diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.9/950-0037-cma-Add-vc_cma-driver-to-enable-use-of-CMA.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.9/950-0037-cma-Add-vc_cma-driver-to-enable-use-of-CMA.patch | 1319 |
1 files changed, 1319 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.9/950-0037-cma-Add-vc_cma-driver-to-enable-use-of-CMA.patch b/target/linux/brcm2708/patches-4.9/950-0037-cma-Add-vc_cma-driver-to-enable-use-of-CMA.patch new file mode 100644 index 0000000000..50bad76c51 --- /dev/null +++ b/target/linux/brcm2708/patches-4.9/950-0037-cma-Add-vc_cma-driver-to-enable-use-of-CMA.patch @@ -0,0 +1,1319 @@ +From 4d96064d4c95d73d22563cea403eccd72e7b0da0 Mon Sep 17 00:00:00 2001 +From: popcornmix <popcornmix@gmail.com> +Date: Wed, 3 Jul 2013 00:31:47 +0100 +Subject: [PATCH] cma: Add vc_cma driver to enable use of CMA +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Signed-off-by: popcornmix <popcornmix@gmail.com> + +vc_cma: Make the vc_cma area the default contiguous DMA area + +vc_cma: Provide empty functions when module is not built + +Providing empty functions saves the users from guarding the +function call with an #if clause. +Move __init markings from prototypes to functions. + +Signed-off-by: Noralf Trønnes <noralf@tronnes.org> +--- + drivers/char/Kconfig | 2 + + drivers/char/Makefile | 1 + + drivers/char/broadcom/Kconfig | 15 + + drivers/char/broadcom/Makefile | 1 + + drivers/char/broadcom/vc_cma/Makefile | 7 + + drivers/char/broadcom/vc_cma/vc_cma.c | 1193 +++++++++++++++++++++++++++++++++ + include/linux/broadcom/vc_cma.h | 36 + + 7 files changed, 1255 insertions(+) + create mode 100644 drivers/char/broadcom/Kconfig + create mode 100644 drivers/char/broadcom/Makefile + create mode 100644 drivers/char/broadcom/vc_cma/Makefile + create mode 100644 drivers/char/broadcom/vc_cma/vc_cma.c + create mode 100644 include/linux/broadcom/vc_cma.h + +--- a/drivers/char/Kconfig ++++ b/drivers/char/Kconfig +@@ -4,6 +4,8 @@ + + menu "Character devices" + ++source "drivers/char/broadcom/Kconfig" ++ + source "drivers/tty/Kconfig" + + config DEVMEM +--- a/drivers/char/Makefile ++++ b/drivers/char/Makefile +@@ -60,3 +60,4 @@ js-rtc-y = rtc.o + obj-$(CONFIG_TILE_SROM) += tile-srom.o + obj-$(CONFIG_XILLYBUS) += xillybus/ + obj-$(CONFIG_POWERNV_OP_PANEL) += powernv-op-panel.o ++obj-$(CONFIG_BRCM_CHAR_DRIVERS) += broadcom/ +--- /dev/null ++++ b/drivers/char/broadcom/Kconfig +@@ -0,0 +1,15 @@ ++# ++# Broadcom char driver config ++# ++ ++menuconfig BRCM_CHAR_DRIVERS ++ bool "Broadcom Char Drivers" ++ help ++ Broadcom's char drivers ++ ++config BCM_VC_CMA ++ bool "Videocore CMA" ++ depends on CMA && BRCM_CHAR_DRIVERS && BCM2708_VCHIQ ++ default n ++ help ++ Helper for videocore CMA access. +--- /dev/null ++++ b/drivers/char/broadcom/Makefile +@@ -0,0 +1 @@ ++obj-$(CONFIG_BCM_VC_CMA) += vc_cma/ +--- /dev/null ++++ b/drivers/char/broadcom/vc_cma/Makefile +@@ -0,0 +1,7 @@ ++ccflags-$(CONFIG_BCM_VC_CMA) += -Wall -Wstrict-prototypes -Wno-trigraphs -Werror ++ccflags-$(CONFIG_BCM_VC_CMA) += -Iinclude/linux/broadcom -Idrivers/staging/vc04_services -Idrivers/staging/vc04_services/interface/vchi -Idrivers/staging/vc04_services/interface/vchiq_arm ++ccflags-$(CONFIG_BCM_VC_CMA) += -D__KERNEL__ -D__linux__ ++ ++obj-$(CONFIG_BCM_VC_CMA) += vc-cma.o ++ ++vc-cma-objs := vc_cma.o +--- /dev/null ++++ b/drivers/char/broadcom/vc_cma/vc_cma.c +@@ -0,0 +1,1193 @@ ++/** ++ * 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/kthread.h> ++#include <linux/fs.h> ++#include <linux/device.h> ++#include <linux/cdev.h> ++#include <linux/mm.h> ++#include <linux/proc_fs.h> ++#include <linux/seq_file.h> ++#include <linux/dma-mapping.h> ++#include <linux/dma-contiguous.h> ++#include <linux/platform_device.h> ++#include <linux/uaccess.h> ++#include <asm/cacheflush.h> ++ ++#include "vc_cma.h" ++ ++#include "vchiq_util.h" ++#include "vchiq_connected.h" ++//#include "debug_sym.h" ++//#include "vc_mem.h" ++ ++#define DRIVER_NAME "vc-cma" ++ ++#define LOG_DBG(fmt, ...) \ ++ if (vc_cma_debug) \ ++ printk(KERN_INFO fmt "\n", ##__VA_ARGS__) ++#define LOG_INFO(fmt, ...) \ ++ printk(KERN_INFO fmt "\n", ##__VA_ARGS__) ++#define LOG_ERR(fmt, ...) \ ++ printk(KERN_ERR fmt "\n", ##__VA_ARGS__) ++ ++#define VC_CMA_FOURCC VCHIQ_MAKE_FOURCC('C', 'M', 'A', ' ') ++#define VC_CMA_VERSION 2 ++ ++#define VC_CMA_CHUNK_ORDER 6 /* 256K */ ++#define