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 /* SPARC just has to be different ... */
  58 #ifdef __sparc__
  59 #define IRQ_FMT "%s"
  60 #define IRQ_PRM(x) __irq_itoa(x)
  61 #else
  62 #define IRQ_FMT "%d"
  63 #define IRQ_PRM(x) (x)
  64 #endif
  65
  66 struct sym_driver_setup sym_driver_setup = SYM_LINUX_DRIVER_SETUP;
  67 unsigned int sym_debug_flags = 0;
  68
  69 static char *excl_string;
  70 static char *safe_string;
  71 module_param_named(cmd_per_lun, sym_driver_setup.max_tag, ushort, 0);
  72 module_param_string(tag_ctrl, sym_driver_setup.tag_ctrl, 100, 0);
  73 module_param_named(burst, sym_driver_setup.burst_order, byte, 0);
  74 module_param_named(led, sym_driver_setup.scsi_led, byte, 0);
  75 module_param_named(diff, sym_driver_setup.scsi_diff, byte, 0);
  76 module_param_named(irqm, sym_driver_setup.irq_mode, byte, 0);
  77 module_param_named(buschk, sym_driver_setup.scsi_bus_check, byte, 0);
  78 module_param_named(hostid, sym_driver_setup.host_id, byte, 0);
  79 module_param_named(verb, sym_driver_setup.verbose, byte, 0);
  80 module_param_named(debug, sym_debug_flags, uint, 0);
  81 module_param_named(settle, sym_driver_setup.settle_delay, byte, 0);
  82 module_param_named(nvram, sym_driver_setup.use_nvram, byte, 0);
  83 module_param_named(excl, excl_string, charp, 0);
  84 module_param_named(safe, safe_string, charp, 0);
  85
  86 MODULE_PARM_DESC(cmd_per_lun, "The maximum number of tags to use by default");
  87 MODULE_PARM_DESC(tag_ctrl, "More detailed control over tags per LUN");
  88 MODULE_PARM_DESC(burst, "Maximum burst.  0 to disable, 255 to read from registers");
  89 MODULE_PARM_DESC(led, "Set to 1 to enable LED support");
  90 MODULE_PARM_DESC(diff, "0 for no differential mode, 1 for BIOS, 2 for always, 3 for not GPIO3");
  91 MODULE_PARM_DESC(irqm, "0 for open drain, 1 to leave alone, 2 for totem pole");
  92 MODULE_PARM_DESC(buschk, "0 to not check, 1 for detach on error, 2 for warn on error");
  93 MODULE_PARM_DESC(hostid, "The SCSI ID to use for the host adapters");
  94 MODULE_PARM_DESC(verb, "0 for minimal verbosity, 1 for normal, 2 for excessive");
  95 MODULE_PARM_DESC(debug, "Set bits to enable debugging");
  96 MODULE_PARM_DESC(settle, "Settle delay in seconds.  Default 3");
  97 MODULE_PARM_DESC(nvram, "Option currently not used");
  98 MODULE_PARM_DESC(excl, "List ioport addresses here to prevent controllers from being attached");
  99 MODULE_PARM_DESC(safe, "Set other settings to a \"safe mode\"");
 100
 101 MODULE_LICENSE("GPL");
 102 MODULE_VERSION(SYM_VERSION);
 103 MODULE_AUTHOR("Matthew Wilcox <matthew@wil.cx>");
 104 MODULE_DESCRIPTION("NCR, Symbios and LSI 8xx and 1010 PCI SCSI adapters");
 105
 106 static void sym2_setup_params(void)
 107 {
 108         char *p = excl_string;
 109         int xi = 0;
 110
 111         while (p && (xi < 8)) {
 112                 char *next_p;
 113                 int val = (int) simple_strtoul(p, &next_p, 0);
 114                 sym_driver_setup.excludes[xi++] = val;
 115                 p = next_p;
 116         }
 117
 118         if (safe_string) {
 119                 if (*safe_string == 'y') {
 120                         sym_driver_setup.max_tag = 0;
 121                         sym_driver_setup.burst_order = 0;
 122                         sym_driver_setup.scsi_led = 0;
 123                         sym_driver_setup.scsi_diff = 1;
 124                         sym_driver_setup.irq_mode = 0;
 125                         sym_driver_setup.scsi_bus_check = 2;
 126                         sym_driver_setup.host_id = 7;
 127                         sym_driver_setup.verbose = 2;
 128                         sym_driver_setup.settle_delay = 10;
 129                         sym_driver_setup.use_nvram = 1;
 130                 } else if (*safe_string != 'n') {
 131                         printk(KERN_WARNING NAME53C8XX "Ignoring parameter %s"
 132                                         " passed to safe option", safe_string);
 133                 }
 134         }
 135 }
 136
 137 /*
 138  * We used to try to deal with 64-bit BARs here, but don't any more.
 139  * There are many parts of this driver which would need to be modified
 140  * to handle a 64-bit base address, including scripts.  I'm uncomfortable
 141  * with making those changes when I have no way of testing it, so I'm
 142  * just going to disable it.
 143  *
 144  * Note that some machines (eg HP rx8620 and Superdome) have bus addresses
 145  * below 4GB and physical addresses above 4GB.  These will continue to work.
 146  */
 147 static int __devinit
 148 pci_get_base_address(struct pci_dev *pdev, int index, unsigned long *basep)
 149 {
 150         u32 tmp;
 151         unsigned long base;
 152 #define PCI_BAR_OFFSET(index) (PCI_BASE_ADDRESS_0 + (index<<2))
 153
 154         pci_read_config_dword(pdev, PCI_BAR_OFFSET(index++), &tmp);
 155         base = tmp;
 156         if ((tmp & 0x7) == PCI_BASE_ADDRESS_MEM_TYPE_64) {
 157                 pci_read_config_dword(pdev, PCI_BAR_OFFSET(index++), &tmp);
 158                 if (tmp > 0) {
 159                         dev_err(&pdev->dev,
 160                                 "BAR %d is 64-bit, disabling\n", index - 1);
 161                         base = 0;
 162                 }
 163         }
 164
 165         if ((base & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
 166                 base &= PCI_BASE_ADDRESS_IO_MASK;
 167         } else {
 168                 base &= PCI_BASE_ADDRESS_MEM_MASK;
 169         }
 170
 171         *basep = base;
 172         return index;
 173 #undef PCI_BAR_OFFSET
 174 }
 175
 176 static struct scsi_transport_template *sym2_transport_template = NULL;
 177
 178 /*
 179  *  Used by the eh thread to wait for command completion.
 180  *  It is allocated on the eh thread stack.
 181  */
 182 struct sym_eh_wait {
 183         struct completion done;
 184         struct timer_list timer;
 185         void (*old_done)(struct scsi_cmnd *);
 186         int to_do;
 187         int timed_out;
 188 };
 189
 190 /*
 191  *  Driver private area in the SCSI command structure.
 192  */
 193 struct sym_ucmd {               /* Override the SCSI pointer structure */
 194         dma_addr_t data_mapping;
 195         u_char  data_mapped;
 196         struct sym_eh_wait *eh_wait;
 197 };
 198
 199 #define SYM_UCMD_PTR(cmd)  ((struct sym_ucmd *)(&(cmd)->SCp))
 200 #define SYM_SOFTC_PTR(cmd) sym_get_hcb(cmd->device->host)
 201
 202 static void __unmap_scsi_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
 203 {
 204         int dma_dir = cmd->sc_data_direction;
 205
 206         switch(SYM_UCMD_PTR(cmd)->data_mapped) {
 207         case 2:
 208                 pci_unmap_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
 209                 break;
 210         case 1:
 211                 pci_unmap_single(pdev, SYM_UCMD_PTR(cmd)->data_mapping,
 212                                  cmd->request_bufflen, dma_dir);
 213                 break;
 214         }
 215         SYM_UCMD_PTR(cmd)->data_mapped = 0;
 216 }
 217
 218 static dma_addr_t __map_scsi_single_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
 219 {
 220         dma_addr_t mapping;
 221         int dma_dir = cmd->sc_data_direction;
 222
 223         mapping = pci_map_single(pdev, cmd->request_buffer,
 224                                  cmd->request_bufflen, dma_dir);
 225         if (mapping) {
 226                 SYM_UCMD_PTR(cmd)->data_mapped  = 1;
 227                 SYM_UCMD_PTR(cmd)->data_mapping = mapping;
 228         }
 229
 230         return mapping;
 231 }
 232
 233 static int __map_scsi_sg_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
 234 {
 235         int use_sg;
 236         int dma_dir = cmd->sc_data_direction;
 237
 238         use_sg = pci_map_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
 239         if (use_sg > 0) {
 240                 SYM_UCMD_PTR(cmd)->data_mapped  = 2;
 241                 SYM_UCMD_PTR(cmd)->data_mapping = use_sg;
 242         }
 243
 244         return use_sg;
 245 }
 246
 247 #define unmap_scsi_data(np, cmd)        \
 248                 __unmap_scsi_data(np->s.device, cmd)
 249 #define map_scsi_single_data(np, cmd)   \
 250                 __map_scsi_single_data(np->s.device, cmd)
 251 #define map_scsi_sg_data(np, cmd)       \
 252                 __map_scsi_sg_data(np->s.device, cmd)
 253 /*
 254  *  Complete a pending CAM CCB.
