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 *)(&(cmd)->SCp))
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 BUILD_BUG_ON(sizeof(struct scsi_pointer) < sizeof(struct sym_ucmd));
131
132 if (ucmd->eh_done)
133 complete(ucmd->eh_done);
134
135 scsi_dma_unmap(cmd);
136 cmd->scsi_done(cmd);
137 }
138
139 /*
140 * Tell the SCSI layer about a BUS RESET.
141 */
sym_xpt_async_bus_reset(struct sym_hcb * np)142 void sym_xpt_async_bus_reset(struct sym_hcb *np)
143 {
144 printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
145 np->s.settle_time = jiffies + sym_driver_setup.settle_delay * HZ;
146 np->s.settle_time_valid = 1;
147 if (sym_verbose >= 2)
148 printf_info("%s: command processing suspended for %d seconds\n",
149 sym_name(np), sym_driver_setup.settle_delay);
150 }
151
152 /*
153 * Choose the more appropriate CAM status if
154 * the IO encountered an extended error.
155 */
sym_xerr_cam_status(int cam_status,int x_status)156 static int sym_xerr_cam_status(int cam_status, int x_status)
157 {
158 if (x_status) {
159 if (x_status & XE_PARITY_ERR)
160 cam_status = DID_PARITY;
161 else
162 cam_status = DID_ERROR;
163 }
164 return cam_status;
165 }
166
167 /*
168 * Build CAM result for a failed or auto-sensed IO.
169 */
sym_set_cam_result_error(struct sym_hcb * np,struct sym_ccb * cp,int resid)170 void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid)
171 {
172 struct scsi_cmnd *cmd = cp->cmd;
173 u_int cam_status, scsi_status;
174
175 cam_status = DID_OK;
176 scsi_status = cp->ssss_status;
177
178 if (cp->host_flags & HF_SENSE) {
179 scsi_status = cp->sv_scsi_status;
180 resid = cp->sv_resid;
181 if (sym_verbose && cp->sv_xerr_status)
182 sym_print_xerr(cmd, cp->sv_xerr_status);
183 if (cp->host_status == HS_COMPLETE &&
184 cp->ssss_status == S_GOOD &&
185 cp->xerr_status == 0) {
186 cam_status = sym_xerr_cam_status(DID_OK,
187 cp->sv_xerr_status);
188 /*
189 * Bounce back the sense data to user.
190 */
191 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
192 memcpy(cmd->sense_buffer, cp->sns_bbuf,
193 min(SCSI_SENSE_BUFFERSIZE, SYM_SNS_BBUF_LEN));
194 #if 0
195 /*
196 * If the device reports a UNIT ATTENTION condition
197 * due to a RESET condition, we should consider all
198 * disconnect CCBs for this unit as aborted.
199 */
200 if (1) {
201 u_char *p;
202 p = (u_char *) cmd->sense_data;
203 if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
204 sym_clear_tasks(np, DID_ABORT,
205 cp->target,cp->lun, -1);
206 }
207 #endif
208 } else {
209 /*
210 * Error return from our internal request sense. This
211 * is bad: we must clear the contingent allegiance
212 * condition otherwise the device will always return
213 * BUSY. Use a big stick.
214 */
215 sym_reset_scsi_target(np, cmd->device->id);
216 cam_status = DID_ERROR;
217 }
218 } else if (cp->host_status == HS_COMPLETE) /* Bad SCSI status */
219 cam_status = DID_OK;
220 else if (cp->host_status == HS_SEL_TIMEOUT) /* Selection timeout */
221 cam_status = DID_NO_CONNECT;
222 else if (cp->host_status == HS_UNEXPECTED) /* Unexpected BUS FREE*/
223 cam_status = DID_ERROR;
224 else { /* Extended error */
225 if (sym_verbose) {
226 sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
227 cp->host_status, cp->ssss_status,
228 cp->xerr_status);
229 }
230 /*
231 * Set the most appropriate value for CAM status.
232 */
233 cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
234 }
235 scsi_set_resid(cmd, resid);
236 cmd->result = (cam_status << 16) | scsi_status;
237 }
238
sym_scatter(struct sym_hcb * np,struct sym_ccb * cp,struct scsi_cmnd * cmd)239 static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
240 {
241 int segment;
242 int use_sg;
243
244 cp->data_len = 0;
245
246 use_sg = scsi_dma_map(cmd);
247 if (use_sg > 0) {
248 struct scatterlist *sg;
249 struct sym_tcb *tp = &np->target[cp->target];
250 struct sym_tblmove *data;
251
252 if (use_sg > SYM_CONF_MAX_SG) {
253 scsi_dma_unmap(cmd);
254 return -1;
255 }
256
257 data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
258
259 scsi_for_each_sg(cmd, sg, use_sg, segment) {
260 dma_addr_t baddr = sg_dma_address(sg);
261 unsigned int len = sg_dma_len(sg);
262
263 if ((len & 1) && (tp->head.wval & EWS)) {
264 len++;
265 cp->odd_byte_adjustment++;
266 }
267
268 sym_build_sge(np, &data[segment], baddr, len);
269 cp->data_len += len;
270 }
271 } else {
272 segment = -2;
273 }
274
275 return segment;
276 }
277
278 /*
279 * Queue a SCSI command.
280 */
sym_queue_command(struct sym_hcb * np,struct scsi_cmnd * cmd)281 static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd)
282 {
283 struct scsi_device *sdev = cmd->device;
284 struct sym_tcb *tp;
285 struct sym_lcb *lp;
286 struct sym_ccb *cp;
287 int order;
288
289 /*
290 * Retrieve the target descriptor.
291 */
292 tp = &np->target[sdev->id];
293
294 /*
295 * Select tagged/untagged.
296 */
297 lp = sym_lp(tp, sdev->lun);
298 order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
299
300 /*
301 * Queue the SCSI IO.
302 */
303 cp = sym_get_ccb(np, cmd, order);
304 if (!cp)
305 return 1; /* Means resource shortage */
306 sym_queue_scsiio(np, cmd, cp);
307 return 0;
308 }
309
310 /*
311 * Setup buffers and pointers that address the CDB.
312 */
sym_setup_cdb(struct sym_hcb * np,struct scsi_cmnd * cmd,struct sym_ccb * cp)313 static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
314 {
315 memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len);
316
317 cp->phys.cmd.addr = CCB_BA(cp, cdb_buf[0]);
318 cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
319
320 return 0;
321 }
322
323 /*
324 * Setup pointers that address the data and start the I/O.
325 */
sym_setup_data_and_start(struct sym_hcb * np,struct scsi_cmnd * cmd,struct sym_ccb * cp)326 int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
327 {
328 u32 lastp, goalp;
329 int dir;
330
331 /*
332 * Build the CDB.
333 */
334 if (sym_setup_cdb(np, cmd, cp))
335 goto out_abort;
336
337 /*
338 * No direction means no data.
339 */
340 dir = cmd->sc_data_direction;
341 if (dir != DMA_NONE) {
342 cp->segments = sym_scatter(np, cp, cmd);
343 if (cp->segments < 0) {
344 sym_set_cam_status(cmd, DID_ERROR);
345 goto out_abort;
346 }
347
348 /*
349 * No segments means no data.
350 */
351 if (!cp->segments)
352 dir = DMA_NONE;
353 } else {
354 cp->data_len = 0;
355 cp->segments = 0;
356 }
357
358 /*
359 * Set the data pointer.
360 */
361 switch (dir) {
362 case DMA_BIDIRECTIONAL:
363 scmd_printk(KERN_INFO, cmd, "got DMA_BIDIRECTIONAL command");
364 sym_set_cam_status(cmd, DID_ERROR);
365 goto out_abort;
366 case DMA_TO_DEVICE:
367 goalp = SCRIPTA_BA(np, data_out2) + 8;
368 lastp = goalp - 8 - (cp->segments * (2*4));
369 break;
370 case DMA_FROM_DEVICE:
371 cp->host_flags |= HF_DATA_IN;
372 goalp = SCRIPTA_BA(np, data_in2) + 8;
373 lastp = goalp - 8 - (cp->segments * (2*4));
374 break;
375 case DMA_NONE:
376 default:
377 lastp = goalp = SCRIPTB_BA(np, no_data);
378 break;
379 }
380
381 /*
382 * Set all pointers values needed by SCRIPTS.
