linux/drivers/scsi/sym53c8xx_2/sym_glue.c
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   1/*
   2 * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family 
   3 * of PCI-SCSI IO processors.
   4 *
   5 * Copyright (C) 1999-2001  Gerard Roudier <groudier@free.fr>
   6 * Copyright (c) 2003-2005  Matthew Wilcox <matthew@wil.cx>
   7 *
   8 * This driver is derived from the Linux sym53c8xx driver.
   9 * Copyright (C) 1998-2000  Gerard Roudier
  10 *
  11 * The sym53c8xx driver is derived from the ncr53c8xx driver that had been 
  12 * a port of the FreeBSD ncr driver to Linux-1.2.13.
  13 *
  14 * The original ncr driver has been written for 386bsd and FreeBSD by
  15 *         Wolfgang Stanglmeier        <wolf@cologne.de>
  16 *         Stefan Esser                <se@mi.Uni-Koeln.de>
  17 * Copyright (C) 1994  Wolfgang Stanglmeier
  18 *
  19 * Other major contributions:
  20 *
  21 * NVRAM detection and reading.
  22 * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
  23 *
  24 *-----------------------------------------------------------------------------
  25 *
  26 * This program is free software; you can redistribute it and/or modify
  27 * it under the terms of the GNU General Public License as published by
  28 * the Free Software Foundation; either version 2 of the License, or
  29 * (at your option) any later version.
  30 *
  31 * This program is distributed in the hope that it will be useful,
  32 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  33 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  34 * GNU General Public License for more details.
  35 *
  36 * You should have received a copy of the GNU General Public License
  37 * along with this program; if not, write to the Free Software
  38 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  39 */
  40#include <linux/ctype.h>
  41#include <linux/init.h>
  42#include <linux/module.h>
  43#include <linux/moduleparam.h>
  44#include <linux/spinlock.h>
  45#include <scsi/scsi.h>
  46#include <scsi/scsi_tcq.h>
  47#include <scsi/scsi_device.h>
  48#include <scsi/scsi_transport.h>
  49
  50#include "sym_glue.h"
  51#include "sym_nvram.h"
  52
  53#define NAME53C         "sym53c"
  54#define NAME53C8XX      "sym53c8xx"
  55
  56struct sym_driver_setup sym_driver_setup = SYM_LINUX_DRIVER_SETUP;
  57unsigned int sym_debug_flags = 0;
  58
  59static char *excl_string;
  60static char *safe_string;
  61module_param_named(cmd_per_lun, sym_driver_setup.max_tag, ushort, 0);
  62module_param_named(burst, sym_driver_setup.burst_order, byte, 0);
  63module_param_named(led, sym_driver_setup.scsi_led, byte, 0);
  64module_param_named(diff, sym_driver_setup.scsi_diff, byte, 0);
  65module_param_named(irqm, sym_driver_setup.irq_mode, byte, 0);
  66module_param_named(buschk, sym_driver_setup.scsi_bus_check, byte, 0);
  67module_param_named(hostid, sym_driver_setup.host_id, byte, 0);
  68module_param_named(verb, sym_driver_setup.verbose, byte, 0);
  69module_param_named(debug, sym_debug_flags, uint, 0);
  70module_param_named(settle, sym_driver_setup.settle_delay, byte, 0);
  71module_param_named(nvram, sym_driver_setup.use_nvram, byte, 0);
  72module_param_named(excl, excl_string, charp, 0);
  73module_param_named(safe, safe_string, charp, 0);
  74
  75MODULE_PARM_DESC(cmd_per_lun, "The maximum number of tags to use by default");
  76MODULE_PARM_DESC(burst, "Maximum burst.  0 to disable, 255 to read from registers");
  77MODULE_PARM_DESC(led, "Set to 1 to enable LED support");
  78MODULE_PARM_DESC(diff, "0 for no differential mode, 1 for BIOS, 2 for always, 3 for not GPIO3");
  79MODULE_PARM_DESC(irqm, "0 for open drain, 1 to leave alone, 2 for totem pole");
  80MODULE_PARM_DESC(buschk, "0 to not check, 1 for detach on error, 2 for warn on error");
  81MODULE_PARM_DESC(hostid, "The SCSI ID to use for the host adapters");
  82MODULE_PARM_DESC(verb, "0 for minimal verbosity, 1 for normal, 2 for excessive");
  83MODULE_PARM_DESC(debug, "Set bits to enable debugging");
  84MODULE_PARM_DESC(settle, "Settle delay in seconds.  Default 3");
  85MODULE_PARM_DESC(nvram, "Option currently not used");
  86MODULE_PARM_DESC(excl, "List ioport addresses here to prevent controllers from being attached");
  87MODULE_PARM_DESC(safe, "Set other settings to a \"safe mode\"");
  88
  89MODULE_LICENSE("GPL");
  90MODULE_VERSION(SYM_VERSION);
  91MODULE_AUTHOR("Matthew Wilcox <matthew@wil.cx>");
  92MODULE_DESCRIPTION("NCR, Symbios and LSI 8xx and 1010 PCI SCSI adapters");
  93
  94static void sym2_setup_params(void)
  95{
  96        char *p = excl_string;
  97        int xi = 0;
  98
  99        while (p && (xi < 8)) {
 100                char *next_p;
 101                int val = (int) simple_strtoul(p, &next_p, 0);
 102                sym_driver_setup.excludes[xi++] = val;
 103                p = next_p;
 104        }
 105
 106        if (safe_string) {
 107                if (*safe_string == 'y') {
 108                        sym_driver_setup.max_tag = 0;
 109                        sym_driver_setup.burst_order = 0;
 110                        sym_driver_setup.scsi_led = 0;
 111                        sym_driver_setup.scsi_diff = 1;
 112                        sym_driver_setup.irq_mode = 0;
 113                        sym_driver_setup.scsi_bus_check = 2;
 114                        sym_driver_setup.host_id = 7;
 115                        sym_driver_setup.verbose = 2;
 116                        sym_driver_setup.settle_delay = 10;
 117                        sym_driver_setup.use_nvram = 1;
 118                } else if (*safe_string != 'n') {
 119                        printk(KERN_WARNING NAME53C8XX "Ignoring parameter %s"
 120                                        " passed to safe option", safe_string);
 121                }
 122        }
 123}
 124
 125static struct scsi_transport_template *sym2_transport_template = NULL;
 126
 127/*
 128 *  Driver private area in the SCSI command structure.
 129 */
 130struct sym_ucmd {               /* Override the SCSI pointer structure */
 131        struct completion *eh_done;             /* SCSI error handling */
 132};
 133
 134#define SYM_UCMD_PTR(cmd)  ((struct sym_ucmd *)(&(cmd)->SCp))
 135#define SYM_SOFTC_PTR(cmd) sym_get_hcb(cmd->device->host)
 136
 137/*
 138 *  Complete a pending CAM CCB.
 139 */
 140void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *cmd)
 141{
 142        struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
 143        BUILD_BUG_ON(sizeof(struct scsi_pointer) < sizeof(struct sym_ucmd));
 144
 145        if (ucmd->eh_done)
 146                complete(ucmd->eh_done);
 147
 148        scsi_dma_unmap(cmd);
 149        cmd->scsi_done(cmd);
 150}
 151
 152/*
 153 *  Tell the SCSI layer about a BUS RESET.
 154 */
 155void sym_xpt_async_bus_reset(struct sym_hcb *np)
 156{
 157        printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
 158        np->s.settle_time = jiffies + sym_driver_setup.settle_delay * HZ;
 159        np->s.settle_time_valid = 1;
 160        if (sym_verbose >= 2)
 161                printf_info("%s: command processing suspended for %d seconds\n",
 162                            sym_name(np), sym_driver_setup.settle_delay);
 163}
 164
 165/*
 166 *  Choose the more appropriate CAM status if 
 167 *  the IO encountered an extended error.
 168 */
 169static int sym_xerr_cam_status(int cam_status, int x_status)
 170{
 171        if (x_status) {
 172                if      (x_status & XE_PARITY_ERR)
 173                        cam_status = DID_PARITY;
 174                else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN))
 175                        cam_status = DID_ERROR;
 176                else if (x_status & XE_BAD_PHASE)
 177                        cam_status = DID_ERROR;
 178                else
 179                        cam_status = DID_ERROR;
 180        }
 181        return cam_status;
 182}
 183
 184/*
 185 *  Build CAM result for a failed or auto-sensed IO.
 186 */
 187void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid)
 188{
 189        struct scsi_cmnd *cmd = cp->cmd;
 190        u_int cam_status, scsi_status, drv_status;
 191
 192        drv_status  = 0;
 193        cam_status  = DID_OK;
 194        scsi_status = cp->ssss_status;
 195
 196        if (cp->host_flags & HF_SENSE) {
 197                scsi_status = cp->sv_scsi_status;
 198                resid = cp->sv_resid;
 199                if (sym_verbose && cp->sv_xerr_status)
 200                        sym_print_xerr(cmd, cp->sv_xerr_status);
 201                if (cp->host_status == HS_COMPLETE &&
 202                    cp->ssss_status == S_GOOD &&
 203                    cp->xerr_status == 0) {
 204                        cam_status = sym_xerr_cam_status(DID_OK,
 205                                                         cp->sv_xerr_status);
 206                        drv_status = DRIVER_SENSE;
 207                        /*
 208                         *  Bounce back the sense data to user.
