/*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1996-2000 Whistle Communications, Inc. * 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. Neither the name of author nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY NICK HIBMA 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 THE AUTHOR OR 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. * */ #include /* Driver for arbitrary double bulk pipe devices. * The driver assumes that there will be the same driver on the other side. * * XXX Some more information on what the framing of the IP packets looks like. * * To take full advantage of bulk transmission, packets should be chosen * between 1k and 5k in size (1k to make sure the sending side starts * streaming, and <5k to avoid overflowing the system with small TDs). */ /* probe/attach/detach: * Connect the driver to the hardware and netgraph * * The reason we submit a bulk in transfer is that USB does not know about * interrupts. The bulk transfer continuously polls the device for data. * While the device has no data available, the device NAKs the TDs. As soon * as there is data, the transfer happens and the data comes flowing in. * * In case you were wondering, interrupt transfers happen exactly that way. * It therefore doesn't make sense to use the interrupt pipe to signal * 'data ready' and then schedule a bulk transfer to fetch it. That would * incur a 2ms delay at least, without reducing bandwidth requirements. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "usbdevs.h" #define USB_DEBUG_VAR udbp_debug #include #include #include #include #include #include #include #ifdef USB_DEBUG static int udbp_debug = 0; static SYSCTL_NODE(_hw_usb, OID_AUTO, udbp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, "USB udbp"); SYSCTL_INT(_hw_usb_udbp, OID_AUTO, debug, CTLFLAG_RWTUN, &udbp_debug, 0, "udbp debug level"); #endif #define UDBP_TIMEOUT 2000 /* timeout on outbound transfers, in * msecs */ #define UDBP_BUFFERSIZE MCLBYTES /* maximum number of bytes in one * transfer */ #define UDBP_T_WR 0 #define UDBP_T_RD 1 #define UDBP_T_WR_CS 2 #define UDBP_T_RD_CS 3 #define UDBP_T_MAX 4 #define UDBP_Q_MAXLEN 50 struct udbp_softc { struct mtx sc_mtx; struct ng_bt_mbufq sc_xmitq_hipri; /* hi-priority transmit queue */ struct ng_bt_mbufq sc_xmitq; /* low-priority transmit queue */ struct usb_xfer *sc_xfer[UDBP_T_MAX]; node_p sc_node; /* back pointer to node */ hook_p sc_hook; /* pointer to the hook */ struct mbuf *sc_bulk_in_buffer; uint32_t sc_packets_in; /* packets in from downstream */ uint32_t sc_packets_out; /* packets out towards downstream */ uint8_t sc_flags; #define UDBP_FLAG_READ_STALL 0x01 /* read transfer stalled */ #define UDBP_FLAG_WRITE_STALL 0x02 /* write transfer stalled */ uint8_t sc_name[16]; }; /* prototypes */ static int udbp_modload(module_t mod, int event, void *data); static device_probe_t udbp_probe; static device_attach_t udbp_attach; static device_detach_t udbp_detach; static usb_callback_t udbp_bulk_read_callback; static usb_callback_t udbp_bulk_read_clear_stall_callback; static usb_callback_t udbp_bulk_write_callback; static usb_callback_t