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      1 /*	$NetBSD: am79900.c,v 1.32 2022/09/25 18:43:32 thorpej 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 1.32 2022/09/25 18:43:32 thorpej 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/ioctl.h>
    115 #include <sys/errno.h>
    116 #include <sys/rndsource.h>
    117 
    118 #include <net/if.h>
    119 #include <net/if_dl.h>
    120 #include <net/if_ether.h>
    121 #include <net/if_media.h>
    122 #include <net/bpf.h>
    123 
    124 #include <dev/ic/lancereg.h>
    125 #include <dev/ic/lancevar.h>
    126 #include <dev/ic/am79900reg.h>
    127 #include <dev/ic/am79900var.h>
    128 
    129 static void	am79900_meminit(struct lance_softc *);
    130 static void	am79900_start(struct ifnet *);
    131 
    132 #if defined(_KERNEL_OPT)
    133 #include "opt_ddb.h"
    134 #endif
    135 
    136 #ifdef LEDEBUG
    137 static void	am79900_recv_print(struct lance_softc *, int);
    138 static void	am79900_xmit_print(struct lance_softc *, int);
    139 #endif
    140 
    141 #define	ifp	(&sc->sc_ethercom.ec_if)
    142 
    143 void
    144 am79900_config(struct am79900_softc *sc)
    145 {
    146 	int mem, i;
    147 
    148 	sc->lsc.sc_meminit = am79900_meminit;
    149 	sc->lsc.sc_start = am79900_start;
    150 
    151 	lance_config(&sc->lsc);
    152 	if_deferred_start_init(&sc->lsc.sc_ethercom.ec_if, NULL);
    153 
    154 	mem = 0;
    155 	sc->lsc.sc_initaddr = mem;
    156 	mem += sizeof(struct leinit);
    157 	sc->lsc.sc_rmdaddr = mem;
    158 	mem += sizeof(struct lermd) * sc->lsc.sc_nrbuf;
    159 	sc->lsc.sc_tmdaddr = mem;
    160 	mem += sizeof(struct letmd) * sc->lsc.sc_ntbuf;
    161 	for (i = 0; i < sc->lsc.sc_nrbuf; i++, mem += LEBLEN)
    162 		sc->lsc.sc_rbufaddr[i] = mem;
    163 	for (i = 0; i < sc->lsc.sc_ntbuf; i++, mem += LEBLEN)
    164 		sc->lsc.sc_tbufaddr[i] = mem;
    165 
    166 	if (mem > sc->lsc.sc_memsize)
    167 		panic("%s: memsize", device_xname(sc->lsc.sc_dev));
    168 }
    169 
    170 /*
    171  * Set up the initialization block and the descriptor rings.
    172  */
    173 static void
    174 am79900_meminit(struct lance_softc *sc)
    175 {
    176 	u_long a;
    177 	int bix;
    178 	struct leinit init;
    179 	struct lermd rmd;
    180 	struct letmd tmd;
    181 	uint8_t *myaddr;
    182 
    183 	if (ifp->if_flags & IFF_PROMISC)
    184 		init.init_mode = LE_MODE_NORMAL | LE_MODE_PROM;
    185 	else
    186 		init.init_mode = LE_MODE_NORMAL;
    187 	if (sc->sc_initmodemedia == 1)
    188 		init.init_mode |= LE_MODE_PSEL0;
    189 
    190 	init.init_mode |= ((ffs(sc->sc_ntbuf) - 1) << 28)
    191 	  | ((ffs(sc->sc_nrbuf) - 1) << 20);
    192 
    193 	/*
    194 	 * Update our private copy of the Ethernet address.
    195 	 * We NEED the copy so we can ensure its alignment!
