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[SCSI] sym2: Manage sym_lcb properly
[linux-2.6/linux-loongson.git] / drivers / scsi / sym53c8xx_2 / sym_glue.c
bloba2bfdf8417a2b06f3e8b2ba4941716a5ccb8d63f
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 sym_start_next_ccbs(np, lp, 2);
567 return 0;
568
569 out_abort:
570 sym_free_ccb(np, cp);
571 sym_xpt_done(np, cmd);
572 return 0;
573 }
574
575
576 /*
577 * timer daemon.
578 *
579 * Misused to keep the driver running when
580 * interrupts are not configured correctly.
581 */
582 static void sym_timer(struct sym_hcb *np)
583 {
584 unsigned long thistime = jiffies;
585
586 /*
587 * Restart the timer.
588 */
589 np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL;
590 add_timer(&np->s.timer);
591
592 /*
593 * If we are resetting the ncr, wait for settle_time before
594 * clearing it. Then command processing will be resumed.
595 */
596 if (np->s.settle_time_valid) {
597 if (time_before_eq(np->s.settle_time, thistime)) {
598 if (sym_verbose >= 2 )
599 printk("%s: command processing resumed\n",
600 sym_name(np));
601 np->s.settle_time_valid = 0;
602 }
603 return;
604 }
605
606 /*
607 * Nothing to do for now, but that may come.
608 */
609 if (np->s.lasttime + 4*HZ < thistime) {
610 np->s.lasttime = thistime;
611 }
612
613 #ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
614 /*
615 * Some way-broken PCI bridges may lead to
616 * completions being lost when the clearing
617 * of the INTFLY flag by the CPU occurs
618 * concurrently with the chip raising this flag.
619 * If this ever happen, lost completions will
620 * be reaped here.
621 */
622 sym_wakeup_done(np);
623 #endif
624 }
625
626
627 /*
628 * PCI BUS error handler.
629 */
630 void sym_log_bus_error(struct sym_hcb *np)
631 {
632 u_short pci_sts;
633 pci_read_config_word(np->s.device, PCI_STATUS, &pci_sts);
634 if (pci_sts & 0xf900) {
635 pci_write_config_word(np->s.device, PCI_STATUS, pci_sts);
636 printf("%s: PCI STATUS = 0x%04x\n",
637 sym_name(np), pci_sts & 0xf900);
638 }
639 }
640
641 /*
642 * queuecommand method. Entered with the host adapter lock held and
643 * interrupts disabled.
644 */
645 static int sym53c8xx_queue_command(struct scsi_cmnd *cmd,
646 void (*done)(struct scsi_cmnd *))
647 {
648 struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
649 struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd);
650 int sts = 0;
651
652 cmd->scsi_done = done;
653 memset(ucp, 0, sizeof(*ucp));
654
655 /*
656 * Shorten our settle_time if needed for
657 * this command not to time out.
658 */
659 if (np->s.settle_time_valid && cmd->timeout_per_command) {
660 unsigned long tlimit = jiffies + cmd->timeout_per_command;
661 tlimit -= SYM_CONF_TIMER_INTERVAL*2;
662 if (time_after(np->s.settle_time, tlimit)) {
663 np->s.settle_time = tlimit;
664 }
665 }
666
667 if (np->s.settle_time_valid)
668 return SCSI_MLQUEUE_HOST_BUSY;
669
670 sts = sym_queue_command(np, cmd);
671 if (sts)
672 return SCSI_MLQUEUE_HOST_BUSY;
673 return 0;
674 }
675
676 /*
677 * Linux entry point of the interrupt handler.
678 */
679 static irqreturn_t sym53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs)
680 {
681 unsigned long flags;
682 struct sym_hcb *np = (struct sym_hcb *)dev_id;
683
684 if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
685
686 spin_lock_irqsave(np->s.host->host_lock, flags);
687 sym_interrupt(np);
688 spin_unlock_irqrestore(np->s.host->host_lock, flags);
689
690 if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
691
692 return IRQ_HANDLED;
693 }
694
695 /*
696 * Linux entry point of the timer handler
697 */
698 static void sym53c8xx_timer(unsigned long npref)
699 {
700 struct sym_hcb *np = (struct sym_hcb *)npref;
701 unsigned long flags;
702
703 spin_lock_irqsave(np->s.host->host_lock, flags);
704 sym_timer(np);
705 spin_unlock_irqrestore(np->s.host->host_lock, flags);
706 }
707
708
709 /*
710 * What the eh thread wants us to perform.
711 */
712 #define SYM_EH_ABORT 0
713 #define SYM_EH_DEVICE_RESET 1
714 #define SYM_EH_BUS_RESET 2
715 #define SYM_EH_HOST_RESET 3
716
717 /*
718 * What we will do regarding the involved SCSI command.
719 */
720 #define SYM_EH_DO_IGNORE 0
721 #define SYM_EH_DO_COMPLETE 1
722 #define SYM_EH_DO_WAIT 2
723
724 /*
725 * Our general completion handler.
726 */
727 static void __sym_eh_done(struct scsi_cmnd *cmd, int timed_out)
728 {
729 struct sym_eh_wait *ep = SYM_UCMD_PTR(cmd)->eh_wait;
730 if (!ep)
731 return;
732
733 /* Try to avoid a race here (not 100% safe) */
734 if (!timed_out) {
735 ep->timed_out = 0;
736 if (ep->to_do == SYM_EH_DO_WAIT && !del_timer(&ep->timer))
737 return;
738 }
739
740 /* Revert everything */
741 SYM_UCMD_PTR(cmd)->eh_wait = NULL;
742 cmd->scsi_done = ep->old_done;
743
744 /* Wake up the eh thread if it wants to sleep */
745 if (ep->to_do == SYM_EH_DO_WAIT)
746 complete(&ep->done);
747 }
748
749 /*
750 * scsi_done() alias when error recovery is in progress.
751 */
752 static void sym_eh_done(struct scsi_cmnd *cmd) { __sym_eh_done(cmd, 0); }
753
754 /*
755 * Some timeout handler to avoid waiting too long.
756 */
757 static void sym_eh_timeout(u_long p) { __sym_eh_done((struct scsi_cmnd *)p, 1); }
758
759 /*
760 * Generic method for our eh processing.
761 * The 'op' argument tells what we have to do.
