redfish-core/lib/pcie.hpp

/*
// Copyright (c) 2018 Intel 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.
*/

#pragma once

#include "app.hpp"
#include "dbus_utility.hpp"
#include "generated/enums/pcie_device.hpp"
#include "query.hpp"
#include "registries/privilege_registry.hpp"
#include "utils/dbus_utils.hpp"

#include <boost/system/linux_error.hpp>
#include <sdbusplus/asio/property.hpp>
#include <sdbusplus/unpack_properties.hpp>

namespace redfish
{

static constexpr char const* pcieService = "xyz.openbmc_project.PCIe";
static constexpr char const* pciePath = "/xyz/openbmc_project/PCIe";
static constexpr char const* pcieDeviceInterface =
    "xyz.openbmc_project.PCIe.Device";

static inline void
    getPCIeDeviceList(const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
                      const std::string& name)
{
    dbus::utility::getSubTreePaths(
        pciePath, 1, {},
        [asyncResp, name](const boost::system::error_code& ec,
                          const dbus::utility::MapperGetSubTreePathsResponse&
                              pcieDevicePaths) {
        if (ec)
        {
            BMCWEB_LOG_DEBUG << "no PCIe device paths found ec: "
                             << ec.message();
            // Not an error, system just doesn't have PCIe info
            return;
        }
        nlohmann::json& pcieDeviceList = asyncResp->res.jsonValue[name];
        pcieDeviceList = nlohmann::json::array();
        for (const std::string& pcieDevicePath : pcieDevicePaths)
        {
            size_t devStart = pcieDevicePath.rfind('/');
            if (devStart == std::string::npos)
            {
                continue;
            }

            std::string devName = pcieDevicePath.substr(devStart + 1);
            if (devName.empty())
            {
                continue;
            }
            nlohmann::json::object_t pcieDevice;
            pcieDevice["@odata.id"] =
                "/redfish/v1/Systems/system/PCIeDevices/" + devName;
            pcieDeviceList.push_back(std::move(pcieDevice));
        }
        asyncResp->res.jsonValue[name + "@odata.count"] = pcieDeviceList.size();
        });
}

inline void requestRoutesSystemPCIeDeviceCollection(App& app)
{
    /**
     * Functions triggers appropriate requests on DBus
     */
    BMCWEB_ROUTE(app, "/redfish/v1/Systems/<str>/PCIeDevices/")
        .privileges(redfish::privileges::getPCIeDeviceCollection)
        .methods(boost::beast::http::verb::get)(
            [&app](const crow::Request& req,
                   const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
                   const std::string& systemName) {
        if (!redfish::setUpRedfishRoute(app, req, asyncResp))
        {
            return;
        }
        if (systemName != "system")
        {
            messages::resourceNotFound(asyncResp->res, "ComputerSystem",
                                       systemName);
            return;
        }

        asyncResp->res.jsonValue["@odata.type"] =
            "#PCIeDeviceCollection.PCIeDeviceCollection";
        asyncResp->res.jsonValue["@odata.id"] =
            "/redfish/v1/Systems/system/PCIeDevices";
        asyncResp->res.jsonValue["Name"] = "PCIe Device Collection";
        asyncResp->res.jsonValue["Description"] = "Collection of PCIe Devices";
        asyncResp->res.jsonValue["Members"] = nlohmann::json::array();
        asyncResp->res.jsonValue["Members@odata.count"] = 0;
        getPCIeDeviceList(asyncResp, "Members");
        });
}

