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//===-- lib/cuda/descriptor.cpp ---------------------------------*- 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
//
//===----------------------------------------------------------------------===//
#include "flang/Runtime/CUDA/descriptor.h"
#include "flang-rt/runtime/descriptor.h"
#include "flang-rt/runtime/terminator.h"
#include "flang/Runtime/CUDA/allocator.h"
#include "flang/Runtime/CUDA/common.h"
#include "cuda_runtime.h"
namespace Fortran::runtime::cuda {
extern "C" {
RT_EXT_API_GROUP_BEGIN
Descriptor *RTDEF(CUFAllocDescriptor)(
std::size_t sizeInBytes, const char *sourceFile, int sourceLine) {
return reinterpret_cast<Descriptor *>(
CUFAllocManaged(sizeInBytes, /*asyncObject=*/nullptr));
}
void RTDEF(CUFFreeDescriptor)(
Descriptor *desc, const char *sourceFile, int sourceLine) {
CUFFreeManaged(reinterpret_cast<void *>(desc));
}
void *RTDEF(CUFGetDeviceAddress)(
void *hostPtr, const char *sourceFile, int sourceLine) {
Terminator terminator{sourceFile, sourceLine};
void *p;
CUDA_REPORT_IF_ERROR(cudaGetSymbolAddress((void **)&p, hostPtr));
if (!p) {
terminator.Crash("Could not retrieve symbol's address");
}
return p;
}
void RTDEF(CUFDescriptorSync)(Descriptor *dst, const Descriptor *src,
const char *sourceFile, int sourceLine) {
std::size_t count{src->SizeInBytes()};
CUDA_REPORT_IF_ERROR(cudaMemcpy(
(void *)dst, (const void *)src, count, cudaMemcpyHostToDevice));
}
void RTDEF(CUFSyncGlobalDescriptor)(
void *hostPtr, const char *sourceFile, int sourceLine) {
void *devAddr{RTNAME(CUFGetDeviceAddress)(hostPtr, sourceFile, sourceLine)};
RTNAME(CUFDescriptorSync)
((Descriptor *)devAddr, (Descriptor *)hostPtr, sourceFile, sourceLine);
}
void RTDEF(CUFDescriptorCheckSection)(
const Descriptor *desc, const char *sourceFile, int sourceLine) {
if (desc && !desc->IsContiguous()) {
Terminator terminator{sourceFile, sourceLine};
terminator.Crash("device array section argument is not contiguous");
}
}
RT_EXT_API_GROUP_END
}
} // namespace Fortran::runtime::cuda
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