cpu/authenticamd/authamd_main.c

	authamd_main.c revision 20c794b39650d115e17a15983b6b82e46238cf45
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

/*
 * "Generic AMD" model-specific support.  If no more-specific support can
 * be found, or such modules declines to initialize, then for AuthenticAMD
 * cpus this module can have a crack at providing some AMD model-specific
 * support that at least goes beyond common MCA architectural features
 * if not down to the nitty-gritty level for a particular model.  We
 * are layered on top of a cpu module, likely cpu.generic, so there is no
 * need for us to perform common architecturally-accessible functions.
 */

#include <sys/types.h>
#include <sys/cmn_err.h>
#include <sys/modctl.h>
#include <sys/cpu_module.h>
#include <sys/mca_x86.h>
#include <sys/pci_cfgspace.h>
#include <sys/x86_archext.h>
#include <sys/mc_amd.h>
#include <sys/fm/protocol.h>
#include <sys/fm/cpu/GENAMD.h>
#include <sys/nvpair.h>
#include <sys/controlregs.h>
#include <sys/pghw.h>
#include <sys/sunddi.h>
#include <sys/cpu_module_ms_impl.h>

#include "authamd.h"

int authamd_ms_support_disable = 0;

#define AUTHAMD_F_REVS_BCDE \
    (X86_CHIPREV_AMD_F_REV_B | X86_CHIPREV_AMD_F_REV_C0 | \
    X86_CHIPREV_AMD_F_REV_CG | X86_CHIPREV_AMD_F_REV_D | \
    X86_CHIPREV_AMD_F_REV_E)

#define AUTHAMD_F_REVS_FG \
    (X86_CHIPREV_AMD_F_REV_F | X86_CHIPREV_AMD_F_REV_G)

#define AUTHAMD_10_REVS_AB \
    (X86_CHIPREV_AMD_10_REV_A | X86_CHIPREV_AMD_10_REV_B)

/*
 * Bitmasks of support for various features.  Try to enable features
 * via inclusion in one of these bitmasks and check that at the
 * feature imlementation - that way new family support may often simply
 * simply need to update these bitmasks.
 */

/*
 * Families that this module will provide some model-specific
 * support for (if no more-specific module claims it first).
 * We try to support whole families rather than differentiate down
 * to revision.
 */
#define AUTHAMD_SUPPORTED(fam) \
    ((fam) == AUTHAMD_FAMILY_6 || (fam) == AUTHAMD_FAMILY_F || \
    (fam) == AUTHAMD_FAMILY_10)

/*
 * Families/revisions for which we can recognise main memory ECC errors.
 */
#define AUTHAMD_MEMECC_RECOGNISED(rev) \
    (X86_CHIPREV_ATLEAST(rev, X86_CHIPREV_AMD_F_REV_B) || \
    X86_CHIPREV_ATLEAST(rev, X86_CHIPREV_AMD_10_REV_A))

/*
 * Families/revisions that have an Online Spare Control Register
 */
#define AUTHAMD_HAS_ONLINESPARECTL(rev) \
    (X86_CHIPREV_ATLEAST(rev, X86_CHIPREV_AMD_F_REV_F) || \
    X86_CHIPREV_ATLEAST(rev, X86_CHIPREV_AMD_10_REV_A))

/*
 * Families/revisions that have a NB misc register or registers -
 * evaluates to 0 if no support, otherwise the number of MC4_MISCj.
 */
#define AUTHAMD_NBMISC_NUM(rev) \
    (X86_CHIPREV_ATLEAST(rev, X86_CHIPREV_AMD_F_REV_F)? 1 : \
    (X86_CHIPREV_ATLEAST(rev, X86_CHIPREV_AMD_10_REV_A) ? 3 : 0))

/*
 * Families/revision for which we wish not to machine check for GART
 * table walk errors - bit 10 of NB CTL.
 */
#define AUTHAMD_NOGARTTBLWLK_MC(rev) \
    (X86_CHIPREV_ATLEAST(rev, X86_CHIPREV_AMD_F_REV_B) || \
    X86_CHIPREV_ATLEAST(rev, X86_CHIPREV_AMD_10_REV_A))

