sys/dev/firewire/if_fwe.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-4-Clause
   3  *
   4  * Copyright (c) 2002-2003
   5  *      Hidetoshi Shimokawa. All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *
  18  *      This product includes software developed by Hidetoshi Shimokawa.
  19  *
  20  * 4. Neither the name of the author nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * $FreeBSD$
  37  */
  38
  39 #ifdef HAVE_KERNEL_OPTION_HEADERS
  40 #include "opt_device_polling.h"
  41 #include "opt_inet.h"
  42 #endif
  43
  44 #include <sys/param.h>
  45 #include <sys/kernel.h>
  46 #include <sys/malloc.h>
  47 #include <sys/mbuf.h>
  48 #include <sys/socket.h>
  49 #include <sys/sockio.h>
  50 #include <sys/sysctl.h>
  51 #include <sys/systm.h>
  52 #include <sys/module.h>
  53 #include <sys/bus.h>
  54 #include <machine/bus.h>
  55
  56 #include <net/bpf.h>
  57 #include <net/ethernet.h>
  58 #include <net/if.h>
  59 #include <net/if_var.h>
  60 #include <net/if_arp.h>
  61 #include <net/if_types.h>
  62 #include <net/if_vlan_var.h>
  63
  64 #include <dev/firewire/firewire.h>
  65 #include <dev/firewire/firewirereg.h>
  66 #include <dev/firewire/if_fwevar.h>
  67
  68 #define FWEDEBUG        if (fwedebug) if_printf
  69 #define TX_MAX_QUEUE    (FWMAXQUEUE - 1)
  70
  71 /* network interface */
  72 static void fwe_start (struct ifnet *);
  73 static int fwe_ioctl (struct ifnet *, u_long, caddr_t);
  74 static void fwe_init (void *);
  75
  76 static void fwe_output_callback (struct fw_xfer *);
  77 static void fwe_as_output (struct fwe_softc *, struct ifnet *);
  78 static void fwe_as_input (struct fw_xferq *);
  79
  80 static int fwedebug = 0;
  81 static int stream_ch = 1;
  82 static int tx_speed = 2;
  83 static int rx_queue_len = FWMAXQUEUE;
  84
  85 static MALLOC_DEFINE(M_FWE, "if_fwe", "Ethernet over FireWire interface");
  86 SYSCTL_INT(_debug, OID_AUTO, if_fwe_debug, CTLFLAG_RWTUN, &fwedebug, 0, "");
  87 SYSCTL_DECL(_hw_firewire);
  88 static SYSCTL_NODE(_hw_firewire, OID_AUTO, fwe, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
  89     "Ethernet emulation subsystem");
  90 SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, stream_ch, CTLFLAG_RWTUN, &stream_ch, 0,
  91         "Stream channel to use");
  92 SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, tx_speed, CTLFLAG_RWTUN, &tx_speed, 0,
  93         "Transmission speed");
  94 SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, rx_queue_len, CTLFLAG_RWTUN, &rx_queue_len,
  95         0, "Length of the receive queue");
  96
  97 #ifdef DEVICE_POLLING
  98 static poll_handler_t fwe_poll;
  99
 100 static int
 101 fwe_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
 102 {
 103         struct fwe_softc *fwe;
 104         struct firewire_comm *fc;
 105
 106         if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
 107                 return (0);
 108
 109         fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe;
 110         fc = fwe->fd.fc;
 111         fc->poll(fc, (cmd == POLL_AND_CHECK_STATUS)?0:1, count);
 112         return (0);
 113 }
 114 #endif /* DEVICE_POLLING */
 115
 116 static void
 117 fwe_identify(driver_t *driver, device_t parent)
 118 {
 119         BUS_ADD_CHILD(parent, 0, "fwe", device_get_unit(parent));
 120 }
 121
 122 static int
 123 fwe_probe(device_t dev)
 124 {
 125         device_t pa;
 126
 127         pa = device_get_parent(dev);
 128         if (device_get_unit(dev) != device_get_unit(pa)) {
 129                 return (ENXIO);
 130         }
 131
 132         device_set_desc(dev, "Ethernet over FireWire");
