330d8983d2
In a nutshell, this moves our libomptarget code to populate the offload subproject. With this commit, users need to enable the new LLVM/Offload subproject as a runtime in their cmake configuration. No further changes are expected for downstream code. Tests and other components still depend on OpenMP and have also not been renamed. The results below are for a build in which OpenMP and Offload are enabled runtimes. In addition to the pure `git mv`, we needed to adjust some CMake files. Nothing is intended to change semantics. ``` ninja check-offload ``` Works with the X86 and AMDGPU offload tests ``` ninja check-openmp ``` Still works but doesn't build offload tests anymore. ``` ls install/lib ``` Shows all expected libraries, incl. - `libomptarget.devicertl.a` - `libomptarget-nvptx-sm_90.bc` - `libomptarget.rtl.amdgpu.so` -> `libomptarget.rtl.amdgpu.so.18git` - `libomptarget.so` -> `libomptarget.so.18git` Fixes: https://github.com/llvm/llvm-project/issues/75124 --------- Co-authored-by: Saiyedul Islam <Saiyedul.Islam@amd.com>
171 lines
4.5 KiB
C++
171 lines
4.5 KiB
C++
//===--- cuda/dynamic_cuda/cuda.pp ------------------------------- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Implement subset of cuda api by calling into cuda library via dlopen
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// Does the dlopen/dlsym calls as part of the call to cuInit
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/DynamicLibrary.h"
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#include "Shared/Debug.h"
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#include "DLWrap.h"
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#include "cuda.h"
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#include <memory>
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#include <string>
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#include <unordered_map>
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DLWRAP_INITIALIZE()
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DLWRAP_INTERNAL(cuInit, 1)
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DLWRAP(cuCtxGetDevice, 1)
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DLWRAP(cuDeviceGet, 2)
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DLWRAP(cuDeviceGetAttribute, 3)
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DLWRAP(cuDeviceGetCount, 1)
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DLWRAP(cuFuncGetAttribute, 3)
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// Device info
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DLWRAP(cuDeviceGetName, 3)
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DLWRAP(cuDeviceTotalMem, 2)
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DLWRAP(cuDriverGetVersion, 1)
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DLWRAP(cuGetErrorString, 2)
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DLWRAP(cuLaunchKernel, 11)
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DLWRAP(cuMemAlloc, 2)
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DLWRAP(cuMemAllocHost, 2)
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DLWRAP(cuMemAllocManaged, 3)
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DLWRAP(cuMemAllocAsync, 3)
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DLWRAP(cuMemcpyDtoDAsync, 4)
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DLWRAP(cuMemcpyDtoH, 3)
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DLWRAP(cuMemcpyDtoHAsync, 4)
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DLWRAP(cuMemcpyHtoD, 3)
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DLWRAP(cuMemcpyHtoDAsync, 4)
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DLWRAP(cuMemFree, 1)
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DLWRAP(cuMemFreeHost, 1)
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DLWRAP(cuMemFreeAsync, 2)
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DLWRAP(cuModuleGetFunction, 3)
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DLWRAP(cuModuleGetGlobal, 4)
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DLWRAP(cuModuleUnload, 1)
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DLWRAP(cuStreamCreate, 2)
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DLWRAP(cuStreamDestroy, 1)
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DLWRAP(cuStreamSynchronize, 1)
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DLWRAP(cuStreamQuery, 1)
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DLWRAP(cuCtxSetCurrent, 1)
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DLWRAP(cuDevicePrimaryCtxRelease, 1)
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DLWRAP(cuDevicePrimaryCtxGetState, 3)
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DLWRAP(cuDevicePrimaryCtxSetFlags, 2)
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DLWRAP(cuDevicePrimaryCtxRetain, 2)
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DLWRAP(cuModuleLoadDataEx, 5)
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DLWRAP(cuDeviceCanAccessPeer, 3)
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DLWRAP(cuCtxEnablePeerAccess, 2)
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DLWRAP(cuMemcpyPeerAsync, 6)
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DLWRAP(cuCtxGetLimit, 2)
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DLWRAP(cuCtxSetLimit, 2)
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DLWRAP(cuEventCreate, 2)
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DLWRAP(cuEventRecord, 2)
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DLWRAP(cuStreamWaitEvent, 3)
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DLWRAP(cuEventSynchronize, 1)
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DLWRAP(cuEventDestroy, 1)
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DLWRAP_FINALIZE()
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DLWRAP(cuMemUnmap, 2)
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DLWRAP(cuMemRelease, 1)
