3 * Copyright (c) 2009 Andrew Thompson (thompsa@FreeBSD.org)
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.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/stdint.h>
28 #include <sys/stddef.h>
29 #include <sys/param.h>
30 #include <sys/queue.h>
31 #include <sys/types.h>
32 #include <sys/systm.h>
33 #include <sys/kernel.h>
35 #include <sys/linker_set.h>
36 #include <sys/module.h>
38 #include <sys/mutex.h>
39 #include <sys/condvar.h>
40 #include <sys/sysctl.h>
42 #include <sys/unistd.h>
43 #include <sys/callout.h>
44 #include <sys/malloc.h>
47 #include <dev/usb/usb.h>
48 #include <dev/usb/usbdi.h>
50 #include <dev/usb/usb_process.h>
51 #include <dev/usb/net/usb_ethernet.h>
53 SYSCTL_NODE(_net, OID_AUTO, ue, CTLFLAG_RD, 0, "USB Ethernet parameters");
55 #define UE_LOCK(_ue) mtx_lock((_ue)->ue_mtx)
56 #define UE_UNLOCK(_ue) mtx_unlock((_ue)->ue_mtx)
57 #define UE_LOCK_ASSERT(_ue, t) mtx_assert((_ue)->ue_mtx, t)
59 MODULE_DEPEND(uether, usb, 1, 1, 1);
60 MODULE_DEPEND(uether, miibus, 1, 1, 1);
62 static struct unrhdr *ueunit;
64 static usb_proc_callback_t ue_attach_post_task;
65 static usb_proc_callback_t ue_promisc_task;
66 static usb_proc_callback_t ue_setmulti_task;
67 static usb_proc_callback_t ue_ifmedia_task;
68 static usb_proc_callback_t ue_tick_task;
69 static usb_proc_callback_t ue_start_task;
70 static usb_proc_callback_t ue_stop_task;
72 static void ue_init(void *);
73 static void ue_start(struct ifnet *);
74 static int ue_ifmedia_upd(struct ifnet *);
75 static void ue_watchdog(void *);
80 * Else: device has been detached
83 uether_pause(struct usb_ether *ue, unsigned int _ticks)
85 if (usb_proc_is_gone(&ue->ue_tq)) {
89 usb_pause_mtx(ue->ue_mtx, _ticks);
94 ue_queue_command(struct usb_ether *ue,
95 usb_proc_callback_t *fn,
96 struct usb_proc_msg *t0, struct usb_proc_msg *t1)
98 struct usb_ether_cfg_task *task;
100 UE_LOCK_ASSERT(ue, MA_OWNED);
102 if (usb_proc_is_gone(&ue->ue_tq)) {
103 return; /* nothing to do */
106 * NOTE: The task cannot get executed before we drop the
107 * "sc_mtx" mutex. It is safe to update fields in the message
108 * structure after that the message got queued.
110 task = (struct usb_ether_cfg_task *)
111 usb_proc_msignal(&ue->ue_tq, t0, t1);
113 /* Setup callback and self pointers */
114 task->hdr.pm_callback = fn;
118 * Start and stop must be synchronous!
120 if ((fn == ue_start_task) || (fn == ue_stop_task))
121 usb_proc_mwait(&ue->ue_tq, t0, t1);
125 uether_getifp(struct usb_ether *ue)
131 uether_getmii(struct usb_ether *ue)
133 return (device_get_softc(ue->ue_miibus));
137 uether_getsc(struct usb_ether *ue)
143 ue_sysctl_parent(SYSCTL_HANDLER_ARGS)
145 struct usb_ether *ue = arg1;
148 name = device_get_nameunit(ue->ue_dev);
149 return SYSCTL_OUT(req, name, strlen(name));
153 uether_ifattach(struct usb_ether *ue)
157 /* check some critical parameters */
158 if ((ue->ue_dev == NULL) ||
159 (ue->ue_udev == NULL) ||
160 (ue->ue_mtx == NULL) ||
161 (ue->ue_methods == NULL))
164 error = usb_proc_create(&ue->ue_tq, ue->ue_mtx,
165 device_get_nameunit(ue->ue_dev), USB_PRI_MED);
167 device_printf(ue->ue_dev, "could not setup taskqueue\n");
171 /* fork rest of the attach code */
173 ue_queue_command(ue, ue_attach_post_task,
174 &ue->ue_sync_task[0].hdr,
175 &ue->ue_sync_task[1].hdr);
183 ue_attach_post_task(struct usb_proc_msg *_task)
185 struct usb_ether_cfg_task *task =
186 (struct usb_ether_cfg_task *)_task;
187 struct usb_ether *ue = task->ue;
190 char num[14]; /* sufficient for 32 bits */
192 /* first call driver's post attach routine */
