err.no Git - linux-2.6/blob - 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                 int finished_reset = 0;
 613                 init_completion(&eh_done);
 614                 spin_lock_irq(shost->host_lock);
 615                 /* Make sure we didn't race */
 616                 if (pci_channel_offline(pdev)) {
 617                         BUG_ON(sym_data->io_reset);
 618                         sym_data->io_reset = &eh_done;
 619                 } else {
 620                         finished_reset = 1;
 621                 }
 622                 spin_unlock_irq(shost->host_lock);
 623                 if (!finished_reset)
 624                         finished_reset = wait_for_completion_timeout
 625                                                 (sym_data->io_reset,
 626                                                 WAIT_FOR_PCI_RECOVERY*HZ);
 627                 spin_lock_irq(shost->host_lock);
 628                 sym_data->io_reset = NULL;
 629                 spin_unlock_irq(shost->host_lock);
 630                 if (!finished_reset)
 631                         return SCSI_FAILED;
 632         }
 633
 634         spin_lock_irq(shost->host_lock);
 635         /* This one is queued in some place -> to wait for completion */
 636         FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
 637                 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
 638                 if (cp->cmd == cmd) {
 639                         cmd_queued = 1;
 640                         break;
 641                 }
 642         }
 643
 644         /* Try to proceed the operation we have been asked for */
 645         sts = -1;
 646         switch(op) {
 647         case SYM_EH_ABORT:
 648                 sts = sym_abort_scsiio(np, cmd, 1);
 649                 break;
 650         case SYM_EH_DEVICE_RESET:
 651                 sts = sym_reset_scsi_target(np, cmd->device->id);
 652                 break;
 653         case SYM_EH_BUS_RESET:
 654                 sym_reset_scsi_bus(np, 1);
 655                 sts = 0;
 656                 break;
 657         case SYM_EH_HOST_RESET:
 658                 sym_reset_scsi_bus(np, 0);
 659                 sym_start_up(shost, 1);
 660                 sts = 0;
 661                 break;
 662         default:
 663                 break;
 664         }
 665
 666         /* On error, restore everything and cross fingers :) */
 667         if (sts)
 668                 cmd_queued = 0;
 669
 670         if (cmd_queued) {
 671                 init_completion(&eh_done);
 672                 ucmd->eh_done = &eh_done;
 673                 spin_unlock_irq(shost->host_lock);
 674                 if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
 675                         ucmd->eh_done = NULL;
 676                         sts = -2;
 677                 }
 678         } else {
 679                 spin_unlock_irq(shost->host_lock);
 680         }
 681
 682         dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
 683                         sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
 684         return sts ? SCSI_FAILED : SCSI_SUCCESS;
 685 }
 686
 687
 688 /*
 689  * Error handlers called from the eh thread (one thread per HBA).
 690  */
 691 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
 692 {
 693         return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
 694 }
 695
 696 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
 697 {
 698         return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
 699 }
 700
 701 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
 702 {
 703         return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
 704 }
 705
 706 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
 707 {
 708         return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
 709 }
 710
 711 /*
 712  *  Tune device queuing depth, according to various limits.
 713  */
 714 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
 715 {
 716         struct sym_lcb *lp = sym_lp(tp, lun);
 717         u_short oldtags;
 718
 719         if (!lp)
 720                 return;
 721
 722         oldtags = lp->s.reqtags;
 723
 724         if (reqtags > lp->s.scdev_depth)
 725                 reqtags = lp->s.scdev_depth;
 726
 727         lp->s.reqtags     = reqtags;
 728
 729         if (reqtags != oldtags) {
 730                 dev_info(&tp->starget->dev,
 731                          "tagged command queuing %s, command queue depth %d.\n",
 732                           lp->s.reqtags ? "enabled" : "disabled", reqtags);
 733         }
 734 }
 735
 736 static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
 737 {
 738         struct sym_hcb *np = sym_get_hcb(sdev->host);
 739         struct sym_tcb *tp = &np->target[sdev->id];
 740         struct sym_lcb *lp;
 741
 742         if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
 743                 return -ENXIO;
 744
 745         tp->starget = sdev->sdev_target;
 746         /*
 747          * Fail the device init if the device is flagged NOSCAN at BOOT in
 748          * the NVRAM.  This may speed up boot and maintain coherency with
 749          * BIOS device numbering.  Clearing the flag allows the user to
 750          * rescan skipped devices later.  We also return an error for
 751          * devices not flagged for SCAN LUNS in the NVRAM since some single
 752          * lun devices behave badly when asked for a non zero LUN.
 753          */
 754
 755         if (tp->usrflags & SYM_SCAN_BOOT_DISABLED) {
 756                 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
 757                 starget_printk(KERN_INFO, tp->starget,
 758                                 "Scan at boot disabled in NVRAM\n");
 759                 return -ENXIO;
 760         }
 761
 762         if (tp->usrflags & SYM_SCAN_LUNS_DISABLED) {
 763                 if (sdev->lun != 0)
 764                         return -ENXIO;
 765                 starget_printk(KERN_INFO, tp->starget,
 766                                 "Multiple LUNs disabled in NVRAM\n");
 767         }
 768
 769         lp = sym_alloc_lcb(np, sdev->id, sdev->lun);
 770         if (!lp)
 771                 return -ENOMEM;
 772
 773         spi_min_period(tp->starget) = tp->usr_period;
 774         spi_max_width(tp->starget) = tp->usr_width;
 775
 776         return 0;
 777 }
 778
 779 /*
 780  * Linux entry point for device queue sizing.
 781  */
 782 static int sym53c8xx_slave_configure(struct scsi_device *sdev)
 783 {
 784         struct sym_hcb *np = sym_get_hcb(sdev->host);
 785         struct sym_tcb *tp = &np->target[sdev->id];
 786         struct sym_lcb *lp = sym_lp(tp, sdev->lun);
 787         int reqtags, depth_to_use;
 788
 789         /*
 790          *  Get user flags.
 791          */
 792         lp->curr_flags = lp->user_flags;
 793
 794         /*
 795          *  Select queue depth from driver setup.
 796          *  Donnot use more than configured by user.
 797          *  Use at least 2.
 798          *  Donnot use more than our maximum.
