Version:  2.0.40 2.2.26 2.4.37 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19

Linux/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_lck(struct scsi_cmnd *cmd,
509                                         void (*done)(struct scsi_cmnd *))
510 {
511         struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
512         struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
513         int sts = 0;
514 
515         cmd->scsi_done = done;
516         memset(ucp, 0, sizeof(*ucp));
517 
518         /*
519          *  Shorten our settle_time if needed for 
520          *  this command not to time out.
521          */
522         if (np->s.settle_time_valid && cmd->request->timeout) {
523                 unsigned long tlimit = jiffies + cmd->request->timeout;
524                 tlimit -= SYM_CONF_TIMER_INTERVAL*2;
525                 if (time_after(np->s.settle_time, tlimit)) {
526                         np->s.settle_time = tlimit;
527                 }
528         }
529 
530         if (np->s.settle_time_valid)
531                 return SCSI_MLQUEUE_HOST_BUSY;
532 
533         sts = sym_queue_command(np, cmd);
534         if (sts)
535                 return SCSI_MLQUEUE_HOST_BUSY;
536         return 0;
537 }
538 
539 static DEF_SCSI_QCMD(sym53c8xx_queue_command)
540 
541 /*
542  *  Linux entry point of the interrupt handler.
543  */
544 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id)
545 {
546         struct Scsi_Host *shost = dev_id;
547         struct sym_data *sym_data = shost_priv(shost);
548         irqreturn_t result;
549 
550         /* Avoid spinloop trying to handle interrupts on frozen device */
551         if (pci_channel_offline(sym_data->pdev))
552                 return IRQ_NONE;
553 
554         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
555 
556         spin_lock(shost->host_lock);
557         result = sym_interrupt(shost);
558         spin_unlock(shost->host_lock);
559 
560         if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
561 
562         return result;
563 }
564 
565 /*
566  *  Linux entry point of the timer handler
567  */
568 static void sym53c8xx_timer(unsigned long npref)
569 {
570         struct sym_hcb *np = (struct sym_hcb *)npref;
571         unsigned long flags;
572 
573         spin_lock_irqsave(np->s.host->host_lock, flags);
574         sym_timer(np);
575         spin_unlock_irqrestore(np->s.host->host_lock, flags);
576 }
577 
578 
579 /*
580  *  What the eh thread wants us to perform.
581  */
582 #define SYM_EH_ABORT            0
583 #define SYM_EH_DEVICE_RESET     1
584 #define SYM_EH_BUS_RESET        2
585 #define SYM_EH_HOST_RESET       3
586 
587 /*
588  *  Generic method for our eh processing.
589  *  The 'op' argument tells what we have to do.
590  */
591 static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
592 {
593         struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
594         struct Scsi_Host *shost = cmd->device->host;
595         struct sym_data *sym_data = shost_priv(shost);
596         struct pci_dev *pdev = sym_data->pdev;
597         struct sym_hcb *np = sym_data->ncb;
598         SYM_QUEHEAD *qp;
599         int cmd_queued = 0;
600         int sts = -1;
601         struct completion eh_done;
602 
603         scmd_printk(KERN_WARNING, cmd, "%s operation started\n", opname);
604 
605         /* We may be in an error condition because the PCI bus
606          * went down. In this case, we need to wait until the
607          * PCI bus is reset, the card is reset, and only then
608          * proceed with the scsi error recovery.  There's no
609          * point in hurrying; take a leisurely wait.
610          */
611 #define WAIT_FOR_PCI_RECOVERY   35
612         if (pci_channel_offline(pdev)) {
613                 int finished_reset = 0;
614                 init_completion(&eh_done);
615                 spin_lock_irq(shost->host_lock);
616                 /* Make sure we didn't race */
617                 if (pci_channel_offline(pdev)) {
618                         BUG_ON(sym_data->io_reset);
619                         sym_data->io_reset = &eh_done;
620                 } else {
621                         finished_reset = 1;
622                 }
623                 spin_unlock_irq(shost->host_lock);
624                 if (!finished_reset)
625                         finished_reset = wait_for_completion_timeout
626                                                 (sym_data->io_reset,
627                                                 WAIT_FOR_PCI_RECOVERY*HZ);
628                 spin_lock_irq(shost->host_lock);
629                 sym_data->io_reset = NULL;
630                 spin_unlock_irq(shost->host_lock);
631                 if (!finished_reset)
632                         return SCSI_FAILED;
633         }
634 
635         spin_lock_irq(shost->host_lock);
636         /* This one is queued in some place -> to wait for completion */
637         FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
638                 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
639                 if (cp->cmd == cmd) {
640                         cmd_queued = 1;
641                         break;
642                 }
643         }
644 
645         /* Try to proceed the operation we have been asked for */
646         sts = -1;
647         switch(op) {
648         case SYM_EH_ABORT:
649                 sts = sym_abort_scsiio(np, cmd, 1);
650                 break;
651         case SYM_EH_DEVICE_RESET:
652                 sts = sym_reset_scsi_target(np, cmd->device->id);
653                 break;
654         case SYM_EH_BUS_RESET:
655                 sym_reset_scsi_bus(np, 1);
656                 sts = 0;
657                 break;
658         case SYM_EH_HOST_RESET:
659                 sym_reset_scsi_bus(np, 0);
660                 sym_start_up(shost, 1);
661                 sts = 0;
662                 break;
663         default:
664                 break;
665         }
666 
667         /* On error, restore everything and cross fingers :) */
668         if (sts)
669                 cmd_queued = 0;
670 
671         if (cmd_queued) {
672                 init_completion(&eh_done);
673                 ucmd->eh_done = &eh_done;
674                 spin_unlock_irq(shost->host_lock);
675                 if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
676                         ucmd->eh_done = NULL;
677                         sts = -2;
678                 }
679         } else {
680                 spin_unlock_irq(shost->host_lock);
681         }
682 
683         dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
684                         sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
685         return sts ? SCSI_FAILED : SCSI_SUCCESS;
686 }
687 
688 
689 /*
690  * Error handlers called from the eh thread (one thread per HBA).
691  */
692 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
693 {
694         return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
695 }
696 
697 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
698 {
699         return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
700 }
701 
702 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
703 {
704         return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
705 }
706 
707 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
708 {
709         return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
710 }
711 
712 /*
713  *  Tune device queuing depth, according to various limits.
