drm/ttm: Provide ttm_bo_global_{init/release}() for struct ttm_bo_global

So far, struct ttm_bo_global_ref was the only way of initializing a struct
ttm_bo_global. Providing separate initializer and release functions for
struct ttm_bo_global gives drivers the option of implementing their own
init and release callbacks for drm_global_references of type
DRM_GLOBAL_TTM_BO.

The original functions for initializing and releasing via struct
ttm_bo_global_ref are wrappers around the new interfaces.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 9c2bb88..9edece6 100644 (file)
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -1522,26 +1522,22 @@ static void ttm_bo_global_kobj_release(struct kobject *kobj)
        kfree(glob);
 }
 
-void ttm_bo_global_ref_release(struct drm_global_reference *ref)
+void ttm_bo_global_release(struct ttm_bo_global *glob)
 {
-       struct ttm_bo_global *glob = ref->object;
-
        kobject_del(&glob->kobj);
        kobject_put(&glob->kobj);
 }
-EXPORT_SYMBOL(ttm_bo_global_ref_release);
+EXPORT_SYMBOL(ttm_bo_global_release);
 
-int ttm_bo_global_ref_init(struct drm_global_reference *ref)
+int ttm_bo_global_init(struct ttm_bo_global *glob,
+                      struct ttm_mem_global *mem_glob)
 {
-       struct ttm_bo_global_ref *bo_ref =
-               container_of(ref, struct ttm_bo_global_ref, ref);
-       struct ttm_bo_global *glob = ref->object;
        int ret;
        unsigned i;
 
        mutex_init(&glob->device_list_mutex);
        spin_lock_init(&glob->lru_lock);
-       glob->mem_glob = bo_ref->mem_glob;
+       glob->mem_glob = mem_glob;
        glob->mem_glob->bo_glob = glob;
        glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);
 
@@ -1564,7 +1560,7 @@ out_no_drp:
        kfree(glob);
        return ret;
 }
-EXPORT_SYMBOL(ttm_bo_global_ref_init);
+EXPORT_SYMBOL(ttm_bo_global_init);
 
 
 int ttm_bo_device_release(struct ttm_bo_device *bdev)

diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index c3c0751..c6ee07d 100644 (file)
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -385,15 +385,6 @@ struct ttm_bo_driver {
 };
 
 /**
- * struct ttm_bo_global_ref - Argument to initialize a struct ttm_bo_global.
- */
-
-struct ttm_bo_global_ref {
-       struct drm_global_reference ref;
-       struct ttm_mem_global *mem_glob;
-};
-
-/**
  * struct ttm_bo_global - Buffer object driver global data.
  *
  * @mem_glob: Pointer to a struct ttm_mem_global object for accounting.
@@ -578,8 +569,9 @@ void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem);
 void ttm_bo_mem_put_locked(struct ttm_buffer_object *bo,
                           struct ttm_mem_reg *mem);
 
-void ttm_bo_global_ref_release(struct drm_global_reference *ref);
-int ttm_bo_global_ref_init(struct drm_global_reference *ref);
+void ttm_bo_global_release(struct ttm_bo_global *glob);
+int ttm_bo_global_init(struct ttm_bo_global *glob,
+                      struct ttm_mem_global *mem_glob);
 
 int ttm_bo_device_release(struct ttm_bo_device *bdev);
 
@@ -897,4 +889,43 @@ pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp);
 
 extern const struct ttm_mem_type_manager_func ttm_bo_manager_func;
 
+/**
+ * struct ttm_bo_global_ref - Argument to initialize a struct ttm_bo_global.
+ */
+
+struct ttm_bo_global_ref {
+       struct drm_global_reference ref;
+       struct ttm_mem_global *mem_glob;
+};
+
+/**
+ * ttm_bo_global_ref_init
+ *
+ * @ref: DRM global reference
+ *
+ * Helper function that initializes a struct ttm_bo_global. This function
+ * is used as init call-back function for DRM global references of type
+ * DRM_GLOBAL_TTM_BO_REF.
+ */
+static inline int ttm_bo_global_ref_init(struct drm_global_reference *ref)
+{
+       struct ttm_bo_global_ref *bo_ref =
+               container_of(ref, struct ttm_bo_global_ref, ref);
+       return ttm_bo_global_init(ref->object, bo_ref->mem_glob);
+}
+
+/**
+ * ttm_bo_global_ref_release
+ *
+ * @ref: DRM global reference
+ *
+ * Helper function that releases a struct ttm_bo_global. This function
+ * is used as release call-back function for DRM global references of type
+ * DRM_GLOBAL_TTM_BO_REF.
+ */
+static inline void ttm_bo_global_ref_release(struct drm_global_reference *ref)
+{
+       ttm_bo_global_release(ref->object);
+}
+
 #endif