Merge branch 'irq-upstream' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...
[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, sizeof(cmd->sense_buffer));
211                         memcpy(cmd->sense_buffer, cp->sns_bbuf,
212                               min(sizeof(cmd->sense_buffer),
213                                   (size_t)SYM_SNS_BBUF_LEN));
214 #if 0
215                         /*
216                          *  If the device reports a UNIT ATTENTION condition 
217                          *  due to a RESET condition, we should consider all 
218                          *  disconnect CCBs for this unit as aborted.
219                          */
220                         if (1) {
221                                 u_char *p;
222                                 p  = (u_char *) cmd->sense_data;
223                                 if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
224                                         sym_clear_tasks(np, DID_ABORT,
225                                                         cp->target,cp->lun, -1);
226                         }
227 #endif
228                 } else {
229                         /*
230                          * Error return from our internal request sense.  This
231                          * is bad: we must clear the contingent allegiance
232                          * condition otherwise the device will always return
233                          * BUSY.  Use a big stick.
234                          */
235                         sym_reset_scsi_target(np, cmd->device->id);
236                         cam_status = DID_ERROR;
237                 }
238         } else if (cp->host_status == HS_COMPLETE)      /* Bad SCSI status */
239                 cam_status = DID_OK;
240         else if (cp->host_status == HS_SEL_TIMEOUT)     /* Selection timeout */
241                 cam_status = DID_NO_CONNECT;
242         else if (cp->host_status == HS_UNEXPECTED)      /* Unexpected BUS FREE*/
243                 cam_status = DID_ERROR;
244         else {                                          /* Extended error */
245                 if (sym_verbose) {
246                         sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
247                                 cp->host_status, cp->ssss_status,
248                                 cp->xerr_status);
249                 }
250                 /*
251                  *  Set the most appropriate value for CAM status.
252                  */
253                 cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
254         }
255         scsi_set_resid(cmd, resid);
256         cmd->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
257 }
258
259 static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
260 {
261         int segment;
262         int use_sg;
263
264         cp->data_len = 0;
265
266         use_sg = scsi_dma_map(cmd);
267         if (use_sg > 0) {
268                 struct scatterlist *sg;
269                 struct sym_tcb *tp = &np->target[cp->target];
270                 struct sym_tblmove *data;
271
272                 if (use_sg > SYM_CONF_MAX_SG) {
273                         scsi_dma_unmap(cmd);
274                         return -1;
275                 }
276
277                 data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
278
279                 scsi_for_each_sg(cmd, sg, use_sg, segment) {
280                         dma_addr_t baddr = sg_dma_address(sg);
281                         unsigned int len = sg_dma_len(sg);
282
283                         if ((len & 1) && (tp->head.wval & EWS)) {
284                                 len++;
285                                 cp->odd_byte_adjustment++;
286                         }
287
288                         sym_build_sge(np, &data[segment], baddr, len);
289                         cp->data_len += len;
290                 }
291         } else {
292                 segment = -2;
293         }
294
295         return segment;
296 }
297
298 /*
299  *  Queue a SCSI command.
300  */
301 static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd)
302 {
303         struct scsi_device *sdev = cmd->device;
304         struct sym_tcb *tp;
305         struct sym_lcb *lp;
306         struct sym_ccb *cp;
307         int     order;
308
309         /*
310          *  Retrieve the target descriptor.
311          */
312         tp = &np->target[sdev->id];
313
314         /*
315          *  Select tagged/untagged.
316          */
317         lp = sym_lp(tp, sdev->lun);
318         order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
319
320         /*
321          *  Queue the SCSI IO.
322          */
323         cp = sym_get_ccb(np, cmd, order);
324         if (!cp)
325                 return 1;       /* Means resource shortage */
326         sym_queue_scsiio(np, cmd, cp);
327         return 0;
328 }
329
330 /*
331  *  Setup buffers and pointers that address the CDB.
332  */
333 static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
334 {
335         memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len);
336
337         cp->phys.cmd.addr = CCB_BA(cp, cdb_buf[0]);
338         cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
339
340         return 0;
341 }
342
343 /*
344  *  Setup pointers that address the data and start the I/O.
345  */
346 int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
347 {
348         u32 lastp, goalp;
349         int dir;
350
351         /*
352          *  Build the CDB.
353          */
354         if (sym_setup_cdb(np, cmd, cp))
355                 goto out_abort;
356
357         /*
358          *  No direction means no data.
359          */
360         dir = cmd->sc_data_direction;
361         if (dir != DMA_NONE) {
362                 cp->segments = sym_scatter(np, cp, cmd);
363                 if (cp->segments < 0) {
364                         sym_set_cam_status(cmd, DID_ERROR);
365                         goto out_abort;
366                 }
367
368                 /*
369                  *  No segments means no data.
370                  */
371                 if (!cp->segments)
372                         dir = DMA_NONE;
373         } else {
374                 cp->data_len = 0;
375                 cp->segments = 0;
376         }
377
378         /*
379          *  Set the data pointer.
380          */
381         switch (dir) {
382         case DMA_BIDIRECTIONAL:
383                 scmd_printk(KERN_INFO, cmd, "got DMA_BIDIRECTIONAL command");
384                 sym_set_cam_status(cmd, DID_ERROR);
385                 goto out_abort;
386         case DMA_TO_DEVICE:
387                 goalp = SCRIPTA_BA(np, data_out2) + 8;
388                 lastp = goalp - 8 - (cp->segments * (2*4));
389                 break;
390         case DMA_FROM_DEVICE:
391                 cp->host_flags |= HF_DATA_IN;
392                 goalp = SCRIPTA_BA(np, data_in2) + 8;
393                 lastp = goalp - 8 - (cp->segments * (2*4));
394                 break;
395         case DMA_NONE:
396         default:
397                 lastp = goalp = SCRIPTB_BA(np, no_data);
398                 break;
399         }
400
401         /*
402          *  Set all pointers values needed by SCRIPTS.
403          */
404         cp->phys.head.lastp = cpu_to_scr(lastp);
405         cp->phys.head.savep = cpu_to_scr(lastp);
406         cp->startp          = cp->phys.head.savep;
407         cp->goalp           = cpu_to_scr(goalp);
408
409         /*
410          *  When `#ifed 1', the code below makes the driver 
411          *  panic on the first attempt to write to a SCSI device.
412          *  It is the first test we want to do after a driver 
413          *  change that does not seem obviously safe. :)
414          */
415 #if 0
416         switch (cp->cdb_buf[0]) {
417         case 0x0A: case 0x2A: case 0xAA:
418                 panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
419                 break;
420         default:
421                 break;
422         }
423 #endif
424
425         /*
426          *      activate this job.
427          */
428         sym_put_start_queue(np, cp);
429         return 0;
430
431 out_abort:
432         sym_free_ccb(np, cp);
433         sym_xpt_done(np, cmd);
434         return 0;
435 }
436
437
438 /*
439  *  timer daemon.