inline std::optional<pcie_device::PCIeTypes>
    redfishPcieGenerationFromDbus(const std::string& generationInUse)
{
    if (generationInUse ==
        "xyz.openbmc_project.Inventory.Item.PCIeSlot.Generations.Gen1")
    {
        return pcie_device::PCIeTypes::Gen1;
    }
    if (generationInUse ==
        "xyz.openbmc_project.Inventory.Item.PCIeSlot.Generations.Gen2")
    {
        return pcie_device::PCIeTypes::Gen2;
    }
    if (generationInUse ==
        "xyz.openbmc_project.Inventory.Item.PCIeSlot.Generations.Gen3")
    {
        return pcie_device::PCIeTypes::Gen3;
    }
    if (generationInUse ==
        "xyz.openbmc_project.Inventory.Item.PCIeSlot.Generations.Gen4")
    {
        return pcie_device::PCIeTypes::Gen4;
    }
    if (generationInUse ==
        "xyz.openbmc_project.Inventory.Item.PCIeSlot.Generations.Gen5")
    {
        return pcie_device::PCIeTypes::Gen5;
    }
    if (generationInUse.empty() ||
        generationInUse ==
            "xyz.openbmc_project.Inventory.Item.PCIeSlot.Generations.Unknown")
    {
        return pcie_device::PCIeTypes::Invalid;
    }

    // The value is not unknown or Gen1-5, need return an internal error.
    return std::nullopt;
}

inline void requestRoutesSystemPCIeDevice(App& app)
{
    BMCWEB_ROUTE(app, "/redfish/v1/Systems/<str>/PCIeDevices/<str>/")
        .privileges(redfish::privileges::getPCIeDevice)
        .methods(boost::beast::http::verb::get)(
            [&app](const crow::Request& req,
                   const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
                   const std::string& systemName, const std::string& device) {
        if (!redfish::setUpRedfishRoute(app, req, asyncResp))
        {
            return;
        }
        if (systemName != "system")
        {
            messages::resourceNotFound(asyncResp->res, "ComputerSystem",
                                       systemName);
            return;
        }

        auto getPCIeDeviceCallback =
            [asyncResp, device](
                const boost::system::error_code ec,
                const dbus::utility::DBusPropertiesMap& pcieDevProperties) {
            if (ec)
            {
                BMCWEB_LOG_DEBUG
                    << "failed to get PCIe Device properties ec: " << ec.value()
                    << ": " << ec.message();
                if (ec.value() ==
                    boost::system::linux_error::bad_request_descriptor)
                {
                    messages::resourceNotFound(asyncResp->res, "PCIeDevice",
                                               device);
                }
                else
                {
                    messages::internalError(asyncResp->res);
                }
                return;
            }

            const std::string* manufacturer = nullptr;
            const std::string* deviceType = nullptr;
            const std::string* generationInUse = nullptr;
            const size_t* lanesInUse = nullptr;

            const bool success = sdbusplus::unpackPropertiesNoThrow(
                dbus_utils::UnpackErrorPrinter(), pcieDevProperties,
                "Manufacturer", manufacturer, "DeviceType", deviceType,
                "LanesInUse", lanesInUse, "GenerationInUse", generationInUse);

            if (!success)
            {
                messages::internalError(asyncResp->res);
                return;
            }

            // The default value of LanesInUse is 0, and the field will be
            // left as off if it is a default value.
            if (lanesInUse != nullptr && *lanesInUse != 0)
            {
                asyncResp->res.jsonValue["PCIeInterface"]["LanesInUse"] =
                    *lanesInUse;
            }

            if (generationInUse != nullptr)
            {
                std::optional<pcie_device::PCIeTypes> redfishGenerationInUse =
                    redfishPcieGenerationFromDbus(*generationInUse);
                if (!redfishGenerationInUse)
                {
                    messages::internalError(asyncResp->res);
                    return;
                }
                if (*redfishGenerationInUse != pcie_device::PCIeTypes::Invalid)
                {
                    asyncResp->res.jsonValue["PCIeInterface"]["PCIeType"] =
                        *redfishGenerationInUse;
                }
            }

            if (manufacturer != nullptr)
            {
                asyncResp->res.jsonValue["Manufacturer"] = *manufacturer;
            }

            if (deviceType != nullptr)
            {
                asyncResp->res.jsonValue["DeviceType"] = *deviceType;
            }

            asyncResp->res.jsonValue["@odata.type"] =
                "#PCIeDevice.v1_4_0.PCIeDevice";
            asyncResp->res.jsonValue["@odata.id"] =
                "/redfish/v1/Systems/system/PCIeDevices/" + device;
            asyncResp->res.jsonValue["Name"] = "PCIe Device";
            asyncResp->res.jsonValue["Id"] = device;

