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Linux 2.6.34-rc3
[pohmelfs.git] / drivers / scsi / sym53c8xx_2 / sym_glue.c
blob8b955b534a36f7ce836967b49978b2deb7bd8d64
1 /*
2 * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
3 * of PCI-SCSI IO processors.
4 *
5 * Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
6 * Copyright (c) 2003-2005 Matthew Wilcox <matthew@wil.cx>
7 *
8 * This driver is derived from the Linux sym53c8xx driver.
9 * Copyright (C) 1998-2000 Gerard Roudier
10 *
11 * The sym53c8xx driver is derived from the ncr53c8xx driver that had been
12 * a port of the FreeBSD ncr driver to Linux-1.2.13.
13 *
14 * The original ncr driver has been written for 386bsd and FreeBSD by
15 * Wolfgang Stanglmeier <wolf@cologne.de>
16 * Stefan Esser <se@mi.Uni-Koeln.de>
17 * Copyright (C) 1994 Wolfgang Stanglmeier
18 *
19 * Other major contributions:
20 *
21 * NVRAM detection and reading.
22 * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
23 *
24 *-----------------------------------------------------------------------------
25 *
26 * This program is free software; you can redistribute it and/or modify
27 * it under the terms of the GNU General Public License as published by
28 * the Free Software Foundation; either version 2 of the License, or
29 * (at your option) any later version.
30 *
31 * This program is distributed in the hope that it will be useful,
32 * but WITHOUT ANY WARRANTY; without even the implied warranty of
33 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
34 * GNU General Public License for more details.
35 *
36 * You should have received a copy of the GNU General Public License
37 * along with this program; if not, write to the Free Software
38 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
39 */
40 #include <linux/ctype.h>
41 #include <linux/init.h>
42 #include <linux/module.h>
43 #include <linux/moduleparam.h>
44 #include <linux/spinlock.h>
45 #include <scsi/scsi.h>
46 #include <scsi/scsi_tcq.h>
47 #include <scsi/scsi_device.h>
48 #include <scsi/scsi_transport.h>
49
50 #include "sym_glue.h"
51 #include "sym_nvram.h"
52
53 #define NAME53C "sym53c"
54 #define NAME53C8XX "sym53c8xx"
55
56 struct sym_driver_setup sym_driver_setup = SYM_LINUX_DRIVER_SETUP;
57 unsigned int sym_debug_flags = 0;
58
59 static char *excl_string;
60 static char *safe_string;
61 module_param_named(cmd_per_lun, sym_driver_setup.max_tag, ushort, 0);
62 module_param_named(burst, sym_driver_setup.burst_order, byte, 0);
63 module_param_named(led, sym_driver_setup.scsi_led, byte, 0);
64 module_param_named(diff, sym_driver_setup.scsi_diff, byte, 0);
65 module_param_named(irqm, sym_driver_setup.irq_mode, byte, 0);
66 module_param_named(buschk, sym_driver_setup.scsi_bus_check, byte, 0);
67 module_param_named(hostid, sym_driver_setup.host_id, byte, 0);
68 module_param_named(verb, sym_driver_setup.verbose, byte, 0);
69 module_param_named(debug, sym_debug_flags, uint, 0);
70 module_param_named(settle, sym_driver_setup.settle_delay, byte, 0);
71 module_param_named(nvram, sym_driver_setup.use_nvram, byte, 0);
72 module_param_named(excl, excl_string, charp, 0);
73 module_param_named(safe, safe_string, charp, 0);
74
75 MODULE_PARM_DESC(cmd_per_lun, "The maximum number of tags to use by default");
76 MODULE_PARM_DESC(burst, "Maximum burst. 0 to disable, 255 to read from registers");
77 MODULE_PARM_DESC(led, "Set to 1 to enable LED support");
78 MODULE_PARM_DESC(diff, "0 for no differential mode, 1 for BIOS, 2 for always, 3 for not GPIO3");
79 MODULE_PARM_DESC(irqm, "0 for open drain, 1 to leave alone, 2 for totem pole");
80 MODULE_PARM_DESC(buschk, "0 to not check, 1 for detach on error, 2 for warn on error");
81 MODULE_PARM_DESC(hostid, "The SCSI ID to use for the host adapters");
82 MODULE_PARM_DESC(verb, "0 for minimal verbosity, 1 for normal, 2 for excessive");
83 MODULE_PARM_DESC(debug, "Set bits to enable debugging");
84 MODULE_PARM_DESC(settle, "Settle delay in seconds. Default 3");
85 MODULE_PARM_DESC(nvram, "Option currently not used");
86 MODULE_PARM_DESC(excl, "List ioport addresses here to prevent controllers from being attached");
87 MODULE_PARM_DESC(safe, "Set other settings to a \"safe mode\"");
88
89 MODULE_LICENSE("GPL");
90 MODULE_VERSION(SYM_VERSION);
91 MODULE_AUTHOR("Matthew Wilcox <matthew@wil.cx>");
92 MODULE_DESCRIPTION("NCR, Symbios and LSI 8xx and 1010 PCI SCSI adapters");
93
94 static void sym2_setup_params(void)
95 {
96 char *p = excl_string;
97 int xi = 0;
98
99 while (p && (xi < 8)) {
100 char *next_p;
101 int val = (int) simple_strtoul(p, &next_p, 0);
102 sym_driver_setup.excludes[xi++] = val;
103 p = next_p;
104 }
105
106 if (safe_string) {
107 if (*safe_string == 'y') {
108 sym_driver_setup.max_tag = 0;
109 sym_driver_setup.burst_order = 0;
110 sym_driver_setup.scsi_led = 0;
111 sym_driver_setup.scsi_diff = 1;
112 sym_driver_setup.irq_mode = 0;
113 sym_driver_setup.scsi_bus_check = 2;
114 sym_driver_setup.host_id = 7;
115 sym_driver_setup.verbose = 2;
116 sym_driver_setup.settle_delay = 10;
117 sym_driver_setup.use_nvram = 1;
118 } else if (*safe_string != 'n') {
119 printk(KERN_WARNING NAME53C8XX "Ignoring parameter %s"
120 " passed to safe option", safe_string);
121 }
122 }
123 }
124
125 static struct scsi_transport_template *sym2_transport_template = NULL;
126
127 /*
128 * Driver private area in the SCSI command structure.
129 */
130 struct sym_ucmd { /* Override the SCSI pointer structure */
131 struct completion *eh_done; /* SCSI error handling */
132 };
133
134 #define SYM_UCMD_PTR(cmd) ((struct sym_ucmd *)(&(cmd)->SCp))
135 #define SYM_SOFTC_PTR(cmd) sym_get_hcb(cmd->device->host)
136
137 /*
138 * Complete a pending CAM CCB.
139 */
140 void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *cmd)
141 {
142 struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
143 BUILD_BUG_ON(sizeof(struct scsi_pointer) < sizeof(struct sym_ucmd));
144
145 if (ucmd->eh_done)
146 complete(ucmd->eh_done);
147
148 scsi_dma_unmap(cmd);
149 cmd->scsi_done(cmd);
150 }
151
152 /*
153 * Tell the SCSI layer about a BUS RESET.
154 */
155 void sym_xpt_async_bus_reset(struct sym_hcb *np)
156 {
157 printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
158 np->s.settle_time = jiffies + sym_driver_setup.settle_delay * HZ;
159 np->s.settle_time_valid = 1;
160 if (sym_verbose >= 2)
161 printf_info("%s: command processing suspended for %d seconds\n",
162 sym_name(np), sym_driver_setup.settle_delay);
163 }
164
165 /*
166 * Choose the more appropriate CAM status if
167 * the IO encountered an extended error.
168 */
169 static int sym_xerr_cam_status(int cam_status, int x_status)
170 {
171 if (x_status) {
172 if (x_status & XE_PARITY_ERR)
173 cam_status = DID_PARITY;
174 else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN))
175 cam_status = DID_ERROR;
176 else if (x_status & XE_BAD_PHASE)
177 cam_status = DID_ERROR;
178 else
179 cam_status = DID_ERROR;
180 }
181 return cam_status;
182 }
183
184 /*
185 * Build CAM result for a failed or auto-sensed IO.
186 */
187 void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid)
188 {
189 struct scsi_cmnd *cmd = cp->cmd;
190 u_int cam_status, scsi_status, drv_status;
191
192 drv_status = 0;
193 cam_status = DID_OK;
194 scsi_status = cp->ssss_status;
195
196 if (cp->host_flags & HF_SENSE) {
197 scsi_status = cp->sv_scsi_status;
198 resid = cp->sv_resid;
199 if (sym_verbose && cp->sv_xerr_status)
200 sym_print_xerr(cmd, cp->sv_xerr_status);
201 if (cp->host_status == HS_COMPLETE &&
202 cp->ssss_status == S_GOOD &&
203 cp->xerr_status == 0) {
204 cam_status = sym_xerr_cam_status(DID_OK,
205 cp->sv_xerr_status);
206 drv_status = DRIVER_SENSE;
207 /*
208 * Bounce back the sense data to user.
