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, sizeof(cmd->sense_buffer));
 211                         memcpy(cmd->sense_buffer, cp->sns_bbuf,
 212                               min(sizeof(cmd->sense_buffer),
 213                                   (size_t)SYM_SNS_BBUF_LEN));
 214 #if 0
 215                         /*
 216                          *  If the device reports a UNIT ATTENTION condition
 217                          *  due to a RESET condition, we should consider all
 218                          *  disconnect CCBs for this unit as aborted.
 219                          */
 220                         if (1) {
 221                                 u_char *p;
 222                                 p  = (u_char *) cmd->sense_data;
 223                                 if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
 224                                         sym_clear_tasks(np, DID_ABORT,
 225                                                         cp->target,cp->lun, -1);
 226                         }
 227 #endif
 228                 } else {
 229                         /*
 230                          * Error return from our internal request sense.  This
 231                          * is bad: we must clear the contingent allegiance
 232                          * condition otherwise the device will always return
 233                          * BUSY.  Use a big stick.
 234                          */
 235                         sym_reset_scsi_target(np, cmd->device->id);
 236                         cam_status = DID_ERROR;
 237                 }
 238         } else if (cp->host_status == HS_COMPLETE)      /* Bad SCSI status */
 239                 cam_status = DID_OK;
 240         else if (cp->host_status == HS_SEL_TIMEOUT)     /* Selection timeout */
 241                 cam_status = DID_NO_CONNECT;
 242         else if (cp->host_status == HS_UNEXPECTED)      /* Unexpected BUS FREE*/
 243                 cam_status = DID_ERROR;
 244         else {                                          /* Extended error */
 245                 if (sym_verbose) {
 246                         sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
 247                                 cp->host_status, cp->ssss_status,
 248                                 cp->xerr_status);
 249                 }
 250                 /*
 251                  *  Set the most appropriate value for CAM status.
 252                  */
 253                 cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
 254         }
 255         scsi_set_resid(cmd, resid);
 256         cmd->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
 257 }
 258
 259 static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
 260 {
 261         int segment;
 262         int use_sg;
 263
 264         cp->data_len = 0;
 265
 266         use_sg = scsi_dma_map(cmd);
 267         if (use_sg > 0) {
 268                 struct scatterlist *sg;
 269                 struct sym_tcb *tp = &np->target[cp->target];
 270                 struct sym_tblmove *data;
 271
 272                 if (use_sg > SYM_CONF_MAX_SG) {
 273                         scsi_dma_unmap(cmd);
 274                         return -1;
 275                 }
 276
 277                 data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
 278
 279                 scsi_for_each_sg(cmd, sg, use_sg, segment) {
 280                         dma_addr_t baddr = sg_dma_address(sg);
 281                         unsigned int len = sg_dma_len(sg);
 282
 283                         if ((len & 1) && (tp->head.wval & EWS)) {
 284                                 len++;
 285                                 cp->odd_byte_adjustment++;
 286                         }
 287
 288                         sym_build_sge(np, &data[segment], baddr, len);
 289                         cp->data_len += len;
 290                 }
 291         } else {
 292                 segment = -2;
 293         }
 294
 295         return segment;
 296 }
 297
 298 /*
 299  *  Queue a SCSI command.
 300  */
 301 static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd)
 302 {
 303         struct scsi_device *sdev = cmd->device;
 304         struct sym_tcb *tp;
 305         struct sym_lcb *lp;
 306         struct sym_ccb *cp;
 307         int     order;
 308
 309         /*
 310          *  Retrieve the target descriptor.
 311          */
 312         tp = &np->target[sdev->id];
 313
 314         /*
 315          *  Select tagged/untagged.
 316          */
 317         lp = sym_lp(tp, sdev->lun);
 318         order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
 319
 320         /*
 321          *  Queue the SCSI IO.
 322          */
 323         cp = sym_get_ccb(np, cmd, order);
 324         if (!cp)
 325                 return 1;       /* Means resource shortage */
 326         sym_queue_scsiio(np, cmd, cp);
 327         return 0;
 328 }
 329
 330 /*
 331  *  Setup buffers and pointers that address the CDB.
 332  */
 333 static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
 334 {
 335         memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len);
 336
 337         cp->phys.cmd.addr = CCB_BA(cp, cdb_buf[0]);
 338         cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
 339
 340         return 0;
 341 }
 342
 343 /*
 344  *  Setup pointers that address the data and start the I/O.
 345  */
 346 int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
 347 {
 348         u32 lastp, goalp;
 349         int dir;
 350
 351         /*
 352          *  Build the CDB.
 353          */
 354         if (sym_setup_cdb(np, cmd, cp))
 355                 goto out_abort;
 356
 357         /*
 358          *  No direction means no data.
 359          */
 360         dir = cmd->sc_data_direction;
 361         if (dir != DMA_NONE) {
 362                 cp->segments = sym_scatter(np, cp, cmd);
 363                 if (cp->segments < 0) {
 364                         sym_set_cam_status(cmd, DID_ERROR);
 365                         goto out_abort;
 366                 }
 367
 368                 /*
 369                  *  No segments means no data.
 370                  */
 371                 if (!cp->segments)
 372                         dir = DMA_NONE;
 373         } else {
 374                 cp->data_len = 0;
 375                 cp->segments = 0;
 376         }
 377
 378         /*
 379          *  Set the data pointer.
 380          */
 381         switch (dir) {
 382         case DMA_BIDIRECTIONAL:
 383                 scmd_printk(KERN_INFO, cmd, "got DMA_BIDIRECTIONAL command");
 384                 sym_set_cam_status(cmd, DID_ERROR);
 385                 goto out_abort;
 386         case DMA_TO_DEVICE:
 387                 goalp = SCRIPTA_BA(np, data_out2) + 8;
 388                 lastp = goalp - 8 - (cp->segments * (2*4));
 389                 break;
 390         case DMA_FROM_DEVICE:
 391                 cp->host_flags |= HF_DATA_IN;
 392                 goalp = SCRIPTA_BA(np, data_in2) + 8;
 393                 lastp = goalp - 8 - (cp->segments * (2*4));
 394                 break;
 395         case DMA_NONE:
 396         default:
 397                 lastp = goalp = SCRIPTB_BA(np, no_data);
 398                 break;
 399         }
 400
 401         /*
 402          *  Set all pointers values needed by SCRIPTS.
 403          */
 404         cp->phys.head.lastp = cpu_to_scr(lastp);
 405         cp->phys.head.savep = cpu_to_scr(lastp);
 406         cp->startp          = cp->phys.head.savep;
 407         cp->goalp           = cpu_to_scr(goalp);
 408
 409         /*
 410          *  When `#ifed 1', the code below makes the driver
 411          *  panic on the first attempt to write to a SCSI device.
 412          *  It is the first test we want to do after a driver
 413          *  change that does not seem obviously safe. :)
 414          */
 415 #if 0
 416         switch (cp->cdb_buf[0]) {
 417         case 0x0A: case 0x2A: case 0xAA:
 418                 panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
 419                 break;
 420         default:
 421                 break;
 422         }
 423 #endif
 424
 425         /*
 426          *      activate this job.
 427          */
 428         sym_put_start_queue(np, cp);
 429         return 0;
 430
 431 out_abort:
 432         sym_free_ccb(np, cp);
 433         sym_xpt_done(np, cmd);
 434         return 0;
 435 }
 436
 437
 438 /*
 439  *  timer daemon.
 440  *
 441  *  Misused to keep the driver running when
 442  *  interrupts are not configured correctly.
 443  */
 444 static void sym_timer(struct sym_hcb *np)
 445 {
 446         unsigned long thistime = jiffies;
 447
 448         /*
 449          *  Restart the timer.
 450          */
 451         np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
 452         add_timer(&np->s.timer);
 453
 454         /*
 455          *  If we are resetting the ncr, wait for settle_time before
 456          *  clearing it. Then command processing will be resumed.
