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.
29 * $FreeBSD: src/sys/dev/usb/udbp.c,v 1.24 2003/08/24 17:55:55 obrien Exp $
30 * $DragonFly: src/sys/dev/usbmisc/udbp/Attic/udbp.c,v 1.12 2007/06/28 06:32:32 hasso Exp $
33 /* Driver for arbitrary double bulk pipe devices.
34 * The driver assumes that there will be the same driver on the other side.
36 * XXX Some more information on what the framing of the IP packets looks like.
38 * To take full advantage of bulk transmission, packets should be chosen
39 * between 1k and 5k in size (1k to make sure the sending side starts
40 * straming, and <5k to avoid overflowing the system with small TDs).
44 /* probe/attach/detach:
45 * Connect the driver to the hardware and netgraph
47 * udbp_setup_out_transfer(sc);
48 * Setup an outbound transfer. Only one transmit can be active at the same
50 * XXX If it is required that the driver is able to queue multiple requests
51 * let me know. That is slightly difficult, due to the fact that we
52 * cannot call usbd_alloc_xfer in int context.
54 * udbp_setup_in_transfer(sc)
55 * Prepare an in transfer that will be waiting for data to come in. It
56 * is submitted and sits there until data is available.
57 * The callback resubmits a new transfer on completion.
59 * The reason we submit a bulk in transfer is that USB does not know about
60 * interrupts. The bulk transfer continuously polls the device for data.
61 * While the device has no data available, the device NAKs the TDs. As soon
62 * as there is data, the transfer happens and the data comes flowing in.
64 * In case you were wondering, interrupt transfers happen exactly that way.
65 * It therefore doesn't make sense to use the interrupt pipe to signal
66 * 'data ready' and then schedule a bulk transfer to fetch it. That would
67 * incur a 2ms delay at least, without reducing bandwidth requirements.
73 #include <sys/param.h>
74 #include <sys/systm.h>
75 #include <sys/kernel.h>
76 #include <sys/malloc.h>
77 #include <sys/module.h>
81 #include <sys/select.h>
84 #include <sys/socket.h>
85 #include <sys/ctype.h>
86 #include <sys/errno.h>
87 #include <sys/sysctl.h>
88 #include <sys/thread2.h>
92 #include <dev/usb/usb.h>
93 #include <dev/usb/usbdi.h>
94 #include <dev/usb/usbdi_util.h>
95 #include <dev/usb/usbdivar.h>
96 #include <dev/usb/usbhid.h>
98 #include <dev/usb/usbdevs.h>
101 #include <netgraph/ng_message.h>
102 #include <netgraph/ng_parse.h>
103 #include <dev/usb/udbp.h>
104 #include <netgraph/netgraph.h>
107 #define DPRINTF(x) if (udbpdebug) logprintf x
108 #define DPRINTFN(n,x) if (udbpdebug>(n)) logprintf x
110 SYSCTL_NODE(_hw_usb, OID_AUTO, udbp, CTLFLAG_RW, 0, "USB udbp");
111 SYSCTL_INT(_hw_usb_udbp, OID_AUTO, debug, CTLFLAG_RW,
112 &udbpdebug, 0, "udbp debug level");
115 #define DPRINTFN(n,x)
118 #define MS_TO_TICKS(ms) ((ms) * hz / 1000)
120 #define UDBP_TIMEOUT 2000 /* timeout on outbound transfers, in msecs */
121 #define UDBP_BUFFERSIZE 2048 /* maximum number of bytes in one transfer */
125 device_t sc_dev; /* base device */
126 usbd_interface_handle sc_iface;
128 usbd_pipe_handle sc_bulkin_pipe;
130 usbd_xfer_handle sc_bulkin_xfer;
