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   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         sym_start_next_ccbs(np, lp, 2);
 567         return 0;
 568
 569 out_abort:
 570         sym_free_ccb(np, cp);
 571         sym_xpt_done(np, cmd);
 572         return 0;
 573 }
 574
 575
 576 /*
 577  *  timer daemon.
 578  *
 579  *  Misused to keep the driver running when
 580  *  interrupts are not configured correctly.
 581  */
 582 static void sym_timer(struct sym_hcb *np)
 583 {
 584         unsigned long thistime = jiffies;
 585
 586         /*
 587          *  Restart the timer.
 588          */
 589         np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
 590         add_timer(&np->s.timer);
 591
 592         /*
 593          *  If we are resetting the ncr, wait for settle_time before
 594          *  clearing it. Then command processing will be resumed.
 595          */
 596         if (np->s.settle_time_valid) {
 597                 if (time_before_eq(np->s.settle_time, thistime)) {
 598                         if (sym_verbose >= 2 )
 599                                 printk("%s: command processing resumed\n",
 600                                        sym_name(np));
 601                         np->s.settle_time_valid = 0;
 602                 }
 603                 return;
 604         }
 605
 606         /*
 607          *      Nothing to do for now, but that may come.
 608          */
 609         if (np->s.lasttime + 4*HZ < thistime) {
 610                 np->s.lasttime = thistime;
 611         }
 612
 613 #ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
 614         /*
 615          *  Some way-broken PCI bridges may lead to
 616          *  completions being lost when the clearing
 617          *  of the INTFLY flag by the CPU occurs
 618          *  concurrently with the chip raising this flag.
 619          *  If this ever happen, lost completions will
 620          * be reaped here.
 621          */
 622         sym_wakeup_done(np);
 623 #endif
 624 }
 625
 626
 627 /*
 628  *  PCI BUS error handler.
 629  */
 630 void sym_log_bus_error(struct sym_hcb *np)
 631 {
 632         u_short pci_sts;
 633         pci_read_config_word(np->s.device, PCI_STATUS, &pci_sts);
 634         if (pci_sts & 0xf900) {
 635                 pci_write_config_word(np->s.device, PCI_STATUS, pci_sts);
 636                 printf("%s: PCI STATUS = 0x%04x\n",
 637                         sym_name(np), pci_sts & 0xf900);
 638         }
 639 }
 640
 641 /*
 642  * queuecommand method.  Entered with the host adapter lock held and
 643  * interrupts disabled.
 644  */
 645 static int sym53c8xx_queue_command(struct scsi_cmnd *cmd,
 646                                         void (*done)(struct scsi_cmnd *))
 647 {
 648         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
 649         struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
 650         int sts = 0;
 651
 652         cmd->scsi_done     = done;
 653         memset(ucp, 0, sizeof(*ucp));
 654
 655         /*
 656          *  Shorten our settle_time if needed for
 657          *  this command not to time out.
 658          */
 659         if (np->s.settle_time_valid && cmd->timeout_per_command) {
 660                 unsigned long tlimit = jiffies + cmd->timeout_per_command;
 661                 tlimit -= SYM_CONF_TIMER_INTERVAL*2;
 662                 if (time_after(np->s.settle_time, tlimit)) {
 663                         np->s.settle_time = tlimit;
 664                 }
 665         }
 666
 667         if (np->s.settle_time_valid)
 668                 return SCSI_MLQUEUE_HOST_BUSY;
 669
 670         sts = sym_queue_command(np, cmd);
 671         if (sts)
 672                 return SCSI_MLQUEUE_HOST_BUSY;
 673         return 0;
 674 }
 675
 676 /*
 677  *  Linux entry point of the interrupt handler.
 678  */
 679 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs)
 680 {
 681         unsigned long flags;
 682         struct sym_hcb *np = (struct sym_hcb *)dev_id;
 683
 684         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
 685
 686         spin_lock_irqsave(np->s.host->host_lock, flags);
 687         sym_interrupt(np);
 688         spin_unlock_irqrestore(np->s.host->host_lock, flags);
 689
 690         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
 691
 692         return IRQ_HANDLED;
 693 }
 694
 695 /*
 696  *  Linux entry point of the timer handler
 697  */
 698 static void sym53c8xx_timer(unsigned long npref)
 699 {
 700         struct sym_hcb *np = (struct sym_hcb *)npref;
 701         unsigned long flags;
 702
 703         spin_lock_irqsave(np->s.host->host_lock, flags);
 704         sym_timer(np);
 705         spin_unlock_irqrestore(np->s.host->host_lock, flags);
 706 }
 707
 708
 709 /*
 710  *  What the eh thread wants us to perform.
 711  */
 712 #define SYM_EH_ABORT            0
 713 #define SYM_EH_DEVICE_RESET     1
 714 #define SYM_EH_BUS_RESET        2
 715 #define SYM_EH_HOST_RESET       3
 716
 717 /*
 718  *  What we will do regarding the involved SCSI command.
 719  */
 720 #define SYM_EH_DO_IGNORE        0
 721 #define SYM_EH_DO_COMPLETE      1
 722 #define SYM_EH_DO_WAIT          2
 723
 724 /*
 725  *  Our general completion handler.
 726  */
 727 static void __sym_eh_done(struct scsi_cmnd *cmd, int timed_out)
 728 {
 729         struct sym_eh_wait *ep = SYM_UCMD_PTR(cmd)->eh_wait;
 730         if (!ep)
 731                 return;
 732
 733         /* Try to avoid a race here (not 100% safe) */
 734         if (!timed_out) {
 735                 ep->timed_out = 0;
 736                 if (ep->to_do == SYM_EH_DO_WAIT && !del_timer(&ep->timer))
 737                         return;
 738         }
 739
 740         /* Revert everything */
 741         SYM_UCMD_PTR(cmd)->eh_wait = NULL;
 742         cmd->scsi_done = ep->old_done;
 743
 744         /* Wake up the eh thread if it wants to sleep */
 745         if (ep->to_do == SYM_EH_DO_WAIT)
 746                 complete(&ep->done);
 747 }
 748
 749 /*
 750  *  scsi_done() alias when error recovery is in progress.
 751  */
 752 static void sym_eh_done(struct scsi_cmnd *cmd) { __sym_eh_done(cmd, 0); }
 753
 754 /*
 755  *  Some timeout handler to avoid waiting too long.
 756  */
 757 static void sym_eh_timeout(u_long p) { __sym_eh_done((struct scsi_cmnd *)p, 1); }
 758
 759 /*
 760  *  Generic method for our eh processing.
 761  *  The 'op' argument tells what we have to do.
