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         if ((base & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
 165                 base &= PCI_BASE_ADDRESS_IO_MASK;
 166         } else {
 167                 base &= PCI_BASE_ADDRESS_MEM_MASK;
 168         }
 169
 170         *basep = base;
 171         return index;
 172 #undef PCI_BAR_OFFSET
 173 }
 174
 175 static struct scsi_transport_template *sym2_transport_template = NULL;
 176
 177 /*
 178  *  Used by the eh thread to wait for command completion.
 179  *  It is allocated on the eh thread stack.
 180  */
 181 struct sym_eh_wait {
 182         struct completion done;
 183         struct timer_list timer;
 184         void (*old_done)(struct scsi_cmnd *);
 185         int to_do;
 186         int timed_out;
 187 };
 188
 189 /*
 190  *  Driver private area in the SCSI command structure.
 191  */
 192 struct sym_ucmd {               /* Override the SCSI pointer structure */
 193         dma_addr_t data_mapping;
 194         u_char  data_mapped;
 195         struct sym_eh_wait *eh_wait;
 196 };
 197
 198 #define SYM_UCMD_PTR(cmd)  ((struct sym_ucmd *)(&(cmd)->SCp))
 199 #define SYM_SOFTC_PTR(cmd) sym_get_hcb(cmd->device->host)
 200
 201 static void __unmap_scsi_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
 202 {
 203         int dma_dir = cmd->sc_data_direction;
 204
 205         switch(SYM_UCMD_PTR(cmd)->data_mapped) {
 206         case 2:
 207                 pci_unmap_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
 208                 break;
 209         case 1:
 210                 pci_unmap_single(pdev, SYM_UCMD_PTR(cmd)->data_mapping,
 211                                  cmd->request_bufflen, dma_dir);
 212                 break;
 213         }
 214         SYM_UCMD_PTR(cmd)->data_mapped = 0;
 215 }
 216
 217 static dma_addr_t __map_scsi_single_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
 218 {
 219         dma_addr_t mapping;
 220         int dma_dir = cmd->sc_data_direction;
 221
 222         mapping = pci_map_single(pdev, cmd->request_buffer,
 223                                  cmd->request_bufflen, dma_dir);
 224         if (mapping) {
 225                 SYM_UCMD_PTR(cmd)->data_mapped  = 1;
 226                 SYM_UCMD_PTR(cmd)->data_mapping = mapping;
 227         }
 228
 229         return mapping;
 230 }
 231
 232 static int __map_scsi_sg_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
 233 {
 234         int use_sg;
 235         int dma_dir = cmd->sc_data_direction;
 236
 237         use_sg = pci_map_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
 238         if (use_sg > 0) {
 239                 SYM_UCMD_PTR(cmd)->data_mapped  = 2;
 240                 SYM_UCMD_PTR(cmd)->data_mapping = use_sg;
 241         }
 242
 243         return use_sg;
 244 }
 245
 246 #define unmap_scsi_data(np, cmd)        \
 247                 __unmap_scsi_data(np->s.device, cmd)
 248 #define map_scsi_single_data(np, cmd)   \
 249                 __map_scsi_single_data(np->s.device, cmd)
 250 #define map_scsi_sg_data(np, cmd)       \
 251                 __map_scsi_sg_data(np->s.device, cmd)
 252 /*
 253  *  Complete a pending CAM CCB.
 254  */
 255 void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *cmd)
 256 {
 257         unmap_scsi_data(np, cmd);
 258         cmd->scsi_done(cmd);
 259 }
 260
 261 static void sym_xpt_done2(struct sym_hcb *np, struct scsi_cmnd *cmd, int cam_status)
 262 {
 263         sym_set_cam_status(cmd, cam_status);
 264         sym_xpt_done(np, cmd);
 265 }
 266
 267
 268 /*
 269  *  Tell the SCSI layer about a BUS RESET.
 270  */
 271 void sym_xpt_async_bus_reset(struct sym_hcb *np)
 272 {
 273         printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
 274         np->s.settle_time = jiffies + sym_driver_setup.settle_delay * HZ;
 275         np->s.settle_time_valid = 1;
 276         if (sym_verbose >= 2)
 277                 printf_info("%s: command processing suspended for %d seconds\n",
 278                             sym_name(np), sym_driver_setup.settle_delay);
 279 }
 280
 281 /*
 282  *  Tell the SCSI layer about a BUS DEVICE RESET message sent.
 283  */
 284 void sym_xpt_async_sent_bdr(struct sym_hcb *np, int target)
 285 {
 286         printf_notice("%s: TARGET %d has been reset.\n", sym_name(np), target);
 287 }
 288
 289 /*
 290  *  Choose the more appropriate CAM status if
 291  *  the IO encountered an extended error.
 292  */
 293 static int sym_xerr_cam_status(int cam_status, int x_status)
 294 {
 295         if (x_status) {
 296                 if      (x_status & XE_PARITY_ERR)
 297                         cam_status = DID_PARITY;
 298                 else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN))
 299                         cam_status = DID_ERROR;
 300                 else if (x_status & XE_BAD_PHASE)
 301                         cam_status = DID_ERROR;
 302                 else
 303                         cam_status = DID_ERROR;
 304         }
 305         return cam_status;
 306 }
 307
 308 /*
 309  *  Build CAM result for a failed or auto-sensed IO.
 310  */
 311 void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid)
 312 {
 313         struct scsi_cmnd *cmd = cp->cmd;
 314         u_int cam_status, scsi_status, drv_status;
 315
 316         drv_status  = 0;
 317         cam_status  = DID_OK;
 318         scsi_status = cp->ssss_status;
 319
 320         if (cp->host_flags & HF_SENSE) {
 321                 scsi_status = cp->sv_scsi_status;
 322                 resid = cp->sv_resid;
 323                 if (sym_verbose && cp->sv_xerr_status)
 324                         sym_print_xerr(cmd, cp->sv_xerr_status);
 325                 if (cp->host_status == HS_COMPLETE &&
 326                     cp->ssss_status == S_GOOD &&
 327                     cp->xerr_status == 0) {
 328                         cam_status = sym_xerr_cam_status(DID_OK,
 329                                                          cp->sv_xerr_status);
 330                         drv_status = DRIVER_SENSE;
 331                         /*
 332                          *  Bounce back the sense data to user.
 333                          */
 334                         memset(&cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
 335                         memcpy(cmd->sense_buffer, cp->sns_bbuf,
 336                               min(sizeof(cmd->sense_buffer),
 337                                   (size_t)SYM_SNS_BBUF_LEN));
 338 #if 0
 339                         /*
 340                          *  If the device reports a UNIT ATTENTION condition
 341                          *  due to a RESET condition, we should consider all
 342                          *  disconnect CCBs for this unit as aborted.
 343                          */
 344                         if (1) {
 345                                 u_char *p;
 346                                 p  = (u_char *) cmd->sense_data;
 347                                 if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
 348                                         sym_clear_tasks(np, DID_ABORT,
 349                                                         cp->target,cp->lun, -1);
 350                         }
 351 #endif
 352                 } else {
 353                         /*
 354                          * Error return from our internal request sense.  This
 355                          * is bad: we must clear the contingent allegiance
 356                          * condition otherwise the device will always return
 357                          * BUSY.  Use a big stick.
 358                          */
 359                         sym_reset_scsi_target(np, cmd->device->id);
 360                         cam_status = DID_ERROR;
 361                 }
 362         } else if (cp->host_status == HS_COMPLETE)      /* Bad SCSI status */
 363                 cam_status = DID_OK;
 364         else if (cp->host_status == HS_SEL_TIMEOUT)     /* Selection timeout */
 365                 cam_status = DID_NO_CONNECT;
 366         else if (cp->host_status == HS_UNEXPECTED)      /* Unexpected BUS FREE*/
 367                 cam_status = DID_ERROR;
 368         else {                                          /* Extended error */
 369                 if (sym_verbose) {
 370                         sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
 371                                 cp->host_status, cp->ssss_status,
 372                                 cp->xerr_status);
 373                 }
 374                 /*
 375                  *  Set the most appropriate value for CAM status.
 376                  */
 377                 cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
 378         }
 379         cmd->resid = resid;
 380         cmd->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
 381 }
 382
 383
 384 /*
 385  *  Build the scatter/gather array for an I/O.
