sys/dev/le/am7990.c

   1 /*      $NetBSD: am7990.c,v 1.68 2005/12/11 12:21:25 christos Exp $     */
   2
   3 /*-
   4  * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Charles M. Hannum and by Jason R. Thorpe of the Numerical Aerospace
   9  * Simulation Facility, NASA Ames Research Center.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *      This product includes software developed by the NetBSD
  22  *      Foundation, Inc. and its contributors.
  23  * 4. Neither the name of The NetBSD Foundation nor the names of its
  24  *    contributors may be used to endorse or promote products derived
  25  *    from this software without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  37  * POSSIBILITY OF SUCH DAMAGE.
  38  */
  39
  40 /*-
  41  * Copyright (c) 1992, 1993
  42  *      The Regents of the University of California.  All rights reserved.
  43  *
  44  * This code is derived from software contributed to Berkeley by
  45  * Ralph Campbell and Rick Macklem.
  46  *
  47  * Redistribution and use in source and binary forms, with or without
  48  * modification, are permitted provided that the following conditions
  49  * are met:
  50  * 1. Redistributions of source code must retain the above copyright
  51  *    notice, this list of conditions and the following disclaimer.
  52  * 2. Redistributions in binary form must reproduce the above copyright
  53  *    notice, this list of conditions and the following disclaimer in the
  54  *    documentation and/or other materials provided with the distribution.
  55  * 3. Neither the name of the University nor the names of its contributors
  56  *    may be used to endorse or promote products derived from this software
  57  *    without specific prior written permission.
  58  *
  59  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  60  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  61  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  62  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  63  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  64  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  65  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  66  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  67  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  68  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  69  * SUCH DAMAGE.
  70  *
  71  *      @(#)if_le.c     8.2 (Berkeley) 11/16/93
  72  */
  73
  74 #include <sys/cdefs.h>
  75 __FBSDID("$FreeBSD$");
  76
  77 #include <sys/param.h>
  78 #include <sys/bus.h>
  79 #include <sys/endian.h>
  80 #include <sys/lock.h>
  81 #include <sys/mbuf.h>
  82 #include <sys/mutex.h>
  83 #include <sys/socket.h>
  84
  85 #include <net/bpf.h>
  86 #include <net/ethernet.h>
  87 #include <net/if.h>
  88 #include <net/if_arp.h>
  89 #include <net/if_dl.h>
  90 #include <net/if_media.h>
  91 #include <net/if_var.h>
  92
  93 #include <machine/bus.h>
  94
  95 #include <dev/le/lancereg.h>
  96 #include <dev/le/lancevar.h>
  97 #include <dev/le/am7990reg.h>
  98 #include <dev/le/am7990var.h>
  99
 100 static void     am7990_meminit(struct lance_softc *);
 101 static void     am7990_rint(struct lance_softc *);
 102 static void     am7990_tint(struct lance_softc *);
 103 static void     am7990_start_locked(struct lance_softc *sc);
 104
 105 #ifdef LEDEBUG
 106 static void     am7990_recv_print(struct lance_softc *, int);
 107 static void     am7990_xmit_print(struct lance_softc *, int);
 108 #endif
 109
 110 int
 111 am7990_config(struct am7990_softc *sc, const char* name, int unit)
 112 {
 113         int error, mem;
 114
 115         sc->lsc.sc_meminit = am7990_meminit;
 116         sc->lsc.sc_start_locked = am7990_start_locked;
 117
 118         error = lance_config(&sc->lsc, name, unit);
 119         if (error != 0)
 120                 return (error);
 121
 122         mem = 0;
 123         sc->lsc.sc_initaddr = mem;
 124         mem += sizeof(struct leinit);
 125         sc->lsc.sc_rmdaddr = mem;
 126         mem += sizeof(struct lermd) * sc->lsc.sc_nrbuf;
 127         sc->lsc.sc_tmdaddr = mem;
 128         mem += sizeof(struct letmd) * sc->lsc.sc_ntbuf;
 129         sc->lsc.sc_rbufaddr = mem;
 130         mem += LEBLEN * sc->lsc.sc_nrbuf;
 131         sc->lsc.sc_tbufaddr = mem;
 132         mem += LEBLEN * sc->lsc.sc_ntbuf;
 133
 134         if (mem > sc->lsc.sc_memsize)
 135                 panic("%s: memsize", __func__);
 136
 137         lance_attach(&sc->lsc);
 138
 139         return (0);
 140 }
 141
 142 void
 143 am7990_detach(struct am7990_softc *sc)
 144 {
 145
 146         lance_detach(&sc->lsc);
 147 }
 148
 149 /*
 150  * Set up the initialization block and the descriptor rings.
