common/devid/devid_smp.c

96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne/*
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * CDDL HEADER START
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne *
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * The contents of this file are subject to the terms of the
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * Common Development and Distribution License (the "License").
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * You may not use this file except in compliance with the License.
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne *
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * or http://www.opensolaris.org/os/licensing.
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * See the License for the specific language governing permissions
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * and limitations under the License.
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne *
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * When distributing Covered Code, include this CDDL HEADER in each
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * If applicable, add the following below this CDDL HEADER, with the
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * fields enclosed by brackets "[]" replaced with your own identifying
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * information: Portions Copyright [yyyy] [name of copyright owner]
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne *
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * CDDL HEADER END
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne/*
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * Use is subject to license terms.
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne/*
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * These functions are used to encode SAS SMP address data into
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * Solaris devid / guid values.
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne#ifndef _KERNEL
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne#include <stdio.h>
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne#endif /* _KERNEL */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne#include <sys/inttypes.h>
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne#include <sys/types.h>
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne#include <sys/stropts.h>
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne#include <sys/debug.h>
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne#include <sys/isa_defs.h>
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne#include <sys/dditypes.h>
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne#include <sys/ddi_impldefs.h>
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne#include <sys/scsi/scsi.h>
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne#include <sys/scsi/generic/smp_frames.h>
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne#ifndef _KERNEL
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne#include <sys/libdevid.h>
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne#endif /* !_KERNEL */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne#include "devid_impl.h"
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne/*
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * Typically the wwnstr makes a good devid, however in some cases the wwnstr
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * comes form the location of a FRU in the chassis instead of from the identity
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * of the FRU.  The table below provides vid/pid information for such cases.
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * These vidpid strings are matched against smp_report_manufacturer_info_resp
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * data. When a match occurs the srmir_vs_52 field, if non-zero, is used
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * to form the devid.
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Hornechar *vidpid_devid_from_srmir_vs_52[] = {
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne/*  "                  111111" */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne/*  "012345670123456789012345" */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne/*  "|-VID--||-----PID------|" */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    "SUN     GENESIS",
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    NULL
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne};
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne/*
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne *    Function: ddi_/devid_smp_encode
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne *
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * Description: This routine finds and encodes a unique devid given the
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne *      SAS address of an SMP node.
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne *
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne *   Arguments: version - id encode algorithm version
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne *      driver_name - binding driver name (if ! known use NULL)
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne *      wwnstr - smp SAS address in wwnstr (unit-address) form.
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne *      srmir_buf - REPORT MANUFACTURER INFORMATION response.
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne *      srmir_len - amount of srmir_buf data.
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne *      devid - id returned
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne *
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne * Return Code: DEVID_SUCCESS - success
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne *      DEVID_FAILURE - failure
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horneint
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne#ifdef _KERNEL
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horneddi_devid_smp_encode(
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne#else /* ! _KERNEL */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Hornedevid_smp_encode(
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne#endif /* _KERNEL */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    int version,    /* IN */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    char *driver_name,  /* IN */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    char *wwnstr,   /* IN */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    uchar_t *srmir_buf, /* IN */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    size_t srmir_len,   /* IN */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    ddi_devid_t *devid) /* OUT */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne{
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    uint64_t                wwn;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    ushort_t                raw_id_type;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    ushort_t                raw_id_len;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    impl_devid_t                *i_devid;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    int                 i_devid_len;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    int                 i;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    smp_response_frame_t            *srs;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    smp_report_manufacturer_info_resp_t *srmir;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    char                    **vidpid;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    uint8_t                 *vsp;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    uint64_t                s;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    char                    sbuf[16 + 1];
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    int                 vlen, plen, slen;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    int                 driver_name_len = 0;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    DEVID_ASSERT(devid != NULL);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    *devid = NULL;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    /* verify valid version */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    if (version > DEVID_SMP_ENCODE_VERSION_LATEST)
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        return (DEVID_FAILURE);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    if (wwnstr == NULL)