209 */
210 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
211 memcpy(cmd->sense_buffer, cp->sns_bbuf,
212 min(SCSI_SENSE_BUFFERSIZE, SYM_SNS_BBUF_LEN));
213 #if 0
214 /*
215 * If the device reports a UNIT ATTENTION condition
216 * due to a RESET condition, we should consider all
217 * disconnect CCBs for this unit as aborted.
218 */
219 if (1) {
220 u_char *p;
221 p = (u_char *) cmd->sense_data;
222 if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
223 sym_clear_tasks(np, DID_ABORT,
224 cp->target,cp->lun, -1);
225 }
226 #endif
227 } else {
228 /*
229 * Error return from our internal request sense. This
230 * is bad: we must clear the contingent allegiance
231 * condition otherwise the device will always return
232 * BUSY. Use a big stick.
233 */
234 sym_reset_scsi_target(np, cmd->device->id);
235 cam_status = DID_ERROR;
236 }
237 } else if (cp->host_status == HS_COMPLETE) /* Bad SCSI status */
238 cam_status = DID_OK;
239 else if (cp->host_status == HS_SEL_TIMEOUT) /* Selection timeout */
240 cam_status = DID_NO_CONNECT;
241 else if (cp->host_status == HS_UNEXPECTED) /* Unexpected BUS FREE*/
242 cam_status = DID_ERROR;
243 else { /* Extended error */
244 if (sym_verbose) {
245 sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
246 cp->host_status, cp->ssss_status,
247 cp->xerr_status);
248 }
249 /*
250 * Set the most appropriate value for CAM status.
251 */
252 cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
253 }
254 scsi_set_resid(cmd, resid);
255 cmd->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
256 }
257
258 static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
259 {
260 int segment;
261 int use_sg;
262
263 cp->data_len = 0;
264
265 use_sg = scsi_dma_map(cmd);
266 if (use_sg > 0) {
267 struct scatterlist *sg;
268 struct sym_tcb *tp = &np->target[cp->target];
269 struct sym_tblmove *data;
270
271 if (use_sg > SYM_CONF_MAX_SG) {
272 scsi_dma_unmap(cmd);
273 return -1;
274 }
275
276 data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
277
278 scsi_for_each_sg(cmd, sg, use_sg, segment) {
279 dma_addr_t baddr = sg_dma_address(sg);
280 unsigned int len = sg_dma_len(sg);
281
282 if ((len & 1) && (tp->head.wval & EWS)) {
283 len++;
284 cp->odd_byte_adjustment++;
285 }
286
287 sym_build_sge(np, &data[segment], baddr, len);
288 cp->data_len += len;
289 }
290 } else {
291 segment = -2;
292 }
293
294 return segment;
295 }
296
297 /*
298 * Queue a SCSI command.
299 */
300 static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd)
301 {
302 struct scsi_device *sdev = cmd->device;
303 struct sym_tcb *tp;
304 struct sym_lcb *lp;
305 struct sym_ccb *cp;
306 int order;
307
308 /*
309 * Retrieve the target descriptor.
310 */
311 tp = &np->target[sdev->id];
312
313 /*
314 * Select tagged/untagged.
315 */
316 lp = sym_lp(tp, sdev->lun);
317 order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
318
319 /*
320 * Queue the SCSI IO.
321 */
322 cp = sym_get_ccb(np, cmd, order);
323 if (!cp)
324 return 1; /* Means resource shortage */
325 sym_queue_scsiio(np, cmd, cp);
326 return 0;
327 }
328
329 /*
330 * Setup buffers and pointers that address the CDB.
331 */
332 static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
333 {
334 memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len);
335
336 cp->phys.cmd.addr = CCB_BA(cp, cdb_buf[0]);
337 cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
338
339 return 0;
340 }
341
342 /*
343 * Setup pointers that address the data and start the I/O.
344 */
345 int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
346 {
347 u32 lastp, goalp;
348 int dir;
349
350 /*
351 * Build the CDB.
352 */
353 if (sym_setup_cdb(np, cmd, cp))
354 goto out_abort;
355
356 /*
357 * No direction means no data.
358 */
359 dir = cmd->sc_data_direction;
360 if (dir != DMA_NONE) {
361 cp->segments = sym_scatter(np, cp, cmd);
362 if (cp->segments < 0) {
363 sym_set_cam_status(cmd, DID_ERROR);
364 goto out_abort;
365 }
366
367 /*
368 * No segments means no data.
369 */
370 if (!cp->segments)
371 dir = DMA_NONE;
372 } else {
373 cp->data_len = 0;
374 cp->segments = 0;
375 }
376
377 /*
378 * Set the data pointer.
379 */
380 switch (dir) {
381 case DMA_BIDIRECTIONAL:
382 scmd_printk(KERN_INFO, cmd, "got DMA_BIDIRECTIONAL command");
383 sym_set_cam_status(cmd, DID_ERROR);
384 goto out_abort;
385 case DMA_TO_DEVICE:
386 goalp = SCRIPTA_BA(np, data_out2) + 8;
387 lastp = goalp - 8 - (cp->segments * (2*4));
388 break;
389 case DMA_FROM_DEVICE:
390 cp->host_flags |= HF_DATA_IN;
391 goalp = SCRIPTA_BA(np, data_in2) + 8;
392 lastp = goalp - 8 - (cp->segments * (2*4));
393 break;
394 case DMA_NONE:
395 default:
396 lastp = goalp = SCRIPTB_BA(np, no_data);
397 break;
398 }
399
400 /*
401 * Set all pointers values needed by SCRIPTS.
402 */
403 cp->phys.head.lastp = cpu_to_scr(lastp);
404 cp->phys.head.savep = cpu_to_scr(lastp);
405 cp->startp = cp->phys.head.savep;
406 cp->goalp = cpu_to_scr(goalp);
407
408 /*
409 * When `#ifed 1', the code below makes the driver
410 * panic on the first attempt to write to a SCSI device.
411 * It is the first test we want to do after a driver
412 * change that does not seem obviously safe. :)
413 */
414 #if 0
415 switch (cp->cdb_buf[0]) {
416 case 0x0A: case 0x2A: case 0xAA:
417 panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
418 break;
419 default:
420 break;
421 }
422 #endif
423
424 /*
425 * activate this job.
426 */
427 sym_put_start_queue(np, cp);
428 return 0;
429
430 out_abort:
431 sym_free_ccb(np, cp);
432 sym_xpt_done(np, cmd);
433 return 0;
434 }
435
436
437 /*
438 * timer daemon.
439 *
440 * Misused to keep the driver running when
441 * interrupts are not configured correctly.
442 */
443 static void sym_timer(struct sym_hcb *np)
444 {
445 unsigned long thistime = jiffies;
446
447 /*
448 * Restart the timer.
449 */
450 np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
451 add_timer(&np->s.timer);
452
453 /*
454 * If we are resetting the ncr, wait for settle_time before
455 * clearing it. Then command processing will be resumed.
456 */
457 if (np->s.settle_time_valid) {
458 if (time_before_eq(np->s.settle_time, thistime)) {
459 if (sym_verbose >= 2 )
460 printk("%s: command processing resumed\n",
461 sym_name(np));
462 np->s.settle_time_valid = 0;
463 }
464 return;
465 }
466
467 /*
468 * Nothing to do for now, but that may come.
469 */
470 if (np->s.lasttime + 4*HZ < thistime) {
471 np->s.lasttime = thistime;
472 }
473
474 #ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
475 /*
476 * Some way-broken PCI bridges may lead to
477 * completions being lost when the clearing
478 * of the INTFLY flag by the CPU occurs
479 * concurrently with the chip raising this flag.
480 * If this ever happen, lost completions will
481 * be reaped here.
482 */
483 sym_wakeup_done(np);
484 #endif
485 }
486
487
488 /*
489 * PCI BUS error handler.
490 */
491 void sym_log_bus_error(struct Scsi_Host *shost)
492 {
493 struct sym_data *sym_data = shost_priv(shost);
494 struct pci_dev *pdev = sym_data->pdev;
495 unsigned short pci_sts;
496 pci_read_config_word(pdev, PCI_STATUS, &pci_sts);
497 if (pci_sts & 0xf900) {
498 pci_write_config_word(pdev, PCI_STATUS, pci_sts);
499 shost_printk(KERN_WARNING, shost,
500 "PCI bus error: status = 0x%04x\n", pci_sts & 0xf900);
501 }
502 }
503
504 /*
505 * queuecommand method. Entered with the host adapter lock held and
506 * interrupts disabled.
