kernel/drivers/scsi/sym53c8xx_2/sym_glue.c

   1 /*
   2  * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
   3  * of PCI-SCSI IO processors.
   4  *
   5  * Copyright (C) 1999-2001  Gerard Roudier <groudier@free.fr>
   6  * Copyright (c) 2003-2005  Matthew Wilcox <matthew@wil.cx>
   7  *
   8  * This driver is derived from the Linux sym53c8xx driver.
   9  * Copyright (C) 1998-2000  Gerard Roudier
  10  *
  11  * The sym53c8xx driver is derived from the ncr53c8xx driver that had been
  12  * a port of the FreeBSD ncr driver to Linux-1.2.13.
  13  *
  14  * The original ncr driver has been written for 386bsd and FreeBSD by
  15  *         Wolfgang Stanglmeier        <wolf@cologne.de>
  16  *         Stefan Esser                <se@mi.Uni-Koeln.de>
  17  * Copyright (C) 1994  Wolfgang Stanglmeier
  18  *
  19  * Other major contributions:
  20  *
  21  * NVRAM detection and reading.
  22  * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
  23  *
  24  *-----------------------------------------------------------------------------
  25  *
  26  * This program is free software; you can redistribute it and/or modify
  27  * it under the terms of the GNU General Public License as published by
  28  * the Free Software Foundation; either version 2 of the License, or
  29  * (at your option) any later version.
  30  *
  31  * This program is distributed in the hope that it will be useful,
  32  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  33  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  34  * GNU General Public License for more details.
  35  *
  36  * You should have received a copy of the GNU General Public License
  37  * along with this program; if not, write to the Free Software
  38  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  39  */
  40 #include <linux/ctype.h>
  41 #include <linux/init.h>
  42 #include <linux/module.h>
  43 #include <linux/moduleparam.h>
  44 #include <linux/spinlock.h>
  45 #include <scsi/scsi.h>
  46 #include <scsi/scsi_tcq.h>
  47 #include <scsi/scsi_device.h>
  48 #include <scsi/scsi_transport.h>
  49
  50 #include "sym_glue.h"
  51 #include "sym_nvram.h"
  52
  53 #define NAME53C         "sym53c"
  54 #define NAME53C8XX      "sym53c8xx"
  55
  56 struct sym_driver_setup sym_driver_setup = SYM_LINUX_DRIVER_SETUP;
  57 unsigned int sym_debug_flags = 0;
  58
  59 static char *excl_string;
  60 static char *safe_string;
  61 module_param_named(cmd_per_lun, sym_driver_setup.max_tag, ushort, 0);
  62 module_param_named(burst, sym_driver_setup.burst_order, byte, 0);
  63 module_param_named(led, sym_driver_setup.scsi_led, byte, 0);
  64 module_param_named(diff, sym_driver_setup.scsi_diff, byte, 0);
  65 module_param_named(irqm, sym_driver_setup.irq_mode, byte, 0);
  66 module_param_named(buschk, sym_driver_setup.scsi_bus_check, byte, 0);
  67 module_param_named(hostid, sym_driver_setup.host_id, byte, 0);
  68 module_param_named(verb, sym_driver_setup.verbose, byte, 0);
  69 module_param_named(debug, sym_debug_flags, uint, 0);
  70 module_param_named(settle, sym_driver_setup.settle_delay, byte, 0);
  71 module_param_named(nvram, sym_driver_setup.use_nvram, byte, 0);
  72 module_param_named(excl, excl_string, charp, 0);
  73 module_param_named(safe, safe_string, charp, 0);
  74
  75 MODULE_PARM_DESC(cmd_per_lun, "The maximum number of tags to use by default");
  76 MODULE_PARM_DESC(burst, "Maximum burst.  0 to disable, 255 to read from registers");
  77 MODULE_PARM_DESC(led, "Set to 1 to enable LED support");
  78 MODULE_PARM_DESC(diff, "0 for no differential mode, 1 for BIOS, 2 for always, 3 for not GPIO3");
  79 MODULE_PARM_DESC(irqm, "0 for open drain, 1 to leave alone, 2 for totem pole");
  80 MODULE_PARM_DESC(buschk, "0 to not check, 1 for detach on error, 2 for warn on error");
  81 MODULE_PARM_DESC(hostid, "The SCSI ID to use for the host adapters");
  82 MODULE_PARM_DESC(verb, "0 for minimal verbosity, 1 for normal, 2 for excessive");
  83 MODULE_PARM_DESC(debug, "Set bits to enable debugging");
  84 MODULE_PARM_DESC(settle, "Settle delay in seconds.  Default 3");
  85 MODULE_PARM_DESC(nvram, "Option currently not used");
  86 MODULE_PARM_DESC(excl, "List ioport addresses here to prevent controllers from being attached");
  87 MODULE_PARM_DESC(safe, "Set other settings to a \"safe mode\"");
  88
  89 MODULE_LICENSE("GPL");
  90 MODULE_VERSION(SYM_VERSION);
  91 MODULE_AUTHOR("Matthew Wilcox <matthew@wil.cx>");
  92 MODULE_DESCRIPTION("NCR, Symbios and LSI 8xx and 1010 PCI SCSI adapters");
  93
  94 static void sym2_setup_params(void)
  95 {
  96         char *p = excl_string;
  97         int xi = 0;
  98
  99         while (p && (xi < 8)) {
 100                 char *next_p;
 101                 int val = (int) simple_strtoul(p, &next_p, 0);
 102                 sym_driver_setup.excludes[xi++] = val;
 103                 p = next_p;
 104         }
 105
 106         if (safe_string) {
 107                 if (*safe_string == 'y') {
 108                         sym_driver_setup.max_tag = 0;
 109                         sym_driver_setup.burst_order = 0;
 110                         sym_driver_setup.scsi_led = 0;
 111                         sym_driver_setup.scsi_diff = 1;
 112                         sym_driver_setup.irq_mode = 0;
 113                         sym_driver_setup.scsi_bus_check = 2;
 114                         sym_driver_setup.host_id = 7;
 115                         sym_driver_setup.verbose = 2;
 116                         sym_driver_setup.settle_delay = 10;
 117                         sym_driver_setup.use_nvram = 1;
 118                 } else if (*safe_string != 'n') {
 119                         printk(KERN_WARNING NAME53C8XX "Ignoring parameter %s"
 120                                         " passed to safe option", safe_string);
 121                 }
 122         }
 123 }
 124
 125 static struct scsi_transport_template *sym2_transport_template = NULL;
 126
 127 /*
 128  *  Driver private area in the SCSI command structure.
 129  */
 130 struct sym_ucmd {               /* Override the SCSI pointer structure */
 131         struct completion *eh_done;             /* SCSI error handling */
 132 };
 133
 134 #define SYM_UCMD_PTR(cmd)  ((struct sym_ucmd *)(&(cmd)->SCp))
 135 #define SYM_SOFTC_PTR(cmd) sym_get_hcb(cmd->device->host)
 136
 137 /*
 138  *  Complete a pending CAM CCB.
 139  */
 140 void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *cmd)
 141 {
 142         struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
 143         BUILD_BUG_ON(sizeof(struct scsi_pointer) < sizeof(struct sym_ucmd));
 144
 145         if (ucmd->eh_done)
 146                 complete(ucmd->eh_done);
 147
 148         scsi_dma_unmap(cmd);
 149         cmd->scsi_done(cmd);
 150 }
 151
 152 /*
 153  *  Tell the SCSI layer about a BUS RESET.
 154  */
 155 void sym_xpt_async_bus_reset(struct sym_hcb *np)
 156 {
 157         printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
 158         np->s.settle_time = jiffies + sym_driver_setup.settle_delay * HZ;
 159         np->s.settle_time_valid = 1;
 160         if (sym_verbose >= 2)
 161                 printf_info("%s: command processing suspended for %d seconds\n",
 162                             sym_name(np), sym_driver_setup.settle_delay);
 163 }
 164
 165 /*
 166  *  Choose the more appropriate CAM status if
 167  *  the IO encountered an extended error.
 168  */
 169 static int sym_xerr_cam_status(int cam_status, int x_status)
 170 {
 171         if (x_status) {
 172                 if      (x_status & XE_PARITY_ERR)
 173                         cam_status = DID_PARITY;
 174                 else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN))
 175                         cam_status = DID_ERROR;
 176                 else if (x_status & XE_BAD_PHASE)
 177                         cam_status = DID_ERROR;
 178                 else
 179                         cam_status = DID_ERROR;
 180         }
 181         return cam_status;
 182 }
 183
 184 /*
 185  *  Build CAM result for a failed or auto-sensed IO.
 186  */
 187 void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid)
 188 {
 189         struct scsi_cmnd *cmd = cp->cmd;
 190         u_int cam_status, scsi_status, drv_status;
 191
 192         drv_status  = 0;
 193         cam_status  = DID_OK;
 194         scsi_status = cp->ssss_status;
 195
 196         if (cp->host_flags & HF_SENSE) {
 197                 scsi_status = cp->sv_scsi_status;
 198                 resid = cp->sv_resid;
 199                 if (sym_verbose && cp->sv_xerr_status)
 200                         sym_print_xerr(cmd, cp->sv_xerr_status);
 201                 if (cp->host_status == HS_COMPLETE &&
 202                     cp->ssss_status == S_GOOD &&
 203                     cp->xerr_status == 0) {
 204                         cam_status = sym_xerr_cam_status(DID_OK,
 205                                                          cp->sv_xerr_status);
 206                         drv_status = DRIVER_SENSE;
 207                         /*
 208                          *  Bounce back the sense data to user.