 762  */
 763 static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
 764 {
 765         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
 766         SYM_QUEHEAD *qp;
 767         int to_do = SYM_EH_DO_IGNORE;
 768         int sts = -1;
 769         struct sym_eh_wait eh, *ep = &eh;
 770
 771         dev_warn(&cmd->device->sdev_gendev, "%s operation started.\n", opname);
 772
 773         /* This one is queued in some place -> to wait for completion */
 774         FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
 775                 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
 776                 if (cp->cmd == cmd) {
 777                         to_do = SYM_EH_DO_WAIT;
 778                         goto prepare;
 779                 }
 780         }
 781
 782 prepare:
 783         /* Prepare stuff to either ignore, complete or wait for completion */
 784         switch(to_do) {
 785         default:
 786         case SYM_EH_DO_IGNORE:
 787                 break;
 788         case SYM_EH_DO_WAIT:
 789                 init_completion(&ep->done);
 790                 /* fall through */
 791         case SYM_EH_DO_COMPLETE:
 792                 ep->old_done = cmd->scsi_done;
 793                 cmd->scsi_done = sym_eh_done;
 794                 SYM_UCMD_PTR(cmd)->eh_wait = ep;
 795         }
 796
 797         /* Try to proceed the operation we have been asked for */
 798         sts = -1;
 799         switch(op) {
 800         case SYM_EH_ABORT:
 801                 sts = sym_abort_scsiio(np, cmd, 1);
 802                 break;
 803         case SYM_EH_DEVICE_RESET:
 804                 sts = sym_reset_scsi_target(np, cmd->device->id);
 805                 break;
 806         case SYM_EH_BUS_RESET:
 807                 sym_reset_scsi_bus(np, 1);
 808                 sts = 0;
 809                 break;
 810         case SYM_EH_HOST_RESET:
 811                 sym_reset_scsi_bus(np, 0);
 812                 sym_start_up (np, 1);
 813                 sts = 0;
 814                 break;
 815         default:
 816                 break;
 817         }
 818
 819         /* On error, restore everything and cross fingers :) */
 820         if (sts) {
 821                 SYM_UCMD_PTR(cmd)->eh_wait = NULL;
 822                 cmd->scsi_done = ep->old_done;
 823                 to_do = SYM_EH_DO_IGNORE;
 824         }
 825
 826         ep->to_do = to_do;
 827         /* Complete the command with locks held as required by the driver */
 828         if (to_do == SYM_EH_DO_COMPLETE)
 829                 sym_xpt_done2(np, cmd, DID_ABORT);
 830
 831         /* Wait for completion with locks released, as required by kernel */
 832         if (to_do == SYM_EH_DO_WAIT) {
 833                 init_timer(&ep->timer);
 834                 ep->timer.expires = jiffies + (5*HZ);
 835                 ep->timer.function = sym_eh_timeout;
 836                 ep->timer.data = (u_long)cmd;
 837                 ep->timed_out = 1;      /* Be pessimistic for once :) */
 838                 add_timer(&ep->timer);
 839                 spin_unlock_irq(np->s.host->host_lock);
 840                 wait_for_completion(&ep->done);
 841                 spin_lock_irq(np->s.host->host_lock);
 842                 if (ep->timed_out)
 843                         sts = -2;
 844         }
 845         dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
 846                         sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
 847         return sts ? SCSI_FAILED : SCSI_SUCCESS;
 848 }
 849
 850
 851 /*
 852  * Error handlers called from the eh thread (one thread per HBA).
 853  */
 854 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
 855 {
 856         int rc;
 857
 858         spin_lock_irq(cmd->device->host->host_lock);
 859         rc = sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
 860         spin_unlock_irq(cmd->device->host->host_lock);
 861
 862         return rc;
 863 }
 864
 865 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
 866 {
 867         int rc;
 868
 869         spin_lock_irq(cmd->device->host->host_lock);
 870         rc = sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
 871         spin_unlock_irq(cmd->device->host->host_lock);
 872
 873         return rc;
 874 }
 875
 876 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
 877 {
 878         int rc;
 879
 880         spin_lock_irq(cmd->device->host->host_lock);
 881         rc = sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
 882         spin_unlock_irq(cmd->device->host->host_lock);
 883
 884         return rc;
 885 }
 886
 887 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
 888 {
 889         int rc;
 890
 891         spin_lock_irq(cmd->device->host->host_lock);
 892         rc = sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
 893         spin_unlock_irq(cmd->device->host->host_lock);
 894
 895         return rc;
 896 }
 897
 898 /*
 899  *  Tune device queuing depth, according to various limits.
 900  */
 901 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
 902 {
 903         struct sym_lcb *lp = sym_lp(tp, lun);
 904         u_short oldtags;
 905
 906         if (!lp)
 907                 return;
 908
 909         oldtags = lp->s.reqtags;
 910
 911         if (reqtags > lp->s.scdev_depth)
 912                 reqtags = lp->s.scdev_depth;
 913
 914         lp->started_limit = reqtags ? reqtags : 2;
 915         lp->started_max   = 1;
 916         lp->s.reqtags     = reqtags;
 917
 918         if (reqtags != oldtags) {
 919                 dev_info(&tp->starget->dev,
 920                          "tagged command queuing %s, command queue depth %d.\n",
 921                           lp->s.reqtags ? "enabled" : "disabled",
 922                           lp->started_limit);
 923         }
 924 }
 925
 926 /*
 927  *  Linux select queue depths function
 928  */
 929 #define DEF_DEPTH       (sym_driver_setup.max_tag)
 930 #define ALL_TARGETS     -2
 931 #define NO_TARGET       -1
 932 #define ALL_LUNS        -2
 933 #define NO_LUN          -1
 934
 935 static int device_queue_depth(struct sym_hcb *np, int target, int lun)
 936 {
 937         int c, h, t, u, v;
 938         char *p = sym_driver_setup.tag_ctrl;
 939         char *ep;
 940
 941         h = -1;
 942         t = NO_TARGET;
 943         u = NO_LUN;
 944         while ((c = *p++) != 0) {
 945                 v = simple_strtoul(p, &ep, 0);
 946                 switch(c) {
 947                 case '/':
 948                         ++h;
 949                         t = ALL_TARGETS;
 950                         u = ALL_LUNS;
 951                         break;
 952                 case 't':
 953                         if (t != target)
 954                                 t = (target == v) ? v : NO_TARGET;
 955                         u = ALL_LUNS;
 956                         break;
 957                 case 'u':
 958                         if (u != lun)
 959                                 u = (lun == v) ? v : NO_LUN;
 960                         break;
 961                 case 'q':
 962                         if (h == np->s.unit &&
 963                                 (t == ALL_TARGETS || t == target) &&
 964                                 (u == ALL_LUNS    || u == lun))
 965                                 return v;
 966                         break;
 967                 case '-':
 968                         t = ALL_TARGETS;
 969                         u = ALL_LUNS;
 970                         break;
 971                 default:
 972                         break;
 973                 }
 974                 p = ep;
 975         }
 976         return DEF_DEPTH;
 977 }
 978
 979 static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
 980 {
 981         struct sym_hcb *np = sym_get_hcb(sdev->host);
 982         struct sym_tcb *tp = &np->target[sdev->id];
 983         struct sym_lcb *lp;
 984
 985         if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
 986                 return -ENXIO;
 987
 988         /*
 989          * Fail the device init if the device is flagged NOSCAN at BOOT in
 990          * the NVRAM.  This may speed up boot and maintain coherency with
 991          * BIOS device numbering.  Clearing the flag allows the user to
 992          * rescan skipped devices later.  We also return an error for
 993          * devices not flagged for SCAN LUNS in the NVRAM since some single
 994          * lun devices behave badly when asked for a non zero LUN.
