Add query to retrieve adapter handle from platform.

include/ur_api.h

@@ -1087,6 +1087,8 @@ typedef enum ur_platform_info_t {
                                       ///< info needs to be dynamically queried.
     UR_PLATFORM_INFO_BACKEND = 6,     ///< [::ur_platform_backend_t] The backend of the platform. Identifies the
                                       ///< native backend adapter implementing this platform.
+    UR_PLATFORM_INFO_ADAPTER = 7,     ///< [::ur_adapter_handle_t] The adapter handle associated with the
+                                      ///< platform.
     /// @cond
     UR_PLATFORM_INFO_FORCE_UINT32 = 0x7fffffff
     /// @endcond
@@ -1112,7 +1114,7 @@ typedef enum ur_platform_info_t {
 ///     - ::UR_RESULT_ERROR_INVALID_NULL_HANDLE
 ///         + `NULL == hPlatform`
 ///     - ::UR_RESULT_ERROR_INVALID_ENUMERATION
-///         + `::UR_PLATFORM_INFO_BACKEND < propName`
+///         + `::UR_PLATFORM_INFO_ADAPTER < propName`
 ///     - ::UR_RESULT_ERROR_UNSUPPORTED_ENUMERATION
 ///         + If `propName` is not supported by the adapter.
 ///     - ::UR_RESULT_ERROR_INVALID_SIZE

include/ur_print.hpp

@@ -2024,6 +2024,9 @@ inline std::ostream &operator<<(std::ostream &os, enum ur_platform_info_t value)
     case UR_PLATFORM_INFO_BACKEND:
         os << "UR_PLATFORM_INFO_BACKEND";
         break;
+    case UR_PLATFORM_INFO_ADAPTER:
+        os << "UR_PLATFORM_INFO_ADAPTER";
+        break;
     default:
         os << "unknown enumerator";
         break;
@@ -2077,6 +2080,19 @@ inline ur_result_t printTagged(std::ostream &os, const void *ptr, ur_platform_in
 
         os << ")";
     } break;
+    case UR_PLATFORM_INFO_ADAPTER: {
+        const ur_adapter_handle_t *tptr = (const ur_adapter_handle_t *)ptr;
+        if (sizeof(ur_adapter_handle_t) > size) {
+            os << "invalid size (is: " << size << ", expected: >=" << sizeof(ur_adapter_handle_t) << ")";
+            return UR_RESULT_ERROR_INVALID_SIZE;
+        }
+        os << (const void *)(tptr) << " (";
+
+        ur::details::printPtr(os,
+                              *tptr);
+
+        os << ")";
+    } break;
     default:
         os << "unknown enumerator";
         return UR_RESULT_ERROR_INVALID_ENUMERATION;

scripts/core/platform.yml

@@ -77,7 +77,9 @@ etors:
     - name: BACKEND
       value: "6"
       desc: "[$x_platform_backend_t] The backend of the platform. Identifies the native backend adapter implementing this platform."
-
+    - name: ADAPTER
+      value: "7"
+      desc: "[$x_adapter_handle_t] The adapter handle associated with the platform."
 --- #--------------------------------------------------------------------------
 type: function
 desc: "Retrieves various information about platform"

source/adapters/cuda/platform.cpp

@@ -9,6 +9,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "platform.hpp"
+#include "adapter.hpp"
 #include "common.hpp"
 #include "context.hpp"
 #include "device.hpp"
@@ -41,6 +42,9 @@ UR_APIEXPORT ur_result_t UR_APICALL urPlatformGetInfo(
   case UR_PLATFORM_INFO_BACKEND: {
     return ReturnValue(UR_PLATFORM_BACKEND_CUDA);
   }
+  case UR_PLATFORM_INFO_ADAPTER: {
+    return ReturnValue(&adapter);
+  }
   default:
     return UR_RESULT_ERROR_INVALID_ENUMERATION;
   }

source/adapters/hip/platform.cpp

@@ -9,6 +9,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "platform.hpp"
+#include "adapter.hpp"
 #include "context.hpp"
 
 UR_APIEXPORT ur_result_t UR_APICALL
@@ -34,6 +35,9 @@ urPlatformGetInfo(ur_platform_handle_t, ur_platform_info_t propName,
   case UR_PLATFORM_INFO_EXTENSIONS: {
     return ReturnValue("");
   }
+  case UR_PLATFORM_INFO_ADAPTER: {
+    return ReturnValue(&adapter);
+  }
   default:
     return UR_RESULT_ERROR_INVALID_ENUMERATION;
   }

