lance.c revision 1.24
1 /* $NetBSD: lance.c,v 1.24 2001/07/07 15:59:37 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. 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_ccitt.h" 79 #include "opt_llc.h" 80 #include "bpfilter.h" 81 #include "rnd.h" 82 83 #include <sys/param.h> 84 #include <sys/systm.h> 85 #include <sys/mbuf.h> 86 #include <sys/syslog.h> 87 #include <sys/socket.h> 88 #include <sys/device.h> 89 #include <sys/malloc.h> 90 #include <sys/ioctl.h> 91 #include <sys/errno.h> 92 #if NRND > 0 93 #include <sys/rnd.h> 94 #endif 95 96 #include <net/if.h> 97 #include <net/if_dl.h> 98 #include <net/if_ether.h> 99 #include <net/if_media.h> 100 101 #if defined(CCITT) && defined(LLC) 102 #include <sys/socketvar.h> 103 #include <netccitt/x25.h> 104 #include <netccitt/pk.h> 105 #include <netccitt/pk_var.h> 106 #include <netccitt/pk_extern.h> 107 #endif 108 109 #if NBPFILTER > 0 110 #include <net/bpf.h> 111 #include <net/bpfdesc.h> 112 #endif 113 114 #include <dev/ic/lancereg.h> 115 #include <dev/ic/lancevar.h> 116 117 #if defined(_KERNEL_OPT) 118 #include "opt_ddb.h" 119 #endif 120 121 #ifdef DDB 122 #define integrate 123 #define hide 124 #else 125 #define integrate static __inline 126 #define hide static 127 #endif 128 129 integrate struct mbuf *lance_get __P((struct lance_softc *, int, int)); 130 131 hide void lance_shutdown __P((void *)); 132 133 int lance_mediachange __P((struct ifnet *)); 134 void lance_mediastatus __P((struct ifnet *, struct ifmediareq *)); 135 136 static inline u_int16_t ether_cmp __P((void *, void *)); 137 138 void lance_stop __P((struct ifnet *, int)); 139 int lance_ioctl __P((struct ifnet *, u_long, caddr_t)); 140 void lance_watchdog __P((struct ifnet *)); 141 142 /* 143 * Compare two Ether/802 addresses for equality, inlined and 144 * unrolled for speed. Use this like memcmp(). 145 * 146 * XXX: Add <machine/inlines.h> for stuff like this? 147 * XXX: or maybe add it to libkern.h instead? 148 * 149 * "I'd love to have an inline assembler version of this." 150 * XXX: Who wanted that? mycroft? I wrote one, but this 151 * version in C is as good as hand-coded assembly. -gwr 152 * 153 * Please do NOT tweak this without looking at the actual 154 * assembly code generated before and after your tweaks! 155 */ 156 static inline u_int16_t 157 ether_cmp(one, two) 158 void *one, *two; 159 { 160 u_int16_t *a = (u_short *) one; 161 u_int16_t *b = (u_short *) two; 162 u_int16_t diff; 163 164 #ifdef m68k 165 /* 166 * The post-increment-pointer form produces the best 167 * machine code for m68k. This was carefully tuned 168 * so it compiles to just 8 short (2-byte) op-codes! 169 */ 170 diff = *a++ - *b++; 171 diff |= *a++ - *b++; 172 diff |= *a++ - *b++; 173 #else 174 /* 175 * Most modern CPUs do better with a single expresion. 176 * Note that short-cut evaluation is NOT helpful here, 177 * because it just makes the code longer, not faster! 178 */ 179 diff = (a[0] - b[0]) | (a[1] - b[1]) | (a[2] - b[2]); 180 #endif 181 182 return (diff); 183 } 184 185 #define ETHER_CMP ether_cmp 186 187 #ifdef LANCE_REVC_BUG 188 /* Make sure this is short-aligned, for ether_cmp(). */ 189 static u_int16_t bcast_enaddr[3] = { ~0, ~0, ~0 }; 190 #endif 191 192 void 193 lance_config(sc) 194 struct lance_softc *sc; 195 { 196 int i, nbuf; 197 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 198 199 /* Initialize ifnet structure. */ 200 strcpy(ifp->if_xname, sc->sc_dev.dv_xname); 201 ifp->if_softc = sc; 202 ifp->if_start = sc->sc_start; 203 ifp->if_ioctl = lance_ioctl; 204 ifp->if_watchdog = lance_watchdog; 205 ifp->if_init = lance_init; 206 ifp->if_stop = lance_stop; 207 ifp->if_flags = 208 IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; 209 #ifdef LANCE_REVC_BUG 210 ifp->if_flags &= ~IFF_MULTICAST; 211 #endif 212 IFQ_SET_READY(&ifp->if_snd); 213 214 /* Initialize ifmedia structures. */ 215 ifmedia_init(&sc->sc_media, 0, lance_mediachange, lance_mediastatus); 216 if (sc->sc_supmedia != NULL) { 217 for (i = 0; i < sc->sc_nsupmedia; i++) 218 ifmedia_add(&sc->sc_media, sc->sc_supmedia[i], 219 0, NULL); 220 ifmedia_set(&sc->sc_media, sc->sc_defaultmedia); 221 } else { 222 ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); 223 ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); 224 } 225 226 switch (sc->sc_memsize) { 227 case 8192: 228 sc->sc_nrbuf = 4; 229 sc->sc_ntbuf = 1; 230 break; 231 case 16384: 232 sc->sc_nrbuf = 8; 233 sc->sc_ntbuf = 2; 234 break; 235 case 32768: 236 sc->sc_nrbuf = 16; 237 sc->sc_ntbuf = 4; 238 break; 239 case 65536: 240 sc->sc_nrbuf = 32; 241 sc->sc_ntbuf = 8; 242 break; 243 case 131072: 244 sc->sc_nrbuf = 64; 245 sc->sc_ntbuf = 16; 246 break; 247 case 262144: 248 sc->sc_nrbuf = 128; 249 sc->sc_ntbuf = 32; 250 break; 251 default: 252 /* weird memory size; cope with it */ 253 nbuf = sc->sc_memsize / LEBLEN; 254 sc->sc_ntbuf = nbuf / 5; 255 sc->sc_nrbuf = nbuf - sc->sc_ntbuf; 256 } 257 258 printf(": address %s\n", ether_sprintf(sc->sc_enaddr)); 259 printf("%s: %d receive buffers, %d transmit buffers\n", 260 sc->sc_dev.dv_xname, sc->sc_nrbuf, sc->sc_ntbuf); 261 262 /* Make sure the chip is stopped. */ 263 lance_stop(ifp, 0); 264 265 /* claim 802.1q capability */ 266 sc->sc_ethercom.ec_capabilities |= ETHERCAP_VLAN_MTU; 267 /* Attach the interface. */ 268 if_attach(ifp); 269 ether_ifattach(ifp, sc->sc_enaddr); 270 271 sc->sc_sh = shutdownhook_establish(lance_shutdown, ifp); 272 if (sc->sc_sh == NULL) 273 panic("lance_config: can't establish shutdownhook"); 274 sc->sc_rbufaddr = malloc(sc->sc_nrbuf * sizeof(int), M_DEVBUF, 275 M_WAITOK); 276 sc->sc_tbufaddr = malloc(sc->sc_ntbuf * sizeof(int), M_DEVBUF, 277 M_WAITOK); 278 279 #if NRND > 0 280 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 281 RND_TYPE_NET, 0); 282 #endif 283 } 284 285 void 286 lance_reset(sc) 287 struct lance_softc *sc; 288 { 289 int s; 290 291 s = splnet(); 292 lance_init(&sc->sc_ethercom.ec_if); 293 splx(s); 294 } 295 296 void 297 lance_stop(ifp, disable) 298 struct ifnet *ifp; 299 int disable; 300 { 301 struct lance_softc *sc = ifp->if_softc; 302 303 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP); 304 } 305 306 /* 307 * Initialization of interface; set up initialization block 308 * and transmit/receive descriptor rings. 309 */ 310 int 311 lance_init(ifp) 312 struct ifnet *ifp; 313 { 314 struct lance_softc *sc = ifp->if_softc; 315 int timo; 316 u_long a; 317 318 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP); 319 DELAY(100); 320 321 /* Newer LANCE chips have a reset register */ 322 if (sc->sc_hwreset) 323 (*sc->sc_hwreset)(sc); 324 325 /* Set the correct byte swapping mode, etc. */ 326 (*sc->sc_wrcsr)(sc, LE_CSR3, sc->sc_conf3); 327 328 /* Set up LANCE init block. */ 329 (*sc->sc_meminit)(sc); 330 331 /* Give LANCE the physical address of its init block. */ 332 a = sc->sc_addr + LE_INITADDR(sc); 333 (*sc->sc_wrcsr)(sc, LE_CSR1, a); 334 (*sc->sc_wrcsr)(sc, LE_CSR2, a >> 16); 335 336 /* Try to initialize the LANCE. */ 337 DELAY(100); 338 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INIT); 339 340 /* Wait for initialization to finish. */ 341 for (timo = 100000; timo; timo--) 342 if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON) 343 break; 344 345 if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON) { 346 /* Start the LANCE. */ 347 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_STRT | 348 LE_C0_IDON); 349 ifp->if_flags |= IFF_RUNNING; 350 ifp->if_flags &= ~IFF_OACTIVE; 351 ifp->if_timer = 0; 352 (*sc->sc_start)(ifp); 353 } else 354 printf("%s: controller failed to initialize\n", 355 sc->sc_dev.dv_xname); 356 if (sc->sc_hwinit) 357 (*sc->sc_hwinit)(sc); 358 359 return (0); 360 } 361 362 /* 363 * Routine to copy from mbuf chain to transmit buffer in 364 * network buffer memory. 