git.oblomov.eu 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         dma_addr_t      data_mapping;
 138         unsigned char   data_mapped;
 139         unsigned char   to_do;                  /* For error handling */
 140         void (*old_done)(struct scsi_cmnd *);   /* For error handling */
 141         struct completion *eh_done;             /* For error handling */
 142 };
 143
 144 #define SYM_UCMD_PTR(cmd)  ((struct sym_ucmd *)(&(cmd)->SCp))
 145 #define SYM_SOFTC_PTR(cmd) sym_get_hcb(cmd->device->host)
 146
 147 static void __unmap_scsi_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
 148 {
 149         if (SYM_UCMD_PTR(cmd)->data_mapped)
 150                 scsi_dma_unmap(cmd);
 151
 152         SYM_UCMD_PTR(cmd)->data_mapped = 0;
 153 }
 154
 155 static int __map_scsi_sg_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
 156 {
 157         int use_sg;
 158
 159         use_sg = scsi_dma_map(cmd);
 160         if (use_sg > 0) {
 161                 SYM_UCMD_PTR(cmd)->data_mapped  = 2;
 162                 SYM_UCMD_PTR(cmd)->data_mapping = use_sg;
 163         }
 164
 165         return use_sg;
 166 }
 167
 168 #define unmap_scsi_data(np, cmd)        \
 169                 __unmap_scsi_data(np->s.device, cmd)
 170 #define map_scsi_sg_data(np, cmd)       \
 171                 __map_scsi_sg_data(np->s.device, cmd)
 172 /*
 173  *  Complete a pending CAM CCB.
 174  */
 175 void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *cmd)
 176 {
 177         unmap_scsi_data(np, cmd);
 178         cmd->scsi_done(cmd);
 179 }
 180
 181 static void sym_xpt_done2(struct sym_hcb *np, struct scsi_cmnd *cmd, int cam_status)
 182 {
 183         sym_set_cam_status(cmd, cam_status);
 184         sym_xpt_done(np, cmd);
 185 }
 186
 187
 188 /*
 189  *  Tell the SCSI layer about a BUS RESET.
 190  */
 191 void sym_xpt_async_bus_reset(struct sym_hcb *np)
 192 {
 193         printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
 194         np->s.settle_time = jiffies + sym_driver_setup.settle_delay * HZ;
 195         np->s.settle_time_valid = 1;
 196         if (sym_verbose >= 2)
 197                 printf_info("%s: command processing suspended for %d seconds\n",
 198                             sym_name(np), sym_driver_setup.settle_delay);
 199 }
 200
 201 /*
 202  *  Tell the SCSI layer about a BUS DEVICE RESET message sent.
 203  */
 204 void sym_xpt_async_sent_bdr(struct sym_hcb *np, int target)
 205 {
 206         printf_notice("%s: TARGET %d has been reset.\n", sym_name(np), target);
 207 }
 208
 209 /*
 210  *  Choose the more appropriate CAM status if
 211  *  the IO encountered an extended error.
 212  */
 213 static int sym_xerr_cam_status(int cam_status, int x_status)
 214 {
 215         if (x_status) {
 216                 if      (x_status & XE_PARITY_ERR)
 217                         cam_status = DID_PARITY;
 218                 else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN))
 219                         cam_status = DID_ERROR;
 220                 else if (x_status & XE_BAD_PHASE)
 221                         cam_status = DID_ERROR;
 222                 else
 223                         cam_status = DID_ERROR;
 224         }
 225         return cam_status;
 226 }
 227
 228 /*
 229  *  Build CAM result for a failed or auto-sensed IO.
 230  */
 231 void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid)
 232 {
 233         struct scsi_cmnd *cmd = cp->cmd;
 234         u_int cam_status, scsi_status, drv_status;
 235
 236         drv_status  = 0;
 237         cam_status  = DID_OK;
 238         scsi_status = cp->ssss_status;
 239
 240         if (cp->host_flags & HF_SENSE) {
 241                 scsi_status = cp->sv_scsi_status;
 242                 resid = cp->sv_resid;
 243                 if (sym_verbose && cp->sv_xerr_status)
 244                         sym_print_xerr(cmd, cp->sv_xerr_status);
 245                 if (cp->host_status == HS_COMPLETE &&
 246                     cp->ssss_status == S_GOOD &&
 247                     cp->xerr_status == 0) {
 248                         cam_status = sym_xerr_cam_status(DID_OK,
 249                                                          cp->sv_xerr_status);
 250                         drv_status = DRIVER_SENSE;
 251                         /*
 252                          *  Bounce back the sense data to user.
 253                          */
 254                         memset(&cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
 255                         memcpy(cmd->sense_buffer, cp->sns_bbuf,
 256                               min(sizeof(cmd->sense_buffer),
 257                                   (size_t)SYM_SNS_BBUF_LEN));
 258 #if 0
 259                         /*
 260                          *  If the device reports a UNIT ATTENTION condition
 261                          *  due to a RESET condition, we should consider all
 262                          *  disconnect CCBs for this unit as aborted.
 263                          */
 264                         if (1) {
 265                                 u_char *p;
 266                                 p  = (u_char *) cmd->sense_data;
 267                                 if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
 268                                         sym_clear_tasks(np, DID_ABORT,
 269                                                         cp->target,cp->lun, -1);
 270                         }
 271 #endif
 272                 } else {
 273                         /*
 274                          * Error return from our internal request sense.  This
 275                          * is bad: we must clear the contingent allegiance
 276                          * condition otherwise the device will always return
 277                          * BUSY.  Use a big stick.
 278                          */
 279                         sym_reset_scsi_target(np, cmd->device->id);
 280                         cam_status = DID_ERROR;
 281                 }
 282         } else if (cp->host_status == HS_COMPLETE)      /* Bad SCSI status */
 283                 cam_status = DID_OK;
 284         else if (cp->host_status == HS_SEL_TIMEOUT)     /* Selection timeout */
 285                 cam_status = DID_NO_CONNECT;
 286         else if (cp->host_status == HS_UNEXPECTED)      /* Unexpected BUS FREE*/
 287                 cam_status = DID_ERROR;
 288         else {                                          /* Extended error */
 289                 if (sym_verbose) {
 290                         sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
 291                                 cp->host_status, cp->ssss_status,
 292                                 cp->xerr_status);
 293                 }
 294                 /*
 295                  *  Set the most appropriate value for CAM status.
 296                  */
 297                 cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
 298         }
 299         scsi_set_resid(cmd, resid);
 300         cmd->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
 301 }
 302
 303 static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
 304 {
 305         int segment;
 306         int use_sg;
 307
 308         cp->data_len = 0;
 309
 310         use_sg = map_scsi_sg_data(np, cmd);
 311         if (use_sg > 0) {
 312                 struct scatterlist *sg;
 313                 struct sym_tcb *tp = &np->target[cp->target];
 314                 struct sym_tblmove *data;
 315
 316                 if (use_sg > SYM_CONF_MAX_SG) {
 317                         unmap_scsi_data(np, cmd);
 318                         return -1;
 319                 }
 320
 321                 data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
 322
 323                 scsi_for_each_sg(cmd, sg, use_sg, segment) {
 324                         dma_addr_t baddr = sg_dma_address(sg);
 325                         unsigned int len = sg_dma_len(sg);
 326
 327                         if ((len & 1) && (tp->head.wval & EWS)) {
 328                                 len++;
 329                                 cp->odd_byte_adjustment++;
 330                         }
 331
 332                         sym_build_sge(np, &data[segment], baddr, len);
 333                         cp->data_len += len;
 334                 }
 335         } else {
 336                 segment = -2;
 337         }
 338
 339         return segment;
 340 }
 341
 342 /*
 343  *  Queue a SCSI command.
 344  */
 345 static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd)
 346 {
 347         struct scsi_device *sdev = cmd->device;
 348         struct sym_tcb *tp;
 349         struct sym_lcb *lp;
 350         struct sym_ccb *cp;
 351         int     order;
 352
 353         /*
 354          *  Minimal checkings, so that we will not
 355          *  go outside our tables.
 356          */
 357         if (sdev->id == np->myaddr) {
 358                 sym_xpt_done2(np, cmd, DID_NO_CONNECT);
 359                 return 0;
 360         }
 361
 362         /*
 363          *  Retrieve the target descriptor.
