aic79xx_proc.c

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/*
 * Copyright (c) 2000-2001 Adaptec Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 *
 * String handling code courtesy of Gerard Roudier's <[email protected]>
 * sym driver.
 *
 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_proc.c#19 $
 */
#include "aic79xx_osm.h"
#include "aic79xx_inline.h"

static void copy_mem_info(struct info_str *info, char *data, int len);
static int  copy_info(struct info_str *info, char *fmt, ...);
static void ahd_dump_target_state(struct ahd_softc *ahd,
                      struct info_str *info,
                      u_int our_id, char channel,
                      u_int target_id);
static void ahd_dump_device_state(struct info_str *info,
                      struct scsi_device *sdev);
static int  ahd_proc_write_seeprom(struct ahd_softc *ahd,
                       char *buffer, int length);

/*
 * Table of syncrates that don't follow the "divisible by 4"
 * rule. This table will be expanded in future SCSI specs.
 */
static const struct {
    u_int period_factor;
    u_int period;   /* in 100ths of ns */
} scsi_syncrates[] = {
    { 0x08, 625 },  /* FAST-160 */
    { 0x09, 1250 }, /* FAST-80 */
    { 0x0a, 2500 }, /* FAST-40 40MHz */
    { 0x0b, 3030 }, /* FAST-40 33MHz */
    { 0x0c, 5000 }  /* FAST-20 */
};

/*
 * Return the frequency in kHz corresponding to the given
 * sync period factor.
 */
static u_int
ahd_calc_syncsrate(u_int period_factor)
{
    int i;

    /* See if the period is in the "exception" table */
    for (i = 0; i < ARRAY_SIZE(scsi_syncrates); i++) {

        if (period_factor == scsi_syncrates[i].period_factor) {
            /* Period in kHz */
            return (100000000 / scsi_syncrates[i].period);
        }
    }

    /*
     * Wasn't in the table, so use the standard
     * 4 times conversion.
     */
    return (10000000 / (period_factor * 4 * 10));
}


static void
copy_mem_info(struct info_str *info, char *data, int len)
{
    if (info->pos + len > info->offset + info->length)
        len = info->offset + info->length - info->pos;

    if (info->pos + len < info->offset) {
        info->pos += len;
        return;
    }

    if (info->pos < info->offset) {
        off_t partial;

        partial = info->offset - info->pos;
        data += partial;
        info->pos += partial;
        len  -= partial;
    }

    if (len > 0) {
        memcpy(info->buffer, data, len);
        info->pos += len;
        info->buffer += len;
    }
}

static int
copy_info(struct info_str *info, char *fmt, ...)
{
    va_list args;
    char buf[256];
    int len;

    va_start(args, fmt);
    len = vsprintf(buf, fmt, args);
    va_end(args);

    copy_mem_info(info, buf, len);
    return (len);
}

static void
ahd_format_transinfo(struct info_str *info, struct ahd_transinfo *tinfo)
{
    u_int speed;
    u_int freq;
    u_int mb;

    if (tinfo->period == AHD_PERIOD_UNKNOWN) {
        copy_info(info, "Renegotiation Pending\n");
        return;
    }
        speed = 3300;
        freq = 0;
    if (tinfo->offset != 0) {
        freq = ahd_calc_syncsrate(tinfo->period);
        speed = freq;
    }
    speed *= (0x01 << tinfo->width);
        mb = speed / 1000;
        if (mb > 0)
        copy_info(info, "%d.%03dMB/s transfers", mb, speed % 1000);
        else
        copy_info(info, "%dKB/s transfers", speed);

    if (freq != 0) {
        int printed_options;

        printed_options = 0;
        copy_info(info, " (%d.%03dMHz", freq / 1000, freq % 1000);
        if ((tinfo->ppr_options & MSG_EXT_PPR_RD_STRM) != 0) {
            copy_info(info, " RDSTRM");
            printed_options++;
        }
        if ((tinfo->ppr_options & MSG_EXT_PPR_DT_REQ) != 0) {
            copy_info(info, "%s", printed_options ? "|DT" : " DT");
            printed_options++;
        }
        if ((tinfo->ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
            copy_info(info, "%s", printed_options ? "|IU" : " IU");
            printed_options++;
        }
        if ((tinfo->ppr_options & MSG_EXT_PPR_RTI) != 0) {
            copy_info(info, "%s",
                  printed_options ? "|RTI" : " RTI");
            printed_options++;
        }
        if ((tinfo->ppr_options & MSG_EXT_PPR_QAS_REQ) != 0) {
            copy_info(info, "%s",
                  printed_options ? "|QAS" : " QAS");
            printed_options++;
        }
    }

    if (tinfo->width > 0) {
        if (freq != 0) {
            copy_info(info, ", ");
        } else {
            copy_info(info, " (");
        }
        copy_info(info, "%dbit)", 8 * (0x01 << tinfo->width));
    } else if (freq != 0) {
        copy_info(info, ")");
    }
    copy_info(info, "\n");
}

static void
ahd_dump_target_state(struct ahd_softc *ahd, struct info_str *info,
              u_int our_id, char channel, u_int target_id)
{
    struct  scsi_target *starget;
    struct  ahd_initiator_tinfo *tinfo;
    struct  ahd_tmode_tstate *tstate;
    int lun;

    tinfo = ahd_fetch_transinfo(ahd, channel, our_id,
                    target_id, &tstate);
    copy_info(info, "Target %d Negotiation Settings\n", target_id);
    copy_info(info, "\tUser: ");
    ahd_format_transinfo(info, &tinfo->user);
    starget = ahd->platform_data->starget[target_id];
    if (starget == NULL)
        return;

