xref: /freebsd/sys/dev/firewire/if_fwe.c (revision d37ea99837e6ad50837fd9fe1771ddf1c3ba6002)
1 /*
2  * Copyright (c) 2002-2003
3  * 	Hidetoshi Shimokawa. All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  *
16  *	This product includes software developed by Hidetoshi Shimokawa.
17  *
18  * 4. Neither the name of the author nor the names of its contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  *
34  * $FreeBSD$
35  */
36 
37 #include "opt_inet.h"
38 
39 #include <sys/param.h>
40 #include <sys/kernel.h>
41 #include <sys/malloc.h>
42 #include <sys/mbuf.h>
43 #include <sys/socket.h>
44 #include <sys/sockio.h>
45 #include <sys/sysctl.h>
46 #include <sys/systm.h>
47 #include <sys/module.h>
48 #include <sys/bus.h>
49 #include <machine/bus.h>
50 
51 #include <net/bpf.h>
52 #include <net/ethernet.h>
53 #include <net/if.h>
54 #include <net/if_arp.h>
55 #ifdef __DragonFly__
56 #include <net/vlan/if_vlan_var.h>
57 #include <bus/firewire/firewire.h>
58 #include <bus/firewire/firewirereg.h>
59 #include "if_fwevar.h"
60 #else
61 #include <net/if_vlan_var.h>
62 
63 #include <dev/firewire/firewire.h>
64 #include <dev/firewire/firewirereg.h>
65 #include <dev/firewire/if_fwevar.h>
66 #endif
67 
68 #define FWEDEBUG	if (fwedebug) if_printf
69 #define TX_MAX_QUEUE	(FWMAXQUEUE - 1)
70 
71 /* network interface */
72 static void fwe_start (struct ifnet *);
73 static int fwe_ioctl (struct ifnet *, u_long, caddr_t);
74 static void fwe_init (void *);
75 
76 static void fwe_output_callback (struct fw_xfer *);
77 static void fwe_as_output (struct fwe_softc *, struct ifnet *);
78 static void fwe_as_input (struct fw_xferq *);
79 
80 static int fwedebug = 0;
81 static int stream_ch = 1;
82 static int tx_speed = 2;
83 static int rx_queue_len = FWMAXQUEUE;
84 
85 MALLOC_DEFINE(M_FWE, "if_fwe", "Ethernet over FireWire interface");
86 SYSCTL_INT(_debug, OID_AUTO, if_fwe_debug, CTLFLAG_RW, &fwedebug, 0, "");
87 SYSCTL_DECL(_hw_firewire);
88 SYSCTL_NODE(_hw_firewire, OID_AUTO, fwe, CTLFLAG_RD, 0,
89 	"Ethernet emulation subsystem");
90 SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, stream_ch, CTLFLAG_RW, &stream_ch, 0,
91 	"Stream channel to use");
92 SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, tx_speed, CTLFLAG_RW, &tx_speed, 0,
93 	"Transmission speed");
94 SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, rx_queue_len, CTLFLAG_RW, &rx_queue_len,
95 	0, "Length of the receive queue");
96 
97 TUNABLE_INT("hw.firewire.fwe.stream_ch", &stream_ch);
98 TUNABLE_INT("hw.firewire.fwe.tx_speed", &tx_speed);
99 TUNABLE_INT("hw.firewire.fwe.rx_queue_len", &rx_queue_len);
100 
101 #ifdef DEVICE_POLLING
102 #define FWE_POLL_REGISTER(func, fwe, ifp)			\
103 	if (ether_poll_register(func, ifp)) {			\
104 		struct firewire_comm *fc = (fwe)->fd.fc;	\
105 		fc->set_intr(fc, 0);				\
106 	}
107 
108 #define FWE_POLL_DEREGISTER(fwe, ifp)				\
109 	do {							\
110 		struct firewire_comm *fc = (fwe)->fd.fc;	\
111 		ether_poll_deregister(ifp);			\
112 		fc->set_intr(fc, 1);				\
