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_arp.h>
  58 #include <net/if_types.h>
  59 #ifdef __DragonFly__
  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 *);
  77 static int fwe_ioctl (struct ifnet *, u_long, caddr_t);
  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 static MALLOC_DEFINE(M_FWE, "if_fwe", "Ethernet over FireWire interface");
  90 SYSCTL_INT(_debug, OID_AUTO, if_fwe_debug, CTLFLAG_RW, &fwedebug, 0, "");
  91 SYSCTL_DECL(_hw_firewire);
  92 static SYSCTL_NODE(_hw_firewire, OID_AUTO, fwe, CTLFLAG_RD, 0,
  93         "Ethernet emulation subsystem");
  94 SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, stream_ch, CTLFLAG_RW, &stream_ch, 0,
  95         "Stream channel to use");
  96 SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, tx_speed, CTLFLAG_RW, &tx_speed, 0,
  97         "Transmission speed");
  98 SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, rx_queue_len, CTLFLAG_RW, &rx_queue_len,
  99         0, "Length of the receive queue");
 100
 101 TUNABLE_INT("hw.firewire.fwe.stream_ch", &stream_ch);
 102 TUNABLE_INT("hw.firewire.fwe.tx_speed", &tx_speed);
 103 TUNABLE_INT("hw.firewire.fwe.rx_queue_len", &rx_queue_len);
 104
 105 #ifdef DEVICE_POLLING
 106 static poll_handler_t fwe_poll;
 107
 108 static int
 109 fwe_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
 110 {
 111         struct fwe_softc *fwe;
 112         struct firewire_comm *fc;
 113
 114         if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
 115                 return (0);
 116
 117         fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe;
 118         fc = fwe->fd.fc;
 119         fc->poll(fc, (cmd == POLL_AND_CHECK_STATUS)?0:1, count);
 120         return (0);
 121 }
 122 #endif /* DEVICE_POLLING */
 123
 124 static void
 125 fwe_identify(driver_t *driver, device_t parent)
 126 {
 127         BUS_ADD_CHILD(parent, 0, "fwe", device_get_unit(parent));
 128 }
 129
 130 static int
 131 fwe_probe(device_t dev)
 132 {
 133         device_t pa;
 134
 135         pa = device_get_parent(dev);
 136         if(device_get_unit(dev) != device_get_unit(pa)){
 137                 return(ENXIO);
 138         }
 139
 140         device_set_desc(dev, "Ethernet over FireWire");
 141         return (0);
 142 }
 143
 144 static int
 145 fwe_attach(device_t dev)
 146 {
 147         struct fwe_softc *fwe;
 148         struct ifnet *ifp;
 149         int unit, s;
 150 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 151         u_char *eaddr;
 152 #else
 153         u_char eaddr[6];
 154 #endif
 155         struct fw_eui64 *eui;
 156
 157         fwe = ((struct fwe_softc *)device_get_softc(dev));
 158         unit = device_get_unit(dev);
 159
 160         bzero(fwe, sizeof(struct fwe_softc));
 161         mtx_init(&fwe->mtx, "fwe", NULL, MTX_DEF);
 162         /* XXX */
 163         fwe->stream_ch = stream_ch;
 164         fwe->dma_ch = -1;
 165
 166         fwe->fd.fc = device_get_ivars(dev);
 167         if (tx_speed < 0)
 168                 tx_speed = fwe->fd.fc->speed;
 169
 170         fwe->fd.dev = dev;
 171         fwe->fd.post_explore = NULL;
 172         fwe->eth_softc.fwe = fwe;
 173
 174         fwe->pkt_hdr.mode.stream.tcode = FWTCODE_STREAM;
 175         fwe->pkt_hdr.mode.stream.sy = 0;
 176         fwe->pkt_hdr.mode.stream.chtag = fwe->stream_ch;
 177
 178         /* generate fake MAC address: first and last 3bytes from eui64 */
 179 #define LOCAL (0x02)
 180 #define GROUP (0x01)
 181 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 182         eaddr = &IFP2ENADDR(fwe->eth_softc.ifp)[0];
 183 #endif
 184
 185
 186         eui = &fwe->fd.fc->eui;
 187         eaddr[0] = (FW_EUI64_BYTE(eui, 0) | LOCAL) & ~GROUP;
 188         eaddr[1] = FW_EUI64_BYTE(eui, 1);
 189         eaddr[2] = FW_EUI64_BYTE(eui, 2);
 190         eaddr[3] = FW_EUI64_BYTE(eui, 5);
 191         eaddr[4] = FW_EUI64_BYTE(eui, 6);
 192         eaddr[5] = FW_EUI64_BYTE(eui, 7);
 193         printf("if_fwe%d: Fake Ethernet address: "
 194                 "%02x:%02x:%02x:%02x:%02x:%02x\n", unit,
