1 /*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 2004
5 * Doug Rabson
6 * Copyright (c) 2002-2003
7 * Hidetoshi Shimokawa. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 *
20 * This product includes software developed by Hidetoshi Shimokawa.
21 *
22 * 4. Neither the name of the author nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 */
39
40 #ifdef HAVE_KERNEL_OPTION_HEADERS
41 #include "opt_device_polling.h"
42 #include "opt_inet.h"
43 #endif
44
45 #include <sys/param.h>
46 #include <sys/kernel.h>
47 #include <sys/malloc.h>
48 #include <sys/mbuf.h>
49 #include <sys/socket.h>
50 #include <sys/sockio.h>
51 #include <sys/sysctl.h>
52 #include <sys/systm.h>
53 #include <sys/taskqueue.h>
54 #include <sys/module.h>
55 #include <sys/bus.h>
56 #include <machine/bus.h>
57
58 #include <net/bpf.h>
59 #include <net/if.h>
60 #include <net/if_var.h>
61 #include <net/firewire.h>
62 #include <net/if_arp.h>
63 #include <net/if_types.h>
64 #include <dev/firewire/firewire.h>
65 #include <dev/firewire/firewirereg.h>
66 #include <dev/firewire/iec13213.h>
67 #include <dev/firewire/if_fwipvar.h>
68
69 /*
70 * We really need a mechanism for allocating regions in the FIFO
71 * address space. We pick a address in the OHCI controller's 'middle'
72 * address space. This means that the controller will automatically
73 * send responses for us, which is fine since we don't have any
74 * important information to put in the response anyway.
75 */
76 #define INET_FIFO 0xfffe00000000LL
77
78 #define FWIPDEBUG if (fwipdebug) if_printf
79 #define TX_MAX_QUEUE (FWMAXQUEUE - 1)
80
81 /* network interface */
82 static void fwip_start (if_t);
83 static int fwip_ioctl (if_t, u_long, caddr_t);
84 static void fwip_init (void *);
85
86 static void fwip_post_busreset (void *);
87 static void fwip_output_callback (struct fw_xfer *);
88 static void fwip_async_output (struct fwip_softc *, if_t);
89 static void fwip_start_send (void *, int);
90 static void fwip_stream_input (struct fw_xferq *);
91 static void fwip_unicast_input(struct fw_xfer *);
92
93 static int fwipdebug = 0;
94 static int broadcast_channel = 0xc0 | 0x1f; /* tag | channel(XXX) */
95 static int tx_speed = 2;
96 static int rx_queue_len = FWMAXQUEUE;
97
98 static MALLOC_DEFINE(M_FWIP, "if_fwip", "IP over FireWire interface");
99 SYSCTL_INT(_debug, OID_AUTO, if_fwip_debug, CTLFLAG_RW, &fwipdebug, 0, "");
100 SYSCTL_DECL(_hw_firewire);
101 static SYSCTL_NODE(_hw_firewire, OID_AUTO, fwip, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
102 "Firewire ip subsystem");
103 SYSCTL_INT(_hw_firewire_fwip, OID_AUTO, rx_queue_len, CTLFLAG_RWTUN, &rx_queue_len,
104 0, "Length of the receive queue");
105
106 #ifdef DEVICE_POLLING
107 static poll_handler_t fwip_poll;
108
109 static int
fwip_poll(if_t ifp,enum poll_cmd cmd,int count)110 fwip_poll(if_t ifp, enum poll_cmd cmd, int count)
111 {
112 struct fwip_softc *fwip;
113 struct firewire_comm *fc;
114
115 if (!(if_getdrvflags(ifp) & IFF_DRV_RUNNING))
116 return (0);
117
118 fwip = ((struct fwip_eth_softc *)if_getsoftc(ifp))->fwip;
119 fc = fwip->fd.fc;
120 fc->poll(fc, (cmd == POLL_AND_CHECK_STATUS)?0:1, count);
121 return (0);
122 }
123 #endif /* DEVICE_POLLING */
124
125 static void
fwip_identify(driver_t * driver,device_t parent)126 fwip_identify(driver_t *driver, device_t parent)
127 {
128 BUS_ADD_CHILD(parent, 0, "fwip", device_get_unit(parent));
129 }
130
131 static int
fwip_probe(device_t dev)132 fwip_probe(device_t dev)
133 {
134 device_t pa;
135
136 pa = device_get_parent(dev);
137 if (device_get_unit(dev) != device_get_unit(pa)) {
138 return (ENXIO);
139 }
140
141 device_set_desc(dev, "IP over FireWire");
142 return (0);
143 }
144
145 static int
fwip_attach(device_t dev)146 fwip_attach(device_t dev)
147 {
148 struct fwip_softc *fwip;
149 if_t ifp;
150 int unit, s;
151 struct fw_hwaddr *hwaddr;
152
153 fwip = ((struct fwip_softc *)device_get_softc(dev));
154 unit = device_get_unit(dev);
155 ifp = fwip->fw_softc.fwip_ifp = if_alloc(IFT_IEEE1394);
156
157 mtx_init(&fwip->mtx, "fwip", NULL, MTX_DEF);
158 /* XXX */
159 fwip->dma_ch = -1;
160
161 fwip->fd.fc = device_get_ivars(dev);
162 if (tx_speed < 0)
163 tx_speed = fwip->fd.fc->speed;
164
165 fwip->fd.dev = dev;
166 fwip->fd.post_explore = NULL;
167 fwip->fd.post_busreset = fwip_post_busreset;
168 fwip->fw_softc.fwip = fwip;
169 TASK_INIT(&fwip->start_send, 0, fwip_start_send, fwip);
170
171 /*
172 * Encode our hardware the way that arp likes it.
