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am79900.c revision 1.26
      1 /*	$NetBSD: am79900.c,v 1.26 2017/05/23 04:51:31 ozaki-r Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1997 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*-
     33  * Copyright (c) 1992, 1993
     34  *	The Regents of the University of California.  All rights reserved.
     35  *
     36  * This code is derived from software contributed to Berkeley by
     37  * Ralph Campbell and Rick Macklem.
     38  *
     39  * Redistribution and use in source and binary forms, with or without
     40  * modification, are permitted provided that the following conditions
     41  * are met:
     42  * 1. Redistributions of source code must retain the above copyright
     43  *    notice, this list of conditions and the following disclaimer.
     44  * 2. Redistributions in binary form must reproduce the above copyright
     45  *    notice, this list of conditions and the following disclaimer in the
     46  *    documentation and/or other materials provided with the distribution.
     47  * 3. Neither the name of the University nor the names of its contributors
     48  *    may be used to endorse or promote products derived from this software
     49  *    without specific prior written permission.
     50  *
     51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     61  * SUCH DAMAGE.
     62  *
     63  *	@(#)if_le.c	8.2 (Berkeley) 11/16/93
     64  */
     65 
     66 /*-
     67  * Copyright (c) 1998
     68  *	Matthias Drochner.  All rights reserved.
     69  * Copyright (c) 1995 Charles M. Hannum.  All rights reserved.
     70  *
     71  * This code is derived from software contributed to Berkeley by
     72  * Ralph Campbell and Rick Macklem.
     73  *
     74  * Redistribution and use in source and binary forms, with or without
     75  * modification, are permitted provided that the following conditions
     76  * are met:
     77  * 1. Redistributions of source code must retain the above copyright
     78  *    notice, this list of conditions and the following disclaimer.
     79  * 2. Redistributions in binary form must reproduce the above copyright
     80  *    notice, this list of conditions and the following disclaimer in the
     81  *    documentation and/or other materials provided with the distribution.
     82  * 3. All advertising materials mentioning features or use of this software
     83  *    must display the following acknowledgement:
     84  *	This product includes software developed by the University of
     85  *	California, Berkeley and its contributors.
     86  * 4. Neither the name of the University nor the names of its contributors
     87  *    may be used to endorse or promote products derived from this software
     88  *    without specific prior written permission.
     89  *
     90  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     91  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     92  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     93  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     94  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     95  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     96  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     97  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     98  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     99  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    100  * SUCH DAMAGE.
    101  *
    102  *	@(#)if_le.c	8.2 (Berkeley) 11/16/93
    103  */
    104 
    105 #include <sys/cdefs.h>
    106 __KERNEL_RCSID(0, "$NetBSD: am79900.c,v 1.26 2017/05/23 04:51:31 ozaki-r Exp $");