383 */
384 cp->phys.head.lastp = cpu_to_scr(lastp);
385 cp->phys.head.savep = cpu_to_scr(lastp);
386 cp->startp = cp->phys.head.savep;
387 cp->goalp = cpu_to_scr(goalp);
388
389 /*
390 * When `#ifed 1', the code below makes the driver
391 * panic on the first attempt to write to a SCSI device.
392 * It is the first test we want to do after a driver
393 * change that does not seem obviously safe. :)
394 */
395 #if 0
396 switch (cp->cdb_buf[0]) {
397 case 0x0A: case 0x2A: case 0xAA:
398 panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
399 break;
400 default:
401 break;
402 }
403 #endif
404
405 /*
406 * activate this job.
407 */
408 sym_put_start_queue(np, cp);
409 return 0;
410
411 out_abort:
412 sym_free_ccb(np, cp);
413 sym_xpt_done(np, cmd);
414 return 0;
415 }
416
417
418 /*
419 * timer daemon.
420 *
421 * Misused to keep the driver running when
422 * interrupts are not configured correctly.
423 */
sym_timer(struct sym_hcb * np)424 static void sym_timer(struct sym_hcb *np)
425 {
426 unsigned long thistime = jiffies;
427
428 /*
429 * Restart the timer.
430 */
431 np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
432 add_timer(&np->s.timer);
433
434 /*
435 * If we are resetting the ncr, wait for settle_time before
436 * clearing it. Then command processing will be resumed.
437 */
438 if (np->s.settle_time_valid) {
439 if (time_before_eq(np->s.settle_time, thistime)) {
440 if (sym_verbose >= 2 )
441 printk("%s: command processing resumed\n",
442 sym_name(np));
443 np->s.settle_time_valid = 0;
444 }
445 return;
446 }
447
448 /*
449 * Nothing to do for now, but that may come.
450 */
451 if (np->s.lasttime + 4*HZ < thistime) {
452 np->s.lasttime = thistime;
453 }
454
455 #ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
456 /*
457 * Some way-broken PCI bridges may lead to
458 * completions being lost when the clearing
459 * of the INTFLY flag by the CPU occurs
460 * concurrently with the chip raising this flag.
461 * If this ever happen, lost completions will
462 * be reaped here.
463 */
464 sym_wakeup_done(np);
465 #endif
466 }
467
468
469 /*
470 * PCI BUS error handler.
471 */
sym_log_bus_error(struct Scsi_Host * shost)472 void sym_log_bus_error(struct Scsi_Host *shost)
473 {
474 struct sym_data *sym_data = shost_priv(shost);
475 struct pci_dev *pdev = sym_data->pdev;
476 unsigned short pci_sts;
477 pci_read_config_word(pdev, PCI_STATUS, &pci_sts);
478 if (pci_sts & 0xf900) {
479 pci_write_config_word(pdev, PCI_STATUS, pci_sts);
480 shost_printk(KERN_WARNING, shost,
481 "PCI bus error: status = 0x%04x\n", pci_sts & 0xf900);
482 }
483 }
484
485 /*
486 * queuecommand method. Entered with the host adapter lock held and
487 * interrupts disabled.
488 */
sym53c8xx_queue_command_lck(struct scsi_cmnd * cmd,void (* done)(struct scsi_cmnd *))489 static int sym53c8xx_queue_command_lck(struct scsi_cmnd *cmd,
490 void (*done)(struct scsi_cmnd *))
491 {
492 struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
493 struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
494 int sts = 0;
495
496 cmd->scsi_done = done;
497 memset(ucp, 0, sizeof(*ucp));
498
499 /*
500 * Shorten our settle_time if needed for
501 * this command not to time out.
502 */
503 if (np->s.settle_time_valid && scsi_cmd_to_rq(cmd)->timeout) {
504 unsigned long tlimit = jiffies + scsi_cmd_to_rq(cmd)->timeout;
505 tlimit -= SYM_CONF_TIMER_INTERVAL*2;
506 if (time_after(np->s.settle_time, tlimit)) {
507 np->s.settle_time = tlimit;
508 }
509 }
510
511 if (np->s.settle_time_valid)
512 return SCSI_MLQUEUE_HOST_BUSY;
513
514 sts = sym_queue_command(np, cmd);
515 if (sts)
516 return SCSI_MLQUEUE_HOST_BUSY;
517 return 0;
518 }
519
DEF_SCSI_QCMD(sym53c8xx_queue_command)520 static DEF_SCSI_QCMD(sym53c8xx_queue_command)
521
522 /*
523 * Linux entry point of the interrupt handler.
524 */
525 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id)
526 {
527 struct Scsi_Host *shost = dev_id;
528 struct sym_data *sym_data = shost_priv(shost);
529 irqreturn_t result;
530
531 /* Avoid spinloop trying to handle interrupts on frozen device */
532 if (pci_channel_offline(sym_data->pdev))
533 return IRQ_NONE;
534
535 if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
536
537 spin_lock(shost->host_lock);
538 result = sym_interrupt(shost);
539 spin_unlock(shost->host_lock);
540
541 if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
542
543 return result;
544 }
545
546 /*
547 * Linux entry point of the timer handler
548 */
sym53c8xx_timer(struct timer_list * t)549 static void sym53c8xx_timer(struct timer_list *t)
550 {
551 struct sym_hcb *np = from_timer(np, t, s.timer);
552 unsigned long flags;
553
554 spin_lock_irqsave(np->s.host->host_lock, flags);
555 sym_timer(np);
556 spin_unlock_irqrestore(np->s.host->host_lock, flags);
557 }
558
559
560 /*
561 * What the eh thread wants us to perform.
562 */
563 #define SYM_EH_ABORT 0
564 #define SYM_EH_DEVICE_RESET 1
565 #define SYM_EH_BUS_RESET 2
566 #define SYM_EH_HOST_RESET 3
567
568 /*
569 * Generic method for our eh processing.
570 * The 'op' argument tells what we have to do.
571 */
sym_eh_handler(int op,char * opname,struct scsi_cmnd * cmd)572 static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
573 {
574 struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
575 struct Scsi_Host *shost = cmd->device->host;
576 struct sym_data *sym_data = shost_priv(shost);
577 struct pci_dev *pdev = sym_data->pdev;
578 struct sym_hcb *np = sym_data->ncb;
579 SYM_QUEHEAD *qp;
580 int cmd_queued = 0;
581 int sts = -1;
582 struct completion eh_done;
583
584 scmd_printk(KERN_WARNING, cmd, "%s operation started\n", opname);
585
586 /* We may be in an error condition because the PCI bus
587 * went down. In this case, we need to wait until the
588 * PCI bus is reset, the card is reset, and only then
589 * proceed with the scsi error recovery. There's no
590 * point in hurrying; take a leisurely wait.
591 */
592 #define WAIT_FOR_PCI_RECOVERY 35
593 if (pci_channel_offline(pdev)) {
594 int finished_reset = 0;
595 init_completion(&eh_done);
596 spin_lock_irq(shost->host_lock);
597 /* Make sure we didn't race */
598 if (pci_channel_offline(pdev)) {
599 BUG_ON(sym_data->io_reset);
600 sym_data->io_reset = &eh_done;
601 } else {
602 finished_reset = 1;
603 }
604 spin_unlock_irq(shost->host_lock);
605 if (!finished_reset)
606 finished_reset = wait_for_completion_timeout
607 (sym_data->io_reset,
608 WAIT_FOR_PCI_RECOVERY*HZ);
609 spin_lock_irq(shost->host_lock);
610 sym_data->io_reset = NULL;
611 spin_unlock_irq(shost->host_lock);
612 if (!finished_reset)
613 return SCSI_FAILED;
614 }
615
616 spin_lock_irq(shost->host_lock);
617 /* This one is queued in some place -> to wait for completion */
618 FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
619 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
620 if (cp->cmd == cmd) {
621 cmd_queued = 1;
622 break;
623 }
624 }
625
626 /* Try to proceed the operation we have been asked for */
627 sts = -1;
628 switch(op) {
629 case SYM_EH_ABORT:
630 sts = sym_abort_scsiio(np, cmd, 1);
631 break;
632 case SYM_EH_DEVICE_RESET:
633 sts = sym_reset_scsi_target(np, cmd->device->id);
634 break;
635 case SYM_EH_BUS_RESET:
636 sym_reset_scsi_bus(np, 1);
637 sts = 0;
638 break;
639 case SYM_EH_HOST_RESET:
640 sym_reset_scsi_bus(np, 0);
641 sym_start_up(shost, 1);
642 sts = 0;
643 break;
644 default:
645 break;
646 }
647
648 /* On error, restore everything and cross fingers :) */
649 if (sts)
650 cmd_queued = 0;
651
652 if (cmd_queued) {
653 init_completion(&eh_done);
654 ucmd->eh_done = &eh_done;
655 spin_unlock_irq(shost->host_lock);
656 if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
657 ucmd->eh_done = NULL;
658 sts = -2;
659 }
660 } else {
661 spin_unlock_irq(shost->host_lock);
662 }
663
664 dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
665 sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
666 return sts ? SCSI_FAILED : SCSI_SUCCESS;
667 }
668
669
670 /*
671 * Error handlers called from the eh thread (one thread per HBA).
