errlmanager.H

/* IBM_PROLOG_BEGIN_TAG                                                   */
/* This is an automatically generated prolog.                             */
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/* $Source: src/include/usr/errl/errlmanager.H $                          */
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/* OpenPOWER HostBoot Project                                             */
/*                                                                        */
/* Contributors Listed Below - COPYRIGHT 2011,2019                        */
/* [+] Google Inc.                                                        */
/* [+] International Business Machines Corp.                              */
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/* IBM_PROLOG_END_TAG                                                     */
#ifndef ERRLMANAGER_H
#define ERRLMANAGER_H
/**
 *  @file errlmanager.H
 *
 *  @brief  Error Log management for Host Boot environment.
 *
 */

/*****************************************************************************/
// I n c l u d e s
/*****************************************************************************/
#include <util/singleton.H>
#include <errl/errlentry.H>
#include <errldisplay/errldisplay.H>
#include <sys/sync.h>
#include <hbotcompid.H>
#include <hwas/common/hwasCallout.H>
#include <mbox/mbox_queues.H>
#include <mbox/mboxif.H>
#include <utility>
#include <list>

namespace ERRORLOG
{

/**
 *  @brief  Global function to log an error
 *  Writes the log to PNOR where committed logs are kept.
 *  If there's not enough room, remove the latest log(s) to make
 *  enough room to commit this log.
 *  The error log will be automatically deleted after the
 *  commit.  The input handle will be set to NULL.
 *  For Host Boot environment, there's no individual committer
 *  (i.e. committer = Host Boot), so no component ID of
 *  committer is specified.
 *  This function is global in order to workaround the singleton
 *  linker issue in HostBoot (linker can't find singleton outside of
 *  a module).
 *
 *  @param[in,out] io_err          Error log handle to be committed
 *  @param[in]     i_comitterComp  Component committing the error log
 *
 *  @return None
 */
void errlCommit(errlHndl_t& io_err, compId_t i_committerComp );

/**
 *  @brief  Global function to determine if INFO and Recovered errors
 *          should be skipped or forwarded
 *
 *  @param[in]     None
 *
 *  @return iv_hiddenErrLogsEnable
 */
uint8_t getHiddenLogsEnable();

/**
 * @brief Returns the cached VERSION partition, if any. Makes a call to
 *        ErrlManager::getCachedVersionPartition
 * @return uint8_t* The pointer to the binary contents of the VERSION
 *         partition; nullptr will be returned if VERSION hasn't been
 *         cached yet of if there was an error during caching
 */
const uint8_t* getCachedVersionPartition();

/**
 * @brief Returns the size of the cached VERSION partition. Makes a call
 *        to ErrlManager::getCachedVersionPartitionSize
 * @return size_t The size of the cached VERSION partition. A 0 will be
 *         returned if VERSION hasn't been cached yet or if there was an
 *         error during caching
 */
size_t getCachedVersionPartitionSize();

/*
 * @brief Call to ErrlManager to cache the VERSION PNOR partition into an
 *        internal buffer.
 *
 * @return errlHndl_t nullptr on success; non-nullptr on error.
 */
errlHndl_t cacheVersionPartition();

/**
 *  @brief  Global enums used by static errlResourceReady function
 */
enum errlManagerNeeds
{
    PNOR,
    TARG,
    MBOX,
    IPMI,
    ERRLDISP,
} ;


/*****************************************************************************/
// Forward class declarations
/*****************************************************************************/
class ErrlEntry;
class ErrlManager;

// Singleton - Use "theErrlManager::instance()" to access the singleton
typedef Singleton<ErrlManager> theErrlManager;

/**
 *  @brief  Error log manager
 *  This class provides interfaces to perform some specific tasks
 *  on existing error objects such as committing a log, sending the
 *  log to the SP, etc..
 */
class ErrlManager
{

public:

    /**
      *  @brief Commit an error log by sending it to the repository
      *  Writes the log to PNOR where committed logs are kept.
      *  If there's not enough room, remove the latest log(s) to make
      *  enough room to commit this log.
      *  The error log will be automatically deleted after the
      *  commit.  The input handle will be set to NULL.
      *  For Host Boot environment, there's no individual committer
      *  (i.e. committer = Host Boot), so no component ID of
      *  committer is specified.
      *
      *  @param[in,out] io_err  Error log handle to be committed
      *
      *  @return None
      */
     void commitErrLog(errlHndl_t& io_err, compId_t i_committerComp );

