dcmihandler.cpp - openbmc/phosphor-host-ipmid - Gitiles

 #include "dcmihandler.hpp"
 #include "host-ipmid/ipmid-api.h"
 #include <phosphor-logging/elog-errors.hpp>
 #include <phosphor-logging/log.hpp>
 #include <sdbusplus/bus.hpp>
 #include "utils.hpp"
 #include <stdio.h>
 #include <string.h>
 #include <stdint.h>
 #include "xyz/openbmc_project/Common/error.hpp"

 using namespace phosphor::logging;
 using InternalFailure =
         sdbusplus::xyz::openbmc_project::Common::Error::InternalFailure;

 void register_netfn_dcmi_functions() __attribute__((constructor));

 constexpr auto PCAP_PATH    = "/xyz/openbmc_project/control/host0/power_cap";
 constexpr auto PCAP_INTERFACE = "xyz.openbmc_project.Control.Power.Cap";

 constexpr auto POWER_CAP_PROP = "PowerCap";
 constexpr auto POWER_CAP_ENABLE_PROP = "PowerCapEnable";

 using namespace phosphor::logging;

 namespace dcmi
 {

 uint32_t getPcap(sdbusplus::bus::bus& bus)
 {
     auto settingService = ipmi::getService(bus,
                                            PCAP_INTERFACE,PCAP_PATH);

     auto method = bus.new_method_call(settingService.c_str(),
                                       PCAP_PATH,
                                       "org.freedesktop.DBus.Properties",
                                       "Get");

     method.append(PCAP_INTERFACE, POWER_CAP_PROP);
     auto reply = bus.call(method);

     if (reply.is_method_error())
     {
         log<level::ERR>("Error in getPcap prop");
         elog<InternalFailure>();
     }
     sdbusplus::message::variant<uint32_t> pcap;
     reply.read(pcap);

     return pcap.get<uint32_t>();
 }

 bool getPcapEnabled(sdbusplus::bus::bus& bus)
 {
     auto settingService = ipmi::getService(bus,
                                            PCAP_INTERFACE,PCAP_PATH);

     auto method = bus.new_method_call(settingService.c_str(),
                                       PCAP_PATH,
                                       "org.freedesktop.DBus.Properties",
                                       "Get");

     method.append(PCAP_INTERFACE, POWER_CAP_ENABLE_PROP);
     auto reply = bus.call(method);

     if (reply.is_method_error())
     {
         log<level::ERR>("Error in getPcapEnabled prop");
         elog<InternalFailure>();
     }
     sdbusplus::message::variant<bool> pcapEnabled;
     reply.read(pcapEnabled);

     return pcapEnabled.get<bool>();
 }

 void setPcap(sdbusplus::bus::bus& bus, const uint32_t powerCap)
 {
     auto service = ipmi::getService(bus, PCAP_INTERFACE, PCAP_PATH);

     auto method = bus.new_method_call(service.c_str(),
                                       PCAP_PATH,
                                       "org.freedesktop.DBus.Properties",
                                       "Set");

     method.append(PCAP_INTERFACE, POWER_CAP_PROP);
     method.append(sdbusplus::message::variant<uint32_t>(powerCap));

     auto reply = bus.call(method);

     if (reply.is_method_error())
     {
         log<level::ERR>("Error in setPcap property");
         elog<InternalFailure>();
     }
 }

 void setPcapEnable(sdbusplus::bus::bus& bus, bool enabled)
 {
     auto service = ipmi::getService(bus, PCAP_INTERFACE, PCAP_PATH);

     auto method = bus.new_method_call(service.c_str(),
                                       PCAP_PATH,
                                       "org.freedesktop.DBus.Properties",
                                       "Set");

     method.append(PCAP_INTERFACE, POWER_CAP_ENABLE_PROP);
     method.append(sdbusplus::message::variant<bool>(enabled));

     auto reply = bus.call(method);

     if (reply.is_method_error())
     {
         log<level::ERR>("Error in setPcapEnabled property");
         elog<InternalFailure>();
     }
 }

 void readAssetTagObjectTree(dcmi::assettag::ObjectTree& objectTree)
 {
     static constexpr auto mapperBusName = "xyz.openbmc_project.ObjectMapper";
     static constexpr auto mapperObjPath = "/xyz/openbmc_project/object_mapper";
     static constexpr auto mapperIface = "xyz.openbmc_project.ObjectMapper";
     static constexpr auto inventoryRoot = "/xyz/openbmc_project/inventory/";

     sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
     auto depth = 0;

     auto mapperCall = bus.new_method_call(mapperBusName,
                                           mapperObjPath,
                                           mapperIface,
                                           "GetSubTree");

     mapperCall.append(inventoryRoot);
     mapperCall.append(depth);
     mapperCall.append(std::vector<std::string>({dcmi::assetTagIntf}));

     auto mapperReply = bus.call(mapperCall);
     if (mapperReply.is_method_error())
     {
         log<level::ERR>("Error in mapper call");
         elog<InternalFailure>();
     }

     mapperReply.read(objectTree);

     if (objectTree.empty())
     {
         log<level::ERR>("AssetTag property is not populated");
         elog<InternalFailure>();
     }
 }

 std::string readAssetTag()
 {
     sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
     dcmi::assettag::ObjectTree objectTree;

     // Read the object tree with the inventory root to figure out the object
     // that has implemented the Asset tag interface.
     readAssetTagObjectTree(objectTree);

     auto method = bus.new_method_call(
             (objectTree.begin()->second.begin()->first).c_str(),
             (objectTree.begin()->first).c_str(),
             dcmi::propIntf,
             "Get");
     method.append(dcmi::assetTagIntf);
     method.append(dcmi::assetTagProp);

     auto reply = bus.call(method);
     if (reply.is_method_error())
     {
         log<level::ERR>("Error in reading asset tag");
         elog<InternalFailure>();
     }

     sdbusplus::message::variant<std::string> assetTag;
     reply.read(assetTag);

     return assetTag.get<std::string>();
 }

 void writeAssetTag(const std::string& assetTag)
 {
     sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
     dcmi::assettag::ObjectTree objectTree;

     // Read the object tree with the inventory root to figure out the object
     // that has implemented the Asset tag interface.
     readAssetTagObjectTree(objectTree);

     auto method = bus.new_method_call(
             (objectTree.begin()->second.begin()->first).c_str(),
             (objectTree.begin()->first).c_str(),
             dcmi::propIntf,
             "Set");
     method.append(dcmi::assetTagIntf);
     method.append(dcmi::assetTagProp);
     method.append(sdbusplus::message::variant<std::string>(assetTag));

     auto reply = bus.call(method);
     if (reply.is_method_error())
     {
         log<level::ERR>("Error in writing asset tag");
         elog<InternalFailure>();
     }
 }

 } // namespace dcmi

 ipmi_ret_t getPowerLimit(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                          ipmi_request_t request, ipmi_response_t response,
                          ipmi_data_len_t data_len, ipmi_context_t context)
 {
     auto requestData = reinterpret_cast<const dcmi::GetPowerLimitRequest*>
                    (request);
     std::vector<uint8_t> outPayload(sizeof(dcmi::GetPowerLimitResponse));
     auto responseData = reinterpret_cast<dcmi::GetPowerLimitResponse*>
             (outPayload.data());

     if (requestData->groupID != dcmi::groupExtId)
     {
         *data_len = 0;
         return IPMI_CC_INVALID_FIELD_REQUEST;
     }

     sdbusplus::bus::bus sdbus {ipmid_get_sd_bus_connection()};
     uint32_t pcapValue = 0;
     bool pcapEnable = false;

     try
     {
         pcapValue = dcmi::getPcap(sdbus);
         pcapEnable = dcmi::getPcapEnabled(sdbus);
     }
     catch (InternalFailure& e)
     {
         *data_len = 0;
         return IPMI_CC_UNSPECIFIED_ERROR;
     }

     responseData->groupID = dcmi::groupExtId;

     /*
      * Exception action if power limit is exceeded and cannot be controlled
      * with the correction time limit is hardcoded to Hard Power Off system
      * and log event to SEL.
      */
     constexpr auto exception = 0x01;
     responseData->exceptionAction = exception;

     responseData->powerLimit = static_cast<uint16_t>(pcapValue);

     /*
      * Correction time limit and Statistics sampling period is currently not
      * populated.
      */

