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_mtu = ETHERMTU;
 218         ifp->if_flags = (IFF_BROADCAST|IFF_SIMPLEX|IFF_MULTICAST);
 219         ifp->if_snd.ifq_maxlen = TX_MAX_QUEUE;
 220
 221         s = splimp();
 222 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 223         ether_ifattach(ifp, 1);
 224 #else
 225         ether_ifattach(ifp, eaddr);
 226 #endif
 227         splx(s);
 228
 229         /* Tell the upper layer(s) we support long frames. */
 230         ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header);
 231 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
 232         ifp->if_capabilities |= IFCAP_VLAN_MTU | IFCAP_POLLING;
 233         ifp->if_capenable |= IFCAP_VLAN_MTU;
 234 #endif
 235
 236
 237         FWEDEBUG(ifp, "interface created\n");
 238         return 0;
 239 }
 240
 241 static void
 242 fwe_stop(struct fwe_softc *fwe)
 243 {
 244         struct firewire_comm *fc;
 245         struct fw_xferq *xferq;
 246         struct ifnet *ifp = fwe->eth_softc.ifp;
 247         struct fw_xfer *xfer, *next;
 248         int i;
 249
 250         fc = fwe->fd.fc;
 251
 252         if (fwe->dma_ch >= 0) {
 253                 xferq = fc->ir[fwe->dma_ch];
 254
 255                 if (xferq->flag & FWXFERQ_RUNNING)
 256                         fc->irx_disable(fc, fwe->dma_ch);
 257                 xferq->flag &=
 258                         ~(FWXFERQ_MODEMASK | FWXFERQ_OPEN | FWXFERQ_STREAM |
 259                         FWXFERQ_EXTBUF | FWXFERQ_HANDLER | FWXFERQ_CHTAGMASK);
 260                 xferq->hand =  NULL;
 261
 262                 for (i = 0; i < xferq->bnchunk; i ++)
 263                         m_freem(xferq->bulkxfer[i].mbuf);
 264                 free(xferq->bulkxfer, M_FWE);
 265
 266                 for (xfer = STAILQ_FIRST(&fwe->xferlist); xfer != NULL;
 267                                         xfer = next) {
 268                         next = STAILQ_NEXT(xfer, link);
 269                         fw_xfer_free(xfer);
 270                 }
 271                 STAILQ_INIT(&fwe->xferlist);
 272
 273                 xferq->bulkxfer =  NULL;
 274                 fwe->dma_ch = -1;
 275         }
 276
 277 #if defined(__FreeBSD__)
 278         ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
 279 #else
 280         ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
 281 #endif
 282 }
 283
 284 static int
 285 fwe_detach(device_t dev)
 286 {
 287         struct fwe_softc *fwe;
 288         struct ifnet *ifp;
 289         int s;
 290
 291         fwe = device_get_softc(dev);
 292         ifp = fwe->eth_softc.ifp;
 293
 294 #ifdef DEVICE_POLLING
 295         if (ifp->if_capenable & IFCAP_POLLING)
 296                 ether_poll_deregister(ifp);
 297 #endif
 298         s = splimp();
 299
 300         fwe_stop(fwe);
 301 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 302         ether_ifdetach(ifp, 1);
 303 #else
 304         ether_ifdetach(ifp);
 305         if_free(ifp);
 306 #endif
 307
 308         splx(s);
 309         mtx_destroy(&fwe->mtx);
 310         return 0;
 311 }
 312
 313 static void
 314 fwe_init(void *arg)
 315 {
 316         struct fwe_softc *fwe = ((struct fwe_eth_softc *)arg)->fwe;
 317         struct firewire_comm *fc;
 318         struct ifnet *ifp = fwe->eth_softc.ifp;
 319         struct fw_xferq *xferq;
 320         struct fw_xfer *xfer;
 321         struct mbuf *m;
 322         int i;
 323
 324         FWEDEBUG(ifp, "initializing\n");
 325
 326         /* XXX keep promiscoud mode */
 327         ifp->if_flags |= IFF_PROMISC;
 328
 329         fc = fwe->fd.fc;
 330         if (fwe->dma_ch < 0) {
 331                 fwe->dma_ch = fw_open_isodma(fc, /* tx */0);
 332                 if (fwe->dma_ch < 0)
 333                         return;
 334                 xferq = fc->ir[fwe->dma_ch];
 335                 xferq->flag |= FWXFERQ_EXTBUF |
