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/interrupt.h>
  43 #include <linux/module.h>
  44 #include <linux/moduleparam.h>
  45 #include <linux/spinlock.h>
  46 #include <scsi/scsi.h>
  47 #include <scsi/scsi_tcq.h>
  48 #include <scsi/scsi_device.h>
  49 #include <scsi/scsi_transport.h>
  50
  51 #include "sym_glue.h"
  52 #include "sym_nvram.h"
  53
  54 #define NAME53C         "sym53c"
  55 #define NAME53C8XX      "sym53c8xx"
  56
  57 #define IRQ_FMT "%d"
  58 #define IRQ_PRM(x) (x)
  59
  60 struct sym_driver_setup sym_driver_setup = SYM_LINUX_DRIVER_SETUP;
  61 unsigned int sym_debug_flags = 0;
  62
  63 static char *excl_string;
  64 static char *safe_string;
  65 module_param_named(cmd_per_lun, sym_driver_setup.max_tag, ushort, 0);
  66 module_param_string(tag_ctrl, sym_driver_setup.tag_ctrl, 100, 0);
  67 module_param_named(burst, sym_driver_setup.burst_order, byte, 0);
  68 module_param_named(led, sym_driver_setup.scsi_led, byte, 0);
  69 module_param_named(diff, sym_driver_setup.scsi_diff, byte, 0);
  70 module_param_named(irqm, sym_driver_setup.irq_mode, byte, 0);
  71 module_param_named(buschk, sym_driver_setup.scsi_bus_check, byte, 0);
  72 module_param_named(hostid, sym_driver_setup.host_id, byte, 0);
  73 module_param_named(verb, sym_driver_setup.verbose, byte, 0);
  74 module_param_named(debug, sym_debug_flags, uint, 0);
  75 module_param_named(settle, sym_driver_setup.settle_delay, byte, 0);
  76 module_param_named(nvram, sym_driver_setup.use_nvram, byte, 0);
  77 module_param_named(excl, excl_string, charp, 0);
  78 module_param_named(safe, safe_string, charp, 0);
  79
  80 MODULE_PARM_DESC(cmd_per_lun, "The maximum number of tags to use by default");
  81 MODULE_PARM_DESC(tag_ctrl, "More detailed control over tags per LUN");
  82 MODULE_PARM_DESC(burst, "Maximum burst.  0 to disable, 255 to read from registers");
  83 MODULE_PARM_DESC(led, "Set to 1 to enable LED support");
  84 MODULE_PARM_DESC(diff, "0 for no differential mode, 1 for BIOS, 2 for always, 3 for not GPIO3");
  85 MODULE_PARM_DESC(irqm, "0 for open drain, 1 to leave alone, 2 for totem pole");
  86 MODULE_PARM_DESC(buschk, "0 to not check, 1 for detach on error, 2 for warn on error");
  87 MODULE_PARM_DESC(hostid, "The SCSI ID to use for the host adapters");
  88 MODULE_PARM_DESC(verb, "0 for minimal verbosity, 1 for normal, 2 for excessive");
  89 MODULE_PARM_DESC(debug, "Set bits to enable debugging");
  90 MODULE_PARM_DESC(settle, "Settle delay in seconds.  Default 3");
  91 MODULE_PARM_DESC(nvram, "Option currently not used");
  92 MODULE_PARM_DESC(excl, "List ioport addresses here to prevent controllers from being attached");
  93 MODULE_PARM_DESC(safe, "Set other settings to a \"safe mode\"");
  94
  95 MODULE_LICENSE("GPL");
  96 MODULE_VERSION(SYM_VERSION);
  97 MODULE_AUTHOR("Matthew Wilcox <matthew@wil.cx>");
  98 MODULE_DESCRIPTION("NCR, Symbios and LSI 8xx and 1010 PCI SCSI adapters");
  99
 100 static void sym2_setup_params(void)
 101 {
 102         char *p = excl_string;
 103         int xi = 0;
 104
 105         while (p && (xi < 8)) {
 106                 char *next_p;
 107                 int val = (int) simple_strtoul(p, &next_p, 0);
 108                 sym_driver_setup.excludes[xi++] = val;
 109                 p = next_p;
 110         }
 111
 112         if (safe_string) {
 113                 if (*safe_string == 'y') {
 114                         sym_driver_setup.max_tag = 0;
 115                         sym_driver_setup.burst_order = 0;
 116                         sym_driver_setup.scsi_led = 0;
 117                         sym_driver_setup.scsi_diff = 1;
 118                         sym_driver_setup.irq_mode = 0;
 119                         sym_driver_setup.scsi_bus_check = 2;
 120                         sym_driver_setup.host_id = 7;
 121                         sym_driver_setup.verbose = 2;
 122                         sym_driver_setup.settle_delay = 10;
 123                         sym_driver_setup.use_nvram = 1;
 124                 } else if (*safe_string != 'n') {
 125                         printk(KERN_WARNING NAME53C8XX "Ignoring parameter %s"
 126                                         " passed to safe option", safe_string);
 127                 }
 128         }
 129 }
 130
 131 static struct scsi_transport_template *sym2_transport_template = NULL;
 132
 133 /*
 134  *  Driver private area in the SCSI command structure.
 135  */
 136 struct sym_ucmd {               /* Override the SCSI pointer structure */
 137         unsigned char   to_do;                  /* For error handling */
 138         void (*old_done)(struct scsi_cmnd *);   /* For error handling */
 139         struct completion *eh_done;             /* For error handling */
 140 };
 141
 142 #define SYM_UCMD_PTR(cmd)  ((struct sym_ucmd *)(&(cmd)->SCp))
 143 #define SYM_SOFTC_PTR(cmd) sym_get_hcb(cmd->device->host)
 144
 145 /*
 146  *  Complete a pending CAM CCB.
 147  */
 148 void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *cmd)
 149 {
 150         scsi_dma_unmap(cmd);
 151         cmd->scsi_done(cmd);
 152 }
 153
 154 /*
 155  *  Tell the SCSI layer about a BUS RESET.
 156  */
 157 void sym_xpt_async_bus_reset(struct sym_hcb *np)
 158 {
 159         printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
 160         np->s.settle_time = jiffies + sym_driver_setup.settle_delay * HZ;
 161         np->s.settle_time_valid = 1;
 162         if (sym_verbose >= 2)
 163                 printf_info("%s: command processing suspended for %d seconds\n",
 164                             sym_name(np), sym_driver_setup.settle_delay);
 165 }
 166
 167 /*
 168  *  Tell the SCSI layer about a BUS DEVICE RESET message sent.
 169  */
 170 void sym_xpt_async_sent_bdr(struct sym_hcb *np, int target)
 171 {
 172         printf_notice("%s: TARGET %d has been reset.\n", sym_name(np), target);
 173 }
 174
 175 /*
 176  *  Choose the more appropriate CAM status if
 177  *  the IO encountered an extended error.
 178  */
 179 static int sym_xerr_cam_status(int cam_status, int x_status)
 180 {
 181         if (x_status) {
 182                 if      (x_status & XE_PARITY_ERR)
 183                         cam_status = DID_PARITY;
 184                 else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN))
 185                         cam_status = DID_ERROR;
 186                 else if (x_status & XE_BAD_PHASE)
 187                         cam_status = DID_ERROR;
 188                 else
 189                         cam_status = DID_ERROR;
 190         }
 191         return cam_status;
 192 }
 193
 194 /*
 195  *  Build CAM result for a failed or auto-sensed IO.
 196  */
 197 void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid)
 198 {
 199         struct scsi_cmnd *cmd = cp->cmd;
 200         u_int cam_status, scsi_status, drv_status;
 201
 202         drv_status  = 0;
 203         cam_status  = DID_OK;
 204         scsi_status = cp->ssss_status;
 205
 206         if (cp->host_flags & HF_SENSE) {
 207                 scsi_status = cp->sv_scsi_status;
 208                 resid = cp->sv_resid;
 209                 if (sym_verbose && cp->sv_xerr_status)
 210                         sym_print_xerr(cmd, cp->sv_xerr_status);
 211                 if (cp->host_status == HS_COMPLETE &&
 212                     cp->ssss_status == S_GOOD &&
 213                     cp->xerr_status == 0) {
 214                         cam_status = sym_xerr_cam_status(DID_OK,
 215                                                          cp->sv_xerr_status);
 216                         drv_status = DRIVER_SENSE;
 217                         /*
 218                          *  Bounce back the sense data to user.
