Version:  2.0.40 2.2.26 2.4.37 3.2 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

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_adjust_queue_depth(sdev,
824                                 sdev->tagged_supported ? MSG_SIMPLE_TAG : 0,
825                                 depth_to_use);
826         lp->s.scdev_depth = depth_to_use;
827         sym_tune_dev_queuing(tp, sdev->lun, reqtags);
828 
829         if (!spi_initial_dv(sdev->sdev_target))
830                 spi_dv_device(sdev);
831 
832         return 0;
833 }
834 
835 static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
836 {
837         struct sym_hcb *np = sym_get_hcb(sdev->host);
838         struct sym_tcb *tp = &np->target[sdev->id];
839         struct sym_lcb *lp = sym_lp(tp, sdev->lun);
840         unsigned long flags;
841 
842         /* if slave_alloc returned before allocating a sym_lcb, return */
843         if (!lp)
844                 return;
845 
846         spin_lock_irqsave(np->s.host->host_lock, flags);
847 
848         if (lp->busy_itlq || lp->busy_itl) {
849                 /*
850                  * This really shouldn't happen, but we can't return an error
851                  * so let's try to stop all on-going I/O.
852                  */
853                 starget_printk(KERN_WARNING, tp->starget,
854                                "Removing busy LCB (%d)\n", (u8)sdev->lun);
855                 sym_reset_scsi_bus(np, 1);
856         }
857 
858         if (sym_free_lcb(np, sdev->id, sdev->lun) == 0) {
859                 /*
860                  * It was the last unit for this target.
861                  */
862                 tp->head.sval        = 0;
863                 tp->head.wval        = np->rv_scntl3;
864                 tp->head.uval        = 0;
865                 tp->tgoal.check_nego = 1;
866                 tp->starget          = NULL;
867         }
868 
869         spin_unlock_irqrestore(np->s.host->host_lock, flags);
870 }
871 
872 /*
873  *  Linux entry point for info() function
874  */
875 static const char *sym53c8xx_info (struct Scsi_Host *host)
876 {
877         return SYM_DRIVER_NAME;
878 }
879 
880 
881 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
882 /*
883  *  Proc file system stuff
884  *
885  *  A read operation returns adapter information.
886  *  A write operation is a control command.
887  *  The string is parsed in the driver code and the command is passed 
888  *  to the sym_usercmd() function.
889  */
890 
891 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
892 
893 struct  sym_usrcmd {
894         u_long  target;
895         u_long  lun;
896         u_long  data;
897         u_long  cmd;
898 };
899 
900 #define UC_SETSYNC      10
901 #define UC_SETTAGS      11
902 #define UC_SETDEBUG     12
903 #define UC_SETWIDE      14
904 #define UC_SETFLAG      15
905 #define UC_SETVERBOSE   17
906 #define UC_RESETDEV     18
907 #define UC_CLEARDEV     19
908 
909 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
910 {
911         struct sym_tcb *tp;
912         int t, l;
913 
914         switch (uc->cmd) {
915         case 0: return;
916 
917 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
918         case UC_SETDEBUG:
919                 sym_debug_flags = uc->data;
920                 break;
921 #endif
922         case UC_SETVERBOSE:
923                 np->verbose = uc->data;
924                 break;
925         default:
926                 /*
927                  * We assume that other commands apply to targets.
928                  * This should always be the case and avoid the below 
929                  * 4 lines to be repeated 6 times.
930                  */
931                 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
932                         if (!((uc->target >> t) & 1))
933                                 continue;
934                         tp = &np->target[t];
935                         if (!tp->nlcb)
936                                 continue;
937 
938                         switch (uc->cmd) {
939 
940                         case UC_SETSYNC:
941                                 if (!uc->data || uc->data >= 255) {
942                                         tp->tgoal.iu = tp->tgoal.dt =
943                                                 tp->tgoal.qas = 0;
944                                         tp->tgoal.offset = 0;
945                                 } else if (uc->data <= 9 && np->minsync_dt) {
946                                         if (uc->data < np->minsync_dt)
947                                                 uc->data = np->minsync_dt;
948                                         tp->tgoal.iu = tp->tgoal.dt =
949                                                 tp->tgoal.qas = 1;
950                                         tp->tgoal.width = 1;
951                                         tp->tgoal.period = uc->data;
952                                         tp->tgoal.offset = np->maxoffs_dt;
953                                 } else {
954                                         if (uc->data < np->minsync)
955                                                 uc->data = np->minsync;
956                                         tp->tgoal.iu = tp->tgoal.dt =
957                                                 tp->tgoal.qas = 0;
958                                         tp->tgoal.period = uc->data;
959                                         tp->tgoal.offset = np->maxoffs;
960                                 }
961                                 tp->tgoal.check_nego = 1;
962                                 break;
963                         case UC_SETWIDE:
964                                 tp->tgoal.width = uc->data ? 1 : 0;
965                                 tp->tgoal.check_nego = 1;
966                                 break;
967                         case UC_SETTAGS:
968                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
969                                         sym_tune_dev_queuing(tp, l, uc->data);
970                                 break;
971                         case UC_RESETDEV:
972                                 tp->to_reset = 1;
973                                 np->istat_sem = SEM;
974                                 OUTB(np, nc_istat, SIGP|SEM);
975                                 break;
976                         case UC_CLEARDEV:
977                                 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
978                                         struct sym_lcb *lp = sym_lp(tp, l);
979                                         if (lp) lp->to_clear = 1;
980                                 }
981                                 np->istat_sem = SEM;
982                                 OUTB(np, nc_istat, SIGP|SEM);
983                                 break;
984                         case UC_SETFLAG:
985                                 tp->usrflags = uc->data;
986                                 break;
987                         }
988                 }
989                 break;
990         }
991 }
992 
993 static int sym_skip_spaces(char *ptr, int len)
994 {
995         int cnt, c;
996 
997         for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