    196 	 */
    197 	memcpy(sc->sc_enaddr, CLLADDR(ifp->if_sadl), ETHER_ADDR_LEN);
    198 	myaddr = sc->sc_enaddr;
    199 
    200 	init.init_padr[0] = myaddr[0] | (myaddr[1] << 8)
    201 	  | (myaddr[2] << 16) | (myaddr[3] << 24);
    202 	init.init_padr[1] = myaddr[4] | (myaddr[5] << 8);
    203 	lance_setladrf(&sc->sc_ethercom, init.init_ladrf);
    204 
    205 	sc->sc_last_rd = 0;
    206 	sc->sc_first_td = sc->sc_last_td = sc->sc_no_td = 0;
    207 
    208 	a = sc->sc_addr + LE_RMDADDR(sc, 0);
    209 	init.init_rdra = a;
    210 
    211 	a = sc->sc_addr + LE_TMDADDR(sc, 0);
    212 	init.init_tdra = a;
    213 
    214 	(*sc->sc_copytodesc)(sc, &init, LE_INITADDR(sc), sizeof(init));
    215 
    216 	/*
    217 	 * Set up receive ring descriptors.
    218 	 */
    219 	for (bix = 0; bix < sc->sc_nrbuf; bix++) {
    220 		a = sc->sc_addr + LE_RBUFADDR(sc, bix);
    221 		rmd.rmd0 = a;
    222 		rmd.rmd1 = LE_R1_OWN | LE_R1_ONES | (-LEBLEN & 0xfff);
    223 		rmd.rmd2 = 0;
    224 		rmd.rmd3 = 0;
    225 		(*sc->sc_copytodesc)(sc, &rmd, LE_RMDADDR(sc, bix),
    226 		    sizeof(rmd));
    227 	}
    228 
    229 	/*
    230 	 * Set up transmit ring descriptors.
    231 	 */
    232 	for (bix = 0; bix < sc->sc_ntbuf; bix++) {
    233 		a = sc->sc_addr + LE_TBUFADDR(sc, bix);
    234 		tmd.tmd0 = a;
    235 		tmd.tmd1 = LE_T1_ONES;
    236 		tmd.tmd2 = 0;
    237 		tmd.tmd3 = 0;
    238 		(*sc->sc_copytodesc)(sc, &tmd, LE_TMDADDR(sc, bix),
    239 		    sizeof(tmd));
    240 	}
    241 }
    242 
    243 static inline void
    244 am79900_rint(struct lance_softc *sc)
    245 {
    246 	int bix;
    247 	int rp;
    248 	struct lermd rmd;
    249 
    250 	bix = sc->sc_last_rd;
    251 
    252 	/* Process all buffers with valid data. */
    253 	for (;;) {
    254 		rp = LE_RMDADDR(sc, bix);
    255 		(*sc->sc_copyfromdesc)(sc, &rmd, rp, sizeof(rmd));
    256 
    257 		if (rmd.rmd1 & LE_R1_OWN)
    258 			break;
    259 
    260 		if (rmd.rmd1 & LE_R1_ERR) {
    261 			if (rmd.rmd1 & LE_R1_ENP) {
    262 #ifdef LEDEBUG
    263 				if ((rmd.rmd1 & LE_R1_OFLO) == 0) {
    264 					if (rmd.rmd1 & LE_R1_FRAM)
    265 						printf("%s: framing error\n",
    266 						    device_xname(sc->sc_dev));
    267 					if (rmd.rmd1 & LE_R1_CRC)
    268 						printf("%s: crc mismatch\n",
    269 						    device_xname(sc->sc_dev));
    270 				}
    271 #endif
    272 			} else {
    273 				if (rmd.rmd1 & LE_R1_OFLO)
    274 					printf("%s: overflow\n",
    275 					    device_xname(sc->sc_dev));
    276 			}
    277 			if (rmd.rmd1 & LE_R1_BUFF)
    278 				printf("%s: receive buffer error\n",
    279 				    device_xname(sc->sc_dev));
    280 			if_statinc(ifp, if_ierrors);
    281 		} else if ((rmd.rmd1 & (LE_R1_STP | LE_R1_ENP)) !=
    282 		    (LE_R1_STP | LE_R1_ENP)) {
    283 			printf("%s: dropping chained buffer\n",
    284 			    device_xname(sc->sc_dev));
    285 			if_statinc(ifp, if_ierrors);
    286 		} else {
    287 #ifdef LEDEBUG
