1 /*-
2 * Copyright (c) 2000 Michael Smith
3 * Copyright (c) 2003 Paul Saab
4 * Copyright (c) 2003 Vinod Kashyap
5 * Copyright (c) 2000 BSDi
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: src/sys/dev/twe/twe.c,v 1.34 2012/11/17 01:52:19 svnexp Exp $
30 */
31
32 /*
33 * Driver for the 3ware Escalade family of IDE RAID controllers.
34 */
35
36 #include <dev/raid/twe/twe_compat.h>
37 #include <dev/raid/twe/twereg.h>
38 #include <dev/raid/twe/tweio.h>
39 #include <dev/raid/twe/twevar.h>
40 #define TWE_DEFINE_TABLES
41 #include <dev/raid/twe/twe_tables.h>
42
43 /*
44 * Command submission.
45 */
46 static int twe_get_param_1(struct twe_softc *sc, int table_id, int param_id, u_int8_t *result);
47 static int twe_get_param_2(struct twe_softc *sc, int table_id, int param_id, u_int16_t *result);
48 static int twe_get_param_4(struct twe_softc *sc, int table_id, int param_id, u_int32_t *result);
49 static void *twe_get_param(struct twe_softc *sc, int table_id, int parameter_id, size_t size,
50 void (* func)(struct twe_request *tr));
51 #ifdef TWE_SHUTDOWN_NOTIFICATION
52 static int twe_set_param_1(struct twe_softc *sc, int table_id, int param_id, u_int8_t value);
53 #endif
54 #if 0
55 static int twe_set_param_2(struct twe_softc *sc, int table_id, int param_id, u_int16_t value);
56 static int twe_set_param_4(struct twe_softc *sc, int table_id, int param_id, u_int32_t value);
57 #endif
58 static int twe_set_param(struct twe_softc *sc, int table_id, int param_id, int param_size,
59 void *data);
60 static int twe_init_connection(struct twe_softc *sc, int mode);
61 static int twe_wait_request(struct twe_request *tr);
62 static int twe_immediate_request(struct twe_request *tr, int usetmp);
63 static void twe_completeio(struct twe_request *tr);
64 static void twe_reset(struct twe_softc *sc);
65 static int twe_add_unit(struct twe_softc *sc, int unit);
66 static int twe_del_unit(struct twe_softc *sc, int unit);
67
68 /*
69 * Command I/O to controller.
70 */
71 static void twe_done(struct twe_softc *sc, int startio);
72 static void twe_complete(struct twe_softc *sc);
73 static int twe_wait_status(struct twe_softc *sc, u_int32_t status, int timeout);
74 static int twe_drain_response_queue(struct twe_softc *sc);
75 static int twe_check_bits(struct twe_softc *sc, u_int32_t status_reg);
76 static int twe_soft_reset(struct twe_softc *sc);
77
78 /*
79 * Interrupt handling.
80 */
81 static void twe_host_intr(struct twe_softc *sc);
82 static void twe_attention_intr(struct twe_softc *sc);
83 static void twe_command_intr(struct twe_softc *sc);
84
85 /*
86 * Asynchronous event handling.
87 */
88 static int twe_fetch_aen(struct twe_softc *sc);
89 static void twe_handle_aen(struct twe_request *tr);
90 static void twe_enqueue_aen(struct twe_softc *sc, u_int16_t aen);
91 static u_int16_t twe_dequeue_aen(struct twe_softc *sc);
92 static int twe_drain_aen_queue(struct twe_softc *sc);
93 static int twe_find_aen(struct twe_softc *sc, u_int16_t aen);
94
95 /*
96 * Command buffer management.
97 */
98 static int twe_get_request(struct twe_softc *sc, struct twe_request **tr);
99 static void twe_release_request(struct twe_request *tr);
100
101 /*
102 * Debugging.
103 */
104 static char *twe_format_aen(struct twe_softc *sc, u_int16_t aen);
105 static int twe_report_request(struct twe_request *tr);
106 static void twe_panic(struct twe_softc *sc, char *reason);
107
108 /********************************************************************************
109 ********************************************************************************
110 Public Interfaces
111 ********************************************************************************
112 ********************************************************************************/
113
114 /********************************************************************************
115 * Initialise the controller, set up driver data structures.
116 */
117 int
twe_setup(struct twe_softc * sc)118 twe_setup(struct twe_softc *sc)
119 {
120 struct twe_request *tr;
121 TWE_Command *cmd;
122 u_int32_t status_reg;
123 int i;
124
125 debug_called(4);
126
127 /*
128 * Initialise request queues.
129 */
130 twe_initq_free(sc);
131 twe_initq_bio(sc);
132 twe_initq_ready(sc);
133 twe_initq_busy(sc);
134 twe_initq_complete(sc);
135 sc->twe_wait_aen = -1;
136
137 /*
138 * Allocate request structures up front.
139 */
140 for (i = 0; i < TWE_Q_LENGTH; i++) {
141 if ((tr = twe_allocate_request(sc, i)) == NULL)
142 return(ENOMEM);
143 /*
144 * Set global defaults that won't change.
145 */
146 cmd = TWE_FIND_COMMAND(tr);
147 cmd->generic.host_id = sc->twe_host_id; /* controller-assigned host ID */
148 cmd->generic.request_id = i; /* our index number */
149 sc->twe_lookup[i] = tr;
150
151 /*
152 * Put command onto the freelist.
153 */
154 TWE_IO_LOCK(sc);
155 twe_release_request(tr);
156 TWE_IO_UNLOCK(sc);
157 }
158 TWE_IO_LOCK(sc);
159
160 /*
161 * Check status register for errors, clear them.
162 */
163 status_reg = TWE_STATUS(sc);
164 twe_check_bits(sc, status_reg);
165
166 /*
167 * Wait for the controller to come ready.
168 */
169 if (twe_wait_status(sc, TWE_STATUS_MICROCONTROLLER_READY, 60)) {
170 TWE_IO_UNLOCK(sc);
171 twe_printf(sc, "microcontroller not ready\n");
172 return(ENXIO);
173 }
174
175 /*
176 * Disable interrupts from the card.
177 */
178 twe_disable_interrupts(sc);
179
180 /*
181 * Soft reset the controller, look for the AEN acknowledging the reset,
182 * check for errors, drain the response queue.
183 */
184 for (i = 0; i < TWE_MAX_RESET_TRIES; i++) {
185
186 if (i > 0)
187 twe_printf(sc, "reset %d failed, trying again\n", i);
188
189 if (!twe_soft_reset(sc))
190 break; /* reset process complete */
191 }
192 TWE_IO_UNLOCK(sc);
193 /* did we give up? */
194 if (i >= TWE_MAX_RESET_TRIES) {
195 twe_printf(sc, "can't initialise controller, giving up\n");
196 return(ENXIO);
197 }
198
199 return(0);
200 }
201
202 static int
twe_add_unit(struct twe_softc * sc,int unit)203 twe_add_unit(struct twe_softc *sc, int unit)
204 {
205 struct twe_drive *dr;
206 int table, error = 0;
207 u_int16_t dsize;
208 TWE_Param *drives = NULL, *param = NULL;
209 TWE_Array_Descriptor *ud;
210
211 TWE_CONFIG_ASSERT_LOCKED(sc);
212 if (unit < 0 || unit > TWE_MAX_UNITS)
213 return (EINVAL);
214
215 /*
216 * The controller is in a safe state, so try to find drives attached to it.
217 */
218 TWE_IO_LOCK(sc);
219 if ((drives = twe_get_param(sc, TWE_PARAM_UNITSUMMARY, TWE_PARAM_UNITSUMMARY_Status,
220 TWE_MAX_UNITS, NULL)) == NULL) {
221 TWE_IO_UNLOCK(sc);
222 twe_printf(sc, "can't detect attached units\n");
223 return (EIO);
224 }
225
226 dr = &sc->twe_drive[unit];
227 /* check that the drive is online */
228 if (!(drives->data[unit] & TWE_PARAM_UNITSTATUS_Online)) {
229 TWE_IO_UNLOCK(sc);
230 error = ENXIO;
231 goto out;
232 }
233
234 table = TWE_PARAM_UNITINFO + unit;
235
236 if (twe_get_param_4(sc, table, TWE_PARAM_UNITINFO_Capacity, &dr->td_size)) {
237 TWE_IO_UNLOCK(sc);
238 twe_printf(sc, "error fetching capacity for unit %d\n", unit);
239 error = EIO;
240 goto out;
241 }
242 if (twe_get_param_1(sc, table, TWE_PARAM_UNITINFO_Status, &dr->td_state)) {
243 TWE_IO_UNLOCK(sc);
244 twe_printf(sc, "error fetching state for unit %d\n", unit);
245 error = EIO;
246 goto out;
247 }
248 if (twe_get_param_2(sc, table, TWE_PARAM_UNITINFO_DescriptorSize, &dsize)) {
249 TWE_IO_UNLOCK(sc);
250 twe_printf(sc, "error fetching descriptor size for unit %d\n", unit);
251 error = EIO;
252 goto out;
253 }
254 if ((param = twe_get_param(sc, table, TWE_PARAM_UNITINFO_Descriptor, dsize - 3, NULL)) == NULL) {
255 TWE_IO_UNLOCK(sc);
256 twe_printf(sc, "error fetching descriptor for unit %d\n", unit);
257 error = EIO;
258 goto out;
259 }
260 ud = (TWE_Array_Descriptor *)param->data;
261 dr->td_type = ud->configuration;
262
263 /* build synthetic geometry as per controller internal rules */
264 if (dr->td_size > 0x200000) {
265 dr->td_heads = 255;
266 dr->td_sectors = 63;
267 } else {
268 dr->td_heads = 64;
269 dr->td_sectors = 32;
270 }
271 dr->td_cylinders = dr->td_size / (dr->td_heads * dr->td_sectors);
272 dr->td_twe_unit = unit;
273 TWE_IO_UNLOCK(sc);
274
275 error = twe_attach_drive(sc, dr);
276
277 out:
278 if (param != NULL)
279 kfree(param, M_DEVBUF);
280 if (drives != NULL)
281 kfree(drives, M_DEVBUF);
282 return (error);
283 }
284
285 static int
twe_del_unit(struct twe_softc * sc,int unit)286 twe_del_unit(struct twe_softc *sc, int unit)
287 {
288 int error;
289
290 TWE_CONFIG_ASSERT_LOCKED(sc);
291 if (unit < 0 || unit >= TWE_MAX_UNITS)
292 return (ENXIO);
293
294 if (sc->twe_drive[unit].td_disk == NULL)
295 return (ENXIO);
296
297 error = twe_detach_drive(sc, unit);
298 return (error);
299 }
300
301 /********************************************************************************
302 * Locate disk devices and attach children to them.