 219                          */
 220                         memset(&cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
 221                         memcpy(cmd->sense_buffer, cp->sns_bbuf,
 222                               min(sizeof(cmd->sense_buffer),
 223                                   (size_t)SYM_SNS_BBUF_LEN));
 224 #if 0
 225                         /*
 226                          *  If the device reports a UNIT ATTENTION condition
 227                          *  due to a RESET condition, we should consider all
 228                          *  disconnect CCBs for this unit as aborted.
 229                          */
 230                         if (1) {
 231                                 u_char *p;
 232                                 p  = (u_char *) cmd->sense_data;
 233                                 if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
 234                                         sym_clear_tasks(np, DID_ABORT,
 235                                                         cp->target,cp->lun, -1);
 236                         }
 237 #endif
 238                 } else {
 239                         /*
 240                          * Error return from our internal request sense.  This
 241                          * is bad: we must clear the contingent allegiance
 242                          * condition otherwise the device will always return
 243                          * BUSY.  Use a big stick.
 244                          */
 245                         sym_reset_scsi_target(np, cmd->device->id);
 246                         cam_status = DID_ERROR;
 247                 }
 248         } else if (cp->host_status == HS_COMPLETE)      /* Bad SCSI status */
 249                 cam_status = DID_OK;
 250         else if (cp->host_status == HS_SEL_TIMEOUT)     /* Selection timeout */
 251                 cam_status = DID_NO_CONNECT;
 252         else if (cp->host_status == HS_UNEXPECTED)      /* Unexpected BUS FREE*/
 253                 cam_status = DID_ERROR;
 254         else {                                          /* Extended error */
 255                 if (sym_verbose) {
 256                         sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
 257                                 cp->host_status, cp->ssss_status,
 258                                 cp->xerr_status);
 259                 }
 260                 /*
 261                  *  Set the most appropriate value for CAM status.
 262                  */
 263                 cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
 264         }
 265         scsi_set_resid(cmd, resid);
 266         cmd->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
 267 }
 268
 269 static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
 270 {
 271         int segment;
 272         int use_sg;
 273
 274         cp->data_len = 0;
 275
 276         use_sg = scsi_dma_map(cmd);
 277         if (use_sg > 0) {
 278                 struct scatterlist *sg;
 279                 struct sym_tcb *tp = &np->target[cp->target];
 280                 struct sym_tblmove *data;
 281
 282                 if (use_sg > SYM_CONF_MAX_SG) {
 283                         scsi_dma_unmap(cmd);
 284                         return -1;
 285                 }
 286
 287                 data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
 288
 289                 scsi_for_each_sg(cmd, sg, use_sg, segment) {
 290                         dma_addr_t baddr = sg_dma_address(sg);
 291                         unsigned int len = sg_dma_len(sg);
 292
 293                         if ((len & 1) && (tp->head.wval & EWS)) {
 294                                 len++;
 295                                 cp->odd_byte_adjustment++;
 296                         }
 297
 298                         sym_build_sge(np, &data[segment], baddr, len);
 299                         cp->data_len += len;
 300                 }
 301         } else {
 302                 segment = -2;
 303         }
 304
 305         return segment;
 306 }
 307
 308 /*
 309  *  Queue a SCSI command.
 310  */
 311 static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd)
 312 {
 313         struct scsi_device *sdev = cmd->device;
 314         struct sym_tcb *tp;
 315         struct sym_lcb *lp;
 316         struct sym_ccb *cp;
 317         int     order;
 318
 319         /*
 320          *  Retrieve the target descriptor.
 321          */
 322         tp = &np->target[sdev->id];
 323
 324         /*
 325          *  Select tagged/untagged.
 326          */
 327         lp = sym_lp(tp, sdev->lun);
 328         order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
 329
 330         /*
 331          *  Queue the SCSI IO.
 332          */
 333         cp = sym_get_ccb(np, cmd, order);
 334         if (!cp)
 335                 return 1;       /* Means resource shortage */
 336         sym_queue_scsiio(np, cmd, cp);
 337         return 0;
 338 }
 339
 340 /*
 341  *  Setup buffers and pointers that address the CDB.
 342  */
 343 static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
 344 {
 345         memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len);
 346
 347         cp->phys.cmd.addr = CCB_BA(cp, cdb_buf[0]);
 348         cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
 349
 350         return 0;
 351 }
 352
 353 /*
 354  *  Setup pointers that address the data and start the I/O.
 355  */
 356 int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
 357 {
 358         u32 lastp, goalp;
 359         int dir;
 360
 361         /*
 362          *  Build the CDB.
 363          */
 364         if (sym_setup_cdb(np, cmd, cp))
 365                 goto out_abort;
 366
 367         /*
 368          *  No direction means no data.
 369          */
 370         dir = cmd->sc_data_direction;
 371         if (dir != DMA_NONE) {
 372                 cp->segments = sym_scatter(np, cp, cmd);
 373                 if (cp->segments < 0) {
 374                         sym_set_cam_status(cmd, DID_ERROR);
 375                         goto out_abort;
 376                 }
 377
 378                 /*
 379                  *  No segments means no data.
 380                  */
 381                 if (!cp->segments)
 382                         dir = DMA_NONE;
 383         } else {
 384                 cp->data_len = 0;
 385                 cp->segments = 0;
 386         }
 387
 388         /*
 389          *  Set the data pointer.
 390          */
 391         switch (dir) {
 392         case DMA_BIDIRECTIONAL:
 393                 printk("%s: got DMA_BIDIRECTIONAL command", sym_name(np));
 394                 sym_set_cam_status(cmd, DID_ERROR);
 395                 goto out_abort;
 396         case DMA_TO_DEVICE:
 397                 goalp = SCRIPTA_BA(np, data_out2) + 8;
 398                 lastp = goalp - 8 - (cp->segments * (2*4));
 399                 break;
 400         case DMA_FROM_DEVICE:
 401                 cp->host_flags |= HF_DATA_IN;
 402                 goalp = SCRIPTA_BA(np, data_in2) + 8;
 403                 lastp = goalp - 8 - (cp->segments * (2*4));
 404                 break;
 405         case DMA_NONE:
 406         default:
 407                 lastp = goalp = SCRIPTB_BA(np, no_data);
 408                 break;
 409         }
 410
 411         /*
 412          *  Set all pointers values needed by SCRIPTS.
 413          */
 414         cp->phys.head.lastp = cpu_to_scr(lastp);
 415         cp->phys.head.savep = cpu_to_scr(lastp);
 416         cp->startp          = cp->phys.head.savep;
 417         cp->goalp           = cpu_to_scr(goalp);
 418
 419         /*
 420          *  When `#ifed 1', the code below makes the driver
 421          *  panic on the first attempt to write to a SCSI device.
 422          *  It is the first test we want to do after a driver
 423          *  change that does not seem obviously safe. :)
 424          */
 425 #if 0
 426         switch (cp->cdb_buf[0]) {
 427         case 0x0A: case 0x2A: case 0xAA:
 428                 panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
 429                 break;
 430         default:
 431                 break;
 432         }
 433 #endif
 434
 435         /*
 436          *      activate this job.
 437          */
 438         sym_put_start_queue(np, cp);
 439         return 0;
 440
 441 out_abort:
 442         sym_free_ccb(np, cp);
 443         sym_xpt_done(np, cmd);
 444         return 0;
 445 }
 446
 447
 448 /*
 449  *  timer daemon.
 450  *
 451  *  Misused to keep the driver running when
 452  *  interrupts are not configured correctly.
 453  */
 454 static void sym_timer(struct sym_hcb *np)
 455 {
 456         unsigned long thistime = jiffies;
 457
 458         /*
 459          *  Restart the timer.
 460          */
 461         np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
 462         add_timer(&np->s.timer);
 463
 464         /*
 465          *  If we are resetting the ncr, wait for settle_time before
 466          *  clearing it. Then command processing will be resumed.
 467          */
 468         if (np->s.settle_time_valid) {
 469                 if (time_before_eq(np->s.settle_time, thistime)) {
 470                         if (sym_verbose >= 2 )
 471                                 printk("%s: command processing resumed\n",
 472                                        sym_name(np));
 473                         np->s.settle_time_valid = 0;
 474                 }
 475                 return;
 476         }
 477
 478         /*
 479          *      Nothing to do for now, but that may come.