173 */
174 hwaddr = &IFP2FWC(fwip->fw_softc.fwip_ifp)->fc_hwaddr;
175 hwaddr->sender_unique_ID_hi = htonl(fwip->fd.fc->eui.hi);
176 hwaddr->sender_unique_ID_lo = htonl(fwip->fd.fc->eui.lo);
177 hwaddr->sender_max_rec = fwip->fd.fc->maxrec;
178 hwaddr->sspd = fwip->fd.fc->speed;
179 hwaddr->sender_unicast_FIFO_hi = htons((uint16_t)(INET_FIFO >> 32));
180 hwaddr->sender_unicast_FIFO_lo = htonl((uint32_t)INET_FIFO);
181
182 /* fill the rest and attach interface */
183 if_setsoftc(ifp, &fwip->fw_softc);
184
185 if_initname(ifp, device_get_name(dev), unit);
186 if_setinitfn(ifp, fwip_init);
187 if_setstartfn(ifp, fwip_start);
188 if_setioctlfn(ifp, fwip_ioctl);
189 if_setflags(ifp, (IFF_BROADCAST|IFF_SIMPLEX|IFF_MULTICAST));
190 if_setsendqlen(ifp, TX_MAX_QUEUE);
191 #ifdef DEVICE_POLLING
192 if_setcapabilitiesbit(ifp, IFCAP_POLLING, 0);
193 #endif
194
195 s = splimp();
196 firewire_ifattach(ifp, hwaddr);
197 splx(s);
198
199 FWIPDEBUG(ifp, "interface created\n");
200 return (0);
201 }
202
203 static void
fwip_stop(struct fwip_softc * fwip)204 fwip_stop(struct fwip_softc *fwip)
205 {
206 struct firewire_comm *fc;
207 struct fw_xferq *xferq;
208 if_t ifp = fwip->fw_softc.fwip_ifp;
209 struct fw_xfer *xfer, *next;
210 int i;
211
212 fc = fwip->fd.fc;
213
214 if (fwip->dma_ch >= 0) {
215 xferq = fc->ir[fwip->dma_ch];
216
217 if (xferq->flag & FWXFERQ_RUNNING)
218 fc->irx_disable(fc, fwip->dma_ch);
219 xferq->flag &=
220 ~(FWXFERQ_MODEMASK | FWXFERQ_OPEN | FWXFERQ_STREAM |
221 FWXFERQ_EXTBUF | FWXFERQ_HANDLER | FWXFERQ_CHTAGMASK);
222 xferq->hand = NULL;
223
224 for (i = 0; i < xferq->bnchunk; i++)
225 m_freem(xferq->bulkxfer[i].mbuf);
226 free(xferq->bulkxfer, M_FWIP);
227
228 fw_bindremove(fc, &fwip->fwb);
229 for (xfer = STAILQ_FIRST(&fwip->fwb.xferlist); xfer != NULL;
230 xfer = next) {
231 next = STAILQ_NEXT(xfer, link);
232 fw_xfer_free(xfer);
233 }
234
235 for (xfer = STAILQ_FIRST(&fwip->xferlist); xfer != NULL;
236 xfer = next) {
237 next = STAILQ_NEXT(xfer, link);
238 fw_xfer_free(xfer);
239 }
240 STAILQ_INIT(&fwip->xferlist);
241
242 xferq->bulkxfer = NULL;
243 fwip->dma_ch = -1;
244 }
245
246 if_setdrvflagbits(ifp, 0, (IFF_DRV_RUNNING | IFF_DRV_OACTIVE));
247 }
248
249 static int
fwip_detach(device_t dev)250 fwip_detach(device_t dev)
251 {
252 struct fwip_softc *fwip;
253 if_t ifp;
254 int s;
255
256 fwip = (struct fwip_softc *)device_get_softc(dev);
257 ifp = fwip->fw_softc.fwip_ifp;
258
259 #ifdef DEVICE_POLLING
260 if (if_getcapenable(ifp) & IFCAP_POLLING)
261 ether_poll_deregister(ifp);
262 #endif
263
264 s = splimp();
265
266 fwip_stop(fwip);
267 firewire_ifdetach(ifp);
268 if_free(ifp);
269 mtx_destroy(&fwip->mtx);
270
271 splx(s);
272 return 0;
273 }
274
275 static void