 151  */
 152 static void
 153 am7990_meminit(struct lance_softc *sc)
 154 {
 155         struct ifnet *ifp = sc->sc_ifp;
 156         struct leinit init;
 157         struct lermd rmd;
 158         struct letmd tmd;
 159         u_long a;
 160         int bix;
 161
 162         LE_LOCK_ASSERT(sc, MA_OWNED);
 163
 164         if (ifp->if_flags & IFF_PROMISC)
 165                 init.init_mode = LE_MODE_NORMAL | LE_MODE_PROM;
 166         else
 167                 init.init_mode = LE_MODE_NORMAL;
 168
 169         init.init_padr[0] = (sc->sc_enaddr[1] << 8) | sc->sc_enaddr[0];
 170         init.init_padr[1] = (sc->sc_enaddr[3] << 8) | sc->sc_enaddr[2];
 171         init.init_padr[2] = (sc->sc_enaddr[5] << 8) | sc->sc_enaddr[4];
 172         lance_setladrf(sc, init.init_ladrf);
 173
 174         sc->sc_last_rd = 0;
 175         sc->sc_first_td = sc->sc_last_td = sc->sc_no_td = 0;
 176
 177         a = sc->sc_addr + LE_RMDADDR(sc, 0);
 178         init.init_rdra = a;
 179         init.init_rlen = (a >> 16) | ((ffs(sc->sc_nrbuf) - 1) << 13);
 180
 181         a = sc->sc_addr + LE_TMDADDR(sc, 0);
 182         init.init_tdra = a;
 183         init.init_tlen = (a >> 16) | ((ffs(sc->sc_ntbuf) - 1) << 13);
 184
 185         (*sc->sc_copytodesc)(sc, &init, LE_INITADDR(sc), sizeof(init));
 186
 187         /*
 188          * Set up receive ring descriptors.
 189          */
 190         for (bix = 0; bix < sc->sc_nrbuf; bix++) {
 191                 a = sc->sc_addr + LE_RBUFADDR(sc, bix);
 192                 rmd.rmd0 = a;
 193                 rmd.rmd1_hadr = a >> 16;
 194                 rmd.rmd1_bits = LE_R1_OWN;
 195                 rmd.rmd2 = -LEBLEN | LE_XMD2_ONES;
 196                 rmd.rmd3 = 0;
 197                 (*sc->sc_copytodesc)(sc, &rmd, LE_RMDADDR(sc, bix),
 198                     sizeof(rmd));
 199         }
 200
 201         /*
 202          * Set up transmit ring descriptors.