 480          */
 481         if (np->s.lasttime + 4*HZ < thistime) {
 482                 np->s.lasttime = thistime;
 483         }
 484
 485 #ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
 486         /*
 487          *  Some way-broken PCI bridges may lead to
 488          *  completions being lost when the clearing
 489          *  of the INTFLY flag by the CPU occurs
 490          *  concurrently with the chip raising this flag.
 491          *  If this ever happen, lost completions will
 492          * be reaped here.
 493          */
 494         sym_wakeup_done(np);
 495 #endif
 496 }
 497
 498
 499 /*
 500  *  PCI BUS error handler.
 501  */
 502 void sym_log_bus_error(struct sym_hcb *np)
 503 {
 504         u_short pci_sts;
 505         pci_read_config_word(np->s.device, PCI_STATUS, &pci_sts);
 506         if (pci_sts & 0xf900) {
 507                 pci_write_config_word(np->s.device, PCI_STATUS, pci_sts);
 508                 printf("%s: PCI STATUS = 0x%04x\n",
 509                         sym_name(np), pci_sts & 0xf900);
 510         }
 511 }
 512
 513 /*
 514  * queuecommand method.  Entered with the host adapter lock held and
 515  * interrupts disabled.
 516  */
 517 static int sym53c8xx_queue_command(struct scsi_cmnd *cmd,
 518                                         void (*done)(struct scsi_cmnd *))
 519 {
 520         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
 521         struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
 522         int sts = 0;
 523
 524         cmd->scsi_done = done;
 525         memset(ucp, 0, sizeof(*ucp));
 526
 527         /*
 528          *  Shorten our settle_time if needed for
 529          *  this command not to time out.
 530          */
 531         if (np->s.settle_time_valid && cmd->timeout_per_command) {
 532                 unsigned long tlimit = jiffies + cmd->timeout_per_command;
 533                 tlimit -= SYM_CONF_TIMER_INTERVAL*2;
 534                 if (time_after(np->s.settle_time, tlimit)) {
 535                         np->s.settle_time = tlimit;
 536                 }
 537         }
 538
 539         if (np->s.settle_time_valid)
 540                 return SCSI_MLQUEUE_HOST_BUSY;
 541
 542         sts = sym_queue_command(np, cmd);
 543         if (sts)
 544                 return SCSI_MLQUEUE_HOST_BUSY;
 545         return 0;
 546 }
 547
 548 /*
 549  *  Linux entry point of the interrupt handler.
 550  */
 551 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id)
 552 {
 553         struct sym_hcb *np = dev_id;
 554
 555         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
 556
 557         spin_lock(np->s.host->host_lock);
 558         sym_interrupt(np);
 559         spin_unlock(np->s.host->host_lock);
 560
 561         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
 562
 563         return IRQ_HANDLED;
 564 }
 565
 566 /*
 567  *  Linux entry point of the timer handler
 568  */
 569 static void sym53c8xx_timer(unsigned long npref)
 570 {
 571         struct sym_hcb *np = (struct sym_hcb *)npref;
 572         unsigned long flags;
 573
 574         spin_lock_irqsave(np->s.host->host_lock, flags);
 575         sym_timer(np);
 576         spin_unlock_irqrestore(np->s.host->host_lock, flags);
 577 }
 578
 579
 580 /*
 581  *  What the eh thread wants us to perform.
 582  */
 583 #define SYM_EH_ABORT            0
 584 #define SYM_EH_DEVICE_RESET     1
 585 #define SYM_EH_BUS_RESET        2
 586 #define SYM_EH_HOST_RESET       3
 587
 588 /*
 589  *  What we will do regarding the involved SCSI command.
 590  */
 591 #define SYM_EH_DO_IGNORE        0
 592 #define SYM_EH_DO_WAIT          2
 593
 594 /*
 595  *  scsi_done() alias when error recovery is in progress.
 596  */
 597 static void sym_eh_done(struct scsi_cmnd *cmd)
 598 {
 599         struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
 600         BUILD_BUG_ON(sizeof(struct scsi_pointer) < sizeof(struct sym_ucmd));
 601
 602         cmd->scsi_done = ucmd->old_done;
 603
 604         if (ucmd->to_do == SYM_EH_DO_WAIT)
 605                 complete(ucmd->eh_done);
 606 }
 607
 608 /*
 609  *  Generic method for our eh processing.
 610  *  The 'op' argument tells what we have to do.
 611  */
 612 static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
 613 {
 614         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
 615         struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
 616         struct Scsi_Host *host = cmd->device->host;
 617         SYM_QUEHEAD *qp;
 618         int to_do = SYM_EH_DO_IGNORE;
 619         int sts = -1;
 620         struct completion eh_done;
 621
 622         dev_warn(&cmd->device->sdev_gendev, "%s operation started.\n", opname);
 623
 624         spin_lock_irq(host->host_lock);
 625         /* This one is queued in some place -> to wait for completion */
 626         FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
 627                 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
 628                 if (cp->cmd == cmd) {
 629                         to_do = SYM_EH_DO_WAIT;
 630                         break;
 631                 }
 632         }
 633
 634         if (to_do == SYM_EH_DO_WAIT) {
 635                 init_completion(&eh_done);
 636                 ucmd->old_done = cmd->scsi_done;
 637                 ucmd->eh_done = &eh_done;
 638                 wmb();
 639                 cmd->scsi_done = sym_eh_done;
 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 (np, 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->scsi_done = ucmd->old_done;
 667                 to_do = SYM_EH_DO_IGNORE;
 668         }
 669
 670         ucmd->to_do = to_do;
 671         spin_unlock_irq(host->host_lock);
 672
 673         if (to_do == SYM_EH_DO_WAIT) {
 674                 if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
 675                         ucmd->to_do = SYM_EH_DO_IGNORE;
 676                         wmb();
 677                         sts = -2;
 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 /*
 735  *  Linux select queue depths function
 736  */
 737 #define DEF_DEPTH       (sym_driver_setup.max_tag)
 738 #define ALL_TARGETS     -2
 739 #define NO_TARGET       -1
 740 #define ALL_LUNS        -2
 741 #define NO_LUN          -1
 742
 743 static int device_queue_depth(struct sym_hcb *np, int target, int lun)
 744 {
 745         int c, h, t, u, v;
 746         char *p = sym_driver_setup.tag_ctrl;
 747         char *ep;
 748
 749         h = -1;
 750         t = NO_TARGET;
 751         u = NO_LUN;
 752         while ((c = *p++) != 0) {
 753                 v = simple_strtoul(p, &ep, 0);
 754                 switch(c) {
 755                 case '/':
 756                         ++h;
 757                         t = ALL_TARGETS;
 758                         u = ALL_LUNS;
 759                         break;
 760                 case 't':
 761                         if (t != target)
 762                                 t = (target == v) ? v : NO_TARGET;
 763                         u = ALL_LUNS;
 764                         break;
 765                 case 'u':
 766                         if (u != lun)
 767                                 u = (lun == v) ? v : NO_LUN;
 768                         break;
 769                 case 'q':
 770                         if (h == np->s.unit &&
 771                                 (t == ALL_TARGETS || t == target) &&
 772                                 (u == ALL_LUNS    || u == lun))
 773                                 return v;
 774                         break;
 775                 case '-':
 776                         t = ALL_TARGETS;
 777                         u = ALL_LUNS;
 778                         break;
 779                 default:
 780                         break;
 781                 }
 782                 p = ep;
 783         }
 784         return DEF_DEPTH;
 785 }
 786
 787 static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
 788 {
 789         struct sym_hcb *np = sym_get_hcb(sdev->host);
 790         struct sym_tcb *tp = &np->target[sdev->id];
 791         struct sym_lcb *lp;
 792
 793         if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
 794                 return -ENXIO;
 795
 796         tp->starget = sdev->sdev_target;
 797         /*
 798          * Fail the device init if the device is flagged NOSCAN at BOOT in
 799          * the NVRAM.  This may speed up boot and maintain coherency with
 800          * BIOS device numbering.  Clearing the flag allows the user to
 801          * rescan skipped devices later.  We also return an error for
 802          * devices not flagged for SCAN LUNS in the NVRAM since some single
 803          * lun devices behave badly when asked for a non zero LUN.