 386  */
 387
 388 static int sym_scatter_no_sglist(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
 389 {
 390         struct sym_tblmove *data = &cp->phys.data[SYM_CONF_MAX_SG-1];
 391         int segment;
 392
 393         cp->data_len = cmd->request_bufflen;
 394
 395         if (cmd->request_bufflen) {
 396                 dma_addr_t baddr = map_scsi_single_data(np, cmd);
 397                 if (baddr) {
 398                         sym_build_sge(np, data, baddr, cmd->request_bufflen);
 399                         segment = 1;
 400                 } else {
 401                         segment = -2;
 402                 }
 403         } else {
 404                 segment = 0;
 405         }
 406
 407         return segment;
 408 }
 409
 410 static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
 411 {
 412         int segment;
 413         int use_sg = (int) cmd->use_sg;
 414
 415         cp->data_len = 0;
 416
 417         if (!use_sg)
 418                 segment = sym_scatter_no_sglist(np, cp, cmd);
 419         else if ((use_sg = map_scsi_sg_data(np, cmd)) > 0) {
 420                 struct scatterlist *scatter = (struct scatterlist *)cmd->buffer;
 421                 struct sym_tblmove *data;
 422
 423                 if (use_sg > SYM_CONF_MAX_SG) {
 424                         unmap_scsi_data(np, cmd);
 425                         return -1;
 426                 }
 427
 428                 data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
 429
 430                 for (segment = 0; segment < use_sg; segment++) {
 431                         dma_addr_t baddr = sg_dma_address(&scatter[segment]);
 432                         unsigned int len = sg_dma_len(&scatter[segment]);
 433
 434                         sym_build_sge(np, &data[segment], baddr, len);
 435                         cp->data_len += len;
 436                 }
 437         } else {
 438                 segment = -2;
 439         }
 440
 441         return segment;
 442 }
 443
 444 /*
 445  *  Queue a SCSI command.
 446  */
 447 static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd)
 448 {
 449         struct scsi_device *sdev = cmd->device;
 450         struct sym_tcb *tp;
 451         struct sym_lcb *lp;
 452         struct sym_ccb *cp;
 453         int     order;
 454
 455         /*
 456          *  Minimal checkings, so that we will not
 457          *  go outside our tables.
 458          */
 459         if (sdev->id == np->myaddr ||
 460             sdev->id >= SYM_CONF_MAX_TARGET ||
 461             sdev->lun >= SYM_CONF_MAX_LUN) {
 462                 sym_xpt_done2(np, cmd, CAM_DEV_NOT_THERE);
 463                 return 0;
 464         }
 465
 466         /*
 467          *  Retrieve the target descriptor.
 468          */
 469         tp = &np->target[sdev->id];
 470
 471         /*
 472          *  Complete the 1st INQUIRY command with error
 473          *  condition if the device is flagged NOSCAN
 474          *  at BOOT in the NVRAM. This may speed up
 475          *  the boot and maintain coherency with BIOS
 476          *  device numbering. Clearing the flag allows
 477          *  user to rescan skipped devices later.
 478          *  We also return error for devices not flagged
 479          *  for SCAN LUNS in the NVRAM since some mono-lun
 480          *  devices behave badly when asked for some non
 481          *  zero LUN. Btw, this is an absolute hack.:-)
 482          */
 483         if (cmd->cmnd[0] == 0x12 || cmd->cmnd[0] == 0x0) {
 484                 if ((tp->usrflags & SYM_SCAN_BOOT_DISABLED) ||
 485                     ((tp->usrflags & SYM_SCAN_LUNS_DISABLED) &&
 486                      sdev->lun != 0)) {
 487                         tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
 488                         sym_xpt_done2(np, cmd, CAM_DEV_NOT_THERE);
 489                         return 0;
 490                 }
 491         }
 492
 493         /*
 494          *  Select tagged/untagged.
 495          */
 496         lp = sym_lp(tp, sdev->lun);
 497         order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
 498
 499         /*
 500          *  Queue the SCSI IO.
 501          */
 502         cp = sym_get_ccb(np, cmd, order);
 503         if (!cp)
 504                 return 1;       /* Means resource shortage */
 505         sym_queue_scsiio(np, cmd, cp);
 506         return 0;
 507 }
 508
 509 /*
 510  *  Setup buffers and pointers that address the CDB.
 511  */
 512 static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
 513 {
 514         u32     cmd_ba;
 515         int     cmd_len;
 516
 517         /*
 518          *  CDB is 16 bytes max.
 519          */
 520         if (cmd->cmd_len > sizeof(cp->cdb_buf)) {
 521                 sym_set_cam_status(cp->cmd, CAM_REQ_INVALID);
 522                 return -1;
 523         }
 524
 525         memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len);
 526         cmd_ba  = CCB_BA (cp, cdb_buf[0]);
 527         cmd_len = cmd->cmd_len;
 528
 529         cp->phys.cmd.addr       = cpu_to_scr(cmd_ba);
 530         cp->phys.cmd.size       = cpu_to_scr(cmd_len);
 531
 532         return 0;
 533 }
 534
 535 /*
 536  *  Setup pointers that address the data and start the I/O.
 537  */
 538 int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
 539 {
 540         int dir;
 541         struct sym_tcb *tp = &np->target[cp->target];
 542         struct sym_lcb *lp = sym_lp(tp, cp->lun);
 543
 544         /*
 545          *  Build the CDB.
 546          */
 547         if (sym_setup_cdb(np, cmd, cp))
 548                 goto out_abort;
 549
 550         /*
 551          *  No direction means no data.
 552          */
 553         dir = cmd->sc_data_direction;
 554         if (dir != DMA_NONE) {
 555                 cp->segments = sym_scatter(np, cp, cmd);
 556                 if (cp->segments < 0) {
 557                         if (cp->segments == -2)
 558                                 sym_set_cam_status(cmd, CAM_RESRC_UNAVAIL);
 559                         else
 560                                 sym_set_cam_status(cmd, CAM_REQ_TOO_BIG);
 561                         goto out_abort;
 562                 }
 563         } else {
 564                 cp->data_len = 0;
 565                 cp->segments = 0;
 566         }
 567
 568         /*
 569          *  Set data pointers.
 570          */
 571         sym_setup_data_pointers(np, cp, dir);
 572
 573         /*
 574          *  When `#ifed 1', the code below makes the driver
 575          *  panic on the first attempt to write to a SCSI device.
 576          *  It is the first test we want to do after a driver
 577          *  change that does not seem obviously safe. :)
 578          */
 579 #if 0
 580         switch (cp->cdb_buf[0]) {
 581         case 0x0A: case 0x2A: case 0xAA:
 582                 panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
 583                 break;
 584         default:
 585                 break;
 586         }
 587 #endif
 588
 589         /*
 590          *      activate this job.
 591          */
 592         if (lp)
 593                 sym_start_next_ccbs(np, lp, 2);
 594         else
 595                 sym_put_start_queue(np, cp);
 596         return 0;
 597
 598 out_abort:
 599         sym_free_ccb(np, cp);
 600         sym_xpt_done(np, cmd);
 601         return 0;
 602 }
 603
 604
 605 /*
 606  *  timer daemon.
 607  *
 608  *  Misused to keep the driver running when
 609  *  interrupts are not configured correctly.
 610  */
 611 static void sym_timer(struct sym_hcb *np)
 612 {
 613         unsigned long thistime = jiffies;
 614
 615         /*
 616          *  Restart the timer.
 617          */
 618         np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
 619         add_timer(&np->s.timer);
 620
 621         /*
 622          *  If we are resetting the ncr, wait for settle_time before
 623          *  clearing it. Then command processing will be resumed.
 624          */
 625         if (np->s.settle_time_valid) {
 626                 if (time_before_eq(np->s.settle_time, thistime)) {
 627                         if (sym_verbose >= 2 )
 628                                 printk("%s: command processing resumed\n",
 629                                        sym_name(np));
 630                         np->s.settle_time_valid = 0;
 631                 }
 632                 return;
 633         }
 634
 635         /*
 636          *      Nothing to do for now, but that may come.
 637          */
 638         if (np->s.lasttime + 4*HZ < thistime) {
 639                 np->s.lasttime = thistime;
 640         }
 641
 642 #ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
 643         /*
 644          *  Some way-broken PCI bridges may lead to
 645          *  completions being lost when the clearing
 646          *  of the INTFLY flag by the CPU occurs
 647          *  concurrently with the chip raising this flag.
 648          *  If this ever happen, lost completions will
 649          * be reaped here.
 650          */
 651         sym_wakeup_done(np);
 652 #endif
 653 }
 654
 655
 656 /*
 657  *  PCI BUS error handler.
 658  */
 659 void sym_log_bus_error(struct sym_hcb *np)
 660 {
 661         u_short pci_sts;
 662         pci_read_config_word(np->s.device, PCI_STATUS, &pci_sts);
 663         if (pci_sts & 0xf900) {
 664                 pci_write_config_word(np->s.device, PCI_STATUS, pci_sts);
 665                 printf("%s: PCI STATUS = 0x%04x\n",
 666                         sym_name(np), pci_sts & 0xf900);
 667         }
 668 }
 669
 670 /*
 671  * queuecommand method.  Entered with the host adapter lock held and
 672  * interrupts disabled.
