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am79900.c revision 1.14
      1 /*	$NetBSD: am79900.c,v 1.14 2004/08/24 00:53:29 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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the NetBSD
     21  *	Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 /*-
     40  * Copyright (c) 1992, 1993
     41  *	The Regents of the University of California.  All rights reserved.
     42  *
     43  * This code is derived from software contributed to Berkeley by
     44  * Ralph Campbell and Rick Macklem.
     45  *
     46  * Redistribution and use in source and binary forms, with or without
     47  * modification, are permitted provided that the following conditions
     48  * are met:
     49  * 1. Redistributions of source code must retain the above copyright
     50  *    notice, this list of conditions and the following disclaimer.
     51  * 2. Redistributions in binary form must reproduce the above copyright
     52  *    notice, this list of conditions and the following disclaimer in the
     53  *    documentation and/or other materials provided with the distribution.
     54  * 3. Neither the name of the University nor the names of its contributors
     55  *    may be used to endorse or promote products derived from this software
     56  *    without specific prior written permission.
     57  *
     58  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     59  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     60  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     61  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     62  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     63  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     64  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     65  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     66  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     67  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     68  * SUCH DAMAGE.
     69  *
     70  *	@(#)if_le.c	8.2 (Berkeley) 11/16/93
     71  */
     72 
     73 /*-
     74  * Copyright (c) 1998
     75  *	Matthias Drochner.  All rights reserved.
     76  * Copyright (c) 1995 Charles M. Hannum.  All rights reserved.
     77  *
     78  * This code is derived from software contributed to Berkeley by
     79  * Ralph Campbell and Rick Macklem.
     80  *
     81  * Redistribution and use in source and binary forms, with or without
     82  * modification, are permitted provided that the following conditions
     83  * are met:
     84  * 1. Redistributions of source code must retain the above copyright
     85  *    notice, this list of conditions and the following disclaimer.
     86  * 2. Redistributions in binary form must reproduce the above copyright
     87  *    notice, this list of conditions and the following disclaimer in the
     88  *    documentation and/or other materials provided with the distribution.
     89  * 3. All advertising materials mentioning features or use of this software
     90  *    must display the following acknowledgement:
     91  *	This product includes software developed by the University of
     92  *	California, Berkeley and its contributors.
     93  * 4. Neither the name of the University nor the names of its contributors
     94  *    may be used to endorse or promote products derived from this software
     95  *    without specific prior written permission.
     96  *
     97  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     98  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     99  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    100  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
    101  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    102  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
    103  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    104  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