998 
999         return (len - cnt);
1000 }
1001 
1002 static int get_int_arg(char *ptr, int len, u_long *pv)
1003 {
1004         char *end;
1005 
1006         *pv = simple_strtoul(ptr, &end, 10);
1007         return (end - ptr);
1008 }
1009 
1010 static int is_keyword(char *ptr, int len, char *verb)
1011 {
1012         int verb_len = strlen(verb);
1013 
1014         if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1015                 return verb_len;
1016         else
1017                 return 0;
1018 }
1019 
1020 #define SKIP_SPACES(ptr, len)                                           \
1021         if ((arg_len = sym_skip_spaces(ptr, len)) < 1)                  \
1022                 return -EINVAL;                                         \
1023         ptr += arg_len; len -= arg_len;
1024 
1025 #define GET_INT_ARG(ptr, len, v)                                        \
1026         if (!(arg_len = get_int_arg(ptr, len, &(v))))                   \
1027                 return -EINVAL;                                         \
1028         ptr += arg_len; len -= arg_len;
1029 
1030 
1031 /*
1032  * Parse a control command
1033  */
1034 
1035 static int sym_user_command(struct Scsi_Host *shost, char *buffer, int length)
1036 {
1037         struct sym_hcb *np = sym_get_hcb(shost);
1038         char *ptr       = buffer;
1039         int len         = length;
1040         struct sym_usrcmd cmd, *uc = &cmd;
1041         int             arg_len;
1042         u_long          target;
1043 
1044         memset(uc, 0, sizeof(*uc));
1045 
1046         if (len > 0 && ptr[len-1] == '\n')
1047                 --len;
1048 
1049         if      ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1050                 uc->cmd = UC_SETSYNC;
1051         else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1052                 uc->cmd = UC_SETTAGS;
1053         else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1054                 uc->cmd = UC_SETVERBOSE;
1055         else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1056                 uc->cmd = UC_SETWIDE;
1057 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1058         else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1059                 uc->cmd = UC_SETDEBUG;
1060 #endif
1061         else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1062                 uc->cmd = UC_SETFLAG;
1063         else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1064                 uc->cmd = UC_RESETDEV;
1065         else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1066                 uc->cmd = UC_CLEARDEV;
1067         else
1068                 arg_len = 0;
1069 
1070 #ifdef DEBUG_PROC_INFO
1071 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1072 #endif
1073 
1074         if (!arg_len)
1075                 return -EINVAL;
1076         ptr += arg_len; len -= arg_len;
1077 
1078         switch(uc->cmd) {
1079         case UC_SETSYNC:
1080         case UC_SETTAGS:
1081         case UC_SETWIDE:
1082         case UC_SETFLAG:
1083         case UC_RESETDEV:
1084         case UC_CLEARDEV:
1085                 SKIP_SPACES(ptr, len);
1086                 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1087                         ptr += arg_len; len -= arg_len;
1088                         uc->target = ~0;
1089                 } else {
1090                         GET_INT_ARG(ptr, len, target);
1091                         uc->target = (1<<target);
1092 #ifdef DEBUG_PROC_INFO
1093 printk("sym_user_command: target=%ld\n", target);
1094 #endif
1095                 }
1096                 break;
1097         }
1098 
1099         switch(uc->cmd) {
1100         case UC_SETVERBOSE:
1101         case UC_SETSYNC:
1102         case UC_SETTAGS:
1103         case UC_SETWIDE:
1104                 SKIP_SPACES(ptr, len);
1105                 GET_INT_ARG(ptr, len, uc->data);
1106 #ifdef DEBUG_PROC_INFO
1107 printk("sym_user_command: data=%ld\n", uc->data);
1108 #endif
1109                 break;
1110 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1111         case UC_SETDEBUG:
1112                 while (len > 0) {
1113                         SKIP_SPACES(ptr, len);
1114                         if      ((arg_len = is_keyword(ptr, len, "alloc")))
1115                                 uc->data |= DEBUG_ALLOC;
1116                         else if ((arg_len = is_keyword(ptr, len, "phase")))
1117                                 uc->data |= DEBUG_PHASE;
1118                         else if ((arg_len = is_keyword(ptr, len, "queue")))
1119                                 uc->data |= DEBUG_QUEUE;
1120                         else if ((arg_len = is_keyword(ptr, len, "result")))
1121                                 uc->data |= DEBUG_RESULT;
1122                         else if ((arg_len = is_keyword(ptr, len, "scatter")))
1123                                 uc->data |= DEBUG_SCATTER;
1124                         else if ((arg_len = is_keyword(ptr, len, "script")))
1125                                 uc->data |= DEBUG_SCRIPT;
1126                         else if ((arg_len = is_keyword(ptr, len, "tiny")))
1127                                 uc->data |= DEBUG_TINY;
1128                         else if ((arg_len = is_keyword(ptr, len, "timing")))
1129                                 uc->data |= DEBUG_TIMING;
1130                         else if ((arg_len = is_keyword(ptr, len, "nego")))
1131                                 uc->data |= DEBUG_NEGO;
1132                         else if ((arg_len = is_keyword(ptr, len, "tags")))
1133                                 uc->data |= DEBUG_TAGS;
1134                         else if ((arg_len = is_keyword(ptr, len, "pointer")))
1135                                 uc->data |= DEBUG_POINTER;
1136                         else
1137                                 return -EINVAL;
1138                         ptr += arg_len; len -= arg_len;
1139                 }
1140 #ifdef DEBUG_PROC_INFO
1141 printk("sym_user_command: data=%ld\n", uc->data);
1142 #endif
1143                 break;
1144 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1145         case UC_SETFLAG:
1146                 while (len > 0) {
1147                         SKIP_SPACES(ptr, len);
1148                         if      ((arg_len = is_keyword(ptr, len, "no_disc")))
1149                                 uc->data &= ~SYM_DISC_ENABLED;
1150                         else
1151                                 return -EINVAL;
1152                         ptr += arg_len; len -= arg_len;
1153                 }
1154                 break;
1155         default:
1156                 break;
1157         }
1158 
1159         if (len)
1160                 return -EINVAL;
1161         else {
1162                 unsigned long flags;
1163 
1164                 spin_lock_irqsave(shost->host_lock, flags);
1165                 sym_exec_user_command(np, uc);
1166                 spin_unlock_irqrestore(shost->host_lock, flags);
1167         }
1168         return length;
1169 }
1170 
1171 #endif  /* SYM_LINUX_USER_COMMAND_SUPPORT */
1172 
1173 
1174 /*
1175  *  Copy formatted information into the input buffer.