 673  */
 674 static int sym53c8xx_queue_command(struct scsi_cmnd *cmd,
 675                                         void (*done)(struct scsi_cmnd *))
 676 {
 677         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
 678         struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
 679         int sts = 0;
 680
 681         cmd->scsi_done     = done;
 682         memset(ucp, 0, sizeof(*ucp));
 683
 684         /*
 685          *  Shorten our settle_time if needed for
 686          *  this command not to time out.
 687          */
 688         if (np->s.settle_time_valid && cmd->timeout_per_command) {
 689                 unsigned long tlimit = jiffies + cmd->timeout_per_command;
 690                 tlimit -= SYM_CONF_TIMER_INTERVAL*2;
 691                 if (time_after(np->s.settle_time, tlimit)) {
 692                         np->s.settle_time = tlimit;
 693                 }
 694         }
 695
 696         if (np->s.settle_time_valid)
 697                 return SCSI_MLQUEUE_HOST_BUSY;
 698
 699         sts = sym_queue_command(np, cmd);
 700         if (sts)
 701                 return SCSI_MLQUEUE_HOST_BUSY;
 702         return 0;
 703 }
 704
 705 /*
 706  *  Linux entry point of the interrupt handler.
 707  */
 708 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs)
 709 {
 710         unsigned long flags;
 711         struct sym_hcb *np = (struct sym_hcb *)dev_id;
 712
 713         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
 714
 715         spin_lock_irqsave(np->s.host->host_lock, flags);
 716         sym_interrupt(np);
 717         spin_unlock_irqrestore(np->s.host->host_lock, flags);
 718
 719         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
 720
 721         return IRQ_HANDLED;
 722 }
 723
 724 /*
 725  *  Linux entry point of the timer handler
 726  */
 727 static void sym53c8xx_timer(unsigned long npref)
 728 {
 729         struct sym_hcb *np = (struct sym_hcb *)npref;
 730         unsigned long flags;
 731
 732         spin_lock_irqsave(np->s.host->host_lock, flags);
 733         sym_timer(np);
 734         spin_unlock_irqrestore(np->s.host->host_lock, flags);
 735 }
 736
 737
 738 /*
 739  *  What the eh thread wants us to perform.
 740  */
 741 #define SYM_EH_ABORT            0
 742 #define SYM_EH_DEVICE_RESET     1
 743 #define SYM_EH_BUS_RESET        2
 744 #define SYM_EH_HOST_RESET       3
 745
 746 /*
 747  *  What we will do regarding the involved SCSI command.
 748  */
 749 #define SYM_EH_DO_IGNORE        0
 750 #define SYM_EH_DO_COMPLETE      1
 751 #define SYM_EH_DO_WAIT          2
 752
 753 /*
 754  *  Our general completion handler.
 755  */
 756 static void __sym_eh_done(struct scsi_cmnd *cmd, int timed_out)
 757 {
 758         struct sym_eh_wait *ep = SYM_UCMD_PTR(cmd)->eh_wait;
 759         if (!ep)
 760                 return;
 761
 762         /* Try to avoid a race here (not 100% safe) */
 763         if (!timed_out) {
 764                 ep->timed_out = 0;
 765                 if (ep->to_do == SYM_EH_DO_WAIT && !del_timer(&ep->timer))
 766                         return;
 767         }
 768
 769         /* Revert everything */
 770         SYM_UCMD_PTR(cmd)->eh_wait = NULL;
 771         cmd->scsi_done = ep->old_done;
 772
 773         /* Wake up the eh thread if it wants to sleep */
 774         if (ep->to_do == SYM_EH_DO_WAIT)
 775                 complete(&ep->done);
 776 }
 777
 778 /*
 779  *  scsi_done() alias when error recovery is in progress.
 780  */
 781 static void sym_eh_done(struct scsi_cmnd *cmd) { __sym_eh_done(cmd, 0); }
 782
 783 /*
 784  *  Some timeout handler to avoid waiting too long.
 785  */
 786 static void sym_eh_timeout(u_long p) { __sym_eh_done((struct scsi_cmnd *)p, 1); }
 787
 788 /*
 789  *  Generic method for our eh processing.
 790  *  The 'op' argument tells what we have to do.
 791  */
 792 static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
 793 {
 794         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
 795         SYM_QUEHEAD *qp;
 796         int to_do = SYM_EH_DO_IGNORE;
 797         int sts = -1;
 798         struct sym_eh_wait eh, *ep = &eh;
 799
 800         dev_warn(&cmd->device->sdev_gendev, "%s operation started.\n", opname);
 801
 802 #if 0
 803         /* This one should be the result of some race, thus to ignore */
 804         if (cmd->serial_number != cmd->serial_number_at_timeout)
 805                 goto prepare;
 806 #endif
 807
 808         /* This one is queued in some place -> to wait for completion */
 809         FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
 810                 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
 811                 if (cp->cmd == cmd) {
 812                         to_do = SYM_EH_DO_WAIT;
 813                         goto prepare;
 814                 }
 815         }
 816
 817 prepare:
 818         /* Prepare stuff to either ignore, complete or wait for completion */
 819         switch(to_do) {
 820         default:
 821         case SYM_EH_DO_IGNORE:
 822                 break;
 823         case SYM_EH_DO_WAIT:
 824                 init_completion(&ep->done);
 825                 /* fall through */
 826         case SYM_EH_DO_COMPLETE:
 827                 ep->old_done = cmd->scsi_done;
 828                 cmd->scsi_done = sym_eh_done;
 829                 SYM_UCMD_PTR(cmd)->eh_wait = ep;
 830         }
 831
 832         /* Try to proceed the operation we have been asked for */
 833         sts = -1;
 834         switch(op) {
 835         case SYM_EH_ABORT:
 836                 sts = sym_abort_scsiio(np, cmd, 1);
 837                 break;
 838         case SYM_EH_DEVICE_RESET:
 839                 sts = sym_reset_scsi_target(np, cmd->device->id);
 840                 break;
 841         case SYM_EH_BUS_RESET:
 842                 sym_reset_scsi_bus(np, 1);
 843                 sts = 0;
 844                 break;
 845         case SYM_EH_HOST_RESET:
 846                 sym_reset_scsi_bus(np, 0);
 847                 sym_start_up (np, 1);
 848                 sts = 0;
 849                 break;
 850         default:
 851                 break;
 852         }
 853
 854         /* On error, restore everything and cross fingers :) */
 855         if (sts) {
 856                 SYM_UCMD_PTR(cmd)->eh_wait = NULL;
 857                 cmd->scsi_done = ep->old_done;
 858                 to_do = SYM_EH_DO_IGNORE;
 859         }
 860
 861         ep->to_do = to_do;
 862         /* Complete the command with locks held as required by the driver */
 863         if (to_do == SYM_EH_DO_COMPLETE)
 864                 sym_xpt_done2(np, cmd, CAM_REQ_ABORTED);
 865
 866         /* Wait for completion with locks released, as required by kernel */
 867         if (to_do == SYM_EH_DO_WAIT) {
 868                 init_timer(&ep->timer);
 869                 ep->timer.expires = jiffies + (5*HZ);
 870                 ep->timer.function = sym_eh_timeout;
 871                 ep->timer.data = (u_long)cmd;
 872                 ep->timed_out = 1;      /* Be pessimistic for once :) */
 873                 add_timer(&ep->timer);
 874                 spin_unlock_irq(np->s.host->host_lock);
 875                 wait_for_completion(&ep->done);
 876                 spin_lock_irq(np->s.host->host_lock);
 877                 if (ep->timed_out)
 878                         sts = -2;
 879         }
 880         dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
 881                         sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
 882         return sts ? SCSI_FAILED : SCSI_SUCCESS;
 883 }
 884
 885
 886 /*
 887  * Error handlers called from the eh thread (one thread per HBA).
 888  */
 889 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
 890 {
 891         return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
 892 }
 893
 894 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
 895 {
 896         return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
 897 }
 898
 899 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
 900 {
 901         return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
 902 }
 903
 904 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
 905 {
 906         return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
 907 }
 908
 909 /*
 910  *  Tune device queuing depth, according to various limits.