 203          */
 204         for (bix = 0; bix < sc->sc_ntbuf; bix++) {
 205                 a = sc->sc_addr + LE_TBUFADDR(sc, bix);
 206                 tmd.tmd0 = a;
 207                 tmd.tmd1_hadr = a >> 16;
 208                 tmd.tmd1_bits = 0;
 209                 tmd.tmd2 = LE_XMD2_ONES;
 210                 tmd.tmd3 = 0;
 211                 (*sc->sc_copytodesc)(sc, &tmd, LE_TMDADDR(sc, bix),
 212                     sizeof(tmd));
 213         }
 214 }
 215
 216 static void
 217 am7990_rint(struct lance_softc *sc)
 218 {
 219         struct ifnet *ifp = sc->sc_ifp;
 220         struct mbuf *m;
 221         struct lermd rmd;
 222         int bix, rp;
 223 #if defined(LANCE_REVC_BUG)
 224         struct ether_header *eh;
 225         /* Make sure this is short-aligned, for ether_cmp(). */
 226         static uint16_t bcast_enaddr[3] = { ~0, ~0, ~0 };
 227 #endif
 228
 229         bix = sc->sc_last_rd;
 230
 231         /* Process all buffers with valid data. */
 232         for (;;) {
 233                 rp = LE_RMDADDR(sc, bix);
 234                 (*sc->sc_copyfromdesc)(sc, &rmd, rp, sizeof(rmd));
 235
 236                 if (rmd.rmd1_bits & LE_R1_OWN)
 237                         break;
 238
 239                 m = NULL;
 240                 if ((rmd.rmd1_bits & (LE_R1_ERR | LE_R1_STP | LE_R1_ENP)) !=
 241                     (LE_R1_STP | LE_R1_ENP)) {
 242                         if (rmd.rmd1_bits & LE_R1_ERR) {
 243 #ifdef LEDEBUG
 244                                 if (rmd.rmd1_bits & LE_R1_ENP) {
 245                                         if ((rmd.rmd1_bits & LE_R1_OFLO) == 0) {
 246                                                 if (rmd.rmd1_bits & LE_R1_FRAM)
 247                                                         if_printf(ifp,
 248                                                             "framing error\n");
 249                                                 if (rmd.rmd1_bits & LE_R1_CRC)
 250                                                         if_printf(ifp,
 251                                                             "crc mismatch\n");
 252                                         }
 253                                 } else
 254                                         if (rmd.rmd1_bits & LE_R1_OFLO)
 255                                                 if_printf(ifp, "overflow\n");
 256 #endif
 257                                 if (rmd.rmd1_bits & LE_R1_BUFF)
 258                                         if_printf(ifp,
 259                                             "receive buffer error\n");
 260                         } else if ((rmd.rmd1_bits & (LE_R1_STP | LE_R1_ENP)) !=
 261                             (LE_R1_STP | LE_R1_ENP))
 262                                 if_printf(ifp, "dropping chained buffer\n");
 263                 } else {
 264 #ifdef LEDEBUG
 265                         if (sc->sc_flags & LE_DEBUG)
 266                                 am7990_recv_print(sc, bix);
 267 #endif
 268                         /* Pull the packet off the interface. */
 269                         m = lance_get(sc, LE_RBUFADDR(sc, bix),
 270                             (int)rmd.rmd3 - ETHER_CRC_LEN);
 271                 }
 272
 273                 rmd.rmd1_bits = LE_R1_OWN;
 274                 rmd.rmd2 = -LEBLEN | LE_XMD2_ONES;
 275                 rmd.rmd3 = 0;
 276                 (*sc->sc_copytodesc)(sc, &rmd, rp, sizeof(rmd));
 277
 278                 if (++bix == sc->sc_nrbuf)
 279                         bix = 0;
 280
 281                 if (m != NULL) {
 282                         ifp->if_ipackets++;
 283
 284 #ifdef LANCE_REVC_BUG
 285                         /*
 286                          * The old LANCE (Rev. C) chips have a bug which
 287                          * causes garbage to be inserted in front of the
 288                          * received packet. The workaround is to ignore
 289                          * packets with an invalid destination address
 290                          * (garbage will usually not match).
 291                          * Of course, this precludes multicast support...