 364          */
 365         tp = &np->target[sdev->id];
 366
 367         /*
 368          *  Select tagged/untagged.
 369          */
 370         lp = sym_lp(tp, sdev->lun);
 371         order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
 372
 373         /*
 374          *  Queue the SCSI IO.
 375          */
 376         cp = sym_get_ccb(np, cmd, order);
 377         if (!cp)
 378                 return 1;       /* Means resource shortage */
 379         sym_queue_scsiio(np, cmd, cp);
 380         return 0;
 381 }
 382
 383 /*
 384  *  Setup buffers and pointers that address the CDB.
 385  */
 386 static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
 387 {
 388         memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len);
 389
 390         cp->phys.cmd.addr = CCB_BA(cp, cdb_buf[0]);
 391         cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
 392
 393         return 0;
 394 }
 395
 396 /*
 397  *  Setup pointers that address the data and start the I/O.
 398  */
 399 int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
 400 {
 401         u32 lastp, goalp;
 402         int dir;
 403
 404         /*
 405          *  Build the CDB.
 406          */
 407         if (sym_setup_cdb(np, cmd, cp))
 408                 goto out_abort;
 409
 410         /*
 411          *  No direction means no data.
 412          */
 413         dir = cmd->sc_data_direction;
 414         if (dir != DMA_NONE) {
 415                 cp->segments = sym_scatter(np, cp, cmd);
 416                 if (cp->segments < 0) {
 417                         sym_set_cam_status(cmd, DID_ERROR);
 418                         goto out_abort;
 419                 }
 420
 421                 /*
 422                  *  No segments means no data.
 423                  */
 424                 if (!cp->segments)
 425                         dir = DMA_NONE;
 426         } else {
 427                 cp->data_len = 0;
 428                 cp->segments = 0;
 429         }
 430
 431         /*
 432          *  Set the data pointer.
 433          */
 434         switch (dir) {
 435         case DMA_BIDIRECTIONAL:
 436                 printk("%s: got DMA_BIDIRECTIONAL command", sym_name(np));
 437                 sym_set_cam_status(cmd, DID_ERROR);
 438                 goto out_abort;
 439         case DMA_TO_DEVICE:
 440                 goalp = SCRIPTA_BA(np, data_out2) + 8;
 441                 lastp = goalp - 8 - (cp->segments * (2*4));
 442                 break;
 443         case DMA_FROM_DEVICE:
 444                 cp->host_flags |= HF_DATA_IN;
 445                 goalp = SCRIPTA_BA(np, data_in2) + 8;
 446                 lastp = goalp - 8 - (cp->segments * (2*4));
 447                 break;
 448         case DMA_NONE:
 449         default:
 450                 lastp = goalp = SCRIPTB_BA(np, no_data);
 451                 break;
 452         }
 453
 454         /*
 455          *  Set all pointers values needed by SCRIPTS.
 456          */
 457         cp->phys.head.lastp = cpu_to_scr(lastp);
 458         cp->phys.head.savep = cpu_to_scr(lastp);
 459         cp->startp          = cp->phys.head.savep;
 460         cp->goalp           = cpu_to_scr(goalp);
 461
 462         /*
 463          *  When `#ifed 1', the code below makes the driver
 464          *  panic on the first attempt to write to a SCSI device.
 465          *  It is the first test we want to do after a driver
 466          *  change that does not seem obviously safe. :)
 467          */
 468 #if 0
 469         switch (cp->cdb_buf[0]) {
 470         case 0x0A: case 0x2A: case 0xAA:
 471                 panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
 472                 break;
 473         default:
 474                 break;
 475         }
 476 #endif
 477
 478         /*
 479          *      activate this job.
 480          */
 481         sym_put_start_queue(np, cp);
 482         return 0;
 483
 484 out_abort:
 485         sym_free_ccb(np, cp);
 486         sym_xpt_done(np, cmd);
 487         return 0;
 488 }
 489
 490
 491 /*
 492  *  timer daemon.
 493  *
 494  *  Misused to keep the driver running when
 495  *  interrupts are not configured correctly.
 496  */
 497 static void sym_timer(struct sym_hcb *np)
 498 {
 499         unsigned long thistime = jiffies;
 500
 501         /*
 502          *  Restart the timer.
 503          */
 504         np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
 505         add_timer(&np->s.timer);
 506
 507         /*
 508          *  If we are resetting the ncr, wait for settle_time before
 509          *  clearing it. Then command processing will be resumed.
 510          */
 511         if (np->s.settle_time_valid) {
 512                 if (time_before_eq(np->s.settle_time, thistime)) {
 513                         if (sym_verbose >= 2 )
 514                                 printk("%s: command processing resumed\n",
 515                                        sym_name(np));
 516                         np->s.settle_time_valid = 0;
 517                 }
 518                 return;
 519         }
 520
 521         /*
 522          *      Nothing to do for now, but that may come.
 523          */
 524         if (np->s.lasttime + 4*HZ < thistime) {
 525                 np->s.lasttime = thistime;
 526         }
 527
 528 #ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
 529         /*
 530          *  Some way-broken PCI bridges may lead to
 531          *  completions being lost when the clearing
 532          *  of the INTFLY flag by the CPU occurs
 533          *  concurrently with the chip raising this flag.
 534          *  If this ever happen, lost completions will
 535          * be reaped here.
 536          */
 537         sym_wakeup_done(np);
 538 #endif
 539 }
 540
 541
 542 /*
 543  *  PCI BUS error handler.
 544  */
 545 void sym_log_bus_error(struct sym_hcb *np)
 546 {
 547         u_short pci_sts;
 548         pci_read_config_word(np->s.device, PCI_STATUS, &pci_sts);
 549         if (pci_sts & 0xf900) {
 550                 pci_write_config_word(np->s.device, PCI_STATUS, pci_sts);
 551                 printf("%s: PCI STATUS = 0x%04x\n",
 552                         sym_name(np), pci_sts & 0xf900);
 553         }
 554 }
 555
 556 /*
 557  * queuecommand method.  Entered with the host adapter lock held and
 558  * interrupts disabled.
 559  */
 560 static int sym53c8xx_queue_command(struct scsi_cmnd *cmd,
 561                                         void (*done)(struct scsi_cmnd *))
 562 {
 563         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
 564         struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
 565         int sts = 0;
 566
 567         cmd->scsi_done     = done;
 568         memset(ucp, 0, sizeof(*ucp));
 569
 570         /*
 571          *  Shorten our settle_time if needed for
 572          *  this command not to time out.
 573          */
 574         if (np->s.settle_time_valid && cmd->timeout_per_command) {
 575                 unsigned long tlimit = jiffies + cmd->timeout_per_command;
 576                 tlimit -= SYM_CONF_TIMER_INTERVAL*2;
 577                 if (time_after(np->s.settle_time, tlimit)) {
 578                         np->s.settle_time = tlimit;
 579                 }
 580         }
 581
 582         if (np->s.settle_time_valid)
 583                 return SCSI_MLQUEUE_HOST_BUSY;
 584
 585         sts = sym_queue_command(np, cmd);
 586         if (sts)
 587                 return SCSI_MLQUEUE_HOST_BUSY;
 588         return 0;
 589 }
 590
 591 /*
 592  *  Linux entry point of the interrupt handler.
 593  */
 594 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id)
 595 {
 596         unsigned long flags;
 597         struct sym_hcb *np = (struct sym_hcb *)dev_id;
 598
 599         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
 600
 601         spin_lock_irqsave(np->s.host->host_lock, flags);
 602         sym_interrupt(np);
 603         spin_unlock_irqrestore(np->s.host->host_lock, flags);
 604
 605         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
 606
 607         return IRQ_HANDLED;
 608 }
 609
 610 /*
 611  *  Linux entry point of the timer handler
 612  */
 613 static void sym53c8xx_timer(unsigned long npref)
 614 {
 615         struct sym_hcb *np = (struct sym_hcb *)npref;
 616         unsigned long flags;
 617
 618         spin_lock_irqsave(np->s.host->host_lock, flags);
 619         sym_timer(np);
 620         spin_unlock_irqrestore(np->s.host->host_lock, flags);
 621 }
 622
 623
 624 /*
 625  *  What the eh thread wants us to perform.
