xref: /freebsd/sys/dev/firewire/firewire.c (revision 4ec234c813eed05c166859bba82c882e40826eb9)
1 /*-
2  * Copyright (c) 2003 Hidetoshi Shimokawa
3  * Copyright (c) 1998-2002 Katsushi Kobayashi and Hidetoshi Shimokawa
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  * 3. All advertising materials mentioning features or use of this software
15  *    must display the acknowledgement as bellow:
16  *
17  *    This product includes software developed by K. Kobayashi and H. Shimokawa
18  *
19  * 4. The name of the author may not be used to endorse or promote products
20  *    derived from this software without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
24  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
25  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
26  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
27  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
28  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
30  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
31  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32  * POSSIBILITY OF SUCH DAMAGE.
33  */
34 
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
37 
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/types.h>
41 
42 #include <sys/jail.h>
43 #include <sys/kernel.h>
44 #include <sys/module.h>
45 #include <sys/malloc.h>
46 #include <sys/conf.h>
47 #include <sys/sysctl.h>
48 #include <sys/kthread.h>
49 
50 #include <sys/kdb.h>
51 
52 #if defined(__DragonFly__) || __FreeBSD_version < 500000
53 #include <machine/clock.h>	/* for DELAY() */
54 #endif
55 
56 #include <sys/bus.h>		/* used by smbus and newbus */
57 #include <machine/bus.h>
58 
59 #ifdef __DragonFly__
60 #include "firewire.h"
61 #include "firewirereg.h"
62 #include "fwmem.h"
63 #include "iec13213.h"
64 #include "iec68113.h"
65 #else
66 #include <dev/firewire/firewire.h>
67 #include <dev/firewire/firewirereg.h>
68 #include <dev/firewire/fwmem.h>
69 #include <dev/firewire/iec13213.h>
70 #include <dev/firewire/iec68113.h>
71 #endif
72 
73 struct crom_src_buf {
74 	struct crom_src	src;
75 	struct crom_chunk root;
76 	struct crom_chunk vendor;
77 	struct crom_chunk hw;
78 };
79 
80 int firewire_debug=0, try_bmr=1, hold_count=0;
81 SYSCTL_INT(_debug, OID_AUTO, firewire_debug, CTLFLAG_RW, &firewire_debug, 0,
82 	"FireWire driver debug flag");
83 SYSCTL_NODE(_hw, OID_AUTO, firewire, CTLFLAG_RD, 0, "FireWire Subsystem");
84 SYSCTL_INT(_hw_firewire, OID_AUTO, try_bmr, CTLFLAG_RW, &try_bmr, 0,
85 	"Try to be a bus manager");
86 SYSCTL_INT(_hw_firewire, OID_AUTO, hold_count, CTLFLAG_RW, &hold_count, 0,
87 	"Number of count of bus resets for removing lost device information");
88 
89 MALLOC_DEFINE(M_FW, "firewire", "FireWire");
90 MALLOC_DEFINE(M_FWXFER, "fw_xfer", "XFER/FireWire");
91 
92 #define FW_MAXASYRTY 4
93 
94 devclass_t firewire_devclass;
95 
96 static void firewire_identify	(driver_t *, device_t);
97 static int firewire_probe	(device_t);
98 static int firewire_attach      (device_t);
99 static int firewire_detach      (device_t);
100 static int firewire_resume      (device_t);
101 static void firewire_xfer_timeout(void *, int);
102 #if 0
103 static int firewire_shutdown    (device_t);
104 #endif
105 static device_t firewire_add_child(device_t, u_int, const char *, int);
106 static void fw_try_bmr (void *);
107 static void fw_try_bmr_callback (struct fw_xfer *);
108 static void fw_asystart (struct fw_xfer *);
109 static int fw_get_tlabel (struct firewire_comm *, struct fw_xfer *);
110 static void fw_bus_probe (struct firewire_comm *);
111 static void fw_attach_dev (struct firewire_comm *);
112 static void fw_bus_probe_thread(void *);
113 #ifdef FW_VMACCESS
114 static void fw_vmaccess (struct fw_xfer *);
115 #endif
116 static int fw_bmr (struct firewire_comm *);
117 static void fw_dump_hdr(struct fw_pkt *, char *);
118 
119 static device_method_t firewire_methods[] = {
120 	/* Device interface */
121 	DEVMETHOD(device_identify,	firewire_identify),
122 	DEVMETHOD(device_probe,		firewire_probe),
123 	DEVMETHOD(device_attach,	firewire_attach),
124 	DEVMETHOD(device_detach,	firewire_detach),
125 	DEVMETHOD(device_suspend,	bus_generic_suspend),
126 	DEVMETHOD(device_resume,	firewire_resume),
127 	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
128 
129 	/* Bus interface */
130 	DEVMETHOD(bus_add_child,	firewire_add_child),
131 
132 	DEVMETHOD_END
133 };
134 char *linkspeed[] = {
135 	"S100", "S200", "S400", "S800",
136 	"S1600", "S3200", "undef", "undef"
137 };
138 
139 static char *tcode_str[] = {
140 	"WREQQ", "WREQB", "WRES",   "undef",
141 	"RREQQ", "RREQB", "RRESQ",  "RRESB",
142 	"CYCS",  "LREQ",  "STREAM", "LRES",
143 	"undef", "undef", "PHY",    "undef"
144 };
145 
146 /* IEEE-1394a Table C-2 Gap count as a function of hops*/
147 #define MAX_GAPHOP 15
148 u_int gap_cnt[] = { 5,  5,  7,  8, 10, 13, 16, 18,
149 		   21, 24, 26, 29, 32, 35, 37, 40};
150 
151 static driver_t firewire_driver = {
152 	"firewire",
153 	firewire_methods,
154 	sizeof(struct firewire_softc),
155 };
156 
157 /*
158  * Lookup fwdev by node id.
159  */
160 struct fw_device *
161 fw_noderesolve_nodeid(struct firewire_comm *fc, int dst)
162 {
163 	struct fw_device *fwdev;
164 	int s;
165 
166 	s = splfw();
167 	STAILQ_FOREACH(fwdev, &fc->devices, link)
168 		if (fwdev->dst == dst && fwdev->status != FWDEVINVAL)
169 			break;
170 	splx(s);
171 
172 	return fwdev;
173 }
174 
175 /*
176  * Lookup fwdev by EUI64.
177  */
178 struct fw_device *
179 fw_noderesolve_eui64(struct firewire_comm *fc, struct fw_eui64 *eui)
180 {
181 	struct fw_device *fwdev;
182 	int s;
183 
184 	s = splfw();
185 	FW_GLOCK(fc);
186 	STAILQ_FOREACH(fwdev, &fc->devices, link)
187 		if (FW_EUI64_EQUAL(fwdev->eui, *eui))
188 			break;
189 	FW_GUNLOCK(fc);
190 	splx(s);
191 
192 	if(fwdev == NULL) return NULL;
193 	if(fwdev->status == FWDEVINVAL) return NULL;
194 	return fwdev;
195 }
196 
197 /*
198  * Async. request procedure for userland application.
199  */
200 int
201 fw_asyreq(struct firewire_comm *fc, int sub, struct fw_xfer *xfer)
202 {
203 	int err = 0;
204 	struct fw_xferq *xferq;
205 	int len;
206 	struct fw_pkt *fp;
207 	int tcode;
208 	struct tcode_info *info;
209 
210 	if(xfer == NULL) return EINVAL;
211 	if(xfer->hand == NULL){
212 		printf("hand == NULL\n");
213 		return EINVAL;
214 	}
215 	fp = &xfer->send.hdr;
216 
217 	tcode = fp->mode.common.tcode & 0xf;
218 	info = &fc->tcode[tcode];
219 	if (info->flag == 0) {
220 		printf("invalid tcode=%x\n", tcode);
221 		return EINVAL;
222 	}
223 
224 	/* XXX allow bus explore packets only after bus rest */
225 	if ((fc->status < FWBUSEXPLORE) &&
226 	    ((tcode != FWTCODE_RREQQ) || (fp->mode.rreqq.dest_hi != 0xffff) ||
227 	    (fp->mode.rreqq.dest_lo  < 0xf0000000) ||
228 	    (fp->mode.rreqq.dest_lo >= 0xf0001000))) {
229 		xfer->resp = EAGAIN;
230 		xfer->flag = FWXF_BUSY;
231 		return (EAGAIN);
232 	}
233 
234 	if (info->flag & FWTI_REQ)
235 		xferq = fc->atq;
236 	else
237 		xferq = fc->ats;
238 	len = info->hdr_len;
239 	if (xfer->send.pay_len > MAXREC(fc->maxrec)) {
240 		printf("send.pay_len > maxrec\n");
241 		return EINVAL;
242 	}
243 	if (info->flag & FWTI_BLOCK_STR)
244 		len = fp->mode.stream.len;
245 	else if (info->flag & FWTI_BLOCK_ASY)
246 		len = fp->mode.rresb.len;
247 	else
248 		len = 0;
249 	if (len != xfer->send.pay_len){
250 		printf("len(%d) != send.pay_len(%d) %s(%x)\n",
251 		    len, xfer->send.pay_len, tcode_str[tcode], tcode);
252 		return EINVAL;
253 	}
254 
255 	if(xferq->start == NULL){
256 		printf("xferq->start == NULL\n");
257 		return EINVAL;
258 	}
259 	if(!(xferq->queued < xferq->maxq)){
260 		device_printf(fc->bdev, "Discard a packet (queued=%d)\n",
261 			xferq->queued);
262 		return EAGAIN;
263 	}
264 
265 	xfer->tl = -1;
266 	if (info->flag & FWTI_TLABEL) {
267 		if (fw_get_tlabel(fc, xfer) < 0)
268 			return EAGAIN;
269 	}
270 
271 	xfer->resp = 0;
272 	xfer->fc = fc;
273 	xfer->q = xferq;
274 
275 	fw_asystart(xfer);
276 	return err;
277 }
278 /*
279  * Wakeup blocked process.
280  */
281 void
282 fw_xferwake(struct fw_xfer *xfer)
283 {
284 	struct mtx *lock = &xfer->fc->wait_lock;
285 
286 	mtx_lock(lock);
287 	xfer->flag |= FWXF_WAKE;
288 	mtx_unlock(lock);
289 
290 	wakeup(xfer);
291 	return;
292 }
293 
294 int
295 fw_xferwait(struct fw_xfer *xfer)
296 {
297 	struct mtx *lock = &xfer->fc->wait_lock;
298 	int err = 0;
299 
300 	mtx_lock(lock);
301 	if ((xfer->flag & FWXF_WAKE) == 0)
302 		err = msleep((void *)xfer, lock, PWAIT|PCATCH, "fw_xferwait", 0);
303 	mtx_unlock(lock);
304 
305 	return (err);
306 }
307 
308 /*
309  * Async. request with given xfer structure.