131 void *sc_bulkin_buffer;
132 int sc_bulkin_bufferlen;
133 int sc_bulkin_datalen;
135 usbd_pipe_handle sc_bulkout_pipe;
137 usbd_xfer_handle sc_bulkout_xfer;
138 void *sc_bulkout_buffer;
139 int sc_bulkout_bufferlen;
140 int sc_bulkout_datalen;
143 # define DISCONNECTED 0x01
144 # define OUT_BUSY 0x02
145 # define NETGRAPH_INITIALISED 0x04
146 node_p node; /* back pointer to node */
147 hook_p hook; /* pointer to the hook */
148 u_int packets_in; /* packets in from downstream */
149 u_int packets_out; /* packets out towards downstream */
150 struct ifqueue xmitq_hipri; /* hi-priority transmit queue */
151 struct ifqueue xmitq; /* low-priority transmit queue */
154 typedef struct udbp_softc *udbp_p;
158 static ng_constructor_t ng_udbp_constructor;
159 static ng_rcvmsg_t ng_udbp_rcvmsg;
160 static ng_shutdown_t ng_udbp_rmnode;
161 static ng_newhook_t ng_udbp_newhook;
162 static ng_connect_t ng_udbp_connect;
163 static ng_rcvdata_t ng_udbp_rcvdata;
164 static ng_disconnect_t ng_udbp_disconnect;
166 /* Parse type for struct ngudbpstat */
167 static const struct ng_parse_struct_field
168 ng_udbp_stat_type_fields[] = NG_UDBP_STATS_TYPE_INFO;
169 static const struct ng_parse_type ng_udbp_stat_type = {
170 &ng_parse_struct_type,
171 &ng_udbp_stat_type_fields
174 /* List of commands and how to convert arguments to/from ASCII */
175 static const struct ng_cmdlist ng_udbp_cmdlist[] = {
187 &ng_parse_int32_type,
193 /* Netgraph node type descriptor */
194 static struct ng_type ng_udbp_typestruct = {
209 static int udbp_setup_in_transfer (udbp_p sc);
210 static void udbp_in_transfer_cb (usbd_xfer_handle xfer,
211 usbd_private_handle priv,
214 static int udbp_setup_out_transfer (udbp_p sc);
215 static void udbp_out_transfer_cb (usbd_xfer_handle xfer,
216 usbd_private_handle priv,
219 USB_DECLARE_DRIVER(udbp);
223 USB_MATCH_START(udbp, uaa);
224 usb_interface_descriptor_t *id;
226 return (UMATCH_NONE);
227 id = usbd_get_interface_descriptor(uaa->iface);
229 /* XXX Julian, add the id of the device if you have one to test
230 * things with. run 'usbdevs -v' and note the 3 ID's that appear.
231 * The Vendor Id and Product Id are in hex and the Revision Id is in
232 * bcd. But as usual if the revision is 0x101 then you should compare
233 * the revision id in the device descriptor with 0x101
234 * Or go search the file usbdevs.h. Maybe the device is already in
237 if ((uaa->vendor == USB_VENDOR_NETCHIP &&
238 uaa->product == USB_PRODUCT_NETCHIP_TURBOCONNECT))
239 return(UMATCH_VENDOR_PRODUCT);
241 if ((uaa->vendor == USB_VENDOR_PROLIFIC &&
242 (uaa->product == USB_PRODUCT_PROLIFIC_PL2301 ||
243 uaa->product == USB_PRODUCT_PROLIFIC_PL2302)))
244 return(UMATCH_VENDOR_PRODUCT);
246 if ((uaa->vendor == USB_VENDOR_ANCHOR &&
247 uaa->product == USB_PRODUCT_ANCHOR_EZLINK))
248 return(UMATCH_VENDOR_PRODUCT);
250 return (UMATCH_NONE);
255 USB_ATTACH_START(udbp, sc, uaa);
256 usbd_interface_handle iface = uaa->iface;
257 usb_interface_descriptor_t *id;
258 usb_endpoint_descriptor_t *ed, *ed_bulkin = NULL, *ed_bulkout = NULL;
262 static int ngudbp_done_init=0;
264 sc->flags |= DISCONNECTED;
