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 static void sym_xpt_done2(struct sym_hcb *np, struct scsi_cmnd *cmd, int cam_status)
 155 {
 156         sym_set_cam_status(cmd, cam_status);
 157         sym_xpt_done(np, cmd);
 158 }
 159
 160
 161 /*
 162  *  Tell the SCSI layer about a BUS RESET.
 163  */
 164 void sym_xpt_async_bus_reset(struct sym_hcb *np)
 165 {
 166         printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
 167         np->s.settle_time = jiffies + sym_driver_setup.settle_delay * HZ;
 168         np->s.settle_time_valid = 1;
 169         if (sym_verbose >= 2)
 170                 printf_info("%s: command processing suspended for %d seconds\n",
 171                             sym_name(np), sym_driver_setup.settle_delay);
 172 }
 173
 174 /*
 175  *  Tell the SCSI layer about a BUS DEVICE RESET message sent.
 176  */
 177 void sym_xpt_async_sent_bdr(struct sym_hcb *np, int target)
 178 {
 179         printf_notice("%s: TARGET %d has been reset.\n", sym_name(np), target);
 180 }
 181
 182 /*
 183  *  Choose the more appropriate CAM status if
 184  *  the IO encountered an extended error.
 185  */
 186 static int sym_xerr_cam_status(int cam_status, int x_status)
 187 {
 188         if (x_status) {
 189                 if      (x_status & XE_PARITY_ERR)
 190                         cam_status = DID_PARITY;
 191                 else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN))
 192                         cam_status = DID_ERROR;
 193                 else if (x_status & XE_BAD_PHASE)
 194                         cam_status = DID_ERROR;
 195                 else
 196                         cam_status = DID_ERROR;
 197         }
 198         return cam_status;
 199 }
 200
 201 /*
 202  *  Build CAM result for a failed or auto-sensed IO.
 203  */
 204 void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid)
 205 {
 206         struct scsi_cmnd *cmd = cp->cmd;
 207         u_int cam_status, scsi_status, drv_status;
 208
 209         drv_status  = 0;
 210         cam_status  = DID_OK;
 211         scsi_status = cp->ssss_status;
 212
 213         if (cp->host_flags & HF_SENSE) {
 214                 scsi_status = cp->sv_scsi_status;
 215                 resid = cp->sv_resid;
 216                 if (sym_verbose && cp->sv_xerr_status)
 217                         sym_print_xerr(cmd, cp->sv_xerr_status);
 218                 if (cp->host_status == HS_COMPLETE &&
 219                     cp->ssss_status == S_GOOD &&
 220                     cp->xerr_status == 0) {
 221                         cam_status = sym_xerr_cam_status(DID_OK,
 222                                                          cp->sv_xerr_status);
 223                         drv_status = DRIVER_SENSE;
 224                         /*
 225                          *  Bounce back the sense data to user.
 226                          */
 227                         memset(&cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
 228                         memcpy(cmd->sense_buffer, cp->sns_bbuf,
 229                               min(sizeof(cmd->sense_buffer),
 230                                   (size_t)SYM_SNS_BBUF_LEN));
 231 #if 0
 232                         /*
 233                          *  If the device reports a UNIT ATTENTION condition
 234                          *  due to a RESET condition, we should consider all
 235                          *  disconnect CCBs for this unit as aborted.
 236                          */
 237                         if (1) {
 238                                 u_char *p;
 239                                 p  = (u_char *) cmd->sense_data;
 240                                 if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
 241                                         sym_clear_tasks(np, DID_ABORT,
 242                                                         cp->target,cp->lun, -1);
 243                         }
 244 #endif
 245                 } else {
 246                         /*
 247                          * Error return from our internal request sense.  This
 248                          * is bad: we must clear the contingent allegiance
 249                          * condition otherwise the device will always return
 250                          * BUSY.  Use a big stick.
 251                          */
 252                         sym_reset_scsi_target(np, cmd->device->id);
 253                         cam_status = DID_ERROR;
 254                 }
 255         } else if (cp->host_status == HS_COMPLETE)      /* Bad SCSI status */
 256                 cam_status = DID_OK;
 257         else if (cp->host_status == HS_SEL_TIMEOUT)     /* Selection timeout */
 258                 cam_status = DID_NO_CONNECT;
 259         else if (cp->host_status == HS_UNEXPECTED)      /* Unexpected BUS FREE*/
 260                 cam_status = DID_ERROR;
 261         else {                                          /* Extended error */
 262                 if (sym_verbose) {
 263                         sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
 264                                 cp->host_status, cp->ssss_status,
 265                                 cp->xerr_status);
 266                 }
 267                 /*
 268                  *  Set the most appropriate value for CAM status.
 269                  */
 270                 cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
 271         }
 272         scsi_set_resid(cmd, resid);
 273         cmd->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
 274 }
 275
 276 static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
 277 {
 278         int segment;
 279         int use_sg;
 280
 281         cp->data_len = 0;
 282
 283         use_sg = scsi_dma_map(cmd);
 284         if (use_sg > 0) {
 285                 struct scatterlist *sg;
 286                 struct sym_tcb *tp = &np->target[cp->target];
 287                 struct sym_tblmove *data;
 288
 289                 if (use_sg > SYM_CONF_MAX_SG) {
 290                         scsi_dma_unmap(cmd);
 291                         return -1;
 292                 }
 293
 294                 data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
 295
 296                 scsi_for_each_sg(cmd, sg, use_sg, segment) {
 297                         dma_addr_t baddr = sg_dma_address(sg);
 298                         unsigned int len = sg_dma_len(sg);
 299
 300                         if ((len & 1) && (tp->head.wval & EWS)) {
 301                                 len++;
 302                                 cp->odd_byte_adjustment++;
 303                         }
 304
 305                         sym_build_sge(np, &data[segment], baddr, len);
 306                         cp->data_len += len;
 307                 }
 308         } else {
 309                 segment = -2;
 310         }
 311
 312         return segment;
 313 }
 314
 315 /*
 316  *  Queue a SCSI command.
 317  */
 318 static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd)
 319 {
 320         struct scsi_device *sdev = cmd->device;
 321         struct sym_tcb *tp;
 322         struct sym_lcb *lp;
 323         struct sym_ccb *cp;
 324         int     order;
 325
 326         /*
 327          *  Minimal checkings, so that we will not
 328          *  go outside our tables.
 329          */
 330         if (sdev->id == np->myaddr) {
 331                 sym_xpt_done2(np, cmd, DID_NO_CONNECT);
 332                 return 0;
 333         }
 334
 335         /*
 336          *  Retrieve the target descriptor.
 337          */
 338         tp = &np->target[sdev->id];
 339
 340         /*
 341          *  Select tagged/untagged.
 342          */
 343         lp = sym_lp(tp, sdev->lun);
 344         order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
 345
 346         /*
 347          *  Queue the SCSI IO.
 348          */
 349         cp = sym_get_ccb(np, cmd, order);
 350         if (!cp)
 351                 return 1;       /* Means resource shortage */
 352         sym_queue_scsiio(np, cmd, cp);
 353         return 0;
 354 }
 355
 356 /*
 357  *  Setup buffers and pointers that address the CDB.
 358  */
 359 static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
 360 {
 361         memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len);
 362
 363         cp->phys.cmd.addr = CCB_BA(cp, cdb_buf[0]);
 364         cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
 365
 366         return 0;
 367 }
 368
 369 /*
 370  *  Setup pointers that address the data and start the I/O.
 371  */
 372 int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
 373 {
 374         u32 lastp, goalp;
 375         int dir;
 376
 377         /*
 378          *  Build the CDB.
 379          */
 380         if (sym_setup_cdb(np, cmd, cp))
 381                 goto out_abort;
 382
 383         /*
 384          *  No direction means no data.
 385          */
 386         dir = cmd->sc_data_direction;
 387         if (dir != DMA_NONE) {
 388                 cp->segments = sym_scatter(np, cp, cmd);
 389                 if (cp->segments < 0) {
 390                         sym_set_cam_status(cmd, DID_ERROR);
 391                         goto out_abort;
 392                 }
 393
 394                 /*
 395                  *  No segments means no data.
