sys/dev/firewire/if_fwe.c

   1 /*-
   2  * Copyright (c) 2002-2003
   3  *      Hidetoshi Shimokawa. All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *
  16  *      This product includes software developed by Hidetoshi Shimokawa.
  17  *
  18  * 4. Neither the name of the author nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $FreeBSD$
  35  */
  36
  37 #ifdef HAVE_KERNEL_OPTION_HEADERS
  38 #include "opt_device_polling.h"
  39 #include "opt_inet.h"
  40 #endif
  41
  42 #include <sys/param.h>
  43 #include <sys/kernel.h>
  44 #include <sys/malloc.h>
  45 #include <sys/mbuf.h>
  46 #include <sys/socket.h>
  47 #include <sys/sockio.h>
  48 #include <sys/sysctl.h>
  49 #include <sys/systm.h>
  50 #include <sys/module.h>
  51 #include <sys/bus.h>
  52 #include <machine/bus.h>
  53
  54 #include <net/bpf.h>
  55 #include <net/ethernet.h>
  56 #include <net/if.h>
  57 #include <net/if_var.h>
  58 #include <net/if_arp.h>
  59 #include <net/if_types.h>
  60 #ifdef __DragonFly__
  61 #include <net/vlan/if_vlan_var.h>
  62 #include <bus/firewire/firewire.h>
  63 #include <bus/firewire/firewirereg.h>
  64 #include "if_fwevar.h"
  65 #else
  66 #include <net/if_vlan_var.h>
  67
  68 #include <dev/firewire/firewire.h>
  69 #include <dev/firewire/firewirereg.h>
  70 #include <dev/firewire/if_fwevar.h>
  71 #endif
  72
  73 #define FWEDEBUG        if (fwedebug) if_printf
  74 #define TX_MAX_QUEUE    (FWMAXQUEUE - 1)
  75
  76 /* network interface */
  77 static void fwe_start (struct ifnet *);
  78 static int fwe_ioctl (struct ifnet *, u_long, caddr_t);
  79 static void fwe_init (void *);
  80
  81 static void fwe_output_callback (struct fw_xfer *);
  82 static void fwe_as_output (struct fwe_softc *, struct ifnet *);
  83 static void fwe_as_input (struct fw_xferq *);
  84
  85 static int fwedebug = 0;
  86 static int stream_ch = 1;
  87 static int tx_speed = 2;
  88 static int rx_queue_len = FWMAXQUEUE;
  89
  90 static MALLOC_DEFINE(M_FWE, "if_fwe", "Ethernet over FireWire interface");
  91 SYSCTL_INT(_debug, OID_AUTO, if_fwe_debug, CTLFLAG_RW, &fwedebug, 0, "");
  92 SYSCTL_DECL(_hw_firewire);
  93 static SYSCTL_NODE(_hw_firewire, OID_AUTO, fwe, CTLFLAG_RD, 0,
  94         "Ethernet emulation subsystem");
  95 SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, stream_ch, CTLFLAG_RW, &stream_ch, 0,
  96         "Stream channel to use");
  97 SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, tx_speed, CTLFLAG_RW, &tx_speed, 0,
  98         "Transmission speed");
  99 SYSCTL_INT(_hw_firewire_fwe, OID_AUTO, rx_queue_len, CTLFLAG_RW, &rx_queue_len,
 100         0, "Length of the receive queue");
 101
 102 TUNABLE_INT("hw.firewire.fwe.stream_ch", &stream_ch);
 103 TUNABLE_INT("hw.firewire.fwe.tx_speed", &tx_speed);
 104 TUNABLE_INT("hw.firewire.fwe.rx_queue_len", &rx_queue_len);
 105
 106 #ifdef DEVICE_POLLING
 107 static poll_handler_t fwe_poll;
 108
 109 static int
 110 fwe_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
 111 {
 112         struct fwe_softc *fwe;
 113         struct firewire_comm *fc;
 114
 115         if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
 116                 return (0);
 117
 118         fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe;
 119         fc = fwe->fd.fc;
 120         fc->poll(fc, (cmd == POLL_AND_CHECK_STATUS)?0:1, count);
 121         return (0);
 122 }
 123 #endif /* DEVICE_POLLING */
 124
 125 static void
 126 fwe_identify(driver_t *driver, device_t parent)
 127 {
 128         BUS_ADD_CHILD(parent, 0, "fwe", device_get_unit(parent));
