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drm/radeon/kms: Bailout of blit if error happen & protect with mutex V3

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If an error happen in r600_blit_prepare_copy report it rather
than WARNING and keeping execution. For instance if ib allocation
failed we did just warn about but then latter tried to access
NULL ib ptr causing oops. This patch also protect r600_copy_blit
with a mutex as otherwise one process might overwrite blit temporary
data with new one possibly leading to GPU lockup.

Should partialy or totaly fix:
https://bugzilla.redhat.com/show_bug.cgi?id=553279

V2 failing blit initialization is not fatal, fallback to memcpy when
this happen
V3 init blit before startup as we pin in startup, remove duplicate
code (this one was actualy tested unlike V2)

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Jerome Glisse
2010-01-22 15:19:00 +01:00
committed by Dave Airlie
parent 5ffdb658f6
commit ff82f052d2
4 changed files with 48 additions and 45 deletions
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7
drivers/gpu/drm/radeon/r600_blit_kms.c
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@@ -449,6 +449,7 @@ int r600_blit_init(struct radeon_device *rdev)
u32 packet2s[16];
int num_packet2s = 0;
mutex_init(&rdev->r600_blit.mutex);
rdev->r600_blit.state_offset = 0;
if (rdev->family >= CHIP_RV770)
@@ -557,7 +558,8 @@ int r600_blit_prepare_copy(struct radeon_device *rdev, int size_bytes)
int dwords_per_loop = 76, num_loops;
r = r600_vb_ib_get(rdev);
WARN_ON(r);
if (r)
return r;
/* set_render_target emits 2 extra dwords on rv6xx */
if (rdev->family > CHIP_R600 && rdev->family < CHIP_RV770)
@@ -583,7 +585,8 @@ int r600_blit_prepare_copy(struct radeon_device *rdev, int size_bytes)
ring_size += 5; /* done copy */
ring_size += 7; /* fence emit for done copy */
r = radeon_ring_lock(rdev, ring_size);
WARN_ON(r);
if (r)
return r;
set_default_state(rdev); /* 14 */
set_shaders(rdev); /* 26 */