 911  */
 912 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
 913 {
 914         struct sym_lcb *lp = sym_lp(tp, lun);
 915         u_short oldtags;
 916
 917         if (!lp)
 918                 return;
 919
 920         oldtags = lp->s.reqtags;
 921
 922         if (reqtags > lp->s.scdev_depth)
 923                 reqtags = lp->s.scdev_depth;
 924
 925         lp->started_limit = reqtags ? reqtags : 2;
 926         lp->started_max   = 1;
 927         lp->s.reqtags     = reqtags;
 928
 929         if (reqtags != oldtags) {
 930                 dev_info(&tp->sdev->sdev_target->dev,
 931                          "tagged command queuing %s, command queue depth %d.\n",
 932                           lp->s.reqtags ? "enabled" : "disabled",
 933                           lp->started_limit);
 934         }
 935 }
 936
 937 /*
 938  *  Linux select queue depths function
 939  */
 940 #define DEF_DEPTH       (sym_driver_setup.max_tag)
 941 #define ALL_TARGETS     -2
 942 #define NO_TARGET       -1
 943 #define ALL_LUNS        -2
 944 #define NO_LUN          -1
 945
 946 static int device_queue_depth(struct sym_hcb *np, int target, int lun)
 947 {
 948         int c, h, t, u, v;
 949         char *p = sym_driver_setup.tag_ctrl;
 950         char *ep;
 951
 952         h = -1;
 953         t = NO_TARGET;
 954         u = NO_LUN;
 955         while ((c = *p++) != 0) {
 956                 v = simple_strtoul(p, &ep, 0);
 957                 switch(c) {
 958                 case '/':
 959                         ++h;
 960                         t = ALL_TARGETS;
 961                         u = ALL_LUNS;
 962                         break;
 963                 case 't':
 964                         if (t != target)
 965                                 t = (target == v) ? v : NO_TARGET;
 966                         u = ALL_LUNS;
 967                         break;
 968                 case 'u':
 969                         if (u != lun)
 970                                 u = (lun == v) ? v : NO_LUN;
 971                         break;
 972                 case 'q':
 973                         if (h == np->s.unit &&
 974                                 (t == ALL_TARGETS || t == target) &&
 975                                 (u == ALL_LUNS    || u == lun))
 976                                 return v;
 977                         break;
 978                 case '-':
 979                         t = ALL_TARGETS;
 980                         u = ALL_LUNS;
 981                         break;
 982                 default:
 983                         break;
 984                 }
 985                 p = ep;
 986         }
 987         return DEF_DEPTH;
 988 }
 989
 990 static int sym53c8xx_slave_alloc(struct scsi_device *device)
 991 {
 992         struct sym_hcb *np = sym_get_hcb(device->host);
 993         struct sym_tcb *tp = &np->target[device->id];
 994         if (!tp->sdev)
 995                 tp->sdev = device;
 996
 997         return 0;
 998 }
 999
1000 static void sym53c8xx_slave_destroy(struct scsi_device *device)
1001 {
1002         struct sym_hcb *np = sym_get_hcb(device->host);
1003         struct sym_tcb *tp = &np->target[device->id];
1004         if (tp->sdev == device)
1005                 tp->sdev = NULL;
1006 }
1007
1008 /*
1009  * Linux entry point for device queue sizing.
1010  */
1011 static int sym53c8xx_slave_configure(struct scsi_device *device)
1012 {
1013         struct sym_hcb *np = sym_get_hcb(device->host);
1014         struct sym_tcb *tp = &np->target[device->id];
1015         struct sym_lcb *lp;
1016         int reqtags, depth_to_use;
1017
1018         /*
1019          *  Allocate the LCB if not yet.
1020          *  If it fail, we may well be in the sh*t. :)
1021          */
1022         lp = sym_alloc_lcb(np, device->id, device->lun);
1023         if (!lp)
1024                 return -ENOMEM;
1025
1026         /*
1027          *  Get user flags.
1028          */
1029         lp->curr_flags = lp->user_flags;
1030
1031         /*
1032          *  Select queue depth from driver setup.
1033          *  Donnot use more than configured by user.
1034          *  Use at least 2.
1035          *  Donnot use more than our maximum.
1036          */
1037         reqtags = device_queue_depth(np, device->id, device->lun);
1038         if (reqtags > tp->usrtags)
1039                 reqtags = tp->usrtags;
1040         if (!device->tagged_supported)
1041                 reqtags = 0;
1042 #if 1 /* Avoid to locally queue commands for no good reasons */
1043         if (reqtags > SYM_CONF_MAX_TAG)
1044                 reqtags = SYM_CONF_MAX_TAG;
1045         depth_to_use = (reqtags ? reqtags : 2);
1046 #else
1047         depth_to_use = (reqtags ? SYM_CONF_MAX_TAG : 2);
1048 #endif
1049         scsi_adjust_queue_depth(device,
1050                                 (device->tagged_supported ?
1051                                  MSG_SIMPLE_TAG : 0),
1052                                 depth_to_use);
1053         lp->s.scdev_depth = depth_to_use;
1054         sym_tune_dev_queuing(tp, device->lun, reqtags);
1055
1056         if (!spi_initial_dv(device->sdev_target))
1057                 spi_dv_device(device);
1058
1059         return 0;
1060 }
1061
1062 /*
1063  *  Linux entry point for info() function
1064  */
1065 static const char *sym53c8xx_info (struct Scsi_Host *host)
1066 {
1067         return SYM_DRIVER_NAME;
1068 }
1069
1070
1071 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1072 /*
1073  *  Proc file system stuff
1074  *
1075  *  A read operation returns adapter information.
1076  *  A write operation is a control command.
1077  *  The string is parsed in the driver code and the command is passed
1078  *  to the sym_usercmd() function.
1079  */
1080
1081 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1082
1083 struct  sym_usrcmd {
1084         u_long  target;
1085         u_long  lun;
1086         u_long  data;
1087         u_long  cmd;
1088 };
1089
1090 #define UC_SETSYNC      10
1091 #define UC_SETTAGS      11
1092 #define UC_SETDEBUG     12
1093 #define UC_SETWIDE      14
1094 #define UC_SETFLAG      15
1095 #define UC_SETVERBOSE   17
1096 #define UC_RESETDEV     18
1097 #define UC_CLEARDEV     19
1098
1099 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
1100 {
1101         struct sym_tcb *tp;
1102         int t, l;
1103
1104         switch (uc->cmd) {
1105         case 0: return;
1106
1107 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1108         case UC_SETDEBUG:
1109                 sym_debug_flags = uc->data;
1110                 break;
1111 #endif
1112         case UC_SETVERBOSE:
1113                 np->verbose = uc->data;
1114                 break;
1115         default:
1116                 /*
1117                  * We assume that other commands apply to targets.
1118                  * This should always be the case and avoid the below
1119                  * 4 lines to be repeated 6 times.