 129 }
 130
 131 static int
 132 fwe_probe(device_t dev)
 133 {
 134         device_t pa;
 135
 136         pa = device_get_parent(dev);
 137         if(device_get_unit(dev) != device_get_unit(pa)){
 138                 return(ENXIO);
 139         }
 140
 141         device_set_desc(dev, "Ethernet over FireWire");
 142         return (0);
 143 }
 144
 145 static int
 146 fwe_attach(device_t dev)
 147 {
 148         struct fwe_softc *fwe;
 149         struct ifnet *ifp;
 150         int unit, s;
 151 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 152         u_char *eaddr;
 153 #else
 154         u_char eaddr[6];
 155 #endif
 156         struct fw_eui64 *eui;
 157
 158         fwe = ((struct fwe_softc *)device_get_softc(dev));
 159         unit = device_get_unit(dev);
 160
 161         bzero(fwe, sizeof(struct fwe_softc));
 162         mtx_init(&fwe->mtx, "fwe", NULL, MTX_DEF);
 163         /* XXX */
 164         fwe->stream_ch = stream_ch;
 165         fwe->dma_ch = -1;
 166
 167         fwe->fd.fc = device_get_ivars(dev);
 168         if (tx_speed < 0)
 169                 tx_speed = fwe->fd.fc->speed;
 170
 171         fwe->fd.dev = dev;
 172         fwe->fd.post_explore = NULL;
 173         fwe->eth_softc.fwe = fwe;
 174
 175         fwe->pkt_hdr.mode.stream.tcode = FWTCODE_STREAM;
 176         fwe->pkt_hdr.mode.stream.sy = 0;
 177         fwe->pkt_hdr.mode.stream.chtag = fwe->stream_ch;
 178
 179         /* generate fake MAC address: first and last 3bytes from eui64 */
 180 #define LOCAL (0x02)
 181 #define GROUP (0x01)
 182 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 183         eaddr = &IFP2ENADDR(fwe->eth_softc.ifp)[0];
 184 #endif
 185
 186
 187         eui = &fwe->fd.fc->eui;
 188         eaddr[0] = (FW_EUI64_BYTE(eui, 0) | LOCAL) & ~GROUP;
 189         eaddr[1] = FW_EUI64_BYTE(eui, 1);
 190         eaddr[2] = FW_EUI64_BYTE(eui, 2);
 191         eaddr[3] = FW_EUI64_BYTE(eui, 5);
 192         eaddr[4] = FW_EUI64_BYTE(eui, 6);
 193         eaddr[5] = FW_EUI64_BYTE(eui, 7);
 194         printf("if_fwe%d: Fake Ethernet address: "
 195                 "%02x:%02x:%02x:%02x:%02x:%02x\n", unit,
 196                 eaddr[0], eaddr[1], eaddr[2], eaddr[3], eaddr[4], eaddr[5]);
 197
 198         /* fill the rest and attach interface */
 199         ifp = fwe->eth_softc.ifp = if_alloc(IFT_ETHER);
 200         if (ifp == NULL) {
 201                 device_printf(dev, "can not if_alloc()\n");
 202                 return (ENOSPC);
 203         }
 204         ifp->if_softc = &fwe->eth_softc;
 205
 206 #if __FreeBSD_version >= 501113 || defined(__DragonFly__)
 207         if_initname(ifp, device_get_name(dev), unit);
 208 #else
 209         ifp->if_unit = unit;
 210         ifp->if_name = "fwe";
 211 #endif
 212         ifp->if_init = fwe_init;
 213 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 214         ifp->if_output = ether_output;
 215 #endif
 216         ifp->if_start = fwe_start;
 217         ifp->if_ioctl = fwe_ioctl;
 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;
 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                         snprintf(ifs->ascii, sizeof(ifs->ascii),
 438                             "\tch %d dma %d\n", fwe->stream_ch, fwe->dma_ch);
 439                         splx(s);
 440                         break;
 441                 case SIOCSIFCAP:
 442 #ifdef DEVICE_POLLING
 443                     {
 444                         struct ifreq *ifr = (struct ifreq *) data;
 445                         struct firewire_comm *fc = fwe->fd.fc;