303 */
304 void
twe_init(struct twe_softc * sc)305 twe_init(struct twe_softc *sc)
306 {
307 int i;
308
309 /*
310 * Scan for drives
311 */
312 TWE_CONFIG_LOCK(sc);
313 for (i = 0; i < TWE_MAX_UNITS; i++)
314 twe_add_unit(sc, i);
315 TWE_CONFIG_UNLOCK(sc);
316
317 /*
318 * Initialise connection with controller.
319 */
320 TWE_IO_LOCK(sc);
321 twe_init_connection(sc, TWE_INIT_MESSAGE_CREDITS);
322
323 #ifdef TWE_SHUTDOWN_NOTIFICATION
324 /*
325 * Tell the controller we support shutdown notification.
326 */
327 twe_set_param_1(sc, TWE_PARAM_FEATURES, TWE_PARAM_FEATURES_DriverShutdown, 1);
328 #endif
329
330 /*
331 * Mark controller up and ready to run.
332 */
333 sc->twe_state &= ~TWE_STATE_SHUTDOWN;
334
335 /*
336 * Finally enable interrupts.
337 */
338 twe_enable_interrupts(sc);
339 TWE_IO_UNLOCK(sc);
340 }
341
342 /********************************************************************************
343 * Stop the controller
344 */
345 void
twe_deinit(struct twe_softc * sc)346 twe_deinit(struct twe_softc *sc)
347 {
348 /*
349 * Mark the controller as shutting down, and disable any further interrupts.
350 */
351 twe_lockassert(&sc->twe_io_lock);
352 sc->twe_state |= TWE_STATE_SHUTDOWN;
353 twe_disable_interrupts(sc);
354
355 #ifdef TWE_SHUTDOWN_NOTIFICATION
356 /*
357 * Disconnect from the controller
358 */
359 twe_init_connection(sc, TWE_SHUTDOWN_MESSAGE_CREDITS);
360 #endif
361 }
362
363 /*******************************************************************************
364 * Take an interrupt, or be poked by other code to look for interrupt-worthy
365 * status.
366 */
367 void
twe_intr(struct twe_softc * sc)368 twe_intr(struct twe_softc *sc)
369 {
370 u_int32_t status_reg;
371
372 debug_called(4);
373
374 /*
375 * Collect current interrupt status.
376 */
377 status_reg = TWE_STATUS(sc);
378 twe_check_bits(sc, status_reg);
379
380 /*
381 * Dispatch based on interrupt status
382 */
383 if (status_reg & TWE_STATUS_HOST_INTERRUPT)
384 twe_host_intr(sc);
385 if (status_reg & TWE_STATUS_ATTENTION_INTERRUPT)
386 twe_attention_intr(sc);
387 if (status_reg & TWE_STATUS_COMMAND_INTERRUPT)
388 twe_command_intr(sc);
389 if (status_reg & TWE_STATUS_RESPONSE_INTERRUPT)
390 twe_done(sc, 1);
391 }
392
393 /********************************************************************************
394 * Pull as much work off the softc's work queue as possible and give it to the
395 * controller.
396 */
397 void
twe_startio(struct twe_softc * sc)398 twe_startio(struct twe_softc *sc)
399 {
400 struct twe_request *tr;
401 TWE_Command *cmd;
402 struct bio *bio;
403 struct buf *bp;
404 int error;
405
406 debug_called(4);
407
408 twe_lockassert(&sc->twe_io_lock);
409 if (sc->twe_state & (TWE_STATE_CTLR_BUSY | TWE_STATE_FRZN))
410 return;
411
412 /* spin until something prevents us from doing any work */
413 for (;;) {
414
415 /* try to get a command that's already ready to go */
416 tr = twe_dequeue_ready(sc);
417
418 /* build a command from an outstanding bio */
419 if (tr == NULL) {
420
421 /* get a command to handle the bio with */
422 if (twe_get_request(sc, &tr))
423 break;
424
425 /* see if there's work to be done */
426 if ((bio = twe_dequeue_bio(sc)) == NULL) {
427 twe_release_request(tr);
428 break;
429 }
430 bp = bio->bio_buf;
431
432 /* connect the bio to the command */
433 tr->tr_complete = twe_completeio;
434 tr->tr_private = bio;
435 tr->tr_data = bp->b_data;
436 tr->tr_length = bp->b_bcount;
437 cmd = TWE_FIND_COMMAND(tr);
438 if (bp->b_cmd == BUF_CMD_READ) {
439 tr->tr_flags |= TWE_CMD_DATAIN;
440 cmd->io.opcode = TWE_OP_READ;
441 } else {
442 tr->tr_flags |= TWE_CMD_DATAOUT;
443 cmd->io.opcode = TWE_OP_WRITE;
444 }
445
446 /* build a suitable I/O command (assumes 512-byte rounded transfers) */
447 cmd->io.size = 3;
448 cmd->io.unit = ((struct twed_softc *)bio->bio_driver_info)->twed_drive->td_twe_unit;
449 cmd->io.block_count = (tr->tr_length + TWE_BLOCK_SIZE - 1) / TWE_BLOCK_SIZE;
450 cmd->io.lba = (u_int32_t)(bio->bio_offset / TWE_BLOCK_SIZE);
451 KKASSERT(bio->bio_offset < 0x100000000ULL * TWE_BLOCK_SIZE);
452 }
453
454 /* did we find something to do? */
455 if (tr == NULL)
456 break;
457
458 /* try to map and submit the command to controller */
459 error = twe_map_request(tr);
460
461 if (error != 0) {
462 if (error == EBUSY)
463 break;
464 tr->tr_status = TWE_CMD_ERROR;
465 if (tr->tr_private != NULL) {
466 bio = (struct bio *)(tr->tr_private);
467 bp = bio->bio_buf;
468 bp->b_error = error;
469 bp->b_flags |= B_ERROR;
470 tr->tr_private = NULL;
471 twed_intr(bio);
472 twe_release_request(tr);
473 } else if (tr->tr_flags & TWE_CMD_SLEEPER)
474 wakeup_one(tr); /* wakeup the sleeping owner */
475 }
476 }
477 }
478
479 /********************************************************************************
480 * Write blocks from memory to disk, for system crash dumps.
481 */
482 int
twe_dump_blocks(struct twe_softc * sc,int unit,u_int64_t lba,void * data,int nblks)483 twe_dump_blocks(struct twe_softc *sc, int unit, u_int64_t lba, void *data, int nblks)
484 {
485 struct twe_request *tr;
486 TWE_Command *cmd;
487 int error;
488
489 if (twe_get_request(sc, &tr))
490 return(ENOMEM);
491
492 KKASSERT(lba < 0x100000000ULL);
493
494 tr->tr_data = data;
495 tr->tr_status = TWE_CMD_SETUP;
496 tr->tr_length = nblks * TWE_BLOCK_SIZE;
497 tr->tr_flags = TWE_CMD_DATAOUT;
498
499 cmd = TWE_FIND_COMMAND(tr);
500 cmd->io.opcode = TWE_OP_WRITE;
501 cmd->io.size = 3;
502 cmd->io.unit = unit;
503 cmd->io.block_count = nblks;
504 cmd->io.lba = lba;
505
506 error = twe_immediate_request(tr, 0);
507 if (error == 0)
508 if (twe_report_request(tr))
509 error = EIO;
510 twe_release_request(tr);
511 return(error);
512 }
513
514 /********************************************************************************
515 * Handle controller-specific control operations.
