projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
SCSI host lock push-down
[linux-2.6-block.git] / drivers / scsi / sym53c8xx_2 / sym_glue.c
CommitLineData
1da177e4
LT		 1/*
2 * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
3 * of PCI-SCSI IO processors.
4 *
5 * Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
6 * Copyright (c) 2003-2005 Matthew Wilcox <matthew@wil.cx>
7 *
8 * This driver is derived from the Linux sym53c8xx driver.
9 * Copyright (C) 1998-2000 Gerard Roudier
10 *
11 * The sym53c8xx driver is derived from the ncr53c8xx driver that had been
12 * a port of the FreeBSD ncr driver to Linux-1.2.13.
13 *
14 * The original ncr driver has been written for 386bsd and FreeBSD by
15 * Wolfgang Stanglmeier <wolf@cologne.de>
16 * Stefan Esser <se@mi.Uni-Koeln.de>
17 * Copyright (C) 1994 Wolfgang Stanglmeier
18 *
19 * Other major contributions:
20 *
21 * NVRAM detection and reading.
22 * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
23 *
24 *-----------------------------------------------------------------------------
25 *
26 * This program is free software; you can redistribute it and/or modify
27 * it under the terms of the GNU General Public License as published by
28 * the Free Software Foundation; either version 2 of the License, or
29 * (at your option) any later version.
30 *
31 * This program is distributed in the hope that it will be useful,
32 * but WITHOUT ANY WARRANTY; without even the implied warranty of
33 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
34 * GNU General Public License for more details.
35 *
36 * You should have received a copy of the GNU General Public License
37 * along with this program; if not, write to the Free Software
38 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
39 */
40#include <linux/ctype.h>
41#include <linux/init.h>
1da177e4
LT		 42#include <linux/module.h>
43#include <linux/moduleparam.h>
44#include <linux/spinlock.h>
45#include <scsi/scsi.h>
46#include <scsi/scsi_tcq.h>
47#include <scsi/scsi_device.h>
48#include <scsi/scsi_transport.h>
49
50#include "sym_glue.h"
51#include "sym_nvram.h"
52
53#define NAME53C "sym53c"
54#define NAME53C8XX "sym53c8xx"
55
1da177e4
LT		 56struct sym_driver_setup sym_driver_setup = SYM_LINUX_DRIVER_SETUP;
57unsigned int sym_debug_flags = 0;
58
59static char *excl_string;
60static char *safe_string;
61module_param_named(cmd_per_lun, sym_driver_setup.max_tag, ushort, 0);
1da177e4
LT		 62module_param_named(burst, sym_driver_setup.burst_order, byte, 0);
63module_param_named(led, sym_driver_setup.scsi_led, byte, 0);
64module_param_named(diff, sym_driver_setup.scsi_diff, byte, 0);
65module_param_named(irqm, sym_driver_setup.irq_mode, byte, 0);
66module_param_named(buschk, sym_driver_setup.scsi_bus_check, byte, 0);
67module_param_named(hostid, sym_driver_setup.host_id, byte, 0);
68module_param_named(verb, sym_driver_setup.verbose, byte, 0);
69module_param_named(debug, sym_debug_flags, uint, 0);
70module_param_named(settle, sym_driver_setup.settle_delay, byte, 0);
71module_param_named(nvram, sym_driver_setup.use_nvram, byte, 0);
72module_param_named(excl, excl_string, charp, 0);
73module_param_named(safe, safe_string, charp, 0);
74
75MODULE_PARM_DESC(cmd_per_lun, "The maximum number of tags to use by default");
1da177e4
LT		 76MODULE_PARM_DESC(burst, "Maximum burst. 0 to disable, 255 to read from registers");
77MODULE_PARM_DESC(led, "Set to 1 to enable LED support");
78MODULE_PARM_DESC(diff, "0 for no differential mode, 1 for BIOS, 2 for always, 3 for not GPIO3");
79MODULE_PARM_DESC(irqm, "0 for open drain, 1 to leave alone, 2 for totem pole");
80MODULE_PARM_DESC(buschk, "0 to not check, 1 for detach on error, 2 for warn on error");
81MODULE_PARM_DESC(hostid, "The SCSI ID to use for the host adapters");
82MODULE_PARM_DESC(verb, "0 for minimal verbosity, 1 for normal, 2 for excessive");
83MODULE_PARM_DESC(debug, "Set bits to enable debugging");
84MODULE_PARM_DESC(settle, "Settle delay in seconds. Default 3");
85MODULE_PARM_DESC(nvram, "Option currently not used");
86MODULE_PARM_DESC(excl, "List ioport addresses here to prevent controllers from being attached");
87MODULE_PARM_DESC(safe, "Set other settings to a \"safe mode\"");
88
89MODULE_LICENSE("GPL");
90MODULE_VERSION(SYM_VERSION);
91MODULE_AUTHOR("Matthew Wilcox <matthew@wil.cx>");
92MODULE_DESCRIPTION("NCR, Symbios and LSI 8xx and 1010 PCI SCSI adapters");
93
94static void sym2_setup_params(void)
95{
96 char *p = excl_string;
97 int xi = 0;
98
99 while (p && (xi < 8)) {
100 char *next_p;
101 int val = (int) simple_strtoul(p, &next_p, 0);
102 sym_driver_setup.excludes[xi++] = val;
103 p = next_p;
104 }
105
106 if (safe_string) {
107 if (*safe_string == 'y') {
108 sym_driver_setup.max_tag = 0;
109 sym_driver_setup.burst_order = 0;
110 sym_driver_setup.scsi_led = 0;
111 sym_driver_setup.scsi_diff = 1;
112 sym_driver_setup.irq_mode = 0;
113 sym_driver_setup.scsi_bus_check = 2;
114 sym_driver_setup.host_id = 7;
115 sym_driver_setup.verbose = 2;
116 sym_driver_setup.settle_delay = 10;
117 sym_driver_setup.use_nvram = 1;
118 } else if (*safe_string != 'n') {
119 printk(KERN_WARNING NAME53C8XX "Ignoring parameter %s"
120 " passed to safe option", safe_string);
121 }
122 }
123}
124
1da177e4
LT		 125static struct scsi_transport_template *sym2_transport_template = NULL;
126
1da177e4
LT		 127/*
128 * Driver private area in the SCSI command structure.
129 */
130struct sym_ucmd { /* Override the SCSI pointer structure */
d68cd759 131 struct completion *eh_done; /* SCSI error handling */
1da177e4
LT		 132};
133
134#define SYM_UCMD_PTR(cmd) ((struct sym_ucmd *)(&(cmd)->SCp))
135#define SYM_SOFTC_PTR(cmd) sym_get_hcb(cmd->device->host)
136
1da177e4
LT		 137/*
138 * Complete a pending CAM CCB.
139 */
140void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *cmd)
141{
2ba65367
MW		 142 struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
143 BUILD_BUG_ON(sizeof(struct scsi_pointer) < sizeof(struct sym_ucmd));
144
145 if (ucmd->eh_done)
146 complete(ucmd->eh_done);
147
39c05d1e 148 scsi_dma_unmap(cmd);
1da177e4
LT		 149 cmd->scsi_done(cmd);
150}
151
1da177e4
LT		 152/*
153 * Tell the SCSI layer about a BUS RESET.
154 */
155void sym_xpt_async_bus_reset(struct sym_hcb *np)
156{
157 printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
158 np->s.settle_time = jiffies + sym_driver_setup.settle_delay * HZ;
159 np->s.settle_time_valid = 1;
160 if (sym_verbose >= 2)
161 printf_info("%s: command processing suspended for %d seconds\n",
162 sym_name(np), sym_driver_setup.settle_delay);
163}
164
1da177e4
LT		 165/*
166 * Choose the more appropriate CAM status if
167 * the IO encountered an extended error.
168 */
169static int sym_xerr_cam_status(int cam_status, int x_status)
170{
171 if (x_status) {
172 if (x_status & XE_PARITY_ERR)
173 cam_status = DID_PARITY;
174 else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN))
175 cam_status = DID_ERROR;
176 else if (x_status & XE_BAD_PHASE)
177 cam_status = DID_ERROR;
178 else
179 cam_status = DID_ERROR;
180 }
181 return cam_status;
182}
183
184/*
185 * Build CAM result for a failed or auto-sensed IO.
186 */
187void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid)
188{
189 struct scsi_cmnd *cmd = cp->cmd;
190 u_int cam_status, scsi_status, drv_status;
191
192 drv_status = 0;
193 cam_status = DID_OK;
194 scsi_status = cp->ssss_status;
195
196 if (cp->host_flags & HF_SENSE) {
197 scsi_status = cp->sv_scsi_status;
198 resid = cp->sv_resid;
199 if (sym_verbose && cp->sv_xerr_status)
200 sym_print_xerr(cmd, cp->sv_xerr_status);
201 if (cp->host_status == HS_COMPLETE &&
202 cp->ssss_status == S_GOOD &&
203 cp->xerr_status == 0) {
204 cam_status = sym_xerr_cam_status(DID_OK,
205 cp->sv_xerr_status);
206 drv_status = DRIVER_SENSE;
207 /*
208 * Bounce back the sense data to user.
209 */
de15c201 210 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1da177e4 211 memcpy(cmd->sense_buffer, cp->sns_bbuf,
b80ca4f7 212 min(SCSI_SENSE_BUFFERSIZE, SYM_SNS_BBUF_LEN));
1da177e4
LT		 213#if 0
214 /*
215 * If the device reports a UNIT ATTENTION condition
216 * due to a RESET condition, we should consider all
217 * disconnect CCBs for this unit as aborted.
218 */
219 if (1) {
220 u_char *p;
221 p = (u_char *) cmd->sense_data;
222 if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
223 sym_clear_tasks(np, DID_ABORT,
224 cp->target,cp->lun, -1);
225 }
226#endif
227 } else {
228 /*
229 * Error return from our internal request sense. This
230 * is bad: we must clear the contingent allegiance
231 * condition otherwise the device will always return
232 * BUSY. Use a big stick.