113 	} while(0)						\
114 
115 static poll_handler_t fwe_poll;
116 
117 static void
118 fwe_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
119 {
120 	struct fwe_softc *fwe;
121 	struct firewire_comm *fc;
122 
123 	fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe;
124 	fc = fwe->fd.fc;
125 	if (cmd == POLL_DEREGISTER) {
126 		/* enable interrupts */
127 		fc->set_intr(fc, 1);
128 		return;
129 	}
130 	fc->poll(fc, (cmd == POLL_AND_CHECK_STATUS)?0:1, count);
131 }
132 #else
133 #define FWE_POLL_REGISTER(func, fwe, ifp)
134 #define FWE_POLL_DEREGISTER(fwe, ifp)
135 #endif
136 static void
137 fwe_identify(driver_t *driver, device_t parent)
138 {
139 	BUS_ADD_CHILD(parent, 0, "fwe", device_get_unit(parent));
140 }
141 
142 static int
143 fwe_probe(device_t dev)
144 {
145 	device_t pa;
146 
147 	pa = device_get_parent(dev);
148 	if(device_get_unit(dev) != device_get_unit(pa)){
149 		return(ENXIO);
150 	}
151 
152 	device_set_desc(dev, "Ethernet over FireWire");
153 	return (0);
154 }
155 
156 static int
157 fwe_attach(device_t dev)
158 {
159 	struct fwe_softc *fwe;
160 	struct ifnet *ifp;
161 	int unit, s;
162 	u_char *eaddr;
163 	struct fw_eui64 *eui;
164 
165 	fwe = ((struct fwe_softc *)device_get_softc(dev));
166 	unit = device_get_unit(dev);
167 
168 	bzero(fwe, sizeof(struct fwe_softc));
169 	/* XXX */
170 	fwe->stream_ch = stream_ch;
171 	fwe->dma_ch = -1;
172 
173 	fwe->fd.fc = device_get_ivars(dev);
174 	if (tx_speed < 0)
175 		tx_speed = fwe->fd.fc->speed;
176 
177 	fwe->fd.dev = dev;
178 	fwe->fd.post_explore = NULL;
179 	fwe->eth_softc.fwe = fwe;
180 
181 	fwe->pkt_hdr.mode.stream.tcode = FWTCODE_STREAM;
182 	fwe->pkt_hdr.mode.stream.sy = 0;
183 	fwe->pkt_hdr.mode.stream.chtag = fwe->stream_ch;
184 
185 	/* generate fake MAC address: first and last 3bytes from eui64 */
186 #define LOCAL (0x02)
187 #define GROUP (0x01)
188 	eaddr = &fwe->eth_softc.arpcom.ac_enaddr[0];
189 
190 	eui = &fwe->fd.fc->eui;
191 	eaddr[0] = (FW_EUI64_BYTE(eui, 0) | LOCAL) & ~GROUP;
192 	eaddr[1] = FW_EUI64_BYTE(eui, 1);
193 	eaddr[2] = FW_EUI64_BYTE(eui, 2);
194 	eaddr[3] = FW_EUI64_BYTE(eui, 5);
195 	eaddr[4] = FW_EUI64_BYTE(eui, 6);
196 	eaddr[5] = FW_EUI64_BYTE(eui, 7);
197 	printf("if_fwe%d: Fake Ethernet address: "
198 		"%02x:%02x:%02x:%02x:%02x:%02x\n", unit,
199 		eaddr[0], eaddr[1], eaddr[2], eaddr[3], eaddr[4], eaddr[5]);
200 
201 	/* fill the rest and attach interface */
202 	ifp = &fwe->fwe_if;
203 	ifp->if_softc = &fwe->eth_softc;
204 
205 #if __FreeBSD_version >= 501113 || defined(__DragonFly__)
206 	if_initname(ifp, device_get_name(dev), unit);
207 #else
208 	ifp->if_unit = unit;
209 	ifp->if_name = "fwe";
210 #endif
211 	ifp->if_init = fwe_init;
212 	ifp->if_start = fwe_start;
213 	ifp->if_ioctl = fwe_ioctl;
214 	ifp->if_mtu = ETHERMTU;
215 	ifp->if_flags = (IFF_BROADCAST|IFF_SIMPLEX|IFF_MULTICAST);
216 	ifp->if_snd.ifq_maxlen = TX_MAX_QUEUE;
217 
218 	s = splimp();
219 #if defined(__DragonFly__) || __FreeBSD_version < 500000
