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[PATCH] W1: w1_netlink: New init/fini netlink callbacks.
[linux-2.6/verdex.git] / drivers / scsi / sym53c8xx_2 / sym_glue.c
blobd76766c3ce1643158ecc27a29dc157d0d36c9ea4
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 int rc;
860
861 spin_lock_irq(cmd->device->host->host_lock);
862 rc = sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
863 spin_unlock_irq(cmd->device->host->host_lock);
864
865 return rc;
866 }
867
868 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
869 {
870 int rc;
871
872 spin_lock_irq(cmd->device->host->host_lock);
873 rc = sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
874 spin_unlock_irq(cmd->device->host->host_lock);
875
876 return rc;
877 }
878
879 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
880 {
881 int rc;
882
883 spin_lock_irq(cmd->device->host->host_lock);
884 rc = sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
885 spin_unlock_irq(cmd->device->host->host_lock);
886
887 return rc;
888 }
889
890 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
891 {
892 int rc;
893
894 spin_lock_irq(cmd->device->host->host_lock);
895 rc = sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
896 spin_unlock_irq(cmd->device->host->host_lock);
897
898 return rc;
899 }
900
901 /*
902 * Tune device queuing depth, according to various limits.
903 */
904 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
905 {
906 struct sym_lcb *lp = sym_lp(tp, lun);
907 u_short oldtags;
908
909 if (!lp)
910 return;
911
912 oldtags = lp->s.reqtags;
913
914 if (reqtags > lp->s.scdev_depth)
915 reqtags = lp->s.scdev_depth;
916
917 lp->started_limit = reqtags ? reqtags : 2;
918 lp->started_max = 1;
919 lp->s.reqtags = reqtags;
920
921 if (reqtags != oldtags) {
922 dev_info(&tp->starget->dev,
923 "tagged command queuing %s, command queue depth %d.\n",
924 lp->s.reqtags ? "enabled" : "disabled",
925 lp->started_limit);
926 }
927 }
928
929 /*
930 * Linux select queue depths function
931 */
932 #define DEF_DEPTH (sym_driver_setup.max_tag)
933 #define ALL_TARGETS -2
934 #define NO_TARGET -1
935 #define ALL_LUNS -2
936 #define NO_LUN -1
937
938 static int device_queue_depth(struct sym_hcb *np, int target, int lun)
939 {
940 int c, h, t, u, v;
941 char *p = sym_driver_setup.tag_ctrl;
942 char *ep;
943
944 h = -1;
945 t = NO_TARGET;
946 u = NO_LUN;
947 while ((c = *p++) != 0) {
948 v = simple_strtoul(p, &ep, 0);
949 switch(c) {
950 case '/':
951 ++h;
952 t = ALL_TARGETS;
953 u = ALL_LUNS;
954 break;
955 case 't':
956 if (t != target)
957 t = (target == v) ? v : NO_TARGET;
958 u = ALL_LUNS;
959 break;
960 case 'u':
961 if (u != lun)
962 u = (lun == v) ? v : NO_LUN;
963 break;
964 case 'q':
965 if (h == np->s.unit &&
966 (t == ALL_TARGETS || t == target) &&
967 (u == ALL_LUNS || u == lun))
968 return v;
969 break;
970 case '-':
971 t = ALL_TARGETS;
972 u = ALL_LUNS;
973 break;
974 default:
975 break;
976 }
977 p = ep;
978 }
979 return DEF_DEPTH;
980 }
981
982 static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
983 {
984 struct sym_hcb *np;
985 struct sym_tcb *tp;
986
987 if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
988 return -ENXIO;
989
990 np = sym_get_hcb(sdev->host);
991 tp = &np->target[sdev->id];
992
993 /*
994 * Fail the device init if the device is flagged NOSCAN at BOOT in
995 * the NVRAM. This may speed up boot and maintain coherency with
996 * BIOS device numbering. Clearing the flag allows the user to
997 * rescan skipped devices later. We also return an error for
998 * devices not flagged for SCAN LUNS in the NVRAM since some single
999 * lun devices behave badly when asked for a non zero LUN.
1000 */
1001
1002 if ((tp->usrflags & SYM_SCAN_BOOT_DISABLED) ||
1003 ((tp->usrflags & SYM_SCAN_LUNS_DISABLED) && sdev->lun != 0)) {
1004 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
1005 return -ENXIO;
1006 }
1007
1008 tp->starget = sdev->sdev_target;
1009 return 0;
1010 }
1011
1012 /*
1013 * Linux entry point for device queue sizing.
1014 */
1015 static int sym53c8xx_slave_configure(struct scsi_device *device)
1016 {
1017 struct sym_hcb *np = sym_get_hcb(device->host);
1018 struct sym_tcb *tp = &np->target[device->id];
1019 struct sym_lcb *lp;
1020 int reqtags, depth_to_use;
1021
1022 /*
1023 * Allocate the LCB if not yet.
1024 * If it fail, we may well be in the sh*t. :)
1025 */
1026 lp = sym_alloc_lcb(np, device->id, device->lun);
1027 if (!lp)
1028 return -ENOMEM;
1029
1030 /*
1031 * Get user flags.
1032 */
1033 lp->curr_flags = lp->user_flags;
1034
1035 /*
1036 * Select queue depth from driver setup.
1037 * Donnot use more than configured by user.
1038 * Use at least 2.
1039 * Donnot use more than our maximum.