440  *
441  *  Misused to keep the driver running when
442  *  interrupts are not configured correctly.
443  */
444 static void sym_timer(struct sym_hcb *np)
445 {
446         unsigned long thistime = jiffies;
447
448         /*
449          *  Restart the timer.
450          */
451         np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
452         add_timer(&np->s.timer);
453
454         /*
455          *  If we are resetting the ncr, wait for settle_time before 
456          *  clearing it. Then command processing will be resumed.
457          */
458         if (np->s.settle_time_valid) {
459                 if (time_before_eq(np->s.settle_time, thistime)) {
460                         if (sym_verbose >= 2 )
461                                 printk("%s: command processing resumed\n",
462                                        sym_name(np));
463                         np->s.settle_time_valid = 0;
464                 }
465                 return;
466         }
467
468         /*
469          *      Nothing to do for now, but that may come.
470          */
471         if (np->s.lasttime + 4*HZ < thistime) {
472                 np->s.lasttime = thistime;
473         }
474
475 #ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
476         /*
477          *  Some way-broken PCI bridges may lead to 
478          *  completions being lost when the clearing 
479          *  of the INTFLY flag by the CPU occurs 
480          *  concurrently with the chip raising this flag.
481          *  If this ever happen, lost completions will 
482          * be reaped here.
483          */
484         sym_wakeup_done(np);
485 #endif
486 }
487
488
489 /*
490  *  PCI BUS error handler.
491  */
492 void sym_log_bus_error(struct Scsi_Host *shost)
493 {
494         struct sym_data *sym_data = shost_priv(shost);
495         struct pci_dev *pdev = sym_data->pdev;
496         unsigned short pci_sts;
497         pci_read_config_word(pdev, PCI_STATUS, &pci_sts);
498         if (pci_sts & 0xf900) {
499                 pci_write_config_word(pdev, PCI_STATUS, pci_sts);
500                 shost_printk(KERN_WARNING, shost,
501                         "PCI bus error: status = 0x%04x\n", pci_sts & 0xf900);
502         }
503 }
504
505 /*
506  * queuecommand method.  Entered with the host adapter lock held and
507  * interrupts disabled.
508  */
509 static int sym53c8xx_queue_command(struct scsi_cmnd *cmd,
510                                         void (*done)(struct scsi_cmnd *))
511 {
512         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
513         struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
514         int sts = 0;
515
516         cmd->scsi_done = done;
517         memset(ucp, 0, sizeof(*ucp));
518
519         /*
520          *  Shorten our settle_time if needed for 
521          *  this command not to time out.
522          */
523         if (np->s.settle_time_valid && cmd->timeout_per_command) {
524                 unsigned long tlimit = jiffies + cmd->timeout_per_command;
525                 tlimit -= SYM_CONF_TIMER_INTERVAL*2;
526                 if (time_after(np->s.settle_time, tlimit)) {
527                         np->s.settle_time = tlimit;
528                 }
529         }
530
531         if (np->s.settle_time_valid)
532                 return SCSI_MLQUEUE_HOST_BUSY;
533
534         sts = sym_queue_command(np, cmd);
535         if (sts)
536                 return SCSI_MLQUEUE_HOST_BUSY;
537         return 0;
538 }
539
540 /*
541  *  Linux entry point of the interrupt handler.
542  */
543 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id)
544 {
545         struct Scsi_Host *shost = dev_id;
546         struct sym_data *sym_data = shost_priv(shost);
547         irqreturn_t result;
548
549         /* Avoid spinloop trying to handle interrupts on frozen device */
550         if (pci_channel_offline(sym_data->pdev))
551                 return IRQ_NONE;
552
553         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
554
555         spin_lock(shost->host_lock);
556         result = sym_interrupt(shost);
557         spin_unlock(shost->host_lock);
558
559         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
560
561         return result;
562 }
563
564 /*
565  *  Linux entry point of the timer handler
566  */
567 static void sym53c8xx_timer(unsigned long npref)
568 {
569         struct sym_hcb *np = (struct sym_hcb *)npref;
570         unsigned long flags;
571
572         spin_lock_irqsave(np->s.host->host_lock, flags);
573         sym_timer(np);
574         spin_unlock_irqrestore(np->s.host->host_lock, flags);
575 }
576
577
578 /*
579  *  What the eh thread wants us to perform.
580  */
581 #define SYM_EH_ABORT            0
582 #define SYM_EH_DEVICE_RESET     1
583 #define SYM_EH_BUS_RESET        2
584 #define SYM_EH_HOST_RESET       3
585
586 /*
587  *  Generic method for our eh processing.
588  *  The 'op' argument tells what we have to do.
589  */
590 static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
591 {
592         struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
593         struct Scsi_Host *shost = cmd->device->host;
594         struct sym_data *sym_data = shost_priv(shost);
595         struct pci_dev *pdev = sym_data->pdev;
596         struct sym_hcb *np = sym_data->ncb;
597         SYM_QUEHEAD *qp;
598         int cmd_queued = 0;
599         int sts = -1;
600         struct completion eh_done;
601
602         scmd_printk(KERN_WARNING, cmd, "%s operation started\n", opname);
603
604         /* We may be in an error condition because the PCI bus
605          * went down. In this case, we need to wait until the
606          * PCI bus is reset, the card is reset, and only then
607          * proceed with the scsi error recovery.  There's no
608          * point in hurrying; take a leisurely wait.
609          */
610 #define WAIT_FOR_PCI_RECOVERY   35
611         if (pci_channel_offline(pdev)) {
612                 struct completion *io_reset;
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                         if (!sym_data->io_reset)
619                                 sym_data->io_reset = &eh_done;
620                         io_reset = sym_data->io_reset;
621                 } else {
622                         finished_reset = 1;
623                 }
624                 spin_unlock_irq(shost->host_lock);
625                 if (!finished_reset)
626                         finished_reset = wait_for_completion_timeout(io_reset,
627                                                 WAIT_FOR_PCI_RECOVERY*HZ);
628                 if (!finished_reset)
629                         return SCSI_FAILED;
630         }
631
632         spin_lock_irq(shost->host_lock);
633         /* This one is queued in some place -> to wait for completion */
634         FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
635                 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
636                 if (cp->cmd == cmd) {
637                         cmd_queued = 1;
638                         break;
639                 }
640         }
641
642         /* Try to proceed the operation we have been asked for */
643         sts = -1;
644         switch(op) {
645         case SYM_EH_ABORT:
646                 sts = sym_abort_scsiio(np, cmd, 1);
647                 break;
648         case SYM_EH_DEVICE_RESET:
649                 sts = sym_reset_scsi_target(np, cmd->device->id);
650                 break;
651         case SYM_EH_BUS_RESET:
652                 sym_reset_scsi_bus(np, 1);
653                 sts = 0;
654                 break;
655         case SYM_EH_HOST_RESET:
656                 sym_reset_scsi_bus(np, 0);
657                 sym_start_up(shost, 1);
658                 sts = 0;
659                 break;
660         default:
661                 break;
662         }
663
664         /* On error, restore everything and cross fingers :) */
665         if (sts)
666                 cmd_queued = 0;
667
668         if (cmd_queued) {
669                 init_completion(&eh_done);
670                 ucmd->eh_done = &eh_done;
671                 spin_unlock_irq(shost->host_lock);
672                 if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
673                         ucmd->eh_done = NULL;
674                         sts = -2;
675                 }
676         } else {
677                 spin_unlock_irq(shost->host_lock);
678         }
679
680         dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
681                         sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
682         return sts ? SCSI_FAILED : SCSI_SUCCESS;
683 }
684
685
686 /*
687  * Error handlers called from the eh thread (one thread per HBA).