/*
 * We recognise main memory ECC errors for AUTHAMD_MEMECC_RECOGNISED
 * revisions as:
 *
 *  - being reported by the NB
 *  - being a compound bus/interconnect error (external to chip)
 *  - having LL of LG
 *  - having II of MEM (but could still be a master/target abort)
 *  - having CECC or UECC set
 *
 * We do not check the extended error code (first nibble of the
 * model-specific error code on AMD) since this has changed from
 * family 0xf to family 0x10 (ext code 0 now reserved on family 0x10).
 * Instead we use CECC/UECC to separate off the master/target
 * abort cases.
 *
 * We insist that the detector be the NorthBridge bank;  although
 * IC/DC can report some main memory errors, they do not capture
 * an address at sufficient resolution to be useful and the NB will
 * report most errors.
 */
#define AUTHAMD_IS_MEMECCERR(bank, status) \
    ((bank) == AMD_MCA_BANK_NB && \
    MCAX86_ERRCODE_ISBUS_INTERCONNECT(MCAX86_ERRCODE(status)) && \
    MCAX86_ERRCODE_LL(MCAX86_ERRCODE(status)) == MCAX86_ERRCODE_LL_LG && \
    MCAX86_ERRCODE_II(MCAX86_ERRCODE(status)) == MCAX86_ERRCODE_II_MEM && \
    ((status) & (AMD_BANK_STAT_CECC | AMD_BANK_STAT_UECC)))

static authamd_error_disp_t authamd_memce_disp = {
    FM_EREPORT_CPU_GENAMD,
    FM_EREPORT_CPU_GENAMD_MEM_CE,
    FM_EREPORT_GENAMD_PAYLOAD_FLAGS_MEM_CE
};

static authamd_error_disp_t authamd_memue_disp = {
    FM_EREPORT_CPU_GENAMD,
    FM_EREPORT_CPU_GENAMD_MEM_UE,
    FM_EREPORT_GENAMD_PAYLOAD_FLAGS_MEM_UE
};

static authamd_error_disp_t authamd_ckmemce_disp = {
    FM_EREPORT_CPU_GENAMD,
    FM_EREPORT_CPU_GENAMD_CKMEM_CE,
    FM_EREPORT_GENAMD_PAYLOAD_FLAGS_CKMEM_CE
};

static authamd_error_disp_t authamd_ckmemue_disp = {
    FM_EREPORT_CPU_GENAMD,
    FM_EREPORT_CPU_GENAMD_CKMEM_UE,
    FM_EREPORT_GENAMD_PAYLOAD_FLAGS_CKMEM_UE
};

/*
 * We recognise GART walk errors as:
 *
 *  - being reported by the NB
 *  - being a compound TLB error
 *  - having LL of LG and TT of GEN
 *  - having UC set
 *  - possibly having PCC set (if source CPU)
 */
#define AUTHAMD_IS_GARTERR(bank, status) \
    ((bank) == AMD_MCA_BANK_NB && \
    MCAX86_ERRCODE_ISTLB(MCAX86_ERRCODE(status)) && \
    MCAX86_ERRCODE_LL(MCAX86_ERRCODE(status)) == MCAX86_ERRCODE_LL_LG && \
    MCAX86_ERRCODE_TT(MCAX86_ERRCODE(status)) == MCAX86_ERRCODE_TT_GEN && \
    (status) & MSR_MC_STATUS_UC)

static authamd_error_disp_t authamd_gart_disp = {
    FM_EREPORT_CPU_GENAMD,          /* use generic subclass */
    FM_EREPORT_CPU_GENADM_GARTTBLWLK,   /* use generic leafclass */
    0                   /* no additional payload */
};


static struct authamd_chipshared *authamd_shared[AUTHAMD_MAX_CHIPS];

static int
authamd_chip_once(authamd_data_t *authamd, enum authamd_cfgonce_bitnum what)
{
    return (atomic_set_long_excl(&authamd->amd_shared->acs_cfgonce,
        what) == 0 ?  B_TRUE : B_FALSE);
}

static void
authamd_pcicfg_write(uint_t chipid, uint_t func, uint_t reg, uint32_t val)
{
    ASSERT(chipid + 24 <= 31);
    ASSERT((func & 7) == func);
    ASSERT((reg & 3) == 0 && reg < 256);

