Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/dev/firewire/if_fwip.c
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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 * $FreeBSD$ 39 */ 40 41 #ifdef HAVE_KERNEL_OPTION_HEADERS 42 #include "opt_device_polling.h" 43 #include "opt_inet.h" 44 #endif 45 46 #include <sys/param.h> 47 #include <sys/kernel.h> 48 #include <sys/malloc.h> 49 #include <sys/mbuf.h> 50 #include <sys/socket.h> 51 #include <sys/sockio.h> 52 #include <sys/sysctl.h> 53 #include <sys/systm.h> 54 #include <sys/taskqueue.h> 55 #include <sys/module.h> 56 #include <sys/bus.h> 57 #include <machine/bus.h> 58 59 #include <net/bpf.h> 60 #include <net/if.h> 61 #include <net/if_var.h> 62 #include <net/firewire.h> 63 #include <net/if_arp.h> 64 #include <net/if_types.h> 65 #include <dev/firewire/firewire.h> 66 #include <dev/firewire/firewirereg.h> 67 #include <dev/firewire/iec13213.h> 68 #include <dev/firewire/if_fwipvar.h> 69 70 /* 71 * We really need a mechanism for allocating regions in the FIFO 72 * address space. We pick a address in the OHCI controller's 'middle' 73 * address space. This means that the controller will automatically 74 * send responses for us, which is fine since we don't have any 75 * important information to put in the response anyway. 76 */ 77 #define INET_FIFO 0xfffe00000000LL 78 79 #define FWIPDEBUG if (fwipdebug) if_printf 80 #define TX_MAX_QUEUE (FWMAXQUEUE - 1) 81 82 /* network interface */ 83 static void fwip_start (struct ifnet *); 84 static int fwip_ioctl (struct ifnet *, u_long, caddr_t); 85 static void fwip_init (void *); 86 87 static void fwip_post_busreset (void *); 88 static void fwip_output_callback (struct fw_xfer *); 89 static void fwip_async_output (struct fwip_softc *, struct ifnet *); 90 static void fwip_start_send (void *, int); 91 static void fwip_stream_input (struct fw_xferq *); 92 static void fwip_unicast_input(struct fw_xfer *); 93 94 static int fwipdebug = 0; 95 static int broadcast_channel = 0xc0 | 0x1f; /* tag | channel(XXX) */ 96 static int tx_speed = 2; 97 static int rx_queue_len = FWMAXQUEUE; 98 99 static MALLOC_DEFINE(M_FWIP, "if_fwip", "IP over FireWire interface"); 100 SYSCTL_INT(_debug, OID_AUTO, if_fwip_debug, CTLFLAG_RW, &fwipdebug, 0, ""); 101 SYSCTL_DECL(_hw_firewire); 102 static SYSCTL_NODE(_hw_firewire, OID_AUTO, fwip, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 103 "Firewire ip subsystem"); 104 SYSCTL_INT(_hw_firewire_fwip, OID_AUTO, rx_queue_len, CTLFLAG_RWTUN, &rx_queue_len, 105 0, "Length of the receive queue"); 106 107 #ifdef DEVICE_POLLING 108 static poll_handler_t fwip_poll; 109 110 static int 111 fwip_poll(struct ifnet *ifp, enum poll_cmd cmd, int count) 112 { 113 struct fwip_softc *fwip; 114 struct firewire_comm *fc; 115 116 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) 117 return (0); 118 119 fwip = ((struct fwip_eth_softc *)ifp->if_softc)->fwip; 120 fc = fwip->fd.fc; 121 fc->poll(fc, (cmd == POLL_AND_CHECK_STATUS)?0:1, count); 122 return (0); 123 } 124 #endif /* DEVICE_POLLING */ 125 126 static void 127 fwip_identify(driver_t *driver, device_t parent) 