    105  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
    106  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    107  * SUCH DAMAGE.
    108  *
    109  *	@(#)if_le.c	8.2 (Berkeley) 11/16/93
    110  */
    111 
    112 #include <sys/cdefs.h>
    113 __KERNEL_RCSID(0, "$NetBSD: am79900.c,v 1.14 2004/08/24 00:53:29 thorpej Exp $");
    114 
    115 #include "bpfilter.h"
    116 #include "rnd.h"
    117 
    118 #include <sys/param.h>
    119 #include <sys/systm.h>
    120 #include <sys/mbuf.h>
    121 #include <sys/syslog.h>
    122 #include <sys/socket.h>
    123 #include <sys/device.h>
    124 #include <sys/malloc.h>
    125 #include <sys/ioctl.h>
    126 #include <sys/errno.h>
    127 #if NRND > 0
    128 #include <sys/rnd.h>
    129 #endif
    130 
    131 #include <net/if.h>
    132 #include <net/if_dl.h>
    133 #include <net/if_ether.h>
    134 #include <net/if_media.h>
    135 
    136 #if NBPFILTER > 0
    137 #include <net/bpf.h>
    138 #include <net/bpfdesc.h>
    139 #endif
    140 
    141 #include <dev/ic/lancereg.h>
    142 #include <dev/ic/lancevar.h>
    143 #include <dev/ic/am79900reg.h>
    144 #include <dev/ic/am79900var.h>
    145 
    146 static void	am79900_meminit(struct lance_softc *);
    147 static void	am79900_start(struct ifnet *);
    148 
    149 #if defined(_KERNEL_OPT)
    150 #include "opt_ddb.h"
    151 #endif
    152 
    153 #ifdef LEDEBUG
    154 static void	am79900_recv_print(struct lance_softc *, int);
    155 static void	am79900_xmit_print(struct lance_softc *, int);
    156 #endif
    157 
    158 #define	ifp	(&sc->sc_ethercom.ec_if)
    159 
    160 void
    161 am79900_config(struct am79900_softc *sc)
    162 {
    163 	int mem, i;
    164 
    165 	sc->lsc.sc_meminit = am79900_meminit;
    166 	sc->lsc.sc_start = am79900_start;
    167 
    168 	lance_config(&sc->lsc);
    169 
    170 	mem = 0;
    171 	sc->lsc.sc_initaddr = mem;
    172 	mem += sizeof(struct leinit);
    173 	sc->lsc.sc_rmdaddr = mem;
    174 	mem += sizeof(struct lermd) * sc->lsc.sc_nrbuf;
    175 	sc->lsc.sc_tmdaddr = mem;
    176 	mem += sizeof(struct letmd) * sc->lsc.sc_ntbuf;
    177 	for (i = 0; i < sc->lsc.sc_nrbuf; i++, mem += LEBLEN)
    178 		sc->lsc.sc_rbufaddr[i] = mem;
    179 	for (i = 0; i < sc->lsc.sc_ntbuf; i++, mem += LEBLEN)
    180 		sc->lsc.sc_tbufaddr[i] = mem;
    181 
    182 	if (mem > sc->lsc.sc_memsize)
    183 		panic("%s: memsize", sc->lsc.sc_dev.dv_xname);
    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 	u_long a;
    193 	int bix;
    194 	struct leinit init;
    195 	struct lermd rmd;
    196 	struct letmd tmd;
    197 	u_int8_t *myaddr;
    198 
    199 #if NBPFILTER > 0
    200 	if (ifp->if_flags & IFF_PROMISC)
    201 		init.init_mode = LE_MODE_NORMAL | LE_MODE_PROM;
    202 	else
    203 #endif
    204 		init.init_mode = LE_MODE_NORMAL;
    205 	if (sc->sc_initmodemedia == 1)
    206 		init.init_mode |= LE_MODE_PSEL0;
    207 
    208 	init.init_mode |= ((ffs(sc->sc_ntbuf) - 1) << 28)
    209 	  | ((ffs(sc->sc_nrbuf) - 1) << 20);
    210 
    211 	/*
    212 	 * Update our private copy of the Ethernet address.
    213 	 * We NEED the copy so we can ensure its alignment!
    214 	 */
    215 	memcpy(sc->sc_enaddr, LLADDR(ifp->if_sadl), ETHER_ADDR_LEN);
    216 	myaddr = sc->sc_enaddr;
    217 
    218 	init.init_padr[0] = myaddr[0] | (myaddr[1] << 8)
    219 	  | (myaddr[2] << 16) | (myaddr[3] << 24);
    220 	init.init_padr[1] = myaddr[4] | (myaddr[5] << 8);
    221 	lance_setladrf(&sc->sc_ethercom, init.init_ladrf);
    222 
    223 	sc->sc_last_rd = 0;
    224 	sc->sc_first_td = sc->sc_last_td = sc->sc_no_td = 0;
    225 
    226 	a = sc->sc_addr + LE_RMDADDR(sc, 0);
    227 	init.init_rdra = a;
    228 
    229 	a = sc->sc_addr + LE_TMDADDR(sc, 0);
    230 	init.init_tdra = a;
    231 
    232 	(*sc->sc_copytodesc)(sc, &init, LE_INITADDR(sc), sizeof(init));
    233 
    234 	/*
    235 	 * Set up receive ring descriptors.
