sys/dev/netif/lnc/am79900.c

   1 /*      $NetBSD: am79900.c,v 1.17 2005/12/24 20:27:29 perry Exp $       */
   2 /*      $FreeBSD: src/sys/dev/le/am79900.c,v 1.3 2006/05/16 21:04:01 marius Exp $       */
   3 /*      $DragonFly: src/sys/dev/netif/lnc/am79900.c,v 1.4 2007/03/24 08:29:57 sephe Exp $       */
   4
   5
   6 /*-
   7  * Copyright (c) 1997 The NetBSD Foundation, Inc.
   8  * All rights reserved.
   9  *
  10  * This code is derived from software contributed to The NetBSD Foundation
  11  * by Jason R. Thorpe.
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  * 1. Redistributions of source code must retain the above copyright
  17  *    notice, this list of conditions and the following disclaimer.
  18  * 2. Redistributions in binary form must reproduce the above copyright
  19  *    notice, this list of conditions and the following disclaimer in the
  20  *    documentation and/or other materials provided with the distribution.
  21  * 3. All advertising materials mentioning features or use of this software
  22  *    must display the following acknowledgement:
  23  *      This product includes software developed by the NetBSD
  24  *      Foundation, Inc. and its contributors.
  25  * 4. Neither the name of The NetBSD Foundation nor the names of its
  26  *    contributors may be used to endorse or promote products derived
  27  *    from this software without specific prior written permission.
  28  *
  29  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  30  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  31  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  32  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  33  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  34  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  35  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  36  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  37  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  38  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  39  * POSSIBILITY OF SUCH DAMAGE.
  40  */
  41
  42 /*-
  43  * Copyright (c) 1992, 1993
  44  *      The Regents of the University of California.  All rights reserved.
  45  *
  46  * This code is derived from software contributed to Berkeley by
  47  * Ralph Campbell and Rick Macklem.
  48  *
  49  * Redistribution and use in source and binary forms, with or without
  50  * modification, are permitted provided that the following conditions
  51  * are met:
  52  * 1. Redistributions of source code must retain the above copyright
  53  *    notice, this list of conditions and the following disclaimer.
  54  * 2. Redistributions in binary form must reproduce the above copyright
  55  *    notice, this list of conditions and the following disclaimer in the
  56  *    documentation and/or other materials provided with the distribution.
  57  * 3. Neither the name of the University nor the names of its contributors
  58  *    may be used to endorse or promote products derived from this software
  59  *    without specific prior written permission.
  60  *
  61  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  62  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  63  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  64  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  65  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  66  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  67  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  68  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  69  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  70  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  71  * SUCH DAMAGE.
  72  *
  73  *      @(#)if_le.c     8.2 (Berkeley) 11/16/93
  74  */
  75
  76 /*-
  77  * Copyright (c) 1998
  78  *      Matthias Drochner.  All rights reserved.
  79  * Copyright (c) 1995 Charles M. Hannum.  All rights reserved.
  80  *
  81  * This code is derived from software contributed to Berkeley by
  82  * Ralph Campbell and Rick Macklem.
  83  *
  84  * Redistribution and use in source and binary forms, with or without
  85  * modification, are permitted provided that the following conditions
  86  * are met:
  87  * 1. Redistributions of source code must retain the above copyright
  88  *    notice, this list of conditions and the following disclaimer.
  89  * 2. Redistributions in binary form must reproduce the above copyright
  90  *    notice, this list of conditions and the following disclaimer in the
  91  *    documentation and/or other materials provided with the distribution.
  92  * 3. All advertising materials mentioning features or use of this software
  93  *    must display the following acknowledgement:
  94  *      This product includes software developed by the University of
  95  *      California, Berkeley and its contributors.
  96  * 4. Neither the name of the University nor the names of its contributors
  97  *    may be used to endorse or promote products derived from this software
  98  *    without specific prior written permission.
  99  *
 100  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 101  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 102  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 103  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 104  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 105  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 106  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 107  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 108  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 109  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 110  * SUCH DAMAGE.
