xref: /freebsd/sys/powerpc/pseries/phyp_llan.c (revision 42249ef2) 
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3  *
4  * Copyright 2013 Nathan Whitehorn
5  * All rights reserved.
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/sockio.h>
35 #include <sys/endian.h>
36 #include <sys/lock.h>
37 #include <sys/mbuf.h>
38 #include <sys/module.h>
39 #include <sys/malloc.h>
40 #include <sys/mutex.h>
41 #include <sys/kernel.h>
42 #include <sys/socket.h>
43 
44 #include <net/bpf.h>
45 #include <net/if.h>
46 #include <net/if_var.h>
47 #include <net/ethernet.h>
48 #include <net/if_dl.h>
49 #include <net/if_media.h>
50 #include <net/if_types.h>
51 
52 #include <dev/ofw/openfirm.h>
53 #include <dev/ofw/ofw_bus.h>
54 #include <dev/ofw/ofw_bus_subr.h>
55 #include <machine/bus.h>
56 #include <machine/resource.h>
57 #include <sys/bus.h>
58 #include <sys/rman.h>
59 
60 #include <powerpc/pseries/phyp-hvcall.h>
61 
62 #define LLAN_MAX_RX_PACKETS	100
63 #define LLAN_MAX_TX_PACKETS	100
64 #define LLAN_RX_BUF_LEN		8*PAGE_SIZE
65 
66 #define LLAN_BUFDESC_VALID	(1ULL << 63)
67 #define LLAN_ADD_MULTICAST	0x1
68 #define LLAN_DEL_MULTICAST	0x2
69 #define LLAN_CLEAR_MULTICAST	0x3
70 
71 struct llan_xfer {
72 	struct mbuf *rx_mbuf;
73 	bus_dmamap_t rx_dmamap;
74 	uint64_t rx_bufdesc;
75 };
76 
77 struct llan_receive_queue_entry { /* PAPR page 539 */
78 	uint8_t control;
79 	uint8_t reserved;
80 	uint16_t offset;
81 	uint32_t length;
82 	uint64_t handle;
83 } __packed;
84 
85 struct llan_softc {
86 	device_t	dev;
87 	struct mtx	io_lock;
88 
89 	cell_t		unit;
90 	uint8_t		mac_address[8];
91 
92 	struct ifmedia	media;
93 
94 	int		irqid;
95 	struct resource	*irq;
96 	void		*irq_cookie;
97 
98 	bus_dma_tag_t	rx_dma_tag;
99 	bus_dma_tag_t	rxbuf_dma_tag;
100 	bus_dma_tag_t	tx_dma_tag;
101 
102 	bus_dmamap_t	tx_dma_map;
103 
104 	struct llan_receive_queue_entry *rx_buf;
105 	int		rx_dma_slot;
106 	int		rx_valid_val;
107 	bus_dmamap_t	rx_buf_map;
108 	bus_addr_t	rx_buf_phys;
109 	bus_size_t	rx_buf_len;
110 	bus_addr_t	input_buf_phys;
111 	bus_addr_t	filter_buf_phys;
112 	struct llan_xfer rx_xfer[LLAN_MAX_RX_PACKETS];
113 
114 	struct ifnet	*ifp;
115 };
116 
117 static int	llan_probe(device_t);
118 static int	llan_attach(device_t);
119 static void	llan_intr(void *xsc);
120 static void	llan_init(void *xsc);
121 static void	llan_start(struct ifnet *ifp);
122 static int	llan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
123 static void	llan_media_status(struct ifnet *ifp, struct ifmediareq *ifmr);
124 static int	llan_media_change(struct ifnet *ifp);
125 static void	llan_rx_load_cb(void *xsc, bus_dma_segment_t *segs, int nsegs,
126 		    int err);
127 static int	llan_add_rxbuf(struct llan_softc *sc, struct llan_xfer *rx);
128 static int	llan_set_multicast(struct llan_softc *sc);
129 
130 static devclass_t       llan_devclass;
131 static device_method_t  llan_methods[] = {
132         DEVMETHOD(device_probe,         llan_probe),
133         DEVMETHOD(device_attach,        llan_attach),
134 
135         DEVMETHOD_END
136 };
137 static driver_t llan_driver = {
138         "llan",
139         llan_methods,
140         sizeof(struct llan_softc)
141 };
142 DRIVER_MODULE(llan, vdevice, llan_driver, llan_devclass, 0, 0);
143 
144 static int
145 llan_probe(device_t dev)