 457          */
 458         if (np->s.settle_time_valid) {
 459                 if (time_before_eq(np->s.settle_time, thistime)) {
 460                         if (sym_verbose >= 2 )
 461                                 printk("%s: command processing resumed\n",
 462                                        sym_name(np));
 463                         np->s.settle_time_valid = 0;
 464                 }
 465                 return;
 466         }
 467
 468         /*
 469          *      Nothing to do for now, but that may come.
 470          */
 471         if (np->s.lasttime + 4*HZ < thistime) {
 472                 np->s.lasttime = thistime;
 473         }
 474
 475 #ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
 476         /*
 477          *  Some way-broken PCI bridges may lead to
 478          *  completions being lost when the clearing
 479          *  of the INTFLY flag by the CPU occurs
 480          *  concurrently with the chip raising this flag.
 481          *  If this ever happen, lost completions will
 482          * be reaped here.
 483          */
 484         sym_wakeup_done(np);
 485 #endif
 486 }
 487
 488
 489 /*
 490  *  PCI BUS error handler.
 491  */
 492 void sym_log_bus_error(struct Scsi_Host *shost)
 493 {
 494         struct sym_data *sym_data = shost_priv(shost);
 495         struct pci_dev *pdev = sym_data->pdev;
 496         unsigned short pci_sts;
 497         pci_read_config_word(pdev, PCI_STATUS, &pci_sts);
 498         if (pci_sts & 0xf900) {
 499                 pci_write_config_word(pdev, PCI_STATUS, pci_sts);
 500                 shost_printk(KERN_WARNING, shost,
 501                         "PCI bus error: status = 0x%04x\n", pci_sts & 0xf900);
 502         }
 503 }
 504
 505 /*
 506  * queuecommand method.  Entered with the host adapter lock held and
 507  * interrupts disabled.
 508  */
 509 static int sym53c8xx_queue_command(struct scsi_cmnd *cmd,
 510                                         void (*done)(struct scsi_cmnd *))
 511 {
 512         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
 513         struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
 514         int sts = 0;
 515
 516         cmd->scsi_done = done;
 517         memset(ucp, 0, sizeof(*ucp));
 518
 519         /*
 520          *  Shorten our settle_time if needed for
 521          *  this command not to time out.
 522          */
 523         if (np->s.settle_time_valid && cmd->timeout_per_command) {
 524                 unsigned long tlimit = jiffies + cmd->timeout_per_command;
 525                 tlimit -= SYM_CONF_TIMER_INTERVAL*2;
 526                 if (time_after(np->s.settle_time, tlimit)) {
 527                         np->s.settle_time = tlimit;
 528                 }
 529         }
 530
 531         if (np->s.settle_time_valid)
 532                 return SCSI_MLQUEUE_HOST_BUSY;
 533
 534         sts = sym_queue_command(np, cmd);
 535         if (sts)
 536                 return SCSI_MLQUEUE_HOST_BUSY;
 537         return 0;
 538 }
 539
 540 /*
 541  *  Linux entry point of the interrupt handler.
 542  */
 543 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id)
 544 {
 545         struct Scsi_Host *shost = dev_id;
 546         struct sym_data *sym_data = shost_priv(shost);
 547         irqreturn_t result;
 548
 549         /* Avoid spinloop trying to handle interrupts on frozen device */
 550         if (pci_channel_offline(sym_data->pdev))
 551                 return IRQ_NONE;
 552
 553         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
 554
 555         spin_lock(shost->host_lock);
 556         result = sym_interrupt(shost);
 557         spin_unlock(shost->host_lock);
 558
 559         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
 560
 561         return result;
 562 }
 563
 564 /*
 565  *  Linux entry point of the timer handler
 566  */
 567 static void sym53c8xx_timer(unsigned long npref)
 568 {
 569         struct sym_hcb *np = (struct sym_hcb *)npref;
 570         unsigned long flags;
 571
 572         spin_lock_irqsave(np->s.host->host_lock, flags);
 573         sym_timer(np);
 574         spin_unlock_irqrestore(np->s.host->host_lock, flags);
 575 }
 576
 577
 578 /*
 579  *  What the eh thread wants us to perform.
 580  */
 581 #define SYM_EH_ABORT            0
 582 #define SYM_EH_DEVICE_RESET     1
 583 #define SYM_EH_BUS_RESET        2
 584 #define SYM_EH_HOST_RESET       3
 585
 586 /*
 587  *  Generic method for our eh processing.
 588  *  The 'op' argument tells what we have to do.
 589  */
 590 static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
 591 {
 592         struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
 593         struct Scsi_Host *shost = cmd->device->host;
 594         struct sym_data *sym_data = shost_priv(shost);
 595         struct pci_dev *pdev = sym_data->pdev;
 596         struct sym_hcb *np = sym_data->ncb;
 597         SYM_QUEHEAD *qp;
 598         int cmd_queued = 0;
 599         int sts = -1;
 600         struct completion eh_done;
 601
 602         scmd_printk(KERN_WARNING, cmd, "%s operation started\n", opname);
 603
 604         /* We may be in an error condition because the PCI bus
 605          * went down. In this case, we need to wait until the
 606          * PCI bus is reset, the card is reset, and only then
 607          * proceed with the scsi error recovery.  There's no
 608          * point in hurrying; take a leisurely wait.
 609          */
 610 #define WAIT_FOR_PCI_RECOVERY   35
 611         if (pci_channel_offline(pdev)) {
 612                 struct completion *io_reset;
 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                         if (!sym_data->io_reset)
 619                                 sym_data->io_reset = &eh_done;
 620                         io_reset = sym_data->io_reset;
 621                 } else {
 622                         finished_reset = 1;
 623                 }
 624                 spin_unlock_irq(shost->host_lock);
 625                 if (!finished_reset)
 626                         finished_reset = wait_for_completion_timeout(io_reset,
 627                                                 WAIT_FOR_PCI_RECOVERY*HZ);
 628                 if (!finished_reset)
 629                         return SCSI_FAILED;
 630         }
 631
 632         spin_lock_irq(shost->host_lock);
 633         /* This one is queued in some place -> to wait for completion */
 634         FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
 635                 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
 636                 if (cp->cmd == cmd) {
 637                         cmd_queued = 1;
 638                         break;
 639                 }
 640         }
 641
 642         /* Try to proceed the operation we have been asked for */
 643         sts = -1;
 644         switch(op) {
 645         case SYM_EH_ABORT:
 646                 sts = sym_abort_scsiio(np, cmd, 1);
 647                 break;
 648         case SYM_EH_DEVICE_RESET:
 649                 sts = sym_reset_scsi_target(np, cmd->device->id);
 650                 break;
 651         case SYM_EH_BUS_RESET:
 652                 sym_reset_scsi_bus(np, 1);
 653                 sts = 0;
 654                 break;
 655         case SYM_EH_HOST_RESET:
 656                 sym_reset_scsi_bus(np, 0);
 657                 sym_start_up(shost, 1);
 658                 sts = 0;
 659                 break;
 660         default:
 661                 break;
 662         }
 663
 664         /* On error, restore everything and cross fingers :) */
 665         if (sts)
 666                 cmd_queued = 0;
 667
 668         if (cmd_queued) {
 669                 init_completion(&eh_done);
 670                 ucmd->eh_done = &eh_done;
 671                 spin_unlock_irq(shost->host_lock);
 672                 if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
 673                         ucmd->eh_done = NULL;
 674                         sts = -2;
 675                 }
 676         } else {
 677                 spin_unlock_irq(shost->host_lock);
 678         }
 679
 680         dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
 681                         sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
 682         return sts ? SCSI_FAILED : SCSI_SUCCESS;
 683 }
 684
 685
 686 /*
 687  * Error handlers called from the eh thread (one thread per HBA).
