Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
[linux-2.6] / 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/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
56 struct sym_driver_setup sym_driver_setup = SYM_LINUX_DRIVER_SETUP;
57 unsigned int sym_debug_flags = 0;
58
59 static char *excl_string;
60 static char *safe_string;
61 module_param_named(cmd_per_lun, sym_driver_setup.max_tag, ushort, 0);
62 module_param_named(burst, sym_driver_setup.burst_order, byte, 0);
63 module_param_named(led, sym_driver_setup.scsi_led, byte, 0);
64 module_param_named(diff, sym_driver_setup.scsi_diff, byte, 0);
65 module_param_named(irqm, sym_driver_setup.irq_mode, byte, 0);
66 module_param_named(buschk, sym_driver_setup.scsi_bus_check, byte, 0);
67 module_param_named(hostid, sym_driver_setup.host_id, byte, 0);
68 module_param_named(verb, sym_driver_setup.verbose, byte, 0);
69 module_param_named(debug, sym_debug_flags, uint, 0);
70 module_param_named(settle, sym_driver_setup.settle_delay, byte, 0);
71 module_param_named(nvram, sym_driver_setup.use_nvram, byte, 0);
72 module_param_named(excl, excl_string, charp, 0);
73 module_param_named(safe, safe_string, charp, 0);
74
75 MODULE_PARM_DESC(cmd_per_lun, "The maximum number of tags to use by default");
76 MODULE_PARM_DESC(burst, "Maximum burst.  0 to disable, 255 to read from registers");
77 MODULE_PARM_DESC(led, "Set to 1 to enable LED support");
78 MODULE_PARM_DESC(diff, "0 for no differential mode, 1 for BIOS, 2 for always, 3 for not GPIO3");
79 MODULE_PARM_DESC(irqm, "0 for open drain, 1 to leave alone, 2 for totem pole");
80 MODULE_PARM_DESC(buschk, "0 to not check, 1 for detach on error, 2 for warn on error");
81 MODULE_PARM_DESC(hostid, "The SCSI ID to use for the host adapters");
82 MODULE_PARM_DESC(verb, "0 for minimal verbosity, 1 for normal, 2 for excessive");
83 MODULE_PARM_DESC(debug, "Set bits to enable debugging");
84 MODULE_PARM_DESC(settle, "Settle delay in seconds.  Default 3");
85 MODULE_PARM_DESC(nvram, "Option currently not used");
86 MODULE_PARM_DESC(excl, "List ioport addresses here to prevent controllers from being attached");
87 MODULE_PARM_DESC(safe, "Set other settings to a \"safe mode\"");
88
89 MODULE_LICENSE("GPL");
90 MODULE_VERSION(SYM_VERSION);
91 MODULE_AUTHOR("Matthew Wilcox <matthew@wil.cx>");
92 MODULE_DESCRIPTION("NCR, Symbios and LSI 8xx and 1010 PCI SCSI adapters");
93
94 static 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
125 static struct scsi_transport_template *sym2_transport_template = NULL;
126
127 /*
128  *  Driver private area in the SCSI command structure.
129  */
130 struct 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  */
140 void 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  */
155 void 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  */
169 static 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  */
187 void 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
258 static 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  */
300 static 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  */
332 static 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  */
345 int 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
430 out_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  */
443 static 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  */
491 void 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  */
508 static int sym53c8xx_queue_command(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->timeout_per_command) {
523                 unsigned long tlimit = jiffies + cmd->timeout_per_command;
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
539 /*
540  *  Linux entry point of the interrupt handler.
541  */
542 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id)
543 {
544         struct Scsi_Host *shost = dev_id;
545         struct sym_data *sym_data = shost_priv(shost);
546         irqreturn_t result;
547
548         /* Avoid spinloop trying to handle interrupts on frozen device */
549         if (pci_channel_offline(sym_data->pdev))
550                 return IRQ_NONE;
551
552         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
553
554         spin_lock(shost->host_lock);
555         result = sym_interrupt(shost);
556         spin_unlock(shost->host_lock);
557
558         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
559
560         return result;
561 }
562
563 /*
564  *  Linux entry point of the timer handler
565  */
566 static void sym53c8xx_timer(unsigned long npref)
567 {
568         struct sym_hcb *np = (struct sym_hcb *)npref;
569         unsigned long flags;
570
571         spin_lock_irqsave(np->s.host->host_lock, flags);
572         sym_timer(np);
573         spin_unlock_irqrestore(np->s.host->host_lock, flags);
574 }
575
576
577 /*
578  *  What the eh thread wants us to perform.
579  */
580 #define SYM_EH_ABORT            0
581 #define SYM_EH_DEVICE_RESET     1
582 #define SYM_EH_BUS_RESET        2
583 #define SYM_EH_HOST_RESET       3
584
585 /*
586  *  Generic method for our eh processing.
587  *  The 'op' argument tells what we have to do.
588  */
589 static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
590 {
591         struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
592         struct Scsi_Host *shost = cmd->device->host;
593         struct sym_data *sym_data = shost_priv(shost);
594         struct pci_dev *pdev = sym_data->pdev;
595         struct sym_hcb *np = sym_data->ncb;
596         SYM_QUEHEAD *qp;
597         int cmd_queued = 0;
598         int sts = -1;
599         struct completion eh_done;
600
601         scmd_printk(KERN_WARNING, cmd, "%s operation started\n", opname);
602
603         /* We may be in an error condition because the PCI bus
604          * went down. In this case, we need to wait until the
605          * PCI bus is reset, the card is reset, and only then
606          * proceed with the scsi error recovery.  There's no
607          * point in hurrying; take a leisurely wait.