 209                         */
 210                        memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
 211                        memcpy(cmd->sense_buffer, cp->sns_bbuf,
 212                               min(SCSI_SENSE_BUFFERSIZE, SYM_SNS_BBUF_LEN));
 213#if 0
 214                        /*
 215                         *  If the device reports a UNIT ATTENTION condition 
 216                         *  due to a RESET condition, we should consider all 
 217                         *  disconnect CCBs for this unit as aborted.
 218                         */
 219                        if (1) {
 220                                u_char *p;
 221                                p  = (u_char *) cmd->sense_data;
 222                                if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
 223                                        sym_clear_tasks(np, DID_ABORT,
 224                                                        cp->target,cp->lun, -1);
 225                        }
 226#endif
 227                } else {
 228                        /*
 229                         * Error return from our internal request sense.  This
 230                         * is bad: we must clear the contingent allegiance
 231                         * condition otherwise the device will always return
 232                         * BUSY.  Use a big stick.
 233                         */
 234                        sym_reset_scsi_target(np, cmd->device->id);
 235                        cam_status = DID_ERROR;
 236                }
 237        } else if (cp->host_status == HS_COMPLETE)      /* Bad SCSI status */
 238                cam_status = DID_OK;
 239        else if (cp->host_status == HS_SEL_TIMEOUT)     /* Selection timeout */
 240                cam_status = DID_NO_CONNECT;
 241        else if (cp->host_status == HS_UNEXPECTED)      /* Unexpected BUS FREE*/
 242                cam_status = DID_ERROR;
 243        else {                                          /* Extended error */
 244                if (sym_verbose) {
 245                        sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
 246                                cp->host_status, cp->ssss_status,
 247                                cp->xerr_status);
 248                }
 249                /*
 250                 *  Set the most appropriate value for CAM status.
 251                 */
 252                cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
 253        }
 254        scsi_set_resid(cmd, resid);
 255        cmd->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
 256}
 257
 258static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
 259{
 260        int segment;
 261        int use_sg;
 262
 263        cp->data_len = 0;
 264
 265        use_sg = scsi_dma_map(cmd);
 266        if (use_sg > 0) {
 267                struct scatterlist *sg;
 268                struct sym_tcb *tp = &np->target[cp->target];
 269                struct sym_tblmove *data;
 270
 271                if (use_sg > SYM_CONF_MAX_SG) {
 272                        scsi_dma_unmap(cmd);
 273                        return -1;
 274                }
 275
 276                data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
 277
 278                scsi_for_each_sg(cmd, sg, use_sg, segment) {
 279                        dma_addr_t baddr = sg_dma_address(sg);
 280                        unsigned int len = sg_dma_len(sg);
 281
 282                        if ((len & 1) && (tp->head.wval & EWS)) {
 283                                len++;
 284                                cp->odd_byte_adjustment++;
 285                        }
 286
 287                        sym_build_sge(np, &data[segment], baddr, len);
 288                        cp->data_len += len;
 289                }
 290        } else {
 291                segment = -2;
 292        }
 293
 294        return segment;
 295}
 296
 297/*
 298 *  Queue a SCSI command.
 299 */
 300static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd)
 301{
 302        struct scsi_device *sdev = cmd->device;
 303        struct sym_tcb *tp;
 304        struct sym_lcb *lp;
 305        struct sym_ccb *cp;
 306        int     order;
 307
 308        /*
 309         *  Retrieve the target descriptor.
 310         */
 311        tp = &np->target[sdev->id];
 312
 313        /*
 314         *  Select tagged/untagged.
 315         */
 316        lp = sym_lp(tp, sdev->lun);
 317        order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
 318
 319        /*
 320         *  Queue the SCSI IO.
 321         */
 322        cp = sym_get_ccb(np, cmd, order);
 323        if (!cp)
 324                return 1;       /* Means resource shortage */
 325        sym_queue_scsiio(np, cmd, cp);
 326        return 0;
 327}
 328
 329/*
 330 *  Setup buffers and pointers that address the CDB.
 331 */
 332static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
 333{
 334        memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len);
 335
 336        cp->phys.cmd.addr = CCB_BA(cp, cdb_buf[0]);
 337        cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
 338
 339        return 0;
 340}
 341
 342/*
 343 *  Setup pointers that address the data and start the I/O.
 344 */
 345int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
 346{
 347        u32 lastp, goalp;
 348        int dir;
 349
 350        /*
 351         *  Build the CDB.
 352         */
 353        if (sym_setup_cdb(np, cmd, cp))
 354                goto out_abort;
 355
 356        /*
 357         *  No direction means no data.
 358         */
 359        dir = cmd->sc_data_direction;
 360        if (dir != DMA_NONE) {
 361                cp->segments = sym_scatter(np, cp, cmd);
 362                if (cp->segments < 0) {
 363                        sym_set_cam_status(cmd, DID_ERROR);
 364                        goto out_abort;
 365                }
 366
 367                /*
 368                 *  No segments means no data.
 369                 */
 370                if (!cp->segments)
 371                        dir = DMA_NONE;
 372        } else {
 373                cp->data_len = 0;
 374                cp->segments = 0;
 375        }
 376
 377        /*
 378         *  Set the data pointer.
 379         */
 380        switch (dir) {
 381        case DMA_BIDIRECTIONAL:
 382                scmd_printk(KERN_INFO, cmd, "got DMA_BIDIRECTIONAL command");
 383                sym_set_cam_status(cmd, DID_ERROR);
 384                goto out_abort;
 385        case DMA_TO_DEVICE:
 386                goalp = SCRIPTA_BA(np, data_out2) + 8;
 387                lastp = goalp - 8 - (cp->segments * (2*4));
 388                break;
 389        case DMA_FROM_DEVICE:
 390                cp->host_flags |= HF_DATA_IN;
 391                goalp = SCRIPTA_BA(np, data_in2) + 8;
 392                lastp = goalp - 8 - (cp->segments * (2*4));
 393                break;
 394        case DMA_NONE:
 395        default:
 396                lastp = goalp = SCRIPTB_BA(np, no_data);
 397                break;
 398        }
 399
 400        /*
 401         *  Set all pointers values needed by SCRIPTS.
 402         */
 403        cp->phys.head.lastp = cpu_to_scr(lastp);
 404        cp->phys.head.savep = cpu_to_scr(lastp);
 405        cp->startp          = cp->phys.head.savep;
 406        cp->goalp           = cpu_to_scr(goalp);
 407
 408        /*
 409         *  When `#ifed 1', the code below makes the driver 
 410         *  panic on the first attempt to write to a SCSI device.
 411         *  It is the first test we want to do after a driver 
 412         *  change that does not seem obviously safe. :)
 413         */
 414#if 0
 415        switch (cp->cdb_buf[0]) {
 416        case 0x0A: case 0x2A: case 0xAA:
 417                panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
 418                break;
 419        default:
 420                break;
 421        }
 422#endif
 423
 424        /*
 425         *      activate this job.
 426         */
 427        sym_put_start_queue(np, cp);
 428        return 0;
 429
 430out_abort:
 431        sym_free_ccb(np, cp);
 432        sym_xpt_done(np, cmd);
 433        return 0;
 434}
 435
 436
 437/*
 438 *  timer daemon.
 439 *
 440 *  Misused to keep the driver running when
 441 *  interrupts are not configured correctly.
 442 */
 443static void sym_timer(struct sym_hcb *np)
 444{
 445        unsigned long thistime = jiffies;
 446
 447        /*
 448         *  Restart the timer.
 449         */
 450        np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
 451        add_timer(&np->s.timer);
 452
 453        /*
 454         *  If we are resetting the ncr, wait for settle_time before 
 455         *  clearing it. Then command processing will be resumed.
 456         */
 457        if (np->s.settle_time_valid) {
 458                if (time_before_eq(np->s.settle_time, thistime)) {
 459                        if (sym_verbose >= 2 )
 460                                printk("%s: command processing resumed\n",
 461                                       sym_name(np));
 462                        np->s.settle_time_valid = 0;
 463                }
 464                return;
 465        }
 466
 467        /*
 468         *      Nothing to do for now, but that may come.
 469         */
 470        if (np->s.lasttime + 4*HZ < thistime) {
 471                np->s.lasttime = thistime;
 472        }
 473
 474#ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
 475        /*
 476         *  Some way-broken PCI bridges may lead to 
 477         *  completions being lost when the clearing 
 478         *  of the INTFLY flag by the CPU occurs 
 479         *  concurrently with the chip raising this flag.
 480         *  If this ever happen, lost completions will 
 481         * be reaped here.
 482         */
 483        sym_wakeup_done(np);
 484#endif
 485}
 486
 487
 488/*
 489 *  PCI BUS error handler.