 799          */
 800         reqtags = sym_driver_setup.max_tag;
 801         if (reqtags > tp->usrtags)
 802                 reqtags = tp->usrtags;
 803         if (!sdev->tagged_supported)
 804                 reqtags = 0;
 805         if (reqtags > SYM_CONF_MAX_TAG)
 806                 reqtags = SYM_CONF_MAX_TAG;
 807         depth_to_use = reqtags ? reqtags : 2;
 808         scsi_adjust_queue_depth(sdev,
 809                                 sdev->tagged_supported ? MSG_SIMPLE_TAG : 0,
 810                                 depth_to_use);
 811         lp->s.scdev_depth = depth_to_use;
 812         sym_tune_dev_queuing(tp, sdev->lun, reqtags);
 813
 814         if (!spi_initial_dv(sdev->sdev_target))
 815                 spi_dv_device(sdev);
 816
 817         return 0;
 818 }
 819
 820 static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
 821 {
 822         struct sym_hcb *np = sym_get_hcb(sdev->host);
 823         struct sym_lcb *lp = sym_lp(&np->target[sdev->id], sdev->lun);
 824
 825         if (lp->itlq_tbl)
 826                 sym_mfree_dma(lp->itlq_tbl, SYM_CONF_MAX_TASK * 4, "ITLQ_TBL");
 827         kfree(lp->cb_tags);
 828         sym_mfree_dma(lp, sizeof(*lp), "LCB");
 829 }
 830
 831 /*
 832  *  Linux entry point for info() function
 833  */
 834 static const char *sym53c8xx_info (struct Scsi_Host *host)
 835 {
 836         return SYM_DRIVER_NAME;
 837 }
 838
 839
 840 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
 841 /*
 842  *  Proc file system stuff
 843  *
 844  *  A read operation returns adapter information.
 845  *  A write operation is a control command.
 846  *  The string is parsed in the driver code and the command is passed
 847  *  to the sym_usercmd() function.
 848  */
 849
 850 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
 851
 852 struct  sym_usrcmd {
 853         u_long  target;
 854         u_long  lun;
 855         u_long  data;
 856         u_long  cmd;
 857 };
 858
 859 #define UC_SETSYNC      10
 860 #define UC_SETTAGS      11
 861 #define UC_SETDEBUG     12
 862 #define UC_SETWIDE      14
 863 #define UC_SETFLAG      15
 864 #define UC_SETVERBOSE   17
 865 #define UC_RESETDEV     18
 866 #define UC_CLEARDEV     19
 867
 868 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
 869 {
 870         struct sym_tcb *tp;
 871         int t, l;
 872
 873         switch (uc->cmd) {
 874         case 0: return;
 875
 876 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
 877         case UC_SETDEBUG:
 878                 sym_debug_flags = uc->data;
 879                 break;
 880 #endif
 881         case UC_SETVERBOSE:
 882                 np->verbose = uc->data;
 883                 break;
 884         default:
 885                 /*
 886                  * We assume that other commands apply to targets.
 887                  * This should always be the case and avoid the below
 888                  * 4 lines to be repeated 6 times.
 889                  */
 890                 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
 891                         if (!((uc->target >> t) & 1))
 892                                 continue;
 893                         tp = &np->target[t];
 894
 895                         switch (uc->cmd) {
 896
 897                         case UC_SETSYNC:
 898                                 if (!uc->data || uc->data >= 255) {
 899                                         tp->tgoal.iu = tp->tgoal.dt =
 900                                                 tp->tgoal.qas = 0;
 901                                         tp->tgoal.offset = 0;
 902                                 } else if (uc->data <= 9 && np->minsync_dt) {
 903                                         if (uc->data < np->minsync_dt)
 904                                                 uc->data = np->minsync_dt;
 905                                         tp->tgoal.iu = tp->tgoal.dt =
 906                                                 tp->tgoal.qas = 1;
 907                                         tp->tgoal.width = 1;
 908                                         tp->tgoal.period = uc->data;
 909                                         tp->tgoal.offset = np->maxoffs_dt;
 910                                 } else {
 911                                         if (uc->data < np->minsync)
 912                                                 uc->data = np->minsync;
 913                                         tp->tgoal.iu = tp->tgoal.dt =
 914                                                 tp->tgoal.qas = 0;
 915                                         tp->tgoal.period = uc->data;
 916                                         tp->tgoal.offset = np->maxoffs;
 917                                 }
 918                                 tp->tgoal.check_nego = 1;
 919                                 break;
 920                         case UC_SETWIDE:
 921                                 tp->tgoal.width = uc->data ? 1 : 0;
 922                                 tp->tgoal.check_nego = 1;
 923                                 break;
 924                         case UC_SETTAGS:
 925                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
 926                                         sym_tune_dev_queuing(tp, l, uc->data);
 927                                 break;
 928                         case UC_RESETDEV:
 929                                 tp->to_reset = 1;
 930                                 np->istat_sem = SEM;
 931                                 OUTB(np, nc_istat, SIGP|SEM);
 932                                 break;
 933                         case UC_CLEARDEV:
 934                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
 935                                         struct sym_lcb *lp = sym_lp(tp, l);
 936                                         if (lp) lp->to_clear = 1;
 937                                 }
 938                                 np->istat_sem = SEM;
 939                                 OUTB(np, nc_istat, SIGP|SEM);
 940                                 break;
 941                         case UC_SETFLAG:
 942                                 tp->usrflags = uc->data;
 943                                 break;
 944                         }
 945                 }
 946                 break;
 947         }
 948 }
 949
 950 static int skip_spaces(char *ptr, int len)
 951 {
 952         int cnt, c;
 953
 954         for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
 955
 956         return (len - cnt);
 957 }
 958
 959 static int get_int_arg(char *ptr, int len, u_long *pv)
 960 {
 961         char *end;
 962
 963         *pv = simple_strtoul(ptr, &end, 10);
 964         return (end - ptr);
 965 }
 966
 967 static int is_keyword(char *ptr, int len, char *verb)
 968 {
 969         int verb_len = strlen(verb);
 970
 971         if (len >= verb_len && !memcmp(verb, ptr, verb_len))
 972                 return verb_len;
 973         else
 974                 return 0;
 975 }
 976
 977 #define SKIP_SPACES(ptr, len)                                           \
 978         if ((arg_len = skip_spaces(ptr, len)) < 1)                      \
 979                 return -EINVAL;                                         \
 980         ptr += arg_len; len -= arg_len;
