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(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 /*
 540  *  Linux entry point of the interrupt handler.
 541  */
 542 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id)
 543 {
 544         struct Scsi_Host *shost = dev_id;
 545         struct sym_data *sym_data = shost_priv(shost);
 546         irqreturn_t result;
 547
 548         /* Avoid spinloop trying to handle interrupts on frozen device */
 549         if (pci_channel_offline(sym_data->pdev))
 550                 return IRQ_NONE;
 551
 552         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
 553
 554         spin_lock(shost->host_lock);
 555         result = sym_interrupt(shost);
 556         spin_unlock(shost->host_lock);
 557
 558         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
 559
 560         return result;
 561 }
 562
 563 /*
 564  *  Linux entry point of the timer handler
 565  */
 566 static void sym53c8xx_timer(unsigned long npref)
 567 {
 568         struct sym_hcb *np = (struct sym_hcb *)npref;
 569         unsigned long flags;
 570
 571         spin_lock_irqsave(np->s.host->host_lock, flags);
 572         sym_timer(np);
 573         spin_unlock_irqrestore(np->s.host->host_lock, flags);
 574 }
 575
 576
 577 /*
 578  *  What the eh thread wants us to perform.
 579  */
 580 #define SYM_EH_ABORT            0
 581 #define SYM_EH_DEVICE_RESET     1
 582 #define SYM_EH_BUS_RESET        2
 583 #define SYM_EH_HOST_RESET       3
 584
 585 /*
 586  *  Generic method for our eh processing.
 587  *  The 'op' argument tells what we have to do.
 588  */
 589 static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
 590 {
 591         struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
 592         struct Scsi_Host *shost = cmd->device->host;
 593         struct sym_data *sym_data = shost_priv(shost);
 594         struct pci_dev *pdev = sym_data->pdev;
 595         struct sym_hcb *np = sym_data->ncb;
 596         SYM_QUEHEAD *qp;
 597         int cmd_queued = 0;
 598         int sts = -1;
 599         struct completion eh_done;
 600
 601         scmd_printk(KERN_WARNING, cmd, "%s operation started\n", opname);
 602
 603         /* We may be in an error condition because the PCI bus
 604          * went down. In this case, we need to wait until the
 605          * PCI bus is reset, the card is reset, and only then
 606          * proceed with the scsi error recovery.  There's no
 607          * point in hurrying; take a leisurely wait.
 608          */
 609 #define WAIT_FOR_PCI_RECOVERY   35
 610         if (pci_channel_offline(pdev)) {
 611                 int finished_reset = 0;
 612                 init_completion(&eh_done);
 613                 spin_lock_irq(shost->host_lock);
 614                 /* Make sure we didn't race */
 615                 if (pci_channel_offline(pdev)) {
 616                         BUG_ON(sym_data->io_reset);
 617                         sym_data->io_reset = &eh_done;
 618                 } else {
 619                         finished_reset = 1;
 620                 }
 621                 spin_unlock_irq(shost->host_lock);
 622                 if (!finished_reset)
 623                         finished_reset = wait_for_completion_timeout
 624                                                 (sym_data->io_reset,
 625                                                 WAIT_FOR_PCI_RECOVERY*HZ);
 626                 spin_lock_irq(shost->host_lock);
 627                 sym_data->io_reset = NULL;
 628                 spin_unlock_irq(shost->host_lock);
 629                 if (!finished_reset)
 630                         return SCSI_FAILED;
 631         }
 632
 633         spin_lock_irq(shost->host_lock);
 634         /* This one is queued in some place -> to wait for completion */
 635         FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
 636                 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
 637                 if (cp->cmd == cmd) {
 638                         cmd_queued = 1;
 639                         break;
 640                 }
 641         }
 642
 643         /* Try to proceed the operation we have been asked for */
 644         sts = -1;
 645         switch(op) {
 646         case SYM_EH_ABORT:
 647                 sts = sym_abort_scsiio(np, cmd, 1);
 648                 break;
 649         case SYM_EH_DEVICE_RESET:
 650                 sts = sym_reset_scsi_target(np, cmd->device->id);
 651                 break;
 652         case SYM_EH_BUS_RESET:
 653                 sym_reset_scsi_bus(np, 1);
 654                 sts = 0;
 655                 break;
 656         case SYM_EH_HOST_RESET:
 657                 sym_reset_scsi_bus(np, 0);
 658                 sym_start_up(shost, 1);
 659                 sts = 0;
 660                 break;
 661         default:
 662                 break;
 663         }
 664
 665         /* On error, restore everything and cross fingers :) */
 666         if (sts)
 667                 cmd_queued = 0;
 668
 669         if (cmd_queued) {
 670                 init_completion(&eh_done);
 671                 ucmd->eh_done = &eh_done;
 672                 spin_unlock_irq(shost->host_lock);
 673                 if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
 674                         ucmd->eh_done = NULL;
 675                         sts = -2;
 676                 }
 677         } else {
 678                 spin_unlock_irq(shost->host_lock);
 679         }
 680
 681         dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
 682                         sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
 683         return sts ? SCSI_FAILED : SCSI_SUCCESS;
 684 }
 685
 686
 687 /*
 688  * Error handlers called from the eh thread (one thread per HBA).
 689  */
 690 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
 691 {
 692         return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
 693 }
 694
 695 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
 696 {
 697         return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
 698 }
 699
 700 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
 701 {
 702         return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
 703 }
 704
 705 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
 706 {
 707         return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
 708 }
 709
 710 /*
 711  *  Tune device queuing depth, according to various limits.
 712  */
 713 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
 714 {
 715         struct sym_lcb *lp = sym_lp(tp, lun);
 716         u_short oldtags;
 717
 718         if (!lp)
 719                 return;
 720
 721         oldtags = lp->s.reqtags;
 722
 723         if (reqtags > lp->s.scdev_depth)
 724                 reqtags = lp->s.scdev_depth;
 725
 726         lp->s.reqtags     = reqtags;
 727
 728         if (reqtags != oldtags) {
 729                 dev_info(&tp->starget->dev,
 730                          "tagged command queuing %s, command queue depth %d.\n",
 731                           lp->s.reqtags ? "enabled" : "disabled", reqtags);
 732         }
 733 }
 734
 735 static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
 736 {
 737         struct sym_hcb *np = sym_get_hcb(sdev->host);
 738         struct sym_tcb *tp = &np->target[sdev->id];
 739         struct sym_lcb *lp;
 740
 741         if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
 742                 return -ENXIO;
 743
 744         tp->starget = sdev->sdev_target;
 745         /*
 746          * Fail the device init if the device is flagged NOSCAN at BOOT in
 747          * the NVRAM.  This may speed up boot and maintain coherency with
 748          * BIOS device numbering.  Clearing the flag allows the user to
 749          * rescan skipped devices later.  We also return an error for
 750          * devices not flagged for SCAN LUNS in the NVRAM since some single
 751          * lun devices behave badly when asked for a non zero LUN.
