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/*
* Copyright (C) 2019-2020 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#include "level_zero/tools/source/sysman/pci/linux/os_pci_imp.h"
#include "level_zero/tools/source/sysman/linux/fs_access.h"
#include "level_zero/tools/source/sysman/sysman_const.h"
#include "sysman/linux/os_sysman_imp.h"
#include "sysman/pci/pci_imp.h"
namespace L0 {
const std::string LinuxPciImp::deviceDir("device");
const std::string LinuxPciImp::resourceFile("device/resource");
const std::string LinuxPciImp::maxLinkSpeedFile("device/max_link_speed");
const std::string LinuxPciImp::maxLinkWidthFile("device/max_link_width");
std::string LinuxPciImp::changeDirNLevelsUp(std::string realRootPath, uint8_t nLevel) {
size_t loc;
while (nLevel > 0) {
loc = realRootPath.find_last_of('/');
realRootPath = realRootPath.substr(0, loc);
nLevel--;
}
return realRootPath;
}
ze_result_t LinuxPciImp::getProperties(zes_pci_properties_t *properties) {
properties->haveBandwidthCounters = false;
properties->havePacketCounters = false;
properties->haveReplayCounters = false;
return ZE_RESULT_SUCCESS;
}
ze_result_t LinuxPciImp::getPciBdf(std::string &bdf) {
std::string bdfDir;
ze_result_t result = pSysfsAccess->readSymLink(deviceDir, bdfDir);
if (ZE_RESULT_SUCCESS != result) {
return result;
}
const auto loc = bdfDir.find_last_of('/');
bdf = bdfDir.substr(loc + 1);
return ZE_RESULT_SUCCESS;
}
ze_result_t LinuxPciImp::getMaxLinkSpeed(double &maxLinkSpeed) {
ze_result_t result;
if (isLmemSupported) {
std::string rootPortPath;
std::string realRootPath;
result = pSysfsAccess->getRealPath(deviceDir, realRootPath);
// we need to change the absolute path to two levels up to get actual
// values of speed and width at the Discrete card's root port.
// the root port is always at a fixed distance as defined in HW
rootPortPath = changeDirNLevelsUp(realRootPath, 2);
if (ZE_RESULT_SUCCESS != result) {
maxLinkSpeed = 0;
return result;
}
result = pfsAccess->read(rootPortPath + '/' + "max_link_speed", maxLinkSpeed);
if (ZE_RESULT_SUCCESS != result) {
maxLinkSpeed = 0;
return result;
}
} else {
result = pSysfsAccess->read(maxLinkSpeedFile, maxLinkSpeed);
if (ZE_RESULT_SUCCESS != result) {
maxLinkSpeed = 0;
return result;
}
}
return ZE_RESULT_SUCCESS;
}
ze_result_t LinuxPciImp::getMaxLinkWidth(int32_t &maxLinkwidth) {
ze_result_t result;
if (isLmemSupported) {
std::string rootPortPath;
std::string realRootPath;
result = pSysfsAccess->getRealPath(deviceDir, realRootPath);
// we need to change the absolute path to two levels up to get actual
// values of speed and width at the Discrete card's root port.
// the root port is always at a fixed distance as defined in HW
rootPortPath = changeDirNLevelsUp(realRootPath, 2);
if (ZE_RESULT_SUCCESS != result) {
maxLinkwidth = -1;
return result;
}
result = pfsAccess->read(rootPortPath + '/' + "max_link_width", maxLinkwidth);
if (ZE_RESULT_SUCCESS != result) {
maxLinkwidth = -1;
return result;
}
if (maxLinkwidth == static_cast<int32_t>(unknownPcieLinkWidth)) {
maxLinkwidth = -1;
}
} else {
result = pSysfsAccess->read(maxLinkWidthFile, maxLinkwidth);
if (ZE_RESULT_SUCCESS != result) {
return result;
}
if (maxLinkwidth == static_cast<int32_t>(unknownPcieLinkWidth)) {
maxLinkwidth = -1;
}
}
return ZE_RESULT_SUCCESS;
}
void getBarBaseAndSize(std::string readBytes, uint64_t &baseAddr, uint64_t &barSize, uint64_t &barFlags) {
unsigned long long start, end, flags;
std::stringstream sStreamReadBytes;
sStreamReadBytes << readBytes;
sStreamReadBytes >> std::hex >> start;
sStreamReadBytes >> end;
sStreamReadBytes >> flags;
flags &= 0xf;
barFlags = flags;
baseAddr = start;
barSize = end - start + 1;
}
ze_result_t LinuxPciImp::initializeBarProperties(std::vector<zes_pci_bar_properties_t *> &pBarProperties) {
std::vector<std::string> ReadBytes;
ze_result_t result = pSysfsAccess->read(resourceFile, ReadBytes);
if (result != ZE_RESULT_SUCCESS) {
return result;
}
for (uint32_t i = 0; i <= maxPciBars; i++) {
uint64_t baseAddr, barSize, barFlags;
getBarBaseAndSize(ReadBytes[i], baseAddr, barSize, barFlags);
if (baseAddr && !(barFlags & 0x1)) { // we do not update for I/O ports
zes_pci_bar_properties_t *pBarProp = new zes_pci_bar_properties_t;
pBarProp->index = i;
pBarProp->base = baseAddr;
pBarProp->size = barSize;
// Bar Flags Desc.
// Bit-0 - Value 0x0 -> MMIO type BAR
// Bit-0 - Value 0x1 -> I/O type BAR
if (i == 0) { // GRaphics MMIO is at BAR0, and is a 64-bit
pBarProp->type = ZES_PCI_BAR_TYPE_MMIO;
}
if (i == 2) {
pBarProp->type = ZES_PCI_BAR_TYPE_MEM; // device memory is always at BAR2
}
if (i == 6) { // the 7th entry of resource file is expected to be ROM BAR
pBarProp->type = ZES_PCI_BAR_TYPE_ROM;
}
pBarProperties.push_back(pBarProp);
}
}
if (pBarProperties.size() == 0) {
result = ZE_RESULT_ERROR_UNKNOWN;
}
return result;
}
ze_result_t LinuxPciImp::getState(zes_pci_state_t *state) {
return ZE_RESULT_ERROR_UNSUPPORTED_FEATURE;
}
LinuxPciImp::LinuxPciImp(OsSysman *pOsSysman) {
LinuxSysmanImp *pLinuxSysmanImp = static_cast<LinuxSysmanImp *>(pOsSysman);
pSysfsAccess = &pLinuxSysmanImp->getSysfsAccess();
pfsAccess = &pLinuxSysmanImp->getFsAccess();
Device *pDevice = pLinuxSysmanImp->getDeviceHandle();
isLmemSupported = pDevice->getDriverHandle()->getMemoryManager()->isLocalMemorySupported(pDevice->getRootDeviceIndex());
}
OsPci *OsPci::create(OsSysman *pOsSysman) {
LinuxPciImp *pLinuxPciImp = new LinuxPciImp(pOsSysman);
return static_cast<OsPci *>(pLinuxPciImp);
}
} // namespace L0
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