Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/dev/snc/dp83932.c
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1 /* $FreeBSD$ */ 2 /* $NecBSD: dp83932.c,v 1.5 1999/07/29 05:08:44 kmatsuda Exp $ */ 3 /* $NetBSD: if_snc.c,v 1.18 1998/04/25 21:27:40 scottr Exp $ */ 4 5 /*- 6 * Copyright (c) 1997, 1998, 1999 7 * Kouichi Matsuda. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Kouichi Matsuda for 20 * NetBSD/pc98. 21 * 4. The name of the author may not be used to endorse or promote products 22 * derived from this software without specific prior written permission 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /* 37 * Modified for FreeBSD(98) 4.0 from NetBSD/pc98 1.4.2 by Motomichi Matsuzaki. 38 */ 39 40 /* 41 * Modified for NetBSD/pc98 1.2G from NetBSD/mac68k 1.2G by Kouichi Matsuda. 42 * Make adapted for NEC PC-9801-83, 84, PC-9801-103, 104, PC-9801N-25 and 43 * PC-9801N-J02, J02R, which uses National Semiconductor DP83934AVQB as 44 * Ethernet Controller and National Semiconductor NS46C46 as 45 * (64 * 16 bits) Microwire Serial EEPROM. 46 */ 47 48 /*- 49 * National Semiconductor DP8393X SONIC Driver 50 * Copyright (c) 1991 Algorithmics Ltd (http://www.algor.co.uk) 51 * You may use, copy, and modify this program so long as you retain the 52 * copyright line. 53 * 54 * This driver has been substantially modified since Algorithmics donated 55 * it. 56 * 57 * Denton Gentry <denny1@home.com> 58 * and also 59 * Yanagisawa Takeshi <yanagisw@aa.ap.titech.ac.jp> 60 * did the work to get this running on the Macintosh. 61 */ 62 63 #include "opt_inet.h" 64 65 #include <sys/param.h> 66 #include <sys/systm.h> 67 #include <sys/sockio.h> 68 #include <sys/mbuf.h> 69 #include <sys/protosw.h> 70 #include <sys/socket.h> 71 #include <sys/syslog.h> 72 #include <sys/errno.h> 73 #if NRND > 0 74 #include <sys/rnd.h> 75 #endif 76 77 #include <net/ethernet.h> 78 #include <net/if.h> 79 #include <net/if_arp.h> 80 #include <net/if_dl.h> 81 #include <net/if_media.h> 82 83 #include <net/bpf.h> 84 85 #include <sys/bus.h> 86 #include <machine/bus.h> 87 #include <dev/snc/dp83932reg.h> 88 #include <dev/snc/dp83932var.h> 89 90 hide void sncwatchdog(struct ifnet *); 91 hide void sncinit(void *); 92 hide int sncstop(struct snc_softc *sc); 93 hide int sncioctl(struct ifnet *ifp, u_long cmd, caddr_t data); 94 hide void sncstart(struct ifnet *ifp); 95 hide void sncreset(struct snc_softc *sc); 96 97 hide void caminitialise(struct snc_softc *); 98 hide void camentry(struct snc_softc *, int, u_char *ea); 99 hide void camprogram(struct snc_softc *); 100 hide void initialise_tda(struct snc_softc *); 101 hide void initialise_rda(struct snc_softc *); 102 hide void initialise_rra(struct snc_softc *); 103 #ifdef SNCDEBUG 104 hide void camdump(struct snc_softc *sc); 105 #endif 106 107 hide void sonictxint(struct snc_softc *); 108 hide void sonicrxint(struct snc_softc *); 109 110 hide u_int sonicput(struct snc_softc *sc, struct mbuf *m0, int mtd_next); 111 hide int sonic_read(struct snc_softc *, u_int32_t, int); 112 hide struct mbuf *sonic_get(struct snc_softc *, u_int32_t, int); 113 114 int snc_enable(struct snc_softc *); 115 void snc_disable(struct snc_softc *); 116 117 int snc_mediachange(struct ifnet *); 118 void snc_mediastatus(struct ifnet *, struct ifmediareq *); 119 120 #ifdef NetBSD 121 #if NetBSD <= 199714 122 struct cfdriver snc_cd = { 123 NULL, "snc", DV_IFNET 124 }; 125 #endif 126 #endif 127 128 #undef assert 129 #undef _assert 130 131 #ifdef NDEBUG 132 #define assert(e) ((void)0) 133 #define _assert(e) ((void)0) 134 #else 135 #define _assert(e) assert(e) 136 #ifdef __STDC__ 137 #define assert(e) ((e) ? (void)0 : __assert("snc ", __FILE__, __LINE__, #e)) 138 #else /* PCC */ 139 #define assert(e) ((e) ? (void)0 : __assert("snc "__FILE__, __LINE__, "e")) 140 #endif 141 #endif 142 143 #ifdef SNCDEBUG 144 #define SNC_SHOWTXHDR 0x01 /* show tx ether_header */ 145 #define SNC_SHOWRXHDR 0x02 /* show rx ether_header */ 146 #define SNC_SHOWCAMENT 0x04 /* show CAM entry */ 147 #endif /* SNCDEBUG */ 148 int sncdebug = 0; 149 150 151 void 152 sncconfig(sc, media, nmedia, defmedia, myea) 153 struct snc_softc *sc; 154 int *media, nmedia, defmedia; 155 u_int8_t *myea; 156 { 157 struct ifnet *ifp = &sc->sc_if; 158 int i; 159 160 #ifdef SNCDEBUG 161 if ((sncdebug & SNC_SHOWCAMENT) != 0) { 162 camdump(sc); 163 } 164 #endif 165 166 #ifdef SNCDEBUG 167 device_printf(sc->sc_dev, 168 "buffers: rra=0x%x cda=0x%x rda=0x%x tda=0x%x\n", 169 sc->v_rra[0], sc->v_cda, 170 sc->v_rda, sc->mtda[0].mtd_vtxp); 171 #endif 172 173 ifp->if_softc = sc; 174 if_initname(ifp, device_get_name(sc->sc_dev), 175 device_get_unit(sc->sc_dev)); 176 ifp->if_ioctl = sncioctl; 177 ifp->if_start = sncstart; 178 ifp->if_flags = 179 IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST | IFF_NEEDSGIANT; 180 ifp->if_watchdog = sncwatchdog; 181 ifp->if_init = sncinit; 182 ifp->if_mtu = ETHERMTU; 183 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 184 bcopy(myea, sc->sc_ethercom.ac_enaddr, ETHER_ADDR_LEN); 185 186 /* Initialize media goo. */ 187 ifmedia_init(&sc->sc_media, 0, snc_mediachange, 188 snc_mediastatus); 189 if (media != NULL) { 190 for (i = 0; i < nmedia; i++) 191 ifmedia_add(&sc->sc_media, media[i], 0, NULL); 192 ifmedia_set(&sc->sc_media, defmedia); 193 } else { 194 ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); 195 ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); 196 } 197 198 ether_ifattach(ifp, myea); 199 200 #if NRND > 0 201 rnd_attach_source(&sc->rnd_source, device_get_nameunit(sc->sc_dev), 202 RND_TYPE_NET, 0); 203 #endif 204 } 205 206 void 207 sncshutdown(arg) 208 void *arg; 209 { 210 211 sncstop((struct snc_softc *)arg); 212 } 213 214 /* 215 * Media change callback. 216 */ 217 int 218 snc_mediachange(ifp) 219 struct ifnet *ifp; 220 { 221 struct snc_softc *sc = ifp->if_softc; 222 223 if (sc->sc_mediachange) 224 return ((*sc->sc_mediachange)(sc)); 225 return (EINVAL); 226 } 227 228 /* 229 * Media status callback. 230 */ 231 void 232 snc_mediastatus(ifp, ifmr) 233 struct ifnet *ifp; 234 struct ifmediareq *ifmr; 235 { 236 struct snc_softc *sc = ifp->if_softc; 237 238 if (sc->sc_enabled == 0) { 239 ifmr->ifm_active = IFM_ETHER | IFM_NONE; 240 ifmr->ifm_status = 0; 241 return; 242 } 243 244 if (sc->sc_mediastatus) 245 (*sc->sc_mediastatus)(sc, ifmr); 246 } 247 248 249 hide int 250 sncioctl(ifp, cmd, data) 251 struct ifnet *ifp; 252 u_long cmd; 253 caddr_t data; 254 { 255 struct ifreq *ifr; 256 struct snc_softc *sc = ifp->if_softc; 257 int s = splhardnet(), err = 0; 258 int temp; 259 260 switch (cmd) { 261 262 case SIOCSIFFLAGS: 263 if ((ifp->if_flags & IFF_UP) == 0 && 264 (ifp->if_flags & IFF_RUNNING) != 0) { 265 /* 266 * If interface is marked down and it is running, 267 * then stop it. 268 */ 269 sncstop(sc); 270 ifp->if_flags &= ~IFF_RUNNING; 271 snc_disable(sc); 272 } else if ((ifp->if_flags & IFF_UP) != 0 && 273 (ifp->if_flags & IFF_RUNNING) == 0) { 274 /* 275 * If interface is marked up and it is stopped, 276 * then start it. 277 */ 278 if ((err = snc_enable(sc)) != 0) 279 break; 280 sncinit(sc); 281 } else if (sc->sc_enabled) { 282 /* 283 * reset the interface to pick up any other changes 284 * in flags 285 */ 286 temp = ifp->if_flags & IFF_UP; 287 sncreset(sc); 288 ifp->if_flags |= temp; 289 sncstart(ifp); 290 } 291 break; 292 293 case SIOCADDMULTI: 294 case SIOCDELMULTI: 295 if (sc->sc_enabled == 0) { 296 err = EIO; 297 break; 298 } 299 