762 */
763 static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd)
764 {
765 struct sym_hcb *np = SYM_SOFTC_PTR(cmd);
766 SYM_QUEHEAD *qp;
767 int to_do = SYM_EH_DO_IGNORE;
768 int sts = -1;
769 struct sym_eh_wait eh, *ep = &eh;
770
771 dev_warn(&cmd->device->sdev_gendev, "%s operation started.\n", opname);
772
773 /* This one is queued in some place -> to wait for completion */
774 FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
775 struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
776 if (cp->cmd == cmd) {
777 to_do = SYM_EH_DO_WAIT;
778 goto prepare;
779 }
780 }
781
782 prepare:
783 /* Prepare stuff to either ignore, complete or wait for completion */
784 switch(to_do) {
785 default:
786 case SYM_EH_DO_IGNORE:
787 break;
788 case SYM_EH_DO_WAIT:
789 init_completion(&ep->done);
790 /* fall through */
791 case SYM_EH_DO_COMPLETE:
792 ep->old_done = cmd->scsi_done;
793 cmd->scsi_done = sym_eh_done;
794 SYM_UCMD_PTR(cmd)->eh_wait = ep;
795 }
796
797 /* Try to proceed the operation we have been asked for */
798 sts = -1;
799 switch(op) {
800 case SYM_EH_ABORT:
801 sts = sym_abort_scsiio(np, cmd, 1);
802 break;
803 case SYM_EH_DEVICE_RESET:
804 sts = sym_reset_scsi_target(np, cmd->device->id);
805 break;
806 case SYM_EH_BUS_RESET:
807 sym_reset_scsi_bus(np, 1);
808 sts = 0;
809 break;
810 case SYM_EH_HOST_RESET:
811 sym_reset_scsi_bus(np, 0);
812 sym_start_up (np, 1);
813 sts = 0;
814 break;
815 default:
816 break;
817 }
818
819 /* On error, restore everything and cross fingers :) */
820 if (sts) {
821 SYM_UCMD_PTR(cmd)->eh_wait = NULL;
822 cmd->scsi_done = ep->old_done;
823 to_do = SYM_EH_DO_IGNORE;
824 }
825
826 ep->to_do = to_do;
827 /* Complete the command with locks held as required by the driver */
828 if (to_do == SYM_EH_DO_COMPLETE)
829 sym_xpt_done2(np, cmd, DID_ABORT);
830
831 /* Wait for completion with locks released, as required by kernel */
832 if (to_do == SYM_EH_DO_WAIT) {
833 init_timer(&ep->timer);
834 ep->timer.expires = jiffies + (5*HZ);
835 ep->timer.function = sym_eh_timeout;
836 ep->timer.data = (u_long)cmd;
837 ep->timed_out = 1; /* Be pessimistic for once :) */
838 add_timer(&ep->timer);
839 spin_unlock_irq(np->s.host->host_lock);
840 wait_for_completion(&ep->done);
841 spin_lock_irq(np->s.host->host_lock);
842 if (ep->timed_out)
843 sts = -2;
844 }
845 dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname,
846 sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed");
847 return sts ? SCSI_FAILED : SCSI_SUCCESS;
848 }
849
850
851 /*
852 * Error handlers called from the eh thread (one thread per HBA).
853 */
854 static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd)
855 {
856 int rc;
857
858 spin_lock_irq(cmd->device->host->host_lock);
859 rc = sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
860 spin_unlock_irq(cmd->device->host->host_lock);
861
862 return rc;
863 }
864
865 static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
866 {
867 int rc;
868
869 spin_lock_irq(cmd->device->host->host_lock);
870 rc = sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
871 spin_unlock_irq(cmd->device->host->host_lock);
872
873 return rc;
874 }
875
876 static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
877 {
878 int rc;
879
880 spin_lock_irq(cmd->device->host->host_lock);
881 rc = sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
882 spin_unlock_irq(cmd->device->host->host_lock);
883
884 return rc;
885 }
886
887 static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd)
888 {
889 int rc;
890
891 spin_lock_irq(cmd->device->host->host_lock);
892 rc = sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
893 spin_unlock_irq(cmd->device->host->host_lock);
894
895 return rc;
896 }
897
898 /*
899 * Tune device queuing depth, according to various limits.
900 */
901 static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags)
902 {
903 struct sym_lcb *lp = sym_lp(tp, lun);
904 u_short oldtags;
905
906 if (!lp)
907 return;
908
909 oldtags = lp->s.reqtags;
910
911 if (reqtags > lp->s.scdev_depth)
912 reqtags = lp->s.scdev_depth;
913
914 lp->started_limit = reqtags ? reqtags : 2;
915 lp->started_max = 1;
916 lp->s.reqtags = reqtags;
917
918 if (reqtags != oldtags) {
919 dev_info(&tp->starget->dev,
920 "tagged command queuing %s, command queue depth %d.\n",
921 lp->s.reqtags ? "enabled" : "disabled",
922 lp->started_limit);
923 }
924 }
925
926 /*
927 * Linux select queue depths function
928 */
929 #define DEF_DEPTH (sym_driver_setup.max_tag)
930 #define ALL_TARGETS -2
931 #define NO_TARGET -1
932 #define ALL_LUNS -2
933 #define NO_LUN -1
934
935 static int device_queue_depth(struct sym_hcb *np, int target, int lun)
936 {
937 int c, h, t, u, v;
938 char *p = sym_driver_setup.tag_ctrl;
939 char *ep;
940
941 h = -1;
942 t = NO_TARGET;
943 u = NO_LUN;
944 while ((c = *p++) != 0) {
945 v = simple_strtoul(p, &ep, 0);
946 switch(c) {
947 case '/':
948 ++h;
949 t = ALL_TARGETS;
950 u = ALL_LUNS;
951 break;
952 case 't':
953 if (t != target)
954 t = (target == v) ? v : NO_TARGET;
955 u = ALL_LUNS;
956 break;
957 case 'u':
958 if (u != lun)
959 u = (lun == v) ? v : NO_LUN;
960 break;
961 case 'q':
962 if (h == np->s.unit &&
963 (t == ALL_TARGETS || t == target) &&
964 (u == ALL_LUNS || u == lun))
965 return v;
966 break;
967 case '-':
968 t = ALL_TARGETS;
969 u = ALL_LUNS;
970 break;
971 default:
972 break;
973 }
974 p = ep;
975 }
976 return DEF_DEPTH;
977 }
978
979 static int sym53c8xx_slave_alloc(struct scsi_device *sdev)
980 {
981 struct sym_hcb *np = sym_get_hcb(sdev->host);
982 struct sym_tcb *tp = &np->target[sdev->id];
983 struct sym_lcb *lp;
984
985 if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN)
986 return -ENXIO;
987
988 /*
989 * Fail the device init if the device is flagged NOSCAN at BOOT in
990 * the NVRAM. This may speed up boot and maintain coherency with
991 * BIOS device numbering. Clearing the flag allows the user to
992 * rescan skipped devices later. We also return an error for
993 * devices not flagged for SCAN LUNS in the NVRAM since some single
994 * lun devices behave badly when asked for a non zero LUN.