udbp_bulk_write_clear_stall_callback; static void udbp_bulk_read_complete(node_p, hook_p, void *, int); static ng_constructor_t ng_udbp_constructor; static ng_rcvmsg_t ng_udbp_rcvmsg; static ng_shutdown_t ng_udbp_rmnode; static ng_newhook_t ng_udbp_newhook; static ng_connect_t ng_udbp_connect; static ng_rcvdata_t ng_udbp_rcvdata; static ng_disconnect_t ng_udbp_disconnect; /* Parse type for struct ngudbpstat */ static const struct ng_parse_struct_field ng_udbp_stat_type_fields[] = NG_UDBP_STATS_TYPE_INFO; static const struct ng_parse_type ng_udbp_stat_type = { &ng_parse_struct_type, &ng_udbp_stat_type_fields }; /* List of commands and how to convert arguments to/from ASCII */ static const struct ng_cmdlist ng_udbp_cmdlist[] = { { NGM_UDBP_COOKIE, NGM_UDBP_GET_STATUS, "getstatus", NULL, &ng_udbp_stat_type, }, { NGM_UDBP_COOKIE, NGM_UDBP_SET_FLAG, "setflag", &ng_parse_int32_type, NULL }, {0} }; /* Netgraph node type descriptor */ static struct ng_type ng_udbp_typestruct = { .version = NG_ABI_VERSION, .name = NG_UDBP_NODE_TYPE, .constructor = ng_udbp_constructor, .rcvmsg = ng_udbp_rcvmsg, .shutdown = ng_udbp_rmnode, .newhook = ng_udbp_newhook, .connect = ng_udbp_connect, .rcvdata = ng_udbp_rcvdata, .disconnect = ng_udbp_disconnect, .cmdlist = ng_udbp_cmdlist, }; /* USB config */ static const struct usb_config udbp_config[UDBP_T_MAX] = { [UDBP_T_WR] = { .type = UE_BULK, .endpoint = UE_ADDR_ANY, .direction = UE_DIR_OUT, .bufsize = UDBP_BUFFERSIZE, .flags = {.pipe_bof = 1,.force_short_xfer = 1,}, .callback = &udbp_bulk_write_callback, .timeout = UDBP_TIMEOUT, }, [UDBP_T_RD] = { .type = UE_BULK, .endpoint = UE_ADDR_ANY, .direction = UE_DIR_IN, .bufsize = UDBP_BUFFERSIZE, .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, .callback = &udbp_bulk_read_callback, }, [UDBP_T_WR_CS] = { .type = UE_CONTROL, .endpoint = 0x00, /* Control pipe */ .direction = UE_DIR_ANY, .bufsize = sizeof(struct usb_device_request), .callback = &udbp_bulk_write_clear_stall_callback, .timeout = 1000, /* 1 second */ .interval = 50, /* 50ms */ }, [UDBP_T_RD_CS] = { .type = UE_CONTROL, .endpoint = 0x00, /* Control pipe */ .direction = UE_DIR_ANY, .bufsize = sizeof(struct usb_device_request), .callback = &udbp_bulk_read_clear_stall_callback, .timeout = 1000, /* 1 second */ .interval = 50, /* 50ms */ }, }; static devclass_t udbp_devclass; static device_method_t udbp_methods[] = { /* Device interface */ DEVMETHOD(device_probe, udbp_probe), DEVMETHOD(device_attach, udbp_attach), DEVMETHOD(device_detach, udbp_detach), DEVMETHOD_END }; static driver_t udbp_driver = { .name = "udbp", .methods = udbp_methods, .size = sizeof(struct udbp_softc), }; static const STRUCT_USB_HOST_ID udbp_devs[] = { {USB_VPI(USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U258, 0)}, {USB_VPI(USB_VENDOR_NETCHIP, USB_PRODUCT_NETCHIP_TURBOCONNECT, 0)}, {USB_VPI(USB_VENDOR_NETCHIP, USB_PRODUCT_NETCHIP_GADGETZERO, 0)}, {USB_VPI(USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2301, 0)}, {USB_VPI(USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2302, 0)}, {USB_VPI(USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL27A1, 