diff options
| author | Yintian Tao <yttao@amd.com> | 2020-04-23 12:05:54 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-04-24 11:42:11 -0400 |
| commit | 04e4e2e9558326316cf3e32d46cca83cc3861ef0 (patch) | |
| tree | d490fb722bfb5b8a59dc288505fd6544e46d45ef /drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | |
| parent | 312a79b6eafe5c45e3e232506a4a6e97d7cdbba4 (diff) | |
drm/amdgpu: protect ring overrun
Wait for the oldest sequence on the ring
to be signaled in order to make sure there
will be no command overrun.
v2: fix coding stype and remove abs operation
v3: remove the initialization of variable r
Signed-off-by: Yintian Tao <yttao@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c index 7531527067df..d878fe7fee51 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c @@ -192,14 +192,22 @@ int amdgpu_fence_emit(struct amdgpu_ring *ring, struct dma_fence **f, * Used For polling fence. * Returns 0 on success, -ENOMEM on failure. */ -int amdgpu_fence_emit_polling(struct amdgpu_ring *ring, uint32_t *s) +int amdgpu_fence_emit_polling(struct amdgpu_ring *ring, uint32_t *s, + uint32_t timeout) { uint32_t seq; + signed long r; if (!s) return -EINVAL; seq = ++ring->fence_drv.sync_seq; + r = amdgpu_fence_wait_polling(ring, + seq - ring->fence_drv.num_fences_mask, + timeout); + if (r < 1) + return -ETIMEDOUT; + amdgpu_ring_emit_fence(ring, ring->fence_drv.gpu_addr, seq, 0); |