 688  */
 689 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
 690 {
 691         return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
 692 }
 693
 694 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
 695 {
 696         return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
 697 }
 698
 699 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
 700 {
 701         return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
 702 }
 703
 704 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
 705 {
 706         return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
 707 }
 708
 709 /*
 710  *  Tune device queuing depth, according to various limits.
 711  */
 712 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
 713 {
 714         struct sym_lcb *lp = sym_lp(tp, lun);
 715         u_short oldtags;
 716
 717         if (!lp)
 718                 return;
 719
 720         oldtags = lp->s.reqtags;
 721
 722         if (reqtags > lp->s.scdev_depth)
 723                 reqtags = lp->s.scdev_depth;
 724
 725         lp->s.reqtags     = reqtags;
 726
 727         if (reqtags != oldtags) {
 728                 dev_info(&tp->starget->dev,
 729                          "tagged command queuing %s, command queue depth %d.\n",
 730                           lp->s.reqtags ? "enabled" : "disabled", reqtags);
 731         }
 732 }
 733
 734 static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
 735 {
 736         struct sym_hcb *np = sym_get_hcb(sdev->host);
 737         struct sym_tcb *tp = &np->target[sdev->id];
 738         struct sym_lcb *lp;
 739
 740         if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
 741                 return -ENXIO;
 742
 743         tp->starget = sdev->sdev_target;
 744         /*
 745          * Fail the device init if the device is flagged NOSCAN at BOOT in
 746          * the NVRAM.  This may speed up boot and maintain coherency with
 747          * BIOS device numbering.  Clearing the flag allows the user to
 748          * rescan skipped devices later.  We also return an error for
 749          * devices not flagged for SCAN LUNS in the NVRAM since some single
 750          * lun devices behave badly when asked for a non zero LUN.
 751          */
 752
 753         if (tp->usrflags & SYM_SCAN_BOOT_DISABLED) {
 754                 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
 755                 starget_printk(KERN_INFO, tp->starget,
 756                                 "Scan at boot disabled in NVRAM\n");
 757                 return -ENXIO;
 758         }
 759
 760         if (tp->usrflags & SYM_SCAN_LUNS_DISABLED) {
 761                 if (sdev->lun != 0)
 762                         return -ENXIO;
 763                 starget_printk(KERN_INFO, tp->starget,
 764                                 "Multiple LUNs disabled in NVRAM\n");
 765         }
 766
 767         lp = sym_alloc_lcb(np, sdev->id, sdev->lun);
 768         if (!lp)
 769                 return -ENOMEM;
 770
 771         spi_min_period(tp->starget) = tp->usr_period;
 772         spi_max_width(tp->starget) = tp->usr_width;
 773
 774         return 0;
 775 }
 776
 777 /*
 778  * Linux entry point for device queue sizing.
 779  */
 780 static int sym53c8xx_slave_configure(struct scsi_device *sdev)
 781 {
 782         struct sym_hcb *np = sym_get_hcb(sdev->host);
 783         struct sym_tcb *tp = &np->target[sdev->id];
 784         struct sym_lcb *lp = sym_lp(tp, sdev->lun);
 785         int reqtags, depth_to_use;
 786
 787         /*
 788          *  Get user flags.
 789          */
 790         lp->curr_flags = lp->user_flags;
 791
 792         /*
 793          *  Select queue depth from driver setup.
 794          *  Donnot use more than configured by user.
 795          *  Use at least 2.
 796          *  Donnot use more than our maximum.
 797          */
 798         reqtags = sym_driver_setup.max_tag;
 799         if (reqtags > tp->usrtags)
 800                 reqtags = tp->usrtags;
 801         if (!sdev->tagged_supported)
 802                 reqtags = 0;
 803         if (reqtags > SYM_CONF_MAX_TAG)
 804                 reqtags = SYM_CONF_MAX_TAG;
 805         depth_to_use = reqtags ? reqtags : 2;
 806         scsi_adjust_queue_depth(sdev,
 807                                 sdev->tagged_supported ? MSG_SIMPLE_TAG : 0,
 808                                 depth_to_use);
 809         lp->s.scdev_depth = depth_to_use;
 810         sym_tune_dev_queuing(tp, sdev->lun, reqtags);
 811
 812         if (!spi_initial_dv(sdev->sdev_target))
 813                 spi_dv_device(sdev);
 814
 815         return 0;
 816 }
 817
 818 static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
 819 {
 820         struct sym_hcb *np = sym_get_hcb(sdev->host);
 821         struct sym_lcb *lp = sym_lp(&np->target[sdev->id], sdev->lun);
 822
 823         if (lp->itlq_tbl)
 824                 sym_mfree_dma(lp->itlq_tbl, SYM_CONF_MAX_TASK * 4, "ITLQ_TBL");
 825         kfree(lp->cb_tags);
 826         sym_mfree_dma(lp, sizeof(*lp), "LCB");
 827 }
 828
 829 /*
 830  *  Linux entry point for info() function
 831  */
 832 static const char *sym53c8xx_info (struct Scsi_Host *host)
 833 {
 834         return SYM_DRIVER_NAME;
 835 }
 836
 837
 838 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
 839 /*
 840  *  Proc file system stuff
 841  *
 842  *  A read operation returns adapter information.
 843  *  A write operation is a control command.
 844  *  The string is parsed in the driver code and the command is passed
 845  *  to the sym_usercmd() function.
 846  */
 847
 848 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
 849
 850 struct  sym_usrcmd {
 851         u_long  target;
 852         u_long  lun;
 853         u_long  data;
 854         u_long  cmd;
 855 };
 856
 857 #define UC_SETSYNC      10
 858 #define UC_SETTAGS      11
 859 #define UC_SETDEBUG     12
 860 #define UC_SETWIDE      14
 861 #define UC_SETFLAG      15
 862 #define UC_SETVERBOSE   17
 863 #define UC_RESETDEV     18
 864 #define UC_CLEARDEV     19
 865
 866 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
 867 {
 868         struct sym_tcb *tp;
 869         int t, l;
 870
 871         switch (uc->cmd) {
 872         case 0: return;
 873
 874 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
 875         case UC_SETDEBUG:
 876                 sym_debug_flags = uc->data;
 877                 break;
 878 #endif
 879         case UC_SETVERBOSE:
 880                 np->verbose = uc->data;
 881                 break;
 882         default:
 883                 /*
 884                  * We assume that other commands apply to targets.
 885                  * This should always be the case and avoid the below
 886                  * 4 lines to be repeated 6 times.
