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 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 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 void
 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;
 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 }
 121 #endif /* DEVICE_POLLING */
 122
 123 static void
 124 fwe_identify(driver_t *driver, device_t parent)
 125 {
 126         BUS_ADD_CHILD(parent, 0, "fwe", device_get_unit(parent));
 127 }
 128
 129 static int
 130 fwe_probe(device_t dev)
 131 {
 132         device_t pa;
 133
 134         pa = device_get_parent(dev);
 135         if(device_get_unit(dev) != device_get_unit(pa)){
 136                 return(ENXIO);
 137         }
 138
 139         device_set_desc(dev, "Ethernet over FireWire");
 140         return (0);
 141 }
 142
 143 static int
 144 fwe_attach(device_t dev)
 145 {
 146         struct fwe_softc *fwe;
 147         struct ifnet *ifp;
 148         int unit, s;
 149 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 150         u_char *eaddr;
 151 #else
 152         u_char eaddr[6];
 153 #endif
 154         struct fw_eui64 *eui;
 155
 156         fwe = ((struct fwe_softc *)device_get_softc(dev));
 157         unit = device_get_unit(dev);
 158
 159         bzero(fwe, sizeof(struct fwe_softc));
 160         mtx_init(&fwe->mtx, "fwe", NULL, MTX_DEF);
 161         /* XXX */
 162         fwe->stream_ch = stream_ch;
 163         fwe->dma_ch = -1;
 164
 165         fwe->fd.fc = device_get_ivars(dev);
 166         if (tx_speed < 0)
 167                 tx_speed = fwe->fd.fc->speed;
 168
 169         fwe->fd.dev = dev;
 170         fwe->fd.post_explore = NULL;
 171         fwe->eth_softc.fwe = fwe;
 172
 173         fwe->pkt_hdr.mode.stream.tcode = FWTCODE_STREAM;
 174         fwe->pkt_hdr.mode.stream.sy = 0;
 175         fwe->pkt_hdr.mode.stream.chtag = fwe->stream_ch;
 176
 177         /* generate fake MAC address: first and last 3bytes from eui64 */
 178 #define LOCAL (0x02)
 179 #define GROUP (0x01)
 180 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 181         eaddr = &IFP2ENADDR(fwe->eth_softc.ifp)[0];
 182 #endif
 183
 184
 185         eui = &fwe->fd.fc->eui;
 186         eaddr[0] = (FW_EUI64_BYTE(eui, 0) | LOCAL) & ~GROUP;
 187         eaddr[1] = FW_EUI64_BYTE(eui, 1);
 188         eaddr[2] = FW_EUI64_BYTE(eui, 2);
 189         eaddr[3] = FW_EUI64_BYTE(eui, 5);
 190         eaddr[4] = FW_EUI64_BYTE(eui, 6);
 191         eaddr[5] = FW_EUI64_BYTE(eui, 7);
 192         printf("if_fwe%d: Fake Ethernet address: "
 193                 "%02x:%02x:%02x:%02x:%02x:%02x\n", unit,
 194                 eaddr[0], eaddr[1], eaddr[2], eaddr[3], eaddr[4], eaddr[5]);
 195
 196         /* fill the rest and attach interface */
 197         ifp = fwe->eth_softc.ifp = if_alloc(IFT_ETHER);
 198         if (ifp == NULL) {
 199                 device_printf(dev, "can not if_alloc()\n");
 200                 return (ENOSPC);
 201         }
 202         ifp->if_softc = &fwe->eth_softc;
 203
 204 #if __FreeBSD_version >= 501113 || defined(__DragonFly__)
 205         if_initname(ifp, device_get_name(dev), unit);
 206 #else
 207         ifp->if_unit = unit;
 208         ifp->if_name = "fwe";
 209 #endif
 210         ifp->if_init = fwe_init;
 211 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 212         ifp->if_output = ether_output;
 213 #endif
 214         ifp->if_start = fwe_start;
 215         ifp->if_ioctl = fwe_ioctl;
 216         ifp->if_mtu = ETHERMTU;
 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 =
 361 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 362                                 m_getcl(M_WAIT, MT_DATA, M_PKTHDR);
 363 #else
 364                                 m_getcl(M_TRYWAIT, MT_DATA, M_PKTHDR);
 365 #endif
 366                         xferq->bulkxfer[i].mbuf = m;
 367                         if (m != NULL) {
 368                                 m->m_len = m->m_pkthdr.len = m->m_ext.ext_size;
 369                                 STAILQ_INSERT_TAIL(&xferq->stfree,
 370                                                 &xferq->bulkxfer[i], link);
 371                         } else
 372                                 printf("%s: m_getcl failed\n", __FUNCTION__);
 373                 }
 374                 STAILQ_INIT(&fwe->xferlist);
 375                 for (i = 0; i < TX_MAX_QUEUE; i++) {
 376                         xfer = fw_xfer_alloc(M_FWE);
 377                         if (xfer == NULL)