 446
 447                         if (ifr->ifr_reqcap & IFCAP_POLLING &&
 448                             !(ifp->if_capenable & IFCAP_POLLING)) {
 449                                 error = ether_poll_register(fwe_poll, ifp);
 450                                 if (error)
 451                                         return(error);
 452                                 /* Disable interrupts */
 453                                 fc->set_intr(fc, 0);
 454                                 ifp->if_capenable |= IFCAP_POLLING;
 455                                 ifp->if_capenable |= IFCAP_POLLING_NOCOUNT;
 456                                 return (error);
 457                         }
 458                         if (!(ifr->ifr_reqcap & IFCAP_POLLING) &&
 459                             ifp->if_capenable & IFCAP_POLLING) {
 460                                 error = ether_poll_deregister(ifp);
 461                                 /* Enable interrupts. */
 462                                 fc->set_intr(fc, 1);
 463                                 ifp->if_capenable &= ~IFCAP_POLLING;
 464                                 ifp->if_capenable &= ~IFCAP_POLLING_NOCOUNT;
 465                                 return (error);
 466                         }
 467                     }
 468 #endif /* DEVICE_POLLING */
 469                         break;
 470 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
 471                 default:
 472 #else
 473                 case SIOCSIFADDR:
 474                 case SIOCGIFADDR:
 475                 case SIOCSIFMTU:
 476 #endif
 477                         s = splimp();
 478                         error = ether_ioctl(ifp, cmd, data);
 479                         splx(s);
 480                         return (error);
 481 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 482                 default:
 483                         return (EINVAL);
 484 #endif
 485         }
 486
 487         return (0);
 488 }
 489
 490 static void
 491 fwe_output_callback(struct fw_xfer *xfer)
 492 {
 493         struct fwe_softc *fwe;
 494         struct ifnet *ifp;
 495         int s;
 496
 497         fwe = (struct fwe_softc *)xfer->sc;
 498         ifp = fwe->eth_softc.ifp;
 499         /* XXX error check */
 500         FWEDEBUG(ifp, "resp = %d\n", xfer->resp);
 501         if (xfer->resp != 0)
 502                 ifp->if_oerrors ++;
 503
 504         m_freem(xfer->mbuf);
 505         fw_xfer_unload(xfer);
 506
 507         s = splimp();
 508         FWE_LOCK(fwe);
 509         STAILQ_INSERT_TAIL(&fwe->xferlist, xfer, link);
 510         FWE_UNLOCK(fwe);
 511         splx(s);
 512
 513         /* for queue full */
 514         if (ifp->if_snd.ifq_head != NULL)
 515                 fwe_start(ifp);
 516 }
 517
 518 static void
 519 fwe_start(struct ifnet *ifp)
 520 {
 521         struct fwe_softc *fwe = ((struct fwe_eth_softc *)ifp->if_softc)->fwe;
 522         int s;
 523
 524         FWEDEBUG(ifp, "starting\n");
 525
 526         if (fwe->dma_ch < 0) {
 527                 struct mbuf     *m = NULL;
 528
 529                 FWEDEBUG(ifp, "not ready\n");
 530
 531                 s = splimp();
 532                 do {
 533                         IF_DEQUEUE(&ifp->if_snd, m);
 534                         if (m != NULL)
 535                                 m_freem(m);
 536                         ifp->if_oerrors ++;
 537                 } while (m != NULL);
 538                 splx(s);
 539
 540                 return;
 541         }
 542
