drm: Add |struct drm_gem_vram_object| callbacks for |struct drm_driver|

[linux.git] / drivers / gpu / drm / drm_gem_vram_helper.c

diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
index d6c4e0d0a1c5c5bf5271409ac1a9fb4eb2ec11ad..2640283743360963b365e83149f2bbd682fe7267 100644 (file)
--- a/drivers/gpu/drm/drm_gem_vram_helper.c
+++ b/drivers/gpu/drm/drm_gem_vram_helper.c
@@ -460,3 +460,52 @@ int drm_gem_vram_bo_driver_verify_access(struct ttm_buffer_object *bo,
                                          filp->private_data);
 }
 EXPORT_SYMBOL(drm_gem_vram_bo_driver_verify_access);
+
+/*
+ * Helpers for struct drm_driver
+ */
+
+/**
+ * drm_gem_vram_driver_gem_free_object_unlocked() - \
+       Implements &struct drm_driver.gem_free_object_unlocked
+ * @gem:       GEM object. Refers to &struct drm_gem_vram_object.gem
+ */
+void drm_gem_vram_driver_gem_free_object_unlocked(struct drm_gem_object *gem)
+{
+       struct drm_gem_vram_object *gbo = drm_gem_vram_of_gem(gem);
+
+       drm_gem_vram_put(gbo);
+}
+EXPORT_SYMBOL(drm_gem_vram_driver_gem_free_object_unlocked);
+
+/**
+ * drm_gem_vram_driver_dumb_mmap_offset() - \
+       Implements &struct drm_driver.dumb_mmap_offset
+ * @file:      DRM file pointer.
+ * @dev:       DRM device.
+ * @handle:    GEM handle
+ * @offset:    Returns the mapping's memory offset on success
+ *
+ * Returns:
+ * 0 on success, or
+ * a negative errno code otherwise.
+ */
+int drm_gem_vram_driver_dumb_mmap_offset(struct drm_file *file,
+                                        struct drm_device *dev,
+                                        uint32_t handle, uint64_t *offset)
+{
+       struct drm_gem_object *gem;
+       struct drm_gem_vram_object *gbo;
+
+       gem = drm_gem_object_lookup(file, handle);
+       if (!gem)
+               return -ENOENT;
+
+       gbo = drm_gem_vram_of_gem(gem);
+       *offset = drm_gem_vram_mmap_offset(gbo);
+
+       drm_gem_object_put_unlocked(gem);
+
+       return 0;
+}
+EXPORT_SYMBOL(drm_gem_vram_driver_dumb_mmap_offset);