lance.c revision 1.30
1 /* $NetBSD: lance.c,v 1.30 2004/10/30 18:08:37 thorpej 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. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * @(#)if_le.c 8.2 (Berkeley) 11/16/93 72 */ 73 74 #include <sys/cdefs.h> 75 __KERNEL_RCSID(0, "$NetBSD: lance.c,v 1.30 2004/10/30 18:08:37 thorpej Exp $"); 76 77 #include "opt_ccitt.h" 78 #include "opt_llc.h" 79 #include "bpfilter.h" 80 #include "rnd.h" 81 82 #include <sys/param.h> 83 #include <sys/systm.h> 84 #include <sys/mbuf.h> 85 #include <sys/syslog.h> 86 #include <sys/socket.h> 87 #include <sys/device.h> 88 #include <sys/malloc.h> 89 #include <sys/ioctl.h> 90 #include <sys/errno.h> 91 #if NRND > 0 92 #include <sys/rnd.h> 93 #endif 94 95 #include <net/if.h> 96 #include <net/if_dl.h> 97 #include <net/if_ether.h> 98 #include <net/if_media.h> 99 100 #if defined(CCITT) && defined(LLC) 101 #include <sys/socketvar.h> 102 #include <netccitt/x25.h> 103 #include <netccitt/pk.h> 104 #include <netccitt/pk_var.h> 105 #include <netccitt/pk_extern.h> 106 #endif 107 108 #if NBPFILTER > 0 109 #include <net/bpf.h> 110 #include <net/bpfdesc.h> 111 #endif 112 113 #include <dev/ic/lancereg.h> 114 #include <dev/ic/lancevar.h> 115 116 #if defined(_KERNEL_OPT) 117 #include "opt_ddb.h" 118 #endif 119 120 #ifdef DDB 121 #define integrate 122 #define hide 123 #else 124 #define integrate static __inline 125 #define hide static 126 #endif 127 128 integrate struct mbuf *lance_get __P((struct lance_softc *, int, int)); 129 130 hide void lance_shutdown __P((void *)); 131 132 int lance_mediachange __P((struct ifnet *)); 133 void lance_mediastatus __P((struct ifnet *, struct ifmediareq *)); 134 135 static inline u_int16_t ether_cmp __P((void *, void *)); 136 137 void lance_stop __P((struct ifnet *, int)); 138 int lance_ioctl __P((struct ifnet *, u_long, caddr_t)); 139 void lance_watchdog __P((struct ifnet *)); 140 141 /* 142 * Compare two Ether/802 addresses for equality, inlined and 143 * unrolled for speed. Use this like memcmp(). 144 * 145 * XXX: Add <machine/inlines.h> for stuff like this? 146 * XXX: or maybe add it to libkern.h instead? 147 * 148 * "I'd love to have an inline assembler version of this." 149 * XXX: Who wanted that? mycroft? I wrote one, but this 150 * version in C is as good as hand-coded assembly. -gwr 151 * 152 * Please do NOT tweak this without looking at the actual 153 * assembly code generated before and after your tweaks! 154 */ 155 static inline u_int16_t 156 ether_cmp(one, two) 157 void *one, *two; 158 { 159 u_int16_t *a = (u_short *) one; 160 u_int16_t *b = (u_short *) two; 161 u_int16_t diff; 162 163 #ifdef m68k 164 /* 165 * The post-increment-pointer form produces the best 166 * machine code for m68k. This was carefully tuned 167 * so it compiles to just 8 short (2-byte) op-codes! 168 */ 169 diff = *a++ - *b++; 170 diff |= *a++ - *b++; 171 diff |= *a++ - *b++; 172 #else 173 /* 174 * Most modern CPUs do better with a single expresion. 175 * Note that short-cut evaluation is NOT helpful here, 176 * because it just makes the code longer, not faster! 