2 * Copyright (c) 1996-2000 Whistle Communications, Inc.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of author nor the names of its
14 * contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY NICK HIBMA AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 /* Driver for arbitrary double bulk pipe devices.
35 * The driver assumes that there will be the same driver on the other side.
37 * XXX Some more information on what the framing of the IP packets looks like.
39 * To take full advantage of bulk transmission, packets should be chosen
40 * between 1k and 5k in size (1k to make sure the sending side starts
41 * streaming, and <5k to avoid overflowing the system with small TDs).
45 /* probe/attach/detach:
46 * Connect the driver to the hardware and netgraph
48 * The reason we submit a bulk in transfer is that USB does not know about
49 * interrupts. The bulk transfer continuously polls the device for data.
50 * While the device has no data available, the device NAKs the TDs. As soon
51 * as there is data, the transfer happens and the data comes flowing in.
53 * In case you were wondering, interrupt transfers happen exactly that way.
54 * It therefore doesn't make sense to use the interrupt pipe to signal
55 * 'data ready' and then schedule a bulk transfer to fetch it. That would
56 * incur a 2ms delay at least, without reducing bandwidth requirements.
60 #include <sys/stdint.h>
61 #include <sys/stddef.h>
62 #include <sys/param.h>
63 #include <sys/queue.h>
64 #include <sys/types.h>
65 #include <sys/systm.h>
66 #include <sys/kernel.h>
68 #include <sys/module.h>
70 #include <sys/mutex.h>
71 #include <sys/condvar.h>
72 #include <sys/sysctl.h>
74 #include <sys/unistd.h>
75 #include <sys/callout.h>
76 #include <sys/malloc.h>
79 #include <dev/usb/usb.h>
80 #include <dev/usb/usbdi.h>
81 #include <dev/usb/usbdi_util.h>
84 #define USB_DEBUG_VAR udbp_debug
85 #include <dev/usb/usb_debug.h>
89 #include <netgraph/ng_message.h>
90 #include <netgraph/netgraph.h>
91 #include <netgraph/ng_parse.h>
92 #include <netgraph/bluetooth/include/ng_bluetooth.h>
94 #include <dev/usb/misc/udbp.h>
97 static int udbp_debug = 0;
99 static SYSCTL_NODE(_hw_usb, OID_AUTO, udbp, CTLFLAG_RW, 0, "USB udbp");
100 SYSCTL_INT(_hw_usb_udbp, OID_AUTO, debug, CTLFLAG_RWTUN,
101 &udbp_debug, 0, "udbp debug level");
104 #define UDBP_TIMEOUT 2000 /* timeout on outbound transfers, in
106 #define UDBP_BUFFERSIZE MCLBYTES /* maximum number of bytes in one
110 #define UDBP_T_WR_CS 2
111 #define UDBP_T_RD_CS 3
113 #define UDBP_Q_MAXLEN 50
118 struct ng_bt_mbufq sc_xmitq_hipri; /* hi-priority transmit queue */
119 struct ng_bt_mbufq sc_xmitq; /* low-priority transmit queue */
121 struct usb_xfer *sc_xfer[UDBP_T_MAX];
122 node_p sc_node; /* back pointer to node */
123 hook_p sc_hook; /* pointer to the hook */
124 struct mbuf *sc_bulk_in_buffer;
126 uint32_t sc_packets_in; /* packets in from downstream */
127 uint32_t sc_packets_out; /* packets out towards downstream */
