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am79900.c revision 1.18.22.1
      1 /*	$NetBSD: am79900.c,v 1.18.22.1 2008/06/02 13:23:18 mjf 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 1.18.22.1 2008/06/02 13:23:18 mjf Exp $");
    107 
    108 #include "bpfilter.h"
    109 #include "rnd.h"
    110 
    111 #include <sys/param.h>
    112 #include <sys/systm.h>
    113 #include <sys/mbuf.h>
    114 #include <sys/syslog.h>
    115 #include <sys/socket.h>
    116 #include <sys/device.h>
    117 #include <sys/malloc.h>
    118 #include <sys/ioctl.h>
    119 #include <sys/errno.h>
    120 #if NRND > 0
    121 #include <sys/rnd.h>
    122 #endif
    123 
    124 #include <net/if.h>
    125 #include <net/if_dl.h>
    126 #include <net/if_ether.h>
    127 #include <net/if_media.h>
    128 
    129 #if NBPFILTER > 0
    130 #include <net/bpf.h>
    131 #include <net/bpfdesc.h>
    132 #endif
    133 
    134 #include <dev/ic/lancereg.h>
    135 #include <dev/ic/lancevar.h>
    136 #include <dev/ic/am79900reg.h>
    137 #include <dev/ic/am79900var.h>
    138 
    139 static void	am79900_meminit(struct lance_softc *);
    140 static void	am79900_start(struct ifnet *);
    141 
    142 #if defined(_KERNEL_OPT)
    143 #include "opt_ddb.h"
    144 #endif
    145 
    146 #ifdef LEDEBUG
    147 static void	am79900_recv_print(struct lance_softc *, int);
    148 static void	am79900_xmit_print(struct lance_softc *, int);
    149 #endif
    150 
    151 #define	ifp	(&sc->sc_ethercom.ec_if)
    152 
    153 void
    154 am79900_config(struct am79900_softc *sc)
    155 {
    156 	int mem, i;
    157 
    158 	sc->lsc.sc_meminit = am79900_meminit;
    159 	sc->lsc.sc_start = am79900_start;
    160 
    161 	lance_config(&sc->lsc);
    162 
    163 	mem = 0;
    164 	sc->lsc.sc_initaddr = mem;
    165 	mem += sizeof(struct leinit);
    166 	sc->lsc.sc_rmdaddr = mem;
    167 	mem += sizeof(struct lermd) * sc->lsc.sc_nrbuf;
    168 	sc->lsc.sc_tmdaddr = mem;
    169 	mem += sizeof(struct letmd) * sc->lsc.sc_ntbuf;
    170 	for (i = 0; i < sc->lsc.sc_nrbuf; i++, mem += LEBLEN)
    171 		sc->lsc.sc_rbufaddr[i] = mem;
    172 	for (i = 0; i < sc->lsc.sc_ntbuf; i++, mem += LEBLEN)
    173 		sc->lsc.sc_tbufaddr[i] = mem;
    174 
    175 	if (mem > sc->lsc.sc_memsize)
    176 		panic("%s: memsize", device_xname(sc->lsc.sc_dev));
    177 }
    178 
    179 /*
    180  * Set up the initialization block and the descriptor rings.
    181  */
    182 static void
    183 am79900_meminit(struct lance_softc *sc)
    184 {
    185 	u_long a;
    186 	int bix;
    187 	struct leinit init;
    188 	struct lermd rmd;
    189 	struct letmd tmd;
    190 	uint8_t *myaddr;
    191 
    192 #if NBPFILTER > 0
    193 	if (ifp->if_flags & IFF_PROMISC)
    194 		init.init_mode = LE_MODE_NORMAL | LE_MODE_PROM;
    195 	else
    196 #endif
    197 		init.init_mode = LE_MODE_NORMAL;
    198 	if (sc->sc_initmodemedia == 1)
    199 		init.init_mode |= LE_MODE_PSEL0;
    200 
    201 	init.init_mode |= ((ffs(sc->sc_ntbuf) - 1) << 28)
    202 	  | ((ffs(sc->sc_nrbuf) - 1) << 20);
    203 
    204 	/*
    205 	 * Update our private copy of the Ethernet address.
    206 	 * We NEED the copy so we can ensure its alignment!
