1/* $NetBSD: if_cdce.c,v 1.42 2016/06/10 13:27:15 ozaki-r Exp $ */
2
3/*
4 * Copyright (c) 1997, 1998, 1999, 2000-2003 Bill Paul <wpaul@windriver.com>
5 * Copyright (c) 2003 Craig Boston
6 * Copyright (c) 2004 Daniel Hartmeier
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by Bill Paul.
20 * 4. Neither the name of the author nor the names of any co-contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul, THE VOICES IN HIS HEAD OR
28 * THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
29 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
30 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
31 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
32 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
33 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
34 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 */
36
37/*
38 * USB Communication Device Class (Ethernet Networking Control Model)
39 * http://www.usb.org/developers/devclass_docs/usbcdc11.pdf
40 *
41 */
42
43#include <sys/cdefs.h>
44__KERNEL_RCSID(0, "$NetBSD: if_cdce.c,v 1.42 2016/06/10 13:27:15 ozaki-r Exp $");
45
46#ifdef _KERNEL_OPT
47#include "opt_inet.h"
48#endif
49
50#include <sys/param.h>
51#include <sys/systm.h>
52#include <sys/sockio.h>
53#include <sys/mbuf.h>
54#include <sys/kernel.h>
55#include <sys/socket.h>
56#include <sys/device.h>
57
58#include <net/if.h>
59#include <net/if_arp.h>
60#include <net/if_dl.h>
61#include <net/if_media.h>
62
63#include <net/bpf.h>
64
65#include <net/if_ether.h>
66#ifdef INET
67#include <netinet/in.h>
68#include <netinet/if_inarp.h>
69#endif
70
71
72
73#include <dev/usb/usb.h>
74#include <dev/usb/usbdi.h>
75#include <dev/usb/usbdi_util.h>
76#include <dev/usb/usbdevs.h>
77#include <dev/usb/usbcdc.h>
78
79#include <dev/usb/if_cdcereg.h>
80
81Static int cdce_tx_list_init(struct cdce_softc *);
82Static int cdce_rx_list_init(struct cdce_softc *);
83Static int cdce_newbuf(struct cdce_softc *, struct cdce_chain *,
84 struct mbuf *);
85Static int cdce_encap(struct cdce_softc *, struct mbuf *, int);
86Static void cdce_rxeof(struct usbd_xfer *, void *, usbd_status);
87Static void cdce_txeof(struct usbd_xfer *, void *, usbd_status);
88Static void cdce_start(struct ifnet *);
89Static int cdce_ioctl(struct ifnet *, u_long, void *);
90Static void cdce_init(void *);
91Static void cdce_watchdog(struct ifnet *);
92Static void cdce_stop(struct cdce_softc *);
93
94Static const struct cdce_type cdce_devs[] = {
95 {{ USB_VENDOR_ACERLABS, USB_PRODUCT_ACERLABS_M5632 }, CDCE_NO_UNION },
96 {{ USB_VENDOR_COMPAQ, USB_PRODUCT_COMPAQ_IPAQLINUX }, CDCE_NO_UNION },
97 {{ USB_VENDOR_GMATE, USB_PRODUCT_GMATE_YP3X00 }, CDCE_NO_UNION },
98 {{ USB_VENDOR_MOTOROLA2, USB_PRODUCT_MOTOROLA2_USBLAN }, CDCE_ZAURUS | CDCE_NO_UNION },
99 {{ USB_VENDOR_MOTOROLA2, USB_PRODUCT_MOTOROLA2_USBLAN2 }, CDCE_ZAURUS | CDCE_NO_UNION },
100 {{ USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2501 }, CDCE_NO_UNION },
101 {{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_SL5500 }, CDCE_ZAURUS },
102 {{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_A300 }, CDCE_ZAURUS | CDCE_NO_UNION },
103 {{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_SL5600 }, CDCE_ZAURUS | CDCE_NO_UNION },
104 {{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_C700 }, CDCE_ZAURUS | CDCE_NO_UNION },