146 {
147 	if (!ofw_bus_is_compatible(dev,"IBM,l-lan"))
148 		return (ENXIO);
149 
150 	device_set_desc(dev, "POWER Hypervisor Virtual Ethernet");
151 	return (0);
152 }
153 
154 static int
155 llan_attach(device_t dev)
156 {
157 	struct llan_softc *sc;
158 	phandle_t node;
159 	int error, i;
160 	ssize_t len;
161 
162 	sc = device_get_softc(dev);
163 	sc->dev = dev;
164 
165 	/* Get firmware properties */
166 	node = ofw_bus_get_node(dev);
167 	len = OF_getprop(node, "local-mac-address", sc->mac_address,
168 	    sizeof(sc->mac_address));
169 	/* If local-mac-address property has only 6 bytes (ETHER_ADDR_LEN)
170 	 * instead of 8 (sizeof(sc->mac_address)), then its value must be
171 	 * shifted 2 bytes to the right. */
172 	if (len == ETHER_ADDR_LEN) {
173 		bcopy(sc->mac_address, &sc->mac_address[2], len);
174 		/* Zero out the first 2 bytes. */
175 		bzero(sc->mac_address, 2);
176 	}
177 	OF_getencprop(node, "reg", &sc->unit, sizeof(sc->unit));
178 
179 	mtx_init(&sc->io_lock, "llan", NULL, MTX_DEF);
180 
181         /* Setup interrupt */
182 	sc->irqid = 0;
183 	sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irqid,
184 	    RF_ACTIVE);
185 
186 	if (!sc->irq) {
187 		device_printf(dev, "Could not allocate IRQ\n");
188 		mtx_destroy(&sc->io_lock);
189 		return (ENXIO);
190 	}
191 
192 	bus_setup_intr(dev, sc->irq, INTR_TYPE_MISC | INTR_MPSAFE |
193 	    INTR_ENTROPY, NULL, llan_intr, sc, &sc->irq_cookie);
194 
195 	/* Setup DMA */
196 	error = bus_dma_tag_create(bus_get_dma_tag(dev), 16, 0,
197             BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL,
198 	    LLAN_RX_BUF_LEN, 1, BUS_SPACE_MAXSIZE_32BIT,
199 	    0, NULL, NULL, &sc->rx_dma_tag);
200 	error = bus_dma_tag_create(bus_get_dma_tag(dev), 4, 0,
201             BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL,
202 	    BUS_SPACE_MAXSIZE, 1, BUS_SPACE_MAXSIZE_32BIT,
203 	    0, NULL, NULL, &sc->rxbuf_dma_tag);
204 	error = bus_dma_tag_create(bus_get_dma_tag(dev), 1, 0,
205             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
206 	    BUS_SPACE_MAXSIZE, 6, BUS_SPACE_MAXSIZE_32BIT, 0,
207 	    busdma_lock_mutex, &sc->io_lock, &sc->tx_dma_tag);
208 
209 	error = bus_dmamem_alloc(sc->rx_dma_tag, (void **)&sc->rx_buf,
210 	    BUS_DMA_WAITOK | BUS_DMA_ZERO, &sc->rx_buf_map);
211 	error = bus_dmamap_load(sc->rx_dma_tag, sc->rx_buf_map, sc->rx_buf,
212 	    LLAN_RX_BUF_LEN, llan_rx_load_cb, sc, 0);
213 
214 	/* TX DMA maps */
215 	bus_dmamap_create(sc->tx_dma_tag, 0, &sc->tx_dma_map);
216 
217 	/* RX DMA */
218 	for (i = 0; i < LLAN_MAX_RX_PACKETS; i++) {
219 		error = bus_dmamap_create(sc->rxbuf_dma_tag, 0,
220 		    &sc->rx_xfer[i].rx_dmamap);
221 		sc->rx_xfer[i].rx_mbuf = NULL;
222 	}
223 
224 	/* Attach to network stack */
225 	sc->ifp = if_alloc(IFT_ETHER);
226 	sc->ifp->if_softc = sc;
227 
228 	if_initname(sc->ifp, device_get_name(dev), device_get_unit(dev));
229 	sc->ifp->if_mtu = ETHERMTU; /* XXX max-frame-size from OF? */
230 	sc->ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
231 	sc->ifp->if_hwassist = 0; /* XXX: ibm,illan-options */
232 	sc->ifp->if_capabilities = 0;
233 	sc->ifp->if_capenable = 0;
234 	sc->ifp->if_start = llan_start;
235 	sc->ifp->if_ioctl = llan_ioctl;
236 	sc->ifp->if_init = llan_init;
