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>
70 lines
2.7 KiB
C++
70 lines
2.7 KiB
C++
//===- RPC.h - Interface for remote procedure calls from the GPU ----------===//
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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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// This file provides the interface to support remote procedure calls (RPC) from
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// the GPU. This is required to implement host services like printf or malloc.
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// The interface to the RPC server is provided by the 'libc' project in LLVM.
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// For more information visit https://libc.llvm.org/gpu/.
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//
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//===----------------------------------------------------------------------===//
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#ifndef OPENMP_LIBOMPTARGET_PLUGINS_NEXTGEN_COMMON_RPC_H
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#define OPENMP_LIBOMPTARGET_PLUGINS_NEXTGEN_COMMON_RPC_H
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/Support/Error.h"
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#include <cstdint>
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namespace llvm::omp::target {
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namespace plugin {
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struct GenericPluginTy;
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struct GenericDeviceTy;
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class GenericGlobalHandlerTy;
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class DeviceImageTy;
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} // namespace plugin
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/// A generic class implementing the interface between the RPC server provided
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/// by the 'libc' project and 'libomptarget'. If the RPC server is not availible
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/// these routines will perform no action.
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struct RPCServerTy {
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public:
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/// Initializes the handles to the number of devices we may need to service.
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RPCServerTy(plugin::GenericPluginTy &Plugin);
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/// Check if this device image is using an RPC server. This checks for the
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/// precense of an externally visible symbol in the device image that will
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/// be present whenever RPC code is called.
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llvm::Expected<bool> isDeviceUsingRPC(plugin::GenericDeviceTy &Device,
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plugin::GenericGlobalHandlerTy &Handler,
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plugin::DeviceImageTy &Image);
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/// Initialize the RPC server for the given device. This will allocate host
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/// memory for the internal server and copy the data to the client on the
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/// device. The device must be loaded before this is valid.
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llvm::Error initDevice(plugin::GenericDeviceTy &Device,
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plugin::GenericGlobalHandlerTy &Handler,
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plugin::DeviceImageTy &Image);
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/// Runs the RPC server associated with the \p Device until the pending work
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/// is cleared.
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llvm::Error runServer(plugin::GenericDeviceTy &Device);
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/// Deinitialize the RPC server for the given device. This will free the
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/// memory associated with the k
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llvm::Error deinitDevice(plugin::GenericDeviceTy &Device);
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private:
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/// Array from this device's identifier to its attached devices.
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llvm::SmallVector<uintptr_t> Handles;
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};
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} // namespace llvm::omp::target
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#endif
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