1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
4 * of PCI-SCSI IO processors.
5 *
6 * Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
7 * Copyright (c) 2003-2005 Matthew Wilcox <matthew@wil.cx>
8 *
9 * This driver is derived from the Linux sym53c8xx driver.
10 * Copyright (C) 1998-2000 Gerard Roudier
11 *
12 * The sym53c8xx driver is derived from the ncr53c8xx driver that had been
13 * a port of the FreeBSD ncr driver to Linux-1.2.13.
14 *
15 * The original ncr driver has been written for 386bsd and FreeBSD by
16 * Wolfgang Stanglmeier <wolf@cologne.de>
17 * Stefan Esser <se@mi.Uni-Koeln.de>
18 * Copyright (C) 1994 Wolfgang Stanglmeier
19 *
20 * Other major contributions:
21 *
22 * NVRAM detection and reading.
23 * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
24 *
25 *-----------------------------------------------------------------------------
26 */
27 #include <linux/ctype.h>
28 #include <linux/init.h>
29 #include <linux/module.h>
30 #include <linux/moduleparam.h>
31 #include <linux/spinlock.h>
32 #include <scsi/scsi.h>
33 #include <scsi/scsi_tcq.h>
34 #include <scsi/scsi_device.h>
35 #include <scsi/scsi_transport.h>
36
37 #include "sym_glue.h"
38 #include "sym_nvram.h"
39
40 #define NAME53C "sym53c"
41 #define NAME53C8XX "sym53c8xx"
42
43 struct sym_driver_setup sym_driver_setup = SYM_LINUX_DRIVER_SETUP;
44 unsigned int sym_debug_flags = 0;
45
46 static char *excl_string;
47 static char *safe_string;
48 module_param_named(cmd_per_lun, sym_driver_setup.max_tag, ushort, 0);
49 module_param_named(burst, sym_driver_setup.burst_order, byte, 0);
50 module_param_named(led, sym_driver_setup.scsi_led, byte, 0);
51 module_param_named(diff, sym_driver_setup.scsi_diff, byte, 0);
52 module_param_named(irqm, sym_driver_setup.irq_mode, byte, 0);
53 module_param_named(buschk, sym_driver_setup.scsi_bus_check, byte, 0);
54 module_param_named(hostid, sym_driver_setup.host_id, byte, 0);
55 module_param_named(verb, sym_driver_setup.verbose, byte, 0);
56 module_param_named(debug, sym_debug_flags, uint, 0);
57 module_param_named(settle, sym_driver_setup.settle_delay, byte, 0);
58 module_param_named(nvram, sym_driver_setup.use_nvram, byte, 0);
59 module_param_named(excl, excl_string, charp, 0);
60 module_param_named(safe, safe_string, charp, 0);
61
62 MODULE_PARM_DESC(cmd_per_lun, "The maximum number of tags to use by default");
63 MODULE_PARM_DESC(burst, "Maximum burst. 0 to disable, 255 to read from registers");
64 MODULE_PARM_DESC(led, "Set to 1 to enable LED support");
65 MODULE_PARM_DESC(diff, "0 for no differential mode, 1 for BIOS, 2 for always, 3 for not GPIO3");
66 MODULE_PARM_DESC(irqm, "0 for open drain, 1 to leave alone, 2 for totem pole");
67 MODULE_PARM_DESC(buschk, "0 to not check, 1 for detach on error, 2 for warn on error");
68 MODULE_PARM_DESC(hostid, "The SCSI ID to use for the host adapters");
69 MODULE_PARM_DESC(verb, "0 for minimal verbosity, 1 for normal, 2 for excessive");
70 MODULE_PARM_DESC(debug, "Set bits to enable debugging");
71 MODULE_PARM_DESC(settle, "Settle delay in seconds. Default 3");
72 MODULE_PARM_DESC(nvram, "Option currently not used");
73 MODULE_PARM_DESC(excl, "List ioport addresses here to prevent controllers from being attached");
74 MODULE_PARM_DESC(safe, "Set other settings to a \"safe mode\"");
75
76 MODULE_LICENSE("GPL");
77 MODULE_VERSION(SYM_VERSION);
78 MODULE_AUTHOR("Matthew Wilcox <matthew@wil.cx>");
79 MODULE_DESCRIPTION("NCR, Symbios and LSI 8xx and 1010 PCI SCSI adapters");
80
sym2_setup_params(void)81 static void sym2_setup_params(void)
82 {
83 char *p = excl_string;
84 int xi = 0;
85
86 while (p && (xi < 8)) {
87 char *next_p;
88 int val = (int) simple_strtoul(p, &next_p, 0);
89 sym_driver_setup.excludes[xi++] = val;
90 p = next_p;
91 }
92
93 if (safe_string) {
94 if (*safe_string == 'y') {
95 sym_driver_setup.max_tag = 0;
96 sym_driver_setup.burst_order = 0;
97 sym_driver_setup.scsi_led = 0;
98 sym_driver_setup.scsi_diff = 1;
99 sym_driver_setup.irq_mode = 0;
100 sym_driver_setup.scsi_bus_check = 2;
101 sym_driver_setup.host_id = 7;
102 sym_driver_setup.verbose = 2;
103 sym_driver_setup.settle_delay = 10;
104 sym_driver_setup.use_nvram = 1;
105 } else if (*safe_string != 'n') {
106 printk(KERN_WARNING NAME53C8XX "Ignoring parameter %s"
107 " passed to safe option", safe_string);
108 }
109 }
110 }
111
112 static struct scsi_transport_template *sym2_transport_template = NULL;
113
114 /*
115 * Driver private area in the SCSI command structure.
116 */
117 struct sym_ucmd { /* Override the SCSI pointer structure */
118 struct completion *eh_done; /* SCSI error handling */
119 };
120
121 #define SYM_UCMD_PTR(cmd) ((struct sym_ucmd *)scsi_cmd_priv(cmd))
122 #define SYM_SOFTC_PTR(cmd) sym_get_hcb(cmd->device->host)
123
124 /*
125 * Complete a pending CAM CCB.
126 */
sym_xpt_done(struct sym_hcb * np,struct scsi_cmnd * cmd)127 void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *cmd)
128 {
129 struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
130
131 if (ucmd->eh_done)
132 complete(ucmd->eh_done);
133
134 scsi_dma_unmap(cmd);
135 scsi_done(cmd);
136 }
137
138 /*
139 * Tell the SCSI layer about a BUS RESET.
140 */
sym_xpt_async_bus_reset(struct sym_hcb * np)141 void sym_xpt_async_bus_reset(struct sym_hcb *np)
142 {
143 printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
144 np->s.settle_time = jiffies + sym_driver_setup.settle_delay * HZ;
145 np->s.settle_time_valid = 1;
146 if (sym_verbose >= 2)
147 printf_info("%s: command processing suspended for %d seconds\n",
148 sym_name(np), sym_driver_setup.settle_delay);
149 }
150
151 /*
152 * Choose the more appropriate CAM status if
153 * the IO encountered an extended error.
154 */
sym_xerr_cam_status(int cam_status,int x_status)155 static int sym_xerr_cam_status(int cam_status, int x_status)
156 {
157 if (x_status) {
158 if (x_status & XE_PARITY_ERR)
159 cam_status = DID_PARITY;
160 else
161 cam_status = DID_ERROR;
162 }
163 return cam_status;
164 }
165
166 /*
167 * Build CAM result for a failed or auto-sensed IO.
168 */
sym_set_cam_result_error(struct sym_hcb * np,struct sym_ccb * cp,int resid)169 void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid)
170 {
171 struct scsi_cmnd *cmd = cp->cmd;
172 u_int cam_status, scsi_status;
173
174 cam_status = DID_OK;
175 scsi_status = cp->ssss_status;
176
177 if (cp->host_flags & HF_SENSE) {
178 scsi_status = cp->sv_scsi_status;
179 resid = cp->sv_resid;
180 if (sym_verbose && cp->sv_xerr_status)
181 sym_print_xerr(cmd, cp->sv_xerr_status);
182 if (cp->host_status == HS_COMPLETE &&
183 cp->ssss_status == S_GOOD &&
184 cp->xerr_status == 0) {
185 cam_status = sym_xerr_cam_status(DID_OK,
186 cp->sv_xerr_status);
187 /*
188 * Bounce back the sense data to user.
189 */
190 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
191 memcpy(cmd->sense_buffer, cp->sns_bbuf,
192 min(SCSI_SENSE_BUFFERSIZE, SYM_SNS_BBUF_LEN));
193 #if 0
194 /*
195 * If the device reports a UNIT ATTENTION condition
196 * due to a RESET condition, we should consider all
197 * disconnect CCBs for this unit as aborted.
198 */
199 if (1) {
200 u_char *p;
201 p = (u_char *) cmd->sense_data;
202 if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
203 sym_clear_tasks(np, DID_ABORT,
204 cp->target,cp->lun, -1);
205 }
206 #endif
207 } else {
208 /*
209 * Error return from our internal request sense. This
210 * is bad: we must clear the contingent allegiance
211 * condition otherwise the device will always return
212 * BUSY. Use a big stick.
