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