 626  */
 627 #define SYM_EH_ABORT            0
 628 #define SYM_EH_DEVICE_RESET     1
 629 #define SYM_EH_BUS_RESET        2
 630 #define SYM_EH_HOST_RESET       3
 631
 632 /*
 633  *  What we will do regarding the involved SCSI command.
 634  */
 635 #define SYM_EH_DO_IGNORE        0
 636 #define SYM_EH_DO_WAIT          2
 637
 638 /*
 639  *  scsi_done() alias when error recovery is in progress.
 640  */
 641 static void sym_eh_done(struct scsi_cmnd *cmd)
 642 {
 643         struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
 644         BUILD_BUG_ON(sizeof(struct scsi_pointer) < sizeof(struct sym_ucmd));
 645
 646         cmd->scsi_done = ucmd->old_done;
 647
 648         if (ucmd->to_do == SYM_EH_DO_WAIT)
 649                 complete(ucmd->eh_done);
 650 }
 651
 652 /*
 653  *  Generic method for our eh processing.
 654  *  The 'op' argument tells what we have to do.
 655  */
 656 static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
 657 {
 658         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
 659         struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
 660         struct Scsi_Host *host = cmd->device->host;
 661         SYM_QUEHEAD *qp;
 662         int to_do = SYM_EH_DO_IGNORE;
 663         int sts = -1;
 664         struct completion eh_done;
 665
 666         dev_warn(&cmd->device->sdev_gendev, "%s operation started.\n", opname);
 667
 668         spin_lock_irq(host->host_lock);
 669         /* This one is queued in some place -> to wait for completion */
 670         FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
 671                 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
 672                 if (cp->cmd == cmd) {
 673                         to_do = SYM_EH_DO_WAIT;
 674                         break;
 675                 }
 676         }
 677
 678         if (to_do == SYM_EH_DO_WAIT) {
 679                 init_completion(&eh_done);
 680                 ucmd->old_done = cmd->scsi_done;
 681                 ucmd->eh_done = &eh_done;
 682                 wmb();
 683                 cmd->scsi_done = sym_eh_done;
 684         }
 685
 686         /* Try to proceed the operation we have been asked for */
 687         sts = -1;
 688         switch(op) {
 689         case SYM_EH_ABORT:
 690                 sts = sym_abort_scsiio(np, cmd, 1);
 691                 break;
 692         case SYM_EH_DEVICE_RESET:
 693                 sts = sym_reset_scsi_target(np, cmd->device->id);
 694                 break;
 695         case SYM_EH_BUS_RESET:
 696                 sym_reset_scsi_bus(np, 1);
 697                 sts = 0;
 698                 break;
 699         case SYM_EH_HOST_RESET:
 700                 sym_reset_scsi_bus(np, 0);
 701                 sym_start_up (np, 1);
 702                 sts = 0;
 703                 break;
 704         default:
 705                 break;
 706         }
 707
 708         /* On error, restore everything and cross fingers :) */
 709         if (sts) {
 710                 cmd->scsi_done = ucmd->old_done;
 711                 to_do = SYM_EH_DO_IGNORE;
 712         }
 713
 714         ucmd->to_do = to_do;
 715         spin_unlock_irq(host->host_lock);
 716
 717         if (to_do == SYM_EH_DO_WAIT) {
 718                 if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
 719                         ucmd->to_do = SYM_EH_DO_IGNORE;
 720                         wmb();
 721                         sts = -2;
 722                 }
 723         }
 724         dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
 725                         sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
 726         return sts ? SCSI_FAILED : SCSI_SUCCESS;
 727 }
 728
 729
 730 /*
 731  * Error handlers called from the eh thread (one thread per HBA).
 732  */
 733 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
 734 {
 735         return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
 736 }
 737
 738 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
 739 {
 740         return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
 741 }
 742
 743 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
 744 {
 745         return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
 746 }
 747
 748 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
 749 {
 750         return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
 751 }
 752
 753 /*
 754  *  Tune device queuing depth, according to various limits.
 755  */
 756 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
 757 {
 758         struct sym_lcb *lp = sym_lp(tp, lun);
 759         u_short oldtags;
 760
 761         if (!lp)
 762                 return;
 763
 764         oldtags = lp->s.reqtags;
 765
 766         if (reqtags > lp->s.scdev_depth)
 767                 reqtags = lp->s.scdev_depth;
 768
 769         lp->s.reqtags     = reqtags;
 770
 771         if (reqtags != oldtags) {
 772                 dev_info(&tp->starget->dev,
 773                          "tagged command queuing %s, command queue depth %d.\n",
 774                           lp->s.reqtags ? "enabled" : "disabled", reqtags);
 775         }
 776 }
 777
 778 /*
 779  *  Linux select queue depths function
 780  */
 781 #define DEF_DEPTH       (sym_driver_setup.max_tag)
 782 #define ALL_TARGETS     -2
 783 #define NO_TARGET       -1
 784 #define ALL_LUNS        -2
 785 #define NO_LUN          -1
 786
 787 static int device_queue_depth(struct sym_hcb *np, int target, int lun)
 788 {
 789         int c, h, t, u, v;
 790         char *p = sym_driver_setup.tag_ctrl;
 791         char *ep;
 792
 793         h = -1;
 794         t = NO_TARGET;
 795         u = NO_LUN;
 796         while ((c = *p++) != 0) {
 797                 v = simple_strtoul(p, &ep, 0);
 798                 switch(c) {
 799                 case '/':
 800                         ++h;
 801                         t = ALL_TARGETS;
 802                         u = ALL_LUNS;
 803                         break;
 804                 case 't':
 805                         if (t != target)
 806                                 t = (target == v) ? v : NO_TARGET;
 807                         u = ALL_LUNS;
 808                         break;
 809                 case 'u':
 810                         if (u != lun)
 811                                 u = (lun == v) ? v : NO_LUN;
 812                         break;
 813                 case 'q':
 814                         if (h == np->s.unit &&
 815                                 (t == ALL_TARGETS || t == target) &&
 816                                 (u == ALL_LUNS    || u == lun))
 817                                 return v;
 818                         break;
 819                 case '-':
 820                         t = ALL_TARGETS;
 821                         u = ALL_LUNS;
 822                         break;
 823                 default:
 824                         break;
 825                 }
 826                 p = ep;
 827         }
 828         return DEF_DEPTH;
 829 }
 830
 831 static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
 832 {
 833         struct sym_hcb *np = sym_get_hcb(sdev->host);
 834         struct sym_tcb *tp = &np->target[sdev->id];
 835         struct sym_lcb *lp;
 836
 837         if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
 838                 return -ENXIO;
 839
 840         tp->starget = sdev->sdev_target;
 841         /*
 842          * Fail the device init if the device is flagged NOSCAN at BOOT in
 843          * the NVRAM.  This may speed up boot and maintain coherency with
 844          * BIOS device numbering.  Clearing the flag allows the user to
 845          * rescan skipped devices later.  We also return an error for
 846          * devices not flagged for SCAN LUNS in the NVRAM since some single
 847          * lun devices behave badly when asked for a non zero LUN.
 848          */
 849
 850         if (tp->usrflags & SYM_SCAN_BOOT_DISABLED) {
 851                 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
 852                 starget_printk(KERN_INFO, tp->starget,
 853                                 "Scan at boot disabled in NVRAM\n");
 854                 return -ENXIO;
 855         }
 856
 857         if (tp->usrflags & SYM_SCAN_LUNS_DISABLED) {
 858                 if (sdev->lun != 0)
 859                         return -ENXIO;
 860                 starget_printk(KERN_INFO, tp->starget,
 861                                 "Multiple LUNs disabled in NVRAM\n");
 862         }
 863
 864         lp = sym_alloc_lcb(np, sdev->id, sdev->lun);
 865         if (!lp)
 866                 return -ENOMEM;
 867
 868         spi_min_period(tp->starget) = tp->usr_period;
 869         spi_max_width(tp->starget) = tp->usr_width;
 870
 871         return 0;
 872 }
 873
 874 /*
 875  * Linux entry point for device queue sizing.
