git.oblomov.eu Git - linux-2.6/blob - drivers/scsi/sym53c8xx_2/sym_glue.c

   1 /*
   2  * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
   3  * of PCI-SCSI IO processors.
   4  *
   5  * Copyright (C) 1999-2001  Gerard Roudier <groudier@free.fr>
   6  * Copyright (c) 2003-2005  Matthew Wilcox <matthew@wil.cx>
   7  *
   8  * This driver is derived from the Linux sym53c8xx driver.
   9  * Copyright (C) 1998-2000  Gerard Roudier
  10  *
  11  * The sym53c8xx driver is derived from the ncr53c8xx driver that had been
  12  * a port of the FreeBSD ncr driver to Linux-1.2.13.
  13  *
  14  * The original ncr driver has been written for 386bsd and FreeBSD by
  15  *         Wolfgang Stanglmeier        <wolf@cologne.de>
  16  *         Stefan Esser                <se@mi.Uni-Koeln.de>
  17  * Copyright (C) 1994  Wolfgang Stanglmeier
  18  *
  19  * Other major contributions:
  20  *
  21  * NVRAM detection and reading.
  22  * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
  23  *
  24  *-----------------------------------------------------------------------------
  25  *
  26  * This program is free software; you can redistribute it and/or modify
  27  * it under the terms of the GNU General Public License as published by
  28  * the Free Software Foundation; either version 2 of the License, or
  29  * (at your option) any later version.
  30  *
  31  * This program is distributed in the hope that it will be useful,
  32  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  33  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  34  * GNU General Public License for more details.
  35  *
  36  * You should have received a copy of the GNU General Public License
  37  * along with this program; if not, write to the Free Software
  38  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  39  */
  40 #include <linux/ctype.h>
  41 #include <linux/init.h>
  42 #include <linux/interrupt.h>
  43 #include <linux/module.h>
  44 #include <linux/moduleparam.h>
  45 #include <linux/spinlock.h>
  46 #include <scsi/scsi.h>
  47 #include <scsi/scsi_tcq.h>
  48 #include <scsi/scsi_device.h>
  49 #include <scsi/scsi_transport.h>
  50
  51 #include "sym_glue.h"
  52 #include "sym_nvram.h"
  53
  54 #define NAME53C         "sym53c"
  55 #define NAME53C8XX      "sym53c8xx"
  56
  57 /* 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 static struct scsi_transport_template *sym2_transport_template = NULL;
 138
 139 /*
 140  *  Driver private area in the SCSI command structure.
 141  */
 142 struct sym_ucmd {               /* Override the SCSI pointer structure */
 143         dma_addr_t      data_mapping;
 144         unsigned char   data_mapped;
 145         unsigned char   to_do;                  /* For error handling */
 146         void (*old_done)(struct scsi_cmnd *);   /* For error handling */
 147         struct completion *eh_done;             /* For error handling */
 148 };
 149
 150 #define SYM_UCMD_PTR(cmd)  ((struct sym_ucmd *)(&(cmd)->SCp))
 151 #define SYM_SOFTC_PTR(cmd) sym_get_hcb(cmd->device->host)
 152
 153 static void __unmap_scsi_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
 154 {
 155         int dma_dir = cmd->sc_data_direction;
 156
 157         switch(SYM_UCMD_PTR(cmd)->data_mapped) {
 158         case 2:
 159                 pci_unmap_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
 160                 break;
 161         case 1:
 162                 pci_unmap_single(pdev, SYM_UCMD_PTR(cmd)->data_mapping,
 163                                  cmd->request_bufflen, dma_dir);
 164                 break;
 165         }
 166         SYM_UCMD_PTR(cmd)->data_mapped = 0;
 167 }
 168
 169 static dma_addr_t __map_scsi_single_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
 170 {
 171         dma_addr_t mapping;
 172         int dma_dir = cmd->sc_data_direction;
 173
 174         mapping = pci_map_single(pdev, cmd->request_buffer,
 175                                  cmd->request_bufflen, dma_dir);
 176         if (mapping) {
 177                 SYM_UCMD_PTR(cmd)->data_mapped  = 1;
 178                 SYM_UCMD_PTR(cmd)->data_mapping = mapping;
 179         }
 180
 181         return mapping;
 182 }
 183
 184 static int __map_scsi_sg_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
 185 {
 186         int use_sg;
 187         int dma_dir = cmd->sc_data_direction;
 188
 189         use_sg = pci_map_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
 190         if (use_sg > 0) {
 191                 SYM_UCMD_PTR(cmd)->data_mapped  = 2;
 192                 SYM_UCMD_PTR(cmd)->data_mapping = use_sg;
 193         }
 194
 195         return use_sg;
 196 }
 197
 198 #define unmap_scsi_data(np, cmd)        \
 199                 __unmap_scsi_data(np->s.device, cmd)
 200 #define map_scsi_single_data(np, cmd)   \
 201                 __map_scsi_single_data(np->s.device, cmd)
 202 #define map_scsi_sg_data(np, cmd)       \
 203                 __map_scsi_sg_data(np->s.device, cmd)
 204 /*
 205  *  Complete a pending CAM CCB.
 206  */
 207 void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *cmd)
 208 {
 209         unmap_scsi_data(np, cmd);
 210         cmd->scsi_done(cmd);
 211 }
 212
 213 static void sym_xpt_done2(struct sym_hcb *np, struct scsi_cmnd *cmd, int cam_status)
 214 {
 215         sym_set_cam_status(cmd, cam_status);
 216         sym_xpt_done(np, cmd);
 217 }
 218
 219
 220 /*
 221  *  Tell the SCSI layer about a BUS RESET.
 222  */
 223 void sym_xpt_async_bus_reset(struct sym_hcb *np)
 224 {
 225         printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
 226         np->s.settle_time = jiffies + sym_driver_setup.settle_delay * HZ;
 227         np->s.settle_time_valid = 1;
 228         if (sym_verbose >= 2)
 229                 printf_info("%s: command processing suspended for %d seconds\n",
 230                             sym_name(np), sym_driver_setup.settle_delay);
 231 }
 232
 233 /*
 234  *  Tell the SCSI layer about a BUS DEVICE RESET message sent.
 235  */
 236 void sym_xpt_async_sent_bdr(struct sym_hcb *np, int target)
 237 {
 238         printf_notice("%s: TARGET %d has been reset.\n", sym_name(np), target);
 239 }
 240
 241 /*
 242  *  Choose the more appropriate CAM status if
 243  *  the IO encountered an extended error.
 244  */
 245 static int sym_xerr_cam_status(int cam_status, int x_status)
 246 {
 247         if (x_status) {
 248                 if      (x_status & XE_PARITY_ERR)
 249                         cam_status = DID_PARITY;
 250                 else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN))
 251                         cam_status = DID_ERROR;
 252                 else if (x_status & XE_BAD_PHASE)
 253                         cam_status = DID_ERROR;
 254                 else
 255                         cam_status = DID_ERROR;
 256         }
 257         return cam_status;
 258 }
 259
 260 /*
 261  *  Build CAM result for a failed or auto-sensed IO.
 262  */
 263 void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid)
 264 {
 265         struct scsi_cmnd *cmd = cp->cmd;
 266         u_int cam_status, scsi_status, drv_status;
 267
 268         drv_status  = 0;
 269         cam_status  = DID_OK;
 270         scsi_status = cp->ssss_status;
 271
 272         if (cp->host_flags & HF_SENSE) {
 273                 scsi_status = cp->sv_scsi_status;
 274                 resid = cp->sv_resid;
 275                 if (sym_verbose && cp->sv_xerr_status)
 276                         sym_print_xerr(cmd, cp->sv_xerr_status);
 277                 if (cp->host_status == HS_COMPLETE &&
 278                     cp->ssss_status == S_GOOD &&
 279                     cp->xerr_status == 0) {
 280                         cam_status = sym_xerr_cam_status(DID_OK,
 281                                                          cp->sv_xerr_status);
 282                         drv_status = DRIVER_SENSE;
 283                         /*
 284                          *  Bounce back the sense data to user.
 285                          */
 286                         memset(&cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
 287                         memcpy(cmd->sense_buffer, cp->sns_bbuf,
 288                               min(sizeof(cmd->sense_buffer),
 289                                   (size_t)SYM_SNS_BBUF_LEN));
 290 #if 0
 291                         /*
 292                          *  If the device reports a UNIT ATTENTION condition
 293                          *  due to a RESET condition, we should consider all
 294                          *  disconnect CCBs for this unit as aborted.
 295                          */
 296                         if (1) {
 297                                 u_char *p;
 298                                 p  = (u_char *) cmd->sense_data;
 299                                 if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
 300                                         sym_clear_tasks(np, DID_ABORT,
 301                                                         cp->target,cp->lun, -1);
 302                         }
 303 #endif
 304                 } else {
 305                         /*
 306                          * Error return from our internal request sense.  This
 307                          * is bad: we must clear the contingent allegiance
 308                          * condition otherwise the device will always return
 309                          * BUSY.  Use a big stick.