    cmi_pci_putl(0, chipid + 24, func, reg, 0, val);
}

static uint32_t
authamd_pcicfg_read(uint_t chipid, uint_t func, uint_t reg)
{
    ASSERT(chipid + 24 <= 31);
    ASSERT((func & 7) == func);
    ASSERT((reg & 3) == 0 && reg < 256);

    return (cmi_pci_getl(0, chipid + 24, func, reg, 0, 0));
}

void
authamd_bankstatus_prewrite(cmi_hdl_t hdl, authamd_data_t *authamd)
{
    uint64_t hwcr;

    if (cmi_hdl_rdmsr(hdl, MSR_AMD_HWCR, &hwcr) != CMI_SUCCESS)
        return;

    authamd->amd_hwcr = hwcr;

    if (!(hwcr & AMD_HWCR_MCI_STATUS_WREN)) {
        hwcr |= AMD_HWCR_MCI_STATUS_WREN;
        (void) cmi_hdl_wrmsr(hdl, MSR_AMD_HWCR, hwcr);
    }
}

void
authamd_bankstatus_postwrite(cmi_hdl_t hdl, authamd_data_t *authamd)
{
    uint64_t hwcr = authamd->amd_hwcr;

    if (!(hwcr & AMD_HWCR_MCI_STATUS_WREN)) {
        hwcr &= ~AMD_HWCR_MCI_STATUS_WREN;
        (void) cmi_hdl_wrmsr(hdl, MSR_AMD_HWCR, hwcr);
    }
}

/*
 * Read EccCnt repeatedly for all possible channel/chip-select combos:
 *
 *  - read sparectl register
 *  - if EccErrCntWrEn is set, clear that bit in the just-read value
 *    and write it back to sparectl;  this *may* clobber the EccCnt
 *    for the channel/chip-select combination currently selected, so
 *    we leave this bit clear if we had to clear it
 *  - cycle through all channel/chip-select combinations writing each
 *    combination to sparectl before reading the register back for
 *    EccCnt for that combination;  since EccErrCntWrEn is clear
 *    the writes to select what count to read will not themselves
 *    zero any counts
 */
static int
authamd_read_ecccnt(authamd_data_t *authamd, struct authamd_logout *msl)
{
    union mcreg_sparectl sparectl;
    uint_t chipid = authamd->amd_shared->acs_chipid;
    uint_t family = authamd->amd_shared->acs_family;
    uint32_t rev = authamd->amd_shared->acs_rev;
    int chan, cs;

    /*
     * Check for feature support;  this macro will test down to the
     * family revision number, whereafter we'll switch on family
     * assuming that future revisions will use the same register
     * format.
     */
    if (!AUTHAMD_HAS_ONLINESPARECTL(rev)) {
        bzero(&msl->aal_eccerrcnt, sizeof (msl->aal_eccerrcnt));
        return (0);
    }

    MCREG_VAL32(&sparectl) =
        authamd_pcicfg_read(chipid, MC_FUNC_MISCCTL, MC_CTL_REG_SPARECTL);

    switch (family) {
    case AUTHAMD_FAMILY_F:
        MCREG_FIELD_F_revFG(&sparectl, EccErrCntWrEn) = 0;
        break;

    case AUTHAMD_FAMILY_10:
        MCREG_FIELD_10_revAB(&sparectl, EccErrCntWrEn) = 0;
        break;
    }

    for (chan = 0; chan < AUTHAMD_DRAM_NCHANNEL; chan++) {
        switch (family) {
        case AUTHAMD_FAMILY_F:
            MCREG_FIELD_F_revFG(&sparectl, EccErrCntDramChan) =
                chan;
            break;

        case AUTHAMD_FAMILY_10:
            MCREG_FIELD_10_revAB(&sparectl, EccErrCntDramChan) =
                chan;
            break;
        }

        for (cs = 0; cs < AUTHAMD_DRAM_NCS; cs++) {
            switch (family) {
            case AUTHAMD_FAMILY_F:
                MCREG_FIELD_F_revFG(&sparectl,
                    EccErrCntDramCs) = cs;
                break;

            case AUTHAMD_FAMILY_10:
                MCREG_FIELD_10_revAB(&sparectl,
                    EccErrCntDramCs) = cs;
                break;
            }

            authamd_pcicfg_write(chipid, MC_FUNC_MISCCTL,
                MC_CTL_REG_SPARECTL, MCREG_VAL32(&sparectl));