995 */
996
997 if ((tp->usrflags & SYM_SCAN_BOOT_DISABLED) ||
998 ((tp->usrflags & SYM_SCAN_LUNS_DISABLED) && sdev->lun != 0)) {
999 tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
1000 return -ENXIO;
1001 }
1002
1003 lp = sym_alloc_lcb(np, sdev->id, sdev->lun);
1004 if (!lp)
1005 return -ENOMEM;
1006
1007 tp->starget = sdev->sdev_target;
1008 return 0;
1009 }
1010
1011 /*
1012 * Linux entry point for device queue sizing.
1013 */
1014 static int sym53c8xx_slave_configure(struct scsi_device *sdev)
1015 {
1016 struct sym_hcb *np = sym_get_hcb(sdev->host);
1017 struct sym_tcb *tp = &np->target[sdev->id];
1018 struct sym_lcb *lp = sym_lp(tp, sdev->lun);
1019 int reqtags, depth_to_use;
1020
1021 /*
1022 * Get user flags.
1023 */
1024 lp->curr_flags = lp->user_flags;
1025
1026 /*
1027 * Select queue depth from driver setup.
1028 * Donnot use more than configured by user.
1029 * Use at least 2.
1030 * Donnot use more than our maximum.
1031 */
1032 reqtags = device_queue_depth(np, sdev->id, sdev->lun);
1033 if (reqtags > tp->usrtags)
1034 reqtags = tp->usrtags;
1035 if (!sdev->tagged_supported)
1036 reqtags = 0;
1037 #if 1 /* Avoid to locally queue commands for no good reasons */
1038 if (reqtags > SYM_CONF_MAX_TAG)
1039 reqtags = SYM_CONF_MAX_TAG;
1040 depth_to_use = (reqtags ? reqtags : 2);
1041 #else
1042 depth_to_use = (reqtags ? SYM_CONF_MAX_TAG : 2);
1043 #endif
1044 scsi_adjust_queue_depth(sdev,
1045 (sdev->tagged_supported ?
1046 MSG_SIMPLE_TAG : 0),
1047 depth_to_use);
1048 lp->s.scdev_depth = depth_to_use;
1049 sym_tune_dev_queuing(tp, sdev->lun, reqtags);
1050
1051 if (!spi_initial_dv(sdev->sdev_target))
1052 spi_dv_device(sdev);
1053
1054 return 0;
1055 }
1056
1057 static void sym53c8xx_slave_destroy(struct scsi_device *sdev)
1058 {
1059 struct sym_hcb *np = sym_get_hcb(sdev->host);
1060 struct sym_lcb *lp = sym_lp(&np->target[sdev->id], sdev->lun);
1061
1062 if (lp->itlq_tbl)
1063 sym_mfree_dma(lp->itlq_tbl, SYM_CONF_MAX_TASK * 4, "ITLQ_TBL");
1064 kfree(lp->cb_tags);
1065 sym_mfree_dma(lp, sizeof(*lp), "LCB");
1066 }
1067
1068 /*
1069 * Linux entry point for info() function
1070 */
1071 static const char *sym53c8xx_info (struct Scsi_Host *host)
1072 {
1073 return SYM_DRIVER_NAME;
1074 }
1075
1076
1077 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1078 /*
1079 * Proc file system stuff
1080 *
1081 * A read operation returns adapter information.
1082 * A write operation is a control command.
1083 * The string is parsed in the driver code and the command is passed
1084 * to the sym_usercmd() function.
1085 */
1086
1087 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1088
1089 struct sym_usrcmd {
1090 u_long target;
1091 u_long lun;
1092 u_long data;
1093 u_long cmd;
1094 };
1095
1096 #define UC_SETSYNC 10
1097 #define UC_SETTAGS 11
1098 #define UC_SETDEBUG 12
1099 #define UC_SETWIDE 14
1100 #define UC_SETFLAG 15
1101 #define UC_SETVERBOSE 17
1102 #define UC_RESETDEV 18
1103 #define UC_CLEARDEV 19
1104
1105 static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc)
1106 {
1107 struct sym_tcb *tp;
1108 int t, l;
1109
1110 switch (uc->cmd) {
1111 case 0: return;
1112
1113 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1114 case UC_SETDEBUG:
1115 sym_debug_flags = uc->data;
1116 break;
1117 #endif
1118 case UC_SETVERBOSE:
1119 np->verbose = uc->data;
1120 break;
1121 default:
1122 /*
1123 * We assume that other commands apply to targets.
1124 * This should always be the case and avoid the below
1125 * 4 lines to be repeated 6 times.
1126 */
1127 for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
1128 if (!((uc->target >> t) & 1))
1129 continue;
1130 tp = &np->target[t];
1131
1132 switch (uc->cmd) {
1133
1134 case UC_SETSYNC:
1135 if (!uc->data || uc->data >= 255) {
1136 tp->tgoal.iu = tp->tgoal.dt =
1137 tp->tgoal.qas = 0;
1138 tp->tgoal.offset = 0;
1139 } else if (uc->data <= 9 && np->minsync_dt) {
1140 if (uc->data < np->minsync_dt)
1141 uc->data = np->minsync_dt;
1142 tp->tgoal.iu = tp->tgoal.dt =
1143 tp->tgoal.qas = 1;
1144 tp->tgoal.width = 1;
1145 tp->tgoal.period = uc->data;
1146 tp->tgoal.offset = np->maxoffs_dt;
1147 } else {
1148 if (uc->data < np->minsync)
1149 uc->data = np->minsync;
1150 tp->tgoal.iu = tp->tgoal.dt =
1151 tp->tgoal.qas = 0;
1152 tp->tgoal.period = uc->data;
1153 tp->tgoal.offset = np->maxoffs;
1154 }
1155 tp->tgoal.check_nego = 1;
1156 break;
1157 case UC_SETWIDE:
1158 tp->tgoal.width = uc->data ? 1 : 0;
1159 tp->tgoal.check_nego = 1;
1160 break;
1161 case UC_SETTAGS:
1162 for (l = 0; l < SYM_CONF_MAX_LUN; l++)
1163 sym_tune_dev_queuing(tp, l, uc->data);
1164 break;
1165 case UC_RESETDEV:
1166 tp->to_reset = 1;
1167 np->istat_sem = SEM;
1168 OUTB(np, nc_istat, SIGP|SEM);
1169 break;
1170 case UC_CLEARDEV:
1171 for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
1172 struct sym_lcb *lp = sym_lp(tp, l);
1173 if (lp) lp->to_clear = 1;
1174 }
1175 np->istat_sem = SEM;
1176 OUTB(np, nc_istat, SIGP|SEM);
1177 break;
1178 case UC_SETFLAG:
1179 tp->usrflags = uc->data;
1180 break;
1181 }
1182 }
1183 break;
1184 }
1185 }
1186
1187 static int skip_spaces(char *ptr, int len)
1188 {
1189 int cnt, c;
1190
1191 for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--);
1192
1193 return (len - cnt);
1194 }
1195
1196 static int get_int_arg(char *ptr, int len, u_long *pv)
1197 {
1198 char *end;
1199
1200 *pv = simple_strtoul(ptr, &end, 10);
1201 return (end - ptr);
1202 }
1203