1120                  */
1121                 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
1122                         if (!((uc->target >> t) & 1))
1123                                 continue;
1124                         tp = &np->target[t];
1125
1126                         switch (uc->cmd) {
1127
1128                         case UC_SETSYNC:
1129                                 if (!uc->data || uc->data >= 255) {
1130                                         tp->tgoal.iu = tp->tgoal.dt =
1131                                                 tp->tgoal.qas = 0;
1132                                         tp->tgoal.offset = 0;
1133                                 } else if (uc->data <= 9 && np->minsync_dt) {
1134                                         if (uc->data < np->minsync_dt)
1135                                                 uc->data = np->minsync_dt;
1136                                         tp->tgoal.iu = tp->tgoal.dt =
1137                                                 tp->tgoal.qas = 1;
1138                                         tp->tgoal.width = 1;
1139                                         tp->tgoal.period = uc->data;
1140                                         tp->tgoal.offset = np->maxoffs_dt;
1141                                 } else {
1142                                         if (uc->data < np->minsync)
1143                                                 uc->data = np->minsync;
1144                                         tp->tgoal.iu = tp->tgoal.dt =
1145                                                 tp->tgoal.qas = 0;
1146                                         tp->tgoal.period = uc->data;
1147                                         tp->tgoal.offset = np->maxoffs;
1148                                 }
1149                                 tp->tgoal.check_nego = 1;
1150                                 break;
1151                         case UC_SETWIDE:
1152                                 tp->tgoal.width = uc->data ? 1 : 0;
1153                                 tp->tgoal.check_nego = 1;
1154                                 break;
1155                         case UC_SETTAGS:
1156                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
1157                                         sym_tune_dev_queuing(tp, l, uc->data);
1158                                 break;
1159                         case UC_RESETDEV:
1160                                 tp->to_reset = 1;
1161                                 np->istat_sem = SEM;
1162                                 OUTB(np, nc_istat, SIGP|SEM);
1163                                 break;
1164                         case UC_CLEARDEV:
1165                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
1166                                         struct sym_lcb *lp = sym_lp(tp, l);
1167                                         if (lp) lp->to_clear = 1;
1168                                 }
1169                                 np->istat_sem = SEM;
1170                                 OUTB(np, nc_istat, SIGP|SEM);
1171                                 break;
1172                         case UC_SETFLAG:
1173                                 tp->usrflags = uc->data;
1174                                 break;
1175                         }
1176                 }
1177                 break;
1178         }
1179 }
1180
1181 static int skip_spaces(char *ptr, int len)
1182 {
1183         int cnt, c;
1184
1185         for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
1186
1187         return (len - cnt);
1188 }
1189
1190 static int get_int_arg(char *ptr, int len, u_long *pv)
1191 {
1192         char *end;
1193
1194         *pv = simple_strtoul(ptr, &end, 10);
1195         return (end - ptr);
1196 }
1197
1198 static int is_keyword(char *ptr, int len, char *verb)
1199 {
1200         int verb_len = strlen(verb);
1201
1202         if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1203                 return verb_len;
1204         else
1205                 return 0;
1206 }
1207
1208 #define SKIP_SPACES(ptr, len)                                           \
1209         if ((arg_len = skip_spaces(ptr, len)) < 1)                      \
1210                 return -EINVAL;                                         \
1211         ptr += arg_len; len -= arg_len;
1212
1213 #define GET_INT_ARG(ptr, len, v)                                        \
1214         if (!(arg_len = get_int_arg(ptr, len, &(v))))                   \
1215                 return -EINVAL;                                         \
1216         ptr += arg_len; len -= arg_len;
1217
1218
1219 /*
1220  * Parse a control command
1221  */
1222
1223 static int sym_user_command(struct sym_hcb *np, char *buffer, int length)
1224 {
1225         char *ptr       = buffer;
1226         int len         = length;
1227         struct sym_usrcmd cmd, *uc = &cmd;
1228         int             arg_len;
1229         u_long          target;
1230
1231         memset(uc, 0, sizeof(*uc));
1232
1233         if (len > 0 && ptr[len-1] == '\n')
1234                 --len;
1235
1236         if      ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1237                 uc->cmd = UC_SETSYNC;
1238         else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1239                 uc->cmd = UC_SETTAGS;
1240         else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1241                 uc->cmd = UC_SETVERBOSE;
1242         else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1243                 uc->cmd = UC_SETWIDE;
1244 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1245         else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1246                 uc->cmd = UC_SETDEBUG;
1247 #endif
1248         else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1249                 uc->cmd = UC_SETFLAG;
1250         else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1251                 uc->cmd = UC_RESETDEV;
1252         else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1253                 uc->cmd = UC_CLEARDEV;
1254         else
1255                 arg_len = 0;
1256
1257 #ifdef DEBUG_PROC_INFO
1258 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1259 #endif
1260
1261         if (!arg_len)
1262                 return -EINVAL;
1263         ptr += arg_len; len -= arg_len;
1264
1265         switch(uc->cmd) {
1266         case UC_SETSYNC:
1267         case UC_SETTAGS:
1268         case UC_SETWIDE:
1269         case UC_SETFLAG:
1270         case UC_RESETDEV:
1271         case UC_CLEARDEV:
1272                 SKIP_SPACES(ptr, len);
1273                 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1274                         ptr += arg_len; len -= arg_len;
1275                         uc->target = ~0;
1276                 } else {
1277                         GET_INT_ARG(ptr, len, target);
1278                         uc->target = (1<<target);
1279 #ifdef DEBUG_PROC_INFO
1280 printk("sym_user_command: target=%ld\n", target);
1281 #endif
1282                 }
1283                 break;
1284         }
1285
1286         switch(uc->cmd) {
1287         case UC_SETVERBOSE:
1288         case UC_SETSYNC:
1289         case UC_SETTAGS:
1290         case UC_SETWIDE:
1291                 SKIP_SPACES(ptr, len);
1292                 GET_INT_ARG(ptr, len, uc->data);
1293 #ifdef DEBUG_PROC_INFO
1294 printk("sym_user_command: data=%ld\n", uc->data);
1295 #endif
1296                 break;
1297 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1298         case UC_SETDEBUG:
1299                 while (len > 0) {
1300                         SKIP_SPACES(ptr, len);
1301                         if      ((arg_len = is_keyword(ptr, len, "alloc")))
1302                                 uc->data |= DEBUG_ALLOC;
1303                         else if ((arg_len = is_keyword(ptr, len, "phase")))
1304                                 uc->data |= DEBUG_PHASE;
1305                         else if ((arg_len = is_keyword(ptr, len, "queue")))
1306                                 uc->data |= DEBUG_QUEUE;
1307                         else if ((arg_len = is_keyword(ptr, len, "result")))
1308                                 uc->data |= DEBUG_RESULT;
1309                         else if ((arg_len = is_keyword(ptr, len, "scatter")))
1310                                 uc->data |= DEBUG_SCATTER;
1311                         else if ((arg_len = is_keyword(ptr, len, "script")))
1312                                 uc->data |= DEBUG_SCRIPT;
1313                         else if ((arg_len = is_keyword(ptr, len, "tiny")))
1314                                 uc->data |= DEBUG_TINY;
1315                         else if ((arg_len = is_keyword(ptr, len, "timing")))
1316                                 uc->data |= DEBUG_TIMING;
1317                         else if ((arg_len = is_keyword(ptr, len, "nego")))
1318                                 uc->data |= DEBUG_NEGO;
1319                         else if ((arg_len = is_keyword(ptr, len, "tags")))
1320                                 uc->data |= DEBUG_TAGS;
1321                         else if ((arg_len = is_keyword(ptr, len, "pointer")))
1322                                 uc->data |= DEBUG_POINTER;
1323                         else
1324                                 return -EINVAL;
1325                         ptr += arg_len; len -= arg_len;
1326                 }
1327 #ifdef DEBUG_PROC_INFO
1328 printk("sym_user_command: data=%ld\n", uc->data);
1329 #endif
1330                 break;
1331 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1332         case UC_SETFLAG:
1333                 while (len > 0) {
1334                         SKIP_SPACES(ptr, len);
1335                         if      ((arg_len = is_keyword(ptr, len, "no_disc")))
1336                                 uc->data &= ~SYM_DISC_ENABLED;
1337                         else
1338                                 return -EINVAL;
1339                         ptr += arg_len; len -= arg_len;
1340                 }
1341                 break;
1342         default:
1343                 break;
1344         }
1345
1346         if (len)
1347                 return -EINVAL;
1348         else {
1349                 unsigned long flags;
1350
1351                 spin_lock_irqsave(np->s.host->host_lock, flags);
1352                 sym_exec_user_command (np, uc);
1353                 spin_unlock_irqrestore(np->s.host->host_lock, flags);
1354         }
1355         return length;
1356 }
1357
1358 #endif  /* SYM_LINUX_USER_COMMAND_SUPPORT */
1359
1360
1361 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1362 /*
1363  *  Informations through the proc file system.
1364  */
1365 struct info_str {
1366         char *buffer;
1367         int length;
1368         int offset;
1369         int pos;
1370 };
1371
1372 static void copy_mem_info(struct info_str *info, char *data, int len)
1373 {
1374         if (info->pos + len > info->length)
1375                 len = info->length - info->pos;
1376
1377         if (info->pos + len < info->offset) {
1378                 info->pos += len;
1379                 return;
1380         }
1381         if (info->pos < info->offset) {
1382                 data += (info->offset - info->pos);
1383                 len  -= (info->offset - info->pos);
1384         }
1385
1386         if (len > 0) {
1387                 memcpy(info->buffer + info->pos, data, len);
1388                 info->pos += len;
1389         }
1390 }
1391
1392 static int copy_info(struct info_str *info, char *fmt, ...)
1393 {
1394         va_list args;
1395         char buf[81];
1396         int len;
1397
1398         va_start(args, fmt);
1399         len = vsprintf(buf, fmt, args);
1400         va_end(args);
1401
1402         copy_mem_info(info, buf, len);
1403         return len;
1404 }
1405
1406 /*
1407  *  Copy formatted information into the input buffer.
1408  */
1409 static int sym_host_info(struct sym_hcb *np, char *ptr, off_t offset, int len)
1410 {
1411         struct info_str info;
1412
1413         info.buffer     = ptr;
1414         info.length     = len;
1415         info.offset     = offset;
1416         info.pos        = 0;
1417
1418         copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1419                          "revision id 0x%x\n",
1420                          np->s.chip_name, np->device_id, np->revision_id);
1421         copy_info(&info, "At PCI address %s, IRQ " IRQ_FMT "\n",
1422                 pci_name(np->s.device), IRQ_PRM(np->s.irq));
1423         copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1424                          (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1425                          np->maxwide ? "Wide" : "Narrow",
1426                          np->minsync_dt ? ", DT capable" : "");
1427
1428         copy_info(&info, "Max. started commands %d, "
1429                          "max. commands per LUN %d\n",
1430                          SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1431
1432         return info.pos > info.offset? info.pos - info.offset : 0;
1433 }
1434 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1435
1436 /*
1437  *  Entry point of the scsi proc fs of the driver.