233 */
234 sym_reset_scsi_target(np, cmd->device->id);
235 cam_status = DID_ERROR;
236 }
237 } else if (cp->host_status == HS_COMPLETE) /* Bad SCSI status */
238 cam_status = DID_OK;
239 else if (cp->host_status == HS_SEL_TIMEOUT) /* Selection timeout */
240 cam_status = DID_NO_CONNECT;
241 else if (cp->host_status == HS_UNEXPECTED) /* Unexpected BUS FREE*/
242 cam_status = DID_ERROR;
243 else { /* Extended error */
244 if (sym_verbose) {
245 sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
246 cp->host_status, cp->ssss_status,
247 cp->xerr_status);
248 }
249 /*
250 * Set the most appropriate value for CAM status.
251 */
252 cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
253 }
938febd6 254 scsi_set_resid(cmd, resid);
1da177e4
LT		 255 cmd->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
256}
257
1da177e4
LT		 258static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
259{
260 int segment;
938febd6 261 int use_sg;
1da177e4
LT		 262
263 cp->data_len = 0;
264
39c05d1e 265 use_sg = scsi_dma_map(cmd);
938febd6
FT		 266 if (use_sg > 0) {
267 struct scatterlist *sg;
53222b90 268 struct sym_tcb *tp = &np->target[cp->target];
1da177e4
LT		 269 struct sym_tblmove *data;
270
271 if (use_sg > SYM_CONF_MAX_SG) {
39c05d1e 272 scsi_dma_unmap(cmd);
1da177e4
LT		 273 return -1;
274 }
275
276 data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
277
938febd6
FT		 278 scsi_for_each_sg(cmd, sg, use_sg, segment) {
279 dma_addr_t baddr = sg_dma_address(sg);
280 unsigned int len = sg_dma_len(sg);
1da177e4 281
53222b90
MW		 282 if ((len & 1) && (tp->head.wval & EWS)) {
283 len++;
284 cp->odd_byte_adjustment++;
285 }
286
1da177e4
LT		 287 sym_build_sge(np, &data[segment], baddr, len);
288 cp->data_len += len;
289 }
290 } else {
291 segment = -2;
292 }
293
294 return segment;
295}
296
297/*
298 * Queue a SCSI command.
299 */
300static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd)
301{
302 struct scsi_device *sdev = cmd->device;
303 struct sym_tcb *tp;
304 struct sym_lcb *lp;
305 struct sym_ccb *cp;
306 int order;
307
1da177e4
LT		 308 /*
309 * Retrieve the target descriptor.
310 */
311 tp = &np->target[sdev->id];
312
1da177e4
LT		 313 /*
314 * Select tagged/untagged.
315 */
316 lp = sym_lp(tp, sdev->lun);
317 order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
318
319 /*
320 * Queue the SCSI IO.
321 */
322 cp = sym_get_ccb(np, cmd, order);
323 if (!cp)
324 return 1; /* Means resource shortage */
325 sym_queue_scsiio(np, cmd, cp);
326 return 0;
327}
328
329/*
330 * Setup buffers and pointers that address the CDB.
331 */
332static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
333{
1da177e4 334 memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len);
1da177e4 335
53222b90
MW		 336 cp->phys.cmd.addr = CCB_BA(cp, cdb_buf[0]);
337 cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
1da177e4
LT		 338
339 return 0;
340}
341
342/*
343 * Setup pointers that address the data and start the I/O.
344 */
345int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
346{
44f30b0f
MW		 347 u32 lastp, goalp;
348 int dir;
1da177e4
LT		 349
350 /*
351 * Build the CDB.
352 */
353 if (sym_setup_cdb(np, cmd, cp))
354 goto out_abort;
355
356 /*
357 * No direction means no data.
358 */
359 dir = cmd->sc_data_direction;
360 if (dir != DMA_NONE) {
361 cp->segments = sym_scatter(np, cp, cmd);
362 if (cp->segments < 0) {
53222b90 363 sym_set_cam_status(cmd, DID_ERROR);
1da177e4
LT		 364 goto out_abort;
365 }
44f30b0f
MW		 366
367 /*
368 * No segments means no data.
369 */
370 if (!cp->segments)
371 dir = DMA_NONE;
1da177e4
LT		 372 } else {
373 cp->data_len = 0;
374 cp->segments = 0;
375 }
376
377 /*
44f30b0f
MW		 378 * Set the data pointer.
379 */
380 switch (dir) {
381 case DMA_BIDIRECTIONAL:
3fb364e0 382 scmd_printk(KERN_INFO, cmd, "got DMA_BIDIRECTIONAL command");
44f30b0f
MW		 383 sym_set_cam_status(cmd, DID_ERROR);
384 goto out_abort;
385 case DMA_TO_DEVICE:
386 goalp = SCRIPTA_BA(np, data_out2) + 8;
387 lastp = goalp - 8 - (cp->segments * (2*4));
388 break;
389 case DMA_FROM_DEVICE:
390 cp->host_flags |= HF_DATA_IN;
391 goalp = SCRIPTA_BA(np, data_in2) + 8;
392 lastp = goalp - 8 - (cp->segments * (2*4));
393 break;
394 case DMA_NONE:
395 default:
396 lastp = goalp = SCRIPTB_BA(np, no_data);
397 break;
398 }
399
400 /*
401 * Set all pointers values needed by SCRIPTS.
1da177e4 402 */
44f30b0f
MW		 403 cp->phys.head.lastp = cpu_to_scr(lastp);
404 cp->phys.head.savep = cpu_to_scr(lastp);
405 cp->startp = cp->phys.head.savep;
406 cp->goalp = cpu_to_scr(goalp);
1da177e4
LT		 407
408 /*
409 * When `#ifed 1', the code below makes the driver
410 * panic on the first attempt to write to a SCSI device.
411 * It is the first test we want to do after a driver
412 * change that does not seem obviously safe. :)
413 */
414#if 0
415 switch (cp->cdb_buf[0]) {
416 case 0x0A: case 0x2A: case 0xAA:
417 panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
418 break;
419 default:
420 break;
421 }
422#endif
423
424 /*
425 * activate this job.
426 */
3bea15a7 427 sym_put_start_queue(np, cp);
1da177e4
LT		 428 return 0;
429
430out_abort:
431 sym_free_ccb(np, cp);
432 sym_xpt_done(np, cmd);
433 return 0;
434}
435
436
437/*
438 * timer daemon.
439 *
440 * Misused to keep the driver running when
441 * interrupts are not configured correctly.
442 */
443static void sym_timer(struct sym_hcb *np)
444{
445 unsigned long thistime = jiffies;
446
447 /*
448 * Restart the timer.
449 */
450 np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
451 add_timer(&np->s.timer);
452
453 /*
454 * If we are resetting the ncr, wait for settle_time before
455 * clearing it. Then command processing will be resumed.
456 */
457 if (np->s.settle_time_valid) {
458 if (time_before_eq(np->s.settle_time, thistime)) {
459 if (sym_verbose >= 2 )
460 printk("%s: command processing resumed\n",
461 sym_name(np));
462 np->s.settle_time_valid = 0;
463 }
464 return;
465 }
466
467 /*
468 * Nothing to do for now, but that may come.
469 */
470 if (np->s.lasttime + 4*HZ < thistime) {
471 np->s.lasttime = thistime;
472 }
473
474#ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
475 /*
476 * Some way-broken PCI bridges may lead to
477 * completions being lost when the clearing
478 * of the INTFLY flag by the CPU occurs
479 * concurrently with the chip raising this flag.
480 * If this ever happen, lost completions will
481 * be reaped here.
482 */
483 sym_wakeup_done(np);
484#endif
485}
486
487
488/*
489 * PCI BUS error handler.
490 */
5111eefa 491void sym_log_bus_error(struct Scsi_Host *shost)
1da177e4 492{
5111eefa
MW		 493 struct sym_data *sym_data = shost_priv(shost);
494 struct pci_dev *pdev = sym_data->pdev;
495 unsigned short pci_sts;
496 pci_read_config_word(pdev, PCI_STATUS, &pci_sts);
1da177e4 497 if (pci_sts & 0xf900) {
5111eefa
MW		 498 pci_write_config_word(pdev, PCI_STATUS, pci_sts);
499 shost_printk(KERN_WARNING, shost,
500 "PCI bus error: status = 0x%04x\n", pci_sts & 0xf900);
1da177e4
LT		 501 }
502}
503
504/*
505 * queuecommand method. Entered with the host adapter lock held and
506 * interrupts disabled.
507 */
f281233d 508static int sym53c8xx_queue_command_lck(struct scsi_cmnd *cmd,
1da177e4
LT		 509 void (*done)(struct scsi_cmnd *))
510{
511 struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
512 struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
513 int sts = 0;
514
71c222dc 515 cmd->scsi_done = done;
1da177e4
LT		 516 memset(ucp, 0, sizeof(*ucp));
517
518 /*
519 * Shorten our settle_time if needed for
520 * this command not to time out.
521 */
242f9dcb
JA		 522 if (np->s.settle_time_valid && cmd->request->timeout) {
523 unsigned long tlimit = jiffies + cmd->request->timeout;
1da177e4
LT		 524 tlimit -= SYM_CONF_TIMER_INTERVAL*2;
525 if (time_after(np->s.settle_time, tlimit)) {
526 np->s.settle_time = tlimit;
527 }
528 }
529
530 if (np->s.settle_time_valid)
531 return SCSI_MLQUEUE_HOST_BUSY;
532
533 sts = sym_queue_command(np, cmd);
534 if (sts)
535 return SCSI_MLQUEUE_HOST_BUSY;
536 return 0;
537}
538
f281233d
JG		 539static DEF_SCSI_QCMD(sym53c8xx_queue_command)
540
1da177e4
LT		 541/*
542 * Linux entry point of the interrupt handler.