608          */
609 #define WAIT_FOR_PCI_RECOVERY   35
610         if (pci_channel_offline(pdev)) {
611                 int finished_reset = 0;
612                 init_completion(&eh_done);
613                 spin_lock_irq(shost->host_lock);
614                 /* Make sure we didn't race */
615                 if (pci_channel_offline(pdev)) {
616                         BUG_ON(sym_data->io_reset);
617                         sym_data->io_reset = &eh_done;
618                 } else {
619                         finished_reset = 1;
620                 }
621                 spin_unlock_irq(shost->host_lock);
622                 if (!finished_reset)
623                         finished_reset = wait_for_completion_timeout
624                                                 (sym_data->io_reset,
625                                                 WAIT_FOR_PCI_RECOVERY*HZ);
626                 spin_lock_irq(shost->host_lock);
627                 sym_data->io_reset = NULL;
628                 spin_unlock_irq(shost->host_lock);
629                 if (!finished_reset)
630                         return SCSI_FAILED;
631         }
632
633         spin_lock_irq(shost->host_lock);
634         /* This one is queued in some place -> to wait for completion */
635         FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
636                 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
637                 if (cp->cmd == cmd) {
638                         cmd_queued = 1;
639                         break;
640                 }
641         }
642
643         /* Try to proceed the operation we have been asked for */
644         sts = -1;
645         switch(op) {
646         case SYM_EH_ABORT:
647                 sts = sym_abort_scsiio(np, cmd, 1);
648                 break;
649         case SYM_EH_DEVICE_RESET:
650                 sts = sym_reset_scsi_target(np, cmd->device->id);
651                 break;
652         case SYM_EH_BUS_RESET:
653                 sym_reset_scsi_bus(np, 1);
654                 sts = 0;
655                 break;
656         case SYM_EH_HOST_RESET:
657                 sym_reset_scsi_bus(np, 0);
658                 sym_start_up(shost, 1);
659                 sts = 0;
660                 break;
661         default:
662                 break;
663         }
664
665         /* On error, restore everything and cross fingers :) */
666         if (sts)
667                 cmd_queued = 0;
668
669         if (cmd_queued) {
670                 init_completion(&eh_done);
671                 ucmd->eh_done = &eh_done;
672                 spin_unlock_irq(shost->host_lock);
673                 if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
674                         ucmd->eh_done = NULL;
675                         sts = -2;
676                 }
677         } else {
678                 spin_unlock_irq(shost->host_lock);
679         }
680
681         dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
682                         sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
683         return sts ? SCSI_FAILED : SCSI_SUCCESS;
684 }
685
686
687 /*
688  * Error handlers called from the eh thread (one thread per HBA).
689  */
690 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
691 {
692         return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
693 }
694
695 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
696 {
697         return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
698 }
699
700 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
701 {
702         return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
703 }
704
705 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
706 {
707         return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
708 }
709
710 /*
711  *  Tune device queuing depth, according to various limits.
712  */
713 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
714 {
715         struct sym_lcb *lp = sym_lp(tp, lun);
716         u_short oldtags;
717
718         if (!lp)
719                 return;
720
721         oldtags = lp->s.reqtags;
722
723         if (reqtags > lp->s.scdev_depth)
724                 reqtags = lp->s.scdev_depth;
725
726         lp->s.reqtags     = reqtags;
727
728         if (reqtags != oldtags) {
729                 dev_info(&tp->starget->dev,
730                          "tagged command queuing %s, command queue depth %d.\n",
731                           lp->s.reqtags ? "enabled" : "disabled", reqtags);
732         }
733 }
734
735 static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
736 {
737         struct sym_hcb *np = sym_get_hcb(sdev->host);
738         struct sym_tcb *tp = &np->target[sdev->id];
739         struct sym_lcb *lp;
740
741         if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
742                 return -ENXIO;
743
744         tp->starget = sdev->sdev_target;
745         /*
746          * Fail the device init if the device is flagged NOSCAN at BOOT in
747          * the NVRAM.  This may speed up boot and maintain coherency with
748          * BIOS device numbering.  Clearing the flag allows the user to
749          * rescan skipped devices later.  We also return an error for
750          * devices not flagged for SCAN LUNS in the NVRAM since some single
751          * lun devices behave badly when asked for a non zero LUN.
752          */
753
754         if (tp->usrflags & SYM_SCAN_BOOT_DISABLED) {
755                 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
756                 starget_printk(KERN_INFO, tp->starget,
757                                 "Scan at boot disabled in NVRAM\n");
758                 return -ENXIO;
759         }
760
761         if (tp->usrflags & SYM_SCAN_LUNS_DISABLED) {
762                 if (sdev->lun != 0)
763                         return -ENXIO;
764                 starget_printk(KERN_INFO, tp->starget,
765                                 "Multiple LUNs disabled in NVRAM\n");
766         }
767
768         lp = sym_alloc_lcb(np, sdev->id, sdev->lun);
769         if (!lp)
770                 return -ENOMEM;
771
772         spi_min_period(tp->starget) = tp->usr_period;
773         spi_max_width(tp->starget) = tp->usr_width;
774
775         return 0;
776 }
777
778 /*
779  * Linux entry point for device queue sizing.
780  */
781 static int sym53c8xx_slave_configure(struct scsi_device *sdev)
782 {
783         struct sym_hcb *np = sym_get_hcb(sdev->host);
784         struct sym_tcb *tp = &np->target[sdev->id];
785         struct sym_lcb *lp = sym_lp(tp, sdev->lun);
786         int reqtags, depth_to_use;
787
788         /*
789          *  Get user flags.
790          */
791         lp->curr_flags = lp->user_flags;
792
793         /*
794          *  Select queue depth from driver setup.
795          *  Donnot use more than configured by user.
796          *  Use at least 2.
797          *  Donnot use more than our maximum.
798          */
799         reqtags = sym_driver_setup.max_tag;
800         if (reqtags > tp->usrtags)
801                 reqtags = tp->usrtags;
802         if (!sdev->tagged_supported)
803                 reqtags = 0;
804         if (reqtags > SYM_CONF_MAX_TAG)
805                 reqtags = SYM_CONF_MAX_TAG;
806         depth_to_use = reqtags ? reqtags : 2;
807         scsi_adjust_queue_depth(sdev,
808                                 sdev->tagged_supported ? MSG_SIMPLE_TAG : 0,
809                                 depth_to_use);
810         lp->s.scdev_depth = depth_to_use;
811         sym_tune_dev_queuing(tp, sdev->lun, reqtags);
812
813         if (!spi_initial_dv(sdev->sdev_target))
814                 spi_dv_device(sdev);
815
816         return 0;
817 }
818
819 static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
820 {
821         struct sym_hcb *np = sym_get_hcb(sdev->host);
822         struct sym_lcb *lp = sym_lp(&np->target[sdev->id], sdev->lun);
823
824         if (lp->itlq_tbl)
825                 sym_mfree_dma(lp->itlq_tbl, SYM_CONF_MAX_TASK * 4, "ITLQ_TBL");
826         kfree(lp->cb_tags);
827         sym_mfree_dma(lp, sizeof(*lp), "LCB");
828 }
829
830 /*
831  *  Linux entry point for info() function
832  */
833 static const char *sym53c8xx_info (struct Scsi_Host *host)
834 {
835         return SYM_DRIVER_NAME;
836 }
837
838
839 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
840 /*
841  *  Proc file system stuff
842  *
843  *  A read operation returns adapter information.
844  *  A write operation is a control command.
845  *  The string is parsed in the driver code and the command is passed 
846  *  to the sym_usercmd() function.
847  */
848
849 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
850
851 struct  sym_usrcmd {
852         u_long  target;
853         u_long  lun;
854         u_long  data;
855         u_long  cmd;
856 };
857
858 #define UC_SETSYNC      10
859 #define UC_SETTAGS      11
860 #define UC_SETDEBUG     12
861 #define UC_SETWIDE      14
862 #define UC_SETFLAG      15
863 #define UC_SETVERBOSE   17
864 #define UC_RESETDEV     18
865 #define UC_CLEARDEV     19
866
867 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
868 {
869         struct sym_tcb *tp;
870         int t, l;
871
872         switch (uc->cmd) {
873         case 0: return;
874
875 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
876         case UC_SETDEBUG:
877                 sym_debug_flags = uc->data;
878                 break;
879 #endif
880         case UC_SETVERBOSE:
881                 np->verbose = uc->data;
882                 break;
883         default:
884                 /*
885                  * We assume that other commands apply to targets.