 336                                 FWXFERQ_HANDLER | FWXFERQ_STREAM;
 337                 fwe->stream_ch = stream_ch;
 338                 fwe->pkt_hdr.mode.stream.chtag = fwe->stream_ch;
 339                 xferq->flag &= ~0xff;
 340                 xferq->flag |= fwe->stream_ch & 0xff;
 341                 /* register fwe_input handler */
 342                 xferq->sc = (caddr_t) fwe;
 343                 xferq->hand = fwe_as_input;
 344                 xferq->bnchunk = rx_queue_len;
 345                 xferq->bnpacket = 1;
 346                 xferq->psize = MCLBYTES;
 347                 xferq->queued = 0;
 348                 xferq->buf = NULL;
 349                 xferq->bulkxfer = (struct fw_bulkxfer *) malloc(
 350                         sizeof(struct fw_bulkxfer) * xferq->bnchunk,
 351                                                         M_FWE, M_WAITOK);
 352                 if (xferq->bulkxfer == NULL) {
 353                         printf("if_fwe: malloc failed\n");
 354                         return;
 355                 }
 356                 STAILQ_INIT(&xferq->stvalid);
 357                 STAILQ_INIT(&xferq->stfree);
 358                 STAILQ_INIT(&xferq->stdma);
 359                 xferq->stproc = NULL;
 360                 for (i = 0; i < xferq->bnchunk; i ++) {
 361                         m = m_getcl(M_WAITOK, MT_DATA, M_PKTHDR);
 362                         xferq->bulkxfer[i].mbuf = m;
 363                         m->m_len = m->m_pkthdr.len = m->m_ext.ext_size;
 364                         STAILQ_INSERT_TAIL(&xferq->stfree,
 365                                         &xferq->bulkxfer[i], link);
 366                 }
 367                 STAILQ_INIT(&fwe->xferlist);
 368                 for (i = 0; i < TX_MAX_QUEUE; i++) {
 369                         xfer = fw_xfer_alloc(M_FWE);
 370                         if (xfer == NULL)
 371                                 break;
 372                         xfer->send.spd = tx_speed;
 373                         xfer->fc = fwe->fd.fc;
 374                         xfer->sc = (caddr_t)fwe;
 375                         xfer->hand = fwe_output_callback;
 376                         STAILQ_INSERT_TAIL(&fwe->xferlist, xfer, link);
 377                 }
 378         } else
 379                 xferq = fc->ir[fwe->dma_ch];
 380
 381
 382         /* start dma */
 383         if ((xferq->flag & FWXFERQ_RUNNING) == 0)
 384                 fc->irx_enable(fc, fwe->dma_ch);
 385
 386 #if defined(__FreeBSD__)
 387         ifp->if_drv_flags |= IFF_DRV_RUNNING;
 388         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 389 #else
 390         ifp->if_flags |= IFF_RUNNING;
 391         ifp->if_flags &= ~IFF_OACTIVE;
 392 #endif
 393
 394 #if 0
 395         /* attempt to start output */
 396         fwe_start(ifp);
 397 #endif
 398 }
 399
 400
 401 static int
 402 fwe_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 403 {
 404         struct fwe_softc *fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe;
 405         struct ifstat *ifs = NULL;
 406         int s, error, len;
 407
 408         switch (cmd) {
 409                 case SIOCSIFFLAGS:
 410                         s = splimp();
 411                         if (ifp->if_flags & IFF_UP) {
 412 #if defined(__FreeBSD__)
 413                                 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
 414 #else
 415                                 if (!(ifp->if_flags & IFF_RUNNING))
 416 #endif
 417                                         fwe_init(&fwe->eth_softc);
 418                         } else {
 419 #if defined(__FreeBSD__)
 420                                 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 421 #else
 422                                 if (ifp->if_flags & IFF_RUNNING)
 423 #endif
 424                                         fwe_stop(fwe);
 425                         }
 426                         /* XXX keep promiscoud mode */