543 */
7d12e780 544static irqreturn_t sym53c8xx_intr(int irq, void *dev_id)
1da177e4 545{
99c9e0a1
MW		 546 struct Scsi_Host *shost = dev_id;
547 struct sym_data *sym_data = shost_priv(shost);
548 irqreturn_t result;
1da177e4 549
d68cd759 550 /* Avoid spinloop trying to handle interrupts on frozen device */
99c9e0a1 551 if (pci_channel_offline(sym_data->pdev))
d68cd759
LV		 552 return IRQ_NONE;
553
1da177e4
LT		 554 if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
555
99c9e0a1
MW		 556 spin_lock(shost->host_lock);
557 result = sym_interrupt(shost);
558 spin_unlock(shost->host_lock);
1da177e4
LT		 559
560 if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
561
99c9e0a1 562 return result;
1da177e4
LT		 563}
564
565/*
566 * Linux entry point of the timer handler
567 */
568static void sym53c8xx_timer(unsigned long npref)
569{
570 struct sym_hcb *np = (struct sym_hcb *)npref;
571 unsigned long flags;
572
573 spin_lock_irqsave(np->s.host->host_lock, flags);
574 sym_timer(np);
575 spin_unlock_irqrestore(np->s.host->host_lock, flags);
576}
577
578
579/*
580 * What the eh thread wants us to perform.
581 */
582#define SYM_EH_ABORT 0
583#define SYM_EH_DEVICE_RESET 1
584#define SYM_EH_BUS_RESET 2
585#define SYM_EH_HOST_RESET 3
586
1da177e4
LT		 587/*
588 * Generic method for our eh processing.
589 * The 'op' argument tells what we have to do.
590 */
591static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
592{
b4e93a73 593 struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd);
5111eefa
MW		 594 struct Scsi_Host *shost = cmd->device->host;
595 struct sym_data *sym_data = shost_priv(shost);
596 struct pci_dev *pdev = sym_data->pdev;
597 struct sym_hcb *np = sym_data->ncb;
1da177e4 598 SYM_QUEHEAD *qp;
2ba65367 599 int cmd_queued = 0;
1da177e4 600 int sts = -1;
d637c454 601 struct completion eh_done;
1da177e4 602
5111eefa 603 scmd_printk(KERN_WARNING, cmd, "%s operation started\n", opname);
1da177e4 604
d68cd759
LV		 605 /* We may be in an error condition because the PCI bus
606 * went down. In this case, we need to wait until the
607 * PCI bus is reset, the card is reset, and only then
608 * proceed with the scsi error recovery. There's no
609 * point in hurrying; take a leisurely wait.
610 */
611#define WAIT_FOR_PCI_RECOVERY 35
612 if (pci_channel_offline(pdev)) {
d68cd759
LV		 613 int finished_reset = 0;
614 init_completion(&eh_done);
5111eefa 615 spin_lock_irq(shost->host_lock);
d68cd759
LV		 616 /* Make sure we didn't race */
617 if (pci_channel_offline(pdev)) {
d9aa3af0
KH		 618 BUG_ON(sym_data->io_reset);
619 sym_data->io_reset = &eh_done;
d68cd759 620 } else {
d68cd759 621 finished_reset = 1;
99c9e0a1 622 }
5111eefa 623 spin_unlock_irq(shost->host_lock);
d68cd759 624 if (!finished_reset)
d9aa3af0
KH		 625 finished_reset = wait_for_completion_timeout
626 (sym_data->io_reset,
d68cd759 627 WAIT_FOR_PCI_RECOVERY*HZ);
d9aa3af0
KH		 628 spin_lock_irq(shost->host_lock);
629 sym_data->io_reset = NULL;
630 spin_unlock_irq(shost->host_lock);
d68cd759
LV		 631 if (!finished_reset)
632 return SCSI_FAILED;
633 }
634
5111eefa 635 spin_lock_irq(shost->host_lock);
1da177e4
LT		 636 /* This one is queued in some place -> to wait for completion */
637 FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
638 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
639 if (cp->cmd == cmd) {
2ba65367 640 cmd_queued = 1;
ab19d52b 641 break;
1da177e4
LT		 642 }
643 }
644
1da177e4
LT		 645 /* Try to proceed the operation we have been asked for */
646 sts = -1;
647 switch(op) {
648 case SYM_EH_ABORT:
649 sts = sym_abort_scsiio(np, cmd, 1);
650 break;
651 case SYM_EH_DEVICE_RESET:
652 sts = sym_reset_scsi_target(np, cmd->device->id);
653 break;
654 case SYM_EH_BUS_RESET:
655 sym_reset_scsi_bus(np, 1);
656 sts = 0;
657 break;
658 case SYM_EH_HOST_RESET:
659 sym_reset_scsi_bus(np, 0);
5111eefa 660 sym_start_up(shost, 1);
1da177e4
LT		 661 sts = 0;
662 break;
663 default:
664 break;
665 }
666
667 /* On error, restore everything and cross fingers :) */
2ba65367
MW		 668 if (sts)
669 cmd_queued = 0;
1da177e4 670
2ba65367
MW		 671 if (cmd_queued) {
672 init_completion(&eh_done);
673 ucmd->eh_done = &eh_done;
5111eefa 674 spin_unlock_irq(shost->host_lock);
d637c454 675 if (!wait_for_completion_timeout(&eh_done, 5*HZ)) {
2ba65367 676 ucmd->eh_done = NULL;
1da177e4 677 sts = -2;
b4e93a73 678 }
2ba65367 679 } else {
5111eefa 680 spin_unlock_irq(shost->host_lock);
1da177e4 681 }
2ba65367 682
1da177e4
LT		 683 dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
684 sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
685 return sts ? SCSI_FAILED : SCSI_SUCCESS;
686}
687
688
689/*
690 * Error handlers called from the eh thread (one thread per HBA).
691 */
692static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
693{
ab19d52b 694 return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
1da177e4
LT		 695}
696
697static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
698{
ab19d52b 699 return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
1da177e4
LT		 700}
701
702static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
703{
ab19d52b 704 return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
1da177e4
LT		 705}
706
707static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
708{
ab19d52b 709 return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
1da177e4
LT		 710}
711
712/*
713 * Tune device queuing depth, according to various limits.
714 */
715static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
716{
717 struct sym_lcb *lp = sym_lp(tp, lun);
718 u_short oldtags;
719
720 if (!lp)
721 return;
722
723 oldtags = lp->s.reqtags;
724
725 if (reqtags > lp->s.scdev_depth)
726 reqtags = lp->s.scdev_depth;
727
1da177e4
LT		 728 lp->s.reqtags = reqtags;
729
730 if (reqtags != oldtags) {
53222b90 731 dev_info(&tp->starget->dev,
1da177e4 732 "tagged command queuing %s, command queue depth %d.\n",
3bea15a7 733 lp->s.reqtags ? "enabled" : "disabled", reqtags);
1da177e4
LT		 734 }
735}
736
53222b90 737static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
1da177e4 738{
84e203a2
MW		 739 struct sym_hcb *np = sym_get_hcb(sdev->host);
740 struct sym_tcb *tp = &np->target[sdev->id];
741 struct sym_lcb *lp;
fa858456
AK		 742 unsigned long flags;
743 int error;
1da177e4 744
53222b90
MW		 745 if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
746 return -ENXIO;
1da177e4 747
fa858456
AK		 748 spin_lock_irqsave(np->s.host->host_lock, flags);
749
53222b90
MW		 750 /*
751 * Fail the device init if the device is flagged NOSCAN at BOOT in
752 * the NVRAM. This may speed up boot and maintain coherency with
753 * BIOS device numbering. Clearing the flag allows the user to
754 * rescan skipped devices later. We also return an error for
755 * devices not flagged for SCAN LUNS in the NVRAM since some single
756 * lun devices behave badly when asked for a non zero LUN.
757 */
758
66e8d1cc 759 if (tp->usrflags & SYM_SCAN_BOOT_DISABLED) {
53222b90 760 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
fa858456 761 starget_printk(KERN_INFO, sdev->sdev_target,
66e8d1cc 762 "Scan at boot disabled in NVRAM\n");
fa858456
AK		 763 error = -ENXIO;
764 goto out;
53222b90
MW		 765 }
766
66e8d1cc 767 if (tp->usrflags & SYM_SCAN_LUNS_DISABLED) {
fa858456
AK		 768 if (sdev->lun != 0) {
769 error = -ENXIO;
770 goto out;
771 }
772 starget_printk(KERN_INFO, sdev->sdev_target,
66e8d1cc
MW		 773 "Multiple LUNs disabled in NVRAM\n");
774 }
775
84e203a2 776 lp = sym_alloc_lcb(np, sdev->id, sdev->lun);
fa858456
AK		 777 if (!lp) {
778 error = -ENOMEM;
779 goto out;
780 }
781 if (tp->nlcb == 1)
782 tp->starget = sdev->sdev_target;
84e203a2 783
b37df489
MW		 784 spi_min_period(tp->starget) = tp->usr_period;
785 spi_max_width(tp->starget) = tp->usr_width;
786
fa858456
AK		 787 error = 0;
788out:
789 spin_unlock_irqrestore(np->s.host->host_lock, flags);
790
791 return error;
1da177e4
LT		 792}
793
794/*
795 * Linux entry point for device queue sizing.
796 */
84e203a2 797static int sym53c8xx_slave_configure(struct scsi_device *sdev)
1da177e4 798{
84e203a2
MW		 799 struct sym_hcb *np = sym_get_hcb(sdev->host);
800 struct sym_tcb *tp = &np->target[sdev->id];
801 struct sym_lcb *lp = sym_lp(tp, sdev->lun);
1da177e4
LT		 802 int reqtags, depth_to_use;
803
1da177e4
LT		 804 /*
805 * Get user flags.
