Add L0 extension for extended module descriptor

Add ZE_experimental_module_program extension to L0 driver to support
multiple input modules being passed to zeModuleCreate().

Signed-off-by: Jaime Arteaga <jaime.a.arteaga.molina@intel.com>

level_zero/core/source/driver/driver_handle_imp.cpp

@@ -105,8 +105,19 @@ ze_result_t DriverHandleImp::getExtensionFunctionAddress(const char *pFuncName,
 
 ze_result_t DriverHandleImp::getExtensionProperties(uint32_t *pCount,
                                                     ze_driver_extension_properties_t *pExtensionProperties) {
+    if (nullptr == pExtensionProperties) {
+        *pCount = static_cast<uint32_t>(this->extensionsSupported.size());
+        return ZE_RESULT_SUCCESS;
+    }
 
-    *pCount = 0;
+    *pCount = std::min(static_cast<uint32_t>(this->extensionsSupported.size()), *pCount);
+
+    for (uint32_t i = 0; i < *pCount; i++) {
+        auto extension = this->extensionsSupported[i];
+        strncpy_s(pExtensionProperties[i].name, ZE_MAX_EXTENSION_NAME,
+                  extension.first.c_str(), extension.first.length() + 1);
+        pExtensionProperties[i].version = extension.second;
+    }
 
     return ZE_RESULT_SUCCESS;
 }

level_zero/core/source/driver/driver_handle_imp.h

@@ -11,6 +11,7 @@
 
 #include "level_zero/core/source/driver/driver_handle.h"
 #include "level_zero/core/source/get_extension_function_lookup_map.h"
+#include "level_zero/extensions/public/ze_exp_ext.h"
 
 namespace L0 {
 
@@ -70,7 +71,6 @@ struct DriverHandleImp : public DriverHandle {
     uint32_t parseAffinityMask(std::vector<std::unique_ptr<NEO::Device>> &neoDevices);
 
     uint32_t numDevices = 0;
-    std::unordered_map<std::string, void *> extensionFunctionsLookupMap;
     std::vector<Device *> devices;
     NEO::MemoryManager *memoryManager = nullptr;
     NEO::SVMAllocsManager *svmAllocsManager = nullptr;
@@ -80,6 +80,13 @@ struct DriverHandleImp : public DriverHandle {
     std::string affinityMaskString = "";
     bool enableProgramDebugging = false;
     bool enableSysman = false;
+
+    // Spec extensions
+    const std::vector<std::pair<std::string, uint32_t>> extensionsSupported = {
+        {ZE_MODULE_PROGRAM_EXP_NAME, ZE_MODULE_PROGRAM_EXP_VERSION_CURRENT}};
+
+    // Experimental functions
+    std::unordered_map<std::string, void *> extensionFunctionsLookupMap;
 };
 
 extern struct DriverHandleImp *GlobalDriver;

level_zero/core/test/unit_tests/sources/driver/test_driver.cpp

@@ -37,12 +37,27 @@ TEST(zeInit, whenCallingZeInitThenInitializeOnDriverIsCalled) {
 
 using DriverVersionTest = Test<DeviceFixture>;
 
-TEST_F(DriverVersionTest, givenCallToGetExtensionPropertiesThenZeroExtensionPropertiesAreReturned) {
+TEST_F(DriverVersionTest,
+       givenCallToGetExtensionPropertiesThenSupportedExtensionsAreReturned) {
     uint32_t count = 0;
-    ze_driver_extension_properties_t properties;
-    ze_result_t res = driverHandle->getExtensionProperties(&count, &properties);
-    EXPECT_EQ(count, 0u);
+    ze_result_t res = driverHandle->getExtensionProperties(&count, nullptr);
+    EXPECT_EQ(count, static_cast<uint32_t>(driverHandle->extensionsSupported.size()));
     EXPECT_EQ(ZE_RESULT_SUCCESS, res);
+
+    ze_driver_extension_properties_t *extensionProperties = new ze_driver_extension_properties_t[count];
+    count++;
+    res = driverHandle->getExtensionProperties(&count, extensionProperties);
+    EXPECT_EQ(count, static_cast<uint32_t>(driverHandle->extensionsSupported.size()));
+    EXPECT_EQ(ZE_RESULT_SUCCESS, res);
+
+    DriverHandleImp *driverHandleImp = static_cast<DriverHandleImp *>(driverHandle.get());
+    for (uint32_t i = 0; i < count; i++) {
+        auto extension = extensionProperties[i];
+        EXPECT_EQ(0, strcmp(extension.name, driverHandleImp->extensionsSupported[i].first.c_str()));
+        EXPECT_EQ(extension.version, driverHandleImp->extensionsSupported[i].second);
+    }
+
+    delete[] extensionProperties;
 }
 
 TEST_F(DriverVersionTest, returnsExpectedDriverVersion) {

level_zero/extensions/public/ze_exp_ext.h

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2020 Intel Corporation
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ */
+
+#pragma once
+
+#include <level_zero/ze_api.h>
+
+// Intel 'oneAPI' Level-Zero Extension for supporting module programs.
+///////////////////////////////////////////////////////////////////////////////
+#ifndef ZE_MODULE_PROGRAM_EXP_NAME
+/// @brief Module Program Extension Name
+#define ZE_MODULE_PROGRAM_EXP_NAME "ZE_experimental_module_program"
+#endif // ZE_MODULE_PROGRAM_EXP_NAME
+
+///////////////////////////////////////////////////////////////////////////////
+/// @brief Module Program Extension Version(s)
+typedef enum _ze_module_program_exp_version_t {
+    ZE_MODULE_PROGRAM_EXP_VERSION_1_0 = ZE_MAKE_VERSION(1, 0),     ///< version 1.0
+    ZE_MODULE_PROGRAM_EXP_VERSION_CURRENT = ZE_MAKE_VERSION(1, 0), ///< latest known version
+    ZE_MODULE_PROGRAM_EXP_VERSION_FORCE_UINT32 = 0x7fffffff
+
+} ze_module_program_exp_version_t;
+
+///////////////////////////////////////////////////////////////////////////////
+/// @brief Module extended descriptor to support multiple input modules.
+///
+/// @details
+///     - Implementation must support ::ZE_experimental_module_program extension
+///     - pInputModules, pBuildFlags, and pConstants from ::ze_module_desc_t is
+///       ignored.
+///     - Format in ::ze_module_desc_t needs to be set to
+///       ::ZE_MODULE_FORMAT_IL_SPIRV.
+typedef struct _ze_module_program_exp_desc_t {
+    ze_structure_type_t stype;                ///< [in] type of this structure
+    const void *pNext;                        ///< [in][optional] pointer to extension-specific structure
+    uint32_t count;                           ///< [in] Count of input modules
+    const size_t *inputSizes;                 ///< [in][range(0, count)] sizes of each input IL module in pInputModules.
+    const uint8_t **pInputModules;            ///< [in][range(0, count)] pointer to an array of IL (e.g. SPIR-V modules).
+                                              ///< Valid only for SPIR-V input.
+    const char **pBuildFlags;                 ///< [in][optional][range(0, count)] array of strings containing build
+                                              ///< flags. See pBuildFlags in ::ze_module_desc_t.
+    const ze_module_constants_t **pConstants; ///< [in][optional][range(0, count)] pointer to array of specialization
+                                              ///< constant strings. Valid only for SPIR-V input. This must be set to
+                                              ///< nullptr if no specialization constants are provided.
+
+} ze_module_program_exp_desc_t;