linux/drivers/scsi/aic7xxx/aic7xxx_proc.c
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   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
  46static void     copy_mem_info(struct info_str *info, char *data, int len);
  47static int      copy_info(struct info_str *info, char *fmt, ...);
  48static 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);
  52static void     ahc_dump_device_state(struct info_str *info,
  53                                      struct scsi_device *dev);
  54static 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 */
  61static 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 */
  76static u_int
  77ahc_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
  98static void
  99copy_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
 125static int
 126copy_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
 140static void
 141ahc_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
 180static void
 181ahc_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
 218static void
 219ahc_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
 234static int
 235ahc_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
 324done:
 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 */
 334int
 335ahc_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;
 405done:
 406        return (retval);
 407}
 408
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