    107 
    108 #include <sys/param.h>
    109 #include <sys/systm.h>
    110 #include <sys/mbuf.h>
    111 #include <sys/syslog.h>
    112 #include <sys/socket.h>
    113 #include <sys/device.h>
    114 #include <sys/malloc.h>
    115 #include <sys/ioctl.h>
    116 #include <sys/errno.h>
    117 #include <sys/rndsource.h>
    118 
    119 #include <net/if.h>
    120 #include <net/if_dl.h>
    121 #include <net/if_ether.h>
    122 #include <net/if_media.h>
    123 
    124 #include <net/bpf.h>
    125 #include <net/bpfdesc.h>
    126 
    127 #include <dev/ic/lancereg.h>
    128 #include <dev/ic/lancevar.h>
    129 #include <dev/ic/am79900reg.h>
    130 #include <dev/ic/am79900var.h>
    131 
    132 static void	am79900_meminit(struct lance_softc *);
    133 static void	am79900_start(struct ifnet *);
    134 
    135 #if defined(_KERNEL_OPT)
    136 #include "opt_ddb.h"
    137 #endif
    138 
    139 #ifdef LEDEBUG
    140 static void	am79900_recv_print(struct lance_softc *, int);
    141 static void	am79900_xmit_print(struct lance_softc *, int);
    142 #endif
    143 
    144 #define	ifp	(&sc->sc_ethercom.ec_if)
    145 
    146 void
    147 am79900_config(struct am79900_softc *sc)
    148 {
    149 	int mem, i;
    150 
    151 	sc->lsc.sc_meminit = am79900_meminit;
    152 	sc->lsc.sc_start = am79900_start;
    153 
    154 	lance_config(&sc->lsc);
    155 	if_deferred_start_init(&sc->lsc.sc_ethercom.ec_if, NULL);
    156 
    157 	mem = 0;
    158 	sc->lsc.sc_initaddr = mem;
    159 	mem += sizeof(struct leinit);
    160 	sc->lsc.sc_rmdaddr = mem;
    161 	mem += sizeof(struct lermd) * sc->lsc.sc_nrbuf;
    162 	sc->lsc.sc_tmdaddr = mem;
    163 	mem += sizeof(struct letmd) * sc->lsc.sc_ntbuf;
    164 	for (i = 0; i < sc->lsc.sc_nrbuf; i++, mem += LEBLEN)
    165 		sc->lsc.sc_rbufaddr[i] = mem;
    166 	for (i = 0; i < sc->lsc.sc_ntbuf; i++, mem += LEBLEN)
    167 		sc->lsc.sc_tbufaddr[i] = mem;
    168 
    169 	if (mem > sc->lsc.sc_memsize)
    170 		panic("%s: memsize", device_xname(sc->lsc.sc_dev));
    171 }
    172 
    173 /*
    174  * Set up the initialization block and the descriptor rings.
    175  */
    176 static void
    177 am79900_meminit(struct lance_softc *sc)
    178 {
    179 	u_long a;
    180 	int bix;
    181 	struct leinit init;
    182 	struct lermd rmd;
    183 	struct letmd tmd;
    184 	uint8_t *myaddr;
    185 
    186 	if (ifp->if_flags & IFF_PROMISC)
    187 		init.init_mode = LE_MODE_NORMAL | LE_MODE_PROM;
    188 	else
    189 		init.init_mode = LE_MODE_NORMAL;
    190 	if (sc->sc_initmodemedia == 1)
    191 		init.init_mode |= LE_MODE_PSEL0;
    192 
    193 	init.init_mode |= ((ffs(sc->sc_ntbuf) - 1) << 28)
    194 	  | ((ffs(sc->sc_nrbuf) - 1) << 20);
    195 
    196 	/*
    197 	 * Update our private copy of the Ethernet address.
    198 	 * We NEED the copy so we can ensure its alignment!
    199 	 */
    200 	memcpy(sc->sc_enaddr, CLLADDR(ifp->if_sadl), ETHER_ADDR_LEN);
    201 	myaddr = sc->sc_enaddr;
    202 
    203 	init.init_padr[0] = myaddr[0] | (myaddr[1] << 8)
    204 	  | (myaddr[2] << 16) | (myaddr[3] << 24);
    205 	init.init_padr[1] = myaddr[4] | (myaddr[5] << 8);
    206 	lance_setladrf(&sc->sc_ethercom, init.init_ladrf);
    207 
    208 	sc->sc_last_rd = 0;
    209 	sc->sc_first_td = sc->sc_last_td = sc->sc_no_td = 0;
    210 
    211 	a = sc->sc_addr + LE_RMDADDR(sc, 0);
    212 	init.init_rdra = a;
    213 
    214 	a = sc->sc_addr + LE_TMDADDR(sc, 0);
    215 	init.init_tdra = a;
    216 
    217 	(*sc->sc_copytodesc)(sc, &init, LE_INITADDR(sc), sizeof(init));
    218 
    219 	/*
    220 	 * Set up receive ring descriptors.
