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_printf(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_printf(m, " RDSTRM");
 123                         printed_options++;
 124                 }
 125                 if ((tinfo->ppr_options & MSG_EXT_PPR_DT_REQ) != 0) {
 126                         seq_printf(m, "%s", printed_options ? "|DT" : " DT");
 127                         printed_options++;
 128                 }
 129                 if ((tinfo->ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
 130                         seq_printf(m, "%s", printed_options ? "|IU" : " IU");
 131                         printed_options++;
 132                 }
 133                 if ((tinfo->ppr_options & MSG_EXT_PPR_RTI) != 0) {
 134                         seq_printf(m, "%s",
 135                                   printed_options ? "|RTI" : " RTI");
 136                         printed_options++;
 137                 }
 138                 if ((tinfo->ppr_options & MSG_EXT_PPR_QAS_REQ) != 0) {
 139                         seq_printf(m, "%s",
 140                                   printed_options ? "|QAS" : " QAS");
 141                         printed_options++;
 142                 }
 143         }
 144
 145         if (tinfo->width > 0) {
 146                 if (freq != 0) {
 147                         seq_printf(m, ", ");
 148                 } else {
 149                         seq_printf(m, " (");
 150                 }
 151                 seq_printf(m, "%dbit)", 8 * (0x01 << tinfo->width));
 152         } else if (freq != 0) {
 153                 seq_printf(m, ")");
 154         }
 155         seq_printf(m, "\n");
 156 }
 157
 158 static void
 159 ahd_dump_target_state(struct ahd_softc *ahd, struct seq_file *m,
 160                       u_int our_id, char channel, u_int target_id)
 161 {
 162         struct  scsi_target *starget;
 163         struct  ahd_initiator_tinfo *tinfo;
 164         struct  ahd_tmode_tstate *tstate;
 165         int     lun;
 166
 167         tinfo = ahd_fetch_transinfo(ahd, channel, our_id,
 168                                     target_id, &tstate);
 169         seq_printf(m, "Target %d Negotiation Settings\n", target_id);
 170         seq_printf(m, "\tUser: ");
 171         ahd_format_transinfo(m, &tinfo->user);
 172         starget = ahd->platform_data->starget[target_id];
 173         if (starget == NULL)
 174                 return;
 175
 176         seq_printf(m, "\tGoal: ");
 177         ahd_format_transinfo(m, &tinfo->goal);
 178         seq_printf(m, "\tCurr: ");
 179         ahd_format_transinfo(m, &tinfo->curr);
 180
 181         for (lun = 0; lun < AHD_NUM_LUNS; lun++) {
 182                 struct scsi_device *dev;
 183
 184                 dev = scsi_device_lookup_by_target(starget, lun);
 185
 186                 if (dev == NULL)
 187                         continue;
 188
 189                 ahd_dump_device_state(m, dev);
 190         }
 191 }
 192
 193 static void
 194 ahd_dump_device_state(struct seq_file *m, struct scsi_device *sdev)
 195 {
 196         struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
 197
 198         seq_printf(m, "\tChannel %c Target %d Lun %d Settings\n",
 199                   sdev->sdev_target->channel + 'A',
 200                    sdev->sdev_target->id, (u8)sdev->lun);
 201
 202         seq_printf(m, "\t\tCommands Queued %ld\n", dev->commands_issued);
 203         seq_printf(m, "\t\tCommands Active %d\n", dev->active);
 204         seq_printf(m, "\t\tCommand Openings %d\n", dev->openings);
 205         seq_printf(m, "\t\tMax Tagged Openings %d\n", dev->maxtags);
 206         seq_printf(m, "\t\tDevice Queue Frozen Count %d\n", dev->qfrozen);
 207 }
 208
 209 int
 210 ahd_proc_write_seeprom(struct Scsi_Host *shost, char *buffer, int length)
 211 {
 212         struct  ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
 213         ahd_mode_state saved_modes;
 214         int have_seeprom;
 215         u_long s;
 216         int paused;
 217         int written;
