sys/dev/firewire/if_fwe.c

   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  * $FreeBSD$
  35  */
  36
  37 #ifdef HAVE_KERNEL_OPTION_HEADERS
  38 #include "opt_device_polling.h"
  39 #include "opt_inet.h"
  40 #endif
  41
  42 #include <sys/param.h>
  43 #include <sys/kernel.h>
  44 #include <sys/malloc.h>
  45 #include <sys/mbuf.h>
  46 #include <sys/socket.h>
  47 #include <sys/sockio.h>
  48 #include <sys/sysctl.h>
  49 #include <sys/systm.h>
  50 #include <sys/module.h>
  51 #include <sys/bus.h>
  52 #include <machine/bus.h>
  53
  54 #include <net/bpf.h>
  55 #include <net/ethernet.h>
  56 #include <net/if.h>
  57 #include <net/if_var.h>
  58 #include <net/if_arp.h>
  59 #include <net/if_types.h>
  60 #include <net/if_vlan_var.h>
  61
  62 #include <dev/firewire/firewire.h>
  63 #include <dev/firewire/firewirereg.h>
  64 #include <dev/firewire/if_fwevar.h>
  65
  66 #define FWEDEBUG        if (fwedebug) if_printf
  67 #define TX_MAX_QUEUE    (FWMAXQUEUE - 1)
  68
  69 /* network interface */
  70 static void fwe_start (struct ifnet *);
  71 static int fwe_ioctl (struct ifnet *, u_long, caddr_t);
  72 static void fwe_init (void *);
  73
  74 static void fwe_output_callback (struct fw_xfer *);
  75 static void fwe_as_output (struct fwe_softc *, struct ifnet *);
  76 static void fwe_as_input (struct fw_xferq *);
  77
  78 static int fwedebug = 0;
  79 static int stream_ch = 1;
  80 static int tx_speed = 2;
  81 static int rx_queue_len = FWMAXQUEUE;
  82
  83 static MALLOC_DEFINE(M_FWE, "if_fwe", "Ethernet over FireWire interface");
  84 SYSCTL_INT(_debug, OID_AUTO, if_fwe_debug, CTLFLAG_RWTUN, &fwedebug, 0, "");
  85 SYSCTL_DECL(_hw_firewire);
  86 static SYSCTL_NODE(_hw_firewire, OID_AUTO, fwe, CTLFLAG_RD, 0,
  87         "Ethernet emulation subsystem");
  88 SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, stream_ch, CTLFLAG_RWTUN, &stream_ch, 0,
  89         "Stream channel to use");
  90 SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, tx_speed, CTLFLAG_RWTUN, &tx_speed, 0,
  91         "Transmission speed");
  92 SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, rx_queue_len, CTLFLAG_RWTUN, &rx_queue_len,
  93         0, "Length of the receive queue");
  94
  95 #ifdef DEVICE_POLLING
  96 static poll_handler_t fwe_poll;
  97
  98 static int
  99 fwe_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
 100 {
 101         struct fwe_softc *fwe;
 102         struct firewire_comm *fc;
 103
 104         if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
 105                 return (0);
 106
 107         fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe;
 108         fc = fwe->fd.fc;
 109         fc->poll(fc, (cmd == POLL_AND_CHECK_STATUS)?0:1, count);
 110         return (0);
 111 }
 112 #endif /* DEVICE_POLLING */
 113
 114 static void
 115 fwe_identify(driver_t *driver, device_t parent)
 116 {
 117         BUS_ADD_CHILD(parent, 0, "fwe", device_get_unit(parent));
 118 }
 119
 120 static int
 121 fwe_probe(device_t dev)
 122 {
 123         device_t pa;
 124
 125         pa = device_get_parent(dev);
 126         if (device_get_unit(dev) != device_get_unit(pa)) {
 127                 return (ENXIO);
 128         }
 129
 130         device_set_desc(dev, "Ethernet over FireWire");
 131         return (0);
 132 }
 133
 134 static int
 135 fwe_attach(device_t dev)
 136 {
 137         struct fwe_softc *fwe;
 138         struct ifnet *ifp;
 139         int unit, s;
 140         u_char eaddr[6];
 141         struct fw_eui64 *eui;
 142
 143         fwe = ((struct fwe_softc *)device_get_softc(dev));
 144         unit = device_get_unit(dev);