fwip_init(void * arg)276 fwip_init(void *arg)
277 {
278 struct fwip_softc *fwip = ((struct fwip_eth_softc *)arg)->fwip;
279 struct firewire_comm *fc;
280 if_t ifp = fwip->fw_softc.fwip_ifp;
281 struct fw_xferq *xferq;
282 struct fw_xfer *xfer;
283 struct mbuf *m;
284 int i;
285
286 FWIPDEBUG(ifp, "initializing\n");
287
288 fc = fwip->fd.fc;
289 #define START 0
290 if (fwip->dma_ch < 0) {
291 fwip->dma_ch = fw_open_isodma(fc, /* tx */0);
292 if (fwip->dma_ch < 0)
293 return;
294 xferq = fc->ir[fwip->dma_ch];
295 xferq->flag |= FWXFERQ_EXTBUF |
296 FWXFERQ_HANDLER | FWXFERQ_STREAM;
297 xferq->flag &= ~0xff;
298 xferq->flag |= broadcast_channel & 0xff;
299 /* register fwip_input handler */
300 xferq->sc = (caddr_t) fwip;
301 xferq->hand = fwip_stream_input;
302 xferq->bnchunk = rx_queue_len;
303 xferq->bnpacket = 1;
304 xferq->psize = MCLBYTES;
305 xferq->queued = 0;
306 xferq->buf = NULL;
307 xferq->bulkxfer = malloc(
308 sizeof(struct fw_bulkxfer) * xferq->bnchunk,
309 M_FWIP, M_WAITOK);
310 STAILQ_INIT(&xferq->stvalid);
311 STAILQ_INIT(&xferq->stfree);
312 STAILQ_INIT(&xferq->stdma);
313 xferq->stproc = NULL;
314 for (i = 0; i < xferq->bnchunk; i++) {
315 m = m_getcl(M_WAITOK, MT_DATA, M_PKTHDR);
316 xferq->bulkxfer[i].mbuf = m;
317 m->m_len = m->m_pkthdr.len = m->m_ext.ext_size;
318 STAILQ_INSERT_TAIL(&xferq->stfree,
319 &xferq->bulkxfer[i], link);
320 }
321
322 fwip->fwb.start = INET_FIFO;
323 fwip->fwb.end = INET_FIFO + 16384; /* S3200 packet size */
324
325 /* pre-allocate xfer */
326 STAILQ_INIT(&fwip->fwb.xferlist);
327 for (i = 0; i < rx_queue_len; i++) {
328 xfer = fw_xfer_alloc(M_FWIP);
329 if (xfer == NULL)
330 break;
331 m = m_getcl(M_WAITOK, MT_DATA, M_PKTHDR);
332 xfer->recv.payload = mtod(m, uint32_t *);
333 xfer->recv.pay_len = MCLBYTES;
334 xfer->hand = fwip_unicast_input;
335 xfer->fc = fc;
336 xfer->sc = (caddr_t)fwip;
337 xfer->mbuf = m;
338 STAILQ_INSERT_TAIL(&fwip->fwb.xferlist, xfer, link);
339 }
340 fw_bindadd(fc, &fwip->fwb);
341
342 STAILQ_INIT(&fwip->xferlist);
343 for (i = 0; i < TX_MAX_QUEUE; i++) {
344 xfer = fw_xfer_alloc(M_FWIP);
345 if (xfer == NULL)
346 break;
347 xfer->send.spd = tx_speed;
348 xfer->fc = fwip->fd.fc;
349 xfer->sc = (caddr_t)fwip;
350 xfer->hand = fwip_output_callback;
351 STAILQ_INSERT_TAIL(&fwip->xferlist, xfer, link);
352 }
353 } else
354 xferq = fc->ir[fwip->dma_ch];
355
356 fwip->last_dest.hi = 0;
357 fwip->last_dest.lo = 0;
358
359 /* start dma */
360 if ((xferq->flag & FWXFERQ_RUNNING) == 0)
361 fc->irx_enable(fc, fwip->dma_ch);
362
363 if_setdrvflagbits(ifp, IFF_DRV_RUNNING, 0);
364 if_setdrvflagbits(ifp, 0, IFF_DRV_OACTIVE);
365
366 #if 0
367 /* attempt to start output */
368 fwip_start(ifp);
369 #endif
370 }
371
372 static int