 310                          */
 311                         sym_reset_scsi_target(np, cmd->device->id);
 312                         cam_status = DID_ERROR;
 313                 }
 314         } else if (cp->host_status == HS_COMPLETE)      /* Bad SCSI status */
 315                 cam_status = DID_OK;
 316         else if (cp->host_status == HS_SEL_TIMEOUT)     /* Selection timeout */
 317                 cam_status = DID_NO_CONNECT;
 318         else if (cp->host_status == HS_UNEXPECTED)      /* Unexpected BUS FREE*/
 319                 cam_status = DID_ERROR;
 320         else {                                          /* Extended error */
 321                 if (sym_verbose) {
 322                         sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
 323                                 cp->host_status, cp->ssss_status,
 324                                 cp->xerr_status);
 325                 }
 326                 /*
 327                  *  Set the most appropriate value for CAM status.
 328                  */
 329                 cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
 330         }
 331         cmd->resid = resid;
 332         cmd->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
 333 }
 334
 335
 336 /*
 337  *  Build the scatter/gather array for an I/O.
 338  */
 339
 340 static int sym_scatter_no_sglist(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
 341 {
 342         struct sym_tblmove *data = &cp->phys.data[SYM_CONF_MAX_SG-1];
 343         int segment;
 344         unsigned int len = cmd->request_bufflen;
 345
 346         if (len) {
 347                 dma_addr_t baddr = map_scsi_single_data(np, cmd);
 348                 if (baddr) {
 349                         if (len & 1) {
 350                                 struct sym_tcb *tp = &np->target[cp->target];
 351                                 if (tp->head.wval & EWS) {
 352                                         len++;
 353                                         cp->odd_byte_adjustment++;
 354                                 }
 355                         }
 356                         cp->data_len = len;
 357                         sym_build_sge(np, data, baddr, len);
 358                         segment = 1;
 359                 } else {
 360                         segment = -2;
 361                 }
 362         } else {
 363                 segment = 0;
 364         }
 365
 366         return segment;
 367 }
 368
 369 static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
 370 {
 371         int segment;
 372         int use_sg = (int) cmd->use_sg;
 373
 374         cp->data_len = 0;
 375
 376         if (!use_sg)
 377                 segment = sym_scatter_no_sglist(np, cp, cmd);
 378         else if ((use_sg = map_scsi_sg_data(np, cmd)) > 0) {
 379                 struct scatterlist *scatter = (struct scatterlist *)cmd->buffer;
 380                 struct sym_tcb *tp = &np->target[cp->target];
 381                 struct sym_tblmove *data;
 382
 383                 if (use_sg > SYM_CONF_MAX_SG) {
 384                         unmap_scsi_data(np, cmd);
 385                         return -1;
 386                 }
 387
 388                 data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
 389
 390                 for (segment = 0; segment < use_sg; segment++) {
 391                         dma_addr_t baddr = sg_dma_address(&scatter[segment]);
 392                         unsigned int len = sg_dma_len(&scatter[segment]);
 393
 394                         if ((len & 1) && (tp->head.wval & EWS)) {
 395                                 len++;
 396                                 cp->odd_byte_adjustment++;
 397                         }
 398
 399                         sym_build_sge(np, &data[segment], baddr, len);
 400                         cp->data_len += len;
 401                 }
 402         } else {
 403                 segment = -2;
 404         }
 405
 406         return segment;
 407 }
 408
 409 /*
 410  *  Queue a SCSI command.
 411  */
 412 static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd)
 413 {
 414         struct scsi_device *sdev = cmd->device;
 415         struct sym_tcb *tp;
 416         struct sym_lcb *lp;
 417         struct sym_ccb *cp;
 418         int     order;
 419
 420         /*
 421          *  Minimal checkings, so that we will not
 422          *  go outside our tables.
 423          */
 424         if (sdev->id == np->myaddr) {
 425                 sym_xpt_done2(np, cmd, DID_NO_CONNECT);
 426                 return 0;
 427         }
 428
 429         /*
 430          *  Retrieve the target descriptor.
 431          */
 432         tp = &np->target[sdev->id];
 433
 434         /*
 435          *  Select tagged/untagged.
 436          */
 437         lp = sym_lp(tp, sdev->lun);
 438         order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
 439
 440         /*
 441          *  Queue the SCSI IO.
 442          */
 443         cp = sym_get_ccb(np, cmd, order);
 444         if (!cp)
 445                 return 1;       /* Means resource shortage */
 446         sym_queue_scsiio(np, cmd, cp);
 447         return 0;
 448 }
 449
 450 /*
 451  *  Setup buffers and pointers that address the CDB.
 452  */
 453 static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
 454 {
 455         memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len);
 456
 457         cp->phys.cmd.addr = CCB_BA(cp, cdb_buf[0]);
 458         cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
 459
 460         return 0;
 461 }
 462
 463 /*
 464  *  Setup pointers that address the data and start the I/O.
 465  */
 466 int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
 467 {
 468         u32 lastp, goalp;
 469         int dir;
 470
 471         /*
 472          *  Build the CDB.
 473          */
 474         if (sym_setup_cdb(np, cmd, cp))
 475                 goto out_abort;
 476
 477         /*
 478          *  No direction means no data.
 479          */
 480         dir = cmd->sc_data_direction;
 481         if (dir != DMA_NONE) {
 482                 cp->segments = sym_scatter(np, cp, cmd);
 483                 if (cp->segments < 0) {
 484                         sym_set_cam_status(cmd, DID_ERROR);
 485                         goto out_abort;
 486                 }
 487
 488                 /*
 489                  *  No segments means no data.
 490                  */
 491                 if (!cp->segments)
 492                         dir = DMA_NONE;
 493         } else {
 494                 cp->data_len = 0;
 495                 cp->segments = 0;
 496         }
 497
 498         /*
 499          *  Set the data pointer.
 500          */
 501         switch (dir) {
 502         case DMA_BIDIRECTIONAL:
 503                 printk("%s: got DMA_BIDIRECTIONAL command", sym_name(np));
 504                 sym_set_cam_status(cmd, DID_ERROR);
 505                 goto out_abort;
 506         case DMA_TO_DEVICE:
 507                 goalp = SCRIPTA_BA(np, data_out2) + 8;
 508                 lastp = goalp - 8 - (cp->segments * (2*4));
 509                 break;
 510         case DMA_FROM_DEVICE:
 511                 cp->host_flags |= HF_DATA_IN;
 512                 goalp = SCRIPTA_BA(np, data_in2) + 8;
 513                 lastp = goalp - 8 - (cp->segments * (2*4));
 514                 break;
 515         case DMA_NONE:
 516         default:
 517                 lastp = goalp = SCRIPTB_BA(np, no_data);
 518                 break;
 519         }
 520
 521         /*
 522          *  Set all pointers values needed by SCRIPTS.
 523          */
 524         cp->phys.head.lastp = cpu_to_scr(lastp);
 525         cp->phys.head.savep = cpu_to_scr(lastp);
 526         cp->startp          = cp->phys.head.savep;
 527         cp->goalp           = cpu_to_scr(goalp);
 528
 529         /*
 530          *  When `#ifed 1', the code below makes the driver
 531          *  panic on the first attempt to write to a SCSI device.
 532          *  It is the first test we want to do after a driver
 533          *  change that does not seem obviously safe. :)
 534          */
 535 #if 0
 536         switch (cp->cdb_buf[0]) {
 537         case 0x0A: case 0x2A: case 0xAA:
 538                 panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
 539                 break;
 540         default:
 541                 break;
 542         }
 543 #endif
 544
 545         /*
 546          *      activate this job.
 547          */
 548         sym_put_start_queue(np, cp);
 549         return 0;
 550
 551 out_abort:
 552         sym_free_ccb(np, cp);
 553         sym_xpt_done(np, cmd);
 554         return 0;
 555 }
 556
 557
 558 /*
 559  *  timer daemon.
 560  *
 561  *  Misused to keep the driver running when
 562  *  interrupts are not configured correctly.
 563  */
 564 static void sym_timer(struct sym_hcb *np)
 565 {
 566         unsigned long thistime = jiffies;
 567
 568         /*
 569          *  Restart the timer.
 570          */
 571         np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
 572         add_timer(&np->s.timer);
 573
 574         /*
 575          *  If we are resetting the ncr, wait for settle_time before
 576          *  clearing it. Then command processing will be resumed.