220 	ether_ifattach(ifp, 1);
221 #else
222 	ether_ifattach(ifp, eaddr);
223 #endif
224 	splx(s);
225 
226         /* Tell the upper layer(s) we support long frames. */
227 	ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header);
228 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
229 	ifp->if_capabilities |= IFCAP_VLAN_MTU;
230 	ifp->if_capenable |= IFCAP_VLAN_MTU;
231 #endif
232 
233 
234 	FWEDEBUG(ifp, "interface created\n");
235 	return 0;
236 }
237 
238 static void
239 fwe_stop(struct fwe_softc *fwe)
240 {
241 	struct firewire_comm *fc;
242 	struct fw_xferq *xferq;
243 	struct ifnet *ifp = &fwe->fwe_if;
244 	struct fw_xfer *xfer, *next;
245 	int i;
246 
247 	fc = fwe->fd.fc;
248 
249 	FWE_POLL_DEREGISTER(fwe, ifp);
250 
251 	if (fwe->dma_ch >= 0) {
252 		xferq = fc->ir[fwe->dma_ch];
253 
254 		if (xferq->flag & FWXFERQ_RUNNING)
255 			fc->irx_disable(fc, fwe->dma_ch);
256 		xferq->flag &=
257 			~(FWXFERQ_MODEMASK | FWXFERQ_OPEN | FWXFERQ_STREAM |
258 			FWXFERQ_EXTBUF | FWXFERQ_HANDLER | FWXFERQ_CHTAGMASK);
259 		xferq->hand =  NULL;
260 
261 		for (i = 0; i < xferq->bnchunk; i ++)
262 			m_freem(xferq->bulkxfer[i].mbuf);
263 		free(xferq->bulkxfer, M_FWE);
264 
265 		for (xfer = STAILQ_FIRST(&fwe->xferlist); xfer != NULL;
266 					xfer = next) {
267 			next = STAILQ_NEXT(xfer, link);
268 			fw_xfer_free(xfer);
269 		}
270 		STAILQ_INIT(&fwe->xferlist);
271 
272 		xferq->bulkxfer =  NULL;
273 		fwe->dma_ch = -1;
274 	}
275 
276 	ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
277 }
278 
279 static int
280 fwe_detach(device_t dev)
281 {
282 	struct fwe_softc *fwe;
283 	int s;
284 
285 	fwe = (struct fwe_softc *)device_get_softc(dev);
286 	s = splimp();
287 
288 	fwe_stop(fwe);
289 #if defined(__DragonFly__) || __FreeBSD_version < 500000
290 	ether_ifdetach(&fwe->fwe_if, 1);
291 #else
292 	ether_ifdetach(&fwe->fwe_if);
293 #endif
294 
295 	splx(s);
296 	return 0;
297 }
298 
299 static void
300 fwe_init(void *arg)
301 {
302 	struct fwe_softc *fwe = ((struct fwe_eth_softc *)arg)->fwe;
303 	struct firewire_comm *fc;
304 	struct ifnet *ifp = &fwe->fwe_if;
305 	struct fw_xferq *xferq;
306 	struct fw_xfer *xfer;
307 	struct mbuf *m;
308 	int i;
309 
310 	FWEDEBUG(ifp, "initializing\n");
311 
312 	/* XXX keep promiscoud mode */
313 	ifp->if_flags |= IFF_PROMISC;
314 
315 	fc = fwe->fd.fc;
316 #define START 0
317 	if (fwe->dma_ch < 0) {
318 		for (i = START; i < fc->nisodma; i ++) {
319 			xferq = fc->ir[i];
320 			if ((xferq->flag & FWXFERQ_OPEN) == 0)
321 				goto found;
322 		}
323 		printf("no free dma channel\n");
324 		return;
325 found:
326 		fwe->dma_ch = i;
327 		fwe->stream_ch = stream_ch;
328 		fwe->pkt_hdr.mode.stream.chtag = fwe->stream_ch;
329 		/* allocate DMA channel and init packet mode */
330 		xferq->flag |= FWXFERQ_OPEN | FWXFERQ_EXTBUF |
331 				FWXFERQ_HANDLER | FWXFERQ_STREAM;
332 		xferq->flag &= ~0xff;
333 		xferq->flag |= fwe->stream_ch & 0xff;
334 		/* register fwe_input handler */
335 		xferq->sc = (caddr_t) fwe;