 490 */
 491void sym_log_bus_error(struct Scsi_Host *shost)
 492{
 493        struct sym_data *sym_data = shost_priv(shost);
 494        struct pci_dev *pdev = sym_data->pdev;
 495        unsigned short pci_sts;
 496        pci_read_config_word(pdev, PCI_STATUS, &pci_sts);
 497        if (pci_sts & 0xf900) {
 498                pci_write_config_word(pdev, PCI_STATUS, pci_sts);
 499                shost_printk(KERN_WARNING, shost,
 500                        "PCI bus error: status = 0x%04x\n", pci_sts & 0xf900);
 501        }
 502}
 503
 504/*
 505 * queuecommand method.  Entered with the host adapter lock held and
 506 * interrupts disabled.
 507 */
 508static int sym53c8xx_queue_command_lck(struct scsi_cmnd *cmd,
 509                                        void (*done)(struct scsi_cmnd *))
 510{
 511        struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
 512        struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
 513        int sts = 0;
 514
 515        cmd->scsi_done = done;
 516        memset(ucp, 0, sizeof(*ucp));
 517
 518        /*
 519         *  Shorten our settle_time if needed for 
 520         *  this command not to time out.
 521         */
 522        if (np->s.settle_time_valid && cmd->request->timeout) {
 523                unsigned long tlimit = jiffies + cmd->request->timeout;
 524                tlimit -= SYM_CONF_TIMER_INTERVAL*2;
 525                if (time_after(np->s.settle_time, tlimit)) {
 526                        np->s.settle_time = tlimit;
 527                }
 528        }
 529
 530        if (np->s.settle_time_valid)
 531                return SCSI_MLQUEUE_HOST_BUSY;
 532
 533        sts = sym_queue_command(np, cmd);
 534        if (sts)
 535                return SCSI_MLQUEUE_HOST_BUSY;
 536        return 0;
 537}
 538
 539static DEF_SCSI_QCMD(sym53c8xx_queue_command)
 540
 541/*
 542 *  Linux entry point of the interrupt handler.
 543 */
 544static irqreturn_t sym53c8xx_intr(int irq, void *dev_id)
 545{
 546        struct Scsi_Host *shost = dev_id;
 547        struct sym_data *sym_data = shost_priv(shost);
 548        irqreturn_t result;
 549
 550        /* Avoid spinloop trying to handle interrupts on frozen device */
 551        if (pci_channel_offline(sym_data->pdev))
 552                return IRQ_NONE;
 553
 554        if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
 555
 556        spin_lock(shost->host_lock);
 557        result = sym_interrupt(shost);
 558        spin_unlock(shost->host_lock);
 559
 560        if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
 561
 562        return result;
 563}
 564
 565/*
 566 *  Linux entry point of the timer handler
 567 */
 568static void sym53c8xx_timer(unsigned long npref)
 569{
 570        struct sym_hcb *np = (struct sym_hcb *)npref;
 571        unsigned long flags;
 572
 573        spin_lock_irqsave(np->s.host->host_lock, flags);
 574        sym_timer(np);
 575        spin_unlock_irqrestore(np->s.host->host_lock, flags);
 576}
 577
 578
 579/*
 580 *  What the eh thread wants us to perform.
 581 */
 582#define SYM_EH_ABORT            0
 583#define SYM_EH_DEVICE_RESET     1
 584#define SYM_EH_BUS_RESET        2
 585#define SYM_EH_HOST_RESET       3
 586
 587/*
 588 *  Generic method for our eh processing.
 589 *  The 'op' argument tells what we have to do.
 590 */
 591static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
 592{
 593        struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
 594        struct Scsi_Host *shost = cmd->device->host;
 595        struct sym_data *sym_data = shost_priv(shost);
 596        struct pci_dev *pdev = sym_data->pdev;
 597        struct sym_hcb *np = sym_data->ncb;
 598        SYM_QUEHEAD *qp;
 599        int cmd_queued = 0;
 600        int sts = -1;
 601        struct completion eh_done;
 602
 603        scmd_printk(KERN_WARNING, cmd, "%s operation started\n", opname);
 604
 605        /* We may be in an error condition because the PCI bus
 606         * went down. In this case, we need to wait until the
 607         * PCI bus is reset, the card is reset, and only then
 608         * proceed with the scsi error recovery.  There's no
 609         * point in hurrying; take a leisurely wait.
 610         */
 611#define WAIT_FOR_PCI_RECOVERY   35
 612        if (pci_channel_offline(pdev)) {
 613                int finished_reset = 0;
 614                init_completion(&eh_done);
 615                spin_lock_irq(shost->host_lock);
 616                /* Make sure we didn't race */
 617                if (pci_channel_offline(pdev)) {
 618                        BUG_ON(sym_data->io_reset);
 619                        sym_data->io_reset = &eh_done;
 620                } else {
 621                        finished_reset = 1;
 622                }
 623                spin_unlock_irq(shost->host_lock);
 624                if (!finished_reset)
 625                        finished_reset = wait_for_completion_timeout
 626                                                (sym_data->io_reset,
 627                                                WAIT_FOR_PCI_RECOVERY*HZ);
 628                spin_lock_irq(shost->host_lock);
 629                sym_data->io_reset = NULL;
 630                spin_unlock_irq(shost->host_lock);
 631                if (!finished_reset)
 632                        return SCSI_FAILED;
 633        }
 634
 635        spin_lock_irq(shost->host_lock);
 636        /* This one is queued in some place -> to wait for completion */
 637        FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
 638                struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
 639                if (cp->cmd == cmd) {
 640                        cmd_queued = 1;
 641                        break;
 642                }
 643        }
 644
 645        /* Try to proceed the operation we have been asked for */
 646        sts = -1;
 647        switch(op) {
 648        case SYM_EH_ABORT:
 649                sts = sym_abort_scsiio(np, cmd, 1);
 650                break;
 651        case SYM_EH_DEVICE_RESET:
 652                sts = sym_reset_scsi_target(np, cmd->device->id);
 653                break;
 654        case SYM_EH_BUS_RESET:
 655                sym_reset_scsi_bus(np, 1);
 656                sts = 0;
 657                break;
 658        case SYM_EH_HOST_RESET:
 659                sym_reset_scsi_bus(np, 0);
 660                sym_start_up(shost, 1);
 661                sts = 0;
 662                break;
 663        default:
 664                break;
 665        }
 666
 667        /* On error, restore everything and cross fingers :) */
 668        if (sts)
 669                cmd_queued = 0;
 670
 671        if (cmd_queued) {
 672                init_completion(&eh_done);
 673                ucmd->eh_done = &eh_done;
 674                spin_unlock_irq(shost->host_lock);
 675                if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
 676                        ucmd->eh_done = NULL;
 677                        sts = -2;
 678                }
 679        } else {
 680                spin_unlock_irq(shost->host_lock);
 681        }
 682
 683        dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
 684                        sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
 685        return sts ? SCSI_FAILED : SCSI_SUCCESS;
 686}
 687
 688
 689/*
 690 * Error handlers called from the eh thread (one thread per HBA).
 691 */
 692static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
 693{
 694        return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
 695}
 696
 697static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
 698{
 699        return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
 700}
 701
 702static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
 703{
 704        return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
 705}
 706
 707static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
 708{
 709        return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
 710}
 711
 712/*
 713 *  Tune device queuing depth, according to various limits.
 714 */
 715static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
 716{
 717        struct sym_lcb *lp = sym_lp(tp, lun);
 718        u_short oldtags;
 719
 720        if (!lp)
 721                return;
 722
 723        oldtags = lp->s.reqtags;
 724
 725        if (reqtags > lp->s.scdev_depth)
 726                reqtags = lp->s.scdev_depth;
 727
 728        lp->s.reqtags     = reqtags;
 729
 730        if (reqtags != oldtags) {
 731                dev_info(&tp->starget->dev,
 732                         "tagged command queuing %s, command queue depth %d.\n",
 733                          lp->s.reqtags ? "enabled" : "disabled", reqtags);
 734        }
 735}
 736
 737static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
 738{
 739        struct sym_hcb *np = sym_get_hcb(sdev->host);
 740        struct sym_tcb *tp = &np->target[sdev->id];
 741        struct sym_lcb *lp;
 742        unsigned long flags;
 743        int error;
 744
 745        if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
 746                return -ENXIO;
 747
 748        spin_lock_irqsave(np->s.host->host_lock, flags);
 749
 750        /*
 751         * Fail the device init if the device is flagged NOSCAN at BOOT in
 752         * the NVRAM.  This may speed up boot and maintain coherency with
 753         * BIOS device numbering.  Clearing the flag allows the user to
 754         * rescan skipped devices later.  We also return an error for
 755         * devices not flagged for SCAN LUNS in the NVRAM since some single
 756         * lun devices behave badly when asked for a non zero LUN.