 995          */
 996
 997         if ((tp->usrflags & SYM_SCAN_BOOT_DISABLED) ||
 998             ((tp->usrflags & SYM_SCAN_LUNS_DISABLED) && sdev->lun != 0)) {
 999                 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
1000                 return -ENXIO;
1001         }
1002
1003         lp = sym_alloc_lcb(np, sdev->id, sdev->lun);
1004         if (!lp)
1005                 return -ENOMEM;
1006
1007         tp->starget = sdev->sdev_target;
1008         return 0;
1009 }
1010
1011 /*
1012  * Linux entry point for device queue sizing.
1013  */
1014 static int sym53c8xx_slave_configure(struct scsi_device *sdev)
1015 {
1016         struct sym_hcb *np = sym_get_hcb(sdev->host);
1017         struct sym_tcb *tp = &np->target[sdev->id];
1018         struct sym_lcb *lp = sym_lp(tp, sdev->lun);
1019         int reqtags, depth_to_use;
1020
1021         /*
1022          *  Get user flags.
1023          */
1024         lp->curr_flags = lp->user_flags;
1025
1026         /*
1027          *  Select queue depth from driver setup.
1028          *  Donnot use more than configured by user.
1029          *  Use at least 2.
1030          *  Donnot use more than our maximum.
1031          */
1032         reqtags = device_queue_depth(np, sdev->id, sdev->lun);
1033         if (reqtags > tp->usrtags)
1034                 reqtags = tp->usrtags;
1035         if (!sdev->tagged_supported)
1036                 reqtags = 0;
1037 #if 1 /* Avoid to locally queue commands for no good reasons */
1038         if (reqtags > SYM_CONF_MAX_TAG)
1039                 reqtags = SYM_CONF_MAX_TAG;
1040         depth_to_use = (reqtags ? reqtags : 2);
1041 #else
1042         depth_to_use = (reqtags ? SYM_CONF_MAX_TAG : 2);
1043 #endif
1044         scsi_adjust_queue_depth(sdev,
1045                                 (sdev->tagged_supported ?
1046                                  MSG_SIMPLE_TAG : 0),
1047                                 depth_to_use);
1048         lp->s.scdev_depth = depth_to_use;
1049         sym_tune_dev_queuing(tp, sdev->lun, reqtags);
1050
1051         if (!spi_initial_dv(sdev->sdev_target))
1052                 spi_dv_device(sdev);
1053
1054         return 0;
1055 }
1056
1057 static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
1058 {
1059         struct sym_hcb *np = sym_get_hcb(sdev->host);
1060         struct sym_lcb *lp = sym_lp(&np->target[sdev->id], sdev->lun);
1061
1062         if (lp->itlq_tbl)
1063                 sym_mfree_dma(lp->itlq_tbl, SYM_CONF_MAX_TASK * 4, "ITLQ_TBL");
1064         kfree(lp->cb_tags);
1065         sym_mfree_dma(lp, sizeof(*lp), "LCB");
1066 }
1067
1068 /*
1069  *  Linux entry point for info() function
1070  */
1071 static const char *sym53c8xx_info (struct Scsi_Host *host)
1072 {
1073         return SYM_DRIVER_NAME;
1074 }
1075
1076
1077 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1078 /*
1079  *  Proc file system stuff
1080  *
1081  *  A read operation returns adapter information.
1082  *  A write operation is a control command.
1083  *  The string is parsed in the driver code and the command is passed
1084  *  to the sym_usercmd() function.
1085  */
1086
1087 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1088
1089 struct  sym_usrcmd {
1090         u_long  target;
1091         u_long  lun;
1092         u_long  data;
1093         u_long  cmd;
1094 };
1095
1096 #define UC_SETSYNC      10
1097 #define UC_SETTAGS      11
1098 #define UC_SETDEBUG     12
1099 #define UC_SETWIDE      14
1100 #define UC_SETFLAG      15
1101 #define UC_SETVERBOSE   17
1102 #define UC_RESETDEV     18
1103 #define UC_CLEARDEV     19
1104
1105 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
1106 {
1107         struct sym_tcb *tp;
1108         int t, l;
1109
1110         switch (uc->cmd) {
1111         case 0: return;
1112
1113 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1114         case UC_SETDEBUG:
1115                 sym_debug_flags = uc->data;
1116                 break;
1117 #endif
1118         case UC_SETVERBOSE:
1119                 np->verbose = uc->data;
1120                 break;
1121         default:
1122                 /*
1123                  * We assume that other commands apply to targets.
1124                  * This should always be the case and avoid the below
1125                  * 4 lines to be repeated 6 times.