 378                                 break;
 379                         xfer->send.spd = tx_speed;
 380                         xfer->fc = fwe->fd.fc;
 381                         xfer->sc = (caddr_t)fwe;
 382                         xfer->hand = fwe_output_callback;
 383                         STAILQ_INSERT_TAIL(&fwe->xferlist, xfer, link);
 384                 }
 385         } else
 386                 xferq = fc->ir[fwe->dma_ch];
 387
 388
 389         /* start dma */
 390         if ((xferq->flag & FWXFERQ_RUNNING) == 0)
 391                 fc->irx_enable(fc, fwe->dma_ch);
 392
 393 #if defined(__FreeBSD__)
 394         ifp->if_drv_flags |= IFF_DRV_RUNNING;
 395         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 396 #else
 397         ifp->if_flags |= IFF_RUNNING;
 398         ifp->if_flags &= ~IFF_OACTIVE;
 399 #endif
 400
 401 #if 0
 402         /* attempt to start output */
 403         fwe_start(ifp);
 404 #endif
 405 }
 406
 407
 408 static int
 409 fwe_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 410 {
 411         struct fwe_softc *fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe;
 412         struct ifstat *ifs = NULL;
 413         int s, error, len;
 414
 415         switch (cmd) {
 416                 case SIOCSIFFLAGS:
 417                         s = splimp();
 418                         if (ifp->if_flags & IFF_UP) {
 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_init(&fwe->eth_softc);
 425                         } else {
 426 #if defined(__FreeBSD__)
 427                                 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 428 #else
 429                                 if (ifp->if_flags & IFF_RUNNING)
 430 #endif
 431                                         fwe_stop(fwe);
 432                         }
 433                         /* XXX keep promiscoud mode */
 434                         ifp->if_flags |= IFF_PROMISC;
 435                         splx(s);
 436                         break;
 437                 case SIOCADDMULTI:
 438                 case SIOCDELMULTI:
 439                         break;
 440
 441                 case SIOCGIFSTATUS:
 442                         s = splimp();
 443                         ifs = (struct ifstat *)data;
 444                         len = strlen(ifs->ascii);
 445                         if (len < sizeof(ifs->ascii))
 446                                 snprintf(ifs->ascii + len,
 447                                         sizeof(ifs->ascii) - len,
 448                                         "\tch %d dma %d\n",
 449                                                 fwe->stream_ch, fwe->dma_ch);
 450                         splx(s);
 451                         break;
 452                 case SIOCSIFCAP:
 453 #ifdef DEVICE_POLLING
 454                     {
 455                         struct ifreq *ifr = (struct ifreq *) data;
 456                         struct firewire_comm *fc = fc = fwe->fd.fc;
 457
 458                         if (ifr->ifr_reqcap & IFCAP_POLLING &&
 459                             !(ifp->if_capenable & IFCAP_POLLING)) {
 460                                 error = ether_poll_register(fwe_poll, ifp);
 461                                 if (error)
 462                                         return(error);
 463                                 /* Disable interrupts */
 464                                 fc->set_intr(fc, 0);
 465                                 ifp->if_capenable |= IFCAP_POLLING;
 466                                 return (error);
 467                         }
 468                         if (!(ifr->ifr_reqcap & IFCAP_POLLING) &&
 469                             ifp->if_capenable & IFCAP_POLLING) {
 470                                 error = ether_poll_deregister(ifp);
 471                                 /* Enable interrupts. */
 472                                 fc->set_intr(fc, 1);
 473                                 ifp->if_capenable &= ~IFCAP_POLLING;
 474                                 return (error);
 475                         }
 476                     }
 477 #endif /* DEVICE_POLLING */
 478                         break;
 479 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
 480                 default:
 481 #else
 482                 case SIOCSIFADDR:
 483                 case SIOCGIFADDR:
 484                 case SIOCSIFMTU:
 485 #endif
 486                         s = splimp();
 487                         error = ether_ioctl(ifp, cmd, data);