0)}, {USB_VPI(USB_VENDOR_ANCHOR, USB_PRODUCT_ANCHOR_EZLINK, 0)}, {USB_VPI(USB_VENDOR_GENESYS, USB_PRODUCT_GENESYS_GL620USB, 0)}, }; DRIVER_MODULE(udbp, uhub, udbp_driver, udbp_devclass, udbp_modload, 0); MODULE_DEPEND(udbp, netgraph, NG_ABI_VERSION, NG_ABI_VERSION, NG_ABI_VERSION); MODULE_DEPEND(udbp, usb, 1, 1, 1); MODULE_VERSION(udbp, 1); USB_PNP_HOST_INFO(udbp_devs); static int udbp_modload(module_t mod, int event, void *data) { int error; switch (event) { case MOD_LOAD: error = ng_newtype(&ng_udbp_typestruct); if (error != 0) { printf("%s: Could not register " "Netgraph node type, error=%d\n", NG_UDBP_NODE_TYPE, error); } break; case MOD_UNLOAD: error = ng_rmtype(&ng_udbp_typestruct); break; default: error = EOPNOTSUPP; break; } return (error); } static int udbp_probe(device_t dev) { struct usb_attach_arg *uaa = device_get_ivars(dev); if (uaa->usb_mode != USB_MODE_HOST) return (ENXIO); if (uaa->info.bConfigIndex != 0) return (ENXIO); if (uaa->info.bIfaceIndex != 0) return (ENXIO); return (usbd_lookup_id_by_uaa(udbp_devs, sizeof(udbp_devs), uaa)); } static int udbp_attach(device_t dev) { struct usb_attach_arg *uaa = device_get_ivars(dev); struct udbp_softc *sc = device_get_softc(dev); int error; device_set_usb_desc(dev); snprintf(sc->sc_name, sizeof(sc->sc_name), "%s", device_get_nameunit(dev)); mtx_init(&sc->sc_mtx, "udbp lock", NULL, MTX_DEF | MTX_RECURSE); error = usbd_transfer_setup(uaa->device, &uaa->info.bIfaceIndex, sc->sc_xfer, udbp_config, UDBP_T_MAX, sc, &sc->sc_mtx); if (error) { DPRINTF("error=%s\n", usbd_errstr(error)); goto detach; } NG_BT_MBUFQ_INIT(&sc->sc_xmitq, UDBP_Q_MAXLEN); NG_BT_MBUFQ_INIT(&sc->sc_xmitq_hipri, UDBP_Q_MAXLEN); /* create Netgraph node */ if (ng_make_node_common(&ng_udbp_typestruct, &sc->sc_node) != 0) { printf("%s: Could not create Netgraph node\n", sc->sc_name); sc->sc_node = NULL; goto detach; } /* name node */ if (ng_name_node(sc->sc_node, sc->sc_name) != 0) { printf("%s: Could not name node\n", sc->sc_name); NG_NODE_UNREF(sc->sc_node); sc->sc_node = NULL; goto detach; } NG_NODE_SET_PRIVATE(sc->sc_node, sc); /* the device is now operational */ return (0); /* success */ detach: udbp_detach(dev); return (ENOMEM); /* failure */ } static int udbp_detach(device_t dev) { struct udbp_softc *sc = device_get_softc(dev); /* destroy Netgraph node */ if (sc->sc_node != NULL) { NG_NODE_SET_PRIVATE(sc->sc_node, NULL); ng_rmnode_self(sc->sc_node); sc->sc_node = NULL; } /* free USB transfers, if any */ usbd_transfer_unsetup(sc->sc_xfer, UDBP_T_MAX); mtx_destroy(&sc->sc_mtx); /* destroy queues */ NG_BT_MBUFQ_DESTROY(&sc->sc_xmitq); NG_BT_MBUFQ_DESTROY(&sc->sc_xmitq_hipri); /* extra check */ if (sc->sc_bulk_in_buffer) { m_freem(sc->sc_bulk_in_buffer); sc->sc_bulk_in_buffer = NULL; } return (0); /* success */ } static void udbp_bulk_read_callback(struct usb_xfer *xfer, usb_error_t error) { struct udbp_softc *sc = usbd_xfer_softc(xfer); struct usb_page_cache *pc; struct mbuf *m; int actlen; usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); switch (USB_GET_STATE(xfer)) { case USB_ST_TRANSFERRED: /* allocate new mbuf */ MGETHDR(m, M_NOWAIT, MT_DATA); if (m == NULL) { goto tr_setup; } if (!