1040 */
1041 reqtags = device_queue_depth(np, device->id, device->lun);
1042 if (reqtags > tp->usrtags)
1043 reqtags = tp->usrtags;
1044 if (!device->tagged_supported)
1045 reqtags = 0;
1046 #if 1 /* Avoid to locally queue commands for no good reasons */
1047 if (reqtags > SYM_CONF_MAX_TAG)
1048 reqtags = SYM_CONF_MAX_TAG;
1049 depth_to_use = (reqtags ? reqtags : 2);
1050 #else
1051 depth_to_use = (reqtags ? SYM_CONF_MAX_TAG : 2);
1052 #endif
1053 scsi_adjust_queue_depth(device,
1054 (device->tagged_supported ?
1055 MSG_SIMPLE_TAG : 0),
1056 depth_to_use);
1057 lp->s.scdev_depth = depth_to_use;
1058 sym_tune_dev_queuing(tp, device->lun, reqtags);
1059
1060 if (!spi_initial_dv(device->sdev_target))
1061 spi_dv_device(device);
1062
1063 return 0;
1064 }
1065
1066 /*
1067 * Linux entry point for info() function
1068 */
1069 static const char *sym53c8xx_info (struct Scsi_Host *host)
1070 {
1071 return SYM_DRIVER_NAME;
1072 }
1073
1074
1075 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1076 /*
1077 * Proc file system stuff
1078 *
1079 * A read operation returns adapter information.
1080 * A write operation is a control command.
1081 * The string is parsed in the driver code and the command is passed
1082 * to the sym_usercmd() function.
1083 */
1084
1085 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1086
1087 struct sym_usrcmd {
1088 u_long target;
1089 u_long lun;
1090 u_long data;
1091 u_long cmd;
1092 };
1093
1094 #define UC_SETSYNC 10
1095 #define UC_SETTAGS 11
1096 #define UC_SETDEBUG 12
1097 #define UC_SETWIDE 14
1098 #define UC_SETFLAG 15
1099 #define UC_SETVERBOSE 17
1100 #define UC_RESETDEV 18
1101 #define UC_CLEARDEV 19
1102
1103 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
1104 {
1105 struct sym_tcb *tp;
1106 int t, l;
1107
1108 switch (uc->cmd) {
1109 case 0: return;
1110
1111 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1112 case UC_SETDEBUG:
1113 sym_debug_flags = uc->data;
1114 break;
1115 #endif
1116 case UC_SETVERBOSE:
1117 np->verbose = uc->data;
1118 break;
1119 default:
1120 /*
1121 * We assume that other commands apply to targets.
1122 * This should always be the case and avoid the below
1123 * 4 lines to be repeated 6 times.
1124 */
1125 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
1126 if (!((uc->target >> t) & 1))
1127 continue;
1128 tp = &np->target[t];
1129
1130 switch (uc->cmd) {
1131
1132 case UC_SETSYNC:
1133 if (!uc->data || uc->data >= 255) {
1134 tp->tgoal.iu = tp->tgoal.dt =
1135 tp->tgoal.qas = 0;
1136 tp->tgoal.offset = 0;
1137 } else if (uc->data <= 9 && np->minsync_dt) {
1138 if (uc->data < np->minsync_dt)
1139 uc->data = np->minsync_dt;
1140 tp->tgoal.iu = tp->tgoal.dt =
1141 tp->tgoal.qas = 1;
1142 tp->tgoal.width = 1;
1143 tp->tgoal.period = uc->data;
1144 tp->tgoal.offset = np->maxoffs_dt;
1145 } else {
1146 if (uc->data < np->minsync)
1147 uc->data = np->minsync;
1148 tp->tgoal.iu = tp->tgoal.dt =
1149 tp->tgoal.qas = 0;
1150 tp->tgoal.period = uc->data;
1151 tp->tgoal.offset = np->maxoffs;
1152 }
1153 tp->tgoal.check_nego = 1;
1154 break;
1155 case UC_SETWIDE:
1156 tp->tgoal.width = uc->data ? 1 : 0;
1157 tp->tgoal.check_nego = 1;
1158 break;
1159 case UC_SETTAGS:
1160 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
1161 sym_tune_dev_queuing(tp, l, uc->data);
1162 break;
1163 case UC_RESETDEV:
1164 tp->to_reset = 1;
1165 np->istat_sem = SEM;
1166 OUTB(np, nc_istat, SIGP|SEM);
1167 break;
1168 case UC_CLEARDEV:
1169 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
1170 struct sym_lcb *lp = sym_lp(tp, l);
1171 if (lp) lp->to_clear = 1;
1172 }
1173 np->istat_sem = SEM;
1174 OUTB(np, nc_istat, SIGP|SEM);
1175 break;
1176 case UC_SETFLAG:
1177 tp->usrflags = uc->data;
1178 break;
1179 }
1180 }
1181 break;
1182 }
1183 }
1184
1185 static int skip_spaces(char *ptr, int len)
1186 {
1187 int cnt, c;
1188
1189 for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
1190
1191 return (len - cnt);
1192 }
1193
1194 static int get_int_arg(char *ptr, int len, u_long *pv)
1195 {
1196 char *end;
1197
1198 *pv = simple_strtoul(ptr, &end, 10);
1199 return (end - ptr);
1200 }
1201
1202 static int is_keyword(char *ptr, int len, char *verb)
1203 {
1204 int verb_len = strlen(verb);
1205
1206 if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1207 return verb_len;
1208 else
1209 return 0;
1210 }
1211
1212 #define SKIP_SPACES(ptr, len) \
1213 if ((arg_len = skip_spaces(ptr, len)) < 1) \
