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[deliverable/linux.git] / drivers / scsi / sym53c8xx_2 / sym_glue.c
1 /*
2 * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
3 * of PCI-SCSI IO processors.
4 *
5 * Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
6 * Copyright (c) 2003-2005 Matthew Wilcox <matthew@wil.cx>
7 *
8 * This driver is derived from the Linux sym53c8xx driver.
9 * Copyright (C) 1998-2000 Gerard Roudier
10 *
11 * The sym53c8xx driver is derived from the ncr53c8xx driver that had been
12 * a port of the FreeBSD ncr driver to Linux-1.2.13.
13 *
14 * The original ncr driver has been written for 386bsd and FreeBSD by
15 * Wolfgang Stanglmeier <wolf@cologne.de>
16 * Stefan Esser <se@mi.Uni-Koeln.de>
17 * Copyright (C) 1994 Wolfgang Stanglmeier
18 *
19 * Other major contributions:
20 *
21 * NVRAM detection and reading.
22 * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
23 *
24 *-----------------------------------------------------------------------------
25 *
26 * This program is free software; you can redistribute it and/or modify
27 * it under the terms of the GNU General Public License as published by
28 * the Free Software Foundation; either version 2 of the License, or
29 * (at your option) any later version.
30 *
31 * This program is distributed in the hope that it will be useful,
32 * but WITHOUT ANY WARRANTY; without even the implied warranty of
33 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
34 * GNU General Public License for more details.
35 *
36 * You should have received a copy of the GNU General Public License
37 * along with this program; if not, write to the Free Software
38 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
39 */
40 #include <linux/ctype.h>
41 #include <linux/init.h>
42 #include <linux/interrupt.h>
43 #include <linux/module.h>
44 #include <linux/moduleparam.h>
45 #include <linux/spinlock.h>
46 #include <scsi/scsi.h>
47 #include <scsi/scsi_tcq.h>
48 #include <scsi/scsi_device.h>
49 #include <scsi/scsi_transport.h>
50
51 #include "sym_glue.h"
52 #include "sym_nvram.h"
53
54 #define NAME53C "sym53c"
55 #define NAME53C8XX "sym53c8xx"
56
57 /* SPARC just has to be different ... */
58 #ifdef __sparc__
59 #define IRQ_FMT "%s"
60 #define IRQ_PRM(x) __irq_itoa(x)
61 #else
62 #define IRQ_FMT "%d"
63 #define IRQ_PRM(x) (x)
64 #endif
65
66 struct sym_driver_setup sym_driver_setup = SYM_LINUX_DRIVER_SETUP;
67 unsigned int sym_debug_flags = 0;
68
69 static char *excl_string;
70 static char *safe_string;
71 module_param_named(cmd_per_lun, sym_driver_setup.max_tag, ushort, 0);
72 module_param_string(tag_ctrl, sym_driver_setup.tag_ctrl, 100, 0);
73 module_param_named(burst, sym_driver_setup.burst_order, byte, 0);
74 module_param_named(led, sym_driver_setup.scsi_led, byte, 0);
75 module_param_named(diff, sym_driver_setup.scsi_diff, byte, 0);
76 module_param_named(irqm, sym_driver_setup.irq_mode, byte, 0);
77 module_param_named(buschk, sym_driver_setup.scsi_bus_check, byte, 0);
78 module_param_named(hostid, sym_driver_setup.host_id, byte, 0);
79 module_param_named(verb, sym_driver_setup.verbose, byte, 0);
80 module_param_named(debug, sym_debug_flags, uint, 0);
81 module_param_named(settle, sym_driver_setup.settle_delay, byte, 0);
82 module_param_named(nvram, sym_driver_setup.use_nvram, byte, 0);
83 module_param_named(excl, excl_string, charp, 0);
84 module_param_named(safe, safe_string, charp, 0);
85
86 MODULE_PARM_DESC(cmd_per_lun, "The maximum number of tags to use by default");
87 MODULE_PARM_DESC(tag_ctrl, "More detailed control over tags per LUN");
88 MODULE_PARM_DESC(burst, "Maximum burst. 0 to disable, 255 to read from registers");
89 MODULE_PARM_DESC(led, "Set to 1 to enable LED support");
90 MODULE_PARM_DESC(diff, "0 for no differential mode, 1 for BIOS, 2 for always, 3 for not GPIO3");
91 MODULE_PARM_DESC(irqm, "0 for open drain, 1 to leave alone, 2 for totem pole");
92 MODULE_PARM_DESC(buschk, "0 to not check, 1 for detach on error, 2 for warn on error");
93 MODULE_PARM_DESC(hostid, "The SCSI ID to use for the host adapters");
94 MODULE_PARM_DESC(verb, "0 for minimal verbosity, 1 for normal, 2 for excessive");
95 MODULE_PARM_DESC(debug, "Set bits to enable debugging");
96 MODULE_PARM_DESC(settle, "Settle delay in seconds. Default 3");
97 MODULE_PARM_DESC(nvram, "Option currently not used");
98 MODULE_PARM_DESC(excl, "List ioport addresses here to prevent controllers from being attached");
99 MODULE_PARM_DESC(safe, "Set other settings to a \"safe mode\"");
100
101 MODULE_LICENSE("GPL");
102 MODULE_VERSION(SYM_VERSION);
103 MODULE_AUTHOR("Matthew Wilcox <matthew@wil.cx>");
104 MODULE_DESCRIPTION("NCR, Symbios and LSI 8xx and 1010 PCI SCSI adapters");
105
106 static void sym2_setup_params(void)
107 {
108 char *p = excl_string;
109 int xi = 0;
110
111 while (p && (xi < 8)) {
112 char *next_p;
113 int val = (int) simple_strtoul(p, &next_p, 0);
114 sym_driver_setup.excludes[xi++] = val;
115 p = next_p;
116 }
117
118 if (safe_string) {
119 if (*safe_string == 'y') {
120 sym_driver_setup.max_tag = 0;
121 sym_driver_setup.burst_order = 0;
122 sym_driver_setup.scsi_led = 0;
123 sym_driver_setup.scsi_diff = 1;
124 sym_driver_setup.irq_mode = 0;
125 sym_driver_setup.scsi_bus_check = 2;
126 sym_driver_setup.host_id = 7;
127 sym_driver_setup.verbose = 2;
128 sym_driver_setup.settle_delay = 10;
129 sym_driver_setup.use_nvram = 1;
130 } else if (*safe_string != 'n') {
131 printk(KERN_WARNING NAME53C8XX "Ignoring parameter %s"
132 " passed to safe option", safe_string);
133 }
134 }
135 }
136
137 /*
138 * We used to try to deal with 64-bit BARs here, but don't any more.
139 * There are many parts of this driver which would need to be modified
140 * to handle a 64-bit base address, including scripts. I'm uncomfortable
141 * with making those changes when I have no way of testing it, so I'm
142 * just going to disable it.
143 *
144 * Note that some machines (eg HP rx8620 and Superdome) have bus addresses
145 * below 4GB and physical addresses above 4GB. These will continue to work.
146 */
147 static int __devinit
148 pci_get_base_address(struct pci_dev *pdev, int index, unsigned long *basep)
149 {
150 u32 tmp;
151 unsigned long base;
152 #define PCI_BAR_OFFSET(index) (PCI_BASE_ADDRESS_0 + (index<<2))
153
154 pci_read_config_dword(pdev, PCI_BAR_OFFSET(index++), &tmp);
155 base = tmp;
156 if ((tmp & 0x7) == PCI_BASE_ADDRESS_MEM_TYPE_64) {
157 pci_read_config_dword(pdev, PCI_BAR_OFFSET(index++), &tmp);
158 if (tmp > 0) {
159 dev_err(&pdev->dev,
160 "BAR %d is 64-bit, disabling\n", index - 1);
161 base = 0;
162 }
163 }
164
165 if ((base & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
166 base &= PCI_BASE_ADDRESS_IO_MASK;
167 } else {
168 base &= PCI_BASE_ADDRESS_MEM_MASK;
169 }
170
171 *basep = base;
172 return index;
173 #undef PCI_BAR_OFFSET
174 }
175
176 static struct scsi_transport_template *sym2_transport_template = NULL;
177
178 /*
179 * Used by the eh thread to wait for command completion.
180 * It is allocated on the eh thread stack.
181 */
182 struct sym_eh_wait {
183 struct completion done;
184 struct timer_list timer;
185 void (*old_done)(struct scsi_cmnd *);
186 int to_do;
187 int timed_out;
188 };
189
190 /*
191 * Driver private area in the SCSI command structure.
