1 /* 2 * Copyright (c) 2002-2003 3 * Hidetoshi Shimokawa. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * 16 * This product includes software developed by Hidetoshi Shimokawa. 17 * 18 * 4. Neither the name of the author nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $FreeBSD: src/sys/dev/firewire/if_fwe.c,v 1.27 2004/01/08 14:58:09 simokawa Exp $ 35 */ 36 37 #include "opt_inet.h" 38 #include "opt_ifpoll.h" 39 40 #include <sys/param.h> 41 #include <sys/conf.h> 42 #include <sys/kernel.h> 43 #include <sys/malloc.h> 44 #include <sys/mbuf.h> 45 #include <sys/socket.h> 46 #include <sys/sockio.h> 47 #include <sys/sysctl.h> 48 #include <sys/systm.h> 49 #include <sys/module.h> 50 #include <sys/bus.h> 51 #include <sys/thread2.h> 52 53 #include <net/bpf.h> 54 #include <net/ethernet.h> 55 #include <net/if.h> 56 #include <net/if_arp.h> 57 #ifdef __DragonFly__ 58 #include <net/ifq_var.h> 59 #include <net/if_poll.h> 60 #include <net/vlan/if_vlan_var.h> 61 #include <bus/firewire/firewire.h> 62 #include <bus/firewire/firewirereg.h> 63 #include "if_fwevar.h" 64 #else 65 #include <net/if_vlan_var.h> 66 67 #include <dev/firewire/firewire.h> 68 #include <dev/firewire/firewirereg.h> 69 #include <dev/firewire/if_fwevar.h> 70 #endif 71 72 #define FWEDEBUG if (fwedebug) if_printf 73 #define TX_MAX_QUEUE (FWMAXQUEUE - 1) 74 75 /* network interface */ 76 static void fwe_start (struct ifnet *, struct ifaltq_subque *); 77 static int fwe_ioctl (struct ifnet *, u_long, caddr_t, struct ucred *); 78 static void fwe_init (void *); 79 80 static void fwe_output_callback (struct fw_xfer *); 81 static void fwe_as_output (struct fwe_softc *, struct ifnet *); 82 static void fwe_as_input (struct fw_xferq *); 83 84 static int fwedebug = 0; 85 static int stream_ch = 1; 86 static int tx_speed = 2; 87 static int rx_queue_len = FWMAXQUEUE; 88 89 MALLOC_DEFINE(M_FWE, "if_fwe", "Ethernet over FireWire interface"); 90 SYSCTL_INT(_debug, OID_AUTO, if_fwe_debug, CTLFLAG_RW, &fwedebug, 0, 91 "Enable debug output"); 92 SYSCTL_DECL(_hw_firewire); 93 SYSCTL_NODE(_hw_firewire, OID_AUTO, fwe, CTLFLAG_RD, 0, 94 "Ethernet emulation subsystem"); 95 SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, stream_ch, CTLFLAG_RW, &stream_ch, 0, 96 "Stream channel to use"); 97 SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, tx_speed, CTLFLAG_RW, &tx_speed, 0, 98 "Transmission speed"); 99 SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, rx_queue_len, CTLFLAG_RW, &rx_queue_len, 100 0, "Length of the receive queue"); 101 102 TUNABLE_INT("hw.firewire.fwe.stream_ch", &stream_ch); 103 TUNABLE_INT("hw.firewire.fwe.tx_speed", &tx_speed); 104 TUNABLE_INT("hw.firewire.fwe.rx_queue_len", &rx_queue_len); 105 106 #ifdef