128 { 129 BUS_ADD_CHILD(parent, 0, "fwip", device_get_unit(parent)); 130 } 131 132 static int 133 fwip_probe(device_t dev) 134 { 135 device_t pa; 136 137 pa = device_get_parent(dev); 138 if (device_get_unit(dev) != device_get_unit(pa)) { 139 return (ENXIO); 140 } 141 142 device_set_desc(dev, "IP over FireWire"); 143 return (0); 144 } 145 146 static int 147 fwip_attach(device_t dev) 148 { 149 struct fwip_softc *fwip; 150 struct ifnet *ifp; 151 int unit, s; 152 struct fw_hwaddr *hwaddr; 153 154 fwip = ((struct fwip_softc *)device_get_softc(dev)); 155 unit = device_get_unit(dev); 156 ifp = fwip->fw_softc.fwip_ifp = if_alloc(IFT_IEEE1394); 157 if (ifp == NULL) 158 return (ENOSPC); 159 160 mtx_init(&fwip->mtx, "fwip", NULL, MTX_DEF); 161 /* XXX */ 162 fwip->dma_ch = -1; 163 164 fwip->fd.fc = device_get_ivars(dev); 165 if (tx_speed < 0) 166 tx_speed = fwip->fd.fc->speed; 167 168 fwip->fd.dev = dev; 169 fwip->fd.post_explore = NULL; 170 fwip->fd.post_busreset = fwip_post_busreset; 171 fwip->fw_softc.fwip = fwip; 172 TASK_INIT(&fwip->start_send, 0, fwip_start_send, fwip); 173 174 /* 175 * Encode our hardware the way that arp likes it. 176 */ 177 hwaddr = &IFP2FWC(fwip->fw_softc.fwip_ifp)->fc_hwaddr; 178 hwaddr->sender_unique_ID_hi = htonl(fwip->fd.fc->eui.hi); 179 hwaddr->sender_unique_ID_lo = htonl(fwip->fd.fc->eui.lo); 180 hwaddr->sender_max_rec = fwip->fd.fc->maxrec; 181 hwaddr->sspd = fwip->fd.fc->speed; 182 hwaddr->sender_unicast_FIFO_hi = htons((uint16_t)(INET_FIFO >> 32)); 183 hwaddr->sender_unicast_FIFO_lo = htonl((uint32_t)INET_FIFO); 184 185 /* fill the rest and attach interface */ 186 ifp->if_softc = &fwip->fw_softc; 187 188 if_initname(ifp, device_get_name(dev), unit); 189 ifp->if_init = fwip_init; 190 ifp->if_start = fwip_start; 191 ifp->if_ioctl = fwip_ioctl; 192 ifp->if_flags = (IFF_BROADCAST|IFF_SIMPLEX|IFF_MULTICAST); 193 ifp->if_snd.ifq_maxlen = TX_MAX_QUEUE; 194 #ifdef DEVICE_POLLING 195 ifp->if_capabilities |= IFCAP_POLLING; 196 #endif 197 198 s = splimp(); 199 firewire_ifattach(ifp, hwaddr); 200 splx(s); 201 202 FWIPDEBUG(ifp, "interface created\n"); 203 return 0; 204 } 205 206 static void 207 fwip_stop(struct fwip_softc *fwip) 208 { 209 struct firewire_comm *fc; 210 struct fw_xferq *xferq; 211 struct ifnet *ifp = fwip->fw_softc.fwip_ifp; 212 struct fw_xfer *xfer, *next; 213 int i; 214 215 fc = fwip->fd.fc; 216 217 if (fwip->dma_ch >= 0) { 218 xferq = fc->ir[fwip->dma_ch]; 219 220 if (xferq->flag & FWXFERQ_RUNNING) 221 fc->irx_disable(fc, fwip->dma_ch); 222 xferq->flag &= 223 ~(FWXFERQ_MODEMASK | FWXFERQ_OPEN | FWXFERQ_STREAM | 224 FWXFERQ_EXTBUF | FWXFERQ_HANDLER | FWXFERQ_CHTAGMASK); 225 xferq->hand = NULL; 226 227 for (i = 0; i < xferq->bnchunk; i++) 228 m_freem(xferq->bulkxfer[i].mbuf); 229 free(xferq->bulkxfer, M_FWIP); 230 231 fw_bindremove(fc, &fwip->fwb); 232 for (xfer = STAILQ_FIRST(&fwip->fwb.xferlist); xfer != NULL; 233 xfer = next) { 234 next = STAILQ_NEXT(xfer, link); 235 fw_xfer_free(xfer); 236 } 237 238 for (xfer = STAILQ_FIRST(&fwip->xferlist); xfer != NULL; 239 xfer = next) { 240 next = STAILQ_NEXT(xfer, link); 241 fw_xfer_free(xfer); 