 111  *
 112  *      @(#)if_le.c     8.2 (Berkeley) 11/16/93
 113  */
 114
 115 #include <sys/param.h>
 116 #include <sys/bus.h>
 117 #include <sys/endian.h>
 118 #include <sys/lock.h>
 119 #include <sys/mbuf.h>
 120 #include <sys/socket.h>
 121 #include <sys/bus.h>
 122
 123 #include <net/bpf.h>
 124 #include <net/ethernet.h>
 125 #include <net/if.h>
 126 #include <net/if_arp.h>
 127 #include <net/if_dl.h>
 128 #include <net/if_media.h>
 129 #include <net/if_var.h>
 130 #include <net/ifq_var.h>
 131
 132 #include <dev/netif/lnc/lancereg.h>
 133 #include <dev/netif/lnc/lancevar.h>
 134 #include <dev/netif/lnc/am79900reg.h>
 135 #include <dev/netif/lnc/am79900var.h>
 136
 137 static void     am79900_meminit(struct lance_softc *);
 138 static void     am79900_rint(struct lance_softc *);
 139 static void     am79900_tint(struct lance_softc *);
 140 static void     am79900_start_locked(struct lance_softc *sc);
 141
 142 #ifdef LEDEBUG
 143 static void     am79900_recv_print(struct lance_softc *, int);
 144 static void     am79900_xmit_print(struct lance_softc *, int);
 145 #endif
 146
 147 int
 148 am79900_config(struct am79900_softc *sc, const char* name, int unit)
 149 {
 150         int error, mem;
 151
 152         sc->lsc.sc_meminit = am79900_meminit;
 153         sc->lsc.sc_start_locked = am79900_start_locked;
 154
 155         error = lance_config(&sc->lsc, name, unit);
 156         if (error != 0)
 157                 return (error);
 158
 159         mem = 0;
 160         sc->lsc.sc_initaddr = mem;
 161         mem += sizeof(struct leinit);
 162         sc->lsc.sc_rmdaddr = mem;
 163         mem += sizeof(struct lermd) * sc->lsc.sc_nrbuf;
 164         sc->lsc.sc_tmdaddr = mem;
 165         mem += sizeof(struct letmd) * sc->lsc.sc_ntbuf;
 166         sc->lsc.sc_rbufaddr = mem;
 167         mem += LEBLEN * sc->lsc.sc_nrbuf;
 168         sc->lsc.sc_tbufaddr = mem;
 169         mem += LEBLEN * sc->lsc.sc_ntbuf;
 170
 171         if (mem > sc->lsc.sc_memsize)
 172                 panic("%s: memsize", __func__);
 173
 174         lance_attach(&sc->lsc);
 175
 176         return (0);
 177 }
 178
 179 void
 180 am79900_detach(struct am79900_softc *sc)
 181 {
 182
 183         ether_ifdetach(sc->lsc.ifp);
 184 }
 185
 186 /*
 187  * Set up the initialization block and the descriptor rings.
 188  */
 189 static void
 190 am79900_meminit(struct lance_softc *sc)
 191 {
 192         struct ifnet *ifp = sc->ifp;
 193         struct leinit init;
 194         struct lermd rmd;
 195         struct letmd tmd;
 196         u_long a;
 197         int bix;
 198
 199         if (ifp->if_flags & IFF_PROMISC)
 200                 init.init_mode = LE_HTOLE32(LE_MODE_NORMAL | LE_MODE_PROM);
 201         else
 202                 init.init_mode = LE_HTOLE32(LE_MODE_NORMAL);
 203
 204         init.init_mode |= LE_HTOLE32(((ffs(sc->sc_ntbuf) - 1) << 28) |
 205             ((ffs(sc->sc_nrbuf) - 1) << 20));
 206
 207         init.init_padr[0] = LE_HTOLE32(sc->sc_enaddr[0] |
 208             (sc->sc_enaddr[1] << 8) | (sc->sc_enaddr[2] << 16) |
 209             (sc->sc_enaddr[3] << 24));
 210         init.init_padr[1] = LE_HTOLE32(sc->sc_enaddr[4] |
 211             (sc->sc_enaddr[5] << 8));
 212         lance_setladrf(sc, init.init_ladrf);
 213
 214         sc->sc_last_rd = 0;
 215         sc->sc_first_td = sc->sc_last_td = sc->sc_no_td = 0;
 216
 217         a = sc->sc_addr + LE_RMDADDR(sc, 0);
 218         init.init_rdra = LE_HTOLE32(a);
 219
 220         a = sc->sc_addr + LE_TMDADDR(sc, 0);
 221         init.init_tdra = LE_HTOLE32(a);
 222
 223         (*sc->sc_copytodesc)(sc, &init, LE_INITADDR(sc), sizeof(init));
 224
 225         /*
 226          * Set up receive ring descriptors.