 876  */
 877 static int sym53c8xx_slave_configure(struct scsi_device *sdev)
 878 {
 879         struct sym_hcb *np = sym_get_hcb(sdev->host);
 880         struct sym_tcb *tp = &np->target[sdev->id];
 881         struct sym_lcb *lp = sym_lp(tp, sdev->lun);
 882         int reqtags, depth_to_use;
 883
 884         /*
 885          *  Get user flags.
 886          */
 887         lp->curr_flags = lp->user_flags;
 888
 889         /*
 890          *  Select queue depth from driver setup.
 891          *  Donnot use more than configured by user.
 892          *  Use at least 2.
 893          *  Donnot use more than our maximum.
 894          */
 895         reqtags = device_queue_depth(np, sdev->id, sdev->lun);
 896         if (reqtags > tp->usrtags)
 897                 reqtags = tp->usrtags;
 898         if (!sdev->tagged_supported)
 899                 reqtags = 0;
 900 #if 1 /* Avoid to locally queue commands for no good reasons */
 901         if (reqtags > SYM_CONF_MAX_TAG)
 902                 reqtags = SYM_CONF_MAX_TAG;
 903         depth_to_use = (reqtags ? reqtags : 2);
 904 #else
 905         depth_to_use = (reqtags ? SYM_CONF_MAX_TAG : 2);
 906 #endif
 907         scsi_adjust_queue_depth(sdev,
 908                                 (sdev->tagged_supported ?
 909                                  MSG_SIMPLE_TAG : 0),
 910                                 depth_to_use);
 911         lp->s.scdev_depth = depth_to_use;
 912         sym_tune_dev_queuing(tp, sdev->lun, reqtags);
 913
 914         if (!spi_initial_dv(sdev->sdev_target))
 915                 spi_dv_device(sdev);
 916
 917         return 0;
 918 }
 919
 920 static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
 921 {
 922         struct sym_hcb *np = sym_get_hcb(sdev->host);
 923         struct sym_lcb *lp = sym_lp(&np->target[sdev->id], sdev->lun);
 924
 925         if (lp->itlq_tbl)
 926                 sym_mfree_dma(lp->itlq_tbl, SYM_CONF_MAX_TASK * 4, "ITLQ_TBL");
 927         kfree(lp->cb_tags);
 928         sym_mfree_dma(lp, sizeof(*lp), "LCB");
 929 }
 930
 931 /*
 932  *  Linux entry point for info() function
 933  */
 934 static const char *sym53c8xx_info (struct Scsi_Host *host)
 935 {
 936         return SYM_DRIVER_NAME;
 937 }
 938
 939
 940 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
 941 /*
 942  *  Proc file system stuff
 943  *
 944  *  A read operation returns adapter information.
 945  *  A write operation is a control command.
 946  *  The string is parsed in the driver code and the command is passed
 947  *  to the sym_usercmd() function.
 948  */
 949
 950 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
 951
 952 struct  sym_usrcmd {
 953         u_long  target;
 954         u_long  lun;
 955         u_long  data;
 956         u_long  cmd;
 957 };
 958
 959 #define UC_SETSYNC      10
 960 #define UC_SETTAGS      11
 961 #define UC_SETDEBUG     12
 962 #define UC_SETWIDE      14
 963 #define UC_SETFLAG      15
 964 #define UC_SETVERBOSE   17
 965 #define UC_RESETDEV     18
 966 #define UC_CLEARDEV     19
 967
 968 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
 969 {
 970         struct sym_tcb *tp;
 971         int t, l;
 972
 973         switch (uc->cmd) {
 974         case 0: return;
 975
 976 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
 977         case UC_SETDEBUG:
 978                 sym_debug_flags = uc->data;
 979                 break;
 980 #endif
 981         case UC_SETVERBOSE:
 982                 np->verbose = uc->data;
 983                 break;
 984         default:
 985                 /*
 986                  * We assume that other commands apply to targets.
 987                  * This should always be the case and avoid the below
 988                  * 4 lines to be repeated 6 times.
 989                  */
 990                 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
 991                         if (!((uc->target >> t) & 1))
 992                                 continue;
 993                         tp = &np->target[t];
 994
 995                         switch (uc->cmd) {
 996
 997                         case UC_SETSYNC:
 998                                 if (!uc->data || uc->data >= 255) {
 999                                         tp->tgoal.iu = tp->tgoal.dt =
1000                                                 tp->tgoal.qas = 0;
1001                                         tp->tgoal.offset = 0;
1002                                 } else if (uc->data <= 9 && np->minsync_dt) {
1003                                         if (uc->data < np->minsync_dt)
1004                                                 uc->data = np->minsync_dt;
1005                                         tp->tgoal.iu = tp->tgoal.dt =
1006                                                 tp->tgoal.qas = 1;
1007                                         tp->tgoal.width = 1;
1008                                         tp->tgoal.period = uc->data;
1009                                         tp->tgoal.offset = np->maxoffs_dt;
1010                                 } else {
1011                                         if (uc->data < np->minsync)
1012                                                 uc->data = np->minsync;
1013                                         tp->tgoal.iu = tp->tgoal.dt =
1014                                                 tp->tgoal.qas = 0;
1015                                         tp->tgoal.period = uc->data;
1016                                         tp->tgoal.offset = np->maxoffs;
1017                                 }
1018                                 tp->tgoal.check_nego = 1;
1019                                 break;
1020                         case UC_SETWIDE:
1021                                 tp->tgoal.width = uc->data ? 1 : 0;
1022                                 tp->tgoal.check_nego = 1;
1023                                 break;
1024                         case UC_SETTAGS:
1025                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
1026                                         sym_tune_dev_queuing(tp, l, uc->data);
1027                                 break;
1028                         case UC_RESETDEV:
1029                                 tp->to_reset = 1;
1030                                 np->istat_sem = SEM;
1031                                 OUTB(np, nc_istat, SIGP|SEM);
1032                                 break;
1033                         case UC_CLEARDEV:
1034                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
1035                                         struct sym_lcb *lp = sym_lp(tp, l);
1036                                         if (lp) lp->to_clear = 1;
1037                                 }
1038                                 np->istat_sem = SEM;
1039                                 OUTB(np, nc_istat, SIGP|SEM);
1040                                 break;
1041                         case UC_SETFLAG:
1042                                 tp->usrflags = uc->data;
1043                                 break;
1044                         }
1045                 }
1046                 break;
1047         }
1048 }
1049
1050 static int skip_spaces(char *ptr, int len)
1051 {
1052         int cnt, c;
1053
1054         for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
1055
1056         return (len - cnt);
1057 }
1058
1059 static int get_int_arg(char *ptr, int len, u_long *pv)
1060 {
1061         char *end;
1062
1063         *pv = simple_strtoul(ptr, &end, 10);
1064         return (end - ptr);
1065 }
1066
1067 static int is_keyword(char *ptr, int len, char *verb)
1068 {
1069         int verb_len = strlen(verb);
1070
1071         if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1072                 return verb_len;
1073         else
1074                 return 0;
1075 }
1076
1077 #define SKIP_SPACES(ptr, len)                                           \
1078         if ((arg_len = skip_spaces(ptr, len)) < 1)                      \
1079                 return -EINVAL;                                         \
1080         ptr += arg_len; len -= arg_len;
1081
1082 #define GET_INT_ARG(ptr, len, v)                                        \
1083         if (!(arg_len = get_int_arg(ptr, len, &(v))))                   \
1084                 return -EINVAL;                                         \
1085         ptr += arg_len; len -= arg_len;
1086
1087
1088 /*
1089  * Parse a control command
1090  */
1091
1092 static int sym_user_command(struct sym_hcb *np, char *buffer, int length)
1093 {
1094         char *ptr       = buffer;
1095         int len         = length;
1096         struct sym_usrcmd cmd, *uc = &cmd;
1097         int             arg_len;
1098         u_long          target;
1099
1100         memset(uc, 0, sizeof(*uc));
1101
1102         if (len > 0 && ptr[len-1] == '\n')
1103                 --len;
1104
1105         if      ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1106                 uc->cmd = UC_SETSYNC;
1107         else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1108                 uc->cmd = UC_SETTAGS;
1109         else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1110                 uc->cmd = UC_SETVERBOSE;