(MCLGET(m, M_NOWAIT))) { m_freem(m); goto tr_setup; } m->m_pkthdr.len = m->m_len = actlen; pc = usbd_xfer_get_frame(xfer, 0); usbd_copy_out(pc, 0, m->m_data, actlen); sc->sc_bulk_in_buffer = m; DPRINTF("received package %d bytes\n", actlen); case USB_ST_SETUP: tr_setup: if (sc->sc_bulk_in_buffer) { ng_send_fn(sc->sc_node, NULL, &udbp_bulk_read_complete, NULL, 0); return; } if (sc->sc_flags & UDBP_FLAG_READ_STALL) { usbd_transfer_start(sc->sc_xfer[UDBP_T_RD_CS]); return; } usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); usbd_transfer_submit(xfer); return; default: /* Error */ if (error != USB_ERR_CANCELLED) { /* try to clear stall first */ sc->sc_flags |= UDBP_FLAG_READ_STALL; usbd_transfer_start(sc->sc_xfer[UDBP_T_RD_CS]); } return; } } static void udbp_bulk_read_clear_stall_callback(struct usb_xfer *xfer, usb_error_t error) { struct udbp_softc *sc = usbd_xfer_softc(xfer); struct usb_xfer *xfer_other = sc->sc_xfer[UDBP_T_RD]; if (usbd_clear_stall_callback(xfer, xfer_other)) { DPRINTF("stall cleared\n"); sc->sc_flags &= ~UDBP_FLAG_READ_STALL; usbd_transfer_start(xfer_other); } } static void udbp_bulk_read_complete(node_p node, hook_p hook, void *arg1, int arg2) { struct udbp_softc *sc = NG_NODE_PRIVATE(node); struct mbuf *m; int error; if (sc == NULL) { return; } mtx_lock(&sc->sc_mtx); m = sc->sc_bulk_in_buffer; if (m) { sc->sc_bulk_in_buffer = NULL; if ((sc->sc_hook == NULL) || NG_HOOK_NOT_VALID(sc->sc_hook)) { DPRINTF("No upstream hook\n"); goto done; } sc->sc_packets_in++; NG_SEND_DATA_ONLY(error, sc->sc_hook, m); m = NULL; } done: if (m) { m_freem(m); } /* start USB bulk-in transfer, if not already started */ usbd_transfer_start(sc->sc_xfer[UDBP_T_RD]); mtx_unlock(&sc->sc_mtx); } static void udbp_bulk_write_callback(struct usb_xfer *xfer, usb_error_t error) { struct udbp_softc *sc = usbd_xfer_softc(xfer); struct usb_page_cache *pc; struct mbuf *m; switch (USB_GET_STATE(xfer)) { case USB_ST_TRANSFERRED: sc->sc_packets_out++; case USB_ST_SETUP: if (sc->sc_flags & UDBP_FLAG_WRITE_STALL) { usbd_transfer_start(sc->sc_xfer[UDBP_T_WR_CS]); return; } /* get next mbuf, if any */ NG_BT_MBUFQ_DEQUEUE(&sc->sc_xmitq_hipri, m); if (m == NULL) { NG_BT_MBUFQ_DEQUEUE(&sc->sc_xmitq, m); if (m == NULL) { DPRINTF("Data queue is empty\n"); return; } } if (m->m_pkthdr.len > MCLBYTES) { DPRINTF("truncating large packet " "from %d to %d bytes\n", m->m_pkthdr.len, MCLBYTES); m->m_pkthdr.len = MCLBYTES; } pc = usbd_xfer_get_frame(xfer, 0); usbd_m_copy_in(pc, 0, m, 0, m->m_pkthdr.len); usbd_xfer_set_frame_len(xfer, 0, m->m_pkthdr.len); DPRINTF("packet out: %d bytes\n", m->m_pkthdr.len); m_freem(m); usbd_transfer_submit(xfer); return; default: /* Error */ if (error != USB_ERR_CANCELLED) { /* try to clear stall first */ sc->sc_flags |= UDBP_FLAG_WRITE_STALL; usbd_transfer_start(sc->sc_xfer[UDBP_T_WR_CS]); } return; } } static void udbp_bulk_write_clear_stall_callback(struct usb_xfer *xfer, usb_error_t error) { struct udbp_softc *sc = usbd_xfer_softc(xfer); struct usb_xfer *xfer_other = sc->sc_xfer[UDBP_T_WR]; if (usbd_clear_stall_callback(xfer, xfer_other)) { DPRINTF("stall