507 */
508 static int sym53c8xx_queue_command(struct scsi_cmnd *cmd,
509 void (*done)(struct scsi_cmnd *))
510 {
511 struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
512 struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
513 int sts = 0;
514
515 cmd->scsi_done = done;
516 memset(ucp, 0, sizeof(*ucp));
517
518 /*
519 * Shorten our settle_time if needed for
520 * this command not to time out.
521 */
522 if (np->s.settle_time_valid && cmd->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 /*
540 * Linux entry point of the interrupt handler.
541 */
542 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id)
543 {
544 struct Scsi_Host *shost = dev_id;
545 struct sym_data *sym_data = shost_priv(shost);
546 irqreturn_t result;
547
548 /* Avoid spinloop trying to handle interrupts on frozen device */
549 if (pci_channel_offline(sym_data->pdev))
550 return IRQ_NONE;
551
552 if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
553
554 spin_lock(shost->host_lock);
555 result = sym_interrupt(shost);
556 spin_unlock(shost->host_lock);
557
558 if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
559
560 return result;
561 }
562
563 /*
564 * Linux entry point of the timer handler
565 */
566 static void sym53c8xx_timer(unsigned long npref)
567 {
568 struct sym_hcb *np = (struct sym_hcb *)npref;
569 unsigned long flags;
570
571 spin_lock_irqsave(np->s.host->host_lock, flags);
572 sym_timer(np);
573 spin_unlock_irqrestore(np->s.host->host_lock, flags);
574 }
575
576
577 /*
578 * What the eh thread wants us to perform.
579 */
580 #define SYM_EH_ABORT 0
581 #define SYM_EH_DEVICE_RESET 1
582 #define SYM_EH_BUS_RESET 2
583 #define SYM_EH_HOST_RESET 3
584
585 /*
586 * Generic method for our eh processing.
587 * The 'op' argument tells what we have to do.
588 */
589 static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
590 {
591 struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
592 struct Scsi_Host *shost = cmd->device->host;
593 struct sym_data *sym_data = shost_priv(shost);
594 struct pci_dev *pdev = sym_data->pdev;
595 struct sym_hcb *np = sym_data->ncb;
596 SYM_QUEHEAD *qp;
597 int cmd_queued = 0;
598 int sts = -1;
599 struct completion eh_done;
600
601 scmd_printk(KERN_WARNING, cmd, "%s operation started\n", opname);
602
603 /* We may be in an error condition because the PCI bus
604 * went down. In this case, we need to wait until the
605 * PCI bus is reset, the card is reset, and only then
606 * proceed with the scsi error recovery. There's no
607 * point in hurrying; take a leisurely wait.
608 */
609 #define WAIT_FOR_PCI_RECOVERY 35
610 if (pci_channel_offline(pdev)) {
611 int finished_reset = 0;
612 init_completion(&eh_done);
613 spin_lock_irq(shost->host_lock);
614 /* Make sure we didn't race */
615 if (pci_channel_offline(pdev)) {
616 BUG_ON(sym_data->io_reset);
617 sym_data->io_reset = &eh_done;
618 } else {
619 finished_reset = 1;
620 }
621 spin_unlock_irq(shost->host_lock);
622 if (!finished_reset)
623 finished_reset = wait_for_completion_timeout
624 (sym_data->io_reset,
625 WAIT_FOR_PCI_RECOVERY*HZ);
626 spin_lock_irq(shost->host_lock);
627 sym_data->io_reset = NULL;
628 spin_unlock_irq(shost->host_lock);
629 if (!finished_reset)
630 return SCSI_FAILED;
631 }
632
633 spin_lock_irq(shost->host_lock);
634 /* This one is queued in some place -> to wait for completion */
635 FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
636 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
637 if (cp->cmd == cmd) {
638 cmd_queued = 1;
639 break;
640 }
641 }
642
643 /* Try to proceed the operation we have been asked for */
644 sts = -1;
645 switch(op) {
646 case SYM_EH_ABORT:
647 sts = sym_abort_scsiio(np, cmd, 1);
648 break;
649 case SYM_EH_DEVICE_RESET:
650 sts = sym_reset_scsi_target(np, cmd->device->id);
651 break;
652 case SYM_EH_BUS_RESET:
653 sym_reset_scsi_bus(np, 1);
654 sts = 0;
655 break;
656 case SYM_EH_HOST_RESET:
657 sym_reset_scsi_bus(np, 0);
658 sym_start_up(shost, 1);
659 sts = 0;
660 break;
661 default:
662 break;
663 }
664
665 /* On error, restore everything and cross fingers :) */
666 if (sts)
667 cmd_queued = 0;
668
669 if (cmd_queued) {
670 init_completion(&eh_done);
671 ucmd->eh_done = &eh_done;
672 spin_unlock_irq(shost->host_lock);
673 if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
674 ucmd->eh_done = NULL;
675 sts = -2;
676 }
677 } else {
678 spin_unlock_irq(shost->host_lock);
679 }
680
681 dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
682 sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
683 return sts ? SCSI_FAILED : SCSI_SUCCESS;
684 }
685
686
687 /*
688 * Error handlers called from the eh thread (one thread per HBA).
689 */
690 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
691 {
692 return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
693 }
694
695 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
696 {
697 return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
698 }
699
700 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
701 {
702 return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
703 }
704
705 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
706 {
707 return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
708 }
709
710 /*
711 * Tune device queuing depth, according to various limits.
712 */
713 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
714 {
715 struct sym_lcb *lp = sym_lp(tp, lun);
716 u_short oldtags;
717
718 if (!lp)
719 return;
720
721 oldtags = lp->s.reqtags;
722
723 if (reqtags > lp->s.scdev_depth)
724 reqtags = lp->s.scdev_depth;
725
726 lp->s.reqtags = reqtags;
727
728 if (reqtags != oldtags) {
729 dev_info(&tp->starget->dev,
730 "tagged command queuing %s, command queue depth %d.\n",
731 lp->s.reqtags ? "enabled" : "disabled", reqtags);
732 }
733 }
734
735 static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
736 {
737 struct sym_hcb *np = sym_get_hcb(sdev->host);
738 struct sym_tcb *tp = &np->target[sdev->id];
739 struct sym_lcb *lp;
740 unsigned long flags;
741 int error;
742
743 if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
744 return -ENXIO;
745
746 spin_lock_irqsave(np->s.host->host_lock, flags);
747
748 /*
749 * Fail the device init if the device is flagged NOSCAN at BOOT in
750 * the NVRAM. This may speed up boot and maintain coherency with
751 * BIOS device numbering. Clearing the flag allows the user to
752 * rescan skipped devices later. We also return an error for
753 * devices not flagged for SCAN LUNS in the NVRAM since some single
754 * lun devices behave badly when asked for a non zero LUN.
755 */
756
757 if (tp->usrflags & SYM_SCAN_BOOT_DISABLED) {
758 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
759 starget_printk(KERN_INFO, sdev->sdev_target,
760 "Scan at boot disabled in NVRAM\n");
761 error = -ENXIO;
762 goto out;
763 }
764
765 if (tp->usrflags & SYM_SCAN_LUNS_DISABLED) {
766 if (sdev->lun != 0) {
767 error = -ENXIO;
768 goto out;
769 }
770 starget_printk(KERN_INFO, sdev->sdev_target,
771 "Multiple LUNs disabled in NVRAM\n");
772 }
773
774 lp = sym_alloc_lcb(np, sdev->id, sdev->lun);
775 if (!lp) {
776 error = -ENOMEM;
777 goto out;
778 }
779 if (tp->nlcb == 1)
780 tp->starget = sdev->sdev_target;
781
782 spi_min_period(tp->starget) = tp->usr_period;
783 spi_max_width(tp->starget) = tp->usr_width;
784
785 error = 0;
786 out:
787 spin_unlock_irqrestore(np->s.host->host_lock, flags);
788
789 return error;
790 }
791
792 /*
793 * Linux entry point for device queue sizing.
794 */
795 static int sym53c8xx_slave_configure(struct scsi_device *sdev)
796 {
797 struct sym_hcb *np = sym_get_hcb(sdev->host);
798 struct sym_tcb *tp = &np->target[sdev->id];
799 struct sym_lcb *lp = sym_lp(tp, sdev->lun);
800 int reqtags, depth_to_use;
801
802 /*
803 * Get user flags.
804 */
805 lp->curr_flags = lp->user_flags;
806
807 /*
808 * Select queue depth from driver setup.
809 * Do not use more than configured by user.
810 * Use at least 1.
811 * Do not use more than our maximum.