1176  */
1177 static int sym_show_info(struct seq_file *m, struct Scsi_Host *shost)
1178 {
1179 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1180         struct sym_data *sym_data = shost_priv(shost);
1181         struct pci_dev *pdev = sym_data->pdev;
1182         struct sym_hcb *np = sym_data->ncb;
1183 
1184         seq_printf(m, "Chip " NAME53C "%s, device id 0x%x, "
1185                  "revision id 0x%x\n", np->s.chip_name,
1186                  pdev->device, pdev->revision);
1187         seq_printf(m, "At PCI address %s, IRQ %u\n",
1188                          pci_name(pdev), pdev->irq);
1189         seq_printf(m, "Min. period factor %d, %s SCSI BUS%s\n",
1190                  (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1191                  np->maxwide ? "Wide" : "Narrow",
1192                  np->minsync_dt ? ", DT capable" : "");
1193 
1194         seq_printf(m, "Max. started commands %d, "
1195                  "max. commands per LUN %d\n",
1196                  SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1197 
1198         return 0;
1199 #else
1200         return -EINVAL;
1201 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1202 }
1203 
1204 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1205 
1206 /*
1207  * Free resources claimed by sym_iomap_device().  Note that
1208  * sym_free_resources() should be used instead of this function after calling
1209  * sym_attach().
1210  */
1211 static void sym_iounmap_device(struct sym_device *device)
1212 {
1213         if (device->s.ioaddr)
1214                 pci_iounmap(device->pdev, device->s.ioaddr);
1215         if (device->s.ramaddr)
1216                 pci_iounmap(device->pdev, device->s.ramaddr);
1217 }
1218 
1219 /*
1220  *      Free controller resources.
1221  */
1222 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev,
1223                 int do_free_irq)
1224 {
1225         /*
1226          *  Free O/S specific resources.
1227          */
1228         if (do_free_irq)
1229                 free_irq(pdev->irq, np->s.host);
1230         if (np->s.ioaddr)
1231                 pci_iounmap(pdev, np->s.ioaddr);
1232         if (np->s.ramaddr)
1233                 pci_iounmap(pdev, np->s.ramaddr);
1234         /*
1235          *  Free O/S independent resources.
1236          */
1237         sym_hcb_free(np);
1238 
1239         sym_mfree_dma(np, sizeof(*np), "HCB");
1240 }
1241 
1242 /*
1243  *  Host attach and initialisations.
1244  *
1245  *  Allocate host data and ncb structure.
1246  *  Remap MMIO region.
1247  *  Do chip initialization.
1248  *  If all is OK, install interrupt handling and
1249  *  start the timer daemon.
1250  */
1251 static struct Scsi_Host *sym_attach(struct scsi_host_template *tpnt, int unit,
1252                                     struct sym_device *dev)
1253 {
1254         struct sym_data *sym_data;
1255         struct sym_hcb *np = NULL;
1256         struct Scsi_Host *shost = NULL;
1257         struct pci_dev *pdev = dev->pdev;
1258         unsigned long flags;
1259         struct sym_fw *fw;
1260         int do_free_irq = 0;
1261 
1262         printk(KERN_INFO "sym%d: <%s> rev 0x%x at pci %s irq %u\n",
1263                 unit, dev->chip.name, pdev->revision, pci_name(pdev),
1264                 pdev->irq);
1265 
1266         /*
1267          *  Get the firmware for this chip.
1268          */
1269         fw = sym_find_firmware(&dev->chip);
1270         if (!fw)
1271                 goto attach_failed;
1272 
1273         shost = scsi_host_alloc(tpnt, sizeof(*sym_data));
1274         if (!shost)
1275                 goto attach_failed;
1276         sym_data = shost_priv(shost);
1277 
1278         /*
1279          *  Allocate immediately the host control block, 
1280          *  since we are only expecting to succeed. :)
1281          *  We keep track in the HCB of all the resources that 
1282          *  are to be released on error.
1283          */
1284         np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1285         if (!np)
1286                 goto attach_failed;
1287         np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1288         sym_data->ncb = np;
1289         sym_data->pdev = pdev;
1290         np->s.host = shost;
1291 
1292         pci_set_drvdata(pdev, shost);
1293 
1294         /*
1295          *  Copy some useful infos to the HCB.