    207 	 */
    208 	memcpy(sc->sc_enaddr, CLLADDR(ifp->if_sadl), ETHER_ADDR_LEN);
    209 	myaddr = sc->sc_enaddr;
    210 
    211 	init.init_padr[0] = myaddr[0] | (myaddr[1] << 8)
    212 	  | (myaddr[2] << 16) | (myaddr[3] << 24);
    213 	init.init_padr[1] = myaddr[4] | (myaddr[5] << 8);
    214 	lance_setladrf(&sc->sc_ethercom, init.init_ladrf);
    215 
    216 	sc->sc_last_rd = 0;
    217 	sc->sc_first_td = sc->sc_last_td = sc->sc_no_td = 0;
    218 
    219 	a = sc->sc_addr + LE_RMDADDR(sc, 0);
    220 	init.init_rdra = a;
    221 
    222 	a = sc->sc_addr + LE_TMDADDR(sc, 0);
    223 	init.init_tdra = a;
    224 
    225 	(*sc->sc_copytodesc)(sc, &init, LE_INITADDR(sc), sizeof(init));
    226 
    227 	/*
    228 	 * Set up receive ring descriptors.
    229 	 */
    230 	for (bix = 0; bix < sc->sc_nrbuf; bix++) {
    231 		a = sc->sc_addr + LE_RBUFADDR(sc, bix);
    232 		rmd.rmd0 = a;
    233 		rmd.rmd1 = LE_R1_OWN | LE_R1_ONES | (-LEBLEN & 0xfff);
    234 		rmd.rmd2 = 0;
    235 		rmd.rmd3 = 0;
    236 		(*sc->sc_copytodesc)(sc, &rmd, LE_RMDADDR(sc, bix),
    237 		    sizeof(rmd));
    238 	}
    239 
    240 	/*
    241 	 * Set up transmit ring descriptors.
    242 	 */
    243 	for (bix = 0; bix < sc->sc_ntbuf; bix++) {
    244 		a = sc->sc_addr + LE_TBUFADDR(sc, bix);
    245 		tmd.tmd0 = a;
    246 		tmd.tmd1 = LE_T1_ONES;
    247 		tmd.tmd2 = 0;
    248 		tmd.tmd3 = 0;
    249 		(*sc->sc_copytodesc)(sc, &tmd, LE_TMDADDR(sc, bix),
    250 		    sizeof(tmd));
    251 	}
    252 }
    253 
    254 static inline void
    255 am79900_rint(struct lance_softc *sc)
    256 {
    257 	int bix;
    258 	int rp;
    259 	struct lermd rmd;
    260 
    261 	bix = sc->sc_last_rd;
    262 
    263 	/* Process all buffers with valid data. */
    264 	for (;;) {
    265 		rp = LE_RMDADDR(sc, bix);
    266 		(*sc->sc_copyfromdesc)(sc, &rmd, rp, sizeof(rmd));
    267 
    268 		if (rmd.rmd1 & LE_R1_OWN)
    269 			break;
    270 
    271 		if (rmd.rmd1 & LE_R1_ERR) {
    272 			if (rmd.rmd1 & LE_R1_ENP) {
    273 #ifdef LEDEBUG
    274 				if ((rmd.rmd1 & LE_R1_OFLO) == 0) {
    275 					if (rmd.rmd1 & LE_R1_FRAM)
    276 						printf("%s: framing error\n",
    277 						    device_xname(sc->sc_dev));
    278 					if (rmd.rmd1 & LE_R1_CRC)
    279 						printf("%s: crc mismatch\n",
    280 						    device_xname(sc->sc_dev));
    281 				}
    282 #endif
    283 			} else {
    284 				if (rmd.rmd1 & LE_R1_OFLO)
    285 					printf("%s: overflow\n",
    286 					    device_xname(sc->sc_dev));
    287 			}
    288 			if (rmd.rmd1 & LE_R1_BUFF)
    289 				printf("%s: receive buffer error\n",
    290 				    device_xname(sc->sc_dev));
    291 			ifp->if_ierrors++;
    292 		} else if ((rmd.rmd1 & (LE_R1_STP | LE_R1_ENP)) !=
    293 		    (LE_R1_STP | LE_R1_ENP)) {
    294 			printf("%s: dropping chained buffer\n",
    295 			    device_xname(sc->sc_dev));
    296 			ifp->if_ierrors++;
    297 		} else {
    298 #ifdef LEDEBUG