1214 return -EINVAL; \
1215 ptr += arg_len; len -= arg_len;
1216
1217 #define GET_INT_ARG(ptr, len, v) \
1218 if (!(arg_len = get_int_arg(ptr, len, &(v)))) \
1219 return -EINVAL; \
1220 ptr += arg_len; len -= arg_len;
1221
1222
1223 /*
1224 * Parse a control command
1225 */
1226
1227 static int sym_user_command(struct sym_hcb *np, char *buffer, int length)
1228 {
1229 char *ptr = buffer;
1230 int len = length;
1231 struct sym_usrcmd cmd, *uc = &cmd;
1232 int arg_len;
1233 u_long target;
1234
1235 memset(uc, 0, sizeof(*uc));
1236
1237 if (len > 0 && ptr[len-1] == '\n')
1238 --len;
1239
1240 if ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1241 uc->cmd = UC_SETSYNC;
1242 else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1243 uc->cmd = UC_SETTAGS;
1244 else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1245 uc->cmd = UC_SETVERBOSE;
1246 else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1247 uc->cmd = UC_SETWIDE;
1248 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1249 else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1250 uc->cmd = UC_SETDEBUG;
1251 #endif
1252 else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1253 uc->cmd = UC_SETFLAG;
1254 else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1255 uc->cmd = UC_RESETDEV;
1256 else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1257 uc->cmd = UC_CLEARDEV;
1258 else
1259 arg_len = 0;
1260
1261 #ifdef DEBUG_PROC_INFO
1262 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1263 #endif
1264
1265 if (!arg_len)
1266 return -EINVAL;
1267 ptr += arg_len; len -= arg_len;
1268
1269 switch(uc->cmd) {
1270 case UC_SETSYNC:
1271 case UC_SETTAGS:
1272 case UC_SETWIDE:
1273 case UC_SETFLAG:
1274 case UC_RESETDEV:
1275 case UC_CLEARDEV:
1276 SKIP_SPACES(ptr, len);
1277 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1278 ptr += arg_len; len -= arg_len;
1279 uc->target = ~0;
1280 } else {
1281 GET_INT_ARG(ptr, len, target);
1282 uc->target = (1<<target);
1283 #ifdef DEBUG_PROC_INFO
1284 printk("sym_user_command: target=%ld\n", target);
1285 #endif
1286 }
1287 break;
1288 }
1289
1290 switch(uc->cmd) {
1291 case UC_SETVERBOSE:
1292 case UC_SETSYNC:
1293 case UC_SETTAGS:
1294 case UC_SETWIDE:
1295 SKIP_SPACES(ptr, len);
1296 GET_INT_ARG(ptr, len, uc->data);
1297 #ifdef DEBUG_PROC_INFO
1298 printk("sym_user_command: data=%ld\n", uc->data);
1299 #endif
1300 break;
1301 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1302 case UC_SETDEBUG:
1303 while (len > 0) {
1304 SKIP_SPACES(ptr, len);
1305 if ((arg_len = is_keyword(ptr, len, "alloc")))
1306 uc->data |= DEBUG_ALLOC;
1307 else if ((arg_len = is_keyword(ptr, len, "phase")))
1308 uc->data |= DEBUG_PHASE;
1309 else if ((arg_len = is_keyword(ptr, len, "queue")))
1310 uc->data |= DEBUG_QUEUE;
1311 else if ((arg_len = is_keyword(ptr, len, "result")))
1312 uc->data |= DEBUG_RESULT;
1313 else if ((arg_len = is_keyword(ptr, len, "scatter")))
1314 uc->data |= DEBUG_SCATTER;
1315 else if ((arg_len = is_keyword(ptr, len, "script")))
1316 uc->data |= DEBUG_SCRIPT;
1317 else if ((arg_len = is_keyword(ptr, len, "tiny")))
1318 uc->data |= DEBUG_TINY;
1319 else if ((arg_len = is_keyword(ptr, len, "timing")))
1320 uc->data |= DEBUG_TIMING;
1321 else if ((arg_len = is_keyword(ptr, len, "nego")))
1322 uc->data |= DEBUG_NEGO;
1323 else if ((arg_len = is_keyword(ptr, len, "tags")))
1324 uc->data |= DEBUG_TAGS;
1325 else if ((arg_len = is_keyword(ptr, len, "pointer")))
1326 uc->data |= DEBUG_POINTER;
1327 else
1328 return -EINVAL;
1329 ptr += arg_len; len -= arg_len;
1330 }
1331 #ifdef DEBUG_PROC_INFO
1332 printk("sym_user_command: data=%ld\n", uc->data);
1333 #endif
1334 break;
1335 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1336 case UC_SETFLAG:
1337 while (len > 0) {
1338 SKIP_SPACES(ptr, len);
1339 if ((arg_len = is_keyword(ptr, len, "no_disc")))
1340 uc->data &= ~SYM_DISC_ENABLED;
1341 else
1342 return -EINVAL;
1343 ptr += arg_len; len -= arg_len;
1344 }
1345 break;
1346 default:
1347 break;
1348 }
1349
1350 if (len)
1351 return -EINVAL;
1352 else {
1353 unsigned long flags;
1354
1355 spin_lock_irqsave(np->s.host->host_lock, flags);
1356 sym_exec_user_command (np, uc);
1357 spin_unlock_irqrestore(np->s.host->host_lock, flags);
1358 }
1359 return length;
1360 }
1361
1362 #endif /* SYM_LINUX_USER_COMMAND_SUPPORT */
1363
1364
1365 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1366 /*
1367 * Informations through the proc file system.
