git.oblomov.eu Git - linux-2.6/blob - 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     copy_mem_info(struct info_str *info, char *data, int len);
  46 static int      copy_info(struct info_str *info, char *fmt, ...);
  47 static void     ahd_dump_target_state(struct ahd_softc *ahd,
  48                                       struct info_str *info,
  49                                       u_int our_id, char channel,
  50                                       u_int target_id, u_int target_offset);
  51 static void     ahd_dump_device_state(struct info_str *info,
  52                                       struct scsi_device *sdev);
  53 static int      ahd_proc_write_seeprom(struct ahd_softc *ahd,
  54                                        char *buffer, int length);
  55
  56 /*
  57  * Table of syncrates that don't follow the "divisible by 4"
  58  * rule. This table will be expanded in future SCSI specs.
  59  */
  60 static struct {
  61         u_int period_factor;
  62         u_int period;   /* in 100ths of ns */
  63 } scsi_syncrates[] = {
  64         { 0x08, 625 },  /* FAST-160 */
  65         { 0x09, 1250 }, /* FAST-80 */
  66         { 0x0a, 2500 }, /* FAST-40 40MHz */
  67         { 0x0b, 3030 }, /* FAST-40 33MHz */
  68         { 0x0c, 5000 }  /* FAST-20 */
  69 };
  70
  71 /*
  72  * Return the frequency in kHz corresponding to the given
  73  * sync period factor.
  74  */
  75 static u_int
  76 ahd_calc_syncsrate(u_int period_factor)
  77 {
  78         int i;
  79         int num_syncrates;
  80
  81         num_syncrates = sizeof(scsi_syncrates) / sizeof(scsi_syncrates[0]);
  82         /* See if the period is in the "exception" table */
  83         for (i = 0; i < num_syncrates; i++) {
  84
  85                 if (period_factor == scsi_syncrates[i].period_factor) {
  86                         /* Period in kHz */
  87                         return (100000000 / scsi_syncrates[i].period);
  88                 }
  89         }
  90
  91         /*
  92          * Wasn't in the table, so use the standard
  93          * 4 times conversion.
  94          */
  95         return (10000000 / (period_factor * 4 * 10));
  96 }
  97
  98
  99 static void
 100 copy_mem_info(struct info_str *info, char *data, int len)
 101 {
 102         if (info->pos + len > info->offset + info->length)
 103                 len = info->offset + info->length - info->pos;
 104
 105         if (info->pos + len < info->offset) {
 106                 info->pos += len;
 107                 return;
 108         }
 109
 110         if (info->pos < info->offset) {
 111                 off_t partial;
 112
 113                 partial = info->offset - info->pos;
 114                 data += partial;
 115                 info->pos += partial;
 116                 len  -= partial;
 117         }
 118
 119         if (len > 0) {
 120                 memcpy(info->buffer, data, len);
 121                 info->pos += len;
 122                 info->buffer += len;
 123         }
 124 }
 125
 126 static int
 127 copy_info(struct info_str *info, char *fmt, ...)
 128 {
 129         va_list args;
 130         char buf[256];
 131         int len;
 132
 133         va_start(args, fmt);
 134         len = vsprintf(buf, fmt, args);
 135         va_end(args);
 136
 137         copy_mem_info(info, buf, len);
 138         return (len);
 139 }
 140
 141 void
 142 ahd_format_transinfo(struct info_str *info, struct ahd_transinfo *tinfo)
 143 {
 144         u_int speed;
 145         u_int freq;
 146         u_int mb;
 147
 148         if (tinfo->period == AHD_PERIOD_UNKNOWN) {
 149                 copy_info(info, "Renegotiation Pending\n");
 150                 return;
 151         }
 152         speed = 3300;
 153         freq = 0;
 154         if (tinfo->offset != 0) {
 155                 freq = ahd_calc_syncsrate(tinfo->period);
 156                 speed = freq;
 157         }
 158         speed *= (0x01 << tinfo->width);
 159         mb = speed / 1000;
 160         if (mb > 0)
 161                 copy_info(info, "%d.%03dMB/s transfers", mb, speed % 1000);
 162         else
 163                 copy_info(info, "%dKB/s transfers", speed);
 164
 165         if (freq != 0) {
 166                 int     printed_options;
 167
 168                 printed_options = 0;
 169                 copy_info(info, " (%d.%03dMHz", freq / 1000, freq % 1000);
 170                 if ((tinfo->ppr_options & MSG_EXT_PPR_RD_STRM) != 0) {