 396                  */
 397                 if (!cp->segments)
 398                         dir = DMA_NONE;
 399         } else {
 400                 cp->data_len = 0;
 401                 cp->segments = 0;
 402         }
 403
 404         /*
 405          *  Set the data pointer.
 406          */
 407         switch (dir) {
 408         case DMA_BIDIRECTIONAL:
 409                 printk("%s: got DMA_BIDIRECTIONAL command", sym_name(np));
 410                 sym_set_cam_status(cmd, DID_ERROR);
 411                 goto out_abort;
 412         case DMA_TO_DEVICE:
 413                 goalp = SCRIPTA_BA(np, data_out2) + 8;
 414                 lastp = goalp - 8 - (cp->segments * (2*4));
 415                 break;
 416         case DMA_FROM_DEVICE:
 417                 cp->host_flags |= HF_DATA_IN;
 418                 goalp = SCRIPTA_BA(np, data_in2) + 8;
 419                 lastp = goalp - 8 - (cp->segments * (2*4));
 420                 break;
 421         case DMA_NONE:
 422         default:
 423                 lastp = goalp = SCRIPTB_BA(np, no_data);
 424                 break;
 425         }
 426
 427         /*
 428          *  Set all pointers values needed by SCRIPTS.
 429          */
 430         cp->phys.head.lastp = cpu_to_scr(lastp);
 431         cp->phys.head.savep = cpu_to_scr(lastp);
 432         cp->startp          = cp->phys.head.savep;
 433         cp->goalp           = cpu_to_scr(goalp);
 434
 435         /*
 436          *  When `#ifed 1', the code below makes the driver
 437          *  panic on the first attempt to write to a SCSI device.
 438          *  It is the first test we want to do after a driver
 439          *  change that does not seem obviously safe. :)
 440          */
 441 #if 0
 442         switch (cp->cdb_buf[0]) {
 443         case 0x0A: case 0x2A: case 0xAA:
 444                 panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
 445                 break;
 446         default:
 447                 break;
 448         }
 449 #endif
 450
 451         /*
 452          *      activate this job.
 453          */
 454         sym_put_start_queue(np, cp);
 455         return 0;
 456
 457 out_abort:
 458         sym_free_ccb(np, cp);
 459         sym_xpt_done(np, cmd);
 460         return 0;
 461 }
 462
 463
 464 /*
 465  *  timer daemon.
 466  *
 467  *  Misused to keep the driver running when
 468  *  interrupts are not configured correctly.
 469  */
 470 static void sym_timer(struct sym_hcb *np)
 471 {
 472         unsigned long thistime = jiffies;
 473
 474         /*
 475          *  Restart the timer.
 476          */
 477         np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
 478         add_timer(&np->s.timer);
 479
 480         /*
 481          *  If we are resetting the ncr, wait for settle_time before
 482          *  clearing it. Then command processing will be resumed.
 483          */
 484         if (np->s.settle_time_valid) {
 485                 if (time_before_eq(np->s.settle_time, thistime)) {
 486                         if (sym_verbose >= 2 )
 487                                 printk("%s: command processing resumed\n",
 488                                        sym_name(np));
 489                         np->s.settle_time_valid = 0;
 490                 }
 491                 return;
 492         }
 493
 494         /*
 495          *      Nothing to do for now, but that may come.
 496          */
 497         if (np->s.lasttime + 4*HZ < thistime) {
 498                 np->s.lasttime = thistime;
 499         }
 500
 501 #ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
 502         /*
 503          *  Some way-broken PCI bridges may lead to
 504          *  completions being lost when the clearing
 505          *  of the INTFLY flag by the CPU occurs
 506          *  concurrently with the chip raising this flag.
 507          *  If this ever happen, lost completions will
 508          * be reaped here.
 509          */
 510         sym_wakeup_done(np);
 511 #endif
 512 }
 513
 514
 515 /*
 516  *  PCI BUS error handler.
 517  */
 518 void sym_log_bus_error(struct sym_hcb *np)
 519 {
 520         u_short pci_sts;
 521         pci_read_config_word(np->s.device, PCI_STATUS, &pci_sts);
 522         if (pci_sts & 0xf900) {
 523                 pci_write_config_word(np->s.device, PCI_STATUS, pci_sts);
 524                 printf("%s: PCI STATUS = 0x%04x\n",
 525                         sym_name(np), pci_sts & 0xf900);
 526         }
 527 }
 528
 529 /*
 530  * queuecommand method.  Entered with the host adapter lock held and
 531  * interrupts disabled.
 532  */
 533 static int sym53c8xx_queue_command(struct scsi_cmnd *cmd,
 534                                         void (*done)(struct scsi_cmnd *))
 535 {
 536         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
 537         struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
 538         int sts = 0;
 539
 540         cmd->scsi_done     = done;
 541         memset(ucp, 0, sizeof(*ucp));
 542
 543         /*
 544          *  Shorten our settle_time if needed for
 545          *  this command not to time out.
 546          */
 547         if (np->s.settle_time_valid && cmd->timeout_per_command) {
 548                 unsigned long tlimit = jiffies + cmd->timeout_per_command;
 549                 tlimit -= SYM_CONF_TIMER_INTERVAL*2;
 550                 if (time_after(np->s.settle_time, tlimit)) {
 551                         np->s.settle_time = tlimit;
 552                 }
 553         }
 554
 555         if (np->s.settle_time_valid)
 556                 return SCSI_MLQUEUE_HOST_BUSY;
 557
 558         sts = sym_queue_command(np, cmd);
 559         if (sts)
 560                 return SCSI_MLQUEUE_HOST_BUSY;
 561         return 0;
 562 }
 563
 564 /*
 565  *  Linux entry point of the interrupt handler.
 566  */
 567 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id)
 568 {
 569         unsigned long flags;
 570         struct sym_hcb *np = (struct sym_hcb *)dev_id;
 571
 572         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
 573
 574         spin_lock_irqsave(np->s.host->host_lock, flags);
 575         sym_interrupt(np);
 576         spin_unlock_irqrestore(np->s.host->host_lock, flags);
 577
 578         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
 579
 580         return IRQ_HANDLED;
 581 }
 582
 583 /*
 584  *  Linux entry point of the timer handler
 585  */
 586 static void sym53c8xx_timer(unsigned long npref)
 587 {
 588         struct sym_hcb *np = (struct sym_hcb *)npref;
 589         unsigned long flags;
 590
 591         spin_lock_irqsave(np->s.host->host_lock, flags);
 592         sym_timer(np);
 593         spin_unlock_irqrestore(np->s.host->host_lock, flags);
 594 }
 595
 596
 597 /*
 598  *  What the eh thread wants us to perform.
 599  */
 600 #define SYM_EH_ABORT            0
 601 #define SYM_EH_DEVICE_RESET     1
 602 #define SYM_EH_BUS_RESET        2
 603 #define SYM_EH_HOST_RESET       3
 604
 605 /*
 606  *  What we will do regarding the involved SCSI command.
 607  */
 608 #define SYM_EH_DO_IGNORE        0
 609 #define SYM_EH_DO_WAIT          2
 610
 611 /*
 612  *  scsi_done() alias when error recovery is in progress.
 613  */
 614 static void sym_eh_done(struct scsi_cmnd *cmd)
 615 {
 616         struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
 617         BUILD_BUG_ON(sizeof(struct scsi_pointer) < sizeof(struct sym_ucmd));
 618
 619         cmd->scsi_done = ucmd->old_done;
 620
 621         if (ucmd->to_do == SYM_EH_DO_WAIT)
 622                 complete(ucmd->eh_done);
 623 }
 624
 625 /*
 626  *  Generic method for our eh processing.
 627  *  The 'op' argument tells what we have to do.
