lance.c revision 1.26
1 /* $NetBSD: lance.c,v 1.26 2001/11/13 13:14:40 lukem 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 1.26 2001/11/13 13:14:40 lukem 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 LE_C0_IDON); 352 ifp->if_flags |= IFF_RUNNING; 353 ifp->if_flags &= ~IFF_OACTIVE; 354 ifp->if_timer = 0; 355 (*sc->sc_start)(ifp); 356 } else 357 printf("%s: controller failed to initialize\n", 358 sc->sc_dev.dv_xname); 359 if (sc->sc_hwinit) 360 (*sc->sc_hwinit)(sc); 361 362 return (0); 363 } 364 365 /* 366 * Routine to copy from mbuf chain to transmit buffer in 367 * network buffer memory. 368 */ 369 int 370 lance_put(sc, boff, m) 371 struct lance_softc *sc; 372 int boff; 373 struct mbuf *m; 374 { 375 struct mbuf *n; 376 int len, tlen = 0; 377 378 for (; m; m = n) { 379 len = m->m_len; 380 if (len == 0) { 381 MFREE(m, n); 382 continue; 383 } 384 (*sc->sc_copytobuf)(sc, mtod(m, caddr_t), boff, len); 385 boff += len; 386 tlen += len; 387 MFREE(m, n); 388 } 389 if (tlen < LEMINSIZE) { 390 (*sc->sc_zerobuf)(sc, boff, LEMINSIZE - tlen); 391 tlen = LEMINSIZE; 392 } 393 return (tlen); 394 } 395 396 /* 397 * Pull data off an interface. 398 * Len is length of data, with local net header stripped. 399 * We copy the data into mbufs. When full cluster sized units are present 400 * we copy into clusters. 401 */ 402 integrate struct mbuf * 403 lance_get(sc, boff, totlen) 404 struct lance_softc *sc; 405 int boff, totlen; 406 { 407 struct mbuf *m, *m0, *newm; 408 int len; 409 410 MGETHDR(m0, M_DONTWAIT, MT_DATA); 411 if (m0 == 0) 412 return (0); 413 m0->m_pkthdr.rcvif = &sc->sc_ethercom.ec_if; 414 m0->m_pkthdr.len = totlen; 415 len = MHLEN; 416 m = m0; 417 418 while (totlen > 0) { 419 if (totlen >= MINCLSIZE) { 420 MCLGET(m, M_DONTWAIT); 421 if ((m->m_flags & M_EXT) == 0) 422 goto bad; 423 len = MCLBYTES; 424 } 425 426 if (m == m0) { 427 caddr_t newdata = (caddr_t) 428 ALIGN(m->m_data + sizeof(struct ether_header)) - 429 sizeof(struct ether_header); 430 len -= newdata - m->m_data; 431 m->m_data = newdata; 432 } 433 434 m->m_len = len = min(totlen, len); 435 (*sc->sc_copyfrombuf)(sc, mtod(m, caddr_t), boff, len); 436 boff += len; 437 438 totlen -= len; 439 if (totlen > 0) { 440 MGET(newm, M_DONTWAIT, MT_DATA); 441 if (newm == 0) 442 goto bad; 443 len = MLEN; 444 m = m->m_next = newm; 445 } 446 } 447 448 return (m0); 449 450 bad: 451 m_freem(m0); 452 return (0); 453 } 454 455 /* 456 * Pass a packet to the higher levels. 457 */ 458 void 459 lance_read(sc, boff, len) 460 struct lance_softc *sc; 461 int boff, len; 462 { 463 struct mbuf *m; 464 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 465 #ifdef LANCE_REVC_BUG 466 struct ether_header *eh; 467 #endif 468 469 if (len <= sizeof(struct ether_header) || 470 len > ((sc->sc_ethercom.ec_capenable & ETHERCAP_VLAN_MTU) ? 471 ETHER_VLAN_ENCAP_LEN + ETHERMTU + sizeof(struct ether_header) : 472 ETHERMTU + sizeof(struct ether_header))) { 473 #ifdef LEDEBUG 474 printf("%s: invalid packet size %d; dropping\n", 475 sc->sc_dev.dv_xname, len); 476 #endif 477 ifp->if_ierrors++; 478 return; 479 } 480 481 /* Pull packet off interface. */ 482 m = lance_get(sc, boff, len); 483 if (m == 0) { 484 ifp->if_ierrors++; 485 return; 486 } 487 488 ifp->if_ipackets++; 489 490 #if NBPFILTER > 0 491 /* 492 * Check if there's a BPF listener on this interface. 