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drm/radeon: fix CP semaphores on CIK

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The CP semaphore queue on CIK has a bug that triggers if uncompleted
waits use the same address while a signal is still pending. Work around
this by using different addresses for each sync.

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
2014-02-18 11:37:20 +01:00
committed by Alex Deucher
parent ebc54ffe1c
commit 8f53492f86
3 changed files with 20 additions and 5 deletions
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4
drivers/gpu/drm/radeon/radeon.h
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@@ -135,6 +135,9 @@ extern int radeon_hard_reset;
/* R600+ */
#define R600_RING_TYPE_UVD_INDEX 5
/* number of hw syncs before falling back on blocking */
#define RADEON_NUM_SYNCS 4
/* hardcode those limit for now */
#define RADEON_VA_IB_OFFSET (1 << 20)
#define RADEON_VA_RESERVED_SIZE (8 << 20)
@@ -554,7 +557,6 @@ int radeon_mode_dumb_mmap(struct drm_file *filp,
/*
* Semaphores.
*/
/* everything here is constant */
struct radeon_semaphore {
struct radeon_sa_bo *sa_bo;
signed waiters;