 752          */
 753
 754         if (tp->usrflags & SYM_SCAN_BOOT_DISABLED) {
 755                 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
 756                 starget_printk(KERN_INFO, tp->starget,
 757                                 "Scan at boot disabled in NVRAM\n");
 758                 return -ENXIO;
 759         }
 760
 761         if (tp->usrflags & SYM_SCAN_LUNS_DISABLED) {
 762                 if (sdev->lun != 0)
 763                         return -ENXIO;
 764                 starget_printk(KERN_INFO, tp->starget,
 765                                 "Multiple LUNs disabled in NVRAM\n");
 766         }
 767
 768         lp = sym_alloc_lcb(np, sdev->id, sdev->lun);
 769         if (!lp)
 770                 return -ENOMEM;
 771
 772         spi_min_period(tp->starget) = tp->usr_period;
 773         spi_max_width(tp->starget) = tp->usr_width;
 774
 775         return 0;
 776 }
 777
 778 /*
 779  * Linux entry point for device queue sizing.
 780  */
 781 static int sym53c8xx_slave_configure(struct scsi_device *sdev)
 782 {
 783         struct sym_hcb *np = sym_get_hcb(sdev->host);
 784         struct sym_tcb *tp = &np->target[sdev->id];
 785         struct sym_lcb *lp = sym_lp(tp, sdev->lun);
 786         int reqtags, depth_to_use;
 787
 788         /*
 789          *  Get user flags.
 790          */
 791         lp->curr_flags = lp->user_flags;
 792
 793         /*
 794          *  Select queue depth from driver setup.
 795          *  Do not use more than configured by user.
 796          *  Use at least 1.
 797          *  Do not use more than our maximum.
 798          */
 799         reqtags = sym_driver_setup.max_tag;
 800         if (reqtags > tp->usrtags)
 801                 reqtags = tp->usrtags;
 802         if (!sdev->tagged_supported)
 803                 reqtags = 0;
 804         if (reqtags > SYM_CONF_MAX_TAG)
 805                 reqtags = SYM_CONF_MAX_TAG;
 806         depth_to_use = reqtags ? reqtags : 1;
 807         scsi_adjust_queue_depth(sdev,
 808                                 sdev->tagged_supported ? MSG_SIMPLE_TAG : 0,
 809                                 depth_to_use);
 810         lp->s.scdev_depth = depth_to_use;
 811         sym_tune_dev_queuing(tp, sdev->lun, reqtags);
 812
 813         if (!spi_initial_dv(sdev->sdev_target))
 814                 spi_dv_device(sdev);
 815
 816         return 0;
 817 }
 818
 819 static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
 820 {
 821         struct sym_hcb *np = sym_get_hcb(sdev->host);
 822         struct sym_lcb *lp = sym_lp(&np->target[sdev->id], sdev->lun);
 823
 824         if (lp->itlq_tbl)
 825                 sym_mfree_dma(lp->itlq_tbl, SYM_CONF_MAX_TASK * 4, "ITLQ_TBL");
 826         kfree(lp->cb_tags);
 827         sym_mfree_dma(lp, sizeof(*lp), "LCB");
 828 }
 829
 830 /*
 831  *  Linux entry point for info() function
 832  */
 833 static const char *sym53c8xx_info (struct Scsi_Host *host)
 834 {
 835         return SYM_DRIVER_NAME;
 836 }
 837
 838
 839 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
 840 /*
 841  *  Proc file system stuff
 842  *
 843  *  A read operation returns adapter information.
 844  *  A write operation is a control command.
 845  *  The string is parsed in the driver code and the command is passed
 846  *  to the sym_usercmd() function.
 847  */
 848
 849 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
 850
 851 struct  sym_usrcmd {
 852         u_long  target;
 853         u_long  lun;
 854         u_long  data;
 855         u_long  cmd;
 856 };
 857
 858 #define UC_SETSYNC      10
 859 #define UC_SETTAGS      11
 860 #define UC_SETDEBUG     12
 861 #define UC_SETWIDE      14
 862 #define UC_SETFLAG      15
 863 #define UC_SETVERBOSE   17
 864 #define UC_RESETDEV     18
 865 #define UC_CLEARDEV     19
 866
 867 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
 868 {
 869         struct sym_tcb *tp;
 870         int t, l;
 871
 872         switch (uc->cmd) {
 873         case 0: return;
 874
 875 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
 876         case UC_SETDEBUG:
 877                 sym_debug_flags = uc->data;
 878                 break;
 879 #endif
 880         case UC_SETVERBOSE:
 881                 np->verbose = uc->data;
 882                 break;
 883         default:
 884                 /*
 885                  * We assume that other commands apply to targets.
 886                  * This should always be the case and avoid the below
 887                  * 4 lines to be repeated 6 times.