     /**
      * @brief  Returns a unique error log ID
      *
      * This routine generates a unique Error ID and assign it to
      * the input error log. Mutates iv_currLogId.
      *
      * @return  Unique generated error log ID
      */
     uint32_t getUniqueErrId();

     /**
      * @brief Sets the HWAS ProcessCallout function pointer
      *
      * This is called by HWAS to inform errlmanager that HWAS is loaded and
      * therefore it can call HWAS to process callout information in an errlog
      *
      * It is a static function because a module cannot call an interface on a
      * singleton in another module
      */
     static void setHwasProcessCalloutFn(HWAS::processCalloutFn i_fn);

     /**
      * @brief Sends msg to errlmanager telling what resources are ready
      *
      * This is called by resources that the ErrlManager needs, which start up
      * AFTER ErrlManager starts.
      *
      * It is a static function because a module cannot call an interface on a
      * singleton in another module
      */
     static void errlResourceReady(errlManagerNeeds i_needs);

     /**
      * @brief Sends msg to errlmanager to ack sending of errl to BMC
      *
      * This is called by ipmi code once the SEL for the indicated errorlog
      * has been successfully sent to the BMC
      *
      * It is a static function because a module cannot call an interface on a
      * singleton in another module
      */
     static void errlAckErrorlog(uint32_t i_eid);

     /**
      * @brief Calls flush error logs
      *
      * This is called by doIstep after every istep to ensure that the error
      * logs have been cleared out before checking if a reconfigure loop
      * is needed
      *
      * It is a static function because a module cannot call an interface on a
      * singleton in another module
      */
      static void callFlushErrorLogs();

     /**
      * @brief  Returns the HWAS ProcessCallout function pointer
      *
      * This is called by ErrlEntry::commit to get the HWAS ProcessCallout
      * function pointer, this is called to process callout information in an
      * errlog, if NULL is returned then the function cannot be called (because
      * the HWAS module is not loaded)
      *
      * @return HWAS::processCalloutFn function pointer
      */
      HWAS::processCalloutFn getHwasProcessCalloutFn() const
      {
          return iv_hwasProcessCalloutFn;
      }

    /**
     * @brief Determines if any non-informational logs have been committed
     *        during this boot.
     *
     * @return true - A non-informational log has been committed.
     */
     static bool errlCommittedThisBoot();

    /**
     * @brief Returns the cached VERSION partition, if any
     * @return uint8_t* The pointer to the binary contents of the VERSION
     *         partition
     */
    const uint8_t* getCachedVersionPartition() const;

    /**
     * @brief Returns the size of the cached VERSION partition
     * @return size_t The size of the cached VERSION partition
     */
    size_t getCachedVersionPartitionSize() const;

     /**
      * @brief Cache the VERSION PNOR partition into a member buffer. The
      *        buffer is dynamically allocated here to hold the contents of the
      *        partition. If any error occurs during the execution, the buffer
      *        is deleted and the error is returned. This function is not
      *        supposed to be called within ErrlManager message handler, since
      *        the function itself makes synchronous calls to various message
      *        handlers. Note that once the partition is cached, the cache is
      *        never purged to make sure all possible error logs receive the
      *        VERSION field. No-op on FSP systems.
      *
      * @return errlHndl_t nullptr on success; non-nullptr on error.
      */
     errlHndl_t cacheVersionPartition();


    /**
     * @brief   Value to determine what logs are to be skipped. Mirrors
     *          what is currently set in ATTR_HIDDEN_ERRLOGS_ENABLE
     */
    static uint8_t iv_hiddenErrLogsEnable;

protected:
    /**
     * @brief   Destructor
     *
     * Releases all resources owned by the handle.  If the log has not
     * been committed, it effectively aborts the log.
     * All logs (committed or not) must be deleted to avoid a resource leak.
     *
     * @return  None
     *
     */
    ~ErrlManager();

    /**
     * @brief Default constructor
     *        Protected so only SingletonHolder can call
     */
    ErrlManager();

private:

    /**
     * @enum ERRLOG_MSG_TYPE
     *
     * @brief Message types that recognized by the error log message queue
     */
    enum ERRLOG_MSG_TYPE
    {
        ERRLOG_NEEDS_TO_BE_COMMITTED_TYPE  = 0x00000030 | MBOX::FIRST_SECURE_MSG,
        ERRLOG_SEND_TO_FSP_TYPE            = 0x00000031 | MBOX::FIRST_SECURE_MSG,
        ERRLOG_COMMITTED_ACK_RESPONSE_TYPE = 0x00000032 | MBOX::FIRST_UNSECURE_MSG,
        ERRLOG_SHUTDOWN_TYPE               = 0x00000033 | MBOX::FIRST_SECURE_MSG,
        ERRLOG_ACCESS_PNOR_TYPE            = 0x00000034 | MBOX::FIRST_SECURE_MSG,
        ERRLOG_ACCESS_MBOX_TYPE            = 0x00000035 | MBOX::FIRST_SECURE_MSG,
        ERRLOG_ACCESS_TARG_TYPE            = 0x00000036 | MBOX::FIRST_SECURE_MSG,
        ERRLOG_ACCESS_ERRLDISP_TYPE        = 0x00000037 | MBOX::FIRST_SECURE_MSG,
        ERRLOG_ACCESS_IPMI_TYPE            = 0x00000038 | MBOX::FIRST_SECURE_MSG,
        ERRLOG_FLUSH_TYPE                  = 0x00000039 | MBOX::FIRST_SECURE_MSG,
    };

    /**
     * @enum  ERRORLOG_PLID_OFFSET
     *
     * Base ID of Hostboot PLIDs.  The hostboot plid range is 0x90 to 0x93
     * for each instance running on a multinode system.
     *
     * NOTE: Changes to this define (if '9' changes) will require changes to
     *       CpuManager::requestShutdown
     */
    enum ERRORLOG_PLID_OFFSET
    {
#ifdef __HOSTBOOT_RUNTIME
        ERRLOG_PLID_BASE        = 0x80000000,// Hostboot Runtime Base PLID Offset
        ERRLOG_PLID_BASE_MASK   = 0x89000000,// mask of just the id
#else
        ERRLOG_PLID_BASE        = 0x90000000,// Hostboot Base PLID Offset
        ERRLOG_PLID_BASE_MASK   = 0x9F000000,// mask of just the id
#endif
        ERRLOG_PLID_NODE_SHIFT  = 24,        // shift to put node number 0x9#
        ERRLOG_PLID_MASK        = 0x00FFFFFF,// mask to find log number
        ERRLOG_PLID_INITIAL     = 0x00800000,// min number for pre-boot
        ERRLOG_PLID_PRE_MAX     = 0x00FFFFFF,// max number during pre-boot
        ERRLOG_PLID_POST_MAX    = 0x007FFFFF,// max number after pre-boot
    };

    /**
      * @brief   Disabled copy constructor and assignment operator
      */
    ErrlManager(const ErrlManager& i_right);
    ErrlManager& operator=(const ErrlManager& i_right);

     /**
      * @brief Sends msg to errlmanager telling what resources are ready
      *
      * called by static errlResourceReady function.
      */
     void sendResourcesMsg(errlManagerNeeds i_needs);

     /**
      * @brief Flushes out the error log queue before calling to process
      * deferred deconfigs
      *
      * called by static callFlushErrorLogs function.
      */

     void flushErrorLogs();

     /**
      * @brief Sends msg to errlmanager telling which errlog to ack
      *
      * called by static errlAckErrorlog function.
      */
     void sendAckErrorlog(uint32_t i_eid);

    /**
     * @brief Access PNOR and get the address and size of the HBEL section in
     * PNOR; sets the iv_pnorAddr, iv_maxErrlInPnor, iv_pnorOpenSlot variables;
     * parses the error logs in PNOR and determines the new iv_currLogId.
     *
     * @param[in/out] NONE
     * @return NONE.
     */
    void setupPnorInfo();

    /**
     * @brief Create and register the error log message queue
     *
     * @param[in/out] NONE
     * @return NONE.
     */
    void msgQueueInit ();