812 */
813 reqtags = sym_driver_setup.max_tag;
814 if (reqtags > tp->usrtags)
815 reqtags = tp->usrtags;
816 if (!sdev->tagged_supported)
817 reqtags = 0;
818 if (reqtags > SYM_CONF_MAX_TAG)
819 reqtags = SYM_CONF_MAX_TAG;
820 depth_to_use = reqtags ? reqtags : 1;
821 scsi_adjust_queue_depth(sdev,
822 sdev->tagged_supported ? MSG_SIMPLE_TAG : 0,
823 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 spin_lock_irqsave(np->s.host->host_lock, flags);
841
842 if (lp->busy_itlq || lp->busy_itl) {
843 /*
844 * This really shouldn't happen, but we can't return an error
845 * so let's try to stop all on-going I/O.
846 */
847 starget_printk(KERN_WARNING, tp->starget,
848 "Removing busy LCB (%d)\n", sdev->lun);
849 sym_reset_scsi_bus(np, 1);
850 }
851
852 if (sym_free_lcb(np, sdev->id, sdev->lun) == 0) {
853 /*
854 * It was the last unit for this target.
855 */
856 tp->head.sval = 0;
857 tp->head.wval = np->rv_scntl3;
858 tp->head.uval = 0;
859 tp->tgoal.check_nego = 1;
860 tp->starget = NULL;
861 }
862
863 spin_unlock_irqrestore(np->s.host->host_lock, flags);
864 }
865
866 /*
867 * Linux entry point for info() function
868 */
869 static const char *sym53c8xx_info (struct Scsi_Host *host)
870 {
871 return SYM_DRIVER_NAME;
872 }
873
874
875 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
876 /*
877 * Proc file system stuff
878 *
879 * A read operation returns adapter information.
880 * A write operation is a control command.
881 * The string is parsed in the driver code and the command is passed
882 * to the sym_usercmd() function.
883 */
884
885 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
886
887 struct sym_usrcmd {
888 u_long target;
889 u_long lun;
890 u_long data;
891 u_long cmd;
892 };
893
894 #define UC_SETSYNC 10
895 #define UC_SETTAGS 11
896 #define UC_SETDEBUG 12
897 #define UC_SETWIDE 14
898 #define UC_SETFLAG 15
899 #define UC_SETVERBOSE 17
900 #define UC_RESETDEV 18
901 #define UC_CLEARDEV 19
902
903 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
904 {
905 struct sym_tcb *tp;
906 int t, l;
907
908 switch (uc->cmd) {
909 case 0: return;
910
911 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
912 case UC_SETDEBUG:
913 sym_debug_flags = uc->data;
914 break;
915 #endif
916 case UC_SETVERBOSE:
917 np->verbose = uc->data;
918 break;
919 default:
920 /*
921 * We assume that other commands apply to targets.
922 * This should always be the case and avoid the below
923 * 4 lines to be repeated 6 times.
924 */
925 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
926 if (!((uc->target >> t) & 1))
927 continue;
928 tp = &np->target[t];
929 if (!tp->nlcb)
930 continue;
931
932 switch (uc->cmd) {
933
934 case UC_SETSYNC:
935 if (!uc->data || uc->data >= 255) {
936 tp->tgoal.iu = tp->tgoal.dt =
937 tp->tgoal.qas = 0;
938 tp->tgoal.offset = 0;
939 } else if (uc->data <= 9 && np->minsync_dt) {
940 if (uc->data < np->minsync_dt)
941 uc->data = np->minsync_dt;
942 tp->tgoal.iu = tp->tgoal.dt =
943 tp->tgoal.qas = 1;
944 tp->tgoal.width = 1;
945 tp->tgoal.period = uc->data;
946 tp->tgoal.offset = np->maxoffs_dt;
947 } else {
948 if (uc->data < np->minsync)
949 uc->data = np->minsync;
950 tp->tgoal.iu = tp->tgoal.dt =
951 tp->tgoal.qas = 0;
952 tp->tgoal.period = uc->data;
953 tp->tgoal.offset = np->maxoffs;
954 }
955 tp->tgoal.check_nego = 1;
956 break;
957 case UC_SETWIDE:
958 tp->tgoal.width = uc->data ? 1 : 0;
959 tp->tgoal.check_nego = 1;
960 break;
961 case UC_SETTAGS:
962 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
963 sym_tune_dev_queuing(tp, l, uc->data);
964 break;
965 case UC_RESETDEV:
966 tp->to_reset = 1;
967 np->istat_sem = SEM;
968 OUTB(np, nc_istat, SIGP|SEM);
969 break;
970 case UC_CLEARDEV:
971 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
972 struct sym_lcb *lp = sym_lp(tp, l);
973 if (lp) lp->to_clear = 1;
974 }
975 np->istat_sem = SEM;
976 OUTB(np, nc_istat, SIGP|SEM);
977 break;
978 case UC_SETFLAG:
979 tp->usrflags = uc->data;
980 break;
981 }
982 }
983 break;
984 }
985 }
986
987 static int sym_skip_spaces(char *ptr, int len)
988 {
989 int cnt, c;
990
991 for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
992
993 return (len - cnt);
994 }
995
996 static int get_int_arg(char *ptr, int len, u_long *pv)
997 {
998 char *end;
999
1000 *pv = simple_strtoul(ptr, &end, 10);
1001 return (end - ptr);
1002 }
1003
1004 static int is_keyword(char *ptr, int len, char *verb)
1005 {
1006 int verb_len = strlen(verb);
1007
1008 if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1009 return verb_len;
1010 else
1011 return 0;
1012 }
1013
1014 #define SKIP_SPACES(ptr, len) \
1015 if ((arg_len = sym_skip_spaces(ptr, len)) < 1) \
1016 return -EINVAL; \
1017 ptr += arg_len; len -= arg_len;
1018
1019 #define GET_INT_ARG(ptr, len, v) \
1020 if (!(arg_len = get_int_arg(ptr, len, &(v)))) \
1021 return -EINVAL; \
1022 ptr += arg_len; len -= arg_len;
1023
1024
1025 /*
1026 * Parse a control command
1027 */
1028
1029 static int sym_user_command(struct Scsi_Host *shost, char *buffer, int length)
1030 {
1031 struct sym_hcb *np = sym_get_hcb(shost);
1032 char *ptr = buffer;
1033 int len = length;
1034 struct sym_usrcmd cmd, *uc = &cmd;
1035 int arg_len;
1036 u_long target;
1037
1038 memset(uc, 0, sizeof(*uc));
1039
1040 if (len > 0 && ptr[len-1] == '\n')
1041 --len;
1042
1043 if ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1044 uc->cmd = UC_SETSYNC;
1045 else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1046 uc->cmd = UC_SETTAGS;
1047 else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1048 uc->cmd = UC_SETVERBOSE;
1049 else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1050 uc->cmd = UC_SETWIDE;
1051 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1052 else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1053 uc->cmd = UC_SETDEBUG;
1054 #endif
1055 else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1056 uc->cmd = UC_SETFLAG;
1057 else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1058 uc->cmd = UC_RESETDEV;
1059 else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1060 uc->cmd = UC_CLEARDEV;
1061 else
1062 arg_len = 0;
1063
1064 #ifdef DEBUG_PROC_INFO
1065 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1066 #endif
1067
1068 if (!arg_len)
1069 return -EINVAL;
1070 ptr += arg_len; len -= arg_len;
1071
1072 switch(uc->cmd) {
1073 case UC_SETSYNC:
1074 case UC_SETTAGS:
1075 case UC_SETWIDE:
1076 case UC_SETFLAG:
1077 case UC_RESETDEV:
1078 case UC_CLEARDEV:
1079 SKIP_SPACES(ptr, len);
1080 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1081 ptr += arg_len; len -= arg_len;
1082 uc->target = ~0;
1083 } else {
1084 GET_INT_ARG(ptr, len, target);
1085 uc->target = (1<<target);
1086 #ifdef DEBUG_PROC_INFO
1087 printk("sym_user_command: target=%ld\n", target);
1088 #endif
1089 }
1090 break;
1091 }
1092
1093 switch(uc->cmd) {
1094 case UC_SETVERBOSE:
1095 case UC_SETSYNC:
1096 case UC_SETTAGS:
1097 case UC_SETWIDE:
1098 SKIP_SPACES(ptr, len);
1099 GET_INT_ARG(ptr, len, uc->data);
1100 #ifdef DEBUG_PROC_INFO
1101 printk("sym_user_command: data=%ld\n", uc->data);
1102 #endif
1103 break;
1104 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1105 case UC_SETDEBUG:
1106 while (len > 0) {
1107 SKIP_SPACES(ptr, len);
1108 if ((arg_len = is_keyword(ptr, len, "alloc")))
1109 uc->data |= DEBUG_ALLOC;
1110 else if ((arg_len = is_keyword(ptr, len, "phase")))
1111 uc->data |= DEBUG_PHASE;
1112 else if ((arg_len = is_keyword(ptr, len, "queue")))
1113 uc->data |= DEBUG_QUEUE;
1114 else if ((arg_len = is_keyword(ptr, len, "result")))
1115 uc->data |= DEBUG_RESULT;
1116 else if ((arg_len = is_keyword(ptr, len, "scatter")))
1117 uc->data |= DEBUG_SCATTER;
1118 else if ((arg_len = is_keyword(ptr, len, "script")))
1119 uc->data |= DEBUG_SCRIPT;
1120 else if ((arg_len = is_keyword(ptr, len, "tiny")))
1121 uc->data |= DEBUG_TINY;
1122 else if ((arg_len = is_keyword(ptr, len, "timing")))
1123 uc->data |= DEBUG_TIMING;
1124 else if ((arg_len = is_keyword(ptr, len, "nego")))
1125 uc->data |= DEBUG_NEGO;
1126 else if ((arg_len = is_keyword(ptr, len, "tags")))
1127 uc->data |= DEBUG_TAGS;
1128 else if ((arg_len = is_keyword(ptr, len, "pointer")))
1129 uc->data |= DEBUG_POINTER;
1130 else
1131 return -EINVAL;
1132 ptr += arg_len; len -= arg_len;
1133 }
1134 #ifdef DEBUG_PROC_INFO
1135 printk("sym_user_command: data=%ld\n", uc->data);
1136 #endif
1137 break;
1138 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1139 case UC_SETFLAG:
1140 while (len > 0) {
1141 SKIP_SPACES(ptr, len);
1142 if ((arg_len = is_keyword(ptr, len, "no_disc")))
1143 uc->data &= ~SYM_DISC_ENABLED;
1144 else
1145 return -EINVAL;
1146 ptr += arg_len; len -= arg_len;
1147 }
1148 break;
1149 default:
1150 break;
1151 }
1152
1153 if (len)
1154 return -EINVAL;
1155 else {
1156 unsigned long flags;
1157
1158 spin_lock_irqsave(shost->host_lock, flags);
1159 sym_exec_user_command(np, uc);
1160 spin_unlock_irqrestore(shost->host_lock, flags);
1161 }
1162 return length;
1163 }
1164
1165 #endif /* SYM_LINUX_USER_COMMAND_SUPPORT */
1166
1167
1168 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1169 /*
1170 * Informations through the proc file system.