 628  */
 629 static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
 630 {
 631         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
 632         struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
 633         struct Scsi_Host *host = cmd->device->host;
 634         SYM_QUEHEAD *qp;
 635         int to_do = SYM_EH_DO_IGNORE;
 636         int sts = -1;
 637         struct completion eh_done;
 638
 639         dev_warn(&cmd->device->sdev_gendev, "%s operation started.\n", opname);
 640
 641         spin_lock_irq(host->host_lock);
 642         /* This one is queued in some place -> to wait for completion */
 643         FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
 644                 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
 645                 if (cp->cmd == cmd) {
 646                         to_do = SYM_EH_DO_WAIT;
 647                         break;
 648                 }
 649         }
 650
 651         if (to_do == SYM_EH_DO_WAIT) {
 652                 init_completion(&eh_done);
 653                 ucmd->old_done = cmd->scsi_done;
 654                 ucmd->eh_done = &eh_done;
 655                 wmb();
 656                 cmd->scsi_done = sym_eh_done;
 657         }
 658
 659         /* Try to proceed the operation we have been asked for */
 660         sts = -1;
 661         switch(op) {
 662         case SYM_EH_ABORT:
 663                 sts = sym_abort_scsiio(np, cmd, 1);
 664                 break;
 665         case SYM_EH_DEVICE_RESET:
 666                 sts = sym_reset_scsi_target(np, cmd->device->id);
 667                 break;
 668         case SYM_EH_BUS_RESET:
 669                 sym_reset_scsi_bus(np, 1);
 670                 sts = 0;
 671                 break;
 672         case SYM_EH_HOST_RESET:
 673                 sym_reset_scsi_bus(np, 0);
 674                 sym_start_up (np, 1);
 675                 sts = 0;
 676                 break;
 677         default:
 678                 break;
 679         }
 680
 681         /* On error, restore everything and cross fingers :) */
 682         if (sts) {
 683                 cmd->scsi_done = ucmd->old_done;
 684                 to_do = SYM_EH_DO_IGNORE;
 685         }
 686
 687         ucmd->to_do = to_do;
 688         spin_unlock_irq(host->host_lock);
 689
 690         if (to_do == SYM_EH_DO_WAIT) {
 691                 if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
 692                         ucmd->to_do = SYM_EH_DO_IGNORE;
 693                         wmb();
 694                         sts = -2;
 695                 }
 696         }
 697         dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
 698                         sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
 699         return sts ? SCSI_FAILED : SCSI_SUCCESS;
 700 }
 701
 702
 703 /*
 704  * Error handlers called from the eh thread (one thread per HBA).
 705  */
 706 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
 707 {
 708         return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
 709 }
 710
 711 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
 712 {
 713         return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
 714 }
 715
 716 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
 717 {
 718         return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
 719 }
 720
 721 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
 722 {
 723         return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
 724 }
 725
 726 /*
 727  *  Tune device queuing depth, according to various limits.
 728  */
 729 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
 730 {
 731         struct sym_lcb *lp = sym_lp(tp, lun);
 732         u_short oldtags;
 733
 734         if (!lp)
 735                 return;
 736
 737         oldtags = lp->s.reqtags;
 738
 739         if (reqtags > lp->s.scdev_depth)
 740                 reqtags = lp->s.scdev_depth;
 741
 742         lp->s.reqtags     = reqtags;
 743
 744         if (reqtags != oldtags) {
 745                 dev_info(&tp->starget->dev,
 746                          "tagged command queuing %s, command queue depth %d.\n",
 747                           lp->s.reqtags ? "enabled" : "disabled", reqtags);
 748         }
 749 }
 750
 751 /*
 752  *  Linux select queue depths function
 753  */
 754 #define DEF_DEPTH       (sym_driver_setup.max_tag)
 755 #define ALL_TARGETS     -2
 756 #define NO_TARGET       -1
 757 #define ALL_LUNS        -2
 758 #define NO_LUN          -1
 759
 760 static int device_queue_depth(struct sym_hcb *np, int target, int lun)
 761 {
 762         int c, h, t, u, v;
 763         char *p = sym_driver_setup.tag_ctrl;
 764         char *ep;
 765
 766         h = -1;
 767         t = NO_TARGET;
 768         u = NO_LUN;
 769         while ((c = *p++) != 0) {
 770                 v = simple_strtoul(p, &ep, 0);
 771                 switch(c) {
 772                 case '/':
 773                         ++h;
 774                         t = ALL_TARGETS;
 775                         u = ALL_LUNS;
 776                         break;
 777                 case 't':
 778                         if (t != target)
 779                                 t = (target == v) ? v : NO_TARGET;
 780                         u = ALL_LUNS;
 781                         break;
 782                 case 'u':
 783                         if (u != lun)
 784                                 u = (lun == v) ? v : NO_LUN;
 785                         break;
 786                 case 'q':
 787                         if (h == np->s.unit &&
 788                                 (t == ALL_TARGETS || t == target) &&
 789                                 (u == ALL_LUNS    || u == lun))
 790                                 return v;
 791                         break;
 792                 case '-':
 793                         t = ALL_TARGETS;
 794                         u = ALL_LUNS;
 795                         break;
 796                 default:
 797                         break;
 798                 }
 799                 p = ep;
 800         }
 801         return DEF_DEPTH;
 802 }
 803
 804 static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
 805 {
 806         struct sym_hcb *np = sym_get_hcb(sdev->host);
 807         struct sym_tcb *tp = &np->target[sdev->id];
 808         struct sym_lcb *lp;
 809
 810         if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
 811                 return -ENXIO;
 812
 813         tp->starget = sdev->sdev_target;
 814         /*
 815          * Fail the device init if the device is flagged NOSCAN at BOOT in
 816          * the NVRAM.  This may speed up boot and maintain coherency with
 817          * BIOS device numbering.  Clearing the flag allows the user to
 818          * rescan skipped devices later.  We also return an error for
 819          * devices not flagged for SCAN LUNS in the NVRAM since some single
 820          * lun devices behave badly when asked for a non zero LUN.
 821          */
 822
 823         if (tp->usrflags & SYM_SCAN_BOOT_DISABLED) {
 824                 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
 825                 starget_printk(KERN_INFO, tp->starget,
 826                                 "Scan at boot disabled in NVRAM\n");
 827                 return -ENXIO;
 828         }
 829
 830         if (tp->usrflags & SYM_SCAN_LUNS_DISABLED) {
 831                 if (sdev->lun != 0)
 832                         return -ENXIO;
 833                 starget_printk(KERN_INFO, tp->starget,
 834                                 "Multiple LUNs disabled in NVRAM\n");
 835         }
 836
 837         lp = sym_alloc_lcb(np, sdev->id, sdev->lun);
 838         if (!lp)
 839                 return -ENOMEM;
 840
 841         spi_min_period(tp->starget) = tp->usr_period;
 842         spi_max_width(tp->starget) = tp->usr_width;
 843
 844         return 0;
 845 }
 846
 847 /*
 848  * Linux entry point for device queue sizing.
 849  */
 850 static int sym53c8xx_slave_configure(struct scsi_device *sdev)
 851 {
 852         struct sym_hcb *np = sym_get_hcb(sdev->host);
 853         struct sym_tcb *tp = &np->target[sdev->id];
 854         struct sym_lcb *lp = sym_lp(tp, sdev->lun);
 855         int reqtags, depth_to_use;
 856
 857         /*
 858          *  Get user flags.
 859          */
 860         lp->curr_flags = lp->user_flags;
 861
 862         /*
 863          *  Select queue depth from driver setup.
 864          *  Donnot use more than configured by user.
 865          *  Use at least 2.
 866          *  Donnot use more than our maximum.
 867          */
 868         reqtags = device_queue_depth(np, sdev->id, sdev->lun);
 869         if (reqtags > tp->usrtags)
 870                 reqtags = tp->usrtags;
 871         if (!sdev->tagged_supported)
 872                 reqtags = 0;
 873 #if 1 /* Avoid to locally queue commands for no good reasons */
 874         if (reqtags > SYM_CONF_MAX_TAG)
 875                 reqtags = SYM_CONF_MAX_TAG;
 876         depth_to_use = (reqtags ? reqtags : 2);
 877 #else
 878         depth_to_use = (reqtags ? SYM_CONF_MAX_TAG : 2);
 879 #endif
 880         scsi_adjust_queue_depth(sdev,
 881                                 (sdev->tagged_supported ?
