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//===--- Level Zero Target RTL Implementation -----------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// Plugin interface for SPIR-V/Xe machine.
//
//===----------------------------------------------------------------------===//
#ifndef OPENMP_LIBOMPTARGET_PLUGINS_NEXTGEN_LEVEL_ZERO_L0PLUGIN_H
#define OPENMP_LIBOMPTARGET_PLUGINS_NEXTGEN_LEVEL_ZERO_L0PLUGIN_H
#include "AsyncQueue.h"
#include "L0Defs.h"
#include "L0Device.h"
#include "L0Memory.h"
#include "L0Options.h"
#include "L0Program.h"
#include "TLS.h"
namespace llvm::omp::target::plugin {
/// Class implementing the LevelZero specific functionalities of the plugin.
class LevelZeroPluginTy final : public GenericPluginTy {
private:
struct DeviceInfoTy {
L0DeviceIdTy Id;
L0ContextTy *Driver;
bool isRoot() const { return Id.SubId < 0 && Id.CCSId < 0; }
};
llvm::SmallVector<DeviceInfoTy> DetectedDevices;
/// Context (and Driver) specific data.
std::list<L0ContextTy> ContextList;
// Table containing per-thread information using TLS.
L0ThreadTblTy ThreadTLSTable;
// Table containing per-thread information for each device using TLS.
L0DeviceTLSTableTy DeviceTLSTable;
// Table containing per-thread information for each Context using TLS.
L0ContextTLSTableTy ContextTLSTable;
/// L0 plugin options.
L0OptionsTy Options;
/// Common pool of AsyncQueue.
AsyncQueuePoolTy AsyncQueuePool;
L0ThreadTLSTy &getTLS() { return ThreadTLSTable.get(); }
/// Find L0 devices and initialize device properties.
/// Returns number of devices reported to omptarget.
Expected<int32_t> findDevices();
public:
LevelZeroPluginTy() : GenericPluginTy(getTripleArch()) {}
virtual ~LevelZeroPluginTy() = default;
L0DeviceTLSTy &getDeviceTLS(int32_t DeviceId) {
return DeviceTLSTable.get(DeviceId);
}
L0ContextTLSTy &getContextTLS(ze_context_handle_t Context) {
return ContextTLSTable.get(Context);
}
const L0OptionsTy &getOptions() { return Options; }
const L0DeviceTy &getDeviceFromId(int32_t DeviceId) const {
return static_cast<const L0DeviceTy &>(getDevice(DeviceId));
}
L0DeviceTy &getDeviceFromId(int32_t DeviceId) {
return static_cast<L0DeviceTy &>(getDevice(DeviceId));
}
AsyncQueueTy *getAsyncQueue() {
auto *Queue = getTLS().getAsyncQueue();
if (!Queue)
Queue = AsyncQueuePool.get();
return Queue;
}
void releaseAsyncQueue(AsyncQueueTy *Queue) {
if (!Queue)
return;
Queue->reset();
if (!getTLS().releaseAsyncQueue(Queue))
AsyncQueuePool.release(Queue);
}
// Plugin interface.
Expected<int32_t> initImpl() override;
Error deinitImpl() override;
GenericDeviceTy *createDevice(GenericPluginTy &Plugin, int32_t DeviceId,
int32_t NumDevices) override;
GenericGlobalHandlerTy *createGlobalHandler() override;
uint16_t getMagicElfBits() const override { return ELF::EM_INTELGT; }
Triple::ArchType getTripleArch() const override { return Triple::spirv64; }
const char *getName() const override { return GETNAME(TARGET_NAME); }
Expected<bool> isELFCompatible(uint32_t DeviceId,
StringRef Image) const override;
Error flushQueueImpl(omp_interop_val_t *Interop) override;
Error syncBarrierImpl(omp_interop_val_t *Interop) override;
Error asyncBarrierImpl(omp_interop_val_t *Interop) override;
};
} // namespace llvm::omp::target::plugin
#endif // OPENMP_LIBOMPTARGET_PLUGINS_NEXTGEN_LEVEL_ZERO_L0PLUGIN_H
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