688  */
689 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
690 {
691         return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
692 }
693
694 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
695 {
696         return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
697 }
698
699 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
700 {
701         return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
702 }
703
704 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
705 {
706         return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
707 }
708
709 /*
710  *  Tune device queuing depth, according to various limits.
711  */
712 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
713 {
714         struct sym_lcb *lp = sym_lp(tp, lun);
715         u_short oldtags;
716
717         if (!lp)
718                 return;
719
720         oldtags = lp->s.reqtags;
721
722         if (reqtags > lp->s.scdev_depth)
723                 reqtags = lp->s.scdev_depth;
724
725         lp->s.reqtags     = reqtags;
726
727         if (reqtags != oldtags) {
728                 dev_info(&tp->starget->dev,
729                          "tagged command queuing %s, command queue depth %d.\n",
730                           lp->s.reqtags ? "enabled" : "disabled", reqtags);
731         }
732 }
733
734 static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
735 {
736         struct sym_hcb *np = sym_get_hcb(sdev->host);
737         struct sym_tcb *tp = &np->target[sdev->id];
738         struct sym_lcb *lp;
739
740         if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
741                 return -ENXIO;
742
743         tp->starget = sdev->sdev_target;
744         /*
745          * Fail the device init if the device is flagged NOSCAN at BOOT in
746          * the NVRAM.  This may speed up boot and maintain coherency with
747          * BIOS device numbering.  Clearing the flag allows the user to
748          * rescan skipped devices later.  We also return an error for
749          * devices not flagged for SCAN LUNS in the NVRAM since some single
750          * lun devices behave badly when asked for a non zero LUN.
751          */
752
753         if (tp->usrflags & SYM_SCAN_BOOT_DISABLED) {
754                 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
755                 starget_printk(KERN_INFO, tp->starget,
756                                 "Scan at boot disabled in NVRAM\n");
757                 return -ENXIO;
758         }
759
760         if (tp->usrflags & SYM_SCAN_LUNS_DISABLED) {
761                 if (sdev->lun != 0)
762                         return -ENXIO;
763                 starget_printk(KERN_INFO, tp->starget,
764                                 "Multiple LUNs disabled in NVRAM\n");
765         }
766
767         lp = sym_alloc_lcb(np, sdev->id, sdev->lun);
768         if (!lp)
769                 return -ENOMEM;
770
771         spi_min_period(tp->starget) = tp->usr_period;
772         spi_max_width(tp->starget) = tp->usr_width;
773
774         return 0;
775 }
776
777 /*
778  * Linux entry point for device queue sizing.
779  */
780 static int sym53c8xx_slave_configure(struct scsi_device *sdev)
781 {
782         struct sym_hcb *np = sym_get_hcb(sdev->host);
783         struct sym_tcb *tp = &np->target[sdev->id];
784         struct sym_lcb *lp = sym_lp(tp, sdev->lun);
785         int reqtags, depth_to_use;
786
787         /*
788          *  Get user flags.
789          */
790         lp->curr_flags = lp->user_flags;
791
792         /*
793          *  Select queue depth from driver setup.
794          *  Donnot use more than configured by user.
795          *  Use at least 2.
796          *  Donnot use more than our maximum.
797          */
798         reqtags = sym_driver_setup.max_tag;
799         if (reqtags > tp->usrtags)
800                 reqtags = tp->usrtags;
801         if (!sdev->tagged_supported)
802                 reqtags = 0;
803         if (reqtags > SYM_CONF_MAX_TAG)
804                 reqtags = SYM_CONF_MAX_TAG;
805         depth_to_use = reqtags ? reqtags : 2;
806         scsi_adjust_queue_depth(sdev,
807                                 sdev->tagged_supported ? MSG_SIMPLE_TAG : 0,
808                                 depth_to_use);
809         lp->s.scdev_depth = depth_to_use;
810         sym_tune_dev_queuing(tp, sdev->lun, reqtags);
811
812         if (!spi_initial_dv(sdev->sdev_target))
813                 spi_dv_device(sdev);
814
815         return 0;
816 }
817
818 static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
819 {
820         struct sym_hcb *np = sym_get_hcb(sdev->host);
821         struct sym_lcb *lp = sym_lp(&np->target[sdev->id], sdev->lun);
822
823         if (lp->itlq_tbl)
824                 sym_mfree_dma(lp->itlq_tbl, SYM_CONF_MAX_TASK * 4, "ITLQ_TBL");
825         kfree(lp->cb_tags);
826         sym_mfree_dma(lp, sizeof(*lp), "LCB");
827 }
828
829 /*
830  *  Linux entry point for info() function
831  */
832 static const char *sym53c8xx_info (struct Scsi_Host *host)
833 {
834         return SYM_DRIVER_NAME;
835 }
836
837
838 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
839 /*
840  *  Proc file system stuff
841  *
842  *  A read operation returns adapter information.
843  *  A write operation is a control command.
844  *  The string is parsed in the driver code and the command is passed 
845  *  to the sym_usercmd() function.
846  */
847
848 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
849
850 struct  sym_usrcmd {
851         u_long  target;
852         u_long  lun;
853         u_long  data;
854         u_long  cmd;
855 };
856
857 #define UC_SETSYNC      10
858 #define UC_SETTAGS      11
859 #define UC_SETDEBUG     12
860 #define UC_SETWIDE      14
861 #define UC_SETFLAG      15
862 #define UC_SETVERBOSE   17
863 #define UC_RESETDEV     18
864 #define UC_CLEARDEV     19
865
866 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
867 {
868         struct sym_tcb *tp;
869         int t, l;
870
871         switch (uc->cmd) {
872         case 0: return;
873
874 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
875         case UC_SETDEBUG:
876                 sym_debug_flags = uc->data;
877                 break;
878 #endif
879         case UC_SETVERBOSE:
880                 np->verbose = uc->data;
881                 break;
882         default:
883                 /*
884                  * We assume that other commands apply to targets.