310  */
311 static void
312 fw_asystart(struct fw_xfer *xfer)
313 {
314 	struct firewire_comm *fc = xfer->fc;
315 	int s;
316 	s = splfw();
317 	/* Protect from interrupt/timeout */
318 	FW_GLOCK(fc);
319 	xfer->flag = FWXF_INQ;
320 	STAILQ_INSERT_TAIL(&xfer->q->q, xfer, link);
321 #if 0
322 	xfer->q->queued ++;
323 #endif
324 	FW_GUNLOCK(fc);
325 	splx(s);
326 	/* XXX just queue for mbuf */
327 	if (xfer->mbuf == NULL)
328 		xfer->q->start(fc);
329 	return;
330 }
331 
332 static void
333 firewire_identify(driver_t *driver, device_t parent)
334 {
335 	BUS_ADD_CHILD(parent, 0, "firewire", -1);
336 }
337 
338 static int
339 firewire_probe(device_t dev)
340 {
341 	device_set_desc(dev, "IEEE1394(FireWire) bus");
342 	return (0);
343 }
344 
345 static void
346 firewire_xfer_timeout(void *arg, int pending)
347 {
348 	struct firewire_comm *fc = (struct firewire_comm *)arg;
349 	struct fw_xfer *xfer, *txfer;
350 	struct timeval tv;
351 	struct timeval split_timeout;
352 	STAILQ_HEAD(, fw_xfer) xfer_timeout;
353 	int i, s;
354 
355 	split_timeout.tv_sec = 0;
356 	split_timeout.tv_usec = 200 * 1000;	 /* 200 msec */
357 
358 	microtime(&tv);
359 	timevalsub(&tv, &split_timeout);
360 	STAILQ_INIT(&xfer_timeout);
361 
362 	s = splfw();
363 	mtx_lock(&fc->tlabel_lock);
364 	for (i = 0; i < 0x40; i ++) {
365 		while ((xfer = STAILQ_FIRST(&fc->tlabels[i])) != NULL) {
366 			if ((xfer->flag & FWXF_SENT) == 0)
367 				/* not sent yet */
368 				break;
369 			if (timevalcmp(&xfer->tv, &tv, >))
370 				/* the rests are newer than this */
371 				break;
372 			device_printf(fc->bdev,
373 				"split transaction timeout: "
374 				"tl=0x%x flag=0x%02x\n", i, xfer->flag);
375 			fw_dump_hdr(&xfer->send.hdr, "send");
376 			xfer->resp = ETIMEDOUT;
377 			xfer->tl = -1;
378 			STAILQ_REMOVE_HEAD(&fc->tlabels[i], tlabel);
379 			STAILQ_INSERT_TAIL(&xfer_timeout, xfer, tlabel);
380 		}
381 	}
382 	mtx_unlock(&fc->tlabel_lock);
383 	splx(s);
384 	fc->timeout(fc);
385 
386 	STAILQ_FOREACH_SAFE(xfer, &xfer_timeout, tlabel, txfer)
387 		xfer->hand(xfer);
388 }
389 
390 #define WATCHDOG_HZ 10
391 static void
392 firewire_watchdog(void *arg)
393 {
394 	struct firewire_comm *fc;
395 	static int watchdog_clock = 0;
396 
397 	fc = (struct firewire_comm *)arg;
398 
399 	/*
400 	 * At boot stage, the device interrupt is disabled and
401 	 * We encounter a timeout easily. To avoid this,
402 	 * ignore clock interrupt for a while.
403 	 */
404 	if (watchdog_clock > WATCHDOG_HZ * 15)
405 		taskqueue_enqueue(fc->taskqueue, &fc->task_timeout);
406 	else
407 		watchdog_clock ++;
408 
409 	callout_reset(&fc->timeout_callout, hz / WATCHDOG_HZ,
410 			(void *)firewire_watchdog, (void *)fc);
411 }
412 
413 /*
414  * The attach routine.
415  */
416 static int
417 firewire_attach(device_t dev)
418 {
419 	int unit;
420 	struct firewire_softc *sc = device_get_softc(dev);
421 	device_t pa = device_get_parent(dev);
422 	struct firewire_comm *fc;
423 
424 	fc = (struct firewire_comm *)device_get_softc(pa);
425 	sc->fc = fc;
426 	fc->status = FWBUSNOTREADY;
427 
428 	unit = device_get_unit(dev);
429 	if( fc->nisodma > FWMAXNDMA) fc->nisodma = FWMAXNDMA;
430 
431 	fwdev_makedev(sc);
432 
433 	fc->crom_src_buf = (struct crom_src_buf *)malloc(
434 				sizeof(struct crom_src_buf),
435 				M_FW, M_NOWAIT | M_ZERO);
436 	if (fc->crom_src_buf == NULL) {
437 		device_printf(fc->dev, "%s: Malloc Failure crom src buff\n", __func__);
438 		return ENOMEM;
439 	}
440 	fc->topology_map = (struct fw_topology_map *)malloc(
441 				sizeof(struct fw_topology_map),
442 				M_FW, M_NOWAIT | M_ZERO);
443 	if (fc->topology_map == NULL) {
444 		device_printf(fc->dev, "%s: Malloc Failure topology map\n", __func__);
445 		free(fc->crom_src_buf, M_FW);
446 		return ENOMEM;
447 	}
448 	fc->speed_map = (struct fw_speed_map *)malloc(
449 				sizeof(struct fw_speed_map),
450 				M_FW, M_NOWAIT | M_ZERO);
451 	if (fc->speed_map == NULL) {
452 		device_printf(fc->dev, "%s: Malloc Failure speed map\n", __func__);
453 		free(fc->crom_src_buf, M_FW);
454 		free(fc->topology_map, M_FW);
455 		return ENOMEM;
456 	}
457 
458 	mtx_init(&fc->wait_lock, "fwwait", NULL, MTX_DEF);
459 	mtx_init(&fc->tlabel_lock, "fwtlabel", NULL, MTX_DEF);
460 	CALLOUT_INIT(&fc->timeout_callout);
461 	CALLOUT_INIT(&fc->bmr_callout);
462 	CALLOUT_INIT(&fc->busprobe_callout);
463 	TASK_INIT(&fc->task_timeout, 0, firewire_xfer_timeout, (void *)fc);
464 
465 	callout_reset(&sc->fc->timeout_callout, hz,
466 			(void *)firewire_watchdog, (void *)sc->fc);
467 
468 	/* create thread */
469 	kproc_create(fw_bus_probe_thread, (void *)fc, &fc->probe_thread,
470 		0, 0, "fw%d_probe", unit);
471 
472 	/* Locate our children */
473 	bus_generic_probe(dev);
474 
475 	/* launch attachement of the added children */
476 	bus_generic_attach(dev);
477 
478 	/* bus_reset */
479 	FW_GLOCK(fc);
480 	fw_busreset(fc, FWBUSNOTREADY);
481 	FW_GUNLOCK(fc);
482 	fc->ibr(fc);
483 
484 	return 0;
485 }
486 
487 /*
488  * Attach it as child.
489  */
490 static device_t
491 firewire_add_child(device_t dev, u_int order, const char *name, int unit)
492 {
493         device_t child;
494 	struct firewire_softc *sc;
495 
496 	sc = (struct firewire_softc *)device_get_softc(dev);
497 	child = device_add_child(dev, name, unit);
498 	if (child) {
499 		device_set_ivars(child, sc->fc);
500 		device_probe_and_attach(child);
501 	}
502 
503 	return child;
504 }
505 
506 static int
507 firewire_resume(device_t dev)
508 {
509 	struct firewire_softc *sc;
510 
511 	sc = (struct firewire_softc *)device_get_softc(dev);
512 	sc->fc->status = FWBUSNOTREADY;
513 
514 	bus_generic_resume(dev);
515 
516 	return(0);
517 }
518 
519 /*
520  * Dettach it.
521  */
522 static int
523 firewire_detach(device_t dev)
524 {
525 	struct firewire_softc *sc;
526 	struct firewire_comm *fc;
527 	struct fw_device *fwdev, *fwdev_next;
528 	int err;
529 
530 	sc = (struct firewire_softc *)device_get_softc(dev);
531 	fc = sc->fc;
532 	mtx_lock(&fc->wait_lock);
533 	fc->status = FWBUSDETACH;
534 	wakeup(fc);
535 	if (msleep(fc->probe_thread, &fc->wait_lock, PWAIT, "fwthr", hz * 60))
536 		printf("firewire probe thread didn't die\n");
537 	mtx_unlock(&fc->wait_lock);
538 
539 	if (fc->arq !=0 && fc->arq->maxq > 0)
540 		fw_drain_txq(fc);
541 
542 	if ((err = fwdev_destroydev(sc)) != 0)
543 		return err;
544 
545 	if ((err = bus_generic_detach(dev)) != 0)
546 		return err;
547 
548 	callout_stop(&fc->timeout_callout);
549 	callout_stop(&fc->bmr_callout);
550 	callout_stop(&fc->busprobe_callout);
551 
552 	/* XXX xfer_free and untimeout on all xfers */
553 	for (fwdev = STAILQ_FIRST(&fc->devices); fwdev != NULL;
554 							fwdev = fwdev_next) {
555 		fwdev_next = STAILQ_NEXT(fwdev, link);
556 		free(fwdev, M_FW);
557 	}
558 	free(fc->topology_map, M_FW);
559 	free(fc->speed_map, M_FW);
560 	free(fc->crom_src_buf, M_FW);
561 
562 	mtx_destroy(&fc->tlabel_lock);
563 	mtx_destroy(&fc->wait_lock);
564 	return(0);
565 }
566 #if 0
567 static int
568 firewire_shutdown( device_t dev )
569 {
570 	return 0;
571 }
572 #endif
573 
574 
575 static void
576 fw_xferq_drain(struct fw_xferq *xferq)
577 {
578 	struct fw_xfer *xfer;
579 
580 	while ((xfer = STAILQ_FIRST(&xferq->q)) != NULL) {
581 		STAILQ_REMOVE_HEAD(&xferq->q, link);
582 #if 0
583 		xferq->queued --;
584 #endif
585 		xfer->resp = EAGAIN;
586 		xfer->flag = FWXF_SENTERR;
587 		fw_xfer_done(xfer);
588 	}
589 }
590 
591 void
592 fw_drain_txq(struct firewire_comm *fc)
593 {
594 	struct fw_xfer *xfer, *txfer;
595 	STAILQ_HEAD(, fw_xfer) xfer_drain;
596 	int i;
597 
598 	STAILQ_INIT(&xfer_drain);
599 
600 	FW_GLOCK(fc);
601 	fw_xferq_drain(fc->atq);
602 	fw_xferq_drain(fc->ats);
603 	for(i = 0; i < fc->nisodma; i++)
604 		fw_xferq_drain(fc->it[i]);
605 	FW_GUNLOCK(fc);
606 
607 	mtx_lock(&fc->tlabel_lock);
608 	for (i = 0; i < 0x40; i ++)
609 		while ((xfer = STAILQ_FIRST(&fc->tlabels[i])) != NULL) {
610 			if (firewire_debug)
611 				printf("tl=%d flag=%d\n", i, xfer->flag);
612 			xfer->tl = -1;
613 			xfer->resp = EAGAIN;
614 			STAILQ_REMOVE_HEAD(&fc->tlabels[i], tlabel);
615 			STAILQ_INSERT_TAIL(&xfer_drain, xfer, tlabel);
616 		}
617 	mtx_unlock(&fc->tlabel_lock);
618 
619 	STAILQ_FOREACH_SAFE(xfer, &xfer_drain, tlabel, txfer)
620 		xfer->hand(xfer);
621 }
622 
623 static void
624 fw_reset_csr(struct firewire_comm *fc)
625 {
626 	int i;
627 
628 	CSRARC(fc, STATE_CLEAR)
629 			= 1 << 23 | 0 << 17 | 1 << 16 | 1 << 15 | 1 << 14 ;
630 	CSRARC(fc, STATE_SET) = CSRARC(fc, STATE_CLEAR);
631 	CSRARC(fc, NODE_IDS) = 0x3f;
632 
633 	CSRARC(fc, TOPO_MAP + 8) = 0;
634 	fc->irm = -1;
635 
636 	fc->max_node = -1;
637 
638 	for(i = 2; i < 0x100/4 - 2 ; i++){
639 		CSRARC(fc, SPED_MAP + i * 4) = 0;
640 	}
641 	CSRARC(fc, STATE_CLEAR) = 1 << 23 | 0 << 17 | 1 << 16 | 1 << 15 | 1 << 14 ;
642 	CSRARC(fc, STATE_SET) = CSRARC(fc, STATE_CLEAR);
643 	CSRARC(fc, RESET_START) = 0;
644 	CSRARC(fc, SPLIT_TIMEOUT_HI) = 0;
645 	CSRARC(fc, SPLIT_TIMEOUT_LO) = 800 << 19;
646 	CSRARC(fc, CYCLE_TIME) = 0x0;
647 	CSRARC(fc, BUS_TIME) = 0x0;
648 	CSRARC(fc, BUS_MGR_ID) = 0x3f;
649 	CSRARC(fc, BANDWIDTH_AV) = 4915;
650 	CSRARC(fc, CHANNELS_AV_HI) = 0xffffffff;
651 	CSRARC(fc, CHANNELS_AV_LO) = 0xffffffff;
652 	CSRARC(fc, IP_CHANNELS) = (1U << 31);
653 
654 	CSRARC(fc, CONF_ROM) = 0x04 << 24;
655 	CSRARC(fc, CONF_ROM + 4) = 0x31333934; /* means strings 1394 */
656 	CSRARC(fc, CONF_ROM + 8) = 1 << 31 | 1 << 30 | 1 << 29 |
657 				1 << 28 | 0xff << 16 | 0x09 << 8;
658 	CSRARC(fc, CONF_ROM + 0xc) = 0;
659 
660 /* DV depend CSRs see blue book */
661 	CSRARC(fc, oPCR) &= ~DV_BROADCAST_ON;
662 	CSRARC(fc, iPCR) &= ~DV_BROADCAST_ON;
663 
664 	CSRARC(fc, STATE_CLEAR) &= ~(1 << 23 | 1 << 15 | 1 << 14 );
665 	CSRARC(fc, STATE_SET) = CSRARC(fc, STATE_CLEAR);
666 }
667 
668 static void
669 fw_init_crom(struct firewire_comm *fc)
670 {
671 	struct crom_src *src;
672 
673 	src = &fc->crom_src_buf->src;
674 	bzero(src, sizeof(struct crom_src));
675 
676 	/* BUS info sample */
677 	src->hdr.info_len = 4;
678 
679 	src->businfo.bus_name = CSR_BUS_NAME_IEEE1394;
680 
681 	src->businfo.irmc = 1;
682 	src->businfo.cmc = 1;
683 	src->businfo.isc = 1;
684 	src->businfo.bmc = 1;
685 	src->businfo.pmc = 0;
686 	src->businfo.cyc_clk_acc = 100;
687 	src->businfo.max_rec = fc->maxrec;
688 	src->businfo.max_rom = MAXROM_4;
689 #define FW_GENERATION_CHANGEABLE 2
690 	src->businfo.generation = FW_GENERATION_CHANGEABLE;
691 	src->businfo.link_spd = fc->speed;
692 
693 	src->businfo.eui64.hi = fc->eui.hi;
694 	src->businfo.eui64.lo = fc->eui.lo;
695 
696 	STAILQ_INIT(&src->chunk_list);
697 
698 	fc->crom_src = src;
699 	fc->crom_root = &fc->crom_src_buf->root;
700 }
701 
702 static void
703 fw_reset_crom(struct firewire_comm *fc)
704 {
705 	struct crom_src_buf *buf;
706 	struct crom_src *src;
707 	struct crom_chunk *root;
708 
709 	buf =  fc->crom_src_buf;
710 	src = fc->crom_src;
711 	root = fc->crom_root;
712 
713 	STAILQ_INIT(&src->chunk_list);
714 
715 	bzero(root, sizeof(struct crom_chunk));
716 	crom_add_chunk(src, NULL, root, 0);
717 	crom_add_entry(root, CSRKEY_NCAP, 0x0083c0); /* XXX */
718 	/* private company_id */
719 	crom_add_entry(root, CSRKEY_VENDOR, CSRVAL_VENDOR_PRIVATE);
720 #ifdef __DragonFly__
721 	crom_add_simple_text(src, root, &buf->vendor, "DragonFly Project");
722 	crom_add_entry(root, CSRKEY_HW, __DragonFly_cc_version);
723 #else
724 	crom_add_simple_text(src, root, &buf->vendor, "FreeBSD Project");
725 	crom_add_entry(root, CSRKEY_HW, __FreeBSD_version);
726 #endif
727 	mtx_lock(&prison0.pr_mtx);
728 	crom_add_simple_text(src, root, &buf->hw, prison0.pr_hostname);
729 	mtx_unlock(&prison0.pr_mtx);
730 }
731 
732 /*
733  * Called after bus reset.