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DLWRAP(cuMemAddressFree, 2)
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DLWRAP(cuMemGetInfo, 2)
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DLWRAP(cuMemAddressReserve, 5)
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DLWRAP(cuMemMap, 5)
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DLWRAP(cuMemCreate, 4)
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DLWRAP(cuMemSetAccess, 4)
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DLWRAP(cuMemGetAllocationGranularity, 3)
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#ifndef DYNAMIC_CUDA_PATH
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#define DYNAMIC_CUDA_PATH "libcuda.so"
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#endif
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#ifndef TARGET_NAME
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#define TARGET_NAME CUDA
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#endif
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#ifndef DEBUG_PREFIX
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#define DEBUG_PREFIX "Target " GETNAME(TARGET_NAME) " RTL"
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#endif
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static bool checkForCUDA() {
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// return true if dlopen succeeded and all functions found
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// Prefer _v2 versions of functions if found in the library
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std::unordered_map<std::string, const char *> TryFirst = {
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{"cuMemAlloc", "cuMemAlloc_v2"},
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{"cuMemFree", "cuMemFree_v2"},
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{"cuMemcpyDtoH", "cuMemcpyDtoH_v2"},
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{"cuMemcpyHtoD", "cuMemcpyHtoD_v2"},
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{"cuStreamDestroy", "cuStreamDestroy_v2"},
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{"cuModuleGetGlobal", "cuModuleGetGlobal_v2"},
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{"cuMemcpyDtoHAsync", "cuMemcpyDtoHAsync_v2"},
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{"cuMemcpyDtoDAsync", "cuMemcpyDtoDAsync_v2"},
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{"cuMemcpyHtoDAsync", "cuMemcpyHtoDAsync_v2"},
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{"cuDevicePrimaryCtxRelease", "cuDevicePrimaryCtxRelease_v2"},
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{"cuDevicePrimaryCtxSetFlags", "cuDevicePrimaryCtxSetFlags_v2"},
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};
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const char *CudaLib = DYNAMIC_CUDA_PATH;
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std::string ErrMsg;
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auto DynlibHandle = std::make_unique<llvm::sys::DynamicLibrary>(
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llvm::sys::DynamicLibrary::getPermanentLibrary(CudaLib, &ErrMsg));
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if (!DynlibHandle->isValid()) {
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DP("Unable to load library '%s': %s!\n", CudaLib, ErrMsg.c_str());
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return false;
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}
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for (size_t I = 0; I < dlwrap::size(); I++) {
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const char *Sym = dlwrap::symbol(I);
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auto It = TryFirst.find(Sym);
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if (It != TryFirst.end()) {
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const char *First = It->second;
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void *P = DynlibHandle->getAddressOfSymbol(First);
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if (P) {
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DP("Implementing %s with dlsym(%s) -> %p\n", Sym, First, P);
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*dlwrap::pointer(I) = P;
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continue;
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}
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}
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void *P = DynlibHandle->getAddressOfSymbol(Sym);
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if (P == nullptr) {
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DP("Unable to find '%s' in '%s'!\n", Sym, CudaLib);
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return false;
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}
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DP("Implementing %s with dlsym(%s) -> %p\n", Sym, Sym, P);
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*dlwrap::pointer(I) = P;
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}
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return true;
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}
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CUresult cuInit(unsigned X) {
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// Note: Called exactly once from cuda rtl.cpp in a global constructor so
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// does not need to handle being called repeatedly or concurrently
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if (!checkForCUDA()) {
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return CUDA_ERROR_INVALID_HANDLE;
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}
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return dlwrap_cuInit(X);
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}
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