xref: /freebsd/sys/dev/usb/net/usb_ethernet.c (revision 924226fba12cc9a228c73b956e1b7fa24c60b055)
1 /* $FreeBSD$ */
2 /*-
3  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4  *
5  * Copyright (c) 2009 Andrew Thompson (thompsa@FreeBSD.org)
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31 
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/bus.h>
35 #include <sys/condvar.h>
36 #include <sys/kernel.h>
37 #include <sys/lock.h>
38 #include <sys/malloc.h>
39 #include <sys/mbuf.h>
40 #include <sys/module.h>
41 #include <sys/mutex.h>
42 #include <sys/socket.h>
43 #include <sys/sockio.h>
44 #include <sys/sysctl.h>
45 #include <sys/sx.h>
46 
47 #include <net/if.h>
48 #include <net/if_var.h>
49 #include <net/ethernet.h>
50 #include <net/if_types.h>
51 #include <net/if_media.h>
52 #include <net/if_vlan_var.h>
53 
54 #include <dev/mii/mii.h>
55 #include <dev/mii/miivar.h>
56 
57 #include <dev/usb/usb.h>
58 #include <dev/usb/usbdi.h>
59 
60 #include <dev/usb/usb_process.h>
61 #include <dev/usb/net/usb_ethernet.h>
62 
63 static SYSCTL_NODE(_net, OID_AUTO, ue, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
64     "USB Ethernet parameters");
65 
66 #define	UE_LOCK(_ue)		mtx_lock((_ue)->ue_mtx)
67 #define	UE_UNLOCK(_ue)		mtx_unlock((_ue)->ue_mtx)
68 #define	UE_LOCK_ASSERT(_ue, t)	mtx_assert((_ue)->ue_mtx, t)
69 
70 MODULE_DEPEND(uether, usb, 1, 1, 1);
71 MODULE_DEPEND(uether, miibus, 1, 1, 1);
72 
73 static struct unrhdr *ueunit;
74 
75 static usb_proc_callback_t ue_attach_post_task;
76 static usb_proc_callback_t ue_promisc_task;
77 static usb_proc_callback_t ue_setmulti_task;
78 static usb_proc_callback_t ue_ifmedia_task;
79 static usb_proc_callback_t ue_tick_task;
80 static usb_proc_callback_t ue_start_task;
81 static usb_proc_callback_t ue_stop_task;
82 
83 static void	ue_init(void *);
84 static void	ue_start(struct ifnet *);
85 static int	ue_ifmedia_upd(struct ifnet *);
86 static void	ue_watchdog(void *);
87 
88 /*
89  * Return values:
90  *    0: success
91  * Else: device has been detached
92  */
93 uint8_t
94 uether_pause(struct usb_ether *ue, unsigned int _ticks)
95 {
96 	if (usb_proc_is_gone(&ue->ue_tq)) {
97 		/* nothing to do */
98 		return (1);
99 	}
100 	usb_pause_mtx(ue->ue_mtx, _ticks);
101 	return (0);
102 }
103 
104 static void
105 ue_queue_command(struct usb_ether *ue,
106     usb_proc_callback_t *fn,
107     struct usb_proc_msg *t0, struct usb_proc_msg *t1)
108 {
109 	struct usb_ether_cfg_task *task;
110 
111 	UE_LOCK_ASSERT(ue, MA_OWNED);
112 
113 	if (usb_proc_is_gone(&ue->ue_tq)) {
114 		return;         /* nothing to do */
115 	}
116 	/*
117 	 * NOTE: The task cannot get executed before we drop the
118 	 * "sc_mtx" mutex. It is safe to update fields in the message
119 	 * structure after that the message got queued.
120 	 */
121 	task = (struct usb_ether_cfg_task *)
122 	  usb_proc_msignal(&ue->ue_tq, t0, t1);
123 
124 	/* Setup callback and self pointers */
125 	task->hdr.pm_callback = fn;
126 	task->ue = ue;
127 
128 	/*
129 	 * Start and stop must be synchronous!
