lance.c revision 1.28
1 /* $NetBSD: lance.c,v 1.28 2003/01/31 17:40:05 pk 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 <sys/cdefs.h> 79 __KERNEL_RCSID(0, "$NetBSD: lance.c,v 1.28 2003/01/31 17:40:05 pk Exp $"); 80 81 #include "opt_ccitt.h" 82 #include "opt_llc.h" 83 #include "bpfilter.h" 84 #include "rnd.h" 85 86 #include <sys/param.h> 87 #include <sys/systm.h> 88 #include <sys/mbuf.h> 89 #include <sys/syslog.h> 90 #include <sys/socket.h> 91 #include <sys/device.h> 92 #include <sys/malloc.h> 93 #include <sys/ioctl.h> 94 #include <sys/errno.h> 95 #if NRND > 0 96 #include <sys/rnd.h> 97 #endif 98 99 #include <net/if.h> 100 #include <net/if_dl.h> 101 #include <net/if_ether.h> 102 #include <net/if_media.h> 103 104 #if defined(CCITT) && defined(LLC) 105 #include <sys/socketvar.h> 106 #include <netccitt/x25.h> 107 #include <netccitt/pk.h> 108 #include <netccitt/pk_var.h> 109 #include <netccitt/pk_extern.h> 110 #endif 111 112 #if NBPFILTER > 0 113 #include <net/bpf.h> 114 #include <net/bpfdesc.h> 115 #endif 116 117 #include <dev/ic/lancereg.h> 118 #include <dev/ic/lancevar.h> 119 120 #if defined(_KERNEL_OPT) 121 #include "opt_ddb.h" 122 #endif 123 124 #ifdef DDB 125 #define integrate 126 #define hide 127 #else 128 #define integrate static __inline 129 #define hide static 130 #endif 131 132 integrate struct mbuf *lance_get __P((struct lance_softc *, int, int)); 133 134 hide void lance_shutdown __P((void *)); 135 136 int lance_mediachange __P((struct ifnet *)); 137 void lance_mediastatus __P((struct ifnet *, struct ifmediareq *)); 138 139 static inline u_int16_t ether_cmp __P((void *, void *)); 140 141 void lance_stop __P((struct ifnet *, int)); 142 int lance_ioctl __P((struct ifnet *, u_long, caddr_t)); 143 void lance_watchdog __P((struct ifnet *)); 144 145 /* 146 * Compare two Ether/802 addresses for equality, inlined and 147 * unrolled for speed. Use this like memcmp(). 148 * 149 * XXX: Add <machine/inlines.h> for stuff like this? 150 * XXX: or maybe add it to libkern.h instead? 151 * 152 * "I'd love to have an inline assembler version of this." 153 * XXX: Who wanted that? mycroft? I wrote one, but this 154 * version in C is as good as hand-coded assembly. -gwr 155 * 156 * Please do NOT tweak this without looking at the actual 157 * assembly code generated before and after your tweaks! 158 */ 159 static inline u_int16_t 160 ether_cmp(one, two) 161 void *one, *two; 162 { 163 u_int16_t *a = (u_short *) one; 164 u_int16_t *b = (u_short *) two; 165 u_int16_t diff; 166 167 #ifdef m68k 168 /* 169 * The post-increment-pointer form produces the best 170 * machine code for m68k. This was carefully tuned 171 * so it compiles to just 8 short (2-byte) op-codes! 172 */ 173 diff = *a++ - *b++; 174 diff |= *a++ - *b++; 175 diff |= *a++ - *b++; 176 #else 177 /* 178 * Most modern CPUs do better with a single expresion. 179 * Note that short-cut evaluation is NOT helpful here, 180 * because it just makes the code longer, not faster! 