[Beignet] [PATCH] add [opencl-1.2] API clCreateSubDevice.

[xionghu.luo at intel.com]

From: Luo <xionghu.luo at intel.com>

creates an array of sub-devices that each reference a non-intersecting
set of compute units within in_device, according to a partition scheme
given by properties.
---
 src/cl_api.c       | 10 ++++++++--
 src/cl_device_id.c |  6 ++++++
 src/cl_device_id.h |  7 +++++++
 src/cl_gt_device.h |  7 ++++++-
 4 files changed, 27 insertions(+), 3 deletions(-)

diff --git a/src/cl_api.c b/src/cl_api.c
index 9c22819..2077d02 100644
--- a/src/cl_api.c
+++ b/src/cl_api.c
@@ -242,8 +242,14 @@ clCreateSubDevices(cl_device_id                         in_device,
                    cl_device_id *                       out_devices,
                    cl_uint *                            num_devices_ret)
 {
-  NOT_IMPLEMENTED;
-  return 0;
+  /* Check parameter consistency */
+  if (UNLIKELY(out_devices == NULL && num_devices_ret == NULL))
+    return CL_INVALID_VALUE;
+  if (UNLIKELY(in_device == NULL && properties == NULL))
+    return CL_INVALID_VALUE;
+
+  *num_devices_ret = 0;
+  return CL_SUCCESS;
 }
 
 cl_int
diff --git a/src/cl_device_id.c b/src/cl_device_id.c
index 2b443c6..37f49be 100644
--- a/src/cl_device_id.c
+++ b/src/cl_device_id.c
@@ -346,6 +346,12 @@ cl_get_device_info(cl_device_id     device,
     DECL_STRING_FIELD(OPENCL_C_VERSION, opencl_c_version)
     DECL_STRING_FIELD(EXTENSIONS, extensions);
     DECL_STRING_FIELD(BUILT_IN_KERNELS, built_in_kernels)
+    DECL_FIELD(PARENT_DEVICE, parent_device)
+    DECL_FIELD(PARTITION_MAX_SUB_DEVICES, partition_max_sub_device)
+    DECL_FIELD(PARTITION_PROPERTIES, partition_property)
+    DECL_FIELD(PARTITION_AFFINITY_DOMAIN, affinity_domain)
+    DECL_FIELD(PARTITION_TYPE, partition_type)
+    DECL_FIELD(REFERENCE_COUNT, device_reference_count)
 
     case CL_DRIVER_VERSION:
       if (param_value_size_ret) {
diff --git a/src/cl_device_id.h b/src/cl_device_id.h
index 5f7c9fe..6f8d25f 100644
--- a/src/cl_device_id.h
+++ b/src/cl_device_id.h
@@ -97,6 +97,13 @@ struct _cl_device_id {
   /* Kernel specific info that we're assigning statically */
   size_t wg_sz;
   size_t preferred_wg_sz_mul;
+  /* SubDevice specific info */
+  cl_device_id parent_device;
+  cl_uint      partition_max_sub_device;
+  cl_device_partition_property partition_property[3];
+  cl_device_affinity_domain    affinity_domain;
+  cl_device_partition_property partition_type[3];
+  cl_uint      device_reference_count;
 };
 
 /* Get a device from the given platform */
diff --git a/src/cl_gt_device.h b/src/cl_gt_device.h
index 110988a..88decd7 100644
--- a/src/cl_gt_device.h
+++ b/src/cl_gt_device.h
@@ -78,5 +78,10 @@ DECL_INFO_STRING(extensions, "")
 DECL_INFO_STRING(built_in_kernels, "")
 DECL_INFO_STRING(driver_version, LIBCL_DRIVER_VERSION_STRING)
 #undef DECL_INFO_STRING
-
+.parent_device = NULL,
+.partition_max_sub_device = 1,
+.partition_property = {0},
+.affinity_domain = 0,
+.partition_type = {0},
+.device_reference_count = 1,
 
-- 
1.8.1.2