diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.1/0012-bcm2708-vchiq-driver.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.1/0012-bcm2708-vchiq-driver.patch | 13145 |
1 files changed, 0 insertions, 13145 deletions
diff --git a/target/linux/brcm2708/patches-4.1/0012-bcm2708-vchiq-driver.patch b/target/linux/brcm2708/patches-4.1/0012-bcm2708-vchiq-driver.patch deleted file mode 100644 index 66993ea25a..0000000000 --- a/target/linux/brcm2708/patches-4.1/0012-bcm2708-vchiq-driver.patch +++ /dev/null @@ -1,13145 +0,0 @@ -From db0e89bf265b028b37cd187ca81cda2ffa1d86bd Mon Sep 17 00:00:00 2001 -From: popcornmix <popcornmix@gmail.com> -Date: Tue, 2 Jul 2013 23:42:01 +0100 -Subject: [PATCH 012/222] 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 ---- - arch/arm/mach-bcm2708/bcm2708.c | 26 + - arch/arm/mach-bcm2708/include/mach/platform.h | 2 + - arch/arm/mach-bcm2709/bcm2709.c | 26 + - 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 | 547 +++ - .../vc04_services/interface/vchiq_arm/vchiq_arm.c | 2886 ++++++++++++++ - .../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 | 152 + - .../vc04_services/interface/vchiq_arm/vchiq_util.h | 81 + - .../interface/vchiq_arm/vchiq_version.c | 59 + - 39 files changed, 12810 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/bcm2708.c -+++ b/arch/arm/mach-bcm2708/bcm2708.c -@@ -376,6 +376,31 @@ static struct platform_device bcm2708_vc - }, - }; - -+static struct resource bcm2708_vchiq_resources[] = { -+ { -+ .start = ARMCTRL_0_BELL_BASE, -+ .end = ARMCTRL_0_BELL_BASE + 16, -+ .flags = IORESOURCE_MEM, -+ }, { -+ .start = IRQ_ARM_DOORBELL_0, -+ .end = IRQ_ARM_DOORBELL_0, -+ .flags = IORESOURCE_IRQ, -+ }, -+}; -+ -+static u64 vchiq_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON); -+ -+static struct platform_device bcm2708_vchiq_device = { -+ .name = "bcm2835_vchiq", -+ .id = -1, -+ .resource = bcm2708_vchiq_resources, -+ .num_resources = ARRAY_SIZE(bcm2708_vchiq_resources), -+ .dev = { -+ .dma_mask = &vchiq_dmamask, -+ .coherent_dma_mask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON), -+ }, -+}; -+ - #ifdef CONFIG_BCM2708_GPIO - #define BCM_GPIO_DRIVER_NAME "bcm2708_gpio" - -@@ -611,6 +636,7 @@ void __init bcm2708_init(void) - - bcm_register_device_dt(&bcm2708_dmaengine_device); - bcm_register_device(&bcm2708_vcio_device); -+ bcm_register_device_dt(&bcm2708_vchiq_device); - #ifdef CONFIG_BCM2708_GPIO - bcm_register_device_dt(&bcm2708_gpio_device); - #endif ---- a/arch/arm/mach-bcm2708/include/mach/platform.h -+++ b/arch/arm/mach-bcm2708/include/mach/platform.h -@@ -81,6 +81,8 @@ - #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 */ - - - /* ---- a/arch/arm/mach-bcm2709/bcm2709.c -+++ b/arch/arm/mach-bcm2709/bcm2709.c -@@ -396,6 +396,31 @@ static struct platform_device bcm2708_vc - }, - }; - -+static struct resource bcm2708_vchiq_resources[] = { -+ { -+ .start = ARMCTRL_0_BELL_BASE, -+ .end = ARMCTRL_0_BELL_BASE + 16, -+ .flags = IORESOURCE_MEM, -+ }, { -+ .start = IRQ_ARM_DOORBELL_0, -+ .end = IRQ_ARM_DOORBELL_0, -+ .flags = IORESOURCE_IRQ, -+ }, -+}; -+ -+static u64 vchiq_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON); -+ -+static struct platform_device bcm2708_vchiq_device = { -+ .name = "bcm2835_vchiq", -+ .id = -1, -+ .resource = bcm2708_vchiq_resources, -+ .num_resources = ARRAY_SIZE(bcm2708_vchiq_resources), -+ .dev = { -+ .dma_mask = &vchiq_dmamask, -+ .coherent_dma_mask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON), -+ }, -+}; -+ - #ifdef CONFIG_BCM2708_GPIO - #define BCM_GPIO_DRIVER_NAME "bcm2708_gpio" - -@@ -631,6 +656,7 @@ void __init bcm2709_init(void) - - bcm_register_device_dt(&bcm2708_dmaengine_device); - bcm_register_device(&bcm2708_vcio_device); -+ bcm_register_device_dt(&bcm2708_vchiq_device); - #ifdef CONFIG_BCM2708_GPIO - bcm_register_device_dt(&bcm2708_gpio_device); - #endif ---- a/arch/arm/mach-bcm2709/include/mach/platform.h -+++ b/arch/arm/mach-bcm2709/include/mach/platform.h -@@ -81,6 +81,8 @@ - #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 */ - - - /* ---- a/drivers/misc/Kconfig -+++ b/drivers/misc/Kconfig -@@ -524,6 +524,7 @@ source "drivers/misc/carma/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-$(CONFIG_ECHO) += echo/ ---- /dev/null -+++ b/drivers/misc/vc04_services/Kconfig -@@ -0,0 +1,9 @@ -+config BCM2708_VCHIQ -+ tristate "Videocore VCHIQ" -+ depends on (MACH_BCM2708 || MACH_BCM2709 || ARCH_BCM2835) && BCM2708_MBOX -+ default y -+ help -+ Kernel to VideoCore communication interface for the -+ BCM2708 family of products. -+ Defaults to Y when the Broadcom Videocore services -+ are included in the build, N otherwise. ---- /dev/null -+++ b/drivers/misc/vc04_services/Makefile -@@ -0,0 +1,14 @@ -+obj-$(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 +1,547 @@ -+/** -+ * 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_data/mailbox-bcm2708.h> -+#include <linux/platform_device.h> -+#include <linux/uaccess.h> -+#include <asm/pgtable.h> -+ -+#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 FRAGMENTS_T *g_fragments_base; -+static FRAGMENTS_T *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; -+ VCHIQ_SLOT_ZERO_T *vchiq_slot_zero; -+ struct resource *res; -+ void *slot_mem; -+ dma_addr_t slot_phys; -+ int slot_mem_size, frag_mem_size; -+ int err, irq, i; -+ -+ g_virt_to_bus_offset = virt_to_dma(dev, (void *)0); -+ -+ /* Allocate space for the channels in coherent memory */ -+ slot_mem_size = PAGE_ALIGN(TOTAL_SLOTS * VCHIQ_SLOT_SIZE); -+ frag_mem_size = PAGE_ALIGN(sizeof(FRAGMENTS_T) * 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 = (FRAGMENTS_T *)(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++) { -+ *(FRAGMENTS_T **)&g_fragments_base[i] = -+ &g_fragments_base[i + 1]; -+ } -+ *(FRAGMENTS_T **)&g_fragments_base[i] = 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 */ -+ -+ dsb(); /* Ensure all writes have completed */ -+ -+ err = bcm_mailbox_write(MBOX_CHAN_VCHIQ, (unsigned int)slot_phys); -+ if (err) { -+ dev_err(dev, "mailbox write failed\n"); -+ return err; -+ } -+ -+ 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 __virt_to_bus 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; -+ struct page *page; -+ 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)) { -+ for (actual_pages = 0; actual_pages < num_pages; actual_pages++) { -+ pages[actual_pages] = vmalloc_to_page(buf + (actual_pages * PAGE_SIZE)); -+ } -+ *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 & (CACHE_LINE_SIZE - 1)) || -+ ((pagelist->offset + pagelist->length) & -+ (CACHE_LINE_SIZE - 1)))) { -+ FRAGMENTS_T *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 = (FRAGMENTS_T *) g_free_fragments; -+ WARN_ON(fragments == NULL); -+ g_free_fragments = *(FRAGMENTS_T **) g_free_fragments; -+ up(&g_free_fragments_mutex); -+ pagelist->type = -+ PAGELIST_READ_WITH_FRAGMENTS + (fragments - -+ g_fragments_base); -+ } -+ -+ for (page = virt_to_page(pagelist); -+ page <= virt_to_page(addrs + num_pages - 1); page++) { -+ flush_dcache_page(page); -+ } -+ -+ *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) { -+ FRAGMENTS_T *fragments = g_fragments_base + -+ (pagelist->type - PAGELIST_READ_WITH_FRAGMENTS); -+ int head_bytes, tail_bytes; -+ head_bytes = (CACHE_LINE_SIZE - pagelist->offset) & -+ (CACHE_LINE_SIZE - 1); -+ tail_bytes = (pagelist->offset + actual) & -+ (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->headbuf, -+ 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) & ~(CACHE_LINE_SIZE - 1)), -+ fragments->tailbuf, tail_bytes); -+ } -+ -+ down(&g_free_fragments_mutex); -+ *(FRAGMENTS_T **) fragments = g_free_fragments; -+ g_free_fragments = fragments; -+ up(&g_free_fragments_mutex); -+ up(&g_free_fragments_sema); -+ } -+ -+ if (*need_release) { -+ for (i = 0; i < num_pages; i++) { -+ if (pagelist->type != PAGELIST_WRITE) -+ set_page_dirty(pages[i]); -+ -+ page_cache_release(pages[i]); -+ } -+ } -+ -+ kfree(pagelist); -+} ---- /dev/null -+++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_arm.c -@@ -0,0 +1,2886 @@ -+/** -+ * 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/platform_device.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) -+{ -+ int err; -+ void *ptr_err; -+ -+ /* 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 +1,152 @@ -+/** -+ * 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; -+ -+ 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) -+{ -+ 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 +1,81 @@ -+/** -+ * 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; -+ -+ 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; -+} |