 577          */
 578         if (np->s.settle_time_valid) {
 579                 if (time_before_eq(np->s.settle_time, thistime)) {
 580                         if (sym_verbose >= 2 )
 581                                 printk("%s: command processing resumed\n",
 582                                        sym_name(np));
 583                         np->s.settle_time_valid = 0;
 584                 }
 585                 return;
 586         }
 587
 588         /*
 589          *      Nothing to do for now, but that may come.
 590          */
 591         if (np->s.lasttime + 4*HZ < thistime) {
 592                 np->s.lasttime = thistime;
 593         }
 594
 595 #ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
 596         /*
 597          *  Some way-broken PCI bridges may lead to
 598          *  completions being lost when the clearing
 599          *  of the INTFLY flag by the CPU occurs
 600          *  concurrently with the chip raising this flag.
 601          *  If this ever happen, lost completions will
 602          * be reaped here.
 603          */
 604         sym_wakeup_done(np);
 605 #endif
 606 }
 607
 608
 609 /*
 610  *  PCI BUS error handler.
 611  */
 612 void sym_log_bus_error(struct sym_hcb *np)
 613 {
 614         u_short pci_sts;
 615         pci_read_config_word(np->s.device, PCI_STATUS, &pci_sts);
 616         if (pci_sts & 0xf900) {
 617                 pci_write_config_word(np->s.device, PCI_STATUS, pci_sts);
 618                 printf("%s: PCI STATUS = 0x%04x\n",
 619                         sym_name(np), pci_sts & 0xf900);
 620         }
 621 }
 622
 623 /*
 624  * queuecommand method.  Entered with the host adapter lock held and
 625  * interrupts disabled.
 626  */
 627 static int sym53c8xx_queue_command(struct scsi_cmnd *cmd,
 628                                         void (*done)(struct scsi_cmnd *))
 629 {
 630         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
 631         struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
 632         int sts = 0;
 633
 634         cmd->scsi_done     = done;
 635         memset(ucp, 0, sizeof(*ucp));
 636
 637         /*
 638          *  Shorten our settle_time if needed for
 639          *  this command not to time out.
 640          */
 641         if (np->s.settle_time_valid && cmd->timeout_per_command) {
 642                 unsigned long tlimit = jiffies + cmd->timeout_per_command;
 643                 tlimit -= SYM_CONF_TIMER_INTERVAL*2;
 644                 if (time_after(np->s.settle_time, tlimit)) {
 645                         np->s.settle_time = tlimit;
 646                 }
 647         }
 648
 649         if (np->s.settle_time_valid)
 650                 return SCSI_MLQUEUE_HOST_BUSY;
 651
 652         sts = sym_queue_command(np, cmd);
 653         if (sts)
 654                 return SCSI_MLQUEUE_HOST_BUSY;
 655         return 0;
 656 }
 657
 658 /*
 659  *  Linux entry point of the interrupt handler.
 660  */
 661 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs)
 662 {
 663         unsigned long flags;
 664         struct sym_hcb *np = (struct sym_hcb *)dev_id;
 665
 666         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
 667
 668         spin_lock_irqsave(np->s.host->host_lock, flags);
 669         sym_interrupt(np);
 670         spin_unlock_irqrestore(np->s.host->host_lock, flags);
 671
 672         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
 673
 674         return IRQ_HANDLED;
 675 }
 676
 677 /*
 678  *  Linux entry point of the timer handler
 679  */
 680 static void sym53c8xx_timer(unsigned long npref)
 681 {
 682         struct sym_hcb *np = (struct sym_hcb *)npref;
 683         unsigned long flags;
 684
 685         spin_lock_irqsave(np->s.host->host_lock, flags);
 686         sym_timer(np);
 687         spin_unlock_irqrestore(np->s.host->host_lock, flags);
 688 }
 689
 690
 691 /*
 692  *  What the eh thread wants us to perform.
 693  */
 694 #define SYM_EH_ABORT            0
 695 #define SYM_EH_DEVICE_RESET     1
 696 #define SYM_EH_BUS_RESET        2
 697 #define SYM_EH_HOST_RESET       3
 698
 699 /*
 700  *  What we will do regarding the involved SCSI command.
 701  */
 702 #define SYM_EH_DO_IGNORE        0
 703 #define SYM_EH_DO_WAIT          2
 704
 705 /*
 706  *  scsi_done() alias when error recovery is in progress.
 707  */
 708 static void sym_eh_done(struct scsi_cmnd *cmd)
 709 {
 710         struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
 711         BUILD_BUG_ON(sizeof(struct scsi_pointer) < sizeof(struct sym_ucmd));
 712
 713         cmd->scsi_done = ucmd->old_done;
 714
 715         if (ucmd->to_do == SYM_EH_DO_WAIT)
 716                 complete(ucmd->eh_done);
 717 }
 718
 719 /*
 720  *  Generic method for our eh processing.
 721  *  The 'op' argument tells what we have to do.
 722  */
 723 static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
 724 {
 725         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
 726         struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
 727         struct Scsi_Host *host = cmd->device->host;
 728         SYM_QUEHEAD *qp;
 729         int to_do = SYM_EH_DO_IGNORE;
 730         int sts = -1;
 731         struct completion eh_done;
 732
 733         dev_warn(&cmd->device->sdev_gendev, "%s operation started.\n", opname);
 734
 735         spin_lock_irq(host->host_lock);
 736         /* This one is queued in some place -> to wait for completion */
 737         FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
 738                 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
 739                 if (cp->cmd == cmd) {
 740                         to_do = SYM_EH_DO_WAIT;
 741                         break;
 742                 }
 743         }
 744
 745         if (to_do == SYM_EH_DO_WAIT) {
 746                 init_completion(&eh_done);
 747                 ucmd->old_done = cmd->scsi_done;
 748                 ucmd->eh_done = &eh_done;
 749                 wmb();
 750                 cmd->scsi_done = sym_eh_done;
 751         }
 752
 753         /* Try to proceed the operation we have been asked for */
 754         sts = -1;
 755         switch(op) {
 756         case SYM_EH_ABORT:
 757                 sts = sym_abort_scsiio(np, cmd, 1);
 758                 break;
 759         case SYM_EH_DEVICE_RESET:
 760                 sts = sym_reset_scsi_target(np, cmd->device->id);
 761                 break;
 762         case SYM_EH_BUS_RESET:
 763                 sym_reset_scsi_bus(np, 1);
 764                 sts = 0;
 765                 break;
 766         case SYM_EH_HOST_RESET:
 767                 sym_reset_scsi_bus(np, 0);
 768                 sym_start_up (np, 1);
 769                 sts = 0;
 770                 break;
 771         default:
 772                 break;
 773         }
 774
 775         /* On error, restore everything and cross fingers :) */
 776         if (sts) {
 777                 cmd->scsi_done = ucmd->old_done;
 778                 to_do = SYM_EH_DO_IGNORE;
 779         }
 780
 781         ucmd->to_do = to_do;
 782         spin_unlock_irq(host->host_lock);
 783
 784         if (to_do == SYM_EH_DO_WAIT) {
 785                 if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
 786                         ucmd->to_do = SYM_EH_DO_IGNORE;
 787                         wmb();
 788                         sts = -2;
 789                 }
 790         }
 791         dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
 792                         sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
 793         return sts ? SCSI_FAILED : SCSI_SUCCESS;
 794 }
 795
 796
 797 /*
 798  * Error handlers called from the eh thread (one thread per HBA).
 799  */
 800 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
 801 {
 802         return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
 803 }
 804
 805 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
 806 {
 807         return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
 808 }
 809
 810 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
 811 {
 812         return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
 813 }
 814
 815 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
 816 {
 817         return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
 818 }
 819
 820 /*
 821  *  Tune device queuing depth, according to various limits.