 227          */
 228         for (bix = 0; bix < sc->sc_nrbuf; bix++) {
 229                 a = sc->sc_addr + LE_RBUFADDR(sc, bix);
 230                 rmd.rmd0 = LE_HTOLE32(a);
 231                 rmd.rmd1 = LE_HTOLE32(LE_R1_OWN | LE_R1_ONES |
 232                     (-LEBLEN & 0xfff));
 233                 rmd.rmd2 = 0;
 234                 rmd.rmd3 = 0;
 235                 (*sc->sc_copytodesc)(sc, &rmd, LE_RMDADDR(sc, bix),
 236                     sizeof(rmd));
 237         }
 238
 239         /*
 240          * Set up transmit ring descriptors.
 241          */
 242         for (bix = 0; bix < sc->sc_ntbuf; bix++) {
 243                 a = sc->sc_addr + LE_TBUFADDR(sc, bix);
 244                 tmd.tmd0 = LE_HTOLE32(a);
 245                 tmd.tmd1 = LE_HTOLE32(LE_T1_ONES);
 246                 tmd.tmd2 = 0;
 247                 tmd.tmd3 = 0;
 248                 (*sc->sc_copytodesc)(sc, &tmd, LE_TMDADDR(sc, bix),
 249                     sizeof(tmd));
 250         }
 251 }
 252
 253 static void
 254 am79900_rint(struct lance_softc *sc)
 255 {
 256         struct ifnet *ifp = sc->ifp;
 257         struct mbuf *m;
 258         struct lermd rmd;
 259         uint32_t rmd1;
 260         int bix, rp;
 261 #if defined(__i386__) && !defined(PC98)
 262         struct ether_header *eh;
 263 #endif
 264
 265         bix = sc->sc_last_rd;
 266
 267         /* Process all buffers with valid data. */
 268         for (;;) {
 269                 rp = LE_RMDADDR(sc, bix);
 270                 (*sc->sc_copyfromdesc)(sc, &rmd, rp, sizeof(rmd));
 271
 272                 rmd1 = LE_LE32TOH(rmd.rmd1);
 273                 if (rmd1 & LE_R1_OWN)
 274                         break;
 275
 276                 m = NULL;
 277                 if ((rmd1 & (LE_R1_ERR | LE_R1_STP | LE_R1_ENP)) !=
 278                     (LE_R1_STP | LE_R1_ENP)){
 279                         if (rmd1 & LE_R1_ERR) {
 280 #ifdef LEDEBUG
 281                                 if (rmd1 & LE_R1_ENP) {
 282                                         if ((rmd1 & LE_R1_OFLO) == 0) {
 283                                                 if (rmd1 & LE_R1_FRAM)
 284                                                         if_printf(ifp,
 285                                                             "framing error\n");
 286                                                 if (rmd1 & LE_R1_CRC)
 287                                                         if_printf(ifp,
 288                                                             "crc mismatch\n");
 289                                         }
 290                                 } else
 291                                         if (rmd1 & LE_R1_OFLO)
 292                                                 if_printf(ifp, "overflow\n");
 293 #endif
 294                                 if (rmd1 & LE_R1_BUFF)
 295                                         if_printf(ifp,
 296                                             "receive buffer error\n");
 297                         } else if ((rmd1 & (LE_R1_STP | LE_R1_ENP)) !=
 298                             (LE_R1_STP | LE_R1_ENP))
 299                                 if_printf(ifp, "dropping chained buffer\n");
 300                 } else {
 301 #ifdef LEDEBUG
 302                         if (sc->sc_flags & LE_DEBUG)
 303                                 am79900_recv_print(sc, bix);
 304 #endif
 305                         /* Pull the packet off the interface. */
 306                         m = lance_get(sc, LE_RBUFADDR(sc, bix),
 307                             (LE_LE32TOH(rmd.rmd2) & 0xfff) - ETHER_CRC_LEN);
 308                 }
 309
 310                 rmd.rmd1 = LE_HTOLE32(LE_R1_OWN | LE_R1_ONES |
 311                     (-LEBLEN & 0xfff));
 312                 rmd.rmd2 = 0;
 313                 rmd.rmd3 = 0;
 314                 (*sc->sc_copytodesc)(sc, &rmd, rp, sizeof(rmd));
 315
 316                 if (++bix == sc->sc_nrbuf)
 317                         bix = 0;
 318
 319                 if (m != NULL) {
 320                         ifp->if_ipackets++;
 321
 322 #ifdef __i386__
 323                         /*
 324                          * The VMware LANCE does not present IFF_SIMPLEX
 325                          * behavior on multicast packets. Thus drop the
 326                          * packet if it is from ourselves.
