lance.c revision 1.9.2.1
1 /* $NetBSD: lance.c,v 1.9.2.1 2000/11/20 11:40:41 bouyer Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum and by Jason R. Thorpe of the Numerical Aerospace 9 * Simulation Facility, NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /*- 41 * Copyright (c) 1992, 1993 42 * The Regents of the University of California. All rights reserved. 43 * 44 * This code is derived from software contributed to Berkeley by 45 * Ralph Campbell and Rick Macklem. 46 * 47 * Redistribution and use in source and binary forms, with or without 48 * modification, are permitted provided that the following conditions 49 * are met: 50 * 1. Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * 2. Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in the 54 * documentation and/or other materials provided with the distribution. 55 * 3. All advertising materials mentioning features or use of this software 56 * must display the following acknowledgement: 57 * This product includes software developed by the University of 58 * California, Berkeley and its contributors. 59 * 4. Neither the name of the University nor the names of its contributors 60 * may be used to endorse or promote products derived from this software 61 * without specific prior written permission. 62 * 63 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 64 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 65 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 66 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 67 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 68 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 69 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 70 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 71 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 72 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 73 * SUCH DAMAGE. 74 * 75 * @(#)if_le.c 8.2 (Berkeley) 11/16/93 76 */ 77 78 #include "opt_inet.h" 79 #include "opt_ccitt.h" 80 #include "opt_llc.h" 81 #include "opt_ns.h" 82 #include "bpfilter.h" 83 #include "rnd.h" 84 85 #include <sys/param.h> 86 #include <sys/systm.h> 87 #include <sys/mbuf.h> 88 #include <sys/syslog.h> 89 #include <sys/socket.h> 90 #include <sys/device.h> 91 #include <sys/malloc.h> 92 #include <sys/ioctl.h> 93 #include <sys/errno.h> 94 #if NRND > 0 95 #include <sys/rnd.h> 96 #endif 97 98 #include <net/if.h> 99 #include <net/if_dl.h> 100 #include <net/if_ether.h> 101 #include <net/if_media.h> 102 103 #ifdef INET 104 #include <netinet/in.h> 105 #include <netinet/if_inarp.h> 106 #include <netinet/in_systm.h> 107 #include <netinet/in_var.h> 108 #include <netinet/ip.h> 109 #endif 110 111 #ifdef NS 112 #include <netns/ns.h> 113 #include <netns/ns_if.h> 114 #endif 115 116 #if defined(CCITT) && defined(LLC) 117 #include <sys/socketvar.h> 118 #include <netccitt/x25.h> 119 #include <netccitt/pk.h> 120 #include <netccitt/pk_var.h> 121 #include <netccitt/pk_extern.h> 122 #endif 123 124 #if NBPFILTER > 0 125 #include <net/bpf.h> 126 #include <net/bpfdesc.h> 127 #endif 128 129 #include <dev/ic/lancereg.h> 130 #include <dev/ic/lancevar.h> 131 132 #if defined(_KERNEL) && !defined(_LKM) 133 #include "opt_ddb.h" 134 #endif 135 136 #ifdef DDB 137 #define integrate 138 #define hide 139 #else 140 #define