manager.cpp - openbmc/phosphor-led-manager - Gitiles

 #include <iostream>
 #include <string>
 #include <algorithm>
 #include <phosphor-logging/log.hpp>
 #include <sdbusplus/exception.hpp>
 #include <xyz/openbmc_project/Led/Physical/server.hpp>
 #include "manager.hpp"
 namespace phosphor
 {
 namespace led
 {

 // Assert -or- De-assert
 bool Manager::setGroupState(const std::string& path, bool assert,
                             group& ledsAssert, group& ledsDeAssert)
 {
     if (assert)
     {
         assertedGroups.insert(&ledMap.at(path));
     }
     else
     {
         auto search = assertedGroups.find(&ledMap.at(path));
         if (search != assertedGroups.end())
         {
             assertedGroups.erase(&ledMap.at(path));
         }
     }

     // This will contain the union of what's already in the asserted group
     group desiredState {};
     for(const auto& grp : assertedGroups)
     {
         desiredState.insert(grp->cbegin(), grp->cend());
     }

     // Find difference between Combined and Desired to identify
     // which LEDs are getting altered
     group transient {};
     std::set_difference(combinedState.begin(), combinedState.end(),
                         desiredState.begin(), desiredState.end(),
                         std::inserter(transient, transient.begin()),
                         ledComp);
     if(transient.size())
     {
         // Find common LEDs between transient and Desired to know if some LEDs
         // are changing state and not really getting DeAsserted
         group ledsTransient {};
         std::set_intersection(transient.begin(),transient.end(),
                             desiredState.begin(), desiredState.end(),
                             std::inserter(ledsTransient, ledsTransient.begin()),
                             ledLess);

         // Find difference between above 2 to identify those LEDs which are
         // really getting DeAsserted
         std::set_difference(transient.begin(),transient.end(),
                             ledsTransient.begin(),ledsTransient.end(),
                             std::inserter(ledsDeAssert, ledsDeAssert.begin()),
                             ledLess);

         // Remove the elements from Current that are being DeAsserted.
         if(ledsDeAssert.size())
         {
             // Power off LEDs that are to be really DeAsserted
             for (auto& it:ledsDeAssert)
             {
                 // Update LEDs in "physically asserted" set by removing those
                 // LEDs which are De-Asserted
                 auto found = currentState.find(it);
                 if (found != currentState.end())
                 {
                     currentState.erase(found);
                 }
             }
         }
     }

     // Now LEDs that are to be Asserted. These could either be fresh asserts
     // -or- change between [On]<-->[Blink]
     group temp {};
     std::unique_copy(desiredState.begin(), desiredState.end(),
                      std::inserter(temp, temp.begin()),
                      ledEqual);
     if(temp.size())
     {
         // Find difference between [desired to be Asserted] and those LEDs
         // that are physically asserted currently.
         std::set_difference(temp.begin(), temp.end(),
                             currentState.begin(), currentState.end(),
                             std::inserter(ledsAssert, ledsAssert.begin()),
                             ledComp);
     }

     // Update the current actual and desired(the virtual actual)
     currentState = std::move(temp);
     combinedState = std::move(desiredState);

     // If we survive, then set the state accordingly.
     return assert;
 }

 /** @brief Run through the map and apply action on the LEDs */
 void Manager::driveLEDs(group& ledsAssert, group& ledsDeAssert)
 {
     using namespace phosphor::logging;
     // Map of physical LED dbus paths to their Service providers
     populateObjectMap();

     if (phyLeds.empty())
     {
         // Error message is inside the map construction logic.
         return;
     }