734  */
735 void
736 fw_busreset(struct firewire_comm *fc, uint32_t new_status)
737 {
738 	struct firewire_dev_comm *fdc;
739 	struct crom_src *src;
740 	device_t *devlistp;
741 	uint32_t *newrom;
742 	int i, devcnt;
743 
744 	FW_GLOCK_ASSERT(fc);
745 	if (fc->status == FWBUSMGRELECT)
746 		callout_stop(&fc->bmr_callout);
747 
748 	fc->status = new_status;
749 	fw_reset_csr(fc);
750 
751 	if (fc->status == FWBUSNOTREADY)
752 		fw_init_crom(fc);
753 
754 	fw_reset_crom(fc);
755 
756 	if (device_get_children(fc->bdev, &devlistp, &devcnt) == 0) {
757 		for( i = 0 ; i < devcnt ; i++)
758 			if (device_get_state(devlistp[i]) >= DS_ATTACHED)  {
759 				fdc = device_get_softc(devlistp[i]);
760 				if (fdc->post_busreset != NULL)
761 					fdc->post_busreset(fdc);
762 			}
763 		free(devlistp, M_TEMP);
764 	}
765 
766 	src = &fc->crom_src_buf->src;
767         /*
768          * If the old config rom needs to be overwritten,
769          * bump the businfo.generation indicator to
770          * indicate that we need to be reprobed
771          * See 1394a-2000 8.3.2.5.4 for more details.
772          * generation starts at 2 and rolls over at 0xF
773          * back to 2.
774          *
775          * A generation of 0 indicates a device
776          * that is not 1394a-2000 compliant.
777          * A generation of 1 indicates a device that
778          * does not change it's Bus Info Block or
779          * Configuration ROM.
780          */
781 #define FW_MAX_GENERATION 0xF
782 	newrom = malloc(CROMSIZE, M_FW, M_NOWAIT | M_ZERO);
783 	src = &fc->crom_src_buf->src;
784 	crom_load(src, newrom, CROMSIZE);
785 	if (bcmp(newrom, fc->config_rom, CROMSIZE) != 0) {
786 		if ( src->businfo.generation++ > FW_MAX_GENERATION )
787 			src->businfo.generation = FW_GENERATION_CHANGEABLE;
788 		bcopy(newrom, (void *)fc->config_rom, CROMSIZE);
789 	}
790 	free(newrom, M_FW);
791 
792 }
793 
794 /* Call once after reboot */
795 void fw_init(struct firewire_comm *fc)
796 {
797 	int i;
798 #ifdef FW_VMACCESS
799 	struct fw_xfer *xfer;
800 	struct fw_bind *fwb;
801 #endif
802 
803 	fc->arq->queued = 0;
804 	fc->ars->queued = 0;
805 	fc->atq->queued = 0;
806 	fc->ats->queued = 0;
807 
808 	fc->arq->buf = NULL;
809 	fc->ars->buf = NULL;
810 	fc->atq->buf = NULL;
811 	fc->ats->buf = NULL;
812 
813 	fc->arq->flag = 0;
814 	fc->ars->flag = 0;
815 	fc->atq->flag = 0;
816 	fc->ats->flag = 0;
817 
818 	STAILQ_INIT(&fc->atq->q);
819 	STAILQ_INIT(&fc->ats->q);
820 
821 	for( i = 0 ; i < fc->nisodma ; i ++ ){
822 		fc->it[i]->queued = 0;
823 		fc->ir[i]->queued = 0;
824 
825 		fc->it[i]->start = NULL;
826 		fc->ir[i]->start = NULL;
827 
828 		fc->it[i]->buf = NULL;
829 		fc->ir[i]->buf = NULL;
830 
831 		fc->it[i]->flag = FWXFERQ_STREAM;
832 		fc->ir[i]->flag = FWXFERQ_STREAM;
833 
834 		STAILQ_INIT(&fc->it[i]->q);
835 		STAILQ_INIT(&fc->ir[i]->q);
836 	}
837 
838 	fc->arq->maxq = FWMAXQUEUE;
839 	fc->ars->maxq = FWMAXQUEUE;
840 	fc->atq->maxq = FWMAXQUEUE;
841 	fc->ats->maxq = FWMAXQUEUE;
842 
843 	for( i = 0 ; i < fc->nisodma ; i++){
844 		fc->ir[i]->maxq = FWMAXQUEUE;
845 		fc->it[i]->maxq = FWMAXQUEUE;
846 	}
847 
848 	CSRARC(fc, TOPO_MAP) = 0x3f1 << 16;
849 	CSRARC(fc, TOPO_MAP + 4) = 1;
850 	CSRARC(fc, SPED_MAP) = 0x3f1 << 16;
851 	CSRARC(fc, SPED_MAP + 4) = 1;
852 
853 	STAILQ_INIT(&fc->devices);
854 
855 /* Initialize Async handlers */
856 	STAILQ_INIT(&fc->binds);
857 	for( i = 0 ; i < 0x40 ; i++){
858 		STAILQ_INIT(&fc->tlabels[i]);
859 	}
860 
861 /* DV depend CSRs see blue book */
862 #if 0
863 	CSRARC(fc, oMPR) = 0x3fff0001; /* # output channel = 1 */
864 	CSRARC(fc, oPCR) = 0x8000007a;
865 	for(i = 4 ; i < 0x7c/4 ; i+=4){
866 		CSRARC(fc, i + oPCR) = 0x8000007a;
867 	}
868 
869 	CSRARC(fc, iMPR) = 0x00ff0001; /* # input channel = 1 */
870 	CSRARC(fc, iPCR) = 0x803f0000;
871 	for(i = 4 ; i < 0x7c/4 ; i+=4){
872 		CSRARC(fc, i + iPCR) = 0x0;
873 	}
874 #endif
875 
876 	fc->crom_src_buf = NULL;
877 
878 #ifdef FW_VMACCESS
879 	xfer = fw_xfer_alloc();
880 	if(xfer == NULL) return;
881 
882 	fwb = (struct fw_bind *)malloc(sizeof (struct fw_bind), M_FW, M_NOWAIT);
883 	if(fwb == NULL){
884 		fw_xfer_free(xfer);
885 		return;
886 	}
887 	xfer->hand = fw_vmaccess;
888 	xfer->fc = fc;
889 	xfer->sc = NULL;
890 
891 	fwb->start_hi = 0x2;
892 	fwb->start_lo = 0;
893 	fwb->addrlen = 0xffffffff;
894 	fwb->xfer = xfer;
895 	fw_bindadd(fc, fwb);
896 #endif
897 }
898 
899 #define BIND_CMP(addr, fwb) (((addr) < (fwb)->start)?-1:\
900     ((fwb)->end < (addr))?1:0)
901 
902 /*
903  * To lookup bound process from IEEE1394 address.
904  */
905 struct fw_bind *
906 fw_bindlookup(struct firewire_comm *fc, uint16_t dest_hi, uint32_t dest_lo)
907 {
908 	u_int64_t addr;
909 	struct fw_bind *tfw, *r = NULL;
910 
911 	addr = ((u_int64_t)dest_hi << 32) | dest_lo;
912 	FW_GLOCK(fc);
913 	STAILQ_FOREACH(tfw, &fc->binds, fclist)
914 		if (BIND_CMP(addr, tfw) == 0) {
915 			r = tfw;
916 			break;
917 		}
918 	FW_GUNLOCK(fc);
919 	return(r);
920 }
921 
922 /*
923  * To bind IEEE1394 address block to process.
924  */
925 int
926 fw_bindadd(struct firewire_comm *fc, struct fw_bind *fwb)
927 {
928 	struct fw_bind *tfw, *prev = NULL;
929 	int r = 0;
930 
931 	if (fwb->start > fwb->end) {
932 		printf("%s: invalid range\n", __func__);
933 		return EINVAL;
934 	}
935 
936 	FW_GLOCK(fc);
937 	STAILQ_FOREACH(tfw, &fc->binds, fclist) {
938 		if (fwb->end < tfw->start)
939 			break;
940 		prev = tfw;
941 	}
942 	if (prev == NULL)
943 		STAILQ_INSERT_HEAD(&fc->binds, fwb, fclist);
944 	else if (prev->end < fwb->start)
945 		STAILQ_INSERT_AFTER(&fc->binds, prev, fwb, fclist);
946 	else {
947 		printf("%s: bind failed\n", __func__);
948 		r = EBUSY;
949 	}
950 	FW_GUNLOCK(fc);
951 	return (r);
952 }
953 
954 /*
955  * To free IEEE1394 address block.
