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drm/radeon: don't leave fence blocked process on failed GPU reset

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Force all fence to signal if GPU reset failed so no process get stuck
on waiting fence.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Jerome Glisse 2012-12-17 10:29:06 -05:00 committed by Alex Deucher
parent 0953e76e91
commit 76903b96ad
3 changed files with 21 additions and 0 deletions
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1
drivers/gpu/drm/radeon/radeon.h
View file

@ -225,6 +225,7 @@ struct radeon_fence {
int radeon_fence_driver_start_ring(struct radeon_device *rdev, int ring);
int radeon_fence_driver_init(struct radeon_device *rdev);
void radeon_fence_driver_fini(struct radeon_device *rdev);
void radeon_fence_driver_force_completion(struct radeon_device *rdev);
int radeon_fence_emit(struct radeon_device *rdev, struct radeon_fence **fence, int ring);
void radeon_fence_process(struct radeon_device *rdev, int ring);
bool radeon_fence_signaled(struct radeon_fence *fence);

1
drivers/gpu/drm/radeon/radeon_device.c
View file

@ -1358,6 +1358,7 @@ int radeon_gpu_reset(struct radeon_device *rdev)
}
}
} else {
radeon_fence_driver_force_completion(rdev);
for (i = 0; i < RADEON_NUM_RINGS; ++i) {
kfree(ring_data[i]);
}

19
drivers/gpu/drm/radeon/radeon_fence.c
View file

@ -868,6 +868,25 @@ void radeon_fence_driver_fini(struct radeon_device *rdev)
mutex_unlock(&rdev->ring_lock);
}
/**
* radeon_fence_driver_force_completion - force all fence waiter to complete
*
* @rdev: radeon device pointer
*
* In case of GPU reset failure make sure no process keep waiting on fence
* that will never complete.
*/
void radeon_fence_driver_force_completion(struct radeon_device *rdev)
{
int ring;
for (ring = 0; ring < RADEON_NUM_RINGS; ring++) {
if (!rdev->fence_drv[ring].initialized)
continue;
radeon_fence_write(rdev, rdev->fence_drv[ring].sync_seq[ring], ring);
}
}
/*
* Fence debugfs