237 
238 	ifmedia_init(&sc->media, IFM_IMASK, llan_media_change,
239 	    llan_media_status);
240 	ifmedia_add(&sc->media, IFM_ETHER | IFM_AUTO, 0, NULL);
241 	ifmedia_set(&sc->media, IFM_ETHER | IFM_AUTO);
242 
243 	IFQ_SET_MAXLEN(&sc->ifp->if_snd, LLAN_MAX_TX_PACKETS);
244 	sc->ifp->if_snd.ifq_drv_maxlen = LLAN_MAX_TX_PACKETS;
245 	IFQ_SET_READY(&sc->ifp->if_snd);
246 
247 	ether_ifattach(sc->ifp, &sc->mac_address[2]);
248 
249 	/* We don't have link state reporting, so make it always up */
250 	if_link_state_change(sc->ifp, LINK_STATE_UP);
251 
252 	return (0);
253 }
254 
255 static int
256 llan_media_change(struct ifnet *ifp)
257 {
258 	struct llan_softc *sc = ifp->if_softc;
259 
260 	if (IFM_TYPE(sc->media.ifm_media) != IFM_ETHER)
261 		return (EINVAL);
262 
263 	if (IFM_SUBTYPE(sc->media.ifm_media) != IFM_AUTO)
264 		return (EINVAL);
265 
266 	return (0);
267 }
268 
269 static void
270 llan_media_status(struct ifnet *ifp, struct ifmediareq *ifmr)
271 {
272 
273 	ifmr->ifm_status = IFM_AVALID | IFM_ACTIVE | IFM_UNKNOWN | IFM_FDX;
274 	ifmr->ifm_active = IFM_ETHER;
275 }
276 
277 static void
278 llan_rx_load_cb(void *xsc, bus_dma_segment_t *segs, int nsegs, int err)
279 {
280 	struct llan_softc *sc = xsc;
281 
282 	sc->rx_buf_phys = segs[0].ds_addr;
283 	sc->rx_buf_len = segs[0].ds_len - 2*PAGE_SIZE;
284 	sc->input_buf_phys = segs[0].ds_addr + segs[0].ds_len - PAGE_SIZE;
285 	sc->filter_buf_phys = segs[0].ds_addr + segs[0].ds_len - 2*PAGE_SIZE;
286 }
287 
288 static void
289 llan_init(void *xsc)
290 {
291 	struct llan_softc *sc = xsc;
292 	uint64_t rx_buf_desc;
293 	uint64_t macaddr;
294 	int err, i;
295 
296 	mtx_lock(&sc->io_lock);
297 
298 	phyp_hcall(H_FREE_LOGICAL_LAN, sc->unit);
299 
300 	/* Create buffers (page 539) */
301 	sc->rx_dma_slot = 0;
302 	sc->rx_valid_val = 1;
303 
304 	rx_buf_desc = LLAN_BUFDESC_VALID;
305 	rx_buf_desc |= (sc->rx_buf_len << 32);
306 	rx_buf_desc |= sc->rx_buf_phys;
307 	memcpy(&macaddr, sc->mac_address, 8);
308 	err = phyp_hcall(H_REGISTER_LOGICAL_LAN, sc->unit, sc->input_buf_phys,
309 	    rx_buf_desc, sc->filter_buf_phys, macaddr);
310 
311 	for (i = 0; i < LLAN_MAX_RX_PACKETS; i++)
312 		llan_add_rxbuf(sc, &sc->rx_xfer[i]);
313 
314 	phyp_hcall(H_VIO_SIGNAL, sc->unit, 1); /* Enable interrupts */
315 
316 	/* Tell stack we're up */
317 	sc->ifp->if_drv_flags |= IFF_DRV_RUNNING;
318 	sc->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
319 
320 	mtx_unlock(&sc->io_lock);
321 
322 	/* Check for pending receives scheduled before interrupt enable */
323 	llan_intr(sc);
324 }
325 
326 static int
327 llan_add_rxbuf(struct llan_softc *sc, struct llan_xfer *rx)
328 {
329 	struct mbuf *m;
330 	bus_dma_segment_t segs[1];
331 	int error, nsegs;
332 
333 	mtx_assert(&sc->io_lock, MA_OWNED);
334 
335 	m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
336 	if (m == NULL)
337 		return (ENOBUFS);
338 
339 	m->m_len = m->m_pkthdr.len = m->m_ext.ext_size;
340 	if (rx->rx_mbuf != NULL) {
341 		bus_dmamap_sync(sc->rxbuf_dma_tag, rx->rx_dmamap,
342 		    BUS_DMASYNC_POSTREAD);
343 		bus_dmamap_unload(sc->rxbuf_dma_tag, rx->rx_dmamap);
344 	}
345 
346 	/* Save pointer to buffer structure */
347 	m_copyback(m, 0, 8, (void *)&rx);
348 
349 	error = bus_dmamap_load_mbuf_sg(sc->rxbuf_dma_tag, rx->rx_dmamap, m,