1204 static int is_keyword(char *ptr, int len, char *verb)
1205 {
1206 int verb_len = strlen(verb);
1207
1208 if (len >= verb_len && !memcmp(verb, ptr, verb_len))
1209 return verb_len;
1210 else
1211 return 0;
1212 }
1213
1214 #define SKIP_SPACES(ptr, len) \
1215 if ((arg_len = skip_spaces(ptr, len)) < 1) \
1216 return -EINVAL; \
1217 ptr += arg_len; len -= arg_len;
1218
1219 #define GET_INT_ARG(ptr, len, v) \
1220 if (!(arg_len = get_int_arg(ptr, len, &(v)))) \
1221 return -EINVAL; \
1222 ptr += arg_len; len -= arg_len;
1223
1224
1225 /*
1226 * Parse a control command
1227 */
1228
1229 static int sym_user_command(struct sym_hcb *np, char *buffer, int length)
1230 {
1231 char *ptr = buffer;
1232 int len = length;
1233 struct sym_usrcmd cmd, *uc = &cmd;
1234 int arg_len;
1235 u_long target;
1236
1237 memset(uc, 0, sizeof(*uc));
1238
1239 if (len > 0 && ptr[len-1] == '\n')
1240 --len;
1241
1242 if ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
1243 uc->cmd = UC_SETSYNC;
1244 else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
1245 uc->cmd = UC_SETTAGS;
1246 else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
1247 uc->cmd = UC_SETVERBOSE;
1248 else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
1249 uc->cmd = UC_SETWIDE;
1250 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1251 else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
1252 uc->cmd = UC_SETDEBUG;
1253 #endif
1254 else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
1255 uc->cmd = UC_SETFLAG;
1256 else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
1257 uc->cmd = UC_RESETDEV;
1258 else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
1259 uc->cmd = UC_CLEARDEV;
1260 else
1261 arg_len = 0;
1262
1263 #ifdef DEBUG_PROC_INFO
1264 printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
1265 #endif
1266
1267 if (!arg_len)
1268 return -EINVAL;
1269 ptr += arg_len; len -= arg_len;
1270
1271 switch(uc->cmd) {
1272 case UC_SETSYNC:
1273 case UC_SETTAGS:
1274 case UC_SETWIDE:
1275 case UC_SETFLAG:
1276 case UC_RESETDEV:
1277 case UC_CLEARDEV:
1278 SKIP_SPACES(ptr, len);
1279 if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
1280 ptr += arg_len; len -= arg_len;
1281 uc->target = ~0;
1282 } else {
1283 GET_INT_ARG(ptr, len, target);
1284 uc->target = (1<<target);
1285 #ifdef DEBUG_PROC_INFO
1286 printk("sym_user_command: target=%ld\n", target);
1287 #endif
1288 }
1289 break;
1290 }
1291
1292 switch(uc->cmd) {
1293 case UC_SETVERBOSE:
1294 case UC_SETSYNC:
1295 case UC_SETTAGS:
1296 case UC_SETWIDE:
1297 SKIP_SPACES(ptr, len);
1298 GET_INT_ARG(ptr, len, uc->data);
1299 #ifdef DEBUG_PROC_INFO
1300 printk("sym_user_command: data=%ld\n", uc->data);
1301 #endif
1302 break;
1303 #ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
1304 case UC_SETDEBUG:
1305 while (len > 0) {
1306 SKIP_SPACES(ptr, len);
1307 if ((arg_len = is_keyword(ptr, len, "alloc")))
1308 uc->data |= DEBUG_ALLOC;
1309 else if ((arg_len = is_keyword(ptr, len, "phase")))
1310 uc->data |= DEBUG_PHASE;
1311 else if ((arg_len = is_keyword(ptr, len, "queue")))
1312 uc->data |= DEBUG_QUEUE;
1313 else if ((arg_len = is_keyword(ptr, len, "result")))
1314 uc->data |= DEBUG_RESULT;
1315 else if ((arg_len = is_keyword(ptr, len, "scatter")))
1316 uc->data |= DEBUG_SCATTER;
1317 else if ((arg_len = is_keyword(ptr, len, "script")))
1318 uc->data |= DEBUG_SCRIPT;
1319 else if ((arg_len = is_keyword(ptr, len, "tiny")))
1320 uc->data |= DEBUG_TINY;
1321 else if ((arg_len = is_keyword(ptr, len, "timing")))
1322 uc->data |= DEBUG_TIMING;
1323 else if ((arg_len = is_keyword(ptr, len, "nego")))
1324 uc->data |= DEBUG_NEGO;
1325 else if ((arg_len = is_keyword(ptr, len, "tags")))
1326 uc->data |= DEBUG_TAGS;
1327 else if ((arg_len = is_keyword(ptr, len, "pointer")))
1328 uc->data |= DEBUG_POINTER;
1329 else
1330 return -EINVAL;
1331 ptr += arg_len; len -= arg_len;
1332 }
1333 #ifdef DEBUG_PROC_INFO
1334 printk("sym_user_command: data=%ld\n", uc->data);
1335 #endif
1336 break;
1337 #endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
1338 case UC_SETFLAG:
1339 while (len > 0) {
1340 SKIP_SPACES(ptr, len);
1341 if ((arg_len = is_keyword(ptr, len, "no_disc")))
1342 uc->data &= ~SYM_DISC_ENABLED;
1343 else
1344 return -EINVAL;
1345 ptr += arg_len; len -= arg_len;
1346 }
1347 break;
1348 default:
1349 break;
1350 }
1351
1352 if (len)
1353 return -EINVAL;
1354 else {
1355 unsigned long flags;
1356
1357 spin_lock_irqsave(np->s.host->host_lock, flags);
1358 sym_exec_user_command (np, uc);
1359 spin_unlock_irqrestore(np->s.host->host_lock, flags);
1360 }
1361 return length;
1362 }
1363
1364 #endif /* SYM_LINUX_USER_COMMAND_SUPPORT */
1365
1366
1367 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1368 /*
1369 * Informations through the proc file system.
1370 */
1371 struct info_str {
1372 char *buffer;
1373 int length;
1374 int offset;
1375 int pos;
1376 };
1377
1378 static void copy_mem_info(struct info_str *info, char *data, int len)
1379 {
1380 if (info->pos + len > info->length)
1381 len = info->length - info->pos;
1382
1383 if (info->pos + len < info->offset) {
1384 info->pos += len;
1385 return;
1386 }
1387 if (info->pos < info->offset) {
1388 data += (info->offset - info->pos);
1389 len -= (info->offset - info->pos);
1390 }
1391
1392 if (len > 0) {
1393 memcpy(info->buffer + info->pos, data, len);
1394 info->pos += len;
1395 }
1396 }
1397
1398 static int copy_info(struct info_str *info, char *fmt, ...)