886                  * This should always be the case and avoid the below 
887                  * 4 lines to be repeated 6 times.
888                  */
889                 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
890                         if (!((uc->target >> t) & 1))
891                                 continue;
892                         tp = &np->target[t];
893
894                         switch (uc->cmd) {
895
896                         case UC_SETSYNC:
897                                 if (!uc->data || uc->data >= 255) {
898                                         tp->tgoal.iu = tp->tgoal.dt =
899                                                 tp->tgoal.qas = 0;
900                                         tp->tgoal.offset = 0;
901                                 } else if (uc->data <= 9 && np->minsync_dt) {
902                                         if (uc->data < np->minsync_dt)
903                                                 uc->data = np->minsync_dt;
904                                         tp->tgoal.iu = tp->tgoal.dt =
905                                                 tp->tgoal.qas = 1;
906                                         tp->tgoal.width = 1;
907                                         tp->tgoal.period = uc->data;
908                                         tp->tgoal.offset = np->maxoffs_dt;
909                                 } else {
910                                         if (uc->data < np->minsync)
911                                                 uc->data = np->minsync;
912                                         tp->tgoal.iu = tp->tgoal.dt =
913                                                 tp->tgoal.qas = 0;
914                                         tp->tgoal.period = uc->data;
915                                         tp->tgoal.offset = np->maxoffs;
916                                 }
917                                 tp->tgoal.check_nego = 1;
918                                 break;
919                         case UC_SETWIDE:
920                                 tp->tgoal.width = uc->data ? 1 : 0;
921                                 tp->tgoal.check_nego = 1;
922                                 break;
923                         case UC_SETTAGS:
924                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
925                                         sym_tune_dev_queuing(tp, l, uc->data);
926                                 break;
927                         case UC_RESETDEV:
928                                 tp->to_reset = 1;
929                                 np->istat_sem = SEM;
930                                 OUTB(np, nc_istat, SIGP|SEM);
931                                 break;
932                         case UC_CLEARDEV:
933                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
934                                         struct sym_lcb *lp = sym_lp(tp, l);
935                                         if (lp) lp->to_clear = 1;
936                                 }
937                                 np->istat_sem = SEM;
938                                 OUTB(np, nc_istat, SIGP|SEM);
939                                 break;
940                         case UC_SETFLAG:
941                                 tp->usrflags = uc->data;
942                                 break;
943                         }
944                 }
945                 break;
946         }
947 }
948
949 static int skip_spaces(char *ptr, int len)
950 {
951         int cnt, c;
952
953         for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
954
955         return (len - cnt);
956 }
957
958 static int get_int_arg(char *ptr, int len, u_long *pv)
959 {
960         char *end;
961
962         *pv = simple_strtoul(ptr, &end, 10);
963         return (end - ptr);
964 }
965
966 static int is_keyword(char *ptr, int len, char *verb)
967 {
968         int verb_len = strlen(verb);
969
970         if (len >= verb_len && !memcmp(verb, ptr, verb_len))
971                 return verb_len;
972         else
973                 return 0;
974 }
975
976 #define SKIP_SPACES(ptr, len)                                           \
977         if ((arg_len = skip_spaces(ptr, len)) < 1)                      \
978                 return -EINVAL;                                         \
979         ptr += arg_len; len -= arg_len;
980
981 #define GET_INT_ARG(ptr, len, v)                                        \
982         if (!(arg_len = get_int_arg(ptr, len, &(v))))                   \
983                 return -EINVAL;                                         \
984         ptr += arg_len; len -= arg_len;
985
986
987 /*
988  * Parse a control command
989  */
990
991 static int sym_user_command(struct Scsi_Host *shost, char *buffer, int length)
992 {
993         struct sym_hcb *np = sym_get_hcb(shost);
994         char *ptr       = buffer;
995         int len         = length;
996         struct sym_usrcmd cmd, *uc = &cmd;
997         int             arg_len;
998         u_long          target;
999
1000         memset(uc, 0, sizeof(*uc));
1001
1002         if (len > 0 && ptr[len-1] == '\n')
1003                 --len;
1004
1005         if      ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1006                 uc->cmd = UC_SETSYNC;
1007         else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1008                 uc->cmd = UC_SETTAGS;
1009         else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1010                 uc->cmd = UC_SETVERBOSE;
1011         else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1012                 uc->cmd = UC_SETWIDE;
1013 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1014         else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1015                 uc->cmd = UC_SETDEBUG;
1016 #endif
1017         else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1018                 uc->cmd = UC_SETFLAG;
1019         else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1020                 uc->cmd = UC_RESETDEV;
1021         else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1022                 uc->cmd = UC_CLEARDEV;
1023         else
1024                 arg_len = 0;
1025
1026 #ifdef DEBUG_PROC_INFO
1027 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1028 #endif
1029
1030         if (!arg_len)
1031                 return -EINVAL;
1032         ptr += arg_len; len -= arg_len;
1033
1034         switch(uc->cmd) {
1035         case UC_SETSYNC:
1036         case UC_SETTAGS:
1037         case UC_SETWIDE:
1038         case UC_SETFLAG:
1039         case UC_RESETDEV:
1040         case UC_CLEARDEV:
1041                 SKIP_SPACES(ptr, len);
1042                 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1043                         ptr += arg_len; len -= arg_len;
1044                         uc->target = ~0;
1045                 } else {
1046                         GET_INT_ARG(ptr, len, target);
1047                         uc->target = (1<<target);
1048 #ifdef DEBUG_PROC_INFO
1049 printk("sym_user_command: target=%ld\n", target);
1050 #endif
1051                 }
1052                 break;
1053         }
1054
1055         switch(uc->cmd) {
1056         case UC_SETVERBOSE:
1057         case UC_SETSYNC:
1058         case UC_SETTAGS:
1059         case UC_SETWIDE:
1060                 SKIP_SPACES(ptr, len);
1061                 GET_INT_ARG(ptr, len, uc->data);
1062 #ifdef DEBUG_PROC_INFO
1063 printk("sym_user_command: data=%ld\n", uc->data);
1064 #endif
1065                 break;
1066 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1067         case UC_SETDEBUG:
1068                 while (len > 0) {
1069                         SKIP_SPACES(ptr, len);
1070                         if      ((arg_len = is_keyword(ptr, len, "alloc")))
1071                                 uc->data |= DEBUG_ALLOC;