            MCREG_VAL32(&sparectl) = authamd_pcicfg_read(chipid,
                MC_FUNC_MISCCTL, MC_CTL_REG_SPARECTL);

            switch (family) {
            case AUTHAMD_FAMILY_F:
                msl->aal_eccerrcnt[chan][cs] =
                    MCREG_FIELD_F_revFG(&sparectl, EccErrCnt);
                break;
            case AUTHAMD_FAMILY_10:
                msl->aal_eccerrcnt[chan][cs] =
                    MCREG_FIELD_10_revAB(&sparectl, EccErrCnt);
                break;
            }
        }
    }

    return (1);
}

/*
 * Clear EccCnt for all possible channel/chip-select combos:
 *
 *  - set EccErrCntWrEn in sparectl, if necessary
 *  - write 0 to EccCnt for all channel/chip-select combinations
 *  - clear EccErrCntWrEn
 *
 * If requested also disable the interrupts taken on counter overflow
 * and on swap done.
 */
static void
authamd_clear_ecccnt(authamd_data_t *authamd, boolean_t clrint)
{
    union mcreg_sparectl sparectl;
    uint_t chipid = authamd->amd_shared->acs_chipid;
    uint_t family = authamd->amd_shared->acs_family;
    uint32_t rev = authamd->amd_shared->acs_rev;
    int chan, cs;

    if (!AUTHAMD_HAS_ONLINESPARECTL(rev))
        return;

    MCREG_VAL32(&sparectl) =
        authamd_pcicfg_read(chipid, MC_FUNC_MISCCTL, MC_CTL_REG_SPARECTL);

    switch (family) {
    case AUTHAMD_FAMILY_F:
        MCREG_FIELD_F_revFG(&sparectl, EccErrCntWrEn) = 1;
        if (clrint) {
            MCREG_FIELD_F_revFG(&sparectl, EccErrInt) = 0;
            MCREG_FIELD_F_revFG(&sparectl, SwapDoneInt) = 0;
        }
        break;

    case AUTHAMD_FAMILY_10:
        MCREG_FIELD_10_revAB(&sparectl, EccErrCntWrEn) = 1;
        if (clrint) {
            MCREG_FIELD_10_revAB(&sparectl, EccErrInt) = 0;
            MCREG_FIELD_10_revAB(&sparectl, SwapDoneInt) = 0;
        }
        break;
    }

    authamd_pcicfg_write(chipid, MC_FUNC_MISCCTL,
        MC_CTL_REG_SPARECTL, MCREG_VAL32(&sparectl));

    for (chan = 0; chan < AUTHAMD_DRAM_NCHANNEL; chan++) {
        switch (family) {
        case AUTHAMD_FAMILY_F:
            MCREG_FIELD_F_revFG(&sparectl, EccErrCntDramChan) =
                chan;
            break;

        case AUTHAMD_FAMILY_10:
            MCREG_FIELD_10_revAB(&sparectl, EccErrCntDramChan) =
                chan;
            break;
        }

        for (cs = 0; cs < AUTHAMD_DRAM_NCS; cs++) {
            switch (family) {
            case AUTHAMD_FAMILY_F:
                MCREG_FIELD_F_revFG(&sparectl,
                    EccErrCntDramCs) = cs;
                MCREG_FIELD_F_revFG(&sparectl,
                    EccErrCnt) = 0;
                break;

            case AUTHAMD_FAMILY_10:
                MCREG_FIELD_10_revAB(&sparectl,
                    EccErrCntDramCs) = cs;
                MCREG_FIELD_10_revAB(&sparectl,
                    EccErrCnt) = 0;
                break;
            }

            authamd_pcicfg_write(chipid, MC_FUNC_MISCCTL,
                MC_CTL_REG_SPARECTL, MCREG_VAL32(&sparectl));
        }
    }
}