672 */
sym53c8xx_eh_abort_handler(struct scsi_cmnd * cmd)673 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
674 {
675 return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
676 }
677
sym53c8xx_eh_device_reset_handler(struct scsi_cmnd * cmd)678 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
679 {
680 return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
681 }
682
sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd * cmd)683 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
684 {
685 return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
686 }
687
sym53c8xx_eh_host_reset_handler(struct scsi_cmnd * cmd)688 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
689 {
690 return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
691 }
692
693 /*
694 * Tune device queuing depth, according to various limits.
695 */
sym_tune_dev_queuing(struct sym_tcb * tp,int lun,u_short reqtags)696 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
697 {
698 struct sym_lcb *lp = sym_lp(tp, lun);
699 u_short oldtags;
700
701 if (!lp)
702 return;
703
704 oldtags = lp->s.reqtags;
705
706 if (reqtags > lp->s.scdev_depth)
707 reqtags = lp->s.scdev_depth;
708
709 lp->s.reqtags = reqtags;
710
711 if (reqtags != oldtags) {
712 dev_info(&tp->starget->dev,
713 "tagged command queuing %s, command queue depth %d.\n",
714 lp->s.reqtags ? "enabled" : "disabled", reqtags);
715 }
716 }
717
sym53c8xx_slave_alloc(struct scsi_device * sdev)718 static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
719 {
720 struct sym_hcb *np = sym_get_hcb(sdev->host);
721 struct sym_tcb *tp = &np->target[sdev->id];
722 struct sym_lcb *lp;
723 unsigned long flags;
724 int error;
725
726 if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
727 return -ENXIO;
728
729 spin_lock_irqsave(np->s.host->host_lock, flags);
730
731 /*
732 * Fail the device init if the device is flagged NOSCAN at BOOT in
733 * the NVRAM. This may speed up boot and maintain coherency with
734 * BIOS device numbering. Clearing the flag allows the user to
735 * rescan skipped devices later. We also return an error for
736 * devices not flagged for SCAN LUNS in the NVRAM since some single
737 * lun devices behave badly when asked for a non zero LUN.
738 */
739
740 if (tp->usrflags & SYM_SCAN_BOOT_DISABLED) {
741 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
742 starget_printk(KERN_INFO, sdev->sdev_target,
743 "Scan at boot disabled in NVRAM\n");
744 error = -ENXIO;
745 goto out;
746 }
747
748 if (tp->usrflags & SYM_SCAN_LUNS_DISABLED) {
749 if (sdev->lun != 0) {
750 error = -ENXIO;
751 goto out;
752 }
753 starget_printk(KERN_INFO, sdev->sdev_target,
754 "Multiple LUNs disabled in NVRAM\n");
755 }
756
757 lp = sym_alloc_lcb(np, sdev->id, sdev->lun);
758 if (!lp) {
759 error = -ENOMEM;
760 goto out;
761 }
762 if (tp->nlcb == 1)
763 tp->starget = sdev->sdev_target;
764
765 spi_min_period(tp->starget) = tp->usr_period;
766 spi_max_width(tp->starget) = tp->usr_width;
767
768 error = 0;
769 out:
770 spin_unlock_irqrestore(np->s.host->host_lock, flags);
771
772 return error;
773 }
774
775 /*
776 * Linux entry point for device queue sizing.
777 */
sym53c8xx_slave_configure(struct scsi_device * sdev)778 static int sym53c8xx_slave_configure(struct scsi_device *sdev)
779 {
780 struct sym_hcb *np = sym_get_hcb(sdev->host);
781 struct sym_tcb *tp = &np->target[sdev->id];
782 struct sym_lcb *lp = sym_lp(tp, sdev->lun);
783 int reqtags, depth_to_use;
784
785 /*
786 * Get user flags.
787 */
788 lp->curr_flags = lp->user_flags;
789
790 /*
791 * Select queue depth from driver setup.
792 * Do not use more than configured by user.
793 * Use at least 1.
794 * Do not use more than our maximum.
795 */
796 reqtags = sym_driver_setup.max_tag;
797 if (reqtags > tp->usrtags)
798 reqtags = tp->usrtags;
799 if (!sdev->tagged_supported)
800 reqtags = 0;
801 if (reqtags > SYM_CONF_MAX_TAG)
802 reqtags = SYM_CONF_MAX_TAG;
803 depth_to_use = reqtags ? reqtags : 1;
804 scsi_change_queue_depth(sdev, depth_to_use);
805 lp->s.scdev_depth = depth_to_use;
806 sym_tune_dev_queuing(tp, sdev->lun, reqtags);
807
808 if (!spi_initial_dv(sdev->sdev_target))
809 spi_dv_device(sdev);
810
811 return 0;
812 }
813
sym53c8xx_slave_destroy(struct scsi_device * sdev)814 static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
815 {
816 struct sym_hcb *np = sym_get_hcb(sdev->host);
817 struct sym_tcb *tp = &np->target[sdev->id];
818 struct sym_lcb *lp = sym_lp(tp, sdev->lun);
819 unsigned long flags;
820
821 /* if slave_alloc returned before allocating a sym_lcb, return */
822 if (!lp)
823 return;
824
825 spin_lock_irqsave(np->s.host->host_lock, flags);
826
827 if (lp->busy_itlq || lp->busy_itl) {
828 /*
829 * This really shouldn't happen, but we can't return an error
830 * so let's try to stop all on-going I/O.
831 */
832 starget_printk(KERN_WARNING, tp->starget,
833 "Removing busy LCB (%d)\n", (u8)sdev->lun);
834 sym_reset_scsi_bus(np, 1);
835 }
836
837 if (sym_free_lcb(np, sdev->id, sdev->lun) == 0) {
838 /*
839 * It was the last unit for this target.
840 */
841 tp->head.sval = 0;
842 tp->head.wval = np->rv_scntl3;
843 tp->head.uval = 0;
844 tp->tgoal.check_nego = 1;
845 tp->starget = NULL;
846 }
847
848 spin_unlock_irqrestore(np->s.host->host_lock, flags);
849 }
850
851 /*
852 * Linux entry point for info() function
853 */
sym53c8xx_info(struct Scsi_Host * host)854 static const char *sym53c8xx_info (struct Scsi_Host *host)
855 {
856 return SYM_DRIVER_NAME;
857 }
858
859
860 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
861 /*
862 * Proc file system stuff
863 *
864 * A read operation returns adapter information.
865 * A write operation is a control command.
866 * The string is parsed in the driver code and the command is passed
867 * to the sym_usercmd() function.
868 */
869
870 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
871
872 struct sym_usrcmd {
873 u_long target;
874 u_long lun;
875 u_long data;
876 u_long cmd;
877 };
878
879 #define UC_SETSYNC 10
880 #define UC_SETTAGS 11
881 #define UC_SETDEBUG 12
882 #define UC_SETWIDE 14
883 #define UC_SETFLAG 15
884 #define UC_SETVERBOSE 17
885 #define UC_RESETDEV 18
886 #define UC_CLEARDEV 19
887
sym_exec_user_command(struct sym_hcb * np,struct sym_usrcmd * uc)888 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
889 {
890 struct sym_tcb *tp;
891 int t, l;
892
893 switch (uc->cmd) {
894 case 0: return;
895
896 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
897 case UC_SETDEBUG:
898 sym_debug_flags = uc->data;
899 break;
900 #endif
901 case UC_SETVERBOSE:
902 np->verbose = uc->data;
903 break;
904 default:
905 /*
906 * We assume that other commands apply to targets.