885                  * This should always be the case and avoid the below 
886                  * 4 lines to be repeated 6 times.
887                  */
888                 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
889                         if (!((uc->target >> t) & 1))
890                                 continue;
891                         tp = &np->target[t];
892
893                         switch (uc->cmd) {
894
895                         case UC_SETSYNC:
896                                 if (!uc->data || uc->data >= 255) {
897                                         tp->tgoal.iu = tp->tgoal.dt =
898                                                 tp->tgoal.qas = 0;
899                                         tp->tgoal.offset = 0;
900                                 } else if (uc->data <= 9 && np->minsync_dt) {
901                                         if (uc->data < np->minsync_dt)
902                                                 uc->data = np->minsync_dt;
903                                         tp->tgoal.iu = tp->tgoal.dt =
904                                                 tp->tgoal.qas = 1;
905                                         tp->tgoal.width = 1;
906                                         tp->tgoal.period = uc->data;
907                                         tp->tgoal.offset = np->maxoffs_dt;
908                                 } else {
909                                         if (uc->data < np->minsync)
910                                                 uc->data = np->minsync;
911                                         tp->tgoal.iu = tp->tgoal.dt =
912                                                 tp->tgoal.qas = 0;
913                                         tp->tgoal.period = uc->data;
914                                         tp->tgoal.offset = np->maxoffs;
915                                 }
916                                 tp->tgoal.check_nego = 1;
917                                 break;
918                         case UC_SETWIDE:
919                                 tp->tgoal.width = uc->data ? 1 : 0;
920                                 tp->tgoal.check_nego = 1;
921                                 break;
922                         case UC_SETTAGS:
923                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
924                                         sym_tune_dev_queuing(tp, l, uc->data);
925                                 break;
926                         case UC_RESETDEV:
927                                 tp->to_reset = 1;
928                                 np->istat_sem = SEM;
929                                 OUTB(np, nc_istat, SIGP|SEM);
930                                 break;
931                         case UC_CLEARDEV:
932                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
933                                         struct sym_lcb *lp = sym_lp(tp, l);
934                                         if (lp) lp->to_clear = 1;
935                                 }
936                                 np->istat_sem = SEM;
937                                 OUTB(np, nc_istat, SIGP|SEM);
938                                 break;
939                         case UC_SETFLAG:
940                                 tp->usrflags = uc->data;
941                                 break;
942                         }
943                 }
944                 break;
945         }
946 }
947
948 static int skip_spaces(char *ptr, int len)
949 {
950         int cnt, c;
951
952         for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
953
954         return (len - cnt);
955 }
956
957 static int get_int_arg(char *ptr, int len, u_long *pv)
958 {
959         char *end;
960
961         *pv = simple_strtoul(ptr, &end, 10);
962         return (end - ptr);
963 }
964
965 static int is_keyword(char *ptr, int len, char *verb)
966 {
967         int verb_len = strlen(verb);
968
969         if (len >= verb_len && !memcmp(verb, ptr, verb_len))
970                 return verb_len;
971         else
972                 return 0;
973 }
974
975 #define SKIP_SPACES(ptr, len)                                           \
976         if ((arg_len = skip_spaces(ptr, len)) < 1)                      \
977                 return -EINVAL;                                         \
978         ptr += arg_len; len -= arg_len;
979
980 #define GET_INT_ARG(ptr, len, v)                                        \
981         if (!(arg_len = get_int_arg(ptr, len, &(v))))                   \
982                 return -EINVAL;                                         \
983         ptr += arg_len; len -= arg_len;
984
985
986 /*
987  * Parse a control command
988  */
989
990 static int sym_user_command(struct Scsi_Host *shost, char *buffer, int length)
991 {
992         struct sym_hcb *np = sym_get_hcb(shost);
993         char *ptr       = buffer;
994         int len         = length;
995         struct sym_usrcmd cmd, *uc = &cmd;
996         int             arg_len;
997         u_long          target;
998
999         memset(uc, 0, sizeof(*uc));
1000
1001         if (len > 0 && ptr[len-1] == '\n')
1002                 --len;
1003
1004         if      ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1005                 uc->cmd = UC_SETSYNC;
1006         else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1007                 uc->cmd = UC_SETTAGS;
1008         else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1009                 uc->cmd = UC_SETVERBOSE;
1010         else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1011                 uc->cmd = UC_SETWIDE;
1012 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1013         else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1014                 uc->cmd = UC_SETDEBUG;
1015 #endif
1016         else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1017                 uc->cmd = UC_SETFLAG;
1018         else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1019                 uc->cmd = UC_RESETDEV;
1020         else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1021                 uc->cmd = UC_CLEARDEV;
1022         else
1023                 arg_len = 0;
1024
1025 #ifdef DEBUG_PROC_INFO
1026 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1027 #endif
1028
1029         if (!arg_len)
1030                 return -EINVAL;
1031         ptr += arg_len; len -= arg_len;
1032
1033         switch(uc->cmd) {
1034         case UC_SETSYNC:
1035         case UC_SETTAGS:
1036         case UC_SETWIDE:
1037         case UC_SETFLAG:
1038         case UC_RESETDEV:
1039         case UC_CLEARDEV:
1040                 SKIP_SPACES(ptr, len);
1041                 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1042                         ptr += arg_len; len -= arg_len;
1043                         uc->target = ~0;
1044                 } else {
1045                         GET_INT_ARG(ptr, len, target);
1046                         uc->target = (1<<target);
1047 #ifdef DEBUG_PROC_INFO
1048 printk("sym_user_command: target=%ld\n", target);
1049 #endif
1050                 }
1051                 break;
1052         }
1053
1054         switch(uc->cmd) {
1055         case UC_SETVERBOSE:
1056         case UC_SETSYNC:
1057         case UC_SETTAGS:
1058         case UC_SETWIDE:
1059                 SKIP_SPACES(ptr, len);
1060                 GET_INT_ARG(ptr, len, uc->data);
1061 #ifdef DEBUG_PROC_INFO
1062 printk("sym_user_command: data=%ld\n", uc->data);
1063 #endif
1064                 break;
1065 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1066         case UC_SETDEBUG:
1067                 while (len > 0) {
1068                         SKIP_SPACES(ptr, len);
1069                         if      ((arg_len = is_keyword(ptr, len, "alloc")))
1070                                 uc->data |= DEBUG_ALLOC;
1071                         else if ((arg_len = is_keyword(ptr, len, "phase")))