 822  */
 823 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
 824 {
 825         struct sym_lcb *lp = sym_lp(tp, lun);
 826         u_short oldtags;
 827
 828         if (!lp)
 829                 return;
 830
 831         oldtags = lp->s.reqtags;
 832
 833         if (reqtags > lp->s.scdev_depth)
 834                 reqtags = lp->s.scdev_depth;
 835
 836         lp->s.reqtags     = reqtags;
 837
 838         if (reqtags != oldtags) {
 839                 dev_info(&tp->starget->dev,
 840                          "tagged command queuing %s, command queue depth %d.\n",
 841                           lp->s.reqtags ? "enabled" : "disabled", reqtags);
 842         }
 843 }
 844
 845 /*
 846  *  Linux select queue depths function
 847  */
 848 #define DEF_DEPTH       (sym_driver_setup.max_tag)
 849 #define ALL_TARGETS     -2
 850 #define NO_TARGET       -1
 851 #define ALL_LUNS        -2
 852 #define NO_LUN          -1
 853
 854 static int device_queue_depth(struct sym_hcb *np, int target, int lun)
 855 {
 856         int c, h, t, u, v;
 857         char *p = sym_driver_setup.tag_ctrl;
 858         char *ep;
 859
 860         h = -1;
 861         t = NO_TARGET;
 862         u = NO_LUN;
 863         while ((c = *p++) != 0) {
 864                 v = simple_strtoul(p, &ep, 0);
 865                 switch(c) {
 866                 case '/':
 867                         ++h;
 868                         t = ALL_TARGETS;
 869                         u = ALL_LUNS;
 870                         break;
 871                 case 't':
 872                         if (t != target)
 873                                 t = (target == v) ? v : NO_TARGET;
 874                         u = ALL_LUNS;
 875                         break;
 876                 case 'u':
 877                         if (u != lun)
 878                                 u = (lun == v) ? v : NO_LUN;
 879                         break;
 880                 case 'q':
 881                         if (h == np->s.unit &&
 882                                 (t == ALL_TARGETS || t == target) &&
 883                                 (u == ALL_LUNS    || u == lun))
 884                                 return v;
 885                         break;
 886                 case '-':
 887                         t = ALL_TARGETS;
 888                         u = ALL_LUNS;
 889                         break;
 890                 default:
 891                         break;
 892                 }
 893                 p = ep;
 894         }
 895         return DEF_DEPTH;
 896 }
 897
 898 static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
 899 {
 900         struct sym_hcb *np = sym_get_hcb(sdev->host);
 901         struct sym_tcb *tp = &np->target[sdev->id];
 902         struct sym_lcb *lp;
 903
 904         if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
 905                 return -ENXIO;
 906
 907         tp->starget = sdev->sdev_target;
 908         /*
 909          * Fail the device init if the device is flagged NOSCAN at BOOT in
 910          * the NVRAM.  This may speed up boot and maintain coherency with
 911          * BIOS device numbering.  Clearing the flag allows the user to
 912          * rescan skipped devices later.  We also return an error for
 913          * devices not flagged for SCAN LUNS in the NVRAM since some single
 914          * lun devices behave badly when asked for a non zero LUN.
 915          */
 916
 917         if (tp->usrflags & SYM_SCAN_BOOT_DISABLED) {
 918                 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
 919                 starget_printk(KERN_INFO, tp->starget,
 920                                 "Scan at boot disabled in NVRAM\n");
 921                 return -ENXIO;
 922         }
 923
 924         if (tp->usrflags & SYM_SCAN_LUNS_DISABLED) {
 925                 if (sdev->lun != 0)
 926                         return -ENXIO;
 927                 starget_printk(KERN_INFO, tp->starget,
 928                                 "Multiple LUNs disabled in NVRAM\n");
 929         }
 930
 931         lp = sym_alloc_lcb(np, sdev->id, sdev->lun);
 932         if (!lp)
 933                 return -ENOMEM;
 934
 935         spi_min_period(tp->starget) = tp->usr_period;
 936         spi_max_width(tp->starget) = tp->usr_width;
 937
 938         return 0;
 939 }
 940
 941 /*
 942  * Linux entry point for device queue sizing.
 943  */
 944 static int sym53c8xx_slave_configure(struct scsi_device *sdev)
 945 {
 946         struct sym_hcb *np = sym_get_hcb(sdev->host);
 947         struct sym_tcb *tp = &np->target[sdev->id];
 948         struct sym_lcb *lp = sym_lp(tp, sdev->lun);
 949         int reqtags, depth_to_use;
 950
 951         /*
 952          *  Get user flags.
 953          */
 954         lp->curr_flags = lp->user_flags;
 955
 956         /*
 957          *  Select queue depth from driver setup.
 958          *  Donnot use more than configured by user.
 959          *  Use at least 2.
 960          *  Donnot use more than our maximum.
 961          */
 962         reqtags = device_queue_depth(np, sdev->id, sdev->lun);
 963         if (reqtags > tp->usrtags)
 964                 reqtags = tp->usrtags;
 965         if (!sdev->tagged_supported)
 966                 reqtags = 0;
 967 #if 1 /* Avoid to locally queue commands for no good reasons */
 968         if (reqtags > SYM_CONF_MAX_TAG)
 969                 reqtags = SYM_CONF_MAX_TAG;
 970         depth_to_use = (reqtags ? reqtags : 2);
 971 #else
 972         depth_to_use = (reqtags ? SYM_CONF_MAX_TAG : 2);
 973 #endif
 974         scsi_adjust_queue_depth(sdev,
 975                                 (sdev->tagged_supported ?
 976                                  MSG_SIMPLE_TAG : 0),
 977                                 depth_to_use);
 978         lp->s.scdev_depth = depth_to_use;
 979         sym_tune_dev_queuing(tp, sdev->lun, reqtags);
 980
 981         if (!spi_initial_dv(sdev->sdev_target))
 982                 spi_dv_device(sdev);
 983
 984         return 0;
 985 }
 986
 987 static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
 988 {
 989         struct sym_hcb *np = sym_get_hcb(sdev->host);
 990         struct sym_lcb *lp = sym_lp(&np->target[sdev->id], sdev->lun);
 991
 992         if (lp->itlq_tbl)
 993                 sym_mfree_dma(lp->itlq_tbl, SYM_CONF_MAX_TASK * 4, "ITLQ_TBL");
 994         kfree(lp->cb_tags);
 995         sym_mfree_dma(lp, sizeof(*lp), "LCB");
 996 }
 997
 998 /*
 999  *  Linux entry point for info() function
1000  */
1001 static const char *sym53c8xx_info (struct Scsi_Host *host)
1002 {
1003         return SYM_DRIVER_NAME;
1004 }
1005
1006
1007 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1008 /*
1009  *  Proc file system stuff
1010  *
1011  *  A read operation returns adapter information.
1012  *  A write operation is a control command.
1013  *  The string is parsed in the driver code and the command is passed
1014  *  to the sym_usercmd() function.
1015  */
1016
1017 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1018
1019 struct  sym_usrcmd {
1020         u_long  target;
1021         u_long  lun;
1022         u_long  data;
1023         u_long  cmd;
1024 };
1025
1026 #define UC_SETSYNC      10
1027 #define UC_SETTAGS      11
1028 #define UC_SETDEBUG     12
1029 #define UC_SETWIDE      14
1030 #define UC_SETFLAG      15
1031 #define UC_SETVERBOSE   17
1032 #define UC_RESETDEV     18
1033 #define UC_CLEARDEV     19
1034
1035 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
1036 {
1037         struct sym_tcb *tp;
1038         int t, l;
1039
1040         switch (uc->cmd) {
1041         case 0: return;
1042
1043 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1044         case UC_SETDEBUG:
1045                 sym_debug_flags = uc->data;
1046                 break;
1047 #endif
1048         case UC_SETVERBOSE:
1049                 np->verbose = uc->data;
1050                 break;
1051         default:
1052                 /*
1053                  * We assume that other commands apply to targets.
1054                  * This should always be the case and avoid the below
1055                  * 4 lines to be repeated 6 times.
