/* $NetBSD: if_cdce.c,v 1.38.12.1 2017/04/05 19:54:19 snj Exp $ */ /* * Copyright (c) 1997, 1998, 1999, 2000-2003 Bill Paul * Copyright (c) 2003 Craig Boston * Copyright (c) 2004 Daniel Hartmeier * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Bill Paul. * 4. Neither the name of the author nor the names of any co-contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul, THE VOICES IN HIS HEAD OR * THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * USB Communication Device Class (Ethernet Networking Control Model) * http://www.usb.org/developers/devclass_docs/usbcdc11.pdf * */ #include __KERNEL_RCSID(0, "$NetBSD: if_cdce.c,v 1.38.12.1 2017/04/05 19:54:19 snj Exp $"); #ifdef _KERNEL_OPT #include "opt_inet.h" #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #include #endif #include #include #include #include #include #include Static int cdce_tx_list_init(struct cdce_softc *); Static void cdce_tx_list_free(struct cdce_softc *); Static int cdce_rx_list_init(struct cdce_softc *); Static void cdce_rx_list_free(struct cdce_softc *); Static int cdce_newbuf(struct cdce_softc *, struct cdce_chain *, struct mbuf *); Static int cdce_encap(struct cdce_softc *, struct mbuf *, int); Static void cdce_rxeof(struct usbd_xfer *, void *, usbd_status); Static void cdce_txeof(struct usbd_xfer *, void *, usbd_status); Static void cdce_start(struct ifnet *); Static void cdce_start_locked(struct ifnet *); Static int cdce_ioctl(struct ifnet *, u_long, void *); Static int cdce_init(struct ifnet *); Static int cdce_init_locked(struct ifnet *); Static void cdce_watchdog(struct ifnet *); Static void cdce_stop(struct ifnet *, int); Static void cdce_stop_locked(struct ifnet *, int); Static const struct cdce_type cdce_devs[] = { {{ USB_VENDOR_ACERLABS, USB_PRODUCT_ACERLABS_M5632 }, CDCE_NO_UNION }, {{ USB_VENDOR_COMPAQ, USB_PRODUCT_COMPAQ_IPAQLINUX }, CDCE_NO_UNION }, {{ USB_VENDOR_GMATE, USB_PRODUCT_GMATE_YP3X00 }, CDCE_NO_UNION }, {{ USB_VENDOR_MOTOROLA2, USB_PRODUCT_MOTOROLA2_USBLAN }, CDCE_ZAURUS | CDCE_NO_UNION }, {{ USB_VENDOR_MOTOROLA2, USB_PRODUCT_MOTOROLA2_USBLAN2 }, CDCE_ZAURUS | CDCE_NO_UNION }, {{ USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2501 }, CDCE_NO_UNION }, {{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_SL5500 }, CDCE_ZAURUS }, {{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_A300 }, CDCE_ZAURUS | CDCE_NO_UNION }, {{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_SL5600 }, CDCE_ZAURUS | CDCE_NO_UNION }, {{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_C700 }, CDCE_ZAURUS | CDCE_NO_UNION }, {{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_C750 }, CDCE_ZAURUS | CDCE_NO_UNION }, }; #define cdce_lookup(v, p) \ ((const struct cdce_type *)usb_lookup(cdce_devs, v, p)) int cdce_match(device_t, cfdata_t, void *); void cdce_attach(device_t, device_t, void *); int cdce_detach(device_t, int); int cdce_activate(device_t, enum devact); extern struct cfdriver cdce_cd; CFATTACH_DECL_NEW(cdce, sizeof(struct cdce_softc), cdce_match, cdce_attach, cdce_detach, cdce_activate); int