 882                                  MSG_SIMPLE_TAG : 0),
 883                                 depth_to_use);
 884         lp->s.scdev_depth = depth_to_use;
 885         sym_tune_dev_queuing(tp, sdev->lun, reqtags);
 886
 887         if (!spi_initial_dv(sdev->sdev_target))
 888                 spi_dv_device(sdev);
 889
 890         return 0;
 891 }
 892
 893 static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
 894 {
 895         struct sym_hcb *np = sym_get_hcb(sdev->host);
 896         struct sym_lcb *lp = sym_lp(&np->target[sdev->id], sdev->lun);
 897
 898         if (lp->itlq_tbl)
 899                 sym_mfree_dma(lp->itlq_tbl, SYM_CONF_MAX_TASK * 4, "ITLQ_TBL");
 900         kfree(lp->cb_tags);
 901         sym_mfree_dma(lp, sizeof(*lp), "LCB");
 902 }
 903
 904 /*
 905  *  Linux entry point for info() function
 906  */
 907 static const char *sym53c8xx_info (struct Scsi_Host *host)
 908 {
 909         return SYM_DRIVER_NAME;
 910 }
 911
 912
 913 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
 914 /*
 915  *  Proc file system stuff
 916  *
 917  *  A read operation returns adapter information.
 918  *  A write operation is a control command.
 919  *  The string is parsed in the driver code and the command is passed
 920  *  to the sym_usercmd() function.
 921  */
 922
 923 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
 924
 925 struct  sym_usrcmd {
 926         u_long  target;
 927         u_long  lun;
 928         u_long  data;
 929         u_long  cmd;
 930 };
 931
 932 #define UC_SETSYNC      10
 933 #define UC_SETTAGS      11
 934 #define UC_SETDEBUG     12
 935 #define UC_SETWIDE      14
 936 #define UC_SETFLAG      15
 937 #define UC_SETVERBOSE   17
 938 #define UC_RESETDEV     18
 939 #define UC_CLEARDEV     19
 940
 941 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
 942 {
 943         struct sym_tcb *tp;
 944         int t, l;
 945
 946         switch (uc->cmd) {
 947         case 0: return;
 948
 949 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
 950         case UC_SETDEBUG:
 951                 sym_debug_flags = uc->data;
 952                 break;
 953 #endif
 954         case UC_SETVERBOSE:
 955                 np->verbose = uc->data;
 956                 break;
 957         default:
 958                 /*
 959                  * We assume that other commands apply to targets.
 960                  * This should always be the case and avoid the below
 961                  * 4 lines to be repeated 6 times.
 962                  */
 963                 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
 964                         if (!((uc->target >> t) & 1))
 965                                 continue;
 966                         tp = &np->target[t];
 967
 968                         switch (uc->cmd) {
 969
 970                         case UC_SETSYNC:
 971                                 if (!uc->data || uc->data >= 255) {
 972                                         tp->tgoal.iu = tp->tgoal.dt =
 973                                                 tp->tgoal.qas = 0;
 974                                         tp->tgoal.offset = 0;
 975                                 } else if (uc->data <= 9 && np->minsync_dt) {
 976                                         if (uc->data < np->minsync_dt)
 977                                                 uc->data = np->minsync_dt;
 978                                         tp->tgoal.iu = tp->tgoal.dt =
 979                                                 tp->tgoal.qas = 1;
 980                                         tp->tgoal.width = 1;
 981                                         tp->tgoal.period = uc->data;
 982                                         tp->tgoal.offset = np->maxoffs_dt;
 983                                 } else {
 984                                         if (uc->data < np->minsync)
 985                                                 uc->data = np->minsync;
 986                                         tp->tgoal.iu = tp->tgoal.dt =
 987                                                 tp->tgoal.qas = 0;
 988                                         tp->tgoal.period = uc->data;
 989                                         tp->tgoal.offset = np->maxoffs;
 990                                 }
 991                                 tp->tgoal.check_nego = 1;
 992                                 break;
 993                         case UC_SETWIDE:
 994                                 tp->tgoal.width = uc->data ? 1 : 0;
 995                                 tp->tgoal.check_nego = 1;
 996                                 break;
 997                         case UC_SETTAGS:
 998                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
 999                                         sym_tune_dev_queuing(tp, l, uc->data);
1000                                 break;
1001                         case UC_RESETDEV:
1002                                 tp->to_reset = 1;
1003                                 np->istat_sem = SEM;
1004                                 OUTB(np, nc_istat, SIGP|SEM);
1005                                 break;
1006                         case UC_CLEARDEV:
1007                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
1008                                         struct sym_lcb *lp = sym_lp(tp, l);
1009                                         if (lp) lp->to_clear = 1;
1010                                 }
1011                                 np->istat_sem = SEM;
1012                                 OUTB(np, nc_istat, SIGP|SEM);
1013                                 break;
1014                         case UC_SETFLAG:
1015                                 tp->usrflags = uc->data;
1016                                 break;
1017                         }
1018                 }
1019                 break;
1020         }
1021 }
1022
1023 static int skip_spaces(char *ptr, int len)
1024 {
1025         int cnt, c;
1026
1027         for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
1028
1029         return (len - cnt);
1030 }
1031
1032 static int get_int_arg(char *ptr, int len, u_long *pv)
1033 {
1034         char *end;
1035
1036         *pv = simple_strtoul(ptr, &end, 10);
1037         return (end - ptr);
1038 }
1039
1040 static int is_keyword(char *ptr, int len, char *verb)
1041 {
1042         int verb_len = strlen(verb);
1043
1044         if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1045                 return verb_len;
1046         else
1047                 return 0;
1048 }
1049
1050 #define SKIP_SPACES(ptr, len)                                           \
1051         if ((arg_len = skip_spaces(ptr, len)) < 1)                      \
1052                 return -EINVAL;                                         \
1053         ptr += arg_len; len -= arg_len;
1054
1055 #define GET_INT_ARG(ptr, len, v)                                        \
1056         if (!(arg_len = get_int_arg(ptr, len, &(v))))                   \
1057                 return -EINVAL;                                         \
1058         ptr += arg_len; len -= arg_len;
1059
1060
1061 /*
1062  * Parse a control command
1063  */
1064
1065 static int sym_user_command(struct sym_hcb *np, char *buffer, int length)
1066 {
1067         char *ptr       = buffer;
1068         int len         = length;
1069         struct sym_usrcmd cmd, *uc = &cmd;
1070         int             arg_len;
1071         u_long          target;
1072
1073         memset(uc, 0, sizeof(*uc));
1074
1075         if (len > 0 && ptr[len-1] == '\n')
1076                 --len;
1077
1078         if      ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1079                 uc->cmd = UC_SETSYNC;
1080         else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1081                 uc->cmd = UC_SETTAGS;
1082         else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1083                 uc->cmd = UC_SETVERBOSE;
1084         else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1085                 uc->cmd = UC_SETWIDE;
1086 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1087         else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1088                 uc->cmd = UC_SETDEBUG;
1089 #endif
1090         else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1091                 uc->cmd = UC_SETFLAG;
1092         else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1093                 uc->cmd = UC_RESETDEV;
1094         else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1095                 uc->cmd = UC_CLEARDEV;
1096         else
1097                 arg_len = 0;
1098
1099 #ifdef DEBUG_PROC_INFO
1100 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1101 #endif
1102
1103         if (!arg_len)
1104                 return -EINVAL;
1105         ptr += arg_len; len -= arg_len;
1106
1107         switch(uc->cmd) {
1108         case UC_SETSYNC:
1109         case UC_SETTAGS:
1110         case UC_SETWIDE:
1111         case UC_SETFLAG:
1112         case UC_RESETDEV:
1113         case UC_CLEARDEV:
1114                 SKIP_SPACES(ptr, len);