 195                 eaddr[0], eaddr[1], eaddr[2], eaddr[3], eaddr[4], eaddr[5]);
 196
 197         /* fill the rest and attach interface */
 198         ifp = fwe->eth_softc.ifp = if_alloc(IFT_ETHER);
 199         if (ifp == NULL) {
 200                 device_printf(dev, "can not if_alloc()\n");
 201                 return (ENOSPC);
 202         }
 203         ifp->if_softc = &fwe->eth_softc;
 204
 205 #if __FreeBSD_version >= 501113 || defined(__DragonFly__)
 206         if_initname(ifp, device_get_name(dev), unit);
 207 #else
 208         ifp->if_unit = unit;
 209         ifp->if_name = "fwe";
 210 #endif
 211         ifp->if_init = fwe_init;
 212 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 213         ifp->if_output = ether_output;
 214 #endif
 215         ifp->if_start = fwe_start;
 216         ifp->if_ioctl = fwe_ioctl;
 217         ifp->if_flags = (IFF_BROADCAST|IFF_SIMPLEX|IFF_MULTICAST);
 218         ifp->if_snd.ifq_maxlen = TX_MAX_QUEUE;
 219
 220         s = splimp();
 221 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 222         ether_ifattach(ifp, 1);
 223 #else
 224         ether_ifattach(ifp, eaddr);
 225 #endif
 226         splx(s);
 227
 228         /* Tell the upper layer(s) we support long frames. */
 229         ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header);
 230 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
 231         ifp->if_capabilities |= IFCAP_VLAN_MTU | IFCAP_POLLING;
 232         ifp->if_capenable |= IFCAP_VLAN_MTU;
 233 #endif
 234
 235
 236         FWEDEBUG(ifp, "interface created\n");
 237         return 0;
 238 }
 239
 240 static void
 241 fwe_stop(struct fwe_softc *fwe)
 242 {
 243         struct firewire_comm *fc;
 244         struct fw_xferq *xferq;
 245         struct ifnet *ifp = fwe->eth_softc.ifp;
 246         struct fw_xfer *xfer, *next;
 247         int i;
 248
 249         fc = fwe->fd.fc;
 250
 251         if (fwe->dma_ch >= 0) {
 252                 xferq = fc->ir[fwe->dma_ch];
 253
 254                 if (xferq->flag & FWXFERQ_RUNNING)
 255                         fc->irx_disable(fc, fwe->dma_ch);
 256                 xferq->flag &=
 257                         ~(FWXFERQ_MODEMASK | FWXFERQ_OPEN | FWXFERQ_STREAM |
 258                         FWXFERQ_EXTBUF | FWXFERQ_HANDLER | FWXFERQ_CHTAGMASK);
 259                 xferq->hand =  NULL;
 260
 261                 for (i = 0; i < xferq->bnchunk; i ++)
 262                         m_freem(xferq->bulkxfer[i].mbuf);
 263                 free(xferq->bulkxfer, M_FWE);
 264
 265                 for (xfer = STAILQ_FIRST(&fwe->xferlist); xfer != NULL;
 266                                         xfer = next) {
 267                         next = STAILQ_NEXT(xfer, link);
 268                         fw_xfer_free(xfer);
 269                 }
 270                 STAILQ_INIT(&fwe->xferlist);
 271
 272                 xferq->bulkxfer =  NULL;
 273                 fwe->dma_ch = -1;
 274         }
 275
 276 #if defined(__FreeBSD__)
 277         ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
 278 #else
 279         ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
 280 #endif
 281 }
 282
 283 static int
 284 fwe_detach(device_t dev)
 285 {
 286         struct fwe_softc *fwe;
 287         struct ifnet *ifp;
 288         int s;
 289
 290         fwe = device_get_softc(dev);
 291         ifp = fwe->eth_softc.ifp;
 292
 293 #ifdef DEVICE_POLLING
 294         if (ifp->if_capenable & IFCAP_POLLING)
 295                 ether_poll_deregister(ifp);
 296 #endif
 297         s = splimp();
 298
 299         fwe_stop(fwe);
 300 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 301         ether_ifdetach(ifp, 1);
 302 #else
 303         ether_ifdetach(ifp);
 304         if_free(ifp);
 305 #endif
 306
 307         splx(s);
 308         mtx_destroy(&fwe->mtx);
 309         return 0;
 310 }
 311
 312 static void
 313 fwe_init(void *arg)
 314 {
 315         struct fwe_softc *fwe = ((struct fwe_eth_softc *)arg)->fwe;
 316         struct firewire_comm *fc;
 317         struct ifnet *ifp = fwe->eth_softc.ifp;