 981
 982 #define GET_INT_ARG(ptr, len, v)                                        \
 983         if (!(arg_len = get_int_arg(ptr, len, &(v))))                   \
 984                 return -EINVAL;                                         \
 985         ptr += arg_len; len -= arg_len;
 986
 987
 988 /*
 989  * Parse a control command
 990  */
 991
 992 static int sym_user_command(struct Scsi_Host *shost, char *buffer, int length)
 993 {
 994         struct sym_hcb *np = sym_get_hcb(shost);
 995         char *ptr       = buffer;
 996         int len         = length;
 997         struct sym_usrcmd cmd, *uc = &cmd;
 998         int             arg_len;
 999         u_long          target;
1000
1001         memset(uc, 0, sizeof(*uc));
1002
1003         if (len > 0 && ptr[len-1] == '\n')
1004                 --len;
1005
1006         if      ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1007                 uc->cmd = UC_SETSYNC;
1008         else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1009                 uc->cmd = UC_SETTAGS;
1010         else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1011                 uc->cmd = UC_SETVERBOSE;
1012         else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1013                 uc->cmd = UC_SETWIDE;
1014 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1015         else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1016                 uc->cmd = UC_SETDEBUG;
1017 #endif
1018         else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1019                 uc->cmd = UC_SETFLAG;
1020         else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1021                 uc->cmd = UC_RESETDEV;
1022         else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1023                 uc->cmd = UC_CLEARDEV;
1024         else
1025                 arg_len = 0;
1026
1027 #ifdef DEBUG_PROC_INFO
1028 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1029 #endif
1030
1031         if (!arg_len)
1032                 return -EINVAL;
1033         ptr += arg_len; len -= arg_len;
1034
1035         switch(uc->cmd) {
1036         case UC_SETSYNC:
1037         case UC_SETTAGS:
1038         case UC_SETWIDE:
1039         case UC_SETFLAG:
1040         case UC_RESETDEV:
1041         case UC_CLEARDEV:
1042                 SKIP_SPACES(ptr, len);
1043                 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1044                         ptr += arg_len; len -= arg_len;
1045                         uc->target = ~0;
1046                 } else {
1047                         GET_INT_ARG(ptr, len, target);
1048                         uc->target = (1<<target);
1049 #ifdef DEBUG_PROC_INFO
1050 printk("sym_user_command: target=%ld\n", target);
1051 #endif
1052                 }
1053                 break;
1054         }
1055
1056         switch(uc->cmd) {
1057         case UC_SETVERBOSE:
1058         case UC_SETSYNC:
1059         case UC_SETTAGS:
1060         case UC_SETWIDE:
1061                 SKIP_SPACES(ptr, len);
1062                 GET_INT_ARG(ptr, len, uc->data);
1063 #ifdef DEBUG_PROC_INFO
1064 printk("sym_user_command: data=%ld\n", uc->data);
1065 #endif
1066                 break;
1067 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1068         case UC_SETDEBUG:
1069                 while (len > 0) {
1070                         SKIP_SPACES(ptr, len);
1071                         if      ((arg_len = is_keyword(ptr, len, "alloc")))
1072                                 uc->data |= DEBUG_ALLOC;
1073                         else if ((arg_len = is_keyword(ptr, len, "phase")))
1074                                 uc->data |= DEBUG_PHASE;
1075                         else if ((arg_len = is_keyword(ptr, len, "queue")))
1076                                 uc->data |= DEBUG_QUEUE;
1077                         else if ((arg_len = is_keyword(ptr, len, "result")))
1078                                 uc->data |= DEBUG_RESULT;
1079                         else if ((arg_len = is_keyword(ptr, len, "scatter")))
1080                                 uc->data |= DEBUG_SCATTER;
1081                         else if ((arg_len = is_keyword(ptr, len, "script")))
1082                                 uc->data |= DEBUG_SCRIPT;
1083                         else if ((arg_len = is_keyword(ptr, len, "tiny")))
1084                                 uc->data |= DEBUG_TINY;
1085                         else if ((arg_len = is_keyword(ptr, len, "timing")))
1086                                 uc->data |= DEBUG_TIMING;
1087                         else if ((arg_len = is_keyword(ptr, len, "nego")))
1088                                 uc->data |= DEBUG_NEGO;
1089                         else if ((arg_len = is_keyword(ptr, len, "tags")))
1090                                 uc->data |= DEBUG_TAGS;
1091                         else if ((arg_len = is_keyword(ptr, len, "pointer")))
1092                                 uc->data |= DEBUG_POINTER;
1093                         else
1094                                 return -EINVAL;
1095                         ptr += arg_len; len -= arg_len;
1096                 }
1097 #ifdef DEBUG_PROC_INFO
1098 printk("sym_user_command: data=%ld\n", uc->data);
1099 #endif
1100                 break;
1101 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1102         case UC_SETFLAG:
1103                 while (len > 0) {
1104                         SKIP_SPACES(ptr, len);
1105                         if      ((arg_len = is_keyword(ptr, len, "no_disc")))
1106                                 uc->data &= ~SYM_DISC_ENABLED;
1107                         else
1108                                 return -EINVAL;
1109                         ptr += arg_len; len -= arg_len;
1110                 }
1111                 break;
1112         default:
1113                 break;
1114         }
1115
1116         if (len)
1117                 return -EINVAL;
1118         else {
1119                 unsigned long flags;
1120
1121                 spin_lock_irqsave(shost->host_lock, flags);
1122                 sym_exec_user_command(np, uc);
1123                 spin_unlock_irqrestore(shost->host_lock, flags);
1124         }
1125         return length;
1126 }
1127
1128 #endif  /* SYM_LINUX_USER_COMMAND_SUPPORT */
1129
1130
1131 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1132 /*
1133  *  Informations through the proc file system.
1134  */
1135 struct info_str {
1136         char *buffer;
1137         int length;
1138         int offset;
1139         int pos;
1140 };
1141
1142 static void copy_mem_info(struct info_str *info, char *data, int len)
1143 {
1144         if (info->pos + len > info->length)
1145                 len = info->length - info->pos;
1146
1147         if (info->pos + len < info->offset) {
1148                 info->pos += len;
1149                 return;
1150         }
1151         if (info->pos < info->offset) {
1152                 data += (info->offset - info->pos);
1153                 len  -= (info->offset - info->pos);
1154         }
1155
1156         if (len > 0) {
1157                 memcpy(info->buffer + info->pos, data, len);
1158                 info->pos += len;
1159         }
1160 }
1161
1162 static int copy_info(struct info_str *info, char *fmt, ...)