    221 	 */
    222 	for (bix = 0; bix < sc->sc_nrbuf; bix++) {
    223 		a = sc->sc_addr + LE_RBUFADDR(sc, bix);
    224 		rmd.rmd0 = a;
    225 		rmd.rmd1 = LE_R1_OWN | LE_R1_ONES | (-LEBLEN & 0xfff);
    226 		rmd.rmd2 = 0;
    227 		rmd.rmd3 = 0;
    228 		(*sc->sc_copytodesc)(sc, &rmd, LE_RMDADDR(sc, bix),
    229 		    sizeof(rmd));
    230 	}
    231 
    232 	/*
    233 	 * Set up transmit ring descriptors.
    234 	 */
    235 	for (bix = 0; bix < sc->sc_ntbuf; bix++) {
    236 		a = sc->sc_addr + LE_TBUFADDR(sc, bix);
    237 		tmd.tmd0 = a;
    238 		tmd.tmd1 = LE_T1_ONES;
    239 		tmd.tmd2 = 0;
    240 		tmd.tmd3 = 0;
    241 		(*sc->sc_copytodesc)(sc, &tmd, LE_TMDADDR(sc, bix),
    242 		    sizeof(tmd));
    243 	}
    244 }
    245 
    246 static inline void
    247 am79900_rint(struct lance_softc *sc)
    248 {
    249 	int bix;
    250 	int rp;
    251 	struct lermd rmd;
    252 
    253 	bix = sc->sc_last_rd;
    254 
    255 	/* Process all buffers with valid data. */
    256 	for (;;) {
    257 		rp = LE_RMDADDR(sc, bix);
    258 		(*sc->sc_copyfromdesc)(sc, &rmd, rp, sizeof(rmd));
    259 
    260 		if (rmd.rmd1 & LE_R1_OWN)
    261 			break;
    262 
    263 		if (rmd.rmd1 & LE_R1_ERR) {
    264 			if (rmd.rmd1 & LE_R1_ENP) {
    265 #ifdef LEDEBUG
    266 				if ((rmd.rmd1 & LE_R1_OFLO) == 0) {
    267 					if (rmd.rmd1 & LE_R1_FRAM)
    268 						printf("%s: framing error\n",
    269 						    device_xname(sc->sc_dev));
    270 					if (rmd.rmd1 & LE_R1_CRC)
    271 						printf("%s: crc mismatch\n",
    272 						    device_xname(sc->sc_dev));
    273 				}
    274 #endif
    275 			} else {
    276 				if (rmd.rmd1 & LE_R1_OFLO)
    277 					printf("%s: overflow\n",
    278 					    device_xname(sc->sc_dev));
    279 			}
    280 			if (rmd.rmd1 & LE_R1_BUFF)
    281 				printf("%s: receive buffer error\n",
    282 				    device_xname(sc->sc_dev));
    283 			ifp->if_ierrors++;
    284 		} else if ((rmd.rmd1 & (LE_R1_STP | LE_R1_ENP)) !=
    285 		    (LE_R1_STP | LE_R1_ENP)) {
    286 			printf("%s: dropping chained buffer\n",
    287 			    device_xname(sc->sc_dev));
    288 			ifp->if_ierrors++;
    289 		} else {
    290 #ifdef LEDEBUG
    291 			if (sc->sc_debug)
    292 				am79900_recv_print(sc, sc->sc_last_rd);
    293 #endif
    294 			lance_read(sc, LE_RBUFADDR(sc, bix),
    295 				   (rmd.rmd2  & 0xfff) - 4);
    296 		}
    297 
    298 		rmd.rmd1 = LE_R1_OWN | LE_R1_ONES | (-LEBLEN & 0xfff);
    299 		rmd.rmd2 = 0;
    300 		rmd.rmd3 = 0;
    301 		(*sc->sc_copytodesc)(sc, &rmd, rp, sizeof(rmd));
    302 