130 	 */
131 	if ((fn == ue_start_task) || (fn == ue_stop_task))
132 		usb_proc_mwait(&ue->ue_tq, t0, t1);
133 }
134 
135 struct ifnet *
136 uether_getifp(struct usb_ether *ue)
137 {
138 	return (ue->ue_ifp);
139 }
140 
141 struct mii_data *
142 uether_getmii(struct usb_ether *ue)
143 {
144 	return (device_get_softc(ue->ue_miibus));
145 }
146 
147 void *
148 uether_getsc(struct usb_ether *ue)
149 {
150 	return (ue->ue_sc);
151 }
152 
153 static int
154 ue_sysctl_parent(SYSCTL_HANDLER_ARGS)
155 {
156 	struct usb_ether *ue = arg1;
157 	const char *name;
158 
159 	name = device_get_nameunit(ue->ue_dev);
160 	return SYSCTL_OUT_STR(req, name);
161 }
162 
163 int
164 uether_ifattach(struct usb_ether *ue)
165 {
166 	int error;
167 
168 	/* check some critical parameters */
169 	if ((ue->ue_dev == NULL) ||
170 	    (ue->ue_udev == NULL) ||
171 	    (ue->ue_mtx == NULL) ||
172 	    (ue->ue_methods == NULL))
173 		return (EINVAL);
174 
175 	error = usb_proc_create(&ue->ue_tq, ue->ue_mtx,
176 	    device_get_nameunit(ue->ue_dev), USB_PRI_MED);
177 	if (error) {
178 		device_printf(ue->ue_dev, "could not setup taskqueue\n");
179 		goto error;
180 	}
181 
182 	/* fork rest of the attach code */
183 	UE_LOCK(ue);
184 	ue_queue_command(ue, ue_attach_post_task,
185 	    &ue->ue_sync_task[0].hdr,
186 	    &ue->ue_sync_task[1].hdr);
187 	UE_UNLOCK(ue);
188 
189 error:
190 	return (error);
191 }
192 
193 void
194 uether_ifattach_wait(struct usb_ether *ue)
195 {
196 
197 	UE_LOCK(ue);
198 	usb_proc_mwait(&ue->ue_tq,
199 	    &ue->ue_sync_task[0].hdr,
200 	    &ue->ue_sync_task[1].hdr);
201 	UE_UNLOCK(ue);
202 }
203 
204 static void
205 ue_attach_post_task(struct usb_proc_msg *_task)
206 {
207 	struct usb_ether_cfg_task *task =
208 	    (struct usb_ether_cfg_task *)_task;
209 	struct usb_ether *ue = task->ue;
210 	struct ifnet *ifp;
211 	int error;
212 	char num[14];			/* sufficient for 32 bits */
213 
214 	/* first call driver's post attach routine */
215 	ue->ue_methods->ue_attach_post(ue);
216 
217 	UE_UNLOCK(ue);
218 
219 	ue->ue_unit = alloc_unr(ueunit);
220 	usb_callout_init_mtx(&ue->ue_watchdog, ue->ue_mtx, 0);
221 	sysctl_ctx_init(&ue->ue_sysctl_ctx);
222 	mbufq_init(&ue->ue_rxq, 0 /* unlimited length */);
223 
224 	error = 0;
225 	CURVNET_SET_QUIET(vnet0);
226 	ifp = if_alloc(IFT_ETHER);
227 	if (ifp == NULL) {
228 		device_printf(ue->ue_dev, "could not allocate ifnet\n");
229 		goto fail;
230 	}
231 
232 	ifp->if_softc = ue;
233 	if_initname(ifp, "ue", ue->ue_unit);
234 	if (ue->ue_methods->ue_attach_post_sub != NULL) {
235 		ue->ue_ifp = ifp;
236 		error = ue->ue_methods->ue_attach_post_sub(ue);
237 	} else {
238 		ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
239 		if (ue->ue_methods->ue_ioctl != NULL)
240 			ifp->if_ioctl = ue->ue_methods->ue_ioctl;
241 		else
242 			ifp->if_ioctl = uether_ioctl;
243 		ifp->if_start = ue_start;
244 		ifp->if_init = ue_init;
245 		IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen);
246 		ifp->if_snd.ifq_drv_maxlen = ifqmaxlen;
247 		IFQ_SET_READY(&ifp->if_snd);
248 		ue->ue_ifp = ifp;
249 
250 		if (ue->ue_methods->ue_mii_upd != NULL &&
251 		    ue->ue_methods->ue_mii_sts != NULL) {
252 			bus_topo_lock();
253 			error = mii_attach(ue->ue_dev, &ue->ue_miibus, ifp,
254 			    ue_ifmedia_upd, ue->ue_methods->ue_mii_sts,
255 			    BMSR_DEFCAPMASK, MII_PHY_ANY, MII_OFFSET_ANY, 0);
