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//===- AMDGPUArchByHIP.cpp - list AMDGPU installed ----------*- C++ -*-----===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file implements a tool for detecting name of AMDGPU installed in system
// using HIP runtime. This tool is used by AMDGPU OpenMP and HIP driver.
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ConvertUTF.h"
#include "llvm/Support/DynamicLibrary.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/VersionTuple.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <string>
#include <vector>
#ifdef _WIN32
#include <windows.h>
#endif
using namespace llvm;
typedef struct {
char padding[396];
char gcnArchName[256];
char padding2[1024];
} hipDeviceProp_t;
typedef enum {
hipSuccess = 0,
} hipError_t;
typedef hipError_t (*hipGetDeviceCount_t)(int *);
typedef hipError_t (*hipDeviceGet_t)(int *, int);
typedef hipError_t (*hipGetDeviceProperties_t)(hipDeviceProp_t *, int);
extern cl::opt<bool> Verbose;
#ifdef _WIN32
static std::vector<std::string> getSearchPaths() {
std::vector<std::string> Paths;
// Get the directory of the current executable
if (auto MainExe = sys::fs::getMainExecutable(nullptr, nullptr);
!MainExe.empty())
Paths.push_back(sys::path::parent_path(MainExe).str());
// Get the system directory
wchar_t SystemDirectory[MAX_PATH];
if (GetSystemDirectoryW(SystemDirectory, MAX_PATH) > 0) {
std::string Utf8SystemDir;
if (convertUTF16ToUTF8String(
ArrayRef<UTF16>(reinterpret_cast<const UTF16 *>(SystemDirectory),
wcslen(SystemDirectory)),
Utf8SystemDir))
Paths.push_back(Utf8SystemDir);
}
// Get the Windows directory
wchar_t WindowsDirectory[MAX_PATH];
if (GetWindowsDirectoryW(WindowsDirectory, MAX_PATH) > 0) {
std::string Utf8WindowsDir;
if (convertUTF16ToUTF8String(
ArrayRef<UTF16>(reinterpret_cast<const UTF16 *>(WindowsDirectory),
wcslen(WindowsDirectory)),
Utf8WindowsDir))
Paths.push_back(Utf8WindowsDir);
}
// Get the current working directory
SmallVector<char, 256> CWD;
if (sys::fs::current_path(CWD))
Paths.push_back(std::string(CWD.begin(), CWD.end()));
// Get the PATH environment variable
if (std::optional<std::string> PathEnv = sys::Process::GetEnv("PATH")) {
SmallVector<StringRef, 16> PathList;
StringRef(*PathEnv).split(PathList, sys::EnvPathSeparator);
for (auto &Path : PathList)
Paths.push_back(Path.str());
}
return Paths;
}
// Custom comparison function for dll name
static bool compareVersions(StringRef A, StringRef B) {
auto ParseVersion = [](StringRef S) -> VersionTuple {
size_t Pos = S.find_last_of('_');
StringRef VerStr = (Pos == StringRef::npos) ? S : S.substr(Pos + 1);
VersionTuple Vt;
(void)Vt.tryParse(VerStr);
return Vt;
};
VersionTuple VtA = ParseVersion(A);
VersionTuple VtB = ParseVersion(B);
return VtA > VtB;
}
#endif
// On Windows, prefer amdhip64_n.dll where n is ROCm major version and greater
// value of n takes precedence. If amdhip64_n.dll is not found, fall back to
// amdhip64.dll. The reason is that a normal driver installation only has
// amdhip64_n.dll but we do not know what n is since this program may be used
// with a future version of HIP runtime.
//
// On Linux, always use default libamdhip64.so.
static std::pair<std::string, bool> findNewestHIPDLL() {
#ifdef _WIN32
StringRef HipDLLPrefix = "amdhip64_";
StringRef HipDLLSuffix = ".dll";
std::vector<std::string> SearchPaths = getSearchPaths();
std::vector<std::string> DLLNames;
for (const auto &Dir : SearchPaths) {
std::error_code EC;
for (sys::fs::directory_iterator DirIt(Dir, EC), DirEnd;
DirIt != DirEnd && !EC; DirIt.increment(EC)) {
StringRef Filename = sys::path::filename(DirIt->path());
if (Filename.starts_with(HipDLLPrefix) &&
Filename.ends_with(HipDLLSuffix))
DLLNames.push_back(sys::path::convert_to_slash(DirIt->path()));
}
if (!DLLNames.empty())
break;
}
if (DLLNames.empty())
return {"amdhip64.dll", true};
llvm::sort(DLLNames, compareVersions);
return {DLLNames[0], false};
#else
// On Linux, fallback to default shared object
return {"libamdhip64.so", true};
#endif
}
int printGPUsByHIP() {
auto [DynamicHIPPath, IsFallback] = findNewestHIPDLL();
if (Verbose) {
if (IsFallback)
outs() << "Using default HIP runtime: " << DynamicHIPPath << '\n';
else
outs() << "Found HIP runtime: " << DynamicHIPPath << '\n';
}
std::string ErrMsg;
auto DynlibHandle = std::make_unique<llvm::sys::DynamicLibrary>(
llvm::sys::DynamicLibrary::getPermanentLibrary(DynamicHIPPath.c_str(),
&ErrMsg));
if (!DynlibHandle->isValid()) {
if (Verbose)
llvm::errs() << "Failed to load " << DynamicHIPPath << ": " << ErrMsg
<< '\n';
return 1;
}
#define DYNAMIC_INIT_HIP(SYMBOL) \
{ \
void *SymbolPtr = DynlibHandle->getAddressOfSymbol(#SYMBOL); \
if (!SymbolPtr) { \
llvm::errs() << "Failed to find symbol " << #SYMBOL << '\n'; \
return 1; \
} \
SYMBOL = reinterpret_cast<decltype(SYMBOL)>(SymbolPtr); \
}
hipGetDeviceCount_t hipGetDeviceCount;
hipDeviceGet_t hipDeviceGet;
hipGetDeviceProperties_t hipGetDeviceProperties;
DYNAMIC_INIT_HIP(hipGetDeviceCount);
DYNAMIC_INIT_HIP(hipDeviceGet);
DYNAMIC_INIT_HIP(hipGetDeviceProperties);
#undef DYNAMIC_INIT_HIP
int deviceCount;
hipError_t err = hipGetDeviceCount(&deviceCount);
if (err != hipSuccess) {
llvm::errs() << "Failed to get device count\n";
return 1;
}
for (int i = 0; i < deviceCount; ++i) {
int deviceId;
err = hipDeviceGet(&deviceId, i);
if (err != hipSuccess) {
llvm::errs() << "Failed to get device id for ordinal " << i << '\n';
return 1;
}
hipDeviceProp_t prop;
err = hipGetDeviceProperties(&prop, deviceId);
if (err != hipSuccess) {
llvm::errs() << "Failed to get device properties for device " << deviceId
<< '\n';
return 1;
}
llvm::outs() << prop.gcnArchName << '\n';
}
return 0;
}
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