242 } 243 STAILQ_INIT(&fwip->xferlist); 244 245 xferq->bulkxfer = NULL; 246 fwip->dma_ch = -1; 247 } 248 249 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 250 } 251 252 static int 253 fwip_detach(device_t dev) 254 { 255 struct fwip_softc *fwip; 256 struct ifnet *ifp; 257 int s; 258 259 fwip = (struct fwip_softc *)device_get_softc(dev); 260 ifp = fwip->fw_softc.fwip_ifp; 261 262 #ifdef DEVICE_POLLING 263 if (ifp->if_capenable & IFCAP_POLLING) 264 ether_poll_deregister(ifp); 265 #endif 266 267 s = splimp(); 268 269 fwip_stop(fwip); 270 firewire_ifdetach(ifp); 271 if_free(ifp); 272 mtx_destroy(&fwip->mtx); 273 274 splx(s); 275 return 0; 276 } 277 278 static void 279 fwip_init(void *arg) 280 { 281 struct fwip_softc *fwip = ((struct fwip_eth_softc *)arg)->fwip; 282 struct firewire_comm *fc; 283 struct ifnet *ifp = fwip->fw_softc.fwip_ifp; 284 struct fw_xferq *xferq; 285 struct fw_xfer *xfer; 286 struct mbuf *m; 287 int i; 288 289 FWIPDEBUG(ifp, "initializing\n"); 290 291 fc = fwip->fd.fc; 292 #define START 0 293 if (fwip->dma_ch < 0) { 294 fwip->dma_ch = fw_open_isodma(fc, /* tx */0); 295 if (fwip->dma_ch < 0) 296 return; 297 xferq = fc->ir[fwip->dma_ch]; 298 xferq->flag |= FWXFERQ_EXTBUF | 299 FWXFERQ_HANDLER | FWXFERQ_STREAM; 300 xferq->flag &= ~0xff; 301 xferq->flag |= broadcast_channel & 0xff; 302 /* register fwip_input handler */ 303 xferq->sc = (caddr_t) fwip; 304 xferq->hand = fwip_stream_input; 305 xferq->bnchunk = rx_queue_len; 306 xferq->bnpacket = 1; 307 xferq->psize = MCLBYTES; 308 xferq->queued = 0; 309 xferq->buf = NULL; 310 xferq->bulkxfer = (struct fw_bulkxfer *) malloc( 311 sizeof(struct fw_bulkxfer) * xferq->bnchunk, 312 M_FWIP, M_WAITOK); 313 if (xferq->bulkxfer == NULL) { 314 printf("if_fwip: malloc failed\n"); 315 return; 316 } 317 STAILQ_INIT(&xferq->stvalid); 318 STAILQ_INIT(&xferq->stfree); 319 STAILQ_INIT(&xferq->stdma); 320 xferq->stproc = NULL; 321 for (i = 0; i < xferq->bnchunk; i++) { 322 m = m_getcl(M_WAITOK, MT_DATA, M_PKTHDR); 323 xferq->bulkxfer[i].mbuf = m; 324 m->m_len = m->m_pkthdr.len = m->m_ext.ext_size; 325 STAILQ_INSERT_TAIL(&xferq->stfree, 326 &xferq->bulkxfer[i], link); 327 } 328 329 fwip->fwb.start = INET_FIFO; 330 fwip->fwb.end = INET_FIFO + 16384; /* S3200 packet size */ 331 332 /* pre-allocate xfer */ 333 STAILQ_INIT(&fwip->fwb.xferlist); 334 for (i = 0; i < rx_queue_len; i++) { 335 xfer = fw_xfer_alloc(M_FWIP); 336 if (xfer == NULL) 337 break; 338 m = m_getcl(M_WAITOK, MT_DATA, M_PKTHDR); 339 xfer->recv.payload = mtod(m, uint32_t *); 340 xfer->recv.pay_len = MCLBYTES; 341 xfer->hand = fwip_unicast_input; 342 xfer->fc = fc; 343 xfer->sc = (caddr_t)fwip; 344 xfer->mbuf = m; 345 STAILQ_INSERT_TAIL(&fwip->fwb.xferlist, xfer, link); 346 } 347 fw_bindadd(fc, &fwip->fwb); 348 349 STAILQ_INIT(&fwip->xferlist); 350 for (i = 0; i < TX_MAX_QUEUE; i++) { 351 xfer = fw_xfer_alloc(M_FWIP); 352 if (xfer == NULL) 353 break; 354 xfer->send.spd = tx_speed; 355 xfer->fc = fwip->fd.fc; 356 xfer->sc = (caddr_t)fwip; 357 xfer->hand = fwip_output_callback; 358 STAILQ_INSERT_TAIL(&fwip->xferlist, xfer, link); 359 } 360 } else 