256 			bus_topo_unlock();
257 		}
258 	}
259 
260 	if (error) {
261 		device_printf(ue->ue_dev, "attaching PHYs failed\n");
262 		goto fail;
263 	}
264 
265 	if_printf(ifp, "<USB Ethernet> on %s\n", device_get_nameunit(ue->ue_dev));
266 	ether_ifattach(ifp, ue->ue_eaddr);
267 	/* Tell upper layer we support VLAN oversized frames. */
268 	if (ifp->if_capabilities & IFCAP_VLAN_MTU)
269 		ifp->if_hdrlen = sizeof(struct ether_vlan_header);
270 
271 	CURVNET_RESTORE();
272 
273 	snprintf(num, sizeof(num), "%u", ue->ue_unit);
274 	ue->ue_sysctl_oid = SYSCTL_ADD_NODE(&ue->ue_sysctl_ctx,
275 	    &SYSCTL_NODE_CHILDREN(_net, ue),
276 	    OID_AUTO, num, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "");
277 	SYSCTL_ADD_PROC(&ue->ue_sysctl_ctx,
278 	    SYSCTL_CHILDREN(ue->ue_sysctl_oid), OID_AUTO, "%parent",
279 	    CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, ue, 0,
280 	    ue_sysctl_parent, "A", "parent device");
281 
282 	UE_LOCK(ue);
283 	return;
284 
285 fail:
286 	CURVNET_RESTORE();
287 
288 	/* drain mbuf queue */
289 	mbufq_drain(&ue->ue_rxq);
290 
291 	/* free unit */
292 	free_unr(ueunit, ue->ue_unit);
293 	if (ue->ue_ifp != NULL) {
294 		if_free(ue->ue_ifp);
295 		ue->ue_ifp = NULL;
296 	}
297 	UE_LOCK(ue);
298 	return;
299 }
300 
301 void
302 uether_ifdetach(struct usb_ether *ue)
303 {
304 	struct ifnet *ifp;
305 
306 	/* wait for any post attach or other command to complete */
307 	usb_proc_drain(&ue->ue_tq);
308 
309 	/* read "ifnet" pointer after taskqueue drain */
310 	ifp = ue->ue_ifp;
311 
312 	if (ifp != NULL) {
313 		/* we are not running any more */
314 		UE_LOCK(ue);
315 		ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
316 		UE_UNLOCK(ue);
317 
318 		/* drain any callouts */
319 		usb_callout_drain(&ue->ue_watchdog);
320 
321 		/*
322 		 * Detach ethernet first to stop miibus calls from
323 		 * user-space:
324 		 */
325 		ether_ifdetach(ifp);
326 
327 		/* detach miibus */
328 		if (ue->ue_miibus != NULL) {
329 			bus_topo_lock();
330 			device_delete_child(ue->ue_dev, ue->ue_miibus);
331 			bus_topo_unlock();
332 		}
333 
334 		/* free interface instance */
335 		if_free(ifp);
336 
337 		/* free sysctl */
338 		sysctl_ctx_free(&ue->ue_sysctl_ctx);
339 
340 		/* drain mbuf queue */
341 		mbufq_drain(&ue->ue_rxq);
342 
343 		/* free unit */
344 		free_unr(ueunit, ue->ue_unit);
345 	}
346 
347 	/* free taskqueue, if any */
348 	usb_proc_free(&ue->ue_tq);
349 }
350 
351 uint8_t
352 uether_is_gone(struct usb_ether *ue)
353 {
354 	return (usb_proc_is_gone(&ue->ue_tq));
355 }
356 
357 void
358 uether_init(void *arg)
359 {
360 
361 	ue_init(arg);
362 }
363 
364 static void
365 ue_init(void *arg)
366 {
367 	struct usb_ether *ue = arg;
368 
369 	UE_LOCK(ue);
370 	ue_queue_command(ue, ue_start_task,
371 	    &ue->ue_sync_task[0].hdr,
372 	    &ue->ue_sync_task[1].hdr);
373 	UE_UNLOCK(ue);
374 }
375 
376 static void
377 ue_start_task(struct usb_proc_msg *_task)
378 {
379 	struct usb_ether_cfg_task *task =
380 	    (struct usb_ether_cfg_task *)_task;
381 	struct usb_ether *ue = task->ue;
382 	struct ifnet *ifp = ue->ue_ifp;
383 
384 	UE_LOCK_ASSERT(ue, MA_OWNED);
385 
386 	ue->ue_methods->ue_init(ue);
387 
388 	if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
389 		return;
390 
391 	if (ue->ue_methods->ue_tick != NULL)
392 		usb_callout_reset(&ue->ue_watchdog, hz, ue_watchdog, ue);