    303 #ifdef LEDEBUG
    304 		if (sc->sc_debug)
    305 			printf("sc->sc_last_rd = %x, rmd: "
    306 			       "adr %08x, flags/blen %08x\n",
    307 				sc->sc_last_rd,
    308 				rmd.rmd0, rmd.rmd1);
    309 #endif
    310 
    311 		if (++bix == sc->sc_nrbuf)
    312 			bix = 0;
    313 	}
    314 
    315 	sc->sc_last_rd = bix;
    316 }
    317 
    318 static inline void
    319 am79900_tint(struct lance_softc *sc)
    320 {
    321 	int bix;
    322 	struct letmd tmd;
    323 
    324 	bix = sc->sc_first_td;
    325 
    326 	for (;;) {
    327 		if (sc->sc_no_td <= 0)
    328 			break;
    329 
    330 		(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, bix),
    331 		    sizeof(tmd));
    332 
    333 #ifdef LEDEBUG
    334 		if (sc->sc_debug)
    335 			printf("trans tmd: "
    336 			    "adr %08x, flags/blen %08x\n",
    337 			    tmd.tmd0, tmd.tmd1);
    338 #endif
    339 
    340 		if (tmd.tmd1 & LE_T1_OWN)
    341 			break;
    342 
    343 		ifp->if_flags &= ~IFF_OACTIVE;
    344 
    345 		if (tmd.tmd1 & LE_T1_ERR) {
    346 			if (tmd.tmd2 & LE_T2_BUFF)
    347 				printf("%s: transmit buffer error\n",
    348 				    device_xname(sc->sc_dev));
    349 			else if (tmd.tmd2 & LE_T2_UFLO)
    350 				printf("%s: underflow\n",
    351 				    device_xname(sc->sc_dev));
    352 			if (tmd.tmd2 & (LE_T2_BUFF | LE_T2_UFLO)) {
    353 				lance_reset(sc);
    354 				return;
    355 			}
    356 			if (tmd.tmd2 & LE_T2_LCAR) {
    357 				sc->sc_havecarrier = 0;
    358 				if (sc->sc_nocarrier)
    359 					(*sc->sc_nocarrier)(sc);
    360 				else
    361 					printf("%s: lost carrier\n",
    362 					    device_xname(sc->sc_dev));
    363 			}
    364 			if (tmd.tmd2 & LE_T2_LCOL)
    365 				ifp->if_collisions++;
    366 			if (tmd.tmd2 & LE_T2_RTRY) {
    367 #ifdef LEDEBUG
    368 				printf("%s: excessive collisions\n",
    369 				    device_xname(sc->sc_dev));
    370 #endif
    371 				ifp->if_collisions += 16;
    372 			}
    373 			ifp->if_oerrors++;
    374 		} else {
    375 			if (tmd.tmd1 & LE_T1_ONE)
    376 				ifp->if_collisions++;
    377 			else if (tmd.tmd1 & LE_T1_MORE)
    378 				/* Real number is unknown. */
    379 				ifp->if_collisions += 2;
    380 			ifp->if_opackets++;
    381 		}
    382 
    383 		if (++bix == sc->sc_ntbuf)
    384 			bix = 0;
    385 
    386 		--sc->sc_no_td;
    387 	}
    388 
    389 	sc->sc_first_td = bix;
    390 
    391 	if_schedule_deferred_start(ifp);
    392 
    393 	if (sc->sc_no_td == 0)
    394 		ifp->if_timer = 0;
    395 }
    396 
    397 /*
    398  * Controller interrupt.