1296          */
1297         np->hcb_ba      = vtobus(np);
1298         np->verbose     = sym_driver_setup.verbose;
1299         np->s.unit      = unit;
1300         np->features    = dev->chip.features;
1301         np->clock_divn  = dev->chip.nr_divisor;
1302         np->maxoffs     = dev->chip.offset_max;
1303         np->maxburst    = dev->chip.burst_max;
1304         np->myaddr      = dev->host_id;
1305         np->mmio_ba     = (u32)dev->mmio_base;
1306         np->ram_ba      = (u32)dev->ram_base;
1307         np->s.ioaddr    = dev->s.ioaddr;
1308         np->s.ramaddr   = dev->s.ramaddr;
1309 
1310         /*
1311          *  Edit its name.
1312          */
1313         strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1314         sprintf(np->s.inst_name, "sym%d", np->s.unit);
1315 
1316         if ((SYM_CONF_DMA_ADDRESSING_MODE > 0) && (np->features & FE_DAC) &&
1317                         !pci_set_dma_mask(pdev, DMA_DAC_MASK)) {
1318                 set_dac(np);
1319         } else if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
1320                 printf_warning("%s: No suitable DMA available\n", sym_name(np));
1321                 goto attach_failed;
1322         }
1323 
1324         if (sym_hcb_attach(shost, fw, dev->nvram))
1325                 goto attach_failed;
1326 
1327         /*
1328          *  Install the interrupt handler.
1329          *  If we synchonize the C code with SCRIPTS on interrupt, 
1330          *  we do not want to share the INTR line at all.
1331          */
1332         if (request_irq(pdev->irq, sym53c8xx_intr, IRQF_SHARED, NAME53C8XX,
1333                         shost)) {
1334                 printf_err("%s: request irq %u failure\n",
1335                         sym_name(np), pdev->irq);
1336                 goto attach_failed;
1337         }
1338         do_free_irq = 1;
1339 
1340         /*
1341          *  After SCSI devices have been opened, we cannot
1342          *  reset the bus safely, so we do it here.
1343          */
1344         spin_lock_irqsave(shost->host_lock, flags);
1345         if (sym_reset_scsi_bus(np, 0))
1346                 goto reset_failed;
1347 
1348         /*
1349          *  Start the SCRIPTS.
1350          */
1351         sym_start_up(shost, 1);
1352 
1353         /*
1354          *  Start the timer daemon
1355          */
1356         init_timer(&np->s.timer);
1357         np->s.timer.data     = (unsigned long) np;
1358         np->s.timer.function = sym53c8xx_timer;
1359         np->s.lasttime=0;
1360         sym_timer (np);
1361 
1362         /*
1363          *  Fill Linux host instance structure
1364          *  and return success.
1365          */
1366         shost->max_channel      = 0;
1367         shost->this_id          = np->myaddr;
1368         shost->max_id           = np->maxwide ? 16 : 8;
1369         shost->max_lun          = SYM_CONF_MAX_LUN;
1370         shost->unique_id        = pci_resource_start(pdev, 0);
1371         shost->cmd_per_lun      = SYM_CONF_MAX_TAG;
1372         shost->can_queue        = (SYM_CONF_MAX_START-2);
1373         shost->sg_tablesize     = SYM_CONF_MAX_SG;
1374         shost->max_cmd_len      = 16;
1375         BUG_ON(sym2_transport_template == NULL);
1376         shost->transportt       = sym2_transport_template;
1377 
1378         /* 53c896 rev 1 errata: DMA may not cross 16MB boundary */
1379         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 2)
1380                 shost->dma_boundary = 0xFFFFFF;
1381 
1382         spin_unlock_irqrestore(shost->host_lock, flags);
1383 
1384         return shost;
1385 
1386  reset_failed:
1387         printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1388                    "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1389         spin_unlock_irqrestore(shost->host_lock, flags);
1390  attach_failed:
1391         printf_info("sym%d: giving up ...\n", unit);
1392         if (np)
1393                 sym_free_resources(np, pdev, do_free_irq);
1394         else
1395                 sym_iounmap_device(dev);
1396         if (shost)
1397                 scsi_host_put(shost);
1398 
1399         return NULL;
1400  }
1401 
1402 
1403 /*
1404  *    Detect and try to read SYMBIOS and TEKRAM NVRAM.
1405  */
1406 #if SYM_CONF_NVRAM_SUPPORT
1407 static void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1408 {
1409         devp->nvram = nvp;
1410         nvp->type = 0;
1411 
1412         sym_read_nvram(devp, nvp);
1413 }
1414 #else
1415 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1416 {
1417 }
1418 #endif  /* SYM_CONF_NVRAM_SUPPORT */
1419 
1420 static int sym_check_supported(struct sym_device *device)
1421 {
1422         struct sym_chip *chip;
1423         struct pci_dev *pdev = device->pdev;
1424         unsigned long io_port = pci_resource_start(pdev, 0);
1425         int i;
1426 
1427         /*
1428          *  If user excluded this chip, do not initialize it.
1429          *  I hate this code so much.  Must kill it.
1430          */
1431         if (io_port) {
1432                 for (i = 0 ; i < 8 ; i++) {
1433                         if (sym_driver_setup.excludes[i] == io_port)
1434                                 return -ENODEV;
1435                 }
1436         }
1437 
1438         /*
1439          * Check if the chip is supported.  Then copy the chip description
1440          * to our device structure so we can make it match the actual device
1441          * and options.