 804          */
 805
 806         if (tp->usrflags & SYM_SCAN_BOOT_DISABLED) {
 807                 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
 808                 starget_printk(KERN_INFO, tp->starget,
 809                                 "Scan at boot disabled in NVRAM\n");
 810                 return -ENXIO;
 811         }
 812
 813         if (tp->usrflags & SYM_SCAN_LUNS_DISABLED) {
 814                 if (sdev->lun != 0)
 815                         return -ENXIO;
 816                 starget_printk(KERN_INFO, tp->starget,
 817                                 "Multiple LUNs disabled in NVRAM\n");
 818         }
 819
 820         lp = sym_alloc_lcb(np, sdev->id, sdev->lun);
 821         if (!lp)
 822                 return -ENOMEM;
 823
 824         spi_min_period(tp->starget) = tp->usr_period;
 825         spi_max_width(tp->starget) = tp->usr_width;
 826
 827         return 0;
 828 }
 829
 830 /*
 831  * Linux entry point for device queue sizing.
 832  */
 833 static int sym53c8xx_slave_configure(struct scsi_device *sdev)
 834 {
 835         struct sym_hcb *np = sym_get_hcb(sdev->host);
 836         struct sym_tcb *tp = &np->target[sdev->id];
 837         struct sym_lcb *lp = sym_lp(tp, sdev->lun);
 838         int reqtags, depth_to_use;
 839
 840         /*
 841          *  Get user flags.
 842          */
 843         lp->curr_flags = lp->user_flags;
 844
 845         /*
 846          *  Select queue depth from driver setup.
 847          *  Donnot use more than configured by user.
 848          *  Use at least 2.
 849          *  Donnot use more than our maximum.
 850          */
 851         reqtags = device_queue_depth(np, sdev->id, sdev->lun);
 852         if (reqtags > tp->usrtags)
 853                 reqtags = tp->usrtags;
 854         if (!sdev->tagged_supported)
 855                 reqtags = 0;
 856 #if 1 /* Avoid to locally queue commands for no good reasons */
 857         if (reqtags > SYM_CONF_MAX_TAG)
 858                 reqtags = SYM_CONF_MAX_TAG;
 859         depth_to_use = (reqtags ? reqtags : 2);
 860 #else
 861         depth_to_use = (reqtags ? SYM_CONF_MAX_TAG : 2);
 862 #endif
 863         scsi_adjust_queue_depth(sdev,
 864                                 (sdev->tagged_supported ?
 865                                  MSG_SIMPLE_TAG : 0),
 866                                 depth_to_use);
 867         lp->s.scdev_depth = depth_to_use;
 868         sym_tune_dev_queuing(tp, sdev->lun, reqtags);
 869
 870         if (!spi_initial_dv(sdev->sdev_target))
 871                 spi_dv_device(sdev);
 872
 873         return 0;
 874 }
 875
 876 static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
 877 {
 878         struct sym_hcb *np = sym_get_hcb(sdev->host);
 879         struct sym_lcb *lp = sym_lp(&np->target[sdev->id], sdev->lun);
 880
 881         if (lp->itlq_tbl)
 882                 sym_mfree_dma(lp->itlq_tbl, SYM_CONF_MAX_TASK * 4, "ITLQ_TBL");
 883         kfree(lp->cb_tags);
 884         sym_mfree_dma(lp, sizeof(*lp), "LCB");
 885 }
 886
 887 /*
 888  *  Linux entry point for info() function
 889  */
 890 static const char *sym53c8xx_info (struct Scsi_Host *host)
 891 {
 892         return SYM_DRIVER_NAME;
 893 }
 894
 895
 896 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
 897 /*
 898  *  Proc file system stuff
 899  *
 900  *  A read operation returns adapter information.
 901  *  A write operation is a control command.
 902  *  The string is parsed in the driver code and the command is passed
 903  *  to the sym_usercmd() function.
 904  */
 905
 906 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
 907
 908 struct  sym_usrcmd {
 909         u_long  target;
 910         u_long  lun;
 911         u_long  data;
 912         u_long  cmd;
 913 };
 914
 915 #define UC_SETSYNC      10
 916 #define UC_SETTAGS      11
 917 #define UC_SETDEBUG     12
 918 #define UC_SETWIDE      14
 919 #define UC_SETFLAG      15
 920 #define UC_SETVERBOSE   17
 921 #define UC_RESETDEV     18
 922 #define UC_CLEARDEV     19
 923
 924 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
 925 {
 926         struct sym_tcb *tp;
 927         int t, l;
 928
 929         switch (uc->cmd) {
 930         case 0: return;
 931
 932 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
 933         case UC_SETDEBUG:
 934                 sym_debug_flags = uc->data;
 935                 break;
 936 #endif
 937         case UC_SETVERBOSE:
 938                 np->verbose = uc->data;
 939                 break;
 940         default:
 941                 /*
 942                  * We assume that other commands apply to targets.
 943                  * This should always be the case and avoid the below
 944                  * 4 lines to be repeated 6 times.
 945                  */
 946                 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
 947                         if (!((uc->target >> t) & 1))
 948                                 continue;
 949                         tp = &np->target[t];
 950
 951                         switch (uc->cmd) {
 952
 953                         case UC_SETSYNC:
 954                                 if (!uc->data || uc->data >= 255) {
 955                                         tp->tgoal.iu = tp->tgoal.dt =
 956                                                 tp->tgoal.qas = 0;
 957                                         tp->tgoal.offset = 0;
 958                                 } else if (uc->data <= 9 && np->minsync_dt) {
 959                                         if (uc->data < np->minsync_dt)
 960                                                 uc->data = np->minsync_dt;
 961                                         tp->tgoal.iu = tp->tgoal.dt =
 962                                                 tp->tgoal.qas = 1;
 963                                         tp->tgoal.width = 1;
 964                                         tp->tgoal.period = uc->data;
 965                                         tp->tgoal.offset = np->maxoffs_dt;
 966                                 } else {
 967                                         if (uc->data < np->minsync)
 968                                                 uc->data = np->minsync;
 969                                         tp->tgoal.iu = tp->tgoal.dt =
 970                                                 tp->tgoal.qas = 0;
 971                                         tp->tgoal.period = uc->data;
 972                                         tp->tgoal.offset = np->maxoffs;
 973                                 }
 974                                 tp->tgoal.check_nego = 1;
 975                                 break;
 976                         case UC_SETWIDE:
 977                                 tp->tgoal.width = uc->data ? 1 : 0;
 978                                 tp->tgoal.check_nego = 1;
 979                                 break;
 980                         case UC_SETTAGS:
 981                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
 982                                         sym_tune_dev_queuing(tp, l, uc->data);
 983                                 break;
 984                         case UC_RESETDEV:
 985                                 tp->to_reset = 1;
 986                                 np->istat_sem = SEM;
 987                                 OUTB(np, nc_istat, SIGP|SEM);
 988                                 break;
 989                         case UC_CLEARDEV:
 990                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
 991                                         struct sym_lcb *lp = sym_lp(tp, l);
 992                                         if (lp) lp->to_clear = 1;
 993                                 }
 994                                 np->istat_sem = SEM;
 995                                 OUTB(np, nc_istat, SIGP|SEM);
 996                                 break;
 997                         case UC_SETFLAG:
 998                                 tp->usrflags = uc->data;
 999                                 break;
1000                         }
1001                 }
1002                 break;
1003         }
1004 }
1005
1006 static int skip_spaces(char *ptr, int len)
1007 {
1008         int cnt, c;
1009
1010         for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
1011
1012         return (len - cnt);
1013 }
1014
1015 static int get_int_arg(char *ptr, int len, u_long *pv)
1016 {
1017         char *end;
1018
1019         *pv = simple_strtoul(ptr, &end, 10);
1020         return (end - ptr);
1021 }
1022
1023 static int is_keyword(char *ptr, int len, char *verb)
1024 {
1025         int verb_len = strlen(verb);
1026
1027         if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1028                 return verb_len;
1029         else
1030                 return 0;
1031 }
1032
1033 #define SKIP_SPACES(ptr, len)                                           \
1034         if ((arg_len = skip_spaces(ptr, len)) < 1)                      \
1035                 return -EINVAL;                                         \
1036         ptr += arg_len; len -= arg_len;
1037
1038 #define GET_INT_ARG(ptr, len, v)                                        \
1039         if (!(arg_len = get_int_arg(ptr, len, &(v))))                   \
1040                 return -EINVAL;                                         \
1041         ptr += arg_len; len -= arg_len;
1042
1043
1044 /*
1045  * Parse a control command
1046  */
1047
1048 static int sym_user_command(struct sym_hcb *np, char *buffer, int length)
1049 {
1050         char *ptr       = buffer;