     // This order of LED operation is important.
     if (ledsDeAssert.size())
     {
         for (const auto& it: ledsDeAssert)
         {
             std::string objPath = std::string(PHY_LED_PATH) + it.name;
             log<level::DEBUG>("De-Asserting LED", entry("NAME=%s", it.name.c_str()));
             drivePhysicalLED(objPath, Layout::Action::Off, it.dutyOn);
         }
     }

     if(ledsAssert.size())
     {
         for (const auto& it: ledsAssert)
         {
             std::string objPath = std::string(PHY_LED_PATH) + it.name;
             log<level::DEBUG>("Asserting LED", entry("NAME=%s", it.name.c_str()));
             drivePhysicalLED(objPath, it.action, it.dutyOn);
         }
     }
     return;
 }

 // Calls into driving physical LED post choosing the action
 void Manager::drivePhysicalLED(const std::string& objPath,
                                Layout::Action action,
                                uint8_t dutyOn)
 {
     using namespace phosphor::logging;

     auto service = phyLeds.find(objPath);
     if (service == phyLeds.end() || service->second.empty())
     {
         log<level::ERR>("No service providers for physical LED",
                 entry("PATH=%s",objPath.c_str()));
         return;
     }

    // If Blink, set its property
    if (action == Layout::Action::Blink)
    {
        drivePhysicalLED(service->second, objPath, "DutyOn", dutyOn);
    }
    drivePhysicalLED(service->second, objPath, "State",
            getPhysicalAction(action));
    return;
 }

 /** @brief Returns action string based on enum */
 std::string Manager::getPhysicalAction(Layout::Action action)
 {
     namespace server = sdbusplus::xyz::openbmc_project::Led::server;

     // TODO: openbmc/phosphor-led-manager#5
     //    Somehow need to use the generated Action enum than giving one
     //    in ledlayout.
     if(action == Layout::Action::On)
     {
         return server::convertForMessage(server::Physical::Action::On);
     }
     else if(action == Layout::Action::Blink)
     {
         return server::convertForMessage(server::Physical::Action::Blink);
     }
     else
     {
         return server::convertForMessage(server::Physical::Action::Off);
     }
 }

 /** Populates a map with physical LED paths to its service providers */
 void Manager::populateObjectMap()
 {
     using namespace phosphor::logging;

     // Mapper dbus constructs
     constexpr auto MAPPER_BUSNAME   = "xyz.openbmc_project.ObjectMapper";
     constexpr auto MAPPER_OBJ_PATH  = "/xyz/openbmc_project/object_mapper";
     constexpr auto MAPPER_IFACE     = "xyz.openbmc_project.ObjectMapper";

     // Needed to be passed to get the SubTree level
     auto depth = 0;

     // Clean start
     phyLeds.clear();

     // Make a mapper call
     auto mapperCall = bus.new_method_call(MAPPER_BUSNAME, MAPPER_OBJ_PATH,
                                           MAPPER_IFACE, "GetSubTree");
     // Cook rest of the things.
     mapperCall.append(PHY_LED_PATH);
     mapperCall.append(depth);
     mapperCall.append(std::vector<std::string>({PHY_LED_IFACE}));

     auto reply = bus.call(mapperCall);
     if (reply.is_method_error())
     {
         // Its okay if we do not see a corresponding physical LED.
         log<level::INFO>("Error looking up Physical LED services",
                 entry("PATH=%s",PHY_LED_PATH));
         return;
     }

     // Response by mapper in the case of success
     std::map<std::string, std::map<std::string,
              std::vector<std::string>>> objectTree;

     // This is the dict of object paths - service names - interfaces
     try
     {
         reply.read(objectTree);
     }
     catch (const sdbusplus::exception::SdBusError& e)
     {
         log<level::ERR>("Failed to parse Physical LED service lookup",
                         entry("ERROR=%s", e.what()),
                         entry("REPLY_SIG=%s", reply.get_signature()));
         return;
     }
     if (objectTree.empty())
     {
         log<level::INFO>("Physical LED lookup did not return any services",
                 entry("PATH=%s",PHY_LED_PATH));
         return;
     }

     // Now construct our path -> Service name map.
     for (const auto& iter : objectTree)
     {
         phyLeds.emplace(iter.first, iter.second.begin()->first);
     }
     return;
 }