806 */
807 lp->curr_flags = lp->user_flags;
808
809 /*
810 * Select queue depth from driver setup.
c2fd206e
TB		 811 * Do not use more than configured by user.
812 * Use at least 1.
813 * Do not use more than our maximum.
1da177e4 814 */
a44131b3 815 reqtags = sym_driver_setup.max_tag;
1da177e4
LT		 816 if (reqtags > tp->usrtags)
817 reqtags = tp->usrtags;
84e203a2 818 if (!sdev->tagged_supported)
1da177e4 819 reqtags = 0;
1da177e4
LT		 820 if (reqtags > SYM_CONF_MAX_TAG)
821 reqtags = SYM_CONF_MAX_TAG;
c2fd206e 822 depth_to_use = reqtags ? reqtags : 1;
84e203a2 823 scsi_adjust_queue_depth(sdev,
a44131b3 824 sdev->tagged_supported ? MSG_SIMPLE_TAG : 0,
1da177e4
LT		 825 depth_to_use);
826 lp->s.scdev_depth = depth_to_use;
84e203a2 827 sym_tune_dev_queuing(tp, sdev->lun, reqtags);
1da177e4 828
84e203a2
MW		 829 if (!spi_initial_dv(sdev->sdev_target))
830 spi_dv_device(sdev);
1da177e4
LT		 831
832 return 0;
833}
834
84e203a2
MW		 835static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
836{
837 struct sym_hcb *np = sym_get_hcb(sdev->host);
fa858456
AK		 838 struct sym_tcb *tp = &np->target[sdev->id];
839 struct sym_lcb *lp = sym_lp(tp, sdev->lun);
840 unsigned long flags;
84e203a2 841
fa858456
AK		 842 spin_lock_irqsave(np->s.host->host_lock, flags);
843
844 if (lp->busy_itlq || lp->busy_itl) {
845 /*
846 * This really shouldn't happen, but we can't return an error
847 * so let's try to stop all on-going I/O.
848 */
849 starget_printk(KERN_WARNING, tp->starget,
850 "Removing busy LCB (%d)\n", sdev->lun);
851 sym_reset_scsi_bus(np, 1);
852 }
853
854 if (sym_free_lcb(np, sdev->id, sdev->lun) == 0) {
855 /*
856 * It was the last unit for this target.
857 */
858 tp->head.sval = 0;
859 tp->head.wval = np->rv_scntl3;
860 tp->head.uval = 0;
861 tp->tgoal.check_nego = 1;
862 tp->starget = NULL;
863 }
864
865 spin_unlock_irqrestore(np->s.host->host_lock, flags);
84e203a2
MW		 866}
867
1da177e4
LT		 868/*
869 * Linux entry point for info() function
870 */
871static const char *sym53c8xx_info (struct Scsi_Host *host)
872{
873 return SYM_DRIVER_NAME;
874}
875
876
877#ifdef SYM_LINUX_PROC_INFO_SUPPORT
878/*
879 * Proc file system stuff
880 *
881 * A read operation returns adapter information.
882 * A write operation is a control command.
883 * The string is parsed in the driver code and the command is passed
884 * to the sym_usercmd() function.
885 */
886
887#ifdef SYM_LINUX_USER_COMMAND_SUPPORT
888
889struct sym_usrcmd {
890 u_long target;
891 u_long lun;
892 u_long data;
893 u_long cmd;
894};
895
896#define UC_SETSYNC 10
897#define UC_SETTAGS 11
898#define UC_SETDEBUG 12
899#define UC_SETWIDE 14
900#define UC_SETFLAG 15
901#define UC_SETVERBOSE 17
902#define UC_RESETDEV 18
903#define UC_CLEARDEV 19
904
905static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
906{
907 struct sym_tcb *tp;
908 int t, l;
909
910 switch (uc->cmd) {
911 case 0: return;
912
913#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
914 case UC_SETDEBUG:
915 sym_debug_flags = uc->data;
916 break;
917#endif
918 case UC_SETVERBOSE:
919 np->verbose = uc->data;
920 break;
921 default:
922 /*
923 * We assume that other commands apply to targets.
924 * This should always be the case and avoid the below
925 * 4 lines to be repeated 6 times.
926 */
927 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
928 if (!((uc->target >> t) & 1))
929 continue;
930 tp = &np->target[t];
fa858456
AK		 931 if (!tp->nlcb)
932 continue;
1da177e4
LT		 933
934 switch (uc->cmd) {
935
936 case UC_SETSYNC:
937 if (!uc->data || uc->data >= 255) {
938 tp->tgoal.iu = tp->tgoal.dt =
939 tp->tgoal.qas = 0;
940 tp->tgoal.offset = 0;
941 } else if (uc->data <= 9 && np->minsync_dt) {
942 if (uc->data < np->minsync_dt)
943 uc->data = np->minsync_dt;
944 tp->tgoal.iu = tp->tgoal.dt =
945 tp->tgoal.qas = 1;
946 tp->tgoal.width = 1;
947 tp->tgoal.period = uc->data;
948 tp->tgoal.offset = np->maxoffs_dt;
949 } else {
950 if (uc->data < np->minsync)
951 uc->data = np->minsync;
952 tp->tgoal.iu = tp->tgoal.dt =
953 tp->tgoal.qas = 0;
954 tp->tgoal.period = uc->data;
955 tp->tgoal.offset = np->maxoffs;
956 }
957 tp->tgoal.check_nego = 1;
958 break;
959 case UC_SETWIDE:
960 tp->tgoal.width = uc->data ? 1 : 0;
961 tp->tgoal.check_nego = 1;
962 break;
963 case UC_SETTAGS:
964 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
965 sym_tune_dev_queuing(tp, l, uc->data);
966 break;
967 case UC_RESETDEV:
968 tp->to_reset = 1;
969 np->istat_sem = SEM;
970 OUTB(np, nc_istat, SIGP|SEM);
971 break;
972 case UC_CLEARDEV:
973 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
974 struct sym_lcb *lp = sym_lp(tp, l);
975 if (lp) lp->to_clear = 1;
976 }
977 np->istat_sem = SEM;
978 OUTB(np, nc_istat, SIGP|SEM);
979 break;
980 case UC_SETFLAG:
981 tp->usrflags = uc->data;
982 break;
983 }
984 }
985 break;
986 }
987}
988
4e62b093 989static int sym_skip_spaces(char *ptr, int len)
1da177e4
LT		 990{
991 int cnt, c;
992
993 for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
994
995 return (len - cnt);
996}
997
998static int get_int_arg(char *ptr, int len, u_long *pv)
999{
1000 char *end;
1001
1002 *pv = simple_strtoul(ptr, &end, 10);
1003 return (end - ptr);
1004}
1005
1006static int is_keyword(char *ptr, int len, char *verb)
1007{
1008 int verb_len = strlen(verb);
1009
1010 if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1011 return verb_len;
1012 else
1013 return 0;
1014}
1015
1016#define SKIP_SPACES(ptr, len) \
4e62b093 1017 if ((arg_len = sym_skip_spaces(ptr, len)) < 1) \
1da177e4
LT		 1018 return -EINVAL; \
1019 ptr += arg_len; len -= arg_len;
1020
1021#define GET_INT_ARG(ptr, len, v) \
1022 if (!(arg_len = get_int_arg(ptr, len, &(v)))) \
1023 return -EINVAL; \
1024 ptr += arg_len; len -= arg_len;
1025
1026
1027/*
1028 * Parse a control command
1029 */
1030
5111eefa 1031static int sym_user_command(struct Scsi_Host *shost, char *buffer, int length)
1da177e4 1032{
5111eefa 1033 struct sym_hcb *np = sym_get_hcb(shost);
1da177e4
LT		 1034 char *ptr = buffer;
1035 int len = length;
1036 struct sym_usrcmd cmd, *uc = &cmd;
1037 int arg_len;
1038 u_long target;
1039
1040 memset(uc, 0, sizeof(*uc));
1041
1042 if (len > 0 && ptr[len-1] == '\n')
1043 --len;
1044
1045 if ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1046 uc->cmd = UC_SETSYNC;
1047 else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1048 uc->cmd = UC_SETTAGS;
1049 else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1050 uc->cmd = UC_SETVERBOSE;
1051 else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1052 uc->cmd = UC_SETWIDE;
1053#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1054 else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1055 uc->cmd = UC_SETDEBUG;
1056#endif
1057 else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1058 uc->cmd = UC_SETFLAG;
1059 else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1060 uc->cmd = UC_RESETDEV;
1061 else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1062 uc->cmd = UC_CLEARDEV;
1063 else
1064 arg_len = 0;
1065
1066#ifdef DEBUG_PROC_INFO
1067printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1068#endif
1069
1070 if (!arg_len)
1071 return -EINVAL;
1072 ptr += arg_len; len -= arg_len;
1073
1074 switch(uc->cmd) {
1075 case UC_SETSYNC:
1076 case UC_SETTAGS:
1077 case UC_SETWIDE:
1078 case UC_SETFLAG:
1079 case UC_RESETDEV:
1080 case UC_CLEARDEV:
1081 SKIP_SPACES(ptr, len);
1082 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1083 ptr += arg_len; len -= arg_len;
1084 uc->target = ~0;
1085 } else {
1086 GET_INT_ARG(ptr, len, target);
1087 uc->target = (1<<target);
1088#ifdef DEBUG_PROC_INFO
1089printk("sym_user_command: target=%ld\n", target);
1090#endif
1091 }
1092 break;
1093 }
1094
1095 switch(uc->cmd) {
1096 case UC_SETVERBOSE:
1097 case UC_SETSYNC:
1098 case UC_SETTAGS:
1099 case UC_SETWIDE:
1100 SKIP_SPACES(ptr, len);
1101 GET_INT_ARG(ptr, len, uc->data);
1102#ifdef DEBUG_PROC_INFO
1103printk("sym_user_command: data=%ld\n", uc->data);
1104#endif
1105 break;
1106#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1107 case UC_SETDEBUG:
1108 while (len > 0) {
1109 SKIP_SPACES(ptr, len);
1110 if ((arg_len = is_keyword(ptr, len, "alloc")))
1111 uc->data |= DEBUG_ALLOC;
1112 else if ((arg_len = is_keyword(ptr, len, "phase")))
1113 uc->data |= DEBUG_PHASE;
1114 else if ((arg_len = is_keyword(ptr, len, "queue")))
1115 uc->data |= DEBUG_QUEUE;
1116 else if ((arg_len = is_keyword(ptr, len, "result")))
1117 uc->data |= DEBUG_RESULT;
1118 else if ((arg_len = is_keyword(ptr, len, "scatter")))
1119 uc->data |= DEBUG_SCATTER;
1120 else if ((arg_len = is_keyword(ptr, len, "script")))
1121 uc->data |= DEBUG_SCRIPT;
1122 else if ((arg_len = is_keyword(ptr, len, "tiny")))
1123 uc->data |= DEBUG_TINY;
1124 else if ((arg_len = is_keyword(ptr, len, "timing")))
1125 uc->data |= DEBUG_TIMING;
1126 else if ((arg_len = is_keyword(ptr, len, "nego")))
1127 uc->data |= DEBUG_NEGO;
1128 else if ((arg_len = is_keyword(ptr, len, "tags")))
1129 uc->data |= DEBUG_TAGS;
1130 else if ((arg_len = is_keyword(ptr, len, "pointer")))
1131 uc->data |= DEBUG_POINTER;
1132 else
1133 return -EINVAL;
1134 ptr += arg_len; len -= arg_len;
1135 }
1136#ifdef DEBUG_PROC_INFO
1137printk("sym_user_command: data=%ld\n", uc->data);
1138#endif
1139 break;
1140#endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1141 case UC_SETFLAG:
1142 while (len > 0) {
1143 SKIP_SPACES(ptr, len);
1144 if ((arg_len = is_keyword(ptr, len, "no_disc")))
1145 uc->data &= ~SYM_DISC_ENABLED;
1146 else
1147 return -EINVAL;
1148 ptr += arg_len; len -= arg_len;
1149 }
1150 break;
1151 default:
1152 break;
1153 }
1154
1155 if (len)
1156 return -EINVAL;
1157 else {
1158 unsigned long flags;
1159
5111eefa
MW		 1160 spin_lock_irqsave(shost->host_lock, flags);
1161 sym_exec_user_command(np, uc);
1162 spin_unlock_irqrestore(shost->host_lock, flags);
1da177e4
LT		 1163 }
1164 return length;
1165}
1166
1167#endif /* SYM_LINUX_USER_COMMAND_SUPPORT */
1168
1169
1170#ifdef SYM_LINUX_USER_INFO_SUPPORT
1171/*
1172 * Informations through the proc file system.