365 */ 366 int 367 lance_put(sc, boff, m) 368 struct lance_softc *sc; 369 int boff; 370 struct mbuf *m; 371 { 372 struct mbuf *n; 373 int len, tlen = 0; 374 375 for (; m; m = n) { 376 len = m->m_len; 377 if (len == 0) { 378 MFREE(m, n); 379 continue; 380 } 381 (*sc->sc_copytobuf)(sc, mtod(m, caddr_t), boff, len); 382 boff += len; 383 tlen += len; 384 MFREE(m, n); 385 } 386 if (tlen < LEMINSIZE) { 387 (*sc->sc_zerobuf)(sc, boff, LEMINSIZE - tlen); 388 tlen = LEMINSIZE; 389 } 390 return (tlen); 391 } 392 393 /* 394 * Pull data off an interface. 395 * Len is length of data, with local net header stripped. 396 * We copy the data into mbufs. When full cluster sized units are present 397 * we copy into clusters. 398 */ 399 integrate struct mbuf * 400 lance_get(sc, boff, totlen) 401 struct lance_softc *sc; 402 int boff, totlen; 403 { 404 struct mbuf *m, *m0, *newm; 405 int len; 406 407 MGETHDR(m0, M_DONTWAIT, MT_DATA); 408 if (m0 == 0) 409 return (0); 410 m0->m_pkthdr.rcvif = &sc->sc_ethercom.ec_if; 411 m0->m_pkthdr.len = totlen; 412 len = MHLEN; 413 m = m0; 414 415 while (totlen > 0) { 416 if (totlen >= MINCLSIZE) { 417 MCLGET(m, M_DONTWAIT); 418 if ((m->m_flags & M_EXT) == 0) 419 goto bad; 420 len = MCLBYTES; 421 } 422 423 if (m == m0) { 424 caddr_t newdata = (caddr_t) 425 ALIGN(m->m_data + sizeof(struct ether_header)) - 426 sizeof(struct ether_header); 427 len -= newdata - m->m_data; 428 m->m_data = newdata; 429 } 430 431 m->m_len = len = min(totlen, len); 432 (*sc->sc_copyfrombuf)(sc, mtod(m, caddr_t), boff, len); 433 boff += len; 434 435 totlen -= len; 436 if (totlen > 0) { 437 MGET(newm, M_DONTWAIT, MT_DATA); 438 if (newm == 0) 439 goto bad; 440 len = MLEN; 441 m = m->m_next = newm; 442 } 443 } 444 445 return (m0); 446 447 bad: 448 m_freem(m0); 449 return (0); 450 } 451 452 /* 453 * Pass a packet to the higher levels. 454 */ 455 void 456 lance_read(sc, boff, len) 457 struct lance_softc *sc; 458 int boff, len; 459 { 460 struct mbuf *m; 461 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 462 #ifdef LANCE_REVC_BUG 463 struct ether_header *eh; 464 #endif 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 #if NBPFILTER > 0 488 /* 489 * Check if there's a BPF listener on this interface. 490 * If so, hand off the raw packet to BPF. 491 */ 492 if (ifp->if_bpf) 493 bpf_mtap(ifp->if_bpf, m); 494 #endif 495 496 #ifdef LANCE_REVC_BUG 497 /* 498 * The old LANCE (Rev. C) chips have a bug which causes 499 * garbage to be inserted in front of the received packet. 500 * The work-around is to ignore packets with an invalid 501 * destination address (garbage will usually not match). 502 * Of course, this precludes multicast support... 