 } // namespace led
 } // namespace phosphor
	#include <iostream>
	#include <string>
	#include <algorithm>
	#include <phosphor-logging/log.hpp>
	#include <sdbusplus/exception.hpp>
	#include <xyz/openbmc_project/Led/Physical/server.hpp>
	#include "manager.hpp"
	namespace phosphor
	{
	namespace led
	{

	// Assert -or- De-assert
	bool Manager::setGroupState(const std::string& path, bool assert,
	group& ledsAssert, group& ledsDeAssert)
	{
	if (assert)
	{
	assertedGroups.insert(&ledMap.at(path));
	}
	else
	{
	auto search = assertedGroups.find(&ledMap.at(path));
	if (search != assertedGroups.end())
	{
	assertedGroups.erase(&ledMap.at(path));
	}
	}

	// This will contain the union of what's already in the asserted group
	group desiredState {};
	for(const auto& grp : assertedGroups)
	{
	desiredState.insert(grp->cbegin(), grp->cend());
	}

	// Find difference between Combined and Desired to identify
	// which LEDs are getting altered
	group transient {};
	std::set_difference(combinedState.begin(), combinedState.end(),
	desiredState.begin(), desiredState.end(),
	std::inserter(transient, transient.begin()),
	ledComp);
	if(transient.size())
	{
	// Find common LEDs between transient and Desired to know if some LEDs
	// are changing state and not really getting DeAsserted
	group ledsTransient {};
	std::set_intersection(transient.begin(),transient.end(),
	desiredState.begin(), desiredState.end(),
	std::inserter(ledsTransient, ledsTransient.begin()),
	ledLess);

	// Find difference between above 2 to identify those LEDs which are
	// really getting DeAsserted
	std::set_difference(transient.begin(),transient.end(),
	ledsTransient.begin(),ledsTransient.end(),
	std::inserter(ledsDeAssert, ledsDeAssert.begin()),
	ledLess);

	// Remove the elements from Current that are being DeAsserted.
	if(ledsDeAssert.size())
	{
	// Power off LEDs that are to be really DeAsserted
	for (auto& it:ledsDeAssert)
	{
	// Update LEDs in "physically asserted" set by removing those
	// LEDs which are De-Asserted
	auto found = currentState.find(it);
	if (found != currentState.end())
	{
	currentState.erase(found);
	}
	}
	}
	}

	// Now LEDs that are to be Asserted. These could either be fresh asserts
	// -or- change between [On]<-->[Blink]
	group temp {};
	std::unique_copy(desiredState.begin(), desiredState.end(),
	std::inserter(temp, temp.begin()),
	ledEqual);
	if(temp.size())
	{
	// Find difference between [desired to be Asserted] and those LEDs
	// that are physically asserted currently.
	std::set_difference(temp.begin(), temp.end(),
	currentState.begin(), currentState.end(),
	std::inserter(ledsAssert, ledsAssert.begin()),
	ledComp);
	}

	// Update the current actual and desired(the virtual actual)
	currentState = std::move(temp);
	combinedState = std::move(desiredState);

	// If we survive, then set the state accordingly.
	return assert;
	}

	/** @brief Run through the map and apply action on the LEDs */
	void Manager::driveLEDs(group& ledsAssert, group& ledsDeAssert)
	{
	using namespace phosphor::logging;
	// Map of physical LED dbus paths to their Service providers
	populateObjectMap();

	if (phyLeds.empty())
	{
	// Error message is inside the map construction logic.
	return;
	}

	// This order of LED operation is important.
	if (ledsDeAssert.size())
	{
	for (const auto& it: ledsDeAssert)
	{
	std::string objPath = std::string(PHY_LED_PATH) + it.name;
	log<level::DEBUG>("De-Asserting LED", entry("NAME=%s", it.name.c_str()));
	drivePhysicalLED(objPath, Layout::Action::Off, it.dutyOn);
	}
	}

	if(ledsAssert.size())
	{
	for (const auto& it: ledsAssert)
	{
	std::string objPath = std::string(PHY_LED_PATH) + it.name;
	log<level::DEBUG>("Asserting LED", entry("NAME=%s", it.name.c_str()));
	drivePhysicalLED(objPath, it.action, it.dutyOn);
	}
	}
	return;
	}