    299 			if (sc->sc_debug)
    300 				am79900_recv_print(sc, sc->sc_last_rd);
    301 #endif
    302 			lance_read(sc, LE_RBUFADDR(sc, bix),
    303 				   (rmd.rmd2  & 0xfff) - 4);
    304 		}
    305 
    306 		rmd.rmd1 = LE_R1_OWN | LE_R1_ONES | (-LEBLEN & 0xfff);
    307 		rmd.rmd2 = 0;
    308 		rmd.rmd3 = 0;
    309 		(*sc->sc_copytodesc)(sc, &rmd, rp, sizeof(rmd));
    310 
    311 #ifdef LEDEBUG
    312 		if (sc->sc_debug)
    313 			printf("sc->sc_last_rd = %x, rmd: "
    314 			       "adr %08x, flags/blen %08x\n",
    315 				sc->sc_last_rd,
    316 				rmd.rmd0, rmd.rmd1);
    317 #endif
    318 
    319 		if (++bix == sc->sc_nrbuf)
    320 			bix = 0;
    321 	}
    322 
    323 	sc->sc_last_rd = bix;
    324 }
    325 
    326 static inline void
    327 am79900_tint(struct lance_softc *sc)
    328 {
    329 	int bix;
    330 	struct letmd tmd;
    331 
    332 	bix = sc->sc_first_td;
    333 
    334 	for (;;) {
    335 		if (sc->sc_no_td <= 0)
    336 			break;
    337 
    338 		(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, bix),
    339 		    sizeof(tmd));
    340 
    341 #ifdef LEDEBUG
    342 		if (sc->sc_debug)
    343 			printf("trans tmd: "
    344 			    "adr %08x, flags/blen %08x\n",
    345 			    tmd.tmd0, tmd.tmd1);
    346 #endif
    347 
    348 		if (tmd.tmd1 & LE_T1_OWN)
    349 			break;
    350 
    351 		ifp->if_flags &= ~IFF_OACTIVE;
    352 
    353 		if (tmd.tmd1 & LE_T1_ERR) {
    354 			if (tmd.tmd2 & LE_T2_BUFF)
    355 				printf("%s: transmit buffer error\n",
    356 				    device_xname(sc->sc_dev));
    357 			else if (tmd.tmd2 & LE_T2_UFLO)
    358 				printf("%s: underflow\n",
    359 				    device_xname(sc->sc_dev));
    360 			if (tmd.tmd2 & (LE_T2_BUFF | LE_T2_UFLO)) {
    361 				lance_reset(sc);
    362 				return;
    363 			}
    364 			if (tmd.tmd2 & LE_T2_LCAR) {
    365 				sc->sc_havecarrier = 0;
    366 				if (sc->sc_nocarrier)
    367 					(*sc->sc_nocarrier)(sc);
    368 				else
    369 					printf("%s: lost carrier\n",
    370 					    device_xname(sc->sc_dev));
    371 			}
    372 			if (tmd.tmd2 & LE_T2_LCOL)
    373 				ifp->if_collisions++;
    374 			if (tmd.tmd2 & LE_T2_RTRY) {
    375 #ifdef LEDEBUG
    376 				printf("%s: excessive collisions\n",
    377 				    device_xname(sc->sc_dev));
    378 #endif
    379 				ifp->if_collisions += 16;
    380 			}
    381 			ifp->if_oerrors++;
    382 		} else {
    383 			if (tmd.tmd1 & LE_T1_ONE)
    384 				ifp->if_collisions++;
    385 			else if (tmd.tmd1 & LE_T1_MORE)
    386 				/* Real number is unknown. */
    387 				ifp->if_collisions += 2;
    388 			ifp->if_opackets++;
    389 		}
    390 
    391 		if (++bix == sc->sc_ntbuf)
    392 			bix = 0;
    393 
    394 		--sc->sc_no_td;
    395 	}
    396 
    397 	sc->sc_first_td = bix;
    398 
    399 	am79900_start(ifp);
    400 
    401 	if (sc->sc_no_td == 0)
    402 		ifp->if_timer = 0;
    403 }
    404 
    405 /*
    406  * Controller interrupt.