 888                  */
 889                 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
 890                         if (!((uc->target >> t) & 1))
 891                                 continue;
 892                         tp = &np->target[t];
 893
 894                         switch (uc->cmd) {
 895
 896                         case UC_SETSYNC:
 897                                 if (!uc->data || uc->data >= 255) {
 898                                         tp->tgoal.iu = tp->tgoal.dt =
 899                                                 tp->tgoal.qas = 0;
 900                                         tp->tgoal.offset = 0;
 901                                 } else if (uc->data <= 9 && np->minsync_dt) {
 902                                         if (uc->data < np->minsync_dt)
 903                                                 uc->data = np->minsync_dt;
 904                                         tp->tgoal.iu = tp->tgoal.dt =
 905                                                 tp->tgoal.qas = 1;
 906                                         tp->tgoal.width = 1;
 907                                         tp->tgoal.period = uc->data;
 908                                         tp->tgoal.offset = np->maxoffs_dt;
 909                                 } else {
 910                                         if (uc->data < np->minsync)
 911                                                 uc->data = np->minsync;
 912                                         tp->tgoal.iu = tp->tgoal.dt =
 913                                                 tp->tgoal.qas = 0;
 914                                         tp->tgoal.period = uc->data;
 915                                         tp->tgoal.offset = np->maxoffs;
 916                                 }
 917                                 tp->tgoal.check_nego = 1;
 918                                 break;
 919                         case UC_SETWIDE:
 920                                 tp->tgoal.width = uc->data ? 1 : 0;
 921                                 tp->tgoal.check_nego = 1;
 922                                 break;
 923                         case UC_SETTAGS:
 924                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
 925                                         sym_tune_dev_queuing(tp, l, uc->data);
 926                                 break;
 927                         case UC_RESETDEV:
 928                                 tp->to_reset = 1;
 929                                 np->istat_sem = SEM;
 930                                 OUTB(np, nc_istat, SIGP|SEM);
 931                                 break;
 932                         case UC_CLEARDEV:
 933                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
 934                                         struct sym_lcb *lp = sym_lp(tp, l);
 935                                         if (lp) lp->to_clear = 1;
 936                                 }
 937                                 np->istat_sem = SEM;
 938                                 OUTB(np, nc_istat, SIGP|SEM);
 939                                 break;
 940                         case UC_SETFLAG:
 941                                 tp->usrflags = uc->data;
 942                                 break;
 943                         }
 944                 }
 945                 break;
 946         }
 947 }
 948
 949 static int skip_spaces(char *ptr, int len)
 950 {
 951         int cnt, c;
 952
 953         for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
 954
 955         return (len - cnt);
 956 }
 957
 958 static int get_int_arg(char *ptr, int len, u_long *pv)
 959 {
 960         char *end;
 961
 962         *pv = simple_strtoul(ptr, &end, 10);
 963         return (end - ptr);
 964 }
 965
 966 static int is_keyword(char *ptr, int len, char *verb)
 967 {
 968         int verb_len = strlen(verb);
 969
 970         if (len >= verb_len && !memcmp(verb, ptr, verb_len))
 971                 return verb_len;
 972         else
 973                 return 0;
 974 }
 975
 976 #define SKIP_SPACES(ptr, len)                                           \
 977         if ((arg_len = skip_spaces(ptr, len)) < 1)                      \
 978                 return -EINVAL;                                         \
 979         ptr += arg_len; len -= arg_len;
 980
 981 #define GET_INT_ARG(ptr, len, v)                                        \
 982         if (!(arg_len = get_int_arg(ptr, len, &(v))))                   \
 983                 return -EINVAL;                                         \
 984         ptr += arg_len; len -= arg_len;
 985
 986
 987 /*
 988  * Parse a control command
 989  */
 990
 991 static int sym_user_command(struct Scsi_Host *shost, char *buffer, int length)
 992 {
 993         struct sym_hcb *np = sym_get_hcb(shost);
 994         char *ptr       = buffer;
 995         int len         = length;
 996         struct sym_usrcmd cmd, *uc = &cmd;
 997         int             arg_len;
 998         u_long          target;
 999
1000         memset(uc, 0, sizeof(*uc));
1001
1002         if (len > 0 && ptr[len-1] == '\n')
1003                 --len;
1004
1005         if      ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1006                 uc->cmd = UC_SETSYNC;
1007         else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1008                 uc->cmd = UC_SETTAGS;
1009         else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1010                 uc->cmd = UC_SETVERBOSE;
1011         else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1012                 uc->cmd = UC_SETWIDE;
1013 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1014         else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1015                 uc->cmd = UC_SETDEBUG;
1016 #endif
1017         else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1018                 uc->cmd = UC_SETFLAG;
1019         else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1020                 uc->cmd = UC_RESETDEV;
1021         else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1022                 uc->cmd = UC_CLEARDEV;
1023         else
1024                 arg_len = 0;
1025
1026 #ifdef DEBUG_PROC_INFO
1027 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1028 #endif
1029
1030         if (!arg_len)
1031                 return -EINVAL;
1032         ptr += arg_len; len -= arg_len;
1033
1034         switch(uc->cmd) {
1035         case UC_SETSYNC:
1036         case UC_SETTAGS:
1037         case UC_SETWIDE:
1038         case UC_SETFLAG:
1039         case UC_RESETDEV:
1040         case UC_CLEARDEV:
1041                 SKIP_SPACES(ptr, len);
1042                 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1043                         ptr += arg_len; len -= arg_len;
1044                         uc->target = ~0;
1045                 } else {
1046                         GET_INT_ARG(ptr, len, target);
1047                         uc->target = (1<<target);
1048 #ifdef DEBUG_PROC_INFO
1049 printk("sym_user_command: target=%ld\n", target);
1050 #endif
1051                 }
1052                 break;
1053         }
1054
1055         switch(uc->cmd) {
1056         case UC_SETVERBOSE:
1057         case UC_SETSYNC:
1058         case UC_SETTAGS:
1059         case UC_SETWIDE:
1060                 SKIP_SPACES(ptr, len);
1061                 GET_INT_ARG(ptr, len, uc->data);
1062 #ifdef DEBUG_PROC_INFO
1063 printk("sym_user_command: data=%ld\n", uc->data);
1064 #endif
1065                 break;
1066 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1067         case UC_SETDEBUG:
1068                 while (len > 0) {
1069                         SKIP_SPACES(ptr, len);
1070                         if      ((arg_len = is_keyword(ptr, len, "alloc")))
1071                                 uc->data |= DEBUG_ALLOC;
1072                         else if ((arg_len = is_keyword(ptr, len, "phase")))
1073                                 uc->data |= DEBUG_PHASE;
1074                         else if ((arg_len = is_keyword(ptr, len, "queue")))
1075                                 uc->data |= DEBUG_QUEUE;
1076                         else if ((arg_len = is_keyword(ptr, len, "result")))
1077                                 uc->data |= DEBUG_RESULT;
1078                         else if ((arg_len = is_keyword(ptr, len, "scatter")))
1079                                 uc->data |= DEBUG_SCATTER;
1080                         else if ((arg_len = is_keyword(ptr, len, "script")))
1081                                 uc->data |= DEBUG_SCRIPT;
1082                         else if ((arg_len = is_keyword(ptr, len, "tiny")))
1083                                 uc->data |= DEBUG_TINY;
1084                         else if ((arg_len = is_keyword(ptr, len, "timing")))
1085                                 uc->data |= DEBUG_TIMING;
1086                         else if ((arg_len = is_keyword(ptr, len, "nego")))
1087                                 uc->data |= DEBUG_NEGO;
1088                         else if ((arg_len = is_keyword(ptr, len, "tags")))
1089                                 uc->data |= DEBUG_TAGS;
1090                         else if ((arg_len = is_keyword(ptr, len, "pointer")))
1091                                 uc->data |= DEBUG_POINTER;
1092                         else
1093                                 return -EINVAL;
1094                         ptr += arg_len; len -= arg_len;
1095                 }
1096 #ifdef DEBUG_PROC_INFO
1097 printk("sym_user_command: data=%ld\n", uc->data);
1098 #endif
1099                 break;
1100 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1101         case UC_SETFLAG:
1102                 while (len > 0) {
1103                         SKIP_SPACES(ptr, len);
1104                         if      ((arg_len = is_keyword(ptr, len, "no_disc")))
1105                                 uc->data &= ~SYM_DISC_ENABLED;
1106                         else
1107                                 return -EINVAL;
1108                         ptr += arg_len; len -= arg_len;
1109                 }
1110                 break;
1111         default:
1112                 break;
1113         }
1114
1115         if (len)
1116                 return -EINVAL;
1117         else {
1118                 unsigned long flags;
1119
1120                 spin_lock_irqsave(shost->host_lock, flags);
1121                 sym_exec_user_command(np, uc);
1122                 spin_unlock_irqrestore(shost->host_lock, flags);
1123         }
1124         return length;
1125 }
1126
1127 #endif  /* SYM_LINUX_USER_COMMAND_SUPPORT */
1128
1129
1130 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1131 /*
1132  *  Informations through the proc file system.