1171 */
1172 struct info_str {
1173 char *buffer;
1174 int length;
1175 int offset;
1176 int pos;
1177 };
1178
1179 static void copy_mem_info(struct info_str *info, char *data, int len)
1180 {
1181 if (info->pos + len > info->length)
1182 len = info->length - info->pos;
1183
1184 if (info->pos + len < info->offset) {
1185 info->pos += len;
1186 return;
1187 }
1188 if (info->pos < info->offset) {
1189 data += (info->offset - info->pos);
1190 len -= (info->offset - info->pos);
1191 }
1192
1193 if (len > 0) {
1194 memcpy(info->buffer + info->pos, data, len);
1195 info->pos += len;
1196 }
1197 }
1198
1199 static int copy_info(struct info_str *info, char *fmt, ...)
1200 {
1201 va_list args;
1202 char buf[81];
1203 int len;
1204
1205 va_start(args, fmt);
1206 len = vsprintf(buf, fmt, args);
1207 va_end(args);
1208
1209 copy_mem_info(info, buf, len);
1210 return len;
1211 }
1212
1213 /*
1214 * Copy formatted information into the input buffer.
1215 */
1216 static int sym_host_info(struct Scsi_Host *shost, char *ptr, off_t offset, int len)
1217 {
1218 struct sym_data *sym_data = shost_priv(shost);
1219 struct pci_dev *pdev = sym_data->pdev;
1220 struct sym_hcb *np = sym_data->ncb;
1221 struct info_str info;
1222
1223 info.buffer = ptr;
1224 info.length = len;
1225 info.offset = offset;
1226 info.pos = 0;
1227
1228 copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1229 "revision id 0x%x\n", np->s.chip_name,
1230 pdev->device, pdev->revision);
1231 copy_info(&info, "At PCI address %s, IRQ %u\n",
1232 pci_name(pdev), pdev->irq);
1233 copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1234 (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1235 np->maxwide ? "Wide" : "Narrow",
1236 np->minsync_dt ? ", DT capable" : "");
1237
1238 copy_info(&info, "Max. started commands %d, "
1239 "max. commands per LUN %d\n",
1240 SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1241
1242 return info.pos > info.offset? info.pos - info.offset : 0;
1243 }
1244 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1245
1246 /*
1247 * Entry point of the scsi proc fs of the driver.
1248 * - func = 0 means read (returns adapter infos)
1249 * - func = 1 means write (not yet merget from sym53c8xx)
1250 */
1251 static int sym53c8xx_proc_info(struct Scsi_Host *shost, char *buffer,
1252 char **start, off_t offset, int length, int func)
1253 {
1254 int retv;
1255
1256 if (func) {
1257 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1258 retv = sym_user_command(shost, buffer, length);
1259 #else
1260 retv = -EINVAL;
1261 #endif
1262 } else {
1263 if (start)
1264 *start = buffer;
1265 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1266 retv = sym_host_info(shost, buffer, offset, length);
1267 #else
1268 retv = -EINVAL;
1269 #endif
1270 }
1271
1272 return retv;
1273 }
1274 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1275
1276 /*
1277 * Free resources claimed by sym_iomap_device(). Note that
1278 * sym_free_resources() should be used instead of this function after calling
1279 * sym_attach().
1280 */
1281 static void __devinit
1282 sym_iounmap_device(struct sym_device *device)
1283 {
1284 if (device->s.ioaddr)
1285 pci_iounmap(device->pdev, device->s.ioaddr);
1286 if (device->s.ramaddr)
1287 pci_iounmap(device->pdev, device->s.ramaddr);
1288 }
1289
1290 /*
1291 * Free controller resources.
1292 */
1293 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev,
1294 int do_free_irq)
1295 {
1296 /*
1297 * Free O/S specific resources.
1298 */
1299 if (do_free_irq)
1300 free_irq(pdev->irq, np->s.host);
1301 if (np->s.ioaddr)
1302 pci_iounmap(pdev, np->s.ioaddr);
1303 if (np->s.ramaddr)
1304 pci_iounmap(pdev, np->s.ramaddr);
1305 /*
1306 * Free O/S independent resources.
1307 */
1308 sym_hcb_free(np);
1309
1310 sym_mfree_dma(np, sizeof(*np), "HCB");
1311 }
1312
1313 /*
1314 * Host attach and initialisations.
1315 *
1316 * Allocate host data and ncb structure.
1317 * Remap MMIO region.
1318 * Do chip initialization.
1319 * If all is OK, install interrupt handling and
1320 * start the timer daemon.
1321 */
1322 static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1323 int unit, struct sym_device *dev)
1324 {
1325 struct sym_data *sym_data;
1326 struct sym_hcb *np = NULL;
1327 struct Scsi_Host *shost = NULL;
1328 struct pci_dev *pdev = dev->pdev;
1329 unsigned long flags;
1330 struct sym_fw *fw;
1331 int do_free_irq = 0;
1332
1333 printk(KERN_INFO "sym%d: <%s> rev 0x%x at pci %s irq %u\n",
1334 unit, dev->chip.name, pdev->revision, pci_name(pdev),
1335 pdev->irq);
1336
1337 /*
1338 * Get the firmware for this chip.
1339 */
1340 fw = sym_find_firmware(&dev->chip);
1341 if (!fw)
1342 goto attach_failed;
1343
1344 shost = scsi_host_alloc(tpnt, sizeof(*sym_data));
1345 if (!shost)
1346 goto attach_failed;
1347 sym_data = shost_priv(shost);
1348
1349 /*
1350 * Allocate immediately the host control block,
1351 * since we are only expecting to succeed. :)
1352 * We keep track in the HCB of all the resources that
1353 * are to be released on error.
1354 */
1355 np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1356 if (!np)
1357 goto attach_failed;
1358 np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1359 sym_data->ncb = np;
1360 sym_data->pdev = pdev;
1361 np->s.host = shost;
1362
1363 pci_set_drvdata(pdev, shost);
1364
1365 /*
1366 * Copy some useful infos to the HCB.
1367 */
1368 np->hcb_ba = vtobus(np);
1369 np->verbose = sym_driver_setup.verbose;
1370 np->s.unit = unit;
1371 np->features = dev->chip.features;
1372 np->clock_divn = dev->chip.nr_divisor;
1373 np->maxoffs = dev->chip.offset_max;
1374 np->maxburst = dev->chip.burst_max;
1375 np->myaddr = dev->host_id;
1376 np->mmio_ba = (u32)dev->mmio_base;
1377 np->ram_ba = (u32)dev->ram_base;
1378 np->s.ioaddr = dev->s.ioaddr;
1379 np->s.ramaddr = dev->s.ramaddr;
1380
1381 /*
1382 * Edit its name.