181 */ 182 diff = (a[0] - b[0]) | (a[1] - b[1]) | (a[2] - b[2]); 183 #endif 184 185 return (diff); 186 } 187 188 #define ETHER_CMP ether_cmp 189 190 #ifdef LANCE_REVC_BUG 191 /* Make sure this is short-aligned, for ether_cmp(). */ 192 static u_int16_t bcast_enaddr[3] = { ~0, ~0, ~0 }; 193 #endif 194 195 void 196 lance_config(sc) 197 struct lance_softc *sc; 198 { 199 int i, nbuf; 200 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 201 202 /* Initialize ifnet structure. */ 203 strcpy(ifp->if_xname, sc->sc_dev.dv_xname); 204 ifp->if_softc = sc; 205 ifp->if_start = sc->sc_start; 206 ifp->if_ioctl = lance_ioctl; 207 ifp->if_watchdog = lance_watchdog; 208 ifp->if_init = lance_init; 209 ifp->if_stop = lance_stop; 210 ifp->if_flags = 211 IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; 212 #ifdef LANCE_REVC_BUG 213 ifp->if_flags &= ~IFF_MULTICAST; 214 #endif 215 IFQ_SET_READY(&ifp->if_snd); 216 217 /* Initialize ifmedia structures. */ 218 ifmedia_init(&sc->sc_media, 0, lance_mediachange, lance_mediastatus); 219 if (sc->sc_supmedia != NULL) { 220 for (i = 0; i < sc->sc_nsupmedia; i++) 221 ifmedia_add(&sc->sc_media, sc->sc_supmedia[i], 222 0, NULL); 223 ifmedia_set(&sc->sc_media, sc->sc_defaultmedia); 224 } else { 225 ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); 226 ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); 227 } 228 229 switch (sc->sc_memsize) { 230 case 8192: 231 sc->sc_nrbuf = 4; 232 sc->sc_ntbuf = 1; 233 break; 234 case 16384: 235 sc->sc_nrbuf = 8; 236 sc->sc_ntbuf = 2; 237 break; 238 case 32768: 239 sc->sc_nrbuf = 16; 240 sc->sc_ntbuf = 4; 241 break; 242 case 65536: 243 sc->sc_nrbuf = 32; 244 sc->sc_ntbuf = 8; 245 break; 246 case 131072: 247 sc->sc_nrbuf = 64; 248 sc->sc_ntbuf = 16; 249 break; 250 case 262144: 251 sc->sc_nrbuf = 128; 252 sc->sc_ntbuf = 32; 253 break; 254 default: 255 /* weird memory size; cope with it */ 256 nbuf = sc->sc_memsize / LEBLEN; 257 sc->sc_ntbuf = nbuf / 5; 258 sc->sc_nrbuf = nbuf - sc->sc_ntbuf; 259 } 260 261 printf(": address %s\n", ether_sprintf(sc->sc_enaddr)); 262 printf("%s: %d receive buffers, %d transmit buffers\n", 263 sc->sc_dev.dv_xname, sc->sc_nrbuf, sc->sc_ntbuf); 264 265 /* Make sure the chip is stopped. */ 266 lance_stop(ifp, 0); 267 268 /* claim 802.1q capability */ 269 sc->sc_ethercom.ec_capabilities |= ETHERCAP_VLAN_MTU; 270 /* Attach the interface. */ 271 if_attach(ifp); 272 ether_ifattach(ifp, sc->sc_enaddr); 273 274 sc->sc_sh = shutdownhook_establish(lance_shutdown, ifp); 275 if (sc->sc_sh == NULL) 276 panic("lance_config: can't establish shutdownhook"); 277 sc->sc_rbufaddr = malloc(sc->sc_nrbuf * sizeof(int), M_DEVBUF, 278 M_WAITOK); 279 sc->sc_tbufaddr = malloc(sc->sc_ntbuf * sizeof(int), M_DEVBUF, 280 M_WAITOK); 281 282 #if NRND > 0 283 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 284 RND_TYPE_NET, 0); 285 #endif 286 } 287 288 void 289 lance_reset(sc) 290 struct lance_softc *sc; 291 { 292 int s; 293 294 s = splnet(); 295 lance_init(&sc->sc_ethercom.ec_if); 296 splx(s); 297 } 298 299 void 300 lance_stop(ifp, disable) 301 struct ifnet *ifp; 302 int disable; 303 { 304 struct lance_softc *sc = ifp->if_softc; 305 306 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP); 307 } 308 309 /* 310 * Initialization of interface; set up initialization block 311 * and transmit/receive descriptor rings. 