1072                         else if ((arg_len = is_keyword(ptr, len, "phase")))
1073                                 uc->data |= DEBUG_PHASE;
1074                         else if ((arg_len = is_keyword(ptr, len, "queue")))
1075                                 uc->data |= DEBUG_QUEUE;
1076                         else if ((arg_len = is_keyword(ptr, len, "result")))
1077                                 uc->data |= DEBUG_RESULT;
1078                         else if ((arg_len = is_keyword(ptr, len, "scatter")))
1079                                 uc->data |= DEBUG_SCATTER;
1080                         else if ((arg_len = is_keyword(ptr, len, "script")))
1081                                 uc->data |= DEBUG_SCRIPT;
1082                         else if ((arg_len = is_keyword(ptr, len, "tiny")))
1083                                 uc->data |= DEBUG_TINY;
1084                         else if ((arg_len = is_keyword(ptr, len, "timing")))
1085                                 uc->data |= DEBUG_TIMING;
1086                         else if ((arg_len = is_keyword(ptr, len, "nego")))
1087                                 uc->data |= DEBUG_NEGO;
1088                         else if ((arg_len = is_keyword(ptr, len, "tags")))
1089                                 uc->data |= DEBUG_TAGS;
1090                         else if ((arg_len = is_keyword(ptr, len, "pointer")))
1091                                 uc->data |= DEBUG_POINTER;
1092                         else
1093                                 return -EINVAL;
1094                         ptr += arg_len; len -= arg_len;
1095                 }
1096 #ifdef DEBUG_PROC_INFO
1097 printk("sym_user_command: data=%ld\n", uc->data);
1098 #endif
1099                 break;
1100 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1101         case UC_SETFLAG:
1102                 while (len > 0) {
1103                         SKIP_SPACES(ptr, len);
1104                         if      ((arg_len = is_keyword(ptr, len, "no_disc")))
1105                                 uc->data &= ~SYM_DISC_ENABLED;
1106                         else
1107                                 return -EINVAL;
1108                         ptr += arg_len; len -= arg_len;
1109                 }
1110                 break;
1111         default:
1112                 break;
1113         }
1114
1115         if (len)
1116                 return -EINVAL;
1117         else {
1118                 unsigned long flags;
1119
1120                 spin_lock_irqsave(shost->host_lock, flags);
1121                 sym_exec_user_command(np, uc);
1122                 spin_unlock_irqrestore(shost->host_lock, flags);
1123         }
1124         return length;
1125 }
1126
1127 #endif  /* SYM_LINUX_USER_COMMAND_SUPPORT */
1128
1129
1130 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1131 /*
1132  *  Informations through the proc file system.
1133  */
1134 struct info_str {
1135         char *buffer;
1136         int length;
1137         int offset;
1138         int pos;
1139 };
1140
1141 static void copy_mem_info(struct info_str *info, char *data, int len)
1142 {
1143         if (info->pos + len > info->length)
1144                 len = info->length - info->pos;
1145
1146         if (info->pos + len < info->offset) {
1147                 info->pos += len;
1148                 return;
1149         }
1150         if (info->pos < info->offset) {
1151                 data += (info->offset - info->pos);
1152                 len  -= (info->offset - info->pos);
1153         }
1154
1155         if (len > 0) {
1156                 memcpy(info->buffer + info->pos, data, len);
1157                 info->pos += len;
1158         }
1159 }
1160
1161 static int copy_info(struct info_str *info, char *fmt, ...)
1162 {
1163         va_list args;
1164         char buf[81];
1165         int len;
1166
1167         va_start(args, fmt);
1168         len = vsprintf(buf, fmt, args);
1169         va_end(args);
1170
1171         copy_mem_info(info, buf, len);
1172         return len;
1173 }
1174
1175 /*
1176  *  Copy formatted information into the input buffer.
1177  */
1178 static int sym_host_info(struct Scsi_Host *shost, char *ptr, off_t offset, int len)
1179 {
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         struct info_str info;
1184
1185         info.buffer     = ptr;
1186         info.length     = len;
1187         info.offset     = offset;
1188         info.pos        = 0;
1189
1190         copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1191                          "revision id 0x%x\n", np->s.chip_name,
1192                          pdev->device, pdev->revision);
1193         copy_info(&info, "At PCI address %s, IRQ %u\n",
1194                          pci_name(pdev), pdev->irq);
1195         copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1196                          (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1197                          np->maxwide ? "Wide" : "Narrow",
1198                          np->minsync_dt ? ", DT capable" : "");
1199
1200         copy_info(&info, "Max. started commands %d, "
1201                          "max. commands per LUN %d\n",
1202                          SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1203
1204         return info.pos > info.offset? info.pos - info.offset : 0;
1205 }
1206 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1207
1208 /*
1209  *  Entry point of the scsi proc fs of the driver.
1210  *  - func = 0 means read  (returns adapter infos)
1211  *  - func = 1 means write (not yet merget from sym53c8xx)
1212  */
1213 static int sym53c8xx_proc_info(struct Scsi_Host *shost, char *buffer,
1214                         char **start, off_t offset, int length, int func)
1215 {
1216         int retv;
1217
1218         if (func) {
1219 #ifdef  SYM_LINUX_USER_COMMAND_SUPPORT
1220                 retv = sym_user_command(shost, buffer, length);
1221 #else
1222                 retv = -EINVAL;
1223 #endif
1224         } else {
1225                 if (start)
1226                         *start = buffer;
1227 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1228                 retv = sym_host_info(shost, buffer, offset, length);
1229 #else
1230                 retv = -EINVAL;
1231 #endif
1232         }
1233
1234         return retv;
1235 }
1236 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1237
1238 /*
1239  *      Free controller resources.
1240  */
1241 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev)
1242 {
1243         /*
1244          *  Free O/S specific resources.
1245          */
1246         if (pdev->irq)
1247                 free_irq(pdev->irq, np->s.host);
1248         if (np->s.ioaddr)
1249                 pci_iounmap(pdev, np->s.ioaddr);
1250         if (np->s.ramaddr)
1251                 pci_iounmap(pdev, np->s.ramaddr);
1252         /*
1253          *  Free O/S independent resources.
1254          */
1255         sym_hcb_free(np);
1256
1257         sym_mfree_dma(np, sizeof(*np), "HCB");
1258 }
1259
1260 /*
1261  *  Host attach and initialisations.
1262  *
1263  *  Allocate host data and ncb structure.
1264  *  Remap MMIO region.
1265  *  Do chip initialization.
1266  *  If all is OK, install interrupt handling and
1267  *  start the timer daemon.
1268  */
1269 static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1270                 int unit, struct sym_device *dev)
1271 {
1272         struct sym_data *sym_data;
1273         struct sym_hcb *np = NULL;
1274         struct Scsi_Host *shost;
1275         struct pci_dev *pdev = dev->pdev;
1276         unsigned long flags;
1277         struct sym_fw *fw;
1278
1279         printk(KERN_INFO "sym%d: <%s> rev 0x%x at pci %s irq %u\n",
1280                 unit, dev->chip.name, pdev->revision, pci_name(pdev),
1281                 pdev->irq);
1282
1283         /*
1284          *  Get the firmware for this chip.