1368 */
1369 struct info_str {
1370 char *buffer;
1371 int length;
1372 int offset;
1373 int pos;
1374 };
1375
1376 static void copy_mem_info(struct info_str *info, char *data, int len)
1377 {
1378 if (info->pos + len > info->length)
1379 len = info->length - info->pos;
1380
1381 if (info->pos + len < info->offset) {
1382 info->pos += len;
1383 return;
1384 }
1385 if (info->pos < info->offset) {
1386 data += (info->offset - info->pos);
1387 len -= (info->offset - info->pos);
1388 }
1389
1390 if (len > 0) {
1391 memcpy(info->buffer + info->pos, data, len);
1392 info->pos += len;
1393 }
1394 }
1395
1396 static int copy_info(struct info_str *info, char *fmt, ...)
1397 {
1398 va_list args;
1399 char buf[81];
1400 int len;
1401
1402 va_start(args, fmt);
1403 len = vsprintf(buf, fmt, args);
1404 va_end(args);
1405
1406 copy_mem_info(info, buf, len);
1407 return len;
1408 }
1409
1410 /*
1411 * Copy formatted information into the input buffer.
1412 */
1413 static int sym_host_info(struct sym_hcb *np, char *ptr, off_t offset, int len)
1414 {
1415 struct info_str info;
1416
1417 info.buffer = ptr;
1418 info.length = len;
1419 info.offset = offset;
1420 info.pos = 0;
1421
1422 copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1423 "revision id 0x%x\n",
1424 np->s.chip_name, np->device_id, np->revision_id);
1425 copy_info(&info, "At PCI address %s, IRQ " IRQ_FMT "\n",
1426 pci_name(np->s.device), IRQ_PRM(np->s.irq));
1427 copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1428 (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1429 np->maxwide ? "Wide" : "Narrow",
1430 np->minsync_dt ? ", DT capable" : "");
1431
1432 copy_info(&info, "Max. started commands %d, "
1433 "max. commands per LUN %d\n",
1434 SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1435
1436 return info.pos > info.offset? info.pos - info.offset : 0;
1437 }
1438 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1439
1440 /*
1441 * Entry point of the scsi proc fs of the driver.
1442 * - func = 0 means read (returns adapter infos)
1443 * - func = 1 means write (not yet merget from sym53c8xx)
1444 */
1445 static int sym53c8xx_proc_info(struct Scsi_Host *host, char *buffer,
1446 char **start, off_t offset, int length, int func)
1447 {
1448 struct sym_hcb *np = sym_get_hcb(host);
1449 int retv;
1450
1451 if (func) {
1452 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1453 retv = sym_user_command(np, buffer, length);
1454 #else
1455 retv = -EINVAL;
1456 #endif
1457 } else {
1458 if (start)
1459 *start = buffer;
1460 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1461 retv = sym_host_info(np, buffer, offset, length);
1462 #else
1463 retv = -EINVAL;
1464 #endif
1465 }
1466
1467 return retv;
1468 }
1469 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1470
1471 /*
1472 * Free controller resources.
1473 */
1474 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev)
1475 {
1476 /*
1477 * Free O/S specific resources.
1478 */
1479 if (np->s.irq)
1480 free_irq(np->s.irq, np);
1481 if (np->s.ioaddr)
1482 pci_iounmap(pdev, np->s.ioaddr);
1483 if (np->s.ramaddr)
1484 pci_iounmap(pdev, np->s.ramaddr);
1485 /*
1486 * Free O/S independent resources.
1487 */
1488 sym_hcb_free(np);
1489
1490 sym_mfree_dma(np, sizeof(*np), "HCB");
1491 }
1492
1493 /*
1494 * Ask/tell the system about DMA addressing.
1495 */
1496 static int sym_setup_bus_dma_mask(struct sym_hcb *np)
1497 {
1498 #if SYM_CONF_DMA_ADDRESSING_MODE > 0
1499 #if SYM_CONF_DMA_ADDRESSING_MODE == 1
1500 #define DMA_DAC_MASK 0x000000ffffffffffULL /* 40-bit */
1501 #elif SYM_CONF_DMA_ADDRESSING_MODE == 2
1502 #define DMA_DAC_MASK DMA_64BIT_MASK
1503 #endif
1504 if ((np->features & FE_DAC) &&
1505 !pci_set_dma_mask(np->s.device, DMA_DAC_MASK)) {
1506 np->use_dac = 1;
1507 return 0;
1508 }
1509 #endif
1510
1511 if (!pci_set_dma_mask(np->s.device, DMA_32BIT_MASK))
1512 return 0;
1513
1514 printf_warning("%s: No suitable DMA available\n", sym_name(np));
1515 return -1;
1516 }
1517
1518 /*
1519 * Host attach and initialisations.
1520 *
1521 * Allocate host data and ncb structure.
1522 * Remap MMIO region.
1523 * Do chip initialization.
1524 * If all is OK, install interrupt handling and
1525 * start the timer daemon.
1526 */
1527 static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1528 int unit, struct sym_device *dev)
1529 {
1530 struct host_data *host_data;
1531 struct sym_hcb *np = NULL;
1532 struct Scsi_Host *instance = NULL;
1533 struct pci_dev *pdev = dev->pdev;
1534 unsigned long flags;
1535 struct sym_fw *fw;
1536
1537 printk(KERN_INFO
1538 "sym%d: <%s> rev 0x%x at pci %s irq " IRQ_FMT "\n",
1539 unit, dev->chip.name, dev->chip.revision_id,
1540 pci_name(pdev), IRQ_PRM(pdev->irq));
1541
1542 /*
1543 * Get the firmware for this chip.
