diff options
| author | Alex Sierra <alex.sierra@amd.com> | 2023-04-24 14:27:26 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-06-09 09:39:06 -0400 |
| commit | 6e87c4229513904295674b84b6e2d12951567191 (patch) | |
| tree | 05a653ef80a828c1bd1d63ee6a49608708c338d9 | |
| parent | 17d62410aec363ec972f532fed5aba89b3f59ae7 (diff) | |
| download | linux-stable-6e87c4229513904295674b84b6e2d12951567191.tar.gz linux-stable-6e87c4229513904295674b84b6e2d12951567191.tar.bz2 linux-stable-6e87c4229513904295674b84b6e2d12951567191.zip | |
drm/amdgpu: improve wait logic at fence polling
Accomplish this by reading the seq number right away instead of sleep
for 5us. There are certain cases where the fence is ready almost
immediately. Sleep number granularity was also reduced as the majority
of the kiq tlb flush takes between 2us to 6us.
Signed-off-by: Alex Sierra <alex.sierra@amd.com>
Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c index 1994eafd3e71..b7d648dd0170 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c @@ -376,14 +376,11 @@ signed long amdgpu_fence_wait_polling(struct amdgpu_ring *ring, uint32_t wait_seq, signed long timeout) { - uint32_t seq; - - do { - seq = amdgpu_fence_read(ring); - udelay(5); - timeout -= 5; - } while ((int32_t)(wait_seq - seq) > 0 && timeout > 0); + while ((int32_t)(wait_seq - amdgpu_fence_read(ring)) > 0 && timeout > 0) { + udelay(2); + timeout -= 2; + } return timeout > 0 ? timeout : 0; } /** |