integrate static __inline 141 #define hide static 142 #endif 143 144 integrate struct mbuf *lance_get __P((struct lance_softc *, int, int)); 145 146 hide void lance_shutdown __P((void *)); 147 148 int lance_mediachange __P((struct ifnet *)); 149 void lance_mediastatus __P((struct ifnet *, struct ifmediareq *)); 150 151 static inline u_int16_t ether_cmp __P((void *, void *)); 152 153 void lance_stop __P((struct lance_softc *)); 154 int lance_ioctl __P((struct ifnet *, u_long, caddr_t)); 155 void lance_watchdog __P((struct ifnet *)); 156 157 /* 158 * Compare two Ether/802 addresses for equality, inlined and 159 * unrolled for speed. Use this like bcmp(). 160 * 161 * XXX: Add <machine/inlines.h> for stuff like this? 162 * XXX: or maybe add it to libkern.h instead? 163 * 164 * "I'd love to have an inline assembler version of this." 165 * XXX: Who wanted that? mycroft? I wrote one, but this 166 * version in C is as good as hand-coded assembly. -gwr 167 * 168 * Please do NOT tweak this without looking at the actual 169 * assembly code generated before and after your tweaks! 170 */ 171 static inline u_int16_t 172 ether_cmp(one, two) 173 void *one, *two; 174 { 175 u_int16_t *a = (u_short *) one; 176 u_int16_t *b = (u_short *) two; 177 u_int16_t diff; 178 179 #ifdef m68k 180 /* 181 * The post-increment-pointer form produces the best 182 * machine code for m68k. This was carefully tuned 183 * so it compiles to just 8 short (2-byte) op-codes! 184 */ 185 diff = *a++ - *b++; 186 diff |= *a++ - *b++; 187 diff |= *a++ - *b++; 188 #else 189 /* 190 * Most modern CPUs do better with a single expresion. 191 * Note that short-cut evaluation is NOT helpful here, 192 * because it just makes the code longer, not faster! 193 */ 194 diff = (a[0] - b[0]) | (a[1] - b[1]) | (a[2] - b[2]); 195 #endif 196 197 return (diff); 198 } 199 200 #define ETHER_CMP ether_cmp 201 202 #ifdef LANCE_REVC_BUG 203 /* Make sure this is short-aligned, for ether_cmp(). */ 204 static u_int16_t bcast_enaddr[3] = { ~0, ~0, ~0 }; 205 #endif 206 207 #define ifp (&sc->sc_ethercom.ec_if) 208 209 void 210 lance_config(sc) 211 struct lance_softc *sc; 212 { 213 int i; 214 215 /* Make sure the chip is stopped. */ 216 lance_stop(sc); 217 218 /* Initialize ifnet structure. */ 219 bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ); 220 ifp->if_softc = sc; 221 ifp->if_start = sc->sc_start; 222 ifp->if_ioctl = lance_ioctl; 223 ifp->if_watchdog = lance_watchdog; 224 ifp->if_flags = 225 IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; 226 #ifdef LANCE_REVC_BUG 227 ifp->if_flags &= ~IFF_MULTICAST; 228 #endif 229 230 /* Initialize ifmedia structures. */ 231 ifmedia_init(&sc->sc_media, 0, lance_mediachange, lance_mediastatus); 232 if (sc->sc_supmedia != NULL) { 233 for (i = 0; i < sc->sc_nsupmedia; i++) 234 ifmedia_add(&sc->sc_media, sc->sc_supmedia[i], 235 0, NULL); 236 ifmedia_set(&sc->sc_media, sc->sc_defaultmedia); 237 } else { 238 ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); 239 ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); 240 } 241 242 switch (sc->sc_memsize) { 243 case 8192: 244 sc->sc_nrbuf = 4; 245 sc->sc_ntbuf = 1; 246 break; 247 case 16384: 248 sc->sc_nrbuf = 8; 249 sc->sc_ntbuf = 2; 250 break; 251 case 32768: 252 sc->sc_nrbuf = 16; 253 sc->sc_ntbuf = 4; 254 break; 255 case 65536: 256 sc->sc_nrbuf = 32; 257 sc->sc_ntbuf = 8; 258 break; 259 case 131072: 260 sc->sc_nrbuf = 64; 261 sc->sc_ntbuf = 16; 262 break; 263 case 262144: 264 sc->sc_nrbuf = 128; 265 sc->sc_ntbuf = 32; 266 break; 267 default: 268 panic("lance_config: weird memory size"); 269 } 270 271 printf(": address %s\n", ether_sprintf(sc->sc_enaddr)); 272 printf("%s: %d receive buffers, %d transmit buffers\n", 273 sc->sc_dev.dv_xname, sc->sc_nrbuf, sc->sc_ntbuf); 274 275 /* claim 802.1q capability */ 276 sc->sc_ethercom.ec_capabilities |= ETHERCAP_VLAN_MTU; 277 /* Attach the interface. */ 278 if_attach(ifp); 279 ether_ifattach(ifp, sc->sc_enaddr); 280 281 #if NBPFILTER > 0 282 bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header)); 283 #endif 284 285 sc->sc_sh = shutdownhook_establish(lance_shutdown, sc); 286 if (sc->sc_sh == NULL) 287 panic("lance_config: can't establish shutdownhook"); 288 sc->sc_rbufaddr = malloc(sc->sc_nrbuf * sizeof(int), M_DEVBUF, 289 M_WAITOK); 290 sc->sc_tbufaddr = malloc(sc->sc_ntbuf * sizeof(int), M_DEVBUF, 291 M_WAITOK); 292 293 #if NRND > 0 294 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 295 RND_TYPE_NET, 0); 296 #endif 297 } 298 299 void 300 lance_reset(sc) 301 struct lance_softc *sc; 302 { 303 int s; 304 305 s = splnet(); 306 lance_init(sc); 307 splx(s); 308 } 309 310 void 311 lance_stop(sc) 312 struct lance_softc *sc; 313 { 314 315 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP); 316 } 317 318 /* 319 * Initialization of interface; set up initialization block 320 * and transmit/receive descriptor rings. 321 */ 322 void 323 lance_init(sc) 324 struct lance_softc *sc; 325 { 326 int timo; 327 u_long a; 328 329 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP); 330 DELAY(100); 331 332 /* Newer LANCE chips have a reset register */ 333 if (sc->sc_hwreset) 334 (*sc->sc_hwreset)(sc); 335 336 /* Set the correct byte swapping mode, etc. */ 337 (*sc->sc_wrcsr)(sc, LE_CSR3, sc->sc_conf3); 338 339 /* Set up LANCE init block. */ 340 (*sc->sc_meminit)(sc); 341 342 /* Give LANCE the physical address of its init block. */ 343 a = sc->sc_addr + LE_INITADDR(sc); 344 (*sc->sc_wrcsr)(sc, LE_CSR1, a); 345 (*sc->sc_wrcsr)(sc, LE_CSR2, a >> 16); 346 347 /* Try to initialize the LANCE. */ 348 DELAY(100); 349 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INIT); 350 351 /* Wait for initialization to finish. */ 352 for (timo = 100000; timo; timo--) 353 if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON) 354 break; 355 356 if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON) { 357 /* Start the LANCE. */ 358 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_STRT | 359 LE_C0_IDON); 360 ifp->if_flags |= IFF_RUNNING; 361 ifp->if_flags &= ~IFF_OACTIVE; 362 ifp->if_timer = 0; 363 (*sc->sc_start)(ifp); 364 } else 365 printf("%s: controller failed to initialize\n", 366 sc->sc_dev.dv_xname); 367 if (sc->sc_hwinit) 368 (*sc->sc_hwinit)(sc); 369 } 370 371 /* 372 * Routine to copy from mbuf chain to transmit buffer in 373 * network buffer memory. 