1544 */
1545 fw = sym_find_firmware(&dev->chip);
1546 if (!fw)
1547 goto attach_failed;
1548
1549 /*
1550 * Allocate host_data structure
1551 */
1552 instance = scsi_host_alloc(tpnt, sizeof(*host_data));
1553 if (!instance)
1554 goto attach_failed;
1555 host_data = (struct host_data *) instance->hostdata;
1556
1557 /*
1558 * Allocate immediately the host control block,
1559 * since we are only expecting to succeed. :)
1560 * We keep track in the HCB of all the resources that
1561 * are to be released on error.
1562 */
1563 np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1564 if (!np)
1565 goto attach_failed;
1566 np->s.device = pdev;
1567 np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1568 host_data->ncb = np;
1569 np->s.host = instance;
1570
1571 pci_set_drvdata(pdev, np);
1572
1573 /*
1574 * Copy some useful infos to the HCB.
1575 */
1576 np->hcb_ba = vtobus(np);
1577 np->verbose = sym_driver_setup.verbose;
1578 np->s.device = pdev;
1579 np->s.unit = unit;
1580 np->device_id = dev->chip.device_id;
1581 np->revision_id = dev->chip.revision_id;
1582 np->features = dev->chip.features;
1583 np->clock_divn = dev->chip.nr_divisor;
1584 np->maxoffs = dev->chip.offset_max;
1585 np->maxburst = dev->chip.burst_max;
1586 np->myaddr = dev->host_id;
1587
1588 /*
1589 * Edit its name.
1590 */
1591 strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1592 sprintf(np->s.inst_name, "sym%d", np->s.unit);
1593
1594 if (sym_setup_bus_dma_mask(np))
1595 goto attach_failed;
1596
1597 /*
1598 * Try to map the controller chip to
1599 * virtual and physical memory.
1600 */
1601 np->mmio_ba = (u32)dev->mmio_base;
1602 np->s.ioaddr = dev->s.ioaddr;
1603 np->s.ramaddr = dev->s.ramaddr;
1604 np->s.io_ws = (np->features & FE_IO256) ? 256 : 128;
1605
1606 /*
1607 * Map on-chip RAM if present and supported.
1608 */
1609 if (!(np->features & FE_RAM))
1610 dev->ram_base = 0;
1611 if (dev->ram_base) {
1612 np->ram_ba = (u32)dev->ram_base;
1613 np->ram_ws = (np->features & FE_RAM8K) ? 8192 : 4096;
1614 }
1615
1616 if (sym_hcb_attach(instance, fw, dev->nvram))
1617 goto attach_failed;
1618
1619 /*
1620 * Install the interrupt handler.
1621 * If we synchonize the C code with SCRIPTS on interrupt,
1622 * we do not want to share the INTR line at all.
1623 */
1624 if (request_irq(pdev->irq, sym53c8xx_intr, SA_SHIRQ, NAME53C8XX, np)) {
1625 printf_err("%s: request irq %d failure\n",
1626 sym_name(np), pdev->irq);
1627 goto attach_failed;
1628 }
1629 np->s.irq = pdev->irq;
1630
1631 /*
1632 * After SCSI devices have been opened, we cannot
1633 * reset the bus safely, so we do it here.
1634 */
1635 spin_lock_irqsave(instance->host_lock, flags);
1636 if (sym_reset_scsi_bus(np, 0))
1637 goto reset_failed;
1638
1639 /*
1640 * Start the SCRIPTS.
1641 */
1642 sym_start_up (np, 1);
1643
1644 /*
1645 * Start the timer daemon
1646 */
1647 init_timer(&np->s.timer);
1648 np->s.timer.data = (unsigned long) np;
1649 np->s.timer.function = sym53c8xx_timer;
1650 np->s.lasttime=0;
1651 sym_timer (np);
1652
1653 /*
1654 * Fill Linux host instance structure
1655 * and return success.
1656 */
1657 instance->max_channel = 0;
1658 instance->this_id = np->myaddr;
1659 instance->max_id = np->maxwide ? 16 : 8;
1660 instance->max_lun = SYM_CONF_MAX_LUN;
1661 instance->unique_id = pci_resource_start(pdev, 0);
1662 instance->cmd_per_lun = SYM_CONF_MAX_TAG;
1663 instance->can_queue = (SYM_CONF_MAX_START-2);
1664 instance->sg_tablesize = SYM_CONF_MAX_SG;
1665 instance->max_cmd_len = 16;
1666 BUG_ON(sym2_transport_template == NULL);
1667 instance->transportt = sym2_transport_template;
1668
1669 spin_unlock_irqrestore(instance->host_lock, flags);
1670
1671 return instance;
1672
1673 reset_failed:
1674 printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1675 "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1676 spin_unlock_irqrestore(instance->host_lock, flags);
1677 attach_failed:
1678 if (!instance)
1679 return NULL;
1680 printf_info("%s: giving up ...\n", sym_name(np));
1681 if (np)
1682 sym_free_resources(np, pdev);
1683 scsi_host_put(instance);
1684
1685 return NULL;
1686 }
1687
1688
1689 /*
1690 * Detect and try to read SYMBIOS and TEKRAM NVRAM.