 209                          */
 210                         memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
 211                         memcpy(cmd->sense_buffer, cp->sns_bbuf,
 212                                min(SCSI_SENSE_BUFFERSIZE, SYM_SNS_BBUF_LEN));
 213 #if 0
 214                         /*
 215                          *  If the device reports a UNIT ATTENTION condition
 216                          *  due to a RESET condition, we should consider all
 217                          *  disconnect CCBs for this unit as aborted.
 218                          */
 219                         if (1) {
 220                                 u_char *p;
 221                                 p  = (u_char *) cmd->sense_data;
 222                                 if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
 223                                         sym_clear_tasks(np, DID_ABORT,
 224                                                         cp->target,cp->lun, -1);
 225                         }
 226 #endif
 227                 } else {
 228                         /*
 229                          * Error return from our internal request sense.  This
 230                          * is bad: we must clear the contingent allegiance
 231                          * condition otherwise the device will always return
 232                          * BUSY.  Use a big stick.
 233                          */
 234                         sym_reset_scsi_target(np, cmd->device->id);
 235                         cam_status = DID_ERROR;
 236                 }
 237         } else if (cp->host_status == HS_COMPLETE)      /* Bad SCSI status */
 238                 cam_status = DID_OK;
 239         else if (cp->host_status == HS_SEL_TIMEOUT)     /* Selection timeout */
 240                 cam_status = DID_NO_CONNECT;
 241         else if (cp->host_status == HS_UNEXPECTED)      /* Unexpected BUS FREE*/
 242                 cam_status = DID_ERROR;
 243         else {                                          /* Extended error */
 244                 if (sym_verbose) {
 245                         sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
 246                                 cp->host_status, cp->ssss_status,
 247                                 cp->xerr_status);
 248                 }
 249                 /*
 250                  *  Set the most appropriate value for CAM status.
 251                  */
 252                 cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
 253         }
 254         scsi_set_resid(cmd, resid);
 255         cmd->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
 256 }
 257
 258 static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
 259 {
 260         int segment;
 261         int use_sg;
 262
 263         cp->data_len = 0;
 264
 265         use_sg = scsi_dma_map(cmd);
 266         if (use_sg > 0) {
 267                 struct scatterlist *sg;
 268                 struct sym_tcb *tp = &np->target[cp->target];
 269                 struct sym_tblmove *data;
 270
 271                 if (use_sg > SYM_CONF_MAX_SG) {
 272                         scsi_dma_unmap(cmd);
 273                         return -1;
 274                 }
 275
 276                 data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
 277
 278                 scsi_for_each_sg(cmd, sg, use_sg, segment) {
 279                         dma_addr_t baddr = sg_dma_address(sg);
 280                         unsigned int len = sg_dma_len(sg);
 281
 282                         if ((len & 1) && (tp->head.wval & EWS)) {
 283                                 len++;
 284                                 cp->odd_byte_adjustment++;
 285                         }
 286
 287                         sym_build_sge(np, &data[segment], baddr, len);
 288                         cp->data_len += len;
 289                 }
 290         } else {
 291                 segment = -2;
 292         }
 293
 294         return segment;
 295 }
 296
 297 /*
 298  *  Queue a SCSI command.
 299  */
 300 static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd)
 301 {
 302         struct scsi_device *sdev = cmd->device;
 303         struct sym_tcb *tp;
 304         struct sym_lcb *lp;
 305         struct sym_ccb *cp;
 306         int     order;
 307
 308         /*
 309          *  Retrieve the target descriptor.
 310          */
 311         tp = &np->target[sdev->id];
 312
 313         /*
 314          *  Select tagged/untagged.
 315          */
 316         lp = sym_lp(tp, sdev->lun);
 317         order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
 318
 319         /*
 320          *  Queue the SCSI IO.
 321          */
 322         cp = sym_get_ccb(np, cmd, order);
 323         if (!cp)
 324                 return 1;       /* Means resource shortage */
 325         sym_queue_scsiio(np, cmd, cp);
 326         return 0;
 327 }
 328
 329 /*
 330  *  Setup buffers and pointers that address the CDB.
 331  */
 332 static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
 333 {
 334         memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len);
 335
 336         cp->phys.cmd.addr = CCB_BA(cp, cdb_buf[0]);
 337         cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
 338
 339         return 0;
 340 }
 341
 342 /*
 343  *  Setup pointers that address the data and start the I/O.
 344  */
 345 int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
 346 {
 347         u32 lastp, goalp;
 348         int dir;
 349
 350         /*
 351          *  Build the CDB.
 352          */
 353         if (sym_setup_cdb(np, cmd, cp))
 354                 goto out_abort;
 355
 356         /*
 357          *  No direction means no data.
 358          */
 359         dir = cmd->sc_data_direction;
 360         if (dir != DMA_NONE) {
 361                 cp->segments = sym_scatter(np, cp, cmd);
 362                 if (cp->segments < 0) {
 363                         sym_set_cam_status(cmd, DID_ERROR);
 364                         goto out_abort;
 365                 }
 366
 367                 /*
 368                  *  No segments means no data.
 369                  */
 370                 if (!cp->segments)
 371                         dir = DMA_NONE;
 372         } else {
 373                 cp->data_len = 0;
 374                 cp->segments = 0;
 375         }
 376
 377         /*
 378          *  Set the data pointer.
 379          */
 380         switch (dir) {
 381         case DMA_BIDIRECTIONAL:
 382                 scmd_printk(KERN_INFO, cmd, "got DMA_BIDIRECTIONAL command");
 383                 sym_set_cam_status(cmd, DID_ERROR);
 384                 goto out_abort;
 385         case DMA_TO_DEVICE:
 386                 goalp = SCRIPTA_BA(np, data_out2) + 8;
 387                 lastp = goalp - 8 - (cp->segments * (2*4));
 388                 break;
 389         case DMA_FROM_DEVICE:
 390                 cp->host_flags |= HF_DATA_IN;
 391                 goalp = SCRIPTA_BA(np, data_in2) + 8;
 392                 lastp = goalp - 8 - (cp->segments * (2*4));
 393                 break;
 394         case DMA_NONE:
 395         default:
 396                 lastp = goalp = SCRIPTB_BA(np, no_data);
 397                 break;
 398         }
 399
 400         /*
 401          *  Set all pointers values needed by SCRIPTS.
 402          */
 403         cp->phys.head.lastp = cpu_to_scr(lastp);
 404         cp->phys.head.savep = cpu_to_scr(lastp);
 405         cp->startp          = cp->phys.head.savep;
 406         cp->goalp           = cpu_to_scr(goalp);
 407
 408         /*
 409          *  When `#ifed 1', the code below makes the driver
 410          *  panic on the first attempt to write to a SCSI device.
 411          *  It is the first test we want to do after a driver
 412          *  change that does not seem obviously safe. :)
 413          */
 414 #if 0
 415         switch (cp->cdb_buf[0]) {
 416         case 0x0A: case 0x2A: case 0xAA:
 417                 panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
 418                 break;
 419         default:
 420                 break;
 421         }
 422 #endif
 423
 424         /*
 425          *      activate this job.
 426          */
 427         sym_put_start_queue(np, cp);
 428         return 0;
 429
 430 out_abort:
 431         sym_free_ccb(np, cp);
 432         sym_xpt_done(np, cmd);
 433         return 0;
 434 }
 435
 436
 437 /*
 438  *  timer daemon.
 439  *
 440  *  Misused to keep the driver running when
 441  *  interrupts are not configured correctly.
 442  */
 443 static void sym_timer(struct sym_hcb *np)
 444 {
 445         unsigned long thistime = jiffies;
 446
 447         /*
 448          *  Restart the timer.
 449          */
 450         np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
 451         add_timer(&np->s.timer);
 452
 453         /*
 454          *  If we are resetting the ncr, wait for settle_time before
 455          *  clearing it. Then command processing will be resumed.
 456          */
 457         if (np->s.settle_time_valid) {
 458                 if (time_before_eq(np->s.settle_time, thistime)) {
 459                         if (sym_verbose >= 2 )
 460                                 printk("%s: command processing resumed\n",
 461                                        sym_name(np));
 462                         np->s.settle_time_valid = 0;
 463                 }
 464                 return;
 465         }
 466
 467         /*
 468          *      Nothing to do for now, but that may come.
 469          */
 470         if (np->s.lasttime + 4*HZ < thistime) {
 471                 np->s.lasttime = thistime;
 472         }
 473
 474 #ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
 475         /*
 476          *  Some way-broken PCI bridges may lead to
 477          *  completions being lost when the clearing
 478          *  of the INTFLY flag by the CPU occurs
 479          *  concurrently with the chip raising this flag.
 480          *  If this ever happen, lost completions will
 481          * be reaped here.