907 * This should always be the case and avoid the below
908 * 4 lines to be repeated 6 times.
909 */
910 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
911 if (!((uc->target >> t) & 1))
912 continue;
913 tp = &np->target[t];
914 if (!tp->nlcb)
915 continue;
916
917 switch (uc->cmd) {
918
919 case UC_SETSYNC:
920 if (!uc->data || uc->data >= 255) {
921 tp->tgoal.iu = tp->tgoal.dt =
922 tp->tgoal.qas = 0;
923 tp->tgoal.offset = 0;
924 } else if (uc->data <= 9 && np->minsync_dt) {
925 if (uc->data < np->minsync_dt)
926 uc->data = np->minsync_dt;
927 tp->tgoal.iu = tp->tgoal.dt =
928 tp->tgoal.qas = 1;
929 tp->tgoal.width = 1;
930 tp->tgoal.period = uc->data;
931 tp->tgoal.offset = np->maxoffs_dt;
932 } else {
933 if (uc->data < np->minsync)
934 uc->data = np->minsync;
935 tp->tgoal.iu = tp->tgoal.dt =
936 tp->tgoal.qas = 0;
937 tp->tgoal.period = uc->data;
938 tp->tgoal.offset = np->maxoffs;
939 }
940 tp->tgoal.check_nego = 1;
941 break;
942 case UC_SETWIDE:
943 tp->tgoal.width = uc->data ? 1 : 0;
944 tp->tgoal.check_nego = 1;
945 break;
946 case UC_SETTAGS:
947 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
948 sym_tune_dev_queuing(tp, l, uc->data);
949 break;
950 case UC_RESETDEV:
951 tp->to_reset = 1;
952 np->istat_sem = SEM;
953 OUTB(np, nc_istat, SIGP|SEM);
954 break;
955 case UC_CLEARDEV:
956 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
957 struct sym_lcb *lp = sym_lp(tp, l);
958 if (lp) lp->to_clear = 1;
959 }
960 np->istat_sem = SEM;
961 OUTB(np, nc_istat, SIGP|SEM);
962 break;
963 case UC_SETFLAG:
964 tp->usrflags = uc->data;
965 break;
966 }
967 }
968 break;
969 }
970 }
971
sym_skip_spaces(char * ptr,int len)972 static int sym_skip_spaces(char *ptr, int len)
973 {
974 int cnt, c;
975
976 for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
977
978 return (len - cnt);
979 }
980
get_int_arg(char * ptr,int len,u_long * pv)981 static int get_int_arg(char *ptr, int len, u_long *pv)
982 {
983 char *end;
984
985 *pv = simple_strtoul(ptr, &end, 10);
986 return (end - ptr);
987 }
988
is_keyword(char * ptr,int len,char * verb)989 static int is_keyword(char *ptr, int len, char *verb)
990 {
991 int verb_len = strlen(verb);
992
993 if (len >= verb_len && !memcmp(verb, ptr, verb_len))
994 return verb_len;
995 else
996 return 0;
997 }
998
999 #define SKIP_SPACES(ptr, len) \
1000 if ((arg_len = sym_skip_spaces(ptr, len)) < 1) \
1001 return -EINVAL; \
1002 ptr += arg_len; len -= arg_len;
1003
1004 #define GET_INT_ARG(ptr, len, v) \
1005 if (!(arg_len = get_int_arg(ptr, len, &(v)))) \
1006 return -EINVAL; \
1007 ptr += arg_len; len -= arg_len;
1008
1009
1010 /*
1011 * Parse a control command
1012 */
1013
sym_user_command(struct Scsi_Host * shost,char * buffer,int length)1014 static int sym_user_command(struct Scsi_Host *shost, char *buffer, int length)
1015 {
1016 struct sym_hcb *np = sym_get_hcb(shost);
1017 char *ptr = buffer;
1018 int len = length;
1019 struct sym_usrcmd cmd, *uc = &cmd;
1020 int arg_len;
1021 u_long target;
1022
1023 memset(uc, 0, sizeof(*uc));
1024
1025 if (len > 0 && ptr[len-1] == '\n')
1026 --len;
1027
1028 if ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1029 uc->cmd = UC_SETSYNC;
1030 else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1031 uc->cmd = UC_SETTAGS;
1032 else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1033 uc->cmd = UC_SETVERBOSE;
1034 else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1035 uc->cmd = UC_SETWIDE;
1036 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1037 else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1038 uc->cmd = UC_SETDEBUG;
1039 #endif
1040 else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1041 uc->cmd = UC_SETFLAG;
1042 else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1043 uc->cmd = UC_RESETDEV;
1044 else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1045 uc->cmd = UC_CLEARDEV;
1046 else
1047 arg_len = 0;
1048
1049 #ifdef DEBUG_PROC_INFO
1050 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1051 #endif
1052
1053 if (!arg_len)
1054 return -EINVAL;
1055 ptr += arg_len; len -= arg_len;
1056
1057 switch(uc->cmd) {
1058 case UC_SETSYNC:
1059 case UC_SETTAGS:
1060 case UC_SETWIDE:
1061 case UC_SETFLAG:
1062 case UC_RESETDEV:
1063 case UC_CLEARDEV:
1064 SKIP_SPACES(ptr, len);
1065 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1066 ptr += arg_len; len -= arg_len;
1067 uc->target = ~0;
1068 } else {
1069 GET_INT_ARG(ptr, len, target);
1070 uc->target = (1<<target);
1071 #ifdef DEBUG_PROC_INFO
1072 printk("sym_user_command: target=%ld\n", target);
1073 #endif
1074 }
1075 break;
1076 }
1077
1078 switch(uc->cmd) {
1079 case UC_SETVERBOSE:
1080 case UC_SETSYNC:
1081 case UC_SETTAGS:
1082 case UC_SETWIDE:
1083 SKIP_SPACES(ptr, len);
1084 GET_INT_ARG(ptr, len, uc->data);
1085 #ifdef DEBUG_PROC_INFO
1086 printk("sym_user_command: data=%ld\n", uc->data);
1087 #endif
1088 break;
1089 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1090 case UC_SETDEBUG:
1091 while (len > 0) {
1092 SKIP_SPACES(ptr, len);
1093 if ((arg_len = is_keyword(ptr, len, "alloc")))
1094 uc->data |= DEBUG_ALLOC;
1095 else if ((arg_len = is_keyword(ptr, len, "phase")))
1096 uc->data |= DEBUG_PHASE;
1097 else if ((arg_len = is_keyword(ptr, len, "queue")))
1098 uc->data |= DEBUG_QUEUE;
1099 else if ((arg_len = is_keyword(ptr, len, "result")))
1100 uc->data |= DEBUG_RESULT;
1101 else if ((arg_len = is_keyword(ptr, len, "scatter")))
1102 uc->data |= DEBUG_SCATTER;
1103 else if ((arg_len = is_keyword(ptr, len, "script")))
1104 uc->data |= DEBUG_SCRIPT;
1105 else if ((arg_len = is_keyword(ptr, len, "tiny")))
1106 uc->data |= DEBUG_TINY;
1107 else if ((arg_len = is_keyword(ptr, len, "timing")))
1108 uc->data |= DEBUG_TIMING;
1109 else if ((arg_len = is_keyword(ptr, len, "nego")))
1110 uc->data |= DEBUG_NEGO;
1111 else if ((arg_len = is_keyword(ptr, len, "tags")))
1112 uc->data |= DEBUG_TAGS;
1113 else if ((arg_len = is_keyword(ptr, len, "pointer")))
1114 uc->data |= DEBUG_POINTER;
1115 else
1116 return -EINVAL;
1117 ptr += arg_len; len -= arg_len;
1118 }
1119 #ifdef DEBUG_PROC_INFO
1120 printk("sym_user_command: data=%ld\n", uc->data);
1121 #endif
1122 break;
1123 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1124 case UC_SETFLAG:
1125 while (len > 0) {
1126 SKIP_SPACES(ptr, len);
1127 if ((arg_len = is_keyword(ptr, len, "no_disc")))
1128 uc->data &= ~SYM_DISC_ENABLED;
1129 else
1130 return -EINVAL;
1131 ptr += arg_len; len -= arg_len;
1132 }
1133 break;
1134 default:
1135 break;
1136 }
1137
1138 if (len)
1139 return -EINVAL;
1140 else {
1141 unsigned long flags;
1142
1143 spin_lock_irqsave(shost->host_lock, flags);
1144 sym_exec_user_command(np, uc);
1145 spin_unlock_irqrestore(shost->host_lock, flags);
1146 }
1147 return length;
1148 }
1149
1150 #endif /* SYM_LINUX_USER_COMMAND_SUPPORT */
1151
1152
1153 /*
1154 * Copy formatted information into the input buffer.