temp = ifp->if_flags & IFF_UP; 300 sncreset(sc); 301 ifp->if_flags |= temp; 302 err = 0; 303 break; 304 case SIOCGIFMEDIA: 305 case SIOCSIFMEDIA: 306 ifr = (struct ifreq *) data; 307 err = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 308 break; 309 default: 310 err = ether_ioctl(ifp, cmd, data); 311 break; 312 } 313 splx(s); 314 return (err); 315 } 316 317 /* 318 * Encapsulate a packet of type family for the local net. 319 */ 320 hide void 321 sncstart(ifp) 322 struct ifnet *ifp; 323 { 324 struct snc_softc *sc = ifp->if_softc; 325 struct mbuf *m; 326 int mtd_next; 327 328 if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) 329 return; 330 331 outloop: 332 /* Check for room in the xmit buffer. */ 333 if ((mtd_next = (sc->mtd_free + 1)) == NTDA) 334 mtd_next = 0; 335 336 if (mtd_next == sc->mtd_hw) { 337 ifp->if_flags |= IFF_OACTIVE; 338 return; 339 } 340 341 IF_DEQUEUE(&ifp->if_snd, m); 342 if (m == 0) 343 return; 344 345 /* We need the header for m_pkthdr.len. */ 346 M_ASSERTPKTHDR(m); 347 348 /* 349 * If there is nothing in the o/p queue, and there is room in 350 * the Tx ring, then send the packet directly. Otherwise append 351 * it to the o/p queue. 352 */ 353 if ((sonicput(sc, m, mtd_next)) == 0) { 354 IF_PREPEND(&ifp->if_snd, m); 355 return; 356 } 357 358 /* 359 * If bpf is listening on this interface, let it see the packet 360 * before we commit it to the wire, but only if we are really 361 * committed to send it. 362 * 363 * XXX: Locking must protect m against premature m_freem() in 364 * sonictxint(). 365 */ 366 BPF_MTAP(ifp, m); 367 368 sc->mtd_prev = sc->mtd_free; 369 sc->mtd_free = mtd_next; 370 371 ifp->if_opackets++; /* # of pkts */ 372 373 /* Jump back for possibly more punishment. */ 374 goto outloop; 375 } 376 377 /* 378 * reset and restart the SONIC. Called in case of fatal 379 * hardware/software errors. 380 */ 381 hide void 382 sncreset(sc) 383 struct snc_softc *sc; 384 { 385 sncstop(sc); 386 sncinit(sc); 387 } 388 389 hide void 390 sncinit(xsc) 391 void *xsc; 392 { 393 struct snc_softc *sc = xsc; 394 u_long s_rcr; 395 int s; 396 397 if (sc->sc_if.if_flags & IFF_RUNNING) 398 /* already running */ 399 return; 400 401 s = splhardnet(); 402 403 NIC_PUT(sc, SNCR_CR, CR_RST); /* DCR only accessable in reset mode! */ 404 405 /* config it */ 406 NIC_PUT(sc, SNCR_DCR, (sc->sncr_dcr | 407 (sc->bitmode ? DCR_DW32 : DCR_DW16))); 408 NIC_PUT(sc, SNCR_DCR2, sc->sncr_dcr2); 409 410 s_rcr = RCR_BRD | RCR_LBNONE; 411 if (sc->sc_if.if_flags & IFF_PROMISC) 412 s_rcr |= RCR_PRO; 413 if (sc->sc_if.if_flags & IFF_ALLMULTI) 414 s_rcr |= RCR_AMC; 415 NIC_PUT(sc, SNCR_RCR, s_rcr); 416 417 NIC_PUT(sc, SNCR_IMR, (IMR_PRXEN | IMR_PTXEN | IMR_TXEREN | IMR_LCDEN)); 418 419 /* clear pending interrupts */ 420 NIC_PUT(sc, SNCR_ISR, ISR_ALL); 421 422 /* clear tally counters */ 423 NIC_PUT(sc, SNCR_CRCT, -1); 424 NIC_PUT(sc, SNCR_FAET, -1); 425 NIC_PUT(sc, SNCR_MPT, -1); 426 427 initialise_tda(sc); 428 initialise_rda(sc); 429 initialise_rra(sc); 430 431 /* enable the chip */ 432 NIC_PUT(sc, SNCR_CR, 0); 433 wbflush(); 434 435 /* program the CAM */ 436 camprogram(sc); 437 438 /* get it to read resource descriptors */ 439 NIC_PUT(sc, SNCR_CR, CR_RRRA); 440 wbflush(); 441 while ((NIC_GET(sc, SNCR_CR)) & CR_RRRA) 442 continue; 443 444 /* enable rx */ 445 NIC_PUT(sc, SNCR_CR, CR_RXEN); 446 wbflush(); 447 448 /* flag interface as "running" */ 449 sc->sc_if.if_flags |= IFF_RUNNING; 450 sc->sc_if.if_flags &= ~IFF_OACTIVE; 451 452 splx(s); 453 return; 454 } 455 456 /* 457 * close down an interface and free its buffers 458 * Called on final close of device, or if sncinit() fails 459 * part way through. 