path: root/src/usr/hwas/hwasPlatDeconfigGard.C

/* IBM_PROLOG_BEGIN_TAG                                                   */
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/* $Source: src/usr/hwas/hwasPlatDeconfigGard.C $                         */
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/* OpenPOWER HostBoot Project                                             */
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/* Contributors Listed Below - COPYRIGHT 2013,2015                        */
/* [+] Google Inc.                                                        */
/* [+] International Business Machines Corp.                              */
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/* IBM_PROLOG_END_TAG                                                     */
/**
 *  @file hwasPlatDeconfigGard.C
 *
 *  @brief Platform specific deconfigGard functions
 */

#include <hwas/common/hwas.H>
#include <hwas/common/hwas_reasoncodes.H>
#include <hwas/common/hwasCommon.H>
#include <hwas/common/hwasCallout.H>
#include <hwas/common/deconfigGard.H>
#include <hwas/hwasPlat.H>

#include <devicefw/driverif.H>
#include <initservice/taskargs.H>
#include <vpd/mvpdenums.H>
#include <stdio.h>
#include <sys/mm.h>
#include <config.h>

#include <pnor/pnorif.H>

namespace HWAS
{

using namespace HWAS::COMMON;
using namespace TARGETING;

const uint32_t EMPTY_GARD_RECORDID = 0xFFFFFFFF;
/**
 * @brief Guard PNOR section info, obtained once for efficiency
 */
static PNOR::SectionInfo_t g_GardSectionInfo;

/**
 * @brief Flag indicating if getGardSectionInfo() was called previously
 */
static bool getGardSectionInfoCalled;

void _flush(void *i_addr);
errlHndl_t _GardRecordIdSetup(void *&io_platDeconfigGard);

errlHndl_t DeconfigGard::platLogEvent(
    const Target * const i_pTarget,
    const GardEvent i_eventType)
{
    errlHndl_t l_pErr = NULL;
    HWAS_DBG("LogEvent %d", i_eventType);

    return l_pErr;
}
/* Hostboot plat implementation of this function does not need to
 * re-log the error. Currently, it is handled by FSP since it's a
 * FSP-based-system requirement.
 */
errlHndl_t DeconfigGard::platReLogGardError (GardRecord &i_gardRecord)
{
    errlHndl_t l_pErr = NULL;
    HWAS_INF("Error Log ID: 0x%.8X", i_gardRecord.iv_errlogEid);
    return l_pErr;
}

errlHndl_t DeconfigGard::platClearGardRecords(
    const Target * const i_pTarget)
{
    errlHndl_t l_pErr = NULL;

#ifndef CONFIG_NO_GARD_SUPPORT
    EntityPath l_targetId;
    if (!i_pTarget)
    {
        HWAS_INF("Clear all GARD Records");
    }

    HWAS_MUTEX_LOCK(iv_mutex);
    l_pErr = _GardRecordIdSetup(iv_platDeconfigGard);
    if (!l_pErr && iv_platDeconfigGard)
    {
        uint32_t l_gardRecordsCleared = 0;
        HBDeconfigGard *l_hbDeconfigGard =
                (HBDeconfigGard *)iv_platDeconfigGard;
        DeconfigGard::GardRecord * l_pGardRecords =
                (DeconfigGard::GardRecord *)l_hbDeconfigGard->iv_pGardRecords;
        const uint32_t l_maxGardRecords = l_hbDeconfigGard->iv_maxGardRecords;
        for (uint32_t i = 0; i < l_maxGardRecords; i++)
        {
            if (l_pGardRecords[i].iv_recordId != EMPTY_GARD_RECORDID)
            {
                // specific or all
                if (i_pTarget)
                {
                    // if we have a match
                    if (l_pGardRecords[i].iv_targetId == l_targetId)
                    {
                        HWAS_INF("Clearing GARD Record for %.8X",
                                get_huid(i_pTarget));
                        l_pGardRecords[i].iv_recordId = EMPTY_GARD_RECORDID;
                        _flush(&l_pGardRecords[i]);
                        l_gardRecordsCleared++;
                        break; // done - can only be 1 GARD record per target
                    }
                }
                else // Clear all records
                {
                    l_pGardRecords[i].iv_recordId = EMPTY_GARD_RECORDID;
                    _flush(&l_pGardRecords[i]);
                    l_gardRecordsCleared++;
                }
            }
        } // for

        HWAS_INF("GARD Records Cleared: %d", l_gardRecordsCleared);
    }

    HWAS_MUTEX_UNLOCK(iv_mutex);
#endif // CONFIG_NO_GARD_SUPPORT
    return l_pErr;
}

errlHndl_t DeconfigGard::platGetGardRecords(
        const Target * const i_pTarget,
        GardRecords_t &o_records)
{
    errlHndl_t l_pErr = NULL;
    o_records.clear();