1051         int len         = length;
1052         struct sym_usrcmd cmd, *uc = &cmd;
1053         int             arg_len;
1054         u_long          target;
1055
1056         memset(uc, 0, sizeof(*uc));
1057
1058         if (len > 0 && ptr[len-1] == '\n')
1059                 --len;
1060
1061         if      ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1062                 uc->cmd = UC_SETSYNC;
1063         else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1064                 uc->cmd = UC_SETTAGS;
1065         else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1066                 uc->cmd = UC_SETVERBOSE;
1067         else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1068                 uc->cmd = UC_SETWIDE;
1069 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1070         else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1071                 uc->cmd = UC_SETDEBUG;
1072 #endif
1073         else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1074                 uc->cmd = UC_SETFLAG;
1075         else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1076                 uc->cmd = UC_RESETDEV;
1077         else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1078                 uc->cmd = UC_CLEARDEV;
1079         else
1080                 arg_len = 0;
1081
1082 #ifdef DEBUG_PROC_INFO
1083 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1084 #endif
1085
1086         if (!arg_len)
1087                 return -EINVAL;
1088         ptr += arg_len; len -= arg_len;
1089
1090         switch(uc->cmd) {
1091         case UC_SETSYNC:
1092         case UC_SETTAGS:
1093         case UC_SETWIDE:
1094         case UC_SETFLAG:
1095         case UC_RESETDEV:
1096         case UC_CLEARDEV:
1097                 SKIP_SPACES(ptr, len);
1098                 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1099                         ptr += arg_len; len -= arg_len;
1100                         uc->target = ~0;
1101                 } else {
1102                         GET_INT_ARG(ptr, len, target);
1103                         uc->target = (1<<target);
1104 #ifdef DEBUG_PROC_INFO
1105 printk("sym_user_command: target=%ld\n", target);
1106 #endif
1107                 }
1108                 break;
1109         }
1110
1111         switch(uc->cmd) {
1112         case UC_SETVERBOSE:
1113         case UC_SETSYNC:
1114         case UC_SETTAGS:
1115         case UC_SETWIDE:
1116                 SKIP_SPACES(ptr, len);
1117                 GET_INT_ARG(ptr, len, uc->data);
1118 #ifdef DEBUG_PROC_INFO
1119 printk("sym_user_command: data=%ld\n", uc->data);
1120 #endif
1121                 break;
1122 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1123         case UC_SETDEBUG:
1124                 while (len > 0) {
1125                         SKIP_SPACES(ptr, len);
1126                         if      ((arg_len = is_keyword(ptr, len, "alloc")))
1127                                 uc->data |= DEBUG_ALLOC;
1128                         else if ((arg_len = is_keyword(ptr, len, "phase")))
1129                                 uc->data |= DEBUG_PHASE;
1130                         else if ((arg_len = is_keyword(ptr, len, "queue")))
1131                                 uc->data |= DEBUG_QUEUE;
1132                         else if ((arg_len = is_keyword(ptr, len, "result")))
1133                                 uc->data |= DEBUG_RESULT;
1134                         else if ((arg_len = is_keyword(ptr, len, "scatter")))
1135                                 uc->data |= DEBUG_SCATTER;
1136                         else if ((arg_len = is_keyword(ptr, len, "script")))
1137                                 uc->data |= DEBUG_SCRIPT;
1138                         else if ((arg_len = is_keyword(ptr, len, "tiny")))
1139                                 uc->data |= DEBUG_TINY;
1140                         else if ((arg_len = is_keyword(ptr, len, "timing")))
1141                                 uc->data |= DEBUG_TIMING;
1142                         else if ((arg_len = is_keyword(ptr, len, "nego")))
1143                                 uc->data |= DEBUG_NEGO;
1144                         else if ((arg_len = is_keyword(ptr, len, "tags")))
1145                                 uc->data |= DEBUG_TAGS;
1146                         else if ((arg_len = is_keyword(ptr, len, "pointer")))
1147                                 uc->data |= DEBUG_POINTER;
1148                         else
1149                                 return -EINVAL;
1150                         ptr += arg_len; len -= arg_len;
1151                 }
1152 #ifdef DEBUG_PROC_INFO
1153 printk("sym_user_command: data=%ld\n", uc->data);
1154 #endif
1155                 break;
1156 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1157         case UC_SETFLAG:
1158                 while (len > 0) {
1159                         SKIP_SPACES(ptr, len);
1160                         if      ((arg_len = is_keyword(ptr, len, "no_disc")))
1161                                 uc->data &= ~SYM_DISC_ENABLED;
1162                         else
1163                                 return -EINVAL;
1164                         ptr += arg_len; len -= arg_len;
1165                 }
1166                 break;
1167         default:
1168                 break;
1169         }
1170
1171         if (len)
1172                 return -EINVAL;
1173         else {
1174                 unsigned long flags;
1175
1176                 spin_lock_irqsave(np->s.host->host_lock, flags);
1177                 sym_exec_user_command (np, uc);
1178                 spin_unlock_irqrestore(np->s.host->host_lock, flags);
1179         }
1180         return length;
1181 }
1182
1183 #endif  /* SYM_LINUX_USER_COMMAND_SUPPORT */
1184
1185
1186 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1187 /*
1188  *  Informations through the proc file system.
1189  */
1190 struct info_str {
1191         char *buffer;
1192         int length;
1193         int offset;
1194         int pos;
1195 };
1196
1197 static void copy_mem_info(struct info_str *info, char *data, int len)
1198 {
1199         if (info->pos + len > info->length)
1200                 len = info->length - info->pos;
1201
1202         if (info->pos + len < info->offset) {
1203                 info->pos += len;
1204                 return;
1205         }
1206         if (info->pos < info->offset) {
1207                 data += (info->offset - info->pos);
1208                 len  -= (info->offset - info->pos);
1209         }
1210
1211         if (len > 0) {
1212                 memcpy(info->buffer + info->pos, data, len);
1213                 info->pos += len;
1214         }
1215 }
1216
1217 static int copy_info(struct info_str *info, char *fmt, ...)
1218 {
1219         va_list args;
1220         char buf[81];
1221         int len;
1222
1223         va_start(args, fmt);
1224         len = vsprintf(buf, fmt, args);
1225         va_end(args);
1226
1227         copy_mem_info(info, buf, len);
1228         return len;
1229 }
1230
1231 /*
1232  *  Copy formatted information into the input buffer.
1233  */
1234 static int sym_host_info(struct sym_hcb *np, char *ptr, off_t offset, int len)
1235 {
1236         struct info_str info;
1237
1238         info.buffer     = ptr;
1239         info.length     = len;
1240         info.offset     = offset;
1241         info.pos        = 0;
1242
1243         copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1244                          "revision id 0x%x\n",
1245                          np->s.chip_name, np->device_id, np->revision_id);
1246         copy_info(&info, "At PCI address %s, IRQ " IRQ_FMT "\n",
1247                 pci_name(np->s.device), IRQ_PRM(np->s.device->irq));
1248         copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1249                          (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1250                          np->maxwide ? "Wide" : "Narrow",
1251                          np->minsync_dt ? ", DT capable" : "");
1252
1253         copy_info(&info, "Max. started commands %d, "
1254                          "max. commands per LUN %d\n",
1255                          SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1256
1257         return info.pos > info.offset? info.pos - info.offset : 0;
1258 }
1259 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1260
1261 /*
1262  *  Entry point of the scsi proc fs of the driver.
1263  *  - func = 0 means read  (returns adapter infos)
1264  *  - func = 1 means write (not yet merget from sym53c8xx)
1265  */
1266 static int sym53c8xx_proc_info(struct Scsi_Host *host, char *buffer,
1267                         char **start, off_t offset, int length, int func)
1268 {
1269         struct sym_hcb *np = sym_get_hcb(host);
1270         int retv;
1271
1272         if (func) {
1273 #ifdef  SYM_LINUX_USER_COMMAND_SUPPORT
1274                 retv = sym_user_command(np, buffer, length);
1275 #else
1276                 retv = -EINVAL;
1277 #endif
1278         } else {
1279                 if (start)
1280                         *start = buffer;
1281 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1282                 retv = sym_host_info(np, buffer, offset, length);
1283 #else
1284                 retv = -EINVAL;
1285 #endif
1286         }
1287
1288         return retv;
1289 }
1290 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1291
1292 /*
1293  *      Free controller resources.
1294  */
1295 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev)
1296 {
1297         /*
1298          *  Free O/S specific resources.