1442          */
1443         chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1444         if (!chip) {
1445                 dev_info(&pdev->dev, "device not supported\n");
1446                 return -ENODEV;
1447         }
1448         memcpy(&device->chip, chip, sizeof(device->chip));
1449 
1450         return 0;
1451 }
1452 
1453 /*
1454  * Ignore Symbios chips controlled by various RAID controllers.
1455  * These controllers set value 0x52414944 at RAM end - 16.
1456  */
1457 static int sym_check_raid(struct sym_device *device)
1458 {
1459         unsigned int ram_size, ram_val;
1460 
1461         if (!device->s.ramaddr)
1462                 return 0;
1463 
1464         if (device->chip.features & FE_RAM8K)
1465                 ram_size = 8192;
1466         else
1467                 ram_size = 4096;
1468 
1469         ram_val = readl(device->s.ramaddr + ram_size - 16);
1470         if (ram_val != 0x52414944)
1471                 return 0;
1472 
1473         dev_info(&device->pdev->dev,
1474                         "not initializing, driven by RAID controller.\n");
1475         return -ENODEV;
1476 }
1477 
1478 static int sym_set_workarounds(struct sym_device *device)
1479 {
1480         struct sym_chip *chip = &device->chip;
1481         struct pci_dev *pdev = device->pdev;
1482         u_short status_reg;
1483 
1484         /*
1485          *  (ITEM 12 of a DEL about the 896 I haven't yet).
1486          *  We must ensure the chip will use WRITE AND INVALIDATE.
1487          *  The revision number limit is for now arbitrary.
1488          */
1489         if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 0x4) {
1490                 chip->features  |= (FE_WRIE | FE_CLSE);
1491         }
1492 
1493         /* If the chip can do Memory Write Invalidate, enable it */
1494         if (chip->features & FE_WRIE) {
1495                 if (pci_set_mwi(pdev))
1496                         return -ENODEV;
1497         }
1498 
1499         /*
1500          *  Work around for errant bit in 895A. The 66Mhz
1501          *  capable bit is set erroneously. Clear this bit.
1502          *  (Item 1 DEL 533)
1503          *
1504          *  Make sure Config space and Features agree.
1505          *
1506          *  Recall: writes are not normal to status register -
1507          *  write a 1 to clear and a 0 to leave unchanged.
1508          *  Can only reset bits.
1509          */
1510         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1511         if (chip->features & FE_66MHZ) {
1512                 if (!(status_reg & PCI_STATUS_66MHZ))
1513                         chip->features &= ~FE_66MHZ;
1514         } else {
1515                 if (status_reg & PCI_STATUS_66MHZ) {
1516                         status_reg = PCI_STATUS_66MHZ;
1517                         pci_write_config_word(pdev, PCI_STATUS, status_reg);
1518                         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1519                 }
1520         }
1521 
1522         return 0;
1523 }
1524 
1525 /*
1526  * Map HBA registers and on-chip SRAM (if present).
1527  */
1528 static int sym_iomap_device(struct sym_device *device)
1529 {
1530         struct pci_dev *pdev = device->pdev;
1531         struct pci_bus_region bus_addr;
1532         int i = 2;
1533 
1534         pcibios_resource_to_bus(pdev->bus, &bus_addr, &pdev->resource[1]);
1535         device->mmio_base = bus_addr.start;
1536 
1537         if (device->chip.features & FE_RAM) {
1538                 /*
1539                  * If the BAR is 64-bit, resource 2 will be occupied by the
1540                  * upper 32 bits
1541                  */
1542                 if (!pdev->resource[i].flags)
1543                         i++;
1544                 pcibios_resource_to_bus(pdev->bus, &bus_addr,
1545                                         &pdev->resource[i]);
1546                 device->ram_base = bus_addr.start;
1547         }
1548 
1549 #ifdef CONFIG_SCSI_SYM53C8XX_MMIO
1550         if (device->mmio_base)
1551                 device->s.ioaddr = pci_iomap(pdev, 1,
1552                                                 pci_resource_len(pdev, 1));
1553 #endif
1554         if (!device->s.ioaddr)
1555                 device->s.ioaddr = pci_iomap(pdev, 0,
1556                                                 pci_resource_len(pdev, 0));
1557         if (!device->s.ioaddr) {
1558                 dev_err(&pdev->dev, "could not map registers; giving up.\n");
1559                 return -EIO;
1560         }
1561         if (device->ram_base) {
1562                 device->s.ramaddr = pci_iomap(pdev, i,
1563                                                 pci_resource_len(pdev, i));
1564                 if (!device->s.ramaddr) {
1565                         dev_warn(&pdev->dev,
1566                                 "could not map SRAM; continuing anyway.\n");
1567                         device->ram_base = 0;
1568                 }
1569         }
1570 
1571         return 0;
1572 }
1573 
1574 /*
1575  * The NCR PQS and PDS cards are constructed as a DEC bridge
1576  * behind which sits a proprietary NCR memory controller and
1577  * either four or two 53c875s as separate devices.  We can tell
1578  * if an 875 is part of a PQS/PDS or not since if it is, it will
1579  * be on the same bus as the memory controller.  In its usual
1580  * mode of operation, the 875s are slaved to the memory
1581  * controller for all transfers.  To operate with the Linux
1582  * driver, the memory controller is disabled and the 875s
1583  * freed to function independently.  The only wrinkle is that
1584  * the preset SCSI ID (which may be zero) must be read in from
1585  * a special configuration space register of the 875.