/*
 * cms_init entry point.
 *
 * This module provides broad model-specific support for AMD families
 * 0x6, 0xf and 0x10.  Future families will have to be evaluated once their
 * documentation is available.
 */
int
authamd_init(cmi_hdl_t hdl, void **datap)
{
    uint_t chipid = cmi_hdl_chipid(hdl);
    struct authamd_chipshared *sp, *osp;
    uint_t family = cmi_hdl_family(hdl);
    authamd_data_t *authamd;
    uint64_t cap;

    if (authamd_ms_support_disable || !AUTHAMD_SUPPORTED(family))
        return (ENOTSUP);

    if (!(x86_feature & X86_MCA))
        return (ENOTSUP);

    if (cmi_hdl_rdmsr(hdl, IA32_MSR_MCG_CAP, &cap) != CMI_SUCCESS)
        return (ENOTSUP);

    if (!(cap & MCG_CAP_CTL_P))
        return (ENOTSUP);

    authamd = *datap = kmem_zalloc(sizeof (authamd_data_t), KM_SLEEP);
    cmi_hdl_hold(hdl);  /* release in fini */
    authamd->amd_hdl = hdl;

    if ((sp = authamd_shared[chipid]) == NULL) {
        sp = kmem_zalloc(sizeof (struct authamd_chipshared), KM_SLEEP);
        osp = atomic_cas_ptr(&authamd_shared[chipid], NULL, sp);
        if (osp != NULL) {
            kmem_free(sp, sizeof (struct authamd_chipshared));
            sp = osp;
        } else {
            sp->acs_chipid = chipid;
            sp->acs_family = family;
            sp->acs_rev = cmi_hdl_chiprev(hdl);
        }
    }
    authamd->amd_shared = sp;

    return (0);
}

/*
 * cms_logout_size entry point.
 */
/*ARGSUSED*/
size_t
authamd_logout_size(cmi_hdl_t hdl)
{
    return (sizeof (struct authamd_logout));
}

/*
 * cms_mcgctl_val entry point
 *
 * Instead of setting all bits to 1 we can set just those for the
 * error detector banks known to exist.
 */
/*ARGSUSED*/
uint64_t
authamd_mcgctl_val(cmi_hdl_t hdl, int nbanks, uint64_t proposed)
{
    return (nbanks < 64 ? (1ULL << nbanks) - 1 : proposed);
}

/*
 * cms_bankctl_skipinit entry point
 *
 * On K6 we do not initialize MC0_CTL since, reportedly, this bank (for DC)
 * may produce spurious machine checks.
 */
/*ARGSUSED*/
boolean_t
authamd_bankctl_skipinit(cmi_hdl_t hdl, int bank)
{
    authamd_data_t *authamd = cms_hdl_getcmsdata(hdl);

    return (authamd->amd_shared->acs_family == AUTHAMD_FAMILY_6 &&
        bank == 0 ?  B_TRUE : B_FALSE);
}

/*
 * cms_bankctl_val entry point
 */
uint64_t
authamd_bankctl_val(cmi_hdl_t hdl, int bank, uint64_t proposed)
{
    authamd_data_t *authamd = cms_hdl_getcmsdata(hdl);
    uint32_t rev = authamd->amd_shared->acs_rev;
    uint64_t val = proposed;

    /*
     * The Intel MCA says we can write all 1's to enable #MC for
     * all errors, and AMD docs say much the same.  But, depending
     * perhaps on other config registers, taking machine checks
     * for some errors such as GART TLB errors and master/target
     * aborts may be bad - they set UC and sometime also PCC, but
     * we should not always panic for these error types.
     *
     * Our cms_error_action entry point can suppress such panics,
     * however we can also use the cms_bankctl_val entry point to
     * veto enabling of some of the known villains in the first place.
     */
    if (bank == AMD_MCA_BANK_NB && AUTHAMD_NOGARTTBLWLK_MC(rev))
        val &= ~AMD_NB_EN_GARTTBLWK;

    return (val);
}

/*
 * cms_mca_init entry point.
 */
/*ARGSUSED*/
void
authamd_mca_init(cmi_hdl_t hdl, int nbanks)
{
    authamd_data_t *authamd = cms_hdl_getcmsdata(hdl);
    uint32_t rev = authamd->amd_shared->acs_rev;

    /*
     * On chips with a NB online spare control register take control
     * and clear ECC counts.
     */
    if (AUTHAMD_HAS_ONLINESPARECTL(rev) &&
        authamd_chip_once(authamd, AUTHAMD_CFGONCE_ONLNSPRCFG)) {
        authamd_clear_ecccnt(authamd, B_TRUE);
    }