350 	    segs, &nsegs, BUS_DMA_NOWAIT);
351 	if (error != 0) {
352 		device_printf(sc->dev,
353 		    "cannot load RX DMA map %p, error = %d\n", rx, error);
354 		m_freem(m);
355 		return (error);
356 	}
357 
358 	/* If nsegs is wrong then the stack is corrupt. */
359 	KASSERT(nsegs == 1,
360 	    ("%s: too many DMA segments (%d)", __func__, nsegs));
361 	rx->rx_mbuf = m;
362 
363 	bus_dmamap_sync(sc->rxbuf_dma_tag, rx->rx_dmamap, BUS_DMASYNC_PREREAD);
364 
365 	rx->rx_bufdesc = LLAN_BUFDESC_VALID;
366 	rx->rx_bufdesc |= (((uint64_t)segs[0].ds_len) << 32);
367 	rx->rx_bufdesc |= segs[0].ds_addr;
368 	error = phyp_hcall(H_ADD_LOGICAL_LAN_BUFFER, sc->unit, rx->rx_bufdesc);
369 	if (error != 0) {
370 		m_freem(m);
371 		rx->rx_mbuf = NULL;
372 		return (ENOBUFS);
373 	}
374 
375         return (0);
376 }
377 
378 static void
379 llan_intr(void *xsc)
380 {
381 	struct llan_softc *sc = xsc;
382 	struct llan_xfer *rx;
383 	struct mbuf *m;
384 
385 	mtx_lock(&sc->io_lock);
386 restart:
387 	phyp_hcall(H_VIO_SIGNAL, sc->unit, 0);
388 
389 	while ((sc->rx_buf[sc->rx_dma_slot].control >> 7) == sc->rx_valid_val) {
390 		rx = (struct llan_xfer *)sc->rx_buf[sc->rx_dma_slot].handle;
391 		m = rx->rx_mbuf;
392 		m_adj(m, sc->rx_buf[sc->rx_dma_slot].offset - 8);
393 		m->m_len = sc->rx_buf[sc->rx_dma_slot].length;
394 
395 		/* llan_add_rxbuf does DMA sync and unload as well as requeue */
396 		if (llan_add_rxbuf(sc, rx) != 0) {
397 			if_inc_counter(sc->ifp, IFCOUNTER_IERRORS, 1);
398 			continue;
399 		}
400 
401 		if_inc_counter(sc->ifp, IFCOUNTER_IPACKETS, 1);
402 		m_adj(m, sc->rx_buf[sc->rx_dma_slot].offset);
403 		m->m_len = sc->rx_buf[sc->rx_dma_slot].length;
404 		m->m_pkthdr.rcvif = sc->ifp;
405 		m->m_pkthdr.len = m->m_len;
406 		sc->rx_dma_slot++;
407 
408 		if (sc->rx_dma_slot >= sc->rx_buf_len/sizeof(sc->rx_buf[0])) {
409 			sc->rx_dma_slot = 0;
410 			sc->rx_valid_val = !sc->rx_valid_val;
411 		}
412 
413 		mtx_unlock(&sc->io_lock);
414 		(*sc->ifp->if_input)(sc->ifp, m);
415 		mtx_lock(&sc->io_lock);
416 	}
417 
418 	phyp_hcall(H_VIO_SIGNAL, sc->unit, 1);
419 
420 	/*
421 	 * H_VIO_SIGNAL enables interrupts for future packets only.
422 	 * Make sure none were queued between the end of the loop and the
423 	 * enable interrupts call.
424 	 */
425 	if ((sc->rx_buf[sc->rx_dma_slot].control >> 7) == sc->rx_valid_val)
426 		goto restart;
427 
428 	mtx_unlock(&sc->io_lock);
429 }
430 
431 static void
432 llan_send_packet(void *xsc, bus_dma_segment_t *segs, int nsegs,
433     bus_size_t mapsize, int error)
434 {
435 	struct llan_softc *sc = xsc;
436 	uint64_t bufdescs[6];
437 	int i, err;
438 
439 	bzero(bufdescs, sizeof(bufdescs));
440 
441 	for (i = 0; i < nsegs; i++) {
442 		bufdescs[i] = LLAN_BUFDESC_VALID;
443 		bufdescs[i] |= (((uint64_t)segs[i].ds_len) << 32);
444 		bufdescs[i] |= segs[i].ds_addr;
445 	}
446 
447 	err = phyp_hcall(H_SEND_LOGICAL_LAN, sc->unit, bufdescs[0],
448 	    bufdescs[1], bufdescs[2], bufdescs[3], bufdescs[4], bufdescs[5], 0);
449 	/*
450 	 * The hypercall returning implies completion -- or that the call will
451 	 * not complete. In principle, we should try a few times if we get back
452 	 * H_BUSY based on the continuation token in R4. For now, just drop
453 	 * the packet in such cases.