1285          */
1286         fw = sym_find_firmware(&dev->chip);
1287         if (!fw)
1288                 return NULL;
1289
1290         shost = scsi_host_alloc(tpnt, sizeof(*sym_data));
1291         if (!shost)
1292                 return NULL;
1293         sym_data = shost_priv(shost);
1294
1295         /*
1296          *  Allocate immediately the host control block, 
1297          *  since we are only expecting to succeed. :)
1298          *  We keep track in the HCB of all the resources that 
1299          *  are to be released on error.
1300          */
1301         np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1302         if (!np)
1303                 goto attach_failed;
1304         np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1305         sym_data->ncb = np;
1306         sym_data->pdev = pdev;
1307         np->s.host = shost;
1308
1309         pci_set_drvdata(pdev, shost);
1310
1311         /*
1312          *  Copy some useful infos to the HCB.
1313          */
1314         np->hcb_ba      = vtobus(np);
1315         np->verbose     = sym_driver_setup.verbose;
1316         np->s.unit      = unit;
1317         np->features    = dev->chip.features;
1318         np->clock_divn  = dev->chip.nr_divisor;
1319         np->maxoffs     = dev->chip.offset_max;
1320         np->maxburst    = dev->chip.burst_max;
1321         np->myaddr      = dev->host_id;
1322
1323         /*
1324          *  Edit its name.
1325          */
1326         strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1327         sprintf(np->s.inst_name, "sym%d", np->s.unit);
1328
1329         if ((SYM_CONF_DMA_ADDRESSING_MODE > 0) && (np->features & FE_DAC) &&
1330                         !pci_set_dma_mask(pdev, DMA_DAC_MASK)) {
1331                 set_dac(np);
1332         } else if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
1333                 printf_warning("%s: No suitable DMA available\n", sym_name(np));
1334                 goto attach_failed;
1335         }
1336
1337         /*
1338          *  Try to map the controller chip to
1339          *  virtual and physical memory.
1340          */
1341         np->mmio_ba = (u32)dev->mmio_base;
1342         np->s.ioaddr    = dev->s.ioaddr;
1343         np->s.ramaddr   = dev->s.ramaddr;
1344
1345         /*
1346          *  Map on-chip RAM if present and supported.
1347          */
1348         if (!(np->features & FE_RAM))
1349                 dev->ram_base = 0;
1350         if (dev->ram_base)
1351                 np->ram_ba = (u32)dev->ram_base;
1352
1353         if (sym_hcb_attach(shost, fw, dev->nvram))
1354                 goto attach_failed;
1355
1356         /*
1357          *  Install the interrupt handler.
1358          *  If we synchonize the C code with SCRIPTS on interrupt, 
1359          *  we do not want to share the INTR line at all.
1360          */
1361         if (request_irq(pdev->irq, sym53c8xx_intr, IRQF_SHARED, NAME53C8XX,
1362                         shost)) {
1363                 printf_err("%s: request irq %u failure\n",
1364                         sym_name(np), pdev->irq);
1365                 goto attach_failed;
1366         }
1367
1368         /*
1369          *  After SCSI devices have been opened, we cannot
1370          *  reset the bus safely, so we do it here.
1371          */
1372         spin_lock_irqsave(shost->host_lock, flags);
1373         if (sym_reset_scsi_bus(np, 0))
1374                 goto reset_failed;
1375
1376         /*
1377          *  Start the SCRIPTS.
1378          */
1379         sym_start_up(shost, 1);
1380
1381         /*
1382          *  Start the timer daemon
1383          */
1384         init_timer(&np->s.timer);
1385         np->s.timer.data     = (unsigned long) np;
1386         np->s.timer.function = sym53c8xx_timer;
1387         np->s.lasttime=0;
1388         sym_timer (np);
1389
1390         /*
1391          *  Fill Linux host instance structure
1392          *  and return success.
1393          */
1394         shost->max_channel      = 0;
1395         shost->this_id          = np->myaddr;
1396         shost->max_id           = np->maxwide ? 16 : 8;
1397         shost->max_lun          = SYM_CONF_MAX_LUN;
1398         shost->unique_id        = pci_resource_start(pdev, 0);
1399         shost->cmd_per_lun      = SYM_CONF_MAX_TAG;
1400         shost->can_queue        = (SYM_CONF_MAX_START-2);
1401         shost->sg_tablesize     = SYM_CONF_MAX_SG;
1402         shost->max_cmd_len      = 16;
1403         BUG_ON(sym2_transport_template == NULL);
1404         shost->transportt       = sym2_transport_template;
1405
1406         /* 53c896 rev 1 errata: DMA may not cross 16MB boundary */
1407         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 2)
1408                 shost->dma_boundary = 0xFFFFFF;
1409
1410         spin_unlock_irqrestore(shost->host_lock, flags);
1411
1412         return shost;
1413
1414  reset_failed:
1415         printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1416                    "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1417         spin_unlock_irqrestore(shost->host_lock, flags);
1418  attach_failed:
1419         if (!shost)
1420                 return NULL;
1421         printf_info("%s: giving up ...\n", sym_name(np));
1422         if (np)
1423                 sym_free_resources(np, pdev);
1424         scsi_host_put(shost);
1425
1426         return NULL;
1427  }
1428
1429
1430 /*
1431  *    Detect and try to read SYMBIOS and TEKRAM NVRAM.
1432  */
1433 #if SYM_CONF_NVRAM_SUPPORT
1434 static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1435 {
1436         devp->nvram = nvp;
1437         nvp->type = 0;
1438
1439         sym_read_nvram(devp, nvp);
1440 }
1441 #else
1442 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1443 {
1444 }
1445 #endif  /* SYM_CONF_NVRAM_SUPPORT */
1446
1447 static int __devinit sym_check_supported(struct sym_device *device)
1448 {
1449         struct sym_chip *chip;
1450         struct pci_dev *pdev = device->pdev;
1451         unsigned long io_port = pci_resource_start(pdev, 0);
1452         int i;
1453
1454         /*
1455          *  If user excluded this chip, do not initialize it.
1456          *  I hate this code so much.  Must kill it.
1457          */
1458         if (io_port) {
1459                 for (i = 0 ; i < 8 ; i++) {
1460                         if (sym_driver_setup.excludes[i] == io_port)
1461                                 return -ENODEV;
1462                 }
1463         }
1464
1465         /*
1466          * Check if the chip is supported.  Then copy the chip description
1467          * to our device structure so we can make it match the actual device
1468          * and options.
