kernel/drivers/scsi/aic7xxx/aic79xx_proc.c

   1 /*
   2  * Copyright (c) 2000-2001 Adaptec Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions, and the following disclaimer,
  10  *    without modification.
  11  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  12  *    substantially similar to the "NO WARRANTY" disclaimer below
  13  *    ("Disclaimer") and any redistribution must be conditioned upon
  14  *    including a substantially similar Disclaimer requirement for further
  15  *    binary redistribution.
  16  * 3. Neither the names of the above-listed copyright holders nor the names
  17  *    of any contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * Alternatively, this software may be distributed under the terms of the
  21  * GNU General Public License ("GPL") version 2 as published by the Free
  22  * Software Foundation.
  23  *
  24  * NO WARRANTY
  25  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  26  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  27  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  28  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  29  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  33  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  34  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGES.
  36  *
  37  * String handling code courtesy of Gerard Roudier's <groudier@club-internet.fr>
  38  * sym driver.
  39  *
  40  * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_proc.c#19 $
  41  */
  42 #include "aic79xx_osm.h"
  43 #include "aic79xx_inline.h"
  44
  45 static void     ahd_dump_target_state(struct ahd_softc *ahd,
  46                                       struct seq_file *m,
  47                                       u_int our_id, char channel,
  48                                       u_int target_id);
  49 static void     ahd_dump_device_state(struct seq_file *m,
  50                                       struct scsi_device *sdev);
  51
  52 /*
  53  * Table of syncrates that don't follow the "divisible by 4"
  54  * rule. This table will be expanded in future SCSI specs.
  55  */
  56 static const struct {
  57         u_int period_factor;
  58         u_int period;   /* in 100ths of ns */
  59 } scsi_syncrates[] = {
  60         { 0x08, 625 },  /* FAST-160 */
  61         { 0x09, 1250 }, /* FAST-80 */
  62         { 0x0a, 2500 }, /* FAST-40 40MHz */
  63         { 0x0b, 3030 }, /* FAST-40 33MHz */
  64         { 0x0c, 5000 }  /* FAST-20 */
  65 };
  66
  67 /*
  68  * Return the frequency in kHz corresponding to the given
  69  * sync period factor.
  70  */
  71 static u_int
  72 ahd_calc_syncsrate(u_int period_factor)
  73 {
  74         int i;
  75
  76         /* See if the period is in the "exception" table */
  77         for (i = 0; i < ARRAY_SIZE(scsi_syncrates); i++) {
  78
  79                 if (period_factor == scsi_syncrates[i].period_factor) {
  80                         /* Period in kHz */
  81                         return (100000000 / scsi_syncrates[i].period);
  82                 }
  83         }
  84
  85         /*
  86          * Wasn't in the table, so use the standard
  87          * 4 times conversion.
  88          */
  89         return (10000000 / (period_factor * 4 * 10));
  90 }
  91
  92 static void
  93 ahd_format_transinfo(struct seq_file *m, struct ahd_transinfo *tinfo)
  94 {
  95         u_int speed;
  96         u_int freq;
  97         u_int mb;
  98
  99         if (tinfo->period == AHD_PERIOD_UNKNOWN) {
 100                 seq_puts(m, "Renegotiation Pending\n");
 101                 return;
 102         }
 103         speed = 3300;
 104         freq = 0;
 105         if (tinfo->offset != 0) {
 106                 freq = ahd_calc_syncsrate(tinfo->period);
 107                 speed = freq;
 108         }
 109         speed *= (0x01 << tinfo->width);
 110         mb = speed / 1000;
 111         if (mb > 0)
 112                 seq_printf(m, "%d.%03dMB/s transfers", mb, speed % 1000);
 113         else
 114                 seq_printf(m, "%dKB/s transfers", speed);