1115                 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1116                         ptr += arg_len; len -= arg_len;
1117                         uc->target = ~0;
1118                 } else {
1119                         GET_INT_ARG(ptr, len, target);
1120                         uc->target = (1<<target);
1121 #ifdef DEBUG_PROC_INFO
1122 printk("sym_user_command: target=%ld\n", target);
1123 #endif
1124                 }
1125                 break;
1126         }
1127
1128         switch(uc->cmd) {
1129         case UC_SETVERBOSE:
1130         case UC_SETSYNC:
1131         case UC_SETTAGS:
1132         case UC_SETWIDE:
1133                 SKIP_SPACES(ptr, len);
1134                 GET_INT_ARG(ptr, len, uc->data);
1135 #ifdef DEBUG_PROC_INFO
1136 printk("sym_user_command: data=%ld\n", uc->data);
1137 #endif
1138                 break;
1139 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1140         case UC_SETDEBUG:
1141                 while (len > 0) {
1142                         SKIP_SPACES(ptr, len);
1143                         if      ((arg_len = is_keyword(ptr, len, "alloc")))
1144                                 uc->data |= DEBUG_ALLOC;
1145                         else if ((arg_len = is_keyword(ptr, len, "phase")))
1146                                 uc->data |= DEBUG_PHASE;
1147                         else if ((arg_len = is_keyword(ptr, len, "queue")))
1148                                 uc->data |= DEBUG_QUEUE;
1149                         else if ((arg_len = is_keyword(ptr, len, "result")))
1150                                 uc->data |= DEBUG_RESULT;
1151                         else if ((arg_len = is_keyword(ptr, len, "scatter")))
1152                                 uc->data |= DEBUG_SCATTER;
1153                         else if ((arg_len = is_keyword(ptr, len, "script")))
1154                                 uc->data |= DEBUG_SCRIPT;
1155                         else if ((arg_len = is_keyword(ptr, len, "tiny")))
1156                                 uc->data |= DEBUG_TINY;
1157                         else if ((arg_len = is_keyword(ptr, len, "timing")))
1158                                 uc->data |= DEBUG_TIMING;
1159                         else if ((arg_len = is_keyword(ptr, len, "nego")))
1160                                 uc->data |= DEBUG_NEGO;
1161                         else if ((arg_len = is_keyword(ptr, len, "tags")))
1162                                 uc->data |= DEBUG_TAGS;
1163                         else if ((arg_len = is_keyword(ptr, len, "pointer")))
1164                                 uc->data |= DEBUG_POINTER;
1165                         else
1166                                 return -EINVAL;
1167                         ptr += arg_len; len -= arg_len;
1168                 }
1169 #ifdef DEBUG_PROC_INFO
1170 printk("sym_user_command: data=%ld\n", uc->data);
1171 #endif
1172                 break;
1173 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1174         case UC_SETFLAG:
1175                 while (len > 0) {
1176                         SKIP_SPACES(ptr, len);
1177                         if      ((arg_len = is_keyword(ptr, len, "no_disc")))
1178                                 uc->data &= ~SYM_DISC_ENABLED;
1179                         else
1180                                 return -EINVAL;
1181                         ptr += arg_len; len -= arg_len;
1182                 }
1183                 break;
1184         default:
1185                 break;
1186         }
1187
1188         if (len)
1189                 return -EINVAL;
1190         else {
1191                 unsigned long flags;
1192
1193                 spin_lock_irqsave(np->s.host->host_lock, flags);
1194                 sym_exec_user_command (np, uc);
1195                 spin_unlock_irqrestore(np->s.host->host_lock, flags);
1196         }
1197         return length;
1198 }
1199
1200 #endif  /* SYM_LINUX_USER_COMMAND_SUPPORT */
1201
1202
1203 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1204 /*
1205  *  Informations through the proc file system.
1206  */
1207 struct info_str {
1208         char *buffer;
1209         int length;
1210         int offset;
1211         int pos;
1212 };
1213
1214 static void copy_mem_info(struct info_str *info, char *data, int len)
1215 {
1216         if (info->pos + len > info->length)
1217                 len = info->length - info->pos;
1218
1219         if (info->pos + len < info->offset) {
1220                 info->pos += len;
1221                 return;
1222         }
1223         if (info->pos < info->offset) {
1224                 data += (info->offset - info->pos);
1225                 len  -= (info->offset - info->pos);
1226         }
1227
1228         if (len > 0) {
1229                 memcpy(info->buffer + info->pos, data, len);
1230                 info->pos += len;
1231         }
1232 }
1233
1234 static int copy_info(struct info_str *info, char *fmt, ...)
1235 {
1236         va_list args;
1237         char buf[81];
1238         int len;
1239
1240         va_start(args, fmt);
1241         len = vsprintf(buf, fmt, args);
1242         va_end(args);
1243
1244         copy_mem_info(info, buf, len);
1245         return len;
1246 }
1247
1248 /*
1249  *  Copy formatted information into the input buffer.
1250  */
1251 static int sym_host_info(struct sym_hcb *np, char *ptr, off_t offset, int len)
1252 {
1253         struct info_str info;
1254
1255         info.buffer     = ptr;
1256         info.length     = len;
1257         info.offset     = offset;
1258         info.pos        = 0;
1259
1260         copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1261                          "revision id 0x%x\n",
1262                          np->s.chip_name, np->device_id, np->revision_id);
1263         copy_info(&info, "At PCI address %s, IRQ " IRQ_FMT "\n",
1264                 pci_name(np->s.device), IRQ_PRM(np->s.device->irq));
1265         copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1266                          (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1267                          np->maxwide ? "Wide" : "Narrow",
1268                          np->minsync_dt ? ", DT capable" : "");
1269
1270         copy_info(&info, "Max. started commands %d, "
1271                          "max. commands per LUN %d\n",
1272                          SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1273
1274         return info.pos > info.offset? info.pos - info.offset : 0;
1275 }
1276 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1277
1278 /*
1279  *  Entry point of the scsi proc fs of the driver.
1280  *  - func = 0 means read  (returns adapter infos)
1281  *  - func = 1 means write (not yet merget from sym53c8xx)
1282  */
1283 static int sym53c8xx_proc_info(struct Scsi_Host *host, char *buffer,
1284                         char **start, off_t offset, int length, int func)
1285 {
1286         struct sym_hcb *np = sym_get_hcb(host);
1287         int retv;
1288
1289         if (func) {
1290 #ifdef  SYM_LINUX_USER_COMMAND_SUPPORT
1291                 retv = sym_user_command(np, buffer, length);
1292 #else
1293                 retv = -EINVAL;
1294 #endif
1295         } else {
1296                 if (start)
1297                         *start = buffer;
1298 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1299                 retv = sym_host_info(np, buffer, offset, length);
1300 #else
1301                 retv = -EINVAL;
1302 #endif
1303         }
1304
1305         return retv;
1306 }
1307 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1308
1309 /*
1310  *      Free controller resources.
1311  */
1312 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev)
1313 {
1314         /*
1315          *  Free O/S specific resources.
1316          */
1317         if (pdev->irq)
1318                 free_irq(pdev->irq, np);
1319         if (np->s.ioaddr)
1320                 pci_iounmap(pdev, np->s.ioaddr);
1321         if (np->s.ramaddr)
1322                 pci_iounmap(pdev, np->s.ramaddr);
1323         /*
1324          *  Free O/S independent resources.
1325          */
1326         sym_hcb_free(np);
1327
1328         sym_mfree_dma(np, sizeof(*np), "HCB");
1329 }
1330
1331 /*
1332  *  Ask/tell the system about DMA addressing.
1333  */
1334 static int sym_setup_bus_dma_mask(struct sym_hcb *np)
1335 {
1336 #if SYM_CONF_DMA_ADDRESSING_MODE > 0
1337 #if   SYM_CONF_DMA_ADDRESSING_MODE == 1
1338 #define DMA_DAC_MASK    DMA_40BIT_MASK
1339 #elif SYM_CONF_DMA_ADDRESSING_MODE == 2
1340 #define DMA_DAC_MASK    DMA_64BIT_MASK
1341 #endif
1342         if ((np->features & FE_DAC) &&
1343                         !pci_set_dma_mask(np->s.device, DMA_DAC_MASK)) {
1344                 np->use_dac = 1;
1345                 return 0;
1346         }
1347 #endif
1348
1349         if (!pci_set_dma_mask(np->s.device, DMA_32BIT_MASK))
1350                 return 0;
1351
1352         printf_warning("%s: No suitable DMA available\n", sym_name(np));
1353         return -1;
1354 }
1355
1356 /*
1357  *  Host attach and initialisations.