 318         struct fw_xferq *xferq;
 319         struct fw_xfer *xfer;
 320         struct mbuf *m;
 321         int i;
 322
 323         FWEDEBUG(ifp, "initializing\n");
 324
 325         /* XXX keep promiscoud mode */
 326         ifp->if_flags |= IFF_PROMISC;
 327
 328         fc = fwe->fd.fc;
 329         if (fwe->dma_ch < 0) {
 330                 fwe->dma_ch = fw_open_isodma(fc, /* tx */0);
 331                 if (fwe->dma_ch < 0)
 332                         return;
 333                 xferq = fc->ir[fwe->dma_ch];
 334                 xferq->flag |= FWXFERQ_EXTBUF |
 335                                 FWXFERQ_HANDLER | FWXFERQ_STREAM;
 336                 fwe->stream_ch = stream_ch;
 337                 fwe->pkt_hdr.mode.stream.chtag = fwe->stream_ch;
 338                 xferq->flag &= ~0xff;
 339                 xferq->flag |= fwe->stream_ch & 0xff;
 340                 /* register fwe_input handler */
 341                 xferq->sc = (caddr_t) fwe;
 342                 xferq->hand = fwe_as_input;
 343                 xferq->bnchunk = rx_queue_len;
 344                 xferq->bnpacket = 1;
 345                 xferq->psize = MCLBYTES;
 346                 xferq->queued = 0;
 347                 xferq->buf = NULL;
 348                 xferq->bulkxfer = (struct fw_bulkxfer *) malloc(
 349                         sizeof(struct fw_bulkxfer) * xferq->bnchunk,
 350                                                         M_FWE, M_WAITOK);
 351                 if (xferq->bulkxfer == NULL) {
 352                         printf("if_fwe: malloc failed\n");
 353                         return;
 354                 }
 355                 STAILQ_INIT(&xferq->stvalid);
 356                 STAILQ_INIT(&xferq->stfree);
 357                 STAILQ_INIT(&xferq->stdma);
 358                 xferq->stproc = NULL;
 359                 for (i = 0; i < xferq->bnchunk; i ++) {
 360                         m = m_getcl(M_WAITOK, MT_DATA, M_PKTHDR);
 361                         xferq->bulkxfer[i].mbuf = m;
 362                         m->m_len = m->m_pkthdr.len = m->m_ext.ext_size;
 363                         STAILQ_INSERT_TAIL(&xferq->stfree,
 364                                         &xferq->bulkxfer[i], link);
 365                 }
 366                 STAILQ_INIT(&fwe->xferlist);
 367                 for (i = 0; i < TX_MAX_QUEUE; i++) {
 368                         xfer = fw_xfer_alloc(M_FWE);
 369                         if (xfer == NULL)
 370                                 break;
 371                         xfer->send.spd = tx_speed;
 372                         xfer->fc = fwe->fd.fc;
 373                         xfer->sc = (caddr_t)fwe;
 374                         xfer->hand = fwe_output_callback;
 375                         STAILQ_INSERT_TAIL(&fwe->xferlist, xfer, link);
 376                 }
 377         } else
 378                 xferq = fc->ir[fwe->dma_ch];
 379
 380
 381         /* start dma */
 382         if ((xferq->flag & FWXFERQ_RUNNING) == 0)
 383                 fc->irx_enable(fc, fwe->dma_ch);
 384
 385 #if defined(__FreeBSD__)
 386         ifp->if_drv_flags |= IFF_DRV_RUNNING;
 387         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 388 #else
 389         ifp->if_flags |= IFF_RUNNING;
 390         ifp->if_flags &= ~IFF_OACTIVE;
 391 #endif
 392
 393 #if 0
 394         /* attempt to start output */
 395         fwe_start(ifp);
 396 #endif
 397 }
 398
 399
 400 static int
 401 fwe_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 402 {
 403         struct fwe_softc *fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe;
 404         struct ifstat *ifs = NULL;
 405         int s, error, len;
 406
 407         switch (cmd) {
 408                 case SIOCSIFFLAGS:
 409                         s = splimp();
 410                         if (ifp->if_flags & IFF_UP) {
 411 #if defined(__FreeBSD__)
 412                                 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
 413 #else
 414                                 if (!(ifp->if_flags & IFF_RUNNING))
