[Intel-gfx] [PATCH] Runtime: set the sub slice according to kernel pooled EU configure.

[Yang Rong]

If BXT pooled EU enable, the 3*6 EUs is split into 2 pooled, so change
the sub slice to 2.
For min no. of eu in pool, only affact fused down 2*6 BXT devices,
because beignet don't support these devices now, add assert only.
assert.

This patch is based on kernel patch: https://patchwork.freedesktop.org/series/8200/
Thanks Arun.

Signed-off-by: Yang Rong <rong.r.yang at intel.com>
---
 CMakeLists.txt           | 12 ++++++++++++
 src/CMakeLists.txt       | 10 ++++++++++
 src/intel/intel_driver.c | 15 +++++++++++++++
 3 files changed, 37 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index fae3e88..af684ed 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -153,6 +153,18 @@ IF(DRM_INTEL_FOUND)
   ELSE(HAVE_DRM_INTEL_SUBSLICE_TOTAL)
     MESSAGE(STATUS "Disable subslice total query support")
   ENDIF(HAVE_DRM_INTEL_SUBSLICE_TOTAL)
+  CHECK_LIBRARY_EXISTS(drm_intel "drm_intel_get_pooled_eu" "" HAVE_DRM_INTEL_POOLED_EU)
+  IF(HAVE_DRM_INTEL_POOLED_EU)
+    MESSAGE(STATUS "Enable pooled eu query support")
+  ELSE(HAVE_DRM_INTEL_POOLED_EU)
+    MESSAGE(STATUS "Disable pooled eu query support")
+  ENDIF(HAVE_DRM_INTEL_POOLED_EU)
+  CHECK_LIBRARY_EXISTS(drm_intel "drm_intel_get_min_eu_in_pool" "" HAVE_DRM_INTEL_MIN_EU_IN_POOL)
+  IF(HAVE_DRM_INTEL_MIN_EU_IN_POOL)
+    MESSAGE(STATUS "Enable min eu in pool query support")
+  ELSE(HAVE_DRM_INTEL_MIN_EU_IN_POOL)
+    MESSAGE(STATUS "Disable min eu in pool query support")
+  ENDIF(HAVE_DRM_INTEL_MIN_EU_IN_POOL)
 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 98f8423..a002865 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -138,6 +138,16 @@ if (HAVE_DRM_INTEL_SUBSLICE_TOTAL)
   SET(CMAKE_C_FLAGS "-DHAS_SUBSLICE_TOTAL ${CMAKE_C_FLAGS}")
 endif (HAVE_DRM_INTEL_SUBSLICE_TOTAL)
 
+if (HAVE_DRM_INTEL_POOLED_EU)
+  SET(CMAKE_CXX_FLAGS "-DHAS_POOLED_EU ${CMAKE_CXX_FLAGS}")
+  SET(CMAKE_C_FLAGS "-DHAS_POOLED_EU ${CMAKE_C_FLAGS}")
+endif (HAVE_DRM_INTEL_POOLED_EU)
+
+if (HAVE_DRM_INTEL_MIN_EU_IN_POOL)
+  SET(CMAKE_CXX_FLAGS "-DHAS_MIN_EU_IN_POOL ${CMAKE_CXX_FLAGS}")
+  SET(CMAKE_C_FLAGS "-DHAS_MIN_EU_IN_POOL ${CMAKE_C_FLAGS}")
+endif (HAVE_DRM_INTEL_MIN_EU_IN_POOL)
+
 set(GIT_SHA1 "git_sha1.h")
 add_custom_target(${GIT_SHA1} ALL
   COMMAND chmod +x ${CMAKE_CURRENT_SOURCE_DIR}/git_sha1.sh
diff --git a/src/intel/intel_driver.c b/src/intel/intel_driver.c
index 03d9d34..8f2373b 100644
--- a/src/intel/intel_driver.c
+++ b/src/intel/intel_driver.c
@@ -882,6 +882,21 @@ intel_update_device_info(cl_device_id device)
 #endif
   }
 #endif
+
+#ifdef HAS_POOLED_EU
+  /* BXT pooled eu, 3*6 to 2*9, like sub slice count is 2 */
+  unsigned int has_pooled_eu = 0;
+  if(!drm_intel_get_pooled_eu(driver->fd, &has_pooled_eu) && has_pooled_eu)
+    device->sub_slice_count = 2;
+
+#ifdef HAS_MIN_EU_IN_POOL
+  unsigned int min_eu;
+  /* for fused down 2x6 devices, beignet don't support. */
+  if (has_pooled_eu && !drm_intel_get_min_eu_in_pool(driver->fd, &min_eu)) {
+    assert(min_eu == 9); //don't support fuse down device.
+  }
+#endif //HAS_MIN_EU_IN_POOL
+#endif //HAS_POOLED_EU
   //We should get the device memory dynamically, but the
   //mapablce mem size usage is unknown. Just ignore it.
   size_t total_mem,map_mem;
-- 
2.1.4