drm/ttm: simplify memory accounting for ttm user v2
Provide helper function to compute the kernel memory size needed
for each buffer object. Move all the accounting inside ttm, simplifying
driver and avoiding code duplication accross them.
v2 fix accounting of ghost object, one would have thought that i
would have run into the issue since a longtime but it seems
ghost object are rare when you have plenty of vram ;)
Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
index 8d95a42..974c8f8 100644
--- a/include/drm/ttm/ttm_bo_api.h
+++ b/include/drm/ttm/ttm_bo_api.h
@@ -429,9 +429,9 @@
* -EBUSY if the buffer is busy and no_wait is true.
* -ERESTARTSYS if interrupted by a signal.
*/
-
extern int
ttm_bo_synccpu_write_grab(struct ttm_buffer_object *bo, bool no_wait);
+
/**
* ttm_bo_synccpu_write_release:
*
@@ -442,6 +442,22 @@
extern void ttm_bo_synccpu_write_release(struct ttm_buffer_object *bo);
/**
+ * ttm_bo_acc_size
+ *
+ * @bdev: Pointer to a ttm_bo_device struct.
+ * @bo_size: size of the buffer object in byte.
+ * @struct_size: size of the structure holding buffer object datas
+ *
+ * Returns size to account for a buffer object
+ */
+size_t ttm_bo_acc_size(struct ttm_bo_device *bdev,
+ unsigned long bo_size,
+ unsigned struct_size);
+size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev,
+ unsigned long bo_size,
+ unsigned struct_size);
+
+/**
* ttm_bo_init
*
* @bdev: Pointer to a ttm_bo_device struct.
@@ -488,6 +504,7 @@
struct file *persistent_swap_storage,
size_t acc_size,
void (*destroy) (struct ttm_buffer_object *));
+
/**
* ttm_bo_synccpu_object_init
*