cleared\n"); sc->sc_flags &= ~UDBP_FLAG_WRITE_STALL; usbd_transfer_start(xfer_other); } } /*********************************************************************** * Start of Netgraph methods **********************************************************************/ /* * If this is a device node so this work is done in the attach() * routine and the constructor will return EINVAL as you should not be able * to create nodes that depend on hardware (unless you can add the hardware :) */ static int ng_udbp_constructor(node_p node) { return (EINVAL); } /* * Give our ok for a hook to be added... * If we are not running this might kick a device into life. * Possibly decode information out of the hook name. * Add the hook's private info to the hook structure. * (if we had some). In this example, we assume that there is a * an array of structs, called 'channel' in the private info, * one for each active channel. The private * pointer of each hook points to the appropriate UDBP_hookinfo struct * so that the source of an input packet is easily identified. */ static int ng_udbp_newhook(node_p node, hook_p hook, const char *name) { struct udbp_softc *sc = NG_NODE_PRIVATE(node); int32_t error = 0; if (strcmp(name, NG_UDBP_HOOK_NAME)) { return (EINVAL); } mtx_lock(&sc->sc_mtx); if (sc->sc_hook != NULL) { error = EISCONN; } else { sc->sc_hook = hook; NG_HOOK_SET_PRIVATE(hook, NULL); } mtx_unlock(&sc->sc_mtx); return (error); } /* * Get a netgraph control message. * Check it is one we understand. If needed, send a response. * We could save the address for an async action later, but don't here. * Always free the message. * The response should be in a malloc'd region that the caller can 'free'. * A response is not required. * Theoretically you could respond defferently to old message types if * the cookie in the header didn't match what we consider to be current * (so that old userland programs could continue to work). */ static int ng_udbp_rcvmsg(node_p node, item_p item, hook_p lasthook) { struct udbp_softc *sc = NG_NODE_PRIVATE(node); struct ng_mesg *resp = NULL; int error = 0; struct ng_mesg *msg; NGI_GET_MSG(item, msg); /* Deal with message according to cookie and command */ switch (msg->header.typecookie) { case NGM_UDBP_COOKIE: switch (msg->header.cmd) { case NGM_UDBP_GET_STATUS: { struct ngudbpstat *stats; NG_MKRESPONSE(resp, msg, sizeof(*stats), M_NOWAIT); if (!resp) { error = ENOMEM; break; } stats = (struct ngudbpstat *)resp->data; mtx_lock(&sc->sc_mtx); stats->packets_in = sc->sc_packets_in; stats->packets_out = sc->sc_packets_out; mtx_unlock(&sc->sc_mtx); break; } case NGM_UDBP_SET_FLAG: if (msg->header.arglen != sizeof(uint32_t)) { error = EINVAL; break; } DPRINTF("flags = 0x%08x\n", *((uint32_t *)msg->data)); break; default: error = EINVAL; /* unknown command */ break; } break; default: error = EINVAL; /* unknown cookie type */ break; } /* Take care of synchronous response, if any */ NG_RESPOND_MSG(error, node, item, resp); NG_FREE_MSG(msg); return (error); } /* * Accept data from the hook and queue it for output. */ static int ng_udbp_rcvdata(hook_p hook, item_p item) { struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); struct ng_bt_mbufq *queue_ptr; struct mbuf *m; struct ng_tag_prio *ptag; int error; if (sc == NULL) { NG_FREE_ITEM(item); return (EHOSTDOWN); } NGI_GET_M(item, m); NG_FREE_ITEM(item); /* * Now queue the data for when it can be sent */ ptag = (void *)m_tag_locate(m, NGM_GENERIC_COOKIE, NG_TAG_PRIO, NULL); if (ptag && (ptag->priority > NG_PRIO_CUTOFF)) queue_ptr = &sc->sc_xmitq_hipri; else queue_ptr = &sc->sc_xmitq; mtx_lock(&sc->sc_mtx); if (NG_BT_MBUFQ_FULL(queue_ptr)) { NG_BT_MBUFQ_DROP(queue_ptr); NG_FREE_M(m); error = ENOBUFS; } else { NG_BT_MBUFQ_ENQUEUE(queue_ptr, m); /* * start bulk-out transfer, if not already started: */ usbd_transfer_start(sc->sc_xfer[UDBP_T_WR]); error = 0; } mtx_unlock(&sc->sc_mtx); return (error); } /* * Do local shutdown processing.. * We are a persistent device, we refuse to go away, and * only remove our links and reset ourself. */ static int ng_udbp_rmnode(node_p node) { struct udbp_softc *sc = NG_NODE_PRIVATE(node); /* Let old node go */ NG_NODE_SET_PRIVATE(node, NULL); NG_NODE_UNREF(node); /* forget it ever existed */ if (sc == NULL) { goto done; } /* Create Netgraph node */ if (ng_make_node_common(&ng_udbp_typestruct, &sc->sc_node) != 0) { printf("%s: Could not create Netgraph node\n", sc->sc_name); sc->sc_node = NULL; goto done; } /* Name node */ if (ng_name_node(sc->sc_node, sc->sc_name) != 0) { printf("%s: Could not name Netgraph node\n", sc->sc_name); NG_NODE_UNREF(sc->sc_node); sc->sc_node = NULL; goto done; } NG_NODE_SET_PRIVATE(sc->sc_node, sc); done: if (sc) { mtx_unlock(&sc->sc_mtx); } return (0); } /* * This is called once we've already connected a new hook to the other node. * It gives us a chance to balk at the last minute. */ static int ng_udbp_connect(hook_p hook) { struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); /* probably not at splnet, force outward queueing */ NG_HOOK_FORCE_QUEUE(NG_HOOK_PEER(hook)); mtx_lock(&sc->sc_mtx); sc->sc_flags |= (UDBP_FLAG_READ_STALL | UDBP_FLAG_WRITE_STALL); /* start bulk-in transfer */ usbd_transfer_start(sc->sc_xfer[UDBP_T_RD]); /* start bulk-out transfer */ usbd_transfer_start(sc->sc_xfer[UDBP_T_WR]); mtx_unlock(&sc->sc_mtx); return (0); } /* * Dook disconnection * * For this type, removal of the last link destroys the node */ static int ng_udbp_disconnect(hook_p hook) { struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); int error = 0; if (sc != NULL) { mtx_lock(&sc->sc_mtx); if (hook != sc->sc_hook) { error = EINVAL; } else { /* stop bulk-in transfer */ usbd_transfer_stop(sc->sc_xfer[UDBP_T_RD_CS]); usbd_transfer_stop(sc->sc_xfer[UDBP_T_RD]); /* stop bulk-out transfer */ usbd_transfer_stop(sc->sc_xfer[UDBP_T_WR_CS]); usbd_transfer_stop(sc->sc_xfer[UDBP_T_WR]); /* cleanup queues */ NG_BT_MBUFQ_DRAIN(&sc->sc_xmitq); NG_BT_MBUFQ_DRAIN(&sc->sc_xmitq_hipri); if (sc->sc_bulk_in_buffer) { m_freem(sc->sc_bulk_in_buffer); sc->sc_bulk_in_buffer = NULL; } sc->sc_hook = NULL; } mtx_unlock(&sc->sc_mtx); } if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0) && (NG_NODE_IS_VALID(NG_HOOK_NODE(hook)))) ng_rmnode_self(NG_HOOK_NODE(hook)); return (error); }