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drm/amdgpu: add the trailing fence per ring

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The trailing fence for ring is used to track the
completion of preemption.

Acked-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Jack Xiao <Jack.Xiao@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jack Xiao
2019-01-10 14:28:08 +08:00
committed by Alex Deucher
parent dfc9847956
commit ef3e13238b
3 changed files with 27 additions and 5 deletions
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10
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
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@@ -281,6 +281,16 @@ int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring,
return r;
}
r = amdgpu_device_wb_get(adev, &ring->trail_fence_offs);
if (r) {
dev_err(adev->dev,
"(%d) ring trail_fence_offs wb alloc failed\n", r);
return r;
}
ring->trail_fence_gpu_addr =
adev->wb.gpu_addr + (ring->trail_fence_offs * 4);
ring->trail_fence_cpu_addr = &adev->wb.wb[ring->trail_fence_offs];
r = amdgpu_device_wb_get(adev, &ring->cond_exe_offs);
if (r) {
dev_err(adev->dev, "(%d) ring cond_exec_polling wb alloc failed\n", r);