1111         else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1112                 uc->cmd = UC_SETWIDE;
1113 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1114         else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1115                 uc->cmd = UC_SETDEBUG;
1116 #endif
1117         else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1118                 uc->cmd = UC_SETFLAG;
1119         else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1120                 uc->cmd = UC_RESETDEV;
1121         else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1122                 uc->cmd = UC_CLEARDEV;
1123         else
1124                 arg_len = 0;
1125
1126 #ifdef DEBUG_PROC_INFO
1127 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1128 #endif
1129
1130         if (!arg_len)
1131                 return -EINVAL;
1132         ptr += arg_len; len -= arg_len;
1133
1134         switch(uc->cmd) {
1135         case UC_SETSYNC:
1136         case UC_SETTAGS:
1137         case UC_SETWIDE:
1138         case UC_SETFLAG:
1139         case UC_RESETDEV:
1140         case UC_CLEARDEV:
1141                 SKIP_SPACES(ptr, len);
1142                 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1143                         ptr += arg_len; len -= arg_len;
1144                         uc->target = ~0;
1145                 } else {
1146                         GET_INT_ARG(ptr, len, target);
1147                         uc->target = (1<<target);
1148 #ifdef DEBUG_PROC_INFO
1149 printk("sym_user_command: target=%ld\n", target);
1150 #endif
1151                 }
1152                 break;
1153         }
1154
1155         switch(uc->cmd) {
1156         case UC_SETVERBOSE:
1157         case UC_SETSYNC:
1158         case UC_SETTAGS:
1159         case UC_SETWIDE:
1160                 SKIP_SPACES(ptr, len);
1161                 GET_INT_ARG(ptr, len, uc->data);
1162 #ifdef DEBUG_PROC_INFO
1163 printk("sym_user_command: data=%ld\n", uc->data);
1164 #endif
1165                 break;
1166 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1167         case UC_SETDEBUG:
1168                 while (len > 0) {
1169                         SKIP_SPACES(ptr, len);
1170                         if      ((arg_len = is_keyword(ptr, len, "alloc")))
1171                                 uc->data |= DEBUG_ALLOC;
1172                         else if ((arg_len = is_keyword(ptr, len, "phase")))
1173                                 uc->data |= DEBUG_PHASE;
1174                         else if ((arg_len = is_keyword(ptr, len, "queue")))
1175                                 uc->data |= DEBUG_QUEUE;
1176                         else if ((arg_len = is_keyword(ptr, len, "result")))
1177                                 uc->data |= DEBUG_RESULT;
1178                         else if ((arg_len = is_keyword(ptr, len, "scatter")))
1179                                 uc->data |= DEBUG_SCATTER;
1180                         else if ((arg_len = is_keyword(ptr, len, "script")))
1181                                 uc->data |= DEBUG_SCRIPT;
1182                         else if ((arg_len = is_keyword(ptr, len, "tiny")))
1183                                 uc->data |= DEBUG_TINY;
1184                         else if ((arg_len = is_keyword(ptr, len, "timing")))
1185                                 uc->data |= DEBUG_TIMING;
1186                         else if ((arg_len = is_keyword(ptr, len, "nego")))
1187                                 uc->data |= DEBUG_NEGO;
1188                         else if ((arg_len = is_keyword(ptr, len, "tags")))
1189                                 uc->data |= DEBUG_TAGS;
1190                         else if ((arg_len = is_keyword(ptr, len, "pointer")))
1191                                 uc->data |= DEBUG_POINTER;
1192                         else
1193                                 return -EINVAL;
1194                         ptr += arg_len; len -= arg_len;
1195                 }
1196 #ifdef DEBUG_PROC_INFO
1197 printk("sym_user_command: data=%ld\n", uc->data);
1198 #endif
1199                 break;
1200 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1201         case UC_SETFLAG:
1202                 while (len > 0) {
1203                         SKIP_SPACES(ptr, len);
1204                         if      ((arg_len = is_keyword(ptr, len, "no_disc")))
1205                                 uc->data &= ~SYM_DISC_ENABLED;
1206                         else
1207                                 return -EINVAL;
1208                         ptr += arg_len; len -= arg_len;
1209                 }
1210                 break;
1211         default:
1212                 break;
1213         }
1214
1215         if (len)
1216                 return -EINVAL;
1217         else {
1218                 unsigned long flags;
1219
1220                 spin_lock_irqsave(np->s.host->host_lock, flags);
1221                 sym_exec_user_command (np, uc);
1222                 spin_unlock_irqrestore(np->s.host->host_lock, flags);
1223         }
1224         return length;
1225 }
1226
1227 #endif  /* SYM_LINUX_USER_COMMAND_SUPPORT */
1228
1229
1230 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1231 /*
1232  *  Informations through the proc file system.
1233  */
1234 struct info_str {
1235         char *buffer;
1236         int length;
1237         int offset;
1238         int pos;
1239 };
1240
1241 static void copy_mem_info(struct info_str *info, char *data, int len)
1242 {
1243         if (info->pos + len > info->length)
1244                 len = info->length - info->pos;
1245
1246         if (info->pos + len < info->offset) {
1247                 info->pos += len;
1248                 return;
1249         }
1250         if (info->pos < info->offset) {
1251                 data += (info->offset - info->pos);
1252                 len  -= (info->offset - info->pos);
1253         }
1254
1255         if (len > 0) {
1256                 memcpy(info->buffer + info->pos, data, len);
1257                 info->pos += len;
1258         }
1259 }
1260
1261 static int copy_info(struct info_str *info, char *fmt, ...)
1262 {
1263         va_list args;
1264         char buf[81];
1265         int len;
1266
1267         va_start(args, fmt);
1268         len = vsprintf(buf, fmt, args);
1269         va_end(args);
1270
1271         copy_mem_info(info, buf, len);
1272         return len;
1273 }
1274
1275 /*
1276  *  Copy formatted information into the input buffer.
1277  */
1278 static int sym_host_info(struct sym_hcb *np, char *ptr, off_t offset, int len)
1279 {
1280         struct info_str info;
1281
1282         info.buffer     = ptr;
1283         info.length     = len;
1284         info.offset     = offset;
1285         info.pos        = 0;
1286
1287         copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1288                          "revision id 0x%x\n",
1289                          np->s.chip_name, np->device_id, np->revision_id);
1290         copy_info(&info, "At PCI address %s, IRQ " IRQ_FMT "\n",
1291                 pci_name(np->s.device), IRQ_PRM(np->s.irq));
1292         copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1293                          (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1294                          np->maxwide ? "Wide" : "Narrow",
1295                          np->minsync_dt ? ", DT capable" : "");
1296
1297         copy_info(&info, "Max. started commands %d, "
1298                          "max. commands per LUN %d\n",
1299                          SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1300
1301         return info.pos > info.offset? info.pos - info.offset : 0;
1302 }
1303 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1304
1305 /*
1306  *  Entry point of the scsi proc fs of the driver.
1307  *  - func = 0 means read  (returns adapter infos)
1308  *  - func = 1 means write (not yet merget from sym53c8xx)
1309  */
1310 static int sym53c8xx_proc_info(struct Scsi_Host *host, char *buffer,
1311                         char **start, off_t offset, int length, int func)
1312 {
1313         struct sym_hcb *np = sym_get_hcb(host);
1314         int retv;
1315
1316         if (func) {
1317 #ifdef  SYM_LINUX_USER_COMMAND_SUPPORT
1318                 retv = sym_user_command(np, buffer, length);
1319 #else
1320                 retv = -EINVAL;
1321 #endif
1322         } else {
1323                 if (start)
1324                         *start = buffer;
1325 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1326                 retv = sym_host_info(np, buffer, offset, length);
1327 #else
1328                 retv = -EINVAL;
1329 #endif
1330         }
1331
1332         return retv;
1333 }
1334 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1335
1336 /*
1337  *      Free controller resources.
1338  */
1339 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev)
1340 {
1341         /*
1342          *  Free O/S specific resources.
1343          */
1344         if (np->s.irq)
1345                 free_irq(np->s.irq, np);
1346         if (np->s.ioaddr)
1347                 pci_iounmap(pdev, np->s.ioaddr);
1348         if (np->s.ramaddr)
1349                 pci_iounmap(pdev, np->s.ramaddr);
1350         /*
1351          *  Free O/S independent resources.
