tools/power-utils/updater.cpp - openbmc/phosphor-power - Gitiles

 /**
  * Copyright © 2019 IBM Corporation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 #include "config.h"

 #include "updater.hpp"

 #include "pmbus.hpp"
 #include "types.hpp"
 #include "utility.hpp"

 #include <phosphor-logging/log.hpp>

 #include <chrono>
 #include <fstream>
 #include <thread>

 using namespace phosphor::logging;
 namespace util = phosphor::power::util;

 namespace updater
 {

 namespace internal
 {

 /* Get the device name from the device path */
 std::string getDeviceName(std::string devPath)
 {
     if (devPath.back() == '/')
     {
         devPath.pop_back();
     }
     return fs::path(devPath).stem().string();
 }

 std::string getDevicePath(const std::string& psuInventoryPath)
 {
     auto data = util::loadJSONFromFile(PSU_JSON_PATH);

     if (data == nullptr)
     {
         return {};
     }

     auto devicePath = data["psuDevices"][psuInventoryPath];
     if (devicePath.empty())
     {
         log<level::WARNING>("Unable to find psu devices or path");
     }
     return devicePath;
 }

 std::pair<uint8_t, uint8_t> parseDeviceName(const std::string& devName)
 {
     // Get I2C bus id and device address, e.g. 3-0068
     // is parsed to bus id 3, device address 0x68
     auto pos = devName.find('-');
     assert(pos != std::string::npos);
     uint8_t busId = std::stoi(devName.substr(0, pos));
     uint8_t devAddr = std::stoi(devName.substr(pos + 1), nullptr, 16);
     return {busId, devAddr};
 }

 } // namespace internal

 bool update(const std::string& psuInventoryPath, const std::string& imageDir)
 {
     auto devPath = internal::getDevicePath(psuInventoryPath);
     if (devPath.empty())
     {
         return false;
     }

     Updater updater(psuInventoryPath, devPath, imageDir);
     if (!updater.isReadyToUpdate())
     {
         log<level::ERR>("PSU not ready to update",
                         entry("PSU=%s", psuInventoryPath.c_str()));
         return false;
     }

     updater.bindUnbind(false);
     updater.createI2CDevice();
     int ret = updater.doUpdate();
     updater.bindUnbind(true);
     return ret == 0;
 }

 Updater::Updater(const std::string& psuInventoryPath,
                  const std::string& devPath, const std::string& imageDir) :
     bus(sdbusplus::bus::new_default()),
     psuInventoryPath(psuInventoryPath), devPath(devPath),
     devName(internal::getDeviceName(devPath)), imageDir(imageDir)
 {
     fs::path p = fs::path(devPath) / "driver";
     try
     {
         driverPath =
             fs::canonical(p); // Get the path that points to the driver dir
     }
     catch (const fs::filesystem_error& e)
     {
         log<level::ERR>("Failed to get canonical path",
                         entry("DEVPATH=%s", devPath.c_str()),
                         entry("ERROR=%s", e.what()));
         throw;
     }
 }

 // During PSU update, it needs to access the PSU i2c device directly, so it
 // needs to unbind the driver during the update, and re-bind after it's done.
 // After unbind, the hwmon sysfs will be gone, and the psu-monitor will report
 // errors. So set the PSU inventory's Present property to false so that
 // psu-monitor will not report any errors.
 void Updater::bindUnbind(bool doBind)
 {
     if (!doBind)
     {
         // Set non-present before unbind the driver
         setPresent(doBind);
     }
     auto p = driverPath;
     p /= doBind ? "bind" : "unbind";
     std::ofstream out(p.string());
     out << devName;

     if (doBind)
     {
         // Set to present after bind the driver
         setPresent(doBind);
     }
 }

 void Updater::setPresent(bool present)
 {
     try
     {
         auto service = util::getService(psuInventoryPath, INVENTORY_IFACE, bus);
         util::setProperty(INVENTORY_IFACE, PRESENT_PROP, psuInventoryPath,
                           service, bus, present);
     }
     catch (const std::exception& e)
     {
         log<level::ERR>("Failed to set present property",
                         entry("PSU=%s", psuInventoryPath.c_str()),
                         entry("PRESENT=%d", present));
     }
 }

 bool Updater::isReadyToUpdate()
 {
     using namespace phosphor::pmbus;