1399 {
1400 va_list args;
1401 char buf[81];
1402 int len;
1403
1404 va_start(args, fmt);
1405 len = vsprintf(buf, fmt, args);
1406 va_end(args);
1407
1408 copy_mem_info(info, buf, len);
1409 return len;
1410 }
1411
1412 /*
1413 * Copy formatted information into the input buffer.
1414 */
1415 static int sym_host_info(struct sym_hcb *np, char *ptr, off_t offset, int len)
1416 {
1417 struct info_str info;
1418
1419 info.buffer = ptr;
1420 info.length = len;
1421 info.offset = offset;
1422 info.pos = 0;
1423
1424 copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
1425 "revision id 0x%x\n",
1426 np->s.chip_name, np->device_id, np->revision_id);
1427 copy_info(&info, "At PCI address %s, IRQ " IRQ_FMT "\n",
1428 pci_name(np->s.device), IRQ_PRM(np->s.irq));
1429 copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
1430 (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
1431 np->maxwide ? "Wide" : "Narrow",
1432 np->minsync_dt ? ", DT capable" : "");
1433
1434 copy_info(&info, "Max. started commands %d, "
1435 "max. commands per LUN %d\n",
1436 SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
1437
1438 return info.pos > info.offset? info.pos - info.offset : 0;
1439 }
1440 #endif /* SYM_LINUX_USER_INFO_SUPPORT */
1441
1442 /*
1443 * Entry point of the scsi proc fs of the driver.
1444 * - func = 0 means read (returns adapter infos)
1445 * - func = 1 means write (not yet merget from sym53c8xx)
1446 */
1447 static int sym53c8xx_proc_info(struct Scsi_Host *host, char *buffer,
1448 char **start, off_t offset, int length, int func)
1449 {
1450 struct sym_hcb *np = sym_get_hcb(host);
1451 int retv;
1452
1453 if (func) {
1454 #ifdef SYM_LINUX_USER_COMMAND_SUPPORT
1455 retv = sym_user_command(np, buffer, length);
1456 #else
1457 retv = -EINVAL;
1458 #endif
1459 } else {
1460 if (start)
1461 *start = buffer;
1462 #ifdef SYM_LINUX_USER_INFO_SUPPORT
1463 retv = sym_host_info(np, buffer, offset, length);
1464 #else
1465 retv = -EINVAL;
1466 #endif
1467 }
1468
1469 return retv;
1470 }
1471 #endif /* SYM_LINUX_PROC_INFO_SUPPORT */
1472
1473 /*
1474 * Free controller resources.
1475 */
1476 static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev)
1477 {
1478 /*
1479 * Free O/S specific resources.
1480 */
1481 if (np->s.irq)
1482 free_irq(np->s.irq, np);
1483 if (np->s.ioaddr)
1484 pci_iounmap(pdev, np->s.ioaddr);
1485 if (np->s.ramaddr)
1486 pci_iounmap(pdev, np->s.ramaddr);
1487 /*
1488 * Free O/S independent resources.
1489 */
1490 sym_hcb_free(np);
1491
1492 sym_mfree_dma(np, sizeof(*np), "HCB");
1493 }
1494
1495 /*
1496 * Ask/tell the system about DMA addressing.
1497 */
1498 static int sym_setup_bus_dma_mask(struct sym_hcb *np)
1499 {
1500 #if SYM_CONF_DMA_ADDRESSING_MODE > 0
1501 #if SYM_CONF_DMA_ADDRESSING_MODE == 1
1502 #define DMA_DAC_MASK 0x000000ffffffffffULL /* 40-bit */
1503 #elif SYM_CONF_DMA_ADDRESSING_MODE == 2
1504 #define DMA_DAC_MASK DMA_64BIT_MASK
1505 #endif
1506 if ((np->features & FE_DAC) &&
1507 !pci_set_dma_mask(np->s.device, DMA_DAC_MASK)) {
1508 np->use_dac = 1;
1509 return 0;
1510 }
1511 #endif
1512
1513 if (!pci_set_dma_mask(np->s.device, DMA_32BIT_MASK))
1514 return 0;
1515
1516 printf_warning("%s: No suitable DMA available\n", sym_name(np));
1517 return -1;
1518 }
1519
1520 /*
1521 * Host attach and initialisations.
1522 *
1523 * Allocate host data and ncb structure.
1524 * Remap MMIO region.
1525 * Do chip initialization.
1526 * If all is OK, install interrupt handling and
1527 * start the timer daemon.
1528 */
1529 static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
1530 int unit, struct sym_device *dev)
1531 {
1532 struct host_data *host_data;
1533 struct sym_hcb *np = NULL;
1534 struct Scsi_Host *instance = NULL;
1535 struct pci_dev *pdev = dev->pdev;
1536 unsigned long flags;
1537 struct sym_fw *fw;
1538
1539 printk(KERN_INFO
1540 "sym%d: <%s> rev 0x%x at pci %s irq " IRQ_FMT "\n",
1541 unit, dev->chip.name, dev->chip.revision_id,
1542 pci_name(pdev), IRQ_PRM(pdev->irq));
1543
1544 /*
1545 * Get the firmware for this chip.
1546 */
1547 fw = sym_find_firmware(&dev->chip);
1548 if (!fw)
1549 goto attach_failed;
1550
1551 /*
1552 * Allocate host_data structure
1553 */
1554 instance = scsi_host_alloc(tpnt, sizeof(*host_data));
1555 if (!instance)
1556 goto attach_failed;
1557 host_data = (struct host_data *) instance->hostdata;
1558
1559 /*
1560 * Allocate immediately the host control block,
1561 * since we are only expecting to succeed. :)
1562 * We keep track in the HCB of all the resources that
1563 * are to be released on error.
1564 */
1565 np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB");
1566 if (!np)
1567 goto attach_failed;
1568 np->s.device = pdev;
1569 np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */
1570 host_data->ncb = np;
1571 np->s.host = instance;
1572
1573 pci_set_drvdata(pdev, np);
1574
1575 /*
1576 * Copy some useful infos to the HCB.
1577 */
1578 np->hcb_ba = vtobus(np);
1579 np->verbose = sym_driver_setup.verbose;
1580 np->s.device = pdev;
1581 np->s.unit = unit;
1582 np->device_id = dev->chip.device_id;
1583 np->revision_id = dev->chip.revision_id;
1584 np->features = dev->chip.features;
1585 np->clock_divn = dev->chip.nr_divisor;
1586 np->maxoffs = dev->chip.offset_max;
1587 np->maxburst = dev->chip.burst_max;
1588 np->myaddr = dev->host_id;
1589
1590 /*
1591 * Edit its name.