    288 			if (sc->sc_debug)
    289 				am79900_recv_print(sc, sc->sc_last_rd);
    290 #endif
    291 			lance_read(sc, LE_RBUFADDR(sc, bix),
    292 				   (rmd.rmd2  & 0xfff) - 4);
    293 		}
    294 
    295 		rmd.rmd1 = LE_R1_OWN | LE_R1_ONES | (-LEBLEN & 0xfff);
    296 		rmd.rmd2 = 0;
    297 		rmd.rmd3 = 0;
    298 		(*sc->sc_copytodesc)(sc, &rmd, rp, sizeof(rmd));
    299 
    300 #ifdef LEDEBUG
    301 		if (sc->sc_debug)
    302 			printf("sc->sc_last_rd = %x, rmd: "
    303 			       "adr %08x, flags/blen %08x\n",
    304 				sc->sc_last_rd,
    305 				rmd.rmd0, rmd.rmd1);
    306 #endif
    307 
    308 		if (++bix == sc->sc_nrbuf)
    309 			bix = 0;
    310 	}
    311 
    312 	sc->sc_last_rd = bix;
    313 }
    314 
    315 static inline void
    316 am79900_tint(struct lance_softc *sc)
    317 {
    318 	int bix;
    319 	struct letmd tmd;
    320 
    321 	bix = sc->sc_first_td;
    322 
    323 	for (;;) {
    324 		if (sc->sc_no_td <= 0)
    325 			break;
    326 
    327 		(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, bix),
    328 		    sizeof(tmd));
    329 
    330 #ifdef LEDEBUG
    331 		if (sc->sc_debug)
    332 			printf("trans tmd: "
    333 			    "adr %08x, flags/blen %08x\n",
    334 			    tmd.tmd0, tmd.tmd1);
    335 #endif
    336 
    337 		if (tmd.tmd1 & LE_T1_OWN)
    338 			break;
    339 
    340 		if (tmd.tmd1 & LE_T1_ERR) {
    341 			if (tmd.tmd2 & LE_T2_BUFF)
    342 				printf("%s: transmit buffer error\n",
    343 				    device_xname(sc->sc_dev));
    344 			else if (tmd.tmd2 & LE_T2_UFLO)
    345 				printf("%s: underflow\n",
    346 				    device_xname(sc->sc_dev));
    347 			if (tmd.tmd2 & (LE_T2_BUFF | LE_T2_UFLO)) {
    348 				lance_reset(sc);
    349 				return;
    350 			}
    351 			if (tmd.tmd2 & LE_T2_LCAR) {
    352 				sc->sc_havecarrier = 0;
    353 				if (sc->sc_nocarrier)
    354 					(*sc->sc_nocarrier)(sc);
    355 				else
    356 					printf("%s: lost carrier\n",
    357 					    device_xname(sc->sc_dev));
    358 			}
    359 			if (tmd.tmd2 & LE_T2_LCOL)
    360 				if_statinc(ifp, if_collisions);
    361 			if (tmd.tmd2 & LE_T2_RTRY) {
    362 #ifdef LEDEBUG
    363 				printf("%s: excessive collisions\n",
    364 				    device_xname(sc->sc_dev));
    365 #endif
    366 				if_statadd(ifp, if_collisions, 16);
    367 			}
    368 			if_statinc(ifp, if_oerrors);
    369 		} else {
    370 			if (tmd.tmd1 & LE_T1_ONE)
    371 				if_statinc(ifp, if_collisions);
    372 			else if (tmd.tmd1 & LE_T1_MORE)
    373 				/* Real number is unknown. */
    374 				if_statadd(ifp, if_collisions, 2);
    375 			if_statinc(ifp, if_opackets);
    376 		}
    377 
    378 		if (++bix == sc->sc_ntbuf)
    379 			bix = 0;
    380 
    381 		--sc->sc_no_td;
    382 	}
    383 
    384 	sc->sc_first_td = bix;
    385 
    386 	if_schedule_deferred_start(ifp);
    387 
    388 	if (sc->sc_no_td == 0)
    389 		ifp->if_timer = 0;
    390 }
    391 
    392 /*
    393  * Controller interrupt.