1155 */
sym_show_info(struct seq_file * m,struct Scsi_Host * shost)1156 static int sym_show_info(struct seq_file *m, struct Scsi_Host *shost)
1157 {
1158 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1159 struct sym_data *sym_data = shost_priv(shost);
1160 struct pci_dev *pdev = sym_data->pdev;
1161 struct sym_hcb *np = sym_data->ncb;
1162
1163 seq_printf(m, "Chip " NAME53C "%s, device id 0x%x, "
1164 "revision id 0x%x\n", np->s.chip_name,
1165 pdev->device, pdev->revision);
1166 seq_printf(m, "At PCI address %s, IRQ %u\n",
1167 pci_name(pdev), pdev->irq);
1168 seq_printf(m, "Min. period factor %d, %s SCSI BUS%s\n",
1169 (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1170 np->maxwide ? "Wide" : "Narrow",
1171 np->minsync_dt ? ", DT capable" : "");
1172
1173 seq_printf(m, "Max. started commands %d, "
1174 "max. commands per LUN %d\n",
1175 SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1176
1177 return 0;
1178 #else
1179 return -EINVAL;
1180 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1181 }
1182
1183 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1184
1185 /*
1186 * Free resources claimed by sym_iomap_device(). Note that
1187 * sym_free_resources() should be used instead of this function after calling
1188 * sym_attach().
1189 */
sym_iounmap_device(struct sym_device * device)1190 static void sym_iounmap_device(struct sym_device *device)
1191 {
1192 if (device->s.ioaddr)
1193 pci_iounmap(device->pdev, device->s.ioaddr);
1194 if (device->s.ramaddr)
1195 pci_iounmap(device->pdev, device->s.ramaddr);
1196 }
1197
1198 /*
1199 * Free controller resources.
1200 */
sym_free_resources(struct sym_hcb * np,struct pci_dev * pdev,int do_free_irq)1201 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev,
1202 int do_free_irq)
1203 {
1204 /*
1205 * Free O/S specific resources.
1206 */
1207 if (do_free_irq)
1208 free_irq(pdev->irq, np->s.host);
1209 if (np->s.ioaddr)
1210 pci_iounmap(pdev, np->s.ioaddr);
1211 if (np->s.ramaddr)
1212 pci_iounmap(pdev, np->s.ramaddr);
1213 /*
1214 * Free O/S independent resources.
1215 */
1216 sym_hcb_free(np);
1217
1218 sym_mfree_dma(np, sizeof(*np), "HCB");
1219 }
1220
1221 /*
1222 * Host attach and initialisations.
1223 *
1224 * Allocate host data and ncb structure.
1225 * Remap MMIO region.
1226 * Do chip initialization.
1227 * If all is OK, install interrupt handling and
1228 * start the timer daemon.
1229 */
sym_attach(struct scsi_host_template * tpnt,int unit,struct sym_device * dev)1230 static struct Scsi_Host *sym_attach(struct scsi_host_template *tpnt, int unit,
1231 struct sym_device *dev)
1232 {
1233 struct sym_data *sym_data;
1234 struct sym_hcb *np = NULL;
1235 struct Scsi_Host *shost = NULL;
1236 struct pci_dev *pdev = dev->pdev;
1237 unsigned long flags;
1238 struct sym_fw *fw;
1239 int do_free_irq = 0;
1240
1241 printk(KERN_INFO "sym%d: <%s> rev 0x%x at pci %s irq %u\n",
1242 unit, dev->chip.name, pdev->revision, pci_name(pdev),
1243 pdev->irq);
1244
1245 /*
1246 * Get the firmware for this chip.
1247 */
1248 fw = sym_find_firmware(&dev->chip);
1249 if (!fw)
1250 goto attach_failed;
1251
1252 shost = scsi_host_alloc(tpnt, sizeof(*sym_data));
1253 if (!shost)
1254 goto attach_failed;
1255 sym_data = shost_priv(shost);
1256
1257 /*
1258 * Allocate immediately the host control block,
1259 * since we are only expecting to succeed. :)
1260 * We keep track in the HCB of all the resources that
1261 * are to be released on error.
1262 */
1263 np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1264 if (!np)
1265 goto attach_failed;
1266 np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1267 sym_data->ncb = np;
1268 sym_data->pdev = pdev;
1269 np->s.host = shost;
1270
1271 pci_set_drvdata(pdev, shost);
1272
1273 /*
1274 * Copy some useful infos to the HCB.
1275 */
1276 np->hcb_ba = vtobus(np);
1277 np->verbose = sym_driver_setup.verbose;
1278 np->s.unit = unit;
1279 np->features = dev->chip.features;
1280 np->clock_divn = dev->chip.nr_divisor;
1281 np->maxoffs = dev->chip.offset_max;
1282 np->maxburst = dev->chip.burst_max;
1283 np->myaddr = dev->host_id;
1284 np->mmio_ba = (u32)dev->mmio_base;
1285 np->ram_ba = (u32)dev->ram_base;
1286 np->s.ioaddr = dev->s.ioaddr;
1287 np->s.ramaddr = dev->s.ramaddr;
1288
1289 /*
1290 * Edit its name.
1291 */
1292 strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1293 sprintf(np->s.inst_name, "sym%d", np->s.unit);
1294
1295 if ((SYM_CONF_DMA_ADDRESSING_MODE > 0) && (np->features & FE_DAC) &&
1296 !dma_set_mask(&pdev->dev, DMA_DAC_MASK)) {
1297 set_dac(np);
1298 } else if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
1299 printf_warning("%s: No suitable DMA available\n", sym_name(np));
1300 goto attach_failed;
1301 }
1302
1303 if (sym_hcb_attach(shost, fw, dev->nvram))
1304 goto attach_failed;
1305
1306 /*
1307 * Install the interrupt handler.
1308 * If we synchonize the C code with SCRIPTS on interrupt,
1309 * we do not want to share the INTR line at all.
1310 */
1311 if (request_irq(pdev->irq, sym53c8xx_intr, IRQF_SHARED, NAME53C8XX,
1312 shost)) {
1313 printf_err("%s: request irq %u failure\n",
1314 sym_name(np), pdev->irq);
1315 goto attach_failed;
1316 }
1317 do_free_irq = 1;
1318
1319 /*
1320 * After SCSI devices have been opened, we cannot
1321 * reset the bus safely, so we do it here.
1322 */
1323 spin_lock_irqsave(shost->host_lock, flags);
1324 if (sym_reset_scsi_bus(np, 0))
1325 goto reset_failed;
1326
1327 /*
1328 * Start the SCRIPTS.
1329 */
1330 sym_start_up(shost, 1);
1331
1332 /*
1333 * Start the timer daemon
1334 */
1335 timer_setup(&np->s.timer, sym53c8xx_timer, 0);
1336 np->s.lasttime=0;
1337 sym_timer (np);
1338
1339 /*
1340 * Fill Linux host instance structure
1341 * and return success.
