[PATCH 03/03] beignet: set I915_CONTEXT_PARAM_NO_ZEROMAP when initializing context

[David Weinehall <david.weinehall@xxxxxxxxxxxxxxx>]

Set the I915_CONTEXT_PARAM_NO_ZEROMAP context parameter to disable
zero mappings if libdrm is new enough to expose such functionality.

Signed-off-by: David Weinehall <david.weinehall@xxxxxxxxx>
---
 CMakeLists.txt           |    6 ++++++
 src/CMakeLists.txt       |    5 +++++
 src/intel/intel_driver.c |    4 ++++
 3 files changed, 15 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5474447dbcf1..6c57a5346d65 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -146,6 +146,12 @@ IF(DRM_INTEL_FOUND)
     MESSAGE(STATUS "Disable EU total query support")
     MESSAGE(STATUS "Disable subslice total query support")
   ENDIF(DRM_INTEL_VERSION VERSION_GREATER 2.4.59)
+  IF(DRM_INTEL_VERSION VERSION_GREATER 2.4.61)
+    MESSAGE(STATUS "Enable no-zeromap support"
+    SET(DRM_INTEL_NOZEROMAP "enable")
+  ELSE(DRM_INTEL_VERSION VERSION_GREATER 2.4.61)
+    MESSAGE(STATUS "Disable no-zeromap support")
+  ENDIF(DRM_intEL_VERSION VERSION_GREATER 2.4.61)
 ELSE(DRM_INTEL_FOUND)
   MESSAGE(FATAL_ERROR "Looking for DRM Intel (>= 2.4.52) - not found")
 ENDIF(DRM_INTEL_FOUND)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index da695324829b..83c838ca20f6 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -119,6 +119,11 @@ SET(CMAKE_CXX_FLAGS "-DHAS_USERPTR ${CMAKE_CXX_FLAGS}")
 SET(CMAKE_C_FLAGS "-DHAS_USERPTR ${CMAKE_C_FLAGS}")
 endif (DRM_INTEL_USERPTR)
 
+if (DRM_INTEL_NOZEROMAP)
+SET(CMAKE_CXX_FLAGS "-DHAS_NOZEROMAP ${CMAKE_CXX_FLAGS}")
+SET(CMAKE_C_FLAGS "-DHAS_NOZEROMAP ${CMAKE_C_FLAGS}")
+endif (DRM_INTEL_NOZEROMAP)
+
 if (DRM_INTEL_EU_TOTAL)
 SET(CMAKE_CXX_FLAGS "-DHAS_EU_TOTAL ${CMAKE_CXX_FLAGS}")
 SET(CMAKE_C_FLAGS "-DHAS_EU_TOTAL ${CMAKE_C_FLAGS}")
diff --git a/src/intel/intel_driver.c b/src/intel/intel_driver.c
index 755ab6b9b4fd..a33c2605fcc8 100644
--- a/src/intel/intel_driver.c
+++ b/src/intel/intel_driver.c
@@ -140,6 +140,10 @@ intel_driver_context_init(intel_driver_t *driver)
 {
   driver->ctx = drm_intel_gem_context_create(driver->bufmgr);
   assert(driver->ctx);
+#ifdef HAS_ZEROMAP
+  drm_intel_gem_context_set_param(driver->ctx,
+				  I915_CONTEXT_PARAM_NO_ZEROMAP, 1);
+#endif /* HAS_ZEROMAP */
 }
 
 static void
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