    /**
     *  @brief Performs startup of the error log processing thread.
     *
     *  @param[in/out]
     *  @return NONE
     */
     static void * startup ( void* i_self );

    /**
     *  @brief Performs setup of the PNOR info.  Done as a separate
     *         thread to handle error conditions (ECC on HBEL) where
     *         task gets killed.
     *
     *  @param[in/out]
     *  @return NONE
     */
     static void * pnorSetupThread ( void* i_self );

    /**
     * @brief Message handler for process Hostboot error log message
     *        and send it to FSP.
     *
     * @param[in/out] NONE
     * @return NONE
     *
     */
    void errlogMsgHndlr ();

    /**
     * @brief Send Host boot error log to error message queue for committing.
     *
     * @param[in,out] io_err Error log handle to be committed
     * @param[in] i_committerComp Component id that committed the error
     *
     * @return NONE
     *
     */
    void sendErrlogToMessageQueue ( errlHndl_t& io_err, compId_t i_committerComp );

    /**
     * @brief Create a mailbox message with the error log and send it to Fsp.
     *
     * @param[in,out] io_err Error log handle to be committed
     *
     */
    void sendErrLogToFSP ( errlHndl_t& io_err );

    /**
     * @brief Create a mailbox message with the error log and send it to Fsp.
     *
     * @param[in,out] io_err Error log handle to be committed
     * @return NONE
     *
     */
    void sendMboxMsg ( errlHndl_t& io_err );

#ifdef STORE_ERRL_IN_L3
    /**
     * @brief Save errlog entry in the memory
     *
     * @param[in,out] io_err Error log handle to be committed
     * @return NULL
     *
     */
    void saveErrLogEntry( errlHndl_t& io_err );
#endif

    /**
     * @brief Shutdown error log manager
     *
     * @param[in,out] None
     * @return NULL
     *
     */
    void errlogShutdown();

    /**
      * @brief    Current log ID.  As new error logs are created,
      * this value will be used to assign the new error log its ID.
      */
    uint32_t    iv_currLogId;

    /**
      * @brief    Base & Node part of log ID.
      *  This value will be used as a common ID among this node's error logs
      */
    uint32_t    iv_baseNodeId;

    /**
     *  @brief   Indicates if PNOR is ready for handling error logs
     *  Will cause a switch of MIN/MAX values used in calculating the
     *  next iv_currLogId.
     */
    bool        iv_pnorReadyForErrorLogs;

    /**
     *  @brief  Indicates if we have processed a shutdown event message
     */
    bool        iv_recvdShutdownEvent;

    /**
      * @brief
      * Pointer to the header that precedes the error log storage buffer
      * in L3 RAM.  This may go away when we adopt PNOR, or else become
      * instance variables instead of a pointer pointing within the
      * storage buffer.
      */
    storage_header_t * iv_pStorage;

    /**
      * @brief    Pointer to the HWAS processCallout function
      */
    HWAS::processCalloutFn iv_hwasProcessCalloutFn;

    /**
      * @brief Message queue for error log
      */
    msg_q_t iv_msgQ;

    // functions relating to writing the errorlogs to PNOR

    /**
     * @brief flatten and save the error log into PNOR
     *
     * @param[in]   error log handle
     * @return      true if saved in PNOR, false if not
     *
     */
    bool saveErrLogToPnor( errlHndl_t& io_err);

    /**
     * @brief find the flattened error log in PNOR and set it's ACK bit
     *
     * @param[in]   i_errEid EID of the error log to look for
     * @return      true if we successfully set the ACK bit,
     *              false if we couldn't find that errlog in PNOR
     */
    bool ackErrLogInPnor( uint32_t i_errEid );

    /**
     * @brief check the state of the PNOR 'slot'
     *
     * @param[in]   i_position - index into PNOR to check
     * @return      true if slot is empty
     *                  (first 32bits == EMPTY_ERRLOG_IN_PNOR)
     *
     */
    bool isSlotEmpty(uint32_t i_position);