1072                                 uc->data |= DEBUG_PHASE;
1073                         else if ((arg_len = is_keyword(ptr, len, "queue")))
1074                                 uc->data |= DEBUG_QUEUE;
1075                         else if ((arg_len = is_keyword(ptr, len, "result")))
1076                                 uc->data |= DEBUG_RESULT;
1077                         else if ((arg_len = is_keyword(ptr, len, "scatter")))
1078                                 uc->data |= DEBUG_SCATTER;
1079                         else if ((arg_len = is_keyword(ptr, len, "script")))
1080                                 uc->data |= DEBUG_SCRIPT;
1081                         else if ((arg_len = is_keyword(ptr, len, "tiny")))
1082                                 uc->data |= DEBUG_TINY;
1083                         else if ((arg_len = is_keyword(ptr, len, "timing")))
1084                                 uc->data |= DEBUG_TIMING;
1085                         else if ((arg_len = is_keyword(ptr, len, "nego")))
1086                                 uc->data |= DEBUG_NEGO;
1087                         else if ((arg_len = is_keyword(ptr, len, "tags")))
1088                                 uc->data |= DEBUG_TAGS;
1089                         else if ((arg_len = is_keyword(ptr, len, "pointer")))
1090                                 uc->data |= DEBUG_POINTER;
1091                         else
1092                                 return -EINVAL;
1093                         ptr += arg_len; len -= arg_len;
1094                 }
1095 #ifdef DEBUG_PROC_INFO
1096 printk("sym_user_command: data=%ld\n", uc->data);
1097 #endif
1098                 break;
1099 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1100         case UC_SETFLAG:
1101                 while (len > 0) {
1102                         SKIP_SPACES(ptr, len);
1103                         if      ((arg_len = is_keyword(ptr, len, "no_disc")))
1104                                 uc->data &= ~SYM_DISC_ENABLED;
1105                         else
1106                                 return -EINVAL;
1107                         ptr += arg_len; len -= arg_len;
1108                 }
1109                 break;
1110         default:
1111                 break;
1112         }
1113
1114         if (len)
1115                 return -EINVAL;
1116         else {
1117                 unsigned long flags;
1118
1119                 spin_lock_irqsave(shost->host_lock, flags);
1120                 sym_exec_user_command(np, uc);
1121                 spin_unlock_irqrestore(shost->host_lock, flags);
1122         }
1123         return length;
1124 }
1125
1126 #endif  /* SYM_LINUX_USER_COMMAND_SUPPORT */
1127
1128
1129 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1130 /*
1131  *  Informations through the proc file system.
1132  */
1133 struct info_str {
1134         char *buffer;
1135         int length;
1136         int offset;
1137         int pos;
1138 };
1139
1140 static void copy_mem_info(struct info_str *info, char *data, int len)
1141 {
1142         if (info->pos + len > info->length)
1143                 len = info->length - info->pos;
1144
1145         if (info->pos + len < info->offset) {
1146                 info->pos += len;
1147                 return;
1148         }
1149         if (info->pos < info->offset) {
1150                 data += (info->offset - info->pos);
1151                 len  -= (info->offset - info->pos);
1152         }
1153
1154         if (len > 0) {
1155                 memcpy(info->buffer + info->pos, data, len);
1156                 info->pos += len;
1157         }
1158 }
1159
1160 static int copy_info(struct info_str *info, char *fmt, ...)
1161 {
1162         va_list args;
1163         char buf[81];
1164         int len;
1165
1166         va_start(args, fmt);
1167         len = vsprintf(buf, fmt, args);
1168         va_end(args);
1169
1170         copy_mem_info(info, buf, len);
1171         return len;
1172 }
1173
1174 /*
1175  *  Copy formatted information into the input buffer.
1176  */
1177 static int sym_host_info(struct Scsi_Host *shost, char *ptr, off_t offset, int len)
1178 {
1179         struct sym_data *sym_data = shost_priv(shost);
1180         struct pci_dev *pdev = sym_data->pdev;
1181         struct sym_hcb *np = sym_data->ncb;
1182         struct info_str info;
1183
1184         info.buffer     = ptr;
1185         info.length     = len;
1186         info.offset     = offset;
1187         info.pos        = 0;
1188
1189         copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1190                          "revision id 0x%x\n", np->s.chip_name,
1191                          pdev->device, pdev->revision);
1192         copy_info(&info, "At PCI address %s, IRQ %u\n",
1193                          pci_name(pdev), pdev->irq);
1194         copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1195                          (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1196                          np->maxwide ? "Wide" : "Narrow",
1197                          np->minsync_dt ? ", DT capable" : "");
1198
1199         copy_info(&info, "Max. started commands %d, "
1200                          "max. commands per LUN %d\n",
1201                          SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1202
1203         return info.pos > info.offset? info.pos - info.offset : 0;
1204 }
1205 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1206
1207 /*
1208  *  Entry point of the scsi proc fs of the driver.
1209  *  - func = 0 means read  (returns adapter infos)
1210  *  - func = 1 means write (not yet merget from sym53c8xx)
1211  */
1212 static int sym53c8xx_proc_info(struct Scsi_Host *shost, char *buffer,
1213                         char **start, off_t offset, int length, int func)
1214 {
1215         int retv;
1216
1217         if (func) {
1218 #ifdef  SYM_LINUX_USER_COMMAND_SUPPORT
1219                 retv = sym_user_command(shost, buffer, length);
1220 #else
1221                 retv = -EINVAL;
1222 #endif
1223         } else {
1224                 if (start)
1225                         *start = buffer;
1226 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1227                 retv = sym_host_info(shost, buffer, offset, length);
1228 #else
1229                 retv = -EINVAL;
1230 #endif
1231         }
1232
1233         return retv;
1234 }
1235 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1236
1237 /*
1238  *      Free controller resources.
1239  */
1240 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev)
1241 {
1242         /*
1243          *  Free O/S specific resources.
1244          */
1245         if (pdev->irq)
1246                 free_irq(pdev->irq, np);
1247         if (np->s.ioaddr)
1248                 pci_iounmap(pdev, np->s.ioaddr);
1249         if (np->s.ramaddr)
1250                 pci_iounmap(pdev, np->s.ramaddr);
1251         /*
1252          *  Free O/S independent resources.
1253          */
1254         sym_hcb_free(np);
1255
1256         sym_mfree_dma(np, sizeof(*np), "HCB");
1257 }
1258
1259 /*
1260  *  Host attach and initialisations.
1261  *
1262  *  Allocate host data and ncb structure.
1263  *  Remap MMIO region.
1264  *  Do chip initialization.
1265  *  If all is OK, install interrupt handling and
1266  *  start the timer daemon.
1267  */
1268 static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1269                 int unit, struct sym_device *dev)
1270 {
1271         struct sym_data *sym_data;
1272         struct sym_hcb *np = NULL;
1273         struct Scsi_Host *shost;
1274         struct pci_dev *pdev = dev->pdev;
1275         unsigned long flags;
1276         struct sym_fw *fw;
1277
1278         printk(KERN_INFO "sym%d: <%s> rev 0x%x at pci %s irq %u\n",
1279                 unit, dev->chip.name, pdev->revision, pci_name(pdev),
1280                 pdev->irq);
1281
1282         /*
1283          *  Get the firmware for this chip.