1383 */
1384 strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1385 sprintf(np->s.inst_name, "sym%d", np->s.unit);
1386
1387 if ((SYM_CONF_DMA_ADDRESSING_MODE > 0) && (np->features & FE_DAC) &&
1388 !pci_set_dma_mask(pdev, DMA_DAC_MASK)) {
1389 set_dac(np);
1390 } else if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
1391 printf_warning("%s: No suitable DMA available\n", sym_name(np));
1392 goto attach_failed;
1393 }
1394
1395 if (sym_hcb_attach(shost, fw, dev->nvram))
1396 goto attach_failed;
1397
1398 /*
1399 * Install the interrupt handler.
1400 * If we synchonize the C code with SCRIPTS on interrupt,
1401 * we do not want to share the INTR line at all.
1402 */
1403 if (request_irq(pdev->irq, sym53c8xx_intr, IRQF_SHARED, NAME53C8XX,
1404 shost)) {
1405 printf_err("%s: request irq %u failure\n",
1406 sym_name(np), pdev->irq);
1407 goto attach_failed;
1408 }
1409 do_free_irq = 1;
1410
1411 /*
1412 * After SCSI devices have been opened, we cannot
1413 * reset the bus safely, so we do it here.
1414 */
1415 spin_lock_irqsave(shost->host_lock, flags);
1416 if (sym_reset_scsi_bus(np, 0))
1417 goto reset_failed;
1418
1419 /*
1420 * Start the SCRIPTS.
1421 */
1422 sym_start_up(shost, 1);
1423
1424 /*
1425 * Start the timer daemon
1426 */
1427 init_timer(&np->s.timer);
1428 np->s.timer.data = (unsigned long) np;
1429 np->s.timer.function = sym53c8xx_timer;
1430 np->s.lasttime=0;
1431 sym_timer (np);
1432
1433 /*
1434 * Fill Linux host instance structure
1435 * and return success.
1436 */
1437 shost->max_channel = 0;
1438 shost->this_id = np->myaddr;
1439 shost->max_id = np->maxwide ? 16 : 8;
1440 shost->max_lun = SYM_CONF_MAX_LUN;
1441 shost->unique_id = pci_resource_start(pdev, 0);
1442 shost->cmd_per_lun = SYM_CONF_MAX_TAG;
1443 shost->can_queue = (SYM_CONF_MAX_START-2);
1444 shost->sg_tablesize = SYM_CONF_MAX_SG;
1445 shost->max_cmd_len = 16;
1446 BUG_ON(sym2_transport_template == NULL);
1447 shost->transportt = sym2_transport_template;
1448
1449 /* 53c896 rev 1 errata: DMA may not cross 16MB boundary */
1450 if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 2)
1451 shost->dma_boundary = 0xFFFFFF;
1452
1453 spin_unlock_irqrestore(shost->host_lock, flags);
1454
1455 return shost;
1456
1457 reset_failed:
1458 printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1459 "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1460 spin_unlock_irqrestore(shost->host_lock, flags);
1461 attach_failed:
1462 printf_info("sym%d: giving up ...\n", unit);
1463 if (np)
1464 sym_free_resources(np, pdev, do_free_irq);
1465 else
1466 sym_iounmap_device(dev);
1467 if (shost)
1468 scsi_host_put(shost);
1469
1470 return NULL;
1471 }
1472
1473
1474 /*
1475 * Detect and try to read SYMBIOS and TEKRAM NVRAM.
1476 */
1477 #if SYM_CONF_NVRAM_SUPPORT
1478 static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1479 {
1480 devp->nvram = nvp;
1481 nvp->type = 0;
1482
1483 sym_read_nvram(devp, nvp);
1484 }
1485 #else
1486 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1487 {
1488 }
1489 #endif /* SYM_CONF_NVRAM_SUPPORT */
1490
1491 static int __devinit sym_check_supported(struct sym_device *device)
1492 {
1493 struct sym_chip *chip;
1494 struct pci_dev *pdev = device->pdev;
1495 unsigned long io_port = pci_resource_start(pdev, 0);
1496 int i;
1497
1498 /*
1499 * If user excluded this chip, do not initialize it.
1500 * I hate this code so much. Must kill it.
1501 */
1502 if (io_port) {
1503 for (i = 0 ; i < 8 ; i++) {
1504 if (sym_driver_setup.excludes[i] == io_port)
1505 return -ENODEV;
1506 }
1507 }
1508
1509 /*
1510 * Check if the chip is supported. Then copy the chip description
1511 * to our device structure so we can make it match the actual device
1512 * and options.
1513 */
1514 chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1515 if (!chip) {
1516 dev_info(&pdev->dev, "device not supported\n");
1517 return -ENODEV;
1518 }
1519 memcpy(&device->chip, chip, sizeof(device->chip));
1520
1521 return 0;
1522 }
1523
1524 /*
1525 * Ignore Symbios chips controlled by various RAID controllers.
1526 * These controllers set value 0x52414944 at RAM end - 16.
1527 */
1528 static int __devinit sym_check_raid(struct sym_device *device)
1529 {
1530 unsigned int ram_size, ram_val;
1531
1532 if (!device->s.ramaddr)
1533 return 0;
1534
1535 if (device->chip.features & FE_RAM8K)
1536 ram_size = 8192;
1537 else
1538 ram_size = 4096;
1539
1540 ram_val = readl(device->s.ramaddr + ram_size - 16);
1541 if (ram_val != 0x52414944)
1542 return 0;
1543
1544 dev_info(&device->pdev->dev,
1545 "not initializing, driven by RAID controller.\n");
1546 return -ENODEV;
1547 }
1548
1549 static int __devinit sym_set_workarounds(struct sym_device *device)
1550 {
1551 struct sym_chip *chip = &device->chip;
1552 struct pci_dev *pdev = device->pdev;
1553 u_short status_reg;
1554
1555 /*
1556 * (ITEM 12 of a DEL about the 896 I haven't yet).
1557 * We must ensure the chip will use WRITE AND INVALIDATE.
1558 * The revision number limit is for now arbitrary.
1559 */
1560 if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 0x4) {
1561 chip->features |= (FE_WRIE | FE_CLSE);
1562 }
1563
1564 /* If the chip can do Memory Write Invalidate, enable it */
1565 if (chip->features & FE_WRIE) {
1566 if (pci_set_mwi(pdev))
1567 return -ENODEV;
1568 }
1569
1570 /*
1571 * Work around for errant bit in 895A. The 66Mhz
1572 * capable bit is set erroneously. Clear this bit.
1573 * (Item 1 DEL 533)
1574 *
1575 * Make sure Config space and Features agree.
1576 *
1577 * Recall: writes are not normal to status register -
1578 * write a 1 to clear and a 0 to leave unchanged.
1579 * Can only reset bits.
1580 */
1581 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1582 if (chip->features & FE_66MHZ) {
1583 if (!(status_reg & PCI_STATUS_66MHZ))
1584 chip->features &= ~FE_66MHZ;
1585 } else {
1586 if (status_reg & PCI_STATUS_66MHZ) {
1587 status_reg = PCI_STATUS_66MHZ;
1588 pci_write_config_word(pdev, PCI_STATUS, status_reg);
1589 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1590 }
1591 }
1592
1593 return 0;
1594 }
1595
1596 /*
1597 * Map HBA registers and on-chip SRAM (if present).
