aic7xxx_proc.c

Go to the documentation of this file.

/*
 * 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/aic7xxx_proc.c#29 $
 */
#include "aic7xxx_osm.h"
#include "aic7xxx_inline.h"
#include "aic7xxx_93cx6.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 ahc_dump_target_state(struct ahc_softc *ahc,
                      struct info_str *info,
                      u_int our_id, char channel,
                      u_int target_id, u_int target_offset);
static void ahc_dump_device_state(struct info_str *info,
                      struct scsi_device *dev);
static int  ahc_proc_write_seeprom(struct ahc_softc *ahc,
                       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
ahc_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
ahc_format_transinfo(struct info_str *info, struct ahc_transinfo *tinfo)
{
    u_int speed;
    u_int freq;
    u_int mb;

        speed = 3300;
        freq = 0;
    if (tinfo->offset != 0) {
        freq = ahc_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) {
        copy_info(info, " (%d.%03dMHz%s, offset %d",
             freq / 1000, freq % 1000,
             (tinfo->ppr_options & MSG_EXT_PPR_DT_REQ) != 0
             ? " DT" : "", tinfo->offset);
    }

    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
ahc_dump_target_state(struct ahc_softc *ahc, struct info_str *info,
              u_int our_id, char channel, u_int target_id,
              u_int target_offset)
{
    struct  scsi_target *starget;
    struct  ahc_initiator_tinfo *tinfo;
    struct  ahc_tmode_tstate *tstate;
    int lun;

    tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
                    target_id, &tstate);
    if ((ahc->features & AHC_TWIN) != 0)
        copy_info(info, "Channel %c ", channel);
    copy_info(info, "Target %d Negotiation Settings\n", target_id);
    copy_info(info, "\tUser: ");
    ahc_format_transinfo(info, &tinfo->user);
    starget = ahc->platform_data->starget[target_offset];
    if (!starget)
        return;

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

    for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
        struct scsi_device *sdev;

        sdev = scsi_device_lookup_by_target(starget, lun);

        if (sdev == NULL)
            continue;

        ahc_dump_device_state(info, sdev);
    }
}

static void
ahc_dump_device_state(struct info_str *info, struct scsi_device *sdev)
{
    struct ahc_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
ahc_proc_write_seeprom(struct ahc_softc *ahc, char *buffer, int length)
{
    struct seeprom_descriptor sd;
    int have_seeprom;
    u_long s;
    int paused;
    int written;

    /* Default to failure. */
    written = -EINVAL;
    ahc_lock(ahc, &s);
    paused = ahc_is_paused(ahc);
    if (!paused)
        ahc_pause(ahc);

    if (length != sizeof(struct seeprom_config)) {
        printk("ahc_proc_write_seeprom: incorrect buffer size\n");
        goto done;
    }

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

    sd.sd_ahc = ahc;
#if AHC_PCI_CONFIG > 0
    if ((ahc->chip & AHC_PCI) != 0) {
        sd.sd_control_offset = SEECTL;
        sd.sd_status_offset = SEECTL;
        sd.sd_dataout_offset = SEECTL;
        if (ahc->flags & AHC_LARGE_SEEPROM)
            sd.sd_chip = C56_66;
        else
            sd.sd_chip = C46;
        sd.sd_MS = SEEMS;
        sd.sd_RDY = SEERDY;
        sd.sd_CS = SEECS;
        sd.sd_CK = SEECK;
        sd.sd_DO = SEEDO;
        sd.sd_DI = SEEDI;
        have_seeprom = ahc_acquire_seeprom(ahc, &sd);
    } else
#endif
    if ((ahc->chip & AHC_VL) != 0) {
        sd.sd_control_offset = SEECTL_2840;
        sd.sd_status_offset = STATUS_2840;
        sd.sd_dataout_offset = STATUS_2840;     
        sd.sd_chip = C46;
        sd.sd_MS = 0;
        sd.sd_RDY = EEPROM_TF;
        sd.sd_CS = CS_2840;
        sd.sd_CK = CK_2840;
        sd.sd_DO = DO_2840;
        sd.sd_DI = DI_2840;
        have_seeprom = TRUE;
    } else {
        printk("ahc_proc_write_seeprom: unsupported adapter type\n");
        goto done;
    }

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

        if (ahc->seep_config == NULL) {
            ahc->seep_config = kmalloc(sizeof(*ahc->seep_config), GFP_ATOMIC);
            if (ahc->seep_config == NULL) {
                printk("aic7xxx: Unable to allocate serial "
                       "eeprom buffer.  Write failing\n");
                goto done;
            }
        }
        printk("aic7xxx: Writing Serial EEPROM\n");
        start_addr = 32 * (ahc->channel - 'A');
        ahc_write_seeprom(&sd, (u_int16_t *)buffer, start_addr,
                  sizeof(struct seeprom_config)/2);
        ahc_read_seeprom(&sd, (uint16_t *)ahc->seep_config,
                 start_addr, sizeof(struct seeprom_config)/2);
#if AHC_PCI_CONFIG > 0
        if ((ahc->chip & AHC_VL) == 0)
            ahc_release_seeprom(&sd);
#endif
        written = length;
    }

done:
    if (!paused)
        ahc_unpause(ahc);
    ahc_unlock(ahc, &s);
    return (written);
}

/*
 * Return information to handle /proc support for the driver.
 */
int
ahc_linux_proc_info(struct Scsi_Host *shost, char *buffer, char **start,
            off_t offset, int length, int inout)
{
    struct  ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
    struct  info_str info;
    char    ahc_info[256];
    u_int   max_targ;
    u_int   i;
    int retval;

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

    if (start)
        *start = buffer;

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

    copy_info(&info, "Adaptec AIC7xxx driver version: %s\n",
          AIC7XXX_DRIVER_VERSION);
    copy_info(&info, "%s\n", ahc->description);
    ahc_controller_info(ahc, ahc_info);
    copy_info(&info, "%s\n", ahc_info);
    copy_info(&info, "Allocated SCBs: %d, SG List Length: %d\n\n",
          ahc->scb_data->numscbs, AHC_NSEG);


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

    max_targ = 16;
    if ((ahc->features & (AHC_WIDE|AHC_TWIN)) == 0)
        max_targ = 8;

    for (i = 0; i < max_targ; i++) {
        u_int our_id;
        u_int target_id;
        char channel;

        channel = 'A';
        our_id = ahc->our_id;
        target_id = i;
        if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
            channel = 'B';
            our_id = ahc->our_id_b;
            target_id = i % 8;
        }

        ahc_dump_target_state(ahc, &info, our_id,
                      channel, target_id, i);
    }
    retval = info.pos > info.offset ? info.pos - info.offset : 0;
done:
    return (retval);
}