drivers/scsi/aic7xxx/aic7xxx_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/aic7xxx_proc.c#29 $
  41  */
  42 #include "aic7xxx_osm.h"
  43 #include "aic7xxx_inline.h"
  44 #include "aic7xxx_93cx6.h"
  45
  46 static void     copy_mem_info(struct info_str *info, char *data, int len);
  47 static int      copy_info(struct info_str *info, char *fmt, ...);
  48 static void     ahc_dump_target_state(struct ahc_softc *ahc,
  49                                       struct info_str *info,
  50                                       u_int our_id, char channel,
  51                                       u_int target_id, u_int target_offset);
  52 static void     ahc_dump_device_state(struct info_str *info,
  53                                       struct scsi_device *dev);
  54 static int      ahc_proc_write_seeprom(struct ahc_softc *ahc,
  55                                        char *buffer, int length);
  56
  57 /*
  58  * Table of syncrates that don't follow the "divisible by 4"
  59  * rule. This table will be expanded in future SCSI specs.
  60  */
  61 static const struct {
  62         u_int period_factor;
  63         u_int period;   /* in 100ths of ns */
  64 } scsi_syncrates[] = {
  65         { 0x08, 625 },  /* FAST-160 */
  66         { 0x09, 1250 }, /* FAST-80 */
  67         { 0x0a, 2500 }, /* FAST-40 40MHz */
  68         { 0x0b, 3030 }, /* FAST-40 33MHz */
  69         { 0x0c, 5000 }  /* FAST-20 */
  70 };
  71
  72 /*
  73  * Return the frequency in kHz corresponding to the given
  74  * sync period factor.
  75  */
  76 static u_int
  77 ahc_calc_syncsrate(u_int period_factor)
  78 {
  79         int i;
  80
  81         /* See if the period is in the "exception" table */
  82         for (i = 0; i < ARRAY_SIZE(scsi_syncrates); i++) {
  83
  84                 if (period_factor == scsi_syncrates[i].period_factor) {
  85                         /* Period in kHz */
  86                         return (100000000 / scsi_syncrates[i].period);
  87                 }
  88         }
  89
  90         /*
  91          * Wasn't in the table, so use the standard
  92          * 4 times conversion.
  93          */
  94         return (10000000 / (period_factor * 4 * 10));
  95 }
  96
  97
  98 static void
  99 copy_mem_info(struct info_str *info, char *data, int len)
 100 {
 101         if (info->pos + len > info->offset + info->length)
 102                 len = info->offset + info->length - info->pos;
 103
 104         if (info->pos + len < info->offset) {
 105                 info->pos += len;
 106                 return;
 107         }
 108
 109         if (info->pos < info->offset) {
 110                 off_t partial;
 111
 112                 partial = info->offset - info->pos;
 113                 data += partial;
 114                 info->pos += partial;
 115                 len  -= partial;
 116         }
 117
 118         if (len > 0) {
 119                 memcpy(info->buffer, data, len);
 120                 info->pos += len;
 121                 info->buffer += len;
 122         }
 123 }
 124
 125 static int
 126 copy_info(struct info_str *info, char *fmt, ...)
 127 {
 128         va_list args;
 129         char buf[256];
 130         int len;
 131
 132         va_start(args, fmt);
 133         len = vsprintf(buf, fmt, args);
 134         va_end(args);
 135
 136         copy_mem_info(info, buf, len);
 137         return (len);
 138 }
 139
 140 static void
 141 ahc_format_transinfo(struct info_str *info, struct ahc_transinfo *tinfo)
 142 {
 143         u_int speed;
 144         u_int freq;
 145         u_int mb;
 146
 147         speed = 3300;
 148         freq = 0;
 149         if (tinfo->offset != 0) {
 150                 freq = ahc_calc_syncsrate(tinfo->period);
 151                 speed = freq;
 152         }
 153         speed *= (0x01 << tinfo->width);
 154         mb = speed / 1000;
 155         if (mb > 0)
 156                 copy_info(info, "%d.%03dMB/s transfers", mb, speed % 1000);
 157         else
 158                 copy_info(info, "%dKB/s transfers", speed);
 159
 160         if (freq != 0) {
 161                 copy_info(info, " (%d.%03dMHz%s, offset %d",
 162                          freq / 1000, freq % 1000,
 163                          (tinfo->ppr_options & MSG_EXT_PPR_DT_REQ) != 0
 164                          ? " DT" : "", tinfo->offset);
 165         }
 166
 167         if (tinfo->width > 0) {
 168                 if (freq != 0) {
 169                         copy_info(info, ", ");
 170                 } else {
 171                         copy_info(info, " (");
 172                 }