source/adapters/level_zero/platform.cpp

@@ -95,6 +95,8 @@ ur_result_t urPlatformGetInfo(
     return ReturnValue(Platform->ZeDriverApiVersion.c_str());
   case UR_PLATFORM_INFO_BACKEND:
     return ReturnValue(UR_PLATFORM_BACKEND_LEVEL_ZERO);
+  case UR_PLATFORM_INFO_ADAPTER:
+    return ReturnValue(GlobalAdapter);
   default:
     logger::debug("urPlatformGetInfo: unrecognized ParamName");
     return UR_RESULT_ERROR_INVALID_VALUE;

source/adapters/native_cpu/CMakeLists.txt

@@ -9,6 +9,7 @@ set(TARGET_NAME ur_adapter_native_cpu)
 
 add_ur_adapter(${TARGET_NAME}
         SHARED
+        ${CMAKE_CURRENT_SOURCE_DIR}/adapter.hpp
         ${CMAKE_CURRENT_SOURCE_DIR}/adapter.cpp
         ${CMAKE_CURRENT_SOURCE_DIR}/command_buffer.cpp
         ${CMAKE_CURRENT_SOURCE_DIR}/common.cpp

source/adapters/native_cpu/adapter.cpp

@@ -8,6 +8,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "adapter.hpp"
 #include "common.hpp"
 #include "ur_api.h"
 

source/adapters/native_cpu/adapter.hpp

@@ -0,0 +1,13 @@
+//===---------------- adapter.hpp - Native CPU Adapter --------------------===//
+//
+// Copyright (C) 2024 Intel Corporation
+//
+// Part of the Unified-Runtime Project, under the Apache License v2.0 with LLVM
+// Exceptions. See LICENSE.TXT
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+struct ur_adapter_handle_t_;
+
+extern ur_adapter_handle_t_ Adapter;

source/adapters/native_cpu/platform.cpp

@@ -9,6 +9,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "platform.hpp"
+#include "adapter.hpp"
 #include "common.hpp"
 
 #include "ur/ur.hpp"
@@ -75,9 +76,9 @@ urPlatformGetInfo(ur_platform_handle_t hPlatform, ur_platform_info_t propName,
     return ReturnValue("");
 
   case UR_PLATFORM_INFO_BACKEND:
-    // TODO(alcpz): PR with this enum value at
-    // https://github.com/oneapi-src/unified-runtime
     return ReturnValue(UR_PLATFORM_BACKEND_NATIVE_CPU);
+  case UR_PLATFORM_INFO_ADAPTER:
+    return ReturnValue(&Adapter);
   default:
     DIE_NO_IMPLEMENTATION;
   }

source/adapters/opencl/platform.cpp

@@ -9,6 +9,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "platform.hpp"
+#include "adapter.hpp"
 
 ur_result_t cl_adapter::getPlatformVersion(cl_platform_id Plat,
                                            oclv::OpenCLVersion &Version) {
@@ -57,6 +58,8 @@ urPlatformGetInfo(ur_platform_handle_t hPlatform, ur_platform_info_t propName,
   switch (static_cast<uint32_t>(propName)) {
   case UR_PLATFORM_INFO_BACKEND:
     return ReturnValue(UR_PLATFORM_BACKEND_OPENCL);
+  case UR_PLATFORM_INFO_ADAPTER:
+    return ReturnValue(ur::cl::getAdapter());
   case UR_PLATFORM_INFO_NAME:
   case UR_PLATFORM_INFO_VENDOR_NAME:
   case UR_PLATFORM_INFO_VERSION:

source/loader/layers/validation/ur_valddi.cpp

@@ -280,7 +280,7 @@ __urdlllocal ur_result_t UR_APICALL urPlatformGetInfo(
             return UR_RESULT_ERROR_INVALID_NULL_POINTER;
         }
 
-        if (UR_PLATFORM_INFO_BACKEND < propName) {
+        if (UR_PLATFORM_INFO_ADAPTER < propName) {
             return UR_RESULT_ERROR_INVALID_ENUMERATION;
         }
 

source/loader/ur_ldrddi.cpp

@@ -289,10 +289,43 @@ __urdlllocal ur_result_t UR_APICALL urPlatformGetInfo(
     // convert loader handle to platform handle
     hPlatform = reinterpret_cast<ur_platform_object_t *>(hPlatform)->handle;
 
+    // this value is needed for converting adapter handles to loader handles
+    size_t sizeret = 0;
+    if (pPropSizeRet == NULL) {
+        pPropSizeRet = &sizeret;
+    }
+
     // forward to device-platform
     result =
         pfnGetInfo(hPlatform, propName, propSize, pPropValue, pPropSizeRet);
 