 292                          */
 293                         eh = mtod(m, struct ether_header *);
 294                         if (ether_cmp(eh->ether_dhost, sc->sc_enaddr) &&
 295                             ether_cmp(eh->ether_dhost, bcast_enaddr)) {
 296                                 m_freem(m);
 297                                 continue;
 298                         }
 299 #endif
 300
 301                         /* Pass the packet up. */
 302                         LE_UNLOCK(sc);
 303                         (*ifp->if_input)(ifp, m);
 304                         LE_LOCK(sc);
 305                 } else
 306                         ifp->if_ierrors++;
 307         }
 308
 309         sc->sc_last_rd = bix;
 310 }
 311
 312 static void
 313 am7990_tint(struct lance_softc *sc)
 314 {
 315         struct ifnet *ifp = sc->sc_ifp;
 316         struct letmd tmd;
 317         int bix;
 318
 319         bix = sc->sc_first_td;
 320
 321         for (;;) {
 322                 if (sc->sc_no_td <= 0)
 323                         break;
 324
 325                 (*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, bix),
 326                     sizeof(tmd));
 327
 328 #ifdef LEDEBUG
 329                 if (sc->sc_flags & LE_DEBUG)
 330                         if_printf(ifp, "trans tmd: "
 331                             "ladr %04x, hadr %02x, flags %02x, "
 332                             "bcnt %04x, mcnt %04x\n",
 333                             tmd.tmd0, tmd.tmd1_hadr, tmd.tmd1_bits,
 334                             tmd.tmd2, tmd.tmd3);
 335 #endif
 336
 337                 if (tmd.tmd1_bits & LE_T1_OWN)
 338                         break;
 339
 340                 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 341
 342                 if (tmd.tmd1_bits & LE_T1_ERR) {
 343                         if (tmd.tmd3 & LE_T3_BUFF)
 344                                 if_printf(ifp, "transmit buffer error\n");
 345                         else if (tmd.tmd3 & LE_T3_UFLO)
 346                                 if_printf(ifp, "underflow\n");
 347                         if (tmd.tmd3 & (LE_T3_BUFF | LE_T3_UFLO)) {
 348                                 lance_init_locked(sc);
 349                                 return;
 350                         }
 351                         if (tmd.tmd3 & LE_T3_LCAR) {
 352                                 if (sc->sc_flags & LE_CARRIER)
 353                                         if_link_state_change(ifp,
 354                                             LINK_STATE_DOWN);
 355                                 sc->sc_flags &= ~LE_CARRIER;
 356                                 if (sc->sc_nocarrier)
 357                                         (*sc->sc_nocarrier)(sc);
 358                                 else
 359                                         if_printf(ifp, "lost carrier\n");
 360                         }
 361                         if (tmd.tmd3 & LE_T3_LCOL)
 362                                 ifp->if_collisions++;
 363                         if (tmd.tmd3 & LE_T3_RTRY) {
 364 #ifdef LEDEBUG
 365                                 if_printf(ifp, "excessive collisions, tdr %d\n",
 366                                     tmd.tmd3 & LE_T3_TDR_MASK);
 367 #endif
 368                                 ifp->if_collisions += 16;
 369                         }
 370                         ifp->if_oerrors++;
 371                 } else {
 372                         if (tmd.tmd1_bits & LE_T1_ONE)
 373                                 ifp->if_collisions++;
 374                         else if (tmd.tmd1_bits & LE_T1_MORE)
 375                                 /* Real number is unknown. */
 376                                 ifp->if_collisions += 2;
 377                         ifp->if_opackets++;
 378                 }
 379
 380                 if (++bix == sc->sc_ntbuf)
 381                         bix = 0;
 382
 383                 --sc->sc_no_td;
 384         }
 385
 386         sc->sc_first_td = bix;
 387
 388         sc->sc_wdog_timer = sc->sc_no_td > 0 ? 5 : 0;
 389 }
 390
 391 /*
 392  * Controller interrupt
 393  */
 394 void
 395 am7990_intr(void *arg)
 396 {
 397         struct lance_softc *sc = arg;
 398         struct ifnet *ifp = sc->sc_ifp;
 399         uint16_t isr;
 400
 401         LE_LOCK(sc);
 402
 403         if (sc->sc_hwintr && (*sc->sc_hwintr)(sc) == -1) {
 404                 ifp->if_ierrors++;
 405                 lance_init_locked(sc);
 406                 LE_UNLOCK(sc);
 407                 return;
 408         }
 409
 410         isr = (*sc->sc_rdcsr)(sc, LE_CSR0);
 411 #if defined(LEDEBUG) && LEDEBUG > 1
 412         if (sc->sc_flags & LE_DEBUG)
 413                 if_printf(ifp, "%s: entering with isr=%04x\n", __func__, isr);
 414 #endif
 415         if ((isr & LE_C0_INTR) == 0) {
 416                 LE_UNLOCK(sc);
 417                 return;
 418         }
 419
 420         /*
 421          * Clear interrupt source flags and turn off interrupts. If we
 422          * don't clear these flags before processing their sources we
 423          * could completely miss some interrupt events as the NIC can
 424          * change these flags while we're in this handler. We toggle
 425          * the interrupt enable bit in order to keep receiving them
 426          * (some chips work without this, some don't).