105 {{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_C750 }, CDCE_ZAURUS | CDCE_NO_UNION },
106};
107#define cdce_lookup(v, p) \
108 ((const struct cdce_type *)usb_lookup(cdce_devs, v, p))
109
110int cdce_match(device_t, cfdata_t, void *);
111void cdce_attach(device_t, device_t, void *);
112int cdce_detach(device_t, int);
113int cdce_activate(device_t, enum devact);
114extern struct cfdriver cdce_cd;
115CFATTACH_DECL_NEW(cdce, sizeof(struct cdce_softc), cdce_match, cdce_attach,
116 cdce_detach, cdce_activate);
117
118int
119cdce_match(device_t parent, cfdata_t match, void *aux)
120{
121 struct usbif_attach_arg *uiaa = aux;
122
123 if (cdce_lookup(uiaa->uiaa_vendor, uiaa->uiaa_product) != NULL)
124 return UMATCH_VENDOR_PRODUCT;
125
126 if (uiaa->uiaa_class == UICLASS_CDC && uiaa->uiaa_subclass ==
127 UISUBCLASS_ETHERNET_NETWORKING_CONTROL_MODEL)
128 return UMATCH_IFACECLASS_GENERIC;
129
130 return UMATCH_NONE;
131}
132
133void
134cdce_attach(device_t parent, device_t self, void *aux)
135{
136 struct cdce_softc *sc = device_private(self);
137 struct usbif_attach_arg *uiaa = aux;
138 char *devinfop;
139 int s;
140 struct ifnet *ifp;
141 struct usbd_device *dev = uiaa->uiaa_device;
142 const struct cdce_type *t;
143 usb_interface_descriptor_t *id;
144 usb_endpoint_descriptor_t *ed;
145 const usb_cdc_union_descriptor_t *ud;
146 usb_config_descriptor_t *cd;
147 int data_ifcno;
148 int i, j, numalts;
149 u_char eaddr[ETHER_ADDR_LEN];
150 const usb_cdc_ethernet_descriptor_t *ue;
151 char eaddr_str[USB_MAX_ENCODED_STRING_LEN];
152
153 sc->cdce_dev = self;
154
155 aprint_naive("\n");
156 aprint_normal("\n");
157
158 devinfop = usbd_devinfo_alloc(dev, 0);
159 aprint_normal_dev(self, "%s\n", devinfop);
160 usbd_devinfo_free(devinfop);
161
162 sc->cdce_udev = uiaa->uiaa_device;
163 sc->cdce_ctl_iface = uiaa->uiaa_iface;
164
165 t = cdce_lookup(uiaa->uiaa_vendor, uiaa->uiaa_product);
166 if (t)
167 sc->cdce_flags = t->cdce_flags;
168
169 if (sc->cdce_flags & CDCE_NO_UNION)
170 sc->cdce_data_iface = sc->cdce_ctl_iface;
171 else {
172 ud = (const usb_cdc_union_descriptor_t *)usb_find_desc(sc->cdce_udev,
173 UDESC_CS_INTERFACE, UDESCSUB_CDC_UNION);
174 if (ud == NULL) {
175 aprint_error_dev(self, "no union descriptor\n");
176 return;
177 }
178 data_ifcno = ud->bSlaveInterface[0];
179
180 for (i = 0; i < uiaa->uiaa_nifaces; i++) {
181 if (uiaa->uiaa_ifaces[i] != NULL) {
182 id = usbd_get_interface_descriptor(
183 uiaa->uiaa_ifaces[i]);
184 if (id != NULL && id->bInterfaceNumber ==
185 data_ifcno) {
186 sc->cdce_data_iface = uiaa->uiaa_ifaces[i];
187 uiaa->uiaa_ifaces[i] = NULL;
188 }
189 }
190 }
191 }
192
193 if (sc->cdce_data_iface == NULL) {
194 aprint_error_dev(self, "no data interface\n");
195 return;
196 }
197
198 /*
199 * <quote>
200 * The Data Class interface of a networking device shall have a minimum
201 * of two interface settings. The first setting (the default interface
202 * setting) includes no endpoints and therefore no networking traffic is
203 * exchanged whenever the default interface setting is selected. One or
204 * more additional interface settings are used for normal operation, and
205 * therefore each includes a pair of endpoints (one IN, and one OUT) to
206 * exchange network traffic. Select an alternate interface setting to
207 * initialize the network aspects of the device and to enable the
208 * exchange of network traffic.