956  */
957 int
958 fw_bindremove(struct firewire_comm *fc, struct fw_bind *fwb)
959 {
960 #if 0
961 	struct fw_xfer *xfer, *next;
962 #endif
963 	struct fw_bind *tfw;
964 	int s;
965 
966 	s = splfw();
967 	FW_GLOCK(fc);
968 	STAILQ_FOREACH(tfw, &fc->binds, fclist)
969 		if (tfw == fwb) {
970 			STAILQ_REMOVE(&fc->binds, fwb, fw_bind, fclist);
971 			goto found;
972 		}
973 
974 	printf("%s: no such binding\n", __func__);
975 	FW_GUNLOCK(fc);
976 	splx(s);
977 	return (1);
978 found:
979 #if 0
980 	/* shall we do this? */
981 	for (xfer = STAILQ_FIRST(&fwb->xferlist); xfer != NULL; xfer = next) {
982 		next = STAILQ_NEXT(xfer, link);
983 		fw_xfer_free(xfer);
984 	}
985 	STAILQ_INIT(&fwb->xferlist);
986 #endif
987 	FW_GUNLOCK(fc);
988 
989 	splx(s);
990 	return 0;
991 }
992 
993 int
994 fw_xferlist_add(struct fw_xferlist *q, struct malloc_type *type,
995     int slen, int rlen, int n,
996     struct firewire_comm *fc, void *sc, void (*hand)(struct fw_xfer *))
997 {
998 	int i, s;
999 	struct fw_xfer *xfer;
1000 
1001 	for (i = 0; i < n; i++) {
1002 		xfer = fw_xfer_alloc_buf(type, slen, rlen);
1003 		if (xfer == NULL)
1004 			return (n);
1005 		xfer->fc = fc;
1006 		xfer->sc = sc;
1007 		xfer->hand = hand;
1008 		s = splfw();
1009 		STAILQ_INSERT_TAIL(q, xfer, link);
1010 		splx(s);
1011 	}
1012 	return (n);
1013 }
1014 
1015 void
1016 fw_xferlist_remove(struct fw_xferlist *q)
1017 {
1018 	struct fw_xfer *xfer, *next;
1019 
1020 	for (xfer = STAILQ_FIRST(q); xfer != NULL; xfer = next) {
1021                 next = STAILQ_NEXT(xfer, link);
1022                 fw_xfer_free_buf(xfer);
1023         }
1024         STAILQ_INIT(q);
1025 }
1026 /*
1027  * dump packet header
1028  */
1029 static void
1030 fw_dump_hdr(struct fw_pkt *fp, char *prefix)
1031 {
1032 	printf("%s: dst=0x%02x tl=0x%02x rt=%d tcode=0x%x pri=0x%x "
1033 	    "src=0x%03x\n", prefix,
1034 	    fp->mode.hdr.dst & 0x3f,
1035 	    fp->mode.hdr.tlrt >> 2, fp->mode.hdr.tlrt & 3,
1036 	    fp->mode.hdr.tcode, fp->mode.hdr.pri,
1037 	    fp->mode.hdr.src);
1038 }
1039 
1040 /*
1041  * To free transaction label.
1042  */
1043 static void
1044 fw_tl_free(struct firewire_comm *fc, struct fw_xfer *xfer)
1045 {
1046 	struct fw_xfer *txfer;
1047 	int s;
1048 
1049 	s = splfw();
1050 	mtx_lock(&fc->tlabel_lock);
1051 	if (xfer->tl < 0) {
1052 		mtx_unlock(&fc->tlabel_lock);
1053 		return;
1054 	}
1055 #if 1	/* make sure the label is allocated */
1056 	STAILQ_FOREACH(txfer, &fc->tlabels[xfer->tl], tlabel)
1057 		if(txfer == xfer)
1058 			break;
1059 	if (txfer == NULL) {
1060 		printf("%s: the xfer is not in the queue "
1061 		    "(tlabel=%d, flag=0x%x)\n",
1062 		    __FUNCTION__, xfer->tl, xfer->flag);
1063 		fw_dump_hdr(&xfer->send.hdr, "send");
1064 		fw_dump_hdr(&xfer->recv.hdr, "recv");
1065 		kdb_backtrace();
1066 		mtx_unlock(&fc->tlabel_lock);
1067 		splx(s);
1068 		return;
1069 	}
1070 #endif
1071 
1072 	STAILQ_REMOVE(&fc->tlabels[xfer->tl], xfer, fw_xfer, tlabel);
1073 	xfer->tl = -1;
1074 	mtx_unlock(&fc->tlabel_lock);
1075 	splx(s);
1076 	return;
1077 }
1078 
1079 /*
1080  * To obtain XFER structure by transaction label.
1081  */
1082 static struct fw_xfer *
1083 fw_tl2xfer(struct firewire_comm *fc, int node, int tlabel, int tcode)
1084 {
1085 	struct fw_xfer *xfer;
1086 	int s = splfw();
1087 	int req;
1088 
1089 	mtx_lock(&fc->tlabel_lock);
1090 	STAILQ_FOREACH(xfer, &fc->tlabels[tlabel], tlabel)
1091 		if(xfer->send.hdr.mode.hdr.dst == node) {
1092 			mtx_unlock(&fc->tlabel_lock);
1093 			splx(s);
1094 			KASSERT(xfer->tl == tlabel,
1095 				("xfer->tl 0x%x != 0x%x", xfer->tl, tlabel));
1096 			/* extra sanity check */
1097 			req = xfer->send.hdr.mode.hdr.tcode;
1098 			if (xfer->fc->tcode[req].valid_res != tcode) {
1099 				printf("%s: invalid response tcode "
1100 				    "(0x%x for 0x%x)\n", __FUNCTION__,
1101 				    tcode, req);
1102 				return(NULL);
1103 			}
1104 
1105 			if (firewire_debug > 2)
1106 				printf("fw_tl2xfer: found tl=%d\n", tlabel);
1107 			return(xfer);
1108 		}
1109 	mtx_unlock(&fc->tlabel_lock);
1110 	if (firewire_debug > 1)
1111 		printf("fw_tl2xfer: not found tl=%d\n", tlabel);
1112 	splx(s);
1113 	return(NULL);
1114 }
1115 
1116 /*
1117  * To allocate IEEE1394 XFER structure.
1118  */
1119 struct fw_xfer *
1120 fw_xfer_alloc(struct malloc_type *type)
1121 {
1122 	struct fw_xfer *xfer;
1123 
1124 	xfer = malloc(sizeof(struct fw_xfer), type, M_NOWAIT | M_ZERO);
1125 	if (xfer == NULL)
1126 		return xfer;
1127 
1128 	xfer->malloc = type;
1129 
1130 	return xfer;
1131 }
1132 
1133 struct fw_xfer *
1134 fw_xfer_alloc_buf(struct malloc_type *type, int send_len, int recv_len)
1135 {
1136 	struct fw_xfer *xfer;
1137 
1138 	xfer = fw_xfer_alloc(type);
1139 	if (xfer == NULL)
1140 		return(NULL);
1141 	xfer->send.pay_len = send_len;
1142 	xfer->recv.pay_len = recv_len;
1143 	if (send_len > 0) {
1144 		xfer->send.payload = malloc(send_len, type, M_NOWAIT | M_ZERO);
1145 		if (xfer->send.payload == NULL) {
1146 			fw_xfer_free(xfer);
1147 			return(NULL);
1148 		}
1149 	}
1150 	if (recv_len > 0) {
1151 		xfer->recv.payload = malloc(recv_len, type, M_NOWAIT);
1152 		if (xfer->recv.payload == NULL) {
1153 			if (xfer->send.payload != NULL)
1154 				free(xfer->send.payload, type);
1155 			fw_xfer_free(xfer);
1156 			return(NULL);
1157 		}
1158 	}
1159 	return(xfer);
1160 }
1161 
1162 /*
1163  * IEEE1394 XFER post process.
1164  */
1165 void
1166 fw_xfer_done(struct fw_xfer *xfer)
1167 {
1168 	if (xfer->hand == NULL) {
1169 		printf("hand == NULL\n");
1170 		return;
1171 	}
1172 
1173 	if (xfer->fc == NULL)
1174 		panic("fw_xfer_done: why xfer->fc is NULL?");
1175 
1176 	fw_tl_free(xfer->fc, xfer);
1177 	xfer->hand(xfer);
1178 }
1179 
1180 void
1181 fw_xfer_unload(struct fw_xfer* xfer)
1182 {
1183 	int s;
1184 
1185 	if(xfer == NULL ) return;
1186 	if(xfer->flag & FWXF_INQ){
1187 		printf("fw_xfer_free FWXF_INQ\n");
1188 		s = splfw();
1189 		FW_GLOCK(xfer->fc);
1190 		STAILQ_REMOVE(&xfer->q->q, xfer, fw_xfer, link);
1191 #if 0
1192 		xfer->q->queued --;
1193 #endif
1194 		FW_GUNLOCK(xfer->fc);
1195 		splx(s);
1196 	}
1197 	if (xfer->fc != NULL) {
1198 		/*
1199 		 * Ensure that any tlabel owner can't access this
1200 		 * xfer after it's freed.
1201 		 */
1202 		fw_tl_free(xfer->fc, xfer);
1203 #if 1
1204 		if(xfer->flag & FWXF_START)
1205 			/*
1206 			 * This could happen if:
1207 			 *  1. We call fwohci_arcv() before fwohci_txd().
1208 			 *  2. firewire_watch() is called.
1209 			 */
1210 			printf("fw_xfer_free FWXF_START\n");
1211 #endif
1212 	}
1213 	xfer->flag = FWXF_INIT;
1214 	xfer->resp = 0;
1215 }
1216 /*
1217  * To free IEEE1394 XFER structure.
1218  */
1219 void
1220 fw_xfer_free_buf( struct fw_xfer* xfer)
1221 {
1222 	if (xfer == NULL) {
1223 		printf("%s: xfer == NULL\n", __func__);
1224 		return;
1225 	}
1226 	fw_xfer_unload(xfer);
1227 	if(xfer->send.payload != NULL){
1228 		free(xfer->send.payload, xfer->malloc);
1229 	}
1230 	if(xfer->recv.payload != NULL){
1231 		free(xfer->recv.payload, xfer->malloc);
1232 	}
1233 	free(xfer, xfer->malloc);
1234 }
1235 
1236 void
1237 fw_xfer_free( struct fw_xfer* xfer)
1238 {
1239 	if (xfer == NULL) {
1240 		printf("%s: xfer == NULL\n", __func__);
1241 		return;
1242 	}
1243 	fw_xfer_unload(xfer);
1244 	free(xfer, xfer->malloc);
1245 }
1246 
1247 void
1248 fw_asy_callback_free(struct fw_xfer *xfer)
1249 {
1250 #if 0
1251 	printf("asyreq done flag=0x%02x resp=%d\n",
1252 				xfer->flag, xfer->resp);
1253 #endif
1254 	fw_xfer_free(xfer);
1255 }
1256 
1257 /*
1258  * To configure PHY.
1259  */
1260 static void
1261 fw_phy_config(struct firewire_comm *fc, int root_node, int gap_count)
1262 {
1263 	struct fw_xfer *xfer;
1264 	struct fw_pkt *fp;
1265 
1266 	fc->status = FWBUSPHYCONF;
1267 
1268 	xfer = fw_xfer_alloc(M_FWXFER);
1269 	if (xfer == NULL)
1270 		return;
1271 	xfer->fc = fc;
1272 	xfer->hand = fw_asy_callback_free;
1273 
1274 	fp = &xfer->send.hdr;
1275 	fp->mode.ld[1] = 0;
1276 	if (root_node >= 0)
1277 		fp->mode.ld[1] |= (root_node & 0x3f) << 24 | 1 << 23;
1278 	if (gap_count >= 0)
1279 		fp->mode.ld[1] |= 1 << 22 | (gap_count & 0x3f) << 16;
1280 	fp->mode.ld[2] = ~fp->mode.ld[1];
1281 /* XXX Dangerous, how to pass PHY packet to device driver */
1282 	fp->mode.common.tcode |= FWTCODE_PHY;
1283 
1284 	if (firewire_debug)
1285 		device_printf(fc->bdev, "%s: root_node=%d gap_count=%d\n",
1286 					__func__, root_node, gap_count);
1287 	fw_asyreq(fc, -1, xfer);
1288 }
1289 
1290 /*
1291  * Dump self ID.