213 */
214 sym_reset_scsi_target(np, cmd->device->id);
215 cam_status = DID_ERROR;
216 }
217 } else if (cp->host_status == HS_COMPLETE) /* Bad SCSI status */
218 cam_status = DID_OK;
219 else if (cp->host_status == HS_SEL_TIMEOUT) /* Selection timeout */
220 cam_status = DID_NO_CONNECT;
221 else if (cp->host_status == HS_UNEXPECTED) /* Unexpected BUS FREE*/
222 cam_status = DID_ERROR;
223 else { /* Extended error */
224 if (sym_verbose) {
225 sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
226 cp->host_status, cp->ssss_status,
227 cp->xerr_status);
228 }
229 /*
230 * Set the most appropriate value for CAM status.
231 */
232 cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
233 }
234 scsi_set_resid(cmd, resid);
235 cmd->result = (cam_status << 16) | scsi_status;
236 }
237
sym_scatter(struct sym_hcb * np,struct sym_ccb * cp,struct scsi_cmnd * cmd)238 static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
239 {
240 int segment;
241 int use_sg;
242
243 cp->data_len = 0;
244
245 use_sg = scsi_dma_map(cmd);
246 if (use_sg > 0) {
247 struct scatterlist *sg;
248 struct sym_tcb *tp = &np->target[cp->target];
249 struct sym_tblmove *data;
250
251 if (use_sg > SYM_CONF_MAX_SG) {
252 scsi_dma_unmap(cmd);
253 return -1;
254 }
255
256 data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
257
258 scsi_for_each_sg(cmd, sg, use_sg, segment) {
259 dma_addr_t baddr = sg_dma_address(sg);
260 unsigned int len = sg_dma_len(sg);
261
262 if ((len & 1) && (tp->head.wval & EWS)) {
263 len++;
264 cp->odd_byte_adjustment++;
265 }
266
267 sym_build_sge(np, &data[segment], baddr, len);
268 cp->data_len += len;
269 }
270 } else {
271 segment = -2;
272 }
273
274 return segment;
275 }
276
277 /*
278 * Queue a SCSI command.
279 */
sym_queue_command(struct sym_hcb * np,struct scsi_cmnd * cmd)280 static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd)
281 {
282 struct scsi_device *sdev = cmd->device;
283 struct sym_tcb *tp;
284 struct sym_lcb *lp;
285 struct sym_ccb *cp;
286 int order;
287
288 /*
289 * Retrieve the target descriptor.
290 */
291 tp = &np->target[sdev->id];
292
293 /*
294 * Select tagged/untagged.
295 */
296 lp = sym_lp(tp, sdev->lun);
297 order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
298
299 /*
300 * Queue the SCSI IO.
301 */
302 cp = sym_get_ccb(np, cmd, order);
303 if (!cp)
304 return 1; /* Means resource shortage */
305 sym_queue_scsiio(np, cmd, cp);
306 return 0;
307 }
308
309 /*
310 * Setup buffers and pointers that address the CDB.
311 */
sym_setup_cdb(struct sym_hcb * np,struct scsi_cmnd * cmd,struct sym_ccb * cp)312 static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
313 {
314 memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len);
315
316 cp->phys.cmd.addr = CCB_BA(cp, cdb_buf[0]);
317 cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
318
319 return 0;
320 }
321
322 /*
323 * Setup pointers that address the data and start the I/O.
324 */
sym_setup_data_and_start(struct sym_hcb * np,struct scsi_cmnd * cmd,struct sym_ccb * cp)325 int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
326 {
327 u32 lastp, goalp;
328 int dir;
329
330 /*
331 * Build the CDB.
332 */
333 if (sym_setup_cdb(np, cmd, cp))
334 goto out_abort;
335
336 /*
337 * No direction means no data.
338 */
339 dir = cmd->sc_data_direction;
340 if (dir != DMA_NONE) {
341 cp->segments = sym_scatter(np, cp, cmd);
342 if (cp->segments < 0) {
343 sym_set_cam_status(cmd, DID_ERROR);
344 goto out_abort;
345 }
346
347 /*
348 * No segments means no data.
349 */
350 if (!cp->segments)
351 dir = DMA_NONE;
352 } else {
353 cp->data_len = 0;
354 cp->segments = 0;
355 }
356
357 /*
358 * Set the data pointer.
359 */
360 switch (dir) {
361 case DMA_BIDIRECTIONAL:
362 scmd_printk(KERN_INFO, cmd, "got DMA_BIDIRECTIONAL command");
363 sym_set_cam_status(cmd, DID_ERROR);
364 goto out_abort;
365 case DMA_TO_DEVICE:
366 goalp = SCRIPTA_BA(np, data_out2) + 8;
367 lastp = goalp - 8 - (cp->segments * (2*4));
368 break;
369 case DMA_FROM_DEVICE:
370 cp->host_flags |= HF_DATA_IN;
371 goalp = SCRIPTA_BA(np, data_in2) + 8;
372 lastp = goalp - 8 - (cp->segments * (2*4));
373 break;
374 case DMA_NONE:
375 default:
376 lastp = goalp = SCRIPTB_BA(np, no_data);
377 break;
378 }
379
380 /*
381 * Set all pointers values needed by SCRIPTS.
382 */
383 cp->phys.head.lastp = cpu_to_scr(lastp);
384 cp->phys.head.savep = cpu_to_scr(lastp);
385 cp->startp = cp->phys.head.savep;
386 cp->goalp = cpu_to_scr(goalp);
387
388 /*
389 * When `#ifed 1', the code below makes the driver
390 * panic on the first attempt to write to a SCSI device.
391 * It is the first test we want to do after a driver
392 * change that does not seem obviously safe. :)
393 */
394 #if 0
395 switch (cp->cdb_buf[0]) {
396 case 0x0A: case 0x2A: case 0xAA:
397 panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
398 break;
399 default:
400 break;
401 }
402 #endif
403
404 /*
405 * activate this job.
406 */
407 sym_put_start_queue(np, cp);
408 return 0;
409
410 out_abort:
411 sym_free_ccb(np, cp);
412 sym_xpt_done(np, cmd);
413 return 0;
414 }
415
416
417 /*
418 * timer daemon.
419 *
420 * Misused to keep the driver running when
421 * interrupts are not configured correctly.
422 */
sym_timer(struct sym_hcb * np)423 static void sym_timer(struct sym_hcb *np)
424 {
425 unsigned long thistime = jiffies;
426
427 /*
428 * Restart the timer.
429 */
430 np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
431 add_timer(&np->s.timer);
432
433 /*
434 * If we are resetting the ncr, wait for settle_time before
435 * clearing it. Then command processing will be resumed.
436 */
437 if (np->s.settle_time_valid) {
438 if (time_before_eq(np->s.settle_time, thistime)) {
439 if (sym_verbose >= 2 )
440 printk("%s: command processing resumed\n",
441 sym_name(np));
442 np->s.settle_time_valid = 0;
443 }
444 return;
445 }
446
447 /*
448 * Nothing to do for now, but that may come.
449 */
450 if (np->s.lasttime + 4*HZ < thistime) {
451 np->s.lasttime = thistime;
452 }
453
454 #ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
455 /*
456 * Some way-broken PCI bridges may lead to
457 * completions being lost when the clearing
458 * of the INTFLY flag by the CPU occurs
459 * concurrently with the chip raising this flag.
460 * If this ever happen, lost completions will
461 * be reaped here.
462 */
463 sym_wakeup_done(np);
464 #endif
465 }
466
467
468 /*
469 * PCI BUS error handler.
470 */
sym_log_bus_error(struct Scsi_Host * shost)471 void sym_log_bus_error(struct Scsi_Host *shost)
472 {
473 struct sym_data *sym_data = shost_priv(shost);
474 struct pci_dev *pdev = sym_data->pdev;
475 unsigned short pci_sts;
476 pci_read_config_word(pdev, PCI_STATUS, &pci_sts);
477 if (pci_sts & 0xf900) {
478 pci_write_config_word(pdev, PCI_STATUS, pci_sts);
479 shost_printk(KERN_WARNING, shost,
480 "PCI bus error: status = 0x%04x\n", pci_sts & 0xf900);
481 }
482 }
483
484 /*
485 * queuecommand method. Entered with the host adapter lock held and
486 * interrupts disabled.
487 */
sym53c8xx_queue_command_lck(struct scsi_cmnd * cmd)488 static int sym53c8xx_queue_command_lck(struct scsi_cmnd *cmd)
489 {
490 struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
491 struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
492 int sts = 0;
493
494 memset(ucp, 0, sizeof(*ucp));
495
496 /*
497 * Shorten our settle_time if needed for
498 * this command not to time out.
499 */
500 if (np->s.settle_time_valid && scsi_cmd_to_rq(cmd)->timeout) {
501 unsigned long tlimit = jiffies + scsi_cmd_to_rq(cmd)->timeout;
502 tlimit -= SYM_CONF_TIMER_INTERVAL*2;
503 if (time_after(np->s.settle_time, tlimit)) {
504 np->s.settle_time = tlimit;
505 }
506 }
507
508 if (np->s.settle_time_valid)
509 return SCSI_MLQUEUE_HOST_BUSY;
510
511 sts = sym_queue_command(np, cmd);
512 if (sts)
513 return SCSI_MLQUEUE_HOST_BUSY;
514 return 0;
515 }
516
DEF_SCSI_QCMD(sym53c8xx_queue_command)517 static DEF_SCSI_QCMD(sym53c8xx_queue_command)
518
519 /*
520 * Linux entry point of the interrupt handler.