 415 #endif
 416                                         fwe_init(&fwe->eth_softc);
 417                         } else {
 418 #if defined(__FreeBSD__)
 419                                 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 420 #else
 421                                 if (ifp->if_flags & IFF_RUNNING)
 422 #endif
 423                                         fwe_stop(fwe);
 424                         }
 425                         /* XXX keep promiscoud mode */
 426                         ifp->if_flags |= IFF_PROMISC;
 427                         splx(s);
 428                         break;
 429                 case SIOCADDMULTI:
 430                 case SIOCDELMULTI:
 431                         break;
 432
 433                 case SIOCGIFSTATUS:
 434                         s = splimp();
 435                         ifs = (struct ifstat *)data;
 436                         len = strlen(ifs->ascii);
 437                         if (len < sizeof(ifs->ascii))
 438                                 snprintf(ifs->ascii + len,
 439                                         sizeof(ifs->ascii) - len,
 440                                         "\tch %d dma %d\n",
 441                                                 fwe->stream_ch, fwe->dma_ch);
 442                         splx(s);
 443                         break;
 444                 case SIOCSIFCAP:
 445 #ifdef DEVICE_POLLING
 446                     {
 447                         struct ifreq *ifr = (struct ifreq *) data;
 448                         struct firewire_comm *fc = fwe->fd.fc;
 449
 450                         if (ifr->ifr_reqcap & IFCAP_POLLING &&
 451                             !(ifp->if_capenable & IFCAP_POLLING)) {
 452                                 error = ether_poll_register(fwe_poll, ifp);
 453                                 if (error)
 454                                         return(error);
 455                                 /* Disable interrupts */
 456                                 fc->set_intr(fc, 0);
 457                                 ifp->if_capenable |= IFCAP_POLLING;
 458                                 ifp->if_capenable |= IFCAP_POLLING_NOCOUNT;
 459                                 return (error);
 460                         }
 461                         if (!(ifr->ifr_reqcap & IFCAP_POLLING) &&
 462                             ifp->if_capenable & IFCAP_POLLING) {
 463                                 error = ether_poll_deregister(ifp);
 464                                 /* Enable interrupts. */
 465                                 fc->set_intr(fc, 1);
 466                                 ifp->if_capenable &= ~IFCAP_POLLING;
 467                                 ifp->if_capenable &= ~IFCAP_POLLING_NOCOUNT;
 468                                 return (error);
 469                         }
 470                     }
 471 #endif /* DEVICE_POLLING */
 472                         break;
 473 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
 474                 default:
 475 #else
 476                 case SIOCSIFADDR:
 477                 case SIOCGIFADDR:
 478                 case SIOCSIFMTU:
 479 #endif
 480                         s = splimp();
 481                         error = ether_ioctl(ifp, cmd, data);
 482                         splx(s);
 483                         return (error);
 484 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 485                 default:
 486                         return (EINVAL);
 487 #endif
 488         }
 489
 490         return (0);
 491 }
 492
 493 static void
 494 fwe_output_callback(struct fw_xfer *xfer)
 495 {
 496         struct fwe_softc *fwe;
 497         struct ifnet *ifp;
 498         int s;
 499
 500         fwe = (struct fwe_softc *)xfer->sc;
 501         ifp = fwe->eth_softc.ifp;
 502         /* XXX error check */
 503         FWEDEBUG(ifp, "resp = %d\n", xfer->resp);
 504         if (xfer->resp != 0)
 505                 ifp->if_oerrors ++;
 506
 507         m_freem(xfer->mbuf);
 508         fw_xfer_unload(xfer);
 509