1691 */
1692 #if SYM_CONF_NVRAM_SUPPORT
1693 static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1694 {
1695 devp->nvram = nvp;
1696 devp->device_id = devp->chip.device_id;
1697 nvp->type = 0;
1698
1699 sym_read_nvram(devp, nvp);
1700 }
1701 #else
1702 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1703 {
1704 }
1705 #endif /* SYM_CONF_NVRAM_SUPPORT */
1706
1707 static int __devinit sym_check_supported(struct sym_device *device)
1708 {
1709 struct sym_chip *chip;
1710 struct pci_dev *pdev = device->pdev;
1711 u_char revision;
1712 unsigned long io_port = pci_resource_start(pdev, 0);
1713 int i;
1714
1715 /*
1716 * If user excluded this chip, do not initialize it.
1717 * I hate this code so much. Must kill it.
1718 */
1719 if (io_port) {
1720 for (i = 0 ; i < 8 ; i++) {
1721 if (sym_driver_setup.excludes[i] == io_port)
1722 return -ENODEV;
1723 }
1724 }
1725
1726 /*
1727 * Check if the chip is supported. Then copy the chip description
1728 * to our device structure so we can make it match the actual device
1729 * and options.
1730 */
1731 pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
1732 chip = sym_lookup_chip_table(pdev->device, revision);
1733 if (!chip) {
1734 dev_info(&pdev->dev, "device not supported\n");
1735 return -ENODEV;
1736 }
1737 memcpy(&device->chip, chip, sizeof(device->chip));
1738 device->chip.revision_id = revision;
1739
1740 return 0;
1741 }
1742
1743 /*
1744 * Ignore Symbios chips controlled by various RAID controllers.
1745 * These controllers set value 0x52414944 at RAM end - 16.
1746 */
1747 static int __devinit sym_check_raid(struct sym_device *device)
1748 {
1749 unsigned int ram_size, ram_val;
1750
1751 if (!device->s.ramaddr)
1752 return 0;
1753
1754 if (device->chip.features & FE_RAM8K)
1755 ram_size = 8192;
1756 else
1757 ram_size = 4096;
1758
1759 ram_val = readl(device->s.ramaddr + ram_size - 16);
1760 if (ram_val != 0x52414944)
1761 return 0;
1762
1763 dev_info(&device->pdev->dev,
1764 "not initializing, driven by RAID controller.\n");
1765 return -ENODEV;
1766 }
1767
1768 static int __devinit sym_set_workarounds(struct sym_device *device)
1769 {
1770 struct sym_chip *chip = &device->chip;
1771 struct pci_dev *pdev = device->pdev;
1772 u_short status_reg;
1773
1774 /*
1775 * (ITEM 12 of a DEL about the 896 I haven't yet).
1776 * We must ensure the chip will use WRITE AND INVALIDATE.
1777 * The revision number limit is for now arbitrary.
1778 */
1779 if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && chip->revision_id < 0x4) {
1780 chip->features |= (FE_WRIE | FE_CLSE);
1781 }
1782
1783 /* If the chip can do Memory Write Invalidate, enable it */
1784 if (chip->features & FE_WRIE) {
1785 if (pci_set_mwi(pdev))
1786 return -ENODEV;
1787 }
1788
1789 /*
1790 * Work around for errant bit in 895A. The 66Mhz
1791 * capable bit is set erroneously. Clear this bit.
1792 * (Item 1 DEL 533)
1793 *
1794 * Make sure Config space and Features agree.
1795 *
1796 * Recall: writes are not normal to status register -
1797 * write a 1 to clear and a 0 to leave unchanged.
1798 * Can only reset bits.
1799 */
1800 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1801 if (chip->features & FE_66MHZ) {
1802 if (!(status_reg & PCI_STATUS_66MHZ))
1803 chip->features &= ~FE_66MHZ;
1804 } else {
1805 if (status_reg & PCI_STATUS_66MHZ) {
1806 status_reg = PCI_STATUS_66MHZ;
1807 pci_write_config_word(pdev, PCI_STATUS, status_reg);
1808 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1809 }
1810 }
1811
1812 return 0;
1813 }
1814
1815 /*
1816 * Read and check the PCI configuration for any detected NCR
1817 * boards and save data for attaching after all boards have
1818 * been detected.
1819 */
1820 static void __devinit
1821 sym_init_device(struct pci_dev *pdev, struct sym_device *device)
1822 {
1823 int i;
1824
1825 device->host_id = SYM_SETUP_HOST_ID;
1826 device->pdev = pdev;
1827
1828 i = pci_get_base_address(pdev, 1, &device->mmio_base);
1829 pci_get_base_address(pdev, i, &device->ram_base);
1830
1831 #ifndef CONFIG_SCSI_SYM53C8XX_IOMAPPED
1832 if (device->mmio_base)
1833 device->s.ioaddr = pci_iomap(pdev, 1,
1834 pci_resource_len(pdev, 1));
1835 #endif
1836 if (!device->s.ioaddr)
1837 device->s.ioaddr = pci_iomap(pdev, 0,
1838 pci_resource_len(pdev, 0));
1839 if (device->ram_base)
1840 device->s.ramaddr = pci_iomap(pdev, i,
1841 pci_resource_len(pdev, i));
1842 }
1843
1844 /*
1845 * The NCR PQS and PDS cards are constructed as a DEC bridge
1846 * behind which sits a proprietary NCR memory controller and
1847 * either four or two 53c875s as separate devices. We can tell
1848 * if an 875 is part of a PQS/PDS or not since if it is, it will
1849 * be on the same bus as the memory controller. In its usual
1850 * mode of operation, the 875s are slaved to the memory
1851 * controller for all transfers. To operate with the Linux
1852 * driver, the memory controller is disabled and the 875s
1853 * freed to function independently. The only wrinkle is that
1854 * the preset SCSI ID (which may be zero) must be read in from
1855 * a special configuration space register of the 875.
