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