1352          */
1353         sym_hcb_free(np);
1354
1355         sym_mfree_dma(np, sizeof(*np), "HCB");
1356 }
1357
1358 /*
1359  *  Ask/tell the system about DMA addressing.
1360  */
1361 static int sym_setup_bus_dma_mask(struct sym_hcb *np)
1362 {
1363 #if SYM_CONF_DMA_ADDRESSING_MODE > 0
1364 #if   SYM_CONF_DMA_ADDRESSING_MODE == 1
1365 #define DMA_DAC_MASK    DMA_40BIT_MASK
1366 #elif SYM_CONF_DMA_ADDRESSING_MODE == 2
1367 #define DMA_DAC_MASK    DMA_64BIT_MASK
1368 #endif
1369         if ((np->features & FE_DAC) &&
1370                         !pci_set_dma_mask(np->s.device, DMA_DAC_MASK)) {
1371                 np->use_dac = 1;
1372                 return 0;
1373         }
1374 #endif
1375
1376         if (!pci_set_dma_mask(np->s.device, DMA_32BIT_MASK))
1377                 return 0;
1378
1379         printf_warning("%s: No suitable DMA available\n", sym_name(np));
1380         return -1;
1381 }
1382
1383 /*
1384  *  Host attach and initialisations.
1385  *
1386  *  Allocate host data and ncb structure.
1387  *  Remap MMIO region.
1388  *  Do chip initialization.
1389  *  If all is OK, install interrupt handling and
1390  *  start the timer daemon.
1391  */
1392 static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1393                 int unit, struct sym_device *dev)
1394 {
1395         struct host_data *host_data;
1396         struct sym_hcb *np = NULL;
1397         struct Scsi_Host *instance = NULL;
1398         struct pci_dev *pdev = dev->pdev;
1399         unsigned long flags;
1400         struct sym_fw *fw;
1401
1402         printk(KERN_INFO
1403                 "sym%d: <%s> rev 0x%x at pci %s irq " IRQ_FMT "\n",
1404                 unit, dev->chip.name, dev->chip.revision_id,
1405                 pci_name(pdev), IRQ_PRM(pdev->irq));
1406
1407         /*
1408          *  Get the firmware for this chip.
1409          */
1410         fw = sym_find_firmware(&dev->chip);
1411         if (!fw)
1412                 goto attach_failed;
1413
1414         /*
1415          *      Allocate host_data structure
1416          */
1417         instance = scsi_host_alloc(tpnt, sizeof(*host_data));
1418         if (!instance)
1419                 goto attach_failed;
1420         host_data = (struct host_data *) instance->hostdata;
1421
1422         /*
1423          *  Allocate immediately the host control block,
1424          *  since we are only expecting to succeed. :)
1425          *  We keep track in the HCB of all the resources that
1426          *  are to be released on error.
1427          */
1428         np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1429         if (!np)
1430                 goto attach_failed;
1431         np->s.device = pdev;
1432         np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1433         host_data->ncb = np;
1434         np->s.host = instance;
1435
1436         pci_set_drvdata(pdev, np);
1437
1438         /*
1439          *  Copy some useful infos to the HCB.
1440          */
1441         np->hcb_ba      = vtobus(np);
1442         np->verbose     = sym_driver_setup.verbose;
1443         np->s.device    = pdev;
1444         np->s.unit      = unit;
1445         np->device_id   = dev->chip.device_id;
1446         np->revision_id = dev->chip.revision_id;
1447         np->features    = dev->chip.features;
1448         np->clock_divn  = dev->chip.nr_divisor;
1449         np->maxoffs     = dev->chip.offset_max;
1450         np->maxburst    = dev->chip.burst_max;
1451         np->myaddr      = dev->host_id;
1452
1453         /*
1454          *  Edit its name.
1455          */
1456         strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1457         sprintf(np->s.inst_name, "sym%d", np->s.unit);
1458
1459         if (sym_setup_bus_dma_mask(np))
1460                 goto attach_failed;
1461
1462         /*
1463          *  Try to map the controller chip to
1464          *  virtual and physical memory.
1465          */
1466         np->mmio_ba = (u32)dev->mmio_base;
1467         np->s.ioaddr    = dev->s.ioaddr;
1468         np->s.ramaddr   = dev->s.ramaddr;
1469         np->s.io_ws = (np->features & FE_IO256) ? 256 : 128;
1470
1471         /*
1472          *  Map on-chip RAM if present and supported.
1473          */
1474         if (!(np->features & FE_RAM))
1475                 dev->ram_base = 0;
1476         if (dev->ram_base) {
1477                 np->ram_ba = (u32)dev->ram_base;
1478                 np->ram_ws = (np->features & FE_RAM8K) ? 8192 : 4096;
1479         }
1480
1481         if (sym_hcb_attach(instance, fw, dev->nvram))
1482                 goto attach_failed;
1483
1484         /*
1485          *  Install the interrupt handler.
1486          *  If we synchonize the C code with SCRIPTS on interrupt,
1487          *  we do not want to share the INTR line at all.
1488          */
1489         if (request_irq(pdev->irq, sym53c8xx_intr, IRQF_SHARED, NAME53C8XX, np)) {
1490                 printf_err("%s: request irq %d failure\n",
1491                         sym_name(np), pdev->irq);
1492                 goto attach_failed;
1493         }
1494         np->s.irq = pdev->irq;
1495
1496         /*
1497          *  After SCSI devices have been opened, we cannot
1498          *  reset the bus safely, so we do it here.
1499          */
1500         spin_lock_irqsave(instance->host_lock, flags);
1501         if (sym_reset_scsi_bus(np, 0))
1502                 goto reset_failed;
1503
1504         /*
1505          *  Start the SCRIPTS.
1506          */
1507         sym_start_up (np, 1);
1508
1509         /*
1510          *  Start the timer daemon
1511          */
1512         init_timer(&np->s.timer);
1513         np->s.timer.data     = (unsigned long) np;
1514         np->s.timer.function = sym53c8xx_timer;
1515         np->s.lasttime=0;
1516         sym_timer (np);
1517
1518         /*
1519          *  Fill Linux host instance structure
1520          *  and return success.
1521          */
1522         instance->max_channel   = 0;
1523         instance->this_id       = np->myaddr;
1524         instance->max_id        = np->maxwide ? 16 : 8;
1525         instance->max_lun       = SYM_CONF_MAX_LUN;
1526         instance->unique_id     = pci_resource_start(pdev, 0);
1527         instance->cmd_per_lun   = SYM_CONF_MAX_TAG;
1528         instance->can_queue     = (SYM_CONF_MAX_START-2);
1529         instance->sg_tablesize  = SYM_CONF_MAX_SG;
1530         instance->max_cmd_len   = 16;
1531         BUG_ON(sym2_transport_template == NULL);
1532         instance->transportt    = sym2_transport_template;
1533
1534         spin_unlock_irqrestore(instance->host_lock, flags);
1535
1536         return instance;
1537
1538  reset_failed:
1539         printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1540                    "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1541         spin_unlock_irqrestore(instance->host_lock, flags);
1542  attach_failed:
1543         if (!instance)
1544                 return NULL;
1545         printf_info("%s: giving up ...\n", sym_name(np));
1546         if (np)
1547                 sym_free_resources(np, pdev);
1548         scsi_host_put(instance);
1549
1550         return NULL;
1551  }
1552
1553
1554 /*
1555  *    Detect and try to read SYMBIOS and TEKRAM NVRAM.
1556  */
1557 #if SYM_CONF_NVRAM_SUPPORT
1558 static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1559 {
1560         devp->nvram = nvp;
1561         devp->device_id = devp->chip.device_id;
1562         nvp->type = 0;
1563
1564         sym_read_nvram(devp, nvp);
1565 }
1566 #else
1567 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1568 {
1569 }
1570 #endif  /* SYM_CONF_NVRAM_SUPPORT */
1571
1572 static int __devinit sym_check_supported(struct sym_device *device)
1573 {
1574         struct sym_chip *chip;
1575         struct pci_dev *pdev = device->pdev;
1576         u_char revision;
1577         unsigned long io_port = pci_resource_start(pdev, 0);
1578         int i;
1579
1580         /*
1581          *  If user excluded this chip, do not initialize it.
