i965/sync: Implement DRI2_Fence extension

This enables EGL_KHR_fence_sync and EGL_KHR_wait_sync.

Below is the difference in piglit results, before and after this patch.
No regressions and several tests improve from 'skip' to 'pass'. Out of
EGL_KHR_fence_sync tests, two of the multithreaded tests skip; all other
tests pass.

  cmdline: piglit run -p gbm -t sync tests/quick.py
  mesa: master@1ac7db0
  piglit: 4069bec
  hw: Ivybridge

        | before after
  ------+-------------
   pass |     32    46
   fail |      0     0
  crash |      0     0
   skip |     35    21
  total |     67    67

v2:
  - Set fence->signalled = true in brw_fence_has_completed() too.

Reviewed-by: Daniel Stone <[email protected]>
Reviewed-by: Kenneth Graunke <[email protected]>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/intel_screen.h b/src/mesa/drivers/dri/i965/intel_screen.h
index f814ed017b1..e7a14903d6e 100644
--- a/src/mesa/drivers/dri/i965/intel_screen.h
+++ b/src/mesa/drivers/dri/i965/intel_screen.h
@@ -30,6 +30,9 @@
 
 #include <stdbool.h>
 #include <sys/time.h>
+
+#include <GL/internal/dri_interface.h>
+
 #include "dri_util.h"
 #include "intel_bufmgr.h"
 #include "brw_device_info.h"
@@ -76,6 +79,7 @@ extern void intelDestroyContext(__DRIcontext * driContextPriv);
 extern GLboolean intelUnbindContext(__DRIcontext * driContextPriv);
 
 PUBLIC const __DRIextension **__driDriverGetExtensions_i965(void);
+extern const __DRI2fenceExtension intelFenceExtension;
 
 extern GLboolean
 intelMakeCurrent(__DRIcontext * driContextPriv,