130 #define UDBP_FLAG_READ_STALL 0x01 /* read transfer stalled */
131 #define UDBP_FLAG_WRITE_STALL 0x02 /* write transfer stalled */
138 static int udbp_modload(module_t mod, int event, void *data);
140 static device_probe_t udbp_probe;
141 static device_attach_t udbp_attach;
142 static device_detach_t udbp_detach;
144 static usb_callback_t udbp_bulk_read_callback;
145 static usb_callback_t udbp_bulk_read_clear_stall_callback;
146 static usb_callback_t udbp_bulk_write_callback;
147 static usb_callback_t udbp_bulk_write_clear_stall_callback;
149 static void udbp_bulk_read_complete(node_p, hook_p, void *, int);
151 static ng_constructor_t ng_udbp_constructor;
152 static ng_rcvmsg_t ng_udbp_rcvmsg;
153 static ng_shutdown_t ng_udbp_rmnode;
154 static ng_newhook_t ng_udbp_newhook;
155 static ng_connect_t ng_udbp_connect;
156 static ng_rcvdata_t ng_udbp_rcvdata;
157 static ng_disconnect_t ng_udbp_disconnect;
159 /* Parse type for struct ngudbpstat */
160 static const struct ng_parse_struct_field
161 ng_udbp_stat_type_fields[] = NG_UDBP_STATS_TYPE_INFO;
163 static const struct ng_parse_type ng_udbp_stat_type = {
164 &ng_parse_struct_type,
165 &ng_udbp_stat_type_fields
168 /* List of commands and how to convert arguments to/from ASCII */
169 static const struct ng_cmdlist ng_udbp_cmdlist[] = {
181 &ng_parse_int32_type,
187 /* Netgraph node type descriptor */
188 static struct ng_type ng_udbp_typestruct = {
189 .version = NG_ABI_VERSION,
190 .name = NG_UDBP_NODE_TYPE,
191 .constructor = ng_udbp_constructor,
192 .rcvmsg = ng_udbp_rcvmsg,
193 .shutdown = ng_udbp_rmnode,
194 .newhook = ng_udbp_newhook,
195 .connect = ng_udbp_connect,
196 .rcvdata = ng_udbp_rcvdata,
197 .disconnect = ng_udbp_disconnect,
198 .cmdlist = ng_udbp_cmdlist,
202 static const struct usb_config udbp_config[UDBP_T_MAX] = {
206 .endpoint = UE_ADDR_ANY,
207 .direction = UE_DIR_OUT,
208 .bufsize = UDBP_BUFFERSIZE,
209 .flags = {.pipe_bof = 1,.force_short_xfer = 1,},
210 .callback = &udbp_bulk_write_callback,
211 .timeout = UDBP_TIMEOUT,
216 .endpoint = UE_ADDR_ANY,
217 .direction = UE_DIR_IN,
218 .bufsize = UDBP_BUFFERSIZE,
219 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
220 .callback = &udbp_bulk_read_callback,
225 .endpoint = 0x00, /* Control pipe */
226 .direction = UE_DIR_ANY,
227 .bufsize = sizeof(struct usb_device_request),
228 .callback = &udbp_bulk_write_clear_stall_callback,
229 .timeout = 1000, /* 1 second */
230 .interval = 50, /* 50ms */
235 .endpoint = 0x00, /* Control pipe */
236 .direction = UE_DIR_ANY,
237 .bufsize = sizeof(struct usb_device_request),
238 .callback = &udbp_bulk_read_clear_stall_callback,
239 .timeout = 1000, /* 1 second */
240 .interval = 50, /* 50ms */
244 static devclass_t udbp_devclass;
246 static device_method_t udbp_methods[] = {
247 /* Device interface */
248 DEVMETHOD(device_probe, udbp_probe),
249 DEVMETHOD(device_attach, udbp_attach),
250 DEVMETHOD(device_detach, udbp_detach),
255 static driver_t udbp_driver = {
257 .methods = udbp_methods,