 255  */
 256 void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *cmd)
 257 {
 258         unmap_scsi_data(np, cmd);
 259         cmd->scsi_done(cmd);
 260 }
 261
 262 static void sym_xpt_done2(struct sym_hcb *np, struct scsi_cmnd *cmd, int cam_status)
 263 {
 264         sym_set_cam_status(cmd, cam_status);
 265         sym_xpt_done(np, cmd);
 266 }
 267
 268
 269 /*
 270  *  Tell the SCSI layer about a BUS RESET.
 271  */
 272 void sym_xpt_async_bus_reset(struct sym_hcb *np)
 273 {
 274         printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
 275         np->s.settle_time = jiffies + sym_driver_setup.settle_delay * HZ;
 276         np->s.settle_time_valid = 1;
 277         if (sym_verbose >= 2)
 278                 printf_info("%s: command processing suspended for %d seconds\n",
 279                             sym_name(np), sym_driver_setup.settle_delay);
 280 }
 281
 282 /*
 283  *  Tell the SCSI layer about a BUS DEVICE RESET message sent.
 284  */
 285 void sym_xpt_async_sent_bdr(struct sym_hcb *np, int target)
 286 {
 287         printf_notice("%s: TARGET %d has been reset.\n", sym_name(np), target);
 288 }
 289
 290 /*
 291  *  Choose the more appropriate CAM status if
 292  *  the IO encountered an extended error.
 293  */
 294 static int sym_xerr_cam_status(int cam_status, int x_status)
 295 {
 296         if (x_status) {
 297                 if      (x_status & XE_PARITY_ERR)
 298                         cam_status = DID_PARITY;
 299                 else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN))
 300                         cam_status = DID_ERROR;
 301                 else if (x_status & XE_BAD_PHASE)
 302                         cam_status = DID_ERROR;
 303                 else
 304                         cam_status = DID_ERROR;
 305         }
 306         return cam_status;
 307 }
 308
 309 /*
 310  *  Build CAM result for a failed or auto-sensed IO.
 311  */
 312 void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid)
 313 {
 314         struct scsi_cmnd *cmd = cp->cmd;
 315         u_int cam_status, scsi_status, drv_status;
 316
 317         drv_status  = 0;
 318         cam_status  = DID_OK;
 319         scsi_status = cp->ssss_status;
 320
 321         if (cp->host_flags & HF_SENSE) {
 322                 scsi_status = cp->sv_scsi_status;
 323                 resid = cp->sv_resid;
 324                 if (sym_verbose && cp->sv_xerr_status)
 325                         sym_print_xerr(cmd, cp->sv_xerr_status);
 326                 if (cp->host_status == HS_COMPLETE &&
 327                     cp->ssss_status == S_GOOD &&
 328                     cp->xerr_status == 0) {
 329                         cam_status = sym_xerr_cam_status(DID_OK,
 330                                                          cp->sv_xerr_status);
 331                         drv_status = DRIVER_SENSE;
 332                         /*
 333                          *  Bounce back the sense data to user.
 334                          */
 335                         memset(&cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
 336                         memcpy(cmd->sense_buffer, cp->sns_bbuf,
 337                               min(sizeof(cmd->sense_buffer),
 338                                   (size_t)SYM_SNS_BBUF_LEN));
 339 #if 0
 340                         /*
 341                          *  If the device reports a UNIT ATTENTION condition
 342                          *  due to a RESET condition, we should consider all
 343                          *  disconnect CCBs for this unit as aborted.
 344                          */
 345                         if (1) {
 346                                 u_char *p;
 347                                 p  = (u_char *) cmd->sense_data;
 348                                 if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
 349                                         sym_clear_tasks(np, DID_ABORT,
 350                                                         cp->target,cp->lun, -1);
 351                         }
 352 #endif
 353                 } else {
 354                         /*
 355                          * Error return from our internal request sense.  This
 356                          * is bad: we must clear the contingent allegiance
 357                          * condition otherwise the device will always return
 358                          * BUSY.  Use a big stick.
 359                          */
 360                         sym_reset_scsi_target(np, cmd->device->id);
 361                         cam_status = DID_ERROR;
 362                 }
 363         } else if (cp->host_status == HS_COMPLETE)      /* Bad SCSI status */
 364                 cam_status = DID_OK;
 365         else if (cp->host_status == HS_SEL_TIMEOUT)     /* Selection timeout */
 366                 cam_status = DID_NO_CONNECT;
 367         else if (cp->host_status == HS_UNEXPECTED)      /* Unexpected BUS FREE*/
 368                 cam_status = DID_ERROR;
 369         else {                                          /* Extended error */
 370                 if (sym_verbose) {
 371                         sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
 372                                 cp->host_status, cp->ssss_status,
 373                                 cp->xerr_status);
 374                 }
 375                 /*
 376                  *  Set the most appropriate value for CAM status.
 377                  */
 378                 cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
 379         }
 380         cmd->resid = resid;
 381         cmd->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
 382 }
 383
 384
 385 /*
 386  *  Build the scatter/gather array for an I/O.
 387  */
 388
 389 static int sym_scatter_no_sglist(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
 390 {
 391         struct sym_tblmove *data = &cp->phys.data[SYM_CONF_MAX_SG-1];
 392         int segment;
 393         unsigned int len = cmd->request_bufflen;
 394
 395         if (len) {
 396                 dma_addr_t baddr = map_scsi_single_data(np, cmd);
 397                 if (baddr) {
 398                         if (len & 1) {
 399                                 struct sym_tcb *tp = &np->target[cp->target];
 400                                 if (tp->head.wval & EWS) {
 401                                         len++;
 402                                         cp->odd_byte_adjustment++;
 403                                 }
 404                         }
 405                         cp->data_len = len;
 406                         sym_build_sge(np, data, baddr, len);
 407                         segment = 1;
 408                 } else {
 409                         segment = -2;
 410                 }
 411         } else {
 412                 segment = 0;
 413         }
 414
 415         return segment;
 416 }
 417
 418 static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
 419 {
 420         int segment;
 421         int use_sg = (int) cmd->use_sg;
 422
 423         cp->data_len = 0;
 424
 425         if (!use_sg)
 426                 segment = sym_scatter_no_sglist(np, cp, cmd);
 427         else if ((use_sg = map_scsi_sg_data(np, cmd)) > 0) {
 428                 struct scatterlist *scatter = (struct scatterlist *)cmd->buffer;
 429                 struct sym_tcb *tp = &np->target[cp->target];
 430                 struct sym_tblmove *data;
 431
 432                 if (use_sg > SYM_CONF_MAX_SG) {
 433                         unmap_scsi_data(np, cmd);
 434                         return -1;
 435                 }
 436
 437                 data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
 438
 439                 for (segment = 0; segment < use_sg; segment++) {
 440                         dma_addr_t baddr = sg_dma_address(&scatter[segment]);
 441                         unsigned int len = sg_dma_len(&scatter[segment]);
 442
 443                         if ((len & 1) && (tp->head.wval & EWS)) {
 444                                 len++;
 445                                 cp->odd_byte_adjustment++;
 446                         }
 447
 448                         sym_build_sge(np, &data[segment], baddr, len);
 449                         cp->data_len += len;
 450                 }
 451         } else {
 452                 segment = -2;
 453         }
 454
 455         return segment;
 456 }
 457
 458 /*
 459  *  Queue a SCSI command.
 460  */
 461 static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd)
 462 {
 463         struct scsi_device *sdev = cmd->device;
 464         struct sym_tcb *tp;
 465         struct sym_lcb *lp;
 466         struct sym_ccb *cp;
 467         int     order;
 468
 469         /*
 470          *  Minimal checkings, so that we will not
 471          *  go outside our tables.
 472          */
 473         if (sdev->id == np->myaddr) {
 474                 sym_xpt_done2(np, cmd, DID_NO_CONNECT);
 475                 return 0;
 476         }
 477
 478         /*
 479          *  Retrieve the target descriptor.
 480          */
 481         tp = &np->target[sdev->id];
 482
 483         /*
 484          *  Select tagged/untagged.
 485          */
 486         lp = sym_lp(tp, sdev->lun);
 487         order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
 488
 489         /*
 490          *  Queue the SCSI IO.
 491          */
 492         cp = sym_get_ccb(np, cmd, order);
 493         if (!cp)
 494                 return 1;       /* Means resource shortage */
 495         sym_queue_scsiio(np, cmd, cp);
 496         return 0;
 497 }
 498
 499 /*
 500  *  Setup buffers and pointers that address the CDB.
 501  */
 502 static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
 503 {
 504         memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len);
 505
 506         cp->phys.cmd.addr = CCB_BA(cp, cdb_buf[0]);
 507         cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
 508
 509         return 0;
 510 }
 511
 512 /*
 513  *  Setup pointers that address the data and start the I/O.
 514  */
 515 int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
 516 {
 517         int dir;
 518         struct sym_tcb *tp = &np->target[cp->target];
 519         struct sym_lcb *lp = sym_lp(tp, cp->lun);
 520
 521         /*
 522          *  Build the CDB.
 523          */
 524         if (sym_setup_cdb(np, cmd, cp))
 525                 goto out_abort;
 526
 527         /*
 528          *  No direction means no data.