fwip_ioctl(if_t ifp,u_long cmd,caddr_t data)373 fwip_ioctl(if_t ifp, u_long cmd, caddr_t data)
374 {
375 struct fwip_softc *fwip = ((struct fwip_eth_softc *)if_getsoftc(ifp))->fwip;
376 int s, error;
377
378 switch (cmd) {
379 case SIOCSIFFLAGS:
380 s = splimp();
381 if (if_getflags(ifp) & IFF_UP) {
382 if (!(if_getdrvflags(ifp) & IFF_DRV_RUNNING))
383 fwip_init(&fwip->fw_softc);
384 } else {
385 if (if_getdrvflags(ifp) & IFF_DRV_RUNNING)
386 fwip_stop(fwip);
387 }
388 splx(s);
389 break;
390 case SIOCADDMULTI:
391 case SIOCDELMULTI:
392 break;
393 case SIOCSIFCAP:
394 #ifdef DEVICE_POLLING
395 {
396 struct ifreq *ifr = (struct ifreq *) data;
397 struct firewire_comm *fc = fwip->fd.fc;
398
399 if (ifr->ifr_reqcap & IFCAP_POLLING &&
400 !(if_getcapenable(ifp) & IFCAP_POLLING)) {
401 error = ether_poll_register(fwip_poll, ifp);
402 if (error)
403 return (error);
404 /* Disable interrupts */
405 fc->set_intr(fc, 0);
406 if_setcapenablebit(ifp, IFCAP_POLLING, 0);
407 return (error);
408 }
409 if (!(ifr->ifr_reqcap & IFCAP_POLLING) &&
410 if_getcapenable(ifp) & IFCAP_POLLING) {
411 error = ether_poll_deregister(ifp);
412 /* Enable interrupts. */
413 fc->set_intr(fc, 1);
414 if_setcapenablebit(ifp, 0, IFCAP_POLLING);
415 return (error);
416 }
417 }
418 #endif /* DEVICE_POLLING */
419 break;
420 default:
421 s = splimp();
422 error = firewire_ioctl(ifp, cmd, data);
423 splx(s);
424 return (error);
425 }
426
427 return (0);
428 }
429
430 static void
fwip_post_busreset(void * arg)431 fwip_post_busreset(void *arg)
432 {
433 struct fwip_softc *fwip = arg;
434 struct crom_src *src;
435 struct crom_chunk *root;
436
437 src = fwip->fd.fc->crom_src;
438 root = fwip->fd.fc->crom_root;
439
440 /* RFC2734 IPv4 over IEEE1394 */
441 bzero(&fwip->unit4, sizeof(struct crom_chunk));
442 crom_add_chunk(src, root, &fwip->unit4, CROM_UDIR);
443 crom_add_entry(&fwip->unit4, CSRKEY_SPEC, CSRVAL_IETF);
444 crom_add_simple_text(src, &fwip->unit4, &fwip->spec4, "IANA");
445 crom_add_entry(&fwip->unit4, CSRKEY_VER, 1);
446 crom_add_simple_text(src, &fwip->unit4, &fwip->ver4, "IPv4");
447
448 /* RFC3146 IPv6 over IEEE1394 */
449 bzero(&fwip->unit6, sizeof(struct crom_chunk));
450 crom_add_chunk(src, root, &fwip->unit6, CROM_UDIR);
451 crom_add_entry(&fwip->unit6, CSRKEY_SPEC, CSRVAL_IETF);
452 crom_add_simple_text(src, &fwip->unit6, &fwip->spec6, "IANA");
453 crom_add_entry(&fwip->unit6, CSRKEY_VER, 2);
454 crom_add_simple_text(src, &fwip->unit6, &fwip->ver6, "IPv6");
455
456 fwip->last_dest.hi = 0;
457 fwip->last_dest.lo = 0;
458 firewire_busreset(fwip->fw_softc.fwip_ifp);
459 }
460
461 static void
fwip_output_callback(struct fw_xfer * xfer)462 fwip_output_callback(struct fw_xfer *xfer)
463 {
464 struct fwip_softc *fwip;
465 if_t ifp;