516 */
517 int
twe_ioctl(struct twe_softc * sc,u_long ioctlcmd,void * addr)518 twe_ioctl(struct twe_softc *sc, u_long ioctlcmd, void *addr)
519 {
520 struct twe_usercommand *tu = (struct twe_usercommand *)addr;
521 struct twe_paramcommand *tp = (struct twe_paramcommand *)addr;
522 struct twe_drivecommand *td = (struct twe_drivecommand *)addr;
523 union twe_statrequest *ts = (union twe_statrequest *)addr;
524 TWE_Param *param;
525 TWE_Command *cmd;
526 void *data;
527 u_int16_t *aen_code = (u_int16_t *)addr;
528 struct twe_request *tr;
529 u_int8_t srid;
530 int error;
531 size_t tr_length;
532
533 error = 0;
534 switch(ioctlcmd) {
535 /* handle a command from userspace */
536 case TWEIO_COMMAND:
537 /*
538 * if there's a data buffer, allocate and copy it in.
539 * Must be in multipled of 512 bytes.
540 */
541 tr_length = roundup2(tu->tu_size, 512);
542 if (tr_length > 0) {
543 data = kmalloc(tr_length, M_DEVBUF, M_WAITOK);
544 error = copyin(tu->tu_data, data, tu->tu_size);
545 if (error) {
546 kfree(data, M_DEVBUF);
547 break;
548 }
549 } else
550 data = NULL;
551
552 /* get a request */
553 TWE_IO_LOCK(sc);
554 while (twe_get_request(sc, &tr))
555 lksleep(sc, &sc->twe_io_lock, 0, "twioctl", hz);
556
557 /*
558 * Save the command's request ID, copy the user-supplied command in,
559 * restore the request ID.
560 */
561 cmd = TWE_FIND_COMMAND(tr);
562 srid = cmd->generic.request_id;
563 bcopy(&tu->tu_command, cmd, sizeof(TWE_Command));
564 cmd->generic.request_id = srid;
565
566 /*
567 * if there's a data buffer, allocate and copy it in.
568 * Must be in multipled of 512 bytes.
569 */
570 tr->tr_length = tr_length;
571 tr->tr_data = data;
572 if (tr->tr_length > 0)
573 tr->tr_flags |= TWE_CMD_DATAIN | TWE_CMD_DATAOUT;
574
575 /* run the command */
576 error = twe_wait_request(tr);
577 TWE_IO_UNLOCK(sc);
578 if (error)
579 goto cmd_done;
580
581 /* copy the command out again */
582 bcopy(cmd, &tu->tu_command, sizeof(TWE_Command));
583
584 /* if there was a data buffer, copy it out */
585 if (tr->tr_length > 0)
586 error = copyout(tr->tr_data, tu->tu_data, tu->tu_size);
587
588 cmd_done:
589 /* free resources */
590 if (tr->tr_data != NULL)
591 kfree(tr->tr_data, M_DEVBUF);
592 TWE_IO_LOCK(sc);
593 twe_release_request(tr);
594 TWE_IO_UNLOCK(sc);
595
596 break;
597
598 /* fetch statistics counter */
599 case TWEIO_STATS:
600 switch (ts->ts_item) {
601 #ifdef TWE_PERFORMANCE_MONITOR
602 case TWEQ_FREE:
603 case TWEQ_BIO:
604 case TWEQ_READY:
605 case TWEQ_BUSY:
606 case TWEQ_COMPLETE:
607 TWE_IO_LOCK(sc);
608 bcopy(&sc->twe_qstat[ts->ts_item], &ts->ts_qstat, sizeof(struct twe_qstat));
609 TWE_IO_UNLOCK(sc);
610 break;
611 #endif
612 default:
613 error = ENOENT;
614 break;
615 }
616 break;
617
618 /* poll for an AEN */
619 case TWEIO_AEN_POLL:
620 TWE_IO_LOCK(sc);
621 *aen_code = twe_dequeue_aen(sc);
622 TWE_IO_UNLOCK(sc);
623 break;
624
625 /* wait for another AEN to show up */
626 case TWEIO_AEN_WAIT:
627 TWE_IO_LOCK(sc);
628 while ((*aen_code = twe_dequeue_aen(sc)) == TWE_AEN_QUEUE_EMPTY) {
629 error = lksleep(&sc->twe_aen_queue, &sc->twe_io_lock, PCATCH,
630 "tweaen", 0);
631 if (error == EINTR)
632 break;
633 }
634 TWE_IO_UNLOCK(sc);
635 break;
636
637 case TWEIO_GET_PARAM:
638 TWE_IO_LOCK(sc);
639 param = twe_get_param(sc, tp->tp_table_id, tp->tp_param_id, tp->tp_size, NULL);
640 TWE_IO_UNLOCK(sc);
641 if (param == NULL) {
642 twe_printf(sc, "TWEIO_GET_PARAM failed for 0x%x/0x%x/%d\n",
643 tp->tp_table_id, tp->tp_param_id, tp->tp_size);
644 error = EINVAL;
645 } else {
646 if (param->parameter_size_bytes > tp->tp_size) {
647 twe_printf(sc, "TWEIO_GET_PARAM parameter too large (%d > %d)\n",
648 param->parameter_size_bytes, tp->tp_size);
649 error = EFAULT;
650 } else {
651 error = copyout(param->data, tp->tp_data, param->parameter_size_bytes);
652 }
653 kfree(param, M_DEVBUF);
654 }
655 break;
656
657 case TWEIO_SET_PARAM:
658 data = kmalloc(tp->tp_size, M_DEVBUF, M_WAITOK);
659 error = copyin(tp->tp_data, data, tp->tp_size);
660 if (error == 0) {
661 TWE_IO_LOCK(sc);
662 error = twe_set_param(sc, tp->tp_table_id, tp->tp_param_id, tp->tp_size, data);
663 TWE_IO_UNLOCK(sc);
664 }
665 kfree(data, M_DEVBUF);
666 break;
667
668 case TWEIO_RESET:
669 TWE_IO_LOCK(sc);
670 twe_reset(sc);
671 TWE_IO_UNLOCK(sc);
672 break;
673
674 case TWEIO_ADD_UNIT:
675 TWE_CONFIG_LOCK(sc);
676 error = twe_add_unit(sc, td->td_unit);
677 TWE_CONFIG_UNLOCK(sc);
678 break;
679
680 case TWEIO_DEL_UNIT:
681 TWE_CONFIG_LOCK(sc);
682 error = twe_del_unit(sc, td->td_unit);
683 TWE_CONFIG_UNLOCK(sc);
684 break;
685
686 /* XXX implement ATA PASSTHROUGH */
687
688 /* nothing we understand */
689 default:
690 error = ENOTTY;
691 }
692
693 return(error);
694 }
695
696 /********************************************************************************
697 * Enable the useful interrupts from the controller.
698 */
699 void
twe_enable_interrupts(struct twe_softc * sc)700 twe_enable_interrupts(struct twe_softc *sc)
701 {
702 sc->twe_state |= TWE_STATE_INTEN;
703 TWE_CONTROL(sc,
704 TWE_CONTROL_CLEAR_ATTENTION_INTERRUPT |
705 TWE_CONTROL_UNMASK_RESPONSE_INTERRUPT |
706 TWE_CONTROL_ENABLE_INTERRUPTS);
707 }
708
709 /********************************************************************************
710 * Disable interrupts from the controller.
711 */
712 void
twe_disable_interrupts(struct twe_softc * sc)713 twe_disable_interrupts(struct twe_softc *sc)
714 {
715 TWE_CONTROL(sc, TWE_CONTROL_DISABLE_INTERRUPTS);
716 sc->twe_state &= ~TWE_STATE_INTEN;
717 }
718
719 /********************************************************************************
720 ********************************************************************************
721 Command Submission
722 ********************************************************************************
723 ********************************************************************************/
724
725 /********************************************************************************
726 * Read integer parameter table entries.
727 */
728 static int
twe_get_param_1(struct twe_softc * sc,int table_id,int param_id,u_int8_t * result)729 twe_get_param_1(struct twe_softc *sc, int table_id, int param_id, u_int8_t *result)
730 {
731 TWE_Param *param;
732
733 if ((param = twe_get_param(sc, table_id, param_id, 1, NULL)) == NULL)
734 return(ENOENT);
735 *result = *(u_int8_t *)param->data;
736 kfree(param, M_DEVBUF);
737 return(0);
738 }
739
740 static int
twe_get_param_2(struct twe_softc * sc,int table_id,int param_id,u_int16_t * result)741 twe_get_param_2(struct twe_softc *sc, int table_id, int param_id, u_int16_t *result)
742 {
743 TWE_Param *param;
744
745 if ((param = twe_get_param(sc, table_id, param_id, 2, NULL)) == NULL)
746 return(ENOENT);
747 *result = *(u_int16_t *)param->data;
748 kfree(param, M_DEVBUF);
749 return(0);
750 }
751
752 static int
twe_get_param_4(struct twe_softc * sc,int table_id,int param_id,u_int32_t * result)753 twe_get_param_4(struct twe_softc *sc, int table_id, int param_id, u_int32_t *result)
754 {
755 TWE_Param *param;
756
757 if ((param = twe_get_param(sc, table_id, param_id, 4, NULL)) == NULL)
758 return(ENOENT);
759 *result = *(u_int32_t *)param->data;
760 kfree(param, M_DEVBUF);
761 return(0);
762 }
763
764 /********************************************************************************
765 * Perform a TWE_OP_GET_PARAM command. If a callback function is provided, it
766 * will be called with the command when it's completed. If no callback is
767 * provided, we will wait for the command to complete and then return just the data.
768 * The caller is responsible for freeing the data when done with it.