 757         */
 758
 759        if (tp->usrflags & SYM_SCAN_BOOT_DISABLED) {
 760                tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
 761                starget_printk(KERN_INFO, sdev->sdev_target,
 762                                "Scan at boot disabled in NVRAM\n");
 763                error = -ENXIO;
 764                goto out;
 765        }
 766
 767        if (tp->usrflags & SYM_SCAN_LUNS_DISABLED) {
 768                if (sdev->lun != 0) {
 769                        error = -ENXIO;
 770                        goto out;
 771                }
 772                starget_printk(KERN_INFO, sdev->sdev_target,
 773                                "Multiple LUNs disabled in NVRAM\n");
 774        }
 775
 776        lp = sym_alloc_lcb(np, sdev->id, sdev->lun);
 777        if (!lp) {
 778                error = -ENOMEM;
 779                goto out;
 780        }
 781        if (tp->nlcb == 1)
 782                tp->starget = sdev->sdev_target;
 783
 784        spi_min_period(tp->starget) = tp->usr_period;
 785        spi_max_width(tp->starget) = tp->usr_width;
 786
 787        error = 0;
 788out:
 789        spin_unlock_irqrestore(np->s.host->host_lock, flags);
 790
 791        return error;
 792}
 793
 794/*
 795 * Linux entry point for device queue sizing.
 796 */
 797static int sym53c8xx_slave_configure(struct scsi_device *sdev)
 798{
 799        struct sym_hcb *np = sym_get_hcb(sdev->host);
 800        struct sym_tcb *tp = &np->target[sdev->id];
 801        struct sym_lcb *lp = sym_lp(tp, sdev->lun);
 802        int reqtags, depth_to_use;
 803
 804        /*
 805         *  Get user flags.
 806         */
 807        lp->curr_flags = lp->user_flags;
 808
 809        /*
 810         *  Select queue depth from driver setup.
 811         *  Do not use more than configured by user.
 812         *  Use at least 1.
 813         *  Do not use more than our maximum.
 814         */
 815        reqtags = sym_driver_setup.max_tag;
 816        if (reqtags > tp->usrtags)
 817                reqtags = tp->usrtags;
 818        if (!sdev->tagged_supported)
 819                reqtags = 0;
 820        if (reqtags > SYM_CONF_MAX_TAG)
 821                reqtags = SYM_CONF_MAX_TAG;
 822        depth_to_use = reqtags ? reqtags : 1;
 823        scsi_adjust_queue_depth(sdev,
 824                                sdev->tagged_supported ? MSG_SIMPLE_TAG : 0,
 825                                depth_to_use);
 826        lp->s.scdev_depth = depth_to_use;
 827        sym_tune_dev_queuing(tp, sdev->lun, reqtags);
 828
 829        if (!spi_initial_dv(sdev->sdev_target))
 830                spi_dv_device(sdev);
 831
 832        return 0;
 833}
 834
 835static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
 836{
 837        struct sym_hcb *np = sym_get_hcb(sdev->host);
 838        struct sym_tcb *tp = &np->target[sdev->id];
 839        struct sym_lcb *lp = sym_lp(tp, sdev->lun);
 840        unsigned long flags;
 841
 842        /* if slave_alloc returned before allocating a sym_lcb, return */
 843        if (!lp)
 844                return;
 845
 846        spin_lock_irqsave(np->s.host->host_lock, flags);
 847
 848        if (lp->busy_itlq || lp->busy_itl) {
 849                /*
 850                 * This really shouldn't happen, but we can't return an error
 851                 * so let's try to stop all on-going I/O.
 852                 */
 853                starget_printk(KERN_WARNING, tp->starget,
 854                               "Removing busy LCB (%d)\n", sdev->lun);
 855                sym_reset_scsi_bus(np, 1);
 856        }
 857
 858        if (sym_free_lcb(np, sdev->id, sdev->lun) == 0) {
 859                /*
 860                 * It was the last unit for this target.
 861                 */
 862                tp->head.sval        = 0;
 863                tp->head.wval        = np->rv_scntl3;
 864                tp->head.uval        = 0;
 865                tp->tgoal.check_nego = 1;
 866                tp->starget          = NULL;
 867        }
 868
 869        spin_unlock_irqrestore(np->s.host->host_lock, flags);
 870}
 871
 872/*
 873 *  Linux entry point for info() function
 874 */
 875static const char *sym53c8xx_info (struct Scsi_Host *host)
 876{
 877        return SYM_DRIVER_NAME;
 878}
 879
 880
 881#ifdef SYM_LINUX_PROC_INFO_SUPPORT
 882/*
 883 *  Proc file system stuff
 884 *
 885 *  A read operation returns adapter information.
 886 *  A write operation is a control command.
 887 *  The string is parsed in the driver code and the command is passed 
 888 *  to the sym_usercmd() function.
 889 */
 890
 891#ifdef SYM_LINUX_USER_COMMAND_SUPPORT
 892
 893struct  sym_usrcmd {
 894        u_long  target;
 895        u_long  lun;
 896        u_long  data;
 897        u_long  cmd;
 898};
 899
 900#define UC_SETSYNC      10
 901#define UC_SETTAGS      11
 902#define UC_SETDEBUG     12
 903#define UC_SETWIDE      14
 904#define UC_SETFLAG      15
 905#define UC_SETVERBOSE   17
 906#define UC_RESETDEV     18
 907#define UC_CLEARDEV     19
 908
 909static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
 910{
 911        struct sym_tcb *tp;
 912        int t, l;
 913
 914        switch (uc->cmd) {
 915        case 0: return;
 916
 917#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
 918        case UC_SETDEBUG:
 919                sym_debug_flags = uc->data;
 920                break;
 921#endif
 922        case UC_SETVERBOSE:
 923                np->verbose = uc->data;
 924                break;
 925        default:
 926                /*
 927                 * We assume that other commands apply to targets.
 928                 * This should always be the case and avoid the below 
 929                 * 4 lines to be repeated 6 times.
 930                 */
 931                for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
 932                        if (!((uc->target >> t) & 1))
 933                                continue;
 934                        tp = &np->target[t];
 935                        if (!tp->nlcb)
 936                                continue;
 937
 938                        switch (uc->cmd) {
 939
 940                        case UC_SETSYNC:
 941                                if (!uc->data || uc->data >= 255) {
 942                                        tp->tgoal.iu = tp->tgoal.dt =
 943                                                tp->tgoal.qas = 0;
 944                                        tp->tgoal.offset = 0;
 945                                } else if (uc->data <= 9 && np->minsync_dt) {
 946                                        if (uc->data < np->minsync_dt)
 947                                                uc->data = np->minsync_dt;
 948                                        tp->tgoal.iu = tp->tgoal.dt =
 949                                                tp->tgoal.qas = 1;
 950                                        tp->tgoal.width = 1;
 951                                        tp->tgoal.period = uc->data;
 952                                        tp->tgoal.offset = np->maxoffs_dt;
 953                                } else {
 954                                        if (uc->data < np->minsync)
 955                                                uc->data = np->minsync;
 956                                        tp->tgoal.iu = tp->tgoal.dt =
 957                                                tp->tgoal.qas = 0;
 958                                        tp->tgoal.period = uc->data;
 959                                        tp->tgoal.offset = np->maxoffs;
 960                                }
 961                                tp->tgoal.check_nego = 1;
 962                                break;
 963                        case UC_SETWIDE:
 964                                tp->tgoal.width = uc->data ? 1 : 0;
 965                                tp->tgoal.check_nego = 1;
 966                                break;
 967                        case UC_SETTAGS:
 968                                for (l = 0; l < SYM_CONF_MAX_LUN; l++)
 969                                        sym_tune_dev_queuing(tp, l, uc->data);
 970                                break;
 971                        case UC_RESETDEV:
 972                                tp->to_reset = 1;
 973                                np->istat_sem = SEM;
 974                                OUTB(np, nc_istat, SIGP|SEM);
 975                                break;
 976                        case UC_CLEARDEV:
 977                                for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
 978                                        struct sym_lcb *lp = sym_lp(tp, l);
 979                                        if (lp) lp->to_clear = 1;
 980                                }
 981                                np->istat_sem = SEM;
 982                                OUTB(np, nc_istat, SIGP|SEM);
 983                                break;
 984                        case UC_SETFLAG:
 985                                tp->usrflags = uc->data;
 986                                break;
 987                        }
 988                }
 989                break;
 990        }
 991}
 992
 993static int sym_skip_spaces(char *ptr, int len)
 994{
 995        int cnt, c;
 996
 997        for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
 998
 999        return (len - cnt);
1000}
1001
1002static int get_int_arg(char *ptr, int len, u_long *pv)
1003{
1004        char *end;
1005
1006        *pv = simple_strtoul(ptr, &end, 10);
1007        return (end - ptr);
1008}
1009
1010static int is_keyword(char *ptr, int len, char *verb)
1011{
1012        int verb_len = strlen(verb);
1013
1014        if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1015                return verb_len;
1016        else
1017                return 0;
1018}
1019
1020#define SKIP_SPACES(ptr, len)                                           \
1021        if ((arg_len = sym_skip_spaces(ptr, len)) < 1)                  \
1022                return -EINVAL;                                         \
