blob: eac52d7c3f0b614d9dbdea436ecbcf2d0a9e7f60 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
/*
* linux/drivers/media/video/s5p-mfc/s5p_mfc_shm.c
*
* Copyright (c) 2010 Samsung Electronics Co., Ltd.
* http://www.samsung.com/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/io.h>
#include "s5p_mfc_common.h"
#include "s5p_mfc_mem.h"
#include "s5p_mfc_debug.h"
int s5p_mfc_init_shm(struct s5p_mfc_ctx *ctx)
{
struct s5p_mfc_dev *dev = ctx->dev;
struct s5p_mfc_buf_size_v5 *buf_size = dev->variant->buf_size->buf;
void *shm_alloc_ctx = dev->alloc_ctx[MFC_CMA_BANK1_ALLOC_CTX];
ctx->shm.alloc = s5p_mfc_mem_alloc(shm_alloc_ctx, buf_size->shared_buf);
if (IS_ERR(ctx->shm.alloc)) {
mfc_err("failed to allocate shared memory\n");
return PTR_ERR(ctx->shm.alloc);
}
/* shm_ofs only keeps the offset from base (port a) */
ctx->shm.ofs = s5p_mfc_mem_cookie(shm_alloc_ctx, ctx->shm.alloc) - dev->port_a;
ctx->shm.virt = s5p_mfc_mem_vaddr(shm_alloc_ctx, ctx->shm.alloc);
if (!ctx->shm.virt) {
s5p_mfc_mem_put(shm_alloc_ctx, ctx->shm.alloc);
ctx->shm.ofs = 0;
ctx->shm.alloc = NULL;
mfc_err("failed to virt addr of shared memory\n");
return -ENOMEM;
}
memset((void *)ctx->shm.virt, 0, buf_size->shared_buf);
s5p_mfc_cache_clean(ctx->shm.alloc);
mfc_debug(2, "shm info addr: 0x%08x, phys: 0x%08lx\n",
(unsigned int)ctx->shm.virt, ctx->shm.ofs);
return 0;
}
|