521 */
522 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id)
523 {
524 struct Scsi_Host *shost = dev_id;
525 struct sym_data *sym_data = shost_priv(shost);
526 irqreturn_t result;
527
528 /* Avoid spinloop trying to handle interrupts on frozen device */
529 if (pci_channel_offline(sym_data->pdev))
530 return IRQ_NONE;
531
532 if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
533
534 spin_lock(shost->host_lock);
535 result = sym_interrupt(shost);
536 spin_unlock(shost->host_lock);
537
538 if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
539
540 return result;
541 }
542
543 /*
544 * Linux entry point of the timer handler
545 */
sym53c8xx_timer(struct timer_list * t)546 static void sym53c8xx_timer(struct timer_list *t)
547 {
548 struct sym_hcb *np = from_timer(np, t, s.timer);
549 unsigned long flags;
550
551 spin_lock_irqsave(np->s.host->host_lock, flags);
552 sym_timer(np);
553 spin_unlock_irqrestore(np->s.host->host_lock, flags);
554 }
555
556
557 /*
558 * What the eh thread wants us to perform.
559 */
560 #define SYM_EH_ABORT 0
561 #define SYM_EH_DEVICE_RESET 1
562
563 /*
564 * Generic method for our eh processing.
565 * The 'op' argument tells what we have to do.
566 */
567 /*
568 * Error handlers called from the eh thread (one thread per HBA).
569 */
sym53c8xx_eh_abort_handler(struct scsi_cmnd * cmd)570 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
571 {
572 struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
573 struct Scsi_Host *shost = cmd->device->host;
574 struct sym_data *sym_data = shost_priv(shost);
575 struct pci_dev *pdev = sym_data->pdev;
576 struct sym_hcb *np = sym_data->ncb;
577 SYM_QUEHEAD *qp;
578 int cmd_queued = 0;
579 int sts = -1;
580 struct completion eh_done;
581
582 scmd_printk(KERN_WARNING, cmd, "ABORT operation started\n");
583
584 /*
585 * Escalate to host reset if the PCI bus went down
586 */
587 if (pci_channel_offline(pdev))
588 return SCSI_FAILED;
589
590 spin_lock_irq(shost->host_lock);
591 /* This one is queued in some place -> to wait for completion */
592 FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
593 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
594 if (cp->cmd == cmd) {
595 cmd_queued = 1;
596 break;
597 }
598 }
599
600 sts = sym_abort_scsiio(np, cmd, 1);
601 /* On error, restore everything and cross fingers :) */
602 if (sts)
603 cmd_queued = 0;
604
605 if (cmd_queued) {
606 init_completion(&eh_done);
607 ucmd->eh_done = &eh_done;
608 spin_unlock_irq(shost->host_lock);
609 if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
610 ucmd->eh_done = NULL;
611 sts = -2;
612 }
613 } else {
614 spin_unlock_irq(shost->host_lock);
615 }
616
617 dev_warn(&cmd->device->sdev_gendev, "ABORT operation %s.\n",
618 sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
619 return sts ? SCSI_FAILED : SCSI_SUCCESS;
620 }
621
sym53c8xx_eh_target_reset_handler(struct scsi_cmnd * cmd)622 static int sym53c8xx_eh_target_reset_handler(struct scsi_cmnd *cmd)
623 {
624 struct scsi_target *starget = scsi_target(cmd->device);
625 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
626 struct sym_data *sym_data = shost_priv(shost);
627 struct pci_dev *pdev = sym_data->pdev;
628 struct sym_hcb *np = sym_data->ncb;
629 SYM_QUEHEAD *qp;
630 int sts;
631 struct completion eh_done;
632
633 starget_printk(KERN_WARNING, starget,
634 "TARGET RESET operation started\n");
635
636 /*
637 * Escalate to host reset if the PCI bus went down
638 */
639 if (pci_channel_offline(pdev))
640 return SCSI_FAILED;
641
642 spin_lock_irq(shost->host_lock);
643 sts = sym_reset_scsi_target(np, starget->id);
644 if (!sts) {
645 FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
646 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb,
647 link_ccbq);
648 struct scsi_cmnd *cmd = cp->cmd;
649 struct sym_ucmd *ucmd;
650
651 if (!cmd || cmd->device->channel != starget->channel ||
652 cmd->device->id != starget->id)
653 continue;
654
655 ucmd = SYM_UCMD_PTR(cmd);
656 init_completion(&eh_done);
657 ucmd->eh_done = &eh_done;
658 spin_unlock_irq(shost->host_lock);
659 if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
660 ucmd->eh_done = NULL;
661 sts = -2;
662 }
663 spin_lock_irq(shost->host_lock);
664 }
665 }
666 spin_unlock_irq(shost->host_lock);
667
668 starget_printk(KERN_WARNING, starget, "TARGET RESET operation %s.\n",
669 sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
670 return SCSI_SUCCESS;
671 }
672
sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd * cmd)673 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
674 {
675 struct Scsi_Host *shost = cmd->device->host;
676 struct sym_data *sym_data = shost_priv(shost);
677 struct pci_dev *pdev = sym_data->pdev;
678 struct sym_hcb *np = sym_data->ncb;
679
680 scmd_printk(KERN_WARNING, cmd, "BUS RESET operation started\n");
681
682 /*
683 * Escalate to host reset if the PCI bus went down
684 */
685 if (pci_channel_offline(pdev))
686 return SCSI_FAILED;
687
688 spin_lock_irq(shost->host_lock);
689 sym_reset_scsi_bus(np, 1);
690 spin_unlock_irq(shost->host_lock);
691
692 dev_warn(&cmd->device->sdev_gendev, "BUS RESET operation complete.\n");
693 return SCSI_SUCCESS;
694 }
695
sym53c8xx_eh_host_reset_handler(struct scsi_cmnd * cmd)696 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
697 {
698 struct Scsi_Host *shost = cmd->device->host;
699 struct sym_data *sym_data = shost_priv(shost);
700 struct pci_dev *pdev = sym_data->pdev;
701 struct sym_hcb *np = sym_data->ncb;
702 struct completion eh_done;
703 int finished_reset = 1;
704
705 shost_printk(KERN_WARNING, shost, "HOST RESET operation started\n");
706
707 /* We may be in an error condition because the PCI bus
708 * went down. In this case, we need to wait until the
709 * PCI bus is reset, the card is reset, and only then
710 * proceed with the scsi error recovery. There's no
711 * point in hurrying; take a leisurely wait.
712 */
713 #define WAIT_FOR_PCI_RECOVERY 35
714 if (pci_channel_offline(pdev)) {
715 init_completion(&eh_done);
716 spin_lock_irq(shost->host_lock);
717 /* Make sure we didn't race */
718 if (pci_channel_offline(pdev)) {
719 BUG_ON(sym_data->io_reset);
720 sym_data->io_reset = &eh_done;
721 finished_reset = 0;
722 }
723 spin_unlock_irq(shost->host_lock);
724 if (!finished_reset)
725 finished_reset = wait_for_completion_timeout
726 (sym_data->io_reset,
727 WAIT_FOR_PCI_RECOVERY*HZ);
728 spin_lock_irq(shost->host_lock);
729 sym_data->io_reset = NULL;
730 spin_unlock_irq(shost->host_lock);
731 }
732
733 if (finished_reset) {
734 sym_reset_scsi_bus(np, 0);
735 sym_start_up(shost, 1);
736 }
737
738 shost_printk(KERN_WARNING, shost, "HOST RESET operation %s.\n",
739 finished_reset==1 ? "complete" : "failed");
740 return finished_reset ? SCSI_SUCCESS : SCSI_FAILED;
741 }
742
743 /*
744 * Tune device queuing depth, according to various limits.
745 */
sym_tune_dev_queuing(struct sym_tcb * tp,int lun,u_short reqtags)746 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
747 {
748 struct sym_lcb *lp = sym_lp(tp, lun);
749 u_short oldtags;
750
751 if (!lp)
752 return;
753
754 oldtags = lp->s.reqtags;
755
756 if (reqtags > lp->s.scdev_depth)
757 reqtags = lp->s.scdev_depth;
758
759 lp->s.reqtags = reqtags;
760
761 if (reqtags != oldtags) {
762 dev_info(&tp->starget->dev,
763 "tagged command queuing %s, command queue depth %d.\n",
764 lp->s.reqtags ? "enabled" : "disabled", reqtags);
765 }
766 }
767
sym53c8xx_sdev_init(struct scsi_device * sdev)768 static int sym53c8xx_sdev_init(struct scsi_device *sdev)
769 {
770 struct sym_hcb *np = sym_get_hcb(sdev->host);
771 struct sym_tcb *tp = &np->target[sdev->id];
772 struct sym_lcb *lp;
773 unsigned long flags;
774 int error;
775
776 if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
777 return -ENXIO;
778
779 spin_lock_irqsave(np->s.host->host_lock, flags);
780
781 /*
782 * Fail the device init if the device is flagged NOSCAN at BOOT in
783 * the NVRAM. This may speed up boot and maintain coherency with
784 * BIOS device numbering. Clearing the flag allows the user to
785 * rescan skipped devices later. We also return an error for
786 * devices not flagged for SCAN LUNS in the NVRAM since some single
787 * lun devices behave badly when asked for a non zero LUN.