 427          */
 428         (*sc->sc_wrcsr)(sc, LE_CSR0, isr & ~(LE_C0_INEA | LE_C0_TDMD |
 429             LE_C0_STOP | LE_C0_STRT | LE_C0_INIT));
 430
 431         if (isr & LE_C0_ERR) {
 432                 if (isr & LE_C0_BABL) {
 433 #ifdef LEDEBUG
 434                         if_printf(ifp, "babble\n");
 435 #endif
 436                         ifp->if_oerrors++;
 437                 }
 438 #if 0
 439                 if (isr & LE_C0_CERR) {
 440                         if_printf(ifp, "collision error\n");
 441                         ifp->if_collisions++;
 442                 }
 443 #endif
 444                 if (isr & LE_C0_MISS) {
 445 #ifdef LEDEBUG
 446                         if_printf(ifp, "missed packet\n");
 447 #endif
 448                         ifp->if_ierrors++;
 449                 }
 450                 if (isr & LE_C0_MERR) {
 451                         if_printf(ifp, "memory error\n");
 452                         lance_init_locked(sc);
 453                         LE_UNLOCK(sc);
 454                         return;
 455                 }
 456         }
 457
 458         if ((isr & LE_C0_RXON) == 0) {
 459                 if_printf(ifp, "receiver disabled\n");
 460                 ifp->if_ierrors++;
 461                 lance_init_locked(sc);
 462                 LE_UNLOCK(sc);
 463                 return;
 464         }
 465         if ((isr & LE_C0_TXON) == 0) {
 466                 if_printf(ifp, "transmitter disabled\n");
 467                 ifp->if_oerrors++;
 468                 lance_init_locked(sc);
 469                 LE_UNLOCK(sc);
 470                 return;
 471         }
 472
 473         /*
 474          * Pretend we have carrier; if we don't this will be cleared shortly.
 475          */
 476         if (!(sc->sc_flags & LE_CARRIER))
 477                 if_link_state_change(ifp, LINK_STATE_UP);
 478         sc->sc_flags |= LE_CARRIER;
 479
 480         if (isr & LE_C0_RINT)
 481                 am7990_rint(sc);
 482         if (isr & LE_C0_TINT)
 483                 am7990_tint(sc);
 484
 485         /* Enable interrupts again. */
 486         (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA);
 487
 488         if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
 489                 am7990_start_locked(sc);
 490
 491         LE_UNLOCK(sc);
 492 }
 493
 494 /*
 495  * Set up output on interface.
 496  * Get another datagram to send off of the interface queue, and map it to the
 497  * interface before starting the output.
 498  */
 499 static void
 500 am7990_start_locked(struct lance_softc *sc)
 501 {
 502         struct ifnet *ifp = sc->sc_ifp;
 503         struct letmd tmd;
 504         struct mbuf *m;
 505         int bix, enq, len, rp;
 506
 507         LE_LOCK_ASSERT(sc, MA_OWNED);
 508
 509         if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
 510             IFF_DRV_RUNNING)
 511                 return;
 512
 513         bix = sc->sc_last_td;
 514         enq = 0;
 515
 516         for (; sc->sc_no_td < sc->sc_ntbuf &&
 517             !IFQ_DRV_IS_EMPTY(&ifp->if_snd);) {
 518                 rp = LE_TMDADDR(sc, bix);
 519                 (*sc->sc_copyfromdesc)(sc, &tmd, rp, sizeof(tmd));
 520
 521                 if (tmd.tmd1_bits & LE_T1_OWN) {
 522                         ifp->if_drv_flags |= IFF_DRV_OACTIVE;
 523                         if_printf(ifp,
 524                             "missing buffer, no_td = %d, last_td = %d\n",
 525                             sc->sc_no_td, sc->sc_last_td);
 526                 }
 527
 528                 IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
 529                 if (m == 0)
 530                         break;
 531
 532                 /*
 533                  * If BPF is listening on this interface, let it see the packet
 534                  * before we commit it to the wire.
