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//===- SyclRuntimeWrappers.cpp - MLIR SYCL wrapper library ------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Implements wrappers around the sycl runtime library with C linkage
//
//===----------------------------------------------------------------------===//
#include <CL/sycl.hpp>
#include <level_zero/ze_api.h>
#include <sycl/ext/oneapi/backend/level_zero.hpp>
#ifdef _WIN32
#define SYCL_RUNTIME_EXPORT __declspec(dllexport)
#else
#define SYCL_RUNTIME_EXPORT
#endif // _WIN32
namespace {
template <typename F>
auto catchAll(F &&func) {
try {
return func();
} catch (const std::exception &e) {
fprintf(stdout, "An exception was thrown: %s\n", e.what());
fflush(stdout);
abort();
} catch (...) {
fprintf(stdout, "An unknown exception was thrown\n");
fflush(stdout);
abort();
}
}
#define L0_SAFE_CALL(call) \
{ \
ze_result_t status = (call); \
if (status != ZE_RESULT_SUCCESS) { \
fprintf(stdout, "L0 error %d\n", status); \
fflush(stdout); \
abort(); \
} \
}
} // namespace
static sycl::device getDefaultDevice() {
static sycl::device syclDevice;
static bool isDeviceInitialised = false;
if (!isDeviceInitialised) {
auto platformList = sycl::platform::get_platforms();
for (const auto &platform : platformList) {
auto platformName = platform.get_info<sycl::info::platform::name>();
bool isLevelZero = platformName.find("Level-Zero") != std::string::npos;
if (!isLevelZero)
continue;
syclDevice = platform.get_devices()[0];
isDeviceInitialised = true;
return syclDevice;
}
throw std::runtime_error("getDefaultDevice failed");
} else
return syclDevice;
}
static sycl::context getDefaultContext() {
static sycl::context syclContext{getDefaultDevice()};
return syclContext;
}
static void *allocDeviceMemory(sycl::queue *queue, size_t size, bool isShared) {
void *memPtr = nullptr;
if (isShared) {
memPtr = sycl::aligned_alloc_shared(64, size, getDefaultDevice(),
getDefaultContext());
} else {
memPtr = sycl::aligned_alloc_device(64, size, getDefaultDevice(),
getDefaultContext());
}
if (memPtr == nullptr) {
throw std::runtime_error("mem allocation failed!");
}
return memPtr;
}
static void deallocDeviceMemory(sycl::queue *queue, void *ptr) {
sycl::free(ptr, *queue);
}
static ze_module_handle_t loadModule(const void *data, size_t dataSize) {
assert(data);
ze_module_handle_t zeModule;
ze_module_desc_t desc = {ZE_STRUCTURE_TYPE_MODULE_DESC,
nullptr,
ZE_MODULE_FORMAT_IL_SPIRV,
dataSize,
(const uint8_t *)data,
nullptr,
nullptr};
auto zeDevice = sycl::get_native<sycl::backend::ext_oneapi_level_zero>(
getDefaultDevice());
auto zeContext = sycl::get_native<sycl::backend::ext_oneapi_level_zero>(
getDefaultContext());
L0_SAFE_CALL(zeModuleCreate(zeContext, zeDevice, &desc, &zeModule, nullptr));
return zeModule;
}
static sycl::kernel *getKernel(ze_module_handle_t zeModule, const char *name) {
assert(zeModule);
assert(name);
ze_kernel_handle_t zeKernel;
ze_kernel_desc_t desc = {};
desc.pKernelName = name;
L0_SAFE_CALL(zeKernelCreate(zeModule, &desc, &zeKernel));
sycl::kernel_bundle<sycl::bundle_state::executable> kernelBundle =
sycl::make_kernel_bundle<sycl::backend::ext_oneapi_level_zero,
sycl::bundle_state::executable>(
{zeModule}, getDefaultContext());
auto kernel = sycl::make_kernel<sycl::backend::ext_oneapi_level_zero>(
{kernelBundle, zeKernel}, getDefaultContext());
return new sycl::kernel(kernel);
}
static void launchKernel(sycl::queue *queue, sycl::kernel *kernel, size_t gridX,
size_t gridY, size_t gridZ, size_t blockX,
size_t blockY, size_t blockZ, size_t sharedMemBytes,
void **params, size_t paramsCount) {
auto syclGlobalRange =
sycl::range<3>(blockZ * gridZ, blockY * gridY, blockX * gridX);
auto syclLocalRange = sycl::range<3>(blockZ, blockY, blockX);
sycl::nd_range<3> syclNdRange(syclGlobalRange, syclLocalRange);
queue->submit([&](sycl::handler &cgh) {
for (size_t i = 0; i < paramsCount; i++) {
cgh.set_arg(static_cast<uint32_t>(i), *(static_cast<void **>(params[i])));
}
cgh.parallel_for(syclNdRange, *kernel);
});
}
// Wrappers
extern "C" SYCL_RUNTIME_EXPORT sycl::queue *mgpuStreamCreate() {
return catchAll([&]() {
sycl::queue *queue =
new sycl::queue(getDefaultContext(), getDefaultDevice());
return queue;
});
}
extern "C" SYCL_RUNTIME_EXPORT void mgpuStreamDestroy(sycl::queue *queue) {
catchAll([&]() { delete queue; });
}
extern "C" SYCL_RUNTIME_EXPORT void *
mgpuMemAlloc(uint64_t size, sycl::queue *queue, bool isShared) {
return catchAll([&]() {
return allocDeviceMemory(queue, static_cast<size_t>(size), true);
});
}
extern "C" SYCL_RUNTIME_EXPORT void mgpuMemFree(void *ptr, sycl::queue *queue) {
catchAll([&]() {
if (ptr) {
deallocDeviceMemory(queue, ptr);
}
});
}
extern "C" SYCL_RUNTIME_EXPORT ze_module_handle_t
mgpuModuleLoad(const void *data, size_t gpuBlobSize) {
return catchAll([&]() { return loadModule(data, gpuBlobSize); });
}
extern "C" SYCL_RUNTIME_EXPORT sycl::kernel *
mgpuModuleGetFunction(ze_module_handle_t module, const char *name) {
return catchAll([&]() { return getKernel(module, name); });
}
extern "C" SYCL_RUNTIME_EXPORT void
mgpuLaunchKernel(sycl::kernel *kernel, size_t gridX, size_t gridY, size_t gridZ,
size_t blockX, size_t blockY, size_t blockZ,
size_t sharedMemBytes, sycl::queue *queue, void **params,
void ** /*extra*/, size_t paramsCount) {
return catchAll([&]() {
launchKernel(queue, kernel, gridX, gridY, gridZ, blockX, blockY, blockZ,
sharedMemBytes, params, paramsCount);
});
}
extern "C" SYCL_RUNTIME_EXPORT void mgpuStreamSynchronize(sycl::queue *queue) {
catchAll([&]() { queue->wait(); });
}
extern "C" SYCL_RUNTIME_EXPORT void
mgpuModuleUnload(ze_module_handle_t module) {
catchAll([&]() { L0_SAFE_CALL(zeModuleDestroy(module)); });
}
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