460 */ 461 hide int 462 sncstop(sc) 463 struct snc_softc *sc; 464 { 465 struct mtd *mtd; 466 int s = splhardnet(); 467 468 /* stick chip in reset */ 469 NIC_PUT(sc, SNCR_CR, CR_RST); 470 wbflush(); 471 472 /* free all receive buffers (currently static so nothing to do) */ 473 474 /* free all pending transmit mbufs */ 475 while (sc->mtd_hw != sc->mtd_free) { 476 mtd = &sc->mtda[sc->mtd_hw]; 477 if (mtd->mtd_mbuf) 478 m_freem(mtd->mtd_mbuf); 479 if (++sc->mtd_hw == NTDA) sc->mtd_hw = 0; 480 } 481 482 sc->sc_if.if_timer = 0; 483 sc->sc_if.if_flags &= ~(IFF_RUNNING | IFF_UP); 484 485 splx(s); 486 return (0); 487 } 488 489 /* 490 * Called if any Tx packets remain unsent after 5 seconds, 491 * In all cases we just reset the chip, and any retransmission 492 * will be handled by higher level protocol timeouts. 493 */ 494 hide void 495 sncwatchdog(ifp) 496 struct ifnet *ifp; 497 { 498 struct snc_softc *sc = ifp->if_softc; 499 struct mtd *mtd; 500 int temp; 501 502 if (sc->mtd_hw != sc->mtd_free) { 503 /* something still pending for transmit */ 504 mtd = &sc->mtda[sc->mtd_hw]; 505 if (SRO(sc, mtd->mtd_vtxp, TXP_STATUS) == 0) 506 log(LOG_ERR, "%s: Tx - timeout\n", 507 device_get_nameunit(sc->sc_dev)); 508 else 509 log(LOG_ERR, "%s: Tx - lost interrupt\n", 510 device_get_nameunit(sc->sc_dev)); 511 temp = ifp->if_flags & IFF_UP; 512 sncreset(sc); 513 ifp->if_flags |= temp; 514 } 515 } 516 517 /* 518 * stuff packet into sonic (at splnet) 519 */ 520 hide u_int 521 sonicput(sc, m0, mtd_next) 522 struct snc_softc *sc; 523 struct mbuf *m0; 524 int mtd_next; 525 { 526 struct mtd *mtdp; 527 struct mbuf *m; 528 u_int32_t buff; 529 u_int32_t txp; 530 u_int len = 0; 531 u_int totlen = 0; 532 533 #ifdef whyonearthwouldyoudothis 534 if (NIC_GET(sc, SNCR_CR) & CR_TXP) 535 return (0); 536 #endif 537 538 /* grab the replacement mtd */ 539 mtdp = &sc->mtda[sc->mtd_free]; 540 541 buff = mtdp->mtd_vbuf; 542 543 /* this packet goes to mtdnext fill in the TDA */ 544 mtdp->mtd_mbuf = m0; 545 txp = mtdp->mtd_vtxp; 546 547 /* Write to the config word. Every (NTDA/2)+1 packets we set an intr */ 548 if (sc->mtd_pint == 0) { 549 sc->mtd_pint = NTDA/2; 550 SWO(sc, txp, TXP_CONFIG, TCR_PINT); 551 } else { 552 sc->mtd_pint--; 553 SWO(sc, txp, TXP_CONFIG, 0); 554 } 555 556 for (m = m0; m; m = m->m_next) { 557 len = m->m_len; 558 totlen += len; 559 (*sc->sc_copytobuf)(sc, mtod(m, caddr_t), buff, len); 560 buff += len; 561 } 562 if (totlen >= TXBSIZE) { 563 panic("%s: sonicput: packet overflow", 564 device_get_nameunit(sc->sc_dev)); 565 } 566 567 SWO(sc, txp, TXP_FRAGOFF + (0 * TXP_FRAGSIZE) + TXP_FPTRLO, 568 LOWER(mtdp->mtd_vbuf)); 569 SWO(sc, txp, TXP_FRAGOFF + (0 * TXP_FRAGSIZE) + TXP_FPTRHI, 570 UPPER(mtdp->mtd_vbuf)); 571 572 if (totlen < ETHERMIN + sizeof(struct ether_header)) { 573 int pad = ETHERMIN + sizeof(struct ether_header) - totlen; 574 (*sc->sc_zerobuf)(sc, mtdp->mtd_vbuf + totlen, pad); 575 totlen = ETHERMIN + sizeof(struct ether_header); 576 } 577 578 SWO(sc, txp, TXP_FRAGOFF + (0 * TXP_FRAGSIZE) + TXP_FSIZE, 579 totlen); 580 SWO(sc, txp, TXP_FRAGCNT, 1); 581 SWO(sc, txp, TXP_PKTSIZE, totlen); 582 583 /* link onto the next mtd that will be used */ 584 SWO(sc, txp, TXP_FRAGOFF + (1 * TXP_FRAGSIZE) + TXP_FPTRLO, 585 LOWER(sc->mtda[mtd_next].mtd_vtxp) | EOL); 586 587 /* 588 * The previous txp.tlink currently contains a pointer to 589 * our txp | EOL. Want to clear the EOL, so write our 590 * pointer to the previous txp. 591 */ 592 SWO(sc, sc->mtda[sc->mtd_prev].mtd_vtxp, sc->mtd_tlinko, 593 LOWER(mtdp->mtd_vtxp)); 594 595 /* make sure chip is running */ 596 wbflush(); 597 NIC_PUT(sc, SNCR_CR, CR_TXP); 598 wbflush(); 599 sc->sc_if.if_timer = 5; /* 5 seconds to watch for failing to transmit */ 600 601 return (totlen); 602 } 603 604 /* 605 * These are called