177 */ 178 diff = (a[0] - b[0]) | (a[1] - b[1]) | (a[2] - b[2]); 179 #endif 180 181 return (diff); 182 } 183 184 #define ETHER_CMP ether_cmp 185 186 #ifdef LANCE_REVC_BUG 187 /* Make sure this is short-aligned, for ether_cmp(). */ 188 static u_int16_t bcast_enaddr[3] = { ~0, ~0, ~0 }; 189 #endif 190 191 void 192 lance_config(sc) 193 struct lance_softc *sc; 194 { 195 int i, nbuf; 196 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 197 198 /* Initialize ifnet structure. */ 199 strcpy(ifp->if_xname, sc->sc_dev.dv_xname); 200 ifp->if_softc = sc; 201 ifp->if_start = sc->sc_start; 202 ifp->if_ioctl = lance_ioctl; 203 ifp->if_watchdog = lance_watchdog; 204 ifp->if_init = lance_init; 205 ifp->if_stop = lance_stop; 206 ifp->if_flags = 207 IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; 208 #ifdef LANCE_REVC_BUG 209 ifp->if_flags &= ~IFF_MULTICAST; 210 #endif 211 IFQ_SET_READY(&ifp->if_snd); 212 213 /* Initialize ifmedia structures. */ 214 ifmedia_init(&sc->sc_media, 0, lance_mediachange, lance_mediastatus); 215 if (sc->sc_supmedia != NULL) { 216 for (i = 0; i < sc->sc_nsupmedia; i++) 217 ifmedia_add(&sc->sc_media, sc->sc_supmedia[i], 218 0, NULL); 219 ifmedia_set(&sc->sc_media, sc->sc_defaultmedia); 220 } else { 221 ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); 222 ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); 223 } 224 225 switch (sc->sc_memsize) { 226 case 8192: 227 sc->sc_nrbuf = 4; 228 sc->sc_ntbuf = 1; 229 break; 230 case 16384: 231 sc->sc_nrbuf = 8; 232 sc->sc_ntbuf = 2; 233 break; 234 case 32768: 235 sc->sc_nrbuf = 16; 236 sc->sc_ntbuf = 4; 237 break; 238 case 65536: 239 sc->sc_nrbuf = 32; 240 sc->sc_ntbuf = 8; 241 break; 242 case 131072: 243 sc->sc_nrbuf = 64; 244 sc->sc_ntbuf = 16; 245 break; 246 case 262144: 247 sc->sc_nrbuf = 128; 248 sc->sc_ntbuf = 32; 249 break; 250 default: 251 /* weird memory size; cope with it */ 252 nbuf = sc->sc_memsize / LEBLEN; 253 sc->sc_ntbuf = nbuf / 5; 254 sc->sc_nrbuf = nbuf - sc->sc_ntbuf; 255 } 256 257 printf(": address %s\n", ether_sprintf(sc->sc_enaddr)); 258 printf("%s: %d receive buffers, %d transmit buffers\n", 259 sc->sc_dev.dv_xname, sc->sc_nrbuf, sc->sc_ntbuf); 260 261 /* Make sure the chip is stopped. */ 262 lance_stop(ifp, 0); 263 264 /* claim 802.1q capability */ 265 sc->sc_ethercom.ec_capabilities |= ETHERCAP_VLAN_MTU; 266 /* Attach the interface. */ 267 if_attach(ifp); 268 ether_ifattach(ifp, sc->sc_enaddr); 269 270 sc->sc_sh = shutdownhook_establish(lance_shutdown, ifp); 271 if (sc->sc_sh == NULL) 272 panic("lance_config: can't establish shutdownhook"); 273 sc->sc_rbufaddr = malloc(sc->sc_nrbuf * sizeof(int), M_DEVBUF, 274 M_WAITOK); 275 sc->sc_tbufaddr = malloc(sc->sc_ntbuf * sizeof(int), M_DEVBUF, 276 M_WAITOK); 277 278 #if NRND > 0 279 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 280 RND_TYPE_NET, 0); 281 #endif 282 } 283 284 void 285 lance_reset(sc) 286 struct lance_softc *sc; 287 { 288 int s; 289 290 s = splnet(); 291 lance_init(&sc->sc_ethercom.ec_if); 292 splx(s); 293 } 294 295 void 296 lance_stop(ifp, disable) 297 struct ifnet *ifp; 298 int disable; 299 { 300 struct lance_softc *sc = ifp->if_softc; 301 302 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP); 303 } 304 305 /* 306 * Initialization of interface; set up initialization block 307 * and transmit/receive descriptor rings. 