1469          */
1470         chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1471         if (!chip) {
1472                 dev_info(&pdev->dev, "device not supported\n");
1473                 return -ENODEV;
1474         }
1475         memcpy(&device->chip, chip, sizeof(device->chip));
1476
1477         return 0;
1478 }
1479
1480 /*
1481  * Ignore Symbios chips controlled by various RAID controllers.
1482  * These controllers set value 0x52414944 at RAM end - 16.
1483  */
1484 static int __devinit sym_check_raid(struct sym_device *device)
1485 {
1486         unsigned int ram_size, ram_val;
1487
1488         if (!device->s.ramaddr)
1489                 return 0;
1490
1491         if (device->chip.features & FE_RAM8K)
1492                 ram_size = 8192;
1493         else
1494                 ram_size = 4096;
1495
1496         ram_val = readl(device->s.ramaddr + ram_size - 16);
1497         if (ram_val != 0x52414944)
1498                 return 0;
1499
1500         dev_info(&device->pdev->dev,
1501                         "not initializing, driven by RAID controller.\n");
1502         return -ENODEV;
1503 }
1504
1505 static int __devinit sym_set_workarounds(struct sym_device *device)
1506 {
1507         struct sym_chip *chip = &device->chip;
1508         struct pci_dev *pdev = device->pdev;
1509         u_short status_reg;
1510
1511         /*
1512          *  (ITEM 12 of a DEL about the 896 I haven't yet).
1513          *  We must ensure the chip will use WRITE AND INVALIDATE.
1514          *  The revision number limit is for now arbitrary.
1515          */
1516         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 0x4) {
1517                 chip->features  |= (FE_WRIE | FE_CLSE);
1518         }
1519
1520         /* If the chip can do Memory Write Invalidate, enable it */
1521         if (chip->features & FE_WRIE) {
1522                 if (pci_set_mwi(pdev))
1523                         return -ENODEV;
1524         }
1525
1526         /*
1527          *  Work around for errant bit in 895A. The 66Mhz
1528          *  capable bit is set erroneously. Clear this bit.
1529          *  (Item 1 DEL 533)
1530          *
1531          *  Make sure Config space and Features agree.
1532          *
1533          *  Recall: writes are not normal to status register -
1534          *  write a 1 to clear and a 0 to leave unchanged.
1535          *  Can only reset bits.
1536          */
1537         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1538         if (chip->features & FE_66MHZ) {
1539                 if (!(status_reg & PCI_STATUS_66MHZ))
1540                         chip->features &= ~FE_66MHZ;
1541         } else {
1542                 if (status_reg & PCI_STATUS_66MHZ) {
1543                         status_reg = PCI_STATUS_66MHZ;
1544                         pci_write_config_word(pdev, PCI_STATUS, status_reg);
1545                         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1546                 }
1547         }
1548
1549         return 0;
1550 }
1551
1552 /*
1553  *  Read and check the PCI configuration for any detected NCR 
1554  *  boards and save data for attaching after all boards have 
1555  *  been detected.
1556  */
1557 static void __devinit
1558 sym_init_device(struct pci_dev *pdev, struct sym_device *device)
1559 {
1560         int i = 2;
1561         struct pci_bus_region bus_addr;
1562
1563         device->host_id = SYM_SETUP_HOST_ID;
1564         device->pdev = pdev;
1565
1566         pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[1]);
1567         device->mmio_base = bus_addr.start;
1568
1569         /*
1570          * If the BAR is 64-bit, resource 2 will be occupied by the
1571          * upper 32 bits
1572          */
1573         if (!pdev->resource[i].flags)
1574                 i++;
1575         pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[i]);
1576         device->ram_base = bus_addr.start;
1577
1578 #ifdef CONFIG_SCSI_SYM53C8XX_MMIO
1579         if (device->mmio_base)
1580                 device->s.ioaddr = pci_iomap(pdev, 1,
1581                                                 pci_resource_len(pdev, 1));
1582 #endif
1583         if (!device->s.ioaddr)
1584                 device->s.ioaddr = pci_iomap(pdev, 0,
1585                                                 pci_resource_len(pdev, 0));
1586         if (device->ram_base)
1587                 device->s.ramaddr = pci_iomap(pdev, i,
1588                                                 pci_resource_len(pdev, i));
1589 }
1590
1591 /*
1592  * The NCR PQS and PDS cards are constructed as a DEC bridge
1593  * behind which sits a proprietary NCR memory controller and
1594  * either four or two 53c875s as separate devices.  We can tell
1595  * if an 875 is part of a PQS/PDS or not since if it is, it will
1596  * be on the same bus as the memory controller.  In its usual
1597  * mode of operation, the 875s are slaved to the memory
1598  * controller for all transfers.  To operate with the Linux
1599  * driver, the memory controller is disabled and the 875s
1600  * freed to function independently.  The only wrinkle is that
1601  * the preset SCSI ID (which may be zero) must be read in from
1602  * a special configuration space register of the 875.
1603  */
1604 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1605 {
1606         int slot;
1607         u8 tmp;
1608
1609         for (slot = 0; slot < 256; slot++) {
1610                 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1611
1612                 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1613                         pci_dev_put(memc);
1614                         continue;
1615                 }
1616
1617                 /* bit 1: allow individual 875 configuration */
1618                 pci_read_config_byte(memc, 0x44, &tmp);
1619                 if ((tmp & 0x2) == 0) {
1620                         tmp |= 0x2;
1621                         pci_write_config_byte(memc, 0x44, tmp);
1622                 }
1623
1624                 /* bit 2: drive individual 875 interrupts to the bus */
1625                 pci_read_config_byte(memc, 0x45, &tmp);
1626                 if ((tmp & 0x4) == 0) {
1627                         tmp |= 0x4;
1628                         pci_write_config_byte(memc, 0x45, tmp);
1629                 }
1630
1631                 pci_dev_put(memc);
1632                 break;
1633         }
1634
1635         pci_read_config_byte(pdev, 0x84, &tmp);
1636         sym_dev->host_id = tmp;
1637 }
1638
1639 /*
1640  *  Called before unloading the module.
1641  *  Detach the host.
1642  *  We have to free resources and halt the NCR chip.
1643  */
1644 static int sym_detach(struct Scsi_Host *shost, struct pci_dev *pdev)
1645 {
1646         struct sym_hcb *np = sym_get_hcb(shost);
1647         printk("%s: detaching ...\n", sym_name(np));
1648
1649         del_timer_sync(&np->s.timer);
1650
1651         /*
1652          * Reset NCR chip.
1653          * We should use sym_soft_reset(), but we don't want to do 
1654          * so, since we may not be safe if interrupts occur.
1655          */
1656         printk("%s: resetting chip\n", sym_name(np));
1657         OUTB(np, nc_istat, SRST);
1658         INB(np, nc_mbox1);
1659         udelay(10);
1660         OUTB(np, nc_istat, 0);
1661
1662         sym_free_resources(np, pdev);
1663
1664         return 1;
1665 }
1666
1667 /*
1668  * Driver host template.
