Use the dma_fence_chain object to create a timeline of fence objects
instead of just replacing the existing fence.
Signed-off-by: Christian König <christian.koe...@amd.com>
---
drivers/gpu/drm/drm_syncobj.c | 40 ++++++++++++++++++++++++++++++++++++++++
include/drm/drm_syncobj.h | 5 +++++
2 files changed, 45 insertions(+)
diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
index 4a2e6ef16979..589d884ccd58 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -193,6 +193,46 @@ void drm_syncobj_remove_callback(struct drm_syncobj
*syncobj,
spin_unlock(&syncobj->lock);
}
+/**
+ * drm_syncobj_add_point - add new timeline point to the syncobj
+ * @syncobj: sync object to add timeline point do
+ * @chain: chain node to use to add the point
+ * @fence: fence to encapsulate in the chain node
+ * @point: sequence number to use for the point
+ *
+ * Add the chain node as new timeline point to the syncobj.
+ */
+void drm_syncobj_add_point(struct drm_syncobj *syncobj,
+ struct dma_fence_chain *chain,
+ struct dma_fence *fence,
+ uint64_t point)
+{
+ struct drm_syncobj_cb *cur, *tmp;
+ struct dma_fence *prev;
+
+ dma_fence_get(fence);
+ dma_fence_get(fence);
+
+ spin_lock(&syncobj->lock);
+
+ prev = rcu_dereference_protected(syncobj->fence,
+ lockdep_is_held(&syncobj->lock));
+ dma_fence_chain_init(chain, prev, fence, point);
+ rcu_assign_pointer(syncobj->fence, &chain->base);
+
+ list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node) {
+ list_del_init(&cur->node);
+ cur->func(syncobj, cur);
+ }
+ spin_unlock(&syncobj->lock);
+
+ /* Walk the chain once to trigger garbage collection */
+ prev = fence;
+ dma_fence_chain_for_each(prev);
+
+ dma_fence_put(fence);
+}
+
/**
* drm_syncobj_replace_fence - replace fence in a sync object.
* @syncobj: Sync object to replace fence in
diff --git a/include/drm/drm_syncobj.h b/include/drm/drm_syncobj.h
index c79f5ada7cdb..35a917241e30 100644
--- a/include/drm/drm_syncobj.h
+++ b/include/drm/drm_syncobj.h
@@ -27,6 +27,7 @@
#define __DRM_SYNCOBJ_H__
#include "linux/dma-fence.h"
+#include "linux/dma-fence-chain.h"
/**
* struct drm_syncobj - sync object.
@@ -110,6 +111,10 @@ drm_syncobj_fence_get(struct drm_syncobj *syncobj)
struct drm_syncobj *drm_syncobj_find(struct drm_file *file_private,
u32 handle);
+void drm_syncobj_add_point(struct drm_syncobj *syncobj,
+ struct dma_fence_chain *chain,
+ struct dma_fence *fence,
+ uint64_t point);
void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,
struct dma_fence *fence);
int drm_syncobj_find_fence(struct drm_file *file_private,
--
2.14.1
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