1133  */
1134 struct info_str {
1135         char *buffer;
1136         int length;
1137         int offset;
1138         int pos;
1139 };
1140
1141 static void copy_mem_info(struct info_str *info, char *data, int len)
1142 {
1143         if (info->pos + len > info->length)
1144                 len = info->length - info->pos;
1145
1146         if (info->pos + len < info->offset) {
1147                 info->pos += len;
1148                 return;
1149         }
1150         if (info->pos < info->offset) {
1151                 data += (info->offset - info->pos);
1152                 len  -= (info->offset - info->pos);
1153         }
1154
1155         if (len > 0) {
1156                 memcpy(info->buffer + info->pos, data, len);
1157                 info->pos += len;
1158         }
1159 }
1160
1161 static int copy_info(struct info_str *info, char *fmt, ...)
1162 {
1163         va_list args;
1164         char buf[81];
1165         int len;
1166
1167         va_start(args, fmt);
1168         len = vsprintf(buf, fmt, args);
1169         va_end(args);
1170
1171         copy_mem_info(info, buf, len);
1172         return len;
1173 }
1174
1175 /*
1176  *  Copy formatted information into the input buffer.
1177  */
1178 static int sym_host_info(struct Scsi_Host *shost, char *ptr, off_t offset, int len)
1179 {
1180         struct sym_data *sym_data = shost_priv(shost);
1181         struct pci_dev *pdev = sym_data->pdev;
1182         struct sym_hcb *np = sym_data->ncb;
1183         struct info_str info;
1184
1185         info.buffer     = ptr;
1186         info.length     = len;
1187         info.offset     = offset;
1188         info.pos        = 0;
1189
1190         copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1191                          "revision id 0x%x\n", np->s.chip_name,
1192                          pdev->device, pdev->revision);
1193         copy_info(&info, "At PCI address %s, IRQ %u\n",
1194                          pci_name(pdev), pdev->irq);
1195         copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1196                          (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1197                          np->maxwide ? "Wide" : "Narrow",
1198                          np->minsync_dt ? ", DT capable" : "");
1199
1200         copy_info(&info, "Max. started commands %d, "
1201                          "max. commands per LUN %d\n",
1202                          SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1203
1204         return info.pos > info.offset? info.pos - info.offset : 0;
1205 }
1206 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1207
1208 /*
1209  *  Entry point of the scsi proc fs of the driver.
1210  *  - func = 0 means read  (returns adapter infos)
1211  *  - func = 1 means write (not yet merget from sym53c8xx)
1212  */
1213 static int sym53c8xx_proc_info(struct Scsi_Host *shost, char *buffer,
1214                         char **start, off_t offset, int length, int func)
1215 {
1216         int retv;
1217
1218         if (func) {
1219 #ifdef  SYM_LINUX_USER_COMMAND_SUPPORT
1220                 retv = sym_user_command(shost, buffer, length);
1221 #else
1222                 retv = -EINVAL;
1223 #endif
1224         } else {
1225                 if (start)
1226                         *start = buffer;
1227 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1228                 retv = sym_host_info(shost, buffer, offset, length);
1229 #else
1230                 retv = -EINVAL;
1231 #endif
1232         }
1233
1234         return retv;
1235 }
1236 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1237
1238 /*
1239  * Free resources claimed by sym_iomap_device().  Note that
1240  * sym_free_resources() should be used instead of this function after calling
1241  * sym_attach().
1242  */
1243 static void __devinit
1244 sym_iounmap_device(struct sym_device *device)
1245 {
1246         if (device->s.ioaddr)
1247                 pci_iounmap(device->pdev, device->s.ioaddr);
1248         if (device->s.ramaddr)
1249                 pci_iounmap(device->pdev, device->s.ramaddr);
1250 }
1251
1252 /*
1253  *      Free controller resources.
1254  */
1255 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev,
1256                 int do_free_irq)
1257 {
1258         /*
1259          *  Free O/S specific resources.
1260          */
1261         if (do_free_irq)
1262                 free_irq(pdev->irq, np->s.host);
1263         if (np->s.ioaddr)
1264                 pci_iounmap(pdev, np->s.ioaddr);
1265         if (np->s.ramaddr)
1266                 pci_iounmap(pdev, np->s.ramaddr);
1267         /*
1268          *  Free O/S independent resources.
1269          */
1270         sym_hcb_free(np);
1271
1272         sym_mfree_dma(np, sizeof(*np), "HCB");
1273 }
1274
1275 /*
1276  *  Host attach and initialisations.
1277  *
1278  *  Allocate host data and ncb structure.
1279  *  Remap MMIO region.
1280  *  Do chip initialization.
1281  *  If all is OK, install interrupt handling and
1282  *  start the timer daemon.
1283  */
1284 static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1285                 int unit, struct sym_device *dev)
1286 {
1287         struct sym_data *sym_data;
1288         struct sym_hcb *np = NULL;
1289         struct Scsi_Host *shost = NULL;
1290         struct pci_dev *pdev = dev->pdev;
1291         unsigned long flags;
1292         struct sym_fw *fw;
1293         int do_free_irq = 0;
1294
1295         printk(KERN_INFO "sym%d: <%s> rev 0x%x at pci %s irq %u\n",
1296                 unit, dev->chip.name, pdev->revision, pci_name(pdev),
1297                 pdev->irq);
1298
1299         /*
1300          *  Get the firmware for this chip.
1301          */
1302         fw = sym_find_firmware(&dev->chip);
1303         if (!fw)
1304                 goto attach_failed;
1305
1306         shost = scsi_host_alloc(tpnt, sizeof(*sym_data));
1307         if (!shost)
1308                 goto attach_failed;
1309         sym_data = shost_priv(shost);
1310
1311         /*
1312          *  Allocate immediately the host control block,
1313          *  since we are only expecting to succeed. :)
1314          *  We keep track in the HCB of all the resources that
1315          *  are to be released on error.
1316          */
1317         np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1318         if (!np)
1319                 goto attach_failed;
1320         np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1321         sym_data->ncb = np;
1322         sym_data->pdev = pdev;
1323         np->s.host = shost;
1324
1325         pci_set_drvdata(pdev, shost);
1326
1327         /*
1328          *  Copy some useful infos to the HCB.