1358  *
1359  *  Allocate host data and ncb structure.
1360  *  Remap MMIO region.
1361  *  Do chip initialization.
1362  *  If all is OK, install interrupt handling and
1363  *  start the timer daemon.
1364  */
1365 static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1366                 int unit, struct sym_device *dev)
1367 {
1368         struct host_data *host_data;
1369         struct sym_hcb *np = NULL;
1370         struct Scsi_Host *instance = NULL;
1371         struct pci_dev *pdev = dev->pdev;
1372         unsigned long flags;
1373         struct sym_fw *fw;
1374
1375         printk(KERN_INFO
1376                 "sym%d: <%s> rev 0x%x at pci %s irq " IRQ_FMT "\n",
1377                 unit, dev->chip.name, dev->chip.revision_id,
1378                 pci_name(pdev), IRQ_PRM(pdev->irq));
1379
1380         /*
1381          *  Get the firmware for this chip.
1382          */
1383         fw = sym_find_firmware(&dev->chip);
1384         if (!fw)
1385                 goto attach_failed;
1386
1387         /*
1388          *      Allocate host_data structure
1389          */
1390         instance = scsi_host_alloc(tpnt, sizeof(*host_data));
1391         if (!instance)
1392                 goto attach_failed;
1393         host_data = (struct host_data *) instance->hostdata;
1394
1395         /*
1396          *  Allocate immediately the host control block,
1397          *  since we are only expecting to succeed. :)
1398          *  We keep track in the HCB of all the resources that
1399          *  are to be released on error.
1400          */
1401         np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1402         if (!np)
1403                 goto attach_failed;
1404         np->s.device = pdev;
1405         np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1406         host_data->ncb = np;
1407         np->s.host = instance;
1408
1409         pci_set_drvdata(pdev, np);
1410
1411         /*
1412          *  Copy some useful infos to the HCB.
1413          */
1414         np->hcb_ba      = vtobus(np);
1415         np->verbose     = sym_driver_setup.verbose;
1416         np->s.device    = pdev;
1417         np->s.unit      = unit;
1418         np->device_id   = dev->chip.device_id;
1419         np->revision_id = dev->chip.revision_id;
1420         np->features    = dev->chip.features;
1421         np->clock_divn  = dev->chip.nr_divisor;
1422         np->maxoffs     = dev->chip.offset_max;
1423         np->maxburst    = dev->chip.burst_max;
1424         np->myaddr      = dev->host_id;
1425
1426         /*
1427          *  Edit its name.
1428          */
1429         strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1430         sprintf(np->s.inst_name, "sym%d", np->s.unit);
1431
1432         if (sym_setup_bus_dma_mask(np))
1433                 goto attach_failed;
1434
1435         /*
1436          *  Try to map the controller chip to
1437          *  virtual and physical memory.
1438          */
1439         np->mmio_ba = (u32)dev->mmio_base;
1440         np->s.ioaddr    = dev->s.ioaddr;
1441         np->s.ramaddr   = dev->s.ramaddr;
1442         np->s.io_ws = (np->features & FE_IO256) ? 256 : 128;
1443
1444         /*
1445          *  Map on-chip RAM if present and supported.
1446          */
1447         if (!(np->features & FE_RAM))
1448                 dev->ram_base = 0;
1449         if (dev->ram_base) {
1450                 np->ram_ba = (u32)dev->ram_base;
1451                 np->ram_ws = (np->features & FE_RAM8K) ? 8192 : 4096;
1452         }
1453
1454         if (sym_hcb_attach(instance, fw, dev->nvram))
1455                 goto attach_failed;
1456
1457         /*
1458          *  Install the interrupt handler.
1459          *  If we synchonize the C code with SCRIPTS on interrupt,
1460          *  we do not want to share the INTR line at all.
1461          */
1462         if (request_irq(pdev->irq, sym53c8xx_intr, IRQF_SHARED, NAME53C8XX, np)) {
1463                 printf_err("%s: request irq %d failure\n",
1464                         sym_name(np), pdev->irq);
1465                 goto attach_failed;
1466         }
1467
1468         /*
1469          *  After SCSI devices have been opened, we cannot
1470          *  reset the bus safely, so we do it here.
1471          */
1472         spin_lock_irqsave(instance->host_lock, flags);
1473         if (sym_reset_scsi_bus(np, 0))
1474                 goto reset_failed;
1475
1476         /*
1477          *  Start the SCRIPTS.
1478          */
1479         sym_start_up (np, 1);
1480
1481         /*
1482          *  Start the timer daemon
1483          */
1484         init_timer(&np->s.timer);
1485         np->s.timer.data     = (unsigned long) np;
1486         np->s.timer.function = sym53c8xx_timer;
1487         np->s.lasttime=0;
1488         sym_timer (np);
1489
1490         /*
1491          *  Fill Linux host instance structure
1492          *  and return success.
1493          */
1494         instance->max_channel   = 0;
1495         instance->this_id       = np->myaddr;
1496         instance->max_id        = np->maxwide ? 16 : 8;
1497         instance->max_lun       = SYM_CONF_MAX_LUN;
1498         instance->unique_id     = pci_resource_start(pdev, 0);
1499         instance->cmd_per_lun   = SYM_CONF_MAX_TAG;
1500         instance->can_queue     = (SYM_CONF_MAX_START-2);
1501         instance->sg_tablesize  = SYM_CONF_MAX_SG;
1502         instance->max_cmd_len   = 16;
1503         BUG_ON(sym2_transport_template == NULL);
1504         instance->transportt    = sym2_transport_template;
1505
1506         /* 53c896 rev 1 errata: DMA may not cross 16MB boundary */
1507         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && np->revision_id < 2)
1508                 instance->dma_boundary = 0xFFFFFF;
1509
1510         spin_unlock_irqrestore(instance->host_lock, flags);
1511
1512         return instance;
1513
1514  reset_failed:
1515         printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1516                    "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1517         spin_unlock_irqrestore(instance->host_lock, flags);
1518  attach_failed:
1519         if (!instance)
1520                 return NULL;
1521         printf_info("%s: giving up ...\n", sym_name(np));
1522         if (np)
1523                 sym_free_resources(np, pdev);
1524         scsi_host_put(instance);
1525
1526         return NULL;
1527  }
1528
1529
1530 /*
1531  *    Detect and try to read SYMBIOS and TEKRAM NVRAM.
1532  */
1533 #if SYM_CONF_NVRAM_SUPPORT
1534 static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1535 {
1536         devp->nvram = nvp;
1537         devp->device_id = devp->chip.device_id;
1538         nvp->type = 0;
1539
1540         sym_read_nvram(devp, nvp);
1541 }
1542 #else
1543 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1544 {
1545 }
1546 #endif  /* SYM_CONF_NVRAM_SUPPORT */
1547
1548 static int __devinit sym_check_supported(struct sym_device *device)
1549 {
1550         struct sym_chip *chip;
1551         struct pci_dev *pdev = device->pdev;
1552         u_char revision;
1553         unsigned long io_port = pci_resource_start(pdev, 0);
1554         int i;
1555
1556         /*
1557          *  If user excluded this chip, do not initialize it.
1558          *  I hate this code so much.  Must kill it.
1559          */
1560         if (io_port) {
1561                 for (i = 0 ; i < 8 ; i++) {
1562                         if (sym_driver_setup.excludes[i] == io_port)
1563                                 return -ENODEV;
1564                 }
1565         }
1566
1567         /*
1568          * Check if the chip is supported.  Then copy the chip description
1569          * to our device structure so we can make it match the actual device
1570          * and options.