714  */
715 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
716 {
717         struct sym_lcb *lp = sym_lp(tp, lun);
718         u_short oldtags;
719 
720         if (!lp)
721                 return;
722 
723         oldtags = lp->s.reqtags;
724 
725         if (reqtags > lp->s.scdev_depth)
726                 reqtags = lp->s.scdev_depth;
727 
728         lp->s.reqtags     = reqtags;
729 
730         if (reqtags != oldtags) {
731                 dev_info(&tp->starget->dev,
732                          "tagged command queuing %s, command queue depth %d.\n",
733                           lp->s.reqtags ? "enabled" : "disabled", reqtags);
734         }
735 }
736 
737 static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
738 {
739         struct sym_hcb *np = sym_get_hcb(sdev->host);
740         struct sym_tcb *tp = &np->target[sdev->id];
741         struct sym_lcb *lp;
742         unsigned long flags;
743         int error;
744 
745         if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
746                 return -ENXIO;
747 
748         spin_lock_irqsave(np->s.host->host_lock, flags);
749 
750         /*
751          * Fail the device init if the device is flagged NOSCAN at BOOT in
752          * the NVRAM.  This may speed up boot and maintain coherency with
753          * BIOS device numbering.  Clearing the flag allows the user to
754          * rescan skipped devices later.  We also return an error for
755          * devices not flagged for SCAN LUNS in the NVRAM since some single
756          * lun devices behave badly when asked for a non zero LUN.
757          */
758 
759         if (tp->usrflags & SYM_SCAN_BOOT_DISABLED) {
760                 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
761                 starget_printk(KERN_INFO, sdev->sdev_target,
762                                 "Scan at boot disabled in NVRAM\n");
763                 error = -ENXIO;
764                 goto out;
765         }
766 
767         if (tp->usrflags & SYM_SCAN_LUNS_DISABLED) {
768                 if (sdev->lun != 0) {
769                         error = -ENXIO;
770                         goto out;
771                 }
772                 starget_printk(KERN_INFO, sdev->sdev_target,
773                                 "Multiple LUNs disabled in NVRAM\n");
774         }
775 
776         lp = sym_alloc_lcb(np, sdev->id, sdev->lun);
777         if (!lp) {
778                 error = -ENOMEM;
779                 goto out;
780         }
781         if (tp->nlcb == 1)
782                 tp->starget = sdev->sdev_target;
783 
784         spi_min_period(tp->starget) = tp->usr_period;
785         spi_max_width(tp->starget) = tp->usr_width;
786 
787         error = 0;
788 out:
789         spin_unlock_irqrestore(np->s.host->host_lock, flags);
790 
791         return error;
792 }
793 
794 /*
795  * Linux entry point for device queue sizing.
796  */
797 static int sym53c8xx_slave_configure(struct scsi_device *sdev)
798 {
799         struct sym_hcb *np = sym_get_hcb(sdev->host);
800         struct sym_tcb *tp = &np->target[sdev->id];
801         struct sym_lcb *lp = sym_lp(tp, sdev->lun);
802         int reqtags, depth_to_use;
803 
804         /*
805          *  Get user flags.
806          */
807         lp->curr_flags = lp->user_flags;
808 
809         /*
810          *  Select queue depth from driver setup.
811          *  Do not use more than configured by user.
812          *  Use at least 1.
813          *  Do not use more than our maximum.
814          */
815         reqtags = sym_driver_setup.max_tag;
816         if (reqtags > tp->usrtags)
817                 reqtags = tp->usrtags;
818         if (!sdev->tagged_supported)
819                 reqtags = 0;
820         if (reqtags > SYM_CONF_MAX_TAG)
821                 reqtags = SYM_CONF_MAX_TAG;
822         depth_to_use = reqtags ? reqtags : 1;
823         scsi_change_queue_depth(sdev, depth_to_use);
824         lp->s.scdev_depth = depth_to_use;
825         sym_tune_dev_queuing(tp, sdev->lun, reqtags);
826 
827         if (!spi_initial_dv(sdev->sdev_target))
828                 spi_dv_device(sdev);
829 
830         return 0;
831 }
832 
833 static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
834 {
835         struct sym_hcb *np = sym_get_hcb(sdev->host);
836         struct sym_tcb *tp = &np->target[sdev->id];
837         struct sym_lcb *lp = sym_lp(tp, sdev->lun);
838         unsigned long flags;
839 
840         /* if slave_alloc returned before allocating a sym_lcb, return */
841         if (!lp)
842                 return;
843 
844         spin_lock_irqsave(np->s.host->host_lock, flags);
845 
846         if (lp->busy_itlq || lp->busy_itl) {
847                 /*
848                  * This really shouldn't happen, but we can't return an error
849                  * so let's try to stop all on-going I/O.
850                  */
851                 starget_printk(KERN_WARNING, tp->starget,
852                                "Removing busy LCB (%d)\n", (u8)sdev->lun);
853                 sym_reset_scsi_bus(np, 1);
854         }
855 
856         if (sym_free_lcb(np, sdev->id, sdev->lun) == 0) {
857                 /*
858                  * It was the last unit for this target.
859                  */
860                 tp->head.sval        = 0;
861                 tp->head.wval        = np->rv_scntl3;
862                 tp->head.uval        = 0;
863                 tp->tgoal.check_nego = 1;
864                 tp->starget          = NULL;
865         }
866 
867         spin_unlock_irqrestore(np->s.host->host_lock, flags);
868 }
869 
870 /*
871  *  Linux entry point for info() function
872  */
873 static const char *sym53c8xx_info (struct Scsi_Host *host)
874 {
875         return SYM_DRIVER_NAME;
876 }
877 
878 
879 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
880 /*
881  *  Proc file system stuff
882  *
883  *  A read operation returns adapter information.
884  *  A write operation is a control command.
885  *  The string is parsed in the driver code and the command is passed 
886  *  to the sym_usercmd() function.
887  */
888 
889 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
890 
891 struct  sym_usrcmd {
892         u_long  target;
893         u_long  lun;
894         u_long  data;
895         u_long  cmd;
896 };
897 
898 #define UC_SETSYNC      10
899 #define UC_SETTAGS      11
900 #define UC_SETDEBUG     12
901 #define UC_SETWIDE      14
902 #define UC_SETFLAG      15
903 #define UC_SETVERBOSE   17
904 #define UC_RESETDEV     18
905 #define UC_CLEARDEV     19
906 
907 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
908 {
909         struct sym_tcb *tp;
910         int t, l;
911 
912         switch (uc->cmd) {
913         case 0: return;
914 
915 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
916         case UC_SETDEBUG:
917                 sym_debug_flags = uc->data;
918                 break;
919 #endif
920         case UC_SETVERBOSE:
921                 np->verbose = uc->data;
922                 break;
923         default:
924                 /*
925                  * We assume that other commands apply to targets.
926                  * This should always be the case and avoid the below 
927                  * 4 lines to be repeated 6 times.