769 */
770 static void *
twe_get_param(struct twe_softc * sc,int table_id,int param_id,size_t param_size,void (* func)(struct twe_request * tr))771 twe_get_param(struct twe_softc *sc, int table_id, int param_id, size_t param_size,
772 void (* func)(struct twe_request *tr))
773 {
774 struct twe_request *tr;
775 TWE_Command *cmd;
776 TWE_Param *param;
777 int error;
778
779 debug_called(4);
780
781 twe_lockassert(&sc->twe_io_lock);
782 tr = NULL;
783 param = NULL;
784
785 /* get a command */
786 if (twe_get_request(sc, &tr))
787 goto err;
788
789 /* get a buffer */
790 param = (TWE_Param *)kmalloc(TWE_SECTOR_SIZE, M_DEVBUF, M_INTWAIT);
791 tr->tr_data = param;
792 tr->tr_length = TWE_SECTOR_SIZE;
793 tr->tr_flags = TWE_CMD_DATAIN | TWE_CMD_DATAOUT;
794
795 /* build the command for the controller */
796 cmd = TWE_FIND_COMMAND(tr);
797 cmd->param.opcode = TWE_OP_GET_PARAM;
798 cmd->param.size = 2;
799 cmd->param.unit = 0;
800 cmd->param.param_count = 1;
801
802 /* fill in the outbound parameter data */
803 param->table_id = table_id;
804 param->parameter_id = param_id;
805 param->parameter_size_bytes = param_size;
806
807 /* submit the command and either wait or let the callback handle it */
808 if (func == NULL) {
809 /* XXX could use twe_wait_request here if interrupts were enabled? */
810 error = twe_immediate_request(tr, 1 /* usetmp */);
811 if (error == 0) {
812 if (twe_report_request(tr))
813 goto err;
814 } else {
815 goto err;
816 }
817 twe_release_request(tr);
818 return(param);
819 } else {
820 tr->tr_complete = func;
821 error = twe_map_request(tr);
822 if ((error == 0) || (error == EBUSY))
823 return(func);
824 }
825
826 /* something failed */
827 err:
828 debug(1, "failed");
829 if (tr != NULL)
830 twe_release_request(tr);
831 if (param != NULL)
832 kfree(param, M_DEVBUF);
833 return(NULL);
834 }
835
836 /********************************************************************************
837 * Set integer parameter table entries.
838 */
839 #ifdef TWE_SHUTDOWN_NOTIFICATION
840 static int
twe_set_param_1(struct twe_softc * sc,int table_id,int param_id,u_int8_t value)841 twe_set_param_1(struct twe_softc *sc, int table_id, int param_id, u_int8_t value)
842 {
843 return(twe_set_param(sc, table_id, param_id, sizeof(value), &value));
844 }
845 #endif
846
847 #if 0
848 static int
849 twe_set_param_2(struct twe_softc *sc, int table_id, int param_id, u_int16_t value)
850 {
851 return(twe_set_param(sc, table_id, param_id, sizeof(value), &value));
852 }
853
854 static int
855 twe_set_param_4(struct twe_softc *sc, int table_id, int param_id, u_int32_t value)
856 {
857 return(twe_set_param(sc, table_id, param_id, sizeof(value), &value));
858 }
859 #endif
860
861 /********************************************************************************
862 * Perform a TWE_OP_SET_PARAM command, returns nonzero on error.
863 */
864 static int
twe_set_param(struct twe_softc * sc,int table_id,int param_id,int param_size,void * data)865 twe_set_param(struct twe_softc *sc, int table_id, int param_id, int param_size, void *data)
866 {
867 struct twe_request *tr;
868 TWE_Command *cmd;
869 TWE_Param *param;
870 int error;
871
872 debug_called(4);
873
874 twe_lockassert(&sc->twe_io_lock);
875 tr = NULL;
876 param = NULL;
877 error = ENOMEM;
878
879 /* get a command */
880 if (twe_get_request(sc, &tr))
881 goto out;
882
883 /* get a buffer */
884 param = (TWE_Param *)kmalloc(TWE_SECTOR_SIZE, M_DEVBUF, M_INTWAIT);
885 tr->tr_data = param;
886 tr->tr_length = TWE_SECTOR_SIZE;
887 tr->tr_flags = TWE_CMD_DATAIN | TWE_CMD_DATAOUT;
888
889 /* build the command for the controller */
890 cmd = TWE_FIND_COMMAND(tr);
891 cmd->param.opcode = TWE_OP_SET_PARAM;
892 cmd->param.size = 2;
893 cmd->param.unit = 0;
894 cmd->param.param_count = 1;
895
896 /* fill in the outbound parameter data */
897 param->table_id = table_id;
898 param->parameter_id = param_id;
899 param->parameter_size_bytes = param_size;
900 bcopy(data, param->data, param_size);
901
902 /* XXX could use twe_wait_request here if interrupts were enabled? */
903 error = twe_immediate_request(tr, 1 /* usetmp */);
904 if (error == 0) {
905 if (twe_report_request(tr))
906 error = EIO;
907 }
908
909 out:
910 if (tr != NULL)
911 twe_release_request(tr);
912 if (param != NULL)
913 kfree(param, M_DEVBUF);
914 return(error);
915 }
916
917 /********************************************************************************
918 * Perform a TWE_OP_INIT_CONNECTION command, returns nonzero on error.
919 *
920 * Typically called with interrupts disabled.
921 */
922 static int
twe_init_connection(struct twe_softc * sc,int mode)923 twe_init_connection(struct twe_softc *sc, int mode)
924 {
925 struct twe_request *tr;
926 TWE_Command *cmd;
927 int error;
928
929 debug_called(4);
930
931 twe_lockassert(&sc->twe_io_lock);
932
933 /* get a command */
934 if (twe_get_request(sc, &tr))
935 return(0);
936
937 /* build the command */
938 cmd = TWE_FIND_COMMAND(tr);
939 cmd->initconnection.opcode = TWE_OP_INIT_CONNECTION;
940 cmd->initconnection.size = 3;
941 cmd->initconnection.host_id = 0;
942 cmd->initconnection.message_credits = mode;
943 cmd->initconnection.response_queue_pointer = 0;
944
945 /* submit the command */
946 error = twe_immediate_request(tr, 0 /* usetmp */);
947 twe_release_request(tr);
948
949 if (mode == TWE_INIT_MESSAGE_CREDITS)
950 sc->twe_host_id = cmd->initconnection.host_id;
951 return(error);
952 }
953
954 /********************************************************************************
955 * Start the command (tr) and sleep waiting for it to complete.
956 *
957 * Successfully completed commands are dequeued.
958 */
959 static int
twe_wait_request(struct twe_request * tr)960 twe_wait_request(struct twe_request *tr)
961 {
962 debug_called(4);
963
964 twe_lockassert(&tr->tr_sc->twe_io_lock);
965 tr->tr_flags |= TWE_CMD_SLEEPER;
966 tr->tr_status = TWE_CMD_BUSY;
967 twe_enqueue_ready(tr);
968 twe_startio(tr->tr_sc);
969 while (tr->tr_status == TWE_CMD_BUSY)
970 lksleep(tr, &tr->tr_sc->twe_io_lock, 0, "twewait", 0);
971
972 return(tr->tr_status != TWE_CMD_COMPLETE);
973 }
974
975 /********************************************************************************
976 * Start the command (tr) and busy-wait for it to complete.
977 * This should only be used when interrupts are actually disabled (although it
978 * will work if they are not).
979 */
980 static int
twe_immediate_request(struct twe_request * tr,int usetmp)981 twe_immediate_request(struct twe_request *tr, int usetmp)
982 {
983 struct twe_softc *sc;
984 int error;
985 int count = 0;
986
987 debug_called(4);
988
989 sc = tr->tr_sc;
990
991 if (usetmp && (tr->tr_data != NULL)) {
992 tr->tr_flags |= TWE_CMD_IMMEDIATE;
993 if (tr->tr_length > MAXBSIZE)
994 return (EINVAL);
995 bcopy(tr->tr_data, sc->twe_immediate, tr->tr_length);
996 }
997 tr->tr_status = TWE_CMD_BUSY;
998 if ((error = twe_map_request(tr)) != 0)
999 if (error != EBUSY)
1000 return(error);
1001
1002 /* Wait up to 5 seconds for the command to complete */
1003 while ((count++ < 5000) && (tr->tr_status == TWE_CMD_BUSY)){
1004 DELAY(1000);
1005 twe_done(sc, 1);
1006 }
1007 if (usetmp && (tr->tr_data != NULL))
1008 bcopy(sc->twe_immediate, tr->tr_data, tr->tr_length);
1009
1010 return(tr->tr_status != TWE_CMD_COMPLETE);
1011 }
1012
1013 /********************************************************************************
1014 * Handle completion of an I/O command.
1015 */
1016 static void
twe_completeio(struct twe_request * tr)1017 twe_completeio(struct twe_request *tr)
1018 {
1019 TWE_Command *cmd = TWE_FIND_COMMAND(tr);
1020 struct twe_softc *sc = tr->tr_sc;
1021 struct bio *bio = tr->tr_private;
1022 struct buf *bp = bio->bio_buf;
1023
1024 debug_called(4);
1025
1026 if (tr->tr_status == TWE_CMD_COMPLETE) {
1027
1028 if (cmd->generic.status)
1029 if (twe_report_request(tr)) {
1030 bp->b_error = EIO;
1031 bp->b_flags |= B_ERROR;
1032 }
1033
1034 } else {
1035 twe_panic(sc, "twe_completeio on incomplete command");
1036 }
1037 tr->tr_private = NULL;
1038 twed_intr(bio);
1039 twe_release_request(tr);
1040 }
1041
1042 /********************************************************************************
1043 * Reset the controller and pull all the active commands back onto the ready
1044 * queue. Used to restart a controller that's exhibiting bad behaviour.