 173                 copy_info(info, "%dbit)", 8 * (0x01 << tinfo->width));
 174         } else if (freq != 0) {
 175                 copy_info(info, ")");
 176         }
 177         copy_info(info, "\n");
 178 }
 179
 180 static void
 181 ahc_dump_target_state(struct ahc_softc *ahc, struct info_str *info,
 182                       u_int our_id, char channel, u_int target_id,
 183                       u_int target_offset)
 184 {
 185         struct  scsi_target *starget;
 186         struct  ahc_initiator_tinfo *tinfo;
 187         struct  ahc_tmode_tstate *tstate;
 188         int     lun;
 189
 190         tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
 191                                     target_id, &tstate);
 192         if ((ahc->features & AHC_TWIN) != 0)
 193                 copy_info(info, "Channel %c ", channel);
 194         copy_info(info, "Target %d Negotiation Settings\n", target_id);
 195         copy_info(info, "\tUser: ");
 196         ahc_format_transinfo(info, &tinfo->user);
 197         starget = ahc->platform_data->starget[target_offset];
 198         if (!starget)
 199                 return;
 200
 201         copy_info(info, "\tGoal: ");
 202         ahc_format_transinfo(info, &tinfo->goal);
 203         copy_info(info, "\tCurr: ");
 204         ahc_format_transinfo(info, &tinfo->curr);
 205
 206         for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
 207                 struct scsi_device *sdev;
 208
 209                 sdev = scsi_device_lookup_by_target(starget, lun);
 210
 211                 if (sdev == NULL)
 212                         continue;
 213
 214                 ahc_dump_device_state(info, sdev);
 215         }
 216 }
 217
 218 static void
 219 ahc_dump_device_state(struct info_str *info, struct scsi_device *sdev)
 220 {
 221         struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
 222
 223         copy_info(info, "\tChannel %c Target %d Lun %d Settings\n",
 224                   sdev->sdev_target->channel + 'A',
 225                   sdev->sdev_target->id, sdev->lun);
 226
 227         copy_info(info, "\t\tCommands Queued %ld\n", dev->commands_issued);
 228         copy_info(info, "\t\tCommands Active %d\n", dev->active);
 229         copy_info(info, "\t\tCommand Openings %d\n", dev->openings);
 230         copy_info(info, "\t\tMax Tagged Openings %d\n", dev->maxtags);
 231         copy_info(info, "\t\tDevice Queue Frozen Count %d\n", dev->qfrozen);
 232 }
 233
 234 static int
 235 ahc_proc_write_seeprom(struct ahc_softc *ahc, char *buffer, int length)
 236 {
 237         struct seeprom_descriptor sd;
 238         int have_seeprom;
 239         u_long s;
 240         int paused;
 241         int written;
 242
 243         /* Default to failure. */
 244         written = -EINVAL;
 245         ahc_lock(ahc, &s);
 246         paused = ahc_is_paused(ahc);
 247         if (!paused)
 248                 ahc_pause(ahc);
 249
 250         if (length != sizeof(struct seeprom_config)) {
 251                 printk("ahc_proc_write_seeprom: incorrect buffer size\n");
 252                 goto done;
 253         }
 254
 255         have_seeprom = ahc_verify_cksum((struct seeprom_config*)buffer);
 256         if (have_seeprom == 0) {
 257                 printk("ahc_proc_write_seeprom: cksum verification failed\n");
 258                 goto done;
 259         }
 260
 261         sd.sd_ahc = ahc;
 262 #if AHC_PCI_CONFIG > 0
 263         if ((ahc->chip & AHC_PCI) != 0) {
 264                 sd.sd_control_offset = SEECTL;
 265                 sd.sd_status_offset = SEECTL;
 266                 sd.sd_dataout_offset = SEECTL;
 267                 if (ahc->flags & AHC_LARGE_SEEPROM)
 268                         sd.sd_chip = C56_66;
 269                 else
 270                         sd.sd_chip = C46;
 271                 sd.sd_MS = SEEMS;
 272                 sd.sd_RDY = SEERDY;
 273                 sd.sd_CS = SEECS;
 274                 sd.sd_CK = SEECK;
 275                 sd.sd_DO = SEEDO;
 276                 sd.sd_DI = SEEDI;
 277                 have_seeprom = ahc_acquire_seeprom(ahc, &sd);
 278         } else
 279 #endif
 280         if ((ahc->chip & AHC_VL) != 0) {
 281                 sd.sd_control_offset = SEECTL_2840;
 282                 sd.sd_status_offset = STATUS_2840;
 283                 sd.sd_dataout_offset = STATUS_2840;
 284                 sd.sd_chip = C46;
 285                 sd.sd_MS = 0;
 286                 sd.sd_RDY = EEPROM_TF;
 287                 sd.sd_CS = CS_2840;
 288                 sd.sd_CK = CK_2840;
 289                 sd.sd_DO = DO_2840;