#ifndef CONFIG_NO_GARD_SUPPORT
    EntityPath l_targetId;
    if (!i_pTarget)
    {
        HWAS_INF("Get all GARD Records");
    }

    HWAS_MUTEX_LOCK(iv_mutex);
    l_pErr = _GardRecordIdSetup(iv_platDeconfigGard);
    if (!l_pErr && iv_platDeconfigGard)
    {
        HBDeconfigGard *l_hbDeconfigGard =
                (HBDeconfigGard *)iv_platDeconfigGard;
        DeconfigGard::GardRecord * l_pGardRecords =
                (DeconfigGard::GardRecord *)l_hbDeconfigGard->iv_pGardRecords;
        const uint32_t l_maxGardRecords = l_hbDeconfigGard->iv_maxGardRecords;
        for (uint32_t i = 0; i < l_maxGardRecords; i++)
        {
            if (l_pGardRecords[i].iv_recordId != EMPTY_GARD_RECORDID)
            {
                // specific or all
                if (i_pTarget)
                {
                    // if we have a match
                    if (l_pGardRecords[i].iv_targetId == l_targetId)
                    {
                        HWAS_INF("Getting GARD Record for %.8X",
                                get_huid(i_pTarget));
                        o_records.push_back(l_pGardRecords[i]);
                        break; // done - can only be 1 GARD record per target
                    }
                }
                else // get all records
                {
                    o_records.push_back(l_pGardRecords[i]);
                }
            }
        } // for
    }

    HWAS_MUTEX_UNLOCK(iv_mutex);
    HWAS_INF("Get returning %d GARD Records", o_records.size());
#endif // CONFIG_NO_GARD_SUPPORT
    return l_pErr;
}


errlHndl_t DeconfigGard::platCreateGardRecord(
        const Target * const i_pTarget,
        const uint32_t i_errlEid,
        const GARD_ErrorType i_errorType)
{
    HWAS_INF("Creating GARD Record for %.8X, errl 0x%X",
        get_huid(i_pTarget), i_errlEid);
    errlHndl_t l_pErr = NULL;

#ifndef CONFIG_NO_GARD_SUPPORT
    HWAS_MUTEX_LOCK(iv_mutex);

    do
    {
        const uint8_t lDeconfigGardable =
                i_pTarget->getAttr<ATTR_DECONFIG_GARDABLE>();
        const uint8_t lPresent =
                i_pTarget->getAttr<ATTR_HWAS_STATE>().present;
        if (!lDeconfigGardable || !lPresent)
        {
            // Target is not GARDable. Commit an error
            HWAS_ERR("Target not GARDable");

            /*@
             * @errortype
             * @moduleid     HWAS::MOD_PLAT_DECONFIG_GARD
             * @reasoncode   HWAS::RC_TARGET_NOT_GARDABLE
             * @devdesc      Attempt to create a GARD Record for a target that
             *               is not GARDable
             *               (not DECONFIG_GARDABLE or not present)
             * @custdesc     A problem occurred during the IPL of the system.
             *               Attempt to create a deconfiguration record for a
             *               target that is not deconfigurable or not present.
             * @userdata1    HUID of input target // GARD errlog EID
             * @userdata2    ATTR_DECONFIG_GARDABLE // ATTR_HWAS_STATE.present
             */
            const uint64_t userdata1 =
                (static_cast<uint64_t>(get_huid(i_pTarget)) << 32) | i_errlEid;
            const uint64_t userdata2 =
                (static_cast<uint64_t>(lDeconfigGardable) << 32) | lPresent;
            const bool hbSwError = true;
            l_pErr = new ERRORLOG::ErrlEntry(
                ERRORLOG::ERRL_SEV_UNRECOVERABLE,
                HWAS::MOD_PLAT_DECONFIG_GARD,
                HWAS::RC_TARGET_NOT_GARDABLE,
                userdata1, userdata2, hbSwError);
            break;
        }

        Target* pSys;
        targetService().getTopLevelTarget(pSys);
        HWAS_ASSERT(pSys, "HWAS platCreateGardRecord: no TopLevelTarget");

        // check for system CDM Policy
        const ATTR_CDM_POLICIES_type l_sys_policy =
                pSys->getAttr<ATTR_CDM_POLICIES>();
        if (l_sys_policy & CDM_POLICIES_MANUFACTURING_DISABLED)
        {
            // manufacturing records are disabled
            //  - don't process
            HWAS_INF("Manufacturing policy: disabled - skipping GARD Record create");
            break;
        }

        if ((l_sys_policy & CDM_POLICIES_PREDICTIVE_DISABLED) &&
            (i_errorType == GARD_Predictive))
        {
            // predictive records are disabled AND gard record is predictive
            //  - don't process
            HWAS_INF("Predictive policy: disabled - skipping GARD Record create");
            break;
        }

        l_pErr = _GardRecordIdSetup(iv_platDeconfigGard);
        if (l_pErr && iv_platDeconfigGard)
        {
            break;
        }