1571          */
1572         pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
1573         chip = sym_lookup_chip_table(pdev->device, revision);
1574         if (!chip) {
1575                 dev_info(&pdev->dev, "device not supported\n");
1576                 return -ENODEV;
1577         }
1578         memcpy(&device->chip, chip, sizeof(device->chip));
1579         device->chip.revision_id = revision;
1580
1581         return 0;
1582 }
1583
1584 /*
1585  * Ignore Symbios chips controlled by various RAID controllers.
1586  * These controllers set value 0x52414944 at RAM end - 16.
1587  */
1588 static int __devinit sym_check_raid(struct sym_device *device)
1589 {
1590         unsigned int ram_size, ram_val;
1591
1592         if (!device->s.ramaddr)
1593                 return 0;
1594
1595         if (device->chip.features & FE_RAM8K)
1596                 ram_size = 8192;
1597         else
1598                 ram_size = 4096;
1599
1600         ram_val = readl(device->s.ramaddr + ram_size - 16);
1601         if (ram_val != 0x52414944)
1602                 return 0;
1603
1604         dev_info(&device->pdev->dev,
1605                         "not initializing, driven by RAID controller.\n");
1606         return -ENODEV;
1607 }
1608
1609 static int __devinit sym_set_workarounds(struct sym_device *device)
1610 {
1611         struct sym_chip *chip = &device->chip;
1612         struct pci_dev *pdev = device->pdev;
1613         u_short status_reg;
1614
1615         /*
1616          *  (ITEM 12 of a DEL about the 896 I haven't yet).
1617          *  We must ensure the chip will use WRITE AND INVALIDATE.
1618          *  The revision number limit is for now arbitrary.
1619          */
1620         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && chip->revision_id < 0x4) {
1621                 chip->features  |= (FE_WRIE | FE_CLSE);
1622         }
1623
1624         /* If the chip can do Memory Write Invalidate, enable it */
1625         if (chip->features & FE_WRIE) {
1626                 if (pci_set_mwi(pdev))
1627                         return -ENODEV;
1628         }
1629
1630         /*
1631          *  Work around for errant bit in 895A. The 66Mhz
1632          *  capable bit is set erroneously. Clear this bit.
1633          *  (Item 1 DEL 533)
1634          *
1635          *  Make sure Config space and Features agree.
1636          *
1637          *  Recall: writes are not normal to status register -
1638          *  write a 1 to clear and a 0 to leave unchanged.
1639          *  Can only reset bits.
1640          */
1641         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1642         if (chip->features & FE_66MHZ) {
1643                 if (!(status_reg & PCI_STATUS_66MHZ))
1644                         chip->features &= ~FE_66MHZ;
1645         } else {
1646                 if (status_reg & PCI_STATUS_66MHZ) {
1647                         status_reg = PCI_STATUS_66MHZ;
1648                         pci_write_config_word(pdev, PCI_STATUS, status_reg);
1649                         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1650                 }
1651         }
1652
1653         return 0;
1654 }
1655
1656 /*
1657  *  Read and check the PCI configuration for any detected NCR
1658  *  boards and save data for attaching after all boards have
1659  *  been detected.
1660  */
1661 static void __devinit
1662 sym_init_device(struct pci_dev *pdev, struct sym_device *device)
1663 {
1664         int i = 2;
1665         struct pci_bus_region bus_addr;
1666
1667         device->host_id = SYM_SETUP_HOST_ID;
1668         device->pdev = pdev;
1669
1670         pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[1]);
1671         device->mmio_base = bus_addr.start;
1672
1673         /*
1674          * If the BAR is 64-bit, resource 2 will be occupied by the
1675          * upper 32 bits
1676          */
1677         if (!pdev->resource[i].flags)
1678                 i++;
1679         pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[i]);
1680         device->ram_base = bus_addr.start;
1681
1682 #ifdef CONFIG_SCSI_SYM53C8XX_MMIO
1683         if (device->mmio_base)
1684                 device->s.ioaddr = pci_iomap(pdev, 1,
1685                                                 pci_resource_len(pdev, 1));
1686 #endif
1687         if (!device->s.ioaddr)
1688                 device->s.ioaddr = pci_iomap(pdev, 0,
1689                                                 pci_resource_len(pdev, 0));
1690         if (device->ram_base)
1691                 device->s.ramaddr = pci_iomap(pdev, i,
1692                                                 pci_resource_len(pdev, i));
1693 }
1694
1695 /*
1696  * The NCR PQS and PDS cards are constructed as a DEC bridge
1697  * behind which sits a proprietary NCR memory controller and
1698  * either four or two 53c875s as separate devices.  We can tell
1699  * if an 875 is part of a PQS/PDS or not since if it is, it will
1700  * be on the same bus as the memory controller.  In its usual
1701  * mode of operation, the 875s are slaved to the memory
1702  * controller for all transfers.  To operate with the Linux
1703  * driver, the memory controller is disabled and the 875s
1704  * freed to function independently.  The only wrinkle is that
1705  * the preset SCSI ID (which may be zero) must be read in from
1706  * a special configuration space register of the 875.
1707  */
1708 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1709 {
1710         int slot;
1711         u8 tmp;
1712
1713         for (slot = 0; slot < 256; slot++) {
1714                 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1715
1716                 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1717                         pci_dev_put(memc);
1718                         continue;
1719                 }
1720
1721                 /* bit 1: allow individual 875 configuration */
1722                 pci_read_config_byte(memc, 0x44, &tmp);
1723                 if ((tmp & 0x2) == 0) {
1724                         tmp |= 0x2;
1725                         pci_write_config_byte(memc, 0x44, tmp);
1726                 }
1727
1728                 /* bit 2: drive individual 875 interrupts to the bus */
1729                 pci_read_config_byte(memc, 0x45, &tmp);
1730                 if ((tmp & 0x4) == 0) {
1731                         tmp |= 0x4;
1732                         pci_write_config_byte(memc, 0x45, tmp);
1733                 }
1734
1735                 pci_dev_put(memc);
1736                 break;
1737         }
1738
1739         pci_read_config_byte(pdev, 0x84, &tmp);
1740         sym_dev->host_id = tmp;
1741 }
1742
1743 /*
1744  *  Called before unloading the module.
1745  *  Detach the host.
1746  *  We have to free resources and halt the NCR chip.
1747  */
1748 static int sym_detach(struct sym_hcb *np, struct pci_dev *pdev)
1749 {
1750         printk("%s: detaching ...\n", sym_name(np));
1751
1752         del_timer_sync(&np->s.timer);
1753
1754         /*
1755          * Reset NCR chip.
1756          * We should use sym_soft_reset(), but we don't want to do
1757          * so, since we may not be safe if interrupts occur.
1758          */
1759         printk("%s: resetting chip\n", sym_name(np));
1760         OUTB(np, nc_istat, SRST);
1761         INB(np, nc_mbox1);
1762         udelay(10);
1763         OUTB(np, nc_istat, 0);
1764
1765         sym_free_resources(np, pdev);
1766
1767         return 1;
1768 }
1769
1770 /*
1771  * Driver host template.