493 * If so, hand off the raw packet to BPF. 494 */ 495 if (ifp->if_bpf) 496 bpf_mtap(ifp->if_bpf, m); 497 #endif 498 499 #ifdef LANCE_REVC_BUG 500 /* 501 * The old LANCE (Rev. C) chips have a bug which causes 502 * garbage to be inserted in front of the received packet. 503 * The work-around is to ignore packets with an invalid 504 * destination address (garbage will usually not match). 505 * Of course, this precludes multicast support... 506 */ 507 eh = mtod(m, struct ether_header *); 508 if (ETHER_CMP(eh->ether_dhost, sc->sc_enaddr) && 509 ETHER_CMP(eh->ether_dhost, bcast_enaddr)) { 510 m_freem(m); 511 return; 512 } 513 #endif 514 515 /* Pass the packet up. */ 516 (*ifp->if_input)(ifp, m); 517 } 518 519 #undef ifp 520 521 void 522 lance_watchdog(ifp) 523 struct ifnet *ifp; 524 { 525 struct lance_softc *sc = ifp->if_softc; 526 527 log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname); 528 ++ifp->if_oerrors; 529 530 lance_reset(sc); 531 } 532 533 int 534 lance_mediachange(ifp) 535 struct ifnet *ifp; 536 { 537 struct lance_softc *sc = ifp->if_softc; 538 539 if (sc->sc_mediachange) 540 return ((*sc->sc_mediachange)(sc)); 541 return (0); 542 } 543 544 void 545 lance_mediastatus(ifp, ifmr) 546 struct ifnet *ifp; 547 struct ifmediareq *ifmr; 548 { 549 struct lance_softc *sc = ifp->if_softc; 550 551 if ((ifp->if_flags & IFF_UP) == 0) 552 return; 553 554 ifmr->ifm_status = IFM_AVALID; 555 if (sc->sc_havecarrier) 556 ifmr->ifm_status |= IFM_ACTIVE; 557 558 if (sc->sc_mediastatus) 559 (*sc->sc_mediastatus)(sc, ifmr); 560 } 561 562 /* 563 * Process an ioctl request. 564 */ 565 int 566 lance_ioctl(ifp, cmd, data) 567 struct ifnet *ifp; 568 u_long cmd; 569 caddr_t data; 570 { 571 struct lance_softc *sc = ifp->if_softc; 572 struct ifreq *ifr = (struct ifreq *)data; 573 int s, error = 0; 574 575 s = splnet(); 576 577 switch (cmd) { 578 579 case SIOCSIFADDR: 580 case SIOCSIFFLAGS: 581 error = ether_ioctl(ifp, cmd, data); 582 break; 583 584 #if defined(CCITT) && defined(LLC) 585 case SIOCSIFCONF_X25: 586 { 587 struct ifaddr *ifa = (struct ifaddr *) data; 588 589 ifp->if_flags |= IFF_UP; 590 ifa->ifa_rtrequest = cons_rtrequest; /* XXX */ 591 error = x25_llcglue(PRC_IFUP, ifa->ifa_addr); 592 if (error == 0) 593 lance_init(&sc->sc_ethercom.ec_if); 594 break; 595 } 596 #endif /* CCITT && LLC */ 597 598 case SIOCADDMULTI: 599 case SIOCDELMULTI: 600 error = (cmd == SIOCADDMULTI) ? 601 ether_addmulti(ifr, &sc->sc_ethercom) : 602 ether_delmulti(ifr, &sc->sc_ethercom); 603 604 if (error == ENETRESET) { 605 /* 606 * Multicast list has changed; set the hardware filter 607 * accordingly. 608 */ 609 lance_reset(sc); 610 error = 0; 611 } 612 break; 613 614 case SIOCGIFMEDIA: 615 case SIOCSIFMEDIA: 616 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 617 break; 618 619 default: 620 error = EINVAL; 621 break; 622 } 623 624 splx(s); 625 return (error); 626 } 627 628 hide void 629 lance_shutdown(arg) 630 void *arg; 631 { 632 633 lance_stop((struct ifnet *)arg, 0); 634 } 635 636 /* 637 * Set up the logical address filter. 