209 * </quote>
210 *
211 * Some devices, most notably cable modems, include interface settings
212 * that have no IN or OUT endpoint, therefore loop through the list of all
213 * available interface settings looking for one with both IN and OUT
214 * endpoints.
215 */
216 id = usbd_get_interface_descriptor(sc->cdce_data_iface);
217 cd = usbd_get_config_descriptor(sc->cdce_udev);
218 numalts = usbd_get_no_alts(cd, id->bInterfaceNumber);
219
220 for (j = 0; j < numalts; j++) {
221 if (usbd_set_interface(sc->cdce_data_iface, j)) {
222 aprint_error_dev(sc->cdce_dev,
223 "setting alternate interface failed\n");
224 return;
225 }
226 /* Find endpoints. */
227 id = usbd_get_interface_descriptor(sc->cdce_data_iface);
228 sc->cdce_bulkin_no = sc->cdce_bulkout_no = -1;
229 for (i = 0; i < id->bNumEndpoints; i++) {
230 ed = usbd_interface2endpoint_descriptor(sc->cdce_data_iface, i);
231 if (!ed) {
232 aprint_error_dev(self,
233 "could not read endpoint descriptor\n");
234 return;
235 }
236 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
237 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
238 sc->cdce_bulkin_no = ed->bEndpointAddress;
239 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
240 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
241 sc->cdce_bulkout_no = ed->bEndpointAddress;
242 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
243 UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) {
244 /* XXX: CDC spec defines an interrupt pipe, but it is not
245 * needed for simple host-to-host applications. */
246 } else {
247 aprint_error_dev(self, "unexpected endpoint\n");
248 }
249 }
250 /* If we found something, try and use it... */
251 if ((sc->cdce_bulkin_no != -1) && (sc->cdce_bulkout_no != -1))
252 break;
253 }
254
255 if (sc->cdce_bulkin_no == -1) {
256 aprint_error_dev(self, "could not find data bulk in\n");
257 return;
258 }
259 if (sc->cdce_bulkout_no == -1 ) {
260 aprint_error_dev(self, "could not find data bulk out\n");
261 return;
262 }
263
264 ue = (const usb_cdc_ethernet_descriptor_t *)usb_find_desc(dev,
265 UDESC_CS_INTERFACE, UDESCSUB_CDC_ENF);
266 if (!ue || usbd_get_string(dev, ue->iMacAddress, eaddr_str) ||
267 ether_aton_r(eaddr, sizeof(eaddr), eaddr_str)) {
268 aprint_normal_dev(self, "faking address\n");
269 eaddr[0]= 0x2a;
270 memcpy(&eaddr[1], &hardclock_ticks, sizeof(uint32_t));
271 eaddr[5] = (uint8_t)(device_unit(sc->cdce_dev));
272 }
273
274 s = splnet();
275
276 aprint_normal_dev(self, "address %s\n", ether_sprintf(eaddr));
277
278 ifp = GET_IFP(sc);
279 ifp->if_softc = sc;
280 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
281 ifp->if_ioctl = cdce_ioctl;
282 ifp->if_start = cdce_start;
283 ifp->if_watchdog = cdce_watchdog;
284 strncpy(ifp->if_xname, device_xname(sc->cdce_dev), IFNAMSIZ);
285
286 IFQ_SET_READY(&ifp->if_snd);
287
288 if_attach(ifp);
289 ether_ifattach(ifp, eaddr);
290
291 sc->cdce_attached = 1;
292 splx(s);
293
294 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->cdce_udev,