308 */ 309 int 310 lance_init(ifp) 311 struct ifnet *ifp; 312 { 313 struct lance_softc *sc = ifp->if_softc; 314 int timo; 315 u_long a; 316 317 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP); 318 DELAY(100); 319 320 /* Newer LANCE chips have a reset register */ 321 if (sc->sc_hwreset) 322 (*sc->sc_hwreset)(sc); 323 324 /* Set the correct byte swapping mode, etc. */ 325 (*sc->sc_wrcsr)(sc, LE_CSR3, sc->sc_conf3); 326 327 /* Set up LANCE init block. */ 328 (*sc->sc_meminit)(sc); 329 330 /* Give LANCE the physical address of its init block. */ 331 a = sc->sc_addr + LE_INITADDR(sc); 332 (*sc->sc_wrcsr)(sc, LE_CSR1, a); 333 (*sc->sc_wrcsr)(sc, LE_CSR2, a >> 16); 334 335 /* Try to initialize the LANCE. */ 336 DELAY(100); 337 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INIT); 338 339 /* Wait for initialization to finish. */ 340 for (timo = 100000; timo; timo--) 341 if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON) 342 break; 343 344 if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON) { 345 /* Start the LANCE. */ 346 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_STRT); 347 ifp->if_flags |= IFF_RUNNING; 348 ifp->if_flags &= ~IFF_OACTIVE; 349 ifp->if_timer = 0; 350 (*sc->sc_start)(ifp); 351 } else 352 printf("%s: controller failed to initialize\n", 353 sc->sc_dev.dv_xname); 354 if (sc->sc_hwinit) 355 (*sc->sc_hwinit)(sc); 356 357 return (0); 358 } 359 360 /* 361 * Routine to copy from mbuf chain to transmit buffer in 362 * network buffer memory. 363 */ 364 int 365 lance_put(sc, boff, m) 366 struct lance_softc *sc; 367 int boff; 368 struct mbuf *m; 369 { 370 struct mbuf *n; 371 int len, tlen = 0; 372 373 for (; m; m = n) { 374 len = m->m_len; 375 if (len == 0) { 376 MFREE(m, n); 377 continue; 378 } 379 (*sc->sc_copytobuf)(sc, mtod(m, caddr_t), boff, len); 380 boff += len; 381 tlen += len; 382 MFREE(m, n); 383 } 384 if (tlen < LEMINSIZE) { 385 (*sc->sc_zerobuf)(sc, boff, LEMINSIZE - tlen); 386 tlen = LEMINSIZE; 387 } 388 return (tlen); 389 } 390 391 /* 392 * Pull data off an interface. 393 * Len is length of data, with local net header stripped. 394 * We copy the data into mbufs. When full cluster sized units are present 395 * we copy into clusters. 396 */ 397 integrate struct mbuf * 398 lance_get(sc, boff, totlen) 399 struct lance_softc *sc; 400 int boff, totlen; 401 { 402 struct mbuf *m, *m0, *newm; 403 int len; 404 405 MGETHDR(m0, M_DONTWAIT, MT_DATA); 406 if (m0 == 0) 407 return (0); 408 m0->m_pkthdr.rcvif = &sc->sc_ethercom.ec_if; 409 m0->m_pkthdr.len = totlen; 410 len = MHLEN; 411 m = m0; 412 413 while (totlen > 0) { 414 if (totlen >= MINCLSIZE) { 415 MCLGET(m, M_DONTWAIT); 416 if ((m->m_flags & M_EXT) == 0) 417 goto bad; 418 len = MCLBYTES; 419 } 420 421 if (m == m0) { 422 caddr_t newdata = (caddr_t) 423 ALIGN(m->m_data + sizeof(struct ether_header)) - 424 sizeof(struct ether_header); 425 len -= newdata - m->m_data; 426 m->m_data = newdata; 427 } 428 429 m->m_len = len = min(totlen, len); 430 (*sc->sc_copyfrombuf)(sc, mtod(m, caddr_t), boff, len); 431 boff += len; 432 433 totlen -= len; 434 if (totlen > 0) { 435 MGET(newm, M_DONTWAIT, MT_DATA); 436 if (newm == 0) 437 goto bad; 438 len = MLEN; 439 m = m->m_next = newm; 440 } 441 } 442 443 return (m0); 444 445 bad: 446 m_freem(m0); 447 return (0); 448 } 449 450 /* 451 * Pass a packet to the higher levels. 452 */ 453 void 454 lance_read(sc, boff, len) 455 struct lance_softc *sc; 456 int boff, len; 457 { 458 struct mbuf *m; 459 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 460 struct ether_header *eh; 461 462 if (len <= sizeof(struct ether_header) || 463 len > ((sc->sc_ethercom.ec_capenable & ETHERCAP_VLAN_MTU) ? 