 887                  */
 888                 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
 889                         if (!((uc->target >> t) & 1))
 890                                 continue;
 891                         tp = &np->target[t];
 892
 893                         switch (uc->cmd) {
 894
 895                         case UC_SETSYNC:
 896                                 if (!uc->data || uc->data >= 255) {
 897                                         tp->tgoal.iu = tp->tgoal.dt =
 898                                                 tp->tgoal.qas = 0;
 899                                         tp->tgoal.offset = 0;
 900                                 } else if (uc->data <= 9 && np->minsync_dt) {
 901                                         if (uc->data < np->minsync_dt)
 902                                                 uc->data = np->minsync_dt;
 903                                         tp->tgoal.iu = tp->tgoal.dt =
 904                                                 tp->tgoal.qas = 1;
 905                                         tp->tgoal.width = 1;
 906                                         tp->tgoal.period = uc->data;
 907                                         tp->tgoal.offset = np->maxoffs_dt;
 908                                 } else {
 909                                         if (uc->data < np->minsync)
 910                                                 uc->data = np->minsync;
 911                                         tp->tgoal.iu = tp->tgoal.dt =
 912                                                 tp->tgoal.qas = 0;
 913                                         tp->tgoal.period = uc->data;
 914                                         tp->tgoal.offset = np->maxoffs;
 915                                 }
 916                                 tp->tgoal.check_nego = 1;
 917                                 break;
 918                         case UC_SETWIDE:
 919                                 tp->tgoal.width = uc->data ? 1 : 0;
 920                                 tp->tgoal.check_nego = 1;
 921                                 break;
 922                         case UC_SETTAGS:
 923                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
 924                                         sym_tune_dev_queuing(tp, l, uc->data);
 925                                 break;
 926                         case UC_RESETDEV:
 927                                 tp->to_reset = 1;
 928                                 np->istat_sem = SEM;
 929                                 OUTB(np, nc_istat, SIGP|SEM);
 930                                 break;
 931                         case UC_CLEARDEV:
 932                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
 933                                         struct sym_lcb *lp = sym_lp(tp, l);
 934                                         if (lp) lp->to_clear = 1;
 935                                 }
 936                                 np->istat_sem = SEM;
 937                                 OUTB(np, nc_istat, SIGP|SEM);
 938                                 break;
 939                         case UC_SETFLAG:
 940                                 tp->usrflags = uc->data;
 941                                 break;
 942                         }
 943                 }
 944                 break;
 945         }
 946 }
 947
 948 static int skip_spaces(char *ptr, int len)
 949 {
 950         int cnt, c;
 951
 952         for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
 953
 954         return (len - cnt);
 955 }
 956
 957 static int get_int_arg(char *ptr, int len, u_long *pv)
 958 {
 959         char *end;
 960
 961         *pv = simple_strtoul(ptr, &end, 10);
 962         return (end - ptr);
 963 }
 964
 965 static int is_keyword(char *ptr, int len, char *verb)
 966 {
 967         int verb_len = strlen(verb);
 968
 969         if (len >= verb_len && !memcmp(verb, ptr, verb_len))
 970                 return verb_len;
 971         else
 972                 return 0;
 973 }
 974
 975 #define SKIP_SPACES(ptr, len)                                           \
 976         if ((arg_len = skip_spaces(ptr, len)) < 1)                      \
 977                 return -EINVAL;                                         \
 978         ptr += arg_len; len -= arg_len;
 979
 980 #define GET_INT_ARG(ptr, len, v)                                        \
 981         if (!(arg_len = get_int_arg(ptr, len, &(v))))                   \
 982                 return -EINVAL;                                         \
 983         ptr += arg_len; len -= arg_len;
 984
 985
 986 /*
 987  * Parse a control command
 988  */
 989
 990 static int sym_user_command(struct Scsi_Host *shost, char *buffer, int length)
 991 {
 992         struct sym_hcb *np = sym_get_hcb(shost);
 993         char *ptr       = buffer;
 994         int len         = length;
 995         struct sym_usrcmd cmd, *uc = &cmd;
 996         int             arg_len;
 997         u_long          target;
 998
 999         memset(uc, 0, sizeof(*uc));
1000
1001         if (len > 0 && ptr[len-1] == '\n')
1002                 --len;
1003
1004         if      ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1005                 uc->cmd = UC_SETSYNC;
1006         else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1007                 uc->cmd = UC_SETTAGS;
1008         else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1009                 uc->cmd = UC_SETVERBOSE;
1010         else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1011                 uc->cmd = UC_SETWIDE;
1012 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1013         else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1014                 uc->cmd = UC_SETDEBUG;
1015 #endif
1016         else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1017                 uc->cmd = UC_SETFLAG;
1018         else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1019                 uc->cmd = UC_RESETDEV;
1020         else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1021                 uc->cmd = UC_CLEARDEV;
1022         else
1023                 arg_len = 0;
1024
1025 #ifdef DEBUG_PROC_INFO
1026 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1027 #endif
1028
1029         if (!arg_len)
1030                 return -EINVAL;
1031         ptr += arg_len; len -= arg_len;
1032
1033         switch(uc->cmd) {
1034         case UC_SETSYNC:
1035         case UC_SETTAGS:
1036         case UC_SETWIDE:
1037         case UC_SETFLAG:
1038         case UC_RESETDEV:
1039         case UC_CLEARDEV:
1040                 SKIP_SPACES(ptr, len);
1041                 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1042                         ptr += arg_len; len -= arg_len;
1043                         uc->target = ~0;
1044                 } else {
1045                         GET_INT_ARG(ptr, len, target);
1046                         uc->target = (1<<target);
1047 #ifdef DEBUG_PROC_INFO
1048 printk("sym_user_command: target=%ld\n", target);
1049 #endif
1050                 }
1051                 break;
1052         }
1053
1054         switch(uc->cmd) {
1055         case UC_SETVERBOSE:
1056         case UC_SETSYNC:
1057         case UC_SETTAGS:
1058         case UC_SETWIDE:
1059                 SKIP_SPACES(ptr, len);
1060                 GET_INT_ARG(ptr, len, uc->data);
1061 #ifdef DEBUG_PROC_INFO
1062 printk("sym_user_command: data=%ld\n", uc->data);
1063 #endif
1064                 break;
1065 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1066         case UC_SETDEBUG:
1067                 while (len > 0) {
1068                         SKIP_SPACES(ptr, len);
1069                         if      ((arg_len = is_keyword(ptr, len, "alloc")))
1070                                 uc->data |= DEBUG_ALLOC;
1071                         else if ((arg_len = is_keyword(ptr, len, "phase")))
1072                                 uc->data |= DEBUG_PHASE;
1073                         else if ((arg_len = is_keyword(ptr, len, "queue")))
1074                                 uc->data |= DEBUG_QUEUE;
1075                         else if ((arg_len = is_keyword(ptr, len, "result")))
1076                                 uc->data |= DEBUG_RESULT;
1077                         else if ((arg_len = is_keyword(ptr, len, "scatter")))
1078                                 uc->data |= DEBUG_SCATTER;
1079                         else if ((arg_len = is_keyword(ptr, len, "script")))
1080                                 uc->data |= DEBUG_SCRIPT;
1081                         else if ((arg_len = is_keyword(ptr, len, "tiny")))
1082                                 uc->data |= DEBUG_TINY;
1083                         else if ((arg_len = is_keyword(ptr, len, "timing")))
1084                                 uc->data |= DEBUG_TIMING;
1085                         else if ((arg_len = is_keyword(ptr, len, "nego")))
1086                                 uc->data |= DEBUG_NEGO;
1087                         else if ((arg_len = is_keyword(ptr, len, "tags")))
1088                                 uc->data |= DEBUG_TAGS;
1089                         else if ((arg_len = is_keyword(ptr, len, "pointer")))
1090                                 uc->data |= DEBUG_POINTER;
1091                         else
1092                                 return -EINVAL;
1093                         ptr += arg_len; len -= arg_len;
1094                 }
1095 #ifdef DEBUG_PROC_INFO
1096 printk("sym_user_command: data=%ld\n", uc->data);
1097 #endif
1098                 break;
1099 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1100         case UC_SETFLAG:
1101                 while (len > 0) {
1102                         SKIP_SPACES(ptr, len);
1103                         if      ((arg_len = is_keyword(ptr, len, "no_disc")))
1104                                 uc->data &= ~SYM_DISC_ENABLED;
1105                         else
1106                                 return -EINVAL;
1107                         ptr += arg_len; len -= arg_len;
1108                 }
1109                 break;
1110         default:
1111                 break;
1112         }
1113
1114         if (len)
1115                 return -EINVAL;
1116         else {
1117                 unsigned long flags;
1118
1119                 spin_lock_irqsave(shost->host_lock, flags);
1120                 sym_exec_user_command(np, uc);
1121                 spin_unlock_irqrestore(shost->host_lock, flags);
1122         }
1123         return length;
1124 }
1125
1126 #endif  /* SYM_LINUX_USER_COMMAND_SUPPORT */
1127
1128
1129 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1130 /*
1131  *  Informations through the proc file system.