 133         return (0);
 134 }
 135
 136 static int
 137 fwe_attach(device_t dev)
 138 {
 139         struct fwe_softc *fwe;
 140         struct ifnet *ifp;
 141         int unit, s;
 142         u_char eaddr[6];
 143         struct fw_eui64 *eui;
 144
 145         fwe = ((struct fwe_softc *)device_get_softc(dev));
 146         unit = device_get_unit(dev);
 147
 148         bzero(fwe, sizeof(struct fwe_softc));
 149         mtx_init(&fwe->mtx, "fwe", NULL, MTX_DEF);
 150         /* XXX */
 151         fwe->stream_ch = stream_ch;
 152         fwe->dma_ch = -1;
 153
 154         fwe->fd.fc = device_get_ivars(dev);
 155         if (tx_speed < 0)
 156                 tx_speed = fwe->fd.fc->speed;
 157
 158         fwe->fd.dev = dev;
 159         fwe->fd.post_explore = NULL;
 160         fwe->eth_softc.fwe = fwe;
 161
 162         fwe->pkt_hdr.mode.stream.tcode = FWTCODE_STREAM;
 163         fwe->pkt_hdr.mode.stream.sy = 0;
 164         fwe->pkt_hdr.mode.stream.chtag = fwe->stream_ch;
 165
 166         /* generate fake MAC address: first and last 3bytes from eui64 */
 167 #define LOCAL (0x02)
 168 #define GROUP (0x01)
 169
 170         eui = &fwe->fd.fc->eui;
 171         eaddr[0] = (FW_EUI64_BYTE(eui, 0) | LOCAL) & ~GROUP;
 172         eaddr[1] = FW_EUI64_BYTE(eui, 1);
 173         eaddr[2] = FW_EUI64_BYTE(eui, 2);
 174         eaddr[3] = FW_EUI64_BYTE(eui, 5);
 175         eaddr[4] = FW_EUI64_BYTE(eui, 6);
 176         eaddr[5] = FW_EUI64_BYTE(eui, 7);
 177         printf("if_fwe%d: Fake Ethernet address: "
 178                 "%02x:%02x:%02x:%02x:%02x:%02x\n", unit,
 179                 eaddr[0], eaddr[1], eaddr[2], eaddr[3], eaddr[4], eaddr[5]);
 180
 181         /* fill the rest and attach interface */
 182         ifp = fwe->eth_softc.ifp = if_alloc(IFT_ETHER);
 183         if (ifp == NULL) {
 184                 device_printf(dev, "can not if_alloc()\n");
 185                 return (ENOSPC);
 186         }
 187         ifp->if_softc = &fwe->eth_softc;
 188
 189         if_initname(ifp, device_get_name(dev), unit);
 190         ifp->if_init = fwe_init;
 191         ifp->if_start = fwe_start;
 192         ifp->if_ioctl = fwe_ioctl;
 193         ifp->if_flags = (IFF_BROADCAST|IFF_SIMPLEX|IFF_MULTICAST);
 194         ifp->if_snd.ifq_maxlen = TX_MAX_QUEUE;
 195
 196         s = splimp();
 197         ether_ifattach(ifp, eaddr);
 198         splx(s);
 199
 200         /* Tell the upper layer(s) we support long frames. */
 201         ifp->if_hdrlen = sizeof(struct ether_vlan_header);
 202         ifp->if_capabilities |= IFCAP_VLAN_MTU | IFCAP_POLLING;
 203         ifp->if_capenable |= IFCAP_VLAN_MTU;
 204
 205         FWEDEBUG(ifp, "interface created\n");
 206         return 0;
 207 }
 208
 209 static void
 210 fwe_stop(struct fwe_softc *fwe)
 211 {
 212         struct firewire_comm *fc;
 213         struct fw_xferq *xferq;
 214         struct ifnet *ifp = fwe->eth_softc.ifp;
 215         struct fw_xfer *xfer, *next;
 216         int i;
 217
 218         fc = fwe->fd.fc;
 219
 220         if (fwe->dma_ch >= 0) {
 221                 xferq = fc->ir[fwe->dma_ch];
 222
 223                 if (xferq->flag & FWXFERQ_RUNNING)
 224                         fc->irx_disable(fc, fwe->dma_ch);
 225                 xferq->flag &=
 226                         ~(FWXFERQ_MODEMASK | FWXFERQ_OPEN | FWXFERQ_STREAM |
 227                         FWXFERQ_EXTBUF | FWXFERQ_HANDLER | FWXFERQ_CHTAGMASK);
 228                 xferq->hand =  NULL;
 229
 230                 for (i = 0; i < xferq->bnchunk; i++)
 231                         m_freem(xferq->bulkxfer[i].mbuf);