1056                  */
1057                 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
1058                         if (!((uc->target >> t) & 1))
1059                                 continue;
1060                         tp = &np->target[t];
1061
1062                         switch (uc->cmd) {
1063
1064                         case UC_SETSYNC:
1065                                 if (!uc->data || uc->data >= 255) {
1066                                         tp->tgoal.iu = tp->tgoal.dt =
1067                                                 tp->tgoal.qas = 0;
1068                                         tp->tgoal.offset = 0;
1069                                 } else if (uc->data <= 9 && np->minsync_dt) {
1070                                         if (uc->data < np->minsync_dt)
1071                                                 uc->data = np->minsync_dt;
1072                                         tp->tgoal.iu = tp->tgoal.dt =
1073                                                 tp->tgoal.qas = 1;
1074                                         tp->tgoal.width = 1;
1075                                         tp->tgoal.period = uc->data;
1076                                         tp->tgoal.offset = np->maxoffs_dt;
1077                                 } else {
1078                                         if (uc->data < np->minsync)
1079                                                 uc->data = np->minsync;
1080                                         tp->tgoal.iu = tp->tgoal.dt =
1081                                                 tp->tgoal.qas = 0;
1082                                         tp->tgoal.period = uc->data;
1083                                         tp->tgoal.offset = np->maxoffs;
1084                                 }
1085                                 tp->tgoal.check_nego = 1;
1086                                 break;
1087                         case UC_SETWIDE:
1088                                 tp->tgoal.width = uc->data ? 1 : 0;
1089                                 tp->tgoal.check_nego = 1;
1090                                 break;
1091                         case UC_SETTAGS:
1092                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
1093                                         sym_tune_dev_queuing(tp, l, uc->data);
1094                                 break;
1095                         case UC_RESETDEV:
1096                                 tp->to_reset = 1;
1097                                 np->istat_sem = SEM;
1098                                 OUTB(np, nc_istat, SIGP|SEM);
1099                                 break;
1100                         case UC_CLEARDEV:
1101                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
1102                                         struct sym_lcb *lp = sym_lp(tp, l);
1103                                         if (lp) lp->to_clear = 1;
1104                                 }
1105                                 np->istat_sem = SEM;
1106                                 OUTB(np, nc_istat, SIGP|SEM);
1107                                 break;
1108                         case UC_SETFLAG:
1109                                 tp->usrflags = uc->data;
1110                                 break;
1111                         }
1112                 }
1113                 break;
1114         }
1115 }
1116
1117 static int skip_spaces(char *ptr, int len)
1118 {
1119         int cnt, c;
1120
1121         for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
1122
1123         return (len - cnt);
1124 }
1125
1126 static int get_int_arg(char *ptr, int len, u_long *pv)
1127 {
1128         char *end;
1129
1130         *pv = simple_strtoul(ptr, &end, 10);
1131         return (end - ptr);
1132 }
1133
1134 static int is_keyword(char *ptr, int len, char *verb)
1135 {
1136         int verb_len = strlen(verb);
1137
1138         if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1139                 return verb_len;
1140         else
1141                 return 0;
1142 }
1143
1144 #define SKIP_SPACES(ptr, len)                                           \
1145         if ((arg_len = skip_spaces(ptr, len)) < 1)                      \
1146                 return -EINVAL;                                         \
1147         ptr += arg_len; len -= arg_len;
1148
1149 #define GET_INT_ARG(ptr, len, v)                                        \
1150         if (!(arg_len = get_int_arg(ptr, len, &(v))))                   \
1151                 return -EINVAL;                                         \
1152         ptr += arg_len; len -= arg_len;
1153
1154
1155 /*
1156  * Parse a control command
1157  */
1158
1159 static int sym_user_command(struct sym_hcb *np, char *buffer, int length)
1160 {
1161         char *ptr       = buffer;
1162         int len         = length;
1163         struct sym_usrcmd cmd, *uc = &cmd;
1164         int             arg_len;
1165         u_long          target;
1166
1167         memset(uc, 0, sizeof(*uc));
1168
1169         if (len > 0 && ptr[len-1] == '\n')
1170                 --len;
1171
1172         if      ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1173                 uc->cmd = UC_SETSYNC;
1174         else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1175                 uc->cmd = UC_SETTAGS;
1176         else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1177                 uc->cmd = UC_SETVERBOSE;
1178         else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1179                 uc->cmd = UC_SETWIDE;
1180 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1181         else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1182                 uc->cmd = UC_SETDEBUG;
1183 #endif
1184         else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1185                 uc->cmd = UC_SETFLAG;
1186         else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1187                 uc->cmd = UC_RESETDEV;
1188         else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1189                 uc->cmd = UC_CLEARDEV;
1190         else
1191                 arg_len = 0;
1192
1193 #ifdef DEBUG_PROC_INFO
1194 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1195 #endif
1196
1197         if (!arg_len)
1198                 return -EINVAL;
1199         ptr += arg_len; len -= arg_len;
1200
1201         switch(uc->cmd) {
1202         case UC_SETSYNC:
1203         case UC_SETTAGS:
1204         case UC_SETWIDE:
1205         case UC_SETFLAG:
1206         case UC_RESETDEV:
1207         case UC_CLEARDEV:
1208                 SKIP_SPACES(ptr, len);
1209                 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1210                         ptr += arg_len; len -= arg_len;
1211                         uc->target = ~0;
1212                 } else {
1213                         GET_INT_ARG(ptr, len, target);
1214                         uc->target = (1<<target);
1215 #ifdef DEBUG_PROC_INFO
1216 printk("sym_user_command: target=%ld\n", target);
1217 #endif
1218                 }
1219                 break;
1220         }
1221
1222         switch(uc->cmd) {
1223         case UC_SETVERBOSE:
1224         case UC_SETSYNC:
1225         case UC_SETTAGS:
1226         case UC_SETWIDE:
1227                 SKIP_SPACES(ptr, len);
1228                 GET_INT_ARG(ptr, len, uc->data);
1229 #ifdef DEBUG_PROC_INFO
1230 printk("sym_user_command: data=%ld\n", uc->data);
1231 #endif
1232                 break;
1233 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1234         case UC_SETDEBUG:
1235                 while (len > 0) {
1236                         SKIP_SPACES(ptr, len);
1237                         if      ((arg_len = is_keyword(ptr, len, "alloc")))
1238                                 uc->data |= DEBUG_ALLOC;
1239                         else if ((arg_len = is_keyword(ptr, len, "phase")))
1240                                 uc->data |= DEBUG_PHASE;
1241                         else if ((arg_len = is_keyword(ptr, len, "queue")))
1242                                 uc->data |= DEBUG_QUEUE;
1243                         else if ((arg_len = is_keyword(ptr, len, "result")))
1244                                 uc->data |= DEBUG_RESULT;
1245                         else if ((arg_len = is_keyword(ptr, len, "scatter")))
1246                                 uc->data |= DEBUG_SCATTER;
1247                         else if ((arg_len = is_keyword(ptr, len, "script")))
1248                                 uc->data |= DEBUG_SCRIPT;
1249                         else if ((arg_len = is_keyword(ptr, len, "tiny")))
1250                                 uc->data |= DEBUG_TINY;
1251                         else if ((arg_len = is_keyword(ptr, len, "timing")))
1252                                 uc->data |= DEBUG_TIMING;
1253                         else if ((arg_len = is_keyword(ptr, len, "nego")))
1254                                 uc->data |= DEBUG_NEGO;
1255                         else if ((arg_len = is_keyword(ptr, len, "tags")))
1256                                 uc->data |= DEBUG_TAGS;
1257                         else if ((arg_len = is_keyword(ptr, len, "pointer")))
1258                                 uc->data |= DEBUG_POINTER;
1259                         else
1260                                 return -EINVAL;
1261                         ptr += arg_len; len -= arg_len;
1262                 }
1263 #ifdef DEBUG_PROC_INFO
1264 printk("sym_user_command: data=%ld\n", uc->data);
1265 #endif
1266                 break;
1267 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1268         case UC_SETFLAG:
1269                 while (len > 0) {
1270                         SKIP_SPACES(ptr, len);
1271                         if      ((arg_len = is_keyword(ptr, len, "no_disc")))
1272                                 uc->data &= ~SYM_DISC_ENABLED;
1273                         else
1274                                 return -EINVAL;
1275                         ptr += arg_len; len -= arg_len;
1276                 }
1277                 break;
1278         default:
1279                 break;
1280         }
1281
1282         if (len)
1283                 return -EINVAL;
1284         else {
1285                 unsigned long flags;
1286
1287                 spin_lock_irqsave(np->s.host->host_lock, flags);
1288                 sym_exec_user_command (np, uc);
1289                 spin_unlock_irqrestore(np->s.host->host_lock, flags);
1290         }
1291         return length;
1292 }
1293
1294 #endif  /* SYM_LINUX_USER_COMMAND_SUPPORT */
1295
1296
1297 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1298 /*
1299  *  Informations through the proc file system.
1300  */
1301 struct info_str {
1302         char *buffer;
1303         int length;
1304         int offset;
1305         int pos;
1306 };
1307
1308 static void copy_mem_info(struct info_str *info, char *data, int len)
1309 {
1310         if (info->pos + len > info->length)
1311                 len = info->length - info->pos;
1312
1313         if (info->pos + len < info->offset) {
1314                 info->pos += len;
1315                 return;
1316         }
1317         if (info->pos < info->offset) {
1318                 data += (info->offset - info->pos);
1319                 len  -= (info->offset - info->pos);
1320         }
1321
1322         if (len > 0) {
1323                 memcpy(info->buffer + info->pos, data, len);
1324                 info->pos += len;
1325         }
1326 }
1327
1328 static int copy_info(struct info_str *info, char *fmt, ...)
1329 {
1330         va_list args;
1331         char buf[81];
1332         int len;
1333
1334         va_start(args, fmt);
1335         len = vsprintf(buf, fmt, args);
1336         va_end(args);
1337
1338         copy_mem_info(info, buf, len);
1339         return len;
1340 }
1341
1342 /*
1343  *  Copy formatted information into the input buffer.
1344  */
1345 static int sym_host_info(struct sym_hcb *np, char *ptr, off_t offset, int len)
1346 {
1347         struct info_str info;
1348
1349         info.buffer     = ptr;
1350         info.length     = len;
1351         info.offset     = offset;
1352         info.pos        = 0;
1353
1354         copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1355                          "revision id 0x%x\n",
1356                          np->s.chip_name, np->device_id, np->revision_id);
1357         copy_info(&info, "At PCI address %s, IRQ " IRQ_FMT "\n",
1358                 pci_name(np->s.device), IRQ_PRM(np->s.irq));
1359         copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1360                          (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1361                          np->maxwide ? "Wide" : "Narrow",
1362                          np->minsync_dt ? ", DT capable" : "");
1363
1364         copy_info(&info, "Max. started commands %d, "
1365                          "max. commands per LUN %d\n",
1366                          SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1367
1368         return info.pos > info.offset? info.pos - info.offset : 0;
1369 }
1370 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1371
1372 /*
1373  *  Entry point of the scsi proc fs of the driver.