1342 */
1343 shost->max_channel = 0;
1344 shost->this_id = np->myaddr;
1345 shost->max_id = np->maxwide ? 16 : 8;
1346 shost->max_lun = SYM_CONF_MAX_LUN;
1347 shost->unique_id = pci_resource_start(pdev, 0);
1348 shost->cmd_per_lun = SYM_CONF_MAX_TAG;
1349 shost->can_queue = (SYM_CONF_MAX_START-2);
1350 shost->sg_tablesize = SYM_CONF_MAX_SG;
1351 shost->max_cmd_len = 16;
1352 BUG_ON(sym2_transport_template == NULL);
1353 shost->transportt = sym2_transport_template;
1354
1355 /* 53c896 rev 1 errata: DMA may not cross 16MB boundary */
1356 if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 2)
1357 shost->dma_boundary = 0xFFFFFF;
1358
1359 spin_unlock_irqrestore(shost->host_lock, flags);
1360
1361 return shost;
1362
1363 reset_failed:
1364 printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1365 "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1366 spin_unlock_irqrestore(shost->host_lock, flags);
1367 attach_failed:
1368 printf_info("sym%d: giving up ...\n", unit);
1369 if (np)
1370 sym_free_resources(np, pdev, do_free_irq);
1371 else
1372 sym_iounmap_device(dev);
1373 if (shost)
1374 scsi_host_put(shost);
1375
1376 return NULL;
1377 }
1378
1379
1380 /*
1381 * Detect and try to read SYMBIOS and TEKRAM NVRAM.
1382 */
1383 #if SYM_CONF_NVRAM_SUPPORT
sym_get_nvram(struct sym_device * devp,struct sym_nvram * nvp)1384 static void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1385 {
1386 devp->nvram = nvp;
1387 nvp->type = 0;
1388
1389 sym_read_nvram(devp, nvp);
1390 }
1391 #else
sym_get_nvram(struct sym_device * devp,struct sym_nvram * nvp)1392 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1393 {
1394 }
1395 #endif /* SYM_CONF_NVRAM_SUPPORT */
1396
sym_check_supported(struct sym_device * device)1397 static int sym_check_supported(struct sym_device *device)
1398 {
1399 struct sym_chip *chip;
1400 struct pci_dev *pdev = device->pdev;
1401 unsigned long io_port = pci_resource_start(pdev, 0);
1402 int i;
1403
1404 /*
1405 * If user excluded this chip, do not initialize it.
1406 * I hate this code so much. Must kill it.
1407 */
1408 if (io_port) {
1409 for (i = 0 ; i < 8 ; i++) {
1410 if (sym_driver_setup.excludes[i] == io_port)
1411 return -ENODEV;
1412 }
1413 }
1414
1415 /*
1416 * Check if the chip is supported. Then copy the chip description
1417 * to our device structure so we can make it match the actual device
1418 * and options.
1419 */
1420 chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1421 if (!chip) {
1422 dev_info(&pdev->dev, "device not supported\n");
1423 return -ENODEV;
1424 }
1425 memcpy(&device->chip, chip, sizeof(device->chip));
1426
1427 return 0;
1428 }
1429
1430 /*
1431 * Ignore Symbios chips controlled by various RAID controllers.
1432 * These controllers set value 0x52414944 at RAM end - 16.
1433 */
sym_check_raid(struct sym_device * device)1434 static int sym_check_raid(struct sym_device *device)
1435 {
1436 unsigned int ram_size, ram_val;
1437
1438 if (!device->s.ramaddr)
1439 return 0;
1440
1441 if (device->chip.features & FE_RAM8K)
1442 ram_size = 8192;
1443 else
1444 ram_size = 4096;
1445
1446 ram_val = readl(device->s.ramaddr + ram_size - 16);
1447 if (ram_val != 0x52414944)
1448 return 0;
1449
1450 dev_info(&device->pdev->dev,
1451 "not initializing, driven by RAID controller.\n");
1452 return -ENODEV;
1453 }
1454
sym_set_workarounds(struct sym_device * device)1455 static int sym_set_workarounds(struct sym_device *device)
1456 {
1457 struct sym_chip *chip = &device->chip;
1458 struct pci_dev *pdev = device->pdev;
1459 u_short status_reg;
1460
1461 /*
1462 * (ITEM 12 of a DEL about the 896 I haven't yet).
1463 * We must ensure the chip will use WRITE AND INVALIDATE.
1464 * The revision number limit is for now arbitrary.
1465 */
1466 if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 0x4) {
1467 chip->features |= (FE_WRIE | FE_CLSE);
1468 }
1469
1470 /* If the chip can do Memory Write Invalidate, enable it */
1471 if (chip->features & FE_WRIE) {
1472 if (pci_set_mwi(pdev))
1473 return -ENODEV;
1474 }
1475
1476 /*
1477 * Work around for errant bit in 895A. The 66Mhz
1478 * capable bit is set erroneously. Clear this bit.
1479 * (Item 1 DEL 533)
1480 *
1481 * Make sure Config space and Features agree.
1482 *
1483 * Recall: writes are not normal to status register -
1484 * write a 1 to clear and a 0 to leave unchanged.
1485 * Can only reset bits.
1486 */
1487 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1488 if (chip->features & FE_66MHZ) {
1489 if (!(status_reg & PCI_STATUS_66MHZ))
1490 chip->features &= ~FE_66MHZ;
1491 } else {
1492 if (status_reg & PCI_STATUS_66MHZ) {
1493 status_reg = PCI_STATUS_66MHZ;
1494 pci_write_config_word(pdev, PCI_STATUS, status_reg);
1495 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1496 }
1497 }
1498
1499 return 0;
1500 }
1501
1502 /*
1503 * Map HBA registers and on-chip SRAM (if present).
1504 */
sym_iomap_device(struct sym_device * device)1505 static int sym_iomap_device(struct sym_device *device)
1506 {
1507 struct pci_dev *pdev = device->pdev;
1508 struct pci_bus_region bus_addr;
1509 int i = 2;
1510
1511 pcibios_resource_to_bus(pdev->bus, &bus_addr, &pdev->resource[1]);
1512 device->mmio_base = bus_addr.start;
1513
1514 if (device->chip.features & FE_RAM) {
1515 /*
1516 * If the BAR is 64-bit, resource 2 will be occupied by the
1517 * upper 32 bits
1518 */
1519 if (!pdev->resource[i].flags)
1520 i++;
1521 pcibios_resource_to_bus(pdev->bus, &bus_addr,
1522 &pdev->resource[i]);
1523 device->ram_base = bus_addr.start;
1524 }
1525
1526 #ifdef CONFIG_SCSI_SYM53C8XX_MMIO
1527 if (device->mmio_base)
1528 device->s.ioaddr = pci_iomap(pdev, 1,
1529 pci_resource_len(pdev, 1));
1530 #endif
1531 if (!device->s.ioaddr)
1532 device->s.ioaddr = pci_iomap(pdev, 0,
1533 pci_resource_len(pdev, 0));
1534 if (!device->s.ioaddr) {
1535 dev_err(&pdev->dev, "could not map registers; giving up.\n");
1536 return -EIO;
1537 }
1538 if (device->ram_base) {
1539 device->s.ramaddr = pci_iomap(pdev, i,
1540 pci_resource_len(pdev, i));
1541 if (!device->s.ramaddr) {
1542 dev_warn(&pdev->dev,
1543 "could not map SRAM; continuing anyway.\n");
1544 device->ram_base = 0;
1545 }
1546 }
1547
1548 return 0;
1549 }
1550
1551 /*
1552 * The NCR PQS and PDS cards are constructed as a DEC bridge
1553 * behind which sits a proprietary NCR memory controller and
1554 * either four or two 53c875s as separate devices. We can tell
1555 * if an 875 is part of a PQS/PDS or not since if it is, it will
1556 * be on the same bus as the memory controller. In its usual
1557 * mode of operation, the 875s are slaved to the memory
1558 * controller for all transfers. To operate with the Linux
1559 * driver, the memory controller is disabled and the 875s
1560 * freed to function independently. The only wrinkle is that
1561 * the preset SCSI ID (which may be zero) must be read in from
1562 * a special configuration space register of the 875.
1563 */
sym_config_pqs(struct pci_dev * pdev,struct sym_device * sym_dev)1564 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1565 {
1566 int slot;
1567 u8 tmp;
1568
1569 for (slot = 0; slot < 256; slot++) {
1570 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1571
1572 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1573 pci_dev_put(memc);
1574 continue;
1575 }
1576
1577 /* bit 1: allow individual 875 configuration */
1578 pci_read_config_byte(memc, 0x44, &tmp);
1579 if ((tmp & 0x2) == 0) {
1580 tmp |= 0x2;
1581 pci_write_config_byte(memc, 0x44, tmp);
1582 }
1583
1584 /* bit 2: drive individual 875 interrupts to the bus */
1585 pci_read_config_byte(memc, 0x45, &tmp);
1586 if ((tmp & 0x4) == 0) {
1587 tmp |= 0x4;
1588 pci_write_config_byte(memc, 0x45, tmp);
1589 }
1590
1591 pci_dev_put(memc);
1592 break;
1593 }
1594
1595 pci_read_config_byte(pdev, 0x84, &tmp);
1596 sym_dev->host_id = tmp;
1597 }
1598
1599 /*
1600 * Called before unloading the module.