1045 */
1046 static void
twe_reset(struct twe_softc * sc)1047 twe_reset(struct twe_softc *sc)
1048 {
1049 struct twe_request *tr;
1050 int i;
1051
1052 /*
1053 * Sleep for a short period to allow AENs to be signalled.
1054 */
1055 lksleep(sc, &sc->twe_io_lock, 0, "twereset", hz);
1056
1057 /*
1058 * Disable interrupts from the controller, and mask any accidental entry
1059 * into our interrupt handler.
1060 */
1061 twe_printf(sc, "controller reset in progress...\n");
1062 twe_disable_interrupts(sc);
1063
1064 /*
1065 * Try to soft-reset the controller.
1066 */
1067 for (i = 0; i < TWE_MAX_RESET_TRIES; i++) {
1068
1069 if (i > 0)
1070 twe_printf(sc, "reset %d failed, trying again\n", i);
1071
1072 if (!twe_soft_reset(sc))
1073 break; /* reset process complete */
1074 }
1075 /* did we give up? */
1076 if (i >= TWE_MAX_RESET_TRIES) {
1077 twe_printf(sc, "can't reset controller, giving up\n");
1078 goto out;
1079 }
1080
1081 /*
1082 * Move all of the commands that were busy back to the ready queue.
1083 */
1084 i = 0;
1085 while ((tr = twe_dequeue_busy(sc)) != NULL) {
1086 twe_enqueue_ready(tr);
1087 i++;
1088 }
1089
1090 /*
1091 * Kick the controller to start things going again, then re-enable interrupts.
1092 */
1093 twe_startio(sc);
1094 twe_printf(sc, "controller reset done, %d commands restarted\n", i);
1095
1096 out:
1097 twe_enable_interrupts(sc);
1098 }
1099
1100 /********************************************************************************
1101 ********************************************************************************
1102 Command I/O to Controller
1103 ********************************************************************************
1104 ********************************************************************************/
1105
1106 /********************************************************************************
1107 * Try to deliver (tr) to the controller.
1108 *
1109 * Can be called at any interrupt level, with or without interrupts enabled.
1110 */
1111 int
twe_start(struct twe_request * tr)1112 twe_start(struct twe_request *tr)
1113 {
1114 struct twe_softc *sc = tr->tr_sc;
1115 #ifdef TWE_DEBUG
1116 TWE_Command *cmd;
1117 #endif
1118 int i;
1119 u_int32_t status_reg;
1120
1121 debug_called(4);
1122
1123 twe_lockassert(&sc->twe_io_lock);
1124
1125 /* mark the command as currently being processed */
1126 tr->tr_status = TWE_CMD_BUSY;
1127 #ifdef TWE_DEBUG
1128 cmd = TWE_FIND_COMMAND(tr);
1129 #endif
1130
1131 /*
1132 * Spin briefly waiting for the controller to come ready
1133 *
1134 * XXX it might be more efficient to return EBUSY immediately
1135 * and let the command be rescheduled.
1136 */
1137 for (i = 100000; (i > 0); i--) {
1138
1139 /* check to see if we can post a command */
1140 status_reg = TWE_STATUS(sc);
1141 twe_check_bits(sc, status_reg);
1142
1143 if (!(status_reg & TWE_STATUS_COMMAND_QUEUE_FULL)) {
1144 twe_enqueue_busy(tr);
1145
1146 TWE_COMMAND_QUEUE(sc, TWE_FIND_COMMANDPHYS(tr));
1147
1148 /* move command to work queue */
1149 #ifdef TWE_DEBUG
1150 if (tr->tr_complete != NULL) {
1151 debug(3, "queued request %d with callback %p", cmd->generic.request_id, tr->tr_complete);
1152 } else if (tr->tr_flags & TWE_CMD_SLEEPER) {
1153 debug(3, "queued request %d with wait channel %p", cmd->generic.request_id, tr);
1154 } else {
1155 debug(3, "queued request %d for polling caller", cmd->generic.request_id);
1156 }
1157 #endif
1158 return(0);
1159 } else if (!(status_reg & TWE_STATUS_RESPONSE_QUEUE_EMPTY) && i > 1)
1160 twe_done(sc, 0);
1161 }
1162
1163 /*
1164 * We couldn't get the controller to take the command; try submitting it again later.
1165 * This should only happen if something is wrong with the controller, or if we have
1166 * overestimated the number of commands it can accept. (Should we actually reject
1167 * the command at this point?)
1168 */
1169 return(EBUSY);
1170 }
1171
1172 /********************************************************************************
1173 * Poll the controller (sc) for completed commands.
1174 *
1175 * Can be called at any interrupt level, with or without interrupts enabled.
1176 */
1177 static void
twe_done(struct twe_softc * sc,int startio)1178 twe_done(struct twe_softc *sc, int startio)
1179 {
1180 TWE_Response_Queue rq;
1181 #ifdef TWE_DEBUG
1182 TWE_Command *cmd;
1183 #endif
1184 struct twe_request *tr;
1185 int found;
1186 u_int32_t status_reg;
1187
1188 debug_called(5);
1189
1190 /* loop collecting completed commands */
1191 found = 0;
1192 for (;;) {
1193 status_reg = TWE_STATUS(sc);
1194 twe_check_bits(sc, status_reg); /* XXX should this fail? */
1195
1196 if (!(status_reg & TWE_STATUS_RESPONSE_QUEUE_EMPTY)) {
1197 found = 1;
1198 rq.value = TWE_RESPONSE_QUEUE(sc);
1199 tr = sc->twe_lookup[rq.u.response_id]; /* find command */
1200 #ifdef TWE_DEBUG
1201 cmd = TWE_FIND_COMMAND(tr);
1202 #endif
1203 if (tr->tr_status != TWE_CMD_BUSY)
1204 twe_printf(sc, "completion event for nonbusy command\n");
1205 tr->tr_status = TWE_CMD_COMPLETE;
1206 debug(3, "completed request id %d with status %d",
1207 cmd->generic.request_id, cmd->generic.status);
1208 /* move to completed queue */
1209 twe_remove_busy(tr);
1210 twe_enqueue_complete(tr);
1211 sc->twe_state &= ~TWE_STATE_CTLR_BUSY;
1212 } else {
1213 break; /* no response ready */
1214 }
1215 }
1216
1217 /* if we've completed any commands, try posting some more */
1218 if (found && startio)
1219 twe_startio(sc);
1220
1221 /* handle completion and timeouts */
1222 twe_complete(sc); /* XXX use deferred completion? */
1223 }
1224
1225 /********************************************************************************
1226 * Perform post-completion processing for commands on (sc).
1227 *
1228 * This is split from twe_done as it can be safely deferred and run at a lower
1229 * priority level should facilities for such a thing become available.
1230 */
1231 static void
twe_complete(struct twe_softc * sc)1232 twe_complete(struct twe_softc *sc)
1233 {
1234 struct twe_request *tr;
1235
1236 debug_called(5);
1237
1238 /*
1239 * Pull commands off the completed list, dispatch them appropriately
1240 */
1241 while ((tr = twe_dequeue_complete(sc)) != NULL) {
1242 /* unmap the command's data buffer */
1243 twe_unmap_request(tr);
1244
1245 /* dispatch to suit command originator */
1246 if (tr->tr_complete != NULL) { /* completion callback */
1247 debug(2, "call completion handler %p", tr->tr_complete);
1248 tr->tr_complete(tr);
1249
1250 } else if (tr->tr_flags & TWE_CMD_SLEEPER) { /* caller is asleep waiting */
1251 debug(2, "wake up command owner on %p", tr);
1252 wakeup_one(tr);
1253
1254 } else { /* caller is polling command */
1255 debug(2, "command left for owner");
1256 }
1257 }
1258 }
1259
1260 /********************************************************************************
1261 * Wait for (status) to be set in the controller status register for up to
1262 * (timeout) seconds. Returns 0 if found, nonzero if we time out.
1263 *
1264 * Note: this busy-waits, rather than sleeping, since we may be called with
1265 * eg. clock interrupts masked.
1266 */
1267 static int
twe_wait_status(struct twe_softc * sc,u_int32_t status,int timeout)1268 twe_wait_status(struct twe_softc *sc, u_int32_t status, int timeout)
1269 {
1270 time_t expiry;
1271 u_int32_t status_reg;
1272
1273 debug_called(4);
1274
1275 expiry = time_uptime + timeout;
1276
1277 do {
1278 status_reg = TWE_STATUS(sc);
1279 if (status_reg & status) /* got the required bit(s)? */
1280 return(0);
1281 DELAY(100000);
1282 } while (time_uptime <= expiry);
1283
1284 return(1);
1285 }
1286
1287 /********************************************************************************
1288 * Drain the response queue, which may contain responses to commands we know
1289 * nothing about.
