drm/v3d: Use the new shmem helpers to reduce driver boilerplate.

The new shmem helpers from Noralf and Rob abstract out a bunch of our
BO creation and mapping code.

v2: Use the new sgt getter, and flag pages as dirty before freeing.
v3: Remove the mismatched put_pages.

Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20190314163451.13431-1-eric@anholt.net
Reviewed-by: Rob Herring <robh@kernel.org> (v2)

drivers/gpu/drm/v3d/v3d_drv.c

@@ -161,17 +161,7 @@ v3d_postclose(struct drm_device *dev, struct drm_file *file)
 	kfree(v3d_priv);
 }
 
-static const struct file_operations v3d_drm_fops = {
-	.owner = THIS_MODULE,
-	.open = drm_open,
-	.release = drm_release,
-	.unlocked_ioctl = drm_ioctl,
-	.mmap = v3d_mmap,
-	.poll = drm_poll,
-	.read = drm_read,
-	.compat_ioctl = drm_compat_ioctl,
-	.llseek = noop_llseek,
-};
+DEFINE_DRM_GEM_SHMEM_FOPS(v3d_drm_fops);
 
 /* DRM_AUTH is required on SUBMIT_CL for now, while we don't have GMP
  * protection between clients.  Note that render nodes would be be
@@ -189,12 +179,6 @@ static const struct drm_ioctl_desc v3d_drm_ioctls[] = {
 	DRM_IOCTL_DEF_DRV(V3D_SUBMIT_TFU, v3d_submit_tfu_ioctl, DRM_RENDER_ALLOW | DRM_AUTH),
 };
 
-static const struct vm_operations_struct v3d_vm_ops = {
-	.fault = v3d_gem_fault,
-	.open = drm_gem_vm_open,
-	.close = drm_gem_vm_close,
-};
-
 static struct drm_driver v3d_drm_driver = {
 	.driver_features = (DRIVER_GEM |
 			    DRIVER_RENDER |
@@ -208,16 +192,11 @@ static struct drm_driver v3d_drm_driver = {
 	.debugfs_init = v3d_debugfs_init,
 #endif
 
-	.gem_free_object_unlocked = v3d_free_object,
-	.gem_vm_ops = &v3d_vm_ops,
-
+	.gem_create_object = v3d_create_object,
 	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
-	.gem_prime_import = drm_gem_prime_import,
-	.gem_prime_export = drm_gem_prime_export,
-	.gem_prime_get_sg_table	= v3d_prime_get_sg_table,
 	.gem_prime_import_sg_table = v3d_prime_import_sg_table,
-	.gem_prime_mmap = v3d_prime_mmap,
+	.gem_prime_mmap = drm_gem_prime_mmap,
 
 	.ioctls = v3d_drm_ioctls,
 	.num_ioctls = ARRAY_SIZE(v3d_drm_ioctls),