 482          */
 483         sym_wakeup_done(np);
 484 #endif
 485 }
 486
 487
 488 /*
 489  *  PCI BUS error handler.
 490  */
 491 void sym_log_bus_error(struct Scsi_Host *shost)
 492 {
 493         struct sym_data *sym_data = shost_priv(shost);
 494         struct pci_dev *pdev = sym_data->pdev;
 495         unsigned short pci_sts;
 496         pci_read_config_word(pdev, PCI_STATUS, &pci_sts);
 497         if (pci_sts & 0xf900) {
 498                 pci_write_config_word(pdev, PCI_STATUS, pci_sts);
 499                 shost_printk(KERN_WARNING, shost,
 500                         "PCI bus error: status = 0x%04x\n", pci_sts & 0xf900);
 501         }
 502 }
 503
 504 /*
 505  * queuecommand method.  Entered with the host adapter lock held and
 506  * interrupts disabled.
 507  */
 508 static int sym53c8xx_queue_command_lck(struct scsi_cmnd *cmd,
 509                                         void (*done)(struct scsi_cmnd *))
 510 {
 511         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
 512         struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
 513         int sts = 0;
 514
 515         cmd->scsi_done = done;
 516         memset(ucp, 0, sizeof(*ucp));
 517
 518         /*
 519          *  Shorten our settle_time if needed for
 520          *  this command not to time out.
 521          */
 522         if (np->s.settle_time_valid && cmd->request->timeout) {
 523                 unsigned long tlimit = jiffies + cmd->request->timeout;
 524                 tlimit -= SYM_CONF_TIMER_INTERVAL*2;
 525                 if (time_after(np->s.settle_time, tlimit)) {
 526                         np->s.settle_time = tlimit;
 527                 }
 528         }
 529
 530         if (np->s.settle_time_valid)
 531                 return SCSI_MLQUEUE_HOST_BUSY;
 532
 533         sts = sym_queue_command(np, cmd);
 534         if (sts)
 535                 return SCSI_MLQUEUE_HOST_BUSY;
 536         return 0;
 537 }
 538
 539 static DEF_SCSI_QCMD(sym53c8xx_queue_command)
 540
 541 /*
 542  *  Linux entry point of the interrupt handler.
 543  */
 544 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id)
 545 {
 546         struct Scsi_Host *shost = dev_id;
 547         struct sym_data *sym_data = shost_priv(shost);
 548         irqreturn_t result;
 549
 550         /* Avoid spinloop trying to handle interrupts on frozen device */
 551         if (pci_channel_offline(sym_data->pdev))
 552                 return IRQ_NONE;
 553
 554         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
 555
 556         spin_lock(shost->host_lock);
 557         result = sym_interrupt(shost);
 558         spin_unlock(shost->host_lock);
 559
 560         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
 561
 562         return result;
 563 }
 564
 565 /*
 566  *  Linux entry point of the timer handler
 567  */
 568 static void sym53c8xx_timer(unsigned long npref)
 569 {
 570         struct sym_hcb *np = (struct sym_hcb *)npref;
 571         unsigned long flags;
 572
 573         spin_lock_irqsave(np->s.host->host_lock, flags);
 574         sym_timer(np);
 575         spin_unlock_irqrestore(np->s.host->host_lock, flags);
 576 }
 577
 578
 579 /*
 580  *  What the eh thread wants us to perform.
 581  */
 582 #define SYM_EH_ABORT            0
 583 #define SYM_EH_DEVICE_RESET     1
 584 #define SYM_EH_BUS_RESET        2
 585 #define SYM_EH_HOST_RESET       3
 586
 587 /*
 588  *  Generic method for our eh processing.
 589  *  The 'op' argument tells what we have to do.
 590  */
 591 static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
 592 {
 593         struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
 594         struct Scsi_Host *shost = cmd->device->host;
 595         struct sym_data *sym_data = shost_priv(shost);
 596         struct pci_dev *pdev = sym_data->pdev;
 597         struct sym_hcb *np = sym_data->ncb;
 598         SYM_QUEHEAD *qp;
 599         int cmd_queued = 0;
 600         int sts = -1;
 601         struct completion eh_done;
 602
 603         scmd_printk(KERN_WARNING, cmd, "%s operation started\n", opname);
 604
 605         /* We may be in an error condition because the PCI bus
 606          * went down. In this case, we need to wait until the
 607          * PCI bus is reset, the card is reset, and only then
 608          * proceed with the scsi error recovery.  There's no
 609          * point in hurrying; take a leisurely wait.
 610          */
 611 #define WAIT_FOR_PCI_RECOVERY   35
 612         if (pci_channel_offline(pdev)) {
 613                 int finished_reset = 0;
 614                 init_completion(&eh_done);
 615                 spin_lock_irq(shost->host_lock);
 616                 /* Make sure we didn't race */
 617                 if (pci_channel_offline(pdev)) {
 618                         BUG_ON(sym_data->io_reset);
 619                         sym_data->io_reset = &eh_done;
 620                 } else {
 621                         finished_reset = 1;
 622                 }
 623                 spin_unlock_irq(shost->host_lock);
 624                 if (!finished_reset)
 625                         finished_reset = wait_for_completion_timeout
 626                                                 (sym_data->io_reset,
 627                                                 WAIT_FOR_PCI_RECOVERY*HZ);
 628                 spin_lock_irq(shost->host_lock);
 629                 sym_data->io_reset = NULL;
 630                 spin_unlock_irq(shost->host_lock);
 631                 if (!finished_reset)
 632                         return SCSI_FAILED;
 633         }
 634
 635         spin_lock_irq(shost->host_lock);
 636         /* This one is queued in some place -> to wait for completion */
 637         FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
 638                 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
 639                 if (cp->cmd == cmd) {
 640                         cmd_queued = 1;
 641                         break;
 642                 }
 643         }
 644
 645         /* Try to proceed the operation we have been asked for */
 646         sts = -1;
 647         switch(op) {
 648         case SYM_EH_ABORT:
 649                 sts = sym_abort_scsiio(np, cmd, 1);
 650                 break;
 651         case SYM_EH_DEVICE_RESET:
 652                 sts = sym_reset_scsi_target(np, cmd->device->id);
 653                 break;
 654         case SYM_EH_BUS_RESET:
 655                 sym_reset_scsi_bus(np, 1);
 656                 sts = 0;
 657                 break;
 658         case SYM_EH_HOST_RESET:
 659                 sym_reset_scsi_bus(np, 0);
 660                 sym_start_up(shost, 1);
 661                 sts = 0;
 662                 break;
 663         default:
 664                 break;
 665         }
 666
 667         /* On error, restore everything and cross fingers :) */
 668         if (sts)
 669                 cmd_queued = 0;
 670
 671         if (cmd_queued) {
 672                 init_completion(&eh_done);
 673                 ucmd->eh_done = &eh_done;
 674                 spin_unlock_irq(shost->host_lock);
 675                 if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
 676                         ucmd->eh_done = NULL;
 677                         sts = -2;
 678                 }
 679         } else {
 680                 spin_unlock_irq(shost->host_lock);
 681         }
 682
 683         dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
 684                         sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
 685         return sts ? SCSI_FAILED : SCSI_SUCCESS;
 686 }
 687
 688
 689 /*
 690  * Error handlers called from the eh thread (one thread per HBA).
 691  */
 692 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
 693 {
 694         return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
 695 }
 696
 697 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
 698 {
 699         return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
 700 }
 701
 702 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
 703 {
 704         return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
 705 }
 706
 707 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
 708 {
 709         return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
 710 }
 711
 712 /*
 713  *  Tune device queuing depth, according to various limits.
 714  */
 715 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
 716 {
 717         struct sym_lcb *lp = sym_lp(tp, lun);
 718         u_short oldtags;
 719
 720         if (!lp)
 721                 return;
 722
 723         oldtags = lp->s.reqtags;
 724
 725         if (reqtags > lp->s.scdev_depth)
 726                 reqtags = lp->s.scdev_depth;
 727
 728         lp->s.reqtags     = reqtags;
 729
 730         if (reqtags != oldtags) {
 731                 dev_info(&tp->starget->dev,
 732                          "tagged command queuing %s, command queue depth %d.\n",
 733                           lp->s.reqtags ? "enabled" : "disabled", reqtags);
 734         }
 735 }
 736
 737 static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
 738 {
 739         struct sym_hcb *np = sym_get_hcb(sdev->host);
 740         struct sym_tcb *tp = &np->target[sdev->id];
 741         struct sym_lcb *lp;
 742         unsigned long flags;
 743         int error;
 744
 745         if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
 746                 return -ENXIO;
 747
 748         spin_lock_irqsave(np->s.host->host_lock, flags);
 749
 750         /*
 751          * Fail the device init if the device is flagged NOSCAN at BOOT in
 752          * the NVRAM.  This may speed up boot and maintain coherency with
 753          * BIOS device numbering.  Clearing the flag allows the user to
 754          * rescan skipped devices later.  We also return an error for
 755          * devices not flagged for SCAN LUNS in the NVRAM since some single
 756          * lun devices behave badly when asked for a non zero LUN.