258 .size = sizeof(struct udbp_softc),
261 DRIVER_MODULE(udbp, uhub, udbp_driver, udbp_devclass, udbp_modload, 0);
262 MODULE_DEPEND(udbp, netgraph, NG_ABI_VERSION, NG_ABI_VERSION, NG_ABI_VERSION);
263 MODULE_DEPEND(udbp, usb, 1, 1, 1);
264 MODULE_VERSION(udbp, 1);
267 udbp_modload(module_t mod, int event, void *data)
273 error = ng_newtype(&ng_udbp_typestruct);
275 printf("%s: Could not register "
276 "Netgraph node type, error=%d\n",
277 NG_UDBP_NODE_TYPE, error);
282 error = ng_rmtype(&ng_udbp_typestruct);
292 static const STRUCT_USB_HOST_ID udbp_devs[] = {
293 {USB_VPI(USB_VENDOR_NETCHIP, USB_PRODUCT_NETCHIP_TURBOCONNECT, 0)},
294 {USB_VPI(USB_VENDOR_NETCHIP, USB_PRODUCT_NETCHIP_GADGETZERO, 0)},
295 {USB_VPI(USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2301, 0)},
296 {USB_VPI(USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2302, 0)},
297 {USB_VPI(USB_VENDOR_ANCHOR, USB_PRODUCT_ANCHOR_EZLINK, 0)},
298 {USB_VPI(USB_VENDOR_GENESYS, USB_PRODUCT_GENESYS_GL620USB, 0)},
302 udbp_probe(device_t dev)
304 struct usb_attach_arg *uaa = device_get_ivars(dev);
306 if (uaa->usb_mode != USB_MODE_HOST)
308 if (uaa->info.bConfigIndex != 0)
310 if (uaa->info.bIfaceIndex != 0)
313 return (usbd_lookup_id_by_uaa(udbp_devs, sizeof(udbp_devs), uaa));
317 udbp_attach(device_t dev)
319 struct usb_attach_arg *uaa = device_get_ivars(dev);
320 struct udbp_softc *sc = device_get_softc(dev);
323 device_set_usb_desc(dev);
325 snprintf(sc->sc_name, sizeof(sc->sc_name),
326 "%s", device_get_nameunit(dev));
328 mtx_init(&sc->sc_mtx, "udbp lock", NULL, MTX_DEF | MTX_RECURSE);
330 error = usbd_transfer_setup(uaa->device, &uaa->info.bIfaceIndex,
331 sc->sc_xfer, udbp_config, UDBP_T_MAX, sc, &sc->sc_mtx);
333 DPRINTF("error=%s\n", usbd_errstr(error));
336 NG_BT_MBUFQ_INIT(&sc->sc_xmitq, UDBP_Q_MAXLEN);
338 NG_BT_MBUFQ_INIT(&sc->sc_xmitq_hipri, UDBP_Q_MAXLEN);
340 /* create Netgraph node */
342 if (ng_make_node_common(&ng_udbp_typestruct, &sc->sc_node) != 0) {
343 printf("%s: Could not create Netgraph node\n",
350 if (ng_name_node(sc->sc_node, sc->sc_name) != 0) {
351 printf("%s: Could not name node\n",
353 NG_NODE_UNREF(sc->sc_node);
357 NG_NODE_SET_PRIVATE(sc->sc_node, sc);
359 /* the device is now operational */
361 return (0); /* success */
365 return (ENOMEM); /* failure */
369 udbp_detach(device_t dev)
371 struct udbp_softc *sc = device_get_softc(dev);
373 /* destroy Netgraph node */
375 if (sc->sc_node != NULL) {
376 NG_NODE_SET_PRIVATE(sc->sc_node, NULL);
377 ng_rmnode_self(sc->sc_node);
380 /* free USB transfers, if any */
382 usbd_transfer_unsetup(sc->sc_xfer, UDBP_T_MAX);
384 mtx_destroy(&sc->sc_mtx);
388 NG_BT_MBUFQ_DESTROY(&sc->sc_xmitq);
389 NG_BT_MBUFQ_DESTROY(&sc->sc_xmitq_hipri);
393 if (sc->sc_bulk_in_buffer) {
394 m_freem(sc->sc_bulk_in_buffer);
395 sc->sc_bulk_in_buffer = NULL;
397 return (0); /* success */
401 udbp_bulk_read_callback(struct usb_xfer *xfer, usb_error_t error)
403 struct udbp_softc *sc = usbd_xfer_softc(xfer);
404 struct usb_page_cache *pc;