1772  */
1773 static struct scsi_host_template sym2_template = {
1774         .module                 = THIS_MODULE,
1775         .name                   = "sym53c8xx",
1776         .info                   = sym53c8xx_info,
1777         .queuecommand           = sym53c8xx_queue_command,
1778         .slave_alloc            = sym53c8xx_slave_alloc,
1779         .slave_configure        = sym53c8xx_slave_configure,
1780         .slave_destroy          = sym53c8xx_slave_destroy,
1781         .eh_abort_handler       = sym53c8xx_eh_abort_handler,
1782         .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1783         .eh_bus_reset_handler   = sym53c8xx_eh_bus_reset_handler,
1784         .eh_host_reset_handler  = sym53c8xx_eh_host_reset_handler,
1785         .this_id                = 7,
1786         .use_clustering         = ENABLE_CLUSTERING,
1787         .use_sg_chaining        = ENABLE_SG_CHAINING,
1788         .max_sectors            = 0xFFFF,
1789 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1790         .proc_info              = sym53c8xx_proc_info,
1791         .proc_name              = NAME53C8XX,
1792 #endif
1793 };
1794
1795 static int attach_count;
1796
1797 static int __devinit sym2_probe(struct pci_dev *pdev,
1798                                 const struct pci_device_id *ent)
1799 {
1800         struct sym_device sym_dev;
1801         struct sym_nvram nvram;
1802         struct Scsi_Host *instance;
1803
1804         memset(&sym_dev, 0, sizeof(sym_dev));
1805         memset(&nvram, 0, sizeof(nvram));
1806
1807         if (pci_enable_device(pdev))
1808                 goto leave;
1809
1810         pci_set_master(pdev);
1811
1812         if (pci_request_regions(pdev, NAME53C8XX))
1813                 goto disable;
1814
1815         sym_init_device(pdev, &sym_dev);
1816         if (sym_check_supported(&sym_dev))
1817                 goto free;
1818
1819         if (sym_check_raid(&sym_dev))
1820                 goto leave;     /* Don't disable the device */
1821
1822         if (sym_set_workarounds(&sym_dev))
1823                 goto free;
1824
1825         sym_config_pqs(pdev, &sym_dev);
1826
1827         sym_get_nvram(&sym_dev, &nvram);
1828
1829         instance = sym_attach(&sym2_template, attach_count, &sym_dev);
1830         if (!instance)
1831                 goto free;
1832
1833         if (scsi_add_host(instance, &pdev->dev))
1834                 goto detach;
1835         scsi_scan_host(instance);
1836
1837         attach_count++;
1838
1839         return 0;
1840
1841  detach:
1842         sym_detach(pci_get_drvdata(pdev), pdev);
1843  free:
1844         pci_release_regions(pdev);
1845  disable:
1846         pci_disable_device(pdev);
1847  leave:
1848         return -ENODEV;
1849 }
1850
1851 static void __devexit sym2_remove(struct pci_dev *pdev)
1852 {
1853         struct sym_hcb *np = pci_get_drvdata(pdev);
1854         struct Scsi_Host *host = np->s.host;
1855
1856         scsi_remove_host(host);
1857         scsi_host_put(host);
1858
1859         sym_detach(np, pdev);
1860
1861         pci_release_regions(pdev);
1862         pci_disable_device(pdev);
1863
1864         attach_count--;
1865 }
1866
1867 static void sym2_get_signalling(struct Scsi_Host *shost)
1868 {
1869         struct sym_hcb *np = sym_get_hcb(shost);
1870         enum spi_signal_type type;
1871
1872         switch (np->scsi_mode) {
1873         case SMODE_SE:
1874                 type = SPI_SIGNAL_SE;
1875                 break;
1876         case SMODE_LVD:
1877                 type = SPI_SIGNAL_LVD;
1878                 break;
1879         case SMODE_HVD:
1880                 type = SPI_SIGNAL_HVD;
1881                 break;
1882         default:
1883                 type = SPI_SIGNAL_UNKNOWN;
1884                 break;
1885         }
1886         spi_signalling(shost) = type;
1887 }
1888
1889 static void sym2_set_offset(struct scsi_target *starget, int offset)
1890 {
1891         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1892         struct sym_hcb *np = sym_get_hcb(shost);
1893         struct sym_tcb *tp = &np->target[starget->id];
1894
1895         tp->tgoal.offset = offset;
1896         tp->tgoal.check_nego = 1;
1897 }
1898
1899 static void sym2_set_period(struct scsi_target *starget, int period)
1900 {
1901         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1902         struct sym_hcb *np = sym_get_hcb(shost);
1903         struct sym_tcb *tp = &np->target[starget->id];
1904
1905         /* have to have DT for these transfers, but DT will also
1906          * set width, so check that this is allowed */
1907         if (period <= np->minsync && spi_width(starget))
1908                 tp->tgoal.dt = 1;
1909
1910         tp->tgoal.period = period;
1911         tp->tgoal.check_nego = 1;
1912 }
1913
1914 static void sym2_set_width(struct scsi_target *starget, int width)
1915 {
1916         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1917         struct sym_hcb *np = sym_get_hcb(shost);
1918         struct sym_tcb *tp = &np->target[starget->id];
1919
1920         /* It is illegal to have DT set on narrow transfers.  If DT is
1921          * clear, we must also clear IU and QAS.  */
1922         if (width == 0)
1923                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1924
1925         tp->tgoal.width = width;
1926         tp->tgoal.check_nego = 1;
1927 }
1928
1929 static void sym2_set_dt(struct scsi_target *starget, int dt)
1930 {
1931         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1932         struct sym_hcb *np = sym_get_hcb(shost);
1933         struct sym_tcb *tp = &np->target[starget->id];
1934
1935         /* We must clear QAS and IU if DT is clear */
1936         if (dt)
1937                 tp->tgoal.dt = 1;
1938         else
1939                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1940         tp->tgoal.check_nego = 1;
1941 }
1942
1943 #if 0
1944 static void sym2_set_iu(struct scsi_target *starget, int iu)
1945 {
1946         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1947         struct sym_hcb *np = sym_get_hcb(shost);
1948         struct sym_tcb *tp = &np->target[starget->id];
1949
1950         if (iu)
1951                 tp->tgoal.iu = tp->tgoal.dt = 1;
1952         else
1953                 tp->tgoal.iu = 0;
1954         tp->tgoal.check_nego = 1;
1955 }
1956
1957 static void sym2_set_qas(struct scsi_target *starget, int qas)
1958 {
1959         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1960         struct sym_hcb *np = sym_get_hcb(shost);
1961         struct sym_tcb *tp = &np->target[starget->id];
1962
1963         if (qas)
1964                 tp->tgoal.dt = tp->tgoal.qas = 1;
1965         else
1966                 tp->tgoal.qas = 0;
1967         tp->tgoal.check_nego = 1;
1968 }
1969 #endif
1970
1971 static struct spi_function_template sym2_transport_functions = {
1972         .set_offset     = sym2_set_offset,
1973         .show_offset    = 1,
1974         .set_period     = sym2_set_period,
1975         .show_period    = 1,
1976         .set_width      = sym2_set_width,
1977         .show_width     = 1,
1978         .set_dt         = sym2_set_dt,
1979         .show_dt        = 1,
1980 #if 0
1981         .set_iu         = sym2_set_iu,
1982         .show_iu        = 1,
1983         .set_qas        = sym2_set_qas,
1984         .show_qas       = 1,
1985 #endif
1986         .get_signalling = sym2_get_signalling,
1987 };
1988
1989 static struct pci_device_id sym2_id_table[] __devinitdata = {
1990         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
1991           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
1992         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
1993           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
1994         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
1995           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
1996         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
1997           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
1998         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
1999           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2000         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2001           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2002         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2003           PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL },
2004         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2005           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2006         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2007           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2008         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2009           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2010         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2011           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2012         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2013           PCI_ANY_ID, PCI_ANY_ID,  PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL }, /* new */
2014         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2015           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2016         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2017           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2018         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2019           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2020         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2021           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2022         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2023           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2024         { 0, }
2025 };
2026
2027 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2028
2029 static struct pci_driver sym2_driver = {
2030         .name           = NAME53C8XX,
2031         .id_table       = sym2_id_table,
2032         .probe          = sym2_probe,
2033         .remove         = __devexit_p(sym2_remove),
2034 };
2035
2036 static int __init sym2_init(void)
2037 {
2038         int error;
2039
2040         sym2_setup_params();
2041         sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2042         if (!sym2_transport_template)
2043                 return -ENODEV;
2044
2045         error = pci_register_driver(&sym2_driver);
2046         if (error)
2047                 spi_release_transport(sym2_transport_template);
2048         return error;
2049 }
2050
2051 static void __exit sym2_exit(void)
2052 {
2053         pci_unregister_driver(&sym2_driver);
2054         spi_release_transport(sym2_transport_template);
2055 }
2056
2057 module_init(sym2_init);
2058 module_exit(sym2_exit);