788 */
789
790 if (tp->usrflags & SYM_SCAN_BOOT_DISABLED) {
791 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
792 starget_printk(KERN_INFO, sdev->sdev_target,
793 "Scan at boot disabled in NVRAM\n");
794 error = -ENXIO;
795 goto out;
796 }
797
798 if (tp->usrflags & SYM_SCAN_LUNS_DISABLED) {
799 if (sdev->lun != 0) {
800 error = -ENXIO;
801 goto out;
802 }
803 starget_printk(KERN_INFO, sdev->sdev_target,
804 "Multiple LUNs disabled in NVRAM\n");
805 }
806
807 lp = sym_alloc_lcb(np, sdev->id, sdev->lun);
808 if (!lp) {
809 error = -ENOMEM;
810 goto out;
811 }
812 if (tp->nlcb == 1)
813 tp->starget = sdev->sdev_target;
814
815 spi_min_period(tp->starget) = tp->usr_period;
816 spi_max_width(tp->starget) = tp->usr_width;
817
818 error = 0;
819 out:
820 spin_unlock_irqrestore(np->s.host->host_lock, flags);
821
822 return error;
823 }
824
825 /*
826 * Linux entry point for device queue sizing.
827 */
sym53c8xx_sdev_configure(struct scsi_device * sdev,struct queue_limits * lim)828 static int sym53c8xx_sdev_configure(struct scsi_device *sdev,
829 struct queue_limits *lim)
830 {
831 struct sym_hcb *np = sym_get_hcb(sdev->host);
832 struct sym_tcb *tp = &np->target[sdev->id];
833 struct sym_lcb *lp = sym_lp(tp, sdev->lun);
834 int reqtags, depth_to_use;
835
836 /*
837 * Get user flags.
838 */
839 lp->curr_flags = lp->user_flags;
840
841 /*
842 * Select queue depth from driver setup.
843 * Do not use more than configured by user.
844 * Use at least 1.
845 * Do not use more than our maximum.
846 */
847 reqtags = sym_driver_setup.max_tag;
848 if (reqtags > tp->usrtags)
849 reqtags = tp->usrtags;
850 if (!sdev->tagged_supported)
851 reqtags = 0;
852 if (reqtags > SYM_CONF_MAX_TAG)
853 reqtags = SYM_CONF_MAX_TAG;
854 depth_to_use = reqtags ? reqtags : 1;
855 scsi_change_queue_depth(sdev, depth_to_use);
856 lp->s.scdev_depth = depth_to_use;
857 sym_tune_dev_queuing(tp, sdev->lun, reqtags);
858
859 if (!spi_initial_dv(sdev->sdev_target))
860 spi_dv_device(sdev);
861
862 return 0;
863 }
864
sym53c8xx_sdev_destroy(struct scsi_device * sdev)865 static void sym53c8xx_sdev_destroy(struct scsi_device *sdev)
866 {
867 struct sym_hcb *np = sym_get_hcb(sdev->host);
868 struct sym_tcb *tp = &np->target[sdev->id];
869 struct sym_lcb *lp = sym_lp(tp, sdev->lun);
870 unsigned long flags;
871
872 /* if sdev_init returned before allocating a sym_lcb, return */
873 if (!lp)
874 return;
875
876 spin_lock_irqsave(np->s.host->host_lock, flags);
877
878 if (lp->busy_itlq || lp->busy_itl) {
879 /*
880 * This really shouldn't happen, but we can't return an error
881 * so let's try to stop all on-going I/O.
882 */
883 starget_printk(KERN_WARNING, tp->starget,
884 "Removing busy LCB (%d)\n", (u8)sdev->lun);
885 sym_reset_scsi_bus(np, 1);
886 }
887
888 if (sym_free_lcb(np, sdev->id, sdev->lun) == 0) {
889 /*
890 * It was the last unit for this target.
891 */
892 tp->head.sval = 0;
893 tp->head.wval = np->rv_scntl3;
894 tp->head.uval = 0;
895 tp->tgoal.check_nego = 1;
896 tp->starget = NULL;
897 }
898
899 spin_unlock_irqrestore(np->s.host->host_lock, flags);
900 }
901
902 /*
903 * Linux entry point for info() function
904 */
sym53c8xx_info(struct Scsi_Host * host)905 static const char *sym53c8xx_info (struct Scsi_Host *host)
906 {
907 return SYM_DRIVER_NAME;
908 }
909
910
911 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
912 /*
913 * Proc file system stuff
914 *
915 * A read operation returns adapter information.
916 * A write operation is a control command.
917 * The string is parsed in the driver code and the command is passed
918 * to the sym_usercmd() function.
919 */
920
921 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
922
923 struct sym_usrcmd {
924 u_long target;
925 u_long lun;
926 u_long data;
927 u_long cmd;
928 };
929
930 #define UC_SETSYNC 10
931 #define UC_SETTAGS 11
932 #define UC_SETDEBUG 12
933 #define UC_SETWIDE 14
934 #define UC_SETFLAG 15
935 #define UC_SETVERBOSE 17
936 #define UC_RESETDEV 18
937 #define UC_CLEARDEV 19
938
sym_exec_user_command(struct sym_hcb * np,struct sym_usrcmd * uc)939 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
940 {
941 struct sym_tcb *tp;
942 int t, l;
943
944 switch (uc->cmd) {
945 case 0: return;
946
947 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
948 case UC_SETDEBUG:
949 sym_debug_flags = uc->data;
950 break;
951 #endif
952 case UC_SETVERBOSE:
953 np->verbose = uc->data;
954 break;
955 default:
956 /*
957 * We assume that other commands apply to targets.
958 * This should always be the case and avoid the below
959 * 4 lines to be repeated 6 times.
960 */
961 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
962 if (!((uc->target >> t) & 1))
963 continue;
964 tp = &np->target[t];
965 if (!tp->nlcb)
966 continue;
967
968 switch (uc->cmd) {
969
970 case UC_SETSYNC:
971 if (!uc->data || uc->data >= 255) {
972 tp->tgoal.iu = tp->tgoal.dt =
973 tp->tgoal.qas = 0;
974 tp->tgoal.offset = 0;
975 } else if (uc->data <= 9 && np->minsync_dt) {
976 if (uc->data < np->minsync_dt)
977 uc->data = np->minsync_dt;
978 tp->tgoal.iu = tp->tgoal.dt =
979 tp->tgoal.qas = 1;
980 tp->tgoal.width = 1;
981 tp->tgoal.period = uc->data;
982 tp->tgoal.offset = np->maxoffs_dt;
983 } else {
984 if (uc->data < np->minsync)
985 uc->data = np->minsync;
986 tp->tgoal.iu = tp->tgoal.dt =
987 tp->tgoal.qas = 0;
988 tp->tgoal.period = uc->data;
989 tp->tgoal.offset = np->maxoffs;
990 }
991 tp->tgoal.check_nego = 1;
992 break;
993 case UC_SETWIDE:
994 tp->tgoal.width = uc->data ? 1 : 0;
995 tp->tgoal.check_nego = 1;
996 break;
997 case UC_SETTAGS:
998 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
999 sym_tune_dev_queuing(tp, l, uc->data);
1000 break;
1001 case UC_RESETDEV:
1002 tp->to_reset = 1;
1003 np->istat_sem = SEM;
1004 OUTB(np, nc_istat, SIGP|SEM);
1005 break;
1006 case UC_CLEARDEV:
1007 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
1008 struct sym_lcb *lp = sym_lp(tp, l);
1009 if (lp) lp->to_clear = 1;
1010 }
1011 np->istat_sem = SEM;
1012 OUTB(np, nc_istat, SIGP|SEM);
1013 break;
1014 case UC_SETFLAG:
1015 tp->usrflags = uc->data;
1016 break;
1017 }
1018 }
1019 break;
1020 }
1021 }
1022
sym_skip_spaces(char * ptr,int len)1023 static int sym_skip_spaces(char *ptr, int len)
1024 {
1025 int cnt, c;
1026
1027 for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
1028
1029 return (len - cnt);
1030 }
1031
get_int_arg(char * ptr,int len,u_long * pv)1032 static int get_int_arg(char *ptr, int len, u_long *pv)
1033 {
1034 char *end;
1035
1036 *pv = simple_strtoul(ptr, &end, 10);
1037 return (end - ptr);
1038 }
1039
is_keyword(char * ptr,int len,char * verb)1040 static int is_keyword(char *ptr, int len, char *verb)
1041 {
1042 int verb_len = strlen(verb);
1043
1044 if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1045 return verb_len;
1046 else
1047 return 0;
1048 }
1049
1050 #define SKIP_SPACES(ptr, len) \
1051 if ((arg_len = sym_skip_spaces(ptr, len)) < 1) \
1052 return -EINVAL; \
1053 ptr += arg_len; len -= arg_len;
1054
1055 #define GET_INT_ARG(ptr, len, v) \
1056 if (!(arg_len = get_int_arg(ptr, len, &(v)))) \
1057 return -EINVAL; \
1058 ptr += arg_len; len -= arg_len;
1059
1060
1061 /*
1062 * Parse a control command
1063 */
1064
sym_user_command(struct Scsi_Host * shost,char * buffer,int length)1065 static int sym_user_command(struct Scsi_Host *shost, char *buffer, int length)
1066 {
1067 struct sym_hcb *np = sym_get_hcb(shost);
1068 char *ptr = buffer;
1069 int len = length;
1070 struct sym_usrcmd cmd, *uc = &cmd;
1071 int arg_len;
1072 u_long target;
1073
1074 memset(uc, 0, sizeof(*uc));
1075
1076 if (len > 0 && ptr[len-1] == '\n')