1856 */
1857 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1858 {
1859 int slot;
1860 u8 tmp;
1861
1862 for (slot = 0; slot < 256; slot++) {
1863 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1864
1865 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1866 pci_dev_put(memc);
1867 continue;
1868 }
1869
1870 /* bit 1: allow individual 875 configuration */
1871 pci_read_config_byte(memc, 0x44, &tmp);
1872 if ((tmp & 0x2) == 0) {
1873 tmp |= 0x2;
1874 pci_write_config_byte(memc, 0x44, tmp);
1875 }
1876
1877 /* bit 2: drive individual 875 interrupts to the bus */
1878 pci_read_config_byte(memc, 0x45, &tmp);
1879 if ((tmp & 0x4) == 0) {
1880 tmp |= 0x4;
1881 pci_write_config_byte(memc, 0x45, tmp);
1882 }
1883
1884 pci_dev_put(memc);
1885 break;
1886 }
1887
1888 pci_read_config_byte(pdev, 0x84, &tmp);
1889 sym_dev->host_id = tmp;
1890 }
1891
1892 /*
1893 * Called before unloading the module.
1894 * Detach the host.
1895 * We have to free resources and halt the NCR chip.
1896 */
1897 static int sym_detach(struct sym_hcb *np, struct pci_dev *pdev)
1898 {
1899 printk("%s: detaching ...\n", sym_name(np));
1900
1901 del_timer_sync(&np->s.timer);
1902
1903 /*
1904 * Reset NCR chip.
1905 * We should use sym_soft_reset(), but we don't want to do
1906 * so, since we may not be safe if interrupts occur.
1907 */
1908 printk("%s: resetting chip\n", sym_name(np));
1909 OUTB(np, nc_istat, SRST);
1910 INB(np, nc_mbox1);
1911 udelay(10);
1912 OUTB(np, nc_istat, 0);
1913
1914 sym_free_resources(np, pdev);
1915
1916 return 1;
1917 }
1918
1919 /*
1920 * Driver host template.
1921 */
1922 static struct scsi_host_template sym2_template = {
1923 .module = THIS_MODULE,
1924 .name = "sym53c8xx",
1925 .info = sym53c8xx_info,
1926 .queuecommand = sym53c8xx_queue_command,
1927 .slave_alloc = sym53c8xx_slave_alloc,
1928 .slave_configure = sym53c8xx_slave_configure,
1929 .eh_abort_handler = sym53c8xx_eh_abort_handler,
1930 .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1931 .eh_bus_reset_handler = sym53c8xx_eh_bus_reset_handler,
1932 .eh_host_reset_handler = sym53c8xx_eh_host_reset_handler,
1933 .this_id = 7,
1934 .use_clustering = DISABLE_CLUSTERING,
1935 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1936 .proc_info = sym53c8xx_proc_info,
1937 .proc_name = NAME53C8XX,
1938 #endif
1939 };
1940
1941 static int attach_count;
1942
1943 static int __devinit sym2_probe(struct pci_dev *pdev,
1944 const struct pci_device_id *ent)
1945 {
1946 struct sym_device sym_dev;
1947 struct sym_nvram nvram;
1948 struct Scsi_Host *instance;
1949
1950 memset(&sym_dev, 0, sizeof(sym_dev));
1951 memset(&nvram, 0, sizeof(nvram));
1952
1953 if (pci_enable_device(pdev))
1954 goto leave;
1955
1956 pci_set_master(pdev);
1957
1958 if (pci_request_regions(pdev, NAME53C8XX))
1959 goto disable;
1960
1961 sym_init_device(pdev, &sym_dev);
1962 if (sym_check_supported(&sym_dev))
1963 goto free;
1964
1965 if (sym_check_raid(&sym_dev))
1966 goto leave; /* Don't disable the device */
1967
1968 if (sym_set_workarounds(&sym_dev))
1969 goto free;
1970
1971 sym_config_pqs(pdev, &sym_dev);
1972
1973 sym_get_nvram(&sym_dev, &nvram);
1974
1975 instance = sym_attach(&sym2_template, attach_count, &sym_dev);
1976 if (!instance)
1977 goto free;
1978
1979 if (scsi_add_host(instance, &pdev->dev))
1980 goto detach;
1981 scsi_scan_host(instance);
1982
1983 attach_count++;
1984
1985 return 0;
1986
1987 detach:
1988 sym_detach(pci_get_drvdata(pdev), pdev);
1989 free:
1990 pci_release_regions(pdev);
1991 disable:
1992 pci_disable_device(pdev);
1993 leave:
1994 return -ENODEV;
1995 }
1996
1997 static void __devexit sym2_remove(struct pci_dev *pdev)
1998 {
1999 struct sym_hcb *np = pci_get_drvdata(pdev);
2000 struct Scsi_Host *host = np->s.host;
2001
2002 scsi_remove_host(host);
2003 scsi_host_put(host);
2004
2005 sym_detach(np, pdev);
2006
2007 pci_release_regions(pdev);
2008 pci_disable_device(pdev);
2009
2010 attach_count--;
2011 }
2012
2013 static void sym2_get_signalling(struct Scsi_Host *shost)
2014 {
2015 struct sym_hcb *np = sym_get_hcb(shost);
2016 enum spi_signal_type type;
2017
2018 switch (np->scsi_mode) {
2019 case SMODE_SE:
2020 type = SPI_SIGNAL_SE;
2021 break;
2022 case SMODE_LVD:
2023 type = SPI_SIGNAL_LVD;
2024 break;
2025 case SMODE_HVD:
2026 type = SPI_SIGNAL_HVD;
2027 break;
2028 default:
2029 type = SPI_SIGNAL_UNKNOWN;
2030 break;
2031 }
2032 spi_signalling(shost) = type;
2033 }
2034
2035 static void sym2_set_offset(struct scsi_target *starget, int offset)
2036 {
2037 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2038 struct sym_hcb *np = sym_get_hcb(shost);
2039 struct sym_tcb *tp = &np->target[starget->id];
2040
2041 tp->tgoal.offset = offset;
2042 tp->tgoal.check_nego = 1;
2043 }
2044
2045 static void sym2_set_period(struct scsi_target *starget, int period)
2046 {
2047 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2048 struct sym_hcb *np = sym_get_hcb(shost);
2049 struct sym_tcb *tp = &np->target[starget->id];
2050
2051 /* have to have DT for these transfers, but DT will also
2052 * set width, so check that this is allowed */
2053 if (period <= np->minsync && spi_width(starget))