361 xferq = fc->ir[fwip->dma_ch]; 362 363 fwip->last_dest.hi = 0; 364 fwip->last_dest.lo = 0; 365 366 /* start dma */ 367 if ((xferq->flag & FWXFERQ_RUNNING) == 0) 368 fc->irx_enable(fc, fwip->dma_ch); 369 370 ifp->if_drv_flags |= IFF_DRV_RUNNING; 371 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 372 373 #if 0 374 /* attempt to start output */ 375 fwip_start(ifp); 376 #endif 377 } 378 379 static int 380 fwip_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 381 { 382 struct fwip_softc *fwip = ((struct fwip_eth_softc *)ifp->if_softc)->fwip; 383 int s, error; 384 385 switch (cmd) { 386 case SIOCSIFFLAGS: 387 s = splimp(); 388 if (ifp->if_flags & IFF_UP) { 389 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) 390 fwip_init(&fwip->fw_softc); 391 } else { 392 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 393 fwip_stop(fwip); 394 } 395 splx(s); 396 break; 397 case SIOCADDMULTI: 398 case SIOCDELMULTI: 399 break; 400 case SIOCSIFCAP: 401 #ifdef DEVICE_POLLING 402 { 403 struct ifreq *ifr = (struct ifreq *) data; 404 struct firewire_comm *fc = fwip->fd.fc; 405 406 if (ifr->ifr_reqcap & IFCAP_POLLING && 407 !(ifp->if_capenable & IFCAP_POLLING)) { 408 error = ether_poll_register(fwip_poll, ifp); 409 if (error) 410 return (error); 411 /* Disable interrupts */ 412 fc->set_intr(fc, 0); 413 ifp->if_capenable |= IFCAP_POLLING; 414 return (error); 415 } 416 if (!(ifr->ifr_reqcap & IFCAP_POLLING) && 417 ifp->if_capenable & IFCAP_POLLING) { 418 error = ether_poll_deregister(ifp); 419 /* Enable interrupts. */ 420 fc->set_intr(fc, 1); 421 ifp->if_capenable &= ~IFCAP_POLLING; 422 return (error); 423 } 424 } 425 #endif /* DEVICE_POLLING */ 426 break; 427 default: 428 s = splimp(); 429 error = firewire_ioctl(ifp, cmd, data); 430 splx(s); 431 return (error); 432 } 433 434 return (0); 435 } 436 437 static void 438 fwip_post_busreset(void *arg) 439 { 440 struct fwip_softc *fwip = arg; 441 struct crom_src *src; 442 struct crom_chunk *root; 443 444 src = fwip->fd.fc->crom_src; 445 root = fwip->fd.fc->crom_root; 446 447 /* RFC2734 IPv4 over IEEE1394 */ 448 bzero(&fwip->unit4, sizeof(struct crom_chunk)); 449 crom_add_chunk(src, root, &fwip->unit4, CROM_UDIR); 450 crom_add_entry(&fwip->unit4, CSRKEY_SPEC, CSRVAL_IETF); 451 crom_add_simple_text(src, &fwip->unit4, &fwip->spec4, "IANA"); 452 crom_add_entry(&fwip->unit4, CSRKEY_VER, 1); 453 crom_add_simple_text(src, &fwip->unit4, &fwip->ver4, "IPv4"); 454 455 /* RFC3146 IPv6 over IEEE1394 */ 456 bzero(&fwip->unit6, sizeof(struct crom_chunk)); 457 crom_add_chunk(src, root, &fwip->unit6, CROM_UDIR); 458 crom_add_entry(&fwip->unit6, CSRKEY_SPEC, CSRVAL_IETF); 459 crom_add_simple_text(src, &fwip->unit6, &fwip->spec6, "IANA"); 460 crom_add_entry(&fwip->unit6, CSRKEY_VER, 2); 461 crom_add_simple_text(src, &fwip->unit6, &fwip->ver6, "IPv6"); 462 463 fwip->last_dest.hi = 0; 464 fwip->last_dest.lo = 0; 465 firewire_busreset(fwip->fw_softc.fwip_ifp); 466 } 467 468 static void 469 fwip_output_callback(struct fw_xfer *xfer) 470 { 471 struct fwip_softc *fwip; 472 struct ifnet *ifp; 473 int s; 474 475 fwip = (struct fwip_softc *)xfer->sc; 