1438  *  - func = 0 means read  (returns adapter infos)
1439  *  - func = 1 means write (not yet merget from sym53c8xx)
1440  */
1441 static int sym53c8xx_proc_info(struct Scsi_Host *host, char *buffer,
1442                         char **start, off_t offset, int length, int func)
1443 {
1444         struct sym_hcb *np = sym_get_hcb(host);
1445         int retv;
1446
1447         if (func) {
1448 #ifdef  SYM_LINUX_USER_COMMAND_SUPPORT
1449                 retv = sym_user_command(np, buffer, length);
1450 #else
1451                 retv = -EINVAL;
1452 #endif
1453         } else {
1454                 if (start)
1455                         *start = buffer;
1456 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1457                 retv = sym_host_info(np, buffer, offset, length);
1458 #else
1459                 retv = -EINVAL;
1460 #endif
1461         }
1462
1463         return retv;
1464 }
1465 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1466
1467 /*
1468  *      Free controller resources.
1469  */
1470 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev)
1471 {
1472         /*
1473          *  Free O/S specific resources.
1474          */
1475         if (np->s.irq)
1476                 free_irq(np->s.irq, np);
1477         if (np->s.ioaddr)
1478                 pci_iounmap(pdev, np->s.ioaddr);
1479         if (np->s.ramaddr)
1480                 pci_iounmap(pdev, np->s.ramaddr);
1481         /*
1482          *  Free O/S independent resources.
1483          */
1484         sym_hcb_free(np);
1485
1486         sym_mfree_dma(np, sizeof(*np), "HCB");
1487 }
1488
1489 /*
1490  *  Ask/tell the system about DMA addressing.
1491  */
1492 static int sym_setup_bus_dma_mask(struct sym_hcb *np)
1493 {
1494 #if SYM_CONF_DMA_ADDRESSING_MODE > 0
1495 #if   SYM_CONF_DMA_ADDRESSING_MODE == 1
1496 #define DMA_DAC_MASK    0x000000ffffffffffULL /* 40-bit */
1497 #elif SYM_CONF_DMA_ADDRESSING_MODE == 2
1498 #define DMA_DAC_MASK    DMA_64BIT_MASK
1499 #endif
1500         if ((np->features & FE_DAC) &&
1501                         !pci_set_dma_mask(np->s.device, DMA_DAC_MASK)) {
1502                 np->use_dac = 1;
1503                 return 0;
1504         }
1505 #endif
1506
1507         if (!pci_set_dma_mask(np->s.device, DMA_32BIT_MASK))
1508                 return 0;
1509
1510         printf_warning("%s: No suitable DMA available\n", sym_name(np));
1511         return -1;
1512 }
1513
1514 /*
1515  *  Host attach and initialisations.
1516  *
1517  *  Allocate host data and ncb structure.
1518  *  Remap MMIO region.
1519  *  Do chip initialization.
1520  *  If all is OK, install interrupt handling and
1521  *  start the timer daemon.
1522  */
1523 static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1524                 int unit, struct sym_device *dev)
1525 {
1526         struct host_data *host_data;
1527         struct sym_hcb *np = NULL;
1528         struct Scsi_Host *instance = NULL;
1529         struct pci_dev *pdev = dev->pdev;
1530         unsigned long flags;
1531         struct sym_fw *fw;
1532
1533         printk(KERN_INFO
1534                 "sym%d: <%s> rev 0x%x at pci %s irq " IRQ_FMT "\n",
1535                 unit, dev->chip.name, dev->chip.revision_id,
1536                 pci_name(pdev), IRQ_PRM(pdev->irq));
1537
1538         /*
1539          *  Get the firmware for this chip.
1540          */
1541         fw = sym_find_firmware(&dev->chip);
1542         if (!fw)
1543                 goto attach_failed;
1544
1545         /*
1546          *      Allocate host_data structure
1547          */
1548         instance = scsi_host_alloc(tpnt, sizeof(*host_data));
1549         if (!instance)
1550                 goto attach_failed;
1551         host_data = (struct host_data *) instance->hostdata;
1552
1553         /*
1554          *  Allocate immediately the host control block,
1555          *  since we are only expecting to succeed. :)
1556          *  We keep track in the HCB of all the resources that
1557          *  are to be released on error.
1558          */
1559         np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1560         if (!np)
1561                 goto attach_failed;
1562         np->s.device = pdev;
1563         np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1564         host_data->ncb = np;
1565         np->s.host = instance;
1566
1567         pci_set_drvdata(pdev, np);
1568
1569         /*
1570          *  Copy some useful infos to the HCB.
1571          */
1572         np->hcb_ba      = vtobus(np);
1573         np->verbose     = sym_driver_setup.verbose;
1574         np->s.device    = pdev;
1575         np->s.unit      = unit;
1576         np->device_id   = dev->chip.device_id;
1577         np->revision_id = dev->chip.revision_id;
1578         np->features    = dev->chip.features;
1579         np->clock_divn  = dev->chip.nr_divisor;
1580         np->maxoffs     = dev->chip.offset_max;
1581         np->maxburst    = dev->chip.burst_max;
1582         np->myaddr      = dev->host_id;
1583
1584         /*
1585          *  Edit its name.
1586          */
1587         strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1588         sprintf(np->s.inst_name, "sym%d", np->s.unit);
1589
1590         if (sym_setup_bus_dma_mask(np))
1591                 goto attach_failed;
1592
1593         /*
1594          *  Try to map the controller chip to
1595          *  virtual and physical memory.
1596          */
1597         np->mmio_ba = (u32)dev->mmio_base;
1598         np->s.ioaddr    = dev->s.ioaddr;
1599         np->s.ramaddr   = dev->s.ramaddr;
1600         np->s.io_ws = (np->features & FE_IO256) ? 256 : 128;
1601
1602         /*
1603          *  Map on-chip RAM if present and supported.
1604          */
1605         if (!(np->features & FE_RAM))
1606                 dev->ram_base = 0;
1607         if (dev->ram_base) {
1608                 np->ram_ba = (u32)dev->ram_base;
1609                 np->ram_ws = (np->features & FE_RAM8K) ? 8192 : 4096;
1610         }
1611
1612         if (sym_hcb_attach(instance, fw, dev->nvram))
1613                 goto attach_failed;
1614
1615         /*
1616          *  Install the interrupt handler.
1617          *  If we synchonize the C code with SCRIPTS on interrupt,
1618          *  we do not want to share the INTR line at all.
1619          */
1620         if (request_irq(pdev->irq, sym53c8xx_intr, SA_SHIRQ, NAME53C8XX, np)) {
1621                 printf_err("%s: request irq %d failure\n",
1622                         sym_name(np), pdev->irq);
1623                 goto attach_failed;
1624         }
1625         np->s.irq = pdev->irq;
1626
1627         /*
1628          *  After SCSI devices have been opened, we cannot
1629          *  reset the bus safely, so we do it here.
1630          */
1631         spin_lock_irqsave(instance->host_lock, flags);
1632         if (sym_reset_scsi_bus(np, 0))
1633                 goto reset_failed;
1634
1635         /*
1636          *  Start the SCRIPTS.
1637          */
1638         sym_start_up (np, 1);
1639
1640         /*
1641          *  Start the timer daemon
1642          */
1643         init_timer(&np->s.timer);
1644         np->s.timer.data     = (unsigned long) np;
1645         np->s.timer.function = sym53c8xx_timer;
1646         np->s.lasttime=0;
1647         sym_timer (np);
1648
1649         /*
1650          *  Fill Linux host instance structure
1651          *  and return success.