1163 {
1164         va_list args;
1165         char buf[81];
1166         int len;
1167
1168         va_start(args, fmt);
1169         len = vsprintf(buf, fmt, args);
1170         va_end(args);
1171
1172         copy_mem_info(info, buf, len);
1173         return len;
1174 }
1175
1176 /*
1177  *  Copy formatted information into the input buffer.
1178  */
1179 static int sym_host_info(struct Scsi_Host *shost, char *ptr, off_t offset, int len)
1180 {
1181         struct sym_data *sym_data = shost_priv(shost);
1182         struct pci_dev *pdev = sym_data->pdev;
1183         struct sym_hcb *np = sym_data->ncb;
1184         struct info_str info;
1185
1186         info.buffer     = ptr;
1187         info.length     = len;
1188         info.offset     = offset;
1189         info.pos        = 0;
1190
1191         copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1192                          "revision id 0x%x\n", np->s.chip_name,
1193                          pdev->device, pdev->revision);
1194         copy_info(&info, "At PCI address %s, IRQ %u\n",
1195                          pci_name(pdev), pdev->irq);
1196         copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1197                          (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1198                          np->maxwide ? "Wide" : "Narrow",
1199                          np->minsync_dt ? ", DT capable" : "");
1200
1201         copy_info(&info, "Max. started commands %d, "
1202                          "max. commands per LUN %d\n",
1203                          SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1204
1205         return info.pos > info.offset? info.pos - info.offset : 0;
1206 }
1207 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1208
1209 /*
1210  *  Entry point of the scsi proc fs of the driver.
1211  *  - func = 0 means read  (returns adapter infos)
1212  *  - func = 1 means write (not yet merget from sym53c8xx)
1213  */
1214 static int sym53c8xx_proc_info(struct Scsi_Host *shost, char *buffer,
1215                         char **start, off_t offset, int length, int func)
1216 {
1217         int retv;
1218
1219         if (func) {
1220 #ifdef  SYM_LINUX_USER_COMMAND_SUPPORT
1221                 retv = sym_user_command(shost, buffer, length);
1222 #else
1223                 retv = -EINVAL;
1224 #endif
1225         } else {
1226                 if (start)
1227                         *start = buffer;
1228 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1229                 retv = sym_host_info(shost, buffer, offset, length);
1230 #else
1231                 retv = -EINVAL;
1232 #endif
1233         }
1234
1235         return retv;
1236 }
1237 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1238
1239 /*
1240  *      Free controller resources.
1241  */
1242 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev)
1243 {
1244         /*
1245          *  Free O/S specific resources.
1246          */
1247         if (pdev->irq)
1248                 free_irq(pdev->irq, np->s.host);
1249         if (np->s.ioaddr)
1250                 pci_iounmap(pdev, np->s.ioaddr);
1251         if (np->s.ramaddr)
1252                 pci_iounmap(pdev, np->s.ramaddr);
1253         /*
1254          *  Free O/S independent resources.
1255          */
1256         sym_hcb_free(np);
1257
1258         sym_mfree_dma(np, sizeof(*np), "HCB");
1259 }
1260
1261 /*
1262  *  Host attach and initialisations.
1263  *
1264  *  Allocate host data and ncb structure.
1265  *  Remap MMIO region.
1266  *  Do chip initialization.
1267  *  If all is OK, install interrupt handling and
1268  *  start the timer daemon.
1269  */
1270 static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1271                 int unit, struct sym_device *dev)
1272 {
1273         struct sym_data *sym_data;
1274         struct sym_hcb *np = NULL;
1275         struct Scsi_Host *shost;
1276         struct pci_dev *pdev = dev->pdev;
1277         unsigned long flags;
1278         struct sym_fw *fw;
1279
1280         printk(KERN_INFO "sym%d: <%s> rev 0x%x at pci %s irq %u\n",
1281                 unit, dev->chip.name, pdev->revision, pci_name(pdev),
1282                 pdev->irq);
1283
1284         /*
1285          *  Get the firmware for this chip.
1286          */
1287         fw = sym_find_firmware(&dev->chip);
1288         if (!fw)
1289                 return NULL;
1290
1291         shost = scsi_host_alloc(tpnt, sizeof(*sym_data));
1292         if (!shost)
1293                 return NULL;
1294         sym_data = shost_priv(shost);
1295
1296         /*
1297          *  Allocate immediately the host control block,
1298          *  since we are only expecting to succeed. :)
1299          *  We keep track in the HCB of all the resources that
1300          *  are to be released on error.
1301          */
1302         np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1303         if (!np)
1304                 goto attach_failed;
1305         np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1306         sym_data->ncb = np;
1307         sym_data->pdev = pdev;
1308         np->s.host = shost;
1309
1310         pci_set_drvdata(pdev, shost);
1311
1312         /*
1313          *  Copy some useful infos to the HCB.
1314          */
1315         np->hcb_ba      = vtobus(np);
1316         np->verbose     = sym_driver_setup.verbose;
1317         np->s.unit      = unit;
1318         np->features    = dev->chip.features;
1319         np->clock_divn  = dev->chip.nr_divisor;
1320         np->maxoffs     = dev->chip.offset_max;
1321         np->maxburst    = dev->chip.burst_max;
1322         np->myaddr      = dev->host_id;
1323
1324         /*
1325          *  Edit its name.
1326          */
1327         strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1328         sprintf(np->s.inst_name, "sym%d", np->s.unit);
1329
1330         if ((SYM_CONF_DMA_ADDRESSING_MODE > 0) && (np->features & FE_DAC) &&
1331                         !pci_set_dma_mask(pdev, DMA_DAC_MASK)) {
1332                 set_dac(np);
1333         } else if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
1334                 printf_warning("%s: No suitable DMA available\n", sym_name(np));
1335                 goto attach_failed;
1336         }
1337
1338         /*
1339          *  Try to map the controller chip to
1340          *  virtual and physical memory.
1341          */
1342         np->mmio_ba = (u32)dev->mmio_base;
1343         np->s.ioaddr    = dev->s.ioaddr;
1344         np->s.ramaddr   = dev->s.ramaddr;
1345
1346         /*
1347          *  Map on-chip RAM if present and supported.