     // Pre-condition for updating PSU:
     // * Host is powered off
     // * At least one other PSU is present
     // * All other PSUs that are present are having AC input and DC standby
     //   output

     if (util::isPoweredOn(bus, true))
     {
         log<level::WARNING>("Unable to update PSU when host is on");
         return false;
     }

     bool hasOtherPresent = false;
     auto paths = util::getPSUInventoryPaths(bus);
     for (const auto& p : paths)
     {
         if (p == psuInventoryPath)
         {
             // Skip check for itself
             continue;
         }

         // Check PSU present
         bool present = false;
         try
         {
             auto service = util::getService(p, INVENTORY_IFACE, bus);
             util::getProperty(INVENTORY_IFACE, PRESENT_PROP, psuInventoryPath,
                               service, bus, present);
         }
         catch (const std::exception& e)
         {
             log<level::ERR>("Failed to get present property",
                             entry("PSU=%s", p.c_str()));
         }
         if (!present)
         {
             log<level::WARNING>("PSU not present", entry("PSU=%s", p.c_str()));
             continue;
         }
         hasOtherPresent = true;

         // Typically the driver is still bound here, so it is possible to
         // directly read the debugfs to get the status.
         try
         {
             auto path = internal::getDevicePath(p);
             PMBus pmbus(path);
             uint16_t statusWord = pmbus.read(STATUS_WORD, Type::Debug);
             auto status0Vout = pmbus.insertPageNum(STATUS_VOUT, 0);
             uint8_t voutStatus = pmbus.read(status0Vout, Type::Debug);
             if ((statusWord & status_word::VOUT_FAULT) ||
                 (statusWord & status_word::INPUT_FAULT_WARN) ||
                 (statusWord & status_word::VIN_UV_FAULT) ||
                 // For ibm-cffps PSUs, the MFR (0x80)'s OV (bit 2) and VAUX
                 // (bit 6) fault map to OV_FAULT, and UV (bit 3) fault maps to
                 // UV_FAULT in vout status.
                 (voutStatus & status_vout::UV_FAULT) ||
                 (voutStatus & status_vout::OV_FAULT))
             {
                 log<level::WARNING>(
                     "Unable to update PSU when other PSU has input/ouput fault",
                     entry("PSU=%s", p.c_str()),
                     entry("STATUS_WORD=0x%04x", statusWord),
                     entry("VOUT_BYTE=0x%02x", voutStatus));
                 return false;
             }
         }
         catch (const std::exception& ex)
         {
             // If error occurs on accessing the debugfs, it means something went
             // wrong, e.g. PSU is not present, and it's not ready to update.
             log<level::ERR>(ex.what());
             return false;
         }
     }
     return hasOtherPresent;
 }

 int Updater::doUpdate()
 {
     using namespace std::chrono;

     uint8_t data;
     uint8_t unlockData[12] = {0x45, 0x43, 0x44, 0x31, 0x36, 0x30,
                               0x33, 0x30, 0x30, 0x30, 0x34, 0x01};
     uint8_t bootFlag = 0x01;
     static_assert(sizeof(unlockData) == 12);

     i2c->write(0xf0, sizeof(unlockData), unlockData);
     printf("Unlock PSU\n");

     std::this_thread::sleep_for(milliseconds(5));

     i2c->write(0xf1, bootFlag);
     printf("Set boot flag ret\n");

     std::this_thread::sleep_for(seconds(3));

     i2c->read(0xf1, data);
     printf("Read of 0x%02x, 0x%02x\n", 0xf1, data);
     return 0;
 }

 void Updater::createI2CDevice()
 {
     auto [id, addr] = internal::parseDeviceName(devName);
     i2c = i2c::create(id, addr);
 }