928                  */
929                 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
930                         if (!((uc->target >> t) & 1))
931                                 continue;
932                         tp = &np->target[t];
933                         if (!tp->nlcb)
934                                 continue;
935 
936                         switch (uc->cmd) {
937 
938                         case UC_SETSYNC:
939                                 if (!uc->data || uc->data >= 255) {
940                                         tp->tgoal.iu = tp->tgoal.dt =
941                                                 tp->tgoal.qas = 0;
942                                         tp->tgoal.offset = 0;
943                                 } else if (uc->data <= 9 && np->minsync_dt) {
944                                         if (uc->data < np->minsync_dt)
945                                                 uc->data = np->minsync_dt;
946                                         tp->tgoal.iu = tp->tgoal.dt =
947                                                 tp->tgoal.qas = 1;
948                                         tp->tgoal.width = 1;
949                                         tp->tgoal.period = uc->data;
950                                         tp->tgoal.offset = np->maxoffs_dt;
951                                 } else {
952                                         if (uc->data < np->minsync)
953                                                 uc->data = np->minsync;
954                                         tp->tgoal.iu = tp->tgoal.dt =
955                                                 tp->tgoal.qas = 0;
956                                         tp->tgoal.period = uc->data;
957                                         tp->tgoal.offset = np->maxoffs;
958                                 }
959                                 tp->tgoal.check_nego = 1;
960                                 break;
961                         case UC_SETWIDE:
962                                 tp->tgoal.width = uc->data ? 1 : 0;
963                                 tp->tgoal.check_nego = 1;
964                                 break;
965                         case UC_SETTAGS:
966                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
967                                         sym_tune_dev_queuing(tp, l, uc->data);
968                                 break;
969                         case UC_RESETDEV:
970                                 tp->to_reset = 1;
971                                 np->istat_sem = SEM;
972                                 OUTB(np, nc_istat, SIGP|SEM);
973                                 break;
974                         case UC_CLEARDEV:
975                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
976                                         struct sym_lcb *lp = sym_lp(tp, l);
977                                         if (lp) lp->to_clear = 1;
978                                 }
979                                 np->istat_sem = SEM;
980                                 OUTB(np, nc_istat, SIGP|SEM);
981                                 break;
982                         case UC_SETFLAG:
983                                 tp->usrflags = uc->data;
984                                 break;
985                         }
986                 }
987                 break;
988         }
989 }
990 
991 static int sym_skip_spaces(char *ptr, int len)
992 {
993         int cnt, c;
994 
995         for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
996 
997         return (len - cnt);
998 }
999 
1000 static int get_int_arg(char *ptr, int len, u_long *pv)
1001 {
1002         char *end;
1003 
1004         *pv = simple_strtoul(ptr, &end, 10);
1005         return (end - ptr);
1006 }
1007 
1008 static int is_keyword(char *ptr, int len, char *verb)
1009 {
1010         int verb_len = strlen(verb);
1011 
1012         if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1013                 return verb_len;
1014         else
1015                 return 0;
1016 }
1017 
1018 #define SKIP_SPACES(ptr, len)                                           \
1019         if ((arg_len = sym_skip_spaces(ptr, len)) < 1)                  \
1020                 return -EINVAL;                                         \
1021         ptr += arg_len; len -= arg_len;
1022 
1023 #define GET_INT_ARG(ptr, len, v)                                        \
1024         if (!(arg_len = get_int_arg(ptr, len, &(v))))                   \
1025                 return -EINVAL;                                         \
1026         ptr += arg_len; len -= arg_len;
1027 
1028 
1029 /*
1030  * Parse a control command
1031  */
1032 
1033 static int sym_user_command(struct Scsi_Host *shost, char *buffer, int length)
1034 {
1035         struct sym_hcb *np = sym_get_hcb(shost);
1036         char *ptr       = buffer;
1037         int len         = length;
1038         struct sym_usrcmd cmd, *uc = &cmd;
1039         int             arg_len;
1040         u_long          target;
1041 
1042         memset(uc, 0, sizeof(*uc));
1043 
1044         if (len > 0 && ptr[len-1] == '\n')
1045                 --len;
1046 
1047         if      ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1048                 uc->cmd = UC_SETSYNC;
1049         else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1050                 uc->cmd = UC_SETTAGS;
1051         else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1052                 uc->cmd = UC_SETVERBOSE;
1053         else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1054                 uc->cmd = UC_SETWIDE;
1055 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1056         else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1057                 uc->cmd = UC_SETDEBUG;
1058 #endif
1059         else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1060                 uc->cmd = UC_SETFLAG;
1061         else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1062                 uc->cmd = UC_RESETDEV;
1063         else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1064                 uc->cmd = UC_CLEARDEV;
1065         else
1066                 arg_len = 0;
1067 
1068 #ifdef DEBUG_PROC_INFO
1069 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1070 #endif
1071 
1072         if (!arg_len)
1073                 return -EINVAL;
1074         ptr += arg_len; len -= arg_len;
1075 
1076         switch(uc->cmd) {
1077         case UC_SETSYNC:
1078         case UC_SETTAGS:
1079         case UC_SETWIDE:
1080         case UC_SETFLAG:
1081         case UC_RESETDEV:
1082         case UC_CLEARDEV:
1083                 SKIP_SPACES(ptr, len);
1084                 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1085                         ptr += arg_len; len -= arg_len;
1086                         uc->target = ~0;
1087                 } else {
1088                         GET_INT_ARG(ptr, len, target);
1089                         uc->target = (1<<target);
1090 #ifdef DEBUG_PROC_INFO
1091 printk("sym_user_command: target=%ld\n", target);
1092 #endif
1093                 }
1094                 break;
1095         }
1096 
1097         switch(uc->cmd) {
1098         case UC_SETVERBOSE:
1099         case UC_SETSYNC:
1100         case UC_SETTAGS:
1101         case UC_SETWIDE:
1102                 SKIP_SPACES(ptr, len);
1103                 GET_INT_ARG(ptr, len, uc->data);
1104 #ifdef DEBUG_PROC_INFO
1105 printk("sym_user_command: data=%ld\n", uc->data);
1106 #endif
1107                 break;
1108 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1109         case UC_SETDEBUG:
1110                 while (len > 0) {
1111                         SKIP_SPACES(ptr, len);
1112                         if      ((arg_len = is_keyword(ptr, len, "alloc")))
1113                                 uc->data |= DEBUG_ALLOC;
