From: Christian König <christian.koenig@xxxxxxx>
Useful for driver specific LRU handling.
v2: fix typo in comment
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
drivers/gpu/drm/ttm/ttm_bo.c | 12 +++++++-----
include/drm/ttm/ttm_bo_driver.h | 6 ++++++
2 files changed, 13 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index dbb0bb7..84ad992 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -186,8 +186,12 @@ EXPORT_SYMBOL(ttm_bo_add_to_lru);
int ttm_bo_del_from_lru(struct ttm_buffer_object *bo)
{
+ struct ttm_bo_device *bdev = bo->bdev;
int put_count = 0;
+ if (bdev->driver->lru_removal)
+ bdev->driver->lru_removal(bo);
+
if (!list_empty(&bo->swap)) {
list_del_init(&bo->swap);
++put_count;
@@ -197,11 +201,6 @@ int ttm_bo_del_from_lru(struct ttm_buffer_object *bo)
++put_count;
}
- /*
- * TODO: Add a driver hook to delete from
- * driver-specific LRU's here.
- */
-
return put_count;
}
@@ -235,6 +234,9 @@ void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo)
lockdep_assert_held(&bo->resv->lock.base);
+ if (bdev->driver->lru_removal)
+ bdev->driver->lru_removal(bo);
+
if (bo->mem.placement & TTM_PL_FLAG_NO_EVICT) {
list_del_init(&bo->swap);
list_del_init(&bo->lru);
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index 391ef04..23a30b3 100644
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -434,6 +434,12 @@ struct ttm_bo_driver {
*/
int (*io_mem_reserve)(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem);
void (*io_mem_free)(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem);
+
+ /**
+ * Optional driver callback for when BO is removed from the LRU.
+ * Called with LRU lock held immediately before the removal.
+ */
+ void (*lru_removal)(struct ttm_buffer_object *bo);
};
/**
--
2.5.0
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