1586  */
1587 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1588 {
1589         int slot;
1590         u8 tmp;
1591 
1592         for (slot = 0; slot < 256; slot++) {
1593                 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1594 
1595                 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1596                         pci_dev_put(memc);
1597                         continue;
1598                 }
1599 
1600                 /* bit 1: allow individual 875 configuration */
1601                 pci_read_config_byte(memc, 0x44, &tmp);
1602                 if ((tmp & 0x2) == 0) {
1603                         tmp |= 0x2;
1604                         pci_write_config_byte(memc, 0x44, tmp);
1605                 }
1606 
1607                 /* bit 2: drive individual 875 interrupts to the bus */
1608                 pci_read_config_byte(memc, 0x45, &tmp);
1609                 if ((tmp & 0x4) == 0) {
1610                         tmp |= 0x4;
1611                         pci_write_config_byte(memc, 0x45, tmp);
1612                 }
1613 
1614                 pci_dev_put(memc);
1615                 break;
1616         }
1617 
1618         pci_read_config_byte(pdev, 0x84, &tmp);
1619         sym_dev->host_id = tmp;
1620 }
1621 
1622 /*
1623  *  Called before unloading the module.
1624  *  Detach the host.
1625  *  We have to free resources and halt the NCR chip.
1626  */
1627 static int sym_detach(struct Scsi_Host *shost, struct pci_dev *pdev)
1628 {
1629         struct sym_hcb *np = sym_get_hcb(shost);
1630         printk("%s: detaching ...\n", sym_name(np));
1631 
1632         del_timer_sync(&np->s.timer);
1633 
1634         /*
1635          * Reset NCR chip.
1636          * We should use sym_soft_reset(), but we don't want to do 
1637          * so, since we may not be safe if interrupts occur.
1638          */
1639         printk("%s: resetting chip\n", sym_name(np));
1640         OUTB(np, nc_istat, SRST);
1641         INB(np, nc_mbox1);
1642         udelay(10);
1643         OUTB(np, nc_istat, 0);
1644 
1645         sym_free_resources(np, pdev, 1);
1646         scsi_host_put(shost);
1647 
1648         return 1;
1649 }
1650 
1651 /*
1652  * Driver host template.
1653  */
1654 static struct scsi_host_template sym2_template = {
1655         .module                 = THIS_MODULE,
1656         .name                   = "sym53c8xx",
1657         .info                   = sym53c8xx_info, 
1658         .queuecommand           = sym53c8xx_queue_command,
1659         .slave_alloc            = sym53c8xx_slave_alloc,
1660         .slave_configure        = sym53c8xx_slave_configure,
1661         .slave_destroy          = sym53c8xx_slave_destroy,
1662         .eh_abort_handler       = sym53c8xx_eh_abort_handler,
1663         .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1664         .eh_bus_reset_handler   = sym53c8xx_eh_bus_reset_handler,
1665         .eh_host_reset_handler  = sym53c8xx_eh_host_reset_handler,
1666         .this_id                = 7,
1667         .use_clustering         = ENABLE_CLUSTERING,
1668         .max_sectors            = 0xFFFF,
1669 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1670         .show_info              = sym_show_info,
1671 #ifdef  SYM_LINUX_USER_COMMAND_SUPPORT
1672         .write_info             = sym_user_command,
1673 #endif
1674         .proc_name              = NAME53C8XX,
1675 #endif
1676 };
1677 
1678 static int attach_count;
1679 
1680 static int sym2_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1681 {
1682         struct sym_device sym_dev;
1683         struct sym_nvram nvram;
1684         struct Scsi_Host *shost;
1685         int do_iounmap = 0;
1686         int do_disable_device = 1;
1687 
1688         memset(&sym_dev, 0, sizeof(sym_dev));
1689         memset(&nvram, 0, sizeof(nvram));
1690         sym_dev.pdev = pdev;
1691         sym_dev.host_id = SYM_SETUP_HOST_ID;
1692 
1693         if (pci_enable_device(pdev))
1694                 goto leave;
1695 
1696         pci_set_master(pdev);
1697 
1698         if (pci_request_regions(pdev, NAME53C8XX))
1699                 goto disable;
1700 
1701         if (sym_check_supported(&sym_dev))
1702                 goto free;
1703 
1704         if (sym_iomap_device(&sym_dev))
1705                 goto free;
1706         do_iounmap = 1;
1707 
1708         if (sym_check_raid(&sym_dev)) {
1709                 do_disable_device = 0;  /* Don't disable the device */
1710                 goto free;
1711         }
1712 
1713         if (sym_set_workarounds(&sym_dev))
1714                 goto free;
1715 
1716         sym_config_pqs(pdev, &sym_dev);
1717 
1718         sym_get_nvram(&sym_dev, &nvram);
1719 
1720         do_iounmap = 0; /* Don't sym_iounmap_device() after sym_attach(). */
1721         shost = sym_attach(&sym2_template, attach_count, &sym_dev);
1722         if (!shost)
1723                 goto free;
1724 
1725         if (scsi_add_host(shost, &pdev->dev))
1726                 goto detach;
1727         scsi_scan_host(shost);