466 int s;
467
468 fwip = (struct fwip_softc *)xfer->sc;
469 ifp = fwip->fw_softc.fwip_ifp;
470 /* XXX error check */
471 FWIPDEBUG(ifp, "resp = %d\n", xfer->resp);
472 if (xfer->resp != 0)
473 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
474 m_freem(xfer->mbuf);
475 fw_xfer_unload(xfer);
476
477 s = splimp();
478 FWIP_LOCK(fwip);
479 STAILQ_INSERT_TAIL(&fwip->xferlist, xfer, link);
480 FWIP_UNLOCK(fwip);
481 splx(s);
482
483 /* for queue full */
484 if (!if_sendq_empty(ifp)) {
485 fwip_start(ifp);
486 }
487 }
488
489 static void
fwip_start(if_t ifp)490 fwip_start(if_t ifp)
491 {
492 struct fwip_softc *fwip = ((struct fwip_eth_softc *)if_getsoftc(ifp))->fwip;
493 int s;
494
495 FWIPDEBUG(ifp, "starting\n");
496
497 if (fwip->dma_ch < 0) {
498 struct mbuf *m = NULL;
499
500 FWIPDEBUG(ifp, "not ready\n");
501
502 s = splimp();
503 do {
504 m = if_dequeue(ifp);
505 if (m != NULL)
506 m_freem(m);
507 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
508 } while (m != NULL);
509 splx(s);
510
511 return;
512 }
513
514 s = splimp();
515 if_setdrvflagbits(ifp, IFF_DRV_OACTIVE, 0);
516
517 if (!if_sendq_empty(ifp))
518 fwip_async_output(fwip, ifp);
519
520 if_setdrvflagbits(ifp, 0, IFF_DRV_OACTIVE);
521 splx(s);
522 }
523
524 /* Async. stream output */
525 static void
fwip_async_output(struct fwip_softc * fwip,if_t ifp)526 fwip_async_output(struct fwip_softc *fwip, if_t ifp)
527 {
528 struct firewire_comm *fc = fwip->fd.fc;
529 struct mbuf *m;
530 struct m_tag *mtag;
531 struct fw_hwaddr *destfw;
532 struct fw_xfer *xfer;
533 struct fw_xferq *xferq;
534 struct fw_pkt *fp;
535 uint16_t nodeid;
536 int error;
537 int i = 0;
538
539 xfer = NULL;
540 xferq = fc->atq;
541 while ((xferq->queued < xferq->maxq - 1) &&
542 !if_sendq_empty(ifp)) {
543 FWIP_LOCK(fwip);
544 xfer = STAILQ_FIRST(&fwip->xferlist);
545 if (xfer == NULL) {
546 FWIP_UNLOCK(fwip);
547 #if 0
548 printf("if_fwip: lack of xfer\n");
549 #endif
550 break;
551 }
552 STAILQ_REMOVE_HEAD(&fwip->xferlist, link);
553 FWIP_UNLOCK(fwip);
554
555 m = if_dequeue(ifp);
556 if (m == NULL) {
557 FWIP_LOCK(fwip);
558 STAILQ_INSERT_HEAD(&fwip->xferlist, xfer, link);
559 FWIP_UNLOCK(fwip);
560 break;
561 }
562
563 /*
564 * Dig out the link-level address which
565 * firewire_output got via arp or neighbour
566 * discovery. If we don't have a link-level address,
567 * just stick the thing on the broadcast channel.
568 */
569 mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR, 0);
570 if (mtag == NULL)
571 destfw = NULL;
572 else
573 destfw = (struct fw_hwaddr *) (mtag + 1);
574
575
576 /*
577 * We don't do any bpf stuff here - the generic code
578 * in firewire_output gives the packet to bpf before
579 * it adds the link-level encapsulation.