295 sc->cdce_dev);
296
297 if (!pmf_device_register(self, NULL, NULL))
298 aprint_error_dev(self, "couldn't establish power handler\n");
299
300 return;
301}
302
303int
304cdce_detach(device_t self, int flags)
305{
306 struct cdce_softc *sc = device_private(self);
307 struct ifnet *ifp = GET_IFP(sc);
308 int s;
309
310 pmf_device_deregister(self);
311
312 s = splusb();
313
314 if (!sc->cdce_attached) {
315 splx(s);
316 return 0;
317 }
318
319 if (ifp->if_flags & IFF_RUNNING)
320 cdce_stop(sc);
321
322 ether_ifdetach(ifp);
323
324 if_detach(ifp);
325
326 sc->cdce_attached = 0;
327 splx(s);
328
329 return 0;
330}
331
332Static void
333cdce_start(struct ifnet *ifp)
334{
335 struct cdce_softc *sc = ifp->if_softc;
336 struct mbuf *m_head = NULL;
337
338 if (sc->cdce_dying || (ifp->if_flags & IFF_OACTIVE))
339 return;
340
341 IFQ_POLL(&ifp->if_snd, m_head);
342 if (m_head == NULL)
343 return;
344
345 if (cdce_encap(sc, m_head, 0)) {
346 ifp->if_flags |= IFF_OACTIVE;
347 return;
348 }
349
350 IFQ_DEQUEUE(&ifp->if_snd, m_head);
351
352 bpf_mtap(ifp, m_head);
353
354 ifp->if_flags |= IFF_OACTIVE;
355
356 ifp->if_timer = 6;
357}
358
359Static int
360cdce_encap(struct cdce_softc *sc, struct mbuf *m, int idx)
361{
362 struct cdce_chain *c;
363 usbd_status err;
364 int extra = 0;
365
366 c = &sc->cdce_cdata.cdce_tx_chain[idx];
367
368 m_copydata(m, 0, m->m_pkthdr.len, c->cdce_buf);
369 if (sc->cdce_flags & CDCE_ZAURUS) {
370 /* Zaurus wants a 32-bit CRC appended to every frame */
371 uint32_t crc;
372
373 crc = htole32(~ether_crc32_le(c->cdce_buf, m->m_pkthdr.len));
374 memcpy(c->cdce_buf + m->m_pkthdr.len, &crc, sizeof(crc));
375 extra = sizeof(crc);
376 }
377 c->cdce_mbuf = m;
378
379 usbd_setup_xfer(c->cdce_xfer, c, c->cdce_buf, m->m_pkthdr.len + extra,
380 USBD_FORCE_SHORT_XFER, 10000, cdce_txeof);
381 err = usbd_transfer(c->cdce_xfer);
382 if (err != USBD_IN_PROGRESS) {
383 cdce_stop(sc);
384 return EIO;
385 }
386
387 sc->cdce_cdata.cdce_tx_cnt++;
388
389 return 0;
390}
391
392Static void
393cdce_stop(struct cdce_softc *sc)
394{
395 usbd_status err;
396 struct ifnet *ifp = GET_IFP(sc);
397 int i;
398
399 ifp->if_timer = 0;
400
401 if (sc->cdce_bulkin_pipe != NULL) {
402 err = usbd_abort_pipe(sc->cdce_bulkin_pipe);
403 if (err)
404 printf("%s: abort rx pipe failed: %s\n",
405 device_xname(sc->cdce_dev), usbd_errstr(err));
406 }
407
408 if (sc->cdce_bulkout_pipe != NULL) {
409 err = usbd_abort_pipe(sc->cdce_bulkout_pipe);
410 if (err)
411 printf("%s: abort tx pipe failed: %s\n",
412 device_xname(sc->cdce_dev), usbd_errstr(err));
413 }
414
415 for (i = 0; i < CDCE_RX_LIST_CNT; i++) {
416 if (sc->cdce_cdata.cdce_rx_chain[i].cdce_mbuf != NULL) {
417 m_freem(sc->cdce_cdata.cdce_rx_chain[i].cdce_mbuf);
418 sc->cdce_cdata.cdce_rx_chain[i].cdce_mbuf = NULL;
419 }
420 if (sc->cdce_cdata.cdce_rx_chain[i].cdce_xfer != NULL) {
421 usbd_destroy_xfer
422 (sc->cdce_cdata.cdce_rx_chain[i].cdce_xfer);
423 sc->cdce_cdata.cdce_rx_chain[i].cdce_xfer = NULL;