374 */ 375 int 376 lance_put(sc, boff, m) 377 struct lance_softc *sc; 378 int boff; 379 struct mbuf *m; 380 { 381 struct mbuf *n; 382 int len, tlen = 0; 383 384 for (; m; m = n) { 385 len = m->m_len; 386 if (len == 0) { 387 MFREE(m, n); 388 continue; 389 } 390 (*sc->sc_copytobuf)(sc, mtod(m, caddr_t), boff, len); 391 boff += len; 392 tlen += len; 393 MFREE(m, n); 394 } 395 if (tlen < LEMINSIZE) { 396 (*sc->sc_zerobuf)(sc, boff, LEMINSIZE - tlen); 397 tlen = LEMINSIZE; 398 } 399 return (tlen); 400 } 401 402 /* 403 * Pull data off an interface. 404 * Len is length of data, with local net header stripped. 405 * We copy the data into mbufs. When full cluster sized units are present 406 * we copy into clusters. 407 */ 408 integrate struct mbuf * 409 lance_get(sc, boff, totlen) 410 struct lance_softc *sc; 411 int boff, totlen; 412 { 413 struct mbuf *m, *m0, *newm; 414 int len; 415 416 MGETHDR(m0, M_DONTWAIT, MT_DATA); 417 if (m0 == 0) 418 return (0); 419 m0->m_pkthdr.rcvif = ifp; 420 m0->m_pkthdr.len = totlen; 421 len = MHLEN; 422 m = m0; 423 424 while (totlen > 0) { 425 if (totlen >= MINCLSIZE) { 426 MCLGET(m, M_DONTWAIT); 427 if ((m->m_flags & M_EXT) == 0) 428 goto bad; 429 len = MCLBYTES; 430 } 431 432 if (m == m0) { 433 caddr_t newdata = (caddr_t) 434 ALIGN(m->m_data + sizeof(struct ether_header)) - 435 sizeof(struct ether_header); 436 len -= newdata - m->m_data; 437 m->m_data = newdata; 438 } 439 440 m->m_len = len = min(totlen, len); 441 (*sc->sc_copyfrombuf)(sc, mtod(m, caddr_t), boff, len); 442 boff += len; 443 444 totlen -= len; 445 if (totlen > 0) { 446 MGET(newm, M_DONTWAIT, MT_DATA); 447 if (newm == 0) 448 goto bad; 449 len = MLEN; 450 m = m->m_next = newm; 451 } 452 } 453 454 return (m0); 455 456 bad: 457 m_freem(m0); 458 return (0); 459 } 460 461 /* 462 * Pass a packet to the higher levels. 463 */ 464 void 465 lance_read(sc, boff, len) 466 struct lance_softc *sc; 467 int boff, len; 468 { 469 struct mbuf *m; 470 471 if (len <= sizeof(struct ether_header) || 472 len > ((sc->sc_ethercom.ec_capenable & ETHERCAP_VLAN_MTU) ? 473 ETHER_VLAN_ENCAP_LEN + ETHERMTU + sizeof(struct ether_header) : 474 ETHERMTU + sizeof(struct ether_header))) { 475 #ifdef LEDEBUG 476 printf("%s: invalid packet size %d; dropping\n", 477 sc->sc_dev.dv_xname, len); 478 #endif 479 ifp->if_ierrors++; 480 return; 481 } 482 483 /* Pull packet off interface. */ 484 m = lance_get(sc, boff, len); 485 if (m == 0) { 486 ifp->if_ierrors++; 487 return; 488 } 489 490 ifp->if_ipackets++; 491 492 #if NBPFILTER > 0 493 /* 494 * Check if there's a BPF listener on this interface. 495 * If so, hand off the raw packet to BPF. 496 */ 497 if (ifp->if_bpf) 498 bpf_mtap(ifp->if_bpf, m); 499 #endif 500 501 #ifdef LANCE_REVC_BUG 502 /* 503 * The old LANCE (Rev. C) chips have a bug which causes 504 * garbage to be inserted in front of the received packet. 505 * The work-around is to ignore packets with an invalid 506 * destination address (garbage will usually not match). 507 * Of course, this precludes multicast support... 