1132  */
1133 struct info_str {
1134         char *buffer;
1135         int length;
1136         int offset;
1137         int pos;
1138 };
1139
1140 static void copy_mem_info(struct info_str *info, char *data, int len)
1141 {
1142         if (info->pos + len > info->length)
1143                 len = info->length - info->pos;
1144
1145         if (info->pos + len < info->offset) {
1146                 info->pos += len;
1147                 return;
1148         }
1149         if (info->pos < info->offset) {
1150                 data += (info->offset - info->pos);
1151                 len  -= (info->offset - info->pos);
1152         }
1153
1154         if (len > 0) {
1155                 memcpy(info->buffer + info->pos, data, len);
1156                 info->pos += len;
1157         }
1158 }
1159
1160 static int copy_info(struct info_str *info, char *fmt, ...)
1161 {
1162         va_list args;
1163         char buf[81];
1164         int len;
1165
1166         va_start(args, fmt);
1167         len = vsprintf(buf, fmt, args);
1168         va_end(args);
1169
1170         copy_mem_info(info, buf, len);
1171         return len;
1172 }
1173
1174 /*
1175  *  Copy formatted information into the input buffer.
1176  */
1177 static int sym_host_info(struct Scsi_Host *shost, char *ptr, off_t offset, int len)
1178 {
1179         struct sym_data *sym_data = shost_priv(shost);
1180         struct pci_dev *pdev = sym_data->pdev;
1181         struct sym_hcb *np = sym_data->ncb;
1182         struct info_str info;
1183
1184         info.buffer     = ptr;
1185         info.length     = len;
1186         info.offset     = offset;
1187         info.pos        = 0;
1188
1189         copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1190                          "revision id 0x%x\n", np->s.chip_name,
1191                          pdev->device, pdev->revision);
1192         copy_info(&info, "At PCI address %s, IRQ %u\n",
1193                          pci_name(pdev), pdev->irq);
1194         copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1195                          (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1196                          np->maxwide ? "Wide" : "Narrow",
1197                          np->minsync_dt ? ", DT capable" : "");
1198
1199         copy_info(&info, "Max. started commands %d, "
1200                          "max. commands per LUN %d\n",
1201                          SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1202
1203         return info.pos > info.offset? info.pos - info.offset : 0;
1204 }
1205 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1206
1207 /*
1208  *  Entry point of the scsi proc fs of the driver.
1209  *  - func = 0 means read  (returns adapter infos)
1210  *  - func = 1 means write (not yet merget from sym53c8xx)
1211  */
1212 static int sym53c8xx_proc_info(struct Scsi_Host *shost, char *buffer,
1213                         char **start, off_t offset, int length, int func)
1214 {
1215         int retv;
1216
1217         if (func) {
1218 #ifdef  SYM_LINUX_USER_COMMAND_SUPPORT
1219                 retv = sym_user_command(shost, buffer, length);
1220 #else
1221                 retv = -EINVAL;
1222 #endif
1223         } else {
1224                 if (start)
1225                         *start = buffer;
1226 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1227                 retv = sym_host_info(shost, buffer, offset, length);
1228 #else
1229                 retv = -EINVAL;
1230 #endif
1231         }
1232
1233         return retv;
1234 }
1235 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1236
1237 /*
1238  *      Free controller resources.
1239  */
1240 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev)
1241 {
1242         /*
1243          *  Free O/S specific resources.
1244          */
1245         if (pdev->irq)
1246                 free_irq(pdev->irq, np);
1247         if (np->s.ioaddr)
1248                 pci_iounmap(pdev, np->s.ioaddr);
1249         if (np->s.ramaddr)
1250                 pci_iounmap(pdev, np->s.ramaddr);
1251         /*
1252          *  Free O/S independent resources.
1253          */
1254         sym_hcb_free(np);
1255
1256         sym_mfree_dma(np, sizeof(*np), "HCB");
1257 }
1258
1259 /*
1260  *  Host attach and initialisations.
1261  *
1262  *  Allocate host data and ncb structure.
1263  *  Remap MMIO region.
1264  *  Do chip initialization.
1265  *  If all is OK, install interrupt handling and
1266  *  start the timer daemon.
1267  */
1268 static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1269                 int unit, struct sym_device *dev)
1270 {
1271         struct sym_data *sym_data;
1272         struct sym_hcb *np = NULL;
1273         struct Scsi_Host *shost;
1274         struct pci_dev *pdev = dev->pdev;
1275         unsigned long flags;
1276         struct sym_fw *fw;
1277
1278         printk(KERN_INFO "sym%d: <%s> rev 0x%x at pci %s irq %u\n",
1279                 unit, dev->chip.name, pdev->revision, pci_name(pdev),
1280                 pdev->irq);
1281
1282         /*
1283          *  Get the firmware for this chip.
1284          */
1285         fw = sym_find_firmware(&dev->chip);
1286         if (!fw)
1287                 return NULL;
1288
1289         shost = scsi_host_alloc(tpnt, sizeof(*sym_data));
1290         if (!shost)
1291                 return NULL;
1292         sym_data = shost_priv(shost);
1293
1294         /*
1295          *  Allocate immediately the host control block,
1296          *  since we are only expecting to succeed. :)
1297          *  We keep track in the HCB of all the resources that
1298          *  are to be released on error.
1299          */
1300         np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1301         if (!np)
1302                 goto attach_failed;
1303         np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1304         sym_data->ncb = np;
1305         sym_data->pdev = pdev;
1306         np->s.host = shost;
1307
1308         pci_set_drvdata(pdev, shost);
1309
1310         /*
1311          *  Copy some useful infos to the HCB.
1312          */
1313         np->hcb_ba      = vtobus(np);
1314         np->verbose     = sym_driver_setup.verbose;
1315         np->s.unit      = unit;
1316         np->features    = dev->chip.features;
1317         np->clock_divn  = dev->chip.nr_divisor;
1318         np->maxoffs     = dev->chip.offset_max;
1319         np->maxburst    = dev->chip.burst_max;
1320         np->myaddr      = dev->host_id;
1321
1322         /*
1323          *  Edit its name.
1324          */
1325         strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1326         sprintf(np->s.inst_name, "sym%d", np->s.unit);
1327
1328         if ((SYM_CONF_DMA_ADDRESSING_MODE > 0) && (np->features & FE_DAC) &&
1329                         !pci_set_dma_mask(pdev, DMA_DAC_MASK)) {
1330                 set_dac(np);
1331         } else if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
1332                 printf_warning("%s: No suitable DMA available\n", sym_name(np));
1333                 goto attach_failed;
1334         }
1335
1336         /*
1337          *  Try to map the controller chip to
1338          *  virtual and physical memory.
1339          */
1340         np->mmio_ba = (u32)dev->mmio_base;
1341         np->s.ioaddr    = dev->s.ioaddr;
1342         np->s.ramaddr   = dev->s.ramaddr;
1343
1344         /*
1345          *  Map on-chip RAM if present and supported.
1346          */
1347         if (!(np->features & FE_RAM))
1348                 dev->ram_base = 0;
1349         if (dev->ram_base)
1350                 np->ram_ba = (u32)dev->ram_base;
1351
1352         if (sym_hcb_attach(shost, fw, dev->nvram))
1353                 goto attach_failed;
1354
1355         /*
1356          *  Install the interrupt handler.
1357          *  If we synchonize the C code with SCRIPTS on interrupt,
1358          *  we do not want to share the INTR line at all.
1359          */
1360         if (request_irq(pdev->irq, sym53c8xx_intr, IRQF_SHARED, NAME53C8XX,
1361                         shost)) {
1362                 printf_err("%s: request irq %u failure\n",
1363                         sym_name(np), pdev->irq);
1364                 goto attach_failed;
1365         }
1366
1367         /*
1368          *  After SCSI devices have been opened, we cannot
1369          *  reset the bus safely, so we do it here.
1370          */
1371         spin_lock_irqsave(shost->host_lock, flags);
1372         if (sym_reset_scsi_bus(np, 0))
1373                 goto reset_failed;
1374
1375         /*
1376          *  Start the SCRIPTS.