    407  */
    408 int
    409 am79900_intr(void *arg)
    410 {
    411 	struct lance_softc *sc = arg;
    412 	uint16_t isr;
    413 
    414 	isr = (*sc->sc_rdcsr)(sc, LE_CSR0) | sc->sc_saved_csr0;
    415 	sc->sc_saved_csr0 = 0;
    416 #if defined(LEDEBUG) && LEDEBUG > 1
    417 	if (sc->sc_debug)
    418 		printf("%s: am79900_intr entering with isr=%04x\n",
    419 		    device_xname(sc->sc_dev), isr);
    420 #endif
    421 	if ((isr & LE_C0_INTR) == 0)
    422 		return (0);
    423 
    424 	(*sc->sc_wrcsr)(sc, LE_CSR0,
    425 	    isr & (LE_C0_INEA | LE_C0_BABL | LE_C0_MISS | LE_C0_MERR |
    426 		   LE_C0_RINT | LE_C0_TINT | LE_C0_IDON));
    427 	if (isr & LE_C0_ERR) {
    428 		if (isr & LE_C0_BABL) {
    429 #ifdef LEDEBUG
    430 			printf("%s: babble\n", device_xname(sc->sc_dev));
    431 #endif
    432 			ifp->if_oerrors++;
    433 		}
    434 #if 0
    435 		if (isr & LE_C0_CERR) {
    436 			printf("%s: collision error\n",
    437 			    device_xname(sc->sc_dev));
    438 			ifp->if_collisions++;
    439 		}
    440 #endif
    441 		if (isr & LE_C0_MISS) {
    442 #ifdef LEDEBUG
    443 			printf("%s: missed packet\n", device_xname(sc->sc_dev));
    444 #endif
    445 			ifp->if_ierrors++;
    446 		}
    447 		if (isr & LE_C0_MERR) {
    448 			printf("%s: memory error\n", device_xname(sc->sc_dev));
    449 			lance_reset(sc);
    450 			return (1);
    451 		}
    452 	}
    453 
    454 	if ((isr & LE_C0_RXON) == 0) {
    455 		printf("%s: receiver disabled\n", device_xname(sc->sc_dev));
    456 		ifp->if_ierrors++;
    457 		lance_reset(sc);
    458 		return (1);
    459 	}
    460 	if ((isr & LE_C0_TXON) == 0) {
    461 		printf("%s: transmitter disabled\n", device_xname(sc->sc_dev));
    462 		ifp->if_oerrors++;
    463 		lance_reset(sc);
    464 		return (1);
    465 	}
    466 
    467 	/*
    468 	 * Pretend we have carrier; if we don't this will be cleared
    469 	 * shortly.
    470 	 */
    471 	sc->sc_havecarrier = 1;
    472 
    473 	if (isr & LE_C0_RINT)
    474 		am79900_rint(sc);
    475 	if (isr & LE_C0_TINT)
    476 		am79900_tint(sc);
    477 
    478 #if NRND > 0
    479 	rnd_add_uint32(&sc->rnd_source, isr);
    480 #endif
    481 
    482 	return (1);
    483 }
    484 
    485 #undef	ifp
    486 
    487 /*
    488  * Setup output on interface.
    489  * Get another datagram to send off of the interface queue, and map it to the
    490  * interface before starting the output.
    491  * Called only at splnet or interrupt level.
    492  */
    493 static void
    494 am79900_start(struct ifnet *ifp)
    495 {
    496 	struct lance_softc *sc = ifp->if_softc;
    497 	int bix;
    498 	struct mbuf *m;
    499 	struct letmd tmd;
    500 	int rp;
    501 	int len;
    502 
    503 	if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
    504 		return;
    505 
    506 	bix = sc->sc_last_td;
    507 
    508 	for (;;) {
    509 		rp = LE_TMDADDR(sc, bix);
    510 		(*sc->sc_copyfromdesc)(sc, &tmd, rp, sizeof(tmd));
    511 
    512 		if (tmd.tmd1 & LE_T1_OWN) {
    513 			ifp->if_flags |= IFF_OACTIVE;
    514 			printf("missing buffer, no_td = %d, last_td = %d\n",
    515 			    sc->sc_no_td, sc->sc_last_td);
    516 		}
    517 
    518 		IFQ_DEQUEUE(&ifp->if_snd, m);
    519 		if (m == 0)
    520 			break;
    521 
    522 #if NBPFILTER > 0
    523 		/*
    524 		 * If BPF is listening on this interface, let it see the packet
    525 		 * before we commit it to the wire.