from sonicioctl() when /etc/ifconfig is run to set 606 * the address or switch the i/f on. 607 */ 608 /* 609 * CAM support 610 */ 611 hide void 612 caminitialise(sc) 613 struct snc_softc *sc; 614 { 615 u_int32_t v_cda = sc->v_cda; 616 int i; 617 int camoffset; 618 619 for (i = 0; i < MAXCAM; i++) { 620 camoffset = i * CDA_CAMDESC; 621 SWO(sc, v_cda, (camoffset + CDA_CAMEP), i); 622 SWO(sc, v_cda, (camoffset + CDA_CAMAP2), 0); 623 SWO(sc, v_cda, (camoffset + CDA_CAMAP1), 0); 624 SWO(sc, v_cda, (camoffset + CDA_CAMAP0), 0); 625 } 626 SWO(sc, v_cda, CDA_ENABLE, 0); 627 628 #ifdef SNCDEBUG 629 if ((sncdebug & SNC_SHOWCAMENT) != 0) { 630 camdump(sc); 631 } 632 #endif 633 } 634 635 hide void 636 camentry(sc, entry, ea) 637 int entry; 638 u_char *ea; 639 struct snc_softc *sc; 640 { 641 u_int32_t v_cda = sc->v_cda; 642 int camoffset = entry * CDA_CAMDESC; 643 644 SWO(sc, v_cda, camoffset + CDA_CAMEP, entry); 645 SWO(sc, v_cda, camoffset + CDA_CAMAP2, (ea[5] << 8) | ea[4]); 646 SWO(sc, v_cda, camoffset + CDA_CAMAP1, (ea[3] << 8) | ea[2]); 647 SWO(sc, v_cda, camoffset + CDA_CAMAP0, (ea[1] << 8) | ea[0]); 648 SWO(sc, v_cda, CDA_ENABLE, 649 (SRO(sc, v_cda, CDA_ENABLE) | (1 << entry))); 650 } 651 652 hide void 653 camprogram(sc) 654 struct snc_softc *sc; 655 { 656 struct ifmultiaddr *ifma; 657 struct ifnet *ifp; 658 int timeout; 659 int mcount = 0; 660 661 caminitialise(sc); 662 663 ifp = &sc->sc_if; 664 665 /* Always load our own address first. */ 666 camentry (sc, mcount, sc->sc_ethercom.ac_enaddr); 667 mcount++; 668 669 /* Assume we won't need allmulti bit. */ 670 ifp->if_flags &= ~IFF_ALLMULTI; 671 672 /* Loop through multicast addresses */ 673 IF_ADDR_LOCK(ifp); 674 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 675 if (ifma->ifma_addr->sa_family != AF_LINK) 676 continue; 677 if (mcount == MAXCAM) { 678 ifp->if_flags |= IFF_ALLMULTI; 679 break; 680 } 681 682 /* program the CAM with the specified entry */ 683 camentry(sc, mcount, 684 LLADDR((struct sockaddr_dl *)ifma->ifma_addr)); 685 mcount++; 686 } 687 IF_ADDR_UNLOCK(ifp); 688 689 NIC_PUT(sc, SNCR_CDP, LOWER(sc->v_cda)); 690 NIC_PUT(sc, SNCR_CDC, MAXCAM); 691 NIC_PUT(sc, SNCR_CR, CR_LCAM); 692 wbflush(); 693 694 timeout = 10000; 695 while ((NIC_GET(sc, SNCR_CR) & CR_LCAM) && timeout--) 696 continue; 697 if (timeout == 0) { 698 /* XXX */ 699 panic("%s: CAM initialisation failed\n", 700 device_get_nameunit(sc->sc_dev)); 701 } 702 timeout = 10000; 703 while (((NIC_GET(sc, SNCR_ISR) & ISR_LCD) == 0) && timeout--) 704 continue; 705 706 if (NIC_GET(sc, SNCR_ISR) & ISR_LCD) 707 NIC_PUT(sc, SNCR_ISR, ISR_LCD); 708 else 709 device_printf(sc->sc_dev, 710 "CAM initialisation without interrupt\n"); 711 } 712 713 #ifdef SNCDEBUG 714 hide void 715 camdump(sc) 716 struct snc_softc *sc; 717 { 718 int i; 719 720 printf("CAM entries:\n"); 721 NIC_PUT(sc, SNCR_CR, CR_RST); 722 wbflush(); 723 724 for (i = 0; i < 16; i++) { 725 u_short ap2, ap1, ap0; 726 NIC_PUT(sc, SNCR_CEP, i); 727 wbflush(); 728 ap2 = NIC_GET(sc, SNCR_CAP2); 729 ap1 = NIC_GET(sc, SNCR_CAP1); 730 ap0 = NIC_GET(sc, SNCR_CAP0); 731 printf("%d: ap2=0x%x ap1=0x%x ap0=0x%x\n", i, ap2, ap1, ap0); 732 } 733 printf("CAM enable 0x%x\n", NIC_GET(sc, SNCR_CEP)); 734 735 NIC_PUT(sc, SNCR_CR, 0); 736 wbflush(); 737 } 738 #endif 739 740 hide void 741 initialise_tda(sc) 742 struct snc_softc *sc; 743 { 744 struct mtd *mtd; 745 int i; 746 747 for (i = 0; i < NTDA; i++) { 748 mtd = &sc->mtda[i]; 749 mtd->mtd_mbuf = 0; 750 } 751 752 sc->mtd_hw = 0; 753 sc->mtd_prev = NTDA - 1; 754 sc->mtd_free = 0; 755 sc->mtd_tlinko = TXP_FRAGOFF + 1*TXP_FRAGSIZE + TXP_FPTRLO; 756 sc->mtd_pint = NTDA/2; 757 758 NIC_PUT(sc, SNCR_UTDA, UPPER(sc->mtda[0].mtd_vtxp)); 759 