 290                 sd.sd_DI = DI_2840;
 291                 have_seeprom = TRUE;
 292         } else {
 293                 printk("ahc_proc_write_seeprom: unsupported adapter type\n");
 294                 goto done;
 295         }
 296
 297         if (!have_seeprom) {
 298                 printk("ahc_proc_write_seeprom: No Serial EEPROM\n");
 299                 goto done;
 300         } else {
 301                 u_int start_addr;
 302
 303                 if (ahc->seep_config == NULL) {
 304                         ahc->seep_config = kmalloc(sizeof(*ahc->seep_config), GFP_ATOMIC);
 305                         if (ahc->seep_config == NULL) {
 306                                 printk("aic7xxx: Unable to allocate serial "
 307                                        "eeprom buffer.  Write failing\n");
 308                                 goto done;
 309                         }
 310                 }
 311                 printk("aic7xxx: Writing Serial EEPROM\n");
 312                 start_addr = 32 * (ahc->channel - 'A');
 313                 ahc_write_seeprom(&sd, (u_int16_t *)buffer, start_addr,
 314                                   sizeof(struct seeprom_config)/2);
 315                 ahc_read_seeprom(&sd, (uint16_t *)ahc->seep_config,
 316                                  start_addr, sizeof(struct seeprom_config)/2);
 317 #if AHC_PCI_CONFIG > 0
 318                 if ((ahc->chip & AHC_VL) == 0)
 319                         ahc_release_seeprom(&sd);
 320 #endif
 321                 written = length;
 322         }
 323
 324 done:
 325         if (!paused)
 326                 ahc_unpause(ahc);
 327         ahc_unlock(ahc, &s);
 328         return (written);
 329 }
 330
 331 /*
 332  * Return information to handle /proc support for the driver.
 333  */
 334 int
 335 ahc_linux_proc_info(struct Scsi_Host *shost, char *buffer, char **start,
 336                     off_t offset, int length, int inout)
 337 {
 338         struct  ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
 339         struct  info_str info;
 340         char    ahc_info[256];
 341         u_int   max_targ;
 342         u_int   i;
 343         int     retval;
 344
 345          /* Has data been written to the file? */
 346         if (inout == TRUE) {
 347                 retval = ahc_proc_write_seeprom(ahc, buffer, length);
 348                 goto done;
 349         }
 350
 351         if (start)
 352                 *start = buffer;
 353
 354         info.buffer     = buffer;
 355         info.length     = length;
 356         info.offset     = offset;
 357         info.pos        = 0;
 358
 359         copy_info(&info, "Adaptec AIC7xxx driver version: %s\n",
 360                   AIC7XXX_DRIVER_VERSION);
 361         copy_info(&info, "%s\n", ahc->description);
 362         ahc_controller_info(ahc, ahc_info);
 363         copy_info(&info, "%s\n", ahc_info);
 364         copy_info(&info, "Allocated SCBs: %d, SG List Length: %d\n\n",
 365                   ahc->scb_data->numscbs, AHC_NSEG);
 366
 367
 368         if (ahc->seep_config == NULL)
 369                 copy_info(&info, "No Serial EEPROM\n");
 370         else {
 371                 copy_info(&info, "Serial EEPROM:\n");
 372                 for (i = 0; i < sizeof(*ahc->seep_config)/2; i++) {
 373                         if (((i % 8) == 0) && (i != 0)) {
 374                                 copy_info(&info, "\n");
 375                         }
 376                         copy_info(&info, "0x%.4x ",
 377                                   ((uint16_t*)ahc->seep_config)[i]);
 378                 }
 379                 copy_info(&info, "\n");
 380         }
 381         copy_info(&info, "\n");
 382
 383         max_targ = 16;
 384         if ((ahc->features & (AHC_WIDE|AHC_TWIN)) == 0)
 385                 max_targ = 8;
 386
 387         for (i = 0; i < max_targ; i++) {
 388                 u_int our_id;
 389                 u_int target_id;
 390                 char channel;
 391
 392                 channel = 'A';
 393                 our_id = ahc->our_id;
 394                 target_id = i;
 395                 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
 396                         channel = 'B';
 397                         our_id = ahc->our_id_b;
 398                         target_id = i % 8;
 399                 }
 400
 401                 ahc_dump_target_state(ahc, &info, our_id,
 402                                       channel, target_id, i);
 403         }
 404         retval = info.pos > info.offset ? info.pos - info.offset : 0;
 405 done:
 406         return (retval);
 407 }