1377          */
1378         sym_start_up(shost, 1);
1379
1380         /*
1381          *  Start the timer daemon
1382          */
1383         init_timer(&np->s.timer);
1384         np->s.timer.data     = (unsigned long) np;
1385         np->s.timer.function = sym53c8xx_timer;
1386         np->s.lasttime=0;
1387         sym_timer (np);
1388
1389         /*
1390          *  Fill Linux host instance structure
1391          *  and return success.
1392          */
1393         shost->max_channel      = 0;
1394         shost->this_id          = np->myaddr;
1395         shost->max_id           = np->maxwide ? 16 : 8;
1396         shost->max_lun          = SYM_CONF_MAX_LUN;
1397         shost->unique_id        = pci_resource_start(pdev, 0);
1398         shost->cmd_per_lun      = SYM_CONF_MAX_TAG;
1399         shost->can_queue        = (SYM_CONF_MAX_START-2);
1400         shost->sg_tablesize     = SYM_CONF_MAX_SG;
1401         shost->max_cmd_len      = 16;
1402         BUG_ON(sym2_transport_template == NULL);
1403         shost->transportt       = sym2_transport_template;
1404
1405         /* 53c896 rev 1 errata: DMA may not cross 16MB boundary */
1406         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 2)
1407                 shost->dma_boundary = 0xFFFFFF;
1408
1409         spin_unlock_irqrestore(shost->host_lock, flags);
1410
1411         return shost;
1412
1413  reset_failed:
1414         printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1415                    "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1416         spin_unlock_irqrestore(shost->host_lock, flags);
1417  attach_failed:
1418         if (!shost)
1419                 return NULL;
1420         printf_info("%s: giving up ...\n", sym_name(np));
1421         if (np)
1422                 sym_free_resources(np, pdev);
1423         scsi_host_put(shost);
1424
1425         return NULL;
1426  }
1427
1428
1429 /*
1430  *    Detect and try to read SYMBIOS and TEKRAM NVRAM.
1431  */
1432 #if SYM_CONF_NVRAM_SUPPORT
1433 static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1434 {
1435         devp->nvram = nvp;
1436         nvp->type = 0;
1437
1438         sym_read_nvram(devp, nvp);
1439 }
1440 #else
1441 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1442 {
1443 }
1444 #endif  /* SYM_CONF_NVRAM_SUPPORT */
1445
1446 static int __devinit sym_check_supported(struct sym_device *device)
1447 {
1448         struct sym_chip *chip;
1449         struct pci_dev *pdev = device->pdev;
1450         unsigned long io_port = pci_resource_start(pdev, 0);
1451         int i;
1452
1453         /*
1454          *  If user excluded this chip, do not initialize it.
1455          *  I hate this code so much.  Must kill it.
1456          */
1457         if (io_port) {
1458                 for (i = 0 ; i < 8 ; i++) {
1459                         if (sym_driver_setup.excludes[i] == io_port)
1460                                 return -ENODEV;
1461                 }
1462         }
1463
1464         /*
1465          * Check if the chip is supported.  Then copy the chip description
1466          * to our device structure so we can make it match the actual device
1467          * and options.
1468          */
1469         chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1470         if (!chip) {
1471                 dev_info(&pdev->dev, "device not supported\n");
1472                 return -ENODEV;
1473         }
1474         memcpy(&device->chip, chip, sizeof(device->chip));
1475
1476         return 0;
1477 }
1478
1479 /*
1480  * Ignore Symbios chips controlled by various RAID controllers.
1481  * These controllers set value 0x52414944 at RAM end - 16.
1482  */
1483 static int __devinit sym_check_raid(struct sym_device *device)
1484 {
1485         unsigned int ram_size, ram_val;
1486
1487         if (!device->s.ramaddr)
1488                 return 0;
1489
1490         if (device->chip.features & FE_RAM8K)
1491                 ram_size = 8192;
1492         else
1493                 ram_size = 4096;
1494
1495         ram_val = readl(device->s.ramaddr + ram_size - 16);
1496         if (ram_val != 0x52414944)
1497                 return 0;
1498
1499         dev_info(&device->pdev->dev,
1500                         "not initializing, driven by RAID controller.\n");
1501         return -ENODEV;
1502 }
1503
1504 static int __devinit sym_set_workarounds(struct sym_device *device)
1505 {
1506         struct sym_chip *chip = &device->chip;
1507         struct pci_dev *pdev = device->pdev;
1508         u_short status_reg;
1509
1510         /*
1511          *  (ITEM 12 of a DEL about the 896 I haven't yet).
1512          *  We must ensure the chip will use WRITE AND INVALIDATE.
1513          *  The revision number limit is for now arbitrary.
1514          */
1515         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 0x4) {
1516                 chip->features  |= (FE_WRIE | FE_CLSE);
1517         }
1518
1519         /* If the chip can do Memory Write Invalidate, enable it */
1520         if (chip->features & FE_WRIE) {
1521                 if (pci_set_mwi(pdev))
1522                         return -ENODEV;
1523         }
1524
1525         /*
1526          *  Work around for errant bit in 895A. The 66Mhz
1527          *  capable bit is set erroneously. Clear this bit.
1528          *  (Item 1 DEL 533)
1529          *
1530          *  Make sure Config space and Features agree.
1531          *
1532          *  Recall: writes are not normal to status register -
1533          *  write a 1 to clear and a 0 to leave unchanged.
1534          *  Can only reset bits.
1535          */
1536         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1537         if (chip->features & FE_66MHZ) {
1538                 if (!(status_reg & PCI_STATUS_66MHZ))
1539                         chip->features &= ~FE_66MHZ;
1540         } else {
1541                 if (status_reg & PCI_STATUS_66MHZ) {
1542                         status_reg = PCI_STATUS_66MHZ;
1543                         pci_write_config_word(pdev, PCI_STATUS, status_reg);
1544                         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1545                 }
1546         }
1547
1548         return 0;
1549 }
1550
1551 /*
1552  *  Read and check the PCI configuration for any detected NCR
1553  *  boards and save data for attaching after all boards have
1554  *  been detected.
1555  */
1556 static void __devinit
1557 sym_init_device(struct pci_dev *pdev, struct sym_device *device)
1558 {
1559         int i = 2;
1560         struct pci_bus_region bus_addr;
1561
1562         device->host_id = SYM_SETUP_HOST_ID;
1563         device->pdev = pdev;
1564
1565         pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[1]);
1566         device->mmio_base = bus_addr.start;
1567
1568         /*
1569          * If the BAR is 64-bit, resource 2 will be occupied by the
1570          * upper 32 bits
1571          */
1572         if (!pdev->resource[i].flags)
1573                 i++;
1574         pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[i]);
1575         device->ram_base = bus_addr.start;
1576
1577 #ifdef CONFIG_SCSI_SYM53C8XX_MMIO
1578         if (device->mmio_base)
1579                 device->s.ioaddr = pci_iomap(pdev, 1,
1580                                                 pci_resource_len(pdev, 1));
1581 #endif
1582         if (!device->s.ioaddr)
1583                 device->s.ioaddr = pci_iomap(pdev, 0,
1584                                                 pci_resource_len(pdev, 0));
1585         if (device->ram_base)
1586                 device->s.ramaddr = pci_iomap(pdev, i,
1587                                                 pci_resource_len(pdev, i));
1588 }
1589
1590 /*
1591  * The NCR PQS and PDS cards are constructed as a DEC bridge
1592  * behind which sits a proprietary NCR memory controller and
1593  * either four or two 53c875s as separate devices.  We can tell
1594  * if an 875 is part of a PQS/PDS or not since if it is, it will
1595  * be on the same bus as the memory controller.  In its usual
1596  * mode of operation, the 875s are slaved to the memory
1597  * controller for all transfers.  To operate with the Linux
1598  * driver, the memory controller is disabled and the 875s
1599  * freed to function independently.  The only wrinkle is that
1600  * the preset SCSI ID (which may be zero) must be read in from
1601  * a special configuration space register of the 875.