1592 */
1593 strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name));
1594 sprintf(np->s.inst_name, "sym%d", np->s.unit);
1595
1596 if (sym_setup_bus_dma_mask(np))
1597 goto attach_failed;
1598
1599 /*
1600 * Try to map the controller chip to
1601 * virtual and physical memory.
1602 */
1603 np->mmio_ba = (u32)dev->mmio_base;
1604 np->s.ioaddr = dev->s.ioaddr;
1605 np->s.ramaddr = dev->s.ramaddr;
1606 np->s.io_ws = (np->features & FE_IO256) ? 256 : 128;
1607
1608 /*
1609 * Map on-chip RAM if present and supported.
1610 */
1611 if (!(np->features & FE_RAM))
1612 dev->ram_base = 0;
1613 if (dev->ram_base) {
1614 np->ram_ba = (u32)dev->ram_base;
1615 np->ram_ws = (np->features & FE_RAM8K) ? 8192 : 4096;
1616 }
1617
1618 if (sym_hcb_attach(instance, fw, dev->nvram))
1619 goto attach_failed;
1620
1621 /*
1622 * Install the interrupt handler.
1623 * If we synchonize the C code with SCRIPTS on interrupt,
1624 * we do not want to share the INTR line at all.
1625 */
1626 if (request_irq(pdev->irq, sym53c8xx_intr, SA_SHIRQ, NAME53C8XX, np)) {
1627 printf_err("%s: request irq %d failure\n",
1628 sym_name(np), pdev->irq);
1629 goto attach_failed;
1630 }
1631 np->s.irq = pdev->irq;
1632
1633 /*
1634 * After SCSI devices have been opened, we cannot
1635 * reset the bus safely, so we do it here.
1636 */
1637 spin_lock_irqsave(instance->host_lock, flags);
1638 if (sym_reset_scsi_bus(np, 0))
1639 goto reset_failed;
1640
1641 /*
1642 * Start the SCRIPTS.
1643 */
1644 sym_start_up (np, 1);
1645
1646 /*
1647 * Start the timer daemon
1648 */
1649 init_timer(&np->s.timer);
1650 np->s.timer.data = (unsigned long) np;
1651 np->s.timer.function = sym53c8xx_timer;
1652 np->s.lasttime=0;
1653 sym_timer (np);
1654
1655 /*
1656 * Fill Linux host instance structure
1657 * and return success.
1658 */
1659 instance->max_channel = 0;
1660 instance->this_id = np->myaddr;
1661 instance->max_id = np->maxwide ? 16 : 8;
1662 instance->max_lun = SYM_CONF_MAX_LUN;
1663 instance->unique_id = pci_resource_start(pdev, 0);
1664 instance->cmd_per_lun = SYM_CONF_MAX_TAG;
1665 instance->can_queue = (SYM_CONF_MAX_START-2);
1666 instance->sg_tablesize = SYM_CONF_MAX_SG;
1667 instance->max_cmd_len = 16;
1668 BUG_ON(sym2_transport_template == NULL);
1669 instance->transportt = sym2_transport_template;
1670
1671 spin_unlock_irqrestore(instance->host_lock, flags);
1672
1673 return instance;
1674
1675 reset_failed:
1676 printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
1677 "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
1678 spin_unlock_irqrestore(instance->host_lock, flags);
1679 attach_failed:
1680 if (!instance)
1681 return NULL;
1682 printf_info("%s: giving up ...\n", sym_name(np));
1683 if (np)
1684 sym_free_resources(np, pdev);
1685 scsi_host_put(instance);
1686
1687 return NULL;
1688 }
1689
1690
1691 /*
1692 * Detect and try to read SYMBIOS and TEKRAM NVRAM.
1693 */
1694 #if SYM_CONF_NVRAM_SUPPORT
1695 static void __devinit sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1696 {
1697 devp->nvram = nvp;
1698 devp->device_id = devp->chip.device_id;
1699 nvp->type = 0;
1700
1701 sym_read_nvram(devp, nvp);
1702 }
1703 #else
1704 static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp)
1705 {
1706 }
1707 #endif /* SYM_CONF_NVRAM_SUPPORT */
1708
1709 static int __devinit sym_check_supported(struct sym_device *device)
1710 {
1711 struct sym_chip *chip;
1712 struct pci_dev *pdev = device->pdev;
1713 u_char revision;
1714 unsigned long io_port = pci_resource_start(pdev, 0);
1715 int i;
1716
1717 /*
1718 * If user excluded this chip, do not initialize it.
1719 * I hate this code so much. Must kill it.
1720 */
1721 if (io_port) {
1722 for (i = 0 ; i < 8 ; i++) {
1723 if (sym_driver_setup.excludes[i] == io_port)
1724 return -ENODEV;
1725 }
1726 }
1727
1728 /*
1729 * Check if the chip is supported. Then copy the chip description
1730 * to our device structure so we can make it match the actual device
1731 * and options.
1732 */
1733 pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
1734 chip = sym_lookup_chip_table(pdev->device, revision);
1735 if (!chip) {
1736 dev_info(&pdev->dev, "device not supported\n");
1737 return -ENODEV;
1738 }
1739 memcpy(&device->chip, chip, sizeof(device->chip));
1740 device->chip.revision_id = revision;
1741
1742 return 0;
1743 }
1744
1745 /*
1746 * Ignore Symbios chips controlled by various RAID controllers.
1747 * These controllers set value 0x52414944 at RAM end - 16.
1748 */
1749 static int __devinit sym_check_raid(struct sym_device *device)
1750 {
1751 unsigned int ram_size, ram_val;
1752
1753 if (!device->s.ramaddr)
1754 return 0;
1755
1756 if (device->chip.features & FE_RAM8K)
1757 ram_size = 8192;
1758 else
1759 ram_size = 4096;
1760
1761 ram_val = readl(device->s.ramaddr + ram_size - 16);
1762 if (ram_val != 0x52414944)
1763 return 0;
1764
1765 dev_info(&device->pdev->dev,
1766 "not initializing, driven by RAID controller.\n");
1767 return -ENODEV;
1768 }
1769
1770 static int __devinit sym_set_workarounds(struct sym_device *device)
1771 {
1772 struct sym_chip *chip = &device->chip;
1773 struct pci_dev *pdev = device->pdev;
1774 u_short status_reg;
1775
1776 /*
1777 * (ITEM 12 of a DEL about the 896 I haven't yet).
1778 * We must ensure the chip will use WRITE AND INVALIDATE.
1779 * The revision number limit is for now arbitrary.
1780 */
1781 if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && chip->revision_id < 0x4) {
1782 chip->features |= (FE_WRIE | FE_CLSE);
1783 }
1784
1785 /* If the chip can do Memory Write Invalidate, enable it */
1786 if (chip->features & FE_WRIE) {
1787 if (pci_set_mwi(pdev))
1788 return -ENODEV;
1789 }
1790
1791 /*
1792 * Work around for errant bit in 895A. The 66Mhz
1793 * capable bit is set erroneously. Clear this bit.