424 }
425 }
426
427 for (i = 0; i < CDCE_TX_LIST_CNT; i++) {
428 if (sc->cdce_cdata.cdce_tx_chain[i].cdce_mbuf != NULL) {
429 m_freem(sc->cdce_cdata.cdce_tx_chain[i].cdce_mbuf);
430 sc->cdce_cdata.cdce_tx_chain[i].cdce_mbuf = NULL;
431 }
432 if (sc->cdce_cdata.cdce_tx_chain[i].cdce_xfer != NULL) {
433 usbd_destroy_xfer(
434 sc->cdce_cdata.cdce_tx_chain[i].cdce_xfer);
435 sc->cdce_cdata.cdce_tx_chain[i].cdce_xfer = NULL;
436 }
437 }
438
439 if (sc->cdce_bulkin_pipe != NULL) {
440 err = usbd_close_pipe(sc->cdce_bulkin_pipe);
441 if (err)
442 printf("%s: close rx pipe failed: %s\n",
443 device_xname(sc->cdce_dev), usbd_errstr(err));
444 sc->cdce_bulkin_pipe = NULL;
445 }
446
447 if (sc->cdce_bulkout_pipe != NULL) {
448 err = usbd_close_pipe(sc->cdce_bulkout_pipe);
449 if (err)
450 printf("%s: close tx pipe failed: %s\n",
451 device_xname(sc->cdce_dev), usbd_errstr(err));
452 sc->cdce_bulkout_pipe = NULL;
453 }
454
455 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
456}
457
458Static int
459cdce_ioctl(struct ifnet *ifp, u_long command, void *data)
460{
461 struct cdce_softc *sc = ifp->if_softc;
462 struct ifaddr *ifa = (struct ifaddr *)data;
463 struct ifreq *ifr = (struct ifreq *)data;
464 int s, error = 0;
465
466 if (sc->cdce_dying)
467 return EIO;
468
469 s = splnet();
470
471 switch(command) {
472 case SIOCINITIFADDR:
473 ifp->if_flags |= IFF_UP;
474 cdce_init(sc);
475 switch (ifa->ifa_addr->sa_family) {
476#ifdef INET
477 case AF_INET:
478 arp_ifinit(ifp, ifa);
479 break;
480#endif /* INET */
481 }
482 break;
483
484 case SIOCSIFMTU:
485 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > ETHERMTU)
486 error = EINVAL;
487 else if ((error = ifioctl_common(ifp, command, data)) == ENETRESET)
488 error = 0;
489 break;
490
491 case SIOCSIFFLAGS:
492 if ((error = ifioctl_common(ifp, command, data)) != 0)
493 break;
494 /* XXX re-use ether_ioctl() */
495 switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) {
496 case IFF_UP:
497 cdce_init(sc);
498 break;
499 case IFF_RUNNING:
500 cdce_stop(sc);
501 break;
502 default:
503 break;
504 }
505 break;
506
507 default:
508 error = ether_ioctl(ifp, command, data);
509 break;
510 }
511
512 splx(s);
513
514 if (error == ENETRESET)
515 error = 0;
516
517 return error;
518}
519
520Static void
521cdce_watchdog(struct ifnet *ifp)
522{
523 struct cdce_softc *sc = ifp->if_softc;
524
525 if (sc->cdce_dying)
526 return;
527
528 ifp->if_oerrors++;
529 printf("%s: watchdog timeout\n", device_xname(sc->cdce_dev));
530}
531
532Static void
533cdce_init(void *xsc)
534{
535 struct cdce_softc *sc = xsc;
536 struct ifnet *ifp = GET_IFP(sc);
537 struct cdce_chain *c;
538 usbd_status err;
539 int s, i;
540
541 if (ifp->if_flags & IFF_RUNNING)
542 return;
543
544 s = splnet();
545
546 /* Maybe set multicast / broadcast here??? */
547
548 err = usbd_open_pipe(sc->cdce_data_iface, sc->cdce_bulkin_no,
549 USBD_EXCLUSIVE_USE, &sc->cdce_bulkin_pipe);
550 if (err) {