            asyncResp->res.jsonValue["PCIeFunctions"]["@odata.id"] =
                "/redfish/v1/Systems/system/PCIeDevices/" + device +
                "/PCIeFunctions";
        };
        std::string escapedPath = std::string(pciePath) + "/" + device;
        dbus::utility::escapePathForDbus(escapedPath);
        sdbusplus::asio::getAllProperties(
            *crow::connections::systemBus, pcieService, escapedPath,
            pcieDeviceInterface, std::move(getPCIeDeviceCallback));
        });
}

inline void requestRoutesSystemPCIeFunctionCollection(App& app)
{
    /**
     * Functions triggers appropriate requests on DBus
     */
    BMCWEB_ROUTE(app,
                 "/redfish/v1/Systems/system/PCIeDevices/<str>/PCIeFunctions/")
        .privileges(redfish::privileges::getPCIeFunctionCollection)
        .methods(boost::beast::http::verb::get)(
            [&app](const crow::Request& req,
                   const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
                   const std::string& device) {
        if (!redfish::setUpRedfishRoute(app, req, asyncResp))
        {
            return;
        }

        asyncResp->res.jsonValue["@odata.type"] =
            "#PCIeFunctionCollection.PCIeFunctionCollection";
        asyncResp->res.jsonValue["@odata.id"] =
            "/redfish/v1/Systems/system/PCIeDevices/" + device +
            "/PCIeFunctions";
        asyncResp->res.jsonValue["Name"] = "PCIe Function Collection";
        asyncResp->res.jsonValue["Description"] =
            "Collection of PCIe Functions for PCIe Device " + device;

        auto getPCIeDeviceCallback =
            [asyncResp, device](
                const boost::system::error_code ec,
                const dbus::utility::DBusPropertiesMap& pcieDevProperties) {
            if (ec)
            {
                BMCWEB_LOG_DEBUG
                    << "failed to get PCIe Device properties ec: " << ec.value()
                    << ": " << ec.message();
                if (ec.value() ==
                    boost::system::linux_error::bad_request_descriptor)
                {
                    messages::resourceNotFound(asyncResp->res, "PCIeDevice",
                                               device);
                }
                else
                {
                    messages::internalError(asyncResp->res);
                }
                return;
            }

            nlohmann::json& pcieFunctionList =
                asyncResp->res.jsonValue["Members"];
            pcieFunctionList = nlohmann::json::array();
            static constexpr const int maxPciFunctionNum = 8;
            for (int functionNum = 0; functionNum < maxPciFunctionNum;
                 functionNum++)
            {
                // Check if this function exists by looking for a
                // device ID
                std::string devIDProperty =
                    "Function" + std::to_string(functionNum) + "DeviceId";
                const std::string* property = nullptr;
                for (const auto& propEntry : pcieDevProperties)
                {
                    if (propEntry.first == devIDProperty)
                    {
                        property = std::get_if<std::string>(&propEntry.second);
                    }
                }
                if (property == nullptr || property->empty())
                {
                    continue;
                }
                nlohmann::json::object_t pcieFunction;
                pcieFunction["@odata.id"] =
                    "/redfish/v1/Systems/system/PCIeDevices/" + device +
                    "/PCIeFunctions/" + std::to_string(functionNum);
                pcieFunctionList.push_back(std::move(pcieFunction));
            }
            asyncResp->res.jsonValue["Members@odata.count"] =
                pcieFunctionList.size();
        };
        std::string escapedPath = std::string(pciePath) + "/" + device;
        dbus::utility::escapePathForDbus(escapedPath);
        sdbusplus::asio::getAllProperties(
            *crow::connections::systemBus, pcieService, escapedPath,
            pcieDeviceInterface, std::move(getPCIeDeviceCallback));
        });
}