1669  */
1670 static struct scsi_host_template sym2_template = {
1671         .module                 = THIS_MODULE,
1672         .name                   = "sym53c8xx",
1673         .info                   = sym53c8xx_info, 
1674         .queuecommand           = sym53c8xx_queue_command,
1675         .slave_alloc            = sym53c8xx_slave_alloc,
1676         .slave_configure        = sym53c8xx_slave_configure,
1677         .slave_destroy          = sym53c8xx_slave_destroy,
1678         .eh_abort_handler       = sym53c8xx_eh_abort_handler,
1679         .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1680         .eh_bus_reset_handler   = sym53c8xx_eh_bus_reset_handler,
1681         .eh_host_reset_handler  = sym53c8xx_eh_host_reset_handler,
1682         .this_id                = 7,
1683         .use_clustering         = ENABLE_CLUSTERING,
1684         .max_sectors            = 0xFFFF,
1685 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1686         .proc_info              = sym53c8xx_proc_info,
1687         .proc_name              = NAME53C8XX,
1688 #endif
1689 };
1690
1691 static int attach_count;
1692
1693 static int __devinit sym2_probe(struct pci_dev *pdev,
1694                                 const struct pci_device_id *ent)
1695 {
1696         struct sym_device sym_dev;
1697         struct sym_nvram nvram;
1698         struct Scsi_Host *shost;
1699
1700         memset(&sym_dev, 0, sizeof(sym_dev));
1701         memset(&nvram, 0, sizeof(nvram));
1702
1703         if (pci_enable_device(pdev))
1704                 goto leave;
1705
1706         pci_set_master(pdev);
1707
1708         if (pci_request_regions(pdev, NAME53C8XX))
1709                 goto disable;
1710
1711         sym_init_device(pdev, &sym_dev);
1712         if (sym_check_supported(&sym_dev))
1713                 goto free;
1714
1715         if (sym_check_raid(&sym_dev))
1716                 goto leave;     /* Don't disable the device */
1717
1718         if (sym_set_workarounds(&sym_dev))
1719                 goto free;
1720
1721         sym_config_pqs(pdev, &sym_dev);
1722
1723         sym_get_nvram(&sym_dev, &nvram);
1724
1725         shost = sym_attach(&sym2_template, attach_count, &sym_dev);
1726         if (!shost)
1727                 goto free;
1728
1729         if (scsi_add_host(shost, &pdev->dev))
1730                 goto detach;
1731         scsi_scan_host(shost);
1732
1733         attach_count++;
1734
1735         return 0;
1736
1737  detach:
1738         sym_detach(pci_get_drvdata(pdev), pdev);
1739  free:
1740         pci_release_regions(pdev);
1741  disable:
1742         pci_disable_device(pdev);
1743  leave:
1744         return -ENODEV;
1745 }
1746
1747 static void sym2_remove(struct pci_dev *pdev)
1748 {
1749         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1750
1751         scsi_remove_host(shost);
1752         scsi_host_put(shost);
1753         sym_detach(shost, pdev);
1754         pci_release_regions(pdev);
1755         pci_disable_device(pdev);
1756
1757         attach_count--;
1758 }
1759
1760 /**
1761  * sym2_io_error_detected() - called when PCI error is detected
1762  * @pdev: pointer to PCI device
1763  * @state: current state of the PCI slot
1764  */
1765 static pci_ers_result_t sym2_io_error_detected(struct pci_dev *pdev,
1766                                          enum pci_channel_state state)
1767 {
1768         /* If slot is permanently frozen, turn everything off */
1769         if (state == pci_channel_io_perm_failure) {
1770                 sym2_remove(pdev);
1771                 return PCI_ERS_RESULT_DISCONNECT;
1772         }
1773
1774         disable_irq(pdev->irq);
1775         pci_disable_device(pdev);
1776
1777         /* Request that MMIO be enabled, so register dump can be taken. */
1778         return PCI_ERS_RESULT_CAN_RECOVER;
1779 }
1780
1781 /**
1782  * sym2_io_slot_dump - Enable MMIO and dump debug registers
1783  * @pdev: pointer to PCI device
1784  */
1785 static pci_ers_result_t sym2_io_slot_dump(struct pci_dev *pdev)
1786 {
1787         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1788
1789         sym_dump_registers(shost);
1790
1791         /* Request a slot reset. */
1792         return PCI_ERS_RESULT_NEED_RESET;
1793 }
1794
1795 /**
1796  * sym2_reset_workarounds - hardware-specific work-arounds
1797  *
1798  * This routine is similar to sym_set_workarounds(), except
1799  * that, at this point, we already know that the device was
1800  * succesfully intialized at least once before, and so most
1801  * of the steps taken there are un-needed here.
1802  */
1803 static void sym2_reset_workarounds(struct pci_dev *pdev)
1804 {
1805         u_short status_reg;
1806         struct sym_chip *chip;
1807
1808         chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1809
1810         /* Work around for errant bit in 895A, in a fashion
1811          * similar to what is done in sym_set_workarounds().
1812          */
1813         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1814         if (!(chip->features & FE_66MHZ) && (status_reg & PCI_STATUS_66MHZ)) {
1815                 status_reg = PCI_STATUS_66MHZ;
1816                 pci_write_config_word(pdev, PCI_STATUS, status_reg);
1817                 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1818         }
1819 }
1820
1821 /**
1822  * sym2_io_slot_reset() - called when the pci bus has been reset.
1823  * @pdev: pointer to PCI device
1824  *
1825  * Restart the card from scratch.
1826  */
1827 static pci_ers_result_t sym2_io_slot_reset(struct pci_dev *pdev)
1828 {
1829         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1830         struct sym_hcb *np = sym_get_hcb(shost);
1831
1832         printk(KERN_INFO "%s: recovering from a PCI slot reset\n",
1833                   sym_name(np));
1834
1835         if (pci_enable_device(pdev)) {
1836                 printk(KERN_ERR "%s: Unable to enable after PCI reset\n",
1837                         sym_name(np));
1838                 return PCI_ERS_RESULT_DISCONNECT;
1839         }
1840
1841         pci_set_master(pdev);
1842         enable_irq(pdev->irq);
1843
1844         /* If the chip can do Memory Write Invalidate, enable it */
1845         if (np->features & FE_WRIE) {
1846                 if (pci_set_mwi(pdev))
1847                         return PCI_ERS_RESULT_DISCONNECT;
1848         }
1849
1850         /* Perform work-arounds, analogous to sym_set_workarounds() */
1851         sym2_reset_workarounds(pdev);
1852
1853         /* Perform host reset only on one instance of the card */
1854         if (PCI_FUNC(pdev->devfn) == 0) {
1855                 if (sym_reset_scsi_bus(np, 0)) {
1856                         printk(KERN_ERR "%s: Unable to reset scsi host\n",
1857                                 sym_name(np));
1858                         return PCI_ERS_RESULT_DISCONNECT;
1859                 }
1860                 sym_start_up(shost, 1);
1861         }
1862
1863         return PCI_ERS_RESULT_RECOVERED;
1864 }
1865
1866 /**
1867  * sym2_io_resume() - resume normal ops after PCI reset
1868  * @pdev: pointer to PCI device
1869  *
1870  * Called when the error recovery driver tells us that its
1871  * OK to resume normal operation. Use completion to allow
1872  * halted scsi ops to resume.