1126                  */
1127                 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
1128                         if (!((uc->target >> t) & 1))
1129                                 continue;
1130                         tp = &np->target[t];
1131
1132                         switch (uc->cmd) {
1133
1134                         case UC_SETSYNC:
1135                                 if (!uc->data || uc->data >= 255) {
1136                                         tp->tgoal.iu = tp->tgoal.dt =
1137                                                 tp->tgoal.qas = 0;
1138                                         tp->tgoal.offset = 0;
1139                                 } else if (uc->data <= 9 && np->minsync_dt) {
1140                                         if (uc->data < np->minsync_dt)
1141                                                 uc->data = np->minsync_dt;
1142                                         tp->tgoal.iu = tp->tgoal.dt =
1143                                                 tp->tgoal.qas = 1;
1144                                         tp->tgoal.width = 1;
1145                                         tp->tgoal.period = uc->data;
1146                                         tp->tgoal.offset = np->maxoffs_dt;
1147                                 } else {
1148                                         if (uc->data < np->minsync)
1149                                                 uc->data = np->minsync;
1150                                         tp->tgoal.iu = tp->tgoal.dt =
1151                                                 tp->tgoal.qas = 0;
1152                                         tp->tgoal.period = uc->data;
1153                                         tp->tgoal.offset = np->maxoffs;
1154                                 }
1155                                 tp->tgoal.check_nego = 1;
1156                                 break;
1157                         case UC_SETWIDE:
1158                                 tp->tgoal.width = uc->data ? 1 : 0;
1159                                 tp->tgoal.check_nego = 1;
1160                                 break;
1161                         case UC_SETTAGS:
1162                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
1163                                         sym_tune_dev_queuing(tp, l, uc->data);
1164                                 break;
1165                         case UC_RESETDEV:
1166                                 tp->to_reset = 1;
1167                                 np->istat_sem = SEM;
1168                                 OUTB(np, nc_istat, SIGP|SEM);
1169                                 break;
1170                         case UC_CLEARDEV:
1171                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
1172                                         struct sym_lcb *lp = sym_lp(tp, l);
1173                                         if (lp) lp->to_clear = 1;
1174                                 }
1175                                 np->istat_sem = SEM;
1176                                 OUTB(np, nc_istat, SIGP|SEM);
1177                                 break;
1178                         case UC_SETFLAG:
1179                                 tp->usrflags = uc->data;
1180                                 break;
1181                         }
1182                 }
1183                 break;
1184         }
1185 }
1186
1187 static int skip_spaces(char *ptr, int len)
1188 {
1189         int cnt, c;
1190
1191         for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
1192
1193         return (len - cnt);
1194 }
1195
1196 static int get_int_arg(char *ptr, int len, u_long *pv)
1197 {
1198         char *end;
1199
1200         *pv = simple_strtoul(ptr, &end, 10);
1201         return (end - ptr);
1202 }
1203
1204 static int is_keyword(char *ptr, int len, char *verb)
1205 {
1206         int verb_len = strlen(verb);
1207
1208         if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1209                 return verb_len;
1210         else
1211                 return 0;
1212 }
1213
1214 #define SKIP_SPACES(ptr, len)                                           \
1215         if ((arg_len = skip_spaces(ptr, len)) < 1)                      \
1216                 return -EINVAL;                                         \
1217         ptr += arg_len; len -= arg_len;
1218
1219 #define GET_INT_ARG(ptr, len, v)                                        \
1220         if (!(arg_len = get_int_arg(ptr, len, &(v))))                   \
1221                 return -EINVAL;                                         \
1222         ptr += arg_len; len -= arg_len;
1223
1224
1225 /*
1226  * Parse a control command
1227  */
1228
1229 static int sym_user_command(struct sym_hcb *np, char *buffer, int length)
1230 {
1231         char *ptr       = buffer;
1232         int len         = length;
1233         struct sym_usrcmd cmd, *uc = &cmd;
1234         int             arg_len;
1235         u_long          target;
1236
1237         memset(uc, 0, sizeof(*uc));
1238
1239         if (len > 0 && ptr[len-1] == '\n')
1240                 --len;
1241
1242         if      ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1243                 uc->cmd = UC_SETSYNC;
1244         else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1245                 uc->cmd = UC_SETTAGS;
1246         else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1247                 uc->cmd = UC_SETVERBOSE;
1248         else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1249                 uc->cmd = UC_SETWIDE;
1250 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1251         else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1252                 uc->cmd = UC_SETDEBUG;
1253 #endif
1254         else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1255                 uc->cmd = UC_SETFLAG;
1256         else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1257                 uc->cmd = UC_RESETDEV;
1258         else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1259                 uc->cmd = UC_CLEARDEV;
1260         else
1261                 arg_len = 0;
1262
1263 #ifdef DEBUG_PROC_INFO
1264 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1265 #endif
1266
1267         if (!arg_len)
1268                 return -EINVAL;
1269         ptr += arg_len; len -= arg_len;
1270
1271         switch(uc->cmd) {
1272         case UC_SETSYNC:
1273         case UC_SETTAGS:
1274         case UC_SETWIDE:
1275         case UC_SETFLAG:
1276         case UC_RESETDEV:
1277         case UC_CLEARDEV:
1278                 SKIP_SPACES(ptr, len);
1279                 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1280                         ptr += arg_len; len -= arg_len;
1281                         uc->target = ~0;
1282                 } else {
1283                         GET_INT_ARG(ptr, len, target);
1284                         uc->target = (1<<target);
1285 #ifdef DEBUG_PROC_INFO
1286 printk("sym_user_command: target=%ld\n", target);
1287 #endif
1288                 }
1289                 break;
1290         }
1291
1292         switch(uc->cmd) {
1293         case UC_SETVERBOSE:
1294         case UC_SETSYNC:
1295         case UC_SETTAGS:
1296         case UC_SETWIDE:
1297                 SKIP_SPACES(ptr, len);
1298                 GET_INT_ARG(ptr, len, uc->data);
1299 #ifdef DEBUG_PROC_INFO
1300 printk("sym_user_command: data=%ld\n", uc->data);
1301 #endif
1302                 break;
1303 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1304         case UC_SETDEBUG:
1305                 while (len > 0) {
1306                         SKIP_SPACES(ptr, len);
1307                         if      ((arg_len = is_keyword(ptr, len, "alloc")))
1308                                 uc->data |= DEBUG_ALLOC;
1309                         else if ((arg_len = is_keyword(ptr, len, "phase")))
1310                                 uc->data |= DEBUG_PHASE;
1311                         else if ((arg_len = is_keyword(ptr, len, "queue")))
1312                                 uc->data |= DEBUG_QUEUE;
1313                         else if ((arg_len = is_keyword(ptr, len, "result")))
1314                                 uc->data |= DEBUG_RESULT;
1315                         else if ((arg_len = is_keyword(ptr, len, "scatter")))
1316                                 uc->data |= DEBUG_SCATTER;
1317                         else if ((arg_len = is_keyword(ptr, len, "script")))
1318                                 uc->data |= DEBUG_SCRIPT;
1319                         else if ((arg_len = is_keyword(ptr, len, "tiny")))
1320                                 uc->data |= DEBUG_TINY;
1321                         else if ((arg_len = is_keyword(ptr, len, "timing")))
1322                                 uc->data |= DEBUG_TIMING;
1323                         else if ((arg_len = is_keyword(ptr, len, "nego")))
1324                                 uc->data |= DEBUG_NEGO;
1325                         else if ((arg_len = is_keyword(ptr, len, "tags")))
1326                                 uc->data |= DEBUG_TAGS;
1327                         else if ((arg_len = is_keyword(ptr, len, "pointer")))
1328                                 uc->data |= DEBUG_POINTER;
1329                         else
1330                                 return -EINVAL;
1331                         ptr += arg_len; len -= arg_len;
1332                 }
1333 #ifdef DEBUG_PROC_INFO
1334 printk("sym_user_command: data=%ld\n", uc->data);
1335 #endif
1336                 break;
1337 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1338         case UC_SETFLAG:
1339                 while (len > 0) {
1340                         SKIP_SPACES(ptr, len);
1341                         if      ((arg_len = is_keyword(ptr, len, "no_disc")))
1342                                 uc->data &= ~SYM_DISC_ENABLED;
1343                         else
1344                                 return -EINVAL;
1345                         ptr += arg_len; len -= arg_len;
1346                 }
1347                 break;
1348         default:
1349                 break;
1350         }
1351
1352         if (len)
1353                 return -EINVAL;
1354         else {
1355                 unsigned long flags;
1356
1357                 spin_lock_irqsave(np->s.host->host_lock, flags);
1358                 sym_exec_user_command (np, uc);
1359                 spin_unlock_irqrestore(np->s.host->host_lock, flags);
1360         }
1361         return length;
1362 }
1363
1364 #endif  /* SYM_LINUX_USER_COMMAND_SUPPORT */
1365
1366
1367 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1368 /*
1369  *  Informations through the proc file system.