 757          */
 758
 759         if (tp->usrflags & SYM_SCAN_BOOT_DISABLED) {
 760                 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
 761                 starget_printk(KERN_INFO, sdev->sdev_target,
 762                                 "Scan at boot disabled in NVRAM\n");
 763                 error = -ENXIO;
 764                 goto out;
 765         }
 766
 767         if (tp->usrflags & SYM_SCAN_LUNS_DISABLED) {
 768                 if (sdev->lun != 0) {
 769                         error = -ENXIO;
 770                         goto out;
 771                 }
 772                 starget_printk(KERN_INFO, sdev->sdev_target,
 773                                 "Multiple LUNs disabled in NVRAM\n");
 774         }
 775
 776         lp = sym_alloc_lcb(np, sdev->id, sdev->lun);
 777         if (!lp) {
 778                 error = -ENOMEM;
 779                 goto out;
 780         }
 781         if (tp->nlcb == 1)
 782                 tp->starget = sdev->sdev_target;
 783
 784         spi_min_period(tp->starget) = tp->usr_period;
 785         spi_max_width(tp->starget) = tp->usr_width;
 786
 787         error = 0;
 788 out:
 789         spin_unlock_irqrestore(np->s.host->host_lock, flags);
 790
 791         return error;
 792 }
 793
 794 /*
 795  * Linux entry point for device queue sizing.
 796  */
 797 static int sym53c8xx_slave_configure(struct scsi_device *sdev)
 798 {
 799         struct sym_hcb *np = sym_get_hcb(sdev->host);
 800         struct sym_tcb *tp = &np->target[sdev->id];
 801         struct sym_lcb *lp = sym_lp(tp, sdev->lun);
 802         int reqtags, depth_to_use;
 803
 804         /*
 805          *  Get user flags.
 806          */
 807         lp->curr_flags = lp->user_flags;
 808
 809         /*
 810          *  Select queue depth from driver setup.
 811          *  Do not use more than configured by user.
 812          *  Use at least 1.
 813          *  Do not use more than our maximum.
 814          */
 815         reqtags = sym_driver_setup.max_tag;
 816         if (reqtags > tp->usrtags)
 817                 reqtags = tp->usrtags;
 818         if (!sdev->tagged_supported)
 819                 reqtags = 0;
 820         if (reqtags > SYM_CONF_MAX_TAG)
 821                 reqtags = SYM_CONF_MAX_TAG;
 822         depth_to_use = reqtags ? reqtags : 1;
 823         scsi_change_queue_depth(sdev, depth_to_use);
 824         lp->s.scdev_depth = depth_to_use;
 825         sym_tune_dev_queuing(tp, sdev->lun, reqtags);
 826
 827         if (!spi_initial_dv(sdev->sdev_target))
 828                 spi_dv_device(sdev);
 829
 830         return 0;
 831 }
 832
 833 static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
 834 {
 835         struct sym_hcb *np = sym_get_hcb(sdev->host);
 836         struct sym_tcb *tp = &np->target[sdev->id];
 837         struct sym_lcb *lp = sym_lp(tp, sdev->lun);
 838         unsigned long flags;
 839
 840         /* if slave_alloc returned before allocating a sym_lcb, return */
 841         if (!lp)
 842                 return;
 843
 844         spin_lock_irqsave(np->s.host->host_lock, flags);
 845
 846         if (lp->busy_itlq || lp->busy_itl) {
 847                 /*
 848                  * This really shouldn't happen, but we can't return an error
 849                  * so let's try to stop all on-going I/O.
 850                  */
 851                 starget_printk(KERN_WARNING, tp->starget,
 852                                "Removing busy LCB (%d)\n", (u8)sdev->lun);
 853                 sym_reset_scsi_bus(np, 1);
 854         }
 855
 856         if (sym_free_lcb(np, sdev->id, sdev->lun) == 0) {
 857                 /*
 858                  * It was the last unit for this target.
 859                  */
 860                 tp->head.sval        = 0;
 861                 tp->head.wval        = np->rv_scntl3;
 862                 tp->head.uval        = 0;
 863                 tp->tgoal.check_nego = 1;
 864                 tp->starget          = NULL;
 865         }
 866
 867         spin_unlock_irqrestore(np->s.host->host_lock, flags);
 868 }
 869
 870 /*
 871  *  Linux entry point for info() function
 872  */
 873 static const char *sym53c8xx_info (struct Scsi_Host *host)
 874 {
 875         return SYM_DRIVER_NAME;
 876 }
 877
 878
 879 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
 880 /*
 881  *  Proc file system stuff
 882  *
 883  *  A read operation returns adapter information.
 884  *  A write operation is a control command.
 885  *  The string is parsed in the driver code and the command is passed
 886  *  to the sym_usercmd() function.
 887  */
 888
 889 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
 890
 891 struct  sym_usrcmd {
 892         u_long  target;
 893         u_long  lun;
 894         u_long  data;
 895         u_long  cmd;
 896 };
 897
 898 #define UC_SETSYNC      10
 899 #define UC_SETTAGS      11
 900 #define UC_SETDEBUG     12
 901 #define UC_SETWIDE      14
 902 #define UC_SETFLAG      15
 903 #define UC_SETVERBOSE   17
 904 #define UC_RESETDEV     18
 905 #define UC_CLEARDEV     19
 906
 907 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
 908 {
 909         struct sym_tcb *tp;
 910         int t, l;
 911
 912         switch (uc->cmd) {
 913         case 0: return;
 914
 915 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
 916         case UC_SETDEBUG:
 917                 sym_debug_flags = uc->data;
 918                 break;
 919 #endif
 920         case UC_SETVERBOSE:
 921                 np->verbose = uc->data;
 922                 break;
 923         default:
 924                 /*
 925                  * We assume that other commands apply to targets.
 926                  * This should always be the case and avoid the below
 927                  * 4 lines to be repeated 6 times.
 928                  */
 929                 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
 930                         if (!((uc->target >> t) & 1))
 931                                 continue;
 932                         tp = &np->target[t];
 933                         if (!tp->nlcb)
 934                                 continue;
 935
 936                         switch (uc->cmd) {
 937
 938                         case UC_SETSYNC:
 939                                 if (!uc->data || uc->data >= 255) {
 940                                         tp->tgoal.iu = tp->tgoal.dt =
 941                                                 tp->tgoal.qas = 0;
 942                                         tp->tgoal.offset = 0;
 943                                 } else if (uc->data <= 9 && np->minsync_dt) {
 944                                         if (uc->data < np->minsync_dt)
 945                                                 uc->data = np->minsync_dt;
 946                                         tp->tgoal.iu = tp->tgoal.dt =
 947                                                 tp->tgoal.qas = 1;
 948                                         tp->tgoal.width = 1;
 949                                         tp->tgoal.period = uc->data;
 950                                         tp->tgoal.offset = np->maxoffs_dt;
 951                                 } else {
 952                                         if (uc->data < np->minsync)
 953                                                 uc->data = np->minsync;
 954                                         tp->tgoal.iu = tp->tgoal.dt =
 955                                                 tp->tgoal.qas = 0;
 956                                         tp->tgoal.period = uc->data;
 957                                         tp->tgoal.offset = np->maxoffs;
 958                                 }
 959                                 tp->tgoal.check_nego = 1;
 960                                 break;
 961                         case UC_SETWIDE:
 962                                 tp->tgoal.width = uc->data ? 1 : 0;
 963                                 tp->tgoal.check_nego = 1;
 964                                 break;
 965                         case UC_SETTAGS:
 966                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
 967                                         sym_tune_dev_queuing(tp, l, uc->data);
 968                                 break;
 969                         case UC_RESETDEV:
 970                                 tp->to_reset = 1;
 971                                 np->istat_sem = SEM;
 972                                 OUTB(np, nc_istat, SIGP|SEM);
 973                                 break;
 974                         case UC_CLEARDEV:
 975                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
 976                                         struct sym_lcb *lp = sym_lp(tp, l);
 977                                         if (lp) lp->to_clear = 1;
 978                                 }
 979                                 np->istat_sem = SEM;
 980                                 OUTB(np, nc_istat, SIGP|SEM);
 981                                 break;
 982                         case UC_SETFLAG:
 983                                 tp->usrflags = uc->data;
 984                                 break;
 985                         }
 986                 }
 987                 break;
 988         }
 989 }
 990
 991 static int sym_skip_spaces(char *ptr, int len)
 992 {
 993         int cnt, c;
 994
 995         for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
 996
 997         return (len - cnt);
 998 }
 999
1000 static int get_int_arg(char *ptr, int len, u_long *pv)
1001 {
1002         char *end;
1003
1004         *pv = simple_strtoul(ptr, &end, 10);
1005         return (end - ptr);
1006 }
1007
1008 static int is_keyword(char *ptr, int len, char *verb)
1009 {
1010         int verb_len = strlen(verb);
1011
1012         if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1013                 return verb_len;
1014         else
1015                 return 0;
1016 }
1017
1018 #define SKIP_SPACES(ptr, len)                                           \
1019         if ((arg_len = sym_skip_spaces(ptr, len)) < 1)                  \
1020                 return -EINVAL;                                         \
1021         ptr += arg_len; len -= arg_len;
1022