192 */
193 struct sym_ucmd { /* Override the SCSI pointer structure */
194 dma_addr_t data_mapping;
195 u_char data_mapped;
196 struct sym_eh_wait *eh_wait;
197 };
198
199 #define SYM_UCMD_PTR(cmd) ((struct sym_ucmd *)(&(cmd)->SCp))
200 #define SYM_SOFTC_PTR(cmd) sym_get_hcb(cmd->device->host)
201
202 static void __unmap_scsi_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
203 {
204 int dma_dir = cmd->sc_data_direction;
205
206 switch(SYM_UCMD_PTR(cmd)->data_mapped) {
207 case 2:
208 pci_unmap_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
209 break;
210 case 1:
211 pci_unmap_single(pdev, SYM_UCMD_PTR(cmd)->data_mapping,
212 cmd->request_bufflen, dma_dir);
213 break;
214 }
215 SYM_UCMD_PTR(cmd)->data_mapped = 0;
216 }
217
218 static dma_addr_t __map_scsi_single_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
219 {
220 dma_addr_t mapping;
221 int dma_dir = cmd->sc_data_direction;
222
223 mapping = pci_map_single(pdev, cmd->request_buffer,
224 cmd->request_bufflen, dma_dir);
225 if (mapping) {
226 SYM_UCMD_PTR(cmd)->data_mapped = 1;
227 SYM_UCMD_PTR(cmd)->data_mapping = mapping;
228 }
229
230 return mapping;
231 }
232
233 static int __map_scsi_sg_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)
234 {
235 int use_sg;
236 int dma_dir = cmd->sc_data_direction;
237
238 use_sg = pci_map_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
239 if (use_sg > 0) {
240 SYM_UCMD_PTR(cmd)->data_mapped = 2;
241 SYM_UCMD_PTR(cmd)->data_mapping = use_sg;
242 }
243
244 return use_sg;
245 }
246
247 #define unmap_scsi_data(np, cmd) \
248 __unmap_scsi_data(np->s.device, cmd)
249 #define map_scsi_single_data(np, cmd) \
250 __map_scsi_single_data(np->s.device, cmd)
251 #define map_scsi_sg_data(np, cmd) \
252 __map_scsi_sg_data(np->s.device, cmd)
253 /*
254 * Complete a pending CAM CCB.
255 */
256 void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *cmd)
257 {
258 unmap_scsi_data(np, cmd);
259 cmd->scsi_done(cmd);
260 }
261
262 static void sym_xpt_done2(struct sym_hcb *np, struct scsi_cmnd *cmd, int cam_status)
263 {
264 sym_set_cam_status(cmd, cam_status);
265 sym_xpt_done(np, cmd);
266 }
267
268
269 /*
270 * Tell the SCSI layer about a BUS RESET.
271 */
272 void sym_xpt_async_bus_reset(struct sym_hcb *np)
273 {
274 printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
275 np->s.settle_time = jiffies + sym_driver_setup.settle_delay * HZ;
276 np->s.settle_time_valid = 1;
277 if (sym_verbose >= 2)
278 printf_info("%s: command processing suspended for %d seconds\n",
279 sym_name(np), sym_driver_setup.settle_delay);
280 }
281
282 /*
283 * Tell the SCSI layer about a BUS DEVICE RESET message sent.
284 */
285 void sym_xpt_async_sent_bdr(struct sym_hcb *np, int target)
286 {
287 printf_notice("%s: TARGET %d has been reset.\n", sym_name(np), target);
288 }
289
290 /*
291 * Choose the more appropriate CAM status if
292 * the IO encountered an extended error.
293 */
294 static int sym_xerr_cam_status(int cam_status, int x_status)
295 {
296 if (x_status) {
297 if (x_status & XE_PARITY_ERR)
298 cam_status = DID_PARITY;
299 else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN))
300 cam_status = DID_ERROR;
301 else if (x_status & XE_BAD_PHASE)
302 cam_status = DID_ERROR;
303 else
304 cam_status = DID_ERROR;
305 }
306 return cam_status;
307 }
308
309 /*
310 * Build CAM result for a failed or auto-sensed IO.
311 */
312 void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid)
313 {
314 struct scsi_cmnd *cmd = cp->cmd;
315 u_int cam_status, scsi_status, drv_status;
316
317 drv_status = 0;
318 cam_status = DID_OK;
319 scsi_status = cp->ssss_status;
320
321 if (cp->host_flags & HF_SENSE) {
322 scsi_status = cp->sv_scsi_status;
323 resid = cp->sv_resid;
324 if (sym_verbose && cp->sv_xerr_status)
325 sym_print_xerr(cmd, cp->sv_xerr_status);
326 if (cp->host_status == HS_COMPLETE &&
327 cp->ssss_status == S_GOOD &&
328 cp->xerr_status == 0) {
329 cam_status = sym_xerr_cam_status(DID_OK,
330 cp->sv_xerr_status);
331 drv_status = DRIVER_SENSE;
332 /*
333 * Bounce back the sense data to user.
334 */
335 memset(&cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
336 memcpy(cmd->sense_buffer, cp->sns_bbuf,
337 min(sizeof(cmd->sense_buffer),
338 (size_t)SYM_SNS_BBUF_LEN));
339 #if 0
340 /*
341 * If the device reports a UNIT ATTENTION condition
342 * due to a RESET condition, we should consider all
343 * disconnect CCBs for this unit as aborted.
344 */
345 if (1) {
346 u_char *p;
347 p = (u_char *) cmd->sense_data;
348 if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
349 sym_clear_tasks(np, DID_ABORT,
350 cp->target,cp->lun, -1);
351 }
352 #endif
353 } else {
354 /*
355 * Error return from our internal request sense. This
356 * is bad: we must clear the contingent allegiance
357 * condition otherwise the device will always return
358 * BUSY. Use a big stick.
359 */
360 sym_reset_scsi_target(np, cmd->device->id);
361 cam_status = DID_ERROR;
362 }
363 } else if (cp->host_status == HS_COMPLETE) /* Bad SCSI status */
364 cam_status = DID_OK;
365 else if (cp->host_status == HS_SEL_TIMEOUT) /* Selection timeout */
366 cam_status = DID_NO_CONNECT;
367 else if (cp->host_status == HS_UNEXPECTED) /* Unexpected BUS FREE*/
368 cam_status = DID_ERROR;
369 else { /* Extended error */
370 if (sym_verbose) {
371 sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n",
372 cp->host_status, cp->ssss_status,
373 cp->xerr_status);
374 }
375 /*
376 * Set the most appropriate value for CAM status.
377 */
378 cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
379 }
380 cmd->resid = resid;
381 cmd->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
382 }
383
384
385 /*
386 * Build the scatter/gather array for an I/O.
387 */
388
389 static int sym_scatter_no_sglist(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
390 {
391 struct sym_tblmove *data = &cp->phys.data[SYM_CONF_MAX_SG-1];
392 int segment;
393 unsigned int len = cmd->request_bufflen;
394
395 if (len) {
396 dma_addr_t baddr = map_scsi_single_data(np, cmd);
397 if (baddr) {
398 if (len & 1) {
399 struct sym_tcb *tp = &np->target[cp->target];
400 if (tp->head.wval & EWS) {
401 len++;
402 cp->odd_byte_adjustment++;
403 }
404 }
405 cp->data_len = len;
406 sym_build_sge(np, data, baddr, len);
407 segment = 1;
408 } else {
409 segment = -2;
410 }
411 } else {
412 segment = 0;
413 }
414
415 return segment;
416 }
417
418 static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd)
419 {
420 int segment;
421 int use_sg = (int) cmd->use_sg;
422
423 cp->data_len = 0;
424
425 if (!use_sg)
426 segment = sym_scatter_no_sglist(np, cp, cmd);
427 else if ((use_sg = map_scsi_sg_data(np, cmd)) > 0) {
428 struct scatterlist *scatter = (struct scatterlist *)cmd->buffer;
429 struct sym_tcb *tp = &np->target[cp->target];
430 struct sym_tblmove *data;
431
432 if (use_sg > SYM_CONF_MAX_SG) {
433 unmap_scsi_data(np, cmd);
434 return -1;
435 }
436
437 data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
438
439 for (segment = 0; segment < use_sg; segment++) {
440 dma_addr_t baddr = sg_dma_address(&scatter[segment]);
441 unsigned int len = sg_dma_len(&scatter[segment]);
442
443 if ((len & 1) && (tp->head.wval & EWS)) {
444 len++;
445 cp->odd_byte_adjustment++;
446 }
447
448 sym_build_sge(np, &data[segment], baddr, len);
449 cp->data_len += len;
450 }
451 } else {
452 segment = -2;
453 }
454
455 return segment;
456 }
457
458 /*
459 * Queue a SCSI command.
460 */
461 static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd)
462 {
463 struct scsi_device *sdev = cmd->device;
464 struct sym_tcb *tp;
465 struct sym_lcb *lp;
466 struct sym_ccb *cp;
467 int order;
468
469 /*
470 * Minimal checkings, so that we will not
471 * go outside our tables.
472 */
473 if (sdev->id == np->myaddr) {
474 sym_xpt_done2(np, cmd, DID_NO_CONNECT);
475 return 0;
476 }
477
478 /*
479 * Retrieve the target descriptor.
