drm/omapdrm: Introduce GEM object functions

GEM object functions deprecate several similar callback interfaces in
struct drm_driver. This patch replaces the per-driver callbacks with
per-instance callbacks in omapdrm.

v2:
	* make omap_gem_free_object() static (Tomi)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200923102159.24084-12-tzimmermann@suse.de

drivers/gpu/drm/omapdrm/omap_drv.c

@@ -521,12 +521,6 @@ static int dev_open(struct drm_device *dev, struct drm_file *file)
 	return 0;
 }
 
-static const struct vm_operations_struct omap_gem_vm_ops = {
-	.fault = omap_gem_fault,
-	.open = drm_gem_vm_open,
-	.close = drm_gem_vm_close,
-};
-
 static const struct file_operations omapdriver_fops = {
 	.owner = THIS_MODULE,
 	.open = drm_open,
@@ -549,10 +543,7 @@ static struct drm_driver omap_drm_driver = {
 #endif
 	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
-	.gem_prime_export = omap_gem_prime_export,
 	.gem_prime_import = omap_gem_prime_import,
-	.gem_free_object_unlocked = omap_gem_free_object,
-	.gem_vm_ops = &omap_gem_vm_ops,
 	.dumb_create = omap_gem_dumb_create,
 	.dumb_map_offset = omap_gem_dumb_map_offset,
 	.ioctls = ioctls,

drivers/gpu/drm/omapdrm/omap_gem.c

@@ -487,7 +487,7 @@ static vm_fault_t omap_gem_fault_2d(struct drm_gem_object *obj,
  * vma->vm_private_data points to the GEM object that is backing this
  * mapping.
  */
-vm_fault_t omap_gem_fault(struct vm_fault *vmf)
+static vm_fault_t omap_gem_fault(struct vm_fault *vmf)
 {
 	struct vm_area_struct *vma = vmf->vma;
 	struct drm_gem_object *obj = vma->vm_private_data;
@@ -1089,7 +1089,7 @@ void omap_gem_describe_objects(struct list_head *list, struct seq_file *m)
  * Constructor & Destructor
  */
 
-void omap_gem_free_object(struct drm_gem_object *obj)
+static void omap_gem_free_object(struct drm_gem_object *obj)
 {
 	struct drm_device *dev = obj->dev;
 	struct omap_drm_private *priv = dev->dev_private;
@@ -1169,6 +1169,18 @@ static bool omap_gem_validate_flags(struct drm_device *dev, u32 flags)
 	return true;
 }
 
+static const struct vm_operations_struct omap_gem_vm_ops = {
+	.fault = omap_gem_fault,
+	.open = drm_gem_vm_open,
+	.close = drm_gem_vm_close,
+};
+
+static const struct drm_gem_object_funcs omap_gem_object_funcs = {
+	.free = omap_gem_free_object,
+	.export = omap_gem_prime_export,
+	.vm_ops = &omap_gem_vm_ops,
+};
+
 /* GEM buffer object constructor */
 struct drm_gem_object *omap_gem_new(struct drm_device *dev,
 		union omap_gem_size gsize, u32 flags)
@@ -1236,6 +1248,8 @@ struct drm_gem_object *omap_gem_new(struct drm_device *dev,
 		size = PAGE_ALIGN(gsize.bytes);
 	}
 
+	obj->funcs = &omap_gem_object_funcs;
+
 	/* Initialize the GEM object. */
 	if (!(flags & OMAP_BO_MEM_SHMEM)) {
 		drm_gem_private_object_init(dev, obj, size);

drivers/gpu/drm/omapdrm/omap_gem.h

@@ -48,7 +48,6 @@ struct drm_gem_object *omap_gem_new_dmabuf(struct drm_device *dev, size_t size,
 		struct sg_table *sgt);
 int omap_gem_new_handle(struct drm_device *dev, struct drm_file *file,
 		union omap_gem_size gsize, u32 flags, u32 *handle);
-void omap_gem_free_object(struct drm_gem_object *obj);
 void *omap_gem_vaddr(struct drm_gem_object *obj);
 
 /* Dumb Buffers Interface */
@@ -69,7 +68,6 @@ struct dma_buf *omap_gem_prime_export(struct drm_gem_object *obj, int flags);
 struct drm_gem_object *omap_gem_prime_import(struct drm_device *dev,
 		struct dma_buf *buffer);
 
-vm_fault_t omap_gem_fault(struct vm_fault *vmf);
 int omap_gem_roll(struct drm_gem_object *obj, u32 roll);
 void omap_gem_cpu_sync_page(struct drm_gem_object *obj, int pgoff);
 void omap_gem_dma_sync_buffer(struct drm_gem_object *obj,