1299          */
1300         if (pdev->irq)
1301                 free_irq(pdev->irq, np);
1302         if (np->s.ioaddr)
1303                 pci_iounmap(pdev, np->s.ioaddr);
1304         if (np->s.ramaddr)
1305                 pci_iounmap(pdev, np->s.ramaddr);
1306         /*
1307          *  Free O/S independent resources.
1308          */
1309         sym_hcb_free(np);
1310
1311         sym_mfree_dma(np, sizeof(*np), "HCB");
1312 }
1313
1314 /*
1315  *  Ask/tell the system about DMA addressing.
1316  */
1317 static int sym_setup_bus_dma_mask(struct sym_hcb *np)
1318 {
1319 #if SYM_CONF_DMA_ADDRESSING_MODE > 0
1320 #if   SYM_CONF_DMA_ADDRESSING_MODE == 1
1321 #define DMA_DAC_MASK    DMA_40BIT_MASK
1322 #elif SYM_CONF_DMA_ADDRESSING_MODE == 2
1323 #define DMA_DAC_MASK    DMA_64BIT_MASK
1324 #endif
1325         if ((np->features & FE_DAC) &&
1326                         !pci_set_dma_mask(np->s.device, DMA_DAC_MASK)) {
1327                 np->use_dac = 1;
1328                 return 0;
1329         }
1330 #endif
1331
1332         if (!pci_set_dma_mask(np->s.device, DMA_32BIT_MASK))
1333                 return 0;
1334
1335         printf_warning("%s: No suitable DMA available\n", sym_name(np));
1336         return -1;
1337 }
1338
1339 /*
1340  *  Host attach and initialisations.
1341  *
1342  *  Allocate host data and ncb structure.
1343  *  Remap MMIO region.
1344  *  Do chip initialization.
1345  *  If all is OK, install interrupt handling and
1346  *  start the timer daemon.
1347  */
1348 static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1349                 int unit, struct sym_device *dev)
1350 {
1351         struct host_data *host_data;
1352         struct sym_hcb *np = NULL;
1353         struct Scsi_Host *instance = NULL;
1354         struct pci_dev *pdev = dev->pdev;
1355         unsigned long flags;
1356         struct sym_fw *fw;
1357
1358         printk(KERN_INFO
1359                 "sym%d: <%s> rev 0x%x at pci %s irq " IRQ_FMT "\n",
1360                 unit, dev->chip.name, dev->chip.revision_id,
1361                 pci_name(pdev), IRQ_PRM(pdev->irq));
1362
1363         /*
1364          *  Get the firmware for this chip.
1365          */
1366         fw = sym_find_firmware(&dev->chip);
1367         if (!fw)
1368                 goto attach_failed;
1369
1370         /*
1371          *      Allocate host_data structure
1372          */
1373         instance = scsi_host_alloc(tpnt, sizeof(*host_data));
1374         if (!instance)
1375                 goto attach_failed;
1376         host_data = (struct host_data *) instance->hostdata;
1377
1378         /*
1379          *  Allocate immediately the host control block,
1380          *  since we are only expecting to succeed. :)
1381          *  We keep track in the HCB of all the resources that
1382          *  are to be released on error.
1383          */
1384         np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1385         if (!np)
1386                 goto attach_failed;
1387         np->s.device = pdev;
1388         np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1389         host_data->ncb = np;
1390         np->s.host = instance;
1391
1392         pci_set_drvdata(pdev, np);
1393
1394         /*
1395          *  Copy some useful infos to the HCB.
1396          */
1397         np->hcb_ba      = vtobus(np);
1398         np->verbose     = sym_driver_setup.verbose;
1399         np->s.device    = pdev;
1400         np->s.unit      = unit;
1401         np->device_id   = dev->chip.device_id;
1402         np->revision_id = dev->chip.revision_id;
1403         np->features    = dev->chip.features;
1404         np->clock_divn  = dev->chip.nr_divisor;
1405         np->maxoffs     = dev->chip.offset_max;
1406         np->maxburst    = dev->chip.burst_max;
1407         np->myaddr      = dev->host_id;
1408
1409         /*
1410          *  Edit its name.
1411          */
1412         strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1413         sprintf(np->s.inst_name, "sym%d", np->s.unit);
1414
1415         if (sym_setup_bus_dma_mask(np))
1416                 goto attach_failed;
1417
1418         /*
1419          *  Try to map the controller chip to
1420          *  virtual and physical memory.
1421          */
1422         np->mmio_ba = (u32)dev->mmio_base;
1423         np->s.ioaddr    = dev->s.ioaddr;
1424         np->s.ramaddr   = dev->s.ramaddr;
1425         np->s.io_ws = (np->features & FE_IO256) ? 256 : 128;
1426
1427         /*
1428          *  Map on-chip RAM if present and supported.
1429          */
1430         if (!(np->features & FE_RAM))
1431                 dev->ram_base = 0;
1432         if (dev->ram_base) {
1433                 np->ram_ba = (u32)dev->ram_base;
1434                 np->ram_ws = (np->features & FE_RAM8K) ? 8192 : 4096;
1435         }
1436
1437         if (sym_hcb_attach(instance, fw, dev->nvram))
1438                 goto attach_failed;
1439
1440         /*
1441          *  Install the interrupt handler.
1442          *  If we synchonize the C code with SCRIPTS on interrupt,
1443          *  we do not want to share the INTR line at all.
1444          */
1445         if (request_irq(pdev->irq, sym53c8xx_intr, IRQF_SHARED, NAME53C8XX, np)) {
1446                 printf_err("%s: request irq %d failure\n",
1447                         sym_name(np), pdev->irq);
1448                 goto attach_failed;
1449         }
1450
1451         /*
1452          *  After SCSI devices have been opened, we cannot
1453          *  reset the bus safely, so we do it here.
1454          */
1455         spin_lock_irqsave(instance->host_lock, flags);
1456         if (sym_reset_scsi_bus(np, 0))
1457                 goto reset_failed;
1458
1459         /*
1460          *  Start the SCRIPTS.
1461          */
1462         sym_start_up (np, 1);
1463
1464         /*
1465          *  Start the timer daemon
1466          */
1467         init_timer(&np->s.timer);
1468         np->s.timer.data     = (unsigned long) np;
1469         np->s.timer.function = sym53c8xx_timer;
1470         np->s.lasttime=0;
1471         sym_timer (np);
1472
1473         /*
1474          *  Fill Linux host instance structure
1475          *  and return success.
1476          */
1477         instance->max_channel   = 0;
1478         instance->this_id       = np->myaddr;
1479         instance->max_id        = np->maxwide ? 16 : 8;
1480         instance->max_lun       = SYM_CONF_MAX_LUN;
1481         instance->unique_id     = pci_resource_start(pdev, 0);
1482         instance->cmd_per_lun   = SYM_CONF_MAX_TAG;
1483         instance->can_queue     = (SYM_CONF_MAX_START-2);
1484         instance->sg_tablesize  = SYM_CONF_MAX_SG;
1485         instance->max_cmd_len   = 16;
1486         BUG_ON(sym2_transport_template == NULL);
1487         instance->transportt    = sym2_transport_template;
1488
1489         /* 53c896 rev 1 errata: DMA may not cross 16MB boundary */
1490         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && np->revision_id < 2)
1491                 instance->dma_boundary = 0xFFFFFF;
1492
1493         spin_unlock_irqrestore(instance->host_lock, flags);
1494
1495         return instance;
1496
1497  reset_failed:
1498         printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1499                    "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1500         spin_unlock_irqrestore(instance->host_lock, flags);
1501  attach_failed:
1502         if (!instance)
1503                 return NULL;
1504         printf_info("%s: giving up ...\n", sym_name(np));
1505         if (np)
1506                 sym_free_resources(np, pdev);
1507         scsi_host_put(instance);
1508
1509         return NULL;
1510  }
1511
1512
1513 /*
1514  *    Detect and try to read SYMBIOS and TEKRAM NVRAM.
1515  */
1516 #if SYM_CONF_NVRAM_SUPPORT
1517 static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1518 {
1519         devp->nvram = nvp;
1520         devp->device_id = devp->chip.device_id;
1521         nvp->type = 0;
1522
1523         sym_read_nvram(devp, nvp);
1524 }
1525 #else
1526 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1527 {
1528 }
1529 #endif  /* SYM_CONF_NVRAM_SUPPORT */
1530
1531 static int __devinit sym_check_supported(struct sym_device *device)
1532 {
1533         struct sym_chip *chip;
1534         struct pci_dev *pdev = device->pdev;
1535         u_char revision;
1536         unsigned long io_port = pci_resource_start(pdev, 0);
1537         int i;
1538
1539         /*
1540          *  If user excluded this chip, do not initialize it.
