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drm/radeon: more strictly validate the UVD codec

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MPEG 2/4 are only supported since UVD3.

Signed-off-by: Christian König <christian.koenig@amd.com>
CC: stable@vger.kernel.org
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2015-05-07 15:19:24 +02:00 committed by Alex Deucher
parent a1b403da70
commit d52cdfa4a0
1 changed files with 31 additions and 2 deletions
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33
drivers/gpu/drm/radeon/radeon_uvd.c
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@ -396,6 +396,29 @@ static int radeon_uvd_cs_msg_decode(uint32_t *msg, unsigned buf_sizes[])
return 0;
}
static int radeon_uvd_validate_codec(struct radeon_cs_parser *p,
unsigned stream_type)
{
switch (stream_type) {
case 0: /* H264 */
case 1: /* VC1 */
/* always supported */
return 0;
case 3: /* MPEG2 */
case 4: /* MPEG4 */
/* only since UVD 3 */
if (p->rdev->family >= CHIP_PALM)
return 0;
/* fall through */
default:
DRM_ERROR("UVD codec not supported by hardware %d!\n",
stream_type);
return -EINVAL;
}
}
static int radeon_uvd_cs_msg(struct radeon_cs_parser *p, struct radeon_bo *bo,
unsigned offset, unsigned buf_sizes[])
{
@ -440,7 +463,11 @@ static int radeon_uvd_cs_msg(struct radeon_cs_parser *p, struct radeon_bo *bo,
case 0:
/* it's a create msg, calc image size (width * height) */
img_size = msg[7] * msg[8];
r = radeon_uvd_validate_codec(p, msg[4]);
radeon_bo_kunmap(bo);
if (r)
return r;
/* try to alloc a new handle */
for (i = 0; i < RADEON_MAX_UVD_HANDLES; ++i) {
@ -460,8 +487,10 @@ static int radeon_uvd_cs_msg(struct radeon_cs_parser *p, struct radeon_bo *bo,
return -EINVAL;
case 1:
/* it's a decode msg, calc buffer sizes */
r = radeon_uvd_cs_msg_decode(msg, buf_sizes);
/* it's a decode msg, validate codec and calc buffer sizes */
r = radeon_uvd_validate_codec(p, msg[4]);
if (!r)
r = radeon_uvd_cs_msg_decode(msg, buf_sizes);
radeon_bo_kunmap(bo);
if (r)
return r;