VC_CMA_CHUNK_SIZE (4096 << VC_CMA_CHUNK_ORDER) ++#define VC_CMA_MAX_PARAMS_PER_MSG \ ++ ((VCHIQ_MAX_MSG_SIZE - sizeof(unsigned short))/sizeof(unsigned short)) ++#define VC_CMA_RESERVE_COUNT_MAX 16 ++ ++#define PAGES_PER_CHUNK (VC_CMA_CHUNK_SIZE / PAGE_SIZE) ++ ++#define VCADDR_TO_PHYSADDR(vcaddr) (mm_vc_mem_phys_addr + vcaddr) ++ ++#define loud_error(...) \ ++ LOG_ERR("===== " __VA_ARGS__) ++ ++enum { ++ VC_CMA_MSG_QUIT, ++ VC_CMA_MSG_OPEN, ++ VC_CMA_MSG_TICK, ++ VC_CMA_MSG_ALLOC, /* chunk count */ ++ VC_CMA_MSG_FREE, /* chunk, chunk, ... */ ++ VC_CMA_MSG_ALLOCATED, /* chunk, chunk, ... */ ++ VC_CMA_MSG_REQUEST_ALLOC, /* chunk count */ ++ VC_CMA_MSG_REQUEST_FREE, /* chunk count */ ++ VC_CMA_MSG_RESERVE, /* bytes lo, bytes hi */ ++ VC_CMA_MSG_UPDATE_RESERVE, ++ VC_CMA_MSG_MAX ++}; ++ ++struct cma_msg { ++ unsigned short type; ++ unsigned short params[VC_CMA_MAX_PARAMS_PER_MSG]; ++}; ++ ++struct vc_cma_reserve_user { ++ unsigned int pid; ++ unsigned int reserve; ++}; ++ ++/* Device (/dev) related variables */ ++static dev_t vc_cma_devnum; ++static struct class *vc_cma_class; ++static struct cdev vc_cma_cdev; ++static int vc_cma_inited; ++static int vc_cma_debug; ++ ++/* Proc entry */ ++static struct proc_dir_entry *vc_cma_proc_entry; ++ ++phys_addr_t vc_cma_base; ++struct page *vc_cma_base_page; ++unsigned int vc_cma_size; ++EXPORT_SYMBOL(vc_cma_size); ++unsigned int vc_cma_initial; ++unsigned int vc_cma_chunks; ++unsigned int vc_cma_chunks_used; ++unsigned int vc_cma_chunks_reserved; ++ ++ ++void *vc_cma_dma_alloc; ++unsigned int vc_cma_dma_size; ++ ++static int in_loud_error; ++ ++unsigned int vc_cma_reserve_total; ++unsigned int vc_cma_reserve_count; ++struct vc_cma_reserve_user vc_cma_reserve_users[VC_CMA_RESERVE_COUNT_MAX]; ++static DEFINE_SEMAPHORE(vc_cma_reserve_mutex); ++static DEFINE_SEMAPHORE(vc_cma_worker_queue_push_mutex); ++ ++static u64 vc_cma_dma_mask = DMA_BIT_MASK(32); ++static struct platform_device vc_cma_device = { ++ .name = "vc-cma", ++ .id = 0, ++ .dev = { ++ .dma_mask = &vc_cma_dma_mask, ++ .coherent_dma_mask = DMA_BIT_MASK(32), ++ }, ++}; ++ ++static VCHIQ_INSTANCE_T cma_instance; ++static VCHIQ_SERVICE_HANDLE_T cma_service; ++static VCHIU_QUEUE_T cma_msg_queue; ++static struct task_struct *cma_worker; ++ ++static int vc_cma_set_reserve(unsigned int reserve, unsigned int pid); ++static int vc_cma_alloc_chunks(int num_chunks, struct cma_msg *reply); ++static VCHIQ_STATUS_T cma_service_callback(VCHIQ_REASON_T reason, ++ VCHIQ_HEADER_T * header, ++ VCHIQ_SERVICE_HANDLE_T service, ++ void *bulk_userdata); ++static void send_vc_msg(unsigned short type, ++ unsigned short param1, unsigned short param2); ++static bool send_worker_msg(VCHIQ_HEADER_T * msg); ++ ++static int early_vc_cma_mem(char *p) ++{ ++ unsigned int new_size; ++ printk(KERN_NOTICE "early_vc_cma_mem(%s)", p); ++ vc_cma_size = memparse(p, &p); ++ vc_cma_initial = vc_cma_size; ++ if (*p == '/') ++ vc_cma_size = memparse(p + 1, &p); ++ if (*p == '@') ++ vc_cma_base = memparse(p + 1, &p); ++ ++ new_size = (vc_cma_size - ((-vc_cma_base) & (VC_CMA_CHUNK_SIZE - 1))) ++ & ~(VC_CMA_CHUNK_SIZE - 1); ++ if (new_size > vc_cma_size) ++ vc_cma_size = 0; ++ vc_cma_initial = (vc_cma_initial + VC_CMA_CHUNK_SIZE - 1) ++ & ~(VC_CMA_CHUNK_SIZE - 1); ++ if (vc_cma_initial > vc_cma_size) ++ vc_cma_initial = vc_cma_size; ++ vc_cma_base = (vc_cma_base + VC_CMA_CHUNK_SIZE - 1) ++ & ~(VC_CMA_CHUNK_SIZE - 1); ++ ++ printk(KERN_NOTICE " -> initial %x, size %x, base %x", vc_cma_initial, ++ vc_cma_size, (unsigned int)vc_cma_base); ++ ++ return 0; ++} ++ ++early_param("vc-cma-mem", early_vc_cma_mem); ++ ++void __init vc_cma_early_init(void) ++{ ++ LOG_DBG("vc_cma_early_init - vc_cma_chunks = %d", vc_cma_chunks); ++ if (vc_cma_size) { ++ int rc = platform_device_register(&vc_cma_device); ++ LOG_DBG("platform_device_register -> %d", rc); ++ } ++} ++ ++void __init vc_cma_reserve(void) ++{ ++ /* if vc_cma_size is set, then declare vc CMA area of the same ++ * size from the end of memory ++ */ ++ if (vc_cma_size) { ++ if (dma_declare_contiguous(&vc_cma_device.dev, vc_cma_size, ++ vc_cma_base, 0) == 0) { ++ if (!dev_get_cma_area(NULL)) { ++ /* There is no default CMA area - make this ++ the default */ ++ struct cma *vc_cma_area = dev_get_cma_area( ++ &vc_cma_device.dev); ++ dma_contiguous_set_default(vc_cma_area); ++ LOG_INFO("vc_cma_reserve - using vc_cma as " ++ "the