IFPOLL_ENABLE 107 108 static void 109 fwe_npoll_compat(struct ifnet *ifp, void *arg __unused, int count) 110 { 111 struct fwe_softc *fwe; 112 struct firewire_comm *fc; 113 int check_status = 0; 114 115 ASSERT_SERIALIZED(ifp->if_serializer); 116 117 fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe; 118 fc = fwe->fd.fc; 119 120 if (fwe->npoll.ifpc_stcount-- == 0) { 121 fwe->npoll.ifpc_stcount = fwe->npoll.ifpc_stfrac; 122 check_status = 1; 123 } 124 fc->poll(fc, check_status?0:1, count); 125 } 126 127 static void 128 fwe_npoll(struct ifnet *ifp, struct ifpoll_info *info) 129 { 130 struct fwe_softc *fwe; 131 struct firewire_comm *fc; 132 133 ASSERT_SERIALIZED(ifp->if_serializer); 134 135 fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe; 136 fc = fwe->fd.fc; 137 138 if (info != NULL) { 139 int cpuid = fwe->npoll.ifpc_cpuid; 140 141 info->ifpi_rx[cpuid].poll_func = fwe_npoll_compat; 142 info->ifpi_rx[cpuid].arg = NULL; 143 info->ifpi_rx[cpuid].serializer = ifp->if_serializer; 144 145 if (ifp->if_flags & IFF_RUNNING) { 146 /* disable interrupts */ 147 fc->set_intr(fc, 0); 148 fwe->npoll.ifpc_stcount = 0; 149 } 150 ifq_set_cpuid(&ifp->if_snd, cpuid); 151 } else { 152 if (ifp->if_flags & IFF_RUNNING) { 153 /* enable interrupts */ 154 fc->set_intr(fc, 1); 155 } 156 ifq_set_cpuid(&ifp->if_snd, 0 /* XXX */); 157 } 158 } 159 160 #endif /* IFPOLL_ENABLE */ 161 162 static int 163 fwe_probe(device_t dev) 164 { 165 device_t pa; 166 167 pa = device_get_parent(dev); 168 if(device_get_unit(dev) != device_get_unit(pa)){ 169 return(ENXIO); 170 } 171 172 device_set_desc(dev, "Ethernet over FireWire"); 173 return (0); 174 } 175 176 static int 177 fwe_attach(device_t dev) 178 { 179 struct fwe_softc *fwe; 180 struct ifnet *ifp; 181 uint8_t eaddr[ETHER_ADDR_LEN]; 182 struct fw_eui64 *eui; 183 184 fwe = ((struct fwe_softc *)device_get_softc(dev)); 185 186 /* XXX */ 187 fwe->stream_ch = stream_ch; 188 fwe->dma_ch = -1; 189 190 fwe->fd.fc = device_get_ivars(dev); 191 if (tx_speed < 0) 192 tx_speed = fwe->fd.fc->speed; 193 194 fwe->fd.dev = dev; 195 fwe->fd.post_explore = NULL; 196 fwe->eth_softc.fwe = fwe; 197 198 fwe->pkt_hdr.mode.stream.tcode = FWTCODE_STREAM; 199 fwe->pkt_hdr.mode.stream.sy = 0; 200 fwe->pkt_hdr.mode.stream.chtag = fwe->stream_ch; 201 202 /* generate fake MAC address: first and last 3bytes from eui64 */ 203 #define LOCAL (0x02) 204 #define GROUP (0x01) 205 206 eui = &fwe->fd.fc->eui; 207 eaddr[0] = (FW_EUI64_BYTE(eui, 0) | LOCAL) & ~GROUP; 208 eaddr[1] = FW_EUI64_BYTE(eui, 1); 209 eaddr[2] = FW_EUI64_BYTE(eui, 2); 210 eaddr[3] = FW_EUI64_BYTE(eui, 5); 211 eaddr[4] = FW_EUI64_BYTE(eui, 6); 212 eaddr[5] = FW_EUI64_BYTE(eui, 7); 213 214 /* fill the rest and attach interface */ 215 ifp = &fwe->fwe_if; 216 ifp->if_softc = &fwe->eth_softc; 217 218 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 219 ifp->if_init = fwe_init; 220 ifp->if_start = fwe_start; 221 ifp->if_ioctl = fwe_ioctl; 222 ifp->if_capabilities = IFCAP_VLAN_MTU; 223 #ifdef IFPOLL_ENABLE 224 ifp->if_npoll = fwe_npoll; 225 #endif 226 ifp->if_mtu = ETHERMTU; 227 ifp->if_flags = (IFF_BROADCAST|IFF_SIMPLEX|IFF_MULTICAST); 228 ifq_set_maxlen(&ifp->if_snd, TX_MAX_QUEUE); 229 ifq_set_ready(&ifp->if_snd); 230 231 ether_ifattach(ifp, eaddr, NULL); 232 233 /* Tell the upper layer(s) we support long frames. */ 234 ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header); 235 236 #ifdef IFPOLL_ENABLE 237 ifpoll_compat_setup(&fwe->npoll, NULL, NULL, device_get_unit(dev), 238 ifp->if_serializer); 239 #endif 240 241 FWEDEBUG(ifp, "interface created\n"); 242 return 0; 243 } 244 245 static void 246 fwe_stop(struct fwe_softc *fwe) 247 { 248 struct firewire_comm *fc; 249 struct fw_xferq *xferq; 250 struct ifnet *ifp = &fwe->fwe_if; 251 struct fw_xfer *xfer, *next; 252 int i; 253 254 fc = fwe->fd.fc; 255 256 ifp->if_flags &= ~IFF_RUNNING; 257 ifq_clr_oactive(&ifp->if_snd); 258 259 if (fwe->dma_ch >= 0) { 260 xferq = fc->ir[fwe->dma_ch]; 261 262 if (xferq->flag & FWXFERQ_RUNNING) 263 fc->irx_disable(fc, fwe->dma_ch); 264 xferq->flag &= 265 ~(FWXFERQ_MODEMASK | FWXFERQ_OPEN | FWXFERQ_STREAM | 266 FWXFERQ_EXTBUF | FWXFERQ_HANDLER | FWXFERQ_CHTAGMASK); 267 xferq->hand = NULL; 268 269 for (i = 0; i < xferq->bnchunk; i ++) 270 m_freem(xferq->bulkxfer[i].mbuf); 271 kfree(xferq->bulkxfer, M_FWE); 272 273 for (xfer = STAILQ_FIRST(&fwe->xferlist); xfer != NULL; 274 xfer = next) { 275 next = STAILQ_NEXT(xfer, link); 276 fw_xfer_free(xfer); 277 } 278 STAILQ_INIT(&fwe->xferlist); 279 280 xferq->bulkxfer = NULL; 281 fwe->dma_ch = -1; 282 } 283 } 284 285 static int 286 fwe_detach(device_t dev) 287 { 288 struct fwe_softc *fwe = device_get_softc(dev); 289 290 lwkt_serialize_enter(fwe->fwe_if.if_serializer); 291 fwe_stop(fwe); 292 lwkt_serialize_exit(fwe->fwe_if.if_serializer); 293 294 ether_ifdetach(&fwe->fwe_if); 295 return 0; 296 } 297 298 static void 299 fwe_init(void *arg) 300 { 301 struct fwe_softc *fwe = ((struct fwe_eth_softc *)arg)->fwe; 302 struct firewire_comm *fc; 303 struct ifnet *ifp = &fwe->fwe_if; 304 struct fw_xferq *xferq; 305 struct fw_xfer *xfer; 306 struct mbuf *m; 307 int i; 308 309 FWEDEBUG(ifp, "initializing\n"); 310 311 /* XXX keep promiscoud mode */ 312 ifp->if_flags |= IFF_PROMISC; 313 314 fc = fwe->fd.fc; 315 #define START 0 316 if (fwe->dma_ch < 0) { 317 for (i = START; i < fc->nisodma; i ++) { 318 xferq = fc->ir[i]; 319 if ((xferq->flag & FWXFERQ_OPEN) == 0) 320 goto found; 321 } 