1601 * Detach the host.
1602 * We have to free resources and halt the NCR chip.
1603 */
sym_detach(struct Scsi_Host * shost,struct pci_dev * pdev)1604 static int sym_detach(struct Scsi_Host *shost, struct pci_dev *pdev)
1605 {
1606 struct sym_hcb *np = sym_get_hcb(shost);
1607 printk("%s: detaching ...\n", sym_name(np));
1608
1609 del_timer_sync(&np->s.timer);
1610
1611 /*
1612 * Reset NCR chip.
1613 * We should use sym_soft_reset(), but we don't want to do
1614 * so, since we may not be safe if interrupts occur.
1615 */
1616 printk("%s: resetting chip\n", sym_name(np));
1617 OUTB(np, nc_istat, SRST);
1618 INB(np, nc_mbox1);
1619 udelay(10);
1620 OUTB(np, nc_istat, 0);
1621
1622 sym_free_resources(np, pdev, 1);
1623 scsi_host_put(shost);
1624
1625 return 1;
1626 }
1627
1628 /*
1629 * Driver host template.
1630 */
1631 static struct scsi_host_template sym2_template = {
1632 .module = THIS_MODULE,
1633 .name = "sym53c8xx",
1634 .info = sym53c8xx_info,
1635 .queuecommand = sym53c8xx_queue_command,
1636 .slave_alloc = sym53c8xx_slave_alloc,
1637 .slave_configure = sym53c8xx_slave_configure,
1638 .slave_destroy = sym53c8xx_slave_destroy,
1639 .eh_abort_handler = sym53c8xx_eh_abort_handler,
1640 .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1641 .eh_bus_reset_handler = sym53c8xx_eh_bus_reset_handler,
1642 .eh_host_reset_handler = sym53c8xx_eh_host_reset_handler,
1643 .this_id = 7,
1644 .max_sectors = 0xFFFF,
1645 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1646 .show_info = sym_show_info,
1647 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1648 .write_info = sym_user_command,
1649 #endif
1650 .proc_name = NAME53C8XX,
1651 #endif
1652 };
1653
1654 static int attach_count;
1655
sym2_probe(struct pci_dev * pdev,const struct pci_device_id * ent)1656 static int sym2_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1657 {
1658 struct sym_device sym_dev;
1659 struct sym_nvram nvram;
1660 struct Scsi_Host *shost;
1661 int do_iounmap = 0;
1662 int do_disable_device = 1;
1663
1664 memset(&sym_dev, 0, sizeof(sym_dev));
1665 memset(&nvram, 0, sizeof(nvram));
1666 sym_dev.pdev = pdev;
1667 sym_dev.host_id = SYM_SETUP_HOST_ID;
1668
1669 if (pci_enable_device(pdev))
1670 goto leave;
1671
1672 pci_set_master(pdev);
1673
1674 if (pci_request_regions(pdev, NAME53C8XX))
1675 goto disable;
1676
1677 if (sym_check_supported(&sym_dev))
1678 goto free;
1679
1680 if (sym_iomap_device(&sym_dev))
1681 goto free;
1682 do_iounmap = 1;
1683
1684 if (sym_check_raid(&sym_dev)) {
1685 do_disable_device = 0; /* Don't disable the device */
1686 goto free;
1687 }
1688
1689 if (sym_set_workarounds(&sym_dev))
1690 goto free;
1691
1692 sym_config_pqs(pdev, &sym_dev);
1693
1694 sym_get_nvram(&sym_dev, &nvram);
1695
1696 do_iounmap = 0; /* Don't sym_iounmap_device() after sym_attach(). */
1697 shost = sym_attach(&sym2_template, attach_count, &sym_dev);
1698 if (!shost)
1699 goto free;
1700
1701 if (scsi_add_host(shost, &pdev->dev))
1702 goto detach;
1703 scsi_scan_host(shost);
1704
1705 attach_count++;
1706
1707 return 0;
1708
1709 detach:
1710 sym_detach(pci_get_drvdata(pdev), pdev);
1711 free:
1712 if (do_iounmap)
1713 sym_iounmap_device(&sym_dev);
1714 pci_release_regions(pdev);
1715 disable:
1716 if (do_disable_device)
1717 pci_disable_device(pdev);
1718 leave:
1719 return -ENODEV;
1720 }
1721
sym2_remove(struct pci_dev * pdev)1722 static void sym2_remove(struct pci_dev *pdev)
1723 {
1724 struct Scsi_Host *shost = pci_get_drvdata(pdev);
1725
1726 scsi_remove_host(shost);
1727 sym_detach(shost, pdev);
1728 pci_release_regions(pdev);
1729 pci_disable_device(pdev);
1730
1731 attach_count--;
1732 }
1733
1734 /**
1735 * sym2_io_error_detected() - called when PCI error is detected
1736 * @pdev: pointer to PCI device
1737 * @state: current state of the PCI slot
1738 */
sym2_io_error_detected(struct pci_dev * pdev,pci_channel_state_t state)1739 static pci_ers_result_t sym2_io_error_detected(struct pci_dev *pdev,
1740 pci_channel_state_t state)
1741 {
1742 /* If slot is permanently frozen, turn everything off */
1743 if (state == pci_channel_io_perm_failure) {
1744 sym2_remove(pdev);
1745 return PCI_ERS_RESULT_DISCONNECT;
1746 }
1747
1748 disable_irq(pdev->irq);
1749 pci_disable_device(pdev);
1750
1751 /* Request that MMIO be enabled, so register dump can be taken. */
1752 return PCI_ERS_RESULT_CAN_RECOVER;
1753 }
1754
1755 /**
1756 * sym2_io_slot_dump - Enable MMIO and dump debug registers
1757 * @pdev: pointer to PCI device
1758 */
sym2_io_slot_dump(struct pci_dev * pdev)1759 static pci_ers_result_t sym2_io_slot_dump(struct pci_dev *pdev)
1760 {
1761 struct Scsi_Host *shost = pci_get_drvdata(pdev);
1762
1763 sym_dump_registers(shost);
1764
1765 /* Request a slot reset. */
1766 return PCI_ERS_RESULT_NEED_RESET;
1767 }
1768
1769 /**
1770 * sym2_reset_workarounds - hardware-specific work-arounds
1771 * @pdev: pointer to PCI device
1772 *
1773 * This routine is similar to sym_set_workarounds(), except
1774 * that, at this point, we already know that the device was
1775 * successfully initialized at least once before, and so most
1776 * of the steps taken there are un-needed here.
1777 */
sym2_reset_workarounds(struct pci_dev * pdev)1778 static void sym2_reset_workarounds(struct pci_dev *pdev)
1779 {
1780 u_short status_reg;
1781 struct sym_chip *chip;
1782
1783 chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1784
1785 /* Work around for errant bit in 895A, in a fashion
1786 * similar to what is done in sym_set_workarounds().
1787 */
1788 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1789 if (!(chip->features & FE_66MHZ) && (status_reg & PCI_STATUS_66MHZ)) {
1790 status_reg = PCI_STATUS_66MHZ;
1791 pci_write_config_word(pdev, PCI_STATUS, status_reg);
1792 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1793 }
1794 }
1795
1796 /**
1797 * sym2_io_slot_reset() - called when the pci bus has been reset.
1798 * @pdev: pointer to PCI device
1799 *
1800 * Restart the card from scratch.