    236 	 */
    237 	for (bix = 0; bix < sc->sc_nrbuf; bix++) {
    238 		a = sc->sc_addr + LE_RBUFADDR(sc, bix);
    239 		rmd.rmd0 = a;
    240 		rmd.rmd1 = LE_R1_OWN | LE_R1_ONES | (-LEBLEN & 0xfff);
    241 		rmd.rmd2 = 0;
    242 		rmd.rmd3 = 0;
    243 		(*sc->sc_copytodesc)(sc, &rmd, LE_RMDADDR(sc, bix),
    244 		    sizeof(rmd));
    245 	}
    246 
    247 	/*
    248 	 * Set up transmit ring descriptors.
    249 	 */
    250 	for (bix = 0; bix < sc->sc_ntbuf; bix++) {
    251 		a = sc->sc_addr + LE_TBUFADDR(sc, bix);
    252 		tmd.tmd0 = a;
    253 		tmd.tmd1 = LE_T1_ONES;
    254 		tmd.tmd2 = 0;
    255 		tmd.tmd3 = 0;
    256 		(*sc->sc_copytodesc)(sc, &tmd, LE_TMDADDR(sc, bix),
    257 		    sizeof(tmd));
    258 	}
    259 }
    260 
    261 static __inline void
    262 am79900_rint(struct lance_softc *sc)
    263 {
    264 	int bix;
    265 	int rp;
    266 	struct lermd rmd;
    267 
    268 	bix = sc->sc_last_rd;
    269 
    270 	/* Process all buffers with valid data. */
    271 	for (;;) {
    272 		rp = LE_RMDADDR(sc, bix);
    273 		(*sc->sc_copyfromdesc)(sc, &rmd, rp, sizeof(rmd));
    274 
    275 		if (rmd.rmd1 & LE_R1_OWN)
    276 			break;
    277 
    278 		if (rmd.rmd1 & LE_R1_ERR) {
    279 			if (rmd.rmd1 & LE_R1_ENP) {
    280 #ifdef LEDEBUG
    281 				if ((rmd.rmd1 & LE_R1_OFLO) == 0) {
    282 					if (rmd.rmd1 & LE_R1_FRAM)
    283 						printf("%s: framing error\n",
    284 						    sc->sc_dev.dv_xname);
    285 					if (rmd.rmd1 & LE_R1_CRC)
    286 						printf("%s: crc mismatch\n",
    287 						    sc->sc_dev.dv_xname);
    288 				}
    289 #endif
    290 			} else {
    291 				if (rmd.rmd1 & LE_R1_OFLO)
    292 					printf("%s: overflow\n",
    293 					    sc->sc_dev.dv_xname);
    294 			}
    295 			if (rmd.rmd1 & LE_R1_BUFF)
    296 				printf("%s: receive buffer error\n",
    297 				    sc->sc_dev.dv_xname);
    298 			ifp->if_ierrors++;
    299 		} else if ((rmd.rmd1 & (LE_R1_STP | LE_R1_ENP)) !=
    300 		    (LE_R1_STP | LE_R1_ENP)) {
    301 			printf("%s: dropping chained buffer\n",
    302 			    sc->sc_dev.dv_xname);
    303 			ifp->if_ierrors++;
    304 		} else {
    305 #ifdef LEDEBUG
    306 			if (sc->sc_debug)
    307 				am79900_recv_print(sc, sc->sc_last_rd);
    308 #endif
    309 			lance_read(sc, LE_RBUFADDR(sc, bix),
    310 				   (rmd.rmd2  & 0xfff) - 4);
    311 		}
    312 
    313 		rmd.rmd1 = LE_R1_OWN | LE_R1_ONES | (-LEBLEN & 0xfff);
    314 		rmd.rmd2 = 0;
    315 		rmd.rmd3 = 0;
    316 		(*sc->sc_copytodesc)(sc, &rmd, rp, sizeof(rmd));
    317 
