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drm/amdgpu: evict vram when gpu reset 

On workstation cards with ECC vram, the entirety of vram is cleared to 0
on asic init to set the ECC status correctly.  On non ECC boards, I don't
think they do any explicit clearing, but the vram controller is reset
which may cause issues with the data there.

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Chunming Zhou 2016-06-12 15:43:20 +08:00 committed by Alex Deucher
parent 0875dc9e80
commit 8b2ac10320
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@ -1896,6 +1896,9 @@ int amdgpu_gpu_reset(struct amdgpu_device *adev)
atomic_inc(&adev->gpu_reset_counter); atomic_inc(&adev->gpu_reset_counter);
/* evict vram memory */
amdgpu_bo_evict_vram(adev);
/* block scheduler */ /* block scheduler */
for (i = 0; i < AMDGPU_MAX_RINGS; ++i) { for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
struct amdgpu_ring *ring = adev->rings[i]; struct amdgpu_ring *ring = adev->rings[i];
@ -1904,6 +1907,7 @@ int amdgpu_gpu_reset(struct amdgpu_device *adev)
continue; continue;
kthread_park(ring->sched.thread); kthread_park(ring->sched.thread);
} }
/* block TTM */ /* block TTM */
resched = ttm_bo_lock_delayed_workqueue(&adev->mman.bdev); resched = ttm_bo_lock_delayed_workqueue(&adev->mman.bdev);