    399  */
    400 int
    401 am79900_intr(void *arg)
    402 {
    403 	struct lance_softc *sc = arg;
    404 	uint16_t isr;
    405 
    406 	isr = (*sc->sc_rdcsr)(sc, LE_CSR0) | sc->sc_saved_csr0;
    407 	sc->sc_saved_csr0 = 0;
    408 #if defined(LEDEBUG) && LEDEBUG > 1
    409 	if (sc->sc_debug)
    410 		printf("%s: am79900_intr entering with isr=%04x\n",
    411 		    device_xname(sc->sc_dev), isr);
    412 #endif
    413 	if ((isr & LE_C0_INTR) == 0)
    414 		return (0);
    415 
    416 	(*sc->sc_wrcsr)(sc, LE_CSR0,
    417 	    isr & (LE_C0_INEA | LE_C0_BABL | LE_C0_MISS | LE_C0_MERR |
    418 		   LE_C0_RINT | LE_C0_TINT | LE_C0_IDON));
    419 	if (isr & LE_C0_ERR) {
    420 		if (isr & LE_C0_BABL) {
    421 #ifdef LEDEBUG
    422 			printf("%s: babble\n", device_xname(sc->sc_dev));
    423 #endif
    424 			ifp->if_oerrors++;
    425 		}
    426 #if 0
    427 		if (isr & LE_C0_CERR) {
    428 			printf("%s: collision error\n",
    429 			    device_xname(sc->sc_dev));
    430 			ifp->if_collisions++;
    431 		}
    432 #endif
    433 		if (isr & LE_C0_MISS) {
    434 #ifdef LEDEBUG
    435 			printf("%s: missed packet\n", device_xname(sc->sc_dev));
    436 #endif
    437 			ifp->if_ierrors++;
    438 		}
    439 		if (isr & LE_C0_MERR) {
    440 			printf("%s: memory error\n", device_xname(sc->sc_dev));
    441 			lance_reset(sc);
    442 			return (1);
    443 		}
    444 	}
    445 
    446 	if ((isr & LE_C0_RXON) == 0) {
    447 		printf("%s: receiver disabled\n", device_xname(sc->sc_dev));
    448 		ifp->if_ierrors++;
    449 		lance_reset(sc);
    450 		return (1);
    451 	}
    452 	if ((isr & LE_C0_TXON) == 0) {
    453 		printf("%s: transmitter disabled\n", device_xname(sc->sc_dev));
    454 		ifp->if_oerrors++;
    455 		lance_reset(sc);
    456 		return (1);
    457 	}
    458 
    459 	/*
    460 	 * Pretend we have carrier; if we don't this will be cleared
    461 	 * shortly.
    462 	 */
    463 	sc->sc_havecarrier = 1;
    464 
    465 	if (isr & LE_C0_RINT)
    466 		am79900_rint(sc);
    467 	if (isr & LE_C0_TINT)
    468 		am79900_tint(sc);
    469 
    470 	rnd_add_uint32(&sc->rnd_source, isr);
    471 
    472 	return (1);
    473 }
    474 
    475 #undef	ifp
    476 
    477 /*
    478  * Setup output on interface.
    479  * Get another datagram to send off of the interface queue, and map it to the
    480  * interface before starting the output.
    481  * Called only at splnet or interrupt level.
    482  */
    483 static void
    484 am79900_start(struct ifnet *ifp)
    485 {
    486 	struct lance_softc *sc = ifp->if_softc;
    487 	int bix;
    488 	struct mbuf *m;
    489 	struct letmd tmd;
    490 	int rp;
    491 	int len;
    492 
    493 	if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
    494 		return;
    495 
    496 	bix = sc->sc_last_td;
    497 
    498 	for (;;) {
    499 		rp = LE_TMDADDR(sc, bix);
    500 		(*sc->sc_copyfromdesc)(sc, &tmd, rp, sizeof(tmd));
    501 
    502 		if (tmd.tmd1 & LE_T1_OWN) {
    503 			ifp->if_flags |= IFF_OACTIVE;
    504 			printf("missing buffer, no_td = %d, last_td = %d\n",
    505 			    sc->sc_no_td, sc->sc_last_td);
    506 		}
    507 
    508 		IFQ_DEQUEUE(&ifp->if_snd, m);
    509 		if (m == 0)
    510 			break;
    511 
    512 		/*
    513 		 * If BPF is listening on this interface, let it see the packet
    514 		 * before we commit it to the wire.
    515 		 */
    516 		bpf_mtap(ifp, m);
    517 
    518 		/*
    519 		 * Copy the mbuf chain into the transmit buffer.
