gpu: nvgpu: Allow nvgpu sync_pts to be introspected

Allow nvgpu to identify sync_pts that were made by nvgpu so that
the underlying data structures can be accessed. This is important
for the semaphore fast-path that allows nvgpu to skip doing a
long CPU wait on a sync_fence.

Bug 1732449
JIRA DNVGPU-12

Change-Id: Iea43de21d2d7a4e75db6b6dbf24efb78ce64d619
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1162688
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/sync_gk20a.h b/drivers/gpu/nvgpu/gk20a/sync_gk20a.h
index e9c26221..f885febd 100644
--- a/drivers/gpu/nvgpu/gk20a/sync_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/sync_gk20a.h
@@ -19,11 +19,23 @@
 #define _GK20A_SYNC_H_
 
 #include <linux/types.h>
+#include <linux/version.h>
 
 struct sync_timeline;
 struct sync_fence;
 struct sync_pt;
 struct gk20a_semaphore;
+struct fence;
+
+int __gk20a_is_gk20a_sync_pt_inst(struct sync_pt *pt);
+int gk20a_is_gk20a_sync_pt_inst(struct fence *f);
+int gk20a_is_sema_backed_sync_fence(struct sync_fence *fence);
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,18,0)
+struct gk20a_semaphore *gk20a_sync_pt_inst_get_sema(struct fence *f);
+#else
+struct gk20a_semaphore *gk20a_sync_pt_inst_get_sema(struct sync_pt *pt);
+#endif
 
 #ifdef CONFIG_SYNC
 struct sync_timeline *gk20a_sync_timeline_create(const char *fmt, ...);