NIC_PUT(sc, SNCR_CTDA, LOWER(sc->mtda[0].mtd_vtxp)); 760 } 761 762 hide void 763 initialise_rda(sc) 764 struct snc_softc *sc; 765 { 766 int i; 767 u_int32_t vv_rda = 0; 768 u_int32_t v_rda = 0; 769 770 /* link the RDA's together into a circular list */ 771 for (i = 0; i < (sc->sc_nrda - 1); i++) { 772 v_rda = sc->v_rda + (i * RXPKT_SIZE(sc)); 773 vv_rda = sc->v_rda + ((i+1) * RXPKT_SIZE(sc)); 774 SWO(sc, v_rda, RXPKT_RLINK, LOWER(vv_rda)); 775 SWO(sc, v_rda, RXPKT_INUSE, 1); 776 } 777 v_rda = sc->v_rda + ((sc->sc_nrda - 1) * RXPKT_SIZE(sc)); 778 SWO(sc, v_rda, RXPKT_RLINK, LOWER(sc->v_rda) | EOL); 779 SWO(sc, v_rda, RXPKT_INUSE, 1); 780 781 /* mark end of receive descriptor list */ 782 sc->sc_rdamark = sc->sc_nrda - 1; 783 784 sc->sc_rxmark = 0; 785 786 NIC_PUT(sc, SNCR_URDA, UPPER(sc->v_rda)); 787 NIC_PUT(sc, SNCR_CRDA, LOWER(sc->v_rda)); 788 wbflush(); 789 } 790 791 hide void 792 initialise_rra(sc) 793 struct snc_softc *sc; 794 { 795 int i; 796 u_int v; 797 int bitmode = sc->bitmode; 798 799 if (bitmode) 800 NIC_PUT(sc, SNCR_EOBC, RBASIZE(sc) / 2 - 2); 801 else 802 NIC_PUT(sc, SNCR_EOBC, RBASIZE(sc) / 2 - 1); 803 804 NIC_PUT(sc, SNCR_URRA, UPPER(sc->v_rra[0])); 805 NIC_PUT(sc, SNCR_RSA, LOWER(sc->v_rra[0])); 806 /* rea must point just past the end of the rra space */ 807 NIC_PUT(sc, SNCR_REA, LOWER(sc->v_rea)); 808 NIC_PUT(sc, SNCR_RRP, LOWER(sc->v_rra[0])); 809 NIC_PUT(sc, SNCR_RSC, 0); 810 811 /* fill up SOME of the rra with buffers */ 812 for (i = 0; i < NRBA; i++) { 813 v = SONIC_GETDMA(sc->rbuf[i]); 814 SWO(sc, sc->v_rra[i], RXRSRC_PTRHI, UPPER(v)); 815 SWO(sc, sc->v_rra[i], RXRSRC_PTRLO, LOWER(v)); 816 SWO(sc, sc->v_rra[i], RXRSRC_WCHI, UPPER(NBPG/2)); 817 SWO(sc, sc->v_rra[i], RXRSRC_WCLO, LOWER(NBPG/2)); 818 } 819 sc->sc_rramark = NRBA; 820 NIC_PUT(sc, SNCR_RWP, LOWER(sc->v_rra[sc->sc_rramark])); 821 wbflush(); 822 } 823 824 void 825 sncintr(arg) 826 void *arg; 827 { 828 struct snc_softc *sc = (struct snc_softc *)arg; 829 int isr; 830 831 if (sc->sc_enabled == 0) 832 return; 833 834 while ((isr = (NIC_GET(sc, SNCR_ISR) & ISR_ALL)) != 0) { 835 /* scrub the interrupts that we are going to service */ 836 NIC_PUT(sc, SNCR_ISR, isr); 837 wbflush(); 838 839 if (isr & (ISR_BR | ISR_LCD | ISR_TC)) 840 device_printf(sc->sc_dev, 841 "unexpected interrupt status 0x%x\n", 842 isr); 843 844 if (isr & (ISR_TXDN | ISR_TXER | ISR_PINT)) 845 sonictxint(sc); 846 847 if (isr & ISR_PKTRX) 848 sonicrxint(sc); 849 850 if (isr & (ISR_HBL | ISR_RDE | ISR_RBE | ISR_RBAE | ISR_RFO)) { 851 if (isr & ISR_HBL) 852 /* 853 * The repeater is not providing a heartbeat. 854 * In itself this isn't harmful, lots of the 855 * cheap repeater hubs don't supply a heartbeat. 856 * So ignore the lack of heartbeat. Its only 857 * if we can't detect a carrier that we have a 858 * problem. 859 */ 860 ; 861 if (isr & ISR_RDE) 862 device_printf(sc->sc_dev, 863 "receive descriptors exhausted\n"); 864 if (isr & ISR_RBE) 865 device_printf(sc->sc_dev, 866 "receive buffers exhausted\n"); 867 if (isr & ISR_RBAE) 868 device_printf(sc->sc_dev, 869 "receive buffer area exhausted\n"); 870 if (isr & ISR_RFO) 871 device_printf(sc->sc_dev, 872 "receive FIFO overrun\n"); 873 } 874 if (isr & (ISR_CRC | ISR_FAE | ISR_MP)) { 875 #ifdef notdef 876 if (isr & ISR_CRC) 877 sc->sc_crctally++; 878 if (isr & ISR_FAE) 879 sc->sc_faetally++; 880 if (isr & ISR_MP) 881 sc->sc_mptally++; 882 #endif 883 } 884 sncstart(&sc->sc_if); 885 886 #if NRND > 0 887 if (isr) 888 rnd_add_uint32(&sc->rnd_source, isr); 889 #endif 890 } 891 return; 892 } 893 894 /* 895 * Transmit interrupt routine 896 */ 897 hide void 898 sonictxint(sc) 899 struct snc_softc *sc; 900 { 901 struct mtd *mtd; 902 u_int32_t txp; 903 unsigned short txp_status; 904 int mtd_hw; 905 struct