 529          */
 530         dir = cmd->sc_data_direction;
 531         if (dir != DMA_NONE) {
 532                 cp->segments = sym_scatter(np, cp, cmd);
 533                 if (cp->segments < 0) {
 534                         sym_set_cam_status(cmd, DID_ERROR);
 535                         goto out_abort;
 536                 }
 537         } else {
 538                 cp->data_len = 0;
 539                 cp->segments = 0;
 540         }
 541
 542         /*
 543          *  Set data pointers.
 544          */
 545         sym_setup_data_pointers(np, cp, dir);
 546
 547         /*
 548          *  When `#ifed 1', the code below makes the driver
 549          *  panic on the first attempt to write to a SCSI device.
 550          *  It is the first test we want to do after a driver
 551          *  change that does not seem obviously safe. :)
 552          */
 553 #if 0
 554         switch (cp->cdb_buf[0]) {
 555         case 0x0A: case 0x2A: case 0xAA:
 556                 panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
 557                 break;
 558         default:
 559                 break;
 560         }
 561 #endif
 562
 563         /*
 564          *      activate this job.
 565          */
 566         if (lp)
 567                 sym_start_next_ccbs(np, lp, 2);
 568         else
 569                 sym_put_start_queue(np, cp);
 570         return 0;
 571
 572 out_abort:
 573         sym_free_ccb(np, cp);
 574         sym_xpt_done(np, cmd);
 575         return 0;
 576 }
 577
 578
 579 /*
 580  *  timer daemon.
 581  *
 582  *  Misused to keep the driver running when
 583  *  interrupts are not configured correctly.
 584  */
 585 static void sym_timer(struct sym_hcb *np)
 586 {
 587         unsigned long thistime = jiffies;
 588
 589         /*
 590          *  Restart the timer.
 591          */
 592         np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
 593         add_timer(&np->s.timer);
 594
 595         /*
 596          *  If we are resetting the ncr, wait for settle_time before
 597          *  clearing it. Then command processing will be resumed.
 598          */
 599         if (np->s.settle_time_valid) {
 600                 if (time_before_eq(np->s.settle_time, thistime)) {
 601                         if (sym_verbose >= 2 )
 602                                 printk("%s: command processing resumed\n",
 603                                        sym_name(np));
 604                         np->s.settle_time_valid = 0;
 605                 }
 606                 return;
 607         }
 608
 609         /*
 610          *      Nothing to do for now, but that may come.
 611          */
 612         if (np->s.lasttime + 4*HZ < thistime) {
 613                 np->s.lasttime = thistime;
 614         }
 615
 616 #ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
 617         /*
 618          *  Some way-broken PCI bridges may lead to
 619          *  completions being lost when the clearing
 620          *  of the INTFLY flag by the CPU occurs
 621          *  concurrently with the chip raising this flag.
 622          *  If this ever happen, lost completions will
 623          * be reaped here.
 624          */
 625         sym_wakeup_done(np);
 626 #endif
 627 }
 628
 629
 630 /*
 631  *  PCI BUS error handler.
 632  */
 633 void sym_log_bus_error(struct sym_hcb *np)
 634 {
 635         u_short pci_sts;
 636         pci_read_config_word(np->s.device, PCI_STATUS, &pci_sts);
 637         if (pci_sts & 0xf900) {
 638                 pci_write_config_word(np->s.device, PCI_STATUS, pci_sts);
 639                 printf("%s: PCI STATUS = 0x%04x\n",
 640                         sym_name(np), pci_sts & 0xf900);
 641         }
 642 }
 643
 644 /*
 645  * queuecommand method.  Entered with the host adapter lock held and
 646  * interrupts disabled.
 647  */
 648 static int sym53c8xx_queue_command(struct scsi_cmnd *cmd,
 649                                         void (*done)(struct scsi_cmnd *))
 650 {
 651         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
 652         struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
 653         int sts = 0;
 654
 655         cmd->scsi_done     = done;
 656         memset(ucp, 0, sizeof(*ucp));
 657
 658         /*
 659          *  Shorten our settle_time if needed for
 660          *  this command not to time out.
 661          */
 662         if (np->s.settle_time_valid && cmd->timeout_per_command) {
 663                 unsigned long tlimit = jiffies + cmd->timeout_per_command;
 664                 tlimit -= SYM_CONF_TIMER_INTERVAL*2;
 665                 if (time_after(np->s.settle_time, tlimit)) {
 666                         np->s.settle_time = tlimit;
 667                 }
 668         }
 669
 670         if (np->s.settle_time_valid)
 671                 return SCSI_MLQUEUE_HOST_BUSY;
 672
 673         sts = sym_queue_command(np, cmd);
 674         if (sts)
 675                 return SCSI_MLQUEUE_HOST_BUSY;
 676         return 0;
 677 }
 678
 679 /*
 680  *  Linux entry point of the interrupt handler.
 681  */
 682 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs)
 683 {
 684         unsigned long flags;
 685         struct sym_hcb *np = (struct sym_hcb *)dev_id;
 686
 687         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
 688
 689         spin_lock_irqsave(np->s.host->host_lock, flags);
 690         sym_interrupt(np);
 691         spin_unlock_irqrestore(np->s.host->host_lock, flags);
 692
 693         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
 694
 695         return IRQ_HANDLED;
 696 }
 697
 698 /*
 699  *  Linux entry point of the timer handler
 700  */
 701 static void sym53c8xx_timer(unsigned long npref)
 702 {
 703         struct sym_hcb *np = (struct sym_hcb *)npref;
 704         unsigned long flags;
 705
 706         spin_lock_irqsave(np->s.host->host_lock, flags);
 707         sym_timer(np);
 708         spin_unlock_irqrestore(np->s.host->host_lock, flags);
 709 }
 710
 711
 712 /*
 713  *  What the eh thread wants us to perform.
 714  */
 715 #define SYM_EH_ABORT            0
 716 #define SYM_EH_DEVICE_RESET     1
 717 #define SYM_EH_BUS_RESET        2
 718 #define SYM_EH_HOST_RESET       3
 719
 720 /*
 721  *  What we will do regarding the involved SCSI command.
 722  */
 723 #define SYM_EH_DO_IGNORE        0
 724 #define SYM_EH_DO_COMPLETE      1
 725 #define SYM_EH_DO_WAIT          2
 726
 727 /*
 728  *  Our general completion handler.
 729  */
 730 static void __sym_eh_done(struct scsi_cmnd *cmd, int timed_out)
 731 {
 732         struct sym_eh_wait *ep = SYM_UCMD_PTR(cmd)->eh_wait;
 733         if (!ep)
 734                 return;
 735
 736         /* Try to avoid a race here (not 100% safe) */
 737         if (!timed_out) {
 738                 ep->timed_out = 0;
 739                 if (ep->to_do == SYM_EH_DO_WAIT && !del_timer(&ep->timer))
 740                         return;
 741         }
 742
 743         /* Revert everything */
 744         SYM_UCMD_PTR(cmd)->eh_wait = NULL;
 745         cmd->scsi_done = ep->old_done;
 746
 747         /* Wake up the eh thread if it wants to sleep */
 748         if (ep->to_do == SYM_EH_DO_WAIT)
 749                 complete(&ep->done);
 750 }
 751
 752 /*
 753  *  scsi_done() alias when error recovery is in progress.
 754  */
 755 static void sym_eh_done(struct scsi_cmnd *cmd) { __sym_eh_done(cmd, 0); }
 756
 757 /*
 758  *  Some timeout handler to avoid waiting too long.
 759  */
 760 static void sym_eh_timeout(u_long p) { __sym_eh_done((struct scsi_cmnd *)p, 1); }
 761
 762 /*
 763  *  Generic method for our eh processing.
 764  *  The 'op' argument tells what we have to do.
 765  */
 766 static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
 767 {
 768         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
 769         SYM_QUEHEAD *qp;
 770         int to_do = SYM_EH_DO_IGNORE;
 771         int sts = -1;
 772         struct sym_eh_wait eh, *ep = &eh;
 773
 774         dev_warn(&cmd->device->sdev_gendev, "%s operation started.\n", opname);
 775
 776         /* This one is queued in some place -> to wait for completion */
 777         FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
 778                 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
 779                 if (cp->cmd == cmd) {
 780                         to_do = SYM_EH_DO_WAIT;
 781                         goto prepare;
 782                 }
 783         }
 784
 785 prepare:
 786         /* Prepare stuff to either ignore, complete or wait for completion */
 787         switch(to_do) {
 788         default:
 789         case SYM_EH_DO_IGNORE:
 790                 break;
 791         case SYM_EH_DO_WAIT:
 792                 init_completion(&ep->done);
 793                 /* fall through */
 794         case SYM_EH_DO_COMPLETE:
 795                 ep->old_done = cmd->scsi_done;
 796                 cmd->scsi_done = sym_eh_done;
 797                 SYM_UCMD_PTR(cmd)->eh_wait = ep;
 798         }
 799
 800         /* Try to proceed the operation we have been asked for */
 801         sts = -1;
 802         switch(op) {
 803         case SYM_EH_ABORT:
 804                 sts = sym_abort_scsiio(np, cmd, 1);
 805                 break;
 806         case SYM_EH_DEVICE_RESET:
 807                 sts = sym_reset_scsi_target(np, cmd->device->id);
 808                 break;
 809         case SYM_EH_BUS_RESET:
 810                 sym_reset_scsi_bus(np, 1);
 811                 sts = 0;
 812                 break;
 813         case SYM_EH_HOST_RESET:
 814                 sym_reset_scsi_bus(np, 0);
 815                 sym_start_up (np, 1);
 816                 sts = 0;
 817                 break;
 818         default:
 819                 break;
 820         }
 821
 822         /* On error, restore everything and cross fingers :) */
 823         if (sts) {
 824                 SYM_UCMD_PTR(cmd)->eh_wait = NULL;
 825                 cmd->scsi_done = ep->old_done;
 826                 to_do = SYM_EH_DO_IGNORE;
 827         }
 828
 829         ep->to_do = to_do;
 830         /* Complete the command with locks held as required by the driver */
 831         if (to_do == SYM_EH_DO_COMPLETE)
 832                 sym_xpt_done2(np, cmd, DID_ABORT);
 833
 834         /* Wait for completion with locks released, as required by kernel */
 835         if (to_do == SYM_EH_DO_WAIT) {
 836                 init_timer(&ep->timer);
 837                 ep->timer.expires = jiffies + (5*HZ);
 838                 ep->timer.function = sym_eh_timeout;
 839                 ep->timer.data = (u_long)cmd;
 840                 ep->timed_out = 1;      /* Be pessimistic for once :) */
 841                 add_timer(&ep->timer);
 842                 spin_unlock_irq(np->s.host->host_lock);
 843                 wait_for_completion(&ep->done);
 844                 spin_lock_irq(np->s.host->host_lock);
 845                 if (ep->timed_out)
 846                         sts = -2;
 847         }
 848         dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
 849                         sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
 850         return sts ? SCSI_FAILED : SCSI_SUCCESS;
 851 }
 852
 853
 854 /*
 855  * Error handlers called from the eh thread (one thread per HBA).