 427                         ifp->if_flags |= IFF_PROMISC;
 428                         splx(s);
 429                         break;
 430                 case SIOCADDMULTI:
 431                 case SIOCDELMULTI:
 432                         break;
 433
 434                 case SIOCGIFSTATUS:
 435                         s = splimp();
 436                         ifs = (struct ifstat *)data;
 437                         len = strlen(ifs->ascii);
 438                         if (len < sizeof(ifs->ascii))
 439                                 snprintf(ifs->ascii + len,
 440                                         sizeof(ifs->ascii) - len,
 441                                         "\tch %d dma %d\n",
 442                                                 fwe->stream_ch, fwe->dma_ch);
 443                         splx(s);
 444                         break;
 445                 case SIOCSIFCAP:
 446 #ifdef DEVICE_POLLING
 447                     {
 448                         struct ifreq *ifr = (struct ifreq *) data;
 449                         struct firewire_comm *fc = fwe->fd.fc;
 450
 451                         if (ifr->ifr_reqcap & IFCAP_POLLING &&
 452                             !(ifp->if_capenable & IFCAP_POLLING)) {
 453                                 error = ether_poll_register(fwe_poll, ifp);
 454                                 if (error)
 455                                         return(error);
 456                                 /* Disable interrupts */
 457                                 fc->set_intr(fc, 0);
 458                                 ifp->if_capenable |= IFCAP_POLLING;
 459                                 ifp->if_capenable |= IFCAP_POLLING_NOCOUNT;
 460                                 return (error);
 461                         }
 462                         if (!(ifr->ifr_reqcap & IFCAP_POLLING) &&
 463                             ifp->if_capenable & IFCAP_POLLING) {
 464                                 error = ether_poll_deregister(ifp);
 465                                 /* Enable interrupts. */
 466                                 fc->set_intr(fc, 1);
 467                                 ifp->if_capenable &= ~IFCAP_POLLING;
 468                                 ifp->if_capenable &= ~IFCAP_POLLING_NOCOUNT;
 469                                 return (error);
 470                         }
 471                     }
 472 #endif /* DEVICE_POLLING */
 473                         break;
 474 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
 475                 default:
 476 #else
 477                 case SIOCSIFADDR:
 478                 case SIOCGIFADDR:
 479                 case SIOCSIFMTU:
 480 #endif
 481                         s = splimp();
 482                         error = ether_ioctl(ifp, cmd, data);
 483                         splx(s);
 484                         return (error);
 485 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 486                 default:
 487                         return (EINVAL);
 488 #endif
 489         }
 490
 491         return (0);
 492 }
 493
 494 static void
 495 fwe_output_callback(struct fw_xfer *xfer)
 496 {
 497         struct fwe_softc *fwe;
 498         struct ifnet *ifp;
 499         int s;
 500
 501         fwe = (struct fwe_softc *)xfer->sc;
 502         ifp = fwe->eth_softc.ifp;
 503         /* XXX error check */
 504         FWEDEBUG(ifp, "resp = %d\n", xfer->resp);
 505         if (xfer->resp != 0)
 506                 ifp->if_oerrors ++;
 507
 508         m_freem(xfer->mbuf);
 509         fw_xfer_unload(xfer);
 510
 511         s = splimp();
 512         FWE_LOCK(fwe);
 513         STAILQ_INSERT_TAIL(&fwe->xferlist, xfer, link);
 514         FWE_UNLOCK(fwe);
 515         splx(s);
 516
 517         /* for queue full */
 518         if (ifp->if_snd.ifq_head != NULL)
 519                 fwe_start(ifp);
 520 }
 521
 522 static void