1329          */
1330         np->hcb_ba      = vtobus(np);
1331         np->verbose     = sym_driver_setup.verbose;
1332         np->s.unit      = unit;
1333         np->features    = dev->chip.features;
1334         np->clock_divn  = dev->chip.nr_divisor;
1335         np->maxoffs     = dev->chip.offset_max;
1336         np->maxburst    = dev->chip.burst_max;
1337         np->myaddr      = dev->host_id;
1338         np->mmio_ba     = (u32)dev->mmio_base;
1339         np->ram_ba      = (u32)dev->ram_base;
1340         np->s.ioaddr    = dev->s.ioaddr;
1341         np->s.ramaddr   = dev->s.ramaddr;
1342
1343         /*
1344          *  Edit its name.
1345          */
1346         strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1347         sprintf(np->s.inst_name, "sym%d", np->s.unit);
1348
1349         if ((SYM_CONF_DMA_ADDRESSING_MODE > 0) && (np->features & FE_DAC) &&
1350                         !pci_set_dma_mask(pdev, DMA_DAC_MASK)) {
1351                 set_dac(np);
1352         } else if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
1353                 printf_warning("%s: No suitable DMA available\n", sym_name(np));
1354                 goto attach_failed;
1355         }
1356
1357         if (sym_hcb_attach(shost, fw, dev->nvram))
1358                 goto attach_failed;
1359
1360         /*
1361          *  Install the interrupt handler.
1362          *  If we synchonize the C code with SCRIPTS on interrupt,
1363          *  we do not want to share the INTR line at all.
1364          */
1365         if (request_irq(pdev->irq, sym53c8xx_intr, IRQF_SHARED, NAME53C8XX,
1366                         shost)) {
1367                 printf_err("%s: request irq %u failure\n",
1368                         sym_name(np), pdev->irq);
1369                 goto attach_failed;
1370         }
1371         do_free_irq = 1;
1372
1373         /*
1374          *  After SCSI devices have been opened, we cannot
1375          *  reset the bus safely, so we do it here.
1376          */
1377         spin_lock_irqsave(shost->host_lock, flags);
1378         if (sym_reset_scsi_bus(np, 0))
1379                 goto reset_failed;
1380
1381         /*
1382          *  Start the SCRIPTS.
1383          */
1384         sym_start_up(shost, 1);
1385
1386         /*
1387          *  Start the timer daemon
1388          */
1389         init_timer(&np->s.timer);
1390         np->s.timer.data     = (unsigned long) np;
1391         np->s.timer.function = sym53c8xx_timer;
1392         np->s.lasttime=0;
1393         sym_timer (np);
1394
1395         /*
1396          *  Fill Linux host instance structure
1397          *  and return success.
1398          */
1399         shost->max_channel      = 0;
1400         shost->this_id          = np->myaddr;
1401         shost->max_id           = np->maxwide ? 16 : 8;
1402         shost->max_lun          = SYM_CONF_MAX_LUN;
1403         shost->unique_id        = pci_resource_start(pdev, 0);
1404         shost->cmd_per_lun      = SYM_CONF_MAX_TAG;
1405         shost->can_queue        = (SYM_CONF_MAX_START-2);
1406         shost->sg_tablesize     = SYM_CONF_MAX_SG;
1407         shost->max_cmd_len      = 16;
1408         BUG_ON(sym2_transport_template == NULL);
1409         shost->transportt       = sym2_transport_template;
1410
1411         /* 53c896 rev 1 errata: DMA may not cross 16MB boundary */
1412         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 2)
1413                 shost->dma_boundary = 0xFFFFFF;
1414
1415         spin_unlock_irqrestore(shost->host_lock, flags);
1416
1417         return shost;
1418
1419  reset_failed:
1420         printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1421                    "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1422         spin_unlock_irqrestore(shost->host_lock, flags);
1423  attach_failed:
1424         printf_info("sym%d: giving up ...\n", unit);
1425         if (np)
1426                 sym_free_resources(np, pdev, do_free_irq);
1427         else
1428                 sym_iounmap_device(dev);
1429         if (shost)
1430                 scsi_host_put(shost);
1431
1432         return NULL;
1433  }
1434
1435
1436 /*
1437  *    Detect and try to read SYMBIOS and TEKRAM NVRAM.
1438  */
1439 #if SYM_CONF_NVRAM_SUPPORT
1440 static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1441 {
1442         devp->nvram = nvp;
1443         nvp->type = 0;
1444
1445         sym_read_nvram(devp, nvp);
1446 }
1447 #else
1448 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1449 {
1450 }
1451 #endif  /* SYM_CONF_NVRAM_SUPPORT */
1452
1453 static int __devinit sym_check_supported(struct sym_device *device)
1454 {
1455         struct sym_chip *chip;
1456         struct pci_dev *pdev = device->pdev;
1457         unsigned long io_port = pci_resource_start(pdev, 0);
1458         int i;
1459
1460         /*
1461          *  If user excluded this chip, do not initialize it.
1462          *  I hate this code so much.  Must kill it.
1463          */
1464         if (io_port) {
1465                 for (i = 0 ; i < 8 ; i++) {
1466                         if (sym_driver_setup.excludes[i] == io_port)
1467                                 return -ENODEV;
1468                 }
1469         }
1470
1471         /*
1472          * Check if the chip is supported.  Then copy the chip description
1473          * to our device structure so we can make it match the actual device
1474          * and options.
1475          */
1476         chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1477         if (!chip) {
1478                 dev_info(&pdev->dev, "device not supported\n");
1479                 return -ENODEV;
1480         }
1481         memcpy(&device->chip, chip, sizeof(device->chip));
1482
1483         return 0;
1484 }
1485
1486 /*
1487  * Ignore Symbios chips controlled by various RAID controllers.
1488  * These controllers set value 0x52414944 at RAM end - 16.
1489  */
1490 static int __devinit sym_check_raid(struct sym_device *device)
1491 {
1492         unsigned int ram_size, ram_val;
1493
1494         if (!device->s.ramaddr)
1495                 return 0;
1496
1497         if (device->chip.features & FE_RAM8K)
1498                 ram_size = 8192;
1499         else
1500                 ram_size = 4096;
1501
1502         ram_val = readl(device->s.ramaddr + ram_size - 16);
1503         if (ram_val != 0x52414944)
1504                 return 0;
1505
1506         dev_info(&device->pdev->dev,
1507                         "not initializing, driven by RAID controller.\n");
1508         return -ENODEV;
1509 }
1510
1511 static int __devinit sym_set_workarounds(struct sym_device *device)
1512 {
1513         struct sym_chip *chip = &device->chip;
1514         struct pci_dev *pdev = device->pdev;
1515         u_short status_reg;
1516
1517         /*
1518          *  (ITEM 12 of a DEL about the 896 I haven't yet).