312 */ 313 int 314 lance_init(ifp) 315 struct ifnet *ifp; 316 { 317 struct lance_softc *sc = ifp->if_softc; 318 int timo; 319 u_long a; 320 321 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP); 322 DELAY(100); 323 324 /* Newer LANCE chips have a reset register */ 325 if (sc->sc_hwreset) 326 (*sc->sc_hwreset)(sc); 327 328 /* Set the correct byte swapping mode, etc. */ 329 (*sc->sc_wrcsr)(sc, LE_CSR3, sc->sc_conf3); 330 331 /* Set up LANCE init block. */ 332 (*sc->sc_meminit)(sc); 333 334 /* Give LANCE the physical address of its init block. */ 335 a = sc->sc_addr + LE_INITADDR(sc); 336 (*sc->sc_wrcsr)(sc, LE_CSR1, a); 337 (*sc->sc_wrcsr)(sc, LE_CSR2, a >> 16); 338 339 /* Try to initialize the LANCE. */ 340 DELAY(100); 341 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INIT); 342 343 /* Wait for initialization to finish. */ 344 for (timo = 100000; timo; timo--) 345 if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON) 346 break; 347 348 if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON) { 349 /* Start the LANCE. */ 350 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_STRT); 351 ifp->if_flags |= IFF_RUNNING; 352 ifp->if_flags &= ~IFF_OACTIVE; 353 ifp->if_timer = 0; 354 (*sc->sc_start)(ifp); 355 } else 356 printf("%s: controller failed to initialize\n", 357 sc->sc_dev.dv_xname); 358 if (sc->sc_hwinit) 359 (*sc->sc_hwinit)(sc); 360 361 return (0); 362 } 363 364 /* 365 * Routine to copy from mbuf chain to transmit buffer in 366 * network buffer memory. 367 */ 368 int 369 lance_put(sc, boff, m) 370 struct lance_softc *sc; 371 int boff; 372 struct mbuf *m; 373 { 374 struct mbuf *n; 375 int len, tlen = 0; 376 377 for (; m; m = n) { 378 len = m->m_len; 379 if (len == 0) { 380 MFREE(m, n); 381 continue; 382 } 383 (*sc->sc_copytobuf)(sc, mtod(m, caddr_t), boff, len); 384 boff += len; 385 tlen += len; 386 MFREE(m, n); 387 } 388 if (tlen < LEMINSIZE) { 389 (*sc->sc_zerobuf)(sc, boff, LEMINSIZE - tlen); 390 tlen = LEMINSIZE; 391 } 392 return (tlen); 393 } 394 395 /* 396 * Pull data off an interface. 397 * Len is length of data, with local net header stripped. 398 * We copy the data into mbufs. When full cluster sized units are present 399 * we copy into clusters. 400 */ 401 integrate struct mbuf * 402 lance_get(sc, boff, totlen) 403 struct lance_softc *sc; 404 int boff, totlen; 405 { 406 struct mbuf *m, *m0, *newm; 407 int len; 408 409 MGETHDR(m0, M_DONTWAIT, MT_DATA); 410 if (m0 == 0) 411 return (0); 412 m0->m_pkthdr.rcvif = &sc->sc_ethercom.ec_if; 413 m0->m_pkthdr.len = totlen; 414 len = MHLEN; 415 m = m0; 416 417 while (totlen > 0) { 418 if (totlen >= MINCLSIZE) { 419 MCLGET(m, M_DONTWAIT); 420 if ((m->m_flags & M_EXT) == 0) 421 goto bad; 422 len = MCLBYTES; 423 } 424 425 if (m == m0) { 426 caddr_t newdata = (caddr_t) 427 ALIGN(m->m_data + sizeof(struct ether_header)) - 428 sizeof(struct ether_header); 429 len -= newdata - m->m_data; 430 m->m_data = newdata; 431 } 432 433 m->m_len = len = min(totlen, len); 434 (*sc->sc_copyfrombuf)(sc, mtod(m, caddr_t), boff, len); 435 boff += len; 436 437 totlen -= len; 438 if (totlen > 0) { 439 MGET(newm, M_DONTWAIT, MT_DATA); 440 if (newm == 0) 441 goto bad; 442 len = MLEN; 443 m = m->m_next = newm; 444 } 445 } 446 447 return (m0); 448 449 bad: 450 m_freem(m0); 451 return (0); 452 } 453 454 /* 455 * Pass a packet to the higher levels. 456 */ 457 void 458 lance_read(sc, boff, len) 459 struct lance_softc *sc; 460 int boff, len; 461 { 462 struct mbuf *m; 463 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 464 struct ether_header *eh; 465 466 if (len <= sizeof(struct ether_header) || 467 len > ((sc->sc_ethercom.ec_capenable & ETHERCAP_VLAN_MTU) ? 