 327                          */
 328                         eh = mtod(m, struct ether_header *);
 329                         if (memcmp(eh->ether_shost, sc->sc_enaddr,
 330                                    ETHER_ADDR_LEN) == 0) {
 331                                 m_freem(m);
 332                                 continue;
 333                         }
 334 #endif
 335
 336                         /* Pass the packet up. */
 337                         (*ifp->if_input)(ifp, m);
 338                 } else
 339                         ifp->if_ierrors++;
 340         }
 341
 342         sc->sc_last_rd = bix;
 343 }
 344
 345 static void
 346 am79900_tint(struct lance_softc *sc)
 347 {
 348         struct ifnet *ifp = sc->ifp;
 349         struct letmd tmd;
 350         uint32_t tmd1, tmd2;
 351         int bix;
 352
 353         bix = sc->sc_first_td;
 354
 355         for (;;) {
 356                 if (sc->sc_no_td <= 0)
 357                         break;
 358
 359                 (*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, bix),
 360                     sizeof(tmd));
 361
 362                 tmd1 = LE_LE32TOH(tmd.tmd1);
 363
 364 #ifdef LEDEBUG
 365                 if (sc->sc_flags & LE_DEBUG)
 366                         if_printf(ifp, "trans tmd: "
 367                             "adr %08x, flags/blen %08x\n",
 368                             LE_LE32TOH(tmd.tmd0), tmd1);
 369 #endif
 370
 371                 if (tmd1 & LE_T1_OWN)
 372                         break;
 373
 374                 ifp->if_flags &= ~IFF_OACTIVE;
 375
 376                 if (tmd1 & LE_T1_ERR) {
 377                         tmd2 = LE_LE32TOH(tmd.tmd2);
 378                         if (tmd2 & LE_T2_BUFF)
 379                                 if_printf(ifp, "transmit buffer error\n");
 380                         else if (tmd2 & LE_T2_UFLO)
 381                                 if_printf(ifp, "underflow\n");
 382                         if (tmd2 & (LE_T2_BUFF | LE_T2_UFLO)) {
 383                                 lance_init_locked(sc);
 384                                 return;
 385                         }
 386                         if (tmd2 & LE_T2_LCAR) {
 387                                 if (sc->sc_flags & LE_CARRIER) {
 388                                         ifp->if_link_state = LINK_STATE_DOWN;
 389                                         if_link_state_change(ifp);
 390                                 }
 391                                 sc->sc_flags &= ~LE_CARRIER;
 392                                 if (sc->sc_nocarrier)
 393                                         (*sc->sc_nocarrier)(sc);
 394                                 else
 395                                         if_printf(ifp, "lost carrier\n");
 396                         }
 397                         if (tmd2 & LE_T2_LCOL)
 398                                 ifp->if_collisions++;
 399                         if (tmd2 & LE_T2_RTRY) {
 400 #ifdef LEDEBUG
 401                                 if_printf(ifp, "excessive collisions\n");
 402 #endif
 403                                 ifp->if_collisions += 16;
 404                         }
 405                         ifp->if_oerrors++;
 406                 } else {
 407                         if (tmd1 & LE_T1_ONE)
 408                                 ifp->if_collisions++;
 409                         else if (tmd1 & LE_T1_MORE)
 410                                 /* Real number is unknown. */
 411                                 ifp->if_collisions += 2;
 412                         ifp->if_opackets++;
 413                 }
 414
 415                 if (++bix == sc->sc_ntbuf)
 416                         bix = 0;
 417
 418                 --sc->sc_no_td;
 419         }
 420
 421         sc->sc_first_td = bix;
 422
 423         ifp->if_timer = sc->sc_no_td > 0 ? 5 : 0;
 424 }
 425
 426 /*
 427  * Controller interrupt
 428  */
 429 void
 430 am79900_intr(void *arg)
 431 {
 432         struct lance_softc *sc = arg;
 433         struct ifnet *ifp = sc->ifp;
 434         uint16_t isr;
 435
 436         if (sc->sc_hwintr && (*sc->sc_hwintr)(sc) == -1) {
 437                 ifp->if_ierrors++;
 438                 lance_init_locked(sc);
 439                 return;
 440         }
 441
 442         isr = (*sc->sc_rdcsr)(sc, LE_CSR0);
 443 #if defined(LEDEBUG) && LEDEBUG > 1
 444         if (sc->sc_flags & LE_DEBUG)
 445                 if_printf(ifp, "%s: entering with isr=%04x\n", __func__, isr);
 446 #endif
 447         if ((isr & LE_C0_INTR) == 0) {
 448                 return;
 449         }
 450
 451         /*
 452          * Clear interrupt source flags and turn off interrupts. If we
 453          * don't clear these flags before processing their sources we
 454          * could completely miss some interrupt events as the NIC can
 455          * change these flags while we're in this handler. We turn off
 456          * interrupts so we don't get another RX interrupt while still
 457          * processing the previous one in ifp->if_input() with the
 458          * driver lock dropped.