1290 */
1291 static int
twe_drain_response_queue(struct twe_softc * sc)1292 twe_drain_response_queue(struct twe_softc *sc)
1293 {
1294 TWE_Response_Queue rq;
1295 u_int32_t status_reg;
1296
1297 debug_called(4);
1298
1299 for (;;) { /* XXX give up eventually? */
1300 status_reg = TWE_STATUS(sc);
1301 if (twe_check_bits(sc, status_reg))
1302 return(1);
1303 if (status_reg & TWE_STATUS_RESPONSE_QUEUE_EMPTY)
1304 return(0);
1305 rq.value = TWE_RESPONSE_QUEUE(sc);
1306 }
1307 }
1308
1309 /********************************************************************************
1310 * Soft-reset the controller
1311 */
1312 static int
twe_soft_reset(struct twe_softc * sc)1313 twe_soft_reset(struct twe_softc *sc)
1314 {
1315 u_int32_t status_reg;
1316
1317 debug_called(2);
1318
1319 twe_lockassert(&sc->twe_io_lock);
1320 TWE_SOFT_RESET(sc);
1321
1322 if (twe_wait_status(sc, TWE_STATUS_ATTENTION_INTERRUPT, 30)) {
1323 twe_printf(sc, "no attention interrupt\n");
1324 return(1);
1325 }
1326 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_ATTENTION_INTERRUPT);
1327 if (twe_drain_aen_queue(sc)) {
1328 twe_printf(sc, "can't drain AEN queue\n");
1329 return(1);
1330 }
1331 if (twe_find_aen(sc, TWE_AEN_SOFT_RESET)) {
1332 twe_printf(sc, "reset not reported\n");
1333 return(1);
1334 }
1335 status_reg = TWE_STATUS(sc);
1336 if (TWE_STATUS_ERRORS(status_reg) || twe_check_bits(sc, status_reg)) {
1337 twe_printf(sc, "controller errors detected\n");
1338 return(1);
1339 }
1340 if (twe_drain_response_queue(sc)) {
1341 twe_printf(sc, "can't drain response queue\n");
1342 return(1);
1343 }
1344 return(0);
1345 }
1346
1347 /********************************************************************************
1348 ********************************************************************************
1349 Interrupt Handling
1350 ********************************************************************************
1351 ********************************************************************************/
1352
1353 /********************************************************************************
1354 * Host interrupt.
1355 *
1356 * XXX what does this mean?
1357 */
1358 static void
twe_host_intr(struct twe_softc * sc)1359 twe_host_intr(struct twe_softc *sc)
1360 {
1361 debug_called(4);
1362
1363 twe_printf(sc, "host interrupt\n");
1364 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_HOST_INTERRUPT);
1365 }
1366
1367 /********************************************************************************
1368 * Attention interrupt.
1369 *
1370 * Signalled when the controller has one or more AENs for us.
1371 */
1372 static void
twe_attention_intr(struct twe_softc * sc)1373 twe_attention_intr(struct twe_softc *sc)
1374 {
1375 debug_called(4);
1376
1377 /* instigate a poll for AENs */
1378 if (twe_fetch_aen(sc)) {
1379 twe_printf(sc, "error polling for signalled AEN\n");
1380 } else {
1381 TWE_CONTROL(sc, TWE_CONTROL_CLEAR_ATTENTION_INTERRUPT);
1382 }
1383 }
1384
1385 /********************************************************************************
1386 * Command interrupt.
1387 *
1388 * Signalled when the controller can handle more commands.
1389 */
1390 static void
twe_command_intr(struct twe_softc * sc)1391 twe_command_intr(struct twe_softc *sc)
1392 {
1393 debug_called(4);
1394
1395 /*
1396 * We don't use this, rather we try to submit commands when we receive
1397 * them, and when other commands have completed. Mask it so we don't get
1398 * another one.
1399 */
1400 TWE_CONTROL(sc, TWE_CONTROL_MASK_COMMAND_INTERRUPT);
1401 }
1402
1403 /********************************************************************************
1404 ********************************************************************************
1405 Asynchronous Event Handling
1406 ********************************************************************************
1407 ********************************************************************************/
1408
1409 /********************************************************************************
1410 * Request an AEN from the controller.
1411 */
1412 static int
twe_fetch_aen(struct twe_softc * sc)1413 twe_fetch_aen(struct twe_softc *sc)
1414 {
1415
1416 debug_called(4);
1417
1418 if ((twe_get_param(sc, TWE_PARAM_AEN, TWE_PARAM_AEN_UnitCode, 2, twe_handle_aen)) == NULL)
1419 return(EIO);
1420 return(0);
1421 }
1422
1423 /********************************************************************************
1424 * Handle an AEN returned by the controller.
1425 */
1426 static void
twe_handle_aen(struct twe_request * tr)1427 twe_handle_aen(struct twe_request *tr)
1428 {
1429 struct twe_softc *sc = tr->tr_sc;
1430 TWE_Param *param;
1431 u_int16_t aen;
1432
1433 debug_called(4);
1434
1435 /* XXX check for command success somehow? */
1436
1437 param = (TWE_Param *)tr->tr_data;
1438 aen = *(u_int16_t *)(param->data);
1439
1440 kfree(tr->tr_data, M_DEVBUF);
1441 twe_release_request(tr);
1442 twe_enqueue_aen(sc, aen);
1443
1444 /* XXX poll for more AENs? */
1445 }
1446
1447 /********************************************************************************
1448 * Pull AENs out of the controller and park them in the queue, in a context where
1449 * interrupts aren't active. Return nonzero if we encounter any errors in the
1450 * process of obtaining all the available AENs.
1451 */
1452 static int
twe_drain_aen_queue(struct twe_softc * sc)1453 twe_drain_aen_queue(struct twe_softc *sc)
1454 {
1455 u_int16_t aen;
1456
1457 twe_lockassert(&sc->twe_io_lock);
1458 for (;;) {
1459 if (twe_get_param_2(sc, TWE_PARAM_AEN, TWE_PARAM_AEN_UnitCode, &aen))
1460 return(1);
1461 if (aen == TWE_AEN_QUEUE_EMPTY)
1462 return(0);
1463 twe_enqueue_aen(sc, aen);
1464 }
1465 }
1466
1467 /********************************************************************************
1468 * Push an AEN that we've received onto the queue.
1469 *
1470 * Note that we have to lock this against reentrance, since it may be called
1471 * from both interrupt and non-interrupt context.
1472 *
1473 * If someone is waiting for the AEN we have, wake them up.
1474 */
1475 static void
twe_enqueue_aen(struct twe_softc * sc,u_int16_t aen)1476 twe_enqueue_aen(struct twe_softc *sc, u_int16_t aen)
1477 {
1478 char *msg;
1479 int next, nextnext;
1480
1481 debug_called(4);
1482
1483 twe_lockassert(&sc->twe_io_lock);
1484 if ((msg = twe_format_aen(sc, aen)) != NULL)
1485 twe_printf(sc, "AEN: <%s>\n", msg);
1486
1487 /* enqueue the AEN */
1488 next = ((sc->twe_aen_head + 1) % TWE_Q_LENGTH);
1489 nextnext = ((sc->twe_aen_head + 2) % TWE_Q_LENGTH);
1490
1491 /* check to see if this is the last free slot, and subvert the AEN if it is */
1492 if (nextnext == sc->twe_aen_tail)
1493 aen = TWE_AEN_QUEUE_FULL;
1494
1495 /* look to see if there's room for this AEN */
1496 if (next != sc->twe_aen_tail) {
1497 sc->twe_aen_queue[sc->twe_aen_head] = aen;
1498 sc->twe_aen_head = next;
1499 }
1500
1501 /* wake up anyone asleep on the queue */
1502 wakeup(&sc->twe_aen_queue);
1503
1504 /* anyone looking for this AEN? */
1505 if (sc->twe_wait_aen == aen) {
1506 sc->twe_wait_aen = -1;
1507 wakeup(&sc->twe_wait_aen);
1508 }
1509 }
1510
1511 /********************************************************************************
1512 * Pop an AEN off the queue, or return -1 if there are none left.
1513 *
1514 * We are more or less interrupt-safe, so don't block interrupts.
1515 */
1516 static u_int16_t
twe_dequeue_aen(struct twe_softc * sc)1517 twe_dequeue_aen(struct twe_softc *sc)
1518 {
1519 u_int16_t result;
1520
1521 debug_called(4);
1522
1523 twe_lockassert(&sc->twe_io_lock);
1524 if (sc->twe_aen_tail == sc->twe_aen_head) {
1525 result = TWE_AEN_QUEUE_EMPTY;
1526 } else {
1527 result = sc->twe_aen_queue[sc->twe_aen_tail];
1528 sc->twe_aen_tail = ((sc->twe_aen_tail + 1) % TWE_Q_LENGTH);
1529 }
1530 return(result);
1531 }
1532
1533 /********************************************************************************
1534 * Check to see if the requested AEN is in the queue.
1535 *
1536 * XXX we could probably avoid masking interrupts here
1537 */
1538 static int
twe_find_aen(struct twe_softc * sc,u_int16_t aen)1539 twe_find_aen(struct twe_softc *sc, u_int16_t aen)
1540 {
1541 int i, missing;
1542
1543 missing = 1;
1544 for (i = sc->twe_aen_tail; (i != sc->twe_aen_head) && missing; i = (i + 1) % TWE_Q_LENGTH) {
1545 if (sc->twe_aen_queue[i] == aen)
1546 missing = 0;
1547 }
1548 return(missing);
1549 }
1550
1551
1552 #if 0 /* currently unused */
1553 /********************************************************************************
1554 * Sleep waiting for at least (timeout) seconds until we see (aen) as
1555 * requested. Returns nonzero on timeout or failure.