    /**
     * @brief check the state of the PNOR 'slot'
     *          ONLY to be called on a slot that is NOT empty
     *
     * @param[in]   i_position - index into PNOR to check
     * @return      true if errlog in this slot has been ACKed
     *                  (ACK bit in word5 is 0x0)
     *
     */
    bool isSlotACKed(uint32_t i_position);

    /**
     * @brief increment the iv_PnorOpenSlot variable to the next
     *      available slot, handling wrap and checking that the
     *      slot is either EMPTY or has an ACKed error log.
     *
     * @return true if there was an open slot, false if PNOR is full
     *
     */
    bool incrementPnorOpenSlot();

    /**
     * @brief read the Eid from the flattened error log in PNOR;
     *      MUST point to a non-empty slot
     *
     * @param[in]   i_position - index into PNOR to check
     * @return      eid for that error log
     *
     */
    uint32_t readEidFromFlattened(uint32_t i_position);

    /**
     * @brief read the Plid from the flattened error log in PNOR;
     *      MUST point to a non-empty slot
     *
     * @param[in]   i_position - index into PNOR to check
     * @return      plid for that error log
     *
     */
    uint32_t readPlidFromFlattened(uint32_t i_position);

    /**
     * @brief set the ACK bit in the flattened error log in PNOR;
     *      MUST point to a non-empty slot
     *
     * @param[in]   i_position - index into PNOR to check
     * @return NONE
     *
     */
    void setACKInFlattened(uint32_t i_position);

#ifdef CONFIG_BMC_IPMI
    /**
     * @brief Create an ipmi message with the error log and send it to BMC
     *
     * @param[in,out] io_err Error log handle to be committed
     * @param[in]     i_sendSels true if sensor SELs should be sent to BMC,
     *                           false if not (ie, on read from PNOR, do not
     *                                 (re)send the SEL to the BMC
     */
    void sendErrLogToBmc(errlHndl_t &io_err, bool i_sendSels = true);
#endif

    /**
      * @brief errorlog-into-PNOR variables
      */
    char *iv_pnorAddr;          // HBEL section in PNOR
    uint32_t iv_maxErrlInPnor;  // max number of errorlogs that will fit
    uint32_t iv_pnorOpenSlot;   // current open slot available for an errorlog
    bool iv_isSpBaseServices;   // do we need to send to FSP
    bool iv_isMboxEnabled;      // are we able to send to FSP
    bool iv_isIpmiEnabled;      // are we able to send to BMC via IPMI
    bool iv_nonInfoCommitted;   // Keeps track of any non-informational logs.
    bool iv_isErrlDisplayEnabled; // are we able to use the errorDisplay

    // Errl flags which represent processing needed by the errl
    // represented as a bit field (8 bits)
    // Note: When adding a new flag, add to the trace in errlogShutdown()
    enum ERRLOG_FLAGS
    {
        PNOR_FLAG       = 0x01,
        MBOX_FLAG       = 0x02,
        ERRLDISP_FLAG   = 0x04,
        IPMI_FLAG       = 0x08,
        IPMI_NOSEL_FLAG = 0x10,
        ALL_FLAGS       = PNOR_FLAG | MBOX_FLAG
    #ifdef CONFIG_BMC_IPMI
                                    | IPMI_FLAG
    #endif
    #ifdef CONFIG_CONSOLE_OUTPUT_ERRORDISPLAY
                                    | ERRLDISP_FLAG
    #endif
    };

    // List of messages errl manager needs to handle
    // The unint8_t is a bit field to indiciate what needs to be done
    typedef std::pair<errlHndl_t, uint8_t> ErrlFlagPair_t;
    typedef std::list<ErrlFlagPair_t> ErrlList_t;
    typedef ErrlList_t::iterator ErrlListItr_t;
    ErrlList_t iv_errlList;

    /**
     * @brief checks if the flag is set
     *
     * @param[in]   i_pair - pair of errl and bitfield of flags
     * @param[in]   i_flag - specific flag
     * @return      True if specified flag is set
     *
     */
    static bool _isFlagSet(const ErrlFlagPair_t &i_pair,
                                const ERRLOG_FLAGS i_flag)
    {
        return (i_pair.second & i_flag);
    }