1077 --len;
1078
1079 if ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1080 uc->cmd = UC_SETSYNC;
1081 else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1082 uc->cmd = UC_SETTAGS;
1083 else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1084 uc->cmd = UC_SETVERBOSE;
1085 else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1086 uc->cmd = UC_SETWIDE;
1087 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1088 else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1089 uc->cmd = UC_SETDEBUG;
1090 #endif
1091 else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1092 uc->cmd = UC_SETFLAG;
1093 else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1094 uc->cmd = UC_RESETDEV;
1095 else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1096 uc->cmd = UC_CLEARDEV;
1097 else
1098 arg_len = 0;
1099
1100 #ifdef DEBUG_PROC_INFO
1101 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1102 #endif
1103
1104 if (!arg_len)
1105 return -EINVAL;
1106 ptr += arg_len; len -= arg_len;
1107
1108 switch(uc->cmd) {
1109 case UC_SETSYNC:
1110 case UC_SETTAGS:
1111 case UC_SETWIDE:
1112 case UC_SETFLAG:
1113 case UC_RESETDEV:
1114 case UC_CLEARDEV:
1115 SKIP_SPACES(ptr, len);
1116 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1117 ptr += arg_len; len -= arg_len;
1118 uc->target = ~0;
1119 } else {
1120 GET_INT_ARG(ptr, len, target);
1121 uc->target = (1<<target);
1122 #ifdef DEBUG_PROC_INFO
1123 printk("sym_user_command: target=%ld\n", target);
1124 #endif
1125 }
1126 break;
1127 }
1128
1129 switch(uc->cmd) {
1130 case UC_SETVERBOSE:
1131 case UC_SETSYNC:
1132 case UC_SETTAGS:
1133 case UC_SETWIDE:
1134 SKIP_SPACES(ptr, len);
1135 GET_INT_ARG(ptr, len, uc->data);
1136 #ifdef DEBUG_PROC_INFO
1137 printk("sym_user_command: data=%ld\n", uc->data);
1138 #endif
1139 break;
1140 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1141 case UC_SETDEBUG:
1142 while (len > 0) {
1143 SKIP_SPACES(ptr, len);
1144 if ((arg_len = is_keyword(ptr, len, "alloc")))
1145 uc->data |= DEBUG_ALLOC;
1146 else if ((arg_len = is_keyword(ptr, len, "phase")))
1147 uc->data |= DEBUG_PHASE;
1148 else if ((arg_len = is_keyword(ptr, len, "queue")))
1149 uc->data |= DEBUG_QUEUE;
1150 else if ((arg_len = is_keyword(ptr, len, "result")))
1151 uc->data |= DEBUG_RESULT;
1152 else if ((arg_len = is_keyword(ptr, len, "scatter")))
1153 uc->data |= DEBUG_SCATTER;
1154 else if ((arg_len = is_keyword(ptr, len, "script")))
1155 uc->data |= DEBUG_SCRIPT;
1156 else if ((arg_len = is_keyword(ptr, len, "tiny")))
1157 uc->data |= DEBUG_TINY;
1158 else if ((arg_len = is_keyword(ptr, len, "timing")))
1159 uc->data |= DEBUG_TIMING;
1160 else if ((arg_len = is_keyword(ptr, len, "nego")))
1161 uc->data |= DEBUG_NEGO;
1162 else if ((arg_len = is_keyword(ptr, len, "tags")))
1163 uc->data |= DEBUG_TAGS;
1164 else if ((arg_len = is_keyword(ptr, len, "pointer")))
1165 uc->data |= DEBUG_POINTER;
1166 else
1167 return -EINVAL;
1168 ptr += arg_len; len -= arg_len;
1169 }
1170 #ifdef DEBUG_PROC_INFO
1171 printk("sym_user_command: data=%ld\n", uc->data);
1172 #endif
1173 break;
1174 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1175 case UC_SETFLAG:
1176 while (len > 0) {
1177 SKIP_SPACES(ptr, len);
1178 if ((arg_len = is_keyword(ptr, len, "no_disc")))
1179 uc->data &= ~SYM_DISC_ENABLED;
1180 else
1181 return -EINVAL;
1182 ptr += arg_len; len -= arg_len;
1183 }
1184 break;
1185 default:
1186 break;
1187 }
1188
1189 if (len)
1190 return -EINVAL;
1191 else {
1192 unsigned long flags;
1193
1194 spin_lock_irqsave(shost->host_lock, flags);
1195 sym_exec_user_command(np, uc);
1196 spin_unlock_irqrestore(shost->host_lock, flags);
1197 }
1198 return length;
1199 }
1200
1201 #endif /* SYM_LINUX_USER_COMMAND_SUPPORT */
1202
1203
1204 /*
1205 * Copy formatted information into the input buffer.
1206 */
sym_show_info(struct seq_file * m,struct Scsi_Host * shost)1207 static int sym_show_info(struct seq_file *m, struct Scsi_Host *shost)
1208 {
1209 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1210 struct sym_data *sym_data = shost_priv(shost);
1211 struct pci_dev *pdev = sym_data->pdev;
1212 struct sym_hcb *np = sym_data->ncb;
1213
1214 seq_printf(m, "Chip " NAME53C "%s, device id 0x%x, "
1215 "revision id 0x%x\n", np->s.chip_name,
1216 pdev->device, pdev->revision);
1217 seq_printf(m, "At PCI address %s, IRQ %u\n",
1218 pci_name(pdev), pdev->irq);
1219 seq_printf(m, "Min. period factor %d, %s SCSI BUS%s\n",
1220 (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1221 np->maxwide ? "Wide" : "Narrow",
1222 np->minsync_dt ? ", DT capable" : "");
1223
1224 seq_printf(m, "Max. started commands %d, "
1225 "max. commands per LUN %d\n",
1226 SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1227
1228 return 0;
1229 #else
1230 return -EINVAL;
1231 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1232 }
1233
1234 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1235
1236 /*
1237 * Free resources claimed by sym_iomap_device(). Note that
1238 * sym_free_resources() should be used instead of this function after calling
1239 * sym_attach().
1240 */
sym_iounmap_device(struct sym_device * device)1241 static void sym_iounmap_device(struct sym_device *device)
1242 {
1243 if (device->s.ioaddr)
1244 pci_iounmap(device->pdev, device->s.ioaddr);
1245 if (device->s.ramaddr)
1246 pci_iounmap(device->pdev, device->s.ramaddr);
1247 }
1248
1249 /*
1250 * Free controller resources.
1251 */
sym_free_resources(struct sym_hcb * np,struct pci_dev * pdev,int do_free_irq)1252 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev,
1253 int do_free_irq)
1254 {
1255 /*
1256 * Free O/S specific resources.
1257 */
1258 if (do_free_irq)
1259 free_irq(pdev->irq, np->s.host);
1260 if (np->s.ioaddr)
1261 pci_iounmap(pdev, np->s.ioaddr);
1262 if (np->s.ramaddr)
1263 pci_iounmap(pdev, np->s.ramaddr);
1264 /*
1265 * Free O/S independent resources.
1266 */
1267 sym_hcb_free(np);
1268
1269 sym_mfree_dma(np, sizeof(*np), "HCB");
1270 }
1271
1272 /*
1273 * Host attach and initialisations.
1274 *
1275 * Allocate host data and ncb structure.
1276 * Remap MMIO region.
1277 * Do chip initialization.
1278 * If all is OK, install interrupt handling and
1279 * start the timer daemon.
1280 */
sym_attach(const struct scsi_host_template * tpnt,int unit,struct sym_device * dev)1281 static struct Scsi_Host *sym_attach(const struct scsi_host_template *tpnt, int unit,
1282 struct sym_device *dev)
1283 {
1284 struct sym_data *sym_data;
1285 struct sym_hcb *np = NULL;
1286 struct Scsi_Host *shost = NULL;
1287 struct pci_dev *pdev = dev->pdev;
1288 unsigned long flags;
1289 struct sym_fw *fw;
1290 int do_free_irq = 0;
1291
1292 printk(KERN_INFO "sym%d: <%s> rev 0x%x at pci %s irq %u\n",
1293 unit, dev->chip.name, pdev->revision, pci_name(pdev),
1294 pdev->irq);
1295
1296 /*
1297 * Get the firmware for this chip.
1298 */
1299 fw = sym_find_firmware(&dev->chip);
1300 if (!fw)
1301 goto attach_failed;
1302
1303 shost = scsi_host_alloc(tpnt, sizeof(*sym_data));
1304 if (!shost)
1305 goto attach_failed;
1306 sym_data = shost_priv(shost);
1307
1308 /*
1309 * Allocate immediately the host control block,
1310 * since we are only expecting to succeed. :)
1311 * We keep track in the HCB of all the resources that
1312 * are to be released on error.
1313 */
1314 np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1315 if (!np)
1316 goto attach_failed;
1317 np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1318 sym_data->ncb = np;
1319 sym_data->pdev = pdev;
1320 np->s.host = shost;
1321
1322 pci_set_drvdata(pdev, shost);
1323
1324 /*
1325 * Copy some useful infos to the HCB.