480 */
481 tp = &np->target[sdev->id];
482
483 /*
484 * Select tagged/untagged.
485 */
486 lp = sym_lp(tp, sdev->lun);
487 order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
488
489 /*
490 * Queue the SCSI IO.
491 */
492 cp = sym_get_ccb(np, cmd, order);
493 if (!cp)
494 return 1; /* Means resource shortage */
495 sym_queue_scsiio(np, cmd, cp);
496 return 0;
497 }
498
499 /*
500 * Setup buffers and pointers that address the CDB.
501 */
502 static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
503 {
504 memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len);
505
506 cp->phys.cmd.addr = CCB_BA(cp, cdb_buf[0]);
507 cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len);
508
509 return 0;
510 }
511
512 /*
513 * Setup pointers that address the data and start the I/O.
514 */
515 int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp)
516 {
517 int dir;
518 struct sym_tcb *tp = &np->target[cp->target];
519 struct sym_lcb *lp = sym_lp(tp, cp->lun);
520
521 /*
522 * Build the CDB.
523 */
524 if (sym_setup_cdb(np, cmd, cp))
525 goto out_abort;
526
527 /*
528 * No direction means no data.
529 */
530 dir = cmd->sc_data_direction;
531 if (dir != DMA_NONE) {
532 cp->segments = sym_scatter(np, cp, cmd);
533 if (cp->segments < 0) {
534 sym_set_cam_status(cmd, DID_ERROR);
535 goto out_abort;
536 }
537 } else {
538 cp->data_len = 0;
539 cp->segments = 0;
540 }
541
542 /*
543 * Set data pointers.
544 */
545 sym_setup_data_pointers(np, cp, dir);
546
547 /*
548 * When `#ifed 1', the code below makes the driver
549 * panic on the first attempt to write to a SCSI device.
550 * It is the first test we want to do after a driver
551 * change that does not seem obviously safe. :)
552 */
553 #if 0
554 switch (cp->cdb_buf[0]) {
555 case 0x0A: case 0x2A: case 0xAA:
556 panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
557 break;
558 default:
559 break;
560 }
561 #endif
562
563 /*
564 * activate this job.
565 */
566 if (lp)
567 sym_start_next_ccbs(np, lp, 2);
568 else
569 sym_put_start_queue(np, cp);
570 return 0;
571
572 out_abort:
573 sym_free_ccb(np, cp);
574 sym_xpt_done(np, cmd);
575 return 0;
576 }
577
578
579 /*
580 * timer daemon.
581 *
582 * Misused to keep the driver running when
583 * interrupts are not configured correctly.
584 */
585 static void sym_timer(struct sym_hcb *np)
586 {
587 unsigned long thistime = jiffies;
588
589 /*
590 * Restart the timer.
591 */
592 np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
593 add_timer(&np->s.timer);
594
595 /*
596 * If we are resetting the ncr, wait for settle_time before
597 * clearing it. Then command processing will be resumed.
598 */
599 if (np->s.settle_time_valid) {
600 if (time_before_eq(np->s.settle_time, thistime)) {
601 if (sym_verbose >= 2 )
602 printk("%s: command processing resumed\n",
603 sym_name(np));
604 np->s.settle_time_valid = 0;
605 }
606 return;
607 }
608
609 /*
610 * Nothing to do for now, but that may come.
611 */
612 if (np->s.lasttime + 4*HZ < thistime) {
613 np->s.lasttime = thistime;
614 }
615
616 #ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
617 /*
618 * Some way-broken PCI bridges may lead to
619 * completions being lost when the clearing
620 * of the INTFLY flag by the CPU occurs
621 * concurrently with the chip raising this flag.
622 * If this ever happen, lost completions will
623 * be reaped here.
624 */
625 sym_wakeup_done(np);
626 #endif
627 }
628
629
630 /*
631 * PCI BUS error handler.
632 */
633 void sym_log_bus_error(struct sym_hcb *np)
634 {
635 u_short pci_sts;
636 pci_read_config_word(np->s.device, PCI_STATUS, &pci_sts);
637 if (pci_sts & 0xf900) {
638 pci_write_config_word(np->s.device, PCI_STATUS, pci_sts);
639 printf("%s: PCI STATUS = 0x%04x\n",
640 sym_name(np), pci_sts & 0xf900);
641 }
642 }
643
644 /*
645 * queuecommand method. Entered with the host adapter lock held and
646 * interrupts disabled.
647 */
648 static int sym53c8xx_queue_command(struct scsi_cmnd *cmd,
649 void (*done)(struct scsi_cmnd *))
650 {
651 struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
652 struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
653 int sts = 0;
654
655 cmd->scsi_done = done;
656 memset(ucp, 0, sizeof(*ucp));
657
658 /*
659 * Shorten our settle_time if needed for
660 * this command not to time out.
661 */
662 if (np->s.settle_time_valid && cmd->timeout_per_command) {
663 unsigned long tlimit = jiffies + cmd->timeout_per_command;
664 tlimit -= SYM_CONF_TIMER_INTERVAL*2;
665 if (time_after(np->s.settle_time, tlimit)) {
666 np->s.settle_time = tlimit;
667 }
668 }
669
670 if (np->s.settle_time_valid)
671 return SCSI_MLQUEUE_HOST_BUSY;
672
673 sts = sym_queue_command(np, cmd);
674 if (sts)
675 return SCSI_MLQUEUE_HOST_BUSY;
676 return 0;
677 }
678
679 /*
680 * Linux entry point of the interrupt handler.
681 */
682 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs)
683 {
684 unsigned long flags;
685 struct sym_hcb *np = (struct sym_hcb *)dev_id;
686
687 if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
688
689 spin_lock_irqsave(np->s.host->host_lock, flags);
690 sym_interrupt(np);
691 spin_unlock_irqrestore(np->s.host->host_lock, flags);
692
693 if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
694
695 return IRQ_HANDLED;
696 }
697
698 /*
699 * Linux entry point of the timer handler
700 */
701 static void sym53c8xx_timer(unsigned long npref)
702 {
703 struct sym_hcb *np = (struct sym_hcb *)npref;
704 unsigned long flags;
705
706 spin_lock_irqsave(np->s.host->host_lock, flags);
707 sym_timer(np);
708 spin_unlock_irqrestore(np->s.host->host_lock, flags);
709 }
710
711
712 /*
713 * What the eh thread wants us to perform.
714 */
715 #define SYM_EH_ABORT 0
716 #define SYM_EH_DEVICE_RESET 1
717 #define SYM_EH_BUS_RESET 2
718 #define SYM_EH_HOST_RESET 3
719
720 /*
721 * What we will do regarding the involved SCSI command.
722 */
723 #define SYM_EH_DO_IGNORE 0
724 #define SYM_EH_DO_COMPLETE 1
725 #define SYM_EH_DO_WAIT 2
726
727 /*
728 * Our general completion handler.
729 */
730 static void __sym_eh_done(struct scsi_cmnd *cmd, int timed_out)
731 {
732 struct sym_eh_wait *ep = SYM_UCMD_PTR(cmd)->eh_wait;
733 if (!ep)
734 return;
735
736 /* Try to avoid a race here (not 100% safe) */
737 if (!timed_out) {
738 ep->timed_out = 0;
739 if (ep->to_do == SYM_EH_DO_WAIT && !del_timer(&ep->timer))
740 return;
741 }
742
743 /* Revert everything */
744 SYM_UCMD_PTR(cmd)->eh_wait = NULL;
745 cmd->scsi_done = ep->old_done;
746
747 /* Wake up the eh thread if it wants to sleep */
748 if (ep->to_do == SYM_EH_DO_WAIT)
749 complete(&ep->done);
750 }
751
752 /*
753 * scsi_done() alias when error recovery is in progress.
754 */
755 static void sym_eh_done(struct scsi_cmnd *cmd) { __sym_eh_done(cmd, 0); }
756
757 /*
758 * Some timeout handler to avoid waiting too long.
759 */
760 static void sym_eh_timeout(u_long p) { __sym_eh_done((struct scsi_cmnd *)p, 1); }
761
762 /*
763 * Generic method for our eh processing.
764 * The 'op' argument tells what we have to do.
