[Beignet] [PATCH] driver/runtime: get global mem size dynamically

[Pan Xiuli]

The gen8 and higher gpu can have more than 2G mem, so we dynamically
get the global mem size.

Signed-off-by: Pan Xiuli <xiuli.pan at intel.com>
---
 src/cl_device_id.c       | 6 +++---
 src/intel/intel_driver.c | 6 ++++++
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/cl_device_id.c b/src/cl_device_id.c
index 78d2cf4..c3bd35f 100644
--- a/src/cl_device_id.c
+++ b/src/cl_device_id.c
@@ -550,10 +550,10 @@ skl_gt4_break:
 
   struct sysinfo info;
   if (sysinfo(&info) == 0) {
-    uint64_t two_gb = 2 * 1024 * 1024 * 1024ul; 
+    uint64_t totalgpumem = ret->global_mem_size;
     uint64_t totalram = info.totalram * info.mem_unit;
-    ret->global_mem_size = (totalram > two_gb) ? 
-                            two_gb : info.totalram;
+    ret->global_mem_size = (totalram > totalgpumem) ?
+                            totalgpumem: totalram;
     ret->max_mem_alloc_size = ret->global_mem_size / 2;
   }
 
diff --git a/src/intel/intel_driver.c b/src/intel/intel_driver.c
index 035a103..1f286f7 100644
--- a/src/intel/intel_driver.c
+++ b/src/intel/intel_driver.c
@@ -829,6 +829,12 @@ intel_update_device_info(cl_device_id device)
   if (IS_CHERRYVIEW(device->device_id))
     printf(CHV_CONFIG_WARNING);
 #endif
+  //We should get the device memory dynamically, also the
+  //mapablce mem size usage is unknown. Still use global_mem_size/2
+  //as max_mem_alloc_size in cl_get_gt_device.
+  size_t total_mem,map_mem;
+  drm_intel_get_aperture_sizes(driver->fd,&map_mem,&total_mem);
+  device->global_mem_size = (cl_ulong)total_mem;
 
   intel_driver_context_destroy(driver);
   intel_driver_close(driver);
-- 
2.1.4