 145
 146         bzero(fwe, sizeof(struct fwe_softc));
 147         mtx_init(&fwe->mtx, "fwe", NULL, MTX_DEF);
 148         /* XXX */
 149         fwe->stream_ch = stream_ch;
 150         fwe->dma_ch = -1;
 151
 152         fwe->fd.fc = device_get_ivars(dev);
 153         if (tx_speed < 0)
 154                 tx_speed = fwe->fd.fc->speed;
 155
 156         fwe->fd.dev = dev;
 157         fwe->fd.post_explore = NULL;
 158         fwe->eth_softc.fwe = fwe;
 159
 160         fwe->pkt_hdr.mode.stream.tcode = FWTCODE_STREAM;
 161         fwe->pkt_hdr.mode.stream.sy = 0;
 162         fwe->pkt_hdr.mode.stream.chtag = fwe->stream_ch;
 163
 164         /* generate fake MAC address: first and last 3bytes from eui64 */
 165 #define LOCAL (0x02)
 166 #define GROUP (0x01)
 167
 168         eui = &fwe->fd.fc->eui;
 169         eaddr[0] = (FW_EUI64_BYTE(eui, 0) | LOCAL) & ~GROUP;
 170         eaddr[1] = FW_EUI64_BYTE(eui, 1);
 171         eaddr[2] = FW_EUI64_BYTE(eui, 2);
 172         eaddr[3] = FW_EUI64_BYTE(eui, 5);
 173         eaddr[4] = FW_EUI64_BYTE(eui, 6);
 174         eaddr[5] = FW_EUI64_BYTE(eui, 7);
 175         printf("if_fwe%d: Fake Ethernet address: "
 176                 "%02x:%02x:%02x:%02x:%02x:%02x\n", unit,
 177                 eaddr[0], eaddr[1], eaddr[2], eaddr[3], eaddr[4], eaddr[5]);
 178
 179         /* fill the rest and attach interface */
 180         ifp = fwe->eth_softc.ifp = if_alloc(IFT_ETHER);
 181         if (ifp == NULL) {
 182                 device_printf(dev, "can not if_alloc()\n");
 183                 return (ENOSPC);
 184         }
 185         ifp->if_softc = &fwe->eth_softc;
 186
 187         if_initname(ifp, device_get_name(dev), unit);
 188         ifp->if_init = fwe_init;
 189         ifp->if_start = fwe_start;
 190         ifp->if_ioctl = fwe_ioctl;
 191         ifp->if_flags = (IFF_BROADCAST|IFF_SIMPLEX|IFF_MULTICAST);
 192         ifp->if_snd.ifq_maxlen = TX_MAX_QUEUE;
 193
 194         s = splimp();
 195         ether_ifattach(ifp, eaddr);
 196         splx(s);
 197
 198         /* Tell the upper layer(s) we support long frames. */
 199         ifp->if_hdrlen = sizeof(struct ether_vlan_header);
 200         ifp->if_capabilities |= IFCAP_VLAN_MTU | IFCAP_POLLING;
 201         ifp->if_capenable |= IFCAP_VLAN_MTU;
 202
 203         FWEDEBUG(ifp, "interface created\n");
 204         return 0;
 205 }
 206
 207 static void
 208 fwe_stop(struct fwe_softc *fwe)
 209 {
 210         struct firewire_comm *fc;
 211         struct fw_xferq *xferq;
 212         struct ifnet *ifp = fwe->eth_softc.ifp;
 213         struct fw_xfer *xfer, *next;
 214         int i;
 215
 216         fc = fwe->fd.fc;
 217
 218         if (fwe->dma_ch >= 0) {
 219                 xferq = fc->ir[fwe->dma_ch];
 220
 221                 if (xferq->flag & FWXFERQ_RUNNING)
 222                         fc->irx_disable(fc, fwe->dma_ch);
 223                 xferq->flag &=
 224                         ~(FWXFERQ_MODEMASK | FWXFERQ_OPEN | FWXFERQ_STREAM |
 225                         FWXFERQ_EXTBUF | FWXFERQ_HANDLER | FWXFERQ_CHTAGMASK);
 226                 xferq->hand =  NULL;
 227
 228                 for (i = 0; i < xferq->bnchunk; i++)
 229                         m_freem(xferq->bulkxfer[i].mbuf);
 230                 free(xferq->bulkxfer, M_FWE);
 231
 232                 for (xfer = STAILQ_FIRST(&fwe->xferlist); xfer != NULL;
 233                                         xfer = next) {
 234                         next = STAILQ_NEXT(xfer, link);
 235                         fw_xfer_free(xfer);
 236                 }
 237                 STAILQ_INIT(&fwe->xferlist);
 238