1173 */
1174struct info_str {
1175 char *buffer;
1176 int length;
1177 int offset;
1178 int pos;
1179};
1180
1181static void copy_mem_info(struct info_str *info, char *data, int len)
1182{
1183 if (info->pos + len > info->length)
1184 len = info->length - info->pos;
1185
1186 if (info->pos + len < info->offset) {
1187 info->pos += len;
1188 return;
1189 }
1190 if (info->pos < info->offset) {
1191 data += (info->offset - info->pos);
1192 len -= (info->offset - info->pos);
1193 }
1194
1195 if (len > 0) {
1196 memcpy(info->buffer + info->pos, data, len);
1197 info->pos += len;
1198 }
1199}
1200
1201static int copy_info(struct info_str *info, char *fmt, ...)
1202{
1203 va_list args;
1204 char buf[81];
1205 int len;
1206
1207 va_start(args, fmt);
1208 len = vsprintf(buf, fmt, args);
1209 va_end(args);
1210
1211 copy_mem_info(info, buf, len);
1212 return len;
1213}
1214
1215/*
1216 * Copy formatted information into the input buffer.
1217 */
5111eefa 1218static int sym_host_info(struct Scsi_Host *shost, char *ptr, off_t offset, int len)
1da177e4 1219{
5111eefa
MW		 1220 struct sym_data *sym_data = shost_priv(shost);
1221 struct pci_dev *pdev = sym_data->pdev;
1222 struct sym_hcb *np = sym_data->ncb;
1da177e4
LT		 1223 struct info_str info;
1224
1225 info.buffer = ptr;
1226 info.length = len;
1227 info.offset = offset;
1228 info.pos = 0;
1229
1230 copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
bd678450 1231 "revision id 0x%x\n", np->s.chip_name,
5111eefa 1232 pdev->device, pdev->revision);
8022fbda 1233 copy_info(&info, "At PCI address %s, IRQ %u\n",
5111eefa 1234 pci_name(pdev), pdev->irq);
1da177e4
LT		 1235 copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1236 (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1237 np->maxwide ? "Wide" : "Narrow",
1238 np->minsync_dt ? ", DT capable" : "");
1239
1240 copy_info(&info, "Max. started commands %d, "
1241 "max. commands per LUN %d\n",
1242 SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1243
1244 return info.pos > info.offset? info.pos - info.offset : 0;
1245}
1246#endif /* SYM_LINUX_USER_INFO_SUPPORT */
1247
1248/*
1249 * Entry point of the scsi proc fs of the driver.
1250 * - func = 0 means read (returns adapter infos)
1251 * - func = 1 means write (not yet merget from sym53c8xx)
1252 */
5111eefa 1253static int sym53c8xx_proc_info(struct Scsi_Host *shost, char *buffer,
1da177e4
LT		 1254 char **start, off_t offset, int length, int func)
1255{
1da177e4
LT		 1256 int retv;
1257
1258 if (func) {
1259#ifdef SYM_LINUX_USER_COMMAND_SUPPORT
5111eefa 1260 retv = sym_user_command(shost, buffer, length);
1da177e4
LT		 1261#else
1262 retv = -EINVAL;
1263#endif
1264 } else {
1265 if (start)
1266 *start = buffer;
1267#ifdef SYM_LINUX_USER_INFO_SUPPORT
5111eefa 1268 retv = sym_host_info(shost, buffer, offset, length);
1da177e4
LT		 1269#else
1270 retv = -EINVAL;
1271#endif
1272 }
1273
1274 return retv;
1275}
1276#endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1277
a71d035d 1278/*
783fa731 1279 * Free resources claimed by sym_iomap_device(). Note that
a71d035d
TB		 1280 * sym_free_resources() should be used instead of this function after calling
1281 * sym_attach().
1282 */
1283static void __devinit
1284sym_iounmap_device(struct sym_device *device)
1285{
1286 if (device->s.ioaddr)
1287 pci_iounmap(device->pdev, device->s.ioaddr);
1288 if (device->s.ramaddr)
1289 pci_iounmap(device->pdev, device->s.ramaddr);
1290}
1291
1da177e4
LT		 1292/*
1293 * Free controller resources.
1294 */
b409063a
TB		 1295static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev,
1296 int do_free_irq)
1da177e4
LT		 1297{
1298 /*
1299 * Free O/S specific resources.
1300 */
b409063a 1301 if (do_free_irq)
7ee2413c 1302 free_irq(pdev->irq, np->s.host);
1da177e4
LT		 1303 if (np->s.ioaddr)
1304 pci_iounmap(pdev, np->s.ioaddr);
1305 if (np->s.ramaddr)
1306 pci_iounmap(pdev, np->s.ramaddr);
1307 /*
1308 * Free O/S independent resources.
1309 */
1310 sym_hcb_free(np);
1311
1312 sym_mfree_dma(np, sizeof(*np), "HCB");
1313}
1314
1da177e4
LT		 1315/*
1316 * Host attach and initialisations.
1317 *
1318 * Allocate host data and ncb structure.
1319 * Remap MMIO region.
1320 * Do chip initialization.
1321 * If all is OK, install interrupt handling and
1322 * start the timer daemon.
1323 */
1324static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1325 int unit, struct sym_device *dev)
1326{
99c9e0a1 1327 struct sym_data *sym_data;
1da177e4 1328 struct sym_hcb *np = NULL;
a71d035d 1329 struct Scsi_Host *shost = NULL;
1da177e4
LT		 1330 struct pci_dev *pdev = dev->pdev;
1331 unsigned long flags;
1332 struct sym_fw *fw;
b409063a 1333 int do_free_irq = 0;
1da177e4 1334
8022fbda 1335 printk(KERN_INFO "sym%d: <%s> rev 0x%x at pci %s irq %u\n",
bd678450 1336 unit, dev->chip.name, pdev->revision, pci_name(pdev),
8022fbda 1337 pdev->irq);
1da177e4
LT		 1338
1339 /*
1340 * Get the firmware for this chip.
1341 */
1342 fw = sym_find_firmware(&dev->chip);
1343 if (!fw)
a71d035d 1344 goto attach_failed;
1da177e4 1345
99c9e0a1
MW		 1346 shost = scsi_host_alloc(tpnt, sizeof(*sym_data));
1347 if (!shost)
a71d035d 1348 goto attach_failed;
99c9e0a1 1349 sym_data = shost_priv(shost);
1da177e4
LT		 1350
1351 /*
1352 * Allocate immediately the host control block,
1353 * since we are only expecting to succeed. :)
1354 * We keep track in the HCB of all the resources that
1355 * are to be released on error.
1356 */
1357 np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1358 if (!np)
1359 goto attach_failed;
1da177e4 1360 np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
99c9e0a1
MW		 1361 sym_data->ncb = np;
1362 sym_data->pdev = pdev;
1363 np->s.host = shost;
1da177e4 1364
5111eefa 1365 pci_set_drvdata(pdev, shost);
1da177e4
LT		 1366
1367 /*
1368 * Copy some useful infos to the HCB.