1598 */
1599 static int __devinit
1600 sym_iomap_device(struct sym_device *device)
1601 {
1602 struct pci_dev *pdev = device->pdev;
1603 struct pci_bus_region bus_addr;
1604 int i = 2;
1605
1606 pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[1]);
1607 device->mmio_base = bus_addr.start;
1608
1609 if (device->chip.features & FE_RAM) {
1610 /*
1611 * If the BAR is 64-bit, resource 2 will be occupied by the
1612 * upper 32 bits
1613 */
1614 if (!pdev->resource[i].flags)
1615 i++;
1616 pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[i]);
1617 device->ram_base = bus_addr.start;
1618 }
1619
1620 #ifdef CONFIG_SCSI_SYM53C8XX_MMIO
1621 if (device->mmio_base)
1622 device->s.ioaddr = pci_iomap(pdev, 1,
1623 pci_resource_len(pdev, 1));
1624 #endif
1625 if (!device->s.ioaddr)
1626 device->s.ioaddr = pci_iomap(pdev, 0,
1627 pci_resource_len(pdev, 0));
1628 if (!device->s.ioaddr) {
1629 dev_err(&pdev->dev, "could not map registers; giving up.\n");
1630 return -EIO;
1631 }
1632 if (device->ram_base) {
1633 device->s.ramaddr = pci_iomap(pdev, i,
1634 pci_resource_len(pdev, i));
1635 if (!device->s.ramaddr) {
1636 dev_warn(&pdev->dev,
1637 "could not map SRAM; continuing anyway.\n");
1638 device->ram_base = 0;
1639 }
1640 }
1641
1642 return 0;
1643 }
1644
1645 /*
1646 * The NCR PQS and PDS cards are constructed as a DEC bridge
1647 * behind which sits a proprietary NCR memory controller and
1648 * either four or two 53c875s as separate devices. We can tell
1649 * if an 875 is part of a PQS/PDS or not since if it is, it will
1650 * be on the same bus as the memory controller. In its usual
1651 * mode of operation, the 875s are slaved to the memory
1652 * controller for all transfers. To operate with the Linux
1653 * driver, the memory controller is disabled and the 875s
1654 * freed to function independently. The only wrinkle is that
1655 * the preset SCSI ID (which may be zero) must be read in from
1656 * a special configuration space register of the 875.
1657 */
1658 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1659 {
1660 int slot;
1661 u8 tmp;
1662
1663 for (slot = 0; slot < 256; slot++) {
1664 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1665
1666 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1667 pci_dev_put(memc);
1668 continue;
1669 }
1670
1671 /* bit 1: allow individual 875 configuration */
1672 pci_read_config_byte(memc, 0x44, &tmp);
1673 if ((tmp & 0x2) == 0) {
1674 tmp |= 0x2;
1675 pci_write_config_byte(memc, 0x44, tmp);
1676 }
1677
1678 /* bit 2: drive individual 875 interrupts to the bus */
1679 pci_read_config_byte(memc, 0x45, &tmp);
1680 if ((tmp & 0x4) == 0) {
1681 tmp |= 0x4;
1682 pci_write_config_byte(memc, 0x45, tmp);
1683 }
1684
1685 pci_dev_put(memc);
1686 break;
1687 }
1688
1689 pci_read_config_byte(pdev, 0x84, &tmp);
1690 sym_dev->host_id = tmp;
1691 }
1692
1693 /*
1694 * Called before unloading the module.
1695 * Detach the host.
1696 * We have to free resources and halt the NCR chip.
1697 */
1698 static int sym_detach(struct Scsi_Host *shost, struct pci_dev *pdev)
1699 {
1700 struct sym_hcb *np = sym_get_hcb(shost);
1701 printk("%s: detaching ...\n", sym_name(np));
1702
1703 del_timer_sync(&np->s.timer);
1704
1705 /*
1706 * Reset NCR chip.
1707 * We should use sym_soft_reset(), but we don't want to do
1708 * so, since we may not be safe if interrupts occur.
1709 */
1710 printk("%s: resetting chip\n", sym_name(np));
1711 OUTB(np, nc_istat, SRST);
1712 INB(np, nc_mbox1);
1713 udelay(10);
1714 OUTB(np, nc_istat, 0);
1715
1716 sym_free_resources(np, pdev, 1);
1717 scsi_host_put(shost);
1718
1719 return 1;
1720 }
1721
1722 /*
1723 * Driver host template.
1724 */
1725 static struct scsi_host_template sym2_template = {
1726 .module = THIS_MODULE,
1727 .name = "sym53c8xx",
1728 .info = sym53c8xx_info,
1729 .queuecommand = sym53c8xx_queue_command,
1730 .slave_alloc = sym53c8xx_slave_alloc,
1731 .slave_configure = sym53c8xx_slave_configure,
1732 .slave_destroy = sym53c8xx_slave_destroy,
1733 .eh_abort_handler = sym53c8xx_eh_abort_handler,
1734 .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1735 .eh_bus_reset_handler = sym53c8xx_eh_bus_reset_handler,
1736 .eh_host_reset_handler = sym53c8xx_eh_host_reset_handler,
1737 .this_id = 7,
1738 .use_clustering = ENABLE_CLUSTERING,
1739 .max_sectors = 0xFFFF,
1740 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1741 .proc_info = sym53c8xx_proc_info,
1742 .proc_name = NAME53C8XX,
1743 #endif
1744 };
1745
1746 static int attach_count;
1747
1748 static int __devinit sym2_probe(struct pci_dev *pdev,
1749 const struct pci_device_id *ent)
1750 {
1751 struct sym_device sym_dev;
1752 struct sym_nvram nvram;
1753 struct Scsi_Host *shost;
1754 int do_iounmap = 0;
1755 int do_disable_device = 1;
1756
1757 memset(&sym_dev, 0, sizeof(sym_dev));
1758 memset(&nvram, 0, sizeof(nvram));
1759 sym_dev.pdev = pdev;
1760 sym_dev.host_id = SYM_SETUP_HOST_ID;
1761
1762 if (pci_enable_device(pdev))
1763 goto leave;
1764
1765 pci_set_master(pdev);
1766
1767 if (pci_request_regions(pdev, NAME53C8XX))
1768 goto disable;
1769
1770 if (sym_check_supported(&sym_dev))
1771 goto free;
1772
1773 if (sym_iomap_device(&sym_dev))
1774 goto free;
1775 do_iounmap = 1;
1776
1777 if (sym_check_raid(&sym_dev)) {
1778 do_disable_device = 0; /* Don't disable the device */
1779 goto free;
1780 }
1781
1782 if (sym_set_workarounds(&sym_dev))
1783 goto free;
1784
1785 sym_config_pqs(pdev, &sym_dev);
1786
1787 sym_get_nvram(&sym_dev, &nvram);
1788
1789 do_iounmap = 0; /* Don't sym_iounmap_device() after sym_attach(). */
1790 shost = sym_attach(&sym2_template, attach_count, &sym_dev);
1791 if (!shost)
1792 goto free;
1793
1794 if (scsi_add_host(shost, &pdev->dev))
1795 goto detach;
1796 scsi_scan_host(shost);
1797
1798 attach_count++;
1799
1800 return 0;
1801
1802 detach:
1803 sym_detach(pci_get_drvdata(pdev), pdev);
1804 free:
1805 if (do_iounmap)
1806 sym_iounmap_device(&sym_dev);
1807 pci_release_regions(pdev);
1808 disable:
1809 if (do_disable_device)
1810 pci_disable_device(pdev);
1811 leave:
1812 return -ENODEV;
1813 }
1814
1815 static void sym2_remove(struct pci_dev *pdev)
1816 {
1817 struct Scsi_Host *shost = pci_get_drvdata(pdev);
1818
1819 scsi_remove_host(shost);
1820 sym_detach(shost, pdev);
1821 pci_release_regions(pdev);
1822 pci_disable_device(pdev);
1823
1824 attach_count--;
1825 }
1826
1827 /**
1828 * sym2_io_error_detected() - called when PCI error is detected
1829 * @pdev: pointer to PCI device
1830 * @state: current state of the PCI slot
1831 */
1832 static pci_ers_result_t sym2_io_error_detected(struct pci_dev *pdev,
1833 enum pci_channel_state state)
1834 {
1835 /* If slot is permanently frozen, turn everything off */
1836 if (state == pci_channel_io_perm_failure) {
1837 sym2_remove(pdev);
1838 return PCI_ERS_RESULT_DISCONNECT;
1839 }
1840
1841 disable_irq(pdev->irq);
1842 pci_disable_device(pdev);
1843
1844 /* Request that MMIO be enabled, so register dump can be taken. */
1845 return PCI_ERS_RESULT_CAN_RECOVER;
1846 }
1847
1848 /**
1849 * sym2_io_slot_dump - Enable MMIO and dump debug registers
1850 * @pdev: pointer to PCI device
1851 */
1852 static pci_ers_result_t sym2_io_slot_dump(struct pci_dev *pdev)
1853 {
1854 struct Scsi_Host *shost = pci_get_drvdata(pdev);
1855
1856 sym_dump_registers(shost);
1857
1858 /* Request a slot reset. */
1859 return PCI_ERS_RESULT_NEED_RESET;
1860 }
1861
1862 /**
1863 * sym2_reset_workarounds - hardware-specific work-arounds
1864 *
1865 * This routine is similar to sym_set_workarounds(), except
1866 * that, at this point, we already know that the device was
1867 * successfully intialized at least once before, and so most
1868 * of the steps taken there are un-needed here.
1869 */
1870 static void sym2_reset_workarounds(struct pci_dev *pdev)
1871 {
1872 u_short status_reg;
1873 struct sym_chip *chip;
1874
1875 chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1876
1877 /* Work around for errant bit in 895A, in a fashion
1878 * similar to what is done in sym_set_workarounds().