1348          */
1349         if (!(np->features & FE_RAM))
1350                 dev->ram_base = 0;
1351         if (dev->ram_base)
1352                 np->ram_ba = (u32)dev->ram_base;
1353
1354         if (sym_hcb_attach(shost, fw, dev->nvram))
1355                 goto attach_failed;
1356
1357         /*
1358          *  Install the interrupt handler.
1359          *  If we synchonize the C code with SCRIPTS on interrupt,
1360          *  we do not want to share the INTR line at all.
1361          */
1362         if (request_irq(pdev->irq, sym53c8xx_intr, IRQF_SHARED, NAME53C8XX,
1363                         shost)) {
1364                 printf_err("%s: request irq %u failure\n",
1365                         sym_name(np), pdev->irq);
1366                 goto attach_failed;
1367         }
1368
1369         /*
1370          *  After SCSI devices have been opened, we cannot
1371          *  reset the bus safely, so we do it here.
1372          */
1373         spin_lock_irqsave(shost->host_lock, flags);
1374         if (sym_reset_scsi_bus(np, 0))
1375                 goto reset_failed;
1376
1377         /*
1378          *  Start the SCRIPTS.
1379          */
1380         sym_start_up(shost, 1);
1381
1382         /*
1383          *  Start the timer daemon
1384          */
1385         init_timer(&np->s.timer);
1386         np->s.timer.data     = (unsigned long) np;
1387         np->s.timer.function = sym53c8xx_timer;
1388         np->s.lasttime=0;
1389         sym_timer (np);
1390
1391         /*
1392          *  Fill Linux host instance structure
1393          *  and return success.
1394          */
1395         shost->max_channel      = 0;
1396         shost->this_id          = np->myaddr;
1397         shost->max_id           = np->maxwide ? 16 : 8;
1398         shost->max_lun          = SYM_CONF_MAX_LUN;
1399         shost->unique_id        = pci_resource_start(pdev, 0);
1400         shost->cmd_per_lun      = SYM_CONF_MAX_TAG;
1401         shost->can_queue        = (SYM_CONF_MAX_START-2);
1402         shost->sg_tablesize     = SYM_CONF_MAX_SG;
1403         shost->max_cmd_len      = 16;
1404         BUG_ON(sym2_transport_template == NULL);
1405         shost->transportt       = sym2_transport_template;
1406
1407         /* 53c896 rev 1 errata: DMA may not cross 16MB boundary */
1408         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 2)
1409                 shost->dma_boundary = 0xFFFFFF;
1410
1411         spin_unlock_irqrestore(shost->host_lock, flags);
1412
1413         return shost;
1414
1415  reset_failed:
1416         printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1417                    "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1418         spin_unlock_irqrestore(shost->host_lock, flags);
1419  attach_failed:
1420         if (!shost)
1421                 return NULL;
1422         printf_info("%s: giving up ...\n", sym_name(np));
1423         if (np)
1424                 sym_free_resources(np, pdev);
1425         scsi_host_put(shost);
1426
1427         return NULL;
1428  }
1429
1430
1431 /*
1432  *    Detect and try to read SYMBIOS and TEKRAM NVRAM.
1433  */
1434 #if SYM_CONF_NVRAM_SUPPORT
1435 static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1436 {
1437         devp->nvram = nvp;
1438         nvp->type = 0;
1439
1440         sym_read_nvram(devp, nvp);
1441 }
1442 #else
1443 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1444 {
1445 }
1446 #endif  /* SYM_CONF_NVRAM_SUPPORT */
1447
1448 static int __devinit sym_check_supported(struct sym_device *device)
1449 {
1450         struct sym_chip *chip;
1451         struct pci_dev *pdev = device->pdev;
1452         unsigned long io_port = pci_resource_start(pdev, 0);
1453         int i;
1454
1455         /*
1456          *  If user excluded this chip, do not initialize it.
1457          *  I hate this code so much.  Must kill it.
1458          */
1459         if (io_port) {
1460                 for (i = 0 ; i < 8 ; i++) {
1461                         if (sym_driver_setup.excludes[i] == io_port)
1462                                 return -ENODEV;
1463                 }
1464         }
1465
1466         /*
1467          * Check if the chip is supported.  Then copy the chip description
1468          * to our device structure so we can make it match the actual device
1469          * and options.
1470          */
1471         chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1472         if (!chip) {
1473                 dev_info(&pdev->dev, "device not supported\n");
1474                 return -ENODEV;
1475         }
1476         memcpy(&device->chip, chip, sizeof(device->chip));
1477
1478         return 0;
1479 }
1480
1481 /*
1482  * Ignore Symbios chips controlled by various RAID controllers.
1483  * These controllers set value 0x52414944 at RAM end - 16.
1484  */
1485 static int __devinit sym_check_raid(struct sym_device *device)
1486 {
1487         unsigned int ram_size, ram_val;
1488
1489         if (!device->s.ramaddr)
1490                 return 0;
1491
1492         if (device->chip.features & FE_RAM8K)
1493                 ram_size = 8192;
1494         else
1495                 ram_size = 4096;
1496
1497         ram_val = readl(device->s.ramaddr + ram_size - 16);
1498         if (ram_val != 0x52414944)
1499                 return 0;
1500
1501         dev_info(&device->pdev->dev,
1502                         "not initializing, driven by RAID controller.\n");
1503         return -ENODEV;
1504 }
1505
1506 static int __devinit sym_set_workarounds(struct sym_device *device)
1507 {
1508         struct sym_chip *chip = &device->chip;
1509         struct pci_dev *pdev = device->pdev;
1510         u_short status_reg;
1511
1512         /*
1513          *  (ITEM 12 of a DEL about the 896 I haven't yet).
1514          *  We must ensure the chip will use WRITE AND INVALIDATE.
1515          *  The revision number limit is for now arbitrary.
1516          */
1517         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 0x4) {
1518                 chip->features  |= (FE_WRIE | FE_CLSE);
1519         }
1520
1521         /* If the chip can do Memory Write Invalidate, enable it */
1522         if (chip->features & FE_WRIE) {
1523                 if (pci_set_mwi(pdev))
1524                         return -ENODEV;
1525         }
1526
1527         /*
1528          *  Work around for errant bit in 895A. The 66Mhz
1529          *  capable bit is set erroneously. Clear this bit.