 856  */
 857 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
 858 {
 859         int rc;
 860
 861         spin_lock_irq(cmd->device->host->host_lock);
 862         rc = sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
 863         spin_unlock_irq(cmd->device->host->host_lock);
 864
 865         return rc;
 866 }
 867
 868 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
 869 {
 870         int rc;
 871
 872         spin_lock_irq(cmd->device->host->host_lock);
 873         rc = sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
 874         spin_unlock_irq(cmd->device->host->host_lock);
 875
 876         return rc;
 877 }
 878
 879 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
 880 {
 881         int rc;
 882
 883         spin_lock_irq(cmd->device->host->host_lock);
 884         rc = sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
 885         spin_unlock_irq(cmd->device->host->host_lock);
 886
 887         return rc;
 888 }
 889
 890 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
 891 {
 892         int rc;
 893
 894         spin_lock_irq(cmd->device->host->host_lock);
 895         rc = sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
 896         spin_unlock_irq(cmd->device->host->host_lock);
 897
 898         return rc;
 899 }
 900
 901 /*
 902  *  Tune device queuing depth, according to various limits.
 903  */
 904 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
 905 {
 906         struct sym_lcb *lp = sym_lp(tp, lun);
 907         u_short oldtags;
 908
 909         if (!lp)
 910                 return;
 911
 912         oldtags = lp->s.reqtags;
 913
 914         if (reqtags > lp->s.scdev_depth)
 915                 reqtags = lp->s.scdev_depth;
 916
 917         lp->started_limit = reqtags ? reqtags : 2;
 918         lp->started_max   = 1;
 919         lp->s.reqtags     = reqtags;
 920
 921         if (reqtags != oldtags) {
 922                 dev_info(&tp->starget->dev,
 923                          "tagged command queuing %s, command queue depth %d.\n",
 924                           lp->s.reqtags ? "enabled" : "disabled",
 925                           lp->started_limit);
 926         }
 927 }
 928
 929 /*
 930  *  Linux select queue depths function
 931  */
 932 #define DEF_DEPTH       (sym_driver_setup.max_tag)
 933 #define ALL_TARGETS     -2
 934 #define NO_TARGET       -1
 935 #define ALL_LUNS        -2
 936 #define NO_LUN          -1
 937
 938 static int device_queue_depth(struct sym_hcb *np, int target, int lun)
 939 {
 940         int c, h, t, u, v;
 941         char *p = sym_driver_setup.tag_ctrl;
 942         char *ep;
 943
 944         h = -1;
 945         t = NO_TARGET;
 946         u = NO_LUN;
 947         while ((c = *p++) != 0) {
 948                 v = simple_strtoul(p, &ep, 0);
 949                 switch(c) {
 950                 case '/':
 951                         ++h;
 952                         t = ALL_TARGETS;
 953                         u = ALL_LUNS;
 954                         break;
 955                 case 't':
 956                         if (t != target)
 957                                 t = (target == v) ? v : NO_TARGET;
 958                         u = ALL_LUNS;
 959                         break;
 960                 case 'u':
 961                         if (u != lun)
 962                                 u = (lun == v) ? v : NO_LUN;
 963                         break;
 964                 case 'q':
 965                         if (h == np->s.unit &&
 966                                 (t == ALL_TARGETS || t == target) &&
 967                                 (u == ALL_LUNS    || u == lun))
 968                                 return v;
 969                         break;
 970                 case '-':
 971                         t = ALL_TARGETS;
 972                         u = ALL_LUNS;
 973                         break;
 974                 default:
 975                         break;
 976                 }
 977                 p = ep;
 978         }
 979         return DEF_DEPTH;
 980 }
 981
 982 static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
 983 {
 984         struct sym_hcb *np;
 985         struct sym_tcb *tp;
 986
 987         if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
 988                 return -ENXIO;
 989
 990         np = sym_get_hcb(sdev->host);
 991         tp = &np->target[sdev->id];
 992
 993         /*
 994          * Fail the device init if the device is flagged NOSCAN at BOOT in
 995          * the NVRAM.  This may speed up boot and maintain coherency with
 996          * BIOS device numbering.  Clearing the flag allows the user to
 997          * rescan skipped devices later.  We also return an error for
 998          * devices not flagged for SCAN LUNS in the NVRAM since some single
 999          * lun devices behave badly when asked for a non zero LUN.
1000          */
1001
1002         if ((tp->usrflags & SYM_SCAN_BOOT_DISABLED) ||
1003             ((tp->usrflags & SYM_SCAN_LUNS_DISABLED) && sdev->lun != 0)) {
1004                 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
1005                 return -ENXIO;
1006         }
1007
1008         tp->starget = sdev->sdev_target;
1009         return 0;
1010 }
1011
1012 /*
1013  * Linux entry point for device queue sizing.
1014  */
1015 static int sym53c8xx_slave_configure(struct scsi_device *device)
1016 {
1017         struct sym_hcb *np = sym_get_hcb(device->host);
1018         struct sym_tcb *tp = &np->target[device->id];
1019         struct sym_lcb *lp;
1020         int reqtags, depth_to_use;
1021
1022         /*
1023          *  Allocate the LCB if not yet.
1024          *  If it fail, we may well be in the sh*t. :)
1025          */
1026         lp = sym_alloc_lcb(np, device->id, device->lun);
1027         if (!lp)
1028                 return -ENOMEM;
1029
1030         /*
1031          *  Get user flags.
1032          */
1033         lp->curr_flags = lp->user_flags;
1034
1035         /*
1036          *  Select queue depth from driver setup.
1037          *  Donnot use more than configured by user.
1038          *  Use at least 2.
1039          *  Donnot use more than our maximum.
1040          */
1041         reqtags = device_queue_depth(np, device->id, device->lun);
1042         if (reqtags > tp->usrtags)
1043                 reqtags = tp->usrtags;
1044         if (!device->tagged_supported)
1045                 reqtags = 0;
1046 #if 1 /* Avoid to locally queue commands for no good reasons */
1047         if (reqtags > SYM_CONF_MAX_TAG)
1048                 reqtags = SYM_CONF_MAX_TAG;
1049         depth_to_use = (reqtags ? reqtags : 2);
1050 #else
1051         depth_to_use = (reqtags ? SYM_CONF_MAX_TAG : 2);
1052 #endif
1053         scsi_adjust_queue_depth(device,
1054                                 (device->tagged_supported ?
1055                                  MSG_SIMPLE_TAG : 0),
1056                                 depth_to_use);
1057         lp->s.scdev_depth = depth_to_use;
1058         sym_tune_dev_queuing(tp, device->lun, reqtags);
1059
1060         if (!spi_initial_dv(device->sdev_target))
1061                 spi_dv_device(device);
1062
1063         return 0;
1064 }
1065
1066 /*
1067  *  Linux entry point for info() function
1068  */
1069 static const char *sym53c8xx_info (struct Scsi_Host *host)
1070 {
1071         return SYM_DRIVER_NAME;
1072 }
1073
1074
1075 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1076 /*
1077  *  Proc file system stuff
1078  *
1079  *  A read operation returns adapter information.
1080  *  A write operation is a control command.
1081  *  The string is parsed in the driver code and the command is passed
1082  *  to the sym_usercmd() function.