 510         s = splimp();
 511         FWE_LOCK(fwe);
 512         STAILQ_INSERT_TAIL(&fwe->xferlist, xfer, link);
 513         FWE_UNLOCK(fwe);
 514         splx(s);
 515
 516         /* for queue full */
 517         if (ifp->if_snd.ifq_head != NULL)
 518                 fwe_start(ifp);
 519 }
 520
 521 static void
 522 fwe_start(struct ifnet *ifp)
 523 {
 524         struct fwe_softc *fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe;
 525         int s;
 526
 527         FWEDEBUG(ifp, "starting\n");
 528
 529         if (fwe->dma_ch < 0) {
 530                 struct mbuf     *m = NULL;
 531
 532                 FWEDEBUG(ifp, "not ready\n");
 533
 534                 s = splimp();
 535                 do {
 536                         IF_DEQUEUE(&ifp->if_snd, m);
 537                         if (m != NULL)
 538                                 m_freem(m);
 539                         ifp->if_oerrors ++;
 540                 } while (m != NULL);
 541                 splx(s);
 542
 543                 return;
 544         }
 545
 546         s = splimp();
 547 #if defined(__FreeBSD__)
 548         ifp->if_drv_flags |= IFF_DRV_OACTIVE;
 549 #else
 550         ifp->if_flags |= IFF_OACTIVE;
 551 #endif
 552
 553         if (ifp->if_snd.ifq_len != 0)
 554                 fwe_as_output(fwe, ifp);
 555
 556 #if defined(__FreeBSD__)
 557         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 558 #else
 559         ifp->if_flags &= ~IFF_OACTIVE;
 560 #endif
 561         splx(s);
 562 }
 563
 564 #define HDR_LEN 4
 565 #ifndef ETHER_ALIGN
 566 #define ETHER_ALIGN 2
 567 #endif
 568 /* Async. stream output */
 569 static void
 570 fwe_as_output(struct fwe_softc *fwe, struct ifnet *ifp)
 571 {
 572         struct mbuf *m;
 573         struct fw_xfer *xfer;
 574         struct fw_xferq *xferq;
 575         struct fw_pkt *fp;
 576         int i = 0;
 577
 578         xfer = NULL;
 579         xferq = fwe->fd.fc->atq;
 580         while ((xferq->queued < xferq->maxq - 1) &&
 581                         (ifp->if_snd.ifq_head != NULL)) {
 582                 FWE_LOCK(fwe);
 583                 xfer = STAILQ_FIRST(&fwe->xferlist);
 584                 if (xfer == NULL) {
 585 #if 0
 586                         printf("if_fwe: lack of xfer\n");
 587 #endif
 588                         FWE_UNLOCK(fwe);
 589                         break;
 590                 }
 591                 STAILQ_REMOVE_HEAD(&fwe->xferlist, link);
 592                 FWE_UNLOCK(fwe);
 593
 594                 IF_DEQUEUE(&ifp->if_snd, m);
 595                 if (m == NULL) {
 596                         FWE_LOCK(fwe);
 597                         STAILQ_INSERT_HEAD(&fwe->xferlist, xfer, link);
 598                         FWE_UNLOCK(fwe);
 599                         break;
 600                 }
 601 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 602                 if (ifp->if_bpf != NULL)
 603                         bpf_mtap(ifp, m);
 604 #else
 605                 BPF_MTAP(ifp, m);
 606 #endif
 607
 608                 /* keep ip packet alignment for alpha */
 609                 M_PREPEND(m, ETHER_ALIGN, M_NOWAIT);
 610                 fp = &xfer->send.hdr;
 611                 *(uint32_t *)&xfer->send.hdr = *(int32_t *)&fwe->pkt_hdr;
 612                 fp->mode.stream.len = m->m_pkthdr.len;
 613                 xfer->mbuf = m;
 614                 xfer->send.pay_len = m->m_pkthdr.len;
 615
 616                 if (fw_asyreq(fwe->fd.fc, -1, xfer) != 0) {
 617                         /* error */
 618                         ifp->if_oerrors ++;
 619                         /* XXX set error code */
 620                         fwe_output_callback(xfer);
 621                 } else {
 622                         ifp->if_opackets ++;
 623                         i++;
 624                 }
 625         }
 626 #if 0
 627         if (i > 1)
 628                 printf("%d queued\n", i);
 629 #endif
 630         if (i > 0)
 631                 xferq->start(fwe->fd.fc);
 632 }
 633
 634 /* Async. stream output */
 635 static void