1369 */
1370 np->hcb_ba = vtobus(np);
1371 np->verbose = sym_driver_setup.verbose;
1da177e4 1372 np->s.unit = unit;
1da177e4
LT		 1373 np->features = dev->chip.features;
1374 np->clock_divn = dev->chip.nr_divisor;
1375 np->maxoffs = dev->chip.offset_max;
1376 np->maxburst = dev->chip.burst_max;
1377 np->myaddr = dev->host_id;
a71d035d 1378 np->mmio_ba = (u32)dev->mmio_base;
783fa731 1379 np->ram_ba = (u32)dev->ram_base;
a71d035d
TB		 1380 np->s.ioaddr = dev->s.ioaddr;
1381 np->s.ramaddr = dev->s.ramaddr;
1da177e4
LT		 1382
1383 /*
1384 * Edit its name.
1385 */
1386 strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1387 sprintf(np->s.inst_name, "sym%d", np->s.unit);
1388
4d85b471 1389 if ((SYM_CONF_DMA_ADDRESSING_MODE > 0) && (np->features & FE_DAC) &&
5111eefa 1390 !pci_set_dma_mask(pdev, DMA_DAC_MASK)) {
4d85b471 1391 set_dac(np);
284901a9 1392 } else if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
4d85b471 1393 printf_warning("%s: No suitable DMA available\n", sym_name(np));
1da177e4 1394 goto attach_failed;
4d85b471 1395 }
1da177e4 1396
99c9e0a1 1397 if (sym_hcb_attach(shost, fw, dev->nvram))
1da177e4
LT		 1398 goto attach_failed;
1399
1400 /*
1401 * Install the interrupt handler.
1402 * If we synchonize the C code with SCRIPTS on interrupt,
1403 * we do not want to share the INTR line at all.
1404 */
99c9e0a1
MW		 1405 if (request_irq(pdev->irq, sym53c8xx_intr, IRQF_SHARED, NAME53C8XX,
1406 shost)) {
8022fbda 1407 printf_err("%s: request irq %u failure\n",
1da177e4
LT		 1408 sym_name(np), pdev->irq);
1409 goto attach_failed;
1410 }
b409063a 1411 do_free_irq = 1;
1da177e4
LT		 1412
1413 /*
1414 * After SCSI devices have been opened, we cannot
1415 * reset the bus safely, so we do it here.
1416 */
99c9e0a1 1417 spin_lock_irqsave(shost->host_lock, flags);
1da177e4
LT		 1418 if (sym_reset_scsi_bus(np, 0))
1419 goto reset_failed;
1420
1421 /*
1422 * Start the SCRIPTS.
1423 */
5111eefa 1424 sym_start_up(shost, 1);
1da177e4
LT		 1425
1426 /*
1427 * Start the timer daemon
1428 */
1429 init_timer(&np->s.timer);
1430 np->s.timer.data = (unsigned long) np;
1431 np->s.timer.function = sym53c8xx_timer;
1432 np->s.lasttime=0;
1433 sym_timer (np);
1434
1435 /*
1436 * Fill Linux host instance structure
1437 * and return success.
1438 */
99c9e0a1
MW		 1439 shost->max_channel = 0;
1440 shost->this_id = np->myaddr;
1441 shost->max_id = np->maxwide ? 16 : 8;
1442 shost->max_lun = SYM_CONF_MAX_LUN;
1443 shost->unique_id = pci_resource_start(pdev, 0);
1444 shost->cmd_per_lun = SYM_CONF_MAX_TAG;
1445 shost->can_queue = (SYM_CONF_MAX_START-2);
1446 shost->sg_tablesize = SYM_CONF_MAX_SG;
1447 shost->max_cmd_len = 16;
1da177e4 1448 BUG_ON(sym2_transport_template == NULL);
99c9e0a1 1449 shost->transportt = sym2_transport_template;
1da177e4 1450
34996acc 1451 /* 53c896 rev 1 errata: DMA may not cross 16MB boundary */
bd678450 1452 if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 2)
99c9e0a1 1453 shost->dma_boundary = 0xFFFFFF;
34996acc 1454
99c9e0a1 1455 spin_unlock_irqrestore(shost->host_lock, flags);
1da177e4 1456
99c9e0a1 1457 return shost;
1da177e4
LT		 1458
1459 reset_failed:
1460 printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1461 "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
99c9e0a1 1462 spin_unlock_irqrestore(shost->host_lock, flags);
1da177e4 1463 attach_failed:
07b9d81e 1464 printf_info("sym%d: giving up ...\n", unit);
1da177e4 1465 if (np)
b409063a 1466 sym_free_resources(np, pdev, do_free_irq);
a71d035d
TB		 1467 else
1468 sym_iounmap_device(dev);
1469 if (shost)
1470 scsi_host_put(shost);
1da177e4
LT		 1471
1472 return NULL;
1473 }
1474
1475
1476/*
1477 * Detect and try to read SYMBIOS and TEKRAM NVRAM.
1478 */
1479#if SYM_CONF_NVRAM_SUPPORT
1480static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1481{
1482 devp->nvram = nvp;
1da177e4
LT		 1483 nvp->type = 0;
1484
1485 sym_read_nvram(devp, nvp);
1486}
1487#else
1488static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1489{
1490}
1491#endif /* SYM_CONF_NVRAM_SUPPORT */
1492
1493static int __devinit sym_check_supported(struct sym_device *device)
1494{
1495 struct sym_chip *chip;
1496 struct pci_dev *pdev = device->pdev;
1da177e4
LT		 1497 unsigned long io_port = pci_resource_start(pdev, 0);
1498 int i;
1499
1500 /*
1501 * If user excluded this chip, do not initialize it.
1502 * I hate this code so much. Must kill it.
1503 */
1504 if (io_port) {
1505 for (i = 0 ; i < 8 ; i++) {
1506 if (sym_driver_setup.excludes[i] == io_port)
1507 return -ENODEV;
1508 }
1509 }
1510
1511 /*
1512 * Check if the chip is supported. Then copy the chip description
1513 * to our device structure so we can make it match the actual device
1514 * and options.
1515 */
bd678450 1516 chip = sym_lookup_chip_table(pdev->device, pdev->revision);
1da177e4
LT		 1517 if (!chip) {
1518 dev_info(&pdev->dev, "device not supported\n");
1519 return -ENODEV;
1520 }
1521 memcpy(&device->chip, chip, sizeof(device->chip));
1da177e4
LT		 1522
1523 return 0;
1524}
1525
1526/*
1527 * Ignore Symbios chips controlled by various RAID controllers.
1528 * These controllers set value 0x52414944 at RAM end - 16.
1529 */
1530static int __devinit sym_check_raid(struct sym_device *device)
1531{
1532 unsigned int ram_size, ram_val;
1533
1534 if (!device->s.ramaddr)
1535 return 0;
1536
1537 if (device->chip.features & FE_RAM8K)
1538 ram_size = 8192;
1539 else
1540 ram_size = 4096;
1541
1542 ram_val = readl(device->s.ramaddr + ram_size - 16);
1543 if (ram_val != 0x52414944)
1544 return 0;
1545
1546 dev_info(&device->pdev->dev,
1547 "not initializing, driven by RAID controller.\n");
1548 return -ENODEV;
1549}
1550
1551static int __devinit sym_set_workarounds(struct sym_device *device)
1552{
1553 struct sym_chip *chip = &device->chip;
1554 struct pci_dev *pdev = device->pdev;
1555 u_short status_reg;
1556
1557 /*
1558 * (ITEM 12 of a DEL about the 896 I haven't yet).
1559 * We must ensure the chip will use WRITE AND INVALIDATE.
1560 * The revision number limit is for now arbitrary.
1561 */
bd678450 1562 if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 0x4) {
1da177e4
LT		 1563 chip->features |= (FE_WRIE | FE_CLSE);
1564 }
1565
1566 /* If the chip can do Memory Write Invalidate, enable it */
1567 if (chip->features & FE_WRIE) {
1568 if (pci_set_mwi(pdev))
1569 return -ENODEV;
1570 }
1571
1572 /*
1573 * Work around for errant bit in 895A. The 66Mhz
1574 * capable bit is set erroneously. Clear this bit.
1575 * (Item 1 DEL 533)
1576 *
1577 * Make sure Config space and Features agree.
1578 *
1579 * Recall: writes are not normal to status register -
1580 * write a 1 to clear and a 0 to leave unchanged.
1581 * Can only reset bits.
1582 */
1583 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1584 if (chip->features & FE_66MHZ) {
1585 if (!(status_reg & PCI_STATUS_66MHZ))
1586 chip->features &= ~FE_66MHZ;
1587 } else {
1588 if (status_reg & PCI_STATUS_66MHZ) {
1589 status_reg = PCI_STATUS_66MHZ;
1590 pci_write_config_word(pdev, PCI_STATUS, status_reg);
1591 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1592 }
1593 }
1594
1595 return 0;
1596}
1597
1598/*
783fa731 1599 * Map HBA registers and on-chip SRAM (if present).