    copy_info(info, "\tGoal: ");
    ahd_format_transinfo(info, &tinfo->goal);
    copy_info(info, "\tCurr: ");
    ahd_format_transinfo(info, &tinfo->curr);

    for (lun = 0; lun < AHD_NUM_LUNS; lun++) {
        struct scsi_device *dev;

        dev = scsi_device_lookup_by_target(starget, lun);

        if (dev == NULL)
            continue;

        ahd_dump_device_state(info, dev);
    }
}

static void
ahd_dump_device_state(struct info_str *info, struct scsi_device *sdev)
{
    struct ahd_linux_device *dev = scsi_transport_device_data(sdev);

    copy_info(info, "\tChannel %c Target %d Lun %d Settings\n",
          sdev->sdev_target->channel + 'A',
          sdev->sdev_target->id, sdev->lun);

    copy_info(info, "\t\tCommands Queued %ld\n", dev->commands_issued);
    copy_info(info, "\t\tCommands Active %d\n", dev->active);
    copy_info(info, "\t\tCommand Openings %d\n", dev->openings);
    copy_info(info, "\t\tMax Tagged Openings %d\n", dev->maxtags);
    copy_info(info, "\t\tDevice Queue Frozen Count %d\n", dev->qfrozen);
}

static int
ahd_proc_write_seeprom(struct ahd_softc *ahd, char *buffer, int length)
{
    ahd_mode_state saved_modes;
    int have_seeprom;
    u_long s;
    int paused;
    int written;

    /* Default to failure. */
    written = -EINVAL;
    ahd_lock(ahd, &s);
    paused = ahd_is_paused(ahd);
    if (!paused)
        ahd_pause(ahd);

    saved_modes = ahd_save_modes(ahd);
    ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
    if (length != sizeof(struct seeprom_config)) {
        printk("ahd_proc_write_seeprom: incorrect buffer size\n");
        goto done;
    }

    have_seeprom = ahd_verify_cksum((struct seeprom_config*)buffer);
    if (have_seeprom == 0) {
        printk("ahd_proc_write_seeprom: cksum verification failed\n");
        goto done;
    }

    have_seeprom = ahd_acquire_seeprom(ahd);
    if (!have_seeprom) {
        printk("ahd_proc_write_seeprom: No Serial EEPROM\n");
        goto done;
    } else {
        u_int start_addr;

        if (ahd->seep_config == NULL) {
            ahd->seep_config = kmalloc(sizeof(*ahd->seep_config), GFP_ATOMIC);
            if (ahd->seep_config == NULL) {
                printk("aic79xx: Unable to allocate serial "
                       "eeprom buffer.  Write failing\n");
                goto done;
            }
        }
        printk("aic79xx: Writing Serial EEPROM\n");
        start_addr = 32 * (ahd->channel - 'A');
        ahd_write_seeprom(ahd, (u_int16_t *)buffer, start_addr,
                  sizeof(struct seeprom_config)/2);
        ahd_read_seeprom(ahd, (uint16_t *)ahd->seep_config,
                 start_addr, sizeof(struct seeprom_config)/2,
                 /*ByteStream*/FALSE);
        ahd_release_seeprom(ahd);
        written = length;
    }

done:
    ahd_restore_modes(ahd, saved_modes);
    if (!paused)
        ahd_unpause(ahd);
    ahd_unlock(ahd, &s);
    return (written);
}
/*
 * Return information to handle /proc support for the driver.
 */
int
ahd_linux_proc_info(struct Scsi_Host *shost, char *buffer, char **start,
            off_t offset, int length, int inout)
{
    struct  ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
    struct  info_str info;
    char    ahd_info[256];
    u_int   max_targ;
    u_int   i;
    int retval;

     /* Has data been written to the file? */ 
    if (inout == TRUE) {
        retval = ahd_proc_write_seeprom(ahd, buffer, length);
        goto done;
    }

    if (start)
        *start = buffer;

    info.buffer = buffer;
    info.length = length;
    info.offset = offset;
    info.pos    = 0;

    copy_info(&info, "Adaptec AIC79xx driver version: %s\n",
          AIC79XX_DRIVER_VERSION);
    copy_info(&info, "%s\n", ahd->description);
    ahd_controller_info(ahd, ahd_info);
    copy_info(&info, "%s\n", ahd_info);
    copy_info(&info, "Allocated SCBs: %d, SG List Length: %d\n\n",
          ahd->scb_data.numscbs, AHD_NSEG);

    max_targ = 16;

    if (ahd->seep_config == NULL)
        copy_info(&info, "No Serial EEPROM\n");
    else {
        copy_info(&info, "Serial EEPROM:\n");
        for (i = 0; i < sizeof(*ahd->seep_config)/2; i++) {
            if (((i % 8) == 0) && (i != 0)) {
                copy_info(&info, "\n");
            }
            copy_info(&info, "0x%.4x ",
                  ((uint16_t*)ahd->seep_config)[i]);
        }
        copy_info(&info, "\n");
    }
    copy_info(&info, "\n");

    if ((ahd->features & AHD_WIDE) == 0)
        max_targ = 8;

    for (i = 0; i < max_targ; i++) {

        ahd_dump_target_state(ahd, &info, ahd->our_id, 'A',
                      /*target_id*/i);
    }
    retval = info.pos > info.offset ? info.pos - info.offset : 0;
done:
    return (retval);
}