 488                         splx(s);
 489                         return (error);
 490 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 491                 default:
 492                         return (EINVAL);
 493 #endif
 494         }
 495
 496         return (0);
 497 }
 498
 499 static void
 500 fwe_output_callback(struct fw_xfer *xfer)
 501 {
 502         struct fwe_softc *fwe;
 503         struct ifnet *ifp;
 504         int s;
 505
 506         fwe = (struct fwe_softc *)xfer->sc;
 507         ifp = fwe->eth_softc.ifp;
 508         /* XXX error check */
 509         FWEDEBUG(ifp, "resp = %d\n", xfer->resp);
 510         if (xfer->resp != 0)
 511                 ifp->if_oerrors ++;
 512
 513         m_freem(xfer->mbuf);
 514         fw_xfer_unload(xfer);
 515
 516         s = splimp();
 517         FWE_LOCK(fwe);
 518         STAILQ_INSERT_TAIL(&fwe->xferlist, xfer, link);
 519         FWE_UNLOCK(fwe);
 520         splx(s);
 521
 522         /* for queue full */
 523         if (ifp->if_snd.ifq_head != NULL)
 524                 fwe_start(ifp);
 525 }
 526
 527 static void
 528 fwe_start(struct ifnet *ifp)
 529 {
 530         struct fwe_softc *fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe;
 531         int s;
 532
 533         FWEDEBUG(ifp, "starting\n");
 534
 535         if (fwe->dma_ch < 0) {
 536                 struct mbuf     *m = NULL;
 537
 538                 FWEDEBUG(ifp, "not ready\n");
 539
 540                 s = splimp();
 541                 do {
 542                         IF_DEQUEUE(&ifp->if_snd, m);
 543                         if (m != NULL)
 544                                 m_freem(m);
 545                         ifp->if_oerrors ++;
 546                 } while (m != NULL);
 547                 splx(s);
 548
 549                 return;
 550         }
 551
 552         s = splimp();
 553 #if defined(__FreeBSD__)
 554         ifp->if_drv_flags |= IFF_DRV_OACTIVE;
 555 #else
 556         ifp->if_flags |= IFF_OACTIVE;
 557 #endif
 558
 559         if (ifp->if_snd.ifq_len != 0)
 560                 fwe_as_output(fwe, ifp);
 561
 562 #if defined(__FreeBSD__)
 563         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 564 #else
 565         ifp->if_flags &= ~IFF_OACTIVE;
 566 #endif
 567         splx(s);
 568 }
 569
 570 #define HDR_LEN 4
 571 #ifndef ETHER_ALIGN
 572 #define ETHER_ALIGN 2
 573 #endif
 574 /* Async. stream output */
 575 static void
 576 fwe_as_output(struct fwe_softc *fwe, struct ifnet *ifp)
 577 {
 578         struct mbuf *m;
 579         struct fw_xfer *xfer;
 580         struct fw_xferq *xferq;
 581         struct fw_pkt *fp;
 582         int i = 0;
 583
 584         xfer = NULL;
 585         xferq = fwe->fd.fc->atq;
 586         while ((xferq->queued < xferq->maxq - 1) &&
 587                         (ifp->if_snd.ifq_head != NULL)) {
 588                 FWE_LOCK(fwe);
 589                 xfer = STAILQ_FIRST(&fwe->xferlist);
 590                 if (xfer == NULL) {
 591 #if 0
 592                         printf("if_fwe: lack of xfer\n");
 593 #endif
 594                         FWE_UNLOCK(fwe);
 595                         break;
 596                 }
 597                 STAILQ_REMOVE_HEAD(&fwe->xferlist, link);
 598                 FWE_UNLOCK(fwe);
 599
 600                 IF_DEQUEUE(&ifp->if_snd, m);
 601                 if (m == NULL) {
 602                         FWE_LOCK(fwe);
 603                         STAILQ_INSERT_HEAD(&fwe->xferlist, xfer, link);
 604                         FWE_UNLOCK(fwe);
 605                         break;
 606                 }
 607 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 608                 if (ifp->if_bpf != NULL)
 609                         bpf_mtap(ifp, m);
 610 #else
 611                 BPF_MTAP(ifp, m);
 612 #endif
 613
 614                 /* keep ip packet alignment for alpha */
 615                 M_PREPEND(m, ETHER_ALIGN, M_DONTWAIT);
 616                 fp = &xfer->send.hdr;
 617                 *(uint32_t *)&xfer->send.hdr = *(int32_t *)&fwe->pkt_hdr;
 618                 fp->mode.stream.len = m->m_pkthdr.len;
 619                 xfer->mbuf = m;
 620                 xfer->send.pay_len = m->m_pkthdr.len;
 621
 622                 if (fw_asyreq(fwe->fd.fc, -1, xfer) != 0) {
 623                         /* error */
 624                         ifp->if_oerrors ++;
 625                         /* XXX set error code */
 626                         fwe_output_callback(xfer);