765 */
766 static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
767 {
768 struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
769 SYM_QUEHEAD *qp;
770 int to_do = SYM_EH_DO_IGNORE;
771 int sts = -1;
772 struct sym_eh_wait eh, *ep = &eh;
773
774 dev_warn(&cmd->device->sdev_gendev, "%s operation started.\n", opname);
775
776 /* This one is queued in some place -> to wait for completion */
777 FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
778 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
779 if (cp->cmd == cmd) {
780 to_do = SYM_EH_DO_WAIT;
781 goto prepare;
782 }
783 }
784
785 prepare:
786 /* Prepare stuff to either ignore, complete or wait for completion */
787 switch(to_do) {
788 default:
789 case SYM_EH_DO_IGNORE:
790 break;
791 case SYM_EH_DO_WAIT:
792 init_completion(&ep->done);
793 /* fall through */
794 case SYM_EH_DO_COMPLETE:
795 ep->old_done = cmd->scsi_done;
796 cmd->scsi_done = sym_eh_done;
797 SYM_UCMD_PTR(cmd)->eh_wait = ep;
798 }
799
800 /* Try to proceed the operation we have been asked for */
801 sts = -1;
802 switch(op) {
803 case SYM_EH_ABORT:
804 sts = sym_abort_scsiio(np, cmd, 1);
805 break;
806 case SYM_EH_DEVICE_RESET:
807 sts = sym_reset_scsi_target(np, cmd->device->id);
808 break;
809 case SYM_EH_BUS_RESET:
810 sym_reset_scsi_bus(np, 1);
811 sts = 0;
812 break;
813 case SYM_EH_HOST_RESET:
814 sym_reset_scsi_bus(np, 0);
815 sym_start_up (np, 1);
816 sts = 0;
817 break;
818 default:
819 break;
820 }
821
822 /* On error, restore everything and cross fingers :) */
823 if (sts) {
824 SYM_UCMD_PTR(cmd)->eh_wait = NULL;
825 cmd->scsi_done = ep->old_done;
826 to_do = SYM_EH_DO_IGNORE;
827 }
828
829 ep->to_do = to_do;
830 /* Complete the command with locks held as required by the driver */
831 if (to_do == SYM_EH_DO_COMPLETE)
832 sym_xpt_done2(np, cmd, DID_ABORT);
833
834 /* Wait for completion with locks released, as required by kernel */
835 if (to_do == SYM_EH_DO_WAIT) {
836 init_timer(&ep->timer);
837 ep->timer.expires = jiffies + (5*HZ);
838 ep->timer.function = sym_eh_timeout;
839 ep->timer.data = (u_long)cmd;
840 ep->timed_out = 1; /* Be pessimistic for once :) */
841 add_timer(&ep->timer);
842 spin_unlock_irq(np->s.host->host_lock);
843 wait_for_completion(&ep->done);
844 spin_lock_irq(np->s.host->host_lock);
845 if (ep->timed_out)
846 sts = -2;
847 }
848 dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
849 sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
850 return sts ? SCSI_FAILED : SCSI_SUCCESS;
851 }
852
853
854 /*
855 * Error handlers called from the eh thread (one thread per HBA).
856 */
857 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
858 {
859 return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
860 }
861
862 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
863 {
864 return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
865 }
866
867 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
868 {
869 return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
870 }
871
872 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
873 {
874 return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
875 }
876
877 /*
878 * Tune device queuing depth, according to various limits.
879 */
880 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
881 {
882 struct sym_lcb *lp = sym_lp(tp, lun);
883 u_short oldtags;
884
885 if (!lp)
886 return;
887
888 oldtags = lp->s.reqtags;
889
890 if (reqtags > lp->s.scdev_depth)
891 reqtags = lp->s.scdev_depth;
892
893 lp->started_limit = reqtags ? reqtags : 2;
894 lp->started_max = 1;
895 lp->s.reqtags = reqtags;
896
897 if (reqtags != oldtags) {
898 dev_info(&tp->starget->dev,
899 "tagged command queuing %s, command queue depth %d.\n",
900 lp->s.reqtags ? "enabled" : "disabled",
901 lp->started_limit);
902 }
903 }
904
905 /*
906 * Linux select queue depths function
907 */
908 #define DEF_DEPTH (sym_driver_setup.max_tag)
909 #define ALL_TARGETS -2
910 #define NO_TARGET -1
911 #define ALL_LUNS -2
912 #define NO_LUN -1
913
914 static int device_queue_depth(struct sym_hcb *np, int target, int lun)
915 {
916 int c, h, t, u, v;
917 char *p = sym_driver_setup.tag_ctrl;
918 char *ep;
919
920 h = -1;
921 t = NO_TARGET;
922 u = NO_LUN;
923 while ((c = *p++) != 0) {
924 v = simple_strtoul(p, &ep, 0);
925 switch(c) {
926 case '/':
927 ++h;
928 t = ALL_TARGETS;
929 u = ALL_LUNS;
930 break;
931 case 't':
932 if (t != target)
933 t = (target == v) ? v : NO_TARGET;
934 u = ALL_LUNS;
935 break;
936 case 'u':
937 if (u != lun)
938 u = (lun == v) ? v : NO_LUN;
939 break;
940 case 'q':
941 if (h == np->s.unit &&
942 (t == ALL_TARGETS || t == target) &&
943 (u == ALL_LUNS || u == lun))
944 return v;
945 break;
946 case '-':
947 t = ALL_TARGETS;
948 u = ALL_LUNS;
949 break;
950 default:
951 break;
952 }
953 p = ep;
954 }
955 return DEF_DEPTH;
956 }
957
958 static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
959 {
960 struct sym_hcb *np;
961 struct sym_tcb *tp;
962
963 if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
964 return -ENXIO;
965
966 np = sym_get_hcb(sdev->host);
967 tp = &np->target[sdev->id];
968
969 /*
970 * Fail the device init if the device is flagged NOSCAN at BOOT in
971 * the NVRAM. This may speed up boot and maintain coherency with
972 * BIOS device numbering. Clearing the flag allows the user to
973 * rescan skipped devices later. We also return an error for
974 * devices not flagged for SCAN LUNS in the NVRAM since some single
975 * lun devices behave badly when asked for a non zero LUN.
976 */
977
978 if ((tp->usrflags & SYM_SCAN_BOOT_DISABLED) ||
979 ((tp->usrflags & SYM_SCAN_LUNS_DISABLED) && sdev->lun != 0)) {
980 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
981 return -ENXIO;
982 }
983
984 tp->starget = sdev->sdev_target;
985 return 0;
986 }
987
988 /*
989 * Linux entry point for device queue sizing.
990 */
991 static int sym53c8xx_slave_configure(struct scsi_device *device)
992 {
993 struct sym_hcb *np = sym_get_hcb(device->host);
994 struct sym_tcb *tp = &np->target[device->id];
995 struct sym_lcb *lp;
996 int reqtags, depth_to_use;
997
998 /*
999 * Allocate the LCB if not yet.
1000 * If it fail, we may well be in the sh*t. :)
1001 */
1002 lp = sym_alloc_lcb(np, device->id, device->lun);
1003 if (!lp)
1004 return -ENOMEM;
1005
1006 /*
1007 * Get user flags.
1008 */
1009 lp->curr_flags = lp->user_flags;
1010
1011 /*
1012 * Select queue depth from driver setup.
1013 * Donnot use more than configured by user.
1014 * Use at least 2.
1015 * Donnot use more than our maximum.
1016 */
1017 reqtags = device_queue_depth(np, device->id, device->lun);
1018 if (reqtags > tp->usrtags)
1019 reqtags = tp->usrtags;
1020 if (!device->tagged_supported)
1021 reqtags = 0;
1022 #if 1 /* Avoid to locally queue commands for no good reasons */
1023 if (reqtags > SYM_CONF_MAX_TAG)
1024 reqtags = SYM_CONF_MAX_TAG;
1025 depth_to_use = (reqtags ? reqtags : 2);
1026 #else
1027 depth_to_use = (reqtags ? SYM_CONF_MAX_TAG : 2);
1028 #endif
1029 scsi_adjust_queue_depth(device,
1030 (device->tagged_supported ?
1031 MSG_SIMPLE_TAG : 0),
1032 depth_to_use);
1033 lp->s.scdev_depth = depth_to_use;
1034 sym_tune_dev_queuing(tp, device->lun, reqtags);
1035
1036 if (!spi_initial_dv(device->sdev_target))
1037 spi_dv_device(device);
1038
1039 return 0;
1040 }
1041
1042 /*
1043 * Linux entry point for info() function
1044 */
1045 static const char *sym53c8xx_info (struct Scsi_Host *host)
1046 {
1047 return SYM_DRIVER_NAME;
1048 }
1049
1050
1051 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1052 /*
1053 * Proc file system stuff
1054 *
1055 * A read operation returns adapter information.
1056 * A write operation is a control command.
1057 * The string is parsed in the driver code and the command is passed
1058 * to the sym_usercmd() function.
1059 */
1060
1061 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1062
1063 struct sym_usrcmd {
1064 u_long target;
1065 u_long lun;
1066 u_long data;
1067 u_long cmd;
1068 };
1069
1070 #define UC_SETSYNC 10
1071 #define UC_SETTAGS 11
1072 #define UC_SETDEBUG 12
1073 #define UC_SETWIDE 14
1074 #define UC_SETFLAG 15
1075 #define UC_SETVERBOSE 17
1076 #define UC_RESETDEV 18
1077 #define UC_CLEARDEV 19
1078
1079 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
1080 {
1081 struct sym_tcb *tp;
1082 int t, l;
1083
1084 switch (uc->cmd) {
1085 case 0: return;
1086
1087 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1088 case UC_SETDEBUG:
1089 sym_debug_flags = uc->data;
1090 break;
1091 #endif
1092 case UC_SETVERBOSE:
1093 np->verbose = uc->data;
1094 break;
1095 default:
1096 /*
1097 * We assume that other commands apply to targets.