+    if (UR_RESULT_SUCCESS != result) {
+        return result;
+    }
+
+    try {
+        if (pPropValue != nullptr) {
+            switch (propName) {
+            case UR_PLATFORM_INFO_ADAPTER: {
+                ur_adapter_handle_t *handles =
+                    reinterpret_cast<ur_adapter_handle_t *>(pPropValue);
+                size_t nelements = *pPropSizeRet / sizeof(ur_adapter_handle_t);
+                for (size_t i = 0; i < nelements; ++i) {
+                    if (handles[i] != nullptr) {
+                        handles[i] = reinterpret_cast<ur_adapter_handle_t>(
+                            context->factories.ur_adapter_factory.getInstance(
+                                handles[i], dditable));
+                    }
+                }
+            } break;
+            default: {
+            } break;
+            }
+        }
+    } catch (std::bad_alloc &) {
+        result = UR_RESULT_ERROR_OUT_OF_HOST_MEMORY;
+    }
+
     return result;
 }
 

source/loader/ur_libapi.cpp

@@ -557,7 +557,7 @@ ur_result_t UR_APICALL urPlatformGet(
 ///     - ::UR_RESULT_ERROR_INVALID_NULL_HANDLE
 ///         + `NULL == hPlatform`
 ///     - ::UR_RESULT_ERROR_INVALID_ENUMERATION
-///         + `::UR_PLATFORM_INFO_BACKEND < propName`
+///         + `::UR_PLATFORM_INFO_ADAPTER < propName`
 ///     - ::UR_RESULT_ERROR_UNSUPPORTED_ENUMERATION
 ///         + If `propName` is not supported by the adapter.
 ///     - ::UR_RESULT_ERROR_INVALID_SIZE

source/ur_api.cpp

@@ -501,7 +501,7 @@ ur_result_t UR_APICALL urPlatformGet(
 ///     - ::UR_RESULT_ERROR_INVALID_NULL_HANDLE
 ///         + `NULL == hPlatform`
 ///     - ::UR_RESULT_ERROR_INVALID_ENUMERATION
-///         + `::UR_PLATFORM_INFO_BACKEND < propName`
+///         + `::UR_PLATFORM_INFO_ADAPTER < propName`
 ///     - ::UR_RESULT_ERROR_UNSUPPORTED_ENUMERATION
 ///         + If `propName` is not supported by the adapter.
 ///     - ::UR_RESULT_ERROR_INVALID_SIZE

test/conformance/platform/urPlatformGetInfo.cpp

@@ -19,7 +19,8 @@ INSTANTIATE_TEST_SUITE_P(
     urPlatformGetInfo, urPlatformGetInfoTest,
     ::testing::Values(UR_PLATFORM_INFO_NAME, UR_PLATFORM_INFO_VENDOR_NAME,
                       UR_PLATFORM_INFO_VERSION, UR_PLATFORM_INFO_EXTENSIONS,
-                      UR_PLATFORM_INFO_PROFILE, UR_PLATFORM_INFO_BACKEND),
+                      UR_PLATFORM_INFO_PROFILE, UR_PLATFORM_INFO_BACKEND,
+                      UR_PLATFORM_INFO_ADAPTER),
     [](const ::testing::TestParamInfo<ur_platform_info_t> &info) {
         std::stringstream ss;
         ss << info.param;
@@ -38,8 +39,29 @@ TEST_P(urPlatformGetInfoTest, Success) {
     std::vector<char> name(size);
     ASSERT_SUCCESS(
         urPlatformGetInfo(platform, info_type, size, name.data(), nullptr));
-    if (info_type != UR_PLATFORM_INFO_BACKEND) {
+    switch (info_type) {
+    case UR_PLATFORM_INFO_NAME:
+    case UR_PLATFORM_INFO_VENDOR_NAME:
+    case UR_PLATFORM_INFO_VERSION:
+    case UR_PLATFORM_INFO_EXTENSIONS:
+    case UR_PLATFORM_INFO_PROFILE: {
         ASSERT_EQ(size, std::strlen(name.data()) + 1);
+        break;
+    }
+    case UR_PLATFORM_INFO_BACKEND: {
+        ASSERT_EQ(size, sizeof(ur_platform_backend_t));
+        break;
+    }
+    case UR_PLATFORM_INFO_ADAPTER: {
+        auto queried_adapter =
+            *reinterpret_cast<ur_adapter_handle_t *>(name.data());
+        auto adapter_found =
+            std::find(adapters.begin(), adapters.end(), queried_adapter);
+        ASSERT_NE(adapter_found, adapters.end());
+        break;
+    }
+    default:
+        break;
     }
 }
 

tools/urinfo/urinfo.hpp

@@ -45,6 +45,8 @@ inline void printPlatformInfos(ur_platform_handle_t hPlatform,
     std::cout << prefix;
     printPlatformInfo<ur_platform_backend_t>(hPlatform,
                                              UR_PLATFORM_INFO_BACKEND);
+    std::cout << prefix;
+    printPlatformInfo<ur_adapter_handle_t>(hPlatform, UR_PLATFORM_INFO_ADAPTER);
 }
 
 inline void printDeviceInfos(ur_device_handle_t hDevice,