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authorThomas Hellstrom <thellstrom@vmware.com>2010-11-17 12:28:30 +0000
committerDave Airlie <airlied@redhat.com>2010-11-22 13:25:20 +1000
commit95762c2b34069bf4adb7929969f1f5f5fc8a38df (patch)
tree5c792e65dbdb4e7cb2c04b5a8058a929e8acc23d /include/drm/ttm
parent702adba22433c175e8429a47760f35ca16caf1cd (diff)
downloadop-kernel-dev-95762c2b34069bf4adb7929969f1f5f5fc8a38df.zip
op-kernel-dev-95762c2b34069bf4adb7929969f1f5f5fc8a38df.tar.gz
drm/ttm: Improved fencing of buffer object lists
Drastically reduce the number of spin lock / unlock operations by performing unreserving and fencing under global locks. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jerome Glisse <j.glisse@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'include/drm/ttm')
-rw-r--r--include/drm/ttm/ttm_bo_driver.h10
-rw-r--r--include/drm/ttm/ttm_execbuf_util.h2
2 files changed, 12 insertions, 0 deletions
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index ca8131e..cfb9ca4 100644
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -910,6 +910,16 @@ extern int ttm_bo_reserve_locked(struct ttm_buffer_object *bo,
extern void ttm_bo_unreserve(struct ttm_buffer_object *bo);
/**
+ * ttm_bo_unreserve_locked
+ *
+ * @bo: A pointer to a struct ttm_buffer_object.
+ *
+ * Unreserve a previous reservation of @bo.
+ * Needs to be called with struct ttm_bo_global::lru_lock held.
+ */
+extern void ttm_bo_unreserve_locked(struct ttm_buffer_object *bo);
+
+/**
* ttm_bo_wait_unreserved
*
* @bo: A pointer to a struct ttm_buffer_object.
diff --git a/include/drm/ttm/ttm_execbuf_util.h b/include/drm/ttm/ttm_execbuf_util.h
index fd09b84..535ab00 100644
--- a/include/drm/ttm/ttm_execbuf_util.h
+++ b/include/drm/ttm/ttm_execbuf_util.h
@@ -44,6 +44,7 @@
* @reserved: Indicates whether @bo has been reserved for validation.
* @removed: Indicates whether @bo has been removed from lru lists.
* @put_count: Number of outstanding references on bo::list_kref.
+ * @old_sync_obj: Pointer to a sync object about to be unreferenced
*/
struct ttm_validate_buffer {
@@ -53,6 +54,7 @@ struct ttm_validate_buffer {
bool reserved;
bool removed;
int put_count;
+ void *old_sync_obj;
};
/**
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