1098 * This should always be the case and avoid the below
1099 * 4 lines to be repeated 6 times.
1100 */
1101 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
1102 if (!((uc->target >> t) & 1))
1103 continue;
1104 tp = &np->target[t];
1105
1106 switch (uc->cmd) {
1107
1108 case UC_SETSYNC:
1109 if (!uc->data || uc->data >= 255) {
1110 tp->tgoal.iu = tp->tgoal.dt =
1111 tp->tgoal.qas = 0;
1112 tp->tgoal.offset = 0;
1113 } else if (uc->data <= 9 && np->minsync_dt) {
1114 if (uc->data < np->minsync_dt)
1115 uc->data = np->minsync_dt;
1116 tp->tgoal.iu = tp->tgoal.dt =
1117 tp->tgoal.qas = 1;
1118 tp->tgoal.width = 1;
1119 tp->tgoal.period = uc->data;
1120 tp->tgoal.offset = np->maxoffs_dt;
1121 } else {
1122 if (uc->data < np->minsync)
1123 uc->data = np->minsync;
1124 tp->tgoal.iu = tp->tgoal.dt =
1125 tp->tgoal.qas = 0;
1126 tp->tgoal.period = uc->data;
1127 tp->tgoal.offset = np->maxoffs;
1128 }
1129 tp->tgoal.check_nego = 1;
1130 break;
1131 case UC_SETWIDE:
1132 tp->tgoal.width = uc->data ? 1 : 0;
1133 tp->tgoal.check_nego = 1;
1134 break;
1135 case UC_SETTAGS:
1136 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
1137 sym_tune_dev_queuing(tp, l, uc->data);
1138 break;
1139 case UC_RESETDEV:
1140 tp->to_reset = 1;
1141 np->istat_sem = SEM;
1142 OUTB(np, nc_istat, SIGP|SEM);
1143 break;
1144 case UC_CLEARDEV:
1145 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
1146 struct sym_lcb *lp = sym_lp(tp, l);
1147 if (lp) lp->to_clear = 1;
1148 }
1149 np->istat_sem = SEM;
1150 OUTB(np, nc_istat, SIGP|SEM);
1151 break;
1152 case UC_SETFLAG:
1153 tp->usrflags = uc->data;
1154 break;
1155 }
1156 }
1157 break;
1158 }
1159 }
1160
1161 static int skip_spaces(char *ptr, int len)
1162 {
1163 int cnt, c;
1164
1165 for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
1166
1167 return (len - cnt);
1168 }
1169
1170 static int get_int_arg(char *ptr, int len, u_long *pv)
1171 {
1172 char *end;
1173
1174 *pv = simple_strtoul(ptr, &end, 10);
1175 return (end - ptr);
1176 }
1177
1178 static int is_keyword(char *ptr, int len, char *verb)
1179 {
1180 int verb_len = strlen(verb);
1181
1182 if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1183 return verb_len;
1184 else
1185 return 0;
1186 }
1187
1188 #define SKIP_SPACES(ptr, len) \
1189 if ((arg_len = skip_spaces(ptr, len)) < 1) \
1190 return -EINVAL; \
1191 ptr += arg_len; len -= arg_len;
1192
1193 #define GET_INT_ARG(ptr, len, v) \
1194 if (!(arg_len = get_int_arg(ptr, len, &(v)))) \
1195 return -EINVAL; \
1196 ptr += arg_len; len -= arg_len;
1197
1198
1199 /*
1200 * Parse a control command
1201 */
1202
1203 static int sym_user_command(struct sym_hcb *np, char *buffer, int length)
1204 {
1205 char *ptr = buffer;
1206 int len = length;
1207 struct sym_usrcmd cmd, *uc = &cmd;
1208 int arg_len;
1209 u_long target;
1210
1211 memset(uc, 0, sizeof(*uc));
1212
1213 if (len > 0 && ptr[len-1] == '\n')
1214 --len;
1215
1216 if ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1217 uc->cmd = UC_SETSYNC;
1218 else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1219 uc->cmd = UC_SETTAGS;
1220 else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1221 uc->cmd = UC_SETVERBOSE;
1222 else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1223 uc->cmd = UC_SETWIDE;
1224 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1225 else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1226 uc->cmd = UC_SETDEBUG;
1227 #endif
1228 else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1229 uc->cmd = UC_SETFLAG;
1230 else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1231 uc->cmd = UC_RESETDEV;
1232 else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1233 uc->cmd = UC_CLEARDEV;
1234 else
1235 arg_len = 0;
1236
1237 #ifdef DEBUG_PROC_INFO
1238 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1239 #endif
1240
1241 if (!arg_len)
1242 return -EINVAL;
1243 ptr += arg_len; len -= arg_len;
1244
1245 switch(uc->cmd) {
1246 case UC_SETSYNC:
1247 case UC_SETTAGS:
1248 case UC_SETWIDE:
1249 case UC_SETFLAG:
1250 case UC_RESETDEV:
1251 case UC_CLEARDEV:
1252 SKIP_SPACES(ptr, len);
1253 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1254 ptr += arg_len; len -= arg_len;
1255 uc->target = ~0;
1256 } else {
1257 GET_INT_ARG(ptr, len, target);
1258 uc->target = (1<<target);
1259 #ifdef DEBUG_PROC_INFO
1260 printk("sym_user_command: target=%ld\n", target);
1261 #endif
1262 }
1263 break;
1264 }
1265
1266 switch(uc->cmd) {
1267 case UC_SETVERBOSE:
1268 case UC_SETSYNC:
1269 case UC_SETTAGS:
1270 case UC_SETWIDE:
1271 SKIP_SPACES(ptr, len);
1272 GET_INT_ARG(ptr, len, uc->data);
1273 #ifdef DEBUG_PROC_INFO
1274 printk("sym_user_command: data=%ld\n", uc->data);
1275 #endif
1276 break;
1277 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1278 case UC_SETDEBUG:
1279 while (len > 0) {
1280 SKIP_SPACES(ptr, len);
1281 if ((arg_len = is_keyword(ptr, len, "alloc")))
1282 uc->data |= DEBUG_ALLOC;
1283 else if ((arg_len = is_keyword(ptr, len, "phase")))
1284 uc->data |= DEBUG_PHASE;
1285 else if ((arg_len = is_keyword(ptr, len, "queue")))
1286 uc->data |= DEBUG_QUEUE;
1287 else if ((arg_len = is_keyword(ptr, len, "result")))
1288 uc->data |= DEBUG_RESULT;
1289 else if ((arg_len = is_keyword(ptr, len, "scatter")))
1290 uc->data |= DEBUG_SCATTER;
1291 else if ((arg_len = is_keyword(ptr, len, "script")))
1292 uc->data |= DEBUG_SCRIPT;
1293 else if ((arg_len = is_keyword(ptr, len, "tiny")))
1294 uc->data |= DEBUG_TINY;
1295 else if ((arg_len = is_keyword(ptr, len, "timing")))
1296 uc->data |= DEBUG_TIMING;
1297 else if ((arg_len = is_keyword(ptr, len, "nego")))
1298 uc->data |= DEBUG_NEGO;
1299 else if ((arg_len = is_keyword(ptr, len, "tags")))
1300 uc->data |= DEBUG_TAGS;
1301 else if ((arg_len = is_keyword(ptr, len, "pointer")))
1302 uc->data |= DEBUG_POINTER;
1303 else
1304 return -EINVAL;
1305 ptr += arg_len; len -= arg_len;
1306 }
1307 #ifdef DEBUG_PROC_INFO
1308 printk("sym_user_command: data=%ld\n", uc->data);
1309 #endif
1310 break;
1311 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1312 case UC_SETFLAG:
1313 while (len > 0) {
1314 SKIP_SPACES(ptr, len);
1315 if ((arg_len = is_keyword(ptr, len, "no_disc")))
1316 uc->data &= ~SYM_DISC_ENABLED;
1317 else
1318 return -EINVAL;
1319 ptr += arg_len; len -= arg_len;
1320 }
1321 break;
1322 default:
1323 break;
1324 }
1325
1326 if (len)
1327 return -EINVAL;
1328 else {
1329 unsigned long flags;
1330
1331 spin_lock_irqsave(np->s.host->host_lock, flags);
1332 sym_exec_user_command (np, uc);
1333 spin_unlock_irqrestore(np->s.host->host_lock, flags);
1334 }
1335 return length;
1336 }
1337
1338 #endif /* SYM_LINUX_USER_COMMAND_SUPPORT */
1339
1340
1341 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1342 /*
1343 * Informations through the proc file system.