1023        ptr += arg_len; len -= arg_len;
1024
1025#define GET_INT_ARG(ptr, len, v)                                        \
1026        if (!(arg_len = get_int_arg(ptr, len, &(v))))                   \
1027                return -EINVAL;                                         \
1028        ptr += arg_len; len -= arg_len;
1029
1030
1031/*
1032 * Parse a control command
1033 */
1034
1035static int sym_user_command(struct Scsi_Host *shost, char *buffer, int length)
1036{
1037        struct sym_hcb *np = sym_get_hcb(shost);
1038        char *ptr       = buffer;
1039        int len         = length;
1040        struct sym_usrcmd cmd, *uc = &cmd;
1041        int             arg_len;
1042        u_long          target;
1043
1044        memset(uc, 0, sizeof(*uc));
1045
1046        if (len > 0 && ptr[len-1] == '\n')
1047                --len;
1048
1049        if      ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1050                uc->cmd = UC_SETSYNC;
1051        else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1052                uc->cmd = UC_SETTAGS;
1053        else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1054                uc->cmd = UC_SETVERBOSE;
1055        else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1056                uc->cmd = UC_SETWIDE;
1057#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1058        else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1059                uc->cmd = UC_SETDEBUG;
1060#endif
1061        else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1062                uc->cmd = UC_SETFLAG;
1063        else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1064                uc->cmd = UC_RESETDEV;
1065        else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1066                uc->cmd = UC_CLEARDEV;
1067        else
1068                arg_len = 0;
1069
1070#ifdef DEBUG_PROC_INFO
1071printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1072#endif
1073
1074        if (!arg_len)
1075                return -EINVAL;
1076        ptr += arg_len; len -= arg_len;
1077
1078        switch(uc->cmd) {
1079        case UC_SETSYNC:
1080        case UC_SETTAGS:
1081        case UC_SETWIDE:
1082        case UC_SETFLAG:
1083        case UC_RESETDEV:
1084        case UC_CLEARDEV:
1085                SKIP_SPACES(ptr, len);
1086                if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1087                        ptr += arg_len; len -= arg_len;
1088                        uc->target = ~0;
1089                } else {
1090                        GET_INT_ARG(ptr, len, target);
1091                        uc->target = (1<<target);
1092#ifdef DEBUG_PROC_INFO
1093printk("sym_user_command: target=%ld\n", target);
1094#endif
1095                }
1096                break;
1097        }
1098
1099        switch(uc->cmd) {
1100        case UC_SETVERBOSE:
1101        case UC_SETSYNC:
1102        case UC_SETTAGS:
1103        case UC_SETWIDE:
1104                SKIP_SPACES(ptr, len);
1105                GET_INT_ARG(ptr, len, uc->data);
1106#ifdef DEBUG_PROC_INFO
1107printk("sym_user_command: data=%ld\n", uc->data);
1108#endif
1109                break;
1110#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1111        case UC_SETDEBUG:
1112                while (len > 0) {
1113                        SKIP_SPACES(ptr, len);
1114                        if      ((arg_len = is_keyword(ptr, len, "alloc")))
1115                                uc->data |= DEBUG_ALLOC;
1116                        else if ((arg_len = is_keyword(ptr, len, "phase")))
1117                                uc->data |= DEBUG_PHASE;
1118                        else if ((arg_len = is_keyword(ptr, len, "queue")))
1119                                uc->data |= DEBUG_QUEUE;
1120                        else if ((arg_len = is_keyword(ptr, len, "result")))
1121                                uc->data |= DEBUG_RESULT;
1122                        else if ((arg_len = is_keyword(ptr, len, "scatter")))
1123                                uc->data |= DEBUG_SCATTER;
1124                        else if ((arg_len = is_keyword(ptr, len, "script")))
1125                                uc->data |= DEBUG_SCRIPT;
1126                        else if ((arg_len = is_keyword(ptr, len, "tiny")))
1127                                uc->data |= DEBUG_TINY;
1128                        else if ((arg_len = is_keyword(ptr, len, "timing")))
1129                                uc->data |= DEBUG_TIMING;
1130                        else if ((arg_len = is_keyword(ptr, len, "nego")))
1131                                uc->data |= DEBUG_NEGO;
1132                        else if ((arg_len = is_keyword(ptr, len, "tags")))
1133                                uc->data |= DEBUG_TAGS;
1134                        else if ((arg_len = is_keyword(ptr, len, "pointer")))
1135                                uc->data |= DEBUG_POINTER;
1136                        else
1137                                return -EINVAL;
1138                        ptr += arg_len; len -= arg_len;
1139                }
1140#ifdef DEBUG_PROC_INFO
1141printk("sym_user_command: data=%ld\n", uc->data);
1142#endif
1143                break;
1144#endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1145        case UC_SETFLAG:
1146                while (len > 0) {
1147                        SKIP_SPACES(ptr, len);
1148                        if      ((arg_len = is_keyword(ptr, len, "no_disc")))
1149                                uc->data &= ~SYM_DISC_ENABLED;
1150                        else
1151                                return -EINVAL;
1152                        ptr += arg_len; len -= arg_len;
1153                }
1154                break;
1155        default:
1156                break;
1157        }
1158
1159        if (len)
1160                return -EINVAL;
1161        else {
1162                unsigned long flags;
1163
1164                spin_lock_irqsave(shost->host_lock, flags);
1165                sym_exec_user_command(np, uc);
1166                spin_unlock_irqrestore(shost->host_lock, flags);
1167        }
1168        return length;
1169}
1170
1171#endif  /* SYM_LINUX_USER_COMMAND_SUPPORT */
1172
1173
1174/*
1175 *  Copy formatted information into the input buffer.
1176 */
1177static int sym_show_info(struct seq_file *m, struct Scsi_Host *shost)
1178{
1179#ifdef SYM_LINUX_USER_INFO_SUPPORT
1180        struct sym_data *sym_data = shost_priv(shost);
1181        struct pci_dev *pdev = sym_data->pdev;
1182        struct sym_hcb *np = sym_data->ncb;
1183
1184        seq_printf(m, "Chip " NAME53C "%s, device id 0x%x, "
1185                 "revision id 0x%x\n", np->s.chip_name,
1186                 pdev->device, pdev->revision);
1187        seq_printf(m, "At PCI address %s, IRQ %u\n",
1188                         pci_name(pdev), pdev->irq);
1189        seq_printf(m, "Min. period factor %d, %s SCSI BUS%s\n",
1190                 (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1191                 np->maxwide ? "Wide" : "Narrow",
1192                 np->minsync_dt ? ", DT capable" : "");
1193
1194        seq_printf(m, "Max. started commands %d, "
1195                 "max. commands per LUN %d\n",
1196                 SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1197
1198        return 0;
1199#else
1200        return -EINVAL;
1201#endif /* SYM_LINUX_USER_INFO_SUPPORT */
1202}
1203
1204#endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1205
1206/*
1207 * Free resources claimed by sym_iomap_device().  Note that
1208 * sym_free_resources() should be used instead of this function after calling
1209 * sym_attach().
1210 */
1211static void sym_iounmap_device(struct sym_device *device)
1212{
1213        if (device->s.ioaddr)
1214                pci_iounmap(device->pdev, device->s.ioaddr);
1215        if (device->s.ramaddr)
1216                pci_iounmap(device->pdev, device->s.ramaddr);
1217}
1218
1219/*
1220 *      Free controller resources.
1221 */
1222static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev,
1223                int do_free_irq)
1224{
1225        /*
1226         *  Free O/S specific resources.
1227         */
1228        if (do_free_irq)
1229                free_irq(pdev->irq, np->s.host);
1230        if (np->s.ioaddr)
1231                pci_iounmap(pdev, np->s.ioaddr);
1232        if (np->s.ramaddr)
1233                pci_iounmap(pdev, np->s.ramaddr);
1234        /*
1235         *  Free O/S independent resources.
1236         */
1237        sym_hcb_free(np);
1238
1239        sym_mfree_dma(np, sizeof(*np), "HCB");
1240}
1241
1242/*
1243 *  Host attach and initialisations.
1244 *
1245 *  Allocate host data and ncb structure.
1246 *  Remap MMIO region.
1247 *  Do chip initialization.
1248 *  If all is OK, install interrupt handling and
1249 *  start the timer daemon.
1250 */
1251static struct Scsi_Host *sym_attach(struct scsi_host_template *tpnt, int unit,
1252                                    struct sym_device *dev)
1253{
1254        struct sym_data *sym_data;
1255        struct sym_hcb *np = NULL;
1256        struct Scsi_Host *shost = NULL;
1257        struct pci_dev *pdev = dev->pdev;
1258        unsigned long flags;
1259        struct sym_fw *fw;
1260        int do_free_irq = 0;
1261
1262        printk(KERN_INFO "sym%d: <%s> rev 0x%x at pci %s irq %u\n",
1263                unit, dev->chip.name, pdev->revision, pci_name(pdev),
1264                pdev->irq);
1265
1266        /*
1267         *  Get the firmware for this chip.
1268         */
1269        fw = sym_find_firmware(&dev->chip);
1270        if (!fw)
1271                goto attach_failed;
1272
1273        shost = scsi_host_alloc(tpnt, sizeof(*sym_data));
1274        if (!shost)
1275                goto attach_failed;
1276        sym_data = shost_priv(shost);
1277
1278        /*
1279         *  Allocate immediately the host control block, 
1280         *  since we are only expecting to succeed. :)
1281         *  We keep track in the HCB of all the resources that 
1282         *  are to be released on error.