393 }
394 
395 static void
396 ue_stop_task(struct usb_proc_msg *_task)
397 {
398 	struct usb_ether_cfg_task *task =
399 	    (struct usb_ether_cfg_task *)_task;
400 	struct usb_ether *ue = task->ue;
401 
402 	UE_LOCK_ASSERT(ue, MA_OWNED);
403 
404 	usb_callout_stop(&ue->ue_watchdog);
405 
406 	ue->ue_methods->ue_stop(ue);
407 }
408 
409 void
410 uether_start(struct ifnet *ifp)
411 {
412 
413 	ue_start(ifp);
414 }
415 
416 static void
417 ue_start(struct ifnet *ifp)
418 {
419 	struct usb_ether *ue = ifp->if_softc;
420 
421 	if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
422 		return;
423 
424 	UE_LOCK(ue);
425 	ue->ue_methods->ue_start(ue);
426 	UE_UNLOCK(ue);
427 }
428 
429 static void
430 ue_promisc_task(struct usb_proc_msg *_task)
431 {
432 	struct usb_ether_cfg_task *task =
433 	    (struct usb_ether_cfg_task *)_task;
434 	struct usb_ether *ue = task->ue;
435 
436 	ue->ue_methods->ue_setpromisc(ue);
437 }
438 
439 static void
440 ue_setmulti_task(struct usb_proc_msg *_task)
441 {
442 	struct usb_ether_cfg_task *task =
443 	    (struct usb_ether_cfg_task *)_task;
444 	struct usb_ether *ue = task->ue;
445 
446 	ue->ue_methods->ue_setmulti(ue);
447 }
448 
449 int
450 uether_ifmedia_upd(struct ifnet *ifp)
451 {
452 
453 	return (ue_ifmedia_upd(ifp));
454 }
455 
456 static int
457 ue_ifmedia_upd(struct ifnet *ifp)
458 {
459 	struct usb_ether *ue = ifp->if_softc;
460 
461 	/* Defer to process context */
462 	UE_LOCK(ue);
463 	ue_queue_command(ue, ue_ifmedia_task,
464 	    &ue->ue_media_task[0].hdr,
465 	    &ue->ue_media_task[1].hdr);
466 	UE_UNLOCK(ue);
467 
468 	return (0);
469 }
470 
471 static void
472 ue_ifmedia_task(struct usb_proc_msg *_task)
473 {
474 	struct usb_ether_cfg_task *task =
475 	    (struct usb_ether_cfg_task *)_task;
476 	struct usb_ether *ue = task->ue;
477 	struct ifnet *ifp = ue->ue_ifp;
478 
479 	ue->ue_methods->ue_mii_upd(ifp);
480 }
481 
482 static void
483 ue_watchdog(void *arg)
484 {
485 	struct usb_ether *ue = arg;
486 	struct ifnet *ifp = ue->ue_ifp;
487 
488 	if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
489 		return;
490 
491 	ue_queue_command(ue, ue_tick_task,
492 	    &ue->ue_tick_task[0].hdr,
493 	    &ue->ue_tick_task[1].hdr);
494 
495 	usb_callout_reset(&ue->ue_watchdog, hz, ue_watchdog, ue);
496 }
497 
498 static void
499 ue_tick_task(struct usb_proc_msg *_task)
500 {
501 	struct usb_ether_cfg_task *task =
502 	    (struct usb_ether_cfg_task *)_task;
503 	struct usb_ether *ue = task->ue;
504 	struct ifnet *ifp = ue->ue_ifp;
505 
506 	if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
507 		return;
508 
509 	ue->ue_methods->ue_tick(ue);
510 }
511 
512 int
513 uether_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
514 {
515 	struct usb_ether *ue = ifp->if_softc;
516 	struct ifreq *ifr = (struct ifreq *)data;
517 	struct mii_data *mii;
518 	int error = 0;
519 
520 	switch (command) {
521 	case SIOCSIFFLAGS:
522 		UE_LOCK(ue);
523 		if (ifp->if_flags & IFF_UP) {
524 			if (ifp->if_drv_flags & IFF_DRV_RUNNING)
525 				ue_queue_command(ue, ue_promisc_task,
526 				    &ue->ue_promisc_task[0].hdr,
527 				    &ue->ue_promisc_task[1].hdr);
528 			else
529 				ue_queue_command(ue, ue_start_task,
530 				    &ue->ue_sync_task[0].hdr,
531 				    &ue->ue_sync_task[1].hdr);
532 		} else {
533 			ue_queue_command(ue, ue_stop_task,