1530          *  (Item 1 DEL 533)
1531          *
1532          *  Make sure Config space and Features agree.
1533          *
1534          *  Recall: writes are not normal to status register -
1535          *  write a 1 to clear and a 0 to leave unchanged.
1536          *  Can only reset bits.
1537          */
1538         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1539         if (chip->features & FE_66MHZ) {
1540                 if (!(status_reg & PCI_STATUS_66MHZ))
1541                         chip->features &= ~FE_66MHZ;
1542         } else {
1543                 if (status_reg & PCI_STATUS_66MHZ) {
1544                         status_reg = PCI_STATUS_66MHZ;
1545                         pci_write_config_word(pdev, PCI_STATUS, status_reg);
1546                         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1547                 }
1548         }
1549
1550         return 0;
1551 }
1552
1553 /*
1554  *  Read and check the PCI configuration for any detected NCR
1555  *  boards and save data for attaching after all boards have
1556  *  been detected.
1557  */
1558 static void __devinit
1559 sym_init_device(struct pci_dev *pdev, struct sym_device *device)
1560 {
1561         int i = 2;
1562         struct pci_bus_region bus_addr;
1563
1564         device->host_id = SYM_SETUP_HOST_ID;
1565         device->pdev = pdev;
1566
1567         pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[1]);
1568         device->mmio_base = bus_addr.start;
1569
1570         /*
1571          * If the BAR is 64-bit, resource 2 will be occupied by the
1572          * upper 32 bits
1573          */
1574         if (!pdev->resource[i].flags)
1575                 i++;
1576         pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[i]);
1577         device->ram_base = bus_addr.start;
1578
1579 #ifdef CONFIG_SCSI_SYM53C8XX_MMIO
1580         if (device->mmio_base)
1581                 device->s.ioaddr = pci_iomap(pdev, 1,
1582                                                 pci_resource_len(pdev, 1));
1583 #endif
1584         if (!device->s.ioaddr)
1585                 device->s.ioaddr = pci_iomap(pdev, 0,
1586                                                 pci_resource_len(pdev, 0));
1587         if (device->ram_base)
1588                 device->s.ramaddr = pci_iomap(pdev, i,
1589                                                 pci_resource_len(pdev, i));
1590 }
1591
1592 /*
1593  * The NCR PQS and PDS cards are constructed as a DEC bridge
1594  * behind which sits a proprietary NCR memory controller and
1595  * either four or two 53c875s as separate devices.  We can tell
1596  * if an 875 is part of a PQS/PDS or not since if it is, it will
1597  * be on the same bus as the memory controller.  In its usual
1598  * mode of operation, the 875s are slaved to the memory
1599  * controller for all transfers.  To operate with the Linux
1600  * driver, the memory controller is disabled and the 875s
1601  * freed to function independently.  The only wrinkle is that
1602  * the preset SCSI ID (which may be zero) must be read in from
1603  * a special configuration space register of the 875.
1604  */
1605 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1606 {
1607         int slot;
1608         u8 tmp;
1609
1610         for (slot = 0; slot < 256; slot++) {
1611                 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1612
1613                 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1614                         pci_dev_put(memc);
1615                         continue;
1616                 }
1617
1618                 /* bit 1: allow individual 875 configuration */
1619                 pci_read_config_byte(memc, 0x44, &tmp);
1620                 if ((tmp & 0x2) == 0) {
1621                         tmp |= 0x2;
1622                         pci_write_config_byte(memc, 0x44, tmp);
1623                 }
1624
1625                 /* bit 2: drive individual 875 interrupts to the bus */
1626                 pci_read_config_byte(memc, 0x45, &tmp);
1627                 if ((tmp & 0x4) == 0) {
1628                         tmp |= 0x4;
1629                         pci_write_config_byte(memc, 0x45, tmp);
1630                 }
1631
1632                 pci_dev_put(memc);
1633                 break;
1634         }
1635
1636         pci_read_config_byte(pdev, 0x84, &tmp);
1637         sym_dev->host_id = tmp;
1638 }
1639
1640 /*
1641  *  Called before unloading the module.
1642  *  Detach the host.
1643  *  We have to free resources and halt the NCR chip.
1644  */
1645 static int sym_detach(struct Scsi_Host *shost, struct pci_dev *pdev)
1646 {
1647         struct sym_hcb *np = sym_get_hcb(shost);
1648         printk("%s: detaching ...\n", sym_name(np));
1649
1650         del_timer_sync(&np->s.timer);
1651
1652         /*
1653          * Reset NCR chip.
1654          * We should use sym_soft_reset(), but we don't want to do
1655          * so, since we may not be safe if interrupts occur.
1656          */
1657         printk("%s: resetting chip\n", sym_name(np));
1658         OUTB(np, nc_istat, SRST);
1659         INB(np, nc_mbox1);
1660         udelay(10);
1661         OUTB(np, nc_istat, 0);
1662
1663         sym_free_resources(np, pdev);
1664
1665         return 1;
1666 }
1667
1668 /*
1669  * Driver host template.