 } // namespace updater
	/**
	* Copyright © 2019 IBM Corporation
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/
	#include "config.h"

	#include "updater.hpp"

	#include "pmbus.hpp"
	#include "types.hpp"
	#include "utility.hpp"

	#include <phosphor-logging/log.hpp>

	#include <chrono>
	#include <fstream>
	#include <thread>

	using namespace phosphor::logging;
	namespace util = phosphor::power::util;

	namespace updater
	{

	namespace internal
	{

	/* Get the device name from the device path */
	std::string getDeviceName(std::string devPath)
	{
	if (devPath.back() == '/')
	{
	devPath.pop_back();
	}
	return fs::path(devPath).stem().string();
	}

	std::string getDevicePath(const std::string& psuInventoryPath)
	{
	auto data = util::loadJSONFromFile(PSU_JSON_PATH);

	if (data == nullptr)
	{
	return {};
	}

	auto devicePath = data["psuDevices"][psuInventoryPath];
	if (devicePath.empty())
	{
	log<level::WARNING>("Unable to find psu devices or path");
	}
	return devicePath;
	}

	std::pair<uint8_t, uint8_t> parseDeviceName(const std::string& devName)
	{
	// Get I2C bus id and device address, e.g. 3-0068
	// is parsed to bus id 3, device address 0x68
	auto pos = devName.find('-');
	assert(pos != std::string::npos);
	uint8_t busId = std::stoi(devName.substr(0, pos));
	uint8_t devAddr = std::stoi(devName.substr(pos + 1), nullptr, 16);
	return {busId, devAddr};
	}

	} // namespace internal

	bool update(const std::string& psuInventoryPath, const std::string& imageDir)
	{
	auto devPath = internal::getDevicePath(psuInventoryPath);
	if (devPath.empty())
	{
	return false;
	}

	Updater updater(psuInventoryPath, devPath, imageDir);
	if (!updater.isReadyToUpdate())
	{
	log<level::ERR>("PSU not ready to update",
	entry("PSU=%s", psuInventoryPath.c_str()));
	return false;
	}

	updater.bindUnbind(false);
	updater.createI2CDevice();
	int ret = updater.doUpdate();
	updater.bindUnbind(true);
	return ret == 0;
	}

	Updater::Updater(const std::string& psuInventoryPath,
	const std::string& devPath, const std::string& imageDir) :
	bus(sdbusplus::bus::new_default()),
	psuInventoryPath(psuInventoryPath), devPath(devPath),
	devName(internal::getDeviceName(devPath)), imageDir(imageDir)
	{
	fs::path p = fs::path(devPath) / "driver";
	try
	{
	driverPath =
	fs::canonical(p); // Get the path that points to the driver dir
	}
	catch (const fs::filesystem_error& e)
	{
	log<level::ERR>("Failed to get canonical path",
	entry("DEVPATH=%s", devPath.c_str()),
	entry("ERROR=%s", e.what()));
	throw;
	}
	}

	// During PSU update, it needs to access the PSU i2c device directly, so it
	// needs to unbind the driver during the update, and re-bind after it's done.
	// After unbind, the hwmon sysfs will be gone, and the psu-monitor will report
	// errors. So set the PSU inventory's Present property to false so that
	// psu-monitor will not report any errors.
	void Updater::bindUnbind(bool doBind)
	{
	if (!doBind)
	{
	// Set non-present before unbind the driver
	setPresent(doBind);
	}
	auto p = driverPath;
	p /= doBind ? "bind" : "unbind";
	std::ofstream out(p.string());
	out << devName;

	if (doBind)
	{
	// Set to present after bind the driver
	setPresent(doBind);
	}
	}

	void Updater::setPresent(bool present)
	{
	try
	{
	auto service = util::getService(psuInventoryPath, INVENTORY_IFACE, bus);
	util::setProperty(INVENTORY_IFACE, PRESENT_PROP, psuInventoryPath,
	service, bus, present);
	}
	catch (const std::exception& e)
	{
	log<level::ERR>("Failed to set present property",
	entry("PSU=%s", psuInventoryPath.c_str()),
	entry("PRESENT=%d", present));
	}
	}

	bool Updater::isReadyToUpdate()
	{
	using namespace phosphor::pmbus;