1114                         else if ((arg_len = is_keyword(ptr, len, "phase")))
1115                                 uc->data |= DEBUG_PHASE;
1116                         else if ((arg_len = is_keyword(ptr, len, "queue")))
1117                                 uc->data |= DEBUG_QUEUE;
1118                         else if ((arg_len = is_keyword(ptr, len, "result")))
1119                                 uc->data |= DEBUG_RESULT;
1120                         else if ((arg_len = is_keyword(ptr, len, "scatter")))
1121                                 uc->data |= DEBUG_SCATTER;
1122                         else if ((arg_len = is_keyword(ptr, len, "script")))
1123                                 uc->data |= DEBUG_SCRIPT;
1124                         else if ((arg_len = is_keyword(ptr, len, "tiny")))
1125                                 uc->data |= DEBUG_TINY;
1126                         else if ((arg_len = is_keyword(ptr, len, "timing")))
1127                                 uc->data |= DEBUG_TIMING;
1128                         else if ((arg_len = is_keyword(ptr, len, "nego")))
1129                                 uc->data |= DEBUG_NEGO;
1130                         else if ((arg_len = is_keyword(ptr, len, "tags")))
1131                                 uc->data |= DEBUG_TAGS;
1132                         else if ((arg_len = is_keyword(ptr, len, "pointer")))
1133                                 uc->data |= DEBUG_POINTER;
1134                         else
1135                                 return -EINVAL;
1136                         ptr += arg_len; len -= arg_len;
1137                 }
1138 #ifdef DEBUG_PROC_INFO
1139 printk("sym_user_command: data=%ld\n", uc->data);
1140 #endif
1141                 break;
1142 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1143         case UC_SETFLAG:
1144                 while (len > 0) {
1145                         SKIP_SPACES(ptr, len);
1146                         if      ((arg_len = is_keyword(ptr, len, "no_disc")))
1147                                 uc->data &= ~SYM_DISC_ENABLED;
1148                         else
1149                                 return -EINVAL;
1150                         ptr += arg_len; len -= arg_len;
1151                 }
1152                 break;
1153         default:
1154                 break;
1155         }
1156 
1157         if (len)
1158                 return -EINVAL;
1159         else {
1160                 unsigned long flags;
1161 
1162                 spin_lock_irqsave(shost->host_lock, flags);
1163                 sym_exec_user_command(np, uc);
1164                 spin_unlock_irqrestore(shost->host_lock, flags);
1165         }
1166         return length;
1167 }
1168 
1169 #endif  /* SYM_LINUX_USER_COMMAND_SUPPORT */
1170 
1171 
1172 /*
1173  *  Copy formatted information into the input buffer.
1174  */
1175 static int sym_show_info(struct seq_file *m, struct Scsi_Host *shost)
1176 {
1177 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1178         struct sym_data *sym_data = shost_priv(shost);
1179         struct pci_dev *pdev = sym_data->pdev;
1180         struct sym_hcb *np = sym_data->ncb;
1181 
1182         seq_printf(m, "Chip " NAME53C "%s, device id 0x%x, "
1183                  "revision id 0x%x\n", np->s.chip_name,
1184                  pdev->device, pdev->revision);
1185         seq_printf(m, "At PCI address %s, IRQ %u\n",
1186                          pci_name(pdev), pdev->irq);
1187         seq_printf(m, "Min. period factor %d, %s SCSI BUS%s\n",
1188                  (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1189                  np->maxwide ? "Wide" : "Narrow",
1190                  np->minsync_dt ? ", DT capable" : "");
1191 
1192         seq_printf(m, "Max. started commands %d, "
1193                  "max. commands per LUN %d\n",
1194                  SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1195 
1196         return 0;
1197 #else
1198         return -EINVAL;
1199 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1200 }
1201 
1202 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1203 
1204 /*
1205  * Free resources claimed by sym_iomap_device().  Note that
1206  * sym_free_resources() should be used instead of this function after calling
1207  * sym_attach().
1208  */
1209 static void sym_iounmap_device(struct sym_device *device)
1210 {
1211         if (device->s.ioaddr)
1212                 pci_iounmap(device->pdev, device->s.ioaddr);
1213         if (device->s.ramaddr)
1214                 pci_iounmap(device->pdev, device->s.ramaddr);
1215 }
1216 
1217 /*
1218  *      Free controller resources.
1219  */
1220 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev,
1221                 int do_free_irq)
1222 {
1223         /*
1224          *  Free O/S specific resources.
1225          */
1226         if (do_free_irq)
1227                 free_irq(pdev->irq, np->s.host);
1228         if (np->s.ioaddr)
1229                 pci_iounmap(pdev, np->s.ioaddr);
1230         if (np->s.ramaddr)
1231                 pci_iounmap(pdev, np->s.ramaddr);
1232         /*
1233          *  Free O/S independent resources.
1234          */
1235         sym_hcb_free(np);
1236 
1237         sym_mfree_dma(np, sizeof(*np), "HCB");
1238 }
1239 
1240 /*
1241  *  Host attach and initialisations.
1242  *
1243  *  Allocate host data and ncb structure.
1244  *  Remap MMIO region.
1245  *  Do chip initialization.
1246  *  If all is OK, install interrupt handling and
1247  *  start the timer daemon.
1248  */
1249 static struct Scsi_Host *sym_attach(struct scsi_host_template *tpnt, int unit,
1250                                     struct sym_device *dev)
1251 {
1252         struct sym_data *sym_data;
1253         struct sym_hcb *np = NULL;
1254         struct Scsi_Host *shost = NULL;
1255         struct pci_dev *pdev = dev->pdev;
1256         unsigned long flags;
1257         struct sym_fw *fw;
1258         int do_free_irq = 0;
1259 
1260         printk(KERN_INFO "sym%d: <%s> rev 0x%x at pci %s irq %u\n",
1261                 unit, dev->chip.name, pdev->revision, pci_name(pdev),
1262                 pdev->irq);
1263 
1264         /*
1265          *  Get the firmware for this chip.
1266          */
1267         fw = sym_find_firmware(&dev->chip);
1268         if (!fw)
1269                 goto attach_failed;
1270 
1271         shost = scsi_host_alloc(tpnt, sizeof(*sym_data));
1272         if (!shost)
1273                 goto attach_failed;
1274         sym_data = shost_priv(shost);
1275 
1276         /*
1277          *  Allocate immediately the host control block, 
1278          *  since we are only expecting to succeed. :)
1279          *  We keep track in the HCB of all the resources that 
1280          *  are to be released on error.
1281          */
1282         np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1283         if (!np)
1284                 goto attach_failed;
1285         np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1286         sym_data->ncb = np;
1287         sym_data->pdev = pdev;
1288         np->s.host = shost;
1289 
1290         pci_set_drvdata(pdev, shost);
1291 
1292         /*
1293          *  Copy some useful infos to the HCB.
1294          */
1295         np->hcb_ba      = vtobus(np);
1296         np->verbose     = sym_driver_setup.verbose;
1297         np->s.unit      = unit;
1298         np->features    = dev->chip.features;
1299         np->clock_divn  = dev->chip.nr_divisor;
1300         np->maxoffs     = dev->chip.offset_max;
1301         np->maxburst    = dev->chip.burst_max;
1302         np->myaddr      = dev->host_id;
1303         np->mmio_ba     = (u32)dev->mmio_base;
1304         np->ram_ba      = (u32)dev->ram_base;
1305         np->s.ioaddr    = dev->s.ioaddr;
1306         np->s.ramaddr   = dev->s.ramaddr;
1307 
1308         /*
1309          *  Edit its name.