1370  */
1371 struct info_str {
1372         char *buffer;
1373         int length;
1374         int offset;
1375         int pos;
1376 };
1377
1378 static void copy_mem_info(struct info_str *info, char *data, int len)
1379 {
1380         if (info->pos + len > info->length)
1381                 len = info->length - info->pos;
1382
1383         if (info->pos + len < info->offset) {
1384                 info->pos += len;
1385                 return;
1386         }
1387         if (info->pos < info->offset) {
1388                 data += (info->offset - info->pos);
1389                 len  -= (info->offset - info->pos);
1390         }
1391
1392         if (len > 0) {
1393                 memcpy(info->buffer + info->pos, data, len);
1394                 info->pos += len;
1395         }
1396 }
1397
1398 static int copy_info(struct info_str *info, char *fmt, ...)
1399 {
1400         va_list args;
1401         char buf[81];
1402         int len;
1403
1404         va_start(args, fmt);
1405         len = vsprintf(buf, fmt, args);
1406         va_end(args);
1407
1408         copy_mem_info(info, buf, len);
1409         return len;
1410 }
1411
1412 /*
1413  *  Copy formatted information into the input buffer.
1414  */
1415 static int sym_host_info(struct sym_hcb *np, char *ptr, off_t offset, int len)
1416 {
1417         struct info_str info;
1418
1419         info.buffer     = ptr;
1420         info.length     = len;
1421         info.offset     = offset;
1422         info.pos        = 0;
1423
1424         copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1425                          "revision id 0x%x\n",
1426                          np->s.chip_name, np->device_id, np->revision_id);
1427         copy_info(&info, "At PCI address %s, IRQ " IRQ_FMT "\n",
1428                 pci_name(np->s.device), IRQ_PRM(np->s.irq));
1429         copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1430                          (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1431                          np->maxwide ? "Wide" : "Narrow",
1432                          np->minsync_dt ? ", DT capable" : "");
1433
1434         copy_info(&info, "Max. started commands %d, "
1435                          "max. commands per LUN %d\n",
1436                          SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1437
1438         return info.pos > info.offset? info.pos - info.offset : 0;
1439 }
1440 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1441
1442 /*
1443  *  Entry point of the scsi proc fs of the driver.
1444  *  - func = 0 means read  (returns adapter infos)
1445  *  - func = 1 means write (not yet merget from sym53c8xx)
1446  */
1447 static int sym53c8xx_proc_info(struct Scsi_Host *host, char *buffer,
1448                         char **start, off_t offset, int length, int func)
1449 {
1450         struct sym_hcb *np = sym_get_hcb(host);
1451         int retv;
1452
1453         if (func) {
1454 #ifdef  SYM_LINUX_USER_COMMAND_SUPPORT
1455                 retv = sym_user_command(np, buffer, length);
1456 #else
1457                 retv = -EINVAL;
1458 #endif
1459         } else {
1460                 if (start)
1461                         *start = buffer;
1462 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1463                 retv = sym_host_info(np, buffer, offset, length);
1464 #else
1465                 retv = -EINVAL;
1466 #endif
1467         }
1468
1469         return retv;
1470 }
1471 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1472
1473 /*
1474  *      Free controller resources.
1475  */
1476 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev)
1477 {
1478         /*
1479          *  Free O/S specific resources.
1480          */
1481         if (np->s.irq)
1482                 free_irq(np->s.irq, np);
1483         if (np->s.ioaddr)
1484                 pci_iounmap(pdev, np->s.ioaddr);
1485         if (np->s.ramaddr)
1486                 pci_iounmap(pdev, np->s.ramaddr);
1487         /*
1488          *  Free O/S independent resources.
1489          */
1490         sym_hcb_free(np);
1491
1492         sym_mfree_dma(np, sizeof(*np), "HCB");
1493 }
1494
1495 /*
1496  *  Ask/tell the system about DMA addressing.
1497  */
1498 static int sym_setup_bus_dma_mask(struct sym_hcb *np)
1499 {
1500 #if SYM_CONF_DMA_ADDRESSING_MODE > 0
1501 #if   SYM_CONF_DMA_ADDRESSING_MODE == 1
1502 #define DMA_DAC_MASK    0x000000ffffffffffULL /* 40-bit */
1503 #elif SYM_CONF_DMA_ADDRESSING_MODE == 2
1504 #define DMA_DAC_MASK    DMA_64BIT_MASK
1505 #endif
1506         if ((np->features & FE_DAC) &&
1507                         !pci_set_dma_mask(np->s.device, DMA_DAC_MASK)) {
1508                 np->use_dac = 1;
1509                 return 0;
1510         }
1511 #endif
1512
1513         if (!pci_set_dma_mask(np->s.device, DMA_32BIT_MASK))
1514                 return 0;
1515
1516         printf_warning("%s: No suitable DMA available\n", sym_name(np));
1517         return -1;
1518 }
1519
1520 /*
1521  *  Host attach and initialisations.
1522  *
1523  *  Allocate host data and ncb structure.
1524  *  Remap MMIO region.
1525  *  Do chip initialization.
1526  *  If all is OK, install interrupt handling and
1527  *  start the timer daemon.
1528  */
1529 static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1530                 int unit, struct sym_device *dev)
1531 {
1532         struct host_data *host_data;
1533         struct sym_hcb *np = NULL;
1534         struct Scsi_Host *instance = NULL;
1535         struct pci_dev *pdev = dev->pdev;
1536         unsigned long flags;
1537         struct sym_fw *fw;
1538
1539         printk(KERN_INFO
1540                 "sym%d: <%s> rev 0x%x at pci %s irq " IRQ_FMT "\n",
1541                 unit, dev->chip.name, dev->chip.revision_id,
1542                 pci_name(pdev), IRQ_PRM(pdev->irq));
1543
1544         /*
1545          *  Get the firmware for this chip.
1546          */
1547         fw = sym_find_firmware(&dev->chip);
1548         if (!fw)
1549                 goto attach_failed;
1550
1551         /*
1552          *      Allocate host_data structure
1553          */
1554         instance = scsi_host_alloc(tpnt, sizeof(*host_data));
1555         if (!instance)
1556                 goto attach_failed;
1557         host_data = (struct host_data *) instance->hostdata;
1558
1559         /*
1560          *  Allocate immediately the host control block,
1561          *  since we are only expecting to succeed. :)
1562          *  We keep track in the HCB of all the resources that
1563          *  are to be released on error.
1564          */
1565         np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1566         if (!np)
1567                 goto attach_failed;
1568         np->s.device = pdev;
1569         np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1570         host_data->ncb = np;
1571         np->s.host = instance;
1572
1573         pci_set_drvdata(pdev, np);
1574
1575         /*
1576          *  Copy some useful infos to the HCB.