 115
 116         if (freq != 0) {
 117                 int     printed_options;
 118
 119                 printed_options = 0;
 120                 seq_printf(m, " (%d.%03dMHz", freq / 1000, freq % 1000);
 121                 if ((tinfo->ppr_options & MSG_EXT_PPR_RD_STRM) != 0) {
 122                         seq_puts(m, " RDSTRM");
 123                         printed_options++;
 124                 }
 125                 if ((tinfo->ppr_options & MSG_EXT_PPR_DT_REQ) != 0) {
 126                         seq_puts(m, printed_options ? "|DT" : " DT");
 127                         printed_options++;
 128                 }
 129                 if ((tinfo->ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
 130                         seq_puts(m, printed_options ? "|IU" : " IU");
 131                         printed_options++;
 132                 }
 133                 if ((tinfo->ppr_options & MSG_EXT_PPR_RTI) != 0) {
 134                         seq_puts(m, printed_options ? "|RTI" : " RTI");
 135                         printed_options++;
 136                 }
 137                 if ((tinfo->ppr_options & MSG_EXT_PPR_QAS_REQ) != 0) {
 138                         seq_puts(m, printed_options ? "|QAS" : " QAS");
 139                         printed_options++;
 140                 }
 141         }
 142
 143         if (tinfo->width > 0) {
 144                 if (freq != 0) {
 145                         seq_puts(m, ", ");
 146                 } else {
 147                         seq_puts(m, " (");
 148                 }
 149                 seq_printf(m, "%dbit)", 8 * (0x01 << tinfo->width));
 150         } else if (freq != 0) {
 151                 seq_putc(m, ')');
 152         }
 153         seq_putc(m, '\n');
 154 }
 155
 156 static void
 157 ahd_dump_target_state(struct ahd_softc *ahd, struct seq_file *m,
 158                       u_int our_id, char channel, u_int target_id)
 159 {
 160         struct  scsi_target *starget;
 161         struct  ahd_initiator_tinfo *tinfo;
 162         struct  ahd_tmode_tstate *tstate;
 163         int     lun;
 164
 165         tinfo = ahd_fetch_transinfo(ahd, channel, our_id,
 166                                     target_id, &tstate);
 167         seq_printf(m, "Target %d Negotiation Settings\n", target_id);
 168         seq_puts(m, "\tUser: ");
 169         ahd_format_transinfo(m, &tinfo->user);
 170         starget = ahd->platform_data->starget[target_id];
 171         if (starget == NULL)
 172                 return;
 173
 174         seq_puts(m, "\tGoal: ");
 175         ahd_format_transinfo(m, &tinfo->goal);
 176         seq_puts(m, "\tCurr: ");
 177         ahd_format_transinfo(m, &tinfo->curr);
 178
 179         for (lun = 0; lun < AHD_NUM_LUNS; lun++) {
 180                 struct scsi_device *dev;
 181
 182                 dev = scsi_device_lookup_by_target(starget, lun);
 183
 184                 if (dev == NULL)
 185                         continue;
 186
 187                 ahd_dump_device_state(m, dev);
 188         }
 189 }
 190
 191 static void
 192 ahd_dump_device_state(struct seq_file *m, struct scsi_device *sdev)
 193 {
 194         struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
 195
 196         seq_printf(m, "\tChannel %c Target %d Lun %d Settings\n",
 197                   sdev->sdev_target->channel + 'A',
 198                    sdev->sdev_target->id, (u8)sdev->lun);
 199
 200         seq_printf(m, "\t\tCommands Queued %ld\n", dev->commands_issued);
 201         seq_printf(m, "\t\tCommands Active %d\n", dev->active);
 202         seq_printf(m, "\t\tCommand Openings %d\n", dev->openings);
 203         seq_printf(m, "\t\tMax Tagged Openings %d\n", dev->maxtags);
 204         seq_printf(m, "\t\tDevice Queue Frozen Count %d\n", dev->qfrozen);
 205 }
 206
 207 int
 208 ahd_proc_write_seeprom(struct Scsi_Host *shost, char *buffer, int length)
 209 {
 210         struct  ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
 211         ahd_mode_state saved_modes;
 212         int have_seeprom;
 213         u_long s;