 171                         copy_info(info, " RDSTRM");
 172                         printed_options++;
 173                 }
 174                 if ((tinfo->ppr_options & MSG_EXT_PPR_DT_REQ) != 0) {
 175                         copy_info(info, "%s", printed_options ? "|DT" : " DT");
 176                         printed_options++;
 177                 }
 178                 if ((tinfo->ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
 179                         copy_info(info, "%s", printed_options ? "|IU" : " IU");
 180                         printed_options++;
 181                 }
 182                 if ((tinfo->ppr_options & MSG_EXT_PPR_RTI) != 0) {
 183                         copy_info(info, "%s",
 184                                   printed_options ? "|RTI" : " RTI");
 185                         printed_options++;
 186                 }
 187                 if ((tinfo->ppr_options & MSG_EXT_PPR_QAS_REQ) != 0) {
 188                         copy_info(info, "%s",
 189                                   printed_options ? "|QAS" : " QAS");
 190                         printed_options++;
 191                 }
 192         }
 193
 194         if (tinfo->width > 0) {
 195                 if (freq != 0) {
 196                         copy_info(info, ", ");
 197                 } else {
 198                         copy_info(info, " (");
 199                 }
 200                 copy_info(info, "%dbit)", 8 * (0x01 << tinfo->width));
 201         } else if (freq != 0) {
 202                 copy_info(info, ")");
 203         }
 204         copy_info(info, "\n");
 205 }
 206
 207 static void
 208 ahd_dump_target_state(struct ahd_softc *ahd, struct info_str *info,
 209                       u_int our_id, char channel, u_int target_id,
 210                       u_int target_offset)
 211 {
 212         struct  ahd_linux_target *targ;
 213         struct  scsi_target *starget;
 214         struct  ahd_initiator_tinfo *tinfo;
 215         struct  ahd_tmode_tstate *tstate;
 216         int     lun;
 217
 218         tinfo = ahd_fetch_transinfo(ahd, channel, our_id,
 219                                     target_id, &tstate);
 220         copy_info(info, "Target %d Negotiation Settings\n", target_id);
 221         copy_info(info, "\tUser: ");
 222         ahd_format_transinfo(info, &tinfo->user);
 223         starget = ahd->platform_data->starget[target_offset];
 224         if (starget == NULL)
 225                 return;
 226         targ = scsi_transport_target_data(starget);
 227
 228         copy_info(info, "\tGoal: ");
 229         ahd_format_transinfo(info, &tinfo->goal);
 230         copy_info(info, "\tCurr: ");
 231         ahd_format_transinfo(info, &tinfo->curr);
 232
 233         for (lun = 0; lun < AHD_NUM_LUNS; lun++) {
 234                 struct scsi_device *dev;
 235
 236                 dev = targ->sdev[lun];
 237
 238                 if (dev == NULL)
 239                         continue;
 240
 241                 ahd_dump_device_state(info, dev);
 242         }
 243 }
 244
 245 static void
 246 ahd_dump_device_state(struct info_str *info, struct scsi_device *sdev)
 247 {
 248         struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
 249
 250         copy_info(info, "\tChannel %c Target %d Lun %d Settings\n",
 251                   sdev->sdev_target->channel + 'A',
 252                   sdev->sdev_target->id, sdev->lun);
 253
 254         copy_info(info, "\t\tCommands Queued %ld\n", dev->commands_issued);
 255         copy_info(info, "\t\tCommands Active %d\n", dev->active);
 256         copy_info(info, "\t\tCommand Openings %d\n", dev->openings);
 257         copy_info(info, "\t\tMax Tagged Openings %d\n", dev->maxtags);
 258         copy_info(info, "\t\tDevice Queue Frozen Count %d\n", dev->qfrozen);
 259 }
 260
 261 static int
 262 ahd_proc_write_seeprom(struct ahd_softc *ahd, char *buffer, int length)
 263 {
 264         ahd_mode_state saved_modes;
 265         int have_seeprom;
 266         u_long s;
 267         int paused;
 268         int written;
 269
 270         /* Default to failure. */
 271         written = -EINVAL;
 272         ahd_lock(ahd, &s);
 273         paused = ahd_is_paused(ahd);
 274         if (!paused)
 275                 ahd_pause(ahd);
 276
 277         saved_modes = ahd_save_modes(ahd);
 278         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
 279         if (length != sizeof(struct seeprom_config)) {