580 */
581
582 /*
583 * Put the mbuf in the xfer early in case we hit an
584 * error case below - fwip_output_callback will free
585 * the mbuf.
586 */
587 xfer->mbuf = m;
588
589 /*
590 * We use the arp result (if any) to add a suitable firewire
591 * packet header before handing off to the bus.
592 */
593 fp = &xfer->send.hdr;
594 nodeid = FWLOCALBUS | fc->nodeid;
595 if ((m->m_flags & M_BCAST) || !destfw) {
596 /*
597 * Broadcast packets are sent as GASP packets with
598 * specifier ID 0x00005e, version 1 on the broadcast
599 * channel. To be conservative, we send at the
600 * slowest possible speed.
601 */
602 uint32_t *p;
603
604 M_PREPEND(m, 2*sizeof(uint32_t), M_NOWAIT);
605 p = mtod(m, uint32_t *);
606 fp->mode.stream.len = m->m_pkthdr.len;
607 fp->mode.stream.chtag = broadcast_channel;
608 fp->mode.stream.tcode = FWTCODE_STREAM;
609 fp->mode.stream.sy = 0;
610 xfer->send.spd = 0;
611 p[0] = htonl(nodeid << 16);
612 p[1] = htonl((0x5e << 24) | 1);
613 } else {
614 /*
615 * Unicast packets are sent as block writes to the
616 * target's unicast fifo address. If we can't
617 * find the node address, we just give up. We
618 * could broadcast it but that might overflow
619 * the packet size limitations due to the
620 * extra GASP header. Note: the hardware
621 * address is stored in network byte order to
622 * make life easier for ARP.
623 */
624 struct fw_device *fd;
625 struct fw_eui64 eui;
626
627 eui.hi = ntohl(destfw->sender_unique_ID_hi);
628 eui.lo = ntohl(destfw->sender_unique_ID_lo);
629 if (fwip->last_dest.hi != eui.hi ||
630 fwip->last_dest.lo != eui.lo) {
631 fd = fw_noderesolve_eui64(fc, &eui);
632 if (!fd) {
633 /* error */
634 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
635 /* XXX set error code */
636 fwip_output_callback(xfer);
637 continue;
638
639 }
640 fwip->last_hdr.mode.wreqb.dst = FWLOCALBUS | fd->dst;
641 fwip->last_hdr.mode.wreqb.tlrt = 0;
642 fwip->last_hdr.mode.wreqb.tcode = FWTCODE_WREQB;
643 fwip->last_hdr.mode.wreqb.pri = 0;
644 fwip->last_hdr.mode.wreqb.src = nodeid;
645 fwip->last_hdr.mode.wreqb.dest_hi =
646 ntohs(destfw->sender_unicast_FIFO_hi);
647 fwip->last_hdr.mode.wreqb.dest_lo =
648 ntohl(destfw->sender_unicast_FIFO_lo);
649 fwip->last_hdr.mode.wreqb.extcode = 0;
650 fwip->last_dest = eui;
651 }
652
653 fp->mode.wreqb = fwip->last_hdr.mode.wreqb;
654 fp->mode.wreqb.len = m->m_pkthdr.len;
655 xfer->send.spd = min(destfw->sspd, fc->speed);
656 }
657
658 xfer->send.pay_len = m->m_pkthdr.len;
659
660 error = fw_asyreq(fc, -1, xfer);
661 if (error == EAGAIN) {
662 /*
663 * We ran out of tlabels - requeue the packet
664 * for later transmission.
