drm/amdgpu: fix UVD/VCE fence handling

We need to return the sequence number to userspace
even when we don't use user fences.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -414,8 +414,6 @@ struct amdgpu_user_fence {
 	struct amdgpu_bo 	*bo;
 	/* write-back address offset to bo start */
 	uint32_t                offset;
-	/* resulting sequence number */
-	uint64_t                sequence;
 };
 
 int amdgpu_fence_driver_init(struct amdgpu_device *adev);
@@ -847,6 +845,8 @@ struct amdgpu_ib {
 	uint32_t			gws_base, gws_size;
 	uint32_t			oa_base, oa_size;
 	uint32_t			flags;
+	/* resulting sequence number */
+	uint64_t			sequence;
 };
 
 enum amdgpu_ring_type {

drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c

@@ -794,7 +794,7 @@ int amdgpu_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
 		goto out;
 	}
 
-	cs->out.handle = parser.uf.sequence;
+	cs->out.handle = parser.ibs[parser.num_ibs - 1].sequence;
 out:
 	amdgpu_cs_parser_fini(&parser, r, true);
 	up_read(&adev->exclusive_lock);

drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c

@@ -88,6 +88,7 @@ int amdgpu_ib_get(struct amdgpu_ring *ring, struct amdgpu_vm *vm,
 	ib->fence = NULL;
 	ib->user = NULL;
 	ib->vm = vm;
+	ib->ctx = NULL;
 	ib->gds_base = 0;
 	ib->gds_size = 0;
 	ib->gws_base = 0;
@@ -214,13 +215,15 @@ int amdgpu_ib_schedule(struct amdgpu_device *adev, unsigned num_ibs,
 		return r;
 	}
 
+	if (ib->ctx)
+		ib->sequence = amdgpu_ctx_add_fence(ib->ctx, ring,
+						    &ib->fence->base);
+
 	/* wrap the last IB with fence */
 	if (ib->user) {
 		uint64_t addr = amdgpu_bo_gpu_offset(ib->user->bo);
-		ib->user->sequence = amdgpu_ctx_add_fence(ib->ctx, ring,
-							  &ib->fence->base);
 		addr += ib->user->offset;
-		amdgpu_ring_emit_fence(ring, addr, ib->user->sequence,
+		amdgpu_ring_emit_fence(ring, addr, ib->sequence,
 				       AMDGPU_FENCE_FLAG_64BIT);
 	}