    318 #ifdef LEDEBUG
    319 		if (sc->sc_debug)
    320 			printf("sc->sc_last_rd = %x, rmd: "
    321 			       "adr %08x, flags/blen %08x\n",
    322 				sc->sc_last_rd,
    323 				rmd.rmd0, rmd.rmd1);
    324 #endif
    325 
    326 		if (++bix == sc->sc_nrbuf)
    327 			bix = 0;
    328 	}
    329 
    330 	sc->sc_last_rd = bix;
    331 }
    332 
    333 static __inline void
    334 am79900_tint(struct lance_softc *sc)
    335 {
    336 	int bix;
    337 	struct letmd tmd;
    338 
    339 	bix = sc->sc_first_td;
    340 
    341 	for (;;) {
    342 		if (sc->sc_no_td <= 0)
    343 			break;
    344 
    345 		(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, bix),
    346 		    sizeof(tmd));
    347 
    348 #ifdef LEDEBUG
    349 		if (sc->sc_debug)
    350 			printf("trans tmd: "
    351 			    "adr %08x, flags/blen %08x\n",
    352 			    tmd.tmd0, tmd.tmd1);
    353 #endif
    354 
    355 		if (tmd.tmd1 & LE_T1_OWN)
    356 			break;
    357 
    358 		ifp->if_flags &= ~IFF_OACTIVE;
    359 
    360 		if (tmd.tmd1 & LE_T1_ERR) {
    361 			if (tmd.tmd2 & LE_T2_BUFF)
    362 				printf("%s: transmit buffer error\n",
    363 				    sc->sc_dev.dv_xname);
    364 			else if (tmd.tmd2 & LE_T2_UFLO)
    365 				printf("%s: underflow\n", sc->sc_dev.dv_xname);
    366 			if (tmd.tmd2 & (LE_T2_BUFF | LE_T2_UFLO)) {
    367 				lance_reset(sc);
    368 				return;
    369 			}
    370 			if (tmd.tmd2 & LE_T2_LCAR) {
    371 				sc->sc_havecarrier = 0;
    372 				if (sc->sc_nocarrier)
    373 					(*sc->sc_nocarrier)(sc);
    374 				else
    375 					printf("%s: lost carrier\n",
    376 					    sc->sc_dev.dv_xname);
    377 			}
    378 			if (tmd.tmd2 & LE_T2_LCOL)
    379 				ifp->if_collisions++;
    380 			if (tmd.tmd2 & LE_T2_RTRY) {
    381 #ifdef LEDEBUG
    382 				printf("%s: excessive collisions\n",
    383 				    sc->sc_dev.dv_xname);
    384 #endif
    385 				ifp->if_collisions += 16;
    386 			}
    387 			ifp->if_oerrors++;
    388 		} else {
    389 			if (tmd.tmd1 & LE_T1_ONE)
    390 				ifp->if_collisions++;
    391 			else if (tmd.tmd1 & LE_T1_MORE)
    392 				/* Real number is unknown. */
    393 				ifp->if_collisions += 2;
    394 			ifp->if_opackets++;
    395 		}
    396 
    397 		if (++bix == sc->sc_ntbuf)
    398 			bix = 0;
    399 
    400 		--sc->sc_no_td;
    401 	}
    402 
    403 	sc->sc_first_td = bix;
    404 
    405 	am79900_start(ifp);
    406 
    407 	if (sc->sc_no_td == 0)
    408 		ifp->if_timer = 0;
    409 }
    410 
    411 /*
    412  * Controller interrupt.
