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