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