1283         */
1284        np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1285        if (!np)
1286                goto attach_failed;
1287        np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1288        sym_data->ncb = np;
1289        sym_data->pdev = pdev;
1290        np->s.host = shost;
1291
1292        pci_set_drvdata(pdev, shost);
1293
1294        /*
1295         *  Copy some useful infos to the HCB.
1296         */
1297        np->hcb_ba      = vtobus(np);
1298        np->verbose     = sym_driver_setup.verbose;
1299        np->s.unit      = unit;
1300        np->features    = dev->chip.features;
1301        np->clock_divn  = dev->chip.nr_divisor;
1302        np->maxoffs     = dev->chip.offset_max;
1303        np->maxburst    = dev->chip.burst_max;
1304        np->myaddr      = dev->host_id;
1305        np->mmio_ba     = (u32)dev->mmio_base;
1306        np->ram_ba      = (u32)dev->ram_base;
1307        np->s.ioaddr    = dev->s.ioaddr;
1308        np->s.ramaddr   = dev->s.ramaddr;
1309
1310        /*
1311         *  Edit its name.
1312         */
1313        strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1314        sprintf(np->s.inst_name, "sym%d", np->s.unit);
1315
1316        if ((SYM_CONF_DMA_ADDRESSING_MODE > 0) && (np->features & FE_DAC) &&
1317                        !pci_set_dma_mask(pdev, DMA_DAC_MASK)) {
1318                set_dac(np);
1319        } else if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
1320                printf_warning("%s: No suitable DMA available\n", sym_name(np));
1321                goto attach_failed;
1322        }
1323
1324        if (sym_hcb_attach(shost, fw, dev->nvram))
1325                goto attach_failed;
1326
1327        /*
1328         *  Install the interrupt handler.
1329         *  If we synchonize the C code with SCRIPTS on interrupt, 
1330         *  we do not want to share the INTR line at all.
1331         */
1332        if (request_irq(pdev->irq, sym53c8xx_intr, IRQF_SHARED, NAME53C8XX,
1333                        shost)) {
1334                printf_err("%s: request irq %u failure\n",
1335                        sym_name(np), pdev->irq);
1336                goto attach_failed;
1337        }
1338        do_free_irq = 1;
1339
1340        /*
1341         *  After SCSI devices have been opened, we cannot
1342         *  reset the bus safely, so we do it here.
1343         */
1344        spin_lock_irqsave(shost->host_lock, flags);
1345        if (sym_reset_scsi_bus(np, 0))
1346                goto reset_failed;
1347
1348        /*
1349         *  Start the SCRIPTS.
1350         */
1351        sym_start_up(shost, 1);
1352
1353        /*
1354         *  Start the timer daemon
1355         */
1356        init_timer(&np->s.timer);
1357        np->s.timer.data     = (unsigned long) np;
1358        np->s.timer.function = sym53c8xx_timer;
1359        np->s.lasttime=0;
1360        sym_timer (np);
1361
1362        /*
1363         *  Fill Linux host instance structure
1364         *  and return success.
1365         */
1366        shost->max_channel      = 0;
1367        shost->this_id          = np->myaddr;
1368        shost->max_id           = np->maxwide ? 16 : 8;
1369        shost->max_lun          = SYM_CONF_MAX_LUN;
1370        shost->unique_id        = pci_resource_start(pdev, 0);
1371        shost->cmd_per_lun      = SYM_CONF_MAX_TAG;
1372        shost->can_queue        = (SYM_CONF_MAX_START-2);
1373        shost->sg_tablesize     = SYM_CONF_MAX_SG;
1374        shost->max_cmd_len      = 16;
1375        BUG_ON(sym2_transport_template == NULL);
1376        shost->transportt       = sym2_transport_template;
1377
1378        /* 53c896 rev 1 errata: DMA may not cross 16MB boundary */
1379        if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 2)
1380                shost->dma_boundary = 0xFFFFFF;
1381
1382        spin_unlock_irqrestore(shost->host_lock, flags);
1383
1384        return shost;
1385
1386 reset_failed:
1387        printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1388                   "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1389        spin_unlock_irqrestore(shost->host_lock, flags);
1390 attach_failed:
1391        printf_info("sym%d: giving up ...\n", unit);
1392        if (np)
1393                sym_free_resources(np, pdev, do_free_irq);
1394        else
1395                sym_iounmap_device(dev);
1396        if (shost)
1397                scsi_host_put(shost);
1398
1399        return NULL;
1400 }
1401
1402
1403/*
1404 *    Detect and try to read SYMBIOS and TEKRAM NVRAM.
1405 */
1406#if SYM_CONF_NVRAM_SUPPORT
1407static void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1408{
1409        devp->nvram = nvp;
1410        nvp->type = 0;
1411
1412        sym_read_nvram(devp, nvp);
1413}
1414#else
1415static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1416{
1417}
1418#endif  /* SYM_CONF_NVRAM_SUPPORT */
1419
1420static int sym_check_supported(struct sym_device *device)
1421{
1422        struct sym_chip *chip;
1423        struct pci_dev *pdev = device->pdev;
1424        unsigned long io_port = pci_resource_start(pdev, 0);
1425        int i;
1426
1427        /*
1428         *  If user excluded this chip, do not initialize it.
1429         *  I hate this code so much.  Must kill it.
1430         */
1431        if (io_port) {
1432                for (i = 0 ; i < 8 ; i++) {
1433                        if (sym_driver_setup.excludes[i] == io_port)
1434                                return -ENODEV;
1435                }
1436        }
1437
1438        /*
1439         * Check if the chip is supported.  Then copy the chip description
1440         * to our device structure so we can make it match the actual device
1441         * and options.
1442         */
1443        chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1444        if (!chip) {
1445                dev_info(&pdev->dev, "device not supported\n");
1446                return -ENODEV;
1447        }
1448        memcpy(&device->chip, chip, sizeof(device->chip));
1449
1450        return 0;
1451}
1452
1453/*
1454 * Ignore Symbios chips controlled by various RAID controllers.
1455 * These controllers set value 0x52414944 at RAM end - 16.
1456 */
1457static int sym_check_raid(struct sym_device *device)
1458{
1459        unsigned int ram_size, ram_val;
1460
1461        if (!device->s.ramaddr)
1462                return 0;
1463
1464        if (device->chip.features & FE_RAM8K)
1465                ram_size = 8192;
1466        else
1467                ram_size = 4096;
1468
1469        ram_val = readl(device->s.ramaddr + ram_size - 16);
1470        if (ram_val != 0x52414944)
1471                return 0;
1472
1473        dev_info(&device->pdev->dev,
1474                        "not initializing, driven by RAID controller.\n");
1475        return -ENODEV;
1476}
1477
1478static int sym_set_workarounds(struct sym_device *device)
1479{
1480        struct sym_chip *chip = &device->chip;
1481        struct pci_dev *pdev = device->pdev;
1482        u_short status_reg;
1483
1484        /*
1485         *  (ITEM 12 of a DEL about the 896 I haven't yet).
1486         *  We must ensure the chip will use WRITE AND INVALIDATE.
1487         *  The revision number limit is for now arbitrary.
1488         */
1489        if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 0x4) {
1490                chip->features  |= (FE_WRIE | FE_CLSE);
1491        }
1492
1493        /* If the chip can do Memory Write Invalidate, enable it */
1494        if (chip->features & FE_WRIE) {
1495                if (pci_set_mwi(pdev))
1496                        return -ENODEV;
1497        }
1498
1499        /*
1500         *  Work around for errant bit in 895A. The 66Mhz
1501         *  capable bit is set erroneously. Clear this bit.
1502         *  (Item 1 DEL 533)
1503         *
1504         *  Make sure Config space and Features agree.
1505         *
1506         *  Recall: writes are not normal to status register -
1507         *  write a 1 to clear and a 0 to leave unchanged.
1508         *  Can only reset bits.
1509         */
1510        pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1511        if (chip->features & FE_66MHZ) {
1512                if (!(status_reg & PCI_STATUS_66MHZ))
1513                        chip->features &= ~FE_66MHZ;
1514        } else {
1515                if (status_reg & PCI_STATUS_66MHZ) {
1516                        status_reg = PCI_STATUS_66MHZ;
1517                        pci_write_config_word(pdev, PCI_STATUS, status_reg);
1518                        pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1519                }
1520        }
1521
1522        return 0;
1523}
1524
1525/*
1526 * Map HBA registers and on-chip SRAM (if present).