1652          */
1653         instance->max_channel   = 0;
1654         instance->this_id       = np->myaddr;
1655         instance->max_id        = np->maxwide ? 16 : 8;
1656         instance->max_lun       = SYM_CONF_MAX_LUN;
1657         instance->unique_id     = pci_resource_start(pdev, 0);
1658         instance->cmd_per_lun   = SYM_CONF_MAX_TAG;
1659         instance->can_queue     = (SYM_CONF_MAX_START-2);
1660         instance->sg_tablesize  = SYM_CONF_MAX_SG;
1661         instance->max_cmd_len   = 16;
1662         BUG_ON(sym2_transport_template == NULL);
1663         instance->transportt    = sym2_transport_template;
1664
1665         spin_unlock_irqrestore(instance->host_lock, flags);
1666
1667         return instance;
1668
1669  reset_failed:
1670         printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1671                    "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1672         spin_unlock_irqrestore(instance->host_lock, flags);
1673  attach_failed:
1674         if (!instance)
1675                 return NULL;
1676         printf_info("%s: giving up ...\n", sym_name(np));
1677         if (np)
1678                 sym_free_resources(np, pdev);
1679         scsi_host_put(instance);
1680
1681         return NULL;
1682  }
1683
1684
1685 /*
1686  *    Detect and try to read SYMBIOS and TEKRAM NVRAM.
1687  */
1688 #if SYM_CONF_NVRAM_SUPPORT
1689 static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1690 {
1691         devp->nvram = nvp;
1692         devp->device_id = devp->chip.device_id;
1693         nvp->type = 0;
1694
1695         sym_read_nvram(devp, nvp);
1696 }
1697 #else
1698 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1699 {
1700 }
1701 #endif  /* SYM_CONF_NVRAM_SUPPORT */
1702
1703 static int __devinit sym_check_supported(struct sym_device *device)
1704 {
1705         struct sym_chip *chip;
1706         struct pci_dev *pdev = device->pdev;
1707         u_char revision;
1708         unsigned long io_port = pci_resource_start(pdev, 0);
1709         int i;
1710
1711         /*
1712          *  If user excluded this chip, do not initialize it.
1713          *  I hate this code so much.  Must kill it.
1714          */
1715         if (io_port) {
1716                 for (i = 0 ; i < 8 ; i++) {
1717                         if (sym_driver_setup.excludes[i] == io_port)
1718                                 return -ENODEV;
1719                 }
1720         }
1721
1722         /*
1723          * Check if the chip is supported.  Then copy the chip description
1724          * to our device structure so we can make it match the actual device
1725          * and options.
1726          */
1727         pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
1728         chip = sym_lookup_chip_table(pdev->device, revision);
1729         if (!chip) {
1730                 dev_info(&pdev->dev, "device not supported\n");
1731                 return -ENODEV;
1732         }
1733         memcpy(&device->chip, chip, sizeof(device->chip));
1734         device->chip.revision_id = revision;
1735
1736         return 0;
1737 }
1738
1739 /*
1740  * Ignore Symbios chips controlled by various RAID controllers.
1741  * These controllers set value 0x52414944 at RAM end - 16.
1742  */
1743 static int __devinit sym_check_raid(struct sym_device *device)
1744 {
1745         unsigned int ram_size, ram_val;
1746
1747         if (!device->s.ramaddr)
1748                 return 0;
1749
1750         if (device->chip.features & FE_RAM8K)
1751                 ram_size = 8192;
1752         else
1753                 ram_size = 4096;
1754
1755         ram_val = readl(device->s.ramaddr + ram_size - 16);
1756         if (ram_val != 0x52414944)
1757                 return 0;
1758
1759         dev_info(&device->pdev->dev,
1760                         "not initializing, driven by RAID controller.\n");
1761         return -ENODEV;
1762 }
1763
1764 static int __devinit sym_set_workarounds(struct sym_device *device)
1765 {
1766         struct sym_chip *chip = &device->chip;
1767         struct pci_dev *pdev = device->pdev;
1768         u_short status_reg;
1769
1770         /*
1771          *  (ITEM 12 of a DEL about the 896 I haven't yet).
1772          *  We must ensure the chip will use WRITE AND INVALIDATE.
1773          *  The revision number limit is for now arbitrary.
1774          */
1775         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && chip->revision_id < 0x4) {
1776                 chip->features  |= (FE_WRIE | FE_CLSE);
1777         }
1778
1779         /* If the chip can do Memory Write Invalidate, enable it */
1780         if (chip->features & FE_WRIE) {
1781                 if (pci_set_mwi(pdev))
1782                         return -ENODEV;
1783         }
1784
1785         /*
1786          *  Work around for errant bit in 895A. The 66Mhz
1787          *  capable bit is set erroneously. Clear this bit.
1788          *  (Item 1 DEL 533)
1789          *
1790          *  Make sure Config space and Features agree.
1791          *
1792          *  Recall: writes are not normal to status register -
1793          *  write a 1 to clear and a 0 to leave unchanged.
1794          *  Can only reset bits.
1795          */
1796         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1797         if (chip->features & FE_66MHZ) {
1798                 if (!(status_reg & PCI_STATUS_66MHZ))
1799                         chip->features &= ~FE_66MHZ;
1800         } else {
1801                 if (status_reg & PCI_STATUS_66MHZ) {
1802                         status_reg = PCI_STATUS_66MHZ;
1803                         pci_write_config_word(pdev, PCI_STATUS, status_reg);
1804                         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1805                 }
1806         }
1807
1808         return 0;
1809 }
1810
1811 /*
1812  *  Read and check the PCI configuration for any detected NCR
1813  *  boards and save data for attaching after all boards have
1814  *  been detected.
1815  */
1816 static void __devinit
1817 sym_init_device(struct pci_dev *pdev, struct sym_device *device)
1818 {
1819         int i;
1820
1821         device->host_id = SYM_SETUP_HOST_ID;
1822         device->pdev = pdev;
1823
1824         i = pci_get_base_address(pdev, 1, &device->mmio_base);
1825         pci_get_base_address(pdev, i, &device->ram_base);
1826
1827 #ifndef CONFIG_SCSI_SYM53C8XX_IOMAPPED
1828         if (device->mmio_base)
1829                 device->s.ioaddr = pci_iomap(pdev, 1,
1830                                                 pci_resource_len(pdev, 1));
1831 #endif
1832         if (!device->s.ioaddr)
1833                 device->s.ioaddr = pci_iomap(pdev, 0,
1834                                                 pci_resource_len(pdev, 0));
1835         if (device->ram_base)
1836                 device->s.ramaddr = pci_iomap(pdev, i,
1837                                                 pci_resource_len(pdev, i));
1838 }
1839
1840 /*
1841  * The NCR PQS and PDS cards are constructed as a DEC bridge
1842  * behind which sits a proprietary NCR memory controller and
1843  * either four or two 53c875s as separate devices.  We can tell
1844  * if an 875 is part of a PQS/PDS or not since if it is, it will
1845  * be on the same bus as the memory controller.  In its usual
1846  * mode of operation, the 875s are slaved to the memory
1847  * controller for all transfers.  To operate with the Linux
1848  * driver, the memory controller is disabled and the 875s
1849  * freed to function independently.  The only wrinkle is that
1850  * the preset SCSI ID (which may be zero) must be read in from
1851  * a special configuration space register of the 875.
1852  */
1853 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1854 {
1855         int slot;
1856         u8 tmp;
1857
1858         for (slot = 0; slot < 256; slot++) {
1859                 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1860
1861                 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1862                         pci_dev_put(memc);
1863                         continue;
1864                 }
1865
1866                 /* bit 1: allow individual 875 configuration */
1867                 pci_read_config_byte(memc, 0x44, &tmp);
1868                 if ((tmp & 0x2) == 0) {
1869                         tmp |= 0x2;
1870                         pci_write_config_byte(memc, 0x44, tmp);
1871                 }
1872
1873                 /* bit 2: drive individual 875 interrupts to the bus */
1874                 pci_read_config_byte(memc, 0x45, &tmp);
1875                 if ((tmp & 0x4) == 0) {
1876                         tmp |= 0x4;
1877                         pci_write_config_byte(memc, 0x45, tmp);
1878                 }
1879
1880                 pci_dev_put(memc);
1881                 break;
1882         }
1883
1884         pci_read_config_byte(pdev, 0x84, &tmp);
1885         sym_dev->host_id = tmp;
1886 }
1887
1888 /*
1889  *  Called before unloading the module.
1890  *  Detach the host.
1891  *  We have to free resources and halt the NCR chip.
1892  */
1893 static int sym_detach(struct sym_hcb *np, struct pci_dev *pdev)
1894 {
1895         printk("%s: detaching ...\n", sym_name(np));
1896
1897         del_timer_sync(&np->s.timer);
1898
1899         /*
1900          * Reset NCR chip.
1901          * We should use sym_soft_reset(), but we don't want to do
1902          * so, since we may not be safe if interrupts occur.
1903          */
1904         printk("%s: resetting chip\n", sym_name(np));
1905         OUTB(np, nc_istat, SRST);
1906         udelay(10);
1907         OUTB(np, nc_istat, 0);
1908
1909         sym_free_resources(np, pdev);
1910
1911         return 1;
1912 }
1913
1914 /*
1915  * Driver host template.