    394  */
    395 int
    396 am79900_intr(void *arg)
    397 {
    398 	struct lance_softc *sc = arg;
    399 	uint16_t isr;
    400 
    401 	isr = (*sc->sc_rdcsr)(sc, LE_CSR0) | sc->sc_saved_csr0;
    402 	sc->sc_saved_csr0 = 0;
    403 #if defined(LEDEBUG) && LEDEBUG > 1
    404 	if (sc->sc_debug)
    405 		printf("%s: am79900_intr entering with isr=%04x\n",
    406 		    device_xname(sc->sc_dev), isr);
    407 #endif
    408 	if ((isr & LE_C0_INTR) == 0)
    409 		return (0);
    410 
    411 	(*sc->sc_wrcsr)(sc, LE_CSR0,
    412 	    isr & (LE_C0_INEA | LE_C0_BABL | LE_C0_MISS | LE_C0_MERR |
    413 		   LE_C0_RINT | LE_C0_TINT | LE_C0_IDON));
    414 	if (isr & LE_C0_ERR) {
    415 		if (isr & LE_C0_BABL) {
    416 #ifdef LEDEBUG
    417 			printf("%s: babble\n", device_xname(sc->sc_dev));
    418 #endif
    419 			if_statinc(ifp, if_oerrors);
    420 		}
    421 #if 0
    422 		if (isr & LE_C0_CERR) {
    423 			printf("%s: collision error\n",
    424 			    device_xname(sc->sc_dev));
    425 			if_statinc(ifp, if_collisions);
    426 		}
    427 #endif
    428 		if (isr & LE_C0_MISS) {
    429 #ifdef LEDEBUG
    430 			printf("%s: missed packet\n", device_xname(sc->sc_dev));
    431 #endif
    432 			if_statinc(ifp, if_ierrors);
    433 		}
    434 		if (isr & LE_C0_MERR) {
    435 			printf("%s: memory error\n", device_xname(sc->sc_dev));
    436 			lance_reset(sc);
    437 			return (1);
    438 		}
    439 	}
    440 
    441 	if ((isr & LE_C0_RXON) == 0) {
    442 		printf("%s: receiver disabled\n", device_xname(sc->sc_dev));
    443 		if_statinc(ifp, if_ierrors);
    444 		lance_reset(sc);
    445 		return (1);
    446 	}
    447 	if ((isr & LE_C0_TXON) == 0) {
    448 		printf("%s: transmitter disabled\n", device_xname(sc->sc_dev));
    449 		if_statinc(ifp, if_oerrors);
    450 		lance_reset(sc);
    451 		return (1);
    452 	}
    453 
    454 	/*
    455 	 * Pretend we have carrier; if we don't this will be cleared
    456 	 * shortly.
    457 	 */
    458 	const int ocarrier = sc->sc_havecarrier;
    459 	sc->sc_havecarrier = 1;
    460 
    461 	if (isr & LE_C0_RINT)
    462 		am79900_rint(sc);
    463 	if (isr & LE_C0_TINT)
    464 		am79900_tint(sc);
    465 
    466 	if (sc->sc_havecarrier != ocarrier)
    467 		if_link_state_change(ifp,
    468 		    sc->sc_havecarrier ? LINK_STATE_UP : LINK_STATE_DOWN);
    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_RUNNING)
    494 		return;
    495 
    496 	bix = sc->sc_last_td;
    497 
    498 	while (sc->sc_no_td < sc->sc_ntbuf) {
    499 		rp = LE_TMDADDR(sc, bix);
    500 		(*sc->sc_copyfromdesc)(sc, &tmd, rp, sizeof(tmd));
    501 
    502 		if (tmd.tmd1 & LE_T1_OWN) {
    503 			printf("%s: missing buffer, no_td = %d, last_td = %d\n",
    504 			    device_xname(sc->sc_dev), sc->sc_no_td,
    505 			    sc->sc_last_td);
    506 			break;
    507 		}
    508 
    509 		IFQ_DEQUEUE(&ifp->if_snd, m);
    510 		if (m == 0)
    511 			break;
    512 
    513 		/*
    514 		 * If BPF is listening on this interface, let it see the packet
    515 		 * before we commit it to the wire.