336 		xferq->hand = fwe_as_input;
337 		xferq->bnchunk = rx_queue_len;
338 		xferq->bnpacket = 1;
339 		xferq->psize = MCLBYTES;
340 		xferq->queued = 0;
341 		xferq->buf = NULL;
342 		xferq->bulkxfer = (struct fw_bulkxfer *) malloc(
343 			sizeof(struct fw_bulkxfer) * xferq->bnchunk,
344 							M_FWE, M_WAITOK);
345 		if (xferq->bulkxfer == NULL) {
346 			printf("if_fwe: malloc failed\n");
347 			return;
348 		}
349 		STAILQ_INIT(&xferq->stvalid);
350 		STAILQ_INIT(&xferq->stfree);
351 		STAILQ_INIT(&xferq->stdma);
352 		xferq->stproc = NULL;
353 		for (i = 0; i < xferq->bnchunk; i ++) {
354 			m =
355 #if defined(__DragonFly__) || __FreeBSD_version < 500000
356 				m_getcl(M_WAIT, MT_DATA, M_PKTHDR);
357 #else
358 				m_getcl(M_TRYWAIT, MT_DATA, M_PKTHDR);
359 #endif
360 			xferq->bulkxfer[i].mbuf = m;
361 			if (m != NULL) {
362 				m->m_len = m->m_pkthdr.len = m->m_ext.ext_size;
363 				STAILQ_INSERT_TAIL(&xferq->stfree,
364 						&xferq->bulkxfer[i], link);
365 			} else
366 				printf("fwe_as_input: m_getcl failed\n");
367 		}
368 		STAILQ_INIT(&fwe->xferlist);
369 		for (i = 0; i < TX_MAX_QUEUE; i++) {
370 			xfer = fw_xfer_alloc(M_FWE);
371 			if (xfer == NULL)
372 				break;
373 			xfer->send.spd = tx_speed;
374 			xfer->fc = fwe->fd.fc;
375 			xfer->retry_req = fw_asybusy;
376 			xfer->sc = (caddr_t)fwe;
377 			xfer->act.hand = fwe_output_callback;
378 			STAILQ_INSERT_TAIL(&fwe->xferlist, xfer, link);
379 		}
380 	} else
381 		xferq = fc->ir[fwe->dma_ch];
382 
383 
384 	/* start dma */
385 	if ((xferq->flag & FWXFERQ_RUNNING) == 0)
386 		fc->irx_enable(fc, fwe->dma_ch);
387 
388 	ifp->if_flags |= IFF_RUNNING;
389 	ifp->if_flags &= ~IFF_OACTIVE;
390 
391 	FWE_POLL_REGISTER(fwe_poll, fwe, ifp);
392 #if 0
393 	/* attempt to start output */
394 	fwe_start(ifp);
395 #endif
396 }
397 
398 
399 static int
400 fwe_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
401 {
402 	struct fwe_softc *fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe;
403 	struct ifstat *ifs = NULL;
404 	int s, error, len;
405 
406 	switch (cmd) {
407 		case SIOCSIFFLAGS:
408 			s = splimp();
409 			if (ifp->if_flags & IFF_UP) {
410 				if (!(ifp->if_flags & IFF_RUNNING))
411 					fwe_init(&fwe->eth_softc);
412 			} else {
413 				if (ifp->if_flags & IFF_RUNNING)
414 					fwe_stop(fwe);
415 			}
416 			/* XXX keep promiscoud mode */
417 			ifp->if_flags |= IFF_PROMISC;
418 			splx(s);
419 			break;
420 		case SIOCADDMULTI:
421 		case SIOCDELMULTI:
422 			break;
423 
424 		case SIOCGIFSTATUS:
425 			s = splimp();
426 			ifs = (struct ifstat *)data;
427 			len = strlen(ifs->ascii);
428 			if (len < sizeof(ifs->ascii))
429 				snprintf(ifs->ascii + len,
430 					sizeof(ifs->ascii) - len,
431 					"\tch %d dma %d\n",
432 						fwe->stream_ch, fwe->dma_ch);
433 			splx(s);
434 			break;
435 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
436 		default:
437 #else
438 		case SIOCSIFADDR:
439 		case SIOCGIFADDR:
440 		case SIOCSIFMTU:
441 #endif
442 			s = splimp();