638 */ 639 void 640 lance_setladrf(ac, af) 641 struct ethercom *ac; 642 u_int16_t *af; 643 { 644 struct ifnet *ifp = &ac->ec_if; 645 struct ether_multi *enm; 646 u_int32_t crc; 647 struct ether_multistep step; 648 649 /* 650 * Set up multicast address filter by passing all multicast addresses 651 * through a crc generator, and then using the high order 6 bits as an 652 * index into the 64 bit logical address filter. The high order bit 653 * selects the word, while the rest of the bits select the bit within 654 * the word. 655 */ 656 657 if (ifp->if_flags & IFF_PROMISC) 658 goto allmulti; 659 660 af[0] = af[1] = af[2] = af[3] = 0x0000; 661 ETHER_FIRST_MULTI(step, ac, enm); 662 while (enm != NULL) { 663 if (ETHER_CMP(enm->enm_addrlo, enm->enm_addrhi)) { 664 /* 665 * We must listen to a range of multicast addresses. 666 * For now, just accept all multicasts, rather than 667 * trying to set only those filter bits needed to match 668 * the range. (At this time, the only use of address 669 * ranges is for IP multicast routing, for which the 670 * range is big enough to require all bits set.) 671 */ 672 goto allmulti; 673 } 674 675 crc = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN); 676 677 /* Just want the 6 most significant bits. */ 678 crc >>= 26; 679 680 /* Set the corresponding bit in the filter. */ 681 af[crc >> 4] |= 1 << (crc & 0xf); 682 683 ETHER_NEXT_MULTI(step, enm); 684 } 685 ifp->if_flags &= ~IFF_ALLMULTI; 686 return; 687 688 allmulti: 689 ifp->if_flags |= IFF_ALLMULTI; 690 af[0] = af[1] = af[2] = af[3] = 0xffff; 691 } 692 693 /* 694 * Routines for accessing the transmit and receive buffers. 695 * The various CPU and adapter configurations supported by this 696 * driver require three different access methods for buffers 697 * and descriptors: 698 * (1) contig (contiguous data; no padding), 699 * (2) gap2 (two bytes of data followed by two bytes of padding), 700 * (3) gap16 (16 bytes of data followed by 16 bytes of padding). 701 */ 702 703 /* 704 * contig: contiguous data with no padding. 705 * 706 * Buffers may have any alignment. 707 */ 708 709 void 710 lance_copytobuf_contig(sc, from, boff, len) 711 struct lance_softc *sc; 712 void *from; 713 int boff, len; 714 { 715 volatile caddr_t buf = sc->sc_mem; 716 717 /* 718 * Just call memcpy() to do the work. 719 */ 720 memcpy(buf + boff, from, len); 721 } 722 723 void 724 lance_copyfrombuf_contig(sc, to, boff, len) 725 struct lance_softc *sc; 726 void *to; 727 int boff, len; 728 { 729 volatile caddr_t buf = sc->sc_mem; 730 731 /* 732 * Just call memcpy() to do the work. 733 */ 734 memcpy(to, buf + boff, len); 735 } 736 737 void 738 lance_zerobuf_contig(sc, boff, len) 739 struct lance_softc *sc; 740 int boff, len; 741 { 742 volatile caddr_t buf = sc->sc_mem; 743 744 /* 745 * Just let memset() do the work 746 */ 747 memset(buf + boff, 0, len); 748 } 749 750 #if 0 751 /* 752 * Examples only; duplicate these and tweak (if necessary) in 753 * machine-specific front-ends. 754 */ 755 756 /* 757 * gap2: two bytes of data followed by two bytes of pad. 758 * 759 * Buffers must be 4-byte aligned. The code doesn't worry about 760 * doing an extra byte. 761 */ 762 763 void 764 lance_copytobuf_gap2(sc, fromv, boff, len) 765 struct lance_softc *sc; 766 void *fromv; 