1284          */
1285         fw = sym_find_firmware(&dev->chip);
1286         if (!fw)
1287                 return NULL;
1288
1289         shost = scsi_host_alloc(tpnt, sizeof(*sym_data));
1290         if (!shost)
1291                 return NULL;
1292         sym_data = shost_priv(shost);
1293
1294         /*
1295          *  Allocate immediately the host control block, 
1296          *  since we are only expecting to succeed. :)
1297          *  We keep track in the HCB of all the resources that 
1298          *  are to be released on error.
1299          */
1300         np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1301         if (!np)
1302                 goto attach_failed;
1303         np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1304         sym_data->ncb = np;
1305         sym_data->pdev = pdev;
1306         np->s.host = shost;
1307
1308         pci_set_drvdata(pdev, shost);
1309
1310         /*
1311          *  Copy some useful infos to the HCB.
1312          */
1313         np->hcb_ba      = vtobus(np);
1314         np->verbose     = sym_driver_setup.verbose;
1315         np->s.unit      = unit;
1316         np->features    = dev->chip.features;
1317         np->clock_divn  = dev->chip.nr_divisor;
1318         np->maxoffs     = dev->chip.offset_max;
1319         np->maxburst    = dev->chip.burst_max;
1320         np->myaddr      = dev->host_id;
1321
1322         /*
1323          *  Edit its name.
1324          */
1325         strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1326         sprintf(np->s.inst_name, "sym%d", np->s.unit);
1327
1328         if ((SYM_CONF_DMA_ADDRESSING_MODE > 0) && (np->features & FE_DAC) &&
1329                         !pci_set_dma_mask(pdev, DMA_DAC_MASK)) {
1330                 set_dac(np);
1331         } else if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
1332                 printf_warning("%s: No suitable DMA available\n", sym_name(np));
1333                 goto attach_failed;
1334         }
1335
1336         /*
1337          *  Try to map the controller chip to
1338          *  virtual and physical memory.
1339          */
1340         np->mmio_ba = (u32)dev->mmio_base;
1341         np->s.ioaddr    = dev->s.ioaddr;
1342         np->s.ramaddr   = dev->s.ramaddr;
1343
1344         /*
1345          *  Map on-chip RAM if present and supported.
1346          */
1347         if (!(np->features & FE_RAM))
1348                 dev->ram_base = 0;
1349         if (dev->ram_base)
1350                 np->ram_ba = (u32)dev->ram_base;
1351
1352         if (sym_hcb_attach(shost, fw, dev->nvram))
1353                 goto attach_failed;
1354
1355         /*
1356          *  Install the interrupt handler.
1357          *  If we synchonize the C code with SCRIPTS on interrupt, 
1358          *  we do not want to share the INTR line at all.
1359          */
1360         if (request_irq(pdev->irq, sym53c8xx_intr, IRQF_SHARED, NAME53C8XX,
1361                         shost)) {
1362                 printf_err("%s: request irq %u failure\n",
1363                         sym_name(np), pdev->irq);
1364                 goto attach_failed;
1365         }
1366
1367         /*
1368          *  After SCSI devices have been opened, we cannot
1369          *  reset the bus safely, so we do it here.
1370          */
1371         spin_lock_irqsave(shost->host_lock, flags);
1372         if (sym_reset_scsi_bus(np, 0))
1373                 goto reset_failed;
1374
1375         /*
1376          *  Start the SCRIPTS.
1377          */
1378         sym_start_up(shost, 1);
1379
1380         /*
1381          *  Start the timer daemon
1382          */
1383         init_timer(&np->s.timer);
1384         np->s.timer.data     = (unsigned long) np;
1385         np->s.timer.function = sym53c8xx_timer;
1386         np->s.lasttime=0;
1387         sym_timer (np);
1388
1389         /*
1390          *  Fill Linux host instance structure
1391          *  and return success.
1392          */
1393         shost->max_channel      = 0;
1394         shost->this_id          = np->myaddr;
1395         shost->max_id           = np->maxwide ? 16 : 8;
1396         shost->max_lun          = SYM_CONF_MAX_LUN;
1397         shost->unique_id        = pci_resource_start(pdev, 0);
1398         shost->cmd_per_lun      = SYM_CONF_MAX_TAG;
1399         shost->can_queue        = (SYM_CONF_MAX_START-2);
1400         shost->sg_tablesize     = SYM_CONF_MAX_SG;
1401         shost->max_cmd_len      = 16;
1402         BUG_ON(sym2_transport_template == NULL);
1403         shost->transportt       = sym2_transport_template;
1404
1405         /* 53c896 rev 1 errata: DMA may not cross 16MB boundary */
1406         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 2)
1407                 shost->dma_boundary = 0xFFFFFF;
1408
1409         spin_unlock_irqrestore(shost->host_lock, flags);
1410
1411         return shost;
1412
1413  reset_failed:
1414         printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1415                    "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1416         spin_unlock_irqrestore(shost->host_lock, flags);
1417  attach_failed:
1418         if (!shost)
1419                 return NULL;
1420         printf_info("%s: giving up ...\n", sym_name(np));
1421         if (np)
1422                 sym_free_resources(np, pdev);
1423         scsi_host_put(shost);
1424
1425         return NULL;
1426  }
1427
1428
1429 /*
1430  *    Detect and try to read SYMBIOS and TEKRAM NVRAM.
1431  */
1432 #if SYM_CONF_NVRAM_SUPPORT
1433 static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1434 {
1435         devp->nvram = nvp;
1436         nvp->type = 0;
1437
1438         sym_read_nvram(devp, nvp);
1439 }
1440 #else
1441 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1442 {
1443 }
1444 #endif  /* SYM_CONF_NVRAM_SUPPORT */
1445
1446 static int __devinit sym_check_supported(struct sym_device *device)
1447 {
1448         struct sym_chip *chip;
1449         struct pci_dev *pdev = device->pdev;
1450         unsigned long io_port = pci_resource_start(pdev, 0);
1451         int i;
1452
1453         /*
1454          *  If user excluded this chip, do not initialize it.
1455          *  I hate this code so much.  Must kill it.
1456          */
1457         if (io_port) {
1458                 for (i = 0 ; i < 8 ; i++) {
1459                         if (sym_driver_setup.excludes[i] == io_port)
1460                                 return -ENODEV;
1461                 }
1462         }
1463
1464         /*
1465          * Check if the chip is supported.  Then copy the chip description
1466          * to our device structure so we can make it match the actual device
1467          * and options.
1468          */
1469         chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1470         if (!chip) {
1471                 dev_info(&pdev->dev, "device not supported\n");
1472                 return -ENODEV;
1473         }
1474         memcpy(&device->chip, chip, sizeof(device->chip));
1475
1476         return 0;
1477 }
1478
1479 /*
1480  * Ignore Symbios chips controlled by various RAID controllers.
1481  * These controllers set value 0x52414944 at RAM end - 16.