1344 */
1345 struct info_str {
1346 char *buffer;
1347 int length;
1348 int offset;
1349 int pos;
1350 };
1351
1352 static void copy_mem_info(struct info_str *info, char *data, int len)
1353 {
1354 if (info->pos + len > info->length)
1355 len = info->length - info->pos;
1356
1357 if (info->pos + len < info->offset) {
1358 info->pos += len;
1359 return;
1360 }
1361 if (info->pos < info->offset) {
1362 data += (info->offset - info->pos);
1363 len -= (info->offset - info->pos);
1364 }
1365
1366 if (len > 0) {
1367 memcpy(info->buffer + info->pos, data, len);
1368 info->pos += len;
1369 }
1370 }
1371
1372 static int copy_info(struct info_str *info, char *fmt, ...)
1373 {
1374 va_list args;
1375 char buf[81];
1376 int len;
1377
1378 va_start(args, fmt);
1379 len = vsprintf(buf, fmt, args);
1380 va_end(args);
1381
1382 copy_mem_info(info, buf, len);
1383 return len;
1384 }
1385
1386 /*
1387 * Copy formatted information into the input buffer.
1388 */
1389 static int sym_host_info(struct sym_hcb *np, char *ptr, off_t offset, int len)
1390 {
1391 struct info_str info;
1392
1393 info.buffer = ptr;
1394 info.length = len;
1395 info.offset = offset;
1396 info.pos = 0;
1397
1398 copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1399 "revision id 0x%x\n",
1400 np->s.chip_name, np->device_id, np->revision_id);
1401 copy_info(&info, "At PCI address %s, IRQ " IRQ_FMT "\n",
1402 pci_name(np->s.device), IRQ_PRM(np->s.irq));
1403 copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1404 (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1405 np->maxwide ? "Wide" : "Narrow",
1406 np->minsync_dt ? ", DT capable" : "");
1407
1408 copy_info(&info, "Max. started commands %d, "
1409 "max. commands per LUN %d\n",
1410 SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1411
1412 return info.pos > info.offset? info.pos - info.offset : 0;
1413 }
1414 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1415
1416 /*
1417 * Entry point of the scsi proc fs of the driver.
1418 * - func = 0 means read (returns adapter infos)
1419 * - func = 1 means write (not yet merget from sym53c8xx)
1420 */
1421 static int sym53c8xx_proc_info(struct Scsi_Host *host, char *buffer,
1422 char **start, off_t offset, int length, int func)
1423 {
1424 struct sym_hcb *np = sym_get_hcb(host);
1425 int retv;
1426
1427 if (func) {
1428 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1429 retv = sym_user_command(np, buffer, length);
1430 #else
1431 retv = -EINVAL;
1432 #endif
1433 } else {
1434 if (start)
1435 *start = buffer;
1436 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1437 retv = sym_host_info(np, buffer, offset, length);
1438 #else
1439 retv = -EINVAL;
1440 #endif
1441 }
1442
1443 return retv;
1444 }
1445 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1446
1447 /*
1448 * Free controller resources.
1449 */
1450 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev)
1451 {
1452 /*
1453 * Free O/S specific resources.
1454 */
1455 if (np->s.irq)
1456 free_irq(np->s.irq, np);
1457 if (np->s.ioaddr)
1458 pci_iounmap(pdev, np->s.ioaddr);
1459 if (np->s.ramaddr)
1460 pci_iounmap(pdev, np->s.ramaddr);
1461 /*
1462 * Free O/S independent resources.
1463 */
1464 sym_hcb_free(np);
1465
1466 sym_mfree_dma(np, sizeof(*np), "HCB");
1467 }
1468
1469 /*
1470 * Ask/tell the system about DMA addressing.
1471 */
1472 static int sym_setup_bus_dma_mask(struct sym_hcb *np)
1473 {
1474 #if SYM_CONF_DMA_ADDRESSING_MODE > 0
1475 #if SYM_CONF_DMA_ADDRESSING_MODE == 1
1476 #define DMA_DAC_MASK 0x000000ffffffffffULL /* 40-bit */
1477 #elif SYM_CONF_DMA_ADDRESSING_MODE == 2
1478 #define DMA_DAC_MASK DMA_64BIT_MASK
1479 #endif
1480 if ((np->features & FE_DAC) &&
1481 !pci_set_dma_mask(np->s.device, DMA_DAC_MASK)) {
1482 np->use_dac = 1;
1483 return 0;
1484 }
1485 #endif
1486
1487 if (!pci_set_dma_mask(np->s.device, DMA_32BIT_MASK))
1488 return 0;
1489
1490 printf_warning("%s: No suitable DMA available\n", sym_name(np));
1491 return -1;
1492 }
1493
1494 /*
1495 * Host attach and initialisations.
1496 *
1497 * Allocate host data and ncb structure.
1498 * Remap MMIO region.
1499 * Do chip initialization.
1500 * If all is OK, install interrupt handling and
1501 * start the timer daemon.
1502 */
1503 static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1504 int unit, struct sym_device *dev)
1505 {
1506 struct host_data *host_data;
1507 struct sym_hcb *np = NULL;
1508 struct Scsi_Host *instance = NULL;
1509 struct pci_dev *pdev = dev->pdev;
1510 unsigned long flags;
1511 struct sym_fw *fw;
1512
1513 printk(KERN_INFO
1514 "sym%d: <%s> rev 0x%x at pci %s irq " IRQ_FMT "\n",
1515 unit, dev->chip.name, dev->chip.revision_id,
1516 pci_name(pdev), IRQ_PRM(pdev->irq));
1517
1518 /*
1519 * Get the firmware for this chip.
1520 */
1521 fw = sym_find_firmware(&dev->chip);
1522 if (!fw)
1523 goto attach_failed;
1524
1525 /*
1526 * Allocate host_data structure
1527 */
1528 instance = scsi_host_alloc(tpnt, sizeof(*host_data));
1529 if (!instance)
1530 goto attach_failed;
1531 host_data = (struct host_data *) instance->hostdata;
1532
1533 /*
1534 * Allocate immediately the host control block,
1535 * since we are only expecting to succeed. :)
1536 * We keep track in the HCB of all the resources that
1537 * are to be released on error.
1538 */
1539 np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1540 if (!np)
1541 goto attach_failed;
1542 np->s.device = pdev;
1543 np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1544 host_data->ncb = np;
1545 np->s.host = instance;
1546
1547 pci_set_drvdata(pdev, np);
1548
1549 /*
1550 * Copy some useful infos to the HCB.
1551 */
1552 np->hcb_ba = vtobus(np);
1553 np->verbose = sym_driver_setup.verbose;
1554 np->s.device = pdev;
1555 np->s.unit = unit;
1556 np->device_id = dev->chip.device_id;
1557 np->revision_id = dev->chip.revision_id;
1558 np->features = dev->chip.features;
1559 np->clock_divn = dev->chip.nr_divisor;
1560 np->maxoffs = dev->chip.offset_max;
1561 np->maxburst = dev->chip.burst_max;
1562 np->myaddr = dev->host_id;
1563
1564 /*
1565 * Edit its name.
1566 */
1567 strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1568 sprintf(np->s.inst_name, "sym%d", np->s.unit);
1569
1570 if (sym_setup_bus_dma_mask(np))
1571 goto attach_failed;
1572
1573 /*
1574 * Try to map the controller chip to
1575 * virtual and physical memory.
1576 */
1577 np->mmio_ba = (u32)dev->mmio_base;
1578 np->s.ioaddr = dev->s.ioaddr;
1579 np->s.ramaddr = dev->s.ramaddr;
1580 np->s.io_ws = (np->features & FE_IO256) ? 256 : 128;
1581
1582 /*
1583 * Map on-chip RAM if present and supported.
1584 */
1585 if (!(np->features & FE_RAM))
1586 dev->ram_base = 0;
1587 if (dev->ram_base) {
1588 np->ram_ba = (u32)dev->ram_base;
1589 np->ram_ws = (np->features & FE_RAM8K) ? 8192 : 4096;
1590 }
1591
1592 if (sym_hcb_attach(instance, fw, dev->nvram))
1593 goto attach_failed;
1594
1595 /*
1596 * Install the interrupt handler.
1597 * If we synchonize the C code with SCRIPTS on interrupt,
1598 * we do not want to share the INTR line at all.
1599 */
1600 if (request_irq(pdev->irq, sym53c8xx_intr, SA_SHIRQ, NAME53C8XX, np)) {
1601 printf_err("%s: request irq %d failure\n",
1602 sym_name(np), pdev->irq);
1603 goto attach_failed;
1604 }
1605 np->s.irq = pdev->irq;
1606
1607 /*
1608 * After SCSI devices have been opened, we cannot
1609 * reset the bus safely, so we do it here.
1610 */
1611 spin_lock_irqsave(instance->host_lock, flags);
1612 if (sym_reset_scsi_bus(np, 0))
1613 goto reset_failed;
1614
1615 /*
1616 * Start the SCRIPTS.