        // Find an empty GARD Record slot
        //  AND check to make sure we don't have a GARD record already
        EntityPath l_targetId = i_pTarget->getAttr<ATTR_PHYS_PATH>();
        GardRecord * l_pRecord = NULL;
        bool l_duplicate = false;
        HBDeconfigGard *l_hbDeconfigGard =
                (HBDeconfigGard *)iv_platDeconfigGard;
        DeconfigGard::GardRecord *l_pGardRecords =
                (DeconfigGard::GardRecord *)l_hbDeconfigGard->iv_pGardRecords;
        const uint32_t l_maxGardRecords = l_hbDeconfigGard->iv_maxGardRecords;
        for (uint32_t i = 0; i < l_maxGardRecords; i++)
        {
            if (l_pGardRecords[i].iv_recordId == EMPTY_GARD_RECORDID)
            {
                if (!l_pRecord)
                {
                    // save the first empty location we find
                    l_pRecord = &(l_pGardRecords[i]);
                }
            }
            else
            {
                if (l_pGardRecords[i].iv_targetId == l_targetId)
                {
                    l_duplicate = true;
                    l_pRecord = &(l_pGardRecords[i]);
                    HWAS_INF("Duplicate GARD Record from error 0x%X",
                            l_pGardRecords[i].iv_errlogEid);
                    break;
                }
            }
        } // for

        if (l_duplicate)
        {
            // there's already a GARD record for this target

            // if this GARD record was a manual gard - overwrite
            //  with this new one
            if (l_pRecord->iv_errorType == GARD_User_Manual)
            {
                HWAS_INF("Duplicate is GARD_User_Manual - overwriting");
                l_pRecord->iv_errlogEid = i_errlEid;
                l_pRecord->iv_errorType = i_errorType;
                _flush((void *)l_pRecord);
            }

            // either way, return success
            break;
        }

        if (!l_pRecord)
        {
            HWAS_ERR("GARD Record Repository full");

            // TODO RTC 96397
            // Hostboot will only write GARD Records to PNOR when it is the
            // gardRecordMaster. An error will be logged if GARD Record storage
            // exceeds 90% and the GARD Record will not be written if full. The
            // error will have a new procedure callout requesting that the
            // machine be serviced. Right now, this error log has no callouts.

            /*@
             * @errortype
             * @moduleid     HWAS::MOD_PLAT_DECONFIG_GARD
             * @reasoncode   HWAS::RC_GARD_REPOSITORY_FULL
             * @devdesc      Attempt to create a GARD Record and the GARD
             *               Repository is full
             * @custdesc     A problem occurred during the IPL of the system.
             *               Attempt to create a deconfiguration record for a
             *               target, but the deconfiguration repository is full.
             * @userdata1    HUID of input target // GARD errlog EID
             */
            const uint64_t userdata1 =
                (static_cast<uint64_t> (get_huid(i_pTarget)) << 32) |
                i_errlEid;
            l_pErr = new ERRORLOG::ErrlEntry(
                ERRORLOG::ERRL_SEV_UNRECOVERABLE,
                HWAS::MOD_PLAT_DECONFIG_GARD,
                HWAS::RC_GARD_REPOSITORY_FULL,
                userdata1);
            break;
        }

        l_pRecord->iv_recordId = l_hbDeconfigGard->iv_nextGardRecordId++;
        l_pRecord->iv_targetId = l_targetId;
        l_pRecord->iv_errlogEid = i_errlEid;
        l_pRecord->iv_errorType = i_errorType;
        l_pRecord->iv_padding[0] = 0;
        l_pRecord->iv_padding[1] = 0;
        l_pRecord->iv_padding[2] = 0;
        l_pRecord->iv_padding[3] = 0;
        l_pRecord->iv_padding[4] = 0;
        l_pRecord->iv_padding[5] = 0;

        _flush((void *)l_pRecord);
    }
    while (0);

    HWAS_MUTEX_UNLOCK(iv_mutex);
#endif // CONFIG_NO_GARD_SUPPORT
    return l_pErr;
}


//******************************************************************************
errlHndl_t _GardRecordIdSetup( void *&io_platDeconfigGard)
{
    HWAS_DBG("_GardRecordIdSetup: io_platDeconfigGard %p", io_platDeconfigGard);
    errlHndl_t l_pErr = NULL;

    do
    {
        // if this is NOT the first time thru here, we're done
        if (io_platDeconfigGard != NULL)
        {
            break;
        }