408 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
410 switch (USB_GET_STATE(xfer)) {
411 case USB_ST_TRANSFERRED:
413 /* allocate new mbuf */
415 MGETHDR(m, M_NOWAIT, MT_DATA);
421 if (!(MCLGET(m, M_NOWAIT))) {
425 m->m_pkthdr.len = m->m_len = actlen;
427 pc = usbd_xfer_get_frame(xfer, 0);
428 usbd_copy_out(pc, 0, m->m_data, actlen);
430 sc->sc_bulk_in_buffer = m;
432 DPRINTF("received package %d bytes\n", actlen);
436 if (sc->sc_bulk_in_buffer) {
437 ng_send_fn(sc->sc_node, NULL, &udbp_bulk_read_complete, NULL, 0);
440 if (sc->sc_flags & UDBP_FLAG_READ_STALL) {
441 usbd_transfer_start(sc->sc_xfer[UDBP_T_RD_CS]);
444 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
445 usbd_transfer_submit(xfer);
449 if (error != USB_ERR_CANCELLED) {
450 /* try to clear stall first */
451 sc->sc_flags |= UDBP_FLAG_READ_STALL;
452 usbd_transfer_start(sc->sc_xfer[UDBP_T_RD_CS]);
460 udbp_bulk_read_clear_stall_callback(struct usb_xfer *xfer, usb_error_t error)
462 struct udbp_softc *sc = usbd_xfer_softc(xfer);
463 struct usb_xfer *xfer_other = sc->sc_xfer[UDBP_T_RD];
465 if (usbd_clear_stall_callback(xfer, xfer_other)) {
466 DPRINTF("stall cleared\n");
467 sc->sc_flags &= ~UDBP_FLAG_READ_STALL;
468 usbd_transfer_start(xfer_other);
473 udbp_bulk_read_complete(node_p node, hook_p hook, void *arg1, int arg2)
475 struct udbp_softc *sc = NG_NODE_PRIVATE(node);
482 mtx_lock(&sc->sc_mtx);
484 m = sc->sc_bulk_in_buffer;
488 sc->sc_bulk_in_buffer = NULL;
490 if ((sc->sc_hook == NULL) ||
491 NG_HOOK_NOT_VALID(sc->sc_hook)) {
492 DPRINTF("No upstream hook\n");
497 NG_SEND_DATA_ONLY(error, sc->sc_hook, m);
505 /* start USB bulk-in transfer, if not already started */
507 usbd_transfer_start(sc->sc_xfer[UDBP_T_RD]);
509 mtx_unlock(&sc->sc_mtx);
513 udbp_bulk_write_callback(struct usb_xfer *xfer, usb_error_t error)
515 struct udbp_softc *sc = usbd_xfer_softc(xfer);
516 struct usb_page_cache *pc;
519 switch (USB_GET_STATE(xfer)) {
520 case USB_ST_TRANSFERRED:
522 sc->sc_packets_out++;
525 if (sc->sc_flags & UDBP_FLAG_WRITE_STALL) {
526 usbd_transfer_start(sc->sc_xfer[UDBP_T_WR_CS]);
529 /* get next mbuf, if any */
531 NG_BT_MBUFQ_DEQUEUE(&sc->sc_xmitq_hipri, m);
533 NG_BT_MBUFQ_DEQUEUE(&sc->sc_xmitq, m);
535 DPRINTF("Data queue is empty\n");
539 if (m->m_pkthdr.len > MCLBYTES) {
540 DPRINTF("truncating large packet "
541 "from %d to %d bytes\n", m->m_pkthdr.len,
543 m->m_pkthdr.len = MCLBYTES;
545 pc = usbd_xfer_get_frame(xfer, 0);
546 usbd_m_copy_in(pc, 0, m, 0, m->m_pkthdr.len);
548 usbd_xfer_set_frame_len(xfer, 0, m->m_pkthdr.len);
550 DPRINTF("packet out: %d bytes\n", m->m_pkthdr.len);
554 usbd_transfer_submit(xfer);
558 if (error != USB_ERR_CANCELLED) {
559 /* try to clear stall first */
560 sc->sc_flags |= UDBP_FLAG_WRITE_STALL;
561 usbd_transfer_start(sc->sc_xfer[UDBP_T_WR_CS]);
569 udbp_bulk_write_clear_stall_callback(struct usb_xfer *xfer, usb_error_t error)
571 struct udbp_softc *sc = usbd_xfer_softc(xfer);
572 struct usb_xfer *xfer_other = sc->sc_xfer[UDBP_T_WR];