     *data_len = outPayload.size();
     memcpy(response, outPayload.data(), *data_len);

     if (pcapEnable)
     {
         return IPMI_CC_OK;
     }
     else
     {
         return IPMI_DCMI_CC_NO_ACTIVE_POWER_LIMIT;
     }
 }

 ipmi_ret_t setPowerLimit(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                          ipmi_request_t request, ipmi_response_t response,
                          ipmi_data_len_t data_len, ipmi_context_t context)
 {
     auto requestData = reinterpret_cast<const dcmi::SetPowerLimitRequest*>
                    (request);
     std::vector<uint8_t> outPayload(sizeof(dcmi::SetPowerLimitResponse));
     auto responseData = reinterpret_cast<dcmi::SetPowerLimitResponse*>
             (outPayload.data());

     if (requestData->groupID != dcmi::groupExtId)
     {
         *data_len = 0;
         return IPMI_CC_INVALID_FIELD_REQUEST;
     }

     sdbusplus::bus::bus sdbus {ipmid_get_sd_bus_connection()};

     // Only process the power limit requested in watts.
     try
     {
         dcmi::setPcap(sdbus, requestData->powerLimit);
     }
     catch (InternalFailure& e)
     {
         *data_len = 0;
         return IPMI_CC_UNSPECIFIED_ERROR;
     }

     log<level::INFO>("Set Power Cap",
                      entry("POWERCAP=%u", requestData->powerLimit));

     responseData->groupID = dcmi::groupExtId;
     memcpy(response, outPayload.data(), outPayload.size());
     *data_len = outPayload.size();

     return IPMI_CC_OK;
 }

 ipmi_ret_t applyPowerLimit(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                            ipmi_request_t request, ipmi_response_t response,
                            ipmi_data_len_t data_len, ipmi_context_t context)
 {
     auto requestData = reinterpret_cast<const dcmi::ApplyPowerLimitRequest*>
                    (request);
     std::vector<uint8_t> outPayload(sizeof(dcmi::ApplyPowerLimitResponse));
     auto responseData = reinterpret_cast<dcmi::ApplyPowerLimitResponse*>
             (outPayload.data());

     if (requestData->groupID != dcmi::groupExtId)
     {
         *data_len = 0;
         return IPMI_CC_INVALID_FIELD_REQUEST;
     }

     sdbusplus::bus::bus sdbus {ipmid_get_sd_bus_connection()};

     try
     {
         dcmi::setPcapEnable(sdbus,
                             static_cast<bool>(requestData->powerLimitAction));
     }
     catch (InternalFailure& e)
     {
         *data_len = 0;
         return IPMI_CC_UNSPECIFIED_ERROR;
     }

     log<level::INFO>("Set Power Cap Enable",
                      entry("POWERCAPENABLE=%u", requestData->powerLimitAction));

     responseData->groupID = dcmi::groupExtId;
     memcpy(response, outPayload.data(), outPayload.size());
     *data_len = outPayload.size();

     return IPMI_CC_OK;
 }

 ipmi_ret_t getAssetTag(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                        ipmi_request_t request, ipmi_response_t response,
                        ipmi_data_len_t data_len, ipmi_context_t context)
 {
     auto requestData = reinterpret_cast<const dcmi::GetAssetTagRequest*>
                    (request);
     std::vector<uint8_t> outPayload(sizeof(dcmi::GetAssetTagResponse));
     auto responseData = reinterpret_cast<dcmi::GetAssetTagResponse*>
             (outPayload.data());

     if (requestData->groupID != dcmi::groupExtId)
     {
         *data_len = 0;
         return IPMI_CC_INVALID_FIELD_REQUEST;
     }

     // Verify offset to read and number of bytes to read are not exceeding the
     // range.
     if ((requestData->offset > dcmi::assetTagMaxOffset) ||
         (requestData->bytes > dcmi::maxBytes) ||
         ((requestData->offset + requestData->bytes) > dcmi::assetTagMaxSize))
     {
         *data_len = 0;
         return IPMI_CC_PARM_OUT_OF_RANGE;
     }

     std::string assetTag;

     try
     {
         assetTag = dcmi::readAssetTag();
     }
     catch (InternalFailure& e)
     {
         *data_len = 0;
         return IPMI_CC_UNSPECIFIED_ERROR;
     }

     responseData->groupID = dcmi::groupExtId;

     // Return if the asset tag is not populated.
     if (!assetTag.size())
     {
         responseData->tagLength = 0;
         memcpy(response, outPayload.data(), outPayload.size());
         *data_len = outPayload.size();
         return IPMI_CC_OK;
     }