443 			error = ether_ioctl(ifp, cmd, data);
444 			splx(s);
445 			return (error);
446 #if defined(__DragonFly__) || __FreeBSD_version < 500000
447 		default:
448 			return (EINVAL);
449 #endif
450 	}
451 
452 	return (0);
453 }
454 
455 static void
456 fwe_output_callback(struct fw_xfer *xfer)
457 {
458 	struct fwe_softc *fwe;
459 	struct ifnet *ifp;
460 	int s;
461 
462 	fwe = (struct fwe_softc *)xfer->sc;
463 	ifp = &fwe->fwe_if;
464 	/* XXX error check */
465 	FWEDEBUG(ifp, "resp = %d\n", xfer->resp);
466 	if (xfer->resp != 0)
467 		ifp->if_oerrors ++;
468 
469 	m_freem(xfer->mbuf);
470 	fw_xfer_unload(xfer);
471 
472 	s = splimp();
473 	STAILQ_INSERT_TAIL(&fwe->xferlist, xfer, link);
474 	splx(s);
475 
476 	/* for queue full */
477 	if (ifp->if_snd.ifq_head != NULL)
478 		fwe_start(ifp);
479 }
480 
481 static void
482 fwe_start(struct ifnet *ifp)
483 {
484 	struct fwe_softc *fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe;
485 	int s;
486 
487 	FWEDEBUG(ifp, "starting\n");
488 
489 	if (fwe->dma_ch < 0) {
490 		struct mbuf	*m = NULL;
491 
492 		FWEDEBUG(ifp, "not ready\n");
493 
494 		s = splimp();
495 		do {
496 			IF_DEQUEUE(&ifp->if_snd, m);
497 			if (m != NULL)
498 				m_freem(m);
499 			ifp->if_oerrors ++;
500 		} while (m != NULL);
501 		splx(s);
502 
503 		return;
504 	}
505 
506 	s = splimp();
507 	ifp->if_flags |= IFF_OACTIVE;
508 
509 	if (ifp->if_snd.ifq_len != 0)
510 		fwe_as_output(fwe, ifp);
511 
512 	ifp->if_flags &= ~IFF_OACTIVE;
513 	splx(s);
514 }
515 
516 #define HDR_LEN 4
517 #ifndef ETHER_ALIGN
518 #define ETHER_ALIGN 2
519 #endif
520 /* Async. stream output */
521 static void
522 fwe_as_output(struct fwe_softc *fwe, struct ifnet *ifp)
523 {
524 	struct mbuf *m;
525 	struct fw_xfer *xfer;
526 	struct fw_xferq *xferq;
527 	struct fw_pkt *fp;
528 	int i = 0;
529 
530 	xfer = NULL;
531 	xferq = fwe->fd.fc->atq;
532 	while (xferq->queued < xferq->maxq - 1) {
533 		xfer = STAILQ_FIRST(&fwe->xferlist);
534 		if (xfer == NULL) {
535 			printf("if_fwe: lack of xfer\n");
536 			return;
537 		}
538 		IF_DEQUEUE(&ifp->if_snd, m);
539 		if (m == NULL)
540 			break;
541 		STAILQ_REMOVE_HEAD(&fwe->xferlist, link);
542 #if defined(__DragonFly__) || __FreeBSD_version < 500000
543 		if (ifp->if_bpf != NULL)
544 			bpf_mtap(ifp, m);
545 #else
546 		BPF_MTAP(ifp, m);
547 #endif
548 
549 		/* keep ip packet alignment for alpha */
550 		M_PREPEND(m, ETHER_ALIGN, M_DONTWAIT);
551 		fp = &xfer->send.hdr;
552 		*(uint32_t *)&xfer->send.hdr = *(int32_t *)&fwe->pkt_hdr;
553 		fp->mode.stream.len = m->m_pkthdr.len;
554 		xfer->mbuf = m;
555 		xfer->send.pay_len = m->m_pkthdr.len;
556 
557 		if (fw_asyreq(fwe->fd.fc, -1, xfer) != 0) {
558 			/* error */
559 			ifp->if_oerrors ++;
560 			/* XXX set error code */
561 			fwe_output_callback(xfer);
562 		} else {
563 			ifp->if_opackets ++;
564 			i++;
565 		}
566 	}
567 #if 0
568 	if (i > 1)
569 		printf("%d queued\n", i);
570 #endif
571 	if (i > 0)
572 		xferq->start(fwe->fd.fc);
573 }
574 