468 ETHER_VLAN_ENCAP_LEN + ETHERMTU + sizeof(struct ether_header) : 469 ETHERMTU + sizeof(struct ether_header))) { 470 #ifdef LEDEBUG 471 printf("%s: invalid packet size %d; dropping\n", 472 sc->sc_dev.dv_xname, len); 473 #endif 474 ifp->if_ierrors++; 475 return; 476 } 477 478 /* Pull packet off interface. */ 479 m = lance_get(sc, boff, len); 480 if (m == 0) { 481 ifp->if_ierrors++; 482 return; 483 } 484 485 ifp->if_ipackets++; 486 487 eh = mtod(m, struct ether_header *); 488 489 #ifdef LANCE_REVC_BUG 490 /* 491 * The old LANCE (Rev. C) chips have a bug which causes 492 * garbage to be inserted in front of the received packet. 493 * The work-around is to ignore packets with an invalid 494 * destination address (garbage will usually not match). 495 * Of course, this precludes multicast support... 496 */ 497 if (ETHER_CMP(eh->ether_dhost, sc->sc_enaddr) && 498 ETHER_CMP(eh->ether_dhost, bcast_enaddr)) { 499 m_freem(m); 500 return; 501 } 502 #endif 503 504 /* 505 * Some lance device does not present IFF_SIMPLEX behavior on multicast 506 * packets. Make sure to drop it if it is from ourselves. 507 */ 508 if (!ETHER_CMP(eh->ether_shost, sc->sc_enaddr)) { 509 m_freem(m); 510 return; 511 } 512 513 #if NBPFILTER > 0 514 /* 515 * Check if there's a BPF listener on this interface. 516 * If so, hand off the raw packet to BPF. 517 */ 518 if (ifp->if_bpf) 519 bpf_mtap(ifp->if_bpf, m); 520 #endif 521 522 /* Pass the packet up. */ 523 (*ifp->if_input)(ifp, m); 524 } 525 526 #undef ifp 527 528 void 529 lance_watchdog(ifp) 530 struct ifnet *ifp; 531 { 532 struct lance_softc *sc = ifp->if_softc; 533 534 log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname); 535 ++ifp->if_oerrors; 536 537 lance_reset(sc); 538 } 539 540 int 541 lance_mediachange(ifp) 542 struct ifnet *ifp; 543 { 544 struct lance_softc *sc = ifp->if_softc; 545 546 if (sc->sc_mediachange) 547 return ((*sc->sc_mediachange)(sc)); 548 return (0); 549 } 550 551 void 552 lance_mediastatus(ifp, ifmr) 553 struct ifnet *ifp; 554 struct ifmediareq *ifmr; 555 { 556 struct lance_softc *sc = ifp->if_softc; 557 558 if ((ifp->if_flags & IFF_UP) == 0) 559 return; 560 561 ifmr->ifm_status = IFM_AVALID; 562 if (sc->sc_havecarrier) 563 ifmr->ifm_status |= IFM_ACTIVE; 564 565 if (sc->sc_mediastatus) 566 (*sc->sc_mediastatus)(sc, ifmr); 567 } 568 569 /* 570 * Process an ioctl request. 571 */ 572 int 573 lance_ioctl(ifp, cmd, data) 574 struct ifnet *ifp; 575 u_long cmd; 576 caddr_t data; 577 { 578 struct lance_softc *sc = ifp->if_softc; 579 struct ifreq *ifr = (struct ifreq *)data; 580 int s, error = 0; 581 582 s = splnet(); 583 584 switch (cmd) { 585 586 case SIOCSIFADDR: 587 case SIOCSIFFLAGS: 588 error = ether_ioctl(ifp, cmd, data); 589 break; 590 591 #if defined(CCITT) && defined(LLC) 592 case SIOCSIFCONF_X25: 593 { 594 struct ifaddr *ifa = (struct ifaddr *) data; 595 596 ifp->if_flags |= IFF_UP; 597 ifa->ifa_rtrequest = cons_rtrequest; /* XXX */ 598 error = x25_llcglue(PRC_IFUP, ifa->ifa_addr); 599 if (error == 0) 600 lance_init(&sc->sc_ethercom.ec_if); 601 break; 602 } 603 #endif /* CCITT && LLC */ 604 605 case SIOCADDMULTI: 606 case SIOCDELMULTI: 607 error = (cmd == SIOCADDMULTI) ? 608 ether_addmulti(ifr, &sc->sc_ethercom) : 609 ether_delmulti(ifr, &sc->sc_ethercom); 610 611 if (error == ENETRESET) { 612 /* 613 * Multicast list has changed; set the hardware filter 614 * accordingly. 