265 /* fetch the interface handle for the first interface */
266 (void) usbd_device2interface_handle(uaa->device, 0, &iface);
267 id = usbd_get_interface_descriptor(iface);
268 usbd_devinfo(uaa->device, 0, devinfo);
270 kprintf("%s: %s, iclass %d/%d\n", device_get_nameunit(sc->sc_dev),
271 devinfo, id->bInterfaceClass, id->bInterfaceSubClass);
273 /* Find the two first bulk endpoints */
274 for (i = 0 ; i < id->bNumEndpoints; i++) {
275 ed = usbd_interface2endpoint_descriptor(iface, i);
277 kprintf("%s: could not read endpoint descriptor\n",
278 device_get_nameunit(sc->sc_dev));
279 USB_ATTACH_ERROR_RETURN;
282 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN
283 && (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) {
285 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT
286 && (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) {
290 if (ed_bulkin && ed_bulkout) /* found all we need */
294 /* Verify that we goething sensible */
295 if (ed_bulkin == NULL || ed_bulkout == NULL) {
296 kprintf("%s: bulk-in and/or bulk-out endpoint not found\n",
297 device_get_nameunit(sc->sc_dev));
298 USB_ATTACH_ERROR_RETURN;
301 if (ed_bulkin->wMaxPacketSize[0] != ed_bulkout->wMaxPacketSize[0] ||
302 ed_bulkin->wMaxPacketSize[1] != ed_bulkout->wMaxPacketSize[1]) {
303 kprintf("%s: bulk-in and bulk-out have different packet sizes %d %d %d %d\n",
304 device_get_nameunit(sc->sc_dev),
305 ed_bulkin->wMaxPacketSize[0],
306 ed_bulkout->wMaxPacketSize[0],
307 ed_bulkin->wMaxPacketSize[1],
308 ed_bulkout->wMaxPacketSize[1]);
309 USB_ATTACH_ERROR_RETURN;
312 sc->sc_bulkin = ed_bulkin->bEndpointAddress;
313 sc->sc_bulkout = ed_bulkout->bEndpointAddress;
315 DPRINTF(("%s: Bulk-in: 0x%02x, bulk-out 0x%02x, packet size = %d\n",
316 device_get_nameunit(sc->sc_dev), sc->sc_bulkin, sc->sc_bulkout,
317 ed_bulkin->wMaxPacketSize[0]));
319 /* Allocate the in transfer struct */
320 sc->sc_bulkin_xfer = usbd_alloc_xfer(uaa->device);
321 if (!sc->sc_bulkin_xfer) {
324 sc->sc_bulkout_xfer = usbd_alloc_xfer(uaa->device);
325 if (!sc->sc_bulkout_xfer) {
328 sc->sc_bulkin_buffer = kmalloc(UDBP_BUFFERSIZE, M_USBDEV, M_INTWAIT);
329 if (!sc->sc_bulkin_buffer) {
332 sc->sc_bulkout_buffer = kmalloc(UDBP_BUFFERSIZE, M_USBDEV, M_INTWAIT);
333 if (!sc->sc_bulkout_xfer || !sc->sc_bulkout_buffer) {
336 sc->sc_bulkin_bufferlen = UDBP_BUFFERSIZE;
337 sc->sc_bulkout_bufferlen = UDBP_BUFFERSIZE;
339 /* We have decided on which endpoints to use, now open the pipes */
340 err = usbd_open_pipe(iface, sc->sc_bulkin,
341 USBD_EXCLUSIVE_USE, &sc->sc_bulkin_pipe);
343 kprintf("%s: cannot open bulk-in pipe (addr %d)\n",
344 device_get_nameunit(sc->sc_dev), sc->sc_bulkin);
347 err = usbd_open_pipe(iface, sc->sc_bulkout,
348 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe);
350 kprintf("%s: cannot open bulk-out pipe (addr %d)\n",
351 device_get_nameunit(sc->sc_dev), sc->sc_bulkout);
355 if (!ngudbp_done_init){
357 if (ng_newtype(&ng_udbp_typestruct)) {
358 kprintf("ngudbp install failed\n");
363 if ((err = ng_make_node_common(&ng_udbp_typestruct, &sc->node)) == 0) {
365 ksprintf(nodename, "%s", device_get_nameunit(sc->sc_dev));