1670  */
1671 static struct scsi_host_template sym2_template = {
1672         .module                 = THIS_MODULE,
1673         .name                   = "sym53c8xx",
1674         .info                   = sym53c8xx_info,
1675         .queuecommand           = sym53c8xx_queue_command,
1676         .slave_alloc            = sym53c8xx_slave_alloc,
1677         .slave_configure        = sym53c8xx_slave_configure,
1678         .slave_destroy          = sym53c8xx_slave_destroy,
1679         .eh_abort_handler       = sym53c8xx_eh_abort_handler,
1680         .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1681         .eh_bus_reset_handler   = sym53c8xx_eh_bus_reset_handler,
1682         .eh_host_reset_handler  = sym53c8xx_eh_host_reset_handler,
1683         .this_id                = 7,
1684         .use_clustering         = ENABLE_CLUSTERING,
1685         .use_sg_chaining        = ENABLE_SG_CHAINING,
1686         .max_sectors            = 0xFFFF,
1687 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1688         .proc_info              = sym53c8xx_proc_info,
1689         .proc_name              = NAME53C8XX,
1690 #endif
1691 };
1692
1693 static int attach_count;
1694
1695 static int __devinit sym2_probe(struct pci_dev *pdev,
1696                                 const struct pci_device_id *ent)
1697 {
1698         struct sym_device sym_dev;
1699         struct sym_nvram nvram;
1700         struct Scsi_Host *shost;
1701
1702         memset(&sym_dev, 0, sizeof(sym_dev));
1703         memset(&nvram, 0, sizeof(nvram));
1704
1705         if (pci_enable_device(pdev))
1706                 goto leave;
1707
1708         pci_set_master(pdev);
1709
1710         if (pci_request_regions(pdev, NAME53C8XX))
1711                 goto disable;
1712
1713         sym_init_device(pdev, &sym_dev);
1714         if (sym_check_supported(&sym_dev))
1715                 goto free;
1716
1717         if (sym_check_raid(&sym_dev))
1718                 goto leave;     /* Don't disable the device */
1719
1720         if (sym_set_workarounds(&sym_dev))
1721                 goto free;
1722
1723         sym_config_pqs(pdev, &sym_dev);
1724
1725         sym_get_nvram(&sym_dev, &nvram);
1726
1727         shost = sym_attach(&sym2_template, attach_count, &sym_dev);
1728         if (!shost)
1729                 goto free;
1730
1731         if (scsi_add_host(shost, &pdev->dev))
1732                 goto detach;
1733         scsi_scan_host(shost);
1734
1735         attach_count++;
1736
1737         return 0;
1738
1739  detach:
1740         sym_detach(pci_get_drvdata(pdev), pdev);
1741  free:
1742         pci_release_regions(pdev);
1743  disable:
1744         pci_disable_device(pdev);
1745  leave:
1746         return -ENODEV;
1747 }
1748
1749 static void sym2_remove(struct pci_dev *pdev)
1750 {
1751         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1752
1753         scsi_remove_host(shost);
1754         scsi_host_put(shost);
1755         sym_detach(shost, pdev);
1756         pci_release_regions(pdev);
1757         pci_disable_device(pdev);
1758
1759         attach_count--;
1760 }
1761
1762 /**
1763  * sym2_io_error_detected() - called when PCI error is detected
1764  * @pdev: pointer to PCI device
1765  * @state: current state of the PCI slot
1766  */
1767 static pci_ers_result_t sym2_io_error_detected(struct pci_dev *pdev,
1768                                          enum pci_channel_state state)
1769 {
1770         /* If slot is permanently frozen, turn everything off */
1771         if (state == pci_channel_io_perm_failure) {
1772                 sym2_remove(pdev);
1773                 return PCI_ERS_RESULT_DISCONNECT;
1774         }
1775
1776         disable_irq(pdev->irq);
1777         pci_disable_device(pdev);
1778
1779         /* Request that MMIO be enabled, so register dump can be taken. */
1780         return PCI_ERS_RESULT_CAN_RECOVER;
1781 }
1782
1783 /**
1784  * sym2_io_slot_dump - Enable MMIO and dump debug registers
1785  * @pdev: pointer to PCI device
1786  */
1787 static pci_ers_result_t sym2_io_slot_dump(struct pci_dev *pdev)
1788 {
1789         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1790
1791         sym_dump_registers(shost);
1792
1793         /* Request a slot reset. */
1794         return PCI_ERS_RESULT_NEED_RESET;
1795 }
1796
1797 /**
1798  * sym2_reset_workarounds - hardware-specific work-arounds
1799  *
1800  * This routine is similar to sym_set_workarounds(), except
1801  * that, at this point, we already know that the device was
1802  * succesfully intialized at least once before, and so most
1803  * of the steps taken there are un-needed here.
1804  */
1805 static void sym2_reset_workarounds(struct pci_dev *pdev)
1806 {
1807         u_short status_reg;
1808         struct sym_chip *chip;
1809
1810         chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1811
1812         /* Work around for errant bit in 895A, in a fashion
1813          * similar to what is done in sym_set_workarounds().
1814          */
1815         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1816         if (!(chip->features & FE_66MHZ) && (status_reg & PCI_STATUS_66MHZ)) {
1817                 status_reg = PCI_STATUS_66MHZ;
1818                 pci_write_config_word(pdev, PCI_STATUS, status_reg);
1819                 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1820         }
1821 }
1822
1823 /**
1824  * sym2_io_slot_reset() - called when the pci bus has been reset.
1825  * @pdev: pointer to PCI device
1826  *
1827  * Restart the card from scratch.
1828  */
1829 static pci_ers_result_t sym2_io_slot_reset(struct pci_dev *pdev)
1830 {
1831         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1832         struct sym_hcb *np = sym_get_hcb(shost);
1833
1834         printk(KERN_INFO "%s: recovering from a PCI slot reset\n",
1835                   sym_name(np));
1836
1837         if (pci_enable_device(pdev)) {
1838                 printk(KERN_ERR "%s: Unable to enable after PCI reset\n",
1839                         sym_name(np));
1840                 return PCI_ERS_RESULT_DISCONNECT;
1841         }
1842
1843         pci_set_master(pdev);
1844         enable_irq(pdev->irq);
1845
1846         /* If the chip can do Memory Write Invalidate, enable it */
1847         if (np->features & FE_WRIE) {
1848                 if (pci_set_mwi(pdev))
1849                         return PCI_ERS_RESULT_DISCONNECT;
1850         }
1851
1852         /* Perform work-arounds, analogous to sym_set_workarounds() */
1853         sym2_reset_workarounds(pdev);
1854
1855         /* Perform host reset only on one instance of the card */
1856         if (PCI_FUNC(pdev->devfn) == 0) {
1857                 if (sym_reset_scsi_bus(np, 0)) {
1858                         printk(KERN_ERR "%s: Unable to reset scsi host\n",
1859                                 sym_name(np));
1860                         return PCI_ERS_RESULT_DISCONNECT;
1861                 }
1862                 sym_start_up(shost, 1);
1863         }
1864
1865         return PCI_ERS_RESULT_RECOVERED;
1866 }
1867
1868 /**
1869  * sym2_io_resume() - resume normal ops after PCI reset
1870  * @pdev: pointer to PCI device
1871  *
1872  * Called when the error recovery driver tells us that its
1873  * OK to resume normal operation. Use completion to allow
1874  * halted scsi ops to resume.
