1 files changed, 64 insertions, 11 deletions

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 44a948b80ee1..ee811764c3df 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -114,22 +114,32 @@ drm_gem_init(struct drm_device *dev)
 }
 
 /**
- * drm_gem_object_init - initialize an allocated shmem-backed GEM object
+ * drm_gem_object_init_with_mnt - initialize an allocated shmem-backed GEM
+ * object in a given shmfs mountpoint
+ *
  * @dev: drm_device the object should be initialized for
  * @obj: drm_gem_object to initialize
  * @size: object size
+ * @gemfs: tmpfs mount where the GEM object will be created. If NULL, use
+ * the usual tmpfs mountpoint (`shm_mnt`).
  *
  * Initialize an already allocated GEM object of the specified size with
  * shmfs backing store.
  */
-int drm_gem_object_init(struct drm_device *dev,
-			struct drm_gem_object *obj, size_t size)
+int drm_gem_object_init_with_mnt(struct drm_device *dev,
+				 struct drm_gem_object *obj, size_t size,
+				 struct vfsmount *gemfs)
 {
 	struct file *filp;
 
 	drm_gem_private_object_init(dev, obj, size);
 
-	filp = shmem_file_setup("drm mm object", size, VM_NORESERVE);
+	if (gemfs)
+		filp = shmem_file_setup_with_mnt(gemfs, "drm mm object", size,
+						 VM_NORESERVE);
+	else
+		filp = shmem_file_setup("drm mm object", size, VM_NORESERVE);
+
 	if (IS_ERR(filp))
 		return PTR_ERR(filp);
 
@@ -137,6 +147,22 @@ int drm_gem_object_init(struct drm_device *dev,
 
 	return 0;
 }
+EXPORT_SYMBOL(drm_gem_object_init_with_mnt);
+
+/**
+ * drm_gem_object_init - initialize an allocated shmem-backed GEM object
+ * @dev: drm_device the object should be initialized for
+ * @obj: drm_gem_object to initialize
+ * @size: object size
+ *
+ * Initialize an already allocated GEM object of the specified size with
+ * shmfs backing store.
+ */
+int drm_gem_object_init(struct drm_device *dev, struct drm_gem_object *obj,
+			size_t size)
+{
+	return drm_gem_object_init_with_mnt(dev, obj, size, NULL);
+}
 EXPORT_SYMBOL(drm_gem_object_init);
 
 /**
@@ -689,7 +715,6 @@ static int objects_lookup(struct drm_file *filp, u32 *handle, int count,
  * For a single handle lookup, use drm_gem_object_lookup().
  *
  * Returns:
- *
  * @objs filled in with GEM object pointers. Returned GEM objects need to be
  * released with drm_gem_object_put(). -ENOENT is returned on a lookup
  * failure. 0 is returned on success.
@@ -737,12 +762,11 @@ EXPORT_SYMBOL(drm_gem_objects_lookup);
  * @filp: DRM file private date
  * @handle: userspace handle
  *
- * Returns:
+ * If looking up an array of handles, use drm_gem_objects_lookup().
  *
+ * Returns:
  * A reference to the object named by the handle if such exists on @filp, NULL
  * otherwise.
- *
- * If looking up an array of handles, use drm_gem_objects_lookup().
  */
 struct drm_gem_object *
 drm_gem_object_lookup(struct drm_file *filp, u32 handle)
@@ -763,7 +787,6 @@ EXPORT_SYMBOL(drm_gem_object_lookup);
  * @timeout: timeout value in jiffies or zero to return immediately
  *
  * Returns:
- *
  * Returns -ERESTARTSYS if interrupted, 0 if the wait timed out, or
  * greater than 0 on success.
  */
@@ -1161,7 +1184,7 @@ void drm_gem_print_info(struct drm_printer *p, unsigned int indent,
 		obj->funcs->print_info(p, indent, obj);
 }
 
-int drm_gem_pin(struct drm_gem_object *obj)
+int drm_gem_pin_locked(struct drm_gem_object *obj)
 {
 	if (obj->funcs->pin)
 		return obj->funcs->pin(obj);
@@ -1169,12 +1192,30 @@ int drm_gem_pin(struct drm_gem_object *obj)
 	return 0;
 }
 
-void drm_gem_unpin(struct drm_gem_object *obj)
+void drm_gem_unpin_locked(struct drm_gem_object *obj)
 {
 	if (obj->funcs->unpin)
 		obj->funcs->unpin(obj);
 }
 
+int drm_gem_pin(struct drm_gem_object *obj)
+{
+	int ret;
+
+	dma_resv_lock(obj->resv, NULL);
+	ret = drm_gem_pin_locked(obj);
+	dma_resv_unlock(obj->resv);
+
+	return ret;
+}
+
+void drm_gem_unpin(struct drm_gem_object *obj)
+{
+	dma_resv_lock(obj->resv, NULL);
+	drm_gem_unpin_locked(obj);
+	dma_resv_unlock(obj->resv);
+}
+
 int drm_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map)
 {
 	int ret;
@@ -1209,6 +1250,18 @@ void drm_gem_vunmap(struct drm_gem_object *obj, struct iosys_map *map)
 }
 EXPORT_SYMBOL(drm_gem_vunmap);
 
+void drm_gem_lock(struct drm_gem_object *obj)
+{
+	dma_resv_lock(obj->resv, NULL);
+}
+EXPORT_SYMBOL(drm_gem_lock);
+
+void drm_gem_unlock(struct drm_gem_object *obj)
+{
+	dma_resv_unlock(obj->resv);
+}
+EXPORT_SYMBOL(drm_gem_unlock);
+
 int drm_gem_vmap_unlocked(struct drm_gem_object *obj, struct iosys_map *map)
 {
 	int ret;