366 if ((err = ng_name_node(sc->node, nodename))) {
367 NG_NODE_UNREF(sc->node);
371 NG_NODE_SET_PRIVATE(sc->node, sc);
372 sc->xmitq.ifq_maxlen = IFQ_MAXLEN;
373 sc->xmitq_hipri.ifq_maxlen = IFQ_MAXLEN;
374 mtx_init(&sc->xmitq.ifq_mtx, "usb_xmitq", NULL,
376 mtx_init(&sc->xmitq_hipri.ifq_mtx,
377 "usb_xmitq_hipri", NULL, MTX_DEF);
380 sc->flags = NETGRAPH_INITIALISED;
381 /* sc->flags &= ~DISCONNECTED; */ /* XXX */
384 /* the device is now operational */
387 /* schedule the first incoming xfer */
388 err = udbp_setup_in_transfer(sc);
392 USB_ATTACH_SUCCESS_RETURN;
394 #if 0 /* probably done in udbp_detach() */
395 if (sc->sc_bulkout_buffer) {
396 FREE(sc->sc_bulkout_buffer, M_USBDEV);
398 if (sc->sc_bulkin_buffer) {
399 FREE(sc->sc_bulkin_buffer, M_USBDEV);
401 if (sc->sc_bulkout_xfer) {
402 usbd_free_xfer(sc->sc_bulkout_xfer);
404 if (sc->sc_bulkin_xfer) {
405 usbd_free_xfer(sc->sc_bulkin_xfer);
409 USB_ATTACH_ERROR_RETURN;
415 USB_DETACH_START(udbp, sc);
417 sc->flags |= DISCONNECTED;
419 DPRINTF(("%s: disconnected\n", device_get_nameunit(self)));
421 if (sc->sc_bulkin_pipe) {
422 usbd_abort_pipe(sc->sc_bulkin_pipe);
423 usbd_close_pipe(sc->sc_bulkin_pipe);
425 if (sc->sc_bulkout_pipe) {
426 usbd_abort_pipe(sc->sc_bulkout_pipe);
427 usbd_close_pipe(sc->sc_bulkout_pipe);
430 if (sc->flags & NETGRAPH_INITIALISED) {
431 ng_rmnode_self(sc->node);
432 NG_NODE_SET_PRIVATE(sc->node, NULL);
433 NG_NODE_UNREF(sc->node);
434 sc->node = NULL; /* Paranoid */
437 if (sc->sc_bulkin_xfer)
438 usbd_free_xfer(sc->sc_bulkin_xfer);
439 if (sc->sc_bulkout_xfer)
440 usbd_free_xfer(sc->sc_bulkout_xfer);
442 if (sc->sc_bulkin_buffer)
443 kfree(sc->sc_bulkin_buffer, M_USBDEV);
444 if (sc->sc_bulkout_buffer)
445 kfree(sc->sc_bulkout_buffer, M_USBDEV);
451 udbp_setup_in_transfer(udbp_p sc)
453 void *priv = sc; /* XXX this should probably be some pointer to
454 * struct describing the transfer (mbuf?)
460 * How should we arrange for 2 extra bytes at the start of the
464 /* Initialise a USB transfer and then schedule it */
466 (void) usbd_setup_xfer( sc->sc_bulkin_xfer,
469 sc->sc_bulkin_buffer,
470 sc->sc_bulkin_bufferlen,
473 udbp_in_transfer_cb);
475 err = usbd_transfer(sc->sc_bulkin_xfer);
476 if (err && err != USBD_IN_PROGRESS) {
477 DPRINTF(("%s: failed to setup in-transfer, %s\n",
478 device_get_nameunit(sc->sc_dev), usbd_errstr(err)));
482 return (USBD_NORMAL_COMPLETION);
486 udbp_in_transfer_cb(usbd_xfer_handle xfer, usbd_private_handle priv,
489 udbp_p sc = priv; /* XXX see priv above */
495 if (err != USBD_CANCELLED) {
496 DPRINTF(("%s: bulk-out transfer failed: %s\n",
497 device_get_nameunit(sc->sc_dev), usbd_errstr(err)));
499 /* USBD_CANCELLED happens at unload of the driver */
503 /* Transfer has failed, packet is not received */
510 /* get packet from device and send on */
511 m = m_devget(sc->sc_bulkin_buffer, len, 0, NULL, NULL);
512 NG_SEND_DATA_ONLY(err, sc->hook, m);
517 /* schedule the next in transfer */
518 udbp_setup_in_transfer(sc);
523 udbp_setup_out_transfer(udbp_p sc)
525 void *priv = sc; /* XXX this should probably be some pointer to
526 * struct describing the transfer (mbuf?)