1728 
1729         attach_count++;
1730 
1731         return 0;
1732 
1733  detach:
1734         sym_detach(pci_get_drvdata(pdev), pdev);
1735  free:
1736         if (do_iounmap)
1737                 sym_iounmap_device(&sym_dev);
1738         pci_release_regions(pdev);
1739  disable:
1740         if (do_disable_device)
1741                 pci_disable_device(pdev);
1742  leave:
1743         return -ENODEV;
1744 }
1745 
1746 static void sym2_remove(struct pci_dev *pdev)
1747 {
1748         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1749 
1750         scsi_remove_host(shost);
1751         sym_detach(shost, pdev);
1752         pci_release_regions(pdev);
1753         pci_disable_device(pdev);
1754 
1755         attach_count--;
1756 }
1757 
1758 /**
1759  * sym2_io_error_detected() - called when PCI error is detected
1760  * @pdev: pointer to PCI device
1761  * @state: current state of the PCI slot
1762  */
1763 static pci_ers_result_t sym2_io_error_detected(struct pci_dev *pdev,
1764                                          enum pci_channel_state state)
1765 {
1766         /* If slot is permanently frozen, turn everything off */
1767         if (state == pci_channel_io_perm_failure) {
1768                 sym2_remove(pdev);
1769                 return PCI_ERS_RESULT_DISCONNECT;
1770         }
1771 
1772         disable_irq(pdev->irq);
1773         pci_disable_device(pdev);
1774 
1775         /* Request that MMIO be enabled, so register dump can be taken. */
1776         return PCI_ERS_RESULT_CAN_RECOVER;
1777 }
1778 
1779 /**
1780  * sym2_io_slot_dump - Enable MMIO and dump debug registers
1781  * @pdev: pointer to PCI device
1782  */
1783 static pci_ers_result_t sym2_io_slot_dump(struct pci_dev *pdev)
1784 {
1785         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1786 
1787         sym_dump_registers(shost);
1788 
1789         /* Request a slot reset. */
1790         return PCI_ERS_RESULT_NEED_RESET;
1791 }
1792 
1793 /**
1794  * sym2_reset_workarounds - hardware-specific work-arounds
1795  *
1796  * This routine is similar to sym_set_workarounds(), except
1797  * that, at this point, we already know that the device was
1798  * successfully initialized at least once before, and so most
1799  * of the steps taken there are un-needed here.
1800  */
1801 static void sym2_reset_workarounds(struct pci_dev *pdev)
1802 {
1803         u_short status_reg;
1804         struct sym_chip *chip;
1805 
1806         chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1807 
1808         /* Work around for errant bit in 895A, in a fashion
1809          * similar to what is done in sym_set_workarounds().
1810          */
1811         pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1812         if (!(chip->features & FE_66MHZ) && (status_reg & PCI_STATUS_66MHZ)) {
1813                 status_reg = PCI_STATUS_66MHZ;
1814                 pci_write_config_word(pdev, PCI_STATUS, status_reg);
1815                 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1816         }
1817 }
1818 
1819 /**
1820  * sym2_io_slot_reset() - called when the pci bus has been reset.
1821  * @pdev: pointer to PCI device
1822  *
1823  * Restart the card from scratch.
1824  */
1825 static pci_ers_result_t sym2_io_slot_reset(struct pci_dev *pdev)
1826 {
1827         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1828         struct sym_hcb *np = sym_get_hcb(shost);
1829 
1830         printk(KERN_INFO "%s: recovering from a PCI slot reset\n",
1831                   sym_name(np));
1832 
1833         if (pci_enable_device(pdev)) {
1834                 printk(KERN_ERR "%s: Unable to enable after PCI reset\n",
1835                         sym_name(np));
1836                 return PCI_ERS_RESULT_DISCONNECT;
1837         }
1838 
1839         pci_set_master(pdev);
1840         enable_irq(pdev->irq);
1841 
1842         /* If the chip can do Memory Write Invalidate, enable it */
1843         if (np->features & FE_WRIE) {
1844                 if (pci_set_mwi(pdev))
1845                         return PCI_ERS_RESULT_DISCONNECT;
1846         }
1847 
1848         /* Perform work-arounds, analogous to sym_set_workarounds() */
1849         sym2_reset_workarounds(pdev);
1850 
1851         /* Perform host reset only on one instance of the card */
1852         if (PCI_FUNC(pdev->devfn) == 0) {
1853                 if (sym_reset_scsi_bus(np, 0)) {
1854                         printk(KERN_ERR "%s: Unable to reset scsi host\n",
1855                                 sym_name(np));
1856                         return PCI_ERS_RESULT_DISCONNECT;
1857                 }
1858                 sym_start_up(shost, 1);
1859         }
1860 
1861         return PCI_ERS_RESULT_RECOVERED;
1862 }
1863 
1864 /**
1865  * sym2_io_resume() - resume normal ops after PCI reset
1866  * @pdev: pointer to PCI device
1867  *
1868  * Called when the error recovery driver tells us that its
1869  * OK to resume normal operation. Use completion to allow
1870  * halted scsi ops to resume.