 239                 xferq->bulkxfer =  NULL;
 240                 fwe->dma_ch = -1;
 241         }
 242
 243         ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
 244 }
 245
 246 static int
 247 fwe_detach(device_t dev)
 248 {
 249         struct fwe_softc *fwe;
 250         struct ifnet *ifp;
 251         int s;
 252
 253         fwe = device_get_softc(dev);
 254         ifp = fwe->eth_softc.ifp;
 255
 256 #ifdef DEVICE_POLLING
 257         if (ifp->if_capenable & IFCAP_POLLING)
 258                 ether_poll_deregister(ifp);
 259 #endif
 260         s = splimp();
 261
 262         fwe_stop(fwe);
 263         ether_ifdetach(ifp);
 264         if_free(ifp);
 265
 266         splx(s);
 267         mtx_destroy(&fwe->mtx);
 268         return 0;
 269 }
 270
 271 static void
 272 fwe_init(void *arg)
 273 {
 274         struct fwe_softc *fwe = ((struct fwe_eth_softc *)arg)->fwe;
 275         struct firewire_comm *fc;
 276         struct ifnet *ifp = fwe->eth_softc.ifp;
 277         struct fw_xferq *xferq;
 278         struct fw_xfer *xfer;
 279         struct mbuf *m;
 280         int i;
 281
 282         FWEDEBUG(ifp, "initializing\n");
 283
 284         /* XXX keep promiscoud mode */
 285         ifp->if_flags |= IFF_PROMISC;
 286
 287         fc = fwe->fd.fc;
 288         if (fwe->dma_ch < 0) {
 289                 fwe->dma_ch = fw_open_isodma(fc, /* tx */0);
 290                 if (fwe->dma_ch < 0)
 291                         return;
 292                 xferq = fc->ir[fwe->dma_ch];
 293                 xferq->flag |= FWXFERQ_EXTBUF |
 294                                 FWXFERQ_HANDLER | FWXFERQ_STREAM;
 295                 fwe->stream_ch = stream_ch;
 296                 fwe->pkt_hdr.mode.stream.chtag = fwe->stream_ch;
 297                 xferq->flag &= ~0xff;
 298                 xferq->flag |= fwe->stream_ch & 0xff;
 299                 /* register fwe_input handler */
 300                 xferq->sc = (caddr_t) fwe;
 301                 xferq->hand = fwe_as_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 = (struct fw_bulkxfer *) malloc(
 308                         sizeof(struct fw_bulkxfer) * xferq->bnchunk,
 309                                                         M_FWE, 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                 STAILQ_INIT(&fwe->xferlist);
 322                 for (i = 0; i < TX_MAX_QUEUE; i++) {
 323                         xfer = fw_xfer_alloc(M_FWE);
 324                         if (xfer == NULL)
 325                                 break;
 326                         xfer->send.spd = tx_speed;
 327                         xfer->fc = fwe->fd.fc;
 328                         xfer->sc = (caddr_t)fwe;
 329                         xfer->hand = fwe_output_callback;
 330                         STAILQ_INSERT_TAIL(&fwe->xferlist, xfer, link);
 331                 }
 332         } else
 333                 xferq = fc->ir[fwe->dma_ch];
 334
 335
 336         /* start dma */
 337         if ((xferq->flag & FWXFERQ_RUNNING) == 0)
 338                 fc->irx_enable(fc, fwe->dma_ch);
 339
 340         ifp->if_drv_flags |= IFF_DRV_RUNNING;
 341         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 342
 343 #if 0
 344         /* attempt to start output */
 345         fwe_start(ifp);
 346 #endif
 347 }
 348
 349
 350 static int
 351 fwe_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 352 {
 353         struct fwe_softc *fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe;
 354         struct ifstat *ifs = NULL;
 355         int s, error;
 356
 357         switch (cmd) {
 358                 case SIOCSIFFLAGS:
 359                         s = splimp();
 360                         if (ifp->if_flags & IFF_UP) {
 361                                 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
 362                                         fwe_init(&fwe->eth_softc);
 363                         } else {
 364                                 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 365                                         fwe_stop(fwe);
 366                         }
 367                         /* XXX keep promiscoud mode */
 368                         ifp->if_flags |= IFF_PROMISC;
 369                         splx(s);
 370                         break;
 371                 case SIOCADDMULTI:
 372                 case SIOCDELMULTI:
 373                         break;
 374
 375                 case SIOCGIFSTATUS:
 376                         s = splimp();
 377                         ifs = (struct ifstat *)data;
 378                         snprintf(ifs->ascii, sizeof(ifs->ascii),
 379                             "\tch %d dma %d\n", fwe->stream_ch, fwe->dma_ch);
 380                         splx(s);
 381                         break;
 382                 case SIOCSIFCAP:
 383 #ifdef DEVICE_POLLING
 384                     {
 385                         struct ifreq *ifr = (struct ifreq *) data;
 386                         struct firewire_comm *fc = fwe->fd.fc;
 387
 388                         if (ifr->ifr_reqcap & IFCAP_POLLING &&
 389                             !(ifp->if_capenable & IFCAP_POLLING)) {
 390                                 error = ether_poll_register(fwe_poll, ifp);
 391                                 if (error)
 392                                         return (error);
 393                                 /* Disable interrupts */
 394                                 fc->set_intr(fc, 0);
 395                                 ifp->if_capenable |= IFCAP_POLLING;
 396                                 ifp->if_capenable |= IFCAP_POLLING_NOCOUNT;
 397                                 return (error);
 398                         }
 399                         if (!(ifr->ifr_reqcap & IFCAP_POLLING) &&
 400                             ifp->if_capenable & IFCAP_POLLING) {
 401                                 error = ether_poll_deregister(ifp);
 402                                 /* Enable interrupts. */
 403                                 fc->set_intr(fc, 1);
 404                                 ifp->if_capenable &= ~IFCAP_POLLING;
 405                                 ifp->if_capenable &= ~IFCAP_POLLING_NOCOUNT;
 406                                 return (error);
 407                         }
 408                     }
 409 #endif /* DEVICE_POLLING */
 410                         break;
 411                 default:
 412                         s = splimp();
 413                         error = ether_ioctl(ifp, cmd, data);
 414                         splx(s);
 415                         return (error);
 416         }
 417
 418         return (0);
 419 }
 420
 421 static void
 422 fwe_output_callback(struct fw_xfer *xfer)
 423 {
 424         struct fwe_softc *fwe;
 425         struct ifnet *ifp;
 426         int s;
 427
 428         fwe = (struct fwe_softc *)xfer->sc;
 429         ifp = fwe->eth_softc.ifp;
 430         /* XXX error check */
 431         FWEDEBUG(ifp, "resp = %d\n", xfer->resp);
 432         if (xfer->resp != 0)
 433                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
 434         m_freem(xfer->mbuf);
 435         fw_xfer_unload(xfer);
 436
 437         s = splimp();
 438         FWE_LOCK(fwe);