534 if (sc->flags & OUT_BUSY)
535 panic("out transfer already in use, we should add queuing");
536 sc->flags |= OUT_BUSY;
539 IF_DEQUEUE(&sc->xmitq_hipri, m);
541 IF_DEQUEUE(&sc->xmitq, m);
546 sc->flags &= ~OUT_BUSY;
547 return (USBD_NORMAL_COMPLETION);
550 pktlen = m->m_pkthdr.len;
551 if (pktlen > sc->sc_bulkout_bufferlen) {
552 kprintf("%s: Packet too large, %d > %d\n",
553 device_get_nameunit(sc->sc_dev), pktlen,
554 sc->sc_bulkout_bufferlen);
555 return (USBD_IOERROR);
558 m_copydata(m, 0, pktlen, sc->sc_bulkout_buffer);
561 /* Initialise a USB transfer and then schedule it */
563 (void) usbd_setup_xfer( sc->sc_bulkout_xfer,
566 sc->sc_bulkout_buffer,
570 udbp_out_transfer_cb);
572 err = usbd_transfer(sc->sc_bulkout_xfer);
573 if (err && err != USBD_IN_PROGRESS) {
574 DPRINTF(("%s: failed to setup out-transfer, %s\n",
575 device_get_nameunit(sc->sc_dev), usbd_errstr(err)));
579 return (USBD_NORMAL_COMPLETION);
583 udbp_out_transfer_cb(usbd_xfer_handle xfer, usbd_private_handle priv,
586 udbp_p sc = priv; /* XXX see priv above */
589 DPRINTF(("%s: bulk-out transfer failed: %s\n",
590 device_get_nameunit(sc->sc_dev), usbd_errstr(err)));
591 /* Transfer has failed, packet is not transmitted */
592 /* XXX Invalidate packet */
596 /* packet has been transmitted */
599 sc->flags &= ~OUT_BUSY;
600 udbp_setup_out_transfer(sc);
604 DRIVER_MODULE(udbp, uhub, udbp_driver, udbp_devclass, usbd_driver_load, 0);
605 MODULE_DEPEND(udbp, netgraph, NG_ABI_VERSION, NG_ABI_VERSION, NG_ABI_VERSION);
608 /***********************************************************************
609 * Start of Netgraph methods
610 **********************************************************************/
613 * If this is a device node so this work is done in the attach()
614 * routine and the constructor will return EINVAL as you should not be able
615 * to create nodes that depend on hardware (unless you can add the hardware :)
618 ng_udbp_constructor(node_p node)
624 * Give our ok for a hook to be added...
625 * If we are not running this might kick a device into life.
626 * Possibly decode information out of the hook name.
627 * Add the hook's private info to the hook structure.
628 * (if we had some). In this example, we assume that there is a
629 * an array of structs, called 'channel' in the private info,
630 * one for each active channel. The private
631 * pointer of each hook points to the appropriate UDBP_hookinfo struct
632 * so that the source of an input packet is easily identified.
635 ng_udbp_newhook(node_p node, hook_p hook, const char *name)
637 const udbp_p sc = NG_NODE_PRIVATE(node);
640 /* Possibly start up the device if it's not already going */
641 if ((sc->flags & SCF_RUNNING) == 0) {
642 ng_udbp_start_hardware(sc);
646 if (strcmp(name, NG_UDBP_HOOK_NAME) == 0) {
648 NG_HOOK_SET_PRIVATE(hook, NULL);
650 return (EINVAL); /* not a hook we know about */
656 * Get a netgraph control message.
657 * Check it is one we understand. If needed, send a response.
658 * We could save the address for an async action later, but don't here.