193 ue->ue_methods->ue_attach_post(ue);
197 ue->ue_unit = alloc_unr(ueunit);
198 usb_callout_init_mtx(&ue->ue_watchdog, ue->ue_mtx, 0);
199 sysctl_ctx_init(&ue->ue_sysctl_ctx);
201 ifp = if_alloc(IFT_ETHER);
203 device_printf(ue->ue_dev, "could not allocate ifnet\n");
208 if_initname(ifp, "ue", ue->ue_unit);
209 ifp->if_mtu = ETHERMTU;
210 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
211 if (ue->ue_methods->ue_ioctl != NULL)
212 ifp->if_ioctl = ue->ue_methods->ue_ioctl;
214 ifp->if_ioctl = uether_ioctl;
215 ifp->if_start = ue_start;
216 ifp->if_init = ue_init;
217 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN);
218 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN;
219 IFQ_SET_READY(&ifp->if_snd);
222 if (ue->ue_methods->ue_mii_upd != NULL &&
223 ue->ue_methods->ue_mii_sts != NULL) {
225 error = mii_phy_probe(ue->ue_dev, &ue->ue_miibus,
226 ue_ifmedia_upd, ue->ue_methods->ue_mii_sts);
229 device_printf(ue->ue_dev, "MII without any PHY\n");
234 if_printf(ifp, "<USB Ethernet> on %s\n", device_get_nameunit(ue->ue_dev));
235 ether_ifattach(ifp, ue->ue_eaddr);
237 snprintf(num, sizeof(num), "%u", ue->ue_unit);
238 ue->ue_sysctl_oid = SYSCTL_ADD_NODE(&ue->ue_sysctl_ctx,
239 &SYSCTL_NODE_CHILDREN(_net, ue),
240 OID_AUTO, num, CTLFLAG_RD, NULL, "");
241 SYSCTL_ADD_PROC(&ue->ue_sysctl_ctx,
242 SYSCTL_CHILDREN(ue->ue_sysctl_oid), OID_AUTO,
243 "%parent", CTLFLAG_RD, ue, 0,
244 ue_sysctl_parent, "A", "parent device");
250 free_unr(ueunit, ue->ue_unit);
251 if (ue->ue_ifp != NULL) {
260 uether_ifdetach(struct usb_ether *ue)
264 /* wait for any post attach or other command to complete */
265 usb_proc_drain(&ue->ue_tq);
267 /* read "ifnet" pointer after taskqueue drain */
272 /* we are not running any more */
274 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
277 /* drain any callouts */
278 usb_callout_drain(&ue->ue_watchdog);
281 if (ue->ue_miibus != NULL) {
284 * It is up to the callers to provide the correct
287 device_delete_child(ue->ue_dev, ue->ue_miibus);
290 /* detach ethernet */
293 /* free interface instance */
297 sysctl_ctx_free(&ue->ue_sysctl_ctx);
300 free_unr(ueunit, ue->ue_unit);
303 /* free taskqueue, if any */
304 usb_proc_free(&ue->ue_tq);
308 uether_is_gone(struct usb_ether *ue)
310 return (usb_proc_is_gone(&ue->ue_tq));
316 struct usb_ether *ue = arg;
319 ue_queue_command(ue, ue_start_task,
320 &ue->ue_sync_task[0].hdr,
321 &ue->ue_sync_task[1].hdr);
326 ue_start_task(struct usb_proc_msg *_task)
328 struct usb_ether_cfg_task *task =
329 (struct usb_ether_cfg_task *)_task;
330 struct usb_ether *ue = task->ue;
331 struct ifnet *ifp = ue->ue_ifp;
333 UE_LOCK_ASSERT(ue, MA_OWNED);
335 ue->ue_methods->ue_init(ue);
337 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
340 if (ue->ue_methods->ue_tick != NULL)
341 usb_callout_reset(&ue->ue_watchdog, hz, ue_watchdog, ue);
345 ue_stop_task(struct usb_proc_msg *_task)
347 struct usb_ether_cfg_task *task =
348 (struct usb_ether_cfg_task *)_task;
349 struct usb_ether *ue = task->ue;
351 UE_LOCK_ASSERT(ue, MA_OWNED);
353 usb_callout_stop(&ue->ue_watchdog);
355 ue->ue_methods->ue_stop(ue);
359 ue_start(struct ifnet *ifp)
361 struct usb_ether *ue = ifp->if_softc;
363 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
367 ue->ue_methods->ue_start(ue);
372 ue_promisc_task(struct usb_proc_msg *_task)
374 struct usb_ether_cfg_task *task =
375 (struct usb_ether_cfg_task *)_task;
376 struct usb_ether *ue = task->ue;
378 ue->ue_methods->ue_setpromisc(ue);
