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/*
* Copyright (C) 2022-2024 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#include "shared/source/debug_settings/debug_settings_manager.h"
#include "shared/source/execution_environment/execution_environment.h"
#include "shared/source/execution_environment/root_device_environment.h"
#include "shared/source/os_interface/linux/drm_memory_operations_handler.h"
#include "shared/source/os_interface/linux/file_descriptor.h"
#include "shared/source/utilities/directory.h"
#include <fcntl.h>
#include <unistd.h>
namespace NEO {
void ExecutionEnvironment::adjustRootDeviceEnvironments() {
for (auto rootDeviceIndex = 0u; rootDeviceIndex < rootDeviceEnvironments.size(); rootDeviceIndex++) {
auto drmMemoryOperationsHandler = static_cast<DrmMemoryOperationsHandler *>(rootDeviceEnvironments[rootDeviceIndex]->memoryOperationsInterface.get());
drmMemoryOperationsHandler->setRootDeviceIndex(rootDeviceIndex);
}
}
void ExecutionEnvironment::configureCcsMode() {
const auto &ccsString = debugManager.flags.ZEX_NUMBER_OF_CCS.get();
if (ccsString.compare("default") == 0 ||
ccsString.empty()) {
return;
}
char *endPtr = nullptr;
uint32_t ccsMode = static_cast<uint32_t>(std::strtoul(ccsString.c_str(), &endPtr, 10));
if (endPtr == ccsString.c_str()) {
return;
}
const std::string drmPath = "/sys/class/drm";
std::string expectedFilePrefix = drmPath + "/card";
auto files = Directory::getFiles(drmPath.c_str());
for (const auto &file : files) {
if (file.find(expectedFilePrefix.c_str()) == std::string::npos) {
continue;
}
std::string gtPath = file + "/gt";
auto gtFiles = Directory::getFiles(gtPath.c_str());
expectedFilePrefix = gtPath + "/gt";
for (const auto >File : gtFiles) {
if (gtFile.find(expectedFilePrefix.c_str()) == std::string::npos) {
continue;
}
std::string ccsFile = gtFile + "/ccs_mode";
auto fd = FileDescriptor(ccsFile.c_str(), O_RDWR);
if (fd < 0) {
if ((errno == -EACCES) || (errno == -EPERM)) {
fprintf(stderr, "No read and write permissions for %s, System administrator needs to grant permissions to allow modification of this file from user space\n", ccsFile.c_str());
fprintf(stdout, "No read and write permissions for %s, System administrator needs to grant permissions to allow modification of this file from user space\n", ccsFile.c_str());
}
continue;
}
uint32_t ccsValue = 0;
ssize_t ret = SysCalls::read(fd, &ccsValue, sizeof(uint32_t));
PRINT_DEBUG_STRING(debugManager.flags.PrintDebugMessages.get() && (ret < 0), stderr, "read() on %s failed errno = %d | ret = %d \n",
ccsFile.c_str(), errno, ret);
if ((ret < 0) || (ccsValue == ccsMode)) {
continue;
}
do {
ret = SysCalls::write(fd, &ccsMode, sizeof(uint32_t));
} while (ret == -1 && errno == -EBUSY);
if (ret > 0) {
deviceCcsModeVec.emplace_back(ccsFile, ccsValue);
}
}
}
}
void ExecutionEnvironment::restoreCcsMode() {
for (auto &[ccsFile, ccsMode] : deviceCcsModeVec) {
auto fd = FileDescriptor(ccsFile.c_str(), O_WRONLY);
DEBUG_BREAK_IF(fd < 0);
if (fd > 0) {
[[maybe_unused]] auto ret = SysCalls::write(fd, &ccsMode, sizeof(uint32_t));
DEBUG_BREAK_IF(ret < 0);
}
}
deviceCcsModeVec.clear();
}
} // namespace NEO
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