1879 */
1880 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1881 if (!(chip->features & FE_66MHZ) && (status_reg & PCI_STATUS_66MHZ)) {
1882 status_reg = PCI_STATUS_66MHZ;
1883 pci_write_config_word(pdev, PCI_STATUS, status_reg);
1884 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1885 }
1886 }
1887
1888 /**
1889 * sym2_io_slot_reset() - called when the pci bus has been reset.
1890 * @pdev: pointer to PCI device
1891 *
1892 * Restart the card from scratch.
1893 */
1894 static pci_ers_result_t sym2_io_slot_reset(struct pci_dev *pdev)
1895 {
1896 struct Scsi_Host *shost = pci_get_drvdata(pdev);
1897 struct sym_hcb *np = sym_get_hcb(shost);
1898
1899 printk(KERN_INFO "%s: recovering from a PCI slot reset\n",
1900 sym_name(np));
1901
1902 if (pci_enable_device(pdev)) {
1903 printk(KERN_ERR "%s: Unable to enable after PCI reset\n",
1904 sym_name(np));
1905 return PCI_ERS_RESULT_DISCONNECT;
1906 }
1907
1908 pci_set_master(pdev);
1909 enable_irq(pdev->irq);
1910
1911 /* If the chip can do Memory Write Invalidate, enable it */
1912 if (np->features & FE_WRIE) {
1913 if (pci_set_mwi(pdev))
1914 return PCI_ERS_RESULT_DISCONNECT;
1915 }
1916
1917 /* Perform work-arounds, analogous to sym_set_workarounds() */
1918 sym2_reset_workarounds(pdev);
1919
1920 /* Perform host reset only on one instance of the card */
1921 if (PCI_FUNC(pdev->devfn) == 0) {
1922 if (sym_reset_scsi_bus(np, 0)) {
1923 printk(KERN_ERR "%s: Unable to reset scsi host\n",
1924 sym_name(np));
1925 return PCI_ERS_RESULT_DISCONNECT;
1926 }
1927 sym_start_up(shost, 1);
1928 }
1929
1930 return PCI_ERS_RESULT_RECOVERED;
1931 }
1932
1933 /**
1934 * sym2_io_resume() - resume normal ops after PCI reset
1935 * @pdev: pointer to PCI device
1936 *
1937 * Called when the error recovery driver tells us that its
1938 * OK to resume normal operation. Use completion to allow
1939 * halted scsi ops to resume.
1940 */
1941 static void sym2_io_resume(struct pci_dev *pdev)
1942 {
1943 struct Scsi_Host *shost = pci_get_drvdata(pdev);
1944 struct sym_data *sym_data = shost_priv(shost);
1945
1946 spin_lock_irq(shost->host_lock);
1947 if (sym_data->io_reset)
1948 complete_all(sym_data->io_reset);
1949 spin_unlock_irq(shost->host_lock);
1950 }
1951
1952 static void sym2_get_signalling(struct Scsi_Host *shost)
1953 {
1954 struct sym_hcb *np = sym_get_hcb(shost);
1955 enum spi_signal_type type;
1956
1957 switch (np->scsi_mode) {
1958 case SMODE_SE:
1959 type = SPI_SIGNAL_SE;
1960 break;
1961 case SMODE_LVD:
1962 type = SPI_SIGNAL_LVD;
1963 break;
1964 case SMODE_HVD:
1965 type = SPI_SIGNAL_HVD;
1966 break;
1967 default:
1968 type = SPI_SIGNAL_UNKNOWN;
1969 break;
1970 }
1971 spi_signalling(shost) = type;
1972 }
1973
1974 static void sym2_set_offset(struct scsi_target *starget, int offset)
1975 {
1976 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1977 struct sym_hcb *np = sym_get_hcb(shost);
1978 struct sym_tcb *tp = &np->target[starget->id];
1979
1980 tp->tgoal.offset = offset;
1981 tp->tgoal.check_nego = 1;
1982 }
1983
1984 static void sym2_set_period(struct scsi_target *starget, int period)
1985 {
1986 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1987 struct sym_hcb *np = sym_get_hcb(shost);
1988 struct sym_tcb *tp = &np->target[starget->id];
1989
1990 /* have to have DT for these transfers, but DT will also
1991 * set width, so check that this is allowed */
1992 if (period <= np->minsync && spi_width(starget))
1993 tp->tgoal.dt = 1;
1994
1995 tp->tgoal.period = period;
1996 tp->tgoal.check_nego = 1;
1997 }
1998
1999 static void sym2_set_width(struct scsi_target *starget, int width)
2000 {
2001 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2002 struct sym_hcb *np = sym_get_hcb(shost);
2003 struct sym_tcb *tp = &np->target[starget->id];
2004
2005 /* It is illegal to have DT set on narrow transfers. If DT is
2006 * clear, we must also clear IU and QAS. */
2007 if (width == 0)
2008 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2009
2010 tp->tgoal.width = width;
2011 tp->tgoal.check_nego = 1;
2012 }
2013
2014 static void sym2_set_dt(struct scsi_target *starget, int dt)
2015 {
2016 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2017 struct sym_hcb *np = sym_get_hcb(shost);
2018 struct sym_tcb *tp = &np->target[starget->id];
2019
2020 /* We must clear QAS and IU if DT is clear */
2021 if (dt)
2022 tp->tgoal.dt = 1;
2023 else
2024 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2025 tp->tgoal.check_nego = 1;
2026 }
2027
2028 #if 0
2029 static void sym2_set_iu(struct scsi_target *starget, int iu)
2030 {
2031 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2032 struct sym_hcb *np = sym_get_hcb(shost);
2033 struct sym_tcb *tp = &np->target[starget->id];
2034
2035 if (iu)
2036 tp->tgoal.iu = tp->tgoal.dt = 1;
2037 else
2038 tp->tgoal.iu = 0;
2039 tp->tgoal.check_nego = 1;
2040 }
2041
2042 static void sym2_set_qas(struct scsi_target *starget, int qas)
2043 {
2044 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2045 struct sym_hcb *np = sym_get_hcb(shost);
2046 struct sym_tcb *tp = &np->target[starget->id];
2047
2048 if (qas)
2049 tp->tgoal.dt = tp->tgoal.qas = 1;
2050 else
2051 tp->tgoal.qas = 0;
2052 tp->tgoal.check_nego = 1;
2053 }
2054 #endif
2055
2056 static struct spi_function_template sym2_transport_functions = {
2057 .set_offset = sym2_set_offset,
2058 .show_offset = 1,
2059 .set_period = sym2_set_period,
2060 .show_period = 1,
2061 .set_width = sym2_set_width,
2062 .show_width = 1,
2063 .set_dt = sym2_set_dt,
2064 .show_dt = 1,
2065 #if 0
2066 .set_iu = sym2_set_iu,
2067 .show_iu = 1,
2068 .set_qas = sym2_set_qas,
2069 .show_qas = 1,
2070 #endif
2071 .get_signalling = sym2_get_signalling,
2072 };
2073
2074 static struct pci_device_id sym2_id_table[] __devinitdata = {
2075 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2076 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2077 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2078 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2079 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2080 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2081 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2082 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2083 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2084 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2085 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2086 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2087 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2088 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8, 0xffff00, 0UL },
2089 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2090 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2091 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2092 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2093 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2094 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2095 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2096 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2097 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2098 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8, 0xffff00, 0UL }, /* new */
2099 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2100 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2101 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2102 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2103 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2104 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2105 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2106 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2107 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2108 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2109 { 0, }
2110 };
2111
2112 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2113
2114 static struct pci_error_handlers sym2_err_handler = {
2115 .error_detected = sym2_io_error_detected,
2116 .mmio_enabled = sym2_io_slot_dump,
2117 .slot_reset = sym2_io_slot_reset,
2118 .resume = sym2_io_resume,
2119 };
2120
2121 static struct pci_driver sym2_driver = {
2122 .name = NAME53C8XX,
2123 .id_table = sym2_id_table,
2124 .probe = sym2_probe,
2125 .remove = sym2_remove,
2126 .err_handler = &sym2_err_handler,
2127 };
2128
2129 static int __init sym2_init(void)
2130 {
2131 int error;
2132
2133 sym2_setup_params();
2134 sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2135 if (!sym2_transport_template)
2136 return -ENODEV;
2137
2138 error = pci_register_driver(&sym2_driver);
2139 if (error)
2140 spi_release_transport(sym2_transport_template);
2141 return error;
2142 }
2143
2144 static void __exit sym2_exit(void)
2145 {
2146 pci_unregister_driver(&sym2_driver);
2147 spi_release_transport(sym2_transport_template);
2148 }
2149
2150 module_init(sym2_init);
2151 module_exit(sym2_exit);