1617 */
1618 sym_start_up (np, 1);
1619
1620 /*
1621 * Start the timer daemon
1622 */
1623 init_timer(&np->s.timer);
1624 np->s.timer.data = (unsigned long) np;
1625 np->s.timer.function = sym53c8xx_timer;
1626 np->s.lasttime=0;
1627 sym_timer (np);
1628
1629 /*
1630 * Fill Linux host instance structure
1631 * and return success.
1632 */
1633 instance->max_channel = 0;
1634 instance->this_id = np->myaddr;
1635 instance->max_id = np->maxwide ? 16 : 8;
1636 instance->max_lun = SYM_CONF_MAX_LUN;
1637 instance->unique_id = pci_resource_start(pdev, 0);
1638 instance->cmd_per_lun = SYM_CONF_MAX_TAG;
1639 instance->can_queue = (SYM_CONF_MAX_START-2);
1640 instance->sg_tablesize = SYM_CONF_MAX_SG;
1641 instance->max_cmd_len = 16;
1642 BUG_ON(sym2_transport_template == NULL);
1643 instance->transportt = sym2_transport_template;
1644
1645 spin_unlock_irqrestore(instance->host_lock, flags);
1646
1647 return instance;
1648
1649 reset_failed:
1650 printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1651 "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1652 spin_unlock_irqrestore(instance->host_lock, flags);
1653 attach_failed:
1654 if (!instance)
1655 return NULL;
1656 printf_info("%s: giving up ...\n", sym_name(np));
1657 if (np)
1658 sym_free_resources(np, pdev);
1659 scsi_host_put(instance);
1660
1661 return NULL;
1662 }
1663
1664
1665 /*
1666 * Detect and try to read SYMBIOS and TEKRAM NVRAM.
1667 */
1668 #if SYM_CONF_NVRAM_SUPPORT
1669 static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1670 {
1671 devp->nvram = nvp;
1672 devp->device_id = devp->chip.device_id;
1673 nvp->type = 0;
1674
1675 sym_read_nvram(devp, nvp);
1676 }
1677 #else
1678 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1679 {
1680 }
1681 #endif /* SYM_CONF_NVRAM_SUPPORT */
1682
1683 static int __devinit sym_check_supported(struct sym_device *device)
1684 {
1685 struct sym_chip *chip;
1686 struct pci_dev *pdev = device->pdev;
1687 u_char revision;
1688 unsigned long io_port = pci_resource_start(pdev, 0);
1689 int i;
1690
1691 /*
1692 * If user excluded this chip, do not initialize it.
1693 * I hate this code so much. Must kill it.
1694 */
1695 if (io_port) {
1696 for (i = 0 ; i < 8 ; i++) {
1697 if (sym_driver_setup.excludes[i] == io_port)
1698 return -ENODEV;
1699 }
1700 }
1701
1702 /*
1703 * Check if the chip is supported. Then copy the chip description
1704 * to our device structure so we can make it match the actual device
1705 * and options.
1706 */
1707 pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
1708 chip = sym_lookup_chip_table(pdev->device, revision);
1709 if (!chip) {
1710 dev_info(&pdev->dev, "device not supported\n");
1711 return -ENODEV;
1712 }
1713 memcpy(&device->chip, chip, sizeof(device->chip));
1714 device->chip.revision_id = revision;
1715
1716 return 0;
1717 }
1718
1719 /*
1720 * Ignore Symbios chips controlled by various RAID controllers.
1721 * These controllers set value 0x52414944 at RAM end - 16.
1722 */
1723 static int __devinit sym_check_raid(struct sym_device *device)
1724 {
1725 unsigned int ram_size, ram_val;
1726
1727 if (!device->s.ramaddr)
1728 return 0;
1729
1730 if (device->chip.features & FE_RAM8K)
1731 ram_size = 8192;
1732 else
1733 ram_size = 4096;
1734
1735 ram_val = readl(device->s.ramaddr + ram_size - 16);
1736 if (ram_val != 0x52414944)
1737 return 0;
1738
1739 dev_info(&device->pdev->dev,
1740 "not initializing, driven by RAID controller.\n");
1741 return -ENODEV;
1742 }
1743
1744 static int __devinit sym_set_workarounds(struct sym_device *device)
1745 {
1746 struct sym_chip *chip = &device->chip;
1747 struct pci_dev *pdev = device->pdev;
1748 u_short status_reg;
1749
1750 /*
1751 * (ITEM 12 of a DEL about the 896 I haven't yet).
1752 * We must ensure the chip will use WRITE AND INVALIDATE.
1753 * The revision number limit is for now arbitrary.
1754 */
1755 if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && chip->revision_id < 0x4) {
1756 chip->features |= (FE_WRIE | FE_CLSE);
1757 }
1758
1759 /* If the chip can do Memory Write Invalidate, enable it */
1760 if (chip->features & FE_WRIE) {
1761 if (pci_set_mwi(pdev))
1762 return -ENODEV;
1763 }
1764
1765 /*
1766 * Work around for errant bit in 895A. The 66Mhz
1767 * capable bit is set erroneously. Clear this bit.
1768 * (Item 1 DEL 533)
1769 *
1770 * Make sure Config space and Features agree.
1771 *
1772 * Recall: writes are not normal to status register -
1773 * write a 1 to clear and a 0 to leave unchanged.
1774 * Can only reset bits.
1775 */
1776 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1777 if (chip->features & FE_66MHZ) {
1778 if (!(status_reg & PCI_STATUS_66MHZ))
1779 chip->features &= ~FE_66MHZ;
1780 } else {
1781 if (status_reg & PCI_STATUS_66MHZ) {
1782 status_reg = PCI_STATUS_66MHZ;
1783 pci_write_config_word(pdev, PCI_STATUS, status_reg);
1784 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1785 }
1786 }
1787
1788 return 0;
1789 }
1790
1791 /*
1792 * Read and check the PCI configuration for any detected NCR
1793 * boards and save data for attaching after all boards have
1794 * been detected.
1795 */
1796 static void __devinit
1797 sym_init_device(struct pci_dev *pdev, struct sym_device *device)
1798 {
1799 int i;
1800
1801 device->host_id = SYM_SETUP_HOST_ID;
1802 device->pdev = pdev;
1803
1804 i = pci_get_base_address(pdev, 1, &device->mmio_base);
1805 pci_get_base_address(pdev, i, &device->ram_base);
1806
1807 #ifndef CONFIG_SCSI_SYM53C8XX_IOMAPPED
1808 if (device->mmio_base)
1809 device->s.ioaddr = pci_iomap(pdev, 1,
1810 pci_resource_len(pdev, 1));
1811 #endif
1812 if (!device->s.ioaddr)
1813 device->s.ioaddr = pci_iomap(pdev, 0,
1814 pci_resource_len(pdev, 0));
1815 if (device->ram_base)
1816 device->s.ramaddr = pci_iomap(pdev, i,
1817 pci_resource_len(pdev, i));
1818 }
1819
1820 /*
1821 * The NCR PQS and PDS cards are constructed as a DEC bridge
1822 * behind which sits a proprietary NCR memory controller and
1823 * either four or two 53c875s as separate devices. We can tell
1824 * if an 875 is part of a PQS/PDS or not since if it is, it will
1825 * be on the same bus as the memory controller. In its usual
1826 * mode of operation, the 875s are slaved to the memory
1827 * controller for all transfers. To operate with the Linux
1828 * driver, the memory controller is disabled and the 875s
1829 * freed to function independently. The only wrinkle is that
1830 * the preset SCSI ID (which may be zero) must be read in from
1831 * a special configuration space register of the 875.
1832 */
1833 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1834 {
1835 int slot;
1836 u8 tmp;
1837
1838 for (slot = 0; slot < 256; slot++) {
1839 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1840
1841 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1842 pci_dev_put(memc);
1843 continue;
1844 }
1845
1846 /* bit 1: allow individual 875 configuration */
1847 pci_read_config_byte(memc, 0x44, &tmp);
1848 if ((tmp & 0x2) == 0) {
1849 tmp |= 0x2;
1850 pci_write_config_byte(memc, 0x44, tmp);
1851 }
1852
1853 /* bit 2: drive individual 875 interrupts to the bus */
1854 pci_read_config_byte(memc, 0x45, &tmp);
1855 if ((tmp & 0x4) == 0) {
1856 tmp |= 0x4;
1857 pci_write_config_byte(memc, 0x45, tmp);
1858 }
1859
1860 pci_dev_put(memc);
1861 break;
1862 }
1863
1864 pci_read_config_byte(pdev, 0x84, &tmp);
1865 sym_dev->host_id = tmp;
1866 }
1867
1868 /*
1869 * Called before unloading the module.
1870 * Detach the host.
1871 * We have to free resources and halt the NCR chip.
1872 */
1873 static int sym_detach(struct sym_hcb *np, struct pci_dev *pdev)
1874 {
1875 printk("%s: detaching ...\n", sym_name(np));
1876
1877 del_timer_sync(&np->s.timer);
1878
1879 /*
1880 * Reset NCR chip.