 459          */
 460         (*sc->sc_wrcsr)(sc, LE_CSR0, isr & ~(LE_C0_INEA | LE_C0_TDMD |
 461             LE_C0_STOP | LE_C0_STRT | LE_C0_INIT));
 462
 463         if (isr & LE_C0_ERR) {
 464                 if (isr & LE_C0_BABL) {
 465 #ifdef LEDEBUG
 466                         if_printf(ifp, "babble\n");
 467 #endif
 468                         ifp->if_oerrors++;
 469                 }
 470 #if 0
 471                 if (isr & LE_C0_CERR) {
 472                         if_printf(ifp, "collision error\n");
 473                         ifp->if_collisions++;
 474                 }
 475 #endif
 476                 if (isr & LE_C0_MISS) {
 477 #ifdef LEDEBUG
 478                         if_printf(ifp, "missed packet\n");
 479 #endif
 480                         ifp->if_ierrors++;
 481                 }
 482                 if (isr & LE_C0_MERR) {
 483                         if_printf(ifp, "memory error\n");
 484                         lance_init_locked(sc);
 485                         return;
 486                 }
 487         }
 488
 489         if ((isr & LE_C0_RXON) == 0) {
 490                 if_printf(ifp, "receiver disabled\n");
 491                 ifp->if_ierrors++;
 492                 lance_init_locked(sc);
 493                 return;
 494         }
 495         if ((isr & LE_C0_TXON) == 0) {
 496                 if_printf(ifp, "transmitter disabled\n");
 497                 ifp->if_oerrors++;
 498                 lance_init_locked(sc);
 499                 return;
 500         }
 501
 502         /*
 503          * Pretend we have carrier; if we don't this will be cleared shortly.
 504          */
 505         if (!(sc->sc_flags & LE_CARRIER)) {
 506                 ifp->if_link_state = LINK_STATE_UP;
 507                 if_link_state_change(ifp);
 508         }
 509         sc->sc_flags |= LE_CARRIER;
 510
 511         if (isr & LE_C0_RINT)
 512                 am79900_rint(sc);
 513         if (isr & LE_C0_TINT)
 514                 am79900_tint(sc);
 515
 516         /* Enable interrupts again. */
 517         (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA);
 518
 519         if (!ifq_is_empty(&ifp->if_snd))
 520                 am79900_start_locked(sc);
 521
 522 }
 523
 524 /*
 525  * Set up output on interface.
 526  * Get another datagram to send off of the interface queue, and map it to the
 527  * interface before starting the output.
 528  */
 529 static void
 530 am79900_start_locked(struct lance_softc *sc)
 531 {
 532         struct ifnet *ifp = sc->ifp;
 533         struct letmd tmd;
 534         struct mbuf *m;
 535         int bix, enq, len, rp;
 536
 537         if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) !=
 538             IFF_RUNNING)
 539                 return;
 540
 541         bix = sc->sc_last_td;
 542         enq = 0;
 543
 544         for (; sc->sc_no_td < sc->sc_ntbuf &&
 545             !ifq_is_empty(&ifp->if_snd);) {
 546                 m = ifq_poll(&ifp->if_snd);
 547                 rp = LE_TMDADDR(sc, bix);
 548                 (*sc->sc_copyfromdesc)(sc, &tmd, rp, sizeof(tmd));
 549
 550                 if (LE_LE32TOH(tmd.tmd1) & LE_T1_OWN) {
 551                         ifp->if_flags |= IFF_OACTIVE;
 552                         if_printf(ifp,
 553                             "missing buffer, no_td = %d, last_td = %d\n",
 554                             sc->sc_no_td, sc->sc_last_td);
 555                 }
 556
 557                 ifq_dequeue(&ifp->if_snd, m);
 558                 if (m == 0)
 559                         break;
 560
 561                 /*
 562                  * If BPF is listening on this interface, let it see the packet
 563                  * before we commit it to the wire.