    520 		 */
    521 		len = lance_put(sc, LE_TBUFADDR(sc, bix), m);
    522 
    523 #ifdef LEDEBUG
    524 		if (len > ETHERMTU + sizeof(struct ether_header))
    525 			printf("packet length %d\n", len);
    526 #endif
    527 
    528 		ifp->if_timer = 5;
    529 
    530 		/*
    531 		 * Init transmit registers, and set transmit start flag.
    532 		 */
    533 		tmd.tmd1 = LE_T1_OWN | LE_T1_STP | LE_T1_ENP | LE_T1_ONES | (-len & 0xfff);
    534 		tmd.tmd2 = 0;
    535 		tmd.tmd3 = 0;
    536 
    537 		(*sc->sc_copytodesc)(sc, &tmd, rp, sizeof(tmd));
    538 
    539 #ifdef LEDEBUG
    540 		if (sc->sc_debug)
    541 			am79900_xmit_print(sc, sc->sc_last_td);
    542 #endif
    543 
    544 		(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_TDMD);
    545 
    546 		if (++bix == sc->sc_ntbuf)
    547 			bix = 0;
    548 
    549 		if (++sc->sc_no_td == sc->sc_ntbuf) {
    550 			ifp->if_flags |= IFF_OACTIVE;
    551 			break;
    552 		}
    553 
    554 	}
    555 
    556 	sc->sc_last_td = bix;
    557 }
    558 
    559 #ifdef LEDEBUG
    560 static void
    561 am79900_recv_print(struct lance_softc *sc, int no)
    562 {
    563 	struct lermd rmd;
    564 	uint16_t len;
    565 	struct ether_header eh;
    566 
    567 	(*sc->sc_copyfromdesc)(sc, &rmd, LE_RMDADDR(sc, no), sizeof(rmd));
    568 	len = (rmd.rmd2  & 0xfff) - 4;
    569 	printf("%s: receive buffer %d, len = %d\n",
    570 	    device_xname(sc->sc_dev), no, len);
    571 	printf("%s: status %04x\n", device_xname(sc->sc_dev),
    572 	    (*sc->sc_rdcsr)(sc, LE_CSR0));
    573 	printf("%s: adr %08x, flags/blen %08x\n",
    574 	    device_xname(sc->sc_dev), rmd.rmd0, rmd.rmd1);
    575 	if (len >= sizeof(eh)) {
    576 		(*sc->sc_copyfrombuf)(sc, &eh, LE_RBUFADDR(sc, no), sizeof(eh));
    577 		printf("%s: dst %s", device_xname(sc->sc_dev),
    578 			ether_sprintf(eh.ether_dhost));
    579 		printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
    580 			ntohs(eh.ether_type));
    581 	}
    582 }
    583 
    584 static void
    585 am79900_xmit_print(struct lance_softc *sc, int no)
    586 {
    587 	struct letmd tmd;
    588 	uint16_t len;
    589 	struct ether_header eh;
    590 
    591 	(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, no), sizeof(tmd));
    592 	len = -(tmd.tmd1 & 0xfff);
    593 	printf("%s: transmit buffer %d, len = %d\n",
    594 	    device_xname(sc->sc_dev), no, len);
    595 	printf("%s: status %04x\n", device_xname(sc->sc_dev),
    596 	    (*sc->sc_rdcsr)(sc, LE_CSR0));
    597 	printf("%s: adr %08x, flags/blen %08x\n",
    598 	    device_xname(sc->sc_dev), tmd.tmd0, tmd.tmd1);
    599 	if (len >= sizeof(eh)) {
    600 		(*sc->sc_copyfrombuf)(sc, &eh, LE_TBUFADDR(sc, no), sizeof(eh));
    601 		printf("%s: dst %s", device_xname(sc->sc_dev),
    602 			ether_sprintf(eh.ether_dhost));
    603 		printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
    604 		    ntohs(eh.ether_type));
    605 	}
    606 }
    607 #endif /* LEDEBUG */
    608