drm/armada: 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 armada.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Russell King <rmk+kernel@armlinux.org.uk>
Acked-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200923102159.24084-3-tzimmermann@suse.de

drivers/gpu/drm/armada/armada_drv.c

@@ -37,13 +37,10 @@ DEFINE_DRM_GEM_FOPS(armada_drm_fops);
 
 static struct drm_driver armada_drm_driver = {
 	.lastclose		= drm_fb_helper_lastclose,
-	.gem_free_object_unlocked = armada_gem_free_object,
 	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
 	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
-	.gem_prime_export	= armada_gem_prime_export,
 	.gem_prime_import	= armada_gem_prime_import,
 	.dumb_create		= armada_gem_dumb_create,
-	.gem_vm_ops		= &armada_gem_vm_ops,
 	.major			= 1,
 	.minor			= 0,
 	.name			= "armada-drm",

drivers/gpu/drm/armada/armada_gem.c

@@ -25,7 +25,7 @@ static vm_fault_t armada_gem_vm_fault(struct vm_fault *vmf)
 	return vmf_insert_pfn(vmf->vma, vmf->address, pfn);
 }
 
-const struct vm_operations_struct armada_gem_vm_ops = {
+static const struct vm_operations_struct armada_gem_vm_ops = {
 	.fault	= armada_gem_vm_fault,
 	.open	= drm_gem_vm_open,
 	.close	= drm_gem_vm_close,
@@ -184,6 +184,12 @@ armada_gem_map_object(struct drm_device *dev, struct armada_gem_object *dobj)
 	return dobj->addr;
 }
 
+static const struct drm_gem_object_funcs armada_gem_object_funcs = {
+	.free = armada_gem_free_object,
+	.export = armada_gem_prime_export,
+	.vm_ops = &armada_gem_vm_ops,
+};
+
 struct armada_gem_object *
 armada_gem_alloc_private_object(struct drm_device *dev, size_t size)
 {
@@ -195,6 +201,8 @@ armada_gem_alloc_private_object(struct drm_device *dev, size_t size)
 	if (!obj)
 		return NULL;
 
+	obj->obj.funcs = &armada_gem_object_funcs;
+
 	drm_gem_private_object_init(dev, &obj->obj, size);
 
 	DRM_DEBUG_DRIVER("alloc private obj %p size %zu\n", obj, size);
@@ -214,6 +222,8 @@ static struct armada_gem_object *armada_gem_alloc_object(struct drm_device *dev,
 	if (!obj)
 		return NULL;
 
+	obj->obj.funcs = &armada_gem_object_funcs;
+
 	if (drm_gem_object_init(dev, &obj->obj, size)) {
 		kfree(obj);
 		return NULL;

drivers/gpu/drm/armada/armada_gem.h

@@ -21,8 +21,6 @@ struct armada_gem_object {
 	void			*update_data;
 };
 
-extern const struct vm_operations_struct armada_gem_vm_ops;
-
 #define drm_to_armada_gem(o) container_of(o, struct armada_gem_object, obj)
 
 void armada_gem_free_object(struct drm_gem_object *);