occ_status.hpp

#pragma once

#include "i2c_occ.hpp"
#include "occ_device.hpp"
#include "occ_events.hpp"

#include <functional>
#include <org/open_power/Control/Host/server.hpp>
#include <org/open_power/OCC/Status/server.hpp>
#include <sdbusplus/bus.hpp>
#include <sdbusplus/server/object.hpp>

namespace open_power
{
namespace occ
{

class Manager;
namespace Base = sdbusplus::org::open_power::OCC::server;
using Interface = sdbusplus::server::object::object<Base::Status>;

// IPMID's host control application
namespace Control = sdbusplus::org::open_power::Control::server;

// For waiting on signals
namespace sdbusRule = sdbusplus::bus::match::rules;

// OCC status instance. Ex. for "occ0", the instance is 0
using instanceID = int;

// IPMI sensor ID for a given OCC instance
using sensorID = uint8_t;

// Human readable sensor name for DBus tree. E.g. "CPU0_OCC"
using sensorName = std::string;

// OCC sensors definitions in the map
using sensorDefs = std::tuple<sensorID, sensorName>;

// OCC sysfs name prefix
const std::string sysfsName = "occ-hwmon";

/** @class Status
 *  @brief Implementation of OCC Active Status
 */
class Status : public Interface
{
  public:
    Status() = delete;
    ~Status() = default;
    Status(const Status&) = delete;
    Status& operator=(const Status&) = delete;
    Status(Status&&) = default;
    Status& operator=(Status&&) = default;

    /** @brief Constructs the Status object and
     *         the underlying device object
     *
     *  @param[in] bus      - DBus bus to attach to
     *  @param[in] event    - sd_event unique pointer reference
     *  @param[in] path     - DBus object path
     *  @param[in] manager  - OCC manager instance
     *  @param[in] callBack - Callback handler to invoke during
     *                        property change
     */
    Status(sdbusplus::bus::bus& bus, EventPtr& event, const char* path,
           const Manager& manager,
           std::function<void(bool)> callBack = nullptr) :
        Interface(bus, getDbusPath(path).c_str(), true),
        bus(bus), path(path), callBack(callBack), instance(getInstance(path)),
        device(event,
#ifdef I2C_OCC
               fs::path(DEV_PATH) / i2c_occ::getI2cDeviceName(path),
#else
               fs::path(DEV_PATH) /
                   fs::path(sysfsName + "." + std::to_string(instance + 1)),
#endif
               manager, *this,
               std::bind(std::mem_fn(&Status::deviceErrorHandler), this,
                         std::placeholders::_1)),
        hostControlSignal(
            bus,
            sdbusRule::type::signal() + sdbusRule::member("CommandComplete") +
                sdbusRule::path("/org/open_power/control/host0") +
                sdbusRule::interface("org.open_power.Control.Host") +
                sdbusRule::argN(0, Control::convertForMessage(
                                       Control::Host::Command::OCCReset)),
            std::bind(std::mem_fn(&Status::hostControlEvent), this,
                      std::placeholders::_1))
    {
        // Check to see if we have OCC already bound.  If so, just set it
        if (device.bound())
        {
            this->occActive(true);
        }

        // Announce that we are ready
        this->emit_object_added();
    }

    /** @brief Since we are overriding the setter-occActive but not the
     *         getter-occActive, we need to have this using in order to
     *         allow passthrough usage of the getter-occActive
     */
    using Base::Status::occActive;

    /** @brief SET OccActive to True or False
     *
     *  @param[in] value - Intended value
     *
     *  @return          - Updated value of the property
     */
    bool occActive(bool value) override;

    /** @brief Starts OCC error detection */
    inline void addErrorWatch()
    {
        return device.addErrorWatch();
    }

    /** @brief Stops OCC error detection */
    inline void removeErrorWatch()
    {
        return device.removeErrorWatch();
    }

    /** @brief Starts to watch how many OCCs are present on the master */
    inline void addPresenceWatchMaster()
    {
        return device.addPresenceWatchMaster();
    }

  private:
    /** @brief sdbus handle */
    sdbusplus::bus::bus& bus;

    /** @brief OCC dbus object path */
    std::string path;

    /** @brief Callback handler to be invoked during property change.
     *         This is a handler in Manager class
     */
    std::function<void(bool)> callBack;

    /** @brief OCC instance number. Ex, 0,1, etc */
    int instance;

    /** @brief OCC instance to Sensor definitions mapping */
    static const std::map<instanceID, sensorDefs> sensorMap;

    /** @brief OCC device object to do bind and unbind */
    Device device;

    /** @brief Subscribe to host control signal
     *
     *  Once the OCC reset is requested, BMC sends that message to host.
     *  If the host does not ack the message, then there would be a timeout
     *  and we need to catch that to log an error
     **/
    sdbusplus::bus::match_t hostControlSignal;

    /** @brief Callback handler when device errors are detected
     *
     *  @param[in]  error - True if an error is reported, false otherwise
     */
    void deviceErrorHandler(bool error);

    /** @brief Callback function on host control signals
     *
     *  @param[in]  msg - Data associated with subscribed signal
     */
    void hostControlEvent(sdbusplus::message::message& msg);

    /** @brief Sends a message to host control command handler to reset OCC
     */
    void resetOCC();

    /** @brief Determines the instance ID by specified object path.
     *  @param[in]  path  Estimated OCC Dbus object path
     *  @return  Instance number
     */
    static int getInstance(const std::string& path)
    {
        return (path.empty() ? 0 : path.back() - '0');
    }

    /** @brief Override the sensor name with name from the definition.
     *  @param[in]  estimatedPath - Estimated OCC Dbus object path
     *  @return  Fixed OCC DBus object path
     */
    static std::string getDbusPath(const std::string& estimatedPath)
    {
        if (!estimatedPath.empty())
        {
            auto it = sensorMap.find(getInstance(estimatedPath));
            if (sensorMap.end() != it)
            {
                auto& name = std::get<1>(it->second);
                if (!name.empty() && name != "None")
                {
                    auto path = fs::path(estimatedPath);
                    path.replace_filename(name);
                    return path.string();
                }
            }
        }

        return estimatedPath;
    }
};

} // namespace occ
} // namespace open_power