1023 #define GET_INT_ARG(ptr, len, v)                                        \
1024         if (!(arg_len = get_int_arg(ptr, len, &(v))))                   \
1025                 return -EINVAL;                                         \
1026         ptr += arg_len; len -= arg_len;
1027
1028
1029 /*
1030  * Parse a control command
1031  */
1032
1033 static int sym_user_command(struct Scsi_Host *shost, char *buffer, int length)
1034 {
1035         struct sym_hcb *np = sym_get_hcb(shost);
1036         char *ptr       = buffer;
1037         int len         = length;
1038         struct sym_usrcmd cmd, *uc = &cmd;
1039         int             arg_len;
1040         u_long          target;
1041
1042         memset(uc, 0, sizeof(*uc));
1043
1044         if (len > 0 && ptr[len-1] == '\n')
1045                 --len;
1046
1047         if      ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1048                 uc->cmd = UC_SETSYNC;
1049         else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1050                 uc->cmd = UC_SETTAGS;
1051         else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1052                 uc->cmd = UC_SETVERBOSE;
1053         else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1054                 uc->cmd = UC_SETWIDE;
1055 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1056         else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1057                 uc->cmd = UC_SETDEBUG;
1058 #endif
1059         else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1060                 uc->cmd = UC_SETFLAG;
1061         else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1062                 uc->cmd = UC_RESETDEV;
1063         else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1064                 uc->cmd = UC_CLEARDEV;
1065         else
1066                 arg_len = 0;
1067
1068 #ifdef DEBUG_PROC_INFO
1069 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1070 #endif
1071
1072         if (!arg_len)
1073                 return -EINVAL;
1074         ptr += arg_len; len -= arg_len;
1075
1076         switch(uc->cmd) {
1077         case UC_SETSYNC:
1078         case UC_SETTAGS:
1079         case UC_SETWIDE:
1080         case UC_SETFLAG:
1081         case UC_RESETDEV:
1082         case UC_CLEARDEV:
1083                 SKIP_SPACES(ptr, len);
1084                 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1085                         ptr += arg_len; len -= arg_len;
1086                         uc->target = ~0;
1087                 } else {
1088                         GET_INT_ARG(ptr, len, target);
1089                         uc->target = (1<<target);
1090 #ifdef DEBUG_PROC_INFO
1091 printk("sym_user_command: target=%ld\n", target);
1092 #endif
1093                 }
1094                 break;
1095         }
1096
1097         switch(uc->cmd) {
1098         case UC_SETVERBOSE:
1099         case UC_SETSYNC:
1100         case UC_SETTAGS:
1101         case UC_SETWIDE:
1102                 SKIP_SPACES(ptr, len);
1103                 GET_INT_ARG(ptr, len, uc->data);
1104 #ifdef DEBUG_PROC_INFO
1105 printk("sym_user_command: data=%ld\n", uc->data);
1106 #endif
1107                 break;
1108 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1109         case UC_SETDEBUG:
1110                 while (len > 0) {
1111                         SKIP_SPACES(ptr, len);
1112                         if      ((arg_len = is_keyword(ptr, len, "alloc")))
1113                                 uc->data |= DEBUG_ALLOC;
1114                         else if ((arg_len = is_keyword(ptr, len, "phase")))
1115                                 uc->data |= DEBUG_PHASE;
1116                         else if ((arg_len = is_keyword(ptr, len, "queue")))
1117                                 uc->data |= DEBUG_QUEUE;
1118                         else if ((arg_len = is_keyword(ptr, len, "result")))
1119                                 uc->data |= DEBUG_RESULT;
1120                         else if ((arg_len = is_keyword(ptr, len, "scatter")))
1121                                 uc->data |= DEBUG_SCATTER;
1122                         else if ((arg_len = is_keyword(ptr, len, "script")))
1123                                 uc->data |= DEBUG_SCRIPT;
1124                         else if ((arg_len = is_keyword(ptr, len, "tiny")))
1125                                 uc->data |= DEBUG_TINY;
1126                         else if ((arg_len = is_keyword(ptr, len, "timing")))
1127                                 uc->data |= DEBUG_TIMING;
1128                         else if ((arg_len = is_keyword(ptr, len, "nego")))
1129                                 uc->data |= DEBUG_NEGO;
1130                         else if ((arg_len = is_keyword(ptr, len, "tags")))
1131                                 uc->data |= DEBUG_TAGS;
1132                         else if ((arg_len = is_keyword(ptr, len, "pointer")))
1133                                 uc->data |= DEBUG_POINTER;
1134                         else
1135                                 return -EINVAL;
1136                         ptr += arg_len; len -= arg_len;
1137                 }
1138 #ifdef DEBUG_PROC_INFO
1139 printk("sym_user_command: data=%ld\n", uc->data);
1140 #endif
1141                 break;
1142 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1143         case UC_SETFLAG:
1144                 while (len > 0) {
1145                         SKIP_SPACES(ptr, len);
1146                         if      ((arg_len = is_keyword(ptr, len, "no_disc")))
1147                                 uc->data &= ~SYM_DISC_ENABLED;
1148                         else
1149                                 return -EINVAL;
1150                         ptr += arg_len; len -= arg_len;
1151                 }
1152                 break;
1153         default:
1154                 break;
1155         }
1156
1157         if (len)
1158                 return -EINVAL;
1159         else {
1160                 unsigned long flags;
1161
1162                 spin_lock_irqsave(shost->host_lock, flags);
1163                 sym_exec_user_command(np, uc);
1164                 spin_unlock_irqrestore(shost->host_lock, flags);
1165         }
1166         return length;
1167 }
1168
1169 #endif  /* SYM_LINUX_USER_COMMAND_SUPPORT */
1170
1171
1172 /*
1173  *  Copy formatted information into the input buffer.
1174  */
1175 static int sym_show_info(struct seq_file *m, struct Scsi_Host *shost)
1176 {
1177 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1178         struct sym_data *sym_data = shost_priv(shost);
1179         struct pci_dev *pdev = sym_data->pdev;
1180         struct sym_hcb *np = sym_data->ncb;
1181
1182         seq_printf(m, "Chip " NAME53C "%s, device id 0x%x, "
1183                  "revision id 0x%x\n", np->s.chip_name,
1184                  pdev->device, pdev->revision);
1185         seq_printf(m, "At PCI address %s, IRQ %u\n",
1186                          pci_name(pdev), pdev->irq);
1187         seq_printf(m, "Min. period factor %d, %s SCSI BUS%s\n",
1188                  (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1189                  np->maxwide ? "Wide" : "Narrow",
1190                  np->minsync_dt ? ", DT capable" : "");
1191
1192         seq_printf(m, "Max. started commands %d, "
1193                  "max. commands per LUN %d\n",
1194                  SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1195
1196         return 0;
1197 #else
1198         return -EINVAL;
1199 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1200 }
1201
1202 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1203
1204 /*
1205  * Free resources claimed by sym_iomap_device().  Note that
1206  * sym_free_resources() should be used instead of this function after calling
1207  * sym_attach().
1208  */
1209 static void sym_iounmap_device(struct sym_device *device)
1210 {
1211         if (device->s.ioaddr)
1212                 pci_iounmap(device->pdev, device->s.ioaddr);
1213         if (device->s.ramaddr)
1214                 pci_iounmap(device->pdev, device->s.ramaddr);
1215 }
1216
1217 /*
1218  *      Free controller resources.
1219  */
1220 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev,
1221                 int do_free_irq)
1222 {
1223         /*
1224          *  Free O/S specific resources.
1225          */
1226         if (do_free_irq)
1227                 free_irq(pdev->irq, np->s.host);
1228         if (np->s.ioaddr)
1229                 pci_iounmap(pdev, np->s.ioaddr);
1230         if (np->s.ramaddr)
1231                 pci_iounmap(pdev, np->s.ramaddr);
1232         /*
1233          *  Free O/S independent resources.
1234          */
1235         sym_hcb_free(np);
1236
1237         sym_mfree_dma(np, sizeof(*np), "HCB");
1238 }
1239
1240 /*
1241  *  Host attach and initialisations.
1242  *
1243  *  Allocate host data and ncb structure.
1244  *  Remap MMIO region.
1245  *  Do chip initialization.
1246  *  If all is OK, install interrupt handling and
1247  *  start the timer daemon.
1248  */
1249 static struct Scsi_Host *sym_attach(struct scsi_host_template *tpnt, int unit,
1250                                     struct sym_device *dev)
1251 {
1252         struct sym_data *sym_data;
1253         struct sym_hcb *np = NULL;
1254         struct Scsi_Host *shost = NULL;
1255         struct pci_dev *pdev = dev->pdev;
1256         unsigned long flags;
1257         struct sym_fw *fw;
1258         int do_free_irq = 0;
1259
1260         printk(KERN_INFO "sym%d: <%s> rev 0x%x at pci %s irq %u\n",
1261                 unit, dev->chip.name, pdev->revision, pci_name(pdev),
1262                 pdev->irq);
1263
1264         /*
1265          *  Get the firmware for this chip.
1266          */
1267         fw = sym_find_firmware(&dev->chip);
1268         if (!fw)
1269                 goto attach_failed;
1270
1271         shost = scsi_host_alloc(tpnt, sizeof(*sym_data));
1272         if (!shost)
1273                 goto attach_failed;
1274         sym_data = shost_priv(shost);
1275
1276         /*
1277          *  Allocate immediately the host control block,
1278          *  since we are only expecting to succeed. :)
1279          *  We keep track in the HCB of all the resources that
1280          *  are to be released on error.