1374  *  - func = 0 means read  (returns adapter infos)
1375  *  - func = 1 means write (not yet merget from sym53c8xx)
1376  */
1377 static int sym53c8xx_proc_info(struct Scsi_Host *host, char *buffer,
1378                         char **start, off_t offset, int length, int func)
1379 {
1380         struct sym_hcb *np = sym_get_hcb(host);
1381         int retv;
1382
1383         if (func) {
1384 #ifdef  SYM_LINUX_USER_COMMAND_SUPPORT
1385                 retv = sym_user_command(np, buffer, length);
1386 #else
1387                 retv = -EINVAL;
1388 #endif
1389         } else {
1390                 if (start)
1391                         *start = buffer;
1392 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1393                 retv = sym_host_info(np, buffer, offset, length);
1394 #else
1395                 retv = -EINVAL;
1396 #endif
1397         }
1398
1399         return retv;
1400 }
1401 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1402
1403 /*
1404  *      Free controller resources.
1405  */
1406 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev)
1407 {
1408         /*
1409          *  Free O/S specific resources.
1410          */
1411         if (np->s.irq)
1412                 free_irq(np->s.irq, np);
1413         if (np->s.ioaddr)
1414                 pci_iounmap(pdev, np->s.ioaddr);
1415         if (np->s.ramaddr)
1416                 pci_iounmap(pdev, np->s.ramaddr);
1417         /*
1418          *  Free O/S independent resources.
1419          */
1420         sym_hcb_free(np);
1421
1422         sym_mfree_dma(np, sizeof(*np), "HCB");
1423 }
1424
1425 /*
1426  *  Ask/tell the system about DMA addressing.
1427  */
1428 static int sym_setup_bus_dma_mask(struct sym_hcb *np)
1429 {
1430 #if SYM_CONF_DMA_ADDRESSING_MODE > 0
1431 #if   SYM_CONF_DMA_ADDRESSING_MODE == 1
1432 #define DMA_DAC_MASK    DMA_40BIT_MASK
1433 #elif SYM_CONF_DMA_ADDRESSING_MODE == 2
1434 #define DMA_DAC_MASK    DMA_64BIT_MASK
1435 #endif
1436         if ((np->features & FE_DAC) &&
1437                         !pci_set_dma_mask(np->s.device, DMA_DAC_MASK)) {
1438                 np->use_dac = 1;
1439                 return 0;
1440         }
1441 #endif
1442
1443         if (!pci_set_dma_mask(np->s.device, DMA_32BIT_MASK))
1444                 return 0;
1445
1446         printf_warning("%s: No suitable DMA available\n", sym_name(np));
1447         return -1;
1448 }
1449
1450 /*
1451  *  Host attach and initialisations.
1452  *
1453  *  Allocate host data and ncb structure.
1454  *  Remap MMIO region.
1455  *  Do chip initialization.
1456  *  If all is OK, install interrupt handling and
1457  *  start the timer daemon.
1458  */
1459 static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1460                 int unit, struct sym_device *dev)
1461 {
1462         struct host_data *host_data;
1463         struct sym_hcb *np = NULL;
1464         struct Scsi_Host *instance = NULL;
1465         struct pci_dev *pdev = dev->pdev;
1466         unsigned long flags;
1467         struct sym_fw *fw;
1468
1469         printk(KERN_INFO
1470                 "sym%d: <%s> rev 0x%x at pci %s irq " IRQ_FMT "\n",
1471                 unit, dev->chip.name, dev->chip.revision_id,
1472                 pci_name(pdev), IRQ_PRM(pdev->irq));
1473
1474         /*
1475          *  Get the firmware for this chip.
1476          */
1477         fw = sym_find_firmware(&dev->chip);
1478         if (!fw)
1479                 goto attach_failed;
1480
1481         /*
1482          *      Allocate host_data structure
1483          */
1484         instance = scsi_host_alloc(tpnt, sizeof(*host_data));
1485         if (!instance)
1486                 goto attach_failed;
1487         host_data = (struct host_data *) instance->hostdata;
1488
1489         /*
1490          *  Allocate immediately the host control block,
1491          *  since we are only expecting to succeed. :)
1492          *  We keep track in the HCB of all the resources that
1493          *  are to be released on error.
1494          */
1495         np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1496         if (!np)
1497                 goto attach_failed;
1498         np->s.device = pdev;
1499         np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1500         host_data->ncb = np;
1501         np->s.host = instance;
1502
1503         pci_set_drvdata(pdev, np);
1504
1505         /*
1506          *  Copy some useful infos to the HCB.
1507          */
1508         np->hcb_ba      = vtobus(np);
1509         np->verbose     = sym_driver_setup.verbose;
1510         np->s.device    = pdev;
1511         np->s.unit      = unit;
1512         np->device_id   = dev->chip.device_id;
1513         np->revision_id = dev->chip.revision_id;
1514         np->features    = dev->chip.features;
1515         np->clock_divn  = dev->chip.nr_divisor;
1516         np->maxoffs     = dev->chip.offset_max;
1517         np->maxburst    = dev->chip.burst_max;
1518         np->myaddr      = dev->host_id;
1519
1520         /*
1521          *  Edit its name.
1522          */
1523         strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1524         sprintf(np->s.inst_name, "sym%d", np->s.unit);
1525
1526         if (sym_setup_bus_dma_mask(np))
1527                 goto attach_failed;
1528
1529         /*
1530          *  Try to map the controller chip to
1531          *  virtual and physical memory.
1532          */
1533         np->mmio_ba = (u32)dev->mmio_base;
1534         np->s.ioaddr    = dev->s.ioaddr;
1535         np->s.ramaddr   = dev->s.ramaddr;
1536         np->s.io_ws = (np->features & FE_IO256) ? 256 : 128;
1537
1538         /*
1539          *  Map on-chip RAM if present and supported.
1540          */
1541         if (!(np->features & FE_RAM))
1542                 dev->ram_base = 0;
1543         if (dev->ram_base) {
1544                 np->ram_ba = (u32)dev->ram_base;
1545                 np->ram_ws = (np->features & FE_RAM8K) ? 8192 : 4096;
1546         }
1547
1548         if (sym_hcb_attach(instance, fw, dev->nvram))
1549                 goto attach_failed;
1550
1551         /*
1552          *  Install the interrupt handler.
1553          *  If we synchonize the C code with SCRIPTS on interrupt,
1554          *  we do not want to share the INTR line at all.
1555          */
1556         if (request_irq(pdev->irq, sym53c8xx_intr, SA_SHIRQ, NAME53C8XX, np)) {
1557                 printf_err("%s: request irq %d failure\n",
1558                         sym_name(np), pdev->irq);
1559                 goto attach_failed;
1560         }
1561         np->s.irq = pdev->irq;
1562
1563         /*
1564          *  After SCSI devices have been opened, we cannot
1565          *  reset the bus safely, so we do it here.
1566          */
1567         spin_lock_irqsave(instance->host_lock, flags);
1568         if (sym_reset_scsi_bus(np, 0))
1569                 goto reset_failed;
1570
1571         /*
1572          *  Start the SCRIPTS.
1573          */
1574         sym_start_up (np, 1);
1575
1576         /*
1577          *  Start the timer daemon
1578          */
1579         init_timer(&np->s.timer);
1580         np->s.timer.data     = (unsigned long) np;
1581         np->s.timer.function = sym53c8xx_timer;
1582         np->s.lasttime=0;
1583         sym_timer (np);
1584
1585         /*
1586          *  Fill Linux host instance structure
1587          *  and return success.
1588          */
1589         instance->max_channel   = 0;
1590         instance->this_id       = np->myaddr;
1591         instance->max_id        = np->maxwide ? 16 : 8;
1592         instance->max_lun       = SYM_CONF_MAX_LUN;
1593         instance->unique_id     = pci_resource_start(pdev, 0);
1594         instance->cmd_per_lun   = SYM_CONF_MAX_TAG;
1595         instance->can_queue     = (SYM_CONF_MAX_START-2);
1596         instance->sg_tablesize  = SYM_CONF_MAX_SG;
1597         instance->max_cmd_len   = 16;
1598         BUG_ON(sym2_transport_template == NULL);
1599         instance->transportt    = sym2_transport_template;
1600
1601         spin_unlock_irqrestore(instance->host_lock, flags);
1602
1603         return instance;
1604
1605  reset_failed:
1606         printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1607                    "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1608         spin_unlock_irqrestore(instance->host_lock, flags);
1609  attach_failed:
1610         if (!instance)
1611                 return NULL;
1612         printf_info("%s: giving up ...\n", sym_name(np));
1613         if (np)
1614                 sym_free_resources(np, pdev);
1615         scsi_host_put(instance);
1616
1617         return NULL;
1618  }
1619
1620
1621 /*
1622  *    Detect and try to read SYMBIOS and TEKRAM NVRAM.
