summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/ttm/ttm_tt.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/ttm/ttm_tt.c')
-rw-r--r--drivers/gpu/drm/ttm/ttm_tt.c27
1 files changed, 23 insertions, 4 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
index 210d50365162..9af99084b344 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -170,9 +170,8 @@ void ttm_tt_destroy(struct ttm_tt *ttm)
ttm_tt_unbind(ttm);
}
- if (ttm->state == tt_unbound) {
- ttm->bdev->driver->ttm_tt_unpopulate(ttm);
- }
+ if (ttm->state == tt_unbound)
+ ttm_tt_unpopulate(ttm);
if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTENT_SWAP) &&
ttm->swap_storage)
@@ -362,7 +361,7 @@ int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistent_swap_storage)
page_cache_release(to_page);
}
- ttm->bdev->driver->ttm_tt_unpopulate(ttm);
+ ttm_tt_unpopulate(ttm);
ttm->swap_storage = swap_storage;
ttm->page_flags |= TTM_PAGE_FLAG_SWAPPED;
if (persistent_swap_storage)
@@ -375,3 +374,23 @@ out_err:
return ret;
}
+
+static void ttm_tt_clear_mapping(struct ttm_tt *ttm)
+{
+ pgoff_t i;
+ struct page **page = ttm->pages;
+
+ for (i = 0; i < ttm->num_pages; ++i) {
+ (*page)->mapping = NULL;
+ (*page++)->index = 0;
+ }
+}
+
+void ttm_tt_unpopulate(struct ttm_tt *ttm)
+{
+ if (ttm->state == tt_unpopulated)
+ return;
+
+ ttm_tt_clear_mapping(ttm);
+ ttm->bdev->driver->ttm_tt_unpopulate(ttm);
+}