 543         s = splimp();
 544 #if defined(__FreeBSD__)
 545         ifp->if_drv_flags |= IFF_DRV_OACTIVE;
 546 #else
 547         ifp->if_flags |= IFF_OACTIVE;
 548 #endif
 549
 550         if (ifp->if_snd.ifq_len != 0)
 551                 fwe_as_output(fwe, ifp);
 552
 553 #if defined(__FreeBSD__)
 554         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 555 #else
 556         ifp->if_flags &= ~IFF_OACTIVE;
 557 #endif
 558         splx(s);
 559 }
 560
 561 #define HDR_LEN 4
 562 #ifndef ETHER_ALIGN
 563 #define ETHER_ALIGN 2
 564 #endif
 565 /* Async. stream output */
 566 static void
 567 fwe_as_output(struct fwe_softc *fwe, struct ifnet *ifp)
 568 {
 569         struct mbuf *m;
 570         struct fw_xfer *xfer;
 571         struct fw_xferq *xferq;
 572         struct fw_pkt *fp;
 573         int i = 0;
 574
 575         xfer = NULL;
 576         xferq = fwe->fd.fc->atq;
 577         while ((xferq->queued < xferq->maxq - 1) &&
 578                         (ifp->if_snd.ifq_head != NULL)) {
 579                 FWE_LOCK(fwe);
 580                 xfer = STAILQ_FIRST(&fwe->xferlist);
 581                 if (xfer == NULL) {
 582 #if 0
 583                         printf("if_fwe: lack of xfer\n");
 584 #endif
 585                         FWE_UNLOCK(fwe);
 586                         break;
 587                 }
 588                 STAILQ_REMOVE_HEAD(&fwe->xferlist, link);
 589                 FWE_UNLOCK(fwe);
 590
 591                 IF_DEQUEUE(&ifp->if_snd, m);
 592                 if (m == NULL) {
 593                         FWE_LOCK(fwe);
 594                         STAILQ_INSERT_HEAD(&fwe->xferlist, xfer, link);
 595                         FWE_UNLOCK(fwe);
 596                         break;
 597                 }
 598 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 599                 if (ifp->if_bpf != NULL)
 600                         bpf_mtap(ifp, m);
 601 #else
 602                 BPF_MTAP(ifp, m);
 603 #endif
 604
 605                 /* keep ip packet alignment for alpha */
 606                 M_PREPEND(m, ETHER_ALIGN, M_NOWAIT);
 607                 fp = &xfer->send.hdr;
 608                 *(uint32_t *)&xfer->send.hdr = *(int32_t *)&fwe->pkt_hdr;
 609                 fp->mode.stream.len = m->m_pkthdr.len;
 610                 xfer->mbuf = m;
 611                 xfer->send.pay_len = m->m_pkthdr.len;
 612
 613                 if (fw_asyreq(fwe->fd.fc, -1, xfer) != 0) {
 614                         /* error */
 615                         ifp->if_oerrors ++;
 616                         /* XXX set error code */
 617                         fwe_output_callback(xfer);
 618                 } else {
 619                         ifp->if_opackets ++;
 620                         i++;
 621                 }
 622         }
 623 #if 0
 624         if (i > 1)
 625                 printf("%d queued\n", i);
 626 #endif
 627         if (i > 0)
 628                 xferq->start(fwe->fd.fc);
 629 }
 630
 631 /* Async. stream output */
 632 static void
 633 fwe_as_input(struct fw_xferq *xferq)
 634 {
 635         struct mbuf *m, *m0;
 636         struct ifnet *ifp;
 637         struct fwe_softc *fwe;
 638         struct fw_bulkxfer *sxfer;
 639         struct fw_pkt *fp;
 640         u_char *c;
 641 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 642         struct ether_header *eh;
 643 #endif
 644
 645         fwe = (struct fwe_softc *)xferq->sc;
 646         ifp = fwe->eth_softc.ifp;
 647
 648         /* We do not need a lock here because the bottom half is serialized */