1527 */
1528static int sym_iomap_device(struct sym_device *device)
1529{
1530        struct pci_dev *pdev = device->pdev;
1531        struct pci_bus_region bus_addr;
1532        int i = 2;
1533
1534        pcibios_resource_to_bus(pdev->bus, &bus_addr, &pdev->resource[1]);
1535        device->mmio_base = bus_addr.start;
1536
1537        if (device->chip.features & FE_RAM) {
1538                /*
1539                 * If the BAR is 64-bit, resource 2 will be occupied by the
1540                 * upper 32 bits
1541                 */
1542                if (!pdev->resource[i].flags)
1543                        i++;
1544                pcibios_resource_to_bus(pdev->bus, &bus_addr,
1545                                        &pdev->resource[i]);
1546                device->ram_base = bus_addr.start;
1547        }
1548
1549#ifdef CONFIG_SCSI_SYM53C8XX_MMIO
1550        if (device->mmio_base)
1551                device->s.ioaddr = pci_iomap(pdev, 1,
1552                                                pci_resource_len(pdev, 1));
1553#endif
1554        if (!device->s.ioaddr)
1555                device->s.ioaddr = pci_iomap(pdev, 0,
1556                                                pci_resource_len(pdev, 0));
1557        if (!device->s.ioaddr) {
1558                dev_err(&pdev->dev, "could not map registers; giving up.\n");
1559                return -EIO;
1560        }
1561        if (device->ram_base) {
1562                device->s.ramaddr = pci_iomap(pdev, i,
1563                                                pci_resource_len(pdev, i));
1564                if (!device->s.ramaddr) {
1565                        dev_warn(&pdev->dev,
1566                                "could not map SRAM; continuing anyway.\n");
1567                        device->ram_base = 0;
1568                }
1569        }
1570
1571        return 0;
1572}
1573
1574/*
1575 * The NCR PQS and PDS cards are constructed as a DEC bridge
1576 * behind which sits a proprietary NCR memory controller and
1577 * either four or two 53c875s as separate devices.  We can tell
1578 * if an 875 is part of a PQS/PDS or not since if it is, it will
1579 * be on the same bus as the memory controller.  In its usual
1580 * mode of operation, the 875s are slaved to the memory
1581 * controller for all transfers.  To operate with the Linux
1582 * driver, the memory controller is disabled and the 875s
1583 * freed to function independently.  The only wrinkle is that
1584 * the preset SCSI ID (which may be zero) must be read in from
1585 * a special configuration space register of the 875.
1586 */
1587static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1588{
1589        int slot;
1590        u8 tmp;
1591
1592        for (slot = 0; slot < 256; slot++) {
1593                struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1594
1595                if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1596                        pci_dev_put(memc);
1597                        continue;
1598                }
1599
1600                /* bit 1: allow individual 875 configuration */
1601                pci_read_config_byte(memc, 0x44, &tmp);
1602                if ((tmp & 0x2) == 0) {
1603                        tmp |= 0x2;
1604                        pci_write_config_byte(memc, 0x44, tmp);
1605                }
1606
1607                /* bit 2: drive individual 875 interrupts to the bus */
1608                pci_read_config_byte(memc, 0x45, &tmp);
1609                if ((tmp & 0x4) == 0) {
1610                        tmp |= 0x4;
1611                        pci_write_config_byte(memc, 0x45, tmp);
1612                }
1613
1614                pci_dev_put(memc);
1615                break;
1616        }
1617
1618        pci_read_config_byte(pdev, 0x84, &tmp);
1619        sym_dev->host_id = tmp;
1620}
1621
1622/*
1623 *  Called before unloading the module.
1624 *  Detach the host.
1625 *  We have to free resources and halt the NCR chip.
1626 */
1627static int sym_detach(struct Scsi_Host *shost, struct pci_dev *pdev)
1628{
1629        struct sym_hcb *np = sym_get_hcb(shost);
1630        printk("%s: detaching ...\n", sym_name(np));
1631
1632        del_timer_sync(&np->s.timer);
1633
1634        /*
1635         * Reset NCR chip.
1636         * We should use sym_soft_reset(), but we don't want to do 
1637         * so, since we may not be safe if interrupts occur.
1638         */
1639        printk("%s: resetting chip\n", sym_name(np));
1640        OUTB(np, nc_istat, SRST);
1641        INB(np, nc_mbox1);
1642        udelay(10);
1643        OUTB(np, nc_istat, 0);
1644
1645        sym_free_resources(np, pdev, 1);
1646        scsi_host_put(shost);
1647
1648        return 1;
1649}
1650
1651/*
1652 * Driver host template.
1653 */
1654static struct scsi_host_template sym2_template = {
1655        .module                 = THIS_MODULE,
1656        .name                   = "sym53c8xx",
1657        .info                   = sym53c8xx_info, 
1658        .queuecommand           = sym53c8xx_queue_command,
1659        .slave_alloc            = sym53c8xx_slave_alloc,
1660        .slave_configure        = sym53c8xx_slave_configure,
1661        .slave_destroy          = sym53c8xx_slave_destroy,
1662        .eh_abort_handler       = sym53c8xx_eh_abort_handler,
1663        .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1664        .eh_bus_reset_handler   = sym53c8xx_eh_bus_reset_handler,
1665        .eh_host_reset_handler  = sym53c8xx_eh_host_reset_handler,
1666        .this_id                = 7,
1667        .use_clustering         = ENABLE_CLUSTERING,
1668        .max_sectors            = 0xFFFF,
1669#ifdef SYM_LINUX_PROC_INFO_SUPPORT
1670        .show_info              = sym_show_info,
1671#ifdef  SYM_LINUX_USER_COMMAND_SUPPORT
1672        .write_info             = sym_user_command,
1673#endif
1674        .proc_name              = NAME53C8XX,
1675#endif
1676};
1677
1678static int attach_count;
1679
1680static int sym2_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1681{
1682        struct sym_device sym_dev;
1683        struct sym_nvram nvram;
1684        struct Scsi_Host *shost;
1685        int do_iounmap = 0;
1686        int do_disable_device = 1;
1687
1688        memset(&sym_dev, 0, sizeof(sym_dev));
1689        memset(&nvram, 0, sizeof(nvram));
1690        sym_dev.pdev = pdev;
1691        sym_dev.host_id = SYM_SETUP_HOST_ID;
1692
1693        if (pci_enable_device(pdev))
1694                goto leave;
1695
1696        pci_set_master(pdev);
1697
1698        if (pci_request_regions(pdev, NAME53C8XX))
1699                goto disable;
1700
1701        if (sym_check_supported(&sym_dev))
1702                goto free;
1703
1704        if (sym_iomap_device(&sym_dev))
1705                goto free;
1706        do_iounmap = 1;
1707
1708        if (sym_check_raid(&sym_dev)) {
1709                do_disable_device = 0;  /* Don't disable the device */
1710                goto free;
1711        }
1712
1713        if (sym_set_workarounds(&sym_dev))
1714                goto free;
1715
1716        sym_config_pqs(pdev, &sym_dev);
1717
1718        sym_get_nvram(&sym_dev, &nvram);
1719
1720        do_iounmap = 0; /* Don't sym_iounmap_device() after sym_attach(). */
1721        shost = sym_attach(&sym2_template, attach_count, &sym_dev);
1722        if (!shost)
1723                goto free;
1724
1725        if (scsi_add_host(shost, &pdev->dev))
1726                goto detach;
1727        scsi_scan_host(shost);
1728
1729        attach_count++;
1730
1731        return 0;
1732
1733 detach:
1734        sym_detach(pci_get_drvdata(pdev), pdev);
1735 free:
1736        if (do_iounmap)
1737                sym_iounmap_device(&sym_dev);
1738        pci_release_regions(pdev);
1739 disable:
1740        if (do_disable_device)
1741                pci_disable_device(pdev);
1742 leave:
1743        return -ENODEV;
1744}
1745
1746static void sym2_remove(struct pci_dev *pdev)
1747{
1748        struct Scsi_Host *shost = pci_get_drvdata(pdev);
1749
1750        scsi_remove_host(shost);
1751        sym_detach(shost, pdev);
1752        pci_release_regions(pdev);
1753        pci_disable_device(pdev);
1754
1755        attach_count--;
1756}
1757
1758/**
1759 * sym2_io_error_detected() - called when PCI error is detected
1760 * @pdev: pointer to PCI device
1761 * @state: current state of the PCI slot
1762 */
1763static pci_ers_result_t sym2_io_error_detected(struct pci_dev *pdev,
1764                                         enum pci_channel_state state)
1765{
1766        /* If slot is permanently frozen, turn everything off */
1767        if (state == pci_channel_io_perm_failure) {
1768                sym2_remove(pdev);
1769                return PCI_ERS_RESULT_DISCONNECT;
1770        }
1771
1772        disable_irq(pdev->irq);
1773        pci_disable_device(pdev);
1774
1775        /* Request that MMIO be enabled, so register dump can be taken. */
1776        return PCI_ERS_RESULT_CAN_RECOVER;
1777}
1778
1779/**
1780 * sym2_io_slot_dump - Enable MMIO and dump debug registers
1781 * @pdev: pointer to PCI device
1782 */
1783static pci_ers_result_t sym2_io_slot_dump(struct pci_dev *pdev)
1784{
1785        struct Scsi_Host *shost = pci_get_drvdata(pdev);
1786
1787        sym_dump_registers(shost);
1788
1789        /* Request a slot reset. */
1790        return PCI_ERS_RESULT_NEED_RESET;
1791}
1792
1793/**
1794 * sym2_reset_workarounds - hardware-specific work-arounds
1795 *
1796 * This routine is similar to sym_set_workarounds(), except
1797 * that, at this point, we already know that the device was
1798 * successfully initialized at least once before, and so most
1799 * of the steps taken there are un-needed here.