	// Calls into driving physical LED post choosing the action
	void Manager::drivePhysicalLED(const std::string& objPath,
	Layout::Action action,
	uint8_t dutyOn)
	{
	using namespace phosphor::logging;

	auto service = phyLeds.find(objPath);
	if (service == phyLeds.end() \|\| service->second.empty())
	{
	log<level::ERR>("No service providers for physical LED",
	entry("PATH=%s",objPath.c_str()));
	return;
	}

	// If Blink, set its property
	if (action == Layout::Action::Blink)
	{
	drivePhysicalLED(service->second, objPath, "DutyOn", dutyOn);
	}
	drivePhysicalLED(service->second, objPath, "State",
	getPhysicalAction(action));
	return;
	}

	/** @brief Returns action string based on enum */
	std::string Manager::getPhysicalAction(Layout::Action action)
	{
	namespace server = sdbusplus::xyz::openbmc_project::Led::server;

	// TODO: openbmc/phosphor-led-manager#5
	// Somehow need to use the generated Action enum than giving one
	// in ledlayout.
	if(action == Layout::Action::On)
	{
	return server::convertForMessage(server::Physical::Action::On);
	}
	else if(action == Layout::Action::Blink)
	{
	return server::convertForMessage(server::Physical::Action::Blink);
	}
	else
	{
	return server::convertForMessage(server::Physical::Action::Off);
	}
	}

	/** Populates a map with physical LED paths to its service providers */
	void Manager::populateObjectMap()
	{
	using namespace phosphor::logging;

	// Mapper dbus constructs
	constexpr auto MAPPER_BUSNAME = "xyz.openbmc_project.ObjectMapper";
	constexpr auto MAPPER_OBJ_PATH = "/xyz/openbmc_project/object_mapper";
	constexpr auto MAPPER_IFACE = "xyz.openbmc_project.ObjectMapper";

	// Needed to be passed to get the SubTree level
	auto depth = 0;

	// Clean start
	phyLeds.clear();

	// Make a mapper call
	auto mapperCall = bus.new_method_call(MAPPER_BUSNAME, MAPPER_OBJ_PATH,
	MAPPER_IFACE, "GetSubTree");
	// Cook rest of the things.
	mapperCall.append(PHY_LED_PATH);
	mapperCall.append(depth);
	mapperCall.append(std::vector<std::string>({PHY_LED_IFACE}));

	auto reply = bus.call(mapperCall);
	if (reply.is_method_error())
	{
	// Its okay if we do not see a corresponding physical LED.
	log<level::INFO>("Error looking up Physical LED services",
	entry("PATH=%s",PHY_LED_PATH));
	return;
	}

	// Response by mapper in the case of success
	std::map<std::string, std::map<std::string,
	std::vector<std::string>>> objectTree;

	// This is the dict of object paths - service names - interfaces
	try
	{
	reply.read(objectTree);
	}
	catch (const sdbusplus::exception::SdBusError& e)
	{
	log<level::ERR>("Failed to parse Physical LED service lookup",
	entry("ERROR=%s", e.what()),
	entry("REPLY_SIG=%s", reply.get_signature()));
	return;
	}
	if (objectTree.empty())
	{
	log<level::INFO>("Physical LED lookup did not return any services",
	entry("PATH=%s",PHY_LED_PATH));
	return;
	}

	// Now construct our path -> Service name map.
	for (const auto& iter : objectTree)
	{
	phyLeds.emplace(iter.first, iter.second.begin()->first);
	}
	return;
	}

	} // namespace led
	} // namespace phosphor