 280                 printf("ahd_proc_write_seeprom: incorrect buffer size\n");
 281                 goto done;
 282         }
 283
 284         have_seeprom = ahd_verify_cksum((struct seeprom_config*)buffer);
 285         if (have_seeprom == 0) {
 286                 printf("ahd_proc_write_seeprom: cksum verification failed\n");
 287                 goto done;
 288         }
 289
 290         have_seeprom = ahd_acquire_seeprom(ahd);
 291         if (!have_seeprom) {
 292                 printf("ahd_proc_write_seeprom: No Serial EEPROM\n");
 293                 goto done;
 294         } else {
 295                 u_int start_addr;
 296
 297                 if (ahd->seep_config == NULL) {
 298                         ahd->seep_config = malloc(sizeof(*ahd->seep_config),
 299                                                   M_DEVBUF, M_NOWAIT);
 300                         if (ahd->seep_config == NULL) {
 301                                 printf("aic79xx: Unable to allocate serial "
 302                                        "eeprom buffer.  Write failing\n");
 303                                 goto done;
 304                         }
 305                 }
 306                 printf("aic79xx: Writing Serial EEPROM\n");
 307                 start_addr = 32 * (ahd->channel - 'A');
 308                 ahd_write_seeprom(ahd, (u_int16_t *)buffer, start_addr,
 309                                   sizeof(struct seeprom_config)/2);
 310                 ahd_read_seeprom(ahd, (uint16_t *)ahd->seep_config,
 311                                  start_addr, sizeof(struct seeprom_config)/2,
 312                                  /*ByteStream*/FALSE);
 313                 ahd_release_seeprom(ahd);
 314                 written = length;
 315         }
 316
 317 done:
 318         ahd_restore_modes(ahd, saved_modes);
 319         if (!paused)
 320                 ahd_unpause(ahd);
 321         ahd_unlock(ahd, &s);
 322         return (written);
 323 }
 324 /*
 325  * Return information to handle /proc support for the driver.
 326  */
 327 int
 328 ahd_linux_proc_info(struct Scsi_Host *shost, char *buffer, char **start,
 329                     off_t offset, int length, int inout)
 330 {
 331         struct  ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
 332         struct  info_str info;
 333         char    ahd_info[256];
 334         u_int   max_targ;
 335         u_int   i;
 336         int     retval;
 337
 338          /* Has data been written to the file? */
 339         if (inout == TRUE) {
 340                 retval = ahd_proc_write_seeprom(ahd, buffer, length);
 341                 goto done;
 342         }
 343
 344         if (start)
 345                 *start = buffer;
 346
 347         info.buffer     = buffer;
 348         info.length     = length;
 349         info.offset     = offset;
 350         info.pos        = 0;
 351
 352         copy_info(&info, "Adaptec AIC79xx driver version: %s\n",
 353                   AIC79XX_DRIVER_VERSION);
 354         copy_info(&info, "%s\n", ahd->description);
 355         ahd_controller_info(ahd, ahd_info);
 356         copy_info(&info, "%s\n", ahd_info);
 357         copy_info(&info, "Allocated SCBs: %d, SG List Length: %d\n\n",
 358                   ahd->scb_data.numscbs, AHD_NSEG);
 359
 360         max_targ = 15;
 361
 362         if (ahd->seep_config == NULL)
 363                 copy_info(&info, "No Serial EEPROM\n");
 364         else {
 365                 copy_info(&info, "Serial EEPROM:\n");
 366                 for (i = 0; i < sizeof(*ahd->seep_config)/2; i++) {
 367                         if (((i % 8) == 0) && (i != 0)) {
 368                                 copy_info(&info, "\n");
 369                         }
 370                         copy_info(&info, "0x%.4x ",
 371                                   ((uint16_t*)ahd->seep_config)[i]);
 372                 }
 373                 copy_info(&info, "\n");
 374         }
 375         copy_info(&info, "\n");
 376
 377         if ((ahd->features & AHD_WIDE) == 0)
 378                 max_targ = 7;
 379
 380         for (i = 0; i <= max_targ; i++) {
 381
 382                 ahd_dump_target_state(ahd, &info, ahd->our_id, 'A',
 383                                       /*target_id*/i, /*target_offset*/i);
 384         }
 385         retval = info.pos > info.offset ? info.pos - info.offset : 0;
 386 done:
 387         return (retval);
 388 }