1281          */
1282         np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1283         if (!np)
1284                 goto attach_failed;
1285         np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1286         sym_data->ncb = np;
1287         sym_data->pdev = pdev;
1288         np->s.host = shost;
1289
1290         pci_set_drvdata(pdev, shost);
1291
1292         /*
1293          *  Copy some useful infos to the HCB.
1294          */
1295         np->hcb_ba      = vtobus(np);
1296         np->verbose     = sym_driver_setup.verbose;
1297         np->s.unit      = unit;
1298         np->features    = dev->chip.features;
1299         np->clock_divn  = dev->chip.nr_divisor;
1300         np->maxoffs     = dev->chip.offset_max;
1301         np->maxburst    = dev->chip.burst_max;
1302         np->myaddr      = dev->host_id;
1303         np->mmio_ba     = (u32)dev->mmio_base;
1304         np->ram_ba      = (u32)dev->ram_base;
1305         np->s.ioaddr    = dev->s.ioaddr;
1306         np->s.ramaddr   = dev->s.ramaddr;
1307
1308         /*
1309          *  Edit its name.
1310          */
1311         strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1312         sprintf(np->s.inst_name, "sym%d", np->s.unit);
1313
1314         if ((SYM_CONF_DMA_ADDRESSING_MODE > 0) && (np->features & FE_DAC) &&
1315                         !pci_set_dma_mask(pdev, DMA_DAC_MASK)) {
1316                 set_dac(np);
1317         } else if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
1318                 printf_warning("%s: No suitable DMA available\n", sym_name(np));
1319                 goto attach_failed;
1320         }
1321
1322         if (sym_hcb_attach(shost, fw, dev->nvram))
1323                 goto attach_failed;
1324
1325         /*
1326          *  Install the interrupt handler.
1327          *  If we synchonize the C code with SCRIPTS on interrupt,
1328          *  we do not want to share the INTR line at all.
1329          */
1330         if (request_irq(pdev->irq, sym53c8xx_intr, IRQF_SHARED, NAME53C8XX,
1331                         shost)) {
1332                 printf_err("%s: request irq %u failure\n",
1333                         sym_name(np), pdev->irq);
1334                 goto attach_failed;
1335         }
1336         do_free_irq = 1;
1337
1338         /*
1339          *  After SCSI devices have been opened, we cannot
1340          *  reset the bus safely, so we do it here.
1341          */
1342         spin_lock_irqsave(shost->host_lock, flags);
1343         if (sym_reset_scsi_bus(np, 0))
1344                 goto reset_failed;
1345
1346         /*
1347          *  Start the SCRIPTS.
1348          */
1349         sym_start_up(shost, 1);
1350
1351         /*
1352          *  Start the timer daemon
1353          */
1354         init_timer(&np->s.timer);
1355         np->s.timer.data     = (unsigned long) np;
1356         np->s.timer.function = sym53c8xx_timer;
1357         np->s.lasttime=0;
1358         sym_timer (np);
1359
1360         /*
1361          *  Fill Linux host instance structure
1362          *  and return success.
1363          */
1364         shost->max_channel      = 0;
1365         shost->this_id          = np->myaddr;
1366         shost->max_id           = np->maxwide ? 16 : 8;
1367         shost->max_lun          = SYM_CONF_MAX_LUN;
1368         shost->unique_id        = pci_resource_start(pdev, 0);
1369         shost->cmd_per_lun      = SYM_CONF_MAX_TAG;
1370         shost->can_queue        = (SYM_CONF_MAX_START-2);
1371         shost->sg_tablesize     = SYM_CONF_MAX_SG;
1372         shost->max_cmd_len      = 16;
1373         BUG_ON(sym2_transport_template == NULL);
1374         shost->transportt       = sym2_transport_template;
1375
1376         /* 53c896 rev 1 errata: DMA may not cross 16MB boundary */
1377         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 2)
1378                 shost->dma_boundary = 0xFFFFFF;
1379
1380         spin_unlock_irqrestore(shost->host_lock, flags);
1381
1382         return shost;
1383
1384  reset_failed:
1385         printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1386                    "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1387         spin_unlock_irqrestore(shost->host_lock, flags);
1388  attach_failed:
1389         printf_info("sym%d: giving up ...\n", unit);
1390         if (np)
1391                 sym_free_resources(np, pdev, do_free_irq);
1392         else
1393                 sym_iounmap_device(dev);
1394         if (shost)
1395                 scsi_host_put(shost);
1396
1397         return NULL;
1398  }
1399
1400
1401 /*
1402  *    Detect and try to read SYMBIOS and TEKRAM NVRAM.
1403  */
1404 #if SYM_CONF_NVRAM_SUPPORT
1405 static void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1406 {
1407         devp->nvram = nvp;
1408         nvp->type = 0;
1409
1410         sym_read_nvram(devp, nvp);
1411 }
1412 #else
1413 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1414 {
1415 }
1416 #endif  /* SYM_CONF_NVRAM_SUPPORT */
1417
1418 static int sym_check_supported(struct sym_device *device)
1419 {
1420         struct sym_chip *chip;
1421         struct pci_dev *pdev = device->pdev;
1422         unsigned long io_port = pci_resource_start(pdev, 0);
1423         int i;
1424
1425         /*
1426          *  If user excluded this chip, do not initialize it.
1427          *  I hate this code so much.  Must kill it.
1428          */
1429         if (io_port) {
1430                 for (i = 0 ; i < 8 ; i++) {
1431                         if (sym_driver_setup.excludes[i] == io_port)
1432                                 return -ENODEV;
1433                 }
1434         }
1435
1436         /*
1437          * Check if the chip is supported.  Then copy the chip description
1438          * to our device structure so we can make it match the actual device
1439          * and options.
1440          */
1441         chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1442         if (!chip) {
1443                 dev_info(&pdev->dev, "device not supported\n");
1444                 return -ENODEV;
1445         }
1446         memcpy(&device->chip, chip, sizeof(device->chip));
1447
1448         return 0;
1449 }
1450
1451 /*
1452  * Ignore Symbios chips controlled by various RAID controllers.
1453  * These controllers set value 0x52414944 at RAM end - 16.
1454  */
1455 static int sym_check_raid(struct sym_device *device)
1456 {
1457         unsigned int ram_size, ram_val;
1458
1459         if (!device->s.ramaddr)
1460                 return 0;
1461
1462         if (device->chip.features & FE_RAM8K)
1463                 ram_size = 8192;
1464         else
1465                 ram_size = 4096;
1466
1467         ram_val = readl(device->s.ramaddr + ram_size - 16);
1468         if (ram_val != 0x52414944)
1469                 return 0;
1470
1471         dev_info(&device->pdev->dev,
1472                         "not initializing, driven by RAID controller.\n");
1473         return -ENODEV;
1474 }
1475
1476 static int sym_set_workarounds(struct sym_device *device)
1477 {
1478         struct sym_chip *chip = &device->chip;
1479         struct pci_dev *pdev = device->pdev;
1480         u_short status_reg;
1481
1482         /*
1483          *  (ITEM 12 of a DEL about the 896 I haven't yet).
1484          *  We must ensure the chip will use WRITE AND INVALIDATE.
1485          *  The revision number limit is for now arbitrary.
1486          */
1487         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 0x4) {
1488                 chip->features  |= (FE_WRIE | FE_CLSE);
1489         }
1490
1491         /* If the chip can do Memory Write Invalidate, enable it */
1492         if (chip->features & FE_WRIE) {
1493                 if (pci_set_mwi(pdev))
1494                         return -ENODEV;
1495         }
1496
1497         /*
1498          *  Work around for errant bit in 895A. The 66Mhz
1499          *  capable bit is set erroneously. Clear this bit.
1500          *  (Item 1 DEL 533)
1501          *
1502          *  Make sure Config space and Features agree.
1503          *
1504          *  Recall: writes are not normal to status register -
1505          *  write a 1 to clear and a 0 to leave unchanged.
1506          *  Can only reset bits.
1507          */
1508         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1509         if (chip->features & FE_66MHZ) {
1510                 if (!(status_reg & PCI_STATUS_66MHZ))
1511                         chip->features &= ~FE_66MHZ;
1512         } else {
1513                 if (status_reg & PCI_STATUS_66MHZ) {
1514                         status_reg = PCI_STATUS_66MHZ;
1515                         pci_write_config_word(pdev, PCI_STATUS, status_reg);
1516                         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1517                 }
1518         }
1519
1520         return 0;
1521 }
1522
1523 /*
1524  * Map HBA registers and on-chip SRAM (if present).