1794 * (Item 1 DEL 533)
1795 *
1796 * Make sure Config space and Features agree.
1797 *
1798 * Recall: writes are not normal to status register -
1799 * write a 1 to clear and a 0 to leave unchanged.
1800 * Can only reset bits.
1801 */
1802 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1803 if (chip->features & FE_66MHZ) {
1804 if (!(status_reg & PCI_STATUS_66MHZ))
1805 chip->features &= ~FE_66MHZ;
1806 } else {
1807 if (status_reg & PCI_STATUS_66MHZ) {
1808 status_reg = PCI_STATUS_66MHZ;
1809 pci_write_config_word(pdev, PCI_STATUS, status_reg);
1810 pci_read_config_word(pdev, PCI_STATUS, &status_reg);
1811 }
1812 }
1813
1814 return 0;
1815 }
1816
1817 /*
1818 * Read and check the PCI configuration for any detected NCR
1819 * boards and save data for attaching after all boards have
1820 * been detected.
1821 */
1822 static void __devinit
1823 sym_init_device(struct pci_dev *pdev, struct sym_device *device)
1824 {
1825 int i;
1826
1827 device->host_id = SYM_SETUP_HOST_ID;
1828 device->pdev = pdev;
1829
1830 i = pci_get_base_address(pdev, 1, &device->mmio_base);
1831 pci_get_base_address(pdev, i, &device->ram_base);
1832
1833 #ifndef CONFIG_SCSI_SYM53C8XX_IOMAPPED
1834 if (device->mmio_base)
1835 device->s.ioaddr = pci_iomap(pdev, 1,
1836 pci_resource_len(pdev, 1));
1837 #endif
1838 if (!device->s.ioaddr)
1839 device->s.ioaddr = pci_iomap(pdev, 0,
1840 pci_resource_len(pdev, 0));
1841 if (device->ram_base)
1842 device->s.ramaddr = pci_iomap(pdev, i,
1843 pci_resource_len(pdev, i));
1844 }
1845
1846 /*
1847 * The NCR PQS and PDS cards are constructed as a DEC bridge
1848 * behind which sits a proprietary NCR memory controller and
1849 * either four or two 53c875s as separate devices. We can tell
1850 * if an 875 is part of a PQS/PDS or not since if it is, it will
1851 * be on the same bus as the memory controller. In its usual
1852 * mode of operation, the 875s are slaved to the memory
1853 * controller for all transfers. To operate with the Linux
1854 * driver, the memory controller is disabled and the 875s
1855 * freed to function independently. The only wrinkle is that
1856 * the preset SCSI ID (which may be zero) must be read in from
1857 * a special configuration space register of the 875.
1858 */
1859 static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev)
1860 {
1861 int slot;
1862 u8 tmp;
1863
1864 for (slot = 0; slot < 256; slot++) {
1865 struct pci_dev *memc = pci_get_slot(pdev->bus, slot);
1866
1867 if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) {
1868 pci_dev_put(memc);
1869 continue;
1870 }
1871
1872 /* bit 1: allow individual 875 configuration */
1873 pci_read_config_byte(memc, 0x44, &tmp);
1874 if ((tmp & 0x2) == 0) {
1875 tmp |= 0x2;
1876 pci_write_config_byte(memc, 0x44, tmp);
1877 }
1878
1879 /* bit 2: drive individual 875 interrupts to the bus */
1880 pci_read_config_byte(memc, 0x45, &tmp);
1881 if ((tmp & 0x4) == 0) {
1882 tmp |= 0x4;
1883 pci_write_config_byte(memc, 0x45, tmp);
1884 }
1885
1886 pci_dev_put(memc);
1887 break;
1888 }
1889
1890 pci_read_config_byte(pdev, 0x84, &tmp);
1891 sym_dev->host_id = tmp;
1892 }
1893
1894 /*
1895 * Called before unloading the module.
1896 * Detach the host.
1897 * We have to free resources and halt the NCR chip.
1898 */
1899 static int sym_detach(struct sym_hcb *np, struct pci_dev *pdev)
1900 {
1901 printk("%s: detaching ...\n", sym_name(np));
1902
1903 del_timer_sync(&np->s.timer);
1904
1905 /*
1906 * Reset NCR chip.
1907 * We should use sym_soft_reset(), but we don't want to do
1908 * so, since we may not be safe if interrupts occur.
1909 */
1910 printk("%s: resetting chip\n", sym_name(np));
1911 OUTB(np, nc_istat, SRST);
1912 INB(np, nc_mbox1);
1913 udelay(10);
1914 OUTB(np, nc_istat, 0);
1915
1916 sym_free_resources(np, pdev);
1917
1918 return 1;
1919 }
1920
1921 /*
1922 * Driver host template.