 627                 } else {
 628                         ifp->if_opackets ++;
 629                         i++;
 630                 }
 631         }
 632 #if 0
 633         if (i > 1)
 634                 printf("%d queued\n", i);
 635 #endif
 636         if (i > 0)
 637                 xferq->start(fwe->fd.fc);
 638 }
 639
 640 /* Async. stream output */
 641 static void
 642 fwe_as_input(struct fw_xferq *xferq)
 643 {
 644         struct mbuf *m, *m0;
 645         struct ifnet *ifp;
 646         struct fwe_softc *fwe;
 647         struct fw_bulkxfer *sxfer;
 648         struct fw_pkt *fp;
 649         u_char *c;
 650 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 651         struct ether_header *eh;
 652 #endif
 653
 654         fwe = (struct fwe_softc *)xferq->sc;
 655         ifp = fwe->eth_softc.ifp;
 656
 657         /* We do not need a lock here because the bottom half is serialized */
 658         while ((sxfer = STAILQ_FIRST(&xferq->stvalid)) != NULL) {
 659                 STAILQ_REMOVE_HEAD(&xferq->stvalid, link);
 660                 fp = mtod(sxfer->mbuf, struct fw_pkt *);
 661                 if (fwe->fd.fc->irx_post != NULL)
 662                         fwe->fd.fc->irx_post(fwe->fd.fc, fp->mode.ld);
 663                 m = sxfer->mbuf;
 664
 665                 /* insert new rbuf */
 666                 sxfer->mbuf = m0 = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
 667                 if (m0 != NULL) {
 668                         m0->m_len = m0->m_pkthdr.len = m0->m_ext.ext_size;
 669                         STAILQ_INSERT_TAIL(&xferq->stfree, sxfer, link);
 670                 } else
 671                         printf("%s: m_getcl failed\n", __FUNCTION__);
 672
 673                 if (sxfer->resp != 0 || fp->mode.stream.len <
 674                     ETHER_ALIGN + sizeof(struct ether_header)) {
 675                         m_freem(m);
 676                         ifp->if_ierrors ++;
 677                         continue;
 678                 }
 679
 680                 m->m_data += HDR_LEN + ETHER_ALIGN;
 681                 c = mtod(m, u_char *);
 682 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 683                 eh = (struct ether_header *)c;
 684                 m->m_data += sizeof(struct ether_header);
 685                 m->m_len = m->m_pkthdr.len = fp->mode.stream.len - ETHER_ALIGN
 686                     - sizeof(struct ether_header);
 687 #else
 688                 m->m_len = m->m_pkthdr.len = fp->mode.stream.len - ETHER_ALIGN;
 689 #endif
 690                 m->m_pkthdr.rcvif = ifp;
 691 #if 0
 692                 FWEDEBUG(ifp, "%02x %02x %02x %02x %02x %02x\n"
 693                          "%02x %02x %02x %02x %02x %02x\n"
 694                          "%02x %02x %02x %02x\n"
 695                          "%02x %02x %02x %02x\n"
 696                          "%02x %02x %02x %02x\n"
 697                          "%02x %02x %02x %02x\n",
 698                          c[0], c[1], c[2], c[3], c[4], c[5],
 699                          c[6], c[7], c[8], c[9], c[10], c[11],
 700                          c[12], c[13], c[14], c[15],
 701                          c[16], c[17], c[18], c[19],
 702                          c[20], c[21], c[22], c[23],
 703                          c[20], c[21], c[22], c[23]
 704                  );
 705 #endif
 706 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 707                 ether_input(ifp, eh, m);
 708 #else
 709                 (*ifp->if_input)(ifp, m);
 710 #endif
 711                 ifp->if_ipackets ++;
 712         }
 713         if (STAILQ_FIRST(&xferq->stfree) != NULL)
 714                 fwe->fd.fc->irx_enable(fwe->fd.fc, fwe->dma_ch);
 715 }
 716
 717
 718 static devclass_t fwe_devclass;
 719
 720 static device_method_t fwe_methods[] = {
 721         /* device interface */
 722         DEVMETHOD(device_identify,      fwe_identify),
 723         DEVMETHOD(device_probe,         fwe_probe),
 724         DEVMETHOD(device_attach,        fwe_attach),
 725         DEVMETHOD(device_detach,        fwe_detach),
 726         { 0, 0 }
 727 };
 728
 729 static driver_t fwe_driver = {
 730         "fwe",
 731         fwe_methods,
 732         sizeof(struct fwe_softc),
 733 };
 734
 735
 736 #ifdef __DragonFly__
 737 DECLARE_DUMMY_MODULE(fwe);
 738 #endif
 739 DRIVER_MODULE(fwe, firewire, fwe_driver, fwe_devclass, 0, 0);
 740 MODULE_VERSION(fwe, 1);
 741 MODULE_DEPEND(fwe, firewire, 1, 1, 1);