1602  */
1603 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1604 {
1605         int slot;
1606         u8 tmp;
1607
1608         for (slot = 0; slot < 256; slot++) {
1609                 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1610
1611                 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1612                         pci_dev_put(memc);
1613                         continue;
1614                 }
1615
1616                 /* bit 1: allow individual 875 configuration */
1617                 pci_read_config_byte(memc, 0x44, &tmp);
1618                 if ((tmp & 0x2) == 0) {
1619                         tmp |= 0x2;
1620                         pci_write_config_byte(memc, 0x44, tmp);
1621                 }
1622
1623                 /* bit 2: drive individual 875 interrupts to the bus */
1624                 pci_read_config_byte(memc, 0x45, &tmp);
1625                 if ((tmp & 0x4) == 0) {
1626                         tmp |= 0x4;
1627                         pci_write_config_byte(memc, 0x45, tmp);
1628                 }
1629
1630                 pci_dev_put(memc);
1631                 break;
1632         }
1633
1634         pci_read_config_byte(pdev, 0x84, &tmp);
1635         sym_dev->host_id = tmp;
1636 }
1637
1638 /*
1639  *  Called before unloading the module.
1640  *  Detach the host.
1641  *  We have to free resources and halt the NCR chip.
1642  */
1643 static int sym_detach(struct Scsi_Host *shost, struct pci_dev *pdev)
1644 {
1645         struct sym_hcb *np = sym_get_hcb(shost);
1646         printk("%s: detaching ...\n", sym_name(np));
1647
1648         del_timer_sync(&np->s.timer);
1649
1650         /*
1651          * Reset NCR chip.
1652          * We should use sym_soft_reset(), but we don't want to do
1653          * so, since we may not be safe if interrupts occur.
1654          */
1655         printk("%s: resetting chip\n", sym_name(np));
1656         OUTB(np, nc_istat, SRST);
1657         INB(np, nc_mbox1);
1658         udelay(10);
1659         OUTB(np, nc_istat, 0);
1660
1661         sym_free_resources(np, pdev);
1662
1663         return 1;
1664 }
1665
1666 /*
1667  * Driver host template.
1668  */
1669 static struct scsi_host_template sym2_template = {
1670         .module                 = THIS_MODULE,
1671         .name                   = "sym53c8xx",
1672         .info                   = sym53c8xx_info,
1673         .queuecommand           = sym53c8xx_queue_command,
1674         .slave_alloc            = sym53c8xx_slave_alloc,
1675         .slave_configure        = sym53c8xx_slave_configure,
1676         .slave_destroy          = sym53c8xx_slave_destroy,
1677         .eh_abort_handler       = sym53c8xx_eh_abort_handler,
1678         .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1679         .eh_bus_reset_handler   = sym53c8xx_eh_bus_reset_handler,
1680         .eh_host_reset_handler  = sym53c8xx_eh_host_reset_handler,
1681         .this_id                = 7,
1682         .use_clustering         = ENABLE_CLUSTERING,
1683         .use_sg_chaining        = ENABLE_SG_CHAINING,
1684         .max_sectors            = 0xFFFF,
1685 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1686         .proc_info              = sym53c8xx_proc_info,
1687         .proc_name              = NAME53C8XX,
1688 #endif
1689 };
1690
1691 static int attach_count;
1692
1693 static int __devinit sym2_probe(struct pci_dev *pdev,
1694                                 const struct pci_device_id *ent)
1695 {
1696         struct sym_device sym_dev;
1697         struct sym_nvram nvram;
1698         struct Scsi_Host *shost;
1699
1700         memset(&sym_dev, 0, sizeof(sym_dev));
1701         memset(&nvram, 0, sizeof(nvram));
1702
1703         if (pci_enable_device(pdev))
1704                 goto leave;
1705
1706         pci_set_master(pdev);
1707
1708         if (pci_request_regions(pdev, NAME53C8XX))
1709                 goto disable;
1710
1711         sym_init_device(pdev, &sym_dev);
1712         if (sym_check_supported(&sym_dev))
1713                 goto free;
1714
1715         if (sym_check_raid(&sym_dev))
1716                 goto leave;     /* Don't disable the device */
1717
1718         if (sym_set_workarounds(&sym_dev))
1719                 goto free;
1720
1721         sym_config_pqs(pdev, &sym_dev);
1722
1723         sym_get_nvram(&sym_dev, &nvram);
1724
1725         shost = sym_attach(&sym2_template, attach_count, &sym_dev);
1726         if (!shost)
1727                 goto free;
1728
1729         if (scsi_add_host(shost, &pdev->dev))
1730                 goto detach;
1731         scsi_scan_host(shost);
1732
1733         attach_count++;
1734
1735         return 0;
1736
1737  detach:
1738         sym_detach(pci_get_drvdata(pdev), pdev);
1739  free:
1740         pci_release_regions(pdev);
1741  disable:
1742         pci_disable_device(pdev);
1743  leave:
1744         return -ENODEV;
1745 }
1746
1747 static void __devexit sym2_remove(struct pci_dev *pdev)
1748 {
1749         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1750
1751         scsi_remove_host(shost);
1752         scsi_host_put(shost);
1753         sym_detach(shost, pdev);
1754         pci_release_regions(pdev);
1755         pci_disable_device(pdev);
1756
1757         attach_count--;
1758 }
1759
1760 /**
1761  * sym2_io_error_detected() - called when PCI error is detected
1762  * @pdev: pointer to PCI device
1763  * @state: current state of the PCI slot
1764  */
1765 static pci_ers_result_t sym2_io_error_detected(struct pci_dev *pdev,
1766                                          enum pci_channel_state state)
1767 {
1768         /* If slot is permanently frozen, turn everything off */
1769         if (state == pci_channel_io_perm_failure) {
1770                 sym2_remove(pdev);
1771                 return PCI_ERS_RESULT_DISCONNECT;
1772         }
1773
1774         disable_irq(pdev->irq);
1775         pci_disable_device(pdev);
1776
1777         /* Request that MMIO be enabled, so register dump can be taken. */
1778         return PCI_ERS_RESULT_CAN_RECOVER;
1779 }
1780
1781 /**
1782  * sym2_io_slot_dump - Enable MMIO and dump debug registers
1783  * @pdev: pointer to PCI device
1784  */
1785 static pci_ers_result_t sym2_io_slot_dump(struct pci_dev *pdev)
1786 {
1787         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1788
1789         sym_dump_registers(shost);
1790
1791         /* Request a slot reset. */
1792         return PCI_ERS_RESULT_NEED_RESET;
1793 }
1794
1795 /**
1796  * sym2_reset_workarounds - hardware-specific work-arounds
1797  *
1798  * This routine is similar to sym_set_workarounds(), except
1799  * that, at this point, we already know that the device was
1800  * succesfully intialized at least once before, and so most
1801  * of the steps taken there are un-needed here.
1802  */
1803 static void sym2_reset_workarounds(struct pci_dev *pdev)
1804 {
1805         u_short status_reg;
1806         struct sym_chip *chip;
1807
1808         chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1809
1810         /* Work around for errant bit in 895A, in a fashion
1811          * similar to what is done in sym_set_workarounds().
1812          */
1813         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1814         if (!(chip->features & FE_66MHZ) && (status_reg & PCI_STATUS_66MHZ)) {
1815                 status_reg = PCI_STATUS_66MHZ;
1816                 pci_write_config_word(pdev, PCI_STATUS, status_reg);
1817                 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1818         }
1819 }
1820
1821 /**
1822  * sym2_io_slot_reset() - called when the pci bus has been reset.
1823  * @pdev: pointer to PCI device
1824  *
1825  * Restart the card from scratch.