     // If the asset tag is longer than 63 bytes, restrict it to 63 bytes to suit
     // Get Asset Tag command.
     if (assetTag.size() > dcmi::assetTagMaxSize)
     {
         assetTag.resize(dcmi::assetTagMaxSize);
     }

     // If the requested offset is beyond the asset tag size.
     if (requestData->offset >= assetTag.size())
     {
         *data_len = 0;
         return IPMI_CC_PARM_OUT_OF_RANGE;
     }

     auto returnData = assetTag.substr(requestData->offset, requestData->bytes);

     responseData->tagLength = assetTag.size();

     memcpy(response, outPayload.data(), outPayload.size());
     memcpy(static_cast<uint8_t*>(response) + outPayload.size(),
            returnData.data(), returnData.size());
     *data_len = outPayload.size() + returnData.size();

     return IPMI_CC_OK;
 }

 ipmi_ret_t setAssetTag(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                        ipmi_request_t request, ipmi_response_t response,
                        ipmi_data_len_t data_len, ipmi_context_t context)
 {
     auto requestData = reinterpret_cast<const dcmi::SetAssetTagRequest*>
                    (request);
     std::vector<uint8_t> outPayload(sizeof(dcmi::SetAssetTagResponse));
     auto responseData = reinterpret_cast<dcmi::SetAssetTagResponse*>
             (outPayload.data());

     if (requestData->groupID != dcmi::groupExtId)
     {
         *data_len = 0;
         return IPMI_CC_INVALID_FIELD_REQUEST;
     }

     // Verify offset to read and number of bytes to read are not exceeding the
     // range.
     if ((requestData->offset > dcmi::assetTagMaxOffset) ||
         (requestData->bytes > dcmi::maxBytes) ||
         ((requestData->offset + requestData->bytes) > dcmi::assetTagMaxSize))
     {
         *data_len = 0;
         return IPMI_CC_PARM_OUT_OF_RANGE;
     }

     std::string assetTag;

     try
     {
         assetTag = dcmi::readAssetTag();

         if (requestData->offset > assetTag.size())
         {
             *data_len = 0;
             return IPMI_CC_PARM_OUT_OF_RANGE;
         }

         assetTag.replace(requestData->offset,
                          assetTag.size() - requestData->offset,
                          static_cast<const char*>(request) +
                          sizeof(dcmi::SetAssetTagRequest),
                          requestData->bytes);

         dcmi::writeAssetTag(assetTag);

         responseData->groupID = dcmi::groupExtId;
         responseData->tagLength = assetTag.size();
         memcpy(response, outPayload.data(), outPayload.size());
         *data_len = outPayload.size();

         return IPMI_CC_OK;
     }
     catch (InternalFailure& e)
     {
         *data_len = 0;
         return IPMI_CC_UNSPECIFIED_ERROR;
     }
 }

 void register_netfn_dcmi_functions()
 {
     // <Get Power Limit>
     printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_GRPEXT, IPMI_CMD_DCMI_GET_POWER_LIMIT);
     ipmi_register_callback(NETFUN_GRPEXT, IPMI_CMD_DCMI_GET_POWER_LIMIT, NULL, getPowerLimit,
                            PRIVILEGE_USER);

     // <Set Power Limit>
     printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_GRPEXT, IPMI_CMD_DCMI_SET_POWER_LIMIT);
     ipmi_register_callback(NETFUN_GRPEXT, IPMI_CMD_DCMI_SET_POWER_LIMIT, NULL, setPowerLimit,
                            PRIVILEGE_OPERATOR);

     // <Activate/Deactivate Power Limit>
     printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_GRPEXT, IPMI_CMD_DCMI_APPLY_POWER_LIMIT);
     ipmi_register_callback(NETFUN_GRPEXT, IPMI_CMD_DCMI_APPLY_POWER_LIMIT, NULL, applyPowerLimit,
                            PRIVILEGE_OPERATOR);

     // <Get Asset Tag>
     printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_GRPEXT, IPMI_CMD_DCMI_GET_ASSET_TAG);
     ipmi_register_callback(NETFUN_GRPEXT, IPMI_CMD_DCMI_GET_ASSET_TAG, NULL, getAssetTag,
                            PRIVILEGE_USER);