1292  */
1293 static void
1294 fw_print_sid(uint32_t sid)
1295 {
1296 	union fw_self_id *s;
1297 	s = (union fw_self_id *) &sid;
1298 	if ( s->p0.sequel ) {
1299 		if ( s->p1.sequence_num == FW_SELF_ID_PAGE0 ) {
1300 			printf("node:%d p3:%d p4:%d p5:%d p6:%d p7:%d"
1301 				"p8:%d p9:%d p10:%d\n",
1302 				s->p1.phy_id, s->p1.port3, s->p1.port4,
1303 				s->p1.port5, s->p1.port6, s->p1.port7,
1304 				s->p1.port8, s->p1.port9, s->p1.port10);
1305 		} else if (s->p2.sequence_num == FW_SELF_ID_PAGE1 ){
1306 			printf("node:%d p11:%d p12:%d p13:%d p14:%d p15:%d\n",
1307 				s->p2.phy_id, s->p2.port11, s->p2.port12,
1308 				s->p2.port13, s->p2.port14, s->p2.port15);
1309 		} else {
1310 			printf("node:%d Unknown Self ID Page number %d\n",
1311 				s->p1.phy_id, s->p1.sequence_num);
1312 		}
1313 	} else {
1314 		printf("node:%d link:%d gap:%d spd:%d con:%d pwr:%d"
1315 			" p0:%d p1:%d p2:%d i:%d m:%d\n",
1316 			s->p0.phy_id, s->p0.link_active, s->p0.gap_count,
1317 			s->p0.phy_speed, s->p0.contender,
1318 			s->p0.power_class, s->p0.port0, s->p0.port1,
1319 			s->p0.port2, s->p0.initiated_reset, s->p0.more_packets);
1320 	}
1321 }
1322 
1323 /*
1324  * To receive self ID.
1325  */
1326 void fw_sidrcv(struct firewire_comm* fc, uint32_t *sid, u_int len)
1327 {
1328 	uint32_t *p;
1329 	union fw_self_id *self_id;
1330 	u_int i, j, node, c_port = 0, i_branch = 0;
1331 
1332 	fc->sid_cnt = len /(sizeof(uint32_t) * 2);
1333 	fc->max_node = fc->nodeid & 0x3f;
1334 	CSRARC(fc, NODE_IDS) = ((uint32_t)fc->nodeid) << 16;
1335 	fc->status = FWBUSCYMELECT;
1336 	fc->topology_map->crc_len = 2;
1337 	fc->topology_map->generation ++;
1338 	fc->topology_map->self_id_count = 0;
1339 	fc->topology_map->node_count = 0;
1340 	fc->speed_map->generation ++;
1341 	fc->speed_map->crc_len = 1 + (64*64 + 3) / 4;
1342 	self_id = &fc->topology_map->self_id[0];
1343 	for(i = 0; i < fc->sid_cnt; i ++){
1344 		if (sid[1] != ~sid[0]) {
1345 			device_printf(fc->bdev, "%s: ERROR invalid self-id packet\n",
1346 						__func__);
1347 			sid += 2;
1348 			continue;
1349 		}
1350 		*self_id = *((union fw_self_id *)sid);
1351 		fc->topology_map->crc_len++;
1352 		if(self_id->p0.sequel == 0){
1353 			fc->topology_map->node_count ++;
1354 			c_port = 0;
1355 			if (firewire_debug)
1356 				fw_print_sid(sid[0]);
1357 			node = self_id->p0.phy_id;
1358 			if(fc->max_node < node){
1359 				fc->max_node = self_id->p0.phy_id;
1360 			}
1361 			/* XXX I'm not sure this is the right speed_map */
1362 			fc->speed_map->speed[node][node]
1363 					= self_id->p0.phy_speed;
1364 			for (j = 0; j < node; j ++) {
1365 				fc->speed_map->speed[j][node]
1366 					= fc->speed_map->speed[node][j]
1367 					= min(fc->speed_map->speed[j][j],
1368 							self_id->p0.phy_speed);
1369 			}
1370 			if ((fc->irm == -1 || self_id->p0.phy_id > fc->irm) &&
1371 			  (self_id->p0.link_active && self_id->p0.contender)) {
1372 				fc->irm = self_id->p0.phy_id;
1373 			}
1374 			if(self_id->p0.port0 >= 0x2){
1375 				c_port++;
1376 			}
1377 			if(self_id->p0.port1 >= 0x2){
1378 				c_port++;
1379 			}
1380 			if(self_id->p0.port2 >= 0x2){
1381 				c_port++;
1382 			}
1383 		}
1384 		if(c_port > 2){
1385 			i_branch += (c_port - 2);
1386 		}
1387 		sid += 2;
1388 		self_id++;
1389 		fc->topology_map->self_id_count ++;
1390 	}
1391 	/* CRC */
1392 	fc->topology_map->crc = fw_crc16(
1393 			(uint32_t *)&fc->topology_map->generation,
1394 			fc->topology_map->crc_len * 4);
1395 	fc->speed_map->crc = fw_crc16(
1396 			(uint32_t *)&fc->speed_map->generation,
1397 			fc->speed_map->crc_len * 4);
1398 	/* byteswap and copy to CSR */
1399 	p = (uint32_t *)fc->topology_map;
1400 	for (i = 0; i <= fc->topology_map->crc_len; i++)
1401 		CSRARC(fc, TOPO_MAP + i * 4) = htonl(*p++);
1402 	p = (uint32_t *)fc->speed_map;
1403 	CSRARC(fc, SPED_MAP) = htonl(*p++);
1404 	CSRARC(fc, SPED_MAP + 4) = htonl(*p++);
1405 	/* don't byte-swap uint8_t array */
1406 	bcopy(p, &CSRARC(fc, SPED_MAP + 8), (fc->speed_map->crc_len - 1)*4);
1407 
1408 	fc->max_hop = fc->max_node - i_branch;
1409 	device_printf(fc->bdev, "%d nodes, maxhop <= %d %s irm(%d) %s\n",
1410 			fc->max_node + 1, fc->max_hop,
1411 			(fc->irm == -1) ? "Not IRM capable" : "cable IRM",
1412 			fc->irm,
1413 			(fc->irm == fc->nodeid) ? " (me) " : "");
1414 
1415 	if (try_bmr && (fc->irm != -1) && (CSRARC(fc, BUS_MGR_ID) == 0x3f)) {
1416 		if (fc->irm == fc->nodeid) {
1417 			fc->status = FWBUSMGRDONE;
1418 			CSRARC(fc, BUS_MGR_ID) = fc->set_bmr(fc, fc->irm);
1419 			fw_bmr(fc);
1420 		} else {
1421 			fc->status = FWBUSMGRELECT;
1422 			callout_reset(&fc->bmr_callout, hz/8,
1423 				(void *)fw_try_bmr, (void *)fc);
1424 		}
1425 	} else
1426 		fc->status = FWBUSMGRDONE;
1427 
1428 	callout_reset(&fc->busprobe_callout, hz/4,
1429 			(void *)fw_bus_probe, (void *)fc);
1430 }
1431 
1432 /*
1433  * To probe devices on the IEEE1394 bus.
1434  */
1435 static void
1436 fw_bus_probe(struct firewire_comm *fc)
1437 {
1438 	int s;
1439 	struct fw_device *fwdev;
1440 
1441 	s = splfw();
1442 	fc->status = FWBUSEXPLORE;
1443 
1444 	/* Invalidate all devices, just after bus reset. */
1445 	if (firewire_debug)
1446 		device_printf(fc->bdev, "%s:"
1447 			"iterate and invalidate all nodes\n",
1448 			__func__);
1449 	STAILQ_FOREACH(fwdev, &fc->devices, link)
1450 		if (fwdev->status != FWDEVINVAL) {
1451 			fwdev->status = FWDEVINVAL;
1452 			fwdev->rcnt = 0;
1453 			if (firewire_debug)
1454 				device_printf(fc->bdev, "%s:"
1455 					"Invalidate Dev ID: %08x%08x\n",
1456 					__func__, fwdev->eui.hi, fwdev->eui.lo);
1457 		} else {
1458 			if (firewire_debug)
1459 				device_printf(fc->bdev, "%s:"
1460 					"Dev ID: %08x%08x already invalid\n",
1461 					__func__, fwdev->eui.hi, fwdev->eui.lo);
1462 		}
1463 	splx(s);
1464 
1465 	wakeup((void *)fc);
1466 }
1467 
1468 static int
1469 fw_explore_read_quads(struct fw_device *fwdev, int offset,
1470     uint32_t *quad, int length)
1471 {
1472 	struct fw_xfer *xfer;
1473 	uint32_t tmp;
1474 	int i, error;
1475 
1476 	for (i = 0; i < length; i ++, offset += sizeof(uint32_t)) {
1477 		xfer = fwmem_read_quad(fwdev, NULL, -1,
1478 		    0xffff, 0xf0000000 | offset, (void *)&tmp,
1479 		    fw_xferwake);
1480 		if (xfer == NULL)
1481 			return (-1);
1482 		fw_xferwait(xfer);
1483 
1484 		if (xfer->resp == 0)
1485 			quad[i] = ntohl(tmp);
1486 
1487 		error = xfer->resp;
1488 		fw_xfer_free(xfer);
1489 		if (error)
1490 			return (error);
1491 	}
1492 	return (0);
1493 }
1494 
1495 
1496 static int
1497 fw_explore_csrblock(struct fw_device *fwdev, int offset, int recur)
1498 {
1499 	int err, i, off;
1500 	struct csrdirectory *dir;
1501 	struct csrreg *reg;
1502 
1503 	dir = (struct csrdirectory *)&fwdev->csrrom[offset/sizeof(uint32_t)];
1504 	err = fw_explore_read_quads(fwdev, CSRROMOFF + offset,
1505 	    (uint32_t *)dir, 1);
1506 	if (err)
1507 		return (-1);
1508 
1509 	offset += sizeof(uint32_t);
1510 	reg = (struct csrreg *)&fwdev->csrrom[offset/sizeof(uint32_t)];
1511 	err = fw_explore_read_quads(fwdev, CSRROMOFF + offset,
1512 	    (uint32_t *)reg, dir->crc_len);
1513 	if (err)
1514 		return (-1);
1515 
1516 	/* XXX check CRC */
1517 
1518 	off = CSRROMOFF + offset + sizeof(uint32_t) * (dir->crc_len - 1);
1519 	if (fwdev->rommax < off)
1520 		fwdev->rommax = off;
1521 
1522 	if (recur == 0)
1523 		return (0);
1524 
1525 	for (i = 0; i < dir->crc_len; i ++, offset += sizeof(uint32_t)) {
1526 		if ((reg[i].key & CSRTYPE_MASK) == CSRTYPE_D)
1527 			recur = 1;
1528 		else if ((reg[i].key & CSRTYPE_MASK) == CSRTYPE_L)
1529 			recur = 0;
1530 		else
1531 			continue;
1532 
1533 		off = offset + reg[i].val * sizeof(uint32_t);
1534 		if (off > CROMSIZE) {
1535 			printf("%s: invalid offset %d\n", __FUNCTION__, off);
1536 			return(-1);
1537 		}
1538 		err = fw_explore_csrblock(fwdev, off, recur);
1539 		if (err)
1540 			return (-1);
1541 	}
1542 	return (0);
1543 }
1544 
1545 static int
1546 fw_explore_node(struct fw_device *dfwdev)
1547 {
1548 	struct firewire_comm *fc;
1549 	struct fw_device *fwdev, *pfwdev, *tfwdev;
1550 	uint32_t *csr;
1551 	struct csrhdr *hdr;
1552 	struct bus_info *binfo;
1553 	int err, node;
1554 	uint32_t speed_test = 0;
1555 
1556 	fc = dfwdev->fc;
1557 	csr = dfwdev->csrrom;
1558 	node = dfwdev->dst;
1559 
1560 	/* First quad */
1561 	err = fw_explore_read_quads(dfwdev, CSRROMOFF, &csr[0], 1);
1562 	if (err) {
1563 		device_printf(fc->bdev, "%s: node%d: explore_read_quads failure\n",
1564 		    __func__, node);
1565 		dfwdev->status = FWDEVINVAL;
1566 		return (-1);
1567 	}
1568 	hdr = (struct csrhdr *)&csr[0];
1569 	if (hdr->info_len != 4) {
1570 		if (firewire_debug)
1571 			device_printf(fc->bdev, "%s: node%d: wrong bus info len(%d)\n",
1572 			    __func__, node, hdr->info_len);
1573 		dfwdev->status = FWDEVINVAL;
1574 		return (-1);
1575 	}
1576 
1577 	/* bus info */
1578 	err = fw_explore_read_quads(dfwdev, CSRROMOFF + 0x04, &csr[1], 4);
1579 	if (err) {
1580 		device_printf(fc->bdev, "%s: node%d: error reading 0x04\n",
1581 		    __func__, node);
1582 		dfwdev->status = FWDEVINVAL;
1583 		return (-1);
1584 	}
1585 	binfo = (struct bus_info *)&csr[1];
1586 	if (binfo->bus_name != CSR_BUS_NAME_IEEE1394) {
1587 		device_printf(fc->bdev, "%s: node%d: invalid bus name 0x%08x\n",
1588 		    __func__, node, binfo->bus_name);
1589 		dfwdev->status = FWDEVINVAL;
1590 		return (-1);
1591 	}
1592 
1593 	if (firewire_debug)
1594 		device_printf(fc->bdev, "%s: node(%d) BUS INFO BLOCK:\n"
1595 					"irmc(%d) cmc(%d) isc(%d) bmc(%d) pmc(%d) "
1596 					"cyc_clk_acc(%d) max_rec(%d) max_rom(%d) "
1597 					"generation(%d) link_spd(%d)\n",
1598 					__func__, node,
1599 					binfo->irmc, binfo->cmc, binfo->isc,
1600 					binfo->bmc, binfo->pmc, binfo->cyc_clk_acc,
1601 					binfo->max_rec, binfo->max_rom,
1602 					binfo->generation, binfo->link_spd);
1603 
1604 	STAILQ_FOREACH(fwdev, &fc->devices, link)
1605 		if (FW_EUI64_EQUAL(fwdev->eui, binfo->eui64))
1606 			break;
1607 	if (fwdev == NULL) {
1608 		/* new device */
1609 		fwdev = malloc(sizeof(struct fw_device), M_FW,
1610 						M_NOWAIT | M_ZERO);
1611 		if (fwdev == NULL) {
1612 			device_printf(fc->bdev, "%s: node%d: no memory\n",
1613 					__func__, node);
1614 			return (-1);
1615 		}
1616 		fwdev->fc = fc;
1617 		fwdev->eui = binfo->eui64;
1618 		fwdev->dst = dfwdev->dst;
1619 		fwdev->maxrec = dfwdev->maxrec;
1620 		fwdev->status = dfwdev->status;
1621 
1622 		/*
1623 		 * Pre-1394a-2000 didn't have link_spd in
1624 		 * the Bus Info block, so try and use the
1625 		 * speed map value.