1da177e4 1600 */
783fa731
TB		 1601static int __devinit
1602sym_iomap_device(struct sym_device *device)
1da177e4 1603{
783fa731 1604 struct pci_dev *pdev = device->pdev;
b6d105d7 1605 struct pci_bus_region bus_addr;
783fa731 1606 int i = 2;
1da177e4 1607
b6d105d7
MW		 1608 pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[1]);
1609 device->mmio_base = bus_addr.start;
1610
783fa731
TB		 1611 if (device->chip.features & FE_RAM) {
1612 /*
1613 * If the BAR is 64-bit, resource 2 will be occupied by the
1614 * upper 32 bits
1615 */
1616 if (!pdev->resource[i].flags)
1617 i++;
1618 pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[i]);
1619 device->ram_base = bus_addr.start;
1620 }
1da177e4 1621
1f61d824 1622#ifdef CONFIG_SCSI_SYM53C8XX_MMIO
1da177e4
LT		 1623 if (device->mmio_base)
1624 device->s.ioaddr = pci_iomap(pdev, 1,
1625 pci_resource_len(pdev, 1));
1626#endif
1627 if (!device->s.ioaddr)
1628 device->s.ioaddr = pci_iomap(pdev, 0,
1629 pci_resource_len(pdev, 0));
783fa731
TB		 1630 if (!device->s.ioaddr) {
1631 dev_err(&pdev->dev, "could not map registers; giving up.\n");
1632 return -EIO;
1633 }
1634 if (device->ram_base) {
1da177e4
LT		 1635 device->s.ramaddr = pci_iomap(pdev, i,
1636 pci_resource_len(pdev, i));
783fa731
TB		 1637 if (!device->s.ramaddr) {
1638 dev_warn(&pdev->dev,
1639 "could not map SRAM; continuing anyway.\n");
1640 device->ram_base = 0;
1641 }
1642 }
1643
1644 return 0;
1da177e4
LT		 1645}
1646
1647/*
1648 * The NCR PQS and PDS cards are constructed as a DEC bridge
1649 * behind which sits a proprietary NCR memory controller and
1650 * either four or two 53c875s as separate devices. We can tell
1651 * if an 875 is part of a PQS/PDS or not since if it is, it will
1652 * be on the same bus as the memory controller. In its usual
1653 * mode of operation, the 875s are slaved to the memory
1654 * controller for all transfers. To operate with the Linux
1655 * driver, the memory controller is disabled and the 875s
1656 * freed to function independently. The only wrinkle is that
1657 * the preset SCSI ID (which may be zero) must be read in from
1658 * a special configuration space register of the 875.
1659 */
1660static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1661{
1662 int slot;
1663 u8 tmp;
1664
1665 for (slot = 0; slot < 256; slot++) {
1666 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1667
1668 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1669 pci_dev_put(memc);
1670 continue;
1671 }
1672
1673 /* bit 1: allow individual 875 configuration */
1674 pci_read_config_byte(memc, 0x44, &tmp);
1675 if ((tmp & 0x2) == 0) {
1676 tmp |= 0x2;
1677 pci_write_config_byte(memc, 0x44, tmp);
1678 }
1679
1680 /* bit 2: drive individual 875 interrupts to the bus */
1681 pci_read_config_byte(memc, 0x45, &tmp);
1682 if ((tmp & 0x4) == 0) {
1683 tmp |= 0x4;
1684 pci_write_config_byte(memc, 0x45, tmp);
1685 }
1686
1687 pci_dev_put(memc);
1688 break;
1689 }
1690
1691 pci_read_config_byte(pdev, 0x84, &tmp);
1692 sym_dev->host_id = tmp;
1693}
1694
1695/*
1696 * Called before unloading the module.
1697 * Detach the host.
1698 * We have to free resources and halt the NCR chip.
1699 */
5111eefa 1700static int sym_detach(struct Scsi_Host *shost, struct pci_dev *pdev)
1da177e4 1701{
5111eefa 1702 struct sym_hcb *np = sym_get_hcb(shost);
1da177e4
LT		 1703 printk("%s: detaching ...\n", sym_name(np));
1704
1705 del_timer_sync(&np->s.timer);
1706
1707 /*
1708 * Reset NCR chip.
1709 * We should use sym_soft_reset(), but we don't want to do
1710 * so, since we may not be safe if interrupts occur.
1711 */
1712 printk("%s: resetting chip\n", sym_name(np));
1713 OUTB(np, nc_istat, SRST);
53222b90 1714 INB(np, nc_mbox1);
1da177e4
LT		 1715 udelay(10);
1716 OUTB(np, nc_istat, 0);
1717
b409063a 1718 sym_free_resources(np, pdev, 1);
d3ce65d1 1719 scsi_host_put(shost);
1da177e4
LT		 1720
1721 return 1;
1722}
1723
1724/*
1725 * Driver host template.
1726 */
1727static struct scsi_host_template sym2_template = {
1728 .module = THIS_MODULE,
1729 .name = "sym53c8xx",
1730 .info = sym53c8xx_info,
1731 .queuecommand = sym53c8xx_queue_command,
1732 .slave_alloc = sym53c8xx_slave_alloc,
1733 .slave_configure = sym53c8xx_slave_configure,
84e203a2 1734 .slave_destroy = sym53c8xx_slave_destroy,
1da177e4
LT		 1735 .eh_abort_handler = sym53c8xx_eh_abort_handler,
1736 .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1737 .eh_bus_reset_handler = sym53c8xx_eh_bus_reset_handler,
1738 .eh_host_reset_handler = sym53c8xx_eh_host_reset_handler,
1739 .this_id = 7,
14ac8bf5
MW		 1740 .use_clustering = ENABLE_CLUSTERING,
1741 .max_sectors = 0xFFFF,
1da177e4
LT		 1742#ifdef SYM_LINUX_PROC_INFO_SUPPORT
1743 .proc_info = sym53c8xx_proc_info,
1744 .proc_name = NAME53C8XX,
1745#endif
1746};
1747
1748static int attach_count;
1749
1750static int __devinit sym2_probe(struct pci_dev *pdev,
1751 const struct pci_device_id *ent)
1752{
1753 struct sym_device sym_dev;
1754 struct sym_nvram nvram;
99c9e0a1 1755 struct Scsi_Host *shost;
a71d035d
TB		 1756 int do_iounmap = 0;
1757 int do_disable_device = 1;
1da177e4
LT		 1758
1759 memset(&sym_dev, 0, sizeof(sym_dev));
1760 memset(&nvram, 0, sizeof(nvram));
783fa731
TB		 1761 sym_dev.pdev = pdev;
1762 sym_dev.host_id = SYM_SETUP_HOST_ID;
1da177e4
LT		 1763
1764 if (pci_enable_device(pdev))
1765 goto leave;
1766
1767 pci_set_master(pdev);
1768
1769 if (pci_request_regions(pdev, NAME53C8XX))
1770 goto disable;
1771
1da177e4
LT		 1772 if (sym_check_supported(&sym_dev))
1773 goto free;
1774
783fa731
TB		 1775 if (sym_iomap_device(&sym_dev))
1776 goto free;
1777 do_iounmap = 1;
1778
a71d035d
TB		 1779 if (sym_check_raid(&sym_dev)) {
1780 do_disable_device = 0; /* Don't disable the device */
1781 goto free;
1782 }
1da177e4
LT		 1783
1784 if (sym_set_workarounds(&sym_dev))
1785 goto free;
1786
1787 sym_config_pqs(pdev, &sym_dev);
1788
1789 sym_get_nvram(&sym_dev, &nvram);
1790
a71d035d 1791 do_iounmap = 0; /* Don't sym_iounmap_device() after sym_attach(). */
99c9e0a1
MW		 1792 shost = sym_attach(&sym2_template, attach_count, &sym_dev);
1793 if (!shost)
1da177e4
LT		 1794 goto free;
1795
99c9e0a1 1796 if (scsi_add_host(shost, &pdev->dev))
1da177e4 1797 goto detach;
99c9e0a1 1798 scsi_scan_host(shost);
1da177e4
LT		 1799
1800 attach_count++;
1801
1802 return 0;
1803
1804 detach:
1805 sym_detach(pci_get_drvdata(pdev), pdev);
1806 free:
a71d035d
TB		 1807 if (do_iounmap)
1808 sym_iounmap_device(&sym_dev);
1da177e4
LT		 1809 pci_release_regions(pdev);
1810 disable:
a71d035d
TB		 1811 if (do_disable_device)
1812 pci_disable_device(pdev);
1da177e4
LT		 1813 leave:
1814 return -ENODEV;
1815}
1816
864473bb 1817static void sym2_remove(struct pci_dev *pdev)
1da177e4 1818{
5111eefa 1819 struct Scsi_Host *shost = pci_get_drvdata(pdev);
1da177e4 1820
5111eefa 1821 scsi_remove_host(shost);
5111eefa 1822 sym_detach(shost, pdev);
1da177e4
LT		 1823 pci_release_regions(pdev);
1824 pci_disable_device(pdev);
1825
1826 attach_count--;
1827}
1828
d68cd759
LV		 1829/**
1830 * sym2_io_error_detected() - called when PCI error is detected
1831 * @pdev: pointer to PCI device
1832 * @state: current state of the PCI slot
1833 */
1834static pci_ers_result_t sym2_io_error_detected(struct pci_dev *pdev,
1835 enum pci_channel_state state)
1836{
1837 /* If slot is permanently frozen, turn everything off */
1838 if (state == pci_channel_io_perm_failure) {
1839 sym2_remove(pdev);
1840 return PCI_ERS_RESULT_DISCONNECT;
1841 }
1842
1843 disable_irq(pdev->irq);
1844 pci_disable_device(pdev);
1845
1846 /* Request that MMIO be enabled, so register dump can be taken. */
1847 return PCI_ERS_RESULT_CAN_RECOVER;
1848}
1849
1850/**
1851 * sym2_io_slot_dump - Enable MMIO and dump debug registers
1852 * @pdev: pointer to PCI device
1853 */
1854static pci_ers_result_t sym2_io_slot_dump(struct pci_dev *pdev)
1855{
5111eefa 1856 struct Scsi_Host *shost = pci_get_drvdata(pdev);
d68cd759 1857
5111eefa 1858 sym_dump_registers(shost);
d68cd759
LV		 1859
1860 /* Request a slot reset. */
1861 return PCI_ERS_RESULT_NEED_RESET;
1862}
1863
1864/**
1865 * sym2_reset_workarounds - hardware-specific work-arounds
1866 *
1867 * This routine is similar to sym_set_workarounds(), except
1868 * that, at this point, we already know that the device was
af901ca1 1869 * successfully intialized at least once before, and so most
d68cd759
LV		 1870 * of the steps taken there are un-needed here.