        // Get the PNOR Guard information
        PNOR::SectionInfo_t l_section;
        l_pErr = getGardSectionInfo(l_section);
        if (l_pErr)
        {
            HWAS_ERR("_GardRecordIdSetup: getGardSectionInfo failed!!!");
            // no support for GARD in this configuration.
            break;
        }
        // Check if guard section exists, as certain configs ignore the above
        // error (e.g. golden side has no GARD section)
        if (l_section.size == 0)
        {
            HWAS_ERR("_GardRecordIdSetup: No guard section skipping function");
            break;
        }

        // allocate our memory and set things up
        io_platDeconfigGard = malloc(sizeof(HBDeconfigGard));
        HBDeconfigGard *l_hbDeconfigGard =
                (HBDeconfigGard *)io_platDeconfigGard;

        l_hbDeconfigGard->iv_pGardRecords =
            reinterpret_cast<DeconfigGard::GardRecord *> (l_section.vaddr);
        HWAS_DBG("PNOR vaddr=%p size=%d", l_section.vaddr, l_section.size);

        l_hbDeconfigGard->iv_maxGardRecords = l_section.size /
                sizeof(DeconfigGard::GardRecord);
        l_hbDeconfigGard->iv_nextGardRecordId = 0;

        // Figure out the next GARD Record ID to use
        uint32_t l_numGardRecords = 0;
        const uint32_t l_maxGardRecords = l_hbDeconfigGard->iv_maxGardRecords;
        DeconfigGard::GardRecord *l_pGardRecords =
                (DeconfigGard::GardRecord *)l_hbDeconfigGard->iv_pGardRecords;
        for (uint32_t i = 0; i < l_maxGardRecords; i++)
        {
            // if this gard record is already filled out
            if (l_pGardRecords[i].iv_recordId
                    != EMPTY_GARD_RECORDID)
            {
                // count how many gard records are already defined
                l_numGardRecords++;

                // find the 'last' recordId, so that we can start after it
                if (l_pGardRecords[i].iv_recordId >
                        l_hbDeconfigGard->iv_nextGardRecordId)
                {
                    l_hbDeconfigGard->iv_nextGardRecordId =
                        l_pGardRecords[i].iv_recordId;
                }
            }
        } // for

        // next record will start after the highest Id we found
        l_hbDeconfigGard->iv_nextGardRecordId++;

        HWAS_INF("GARD setup. maxRecords %d nextID %d numRecords %d",
                 l_hbDeconfigGard->iv_maxGardRecords,
                 l_hbDeconfigGard->iv_nextGardRecordId,
                 l_numGardRecords);
    }
    while (0);

    return l_pErr;
}

void _flush(void *i_addr)
{
    HWAS_DBG("flushing GARD in PNOR: addr=%p", i_addr);
    int l_rc = mm_remove_pages(FLUSH, i_addr,
                sizeof(DeconfigGard::GardRecord));
    if (l_rc)
    {
        HWAS_ERR("mm_remove_pages(FLUSH,%p,%d) returned %d",
                i_addr, sizeof(DeconfigGard::GardRecord),l_rc);
    }
}

errlHndl_t getGardSectionInfo(PNOR::SectionInfo_t& o_sectionInfo)
{
    errlHndl_t l_errl = NULL;
    do
    {
        // getSectionInfo has already been called for GUARD_DATA
        if(getGardSectionInfoCalled)
        {
            o_sectionInfo = g_GardSectionInfo;
            break;
        }

        // Get Guard Section Info and set gardSectionInfo
        l_errl = PNOR::getSectionInfo(PNOR::GUARD_DATA, g_GardSectionInfo);
        if (l_errl)
        {
            g_GardSectionInfo.size = 0;
// @TODO RTC: 120061 - replace config flag with a pnor interface call to say if
//                     there is a guard section on the current (active) side
//                     of pnor
#ifdef CONFIG_PNOR_TWO_SIDE_SUPPORT
            HWAS_INF("getGardSectionInfo: No guard section disabling guard support");
            delete l_errl;
            l_errl = NULL;
#else
            HWAS_ERR("getGardSectionInfo:getSectionInfo failed");
#endif
        }
        else
        {
            HWAS_INF("getGardSectionInfo: Section %s found, size %d",
                      g_GardSectionInfo.name, g_GardSectionInfo.size);
        }

        o_sectionInfo = g_GardSectionInfo;
        getGardSectionInfoCalled = true;
    } while(0);

    return l_errl;
}

} // namespace HWAS