	// Pre-condition for updating PSU:
	// * Host is powered off
	// * At least one other PSU is present
	// * All other PSUs that are present are having AC input and DC standby
	// output

	if (util::isPoweredOn(bus, true))
	{
	log<level::WARNING>("Unable to update PSU when host is on");
	return false;
	}

	bool hasOtherPresent = false;
	auto paths = util::getPSUInventoryPaths(bus);
	for (const auto& p : paths)
	{
	if (p == psuInventoryPath)
	{
	// Skip check for itself
	continue;
	}

	// Check PSU present
	bool present = false;
	try
	{
	auto service = util::getService(p, INVENTORY_IFACE, bus);
	util::getProperty(INVENTORY_IFACE, PRESENT_PROP, psuInventoryPath,
	service, bus, present);
	}
	catch (const std::exception& e)
	{
	log<level::ERR>("Failed to get present property",
	entry("PSU=%s", p.c_str()));
	}
	if (!present)
	{
	log<level::WARNING>("PSU not present", entry("PSU=%s", p.c_str()));
	continue;
	}
	hasOtherPresent = true;

	// Typically the driver is still bound here, so it is possible to
	// directly read the debugfs to get the status.
	try
	{
	auto path = internal::getDevicePath(p);
	PMBus pmbus(path);
	uint16_t statusWord = pmbus.read(STATUS_WORD, Type::Debug);
	auto status0Vout = pmbus.insertPageNum(STATUS_VOUT, 0);
	uint8_t voutStatus = pmbus.read(status0Vout, Type::Debug);
	if ((statusWord & status_word::VOUT_FAULT) \|\|
	(statusWord & status_word::INPUT_FAULT_WARN) \|\|
	(statusWord & status_word::VIN_UV_FAULT) \|\|
	// For ibm-cffps PSUs, the MFR (0x80)'s OV (bit 2) and VAUX
	// (bit 6) fault map to OV_FAULT, and UV (bit 3) fault maps to
	// UV_FAULT in vout status.
	(voutStatus & status_vout::UV_FAULT) \|\|
	(voutStatus & status_vout::OV_FAULT))
	{
	log<level::WARNING>(
	"Unable to update PSU when other PSU has input/ouput fault",
	entry("PSU=%s", p.c_str()),
	entry("STATUS_WORD=0x%04x", statusWord),
	entry("VOUT_BYTE=0x%02x", voutStatus));
	return false;
	}
	}
	catch (const std::exception& ex)
	{
	// If error occurs on accessing the debugfs, it means something went
	// wrong, e.g. PSU is not present, and it's not ready to update.
	log<level::ERR>(ex.what());
	return false;
	}
	}
	return hasOtherPresent;
	}

	int Updater::doUpdate()
	{
	using namespace std::chrono;

	uint8_t data;
	uint8_t unlockData[12] = {0x45, 0x43, 0x44, 0x31, 0x36, 0x30,
	0x33, 0x30, 0x30, 0x30, 0x34, 0x01};
	uint8_t bootFlag = 0x01;
	static_assert(sizeof(unlockData) == 12);

	i2c->write(0xf0, sizeof(unlockData), unlockData);
	printf("Unlock PSU\n");

	std::this_thread::sleep_for(milliseconds(5));

	i2c->write(0xf1, bootFlag);
	printf("Set boot flag ret\n");

	std::this_thread::sleep_for(seconds(3));

	i2c->read(0xf1, data);
	printf("Read of 0x%02x, 0x%02x\n", 0xf1, data);
	return 0;
	}

	void Updater::createI2CDevice()
	{
	auto [id, addr] = internal::parseDeviceName(devName);
	i2c = i2c::create(id, addr);
	}

	} // namespace updater