1525  */
1526 static int sym_iomap_device(struct sym_device *device)
1527 {
1528         struct pci_dev *pdev = device->pdev;
1529         struct pci_bus_region bus_addr;
1530         int i = 2;
1531
1532         pcibios_resource_to_bus(pdev->bus, &bus_addr, &pdev->resource[1]);
1533         device->mmio_base = bus_addr.start;
1534
1535         if (device->chip.features & FE_RAM) {
1536                 /*
1537                  * If the BAR is 64-bit, resource 2 will be occupied by the
1538                  * upper 32 bits
1539                  */
1540                 if (!pdev->resource[i].flags)
1541                         i++;
1542                 pcibios_resource_to_bus(pdev->bus, &bus_addr,
1543                                         &pdev->resource[i]);
1544                 device->ram_base = bus_addr.start;
1545         }
1546
1547 #ifdef CONFIG_SCSI_SYM53C8XX_MMIO
1548         if (device->mmio_base)
1549                 device->s.ioaddr = pci_iomap(pdev, 1,
1550                                                 pci_resource_len(pdev, 1));
1551 #endif
1552         if (!device->s.ioaddr)
1553                 device->s.ioaddr = pci_iomap(pdev, 0,
1554                                                 pci_resource_len(pdev, 0));
1555         if (!device->s.ioaddr) {
1556                 dev_err(&pdev->dev, "could not map registers; giving up.\n");
1557                 return -EIO;
1558         }
1559         if (device->ram_base) {
1560                 device->s.ramaddr = pci_iomap(pdev, i,
1561                                                 pci_resource_len(pdev, i));
1562                 if (!device->s.ramaddr) {
1563                         dev_warn(&pdev->dev,
1564                                 "could not map SRAM; continuing anyway.\n");
1565                         device->ram_base = 0;
1566                 }
1567         }
1568
1569         return 0;
1570 }
1571
1572 /*
1573  * The NCR PQS and PDS cards are constructed as a DEC bridge
1574  * behind which sits a proprietary NCR memory controller and
1575  * either four or two 53c875s as separate devices.  We can tell
1576  * if an 875 is part of a PQS/PDS or not since if it is, it will
1577  * be on the same bus as the memory controller.  In its usual
1578  * mode of operation, the 875s are slaved to the memory
1579  * controller for all transfers.  To operate with the Linux
1580  * driver, the memory controller is disabled and the 875s
1581  * freed to function independently.  The only wrinkle is that
1582  * the preset SCSI ID (which may be zero) must be read in from
1583  * a special configuration space register of the 875.
1584  */
1585 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1586 {
1587         int slot;
1588         u8 tmp;
1589
1590         for (slot = 0; slot < 256; slot++) {
1591                 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1592
1593                 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1594                         pci_dev_put(memc);
1595                         continue;
1596                 }
1597
1598                 /* bit 1: allow individual 875 configuration */
1599                 pci_read_config_byte(memc, 0x44, &tmp);
1600                 if ((tmp & 0x2) == 0) {
1601                         tmp |= 0x2;
1602                         pci_write_config_byte(memc, 0x44, tmp);
1603                 }
1604
1605                 /* bit 2: drive individual 875 interrupts to the bus */
1606                 pci_read_config_byte(memc, 0x45, &tmp);
1607                 if ((tmp & 0x4) == 0) {
1608                         tmp |= 0x4;
1609                         pci_write_config_byte(memc, 0x45, tmp);
1610                 }
1611
1612                 pci_dev_put(memc);
1613                 break;
1614         }
1615
1616         pci_read_config_byte(pdev, 0x84, &tmp);
1617         sym_dev->host_id = tmp;
1618 }
1619
1620 /*
1621  *  Called before unloading the module.
1622  *  Detach the host.
1623  *  We have to free resources and halt the NCR chip.
1624  */
1625 static int sym_detach(struct Scsi_Host *shost, struct pci_dev *pdev)
1626 {
1627         struct sym_hcb *np = sym_get_hcb(shost);
1628         printk("%s: detaching ...\n", sym_name(np));
1629
1630         del_timer_sync(&np->s.timer);
1631
1632         /*
1633          * Reset NCR chip.
1634          * We should use sym_soft_reset(), but we don't want to do
1635          * so, since we may not be safe if interrupts occur.
1636          */
1637         printk("%s: resetting chip\n", sym_name(np));
1638         OUTB(np, nc_istat, SRST);
1639         INB(np, nc_mbox1);
1640         udelay(10);
1641         OUTB(np, nc_istat, 0);
1642
1643         sym_free_resources(np, pdev, 1);
1644         scsi_host_put(shost);
1645
1646         return 1;
1647 }
1648
1649 /*
1650  * Driver host template.
1651  */
1652 static struct scsi_host_template sym2_template = {
1653         .module                 = THIS_MODULE,
1654         .name                   = "sym53c8xx",
1655         .info                   = sym53c8xx_info,
1656         .queuecommand           = sym53c8xx_queue_command,
1657         .slave_alloc            = sym53c8xx_slave_alloc,
1658         .slave_configure        = sym53c8xx_slave_configure,
1659         .slave_destroy          = sym53c8xx_slave_destroy,
1660         .eh_abort_handler       = sym53c8xx_eh_abort_handler,
1661         .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1662         .eh_bus_reset_handler   = sym53c8xx_eh_bus_reset_handler,
1663         .eh_host_reset_handler  = sym53c8xx_eh_host_reset_handler,
1664         .this_id                = 7,
1665         .use_clustering         = ENABLE_CLUSTERING,
1666         .max_sectors            = 0xFFFF,
1667 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1668         .show_info              = sym_show_info,
1669 #ifdef  SYM_LINUX_USER_COMMAND_SUPPORT
1670         .write_info             = sym_user_command,
1671 #endif
1672         .proc_name              = NAME53C8XX,
1673 #endif
1674 };
1675
1676 static int attach_count;
1677
1678 static int sym2_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1679 {
1680         struct sym_device sym_dev;
1681         struct sym_nvram nvram;
1682         struct Scsi_Host *shost;
1683         int do_iounmap = 0;
1684         int do_disable_device = 1;
1685
1686         memset(&sym_dev, 0, sizeof(sym_dev));
1687         memset(&nvram, 0, sizeof(nvram));
1688         sym_dev.pdev = pdev;
1689         sym_dev.host_id = SYM_SETUP_HOST_ID;
1690
1691         if (pci_enable_device(pdev))
1692                 goto leave;
1693
1694         pci_set_master(pdev);
1695
1696         if (pci_request_regions(pdev, NAME53C8XX))
1697                 goto disable;
1698
1699         if (sym_check_supported(&sym_dev))
1700                 goto free;
1701
1702         if (sym_iomap_device(&sym_dev))
1703                 goto free;
1704         do_iounmap = 1;
1705
1706         if (sym_check_raid(&sym_dev)) {
1707                 do_disable_device = 0;  /* Don't disable the device */
1708                 goto free;
1709         }
1710
1711         if (sym_set_workarounds(&sym_dev))
1712                 goto free;
1713
1714         sym_config_pqs(pdev, &sym_dev);
1715
1716         sym_get_nvram(&sym_dev, &nvram);
1717
1718         do_iounmap = 0; /* Don't sym_iounmap_device() after sym_attach(). */
1719         shost = sym_attach(&sym2_template, attach_count, &sym_dev);
1720         if (!shost)
1721                 goto free;
1722
1723         if (scsi_add_host(shost, &pdev->dev))
1724                 goto detach;
1725         scsi_scan_host(shost);
1726
1727         attach_count++;
1728
1729         return 0;
1730
1731  detach:
1732         sym_detach(pci_get_drvdata(pdev), pdev);
1733  free:
1734         if (do_iounmap)
1735                 sym_iounmap_device(&sym_dev);
1736         pci_release_regions(pdev);
1737  disable:
1738         if (do_disable_device)
1739                 pci_disable_device(pdev);
1740  leave:
1741         return -ENODEV;
1742 }
1743
1744 static void sym2_remove(struct pci_dev *pdev)
1745 {
1746         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1747
1748         scsi_remove_host(shost);
1749         sym_detach(shost, pdev);
1750         pci_release_regions(pdev);
1751         pci_disable_device(pdev);
1752
1753         attach_count--;
1754 }
1755
1756 /**
1757  * sym2_io_error_detected() - called when PCI error is detected
1758  * @pdev: pointer to PCI device
1759  * @state: current state of the PCI slot
1760  */
1761 static pci_ers_result_t sym2_io_error_detected(struct pci_dev *pdev,
1762                                          enum pci_channel_state state)
1763 {
1764         /* If slot is permanently frozen, turn everything off */
1765         if (state == pci_channel_io_perm_failure) {
1766                 sym2_remove(pdev);
1767                 return PCI_ERS_RESULT_DISCONNECT;
1768         }
1769
1770         disable_irq(pdev->irq);
1771         pci_disable_device(pdev);
1772
1773         /* Request that MMIO be enabled, so register dump can be taken. */
1774         return PCI_ERS_RESULT_CAN_RECOVER;
1775 }
1776
1777 /**
1778  * sym2_io_slot_dump - Enable MMIO and dump debug registers
1779  * @pdev: pointer to PCI device
1780  */
1781 static pci_ers_result_t sym2_io_slot_dump(struct pci_dev *pdev)
1782 {
1783         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1784
1785         sym_dump_registers(shost);
1786
1787         /* Request a slot reset. */
1788         return PCI_ERS_RESULT_NEED_RESET;
1789 }
1790
1791 /**
1792  * sym2_reset_workarounds - hardware-specific work-arounds
1793  *
1794  * This routine is similar to sym_set_workarounds(), except
1795  * that, at this point, we already know that the device was
1796  * successfully initialized at least once before, and so most
1797  * of the steps taken there are un-needed here.