    526 		 */
    527 		if (ifp->if_bpf)
    528 			bpf_mtap(ifp->if_bpf, m);
    529 #endif
    530 
    531 		/*
    532 		 * Copy the mbuf chain into the transmit buffer.
    533 		 */
    534 		len = lance_put(sc, LE_TBUFADDR(sc, bix), m);
    535 
    536 #ifdef LEDEBUG
    537 		if (len > ETHERMTU + sizeof(struct ether_header))
    538 			printf("packet length %d\n", len);
    539 #endif
    540 
    541 		ifp->if_timer = 5;
    542 
    543 		/*
    544 		 * Init transmit registers, and set transmit start flag.
    545 		 */
    546 		tmd.tmd1 = LE_T1_OWN | LE_T1_STP | LE_T1_ENP | LE_T1_ONES | (-len & 0xfff);
    547 		tmd.tmd2 = 0;
    548 		tmd.tmd3 = 0;
    549 
    550 		(*sc->sc_copytodesc)(sc, &tmd, rp, sizeof(tmd));
    551 
    552 #ifdef LEDEBUG
    553 		if (sc->sc_debug)
    554 			am79900_xmit_print(sc, sc->sc_last_td);
    555 #endif
    556 
    557 		(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_TDMD);
    558 
    559 		if (++bix == sc->sc_ntbuf)
    560 			bix = 0;
    561 
    562 		if (++sc->sc_no_td == sc->sc_ntbuf) {
    563 			ifp->if_flags |= IFF_OACTIVE;
    564 			break;
    565 		}
    566 
    567 	}
    568 
    569 	sc->sc_last_td = bix;
    570 }
    571 
    572 #ifdef LEDEBUG
    573 static void
    574 am79900_recv_print(struct lance_softc *sc, int no)
    575 {
    576 	struct lermd rmd;
    577 	uint16_t len;
    578 	struct ether_header eh;
    579 
    580 	(*sc->sc_copyfromdesc)(sc, &rmd, LE_RMDADDR(sc, no), sizeof(rmd));
    581 	len = (rmd.rmd2  & 0xfff) - 4;
    582 	printf("%s: receive buffer %d, len = %d\n",
    583 	    device_xname(sc->sc_dev), no, len);
    584 	printf("%s: status %04x\n", device_xname(sc->sc_dev),
    585 	    (*sc->sc_rdcsr)(sc, LE_CSR0));
    586 	printf("%s: adr %08x, flags/blen %08x\n",
    587 	    device_xname(sc->sc_dev), rmd.rmd0, rmd.rmd1);
    588 	if (len >= sizeof(eh)) {
    589 		(*sc->sc_copyfrombuf)(sc, &eh, LE_RBUFADDR(sc, no), sizeof(eh));
    590 		printf("%s: dst %s", device_xname(sc->sc_dev),
    591 			ether_sprintf(eh.ether_dhost));
    592 		printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
    593 			ntohs(eh.ether_type));
    594 	}
    595 }
    596 
    597 static void
    598 am79900_xmit_print(struct lance_softc *sc, int no)
    599 {
    600 	struct letmd tmd;
    601 	uint16_t len;
    602 	struct ether_header eh;
    603 
    604 	(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, no), sizeof(tmd));
    605 	len = -(tmd.tmd1 & 0xfff);
    606 	printf("%s: transmit buffer %d, len = %d\n",
    607 	    device_xname(sc->sc_dev), no, len);
    608 	printf("%s: status %04x\n", device_xname(sc->sc_dev),
    609 	    (*sc->sc_rdcsr)(sc, LE_CSR0));
    610 	printf("%s: adr %08x, flags/blen %08x\n",
    611 	    device_xname(sc->sc_dev), tmd.tmd0, tmd.tmd1);
    612 	if (len >= sizeof(eh)) {
    613 		(*sc->sc_copyfrombuf)(sc, &eh, LE_TBUFADDR(sc, no), sizeof(eh));
    614 		printf("%s: dst %s", device_xname(sc->sc_dev),
    615 			ether_sprintf(eh.ether_dhost));
    616 		printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
    617 		    ntohs(eh.ether_type));
    618 	}
    619 }
    620 #endif /* LEDEBUG */
    621