1800 */
1801static void sym2_reset_workarounds(struct pci_dev *pdev)
1802{
1803        u_short status_reg;
1804        struct sym_chip *chip;
1805
1806        chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1807
1808        /* Work around for errant bit in 895A, in a fashion
1809         * similar to what is done in sym_set_workarounds().
1810         */
1811        pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1812        if (!(chip->features & FE_66MHZ) && (status_reg & PCI_STATUS_66MHZ)) {
1813                status_reg = PCI_STATUS_66MHZ;
1814                pci_write_config_word(pdev, PCI_STATUS, status_reg);
1815                pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1816        }
1817}
1818
1819/**
1820 * sym2_io_slot_reset() - called when the pci bus has been reset.
1821 * @pdev: pointer to PCI device
1822 *
1823 * Restart the card from scratch.
1824 */
1825static pci_ers_result_t sym2_io_slot_reset(struct pci_dev *pdev)
1826{
1827        struct Scsi_Host *shost = pci_get_drvdata(pdev);
1828        struct sym_hcb *np = sym_get_hcb(shost);
1829
1830        printk(KERN_INFO "%s: recovering from a PCI slot reset\n",
1831                  sym_name(np));
1832
1833        if (pci_enable_device(pdev)) {
1834                printk(KERN_ERR "%s: Unable to enable after PCI reset\n",
1835                        sym_name(np));
1836                return PCI_ERS_RESULT_DISCONNECT;
1837        }
1838
1839        pci_set_master(pdev);
1840        enable_irq(pdev->irq);
1841
1842        /* If the chip can do Memory Write Invalidate, enable it */
1843        if (np->features & FE_WRIE) {
1844                if (pci_set_mwi(pdev))
1845                        return PCI_ERS_RESULT_DISCONNECT;
1846        }
1847
1848        /* Perform work-arounds, analogous to sym_set_workarounds() */
1849        sym2_reset_workarounds(pdev);
1850
1851        /* Perform host reset only on one instance of the card */
1852        if (PCI_FUNC(pdev->devfn) == 0) {
1853                if (sym_reset_scsi_bus(np, 0)) {
1854                        printk(KERN_ERR "%s: Unable to reset scsi host\n",
1855                                sym_name(np));
1856                        return PCI_ERS_RESULT_DISCONNECT;
1857                }
1858                sym_start_up(shost, 1);
1859        }
1860
1861        return PCI_ERS_RESULT_RECOVERED;
1862}
1863
1864/**
1865 * sym2_io_resume() - resume normal ops after PCI reset
1866 * @pdev: pointer to PCI device
1867 *
1868 * Called when the error recovery driver tells us that its
1869 * OK to resume normal operation. Use completion to allow
1870 * halted scsi ops to resume.
1871 */
1872static void sym2_io_resume(struct pci_dev *pdev)
1873{
1874        struct Scsi_Host *shost = pci_get_drvdata(pdev);
1875        struct sym_data *sym_data = shost_priv(shost);
1876
1877        spin_lock_irq(shost->host_lock);
1878        if (sym_data->io_reset)
1879                complete_all(sym_data->io_reset);
1880        spin_unlock_irq(shost->host_lock);
1881}
1882
1883static void sym2_get_signalling(struct Scsi_Host *shost)
1884{
1885        struct sym_hcb *np = sym_get_hcb(shost);
1886        enum spi_signal_type type;
1887
1888        switch (np->scsi_mode) {
1889        case SMODE_SE:
1890                type = SPI_SIGNAL_SE;
1891                break;
1892        case SMODE_LVD:
1893                type = SPI_SIGNAL_LVD;
1894                break;
1895        case SMODE_HVD:
1896                type = SPI_SIGNAL_HVD;
1897                break;
1898        default:
1899                type = SPI_SIGNAL_UNKNOWN;
1900                break;
1901        }
1902        spi_signalling(shost) = type;
1903}
1904
1905static void sym2_set_offset(struct scsi_target *starget, int offset)
1906{
1907        struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1908        struct sym_hcb *np = sym_get_hcb(shost);
1909        struct sym_tcb *tp = &np->target[starget->id];
1910
1911        tp->tgoal.offset = offset;
1912        tp->tgoal.check_nego = 1;
1913}
1914
1915static void sym2_set_period(struct scsi_target *starget, int period)
1916{
1917        struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1918        struct sym_hcb *np = sym_get_hcb(shost);
1919        struct sym_tcb *tp = &np->target[starget->id];
1920
1921        /* have to have DT for these transfers, but DT will also
1922         * set width, so check that this is allowed */
1923        if (period <= np->minsync && spi_width(starget))
1924                tp->tgoal.dt = 1;
1925
1926        tp->tgoal.period = period;
1927        tp->tgoal.check_nego = 1;
1928}
1929
1930static void sym2_set_width(struct scsi_target *starget, int width)
1931{
1932        struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1933        struct sym_hcb *np = sym_get_hcb(shost);
1934        struct sym_tcb *tp = &np->target[starget->id];
1935
1936        /* It is illegal to have DT set on narrow transfers.  If DT is
1937         * clear, we must also clear IU and QAS.  */
1938        if (width == 0)
1939                tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1940
1941        tp->tgoal.width = width;
1942        tp->tgoal.check_nego = 1;
1943}
1944
1945static void sym2_set_dt(struct scsi_target *starget, int dt)
1946{
1947        struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1948        struct sym_hcb *np = sym_get_hcb(shost);
1949        struct sym_tcb *tp = &np->target[starget->id];
1950
1951        /* We must clear QAS and IU if DT is clear */
1952        if (dt)
1953                tp->tgoal.dt = 1;
1954        else
1955                tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1956        tp->tgoal.check_nego = 1;
1957}
1958
1959#if 0
1960static void sym2_set_iu(struct scsi_target *starget, int iu)
1961{
1962        struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1963        struct sym_hcb *np = sym_get_hcb(shost);
1964        struct sym_tcb *tp = &np->target[starget->id];
1965
1966        if (iu)
1967                tp->tgoal.iu = tp->tgoal.dt = 1;
1968        else
1969                tp->tgoal.iu = 0;
1970        tp->tgoal.check_nego = 1;
1971}
1972
1973static void sym2_set_qas(struct scsi_target *starget, int qas)
1974{
1975        struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1976        struct sym_hcb *np = sym_get_hcb(shost);
1977        struct sym_tcb *tp = &np->target[starget->id];
1978
1979        if (qas)
1980                tp->tgoal.dt = tp->tgoal.qas = 1;
1981        else
1982                tp->tgoal.qas = 0;
1983        tp->tgoal.check_nego = 1;
1984}
1985#endif
1986
1987static struct spi_function_template sym2_transport_functions = {
1988        .set_offset     = sym2_set_offset,
1989        .show_offset    = 1,
1990        .set_period     = sym2_set_period,
1991        .show_period    = 1,
1992        .set_width      = sym2_set_width,
1993        .show_width     = 1,
1994        .set_dt         = sym2_set_dt,
1995        .show_dt        = 1,
1996#if 0
1997        .set_iu         = sym2_set_iu,
1998        .show_iu        = 1,
1999        .set_qas        = sym2_set_qas,
2000        .show_qas       = 1,
2001#endif
2002        .get_signalling = sym2_get_signalling,
2003};
2004
2005static struct pci_device_id sym2_id_table[] = {
2006        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2007          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2008        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2009          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2010        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2011          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2012        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2013          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2014        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2015          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2016        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2017          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2018        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2019          PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL },
2020        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2021          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2022        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2023          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2024        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2025          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2026        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2027          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2028        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2029          PCI_ANY_ID, PCI_ANY_ID,  PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL }, /* new */
2030        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2031          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2032        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2033          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2034        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2035          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2036        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2037          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2038        { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2039          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2040        { 0, }
2041};
2042
2043MODULE_DEVICE_TABLE(pci, sym2_id_table);
2044
2045static const struct pci_error_handlers sym2_err_handler = {
2046        .error_detected = sym2_io_error_detected,
2047        .mmio_enabled   = sym2_io_slot_dump,
2048        .slot_reset     = sym2_io_slot_reset,
2049        .resume         = sym2_io_resume,
2050};
2051
2052static struct pci_driver sym2_driver = {
2053        .name           = NAME53C8XX,
2054        .id_table       = sym2_id_table,
2055        .probe          = sym2_probe,
2056        .remove         = sym2_remove,
2057        .err_handler    = &sym2_err_handler,
2058};
2059
2060static int __init sym2_init(void)
2061{
2062        int error;
2063
2064        sym2_setup_params();
2065        sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2066        if (!sym2_transport_template)
2067                return -ENODEV;
2068
2069        error = pci_register_driver(&sym2_driver);
2070        if (error)
2071                spi_release_transport(sym2_transport_template);
2072        return error;
2073}
2074
2075static void __exit sym2_exit(void)
2076{
2077        pci_unregister_driver(&sym2_driver);
2078        spi_release_transport(sym2_transport_template);
2079}
2080
2081module_init(sym2_init);
2082module_exit(sym2_exit);
2083