 535                  */
 536                 BPF_MTAP(ifp, m);
 537
 538                 /*
 539                  * Copy the mbuf chain into the transmit buffer.
 540                  */
 541                 len = lance_put(sc, LE_TBUFADDR(sc, bix), m);
 542
 543 #ifdef LEDEBUG
 544                 if (len > ETHERMTU + ETHER_HDR_LEN)
 545                         if_printf(ifp, "packet length %d\n", len);
 546 #endif
 547
 548                 /*
 549                  * Init transmit registers, and set transmit start flag.
 550                  */
 551                 tmd.tmd1_bits = LE_T1_OWN | LE_T1_STP | LE_T1_ENP;
 552                 tmd.tmd2 = -len | LE_XMD2_ONES;
 553                 tmd.tmd3 = 0;
 554
 555                 (*sc->sc_copytodesc)(sc, &tmd, rp, sizeof(tmd));
 556
 557 #ifdef LEDEBUG
 558                 if (sc->sc_flags & LE_DEBUG)
 559                         am7990_xmit_print(sc, bix);
 560 #endif
 561
 562                 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_TDMD);
 563                 enq++;
 564
 565                 if (++bix == sc->sc_ntbuf)
 566                         bix = 0;
 567
 568                 if (++sc->sc_no_td == sc->sc_ntbuf) {
 569                         ifp->if_drv_flags |= IFF_DRV_OACTIVE;
 570                         break;
 571                 }
 572         }
 573
 574         sc->sc_last_td = bix;
 575
 576         if (enq > 0)
 577                 sc->sc_wdog_timer = 5;
 578 }
 579
 580 #ifdef LEDEBUG
 581 static void
 582 am7990_recv_print(struct lance_softc *sc, int no)
 583 {
 584         struct ifnet *ifp = sc->sc_ifp;
 585         struct ether_header eh;
 586         struct lermd rmd;
 587         uint16_t len;
 588
 589         (*sc->sc_copyfromdesc)(sc, &rmd, LE_RMDADDR(sc, no), sizeof(rmd));
 590         len = rmd.rmd3;
 591         if_printf(ifp, "receive buffer %d, len = %d\n", no, len);
 592         if_printf(ifp, "status %04x\n", (*sc->sc_rdcsr)(sc, LE_CSR0));
 593         if_printf(ifp,
 594             "ladr %04x, hadr %02x, flags %02x, bcnt %04x, mcnt %04x\n",
 595             rmd.rmd0, rmd.rmd1_hadr, rmd.rmd1_bits, rmd.rmd2, rmd.rmd3);
 596         if (len - ETHER_CRC_LEN >= sizeof(eh)) {
 597                 (*sc->sc_copyfrombuf)(sc, &eh, LE_RBUFADDR(sc, no), sizeof(eh));
 598                 if_printf(ifp, "dst %s", ether_sprintf(eh.ether_dhost));
 599                 printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
 600                     ntohs(eh.ether_type));
 601         }
 602 }
 603
 604 static void
 605 am7990_xmit_print(struct lance_softc *sc, int no)
 606 {
 607         struct ifnet *ifp = sc->sc_ifp;
 608         struct ether_header eh;
 609         struct letmd tmd;
 610         uint16_t len;
 611
 612         (*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, no), sizeof(tmd));
 613         len = -tmd.tmd2;
 614         if_printf(ifp, "transmit buffer %d, len = %d\n", no, len);
 615         if_printf(ifp, "status %04x\n", (*sc->sc_rdcsr)(sc, LE_CSR0));
 616         if_printf(ifp,
 617             "ladr %04x, hadr %02x, flags %02x, bcnt %04x, mcnt %04x\n",
 618             tmd.tmd0, tmd.tmd1_hadr, tmd.tmd1_bits, tmd.tmd2, tmd.tmd3);
 619         if (len >= sizeof(eh)) {
 620                 (*sc->sc_copyfrombuf)(sc, &eh, LE_TBUFADDR(sc, no), sizeof(eh));
 621                 if_printf(ifp, "dst %s", ether_sprintf(eh.ether_dhost));
 622                 printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
 623                     ntohs(eh.ether_type));
 624         }
 625 }
 626 #endif /* LEDEBUG */