default contiguous DMA area"); ++ } ++ } else { ++ LOG_ERR("vc_cma: dma_declare_contiguous(%x,%x) failed", ++ vc_cma_size, (unsigned int)vc_cma_base); ++ vc_cma_size = 0; ++ } ++ } ++ vc_cma_chunks = vc_cma_size / VC_CMA_CHUNK_SIZE; ++} ++ ++/**************************************************************************** ++* ++* vc_cma_open ++* ++***************************************************************************/ ++ ++static int vc_cma_open(struct inode *inode, struct file *file) ++{ ++ (void)inode; ++ (void)file; ++ ++ return 0; ++} ++ ++/**************************************************************************** ++* ++* vc_cma_release ++* ++***************************************************************************/ ++ ++static int vc_cma_release(struct inode *inode, struct file *file) ++{ ++ (void)inode; ++ (void)file; ++ ++ vc_cma_set_reserve(0, current->tgid); ++ ++ return 0; ++} ++ ++/**************************************************************************** ++* ++* vc_cma_ioctl ++* ++***************************************************************************/ ++ ++static long vc_cma_ioctl(struct file *file, unsigned int cmd, unsigned long arg) ++{ ++ int rc = 0; ++ ++ (void)cmd; ++ (void)arg; ++ ++ switch (cmd) { ++ case VC_CMA_IOC_RESERVE: ++ rc = vc_cma_set_reserve((unsigned int)arg, current->tgid); ++ if (rc >= 0) ++ rc = 0; ++ break; ++ default: ++ LOG_ERR("vc-cma: Unknown ioctl %x", cmd); ++ return -ENOTTY; ++ } ++ ++ return rc; ++} ++ ++/**************************************************************************** ++* ++* File Operations for the driver. ++* ++***************************************************************************/ ++ ++static const struct file_operations vc_cma_fops = { ++ .owner = THIS_MODULE, ++ .open = vc_cma_open, ++ .release = vc_cma_release, ++ .unlocked_ioctl = vc_cma_ioctl, ++}; ++ ++/**************************************************************************** ++* ++* vc_cma_proc_open ++* ++***************************************************************************/ ++ ++static int vc_cma_show_info(struct seq_file *m, void *v) ++{ ++ int i; ++ ++ seq_printf(m, "Videocore CMA:\n"); ++ seq_printf(m, " Base : %08x\n", (unsigned int)vc_cma_base); ++ seq_printf(m, " Length : %08x\n", vc_cma_size); ++ seq_printf(m, " Initial : %08x\n", vc_cma_initial); ++ seq_printf(m, " Chunk size : %08x\n", VC_CMA_CHUNK_SIZE); ++ seq_printf(m, " Chunks : %4d (%d bytes)\n", ++ (int)vc_cma_chunks, ++ (int)(vc_cma_chunks * VC_CMA_CHUNK_SIZE)); ++ seq_printf(m, " Used : %4d (%d bytes)\n", ++ (int)vc_cma_chunks_used, ++ (int)(vc_cma_chunks_used * VC_CMA_CHUNK_SIZE)); ++ seq_printf(m, " Reserved : %4d (%d bytes)\n", ++ (unsigned int)vc_cma_chunks_reserved, ++ (int)(vc_cma_chunks_reserved * VC_CMA_CHUNK_SIZE)); ++ ++ for (i = 0; i < vc_cma_reserve_count; i++) { ++ struct vc_cma_reserve_user *user = &vc_cma_reserve_users[i]; ++ seq_printf(m, " PID %5d: %d bytes\n", user->pid, ++ user->reserve); ++ } ++ seq_printf(m, " dma_alloc : %p (%d pages)\n", ++ vc_cma_dma_alloc ? page_address(vc_cma_dma_alloc) : 0, ++ vc_cma_dma_size); ++ ++ seq_printf(m, "\n"); ++ ++ return 0; ++} ++ ++static int vc_cma_proc_open(struct inode *inode, struct file *file) ++{ ++ return single_open(file, vc_cma_show_info, NULL); ++} ++ ++/**************************************************************************** ++* ++* vc_cma_proc_write ++* ++***************************************************************************/ ++ ++static int vc_cma_proc_write(struct file *file, ++ const char __user *buffer, ++ size_t size, loff_t *ppos) ++{ ++ int rc = -EFAULT; ++ char input_str[20]; ++ ++ memset(input_str, 0, sizeof(input_str)); ++ ++ if (size > sizeof(input_str)) { ++ LOG_ERR("%s: input string length too long", __func__); ++ goto out; ++ } ++ ++ if (copy_from_user(input_str, buffer, size - 1)) { ++ LOG_ERR("%s: failed to get input string", __func__); ++ goto out; ++ } ++#define ALLOC_STR "alloc" ++#define FREE_STR "free" ++#define DEBUG_STR "debug" ++#define RESERVE_STR "reserve" ++#define DMA_ALLOC_STR "dma_alloc" ++#define DMA_FREE_STR "dma_free" ++ if (strncmp(input_str, ALLOC_STR, strlen(ALLOC_STR)) == 0) { ++ int alloc_size; ++ char *p = input_str + strlen(ALLOC_STR); ++ ++ while (*p == ' ') ++ p++; ++ alloc_size = memparse(p, NULL); ++ LOG_INFO("/proc/vc-cma: alloc %d", alloc_size); ++ if (alloc_size) ++ send_vc_msg(VC_CMA_MSG_REQUEST_FREE, ++ alloc_size / VC_CMA_CHUNK_SIZE, 0); ++ else ++ LOG_ERR("invalid size '%s'", p); ++ rc = size; ++ } else if (strncmp(input_str, FREE_STR, strlen(FREE_STR)) == 0) { ++ int alloc_size; ++ char *p = input_str + strlen(FREE_STR); ++ ++ while (*p == ' ') ++ p++; ++ alloc_size = memparse(p, NULL); ++ LOG_INFO("/proc/vc-cma: free %d", alloc_size); ++ if (alloc_size) ++ send_vc_msg(VC_CMA_MSG_REQUEST_ALLOC, ++ alloc_size / VC_CMA_CHUNK_SIZE, 0); ++ else ++ LOG_ERR("invalid size '%s'", p); ++ rc = size; ++ } else if (strncmp(input_str, DEBUG_STR, strlen(DEBUG_STR)) == 0) { ++ char *p = input_str + strlen(DEBUG_STR); ++ while (*p == ' ') ++ p++; ++ if ((strcmp(p, "on") == 0) || (strcmp(p, "1") == 0)) ++ vc_cma_debug = 1; ++ else if ((strcmp(p, "off") == 0) || (strcmp(p, "0") == 0)) ++ vc_cma_debug = 0; ++ LOG_INFO("/proc/vc-cma: debug %s", vc_cma_debug ? "on" : "off"); ++ rc = size; ++ } else if (strncmp(input_str, RESERVE_STR, strlen(RESERVE_STR)) == 0) { ++ int alloc_size; ++ int reserved; ++ char *p = input_str + strlen(RESERVE_STR); ++ while (*p == ' ') ++ p++; ++ alloc_size = memparse(p, NULL); ++ ++ reserved = vc_cma_set_reserve(alloc_size, current->tgid); ++ rc = (reserved >= 0) ? size : reserved; ++ } else if (strncmp(input_str, DMA_ALLOC_STR, strlen(DMA_ALLOC_STR)) == 0) { ++ int alloc_size; ++ char *p = input_str + strlen(DMA_ALLOC_STR); ++ while (*p == ' ') ++ p++; ++ alloc_size = memparse(p, NULL); ++ ++ if (vc_cma_dma_alloc) { ++ dma_release_from_contiguous(NULL, vc_cma_dma_alloc, ++ vc_cma_dma_size); ++ vc_cma_dma_alloc = NULL; ++ vc_cma_dma_size = 0; ++ } ++ vc_cma_dma_alloc = dma_alloc_from_contiguous(NULL, alloc_size, 0); ++ vc_cma_dma_size = (vc_cma_dma_alloc ? alloc_size : 0); ++ if (vc_cma_dma_alloc) ++ LOG_INFO("dma_alloc(%d pages) -> %p", alloc_size, page_address(vc_cma_dma_alloc)); ++ else ++ LOG_ERR("dma_alloc(%d pages) failed", alloc_size); ++ rc = size; ++ } else if (strncmp(input_str, DMA_FREE_STR, strlen(DMA_FREE_STR)) == 0) { ++ if (vc_cma_dma_alloc) { ++ dma_release_from_contiguous(NULL, vc_cma_dma_alloc, ++ vc_cma_dma_size); ++ vc_cma_dma_alloc = NULL; ++ vc_cma_dma_size = 0; ++ } ++ rc = size; ++ } ++ ++out: ++ return rc; ++} ++ ++/**************************************************************************** ++* ++* File Operations for /proc interface. ++* ++***************************************************************************/ ++ ++static const struct file_operations vc_cma_proc_fops = { ++ .open = vc_cma_proc_open, ++ .read = seq_read, ++ .write = vc_cma_proc_write, ++ .llseek = seq_lseek, ++ .release = single_release ++}; ++ ++static int vc_cma_set_reserve(unsigned int reserve, unsigned int pid) ++{ ++ struct vc_cma_reserve_user *user = NULL; ++ int delta = 0; ++ int i; ++ ++ if (down_interruptible(&vc_cma_reserve_mutex)) ++ return -ERESTARTSYS; ++ ++ for (i = 0; i < vc_cma_reserve_count; i++) { ++ if (pid == vc_cma_reserve_users[i].pid) { ++ user = &vc_cma_reserve_users[i]; ++ delta = reserve - user->reserve; ++ if (reserve) ++ user->reserve = reserve; ++ else { ++ /* Remove this entry by copying downwards */ ++ while ((i + 1) < vc_cma_reserve_count) { ++ user[0].pid = user[1].pid; ++ user[0].reserve = user[1].reserve; ++ user++; ++ i++; ++ } ++ vc_cma_reserve_count--; ++ user = NULL; ++ } ++ break; ++ } ++ } ++ ++ if (reserve && !user) { ++ if (vc_cma_reserve_count == VC_CMA_RESERVE_COUNT_MAX) { ++ LOG_ERR("vc-cma: Too many reservations - " ++ "increase CMA_RESERVE_COUNT_MAX"); ++ up(&vc_cma_reserve_mutex); ++ return -EBUSY; ++ } ++ user = &vc_cma_reserve_users[vc_cma_reserve_count]; ++ user->pid = pid; ++ user->reserve = reserve; ++ delta = reserve; ++ vc_cma_reserve_count++; ++ } ++ ++ vc_cma_reserve_total += delta; ++ ++ send_vc_msg(VC_CMA_MSG_RESERVE, ++ vc_cma_reserve_total & 0xffff, vc_cma_reserve_total >> 16); ++ ++ send_worker_msg((VCHIQ_HEADER_T *) VC_CMA_MSG_UPDATE_RESERVE); ++ ++ LOG_DBG("/proc/vc-cma: reserve %d (PID %d) - total %u", ++ reserve, pid, vc_cma_reserve_total); ++ ++ up(&vc_cma_reserve_mutex); ++ ++ return vc_cma_reserve_total; ++} ++ ++static VCHIQ_STATUS_T cma_service_callback(VCHIQ_REASON_T reason, ++ VCHIQ_HEADER_T * header, ++ VCHIQ_SERVICE_HANDLE_T service, ++ void *bulk_userdata) ++{ ++ switch (reason) { ++ case VCHIQ_MESSAGE_AVAILABLE: ++ if (!send_worker_msg(header)) ++ return VCHIQ_RETRY; ++ break; ++ case VCHIQ_SERVICE_CLOSED: ++ LOG_DBG("CMA service closed"); ++ break; ++ default: ++ LOG_ERR("Unexpected CMA callback reason %d", reason); ++ break; ++ } ++ return VCHIQ_SUCCESS; ++} ++ ++static void send_vc_msg(unsigned short type, ++ unsigned short param1, unsigned short param2) ++{ ++ unsigned short msg[] = { type, param1, param2 }; ++ VCHIQ_ELEMENT_T elem = { &msg, sizeof(msg) }; ++ VCHIQ_STATUS_T ret; ++ vchiq_use_service(cma_service); ++ ret = vchiq_queue_message(cma_service, &elem, 1); ++ vchiq_release_service(cma_service); ++ if (ret != VCHIQ_SUCCESS) ++ LOG_ERR("vchiq_queue_message returned %x", ret); ++} ++ ++static bool send_worker_msg(VCHIQ_HEADER_T * msg) ++{ ++ if (down_interruptible(&vc_cma_worker_queue_push_mutex)) ++ return false; ++ vchiu_queue_push(&cma_msg_queue, msg); ++ up(&vc_cma_worker_queue_push_mutex); ++ return true; ++} ++ ++static int vc_cma_alloc_chunks(int num_chunks, struct cma_msg *reply) ++{ ++ int i; ++ for (i = 0; i < num_chunks; i++) { ++ struct page *chunk; ++ unsigned int chunk_num; ++ uint8_t *chunk_addr; ++ size_t chunk_size = PAGES_PER_CHUNK << PAGE_SHIFT; ++ ++ chunk = dma_alloc_from_contiguous(&vc_cma_device.dev, ++ PAGES_PER_CHUNK, ++ VC_CMA_CHUNK_ORDER); ++ if (!chunk) ++ break; ++ ++ chunk_addr = page_address(chunk); ++ dmac_flush_range(chunk_addr, chunk_addr + chunk_size); ++ outer_inv_range(__pa(chunk_addr), __pa(chunk_addr) + ++ chunk_size); ++ ++ chunk_num = ++ (page_to_phys(chunk) - vc_cma_base) / VC_CMA_CHUNK_SIZE; ++ BUG_ON(((page_to_phys(chunk) - vc_cma_base) % ++ VC_CMA_CHUNK_SIZE) != 0); ++ if (chunk_num >= vc_cma_chunks) { ++ phys_addr_t _pa = vc_cma_base + vc_cma_size - 1; ++ LOG_ERR("%s: ===============================", ++ __func__); ++ LOG_ERR("%s: chunk phys %x, vc_cma %pa-%pa - " ++ "bad SPARSEMEM configuration?", ++ __func__, (unsigned int)page_to_phys(chunk), ++ &vc_cma_base, &_pa); ++ LOG_ERR("%s: dev->cma_area = %p", __func__, ++ (void*)0/*vc_cma_device.dev.cma_area*/); ++ LOG_ERR("%s: ===============================", ++ __func__); ++ break; ++ } ++ reply->params[i] = chunk_num; ++ vc_cma_chunks_used++; ++ } ++ ++ if (i < num_chunks) { ++ LOG_ERR("%s: dma_alloc_from_contiguous failed " ++ "for %x bytes (alloc %d of %d, %d free)", ++ __func__, VC_CMA_CHUNK_SIZE, i, ++ num_chunks, vc_cma_chunks - vc_cma_chunks_used); ++ num_chunks = i; ++ } ++ ++ LOG_DBG("CMA allocated %d chunks -> %d used", ++ num_chunks, vc_cma_chunks_used); ++ reply->type = VC_CMA_MSG_ALLOCATED; ++ ++ { ++ VCHIQ_ELEMENT_T elem = { ++ reply, ++ offsetof(struct cma_msg, params[0]) + ++ num_chunks * sizeof(reply->params[0]) ++ }; ++ VCHIQ_STATUS_T ret; ++ vchiq_use_service(cma_service); ++ ret = vchiq_queue_message(cma_service, &elem, 1); ++ vchiq_release_service(cma_service); ++ if (ret != VCHIQ_SUCCESS) ++ LOG_ERR("vchiq_queue_message return " "%x", ret); ++ } ++ ++ return num_chunks; ++} ++ ++static int cma_worker_proc(void *param) ++{ ++ static struct cma_msg reply; ++ (void)param; ++ ++ while (1) { ++ VCHIQ_HEADER_T *msg; ++ static struct cma_msg msg_copy; ++ struct cma_msg *cma_msg = &msg_copy; ++ int type, msg_size; ++ ++ msg = vchiu_queue_pop(&cma_msg_queue); ++ if ((unsigned int)msg >= VC_CMA_MSG_MAX) { ++ msg_size = msg->size; ++ memcpy(&msg_copy, msg->data, msg_size); ++ type = cma_msg->type; ++ vchiq_release_message(cma_service, msg); ++ } else { ++ msg_size = 0; ++ type = (int)msg; ++ if (type == VC_CMA_MSG_QUIT) ++ break; ++ else if (type == VC_CMA_MSG_UPDATE_RESERVE) { ++ msg = NULL; ++ cma_msg = NULL; ++ } else { ++ BUG(); ++ continue; ++ } ++ } ++ ++ switch (type) { ++ case VC_CMA_MSG_ALLOC:{ ++ int num_chunks, free_chunks; ++ num_chunks = cma_msg->params[0]; ++ free_chunks = ++ vc_cma_chunks - vc_cma_chunks_used; ++ LOG_DBG("CMA_MSG_ALLOC(%d chunks)", num_chunks); ++ if (num_chunks > VC_CMA_MAX_PARAMS_PER_MSG) { ++ LOG_ERR ++ ("CMA_MSG_ALLOC - chunk count (%d) " ++ "exceeds VC_CMA_MAX_PARAMS_PER_MSG (%d)", ++ num_chunks, ++ VC_CMA_MAX_PARAMS_PER_MSG); ++ num_chunks = VC_CMA_MAX_PARAMS_PER_MSG; ++ } ++ ++ if (num_chunks > free_chunks) { ++ LOG_ERR ++ ("CMA_MSG_ALLOC - chunk count (%d) " ++ "exceeds free chunks (%d)", ++ num_chunks, free_chunks); ++ num_chunks = free_chunks; ++ } ++ ++ vc_cma_alloc_chunks(num_chunks, &reply); ++ } ++ break; ++ ++ case VC_CMA_MSG_FREE:{ ++ int chunk_count = ++ (msg_size - ++ offsetof(struct cma_msg, ++ params)) / ++ sizeof(cma_msg->params[0]); ++ int