1083  */
1084
1085 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1086
1087 struct  sym_usrcmd {
1088         u_long  target;
1089         u_long  lun;
1090         u_long  data;
1091         u_long  cmd;
1092 };
1093
1094 #define UC_SETSYNC      10
1095 #define UC_SETTAGS      11
1096 #define UC_SETDEBUG     12
1097 #define UC_SETWIDE      14
1098 #define UC_SETFLAG      15
1099 #define UC_SETVERBOSE   17
1100 #define UC_RESETDEV     18
1101 #define UC_CLEARDEV     19
1102
1103 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
1104 {
1105         struct sym_tcb *tp;
1106         int t, l;
1107
1108         switch (uc->cmd) {
1109         case 0: return;
1110
1111 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1112         case UC_SETDEBUG:
1113                 sym_debug_flags = uc->data;
1114                 break;
1115 #endif
1116         case UC_SETVERBOSE:
1117                 np->verbose = uc->data;
1118                 break;
1119         default:
1120                 /*
1121                  * We assume that other commands apply to targets.
1122                  * This should always be the case and avoid the below
1123                  * 4 lines to be repeated 6 times.
1124                  */
1125                 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
1126                         if (!((uc->target >> t) & 1))
1127                                 continue;
1128                         tp = &np->target[t];
1129
1130                         switch (uc->cmd) {
1131
1132                         case UC_SETSYNC:
1133                                 if (!uc->data || uc->data >= 255) {
1134                                         tp->tgoal.iu = tp->tgoal.dt =
1135                                                 tp->tgoal.qas = 0;
1136                                         tp->tgoal.offset = 0;
1137                                 } else if (uc->data <= 9 && np->minsync_dt) {
1138                                         if (uc->data < np->minsync_dt)
1139                                                 uc->data = np->minsync_dt;
1140                                         tp->tgoal.iu = tp->tgoal.dt =
1141                                                 tp->tgoal.qas = 1;
1142                                         tp->tgoal.width = 1;
1143                                         tp->tgoal.period = uc->data;
1144                                         tp->tgoal.offset = np->maxoffs_dt;
1145                                 } else {
1146                                         if (uc->data < np->minsync)
1147                                                 uc->data = np->minsync;
1148                                         tp->tgoal.iu = tp->tgoal.dt =
1149                                                 tp->tgoal.qas = 0;
1150                                         tp->tgoal.period = uc->data;
1151                                         tp->tgoal.offset = np->maxoffs;
1152                                 }
1153                                 tp->tgoal.check_nego = 1;
1154                                 break;
1155                         case UC_SETWIDE:
1156                                 tp->tgoal.width = uc->data ? 1 : 0;
1157                                 tp->tgoal.check_nego = 1;
1158                                 break;
1159                         case UC_SETTAGS:
1160                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
1161                                         sym_tune_dev_queuing(tp, l, uc->data);
1162                                 break;
1163                         case UC_RESETDEV:
1164                                 tp->to_reset = 1;
1165                                 np->istat_sem = SEM;
1166                                 OUTB(np, nc_istat, SIGP|SEM);
1167                                 break;
1168                         case UC_CLEARDEV:
1169                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
1170                                         struct sym_lcb *lp = sym_lp(tp, l);
1171                                         if (lp) lp->to_clear = 1;
1172                                 }
1173                                 np->istat_sem = SEM;
1174                                 OUTB(np, nc_istat, SIGP|SEM);
1175                                 break;
1176                         case UC_SETFLAG:
1177                                 tp->usrflags = uc->data;
1178                                 break;
1179                         }
1180                 }
1181                 break;
1182         }
1183 }
1184
1185 static int skip_spaces(char *ptr, int len)
1186 {
1187         int cnt, c;
1188
1189         for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
1190
1191         return (len - cnt);
1192 }
1193
1194 static int get_int_arg(char *ptr, int len, u_long *pv)
1195 {
1196         char *end;
1197
1198         *pv = simple_strtoul(ptr, &end, 10);
1199         return (end - ptr);
1200 }
1201
1202 static int is_keyword(char *ptr, int len, char *verb)
1203 {
1204         int verb_len = strlen(verb);
1205
1206         if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1207                 return verb_len;
1208         else
1209                 return 0;
1210 }
1211
1212 #define SKIP_SPACES(ptr, len)                                           \
1213         if ((arg_len = skip_spaces(ptr, len)) < 1)                      \
1214                 return -EINVAL;                                         \
1215         ptr += arg_len; len -= arg_len;
1216
1217 #define GET_INT_ARG(ptr, len, v)                                        \
1218         if (!(arg_len = get_int_arg(ptr, len, &(v))))                   \
1219                 return -EINVAL;                                         \
1220         ptr += arg_len; len -= arg_len;
1221
1222
1223 /*
1224  * Parse a control command
1225  */
1226
1227 static int sym_user_command(struct sym_hcb *np, char *buffer, int length)
1228 {
1229         char *ptr       = buffer;
1230         int len         = length;
1231         struct sym_usrcmd cmd, *uc = &cmd;
1232         int             arg_len;
1233         u_long          target;
1234
1235         memset(uc, 0, sizeof(*uc));
1236
1237         if (len > 0 && ptr[len-1] == '\n')
1238                 --len;
1239
1240         if      ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1241                 uc->cmd = UC_SETSYNC;
1242         else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1243                 uc->cmd = UC_SETTAGS;
1244         else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1245                 uc->cmd = UC_SETVERBOSE;
1246         else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1247                 uc->cmd = UC_SETWIDE;
1248 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1249         else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1250                 uc->cmd = UC_SETDEBUG;
1251 #endif
1252         else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1253                 uc->cmd = UC_SETFLAG;
1254         else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1255                 uc->cmd = UC_RESETDEV;
1256         else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1257                 uc->cmd = UC_CLEARDEV;
1258         else
1259                 arg_len = 0;
1260
1261 #ifdef DEBUG_PROC_INFO
1262 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1263 #endif
1264
1265         if (!arg_len)
1266                 return -EINVAL;
1267         ptr += arg_len; len -= arg_len;
1268
1269         switch(uc->cmd) {
1270         case UC_SETSYNC:
1271         case UC_SETTAGS:
1272         case UC_SETWIDE:
1273         case UC_SETFLAG:
1274         case UC_RESETDEV:
1275         case UC_CLEARDEV:
1276                 SKIP_SPACES(ptr, len);
1277                 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1278                         ptr += arg_len; len -= arg_len;
1279                         uc->target = ~0;
1280                 } else {
1281                         GET_INT_ARG(ptr, len, target);
1282                         uc->target = (1<<target);
1283 #ifdef DEBUG_PROC_INFO
1284 printk("sym_user_command: target=%ld\n", target);
1285 #endif
1286                 }
1287                 break;
1288         }
1289
1290         switch(uc->cmd) {
1291         case UC_SETVERBOSE:
1292         case UC_SETSYNC:
1293         case UC_SETTAGS:
1294         case UC_SETWIDE:
1295                 SKIP_SPACES(ptr, len);
1296                 GET_INT_ARG(ptr, len, uc->data);
1297 #ifdef DEBUG_PROC_INFO
1298 printk("sym_user_command: data=%ld\n", uc->data);
1299 #endif
1300                 break;
1301 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1302         case UC_SETDEBUG:
1303                 while (len > 0) {
1304                         SKIP_SPACES(ptr, len);
1305                         if      ((arg_len = is_keyword(ptr, len, "alloc")))
1306                                 uc->data |= DEBUG_ALLOC;
1307                         else if ((arg_len = is_keyword(ptr, len, "phase")))
1308                                 uc->data |= DEBUG_PHASE;
1309                         else if ((arg_len = is_keyword(ptr, len, "queue")))
1310                                 uc->data |= DEBUG_QUEUE;
1311                         else if ((arg_len = is_keyword(ptr, len, "result")))
1312                                 uc->data |= DEBUG_RESULT;
1313                         else if ((arg_len = is_keyword(ptr, len, "scatter")))
1314                                 uc->data |= DEBUG_SCATTER;
1315                         else if ((arg_len = is_keyword(ptr, len, "script")))
1316                                 uc->data |= DEBUG_SCRIPT;
1317                         else if ((arg_len = is_keyword(ptr, len, "tiny")))
1318                                 uc->data |= DEBUG_TINY;
1319                         else if ((arg_len = is_keyword(ptr, len, "timing")))
1320                                 uc->data |= DEBUG_TIMING;
1321                         else if ((arg_len = is_keyword(ptr, len, "nego")))
1322                                 uc->data |= DEBUG_NEGO;
1323                         else if ((arg_len = is_keyword(ptr, len, "tags")))
1324                                 uc->data |= DEBUG_TAGS;
1325                         else if ((arg_len = is_keyword(ptr, len, "pointer")))
1326                                 uc->data |= DEBUG_POINTER;
1327                         else
1328                                 return -EINVAL;
1329                         ptr += arg_len; len -= arg_len;
1330                 }
1331 #ifdef DEBUG_PROC_INFO
1332 printk("sym_user_command: data=%ld\n", uc->data);
1333 #endif
1334                 break;
1335 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1336         case UC_SETFLAG:
1337                 while (len > 0) {
1338                         SKIP_SPACES(ptr, len);
1339                         if      ((arg_len = is_keyword(ptr, len, "no_disc")))
1340                                 uc->data &= ~SYM_DISC_ENABLED;
1341                         else
1342                                 return -EINVAL;
1343                         ptr += arg_len; len -= arg_len;
1344                 }
1345                 break;
1346         default:
1347                 break;
1348         }
1349
1350         if (len)
1351                 return -EINVAL;
1352         else {
1353                 unsigned long flags;
1354
1355                 spin_lock_irqsave(np->s.host->host_lock, flags);
1356                 sym_exec_user_command (np, uc);
1357                 spin_unlock_irqrestore(np->s.host->host_lock, flags);
1358         }
1359         return length;
1360 }
1361
1362 #endif  /* SYM_LINUX_USER_COMMAND_SUPPORT */
1363
1364
1365 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1366 /*
1367  *  Informations through the proc file system.