    413  */
    414 int
    415 am79900_intr(void *arg)
    416 {
    417 	struct lance_softc *sc = arg;
    418 	u_int16_t isr;
    419 
    420 	isr = (*sc->sc_rdcsr)(sc, LE_CSR0) | sc->sc_saved_csr0;
    421 	sc->sc_saved_csr0 = 0;
    422 #if defined(LEDEBUG) && LEDEBUG > 1
    423 	if (sc->sc_debug)
    424 		printf("%s: am79900_intr entering with isr=%04x\n",
    425 		    sc->sc_dev.dv_xname, isr);
    426 #endif
    427 	if ((isr & LE_C0_INTR) == 0)
    428 		return (0);
    429 
    430 	(*sc->sc_wrcsr)(sc, LE_CSR0,
    431 	    isr & (LE_C0_INEA | LE_C0_BABL | LE_C0_MISS | LE_C0_MERR |
    432 		   LE_C0_RINT | LE_C0_TINT | LE_C0_IDON));
    433 	if (isr & LE_C0_ERR) {
    434 		if (isr & LE_C0_BABL) {
    435 #ifdef LEDEBUG
    436 			printf("%s: babble\n", sc->sc_dev.dv_xname);
    437 #endif
    438 			ifp->if_oerrors++;
    439 		}
    440 #if 0
    441 		if (isr & LE_C0_CERR) {
    442 			printf("%s: collision error\n", sc->sc_dev.dv_xname);
    443 			ifp->if_collisions++;
    444 		}
    445 #endif
    446 		if (isr & LE_C0_MISS) {
    447 #ifdef LEDEBUG
    448 			printf("%s: missed packet\n", sc->sc_dev.dv_xname);
    449 #endif
    450 			ifp->if_ierrors++;
    451 		}
    452 		if (isr & LE_C0_MERR) {
    453 			printf("%s: memory error\n", sc->sc_dev.dv_xname);
    454 			lance_reset(sc);
    455 			return (1);
    456 		}
    457 	}
    458 
    459 	if ((isr & LE_C0_RXON) == 0) {
    460 		printf("%s: receiver disabled\n", sc->sc_dev.dv_xname);
    461 		ifp->if_ierrors++;
    462 		lance_reset(sc);
    463 		return (1);
    464 	}
    465 	if ((isr & LE_C0_TXON) == 0) {
    466 		printf("%s: transmitter disabled\n", sc->sc_dev.dv_xname);
    467 		ifp->if_oerrors++;
    468 		lance_reset(sc);
    469 		return (1);
    470 	}
    471 
    472 	/*
    473 	 * Pretend we have carrier; if we don't this will be cleared
    474 	 * shortly.
    475 	 */
    476 	sc->sc_havecarrier = 1;
    477 
    478 	if (isr & LE_C0_RINT)
    479 		am79900_rint(sc);
    480 	if (isr & LE_C0_TINT)
    481 		am79900_tint(sc);
    482 
    483 #if NRND > 0
    484 	rnd_add_uint32(&sc->rnd_source, isr);
    485 #endif
    486 
    487 	return (1);
    488 }
    489 
    490 #undef	ifp
    491 
    492 /*
    493  * Setup output on interface.
    494  * Get another datagram to send off of the interface queue, and map it to the
    495  * interface before starting the output.
    496  * Called only at splnet or interrupt level.
    497  */
    498 static void
    499 am79900_start(struct ifnet *ifp)
    500 {
    501 	struct lance_softc *sc = ifp->if_softc;
    502 	int bix;
    503 	struct mbuf *m;
    504 	struct letmd tmd;
    505 	int rp;
    506 	int len;
    507 
    508 	if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
    509 		return;
    510 
    511 	bix = sc->sc_last_td;
    512 
    513 	for (;;) {
    514 		rp = LE_TMDADDR(sc, bix);
    515 		(*sc->sc_copyfromdesc)(sc, &tmd, rp, sizeof(tmd));
    516 
    517 		if (tmd.tmd1 & LE_T1_OWN) {
    518 			ifp->if_flags |= IFF_OACTIVE;
    519 			printf("missing buffer, no_td = %d, last_td = %d\n",
    520 			    sc->sc_no_td, sc->sc_last_td);
    521 		}
    522 
    523 		IFQ_DEQUEUE(&ifp->if_snd, m);
    524 		if (m == 0)
    525 			break;
    526 
    527 #if NBPFILTER > 0
    528 		/*
    529 		 * If BPF is listening on this interface, let it see the packet
    530 		 * before we commit it to the wire.
    531 		 */
    532 		if (ifp->if_bpf)
    533 			bpf_mtap(ifp->if_bpf, m);
    534 #endif
    535 
    536 		/*
    537 		 * Copy the mbuf chain into the transmit buffer.