 232                 free(xferq->bulkxfer, M_FWE);
 233
 234                 for (xfer = STAILQ_FIRST(&fwe->xferlist); xfer != NULL;
 235                                         xfer = next) {
 236                         next = STAILQ_NEXT(xfer, link);
 237                         fw_xfer_free(xfer);
 238                 }
 239                 STAILQ_INIT(&fwe->xferlist);
 240
 241                 xferq->bulkxfer =  NULL;
 242                 fwe->dma_ch = -1;
 243         }
 244
 245         ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
 246 }
 247
 248 static int
 249 fwe_detach(device_t dev)
 250 {
 251         struct fwe_softc *fwe;
 252         struct ifnet *ifp;
 253         int s;
 254
 255         fwe = device_get_softc(dev);
 256         ifp = fwe->eth_softc.ifp;
 257
 258 #ifdef DEVICE_POLLING
 259         if (ifp->if_capenable & IFCAP_POLLING)
 260                 ether_poll_deregister(ifp);
 261 #endif
 262         s = splimp();
 263
 264         fwe_stop(fwe);
 265         ether_ifdetach(ifp);
 266         if_free(ifp);
 267
 268         splx(s);
 269         mtx_destroy(&fwe->mtx);
 270         return 0;
 271 }
 272
 273 static void
 274 fwe_init(void *arg)
 275 {
 276         struct fwe_softc *fwe = ((struct fwe_eth_softc *)arg)->fwe;
 277         struct firewire_comm *fc;
 278         struct ifnet *ifp = fwe->eth_softc.ifp;
 279         struct fw_xferq *xferq;
 280         struct fw_xfer *xfer;
 281         struct mbuf *m;
 282         int i;
 283
 284         FWEDEBUG(ifp, "initializing\n");
 285
 286         /* XXX keep promiscoud mode */
 287         ifp->if_flags |= IFF_PROMISC;
 288
 289         fc = fwe->fd.fc;
 290         if (fwe->dma_ch < 0) {
 291                 fwe->dma_ch = fw_open_isodma(fc, /* tx */0);
 292                 if (fwe->dma_ch < 0)
 293                         return;
 294                 xferq = fc->ir[fwe->dma_ch];
 295                 xferq->flag |= FWXFERQ_EXTBUF |
 296                                 FWXFERQ_HANDLER | FWXFERQ_STREAM;
 297                 fwe->stream_ch = stream_ch;
 298                 fwe->pkt_hdr.mode.stream.chtag = fwe->stream_ch;
 299                 xferq->flag &= ~0xff;
 300                 xferq->flag |= fwe->stream_ch & 0xff;
 301                 /* register fwe_input handler */
 302                 xferq->sc = (caddr_t) fwe;
 303                 xferq->hand = fwe_as_input;
 304                 xferq->bnchunk = rx_queue_len;
 305                 xferq->bnpacket = 1;
 306                 xferq->psize = MCLBYTES;
 307                 xferq->queued = 0;
 308                 xferq->buf = NULL;
 309                 xferq->bulkxfer = (struct fw_bulkxfer *) malloc(
 310                         sizeof(struct fw_bulkxfer) * xferq->bnchunk,
 311                                                         M_FWE, M_WAITOK);
 312                 STAILQ_INIT(&xferq->stvalid);
 313                 STAILQ_INIT(&xferq->stfree);
 314                 STAILQ_INIT(&xferq->stdma);
 315                 xferq->stproc = NULL;
 316                 for (i = 0; i < xferq->bnchunk; i++) {
 317                         m = m_getcl(M_WAITOK, MT_DATA, M_PKTHDR);
 318                         xferq->bulkxfer[i].mbuf = m;
 319                         m->m_len = m->m_pkthdr.len = m->m_ext.ext_size;
 320                         STAILQ_INSERT_TAIL(&xferq->stfree,
 321                                         &xferq->bulkxfer[i], link);
 322                 }
 323                 STAILQ_INIT(&fwe->xferlist);
 324                 for (i = 0; i < TX_MAX_QUEUE; i++) {
 325                         xfer = fw_xfer_alloc(M_FWE);
 326                         if (xfer == NULL)