1881 * We should use sym_soft_reset(), but we don't want to do
1882 * so, since we may not be safe if interrupts occur.
1883 */
1884 printk("%s: resetting chip\n", sym_name(np));
1885 OUTB(np, nc_istat, SRST);
1886 INB(np, nc_mbox1);
1887 udelay(10);
1888 OUTB(np, nc_istat, 0);
1889
1890 sym_free_resources(np, pdev);
1891
1892 return 1;
1893 }
1894
1895 /*
1896 * Driver host template.
1897 */
1898 static struct scsi_host_template sym2_template = {
1899 .module = THIS_MODULE,
1900 .name = "sym53c8xx",
1901 .info = sym53c8xx_info,
1902 .queuecommand = sym53c8xx_queue_command,
1903 .slave_alloc = sym53c8xx_slave_alloc,
1904 .slave_configure = sym53c8xx_slave_configure,
1905 .eh_abort_handler = sym53c8xx_eh_abort_handler,
1906 .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1907 .eh_bus_reset_handler = sym53c8xx_eh_bus_reset_handler,
1908 .eh_host_reset_handler = sym53c8xx_eh_host_reset_handler,
1909 .this_id = 7,
1910 .use_clustering = DISABLE_CLUSTERING,
1911 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1912 .proc_info = sym53c8xx_proc_info,
1913 .proc_name = NAME53C8XX,
1914 #endif
1915 };
1916
1917 static int attach_count;
1918
1919 static int __devinit sym2_probe(struct pci_dev *pdev,
1920 const struct pci_device_id *ent)
1921 {
1922 struct sym_device sym_dev;
1923 struct sym_nvram nvram;
1924 struct Scsi_Host *instance;
1925
1926 memset(&sym_dev, 0, sizeof(sym_dev));
1927 memset(&nvram, 0, sizeof(nvram));
1928
1929 if (pci_enable_device(pdev))
1930 goto leave;
1931
1932 pci_set_master(pdev);
1933
1934 if (pci_request_regions(pdev, NAME53C8XX))
1935 goto disable;
1936
1937 sym_init_device(pdev, &sym_dev);
1938 if (sym_check_supported(&sym_dev))
1939 goto free;
1940
1941 if (sym_check_raid(&sym_dev))
1942 goto leave; /* Don't disable the device */
1943
1944 if (sym_set_workarounds(&sym_dev))
1945 goto free;
1946
1947 sym_config_pqs(pdev, &sym_dev);
1948
1949 sym_get_nvram(&sym_dev, &nvram);
1950
1951 instance = sym_attach(&sym2_template, attach_count, &sym_dev);
1952 if (!instance)
1953 goto free;
1954
1955 if (scsi_add_host(instance, &pdev->dev))
1956 goto detach;
1957 scsi_scan_host(instance);
1958
1959 attach_count++;
1960
1961 return 0;
1962
1963 detach:
1964 sym_detach(pci_get_drvdata(pdev), pdev);
1965 free:
1966 pci_release_regions(pdev);
1967 disable:
1968 pci_disable_device(pdev);
1969 leave:
1970 return -ENODEV;
1971 }
1972
1973 static void __devexit sym2_remove(struct pci_dev *pdev)
1974 {
1975 struct sym_hcb *np = pci_get_drvdata(pdev);
1976 struct Scsi_Host *host = np->s.host;
1977
1978 scsi_remove_host(host);
1979 scsi_host_put(host);
1980
1981 sym_detach(np, pdev);
1982
1983 pci_release_regions(pdev);
1984 pci_disable_device(pdev);
1985
1986 attach_count--;
1987 }
1988
1989 static void sym2_get_signalling(struct Scsi_Host *shost)
1990 {
1991 struct sym_hcb *np = sym_get_hcb(shost);
1992 enum spi_signal_type type;
1993
1994 switch (np->scsi_mode) {
1995 case SMODE_SE:
1996 type = SPI_SIGNAL_SE;
1997 break;
1998 case SMODE_LVD:
1999 type = SPI_SIGNAL_LVD;
2000 break;
2001 case SMODE_HVD:
2002 type = SPI_SIGNAL_HVD;
2003 break;
2004 default:
2005 type = SPI_SIGNAL_UNKNOWN;
2006 break;
2007 }
2008 spi_signalling(shost) = type;
2009 }
2010
2011 static void sym2_set_offset(struct scsi_target *starget, int offset)
2012 {
2013 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2014 struct sym_hcb *np = sym_get_hcb(shost);
2015 struct sym_tcb *tp = &np->target[starget->id];
2016
2017 tp->tgoal.offset = offset;
2018 tp->tgoal.check_nego = 1;
2019 }
2020
2021 static void sym2_set_period(struct scsi_target *starget, int period)
2022 {
2023 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2024 struct sym_hcb *np = sym_get_hcb(shost);
2025 struct sym_tcb *tp = &np->target[starget->id];
2026
2027 /* have to have DT for these transfers, but DT will also
2028 * set width, so check that this is allowed */
2029 if (period <= np->minsync && spi_width(starget))
2030 tp->tgoal.dt = 1;
2031
2032 tp->tgoal.period = period;
2033 tp->tgoal.check_nego = 1;
2034 }
2035
2036 static void sym2_set_width(struct scsi_target *starget, int width)
2037 {
2038 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2039 struct sym_hcb *np = sym_get_hcb(shost);
2040 struct sym_tcb *tp = &np->target[starget->id];
2041
2042 /* It is illegal to have DT set on narrow transfers. If DT is
2043 * clear, we must also clear IU and QAS. */
2044 if (width == 0)
2045 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2046
2047 tp->tgoal.width = width;
2048 tp->tgoal.check_nego = 1;
2049 }
2050
2051 static void sym2_set_dt(struct scsi_target *starget, int dt)
2052 {
2053 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2054 struct sym_hcb *np = sym_get_hcb(shost);
2055 struct sym_tcb *tp = &np->target[starget->id];
2056
2057 /* We must clear QAS and IU if DT is clear */
2058 if (dt)
2059 tp->tgoal.dt = 1;
2060 else
2061 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2062 tp->tgoal.check_nego = 1;
2063 }
2064
2065 static void sym2_set_iu(struct scsi_target *starget, int iu)
2066 {
2067 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2068 struct sym_hcb *np = sym_get_hcb(shost);
2069 struct sym_tcb *tp = &np->target[starget->id];
2070
2071 if (iu)
2072 tp->tgoal.iu = tp->tgoal.dt = 1;
2073 else
2074 tp->tgoal.iu = 0;
2075 tp->tgoal.check_nego = 1;
2076 }
2077
2078 static void sym2_set_qas(struct scsi_target *starget, int qas)
2079 {
2080 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2081 struct sym_hcb *np = sym_get_hcb(shost);
2082 struct sym_tcb *tp = &np->target[starget->id];
2083
2084 if (qas)
2085 tp->tgoal.dt = tp->tgoal.qas = 1;
2086 else
2087 tp->tgoal.qas = 0;
2088 tp->tgoal.check_nego = 1;
2089 }
2090
2091
2092 static struct spi_function_template sym2_transport_functions = {
2093 .set_offset = sym2_set_offset,
2094 .show_offset = 1,
2095 .set_period = sym2_set_period,
2096 .show_period = 1,
2097 .set_width = sym2_set_width,
2098 .show_width = 1,
2099 .set_dt = sym2_set_dt,
2100 .show_dt = 1,
2101 .set_iu = sym2_set_iu,
2102 .show_iu = 1,
2103 .set_qas = sym2_set_qas,
2104 .show_qas = 1,
2105 .get_signalling = sym2_get_signalling,
2106 };
2107
2108 static struct pci_device_id sym2_id_table[] __devinitdata = {
2109 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2110 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2111 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2112 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2113 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2114 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2115 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2116 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2117 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2118 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2119 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2120 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2121 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2122 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2123 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2124 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2125 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2126 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2127 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2128 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2129 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2130 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2131 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2132 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2133 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2134 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2135 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2136 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2137 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2138 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2139 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2140 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2141 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2142 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2143 { 0, }
2144 };
2145
2146 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2147
2148 static struct pci_driver sym2_driver = {
2149 .name = NAME53C8XX,
2150 .id_table = sym2_id_table,
2151 .probe = sym2_probe,
2152 .remove = __devexit_p(sym2_remove),
2153 };
2154
2155 static int __init sym2_init(void)
2156 {
2157 int error;
2158
2159 sym2_setup_params();
2160 sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2161 if (!sym2_transport_template)
2162 return -ENODEV;
2163
2164 error = pci_register_driver(&sym2_driver);
2165 if (error)
2166 spi_release_transport(sym2_transport_template);
2167 return error;
2168 }
2169
2170 static void __exit sym2_exit(void)
2171 {
2172 pci_unregister_driver(&sym2_driver);
2173 spi_release_transport(sym2_transport_template);
2174 }
2175
2176 module_init(sym2_init);
2177 module_exit(sym2_exit);
Linux kernel - Deliverables
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