iris/bufmgr: Move iris_bo_reference into hash_find_bo, rename it

Everybody importing an external buffer was looking it up in the hash
table, then referencing it.  We can just do that in the helper instead,
which also gives us a convenient spot to stash extra code shortly.

diff --git a/src/gallium/drivers/iris/iris_bufmgr.c b/src/gallium/drivers/iris/iris_bufmgr.c
index 32adae53670fda1eae3274ba79ebda6c925bee5c..0986e2eab8596068923a3e46a467b8af6d9544fb 100644 (file)
--- a/src/gallium/drivers/iris/iris_bufmgr.c
+++ b/src/gallium/drivers/iris/iris_bufmgr.c
@@ -173,10 +173,18 @@ key_uint_equal(const void *a, const void *b)
 }
 
 static struct iris_bo *
-hash_find_bo(struct hash_table *ht, unsigned int key)
+find_and_ref_external_bo(struct hash_table *ht, unsigned int key)
 {
    struct hash_entry *entry = _mesa_hash_table_search(ht, &key);
-   return entry ? (struct iris_bo *) entry->data : NULL;
+   struct iris_bo *bo = entry ? entry->data : NULL;
+
+   if (bo) {
+      assert(bo->external);
+
+      iris_bo_reference(bo);
+   }
+
+   return bo;
 }
 
 /**
@@ -628,11 +636,9 @@ iris_bo_gem_create_from_name(struct iris_bufmgr *bufmgr,
     * provides a sufficiently fast match.
     */
    mtx_lock(&bufmgr->lock);
-   bo = hash_find_bo(bufmgr->name_table, handle);
-   if (bo) {
-      iris_bo_reference(bo);
+   bo = find_and_ref_external_bo(bufmgr->name_table, handle);
+   if (bo)
       goto out;
-   }
 
    struct drm_gem_open open_arg = { .name = handle };
    int ret = gen_ioctl(bufmgr->fd, DRM_IOCTL_GEM_OPEN, &open_arg);
@@ -646,11 +652,9 @@ iris_bo_gem_create_from_name(struct iris_bufmgr *bufmgr,
     * object from the kernel before by looking through the list
     * again for a matching gem_handle
     */
-   bo = hash_find_bo(bufmgr->handle_table, open_arg.handle);
-   if (bo) {
-      iris_bo_reference(bo);
+   bo = find_and_ref_external_bo(bufmgr->handle_table, open_arg.handle);
+   if (bo)
       goto out;
-   }
 
    bo = bo_calloc();
    if (!bo)
@@ -1275,11 +1279,9 @@ iris_bo_import_dmabuf(struct iris_bufmgr *bufmgr, int prime_fd)
     * for named buffers, we must not create two bo's pointing at the same
     * kernel object
     */
-   bo = hash_find_bo(bufmgr->handle_table, handle);
-   if (bo) {
-      iris_bo_reference(bo);
+   bo = find_and_ref_external_bo(bufmgr->handle_table, handle);
+   if (bo)
       goto out;
-   }
 
    bo = bo_calloc();
    if (!bo)