476 ifp = fwip->fw_softc.fwip_ifp; 477 /* XXX error check */ 478 FWIPDEBUG(ifp, "resp = %d\n", xfer->resp); 479 if (xfer->resp != 0) 480 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 481 m_freem(xfer->mbuf); 482 fw_xfer_unload(xfer); 483 484 s = splimp(); 485 FWIP_LOCK(fwip); 486 STAILQ_INSERT_TAIL(&fwip->xferlist, xfer, link); 487 FWIP_UNLOCK(fwip); 488 splx(s); 489 490 /* for queue full */ 491 if (ifp->if_snd.ifq_head != NULL) { 492 fwip_start(ifp); 493 } 494 } 495 496 static void 497 fwip_start(struct ifnet *ifp) 498 { 499 struct fwip_softc *fwip = ((struct fwip_eth_softc *)ifp->if_softc)->fwip; 500 int s; 501 502 FWIPDEBUG(ifp, "starting\n"); 503 504 if (fwip->dma_ch < 0) { 505 struct mbuf *m = NULL; 506 507 FWIPDEBUG(ifp, "not ready\n"); 508 509 s = splimp(); 510 do { 511 IF_DEQUEUE(&ifp->if_snd, m); 512 if (m != NULL) 513 m_freem(m); 514 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 515 } while (m != NULL); 516 splx(s); 517 518 return; 519 } 520 521 s = splimp(); 522 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 523 524 if (ifp->if_snd.ifq_len != 0) 525 fwip_async_output(fwip, ifp); 526 527 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 528 splx(s); 529 } 530 531 /* Async. stream output */ 532 static void 533 fwip_async_output(struct fwip_softc *fwip, struct ifnet *ifp) 534 { 535 struct firewire_comm *fc = fwip->fd.fc; 536 struct mbuf *m; 537 struct m_tag *mtag; 538 struct fw_hwaddr *destfw; 539 struct fw_xfer *xfer; 540 struct fw_xferq *xferq; 541 struct fw_pkt *fp; 542 uint16_t nodeid; 543 int error; 544 int i = 0; 545 546 xfer = NULL; 547 xferq = fc->atq; 548 while ((xferq->queued < xferq->maxq - 1) && 549 (ifp->if_snd.ifq_head != NULL)) { 550 FWIP_LOCK(fwip); 551 xfer = STAILQ_FIRST(&fwip->xferlist); 552 if (xfer == NULL) { 553 FWIP_UNLOCK(fwip); 554 #if 0 555 printf("if_fwip: lack of xfer\n"); 556 #endif 557 break; 558 } 559 STAILQ_REMOVE_HEAD(&fwip->xferlist, link); 560 FWIP_UNLOCK(fwip); 561 562 IF_DEQUEUE(&ifp->if_snd, m); 563 if (m == NULL) { 564 FWIP_LOCK(fwip); 565 STAILQ_INSERT_HEAD(&fwip->xferlist, xfer, link); 566 FWIP_UNLOCK(fwip); 567 break; 568 } 569 570 /* 571 * Dig out the link-level address which 572 * firewire_output got via arp or neighbour 573 * discovery. If we don't have a link-level address, 574 * just stick the thing on the broadcast channel. 575 */ 576 mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR, 0); 577 if (mtag == NULL) 578 destfw = NULL; 579 else 580 destfw = (struct fw_hwaddr *) (mtag + 1); 581 582 583 /* 584 * We don't do any bpf stuff here - the generic code 585 * in firewire_output gives the packet to bpf before 586 * it adds the link-level encapsulation. 587 */ 588 589 /* 590 * Put the mbuf in the xfer early in case we hit an 591 * error case below - fwip_output_callback will free 592 * the mbuf. 593 */ 594 xfer->mbuf = m; 595 596 /* 597 * We use the arp result (if any) to add a suitable firewire 598 * packet header before handing off to the bus. 599 */ 600 fp = &xfer->send.hdr; 601 nodeid = FWLOCALBUS | fc->nodeid; 602 if ((m->m_flags & M_BCAST) || !destfw) { 603 /* 604 * Broadcast packets are sent as GASP packets with 605 * specifier ID 0x00005e, version 1 on the broadcast 606 * channel. To be conservative, we send at the 607 * slowest possible speed. 