659 * Always free the message.
660 * The response should be in a malloc'd region that the caller can 'free'.
661 * A response is not required.
662 * Theoretically you could respond defferently to old message types if
663 * the cookie in the header didn't match what we consider to be current
664 * (so that old userland programs could continue to work).
667 ng_udbp_rcvmsg(node_p node, item_p item, hook_p lasthook)
669 const udbp_p sc = NG_NODE_PRIVATE(node);
670 struct ng_mesg *resp = NULL;
674 NGI_GET_MSG(item, msg);
675 /* Deal with message according to cookie and command */
676 switch (msg->header.typecookie) {
677 case NGM_UDBP_COOKIE:
678 switch (msg->header.cmd) {
679 case NGM_UDBP_GET_STATUS:
681 struct ngudbpstat *stats;
683 NG_MKRESPONSE(resp, msg, sizeof(*stats), M_NOWAIT);
688 stats = (struct ngudbpstat *) resp->data;
689 stats->packets_in = sc->packets_in;
690 stats->packets_out = sc->packets_out;
693 case NGM_UDBP_SET_FLAG:
694 if (msg->header.arglen != sizeof(u_int32_t)) {
698 sc->flags = *((u_int32_t *) msg->data);
701 error = EINVAL; /* unknown command */
706 error = EINVAL; /* unknown cookie type */
710 /* Take care of synchronous response, if any */
711 NG_RESPOND_MSG(error, node, item, resp);
717 * Accept data from the hook and queue it for output.
720 ng_udbp_rcvdata(hook_p hook, item_p item)
722 const udbp_p sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
724 struct ifqueue *xmitq_p;
729 NGI_GET_META(item, meta);
732 * Now queue the data for when it can be sent
734 if (meta && meta->priority > 0) {
735 xmitq_p = (&sc->xmitq_hipri);
737 xmitq_p = (&sc->xmitq);
740 if (IF_QFULL(xmitq_p)) {
746 IF_ENQUEUE(xmitq_p, m);
747 if (!(sc->flags & OUT_BUSY))
748 udbp_setup_out_transfer(sc);
753 * It was an error case.
754 * check if we need to free the mbuf, and then return the error
762 * Do local shutdown processing..
763 * We are a persistant device, we refuse to go away, and
764 * only remove our links and reset ourself.
767 ng_udbp_rmnode(node_p node)
769 const udbp_p sc = NG_NODE_PRIVATE(node);
772 if (sc->flags & DISCONNECTED) {
774 * WE are really going away.. hardware must have gone.
775 * Assume that the hardware drive part will clear up the
776 * sc, in fact it may already have done so..
777 * In which case we may have just segfaulted..XXX
782 /* stolen from attach routine */
783 /* Drain the queues */
784 IF_DRAIN(&sc->xmitq_hipri);
785 IF_DRAIN(&sc->xmitq);
787 sc->packets_in = 0; /* reset stats */
789 NG_NODE_UNREF(node); /* forget it ever existed */
791 if ((err = ng_make_node_common(&ng_udbp_typestruct, &sc->node)) == 0) {
793 ksprintf(nodename, "%s", device_get_nameunit(sc->sc_dev));
794 if ((err = ng_name_node(sc->node, nodename))) {
795 NG_NODE_UNREF(sc->node); /* out damned spot! */
796 sc->flags &= ~NETGRAPH_INITIALISED;
799 NG_NODE_SET_PRIVATE(sc->node, sc);
806 * This is called once we've already connected a new hook to the other node.
807 * It gives us a chance to balk at the last minute.
810 ng_udbp_connect(hook_p hook)
812 /* probably not at splnet, force outward queueing */
813 NG_HOOK_FORCE_QUEUE(NG_HOOK_PEER(hook));
814 /* be really amiable and just say "YUP that's OK by me! " */
821 * For this type, removal of the last link destroys the node
824 ng_udbp_disconnect(hook_p hook)
826 const udbp_p sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
829 if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
830 && (NG_NODE_IS_VALID(NG_HOOK_NODE(hook))))
831 ng_rmnode_self(NG_HOOK_NODE(hook));