1368  */
1369 struct info_str {
1370         char *buffer;
1371         int length;
1372         int offset;
1373         int pos;
1374 };
1375
1376 static void copy_mem_info(struct info_str *info, char *data, int len)
1377 {
1378         if (info->pos + len > info->length)
1379                 len = info->length - info->pos;
1380
1381         if (info->pos + len < info->offset) {
1382                 info->pos += len;
1383                 return;
1384         }
1385         if (info->pos < info->offset) {
1386                 data += (info->offset - info->pos);
1387                 len  -= (info->offset - info->pos);
1388         }
1389
1390         if (len > 0) {
1391                 memcpy(info->buffer + info->pos, data, len);
1392                 info->pos += len;
1393         }
1394 }
1395
1396 static int copy_info(struct info_str *info, char *fmt, ...)
1397 {
1398         va_list args;
1399         char buf[81];
1400         int len;
1401
1402         va_start(args, fmt);
1403         len = vsprintf(buf, fmt, args);
1404         va_end(args);
1405
1406         copy_mem_info(info, buf, len);
1407         return len;
1408 }
1409
1410 /*
1411  *  Copy formatted information into the input buffer.
1412  */
1413 static int sym_host_info(struct sym_hcb *np, char *ptr, off_t offset, int len)
1414 {
1415         struct info_str info;
1416
1417         info.buffer     = ptr;
1418         info.length     = len;
1419         info.offset     = offset;
1420         info.pos        = 0;
1421
1422         copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1423                          "revision id 0x%x\n",
1424                          np->s.chip_name, np->device_id, np->revision_id);
1425         copy_info(&info, "At PCI address %s, IRQ " IRQ_FMT "\n",
1426                 pci_name(np->s.device), IRQ_PRM(np->s.irq));
1427         copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1428                          (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1429                          np->maxwide ? "Wide" : "Narrow",
1430                          np->minsync_dt ? ", DT capable" : "");
1431
1432         copy_info(&info, "Max. started commands %d, "
1433                          "max. commands per LUN %d\n",
1434                          SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1435
1436         return info.pos > info.offset? info.pos - info.offset : 0;
1437 }
1438 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1439
1440 /*
1441  *  Entry point of the scsi proc fs of the driver.
1442  *  - func = 0 means read  (returns adapter infos)
1443  *  - func = 1 means write (not yet merget from sym53c8xx)
1444  */
1445 static int sym53c8xx_proc_info(struct Scsi_Host *host, char *buffer,
1446                         char **start, off_t offset, int length, int func)
1447 {
1448         struct sym_hcb *np = sym_get_hcb(host);
1449         int retv;
1450
1451         if (func) {
1452 #ifdef  SYM_LINUX_USER_COMMAND_SUPPORT
1453                 retv = sym_user_command(np, buffer, length);
1454 #else
1455                 retv = -EINVAL;
1456 #endif
1457         } else {
1458                 if (start)
1459                         *start = buffer;
1460 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1461                 retv = sym_host_info(np, buffer, offset, length);
1462 #else
1463                 retv = -EINVAL;
1464 #endif
1465         }
1466
1467         return retv;
1468 }
1469 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1470
1471 /*
1472  *      Free controller resources.
1473  */
1474 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev)
1475 {
1476         /*
1477          *  Free O/S specific resources.
1478          */
1479         if (np->s.irq)
1480                 free_irq(np->s.irq, np);
1481         if (np->s.ioaddr)
1482                 pci_iounmap(pdev, np->s.ioaddr);
1483         if (np->s.ramaddr)
1484                 pci_iounmap(pdev, np->s.ramaddr);
1485         /*
1486          *  Free O/S independent resources.
1487          */
1488         sym_hcb_free(np);
1489
1490         sym_mfree_dma(np, sizeof(*np), "HCB");
1491 }
1492
1493 /*
1494  *  Ask/tell the system about DMA addressing.
1495  */
1496 static int sym_setup_bus_dma_mask(struct sym_hcb *np)
1497 {
1498 #if SYM_CONF_DMA_ADDRESSING_MODE > 0
1499 #if   SYM_CONF_DMA_ADDRESSING_MODE == 1
1500 #define DMA_DAC_MASK    0x000000ffffffffffULL /* 40-bit */
1501 #elif SYM_CONF_DMA_ADDRESSING_MODE == 2
1502 #define DMA_DAC_MASK    DMA_64BIT_MASK
1503 #endif
1504         if ((np->features & FE_DAC) &&
1505                         !pci_set_dma_mask(np->s.device, DMA_DAC_MASK)) {
1506                 np->use_dac = 1;
1507                 return 0;
1508         }
1509 #endif
1510
1511         if (!pci_set_dma_mask(np->s.device, DMA_32BIT_MASK))
1512                 return 0;
1513
1514         printf_warning("%s: No suitable DMA available\n", sym_name(np));
1515         return -1;
1516 }
1517
1518 /*
1519  *  Host attach and initialisations.
1520  *
1521  *  Allocate host data and ncb structure.
1522  *  Remap MMIO region.
1523  *  Do chip initialization.
1524  *  If all is OK, install interrupt handling and
1525  *  start the timer daemon.
1526  */
1527 static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1528                 int unit, struct sym_device *dev)
1529 {
1530         struct host_data *host_data;
1531         struct sym_hcb *np = NULL;
1532         struct Scsi_Host *instance = NULL;
1533         struct pci_dev *pdev = dev->pdev;
1534         unsigned long flags;
1535         struct sym_fw *fw;
1536
1537         printk(KERN_INFO
1538                 "sym%d: <%s> rev 0x%x at pci %s irq " IRQ_FMT "\n",
1539                 unit, dev->chip.name, dev->chip.revision_id,
1540                 pci_name(pdev), IRQ_PRM(pdev->irq));
1541
1542         /*
1543          *  Get the firmware for this chip.
1544          */
1545         fw = sym_find_firmware(&dev->chip);
1546         if (!fw)
1547                 goto attach_failed;
1548
1549         /*
1550          *      Allocate host_data structure
1551          */
1552         instance = scsi_host_alloc(tpnt, sizeof(*host_data));
1553         if (!instance)
1554                 goto attach_failed;
1555         host_data = (struct host_data *) instance->hostdata;
1556
1557         /*
1558          *  Allocate immediately the host control block,
1559          *  since we are only expecting to succeed. :)
1560          *  We keep track in the HCB of all the resources that
1561          *  are to be released on error.
1562          */
1563         np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1564         if (!np)
1565                 goto attach_failed;
1566         np->s.device = pdev;
1567         np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1568         host_data->ncb = np;
1569         np->s.host = instance;
1570
1571         pci_set_drvdata(pdev, np);
1572
1573         /*
1574          *  Copy some useful infos to the HCB.
1575          */
1576         np->hcb_ba      = vtobus(np);
1577         np->verbose     = sym_driver_setup.verbose;
1578         np->s.device    = pdev;
1579         np->s.unit      = unit;
1580         np->device_id   = dev->chip.device_id;
1581         np->revision_id = dev->chip.revision_id;
1582         np->features    = dev->chip.features;
1583         np->clock_divn  = dev->chip.nr_divisor;
1584         np->maxoffs     = dev->chip.offset_max;
1585         np->maxburst    = dev->chip.burst_max;
1586         np->myaddr      = dev->host_id;
1587
1588         /*
1589          *  Edit its name.
1590          */
1591         strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1592         sprintf(np->s.inst_name, "sym%d", np->s.unit);
1593
1594         if (sym_setup_bus_dma_mask(np))
1595                 goto attach_failed;
1596
1597         /*
1598          *  Try to map the controller chip to
1599          *  virtual and physical memory.
1600          */
1601         np->mmio_ba = (u32)dev->mmio_base;
1602         np->s.ioaddr    = dev->s.ioaddr;
1603         np->s.ramaddr   = dev->s.ramaddr;
1604         np->s.io_ws = (np->features & FE_IO256) ? 256 : 128;
1605
1606         /*
1607          *  Map on-chip RAM if present and supported.
1608          */
1609         if (!(np->features & FE_RAM))
1610                 dev->ram_base = 0;
1611         if (dev->ram_base) {
1612                 np->ram_ba = (u32)dev->ram_base;
1613                 np->ram_ws = (np->features & FE_RAM8K) ? 8192 : 4096;
1614         }
1615
1616         if (sym_hcb_attach(instance, fw, dev->nvram))
1617                 goto attach_failed;
1618
1619         /*
1620          *  Install the interrupt handler.
1621          *  If we synchonize the C code with SCRIPTS on interrupt,
1622          *  we do not want to share the INTR line at all.
1623          */
1624         if (request_irq(pdev->irq, sym53c8xx_intr, SA_SHIRQ, NAME53C8XX, np)) {
1625                 printf_err("%s: request irq %d failure\n",
1626                         sym_name(np), pdev->irq);
1627                 goto attach_failed;
1628         }
1629         np->s.irq = pdev->irq;
1630
1631         /*
1632          *  After SCSI devices have been opened, we cannot
1633          *  reset the bus safely, so we do it here.