1577          */
1578         np->hcb_ba      = vtobus(np);
1579         np->verbose     = sym_driver_setup.verbose;
1580         np->s.device    = pdev;
1581         np->s.unit      = unit;
1582         np->device_id   = dev->chip.device_id;
1583         np->revision_id = dev->chip.revision_id;
1584         np->features    = dev->chip.features;
1585         np->clock_divn  = dev->chip.nr_divisor;
1586         np->maxoffs     = dev->chip.offset_max;
1587         np->maxburst    = dev->chip.burst_max;
1588         np->myaddr      = dev->host_id;
1589
1590         /*
1591          *  Edit its name.
1592          */
1593         strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1594         sprintf(np->s.inst_name, "sym%d", np->s.unit);
1595
1596         if (sym_setup_bus_dma_mask(np))
1597                 goto attach_failed;
1598
1599         /*
1600          *  Try to map the controller chip to
1601          *  virtual and physical memory.
1602          */
1603         np->mmio_ba = (u32)dev->mmio_base;
1604         np->s.ioaddr    = dev->s.ioaddr;
1605         np->s.ramaddr   = dev->s.ramaddr;
1606         np->s.io_ws = (np->features & FE_IO256) ? 256 : 128;
1607
1608         /*
1609          *  Map on-chip RAM if present and supported.
1610          */
1611         if (!(np->features & FE_RAM))
1612                 dev->ram_base = 0;
1613         if (dev->ram_base) {
1614                 np->ram_ba = (u32)dev->ram_base;
1615                 np->ram_ws = (np->features & FE_RAM8K) ? 8192 : 4096;
1616         }
1617
1618         if (sym_hcb_attach(instance, fw, dev->nvram))
1619                 goto attach_failed;
1620
1621         /*
1622          *  Install the interrupt handler.
1623          *  If we synchonize the C code with SCRIPTS on interrupt,
1624          *  we do not want to share the INTR line at all.
1625          */
1626         if (request_irq(pdev->irq, sym53c8xx_intr, SA_SHIRQ, NAME53C8XX, np)) {
1627                 printf_err("%s: request irq %d failure\n",
1628                         sym_name(np), pdev->irq);
1629                 goto attach_failed;
1630         }
1631         np->s.irq = pdev->irq;
1632
1633         /*
1634          *  After SCSI devices have been opened, we cannot
1635          *  reset the bus safely, so we do it here.
1636          */
1637         spin_lock_irqsave(instance->host_lock, flags);
1638         if (sym_reset_scsi_bus(np, 0))
1639                 goto reset_failed;
1640
1641         /*
1642          *  Start the SCRIPTS.
1643          */
1644         sym_start_up (np, 1);
1645
1646         /*
1647          *  Start the timer daemon
1648          */
1649         init_timer(&np->s.timer);
1650         np->s.timer.data     = (unsigned long) np;
1651         np->s.timer.function = sym53c8xx_timer;
1652         np->s.lasttime=0;
1653         sym_timer (np);
1654
1655         /*
1656          *  Fill Linux host instance structure
1657          *  and return success.
1658          */
1659         instance->max_channel   = 0;
1660         instance->this_id       = np->myaddr;
1661         instance->max_id        = np->maxwide ? 16 : 8;
1662         instance->max_lun       = SYM_CONF_MAX_LUN;
1663         instance->unique_id     = pci_resource_start(pdev, 0);
1664         instance->cmd_per_lun   = SYM_CONF_MAX_TAG;
1665         instance->can_queue     = (SYM_CONF_MAX_START-2);
1666         instance->sg_tablesize  = SYM_CONF_MAX_SG;
1667         instance->max_cmd_len   = 16;
1668         BUG_ON(sym2_transport_template == NULL);
1669         instance->transportt    = sym2_transport_template;
1670
1671         spin_unlock_irqrestore(instance->host_lock, flags);
1672
1673         return instance;
1674
1675  reset_failed:
1676         printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1677                    "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1678         spin_unlock_irqrestore(instance->host_lock, flags);
1679  attach_failed:
1680         if (!instance)
1681                 return NULL;
1682         printf_info("%s: giving up ...\n", sym_name(np));
1683         if (np)
1684                 sym_free_resources(np, pdev);
1685         scsi_host_put(instance);
1686
1687         return NULL;
1688  }
1689
1690
1691 /*
1692  *    Detect and try to read SYMBIOS and TEKRAM NVRAM.
1693  */
1694 #if SYM_CONF_NVRAM_SUPPORT
1695 static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1696 {
1697         devp->nvram = nvp;
1698         devp->device_id = devp->chip.device_id;
1699         nvp->type = 0;
1700
1701         sym_read_nvram(devp, nvp);
1702 }
1703 #else
1704 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1705 {
1706 }
1707 #endif  /* SYM_CONF_NVRAM_SUPPORT */
1708
1709 static int __devinit sym_check_supported(struct sym_device *device)
1710 {
1711         struct sym_chip *chip;
1712         struct pci_dev *pdev = device->pdev;
1713         u_char revision;
1714         unsigned long io_port = pci_resource_start(pdev, 0);
1715         int i;
1716
1717         /*
1718          *  If user excluded this chip, do not initialize it.
1719          *  I hate this code so much.  Must kill it.
1720          */
1721         if (io_port) {
1722                 for (i = 0 ; i < 8 ; i++) {
1723                         if (sym_driver_setup.excludes[i] == io_port)
1724                                 return -ENODEV;
1725                 }
1726         }
1727
1728         /*
1729          * Check if the chip is supported.  Then copy the chip description
1730          * to our device structure so we can make it match the actual device
1731          * and options.
1732          */
1733         pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
1734         chip = sym_lookup_chip_table(pdev->device, revision);
1735         if (!chip) {
1736                 dev_info(&pdev->dev, "device not supported\n");
1737                 return -ENODEV;
1738         }
1739         memcpy(&device->chip, chip, sizeof(device->chip));
1740         device->chip.revision_id = revision;
1741
1742         return 0;
1743 }
1744
1745 /*
1746  * Ignore Symbios chips controlled by various RAID controllers.
1747  * These controllers set value 0x52414944 at RAM end - 16.
1748  */
1749 static int __devinit sym_check_raid(struct sym_device *device)
1750 {
1751         unsigned int ram_size, ram_val;
1752
1753         if (!device->s.ramaddr)
1754                 return 0;
1755
1756         if (device->chip.features & FE_RAM8K)
1757                 ram_size = 8192;
1758         else
1759                 ram_size = 4096;
1760
1761         ram_val = readl(device->s.ramaddr + ram_size - 16);
1762         if (ram_val != 0x52414944)
1763                 return 0;
1764
1765         dev_info(&device->pdev->dev,
1766                         "not initializing, driven by RAID controller.\n");
1767         return -ENODEV;
1768 }
1769
1770 static int __devinit sym_set_workarounds(struct sym_device *device)
1771 {
1772         struct sym_chip *chip = &device->chip;
1773         struct pci_dev *pdev = device->pdev;
1774         u_short status_reg;
1775
1776         /*
1777          *  (ITEM 12 of a DEL about the 896 I haven't yet).
1778          *  We must ensure the chip will use WRITE AND INVALIDATE.
1779          *  The revision number limit is for now arbitrary.