     // <Set Asset Tag>
     printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_GRPEXT, IPMI_CMD_DCMI_SET_ASSET_TAG);
     ipmi_register_callback(NETFUN_GRPEXT, IPMI_CMD_DCMI_SET_ASSET_TAG, NULL, setAssetTag,
                            PRIVILEGE_OPERATOR);
     return;
 }
 // 956379
	#include "dcmihandler.hpp"
	#include "host-ipmid/ipmid-api.h"
	#include <phosphor-logging/elog-errors.hpp>
	#include <phosphor-logging/log.hpp>
	#include <sdbusplus/bus.hpp>
	#include "utils.hpp"
	#include <stdio.h>
	#include <string.h>
	#include <stdint.h>
	#include "xyz/openbmc_project/Common/error.hpp"

	using namespace phosphor::logging;
	using InternalFailure =
	sdbusplus::xyz::openbmc_project::Common::Error::InternalFailure;

	void register_netfn_dcmi_functions() __attribute__((constructor));

	constexpr auto PCAP_PATH = "/xyz/openbmc_project/control/host0/power_cap";
	constexpr auto PCAP_INTERFACE = "xyz.openbmc_project.Control.Power.Cap";

	constexpr auto POWER_CAP_PROP = "PowerCap";
	constexpr auto POWER_CAP_ENABLE_PROP = "PowerCapEnable";

	using namespace phosphor::logging;

	namespace dcmi
	{

	uint32_t getPcap(sdbusplus::bus::bus& bus)
	{
	auto settingService = ipmi::getService(bus,
	PCAP_INTERFACE,PCAP_PATH);

	auto method = bus.new_method_call(settingService.c_str(),
	PCAP_PATH,
	"org.freedesktop.DBus.Properties",
	"Get");

	method.append(PCAP_INTERFACE, POWER_CAP_PROP);
	auto reply = bus.call(method);

	if (reply.is_method_error())
	{
	log<level::ERR>("Error in getPcap prop");
	elog<InternalFailure>();
	}
	sdbusplus::message::variant<uint32_t> pcap;
	reply.read(pcap);

	return pcap.get<uint32_t>();
	}

	bool getPcapEnabled(sdbusplus::bus::bus& bus)
	{
	auto settingService = ipmi::getService(bus,
	PCAP_INTERFACE,PCAP_PATH);

	auto method = bus.new_method_call(settingService.c_str(),
	PCAP_PATH,
	"org.freedesktop.DBus.Properties",
	"Get");

	method.append(PCAP_INTERFACE, POWER_CAP_ENABLE_PROP);
	auto reply = bus.call(method);

	if (reply.is_method_error())
	{
	log<level::ERR>("Error in getPcapEnabled prop");
	elog<InternalFailure>();
	}
	sdbusplus::message::variant<bool> pcapEnabled;
	reply.read(pcapEnabled);

	return pcapEnabled.get<bool>();
	}

	void setPcap(sdbusplus::bus::bus& bus, const uint32_t powerCap)
	{
	auto service = ipmi::getService(bus, PCAP_INTERFACE, PCAP_PATH);

	auto method = bus.new_method_call(service.c_str(),
	PCAP_PATH,
	"org.freedesktop.DBus.Properties",
	"Set");

	method.append(PCAP_INTERFACE, POWER_CAP_PROP);
	method.append(sdbusplus::message::variant<uint32_t>(powerCap));

	auto reply = bus.call(method);

	if (reply.is_method_error())
	{
	log<level::ERR>("Error in setPcap property");
	elog<InternalFailure>();
	}
	}

	void setPcapEnable(sdbusplus::bus::bus& bus, bool enabled)
	{
	auto service = ipmi::getService(bus, PCAP_INTERFACE, PCAP_PATH);

	auto method = bus.new_method_call(service.c_str(),
	PCAP_PATH,
	"org.freedesktop.DBus.Properties",
	"Set");

	method.append(PCAP_INTERFACE, POWER_CAP_ENABLE_PROP);
	method.append(sdbusplus::message::variant<bool>(enabled));

	auto reply = bus.call(method);

	if (reply.is_method_error())
	{
	log<level::ERR>("Error in setPcapEnabled property");
	elog<InternalFailure>();
	}
	}

	void readAssetTagObjectTree(dcmi::assettag::ObjectTree& objectTree)
	{
	static constexpr auto mapperBusName = "xyz.openbmc_project.ObjectMapper";
	static constexpr auto mapperObjPath = "/xyz/openbmc_project/object_mapper";
	static constexpr auto mapperIface = "xyz.openbmc_project.ObjectMapper";
	static constexpr auto inventoryRoot = "/xyz/openbmc_project/inventory/";

	sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
	auto depth = 0;

	auto mapperCall = bus.new_method_call(mapperBusName,
	mapperObjPath,
	mapperIface,
	"GetSubTree");

	mapperCall.append(inventoryRoot);
	mapperCall.append(depth);
	mapperCall.append(std::vector<std::string>({dcmi::assetTagIntf}));

	auto mapperReply = bus.call(mapperCall);
	if (mapperReply.is_method_error())
	{
	log<level::ERR>("Error in mapper call");
	elog<InternalFailure>();
	}

	mapperReply.read(objectTree);

	if (objectTree.empty())
	{
	log<level::ERR>("AssetTag property is not populated");
	elog<InternalFailure>();
	}
	}

	std::string readAssetTag()
	{
	sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
	dcmi::assettag::ObjectTree objectTree;

	// Read the object tree with the inventory root to figure out the object
	// that has implemented the Asset tag interface.
	readAssetTagObjectTree(objectTree);

	auto method = bus.new_method_call(
	(objectTree.begin()->second.begin()->first).c_str(),
	(objectTree.begin()->first).c_str(),
	dcmi::propIntf,
	"Get");
	method.append(dcmi::assetTagIntf);
	method.append(dcmi::assetTagProp);

	auto reply = bus.call(method);
	if (reply.is_method_error())
	{
	log<level::ERR>("Error in reading asset tag");
	elog<InternalFailure>();
	}

	sdbusplus::message::variant<std::string> assetTag;
	reply.read(assetTag);

	return assetTag.get<std::string>();
	}

	void writeAssetTag(const std::string& assetTag)
	{
	sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
	dcmi::assettag::ObjectTree objectTree;

	// Read the object tree with the inventory root to figure out the object
	// that has implemented the Asset tag interface.
	readAssetTagObjectTree(objectTree);

	auto method = bus.new_method_call(
	(objectTree.begin()->second.begin()->first).c_str(),
	(objectTree.begin()->first).c_str(),
	dcmi::propIntf,
	"Set");
	method.append(dcmi::assetTagIntf);
	method.append(dcmi::assetTagProp);
	method.append(sdbusplus::message::variant<std::string>(assetTag));

	auto reply = bus.call(method);
	if (reply.is_method_error())
	{
	log<level::ERR>("Error in writing asset tag");
	elog<InternalFailure>();
	}
	}

	} // namespace dcmi

	ipmi_ret_t getPowerLimit(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
	ipmi_request_t request, ipmi_response_t response,
	ipmi_data_len_t data_len, ipmi_context_t context)
	{
	auto requestData = reinterpret_cast<const dcmi::GetPowerLimitRequest*>
	(request);
	std::vector<uint8_t> outPayload(sizeof(dcmi::GetPowerLimitResponse));
	auto responseData = reinterpret_cast<dcmi::GetPowerLimitResponse*>
	(outPayload.data());

	if (requestData->groupID != dcmi::groupExtId)
	{
	*data_len = 0;
	return IPMI_CC_INVALID_FIELD_REQUEST;
	}

	sdbusplus::bus::bus sdbus {ipmid_get_sd_bus_connection()};
	uint32_t pcapValue = 0;
	bool pcapEnable = false;

	try
	{
	pcapValue = dcmi::getPcap(sdbus);
	pcapEnable = dcmi::getPcapEnabled(sdbus);
	}
	catch (InternalFailure& e)
	{
	*data_len = 0;
	return IPMI_CC_UNSPECIFIED_ERROR;
	}

	responseData->groupID = dcmi::groupExtId;

	/*
	* Exception action if power limit is exceeded and cannot be controlled
	* with the correction time limit is hardcoded to Hard Power Off system
	* and log event to SEL.
	*/
	constexpr auto exception = 0x01;
	responseData->exceptionAction = exception;

	responseData->powerLimit = static_cast<uint16_t>(pcapValue);

	/*
	* Correction time limit and Statistics sampling period is currently not
	* populated.
	*/