1923 */
1924 static struct scsi_host_template sym2_template = {
1925 .module = THIS_MODULE,
1926 .name = "sym53c8xx",
1927 .info = sym53c8xx_info,
1928 .queuecommand = sym53c8xx_queue_command,
1929 .slave_alloc = sym53c8xx_slave_alloc,
1930 .slave_configure = sym53c8xx_slave_configure,
1931 .slave_destroy = sym53c8xx_slave_destroy,
1932 .eh_abort_handler = sym53c8xx_eh_abort_handler,
1933 .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler,
1934 .eh_bus_reset_handler = sym53c8xx_eh_bus_reset_handler,
1935 .eh_host_reset_handler = sym53c8xx_eh_host_reset_handler,
1936 .this_id = 7,
1937 .use_clustering = DISABLE_CLUSTERING,
1938 #ifdef SYM_LINUX_PROC_INFO_SUPPORT
1939 .proc_info = sym53c8xx_proc_info,
1940 .proc_name = NAME53C8XX,
1941 #endif
1942 };
1943
1944 static int attach_count;
1945
1946 static int __devinit sym2_probe(struct pci_dev *pdev,
1947 const struct pci_device_id *ent)
1948 {
1949 struct sym_device sym_dev;
1950 struct sym_nvram nvram;
1951 struct Scsi_Host *instance;
1952
1953 memset(&sym_dev, 0, sizeof(sym_dev));
1954 memset(&nvram, 0, sizeof(nvram));
1955
1956 if (pci_enable_device(pdev))
1957 goto leave;
1958
1959 pci_set_master(pdev);
1960
1961 if (pci_request_regions(pdev, NAME53C8XX))
1962 goto disable;
1963
1964 sym_init_device(pdev, &sym_dev);
1965 if (sym_check_supported(&sym_dev))
1966 goto free;
1967
1968 if (sym_check_raid(&sym_dev))
1969 goto leave; /* Don't disable the device */
1970
1971 if (sym_set_workarounds(&sym_dev))
1972 goto free;
1973
1974 sym_config_pqs(pdev, &sym_dev);
1975
1976 sym_get_nvram(&sym_dev, &nvram);
1977
1978 instance = sym_attach(&sym2_template, attach_count, &sym_dev);
1979 if (!instance)
1980 goto free;
1981
1982 if (scsi_add_host(instance, &pdev->dev))
1983 goto detach;
1984 scsi_scan_host(instance);
1985
1986 attach_count++;
1987
1988 return 0;
1989
1990 detach:
1991 sym_detach(pci_get_drvdata(pdev), pdev);
1992 free:
1993 pci_release_regions(pdev);
1994 disable:
1995 pci_disable_device(pdev);
1996 leave:
1997 return -ENODEV;
1998 }
1999
2000 static void __devexit sym2_remove(struct pci_dev *pdev)
2001 {
2002 struct sym_hcb *np = pci_get_drvdata(pdev);
2003 struct Scsi_Host *host = np->s.host;
2004
2005 scsi_remove_host(host);
2006 scsi_host_put(host);
2007
2008 sym_detach(np, pdev);
2009
2010 pci_release_regions(pdev);
2011 pci_disable_device(pdev);
2012
2013 attach_count--;
2014 }
2015
2016 static void sym2_get_signalling(struct Scsi_Host *shost)
2017 {
2018 struct sym_hcb *np = sym_get_hcb(shost);
2019 enum spi_signal_type type;
2020
2021 switch (np->scsi_mode) {
2022 case SMODE_SE:
2023 type = SPI_SIGNAL_SE;
2024 break;
2025 case SMODE_LVD:
2026 type = SPI_SIGNAL_LVD;
2027 break;
2028 case SMODE_HVD:
2029 type = SPI_SIGNAL_HVD;
2030 break;
2031 default:
2032 type = SPI_SIGNAL_UNKNOWN;
2033 break;
2034 }
2035 spi_signalling(shost) = type;
2036 }
2037
2038 static void sym2_set_offset(struct scsi_target *starget, int offset)
2039 {
2040 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2041 struct sym_hcb *np = sym_get_hcb(shost);
2042 struct sym_tcb *tp = &np->target[starget->id];
2043
2044 tp->tgoal.offset = offset;
2045 tp->tgoal.check_nego = 1;
2046 }
2047
2048 static void sym2_set_period(struct scsi_target *starget, int period)
2049 {
2050 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2051 struct sym_hcb *np = sym_get_hcb(shost);
2052 struct sym_tcb *tp = &np->target[starget->id];
2053
2054 /* have to have DT for these transfers, but DT will also
2055 * set width, so check that this is allowed */
2056 if (period <= np->minsync && spi_width(starget))
2057 tp->tgoal.dt = 1;
2058
2059 tp->tgoal.period = period;
2060 tp->tgoal.check_nego = 1;
2061 }
2062
2063 static void sym2_set_width(struct scsi_target *starget, int width)
2064 {
2065 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2066 struct sym_hcb *np = sym_get_hcb(shost);
2067 struct sym_tcb *tp = &np->target[starget->id];
2068
2069 /* It is illegal to have DT set on narrow transfers. If DT is
2070 * clear, we must also clear IU and QAS. */
2071 if (width == 0)
2072 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2073
2074 tp->tgoal.width = width;
2075 tp->tgoal.check_nego = 1;
2076 }
2077
2078 static void sym2_set_dt(struct scsi_target *starget, int dt)
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 /* We must clear QAS and IU if DT is clear */
2085 if (dt)
2086 tp->tgoal.dt = 1;
2087 else
2088 tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0;
2089 tp->tgoal.check_nego = 1;
2090 }
2091
2092 #if 0
2093 static void sym2_set_iu(struct scsi_target *starget, int iu)
2094 {
2095 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2096 struct sym_hcb *np = sym_get_hcb(shost);
2097 struct sym_tcb *tp = &np->target[starget->id];
2098
2099 if (iu)
2100 tp->tgoal.iu = tp->tgoal.dt = 1;
2101 else
2102 tp->tgoal.iu = 0;
2103 tp->tgoal.check_nego = 1;
2104 }
2105
2106 static void sym2_set_qas(struct scsi_target *starget, int qas)
2107 {
2108 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2109 struct sym_hcb *np = sym_get_hcb(shost);
2110 struct sym_tcb *tp = &np->target[starget->id];
2111
2112 if (qas)
2113 tp->tgoal.dt = tp->tgoal.qas = 1;
2114 else
2115 tp->tgoal.qas = 0;
2116 tp->tgoal.check_nego = 1;
2117 }
2118 #endif
2119
2120 static struct spi_function_template sym2_transport_functions = {
2121 .set_offset = sym2_set_offset,
2122 .show_offset = 1,
2123 .set_period = sym2_set_period,
2124 .show_period = 1,
2125 .set_width = sym2_set_width,
2126 .show_width = 1,
2127 .set_dt = sym2_set_dt,
2128 .show_dt = 1,
2129 #if 0
2130 .set_iu = sym2_set_iu,
2131 .show_iu = 1,
2132 .set_qas = sym2_set_qas,
2133 .show_qas = 1,
2134 #endif
2135 .get_signalling = sym2_get_signalling,
2136 };
2137
2138 static struct pci_device_id sym2_id_table[] __devinitdata = {
2139 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810,
2140 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2141 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820,
2142 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2143 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825,
2144 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2145 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815,
2146 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2147 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP,
2148 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2149 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860,
2150 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2151 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510,
2152 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2153 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896,
2154 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2155 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895,
2156 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2157 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885,
2158 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2159 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875,
2160 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2161 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510,
2162 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */
2163 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A,
2164 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2165 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A,
2166 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2167 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33,
2168 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2169 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66,
2170 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2171 { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J,
2172 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
2173 { 0, }
2174 };
2175
2176 MODULE_DEVICE_TABLE(pci, sym2_id_table);
2177
2178 static struct pci_driver sym2_driver = {
2179 .name = NAME53C8XX,
2180 .id_table = sym2_id_table,
2181 .probe = sym2_probe,
2182 .remove = __devexit_p(sym2_remove),
2183 };
2184
2185 static int __init sym2_init(void)
2186 {
2187 int error;
2188
2189 sym2_setup_params();
2190 sym2_transport_template = spi_attach_transport(&sym2_transport_functions);
2191 if (!sym2_transport_template)
2192 return -ENODEV;
2193
2194 error = pci_register_driver(&sym2_driver);
2195 if (error)
2196 spi_release_transport(sym2_transport_template);
2197 return error;
2198 }
2199
2200 static void __exit sym2_exit(void)
2201 {
2202 pci_unregister_driver(&sym2_driver);
2203 spi_release_transport(sym2_transport_template);
2204 }
2205
2206 module_init(sym2_init);
2207 module_exit(sym2_exit);
linux kernel for loongson