1519          *  We must ensure the chip will use WRITE AND INVALIDATE.
1520          *  The revision number limit is for now arbitrary.
1521          */
1522         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 0x4) {
1523                 chip->features  |= (FE_WRIE | FE_CLSE);
1524         }
1525
1526         /* If the chip can do Memory Write Invalidate, enable it */
1527         if (chip->features & FE_WRIE) {
1528                 if (pci_set_mwi(pdev))
1529                         return -ENODEV;
1530         }
1531
1532         /*
1533          *  Work around for errant bit in 895A. The 66Mhz
1534          *  capable bit is set erroneously. Clear this bit.
1535          *  (Item 1 DEL 533)
1536          *
1537          *  Make sure Config space and Features agree.
1538          *
1539          *  Recall: writes are not normal to status register -
1540          *  write a 1 to clear and a 0 to leave unchanged.
1541          *  Can only reset bits.
1542          */
1543         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1544         if (chip->features & FE_66MHZ) {
1545                 if (!(status_reg & PCI_STATUS_66MHZ))
1546                         chip->features &= ~FE_66MHZ;
1547         } else {
1548                 if (status_reg & PCI_STATUS_66MHZ) {
1549                         status_reg = PCI_STATUS_66MHZ;
1550                         pci_write_config_word(pdev, PCI_STATUS, status_reg);
1551                         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1552                 }
1553         }
1554
1555         return 0;
1556 }
1557
1558 /*
1559  * Map HBA registers and on-chip SRAM (if present).
1560  */
1561 static int __devinit
1562 sym_iomap_device(struct sym_device *device)
1563 {
1564         struct pci_dev *pdev = device->pdev;
1565         struct pci_bus_region bus_addr;
1566         int i = 2;
1567
1568         pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[1]);
1569         device->mmio_base = bus_addr.start;
1570
1571         if (device->chip.features & FE_RAM) {
1572                 /*
1573                  * If the BAR is 64-bit, resource 2 will be occupied by the
1574                  * upper 32 bits
1575                  */
1576                 if (!pdev->resource[i].flags)
1577                         i++;
1578                 pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[i]);
1579                 device->ram_base = bus_addr.start;
1580         }
1581
1582 #ifdef CONFIG_SCSI_SYM53C8XX_MMIO
1583         if (device->mmio_base)
1584                 device->s.ioaddr = pci_iomap(pdev, 1,
1585                                                 pci_resource_len(pdev, 1));
1586 #endif
1587         if (!device->s.ioaddr)
1588                 device->s.ioaddr = pci_iomap(pdev, 0,
1589                                                 pci_resource_len(pdev, 0));
1590         if (!device->s.ioaddr) {
1591                 dev_err(&pdev->dev, "could not map registers; giving up.\n");
1592                 return -EIO;
1593         }
1594         if (device->ram_base) {
1595                 device->s.ramaddr = pci_iomap(pdev, i,
1596                                                 pci_resource_len(pdev, i));
1597                 if (!device->s.ramaddr) {
1598                         dev_warn(&pdev->dev,
1599                                 "could not map SRAM; continuing anyway.\n");
1600                         device->ram_base = 0;
1601                 }
1602         }
1603
1604         return 0;
1605 }
1606
1607 /*
1608  * The NCR PQS and PDS cards are constructed as a DEC bridge
1609  * behind which sits a proprietary NCR memory controller and
1610  * either four or two 53c875s as separate devices.  We can tell
1611  * if an 875 is part of a PQS/PDS or not since if it is, it will
1612  * be on the same bus as the memory controller.  In its usual
1613  * mode of operation, the 875s are slaved to the memory
1614  * controller for all transfers.  To operate with the Linux
1615  * driver, the memory controller is disabled and the 875s
1616  * freed to function independently.  The only wrinkle is that
1617  * the preset SCSI ID (which may be zero) must be read in from
1618  * a special configuration space register of the 875.
1619  */
1620 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1621 {
1622         int slot;
1623         u8 tmp;
1624
1625         for (slot = 0; slot < 256; slot++) {
1626                 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1627
1628                 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1629                         pci_dev_put(memc);
1630                         continue;
1631                 }
1632
1633                 /* bit 1: allow individual 875 configuration */
1634                 pci_read_config_byte(memc, 0x44, &tmp);
1635                 if ((tmp & 0x2) == 0) {
1636                         tmp |= 0x2;
1637                         pci_write_config_byte(memc, 0x44, tmp);
1638                 }
1639
1640                 /* bit 2: drive individual 875 interrupts to the bus */
1641                 pci_read_config_byte(memc, 0x45, &tmp);
1642                 if ((tmp & 0x4) == 0) {
1643                         tmp |= 0x4;
1644                         pci_write_config_byte(memc, 0x45, tmp);
1645                 }
1646
1647                 pci_dev_put(memc);
1648                 break;
1649         }
1650
1651         pci_read_config_byte(pdev, 0x84, &tmp);
1652         sym_dev->host_id = tmp;
1653 }
1654
1655 /*
1656  *  Called before unloading the module.
1657  *  Detach the host.
1658  *  We have to free resources and halt the NCR chip.
1659  */
1660 static int sym_detach(struct Scsi_Host *shost, struct pci_dev *pdev)
1661 {
1662         struct sym_hcb *np = sym_get_hcb(shost);
1663         printk("%s: detaching ...\n", sym_name(np));
1664
1665         del_timer_sync(&np->s.timer);
1666
1667         /*
1668          * Reset NCR chip.
1669          * We should use sym_soft_reset(), but we don't want to do
1670          * so, since we may not be safe if interrupts occur.
1671          */
1672         printk("%s: resetting chip\n", sym_name(np));
1673         OUTB(np, nc_istat, SRST);
1674         INB(np, nc_mbox1);
1675         udelay(10);
1676         OUTB(np, nc_istat, 0);
1677
1678         sym_free_resources(np, pdev, 1);
1679         scsi_host_put(shost);
1680
1681         return 1;
1682 }
1683
1684 /*
1685  * Driver host template.