1780          */
1781         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && chip->revision_id < 0x4) {
1782                 chip->features  |= (FE_WRIE | FE_CLSE);
1783         }
1784
1785         /* If the chip can do Memory Write Invalidate, enable it */
1786         if (chip->features & FE_WRIE) {
1787                 if (pci_set_mwi(pdev))
1788                         return -ENODEV;
1789         }
1790
1791         /*
1792          *  Work around for errant bit in 895A. The 66Mhz
1793          *  capable bit is set erroneously. Clear this bit.
1794          *  (Item 1 DEL 533)
1795          *
1796          *  Make sure Config space and Features agree.
1797          *
1798          *  Recall: writes are not normal to status register -
1799          *  write a 1 to clear and a 0 to leave unchanged.
1800          *  Can only reset bits.
1801          */
1802         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1803         if (chip->features & FE_66MHZ) {
1804                 if (!(status_reg & PCI_STATUS_66MHZ))
1805                         chip->features &= ~FE_66MHZ;
1806         } else {
1807                 if (status_reg & PCI_STATUS_66MHZ) {
1808                         status_reg = PCI_STATUS_66MHZ;
1809                         pci_write_config_word(pdev, PCI_STATUS, status_reg);
1810                         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1811                 }
1812         }
1813
1814         return 0;
1815 }
1816
1817 /*
1818  *  Read and check the PCI configuration for any detected NCR
1819  *  boards and save data for attaching after all boards have
1820  *  been detected.
1821  */
1822 static void __devinit
1823 sym_init_device(struct pci_dev *pdev, struct sym_device *device)
1824 {
1825         int i;
1826
1827         device->host_id = SYM_SETUP_HOST_ID;
1828         device->pdev = pdev;
1829
1830         i = pci_get_base_address(pdev, 1, &device->mmio_base);
1831         pci_get_base_address(pdev, i, &device->ram_base);
1832
1833 #ifndef CONFIG_SCSI_SYM53C8XX_IOMAPPED
1834         if (device->mmio_base)
1835                 device->s.ioaddr = pci_iomap(pdev, 1,
1836                                                 pci_resource_len(pdev, 1));
1837 #endif
1838         if (!device->s.ioaddr)
1839                 device->s.ioaddr = pci_iomap(pdev, 0,
1840                                                 pci_resource_len(pdev, 0));
1841         if (device->ram_base)
1842                 device->s.ramaddr = pci_iomap(pdev, i,
1843                                                 pci_resource_len(pdev, i));
1844 }
1845
1846 /*
1847  * The NCR PQS and PDS cards are constructed as a DEC bridge
1848  * behind which sits a proprietary NCR memory controller and
1849  * either four or two 53c875s as separate devices.  We can tell
1850  * if an 875 is part of a PQS/PDS or not since if it is, it will
1851  * be on the same bus as the memory controller.  In its usual
1852  * mode of operation, the 875s are slaved to the memory
1853  * controller for all transfers.  To operate with the Linux
1854  * driver, the memory controller is disabled and the 875s
1855  * freed to function independently.  The only wrinkle is that
1856  * the preset SCSI ID (which may be zero) must be read in from
1857  * a special configuration space register of the 875.
1858  */
1859 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1860 {
1861         int slot;
1862         u8 tmp;
1863
1864         for (slot = 0; slot < 256; slot++) {
1865                 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1866
1867                 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1868                         pci_dev_put(memc);
1869                         continue;
1870                 }
1871
1872                 /* bit 1: allow individual 875 configuration */
1873                 pci_read_config_byte(memc, 0x44, &tmp);
1874                 if ((tmp & 0x2) == 0) {
1875                         tmp |= 0x2;
1876                         pci_write_config_byte(memc, 0x44, tmp);
1877                 }
1878
1879                 /* bit 2: drive individual 875 interrupts to the bus */
1880                 pci_read_config_byte(memc, 0x45, &tmp);
1881                 if ((tmp & 0x4) == 0) {
1882                         tmp |= 0x4;
1883                         pci_write_config_byte(memc, 0x45, tmp);
1884                 }
1885
1886                 pci_dev_put(memc);
1887                 break;
1888         }
1889
1890         pci_read_config_byte(pdev, 0x84, &tmp);
1891         sym_dev->host_id = tmp;
1892 }
1893
1894 /*
1895  *  Called before unloading the module.
1896  *  Detach the host.
1897  *  We have to free resources and halt the NCR chip.
1898  */
1899 static int sym_detach(struct sym_hcb *np, struct pci_dev *pdev)
1900 {
1901         printk("%s: detaching ...\n", sym_name(np));
1902
1903         del_timer_sync(&np->s.timer);
1904
1905         /*
1906          * Reset NCR chip.
1907          * We should use sym_soft_reset(), but we don't want to do
1908          * so, since we may not be safe if interrupts occur.
1909          */
1910         printk("%s: resetting chip\n", sym_name(np));
1911         OUTB(np, nc_istat, SRST);
1912         INB(np, nc_mbox1);
1913         udelay(10);
1914         OUTB(np, nc_istat, 0);
1915
1916         sym_free_resources(np, pdev);
1917
1918         return 1;
1919 }
1920
1921 /*
1922  * Driver host template.