464 ETHER_VLAN_ENCAP_LEN + ETHERMTU + sizeof(struct ether_header) : 465 ETHERMTU + sizeof(struct ether_header))) { 466 #ifdef LEDEBUG 467 printf("%s: invalid packet size %d; dropping\n", 468 sc->sc_dev.dv_xname, len); 469 #endif 470 ifp->if_ierrors++; 471 return; 472 } 473 474 /* Pull packet off interface. */ 475 m = lance_get(sc, boff, len); 476 if (m == 0) { 477 ifp->if_ierrors++; 478 return; 479 } 480 481 ifp->if_ipackets++; 482 483 eh = mtod(m, struct ether_header *); 484 485 #ifdef LANCE_REVC_BUG 486 /* 487 * The old LANCE (Rev. C) chips have a bug which causes 488 * garbage to be inserted in front of the received packet. 489 * The work-around is to ignore packets with an invalid 490 * destination address (garbage will usually not match). 491 * Of course, this precludes multicast support... 492 */ 493 if (ETHER_CMP(eh->ether_dhost, sc->sc_enaddr) && 494 ETHER_CMP(eh->ether_dhost, bcast_enaddr)) { 495 m_freem(m); 496 return; 497 } 498 #endif 499 500 /* 501 * Some lance device does not present IFF_SIMPLEX behavior on multicast 502 * packets. Make sure to drop it if it is from ourselves. 503 */ 504 if (!ETHER_CMP(eh->ether_shost, sc->sc_enaddr)) { 505 m_freem(m); 506 return; 507 } 508 509 #if NBPFILTER > 0 510 /* 511 * Check if there's a BPF listener on this interface. 512 * If so, hand off the raw packet to BPF. 513 */ 514 if (ifp->if_bpf) 515 bpf_mtap(ifp->if_bpf, m); 516 #endif 517 518 /* Pass the packet up. */ 519 (*ifp->if_input)(ifp, m); 520 } 521 522 #undef ifp 523 524 void 525 lance_watchdog(ifp) 526 struct ifnet *ifp; 527 { 528 struct lance_softc *sc = ifp->if_softc; 529 530 log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname); 531 ++ifp->if_oerrors; 532 533 lance_reset(sc); 534 } 535 536 int 537 lance_mediachange(ifp) 538 struct ifnet *ifp; 539 { 540 struct lance_softc *sc = ifp->if_softc; 541 542 if (sc->sc_mediachange) 543 return ((*sc->sc_mediachange)(sc)); 544 return (0); 545 } 546 547 void 548 lance_mediastatus(ifp, ifmr) 549 struct ifnet *ifp; 550 struct ifmediareq *ifmr; 551 { 552 struct lance_softc *sc = ifp->if_softc; 553 554 if ((ifp->if_flags & IFF_UP) == 0) 555 return; 556 557 ifmr->ifm_status = IFM_AVALID; 558 if (sc->sc_havecarrier) 559 ifmr->ifm_status |= IFM_ACTIVE; 560 561 if (sc->sc_mediastatus) 562 (*sc->sc_mediastatus)(sc, ifmr); 563 } 564 565 /* 566 * Process an ioctl request. 567 */ 568 int 569 lance_ioctl(ifp, cmd, data) 570 struct ifnet *ifp; 571 u_long cmd; 572 caddr_t data; 573 { 574 struct lance_softc *sc = ifp->if_softc; 575 struct ifreq *ifr = (struct ifreq *)data; 576 int s, error = 0; 577 578 s = splnet(); 579 580 switch (cmd) { 581 582 case SIOCSIFADDR: 583 case SIOCSIFFLAGS: 584 error = ether_ioctl(ifp, cmd, data); 585 break; 586 587 #if defined(CCITT) && defined(LLC) 588 case SIOCSIFCONF_X25: 589 { 590 struct ifaddr *ifa = (struct ifaddr *) data; 591 592 ifp->if_flags |= IFF_UP; 593 ifa->ifa_rtrequest = cons_rtrequest; /* XXX */ 594 error = x25_llcglue(PRC_IFUP, ifa->ifa_addr); 595 if (error == 0) 596 lance_init(&sc->sc_ethercom.ec_if); 597 break; 598 } 599 #endif /* CCITT && LLC */ 600 601 case SIOCADDMULTI: 602 case SIOCDELMULTI: 603 error = (cmd == SIOCADDMULTI) ? 604 ether_addmulti(ifr, &sc->sc_ethercom) : 605 ether_delmulti(ifr, &sc->sc_ethercom); 606 607 if (error == ENETRESET) { 608 /* 609 * Multicast list has changed; set the hardware filter 610 * accordingly. 