1482  */
1483 static int __devinit sym_check_raid(struct sym_device *device)
1484 {
1485         unsigned int ram_size, ram_val;
1486
1487         if (!device->s.ramaddr)
1488                 return 0;
1489
1490         if (device->chip.features & FE_RAM8K)
1491                 ram_size = 8192;
1492         else
1493                 ram_size = 4096;
1494
1495         ram_val = readl(device->s.ramaddr + ram_size - 16);
1496         if (ram_val != 0x52414944)
1497                 return 0;
1498
1499         dev_info(&device->pdev->dev,
1500                         "not initializing, driven by RAID controller.\n");
1501         return -ENODEV;
1502 }
1503
1504 static int __devinit sym_set_workarounds(struct sym_device *device)
1505 {
1506         struct sym_chip *chip = &device->chip;
1507         struct pci_dev *pdev = device->pdev;
1508         u_short status_reg;
1509
1510         /*
1511          *  (ITEM 12 of a DEL about the 896 I haven't yet).
1512          *  We must ensure the chip will use WRITE AND INVALIDATE.
1513          *  The revision number limit is for now arbitrary.
1514          */
1515         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 0x4) {
1516                 chip->features  |= (FE_WRIE | FE_CLSE);
1517         }
1518
1519         /* If the chip can do Memory Write Invalidate, enable it */
1520         if (chip->features & FE_WRIE) {
1521                 if (pci_set_mwi(pdev))
1522                         return -ENODEV;
1523         }
1524
1525         /*
1526          *  Work around for errant bit in 895A. The 66Mhz
1527          *  capable bit is set erroneously. Clear this bit.
1528          *  (Item 1 DEL 533)
1529          *
1530          *  Make sure Config space and Features agree.
1531          *
1532          *  Recall: writes are not normal to status register -
1533          *  write a 1 to clear and a 0 to leave unchanged.
1534          *  Can only reset bits.
1535          */
1536         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1537         if (chip->features & FE_66MHZ) {
1538                 if (!(status_reg & PCI_STATUS_66MHZ))
1539                         chip->features &= ~FE_66MHZ;
1540         } else {
1541                 if (status_reg & PCI_STATUS_66MHZ) {
1542                         status_reg = PCI_STATUS_66MHZ;
1543                         pci_write_config_word(pdev, PCI_STATUS, status_reg);
1544                         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1545                 }
1546         }
1547
1548         return 0;
1549 }
1550
1551 /*
1552  *  Read and check the PCI configuration for any detected NCR 
1553  *  boards and save data for attaching after all boards have 
1554  *  been detected.
1555  */
1556 static void __devinit
1557 sym_init_device(struct pci_dev *pdev, struct sym_device *device)
1558 {
1559         int i = 2;
1560         struct pci_bus_region bus_addr;
1561
1562         device->host_id = SYM_SETUP_HOST_ID;
1563         device->pdev = pdev;
1564
1565         pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[1]);
1566         device->mmio_base = bus_addr.start;
1567
1568         /*
1569          * If the BAR is 64-bit, resource 2 will be occupied by the
1570          * upper 32 bits
1571          */
1572         if (!pdev->resource[i].flags)
1573                 i++;
1574         pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[i]);
1575         device->ram_base = bus_addr.start;
1576
1577 #ifdef CONFIG_SCSI_SYM53C8XX_MMIO
1578         if (device->mmio_base)
1579                 device->s.ioaddr = pci_iomap(pdev, 1,
1580                                                 pci_resource_len(pdev, 1));
1581 #endif
1582         if (!device->s.ioaddr)
1583                 device->s.ioaddr = pci_iomap(pdev, 0,
1584                                                 pci_resource_len(pdev, 0));
1585         if (device->ram_base)
1586                 device->s.ramaddr = pci_iomap(pdev, i,
1587                                                 pci_resource_len(pdev, i));
1588 }
1589
1590 /*
1591  * The NCR PQS and PDS cards are constructed as a DEC bridge
1592  * behind which sits a proprietary NCR memory controller and
1593  * either four or two 53c875s as separate devices.  We can tell
1594  * if an 875 is part of a PQS/PDS or not since if it is, it will
1595  * be on the same bus as the memory controller.  In its usual
1596  * mode of operation, the 875s are slaved to the memory
1597  * controller for all transfers.  To operate with the Linux
1598  * driver, the memory controller is disabled and the 875s
1599  * freed to function independently.  The only wrinkle is that
1600  * the preset SCSI ID (which may be zero) must be read in from
1601  * a special configuration space register of the 875.
1602  */
1603 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1604 {
1605         int slot;
1606         u8 tmp;
1607
1608         for (slot = 0; slot < 256; slot++) {
1609                 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1610
1611                 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1612                         pci_dev_put(memc);
1613                         continue;
1614                 }
1615
1616                 /* bit 1: allow individual 875 configuration */
1617                 pci_read_config_byte(memc, 0x44, &tmp);
1618                 if ((tmp & 0x2) == 0) {
1619                         tmp |= 0x2;
1620                         pci_write_config_byte(memc, 0x44, tmp);
1621                 }
1622
1623                 /* bit 2: drive individual 875 interrupts to the bus */
1624                 pci_read_config_byte(memc, 0x45, &tmp);
1625                 if ((tmp & 0x4) == 0) {
1626                         tmp |= 0x4;
1627                         pci_write_config_byte(memc, 0x45, tmp);
1628                 }
1629
1630                 pci_dev_put(memc);
1631                 break;
1632         }
1633
1634         pci_read_config_byte(pdev, 0x84, &tmp);
1635         sym_dev->host_id = tmp;
1636 }
1637
1638 /*
1639  *  Called before unloading the module.
1640  *  Detach the host.
1641  *  We have to free resources and halt the NCR chip.
1642  */
1643 static int sym_detach(struct Scsi_Host *shost, struct pci_dev *pdev)
1644 {
1645         struct sym_hcb *np = sym_get_hcb(shost);
1646         printk("%s: detaching ...\n", sym_name(np));
1647
1648         del_timer_sync(&np->s.timer);
1649
1650         /*
1651          * Reset NCR chip.
1652          * We should use sym_soft_reset(), but we don't want to do 
1653          * so, since we may not be safe if interrupts occur.
1654          */
1655         printk("%s: resetting chip\n", sym_name(np));
1656         OUTB(np, nc_istat, SRST);
1657         INB(np, nc_mbox1);
1658         udelay(10);
1659         OUTB(np, nc_istat, 0);
1660
1661         sym_free_resources(np, pdev);
1662
1663         return 1;
1664 }
1665
1666 /*
1667  * Driver host template.