1916  */
1917 static struct scsi_host_template sym2_template = {
1918         .module                 = THIS_MODULE,
1919         .name                   = "sym53c8xx",
1920         .info                   = sym53c8xx_info,
1921         .queuecommand           = sym53c8xx_queue_command,
1922         .slave_alloc            = sym53c8xx_slave_alloc,
1923         .slave_configure        = sym53c8xx_slave_configure,
1924         .slave_destroy          = sym53c8xx_slave_destroy,
1925         .eh_abort_handler       = sym53c8xx_eh_abort_handler,
1926         .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1927         .eh_bus_reset_handler   = sym53c8xx_eh_bus_reset_handler,
1928         .eh_host_reset_handler  = sym53c8xx_eh_host_reset_handler,
1929         .this_id                = 7,
1930         .use_clustering         = DISABLE_CLUSTERING,
1931 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1932         .proc_info              = sym53c8xx_proc_info,
1933         .proc_name              = NAME53C8XX,
1934 #endif
1935 };
1936
1937 static int attach_count;
1938
1939 static int __devinit sym2_probe(struct pci_dev *pdev,
1940                                 const struct pci_device_id *ent)
1941 {
1942         struct sym_device sym_dev;
1943         struct sym_nvram nvram;
1944         struct Scsi_Host *instance;
1945
1946         memset(&sym_dev, 0, sizeof(sym_dev));
1947         memset(&nvram, 0, sizeof(nvram));
1948
1949         if (pci_enable_device(pdev))
1950                 goto leave;
1951
1952         pci_set_master(pdev);
1953
1954         if (pci_request_regions(pdev, NAME53C8XX))
1955                 goto disable;
1956
1957         sym_init_device(pdev, &sym_dev);
1958         if (sym_check_supported(&sym_dev))
1959                 goto free;
1960
1961         if (sym_check_raid(&sym_dev))
1962                 goto leave;     /* Don't disable the device */
1963
1964         if (sym_set_workarounds(&sym_dev))
1965                 goto free;
1966
1967         sym_config_pqs(pdev, &sym_dev);
1968
1969         sym_get_nvram(&sym_dev, &nvram);
1970
1971         instance = sym_attach(&sym2_template, attach_count, &sym_dev);
1972         if (!instance)
1973                 goto free;
1974
1975         if (scsi_add_host(instance, &pdev->dev))
1976                 goto detach;
1977         scsi_scan_host(instance);
1978
1979         attach_count++;
1980
1981         return 0;
1982
1983  detach:
1984         sym_detach(pci_get_drvdata(pdev), pdev);
1985  free:
1986         pci_release_regions(pdev);
1987  disable:
1988         pci_disable_device(pdev);
1989  leave:
1990         return -ENODEV;
1991 }
1992
1993 static void __devexit sym2_remove(struct pci_dev *pdev)
1994 {
1995         struct sym_hcb *np = pci_get_drvdata(pdev);
1996         struct Scsi_Host *host = np->s.host;
1997
1998         scsi_remove_host(host);
1999         scsi_host_put(host);
2000
2001         sym_detach(np, pdev);
2002
2003         pci_release_regions(pdev);
2004         pci_disable_device(pdev);
2005
2006         attach_count--;
2007 }
2008
2009 static void sym2_get_signalling(struct Scsi_Host *shost)
2010 {
2011         struct sym_hcb *np = sym_get_hcb(shost);
2012         enum spi_signal_type type;
2013
2014         switch (np->scsi_mode) {
2015         case SMODE_SE:
2016                 type = SPI_SIGNAL_SE;
2017                 break;
2018         case SMODE_LVD:
2019                 type = SPI_SIGNAL_LVD;
2020                 break;
2021         case SMODE_HVD:
2022                 type = SPI_SIGNAL_HVD;
2023                 break;
2024         default:
2025                 type = SPI_SIGNAL_UNKNOWN;
2026                 break;
2027         }
2028         spi_signalling(shost) = type;
2029 }
2030
2031 static void sym2_set_offset(struct scsi_target *starget, int offset)
2032 {
2033         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2034         struct sym_hcb *np = sym_get_hcb(shost);
2035         struct sym_tcb *tp = &np->target[starget->id];
2036
2037         tp->tgoal.offset = offset;
2038         tp->tgoal.check_nego = 1;
2039 }
2040
2041 static void sym2_set_period(struct scsi_target *starget, int period)
2042 {
2043         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2044         struct sym_hcb *np = sym_get_hcb(shost);
2045         struct sym_tcb *tp = &np->target[starget->id];
2046
2047         /* have to have DT for these transfers */
2048         if (period <= np->minsync)
2049                 tp->tgoal.dt = 1;
2050
2051         tp->tgoal.period = period;
2052         tp->tgoal.check_nego = 1;
2053 }
2054
2055 static void sym2_set_width(struct scsi_target *starget, int width)
2056 {
2057         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2058         struct sym_hcb *np = sym_get_hcb(shost);
2059         struct sym_tcb *tp = &np->target[starget->id];
2060
2061         /* It is illegal to have DT set on narrow transfers.  If DT is
2062          * clear, we must also clear IU and QAS.  */
2063         if (width == 0)
2064                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2065
2066         tp->tgoal.width = width;
2067         tp->tgoal.check_nego = 1;
2068 }
2069
2070 static void sym2_set_dt(struct scsi_target *starget, int dt)
2071 {
2072         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2073         struct sym_hcb *np = sym_get_hcb(shost);
2074         struct sym_tcb *tp = &np->target[starget->id];
2075
2076         /* We must clear QAS and IU if DT is clear */
2077         if (dt)
2078                 tp->tgoal.dt = 1;
2079         else
2080                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2081         tp->tgoal.check_nego = 1;
2082 }
2083
2084 static void sym2_set_iu(struct scsi_target *starget, int iu)
2085 {
2086         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2087         struct sym_hcb *np = sym_get_hcb(shost);
2088         struct sym_tcb *tp = &np->target[starget->id];
2089
2090         if (iu)
2091                 tp->tgoal.iu = tp->tgoal.dt = 1;
2092         else
2093                 tp->tgoal.iu = 0;
2094         tp->tgoal.check_nego = 1;
2095 }
2096
2097 static void sym2_set_qas(struct scsi_target *starget, int qas)
2098 {
2099         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2100         struct sym_hcb *np = sym_get_hcb(shost);
2101         struct sym_tcb *tp = &np->target[starget->id];
2102
2103         if (qas)
2104                 tp->tgoal.dt = tp->tgoal.qas = 1;
2105         else
2106                 tp->tgoal.qas = 0;
2107         tp->tgoal.check_nego = 1;
2108 }
2109
2110
2111 static struct spi_function_template sym2_transport_functions = {
2112         .set_offset     = sym2_set_offset,
2113         .show_offset    = 1,
2114         .set_period     = sym2_set_period,
2115         .show_period    = 1,
2116         .set_width      = sym2_set_width,
2117         .show_width     = 1,
2118         .set_dt         = sym2_set_dt,
2119         .show_dt        = 1,
2120         .set_iu         = sym2_set_iu,
2121         .show_iu        = 1,
2122         .set_qas        = sym2_set_qas,
2123         .show_qas       = 1,
2124         .get_signalling = sym2_get_signalling,
2125 };
2126
2127 static struct pci_device_id sym2_id_table[] __devinitdata = {
2128         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2129           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2130         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2131           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2132         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2133           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2134         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2135           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2136         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2137           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2138         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2139           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2140         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2141           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2142         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2143           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2144         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2145           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2146         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2147           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2148         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2149           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2150         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2151           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2152         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2153           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2154         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2155           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2156         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2157           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2158         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2159           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2160         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2161           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2162         { 0, }
2163 };
2164
2165 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2166
2167 static struct pci_driver sym2_driver = {
2168         .name           = NAME53C8XX,
2169         .id_table       = sym2_id_table,
2170         .probe          = sym2_probe,
2171         .remove         = __devexit_p(sym2_remove),
2172 };
2173
2174 static int __init sym2_init(void)
2175 {
2176         int error;
2177
2178         sym2_setup_params();
2179         sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2180         if (!sym2_transport_template)
2181                 return -ENODEV;
2182
2183         error = pci_register_driver(&sym2_driver);
2184         if (error)
2185                 spi_release_transport(sym2_transport_template);
2186         return error;
2187 }
2188
2189 static void __exit sym2_exit(void)
2190 {
2191         pci_unregister_driver(&sym2_driver);
2192         spi_release_transport(sym2_transport_template);
2193 }
2194
2195 module_init(sym2_init);
2196 module_exit(sym2_exit);