i; ++ BUG_ON(chunk_count <= 0); ++ ++ LOG_DBG("CMA_MSG_FREE(%d chunks - %x, ...)", ++ chunk_count, cma_msg->params[0]); ++ for (i = 0; i < chunk_count; i++) { ++ int chunk_num = cma_msg->params[i]; ++ struct page *page = vc_cma_base_page + ++ chunk_num * PAGES_PER_CHUNK; ++ if (chunk_num >= vc_cma_chunks) { ++ LOG_ERR ++ ("CMA_MSG_FREE - chunk %d of %d" ++ " (value %x) exceeds maximum " ++ "(%x)", i, chunk_count, ++ chunk_num, ++ vc_cma_chunks - 1); ++ break; ++ } ++ ++ if (!dma_release_from_contiguous ++ (&vc_cma_device.dev, page, ++ PAGES_PER_CHUNK)) { ++ phys_addr_t _pa = page_to_phys(page); ++ LOG_ERR ++ ("CMA_MSG_FREE - failed to " ++ "release chunk %d (phys %pa, " ++ "page %x)", chunk_num, ++ &_pa, ++ (unsigned int)page); ++ } ++ vc_cma_chunks_used--; ++ } ++ LOG_DBG("CMA released %d chunks -> %d used", ++ i, vc_cma_chunks_used); ++ } ++ break; ++ ++ case VC_CMA_MSG_UPDATE_RESERVE:{ ++ int chunks_needed = ++ ((vc_cma_reserve_total + VC_CMA_CHUNK_SIZE - ++ 1) ++ / VC_CMA_CHUNK_SIZE) - ++ vc_cma_chunks_reserved; ++ ++ LOG_DBG ++ ("CMA_MSG_UPDATE_RESERVE(%d chunks needed)", ++ chunks_needed); ++ ++ /* Cap the reservations to what is available */ ++ if (chunks_needed > 0) { ++ if (chunks_needed > ++ (vc_cma_chunks - ++ vc_cma_chunks_used)) ++ chunks_needed = ++ (vc_cma_chunks - ++ vc_cma_chunks_used); ++ ++ chunks_needed = ++ vc_cma_alloc_chunks(chunks_needed, ++ &reply); ++ } ++ ++ LOG_DBG ++ ("CMA_MSG_UPDATE_RESERVE(%d chunks allocated)", ++ chunks_needed); ++ vc_cma_chunks_reserved += chunks_needed; ++ } ++ break; ++ ++ default: ++ LOG_ERR("unexpected msg type %d", type); ++ break; ++ } ++ } ++ ++ LOG_DBG("quitting..."); ++ return 0; ++} ++ ++/**************************************************************************** ++* ++* vc_cma_connected_init ++* ++* This function is called once the videocore has been connected. ++* ++***************************************************************************/ ++ ++static void vc_cma_connected_init(void) ++{ ++ VCHIQ_SERVICE_PARAMS_T service_params; ++ ++ LOG_DBG("vc_cma_connected_init"); ++ ++ if (!vchiu_queue_init(&cma_msg_queue, 16)) { ++ LOG_ERR("could not create CMA msg queue"); ++ goto fail_queue; ++ } ++ ++ if (vchiq_initialise(&cma_instance) != VCHIQ_SUCCESS) ++ goto fail_vchiq_init; ++ ++ vchiq_connect(cma_instance); ++ ++ service_params.fourcc = VC_CMA_FOURCC; ++ service_params.callback = cma_service_callback; ++ service_params.userdata = NULL; ++ service_params.version = VC_CMA_VERSION; ++ service_params.version_min = VC_CMA_VERSION; ++ ++ if (vchiq_open_service(cma_instance, &service_params, ++ &cma_service) != VCHIQ_SUCCESS) { ++ LOG_ERR("failed to open service - already in use?"); ++ goto fail_vchiq_open; ++ } ++ ++ vchiq_release_service(cma_service); ++ ++ cma_worker = kthread_create(cma_worker_proc, NULL, "cma_worker"); ++ if (!cma_worker) { ++ LOG_ERR("could not create CMA worker thread"); ++ goto fail_worker; ++ } ++ set_user_nice(cma_worker, -20); ++ wake_up_process(cma_worker); ++ ++ return; ++ ++fail_worker: ++ vchiq_close_service(cma_service); ++fail_vchiq_open: ++ vchiq_shutdown(cma_instance); ++fail_vchiq_init: ++ vchiu_queue_delete(&cma_msg_queue); ++fail_queue: ++ return; ++} ++ ++void ++loud_error_header(void) ++{ ++ if (in_loud_error) ++ return; ++ ++ LOG_ERR("============================================================" ++ "================"); ++ LOG_ERR("============================================================" ++ "================"); ++ LOG_ERR("====="); ++ ++ in_loud_error = 1; ++} ++ ++void ++loud_error_footer(void) ++{ ++ if (!in_loud_error) ++ return; ++ ++ LOG_ERR("====="); ++ LOG_ERR("============================================================" ++ "================"); ++ LOG_ERR("============================================================" ++ "================"); ++ ++ in_loud_error = 0; ++} ++ ++#if 1 ++static int check_cma_config(void) { return 1; } ++#else ++static int ++read_vc_debug_var(VC_MEM_ACCESS_HANDLE_T handle, ++ const char *symbol, ++ void *buf, size_t bufsize) ++{ ++ VC_MEM_ADDR_T vcMemAddr; ++ size_t vcMemSize; ++ uint8_t *mapAddr; ++ off_t vcMapAddr; ++ ++ if (!LookupVideoCoreSymbol(handle, symbol, ++ &vcMemAddr, ++ &vcMemSize)) { ++ loud_error_header(); ++ loud_error( ++ "failed to find VC symbol \"%s\".", ++ symbol); ++ loud_error_footer(); ++ return 0; ++ } ++ ++ if (vcMemSize != bufsize) { ++ loud_error_header(); ++ loud_error( ++ "VC symbol \"%s\" is the wrong size.", ++ symbol); ++ loud_error_footer(); ++ return 0; ++ } ++ ++ vcMapAddr = (off_t)vcMemAddr & VC_MEM_TO_ARM_ADDR_MASK; ++ vcMapAddr += mm_vc_mem_phys_addr; ++ mapAddr = ioremap_nocache(vcMapAddr, vcMemSize); ++ if (mapAddr == 0) { ++ loud_error_header(); ++ loud_error( ++ "failed to ioremap \"%s\" @ 0x%x " ++ "(phys: 0x%x, size: %u).", ++ symbol, ++ (unsigned int)vcMapAddr, ++ (unsigned int)vcMemAddr, ++ (unsigned int)vcMemSize); ++ loud_error_footer(); ++ return 0; ++ } ++ ++ memcpy(buf, mapAddr, bufsize); ++ iounmap(mapAddr); ++ ++ return 1; ++} ++ ++ ++static int ++check_cma_config(void) ++{ ++ VC_MEM_ACCESS_HANDLE_T mem_hndl; ++ VC_MEM_ADDR_T mempool_start; ++ VC_MEM_ADDR_T mempool_end; ++ VC_MEM_ADDR_T mempool_offline_start; ++ VC_MEM_ADDR_T mempool_offline_end; ++ VC_MEM_ADDR_T cam_alloc_base; ++ VC_MEM_ADDR_T cam_alloc_size; ++ VC_MEM_ADDR_T cam_alloc_end; ++ int success = 0; ++ ++ if (OpenVideoCoreMemory(&mem_hndl) != 0) ++ goto out; ++ ++ /* Read the relevant VideoCore variables */ ++ if (!read_vc_debug_var(mem_hndl, "__MEMPOOL_START", ++ &mempool_start, ++ sizeof(mempool_start))) ++ goto close; ++ ++ if (!read_vc_debug_var(mem_hndl, "__MEMPOOL_END", ++ &mempool_end, ++ sizeof(mempool_end))) ++ goto close; ++ ++ if (!read_vc_debug_var(mem_hndl, "__MEMPOOL_OFFLINE_START", ++ &mempool_offline_start, ++ sizeof(mempool_offline_start))) ++ goto close; ++ ++ if (!read_vc_debug_var(mem_hndl, "__MEMPOOL_OFFLINE_END", ++ &mempool_offline_end, ++ sizeof(mempool_offline_end))) ++ goto close; ++ ++ if (!read_vc_debug_var(mem_hndl, "cam_alloc_base", ++ &cam_alloc_base, ++ sizeof(cam_alloc_base))) ++ goto close; ++ ++ if (!read_vc_debug_var(mem_hndl, "cam_alloc_size", ++ &cam_alloc_size, ++ sizeof(cam_alloc_size))) ++ goto close; ++ ++ cam_alloc_end = cam_alloc_base + cam_alloc_size; ++ ++ success = 1; ++ ++ /* Now the sanity checks */ ++ if (!mempool_offline_start) ++ mempool_offline_start = mempool_start; ++ if (!mempool_offline_end) ++ mempool_offline_end = mempool_end; ++ ++ if (VCADDR_TO_PHYSADDR(mempool_offline_start) != vc_cma_base) { ++ loud_error_header(); ++ loud_error( ++ "__MEMPOOL_OFFLINE_START(%x -> %lx) doesn't match " ++ "vc_cma_base(%x)", ++ mempool_offline_start, ++ VCADDR_TO_PHYSADDR(mempool_offline_start), ++ vc_cma_base); ++ success = 0; ++ } ++ ++ if (VCADDR_TO_PHYSADDR(mempool_offline_end) != ++ (vc_cma_base + vc_cma_size)) { ++ loud_error_header(); ++ loud_error( ++ "__MEMPOOL_OFFLINE_END(%x -> %lx) doesn't match " ++ "vc_cma_base(%x) + vc_cma_size(%x) = %x", ++ mempool_offline_start, ++ VCADDR_TO_PHYSADDR(mempool_offline_end), ++ vc_cma_base, vc_cma_size, vc_cma_base + vc_cma_size); ++ success = 0; ++ } ++ ++ if (mempool_end < mempool_start) { ++ loud_error_header(); ++ loud_error( ++ "__MEMPOOL_END(%x) must not be before " ++ "__MEMPOOL_START(%x)", ++ mempool_end, ++ mempool_start); ++ success = 0; ++ } ++ ++ if (mempool_offline_end < mempool_offline_start) { ++ loud_error_header(); ++ loud_error( ++ "__MEMPOOL_OFFLINE_END(%x) must not be before " ++ "__MEMPOOL_OFFLINE_START(%x)", ++ mempool_offline_end, ++ mempool_offline_start); ++ success = 0; ++ } ++ ++ if (mempool_offline_start < mempool_start) { ++ loud_error_header(); ++ loud_error( ++ "__MEMPOOL_OFFLINE_START(%x) must not be before " ++ "__MEMPOOL_START(%x)", ++ mempool_offline_start, ++ mempool_start); ++ success = 0; ++ } ++ ++ if (mempool_offline_end > mempool_end) { ++ loud_error_header(); ++ loud_error( ++ "__MEMPOOL_OFFLINE_END(%x) must not be after " ++ "__MEMPOOL_END(%x)", ++ mempool_offline_end, ++ mempool_end); ++ success = 0; ++ } ++ ++ if ((cam_alloc_base < mempool_end) && ++ (cam_alloc_end > mempool_start)) { ++ loud_error_header(); ++ loud_error( ++ "cam_alloc pool(%x-%x) overlaps " ++ "mempool(%x-%x)", ++ cam_alloc_base, cam_alloc_end, ++ mempool_start, mempool_end); ++ success = 0; ++ } ++ ++ loud_error_footer(); ++ ++close: ++ CloseVideoCoreMemory(mem_hndl); ++ ++out: ++ return success; ++} ++#endif ++ ++static int vc_cma_init(void) ++{ ++ int rc = -EFAULT; ++ struct device *dev; ++ ++ if (!check_cma_config()) ++ goto out_release; ++ ++ LOG_INFO("vc-cma: Videocore CMA driver"); ++ LOG_INFO("vc-cma: vc_cma_base = %pa", &vc_cma_base); ++ LOG_INFO("vc-cma: vc_cma_size = 0x%08x (%u MiB)", ++ vc_cma_size, vc_cma_size / (1024 * 1024)); ++ LOG_INFO("vc-cma: vc_cma_initial = 0x%08x (%u MiB)", ++ vc_cma_initial, vc_cma_initial / (1024 * 1024)); ++ ++ vc_cma_base_page = phys_to_page(vc_cma_base); ++ ++ if (vc_cma_chunks) { ++ int chunks_needed = vc_cma_initial / VC_CMA_CHUNK_SIZE; ++ ++ for (vc_cma_chunks_used = 0; ++ vc_cma_chunks_used < chunks_needed; vc_cma_chunks_used++) { ++ struct page *chunk; ++ chunk = dma_alloc_from_contiguous(&vc_cma_device.dev, ++ PAGES_PER_CHUNK, ++ VC_CMA_CHUNK_ORDER); ++ if (!chunk) ++ break; ++ BUG_ON(((page_to_phys(chunk) - vc_cma_base) % ++ VC_CMA_CHUNK_SIZE) != 0); ++ } ++ if (vc_cma_chunks_used != chunks_needed) { ++ LOG_ERR("%s: dma_alloc_from_contiguous failed (%d " ++ "bytes, allocation %d of %d)", ++ __func__, VC_CMA_CHUNK_SIZE, ++ vc_cma_chunks_used, chunks_needed); ++ goto out_release; ++ } ++ ++ vchiq_add_connected_callback(vc_cma_connected_init); ++ } ++ ++ rc = alloc_chrdev_region(&vc_cma_devnum, 0, 1, DRIVER_NAME); ++ if (rc < 0) { ++ LOG_ERR("%s: alloc_chrdev_region failed (rc=%d)", __func__, rc); ++ goto out_release; ++ } ++ ++ cdev_init(&vc_cma_cdev, &vc_cma_fops); ++ rc = cdev_add(&vc_cma_cdev, vc_cma_devnum, 1); ++ if (rc != 0) { ++ LOG_ERR("%s: cdev_add failed (rc=%d)", __func__, rc); ++ goto out_unregister; ++ } ++ ++ vc_cma_class = class_create(THIS_MODULE, DRIVER_NAME); ++ if (IS_ERR(vc_cma_class)) { ++ rc = PTR_ERR(vc_cma_class); ++ LOG_ERR("%s: class_create failed (rc=%d)", __func__, rc); ++ goto out_cdev_del; ++ } ++ ++ dev = device_create(vc_cma_class, NULL, vc_cma_devnum, NULL, ++ DRIVER_NAME); ++ if (IS_ERR(dev)) { ++ rc = PTR_ERR(dev); ++ LOG_ERR("%s: device_create failed (rc=%d)", __func__, rc); ++ goto out_class_destroy; ++ } ++ ++ vc_cma_proc_entry = proc_create(DRIVER_NAME, 0444, NULL, &vc_cma_proc_fops); ++ if (vc_cma_proc_entry == NULL) { ++ rc = -EFAULT; ++ LOG_ERR("%s: proc_create failed", __func__); ++ goto out_device_destroy; ++ } ++ ++ vc_cma_inited = 1; ++ return 0; ++ ++out_device_destroy: ++ device_destroy(vc_cma_class, vc_cma_devnum); ++ ++out_class_destroy: ++ class_destroy(vc_cma_class); ++ vc_cma_class = NULL; ++ ++out_cdev_del: ++ cdev_del(&vc_cma_cdev); ++ ++out_unregister: ++ unregister_chrdev_region(vc_cma_devnum, 1); ++ ++out_release: ++ /* It is tempting to try to clean up by calling ++ dma_release_from_contiguous for all allocated chunks, but it isn't ++ a very safe thing to do. If vc_cma_initial is non-zero it is because ++ VideoCore is already using that memory, so giving it back to Linux ++ is likely to be fatal. ++ */ ++ return -1; ++} ++ ++/**************************************************************************** ++* ++* vc_cma_exit ++* ++***************************************************************************/ ++ ++static void __exit vc_cma_exit(void) ++{ ++ LOG_DBG("%s: called", __func__); ++ ++ if (vc_cma_inited) { ++ remove_proc_entry(DRIVER_NAME, NULL); ++ device_destroy(vc_cma_class, vc_cma_devnum); ++ class_destroy(vc_cma_class); ++ cdev_del(&vc_cma_cdev); ++ unregister_chrdev_region(vc_cma_devnum, 1); ++ } ++} ++ ++module_init(vc_cma_init); ++module_exit(vc_cma_exit); ++MODULE_LICENSE("GPL"); ++MODULE_AUTHOR("Broadcom Corporation"); +--- /dev/null ++++ b/include/linux/broadcom/vc_cma.h +@@ -0,0 +1,36 @@ ++/***************************************************************************** ++* Copyright 2012 Broadcom Corporation. All rights reserved. ++* ++* Unless you and Broadcom execute a separate written software license ++* agreement governing use of this software, this software is licensed to you ++* under the terms of the GNU General Public License version 2, available at ++* http://www.broadcom.com/licenses/GPLv2.php (the "GPL"). ++* ++* Notwithstanding the above, under no circumstances may you combine this ++* software in any way with any other Broadcom software provided under a ++* license other than the GPL, without Broadcom's express prior written ++* consent. ++*****************************************************************************/ ++ ++#if !defined( VC_CMA_H ) ++#define VC_CMA_H ++ ++#include <linux/ioctl.h> ++ ++#define VC_CMA_IOC_MAGIC 0xc5 ++ ++#define VC_CMA_IOC_RESERVE _IO(VC_CMA_IOC_MAGIC, 0) ++ ++#ifdef __KERNEL__ ++ ++#ifdef CONFIG_BCM_VC_CMA ++void vc_cma_early_init(void); ++void vc_cma_reserve(void); ++#else ++static inline void vc_cma_early_init(void) { } ++static inline void vc_cma_reserve(void) { } ++#endif ++ ++#endif ++ ++#endif /* VC_CMA_H */ |