1626 		 * 1394a-2000 compliant devices only use
1627 		 * the Bus Info Block link spd value, so
1628 		 * ignore the speed map alltogether. SWB
1629 		 */
1630 		if ( binfo->link_spd == FWSPD_S100 /* 0 */) {
1631 			device_printf(fc->bdev, "%s: "
1632 				"Pre 1394a-2000 detected\n",
1633 				__func__);
1634 			fwdev->speed = fc->speed_map->speed[fc->nodeid][node];
1635 		} else
1636 			fwdev->speed = binfo->link_spd;
1637 		/*
1638 		 * Test this speed with a read to the CSRROM.
1639 		 * If it fails, slow down the speed and retry.
1640 		 */
1641 		while (fwdev->speed > FWSPD_S100 /* 0 */) {
1642 			err = fw_explore_read_quads(fwdev, CSRROMOFF,
1643             				&speed_test, 1);
1644 			if (err) {
1645 				device_printf(fc->bdev, "%s: fwdev->speed(%s)"
1646 						" decremented due to negotiation\n",
1647 						__func__,
1648 						linkspeed[fwdev->speed]);
1649 				fwdev->speed--;
1650 			} else
1651 				break;
1652 
1653 		}
1654 
1655 		/*
1656 		 * If the fwdev is not found in the
1657 		 * fc->devices TAILQ, then we will add it.
1658 		 */
1659 		pfwdev = NULL;
1660 		STAILQ_FOREACH(tfwdev, &fc->devices, link) {
1661 			if (tfwdev->eui.hi > fwdev->eui.hi ||
1662 				(tfwdev->eui.hi == fwdev->eui.hi &&
1663 				tfwdev->eui.lo > fwdev->eui.lo))
1664 				break;
1665 			pfwdev = tfwdev;
1666 		}
1667 		if (pfwdev == NULL)
1668 			STAILQ_INSERT_HEAD(&fc->devices, fwdev, link);
1669 		else
1670 			STAILQ_INSERT_AFTER(&fc->devices, pfwdev, fwdev, link);
1671 
1672 		device_printf(fc->bdev, "New %s device ID:%08x%08x\n",
1673 		    linkspeed[fwdev->speed],
1674 		    fwdev->eui.hi, fwdev->eui.lo);
1675 	} else {
1676 		fwdev->dst = node;
1677 		fwdev->status = FWDEVINIT;
1678 		/* unchanged ? */
1679 		if (bcmp(&csr[0], &fwdev->csrrom[0], sizeof(uint32_t) * 5) == 0) {
1680 			if (firewire_debug)
1681 				device_printf(fc->dev, "node%d: crom unchanged\n", node);
1682 			return (0);
1683 		}
1684 	}
1685 
1686 	bzero(&fwdev->csrrom[0], CROMSIZE);
1687 
1688 	/* copy first quad and bus info block */
1689 	bcopy(&csr[0], &fwdev->csrrom[0], sizeof(uint32_t) * 5);
1690 	fwdev->rommax = CSRROMOFF + sizeof(uint32_t) * 4;
1691 
1692 	err = fw_explore_csrblock(fwdev, 0x14, 1); /* root directory */
1693 
1694 	if (err) {
1695 		if (firewire_debug)
1696 			device_printf(fc->dev, "%s: explore csrblock failed err(%d)\n",
1697 					__func__, err);
1698 		fwdev->status = FWDEVINVAL;
1699 		fwdev->csrrom[0] = 0;
1700 	}
1701 	return (err);
1702 
1703 }
1704 
1705 /*
1706  * Find the self_id packet for a node, ignoring sequels.
1707  */
1708 static union fw_self_id *
1709 fw_find_self_id(struct firewire_comm *fc, int node)
1710 {
1711 	uint32_t i;
1712 	union fw_self_id *s;
1713 
1714 	for (i = 0; i < fc->topology_map->self_id_count; i++) {
1715 		s = &fc->topology_map->self_id[i];
1716 		if (s->p0.sequel)
1717 			continue;
1718 		if (s->p0.phy_id == node)
1719 			return s;
1720 	}
1721 	return 0;
1722 }
1723 
1724 static void
1725 fw_explore(struct firewire_comm *fc)
1726 {
1727 	int node, err, s, i, todo, todo2, trys;
1728 	char nodes[63];
1729 	struct fw_device dfwdev;
1730 	union fw_self_id *fwsid;
1731 
1732 	todo = 0;
1733 	/* setup dummy fwdev */
1734 	dfwdev.fc = fc;
1735 	dfwdev.speed = 0;
1736 	dfwdev.maxrec = 8; /* 512 */
1737 	dfwdev.status = FWDEVINIT;
1738 
1739 	for (node = 0; node <= fc->max_node; node ++) {
1740 		/* We don't probe myself and linkdown nodes */
1741 		if (node == fc->nodeid) {
1742 			if (firewire_debug)
1743 				device_printf(fc->bdev, "%s:"
1744 					"found myself node(%d) fc->nodeid(%d) fc->max_node(%d)\n",
1745 					__func__, node, fc->nodeid, fc->max_node);
1746 			continue;
1747 		} else if (firewire_debug) {
1748 			device_printf(fc->bdev, "%s:"
1749 				"node(%d) fc->max_node(%d) found\n",
1750 				__func__, node, fc->max_node);
1751 		}
1752 		fwsid = fw_find_self_id(fc, node);
1753 		if (!fwsid || !fwsid->p0.link_active) {
1754 			if (firewire_debug)
1755 				device_printf(fc->bdev, "%s: node%d: link down\n",
1756 							__func__, node);
1757 			continue;
1758 		}
1759 		nodes[todo++] = node;
1760 	}
1761 
1762 	s = splfw();
1763 	for (trys = 0; todo > 0 && trys < 3; trys ++) {
1764 		todo2 = 0;
1765 		for (i = 0; i < todo; i ++) {
1766 			dfwdev.dst = nodes[i];
1767 			err = fw_explore_node(&dfwdev);
1768 			if (err)
1769 				nodes[todo2++] = nodes[i];
1770 			if (firewire_debug)
1771 				device_printf(fc->bdev, "%s: node %d, err = %d\n",
1772 					__func__, node, err);
1773 		}
1774 		todo = todo2;
1775 	}
1776 	splx(s);
1777 }
1778 
1779 
1780 static void
1781 fw_bus_probe_thread(void *arg)
1782 {
1783 	struct firewire_comm *fc;
1784 
1785 	fc = (struct firewire_comm *)arg;
1786 
1787 	mtx_lock(&fc->wait_lock);
1788 	while (fc->status != FWBUSDETACH) {
1789 		if (fc->status == FWBUSEXPLORE) {
1790 			mtx_unlock(&fc->wait_lock);
1791 			fw_explore(fc);
1792 			fc->status = FWBUSEXPDONE;
1793 			if (firewire_debug)
1794 				printf("bus_explore done\n");
1795 			fw_attach_dev(fc);
1796 			mtx_lock(&fc->wait_lock);
1797 		}
1798 		msleep((void *)fc, &fc->wait_lock, PWAIT|PCATCH, "-", 0);
1799 	}
1800 	mtx_unlock(&fc->wait_lock);
1801 	kproc_exit(0);
1802 }
1803 
1804 /*
1805  * To attach sub-devices layer onto IEEE1394 bus.
1806  */
1807 static void
1808 fw_attach_dev(struct firewire_comm *fc)
1809 {
1810 	struct fw_device *fwdev, *next;
1811 	int i, err;
1812 	device_t *devlistp;
1813 	int devcnt;
1814 	struct firewire_dev_comm *fdc;
1815 
1816 	for (fwdev = STAILQ_FIRST(&fc->devices); fwdev != NULL; fwdev = next) {
1817 		next = STAILQ_NEXT(fwdev, link);
1818 		if (fwdev->status == FWDEVINIT) {
1819 			fwdev->status = FWDEVATTACHED;
1820 		} else if (fwdev->status == FWDEVINVAL) {
1821 			fwdev->rcnt ++;
1822 			if (firewire_debug)
1823 				device_printf(fc->bdev, "%s:"
1824 					"fwdev->rcnt(%d), hold_count(%d)\n",
1825 					__func__, fwdev->rcnt, hold_count);
1826 			if (fwdev->rcnt > hold_count) {
1827 				/*
1828 				 * Remove devices which have not been seen
1829 				 * for a while.
1830 				 */
1831 				device_printf(fc->bdev, "%s:"
1832 					"Removing missing device ID:%08x%08x\n",
1833 					__func__, fwdev->eui.hi, fwdev->eui.lo);
1834 				STAILQ_REMOVE(&fc->devices, fwdev, fw_device,
1835 				    link);
1836 				free(fwdev, M_FW);
1837 			}
1838 		}
1839 	}
1840 
1841 	err = device_get_children(fc->bdev, &devlistp, &devcnt);
1842 	if( err == 0 ) {
1843 		for( i = 0 ; i < devcnt ; i++){
1844 			if (device_get_state(devlistp[i]) >= DS_ATTACHED)  {
1845 				fdc = device_get_softc(devlistp[i]);
1846 				if (fdc->post_explore != NULL)
1847 					fdc->post_explore(fdc);
1848 			}
1849 		}
1850 		free(devlistp, M_TEMP);
1851 	}
1852 
1853 	return;
1854 }
1855 
1856 /*
1857  * To allocate unique transaction label.