1541          *  I hate this code so much.  Must kill it.
1542          */
1543         if (io_port) {
1544                 for (i = 0 ; i < 8 ; i++) {
1545                         if (sym_driver_setup.excludes[i] == io_port)
1546                                 return -ENODEV;
1547                 }
1548         }
1549
1550         /*
1551          * Check if the chip is supported.  Then copy the chip description
1552          * to our device structure so we can make it match the actual device
1553          * and options.
1554          */
1555         pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
1556         chip = sym_lookup_chip_table(pdev->device, revision);
1557         if (!chip) {
1558                 dev_info(&pdev->dev, "device not supported\n");
1559                 return -ENODEV;
1560         }
1561         memcpy(&device->chip, chip, sizeof(device->chip));
1562         device->chip.revision_id = revision;
1563
1564         return 0;
1565 }
1566
1567 /*
1568  * Ignore Symbios chips controlled by various RAID controllers.
1569  * These controllers set value 0x52414944 at RAM end - 16.
1570  */
1571 static int __devinit sym_check_raid(struct sym_device *device)
1572 {
1573         unsigned int ram_size, ram_val;
1574
1575         if (!device->s.ramaddr)
1576                 return 0;
1577
1578         if (device->chip.features & FE_RAM8K)
1579                 ram_size = 8192;
1580         else
1581                 ram_size = 4096;
1582
1583         ram_val = readl(device->s.ramaddr + ram_size - 16);
1584         if (ram_val != 0x52414944)
1585                 return 0;
1586
1587         dev_info(&device->pdev->dev,
1588                         "not initializing, driven by RAID controller.\n");
1589         return -ENODEV;
1590 }
1591
1592 static int __devinit sym_set_workarounds(struct sym_device *device)
1593 {
1594         struct sym_chip *chip = &device->chip;
1595         struct pci_dev *pdev = device->pdev;
1596         u_short status_reg;
1597
1598         /*
1599          *  (ITEM 12 of a DEL about the 896 I haven't yet).
1600          *  We must ensure the chip will use WRITE AND INVALIDATE.
1601          *  The revision number limit is for now arbitrary.
1602          */
1603         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && chip->revision_id < 0x4) {
1604                 chip->features  |= (FE_WRIE | FE_CLSE);
1605         }
1606
1607         /* If the chip can do Memory Write Invalidate, enable it */
1608         if (chip->features & FE_WRIE) {
1609                 if (pci_set_mwi(pdev))
1610                         return -ENODEV;
1611         }
1612
1613         /*
1614          *  Work around for errant bit in 895A. The 66Mhz
1615          *  capable bit is set erroneously. Clear this bit.
1616          *  (Item 1 DEL 533)
1617          *
1618          *  Make sure Config space and Features agree.
1619          *
1620          *  Recall: writes are not normal to status register -
1621          *  write a 1 to clear and a 0 to leave unchanged.
1622          *  Can only reset bits.
1623          */
1624         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1625         if (chip->features & FE_66MHZ) {
1626                 if (!(status_reg & PCI_STATUS_66MHZ))
1627                         chip->features &= ~FE_66MHZ;
1628         } else {
1629                 if (status_reg & PCI_STATUS_66MHZ) {
1630                         status_reg = PCI_STATUS_66MHZ;
1631                         pci_write_config_word(pdev, PCI_STATUS, status_reg);
1632                         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1633                 }
1634         }
1635
1636         return 0;
1637 }
1638
1639 /*
1640  *  Read and check the PCI configuration for any detected NCR
1641  *  boards and save data for attaching after all boards have
1642  *  been detected.
1643  */
1644 static void __devinit
1645 sym_init_device(struct pci_dev *pdev, struct sym_device *device)
1646 {
1647         int i = 2;
1648         struct pci_bus_region bus_addr;
1649
1650         device->host_id = SYM_SETUP_HOST_ID;
1651         device->pdev = pdev;
1652
1653         pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[1]);
1654         device->mmio_base = bus_addr.start;
1655
1656         /*
1657          * If the BAR is 64-bit, resource 2 will be occupied by the
1658          * upper 32 bits
1659          */
1660         if (!pdev->resource[i].flags)
1661                 i++;
1662         pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[i]);
1663         device->ram_base = bus_addr.start;
1664
1665 #ifdef CONFIG_SCSI_SYM53C8XX_MMIO
1666         if (device->mmio_base)
1667                 device->s.ioaddr = pci_iomap(pdev, 1,
1668                                                 pci_resource_len(pdev, 1));
1669 #endif
1670         if (!device->s.ioaddr)
1671                 device->s.ioaddr = pci_iomap(pdev, 0,
1672                                                 pci_resource_len(pdev, 0));
1673         if (device->ram_base)
1674                 device->s.ramaddr = pci_iomap(pdev, i,
1675                                                 pci_resource_len(pdev, i));
1676 }
1677
1678 /*
1679  * The NCR PQS and PDS cards are constructed as a DEC bridge
1680  * behind which sits a proprietary NCR memory controller and
1681  * either four or two 53c875s as separate devices.  We can tell
1682  * if an 875 is part of a PQS/PDS or not since if it is, it will
1683  * be on the same bus as the memory controller.  In its usual
1684  * mode of operation, the 875s are slaved to the memory
1685  * controller for all transfers.  To operate with the Linux
1686  * driver, the memory controller is disabled and the 875s
1687  * freed to function independently.  The only wrinkle is that
1688  * the preset SCSI ID (which may be zero) must be read in from
1689  * a special configuration space register of the 875.
1690  */
1691 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1692 {
1693         int slot;
1694         u8 tmp;
1695
1696         for (slot = 0; slot < 256; slot++) {
1697                 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1698
1699                 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1700                         pci_dev_put(memc);
1701                         continue;
1702                 }
1703
1704                 /* bit 1: allow individual 875 configuration */
1705                 pci_read_config_byte(memc, 0x44, &tmp);
1706                 if ((tmp & 0x2) == 0) {
1707                         tmp |= 0x2;
1708                         pci_write_config_byte(memc, 0x44, tmp);
1709                 }
1710
1711                 /* bit 2: drive individual 875 interrupts to the bus */
1712                 pci_read_config_byte(memc, 0x45, &tmp);
1713                 if ((tmp & 0x4) == 0) {
1714                         tmp |= 0x4;
1715                         pci_write_config_byte(memc, 0x45, tmp);
1716                 }
1717
1718                 pci_dev_put(memc);
1719                 break;
1720         }
1721
1722         pci_read_config_byte(pdev, 0x84, &tmp);
1723         sym_dev->host_id = tmp;
1724 }
1725
1726 /*
1727  *  Called before unloading the module.
1728  *  Detach the host.
1729  *  We have to free resources and halt the NCR chip.
1730  */
1731 static int sym_detach(struct sym_hcb *np, struct pci_dev *pdev)
1732 {
1733         printk("%s: detaching ...\n", sym_name(np));
1734
1735         del_timer_sync(&np->s.timer);
1736
1737         /*
1738          * Reset NCR chip.
1739          * We should use sym_soft_reset(), but we don't want to do
1740          * so, since we may not be safe if interrupts occur.
1741          */
1742         printk("%s: resetting chip\n", sym_name(np));
1743         OUTB(np, nc_istat, SRST);
1744         INB(np, nc_mbox1);
1745         udelay(10);
1746         OUTB(np, nc_istat, 0);
1747
1748         sym_free_resources(np, pdev);
1749
1750         return 1;
1751 }
1752
1753 /*
1754  * Driver host template.