ifnet *ifp = &sc->sc_if; 906 907 mtd_hw = sc->mtd_hw; 908 909 if (mtd_hw == sc->mtd_free) 910 return; 911 912 while (mtd_hw != sc->mtd_free) { 913 mtd = &sc->mtda[mtd_hw]; 914 915 txp = mtd->mtd_vtxp; 916 917 if (SRO(sc, txp, TXP_STATUS) == 0) { 918 break; /* it hasn't really gone yet */ 919 } 920 921 #ifdef SNCDEBUG 922 if ((sncdebug & SNC_SHOWTXHDR) != 0) 923 { 924 struct ether_header eh; 925 926 (*sc->sc_copyfrombuf)(sc, &eh, mtd->mtd_vbuf, sizeof(eh)); 927 device_printf(sc->sc_dev, 928 "xmit status=0x%x len=%d type=0x%x from %6D", 929 SRO(sc, txp, TXP_STATUS), 930 SRO(sc, txp, TXP_PKTSIZE), 931 htons(eh.ether_type), 932 eh.ether_shost, ":"); 933 printf(" (to %6D)\n", eh.ether_dhost, ":"); 934 } 935 #endif /* SNCDEBUG */ 936 937 ifp->if_flags &= ~IFF_OACTIVE; 938 939 if (mtd->mtd_mbuf != 0) { 940 m_freem(mtd->mtd_mbuf); 941 mtd->mtd_mbuf = 0; 942 } 943 if (++mtd_hw == NTDA) mtd_hw = 0; 944 945 txp_status = SRO(sc, txp, TXP_STATUS); 946 947 ifp->if_collisions += (txp_status & TCR_EXC) ? 16 : 948 ((txp_status & TCR_NC) >> 12); 949 950 if ((txp_status & TCR_PTX) == 0) { 951 ifp->if_oerrors++; 952 device_printf(sc->sc_dev, "Tx packet status=0x%x\n", 953 txp_status); 954 955 /* XXX - DG This looks bogus */ 956 if (mtd_hw != sc->mtd_free) { 957 printf("resubmitting remaining packets\n"); 958 mtd = &sc->mtda[mtd_hw]; 959 NIC_PUT(sc, SNCR_CTDA, LOWER(mtd->mtd_vtxp)); 960 NIC_PUT(sc, SNCR_CR, CR_TXP); 961 wbflush(); 962 break; 963 } 964 } 965 } 966 967 sc->mtd_hw = mtd_hw; 968 return; 969 } 970 971 /* 972 * Receive interrupt routine 973 */ 974 hide void 975 sonicrxint(sc) 976 struct snc_softc *sc; 977 { 978 u_int32_t rda; 979 int orra; 980 int len; 981 int rramark; 982 int rdamark; 983 u_int16_t rxpkt_ptr; 984 985 rda = sc->v_rda + (sc->sc_rxmark * RXPKT_SIZE(sc)); 986 987 while (SRO(sc, rda, RXPKT_INUSE) == 0) { 988 u_int status = SRO(sc, rda, RXPKT_STATUS); 989 990 orra = RBASEQ(SRO(sc, rda, RXPKT_SEQNO)) & RRAMASK; 991 rxpkt_ptr = SRO(sc, rda, RXPKT_PTRLO); 992 /* 993 * Do not trunc ether_header length. 994 * Our sonic_read() and sonic_get() require it. 995 */ 996 len = SRO(sc, rda, RXPKT_BYTEC) - FCSSIZE; 997 if (status & RCR_PRX) { 998 /* XXX: Does PGOFSET require? */ 999 u_int32_t pkt = 1000 sc->rbuf[orra & RBAMASK] + (rxpkt_ptr & PGOFSET); 1001 if (sonic_read(sc, pkt, len)) 1002 sc->sc_if.if_ipackets++; 1003 else 1004 sc->sc_if.if_ierrors++; 1005 } else 1006 sc->sc_if.if_ierrors++; 1007 1008 /* 1009 * give receive buffer area back to chip. 1010 * 1011 * If this was the last packet in the RRA, give the RRA to 1012 * the chip again. 1013 * If sonic read didnt copy it out then we would have to 1014 * wait !! 1015 * (dont bother add it back in again straight away) 1016 * 1017 * Really, we're doing v_rra[rramark] = v_rra[orra] but 1018 * we have to use the macros because SONIC might be in 1019 * 16 or 32 bit mode. 1020 */ 1021 if (status & RCR_LPKT) { 1022 u_int32_t tmp1, tmp2; 1023 1024 rramark = sc->sc_rramark; 1025 tmp1 = sc->v_rra[rramark]; 1026 tmp2 = sc->v_rra[orra]; 1027 SWO(sc, tmp1, RXRSRC_PTRLO, 1028 SRO(sc, tmp2, RXRSRC_PTRLO)); 1029 SWO(sc, tmp1, RXRSRC_PTRHI, 1030 SRO(sc, tmp2, RXRSRC_PTRHI)); 1031 SWO(sc, tmp1, RXRSRC_WCLO, 1032 SRO(sc, tmp2, RXRSRC_WCLO)); 1033 SWO(sc, tmp1, RXRSRC_WCHI, 1034 SRO(sc, tmp2, RXRSRC_WCHI)); 1035 1036 /* zap old rra for fun */ 1037 SWO(sc, tmp2, RXRSRC_WCHI, 0); 1038 SWO(sc, tmp2, RXRSRC_WCLO, 0); 1039 1040 sc->sc_rramark = (++rramark) & RRAMASK; 1041 NIC_PUT(sc, SNCR_RWP, LOWER(sc->v_rra[rramark])); 1042 wbflush(); 1043 } 1044 1045 /* 1046 * give receive descriptor back to chip simple 1047 * list is circular 1048 */ 1049 rdamark = sc->sc_rdamark; 1050 SWO(sc, rda, RXPKT_INUSE, 1); 1051 SWO(sc, rda, RXPKT_RLINK, 