 439         STAILQ_INSERT_TAIL(&fwe->xferlist, xfer, link);
 440         FWE_UNLOCK(fwe);
 441         splx(s);
 442
 443         /* for queue full */
 444         if (ifp->if_snd.ifq_head != NULL)
 445                 fwe_start(ifp);
 446 }
 447
 448 static void
 449 fwe_start(struct ifnet *ifp)
 450 {
 451         struct fwe_softc *fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe;
 452         int s;
 453
 454         FWEDEBUG(ifp, "starting\n");
 455
 456         if (fwe->dma_ch < 0) {
 457                 struct mbuf     *m = NULL;
 458
 459                 FWEDEBUG(ifp, "not ready\n");
 460
 461                 s = splimp();
 462                 do {
 463                         IF_DEQUEUE(&ifp->if_snd, m);
 464                         if (m != NULL)
 465                                 m_freem(m);
 466                         if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
 467                 } while (m != NULL);
 468                 splx(s);
 469
 470                 return;
 471         }
 472
 473         s = splimp();
 474         ifp->if_drv_flags |= IFF_DRV_OACTIVE;
 475
 476         if (ifp->if_snd.ifq_len != 0)
 477                 fwe_as_output(fwe, ifp);
 478
 479         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 480         splx(s);
 481 }
 482
 483 #define HDR_LEN 4
 484 #ifndef ETHER_ALIGN
 485 #define ETHER_ALIGN 2
 486 #endif
 487 /* Async. stream output */
 488 static void
 489 fwe_as_output(struct fwe_softc *fwe, struct ifnet *ifp)
 490 {
 491         struct mbuf *m;
 492         struct fw_xfer *xfer;
 493         struct fw_xferq *xferq;
 494         struct fw_pkt *fp;
 495         int i = 0;
 496
 497         xfer = NULL;
 498         xferq = fwe->fd.fc->atq;
 499         while ((xferq->queued < xferq->maxq - 1) &&
 500                         (ifp->if_snd.ifq_head != NULL)) {
 501                 FWE_LOCK(fwe);
 502                 xfer = STAILQ_FIRST(&fwe->xferlist);
 503                 if (xfer == NULL) {
 504 #if 0
 505                         printf("if_fwe: lack of xfer\n");
 506 #endif
 507                         FWE_UNLOCK(fwe);
 508                         break;
 509                 }
 510                 STAILQ_REMOVE_HEAD(&fwe->xferlist, link);
 511                 FWE_UNLOCK(fwe);
 512
 513                 IF_DEQUEUE(&ifp->if_snd, m);
 514                 if (m == NULL) {
 515                         FWE_LOCK(fwe);
 516                         STAILQ_INSERT_HEAD(&fwe->xferlist, xfer, link);
 517                         FWE_UNLOCK(fwe);
 518                         break;
 519                 }
 520                 BPF_MTAP(ifp, m);
 521
 522                 /* keep ip packet alignment for alpha */
 523                 M_PREPEND(m, ETHER_ALIGN, M_NOWAIT);
 524                 fp = &xfer->send.hdr;
 525                 *(uint32_t *)&xfer->send.hdr = *(int32_t *)&fwe->pkt_hdr;
 526                 fp->mode.stream.len = m->m_pkthdr.len;
 527                 xfer->mbuf = m;
 528                 xfer->send.pay_len = m->m_pkthdr.len;
 529
 530                 if (fw_asyreq(fwe->fd.fc, -1, xfer) != 0) {
 531                         /* error */
 532                         if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
 533                         /* XXX set error code */
 534                         fwe_output_callback(xfer);
 535                 } else {
 536                         if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
 537                         i++;
 538                 }
 539         }
 540 #if 0
 541         if (i > 1)
 542                 printf("%d queued\n", i);
 543 #endif