1623  */
1624 #if SYM_CONF_NVRAM_SUPPORT
1625 static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1626 {
1627         devp->nvram = nvp;
1628         devp->device_id = devp->chip.device_id;
1629         nvp->type = 0;
1630
1631         sym_read_nvram(devp, nvp);
1632 }
1633 #else
1634 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1635 {
1636 }
1637 #endif  /* SYM_CONF_NVRAM_SUPPORT */
1638
1639 static int __devinit sym_check_supported(struct sym_device *device)
1640 {
1641         struct sym_chip *chip;
1642         struct pci_dev *pdev = device->pdev;
1643         u_char revision;
1644         unsigned long io_port = pci_resource_start(pdev, 0);
1645         int i;
1646
1647         /*
1648          *  If user excluded this chip, do not initialize it.
1649          *  I hate this code so much.  Must kill it.
1650          */
1651         if (io_port) {
1652                 for (i = 0 ; i < 8 ; i++) {
1653                         if (sym_driver_setup.excludes[i] == io_port)
1654                                 return -ENODEV;
1655                 }
1656         }
1657
1658         /*
1659          * Check if the chip is supported.  Then copy the chip description
1660          * to our device structure so we can make it match the actual device
1661          * and options.
1662          */
1663         pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
1664         chip = sym_lookup_chip_table(pdev->device, revision);
1665         if (!chip) {
1666                 dev_info(&pdev->dev, "device not supported\n");
1667                 return -ENODEV;
1668         }
1669         memcpy(&device->chip, chip, sizeof(device->chip));
1670         device->chip.revision_id = revision;
1671
1672         return 0;
1673 }
1674
1675 /*
1676  * Ignore Symbios chips controlled by various RAID controllers.
1677  * These controllers set value 0x52414944 at RAM end - 16.
1678  */
1679 static int __devinit sym_check_raid(struct sym_device *device)
1680 {
1681         unsigned int ram_size, ram_val;
1682
1683         if (!device->s.ramaddr)
1684                 return 0;
1685
1686         if (device->chip.features & FE_RAM8K)
1687                 ram_size = 8192;
1688         else
1689                 ram_size = 4096;
1690
1691         ram_val = readl(device->s.ramaddr + ram_size - 16);
1692         if (ram_val != 0x52414944)
1693                 return 0;
1694
1695         dev_info(&device->pdev->dev,
1696                         "not initializing, driven by RAID controller.\n");
1697         return -ENODEV;
1698 }
1699
1700 static int __devinit sym_set_workarounds(struct sym_device *device)
1701 {
1702         struct sym_chip *chip = &device->chip;
1703         struct pci_dev *pdev = device->pdev;
1704         u_short status_reg;
1705
1706         /*
1707          *  (ITEM 12 of a DEL about the 896 I haven't yet).
1708          *  We must ensure the chip will use WRITE AND INVALIDATE.
1709          *  The revision number limit is for now arbitrary.
1710          */
1711         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && chip->revision_id < 0x4) {
1712                 chip->features  |= (FE_WRIE | FE_CLSE);
1713         }
1714
1715         /* If the chip can do Memory Write Invalidate, enable it */
1716         if (chip->features & FE_WRIE) {
1717                 if (pci_set_mwi(pdev))
1718                         return -ENODEV;
1719         }
1720
1721         /*
1722          *  Work around for errant bit in 895A. The 66Mhz
1723          *  capable bit is set erroneously. Clear this bit.
1724          *  (Item 1 DEL 533)
1725          *
1726          *  Make sure Config space and Features agree.
1727          *
1728          *  Recall: writes are not normal to status register -
1729          *  write a 1 to clear and a 0 to leave unchanged.
1730          *  Can only reset bits.
1731          */
1732         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1733         if (chip->features & FE_66MHZ) {
1734                 if (!(status_reg & PCI_STATUS_66MHZ))
1735                         chip->features &= ~FE_66MHZ;
1736         } else {
1737                 if (status_reg & PCI_STATUS_66MHZ) {
1738                         status_reg = PCI_STATUS_66MHZ;
1739                         pci_write_config_word(pdev, PCI_STATUS, status_reg);
1740                         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1741                 }
1742         }
1743
1744         return 0;
1745 }
1746
1747 /*
1748  *  Read and check the PCI configuration for any detected NCR
1749  *  boards and save data for attaching after all boards have
1750  *  been detected.
1751  */
1752 static void __devinit
1753 sym_init_device(struct pci_dev *pdev, struct sym_device *device)
1754 {
1755         int i = 2;
1756         struct pci_bus_region bus_addr;
1757
1758         device->host_id = SYM_SETUP_HOST_ID;
1759         device->pdev = pdev;
1760
1761         pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[1]);
1762         device->mmio_base = bus_addr.start;
1763
1764         /*
1765          * If the BAR is 64-bit, resource 2 will be occupied by the
1766          * upper 32 bits
1767          */
1768         if (!pdev->resource[i].flags)
1769                 i++;
1770         pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[i]);
1771         device->ram_base = bus_addr.start;
1772
1773 #ifdef CONFIG_SCSI_SYM53C8XX_MMIO
1774         if (device->mmio_base)
1775                 device->s.ioaddr = pci_iomap(pdev, 1,
1776                                                 pci_resource_len(pdev, 1));
1777 #endif
1778         if (!device->s.ioaddr)
1779                 device->s.ioaddr = pci_iomap(pdev, 0,
1780                                                 pci_resource_len(pdev, 0));
1781         if (device->ram_base)
1782                 device->s.ramaddr = pci_iomap(pdev, i,
1783                                                 pci_resource_len(pdev, i));
1784 }
1785
1786 /*
1787  * The NCR PQS and PDS cards are constructed as a DEC bridge
1788  * behind which sits a proprietary NCR memory controller and
1789  * either four or two 53c875s as separate devices.  We can tell
1790  * if an 875 is part of a PQS/PDS or not since if it is, it will
1791  * be on the same bus as the memory controller.  In its usual
1792  * mode of operation, the 875s are slaved to the memory
1793  * controller for all transfers.  To operate with the Linux
1794  * driver, the memory controller is disabled and the 875s
1795  * freed to function independently.  The only wrinkle is that
1796  * the preset SCSI ID (which may be zero) must be read in from
1797  * a special configuration space register of the 875.
1798  */
1799 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1800 {
1801         int slot;
1802         u8 tmp;
1803
1804         for (slot = 0; slot < 256; slot++) {
1805                 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1806
1807                 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1808                         pci_dev_put(memc);
1809                         continue;
1810                 }
1811
1812                 /* bit 1: allow individual 875 configuration */
1813                 pci_read_config_byte(memc, 0x44, &tmp);
1814                 if ((tmp & 0x2) == 0) {
1815                         tmp |= 0x2;
1816                         pci_write_config_byte(memc, 0x44, tmp);
1817                 }
1818
1819                 /* bit 2: drive individual 875 interrupts to the bus */
1820                 pci_read_config_byte(memc, 0x45, &tmp);
1821                 if ((tmp & 0x4) == 0) {
1822                         tmp |= 0x4;
1823                         pci_write_config_byte(memc, 0x45, tmp);
1824                 }
1825
1826                 pci_dev_put(memc);
1827                 break;
1828         }
1829
1830         pci_read_config_byte(pdev, 0x84, &tmp);
1831         sym_dev->host_id = tmp;
1832 }
1833
1834 /*
1835  *  Called before unloading the module.
1836  *  Detach the host.
1837  *  We have to free resources and halt the NCR chip.
1838  */
1839 static int sym_detach(struct sym_hcb *np, struct pci_dev *pdev)
1840 {
1841         printk("%s: detaching ...\n", sym_name(np));
1842
1843         del_timer_sync(&np->s.timer);
1844
1845         /*
1846          * Reset NCR chip.
1847          * We should use sym_soft_reset(), but we don't want to do
1848          * so, since we may not be safe if interrupts occur.
1849          */
1850         printk("%s: resetting chip\n", sym_name(np));
1851         OUTB(np, nc_istat, SRST);
1852         INB(np, nc_mbox1);
1853         udelay(10);
1854         OUTB(np, nc_istat, 0);
1855
1856         sym_free_resources(np, pdev);
1857
1858         return 1;
1859 }
1860
1861 /*
1862  * Driver host template.
