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drm/radeon: check VCE relocation buffer range v3
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v2 (chk): fix image size storage
v3 (chk): fix UV size calculation

Signed-off-by: Leo Liu <leo.liu@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
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Leo Liu authored and Christian König committed May 20, 2014
1 parent 5440925 commit 2fc5703
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Showing 2 changed files with 102 additions and 31 deletions.
3 changes: 2 additions & 1 deletion drivers/gpu/drm/radeon/radeon.h
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Original file line number Diff line number Diff line change
Expand Up @@ -1642,6 +1642,7 @@ struct radeon_vce {
unsigned fb_version;
atomic_t handles[RADEON_MAX_VCE_HANDLES];
struct drm_file *filp[RADEON_MAX_VCE_HANDLES];
unsigned img_size[RADEON_MAX_VCE_HANDLES];
struct delayed_work idle_work;
};

Expand All @@ -1655,7 +1656,7 @@ int radeon_vce_get_destroy_msg(struct radeon_device *rdev, int ring,
uint32_t handle, struct radeon_fence **fence);
void radeon_vce_free_handles(struct radeon_device *rdev, struct drm_file *filp);
void radeon_vce_note_usage(struct radeon_device *rdev);
int radeon_vce_cs_reloc(struct radeon_cs_parser *p, int lo, int hi);
int radeon_vce_cs_reloc(struct radeon_cs_parser *p, int lo, int hi, unsigned size);
int radeon_vce_cs_parse(struct radeon_cs_parser *p);
bool radeon_vce_semaphore_emit(struct radeon_device *rdev,
struct radeon_ring *ring,
Expand Down
130 changes: 100 additions & 30 deletions drivers/gpu/drm/radeon/radeon_vce.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -443,13 +443,16 @@ int radeon_vce_get_destroy_msg(struct radeon_device *rdev, int ring,
* @p: parser context
* @lo: address of lower dword
* @hi: address of higher dword
* @size: size of checker for relocation buffer
*
* Patch relocation inside command stream with real buffer address
*/
int radeon_vce_cs_reloc(struct radeon_cs_parser *p, int lo, int hi)
int radeon_vce_cs_reloc(struct radeon_cs_parser *p, int lo, int hi,
unsigned size)
{
struct radeon_cs_chunk *relocs_chunk;
uint64_t offset;
struct radeon_cs_reloc *reloc;
uint64_t start, end, offset;
unsigned idx;

relocs_chunk = &p->chunks[p->chunk_relocs_idx];
Expand All @@ -462,14 +465,59 @@ int radeon_vce_cs_reloc(struct radeon_cs_parser *p, int lo, int hi)
return -EINVAL;
}

offset += p->relocs_ptr[(idx / 4)]->gpu_offset;
reloc = p->relocs_ptr[(idx / 4)];
start = reloc->gpu_offset;
end = start + radeon_bo_size(reloc->robj);
start += offset;

p->ib.ptr[lo] = offset & 0xFFFFFFFF;
p->ib.ptr[hi] = offset >> 32;
p->ib.ptr[lo] = start & 0xFFFFFFFF;
p->ib.ptr[hi] = start >> 32;

if (end <= start) {
DRM_ERROR("invalid reloc offset %llX!\n", offset);
return -EINVAL;
}
if ((end - start) < size) {
DRM_ERROR("buffer to small (%d / %d)!\n",
(unsigned)(end - start), size);
return -EINVAL;
}

return 0;
}

/**
* radeon_vce_validate_handle - validate stream handle
*
* @p: parser context
* @handle: handle to validate
*
* Validates the handle and return the found session index or -EINVAL
* we we don't have another free session index.
*/
int radeon_vce_validate_handle(struct radeon_cs_parser *p, uint32_t handle)
{
unsigned i;

/* validate the handle */
for (i = 0; i < RADEON_MAX_VCE_HANDLES; ++i) {
if (atomic_read(&p->rdev->vce.handles[i]) == handle)
return i;
}

/* handle not found try to alloc a new one */
for (i = 0; i < RADEON_MAX_VCE_HANDLES; ++i) {
if (!atomic_cmpxchg(&p->rdev->vce.handles[i], 0, handle)) {
p->rdev->vce.filp[i] = p->filp;
p->rdev->vce.img_size[i] = 0;
return i;
}
}