 523 fwe_start(struct ifnet *ifp)
 524 {
 525         struct fwe_softc *fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe;
 526         int s;
 527
 528         FWEDEBUG(ifp, "starting\n");
 529
 530         if (fwe->dma_ch < 0) {
 531                 struct mbuf     *m = NULL;
 532
 533                 FWEDEBUG(ifp, "not ready\n");
 534
 535                 s = splimp();
 536                 do {
 537                         IF_DEQUEUE(&ifp->if_snd, m);
 538                         if (m != NULL)
 539                                 m_freem(m);
 540                         ifp->if_oerrors ++;
 541                 } while (m != NULL);
 542                 splx(s);
 543
 544                 return;
 545         }
 546
 547         s = splimp();
 548 #if defined(__FreeBSD__)
 549         ifp->if_drv_flags |= IFF_DRV_OACTIVE;
 550 #else
 551         ifp->if_flags |= IFF_OACTIVE;
 552 #endif
 553
 554         if (ifp->if_snd.ifq_len != 0)
 555                 fwe_as_output(fwe, ifp);
 556
 557 #if defined(__FreeBSD__)
 558         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 559 #else
 560         ifp->if_flags &= ~IFF_OACTIVE;
 561 #endif
 562         splx(s);
 563 }
 564
 565 #define HDR_LEN 4
 566 #ifndef ETHER_ALIGN
 567 #define ETHER_ALIGN 2
 568 #endif
 569 /* Async. stream output */
 570 static void
 571 fwe_as_output(struct fwe_softc *fwe, struct ifnet *ifp)
 572 {
 573         struct mbuf *m;
 574         struct fw_xfer *xfer;
 575         struct fw_xferq *xferq;
 576         struct fw_pkt *fp;
 577         int i = 0;
 578
 579         xfer = NULL;
 580         xferq = fwe->fd.fc->atq;
 581         while ((xferq->queued < xferq->maxq - 1) &&
 582                         (ifp->if_snd.ifq_head != NULL)) {
 583                 FWE_LOCK(fwe);
 584                 xfer = STAILQ_FIRST(&fwe->xferlist);
 585                 if (xfer == NULL) {
 586 #if 0
 587                         printf("if_fwe: lack of xfer\n");
 588 #endif
 589                         FWE_UNLOCK(fwe);
 590                         break;
 591                 }
 592                 STAILQ_REMOVE_HEAD(&fwe->xferlist, link);
 593                 FWE_UNLOCK(fwe);
 594
 595                 IF_DEQUEUE(&ifp->if_snd, m);
 596                 if (m == NULL) {
 597                         FWE_LOCK(fwe);
 598                         STAILQ_INSERT_HEAD(&fwe->xferlist, xfer, link);
 599                         FWE_UNLOCK(fwe);
 600                         break;
 601                 }
 602 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 603                 if (ifp->if_bpf != NULL)
 604                         bpf_mtap(ifp, m);
 605 #else
 606                 BPF_MTAP(ifp, m);
 607 #endif
 608
 609                 /* keep ip packet alignment for alpha */
 610                 M_PREPEND(m, ETHER_ALIGN, M_NOWAIT);
 611                 fp = &xfer->send.hdr;
 612                 *(uint32_t *)&xfer->send.hdr = *(int32_t *)&fwe->pkt_hdr;
 613                 fp->mode.stream.len = m->m_pkthdr.len;
 614                 xfer->mbuf = m;
 615                 xfer->send.pay_len = m->m_pkthdr.len;
 616
 617                 if (fw_asyreq(fwe->fd.fc, -1, xfer) != 0) {
 618                         /* error */
 619                         ifp->if_oerrors ++;
 620                         /* XXX set error code */
 621                         fwe_output_callback(xfer);
 622                 } else {
 623                         ifp->if_opackets ++;
 624                         i++;
 625                 }
 626         }
 627 #if 0
 628         if (i > 1)
 629                 printf("%d queued\n", i);
 630 #endif
 631         if (i > 0)
 632                 xferq->start(fwe->fd.fc);
 633 }
 634
 635 /* Async. stream output */
 636 static void
 637 fwe_as_input(struct fw_xferq *xferq)
 638 {
 639         struct mbuf *m, *m0;
 640         struct ifnet *ifp;
 641         struct fwe_softc *fwe;