611 */ 612 if (ifp->if_flags & IFF_RUNNING) 613 lance_reset(sc); 614 error = 0; 615 } 616 break; 617 618 case SIOCGIFMEDIA: 619 case SIOCSIFMEDIA: 620 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 621 break; 622 623 default: 624 error = EINVAL; 625 break; 626 } 627 628 splx(s); 629 return (error); 630 } 631 632 hide void 633 lance_shutdown(arg) 634 void *arg; 635 { 636 637 lance_stop((struct ifnet *)arg, 0); 638 } 639 640 /* 641 * Set up the logical address filter. 642 */ 643 void 644 lance_setladrf(ac, af) 645 struct ethercom *ac; 646 u_int16_t *af; 647 { 648 struct ifnet *ifp = &ac->ec_if; 649 struct ether_multi *enm; 650 u_int32_t crc; 651 struct ether_multistep step; 652 653 /* 654 * Set up multicast address filter by passing all multicast addresses 655 * through a crc generator, and then using the high order 6 bits as an 656 * index into the 64 bit logical address filter. The high order bit 657 * selects the word, while the rest of the bits select the bit within 658 * the word. 659 */ 660 661 if (ifp->if_flags & IFF_PROMISC) 662 goto allmulti; 663 664 af[0] = af[1] = af[2] = af[3] = 0x0000; 665 ETHER_FIRST_MULTI(step, ac, enm); 666 while (enm != NULL) { 667 if (ETHER_CMP(enm->enm_addrlo, enm->enm_addrhi)) { 668 /* 669 * We must listen to a range of multicast addresses. 670 * For now, just accept all multicasts, rather than 671 * trying to set only those filter bits needed to match 672 * the range. (At this time, the only use of address 673 * ranges is for IP multicast routing, for which the 674 * range is big enough to require all bits set.) 675 */ 676 goto allmulti; 677 } 678 679 crc = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN); 680 681 /* Just want the 6 most significant bits. */ 682 crc >>= 26; 683 684 /* Set the corresponding bit in the filter. */ 685 af[crc >> 4] |= 1 << (crc & 0xf); 686 687 ETHER_NEXT_MULTI(step, enm); 688 } 689 ifp->if_flags &= ~IFF_ALLMULTI; 690 return; 691 692 allmulti: 693 ifp->if_flags |= IFF_ALLMULTI; 694 af[0] = af[1] = af[2] = af[3] = 0xffff; 695 } 696 697 /* 698 * Routines for accessing the transmit and receive buffers. 699 * The various CPU and adapter configurations supported by this 700 * driver require three different access methods for buffers 701 * and descriptors: 702 * (1) contig (contiguous data; no padding), 703 * (2) gap2 (two bytes of data followed by two bytes of padding), 704 * (3) gap16 (16 bytes of data followed by 16 bytes of padding). 705 */ 706 707 /* 708 * contig: contiguous data with no padding. 709 * 710 * Buffers may have any alignment. 711 */ 712 713 void 714 lance_copytobuf_contig(sc, from, boff, len) 715 struct lance_softc *sc; 716 void *from; 717 int boff, len; 718 { 719 volatile caddr_t buf = sc->sc_mem; 720 721 /* 722 * Just call memcpy() to do the work. 723 */ 724 memcpy(buf + boff, from, len); 725 } 726 727 void 728 lance_copyfrombuf_contig(sc, to, boff, len) 729 struct lance_softc *sc; 730 void *to; 731 int boff, len; 732 { 733 volatile caddr_t buf = sc->sc_mem; 734 735 /* 736 * Just call memcpy() to do the work. 737 */ 738 memcpy(to, buf + boff, len); 739 } 740 741 void 742 lance_zerobuf_contig(sc, boff, len) 743 struct lance_softc *sc; 744 int boff, len; 745 { 746 volatile caddr_t buf = sc->sc_mem; 747 748 /* 749 * Just let memset() do the work 750 */ 751 memset(buf + boff, 0, len); 752 } 753 754 #if 0 755 /* 756 * Examples only; duplicate these and tweak (if necessary) in 757 * machine-specific front-ends. 758 */ 759 760 /* 761 * gap2: two bytes of data followed by two bytes of pad. 762 * 763 * Buffers must