1801 */
sym2_io_slot_reset(struct pci_dev * pdev)1802 static pci_ers_result_t sym2_io_slot_reset(struct pci_dev *pdev)
1803 {
1804 struct Scsi_Host *shost = pci_get_drvdata(pdev);
1805 struct sym_hcb *np = sym_get_hcb(shost);
1806
1807 printk(KERN_INFO "%s: recovering from a PCI slot reset\n",
1808 sym_name(np));
1809
1810 if (pci_enable_device(pdev)) {
1811 printk(KERN_ERR "%s: Unable to enable after PCI reset\n",
1812 sym_name(np));
1813 return PCI_ERS_RESULT_DISCONNECT;
1814 }
1815
1816 pci_set_master(pdev);
1817 enable_irq(pdev->irq);
1818
1819 /* If the chip can do Memory Write Invalidate, enable it */
1820 if (np->features & FE_WRIE) {
1821 if (pci_set_mwi(pdev))
1822 return PCI_ERS_RESULT_DISCONNECT;
1823 }
1824
1825 /* Perform work-arounds, analogous to sym_set_workarounds() */
1826 sym2_reset_workarounds(pdev);
1827
1828 /* Perform host reset only on one instance of the card */
1829 if (PCI_FUNC(pdev->devfn) == 0) {
1830 if (sym_reset_scsi_bus(np, 0)) {
1831 printk(KERN_ERR "%s: Unable to reset scsi host\n",
1832 sym_name(np));
1833 return PCI_ERS_RESULT_DISCONNECT;
1834 }
1835 sym_start_up(shost, 1);
1836 }
1837
1838 return PCI_ERS_RESULT_RECOVERED;
1839 }
1840
1841 /**
1842 * sym2_io_resume() - resume normal ops after PCI reset
1843 * @pdev: pointer to PCI device
1844 *
1845 * Called when the error recovery driver tells us that its
1846 * OK to resume normal operation. Use completion to allow
1847 * halted scsi ops to resume.
1848 */
sym2_io_resume(struct pci_dev * pdev)1849 static void sym2_io_resume(struct pci_dev *pdev)
1850 {
1851 struct Scsi_Host *shost = pci_get_drvdata(pdev);
1852 struct sym_data *sym_data = shost_priv(shost);
1853
1854 spin_lock_irq(shost->host_lock);
1855 if (sym_data->io_reset)
1856 complete(sym_data->io_reset);
1857 spin_unlock_irq(shost->host_lock);
1858 }
1859
sym2_get_signalling(struct Scsi_Host * shost)1860 static void sym2_get_signalling(struct Scsi_Host *shost)
1861 {
1862 struct sym_hcb *np = sym_get_hcb(shost);
1863 enum spi_signal_type type;
1864
1865 switch (np->scsi_mode) {
1866 case SMODE_SE:
1867 type = SPI_SIGNAL_SE;
1868 break;
1869 case SMODE_LVD:
1870 type = SPI_SIGNAL_LVD;
1871 break;
1872 case SMODE_HVD:
1873 type = SPI_SIGNAL_HVD;
1874 break;
1875 default:
1876 type = SPI_SIGNAL_UNKNOWN;
1877 break;
1878 }
1879 spi_signalling(shost) = type;
1880 }
1881
sym2_set_offset(struct scsi_target * starget,int offset)1882 static void sym2_set_offset(struct scsi_target *starget, int offset)
1883 {
1884 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1885 struct sym_hcb *np = sym_get_hcb(shost);
1886 struct sym_tcb *tp = &np->target[starget->id];
1887
1888 tp->tgoal.offset = offset;
1889 tp->tgoal.check_nego = 1;
1890 }
1891
sym2_set_period(struct scsi_target * starget,int period)1892 static void sym2_set_period(struct scsi_target *starget, int period)
1893 {
1894 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1895 struct sym_hcb *np = sym_get_hcb(shost);
1896 struct sym_tcb *tp = &np->target[starget->id];
1897
1898 /* have to have DT for these transfers, but DT will also
1899 * set width, so check that this is allowed */
1900 if (period <= np->minsync && spi_width(starget))
1901 tp->tgoal.dt = 1;
1902
1903 tp->tgoal.period = period;
1904 tp->tgoal.check_nego = 1;
1905 }
1906
sym2_set_width(struct scsi_target * starget,int width)1907 static void sym2_set_width(struct scsi_target *starget, int width)
1908 {
1909 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1910 struct sym_hcb *np = sym_get_hcb(shost);
1911 struct sym_tcb *tp = &np->target[starget->id];
1912
1913 /* It is illegal to have DT set on narrow transfers. If DT is
1914 * clear, we must also clear IU and QAS. */
1915 if (width == 0)
1916 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1917
1918 tp->tgoal.width = width;
1919 tp->tgoal.check_nego = 1;
1920 }
1921
sym2_set_dt(struct scsi_target * starget,int dt)1922 static void sym2_set_dt(struct scsi_target *starget, int dt)
1923 {
1924 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1925 struct sym_hcb *np = sym_get_hcb(shost);
1926 struct sym_tcb *tp = &np->target[starget->id];
1927
1928 /* We must clear QAS and IU if DT is clear */
1929 if (dt)
1930 tp->tgoal.dt = 1;
1931 else
1932 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
1933 tp->tgoal.check_nego = 1;
1934 }
1935
1936 #if 0
1937 static void sym2_set_iu(struct scsi_target *starget, int iu)
1938 {
1939 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1940 struct sym_hcb *np = sym_get_hcb(shost);
1941 struct sym_tcb *tp = &np->target[starget->id];
1942
1943 if (iu)
1944 tp->tgoal.iu = tp->tgoal.dt = 1;
1945 else
1946 tp->tgoal.iu = 0;
1947 tp->tgoal.check_nego = 1;
1948 }
1949
1950 static void sym2_set_qas(struct scsi_target *starget, int qas)
1951 {
1952 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1953 struct sym_hcb *np = sym_get_hcb(shost);
1954 struct sym_tcb *tp = &np->target[starget->id];
1955
1956 if (qas)
1957 tp->tgoal.dt = tp->tgoal.qas = 1;
1958 else
1959 tp->tgoal.qas = 0;
1960 tp->tgoal.check_nego = 1;
1961 }
1962 #endif
1963
1964 static struct spi_function_template sym2_transport_functions = {
1965 .set_offset = sym2_set_offset,
1966 .show_offset = 1,
1967 .set_period = sym2_set_period,
1968 .show_period = 1,
1969 .set_width = sym2_set_width,
1970 .show_width = 1,
1971 .set_dt = sym2_set_dt,
1972 .show_dt = 1,
1973 #if 0
1974 .set_iu = sym2_set_iu,
1975 .show_iu = 1,
1976 .set_qas = sym2_set_qas,
1977 .show_qas = 1,
1978 #endif
1979 .get_signalling = sym2_get_signalling,
1980 };
1981
1982 static struct pci_device_id sym2_id_table[] = {
1983 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
1984 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
1985 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
1986 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
1987 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
1988 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
1989 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
1990 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
1991 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
1992 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
1993 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
1994 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
1995 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
1996 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8, 0xffff00, 0UL },
1997 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
1998 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
1999 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2000 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2001 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2002 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2003 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2004 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2005 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2006 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8, 0xffff00, 0UL }, /* new */
2007 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2008 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2009 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2010 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2011 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2012 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2013 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2014 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2015 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2016 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2017 { 0, }
2018 };
2019
2020 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2021
2022 static const struct pci_error_handlers sym2_err_handler = {
2023 .error_detected = sym2_io_error_detected,
2024 .mmio_enabled = sym2_io_slot_dump,
2025 .slot_reset = sym2_io_slot_reset,
2026 .resume = sym2_io_resume,
2027 };
2028
2029 static struct pci_driver sym2_driver = {
2030 .name = NAME53C8XX,
2031 .id_table = sym2_id_table,
2032 .probe = sym2_probe,
2033 .remove = sym2_remove,
2034 .err_handler = &sym2_err_handler,
2035 };
2036
sym2_init(void)2037 static int __init sym2_init(void)
2038 {
2039 int error;
2040
2041 sym2_setup_params();
2042 sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2043 if (!sym2_transport_template)
2044 return -ENODEV;
2045
2046 error = pci_register_driver(&sym2_driver);
2047 if (error)
2048 spi_release_transport(sym2_transport_template);
2049 return error;
2050 }
2051
sym2_exit(void)2052 static void __exit sym2_exit(void)
2053 {
2054 pci_unregister_driver(&sym2_driver);
2055 spi_release_transport(sym2_transport_template);
2056 }
2057
2058 module_init(sym2_init);
2059 module_exit(sym2_exit);
2060