    538 		 */
    539 		len = lance_put(sc, LE_TBUFADDR(sc, bix), m);
    540 
    541 #ifdef LEDEBUG
    542 		if (len > ETHERMTU + sizeof(struct ether_header))
    543 			printf("packet length %d\n", len);
    544 #endif
    545 
    546 		ifp->if_timer = 5;
    547 
    548 		/*
    549 		 * Init transmit registers, and set transmit start flag.
    550 		 */
    551 		tmd.tmd1 = LE_T1_OWN | LE_T1_STP | LE_T1_ENP | LE_T1_ONES | (-len & 0xfff);
    552 		tmd.tmd2 = 0;
    553 		tmd.tmd3 = 0;
    554 
    555 		(*sc->sc_copytodesc)(sc, &tmd, rp, sizeof(tmd));
    556 
    557 #ifdef LEDEBUG
    558 		if (sc->sc_debug)
    559 			am79900_xmit_print(sc, sc->sc_last_td);
    560 #endif
    561 
    562 		(*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_TDMD);
    563 
    564 		if (++bix == sc->sc_ntbuf)
    565 			bix = 0;
    566 
    567 		if (++sc->sc_no_td == sc->sc_ntbuf) {
    568 			ifp->if_flags |= IFF_OACTIVE;
    569 			break;
    570 		}
    571 
    572 	}
    573 
    574 	sc->sc_last_td = bix;
    575 }
    576 
    577 #ifdef LEDEBUG
    578 static void
    579 am79900_recv_print(struct lance_softc *sc, int no)
    580 {
    581 	struct lermd rmd;
    582 	u_int16_t len;
    583 	struct ether_header eh;
    584 
    585 	(*sc->sc_copyfromdesc)(sc, &rmd, LE_RMDADDR(sc, no), sizeof(rmd));
    586 	len = (rmd.rmd2  & 0xfff) - 4;
    587 	printf("%s: receive buffer %d, len = %d\n", sc->sc_dev.dv_xname, no,
    588 	    len);
    589 	printf("%s: status %04x\n", sc->sc_dev.dv_xname,
    590 	    (*sc->sc_rdcsr)(sc, LE_CSR0));
    591 	printf("%s: adr %08x, flags/blen %08x\n",
    592 	    sc->sc_dev.dv_xname, rmd.rmd0, rmd.rmd1);
    593 	if (len >= sizeof(eh)) {
    594 		(*sc->sc_copyfrombuf)(sc, &eh, LE_RBUFADDR(sc, no), sizeof(eh));
    595 		printf("%s: dst %s", sc->sc_dev.dv_xname,
    596 			ether_sprintf(eh.ether_dhost));
    597 		printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
    598 			ntohs(eh.ether_type));
    599 	}
    600 }
    601 
    602 static void
    603 am79900_xmit_print(struct lance_softc *sc, int no)
    604 {
    605 	struct letmd tmd;
    606 	u_int16_t len;
    607 	struct ether_header eh;
    608 
    609 	(*sc->sc_copyfromdesc)(sc, &tmd, LE_TMDADDR(sc, no), sizeof(tmd));
    610 	len = -(tmd.tmd1 & 0xfff);
    611 	printf("%s: transmit buffer %d, len = %d\n", sc->sc_dev.dv_xname, no,
    612 	    len);
    613 	printf("%s: status %04x\n", sc->sc_dev.dv_xname,
    614 	    (*sc->sc_rdcsr)(sc, LE_CSR0));
    615 	printf("%s: adr %08x, flags/blen %08x\n",
    616 	    sc->sc_dev.dv_xname, tmd.tmd0, tmd.tmd1);
    617 	if (len >= sizeof(eh)) {
    618 		(*sc->sc_copyfrombuf)(sc, &eh, LE_TBUFADDR(sc, no), sizeof(eh));
    619 		printf("%s: dst %s", sc->sc_dev.dv_xname,
    620 			ether_sprintf(eh.ether_dhost));
    621 		printf(" src %s type %04x\n", ether_sprintf(eh.ether_shost),
    622 		    ntohs(eh.ether_type));
    623 	}
    624 }
    625 #endif /* LEDEBUG */
    626