1556 *
1557 * XXX: this should not be used in cases where there may be more than one sleeper
1558 * without a mechanism for registering multiple sleepers.
1559 */
1560 static int
1561 twe_wait_aen(struct twe_softc *sc, int aen, int timeout)
1562 {
1563 time_t expiry;
1564 int found;
1565
1566 debug_called(4);
1567
1568 expiry = time_uptime + timeout;
1569 found = 0;
1570
1571 sc->twe_wait_aen = aen;
1572 do {
1573 twe_fetch_aen(sc);
1574 lksleep(&sc->twe_wait_aen, &sc->twe_io_lock, 0, "twewaen", hz);
1575 if (sc->twe_wait_aen == -1)
1576 found = 1;
1577 } while ((time_uptime <= expiry) && !found);
1578 return(!found);
1579 }
1580 #endif
1581
1582 /********************************************************************************
1583 ********************************************************************************
1584 Command Buffer Management
1585 ********************************************************************************
1586 ********************************************************************************/
1587
1588 /********************************************************************************
1589 * Get a new command buffer.
1590 *
1591 * This will return NULL if all command buffers are in use.
1592 */
1593 static int
twe_get_request(struct twe_softc * sc,struct twe_request ** tr)1594 twe_get_request(struct twe_softc *sc, struct twe_request **tr)
1595 {
1596 TWE_Command *cmd;
1597 debug_called(4);
1598
1599 twe_lockassert(&sc->twe_io_lock);
1600
1601 /* try to reuse an old buffer */
1602 *tr = twe_dequeue_free(sc);
1603
1604 /* initialise some fields to their defaults */
1605 if (*tr != NULL) {
1606 cmd = TWE_FIND_COMMAND(*tr);
1607 (*tr)->tr_data = NULL;
1608 (*tr)->tr_private = NULL;
1609 (*tr)->tr_status = TWE_CMD_SETUP; /* command is in setup phase */
1610 (*tr)->tr_flags = 0;
1611 (*tr)->tr_complete = NULL;
1612 cmd->generic.status = 0; /* before submission to controller */
1613 cmd->generic.flags = 0; /* not used */
1614 }
1615 return(*tr == NULL);
1616 }
1617
1618 /********************************************************************************
1619 * Release a command buffer for reuse.
1620 *
1621 */
1622 static void
twe_release_request(struct twe_request * tr)1623 twe_release_request(struct twe_request *tr)
1624 {
1625 debug_called(4);
1626
1627 twe_lockassert(&tr->tr_sc->twe_io_lock);
1628 if (tr->tr_private != NULL)
1629 twe_panic(tr->tr_sc, "tr_private != NULL");
1630 twe_enqueue_free(tr);
1631 }
1632
1633 /********************************************************************************
1634 ********************************************************************************
1635 Debugging
1636 ********************************************************************************
1637 ********************************************************************************/
1638
1639 /********************************************************************************
1640 * Print some information about the controller
1641 */
1642 void
twe_describe_controller(struct twe_softc * sc)1643 twe_describe_controller(struct twe_softc *sc)
1644 {
1645 TWE_Param *p[6];
1646 u_int8_t ports;
1647 u_int32_t size;
1648 int i, error;
1649
1650 debug_called(2);
1651
1652 TWE_IO_LOCK(sc);
1653
1654 ports = 0;
1655 size = 0;
1656 /* get the port count */
1657 error = twe_get_param_1(sc, TWE_PARAM_CONTROLLER,
1658 TWE_PARAM_CONTROLLER_PortCount, &ports);
1659
1660 /* get version strings */
1661 p[0] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_FW, 16, NULL);
1662 p[1] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_BIOS, 16, NULL);
1663 if (error == 0 && p[0] && p[1])
1664 twe_printf(sc, "%d ports, Firmware %.16s, BIOS %.16s\n", ports, p[0]->data, p[1]->data);
1665
1666 if (bootverbose) {
1667 p[2] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_Mon, 16, NULL);
1668 p[3] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_PCB, 8, NULL);
1669 p[4] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_ATA, 8, NULL);
1670 p[5] = twe_get_param(sc, TWE_PARAM_VERSION, TWE_PARAM_VERSION_PCI, 8, NULL);
1671
1672 if (p[2] && p[3] && p[4] && p[5])
1673 twe_printf(sc, "Monitor %.16s, PCB %.8s, Achip %.8s, Pchip %.8s\n", p[2]->data, p[3]->data,
1674 p[4]->data, p[5]->data);
1675 if (p[2])
1676 kfree(p[2], M_DEVBUF);
1677 if (p[3])
1678 kfree(p[3], M_DEVBUF);
1679 if (p[4])
1680 kfree(p[4], M_DEVBUF);
1681 if (p[5])
1682 kfree(p[5], M_DEVBUF);
1683 }
1684 if (p[0])
1685 kfree(p[0], M_DEVBUF);
1686 if (p[1])
1687 kfree(p[1], M_DEVBUF);
1688
1689 /* print attached drives */
1690 if (bootverbose) {
1691 p[0] = twe_get_param(sc, TWE_PARAM_DRIVESUMMARY, TWE_PARAM_DRIVESUMMARY_Status, 16, NULL);
1692 for (i = 0; i < ports; i++) {
1693 if (p[0]->data[i] != TWE_PARAM_DRIVESTATUS_Present)
1694 continue;
1695 error = twe_get_param_4(sc, TWE_PARAM_DRIVEINFO + i,
1696 TWE_PARAM_DRIVEINFO_Size, &size);
1697 p[1] = twe_get_param(sc, TWE_PARAM_DRIVEINFO + i, TWE_PARAM_DRIVEINFO_Model, 40, NULL);
1698 if (error == 0 && p[1] != NULL) {
1699 twe_printf(sc, "port %d: %.40s %dMB\n", i, p[1]->data, size / 2048);
1700 kfree(p[1], M_DEVBUF);
1701 } else {
1702 twe_printf(sc, "port %d, drive status unavailable\n", i);
1703 }
1704 }
1705 if (p[0])
1706 kfree(p[0], M_DEVBUF);
1707 }
1708 TWE_IO_UNLOCK(sc);
1709 }
1710
1711 /********************************************************************************
1712 * Look up a text description of a numeric code and return a pointer to same.
1713 */
1714 char *
twe_describe_code(struct twe_code_lookup * table,u_int32_t code)1715 twe_describe_code(struct twe_code_lookup *table, u_int32_t code)
1716 {
1717 int i;
1718
1719 for (i = 0; table[i].string != NULL; i++)
1720 if (table[i].code == code)
1721 return(table[i].string);
1722 return(table[i+1].string);
1723 }
1724
1725 /********************************************************************************
1726 * Complain if the status bits aren't what we're expecting.
1727 *
1728 * Rate-limit the complaints to at most one of each every five seconds, but
1729 * always return the correct status.
1730 */
1731 static int
twe_check_bits(struct twe_softc * sc,u_int32_t status_reg)1732 twe_check_bits(struct twe_softc *sc, u_int32_t status_reg)
1733 {
1734 int result;
1735 static time_t lastwarn[2] = {0, 0};
1736
1737 /*
1738 * This can be a little problematic, as twe_panic may call twe_reset if
1739 * TWE_DEBUG is not set, which will call us again as part of the soft reset.
1740 */
1741 if ((status_reg & TWE_STATUS_PANIC_BITS) != 0) {
1742 twe_printf(sc, "FATAL STATUS BIT(S) %pb%i\n",
1743 TWE_STATUS_BITS_DESCRIPTION,
1744 status_reg & TWE_STATUS_PANIC_BITS);
1745 twe_panic(sc, "fatal status bits");
1746 }
1747
1748 result = 0;
1749 if ((status_reg & TWE_STATUS_EXPECTED_BITS) != TWE_STATUS_EXPECTED_BITS) {
1750 if (time_uptime > (lastwarn[0] + 5)) {
1751 twe_printf(sc, "missing expected status bit(s) %pb%i\n",
1752 TWE_STATUS_BITS_DESCRIPTION,
1753 ~status_reg & TWE_STATUS_EXPECTED_BITS);
1754 lastwarn[0] = time_uptime;
1755 }
1756 result = 1;
1757 }
1758
1759 if ((status_reg & TWE_STATUS_UNEXPECTED_BITS) != 0) {
1760 if (time_uptime > (lastwarn[1] + 5)) {
1761 twe_printf(sc, "unexpected status bit(s) %pb%i\n",
1762 TWE_STATUS_BITS_DESCRIPTION,
1763 status_reg & TWE_STATUS_UNEXPECTED_BITS);
1764 lastwarn[1] = time_uptime;
1765 }
1766 result = 1;
1767 if (status_reg & TWE_STATUS_PCI_PARITY_ERROR) {
1768 twe_printf(sc, "PCI parity error: Reseat card, move card or buggy device present.\n");
1769 twe_clear_pci_parity_error(sc);
1770 }
1771 if (status_reg & TWE_STATUS_PCI_ABORT) {
1772 twe_printf(sc, "PCI abort, clearing.\n");
1773 twe_clear_pci_abort(sc);
1774 }
1775 }
1776
1777 return(result);
1778 }
1779
1780 /********************************************************************************
1781 * Return a string describing (aen).