382 ue_setmulti_task(struct usb_proc_msg *_task)
384 struct usb_ether_cfg_task *task =
385 (struct usb_ether_cfg_task *)_task;
386 struct usb_ether *ue = task->ue;
388 ue->ue_methods->ue_setmulti(ue);
392 ue_ifmedia_upd(struct ifnet *ifp)
394 struct usb_ether *ue = ifp->if_softc;
396 /* Defer to process context */
398 ue_queue_command(ue, ue_ifmedia_task,
399 &ue->ue_media_task[0].hdr,
400 &ue->ue_media_task[1].hdr);
407 ue_ifmedia_task(struct usb_proc_msg *_task)
409 struct usb_ether_cfg_task *task =
410 (struct usb_ether_cfg_task *)_task;
411 struct usb_ether *ue = task->ue;
412 struct ifnet *ifp = ue->ue_ifp;
414 ue->ue_methods->ue_mii_upd(ifp);
418 ue_watchdog(void *arg)
420 struct usb_ether *ue = arg;
421 struct ifnet *ifp = ue->ue_ifp;
423 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
426 ue_queue_command(ue, ue_tick_task,
427 &ue->ue_tick_task[0].hdr,
428 &ue->ue_tick_task[1].hdr);
430 usb_callout_reset(&ue->ue_watchdog, hz, ue_watchdog, ue);
434 ue_tick_task(struct usb_proc_msg *_task)
436 struct usb_ether_cfg_task *task =
437 (struct usb_ether_cfg_task *)_task;
438 struct usb_ether *ue = task->ue;
439 struct ifnet *ifp = ue->ue_ifp;
441 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
444 ue->ue_methods->ue_tick(ue);
448 uether_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
450 struct usb_ether *ue = ifp->if_softc;
451 struct ifreq *ifr = (struct ifreq *)data;
452 struct mii_data *mii;
458 if (ifp->if_flags & IFF_UP) {
459 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
460 ue_queue_command(ue, ue_promisc_task,
461 &ue->ue_promisc_task[0].hdr,
462 &ue->ue_promisc_task[1].hdr);
464 ue_queue_command(ue, ue_start_task,
465 &ue->ue_sync_task[0].hdr,
466 &ue->ue_sync_task[1].hdr);
468 ue_queue_command(ue, ue_stop_task,
469 &ue->ue_sync_task[0].hdr,
470 &ue->ue_sync_task[1].hdr);
477 ue_queue_command(ue, ue_setmulti_task,
478 &ue->ue_multi_task[0].hdr,
479 &ue->ue_multi_task[1].hdr);
484 if (ue->ue_miibus != NULL) {
485 mii = device_get_softc(ue->ue_miibus);
486 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
488 error = ether_ioctl(ifp, command, data);
491 error = ether_ioctl(ifp, command, data);
498 uether_modevent(module_t mod, int type, void *data)
503 ueunit = new_unrhdr(0, INT_MAX, NULL);
512 static moduledata_t uether_mod = {
523 m_new = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
526 m_new->m_len = m_new->m_pkthdr.len = MCLBYTES;
528 m_adj(m_new, ETHER_ALIGN);
533 uether_rxmbuf(struct usb_ether *ue, struct mbuf *m,
536 struct ifnet *ifp = ue->ue_ifp;
538 UE_LOCK_ASSERT(ue, MA_OWNED);
542 m->m_pkthdr.rcvif = ifp;
543 m->m_pkthdr.len = m->m_len = len;
545 /* enqueue for later when the lock can be released */
546 _IF_ENQUEUE(&ue->ue_rxq, m);
551 uether_rxbuf(struct usb_ether *ue, struct usb_page_cache *pc,
552 unsigned int offset, unsigned int len)
554 struct ifnet *ifp = ue->ue_ifp;
557 UE_LOCK_ASSERT(ue, MA_OWNED);
559 if (len < ETHER_HDR_LEN || len > MCLBYTES - ETHER_ALIGN)
568 usbd_copy_out(pc, offset, mtod(m, uint8_t *), len);
572 m->m_pkthdr.rcvif = ifp;
573 m->m_pkthdr.len = m->m_len = len;
575 /* enqueue for later when the lock can be released */
576 _IF_ENQUEUE(&ue->ue_rxq, m);
581 uether_rxflush(struct usb_ether *ue)
583 struct ifnet *ifp = ue->ue_ifp;
586 UE_LOCK_ASSERT(ue, MA_OWNED);
589 _IF_DEQUEUE(&ue->ue_rxq, m);
594 * The USB xfer has been resubmitted so its safe to unlock now.
597 ifp->if_input(ifp, m);
602 DECLARE_MODULE(uether, uether_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
603 MODULE_VERSION(uether, 1);