1668  */
1669 static struct scsi_host_template sym2_template = {
1670         .module                 = THIS_MODULE,
1671         .name                   = "sym53c8xx",
1672         .info                   = sym53c8xx_info, 
1673         .queuecommand           = sym53c8xx_queue_command,
1674         .slave_alloc            = sym53c8xx_slave_alloc,
1675         .slave_configure        = sym53c8xx_slave_configure,
1676         .slave_destroy          = sym53c8xx_slave_destroy,
1677         .eh_abort_handler       = sym53c8xx_eh_abort_handler,
1678         .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1679         .eh_bus_reset_handler   = sym53c8xx_eh_bus_reset_handler,
1680         .eh_host_reset_handler  = sym53c8xx_eh_host_reset_handler,
1681         .this_id                = 7,
1682         .use_clustering         = ENABLE_CLUSTERING,
1683         .use_sg_chaining        = ENABLE_SG_CHAINING,
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 __devexit 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         sym_data->io_reset = NULL;
1883         spin_unlock_irq(shost->host_lock);
1884 }
1885
1886 static void sym2_get_signalling(struct Scsi_Host *shost)
1887 {
1888         struct sym_hcb *np = sym_get_hcb(shost);
1889         enum spi_signal_type type;
1890
1891         switch (np->scsi_mode) {
1892         case SMODE_SE:
1893                 type = SPI_SIGNAL_SE;
1894                 break;
1895         case SMODE_LVD:
1896                 type = SPI_SIGNAL_LVD;
1897                 break;
1898         case SMODE_HVD:
1899                 type = SPI_SIGNAL_HVD;
1900                 break;
1901         default:
1902                 type = SPI_SIGNAL_UNKNOWN;
1903                 break;
1904         }
1905         spi_signalling(shost) = type;
1906 }
1907
1908 static void sym2_set_offset(struct scsi_target *starget, int offset)
1909 {
1910         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1911         struct sym_hcb *np = sym_get_hcb(shost);
1912         struct sym_tcb *tp = &np->target[starget->id];
1913
1914         tp->tgoal.offset = offset;
1915         tp->tgoal.check_nego = 1;
1916 }
1917
1918 static void sym2_set_period(struct scsi_target *starget, int period)
1919 {
1920         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1921         struct sym_hcb *np = sym_get_hcb(shost);
1922         struct sym_tcb *tp = &np->target[starget->id];
1923
1924         /* have to have DT for these transfers, but DT will also
1925          * set width, so check that this is allowed */
1926         if (period <= np->minsync && spi_width(starget))
1927                 tp->tgoal.dt = 1;
1928
1929         tp->tgoal.period = period;
1930         tp->tgoal.check_nego = 1;
1931 }
1932
1933 static void sym2_set_width(struct scsi_target *starget, int width)
1934 {
1935         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1936         struct sym_hcb *np = sym_get_hcb(shost);
1937         struct sym_tcb *tp = &np->target[starget->id];
1938
1939         /* It is illegal to have DT set on narrow transfers.  If DT is
1940          * clear, we must also clear IU and QAS.  */
1941         if (width == 0)
1942                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1943
1944         tp->tgoal.width = width;
1945         tp->tgoal.check_nego = 1;
1946 }
1947
1948 static void sym2_set_dt(struct scsi_target *starget, int dt)
1949 {
1950         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1951         struct sym_hcb *np = sym_get_hcb(shost);
1952         struct sym_tcb *tp = &np->target[starget->id];
1953
1954         /* We must clear QAS and IU if DT is clear */
1955         if (dt)
1956                 tp->tgoal.dt = 1;
1957         else
1958                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1959         tp->tgoal.check_nego = 1;
1960 }
1961
1962 #if 0
1963 static void sym2_set_iu(struct scsi_target *starget, int iu)
1964 {
1965         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1966         struct sym_hcb *np = sym_get_hcb(shost);
1967         struct sym_tcb *tp = &np->target[starget->id];
1968
1969         if (iu)
1970                 tp->tgoal.iu = tp->tgoal.dt = 1;
1971         else
1972                 tp->tgoal.iu = 0;
1973         tp->tgoal.check_nego = 1;
1974 }
1975
1976 static void sym2_set_qas(struct scsi_target *starget, int qas)
1977 {
1978         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1979         struct sym_hcb *np = sym_get_hcb(shost);
1980         struct sym_tcb *tp = &np->target[starget->id];
1981
1982         if (qas)
1983                 tp->tgoal.dt = tp->tgoal.qas = 1;
1984         else
1985                 tp->tgoal.qas = 0;
1986         tp->tgoal.check_nego = 1;
1987 }
1988 #endif
1989
1990 static struct spi_function_template sym2_transport_functions = {
1991         .set_offset     = sym2_set_offset,
1992         .show_offset    = 1,
1993         .set_period     = sym2_set_period,
1994         .show_period    = 1,
1995         .set_width      = sym2_set_width,
1996         .show_width     = 1,
1997         .set_dt         = sym2_set_dt,
1998         .show_dt        = 1,
1999 #if 0
2000         .set_iu         = sym2_set_iu,
2001         .show_iu        = 1,
2002         .set_qas        = sym2_set_qas,
2003         .show_qas       = 1,
2004 #endif
2005         .get_signalling = sym2_get_signalling,
2006 };
2007
2008 static struct pci_device_id sym2_id_table[] __devinitdata = {
2009         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2010           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2011         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2012           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2013         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2014           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2015         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2016           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2017         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2018           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2019         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2020           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2021         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2022           PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL },
2023         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2024           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2025         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2026           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2027         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2028           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2029         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2030           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2031         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2032           PCI_ANY_ID, PCI_ANY_ID,  PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL }, /* new */
2033         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2034           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2035         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2036           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2037         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2038           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2039         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2040           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2041         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2042           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2043         { 0, }
2044 };
2045
2046 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2047
2048 static struct pci_error_handlers sym2_err_handler = {
2049         .error_detected = sym2_io_error_detected,
2050         .mmio_enabled   = sym2_io_slot_dump,
2051         .slot_reset     = sym2_io_slot_reset,
2052         .resume         = sym2_io_resume,
2053 };
2054
2055 static struct pci_driver sym2_driver = {
2056         .name           = NAME53C8XX,
2057         .id_table       = sym2_id_table,
2058         .probe          = sym2_probe,
2059         .remove         = __devexit_p(sym2_remove),
2060         .err_handler    = &sym2_err_handler,
2061 };
2062
2063 static int __init sym2_init(void)
2064 {
2065         int error;
2066
2067         sym2_setup_params();
2068         sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2069         if (!sym2_transport_template)
2070                 return -ENODEV;
2071
2072         error = pci_register_driver(&sym2_driver);
2073         if (error)
2074                 spi_release_transport(sym2_transport_template);
2075         return error;
2076 }
2077
2078 static void __exit sym2_exit(void)
2079 {
2080         pci_unregister_driver(&sym2_driver);
2081         spi_release_transport(sym2_transport_template);
2082 }
2083
2084 module_init(sym2_init);
2085 module_exit(sym2_exit);