574 if (usbd_clear_stall_callback(xfer, xfer_other)) {
575 DPRINTF("stall cleared\n");
576 sc->sc_flags &= ~UDBP_FLAG_WRITE_STALL;
577 usbd_transfer_start(xfer_other);
581 /***********************************************************************
582 * Start of Netgraph methods
583 **********************************************************************/
586 * If this is a device node so this work is done in the attach()
587 * routine and the constructor will return EINVAL as you should not be able
588 * to create nodes that depend on hardware (unless you can add the hardware :)
591 ng_udbp_constructor(node_p node)
597 * Give our ok for a hook to be added...
598 * If we are not running this might kick a device into life.
599 * Possibly decode information out of the hook name.
600 * Add the hook's private info to the hook structure.
601 * (if we had some). In this example, we assume that there is a
602 * an array of structs, called 'channel' in the private info,
603 * one for each active channel. The private
604 * pointer of each hook points to the appropriate UDBP_hookinfo struct
605 * so that the source of an input packet is easily identified.
608 ng_udbp_newhook(node_p node, hook_p hook, const char *name)
610 struct udbp_softc *sc = NG_NODE_PRIVATE(node);
613 if (strcmp(name, NG_UDBP_HOOK_NAME)) {
616 mtx_lock(&sc->sc_mtx);
618 if (sc->sc_hook != NULL) {
622 NG_HOOK_SET_PRIVATE(hook, NULL);
625 mtx_unlock(&sc->sc_mtx);
631 * Get a netgraph control message.
632 * Check it is one we understand. If needed, send a response.
633 * We could save the address for an async action later, but don't here.
634 * Always free the message.
635 * The response should be in a malloc'd region that the caller can 'free'.
636 * A response is not required.
637 * Theoretically you could respond defferently to old message types if
638 * the cookie in the header didn't match what we consider to be current
639 * (so that old userland programs could continue to work).
642 ng_udbp_rcvmsg(node_p node, item_p item, hook_p lasthook)
644 struct udbp_softc *sc = NG_NODE_PRIVATE(node);
645 struct ng_mesg *resp = NULL;
649 NGI_GET_MSG(item, msg);
650 /* Deal with message according to cookie and command */
651 switch (msg->header.typecookie) {
652 case NGM_UDBP_COOKIE:
653 switch (msg->header.cmd) {
654 case NGM_UDBP_GET_STATUS:
656 struct ngudbpstat *stats;
658 NG_MKRESPONSE(resp, msg, sizeof(*stats), M_NOWAIT);
663 stats = (struct ngudbpstat *)resp->data;
664 mtx_lock(&sc->sc_mtx);
665 stats->packets_in = sc->sc_packets_in;
666 stats->packets_out = sc->sc_packets_out;
667 mtx_unlock(&sc->sc_mtx);
670 case NGM_UDBP_SET_FLAG:
671 if (msg->header.arglen != sizeof(uint32_t)) {
675 DPRINTF("flags = 0x%08x\n",
676 *((uint32_t *)msg->data));
679 error = EINVAL; /* unknown command */
684 error = EINVAL; /* unknown cookie type */
688 /* Take care of synchronous response, if any */
689 NG_RESPOND_MSG(error, node, item, resp);
695 * Accept data from the hook and queue it for output.