1798  */
1799 static void sym2_reset_workarounds(struct pci_dev *pdev)
1800 {
1801         u_short status_reg;
1802         struct sym_chip *chip;
1803
1804         chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1805
1806         /* Work around for errant bit in 895A, in a fashion
1807          * similar to what is done in sym_set_workarounds().
1808          */
1809         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1810         if (!(chip->features & FE_66MHZ) && (status_reg & PCI_STATUS_66MHZ)) {
1811                 status_reg = PCI_STATUS_66MHZ;
1812                 pci_write_config_word(pdev, PCI_STATUS, status_reg);
1813                 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1814         }
1815 }
1816
1817 /**
1818  * sym2_io_slot_reset() - called when the pci bus has been reset.
1819  * @pdev: pointer to PCI device
1820  *
1821  * Restart the card from scratch.
1822  */
1823 static pci_ers_result_t sym2_io_slot_reset(struct pci_dev *pdev)
1824 {
1825         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1826         struct sym_hcb *np = sym_get_hcb(shost);
1827
1828         printk(KERN_INFO "%s: recovering from a PCI slot reset\n",
1829                   sym_name(np));
1830
1831         if (pci_enable_device(pdev)) {
1832                 printk(KERN_ERR "%s: Unable to enable after PCI reset\n",
1833                         sym_name(np));
1834                 return PCI_ERS_RESULT_DISCONNECT;
1835         }
1836
1837         pci_set_master(pdev);
1838         enable_irq(pdev->irq);
1839
1840         /* If the chip can do Memory Write Invalidate, enable it */
1841         if (np->features & FE_WRIE) {
1842                 if (pci_set_mwi(pdev))
1843                         return PCI_ERS_RESULT_DISCONNECT;
1844         }
1845
1846         /* Perform work-arounds, analogous to sym_set_workarounds() */
1847         sym2_reset_workarounds(pdev);
1848
1849         /* Perform host reset only on one instance of the card */
1850         if (PCI_FUNC(pdev->devfn) == 0) {
1851                 if (sym_reset_scsi_bus(np, 0)) {
1852                         printk(KERN_ERR "%s: Unable to reset scsi host\n",
1853                                 sym_name(np));
1854                         return PCI_ERS_RESULT_DISCONNECT;
1855                 }
1856                 sym_start_up(shost, 1);
1857         }
1858
1859         return PCI_ERS_RESULT_RECOVERED;
1860 }
1861
1862 /**
1863  * sym2_io_resume() - resume normal ops after PCI reset
1864  * @pdev: pointer to PCI device
1865  *
1866  * Called when the error recovery driver tells us that its
1867  * OK to resume normal operation. Use completion to allow
1868  * halted scsi ops to resume.
1869  */
1870 static void sym2_io_resume(struct pci_dev *pdev)
1871 {
1872         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1873         struct sym_data *sym_data = shost_priv(shost);
1874
1875         spin_lock_irq(shost->host_lock);
1876         if (sym_data->io_reset)
1877                 complete_all(sym_data->io_reset);
1878         spin_unlock_irq(shost->host_lock);
1879 }
1880
1881 static void sym2_get_signalling(struct Scsi_Host *shost)
1882 {
1883         struct sym_hcb *np = sym_get_hcb(shost);
1884         enum spi_signal_type type;
1885
1886         switch (np->scsi_mode) {
1887         case SMODE_SE:
1888                 type = SPI_SIGNAL_SE;
1889                 break;
1890         case SMODE_LVD:
1891                 type = SPI_SIGNAL_LVD;
1892                 break;
1893         case SMODE_HVD:
1894                 type = SPI_SIGNAL_HVD;
1895                 break;
1896         default:
1897                 type = SPI_SIGNAL_UNKNOWN;
1898                 break;
1899         }
1900         spi_signalling(shost) = type;
1901 }
1902
1903 static void sym2_set_offset(struct scsi_target *starget, int offset)
1904 {
1905         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1906         struct sym_hcb *np = sym_get_hcb(shost);
1907         struct sym_tcb *tp = &np->target[starget->id];
1908
1909         tp->tgoal.offset = offset;
1910         tp->tgoal.check_nego = 1;
1911 }
1912
1913 static void sym2_set_period(struct scsi_target *starget, int period)
1914 {
1915         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1916         struct sym_hcb *np = sym_get_hcb(shost);
1917         struct sym_tcb *tp = &np->target[starget->id];
1918
1919         /* have to have DT for these transfers, but DT will also
1920          * set width, so check that this is allowed */
1921         if (period <= np->minsync && spi_width(starget))
1922                 tp->tgoal.dt = 1;
1923
1924         tp->tgoal.period = period;
1925         tp->tgoal.check_nego = 1;
1926 }
1927
1928 static void sym2_set_width(struct scsi_target *starget, int width)
1929 {
1930         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1931         struct sym_hcb *np = sym_get_hcb(shost);
1932         struct sym_tcb *tp = &np->target[starget->id];
1933
1934         /* It is illegal to have DT set on narrow transfers.  If DT is
1935          * clear, we must also clear IU and QAS.  */
1936         if (width == 0)
1937                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1938
1939         tp->tgoal.width = width;
1940         tp->tgoal.check_nego = 1;
1941 }
1942
1943 static void sym2_set_dt(struct scsi_target *starget, int dt)
1944 {
1945         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1946         struct sym_hcb *np = sym_get_hcb(shost);
1947         struct sym_tcb *tp = &np->target[starget->id];
1948
1949         /* We must clear QAS and IU if DT is clear */
1950         if (dt)
1951                 tp->tgoal.dt = 1;
1952         else
1953                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1954         tp->tgoal.check_nego = 1;
1955 }
1956
1957 #if 0
1958 static void sym2_set_iu(struct scsi_target *starget, int iu)
1959 {
1960         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1961         struct sym_hcb *np = sym_get_hcb(shost);
1962         struct sym_tcb *tp = &np->target[starget->id];
1963
1964         if (iu)
1965                 tp->tgoal.iu = tp->tgoal.dt = 1;
1966         else
1967                 tp->tgoal.iu = 0;
1968         tp->tgoal.check_nego = 1;
1969 }
1970
1971 static void sym2_set_qas(struct scsi_target *starget, int qas)
1972 {
1973         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1974         struct sym_hcb *np = sym_get_hcb(shost);
1975         struct sym_tcb *tp = &np->target[starget->id];
1976
1977         if (qas)
1978                 tp->tgoal.dt = tp->tgoal.qas = 1;
1979         else
1980                 tp->tgoal.qas = 0;
1981         tp->tgoal.check_nego = 1;
1982 }
1983 #endif
1984
1985 static struct spi_function_template sym2_transport_functions = {
1986         .set_offset     = sym2_set_offset,
1987         .show_offset    = 1,
1988         .set_period     = sym2_set_period,
1989         .show_period    = 1,
1990         .set_width      = sym2_set_width,
1991         .show_width     = 1,
1992         .set_dt         = sym2_set_dt,
1993         .show_dt        = 1,
1994 #if 0
1995         .set_iu         = sym2_set_iu,
1996         .show_iu        = 1,
1997         .set_qas        = sym2_set_qas,
1998         .show_qas       = 1,
1999 #endif
2000         .get_signalling = sym2_get_signalling,
2001 };
2002
2003 static struct pci_device_id sym2_id_table[] = {
2004         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2005           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2006         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2007           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2008         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2009           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2010         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2011           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2012         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2013           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2014         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2015           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2016         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2017           PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL },
2018         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2019           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2020         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2021           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2022         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2023           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2024         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2025           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2026         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2027           PCI_ANY_ID, PCI_ANY_ID,  PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL }, /* new */
2028         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2029           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2030         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2031           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2032         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2033           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2034         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2035           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2036         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2037           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2038         { 0, }
2039 };
2040
2041 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2042
2043 static const struct pci_error_handlers sym2_err_handler = {
2044         .error_detected = sym2_io_error_detected,
2045         .mmio_enabled   = sym2_io_slot_dump,
2046         .slot_reset     = sym2_io_slot_reset,
2047         .resume         = sym2_io_resume,
2048 };
2049
2050 static struct pci_driver sym2_driver = {
2051         .name           = NAME53C8XX,
2052         .id_table       = sym2_id_table,
2053         .probe          = sym2_probe,
2054         .remove         = sym2_remove,
2055         .err_handler    = &sym2_err_handler,
2056 };
2057
2058 static int __init sym2_init(void)
2059 {
2060         int error;
2061
2062         sym2_setup_params();
2063         sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2064         if (!sym2_transport_template)
2065                 return -ENODEV;
2066
2067         error = pci_register_driver(&sym2_driver);
2068         if (error)
2069                 spi_release_transport(sym2_transport_template);
2070         return error;
2071 }
2072
2073 static void __exit sym2_exit(void)
2074 {
2075         pci_unregister_driver(&sym2_driver);
2076         spi_release_transport(sym2_transport_template);
2077 }
2078
2079 module_init(sym2_init);
2080 module_exit(sym2_exit);