/
vc_cma.c
1145 lines (979 loc) · 29 KB
/
vc_cma.c
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/**
* 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_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;
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 __init 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(NULL /*&vc_cma_device.dev*/, vc_cma_size,
vc_cma_base, 0) == 0) {
} 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, "\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"
if (strncmp(input_str, ALLOC_STR, strlen(ALLOC_STR)) == 0) {
int size;
char *p = input_str + strlen(ALLOC_STR);
while (*p == ' ')
p++;
size = memparse(p, NULL);
LOG_ERR("/proc/vc-cma: alloc %d", size);
if (size)
send_vc_msg(VC_CMA_MSG_REQUEST_FREE,
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 size;
char *p = input_str + strlen(FREE_STR);
while (*p == ' ')
p++;
size = memparse(p, NULL);
LOG_ERR("/proc/vc-cma: free %d", size);
if (size)
send_vc_msg(VC_CMA_MSG_REQUEST_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_ERR("/proc/vc-cma: debug %s", vc_cma_debug ? "on" : "off");
rc = size;
} else if (strncmp(input_str, RESERVE_STR, strlen(RESERVE_STR)) == 0) {
int size;
int reserved;
char *p = input_str + strlen(RESERVE_STR);
while (*p == ' ')
p++;
size = memparse(p, NULL);
reserved = vc_cma_set_reserve(size, current->tgid);
rc = (reserved >= 0) ? size : reserved;
}
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(NULL /*&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) {
LOG_ERR("%s: ===============================",
__func__);
LOG_ERR("%s: chunk phys %x, vc_cma %x-%x - "
"bad SPARSEMEM configuration?",
__func__, (unsigned int)page_to_phys(chunk),
vc_cma_base, vc_cma_base + vc_cma_size - 1);
LOG_ERR("%s: dev->cma_area = %p\n", __func__,
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
(NULL /*&vc_cma_device.dev*/, page,
PAGES_PER_CHUNK)) {
LOG_ERR
("CMA_MSG_FREE - failed to "
"release chunk %d (phys %x, "
"page %x)", chunk_num,
page_to_phys(page),
(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(