1826  */
1827 static pci_ers_result_t sym2_io_slot_reset(struct pci_dev *pdev)
1828 {
1829         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1830         struct sym_hcb *np = sym_get_hcb(shost);
1831
1832         printk(KERN_INFO "%s: recovering from a PCI slot reset\n",
1833                   sym_name(np));
1834
1835         if (pci_enable_device(pdev)) {
1836                 printk(KERN_ERR "%s: Unable to enable after PCI reset\n",
1837                         sym_name(np));
1838                 return PCI_ERS_RESULT_DISCONNECT;
1839         }
1840
1841         pci_set_master(pdev);
1842         enable_irq(pdev->irq);
1843
1844         /* If the chip can do Memory Write Invalidate, enable it */
1845         if (np->features & FE_WRIE) {
1846                 if (pci_set_mwi(pdev))
1847                         return PCI_ERS_RESULT_DISCONNECT;
1848         }
1849
1850         /* Perform work-arounds, analogous to sym_set_workarounds() */
1851         sym2_reset_workarounds(pdev);
1852
1853         /* Perform host reset only on one instance of the card */
1854         if (PCI_FUNC(pdev->devfn) == 0) {
1855                 if (sym_reset_scsi_bus(np, 0)) {
1856                         printk(KERN_ERR "%s: Unable to reset scsi host\n",
1857                                 sym_name(np));
1858                         return PCI_ERS_RESULT_DISCONNECT;
1859                 }
1860                 sym_start_up(shost, 1);
1861         }
1862
1863         return PCI_ERS_RESULT_RECOVERED;
1864 }
1865
1866 /**
1867  * sym2_io_resume() - resume normal ops after PCI reset
1868  * @pdev: pointer to PCI device
1869  *
1870  * Called when the error recovery driver tells us that its
1871  * OK to resume normal operation. Use completion to allow
1872  * halted scsi ops to resume.
1873  */
1874 static void sym2_io_resume(struct pci_dev *pdev)
1875 {
1876         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1877         struct sym_data *sym_data = shost_priv(shost);
1878
1879         spin_lock_irq(shost->host_lock);
1880         if (sym_data->io_reset)
1881                 complete_all(sym_data->io_reset);
1882         sym_data->io_reset = NULL;
1883         spin_unlock_irq(shost->host_lock);
1884 }
1885
1886 static void sym2_get_signalling(struct Scsi_Host *shost)
1887 {
1888         struct sym_hcb *np = sym_get_hcb(shost);
1889         enum spi_signal_type type;
1890
1891         switch (np->scsi_mode) {
1892         case SMODE_SE:
1893                 type = SPI_SIGNAL_SE;
1894                 break;
1895         case SMODE_LVD:
1896                 type = SPI_SIGNAL_LVD;
1897                 break;
1898         case SMODE_HVD:
1899                 type = SPI_SIGNAL_HVD;
1900                 break;
1901         default:
1902                 type = SPI_SIGNAL_UNKNOWN;
1903                 break;
1904         }
1905         spi_signalling(shost) = type;
1906 }
1907
1908 static void sym2_set_offset(struct scsi_target *starget, int offset)
1909 {
1910         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1911         struct sym_hcb *np = sym_get_hcb(shost);
1912         struct sym_tcb *tp = &np->target[starget->id];
1913
1914         tp->tgoal.offset = offset;
1915         tp->tgoal.check_nego = 1;
1916 }
1917
1918 static void sym2_set_period(struct scsi_target *starget, int period)
1919 {
1920         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1921         struct sym_hcb *np = sym_get_hcb(shost);
1922         struct sym_tcb *tp = &np->target[starget->id];
1923
1924         /* have to have DT for these transfers, but DT will also
1925          * set width, so check that this is allowed */
1926         if (period <= np->minsync && spi_width(starget))
1927                 tp->tgoal.dt = 1;
1928
1929         tp->tgoal.period = period;
1930         tp->tgoal.check_nego = 1;
1931 }
1932
1933 static void sym2_set_width(struct scsi_target *starget, int width)
1934 {
1935         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1936         struct sym_hcb *np = sym_get_hcb(shost);
1937         struct sym_tcb *tp = &np->target[starget->id];
1938
1939         /* It is illegal to have DT set on narrow transfers.  If DT is
1940          * clear, we must also clear IU and QAS.  */
1941         if (width == 0)
1942                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1943
1944         tp->tgoal.width = width;
1945         tp->tgoal.check_nego = 1;
1946 }
1947
1948 static void sym2_set_dt(struct scsi_target *starget, int dt)
1949 {
1950         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1951         struct sym_hcb *np = sym_get_hcb(shost);
1952         struct sym_tcb *tp = &np->target[starget->id];
1953
1954         /* We must clear QAS and IU if DT is clear */
1955         if (dt)
1956                 tp->tgoal.dt = 1;
1957         else
1958                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1959         tp->tgoal.check_nego = 1;
1960 }
1961
1962 #if 0
1963 static void sym2_set_iu(struct scsi_target *starget, int iu)
1964 {
1965         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1966         struct sym_hcb *np = sym_get_hcb(shost);
1967         struct sym_tcb *tp = &np->target[starget->id];
1968
1969         if (iu)
1970                 tp->tgoal.iu = tp->tgoal.dt = 1;
1971         else
1972                 tp->tgoal.iu = 0;
1973         tp->tgoal.check_nego = 1;
1974 }
1975
1976 static void sym2_set_qas(struct scsi_target *starget, int qas)
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         if (qas)
1983                 tp->tgoal.dt = tp->tgoal.qas = 1;
1984         else
1985                 tp->tgoal.qas = 0;
1986         tp->tgoal.check_nego = 1;
1987 }
1988 #endif
1989
1990 static struct spi_function_template sym2_transport_functions = {
1991         .set_offset     = sym2_set_offset,
1992         .show_offset    = 1,
1993         .set_period     = sym2_set_period,
1994         .show_period    = 1,
1995         .set_width      = sym2_set_width,
1996         .show_width     = 1,
1997         .set_dt         = sym2_set_dt,
1998         .show_dt        = 1,
1999 #if 0
2000         .set_iu         = sym2_set_iu,
2001         .show_iu        = 1,
2002         .set_qas        = sym2_set_qas,
2003         .show_qas       = 1,
2004 #endif
2005         .get_signalling = sym2_get_signalling,
2006 };
2007
2008 static struct pci_device_id sym2_id_table[] __devinitdata = {
2009         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2010           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2011         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2012           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2013         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2014           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2015         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2016           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2017         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2018           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2019         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2020           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2021         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2022           PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL },
2023         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2024           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2025         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2026           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2027         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2028           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2029         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2030           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2031         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2032           PCI_ANY_ID, PCI_ANY_ID,  PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL }, /* new */
2033         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2034           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2035         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2036           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2037         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2038           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2039         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2040           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2041         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2042           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2043         { 0, }
2044 };
2045
2046 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2047
2048 static struct pci_error_handlers sym2_err_handler = {
2049         .error_detected = sym2_io_error_detected,
2050         .mmio_enabled   = sym2_io_slot_dump,
2051         .slot_reset     = sym2_io_slot_reset,
2052         .resume         = sym2_io_resume,
2053 };
2054
2055 static struct pci_driver sym2_driver = {
2056         .name           = NAME53C8XX,
2057         .id_table       = sym2_id_table,
2058         .probe          = sym2_probe,
2059         .remove         = __devexit_p(sym2_remove),
2060         .err_handler    = &sym2_err_handler,
2061 };
2062
2063 static int __init sym2_init(void)
2064 {
2065         int error;
2066
2067         sym2_setup_params();
2068         sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2069         if (!sym2_transport_template)
2070                 return -ENODEV;
2071
2072         error = pci_register_driver(&sym2_driver);
2073         if (error)
2074                 spi_release_transport(sym2_transport_template);
2075         return error;
2076 }
2077
2078 static void __exit sym2_exit(void)
2079 {
2080         pci_unregister_driver(&sym2_driver);
2081         spi_release_transport(sym2_transport_template);
2082 }
2083
2084 module_init(sym2_init);
2085 module_exit(sym2_exit);