 544         if (i > 0)
 545                 xferq->start(fwe->fd.fc);
 546 }
 547
 548 /* Async. stream output */
 549 static void
 550 fwe_as_input(struct fw_xferq *xferq)
 551 {
 552         struct mbuf *m, *m0;
 553         struct ifnet *ifp;
 554         struct fwe_softc *fwe;
 555         struct fw_bulkxfer *sxfer;
 556         struct fw_pkt *fp;
 557         u_char *c;
 558
 559         fwe = (struct fwe_softc *)xferq->sc;
 560         ifp = fwe->eth_softc.ifp;
 561
 562         /* We do not need a lock here because the bottom half is serialized */
 563         while ((sxfer = STAILQ_FIRST(&xferq->stvalid)) != NULL) {
 564                 STAILQ_REMOVE_HEAD(&xferq->stvalid, link);
 565                 fp = mtod(sxfer->mbuf, struct fw_pkt *);
 566                 if (fwe->fd.fc->irx_post != NULL)
 567                         fwe->fd.fc->irx_post(fwe->fd.fc, fp->mode.ld);
 568                 m = sxfer->mbuf;
 569
 570                 /* insert new rbuf */
 571                 sxfer->mbuf = m0 = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
 572                 if (m0 != NULL) {
 573                         m0->m_len = m0->m_pkthdr.len = m0->m_ext.ext_size;
 574                         STAILQ_INSERT_TAIL(&xferq->stfree, sxfer, link);
 575                 } else
 576                         printf("%s: m_getcl failed\n", __FUNCTION__);
 577
 578                 if (sxfer->resp != 0 || fp->mode.stream.len <
 579                     ETHER_ALIGN + sizeof(struct ether_header)) {
 580                         m_freem(m);
 581                         if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
 582                         continue;
 583                 }
 584
 585                 m->m_data += HDR_LEN + ETHER_ALIGN;
 586                 c = mtod(m, u_char *);
 587                 m->m_len = m->m_pkthdr.len = fp->mode.stream.len - ETHER_ALIGN;
 588                 m->m_pkthdr.rcvif = ifp;
 589 #if 0
 590                 FWEDEBUG(ifp, "%02x %02x %02x %02x %02x %02x\n"
 591                          "%02x %02x %02x %02x %02x %02x\n"
 592                          "%02x %02x %02x %02x\n"
 593                          "%02x %02x %02x %02x\n"
 594                          "%02x %02x %02x %02x\n"
 595                          "%02x %02x %02x %02x\n",
 596                          c[0], c[1], c[2], c[3], c[4], c[5],
 597                          c[6], c[7], c[8], c[9], c[10], c[11],
 598                          c[12], c[13], c[14], c[15],
 599                          c[16], c[17], c[18], c[19],
 600                          c[20], c[21], c[22], c[23],
 601                          c[20], c[21], c[22], c[23]
 602                 );
 603 #endif
 604                 (*ifp->if_input)(ifp, m);
 605                 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
 606         }
 607         if (STAILQ_FIRST(&xferq->stfree) != NULL)
 608                 fwe->fd.fc->irx_enable(fwe->fd.fc, fwe->dma_ch);
 609 }
 610
 611
 612 static devclass_t fwe_devclass;
 613
 614 static device_method_t fwe_methods[] = {
 615         /* device interface */
 616         DEVMETHOD(device_identify,      fwe_identify),
 617         DEVMETHOD(device_probe,         fwe_probe),
 618         DEVMETHOD(device_attach,        fwe_attach),
 619         DEVMETHOD(device_detach,        fwe_detach),
 620         { 0, 0 }
 621 };
 622
 623 static driver_t fwe_driver = {
 624         "fwe",
 625         fwe_methods,
 626         sizeof(struct fwe_softc),
 627 };
 628
 629
 630 DRIVER_MODULE(fwe, firewire, fwe_driver, fwe_devclass, 0, 0);
 631 MODULE_VERSION(fwe, 1);
 632 MODULE_DEPEND(fwe, firewire, 1, 1, 1);