1310          */
1311         strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1312         sprintf(np->s.inst_name, "sym%d", np->s.unit);
1313 
1314         if ((SYM_CONF_DMA_ADDRESSING_MODE > 0) && (np->features & FE_DAC) &&
1315                         !pci_set_dma_mask(pdev, DMA_DAC_MASK)) {
1316                 set_dac(np);
1317         } else if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
1318                 printf_warning("%s: No suitable DMA available\n", sym_name(np));
1319                 goto attach_failed;
1320         }
1321 
1322         if (sym_hcb_attach(shost, fw, dev->nvram))
1323                 goto attach_failed;
1324 
1325         /*
1326          *  Install the interrupt handler.
1327          *  If we synchonize the C code with SCRIPTS on interrupt, 
1328          *  we do not want to share the INTR line at all.
1329          */
1330         if (request_irq(pdev->irq, sym53c8xx_intr, IRQF_SHARED, NAME53C8XX,
1331                         shost)) {
1332                 printf_err("%s: request irq %u failure\n",
1333                         sym_name(np), pdev->irq);
1334                 goto attach_failed;
1335         }
1336         do_free_irq = 1;
1337 
1338         /*
1339          *  After SCSI devices have been opened, we cannot
1340          *  reset the bus safely, so we do it here.
1341          */
1342         spin_lock_irqsave(shost->host_lock, flags);
1343         if (sym_reset_scsi_bus(np, 0))
1344                 goto reset_failed;
1345 
1346         /*
1347          *  Start the SCRIPTS.
1348          */
1349         sym_start_up(shost, 1);
1350 
1351         /*
1352          *  Start the timer daemon
1353          */
1354         init_timer(&np->s.timer);
1355         np->s.timer.data     = (unsigned long) np;
1356         np->s.timer.function = sym53c8xx_timer;
1357         np->s.lasttime=0;
1358         sym_timer (np);
1359 
1360         /*
1361          *  Fill Linux host instance structure
1362          *  and return success.
1363          */
1364         shost->max_channel      = 0;
1365         shost->this_id          = np->myaddr;
1366         shost->max_id           = np->maxwide ? 16 : 8;
1367         shost->max_lun          = SYM_CONF_MAX_LUN;
1368         shost->unique_id        = pci_resource_start(pdev, 0);
1369         shost->cmd_per_lun      = SYM_CONF_MAX_TAG;
1370         shost->can_queue        = (SYM_CONF_MAX_START-2);
1371         shost->sg_tablesize     = SYM_CONF_MAX_SG;
1372         shost->max_cmd_len      = 16;
1373         BUG_ON(sym2_transport_template == NULL);
1374         shost->transportt       = sym2_transport_template;
1375 
1376         /* 53c896 rev 1 errata: DMA may not cross 16MB boundary */
1377         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 2)
1378                 shost->dma_boundary = 0xFFFFFF;
1379 
1380         spin_unlock_irqrestore(shost->host_lock, flags);
1381 
1382         return shost;
1383 
1384  reset_failed:
1385         printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1386                    "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1387         spin_unlock_irqrestore(shost->host_lock, flags);
1388  attach_failed:
1389         printf_info("sym%d: giving up ...\n", unit);
1390         if (np)
1391                 sym_free_resources(np, pdev, do_free_irq);
1392         else
1393                 sym_iounmap_device(dev);
1394         if (shost)
1395                 scsi_host_put(shost);
1396 
1397         return NULL;
1398  }
1399 
1400 
1401 /*
1402  *    Detect and try to read SYMBIOS and TEKRAM NVRAM.
1403  */
1404 #if SYM_CONF_NVRAM_SUPPORT
1405 static void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1406 {
1407         devp->nvram = nvp;
1408         nvp->type = 0;
1409 
1410         sym_read_nvram(devp, nvp);
1411 }
1412 #else
1413 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1414 {
1415 }
1416 #endif  /* SYM_CONF_NVRAM_SUPPORT */
1417 
1418 static int sym_check_supported(struct sym_device *device)
1419 {
1420         struct sym_chip *chip;
1421         struct pci_dev *pdev = device->pdev;
1422         unsigned long io_port = pci_resource_start(pdev, 0);
1423         int i;
1424 
1425         /*
1426          *  If user excluded this chip, do not initialize it.
1427          *  I hate this code so much.  Must kill it.
1428          */
1429         if (io_port) {
1430                 for (i = 0 ; i < 8 ; i++) {
1431                         if (sym_driver_setup.excludes[i] == io_port)
1432                                 return -ENODEV;
1433                 }
1434         }
1435 
1436         /*
1437          * Check if the chip is supported.  Then copy the chip description
1438          * to our device structure so we can make it match the actual device
1439          * and options.
1440          */
1441         chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1442         if (!chip) {
1443                 dev_info(&pdev->dev, "device not supported\n");
1444                 return -ENODEV;
1445         }
1446         memcpy(&device->chip, chip, sizeof(device->chip));
1447 
1448         return 0;
1449 }
1450 
1451 /*
1452  * Ignore Symbios chips controlled by various RAID controllers.
1453  * These controllers set value 0x52414944 at RAM end - 16.
1454  */
1455 static int sym_check_raid(struct sym_device *device)
1456 {
1457         unsigned int ram_size, ram_val;
1458 
1459         if (!device->s.ramaddr)
1460                 return 0;
1461 
1462         if (device->chip.features & FE_RAM8K)
1463                 ram_size = 8192;
1464         else
1465                 ram_size = 4096;
1466 
1467         ram_val = readl(device->s.ramaddr + ram_size - 16);
1468         if (ram_val != 0x52414944)
1469                 return 0;
1470 
1471         dev_info(&device->pdev->dev,
1472                         "not initializing, driven by RAID controller.\n");
1473         return -ENODEV;
1474 }
1475 
1476 static int sym_set_workarounds(struct sym_device *device)
1477 {
1478         struct sym_chip *chip = &device->chip;
1479         struct pci_dev *pdev = device->pdev;
1480         u_short status_reg;
1481 
1482         /*
1483          *  (ITEM 12 of a DEL about the 896 I haven't yet).
1484          *  We must ensure the chip will use WRITE AND INVALIDATE.
1485          *  The revision number limit is for now arbitrary.
1486          */
1487         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 0x4) {
1488                 chip->features  |= (FE_WRIE | FE_CLSE);
1489         }
1490 
1491         /* If the chip can do Memory Write Invalidate, enable it */
1492         if (chip->features & FE_WRIE) {
1493                 if (pci_set_mwi(pdev))
1494                         return -ENODEV;
1495         }
1496 
1497         /*
1498          *  Work around for errant bit in 895A. The 66Mhz
1499          *  capable bit is set erroneously. Clear this bit.