608 */ 609 uint32_t *p; 610 611 M_PREPEND(m, 2*sizeof(uint32_t), M_NOWAIT); 612 p = mtod(m, uint32_t *); 613 fp->mode.stream.len = m->m_pkthdr.len; 614 fp->mode.stream.chtag = broadcast_channel; 615 fp->mode.stream.tcode = FWTCODE_STREAM; 616 fp->mode.stream.sy = 0; 617 xfer->send.spd = 0; 618 p[0] = htonl(nodeid << 16); 619 p[1] = htonl((0x5e << 24) | 1); 620 } else { 621 /* 622 * Unicast packets are sent as block writes to the 623 * target's unicast fifo address. If we can't 624 * find the node address, we just give up. We 625 * could broadcast it but that might overflow 626 * the packet size limitations due to the 627 * extra GASP header. Note: the hardware 628 * address is stored in network byte order to 629 * make life easier for ARP. 630 */ 631 struct fw_device *fd; 632 struct fw_eui64 eui; 633 634 eui.hi = ntohl(destfw->sender_unique_ID_hi); 635 eui.lo = ntohl(destfw->sender_unique_ID_lo); 636 if (fwip->last_dest.hi != eui.hi || 637 fwip->last_dest.lo != eui.lo) { 638 fd = fw_noderesolve_eui64(fc, &eui); 639 if (!fd) { 640 /* error */ 641 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 642 /* XXX set error code */ 643 fwip_output_callback(xfer); 644 continue; 645 646 } 647 fwip->last_hdr.mode.wreqb.dst = FWLOCALBUS | fd->dst; 648 fwip->last_hdr.mode.wreqb.tlrt = 0; 649 fwip->last_hdr.mode.wreqb.tcode = FWTCODE_WREQB; 650 fwip->last_hdr.mode.wreqb.pri = 0; 651 fwip->last_hdr.mode.wreqb.src = nodeid; 652 fwip->last_hdr.mode.wreqb.dest_hi = 653 ntohs(destfw->sender_unicast_FIFO_hi); 654 fwip->last_hdr.mode.wreqb.dest_lo = 655 ntohl(destfw->sender_unicast_FIFO_lo); 656 fwip->last_hdr.mode.wreqb.extcode = 0; 657 fwip->last_dest = eui; 658 } 659 660 fp->mode.wreqb = fwip->last_hdr.mode.wreqb; 661 fp->mode.wreqb.len = m->m_pkthdr.len; 662 xfer->send.spd = min(destfw->sspd, fc->speed); 663 } 664 665 xfer->send.pay_len = m->m_pkthdr.len; 666 667 error = fw_asyreq(fc, -1, xfer); 668 if (error == EAGAIN) { 669 /* 670 * We ran out of tlabels - requeue the packet 671 * for later transmission. 672 */ 673 xfer->mbuf = 0; 674 FWIP_LOCK(fwip); 675 STAILQ_INSERT_TAIL(&fwip->xferlist, xfer, link); 676 FWIP_UNLOCK(fwip); 677 IF_PREPEND(&ifp->if_snd, m); 678 break; 679 } 680 if (error) { 681 /* error */ 682 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 683 /* XXX set error code */ 684 fwip_output_callback(xfer); 685 continue; 686 } else { 687 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 688 i++; 689 } 690 } 691 #if 0 692 if (i > 1) 693 printf("%d queued\n", i); 694 #endif 695 if (i > 0) 696 xferq->start(fc); 697 } 698 699 static void 700 fwip_start_send (void *arg, int count) 701 { 702 struct fwip_softc *fwip = arg; 703 704 fwip->fd.fc->atq->start(fwip->fd.fc); 705 } 706 707 /* Async. stream output */ 708 static void 709 fwip_stream_input(struct fw_xferq *xferq) 710 { 711 struct epoch_tracker et; 712 struct mbuf *m, *m0; 713 struct m_tag *mtag; 714 struct ifnet *ifp; 