508 */ 509 if (ETHER_CMP(eh->ether_dhost, sc->sc_enaddr) && 510 ETHER_CMP(eh->ether_dhost, bcast_enaddr)) { 511 m_freem(m); 512 return; 513 } 514 #endif 515 516 /* Pass the packet up. */ 517 (*ifp->if_input)(ifp, m); 518 } 519 520 #undef ifp 521 522 void 523 lance_watchdog(ifp) 524 struct ifnet *ifp; 525 { 526 struct lance_softc *sc = ifp->if_softc; 527 528 log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname); 529 ++ifp->if_oerrors; 530 531 lance_reset(sc); 532 } 533 534 int 535 lance_mediachange(ifp) 536 struct ifnet *ifp; 537 { 538 struct lance_softc *sc = ifp->if_softc; 539 540 if (sc->sc_mediachange) 541 return ((*sc->sc_mediachange)(sc)); 542 return (0); 543 } 544 545 void 546 lance_mediastatus(ifp, ifmr) 547 struct ifnet *ifp; 548 struct ifmediareq *ifmr; 549 { 550 struct lance_softc *sc = ifp->if_softc; 551 552 if ((ifp->if_flags & IFF_UP) == 0) 553 return; 554 555 ifmr->ifm_status = IFM_AVALID; 556 if (sc->sc_havecarrier) 557 ifmr->ifm_status |= IFM_ACTIVE; 558 559 if (sc->sc_mediastatus) 560 (*sc->sc_mediastatus)(sc, ifmr); 561 } 562 563 /* 564 * Process an ioctl request. 565 */ 566 int 567 lance_ioctl(ifp, cmd, data) 568 struct ifnet *ifp; 569 u_long cmd; 570 caddr_t data; 571 { 572 struct lance_softc *sc = ifp->if_softc; 573 struct ifaddr *ifa = (struct ifaddr *)data; 574 struct ifreq *ifr = (struct ifreq *)data; 575 int s, error = 0; 576 577 s = splnet(); 578 579 switch (cmd) { 580 581 case SIOCSIFADDR: 582 ifp->if_flags |= IFF_UP; 583 584 switch (ifa->ifa_addr->sa_family) { 585 #ifdef INET 586 case AF_INET: 587 lance_init(sc); 588 arp_ifinit(ifp, ifa); 589 break; 590 #endif 591 #ifdef NS 592 case AF_NS: 593 { 594 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 595 596 if (ns_nullhost(*ina)) 597 ina->x_host = 598 *(union ns_host *)LLADDR(ifp->if_sadl); 599 else { 600 bcopy(ina->x_host.c_host, 601 LLADDR(ifp->if_sadl), 602 sizeof(sc->sc_enaddr)); 603 } 604 /* Set new address. */ 605 lance_init(sc); 606 break; 607 } 608 #endif 609 default: 610 lance_init(sc); 611 break; 612 } 613 break; 614 615 #if defined(CCITT) && defined(LLC) 616 case SIOCSIFCONF_X25: 617 ifp->if_flags |= IFF_UP; 618 ifa->ifa_rtrequest = cons_rtrequest; /* XXX */ 619 error = x25_llcglue(PRC_IFUP, ifa->ifa_addr); 620 if (error == 0) 621 lance_init(sc); 622 break; 623 #endif /* CCITT && LLC */ 624 625 case SIOCSIFFLAGS: 626 if ((ifp->if_flags & IFF_UP) == 0 && 627 (ifp->if_flags & IFF_RUNNING) != 0) { 628 /* 629 * If interface is marked down and it is running, then 630 * stop it. 631 */ 632 lance_stop(sc); 633 ifp->if_flags &= ~IFF_RUNNING; 634 } else if ((ifp->if_flags & IFF_UP) != 0 && 635 (ifp->if_flags & IFF_RUNNING) == 0) { 636 /* 637 * If interface is marked up and it is stopped, then 638 * start it. 639 */ 640 lance_init(sc); 641 } else if ((ifp->if_flags & IFF_UP) != 0) { 642 /* 643 * Reset the interface to pick up changes in any other 644 * flags that affect hardware registers. 645 */ 646 /*lance_stop(sc);*/ 647 lance_init(sc); 648 } 649 #ifdef LEDEBUG 650 if (ifp->if_flags & IFF_DEBUG) 651 sc->sc_debug = 1; 652 else 653 sc->sc_debug = 0; 654 #endif 655 break; 656 657 case SIOCADDMULTI: 658 case SIOCDELMULTI: 659 error = (cmd == SIOCADDMULTI) ? 660 ether_addmulti(ifr, &sc->sc_ethercom) : 661 ether_delmulti(ifr, &sc->sc_ethercom); 662 663 if (error == ENETRESET) { 664 /* 665 * Multicast list has changed; set the hardware filter 666 * accordingly. 667 */ 668 lance_reset(sc); 669 error = 0; 670 } 671 break; 672 673 case SIOCGIFMEDIA: 674 case SIOCSIFMEDIA: 675 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 676 break; 677 678 default: 679 error = EINVAL; 680 break; 681 } 682 683 splx(s); 684 return (error); 685 } 686 687 hide void 688 lance_shutdown(arg) 689 void *arg; 690 { 691 692 lance_stop((struct lance_softc *)arg); 693 } 694 695 /* 696 * Set up the logical address filter. 