inline void requestRoutesSystemPCIeFunction(App& app)
{
    BMCWEB_ROUTE(
        app,
        "/redfish/v1/Systems/system/PCIeDevices/<str>/PCIeFunctions/<str>/")
        .privileges(redfish::privileges::getPCIeFunction)
        .methods(boost::beast::http::verb::get)(
            [&app](const crow::Request& req,
                   const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
                   const std::string& device, const std::string& function) {
        if (!redfish::setUpRedfishRoute(app, req, asyncResp))
        {
            return;
        }
        auto getPCIeDeviceCallback =
            [asyncResp, device, function](
                const boost::system::error_code ec,
                const dbus::utility::DBusPropertiesMap& pcieDevProperties) {
            if (ec)
            {
                BMCWEB_LOG_DEBUG
                    << "failed to get PCIe Device properties ec: " << ec.value()
                    << ": " << ec.message();
                if (ec.value() ==
                    boost::system::linux_error::bad_request_descriptor)
                {
                    messages::resourceNotFound(asyncResp->res, "PCIeDevice",
                                               device);
                }
                else
                {
                    messages::internalError(asyncResp->res);
                }
                return;
            }

            // Check if this function exists by looking for a device
            // ID
            std::string functionName = "Function" + function;
            std::string devIDProperty = functionName + "DeviceId";

            const std::string* devIdProperty = nullptr;
            for (const auto& property : pcieDevProperties)
            {
                if (property.first == devIDProperty)
                {
                    devIdProperty = std::get_if<std::string>(&property.second);
                    continue;
                }
            }
            if (devIdProperty == nullptr || devIdProperty->empty())
            {
                messages::resourceNotFound(asyncResp->res, "PCIeFunction",
                                           function);
                return;
            }

            asyncResp->res.jsonValue["@odata.type"] =
                "#PCIeFunction.v1_2_0.PCIeFunction";
            asyncResp->res.jsonValue["@odata.id"] =
                "/redfish/v1/Systems/system/PCIeDevices/" + device +
                "/PCIeFunctions/" + function;
            asyncResp->res.jsonValue["Name"] = "PCIe Function";
            asyncResp->res.jsonValue["Id"] = function;
            asyncResp->res.jsonValue["FunctionId"] = std::stoi(function);
            asyncResp->res.jsonValue["Links"]["PCIeDevice"]["@odata.id"] =
                "/redfish/v1/Systems/system/PCIeDevices/" + device;

            for (const auto& property : pcieDevProperties)
            {
                const std::string* strProperty =
                    std::get_if<std::string>(&property.second);
                if (property.first == functionName + "DeviceId")
                {
                    asyncResp->res.jsonValue["DeviceId"] = *strProperty;
                }
                if (property.first == functionName + "VendorId")
                {
                    asyncResp->res.jsonValue["VendorId"] = *strProperty;
                }
                if (property.first == functionName + "FunctionType")
                {
                    asyncResp->res.jsonValue["FunctionType"] = *strProperty;
                }
                if (property.first == functionName + "DeviceClass")
                {
                    asyncResp->res.jsonValue["DeviceClass"] = *strProperty;
                }
                if (property.first == functionName + "ClassCode")
                {
                    asyncResp->res.jsonValue["ClassCode"] = *strProperty;
                }
                if (property.first == functionName + "RevisionId")
                {
                    asyncResp->res.jsonValue["RevisionId"] = *strProperty;
                }
                if (property.first == functionName + "SubsystemId")
                {
                    asyncResp->res.jsonValue["SubsystemId"] = *strProperty;
                }
                if (property.first == functionName + "SubsystemVendorId")
                {
                    asyncResp->res.jsonValue["SubsystemVendorId"] =
                        *strProperty;
                }
            }
        };
        std::string escapedPath = std::string(pciePath) + "/" + device;
        dbus::utility::escapePathForDbus(escapedPath);
        sdbusplus::asio::getAllProperties(
            *crow::connections::systemBus, pcieService, escapedPath,
            pcieDeviceInterface, std::move(getPCIeDeviceCallback));
        });
}

} // namespace redfish