715 struct fwip_softc *fwip; 716 struct fw_bulkxfer *sxfer; 717 struct fw_pkt *fp; 718 uint16_t src; 719 uint32_t *p; 720 721 fwip = (struct fwip_softc *)xferq->sc; 722 ifp = fwip->fw_softc.fwip_ifp; 723 724 NET_EPOCH_ENTER(et); 725 while ((sxfer = STAILQ_FIRST(&xferq->stvalid)) != NULL) { 726 STAILQ_REMOVE_HEAD(&xferq->stvalid, link); 727 fp = mtod(sxfer->mbuf, struct fw_pkt *); 728 if (fwip->fd.fc->irx_post != NULL) 729 fwip->fd.fc->irx_post(fwip->fd.fc, fp->mode.ld); 730 m = sxfer->mbuf; 731 732 /* insert new rbuf */ 733 sxfer->mbuf = m0 = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 734 if (m0 != NULL) { 735 m0->m_len = m0->m_pkthdr.len = m0->m_ext.ext_size; 736 STAILQ_INSERT_TAIL(&xferq->stfree, sxfer, link); 737 } else 738 printf("fwip_as_input: m_getcl failed\n"); 739 740 /* 741 * We must have a GASP header - leave the 742 * encapsulation sanity checks to the generic 743 * code. Remember that we also have the firewire async 744 * stream header even though that isn't accounted for 745 * in mode.stream.len. 746 */ 747 if (sxfer->resp != 0 || fp->mode.stream.len < 748 2*sizeof(uint32_t)) { 749 m_freem(m); 750 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 751 continue; 752 } 753 m->m_len = m->m_pkthdr.len = fp->mode.stream.len 754 + sizeof(fp->mode.stream); 755 756 /* 757 * If we received the packet on the broadcast channel, 758 * mark it as broadcast, otherwise we assume it must 759 * be multicast. 760 */ 761 if (fp->mode.stream.chtag == broadcast_channel) 762 m->m_flags |= M_BCAST; 763 else 764 m->m_flags |= M_MCAST; 765 766 /* 767 * Make sure we recognise the GASP specifier and 768 * version. 769 */ 770 p = mtod(m, uint32_t *); 771 if ((((ntohl(p[1]) & 0xffff) << 8) | ntohl(p[2]) >> 24) != 0x00005e 772 || (ntohl(p[2]) & 0xffffff) != 1) { 773 FWIPDEBUG(ifp, "Unrecognised GASP header %#08x %#08x\n", 774 ntohl(p[1]), ntohl(p[2])); 775 m_freem(m); 776 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 777 continue; 778 } 779 780 /* 781 * Record the sender ID for possible BPF usage. 782 */ 783 src = ntohl(p[1]) >> 16; 784 if (bpf_peers_present(ifp->if_bpf)) { 785 mtag = m_tag_alloc(MTAG_FIREWIRE, 786 MTAG_FIREWIRE_SENDER_EUID, 787 2*sizeof(uint32_t), M_NOWAIT); 788 if (mtag) { 789 /* bpf wants it in network byte order */ 790 struct fw_device *fd; 791 uint32_t *p = (uint32_t *) (mtag + 1); 792 fd = fw_noderesolve_nodeid(fwip->fd.fc, 793 src & 0x3f); 794 if (fd) { 795 p[0] = htonl(fd->eui.hi); 796 p[1] = htonl(fd->eui.lo); 797 } else { 798 p[0] = 0; 799 p[1] = 0; 800 } 801 m_tag_prepend(m, mtag); 802 } 803 } 804 805 /* 806 * Trim off the GASP header 807 */ 808 m_adj(m, 3*sizeof(uint32_t)); 809 m->m_pkthdr.rcvif = ifp; 810 firewire_input(ifp, m, src); 811 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); 812 } 813 NET_EPOCH_EXIT(et); 814 if (STAILQ_FIRST(&xferq->stfree) != NULL) 815 fwip->fd.fc->irx_enable(fwip->fd.fc, fwip->dma_ch); 816 } 817 818 static __inline void 819 fwip_unicast_input_recycle(struct fwip_softc *fwip, struct fw_xfer *xfer) 820 { 821 struct mbuf *m; 822 823 /* 824 * We have finished with a unicast xfer. Allocate a new 825 * cluster and stick it on the back of the input queue. 