322 if_printf(ifp, "no free dma channel\n"); 323 return; 324 found: 325 fwe->dma_ch = i; 326 fwe->stream_ch = stream_ch; 327 fwe->pkt_hdr.mode.stream.chtag = fwe->stream_ch; 328 /* allocate DMA channel and init packet mode */ 329 xferq->flag |= FWXFERQ_OPEN | FWXFERQ_EXTBUF | 330 FWXFERQ_HANDLER | FWXFERQ_STREAM; 331 xferq->flag &= ~0xff; 332 xferq->flag |= fwe->stream_ch & 0xff; 333 /* register fwe_input handler */ 334 xferq->sc = (caddr_t) fwe; 335 xferq->hand = fwe_as_input; 336 xferq->bnchunk = rx_queue_len; 337 xferq->bnpacket = 1; 338 xferq->psize = MCLBYTES; 339 xferq->queued = 0; 340 xferq->buf = NULL; 341 xferq->bulkxfer = (struct fw_bulkxfer *) kmalloc( 342 sizeof(struct fw_bulkxfer) * xferq->bnchunk, 343 M_FWE, M_WAITOK); 344 STAILQ_INIT(&xferq->stvalid); 345 STAILQ_INIT(&xferq->stfree); 346 STAILQ_INIT(&xferq->stdma); 347 xferq->stproc = NULL; 348 for (i = 0; i < xferq->bnchunk; i ++) { 349 m = m_getcl(M_WAITOK, MT_DATA, M_PKTHDR); 350 xferq->bulkxfer[i].mbuf = m; 351 if (m != NULL) { 352 m->m_len = m->m_pkthdr.len = m->m_ext.ext_size; 353 STAILQ_INSERT_TAIL(&xferq->stfree, 354 &xferq->bulkxfer[i], link); 355 } else { 356 if_printf(ifp, "fwe_init: m_getcl failed\n"); 357 } 358 } 359 STAILQ_INIT(&fwe->xferlist); 360 for (i = 0; i < TX_MAX_QUEUE; i++) { 361 xfer = fw_xfer_alloc(M_FWE); 362 if (xfer == NULL) 363 break; 364 xfer->send.spd = tx_speed; 365 xfer->fc = fwe->fd.fc; 366 xfer->retry_req = fw_asybusy; 367 xfer->sc = (caddr_t)fwe; 368 xfer->act.hand = fwe_output_callback; 369 STAILQ_INSERT_TAIL(&fwe->xferlist, xfer, link); 370 } 371 } else 372 xferq = fc->ir[fwe->dma_ch]; 373 374 #ifdef IFPOLL_ENABLE 375 /* Disable interrupt, if polling(4) is enabled */ 376 if (ifp->if_flags & IFF_NPOLLING) { 377 fc->set_intr(fc, 0); 378 fwe->npoll.ifpc_stcount = 0; 379 } else 380 #endif 381 fc->set_intr(fc, 1); 382 383 /* start dma */ 384 if ((xferq->flag & FWXFERQ_RUNNING) == 0) 385 fc->irx_enable(fc, fwe->dma_ch); 386 387 ifp->if_flags |= IFF_RUNNING; 388 ifq_clr_oactive(&ifp->if_snd); 389 } 390 391 392 static int 393 fwe_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr) 394 { 395 struct fwe_softc *fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe; 396 struct ifstat *ifs = NULL; 397 int error = 0, len; 398 399 switch (cmd) { 400 case SIOCSIFFLAGS: 401 if (ifp->if_flags & IFF_UP) { 402 if (!