1875  */
1876 static void sym2_io_resume(struct pci_dev *pdev)
1877 {
1878         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1879         struct sym_data *sym_data = shost_priv(shost);
1880
1881         spin_lock_irq(shost->host_lock);
1882         if (sym_data->io_reset)
1883                 complete_all(sym_data->io_reset);
1884         spin_unlock_irq(shost->host_lock);
1885 }
1886
1887 static void sym2_get_signalling(struct Scsi_Host *shost)
1888 {
1889         struct sym_hcb *np = sym_get_hcb(shost);
1890         enum spi_signal_type type;
1891
1892         switch (np->scsi_mode) {
1893         case SMODE_SE:
1894                 type = SPI_SIGNAL_SE;
1895                 break;
1896         case SMODE_LVD:
1897                 type = SPI_SIGNAL_LVD;
1898                 break;
1899         case SMODE_HVD:
1900                 type = SPI_SIGNAL_HVD;
1901                 break;
1902         default:
1903                 type = SPI_SIGNAL_UNKNOWN;
1904                 break;
1905         }
1906         spi_signalling(shost) = type;
1907 }
1908
1909 static void sym2_set_offset(struct scsi_target *starget, int offset)
1910 {
1911         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1912         struct sym_hcb *np = sym_get_hcb(shost);
1913         struct sym_tcb *tp = &np->target[starget->id];
1914
1915         tp->tgoal.offset = offset;
1916         tp->tgoal.check_nego = 1;
1917 }
1918
1919 static void sym2_set_period(struct scsi_target *starget, int period)
1920 {
1921         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1922         struct sym_hcb *np = sym_get_hcb(shost);
1923         struct sym_tcb *tp = &np->target[starget->id];
1924
1925         /* have to have DT for these transfers, but DT will also
1926          * set width, so check that this is allowed */
1927         if (period <= np->minsync && spi_width(starget))
1928                 tp->tgoal.dt = 1;
1929
1930         tp->tgoal.period = period;
1931         tp->tgoal.check_nego = 1;
1932 }
1933
1934 static void sym2_set_width(struct scsi_target *starget, int width)
1935 {
1936         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1937         struct sym_hcb *np = sym_get_hcb(shost);
1938         struct sym_tcb *tp = &np->target[starget->id];
1939
1940         /* It is illegal to have DT set on narrow transfers.  If DT is
1941          * clear, we must also clear IU and QAS.  */
1942         if (width == 0)
1943                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1944
1945         tp->tgoal.width = width;
1946         tp->tgoal.check_nego = 1;
1947 }
1948
1949 static void sym2_set_dt(struct scsi_target *starget, int dt)
1950 {
1951         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1952         struct sym_hcb *np = sym_get_hcb(shost);
1953         struct sym_tcb *tp = &np->target[starget->id];
1954
1955         /* We must clear QAS and IU if DT is clear */
1956         if (dt)
1957                 tp->tgoal.dt = 1;
1958         else
1959                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1960         tp->tgoal.check_nego = 1;
1961 }
1962
1963 #if 0
1964 static void sym2_set_iu(struct scsi_target *starget, int iu)
1965 {
1966         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1967         struct sym_hcb *np = sym_get_hcb(shost);
1968         struct sym_tcb *tp = &np->target[starget->id];
1969
1970         if (iu)
1971                 tp->tgoal.iu = tp->tgoal.dt = 1;
1972         else
1973                 tp->tgoal.iu = 0;
1974         tp->tgoal.check_nego = 1;
1975 }
1976
1977 static void sym2_set_qas(struct scsi_target *starget, int qas)
1978 {
1979         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1980         struct sym_hcb *np = sym_get_hcb(shost);
1981         struct sym_tcb *tp = &np->target[starget->id];
1982
1983         if (qas)
1984                 tp->tgoal.dt = tp->tgoal.qas = 1;
1985         else
1986                 tp->tgoal.qas = 0;
1987         tp->tgoal.check_nego = 1;
1988 }
1989 #endif
1990
1991 static struct spi_function_template sym2_transport_functions = {
1992         .set_offset     = sym2_set_offset,
1993         .show_offset    = 1,
1994         .set_period     = sym2_set_period,
1995         .show_period    = 1,
1996         .set_width      = sym2_set_width,
1997         .show_width     = 1,
1998         .set_dt         = sym2_set_dt,
1999         .show_dt        = 1,
2000 #if 0
2001         .set_iu         = sym2_set_iu,
2002         .show_iu        = 1,
2003         .set_qas        = sym2_set_qas,
2004         .show_qas       = 1,
2005 #endif
2006         .get_signalling = sym2_get_signalling,
2007 };
2008
2009 static struct pci_device_id sym2_id_table[] __devinitdata = {
2010         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2011           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2012         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2013           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2014         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2015           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2016         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2017           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2018         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2019           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2020         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2021           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2022         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2023           PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL },
2024         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2025           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2026         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2027           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2028         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2029           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2030         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2031           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2032         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2033           PCI_ANY_ID, PCI_ANY_ID,  PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL }, /* new */
2034         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2035           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2036         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2037           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2038         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2039           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2040         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2041           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2042         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2043           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2044         { 0, }
2045 };
2046
2047 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2048
2049 static struct pci_error_handlers sym2_err_handler = {
2050         .error_detected = sym2_io_error_detected,
2051         .mmio_enabled   = sym2_io_slot_dump,
2052         .slot_reset     = sym2_io_slot_reset,
2053         .resume         = sym2_io_resume,
2054 };
2055
2056 static struct pci_driver sym2_driver = {
2057         .name           = NAME53C8XX,
2058         .id_table       = sym2_id_table,
2059         .probe          = sym2_probe,
2060         .remove         = sym2_remove,
2061         .err_handler    = &sym2_err_handler,
2062 };
2063
2064 static int __init sym2_init(void)
2065 {
2066         int error;
2067
2068         sym2_setup_params();
2069         sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2070         if (!sym2_transport_template)
2071                 return -ENODEV;
2072
2073         error = pci_register_driver(&sym2_driver);
2074         if (error)
2075                 spi_release_transport(sym2_transport_template);
2076         return error;
2077 }
2078
2079 static void __exit sym2_exit(void)
2080 {
2081         pci_unregister_driver(&sym2_driver);
2082         spi_release_transport(sym2_transport_template);
2083 }
2084
2085 module_init(sym2_init);
2086 module_exit(sym2_exit);