1858  */
1859 static int
1860 fw_get_tlabel(struct firewire_comm *fc, struct fw_xfer *xfer)
1861 {
1862 	u_int dst, new_tlabel;
1863 	struct fw_xfer *txfer;
1864 	int s;
1865 
1866 	dst = xfer->send.hdr.mode.hdr.dst & 0x3f;
1867 	s = splfw();
1868 	mtx_lock(&fc->tlabel_lock);
1869 	new_tlabel = (fc->last_tlabel[dst] + 1) & 0x3f;
1870 	STAILQ_FOREACH(txfer, &fc->tlabels[new_tlabel], tlabel)
1871 		if ((txfer->send.hdr.mode.hdr.dst & 0x3f) == dst)
1872 				break;
1873 	if(txfer == NULL) {
1874 		fc->last_tlabel[dst] = new_tlabel;
1875 		STAILQ_INSERT_TAIL(&fc->tlabels[new_tlabel], xfer, tlabel);
1876 		mtx_unlock(&fc->tlabel_lock);
1877 		splx(s);
1878 		xfer->tl = new_tlabel;
1879 		xfer->send.hdr.mode.hdr.tlrt = new_tlabel << 2;
1880 		if (firewire_debug > 1)
1881 			printf("fw_get_tlabel: dst=%d tl=%d\n", dst, new_tlabel);
1882 		return (new_tlabel);
1883 	}
1884 	mtx_unlock(&fc->tlabel_lock);
1885 	splx(s);
1886 
1887 	if (firewire_debug > 1)
1888 		printf("fw_get_tlabel: no free tlabel\n");
1889 	return (-1);
1890 }
1891 
1892 static void
1893 fw_rcv_copy(struct fw_rcv_buf *rb)
1894 {
1895 	struct fw_pkt *pkt;
1896 	u_char *p;
1897 	struct tcode_info *tinfo;
1898 	u_int res, i, len, plen;
1899 
1900 	rb->xfer->recv.spd = rb->spd;
1901 
1902 	pkt = (struct fw_pkt *)rb->vec->iov_base;
1903 	tinfo = &rb->fc->tcode[pkt->mode.hdr.tcode];
1904 
1905 	/* Copy header */
1906 	p = (u_char *)&rb->xfer->recv.hdr;
1907 	bcopy(rb->vec->iov_base, p, tinfo->hdr_len);
1908 	rb->vec->iov_base = (u_char *)rb->vec->iov_base + tinfo->hdr_len;
1909 	rb->vec->iov_len -= tinfo->hdr_len;
1910 
1911 	/* Copy payload */
1912 	p = (u_char *)rb->xfer->recv.payload;
1913 	res = rb->xfer->recv.pay_len;
1914 
1915 	/* special handling for RRESQ */
1916 	if (pkt->mode.hdr.tcode == FWTCODE_RRESQ &&
1917 	    p != NULL && res >= sizeof(uint32_t)) {
1918 		*(uint32_t *)p = pkt->mode.rresq.data;
1919 		rb->xfer->recv.pay_len = sizeof(uint32_t);
1920 		return;
1921 	}
1922 
1923 	if ((tinfo->flag & FWTI_BLOCK_ASY) == 0)
1924 		return;
1925 
1926 	plen = pkt->mode.rresb.len;
1927 
1928 	for (i = 0; i < rb->nvec; i++, rb->vec++) {
1929 		len = MIN(rb->vec->iov_len, plen);
1930 		if (res < len) {
1931 			device_printf(rb->fc->bdev, "%s:"
1932 				" rcv buffer(%d) is %d bytes short.\n",
1933 				__func__, rb->xfer->recv.pay_len, len - res);
1934 			len = res;
1935 		}
1936 		bcopy(rb->vec->iov_base, p, len);
1937 		p += len;
1938 		res -= len;
1939 		plen -= len;
1940 		if (res == 0 || plen == 0)
1941 			break;
1942 	}
1943 	rb->xfer->recv.pay_len -= res;
1944 
1945 }
1946 
1947 /*
1948  * Generic packet receiving process.
1949  */
1950 void
1951 fw_rcv(struct fw_rcv_buf *rb)
1952 {
1953 	struct fw_pkt *fp, *resfp;
1954 	struct fw_bind *bind;
1955 	int tcode;
1956 	int i, len, oldstate;
1957 #if 0
1958 	{
1959 		uint32_t *qld;
1960 		int i;
1961 		qld = (uint32_t *)buf;
1962 		printf("spd %d len:%d\n", spd, len);
1963 		for( i = 0 ; i <= len && i < 32; i+= 4){
1964 			printf("0x%08x ", ntohl(qld[i/4]));
1965 			if((i % 16) == 15) printf("\n");
1966 		}
1967 		if((i % 16) != 15) printf("\n");
1968 	}
1969 #endif
1970 	fp = (struct fw_pkt *)rb->vec[0].iov_base;
1971 	tcode = fp->mode.common.tcode;
1972 	switch (tcode) {
1973 	case FWTCODE_WRES:
1974 	case FWTCODE_RRESQ:
1975 	case FWTCODE_RRESB:
1976 	case FWTCODE_LRES:
1977 		rb->xfer = fw_tl2xfer(rb->fc, fp->mode.hdr.src,
1978 				fp->mode.hdr.tlrt >> 2, fp->mode.hdr.tcode);
1979 		if(rb->xfer == NULL) {
1980 			device_printf(rb->fc->bdev, "%s: "
1981 				"unknown response "
1982 			    	"%s(%x) src=0x%x tl=0x%x rt=%d data=0x%x\n",
1983 				__func__,
1984 			    	tcode_str[tcode], tcode,
1985 				fp->mode.hdr.src,
1986 				fp->mode.hdr.tlrt >> 2,
1987 				fp->mode.hdr.tlrt & 3,
1988 				fp->mode.rresq.data);
1989 #if 0
1990 			printf("try ad-hoc work around!!\n");
1991 			rb->xfer = fw_tl2xfer(rb->fc, fp->mode.hdr.src,
1992 					(fp->mode.hdr.tlrt >> 2)^3);
1993 			if (rb->xfer == NULL) {
1994 				printf("no use...\n");
1995 				return;
1996 			}
1997 #else
1998 			return;
1999 #endif
2000 		}
2001 		fw_rcv_copy(rb);
2002 		if (rb->xfer->recv.hdr.mode.wres.rtcode != RESP_CMP)
2003 			rb->xfer->resp = EIO;
2004 		else
2005 			rb->xfer->resp = 0;
2006 		/* make sure the packet is drained in AT queue */
2007 		oldstate = rb->xfer->flag;
2008 		rb->xfer->flag = FWXF_RCVD;
2009 		switch (oldstate) {
2010 		case FWXF_SENT:
2011 			fw_xfer_done(rb->xfer);
2012 			break;
2013 		case FWXF_START:
2014 #if 0
2015 			if (firewire_debug)
2016 				printf("not sent yet tl=%x\n", rb->xfer->tl);
2017 #endif
2018 			break;
2019 		default:
2020 			device_printf(rb->fc->bdev, "%s: "
2021 				"unexpected flag 0x%02x\n", __func__, rb->xfer->flag);
2022 		}
2023 		return;
2024 	case FWTCODE_WREQQ:
2025 	case FWTCODE_WREQB:
2026 	case FWTCODE_RREQQ:
2027 	case FWTCODE_RREQB:
2028 	case FWTCODE_LREQ:
2029 		bind = fw_bindlookup(rb->fc, fp->mode.rreqq.dest_hi,
2030 			fp->mode.rreqq.dest_lo);
2031 		if(bind == NULL){
2032 			device_printf(rb->fc->bdev, "%s: "
2033 				"Unknown service addr 0x%04x:0x%08x %s(%x)"
2034 #if defined(__DragonFly__) || __FreeBSD_version < 500000
2035 				" src=0x%x data=%lx\n",
2036 #else
2037 				" src=0x%x data=%x\n",
2038 #endif
2039 				__func__,
2040 				fp->mode.wreqq.dest_hi,
2041 				fp->mode.wreqq.dest_lo,
2042 				tcode_str[tcode], tcode,
2043 				fp->mode.hdr.src,
2044 				ntohl(fp->mode.wreqq.data));
2045 
2046 			if (rb->fc->status == FWBUSINIT) {
2047 				device_printf(rb->fc->bdev, "%s: cannot respond(bus reset)!\n",
2048 						__func__);
2049 				return;
2050 			}
2051 			rb->xfer = fw_xfer_alloc(M_FWXFER);
2052 			if(rb->xfer == NULL){
2053 				return;
2054 			}
2055 			rb->xfer->send.spd = rb->spd;
2056 			rb->xfer->send.pay_len = 0;
2057 			resfp = &rb->xfer->send.hdr;
2058 			switch (tcode) {
2059 			case FWTCODE_WREQQ:
2060 			case FWTCODE_WREQB:
2061 				resfp->mode.hdr.tcode = FWTCODE_WRES;
2062 				break;
2063 			case FWTCODE_RREQQ:
2064 				resfp->mode.hdr.tcode = FWTCODE_RRESQ;
2065 				break;
2066 			case FWTCODE_RREQB:
2067 				resfp->mode.hdr.tcode = FWTCODE_RRESB;
2068 				break;
2069 			case FWTCODE_LREQ:
2070 				resfp->mode.hdr.tcode = FWTCODE_LRES;
2071 				break;
2072 			}
2073 			resfp->mode.hdr.dst = fp->mode.hdr.src;
2074 			resfp->mode.hdr.tlrt = fp->mode.hdr.tlrt;
2075 			resfp->mode.hdr.pri = fp->mode.hdr.pri;
2076 			resfp->mode.rresb.rtcode = RESP_ADDRESS_ERROR;
2077 			resfp->mode.rresb.extcode = 0;
2078 			resfp->mode.rresb.len = 0;
2079 /*
2080 			rb->xfer->hand = fw_xferwake;
2081 */
2082 			rb->xfer->hand = fw_xfer_free;
2083 			if(fw_asyreq(rb->fc, -1, rb->xfer)){
2084 				fw_xfer_free(rb->xfer);
2085 				return;
2086 			}
2087 			return;
2088 		}
2089 		len = 0;
2090 		for (i = 0; i < rb->nvec; i ++)
2091 			len += rb->vec[i].iov_len;
2092 		rb->xfer = STAILQ_FIRST(&bind->xferlist);
2093 		if (rb->xfer == NULL) {
2094 			device_printf(rb->fc->bdev, "%s: "
2095 				"Discard a packet for this bind.\n",
2096 				__func__);
2097 			return;
2098 		}
2099 		STAILQ_REMOVE_HEAD(&bind->xferlist, link);
2100 		fw_rcv_copy(rb);
2101 		rb->xfer->hand(rb->xfer);
2102 		return;
2103 #if 0 /* shouldn't happen ?? or for GASP */
2104 	case FWTCODE_STREAM:
2105 	{
2106 		struct fw_xferq *xferq;
2107 
2108 		xferq = rb->fc->ir[sub];
2109 #if 0
2110 		printf("stream rcv dma %d len %d off %d spd %d\n",
2111 			sub, len, off, spd);
2112 #endif
2113 		if(xferq->queued >= xferq->maxq) {
2114 			printf("receive queue is full\n");
2115 			return;
2116 		}
2117 		/* XXX get xfer from xfer queue, we don't need copy for
2118 			per packet mode */
2119 		rb->xfer = fw_xfer_alloc_buf(M_FWXFER, 0, /* XXX */
2120 						vec[0].iov_len);
2121 		if (rb->xfer == NULL)
2122 			return;
2123 		fw_rcv_copy(rb)
2124 		s = splfw();
2125 		xferq->queued++;
2126 		STAILQ_INSERT_TAIL(&xferq->q, rb->xfer, link);
2127 		splx(s);
2128 		sc = device_get_softc(rb->fc->bdev);
2129 #if defined(__DragonFly__) || __FreeBSD_version < 500000
2130 		if (&xferq->rsel.si_pid != 0)
2131 #else
2132 		if (SEL_WAITING(&xferq->rsel))
2133 #endif
2134 			selwakeuppri(&xferq->rsel, FWPRI);
2135 		if (xferq->flag & FWXFERQ_WAKEUP) {
2136 			xferq->flag &= ~FWXFERQ_WAKEUP;
2137 			wakeup((caddr_t)xferq);
2138 		}
2139 		if (xferq->flag & FWXFERQ_HANDLER) {
2140 			xferq->hand(xferq);
2141 		}
2142 		return;
2143 		break;
2144 	}
2145 #endif
2146 	default:
2147 		device_printf(rb->fc->bdev,"%s: unknown tcode %d\n",
2148 				__func__, tcode);
2149 		break;
2150 	}
2151 }
2152 
2153 /*
2154  * Post process for Bus Manager election process.