 636 fwe_as_input(struct fw_xferq *xferq)
 637 {
 638         struct mbuf *m, *m0;
 639         struct ifnet *ifp;
 640         struct fwe_softc *fwe;
 641         struct fw_bulkxfer *sxfer;
 642         struct fw_pkt *fp;
 643         u_char *c;
 644 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 645         struct ether_header *eh;
 646 #endif
 647
 648         fwe = (struct fwe_softc *)xferq->sc;
 649         ifp = fwe->eth_softc.ifp;
 650
 651         /* We do not need a lock here because the bottom half is serialized */
 652         while ((sxfer = STAILQ_FIRST(&xferq->stvalid)) != NULL) {
 653                 STAILQ_REMOVE_HEAD(&xferq->stvalid, link);
 654                 fp = mtod(sxfer->mbuf, struct fw_pkt *);
 655                 if (fwe->fd.fc->irx_post != NULL)
 656                         fwe->fd.fc->irx_post(fwe->fd.fc, fp->mode.ld);
 657                 m = sxfer->mbuf;
 658
 659                 /* insert new rbuf */
 660                 sxfer->mbuf = m0 = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
 661                 if (m0 != NULL) {
 662                         m0->m_len = m0->m_pkthdr.len = m0->m_ext.ext_size;
 663                         STAILQ_INSERT_TAIL(&xferq->stfree, sxfer, link);
 664                 } else
 665                         printf("%s: m_getcl failed\n", __FUNCTION__);
 666
 667                 if (sxfer->resp != 0 || fp->mode.stream.len <
 668                     ETHER_ALIGN + sizeof(struct ether_header)) {
 669                         m_freem(m);
 670                         ifp->if_ierrors ++;
 671                         continue;
 672                 }
 673
 674                 m->m_data += HDR_LEN + ETHER_ALIGN;
 675                 c = mtod(m, u_char *);
 676 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 677                 eh = (struct ether_header *)c;
 678                 m->m_data += sizeof(struct ether_header);
 679                 m->m_len = m->m_pkthdr.len = fp->mode.stream.len - ETHER_ALIGN
 680                     - sizeof(struct ether_header);
 681 #else
 682                 m->m_len = m->m_pkthdr.len = fp->mode.stream.len - ETHER_ALIGN;
 683 #endif
 684                 m->m_pkthdr.rcvif = ifp;
 685 #if 0
 686                 FWEDEBUG(ifp, "%02x %02x %02x %02x %02x %02x\n"
 687                          "%02x %02x %02x %02x %02x %02x\n"
 688                          "%02x %02x %02x %02x\n"
 689                          "%02x %02x %02x %02x\n"
 690                          "%02x %02x %02x %02x\n"
 691                          "%02x %02x %02x %02x\n",
 692                          c[0], c[1], c[2], c[3], c[4], c[5],
 693                          c[6], c[7], c[8], c[9], c[10], c[11],
 694                          c[12], c[13], c[14], c[15],
 695                          c[16], c[17], c[18], c[19],
 696                          c[20], c[21], c[22], c[23],
 697                          c[20], c[21], c[22], c[23]
 698                  );
 699 #endif
 700 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 701                 ether_input(ifp, eh, m);
 702 #else
 703                 (*ifp->if_input)(ifp, m);
 704 #endif
 705                 ifp->if_ipackets ++;
 706         }
 707         if (STAILQ_FIRST(&xferq->stfree) != NULL)
 708                 fwe->fd.fc->irx_enable(fwe->fd.fc, fwe->dma_ch);
 709 }
 710
 711
 712 static devclass_t fwe_devclass;
 713
 714 static device_method_t fwe_methods[] = {
 715         /* device interface */
 716         DEVMETHOD(device_identify,      fwe_identify),
 717         DEVMETHOD(device_probe,         fwe_probe),
 718         DEVMETHOD(device_attach,        fwe_attach),
 719         DEVMETHOD(device_detach,        fwe_detach),
 720         { 0, 0 }
 721 };
 722
 723 static driver_t fwe_driver = {
 724         "fwe",
 725         fwe_methods,
 726         sizeof(struct fwe_softc),
 727 };
 728
 729
 730 #ifdef __DragonFly__
 731 DECLARE_DUMMY_MODULE(fwe);
 732 #endif
 733 DRIVER_MODULE(fwe, firewire, fwe_driver, fwe_devclass, 0, 0);
 734 MODULE_VERSION(fwe, 1);
 735 MODULE_DEPEND(fwe, firewire, 1, 1, 1);