1500          *  (Item 1 DEL 533)
1501          *
1502          *  Make sure Config space and Features agree.
1503          *
1504          *  Recall: writes are not normal to status register -
1505          *  write a 1 to clear and a 0 to leave unchanged.
1506          *  Can only reset bits.
1507          */
1508         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1509         if (chip->features & FE_66MHZ) {
1510                 if (!(status_reg & PCI_STATUS_66MHZ))
1511                         chip->features &= ~FE_66MHZ;
1512         } else {
1513                 if (status_reg & PCI_STATUS_66MHZ) {
1514                         status_reg = PCI_STATUS_66MHZ;
1515                         pci_write_config_word(pdev, PCI_STATUS, status_reg);
1516                         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1517                 }
1518         }
1519 
1520         return 0;
1521 }
1522 
1523 /*
1524  * Map HBA registers and on-chip SRAM (if present).
1525  */
1526 static int sym_iomap_device(struct sym_device *device)
1527 {
1528         struct pci_dev *pdev = device->pdev;
1529         struct pci_bus_region bus_addr;
1530         int i = 2;
1531 
1532         pcibios_resource_to_bus(pdev->bus, &bus_addr, &pdev->resource[1]);
1533         device->mmio_base = bus_addr.start;
1534 
1535         if (device->chip.features & FE_RAM) {
1536                 /*
1537                  * If the BAR is 64-bit, resource 2 will be occupied by the
1538                  * upper 32 bits
1539                  */
1540                 if (!pdev->resource[i].flags)
1541                         i++;
1542                 pcibios_resource_to_bus(pdev->bus, &bus_addr,
1543                                         &pdev->resource[i]);
1544                 device->ram_base = bus_addr.start;
1545         }
1546 
1547 #ifdef CONFIG_SCSI_SYM53C8XX_MMIO
1548         if (device->mmio_base)
1549                 device->s.ioaddr = pci_iomap(pdev, 1,
1550                                                 pci_resource_len(pdev, 1));
1551 #endif
1552         if (!device->s.ioaddr)
1553                 device->s.ioaddr = pci_iomap(pdev, 0,
1554                                                 pci_resource_len(pdev, 0));
1555         if (!device->s.ioaddr) {
1556                 dev_err(&pdev->dev, "could not map registers; giving up.\n");
1557                 return -EIO;
1558         }
1559         if (device->ram_base) {
1560                 device->s.ramaddr = pci_iomap(pdev, i,
1561                                                 pci_resource_len(pdev, i));
1562                 if (!device->s.ramaddr) {
1563                         dev_warn(&pdev->dev,
1564                                 "could not map SRAM; continuing anyway.\n");
1565                         device->ram_base = 0;
1566                 }
1567         }
1568 
1569         return 0;
1570 }
1571 
1572 /*
1573  * The NCR PQS and PDS cards are constructed as a DEC bridge
1574  * behind which sits a proprietary NCR memory controller and
1575  * either four or two 53c875s as separate devices.  We can tell
1576  * if an 875 is part of a PQS/PDS or not since if it is, it will
1577  * be on the same bus as the memory controller.  In its usual
1578  * mode of operation, the 875s are slaved to the memory
1579  * controller for all transfers.  To operate with the Linux
1580  * driver, the memory controller is disabled and the 875s
1581  * freed to function independently.  The only wrinkle is that
1582  * the preset SCSI ID (which may be zero) must be read in from
1583  * a special configuration space register of the 875.
1584  */
1585 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1586 {
1587         int slot;
1588         u8 tmp;
1589 
1590         for (slot = 0; slot < 256; slot++) {
1591                 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1592 
1593                 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1594                         pci_dev_put(memc);
1595                         continue;
1596                 }
1597 
1598                 /* bit 1: allow individual 875 configuration */
1599                 pci_read_config_byte(memc, 0x44, &tmp);
1600                 if ((tmp & 0x2) == 0) {
1601                         tmp |= 0x2;
1602                         pci_write_config_byte(memc, 0x44, tmp);
1603                 }
1604 
1605                 /* bit 2: drive individual 875 interrupts to the bus */
1606                 pci_read_config_byte(memc, 0x45, &tmp);
1607                 if ((tmp & 0x4) == 0) {
1608                         tmp |= 0x4;
1609                         pci_write_config_byte(memc, 0x45, tmp);
1610                 }
1611 
1612                 pci_dev_put(memc);
1613                 break;
1614         }
1615 
1616         pci_read_config_byte(pdev, 0x84, &tmp);
1617         sym_dev->host_id = tmp;
1618 }
1619 
1620 /*
1621  *  Called before unloading the module.
1622  *  Detach the host.
1623  *  We have to free resources and halt the NCR chip.
1624  */
1625 static int sym_detach(struct Scsi_Host *shost, struct pci_dev *pdev)
1626 {
1627         struct sym_hcb *np = sym_get_hcb(shost);
1628         printk("%s: detaching ...\n", sym_name(np));
1629 
1630         del_timer_sync(&np->s.timer);
1631 
1632         /*
1633          * Reset NCR chip.
1634          * We should use sym_soft_reset(), but we don't want to do 
1635          * so, since we may not be safe if interrupts occur.
1636          */
1637         printk("%s: resetting chip\n", sym_name(np));
1638         OUTB(np, nc_istat, SRST);
1639         INB(np, nc_mbox1);
1640         udelay(10);
1641         OUTB(np, nc_istat, 0);
1642 
1643         sym_free_resources(np, pdev, 1);
1644         scsi_host_put(shost);
1645 
1646         return 1;
1647 }
1648 
1649 /*
1650  * Driver host template.