697 */ 698 void 699 lance_setladrf(ac, af) 700 struct ethercom *ac; 701 u_int16_t *af; 702 { 703 struct ifnet *ifp = &ac->ec_if; 704 struct ether_multi *enm; 705 u_int32_t crc; 706 struct ether_multistep step; 707 708 /* 709 * Set up multicast address filter by passing all multicast addresses 710 * through a crc generator, and then using the high order 6 bits as an 711 * index into the 64 bit logical address filter. The high order bit 712 * selects the word, while the rest of the bits select the bit within 713 * the word. 714 */ 715 716 if (ifp->if_flags & IFF_PROMISC) 717 goto allmulti; 718 719 af[0] = af[1] = af[2] = af[3] = 0x0000; 720 ETHER_FIRST_MULTI(step, ac, enm); 721 while (enm != NULL) { 722 if (ETHER_CMP(enm->enm_addrlo, enm->enm_addrhi)) { 723 /* 724 * We must listen to a range of multicast addresses. 725 * For now, just accept all multicasts, rather than 726 * trying to set only those filter bits needed to match 727 * the range. (At this time, the only use of address 728 * ranges is for IP multicast routing, for which the 729 * range is big enough to require all bits set.) 730 */ 731 goto allmulti; 732 } 733 734 crc = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN); 735 736 /* Just want the 6 most significant bits. */ 737 crc >>= 26; 738 739 /* Set the corresponding bit in the filter. */ 740 af[crc >> 4] |= 1 << (crc & 0xf); 741 742 ETHER_NEXT_MULTI(step, enm); 743 } 744 ifp->if_flags &= ~IFF_ALLMULTI; 745 return; 746 747 allmulti: 748 ifp->if_flags |= IFF_ALLMULTI; 749 af[0] = af[1] = af[2] = af[3] = 0xffff; 750 } 751 752 /* 753 * Routines for accessing the transmit and receive buffers. 754 * The various CPU and adapter configurations supported by this 755 * driver require three different access methods for buffers 756 * and descriptors: 757 * (1) contig (contiguous data; no padding), 758 * (2) gap2 (two bytes of data followed by two bytes of padding), 759 * (3) gap16 (16 bytes of data followed by 16 bytes of padding). 760 */ 761 762 /* 763 * contig: contiguous data with no padding. 764 * 765 * Buffers may have any alignment. 766 */ 767 768 void 769 lance_copytobuf_contig(sc, from, boff, len) 770 struct lance_softc *sc; 771 void *from; 772 int boff, len; 773 { 774 volatile caddr_t buf = sc->sc_mem; 775 776 /* 777 * Just call bcopy() to do the work. 778 */ 779 bcopy(from, buf + boff, len); 780 } 781 782 void 783 lance_copyfrombuf_contig(sc, to, boff, len) 784 struct lance_softc *sc; 785 void *to; 786 int boff, len; 787 { 788 volatile caddr_t buf = sc->sc_mem; 789 790 /* 791 * Just call bcopy() to do the work. 792 */ 793 bcopy(buf + boff, to, len); 794 } 795 796 void 797 lance_zerobuf_contig(sc, boff, len) 798 struct lance_softc *sc; 799 int boff, len; 800 { 801 volatile caddr_t buf = sc->sc_mem; 802 803 /* 804 * Just let bzero() do the work 805 */ 806 bzero(buf + boff, len); 807 } 808 809 #if 0 810 /* 811 * Examples only; duplicate these and tweak (if necessary) in 812 * machine-specific front-ends. 813 */ 814 815 /* 816 * gap2: two bytes of data followed by two bytes of pad. 817 * 818 * Buffers must be 4-byte aligned. The code doesn't worry about 819 * doing an extra byte. 820 */ 821 822 void 823 lance_copytobuf_gap2(sc, fromv, boff, len) 