826 */ 827 m = m_getcl(M_WAITOK, MT_DATA, M_PKTHDR); 828 xfer->mbuf = m; 829 xfer->recv.payload = mtod(m, uint32_t *); 830 xfer->recv.pay_len = MCLBYTES; 831 xfer->mbuf = m; 832 STAILQ_INSERT_TAIL(&fwip->fwb.xferlist, xfer, link); 833 } 834 835 static void 836 fwip_unicast_input(struct fw_xfer *xfer) 837 { 838 uint64_t address; 839 struct mbuf *m; 840 struct m_tag *mtag; 841 struct epoch_tracker et; 842 struct ifnet *ifp; 843 struct fwip_softc *fwip; 844 struct fw_pkt *fp; 845 //struct fw_pkt *sfp; 846 int rtcode; 847 848 fwip = (struct fwip_softc *)xfer->sc; 849 ifp = fwip->fw_softc.fwip_ifp; 850 m = xfer->mbuf; 851 xfer->mbuf = 0; 852 fp = &xfer->recv.hdr; 853 854 /* 855 * Check the fifo address - we only accept addresses of 856 * exactly INET_FIFO. 857 */ 858 address = ((uint64_t)fp->mode.wreqb.dest_hi << 32) 859 | fp->mode.wreqb.dest_lo; 860 if (fp->mode.wreqb.tcode != FWTCODE_WREQB) { 861 rtcode = FWRCODE_ER_TYPE; 862 } else if (address != INET_FIFO) { 863 rtcode = FWRCODE_ER_ADDR; 864 } else { 865 rtcode = FWRCODE_COMPLETE; 866 } 867 NET_EPOCH_ENTER(et); 868 869 /* 870 * Pick up a new mbuf and stick it on the back of the receive 871 * queue. 872 */ 873 fwip_unicast_input_recycle(fwip, xfer); 874 875 /* 876 * If we've already rejected the packet, give up now. 877 */ 878 if (rtcode != FWRCODE_COMPLETE) { 879 m_freem(m); 880 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 881 goto done; 882 } 883 884 if (bpf_peers_present(ifp->if_bpf)) { 885 /* 886 * Record the sender ID for possible BPF usage. 887 */ 888 mtag = m_tag_alloc(MTAG_FIREWIRE, MTAG_FIREWIRE_SENDER_EUID, 889 2*sizeof(uint32_t), M_NOWAIT); 890 if (mtag) { 891 /* bpf wants it in network byte order */ 892 struct fw_device *fd; 893 uint32_t *p = (uint32_t *) (mtag + 1); 894 fd = fw_noderesolve_nodeid(fwip->fd.fc, 895 fp->mode.wreqb.src & 0x3f); 896 if (fd) { 897 p[0] = htonl(fd->eui.hi); 898 p[1] = htonl(fd->eui.lo); 899 } else { 900 p[0] = 0; 901 p[1] = 0; 902 } 903 m_tag_prepend(m, mtag); 904 } 905 } 906 907 /* 908 * Hand off to the generic encapsulation code. We don't use 909 * ifp->if_input so that we can pass the source nodeid as an 910 * argument to facilitate link-level fragment reassembly. 911 */ 912 m->m_len = m->m_pkthdr.len = fp->mode.wreqb.len; 913 m->m_pkthdr.rcvif = ifp; 914 firewire_input(ifp, m, fp->mode.wreqb.src); 915 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); 916 done: 917 NET_EPOCH_EXIT(et); 918 } 919 920 static device_method_t fwip_methods[] = { 921 /* device interface */ 922 DEVMETHOD(device_identify, fwip_identify), 923 DEVMETHOD(device_probe, fwip_probe), 924 DEVMETHOD(device_attach, fwip_attach), 925 DEVMETHOD(device_detach, fwip_detach), 926 { 0, 0 } 927 }; 928 929 static driver_t fwip_driver = { 930 "fwip", 931 fwip_methods, 932 sizeof(struct fwip_softc), 933 }; 934 935 936 DRIVER_MODULE(fwip, firewire, fwip_driver, 0, 0); 937 MODULE_VERSION(fwip, 1); 938 MODULE_DEPEND(fwip, firewire, 1, 1, 1);
Cache object: 8e60f8f3c9ca0f91b4e134f0d6e1789a
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