575 /* Async. stream output */
576 static void
577 fwe_as_input(struct fw_xferq *xferq)
578 {
579 	struct mbuf *m, *m0;
580 	struct ifnet *ifp;
581 	struct fwe_softc *fwe;
582 	struct fw_bulkxfer *sxfer;
583 	struct fw_pkt *fp;
584 	u_char *c;
585 #if defined(__DragonFly__) || __FreeBSD_version < 500000
586 	struct ether_header *eh;
587 #endif
588 
589 	fwe = (struct fwe_softc *)xferq->sc;
590 	ifp = &fwe->fwe_if;
591 #if 0
592 	FWE_POLL_REGISTER(fwe_poll, fwe, ifp);
593 #endif
594 	while ((sxfer = STAILQ_FIRST(&xferq->stvalid)) != NULL) {
595 		STAILQ_REMOVE_HEAD(&xferq->stvalid, link);
596 		fp = mtod(sxfer->mbuf, struct fw_pkt *);
597 		if (fwe->fd.fc->irx_post != NULL)
598 			fwe->fd.fc->irx_post(fwe->fd.fc, fp->mode.ld);
599 		m = sxfer->mbuf;
600 
601 		/* insert new rbuf */
602 		sxfer->mbuf = m0 = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
603 		if (m0 != NULL) {
604 			m0->m_len = m0->m_pkthdr.len = m0->m_ext.ext_size;
605 			STAILQ_INSERT_TAIL(&xferq->stfree, sxfer, link);
606 		} else
607 			printf("fwe_as_input: m_getcl failed\n");
608 
609 		if (sxfer->resp != 0 || fp->mode.stream.len <
610 		    ETHER_ALIGN + sizeof(struct ether_header)) {
611 			m_freem(m);
612 			ifp->if_ierrors ++;
613 			continue;
614 		}
615 
616 		m->m_data += HDR_LEN + ETHER_ALIGN;
617 		c = mtod(m, char *);
618 #if defined(__DragonFly__) || __FreeBSD_version < 500000
619 		eh = (struct ether_header *)c;
620 		m->m_data += sizeof(struct ether_header);
621 #endif
622 		m->m_len = m->m_pkthdr.len =
623 				fp->mode.stream.len - ETHER_ALIGN;
624 		m->m_pkthdr.rcvif = ifp;
625 #if 0
626 		FWEDEBUG(ifp, "%02x %02x %02x %02x %02x %02x\n"
627 			 "%02x %02x %02x %02x %02x %02x\n"
628 			 "%02x %02x %02x %02x\n"
629 			 "%02x %02x %02x %02x\n"
630 			 "%02x %02x %02x %02x\n"
631 			 "%02x %02x %02x %02x\n",
632 			 c[0], c[1], c[2], c[3], c[4], c[5],
633 			 c[6], c[7], c[8], c[9], c[10], c[11],
634 			 c[12], c[13], c[14], c[15],
635 			 c[16], c[17], c[18], c[19],
636 			 c[20], c[21], c[22], c[23],
637 			 c[20], c[21], c[22], c[23]
638 		 );
639 #endif
640 #if defined(__DragonFly__) || __FreeBSD_version < 500000
641 		ether_input(ifp, eh, m);
642 #else
643 		(*ifp->if_input)(ifp, m);
644 #endif
645 		ifp->if_ipackets ++;
646 	}
647 	if (STAILQ_FIRST(&xferq->stfree) != NULL)
648 		fwe->fd.fc->irx_enable(fwe->fd.fc, fwe->dma_ch);
649 }
650 
651 
652 static devclass_t fwe_devclass;
653 
654 static device_method_t fwe_methods[] = {
655 	/* device interface */
656 	DEVMETHOD(device_identify,	fwe_identify),
657 	DEVMETHOD(device_probe,		fwe_probe),
658 	DEVMETHOD(device_attach,	fwe_attach),
659 	DEVMETHOD(device_detach,	fwe_detach),
660 	{ 0, 0 }
661 };
662 
663 static driver_t fwe_driver = {
664         "fwe",
665 	fwe_methods,
666 	sizeof(struct fwe_softc),
667 };
668 
669 
670 #ifdef __DragonFly__
671 DECLARE_DUMMY_MODULE(fwe);
672 #endif
673 DRIVER_MODULE(fwe, firewire, fwe_driver, fwe_devclass, 0, 0);
674 MODULE_VERSION(fwe, 1);
675 MODULE_DEPEND(fwe, firewire, 1, 1, 1);
676