1326 */
1327 np->hcb_ba = vtobus(np);
1328 np->verbose = sym_driver_setup.verbose;
1329 np->s.unit = unit;
1330 np->features = dev->chip.features;
1331 np->clock_divn = dev->chip.nr_divisor;
1332 np->maxoffs = dev->chip.offset_max;
1333 np->maxburst = dev->chip.burst_max;
1334 np->myaddr = dev->host_id;
1335 np->mmio_ba = (u32)dev->mmio_base;
1336 np->ram_ba = (u32)dev->ram_base;
1337 np->s.ioaddr = dev->s.ioaddr;
1338 np->s.ramaddr = dev->s.ramaddr;
1339
1340 /*
1341 * Edit its name.
1342 */
1343 strscpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1344 sprintf(np->s.inst_name, "sym%d", np->s.unit);
1345
1346 if ((SYM_CONF_DMA_ADDRESSING_MODE > 0) && (np->features & FE_DAC) &&
1347 !dma_set_mask(&pdev->dev, DMA_DAC_MASK)) {
1348 set_dac(np);
1349 } else if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
1350 printf_warning("%s: No suitable DMA available\n", sym_name(np));
1351 goto attach_failed;
1352 }
1353
1354 if (sym_hcb_attach(shost, fw, dev->nvram))
1355 goto attach_failed;
1356
1357 /*
1358 * Install the interrupt handler.
1359 * If we synchonize the C code with SCRIPTS on interrupt,
1360 * we do not want to share the INTR line at all.
1361 */
1362 if (request_irq(pdev->irq, sym53c8xx_intr, IRQF_SHARED, NAME53C8XX,
1363 shost)) {
1364 printf_err("%s: request irq %u failure\n",
1365 sym_name(np), pdev->irq);
1366 goto attach_failed;
1367 }
1368 do_free_irq = 1;
1369
1370 /*
1371 * After SCSI devices have been opened, we cannot
1372 * reset the bus safely, so we do it here.
1373 */
1374 spin_lock_irqsave(shost->host_lock, flags);
1375 if (sym_reset_scsi_bus(np, 0))
1376 goto reset_failed;
1377
1378 /*
1379 * Start the SCRIPTS.
1380 */
1381 sym_start_up(shost, 1);
1382
1383 /*
1384 * Start the timer daemon
1385 */
1386 timer_setup(&np->s.timer, sym53c8xx_timer, 0);
1387 np->s.lasttime=0;
1388 sym_timer (np);
1389
1390 /*
1391 * Fill Linux host instance structure
1392 * and return success.
1393 */
1394 shost->max_channel = 0;
1395 shost->this_id = np->myaddr;
1396 shost->max_id = np->maxwide ? 16 : 8;
1397 shost->max_lun = SYM_CONF_MAX_LUN;
1398 shost->unique_id = pci_resource_start(pdev, 0);
1399 shost->cmd_per_lun = SYM_CONF_MAX_TAG;
1400 shost->can_queue = (SYM_CONF_MAX_START-2);
1401 shost->sg_tablesize = SYM_CONF_MAX_SG;
1402 shost->max_cmd_len = 16;
1403 BUG_ON(sym2_transport_template == NULL);
1404 shost->transportt = sym2_transport_template;
1405
1406 /* 53c896 rev 1 errata: DMA may not cross 16MB boundary */
1407 if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 2)
1408 shost->dma_boundary = 0xFFFFFF;
1409
1410 spin_unlock_irqrestore(shost->host_lock, flags);
1411
1412 return shost;
1413
1414 reset_failed:
1415 printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1416 "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1417 spin_unlock_irqrestore(shost->host_lock, flags);
1418 attach_failed:
1419 printf_info("sym%d: giving up ...\n", unit);
1420 if (np)
1421 sym_free_resources(np, pdev, do_free_irq);
1422 else
1423 sym_iounmap_device(dev);
1424 if (shost)
1425 scsi_host_put(shost);
1426
1427 return NULL;
1428 }
1429
1430
1431 /*
1432 * Detect and try to read SYMBIOS and TEKRAM NVRAM.
1433 */
1434 #if SYM_CONF_NVRAM_SUPPORT
sym_get_nvram(struct sym_device * devp,struct sym_nvram * nvp)1435 static void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1436 {
1437 devp->nvram = nvp;
1438 nvp->type = 0;
1439
1440 sym_read_nvram(devp, nvp);
1441 }
1442 #else
sym_get_nvram(struct sym_device * devp,struct sym_nvram * nvp)1443 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1444 {
1445 }
1446 #endif /* SYM_CONF_NVRAM_SUPPORT */
1447
sym_check_supported(struct sym_device * device)1448 static int sym_check_supported(struct sym_device *device)
1449 {
1450 struct sym_chip *chip;
1451 struct pci_dev *pdev = device->pdev;
1452 unsigned long io_port = pci_resource_start(pdev, 0);
1453 int i;
1454
1455 /*
1456 * If user excluded this chip, do not initialize it.
1457 * I hate this code so much. Must kill it.
1458 */
1459 if (io_port) {
1460 for (i = 0 ; i < 8 ; i++) {
1461 if (sym_driver_setup.excludes[i] == io_port)
1462 return -ENODEV;
1463 }
1464 }
1465
1466 /*
1467 * Check if the chip is supported. Then copy the chip description
1468 * to our device structure so we can make it match the actual device
1469 * and options.
1470 */
1471 chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1472 if (!chip) {
1473 dev_info(&pdev->dev, "device not supported\n");
1474 return -ENODEV;
1475 }
1476 memcpy(&device->chip, chip, sizeof(device->chip));
1477
1478 return 0;
1479 }
1480
1481 /*
1482 * Ignore Symbios chips controlled by various RAID controllers.
1483 * These controllers set value 0x52414944 at RAM end - 16.
1484 */
sym_check_raid(struct sym_device * device)1485 static int sym_check_raid(struct sym_device *device)
1486 {
1487 unsigned int ram_size, ram_val;
1488
1489 if (!device->s.ramaddr)
1490 return 0;
1491
1492 if (device->chip.features & FE_RAM8K)
1493 ram_size = 8192;
1494 else
1495 ram_size = 4096;
1496
1497 ram_val = readl(device->s.ramaddr + ram_size - 16);
1498 if (ram_val != 0x52414944)
1499 return 0;
1500
1501 dev_info(&device->pdev->dev,
1502 "not initializing, driven by RAID controller.\n");
1503 return -ENODEV;
1504 }
1505
sym_set_workarounds(struct sym_device * device)1506 static int sym_set_workarounds(struct sym_device *device)
1507 {
1508 struct sym_chip *chip = &device->chip;
1509 struct pci_dev *pdev = device->pdev;
1510 u_short status_reg;
1511
1512 /*
1513 * (ITEM 12 of a DEL about the 896 I haven't yet).
1514 * We must ensure the chip will use WRITE AND INVALIDATE.
1515 * The revision number limit is for now arbitrary.
1516 */
1517 if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 0x4) {
1518 chip->features |= (FE_WRIE | FE_CLSE);
1519 }
1520
1521 /* If the chip can do Memory Write Invalidate, enable it */
1522 if (chip->features & FE_WRIE) {
1523 if (pci_set_mwi(pdev))
1524 return -ENODEV;
1525 }
1526
1527 /*
1528 * Work around for errant bit in 895A. The 66Mhz
1529 * capable bit is set erroneously. Clear this bit.
1530 * (Item 1 DEL 533)
1531 *
1532 * Make sure Config space and Features agree.
1533 *
1534 * Recall: writes are not normal to status register -
1535 * write a 1 to clear and a 0 to leave unchanged.
1536 * Can only reset bits.
1537 */
1538 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1539 if (chip->features & FE_66MHZ) {
1540 if (!(status_reg & PCI_STATUS_66MHZ))
1541 chip->features &= ~FE_66MHZ;
1542 } else {
1543 if (status_reg & PCI_STATUS_66MHZ) {
1544 status_reg = PCI_STATUS_66MHZ;
1545 pci_write_config_word(pdev, PCI_STATUS, status_reg);
1546 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1547 }
1548 }
1549
1550 return 0;
1551 }
1552
1553 /*
1554 * Map HBA registers and on-chip SRAM (if present).