cdce_match(device_t parent, cfdata_t match, void *aux) { struct usbif_attach_arg *uiaa = aux; if (cdce_lookup(uiaa->uiaa_vendor, uiaa->uiaa_product) != NULL) return UMATCH_VENDOR_PRODUCT; if (uiaa->uiaa_class == UICLASS_CDC && uiaa->uiaa_subclass == UISUBCLASS_ETHERNET_NETWORKING_CONTROL_MODEL) return UMATCH_IFACECLASS_GENERIC; return UMATCH_NONE; } void cdce_attach(device_t parent, device_t self, void *aux) { struct cdce_softc *sc = device_private(self); struct usbif_attach_arg *uiaa = aux; char *devinfop; struct ifnet *ifp; struct usbd_device *dev = uiaa->uiaa_device; const struct cdce_type *t; usb_interface_descriptor_t *id; usb_endpoint_descriptor_t *ed; const usb_cdc_union_descriptor_t *ud; usb_config_descriptor_t *cd; int data_ifcno; int i, j, numalts; u_char eaddr[ETHER_ADDR_LEN]; const usb_cdc_ethernet_descriptor_t *ue; char eaddr_str[USB_MAX_ENCODED_STRING_LEN]; sc->cdce_dev = self; aprint_naive("\n"); aprint_normal("\n"); devinfop = usbd_devinfo_alloc(dev, 0); aprint_normal_dev(self, "%s\n", devinfop); usbd_devinfo_free(devinfop); mutex_init(&sc->cdce_lock, MUTEX_DEFAULT, IPL_NONE); mutex_init(&sc->cdce_txlock, MUTEX_DEFAULT, IPL_SOFTUSB); mutex_init(&sc->cdce_rxlock, MUTEX_DEFAULT, IPL_SOFTUSB); sc->cdce_udev = uiaa->uiaa_device; sc->cdce_ctl_iface = uiaa->uiaa_iface; t = cdce_lookup(uiaa->uiaa_vendor, uiaa->uiaa_product); if (t) sc->cdce_flags = t->cdce_flags; if (sc->cdce_flags & CDCE_NO_UNION) sc->cdce_data_iface = sc->cdce_ctl_iface; else { ud = (const usb_cdc_union_descriptor_t *)usb_find_desc(sc->cdce_udev, UDESC_CS_INTERFACE, UDESCSUB_CDC_UNION); if (ud == NULL) { aprint_error_dev(self, "no union descriptor\n"); return; } data_ifcno = ud->bSlaveInterface[0]; for (i = 0; i < uiaa->uiaa_nifaces; i++) { if (uiaa->uiaa_ifaces[i] != NULL) { id = usbd_get_interface_descriptor( uiaa->uiaa_ifaces[i]); if (id != NULL && id->bInterfaceNumber == data_ifcno) { sc->cdce_data_iface = uiaa->uiaa_ifaces[i]; uiaa->uiaa_ifaces[i] = NULL; } } } } if (sc->cdce_data_iface == NULL) { aprint_error_dev(self, "no data interface\n"); return; } /* * * The Data Class interface of a networking device shall have a minimum * of two interface settings. The first setting (the default interface * setting) includes no endpoints and therefore no networking traffic is * exchanged whenever the default interface setting is selected. One or * more additional interface settings are used for normal operation, and * therefore each includes a pair of endpoints (one IN, and one OUT) to * exchange network traffic. Select an alternate interface setting to * initialize the network aspects of the device and to enable the * exchange of network traffic. * * * Some devices, most notably cable modems, include interface settings * that have no IN or OUT endpoint, therefore loop through the list of all * available interface settings looking for one with both IN and OUT * endpoints. */ id = usbd_get_interface_descriptor(sc->cdce_data_iface); cd = usbd_get_config_descriptor(sc->cdce_udev); numalts = usbd_get_no_alts(cd, id->bInterfaceNumber); for (j = 0; j < numalts; j++) { if (usbd_set_interface(sc->cdce_data_iface, j)) { aprint_error_dev(sc->cdce_dev, "setting alternate interface failed\n"); return; } /* Find endpoints. */ id = usbd_get_interface_descriptor(sc->cdce_data_iface); sc->cdce_bulkin_no = sc->cdce_bulkout_no = -1; for (i = 0; i < id->bNumEndpoints; i++) { ed = usbd_interface2endpoint_descriptor(sc->cdce_data_iface, i); if (!ed) { aprint_error_dev(self, "could not read endpoint descriptor\n"); return; } if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { sc->cdce_bulkin_no = ed->bEndpointAddress; } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { sc->cdce_bulkout_no = ed->bEndpointAddress; } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) { /* XXX: CDC spec defines an interrupt pipe, but it is not * needed for simple host-to-host applications. */ } else { aprint_error_dev(self, "unexpected endpoint\n"); } } /* If we found something, try and use it... */ if ((sc->cdce_bulkin_no != -1) && (sc->cdce_bulkout_no != -1)) break; } if (sc->cdce_bulkin_no == -1) { aprint_error_dev(self, "could not find data bulk in\n"); return; } if (sc->cdce_bulkout_no == -1 ) { aprint_error_dev(self, "could not find data bulk out\n"); return; } ue = (const usb_cdc_ethernet_descriptor_t *)usb_find_desc(dev, UDESC_CS_INTERFACE, UDESCSUB_CDC_ENF); if (!ue || usbd_get_string(dev, ue->iMacAddress, eaddr_str) || ether_aton_r(eaddr, sizeof(eaddr), eaddr_str)) { aprint_normal_dev(self, "faking address\n"); eaddr[0]= 0x2a; memcpy(&eaddr[1], &hardclock_ticks, sizeof(uint32_t)); eaddr[5] = (uint8_t)(device_unit(sc->cdce_dev)); } aprint_normal_dev(self, "address %s\n", ether_sprintf(eaddr)); ifp = GET_IFP(sc); ifp->if_softc = sc; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; ifp->if_init = cdce_init; ifp->if_ioctl = cdce_ioctl; ifp->if_start = cdce_start; ifp->if_watchdog = cdce_watchdog; strncpy(ifp->if_xname, device_xname(sc->cdce_dev), IFNAMSIZ); IFQ_SET_READY(&ifp->if_snd); if_attach(ifp); ether_ifattach(ifp, eaddr); sc->cdce_attached = 1; usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->cdce_udev, sc->cdce_dev); if (!pmf_device_register(self, NULL, NULL)) aprint_error_dev(self, "couldn't establish power handler\n"); return; } int cdce_detach(device_t self, int flags) { struct cdce_softc *sc = device_private(self); struct ifnet *ifp = GET_IFP(sc); int s; pmf_device_deregister(self); s = splusb(); if (!sc->cdce_attached) { splx(s); return 0; } if (ifp->if_flags & IFF_RUNNING) cdce_stop(ifp, 1); ether_ifdetach(ifp); if_detach(ifp); mutex_destroy(&sc->cdce_rxlock); mutex_destroy(&sc->cdce_txlock); mutex_destroy(&sc->cdce_lock); sc->cdce_attached = 0; splx(s); return 0; } Static void cdce_start(struct ifnet *ifp) { struct cdce_softc *sc = ifp->if_softc; mutex_enter(&sc->cdce_txlock); cdce_start_locked(ifp); mutex_exit(&sc->cdce_txlock); } Static void cdce_start_locked(struct ifnet *ifp) { struct cdce_softc *sc = ifp->if_softc; struct mbuf *m_head = NULL; if (sc->cdce_dying || (ifp->if_flags & IFF_OACTIVE)) return; IFQ_POLL(&ifp->if_snd, m_head); if (m_head == NULL) return; if (cdce_encap(sc, m_head, 0)) { return; } IFQ_DEQUEUE(&ifp->if_snd, m_head); bpf_mtap(ifp, m_head); ifp->if_flags |= IFF_OACTIVE; ifp->if_timer = 6; } Static int cdce_encap(struct cdce_softc *sc, struct mbuf *m, int idx) { struct cdce_chain *c = &sc->cdce_cdata.cdce_tx_chain[idx]; int extra = 0; m_copydata(m, 0, m->m_pkthdr.len, c->cdce_buf); if (sc->cdce_flags & CDCE_ZAURUS) { /* Zaurus wants a 32-bit CRC appended to every frame */ uint32_t crc; crc = htole32(~ether_crc32_le(c->cdce_buf, m->m_pkthdr.len)); memcpy(c->cdce_buf + m->m_pkthdr.len, &crc, sizeof(crc)); extra = sizeof(crc); } c->cdce_mbuf = m; usbd_setup_xfer(c->cdce_xfer, c, c->cdce_buf, m->m_pkthdr.len + extra, USBD_FORCE_SHORT_XFER, 10000, cdce_txeof); usbd_status err = usbd_transfer(c->cdce_xfer); if (err != USBD_IN_PROGRESS) { cdce_stop(GET_IFP(sc), 0); return EIO; } sc->cdce_cdata.cdce_tx_cnt++; return 0; } Static void cdce_stop(struct ifnet *ifp, int disable) { struct cdce_softc * const sc = ifp->if_softc; mutex_enter(&sc->cdce_lock); cdce_stop_locked(ifp, disable); mutex_exit(&sc->cdce_lock); } Static void cdce_stop_locked(struct ifnet *ifp, int disable) { struct cdce_softc * const sc = ifp->if_softc; usbd_status err; ifp->if_timer = 0; if (sc->cdce_bulkin_pipe != NULL) { err = usbd_abort_pipe(sc->cdce_bulkin_pipe); if (err) printf("%s: abort rx pipe failed: %s\n", device_xname(sc->cdce_dev), usbd_errstr(err)); } if (sc->cdce_bulkout_pipe != NULL) { err = usbd_abort_pipe(sc->cdce_bulkout_pipe); if (err) printf("%s: abort tx pipe failed: %s\n", device_xname(sc->cdce_dev), usbd_errstr(err)); } cdce_rx_list_free(sc); cdce_tx_list_free(sc); if (sc->cdce_bulkin_pipe != NULL) { err = usbd_close_pipe(sc->cdce_bulkin_pipe); if (err) printf("%s: close rx pipe failed: %s\n", device_xname(sc->cdce_dev), usbd_errstr(err)); sc->cdce_bulkin_pipe = NULL; } if (sc->cdce_bulkout_pipe != NULL) { err = usbd_close_pipe(sc->cdce_bulkout_pipe); if (err) printf("%s: close tx pipe failed: %s\n", device_xname(sc->cdce_dev), usbd_errstr(err)); sc->cdce_bulkout_pipe = NULL; } ifp->if_timer = 0; ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); } Static int cdce_ioctl(struct ifnet *ifp, u_long command, void *data) { struct cdce_softc *sc = ifp->if_softc; int s, error = 0; if (sc->cdce_dying) return EIO; s = splnet(); error = ether_ioctl(ifp, command, data); splx(s); if (error == ENETRESET) error = 0; return error; } Static void cdce_watchdog(struct ifnet *ifp) { struct cdce_softc *sc = ifp->if_softc; if (sc->cdce_dying) return; ifp->if_oerrors++; printf("%s: watchdog timeout\n", device_xname(sc->cdce_dev)); } Static int cdce_init(struct ifnet *ifp) { struct cdce_softc * const sc = ifp->if_softc; mutex_enter(&sc->cdce_lock); int ret = cdce_init_locked(ifp); mutex_exit(&sc->cdce_lock); return ret; } Static int cdce_init_locked(struct ifnet *ifp) { struct cdce_softc * const sc = ifp->if_softc; struct cdce_chain *c; usbd_status err; int i; err = usbd_open_pipe(sc->cdce_data_iface, sc->cdce_bulkin_no, USBD_EXCLUSIVE_USE, &sc->cdce_bulkin_pipe); if (err) { printf("%s: open rx pipe failed: %s\n", device_xname(sc->cdce_dev), usbd_errstr(err)); goto fail; } err = usbd_open_pipe(sc->cdce_data_iface, sc->cdce_bulkout_no, USBD_EXCLUSIVE_USE, &sc->cdce_bulkout_pipe); if (err) { printf("%s: open tx pipe failed: %s\n", device_xname(sc->cdce_dev), usbd_errstr(err)); goto fail1; } if (cdce_tx_list_init(sc)) { printf("%s: tx list init failed\n", device_xname(sc->cdce_dev)); goto fail2; } if (cdce_rx_list_init(sc)) { printf("%s: rx list init failed\n", device_xname(sc->cdce_dev)); goto fail3; } for (i = 0; i < CDCE_RX_LIST_CNT; i++) { c = &sc->cdce_cdata.cdce_rx_chain[i]; usbd_setup_xfer(c->cdce_xfer, c, c->cdce_buf, CDCE_BUFSZ, USBD_SHORT_XFER_OK, USBD_NO_TIMEOUT, cdce_rxeof); usbd_transfer(c->cdce_xfer); } ifp->if_flags |= IFF_RUNNING; ifp->if_flags &= ~IFF_OACTIVE; return 0; fail3: cdce_tx_list_free(sc); fail2: usbd_close_pipe(sc->cdce_bulkout_pipe); fail1: usbd_close_pipe(sc->cdce_bulkin_pipe); fail: return EIO; } Static int cdce_newbuf(struct cdce_softc *sc, struct cdce_chain *c, struct mbuf *m) { struct mbuf *m_new = NULL; if (m == NULL) { MGETHDR(m_new, M_DONTWAIT, MT_DATA); if (m_new == NULL) { printf("%s: no memory for rx list " "-- packet dropped!\n", device_xname(sc->cdce_dev)); return ENOBUFS; } MCLGET(m_new, M_DONTWAIT); if (!(m_new->m_flags & M_EXT)) { printf("%s: no memory for rx list " "-- packet dropped!\n", device_xname(sc->cdce_dev)); m_freem(m_new); return ENOBUFS; } m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; } else { m_new = m; m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; m_new->m_data = m_new->m_ext.ext_buf; } c->cdce_mbuf = m_new; return 0; } Static int cdce_rx_list_init(struct cdce_softc *sc) { struct cdce_cdata *cd = &sc->cdce_cdata; struct cdce_chain *c; int i; for (i = 0; i < CDCE_RX_LIST_CNT; i++) { c = &cd->cdce_rx_chain[i]; c->cdce_sc = sc; c->cdce_idx = i; if (cdce_newbuf(sc, c, NULL) == ENOBUFS) return ENOBUFS; if (c->cdce_xfer == NULL) { int err = usbd_create_xfer(sc->cdce_bulkin_pipe, CDCE_BUFSZ, USBD_SHORT_XFER_OK, 0, &c->cdce_xfer); if (err) return err; c->cdce_buf = usbd_get_buffer(c->cdce_xfer); } } return 0; } Static void cdce_rx_list_free(struct cdce_softc *sc) { /* Free RX resources */ for (size_t i = 0; i < CDCE_RX_LIST_CNT; i++) { if (sc->cdce_cdata.cdce_rx_chain[i].cdce_mbuf != NULL) { m_freem(sc->cdce_cdata.cdce_rx_chain[i].cdce_mbuf); sc->cdce_cdata.cdce_rx_chain[i].cdce_mbuf = NULL; } if (sc->cdce_cdata.cdce_rx_chain[i].cdce_xfer != NULL) { usbd_destroy_xfer(sc->cdce_cdata.cdce_rx_chain[i].cdce_xfer); sc->cdce_cdata.cdce_rx_chain[i].cdce_xfer = NULL; } } } Static int cdce_tx_list_init(struct cdce_softc *sc) { struct cdce_cdata *cd = &sc->cdce_cdata; struct cdce_chain *c; int i; for (i = 0; i < CDCE_TX_LIST_CNT; i++) { c = &cd->cdce_tx_chain[i]; c->cdce_sc = sc; c->cdce_idx = i; c->cdce_mbuf = NULL; if (c->cdce_xfer == NULL) { int err = usbd_create_xfer(sc->cdce_bulkout_pipe, CDCE_BUFSZ, USBD_FORCE_SHORT_XFER, 0, &c->cdce_xfer); if (err) return err; c->cdce_buf = usbd_get_buffer(c->cdce_xfer); } } return 0; } Static void cdce_tx_list_free(struct cdce_softc *sc) { /* Free TX resources */ for (size_t i = 0; i < CDCE_TX_LIST_CNT; i++) { if (sc->cdce_cdata.cdce_tx_chain[i].cdce_mbuf != NULL) { m_freem(sc->cdce_cdata.cdce_tx_chain[i].cdce_mbuf); sc->cdce_cdata.cdce_tx_chain[i].cdce_mbuf = NULL; } if (sc->cdce_cdata.cdce_tx_chain[i].cdce_xfer != NULL) { usbd_destroy_xfer(sc->cdce_cdata.cdce_tx_chain[i].cdce_xfer); sc->cdce_cdata.cdce_tx_chain[i].cdce_xfer = NULL; } } } Static void cdce_rxeof(struct usbd_xfer *xfer, void *priv, usbd_status status) { struct cdce_chain *c = priv; struct cdce_softc *sc = c->cdce_sc; struct ifnet *ifp = GET_IFP(sc); struct mbuf *m; int total_len = 0; int s; if (sc->cdce_dying || !(ifp->if_flags & IFF_RUNNING)) return; if (status != USBD_NORMAL_COMPLETION) { if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) return; if (sc->cdce_rxeof_errors == 0) printf("%s: usb error on rx: %s\n", device_xname(sc->cdce_dev), usbd_errstr(status)); if (status == USBD_STALLED) usbd_clear_endpoint_stall_async(sc->cdce_bulkin_pipe); DELAY(sc->cdce_rxeof_errors * 10000); sc->cdce_rxeof_errors++; goto done; } sc->cdce_rxeof_errors = 0; usbd_get_xfer_status(xfer, NULL, NULL, &total_len, NULL); if (sc->cdce_flags & CDCE_ZAURUS) total_len -= 4; /* Strip off CRC added by Zaurus */ if (total_len <= 1) goto done; m = c->cdce_mbuf; memcpy(mtod(m, char *), c->cdce_buf, total_len); if (total_len < sizeof(struct ether_header)) { ifp->if_ierrors++; goto done; } ifp->if_ipackets++; m->m_pkthdr.len = m->m_len = total_len; m->m_pkthdr.rcvif = ifp; s = splnet(); if (cdce_newbuf(sc, c, NULL) == ENOBUFS) { ifp->if_ierrors++; goto done1; } bpf_mtap(ifp, m); (*(ifp)->if_input)((ifp), (m)); done1: splx(s); done: /* Setup new transfer. */ usbd_setup_xfer(c->cdce_xfer, c, c->cdce_buf, CDCE_BUFSZ, USBD_SHORT_XFER_OK, USBD_NO_TIMEOUT, cdce_rxeof); usbd_transfer(c->cdce_xfer); } Static void cdce_txeof(struct usbd_xfer *xfer, void *priv, usbd_status status) { struct cdce_chain *c = priv; struct cdce_softc *sc = c->cdce_sc; struct ifnet *ifp = GET_IFP(sc); usbd_status err; if (sc->cdce_dying) return; int s = splnet(); ifp->if_timer = 0; ifp->if_flags &= ~IFF_OACTIVE; if (status != USBD_NORMAL_COMPLETION) { if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) { splx(s); return; } ifp->if_oerrors++; printf("%s: usb error on tx: %s\n", device_xname(sc->cdce_dev), usbd_errstr(status)); if (status == USBD_STALLED) usbd_clear_endpoint_stall_async(sc->cdce_bulkout_pipe); splx(s); return; } usbd_get_xfer_status(c->cdce_xfer, NULL, NULL, NULL, &err); if (c->cdce_mbuf != NULL) { m_freem(c->cdce_mbuf); c->cdce_mbuf = NULL; } if (err) ifp->if_oerrors++; else ifp->if_opackets++; if (IFQ_IS_EMPTY(&ifp->if_snd) == 0) cdce_start(ifp); splx(s); } int cdce_activate(device_t self, enum devact act) { struct cdce_softc *sc = device_private(self); switch (act) { case DVACT_DEACTIVATE: if_deactivate(GET_IFP(sc)); sc->cdce_dying = 1; return 0; default: return EOPNOTSUPP; } }