amdgpu/cs: split out fence dependency checking (v2)

This just splits out the fence depenency checking into it's
own function to make it easier to add semaphore dependencies.

v2: rebase onto other changes.

v1-Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -923,53 +923,44 @@ static int amdgpu_cs_ib_fill(struct amdgpu_device *adev,
 	return 0;
 }
 
-static int amdgpu_cs_dependencies(struct amdgpu_device *adev,
-				  struct amdgpu_cs_parser *p)
+static int amdgpu_cs_process_fence_dep(struct amdgpu_cs_parser *p,
+				       struct amdgpu_cs_chunk *chunk)
 {
 	struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
-	int i, j, r;
-
-	for (i = 0; i < p->nchunks; ++i) {
-		struct drm_amdgpu_cs_chunk_dep *deps;
-		struct amdgpu_cs_chunk *chunk;
 	unsigned num_deps;
-
-		chunk = &p->chunks[i];
-
-		if (chunk->chunk_id != AMDGPU_CHUNK_ID_DEPENDENCIES)
-			continue;
+	int i, r;
+	struct drm_amdgpu_cs_chunk_dep *deps;
 
 	deps = (struct drm_amdgpu_cs_chunk_dep *)chunk->kdata;
 	num_deps = chunk->length_dw * 4 /
 		sizeof(struct drm_amdgpu_cs_chunk_dep);
 
-		for (j = 0; j < num_deps; ++j) {
+	for (i = 0; i < num_deps; ++i) {
 		struct amdgpu_ring *ring;
 		struct amdgpu_ctx *ctx;
 		struct dma_fence *fence;
 
-			ctx = amdgpu_ctx_get(fpriv, deps[j].ctx_id);
+		ctx = amdgpu_ctx_get(fpriv, deps[i].ctx_id);
 		if (ctx == NULL)
 			return -EINVAL;
 
-			r = amdgpu_queue_mgr_map(adev, &ctx->queue_mgr,
-						 deps[j].ip_type,
-						 deps[j].ip_instance,
-						 deps[j].ring, &ring);
+		r = amdgpu_queue_mgr_map(p->adev, &ctx->queue_mgr,
+					 deps[i].ip_type,
+					 deps[i].ip_instance,
+					 deps[i].ring, &ring);
 		if (r) {
 			amdgpu_ctx_put(ctx);
 			return r;
 		}
 
 		fence = amdgpu_ctx_get_fence(ctx, ring,
-						     deps[j].handle);
+					     deps[i].handle);
 		if (IS_ERR(fence)) {
 			r = PTR_ERR(fence);
 			amdgpu_ctx_put(ctx);
 			return r;
-
 		} else if (fence) {
-				r = amdgpu_sync_fence(adev, &p->job->sync,
+			r = amdgpu_sync_fence(p->adev, &p->job->sync,
 					      fence);
 			dma_fence_put(fence);
 			amdgpu_ctx_put(ctx);
@@ -977,6 +968,24 @@ static int amdgpu_cs_dependencies(struct amdgpu_device *adev,
 				return r;
 		}
 	}
+	return 0;
+}
+
+static int amdgpu_cs_dependencies(struct amdgpu_device *adev,
+				  struct amdgpu_cs_parser *p)
+{
+	int i, r;
+
+	for (i = 0; i < p->nchunks; ++i) {
+		struct amdgpu_cs_chunk *chunk;
+
+		chunk = &p->chunks[i];
+
+		if (chunk->chunk_id == AMDGPU_CHUNK_ID_DEPENDENCIES) {
+			r = amdgpu_cs_process_fence_dep(p, chunk);
+			if (r)
+				return r;
+		}
 	}
 
 	return 0;