1686  */
1687 static struct scsi_host_template sym2_template = {
1688         .module                 = THIS_MODULE,
1689         .name                   = "sym53c8xx",
1690         .info                   = sym53c8xx_info,
1691         .queuecommand           = sym53c8xx_queue_command,
1692         .slave_alloc            = sym53c8xx_slave_alloc,
1693         .slave_configure        = sym53c8xx_slave_configure,
1694         .slave_destroy          = sym53c8xx_slave_destroy,
1695         .eh_abort_handler       = sym53c8xx_eh_abort_handler,
1696         .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1697         .eh_bus_reset_handler   = sym53c8xx_eh_bus_reset_handler,
1698         .eh_host_reset_handler  = sym53c8xx_eh_host_reset_handler,
1699         .this_id                = 7,
1700         .use_clustering         = ENABLE_CLUSTERING,
1701         .max_sectors            = 0xFFFF,
1702 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1703         .proc_info              = sym53c8xx_proc_info,
1704         .proc_name              = NAME53C8XX,
1705 #endif
1706 };
1707
1708 static int attach_count;
1709
1710 static int __devinit sym2_probe(struct pci_dev *pdev,
1711                                 const struct pci_device_id *ent)
1712 {
1713         struct sym_device sym_dev;
1714         struct sym_nvram nvram;
1715         struct Scsi_Host *shost;
1716         int do_iounmap = 0;
1717         int do_disable_device = 1;
1718
1719         memset(&sym_dev, 0, sizeof(sym_dev));
1720         memset(&nvram, 0, sizeof(nvram));
1721         sym_dev.pdev = pdev;
1722         sym_dev.host_id = SYM_SETUP_HOST_ID;
1723
1724         if (pci_enable_device(pdev))
1725                 goto leave;
1726
1727         pci_set_master(pdev);
1728
1729         if (pci_request_regions(pdev, NAME53C8XX))
1730                 goto disable;
1731
1732         if (sym_check_supported(&sym_dev))
1733                 goto free;
1734
1735         if (sym_iomap_device(&sym_dev))
1736                 goto free;
1737         do_iounmap = 1;
1738
1739         if (sym_check_raid(&sym_dev)) {
1740                 do_disable_device = 0;  /* Don't disable the device */
1741                 goto free;
1742         }
1743
1744         if (sym_set_workarounds(&sym_dev))
1745                 goto free;
1746
1747         sym_config_pqs(pdev, &sym_dev);
1748
1749         sym_get_nvram(&sym_dev, &nvram);
1750
1751         do_iounmap = 0; /* Don't sym_iounmap_device() after sym_attach(). */
1752         shost = sym_attach(&sym2_template, attach_count, &sym_dev);
1753         if (!shost)
1754                 goto free;
1755
1756         if (scsi_add_host(shost, &pdev->dev))
1757                 goto detach;
1758         scsi_scan_host(shost);
1759
1760         attach_count++;
1761
1762         return 0;
1763
1764  detach:
1765         sym_detach(pci_get_drvdata(pdev), pdev);
1766  free:
1767         if (do_iounmap)
1768                 sym_iounmap_device(&sym_dev);
1769         pci_release_regions(pdev);
1770  disable:
1771         if (do_disable_device)
1772                 pci_disable_device(pdev);
1773  leave:
1774         return -ENODEV;
1775 }
1776
1777 static void sym2_remove(struct pci_dev *pdev)
1778 {
1779         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1780
1781         scsi_remove_host(shost);
1782         sym_detach(shost, pdev);
1783         pci_release_regions(pdev);
1784         pci_disable_device(pdev);
1785
1786         attach_count--;
1787 }
1788
1789 /**
1790  * sym2_io_error_detected() - called when PCI error is detected
1791  * @pdev: pointer to PCI device
1792  * @state: current state of the PCI slot
1793  */
1794 static pci_ers_result_t sym2_io_error_detected(struct pci_dev *pdev,
1795                                          enum pci_channel_state state)
1796 {
1797         /* If slot is permanently frozen, turn everything off */
1798         if (state == pci_channel_io_perm_failure) {
1799                 sym2_remove(pdev);
1800                 return PCI_ERS_RESULT_DISCONNECT;
1801         }
1802
1803         disable_irq(pdev->irq);
1804         pci_disable_device(pdev);
1805
1806         /* Request that MMIO be enabled, so register dump can be taken. */
1807         return PCI_ERS_RESULT_CAN_RECOVER;
1808 }
1809
1810 /**
1811  * sym2_io_slot_dump - Enable MMIO and dump debug registers
1812  * @pdev: pointer to PCI device
1813  */
1814 static pci_ers_result_t sym2_io_slot_dump(struct pci_dev *pdev)
1815 {
1816         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1817
1818         sym_dump_registers(shost);
1819
1820         /* Request a slot reset. */
1821         return PCI_ERS_RESULT_NEED_RESET;
1822 }
1823
1824 /**
1825  * sym2_reset_workarounds - hardware-specific work-arounds
1826  *
1827  * This routine is similar to sym_set_workarounds(), except
1828  * that, at this point, we already know that the device was
1829  * succesfully intialized at least once before, and so most
1830  * of the steps taken there are un-needed here.
1831  */
1832 static void sym2_reset_workarounds(struct pci_dev *pdev)
1833 {
1834         u_short status_reg;
1835         struct sym_chip *chip;
1836
1837         chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1838
1839         /* Work around for errant bit in 895A, in a fashion
1840          * similar to what is done in sym_set_workarounds().
1841          */
1842         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1843         if (!(chip->features & FE_66MHZ) && (status_reg & PCI_STATUS_66MHZ)) {
1844                 status_reg = PCI_STATUS_66MHZ;
1845                 pci_write_config_word(pdev, PCI_STATUS, status_reg);
1846                 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1847         }
1848 }
1849
1850 /**
1851  * sym2_io_slot_reset() - called when the pci bus has been reset.
1852  * @pdev: pointer to PCI device
1853  *
1854  * Restart the card from scratch.
1855  */
1856 static pci_ers_result_t sym2_io_slot_reset(struct pci_dev *pdev)
1857 {
1858         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1859         struct sym_hcb *np = sym_get_hcb(shost);
1860
1861         printk(KERN_INFO "%s: recovering from a PCI slot reset\n",
1862                   sym_name(np));
1863
1864         if (pci_enable_device(pdev)) {
1865                 printk(KERN_ERR "%s: Unable to enable after PCI reset\n",
1866                         sym_name(np));
1867                 return PCI_ERS_RESULT_DISCONNECT;
1868         }
1869
1870         pci_set_master(pdev);
1871         enable_irq(pdev->irq);
1872
1873         /* If the chip can do Memory Write Invalidate, enable it */
1874         if (np->features & FE_WRIE) {
1875                 if (pci_set_mwi(pdev))
1876                         return PCI_ERS_RESULT_DISCONNECT;
1877         }
1878
1879         /* Perform work-arounds, analogous to sym_set_workarounds() */
1880         sym2_reset_workarounds(pdev);
1881
1882         /* Perform host reset only on one instance of the card */
1883         if (PCI_FUNC(pdev->devfn) == 0) {
1884                 if (sym_reset_scsi_bus(np, 0)) {
1885                         printk(KERN_ERR "%s: Unable to reset scsi host\n",
1886                                 sym_name(np));
1887                         return PCI_ERS_RESULT_DISCONNECT;
1888                 }
1889                 sym_start_up(shost, 1);
1890         }
1891
1892         return PCI_ERS_RESULT_RECOVERED;
1893 }
1894
1895 /**
1896  * sym2_io_resume() - resume normal ops after PCI reset
1897  * @pdev: pointer to PCI device
1898  *
1899  * Called when the error recovery driver tells us that its
1900  * OK to resume normal operation. Use completion to allow
1901  * halted scsi ops to resume.