    /**
     * @brief clears the flag, indicating complete
     *
     * @param[in/out]   io_pair - pair of errl and bitfield of flags
     * @param[in]       i_flag - specific flag
     * @return          NA
     *
     */
    static void _clearFlag(ErrlFlagPair_t &io_pair,
                            const ERRLOG_FLAGS i_flag)
    {
        io_pair.second &= ~i_flag;
    }

    /**
     * @brief Checks if all flags are cleared for a errlhndl.
     *        If so deletes and NULLs the errl and removes from errl list.
     *        It then updates the iterator accordingly, done in this function
     *        to properly handle when a list.erase() happens
     *
     * @param[in/out]   io_it - iterator for the iv_errlList
     * @return          True if an erase occurred, otherwise false
     *
     */
    bool _updateErrlListIter(ErrlListItr_t & io_it);

    /**
     * @brief helper function to set the 'iv_skipShowingLog' flag of an error
     * log. this needs to be called when we first get an errl object before we
     * try to handle it. ie, when it's going to be committed, AND when it's
     * been unflattened out of PNOR
     *
     * @param[in/out]   io_err - errorlog that's being checked and updatd
     */
    void setErrlSkipFlag(errlHndl_t io_err);

#ifdef CONFIG_BMC_IPMI
    /**
     * @brief Helper function to grab the value of
     *        ATTR_ALLOW_CALLHOME_ESELS_TO_BMC and
     *        return it as a boolean value
     *
     * @return true if these ESELs are allowed, false otherwise
     */
    bool allowCallHomeEselsToBmc(void);
#endif

    const uint8_t* iv_versionPartitionCache; // The bin contents of the VERSION
                                             // partition; once cached, the
                                             // constents are never removed

    size_t iv_versionPartitionCacheSize; // The size of the VERSION partition

    bool iv_isVersionPartitionCached; // Whether the caching of the VERSION
                                      // partition has been attempted

};



#ifdef CONFIG_BMC_IPMI
/**
 *  @brief Sensor Modifier
 *  This purpose of this class is to detect certain types of procedure callouts
 *  and modify the sensor information generated by associated hardware callouts
 *  to provide the user with better information about hardware errors.
 */
class SensorModifier
{
    /**
     *  @brief Flag for procedure callouts
     *
     *  Used as a bit string to hold the flags for each procedure callout of
     *  interest that will modify a sensor.  For example, in the LSB a one
     *  indicates that a memory plugging error was seen.
     */
    uint64_t iv_flag;

      /**
     *  @brief This enum defines the masks that specify the bit within iv_flag
     *  that correspond to a procedure callout flag.  No two procedure callouts
     *  should use the same bit.  For example, a memory plugging error flag is
     *  stored in the rightmost bit so it's mask is 0x0000000000000001.
     */
    enum {
        memory_plugging_error_mask=0x0000000000000001,
        bus_error_mask=0x0000000000000002,
        membus_error_mask=0x00000000000000004,
    };

public:
    /**
     *  @brief Constructor
     *  The constructor initializes flags for procedure callouts.
     */
    SensorModifier();

    /**
     * @brief considerCallout
     * Consider this callout as a potential sensor modifier if an association
     * for it exists. This is called for each callout being considered in a
     * given error log. Each callout must be considered first, before any
     * sensor modification is attempted (via modifySensor).
     *
     * @parm [in] i_ud   Callout being considered
     *
     * @return  none
     */

    void considerCallout(HWAS::callout_ud_t *i_ud);
    /**
     * @brief  modifySensor
     * Modify the senor if needed.  Need for modification is based on whether
     * considerCallout has set a flag for that sensor.  So, modifySensor
     * is called in a second pass for each sensor generated by the previously
     * considered callouts.  See the documentation for considerCallout.
     *
     * @param [in]  i_sensorType Sensor type to be considered for modification
     * @param [out] o_eventDirType EventDirType to be modified based on sensor
     * @param [out] o_specificOffset An array of offsets to modified based on
     *              sensor.
     *
     * @return      Returns a boolean, where a value of true indicates that the
     *              sensor was modified.
     */
    bool modifySensor(uint8_t i_sensorType, uint8_t& o_eventDirType,
                      uint8_t& o_specificOffset);
};
#endif //CONFIG_BMC_IPMI


} // End namespace

#endif //ERRLMANAGER_H