1555 */
sym_iomap_device(struct sym_device * device)1556 static int sym_iomap_device(struct sym_device *device)
1557 {
1558 struct pci_dev *pdev = device->pdev;
1559 struct pci_bus_region bus_addr;
1560 int i = 2;
1561
1562 pcibios_resource_to_bus(pdev->bus, &bus_addr, &pdev->resource[1]);
1563 device->mmio_base = bus_addr.start;
1564
1565 if (device->chip.features & FE_RAM) {
1566 /*
1567 * If the BAR is 64-bit, resource 2 will be occupied by the
1568 * upper 32 bits
1569 */
1570 if (!pdev->resource[i].flags)
1571 i++;
1572 pcibios_resource_to_bus(pdev->bus, &bus_addr,
1573 &pdev->resource[i]);
1574 device->ram_base = bus_addr.start;
1575 }
1576
1577 #ifdef CONFIG_SCSI_SYM53C8XX_MMIO
1578 if (device->mmio_base)
1579 device->s.ioaddr = pci_iomap(pdev, 1,
1580 pci_resource_len(pdev, 1));
1581 #endif
1582 if (!device->s.ioaddr)
1583 device->s.ioaddr = pci_iomap(pdev, 0,
1584 pci_resource_len(pdev, 0));
1585 if (!device->s.ioaddr) {
1586 dev_err(&pdev->dev, "could not map registers; giving up.\n");
1587 return -EIO;
1588 }
1589 if (device->ram_base) {
1590 device->s.ramaddr = pci_iomap(pdev, i,
1591 pci_resource_len(pdev, i));
1592 if (!device->s.ramaddr) {
1593 dev_warn(&pdev->dev,
1594 "could not map SRAM; continuing anyway.\n");
1595 device->ram_base = 0;
1596 }
1597 }
1598
1599 return 0;
1600 }
1601
1602 /*
1603 * The NCR PQS and PDS cards are constructed as a DEC bridge
1604 * behind which sits a proprietary NCR memory controller and
1605 * either four or two 53c875s as separate devices. We can tell
1606 * if an 875 is part of a PQS/PDS or not since if it is, it will
1607 * be on the same bus as the memory controller. In its usual
1608 * mode of operation, the 875s are slaved to the memory
1609 * controller for all transfers. To operate with the Linux
1610 * driver, the memory controller is disabled and the 875s
1611 * freed to function independently. The only wrinkle is that
1612 * the preset SCSI ID (which may be zero) must be read in from
1613 * a special configuration space register of the 875.
1614 */
sym_config_pqs(struct pci_dev * pdev,struct sym_device * sym_dev)1615 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1616 {
1617 int slot;
1618 u8 tmp;
1619
1620 for (slot = 0; slot < 256; slot++) {
1621 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1622
1623 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1624 pci_dev_put(memc);
1625 continue;
1626 }
1627
1628 /* bit 1: allow individual 875 configuration */
1629 pci_read_config_byte(memc, 0x44, &tmp);
1630 if ((tmp & 0x2) == 0) {
1631 tmp |= 0x2;
1632 pci_write_config_byte(memc, 0x44, tmp);
1633 }
1634
1635 /* bit 2: drive individual 875 interrupts to the bus */
1636 pci_read_config_byte(memc, 0x45, &tmp);
1637 if ((tmp & 0x4) == 0) {
1638 tmp |= 0x4;
1639 pci_write_config_byte(memc, 0x45, tmp);
1640 }
1641
1642 pci_dev_put(memc);
1643 break;
1644 }
1645
1646 pci_read_config_byte(pdev, 0x84, &tmp);
1647 sym_dev->host_id = tmp;
1648 }
1649
1650 /*
1651 * Called before unloading the module.
1652 * Detach the host.
1653 * We have to free resources and halt the NCR chip.
1654 */
sym_detach(struct Scsi_Host * shost,struct pci_dev * pdev)1655 static int sym_detach(struct Scsi_Host *shost, struct pci_dev *pdev)
1656 {
1657 struct sym_hcb *np = sym_get_hcb(shost);
1658 printk("%s: detaching ...\n", sym_name(np));
1659
1660 del_timer_sync(&np->s.timer);
1661
1662 /*
1663 * Reset NCR chip.
1664 * We should use sym_soft_reset(), but we don't want to do
1665 * so, since we may not be safe if interrupts occur.
1666 */
1667 printk("%s: resetting chip\n", sym_name(np));
1668 OUTB(np, nc_istat, SRST);
1669 INB(np, nc_mbox1);
1670 udelay(10);
1671 OUTB(np, nc_istat, 0);
1672
1673 sym_free_resources(np, pdev, 1);
1674 scsi_host_put(shost);
1675
1676 return 1;
1677 }
1678
1679 /*
1680 * Driver host template.
1681 */
1682 static const struct scsi_host_template sym2_template = {
1683 .module = THIS_MODULE,
1684 .name = "sym53c8xx",
1685 .info = sym53c8xx_info,
1686 .cmd_size = sizeof(struct sym_ucmd),
1687 .queuecommand = sym53c8xx_queue_command,
1688 .sdev_init = sym53c8xx_sdev_init,
1689 .sdev_configure = sym53c8xx_sdev_configure,
1690 .sdev_destroy = sym53c8xx_sdev_destroy,
1691 .eh_abort_handler = sym53c8xx_eh_abort_handler,
1692 .eh_target_reset_handler = sym53c8xx_eh_target_reset_handler,
1693 .eh_bus_reset_handler = sym53c8xx_eh_bus_reset_handler,
1694 .eh_host_reset_handler = sym53c8xx_eh_host_reset_handler,
1695 .this_id = 7,
1696 .max_sectors = 0xFFFF,
1697 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1698 .show_info = sym_show_info,
1699 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1700 .write_info = sym_user_command,
1701 #endif
1702 .proc_name = NAME53C8XX,
1703 #endif
1704 };
1705
1706 static int attach_count;
1707
sym2_probe(struct pci_dev * pdev,const struct pci_device_id * ent)1708 static int sym2_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1709 {
1710 struct sym_device sym_dev;
1711 struct sym_nvram nvram;
1712 struct Scsi_Host *shost;
1713 int do_iounmap = 0;
1714 int do_disable_device = 1;
1715
1716 memset(&sym_dev, 0, sizeof(sym_dev));
1717 memset(&nvram, 0, sizeof(nvram));
1718 sym_dev.pdev = pdev;
1719 sym_dev.host_id = SYM_SETUP_HOST_ID;
1720
1721 if (pci_enable_device(pdev))
1722 goto leave;
1723
1724 pci_set_master(pdev);
1725
1726 if (pci_request_regions(pdev, NAME53C8XX))
1727 goto disable;
1728
1729 if (sym_check_supported(&sym_dev))
1730 goto free;
1731
1732 if (sym_iomap_device(&sym_dev))
1733 goto free;
1734 do_iounmap = 1;
1735
1736 if (sym_check_raid(&sym_dev)) {
1737 do_disable_device = 0; /* Don't disable the device */
1738 goto free;
1739 }
1740
1741 if (sym_set_workarounds(&sym_dev))
1742 goto free;
1743
1744 sym_config_pqs(pdev, &sym_dev);
1745
1746 sym_get_nvram(&sym_dev, &nvram);
1747
1748 do_iounmap = 0; /* Don't sym_iounmap_device() after sym_attach(). */
1749 shost = sym_attach(&sym2_template, attach_count, &sym_dev);
1750 if (!shost)
1751 goto free;
1752
1753 if (scsi_add_host(shost, &pdev->dev))
1754 goto detach;
1755 scsi_scan_host(shost);
1756
1757 attach_count++;
1758
1759 return 0;
1760
1761 detach:
1762 sym_detach(pci_get_drvdata(pdev), pdev);
1763 free:
1764 if (do_iounmap)
1765 sym_iounmap_device(&sym_dev);
1766 pci_release_regions(pdev);
1767 disable:
1768 if (do_disable_device)
1769 pci_disable_device(pdev);
1770 leave:
1771 return -ENODEV;
1772 }
1773
sym2_remove(struct pci_dev * pdev)1774 static void sym2_remove(struct pci_dev *pdev)
1775 {
1776 struct Scsi_Host *shost = pci_get_drvdata(pdev);
1777
1778 scsi_remove_host(shost);
1779 sym_detach(shost, pdev);
1780 pci_release_regions(pdev);
1781 pci_disable_device(pdev);
1782
1783 attach_count--;
1784 }
1785
1786 /**
1787 * sym2_io_error_detected() - called when PCI error is detected
1788 * @pdev: pointer to PCI device
1789 * @state: current state of the PCI slot
1790 */
sym2_io_error_detected(struct pci_dev * pdev,pci_channel_state_t state)1791 static pci_ers_result_t sym2_io_error_detected(struct pci_dev *pdev,
1792 pci_channel_state_t state)
1793 {
1794 /* If slot is permanently frozen, turn everything off */
1795 if (state == pci_channel_io_perm_failure) {
1796 sym2_remove(pdev);
1797 return PCI_ERS_RESULT_DISCONNECT;
1798 }
1799
1800 disable_irq(pdev->irq);
1801 pci_disable_device(pdev);
1802
1803 /* Request that MMIO be enabled, so register dump can be taken. */
1804 return PCI_ERS_RESULT_CAN_RECOVER;
1805 }
1806
1807 /**
1808 * sym2_io_slot_dump - Enable MMIO and dump debug registers
1809 * @pdev: pointer to PCI device
1810 */
sym2_io_slot_dump(struct pci_dev * pdev)1811 static pci_ers_result_t sym2_io_slot_dump(struct pci_dev *pdev)
1812 {
1813 struct Scsi_Host *shost = pci_get_drvdata(pdev);
1814
1815 sym_dump_registers(shost);
1816
1817 /* Request a slot reset. */
1818 return PCI_ERS_RESULT_NEED_RESET;
1819 }
1820
1821 /**
1822 * sym2_reset_workarounds - hardware-specific work-arounds
1823 * @pdev: pointer to PCI device
1824 *
1825 * This routine is similar to sym_set_workarounds(), except
1826 * that, at this point, we already know that the device was
1827 * successfully initialized at least once before, and so most
1828 * of the steps taken there are un-needed here.