615 */ 616 lance_reset(sc); 617 error = 0; 618 } 619 break; 620 621 case SIOCGIFMEDIA: 622 case SIOCSIFMEDIA: 623 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 624 break; 625 626 default: 627 error = EINVAL; 628 break; 629 } 630 631 splx(s); 632 return (error); 633 } 634 635 hide void 636 lance_shutdown(arg) 637 void *arg; 638 { 639 640 lance_stop((struct ifnet *)arg, 0); 641 } 642 643 /* 644 * Set up the logical address filter. 645 */ 646 void 647 lance_setladrf(ac, af) 648 struct ethercom *ac; 649 u_int16_t *af; 650 { 651 struct ifnet *ifp = &ac->ec_if; 652 struct ether_multi *enm; 653 u_int32_t crc; 654 struct ether_multistep step; 655 656 /* 657 * Set up multicast address filter by passing all multicast addresses 658 * through a crc generator, and then using the high order 6 bits as an 659 * index into the 64 bit logical address filter. The high order bit 660 * selects the word, while the rest of the bits select the bit within 661 * the word. 662 */ 663 664 if (ifp->if_flags & IFF_PROMISC) 665 goto allmulti; 666 667 af[0] = af[1] = af[2] = af[3] = 0x0000; 668 ETHER_FIRST_MULTI(step, ac, enm); 669 while (enm != NULL) { 670 if (ETHER_CMP(enm->enm_addrlo, enm->enm_addrhi)) { 671 /* 672 * We must listen to a range of multicast addresses. 673 * For now, just accept all multicasts, rather than 674 * trying to set only those filter bits needed to match 675 * the range. (At this time, the only use of address 676 * ranges is for IP multicast routing, for which the 677 * range is big enough to require all bits set.) 678 */ 679 goto allmulti; 680 } 681 682 crc = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN); 683 684 /* Just want the 6 most significant bits. */ 685 crc >>= 26; 686 687 /* Set the corresponding bit in the filter. */ 688 af[crc >> 4] |= 1 << (crc & 0xf); 689 690 ETHER_NEXT_MULTI(step, enm); 691 } 692 ifp->if_flags &= ~IFF_ALLMULTI; 693 return; 694 695 allmulti: 696 ifp->if_flags |= IFF_ALLMULTI; 697 af[0] = af[1] = af[2] = af[3] = 0xffff; 698 } 699 700 /* 701 * Routines for accessing the transmit and receive buffers. 702 * The various CPU and adapter configurations supported by this 703 * driver require three different access methods for buffers 704 * and descriptors: 705 * (1) contig (contiguous data; no padding), 706 * (2) gap2 (two bytes of data followed by two bytes of padding), 707 * (3) gap16 (16 bytes of data followed by 16 bytes of padding). 708 */ 709 710 /* 711 * contig: contiguous data with no padding. 712 * 713 * Buffers may have any alignment. 714 */ 715 716 void 717 lance_copytobuf_contig(sc, from, boff, len) 718 struct lance_softc *sc; 719 void *from; 720 int boff, len; 721 { 722 volatile caddr_t buf = sc->sc_mem; 723 724 /* 725 * Just call memcpy() to do the work. 726 */ 727 memcpy(buf + boff, from, len); 728 } 729 730 void 731 lance_copyfrombuf_contig(sc, to, boff, len) 732 struct lance_softc *sc; 733 void *to; 734 int boff, len; 735 { 736 volatile caddr_t buf = sc->sc_mem; 737 738 /* 739 * Just call memcpy() to do the work. 740 */ 741 memcpy(to, buf + boff, len); 742 } 743 744 void 745 lance_zerobuf_contig(sc, boff, len) 746 struct lance_softc *sc; 747 int boff, len; 748 { 749 volatile caddr_t buf = sc->sc_mem; 750 751 /* 752 * Just let memset() do the work 753 */ 754 memset(buf + boff, 0, len); 755 } 756 757 #if 0 758 /* 759 * Examples only; duplicate these and tweak (if necessary) in 760 * machine-specific front-ends. 761 */ 762 763 /* 764 * gap2: two bytes of data followed by two bytes of pad. 765 * 766 * Buffers must be 4-byte aligned. The code