1651  */
1652 static struct scsi_host_template sym2_template = {
1653         .module                 = THIS_MODULE,
1654         .name                   = "sym53c8xx",
1655         .info                   = sym53c8xx_info, 
1656         .queuecommand           = sym53c8xx_queue_command,
1657         .slave_alloc            = sym53c8xx_slave_alloc,
1658         .slave_configure        = sym53c8xx_slave_configure,
1659         .slave_destroy          = sym53c8xx_slave_destroy,
1660         .eh_abort_handler       = sym53c8xx_eh_abort_handler,
1661         .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1662         .eh_bus_reset_handler   = sym53c8xx_eh_bus_reset_handler,
1663         .eh_host_reset_handler  = sym53c8xx_eh_host_reset_handler,
1664         .this_id                = 7,
1665         .use_clustering         = ENABLE_CLUSTERING,
1666         .max_sectors            = 0xFFFF,
1667 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1668         .show_info              = sym_show_info,
1669 #ifdef  SYM_LINUX_USER_COMMAND_SUPPORT
1670         .write_info             = sym_user_command,
1671 #endif
1672         .proc_name              = NAME53C8XX,
1673 #endif
1674 };
1675 
1676 static int attach_count;
1677 
1678 static int sym2_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1679 {
1680         struct sym_device sym_dev;
1681         struct sym_nvram nvram;
1682         struct Scsi_Host *shost;
1683         int do_iounmap = 0;
1684         int do_disable_device = 1;
1685 
1686         memset(&sym_dev, 0, sizeof(sym_dev));
1687         memset(&nvram, 0, sizeof(nvram));
1688         sym_dev.pdev = pdev;
1689         sym_dev.host_id = SYM_SETUP_HOST_ID;
1690 
1691         if (pci_enable_device(pdev))
1692                 goto leave;
1693 
1694         pci_set_master(pdev);
1695 
1696         if (pci_request_regions(pdev, NAME53C8XX))
1697                 goto disable;
1698 
1699         if (sym_check_supported(&sym_dev))
1700                 goto free;
1701 
1702         if (sym_iomap_device(&sym_dev))
1703                 goto free;
1704         do_iounmap = 1;
1705 
1706         if (sym_check_raid(&sym_dev)) {
1707                 do_disable_device = 0;  /* Don't disable the device */
1708                 goto free;
1709         }
1710 
1711         if (sym_set_workarounds(&sym_dev))
1712                 goto free;
1713 
1714         sym_config_pqs(pdev, &sym_dev);
1715 
1716         sym_get_nvram(&sym_dev, &nvram);
1717 
1718         do_iounmap = 0; /* Don't sym_iounmap_device() after sym_attach(). */
1719         shost = sym_attach(&sym2_template, attach_count, &sym_dev);
1720         if (!shost)
1721                 goto free;
1722 
1723         if (scsi_add_host(shost, &pdev->dev))
1724                 goto detach;
1725         scsi_scan_host(shost);
1726 
1727         attach_count++;
1728 
1729         return 0;
1730 
1731  detach:
1732         sym_detach(pci_get_drvdata(pdev), pdev);
1733  free:
1734         if (do_iounmap)
1735                 sym_iounmap_device(&sym_dev);
1736         pci_release_regions(pdev);
1737  disable:
1738         if (do_disable_device)
1739                 pci_disable_device(pdev);
1740  leave:
1741         return -ENODEV;
1742 }
1743 
1744 static void sym2_remove(struct pci_dev *pdev)
1745 {
1746         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1747 
1748         scsi_remove_host(shost);
1749         sym_detach(shost, pdev);
1750         pci_release_regions(pdev);
1751         pci_disable_device(pdev);
1752 
1753         attach_count--;
1754 }
1755 
1756 /**
1757  * sym2_io_error_detected() - called when PCI error is detected
1758  * @pdev: pointer to PCI device
1759  * @state: current state of the PCI slot
1760  */
1761 static pci_ers_result_t sym2_io_error_detected(struct pci_dev *pdev,
1762                                          enum pci_channel_state state)
1763 {
1764         /* If slot is permanently frozen, turn everything off */
1765         if (state == pci_channel_io_perm_failure) {
1766                 sym2_remove(pdev);
1767                 return PCI_ERS_RESULT_DISCONNECT;
1768         }
1769 
1770         disable_irq(pdev->irq);
1771         pci_disable_device(pdev);
1772 
1773         /* Request that MMIO be enabled, so register dump can be taken. */
1774         return PCI_ERS_RESULT_CAN_RECOVER;
1775 }
1776 
1777 /**
1778  * sym2_io_slot_dump - Enable MMIO and dump debug registers
1779  * @pdev: pointer to PCI device
1780  */
1781 static pci_ers_result_t sym2_io_slot_dump(struct pci_dev *pdev)
1782 {
1783         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1784 
1785         sym_dump_registers(shost);
1786 
1787         /* Request a slot reset. */
1788         return PCI_ERS_RESULT_NEED_RESET;
1789 }
1790 
1791 /**
1792  * sym2_reset_workarounds - hardware-specific work-arounds
1793  *
1794  * This routine is similar to sym_set_workarounds(), except
1795  * that, at this point, we already know that the device was
1796  * successfully initialized at least once before, and so most
1797  * of the steps taken there are un-needed here.
1798  */
1799 static void sym2_reset_workarounds(struct pci_dev *pdev)
1800 {
1801         u_short status_reg;
1802         struct sym_chip *chip;
1803 
1804         chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1805 
1806         /* Work around for errant bit in 895A, in a fashion
1807          * similar to what is done in sym_set_workarounds().
1808          */
1809         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1810         if (!(chip->features & FE_66MHZ) && (status_reg & PCI_STATUS_66MHZ)) {
1811                 status_reg = PCI_STATUS_66MHZ;
1812                 pci_write_config_word(pdev, PCI_STATUS, status_reg);
1813                 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1814         }
1815 }
1816 
1817 /**
1818  * sym2_io_slot_reset() - called when the pci bus has been reset.
1819  * @pdev: pointer to PCI device
1820  *
1821  * Restart the card from scratch.
1822  */
1823 static pci_ers_result_t sym2_io_slot_reset(struct pci_dev *pdev)
1824 {
1825         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1826         struct sym_hcb *np = sym_get_hcb(shost);
1827 
1828         printk(KERN_INFO "%s: recovering from a PCI slot reset\n",
1829                   sym_name(np));
1830 
1831         if (pci_enable_device(pdev)) {
1832                 printk(KERN_ERR "%s: Unable to enable after PCI reset\n",
1833                         sym_name(np));
1834                 return PCI_ERS_RESULT_DISCONNECT;
1835         }
1836 
1837         pci_set_master(pdev);
1838         enable_irq(pdev->irq);
1839 
1840         /* If the chip can do Memory Write Invalidate, enable it */
1841         if (np->features & FE_WRIE) {
1842                 if (pci_set_mwi(pdev))
1843                         return PCI_ERS_RESULT_DISCONNECT;
1844         }
1845 
1846         /* Perform work-arounds, analogous to sym_set_workarounds() */
1847         sym2_reset_workarounds(pdev);
1848 
1849         /* Perform host reset only on one instance of the card */
1850         if (PCI_FUNC(pdev->devfn) == 0) {
1851                 if (sym_reset_scsi_bus(np, 0)) {
1852                         printk(KERN_ERR "%s: Unable to reset scsi host\n",
1853                                 sym_name(np));
1854                         return PCI_ERS_RESULT_DISCONNECT;
1855                 }
1856                 sym_start_up(shost, 1);
1857         }
1858 
1859         return PCI_ERS_RESULT_RECOVERED;
1860 }
1861 
1862 /**
1863  * sym2_io_resume() - resume normal ops after PCI reset
1864  * @pdev: pointer to PCI device
1865  *
1866  * Called when the error recovery driver tells us that its
1867  * OK to resume normal operation. Use completion to allow
1868  * halted scsi ops to resume.