    /*
     * And since we are claiming the telemetry stop the BIOS receiving
     * an SMI on NB threshold overflow.
     */
    if (AUTHAMD_NBMISC_NUM(rev) &&
        authamd_chip_once(authamd, AUTHAMD_CFGONCE_NBTHRESH)) {
        union mcmsr_nbmisc nbm;
        int i;

        authamd_bankstatus_prewrite(hdl, authamd);

        for (i = 0; i < AUTHAMD_NBMISC_NUM(rev); i++) {
            if (cmi_hdl_rdmsr(hdl, MC_MSR_NB_MISC(i),
                (uint64_t *)&nbm) != CMI_SUCCESS)
                continue;

            if (X86_CHIPREV_ATLEAST(rev, X86_CHIPREV_AMD_F_REV_F) &&
                MCMSR_FIELD_F_revFG(&nbm, mcmisc_Valid) &&
                MCMSR_FIELD_F_revFG(&nbm, mcmisc_CntP)) {
                MCMSR_FIELD_F_revFG(&nbm, mcmisc_IntType) = 0;
            } else if (X86_CHIPREV_ATLEAST(rev,
                X86_CHIPREV_AMD_10_REV_A) &&
                MCMSR_FIELD_10_revAB(&nbm, mcmisc_Valid) &&
                MCMSR_FIELD_10_revAB(&nbm, mcmisc_CntP)) {
                MCMSR_FIELD_10_revAB(&nbm, mcmisc_IntType) = 0;
            }

            (void) cmi_hdl_wrmsr(hdl, MC_MSR_NB_MISC(i),
                MCMSR_VAL(&nbm));
        }

        authamd_bankstatus_postwrite(hdl, authamd);
    }
}

/*
 * cms_bank_logout entry point.
 */
/*ARGSUSED*/
void
authamd_bank_logout(cmi_hdl_t hdl, int bank, uint64_t status,
    uint64_t addr, uint64_t misc, void *mslogout)
{
    authamd_data_t *authamd = cms_hdl_getcmsdata(hdl);
    struct authamd_logout *msl = mslogout;
    uint32_t rev = authamd->amd_shared->acs_rev;

    if (msl == NULL)
        return;

    /*
     * For main memory ECC errors on revisions with an Online Spare
     * Control Register grab the ECC counts by channel and chip-select
     * and reset them to 0.
     */
    if (AUTHAMD_MEMECC_RECOGNISED(rev) &&
        AUTHAMD_IS_MEMECCERR(bank, status) &&
        AUTHAMD_HAS_ONLINESPARECTL(rev)) {
        if (authamd_read_ecccnt(authamd, msl))
            authamd_clear_ecccnt(authamd, B_FALSE);
    }
}

/*
 * cms_error_action entry point
 */

int authamd_forgive_uc = 0; /* For test/debug only */
int authamd_forgive_pcc = 0;    /* For test/debug only */
int authamd_fake_poison = 0;    /* For test/debug only */

/*ARGSUSED*/
uint32_t
authamd_error_action(cmi_hdl_t hdl, int ismc, int bank,
    uint64_t status, uint64_t addr, uint64_t misc, void *mslogout)
{
    authamd_error_disp_t *disp;
    uint32_t rv = 0;

    if (authamd_forgive_uc)
        rv |= CMS_ERRSCOPE_CLEARED_UC;

    if (authamd_forgive_pcc)
        rv |= CMS_ERRSCOPE_CURCONTEXT_OK;

    if (authamd_fake_poison && status & MSR_MC_STATUS_UC)
        rv |= CMS_ERRSCOPE_POISONED;

    if (rv)
        return (rv);

    disp = authamd_disp_match(hdl, bank, status, addr, misc, mslogout);

    if (disp == &authamd_gart_disp) {
        /*
         * GART walk errors set UC and possibly PCC (if source CPU)
         * but should not be regarded as terminal.
         */
        return (CMS_ERRSCOPE_IGNORE_ERR);
    }