1582          *  I hate this code so much.  Must kill it.
1583          */
1584         if (io_port) {
1585                 for (i = 0 ; i < 8 ; i++) {
1586                         if (sym_driver_setup.excludes[i] == io_port)
1587                                 return -ENODEV;
1588                 }
1589         }
1590
1591         /*
1592          * Check if the chip is supported.  Then copy the chip description
1593          * to our device structure so we can make it match the actual device
1594          * and options.
1595          */
1596         pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
1597         chip = sym_lookup_chip_table(pdev->device, revision);
1598         if (!chip) {
1599                 dev_info(&pdev->dev, "device not supported\n");
1600                 return -ENODEV;
1601         }
1602         memcpy(&device->chip, chip, sizeof(device->chip));
1603         device->chip.revision_id = revision;
1604
1605         return 0;
1606 }
1607
1608 /*
1609  * Ignore Symbios chips controlled by various RAID controllers.
1610  * These controllers set value 0x52414944 at RAM end - 16.
1611  */
1612 static int __devinit sym_check_raid(struct sym_device *device)
1613 {
1614         unsigned int ram_size, ram_val;
1615
1616         if (!device->s.ramaddr)
1617                 return 0;
1618
1619         if (device->chip.features & FE_RAM8K)
1620                 ram_size = 8192;
1621         else
1622                 ram_size = 4096;
1623
1624         ram_val = readl(device->s.ramaddr + ram_size - 16);
1625         if (ram_val != 0x52414944)
1626                 return 0;
1627
1628         dev_info(&device->pdev->dev,
1629                         "not initializing, driven by RAID controller.\n");
1630         return -ENODEV;
1631 }
1632
1633 static int __devinit sym_set_workarounds(struct sym_device *device)
1634 {
1635         struct sym_chip *chip = &device->chip;
1636         struct pci_dev *pdev = device->pdev;
1637         u_short status_reg;
1638
1639         /*
1640          *  (ITEM 12 of a DEL about the 896 I haven't yet).
1641          *  We must ensure the chip will use WRITE AND INVALIDATE.
1642          *  The revision number limit is for now arbitrary.
1643          */
1644         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && chip->revision_id < 0x4) {
1645                 chip->features  |= (FE_WRIE | FE_CLSE);
1646         }
1647
1648         /* If the chip can do Memory Write Invalidate, enable it */
1649         if (chip->features & FE_WRIE) {
1650                 if (pci_set_mwi(pdev))
1651                         return -ENODEV;
1652         }
1653
1654         /*
1655          *  Work around for errant bit in 895A. The 66Mhz
1656          *  capable bit is set erroneously. Clear this bit.
1657          *  (Item 1 DEL 533)
1658          *
1659          *  Make sure Config space and Features agree.
1660          *
1661          *  Recall: writes are not normal to status register -
1662          *  write a 1 to clear and a 0 to leave unchanged.
1663          *  Can only reset bits.
1664          */
1665         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1666         if (chip->features & FE_66MHZ) {
1667                 if (!(status_reg & PCI_STATUS_66MHZ))
1668                         chip->features &= ~FE_66MHZ;
1669         } else {
1670                 if (status_reg & PCI_STATUS_66MHZ) {
1671                         status_reg = PCI_STATUS_66MHZ;
1672                         pci_write_config_word(pdev, PCI_STATUS, status_reg);
1673                         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1674                 }
1675         }
1676
1677         return 0;
1678 }
1679
1680 /*
1681  *  Read and check the PCI configuration for any detected NCR
1682  *  boards and save data for attaching after all boards have
1683  *  been detected.
1684  */
1685 static void __devinit
1686 sym_init_device(struct pci_dev *pdev, struct sym_device *device)
1687 {
1688         int i = 2;
1689         struct pci_bus_region bus_addr;
1690
1691         device->host_id = SYM_SETUP_HOST_ID;
1692         device->pdev = pdev;
1693
1694         pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[1]);
1695         device->mmio_base = bus_addr.start;
1696
1697         /*
1698          * If the BAR is 64-bit, resource 2 will be occupied by the
1699          * upper 32 bits
1700          */
1701         if (!pdev->resource[i].flags)
1702                 i++;
1703         pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[i]);
1704         device->ram_base = bus_addr.start;
1705
1706 #ifdef CONFIG_SCSI_SYM53C8XX_MMIO
1707         if (device->mmio_base)
1708                 device->s.ioaddr = pci_iomap(pdev, 1,
1709                                                 pci_resource_len(pdev, 1));
1710 #endif
1711         if (!device->s.ioaddr)
1712                 device->s.ioaddr = pci_iomap(pdev, 0,
1713                                                 pci_resource_len(pdev, 0));
1714         if (device->ram_base)
1715                 device->s.ramaddr = pci_iomap(pdev, i,
1716                                                 pci_resource_len(pdev, i));
1717 }
1718
1719 /*
1720  * The NCR PQS and PDS cards are constructed as a DEC bridge
1721  * behind which sits a proprietary NCR memory controller and
1722  * either four or two 53c875s as separate devices.  We can tell
1723  * if an 875 is part of a PQS/PDS or not since if it is, it will
1724  * be on the same bus as the memory controller.  In its usual
1725  * mode of operation, the 875s are slaved to the memory
1726  * controller for all transfers.  To operate with the Linux
1727  * driver, the memory controller is disabled and the 875s
1728  * freed to function independently.  The only wrinkle is that
1729  * the preset SCSI ID (which may be zero) must be read in from
1730  * a special configuration space register of the 875.
1731  */
1732 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1733 {
1734         int slot;
1735         u8 tmp;
1736
1737         for (slot = 0; slot < 256; slot++) {
1738                 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1739
1740                 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1741                         pci_dev_put(memc);
1742                         continue;
1743                 }
1744
1745                 /* bit 1: allow individual 875 configuration */
1746                 pci_read_config_byte(memc, 0x44, &tmp);
1747                 if ((tmp & 0x2) == 0) {
1748                         tmp |= 0x2;
1749                         pci_write_config_byte(memc, 0x44, tmp);
1750                 }
1751
1752                 /* bit 2: drive individual 875 interrupts to the bus */
1753                 pci_read_config_byte(memc, 0x45, &tmp);
1754                 if ((tmp & 0x4) == 0) {
1755                         tmp |= 0x4;
1756                         pci_write_config_byte(memc, 0x45, tmp);
1757                 }
1758
1759                 pci_dev_put(memc);
1760                 break;
1761         }
1762
1763         pci_read_config_byte(pdev, 0x84, &tmp);
1764         sym_dev->host_id = tmp;
1765 }
1766
1767 /*
1768  *  Called before unloading the module.
1769  *  Detach the host.
1770  *  We have to free resources and halt the NCR chip.
1771  */
1772 static int sym_detach(struct sym_hcb *np, struct pci_dev *pdev)
1773 {
1774         printk("%s: detaching ...\n", sym_name(np));
1775
1776         del_timer_sync(&np->s.timer);
1777
1778         /*
1779          * Reset NCR chip.
1780          * We should use sym_soft_reset(), but we don't want to do
1781          * so, since we may not be safe if interrupts occur.
1782          */
1783         printk("%s: resetting chip\n", sym_name(np));
1784         OUTB(np, nc_istat, SRST);
1785         INB(np, nc_mbox1);
1786         udelay(10);
1787         OUTB(np, nc_istat, 0);
1788
1789         sym_free_resources(np, pdev);
1790
1791         return 1;
1792 }
1793
1794 /*
1795  * Driver host template.
