diff options
| author | Xiangliang.Yu <Xiangliang.Yu@amd.com> | 2017-09-13 10:58:19 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-09-26 15:14:02 -0400 |
| commit | 3e4b0bd96092bbf9c5a538916a61faa5eca8e9cb (patch) | |
| tree | 73721971719c15832f932a8d4b6811af29508fde /drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c | |
| parent | e33dac39bcf9978061df95f1510b2ec6bfab07fc (diff) | |
drm/amdgpu/sdma3: set wptr shadow atomically
Port it from sdma4 for wptr polling usage.
Signed-off-by: Xiangliang.Yu <Xiangliang.Yu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c index b7d69ab9a94a..728c0d8e849b 100644 --- a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c @@ -379,8 +379,10 @@ static void sdma_v3_0_ring_set_wptr(struct amdgpu_ring *ring) struct amdgpu_device *adev = ring->adev; if (ring->use_doorbell) { + u32 *wb = (u32 *)&adev->wb.wb[ring->wptr_offs]; + /* XXX check if swapping is necessary on BE */ - adev->wb.wb[ring->wptr_offs] = lower_32_bits(ring->wptr) << 2; + WRITE_ONCE(*wb, (lower_32_bits(ring->wptr) << 2)); WDOORBELL32(ring->doorbell_index, lower_32_bits(ring->wptr) << 2); } else { int me = (ring == &ring->adev->sdma.instance[0].ring) ? 0 : 1; |