824 struct lance_softc *sc; 825 void *fromv; 826 int boff; 827 int len; 828 { 829 volatile caddr_t buf = sc->sc_mem; 830 caddr_t from = fromv; 831 volatile u_int16_t *bptr; 832 833 if (boff & 0x1) { 834 /* handle unaligned first byte */ 835 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 836 *bptr = (*from++ << 8) | (*bptr & 0xff); 837 bptr += 2; 838 len--; 839 } else 840 bptr = ((volatile u_int16_t *)buf) + boff; 841 while (len > 1) { 842 *bptr = (from[1] << 8) | (from[0] & 0xff); 843 bptr += 2; 844 from += 2; 845 len -= 2; 846 } 847 if (len == 1) 848 *bptr = (u_int16_t)*from; 849 } 850 851 void 852 lance_copyfrombuf_gap2(sc, tov, boff, len) 853 struct lance_softc *sc; 854 void *tov; 855 int boff, len; 856 { 857 volatile caddr_t buf = sc->sc_mem; 858 caddr_t to = tov; 859 volatile u_int16_t *bptr; 860 u_int16_t tmp; 861 862 if (boff & 0x1) { 863 /* handle unaligned first byte */ 864 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 865 *to++ = (*bptr >> 8) & 0xff; 866 bptr += 2; 867 len--; 868 } else 869 bptr = ((volatile u_int16_t *)buf) + boff; 870 while (len > 1) { 871 tmp = *bptr; 872 *to++ = tmp & 0xff; 873 *to++ = (tmp >> 8) & 0xff; 874 bptr += 2; 875 len -= 2; 876 } 877 if (len == 1) 878 *to = *bptr & 0xff; 879 } 880 881 void 882 lance_zerobuf_gap2(sc, boff, len) 883 struct lance_softc *sc; 884 int boff, len; 885 { 886 volatile caddr_t buf = sc->sc_mem; 887 volatile u_int16_t *bptr; 888 889 if ((unsigned)boff & 0x1) { 890 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 891 *bptr &= 0xff; 892 bptr += 2; 893 len--; 894 } else 895 bptr = ((volatile u_int16_t *)buf) + boff; 896 while (len > 0) { 897 *bptr = 0; 898 bptr += 2; 899 len -= 2; 900 } 901 } 902 903 /* 904 * gap16: 16 bytes of data followed by 16 bytes of pad. 905 * 906 * Buffers must be 32-byte aligned. 907 */ 908 909 void 910 lance_copytobuf_gap16(sc, fromv, boff, len) 911 struct lance_softc *sc; 912 void *fromv; 913 int boff; 914 int len; 915 { 916 volatile caddr_t buf = sc->sc_mem; 917 caddr_t from = fromv; 918 caddr_t bptr; 919 int xfer; 920 921 bptr = buf + ((boff << 1) & ~0x1f); 922 boff &= 0xf; 923 xfer = min(len, 16 - boff); 924 while (len > 0) { 925 bcopy(from, bptr + boff, xfer); 926 from += xfer; 927 bptr += 32; 928 boff = 0; 929 len -= xfer; 930 xfer = min(len, 16); 931 } 932 } 933 934 void 935 lance_copyfrombuf_gap16(sc, tov, boff, len) 936 struct lance_softc *sc; 937 void *tov; 938 int boff, len; 939 { 940 volatile caddr_t buf = sc->sc_mem; 941 caddr_t to = tov; 942 caddr_t bptr; 943 int xfer; 944 945 bptr = buf + ((boff << 1) & ~0x1f); 946 boff &= 0xf; 947 xfer = min(len, 16 - boff); 948 while (len > 0) { 949 bcopy(bptr + boff, to, xfer); 950 to += xfer; 951 bptr += 32; 952 boff = 0; 953 len -= xfer; 954 xfer = min(len, 16); 955 } 956 } 957 958 void 959 lance_zerobuf_gap16(sc, boff, len) 960 struct lance_softc *sc; 961 int boff, len; 962 { 963 volatile caddr_t buf = sc->sc_mem; 964 caddr_t bptr; 965 int xfer; 966 967 bptr = buf + ((boff << 1) & ~0x1f); 968 boff &= 0xf; 969 xfer = min(len, 16 - boff); 970 while (len > 0) { 971 bzero(bptr + boff, xfer); 972 bptr += 32; 973 boff = 0; 974 len -= xfer; 975 xfer = min(len, 16); 976 } 977 } 978 #endif /* Example only */ 979
Indexes created Fri Oct 17 09:09:57 GMT 2025