 327                                 break;
 328                         xfer->send.spd = tx_speed;
 329                         xfer->fc = fwe->fd.fc;
 330                         xfer->sc = (caddr_t)fwe;
 331                         xfer->hand = fwe_output_callback;
 332                         STAILQ_INSERT_TAIL(&fwe->xferlist, xfer, link);
 333                 }
 334         } else
 335                 xferq = fc->ir[fwe->dma_ch];
 336
 337
 338         /* start dma */
 339         if ((xferq->flag & FWXFERQ_RUNNING) == 0)
 340                 fc->irx_enable(fc, fwe->dma_ch);
 341
 342         ifp->if_drv_flags |= IFF_DRV_RUNNING;
 343         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 344
 345 #if 0
 346         /* attempt to start output */
 347         fwe_start(ifp);
 348 #endif
 349 }
 350
 351
 352 static int
 353 fwe_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 354 {
 355         struct fwe_softc *fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe;
 356         struct ifstat *ifs = NULL;
 357         int s, error;
 358
 359         switch (cmd) {
 360                 case SIOCSIFFLAGS:
 361                         s = splimp();
 362                         if (ifp->if_flags & IFF_UP) {
 363                                 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
 364                                         fwe_init(&fwe->eth_softc);
 365                         } else {
 366                                 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 367                                         fwe_stop(fwe);
 368                         }
 369                         /* XXX keep promiscoud mode */
 370                         ifp->if_flags |= IFF_PROMISC;
 371                         splx(s);
 372                         break;
 373                 case SIOCADDMULTI:
 374                 case SIOCDELMULTI:
 375                         break;
 376
 377                 case SIOCGIFSTATUS:
 378                         s = splimp();
 379                         ifs = (struct ifstat *)data;
 380                         snprintf(ifs->ascii, sizeof(ifs->ascii),
 381                             "\tch %d dma %d\n", fwe->stream_ch, fwe->dma_ch);
 382                         splx(s);
 383                         break;
 384                 case SIOCSIFCAP:
 385 #ifdef DEVICE_POLLING
 386                     {
 387                         struct ifreq *ifr = (struct ifreq *) data;
 388                         struct firewire_comm *fc = fwe->fd.fc;
 389
 390                         if (ifr->ifr_reqcap & IFCAP_POLLING &&
 391                             !(ifp->if_capenable & IFCAP_POLLING)) {
 392                                 error = ether_poll_register(fwe_poll, ifp);
 393                                 if (error)
 394                                         return (error);
 395                                 /* Disable interrupts */
 396                                 fc->set_intr(fc, 0);
 397                                 ifp->if_capenable |= IFCAP_POLLING;
 398                                 return (error);
 399                         }
 400                         if (!(ifr->ifr_reqcap & IFCAP_POLLING) &&
 401                             ifp->if_capenable & IFCAP_POLLING) {
 402                                 error = ether_poll_deregister(ifp);
 403                                 /* Enable interrupts. */
 404                                 fc->set_intr(fc, 1);
 405                                 ifp->if_capenable &= ~IFCAP_POLLING;
 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);