1923  */
1924 static struct scsi_host_template sym2_template = {
1925         .module                 = THIS_MODULE,
1926         .name                   = "sym53c8xx",
1927         .info                   = sym53c8xx_info,
1928         .queuecommand           = sym53c8xx_queue_command,
1929         .slave_alloc            = sym53c8xx_slave_alloc,
1930         .slave_configure        = sym53c8xx_slave_configure,
1931         .slave_destroy          = sym53c8xx_slave_destroy,
1932         .eh_abort_handler       = sym53c8xx_eh_abort_handler,
1933         .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1934         .eh_bus_reset_handler   = sym53c8xx_eh_bus_reset_handler,
1935         .eh_host_reset_handler  = sym53c8xx_eh_host_reset_handler,
1936         .this_id                = 7,
1937         .use_clustering         = DISABLE_CLUSTERING,
1938 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1939         .proc_info              = sym53c8xx_proc_info,
1940         .proc_name              = NAME53C8XX,
1941 #endif
1942 };
1943
1944 static int attach_count;
1945
1946 static int __devinit sym2_probe(struct pci_dev *pdev,
1947                                 const struct pci_device_id *ent)
1948 {
1949         struct sym_device sym_dev;
1950         struct sym_nvram nvram;
1951         struct Scsi_Host *instance;
1952
1953         memset(&sym_dev, 0, sizeof(sym_dev));
1954         memset(&nvram, 0, sizeof(nvram));
1955
1956         if (pci_enable_device(pdev))
1957                 goto leave;
1958
1959         pci_set_master(pdev);
1960
1961         if (pci_request_regions(pdev, NAME53C8XX))
1962                 goto disable;
1963
1964         sym_init_device(pdev, &sym_dev);
1965         if (sym_check_supported(&sym_dev))
1966                 goto free;
1967
1968         if (sym_check_raid(&sym_dev))
1969                 goto leave;     /* Don't disable the device */
1970
1971         if (sym_set_workarounds(&sym_dev))
1972                 goto free;
1973
1974         sym_config_pqs(pdev, &sym_dev);
1975
1976         sym_get_nvram(&sym_dev, &nvram);
1977
1978         instance = sym_attach(&sym2_template, attach_count, &sym_dev);
1979         if (!instance)
1980                 goto free;
1981
1982         if (scsi_add_host(instance, &pdev->dev))
1983                 goto detach;
1984         scsi_scan_host(instance);
1985
1986         attach_count++;
1987
1988         return 0;
1989
1990  detach:
1991         sym_detach(pci_get_drvdata(pdev), pdev);
1992  free:
1993         pci_release_regions(pdev);
1994  disable:
1995         pci_disable_device(pdev);
1996  leave:
1997         return -ENODEV;
1998 }
1999
2000 static void __devexit sym2_remove(struct pci_dev *pdev)
2001 {
2002         struct sym_hcb *np = pci_get_drvdata(pdev);
2003         struct Scsi_Host *host = np->s.host;
2004
2005         scsi_remove_host(host);
2006         scsi_host_put(host);
2007
2008         sym_detach(np, pdev);
2009
2010         pci_release_regions(pdev);
2011         pci_disable_device(pdev);
2012
2013         attach_count--;
2014 }
2015
2016 static void sym2_get_signalling(struct Scsi_Host *shost)
2017 {
2018         struct sym_hcb *np = sym_get_hcb(shost);
2019         enum spi_signal_type type;
2020
2021         switch (np->scsi_mode) {
2022         case SMODE_SE:
2023                 type = SPI_SIGNAL_SE;
2024                 break;
2025         case SMODE_LVD:
2026                 type = SPI_SIGNAL_LVD;
2027                 break;
2028         case SMODE_HVD:
2029                 type = SPI_SIGNAL_HVD;
2030                 break;
2031         default:
2032                 type = SPI_SIGNAL_UNKNOWN;
2033                 break;
2034         }
2035         spi_signalling(shost) = type;
2036 }
2037
2038 static void sym2_set_offset(struct scsi_target *starget, int offset)
2039 {
2040         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2041         struct sym_hcb *np = sym_get_hcb(shost);
2042         struct sym_tcb *tp = &np->target[starget->id];
2043
2044         tp->tgoal.offset = offset;
2045         tp->tgoal.check_nego = 1;
2046 }
2047
2048 static void sym2_set_period(struct scsi_target *starget, int period)
2049 {
2050         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2051         struct sym_hcb *np = sym_get_hcb(shost);
2052         struct sym_tcb *tp = &np->target[starget->id];
2053
2054         /* have to have DT for these transfers, but DT will also
2055          * set width, so check that this is allowed */
2056         if (period <= np->minsync && spi_width(starget))
2057                 tp->tgoal.dt = 1;
2058
2059         tp->tgoal.period = period;
2060         tp->tgoal.check_nego = 1;
2061 }
2062
2063 static void sym2_set_width(struct scsi_target *starget, int width)
2064 {
2065         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2066         struct sym_hcb *np = sym_get_hcb(shost);
2067         struct sym_tcb *tp = &np->target[starget->id];
2068
2069         /* It is illegal to have DT set on narrow transfers.  If DT is
2070          * clear, we must also clear IU and QAS.  */
2071         if (width == 0)
2072                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2073
2074         tp->tgoal.width = width;
2075         tp->tgoal.check_nego = 1;
2076 }
2077
2078 static void sym2_set_dt(struct scsi_target *starget, int dt)
2079 {
2080         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2081         struct sym_hcb *np = sym_get_hcb(shost);
2082         struct sym_tcb *tp = &np->target[starget->id];
2083
2084         /* We must clear QAS and IU if DT is clear */
2085         if (dt)
2086                 tp->tgoal.dt = 1;
2087         else
2088                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2089         tp->tgoal.check_nego = 1;
2090 }
2091
2092 #if 0
2093 static void sym2_set_iu(struct scsi_target *starget, int iu)
2094 {
2095         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2096         struct sym_hcb *np = sym_get_hcb(shost);
2097         struct sym_tcb *tp = &np->target[starget->id];
2098
2099         if (iu)
2100                 tp->tgoal.iu = tp->tgoal.dt = 1;
2101         else
2102                 tp->tgoal.iu = 0;
2103         tp->tgoal.check_nego = 1;
2104 }
2105
2106 static void sym2_set_qas(struct scsi_target *starget, int qas)
2107 {
2108         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2109         struct sym_hcb *np = sym_get_hcb(shost);
2110         struct sym_tcb *tp = &np->target[starget->id];
2111
2112         if (qas)
2113                 tp->tgoal.dt = tp->tgoal.qas = 1;
2114         else
2115                 tp->tgoal.qas = 0;
2116         tp->tgoal.check_nego = 1;
2117 }
2118 #endif
2119
2120 static struct spi_function_template sym2_transport_functions = {
2121         .set_offset     = sym2_set_offset,
2122         .show_offset    = 1,
2123         .set_period     = sym2_set_period,
2124         .show_period    = 1,
2125         .set_width      = sym2_set_width,
2126         .show_width     = 1,
2127         .set_dt         = sym2_set_dt,
2128         .show_dt        = 1,
2129 #if 0
2130         .set_iu         = sym2_set_iu,
2131         .show_iu        = 1,
2132         .set_qas        = sym2_set_qas,
2133         .show_qas       = 1,
2134 #endif
2135         .get_signalling = sym2_get_signalling,
2136 };
2137
2138 static struct pci_device_id sym2_id_table[] __devinitdata = {
2139         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2140           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2141         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2142           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2143         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2144           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2145         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2146           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2147         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2148           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2149         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2150           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2151         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2152           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2153         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2154           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2155         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2156           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2157         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2158           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2159         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2160           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2161         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2162           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2163         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2164           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2165         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2166           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2167         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2168           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2169         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2170           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2171         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2172           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2173         { 0, }
2174 };
2175
2176 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2177
2178 static struct pci_driver sym2_driver = {
2179         .name           = NAME53C8XX,
2180         .id_table       = sym2_id_table,
2181         .probe          = sym2_probe,
2182         .remove         = __devexit_p(sym2_remove),
2183 };
2184
2185 static int __init sym2_init(void)
2186 {
2187         int error;
2188
2189         sym2_setup_params();
2190         sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2191         if (!sym2_transport_template)
2192                 return -ENODEV;
2193
2194         error = pci_register_driver(&sym2_driver);
2195         if (error)
2196                 spi_release_transport(sym2_transport_template);
2197         return error;
2198 }
2199
2200 static void __exit sym2_exit(void)
2201 {
2202         pci_unregister_driver(&sym2_driver);
2203         spi_release_transport(sym2_transport_template);
2204 }
2205
2206 module_init(sym2_init);
2207 module_exit(sym2_exit);