1634          */
1635         spin_lock_irqsave(instance->host_lock, flags);
1636         if (sym_reset_scsi_bus(np, 0))
1637                 goto reset_failed;
1638
1639         /*
1640          *  Start the SCRIPTS.
1641          */
1642         sym_start_up (np, 1);
1643
1644         /*
1645          *  Start the timer daemon
1646          */
1647         init_timer(&np->s.timer);
1648         np->s.timer.data     = (unsigned long) np;
1649         np->s.timer.function = sym53c8xx_timer;
1650         np->s.lasttime=0;
1651         sym_timer (np);
1652
1653         /*
1654          *  Fill Linux host instance structure
1655          *  and return success.
1656          */
1657         instance->max_channel   = 0;
1658         instance->this_id       = np->myaddr;
1659         instance->max_id        = np->maxwide ? 16 : 8;
1660         instance->max_lun       = SYM_CONF_MAX_LUN;
1661         instance->unique_id     = pci_resource_start(pdev, 0);
1662         instance->cmd_per_lun   = SYM_CONF_MAX_TAG;
1663         instance->can_queue     = (SYM_CONF_MAX_START-2);
1664         instance->sg_tablesize  = SYM_CONF_MAX_SG;
1665         instance->max_cmd_len   = 16;
1666         BUG_ON(sym2_transport_template == NULL);
1667         instance->transportt    = sym2_transport_template;
1668
1669         spin_unlock_irqrestore(instance->host_lock, flags);
1670
1671         return instance;
1672
1673  reset_failed:
1674         printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1675                    "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1676         spin_unlock_irqrestore(instance->host_lock, flags);
1677  attach_failed:
1678         if (!instance)
1679                 return NULL;
1680         printf_info("%s: giving up ...\n", sym_name(np));
1681         if (np)
1682                 sym_free_resources(np, pdev);
1683         scsi_host_put(instance);
1684
1685         return NULL;
1686  }
1687
1688
1689 /*
1690  *    Detect and try to read SYMBIOS and TEKRAM NVRAM.
1691  */
1692 #if SYM_CONF_NVRAM_SUPPORT
1693 static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1694 {
1695         devp->nvram = nvp;
1696         devp->device_id = devp->chip.device_id;
1697         nvp->type = 0;
1698
1699         sym_read_nvram(devp, nvp);
1700 }
1701 #else
1702 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1703 {
1704 }
1705 #endif  /* SYM_CONF_NVRAM_SUPPORT */
1706
1707 static int __devinit sym_check_supported(struct sym_device *device)
1708 {
1709         struct sym_chip *chip;
1710         struct pci_dev *pdev = device->pdev;
1711         u_char revision;
1712         unsigned long io_port = pci_resource_start(pdev, 0);
1713         int i;
1714
1715         /*
1716          *  If user excluded this chip, do not initialize it.
1717          *  I hate this code so much.  Must kill it.
1718          */
1719         if (io_port) {
1720                 for (i = 0 ; i < 8 ; i++) {
1721                         if (sym_driver_setup.excludes[i] == io_port)
1722                                 return -ENODEV;
1723                 }
1724         }
1725
1726         /*
1727          * Check if the chip is supported.  Then copy the chip description
1728          * to our device structure so we can make it match the actual device
1729          * and options.
1730          */
1731         pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
1732         chip = sym_lookup_chip_table(pdev->device, revision);
1733         if (!chip) {
1734                 dev_info(&pdev->dev, "device not supported\n");
1735                 return -ENODEV;
1736         }
1737         memcpy(&device->chip, chip, sizeof(device->chip));
1738         device->chip.revision_id = revision;
1739
1740         return 0;
1741 }
1742
1743 /*
1744  * Ignore Symbios chips controlled by various RAID controllers.
1745  * These controllers set value 0x52414944 at RAM end - 16.
1746  */
1747 static int __devinit sym_check_raid(struct sym_device *device)
1748 {
1749         unsigned int ram_size, ram_val;
1750
1751         if (!device->s.ramaddr)
1752                 return 0;
1753
1754         if (device->chip.features & FE_RAM8K)
1755                 ram_size = 8192;
1756         else
1757                 ram_size = 4096;
1758
1759         ram_val = readl(device->s.ramaddr + ram_size - 16);
1760         if (ram_val != 0x52414944)
1761                 return 0;
1762
1763         dev_info(&device->pdev->dev,
1764                         "not initializing, driven by RAID controller.\n");
1765         return -ENODEV;
1766 }
1767
1768 static int __devinit sym_set_workarounds(struct sym_device *device)
1769 {
1770         struct sym_chip *chip = &device->chip;
1771         struct pci_dev *pdev = device->pdev;
1772         u_short status_reg;
1773
1774         /*
1775          *  (ITEM 12 of a DEL about the 896 I haven't yet).
1776          *  We must ensure the chip will use WRITE AND INVALIDATE.
1777          *  The revision number limit is for now arbitrary.
1778          */
1779         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && chip->revision_id < 0x4) {
1780                 chip->features  |= (FE_WRIE | FE_CLSE);
1781         }
1782
1783         /* If the chip can do Memory Write Invalidate, enable it */
1784         if (chip->features & FE_WRIE) {
1785                 if (pci_set_mwi(pdev))
1786                         return -ENODEV;
1787         }
1788
1789         /*
1790          *  Work around for errant bit in 895A. The 66Mhz
1791          *  capable bit is set erroneously. Clear this bit.
1792          *  (Item 1 DEL 533)
1793          *
1794          *  Make sure Config space and Features agree.
1795          *
1796          *  Recall: writes are not normal to status register -
1797          *  write a 1 to clear and a 0 to leave unchanged.
1798          *  Can only reset bits.
1799          */
1800         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1801         if (chip->features & FE_66MHZ) {
1802                 if (!(status_reg & PCI_STATUS_66MHZ))
1803                         chip->features &= ~FE_66MHZ;
1804         } else {
1805                 if (status_reg & PCI_STATUS_66MHZ) {
1806                         status_reg = PCI_STATUS_66MHZ;
1807                         pci_write_config_word(pdev, PCI_STATUS, status_reg);
1808                         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1809                 }
1810         }
1811
1812         return 0;
1813 }
1814
1815 /*
1816  *  Read and check the PCI configuration for any detected NCR
1817  *  boards and save data for attaching after all boards have
1818  *  been detected.
1819  */
1820 static void __devinit
1821 sym_init_device(struct pci_dev *pdev, struct sym_device *device)
1822 {
1823         int i;
1824
1825         device->host_id = SYM_SETUP_HOST_ID;
1826         device->pdev = pdev;
1827
1828         i = pci_get_base_address(pdev, 1, &device->mmio_base);
1829         pci_get_base_address(pdev, i, &device->ram_base);
1830
1831 #ifndef CONFIG_SCSI_SYM53C8XX_IOMAPPED
1832         if (device->mmio_base)
1833                 device->s.ioaddr = pci_iomap(pdev, 1,
1834                                                 pci_resource_len(pdev, 1));
1835 #endif
1836         if (!device->s.ioaddr)
1837                 device->s.ioaddr = pci_iomap(pdev, 0,
1838                                                 pci_resource_len(pdev, 0));
1839         if (device->ram_base)
1840                 device->s.ramaddr = pci_iomap(pdev, i,
1841                                                 pci_resource_len(pdev, i));
1842 }
1843
1844 /*
1845  * The NCR PQS and PDS cards are constructed as a DEC bridge
1846  * behind which sits a proprietary NCR memory controller and
1847  * either four or two 53c875s as separate devices.  We can tell
1848  * if an 875 is part of a PQS/PDS or not since if it is, it will
1849  * be on the same bus as the memory controller.  In its usual
1850  * mode of operation, the 875s are slaved to the memory
1851  * controller for all transfers.  To operate with the Linux
1852  * driver, the memory controller is disabled and the 875s
1853  * freed to function independently.  The only wrinkle is that
1854  * the preset SCSI ID (which may be zero) must be read in from
1855  * a special configuration space register of the 875.
1856  */
1857 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1858 {
1859         int slot;
1860         u8 tmp;
1861
1862         for (slot = 0; slot < 256; slot++) {
1863                 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1864
1865                 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1866                         pci_dev_put(memc);
1867                         continue;
1868                 }
1869
1870                 /* bit 1: allow individual 875 configuration */
1871                 pci_read_config_byte(memc, 0x44, &tmp);
1872                 if ((tmp & 0x2) == 0) {
1873                         tmp |= 0x2;
1874                         pci_write_config_byte(memc, 0x44, tmp);
1875                 }
1876
1877                 /* bit 2: drive individual 875 interrupts to the bus */
1878                 pci_read_config_byte(memc, 0x45, &tmp);
1879                 if ((tmp & 0x4) == 0) {
1880                         tmp |= 0x4;
1881                         pci_write_config_byte(memc, 0x45, tmp);
1882                 }
1883
1884                 pci_dev_put(memc);
1885                 break;
1886         }
1887
1888         pci_read_config_byte(pdev, 0x84, &tmp);
1889         sym_dev->host_id = tmp;
1890 }
1891
1892 /*
1893  *  Called before unloading the module.
1894  *  Detach the host.
1895  *  We have to free resources and halt the NCR chip.
