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);
  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
  80         /* See if the period is in the "exception" table */
  81         for (i = 0; i < ARRAY_SIZE(scsi_syncrates); i++) {
  82
  83                 if (period_factor == scsi_syncrates[i].period_factor) {
  84                         /* Period in kHz */
  85                         return (100000000 / scsi_syncrates[i].period);
  86                 }
  87         }
  88
  89         /*
  90          * Wasn't in the table, so use the standard
  91          * 4 times conversion.
  92          */
  93         return (10000000 / (period_factor * 4 * 10));
  94 }
  95
  96
  97 static void
  98 copy_mem_info(struct info_str *info, char *data, int len)
  99 {
 100         if (info->pos + len > info->offset + info->length)
 101                 len = info->offset + info->length - info->pos;
 102
 103         if (info->pos + len < info->offset) {
 104                 info->pos += len;
 105                 return;
 106         }
 107
 108         if (info->pos < info->offset) {
 109                 off_t partial;
 110
 111                 partial = info->offset - info->pos;
 112                 data += partial;
 113                 info->pos += partial;
 114                 len  -= partial;
 115         }
 116
 117         if (len > 0) {
 118                 memcpy(info->buffer, data, len);
 119                 info->pos += len;
 120                 info->buffer += len;
 121         }
 122 }
 123
 124 static int
 125 copy_info(struct info_str *info, char *fmt, ...)
 126 {
 127         va_list args;
 128         char buf[256];
 129         int len;
 130
 131         va_start(args, fmt);
 132         len = vsprintf(buf, fmt, args);
 133         va_end(args);
 134
 135         copy_mem_info(info, buf, len);
 136         return (len);
 137 }
 138
 139 void
 140 ahd_format_transinfo(struct info_str *info, struct ahd_transinfo *tinfo)
 141 {
 142         u_int speed;
 143         u_int freq;
 144         u_int mb;
 145
 146         if (tinfo->period == AHD_PERIOD_UNKNOWN) {
 147                 copy_info(info, "Renegotiation Pending\n");
 148                 return;
 149         }
 150         speed = 3300;
 151         freq = 0;
 152         if (tinfo->offset != 0) {
 153                 freq = ahd_calc_syncsrate(tinfo->period);
 154                 speed = freq;
 155         }
 156         speed *= (0x01 << tinfo->width);
 157         mb = speed / 1000;
 158         if (mb > 0)
 159                 copy_info(info, "%d.%03dMB/s transfers", mb, speed % 1000);
 160         else
 161                 copy_info(info, "%dKB/s transfers", speed);
 162
 163         if (freq != 0) {
 164                 int     printed_options;
 165
 166                 printed_options = 0;
 167                 copy_info(info, " (%d.%03dMHz", freq / 1000, freq % 1000);
 168                 if ((tinfo->ppr_options & MSG_EXT_PPR_RD_STRM) != 0) {
 169                         copy_info(info, " RDSTRM");
 170                         printed_options++;
 171                 }
 172                 if ((tinfo->ppr_options & MSG_EXT_PPR_DT_REQ) != 0) {
 173                         copy_info(info, "%s", printed_options ? "|DT" : " DT");
 174                         printed_options++;
 175                 }
 176                 if ((tinfo->ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
 177                         copy_info(info, "%s", printed_options ? "|IU" : " IU");
 178                         printed_options++;
 179                 }
 180                 if ((tinfo->ppr_options & MSG_EXT_PPR_RTI) != 0) {
 181                         copy_info(info, "%s",
 182                                   printed_options ? "|RTI" : " RTI");
 183                         printed_options++;
 184                 }
 185                 if ((tinfo->ppr_options & MSG_EXT_PPR_QAS_REQ) != 0) {
 186                         copy_info(info, "%s",
 187                                   printed_options ? "|QAS" : " QAS");
 188                         printed_options++;
 189                 }
 190         }
 191
 192         if (tinfo->width > 0) {
 193                 if (freq != 0) {
 194                         copy_info(info, ", ");
 195                 } else {
 196                         copy_info(info, " (");
 197                 }
 198                 copy_info(info, "%dbit)", 8 * (0x01 << tinfo->width));
 199         } else if (freq != 0) {
 200                 copy_info(info, ")");
 201         }
 202         copy_info(info, "\n");
 203 }
 204
 205 static void
 206 ahd_dump_target_state(struct ahd_softc *ahd, struct info_str *info,
 207                       u_int our_id, char channel, u_int target_id)
 208 {
 209         struct  scsi_target *starget;
 210         struct  ahd_initiator_tinfo *tinfo;
 211         struct  ahd_tmode_tstate *tstate;
 212         int     lun;
 213
 214         tinfo = ahd_fetch_transinfo(ahd, channel, our_id,
 215                                     target_id, &tstate);
 216         copy_info(info, "Target %d Negotiation Settings\n", target_id);
 217         copy_info(info, "\tUser: ");
 218         ahd_format_transinfo(info, &tinfo->user);
 219         starget = ahd->platform_data->starget[target_id];
 220         if (starget == NULL)
 221                 return;
 222
 223         copy_info(info, "\tGoal: ");
 224         ahd_format_transinfo(info, &tinfo->goal);
 225         copy_info(info, "\tCurr: ");
 226         ahd_format_transinfo(info, &tinfo->curr);
 227
 228         for (lun = 0; lun < AHD_NUM_LUNS; lun++) {
 229                 struct scsi_device *dev;
 230
 231                 dev = scsi_device_lookup_by_target(starget, lun);
 232
 233                 if (dev == NULL)
 234                         continue;
 235
 236                 ahd_dump_device_state(info, dev);