    /*
     * May also want to consider master abort and target abort.  These
     * also set UC and PCC (if src CPU) but the requester gets -1
     * and I believe the IO stuff in Solaris will handle that.
     */

    return (rv);
}

/*
 * cms_disp_match entry point
 */
/*ARGSUSED*/
cms_cookie_t
authamd_disp_match(cmi_hdl_t hdl, int bank, uint64_t status,
    uint64_t addr, uint64_t misc, void *mslogout)
{
    authamd_data_t *authamd = cms_hdl_getcmsdata(hdl);
    /* uint16_t errcode = MCAX86_ERRCODE(status); */
    uint16_t exterrcode = AMD_EXT_ERRCODE(status);
    uint32_t rev = authamd->amd_shared->acs_rev;

    /*
     * Recognise main memory ECC errors
     */
    if (AUTHAMD_MEMECC_RECOGNISED(rev) &&
        AUTHAMD_IS_MEMECCERR(bank, status)) {
        if (status & AMD_BANK_STAT_CECC) {
            return (exterrcode == 0 ? &authamd_memce_disp :
                &authamd_ckmemce_disp);
        } else if (status & AMD_BANK_STAT_UECC) {
            return (exterrcode == 0 ? &authamd_memue_disp :
                &authamd_ckmemue_disp);
        }
    }

    /*
     * Recognise GART walk errors
     */
    if (AUTHAMD_NOGARTTBLWLK_MC(rev) && AUTHAMD_IS_GARTERR(bank, status))
        return (&authamd_gart_disp);

    return (NULL);
}

/*
 * cms_ereport_class entry point
 */
/*ARGSUSED*/
void
authamd_ereport_class(cmi_hdl_t hdl, cms_cookie_t mscookie,
    const char **cpuclsp, const char **leafclsp)
{
    const authamd_error_disp_t *aed = mscookie;

    if (aed == NULL)
        return;

    if (aed->aad_subclass != NULL)
        *cpuclsp = aed->aad_subclass;
    if (aed->aad_leafclass != NULL)
        *leafclsp = aed->aad_leafclass;
}

/*ARGSUSED*/
static void
authamd_ereport_add_resource(cmi_hdl_t hdl, authamd_data_t *authamd,
    nvlist_t *ereport, nv_alloc_t *nva, void *mslogout)
{
    nvlist_t *elems[AUTHAMD_DRAM_NCHANNEL * AUTHAMD_DRAM_NCS];
    uint8_t counts[AUTHAMD_DRAM_NCHANNEL * AUTHAMD_DRAM_NCS];
    authamd_logout_t *msl;
    nvlist_t *nvl;
    int nelems = 0;
    int i, chan, cs;

    if ((msl = mslogout) == NULL)
        return;

    for (chan = 0; chan < AUTHAMD_DRAM_NCHANNEL; chan++) {
        for (cs = 0; cs < AUTHAMD_DRAM_NCS; cs++) {
            if (msl->aal_eccerrcnt[chan][cs] == 0)
                continue;

            if ((nvl = fm_nvlist_create(nva)) == NULL)
                continue;

            elems[nelems] = nvl;
            counts[nelems++] = msl->aal_eccerrcnt[chan][cs];

            fm_fmri_hc_set(nvl, FM_HC_SCHEME_VERSION, NULL, NULL, 5,
                "motherboard", 0,
                "chip", authamd->amd_shared->acs_chipid,
                "memory-controller", 0,
                "dram-channel", chan,
                "chip-select", cs);
        }
    }

    if (nelems == 0)
        return;

    fm_payload_set(ereport, FM_EREPORT_GENAMD_PAYLOAD_NAME_RESOURCE,
        DATA_TYPE_NVLIST_ARRAY, nelems, elems,
        NULL);

    fm_payload_set(ereport, FM_EREPORT_GENAMD_PAYLOAD_NAME_RESOURCECNT,
        DATA_TYPE_UINT8_ARRAY, nelems, &counts[0],
        NULL);

    for (i = 0; i < nelems; i++)
        fm_nvlist_destroy(elems[i], nva ? FM_NVA_RETAIN : FM_NVA_FREE);
}