1782 *
1783 * The low 8 bits of the aen are the code, the high 8 bits give the unit number
1784 * where an AEN is specific to a unit.
1785 *
1786 * Note that we could expand this routine to handle eg. up/downgrading the status
1787 * of a drive if we had some idea of what the drive's initial status was.
1788 */
1789
1790 static char *
twe_format_aen(struct twe_softc * sc,u_int16_t aen)1791 twe_format_aen(struct twe_softc *sc, u_int16_t aen)
1792 {
1793 device_t child;
1794 char *code, *msg;
1795
1796 code = twe_describe_code(twe_table_aen, TWE_AEN_CODE(aen));
1797 msg = code + 2;
1798
1799 switch (*code) {
1800 case 'q':
1801 if (!bootverbose)
1802 return(NULL);
1803 /* FALLTHROUGH */
1804 case 'a':
1805 return(msg);
1806
1807 case 'c':
1808 if ((child = sc->twe_drive[TWE_AEN_UNIT(aen)].td_disk) != NULL) {
1809 ksnprintf(sc->twe_aen_buf, sizeof(sc->twe_aen_buf), "twed%d: %s",
1810 device_get_unit(child), msg);
1811 } else {
1812 ksnprintf(sc->twe_aen_buf, sizeof(sc->twe_aen_buf),
1813 "twe%d: %s for unknown unit %d", device_get_unit(sc->twe_dev),
1814 msg, TWE_AEN_UNIT(aen));
1815 }
1816 return(sc->twe_aen_buf);
1817
1818 case 'p':
1819 ksnprintf(sc->twe_aen_buf, sizeof(sc->twe_aen_buf),
1820 "twe%d: port %d: %s", device_get_unit(sc->twe_dev),
1821 TWE_AEN_UNIT(aen), msg);
1822 return(sc->twe_aen_buf);
1823
1824
1825 case 'x':
1826 default:
1827 break;
1828 }
1829 ksnprintf(sc->twe_aen_buf, sizeof(sc->twe_aen_buf), "unknown AEN 0x%x", aen);
1830 return(sc->twe_aen_buf);
1831 }
1832
1833 /********************************************************************************
1834 * Print a diagnostic if the status of the command warrants it, and return
1835 * either zero (command was ok) or nonzero (command failed).
1836 */
1837 static int
twe_report_request(struct twe_request * tr)1838 twe_report_request(struct twe_request *tr)
1839 {
1840 struct twe_softc *sc = tr->tr_sc;
1841 TWE_Command *cmd = TWE_FIND_COMMAND(tr);
1842 int result = 0;
1843
1844 /*
1845 * Check the command status value and handle accordingly.
1846 */
1847 if (cmd->generic.status == TWE_STATUS_RESET) {
1848 /*
1849 * The status code 0xff requests a controller reset.
1850 */
1851 twe_printf(sc, "command returned with controller reset request\n");
1852 twe_reset(sc);
1853 result = 1;
1854 } else if (cmd->generic.status > TWE_STATUS_FATAL) {
1855 /*
1856 * Fatal errors that don't require controller reset.
1857 *
1858 * We know a few special flags values.
1859 */
1860 switch (cmd->generic.flags) {
1861 case 0x1b:
1862 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1863 "drive timeout\n");
1864 break;
1865 case 0x51:
1866 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1867 "unrecoverable drive error\n");
1868 break;
1869 default:
1870 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1871 "controller error - %s (flags = 0x%x)\n",
1872 twe_describe_code(twe_table_status, cmd->generic.status),
1873 cmd->generic.flags);
1874 result = 1;
1875 }
1876 } else if (cmd->generic.status > TWE_STATUS_WARNING) {
1877 /*
1878 * Warning level status.
1879 */
1880 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1881 "warning - %s (flags = 0x%x)\n",
1882 twe_describe_code(twe_table_status, cmd->generic.status),
1883 cmd->generic.flags);
1884 } else if (cmd->generic.status > 0x40) {
1885 /*
1886 * Info level status.
1887 */
1888 device_printf(sc->twe_drive[cmd->generic.unit].td_disk,
1889 "attention - %s (flags = 0x%x)\n",
1890 twe_describe_code(twe_table_status, cmd->generic.status),
1891 cmd->generic.flags);
1892 }
1893
1894 return(result);
1895 }
1896
1897 /********************************************************************************
1898 * Print some controller state to aid in debugging error/panic conditions
1899 */
1900 void
twe_print_controller(struct twe_softc * sc)1901 twe_print_controller(struct twe_softc *sc)
1902 {
1903 u_int32_t status_reg;
1904
1905 status_reg = TWE_STATUS(sc);
1906 twe_printf(sc, "status %pb%i\n", TWE_STATUS_BITS_DESCRIPTION, status_reg);
1907 twe_printf(sc, " current max min\n");
1908 twe_printf(sc, "free %04d %04d %04d\n",
1909 sc->twe_qstat[TWEQ_FREE].q_length, sc->twe_qstat[TWEQ_FREE].q_max, sc->twe_qstat[TWEQ_FREE].q_min);
1910
1911 twe_printf(sc, "ready %04d %04d %04d\n",
1912 sc->twe_qstat[TWEQ_READY].q_length, sc->twe_qstat[TWEQ_READY].q_max, sc->twe_qstat[TWEQ_READY].q_min);
1913
1914 twe_printf(sc, "busy %04d %04d %04d\n",
1915 sc->twe_qstat[TWEQ_BUSY].q_length, sc->twe_qstat[TWEQ_BUSY].q_max, sc->twe_qstat[TWEQ_BUSY].q_min);
1916
1917 twe_printf(sc, "complete %04d %04d %04d\n",
1918 sc->twe_qstat[TWEQ_COMPLETE].q_length, sc->twe_qstat[TWEQ_COMPLETE].q_max, sc->twe_qstat[TWEQ_COMPLETE].q_min);
1919
1920 twe_printf(sc, "bioq %04d %04d %04d\n",
1921 sc->twe_qstat[TWEQ_BIO].q_length, sc->twe_qstat[TWEQ_BIO].q_max, sc->twe_qstat[TWEQ_BIO].q_min);
1922
1923 twe_printf(sc, "AEN queue head %d tail %d\n", sc->twe_aen_head, sc->twe_aen_tail);
1924 }
1925
1926 static void
twe_panic(struct twe_softc * sc,char * reason)1927 twe_panic(struct twe_softc *sc, char *reason)
1928 {
1929 twe_print_controller(sc);
1930 #ifdef TWE_DEBUG
1931 panic(reason);
1932 #else
1933 twe_reset(sc);
1934 #endif
1935 }
1936
1937 #if 0
1938 /********************************************************************************
1939 * Print a request/command in human-readable format.
1940 */
1941 static void
1942 twe_print_request(struct twe_request *tr)
1943 {
1944 struct twe_softc *sc = tr->tr_sc;
1945 TWE_Command *cmd = TWE_FIND_COMMAND(tr);
1946 int i;
1947
1948 twe_printf(sc, "CMD: request_id %d opcode <%s> size %d unit %d host_id %d\n",
1949 cmd->generic.request_id, twe_describe_code(twe_table_opcode, cmd->generic.opcode), cmd->generic.size,
1950 cmd->generic.unit, cmd->generic.host_id);
1951 twe_printf(sc, " status %d flags 0x%x count %d sgl_offset %d\n",
1952 cmd->generic.status, cmd->generic.flags, cmd->generic.count, cmd->generic.sgl_offset);
1953
1954 switch(cmd->generic.opcode) { /* XXX add more opcodes? */
1955 case TWE_OP_READ:
1956 case TWE_OP_WRITE:
1957 twe_printf(sc, " lba %d\n", cmd->io.lba);
1958 for (i = 0; (i < TWE_MAX_SGL_LENGTH) && (cmd->io.sgl[i].length != 0); i++)
1959 twe_printf(sc, " %d: 0x%x/%d\n",
1960 i, cmd->io.sgl[i].address, cmd->io.sgl[i].length);
1961 break;
1962
1963 case TWE_OP_GET_PARAM:
1964 case TWE_OP_SET_PARAM:
1965 for (i = 0; (i < TWE_MAX_SGL_LENGTH) && (cmd->param.sgl[i].length != 0); i++)
1966 twe_printf(sc, " %d: 0x%x/%d\n",
1967 i, cmd->param.sgl[i].address, cmd->param.sgl[i].length);
1968 break;
1969
1970 case TWE_OP_INIT_CONNECTION:
1971 twe_printf(sc, " response queue pointer 0x%x\n",
1972 cmd->initconnection.response_queue_pointer);
1973 break;
1974
1975 default:
1976 break;
1977 }
1978 twe_printf(sc, " tr_command %p/0x%x tr_data %p/0x%x,%d\n",
1979 tr, TWE_FIND_COMMANDPHYS(tr), tr->tr_data, tr->tr_dataphys, tr->tr_length);
1980 twe_printf(sc, " tr_status %d tr_flags 0x%x tr_complete %p tr_private %p\n",
1981 tr->tr_status, tr->tr_flags, tr->tr_complete, tr->tr_private);
1982 }
1983
1984 #endif
1985