DRM_ERROR("No more free VCE handles!\n");
return -EINVAL;
}

/**
* radeon_vce_cs_parse - parse and validate the command stream
*
Expand All @@ -478,8 +526,10 @@ int radeon_vce_cs_reloc(struct radeon_cs_parser *p, int lo, int hi)
*/
int radeon_vce_cs_parse(struct radeon_cs_parser *p)
{
uint32_t handle = 0;
bool destroy = false;
int session_idx = -1;
bool destroyed = false;
uint32_t tmp, handle = 0;
uint32_t *size = &tmp;
int i, r;

while (p->idx < p->chunks[p->chunk_ib_idx].length_dw) {
Expand All @@ -491,13 +541,29 @@ int radeon_vce_cs_parse(struct radeon_cs_parser *p)
return -EINVAL;
}

if (destroyed) {
DRM_ERROR("No other command allowed after destroy!\n");
return -EINVAL;
}

switch (cmd) {
case 0x00000001: // session
handle = radeon_get_ib_value(p, p->idx + 2);
session_idx = radeon_vce_validate_handle(p, handle);
if (session_idx < 0)
return session_idx;
size = &p->rdev->vce.img_size[session_idx];
break;

case 0x00000002: // task info
break;

case 0x01000001: // create
*size = radeon_get_ib_value(p, p->idx + 8) *
radeon_get_ib_value(p, p->idx + 10) *
8 * 3 / 2;
break;

case 0x04000001: // config extension
case 0x04000002: // pic control
case 0x04000005: // rate control
Expand All @@ -506,23 +572,39 @@ int radeon_vce_cs_parse(struct radeon_cs_parser *p)
break;

case 0x03000001: // encode
r = radeon_vce_cs_reloc(p, p->idx + 10, p->idx + 9);
r = radeon_vce_cs_reloc(p, p->idx + 10, p->idx + 9,
*size);
if (r)
return r;

r = radeon_vce_cs_reloc(p, p->idx + 12, p->idx + 11);
r = radeon_vce_cs_reloc(p, p->idx + 12, p->idx + 11,
*size / 3);
if (r)
return r;
break;

case 0x02000001: // destroy
destroy = true;
destroyed = true;
break;

case 0x05000001: // context buffer
r = radeon_vce_cs_reloc(p, p->idx + 3, p->idx + 2,
*size * 2);
if (r)
return r;
break;

case 0x05000004: // video bitstream buffer
tmp = radeon_get_ib_value(p, p->idx + 4);
r = radeon_vce_cs_reloc(p, p->idx + 3, p->idx + 2,
tmp);
if (r)
return r;
break;

case 0x05000005: // feedback buffer
r = radeon_vce_cs_reloc(p, p->idx + 3, p->idx + 2);
r = radeon_vce_cs_reloc(p, p->idx + 3, p->idx + 2,
4096);
if (r)
return r;
break;
Expand All @@ -532,33 +614,21 @@ int radeon_vce_cs_parse(struct radeon_cs_parser *p)
return -EINVAL;
}

if (session_idx == -1) {
DRM_ERROR("no session command at start of IB\n");
return -EINVAL;
}

p->idx += len / 4;
}

if (destroy) {
if (destroyed) {
/* IB contains a destroy msg, free the handle */
for (i = 0; i < RADEON_MAX_VCE_HANDLES; ++i)
atomic_cmpxchg(&p->rdev->vce.handles[i], handle, 0);

return 0;
}

/* create or encode, validate the handle */
for (i = 0; i < RADEON_MAX_VCE_HANDLES; ++i) {
if (atomic_read(&p->rdev->vce.handles[i]) == handle)
return 0;
}

/* handle not found try to alloc a new one */
for (i = 0; i < RADEON_MAX_VCE_HANDLES; ++i) {
if (!atomic_cmpxchg(&p->rdev->vce.handles[i], 0, handle)) {
p->rdev->vce.filp[i] = p->filp;
return 0;
}
}

DRM_ERROR("No more free VCE handles!\n");
return -EINVAL;
return 0;
}

/**
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