454 	 */
455 	if (err == H_SUCCESS)
456 		if_inc_counter(sc->ifp, IFCOUNTER_OPACKETS, 1);
457 	else
458 		if_inc_counter(sc->ifp, IFCOUNTER_OERRORS, 1);
459 }
460 
461 static void
462 llan_start_locked(struct ifnet *ifp)
463 {
464 	struct llan_softc *sc = ifp->if_softc;
465 	bus_addr_t first;
466 	int nsegs;
467 	struct mbuf *mb_head, *m;
468 
469 	mtx_assert(&sc->io_lock, MA_OWNED);
470 	first = 0;
471 
472 	if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
473 	    IFF_DRV_RUNNING)
474 		return;
475 
476 	while (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) {
477 		IFQ_DRV_DEQUEUE(&ifp->if_snd, mb_head);
478 
479 		if (mb_head == NULL)
480 			break;
481 
482 		BPF_MTAP(ifp, mb_head);
483 
484 		for (m = mb_head, nsegs = 0; m != NULL; m = m->m_next)
485 			nsegs++;
486 		if (nsegs > 6) {
487 			m = m_collapse(mb_head, M_NOWAIT, 6);
488 			if (m == NULL) {
489 				m_freem(mb_head);
490 				continue;
491 			}
492 		}
493 
494 		bus_dmamap_load_mbuf(sc->tx_dma_tag, sc->tx_dma_map,
495 			mb_head, llan_send_packet, sc, 0);
496 		bus_dmamap_unload(sc->tx_dma_tag, sc->tx_dma_map);
497 		m_freem(mb_head);
498 	}
499 }
500 
501 static void
502 llan_start(struct ifnet *ifp)
503 {
504 	struct llan_softc *sc = ifp->if_softc;
505 
506 	mtx_lock(&sc->io_lock);
507 	llan_start_locked(ifp);
508 	mtx_unlock(&sc->io_lock);
509 }
510 
511 static int
512 llan_set_multicast(struct llan_softc *sc)
513 {
514 	struct ifnet *ifp = sc->ifp;
515 	struct ifmultiaddr *inm;
516 	uint64_t macaddr = 0;
517 
518 	mtx_assert(&sc->io_lock, MA_OWNED);
519 
520 	phyp_hcall(H_MULTICAST_CTRL, sc->unit, LLAN_CLEAR_MULTICAST, 0);
521 
522 	if_maddr_rlock(ifp);
523 	CK_STAILQ_FOREACH(inm, &ifp->if_multiaddrs, ifma_link) {
524 		if (inm->ifma_addr->sa_family != AF_LINK)
525 			continue;
526 
527 		memcpy((uint8_t *)&macaddr + 2,
528 		    LLADDR((struct sockaddr_dl *)inm->ifma_addr), 6);
529 		phyp_hcall(H_MULTICAST_CTRL, sc->unit, LLAN_ADD_MULTICAST,
530 		    macaddr);
531 	}
532 	if_maddr_runlock(ifp);
533 
534 	return (0);
535 }
536 
537 static int
538 llan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
539 {
540 	int err = 0;
541 	struct llan_softc *sc = ifp->if_softc;
542 
543 	switch (cmd) {
544 	case SIOCADDMULTI:
545 	case SIOCDELMULTI:
546 		mtx_lock(&sc->io_lock);
547 		if ((sc->ifp->if_drv_flags & IFF_DRV_RUNNING) != 0)
548 			llan_set_multicast(sc);
549 		mtx_unlock(&sc->io_lock);
550 		break;
551 	case SIOCGIFMEDIA:
552 	case SIOCSIFMEDIA:
553 		err = ifmedia_ioctl(ifp, (struct ifreq *)data, &sc->media, cmd);
554 		break;
555 	case SIOCSIFFLAGS:
556 	default:
557 		err = ether_ioctl(ifp, cmd, data);
558 		break;
559 	}
560 
561 	return (err);
562 }
563 
564