+++ /dev/null
-From 8048b89975994cc6070cd23900a41b9990fa8ad0 Mon Sep 17 00:00:00 2001
-From: popcornmix <popcornmix@gmail.com>
-Date: Wed, 3 Jul 2013 00:31:47 +0100
-Subject: [PATCH 010/222] cma: Add vc_cma driver to enable use of CMA
-
-Signed-off-by: popcornmix <popcornmix@gmail.com>
-
-vc_cma: Make the vc_cma area the default contiguous DMA area
----
- drivers/char/Kconfig | 2 +
- drivers/char/Makefile | 1 +
- drivers/char/broadcom/Kconfig | 15 +
- drivers/char/broadcom/Makefile | 1 +
- drivers/char/broadcom/vc_cma/Makefile | 14 +
- drivers/char/broadcom/vc_cma/vc_cma.c | 1193 +++++++++++++++++++++++++++++++++
- include/linux/broadcom/vc_cma.h | 29 +
- 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
-@@ -590,6 +590,8 @@ config DEVPORT
-
- source "drivers/s390/char/Kconfig"
-
-+source "drivers/char/broadcom/Kconfig"
-+
- config MSM_SMD_PKT
- bool "Enable device interface for some SMD packet ports"
- default n
---- a/drivers/char/Makefile
-+++ b/drivers/char/Makefile
-@@ -62,3 +62,4 @@ js-rtc-y = rtc.o
-
- obj-$(CONFIG_TILE_SROM) += tile-srom.o
- obj-$(CONFIG_XILLYBUS) += xillybus/
-+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 +1,14 @@
-+ccflags-y += -Wall -Wstrict-prototypes -Wno-trigraphs
-+ccflags-y += -Werror
-+ccflags-y += -Iinclude/linux/broadcom
-+ccflags-y += -Idrivers/misc/vc04_services
-+ccflags-y += -Idrivers/misc/vc04_services/interface/vchi
-+ccflags-y += -Idrivers/misc/vc04_services/interface/vchiq_arm
-+
-+ccflags-y += -D__KERNEL__
-+ccflags-y += -D__linux__
-+ccflags-y += -Werror
-+
-+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 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 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 +1,29 @@
-+/*****************************************************************************
-+* 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__
-+extern void __init vc_cma_early_init(void);
-+extern void __init vc_cma_reserve(void);
-+#endif
-+
-+#endif /* VC_CMA_H */
projects / openwrt / svn-archive / archive.git / blobdiff