doesn't worry about 767 * doing an extra byte. 768 */ 769 770 void 771 lance_copytobuf_gap2(sc, fromv, boff, len) 772 struct lance_softc *sc; 773 void *fromv; 774 int boff; 775 int len; 776 { 777 volatile caddr_t buf = sc->sc_mem; 778 caddr_t from = fromv; 779 volatile u_int16_t *bptr; 780 781 if (boff & 0x1) { 782 /* handle unaligned first byte */ 783 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 784 *bptr = (*from++ << 8) | (*bptr & 0xff); 785 bptr += 2; 786 len--; 787 } else 788 bptr = ((volatile u_int16_t *)buf) + boff; 789 while (len > 1) { 790 *bptr = (from[1] << 8) | (from[0] & 0xff); 791 bptr += 2; 792 from += 2; 793 len -= 2; 794 } 795 if (len == 1) 796 *bptr = (u_int16_t)*from; 797 } 798 799 void 800 lance_copyfrombuf_gap2(sc, tov, boff, len) 801 struct lance_softc *sc; 802 void *tov; 803 int boff, len; 804 { 805 volatile caddr_t buf = sc->sc_mem; 806 caddr_t to = tov; 807 volatile u_int16_t *bptr; 808 u_int16_t tmp; 809 810 if (boff & 0x1) { 811 /* handle unaligned first byte */ 812 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 813 *to++ = (*bptr >> 8) & 0xff; 814 bptr += 2; 815 len--; 816 } else 817 bptr = ((volatile u_int16_t *)buf) + boff; 818 while (len > 1) { 819 tmp = *bptr; 820 *to++ = tmp & 0xff; 821 *to++ = (tmp >> 8) & 0xff; 822 bptr += 2; 823 len -= 2; 824 } 825 if (len == 1) 826 *to = *bptr & 0xff; 827 } 828 829 void 830 lance_zerobuf_gap2(sc, boff, len) 831 struct lance_softc *sc; 832 int boff, len; 833 { 834 volatile caddr_t buf = sc->sc_mem; 835 volatile u_int16_t *bptr; 836 837 if ((unsigned)boff & 0x1) { 838 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 839 *bptr &= 0xff; 840 bptr += 2; 841 len--; 842 } else 843 bptr = ((volatile u_int16_t *)buf) + boff; 844 while (len > 0) { 845 *bptr = 0; 846 bptr += 2; 847 len -= 2; 848 } 849 } 850 851 /* 852 * gap16: 16 bytes of data followed by 16 bytes of pad. 853 * 854 * Buffers must be 32-byte aligned. 855 */ 856 857 void 858 lance_copytobuf_gap16(sc, fromv, boff, len) 859 struct lance_softc *sc; 860 void *fromv; 861 int boff; 862 int len; 863 { 864 volatile caddr_t buf = sc->sc_mem; 865 caddr_t from = fromv; 866 caddr_t bptr; 867 int xfer; 868 869 bptr = buf + ((boff << 1) & ~0x1f); 870 boff &= 0xf; 871 xfer = min(len, 16 - boff); 872 while (len > 0) { 873 memcpy(bptr + boff, from, xfer); 874 from += xfer; 875 bptr += 32; 876 boff = 0; 877 len -= xfer; 878 xfer = min(len, 16); 879 } 880 } 881 882 void 883 lance_copyfrombuf_gap16(sc, tov, boff, len) 884 struct lance_softc *sc; 885 void *tov; 886 int boff, len; 887 { 888 volatile caddr_t buf = sc->sc_mem; 889 caddr_t to = tov; 890 caddr_t bptr; 891 int xfer; 892 893 bptr = buf + ((boff << 1) & ~0x1f); 894 boff &= 0xf; 895 xfer = min(len, 16 - boff); 896 while (len > 0) { 897 memcpy(to, bptr + boff, xfer); 898 to += xfer; 899 bptr += 32; 900 boff = 0; 901 len -= xfer; 902 xfer = min(len, 16); 903 } 904 } 905 906 void 907 lance_zerobuf_gap16(sc, boff, len) 908 struct lance_softc *sc; 909 int boff, len; 910 { 911 volatile caddr_t buf = sc->sc_mem; 912 caddr_t bptr; 913 int xfer; 914 915 bptr = buf + ((boff << 1) & ~0x1f); 916 boff &= 0xf; 917 xfer = min(len, 16 - boff); 918 while (len > 0) { 919 memset(bptr + boff, 0, xfer); 920 bptr += 32; 921 boff = 0; 922 len -= xfer; 923 xfer = min(len, 16); 924 } 925 } 926 #endif /* Example only */ 927
Indexes created Thu Sep 25 02:09:54 GMT 2025