1896  */
1897 static int sym_detach(struct sym_hcb *np, struct pci_dev *pdev)
1898 {
1899         printk("%s: detaching ...\n", sym_name(np));
1900
1901         del_timer_sync(&np->s.timer);
1902
1903         /*
1904          * Reset NCR chip.
1905          * We should use sym_soft_reset(), but we don't want to do
1906          * so, since we may not be safe if interrupts occur.
1907          */
1908         printk("%s: resetting chip\n", sym_name(np));
1909         OUTB(np, nc_istat, SRST);
1910         INB(np, nc_mbox1);
1911         udelay(10);
1912         OUTB(np, nc_istat, 0);
1913
1914         sym_free_resources(np, pdev);
1915
1916         return 1;
1917 }
1918
1919 /*
1920  * Driver host template.
1921  */
1922 static struct scsi_host_template sym2_template = {
1923         .module                 = THIS_MODULE,
1924         .name                   = "sym53c8xx",
1925         .info                   = sym53c8xx_info,
1926         .queuecommand           = sym53c8xx_queue_command,
1927         .slave_alloc            = sym53c8xx_slave_alloc,
1928         .slave_configure        = sym53c8xx_slave_configure,
1929         .eh_abort_handler       = sym53c8xx_eh_abort_handler,
1930         .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1931         .eh_bus_reset_handler   = sym53c8xx_eh_bus_reset_handler,
1932         .eh_host_reset_handler  = sym53c8xx_eh_host_reset_handler,
1933         .this_id                = 7,
1934         .use_clustering         = DISABLE_CLUSTERING,
1935 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1936         .proc_info              = sym53c8xx_proc_info,
1937         .proc_name              = NAME53C8XX,
1938 #endif
1939 };
1940
1941 static int attach_count;
1942
1943 static int __devinit sym2_probe(struct pci_dev *pdev,
1944                                 const struct pci_device_id *ent)
1945 {
1946         struct sym_device sym_dev;
1947         struct sym_nvram nvram;
1948         struct Scsi_Host *instance;
1949
1950         memset(&sym_dev, 0, sizeof(sym_dev));
1951         memset(&nvram, 0, sizeof(nvram));
1952
1953         if (pci_enable_device(pdev))
1954                 goto leave;
1955
1956         pci_set_master(pdev);
1957
1958         if (pci_request_regions(pdev, NAME53C8XX))
1959                 goto disable;
1960
1961         sym_init_device(pdev, &sym_dev);
1962         if (sym_check_supported(&sym_dev))
1963                 goto free;
1964
1965         if (sym_check_raid(&sym_dev))
1966                 goto leave;     /* Don't disable the device */
1967
1968         if (sym_set_workarounds(&sym_dev))
1969                 goto free;
1970
1971         sym_config_pqs(pdev, &sym_dev);
1972
1973         sym_get_nvram(&sym_dev, &nvram);
1974
1975         instance = sym_attach(&sym2_template, attach_count, &sym_dev);
1976         if (!instance)
1977                 goto free;
1978
1979         if (scsi_add_host(instance, &pdev->dev))
1980                 goto detach;
1981         scsi_scan_host(instance);
1982
1983         attach_count++;
1984
1985         return 0;
1986
1987  detach:
1988         sym_detach(pci_get_drvdata(pdev), pdev);
1989  free:
1990         pci_release_regions(pdev);
1991  disable:
1992         pci_disable_device(pdev);
1993  leave:
1994         return -ENODEV;
1995 }
1996
1997 static void __devexit sym2_remove(struct pci_dev *pdev)
1998 {
1999         struct sym_hcb *np = pci_get_drvdata(pdev);
2000         struct Scsi_Host *host = np->s.host;
2001
2002         scsi_remove_host(host);
2003         scsi_host_put(host);
2004
2005         sym_detach(np, pdev);
2006
2007         pci_release_regions(pdev);
2008         pci_disable_device(pdev);
2009
2010         attach_count--;
2011 }
2012
2013 static void sym2_get_signalling(struct Scsi_Host *shost)
2014 {
2015         struct sym_hcb *np = sym_get_hcb(shost);
2016         enum spi_signal_type type;
2017
2018         switch (np->scsi_mode) {
2019         case SMODE_SE:
2020                 type = SPI_SIGNAL_SE;
2021                 break;
2022         case SMODE_LVD:
2023                 type = SPI_SIGNAL_LVD;
2024                 break;
2025         case SMODE_HVD:
2026                 type = SPI_SIGNAL_HVD;
2027                 break;
2028         default:
2029                 type = SPI_SIGNAL_UNKNOWN;
2030                 break;
2031         }
2032         spi_signalling(shost) = type;
2033 }
2034
2035 static void sym2_set_offset(struct scsi_target *starget, int offset)
2036 {
2037         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2038         struct sym_hcb *np = sym_get_hcb(shost);
2039         struct sym_tcb *tp = &np->target[starget->id];
2040
2041         tp->tgoal.offset = offset;
2042         tp->tgoal.check_nego = 1;
2043 }
2044
2045 static void sym2_set_period(struct scsi_target *starget, int period)
2046 {
2047         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2048         struct sym_hcb *np = sym_get_hcb(shost);
2049         struct sym_tcb *tp = &np->target[starget->id];
2050
2051         /* have to have DT for these transfers, but DT will also
2052          * set width, so check that this is allowed */
2053         if (period <= np->minsync && spi_width(starget))
2054                 tp->tgoal.dt = 1;
2055
2056         tp->tgoal.period = period;
2057         tp->tgoal.check_nego = 1;
2058 }
2059
2060 static void sym2_set_width(struct scsi_target *starget, int width)
2061 {
2062         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2063         struct sym_hcb *np = sym_get_hcb(shost);
2064         struct sym_tcb *tp = &np->target[starget->id];
2065
2066         /* It is illegal to have DT set on narrow transfers.  If DT is
2067          * clear, we must also clear IU and QAS.  */
2068         if (width == 0)
2069                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2070
2071         tp->tgoal.width = width;
2072         tp->tgoal.check_nego = 1;
2073 }
2074
2075 static void sym2_set_dt(struct scsi_target *starget, int dt)
2076 {
2077         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2078         struct sym_hcb *np = sym_get_hcb(shost);
2079         struct sym_tcb *tp = &np->target[starget->id];
2080
2081         /* We must clear QAS and IU if DT is clear */
2082         if (dt)
2083                 tp->tgoal.dt = 1;
2084         else
2085                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2086         tp->tgoal.check_nego = 1;
2087 }
2088
2089 static void sym2_set_iu(struct scsi_target *starget, int iu)
2090 {
2091         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2092         struct sym_hcb *np = sym_get_hcb(shost);
2093         struct sym_tcb *tp = &np->target[starget->id];
2094
2095         if (iu)
2096                 tp->tgoal.iu = tp->tgoal.dt = 1;
2097         else
2098                 tp->tgoal.iu = 0;
2099         tp->tgoal.check_nego = 1;
2100 }
2101
2102 static void sym2_set_qas(struct scsi_target *starget, int qas)
2103 {
2104         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2105         struct sym_hcb *np = sym_get_hcb(shost);
2106         struct sym_tcb *tp = &np->target[starget->id];
2107
2108         if (qas)
2109                 tp->tgoal.dt = tp->tgoal.qas = 1;
2110         else
2111                 tp->tgoal.qas = 0;
2112         tp->tgoal.check_nego = 1;
2113 }
2114
2115
2116 static struct spi_function_template sym2_transport_functions = {
2117         .set_offset     = sym2_set_offset,
2118         .show_offset    = 1,
2119         .set_period     = sym2_set_period,
2120         .show_period    = 1,
2121         .set_width      = sym2_set_width,
2122         .show_width     = 1,
2123         .set_dt         = sym2_set_dt,
2124         .show_dt        = 1,
2125         .set_iu         = sym2_set_iu,
2126         .show_iu        = 1,
2127         .set_qas        = sym2_set_qas,
2128         .show_qas       = 1,
2129         .get_signalling = sym2_get_signalling,
2130 };
2131
2132 static struct pci_device_id sym2_id_table[] __devinitdata = {
2133         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2134           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2135         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2136           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2137         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2138           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2139         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2140           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2141         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2142           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2143         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2144           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2145         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2146           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2147         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2148           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2149         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2150           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2151         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2152           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2153         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2154           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2155         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2156           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2157         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2158           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2159         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2160           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2161         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2162           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2163         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2164           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2165         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2166           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2167         { 0, }
2168 };
2169
2170 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2171
2172 static struct pci_driver sym2_driver = {
2173         .name           = NAME53C8XX,
2174         .id_table       = sym2_id_table,
2175         .probe          = sym2_probe,
2176         .remove         = __devexit_p(sym2_remove),
2177 };
2178
2179 static int __init sym2_init(void)
2180 {
2181         int error;
2182
2183         sym2_setup_params();
2184         sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2185         if (!sym2_transport_template)
2186                 return -ENODEV;
2187
2188         error = pci_register_driver(&sym2_driver);
2189         if (error)
2190                 spi_release_transport(sym2_transport_template);
2191         return error;
2192 }
2193
2194 static void __exit sym2_exit(void)
2195 {
2196         pci_unregister_driver(&sym2_driver);
2197         spi_release_transport(sym2_transport_template);
2198 }
2199
2200 module_init(sym2_init);
2201 module_exit(sym2_exit);