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drm/radeon: allow semaphore emission to fail

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To workaround bugs and/or certain limits it's sometimes
useful to fall back to waiting on fences.

Signed-off-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:
Christian König
2013-11-12 12:58:05 +01:00
committed by Alex Deucher
parent bd80c8ba99
commit 1654b817d8
17 changed files with 194 additions and 150 deletions
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30
drivers/gpu/drm/radeon/radeon_fence.c
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@@ -471,6 +471,36 @@ int radeon_fence_wait_any(struct radeon_device *rdev,
return 0;
}
/**
* radeon_fence_wait_locked - wait for a fence to signal
*
* @fence: radeon fence object
*
* Wait for the requested fence to signal (all asics).
* Returns 0 if the fence has passed, error for all other cases.
*/
int radeon_fence_wait_locked(struct radeon_fence *fence)
{
uint64_t seq[RADEON_NUM_RINGS] = {};
int r;
if (fence == NULL) {
WARN(1, "Querying an invalid fence : %p !\n", fence);
return -EINVAL;
}
seq[fence->ring] = fence->seq;
if (seq[fence->ring] == RADEON_FENCE_SIGNALED_SEQ)
return 0;
r = radeon_fence_wait_seq(fence->rdev, seq, false, false);
if (r)
return r;
fence->seq = RADEON_FENCE_SIGNALED_SEQ;
return 0;
}
/**
* radeon_fence_wait_next_locked - wait for the next fence to signal
*