1829 */
sym2_reset_workarounds(struct pci_dev * pdev)1830 static void sym2_reset_workarounds(struct pci_dev *pdev)
1831 {
1832 u_short status_reg;
1833 struct sym_chip *chip;
1834
1835 chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1836
1837 /* Work around for errant bit in 895A, in a fashion
1838 * similar to what is done in sym_set_workarounds().
1839 */
1840 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1841 if (!(chip->features & FE_66MHZ) && (status_reg & PCI_STATUS_66MHZ)) {
1842 status_reg = PCI_STATUS_66MHZ;
1843 pci_write_config_word(pdev, PCI_STATUS, status_reg);
1844 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1845 }
1846 }
1847
1848 /**
1849 * sym2_io_slot_reset() - called when the pci bus has been reset.
1850 * @pdev: pointer to PCI device
1851 *
1852 * Restart the card from scratch.
1853 */
sym2_io_slot_reset(struct pci_dev * pdev)1854 static pci_ers_result_t sym2_io_slot_reset(struct pci_dev *pdev)
1855 {
1856 struct Scsi_Host *shost = pci_get_drvdata(pdev);
1857 struct sym_hcb *np = sym_get_hcb(shost);
1858
1859 printk(KERN_INFO "%s: recovering from a PCI slot reset\n",
1860 sym_name(np));
1861
1862 if (pci_enable_device(pdev)) {
1863 printk(KERN_ERR "%s: Unable to enable after PCI reset\n",
1864 sym_name(np));
1865 return PCI_ERS_RESULT_DISCONNECT;
1866 }
1867
1868 pci_set_master(pdev);
1869 enable_irq(pdev->irq);
1870
1871 /* If the chip can do Memory Write Invalidate, enable it */
1872 if (np->features & FE_WRIE) {
1873 if (pci_set_mwi(pdev))
1874 return PCI_ERS_RESULT_DISCONNECT;
1875 }
1876
1877 /* Perform work-arounds, analogous to sym_set_workarounds() */
1878 sym2_reset_workarounds(pdev);
1879
1880 /* Perform host reset only on one instance of the card */
1881 if (PCI_FUNC(pdev->devfn) == 0) {
1882 if (sym_reset_scsi_bus(np, 0)) {
1883 printk(KERN_ERR "%s: Unable to reset scsi host\n",
1884 sym_name(np));
1885 return PCI_ERS_RESULT_DISCONNECT;
1886 }
1887 sym_start_up(shost, 1);
1888 }
1889
1890 return PCI_ERS_RESULT_RECOVERED;
1891 }
1892
1893 /**
1894 * sym2_io_resume() - resume normal ops after PCI reset
1895 * @pdev: pointer to PCI device
1896 *
1897 * Called when the error recovery driver tells us that its
1898 * OK to resume normal operation. Use completion to allow
1899 * halted scsi ops to resume.
1900 */
sym2_io_resume(struct pci_dev * pdev)1901 static void sym2_io_resume(struct pci_dev *pdev)
1902 {
1903 struct Scsi_Host *shost = pci_get_drvdata(pdev);
1904 struct sym_data *sym_data = shost_priv(shost);
1905
1906 spin_lock_irq(shost->host_lock);
1907 if (sym_data->io_reset)
1908 complete(sym_data->io_reset);
1909 spin_unlock_irq(shost->host_lock);
1910 }
1911
sym2_get_signalling(struct Scsi_Host * shost)1912 static void sym2_get_signalling(struct Scsi_Host *shost)
1913 {
1914 struct sym_hcb *np = sym_get_hcb(shost);
1915 enum spi_signal_type type;
1916
1917 switch (np->scsi_mode) {
1918 case SMODE_SE:
1919 type = SPI_SIGNAL_SE;
1920 break;
1921 case SMODE_LVD:
1922 type = SPI_SIGNAL_LVD;
1923 break;
1924 case SMODE_HVD:
1925 type = SPI_SIGNAL_HVD;
1926 break;
1927 default:
1928 type = SPI_SIGNAL_UNKNOWN;
1929 break;
1930 }
1931 spi_signalling(shost) = type;
1932 }
1933
sym2_set_offset(struct scsi_target * starget,int offset)1934 static void sym2_set_offset(struct scsi_target *starget, int offset)
1935 {
1936 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1937 struct sym_hcb *np = sym_get_hcb(shost);
1938 struct sym_tcb *tp = &np->target[starget->id];
1939
1940 tp->tgoal.offset = offset;
1941 tp->tgoal.check_nego = 1;
1942 }
1943
sym2_set_period(struct scsi_target * starget,int period)1944 static void sym2_set_period(struct scsi_target *starget, int period)
1945 {
1946 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1947 struct sym_hcb *np = sym_get_hcb(shost);
1948 struct sym_tcb *tp = &np->target[starget->id];
1949
1950 /* have to have DT for these transfers, but DT will also
1951 * set width, so check that this is allowed */
1952 if (period <= np->minsync && spi_width(starget))
1953 tp->tgoal.dt = 1;
1954
1955 tp->tgoal.period = period;
1956 tp->tgoal.check_nego = 1;
1957 }
1958
sym2_set_width(struct scsi_target * starget,int width)1959 static void sym2_set_width(struct scsi_target *starget, int width)
1960 {
1961 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1962 struct sym_hcb *np = sym_get_hcb(shost);
1963 struct sym_tcb *tp = &np->target[starget->id];
1964
1965 /* It is illegal to have DT set on narrow transfers. If DT is
1966 * clear, we must also clear IU and QAS. */
1967 if (width == 0)
1968 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1969
1970 tp->tgoal.width = width;
1971 tp->tgoal.check_nego = 1;
1972 }
1973
sym2_set_dt(struct scsi_target * starget,int dt)1974 static void sym2_set_dt(struct scsi_target *starget, int dt)
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 /* We must clear QAS and IU if DT is clear */
1981 if (dt)
1982 tp->tgoal.dt = 1;
1983 else
1984 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1985 tp->tgoal.check_nego = 1;
1986 }
1987
1988 #if 0
1989 static void sym2_set_iu(struct scsi_target *starget, int iu)
1990 {
1991 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1992 struct sym_hcb *np = sym_get_hcb(shost);
1993 struct sym_tcb *tp = &np->target[starget->id];
1994
1995 if (iu)
1996 tp->tgoal.iu = tp->tgoal.dt = 1;
1997 else
1998 tp->tgoal.iu = 0;
1999 tp->tgoal.check_nego = 1;
2000 }
2001
2002 static void sym2_set_qas(struct scsi_target *starget, int qas)
2003 {
2004 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2005 struct sym_hcb *np = sym_get_hcb(shost);
2006 struct sym_tcb *tp = &np->target[starget->id];
2007
2008 if (qas)
2009 tp->tgoal.dt = tp->tgoal.qas = 1;
2010 else
2011 tp->tgoal.qas = 0;
2012 tp->tgoal.check_nego = 1;
2013 }
2014 #endif
2015
2016 static struct spi_function_template sym2_transport_functions = {
2017 .set_offset = sym2_set_offset,
2018 .show_offset = 1,
2019 .set_period = sym2_set_period,
2020 .show_period = 1,
2021 .set_width = sym2_set_width,
2022 .show_width = 1,
2023 .set_dt = sym2_set_dt,
2024 .show_dt = 1,
2025 #if 0
2026 .set_iu = sym2_set_iu,
2027 .show_iu = 1,
2028 .set_qas = sym2_set_qas,
2029 .show_qas = 1,
2030 #endif
2031 .get_signalling = sym2_get_signalling,
2032 };
2033
2034 static const struct pci_device_id sym2_id_table[] = {
2035 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2036 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2037 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2038 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2039 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2040 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2041 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2042 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2043 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2044 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2045 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2046 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2047 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2048 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8, 0xffff00, 0UL },
2049 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2050 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2051 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2052 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2053 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2054 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2055 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2056 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2057 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2058 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8, 0xffff00, 0UL }, /* new */
2059 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2060 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2061 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2062 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2063 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2064 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2065 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2066 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2067 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2068 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2069 { 0, }
2070 };
2071
2072 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2073
2074 static const struct pci_error_handlers sym2_err_handler = {
2075 .error_detected = sym2_io_error_detected,
2076 .mmio_enabled = sym2_io_slot_dump,
2077 .slot_reset = sym2_io_slot_reset,
2078 .resume = sym2_io_resume,
2079 };
2080
2081 static struct pci_driver sym2_driver = {
2082 .name = NAME53C8XX,
2083 .id_table = sym2_id_table,
2084 .probe = sym2_probe,
2085 .remove = sym2_remove,
2086 .err_handler = &sym2_err_handler,
2087 };
2088
sym2_init(void)2089 static int __init sym2_init(void)
2090 {
2091 int error;
2092
2093 sym2_setup_params();
2094 sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2095 if (!sym2_transport_template)
2096 return -ENODEV;
2097
2098 error = pci_register_driver(&sym2_driver);
2099 if (error)
2100 spi_release_transport(sym2_transport_template);
2101 return error;
2102 }
2103
sym2_exit(void)2104 static void __exit sym2_exit(void)
2105 {
2106 pci_unregister_driver(&sym2_driver);
2107 spi_release_transport(sym2_transport_template);
2108 }
2109
2110 module_init(sym2_init);
2111 module_exit(sym2_exit);
2112