2155  */
2156 static void
2157 fw_try_bmr_callback(struct fw_xfer *xfer)
2158 {
2159 	struct firewire_comm *fc;
2160 	int bmr;
2161 
2162 	if (xfer == NULL)
2163 		return;
2164 	fc = xfer->fc;
2165 	if (xfer->resp != 0)
2166 		goto error;
2167 	if (xfer->recv.payload == NULL)
2168 		goto error;
2169 	if (xfer->recv.hdr.mode.lres.rtcode != FWRCODE_COMPLETE)
2170 		goto error;
2171 
2172 	bmr = ntohl(xfer->recv.payload[0]);
2173 	if (bmr == 0x3f)
2174 		bmr = fc->nodeid;
2175 
2176 	CSRARC(fc, BUS_MGR_ID) = fc->set_bmr(fc, bmr & 0x3f);
2177 	fw_xfer_free_buf(xfer);
2178 	fw_bmr(fc);
2179 	return;
2180 
2181 error:
2182 	device_printf(fc->bdev, "bus manager election failed\n");
2183 	fw_xfer_free_buf(xfer);
2184 }
2185 
2186 
2187 /*
2188  * To candidate Bus Manager election process.
2189  */
2190 static void
2191 fw_try_bmr(void *arg)
2192 {
2193 	struct fw_xfer *xfer;
2194 	struct firewire_comm *fc = (struct firewire_comm *)arg;
2195 	struct fw_pkt *fp;
2196 	int err = 0;
2197 
2198 	xfer = fw_xfer_alloc_buf(M_FWXFER, 8, 4);
2199 	if(xfer == NULL){
2200 		return;
2201 	}
2202 	xfer->send.spd = 0;
2203 	fc->status = FWBUSMGRELECT;
2204 
2205 	fp = &xfer->send.hdr;
2206 	fp->mode.lreq.dest_hi = 0xffff;
2207 	fp->mode.lreq.tlrt = 0;
2208 	fp->mode.lreq.tcode = FWTCODE_LREQ;
2209 	fp->mode.lreq.pri = 0;
2210 	fp->mode.lreq.src = 0;
2211 	fp->mode.lreq.len = 8;
2212 	fp->mode.lreq.extcode = EXTCODE_CMP_SWAP;
2213 	fp->mode.lreq.dst = FWLOCALBUS | fc->irm;
2214 	fp->mode.lreq.dest_lo = 0xf0000000 | BUS_MGR_ID;
2215 	xfer->send.payload[0] = htonl(0x3f);
2216 	xfer->send.payload[1] = htonl(fc->nodeid);
2217 	xfer->hand = fw_try_bmr_callback;
2218 
2219 	err = fw_asyreq(fc, -1, xfer);
2220 	if(err){
2221 		fw_xfer_free_buf(xfer);
2222 		return;
2223 	}
2224 	return;
2225 }
2226 
2227 #ifdef FW_VMACCESS
2228 /*
2229  * Software implementation for physical memory block access.
2230  * XXX:Too slow, usef for debug purpose only.
2231  */
2232 static void
2233 fw_vmaccess(struct fw_xfer *xfer){
2234 	struct fw_pkt *rfp, *sfp = NULL;
2235 	uint32_t *ld = (uint32_t *)xfer->recv.buf;
2236 
2237 	printf("vmaccess spd:%2x len:%03x data:%08x %08x %08x %08x\n",
2238 			xfer->spd, xfer->recv.len, ntohl(ld[0]), ntohl(ld[1]), ntohl(ld[2]), ntohl(ld[3]));
2239 	printf("vmaccess          data:%08x %08x %08x %08x\n", ntohl(ld[4]), ntohl(ld[5]), ntohl(ld[6]), ntohl(ld[7]));
2240 	if(xfer->resp != 0){
2241 		fw_xfer_free( xfer);
2242 		return;
2243 	}
2244 	if(xfer->recv.buf == NULL){
2245 		fw_xfer_free( xfer);
2246 		return;
2247 	}
2248 	rfp = (struct fw_pkt *)xfer->recv.buf;
2249 	switch(rfp->mode.hdr.tcode){
2250 		/* XXX need fix for 64bit arch */
2251 		case FWTCODE_WREQB:
2252 			xfer->send.buf = malloc(12, M_FW, M_NOWAIT);
2253 			xfer->send.len = 12;
2254 			sfp = (struct fw_pkt *)xfer->send.buf;
2255 			bcopy(rfp->mode.wreqb.payload,
2256 				(caddr_t)ntohl(rfp->mode.wreqb.dest_lo), ntohs(rfp->mode.wreqb.len));
2257 			sfp->mode.wres.tcode = FWTCODE_WRES;
2258 			sfp->mode.wres.rtcode = 0;
2259 			break;
2260 		case FWTCODE_WREQQ:
2261 			xfer->send.buf = malloc(12, M_FW, M_NOWAIT);
2262 			xfer->send.len = 12;
2263 			sfp->mode.wres.tcode = FWTCODE_WRES;
2264 			*((uint32_t *)(ntohl(rfp->mode.wreqb.dest_lo))) = rfp->mode.wreqq.data;
2265 			sfp->mode.wres.rtcode = 0;
2266 			break;
2267 		case FWTCODE_RREQB:
2268 			xfer->send.buf = malloc(16 + rfp->mode.rreqb.len, M_FW, M_NOWAIT);
2269 			xfer->send.len = 16 + ntohs(rfp->mode.rreqb.len);
2270 			sfp = (struct fw_pkt *)xfer->send.buf;
2271 			bcopy((caddr_t)ntohl(rfp->mode.rreqb.dest_lo),
2272 				sfp->mode.rresb.payload, (uint16_t)ntohs(rfp->mode.rreqb.len));
2273 			sfp->mode.rresb.tcode = FWTCODE_RRESB;
2274 			sfp->mode.rresb.len = rfp->mode.rreqb.len;
2275 			sfp->mode.rresb.rtcode = 0;
2276 			sfp->mode.rresb.extcode = 0;
2277 			break;
2278 		case FWTCODE_RREQQ:
2279 			xfer->send.buf = malloc(16, M_FW, M_NOWAIT);
2280 			xfer->send.len = 16;
2281 			sfp = (struct fw_pkt *)xfer->send.buf;
2282 			sfp->mode.rresq.data = *(uint32_t *)(ntohl(rfp->mode.rreqq.dest_lo));
2283 			sfp->mode.wres.tcode = FWTCODE_RRESQ;
2284 			sfp->mode.rresb.rtcode = 0;
2285 			break;
2286 		default:
2287 			fw_xfer_free( xfer);
2288 			return;
2289 	}
2290 	sfp->mode.hdr.dst = rfp->mode.hdr.src;
2291 	xfer->dst = ntohs(rfp->mode.hdr.src);
2292 	xfer->hand = fw_xfer_free;
2293 
2294 	sfp->mode.hdr.tlrt = rfp->mode.hdr.tlrt;
2295 	sfp->mode.hdr.pri = 0;
2296 
2297 	fw_asyreq(xfer->fc, -1, xfer);
2298 /**/
2299 	return;
2300 }
2301 #endif
2302 
2303 /*
2304  * CRC16 check-sum for IEEE1394 register blocks.
2305  */
2306 uint16_t
2307 fw_crc16(uint32_t *ptr, uint32_t len){
2308 	uint32_t i, sum, crc = 0;
2309 	int shift;
2310 	len = (len + 3) & ~3;
2311 	for(i = 0 ; i < len ; i+= 4){
2312 		for( shift = 28 ; shift >= 0 ; shift -= 4){
2313 			sum = ((crc >> 12) ^ (ptr[i/4] >> shift)) & 0xf;
2314 			crc = (crc << 4) ^ ( sum << 12 ) ^ ( sum << 5) ^ sum;
2315 		}
2316 		crc &= 0xffff;
2317 	}
2318 	return((uint16_t) crc);
2319 }
2320 
2321 /*
2322  * Find the root node, if it is not
2323  * Cycle Master Capable, then we should
2324  * override this and become the Cycle
2325  * Master
2326  */
2327 static int
2328 fw_bmr(struct firewire_comm *fc)
2329 {
2330 	struct fw_device fwdev;
2331 	union fw_self_id *self_id;
2332 	int cmstr;
2333 	uint32_t quad;
2334 
2335 	/* Check to see if the current root node is cycle master capable */
2336 	self_id = fw_find_self_id(fc, fc->max_node);
2337 	if (fc->max_node > 0) {
2338 		/* XXX check cmc bit of businfo block rather than contender */
2339 		if (self_id->p0.link_active && self_id->p0.contender)
2340 			cmstr = fc->max_node;
2341 		else {
2342 			device_printf(fc->bdev,
2343 				"root node is not cycle master capable\n");
2344 			/* XXX shall we be the cycle master? */
2345 			cmstr = fc->nodeid;
2346 			/* XXX need bus reset */
2347 		}
2348 	} else
2349 		cmstr = -1;
2350 
2351 	device_printf(fc->bdev, "bus manager %d %s\n",
2352 		CSRARC(fc, BUS_MGR_ID),
2353 		(CSRARC(fc, BUS_MGR_ID) != fc->nodeid) ? "(me)" : "");
2354 	if(CSRARC(fc, BUS_MGR_ID) != fc->nodeid) {
2355 		/* We are not the bus manager */
2356 		return(0);
2357 	}
2358 
2359 	/* Optimize gapcount */
2360 	if(fc->max_hop <= MAX_GAPHOP )
2361 		fw_phy_config(fc, cmstr, gap_cnt[fc->max_hop]);
2362 	/* If we are the cycle master, nothing to do */
2363 	if (cmstr == fc->nodeid || cmstr == -1)
2364 		return 0;
2365 	/* Bus probe has not finished, make dummy fwdev for cmstr */
2366 	bzero(&fwdev, sizeof(fwdev));
2367 	fwdev.fc = fc;
2368 	fwdev.dst = cmstr;
2369 	fwdev.speed = 0;
2370 	fwdev.maxrec = 8; /* 512 */
2371 	fwdev.status = FWDEVINIT;
2372 	/* Set cmstr bit on the cycle master */
2373 	quad = htonl(1 << 8);
2374 	fwmem_write_quad(&fwdev, NULL, 0/*spd*/,
2375 		0xffff, 0xf0000000 | STATE_SET, &quad, fw_asy_callback_free);
2376 
2377 	return 0;
2378 }
2379 
2380 int
2381 fw_open_isodma(struct firewire_comm *fc, int tx)
2382 {
2383 	struct fw_xferq **xferqa;
2384 	struct fw_xferq *xferq;
2385 	int i;
2386 
2387 	if (tx)
2388 		xferqa = &fc->it[0];
2389 	else
2390 		xferqa = &fc->ir[0];
2391 
2392 	FW_GLOCK(fc);
2393 	for (i = 0; i < fc->nisodma; i ++) {
2394 		xferq = xferqa[i];
2395 		if ((xferq->flag & FWXFERQ_OPEN) == 0) {
2396 			xferq->flag |= FWXFERQ_OPEN;
2397 			break;
2398 		}
2399 	}
2400 	if (i == fc->nisodma) {
2401 		printf("no free dma channel (tx=%d)\n", tx);
2402 		i = -1;
2403 	}
2404 	FW_GUNLOCK(fc);
2405 	return (i);
2406 }
2407 
2408 static int
2409 fw_modevent(module_t mode, int type, void *data)
2410 {
2411 	int err = 0;
2412 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
2413 	static eventhandler_tag fwdev_ehtag = NULL;
2414 #endif
2415 
2416 	switch (type) {
2417 	case MOD_LOAD:
2418 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
2419 		fwdev_ehtag = EVENTHANDLER_REGISTER(dev_clone,
2420 						fwdev_clone, 0, 1000);
2421 #endif
2422 		break;
2423 	case MOD_UNLOAD:
2424 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
2425 		if (fwdev_ehtag != NULL)
2426 			EVENTHANDLER_DEREGISTER(dev_clone, fwdev_ehtag);
2427 #endif
2428 		break;
2429 	case MOD_SHUTDOWN:
2430 		break;
2431 	default:
2432 		return (EOPNOTSUPP);
2433 	}
2434 	return (err);
2435 }
2436 
2437 
2438 #ifdef __DragonFly__
2439 DECLARE_DUMMY_MODULE(firewire);
2440 #endif
2441 DRIVER_MODULE(firewire,fwohci,firewire_driver,firewire_devclass,fw_modevent,0);
2442 MODULE_VERSION(firewire, 1);
2443