1863  */
1864 static struct scsi_host_template sym2_template = {
1865         .module                 = THIS_MODULE,
1866         .name                   = "sym53c8xx",
1867         .info                   = sym53c8xx_info,
1868         .queuecommand           = sym53c8xx_queue_command,
1869         .slave_alloc            = sym53c8xx_slave_alloc,
1870         .slave_configure        = sym53c8xx_slave_configure,
1871         .slave_destroy          = sym53c8xx_slave_destroy,
1872         .eh_abort_handler       = sym53c8xx_eh_abort_handler,
1873         .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1874         .eh_bus_reset_handler   = sym53c8xx_eh_bus_reset_handler,
1875         .eh_host_reset_handler  = sym53c8xx_eh_host_reset_handler,
1876         .this_id                = 7,
1877         .use_clustering         = ENABLE_CLUSTERING,
1878         .max_sectors            = 0xFFFF,
1879 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1880         .proc_info              = sym53c8xx_proc_info,
1881         .proc_name              = NAME53C8XX,
1882 #endif
1883 };
1884
1885 static int attach_count;
1886
1887 static int __devinit sym2_probe(struct pci_dev *pdev,
1888                                 const struct pci_device_id *ent)
1889 {
1890         struct sym_device sym_dev;
1891         struct sym_nvram nvram;
1892         struct Scsi_Host *instance;
1893
1894         memset(&sym_dev, 0, sizeof(sym_dev));
1895         memset(&nvram, 0, sizeof(nvram));
1896
1897         if (pci_enable_device(pdev))
1898                 goto leave;
1899
1900         pci_set_master(pdev);
1901
1902         if (pci_request_regions(pdev, NAME53C8XX))
1903                 goto disable;
1904
1905         sym_init_device(pdev, &sym_dev);
1906         if (sym_check_supported(&sym_dev))
1907                 goto free;
1908
1909         if (sym_check_raid(&sym_dev))
1910                 goto leave;     /* Don't disable the device */
1911
1912         if (sym_set_workarounds(&sym_dev))
1913                 goto free;
1914
1915         sym_config_pqs(pdev, &sym_dev);
1916
1917         sym_get_nvram(&sym_dev, &nvram);
1918
1919         instance = sym_attach(&sym2_template, attach_count, &sym_dev);
1920         if (!instance)
1921                 goto free;
1922
1923         if (scsi_add_host(instance, &pdev->dev))
1924                 goto detach;
1925         scsi_scan_host(instance);
1926
1927         attach_count++;
1928
1929         return 0;
1930
1931  detach:
1932         sym_detach(pci_get_drvdata(pdev), pdev);
1933  free:
1934         pci_release_regions(pdev);
1935  disable:
1936         pci_disable_device(pdev);
1937  leave:
1938         return -ENODEV;
1939 }
1940
1941 static void __devexit sym2_remove(struct pci_dev *pdev)
1942 {
1943         struct sym_hcb *np = pci_get_drvdata(pdev);
1944         struct Scsi_Host *host = np->s.host;
1945
1946         scsi_remove_host(host);
1947         scsi_host_put(host);
1948
1949         sym_detach(np, pdev);
1950
1951         pci_release_regions(pdev);
1952         pci_disable_device(pdev);
1953
1954         attach_count--;
1955 }
1956
1957 static void sym2_get_signalling(struct Scsi_Host *shost)
1958 {
1959         struct sym_hcb *np = sym_get_hcb(shost);
1960         enum spi_signal_type type;
1961
1962         switch (np->scsi_mode) {
1963         case SMODE_SE:
1964                 type = SPI_SIGNAL_SE;
1965                 break;
1966         case SMODE_LVD:
1967                 type = SPI_SIGNAL_LVD;
1968                 break;
1969         case SMODE_HVD:
1970                 type = SPI_SIGNAL_HVD;
1971                 break;
1972         default:
1973                 type = SPI_SIGNAL_UNKNOWN;
1974                 break;
1975         }
1976         spi_signalling(shost) = type;
1977 }
1978
1979 static void sym2_set_offset(struct scsi_target *starget, int offset)
1980 {
1981         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1982         struct sym_hcb *np = sym_get_hcb(shost);
1983         struct sym_tcb *tp = &np->target[starget->id];
1984
1985         tp->tgoal.offset = offset;
1986         tp->tgoal.check_nego = 1;
1987 }
1988
1989 static void sym2_set_period(struct scsi_target *starget, int period)
1990 {
1991         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1992         struct sym_hcb *np = sym_get_hcb(shost);
1993         struct sym_tcb *tp = &np->target[starget->id];
1994
1995         /* have to have DT for these transfers, but DT will also
1996          * set width, so check that this is allowed */
1997         if (period <= np->minsync && spi_width(starget))
1998                 tp->tgoal.dt = 1;
1999
2000         tp->tgoal.period = period;
2001         tp->tgoal.check_nego = 1;
2002 }
2003
2004 static void sym2_set_width(struct scsi_target *starget, int width)
2005 {
2006         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2007         struct sym_hcb *np = sym_get_hcb(shost);
2008         struct sym_tcb *tp = &np->target[starget->id];
2009
2010         /* It is illegal to have DT set on narrow transfers.  If DT is
2011          * clear, we must also clear IU and QAS.  */
2012         if (width == 0)
2013                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2014
2015         tp->tgoal.width = width;
2016         tp->tgoal.check_nego = 1;
2017 }
2018
2019 static void sym2_set_dt(struct scsi_target *starget, int dt)
2020 {
2021         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2022         struct sym_hcb *np = sym_get_hcb(shost);
2023         struct sym_tcb *tp = &np->target[starget->id];
2024
2025         /* We must clear QAS and IU if DT is clear */
2026         if (dt)
2027                 tp->tgoal.dt = 1;
2028         else
2029                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2030         tp->tgoal.check_nego = 1;
2031 }
2032
2033 #if 0
2034 static void sym2_set_iu(struct scsi_target *starget, int iu)
2035 {
2036         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2037         struct sym_hcb *np = sym_get_hcb(shost);
2038         struct sym_tcb *tp = &np->target[starget->id];
2039
2040         if (iu)
2041                 tp->tgoal.iu = tp->tgoal.dt = 1;
2042         else
2043                 tp->tgoal.iu = 0;
2044         tp->tgoal.check_nego = 1;
2045 }
2046
2047 static void sym2_set_qas(struct scsi_target *starget, int qas)
2048 {
2049         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2050         struct sym_hcb *np = sym_get_hcb(shost);
2051         struct sym_tcb *tp = &np->target[starget->id];
2052
2053         if (qas)
2054                 tp->tgoal.dt = tp->tgoal.qas = 1;
2055         else
2056                 tp->tgoal.qas = 0;
2057         tp->tgoal.check_nego = 1;
2058 }
2059 #endif
2060
2061 static struct spi_function_template sym2_transport_functions = {
2062         .set_offset     = sym2_set_offset,
2063         .show_offset    = 1,
2064         .set_period     = sym2_set_period,
2065         .show_period    = 1,
2066         .set_width      = sym2_set_width,
2067         .show_width     = 1,
2068         .set_dt         = sym2_set_dt,
2069         .show_dt        = 1,
2070 #if 0
2071         .set_iu         = sym2_set_iu,
2072         .show_iu        = 1,
2073         .set_qas        = sym2_set_qas,
2074         .show_qas       = 1,
2075 #endif
2076         .get_signalling = sym2_get_signalling,
2077 };
2078
2079 static struct pci_device_id sym2_id_table[] __devinitdata = {
2080         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2081           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2082         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2083           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2084         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2085           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2086         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2087           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2088         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2089           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2090         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2091           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2092         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2093           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2094         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2095           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2096         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2097           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2098         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2099           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2100         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2101           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2102         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2103           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2104         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2105           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2106         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2107           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2108         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2109           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2110         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2111           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2112         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2113           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2114         { 0, }
2115 };
2116
2117 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2118
2119 static struct pci_driver sym2_driver = {
2120         .name           = NAME53C8XX,
2121         .id_table       = sym2_id_table,
2122         .probe          = sym2_probe,
2123         .remove         = __devexit_p(sym2_remove),
2124 };
2125
2126 static int __init sym2_init(void)
2127 {
2128         int error;
2129
2130         sym2_setup_params();
2131         sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2132         if (!sym2_transport_template)
2133                 return -ENODEV;
2134
2135         error = pci_register_driver(&sym2_driver);
2136         if (error)
2137                 spi_release_transport(sym2_transport_template);
2138         return error;
2139 }
2140
2141 static void __exit sym2_exit(void)
2142 {
2143         pci_unregister_driver(&sym2_driver);
2144         spi_release_transport(sym2_transport_template);
2145 }
2146
2147 module_init(sym2_init);
2148 module_exit(sym2_exit);