534 			    &ue->ue_sync_task[0].hdr,
535 			    &ue->ue_sync_task[1].hdr);
536 		}
537 		UE_UNLOCK(ue);
538 		break;
539 	case SIOCADDMULTI:
540 	case SIOCDELMULTI:
541 		UE_LOCK(ue);
542 		ue_queue_command(ue, ue_setmulti_task,
543 		    &ue->ue_multi_task[0].hdr,
544 		    &ue->ue_multi_task[1].hdr);
545 		UE_UNLOCK(ue);
546 		break;
547 	case SIOCGIFMEDIA:
548 	case SIOCSIFMEDIA:
549 		if (ue->ue_miibus != NULL) {
550 			mii = device_get_softc(ue->ue_miibus);
551 			error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
552 		} else
553 			error = ether_ioctl(ifp, command, data);
554 		break;
555 	default:
556 		error = ether_ioctl(ifp, command, data);
557 		break;
558 	}
559 	return (error);
560 }
561 
562 static int
563 uether_modevent(module_t mod, int type, void *data)
564 {
565 
566 	switch (type) {
567 	case MOD_LOAD:
568 		ueunit = new_unrhdr(0, INT_MAX, NULL);
569 		break;
570 	case MOD_UNLOAD:
571 		break;
572 	default:
573 		return (EOPNOTSUPP);
574 	}
575 	return (0);
576 }
577 static moduledata_t uether_mod = {
578 	"uether",
579 	uether_modevent,
580 	0
581 };
582 
583 struct mbuf *
584 uether_newbuf(void)
585 {
586 	struct mbuf *m_new;
587 
588 	m_new = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
589 	if (m_new == NULL)
590 		return (NULL);
591 	m_new->m_len = m_new->m_pkthdr.len = MCLBYTES;
592 
593 	m_adj(m_new, ETHER_ALIGN);
594 	return (m_new);
595 }
596 
597 int
598 uether_rxmbuf(struct usb_ether *ue, struct mbuf *m,
599     unsigned int len)
600 {
601 	struct ifnet *ifp = ue->ue_ifp;
602 
603 	UE_LOCK_ASSERT(ue, MA_OWNED);
604 
605 	/* finalize mbuf */
606 	if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
607 	m->m_pkthdr.rcvif = ifp;
608 	m->m_pkthdr.len = m->m_len = len;
609 
610 	/* enqueue for later when the lock can be released */
611 	(void)mbufq_enqueue(&ue->ue_rxq, m);
612 	return (0);
613 }
614 
615 int
616 uether_rxbuf(struct usb_ether *ue, struct usb_page_cache *pc,
617     unsigned int offset, unsigned int len)
618 {
619 	struct ifnet *ifp = ue->ue_ifp;
620 	struct mbuf *m;
621 
622 	UE_LOCK_ASSERT(ue, MA_OWNED);
623 
624 	if (len < ETHER_HDR_LEN || len > MCLBYTES - ETHER_ALIGN)
625 		return (1);
626 
627 	m = uether_newbuf();
628 	if (m == NULL) {
629 		if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1);
630 		return (ENOMEM);
631 	}
632 
633 	usbd_copy_out(pc, offset, mtod(m, uint8_t *), len);
634 
635 	/* finalize mbuf */
636 	if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
637 	m->m_pkthdr.rcvif = ifp;
638 	m->m_pkthdr.len = m->m_len = len;
639 
640 	/* enqueue for later when the lock can be released */
641 	(void)mbufq_enqueue(&ue->ue_rxq, m);
642 	return (0);
643 }
644 
645 void
646 uether_rxflush(struct usb_ether *ue)
647 {
648 	struct ifnet *ifp = ue->ue_ifp;
649 	struct epoch_tracker et;
650 	struct mbuf *m, *n;
651 
652 	UE_LOCK_ASSERT(ue, MA_OWNED);
653 
654 	n = mbufq_flush(&ue->ue_rxq);
655 	UE_UNLOCK(ue);
656 	NET_EPOCH_ENTER(et);
657 	while ((m = n) != NULL) {
658 		n = STAILQ_NEXT(m, m_stailqpkt);
659 		m->m_nextpkt = NULL;
660 		ifp->if_input(ifp, m);
661 	}
662 	NET_EPOCH_EXIT(et);
663 	UE_LOCK(ue);
664 }
665 
666 /*
667  * USB net drivers are run by DRIVER_MODULE() thus SI_SUB_DRIVERS,
668  * SI_ORDER_MIDDLE.  Run uether after that.
669  */
670 DECLARE_MODULE(uether, uether_mod, SI_SUB_DRIVERS, SI_ORDER_ANY);
671 MODULE_VERSION(uether, 1);
672