551 printf("%s: open rx pipe failed: %s\n", device_xname(sc->cdce_dev),
552 usbd_errstr(err));
553 splx(s);
554 return;
555 }
556
557 err = usbd_open_pipe(sc->cdce_data_iface, sc->cdce_bulkout_no,
558 USBD_EXCLUSIVE_USE, &sc->cdce_bulkout_pipe);
559 if (err) {
560 printf("%s: open tx pipe failed: %s\n",
561 device_xname(sc->cdce_dev), usbd_errstr(err));
562 splx(s);
563 return;
564 }
565
566 if (cdce_tx_list_init(sc)) {
567 printf("%s: tx list init failed\n", device_xname(sc->cdce_dev));
568 splx(s);
569 return;
570 }
571
572 if (cdce_rx_list_init(sc)) {
573 printf("%s: rx list init failed\n", device_xname(sc->cdce_dev));
574 splx(s);
575 return;
576 }
577
578 for (i = 0; i < CDCE_RX_LIST_CNT; i++) {
579 c = &sc->cdce_cdata.cdce_rx_chain[i];
580
581 usbd_setup_xfer(c->cdce_xfer, c, c->cdce_buf, CDCE_BUFSZ,
582 USBD_SHORT_XFER_OK, USBD_NO_TIMEOUT, cdce_rxeof);
583 usbd_transfer(c->cdce_xfer);
584 }
585
586 ifp->if_flags |= IFF_RUNNING;
587 ifp->if_flags &= ~IFF_OACTIVE;
588
589 splx(s);
590}
591
592Static int
593cdce_newbuf(struct cdce_softc *sc, struct cdce_chain *c, struct mbuf *m)
594{
595 struct mbuf *m_new = NULL;
596
597 if (m == NULL) {
598 MGETHDR(m_new, M_DONTWAIT, MT_DATA);
599 if (m_new == NULL) {
600 printf("%s: no memory for rx list "
601 "-- packet dropped!\n", device_xname(sc->cdce_dev));
602 return ENOBUFS;
603 }
604 MCLGET(m_new, M_DONTWAIT);
605 if (!(m_new->m_flags & M_EXT)) {
606 printf("%s: no memory for rx list "
607 "-- packet dropped!\n", device_xname(sc->cdce_dev));
608 m_freem(m_new);
609 return ENOBUFS;
610 }
611 m_new->m_len = m_new->m_pkthdr.len = MCLBYTES;
612 } else {
613 m_new = m;
614 m_new->m_len = m_new->m_pkthdr.len = MCLBYTES;
615 m_new->m_data = m_new->m_ext.ext_buf;
616 }
617 c->cdce_mbuf = m_new;
618 return 0;
619}
620
621Static int
622cdce_rx_list_init(struct cdce_softc *sc)
623{
624 struct cdce_cdata *cd;
625 struct cdce_chain *c;
626 int i;
627
628 cd = &sc->cdce_cdata;
629 for (i = 0; i < CDCE_RX_LIST_CNT; i++) {
630 c = &cd->cdce_rx_chain[i];
631 c->cdce_sc = sc;
632 c->cdce_idx = i;
633 if (cdce_newbuf(sc, c, NULL) == ENOBUFS)
634 return ENOBUFS;
635 if (c->cdce_xfer == NULL) {
636 int err = usbd_create_xfer(sc->cdce_bulkin_pipe,
637 CDCE_BUFSZ, USBD_SHORT_XFER_OK, 0, &c->cdce_xfer);
638 if (err)
639 return err;
640 c->cdce_buf = usbd_get_buffer(c->cdce_xfer);
641 }
642 }
643
644 return 0;
645}
646
647Static int
648cdce_tx_list_init(struct cdce_softc *sc)
649{
650 struct cdce_cdata *cd;
651 struct cdce_chain *c;
652 int i;
653
654 cd = &sc->cdce_cdata;
655 for (i = 0; i < CDCE_TX_LIST_CNT; i++) {
656 c = &cd->cdce_tx_chain[i];
657 c->cdce_sc = sc;
658 c->cdce_idx = i;
659 c->cdce_mbuf = NULL;
660 if (c->cdce_xfer == NULL) {
661 int err = usbd_create_xfer(sc->cdce_bulkout_pipe,
662 CDCE_BUFSZ, USBD_FORCE_SHORT_XFER, 0,
663 &c->cdce_xfer);
664 if (err)
665 return err;
666 c->cdce_buf = usbd_get_buffer(c->cdce_xfer);
667 }
668 }
669
670 return 0;
671}
672
673Static void
674cdce_rxeof(struct usbd_xfer *xfer, void *priv, usbd_status status)