(ifp->if_flags & IFF_RUNNING)) 403 fwe_init(&fwe->eth_softc); 404 } else { 405 if (ifp->if_flags & IFF_RUNNING) 406 fwe_stop(fwe); 407 } 408 /* XXX keep promiscoud mode */ 409 ifp->if_flags |= IFF_PROMISC; 410 break; 411 case SIOCADDMULTI: 412 case SIOCDELMULTI: 413 break; 414 415 case SIOCGIFSTATUS: 416 ifs = (struct ifstat *)data; 417 len = strlen(ifs->ascii); 418 if (len < sizeof(ifs->ascii)) 419 ksnprintf(ifs->ascii + len, 420 sizeof(ifs->ascii) - len, 421 "\tch %d dma %d\n", 422 fwe->stream_ch, fwe->dma_ch); 423 break; 424 default: 425 error = ether_ioctl(ifp, cmd, data); 426 break; 427 } 428 return (error); 429 } 430 431 static void 432 fwe_output_callback(struct fw_xfer *xfer) 433 { 434 struct fwe_softc *fwe; 435 struct ifnet *ifp; 436 437 fwe = (struct fwe_softc *)xfer->sc; 438 ifp = &fwe->fwe_if; 439 lwkt_serialize_enter(ifp->if_serializer); 440 /* XXX error check */ 441 FWEDEBUG(ifp, "resp = %d\n", xfer->resp); 442 if (xfer->resp != 0) 443 IFNET_STAT_INC(ifp, oerrors, 1); 444 445 m_freem(xfer->mbuf); 446 fw_xfer_unload(xfer); 447 448 STAILQ_INSERT_TAIL(&fwe->xferlist, xfer, link); 449 450 /* for queue full */ 451 if (!ifq_is_empty(&ifp->if_snd)) 452 if_devstart(ifp); 453 lwkt_serialize_exit(ifp->if_serializer); 454 } 455 456 static void 457 fwe_start(struct ifnet *ifp, struct ifaltq_subque *ifsq) 458 { 459 struct fwe_softc *fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe; 460 461 ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq); 462 FWEDEBUG(ifp, "starting\n"); 463 464 if (fwe->dma_ch < 0) { 465 FWEDEBUG(ifp, "not ready\n"); 466 467 ifq_purge(&ifp->if_snd); 468 } else { 469 ifq_set_oactive(&ifp->if_snd); 470 471 if (!ifq_is_empty(&ifp->if_snd)) 472 fwe_as_output(fwe, ifp); 473 474 ifq_clr_oactive(&ifp->if_snd); 475 } 476 } 477 478 #define HDR_LEN 4 479 #ifndef ETHER_ALIGN 480 #define ETHER_ALIGN 2 481 #endif 482 /* Async. stream output */ 483 static void 484 fwe_as_output(struct fwe_softc *fwe, struct ifnet *ifp) 485 { 486 struct mbuf *m; 487 struct fw_xfer *xfer; 488 struct fw_xferq *xferq; 489 struct fw_pkt *fp; 490 int i = 0; 491 492 xfer = NULL; 493 xferq = fwe->fd.fc->atq; 494 while (xferq->queued < xferq->maxq - 1) { 495 xfer = STAILQ_FIRST(&fwe->xferlist); 496 if (xfer == NULL) { 497 if_printf(ifp, "lack of xfer\n"); 498 return; 499 } 500 m = ifq_dequeue(&ifp->if_snd); 501 if (m == NULL) 502 break; 503 STAILQ_REMOVE_HEAD(&fwe->xferlist, link); 504 BPF_MTAP(ifp, m); 505 506 /* keep ip packet alignment for alpha */ 507 M_PREPEND(m, ETHER_ALIGN, M_NOWAIT); 508 fp = &xfer->send.hdr; 509 *(u_int32_t *)&xfer->send.hdr = *(int32_t *)&fwe->pkt_hdr; 510 fp->mode.stream.len = m->m_pkthdr.len; 511 xfer->mbuf = m; 512 xfer->send.pay_len = m->m_pkthdr.len; 513 514 if (fw_asyreq(fwe->fd.fc, -1, xfer) != 0) { 515 /* error */ 516 IFNET_STAT_INC(ifp, oerrors, 1); 517 /* XXX set error code */ 518 fwe_output_callback(xfer); 519 } else { 520 IFNET_STAT_INC(ifp, opackets, 1); 521 i++; 522 } 523 } 524 #if 0 525 if (i > 1) 526 if_printf(ifp, "%d queued\n", i); 527 #endif 528 if (i > 0) 529 xferq->start(fwe->fd.fc); 530 } 531 532 /* Async. stream output */ 533 static void 534 fwe_as_input(struct fw_xferq *xferq) 535 { 536 struct mbuf *m, *m0; 537 struct ifnet *ifp; 538 struct fwe_softc *fwe; 539 struct fw_bulkxfer *sxfer; 540 struct fw_pkt *fp; 541 542 fwe = (struct fwe_softc *)xferq->sc; 543 ifp = &fwe->fwe_if; 544 lwkt_serialize_enter(ifp->if_serializer); 545 while ((sxfer = STAILQ_FIRST(&xferq->stvalid)) != NULL) { 546 STAILQ_REMOVE_HEAD(&xferq->stvalid, link); 547 fp = mtod(sxfer->mbuf, struct fw_pkt *); 548 if (fwe->fd.fc->irx_post != NULL) 549 fwe->fd.fc->irx_post(fwe->fd.fc, fp->mode.ld); 550 m = sxfer->mbuf; 551 552 /* insert new rbuf */ 553 sxfer->mbuf = m0 = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 554 if (m0 != NULL) { 555 m0->m_len = m0->m_pkthdr.len = m0->m_ext.ext_size; 556 STAILQ_INSERT_TAIL(&xferq->stfree, sxfer, link); 557 } else { 558 if_printf(ifp, "fwe_as_input: m_getcl failed\n"); 559 } 560 561 if (sxfer->resp != 0 || fp->mode.stream.len < 562 ETHER_ALIGN + sizeof(struct ether_header)) { 563 m_freem(m); 564 IFNET_STAT_INC(ifp, ierrors, 1); 565 continue; 566 } 567 568 m->m_data += HDR_LEN + ETHER_ALIGN; 569 m->m_len = m->m_pkthdr.len = 570 fp->mode.stream.len - ETHER_ALIGN; 571 m->m_pkthdr.rcvif = ifp; 572 #if 0 573 FWEDEBUG(ifp, "%02x %02x %02x %02x %02x %02x\n" 574 "%02x %02x %02x %02x %02x %02x\n" 575 "%02x %02x %02x %02x\n" 576 "%02x %02x %02x %02x\n" 577 "%02x %02x %02x %02x\n" 578 "%02x %02x %02x %02x\n", 579 c[0], c[1], c[2], c[3], c[4], c[5], 580 c[6], c[7], c[8], c[9], c[10], c[11], 581 c[12], c[13], c[14], c[15], 582 c[16], c[17], c[18], c[19], 583 c[20], c[21], c[22], c[23], 584 c[20], c[21], c[22], c[23] 585 ); 586 #endif 587 ifp->if_input(ifp, m, NULL, -1); 588 IFNET_STAT_INC(ifp, ipackets, 1); 589 } 590 if (STAILQ_FIRST(&xferq->stfree) != NULL) 591 fwe->fd.fc->irx_enable(fwe->fd.fc, fwe->dma_ch); 592 lwkt_serialize_exit(ifp->if_serializer); 593 } 594 595 596 static devclass_t fwe_devclass; 597 598 /* 599 * Because fwe is a static device that always exists under any attached 600 * firewire device, and not scanned by the firewire device, we need an 601 * identify function to install the device. 602 */ 603 static device_method_t fwe_methods[] = { 604 /* device interface */ 605 DEVMETHOD(device_identify, bus_generic_identify_sameunit), 606 DEVMETHOD(device_probe, fwe_probe), 607 DEVMETHOD(device_attach, fwe_attach), 608 DEVMETHOD(device_detach, fwe_detach), 609 DEVMETHOD_END 610 }; 611 612 static driver_t fwe_driver = { 613 "fwe", 614 fwe_methods, 615 sizeof(struct fwe_softc), 616 }; 617 618 619 DECLARE_DUMMY_MODULE(fwe); 620 DRIVER_MODULE(fwe, firewire, fwe_driver, fwe_devclass, NULL, NULL); 621 MODULE_VERSION(fwe, 1); 622 MODULE_DEPEND(fwe, firewire, 1, 1, 1); 623