1796  */
1797 static struct scsi_host_template sym2_template = {
1798         .module                 = THIS_MODULE,
1799         .name                   = "sym53c8xx",
1800         .info                   = sym53c8xx_info,
1801         .queuecommand           = sym53c8xx_queue_command,
1802         .slave_alloc            = sym53c8xx_slave_alloc,
1803         .slave_configure        = sym53c8xx_slave_configure,
1804         .slave_destroy          = sym53c8xx_slave_destroy,
1805         .eh_abort_handler       = sym53c8xx_eh_abort_handler,
1806         .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1807         .eh_bus_reset_handler   = sym53c8xx_eh_bus_reset_handler,
1808         .eh_host_reset_handler  = sym53c8xx_eh_host_reset_handler,
1809         .this_id                = 7,
1810         .use_clustering         = ENABLE_CLUSTERING,
1811         .use_sg_chaining        = ENABLE_SG_CHAINING,
1812         .max_sectors            = 0xFFFF,
1813 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1814         .proc_info              = sym53c8xx_proc_info,
1815         .proc_name              = NAME53C8XX,
1816 #endif
1817 };
1818
1819 static int attach_count;
1820
1821 static int __devinit sym2_probe(struct pci_dev *pdev,
1822                                 const struct pci_device_id *ent)
1823 {
1824         struct sym_device sym_dev;
1825         struct sym_nvram nvram;
1826         struct Scsi_Host *instance;
1827
1828         memset(&sym_dev, 0, sizeof(sym_dev));
1829         memset(&nvram, 0, sizeof(nvram));
1830
1831         if (pci_enable_device(pdev))
1832                 goto leave;
1833
1834         pci_set_master(pdev);
1835
1836         if (pci_request_regions(pdev, NAME53C8XX))
1837                 goto disable;
1838
1839         sym_init_device(pdev, &sym_dev);
1840         if (sym_check_supported(&sym_dev))
1841                 goto free;
1842
1843         if (sym_check_raid(&sym_dev))
1844                 goto leave;     /* Don't disable the device */
1845
1846         if (sym_set_workarounds(&sym_dev))
1847                 goto free;
1848
1849         sym_config_pqs(pdev, &sym_dev);
1850
1851         sym_get_nvram(&sym_dev, &nvram);
1852
1853         instance = sym_attach(&sym2_template, attach_count, &sym_dev);
1854         if (!instance)
1855                 goto free;
1856
1857         if (scsi_add_host(instance, &pdev->dev))
1858                 goto detach;
1859         scsi_scan_host(instance);
1860
1861         attach_count++;
1862
1863         return 0;
1864
1865  detach:
1866         sym_detach(pci_get_drvdata(pdev), pdev);
1867  free:
1868         pci_release_regions(pdev);
1869  disable:
1870         pci_disable_device(pdev);
1871  leave:
1872         return -ENODEV;
1873 }
1874
1875 static void __devexit sym2_remove(struct pci_dev *pdev)
1876 {
1877         struct sym_hcb *np = pci_get_drvdata(pdev);
1878         struct Scsi_Host *host = np->s.host;
1879
1880         scsi_remove_host(host);
1881         scsi_host_put(host);
1882
1883         sym_detach(np, pdev);
1884
1885         pci_release_regions(pdev);
1886         pci_disable_device(pdev);
1887
1888         attach_count--;
1889 }
1890
1891 static void sym2_get_signalling(struct Scsi_Host *shost)
1892 {
1893         struct sym_hcb *np = sym_get_hcb(shost);
1894         enum spi_signal_type type;
1895
1896         switch (np->scsi_mode) {
1897         case SMODE_SE:
1898                 type = SPI_SIGNAL_SE;
1899                 break;
1900         case SMODE_LVD:
1901                 type = SPI_SIGNAL_LVD;
1902                 break;
1903         case SMODE_HVD:
1904                 type = SPI_SIGNAL_HVD;
1905                 break;
1906         default:
1907                 type = SPI_SIGNAL_UNKNOWN;
1908                 break;
1909         }
1910         spi_signalling(shost) = type;
1911 }
1912
1913 static void sym2_set_offset(struct scsi_target *starget, int offset)
1914 {
1915         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1916         struct sym_hcb *np = sym_get_hcb(shost);
1917         struct sym_tcb *tp = &np->target[starget->id];
1918
1919         tp->tgoal.offset = offset;
1920         tp->tgoal.check_nego = 1;
1921 }
1922
1923 static void sym2_set_period(struct scsi_target *starget, int period)
1924 {
1925         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1926         struct sym_hcb *np = sym_get_hcb(shost);
1927         struct sym_tcb *tp = &np->target[starget->id];
1928
1929         /* have to have DT for these transfers, but DT will also
1930          * set width, so check that this is allowed */
1931         if (period <= np->minsync && spi_width(starget))
1932                 tp->tgoal.dt = 1;
1933
1934         tp->tgoal.period = period;
1935         tp->tgoal.check_nego = 1;
1936 }
1937
1938 static void sym2_set_width(struct scsi_target *starget, int width)
1939 {
1940         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1941         struct sym_hcb *np = sym_get_hcb(shost);
1942         struct sym_tcb *tp = &np->target[starget->id];
1943
1944         /* It is illegal to have DT set on narrow transfers.  If DT is
1945          * clear, we must also clear IU and QAS.  */
1946         if (width == 0)
1947                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1948
1949         tp->tgoal.width = width;
1950         tp->tgoal.check_nego = 1;
1951 }
1952
1953 static void sym2_set_dt(struct scsi_target *starget, int dt)
1954 {
1955         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1956         struct sym_hcb *np = sym_get_hcb(shost);
1957         struct sym_tcb *tp = &np->target[starget->id];
1958
1959         /* We must clear QAS and IU if DT is clear */
1960         if (dt)
1961                 tp->tgoal.dt = 1;
1962         else
1963                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1964         tp->tgoal.check_nego = 1;
1965 }
1966
1967 #if 0
1968 static void sym2_set_iu(struct scsi_target *starget, int iu)
1969 {
1970         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1971         struct sym_hcb *np = sym_get_hcb(shost);
1972         struct sym_tcb *tp = &np->target[starget->id];
1973
1974         if (iu)
1975                 tp->tgoal.iu = tp->tgoal.dt = 1;
1976         else
1977                 tp->tgoal.iu = 0;
1978         tp->tgoal.check_nego = 1;
1979 }
1980
1981 static void sym2_set_qas(struct scsi_target *starget, int qas)
1982 {
1983         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1984         struct sym_hcb *np = sym_get_hcb(shost);
1985         struct sym_tcb *tp = &np->target[starget->id];
1986
1987         if (qas)
1988                 tp->tgoal.dt = tp->tgoal.qas = 1;
1989         else
1990                 tp->tgoal.qas = 0;
1991         tp->tgoal.check_nego = 1;
1992 }
1993 #endif
1994
1995 static struct spi_function_template sym2_transport_functions = {
1996         .set_offset     = sym2_set_offset,
1997         .show_offset    = 1,
1998         .set_period     = sym2_set_period,
1999         .show_period    = 1,
2000         .set_width      = sym2_set_width,
2001         .show_width     = 1,
2002         .set_dt         = sym2_set_dt,
2003         .show_dt        = 1,
2004 #if 0
2005         .set_iu         = sym2_set_iu,
2006         .show_iu        = 1,
2007         .set_qas        = sym2_set_qas,
2008         .show_qas       = 1,
2009 #endif
2010         .get_signalling = sym2_get_signalling,
2011 };
2012
2013 static struct pci_device_id sym2_id_table[] __devinitdata = {
2014         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2015           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2016         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2017           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2018         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2019           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2020         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2021           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2022         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2023           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2024         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2025           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2026         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2027           PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL },
2028         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2029           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2030         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2031           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2032         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2033           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2034         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2035           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2036         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2037           PCI_ANY_ID, PCI_ANY_ID,  PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL }, /* new */
2038         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2039           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2040         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2041           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2042         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2043           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2044         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2045           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2046         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2047           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2048         { 0, }
2049 };
2050
2051 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2052
2053 static struct pci_driver sym2_driver = {
2054         .name           = NAME53C8XX,
2055         .id_table       = sym2_id_table,
2056         .probe          = sym2_probe,
2057         .remove         = __devexit_p(sym2_remove),
2058 };
2059
2060 static int __init sym2_init(void)
2061 {
2062         int error;
2063
2064         sym2_setup_params();
2065         sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2066         if (!sym2_transport_template)
2067                 return -ENODEV;
2068
2069         error = pci_register_driver(&sym2_driver);
2070         if (error)
2071                 spi_release_transport(sym2_transport_template);
2072         return error;
2073 }
2074
2075 static void __exit sym2_exit(void)
2076 {
2077         pci_unregister_driver(&sym2_driver);
2078         spi_release_transport(sym2_transport_template);
2079 }
2080
2081 module_init(sym2_init);
2082 module_exit(sym2_exit);