1873  */
1874 static void sym2_io_resume(struct pci_dev *pdev)
1875 {
1876         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1877         struct sym_data *sym_data = shost_priv(shost);
1878
1879         spin_lock_irq(shost->host_lock);
1880         if (sym_data->io_reset)
1881                 complete_all(sym_data->io_reset);
1882         spin_unlock_irq(shost->host_lock);
1883 }
1884
1885 static void sym2_get_signalling(struct Scsi_Host *shost)
1886 {
1887         struct sym_hcb *np = sym_get_hcb(shost);
1888         enum spi_signal_type type;
1889
1890         switch (np->scsi_mode) {
1891         case SMODE_SE:
1892                 type = SPI_SIGNAL_SE;
1893                 break;
1894         case SMODE_LVD:
1895                 type = SPI_SIGNAL_LVD;
1896                 break;
1897         case SMODE_HVD:
1898                 type = SPI_SIGNAL_HVD;
1899                 break;
1900         default:
1901                 type = SPI_SIGNAL_UNKNOWN;
1902                 break;
1903         }
1904         spi_signalling(shost) = type;
1905 }
1906
1907 static void sym2_set_offset(struct scsi_target *starget, int offset)
1908 {
1909         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1910         struct sym_hcb *np = sym_get_hcb(shost);
1911         struct sym_tcb *tp = &np->target[starget->id];
1912
1913         tp->tgoal.offset = offset;
1914         tp->tgoal.check_nego = 1;
1915 }
1916
1917 static void sym2_set_period(struct scsi_target *starget, int period)
1918 {
1919         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1920         struct sym_hcb *np = sym_get_hcb(shost);
1921         struct sym_tcb *tp = &np->target[starget->id];
1922
1923         /* have to have DT for these transfers, but DT will also
1924          * set width, so check that this is allowed */
1925         if (period <= np->minsync && spi_width(starget))
1926                 tp->tgoal.dt = 1;
1927
1928         tp->tgoal.period = period;
1929         tp->tgoal.check_nego = 1;
1930 }
1931
1932 static void sym2_set_width(struct scsi_target *starget, int width)
1933 {
1934         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1935         struct sym_hcb *np = sym_get_hcb(shost);
1936         struct sym_tcb *tp = &np->target[starget->id];
1937
1938         /* It is illegal to have DT set on narrow transfers.  If DT is
1939          * clear, we must also clear IU and QAS.  */
1940         if (width == 0)
1941                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1942
1943         tp->tgoal.width = width;
1944         tp->tgoal.check_nego = 1;
1945 }
1946
1947 static void sym2_set_dt(struct scsi_target *starget, int dt)
1948 {
1949         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1950         struct sym_hcb *np = sym_get_hcb(shost);
1951         struct sym_tcb *tp = &np->target[starget->id];
1952
1953         /* We must clear QAS and IU if DT is clear */
1954         if (dt)
1955                 tp->tgoal.dt = 1;
1956         else
1957                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1958         tp->tgoal.check_nego = 1;
1959 }
1960
1961 #if 0
1962 static void sym2_set_iu(struct scsi_target *starget, int iu)
1963 {
1964         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1965         struct sym_hcb *np = sym_get_hcb(shost);
1966         struct sym_tcb *tp = &np->target[starget->id];
1967
1968         if (iu)
1969                 tp->tgoal.iu = tp->tgoal.dt = 1;
1970         else
1971                 tp->tgoal.iu = 0;
1972         tp->tgoal.check_nego = 1;
1973 }
1974
1975 static void sym2_set_qas(struct scsi_target *starget, int qas)
1976 {
1977         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1978         struct sym_hcb *np = sym_get_hcb(shost);
1979         struct sym_tcb *tp = &np->target[starget->id];
1980
1981         if (qas)
1982                 tp->tgoal.dt = tp->tgoal.qas = 1;
1983         else
1984                 tp->tgoal.qas = 0;
1985         tp->tgoal.check_nego = 1;
1986 }
1987 #endif
1988
1989 static struct spi_function_template sym2_transport_functions = {
1990         .set_offset     = sym2_set_offset,
1991         .show_offset    = 1,
1992         .set_period     = sym2_set_period,
1993         .show_period    = 1,
1994         .set_width      = sym2_set_width,
1995         .show_width     = 1,
1996         .set_dt         = sym2_set_dt,
1997         .show_dt        = 1,
1998 #if 0
1999         .set_iu         = sym2_set_iu,
2000         .show_iu        = 1,
2001         .set_qas        = sym2_set_qas,
2002         .show_qas       = 1,
2003 #endif
2004         .get_signalling = sym2_get_signalling,
2005 };
2006
2007 static struct pci_device_id sym2_id_table[] __devinitdata = {
2008         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2009           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2010         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2011           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2012         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2013           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2014         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2015           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2016         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2017           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2018         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2019           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2020         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2021           PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL },
2022         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2023           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2024         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2025           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2026         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2027           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2028         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2029           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2030         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2031           PCI_ANY_ID, PCI_ANY_ID,  PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL }, /* new */
2032         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2033           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2034         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2035           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2036         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2037           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2038         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2039           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2040         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2041           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2042         { 0, }
2043 };
2044
2045 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2046
2047 static struct pci_error_handlers sym2_err_handler = {
2048         .error_detected = sym2_io_error_detected,
2049         .mmio_enabled   = sym2_io_slot_dump,
2050         .slot_reset     = sym2_io_slot_reset,
2051         .resume         = sym2_io_resume,
2052 };
2053
2054 static struct pci_driver sym2_driver = {
2055         .name           = NAME53C8XX,
2056         .id_table       = sym2_id_table,
2057         .probe          = sym2_probe,
2058         .remove         = sym2_remove,
2059         .err_handler    = &sym2_err_handler,
2060 };
2061
2062 static int __init sym2_init(void)
2063 {
2064         int error;
2065
2066         sym2_setup_params();
2067         sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2068         if (!sym2_transport_template)
2069                 return -ENODEV;
2070
2071         error = pci_register_driver(&sym2_driver);
2072         if (error)
2073                 spi_release_transport(sym2_transport_template);
2074         return error;
2075 }
2076
2077 static void __exit sym2_exit(void)
2078 {
2079         pci_unregister_driver(&sym2_driver);
2080         spi_release_transport(sym2_transport_template);
2081 }
2082
2083 module_init(sym2_init);
2084 module_exit(sym2_exit);