 237         }
 238 }
 239
 240 static void
 241 ahd_dump_device_state(struct info_str *info, struct scsi_device *sdev)
 242 {
 243         struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
 244
 245         copy_info(info, "\tChannel %c Target %d Lun %d Settings\n",
 246                   sdev->sdev_target->channel + 'A',
 247                   sdev->sdev_target->id, sdev->lun);
 248
 249         copy_info(info, "\t\tCommands Queued %ld\n", dev->commands_issued);
 250         copy_info(info, "\t\tCommands Active %d\n", dev->active);
 251         copy_info(info, "\t\tCommand Openings %d\n", dev->openings);
 252         copy_info(info, "\t\tMax Tagged Openings %d\n", dev->maxtags);
 253         copy_info(info, "\t\tDevice Queue Frozen Count %d\n", dev->qfrozen);
 254 }
 255
 256 static int
 257 ahd_proc_write_seeprom(struct ahd_softc *ahd, char *buffer, int length)
 258 {
 259         ahd_mode_state saved_modes;
 260         int have_seeprom;
 261         u_long s;
 262         int paused;
 263         int written;
 264
 265         /* Default to failure. */
 266         written = -EINVAL;
 267         ahd_lock(ahd, &s);
 268         paused = ahd_is_paused(ahd);
 269         if (!paused)
 270                 ahd_pause(ahd);
 271
 272         saved_modes = ahd_save_modes(ahd);
 273         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
 274         if (length != sizeof(struct seeprom_config)) {
 275                 printf("ahd_proc_write_seeprom: incorrect buffer size\n");
 276                 goto done;
 277         }
 278
 279         have_seeprom = ahd_verify_cksum((struct seeprom_config*)buffer);
 280         if (have_seeprom == 0) {
 281                 printf("ahd_proc_write_seeprom: cksum verification failed\n");
 282                 goto done;
 283         }
 284
 285         have_seeprom = ahd_acquire_seeprom(ahd);
 286         if (!have_seeprom) {
 287                 printf("ahd_proc_write_seeprom: No Serial EEPROM\n");
 288                 goto done;
 289         } else {
 290                 u_int start_addr;
 291
 292                 if (ahd->seep_config == NULL) {
 293                         ahd->seep_config = malloc(sizeof(*ahd->seep_config),
 294                                                   M_DEVBUF, M_NOWAIT);
 295                         if (ahd->seep_config == NULL) {
 296                                 printf("aic79xx: Unable to allocate serial "
 297                                        "eeprom buffer.  Write failing\n");
 298                                 goto done;
 299                         }
 300                 }
 301                 printf("aic79xx: Writing Serial EEPROM\n");
 302                 start_addr = 32 * (ahd->channel - 'A');
 303                 ahd_write_seeprom(ahd, (u_int16_t *)buffer, start_addr,
 304                                   sizeof(struct seeprom_config)/2);
 305                 ahd_read_seeprom(ahd, (uint16_t *)ahd->seep_config,
 306                                  start_addr, sizeof(struct seeprom_config)/2,
 307                                  /*ByteStream*/FALSE);
 308                 ahd_release_seeprom(ahd);
 309                 written = length;
 310         }
 311
 312 done:
 313         ahd_restore_modes(ahd, saved_modes);
 314         if (!paused)
 315                 ahd_unpause(ahd);
 316         ahd_unlock(ahd, &s);
 317         return (written);
 318 }
 319 /*
 320  * Return information to handle /proc support for the driver.
 321  */
 322 int
 323 ahd_linux_proc_info(struct Scsi_Host *shost, char *buffer, char **start,
 324                     off_t offset, int length, int inout)
 325 {
 326         struct  ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
 327         struct  info_str info;
 328         char    ahd_info[256];
 329         u_int   max_targ;
 330         u_int   i;
 331         int     retval;
 332
 333          /* Has data been written to the file? */
 334         if (inout == TRUE) {
 335                 retval = ahd_proc_write_seeprom(ahd, buffer, length);
 336                 goto done;
 337         }
 338
 339         if (start)
 340                 *start = buffer;
 341
 342         info.buffer     = buffer;
 343         info.length     = length;
 344         info.offset     = offset;
 345         info.pos        = 0;
 346
 347         copy_info(&info, "Adaptec AIC79xx driver version: %s\n",
 348                   AIC79XX_DRIVER_VERSION);
 349         copy_info(&info, "%s\n", ahd->description);
 350         ahd_controller_info(ahd, ahd_info);
 351         copy_info(&info, "%s\n", ahd_info);
 352         copy_info(&info, "Allocated SCBs: %d, SG List Length: %d\n\n",
 353                   ahd->scb_data.numscbs, AHD_NSEG);
 354
 355         max_targ = 16;
 356
 357         if (ahd->seep_config == NULL)
 358                 copy_info(&info, "No Serial EEPROM\n");
 359         else {
 360                 copy_info(&info, "Serial EEPROM:\n");
 361                 for (i = 0; i < sizeof(*ahd->seep_config)/2; i++) {
 362                         if (((i % 8) == 0) && (i != 0)) {
 363                                 copy_info(&info, "\n");
 364                         }
 365                         copy_info(&info, "0x%.4x ",
 366                                   ((uint16_t*)ahd->seep_config)[i]);
 367                 }
 368                 copy_info(&info, "\n");
 369         }
 370         copy_info(&info, "\n");
 371
 372         if ((ahd->features & AHD_WIDE) == 0)
 373                 max_targ = 8;
 374
 375         for (i = 0; i < max_targ; i++) {
 376
 377                 ahd_dump_target_state(ahd, &info, ahd->our_id, 'A',
 378                                       /*target_id*/i);
 379         }
 380         retval = info.pos > info.offset ? info.pos - info.offset : 0;
 381 done:
 382         return (retval);
 383 }