 642         struct fw_bulkxfer *sxfer;
 643         struct fw_pkt *fp;
 644         u_char *c;
 645 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 646         struct ether_header *eh;
 647 #endif
 648
 649         fwe = (struct fwe_softc *)xferq->sc;
 650         ifp = fwe->eth_softc.ifp;
 651
 652         /* We do not need a lock here because the bottom half is serialized */
 653         while ((sxfer = STAILQ_FIRST(&xferq->stvalid)) != NULL) {
 654                 STAILQ_REMOVE_HEAD(&xferq->stvalid, link);
 655                 fp = mtod(sxfer->mbuf, struct fw_pkt *);
 656                 if (fwe->fd.fc->irx_post != NULL)
 657                         fwe->fd.fc->irx_post(fwe->fd.fc, fp->mode.ld);
 658                 m = sxfer->mbuf;
 659
 660                 /* insert new rbuf */
 661                 sxfer->mbuf = m0 = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
 662                 if (m0 != NULL) {
 663                         m0->m_len = m0->m_pkthdr.len = m0->m_ext.ext_size;
 664                         STAILQ_INSERT_TAIL(&xferq->stfree, sxfer, link);
 665                 } else
 666                         printf("%s: m_getcl failed\n", __FUNCTION__);
 667
 668                 if (sxfer->resp != 0 || fp->mode.stream.len <
 669                     ETHER_ALIGN + sizeof(struct ether_header)) {
 670                         m_freem(m);
 671                         ifp->if_ierrors ++;
 672                         continue;
 673                 }
 674
 675                 m->m_data += HDR_LEN + ETHER_ALIGN;
 676                 c = mtod(m, u_char *);
 677 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 678                 eh = (struct ether_header *)c;
 679                 m->m_data += sizeof(struct ether_header);
 680                 m->m_len = m->m_pkthdr.len = fp->mode.stream.len - ETHER_ALIGN
 681                     - sizeof(struct ether_header);
 682 #else
 683                 m->m_len = m->m_pkthdr.len = fp->mode.stream.len - ETHER_ALIGN;
 684 #endif
 685                 m->m_pkthdr.rcvif = ifp;
 686 #if 0
 687                 FWEDEBUG(ifp, "%02x %02x %02x %02x %02x %02x\n"
 688                          "%02x %02x %02x %02x %02x %02x\n"
 689                          "%02x %02x %02x %02x\n"
 690                          "%02x %02x %02x %02x\n"
 691                          "%02x %02x %02x %02x\n"
 692                          "%02x %02x %02x %02x\n",
 693                          c[0], c[1], c[2], c[3], c[4], c[5],
 694                          c[6], c[7], c[8], c[9], c[10], c[11],
 695                          c[12], c[13], c[14], c[15],
 696                          c[16], c[17], c[18], c[19],
 697                          c[20], c[21], c[22], c[23],
 698                          c[20], c[21], c[22], c[23]
 699                  );
 700 #endif
 701 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 702                 ether_input(ifp, eh, m);
 703 #else
 704                 (*ifp->if_input)(ifp, m);
 705 #endif
 706                 ifp->if_ipackets ++;
 707         }
 708         if (STAILQ_FIRST(&xferq->stfree) != NULL)
 709                 fwe->fd.fc->irx_enable(fwe->fd.fc, fwe->dma_ch);
 710 }
 711
 712
 713 static devclass_t fwe_devclass;
 714
 715 static device_method_t fwe_methods[] = {
 716         /* device interface */
 717         DEVMETHOD(device_identify,      fwe_identify),
 718         DEVMETHOD(device_probe,         fwe_probe),
 719         DEVMETHOD(device_attach,        fwe_attach),
 720         DEVMETHOD(device_detach,        fwe_detach),
 721         { 0, 0 }
 722 };
 723
 724 static driver_t fwe_driver = {
 725         "fwe",
 726         fwe_methods,
 727         sizeof(struct fwe_softc),
 728 };
 729
 730
 731 #ifdef __DragonFly__
 732 DECLARE_DUMMY_MODULE(fwe);
 733 #endif
 734 DRIVER_MODULE(fwe, firewire, fwe_driver, fwe_devclass, 0, 0);
 735 MODULE_VERSION(fwe, 1);
 736 MODULE_DEPEND(fwe, firewire, 1, 1, 1);