2054 tp->tgoal.dt = 1;
2055
2056 tp->tgoal.period = period;
2057 tp->tgoal.check_nego = 1;
2058 }
2059
2060 static void sym2_set_width(struct scsi_target *starget, int width)
2061 {
2062 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2063 struct sym_hcb *np = sym_get_hcb(shost);
2064 struct sym_tcb *tp = &np->target[starget->id];
2065
2066 /* It is illegal to have DT set on narrow transfers. If DT is
2067 * clear, we must also clear IU and QAS. */
2068 if (width == 0)
2069 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2070
2071 tp->tgoal.width = width;
2072 tp->tgoal.check_nego = 1;
2073 }
2074
2075 static void sym2_set_dt(struct scsi_target *starget, int dt)
2076 {
2077 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2078 struct sym_hcb *np = sym_get_hcb(shost);
2079 struct sym_tcb *tp = &np->target[starget->id];
2080
2081 /* We must clear QAS and IU if DT is clear */
2082 if (dt)
2083 tp->tgoal.dt = 1;
2084 else
2085 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2086 tp->tgoal.check_nego = 1;
2087 }
2088
2089 static void sym2_set_iu(struct scsi_target *starget, int iu)
2090 {
2091 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2092 struct sym_hcb *np = sym_get_hcb(shost);
2093 struct sym_tcb *tp = &np->target[starget->id];
2094
2095 if (iu)
2096 tp->tgoal.iu = tp->tgoal.dt = 1;
2097 else
2098 tp->tgoal.iu = 0;
2099 tp->tgoal.check_nego = 1;
2100 }
2101
2102 static void sym2_set_qas(struct scsi_target *starget, int qas)
2103 {
2104 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2105 struct sym_hcb *np = sym_get_hcb(shost);
2106 struct sym_tcb *tp = &np->target[starget->id];
2107
2108 if (qas)
2109 tp->tgoal.dt = tp->tgoal.qas = 1;
2110 else
2111 tp->tgoal.qas = 0;
2112 tp->tgoal.check_nego = 1;
2113 }
2114
2115
2116 static struct spi_function_template sym2_transport_functions = {
2117 .set_offset = sym2_set_offset,
2118 .show_offset = 1,
2119 .set_period = sym2_set_period,
2120 .show_period = 1,
2121 .set_width = sym2_set_width,
2122 .show_width = 1,
2123 .set_dt = sym2_set_dt,
2124 .show_dt = 1,
2125 .set_iu = sym2_set_iu,
2126 .show_iu = 1,
2127 .set_qas = sym2_set_qas,
2128 .show_qas = 1,
2129 .get_signalling = sym2_get_signalling,
2130 };
2131
2132 static struct pci_device_id sym2_id_table[] __devinitdata = {
2133 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2134 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2135 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2136 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2137 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2138 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2139 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2140 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2141 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2142 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2143 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2144 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2145 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2146 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2147 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2148 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2149 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2150 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2151 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2152 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2153 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2154 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2155 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2156 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2157 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2158 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2159 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2160 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2161 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2162 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2163 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2164 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2165 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2166 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2167 { 0, }
2168 };
2169
2170 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2171
2172 static struct pci_driver sym2_driver = {
2173 .name = NAME53C8XX,
2174 .id_table = sym2_id_table,
2175 .probe = sym2_probe,
2176 .remove = __devexit_p(sym2_remove),
2177 };
2178
2179 static int __init sym2_init(void)
2180 {
2181 int error;
2182
2183 sym2_setup_params();
2184 sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2185 if (!sym2_transport_template)
2186 return -ENODEV;
2187
2188 error = pci_register_driver(&sym2_driver);
2189 if (error)
2190 spi_release_transport(sym2_transport_template);
2191 return error;
2192 }
2193
2194 static void __exit sym2_exit(void)
2195 {
2196 pci_unregister_driver(&sym2_driver);
2197 spi_release_transport(sym2_transport_template);
2198 }
2199
2200 module_init(sym2_init);
2201 module_exit(sym2_exit);
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