90 lines
3.3 KiB
C++
90 lines
3.3 KiB
C++
/*
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* Copyright (C) 2020 Intel Corporation
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*
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* SPDX-License-Identifier: MIT
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*
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*/
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#include "level_zero/tools/source/sysman/linux/pmt.h"
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#include "shared/source/debug_settings/debug_settings_manager.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <string.h>
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#include <sys/mman.h>
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namespace L0 {
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const std::string PlatformMonitoringTech::baseTelemDevice("/dev/telem");
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const std::string PlatformMonitoringTech::baseTelemSysFS("/sys/class/pmt_telem/telem");
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void PlatformMonitoringTech::init(const std::string &deviceName, FsAccess *pFsAccess) {
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pmtSupported = false;
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std::string deviceNumber("1"); // Temporarily hardcoded
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std::string telemetryDeviceEntry = baseTelemDevice + deviceNumber;
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if (!pFsAccess->fileExists(telemetryDeviceEntry)) {
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NEO::printDebugString(NEO::DebugManager.flags.PrintDebugMessages.get(), stderr,
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"Telemetry support not available. No file %s\n", telemetryDeviceEntry.c_str());
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return;
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}
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std::string guid;
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std::string guidPath = baseTelemSysFS + deviceNumber + std::string("/guid");
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ze_result_t result = pFsAccess->read(guidPath, guid);
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if (ZE_RESULT_SUCCESS != result) {
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NEO::printDebugString(NEO::DebugManager.flags.PrintDebugMessages.get(), stderr,
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"Telemetry sysfs entry not available %s\n", guidPath.c_str());
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return;
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}
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std::string sizePath = baseTelemSysFS + deviceNumber + std::string("/size");
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result = pFsAccess->read(sizePath, size);
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if (ZE_RESULT_SUCCESS != result) {
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NEO::printDebugString(NEO::DebugManager.flags.PrintDebugMessages.get(), stderr,
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"Telemetry sysfs entry not available %s\n", sizePath.c_str());
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return;
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}
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std::string offsetPath = baseTelemSysFS + deviceNumber + std::string("/offset");
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result = pFsAccess->read(offsetPath, baseOffset);
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if (ZE_RESULT_SUCCESS != result) {
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NEO::printDebugString(NEO::DebugManager.flags.PrintDebugMessages.get(), stderr,
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"Telemetry sysfs entry not available %s\n", offsetPath.c_str());
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return;
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}
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int fd = open(static_cast<const char *>(telemetryDeviceEntry.c_str()), O_RDONLY);
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if (fd == -1) {
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NEO::printDebugString(NEO::DebugManager.flags.PrintDebugMessages.get(), stderr,
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"Failure opening telemetry file %s : %s \n", telemetryDeviceEntry.c_str(), strerror(errno));
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return;
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}
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mappedMemory = static_cast<char *>(mmap(nullptr, static_cast<size_t>(size), PROT_READ, MAP_SHARED, fd, 0));
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if (mappedMemory == MAP_FAILED) {
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NEO::printDebugString(NEO::DebugManager.flags.PrintDebugMessages.get(), stderr,
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"Failure mapping telemetry file %s : %s \n", telemetryDeviceEntry.c_str(), strerror(errno));
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close(fd);
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return;
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}
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if (close(fd) == -1) {
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NEO::printDebugString(NEO::DebugManager.flags.PrintDebugMessages.get(), stderr,
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"Failure closing telemetry file %s : %s \n", telemetryDeviceEntry.c_str(), strerror(errno));
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munmap(mappedMemory, size);
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return;
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}
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mappedMemory += baseOffset;
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pmtSupported = true;
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}
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PlatformMonitoringTech::~PlatformMonitoringTech() {
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if (mappedMemory != nullptr) {
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munmap(mappedMemory - baseOffset, size);
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}
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}
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} // namespace L0
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