1902  */
1903 static void sym2_io_resume(struct pci_dev *pdev)
1904 {
1905         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1906         struct sym_data *sym_data = shost_priv(shost);
1907
1908         spin_lock_irq(shost->host_lock);
1909         if (sym_data->io_reset)
1910                 complete_all(sym_data->io_reset);
1911         spin_unlock_irq(shost->host_lock);
1912 }
1913
1914 static void sym2_get_signalling(struct Scsi_Host *shost)
1915 {
1916         struct sym_hcb *np = sym_get_hcb(shost);
1917         enum spi_signal_type type;
1918
1919         switch (np->scsi_mode) {
1920         case SMODE_SE:
1921                 type = SPI_SIGNAL_SE;
1922                 break;
1923         case SMODE_LVD:
1924                 type = SPI_SIGNAL_LVD;
1925                 break;
1926         case SMODE_HVD:
1927                 type = SPI_SIGNAL_HVD;
1928                 break;
1929         default:
1930                 type = SPI_SIGNAL_UNKNOWN;
1931                 break;
1932         }
1933         spi_signalling(shost) = type;
1934 }
1935
1936 static void sym2_set_offset(struct scsi_target *starget, int offset)
1937 {
1938         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1939         struct sym_hcb *np = sym_get_hcb(shost);
1940         struct sym_tcb *tp = &np->target[starget->id];
1941
1942         tp->tgoal.offset = offset;
1943         tp->tgoal.check_nego = 1;
1944 }
1945
1946 static void sym2_set_period(struct scsi_target *starget, int period)
1947 {
1948         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1949         struct sym_hcb *np = sym_get_hcb(shost);
1950         struct sym_tcb *tp = &np->target[starget->id];
1951
1952         /* have to have DT for these transfers, but DT will also
1953          * set width, so check that this is allowed */
1954         if (period <= np->minsync && spi_width(starget))
1955                 tp->tgoal.dt = 1;
1956
1957         tp->tgoal.period = period;
1958         tp->tgoal.check_nego = 1;
1959 }
1960
1961 static void sym2_set_width(struct scsi_target *starget, int width)
1962 {
1963         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1964         struct sym_hcb *np = sym_get_hcb(shost);
1965         struct sym_tcb *tp = &np->target[starget->id];
1966
1967         /* It is illegal to have DT set on narrow transfers.  If DT is
1968          * clear, we must also clear IU and QAS.  */
1969         if (width == 0)
1970                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1971
1972         tp->tgoal.width = width;
1973         tp->tgoal.check_nego = 1;
1974 }
1975
1976 static void sym2_set_dt(struct scsi_target *starget, int dt)
1977 {
1978         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1979         struct sym_hcb *np = sym_get_hcb(shost);
1980         struct sym_tcb *tp = &np->target[starget->id];
1981
1982         /* We must clear QAS and IU if DT is clear */
1983         if (dt)
1984                 tp->tgoal.dt = 1;
1985         else
1986                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1987         tp->tgoal.check_nego = 1;
1988 }
1989
1990 #if 0
1991 static void sym2_set_iu(struct scsi_target *starget, int iu)
1992 {
1993         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1994         struct sym_hcb *np = sym_get_hcb(shost);
1995         struct sym_tcb *tp = &np->target[starget->id];
1996
1997         if (iu)
1998                 tp->tgoal.iu = tp->tgoal.dt = 1;
1999         else
2000                 tp->tgoal.iu = 0;
2001         tp->tgoal.check_nego = 1;
2002 }
2003
2004 static void sym2_set_qas(struct scsi_target *starget, int qas)
2005 {
2006         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2007         struct sym_hcb *np = sym_get_hcb(shost);
2008         struct sym_tcb *tp = &np->target[starget->id];
2009
2010         if (qas)
2011                 tp->tgoal.dt = tp->tgoal.qas = 1;
2012         else
2013                 tp->tgoal.qas = 0;
2014         tp->tgoal.check_nego = 1;
2015 }
2016 #endif
2017
2018 static struct spi_function_template sym2_transport_functions = {
2019         .set_offset     = sym2_set_offset,
2020         .show_offset    = 1,
2021         .set_period     = sym2_set_period,
2022         .show_period    = 1,
2023         .set_width      = sym2_set_width,
2024         .show_width     = 1,
2025         .set_dt         = sym2_set_dt,
2026         .show_dt        = 1,
2027 #if 0
2028         .set_iu         = sym2_set_iu,
2029         .show_iu        = 1,
2030         .set_qas        = sym2_set_qas,
2031         .show_qas       = 1,
2032 #endif
2033         .get_signalling = sym2_get_signalling,
2034 };
2035
2036 static struct pci_device_id sym2_id_table[] __devinitdata = {
2037         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2038           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2039         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2040           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2041         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2042           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2043         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2044           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2045         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2046           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2047         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2048           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2049         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2050           PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL },
2051         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2052           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2053         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2054           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2055         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2056           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2057         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2058           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2059         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2060           PCI_ANY_ID, PCI_ANY_ID,  PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL }, /* new */
2061         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2062           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2063         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2064           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2065         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2066           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2067         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2068           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2069         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2070           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2071         { 0, }
2072 };
2073
2074 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2075
2076 static struct pci_error_handlers sym2_err_handler = {
2077         .error_detected = sym2_io_error_detected,
2078         .mmio_enabled   = sym2_io_slot_dump,
2079         .slot_reset     = sym2_io_slot_reset,
2080         .resume         = sym2_io_resume,
2081 };
2082
2083 static struct pci_driver sym2_driver = {
2084         .name           = NAME53C8XX,
2085         .id_table       = sym2_id_table,
2086         .probe          = sym2_probe,
2087         .remove         = sym2_remove,
2088         .err_handler    = &sym2_err_handler,
2089 };
2090
2091 static int __init sym2_init(void)
2092 {
2093         int error;
2094
2095         sym2_setup_params();
2096         sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2097         if (!sym2_transport_template)
2098                 return -ENODEV;
2099
2100         error = pci_register_driver(&sym2_driver);
2101         if (error)
2102                 spi_release_transport(sym2_transport_template);
2103         return error;
2104 }
2105
2106 static void __exit sym2_exit(void)
2107 {
2108         pci_unregister_driver(&sym2_driver);
2109         spi_release_transport(sym2_transport_template);
2110 }
2111
2112 module_init(sym2_init);
2113 module_exit(sym2_exit);