	*data_len = outPayload.size();
	memcpy(response, outPayload.data(), *data_len);

	if (pcapEnable)
	{
	return IPMI_CC_OK;
	}
	else
	{
	return IPMI_DCMI_CC_NO_ACTIVE_POWER_LIMIT;
	}
	}

	ipmi_ret_t setPowerLimit(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
	ipmi_request_t request, ipmi_response_t response,
	ipmi_data_len_t data_len, ipmi_context_t context)
	{
	auto requestData = reinterpret_cast<const dcmi::SetPowerLimitRequest*>
	(request);
	std::vector<uint8_t> outPayload(sizeof(dcmi::SetPowerLimitResponse));
	auto responseData = reinterpret_cast<dcmi::SetPowerLimitResponse*>
	(outPayload.data());

	if (requestData->groupID != dcmi::groupExtId)
	{
	*data_len = 0;
	return IPMI_CC_INVALID_FIELD_REQUEST;
	}

	sdbusplus::bus::bus sdbus {ipmid_get_sd_bus_connection()};

	// Only process the power limit requested in watts.
	try
	{
	dcmi::setPcap(sdbus, requestData->powerLimit);
	}
	catch (InternalFailure& e)
	{
	*data_len = 0;
	return IPMI_CC_UNSPECIFIED_ERROR;
	}

	log<level::INFO>("Set Power Cap",
	entry("POWERCAP=%u", requestData->powerLimit));

	responseData->groupID = dcmi::groupExtId;
	memcpy(response, outPayload.data(), outPayload.size());
	*data_len = outPayload.size();

	return IPMI_CC_OK;
	}

	ipmi_ret_t applyPowerLimit(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
	ipmi_request_t request, ipmi_response_t response,
	ipmi_data_len_t data_len, ipmi_context_t context)
	{
	auto requestData = reinterpret_cast<const dcmi::ApplyPowerLimitRequest*>
	(request);
	std::vector<uint8_t> outPayload(sizeof(dcmi::ApplyPowerLimitResponse));
	auto responseData = reinterpret_cast<dcmi::ApplyPowerLimitResponse*>
	(outPayload.data());

	if (requestData->groupID != dcmi::groupExtId)
	{
	*data_len = 0;
	return IPMI_CC_INVALID_FIELD_REQUEST;
	}

	sdbusplus::bus::bus sdbus {ipmid_get_sd_bus_connection()};

	try
	{
	dcmi::setPcapEnable(sdbus,
	static_cast<bool>(requestData->powerLimitAction));
	}
	catch (InternalFailure& e)
	{
	*data_len = 0;
	return IPMI_CC_UNSPECIFIED_ERROR;
	}

	log<level::INFO>("Set Power Cap Enable",
	entry("POWERCAPENABLE=%u", requestData->powerLimitAction));

	responseData->groupID = dcmi::groupExtId;
	memcpy(response, outPayload.data(), outPayload.size());
	*data_len = outPayload.size();

	return IPMI_CC_OK;
	}

	ipmi_ret_t getAssetTag(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
	ipmi_request_t request, ipmi_response_t response,
	ipmi_data_len_t data_len, ipmi_context_t context)
	{
	auto requestData = reinterpret_cast<const dcmi::GetAssetTagRequest*>
	(request);
	std::vector<uint8_t> outPayload(sizeof(dcmi::GetAssetTagResponse));
	auto responseData = reinterpret_cast<dcmi::GetAssetTagResponse*>
	(outPayload.data());

	if (requestData->groupID != dcmi::groupExtId)
	{
	*data_len = 0;
	return IPMI_CC_INVALID_FIELD_REQUEST;
	}

	// Verify offset to read and number of bytes to read are not exceeding the
	// range.
	if ((requestData->offset > dcmi::assetTagMaxOffset) \|\|
	(requestData->bytes > dcmi::maxBytes) \|\|
	((requestData->offset + requestData->bytes) > dcmi::assetTagMaxSize))
	{
	*data_len = 0;
	return IPMI_CC_PARM_OUT_OF_RANGE;
	}

	std::string assetTag;

	try
	{
	assetTag = dcmi::readAssetTag();
	}
	catch (InternalFailure& e)
	{
	*data_len = 0;
	return IPMI_CC_UNSPECIFIED_ERROR;
	}

	responseData->groupID = dcmi::groupExtId;

	// Return if the asset tag is not populated.
	if (!assetTag.size())
	{
	responseData->tagLength = 0;
	memcpy(response, outPayload.data(), outPayload.size());
	*data_len = outPayload.size();
	return IPMI_CC_OK;
	}

	// If the asset tag is longer than 63 bytes, restrict it to 63 bytes to suit
	// Get Asset Tag command.
	if (assetTag.size() > dcmi::assetTagMaxSize)
	{
	assetTag.resize(dcmi::assetTagMaxSize);
	}