    516 		 */
    517 		bpf_mtap(ifp, m, BPF_D_OUT);
    518 
    519 		/*
    520 		 * Copy the mbuf chain into the transmit buffer.
    521 		 */
    522 		len = lance_put(sc, LE_TBUFADDR(sc, bix), m);
    523 
    524 #ifdef LEDEBUG
    525 		if (len > ETHERMTU + sizeof(struct ether_header))
    526 			printf("packet length %d\n", len);
    527 #endif
    528 
    529 		ifp->if_timer = 5;
    530 
    531 		/*
    532 		 * Init transmit registers, and set transmit start flag.
    533 		 */
    534 		tmd.tmd1 = LE_T1_OWN | LE_T1_STP | LE_T1_ENP | LE_T1_ONES | (-len & 0xfff);
    535 		tmd.tmd2 = 0;
    536 		tmd.tmd3 = 0;
    537 
    538 		(*sc->sc_copytodesc)(sc, &tmd, rp, sizeof(tmd));
    539 
    540 #ifdef LEDEBUG
    541 		if (sc->sc_debug)
    542 			am79900_xmit_print(sc, sc->sc_last_td);
    543 #endif
    544 
    545 		(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_TDMD);
    546 
    547 		if (++bix == sc->sc_ntbuf)
    548 			bix = 0;
    549 
    550 		sc->sc_no_td++;
    551 	}
    552 
    553 	sc->sc_last_td = bix;
    554 }
    555 
    556 #ifdef LEDEBUG
    557 static void
    558 am79900_recv_print(struct lance_softc *sc, int no)
    559 {
    560 	struct lermd rmd;
    561 	uint16_t len;
    562 	struct ether_header eh;
    563 
    564 	(*sc->sc_copyfromdesc)(sc, &rmd, LE_RMDADDR(sc, no), sizeof(rmd));
    565 	len = (rmd.rmd2  & 0xfff) - 4;
    566 	printf("%s: receive buffer %d, len = %d\n",
    567 	    device_xname(sc->sc_dev), no, len);
    568 	printf("%s: status %04x\n", device_xname(sc->sc_dev),
    569 	    (*sc->sc_rdcsr)(sc, LE_CSR0));
    570 	printf("%s: adr %08x, flags/blen %08x\n",
    571 	    device_xname(sc->sc_dev), rmd.rmd0, rmd.rmd1);
    572 	if (len >= sizeof(eh)) {
    573 		(*sc->sc_copyfrombuf)(sc, &eh, LE_RBUFADDR(sc, no), sizeof(eh));
    574 		printf("%s: dst %s", device_xname(sc->sc_dev),
    575 			ether_sprintf(eh.ether_dhost));
    576 		printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
    577 			ntohs(eh.ether_type));
    578 	}
    579 }
    580 
    581 static void
    582 am79900_xmit_print(struct lance_softc *sc, int no)
    583 {
    584 	struct letmd tmd;
    585 	uint16_t len;
    586 	struct ether_header eh;
    587 
    588 	(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, no), sizeof(tmd));
    589 	len = -(tmd.tmd1 & 0xfff);
    590 	printf("%s: transmit buffer %d, len = %d\n",
    591 	    device_xname(sc->sc_dev), no, len);
    592 	printf("%s: status %04x\n", device_xname(sc->sc_dev),
    593 	    (*sc->sc_rdcsr)(sc, LE_CSR0));
    594 	printf("%s: adr %08x, flags/blen %08x\n",
    595 	    device_xname(sc->sc_dev), tmd.tmd0, tmd.tmd1);
    596 	if (len >= sizeof(eh)) {
    597 		(*sc->sc_copyfrombuf)(sc, &eh, LE_TBUFADDR(sc, no), sizeof(eh));
    598 		printf("%s: dst %s", device_xname(sc->sc_dev),
    599 			ether_sprintf(eh.ether_dhost));
    600 		printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
    601 		    ntohs(eh.ether_type));
    602 	}
    603 }
    604 #endif /* LEDEBUG */
    605