1871 */
1872static void sym2_reset_workarounds(struct pci_dev *pdev)
1873{
d68cd759
LV		 1874 u_short status_reg;
1875 struct sym_chip *chip;
1876
bd678450 1877 chip = sym_lookup_chip_table(pdev->device, pdev->revision);
d68cd759
LV		 1878
1879 /* Work around for errant bit in 895A, in a fashion
1880 * similar to what is done in sym_set_workarounds().
1881 */
1882 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1883 if (!(chip->features & FE_66MHZ) && (status_reg & PCI_STATUS_66MHZ)) {
1884 status_reg = PCI_STATUS_66MHZ;
1885 pci_write_config_word(pdev, PCI_STATUS, status_reg);
1886 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1887 }
1888}
1889
1890/**
1891 * sym2_io_slot_reset() - called when the pci bus has been reset.
1892 * @pdev: pointer to PCI device
1893 *
1894 * Restart the card from scratch.
1895 */
1896static pci_ers_result_t sym2_io_slot_reset(struct pci_dev *pdev)
1897{
5111eefa
MW		 1898 struct Scsi_Host *shost = pci_get_drvdata(pdev);
1899 struct sym_hcb *np = sym_get_hcb(shost);
d68cd759
LV		 1900
1901 printk(KERN_INFO "%s: recovering from a PCI slot reset\n",
1902 sym_name(np));
1903
1904 if (pci_enable_device(pdev)) {
1905 printk(KERN_ERR "%s: Unable to enable after PCI reset\n",
1906 sym_name(np));
1907 return PCI_ERS_RESULT_DISCONNECT;
1908 }
1909
1910 pci_set_master(pdev);
1911 enable_irq(pdev->irq);
1912
1913 /* If the chip can do Memory Write Invalidate, enable it */
1914 if (np->features & FE_WRIE) {
1915 if (pci_set_mwi(pdev))
1916 return PCI_ERS_RESULT_DISCONNECT;
1917 }
1918
1919 /* Perform work-arounds, analogous to sym_set_workarounds() */
1920 sym2_reset_workarounds(pdev);
1921
1922 /* Perform host reset only on one instance of the card */
1923 if (PCI_FUNC(pdev->devfn) == 0) {
1924 if (sym_reset_scsi_bus(np, 0)) {
1925 printk(KERN_ERR "%s: Unable to reset scsi host\n",
1926 sym_name(np));
1927 return PCI_ERS_RESULT_DISCONNECT;
1928 }
5111eefa 1929 sym_start_up(shost, 1);
d68cd759
LV		 1930 }
1931
1932 return PCI_ERS_RESULT_RECOVERED;
1933}
1934
1935/**
1936 * sym2_io_resume() - resume normal ops after PCI reset
1937 * @pdev: pointer to PCI device
1938 *
1939 * Called when the error recovery driver tells us that its
1940 * OK to resume normal operation. Use completion to allow
1941 * halted scsi ops to resume.
1942 */
1943static void sym2_io_resume(struct pci_dev *pdev)
1944{
5111eefa 1945 struct Scsi_Host *shost = pci_get_drvdata(pdev);
99c9e0a1 1946 struct sym_data *sym_data = shost_priv(shost);
d68cd759
LV		 1947
1948 spin_lock_irq(shost->host_lock);
99c9e0a1
MW		 1949 if (sym_data->io_reset)
1950 complete_all(sym_data->io_reset);
d68cd759
LV		 1951 spin_unlock_irq(shost->host_lock);
1952}
1953
1da177e4
LT		 1954static void sym2_get_signalling(struct Scsi_Host *shost)
1955{
1956 struct sym_hcb *np = sym_get_hcb(shost);
1957 enum spi_signal_type type;
1958
1959 switch (np->scsi_mode) {
1960 case SMODE_SE:
1961 type = SPI_SIGNAL_SE;
1962 break;
1963 case SMODE_LVD:
1964 type = SPI_SIGNAL_LVD;
1965 break;
1966 case SMODE_HVD:
1967 type = SPI_SIGNAL_HVD;
1968 break;
1969 default:
1970 type = SPI_SIGNAL_UNKNOWN;
1971 break;
1972 }
1973 spi_signalling(shost) = type;
1974}
1975
1976static void sym2_set_offset(struct scsi_target *starget, int offset)
1977{
1978 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1979 struct sym_hcb *np = sym_get_hcb(shost);
1980 struct sym_tcb *tp = &np->target[starget->id];
1981
1982 tp->tgoal.offset = offset;
1983 tp->tgoal.check_nego = 1;
1984}
1985
1986static void sym2_set_period(struct scsi_target *starget, int period)
1987{
1988 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
1989 struct sym_hcb *np = sym_get_hcb(shost);
1990 struct sym_tcb *tp = &np->target[starget->id];
1991
e4862fed
JB		 1992 /* have to have DT for these transfers, but DT will also
1993 * set width, so check that this is allowed */
1994 if (period <= np->minsync && spi_width(starget))
1da177e4
LT		 1995 tp->tgoal.dt = 1;
1996
1997 tp->tgoal.period = period;
1998 tp->tgoal.check_nego = 1;
1999}
2000
2001static void sym2_set_width(struct scsi_target *starget, int width)
2002{
2003 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2004 struct sym_hcb *np = sym_get_hcb(shost);
2005 struct sym_tcb *tp = &np->target[starget->id];
2006
2007 /* It is illegal to have DT set on narrow transfers. If DT is
2008 * clear, we must also clear IU and QAS. */
2009 if (width == 0)
2010 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2011
2012 tp->tgoal.width = width;
2013 tp->tgoal.check_nego = 1;
2014}
2015
2016static void sym2_set_dt(struct scsi_target *starget, int dt)
2017{
2018 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2019 struct sym_hcb *np = sym_get_hcb(shost);
2020 struct sym_tcb *tp = &np->target[starget->id];
2021
2022 /* We must clear QAS and IU if DT is clear */
2023 if (dt)
2024 tp->tgoal.dt = 1;
2025 else
2026 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2027 tp->tgoal.check_nego = 1;
2028}
2029
8b2f8138 2030#if 0
1da177e4
LT		 2031static void sym2_set_iu(struct scsi_target *starget, int iu)
2032{
2033 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2034 struct sym_hcb *np = sym_get_hcb(shost);
2035 struct sym_tcb *tp = &np->target[starget->id];
2036
2037 if (iu)
2038 tp->tgoal.iu = tp->tgoal.dt = 1;
2039 else
2040 tp->tgoal.iu = 0;
2041 tp->tgoal.check_nego = 1;
2042}
2043
2044static void sym2_set_qas(struct scsi_target *starget, int qas)
2045{
2046 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2047 struct sym_hcb *np = sym_get_hcb(shost);
2048 struct sym_tcb *tp = &np->target[starget->id];
2049
2050 if (qas)
2051 tp->tgoal.dt = tp->tgoal.qas = 1;
2052 else
2053 tp->tgoal.qas = 0;
2054 tp->tgoal.check_nego = 1;
2055}
8b2f8138 2056#endif
1da177e4
LT		 2057
2058static struct spi_function_template sym2_transport_functions = {
2059 .set_offset = sym2_set_offset,
2060 .show_offset = 1,
2061 .set_period = sym2_set_period,
2062 .show_period = 1,
2063 .set_width = sym2_set_width,
2064 .show_width = 1,
2065 .set_dt = sym2_set_dt,
2066 .show_dt = 1,
8b2f8138 2067#if 0
1da177e4
LT		 2068 .set_iu = sym2_set_iu,
2069 .show_iu = 1,
2070 .set_qas = sym2_set_qas,
2071 .show_qas = 1,
8b2f8138 2072#endif
1da177e4
LT		 2073 .get_signalling = sym2_get_signalling,
2074};
2075
2076static struct pci_device_id sym2_id_table[] __devinitdata = {
2077 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2078 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2079 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2080 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2081 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2082 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2083 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2084 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2085 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2086 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2087 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2088 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2089 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
b2b3c121 2090 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8, 0xffff00, 0UL },
1da177e4
LT		 2091 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2092 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2093 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2094 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2095 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2096 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2097 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2098 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2099 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
147e505e 2100 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8, 0xffff00, 0UL }, /* new */
1da177e4
LT		 2101 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2102 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2103 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2104 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2105 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2106 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2107 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2108 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2109 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2110 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2111 { 0, }
2112};
2113
2114MODULE_DEVICE_TABLE(pci, sym2_id_table);
2115
d68cd759
LV		 2116static struct pci_error_handlers sym2_err_handler = {
2117 .error_detected = sym2_io_error_detected,
2118 .mmio_enabled = sym2_io_slot_dump,
2119 .slot_reset = sym2_io_slot_reset,
2120 .resume = sym2_io_resume,
2121};
2122
1da177e4
LT		 2123static struct pci_driver sym2_driver = {
2124 .name = NAME53C8XX,
2125 .id_table = sym2_id_table,
2126 .probe = sym2_probe,
864473bb 2127 .remove = sym2_remove,
d68cd759 2128 .err_handler = &sym2_err_handler,
1da177e4
LT		 2129};
2130
2131static int __init sym2_init(void)
2132{
2133 int error;
2134
2135 sym2_setup_params();
2136 sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2137 if (!sym2_transport_template)
2138 return -ENODEV;
2139
2140 error = pci_register_driver(&sym2_driver);
2141 if (error)
2142 spi_release_transport(sym2_transport_template);
2143 return error;
2144}
2145
2146static void __exit sym2_exit(void)
2147{
2148 pci_unregister_driver(&sym2_driver);
2149 spi_release_transport(sym2_transport_template);
2150}
2151
2152module_init(sym2_init);
2153module_exit(sym2_exit);
Linux 6.x block layer and io_uring tree(s)