 214         int paused;
 215         int written;
 216
 217         /* Default to failure. */
 218         written = -EINVAL;
 219         ahd_lock(ahd, &s);
 220         paused = ahd_is_paused(ahd);
 221         if (!paused)
 222                 ahd_pause(ahd);
 223
 224         saved_modes = ahd_save_modes(ahd);
 225         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
 226         if (length != sizeof(struct seeprom_config)) {
 227                 printk("ahd_proc_write_seeprom: incorrect buffer size\n");
 228                 goto done;
 229         }
 230
 231         have_seeprom = ahd_verify_cksum((struct seeprom_config*)buffer);
 232         if (have_seeprom == 0) {
 233                 printk("ahd_proc_write_seeprom: cksum verification failed\n");
 234                 goto done;
 235         }
 236
 237         have_seeprom = ahd_acquire_seeprom(ahd);
 238         if (!have_seeprom) {
 239                 printk("ahd_proc_write_seeprom: No Serial EEPROM\n");
 240                 goto done;
 241         } else {
 242                 u_int start_addr;
 243
 244                 if (ahd->seep_config == NULL) {
 245                         ahd->seep_config = kmalloc(sizeof(*ahd->seep_config), GFP_ATOMIC);
 246                         if (ahd->seep_config == NULL) {
 247                                 printk("aic79xx: Unable to allocate serial "
 248                                        "eeprom buffer.  Write failing\n");
 249                                 goto done;
 250                         }
 251                 }
 252                 printk("aic79xx: Writing Serial EEPROM\n");
 253                 start_addr = 32 * (ahd->channel - 'A');
 254                 ahd_write_seeprom(ahd, (u_int16_t *)buffer, start_addr,
 255                                   sizeof(struct seeprom_config)/2);
 256                 ahd_read_seeprom(ahd, (uint16_t *)ahd->seep_config,
 257                                  start_addr, sizeof(struct seeprom_config)/2,
 258                                  /*ByteStream*/FALSE);
 259                 ahd_release_seeprom(ahd);
 260                 written = length;
 261         }
 262
 263 done:
 264         ahd_restore_modes(ahd, saved_modes);
 265         if (!paused)
 266                 ahd_unpause(ahd);
 267         ahd_unlock(ahd, &s);
 268         return (written);
 269 }
 270 /*
 271  * Return information to handle /proc support for the driver.
 272  */
 273 int
 274 ahd_linux_show_info(struct seq_file *m, struct Scsi_Host *shost)
 275 {
 276         struct  ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
 277         char    ahd_info[256];
 278         u_int   max_targ;
 279         u_int   i;
 280
 281         seq_printf(m, "Adaptec AIC79xx driver version: %s\n",
 282                   AIC79XX_DRIVER_VERSION);
 283         seq_printf(m, "%s\n", ahd->description);
 284         ahd_controller_info(ahd, ahd_info);
 285         seq_printf(m, "%s\n", ahd_info);
 286         seq_printf(m, "Allocated SCBs: %d, SG List Length: %d\n\n",
 287                   ahd->scb_data.numscbs, AHD_NSEG);
 288
 289         max_targ = 16;
 290
 291         if (ahd->seep_config == NULL)
 292                 seq_puts(m, "No Serial EEPROM\n");
 293         else {
 294                 seq_puts(m, "Serial EEPROM:\n");
 295                 for (i = 0; i < sizeof(*ahd->seep_config)/2; i++) {
 296                         if (((i % 8) == 0) && (i != 0)) {
 297                                 seq_putc(m, '\n');
 298                         }
 299                         seq_printf(m, "0x%.4x ",
 300                                   ((uint16_t*)ahd->seep_config)[i]);
 301                 }
 302                 seq_putc(m, '\n');
 303         }
 304         seq_putc(m, '\n');
 305
 306         if ((ahd->features & AHD_WIDE) == 0)
 307                 max_targ = 8;
 308
 309         for (i = 0; i < max_targ; i++) {
 310
 311                 ahd_dump_target_state(ahd, m, ahd->our_id, 'A',
 312                                       /*target_id*/i);
 313         }
 314         return 0;
 315 }