767 int boff; 768 int len; 769 { 770 volatile caddr_t buf = sc->sc_mem; 771 caddr_t from = fromv; 772 volatile u_int16_t *bptr; 773 774 if (boff & 0x1) { 775 /* handle unaligned first byte */ 776 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 777 *bptr = (*from++ << 8) | (*bptr & 0xff); 778 bptr += 2; 779 len--; 780 } else 781 bptr = ((volatile u_int16_t *)buf) + boff; 782 while (len > 1) { 783 *bptr = (from[1] << 8) | (from[0] & 0xff); 784 bptr += 2; 785 from += 2; 786 len -= 2; 787 } 788 if (len == 1) 789 *bptr = (u_int16_t)*from; 790 } 791 792 void 793 lance_copyfrombuf_gap2(sc, tov, boff, len) 794 struct lance_softc *sc; 795 void *tov; 796 int boff, len; 797 { 798 volatile caddr_t buf = sc->sc_mem; 799 caddr_t to = tov; 800 volatile u_int16_t *bptr; 801 u_int16_t tmp; 802 803 if (boff & 0x1) { 804 /* handle unaligned first byte */ 805 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 806 *to++ = (*bptr >> 8) & 0xff; 807 bptr += 2; 808 len--; 809 } else 810 bptr = ((volatile u_int16_t *)buf) + boff; 811 while (len > 1) { 812 tmp = *bptr; 813 *to++ = tmp & 0xff; 814 *to++ = (tmp >> 8) & 0xff; 815 bptr += 2; 816 len -= 2; 817 } 818 if (len == 1) 819 *to = *bptr & 0xff; 820 } 821 822 void 823 lance_zerobuf_gap2(sc, boff, len) 824 struct lance_softc *sc; 825 int boff, len; 826 { 827 volatile caddr_t buf = sc->sc_mem; 828 volatile u_int16_t *bptr; 829 830 if ((unsigned)boff & 0x1) { 831 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 832 *bptr &= 0xff; 833 bptr += 2; 834 len--; 835 } else 836 bptr = ((volatile u_int16_t *)buf) + boff; 837 while (len > 0) { 838 *bptr = 0; 839 bptr += 2; 840 len -= 2; 841 } 842 } 843 844 /* 845 * gap16: 16 bytes of data followed by 16 bytes of pad. 846 * 847 * Buffers must be 32-byte aligned. 848 */ 849 850 void 851 lance_copytobuf_gap16(sc, fromv, boff, len) 852 struct lance_softc *sc; 853 void *fromv; 854 int boff; 855 int len; 856 { 857 volatile caddr_t buf = sc->sc_mem; 858 caddr_t from = fromv; 859 caddr_t bptr; 860 int xfer; 861 862 bptr = buf + ((boff << 1) & ~0x1f); 863 boff &= 0xf; 864 xfer = min(len, 16 - boff); 865 while (len > 0) { 866 memcpy(bptr + boff, from, xfer); 867 from += xfer; 868 bptr += 32; 869 boff = 0; 870 len -= xfer; 871 xfer = min(len, 16); 872 } 873 } 874 875 void 876 lance_copyfrombuf_gap16(sc, tov, boff, len) 877 struct lance_softc *sc; 878 void *tov; 879 int boff, len; 880 { 881 volatile caddr_t buf = sc->sc_mem; 882 caddr_t to = tov; 883 caddr_t bptr; 884 int xfer; 885 886 bptr = buf + ((boff << 1) & ~0x1f); 887 boff &= 0xf; 888 xfer = min(len, 16 - boff); 889 while (len > 0) { 890 memcpy(to, bptr + boff, xfer); 891 to += xfer; 892 bptr += 32; 893 boff = 0; 894 len -= xfer; 895 xfer = min(len, 16); 896 } 897 } 898 899 void 900 lance_zerobuf_gap16(sc, boff, len) 901 struct lance_softc *sc; 902 int boff, len; 903 { 904 volatile caddr_t buf = sc->sc_mem; 905 caddr_t bptr; 906 int xfer; 907 908 bptr = buf + ((boff << 1) & ~0x1f); 909 boff &= 0xf; 910 xfer = min(len, 16 - boff); 911 while (len > 0) { 912 memset(bptr + boff, 0, xfer); 913 bptr += 32; 914 boff = 0; 915 len -= xfer; 916 xfer = min(len, 16); 917 } 918 } 919 #endif /* Example only */ 920
Indexes created Tue Sep 23 07:09:52 GMT 2025