665 */
666 xfer->mbuf = 0;
667 FWIP_LOCK(fwip);
668 STAILQ_INSERT_TAIL(&fwip->xferlist, xfer, link);
669 FWIP_UNLOCK(fwip);
670 if_sendq_prepend(ifp, m);
671 break;
672 }
673 if (error) {
674 /* error */
675 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
676 /* XXX set error code */
677 fwip_output_callback(xfer);
678 continue;
679 } else {
680 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
681 i++;
682 }
683 }
684 #if 0
685 if (i > 1)
686 printf("%d queued\n", i);
687 #endif
688 if (i > 0)
689 xferq->start(fc);
690 }
691
692 static void
fwip_start_send(void * arg,int count)693 fwip_start_send (void *arg, int count)
694 {
695 struct fwip_softc *fwip = arg;
696
697 fwip->fd.fc->atq->start(fwip->fd.fc);
698 }
699
700 /* Async. stream output */
701 static void
fwip_stream_input(struct fw_xferq * xferq)702 fwip_stream_input(struct fw_xferq *xferq)
703 {
704 struct epoch_tracker et;
705 struct mbuf *m, *m0;
706 struct m_tag *mtag;
707 if_t ifp;
708 struct fwip_softc *fwip;
709 struct fw_bulkxfer *sxfer;
710 struct fw_pkt *fp;
711 uint16_t src;
712 uint32_t *p;
713
714 fwip = (struct fwip_softc *)xferq->sc;
715 ifp = fwip->fw_softc.fwip_ifp;
716
717 NET_EPOCH_ENTER(et);
718 while ((sxfer = STAILQ_FIRST(&xferq->stvalid)) != NULL) {
719 STAILQ_REMOVE_HEAD(&xferq->stvalid, link);
720 fp = mtod(sxfer->mbuf, struct fw_pkt *);
721 if (fwip->fd.fc->irx_post != NULL)
722 fwip->fd.fc->irx_post(fwip->fd.fc, fp->mode.ld);
723 m = sxfer->mbuf;
724
725 /* insert new rbuf */
726 sxfer->mbuf = m0 = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
727 if (m0 != NULL) {
728 m0->m_len = m0->m_pkthdr.len = m0->m_ext.ext_size;
729 STAILQ_INSERT_TAIL(&xferq->stfree, sxfer, link);
730 } else
731 printf("fwip_as_input: m_getcl failed\n");
732
733 /*
734 * We must have a GASP header - leave the
735 * encapsulation sanity checks to the generic
736 * code. Remember that we also have the firewire async
737 * stream header even though that isn't accounted for
738 * in mode.stream.len.
739 */
740 if (sxfer->resp != 0 || fp->mode.stream.len <
741 2*sizeof(uint32_t)) {
742 m_freem(m);
743 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
744 continue;
745 }
746 m->m_len = m->m_pkthdr.len = fp->mode.stream.len
747 + sizeof(fp->mode.stream);
748
749 /*
750 * If we received the packet on the broadcast channel,
751 * mark it as broadcast, otherwise we assume it must
752 * be multicast.
753 */
754 if (fp->mode.stream.chtag == broadcast_channel)
755 m->m_flags |= M_BCAST;
756 else
757 m->m_flags |= M_MCAST;
758
759 /*
760 * Make sure we recognise the GASP specifier and
761 * version.
762 */
763 p = mtod(m, uint32_t *);
764 if ((((ntohl(p[1]) & 0xffff) << 8) | ntohl(p[2]) >> 24) != 0x00005e
765 || (ntohl(p[2]) & 0xffffff) != 1) {
766 FWIPDEBUG(ifp, "Unrecognised GASP header %#08x %#08x\n",
767 ntohl(p[1]), ntohl(p[2]));
768 m_freem(m);
769 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
770 continue;
771 }
772
773 /*
774 * Record the sender ID for possible BPF usage.
775 */
776 src = ntohl(p[1]) >> 16;
777 if (bpf_peers_present_if(ifp)) {
778 mtag = m_tag_alloc(MTAG_FIREWIRE,
779 MTAG_FIREWIRE_SENDER_EUID,
780 2*sizeof(uint32_t), M_NOWAIT);
781 if (mtag) {
782 /* bpf wants it in network byte order */
783 struct fw_device *fd;
784 uint32_t *p = (uint32_t *) (mtag + 1);
785 fd = fw_noderesolve_nodeid(fwip->fd.fc,
786 src & 0x3f);
787 if (fd) {
788 p[0] = htonl(fd->eui.hi);
789 p[1] = htonl(fd->eui.lo);
790 } else {
791 p[0] = 0;
792 p[1] = 0;
793 }
794 m_tag_prepend(m, mtag);
795 }
796 }
797
798 /*
799 * Trim off the GASP header
800 */
801 m_adj(m, 3*sizeof(uint32_t));
802 m->m_pkthdr.rcvif = ifp;
803 firewire_input(ifp, m, src);
804 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
805 }
806 NET_EPOCH_EXIT(et);
807 if (STAILQ_FIRST(&xferq->stfree) != NULL)
808 fwip->fd.fc->irx_enable(fwip->fd.fc, fwip->dma_ch);
809 }
810
811 static __inline void
fwip_unicast_input_recycle(struct fwip_softc * fwip,struct fw_xfer * xfer)812 fwip_unicast_input_recycle(struct fwip_softc *fwip, struct fw_xfer *xfer)
813 {
814 struct mbuf *m;
815
816 /*
817 * We have finished with a unicast xfer. Allocate a new
818 * cluster and stick it on the back of the input queue.