1755  */
1756 static struct scsi_host_template sym2_template = {
1757         .module                 = THIS_MODULE,
1758         .name                   = "sym53c8xx",
1759         .info                   = sym53c8xx_info,
1760         .queuecommand           = sym53c8xx_queue_command,
1761         .slave_alloc            = sym53c8xx_slave_alloc,
1762         .slave_configure        = sym53c8xx_slave_configure,
1763         .slave_destroy          = sym53c8xx_slave_destroy,
1764         .eh_abort_handler       = sym53c8xx_eh_abort_handler,
1765         .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1766         .eh_bus_reset_handler   = sym53c8xx_eh_bus_reset_handler,
1767         .eh_host_reset_handler  = sym53c8xx_eh_host_reset_handler,
1768         .this_id                = 7,
1769         .use_clustering         = ENABLE_CLUSTERING,
1770         .use_sg_chaining        = ENABLE_SG_CHAINING,
1771         .max_sectors            = 0xFFFF,
1772 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1773         .proc_info              = sym53c8xx_proc_info,
1774         .proc_name              = NAME53C8XX,
1775 #endif
1776 };
1777
1778 static int attach_count;
1779
1780 static int __devinit sym2_probe(struct pci_dev *pdev,
1781                                 const struct pci_device_id *ent)
1782 {
1783         struct sym_device sym_dev;
1784         struct sym_nvram nvram;
1785         struct Scsi_Host *instance;
1786
1787         memset(&sym_dev, 0, sizeof(sym_dev));
1788         memset(&nvram, 0, sizeof(nvram));
1789
1790         if (pci_enable_device(pdev))
1791                 goto leave;
1792
1793         pci_set_master(pdev);
1794
1795         if (pci_request_regions(pdev, NAME53C8XX))
1796                 goto disable;
1797
1798         sym_init_device(pdev, &sym_dev);
1799         if (sym_check_supported(&sym_dev))
1800                 goto free;
1801
1802         if (sym_check_raid(&sym_dev))
1803                 goto leave;     /* Don't disable the device */
1804
1805         if (sym_set_workarounds(&sym_dev))
1806                 goto free;
1807
1808         sym_config_pqs(pdev, &sym_dev);
1809
1810         sym_get_nvram(&sym_dev, &nvram);
1811
1812         instance = sym_attach(&sym2_template, attach_count, &sym_dev);
1813         if (!instance)
1814                 goto free;
1815
1816         if (scsi_add_host(instance, &pdev->dev))
1817                 goto detach;
1818         scsi_scan_host(instance);
1819
1820         attach_count++;
1821
1822         return 0;
1823
1824  detach:
1825         sym_detach(pci_get_drvdata(pdev), pdev);
1826  free:
1827         pci_release_regions(pdev);
1828  disable:
1829         pci_disable_device(pdev);
1830  leave:
1831         return -ENODEV;
1832 }
1833
1834 static void __devexit sym2_remove(struct pci_dev *pdev)
1835 {
1836         struct sym_hcb *np = pci_get_drvdata(pdev);
1837         struct Scsi_Host *host = np->s.host;
1838
1839         scsi_remove_host(host);
1840         scsi_host_put(host);
1841
1842         sym_detach(np, pdev);
1843
1844         pci_release_regions(pdev);
1845         pci_disable_device(pdev);
1846
1847         attach_count--;
1848 }
1849
1850 static void sym2_get_signalling(struct Scsi_Host *shost)
1851 {
1852         struct sym_hcb *np = sym_get_hcb(shost);
1853         enum spi_signal_type type;
1854
1855         switch (np->scsi_mode) {
1856         case SMODE_SE:
1857                 type = SPI_SIGNAL_SE;
1858                 break;
1859         case SMODE_LVD:
1860                 type = SPI_SIGNAL_LVD;
1861                 break;
1862         case SMODE_HVD:
1863                 type = SPI_SIGNAL_HVD;
1864                 break;
1865         default:
1866                 type = SPI_SIGNAL_UNKNOWN;
1867                 break;
1868         }
1869         spi_signalling(shost) = type;
1870 }
1871
1872 static void sym2_set_offset(struct scsi_target *starget, int offset)
1873 {
1874         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1875         struct sym_hcb *np = sym_get_hcb(shost);
1876         struct sym_tcb *tp = &np->target[starget->id];
1877
1878         tp->tgoal.offset = offset;
1879         tp->tgoal.check_nego = 1;
1880 }
1881
1882 static void sym2_set_period(struct scsi_target *starget, int period)
1883 {
1884         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1885         struct sym_hcb *np = sym_get_hcb(shost);
1886         struct sym_tcb *tp = &np->target[starget->id];
1887
1888         /* have to have DT for these transfers, but DT will also
1889          * set width, so check that this is allowed */
1890         if (period <= np->minsync && spi_width(starget))
1891                 tp->tgoal.dt = 1;
1892
1893         tp->tgoal.period = period;
1894         tp->tgoal.check_nego = 1;
1895 }
1896
1897 static void sym2_set_width(struct scsi_target *starget, int width)
1898 {
1899         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1900         struct sym_hcb *np = sym_get_hcb(shost);
1901         struct sym_tcb *tp = &np->target[starget->id];
1902
1903         /* It is illegal to have DT set on narrow transfers.  If DT is
1904          * clear, we must also clear IU and QAS.  */
1905         if (width == 0)
1906                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1907
1908         tp->tgoal.width = width;
1909         tp->tgoal.check_nego = 1;
1910 }
1911
1912 static void sym2_set_dt(struct scsi_target *starget, int dt)
1913 {
1914         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1915         struct sym_hcb *np = sym_get_hcb(shost);
1916         struct sym_tcb *tp = &np->target[starget->id];
1917
1918         /* We must clear QAS and IU if DT is clear */
1919         if (dt)
1920                 tp->tgoal.dt = 1;
1921         else
1922                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1923         tp->tgoal.check_nego = 1;
1924 }
1925
1926 #if 0
1927 static void sym2_set_iu(struct scsi_target *starget, int iu)
1928 {
1929         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1930         struct sym_hcb *np = sym_get_hcb(shost);
1931         struct sym_tcb *tp = &np->target[starget->id];
1932
1933         if (iu)
1934                 tp->tgoal.iu = tp->tgoal.dt = 1;
1935         else
1936                 tp->tgoal.iu = 0;
1937         tp->tgoal.check_nego = 1;
1938 }
1939
1940 static void sym2_set_qas(struct scsi_target *starget, int qas)
1941 {
1942         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1943         struct sym_hcb *np = sym_get_hcb(shost);
1944         struct sym_tcb *tp = &np->target[starget->id];
1945
1946         if (qas)
1947                 tp->tgoal.dt = tp->tgoal.qas = 1;
1948         else
1949                 tp->tgoal.qas = 0;
1950         tp->tgoal.check_nego = 1;
1951 }
1952 #endif
1953
1954 static struct spi_function_template sym2_transport_functions = {
1955         .set_offset     = sym2_set_offset,
1956         .show_offset    = 1,
1957         .set_period     = sym2_set_period,
1958         .show_period    = 1,
1959         .set_width      = sym2_set_width,
1960         .show_width     = 1,
1961         .set_dt         = sym2_set_dt,
1962         .show_dt        = 1,
1963 #if 0
1964         .set_iu         = sym2_set_iu,
1965         .show_iu        = 1,
1966         .set_qas        = sym2_set_qas,
1967         .show_qas       = 1,
1968 #endif
1969         .get_signalling = sym2_get_signalling,
1970 };
1971
1972 static struct pci_device_id sym2_id_table[] __devinitdata = {
1973         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
1974           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
1975         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
1976           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
1977         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
1978           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
1979         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
1980           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
1981         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
1982           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
1983         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
1984           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
1985         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
1986           PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL },
1987         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
1988           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
1989         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
1990           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
1991         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
1992           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
1993         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
1994           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
1995         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
1996           PCI_ANY_ID, PCI_ANY_ID,  PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL }, /* new */
1997         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
1998           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
1999         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2000           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2001         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2002           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2003         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2004           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2005         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2006           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2007         { 0, }
2008 };
2009
2010 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2011
2012 static struct pci_driver sym2_driver = {
2013         .name           = NAME53C8XX,
2014         .id_table       = sym2_id_table,
2015         .probe          = sym2_probe,
2016         .remove         = __devexit_p(sym2_remove),
2017 };
2018
2019 static int __init sym2_init(void)
2020 {
2021         int error;
2022
2023         sym2_setup_params();
2024         sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2025         if (!sym2_transport_template)
2026                 return -ENODEV;
2027
2028         error = pci_register_driver(&sym2_driver);
2029         if (error)
2030                 spi_release_transport(sym2_transport_template);
2031         return error;
2032 }
2033
2034 static void __exit sym2_exit(void)
2035 {
2036         pci_unregister_driver(&sym2_driver);
2037         spi_release_transport(sym2_transport_template);
2038 }
2039
2040 module_init(sym2_init);
2041 module_exit(sym2_exit);