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[media] s5p-mfc: add additional check for incorrect memory configuration

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MFC hardware is known to trash random memory if one tries to use a
buffer which has lower DMA addresses than the configured DMA base
address. This patch adds a check for this case and proper error
handling.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Kamil Debski <kamil@wypas.org>
[s.nawrocki@samsung.com: fixed typo (addres -> address]
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Marek Szyprowski 2015-06-03 07:36:23 -03:00 committed by Mauro Carvalho Chehab
parent 490a977a10
commit 1af2198547
4 changed files with 22 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/media/platform/s5p-mfc/s5p_mfc_opr.c
View File

@ -37,10 +37,9 @@ void s5p_mfc_init_regs(struct s5p_mfc_dev *dev)
dev->mfc_regs = s5p_mfc_init_regs_v6_plus(dev);
}
int s5p_mfc_alloc_priv_buf(struct device *dev,
int s5p_mfc_alloc_priv_buf(struct device *dev, dma_addr_t base,
struct s5p_mfc_priv_buf *b)
{
mfc_debug(3, "Allocating priv: %zu\n", b->size);
b->virt = dma_alloc_coherent(dev, b->size, &b->dma, GFP_KERNEL);
@ -50,6 +49,14 @@ int s5p_mfc_alloc_priv_buf(struct device *dev,
return -ENOMEM;
}
if (b->dma < base) {
mfc_err("Invaling memory configuration!\n");
mfc_err("Allocated buffer (%pad) is lower than memory base address (%pad)\n",
&b->dma, &base);
dma_free_coherent(dev, b->size, b->virt, b->dma);
return -ENOMEM;
}
mfc_debug(3, "Allocated addr %p %pad\n", b->virt, &b->dma);
return 0;
}

2
drivers/media/platform/s5p-mfc/s5p_mfc_opr.h
View File

@ -334,7 +334,7 @@ struct s5p_mfc_hw_ops {
void s5p_mfc_init_hw_ops(struct s5p_mfc_dev *dev);
void s5p_mfc_init_regs(struct s5p_mfc_dev *dev);
int s5p_mfc_alloc_priv_buf(struct device *dev,
int s5p_mfc_alloc_priv_buf(struct device *dev, dma_addr_t base,
struct s5p_mfc_priv_buf *b);
void s5p_mfc_release_priv_buf(struct device *dev,
struct s5p_mfc_priv_buf *b);

12
drivers/media/platform/s5p-mfc/s5p_mfc_opr_v5.c
View File

@ -41,7 +41,7 @@ static int s5p_mfc_alloc_dec_temp_buffers_v5(struct s5p_mfc_ctx *ctx)
int ret;
ctx->dsc.size = buf_size->dsc;
ret = s5p_mfc_alloc_priv_buf(dev->mem_dev_l, &ctx->dsc);
ret = s5p_mfc_alloc_priv_buf(dev->mem_dev_l, dev->bank1, &ctx->dsc);
if (ret) {
mfc_err("Failed to allocate temporary buffer\n");
return ret;
@ -172,7 +172,8 @@ static int s5p_mfc_alloc_codec_buffers_v5(struct s5p_mfc_ctx *ctx)
/* Allocate only if memory from bank 1 is necessary */
if (ctx->bank1.size > 0) {
ret = s5p_mfc_alloc_priv_buf(dev->mem_dev_l, &ctx->bank1);
ret = s5p_mfc_alloc_priv_buf(dev->mem_dev_l, dev->bank1,
&ctx->bank1);
if (ret) {
mfc_err("Failed to allocate Bank1 temporary buffer\n");
return ret;
@ -181,7 +182,8 @@ static int s5p_mfc_alloc_codec_buffers_v5(struct s5p_mfc_ctx *ctx)
}
/* Allocate only if memory from bank 2 is necessary */
if (ctx->bank2.size > 0) {
ret = s5p_mfc_alloc_priv_buf(dev->mem_dev_r, &ctx->bank2);
ret = s5p_mfc_alloc_priv_buf(dev->mem_dev_r, dev->bank2,
&ctx->bank2);
if (ret) {
mfc_err("Failed to allocate Bank2 temporary buffer\n");
s5p_mfc_release_priv_buf(ctx->dev->mem_dev_l, &ctx->bank1);
@ -212,7 +214,7 @@ static int s5p_mfc_alloc_instance_buffer_v5(struct s5p_mfc_ctx *ctx)
else
ctx->ctx.size = buf_size->non_h264_ctx;
ret = s5p_mfc_alloc_priv_buf(dev->mem_dev_l, &ctx->ctx);
ret = s5p_mfc_alloc_priv_buf(dev->mem_dev_l, dev->bank1, &ctx->ctx);
if (ret) {
mfc_err("Failed to allocate instance buffer\n");
return ret;
@ -225,7 +227,7 @@ static int s5p_mfc_alloc_instance_buffer_v5(struct s5p_mfc_ctx *ctx)
/* Initialize shared memory */
ctx->shm.size = buf_size->shm;
ret = s5p_mfc_alloc_priv_buf(dev->mem_dev_l, &ctx->shm);
ret = s5p_mfc_alloc_priv_buf(dev->mem_dev_l, dev->bank1, &ctx->shm);
if (ret) {
mfc_err("Failed to allocate shared memory buffer\n");
s5p_mfc_release_priv_buf(dev->mem_dev_l, &ctx->ctx);

8
drivers/media/platform/s5p-mfc/s5p_mfc_opr_v6.c
View File

@ -239,7 +239,8 @@ static int s5p_mfc_alloc_codec_buffers_v6(struct s5p_mfc_ctx *ctx)
/* Allocate only if memory from bank 1 is necessary */
if (ctx->bank1.size > 0) {
ret = s5p_mfc_alloc_priv_buf(dev->mem_dev_l, &ctx->bank1);
ret = s5p_mfc_alloc_priv_buf(dev->mem_dev_l, dev->bank1,
&ctx->bank1);
if (ret) {
mfc_err("Failed to allocate Bank1 memory\n");
return ret;
@ -291,7 +292,7 @@ static int s5p_mfc_alloc_instance_buffer_v6(struct s5p_mfc_ctx *ctx)
break;
}
ret = s5p_mfc_alloc_priv_buf(dev->mem_dev_l, &ctx->ctx);
ret = s5p_mfc_alloc_priv_buf(dev->mem_dev_l, dev->bank1, &ctx->ctx);
if (ret) {
mfc_err("Failed to allocate instance buffer\n");
return ret;
@ -320,7 +321,8 @@ static int s5p_mfc_alloc_dev_context_buffer_v6(struct s5p_mfc_dev *dev)
mfc_debug_enter();
dev->ctx_buf.size = buf_size->dev_ctx;
ret = s5p_mfc_alloc_priv_buf(dev->mem_dev_l, &dev->ctx_buf);
ret = s5p_mfc_alloc_priv_buf(dev->mem_dev_l, dev->bank1,
&dev->ctx_buf);
if (ret) {
mfc_err("Failed to allocate device context buffer\n");
return ret;