| 1 | //===-- lib/cuda/descriptor.cpp ---------------------------------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "flang/Runtime/CUDA/descriptor.h" |
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| 10 | #include "flang-rt/runtime/descriptor.h" |
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| 11 | #include "flang-rt/runtime/terminator.h" |
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| 12 | #include "flang/Runtime/CUDA/allocator.h" |
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| 13 | #include "flang/Runtime/CUDA/common.h" |
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| 14 | |
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| 15 | #include "cuda_runtime.h" |
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| 16 | |
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| 17 | namespace Fortran::runtime::cuda { |
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| 18 | extern "C" { |
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| 19 | RT_EXT_API_GROUP_BEGIN |
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| 20 | |
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| 21 | Descriptor *RTDEF(CUFAllocDescriptor)( |
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| 22 | std::size_t sizeInBytes, const char *sourceFile, int sourceLine) { |
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| 23 | return reinterpret_cast<Descriptor *>( |
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| 24 | CUFAllocManaged(sizeInBytes, /*asyncObject=*/nullptr)); |
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| 25 | } |
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| 26 | |
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| 27 | void RTDEF(CUFFreeDescriptor)( |
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| 28 | Descriptor *desc, const char *sourceFile, int sourceLine) { |
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| 29 | CUFFreeManaged(reinterpret_cast<void *>(desc)); |
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| 30 | } |
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| 31 | |
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| 32 | void *RTDEF(CUFGetDeviceAddress)( |
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| 33 | void *hostPtr, const char *sourceFile, int sourceLine) { |
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| 34 | Terminator terminator{sourceFile, sourceLine}; |
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| 35 | void *p; |
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| 36 | CUDA_REPORT_IF_ERROR(cudaGetSymbolAddress((void **)&p, hostPtr)); |
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| 37 | if (!p) { |
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| 38 | terminator.Crash("Could not retrieve symbol's address" ); |
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| 39 | } |
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| 40 | return p; |
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| 41 | } |
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| 42 | |
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| 43 | void RTDEF(CUFDescriptorSync)(Descriptor *dst, const Descriptor *src, |
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| 44 | const char *sourceFile, int sourceLine) { |
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| 45 | std::size_t count{src->SizeInBytes()}; |
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| 46 | CUDA_REPORT_IF_ERROR(cudaMemcpy( |
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| 47 | (void *)dst, (const void *)src, count, cudaMemcpyHostToDevice)); |
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| 48 | } |
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| 49 | |
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| 50 | void RTDEF(CUFSyncGlobalDescriptor)( |
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| 51 | void *hostPtr, const char *sourceFile, int sourceLine) { |
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| 52 | void *devAddr{RTNAME(CUFGetDeviceAddress)(hostPtr, sourceFile, sourceLine)}; |
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| 53 | RTNAME(CUFDescriptorSync) |
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| 54 | ((Descriptor *)devAddr, (Descriptor *)hostPtr, sourceFile, sourceLine); |
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| 55 | } |
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| 56 | |
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| 57 | RT_EXT_API_GROUP_END |
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| 58 | } |
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| 59 | } // namespace Fortran::runtime::cuda |
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| 60 | |
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