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        return (DEVID_FAILURE);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    /* convert wwnstr to binary */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    if (scsi_wwnstr_to_wwn(wwnstr, &wwn) != DDI_SUCCESS)
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        return (DEVID_FAILURE);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    if (srmir_buf &&
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        (srmir_len >= ((sizeof (*srs) - sizeof (srs->srf_data)) +
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        sizeof (*srmir)))) {
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        srs = (smp_response_frame_t *)srmir_buf;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        srmir = (smp_report_manufacturer_info_resp_t *)srs->srf_data;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        for (vidpid = vidpid_devid_from_srmir_vs_52; *vidpid; vidpid++)
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            if (strncmp(srmir->srmir_vendor_identification,
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne                *vidpid, strlen(*vidpid)) == 0)
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne                break;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        /* no vid/pid match, use wwn for devid */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        if (*vidpid == NULL)
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            goto usewwn;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        /* extract the special vendor-specific 'devid serial number' */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        vsp = &srmir->srmir_vs_52[0];
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        s = ((uint64_t)vsp[0] << 56) |
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            ((uint64_t)vsp[1] << 48) |
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            ((uint64_t)vsp[2] << 40) |
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            ((uint64_t)vsp[3] << 32) |
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            ((uint64_t)vsp[4] << 24) |
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            ((uint64_t)vsp[5] << 16) |
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            ((uint64_t)vsp[6] <<  8) |
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            ((uint64_t)vsp[7]);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        /* discount zero value */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        if (s == 0)
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            goto usewwn;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        /* compute length (with trailing spaces removed) */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        vlen = scsi_ascii_inquiry_len(
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            srmir->srmir_vendor_identification,
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            sizeof (srmir->srmir_vendor_identification));
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        plen = scsi_ascii_inquiry_len(
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            srmir->srmir_product_identification,
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            sizeof (srmir->srmir_product_identification));
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        slen = snprintf(sbuf, sizeof (sbuf), "%016" PRIx64, s);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        if ((vlen <= 0) || (plen <= 0) || ((slen + 1) != sizeof (sbuf)))
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            goto usewwn;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        /* this is most like a devid formed from inquiry data */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        raw_id_type = DEVID_SCSI_SERIAL;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        raw_id_len = vlen + 1 + plen + 1 + slen;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        i_devid_len = sizeof (*i_devid) +
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            raw_id_len - sizeof (i_devid->did_id);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        if ((i_devid = DEVID_MALLOC(i_devid_len)) == NULL)
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            return (DEVID_FAILURE);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        bzero(i_devid, i_devid_len);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        /* copy the vid to the beginning */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        bcopy(&srmir->srmir_vendor_identification,
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            &i_devid->did_id[0], vlen);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        i_devid->did_id[vlen] = '.';
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        /* copy the pid after the "vid." */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        bcopy(&srmir->srmir_product_identification,
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            &i_devid->did_id[vlen + 1], plen);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        i_devid->did_id[vlen + 1 + plen] = '.';
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        /* place the 'devid serial number' buffer the "vid.pid." */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        bcopy(sbuf, &i_devid->did_id[vlen + 1 + plen + 1], slen);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    } else {
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horneusewwn:     raw_id_type = DEVID_SCSI3_WWN;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        raw_id_len = sizeof (wwn);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        i_devid_len = sizeof (*i_devid) +
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            raw_id_len - sizeof (i_devid->did_id);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        if ((i_devid = DEVID_MALLOC(i_devid_len)) == NULL)
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            return (DEVID_FAILURE);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        bzero(i_devid, i_devid_len);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        /* binary devid stores wwn bytes in big-endian order */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        for (i = 0; i < sizeof (wwn); i++)
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            i_devid->did_id[i] =
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne                (wwn >> ((sizeof (wwn) * 8) -
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne                ((i + 1) * 8))) & 0xFF;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    }
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    i_devid->did_magic_hi = DEVID_MAGIC_MSB;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    i_devid->did_magic_lo = DEVID_MAGIC_LSB;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    i_devid->did_rev_hi = DEVID_REV_MSB;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    i_devid->did_rev_lo = DEVID_REV_LSB;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    DEVID_FORMTYPE(i_devid, raw_id_type);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    DEVID_FORMLEN(i_devid, raw_id_len);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    /* fill in driver name hint */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    bzero(i_devid->did_driver, DEVID_HINT_SIZE);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    if (driver_name != NULL) {
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        driver_name_len = strlen(driver_name);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        if (driver_name_len > DEVID_HINT_SIZE) {
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            /* pick up last four characters of driver name */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            driver_name += driver_name_len - DEVID_HINT_SIZE;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne            driver_name_len = DEVID_HINT_SIZE;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        }
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne        bcopy(driver_name, i_devid->did_driver, driver_name_len);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    }
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    /* return device id */
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    *devid = (ddi_devid_t)i_devid;
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne    return (DEVID_SUCCESS);
96c4a178a18cd52ee5001195f1552d9cef0c38f0Chris Horne}