675{
676 struct cdce_chain *c = priv;
677 struct cdce_softc *sc = c->cdce_sc;
678 struct ifnet *ifp = GET_IFP(sc);
679 struct mbuf *m;
680 int total_len = 0;
681 int s;
682
683 if (sc->cdce_dying || !(ifp->if_flags & IFF_RUNNING))
684 return;
685
686 if (status != USBD_NORMAL_COMPLETION) {
687 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED)
688 return;
689 if (sc->cdce_rxeof_errors == 0)
690 printf("%s: usb error on rx: %s\n",
691 device_xname(sc->cdce_dev), usbd_errstr(status));
692 if (status == USBD_STALLED)
693 usbd_clear_endpoint_stall_async(sc->cdce_bulkin_pipe);
694 DELAY(sc->cdce_rxeof_errors * 10000);
695 sc->cdce_rxeof_errors++;
696 goto done;
697 }
698
699 sc->cdce_rxeof_errors = 0;
700
701 usbd_get_xfer_status(xfer, NULL, NULL, &total_len, NULL);
702 if (sc->cdce_flags & CDCE_ZAURUS)
703 total_len -= 4; /* Strip off CRC added by Zaurus */
704 if (total_len <= 1)
705 goto done;
706
707 m = c->cdce_mbuf;
708 memcpy(mtod(m, char *), c->cdce_buf, total_len);
709
710 if (total_len < sizeof(struct ether_header)) {
711 ifp->if_ierrors++;
712 goto done;
713 }
714
715 ifp->if_ipackets++;
716 m->m_pkthdr.len = m->m_len = total_len;
717 m_set_rcvif(m, ifp);
718
719 s = splnet();
720
721 if (cdce_newbuf(sc, c, NULL) == ENOBUFS) {
722 ifp->if_ierrors++;
723 goto done1;
724 }
725
726 bpf_mtap(ifp, m);
727
728 if_percpuq_enqueue((ifp)->if_percpuq, (m));
729
730done1:
731 splx(s);
732
733done:
734 /* Setup new transfer. */
735 usbd_setup_xfer(c->cdce_xfer, c, c->cdce_buf, CDCE_BUFSZ,
736 USBD_SHORT_XFER_OK, USBD_NO_TIMEOUT, cdce_rxeof);
737 usbd_transfer(c->cdce_xfer);
738}
739
740Static void
741cdce_txeof(struct usbd_xfer *xfer, void *priv,
742 usbd_status status)
743{
744 struct cdce_chain *c = priv;
745 struct cdce_softc *sc = c->cdce_sc;
746 struct ifnet *ifp = GET_IFP(sc);
747 usbd_status err;
748 int s;
749
750 if (sc->cdce_dying)
751 return;
752
753 s = splnet();
754
755 ifp->if_timer = 0;
756 ifp->if_flags &= ~IFF_OACTIVE;
757
758 if (status != USBD_NORMAL_COMPLETION) {
759 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) {
760 splx(s);
761 return;
762 }
763 ifp->if_oerrors++;
764 printf("%s: usb error on tx: %s\n", device_xname(sc->cdce_dev),
765 usbd_errstr(status));
766 if (status == USBD_STALLED)
767 usbd_clear_endpoint_stall_async(sc->cdce_bulkout_pipe);
768 splx(s);
769 return;
770 }
771
772 usbd_get_xfer_status(c->cdce_xfer, NULL, NULL, NULL, &err);
773
774 if (c->cdce_mbuf != NULL) {
775 m_freem(c->cdce_mbuf);
776 c->cdce_mbuf = NULL;
777 }
778
779 if (err)
780 ifp->if_oerrors++;
781 else
782 ifp->if_opackets++;
783
784 if (IFQ_IS_EMPTY(&ifp->if_snd) == 0)
785 cdce_start(ifp);
786
787 splx(s);
788}
789
790int
791cdce_activate(device_t self, enum devact act)
792{
793 struct cdce_softc *sc = device_private(self);
794
795 switch (act) {
796 case DVACT_DEACTIVATE:
797 if_deactivate(GET_IFP(sc));
798 sc->cdce_dying = 1;
799 return 0;
800 default:
801 return EOPNOTSUPP;
802 }
803}
804