1871  */
1872 static void sym2_io_resume(struct pci_dev *pdev)
1873 {
1874         struct Scsi_Host *shost = pci_get_drvdata(pdev);
1875         struct sym_data *sym_data = shost_priv(shost);
1876 
1877         spin_lock_irq(shost->host_lock);
1878         if (sym_data->io_reset)
1879                 complete_all(sym_data->io_reset);
1880         spin_unlock_irq(shost->host_lock);
1881 }
1882 
1883 static void sym2_get_signalling(struct Scsi_Host *shost)
1884 {
1885         struct sym_hcb *np = sym_get_hcb(shost);
1886         enum spi_signal_type type;
1887 
1888         switch (np->scsi_mode) {
1889         case SMODE_SE:
1890                 type = SPI_SIGNAL_SE;
1891                 break;
1892         case SMODE_LVD:
1893                 type = SPI_SIGNAL_LVD;
1894                 break;
1895         case SMODE_HVD:
1896                 type = SPI_SIGNAL_HVD;
1897                 break;
1898         default:
1899                 type = SPI_SIGNAL_UNKNOWN;
1900                 break;
1901         }
1902         spi_signalling(shost) = type;
1903 }
1904 
1905 static void sym2_set_offset(struct scsi_target *starget, int offset)
1906 {
1907         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1908         struct sym_hcb *np = sym_get_hcb(shost);
1909         struct sym_tcb *tp = &np->target[starget->id];
1910 
1911         tp->tgoal.offset = offset;
1912         tp->tgoal.check_nego = 1;
1913 }
1914 
1915 static void sym2_set_period(struct scsi_target *starget, int period)
1916 {
1917         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1918         struct sym_hcb *np = sym_get_hcb(shost);
1919         struct sym_tcb *tp = &np->target[starget->id];
1920 
1921         /* have to have DT for these transfers, but DT will also
1922          * set width, so check that this is allowed */
1923         if (period <= np->minsync && spi_width(starget))
1924                 tp->tgoal.dt = 1;
1925 
1926         tp->tgoal.period = period;
1927         tp->tgoal.check_nego = 1;
1928 }
1929 
1930 static void sym2_set_width(struct scsi_target *starget, int width)
1931 {
1932         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1933         struct sym_hcb *np = sym_get_hcb(shost);
1934         struct sym_tcb *tp = &np->target[starget->id];
1935 
1936         /* It is illegal to have DT set on narrow transfers.  If DT is
1937          * clear, we must also clear IU and QAS.  */
1938         if (width == 0)
1939                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1940 
1941         tp->tgoal.width = width;
1942         tp->tgoal.check_nego = 1;
1943 }
1944 
1945 static void sym2_set_dt(struct scsi_target *starget, int dt)
1946 {
1947         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1948         struct sym_hcb *np = sym_get_hcb(shost);
1949         struct sym_tcb *tp = &np->target[starget->id];
1950 
1951         /* We must clear QAS and IU if DT is clear */
1952         if (dt)
1953                 tp->tgoal.dt = 1;
1954         else
1955                 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1956         tp->tgoal.check_nego = 1;
1957 }
1958 
1959 #if 0
1960 static void sym2_set_iu(struct scsi_target *starget, int iu)
1961 {
1962         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1963         struct sym_hcb *np = sym_get_hcb(shost);
1964         struct sym_tcb *tp = &np->target[starget->id];
1965 
1966         if (iu)
1967                 tp->tgoal.iu = tp->tgoal.dt = 1;
1968         else
1969                 tp->tgoal.iu = 0;
1970         tp->tgoal.check_nego = 1;
1971 }
1972 
1973 static void sym2_set_qas(struct scsi_target *starget, int qas)
1974 {
1975         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1976         struct sym_hcb *np = sym_get_hcb(shost);
1977         struct sym_tcb *tp = &np->target[starget->id];
1978 
1979         if (qas)
1980                 tp->tgoal.dt = tp->tgoal.qas = 1;
1981         else
1982                 tp->tgoal.qas = 0;
1983         tp->tgoal.check_nego = 1;
1984 }
1985 #endif
1986 
1987 static struct spi_function_template sym2_transport_functions = {
1988         .set_offset     = sym2_set_offset,
1989         .show_offset    = 1,
1990         .set_period     = sym2_set_period,
1991         .show_period    = 1,
1992         .set_width      = sym2_set_width,
1993         .show_width     = 1,
1994         .set_dt         = sym2_set_dt,
1995         .show_dt        = 1,
1996 #if 0
1997         .set_iu         = sym2_set_iu,
1998         .show_iu        = 1,
1999         .set_qas        = sym2_set_qas,
2000         .show_qas       = 1,
2001 #endif
2002         .get_signalling = sym2_get_signalling,
2003 };
2004 
2005 static struct pci_device_id sym2_id_table[] = {
2006         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2007           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2008         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2009           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2010         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2011           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2012         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2013           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2014         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2015           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2016         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2017           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2018         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2019           PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL },
2020         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2021           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2022         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2023           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2024         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2025           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2026         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2027           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2028         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2029           PCI_ANY_ID, PCI_ANY_ID,  PCI_CLASS_STORAGE_SCSI<<8,  0xffff00, 0UL }, /* new */
2030         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2031           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2032         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2033           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2034         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2035           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2036         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2037           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2038         { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2039           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2040         { 0, }
2041 };
2042 
2043 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2044 
2045 static const struct pci_error_handlers sym2_err_handler = {
2046         .error_detected = sym2_io_error_detected,
2047         .mmio_enabled   = sym2_io_slot_dump,
2048         .slot_reset     = sym2_io_slot_reset,
2049         .resume         = sym2_io_resume,
2050 };
2051 
2052 static struct pci_driver sym2_driver = {
2053         .name           = NAME53C8XX,
2054         .id_table       = sym2_id_table,
2055         .probe          = sym2_probe,
2056         .remove         = sym2_remove,
2057         .err_handler    = &sym2_err_handler,
2058 };
2059 
2060 static int __init sym2_init(void)
2061 {
2062         int error;
2063 
2064         sym2_setup_params();
2065         sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2066         if (!sym2_transport_template)
2067                 return -ENODEV;
2068 
2069         error = pci_register_driver(&sym2_driver);
2070         if (error)
2071                 spi_release_transport(sym2_transport_template);
2072         return error;
2073 }
2074 
2075 static void __exit sym2_exit(void)
2076 {
2077         pci_unregister_driver(&sym2_driver);
2078         spi_release_transport(sym2_transport_template);
2079 }
2080 
2081 module_init(sym2_init);
2082 module_exit(sym2_exit);
2083 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us