698 ng_udbp_rcvdata(hook_p hook, item_p item)
700 struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
701 struct ng_bt_mbufq *queue_ptr;
703 struct ng_tag_prio *ptag;
714 * Now queue the data for when it can be sent
716 ptag = (void *)m_tag_locate(m, NGM_GENERIC_COOKIE,
719 if (ptag && (ptag->priority > NG_PRIO_CUTOFF))
720 queue_ptr = &sc->sc_xmitq_hipri;
722 queue_ptr = &sc->sc_xmitq;
724 mtx_lock(&sc->sc_mtx);
726 if (NG_BT_MBUFQ_FULL(queue_ptr)) {
727 NG_BT_MBUFQ_DROP(queue_ptr);
731 NG_BT_MBUFQ_ENQUEUE(queue_ptr, m);
733 * start bulk-out transfer, if not already started:
735 usbd_transfer_start(sc->sc_xfer[UDBP_T_WR]);
739 mtx_unlock(&sc->sc_mtx);
745 * Do local shutdown processing..
746 * We are a persistant device, we refuse to go away, and
747 * only remove our links and reset ourself.
750 ng_udbp_rmnode(node_p node)
752 struct udbp_softc *sc = NG_NODE_PRIVATE(node);
754 /* Let old node go */
755 NG_NODE_SET_PRIVATE(node, NULL);
756 NG_NODE_UNREF(node); /* forget it ever existed */
761 /* Create Netgraph node */
762 if (ng_make_node_common(&ng_udbp_typestruct, &sc->sc_node) != 0) {
763 printf("%s: Could not create Netgraph node\n",
769 if (ng_name_node(sc->sc_node, sc->sc_name) != 0) {
770 printf("%s: Could not name Netgraph node\n",
772 NG_NODE_UNREF(sc->sc_node);
776 NG_NODE_SET_PRIVATE(sc->sc_node, sc);
780 mtx_unlock(&sc->sc_mtx);
786 * This is called once we've already connected a new hook to the other node.
787 * It gives us a chance to balk at the last minute.
790 ng_udbp_connect(hook_p hook)
792 struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
794 /* probably not at splnet, force outward queueing */
795 NG_HOOK_FORCE_QUEUE(NG_HOOK_PEER(hook));
797 mtx_lock(&sc->sc_mtx);
799 sc->sc_flags |= (UDBP_FLAG_READ_STALL |
800 UDBP_FLAG_WRITE_STALL);
802 /* start bulk-in transfer */
803 usbd_transfer_start(sc->sc_xfer[UDBP_T_RD]);
805 /* start bulk-out transfer */
806 usbd_transfer_start(sc->sc_xfer[UDBP_T_WR]);
808 mtx_unlock(&sc->sc_mtx);
816 * For this type, removal of the last link destroys the node
819 ng_udbp_disconnect(hook_p hook)
821 struct udbp_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
826 mtx_lock(&sc->sc_mtx);
828 if (hook != sc->sc_hook) {
832 /* stop bulk-in transfer */
833 usbd_transfer_stop(sc->sc_xfer[UDBP_T_RD_CS]);
834 usbd_transfer_stop(sc->sc_xfer[UDBP_T_RD]);
836 /* stop bulk-out transfer */
837 usbd_transfer_stop(sc->sc_xfer[UDBP_T_WR_CS]);
838 usbd_transfer_stop(sc->sc_xfer[UDBP_T_WR]);
841 NG_BT_MBUFQ_DRAIN(&sc->sc_xmitq);
842 NG_BT_MBUFQ_DRAIN(&sc->sc_xmitq_hipri);
844 if (sc->sc_bulk_in_buffer) {
845 m_freem(sc->sc_bulk_in_buffer);
846 sc->sc_bulk_in_buffer = NULL;
851 mtx_unlock(&sc->sc_mtx);
853 if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
854 && (NG_NODE_IS_VALID(NG_HOOK_NODE(hook))))
855 ng_rmnode_self(NG_HOOK_NODE(hook));