be 4-byte aligned. The code doesn't worry about 764 * doing an extra byte. 765 */ 766 767 void 768 lance_copytobuf_gap2(sc, fromv, boff, len) 769 struct lance_softc *sc; 770 void *fromv; 771 int boff; 772 int len; 773 { 774 volatile caddr_t buf = sc->sc_mem; 775 caddr_t from = fromv; 776 volatile u_int16_t *bptr; 777 778 if (boff & 0x1) { 779 /* handle unaligned first byte */ 780 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 781 *bptr = (*from++ << 8) | (*bptr & 0xff); 782 bptr += 2; 783 len--; 784 } else 785 bptr = ((volatile u_int16_t *)buf) + boff; 786 while (len > 1) { 787 *bptr = (from[1] << 8) | (from[0] & 0xff); 788 bptr += 2; 789 from += 2; 790 len -= 2; 791 } 792 if (len == 1) 793 *bptr = (u_int16_t)*from; 794 } 795 796 void 797 lance_copyfrombuf_gap2(sc, tov, boff, len) 798 struct lance_softc *sc; 799 void *tov; 800 int boff, len; 801 { 802 volatile caddr_t buf = sc->sc_mem; 803 caddr_t to = tov; 804 volatile u_int16_t *bptr; 805 u_int16_t tmp; 806 807 if (boff & 0x1) { 808 /* handle unaligned first byte */ 809 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 810 *to++ = (*bptr >> 8) & 0xff; 811 bptr += 2; 812 len--; 813 } else 814 bptr = ((volatile u_int16_t *)buf) + boff; 815 while (len > 1) { 816 tmp = *bptr; 817 *to++ = tmp & 0xff; 818 *to++ = (tmp >> 8) & 0xff; 819 bptr += 2; 820 len -= 2; 821 } 822 if (len == 1) 823 *to = *bptr & 0xff; 824 } 825 826 void 827 lance_zerobuf_gap2(sc, boff, len) 828 struct lance_softc *sc; 829 int boff, len; 830 { 831 volatile caddr_t buf = sc->sc_mem; 832 volatile u_int16_t *bptr; 833 834 if ((unsigned)boff & 0x1) { 835 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 836 *bptr &= 0xff; 837 bptr += 2; 838 len--; 839 } else 840 bptr = ((volatile u_int16_t *)buf) + boff; 841 while (len > 0) { 842 *bptr = 0; 843 bptr += 2; 844 len -= 2; 845 } 846 } 847 848 /* 849 * gap16: 16 bytes of data followed by 16 bytes of pad. 850 * 851 * Buffers must be 32-byte aligned. 852 */ 853 854 void 855 lance_copytobuf_gap16(sc, fromv, boff, len) 856 struct lance_softc *sc; 857 void *fromv; 858 int boff; 859 int len; 860 { 861 volatile caddr_t buf = sc->sc_mem; 862 caddr_t from = fromv; 863 caddr_t bptr; 864 int xfer; 865 866 bptr = buf + ((boff << 1) & ~0x1f); 867 boff &= 0xf; 868 xfer = min(len, 16 - boff); 869 while (len > 0) { 870 memcpy(bptr + boff, from, xfer); 871 from += xfer; 872 bptr += 32; 873 boff = 0; 874 len -= xfer; 875 xfer = min(len, 16); 876 } 877 } 878 879 void 880 lance_copyfrombuf_gap16(sc, tov, boff, len) 881 struct lance_softc *sc; 882 void *tov; 883 int boff, len; 884 { 885 volatile caddr_t buf = sc->sc_mem; 886 caddr_t to = tov; 887 caddr_t bptr; 888 int xfer; 889 890 bptr = buf + ((boff << 1) & ~0x1f); 891 boff &= 0xf; 892 xfer = min(len, 16 - boff); 893 while (len > 0) { 894 memcpy(to, bptr + boff, xfer); 895 to += xfer; 896 bptr += 32; 897 boff = 0; 898 len -= xfer; 899 xfer = min(len, 16); 900 } 901 } 902 903 void 904 lance_zerobuf_gap16(sc, boff, len) 905 struct lance_softc *sc; 906 int boff, len; 907 { 908 volatile caddr_t buf = sc->sc_mem; 909 caddr_t bptr; 910 int xfer; 911 912 bptr = buf + ((boff << 1) & ~0x1f); 913 boff &= 0xf; 914 xfer = min(len, 16 - boff); 915 while (len > 0) { 916 memset(bptr + boff, 0, xfer); 917 bptr += 32; 918 boff = 0; 919 len -= xfer; 920 xfer = min(len, 16); 921 } 922 } 923 #endif /* Example only */ 924
Indexes created Tue Sep 23 02:09:52 GMT 2025