int pos; ++ int slot_index = local->slot_queue[slot_queue_available++ & ++ VCHIQ_SLOT_QUEUE_MASK]; ++ char *data = (char *)SLOT_DATA_FROM_INDEX(state, slot_index); ++ int data_found = 0; ++ ++ vchiq_log_trace(vchiq_core_log_level, "%d: pfq %d=%x %x %x", ++ state->id, slot_index, (unsigned int)data, ++ local->slot_queue_recycle, slot_queue_available); ++ ++ /* Initialise the bitmask for services which have used this ++ ** slot */ ++ BITSET_ZERO(service_found); ++ ++ pos = 0; ++ ++ while (pos < VCHIQ_SLOT_SIZE) { ++ VCHIQ_HEADER_T *header = ++ (VCHIQ_HEADER_T *)(data + pos); ++ int msgid = header->msgid; ++ if (VCHIQ_MSG_TYPE(msgid) == VCHIQ_MSG_DATA) { ++ int port = VCHIQ_MSG_SRCPORT(msgid); ++ VCHIQ_SERVICE_QUOTA_T *service_quota = ++ &state->service_quotas[port]; ++ int count; ++ spin_lock("a_spinlock); ++ count = service_quota->message_use_count; ++ if (count > 0) ++ service_quota->message_use_count = ++ count - 1; ++ spin_unlock("a_spinlock); ++ ++ if (count == service_quota->message_quota) ++ /* Signal the service that it ++ ** has dropped below its quota ++ */ ++ up(&service_quota->quota_event); ++ else if (count == 0) { ++ vchiq_log_error(vchiq_core_log_level, ++ "service %d " ++ "message_use_count=%d " ++ "(header %x, msgid %x, " ++ "header->msgid %x, " ++ "header->size %x)", ++ port, ++ service_quota-> ++ message_use_count, ++ (unsigned int)header, msgid, ++ header->msgid, ++ header->size); ++ WARN(1, "invalid message use count\n"); ++ } ++ if (!BITSET_IS_SET(service_found, port)) { ++ /* Set the found bit for this service */ ++ BITSET_SET(service_found, port); ++ ++ spin_lock("a_spinlock); ++ count = service_quota->slot_use_count; ++ if (count > 0) ++ service_quota->slot_use_count = ++ count - 1; ++ spin_unlock("a_spinlock); ++ ++ if (count > 0) { ++ /* Signal the service in case ++ ** it has dropped below its ++ ** quota */ ++ up(&service_quota->quota_event); ++ vchiq_log_trace( ++ vchiq_core_log_level, ++ "%d: pfq:%d %x@%x - " ++ "slot_use->%d", ++ state->id, port, ++ header->size, ++ (unsigned int)header, ++ count - 1); ++ } else { ++ vchiq_log_error( ++ vchiq_core_log_level, ++ "service %d " ++ "slot_use_count" ++ "=%d (header %x" ++ ", msgid %x, " ++ "header->msgid" ++ " %x, header->" ++ "size %x)", ++ port, count, ++ (unsigned int)header, ++ msgid, ++ header->msgid, ++ header->size); ++ WARN(1, "bad slot use count\n"); ++ } ++ } ++ ++ data_found = 1; ++ } ++ ++ pos += calc_stride(header->size); ++ if (pos > VCHIQ_SLOT_SIZE) { ++ vchiq_log_error(vchiq_core_log_level, ++ "pfq - pos %x: header %x, msgid %x, " ++ "header->msgid %x, header->size %x", ++ pos, (unsigned int)header, msgid, ++ header->msgid, header->size); ++ WARN(1, "invalid slot position\n"); ++ } ++ } ++ ++ if (data_found) { ++ int count; ++ spin_lock("a_spinlock); ++ count = state->data_use_count; ++ if (count > 0) ++ state->data_use_count = ++ count - 1; ++ spin_unlock("a_spinlock); ++ if (count == state->data_quota) ++ up(&state->data_quota_event); ++ } ++ ++ state->slot_queue_available = slot_queue_available; ++ up(&state->slot_available_event); ++ } ++} ++ ++/* Called by the slot handler and application threads */ ++static VCHIQ_STATUS_T ++queue_message(VCHIQ_STATE_T *state, VCHIQ_SERVICE_T *service, ++ int msgid, const VCHIQ_ELEMENT_T *elements, ++ int count, int size, int flags) ++{ ++ VCHIQ_SHARED_STATE_T *local; ++ VCHIQ_SERVICE_QUOTA_T *service_quota = NULL; ++ VCHIQ_HEADER_T *header; ++ int type = VCHIQ_MSG_TYPE(msgid); ++ ++ unsigned int stride; ++ ++ local = state->local; ++ ++ stride = calc_stride(size); ++ ++ WARN_ON(!(stride <= VCHIQ_SLOT_SIZE)); ++ ++ if (!(flags & QMFLAGS_NO_MUTEX_LOCK) && ++ (mutex_lock_interruptible(&state->slot_mutex) != 0)) ++ return VCHIQ_RETRY; ++ ++ if (type == VCHIQ_MSG_DATA) { ++ int tx_end_index; ++ ++ BUG_ON(!service); ++ BUG_ON((flags & (QMFLAGS_NO_MUTEX_LOCK | ++ QMFLAGS_NO_MUTEX_UNLOCK)) != 0); ++ ++ if (service->closing) { ++ /* The service has been closed */ ++ mutex_unlock(&state->slot_mutex); ++ return VCHIQ_ERROR; ++ } ++ ++ service_quota = &state->service_quotas[service->localport]; ++ ++ spin_lock("a_spinlock); ++ ++ /* Ensure this service doesn't use more than its quota of ++ ** messages or slots */ ++ tx_end_index = SLOT_QUEUE_INDEX_FROM_POS( ++ state->local_tx_pos + stride - 1); ++ ++ /* Ensure data messages don't use more than their quota of ++ ** slots */ ++ while ((tx_end_index != state->previous_data_index) && ++ (state->data_use_count == state->data_quota)) { ++ VCHIQ_STATS_INC(state, data_stalls); ++ spin_unlock("a_spinlock); ++ mutex_unlock(&state->slot_mutex); ++ ++ if (down_interruptible(&state->data_quota_event) ++ != 0) ++ return VCHIQ_RETRY; ++ ++ mutex_lock(&state->slot_mutex); ++ spin_lock("a_spinlock); ++ tx_end_index = SLOT_QUEUE_INDEX_FROM_POS( ++ state->local_tx_pos + stride - 1); ++ if ((tx_end_index == state->previous_data_index) || ++ (state->data_use_count < state->data_quota)) { ++ /* Pass the signal on to other waiters */ ++ up(&state->data_quota_event); ++ break; ++ } ++ } ++ ++ while ((service_quota->message_use_count == ++ service_quota->message_quota) || ++ ((tx_end_index != service_quota->previous_tx_index) && ++ (service_quota->slot_use_count == ++ service_quota->slot_quota))) { ++ spin_unlock("a_spinlock); ++ vchiq_log_trace(vchiq_core_log_level, ++ "%d: qm:%d %s,%x - quota stall " ++ "(msg %d, slot %d)", ++ state->id, service->localport, ++ msg_type_str(type), size, ++ service_quota->message_use_count, ++ service_quota->slot_use_count); ++ VCHIQ_SERVICE_STATS_INC(service, quota_stalls); ++ mutex_unlock(&state->slot_mutex); ++ if (down_interruptible(&service_quota->quota_event) ++ != 0) ++ return VCHIQ_RETRY; ++ if (service->closing) ++ return VCHIQ_ERROR; ++ if (mutex_lock_interruptible(&state->slot_mutex) != 0) ++ return VCHIQ_RETRY; ++ if (service->srvstate != VCHIQ_SRVSTATE_OPEN) { ++ /* The service has been closed */ ++ mutex_unlock(&state->slot_mutex); ++ return VCHIQ_ERROR; ++ } ++ spin_lock("a_spinlock); ++ tx_end_index = SLOT_QUEUE_INDEX_FROM_POS( ++ state->local_tx_pos + stride - 1); ++ } ++ ++ spin_unlock("a_spinlock); ++ } ++ ++ header = reserve_space(state, stride, flags & QMFLAGS_IS_BLOCKING); ++ ++ if (!header) { ++ if (service) ++ VCHIQ_SERVICE_STATS_INC(service, slot_stalls); ++ /* In the event of a failure, return the mutex to the ++ state it was in */ ++ if (!(flags & QMFLAGS_NO_MUTEX_LOCK)) ++ mutex_unlock(&state->slot_mutex); ++ return VCHIQ_RETRY; ++ } ++ ++ if (type == VCHIQ_MSG_DATA) { ++ int i, pos; ++ int tx_end_index; ++ int slot_use_count; ++ ++ vchiq_log_info(vchiq_core_log_level, ++ "%d: qm %s@%x,%x (%d->%d)", ++ state->id, ++ msg_type_str(VCHIQ_MSG_TYPE(msgid)), ++ (unsigned int)header, size, ++ VCHIQ_MSG_SRCPORT(msgid), ++ VCHIQ_MSG_DSTPORT(msgid)); ++ ++ BUG_ON(!service); ++ BUG_ON((flags & (QMFLAGS_NO_MUTEX_LOCK | ++ QMFLAGS_NO_MUTEX_UNLOCK)) != 0); ++ ++ for (i = 0, pos = 0; i < (unsigned int)count; ++ pos += elements[i++].size) ++ if (elements[i].size) { ++ if (vchiq_copy_from_user ++ (header->data + pos, elements[i].data, ++ (size_t) elements[i].size) != ++ VCHIQ_SUCCESS) { ++ mutex_unlock(&state->slot_mutex); ++ VCHIQ_SERVICE_STATS_INC(service, ++ error_count); ++ return VCHIQ_ERROR; ++ } ++ if (i == 0) { ++ if (SRVTRACE_ENABLED(service, ++ VCHIQ_LOG_INFO)) ++ vchiq_log_dump_mem("Sent", 0, ++ header->data + pos, ++ min(64u, ++ elements[0].size)); ++ } ++ } ++ ++ spin_lock("a_spinlock); ++ service_quota->message_use_count++; ++ ++ tx_end_index = ++ SLOT_QUEUE_INDEX_FROM_POS(state->local_tx_pos - 1); ++ ++ /* If this transmission can't fit in the last slot used by any ++ ** service, the data_use_count must be increased. */ ++ if (tx_end_index != state->previous_data_index) { ++ state->previous_data_index = tx_end_index; ++ state->data_use_count++; ++ } ++ ++ /* If this isn't the same slot last used by this service, ++ ** the service's slot_use_count must be increased. */ ++ if (tx_end_index != service_quota->previous_tx_index) { ++ service_quota->previous_tx_index = tx_end_index; ++ slot_use_count = ++service_quota->slot_use_count; ++ } else { ++ slot_use_count = 0; ++ } ++ ++ spin_unlock("a_spinlock); ++ ++ if (slot_use_count) ++ vchiq_log_trace(vchiq_core_log_level, ++ "%d: qm:%d %s,%x - slot_use->%d (hdr %p)", ++ state->id, service->localport, ++ msg_type_str(VCHIQ_MSG_TYPE(msgid)), size, ++ slot_use_count, header); ++ ++ VCHIQ_SERVICE_STATS_INC(service, ctrl_tx_count); ++ VCHIQ_SERVICE_STATS_ADD(service, ctrl_tx_bytes, size); ++ } else { ++ vchiq_log_info(vchiq_core_log_level, ++ "%d: qm %s@%x,%x (%d->%d)", state->id, ++ msg_type_str(VCHIQ_MSG_TYPE(msgid)), ++ (unsigned int)header, size, ++ VCHIQ_MSG_SRCPORT(msgid), ++ VCHIQ_MSG_DSTPORT(msgid)); ++ if (size != 0) { ++ WARN_ON(!((count == 1) && (size == elements[0].size))); ++ memcpy(header->data, elements[0].data, ++ elements[0].size); ++ } ++ VCHIQ_STATS_INC(state, ctrl_tx_count); ++ } ++ ++ header->msgid = msgid; ++ header->size = size; ++ ++ { ++ int svc_fourcc; ++ ++ svc_fourcc = service ++ ? service->base.fourcc ++ : VCHIQ_MAKE_FOURCC('?', '?', '?', '?'); ++ ++ vchiq_log_info(SRVTRACE_LEVEL(service), ++ "Sent Msg %s(%u) to %c%c%c%c s:%u d:%d len:%d", ++ msg_type_str(VCHIQ_MSG_TYPE(msgid)), ++ VCHIQ_MSG_TYPE(msgid), ++ VCHIQ_FOURCC_AS_4CHARS(svc_fourcc), ++ VCHIQ_MSG_SRCPORT(msgid), ++ VCHIQ_MSG_DSTPORT(msgid), ++ size); ++ } ++ ++ /* Make sure the new header is visible to the peer. */ ++ wmb(); ++ ++ /* Make the new tx_pos visible to the peer. */ ++ local->tx_pos = state->local_tx_pos; ++ wmb(); ++ ++ if (service && (type == VCHIQ_MSG_CLOSE)) ++ vchiq_set_service_state(service, VCHIQ_SRVSTATE_CLOSESENT); ++ ++ if (!(flags & QMFLAGS_NO_MUTEX_UNLOCK)) ++ mutex_unlock(&state->slot_mutex); ++ ++ remote_event_signal(&state->remote->trigger); ++ ++ return VCHIQ_SUCCESS; ++} ++ ++/* Called by the slot handler and application threads */ ++static VCHIQ_STATUS_T ++queue_message_sync(VCHIQ_STATE_T *state, VCHIQ_SERVICE_T *service, ++ int msgid, const VCHIQ_ELEMENT_T *elements, ++ int count, int size, int is_blocking) ++{ ++ VCHIQ_SHARED_STATE_T *local; ++ VCHIQ_HEADER_T *header; ++ ++ local = state->local; ++ ++ if ((VCHIQ_MSG_TYPE(msgid) != VCHIQ_MSG_RESUME) && ++ (mutex_lock_interruptible(&state->sync_mutex) != 0)) ++ return VCHIQ_RETRY; ++ ++ remote_event_wait(&local->sync_release); ++ ++ rmb(); ++ ++ header = (VCHIQ_HEADER_T *)SLOT_DATA_FROM_INDEX(state, ++ local->slot_sync); ++ ++ { ++ int oldmsgid = header->msgid; ++ if (oldmsgid != VCHIQ_MSGID_PADDING) ++ vchiq_log_error(vchiq_core_log_level, ++ "%d: qms - msgid %x, not PADDING", ++ state->id, oldmsgid); ++ } ++ ++ if (service) { ++ int i, pos; ++ ++ vchiq_log_info(vchiq_sync_log_level, ++ "%d: qms %s@%x,%x (%d->%d)", state->id, ++ msg_type_str(VCHIQ_MSG_TYPE(msgid)), ++ (unsigned int)header, size, ++ VCHIQ_MSG_SRCPORT(msgid), ++ VCHIQ_MSG_DSTPORT(msgid)); ++ ++ for (i = 0, pos = 0; i < (unsigned int)count; ++ pos += elements[i++].size) ++ if (elements[i].size) { ++ if (vchiq_copy_from_user ++ (header->data + pos, elements[i].data, ++ (size_t) elements[i].size) != ++ VCHIQ_SUCCESS) { ++ mutex_unlock(&state->sync_mutex); ++ VCHIQ_SERVICE_STATS_INC(service, ++ error_count); ++ return VCHIQ_ERROR; ++ } ++ if (i == 0) { ++ if (vchiq_sync_log_level >= ++ VCHIQ_LOG_TRACE) ++ vchiq_log_dump_mem("Sent Sync", ++ 0, header->data + pos, ++ min(64u, ++ elements[0].size)); ++ } ++ } ++ ++ VCHIQ_SERVICE_STATS_INC(service, ctrl_tx_count); ++ VCHIQ_SERVICE_STATS_ADD(service, ctrl_tx_bytes, size); ++ } else { ++ vchiq_log_info(vchiq_sync_log_level, ++ "%d: qms %s@%x,%x (%d->%d)", state->id, ++ msg_type_str(VCHIQ_MSG_TYPE(msgid)), ++ (unsigned int)header, size, ++ VCHIQ_MSG_SRCPORT(msgid), ++ VCHIQ_MSG_DSTPORT(msgid)); ++ if (size != 0) { ++ WARN_ON(!((count == 1) && (size == elements[0].size))); ++ memcpy(header->data, elements[0].data, ++ elements[0].size); ++ } ++ VCHIQ_STATS_INC(state, ctrl_tx_count); ++ } ++ ++ header->size = size; ++ header->msgid = msgid; ++ ++ if (vchiq_sync_log_level >= VCHIQ_LOG_TRACE) { ++ int svc_fourcc; ++ ++ svc_fourcc = service ++ ? service->base.fourcc ++ : VCHIQ_MAKE_FOURCC('?', '?', '?', '?'); ++ ++ vchiq_log_trace(vchiq_sync_log_level, ++ "Sent Sync Msg %s(%u) to %c%c%c%c s:%u d:%d len:%d", ++ msg_type_str(VCHIQ_MSG_TYPE(msgid)), ++ VCHIQ_MSG_TYPE(msgid), ++ VCHIQ_FOURCC_AS_4CHARS(svc_fourcc), ++ VCHIQ_MSG_SRCPORT(msgid), ++ VCHIQ_MSG_DSTPORT(msgid), ++ size); ++ } ++ ++ /* Make sure the new header is visible to the peer. */ ++ wmb(); ++ ++ remote_event_signal(&state->remote->sync_trigger); ++ ++ if (VCHIQ_MSG_TYPE(msgid) != VCHIQ_MSG_PAUSE) ++ mutex_unlock(&state->sync_mutex); ++ ++ return VCHIQ_SUCCESS; ++} ++ ++static inline void ++claim_slot(VCHIQ_SLOT_INFO_T *slot) ++{ ++ slot->use_count++; ++} ++ ++static void ++release_slot(VCHIQ_STATE_T *state, VCHIQ_SLOT_INFO_T *slot_info, ++ VCHIQ_HEADER_T *header, VCHIQ_SERVICE_T *service) ++{ ++ int release_count; ++ ++ mutex_lock(&state->recycle_mutex); ++ ++ if (header) { ++ int msgid = header->msgid; ++ if (((msgid & VCHIQ_MSGID_CLAIMED) == 0) || ++ (service && service->closing)) { ++ mutex_unlock(&state->recycle_mutex); ++ return; ++ } ++ ++ /* Rewrite the message header to prevent a double ++ ** release */ ++ header->msgid = msgid & ~VCHIQ_MSGID_CLAIMED; ++ } ++ ++ release_count = slot_info->release_count; ++ slot_info->release_count = ++release_count; ++ ++ if (release_count == slot_info->use_count) { ++ int slot_queue_recycle; ++ /* Add to the freed queue */ ++ ++ /* A read barrier is necessary here to prevent speculative ++ ** fetches of remote->slot_queue_recycle from overtaking the ++ ** mutex. */ ++ rmb(); ++ ++ slot_queue_recycle = state->remote->slot_queue_recycle; ++ state->remote->slot_queue[slot_queue_recycle & ++ VCHIQ_SLOT_QUEUE_MASK] = ++ SLOT_INDEX_FROM_INFO(state, slot_info); ++ state->remote->slot_queue_recycle = slot_queue_recycle + 1; ++ vchiq_log_info(vchiq_core_log_level, ++ "%d: release_slot %d - recycle->%x", ++ state->id, SLOT_INDEX_FROM_INFO(state, slot_info), ++ state->remote->slot_queue_recycle); ++ ++ /* A write barrier is necessary, but remote_event_signal ++ ** contains one. */ ++ remote_event_signal(&state->remote->recycle); ++ } ++ ++ mutex_unlock(&state->recycle_mutex); ++} ++ ++/* Called by the slot handler - don't hold the bulk mutex */ ++static VCHIQ_STATUS_T ++notify_bulks(VCHIQ_SERVICE_T *service, VCHIQ_BULK_QUEUE_T *queue, ++ int retry_poll) ++{ ++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS; ++ ++ vchiq_log_trace(vchiq_core_log_level, ++ "%d: nb:%d %cx - p=%x rn=%x r=%x", ++ service->state->id, service->localport, ++ (queue == &service->bulk_tx) ? 't' : 'r', ++ queue->process, queue->remote_notify, queue->remove); ++ ++ if (service->state->is_master) { ++ while (queue->remote_notify != queue->process) { ++ VCHIQ_BULK_T *bulk = ++ &queue->bulks[BULK_INDEX(queue->remote_notify)]; ++ int msgtype = (bulk->dir == VCHIQ_BULK_TRANSMIT) ? ++ VCHIQ_MSG_BULK_RX_DONE : VCHIQ_MSG_BULK_TX_DONE; ++ int msgid = VCHIQ_MAKE_MSG(msgtype, service->localport, ++ service->remoteport); ++ VCHIQ_ELEMENT_T element = { &bulk->actual, 4 }; ++ /* Only reply to non-dummy bulk requests */ ++ if (bulk->remote_data) { ++ status = queue_message(service->state, NULL, ++ msgid, &element, 1, 4, 0); ++ if (status != VCHIQ_SUCCESS) ++ break; ++ } ++ queue->remote_notify++; ++ } ++ } else { ++ queue->remote_notify = queue->process; ++ } ++ ++ if (status == VCHIQ_SUCCESS) { ++ while (queue->remove != queue->remote_notify) { ++ VCHIQ_BULK_T *bulk = ++ &queue->bulks[BULK_INDEX(queue->remove)]; ++ ++ /* Only generate callbacks for non-dummy bulk ++ ** requests, and non-terminated services */ ++ if (bulk->data && service->instance) { ++ if (bulk->actual != VCHIQ_BULK_ACTUAL_ABORTED) { ++ if (bulk->dir == VCHIQ_BULK_TRANSMIT) { ++ VCHIQ_SERVICE_STATS_INC(service, ++ bulk_tx_count); ++ VCHIQ_SERVICE_STATS_ADD(service, ++ bulk_tx_bytes, ++ bulk->actual); ++ } else { ++ VCHIQ_SERVICE_STATS_INC(service, ++ bulk_rx_count); ++ VCHIQ_SERVICE_STATS_ADD(service, ++ bulk_rx_bytes, ++ bulk->actual); ++ } ++ } else { ++ VCHIQ_SERVICE_STATS_INC(service, ++ bulk_aborted_count); ++ } ++ if (bulk->mode == VCHIQ_BULK_MODE_BLOCKING) { ++ struct bulk_waiter *waiter; ++ spin_lock(&bulk_waiter_spinlock); ++ waiter = bulk->userdata; ++ if (waiter) { ++ waiter->actual = bulk->actual; ++ up(&waiter->event); ++ } ++ spin_unlock(&bulk_waiter_spinlock); ++ } else if (bulk->mode == ++ VCHIQ_BULK_MODE_CALLBACK) { ++ VCHIQ_REASON_T reason = (bulk->dir == ++ VCHIQ_BULK_TRANSMIT) ? ++ ((bulk->actual == ++ VCHIQ_BULK_ACTUAL_ABORTED) ? ++ VCHIQ_BULK_TRANSMIT_ABORTED : ++ VCHIQ_BULK_TRANSMIT_DONE) : ++ ((bulk->actual == ++ VCHIQ_BULK_ACTUAL_ABORTED) ? ++ VCHIQ_BULK_RECEIVE_ABORTED : ++ VCHIQ_BULK_RECEIVE_DONE); ++ status = make_service_callback(service, ++ reason, NULL, bulk->userdata); ++ if (status == VCHIQ_RETRY) ++ break; ++ } ++ } ++ ++ queue->remove++; ++ up(&service->bulk_remove_event); ++ } ++ if (!retry_poll) ++ status = VCHIQ_SUCCESS; ++ } ++ ++ if (status == VCHIQ_RETRY) ++ request_poll(service->state, service, ++ (queue == &service->bulk_tx) ? ++ VCHIQ_POLL_TXNOTIFY : VCHIQ_POLL_RXNOTIFY); ++ ++ return status; ++} ++ ++/* Called by the slot handler thread */ ++static void ++poll_services(VCHIQ_STATE_T *state) ++{ ++ int group, i; ++ ++ for (group = 0; group < BITSET_SIZE(state->unused_service); group++) { ++ uint32_t flags; ++ flags = atomic_xchg(&state->poll_services[group], 0); ++ for (i = 0; flags; i++) { ++ if (flags & (1 << i)) { ++ VCHIQ_SERVICE_T *service = ++ find_service_by_port(state, ++ (group<<5) + i); ++ uint32_t service_flags; ++ flags &= ~(1 << i); ++ if (!service) ++ continue; ++ service_flags = ++ atomic_xchg(&service->poll_flags, 0); ++ if (service_flags & ++ (1 << VCHIQ_POLL_REMOVE)) { ++ vchiq_log_info(vchiq_core_log_level, ++ "%d: ps - remove %d<->%d", ++ state->id, service->localport, ++ service->remoteport); ++ ++ /* Make it look like a client, because ++ it must be removed and not left in ++ the LISTENING state. */ ++ service->public_fourcc = ++ VCHIQ_FOURCC_INVALID; ++ ++ if (vchiq_close_service_internal( ++ service, 0/*!close_recvd*/) != ++ VCHIQ_SUCCESS) ++ request_poll(state, service, ++ VCHIQ_POLL_REMOVE); ++ } else if (service_flags & ++ (1 << VCHIQ_POLL_TERMINATE)) { ++ vchiq_log_info(vchiq_core_log_level, ++ "%d: ps - terminate %d<->%d", ++ state->id, service->localport, ++ service->remoteport); ++ if (vchiq_close_service_internal( ++ service, 0/*!close_recvd*/) != ++ VCHIQ_SUCCESS) ++ request_poll(state, service, ++ VCHIQ_POLL_TERMINATE); ++ } ++ if (service_flags & (1 << VCHIQ_POLL_TXNOTIFY)) ++ notify_bulks(service, ++ &service->bulk_tx, ++ 1/*retry_poll*/); ++ if (service_flags & (1 << VCHIQ_POLL_RXNOTIFY)) ++ notify_bulks(service, ++ &service->bulk_rx, ++ 1/*retry_poll*/); ++ unlock_service(service); ++ } ++ } ++ } ++} ++ ++/* Called by the slot handler or application threads, holding the bulk mutex. */ ++static int ++resolve_bulks(VCHIQ_SERVICE_T *service, VCHIQ_BULK_QUEUE_T *queue) ++{ ++ VCHIQ_STATE_T *state = service->state; ++ int resolved = 0; ++ int rc; ++ ++ while ((queue->process != queue->local_insert) && ++ (queue->process != queue->remote_insert)) { ++ VCHIQ_BULK_T *bulk = &queue->bulks[BULK_INDEX(queue->process)]; ++ ++ vchiq_log_trace(vchiq_core_log_level, ++ "%d: rb:%d %cx - li=%x ri=%x p=%x", ++ state->id, service->localport, ++ (queue == &service->bulk_tx) ? 't' : 'r', ++ queue->local_insert, queue->remote_insert, ++ queue->process); ++ ++ WARN_ON(!((int)(queue->local_insert - queue->process) > 0)); ++ WARN_ON(!((int)(queue->remote_insert - queue->process) > 0)); ++ ++ rc = mutex_lock_interruptible(&state->bulk_transfer_mutex); ++ if (rc != 0) ++ break; ++ ++ vchiq_transfer_bulk(bulk); ++ mutex_unlock(&state->bulk_transfer_mutex); ++ ++ if (SRVTRACE_ENABLED(service, VCHIQ_LOG_INFO)) { ++ const char *header = (queue == &service->bulk_tx) ? ++ "Send Bulk to" : "Recv Bulk from"; ++ if (bulk->actual != VCHIQ_BULK_ACTUAL_ABORTED) ++ vchiq_log_info(SRVTRACE_LEVEL(service), ++ "%s %c%c%c%c d:%d len:%d %x<->%x", ++ header, ++ VCHIQ_FOURCC_AS_4CHARS( ++ service->base.fourcc), ++ service->remoteport, ++ bulk->size, ++ (unsigned int)bulk->data, ++ (unsigned int)bulk->remote_data); ++ else ++ vchiq_log_info(SRVTRACE_LEVEL(service), ++ "%s %c%c%c%c d:%d ABORTED - tx len:%d," ++ " rx len:%d %x<->%x", ++ header, ++ VCHIQ_FOURCC_AS_4CHARS( ++ service->base.fourcc), ++ service->remoteport, ++ bulk->size, ++ bulk->remote_size, ++ (unsigned int)bulk->data, ++ (unsigned int)bulk->remote_data); ++ } ++ ++ vchiq_complete_bulk(bulk); ++ queue->process++; ++ resolved++; ++ } ++ return resolved; ++} ++ ++/* Called with the bulk_mutex held */ ++static void ++abort_outstanding_bulks(VCHIQ_SERVICE_T *service, VCHIQ_BULK_QUEUE_T *queue) ++{ ++ int is_tx = (queue == &service->bulk_tx); ++ vchiq_log_trace(vchiq_core_log_level, ++ "%d: aob:%d %cx - li=%x ri=%x p=%x", ++ service->state->id, service->localport, is_tx ? 't' : 'r', ++ queue->local_insert, queue->remote_insert, queue->process); ++ ++ WARN_ON(!((int)(queue->local_insert - queue->process) >= 0)); ++ WARN_ON(!