/*
 * cms_ereport_add_logout entry point
 */
/*ARGSUSED*/
void
authamd_ereport_add_logout(cmi_hdl_t hdl, nvlist_t *ereport, nv_alloc_t *nva,
    int bank, uint64_t status, uint64_t addr, uint64_t misc,
    void *mslogout, cms_cookie_t mscookie)
{
    authamd_data_t *authamd = cms_hdl_getcmsdata(hdl);
    const authamd_error_disp_t *aed = mscookie;
    uint64_t members;

    if (aed == NULL)
        return;

    members = aed->aad_ereport_members;

    if (members & FM_EREPORT_GENAMD_PAYLOAD_FLAG_SYND) {
        fm_payload_set(ereport, FM_EREPORT_GENAMD_PAYLOAD_NAME_SYND,
            DATA_TYPE_UINT16, (uint16_t)AMD_BANK_SYND(status),
            NULL);

        if (members & FM_EREPORT_GENAMD_PAYLOAD_FLAG_SYNDTYPE) {
            fm_payload_set(ereport,
                FM_EREPORT_GENAMD_PAYLOAD_NAME_SYNDTYPE,
                DATA_TYPE_STRING, "E",
                NULL);
        }
    }

    if (members & FM_EREPORT_GENAMD_PAYLOAD_FLAG_CKSYND) {
        fm_payload_set(ereport, FM_EREPORT_GENAMD_PAYLOAD_NAME_CKSYND,
            DATA_TYPE_UINT16, (uint16_t)AMD_NB_STAT_CKSYND(status),
            NULL);

        if (members & FM_EREPORT_GENAMD_PAYLOAD_FLAG_SYNDTYPE) {
            fm_payload_set(ereport,
                FM_EREPORT_GENAMD_PAYLOAD_NAME_SYNDTYPE,
                DATA_TYPE_STRING, "C",
                NULL);
        }
    }

    if (members & FM_EREPORT_GENAMD_PAYLOAD_FLAG_RESOURCE &&
        status & MSR_MC_STATUS_ADDRV) {
        authamd_ereport_add_resource(hdl, authamd, ereport, nva,
            mslogout);
    }
}

/*
 * cms_msrinject entry point
 */
cms_errno_t
authamd_msrinject(cmi_hdl_t hdl, uint_t msr, uint64_t val)
{
    authamd_data_t *authamd = cms_hdl_getcmsdata(hdl);
    cms_errno_t rv = CMSERR_BADMSRWRITE;

    authamd_bankstatus_prewrite(hdl, authamd);
    if (cmi_hdl_wrmsr(hdl, msr, val) == CMI_SUCCESS)
        rv = CMS_SUCCESS;
    authamd_bankstatus_postwrite(hdl, authamd);

    return (rv);
}

cms_api_ver_t _cms_api_version = CMS_API_VERSION_0;

const cms_ops_t _cms_ops = {
    authamd_init,           /* cms_init */
    NULL,               /* cms_post_startup */
    NULL,               /* cms_post_mpstartup */
    authamd_logout_size,        /* cms_logout_size */
    authamd_mcgctl_val,     /* cms_mcgctl_val */
    authamd_bankctl_skipinit,   /* cms_bankctl_skipinit */
    authamd_bankctl_val,        /* cms_bankctl_val */
    NULL,               /* cms_bankstatus_skipinit */
    NULL,               /* cms_bankstatus_val */
    authamd_mca_init,       /* cms_mca_init */
    NULL,               /* cms_poll_ownermask */
    authamd_bank_logout,        /* cms_bank_logout */
    authamd_error_action,       /* cms_error_action */
    authamd_disp_match,     /* cms_disp_match */
    authamd_ereport_class,      /* cms_ereport_class */
    NULL,               /* cms_ereport_detector */
    NULL,               /* cms_ereport_includestack */
    authamd_ereport_add_logout, /* cms_ereport_add_logout */
    authamd_msrinject,      /* cms_msrinject */
    NULL,               /* cms_fini */
};

static struct modlcpu modlcpu = {
    &mod_cpuops,
    "Generic AMD model-specific MCA"
};

static struct modlinkage modlinkage = {
    MODREV_1,
    (void *)&modlcpu,
    NULL
};

int
_init(void)
{
    return (mod_install(&modlinkage));
}

int
_info(struct modinfo *modinfop)
{
    return (mod_info(&modlinkage, modinfop));
}

int
_fini(void)
{
    return (mod_remove(&modlinkage));
}