1052 SRO(sc, rda, RXPKT_RLINK) | EOL); 1053 SWO(sc, (sc->v_rda + (rdamark * RXPKT_SIZE(sc))), RXPKT_RLINK, 1054 SRO(sc, (sc->v_rda + (rdamark * RXPKT_SIZE(sc))), 1055 RXPKT_RLINK) & ~EOL); 1056 sc->sc_rdamark = sc->sc_rxmark; 1057 1058 if (++sc->sc_rxmark >= sc->sc_nrda) 1059 sc->sc_rxmark = 0; 1060 rda = sc->v_rda + (sc->sc_rxmark * RXPKT_SIZE(sc)); 1061 } 1062 } 1063 1064 /* 1065 * sonic_read -- pull packet off interface and forward to 1066 * appropriate protocol handler 1067 */ 1068 hide int 1069 sonic_read(sc, pkt, len) 1070 struct snc_softc *sc; 1071 u_int32_t pkt; 1072 int len; 1073 { 1074 struct ifnet *ifp = &sc->sc_if; 1075 struct ether_header *et; 1076 struct mbuf *m; 1077 1078 if (len <= sizeof(struct ether_header) || 1079 len > ETHERMTU + sizeof(struct ether_header)) { 1080 device_printf(sc->sc_dev, 1081 "invalid packet length %d bytes\n", len); 1082 return (0); 1083 } 1084 1085 /* Pull packet off interface. */ 1086 m = sonic_get(sc, pkt, len); 1087 if (m == 0) { 1088 return (0); 1089 } 1090 1091 /* We assume that the header fit entirely in one mbuf. */ 1092 et = mtod(m, struct ether_header *); 1093 1094 #ifdef SNCDEBUG 1095 if ((sncdebug & SNC_SHOWRXHDR) != 0) 1096 { 1097 device_printf(sc->sc_dev, "rcvd 0x%x len=%d type=0x%x from %6D", 1098 pkt, len, htons(et->ether_type), 1099 et->ether_shost, ":"); 1100 printf(" (to %6D)\n", et->ether_dhost, ":"); 1101 } 1102 #endif /* SNCDEBUG */ 1103 1104 /* Pass the packet up. */ 1105 (*ifp->if_input)(ifp, m); 1106 return (1); 1107 } 1108 1109 1110 /* 1111 * munge the received packet into an mbuf chain 1112 */ 1113 hide struct mbuf * 1114 sonic_get(sc, pkt, datalen) 1115 struct snc_softc *sc; 1116 u_int32_t pkt; 1117 int datalen; 1118 { 1119 struct mbuf *m, *top, **mp; 1120 int len; 1121 /* 1122 * Do not trunc ether_header length. 1123 * Our sonic_read() and sonic_get() require it. 1124 */ 1125 1126 MGETHDR(m, M_DONTWAIT, MT_DATA); 1127 if (m == 0) 1128 return (0); 1129 m->m_pkthdr.rcvif = &sc->sc_if; 1130 m->m_pkthdr.len = datalen; 1131 len = MHLEN; 1132 top = 0; 1133 mp = ⊤ 1134 1135 while (datalen > 0) { 1136 if (top) { 1137 MGET(m, M_DONTWAIT, MT_DATA); 1138 if (m == 0) { 1139 m_freem(top); 1140 return (0); 1141 } 1142 len = MLEN; 1143 } 1144 if (datalen >= MINCLSIZE) { 1145 MCLGET(m, M_DONTWAIT); 1146 if ((m->m_flags & M_EXT) == 0) { 1147 if (top) m_freem(top); 1148 return (0); 1149 } 1150 len = MCLBYTES; 1151 } 1152 #if 0 1153 /* XXX: Require? */ 1154 if (!top) { 1155 register int pad = 1156 ALIGN(sizeof(struct ether_header)) - 1157 sizeof(struct ether_header); 1158 m->m_data += pad; 1159 len -= pad; 1160 } 1161 #endif 1162 m->m_len = len = min(datalen, len); 1163 1164 (*sc->sc_copyfrombuf)(sc, mtod(m, caddr_t), pkt, len); 1165 pkt += len; 1166 datalen -= len; 1167 *mp = m; 1168 mp = &m->m_next; 1169 } 1170 1171 return (top); 1172 } 1173 /* 1174 * Enable power on the interface. 1175 */ 1176 int 1177 snc_enable(sc) 1178 struct snc_softc *sc; 1179 { 1180 1181 #ifdef SNCDEBUG 1182 device_printf(sc->sc_dev, "snc_enable()\n"); 1183 #endif /* SNCDEBUG */ 1184 1185 if (sc->sc_enabled == 0 && sc->sc_enable != NULL) { 1186 if ((*sc->sc_enable)(sc) != 0) { 1187 device_printf(sc->sc_dev, "device enable failed\n"); 1188 return (EIO); 1189 } 1190 } 1191 1192 sc->sc_enabled = 1; 1193 return (0); 1194 } 1195 1196 /* 1197 * Disable power on the interface. 1198 */ 1199 void 1200 snc_disable(sc) 1201 struct snc_softc *sc; 1202 { 1203 1204 #ifdef SNCDEBUG 1205 device_printf(sc->sc_dev, "snc_disable()\n"); 1206 #endif /* SNCDEBUG */ 1207 1208 if (sc->sc_enabled != 0 && sc->sc_disable != NULL) { 1209 (*sc->sc_disable)(sc); 1210 sc->sc_enabled = 0; 1211 } 1212 } 1213 1214
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