 649         while ((sxfer = STAILQ_FIRST(&xferq->stvalid)) != NULL) {
 650                 STAILQ_REMOVE_HEAD(&xferq->stvalid, link);
 651                 fp = mtod(sxfer->mbuf, struct fw_pkt *);
 652                 if (fwe->fd.fc->irx_post != NULL)
 653                         fwe->fd.fc->irx_post(fwe->fd.fc, fp->mode.ld);
 654                 m = sxfer->mbuf;
 655
 656                 /* insert new rbuf */
 657                 sxfer->mbuf = m0 = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
 658                 if (m0 != NULL) {
 659                         m0->m_len = m0->m_pkthdr.len = m0->m_ext.ext_size;
 660                         STAILQ_INSERT_TAIL(&xferq->stfree, sxfer, link);
 661                 } else
 662                         printf("%s: m_getcl failed\n", __FUNCTION__);
 663
 664                 if (sxfer->resp != 0 || fp->mode.stream.len <
 665                     ETHER_ALIGN + sizeof(struct ether_header)) {
 666                         m_freem(m);
 667                         ifp->if_ierrors ++;
 668                         continue;
 669                 }
 670
 671                 m->m_data += HDR_LEN + ETHER_ALIGN;
 672                 c = mtod(m, u_char *);
 673 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 674                 eh = (struct ether_header *)c;
 675                 m->m_data += sizeof(struct ether_header);
 676                 m->m_len = m->m_pkthdr.len = fp->mode.stream.len - ETHER_ALIGN
 677                     - sizeof(struct ether_header);
 678 #else
 679                 m->m_len = m->m_pkthdr.len = fp->mode.stream.len - ETHER_ALIGN;
 680 #endif
 681                 m->m_pkthdr.rcvif = ifp;
 682 #if 0
 683                 FWEDEBUG(ifp, "%02x %02x %02x %02x %02x %02x\n"
 684                          "%02x %02x %02x %02x %02x %02x\n"
 685                          "%02x %02x %02x %02x\n"
 686                          "%02x %02x %02x %02x\n"
 687                          "%02x %02x %02x %02x\n"
 688                          "%02x %02x %02x %02x\n",
 689                          c[0], c[1], c[2], c[3], c[4], c[5],
 690                          c[6], c[7], c[8], c[9], c[10], c[11],
 691                          c[12], c[13], c[14], c[15],
 692                          c[16], c[17], c[18], c[19],
 693                          c[20], c[21], c[22], c[23],
 694                          c[20], c[21], c[22], c[23]
 695                  );
 696 #endif
 697 #if defined(__DragonFly__) || __FreeBSD_version < 500000
 698                 ether_input(ifp, eh, m);
 699 #else
 700                 (*ifp->if_input)(ifp, m);
 701 #endif
 702                 ifp->if_ipackets ++;
 703         }
 704         if (STAILQ_FIRST(&xferq->stfree) != NULL)
 705                 fwe->fd.fc->irx_enable(fwe->fd.fc, fwe->dma_ch);
 706 }
 707
 708
 709 static devclass_t fwe_devclass;
 710
 711 static device_method_t fwe_methods[] = {
 712         /* device interface */
 713         DEVMETHOD(device_identify,      fwe_identify),
 714         DEVMETHOD(device_probe,         fwe_probe),
 715         DEVMETHOD(device_attach,        fwe_attach),
 716         DEVMETHOD(device_detach,        fwe_detach),
 717         { 0, 0 }
 718 };
 719
 720 static driver_t fwe_driver = {
 721         "fwe",
 722         fwe_methods,
 723         sizeof(struct fwe_softc),
 724 };
 725
 726
 727 #ifdef __DragonFly__
 728 DECLARE_DUMMY_MODULE(fwe);
 729 #endif
 730 DRIVER_MODULE(fwe, firewire, fwe_driver, fwe_devclass, 0, 0);
 731 MODULE_VERSION(fwe, 1);
 732 MODULE_DEPEND(fwe, firewire, 1, 1, 1);