((int)(queue->remote_insert - queue->process) >= 0)); ++ ++ while ((queue->process != queue->local_insert) || ++ (queue->process != queue->remote_insert)) { ++ VCHIQ_BULK_T *bulk = &queue->bulks[BULK_INDEX(queue->process)]; ++ ++ if (queue->process == queue->remote_insert) { ++ /* fabricate a matching dummy bulk */ ++ bulk->remote_data = NULL; ++ bulk->remote_size = 0; ++ queue->remote_insert++; ++ } ++ ++ if (queue->process != queue->local_insert) { ++ vchiq_complete_bulk(bulk); ++ ++ vchiq_log_info(SRVTRACE_LEVEL(service), ++ "%s %c%c%c%c d:%d ABORTED - tx len:%d, " ++ "rx len:%d", ++ is_tx ? "Send Bulk to" : "Recv Bulk from", ++ VCHIQ_FOURCC_AS_4CHARS(service->base.fourcc), ++ service->remoteport, ++ bulk->size, ++ bulk->remote_size); ++ } else { ++ /* fabricate a matching dummy bulk */ ++ bulk->data = NULL; ++ bulk->size = 0; ++ bulk->actual = VCHIQ_BULK_ACTUAL_ABORTED; ++ bulk->dir = is_tx ? VCHIQ_BULK_TRANSMIT : ++ VCHIQ_BULK_RECEIVE; ++ queue->local_insert++; ++ } ++ ++ queue->process++; ++ } ++} ++ ++/* Called from the slot handler thread */ ++static void ++pause_bulks(VCHIQ_STATE_T *state) ++{ ++ if (unlikely(atomic_inc_return(&pause_bulks_count) != 1)) { ++ WARN_ON_ONCE(1); ++ atomic_set(&pause_bulks_count, 1); ++ return; ++ } ++ ++ /* Block bulk transfers from all services */ ++ mutex_lock(&state->bulk_transfer_mutex); ++} ++ ++/* Called from the slot handler thread */ ++static void ++resume_bulks(VCHIQ_STATE_T *state) ++{ ++ int i; ++ if (unlikely(atomic_dec_return(&pause_bulks_count) != 0)) { ++ WARN_ON_ONCE(1); ++ atomic_set(&pause_bulks_count, 0); ++ return; ++ } ++ ++ /* Allow bulk transfers from all services */ ++ mutex_unlock(&state->bulk_transfer_mutex); ++ ++ if (state->deferred_bulks == 0) ++ return; ++ ++ /* Deal with any bulks which had to be deferred due to being in ++ * paused state. Don't try to match up to number of deferred bulks ++ * in case we've had something come and close the service in the ++ * interim - just process all bulk queues for all services */ ++ vchiq_log_info(vchiq_core_log_level, "%s: processing %d deferred bulks", ++ __func__, state->deferred_bulks); ++ ++ for (i = 0; i < state->unused_service; i++) { ++ VCHIQ_SERVICE_T *service = state->services[i]; ++ int resolved_rx = 0; ++ int resolved_tx = 0; ++ if (!service || (service->srvstate != VCHIQ_SRVSTATE_OPEN)) ++ continue; ++ ++ mutex_lock(&service->bulk_mutex); ++ resolved_rx = resolve_bulks(service, &service->bulk_rx); ++ resolved_tx = resolve_bulks(service, &service->bulk_tx); ++ mutex_unlock(&service->bulk_mutex); ++ if (resolved_rx) ++ notify_bulks(service, &service->bulk_rx, 1); ++ if (resolved_tx) ++ notify_bulks(service, &service->bulk_tx, 1); ++ } ++ state->deferred_bulks = 0; ++} ++ ++static int ++parse_open(VCHIQ_STATE_T *state, VCHIQ_HEADER_T *header) ++{ ++ VCHIQ_SERVICE_T *service = NULL; ++ int msgid, size; ++ int type; ++ unsigned int localport, remoteport; ++ ++ msgid = header->msgid; ++ size = header->size; ++ type = VCHIQ_MSG_TYPE(msgid); ++ localport = VCHIQ_MSG_DSTPORT(msgid); ++ remoteport = VCHIQ_MSG_SRCPORT(msgid); ++ if (size >= sizeof(struct vchiq_open_payload)) { ++ const struct vchiq_open_payload *payload = ++ (struct vchiq_open_payload *)header->data; ++ unsigned int fourcc; ++ ++ fourcc = payload->fourcc; ++ vchiq_log_info(vchiq_core_log_level, ++ "%d: prs OPEN@%x (%d->'%c%c%c%c')", ++ state->id, (unsigned int)header, ++ localport, ++ VCHIQ_FOURCC_AS_4CHARS(fourcc)); ++ ++ service = get_listening_service(state, fourcc); ++ ++ if (service) { ++ /* A matching service exists */ ++ short version = payload->version; ++ short version_min = payload->version_min; ++ if ((service->version < version_min) || ++ (version < service->version_min)) { ++ /* Version mismatch */ ++ vchiq_loud_error_header(); ++ vchiq_loud_error("%d: service %d (%c%c%c%c) " ++ "version mismatch - local (%d, min %d)" ++ " vs. remote (%d, min %d)", ++ state->id, service->localport, ++ VCHIQ_FOURCC_AS_4CHARS(fourcc), ++ service->version, service->version_min, ++ version, version_min); ++ vchiq_loud_error_footer(); ++ unlock_service(service); ++ service = NULL; ++ goto fail_open; ++ } ++ service->peer_version = version; ++ ++ if (service->srvstate == VCHIQ_SRVSTATE_LISTENING) { ++ struct vchiq_openack_payload ack_payload = { ++ service->version ++ }; ++ VCHIQ_ELEMENT_T body = { ++ &ack_payload, ++ sizeof(ack_payload) ++ }; ++ ++ if (state->version_common < ++ VCHIQ_VERSION_SYNCHRONOUS_MODE) ++ service->sync = 0; ++ ++ /* Acknowledge the OPEN */ ++ if (service->sync && ++ (state->version_common >= ++ VCHIQ_VERSION_SYNCHRONOUS_MODE)) { ++ if (queue_message_sync(state, NULL, ++ VCHIQ_MAKE_MSG( ++ VCHIQ_MSG_OPENACK, ++ service->localport, ++ remoteport), ++ &body, 1, sizeof(ack_payload), ++ 0) == VCHIQ_RETRY) ++ goto bail_not_ready; ++ } else { ++ if (queue_message(state, NULL, ++ VCHIQ_MAKE_MSG( ++ VCHIQ_MSG_OPENACK, ++ service->localport, ++ remoteport), ++ &body, 1, sizeof(ack_payload), ++ 0) == VCHIQ_RETRY) ++ goto bail_not_ready; ++ } ++ ++ /* The service is now open */ ++ vchiq_set_service_state(service, ++ service->sync ? VCHIQ_SRVSTATE_OPENSYNC ++ : VCHIQ_SRVSTATE_OPEN); ++ } ++ ++ service->remoteport = remoteport; ++ service->client_id = ((int *)header->data)[1]; ++ if (make_service_callback(service, VCHIQ_SERVICE_OPENED, ++ NULL, NULL) == VCHIQ_RETRY) { ++ /* Bail out if not ready */ ++ service->remoteport = VCHIQ_PORT_FREE; ++ goto bail_not_ready; ++ } ++ ++ /* Success - the message has been dealt with */ ++ unlock_service(service); ++ return 1; ++ } ++ } ++ ++fail_open: ++ /* No available service, or an invalid request - send a CLOSE */ ++ if (queue_message(state, NULL, ++ VCHIQ_MAKE_MSG(VCHIQ_MSG_CLOSE, 0, VCHIQ_MSG_SRCPORT(msgid)), ++ NULL, 0, 0, 0) == VCHIQ_RETRY) ++ goto bail_not_ready; ++ ++ return 1; ++ ++bail_not_ready: ++ if (service) ++ unlock_service(service); ++ ++ return 0; ++} ++ ++/* Called by the slot handler thread */ ++static void ++parse_rx_slots(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_SHARED_STATE_T *remote = state->remote; ++ VCHIQ_SERVICE_T *service = NULL; ++ int tx_pos; ++ DEBUG_INITIALISE(state->local) ++ ++ tx_pos = remote->tx_pos; ++ ++ while (state->rx_pos != tx_pos) { ++ VCHIQ_HEADER_T *header; ++ int msgid, size; ++ int type; ++ unsigned int localport, remoteport; ++ ++ DEBUG_TRACE(PARSE_LINE); ++ if (!state->rx_data) { ++ int rx_index; ++ WARN_ON(!((state->rx_pos & VCHIQ_SLOT_MASK) == 0)); ++ rx_index = remote->slot_queue[ ++ SLOT_QUEUE_INDEX_FROM_POS(state->rx_pos) & ++ VCHIQ_SLOT_QUEUE_MASK]; ++ state->rx_data = (char *)SLOT_DATA_FROM_INDEX(state, ++ rx_index); ++ state->rx_info = SLOT_INFO_FROM_INDEX(state, rx_index); ++ ++ /* Initialise use_count to one, and increment ++ ** release_count at the end of the slot to avoid ++ ** releasing the slot prematurely. */ ++ state->rx_info->use_count = 1; ++ state->rx_info->release_count = 0; ++ } ++ ++ header = (VCHIQ_HEADER_T *)(state->rx_data + ++ (state->rx_pos & VCHIQ_SLOT_MASK)); ++ DEBUG_VALUE(PARSE_HEADER, (int)header); ++ msgid = header->msgid; ++ DEBUG_VALUE(PARSE_MSGID, msgid); ++ size = header->size; ++ type = VCHIQ_MSG_TYPE(msgid); ++ localport = VCHIQ_MSG_DSTPORT(msgid); ++ remoteport = VCHIQ_MSG_SRCPORT(msgid); ++ ++ if (type != VCHIQ_MSG_DATA) ++ VCHIQ_STATS_INC(state, ctrl_rx_count); ++ ++ switch (type) { ++ case VCHIQ_MSG_OPENACK: ++ case VCHIQ_MSG_CLOSE: ++ case VCHIQ_MSG_DATA: ++ case VCHIQ_MSG_BULK_RX: ++ case VCHIQ_MSG_BULK_TX: ++ case VCHIQ_MSG_BULK_RX_DONE: ++ case VCHIQ_MSG_BULK_TX_DONE: ++ service = find_service_by_port(state, localport); ++ if ((!service || ++ ((service->remoteport != remoteport) && ++ (service->remoteport != VCHIQ_PORT_FREE))) && ++ (localport == 0) && ++ (type == VCHIQ_MSG_CLOSE)) { ++ /* This could be a CLOSE from a client which ++ hadn't yet received the OPENACK - look for ++ the connected service */ ++ if (service) ++ unlock_service(service); ++ service = get_connected_service(state, ++ remoteport); ++ if (service) ++ vchiq_log_warning(vchiq_core_log_level, ++ "%d: prs %s@%x (%d->%d) - " ++ "found connected service %d", ++ state->id, msg_type_str(type), ++ (unsigned int)header, ++ remoteport, localport, ++ service->localport); ++ } ++ ++ if (!service) { ++ vchiq_log_error(vchiq_core_log_level, ++ "%d: prs %s@%x (%d->%d) - " ++ "invalid/closed service %d", ++ state->id, msg_type_str(type), ++ (unsigned int)header, ++ remoteport, localport, localport); ++ goto skip_message; ++ } ++ break; ++ default: ++ break; ++ } ++ ++ if (SRVTRACE_ENABLED(service, VCHIQ_LOG_INFO)) { ++ int svc_fourcc; ++ ++ svc_fourcc = service ++ ? service->base.fourcc ++ : VCHIQ_MAKE_FOURCC('?', '?', '?', '?'); ++ vchiq_log_info(SRVTRACE_LEVEL(service), ++ "Rcvd Msg %s(%u) from %c%c%c%c s:%d d:%d " ++ "len:%d", ++ msg_type_str(type), type, ++ VCHIQ_FOURCC_AS_4CHARS(svc_fourcc), ++ remoteport, localport, size); ++ if (size > 0) ++ vchiq_log_dump_mem("Rcvd", 0, header->data, ++ min(64, size)); ++ } ++ ++ if (((unsigned int)header & VCHIQ_SLOT_MASK) + calc_stride(size) ++ > VCHIQ_SLOT_SIZE) { ++ vchiq_log_error(vchiq_core_log_level, ++ "header %x (msgid %x) - size %x too big for " ++ "slot", ++ (unsigned int)header, (unsigned int)msgid, ++ (unsigned int)size); ++ WARN(1, "oversized for slot\n"); ++ } ++ ++ switch (type) { ++ case VCHIQ_MSG_OPEN: ++ WARN_ON(!(VCHIQ_MSG_DSTPORT(msgid) == 0)); ++ if (!parse_open(state, header)) ++ goto bail_not_ready; ++ break; ++ case VCHIQ_MSG_OPENACK: ++ if (size >= sizeof(struct vchiq_openack_payload)) { ++ const struct vchiq_openack_payload *payload = ++ (struct vchiq_openack_payload *) ++ header->data; ++ service->peer_version = payload->version; ++ } ++ vchiq_log_info(vchiq_core_log_level, ++ "%d: prs OPENACK@%x,%x (%d->%d) v:%d", ++ state->id, (unsigned int)header, size, ++ remoteport, localport, service->peer_version); ++ if (service->srvstate == ++ VCHIQ_SRVSTATE_OPENING) { ++ service->remoteport = remoteport; ++ vchiq_set_service_state(service, ++ VCHIQ_SRVSTATE_OPEN); ++ up(&service->remove_event); ++ } else ++ vchiq_log_error(vchiq_core_log_level, ++ "OPENACK received in state %s", ++ srvstate_names[service->srvstate]); ++ break; ++ case VCHIQ_MSG_CLOSE: ++ WARN_ON(size != 0); /* There should be no data */ ++ ++ vchiq_log_info(vchiq_core_log_level, ++ "%d: prs CLOSE@%x (%d->%d)", ++ state->id, (unsigned int)header, ++ remoteport, localport); ++ ++ mark_service_closing_internal(service, 1); ++ ++ if (vchiq_close_service_internal(service, ++ 1/*close_recvd*/) == VCHIQ_RETRY) ++ goto bail_not_ready; ++ ++ vchiq_log_info(vchiq_core_log_level, ++ "Close Service %c%c%c%c s:%u d:%d", ++ VCHIQ_FOURCC_AS_4CHARS(service->base.fourcc), ++ service->localport, ++ service->remoteport); ++ break; ++ case VCHIQ_MSG_DATA: ++ vchiq_log_info(vchiq_core_log_level, ++ "%d: prs DATA@%x,%x (%d->%d)", ++ state->id, (unsigned int)header, size, ++ remoteport, localport); ++ ++ if ((service->remoteport == remoteport) ++ && (service->srvstate == ++ VCHIQ_SRVSTATE_OPEN)) { ++ header->msgid = msgid | VCHIQ_MSGID_CLAIMED; ++ claim_slot(state->rx_info); ++ DEBUG_TRACE(PARSE_LINE); ++ if (make_service_callback(service, ++ VCHIQ_MESSAGE_AVAILABLE, header, ++ NULL) == VCHIQ_RETRY) { ++ DEBUG_TRACE(PARSE_LINE); ++ goto bail_not_ready; ++ } ++ VCHIQ_SERVICE_STATS_INC(service, ctrl_rx_count); ++ VCHIQ_SERVICE_STATS_ADD(service, ctrl_rx_bytes, ++ size); ++ } else { ++ VCHIQ_STATS_INC(state, error_count); ++ } ++ break; ++ case VCHIQ_MSG_CONNECT: ++ vchiq_log_info(vchiq_core_log_level, ++ "%d: prs CONNECT@%x", ++ state->id, (unsigned int)header); ++ state->version_common = ((VCHIQ_SLOT_ZERO_T *) ++ state->slot_data)->version; ++ up(&state->connect); ++ break; ++ case VCHIQ_MSG_BULK_RX: ++ case VCHIQ_MSG_BULK_TX: { ++ VCHIQ_BULK_QUEUE_T *queue; ++ WARN_ON(!state->is_master); ++ queue = (type == VCHIQ_MSG_BULK_RX) ? ++ &service->bulk_tx : &service->bulk_rx; ++ if ((service->remoteport == remoteport) ++ && (service->srvstate == ++ VCHIQ_SRVSTATE_OPEN)) { ++ VCHIQ_BULK_T *bulk; ++ int resolved = 0; ++ ++ DEBUG_TRACE(PARSE_LINE); ++ if (mutex_lock_interruptible( ++ &service->bulk_mutex) != 0) { ++ DEBUG_TRACE(PARSE_LINE); ++ goto bail_not_ready; ++ } ++ ++ WARN_ON(!(queue->remote_insert < queue->remove + ++ VCHIQ_NUM_SERVICE_BULKS)); ++ bulk = &queue->bulks[ ++ BULK_INDEX(queue->remote_insert)]; ++ bulk->remote_data = ++ (void *)((int *)header->data)[0]; ++ bulk->remote_size = ((int *)header->data)[1]; ++ wmb(); ++ ++ vchiq_log_info(vchiq_core_log_level, ++ "%d: prs %s@%x (%d->%d) %x@%x", ++ state->id, msg_type_str(type), ++ (unsigned int)header, ++ remoteport, localport, ++ bulk->remote_size, ++ (unsigned int)bulk->remote_data); ++ ++ queue->remote_insert++; ++ ++ if (atomic_read(&pause_bulks_count)) { ++ state->deferred_bulks++; ++ vchiq_log_info(vchiq_core_log_level, ++ "%s: deferring bulk (%d)", ++ __func__, ++ state->deferred_bulks); ++ if (state->conn_state != ++ VCHIQ_CONNSTATE_PAUSE_SENT) ++ vchiq_log_error( ++ vchiq_core_log_level, ++ "%s: bulks paused in " ++ "unexpected state %s", ++ __func__, ++ conn_state_names[ ++ state->conn_state]); ++ } else if (state->conn_state == ++ VCHIQ_CONNSTATE_CONNECTED) { ++ DEBUG_TRACE(PARSE_LINE); ++ resolved = resolve_bulks(service, ++ queue); ++ } ++ ++ mutex_unlock(&service->bulk_mutex); ++ if (resolved) ++ notify_bulks(service, queue, ++ 1/*retry_poll*/); ++ } ++ } break; ++ case VCHIQ_MSG_BULK_RX_DONE: ++ case VCHIQ_MSG_BULK_TX_DONE: ++ WARN_ON(state->is_master); ++ if ((service->remoteport == remoteport) ++ && (service->srvstate != ++ VCHIQ_SRVSTATE_FREE)) { ++ VCHIQ_BULK_QUEUE_T *queue; ++ VCHIQ_BULK_T *bulk; ++ ++ queue = (type == VCHIQ_MSG_BULK_RX_DONE) ? ++ &service->bulk_rx : &service->bulk_tx; ++ ++ DEBUG_TRACE(PARSE_LINE); ++ if (mutex_lock_interruptible( ++ &service->bulk_mutex) != 0) { ++ DEBUG_TRACE(PARSE_LINE); ++ goto bail_not_ready; ++ } ++ if ((int)(queue->remote_insert - ++ queue->local_insert) >= 0) { ++ vchiq_log_error(vchiq_core_log_level, ++ "%d: prs %s@%x (%d->%d) " ++ "unexpected (ri=%d,li=%d)", ++ state->id, msg_type_str(type), ++ (unsigned int)header, ++ remoteport, localport, ++ queue->remote_insert, ++ queue->local_insert); ++ mutex_unlock(&service->bulk_mutex); ++ break; ++ } ++ ++ BUG_ON(queue->process == queue->local_insert); ++ BUG_ON(queue->process != queue->remote_insert); ++ ++ bulk = &queue->bulks[ ++ BULK_INDEX(queue->remote_insert)]; ++ bulk->actual = *(int *)header->data; ++ queue->remote_insert++; ++ ++ vchiq_log_info(vchiq_core_log_level, ++ "%d: prs %s@%x (%d->%d) %x@%x", ++ state->id, msg_type_str(type), ++ (unsigned int)header, ++ remoteport, localport, ++ bulk->actual, (unsigned int)bulk->data); ++ ++ vchiq_log_trace(vchiq_core_log_level, ++ "%d: prs:%d %cx li=%x ri=%x p=%x", ++ state->id, localport, ++ (type == VCHIQ_MSG_BULK_RX_DONE) ? ++ 'r' : 't', ++ queue->local_insert, ++ queue->remote_insert, queue->process); ++ ++ DEBUG_TRACE(PARSE_LINE); ++ WARN_ON(queue->process == queue->local_insert); ++ vchiq_complete_bulk(bulk); ++ queue->process++; ++ mutex_unlock(&service->bulk_mutex); ++ DEBUG_TRACE(PARSE_LINE); ++ notify_bulks(service, queue, 1/*retry_poll*/); ++ DEBUG_TRACE(PARSE_LINE); ++ } ++ break; ++ case VCHIQ_MSG_PADDING: ++ vchiq_log_trace(vchiq_core_log_level, ++ "%d: prs PADDING@%x,%x", ++ state->id, (unsigned int)header, size); ++ break; ++ case VCHIQ_MSG_PAUSE: ++ /* If initiated, signal the application thread */ ++ vchiq_log_trace(vchiq_core_log_level, ++ "%d: prs PAUSE@%x,%x", ++ state->id, (unsigned int)header, size); ++ if (state->conn_state == VCHIQ_CONNSTATE_PAUSED) { ++ vchiq_log_error(vchiq_core_log_level, ++ "%d: PAUSE received in state PAUSED", ++ state->id); ++ break; ++ } ++ if (state->conn_state != VCHIQ_CONNSTATE_PAUSE_SENT) { ++ /* Send a PAUSE in response */ ++ if (queue_message(state, NULL, ++ VCHIQ_MAKE_MSG(VCHIQ_MSG_PAUSE, 0, 0), ++ NULL, 0, 0, QMFLAGS_NO_MUTEX_UNLOCK) ++ == VCHIQ_RETRY) ++ goto bail_not_ready; ++ if (state->is_master) ++ pause_bulks(state); ++ } ++ /* At this point slot_mutex is held */ ++ vchiq_set_conn_state(state, VCHIQ_CONNSTATE_PAUSED); ++ vchiq_platform_paused(state); ++ break; ++ case VCHIQ_MSG_RESUME: ++ vchiq_log_trace(vchiq_core_log_level, ++ "%d: prs RESUME@%x,%x", ++ state->id, (unsigned int)header, size); ++ /* Release the slot mutex */ ++ mutex_unlock(&state->slot_mutex); ++ if (state->is_master) ++ resume_bulks(state); ++ vchiq_set_conn_state(state, VCHIQ_CONNSTATE_CONNECTED); ++ vchiq_platform_resumed(state); ++ break; ++ ++ case VCHIQ_MSG_REMOTE_USE: ++ vchiq_on_remote_use(state); ++ break; ++ case VCHIQ_MSG_REMOTE_RELEASE: ++ vchiq_on_remote_release(state); ++ break; ++ case VCHIQ_MSG_REMOTE_USE_ACTIVE: ++ vchiq_on_remote_use_active(state); ++ break; ++ ++ default: ++ vchiq_log_error(vchiq_core_log_level, ++ "%d: prs invalid msgid %x@%x,%x", ++ state->id, msgid, (unsigned int)header, size); ++ WARN(1, "invalid message\n"); ++ break; ++ } ++ ++skip_message: ++ if (service) { ++ unlock_service(service); ++ service = NULL; ++ } ++ ++ state->rx_pos += calc_stride(size); ++ ++ DEBUG_TRACE(PARSE_LINE); ++ /* Perform some housekeeping when the end of the slot is ++ ** reached. */ ++ if ((state->rx_pos & VCHIQ_SLOT_MASK) == 0) { ++ /* Remove the extra reference count. */ ++ release_slot(state, state->rx_info, NULL, NULL); ++ state->rx_data = NULL; ++ } ++ } ++ ++bail_not_ready: ++ if (service) ++ unlock_service(service); ++} ++ ++/* Called by the slot handler thread */ ++static int ++slot_handler_func(void *v) ++{ ++ VCHIQ_STATE_T *state = (VCHIQ_STATE_T *) v; ++ VCHIQ_SHARED_STATE_T *local = state->local; ++ DEBUG_INITIALISE(local) ++ ++ while (1) { ++ DEBUG_COUNT(SLOT_HANDLER_COUNT); ++ DEBUG_TRACE(SLOT_HANDLER_LINE); ++ remote_event_wait(&local->trigger); ++ ++ rmb(); ++ ++ DEBUG_TRACE(SLOT_HANDLER_LINE); ++ if (state->poll_needed) { ++ /* Check if we need to suspend - may change our ++ * conn_state */ ++ vchiq_platform_check_suspend(state); ++ ++ state->poll_needed = 0; ++ ++ /* Handle service polling and other rare conditions here ++ ** out of the mainline code */ ++ switch (state->conn_state) { ++ case VCHIQ_CONNSTATE_CONNECTED: ++ /* Poll the services as requested */ ++ poll_services(state); ++ break; ++ ++ case VCHIQ_CONNSTATE_PAUSING: ++ if (state->is_master) ++ pause_bulks(state); ++ if (queue_message(state, NULL, ++ VCHIQ_MAKE_MSG(VCHIQ_MSG_PAUSE, 0, 0), ++ NULL, 0, 0, ++ QMFLAGS_NO_MUTEX_UNLOCK) ++ != VCHIQ_RETRY) { ++ vchiq_set_conn_state(state, ++ VCHIQ_CONNSTATE_PAUSE_SENT); ++ } else { ++ if (state->is_master) ++ resume_bulks(state); ++ /* Retry later */ ++ state->poll_needed = 1; ++ } ++ break; ++ ++ case VCHIQ_CONNSTATE_PAUSED: ++ vchiq_platform_resume(state); ++ break; ++ ++ case VCHIQ_CONNSTATE_RESUMING: ++ if (queue_message(state, NULL, ++ VCHIQ_MAKE_MSG(VCHIQ_MSG_RESUME, 0, 0), ++ NULL, 0, 0, QMFLAGS_NO_MUTEX_LOCK) ++ != VCHIQ_RETRY) { ++ if (state->is_master) ++ resume_bulks(state); ++ vchiq_set_conn_state(state, ++ VCHIQ_CONNSTATE_CONNECTED); ++ vchiq_platform_resumed(state); ++ } else { ++ /* This should really be impossible, ++ ** since the PAUSE should have flushed ++ ** through outstanding messages. */ ++ vchiq_log_error(vchiq_core_log_level, ++ "Failed to send RESUME " ++ "message"); ++ BUG(); ++ } ++ break; ++ ++ case VCHIQ_CONNSTATE_PAUSE_TIMEOUT: ++ case VCHIQ_CONNSTATE_RESUME_TIMEOUT: ++ vchiq_platform_handle_timeout(state); ++ break; ++ default: ++ break; ++ } ++ ++ ++ } ++ ++ DEBUG_TRACE(SLOT_HANDLER_LINE); ++ parse_rx_slots(state); ++ } ++ return 0; ++} ++ ++ ++/* Called by the recycle thread */ ++static int ++recycle_func(void *v) ++{ ++ VCHIQ_STATE_T *state = (VCHIQ_STATE_T *) v; ++ VCHIQ_SHARED_STATE_T *local = state->local; ++ ++ while (1) { ++ remote_event_wait(&local->recycle); ++ ++ process_free_queue(state); ++ } ++ return 0; ++} ++ ++ ++/* Called by the sync thread */ ++static int ++sync_func(void *v) ++{ ++ VCHIQ_STATE_T *state = (VCHIQ_STATE_T *) v; ++ VCHIQ_SHARED_STATE_T *local = state->local; ++ VCHIQ_HEADER_T *header = (VCHIQ_HEADER_T *)SLOT_DATA_FROM_INDEX(state, ++ state->remote->slot_sync); ++ ++ while (1) { ++ VCHIQ_SERVICE_T *service; ++ int msgid, size; ++ int type; ++ unsigned int localport, remoteport; ++ ++ remote_event_wait(&local->sync_trigger); ++ ++ rmb(); ++ ++ msgid = header->msgid; ++ size = header->size; ++ type = VCHIQ_MSG_TYPE(msgid); ++ localport = VCHIQ_MSG_DSTPORT(msgid); ++ remoteport = VCHIQ_MSG_SRCPORT(msgid); ++ ++ service = find_service_by_port(state, localport); ++ ++ if (!service) { ++ vchiq_log_error(vchiq_sync_log_level, ++ "%d: sf %s@%x (%d->%d) - " ++ "invalid/closed service %d", ++ state->id, msg_type_str(type), ++ (unsigned int)header, ++ remoteport, localport, localport); ++ release_message_sync(state, header); ++ continue; ++ } ++ ++ if (vchiq_sync_log_level >= VCHIQ_LOG_TRACE) { ++ int svc_fourcc; ++ ++ svc_fourcc = service ++ ? service->base.fourcc ++ : VCHIQ_MAKE_FOURCC('?', '?', '?', '?'); ++ vchiq_log_trace(vchiq_sync_log_level, ++ "Rcvd Msg %s from %c%c%c%c s:%d d:%d len:%d", ++ msg_type_str(type), ++ VCHIQ_FOURCC_AS_4CHARS(svc_fourcc), ++ remoteport, localport, size); ++ if (size > 0) ++ vchiq_log_dump_mem("Rcvd", 0, header->data, ++ min(64, size)); ++ } ++ ++ switch (type) { ++ case VCHIQ_MSG_OPENACK: ++ if (size >= sizeof(struct vchiq_openack_payload)) { ++ const struct vchiq_openack_payload *payload = ++ (struct vchiq_openack_payload *) ++ header->data; ++ service->peer_version = payload->version; ++ } ++ vchiq_log_info(vchiq_sync_log_level, ++ "%d: sf OPENACK@%x,%x (%d->%d) v:%d", ++ state->id, (unsigned int)header, size, ++ remoteport, localport, service->peer_version); ++ if (service->srvstate == VCHIQ_SRVSTATE_OPENING) { ++ service->remoteport = remoteport; ++ vchiq_set_service_state(service, ++ VCHIQ_SRVSTATE_OPENSYNC); ++ service->sync = 1; ++ up(&service->remove_event); ++ } ++ release_message_sync(state, header); ++ break; ++ ++ case VCHIQ_MSG_DATA: ++ vchiq_log_trace(vchiq_sync_log_level, ++ "%d: sf DATA@%x,%x (%d->%d)", ++ state->id, (unsigned int)header, size, ++ remoteport, localport); ++ ++ if ((service->remoteport == remoteport) && ++ (service->srvstate == ++ VCHIQ_SRVSTATE_OPENSYNC)) { ++ if (make_service_callback(service, ++ VCHIQ_MESSAGE_AVAILABLE, header, ++ NULL) == VCHIQ_RETRY) ++ vchiq_log_error(vchiq_sync_log_level, ++ "synchronous callback to " ++ "service %d returns " ++ "VCHIQ_RETRY", ++ localport); ++ } ++ break; ++ ++ default: ++ vchiq_log_error(vchiq_sync_log_level, ++ "%d: sf unexpected msgid %x@%x,%x", ++ state->id, msgid, (unsigned int)header, size); ++ release_message_sync(state, header); ++ break; ++ } ++ ++ unlock_service(service); ++ } ++ ++ return 0; ++} ++ ++ ++static void ++init_bulk_queue(VCHIQ_BULK_QUEUE_T *queue) ++{ ++ queue->local_insert = 0; ++ queue->remote_insert = 0; ++ queue->process = 0; ++ queue->remote_notify = 0; ++ queue->remove = 0; ++} ++ ++ ++inline const char * ++get_conn_state_name(VCHIQ_CONNSTATE_T conn_state) ++{ ++ return conn_state_names[conn_state]; ++} ++ ++ ++VCHIQ_SLOT_ZERO_T * ++vchiq_init_slots(void *mem_base, int mem_size) ++{ ++ int mem_align = (VCHIQ_SLOT_SIZE - (int)mem_base) & VCHIQ_SLOT_MASK; ++ VCHIQ_SLOT_ZERO_T *slot_zero = ++ (VCHIQ_SLOT_ZERO_T *)((char *)mem_base + mem_align); ++ int num_slots = (mem_size - mem_align)/VCHIQ_SLOT_SIZE; ++ int first_data_slot = VCHIQ_SLOT_ZERO_SLOTS; ++ ++ /* Ensure there is enough memory to run an absolutely minimum system */ ++ num_slots -= first_data_slot; ++ ++ if (num_slots < 4) { ++ vchiq_log_error(vchiq_core_log_level, ++ "vchiq_init_slots - insufficient memory %x bytes", ++ mem_size); ++ return NULL; ++ } ++ ++ memset(slot_zero, 0, sizeof(VCHIQ_SLOT_ZERO_T)); ++ ++ slot_zero->magic = VCHIQ_MAGIC; ++ slot_zero->version = VCHIQ_VERSION; ++ slot_zero->version_min = VCHIQ_VERSION_MIN; ++ slot_zero->slot_zero_size = sizeof(VCHIQ_SLOT_ZERO_T); ++ slot_zero->slot_size = VCHIQ_SLOT_SIZE; ++ slot_zero->max_slots = VCHIQ_MAX_SLOTS; ++ slot_zero->max_slots_per_side = VCHIQ_MAX_SLOTS_PER_SIDE; ++ ++ slot_zero->master.slot_sync = first_data_slot; ++ slot_zero->master.slot_first = first_data_slot + 1; ++ slot_zero->master.slot_last = first_data_slot + (num_slots/2) - 1; ++ slot_zero->slave.slot_sync = first_data_slot + (num_slots/2); ++ slot_zero->slave.slot_first = first_data_slot + (num_slots/2) + 1; ++ slot_zero->slave.slot_last = first_data_slot + num_slots - 1; ++ ++ return slot_zero; ++} ++ ++VCHIQ_STATUS_T ++vchiq_init_state(VCHIQ_STATE_T *state, VCHIQ_SLOT_ZERO_T *slot_zero, ++ int is_master) ++{ ++ VCHIQ_SHARED_STATE_T *local; ++ VCHIQ_SHARED_STATE_T *remote; ++ VCHIQ_STATUS_T status; ++ char threadname[10]; ++ static int id; ++ int i; ++ ++ vchiq_log_warning(vchiq_core_log_level, ++ "%s: slot_zero = 0x%08lx, is_master = %d", ++ __func__, (unsigned long)slot_zero, is_master); ++ ++ /* Check the input configuration */ ++ ++ if (slot_zero->magic != VCHIQ_MAGIC) { ++ vchiq_loud_error_header(); ++ vchiq_loud_error("Invalid VCHIQ magic value found."); ++ vchiq_loud_error("slot_zero=%x: magic=%x (expected %x)", ++ (unsigned int)slot_zero, slot_zero->magic, VCHIQ_MAGIC); ++ vchiq_loud_error_footer(); ++ return VCHIQ_ERROR; ++ } ++ ++ if (slot_zero->version < VCHIQ_VERSION_MIN) { ++ vchiq_loud_error_header(); ++ vchiq_loud_error("Incompatible VCHIQ versions found."); ++ vchiq_loud_error("slot_zero=%x: VideoCore version=%d " ++ "(minimum %d)", ++ (unsigned int)slot_zero, slot_zero->version, ++ VCHIQ_VERSION_MIN); ++ vchiq_loud_error("Restart with a newer VideoCore image."); ++ vchiq_loud_error_footer(); ++ return VCHIQ_ERROR; ++ } ++ ++ if (VCHIQ_VERSION < slot_zero->version_min) { ++ vchiq_loud_error_header(); ++ vchiq_loud_error("Incompatible VCHIQ versions found."); ++ vchiq_loud_error("slot_zero=%x: version=%d (VideoCore " ++ "minimum %d)", ++ (unsigned int)slot_zero, VCHIQ_VERSION, ++ slot_zero->version_min); ++ vchiq_loud_error("Restart with a newer kernel."); ++ vchiq_loud_error_footer(); ++ return VCHIQ_ERROR; ++ } ++ ++ if ((slot_zero->slot_zero_size != sizeof(VCHIQ_SLOT_ZERO_T)) || ++ (slot_zero->slot_size != VCHIQ_SLOT_SIZE) || ++ (slot_zero->max_slots != VCHIQ_MAX_SLOTS) || ++ (slot_zero->max_slots_per_side != VCHIQ_MAX_SLOTS_PER_SIDE)) { ++ vchiq_loud_error_header(); ++ if (slot_zero->slot_zero_size != sizeof(VCHIQ_SLOT_ZERO_T)) ++ vchiq_loud_error("slot_zero=%x: slot_zero_size=%x " ++ "(expected %x)", ++ (unsigned int)slot_zero, ++ slot_zero->slot_zero_size, ++ sizeof(VCHIQ_SLOT_ZERO_T)); ++ if (slot_zero->slot_size != VCHIQ_SLOT_SIZE) ++ vchiq_loud_error("slot_zero=%x: slot_size=%d " ++ "(expected %d", ++ (unsigned int)slot_zero, slot_zero->slot_size, ++ VCHIQ_SLOT_SIZE); ++ if (slot_zero->max_slots != VCHIQ_MAX_SLOTS) ++ vchiq_loud_error("slot_zero=%x: max_slots=%d " ++ "(expected %d)", ++ (unsigned int)slot_zero, slot_zero->max_slots, ++ VCHIQ_MAX_SLOTS); ++ if (slot_zero->max_slots_per_side != VCHIQ_MAX_SLOTS_PER_SIDE) ++ vchiq_loud_error("slot_zero=%x: max_slots_per_side=%d " ++ "(expected %d)", ++ (unsigned int)slot_zero, ++ slot_zero->max_slots_per_side, ++ VCHIQ_MAX_SLOTS_PER_SIDE); ++ vchiq_loud_error_footer(); ++ return VCHIQ_ERROR; ++ } ++ ++ if (VCHIQ_VERSION < slot_zero->version) ++ slot_zero->version = VCHIQ_VERSION; ++ ++ if (is_master) { ++ local = &slot_zero->master; ++ remote = &slot_zero->slave; ++ } else { ++ local = &slot_zero->slave; ++ remote = &slot_zero->master; ++ } ++ ++ if (local->initialised) { ++ vchiq_loud_error_header(); ++ if (remote->initialised) ++ vchiq_loud_error("local state has already been " ++ "initialised"); ++ else ++ vchiq_loud_error("master/slave mismatch - two %ss", ++ is_master ? "master" : "slave"); ++ vchiq_loud_error_footer(); ++ return VCHIQ_ERROR; ++ } ++ ++ memset(state, 0, sizeof(VCHIQ_STATE_T)); ++ ++ state->id = id++; ++ state->is_master = is_master; ++ ++ /* ++ initialize shared state pointers ++ */ ++ ++ state->local = local; ++ state->remote = remote; ++ state->slot_data = (VCHIQ_SLOT_T *)slot_zero; ++ ++ /* ++ initialize events and mutexes ++ */ ++ ++ sema_init(&state->connect, 0); ++ mutex_init(&state->mutex); ++ sema_init(&state->trigger_event, 0); ++ sema_init(&state->recycle_event, 0); ++ sema_init(&state->sync_trigger_event, 0); ++ sema_init(&state->sync_release_event, 0); ++ ++ mutex_init(&state->slot_mutex); ++ mutex_init(&state->recycle_mutex); ++ mutex_init(&state->sync_mutex); ++ mutex_init(&state->bulk_transfer_mutex); ++ ++ sema_init(&state->slot_available_event, 0); ++ sema_init(&state->slot_remove_event, 0); ++ sema_init(&state->data_quota_event, 0); ++ ++ state->slot_queue_available = 0; ++ ++ for (i = 0; i < VCHIQ_MAX_SERVICES; i++) { ++ VCHIQ_SERVICE_QUOTA_T *service_quota = ++ &state->service_quotas[i]; ++ sema_init(&service_quota->quota_event, 0); ++ } ++ ++ for (i = local->slot_first; i <= local->slot_last; i++) { ++ local->slot_queue[state->slot_queue_available++] = i; ++ up(&state->slot_available_event); ++ } ++ ++ state->default_slot_quota = state->slot_queue_available/2; ++ state->default_message_quota = ++ min((unsigned short)(state->default_slot_quota * 256), ++ (unsigned short)~0); ++ ++ state->previous_data_index = -1; ++ state->data_use_count = 0; ++ state->data_quota = state->slot_queue_available - 1; ++ ++ local->trigger.event = &state->trigger_event; ++ remote_event_create(&local->trigger); ++ local->tx_pos = 0; ++ ++ local->recycle.event = &state->recycle_event; ++ remote_event_create(&local->recycle); ++ local->slot_queue_recycle = state->slot_queue_available; ++ ++ local->sync_trigger.event = &state->sync_trigger_event; ++ remote_event_create(&local->sync_trigger); ++ ++ local->sync_release.event = &state->sync_release_event; ++ remote_event_create(&local->sync_release); ++ ++ /* At start-of-day, the slot is empty and available */ ++ ((VCHIQ_HEADER_T *)SLOT_DATA_FROM_INDEX(state, local->slot_sync))->msgid ++ = VCHIQ_MSGID_PADDING; ++ remote_event_signal_local(&local->sync_release); ++ ++ local->debug[DEBUG_ENTRIES] = DEBUG_MAX; ++ ++ status = vchiq_platform_init_state(state); ++ ++ /* ++ bring up slot handler thread ++ */ ++ snprintf(threadname, sizeof(threadname), "VCHIQ-%d", state->id); ++ state->slot_handler_thread = kthread_create(&slot_handler_func, ++ (void *)state, ++ threadname); ++ ++ if (state->slot_handler_thread == NULL) { ++ vchiq_loud_error_header(); ++ vchiq_loud_error("couldn't create thread %s", threadname); ++ vchiq_loud_error_footer(); ++ return VCHIQ_ERROR; ++ } ++ set_user_nice(state->slot_handler_thread, -19); ++ wake_up_process(state->slot_handler_thread); ++ ++ snprintf(threadname, sizeof(threadname), "VCHIQr-%d", state->id); ++ state->recycle_thread = kthread_create(&recycle_func, ++ (void *)state, ++ threadname); ++ if (state->recycle_thread == NULL) { ++ vchiq_loud_error_header(); ++ vchiq_loud_error("couldn't create thread %s", threadname); ++ vchiq_loud_error_footer(); ++ return VCHIQ_ERROR; ++ } ++ set_user_nice(state->recycle_thread, -19); ++ wake_up_process(state->recycle_thread); ++ ++ snprintf(threadname, sizeof(threadname), "VCHIQs-%d", state->id); ++ state->sync_thread = kthread_create(&sync_func, ++ (void *)state, ++ threadname); ++ if (state->sync_thread == NULL) { ++ vchiq_loud_error_header(); ++ vchiq_loud_error("couldn't create thread %s", threadname); ++ vchiq_loud_error_footer(); ++ return VCHIQ_ERROR; ++ } ++ set_user_nice(state->sync_thread, -20); ++ wake_up_process(state->sync_thread); ++ ++ BUG_ON(state->id >= VCHIQ_MAX_STATES); ++ vchiq_states[state->id] = state; ++ ++ /* Indicate readiness to the other side */ ++ local->initialised = 1; ++ ++ return status; ++} ++ ++/* Called from application thread when a client or server service is created. */ ++VCHIQ_SERVICE_T * ++vchiq_add_service_internal(VCHIQ_STATE_T *state, ++ const VCHIQ_SERVICE_PARAMS_T *params, int srvstate, ++ VCHIQ_INSTANCE_T instance, VCHIQ_USERDATA_TERM_T userdata_term) ++{ ++ VCHIQ_SERVICE_T *service; ++ ++ service = kmalloc(sizeof(VCHIQ_SERVICE_T), GFP_KERNEL); ++ if (service) { ++ service->base.fourcc = params->fourcc; ++ service->base.callback = params->callback; ++ service->base.userdata = params->userdata; ++ service->handle = VCHIQ_SERVICE_HANDLE_INVALID; ++ service->ref_count = 1; ++ service->srvstate = VCHIQ_SRVSTATE_FREE; ++ service->userdata_term = userdata_term; ++ service->localport = VCHIQ_PORT_FREE; ++ service->remoteport = VCHIQ_PORT_FREE; ++ ++ service->public_fourcc = (srvstate == VCHIQ_SRVSTATE_OPENING) ? ++ VCHIQ_FOURCC_INVALID : params->fourcc; ++ service->client_id = 0; ++ service->auto_close = 1; ++ service->sync = 0; ++ service->closing = 0; ++ service->trace = 0; ++ atomic_set(&service->poll_flags, 0); ++ service->version = params->version; ++ service->version_min = params->version_min; ++ service->state = state; ++ service->instance = instance; ++ service->service_use_count = 0; ++ init_bulk_queue(&service->bulk_tx); ++ init_bulk_queue(&service->bulk_rx); ++ sema_init(&service->remove_event, 0); ++ sema_init(&service->bulk_remove_event, 0); ++ mutex_init(&service->bulk_mutex); ++ memset(&service->stats, 0, sizeof(service->stats)); ++ } else { ++ vchiq_log_error(vchiq_core_log_level, ++ "Out of memory"); ++ } ++ ++ if (service) { ++ VCHIQ_SERVICE_T **pservice = NULL; ++ int i; ++ ++ /* Although it is perfectly possible to use service_spinlock ++ ** to protect the creation of services, it is overkill as it ++ ** disables interrupts while the array is searched. ++ ** The only danger is of another thread trying to create a ++ ** service - service deletion is safe. ++ ** Therefore it is preferable to use state->mutex which, ++ ** although slower to claim, doesn't block interrupts while ++ ** it is held. ++ */ ++ ++ mutex_lock(&state->mutex); ++ ++ /* Prepare to use a previously unused service */ ++ if (state->unused_service < VCHIQ_MAX_SERVICES) ++ pservice = &state->services[state->unused_service]; ++ ++ if (srvstate == VCHIQ_SRVSTATE_OPENING) { ++ for (i = 0; i < state->unused_service; i++) { ++ VCHIQ_SERVICE_T *srv = state->services[i]; ++ if (!srv) { ++ pservice = &state->services[i]; ++ break; ++ } ++ } ++ } else { ++ for (i = (state->unused_service - 1); i >= 0; i--) { ++ VCHIQ_SERVICE_T *srv = state->services[i]; ++ if (!srv) ++ pservice = &state->services[i]; ++ else if ((srv->public_fourcc == params->fourcc) ++ && ((srv->instance != instance) || ++ (srv->base.callback != ++ params->callback))) { ++ /* There is another server using this ++ ** fourcc which doesn't match. */ ++ pservice = NULL; ++ break; ++ } ++ } ++ } ++ ++ if (pservice) { ++ service->localport = (pservice - state->services); ++ if (!handle_seq) ++ handle_seq = VCHIQ_MAX_STATES * ++ VCHIQ_MAX_SERVICES; ++ service->handle = handle_seq | ++ (state->id * VCHIQ_MAX_SERVICES) | ++ service->localport; ++ handle_seq += VCHIQ_MAX_STATES * VCHIQ_MAX_SERVICES; ++ *pservice = service; ++ if (pservice == &state->services[state->unused_service]) ++ state->unused_service++; ++ } ++ ++ mutex_unlock(&state->mutex); ++ ++ if (!pservice) { ++ kfree(service); ++ service = NULL; ++ } ++ } ++ ++ if (service) { ++ VCHIQ_SERVICE_QUOTA_T *service_quota = ++ &state->service_quotas[service->localport]; ++ service_quota->slot_quota = state->default_slot_quota; ++ service_quota->message_quota = state->default_message_quota; ++ if (service_quota->slot_use_count == 0) ++ service_quota->previous_tx_index = ++ SLOT_QUEUE_INDEX_FROM_POS(state->local_tx_pos) ++ - 1; ++ ++ /* Bring this service online */ ++ vchiq_set_service_state(service, srvstate); ++ ++ vchiq_log_info(vchiq_core_msg_log_level, ++ "%s Service %c%c%c%c SrcPort:%d", ++ (srvstate == VCHIQ_SRVSTATE_OPENING) ++ ? "Open" : "Add", ++ VCHIQ_FOURCC_AS_4CHARS(params->fourcc), ++ service->localport); ++ } ++ ++ /* Don't unlock the service - leave it with a ref_count of 1. */ ++ ++ return service; ++} ++ ++VCHIQ_STATUS_T ++vchiq_open_service_internal(VCHIQ_SERVICE_T *service, int client_id) ++{ ++ struct vchiq_open_payload payload = { ++ service->base.fourcc, ++ client_id, ++ service->version, ++ service->version_min ++ }; ++ VCHIQ_ELEMENT_T body = { &payload, sizeof(payload) }; ++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS; ++ ++ service->client_id = client_id; ++ vchiq_use_service_internal(service); ++ status = queue_message(service->state, NULL, ++ VCHIQ_MAKE_MSG(VCHIQ_MSG_OPEN, service->localport, 0), ++ &body, 1, sizeof(payload), QMFLAGS_IS_BLOCKING); ++ if (status == VCHIQ_SUCCESS) { ++ /* Wait for the ACK/NAK */ ++ if (down_interruptible(&service->remove_event) != 0) { ++ status = VCHIQ_RETRY; ++ vchiq_release_service_internal(service); ++ } else if ((service->srvstate != VCHIQ_SRVSTATE_OPEN) && ++ (service->srvstate != VCHIQ_SRVSTATE_OPENSYNC)) { ++ if (service->srvstate != VCHIQ_SRVSTATE_CLOSEWAIT) ++ vchiq_log_error(vchiq_core_log_level, ++ "%d: osi - srvstate = %s (ref %d)", ++ service->state->id, ++ srvstate_names[service->srvstate], ++ service->ref_count); ++ status = VCHIQ_ERROR; ++ VCHIQ_SERVICE_STATS_INC(service, error_count); ++ vchiq_release_service_internal(service); ++ } ++ } ++ return status; ++} ++ ++static void ++release_service_messages(VCHIQ_SERVICE_T *service) ++{ ++ VCHIQ_STATE_T *state = service->state; ++ int slot_last = state->remote->slot_last; ++ int i; ++ ++ /* Release any claimed messages aimed at this service */ ++ ++ if (service->sync) { ++ VCHIQ_HEADER_T *header = ++ (VCHIQ_HEADER_T *)SLOT_DATA_FROM_INDEX(state, ++ state->remote->slot_sync); ++ if (VCHIQ_MSG_DSTPORT(header->msgid) == service->localport) ++ release_message_sync(state, header); ++ ++ return; ++ } ++ ++ for (i = state->remote->slot_first; i <= slot_last; i++) { ++ VCHIQ_SLOT_INFO_T *slot_info = ++ SLOT_INFO_FROM_INDEX(state, i); ++ if (slot_info->release_count != slot_info->use_count) { ++ char *data = ++ (char *)SLOT_DATA_FROM_INDEX(state, i); ++ unsigned int pos, end; ++ ++ end = VCHIQ_SLOT_SIZE; ++ if (data == state->rx_data) ++ /* This buffer is still being read from - stop ++ ** at the current read position */ ++ end = state->rx_pos & VCHIQ_SLOT_MASK; ++ ++ pos = 0; ++ ++ while (pos < end) { ++ VCHIQ_HEADER_T *header = ++ (VCHIQ_HEADER_T *)(data + pos); ++ int msgid = header->msgid; ++ int port = VCHIQ_MSG_DSTPORT(msgid); ++ if ((port == service->localport) && ++ (msgid & VCHIQ_MSGID_CLAIMED)) { ++ vchiq_log_info(vchiq_core_log_level, ++ " fsi - hdr %x", ++ (unsigned int)header); ++ release_slot(state, slot_info, header, ++ NULL); ++ } ++ pos += calc_stride(header->size); ++ if (pos > VCHIQ_SLOT_SIZE) { ++ vchiq_log_error(vchiq_core_log_level, ++ "fsi - pos %x: header %x, " ++ "msgid %x, header->msgid %x, " ++ "header->size %x", ++ pos, (unsigned int)header, ++ msgid, header->msgid, ++ header->size); ++ WARN(1, "invalid slot position\n"); ++ } ++ } ++ } ++ } ++} ++ ++static int ++do_abort_bulks(VCHIQ_SERVICE_T *service) ++{ ++ VCHIQ_STATUS_T status; ++ ++ /* Abort any outstanding bulk transfers */ ++ if (mutex_lock_interruptible(&service->bulk_mutex) != 0) ++ return 0; ++ abort_outstanding_bulks(service, &service->bulk_tx); ++ abort_outstanding_bulks(service, &service->bulk_rx); ++ mutex_unlock(&service->bulk_mutex); ++ ++ status = notify_bulks(service, &service->bulk_tx, 0/*!retry_poll*/); ++ if (status == VCHIQ_SUCCESS) ++ status = notify_bulks(service, &service->bulk_rx, ++ 0/*!retry_poll*/); ++ return (status == VCHIQ_SUCCESS); ++} ++ ++static VCHIQ_STATUS_T ++close_service_complete(VCHIQ_SERVICE_T *service, int failstate) ++{ ++ VCHIQ_STATUS_T status; ++ int is_server = (service->public_fourcc != VCHIQ_FOURCC_INVALID); ++ int newstate; ++ ++ switch (service->srvstate) { ++ case VCHIQ_SRVSTATE_OPEN: ++ case VCHIQ_SRVSTATE_CLOSESENT: ++ case VCHIQ_SRVSTATE_CLOSERECVD: ++ if (is_server) { ++ if (service->auto_close) { ++ service->client_id = 0; ++ service->remoteport = VCHIQ_PORT_FREE; ++ newstate = VCHIQ_SRVSTATE_LISTENING; ++ } else ++ newstate = VCHIQ_SRVSTATE_CLOSEWAIT; ++ } else ++ newstate = VCHIQ_SRVSTATE_CLOSED; ++ vchiq_set_service_state(service, newstate); ++ break; ++ case VCHIQ_SRVSTATE_LISTENING: ++ break; ++ default: ++ vchiq_log_error(vchiq_core_log_level, ++ "close_service_complete(%x) called in state %s", ++ service->handle, srvstate_names[service->srvstate]); ++ WARN(1, "close_service_complete in unexpected state\n"); ++ return VCHIQ_ERROR; ++ } ++ ++ status = make_service_callback(service, ++ VCHIQ_SERVICE_CLOSED, NULL, NULL); ++ ++ if (status != VCHIQ_RETRY) { ++ int uc = service->service_use_count; ++ int i; ++ /* Complete the close process */ ++ for (i = 0; i < uc; i++) ++ /* cater for cases where close is forced and the ++ ** client may not close all it's handles */ ++ vchiq_release_service_internal(service); ++ ++ service->client_id = 0; ++ service->remoteport = VCHIQ_PORT_FREE; ++ ++ if (service->srvstate == VCHIQ_SRVSTATE_CLOSED) ++ vchiq_free_service_internal(service); ++ else if (service->srvstate != VCHIQ_SRVSTATE_CLOSEWAIT) { ++ if (is_server) ++ service->closing = 0; ++ ++ up(&service->remove_event); ++ } ++ } else ++ vchiq_set_service_state(service, failstate); ++ ++ return status; ++} ++ ++/* Called by the slot handler */ ++VCHIQ_STATUS_T ++vchiq_close_service_internal(VCHIQ_SERVICE_T *service, int close_recvd) ++{ ++ VCHIQ_STATE_T *state = service->state; ++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS; ++ int is_server = (service->public_fourcc != VCHIQ_FOURCC_INVALID); ++ ++ vchiq_log_info(vchiq_core_log_level, "%d: csi:%d,%d (%s)", ++ service->state->id, service->localport, close_recvd, ++ srvstate_names[service->srvstate]); ++ ++ switch (service->srvstate) { ++ case VCHIQ_SRVSTATE_CLOSED: ++ case VCHIQ_SRVSTATE_HIDDEN: ++ case VCHIQ_SRVSTATE_LISTENING: ++ case VCHIQ_SRVSTATE_CLOSEWAIT: ++ if (close_recvd) ++ vchiq_log_error(vchiq_core_log_level, ++ "vchiq_close_service_internal(1) called " ++ "in state %s", ++ srvstate_names[service->srvstate]); ++ else if (is_server) { ++ if (service->srvstate == VCHIQ_SRVSTATE_LISTENING) { ++ status = VCHIQ_ERROR; ++ } else { ++ service->client_id = 0; ++ service->remoteport = VCHIQ_PORT_FREE; ++ if (service->srvstate == ++ VCHIQ_SRVSTATE_CLOSEWAIT) ++ vchiq_set_service_state(service, ++ VCHIQ_SRVSTATE_LISTENING); ++ } ++ up(&service->remove_event); ++ } else ++ vchiq_free_service_internal(service); ++ break; ++ case VCHIQ_SRVSTATE_OPENING: ++ if (close_recvd) { ++ /* The open was rejected - tell the user */ ++ vchiq_set_service_state(service, ++ VCHIQ_SRVSTATE_CLOSEWAIT); ++ up(&service->remove_event); ++ } else { ++ /* Shutdown mid-open - let the other side know */ ++ status = queue_message(state, service, ++ VCHIQ_MAKE_MSG ++ (VCHIQ_MSG_CLOSE, ++ service->localport, ++ VCHIQ_MSG_DSTPORT(service->remoteport)), ++ NULL, 0, 0, 0); ++ } ++ break; ++ ++ case VCHIQ_SRVSTATE_OPENSYNC: ++ mutex_lock(&state->sync_mutex); ++ /* Drop through */ ++ ++ case VCHIQ_SRVSTATE_OPEN: ++ if (state->is_master || close_recvd) { ++ if (!do_abort_bulks(service)) ++ status = VCHIQ_RETRY; ++ } ++ ++ release_service_messages(service); ++ ++ if (status == VCHIQ_SUCCESS) ++ status = queue_message(state, service, ++ VCHIQ_MAKE_MSG ++ (VCHIQ_MSG_CLOSE, ++ service->localport, ++ VCHIQ_MSG_DSTPORT(service->remoteport)), ++ NULL, 0, 0, QMFLAGS_NO_MUTEX_UNLOCK); ++ ++ if (status == VCHIQ_SUCCESS) { ++ if (!close_recvd) { ++ /* Change the state while the mutex is ++ still held */ ++ vchiq_set_service_state(service, ++ VCHIQ_SRVSTATE_CLOSESENT); ++ mutex_unlock(&state->slot_mutex); ++ if (service->sync) ++ mutex_unlock(&state->sync_mutex); ++ break; ++ } ++ } else if (service->srvstate == VCHIQ_SRVSTATE_OPENSYNC) { ++ mutex_unlock(&state->sync_mutex); ++ break; ++ } else ++ break; ++ ++ /* Change the state while the mutex is still held */ ++ vchiq_set_service_state(service, VCHIQ_SRVSTATE_CLOSERECVD); ++ mutex_unlock(&state->slot_mutex); ++ if (service->sync) ++ mutex_unlock(&state->sync_mutex); ++ ++ status = close_service_complete(service, ++ VCHIQ_SRVSTATE_CLOSERECVD); ++ break; ++ ++ case VCHIQ_SRVSTATE_CLOSESENT: ++ if (!close_recvd) ++ /* This happens when a process is killed mid-close */ ++ break; ++ ++ if (!state->is_master) { ++ if (!do_abort_bulks(service)) { ++ status = VCHIQ_RETRY; ++ break; ++ } ++ } ++ ++ if (status == VCHIQ_SUCCESS) ++ status = close_service_complete(service, ++ VCHIQ_SRVSTATE_CLOSERECVD); ++ break; ++ ++ case VCHIQ_SRVSTATE_CLOSERECVD: ++ if (!close_recvd && is_server) ++ /* Force into LISTENING mode */ ++ vchiq_set_service_state(service, ++ VCHIQ_SRVSTATE_LISTENING); ++ status = close_service_complete(service, ++ VCHIQ_SRVSTATE_CLOSERECVD); ++ break; ++ ++ default: ++ vchiq_log_error(vchiq_core_log_level, ++ "vchiq_close_service_internal(%d) called in state %s", ++ close_recvd, srvstate_names[service->srvstate]); ++ break; ++ } ++ ++ return status; ++} ++ ++/* Called from the application process upon process death */ ++void ++vchiq_terminate_service_internal(VCHIQ_SERVICE_T *service) ++{ ++ VCHIQ_STATE_T *state = service->state; ++ ++ vchiq_log_info(vchiq_core_log_level, "%d: tsi - (%d<->%d)", ++ state->id, service->localport, service->remoteport); ++ ++ mark_service_closing(service); ++ ++ /* Mark the service for removal by the slot handler */ ++ request_poll(state, service, VCHIQ_POLL_REMOVE); ++} ++ ++/* Called from the slot handler */ ++void ++vchiq_free_service_internal(VCHIQ_SERVICE_T *service) ++{ ++ VCHIQ_STATE_T *state = service->state; ++ ++ vchiq_log_info(vchiq_core_log_level, "%d: fsi - (%d)", ++ state->id, service->localport); ++ ++ switch (service->srvstate) { ++ case VCHIQ_SRVSTATE_OPENING: ++ case VCHIQ_SRVSTATE_CLOSED: ++ case VCHIQ_SRVSTATE_HIDDEN: ++ case VCHIQ_SRVSTATE_LISTENING: ++ case VCHIQ_SRVSTATE_CLOSEWAIT: ++ break; ++ default: ++ vchiq_log_error(vchiq_core_log_level, ++ "%d: fsi - (%d) in state %s", ++ state->id, service->localport, ++ srvstate_names[service->srvstate]); ++ return; ++ } ++ ++ vchiq_set_service_state(service, VCHIQ_SRVSTATE_FREE); ++ ++ up(&service->remove_event); ++ ++ /* Release the initial lock */ ++ unlock_service(service); ++} ++ ++VCHIQ_STATUS_T ++vchiq_connect_internal(VCHIQ_STATE_T *state, VCHIQ_INSTANCE_T instance) ++{ ++ VCHIQ_SERVICE_T *service; ++ int i; ++ ++ /* Find all services registered to this client and enable them. */ ++ i = 0; ++ while ((service = next_service_by_instance(state, instance, ++ &i)) != NULL) { ++ if (service->srvstate == VCHIQ_SRVSTATE_HIDDEN) ++ vchiq_set_service_state(service, ++ VCHIQ_SRVSTATE_LISTENING); ++ unlock_service(service); ++ } ++ ++ if (state->conn_state == VCHIQ_CONNSTATE_DISCONNECTED) { ++ if (queue_message(state, NULL, ++ VCHIQ_MAKE_MSG(VCHIQ_MSG_CONNECT, 0, 0), NULL, 0, ++ 0, QMFLAGS_IS_BLOCKING) == VCHIQ_RETRY) ++ return VCHIQ_RETRY; ++ ++ vchiq_set_conn_state(state, VCHIQ_CONNSTATE_CONNECTING); ++ } ++ ++ if (state->conn_state == VCHIQ_CONNSTATE_CONNECTING) { ++ if (down_interruptible(&state->connect) != 0) ++ return VCHIQ_RETRY; ++ ++ vchiq_set_conn_state(state, VCHIQ_CONNSTATE_CONNECTED); ++ up(&state->connect); ++ } ++ ++ return VCHIQ_SUCCESS; ++} ++ ++VCHIQ_STATUS_T ++vchiq_shutdown_internal(VCHIQ_STATE_T *state, VCHIQ_INSTANCE_T instance) ++{ ++ VCHIQ_SERVICE_T *service; ++ int i; ++ ++ /* Find all services registered to this client and enable them. */ ++ i = 0; ++ while ((service = next_service_by_instance(state, instance, ++ &i)) != NULL) { ++ (void)vchiq_remove_service(service->handle); ++ unlock_service(service); ++ } ++ ++ return VCHIQ_SUCCESS; ++} ++ ++VCHIQ_STATUS_T ++vchiq_pause_internal(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS; ++ ++ switch (state->conn_state) { ++ case VCHIQ_CONNSTATE_CONNECTED: ++ /* Request a pause */ ++ vchiq_set_conn_state(state, VCHIQ_CONNSTATE_PAUSING); ++ request_poll(state, NULL, 0); ++ break; ++ default: ++ vchiq_log_error(vchiq_core_log_level, ++ "vchiq_pause_internal in state %s\n", ++ conn_state_names[state->conn_state]); ++ status = VCHIQ_ERROR; ++ VCHIQ_STATS_INC(state, error_count); ++ break; ++ } ++ ++ return status; ++} ++ ++VCHIQ_STATUS_T ++vchiq_resume_internal(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS; ++ ++ if (state->conn_state == VCHIQ_CONNSTATE_PAUSED) { ++ vchiq_set_conn_state(state, VCHIQ_CONNSTATE_RESUMING); ++ request_poll(state, NULL, 0); ++ } else { ++ status = VCHIQ_ERROR; ++ VCHIQ_STATS_INC(state, error_count); ++ } ++ ++ return status; ++} ++ ++VCHIQ_STATUS_T ++vchiq_close_service(VCHIQ_SERVICE_HANDLE_T handle) ++{ ++ /* Unregister the service */ ++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle); ++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS; ++ ++ if (!service) ++ return VCHIQ_ERROR; ++ ++ vchiq_log_info(vchiq_core_log_level, ++ "%d: close_service:%d", ++ service->state->id, service->localport); ++ ++ if ((service->srvstate == VCHIQ_SRVSTATE_FREE) || ++ (service->srvstate == VCHIQ_SRVSTATE_LISTENING) || ++ (service->srvstate == VCHIQ_SRVSTATE_HIDDEN)) { ++ unlock_service(service); ++ return VCHIQ_ERROR; ++ } ++ ++ mark_service_closing(service); ++ ++ if (current == service->state->slot_handler_thread) { ++ status = vchiq_close_service_internal(service, ++ 0/*!close_recvd*/); ++ BUG_ON(status == VCHIQ_RETRY); ++ } else { ++ /* Mark the service for termination by the slot handler */ ++ request_poll(service->state, service, VCHIQ_POLL_TERMINATE); ++ } ++ ++ while (1) { ++ if (down_interruptible(&service->remove_event) != 0) { ++ status = VCHIQ_RETRY; ++ break; ++ } ++ ++ if ((service->srvstate == VCHIQ_SRVSTATE_FREE) || ++ (service->srvstate == VCHIQ_SRVSTATE_LISTENING) || ++ (service->srvstate == VCHIQ_SRVSTATE_OPEN)) ++ break; ++ ++ vchiq_log_warning(vchiq_core_log_level, ++ "%d: close_service:%d - waiting in state %s", ++ service->state->id, service->localport, ++ srvstate_names[service->srvstate]); ++ } ++ ++ if ((status == VCHIQ_SUCCESS) && ++ (service->srvstate != VCHIQ_SRVSTATE_FREE) && ++ (service->srvstate != VCHIQ_SRVSTATE_LISTENING)) ++ status = VCHIQ_ERROR; ++ ++ unlock_service(service); ++ ++ return status; ++} ++ ++VCHIQ_STATUS_T ++vchiq_remove_service(VCHIQ_SERVICE_HANDLE_T handle) ++{ ++ /* Unregister the service */ ++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle); ++ VCHIQ_STATUS_T status = VCHIQ_SUCCESS; ++ ++ if (!service) ++ return VCHIQ_ERROR; ++ ++ vchiq_log_info(vchiq_core_log_level, ++ "%d: remove_service:%d", ++ service->state->id, service->localport); ++ ++ if (service->srvstate == VCHIQ_SRVSTATE_FREE) { ++ unlock_service(service); ++ return VCHIQ_ERROR; ++ } ++ ++ mark_service_closing(service); ++ ++ if ((service->srvstate == VCHIQ_SRVSTATE_HIDDEN) || ++ (current == service->state->slot_handler_thread)) { ++ /* Make it look like a client, because it must be removed and ++ not left in the LISTENING state. */ ++ service->public_fourcc = VCHIQ_FOURCC_INVALID; ++ ++ status = vchiq_close_service_internal(service, ++ 0/*!close_recvd*/); ++ BUG_ON(status == VCHIQ_RETRY); ++ } else { ++ /* Mark the service for removal by the slot handler */ ++ request_poll(service->state, service, VCHIQ_POLL_REMOVE); ++ } ++ while (1) { ++ if (down_interruptible(&service->remove_event) != 0) { ++ status = VCHIQ_RETRY; ++ break; ++ } ++ ++ if ((service->srvstate == VCHIQ_SRVSTATE_FREE) || ++ (service->srvstate == VCHIQ_SRVSTATE_OPEN)) ++ break; ++ ++ vchiq_log_warning(vchiq_core_log_level, ++ "%d: remove_service:%d - waiting in state %s", ++ service->state->id, service->localport, ++ srvstate_names[service->srvstate]); ++ } ++ ++ if ((status == VCHIQ_SUCCESS) && ++ (service->srvstate != VCHIQ_SRVSTATE_FREE)) ++ status = VCHIQ_ERROR; ++ ++ unlock_service(service); ++ ++ return status; ++} ++ ++ ++/* This function may be called by kernel threads or user threads. ++ * User threads may receive VCHIQ_RETRY to indicate that a signal has been ++ * received and the call should be retried after being returned to user ++ * context. ++ * When called in blocking mode, the userdata field points to a bulk_waiter ++ * structure. ++ */ ++VCHIQ_STATUS_T ++vchiq_bulk_transfer(VCHIQ_SERVICE_HANDLE_T handle, ++ VCHI_MEM_HANDLE_T memhandle, void *offset, int size, void *userdata, ++ VCHIQ_BULK_MODE_T mode, VCHIQ_BULK_DIR_T dir) ++{ ++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle); ++ VCHIQ_BULK_QUEUE_T *queue; ++ VCHIQ_BULK_T *bulk; ++ VCHIQ_STATE_T *state; ++ struct bulk_waiter *bulk_waiter = NULL; ++ const char dir_char = (dir == VCHIQ_BULK_TRANSMIT) ? 't' : 'r'; ++ const int dir_msgtype = (dir == VCHIQ_BULK_TRANSMIT) ? ++ VCHIQ_MSG_BULK_TX : VCHIQ_MSG_BULK_RX; ++ VCHIQ_STATUS_T status = VCHIQ_ERROR; ++ ++ if (!service || ++ (service->srvstate != VCHIQ_SRVSTATE_OPEN) || ++ ((memhandle == VCHI_MEM_HANDLE_INVALID) && (offset == NULL)) || ++ (vchiq_check_service(service) != VCHIQ_SUCCESS)) ++ goto error_exit; ++ ++ switch (mode) { ++ case VCHIQ_BULK_MODE_NOCALLBACK: ++ case VCHIQ_BULK_MODE_CALLBACK: ++ break; ++ case VCHIQ_BULK_MODE_BLOCKING: ++ bulk_waiter = (struct bulk_waiter *)userdata; ++ sema_init(&bulk_waiter->event, 0); ++ bulk_waiter->actual = 0; ++ bulk_waiter->bulk = NULL; ++ break; ++ case VCHIQ_BULK_MODE_WAITING: ++ bulk_waiter = (struct bulk_waiter *)userdata; ++ bulk = bulk_waiter->bulk; ++ goto waiting; ++ default: ++ goto error_exit; ++ } ++ ++ state = service->state; ++ ++ queue = (dir == VCHIQ_BULK_TRANSMIT) ? ++ &service->bulk_tx : &service->bulk_rx; ++ ++ if (mutex_lock_interruptible(&service->bulk_mutex) != 0) { ++ status = VCHIQ_RETRY; ++ goto error_exit; ++ } ++ ++ if (queue->local_insert == queue->remove + VCHIQ_NUM_SERVICE_BULKS) { ++ VCHIQ_SERVICE_STATS_INC(service, bulk_stalls); ++ do { ++ mutex_unlock(&service->bulk_mutex); ++ if (down_interruptible(&service->bulk_remove_event) ++ != 0) { ++ status = VCHIQ_RETRY; ++ goto error_exit; ++ } ++ if (mutex_lock_interruptible(&service->bulk_mutex) ++ != 0) { ++ status = VCHIQ_RETRY; ++ goto error_exit; ++ } ++ } while (queue->local_insert == queue->remove + ++ VCHIQ_NUM_SERVICE_BULKS); ++ } ++ ++ bulk = &queue->bulks[BULK_INDEX(queue->local_insert)]; ++ ++ bulk->mode = mode; ++ bulk->dir = dir; ++ bulk->userdata = userdata; ++ bulk->size = size; ++ bulk->actual = VCHIQ_BULK_ACTUAL_ABORTED; ++ ++ if (vchiq_prepare_bulk_data(bulk, memhandle, offset, size, dir) != ++ VCHIQ_SUCCESS) ++ goto unlock_error_exit; ++ ++ wmb(); ++ ++ vchiq_log_info(vchiq_core_log_level, ++ "%d: bt (%d->%d) %cx %x@%x %x", ++ state->id, ++ service->localport, service->remoteport, dir_char, ++ size, (unsigned int)bulk->data, (unsigned int)userdata); ++ ++ /* The slot mutex must be held when the service is being closed, so ++ claim it here to ensure that isn't happening */ ++ if (mutex_lock_interruptible(&state->slot_mutex) != 0) { ++ status = VCHIQ_RETRY; ++ goto cancel_bulk_error_exit; ++ } ++ ++ if (service->srvstate != VCHIQ_SRVSTATE_OPEN) ++ goto unlock_both_error_exit; ++ ++ if (state->is_master) { ++ queue->local_insert++; ++ if (resolve_bulks(service, queue)) ++ request_poll(state, service, ++ (dir == VCHIQ_BULK_TRANSMIT) ? ++ VCHIQ_POLL_TXNOTIFY : VCHIQ_POLL_RXNOTIFY); ++ } else { ++ int payload[2] = { (int)bulk->data, bulk->size }; ++ VCHIQ_ELEMENT_T element = { payload, sizeof(payload) }; ++ ++ status = queue_message(state, NULL, ++ VCHIQ_MAKE_MSG(dir_msgtype, ++ service->localport, service->remoteport), ++ &element, 1, sizeof(payload), ++ QMFLAGS_IS_BLOCKING | ++ QMFLAGS_NO_MUTEX_LOCK | ++ QMFLAGS_NO_MUTEX_UNLOCK); ++ if (status != VCHIQ_SUCCESS) { ++ goto unlock_both_error_exit; ++ } ++ queue->local_insert++; ++ } ++ ++ mutex_unlock(&state->slot_mutex); ++ mutex_unlock(&service->bulk_mutex); ++ ++ vchiq_log_trace(vchiq_core_log_level, ++ "%d: bt:%d %cx li=%x ri=%x p=%x", ++ state->id, ++ service->localport, dir_char, ++ queue->local_insert, queue->remote_insert, queue->process); ++ ++waiting: ++ unlock_service(service); ++ ++ status = VCHIQ_SUCCESS; ++ ++ if (bulk_waiter) { ++ bulk_waiter->bulk = bulk; ++ if (down_interruptible(&bulk_waiter->event) != 0) ++ status = VCHIQ_RETRY; ++ else if (bulk_waiter->actual == VCHIQ_BULK_ACTUAL_ABORTED) ++ status = VCHIQ_ERROR; ++ } ++ ++ return status; ++ ++unlock_both_error_exit: ++ mutex_unlock(&state->slot_mutex); ++cancel_bulk_error_exit: ++ vchiq_complete_bulk(bulk); ++unlock_error_exit: ++ mutex_unlock(&service->bulk_mutex); ++ ++error_exit: ++ if (service) ++ unlock_service(service); ++ return status; ++} ++ ++VCHIQ_STATUS_T ++vchiq_queue_message(VCHIQ_SERVICE_HANDLE_T handle, ++ const VCHIQ_ELEMENT_T *elements, unsigned int count) ++{ ++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle); ++ VCHIQ_STATUS_T status = VCHIQ_ERROR; ++ ++ unsigned int size = 0; ++ unsigned int i; ++ ++ if (!service || ++ (vchiq_check_service(service) != VCHIQ_SUCCESS)) ++ goto error_exit; ++ ++ for (i = 0; i < (unsigned int)count; i++) { ++ if (elements[i].size) { ++ if (elements[i].data == NULL) { ++ VCHIQ_SERVICE_STATS_INC(service, error_count); ++ goto error_exit; ++ } ++ size += elements[i].size; ++ } ++ } ++ ++ if (size > VCHIQ_MAX_MSG_SIZE) { ++ VCHIQ_SERVICE_STATS_INC(service, error_count); ++ goto error_exit; ++ } ++ ++ switch (service->srvstate) { ++ case VCHIQ_SRVSTATE_OPEN: ++ status = queue_message(service->state, service, ++ VCHIQ_MAKE_MSG(VCHIQ_MSG_DATA, ++ service->localport, ++ service->remoteport), ++ elements, count, size, 1); ++ break; ++ case VCHIQ_SRVSTATE_OPENSYNC: ++ status = queue_message_sync(service->state, service, ++ VCHIQ_MAKE_MSG(VCHIQ_MSG_DATA, ++ service->localport, ++ service->remoteport), ++ elements, count, size, 1); ++ break; ++ default: ++ status = VCHIQ_ERROR; ++ break; ++ } ++ ++error_exit: ++ if (service) ++ unlock_service(service); ++ ++ return status; ++} ++ ++void ++vchiq_release_message(VCHIQ_SERVICE_HANDLE_T handle, VCHIQ_HEADER_T *header) ++{ ++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle); ++ VCHIQ_SHARED_STATE_T *remote; ++ VCHIQ_STATE_T *state; ++ int slot_index; ++ ++ if (!service) ++ return; ++ ++ state = service->state; ++ remote = state->remote; ++ ++ slot_index = SLOT_INDEX_FROM_DATA(state, (void *)header); ++ ++ if ((slot_index >= remote->slot_first) && ++ (slot_index <= remote->slot_last)) { ++ int msgid = header->msgid; ++ if (msgid & VCHIQ_MSGID_CLAIMED) { ++ VCHIQ_SLOT_INFO_T *slot_info = ++ SLOT_INFO_FROM_INDEX(state, slot_index); ++ ++ release_slot(state, slot_info, header, service); ++ } ++ } else if (slot_index == remote->slot_sync) ++ release_message_sync(state, header); ++ ++ unlock_service(service); ++} ++ ++static void ++release_message_sync(VCHIQ_STATE_T *state, VCHIQ_HEADER_T *header) ++{ ++ header->msgid = VCHIQ_MSGID_PADDING; ++ wmb(); ++ remote_event_signal(&state->remote->sync_release); ++} ++ ++VCHIQ_STATUS_T ++vchiq_get_peer_version(VCHIQ_SERVICE_HANDLE_T handle, short *peer_version) ++{ ++ VCHIQ_STATUS_T status = VCHIQ_ERROR; ++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle); ++ ++ if (!service || ++ (vchiq_check_service(service) != VCHIQ_SUCCESS) || ++ !peer_version) ++ goto exit; ++ *peer_version = service->peer_version; ++ status = VCHIQ_SUCCESS; ++ ++exit: ++ if (service) ++ unlock_service(service); ++ return status; ++} ++ ++VCHIQ_STATUS_T ++vchiq_get_config(VCHIQ_INSTANCE_T instance, ++ int config_size, VCHIQ_CONFIG_T *pconfig) ++{ ++ VCHIQ_CONFIG_T config; ++ ++ (void)instance; ++ ++ config.max_msg_size = VCHIQ_MAX_MSG_SIZE; ++ config.bulk_threshold = VCHIQ_MAX_MSG_SIZE; ++ config.max_outstanding_bulks = VCHIQ_NUM_SERVICE_BULKS; ++ config.max_services = VCHIQ_MAX_SERVICES; ++ config.version = VCHIQ_VERSION; ++ config.version_min = VCHIQ_VERSION_MIN; ++ ++ if (config_size > sizeof(VCHIQ_CONFIG_T)) ++ return VCHIQ_ERROR; ++ ++ memcpy(pconfig, &config, ++ min(config_size, (int)(sizeof(VCHIQ_CONFIG_T)))); ++ ++ return VCHIQ_SUCCESS; ++} ++ ++VCHIQ_STATUS_T ++vchiq_set_service_option(VCHIQ_SERVICE_HANDLE_T handle, ++ VCHIQ_SERVICE_OPTION_T option, int value) ++{ ++ VCHIQ_SERVICE_T *service = find_service_by_handle(handle); ++ VCHIQ_STATUS_T status = VCHIQ_ERROR; ++ ++ if (service) { ++ switch (option) { ++ case VCHIQ_SERVICE_OPTION_AUTOCLOSE: ++ service->auto_close = value; ++ status = VCHIQ_SUCCESS; ++ break; ++ ++ case VCHIQ_SERVICE_OPTION_SLOT_QUOTA: { ++ VCHIQ_SERVICE_QUOTA_T *service_quota = ++ &service->state->service_quotas[ ++ service->localport]; ++ if (value == 0) ++ value = service->state->default_slot_quota; ++ if ((value >= service_quota->slot_use_count) && ++ (value < (unsigned short)~0)) { ++ service_quota->slot_quota = value; ++ if ((value >= service_quota->slot_use_count) && ++ (service_quota->message_quota >= ++ service_quota->message_use_count)) { ++ /* Signal the service that it may have ++ ** dropped below its quota */ ++ up(&service_quota->quota_event); ++ } ++ status = VCHIQ_SUCCESS; ++ } ++ } break; ++ ++ case VCHIQ_SERVICE_OPTION_MESSAGE_QUOTA: { ++ VCHIQ_SERVICE_QUOTA_T *service_quota = ++ &service->state->service_quotas[ ++ service->localport]; ++ if (value == 0) ++ value = service->state->default_message_quota; ++ if ((value >= service_quota->message_use_count) && ++ (value < (unsigned short)~0)) { ++ service_quota->message_quota = value; ++ if ((value >= ++ service_quota->message_use_count) && ++ (service_quota->slot_quota >= ++ service_quota->slot_use_count)) ++ /* Signal the service that it may have ++ ** dropped below its quota */ ++ up(&service_quota->quota_event); ++ status = VCHIQ_SUCCESS; ++ } ++ } break; ++ ++ case VCHIQ_SERVICE_OPTION_SYNCHRONOUS: ++ if ((service->srvstate == VCHIQ_SRVSTATE_HIDDEN) || ++ (service->srvstate == ++ VCHIQ_SRVSTATE_LISTENING)) { ++ service->sync = value; ++ status = VCHIQ_SUCCESS; ++ } ++ break; ++ ++ case VCHIQ_SERVICE_OPTION_TRACE: ++ service->trace = value; ++ status = VCHIQ_SUCCESS; ++ break; ++ ++ default: ++ break; ++ } ++ unlock_service(service); ++ } ++ ++ return status; ++} ++ ++void ++vchiq_dump_shared_state(void *dump_context, VCHIQ_STATE_T *state, ++ VCHIQ_SHARED_STATE_T *shared, const char *label) ++{ ++ static const char *const debug_names[] = { ++ "<entries>", ++ "SLOT_HANDLER_COUNT", ++ "SLOT_HANDLER_LINE", ++ "PARSE_LINE", ++ "PARSE_HEADER", ++ "PARSE_MSGID", ++ "AWAIT_COMPLETION_LINE", ++ "DEQUEUE_MESSAGE_LINE", ++ "SERVICE_CALLBACK_LINE", ++ "MSG_QUEUE_FULL_COUNT", ++ "COMPLETION_QUEUE_FULL_COUNT" ++ }; ++ int i; ++ ++ char buf[80]; ++ int len; ++ len = snprintf(buf, sizeof(buf), ++ " %s: slots %d-%d tx_pos=%x recycle=%x", ++ label, shared->slot_first, shared->slot_last, ++ shared->tx_pos, shared->slot_queue_recycle); ++ vchiq_dump(dump_context, buf, len + 1); ++ ++ len = snprintf(buf, sizeof(buf), ++ " Slots claimed:"); ++ vchiq_dump(dump_context, buf, len + 1); ++ ++ for (i = shared->slot_first; i <= shared->slot_last; i++) { ++ VCHIQ_SLOT_INFO_T slot_info = *SLOT_INFO_FROM_INDEX(state, i); ++ if (slot_info.use_count != slot_info.release_count) { ++ len = snprintf(buf, sizeof(buf), ++ " %d: %d/%d", i, slot_info.use_count, ++ slot_info.release_count); ++ vchiq_dump(dump_context, buf, len + 1); ++ } ++ } ++ ++ for (i = 1; i < shared->debug[DEBUG_ENTRIES]; i++) { ++ len = snprintf(buf, sizeof(buf), " DEBUG: %s = %d(%x)", ++ debug_names[i], shared->debug[i], shared->debug[i]); ++ vchiq_dump(dump_context, buf, len + 1); ++ } ++} ++ ++void ++vchiq_dump_state(void *dump_context, VCHIQ_STATE_T *state) ++{ ++ char buf[80]; ++ int len; ++ int i; ++ ++ len = snprintf(buf, sizeof(buf), "State %d: %s", state->id, ++ conn_state_names[state->conn_state]); ++ vchiq_dump(dump_context, buf, len + 1); ++ ++ len = snprintf(buf, sizeof(buf), ++ " tx_pos=%x(@%x), rx_pos=%x(@%x)", ++ state->local->tx_pos, ++ (uint32_t)state->tx_data + ++ (state->local_tx_pos & VCHIQ_SLOT_MASK), ++ state->rx_pos, ++ (uint32_t)state->rx_data + ++ (state->rx_pos & VCHIQ_SLOT_MASK)); ++ vchiq_dump(dump_context, buf, len + 1); ++ ++ len = snprintf(buf, sizeof(buf), ++ " Version: %d (min %d)", ++ VCHIQ_VERSION, VCHIQ_VERSION_MIN); ++ vchiq_dump(dump_context, buf, len + 1); ++ ++ if (VCHIQ_ENABLE_STATS) { ++ len = snprintf(buf, sizeof(buf), ++ " Stats: ctrl_tx_count=%d, ctrl_rx_count=%d, " ++ "error_count=%d", ++ state->stats.ctrl_tx_count, state->stats.ctrl_rx_count, ++ state->stats.error_count); ++ vchiq_dump(dump_context, buf, len + 1); ++ } ++ ++ len = snprintf(buf, sizeof(buf), ++ " Slots: %d available (%d data), %d recyclable, %d stalls " ++ "(%d data)", ++ ((state->slot_queue_available * VCHIQ_SLOT_SIZE) - ++ state->local_tx_pos) / VCHIQ_SLOT_SIZE, ++ state->data_quota - state->data_use_count, ++ state->local->slot_queue_recycle - state->slot_queue_available, ++ state->stats.slot_stalls, state->stats.data_stalls); ++ vchiq_dump(dump_context, buf, len + 1); ++ ++ vchiq_dump_platform_state(dump_context); ++ ++ vchiq_dump_shared_state(dump_context, state, state->local, "Local"); ++ vchiq_dump_shared_state(dump_context, state, state->remote, "Remote"); ++ ++ vchiq_dump_platform_instances(dump_context); ++ ++ for (i = 0; i < state->unused_service; i++) { ++ VCHIQ_SERVICE_T *service = find_service_by_port(state, i); ++ ++ if (service) { ++ vchiq_dump_service_state(dump_context, service); ++ unlock_service(service); ++ } ++ } ++} ++ ++void ++vchiq_dump_service_state(void *dump_context, VCHIQ_SERVICE_T *service) ++{ ++ char buf[80]; ++ int len; ++ ++ len = snprintf(buf, sizeof(buf), "Service %d: %s (ref %u)", ++ service->localport, srvstate_names[service->srvstate], ++ service->ref_count - 1); /*Don't include the lock just taken*/ ++ ++ if (service->srvstate != VCHIQ_SRVSTATE_FREE) { ++ char remoteport[30]; ++ VCHIQ_SERVICE_QUOTA_T *service_quota = ++ &service->state->service_quotas[service->localport]; ++ int fourcc = service->base.fourcc; ++ int tx_pending, rx_pending; ++ if (service->remoteport != VCHIQ_PORT_FREE) { ++ int len2 = snprintf(remoteport, sizeof(remoteport), ++ "%d", service->remoteport); ++ if (service->public_fourcc != VCHIQ_FOURCC_INVALID) ++ snprintf(remoteport + len2, ++ sizeof(remoteport) - len2, ++ " (client %x)", service->client_id); ++ } else ++ strcpy(remoteport, "n/a"); ++ ++ len += snprintf(buf + len, sizeof(buf) - len, ++ " '%c%c%c%c' remote %s (msg use %d/%d, slot use %d/%d)", ++ VCHIQ_FOURCC_AS_4CHARS(fourcc), ++ remoteport, ++ service_quota->message_use_count, ++ service_quota->message_quota, ++ service_quota->slot_use_count, ++ service_quota->slot_quota); ++ ++ vchiq_dump(dump_context, buf, len + 1); ++ ++ tx_pending = service->bulk_tx.local_insert - ++ service->bulk_tx.remote_insert; ++ ++ rx_pending = service->bulk_rx.local_insert - ++ service->bulk_rx.remote_insert; ++ ++ len = snprintf(buf, sizeof(buf), ++ " Bulk: tx_pending=%d (size %d)," ++ " rx_pending=%d (size %d)", ++ tx_pending, ++ tx_pending ? service->bulk_tx.bulks[ ++ BULK_INDEX(service->bulk_tx.remove)].size : 0, ++ rx_pending, ++ rx_pending ? service->bulk_rx.bulks[ ++ BULK_INDEX(service->bulk_rx.remove)].size : 0); ++ ++ if (VCHIQ_ENABLE_STATS) { ++ vchiq_dump(dump_context, buf, len + 1); ++ ++ len = snprintf(buf, sizeof(buf), ++ " Ctrl: tx_count=%d, tx_bytes=%llu, " ++ "rx_count=%d, rx_bytes=%llu", ++ service->stats.ctrl_tx_count, ++ service->stats.ctrl_tx_bytes, ++ service->stats.ctrl_rx_count, ++ service->stats.ctrl_rx_bytes); ++ vchiq_dump(dump_context, buf, len + 1); ++ ++ len = snprintf(buf, sizeof(buf), ++ " Bulk: tx_count=%d, tx_bytes=%llu, " ++ "rx_count=%d, rx_bytes=%llu", ++ service->stats.bulk_tx_count, ++ service->stats.bulk_tx_bytes, ++ service->stats.bulk_rx_count, ++ service->stats.bulk_rx_bytes); ++ vchiq_dump(dump_context, buf, len + 1); ++ ++ len = snprintf(buf, sizeof(buf), ++ " %d quota stalls, %d slot stalls, " ++ "%d bulk stalls, %d aborted, %d errors", ++ service->stats.quota_stalls, ++ service->stats.slot_stalls, ++ service->stats.bulk_stalls, ++ service->stats.bulk_aborted_count, ++ service->stats.error_count); ++ } ++ } ++ ++ vchiq_dump(dump_context, buf, len + 1); ++ ++ if (service->srvstate != VCHIQ_SRVSTATE_FREE) ++ vchiq_dump_platform_service_state(dump_context, service); ++} ++ ++ ++void ++vchiq_loud_error_header(void) ++{ ++ vchiq_log_error(vchiq_core_log_level, ++ "============================================================" ++ "================"); ++ vchiq_log_error(vchiq_core_log_level, ++ "============================================================" ++ "================"); ++ vchiq_log_error(vchiq_core_log_level, "====="); ++} ++ ++void ++vchiq_loud_error_footer(void) ++{ ++ vchiq_log_error(vchiq_core_log_level, "====="); ++ vchiq_log_error(vchiq_core_log_level, ++ "============================================================" ++ "================"); ++ vchiq_log_error(vchiq_core_log_level, ++ "============================================================" ++ "================"); ++} ++ ++ ++VCHIQ_STATUS_T vchiq_send_remote_use(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_STATUS_T status = VCHIQ_RETRY; ++ if (state->conn_state != VCHIQ_CONNSTATE_DISCONNECTED) ++ status = queue_message(state, NULL, ++ VCHIQ_MAKE_MSG(VCHIQ_MSG_REMOTE_USE, 0, 0), ++ NULL, 0, 0, 0); ++ return status; ++} ++ ++VCHIQ_STATUS_T vchiq_send_remote_release(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_STATUS_T status = VCHIQ_RETRY; ++ if (state->conn_state != VCHIQ_CONNSTATE_DISCONNECTED) ++ status = queue_message(state, NULL, ++ VCHIQ_MAKE_MSG(VCHIQ_MSG_REMOTE_RELEASE, 0, 0), ++ NULL, 0, 0, 0); ++ return status; ++} ++ ++VCHIQ_STATUS_T vchiq_send_remote_use_active(VCHIQ_STATE_T *state) ++{ ++ VCHIQ_STATUS_T status = VCHIQ_RETRY; ++ if (state->conn_state != VCHIQ_CONNSTATE_DISCONNECTED) ++ status = queue_message(state, NULL, ++ VCHIQ_MAKE_MSG(VCHIQ_MSG_REMOTE_USE_ACTIVE, 0, 0), ++ NULL, 0, 0, 0); ++ return status; ++} ++ ++void vchiq_log_dump_mem(const char *label, uint32_t addr, const void *voidMem, ++ size_t numBytes) ++{ ++ const uint8_t *mem = (const uint8_t *)voidMem; ++ size_t offset; ++ char lineBuf[100]; ++ char *s; ++ ++ while (numBytes > 0) { ++ s = lineBuf; ++ ++ for (offset = 0; offset < 16; offset++) { ++ if (offset < numBytes) ++ s += snprintf(s, 4, "%02x ", mem[offset]); ++ else ++ s += snprintf(s, 4, " "); ++ } ++ ++ for (offset = 0; offset < 16; offset++) { ++ if (offset < numBytes) { ++ uint8_t ch = mem[offset]; ++ ++ if ((ch < ' ') || (ch > '~')) ++ ch = '.'; ++ *s++ = (char)ch; ++ } ++ } ++ *s++ = '\0'; ++ ++ if ((label != NULL) && (*label != '\0')) ++ vchiq_log_trace(VCHIQ_LOG_TRACE, ++ "%s: %08x: %s", label, addr, lineBuf); ++ else ++ vchiq_log_trace(VCHIQ_LOG_TRACE, ++ "%08x: %s", addr, lineBuf); ++ ++ addr += 16; ++ mem += 16; ++ if (numBytes > 16) ++ numBytes -= 16; ++ else ++ numBytes = 0; ++ } ++} +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_core.h +@@ -0,0 +1,712 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#ifndef VCHIQ_CORE_H ++#define VCHIQ_CORE_H ++ ++#include <linux/mutex.h> ++#include <linux/semaphore.h> ++#include <linux/kthread.h> ++ ++#include "vchiq_cfg.h" ++ ++#include "vchiq.h" ++ ++/* Run time control of log level, based on KERN_XXX level. */ ++#define VCHIQ_LOG_DEFAULT 4 ++#define VCHIQ_LOG_ERROR 3 ++#define VCHIQ_LOG_WARNING 4 ++#define VCHIQ_LOG_INFO 6 ++#define VCHIQ_LOG_TRACE 7 ++ ++#define VCHIQ_LOG_PREFIX KERN_INFO "vchiq: " ++ ++#ifndef vchiq_log_error ++#define vchiq_log_error(cat, fmt, ...) \ ++ do { if (cat >= VCHIQ_LOG_ERROR) \ ++ printk(VCHIQ_LOG_PREFIX fmt "\n", ##__VA_ARGS__); } while (0) ++#endif ++#ifndef vchiq_log_warning ++#define vchiq_log_warning(cat, fmt, ...) \ ++ do { if (cat >= VCHIQ_LOG_WARNING) \ ++ printk(VCHIQ_LOG_PREFIX fmt "\n", ##__VA_ARGS__); } while (0) ++#endif ++#ifndef vchiq_log_info ++#define vchiq_log_info(cat, fmt, ...) \ ++ do { if (cat >= VCHIQ_LOG_INFO) \ ++ printk(VCHIQ_LOG_PREFIX fmt "\n", ##__VA_ARGS__); } while (0) ++#endif ++#ifndef vchiq_log_trace ++#define vchiq_log_trace(cat, fmt, ...) \ ++ do { if (cat >= VCHIQ_LOG_TRACE) \ ++ printk(VCHIQ_LOG_PREFIX fmt "\n", ##__VA_ARGS__); } while (0) ++#endif ++ ++#define vchiq_loud_error(...) \ ++ vchiq_log_error(vchiq_core_log_level, "===== " __VA_ARGS__) ++ ++#ifndef vchiq_static_assert ++#define vchiq_static_assert(cond) __attribute__((unused)) \ ++ extern int vchiq_static_assert[(cond) ? 1 : -1] ++#endif ++ ++#define IS_POW2(x) (x && ((x & (x - 1)) == 0)) ++ ++/* Ensure that the slot size and maximum number of slots are powers of 2 */ ++vchiq_static_assert(IS_POW2(VCHIQ_SLOT_SIZE)); ++vchiq_static_assert(IS_POW2(VCHIQ_MAX_SLOTS)); ++vchiq_static_assert(IS_POW2(VCHIQ_MAX_SLOTS_PER_SIDE)); ++ ++#define VCHIQ_SLOT_MASK (VCHIQ_SLOT_SIZE - 1) ++#define VCHIQ_SLOT_QUEUE_MASK (VCHIQ_MAX_SLOTS_PER_SIDE - 1) ++#define VCHIQ_SLOT_ZERO_SLOTS ((sizeof(VCHIQ_SLOT_ZERO_T) + \ ++ VCHIQ_SLOT_SIZE - 1) / VCHIQ_SLOT_SIZE) ++ ++#define VCHIQ_MSG_PADDING 0 /* - */ ++#define VCHIQ_MSG_CONNECT 1 /* - */ ++#define VCHIQ_MSG_OPEN 2 /* + (srcport, -), fourcc, client_id */ ++#define VCHIQ_MSG_OPENACK 3 /* + (srcport, dstport) */ ++#define VCHIQ_MSG_CLOSE 4 /* + (srcport, dstport) */ ++#define VCHIQ_MSG_DATA 5 /* + (srcport, dstport) */ ++#define VCHIQ_MSG_BULK_RX 6 /* + (srcport, dstport), data, size */ ++#define VCHIQ_MSG_BULK_TX 7 /* + (srcport, dstport), data, size */ ++#define VCHIQ_MSG_BULK_RX_DONE 8 /* + (srcport, dstport), actual */ ++#define VCHIQ_MSG_BULK_TX_DONE 9 /* + (srcport, dstport), actual */ ++#define VCHIQ_MSG_PAUSE 10 /* - */ ++#define VCHIQ_MSG_RESUME 11 /* - */ ++#define VCHIQ_MSG_REMOTE_USE 12 /* - */ ++#define VCHIQ_MSG_REMOTE_RELEASE 13 /* - */ ++#define VCHIQ_MSG_REMOTE_USE_ACTIVE 14 /* - */ ++ ++#define VCHIQ_PORT_MAX (VCHIQ_MAX_SERVICES - 1) ++#define VCHIQ_PORT_FREE 0x1000 ++#define VCHIQ_PORT_IS_VALID(port) (port < VCHIQ_PORT_FREE) ++#define VCHIQ_MAKE_MSG(type, srcport, dstport) \ ++ ((type<<24) | (srcport<<12) | (dstport<<0)) ++#define VCHIQ_MSG_TYPE(msgid) ((unsigned int)msgid >> 24) ++#define VCHIQ_MSG_SRCPORT(msgid) \ ++ (unsigned short)(((unsigned int)msgid >> 12) & 0xfff) ++#define VCHIQ_MSG_DSTPORT(msgid) \ ++ ((unsigned short)msgid & 0xfff) ++ ++#define VCHIQ_FOURCC_AS_4CHARS(fourcc) \ ++ ((fourcc) >> 24) & 0xff, \ ++ ((fourcc) >> 16) & 0xff, \ ++ ((fourcc) >> 8) & 0xff, \ ++ (fourcc) & 0xff ++ ++/* Ensure the fields are wide enough */ ++vchiq_static_assert(VCHIQ_MSG_SRCPORT(VCHIQ_MAKE_MSG(0, 0, VCHIQ_PORT_MAX)) ++ == 0); ++vchiq_static_assert(VCHIQ_MSG_TYPE(VCHIQ_MAKE_MSG(0, VCHIQ_PORT_MAX, 0)) == 0); ++vchiq_static_assert((unsigned int)VCHIQ_PORT_MAX < ++ (unsigned int)VCHIQ_PORT_FREE); ++ ++#define VCHIQ_MSGID_PADDING VCHIQ_MAKE_MSG(VCHIQ_MSG_PADDING, 0, 0) ++#define VCHIQ_MSGID_CLAIMED 0x40000000 ++ ++#define VCHIQ_FOURCC_INVALID 0x00000000 ++#define VCHIQ_FOURCC_IS_LEGAL(fourcc) (fourcc != VCHIQ_FOURCC_INVALID) ++ ++#define VCHIQ_BULK_ACTUAL_ABORTED -1 ++ ++typedef uint32_t BITSET_T; ++ ++vchiq_static_assert((sizeof(BITSET_T) * 8) == 32); ++ ++#define BITSET_SIZE(b) ((b + 31) >> 5) ++#define BITSET_WORD(b) (b >> 5) ++#define BITSET_BIT(b) (1 << (b & 31)) ++#define BITSET_ZERO(bs) memset(bs, 0, sizeof(bs)) ++#define BITSET_IS_SET(bs, b) (bs[BITSET_WORD(b)] & BITSET_BIT(b)) ++#define BITSET_SET(bs, b) (bs[BITSET_WORD(b)] |= BITSET_BIT(b)) ++#define BITSET_CLR(bs, b) (bs[BITSET_WORD(b)] &= ~BITSET_BIT(b)) ++ ++#if VCHIQ_ENABLE_STATS ++#define VCHIQ_STATS_INC(state, stat) (state->stats. stat++) ++#define VCHIQ_SERVICE_STATS_INC(service, stat) (service->stats. stat++) ++#define VCHIQ_SERVICE_STATS_ADD(service, stat, addend) \ ++ (service->stats. stat += addend) ++#else ++#define VCHIQ_STATS_INC(state, stat) ((void)0) ++#define VCHIQ_SERVICE_STATS_INC(service, stat) ((void)0) ++#define VCHIQ_SERVICE_STATS_ADD(service, stat, addend) ((void)0) ++#endif ++ ++enum { ++ DEBUG_ENTRIES, ++#if VCHIQ_ENABLE_DEBUG ++ DEBUG_SLOT_HANDLER_COUNT, ++ DEBUG_SLOT_HANDLER_LINE, ++ DEBUG_PARSE_LINE, ++ DEBUG_PARSE_HEADER, ++ DEBUG_PARSE_MSGID, ++ DEBUG_AWAIT_COMPLETION_LINE, ++ DEBUG_DEQUEUE_MESSAGE_LINE, ++ DEBUG_SERVICE_CALLBACK_LINE, ++ DEBUG_MSG_QUEUE_FULL_COUNT, ++ DEBUG_COMPLETION_QUEUE_FULL_COUNT, ++#endif ++ DEBUG_MAX ++}; ++ ++#if VCHIQ_ENABLE_DEBUG ++ ++#define DEBUG_INITIALISE(local) int *debug_ptr = (local)->debug; ++#define DEBUG_TRACE(d) \ ++ do { debug_ptr[DEBUG_ ## d] = __LINE__; dsb(); } while (0) ++#define DEBUG_VALUE(d, v) \ ++ do { debug_ptr[DEBUG_ ## d] = (v); dsb(); } while (0) ++#define DEBUG_COUNT(d) \ ++ do { debug_ptr[DEBUG_ ## d]++; dsb(); } while (0) ++ ++#else /* VCHIQ_ENABLE_DEBUG */ ++ ++#define DEBUG_INITIALISE(local) ++#define DEBUG_TRACE(d) ++#define DEBUG_VALUE(d, v) ++#define DEBUG_COUNT(d) ++ ++#endif /* VCHIQ_ENABLE_DEBUG */ ++ ++typedef enum { ++ VCHIQ_CONNSTATE_DISCONNECTED, ++ VCHIQ_CONNSTATE_CONNECTING, ++ VCHIQ_CONNSTATE_CONNECTED, ++ VCHIQ_CONNSTATE_PAUSING, ++ VCHIQ_CONNSTATE_PAUSE_SENT, ++ VCHIQ_CONNSTATE_PAUSED, ++ VCHIQ_CONNSTATE_RESUMING, ++ VCHIQ_CONNSTATE_PAUSE_TIMEOUT, ++ VCHIQ_CONNSTATE_RESUME_TIMEOUT ++} VCHIQ_CONNSTATE_T; ++ ++enum { ++ VCHIQ_SRVSTATE_FREE, ++ VCHIQ_SRVSTATE_HIDDEN, ++ VCHIQ_SRVSTATE_LISTENING, ++ VCHIQ_SRVSTATE_OPENING, ++ VCHIQ_SRVSTATE_OPEN, ++ VCHIQ_SRVSTATE_OPENSYNC, ++ VCHIQ_SRVSTATE_CLOSESENT, ++ VCHIQ_SRVSTATE_CLOSERECVD, ++ VCHIQ_SRVSTATE_CLOSEWAIT, ++ VCHIQ_SRVSTATE_CLOSED ++}; ++ ++enum { ++ VCHIQ_POLL_TERMINATE, ++ VCHIQ_POLL_REMOVE, ++ VCHIQ_POLL_TXNOTIFY, ++ VCHIQ_POLL_RXNOTIFY, ++ VCHIQ_POLL_COUNT ++}; ++ ++typedef enum { ++ VCHIQ_BULK_TRANSMIT, ++ VCHIQ_BULK_RECEIVE ++} VCHIQ_BULK_DIR_T; ++ ++typedef void (*VCHIQ_USERDATA_TERM_T)(void *userdata); ++ ++typedef struct vchiq_bulk_struct { ++ short mode; ++ short dir; ++ void *userdata; ++ VCHI_MEM_HANDLE_T handle; ++ void *data; ++ int size; ++ void *remote_data; ++ int remote_size; ++ int actual; ++} VCHIQ_BULK_T; ++ ++typedef struct vchiq_bulk_queue_struct { ++ int local_insert; /* Where to insert the next local bulk */ ++ int remote_insert; /* Where to insert the next remote bulk (master) */ ++ int process; /* Bulk to transfer next */ ++ int remote_notify; /* Bulk to notify the remote client of next (mstr) */ ++ int remove; /* Bulk to notify the local client of, and remove, ++ ** next */ ++ VCHIQ_BULK_T bulks[VCHIQ_NUM_SERVICE_BULKS]; ++} VCHIQ_BULK_QUEUE_T; ++ ++typedef struct remote_event_struct { ++ int armed; ++ int fired; ++ struct semaphore *event; ++} REMOTE_EVENT_T; ++ ++typedef struct opaque_platform_state_t *VCHIQ_PLATFORM_STATE_T; ++ ++typedef struct vchiq_state_struct VCHIQ_STATE_T; ++ ++typedef struct vchiq_slot_struct { ++ char data[VCHIQ_SLOT_SIZE]; ++} VCHIQ_SLOT_T; ++ ++typedef struct vchiq_slot_info_struct { ++ /* Use two counters rather than one to avoid the need for a mutex. */ ++ short use_count; ++ short release_count; ++} VCHIQ_SLOT_INFO_T; ++ ++typedef struct vchiq_service_struct { ++ VCHIQ_SERVICE_BASE_T base; ++ VCHIQ_SERVICE_HANDLE_T handle; ++ unsigned int ref_count; ++ int srvstate; ++ VCHIQ_USERDATA_TERM_T userdata_term; ++ unsigned int localport; ++ unsigned int remoteport; ++ int public_fourcc; ++ int client_id; ++ char auto_close; ++ char sync; ++ char closing; ++ char trace; ++ atomic_t poll_flags; ++ short version; ++ short version_min; ++ short peer_version; ++ ++ VCHIQ_STATE_T *state; ++ VCHIQ_INSTANCE_T instance; ++ ++ int service_use_count; ++ ++ VCHIQ_BULK_QUEUE_T bulk_tx; ++ VCHIQ_BULK_QUEUE_T bulk_rx; ++ ++ struct semaphore remove_event; ++ struct semaphore bulk_remove_event; ++ struct mutex bulk_mutex; ++ ++ struct service_stats_struct { ++ int quota_stalls; ++ int slot_stalls; ++ int bulk_stalls; ++ int error_count; ++ int ctrl_tx_count; ++ int ctrl_rx_count; ++ int bulk_tx_count; ++ int bulk_rx_count; ++ int bulk_aborted_count; ++ uint64_t ctrl_tx_bytes; ++ uint64_t ctrl_rx_bytes; ++ uint64_t bulk_tx_bytes; ++ uint64_t bulk_rx_bytes; ++ } stats; ++} VCHIQ_SERVICE_T; ++ ++/* The quota information is outside VCHIQ_SERVICE_T so that it can be ++ statically allocated, since for accounting reasons a service's slot ++ usage is carried over between users of the same port number. ++ */ ++typedef struct vchiq_service_quota_struct { ++ unsigned short slot_quota; ++ unsigned short slot_use_count; ++ unsigned short message_quota; ++ unsigned short message_use_count; ++ struct semaphore quota_event; ++ int previous_tx_index; ++} VCHIQ_SERVICE_QUOTA_T; ++ ++typedef struct vchiq_shared_state_struct { ++ ++ /* A non-zero value here indicates that the content is valid. */ ++ int initialised; ++ ++ /* The first and last (inclusive) slots allocated to the owner. */ ++ int slot_first; ++ int slot_last; ++ ++ /* The slot allocated to synchronous messages from the owner. */ ++ int slot_sync; ++ ++ /* Signalling this event indicates that owner's slot handler thread ++ ** should run. */ ++ REMOTE_EVENT_T trigger; ++ ++ /* Indicates the byte position within the stream where the next message ++ ** will be written. The least significant bits are an index into the ++ ** slot. The next bits are the index of the slot in slot_queue. */ ++ int tx_pos; ++ ++ /* This event should be signalled when a slot is recycled. */ ++ REMOTE_EVENT_T recycle; ++ ++ /* The slot_queue index where the next recycled slot will be written. */ ++ int slot_queue_recycle; ++ ++ /* This event should be signalled when a synchronous message is sent. */ ++ REMOTE_EVENT_T sync_trigger; ++ ++ /* This event should be signalled when a synchronous message has been ++ ** released. */ ++ REMOTE_EVENT_T sync_release; ++ ++ /* A circular buffer of slot indexes. */ ++ int slot_queue[VCHIQ_MAX_SLOTS_PER_SIDE]; ++ ++ /* Debugging state */ ++ int debug[DEBUG_MAX]; ++} VCHIQ_SHARED_STATE_T; ++ ++typedef struct vchiq_slot_zero_struct { ++ int magic; ++ short version; ++ short version_min; ++ int slot_zero_size; ++ int slot_size; ++ int max_slots; ++ int max_slots_per_side; ++ int platform_data[2]; ++ VCHIQ_SHARED_STATE_T master; ++ VCHIQ_SHARED_STATE_T slave; ++ VCHIQ_SLOT_INFO_T slots[VCHIQ_MAX_SLOTS]; ++} VCHIQ_SLOT_ZERO_T; ++ ++struct vchiq_state_struct { ++ int id; ++ int initialised; ++ VCHIQ_CONNSTATE_T conn_state; ++ int is_master; ++ short version_common; ++ ++ VCHIQ_SHARED_STATE_T *local; ++ VCHIQ_SHARED_STATE_T *remote; ++ VCHIQ_SLOT_T *slot_data; ++ ++ unsigned short default_slot_quota; ++ unsigned short default_message_quota; ++ ++ /* Event indicating connect message received */ ++ struct semaphore connect; ++ ++ /* Mutex protecting services */ ++ struct mutex mutex; ++ VCHIQ_INSTANCE_T *instance; ++ ++ /* Processes incoming messages */ ++ struct task_struct *slot_handler_thread; ++ ++ /* Processes recycled slots */ ++ struct task_struct *recycle_thread; ++ ++ /* Processes synchronous messages */ ++ struct task_struct *sync_thread; ++ ++ /* Local implementation of the trigger remote event */ ++ struct semaphore trigger_event; ++ ++ /* Local implementation of the recycle remote event */ ++ struct semaphore recycle_event; ++ ++ /* Local implementation of the sync trigger remote event */ ++ struct semaphore sync_trigger_event; ++ ++ /* Local implementation of the sync release remote event */ ++ struct semaphore sync_release_event; ++ ++ char *tx_data; ++ char *rx_data; ++ VCHIQ_SLOT_INFO_T *rx_info; ++ ++ struct mutex slot_mutex; ++ ++ struct mutex recycle_mutex; ++ ++ struct mutex sync_mutex; ++ ++ struct mutex bulk_transfer_mutex; ++ ++ /* Indicates the byte position within the stream from where the next ++ ** message will be read. The least significant bits are an index into ++ ** the slot.The next bits are the index of the slot in ++ ** remote->slot_queue. */ ++ int rx_pos; ++ ++ /* A cached copy of local->tx_pos. Only write to local->tx_pos, and read ++ from remote->tx_pos. */ ++ int local_tx_pos; ++ ++ /* The slot_queue index of the slot to become available next. */ ++ int slot_queue_available; ++ ++ /* A flag to indicate if any poll has been requested */ ++ int poll_needed; ++ ++ /* Ths index of the previous slot used for data messages. */ ++ int previous_data_index; ++ ++ /* The number of slots occupied by data messages. */ ++ unsigned short data_use_count; ++ ++ /* The maximum number of slots to be occupied by data messages. */ ++ unsigned short data_quota; ++ ++ /* An array of bit sets indicating which services must be polled. */ ++ atomic_t poll_services[BITSET_SIZE(VCHIQ_MAX_SERVICES)]; ++ ++ /* The number of the first unused service */ ++ int unused_service; ++ ++ /* Signalled when a free slot becomes available. */ ++ struct semaphore slot_available_event; ++ ++ struct semaphore slot_remove_event; ++ ++ /* Signalled when a free data slot becomes available. */ ++ struct semaphore data_quota_event; ++ ++ /* Incremented when there are bulk transfers which cannot be processed ++ * whilst paused and must be processed on resume */ ++ int deferred_bulks; ++ ++ struct state_stats_struct { ++ int slot_stalls; ++ int data_stalls; ++ int ctrl_tx_count; ++ int ctrl_rx_count; ++ int error_count; ++ } stats; ++ ++ VCHIQ_SERVICE_T * services[VCHIQ_MAX_SERVICES]; ++ VCHIQ_SERVICE_QUOTA_T service_quotas[VCHIQ_MAX_SERVICES]; ++ VCHIQ_SLOT_INFO_T slot_info[VCHIQ_MAX_SLOTS]; ++ ++ VCHIQ_PLATFORM_STATE_T platform_state; ++}; ++ ++struct bulk_waiter { ++ VCHIQ_BULK_T *bulk; ++ struct semaphore event; ++ int actual; ++}; ++ ++extern spinlock_t bulk_waiter_spinlock; ++ ++extern int vchiq_core_log_level; ++extern int vchiq_core_msg_log_level; ++extern int vchiq_sync_log_level; ++ ++extern VCHIQ_STATE_T *vchiq_states[VCHIQ_MAX_STATES]; ++ ++extern const char * ++get_conn_state_name(VCHIQ_CONNSTATE_T conn_state); ++ ++extern VCHIQ_SLOT_ZERO_T * ++vchiq_init_slots(void *mem_base, int mem_size); ++ ++extern VCHIQ_STATUS_T ++vchiq_init_state(VCHIQ_STATE_T *state, VCHIQ_SLOT_ZERO_T *slot_zero, ++ int is_master); ++ ++extern VCHIQ_STATUS_T ++vchiq_connect_internal(VCHIQ_STATE_T *state, VCHIQ_INSTANCE_T instance); ++ ++extern VCHIQ_SERVICE_T * ++vchiq_add_service_internal(VCHIQ_STATE_T *state, ++ const VCHIQ_SERVICE_PARAMS_T *params, int srvstate, ++ VCHIQ_INSTANCE_T instance, VCHIQ_USERDATA_TERM_T userdata_term); ++ ++extern VCHIQ_STATUS_T ++vchiq_open_service_internal(VCHIQ_SERVICE_T *service, int client_id); ++ ++extern VCHIQ_STATUS_T ++vchiq_close_service_internal(VCHIQ_SERVICE_T *service, int close_recvd); ++ ++extern void ++vchiq_terminate_service_internal(VCHIQ_SERVICE_T *service); ++ ++extern void ++vchiq_free_service_internal(VCHIQ_SERVICE_T *service); ++ ++extern VCHIQ_STATUS_T ++vchiq_shutdown_internal(VCHIQ_STATE_T *state, VCHIQ_INSTANCE_T instance); ++ ++extern VCHIQ_STATUS_T ++vchiq_pause_internal(VCHIQ_STATE_T *state); ++ ++extern VCHIQ_STATUS_T ++vchiq_resume_internal(VCHIQ_STATE_T *state); ++ ++extern void ++remote_event_pollall(VCHIQ_STATE_T *state); ++ ++extern VCHIQ_STATUS_T ++vchiq_bulk_transfer(VCHIQ_SERVICE_HANDLE_T handle, ++ VCHI_MEM_HANDLE_T memhandle, void *offset, int size, void *userdata, ++ VCHIQ_BULK_MODE_T mode, VCHIQ_BULK_DIR_T dir); ++ ++extern void ++vchiq_dump_state(void *dump_context, VCHIQ_STATE_T *state); ++ ++extern void ++vchiq_dump_service_state(void *dump_context, VCHIQ_SERVICE_T *service); ++ ++extern void ++vchiq_loud_error_header(void); ++ ++extern void ++vchiq_loud_error_footer(void); ++ ++extern void ++request_poll(VCHIQ_STATE_T *state, VCHIQ_SERVICE_T *service, int poll_type); ++ ++static inline VCHIQ_SERVICE_T * ++handle_to_service(VCHIQ_SERVICE_HANDLE_T handle) ++{ ++ VCHIQ_STATE_T *state = vchiq_states[(handle / VCHIQ_MAX_SERVICES) & ++ (VCHIQ_MAX_STATES - 1)]; ++ if (!state) ++ return NULL; ++ ++ return state->services[handle & (VCHIQ_MAX_SERVICES - 1)]; ++} ++ ++extern VCHIQ_SERVICE_T * ++find_service_by_handle(VCHIQ_SERVICE_HANDLE_T handle); ++ ++extern VCHIQ_SERVICE_T * ++find_service_by_port(VCHIQ_STATE_T *state, int localport); ++ ++extern VCHIQ_SERVICE_T * ++find_service_for_instance(VCHIQ_INSTANCE_T instance, ++ VCHIQ_SERVICE_HANDLE_T handle); ++ ++extern VCHIQ_SERVICE_T * ++find_closed_service_for_instance(VCHIQ_INSTANCE_T instance, ++ VCHIQ_SERVICE_HANDLE_T handle); ++ ++extern VCHIQ_SERVICE_T * ++next_service_by_instance(VCHIQ_STATE_T *state, VCHIQ_INSTANCE_T instance, ++ int *pidx); ++ ++extern void ++lock_service(VCHIQ_SERVICE_T *service); ++ ++extern void ++unlock_service(VCHIQ_SERVICE_T *service); ++ ++/* The following functions are called from vchiq_core, and external ++** implementations must be provided. */ ++ ++extern VCHIQ_STATUS_T ++vchiq_prepare_bulk_data(VCHIQ_BULK_T *bulk, ++ VCHI_MEM_HANDLE_T memhandle, void *offset, int size, int dir); ++ ++extern void ++vchiq_transfer_bulk(VCHIQ_BULK_T *bulk); ++ ++extern void ++vchiq_complete_bulk(VCHIQ_BULK_T *bulk); ++ ++extern VCHIQ_STATUS_T ++vchiq_copy_from_user(void *dst, const void *src, int size); ++ ++extern void ++remote_event_signal(REMOTE_EVENT_T *event); ++ ++void ++vchiq_platform_check_suspend(VCHIQ_STATE_T *state); ++ ++extern void ++vchiq_platform_paused(VCHIQ_STATE_T *state); ++ ++extern VCHIQ_STATUS_T ++vchiq_platform_resume(VCHIQ_STATE_T *state); ++ ++extern void ++vchiq_platform_resumed(VCHIQ_STATE_T *state); ++ ++extern void ++vchiq_dump(void *dump_context, const char *str, int len); ++ ++extern void ++vchiq_dump_platform_state(void *dump_context); ++ ++extern void ++vchiq_dump_platform_instances(void *dump_context); ++ ++extern void ++vchiq_dump_platform_service_state(void *dump_context, ++ VCHIQ_SERVICE_T *service); ++ ++extern VCHIQ_STATUS_T ++vchiq_use_service_internal(VCHIQ_SERVICE_T *service); ++ ++extern VCHIQ_STATUS_T ++vchiq_release_service_internal(VCHIQ_SERVICE_T *service); ++ ++extern void ++vchiq_on_remote_use(VCHIQ_STATE_T *state); ++ ++extern void ++vchiq_on_remote_release(VCHIQ_STATE_T *state); ++ ++extern VCHIQ_STATUS_T ++vchiq_platform_init_state(VCHIQ_STATE_T *state); ++ ++extern VCHIQ_STATUS_T ++vchiq_check_service(VCHIQ_SERVICE_T *service); ++ ++extern void ++vchiq_on_remote_use_active(VCHIQ_STATE_T *state); ++ ++extern VCHIQ_STATUS_T ++vchiq_send_remote_use(VCHIQ_STATE_T *state); ++ ++extern VCHIQ_STATUS_T ++vchiq_send_remote_release(VCHIQ_STATE_T *state); ++ ++extern VCHIQ_STATUS_T ++vchiq_send_remote_use_active(VCHIQ_STATE_T *state); ++ ++extern void ++vchiq_platform_conn_state_changed(VCHIQ_STATE_T *state, ++ VCHIQ_CONNSTATE_T oldstate, VCHIQ_CONNSTATE_T newstate); ++ ++extern void ++vchiq_platform_handle_timeout(VCHIQ_STATE_T *state); ++ ++extern void ++vchiq_set_conn_state(VCHIQ_STATE_T *state, VCHIQ_CONNSTATE_T newstate); ++ ++ ++extern void ++vchiq_log_dump_mem(const char *label, uint32_t addr, const void *voidMem, ++ size_t numBytes); ++ ++#endif +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_debugfs.c +@@ -0,0 +1,383 @@ ++/** ++ * Copyright (c) 2014 Raspberry Pi (Trading) Ltd. All rights reserved. ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++ ++#include <linux/debugfs.h> ++#include "vchiq_core.h" ++#include "vchiq_arm.h" ++#include "vchiq_debugfs.h" ++ ++#ifdef CONFIG_DEBUG_FS ++ ++/**************************************************************************** ++* ++* log category entries ++* ++***************************************************************************/ ++#define DEBUGFS_WRITE_BUF_SIZE 256 ++ ++#define VCHIQ_LOG_ERROR_STR "error" ++#define VCHIQ_LOG_WARNING_STR "warning" ++#define VCHIQ_LOG_INFO_STR "info" ++#define VCHIQ_LOG_TRACE_STR "trace" ++ ++ ++/* Top-level debug info */ ++struct vchiq_debugfs_info { ++ /* Global 'vchiq' debugfs entry used by all instances */ ++ struct dentry *vchiq_cfg_dir; ++ ++ /* one entry per client process */ ++ struct dentry *clients; ++ ++ /* log categories */ ++ struct dentry *log_categories; ++}; ++ ++static struct vchiq_debugfs_info debugfs_info; ++ ++/* Log category debugfs entries */ ++struct vchiq_debugfs_log_entry { ++ const char *name; ++ int *plevel; ++ struct dentry *dir; ++}; ++ ++static struct vchiq_debugfs_log_entry vchiq_debugfs_log_entries[] = { ++ { "core", &vchiq_core_log_level }, ++ { "msg", &vchiq_core_msg_log_level }, ++ { "sync", &vchiq_sync_log_level }, ++ { "susp", &vchiq_susp_log_level }, ++ { "arm", &vchiq_arm_log_level }, ++}; ++static int n_log_entries = ++ sizeof(vchiq_debugfs_log_entries)/sizeof(vchiq_debugfs_log_entries[0]); ++ ++ ++static struct dentry *vchiq_clients_top(void); ++static struct dentry *vchiq_debugfs_top(void); ++ ++static int debugfs_log_show(struct seq_file *f, void *offset) ++{ ++ int *levp = f->private; ++ char *log_value = NULL; ++ ++ switch (*levp) { ++ case VCHIQ_LOG_ERROR: ++ log_value = VCHIQ_LOG_ERROR_STR; ++ break; ++ case VCHIQ_LOG_WARNING: ++ log_value = VCHIQ_LOG_WARNING_STR; ++ break; ++ case VCHIQ_LOG_INFO: ++ log_value = VCHIQ_LOG_INFO_STR; ++ break; ++ case VCHIQ_LOG_TRACE: ++ log_value = VCHIQ_LOG_TRACE_STR; ++ break; ++ default: ++ break; ++ } ++ ++ seq_printf(f, "%s\n", log_value ? log_value : "(null)"); ++ ++ return 0; ++} ++ ++static int debugfs_log_open(struct inode *inode, struct file *file) ++{ ++ return single_open(file, debugfs_log_show, inode->i_private); ++} ++ ++static int debugfs_log_write(struct file *file, ++ const char __user *buffer, ++ size_t count, loff_t *ppos) ++{ ++ struct seq_file *f = (struct seq_file *)file->private_data; ++ int *levp = f->private; ++ char kbuf[DEBUGFS_WRITE_BUF_SIZE + 1]; ++ ++ memset(kbuf, 0, DEBUGFS_WRITE_BUF_SIZE + 1); ++ if (count >= DEBUGFS_WRITE_BUF_SIZE) ++ count = DEBUGFS_WRITE_BUF_SIZE; ++ ++ if (copy_from_user(kbuf, buffer, count) != 0) ++ return -EFAULT; ++ kbuf[count - 1] = 0; ++ ++ if (strncmp("error", kbuf, strlen("error")) == 0) ++ *levp = VCHIQ_LOG_ERROR; ++ else if (strncmp("warning", kbuf, strlen("warning")) == 0) ++ *levp = VCHIQ_LOG_WARNING; ++ else if (strncmp("info", kbuf, strlen("info")) == 0) ++ *levp = VCHIQ_LOG_INFO; ++ else if (strncmp("trace", kbuf, strlen("trace")) == 0) ++ *levp = VCHIQ_LOG_TRACE; ++ else ++ *levp = VCHIQ_LOG_DEFAULT; ++ ++ *ppos += count; ++ ++ return count; ++} ++ ++static const struct file_operations debugfs_log_fops = { ++ .owner = THIS_MODULE, ++ .open = debugfs_log_open, ++ .write = debugfs_log_write, ++ .read = seq_read, ++ .llseek = seq_lseek, ++ .release = single_release, ++}; ++ ++/* create an entry under <debugfs>/vchiq/log for each log category */ ++static int vchiq_debugfs_create_log_entries(struct dentry *top) ++{ ++ struct dentry *dir; ++ size_t i; ++ int ret = 0; ++ dir = debugfs_create_dir("log", vchiq_debugfs_top()); ++ if (!dir) ++ return -ENOMEM; ++ debugfs_info.log_categories = dir; ++ ++ for (i = 0; i < n_log_entries; i++) { ++ void *levp = (void *)vchiq_debugfs_log_entries[i].plevel; ++ dir = debugfs_create_file(vchiq_debugfs_log_entries[i].name, ++ 0644, ++ debugfs_info.log_categories, ++ levp, ++ &debugfs_log_fops); ++ if (!dir) { ++ ret = -ENOMEM; ++ break; ++ } ++ ++ vchiq_debugfs_log_entries[i].dir = dir; ++ } ++ return ret; ++} ++ ++static int debugfs_usecount_show(struct seq_file *f, void *offset) ++{ ++ VCHIQ_INSTANCE_T instance = f->private; ++ int use_count; ++ ++ use_count = vchiq_instance_get_use_count(instance); ++ seq_printf(f, "%d\n", use_count); ++ ++ return 0; ++} ++ ++static int debugfs_usecount_open(struct inode *inode, struct file *file) ++{ ++ return single_open(file, debugfs_usecount_show, inode->i_private); ++} ++ ++static const struct file_operations debugfs_usecount_fops = { ++ .owner = THIS_MODULE, ++ .open = debugfs_usecount_open, ++ .read = seq_read, ++ .llseek = seq_lseek, ++ .release = single_release, ++}; ++ ++static int debugfs_trace_show(struct seq_file *f, void *offset) ++{ ++ VCHIQ_INSTANCE_T instance = f->private; ++ int trace; ++ ++ trace = vchiq_instance_get_trace(instance); ++ seq_printf(f, "%s\n", trace ? "Y" : "N"); ++ ++ return 0; ++} ++ ++static int debugfs_trace_open(struct inode *inode, struct file *file) ++{ ++ return single_open(file, debugfs_trace_show, inode->i_private); ++} ++ ++static int debugfs_trace_write(struct file *file, ++ const char __user *buffer, ++ size_t count, loff_t *ppos) ++{ ++ struct seq_file *f = (struct seq_file *)file->private_data; ++ VCHIQ_INSTANCE_T instance = f->private; ++ char firstchar; ++ ++ if (copy_from_user(&firstchar, buffer, 1) != 0) ++ return -EFAULT; ++ ++ switch (firstchar) { ++ case 'Y': ++ case 'y': ++ case '1': ++ vchiq_instance_set_trace(instance, 1); ++ break; ++ case 'N': ++ case 'n': ++ case '0': ++ vchiq_instance_set_trace(instance, 0); ++ break; ++ default: ++ break; ++ } ++ ++ *ppos += count; ++ ++ return count; ++} ++ ++static const struct file_operations debugfs_trace_fops = { ++ .owner = THIS_MODULE, ++ .open = debugfs_trace_open, ++ .write = debugfs_trace_write, ++ .read = seq_read, ++ .llseek = seq_lseek, ++ .release = single_release, ++}; ++ ++/* add an instance (process) to the debugfs entries */ ++int vchiq_debugfs_add_instance(VCHIQ_INSTANCE_T instance) ++{ ++ char pidstr[16]; ++ struct dentry *top, *use_count, *trace; ++ struct dentry *clients = vchiq_clients_top(); ++ ++ snprintf(pidstr, sizeof(pidstr), "%d", ++ vchiq_instance_get_pid(instance)); ++ ++ top = debugfs_create_dir(pidstr, clients); ++ if (!top) ++ goto fail_top; ++ ++ use_count = debugfs_create_file("use_count", ++ 0444, top, ++ instance, ++ &debugfs_usecount_fops); ++ if (!use_count) ++ goto fail_use_count; ++ ++ trace = debugfs_create_file("trace", ++ 0644, top, ++ instance, ++ &debugfs_trace_fops); ++ if (!trace) ++ goto fail_trace; ++ ++ vchiq_instance_get_debugfs_node(instance)->dentry = top; ++ ++ return 0; ++ ++fail_trace: ++ debugfs_remove(use_count); ++fail_use_count: ++ debugfs_remove(top); ++fail_top: ++ return -ENOMEM; ++} ++ ++void vchiq_debugfs_remove_instance(VCHIQ_INSTANCE_T instance) ++{ ++ VCHIQ_DEBUGFS_NODE_T *node = vchiq_instance_get_debugfs_node(instance); ++ debugfs_remove_recursive(node->dentry); ++} ++ ++ ++int vchiq_debugfs_init(void) ++{ ++ BUG_ON(debugfs_info.vchiq_cfg_dir != NULL); ++ ++ debugfs_info.vchiq_cfg_dir = debugfs_create_dir("vchiq", NULL); ++ if (debugfs_info.vchiq_cfg_dir == NULL) ++ goto fail; ++ ++ debugfs_info.clients = debugfs_create_dir("clients", ++ vchiq_debugfs_top()); ++ if (!debugfs_info.clients) ++ goto fail; ++ ++ if (vchiq_debugfs_create_log_entries(vchiq_debugfs_top()) != 0) ++ goto fail; ++ ++ return 0; ++ ++fail: ++ vchiq_debugfs_deinit(); ++ vchiq_log_error(vchiq_arm_log_level, ++ "%s: failed to create debugfs directory", ++ __func__); ++ ++ return -ENOMEM; ++} ++ ++/* remove all the debugfs entries */ ++void vchiq_debugfs_deinit(void) ++{ ++ debugfs_remove_recursive(vchiq_debugfs_top()); ++} ++ ++static struct dentry *vchiq_clients_top(void) ++{ ++ return debugfs_info.clients; ++} ++ ++static struct dentry *vchiq_debugfs_top(void) ++{ ++ BUG_ON(debugfs_info.vchiq_cfg_dir == NULL); ++ return debugfs_info.vchiq_cfg_dir; ++} ++ ++#else /* CONFIG_DEBUG_FS */ ++ ++int vchiq_debugfs_init(void) ++{ ++ return 0; ++} ++ ++void vchiq_debugfs_deinit(void) ++{ ++} ++ ++int vchiq_debugfs_add_instance(VCHIQ_INSTANCE_T instance) ++{ ++ return 0; ++} ++ ++void vchiq_debugfs_remove_instance(VCHIQ_INSTANCE_T instance) ++{ ++} ++ ++#endif /* CONFIG_DEBUG_FS */ +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_debugfs.h +@@ -0,0 +1,52 @@ ++/** ++ * Copyright (c) 2014 Raspberry Pi (Trading) Ltd. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#ifndef VCHIQ_DEBUGFS_H ++#define VCHIQ_DEBUGFS_H ++ ++#include "vchiq_core.h" ++ ++typedef struct vchiq_debugfs_node_struct ++{ ++ struct dentry *dentry; ++} VCHIQ_DEBUGFS_NODE_T; ++ ++int vchiq_debugfs_init(void); ++ ++void vchiq_debugfs_deinit(void); ++ ++int vchiq_debugfs_add_instance(VCHIQ_INSTANCE_T instance); ++ ++void vchiq_debugfs_remove_instance(VCHIQ_INSTANCE_T instance); ++ ++#endif /* VCHIQ_DEBUGFS_H */ +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_genversion +@@ -0,0 +1,87 @@ ++#!/usr/bin/perl -w ++ ++use strict; ++ ++# ++# Generate a version from available information ++# ++ ++my $prefix = shift @ARGV; ++my $root = shift @ARGV; ++ ++ ++if ( not defined $root ) { ++ die "usage: $0 prefix root-dir\n"; ++} ++ ++if ( ! -d $root ) { ++ die "root directory $root not found\n"; ++} ++ ++my $version = "unknown"; ++my $tainted = ""; ++ ++if ( -d "$root/.git" ) { ++ # attempt to work out git version. only do so ++ # on a linux build host, as cygwin builds are ++ # already slow enough ++ ++ if ( -f "/usr/bin/git" || -f "/usr/local/bin/git" ) { ++ if (not open(F, "git --git-dir $root/.git rev-parse --verify HEAD|")) { ++ $version = "no git version"; ++ } ++ else { ++ $version = <F>; ++ $version =~ s/[ \r\n]*$//; # chomp may not be enough (cygwin). ++ $version =~ s/^[ \r\n]*//; # chomp may not be enough (cygwin). ++ } ++ ++ if (open(G, "git --git-dir $root/.git status --porcelain|")) { ++ $tainted = <G>; ++ $tainted =~ s/[ \r\n]*$//; # chomp may not be enough (cygwin). ++ $tainted =~ s/^[ \r\n]*//; # chomp may not be enough (cygwin). ++ if (length $tainted) { ++ $version = join ' ', $version, "(tainted)"; ++ } ++ else { ++ $version = join ' ', $version, "(clean)"; ++ } ++ } ++ } ++} ++ ++my $hostname = `hostname`; ++$hostname =~ s/[ \r\n]*$//; # chomp may not be enough (cygwin). ++$hostname =~ s/^[ \r\n]*//; # chomp may not be enough (cygwin). ++ ++ ++print STDERR "Version $version\n"; ++print <<EOF; ++#include "${prefix}_build_info.h" ++#include <linux/broadcom/vc_debug_sym.h> ++ ++VC_DEBUG_DECLARE_STRING_VAR( ${prefix}_build_hostname, "$hostname" ); ++VC_DEBUG_DECLARE_STRING_VAR( ${prefix}_build_version, "$version" ); ++VC_DEBUG_DECLARE_STRING_VAR( ${prefix}_build_time, __TIME__ ); ++VC_DEBUG_DECLARE_STRING_VAR( ${prefix}_build_date, __DATE__ ); ++ ++const char *vchiq_get_build_hostname( void ) ++{ ++ return vchiq_build_hostname; ++} ++ ++const char *vchiq_get_build_version( void ) ++{ ++ return vchiq_build_version; ++} ++ ++const char *vchiq_get_build_date( void ) ++{ ++ return vchiq_build_date; ++} ++ ++const char *vchiq_get_build_time( void ) ++{ ++ return vchiq_build_time; ++} ++EOF +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_if.h +@@ -0,0 +1,189 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#ifndef VCHIQ_IF_H ++#define VCHIQ_IF_H ++ ++#include "interface/vchi/vchi_mh.h" ++ ++#define VCHIQ_SERVICE_HANDLE_INVALID 0 ++ ++#define VCHIQ_SLOT_SIZE 4096 ++#define VCHIQ_MAX_MSG_SIZE (VCHIQ_SLOT_SIZE - sizeof(VCHIQ_HEADER_T)) ++#define VCHIQ_CHANNEL_SIZE VCHIQ_MAX_MSG_SIZE /* For backwards compatibility */ ++ ++#define VCHIQ_MAKE_FOURCC(x0, x1, x2, x3) \ ++ (((x0) << 24) | ((x1) << 16) | ((x2) << 8) | (x3)) ++#define VCHIQ_GET_SERVICE_USERDATA(service) vchiq_get_service_userdata(service) ++#define VCHIQ_GET_SERVICE_FOURCC(service) vchiq_get_service_fourcc(service) ++ ++typedef enum { ++ VCHIQ_SERVICE_OPENED, /* service, -, - */ ++ VCHIQ_SERVICE_CLOSED, /* service, -, - */ ++ VCHIQ_MESSAGE_AVAILABLE, /* service, header, - */ ++ VCHIQ_BULK_TRANSMIT_DONE, /* service, -, bulk_userdata */ ++ VCHIQ_BULK_RECEIVE_DONE, /* service, -, bulk_userdata */ ++ VCHIQ_BULK_TRANSMIT_ABORTED, /* service, -, bulk_userdata */ ++ VCHIQ_BULK_RECEIVE_ABORTED /* service, -, bulk_userdata */ ++} VCHIQ_REASON_T; ++ ++typedef enum { ++ VCHIQ_ERROR = -1, ++ VCHIQ_SUCCESS = 0, ++ VCHIQ_RETRY = 1 ++} VCHIQ_STATUS_T; ++ ++typedef enum { ++ VCHIQ_BULK_MODE_CALLBACK, ++ VCHIQ_BULK_MODE_BLOCKING, ++ VCHIQ_BULK_MODE_NOCALLBACK, ++ VCHIQ_BULK_MODE_WAITING /* Reserved for internal use */ ++} VCHIQ_BULK_MODE_T; ++ ++typedef enum { ++ VCHIQ_SERVICE_OPTION_AUTOCLOSE, ++ VCHIQ_SERVICE_OPTION_SLOT_QUOTA, ++ VCHIQ_SERVICE_OPTION_MESSAGE_QUOTA, ++ VCHIQ_SERVICE_OPTION_SYNCHRONOUS, ++ VCHIQ_SERVICE_OPTION_TRACE ++} VCHIQ_SERVICE_OPTION_T; ++ ++typedef struct vchiq_header_struct { ++ /* The message identifier - opaque to applications. */ ++ int msgid; ++ ++ /* Size of message data. */ ++ unsigned int size; ++ ++ char data[0]; /* message */ ++} VCHIQ_HEADER_T; ++ ++typedef struct { ++ const void *data; ++ unsigned int size; ++} VCHIQ_ELEMENT_T; ++ ++typedef unsigned int VCHIQ_SERVICE_HANDLE_T; ++ ++typedef VCHIQ_STATUS_T (*VCHIQ_CALLBACK_T)(VCHIQ_REASON_T, VCHIQ_HEADER_T *, ++ VCHIQ_SERVICE_HANDLE_T, void *); ++ ++typedef struct vchiq_service_base_struct { ++ int fourcc; ++ VCHIQ_CALLBACK_T callback; ++ void *userdata; ++} VCHIQ_SERVICE_BASE_T; ++ ++typedef struct vchiq_service_params_struct { ++ int fourcc; ++ VCHIQ_CALLBACK_T callback; ++ void *userdata; ++ short version; /* Increment for non-trivial changes */ ++ short version_min; /* Update for incompatible changes */ ++} VCHIQ_SERVICE_PARAMS_T; ++ ++typedef struct vchiq_config_struct { ++ unsigned int max_msg_size; ++ unsigned int bulk_threshold; /* The message size above which it ++ is better to use a bulk transfer ++ (<= max_msg_size) */ ++ unsigned int max_outstanding_bulks; ++ unsigned int max_services; ++ short version; /* The version of VCHIQ */ ++ short version_min; /* The minimum compatible version of VCHIQ */ ++} VCHIQ_CONFIG_T; ++ ++typedef struct vchiq_instance_struct *VCHIQ_INSTANCE_T; ++typedef void (*VCHIQ_REMOTE_USE_CALLBACK_T)(void *cb_arg); ++ ++extern VCHIQ_STATUS_T vchiq_initialise(VCHIQ_INSTANCE_T *pinstance); ++extern VCHIQ_STATUS_T vchiq_shutdown(VCHIQ_INSTANCE_T instance); ++extern VCHIQ_STATUS_T vchiq_connect(VCHIQ_INSTANCE_T instance); ++extern VCHIQ_STATUS_T vchiq_add_service(VCHIQ_INSTANCE_T instance, ++ const VCHIQ_SERVICE_PARAMS_T *params, ++ VCHIQ_SERVICE_HANDLE_T *pservice); ++extern VCHIQ_STATUS_T vchiq_open_service(VCHIQ_INSTANCE_T instance, ++ const VCHIQ_SERVICE_PARAMS_T *params, ++ VCHIQ_SERVICE_HANDLE_T *pservice); ++extern VCHIQ_STATUS_T vchiq_close_service(VCHIQ_SERVICE_HANDLE_T service); ++extern VCHIQ_STATUS_T vchiq_remove_service(VCHIQ_SERVICE_HANDLE_T service); ++extern VCHIQ_STATUS_T vchiq_use_service(VCHIQ_SERVICE_HANDLE_T service); ++extern VCHIQ_STATUS_T vchiq_use_service_no_resume( ++ VCHIQ_SERVICE_HANDLE_T service); ++extern VCHIQ_STATUS_T vchiq_release_service(VCHIQ_SERVICE_HANDLE_T service); ++ ++extern VCHIQ_STATUS_T vchiq_queue_message(VCHIQ_SERVICE_HANDLE_T service, ++ const VCHIQ_ELEMENT_T *elements, unsigned int count); ++extern void vchiq_release_message(VCHIQ_SERVICE_HANDLE_T service, ++ VCHIQ_HEADER_T *header); ++extern VCHIQ_STATUS_T vchiq_queue_bulk_transmit(VCHIQ_SERVICE_HANDLE_T service, ++ const void *data, unsigned int size, void *userdata); ++extern VCHIQ_STATUS_T vchiq_queue_bulk_receive(VCHIQ_SERVICE_HANDLE_T service, ++ void *data, unsigned int size, void *userdata); ++extern VCHIQ_STATUS_T vchiq_queue_bulk_transmit_handle( ++ VCHIQ_SERVICE_HANDLE_T service, VCHI_MEM_HANDLE_T handle, ++ const void *offset, unsigned int size, void *userdata); ++extern VCHIQ_STATUS_T vchiq_queue_bulk_receive_handle( ++ VCHIQ_SERVICE_HANDLE_T service, VCHI_MEM_HANDLE_T handle, ++ void *offset, unsigned int size, void *userdata); ++extern VCHIQ_STATUS_T vchiq_bulk_transmit(VCHIQ_SERVICE_HANDLE_T service, ++ const void *data, unsigned int size, void *userdata, ++ VCHIQ_BULK_MODE_T mode); ++extern VCHIQ_STATUS_T vchiq_bulk_receive(VCHIQ_SERVICE_HANDLE_T service, ++ void *data, unsigned int size, void *userdata, ++ VCHIQ_BULK_MODE_T mode); ++extern VCHIQ_STATUS_T vchiq_bulk_transmit_handle(VCHIQ_SERVICE_HANDLE_T service, ++ VCHI_MEM_HANDLE_T handle, const void *offset, unsigned int size, ++ void *userdata, VCHIQ_BULK_MODE_T mode); ++extern VCHIQ_STATUS_T vchiq_bulk_receive_handle(VCHIQ_SERVICE_HANDLE_T service, ++ VCHI_MEM_HANDLE_T handle, void *offset, unsigned int size, ++ void *userdata, VCHIQ_BULK_MODE_T mode); ++extern int vchiq_get_client_id(VCHIQ_SERVICE_HANDLE_T service); ++extern void *vchiq_get_service_userdata(VCHIQ_SERVICE_HANDLE_T service); ++extern int vchiq_get_service_fourcc(VCHIQ_SERVICE_HANDLE_T service); ++extern VCHIQ_STATUS_T vchiq_get_config(VCHIQ_INSTANCE_T instance, ++ int config_size, VCHIQ_CONFIG_T *pconfig); ++extern VCHIQ_STATUS_T vchiq_set_service_option(VCHIQ_SERVICE_HANDLE_T service, ++ VCHIQ_SERVICE_OPTION_T option, int value); ++ ++extern VCHIQ_STATUS_T vchiq_remote_use(VCHIQ_INSTANCE_T instance, ++ VCHIQ_REMOTE_USE_CALLBACK_T callback, void *cb_arg); ++extern VCHIQ_STATUS_T vchiq_remote_release(VCHIQ_INSTANCE_T instance); ++ ++extern VCHIQ_STATUS_T vchiq_dump_phys_mem(VCHIQ_SERVICE_HANDLE_T service, ++ void *ptr, size_t num_bytes); ++ ++extern VCHIQ_STATUS_T vchiq_get_peer_version(VCHIQ_SERVICE_HANDLE_T handle, ++ short *peer_version); ++ ++#endif /* VCHIQ_IF_H */ +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_ioctl.h +@@ -0,0 +1,131 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#ifndef VCHIQ_IOCTLS_H ++#define VCHIQ_IOCTLS_H ++ ++#include <linux/ioctl.h> ++#include "vchiq_if.h" ++ ++#define VCHIQ_IOC_MAGIC 0xc4 ++#define VCHIQ_INVALID_HANDLE (~0) ++ ++typedef struct { ++ VCHIQ_SERVICE_PARAMS_T params; ++ int is_open; ++ int is_vchi; ++ unsigned int handle; /* OUT */ ++} VCHIQ_CREATE_SERVICE_T; ++ ++typedef struct { ++ unsigned int handle; ++ unsigned int count; ++ const VCHIQ_ELEMENT_T *elements; ++} VCHIQ_QUEUE_MESSAGE_T; ++ ++typedef struct { ++ unsigned int handle; ++ void *data; ++ unsigned int size; ++ void *userdata; ++ VCHIQ_BULK_MODE_T mode; ++} VCHIQ_QUEUE_BULK_TRANSFER_T; ++ ++typedef struct { ++ VCHIQ_REASON_T reason; ++ VCHIQ_HEADER_T *header; ++ void *service_userdata; ++ void *bulk_userdata; ++} VCHIQ_COMPLETION_DATA_T; ++ ++typedef struct { ++ unsigned int count; ++ VCHIQ_COMPLETION_DATA_T *buf; ++ unsigned int msgbufsize; ++ unsigned int msgbufcount; /* IN/OUT */ ++ void **msgbufs; ++} VCHIQ_AWAIT_COMPLETION_T; ++ ++typedef struct { ++ unsigned int handle; ++ int blocking; ++ unsigned int bufsize; ++ void *buf; ++} VCHIQ_DEQUEUE_MESSAGE_T; ++ ++typedef struct { ++ unsigned int config_size; ++ VCHIQ_CONFIG_T *pconfig; ++} VCHIQ_GET_CONFIG_T; ++ ++typedef struct { ++ unsigned int handle; ++ VCHIQ_SERVICE_OPTION_T option; ++ int value; ++} VCHIQ_SET_SERVICE_OPTION_T; ++ ++typedef struct { ++ void *virt_addr; ++ size_t num_bytes; ++} VCHIQ_DUMP_MEM_T; ++ ++#define VCHIQ_IOC_CONNECT _IO(VCHIQ_IOC_MAGIC, 0) ++#define VCHIQ_IOC_SHUTDOWN _IO(VCHIQ_IOC_MAGIC, 1) ++#define VCHIQ_IOC_CREATE_SERVICE \ ++ _IOWR(VCHIQ_IOC_MAGIC, 2, VCHIQ_CREATE_SERVICE_T) ++#define VCHIQ_IOC_REMOVE_SERVICE _IO(VCHIQ_IOC_MAGIC, 3) ++#define VCHIQ_IOC_QUEUE_MESSAGE \ ++ _IOW(VCHIQ_IOC_MAGIC, 4, VCHIQ_QUEUE_MESSAGE_T) ++#define VCHIQ_IOC_QUEUE_BULK_TRANSMIT \ ++ _IOWR(VCHIQ_IOC_MAGIC, 5, VCHIQ_QUEUE_BULK_TRANSFER_T) ++#define VCHIQ_IOC_QUEUE_BULK_RECEIVE \ ++ _IOWR(VCHIQ_IOC_MAGIC, 6, VCHIQ_QUEUE_BULK_TRANSFER_T) ++#define VCHIQ_IOC_AWAIT_COMPLETION \ ++ _IOWR(VCHIQ_IOC_MAGIC, 7, VCHIQ_AWAIT_COMPLETION_T) ++#define VCHIQ_IOC_DEQUEUE_MESSAGE \ ++ _IOWR(VCHIQ_IOC_MAGIC, 8, VCHIQ_DEQUEUE_MESSAGE_T) ++#define VCHIQ_IOC_GET_CLIENT_ID _IO(VCHIQ_IOC_MAGIC, 9) ++#define VCHIQ_IOC_GET_CONFIG \ ++ _IOWR(VCHIQ_IOC_MAGIC, 10, VCHIQ_GET_CONFIG_T) ++#define VCHIQ_IOC_CLOSE_SERVICE _IO(VCHIQ_IOC_MAGIC, 11) ++#define VCHIQ_IOC_USE_SERVICE _IO(VCHIQ_IOC_MAGIC, 12) ++#define VCHIQ_IOC_RELEASE_SERVICE _IO(VCHIQ_IOC_MAGIC, 13) ++#define VCHIQ_IOC_SET_SERVICE_OPTION \ ++ _IOW(VCHIQ_IOC_MAGIC, 14, VCHIQ_SET_SERVICE_OPTION_T) ++#define VCHIQ_IOC_DUMP_PHYS_MEM \ ++ _IOW(VCHIQ_IOC_MAGIC, 15, VCHIQ_DUMP_MEM_T) ++#define VCHIQ_IOC_LIB_VERSION _IO(VCHIQ_IOC_MAGIC, 16) ++#define VCHIQ_IOC_CLOSE_DELIVERED _IO(VCHIQ_IOC_MAGIC, 17) ++#define VCHIQ_IOC_MAX 17 ++ ++#endif +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_kern_lib.c +@@ -0,0 +1,458 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++/* ---- Include Files ---------------------------------------------------- */ ++ ++#include <linux/kernel.h> ++#include <linux/module.h> ++#include <linux/mutex.h> ++ ++#include "vchiq_core.h" ++#include "vchiq_arm.h" ++#include "vchiq_killable.h" ++ ++/* ---- Public Variables ------------------------------------------------- */ ++ ++/* ---- Private Constants and Types -------------------------------------- */ ++ ++struct bulk_waiter_node { ++ struct bulk_waiter bulk_waiter; ++ int pid; ++ struct list_head list; ++}; ++ ++struct vchiq_instance_struct { ++ VCHIQ_STATE_T *state; ++ ++ int connected; ++ ++ struct list_head bulk_waiter_list; ++ struct mutex bulk_waiter_list_mutex; ++}; ++ ++static VCHIQ_STATUS_T ++vchiq_blocking_bulk_transfer(VCHIQ_SERVICE_HANDLE_T handle, void *data, ++ unsigned int size, VCHIQ_BULK_DIR_T dir); ++ ++/**************************************************************************** ++* ++* vchiq_initialise ++* ++***************************************************************************/ ++#define VCHIQ_INIT_RETRIES 10 ++VCHIQ_STATUS_T vchiq_initialise(VCHIQ_INSTANCE_T *instanceOut) ++{ ++ VCHIQ_STATUS_T status = VCHIQ_ERROR; ++ VCHIQ_STATE_T *state; ++ VCHIQ_INSTANCE_T instance = NULL; ++ int i; ++ ++ vchiq_log_trace(vchiq_core_log_level, "%s called", __func__); ++ ++ /* VideoCore may not be ready due to boot up timing. ++ It may never be ready if kernel and firmware are mismatched, so don't block forever. */ ++ for (i=0; i<VCHIQ_INIT_RETRIES; i++) { ++ state = vchiq_get_state(); ++ if (state) ++ break; ++ udelay(500); ++ } ++ if (i==VCHIQ_INIT_RETRIES) { ++ vchiq_log_error(vchiq_core_log_level, ++ "%s: videocore not initialized\n", __func__); ++ goto failed; ++ } else if (i>0) { ++ vchiq_log_warning(vchiq_core_log_level, ++ "%s: videocore initialized after %d retries\n", __func__, i); ++ } ++ ++ instance = kzalloc(sizeof(*instance), GFP_KERNEL); ++ if (!instance) { ++ vchiq_log_error(vchiq_core_log_level, ++ "%s: error allocating vchiq instance\n", __func__); ++ goto failed; ++ } ++ ++ instance->connected = 0; ++ instance->state = state; ++ mutex_init(&instance->bulk_waiter_list_mutex); ++ INIT_LIST_HEAD(&instance->bulk_waiter_list); ++ ++ *instanceOut = instance; ++ ++ status = VCHIQ_SUCCESS; ++ ++failed: ++ vchiq_log_trace(vchiq_core_log_level, ++ "%s(%p): returning %d", __func__, instance, status); ++ ++ return status; ++} ++EXPORT_SYMBOL(vchiq_initialise); ++ ++/**************************************************************************** ++* ++* vchiq_shutdown ++* ++***************************************************************************/ ++ ++VCHIQ_STATUS_T vchiq_shutdown(VCHIQ_INSTANCE_T instance) ++{ ++ VCHIQ_STATUS_T status; ++ VCHIQ_STATE_T *state = instance->state; ++ ++ vchiq_log_trace(vchiq_core_log_level, ++ "%s(%p) called", __func__, instance); ++ ++ if (mutex_lock_interruptible(&state->mutex) != 0) ++ return VCHIQ_RETRY; ++ ++ /* Remove all services */ ++ status = vchiq_shutdown_internal(state, instance); ++ ++ mutex_unlock(&state->mutex); ++ ++ vchiq_log_trace(vchiq_core_log_level, ++ "%s(%p): returning %d", __func__, instance, status); ++ ++ if (status == VCHIQ_SUCCESS) { ++ struct list_head *pos, *next; ++ list_for_each_safe(pos, next, ++ &instance->bulk_waiter_list) { ++ struct bulk_waiter_node *waiter; ++ waiter = list_entry(pos, ++ struct bulk_waiter_node, ++ list); ++ list_del(pos); ++ vchiq_log_info(vchiq_arm_log_level, ++ "bulk_waiter - cleaned up %x " ++ "for pid %d", ++ (unsigned int)waiter, waiter->pid); ++ kfree(waiter); ++ } ++ kfree(instance); ++ } ++ ++ return status; ++} ++EXPORT_SYMBOL(vchiq_shutdown); ++ ++/**************************************************************************** ++* ++* vchiq_is_connected ++* ++***************************************************************************/ ++ ++int vchiq_is_connected(VCHIQ_INSTANCE_T instance) ++{ ++ return instance->connected; ++} ++ ++/**************************************************************************** ++* ++* vchiq_connect ++* ++***************************************************************************/ ++ ++VCHIQ_STATUS_T vchiq_connect(VCHIQ_INSTANCE_T instance) ++{ ++ VCHIQ_STATUS_T status; ++ VCHIQ_STATE_T *state = instance->state; ++ ++ vchiq_log_trace(vchiq_core_log_level, ++ "%s(%p) called", __func__, instance); ++ ++ if (mutex_lock_interruptible(&state->mutex) != 0) { ++ vchiq_log_trace(vchiq_core_log_level, ++ "%s: call to mutex_lock failed", __func__); ++ status = VCHIQ_RETRY; ++ goto failed; ++ } ++ status = vchiq_connect_internal(state, instance); ++ ++ if (status == VCHIQ_SUCCESS) ++ instance->connected = 1; ++ ++ mutex_unlock(&state->mutex); ++ ++failed: ++ vchiq_log_trace(vchiq_core_log_level, ++ "%s(%p): returning %d", __func__, instance, status); ++ ++ return status; ++} ++EXPORT_SYMBOL(vchiq_connect); ++ ++/**************************************************************************** ++* ++* vchiq_add_service ++* ++***************************************************************************/ ++ ++VCHIQ_STATUS_T vchiq_add_service( ++ VCHIQ_INSTANCE_T instance, ++ const VCHIQ_SERVICE_PARAMS_T *params, ++ VCHIQ_SERVICE_HANDLE_T *phandle) ++{ ++ VCHIQ_STATUS_T status; ++ VCHIQ_STATE_T *state = instance->state; ++ VCHIQ_SERVICE_T *service = NULL; ++ int srvstate; ++ ++ vchiq_log_trace(vchiq_core_log_level, ++ "%s(%p) called", __func__, instance); ++ ++ *phandle = VCHIQ_SERVICE_HANDLE_INVALID; ++ ++ srvstate = vchiq_is_connected(instance) ++ ? VCHIQ_SRVSTATE_LISTENING ++ : VCHIQ_SRVSTATE_HIDDEN; ++ ++ service = vchiq_add_service_internal( ++ state, ++ params, ++ srvstate, ++ instance, ++ NULL); ++ ++ if (service) { ++ *phandle = service->handle; ++ status = VCHIQ_SUCCESS; ++ } else ++ status = VCHIQ_ERROR; ++ ++ vchiq_log_trace(vchiq_core_log_level, ++ "%s(%p): returning %d", __func__, instance, status); ++ ++ return status; ++} ++EXPORT_SYMBOL(vchiq_add_service); ++ ++/**************************************************************************** ++* ++* vchiq_open_service ++* ++***************************************************************************/ ++ ++VCHIQ_STATUS_T vchiq_open_service( ++ VCHIQ_INSTANCE_T instance, ++ const VCHIQ_SERVICE_PARAMS_T *params, ++ VCHIQ_SERVICE_HANDLE_T *phandle) ++{ ++ VCHIQ_STATUS_T status = VCHIQ_ERROR; ++ VCHIQ_STATE_T *state = instance->state; ++ VCHIQ_SERVICE_T *service = NULL; ++ ++ vchiq_log_trace(vchiq_core_log_level, ++ "%s(%p) called", __func__, instance); ++ ++ *phandle = VCHIQ_SERVICE_HANDLE_INVALID; ++ ++ if (!vchiq_is_connected(instance)) ++ goto failed; ++ ++ service = vchiq_add_service_internal(state, ++ params, ++ VCHIQ_SRVSTATE_OPENING, ++ instance, ++ NULL); ++ ++ if (service) { ++ *phandle = service->handle; ++ status = vchiq_open_service_internal(service, current->pid); ++ if (status != VCHIQ_SUCCESS) { ++ vchiq_remove_service(service->handle); ++ *phandle = VCHIQ_SERVICE_HANDLE_INVALID; ++ } ++ } ++ ++failed: ++ vchiq_log_trace(vchiq_core_log_level, ++ "%s(%p): returning %d", __func__, instance, status); ++ ++ return status; ++} ++EXPORT_SYMBOL(vchiq_open_service); ++ ++VCHIQ_STATUS_T ++vchiq_queue_bulk_transmit(VCHIQ_SERVICE_HANDLE_T handle, ++ const void *data, unsigned int size, void *userdata) ++{ ++ return vchiq_bulk_transfer(handle, ++ VCHI_MEM_HANDLE_INVALID, (void *)data, size, userdata, ++ VCHIQ_BULK_MODE_CALLBACK, VCHIQ_BULK_TRANSMIT); ++} ++EXPORT_SYMBOL(vchiq_queue_bulk_transmit); ++ ++VCHIQ_STATUS_T ++vchiq_queue_bulk_receive(VCHIQ_SERVICE_HANDLE_T handle, void *data, ++ unsigned int size, void *userdata) ++{ ++ return vchiq_bulk_transfer(handle, ++ VCHI_MEM_HANDLE_INVALID, data, size, userdata, ++ VCHIQ_BULK_MODE_CALLBACK, VCHIQ_BULK_RECEIVE); ++} ++EXPORT_SYMBOL(vchiq_queue_bulk_receive); ++ ++VCHIQ_STATUS_T ++vchiq_bulk_transmit(VCHIQ_SERVICE_HANDLE_T handle, const void *data, ++ unsigned int size, void *userdata, VCHIQ_BULK_MODE_T mode) ++{ ++ VCHIQ_STATUS_T status; ++ ++ switch (mode) { ++ case VCHIQ_BULK_MODE_NOCALLBACK: ++ case VCHIQ_BULK_MODE_CALLBACK: ++ status = vchiq_bulk_transfer(handle, ++ VCHI_MEM_HANDLE_INVALID, (void *)data, size, userdata, ++ mode, VCHIQ_BULK_TRANSMIT); ++ break; ++ case VCHIQ_BULK_MODE_BLOCKING: ++ status = vchiq_blocking_bulk_transfer(handle, ++ (void *)data, size, VCHIQ_BULK_TRANSMIT); ++ break; ++ default: ++ return VCHIQ_ERROR; ++ } ++ ++ return status; ++} ++EXPORT_SYMBOL(vchiq_bulk_transmit); ++ ++VCHIQ_STATUS_T ++vchiq_bulk_receive(VCHIQ_SERVICE_HANDLE_T handle, void *data, ++ unsigned int size, void *userdata, VCHIQ_BULK_MODE_T mode) ++{ ++ VCHIQ_STATUS_T status; ++ ++ switch (mode) { ++ case VCHIQ_BULK_MODE_NOCALLBACK: ++ case VCHIQ_BULK_MODE_CALLBACK: ++ status = vchiq_bulk_transfer(handle, ++ VCHI_MEM_HANDLE_INVALID, data, size, userdata, ++ mode, VCHIQ_BULK_RECEIVE); ++ break; ++ case VCHIQ_BULK_MODE_BLOCKING: ++ status = vchiq_blocking_bulk_transfer(handle, ++ (void *)data, size, VCHIQ_BULK_RECEIVE); ++ break; ++ default: ++ return VCHIQ_ERROR; ++ } ++ ++ return status; ++} ++EXPORT_SYMBOL(vchiq_bulk_receive); ++ ++static VCHIQ_STATUS_T ++vchiq_blocking_bulk_transfer(VCHIQ_SERVICE_HANDLE_T handle, void *data, ++ unsigned int size, VCHIQ_BULK_DIR_T dir) ++{ ++ VCHIQ_INSTANCE_T instance; ++ VCHIQ_SERVICE_T *service; ++ VCHIQ_STATUS_T status; ++ struct bulk_waiter_node *waiter = NULL; ++ struct list_head *pos; ++ ++ service = find_service_by_handle(handle); ++ if (!service) ++ return VCHIQ_ERROR; ++ ++ instance = service->instance; ++ ++ unlock_service(service); ++ ++ mutex_lock(&instance->bulk_waiter_list_mutex); ++ list_for_each(pos, &instance->bulk_waiter_list) { ++ if (list_entry(pos, struct bulk_waiter_node, ++ list)->pid == current->pid) { ++ waiter = list_entry(pos, ++ struct bulk_waiter_node, ++ list); ++ list_del(pos); ++ break; ++ } ++ } ++ mutex_unlock(&instance->bulk_waiter_list_mutex); ++ ++ if (waiter) { ++ VCHIQ_BULK_T *bulk = waiter->bulk_waiter.bulk; ++ if (bulk) { ++ /* This thread has an outstanding bulk transfer. */ ++ if ((bulk->data != data) || ++ (bulk->size != size)) { ++ /* This is not a retry of the previous one. ++ ** Cancel the signal when the transfer ++ ** completes. */ ++ spin_lock(&bulk_waiter_spinlock); ++ bulk->userdata = NULL; ++ spin_unlock(&bulk_waiter_spinlock); ++ } ++ } ++ } ++ ++ if (!waiter) { ++ waiter = kzalloc(sizeof(struct bulk_waiter_node), GFP_KERNEL); ++ if (!waiter) { ++ vchiq_log_error(vchiq_core_log_level, ++ "%s - out of memory", __func__); ++ return VCHIQ_ERROR; ++ } ++ } ++ ++ status = vchiq_bulk_transfer(handle, VCHI_MEM_HANDLE_INVALID, ++ data, size, &waiter->bulk_waiter, VCHIQ_BULK_MODE_BLOCKING, ++ dir); ++ if ((status != VCHIQ_RETRY) || fatal_signal_pending(current) || ++ !waiter->bulk_waiter.bulk) { ++ VCHIQ_BULK_T *bulk = waiter->bulk_waiter.bulk; ++ if (bulk) { ++ /* Cancel the signal when the transfer ++ ** completes. */ ++ spin_lock(&bulk_waiter_spinlock); ++ bulk->userdata = NULL; ++ spin_unlock(&bulk_waiter_spinlock); ++ } ++ kfree(waiter); ++ } else { ++ waiter->pid = current->pid; ++ mutex_lock(&instance->bulk_waiter_list_mutex); ++ list_add(&waiter->list, &instance->bulk_waiter_list); ++ mutex_unlock(&instance->bulk_waiter_list_mutex); ++ vchiq_log_info(vchiq_arm_log_level, ++ "saved bulk_waiter %x for pid %d", ++ (unsigned int)waiter, current->pid); ++ } ++ ++ return status; ++} +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_killable.h +@@ -0,0 +1,69 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#ifndef VCHIQ_KILLABLE_H ++#define VCHIQ_KILLABLE_H ++ ++#include <linux/mutex.h> ++#include <linux/semaphore.h> ++ ++#define SHUTDOWN_SIGS (sigmask(SIGKILL) | sigmask(SIGINT) | sigmask(SIGQUIT) | sigmask(SIGTRAP) | sigmask(SIGSTOP) | sigmask(SIGCONT)) ++ ++static inline int __must_check down_interruptible_killable(struct semaphore *sem) ++{ ++ /* Allow interception of killable signals only. We don't want to be interrupted by harmless signals like SIGALRM */ ++ int ret; ++ sigset_t blocked, oldset; ++ siginitsetinv(&blocked, SHUTDOWN_SIGS); ++ sigprocmask(SIG_SETMASK, &blocked, &oldset); ++ ret = down_interruptible(sem); ++ sigprocmask(SIG_SETMASK, &oldset, NULL); ++ return ret; ++} ++#define down_interruptible down_interruptible_killable ++ ++ ++static inline int __must_check mutex_lock_interruptible_killable(struct mutex *lock) ++{ ++ /* Allow interception of killable signals only. We don't want to be interrupted by harmless signals like SIGALRM */ ++ int ret; ++ sigset_t blocked, oldset; ++ siginitsetinv(&blocked, SHUTDOWN_SIGS); ++ sigprocmask(SIG_SETMASK, &blocked, &oldset); ++ ret = mutex_lock_interruptible(lock); ++ sigprocmask(SIG_SETMASK, &oldset, NULL); ++ return ret; ++} ++#define mutex_lock_interruptible mutex_lock_interruptible_killable ++ ++#endif +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_memdrv.h +@@ -0,0 +1,71 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#ifndef VCHIQ_MEMDRV_H ++#define VCHIQ_MEMDRV_H ++ ++/* ---- Include Files ----------------------------------------------------- */ ++ ++#include <linux/kernel.h> ++#include "vchiq_if.h" ++ ++/* ---- Constants and Types ---------------------------------------------- */ ++ ++typedef struct { ++ void *armSharedMemVirt; ++ dma_addr_t armSharedMemPhys; ++ size_t armSharedMemSize; ++ ++ void *vcSharedMemVirt; ++ dma_addr_t vcSharedMemPhys; ++ size_t vcSharedMemSize; ++} VCHIQ_SHARED_MEM_INFO_T; ++ ++/* ---- Variable Externs ------------------------------------------------- */ ++ ++/* ---- Function Prototypes ---------------------------------------------- */ ++ ++void vchiq_get_shared_mem_info(VCHIQ_SHARED_MEM_INFO_T *info); ++ ++VCHIQ_STATUS_T vchiq_memdrv_initialise(void); ++ ++VCHIQ_STATUS_T vchiq_userdrv_create_instance( ++ const VCHIQ_PLATFORM_DATA_T * platform_data); ++ ++VCHIQ_STATUS_T vchiq_userdrv_suspend( ++ const VCHIQ_PLATFORM_DATA_T * platform_data); ++ ++VCHIQ_STATUS_T vchiq_userdrv_resume( ++ const VCHIQ_PLATFORM_DATA_T * platform_data); ++ ++#endif +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_pagelist.h +@@ -0,0 +1,58 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#ifndef VCHIQ_PAGELIST_H ++#define VCHIQ_PAGELIST_H ++ ++#ifndef PAGE_SIZE ++#define PAGE_SIZE 4096 ++#endif ++#define CACHE_LINE_SIZE 32 ++#define PAGELIST_WRITE 0 ++#define PAGELIST_READ 1 ++#define PAGELIST_READ_WITH_FRAGMENTS 2 ++ ++typedef struct pagelist_struct { ++ unsigned long length; ++ unsigned short type; ++ unsigned short offset; ++ unsigned long addrs[1]; /* N.B. 12 LSBs hold the number of following ++ pages at consecutive addresses. */ ++} PAGELIST_T; ++ ++typedef struct fragments_struct { ++ char headbuf[CACHE_LINE_SIZE]; ++ char tailbuf[CACHE_LINE_SIZE]; ++} FRAGMENTS_T; ++ ++#endif /* VCHIQ_PAGELIST_H */ +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_shim.c +@@ -0,0 +1,860 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++#include <linux/module.h> ++#include <linux/types.h> ++ ++#include "interface/vchi/vchi.h" ++#include "vchiq.h" ++#include "vchiq_core.h" ++ ++#include "vchiq_util.h" ++ ++#include <stddef.h> ++ ++#define vchiq_status_to_vchi(status) ((int32_t)status) ++ ++typedef struct { ++ VCHIQ_SERVICE_HANDLE_T handle; ++ ++ VCHIU_QUEUE_T queue; ++ ++ VCHI_CALLBACK_T callback; ++ void *callback_param; ++} SHIM_SERVICE_T; ++ ++/* ---------------------------------------------------------------------- ++ * return pointer to the mphi message driver function table ++ * -------------------------------------------------------------------- */ ++const VCHI_MESSAGE_DRIVER_T * ++vchi_mphi_message_driver_func_table(void) ++{ ++ return NULL; ++} ++ ++/* ---------------------------------------------------------------------- ++ * return a pointer to the 'single' connection driver fops ++ * -------------------------------------------------------------------- */ ++const VCHI_CONNECTION_API_T * ++single_get_func_table(void) ++{ ++ return NULL; ++} ++ ++VCHI_CONNECTION_T *vchi_create_connection( ++ const VCHI_CONNECTION_API_T *function_table, ++ const VCHI_MESSAGE_DRIVER_T *low_level) ++{ ++ (void)function_table; ++ (void)low_level; ++ return NULL; ++} ++ ++/*********************************************************** ++ * Name: vchi_msg_peek ++ * ++ * Arguments: const VCHI_SERVICE_HANDLE_T handle, ++ * void **data, ++ * uint32_t *msg_size, ++ ++ ++ * VCHI_FLAGS_T flags ++ * ++ * Description: Routine to return a pointer to the current message (to allow in ++ * place processing). The message can be removed using ++ * vchi_msg_remove when you're finished ++ * ++ * Returns: int32_t - success == 0 ++ * ++ ***********************************************************/ ++int32_t vchi_msg_peek(VCHI_SERVICE_HANDLE_T handle, ++ void **data, ++ uint32_t *msg_size, ++ VCHI_FLAGS_T flags) ++{ ++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle; ++ VCHIQ_HEADER_T *header; ++ ++ WARN_ON((flags != VCHI_FLAGS_NONE) && ++ (flags != VCHI_FLAGS_BLOCK_UNTIL_OP_COMPLETE)); ++ ++ if (flags == VCHI_FLAGS_NONE) ++ if (vchiu_queue_is_empty(&service->queue)) ++ return -1; ++ ++ header = vchiu_queue_peek(&service->queue); ++ ++ *data = header->data; ++ *msg_size = header->size; ++ ++ return 0; ++} ++EXPORT_SYMBOL(vchi_msg_peek); ++ ++/*********************************************************** ++ * Name: vchi_msg_remove ++ * ++ * Arguments: const VCHI_SERVICE_HANDLE_T handle, ++ * ++ * Description: Routine to remove a message (after it has been read with ++ * vchi_msg_peek) ++ * ++ * Returns: int32_t - success == 0 ++ * ++ ***********************************************************/ ++int32_t vchi_msg_remove(VCHI_SERVICE_HANDLE_T handle) ++{ ++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle; ++ VCHIQ_HEADER_T *header; ++ ++ header = vchiu_queue_pop(&service->queue); ++ ++ vchiq_release_message(service->handle, header); ++ ++ return 0; ++} ++EXPORT_SYMBOL(vchi_msg_remove); ++ ++/*********************************************************** ++ * Name: vchi_msg_queue ++ * ++ * Arguments: VCHI_SERVICE_HANDLE_T handle, ++ * const void *data, ++ * uint32_t data_size, ++ * VCHI_FLAGS_T flags, ++ * void *msg_handle, ++ * ++ * Description: Thin wrapper to queue a message onto a connection ++ * ++ * Returns: int32_t - success == 0 ++ * ++ ***********************************************************/ ++int32_t vchi_msg_queue(VCHI_SERVICE_HANDLE_T handle, ++ const void *data, ++ uint32_t data_size, ++ VCHI_FLAGS_T flags, ++ void *msg_handle) ++{ ++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle; ++ VCHIQ_ELEMENT_T element = {data, data_size}; ++ VCHIQ_STATUS_T status; ++ ++ (void)msg_handle; ++ ++ WARN_ON(flags != VCHI_FLAGS_BLOCK_UNTIL_QUEUED); ++ ++ status = vchiq_queue_message(service->handle, &element, 1); ++ ++ /* vchiq_queue_message() may return VCHIQ_RETRY, so we need to ++ ** implement a retry mechanism since this function is supposed ++ ** to block until queued ++ */ ++ while (status == VCHIQ_RETRY) { ++ msleep(1); ++ status = vchiq_queue_message(service->handle, &element, 1); ++ } ++ ++ return vchiq_status_to_vchi(status); ++} ++EXPORT_SYMBOL(vchi_msg_queue); ++ ++/*********************************************************** ++ * Name: vchi_bulk_queue_receive ++ * ++ * Arguments: VCHI_BULK_HANDLE_T handle, ++ * void *data_dst, ++ * const uint32_t data_size, ++ * VCHI_FLAGS_T flags ++ * void *bulk_handle ++ * ++ * Description: Routine to setup a rcv buffer ++ * ++ * Returns: int32_t - success == 0 ++ * ++ ***********************************************************/ ++int32_t vchi_bulk_queue_receive(VCHI_SERVICE_HANDLE_T handle, ++ void *data_dst, ++ uint32_t data_size, ++ VCHI_FLAGS_T flags, ++ void *bulk_handle) ++{ ++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle; ++ VCHIQ_BULK_MODE_T mode; ++ VCHIQ_STATUS_T status; ++ ++ switch ((int)flags) { ++ case VCHI_FLAGS_CALLBACK_WHEN_OP_COMPLETE ++ | VCHI_FLAGS_BLOCK_UNTIL_QUEUED: ++ WARN_ON(!service->callback); ++ mode = VCHIQ_BULK_MODE_CALLBACK; ++ break; ++ case VCHI_FLAGS_BLOCK_UNTIL_OP_COMPLETE: ++ mode = VCHIQ_BULK_MODE_BLOCKING; ++ break; ++ case VCHI_FLAGS_BLOCK_UNTIL_QUEUED: ++ case VCHI_FLAGS_NONE: ++ mode = VCHIQ_BULK_MODE_NOCALLBACK; ++ break; ++ default: ++ WARN(1, "unsupported message\n"); ++ return vchiq_status_to_vchi(VCHIQ_ERROR); ++ } ++ ++ status = vchiq_bulk_receive(service->handle, data_dst, data_size, ++ bulk_handle, mode); ++ ++ /* vchiq_bulk_receive() may return VCHIQ_RETRY, so we need to ++ ** implement a retry mechanism since this function is supposed ++ ** to block until queued ++ */ ++ while (status == VCHIQ_RETRY) { ++ msleep(1); ++ status = vchiq_bulk_receive(service->handle, data_dst, ++ data_size, bulk_handle, mode); ++ } ++ ++ return vchiq_status_to_vchi(status); ++} ++EXPORT_SYMBOL(vchi_bulk_queue_receive); ++ ++/*********************************************************** ++ * Name: vchi_bulk_queue_transmit ++ * ++ * Arguments: VCHI_BULK_HANDLE_T handle, ++ * const void *data_src, ++ * uint32_t data_size, ++ * VCHI_FLAGS_T flags, ++ * void *bulk_handle ++ * ++ * Description: Routine to transmit some data ++ * ++ * Returns: int32_t - success == 0 ++ * ++ ***********************************************************/ ++int32_t vchi_bulk_queue_transmit(VCHI_SERVICE_HANDLE_T handle, ++ const void *data_src, ++ uint32_t data_size, ++ VCHI_FLAGS_T flags, ++ void *bulk_handle) ++{ ++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle; ++ VCHIQ_BULK_MODE_T mode; ++ VCHIQ_STATUS_T status; ++ ++ switch ((int)flags) { ++ case VCHI_FLAGS_CALLBACK_WHEN_OP_COMPLETE ++ | VCHI_FLAGS_BLOCK_UNTIL_QUEUED: ++ WARN_ON(!service->callback); ++ mode = VCHIQ_BULK_MODE_CALLBACK; ++ break; ++ case VCHI_FLAGS_BLOCK_UNTIL_DATA_READ: ++ case VCHI_FLAGS_BLOCK_UNTIL_OP_COMPLETE: ++ mode = VCHIQ_BULK_MODE_BLOCKING; ++ break; ++ case VCHI_FLAGS_BLOCK_UNTIL_QUEUED: ++ case VCHI_FLAGS_NONE: ++ mode = VCHIQ_BULK_MODE_NOCALLBACK; ++ break; ++ default: ++ WARN(1, "unsupported message\n"); ++ return vchiq_status_to_vchi(VCHIQ_ERROR); ++ } ++ ++ status = vchiq_bulk_transmit(service->handle, data_src, data_size, ++ bulk_handle, mode); ++ ++ /* vchiq_bulk_transmit() may return VCHIQ_RETRY, so we need to ++ ** implement a retry mechanism since this function is supposed ++ ** to block until queued ++ */ ++ while (status == VCHIQ_RETRY) { ++ msleep(1); ++ status = vchiq_bulk_transmit(service->handle, data_src, ++ data_size, bulk_handle, mode); ++ } ++ ++ return vchiq_status_to_vchi(status); ++} ++EXPORT_SYMBOL(vchi_bulk_queue_transmit); ++ ++/*********************************************************** ++ * Name: vchi_msg_dequeue ++ * ++ * Arguments: VCHI_SERVICE_HANDLE_T handle, ++ * void *data, ++ * uint32_t max_data_size_to_read, ++ * uint32_t *actual_msg_size ++ * VCHI_FLAGS_T flags ++ * ++ * Description: Routine to dequeue a message into the supplied buffer ++ * ++ * Returns: int32_t - success == 0 ++ * ++ ***********************************************************/ ++int32_t vchi_msg_dequeue(VCHI_SERVICE_HANDLE_T handle, ++ void *data, ++ uint32_t max_data_size_to_read, ++ uint32_t *actual_msg_size, ++ VCHI_FLAGS_T flags) ++{ ++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle; ++ VCHIQ_HEADER_T *header; ++ ++ WARN_ON((flags != VCHI_FLAGS_NONE) && ++ (flags != VCHI_FLAGS_BLOCK_UNTIL_OP_COMPLETE)); ++ ++ if (flags == VCHI_FLAGS_NONE) ++ if (vchiu_queue_is_empty(&service->queue)) ++ return -1; ++ ++ header = vchiu_queue_pop(&service->queue); ++ ++ memcpy(data, header->data, header->size < max_data_size_to_read ? ++ header->size : max_data_size_to_read); ++ ++ *actual_msg_size = header->size; ++ ++ vchiq_release_message(service->handle, header); ++ ++ return 0; ++} ++EXPORT_SYMBOL(vchi_msg_dequeue); ++ ++/*********************************************************** ++ * Name: vchi_msg_queuev ++ * ++ * Arguments: VCHI_SERVICE_HANDLE_T handle, ++ * VCHI_MSG_VECTOR_T *vector, ++ * uint32_t count, ++ * VCHI_FLAGS_T flags, ++ * void *msg_handle ++ * ++ * Description: Thin wrapper to queue a message onto a connection ++ * ++ * Returns: int32_t - success == 0 ++ * ++ ***********************************************************/ ++ ++vchiq_static_assert(sizeof(VCHI_MSG_VECTOR_T) == sizeof(VCHIQ_ELEMENT_T)); ++vchiq_static_assert(offsetof(VCHI_MSG_VECTOR_T, vec_base) == ++ offsetof(VCHIQ_ELEMENT_T, data)); ++vchiq_static_assert(offsetof(VCHI_MSG_VECTOR_T, vec_len) == ++ offsetof(VCHIQ_ELEMENT_T, size)); ++ ++int32_t vchi_msg_queuev(VCHI_SERVICE_HANDLE_T handle, ++ VCHI_MSG_VECTOR_T *vector, ++ uint32_t count, ++ VCHI_FLAGS_T flags, ++ void *msg_handle) ++{ ++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle; ++ ++ (void)msg_handle; ++ ++ WARN_ON(flags != VCHI_FLAGS_BLOCK_UNTIL_QUEUED); ++ ++ return vchiq_status_to_vchi(vchiq_queue_message(service->handle, ++ (const VCHIQ_ELEMENT_T *)vector, count)); ++} ++EXPORT_SYMBOL(vchi_msg_queuev); ++ ++/*********************************************************** ++ * Name: vchi_held_msg_release ++ * ++ * Arguments: VCHI_HELD_MSG_T *message ++ * ++ * Description: Routine to release a held message (after it has been read with ++ * vchi_msg_hold) ++ * ++ * Returns: int32_t - success == 0 ++ * ++ ***********************************************************/ ++int32_t vchi_held_msg_release(VCHI_HELD_MSG_T *message) ++{ ++ vchiq_release_message((VCHIQ_SERVICE_HANDLE_T)message->service, ++ (VCHIQ_HEADER_T *)message->message); ++ ++ return 0; ++} ++EXPORT_SYMBOL(vchi_held_msg_release); ++ ++/*********************************************************** ++ * Name: vchi_msg_hold ++ * ++ * Arguments: VCHI_SERVICE_HANDLE_T handle, ++ * void **data, ++ * uint32_t *msg_size, ++ * VCHI_FLAGS_T flags, ++ * VCHI_HELD_MSG_T *message_handle ++ * ++ * Description: Routine to return a pointer to the current message (to allow ++ * in place processing). The message is dequeued - don't forget ++ * to release the message using vchi_held_msg_release when you're ++ * finished. ++ * ++ * Returns: int32_t - success == 0 ++ * ++ ***********************************************************/ ++int32_t vchi_msg_hold(VCHI_SERVICE_HANDLE_T handle, ++ void **data, ++ uint32_t *msg_size, ++ VCHI_FLAGS_T flags, ++ VCHI_HELD_MSG_T *message_handle) ++{ ++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle; ++ VCHIQ_HEADER_T *header; ++ ++ WARN_ON((flags != VCHI_FLAGS_NONE) && ++ (flags != VCHI_FLAGS_BLOCK_UNTIL_OP_COMPLETE)); ++ ++ if (flags == VCHI_FLAGS_NONE) ++ if (vchiu_queue_is_empty(&service->queue)) ++ return -1; ++ ++ header = vchiu_queue_pop(&service->queue); ++ ++ *data = header->data; ++ *msg_size = header->size; ++ ++ message_handle->service = ++ (struct opaque_vchi_service_t *)service->handle; ++ message_handle->message = header; ++ ++ return 0; ++} ++EXPORT_SYMBOL(vchi_msg_hold); ++ ++/*********************************************************** ++ * Name: vchi_initialise ++ * ++ * Arguments: VCHI_INSTANCE_T *instance_handle ++ * ++ * Description: Initialises the hardware but does not transmit anything ++ * When run as a Host App this will be called twice hence the need ++ * to malloc the state information ++ * ++ * Returns: 0 if successful, failure otherwise ++ * ++ ***********************************************************/ ++ ++int32_t vchi_initialise(VCHI_INSTANCE_T *instance_handle) ++{ ++ VCHIQ_INSTANCE_T instance; ++ VCHIQ_STATUS_T status; ++ ++ status = vchiq_initialise(&instance); ++ ++ *instance_handle = (VCHI_INSTANCE_T)instance; ++ ++ return vchiq_status_to_vchi(status); ++} ++EXPORT_SYMBOL(vchi_initialise); ++ ++/*********************************************************** ++ * Name: vchi_connect ++ * ++ * Arguments: VCHI_CONNECTION_T **connections ++ * const uint32_t num_connections ++ * VCHI_INSTANCE_T instance_handle) ++ * ++ * Description: Starts the command service on each connection, ++ * causing INIT messages to be pinged back and forth ++ * ++ * Returns: 0 if successful, failure otherwise ++ * ++ ***********************************************************/ ++int32_t vchi_connect(VCHI_CONNECTION_T **connections, ++ const uint32_t num_connections, ++ VCHI_INSTANCE_T instance_handle) ++{ ++ VCHIQ_INSTANCE_T instance = (VCHIQ_INSTANCE_T)instance_handle; ++ ++ (void)connections; ++ (void)num_connections; ++ ++ return vchiq_connect(instance); ++} ++EXPORT_SYMBOL(vchi_connect); ++ ++ ++/*********************************************************** ++ * Name: vchi_disconnect ++ * ++ * Arguments: VCHI_INSTANCE_T instance_handle ++ * ++ * Description: Stops the command service on each connection, ++ * causing DE-INIT messages to be pinged back and forth ++ * ++ * Returns: 0 if successful, failure otherwise ++ * ++ ***********************************************************/ ++int32_t vchi_disconnect(VCHI_INSTANCE_T instance_handle) ++{ ++ VCHIQ_INSTANCE_T instance = (VCHIQ_INSTANCE_T)instance_handle; ++ return vchiq_status_to_vchi(vchiq_shutdown(instance)); ++} ++EXPORT_SYMBOL(vchi_disconnect); ++ ++ ++/*********************************************************** ++ * Name: vchi_service_open ++ * Name: vchi_service_create ++ * ++ * Arguments: VCHI_INSTANCE_T *instance_handle ++ * SERVICE_CREATION_T *setup, ++ * VCHI_SERVICE_HANDLE_T *handle ++ * ++ * Description: Routine to open a service ++ * ++ * Returns: int32_t - success == 0 ++ * ++ ***********************************************************/ ++ ++static VCHIQ_STATUS_T shim_callback(VCHIQ_REASON_T reason, ++ VCHIQ_HEADER_T *header, VCHIQ_SERVICE_HANDLE_T handle, void *bulk_user) ++{ ++ SHIM_SERVICE_T *service = ++ (SHIM_SERVICE_T *)VCHIQ_GET_SERVICE_USERDATA(handle); ++ ++ if (!service->callback) ++ goto release; ++ ++ switch (reason) { ++ case VCHIQ_MESSAGE_AVAILABLE: ++ vchiu_queue_push(&service->queue, header); ++ ++ service->callback(service->callback_param, ++ VCHI_CALLBACK_MSG_AVAILABLE, NULL); ++ ++ goto done; ++ break; ++ ++ case VCHIQ_BULK_TRANSMIT_DONE: ++ service->callback(service->callback_param, ++ VCHI_CALLBACK_BULK_SENT, bulk_user); ++ break; ++ ++ case VCHIQ_BULK_RECEIVE_DONE: ++ service->callback(service->callback_param, ++ VCHI_CALLBACK_BULK_RECEIVED, bulk_user); ++ break; ++ ++ case VCHIQ_SERVICE_CLOSED: ++ service->callback(service->callback_param, ++ VCHI_CALLBACK_SERVICE_CLOSED, NULL); ++ break; ++ ++ case VCHIQ_SERVICE_OPENED: ++ /* No equivalent VCHI reason */ ++ break; ++ ++ case VCHIQ_BULK_TRANSMIT_ABORTED: ++ service->callback(service->callback_param, ++ VCHI_CALLBACK_BULK_TRANSMIT_ABORTED, ++ bulk_user); ++ break; ++ ++ case VCHIQ_BULK_RECEIVE_ABORTED: ++ service->callback(service->callback_param, ++ VCHI_CALLBACK_BULK_RECEIVE_ABORTED, ++ bulk_user); ++ break; ++ ++ default: ++ WARN(1, "not supported\n"); ++ break; ++ } ++ ++release: ++ vchiq_release_message(service->handle, header); ++done: ++ return VCHIQ_SUCCESS; ++} ++ ++static SHIM_SERVICE_T *service_alloc(VCHIQ_INSTANCE_T instance, ++ SERVICE_CREATION_T *setup) ++{ ++ SHIM_SERVICE_T *service = kzalloc(sizeof(SHIM_SERVICE_T), GFP_KERNEL); ++ ++ (void)instance; ++ ++ if (service) { ++ if (vchiu_queue_init(&service->queue, 64)) { ++ service->callback = setup->callback; ++ service->callback_param = setup->callback_param; ++ } else { ++ kfree(service); ++ service = NULL; ++ } ++ } ++ ++ return service; ++} ++ ++static void service_free(SHIM_SERVICE_T *service) ++{ ++ if (service) { ++ vchiu_queue_delete(&service->queue); ++ kfree(service); ++ } ++} ++ ++int32_t vchi_service_open(VCHI_INSTANCE_T instance_handle, ++ SERVICE_CREATION_T *setup, ++ VCHI_SERVICE_HANDLE_T *handle) ++{ ++ VCHIQ_INSTANCE_T instance = (VCHIQ_INSTANCE_T)instance_handle; ++ SHIM_SERVICE_T *service = service_alloc(instance, setup); ++ ++ *handle = (VCHI_SERVICE_HANDLE_T)service; ++ ++ if (service) { ++ VCHIQ_SERVICE_PARAMS_T params; ++ VCHIQ_STATUS_T status; ++ ++ memset(¶ms, 0, sizeof(params)); ++ params.fourcc = setup->service_id; ++ params.callback = shim_callback; ++ params.userdata = service; ++ params.version = setup->version.version; ++ params.version_min = setup->version.version_min; ++ ++ status = vchiq_open_service(instance, ¶ms, ++ &service->handle); ++ if (status != VCHIQ_SUCCESS) { ++ service_free(service); ++ service = NULL; ++ *handle = NULL; ++ } ++ } ++ ++ return (service != NULL) ? 0 : -1; ++} ++EXPORT_SYMBOL(vchi_service_open); ++ ++int32_t vchi_service_create(VCHI_INSTANCE_T instance_handle, ++ SERVICE_CREATION_T *setup, ++ VCHI_SERVICE_HANDLE_T *handle) ++{ ++ VCHIQ_INSTANCE_T instance = (VCHIQ_INSTANCE_T)instance_handle; ++ SHIM_SERVICE_T *service = service_alloc(instance, setup); ++ ++ *handle = (VCHI_SERVICE_HANDLE_T)service; ++ ++ if (service) { ++ VCHIQ_SERVICE_PARAMS_T params; ++ VCHIQ_STATUS_T status; ++ ++ memset(¶ms, 0, sizeof(params)); ++ params.fourcc = setup->service_id; ++ params.callback = shim_callback; ++ params.userdata = service; ++ params.version = setup->version.version; ++ params.version_min = setup->version.version_min; ++ status = vchiq_add_service(instance, ¶ms, &service->handle); ++ ++ if (status != VCHIQ_SUCCESS) { ++ service_free(service); ++ service = NULL; ++ *handle = NULL; ++ } ++ } ++ ++ return (service != NULL) ? 0 : -1; ++} ++EXPORT_SYMBOL(vchi_service_create); ++ ++int32_t vchi_service_close(const VCHI_SERVICE_HANDLE_T handle) ++{ ++ int32_t ret = -1; ++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle; ++ if (service) { ++ VCHIQ_STATUS_T status = vchiq_close_service(service->handle); ++ if (status == VCHIQ_SUCCESS) { ++ service_free(service); ++ service = NULL; ++ } ++ ++ ret = vchiq_status_to_vchi(status); ++ } ++ return ret; ++} ++EXPORT_SYMBOL(vchi_service_close); ++ ++int32_t vchi_service_destroy(const VCHI_SERVICE_HANDLE_T handle) ++{ ++ int32_t ret = -1; ++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle; ++ if (service) { ++ VCHIQ_STATUS_T status = vchiq_remove_service(service->handle); ++ if (status == VCHIQ_SUCCESS) { ++ service_free(service); ++ service = NULL; ++ } ++ ++ ret = vchiq_status_to_vchi(status); ++ } ++ return ret; ++} ++EXPORT_SYMBOL(vchi_service_destroy); ++ ++int32_t vchi_service_set_option(const VCHI_SERVICE_HANDLE_T handle, ++ VCHI_SERVICE_OPTION_T option, ++ int value) ++{ ++ int32_t ret = -1; ++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle; ++ VCHIQ_SERVICE_OPTION_T vchiq_option; ++ switch (option) { ++ case VCHI_SERVICE_OPTION_TRACE: ++ vchiq_option = VCHIQ_SERVICE_OPTION_TRACE; ++ break; ++ case VCHI_SERVICE_OPTION_SYNCHRONOUS: ++ vchiq_option = VCHIQ_SERVICE_OPTION_SYNCHRONOUS; ++ break; ++ default: ++ service = NULL; ++ break; ++ } ++ if (service) { ++ VCHIQ_STATUS_T status = ++ vchiq_set_service_option(service->handle, ++ vchiq_option, ++ value); ++ ++ ret = vchiq_status_to_vchi(status); ++ } ++ return ret; ++} ++EXPORT_SYMBOL(vchi_service_set_option); ++ ++int32_t vchi_get_peer_version( const VCHI_SERVICE_HANDLE_T handle, short *peer_version ) ++{ ++ int32_t ret = -1; ++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle; ++ if(service) ++ { ++ VCHIQ_STATUS_T status = vchiq_get_peer_version(service->handle, peer_version); ++ ret = vchiq_status_to_vchi( status ); ++ } ++ return ret; ++} ++EXPORT_SYMBOL(vchi_get_peer_version); ++ ++/* ---------------------------------------------------------------------- ++ * read a uint32_t from buffer. ++ * network format is defined to be little endian ++ * -------------------------------------------------------------------- */ ++uint32_t ++vchi_readbuf_uint32(const void *_ptr) ++{ ++ const unsigned char *ptr = _ptr; ++ return ptr[0] | (ptr[1] << 8) | (ptr[2] << 16) | (ptr[3] << 24); ++} ++ ++/* ---------------------------------------------------------------------- ++ * write a uint32_t to buffer. ++ * network format is defined to be little endian ++ * -------------------------------------------------------------------- */ ++void ++vchi_writebuf_uint32(void *_ptr, uint32_t value) ++{ ++ unsigned char *ptr = _ptr; ++ ptr[0] = (unsigned char)((value >> 0) & 0xFF); ++ ptr[1] = (unsigned char)((value >> 8) & 0xFF); ++ ptr[2] = (unsigned char)((value >> 16) & 0xFF); ++ ptr[3] = (unsigned char)((value >> 24) & 0xFF); ++} ++ ++/* ---------------------------------------------------------------------- ++ * read a uint16_t from buffer. ++ * network format is defined to be little endian ++ * -------------------------------------------------------------------- */ ++uint16_t ++vchi_readbuf_uint16(const void *_ptr) ++{ ++ const unsigned char *ptr = _ptr; ++ return ptr[0] | (ptr[1] << 8); ++} ++ ++/* ---------------------------------------------------------------------- ++ * write a uint16_t into the buffer. ++ * network format is defined to be little endian ++ * -------------------------------------------------------------------- */ ++void ++vchi_writebuf_uint16(void *_ptr, uint16_t value) ++{ ++ unsigned char *ptr = _ptr; ++ ptr[0] = (value >> 0) & 0xFF; ++ ptr[1] = (value >> 8) & 0xFF; ++} ++ ++/*********************************************************** ++ * Name: vchi_service_use ++ * ++ * Arguments: const VCHI_SERVICE_HANDLE_T handle ++ * ++ * Description: Routine to increment refcount on a service ++ * ++ * Returns: void ++ * ++ ***********************************************************/ ++int32_t vchi_service_use(const VCHI_SERVICE_HANDLE_T handle) ++{ ++ int32_t ret = -1; ++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle; ++ if (service) ++ ret = vchiq_status_to_vchi(vchiq_use_service(service->handle)); ++ return ret; ++} ++EXPORT_SYMBOL(vchi_service_use); ++ ++/*********************************************************** ++ * Name: vchi_service_release ++ * ++ * Arguments: const VCHI_SERVICE_HANDLE_T handle ++ * ++ * Description: Routine to decrement refcount on a service ++ * ++ * Returns: void ++ * ++ ***********************************************************/ ++int32_t vchi_service_release(const VCHI_SERVICE_HANDLE_T handle) ++{ ++ int32_t ret = -1; ++ SHIM_SERVICE_T *service = (SHIM_SERVICE_T *)handle; ++ if (service) ++ ret = vchiq_status_to_vchi( ++ vchiq_release_service(service->handle)); ++ return ret; ++} ++EXPORT_SYMBOL(vchi_service_release); +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_util.c +@@ -0,0 +1,156 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#include "vchiq_util.h" ++#include "vchiq_killable.h" ++ ++static inline int is_pow2(int i) ++{ ++ return i && !(i & (i - 1)); ++} ++ ++int vchiu_queue_init(VCHIU_QUEUE_T *queue, int size) ++{ ++ WARN_ON(!is_pow2(size)); ++ ++ queue->size = size; ++ queue->read = 0; ++ queue->write = 0; ++ queue->initialized = 1; ++ ++ sema_init(&queue->pop, 0); ++ sema_init(&queue->push, 0); ++ ++ queue->storage = kzalloc(size * sizeof(VCHIQ_HEADER_T *), GFP_KERNEL); ++ if (queue->storage == NULL) { ++ vchiu_queue_delete(queue); ++ return 0; ++ } ++ return 1; ++} ++ ++void vchiu_queue_delete(VCHIU_QUEUE_T *queue) ++{ ++ if (queue->storage != NULL) ++ kfree(queue->storage); ++} ++ ++int vchiu_queue_is_empty(VCHIU_QUEUE_T *queue) ++{ ++ return queue->read == queue->write; ++} ++ ++int vchiu_queue_is_full(VCHIU_QUEUE_T *queue) ++{ ++ return queue->write == queue->read + queue->size; ++} ++ ++void vchiu_queue_push(VCHIU_QUEUE_T *queue, VCHIQ_HEADER_T *header) ++{ ++ if (!queue->initialized) ++ return; ++ ++ while (queue->write == queue->read + queue->size) { ++ if (down_interruptible(&queue->pop) != 0) { ++ flush_signals(current); ++ } ++ } ++ ++ /* ++ * Write to queue->storage must be visible after read from ++ * queue->read ++ */ ++ smp_mb(); ++ ++ queue->storage[queue->write & (queue->size - 1)] = header; ++ ++ /* ++ * Write to queue->storage must be visible before write to ++ * queue->write ++ */ ++ smp_wmb(); ++ ++ queue->write++; ++ ++ up(&queue->push); ++} ++ ++VCHIQ_HEADER_T *vchiu_queue_peek(VCHIU_QUEUE_T *queue) ++{ ++ while (queue->write == queue->read) { ++ if (down_interruptible(&queue->push) != 0) { ++ flush_signals(current); ++ } ++ } ++ ++ up(&queue->push); // We haven't removed anything from the queue. ++ ++ /* ++ * Read from queue->storage must be visible after read from ++ * queue->write ++ */ ++ smp_rmb(); ++ ++ return queue->storage[queue->read & (queue->size - 1)]; ++} ++ ++VCHIQ_HEADER_T *vchiu_queue_pop(VCHIU_QUEUE_T *queue) ++{ ++ VCHIQ_HEADER_T *header; ++ ++ while (queue->write == queue->read) { ++ if (down_interruptible(&queue->push) != 0) { ++ flush_signals(current); ++ } ++ } ++ ++ /* ++ * Read from queue->storage must be visible after read from ++ * queue->write ++ */ ++ smp_rmb(); ++ ++ header = queue->storage[queue->read & (queue->size - 1)]; ++ ++ /* ++ * Read from queue->storage must be visible before write to ++ * queue->read ++ */ ++ smp_mb(); ++ ++ queue->read++; ++ ++ up(&queue->pop); ++ ++ return header; ++} +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_util.h +@@ -0,0 +1,82 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++ ++#ifndef VCHIQ_UTIL_H ++#define VCHIQ_UTIL_H ++ ++#include <linux/types.h> ++#include <linux/semaphore.h> ++#include <linux/mutex.h> ++#include <linux/bitops.h> ++#include <linux/kthread.h> ++#include <linux/wait.h> ++#include <linux/vmalloc.h> ++#include <linux/jiffies.h> ++#include <linux/delay.h> ++#include <linux/string.h> ++#include <linux/types.h> ++#include <linux/interrupt.h> ++#include <linux/random.h> ++#include <linux/sched.h> ++#include <linux/ctype.h> ++#include <linux/uaccess.h> ++#include <linux/time.h> /* for time_t */ ++#include <linux/slab.h> ++#include <linux/vmalloc.h> ++ ++#include "vchiq_if.h" ++ ++typedef struct { ++ int size; ++ int read; ++ int write; ++ int initialized; ++ ++ struct semaphore pop; ++ struct semaphore push; ++ ++ VCHIQ_HEADER_T **storage; ++} VCHIU_QUEUE_T; ++ ++extern int vchiu_queue_init(VCHIU_QUEUE_T *queue, int size); ++extern void vchiu_queue_delete(VCHIU_QUEUE_T *queue); ++ ++extern int vchiu_queue_is_empty(VCHIU_QUEUE_T *queue); ++extern int vchiu_queue_is_full(VCHIU_QUEUE_T *queue); ++ ++extern void vchiu_queue_push(VCHIU_QUEUE_T *queue, VCHIQ_HEADER_T *header); ++ ++extern VCHIQ_HEADER_T *vchiu_queue_peek(VCHIU_QUEUE_T *queue); ++extern VCHIQ_HEADER_T *vchiu_queue_pop(VCHIU_QUEUE_T *queue); ++ ++#endif +--- /dev/null ++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_version.c +@@ -0,0 +1,59 @@ ++/** ++ * Copyright (c) 2010-2012 Broadcom. All rights reserved. ++ * ++ * Redistribution and use in source and binary forms, with or without ++ * modification, are permitted provided that the following conditions ++ * are met: ++ * 1. Redistributions of source code must retain the above copyright ++ * notice, this list of conditions, and the following disclaimer, ++ * without modification. ++ * 2. Redistributions in binary form must reproduce the above copyright ++ * notice, this list of conditions and the following disclaimer in the ++ * documentation and/or other materials provided with the distribution. ++ * 3. The names of the above-listed copyright holders may not be used ++ * to endorse or promote products derived from this software without ++ * specific prior written permission. ++ * ++ * ALTERNATIVELY, this software may be distributed under the terms of the ++ * GNU General Public License ("GPL") version 2, as published by the Free ++ * Software Foundation. ++ * ++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS ++ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, ++ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR ++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR ++ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, ++ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ++ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR ++ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ++ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ++ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ++ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ++ */ ++#include "vchiq_build_info.h" ++#include <linux/broadcom/vc_debug_sym.h> ++ ++VC_DEBUG_DECLARE_STRING_VAR( vchiq_build_hostname, "dc4-arm-01" ); ++VC_DEBUG_DECLARE_STRING_VAR( vchiq_build_version, "9245b4c35b99b3870e1f7dc598c5692b3c66a6f0 (tainted)" ); ++VC_DEBUG_DECLARE_STRING_VAR( vchiq_build_time, __TIME__ ); ++VC_DEBUG_DECLARE_STRING_VAR( vchiq_build_date, __DATE__ ); ++ ++const char *vchiq_get_build_hostname( void ) ++{ ++ return vchiq_build_hostname; ++} ++ ++const char *vchiq_get_build_version( void ) ++{ ++ return vchiq_build_version; ++} ++ ++const char *vchiq_get_build_date( void ) ++{ ++ return vchiq_build_date; ++} ++ ++const char *vchiq_get_build_time( void ) ++{ ++ return vchiq_build_time; ++} |