	// If the requested offset is beyond the asset tag size.
	if (requestData->offset >= assetTag.size())
	{
	*data_len = 0;
	return IPMI_CC_PARM_OUT_OF_RANGE;
	}

	auto returnData = assetTag.substr(requestData->offset, requestData->bytes);

	responseData->tagLength = assetTag.size();

	memcpy(response, outPayload.data(), outPayload.size());
	memcpy(static_cast<uint8_t*>(response) + outPayload.size(),
	returnData.data(), returnData.size());
	*data_len = outPayload.size() + returnData.size();

	return IPMI_CC_OK;
	}

	ipmi_ret_t setAssetTag(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
	ipmi_request_t request, ipmi_response_t response,
	ipmi_data_len_t data_len, ipmi_context_t context)
	{
	auto requestData = reinterpret_cast<const dcmi::SetAssetTagRequest*>
	(request);
	std::vector<uint8_t> outPayload(sizeof(dcmi::SetAssetTagResponse));
	auto responseData = reinterpret_cast<dcmi::SetAssetTagResponse*>
	(outPayload.data());

	if (requestData->groupID != dcmi::groupExtId)
	{
	*data_len = 0;
	return IPMI_CC_INVALID_FIELD_REQUEST;
	}

	// Verify offset to read and number of bytes to read are not exceeding the
	// range.
	if ((requestData->offset > dcmi::assetTagMaxOffset) \|\|
	(requestData->bytes > dcmi::maxBytes) \|\|
	((requestData->offset + requestData->bytes) > dcmi::assetTagMaxSize))
	{
	*data_len = 0;
	return IPMI_CC_PARM_OUT_OF_RANGE;
	}

	std::string assetTag;

	try
	{
	assetTag = dcmi::readAssetTag();

	if (requestData->offset > assetTag.size())
	{
	*data_len = 0;
	return IPMI_CC_PARM_OUT_OF_RANGE;
	}

	assetTag.replace(requestData->offset,
	assetTag.size() - requestData->offset,
	static_cast<const char*>(request) +
	sizeof(dcmi::SetAssetTagRequest),
	requestData->bytes);

	dcmi::writeAssetTag(assetTag);

	responseData->groupID = dcmi::groupExtId;
	responseData->tagLength = assetTag.size();
	memcpy(response, outPayload.data(), outPayload.size());
	*data_len = outPayload.size();

	return IPMI_CC_OK;
	}
	catch (InternalFailure& e)
	{
	*data_len = 0;
	return IPMI_CC_UNSPECIFIED_ERROR;
	}
	}

	void register_netfn_dcmi_functions()
	{
	// <Get Power Limit>
	printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_GRPEXT, IPMI_CMD_DCMI_GET_POWER_LIMIT);
	ipmi_register_callback(NETFUN_GRPEXT, IPMI_CMD_DCMI_GET_POWER_LIMIT, NULL, getPowerLimit,
	PRIVILEGE_USER);

	// <Set Power Limit>
	printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_GRPEXT, IPMI_CMD_DCMI_SET_POWER_LIMIT);
	ipmi_register_callback(NETFUN_GRPEXT, IPMI_CMD_DCMI_SET_POWER_LIMIT, NULL, setPowerLimit,
	PRIVILEGE_OPERATOR);

	// <Activate/Deactivate Power Limit>
	printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_GRPEXT, IPMI_CMD_DCMI_APPLY_POWER_LIMIT);
	ipmi_register_callback(NETFUN_GRPEXT, IPMI_CMD_DCMI_APPLY_POWER_LIMIT, NULL, applyPowerLimit,
	PRIVILEGE_OPERATOR);

	// <Get Asset Tag>
	printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_GRPEXT, IPMI_CMD_DCMI_GET_ASSET_TAG);
	ipmi_register_callback(NETFUN_GRPEXT, IPMI_CMD_DCMI_GET_ASSET_TAG, NULL, getAssetTag,
	PRIVILEGE_USER);

	// <Set Asset Tag>
	printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_GRPEXT, IPMI_CMD_DCMI_SET_ASSET_TAG);
	ipmi_register_callback(NETFUN_GRPEXT, IPMI_CMD_DCMI_SET_ASSET_TAG, NULL, setAssetTag,
	PRIVILEGE_OPERATOR);
	return;
	}
	// 956379