1869  */
1870 static void sym2_io_resume(struct pci_dev *pdev)
1871 {
1872         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1873         struct sym_data *sym_data = shost_priv(shost);
1874 
1875         spin_lock_irq(shost->host_lock);
1876         if (sym_data->io_reset)
1877                 complete_all(sym_data->io_reset);
1878         spin_unlock_irq(shost->host_lock);
1879 }
1880 
1881 static void sym2_get_signalling(struct Scsi_Host *shost)
1882 {
1883         struct sym_hcb *np = sym_get_hcb(shost);
1884         enum spi_signal_type type;
1885 
1886         switch (np->scsi_mode) {
1887         case SMODE_SE:
1888                 type = SPI_SIGNAL_SE;
1889                 break;
1890         case SMODE_LVD:
1891                 type = SPI_SIGNAL_LVD;
1892                 break;
1893         case SMODE_HVD:
1894                 type = SPI_SIGNAL_HVD;
1895                 break;
1896         default:
1897                 type = SPI_SIGNAL_UNKNOWN;
1898                 break;
1899         }
1900         spi_signalling(shost) = type;
1901 }
1902 
1903 static void sym2_set_offset(struct scsi_target *starget, int offset)
1904 {
1905         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1906         struct sym_hcb *np = sym_get_hcb(shost);
1907         struct sym_tcb *tp = &np->target[starget->id];
1908 
1909         tp->tgoal.offset = offset;
1910         tp->tgoal.check_nego = 1;
1911 }
1912 
1913 static void sym2_set_period(struct scsi_target *starget, int period)
1914 {
1915         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1916         struct sym_hcb *np = sym_get_hcb(shost);
1917         struct sym_tcb *tp = &np->target[starget->id];
1918 
1919         /* have to have DT for these transfers, but DT will also
1920          * set width, so check that this is allowed */
1921         if (period <= np->minsync && spi_width(starget))
1922                 tp->tgoal.dt = 1;
1923 
1924         tp->tgoal.period = period;
1925         tp->tgoal.check_nego = 1;
1926 }
1927 
1928 static void sym2_set_width(struct scsi_target *starget, int width)
1929 {
1930         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1931         struct sym_hcb *np = sym_get_hcb(shost);
1932         struct sym_tcb *tp = &np->target[starget->id];
1933 
1934         /* It is illegal to have DT set on narrow transfers.  If DT is
1935          * clear, we must also clear IU and QAS.  */
1936         if (width == 0)
1937                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1938 
1939         tp->tgoal.width = width;
1940         tp->tgoal.check_nego = 1;
1941 }
1942 
1943 static void sym2_set_dt(struct scsi_target *starget, int dt)
1944 {
1945         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1946         struct sym_hcb *np = sym_get_hcb(shost);
1947         struct sym_tcb *tp = &np->target[starget->id];
1948 
1949         /* We must clear QAS and IU if DT is clear */
1950         if (dt)
1951                 tp->tgoal.dt = 1;
1952         else
1953                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1954         tp->tgoal.check_nego = 1;
1955 }
1956 
1957 #if 0
1958 static void sym2_set_iu(struct scsi_target *starget, int iu)
1959 {
1960         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1961         struct sym_hcb *np = sym_get_hcb(shost);
1962         struct sym_tcb *tp = &np->target[starget->id];
1963 
1964         if (iu)
1965                 tp->tgoal.iu = tp->tgoal.dt = 1;
1966         else
1967                 tp->tgoal.iu = 0;
1968         tp->tgoal.check_nego = 1;
1969 }
1970 
1971 static void sym2_set_qas(struct scsi_target *starget, int qas)
1972 {
1973         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1974         struct sym_hcb *np = sym_get_hcb(shost);
1975         struct sym_tcb *tp = &np->target[starget->id];
1976 
1977         if (qas)
1978                 tp->tgoal.dt = tp->tgoal.qas = 1;
1979         else
1980                 tp->tgoal.qas = 0;
1981         tp->tgoal.check_nego = 1;
1982 }
1983 #endif
1984 
1985 static struct spi_function_template sym2_transport_functions = {
1986         .set_offset     = sym2_set_offset,
1987         .show_offset    = 1,
1988         .set_period     = sym2_set_period,
1989         .show_period    = 1,
1990         .set_width      = sym2_set_width,
1991         .show_width     = 1,
1992         .set_dt         = sym2_set_dt,
1993         .show_dt        = 1,
1994 #if 0
1995         .set_iu         = sym2_set_iu,
1996         .show_iu        = 1,
1997         .set_qas        = sym2_set_qas,
1998         .show_qas       = 1,
1999 #endif
2000         .get_signalling = sym2_get_signalling,
2001 };
2002 
2003 static struct pci_device_id sym2_id_table[] = {
2004         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2005           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2006         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2007           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2008         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2009           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2010         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2011           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2012         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2013           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2014         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2015           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2016         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2017           PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL },
2018         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2019           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2020         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2021           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2022         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2023           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2024         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2025           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2026         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2027           PCI_ANY_ID, PCI_ANY_ID,  PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL }, /* new */
2028         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2029           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2030         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2031           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2032         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2033           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2034         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2035           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2036         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2037           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2038         { 0, }
2039 };
2040 
2041 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2042 
2043 static const struct pci_error_handlers sym2_err_handler = {
2044         .error_detected = sym2_io_error_detected,
2045         .mmio_enabled   = sym2_io_slot_dump,
2046         .slot_reset     = sym2_io_slot_reset,
2047         .resume         = sym2_io_resume,
2048 };
2049 
2050 static struct pci_driver sym2_driver = {
2051         .name           = NAME53C8XX,
2052         .id_table       = sym2_id_table,
2053         .probe          = sym2_probe,
2054         .remove         = sym2_remove,
2055         .err_handler    = &sym2_err_handler,
2056 };
2057 
2058 static int __init sym2_init(void)
2059 {
2060         int error;
2061 
2062         sym2_setup_params();
2063         sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2064         if (!sym2_transport_template)
2065                 return -ENODEV;
2066 
2067         error = pci_register_driver(&sym2_driver);
2068         if (error)
2069                 spi_release_transport(sym2_transport_template);
2070         return error;
2071 }
2072 
2073 static void __exit sym2_exit(void)
2074 {
2075         pci_unregister_driver(&sym2_driver);
2076         spi_release_transport(sym2_transport_template);
2077 }
2078 
2079 module_init(sym2_init);
2080 module_exit(sym2_exit);
2081 

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