 218
 219         /* Default to failure. */
 220         written = -EINVAL;
 221         ahd_lock(ahd, &s);
 222         paused = ahd_is_paused(ahd);
 223         if (!paused)
 224                 ahd_pause(ahd);
 225
 226         saved_modes = ahd_save_modes(ahd);
 227         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
 228         if (length != sizeof(struct seeprom_config)) {
 229                 printk("ahd_proc_write_seeprom: incorrect buffer size\n");
 230                 goto done;
 231         }
 232
 233         have_seeprom = ahd_verify_cksum((struct seeprom_config*)buffer);
 234         if (have_seeprom == 0) {
 235                 printk("ahd_proc_write_seeprom: cksum verification failed\n");
 236                 goto done;
 237         }
 238
 239         have_seeprom = ahd_acquire_seeprom(ahd);
 240         if (!have_seeprom) {
 241                 printk("ahd_proc_write_seeprom: No Serial EEPROM\n");
 242                 goto done;
 243         } else {
 244                 u_int start_addr;
 245
 246                 if (ahd->seep_config == NULL) {
 247                         ahd->seep_config = kmalloc(sizeof(*ahd->seep_config), GFP_ATOMIC);
 248                         if (ahd->seep_config == NULL) {
 249                                 printk("aic79xx: Unable to allocate serial "
 250                                        "eeprom buffer.  Write failing\n");
 251                                 goto done;
 252                         }
 253                 }
 254                 printk("aic79xx: Writing Serial EEPROM\n");
 255                 start_addr = 32 * (ahd->channel - 'A');
 256                 ahd_write_seeprom(ahd, (u_int16_t *)buffer, start_addr,
 257                                   sizeof(struct seeprom_config)/2);
 258                 ahd_read_seeprom(ahd, (uint16_t *)ahd->seep_config,
 259                                  start_addr, sizeof(struct seeprom_config)/2,
 260                                  /*ByteStream*/FALSE);
 261                 ahd_release_seeprom(ahd);
 262                 written = length;
 263         }
 264
 265 done:
 266         ahd_restore_modes(ahd, saved_modes);
 267         if (!paused)
 268                 ahd_unpause(ahd);
 269         ahd_unlock(ahd, &s);
 270         return (written);
 271 }
 272 /*
 273  * Return information to handle /proc support for the driver.
 274  */
 275 int
 276 ahd_linux_show_info(struct seq_file *m, struct Scsi_Host *shost)
 277 {
 278         struct  ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
 279         char    ahd_info[256];
 280         u_int   max_targ;
 281         u_int   i;
 282
 283         seq_printf(m, "Adaptec AIC79xx driver version: %s\n",
 284                   AIC79XX_DRIVER_VERSION);
 285         seq_printf(m, "%s\n", ahd->description);
 286         ahd_controller_info(ahd, ahd_info);
 287         seq_printf(m, "%s\n", ahd_info);
 288         seq_printf(m, "Allocated SCBs: %d, SG List Length: %d\n\n",
 289                   ahd->scb_data.numscbs, AHD_NSEG);
 290
 291         max_targ = 16;
 292
 293         if (ahd->seep_config == NULL)
 294                 seq_printf(m, "No Serial EEPROM\n");
 295         else {
 296                 seq_printf(m, "Serial EEPROM:\n");
 297                 for (i = 0; i < sizeof(*ahd->seep_config)/2; i++) {
 298                         if (((i % 8) == 0) && (i != 0)) {
 299                                 seq_printf(m, "\n");
 300                         }
 301                         seq_printf(m, "0x%.4x ",
 302                                   ((uint16_t*)ahd->seep_config)[i]);
 303                 }
 304                 seq_printf(m, "\n");
 305         }
 306         seq_printf(m, "\n");
 307
 308         if ((ahd->features & AHD_WIDE) == 0)
 309                 max_targ = 8;
 310
 311         for (i = 0; i < max_targ; i++) {
 312
 313                 ahd_dump_target_state(ahd, m, ahd->our_id, 'A',
 314                                       /*target_id*/i);
 315         }
 316         return 0;
 317 }