 564                  */
 565                 BPF_MTAP(ifp, m);
 566
 567                 /*
 568                  * Copy the mbuf chain into the transmit buffer.
 569                  */
 570                 len = lance_put(sc, LE_TBUFADDR(sc, bix), m);
 571
 572 #ifdef LEDEBUG
 573                 if (len > ETHERMTU + ETHER_HDR_LEN)
 574                         if_printf(ifp, "packet length %d\n", len);
 575 #endif
 576
 577                 /*
 578                  * Init transmit registers, and set transmit start flag.
 579                  */
 580                 tmd.tmd1 = LE_HTOLE32(LE_T1_OWN | LE_T1_STP | LE_T1_ENP |
 581                     LE_T1_ONES | (-len & 0xfff));
 582                 tmd.tmd2 = 0;
 583                 tmd.tmd3 = 0;
 584
 585                 (*sc->sc_copytodesc)(sc, &tmd, rp, sizeof(tmd));
 586
 587 #ifdef LEDEBUG
 588                 if (sc->sc_flags & LE_DEBUG)
 589                         am79900_xmit_print(sc, bix);
 590 #endif
 591
 592                 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_TDMD);
 593                 enq++;
 594
 595                 if (++bix == sc->sc_ntbuf)
 596                         bix = 0;
 597
 598                 if (++sc->sc_no_td == sc->sc_ntbuf) {
 599                         ifp->if_flags |= IFF_OACTIVE;
 600                         break;
 601                 }
 602         }
 603
 604         sc->sc_last_td = bix;
 605
 606         if (enq > 0)
 607                 ifp->if_timer = 5;
 608 }
 609
 610 #ifdef LEDEBUG
 611 static void
 612 am79900_recv_print(struct lance_softc *sc, int no)
 613 {
 614         struct ifnet *ifp = sc->ifp;
 615         struct ether_header eh;
 616         struct lermd rmd;
 617         uint16_t len;
 618
 619         (*sc->sc_copyfromdesc)(sc, &rmd, LE_RMDADDR(sc, no), sizeof(rmd));
 620         len = LE_LE32TOH(rmd.rmd2) & 0xfff;
 621         if_printf(ifp, "receive buffer %d, len = %d\n", no, len);
 622         if_printf(ifp, "status %04x\n", (*sc->sc_rdcsr)(sc, LE_CSR0));
 623         if_printf(ifp, "adr %08x, flags/blen %08x\n", LE_LE32TOH(rmd.rmd0),
 624             LE_LE32TOH(rmd.rmd1));
 625         if (len - ETHER_CRC_LEN >= sizeof(eh)) {
 626                 (*sc->sc_copyfrombuf)(sc, &eh, LE_RBUFADDR(sc, no), sizeof(eh));
 627                 if_printf(ifp, "dst %s", ether_sprintf(eh.ether_dhost));
 628                 kprintf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
 629                     ntohs(eh.ether_type));
 630         }
 631 }
 632
 633 static void
 634 am79900_xmit_print(struct lance_softc *sc, int no)
 635 {
 636         struct ifnet *ifp = sc->ifp;
 637         struct ether_header eh;
 638         struct letmd tmd;
 639         uint16_t len;
 640
 641         (*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, no), sizeof(tmd));
 642         len = -(LE_LE32TOH(tmd.tmd1) & 0xfff);
 643         if_printf(ifp, "transmit buffer %d, len = %d\n", no, len);
 644         if_printf(ifp, "status %04x\n", (*sc->sc_rdcsr)(sc, LE_CSR0));
 645         if_printf(ifp, "adr %08x, flags/blen %08x\n", LE_LE32TOH(tmd.tmd0),
 646             LE_LE32TOH(tmd.tmd1));
 647         if (len >= sizeof(eh)) {
 648                 (*sc->sc_copyfrombuf)(sc, &eh, LE_TBUFADDR(sc, no), sizeof(eh));
 649                 if_printf(ifp, "dst %s", ether_sprintf(eh.ether_dhost));
 650                 kprintf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
 651                     ntohs(eh.ether_type));
 652         }
 653 }
 654 #endif /* LEDEBUG */