819 */
820 m = m_getcl(M_WAITOK, MT_DATA, M_PKTHDR);
821 xfer->mbuf = m;
822 xfer->recv.payload = mtod(m, uint32_t *);
823 xfer->recv.pay_len = MCLBYTES;
824 xfer->mbuf = m;
825 STAILQ_INSERT_TAIL(&fwip->fwb.xferlist, xfer, link);
826 }
827
828 static void
fwip_unicast_input(struct fw_xfer * xfer)829 fwip_unicast_input(struct fw_xfer *xfer)
830 {
831 uint64_t address;
832 struct mbuf *m;
833 struct m_tag *mtag;
834 struct epoch_tracker et;
835 if_t ifp;
836 struct fwip_softc *fwip;
837 struct fw_pkt *fp;
838 //struct fw_pkt *sfp;
839 int rtcode;
840
841 fwip = (struct fwip_softc *)xfer->sc;
842 ifp = fwip->fw_softc.fwip_ifp;
843 m = xfer->mbuf;
844 xfer->mbuf = 0;
845 fp = &xfer->recv.hdr;
846
847 /*
848 * Check the fifo address - we only accept addresses of
849 * exactly INET_FIFO.
850 */
851 address = ((uint64_t)fp->mode.wreqb.dest_hi << 32)
852 | fp->mode.wreqb.dest_lo;
853 if (fp->mode.wreqb.tcode != FWTCODE_WREQB) {
854 rtcode = FWRCODE_ER_TYPE;
855 } else if (address != INET_FIFO) {
856 rtcode = FWRCODE_ER_ADDR;
857 } else {
858 rtcode = FWRCODE_COMPLETE;
859 }
860 NET_EPOCH_ENTER(et);
861
862 /*
863 * Pick up a new mbuf and stick it on the back of the receive
864 * queue.
865 */
866 fwip_unicast_input_recycle(fwip, xfer);
867
868 /*
869 * If we've already rejected the packet, give up now.
870 */
871 if (rtcode != FWRCODE_COMPLETE) {
872 m_freem(m);
873 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
874 goto done;
875 }
876
877 if (bpf_peers_present_if(ifp)) {
878 /*
879 * Record the sender ID for possible BPF usage.
880 */
881 mtag = m_tag_alloc(MTAG_FIREWIRE, MTAG_FIREWIRE_SENDER_EUID,
882 2*sizeof(uint32_t), M_NOWAIT);
883 if (mtag) {
884 /* bpf wants it in network byte order */
885 struct fw_device *fd;
886 uint32_t *p = (uint32_t *) (mtag + 1);
887 fd = fw_noderesolve_nodeid(fwip->fd.fc,
888 fp->mode.wreqb.src & 0x3f);
889 if (fd) {
890 p[0] = htonl(fd->eui.hi);
891 p[1] = htonl(fd->eui.lo);
892 } else {
893 p[0] = 0;
894 p[1] = 0;
895 }
896 m_tag_prepend(m, mtag);
897 }
898 }
899
900 /*
901 * Hand off to the generic encapsulation code. We don't use
902 * ifp->if_input so that we can pass the source nodeid as an
903 * argument to facilitate link-level fragment reassembly.
904 */
905 m->m_len = m->m_pkthdr.len = fp->mode.wreqb.len;
906 m->m_pkthdr.rcvif = ifp;
907 firewire_input(ifp, m, fp->mode.wreqb.src);
908 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
909 done:
910 NET_EPOCH_EXIT(et);
911 }
912
913 static device_method_t fwip_methods[] = {
914 /* device interface */
915 DEVMETHOD(device_identify, fwip_identify),
916 DEVMETHOD(device_probe, fwip_probe),
917 DEVMETHOD(device_attach, fwip_attach),
918 DEVMETHOD(device_detach, fwip_detach),
919 { 0, 0 }
920 };
921
922 static driver_t fwip_driver = {
923 "fwip",
924 fwip_methods,
925 sizeof(struct fwip_softc),
926 };
927
928
929 DRIVER_MODULE(fwip, firewire, fwip_driver, 0, 0);
930 MODULE_VERSION(fwip, 1);
931 MODULE_DEPEND(fwip, firewire, 1, 1, 1);
932