503 */ 504 eh = mtod(m, struct ether_header *); 505 if (ETHER_CMP(eh->ether_dhost, sc->sc_enaddr) && 506 ETHER_CMP(eh->ether_dhost, bcast_enaddr)) { 507 m_freem(m); 508 return; 509 } 510 #endif 511 512 /* Pass the packet up. */ 513 (*ifp->if_input)(ifp, m); 514 } 515 516 #undef ifp 517 518 void 519 lance_watchdog(ifp) 520 struct ifnet *ifp; 521 { 522 struct lance_softc *sc = ifp->if_softc; 523 524 log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname); 525 ++ifp->if_oerrors; 526 527 lance_reset(sc); 528 } 529 530 int 531 lance_mediachange(ifp) 532 struct ifnet *ifp; 533 { 534 struct lance_softc *sc = ifp->if_softc; 535 536 if (sc->sc_mediachange) 537 return ((*sc->sc_mediachange)(sc)); 538 return (0); 539 } 540 541 void 542 lance_mediastatus(ifp, ifmr) 543 struct ifnet *ifp; 544 struct ifmediareq *ifmr; 545 { 546 struct lance_softc *sc = ifp->if_softc; 547 548 if ((ifp->if_flags & IFF_UP) == 0) 549 return; 550 551 ifmr->ifm_status = IFM_AVALID; 552 if (sc->sc_havecarrier) 553 ifmr->ifm_status |= IFM_ACTIVE; 554 555 if (sc->sc_mediastatus) 556 (*sc->sc_mediastatus)(sc, ifmr); 557 } 558 559 /* 560 * Process an ioctl request. 561 */ 562 int 563 lance_ioctl(ifp, cmd, data) 564 struct ifnet *ifp; 565 u_long cmd; 566 caddr_t data; 567 { 568 struct lance_softc *sc = ifp->if_softc; 569 struct ifreq *ifr = (struct ifreq *)data; 570 int s, error = 0; 571 572 s = splnet(); 573 574 switch (cmd) { 575 576 case SIOCSIFADDR: 577 case SIOCSIFFLAGS: 578 error = ether_ioctl(ifp, cmd, data); 579 break; 580 581 #if defined(CCITT) && defined(LLC) 582 case SIOCSIFCONF_X25: 583 { 584 struct ifaddr *ifa = (struct ifaddr *) data; 585 586 ifp->if_flags |= IFF_UP; 587 ifa->ifa_rtrequest = cons_rtrequest; /* XXX */ 588 error = x25_llcglue(PRC_IFUP, ifa->ifa_addr); 589 if (error == 0) 590 lance_init(&sc->sc_ethercom.ec_if); 591 break; 592 } 593 #endif /* CCITT && LLC */ 594 595 case SIOCADDMULTI: 596 case SIOCDELMULTI: 597 error = (cmd == SIOCADDMULTI) ? 598 ether_addmulti(ifr, &sc->sc_ethercom) : 599 ether_delmulti(ifr, &sc->sc_ethercom); 600 601 if (error == ENETRESET) { 602 /* 603 * Multicast list has changed; set the hardware filter 604 * accordingly. 605 */ 606 lance_reset(sc); 607 error = 0; 608 } 609 break; 610 611 case SIOCGIFMEDIA: 612 case SIOCSIFMEDIA: 613 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 614 break; 615 616 default: 617 error = EINVAL; 618 break; 619 } 620 621 splx(s); 622 return (error); 623 } 624 625 hide void 626 lance_shutdown(arg) 627 void *arg; 628 { 629 630 lance_stop((struct ifnet *)arg, 0); 631 } 632 633 /* 634 * Set up the logical address filter. 635 */ 636 void 637 lance_setladrf(ac, af) 638 struct ethercom *ac; 639 u_int16_t *af; 640 { 641 struct ifnet *ifp = &ac->ec_if; 642 struct ether_multi *enm; 643 u_int32_t crc; 644 struct ether_multistep step; 645 646 /* 647 * Set up multicast address filter by passing all multicast addresses 648 * through a crc generator, and then using the high order 6 bits as an 649 * index into the 64 bit logical address filter. The high order bit 650 * selects the word, while the rest of the bits select the bit within 651 * the word. 652 */ 653 654 if (ifp->if_flags & IFF_PROMISC) 655 goto allmulti; 656 657 af[0] = af[1] = af[2] = af[3] = 0x0000; 658 ETHER_FIRST_MULTI(step, ac, enm); 659 while (enm != NULL) { 660 if (ETHER_CMP(enm->enm_addrlo, enm->enm_addrhi)) { 661 /* 662 * We must listen to a range of multicast addresses. 663 * For now, just accept all multicasts, rather than 664 * trying to set only those filter bits needed to match 665 * the range. (At this time, the only use of address 666 * ranges is for IP multicast routing, for which the 667 * range is big enough to require all bits set.) 668 */ 669 goto allmulti; 670 } 671 672 crc = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN); 673 674 /* Just want the 6 most significant bits. */ 675 crc >>= 26; 676 677 /* Set the corresponding bit in the filter. */ 678 af[crc >> 4] |= 1 << (crc & 0xf); 679 680 ETHER_NEXT_MULTI(step, enm); 681 } 682 ifp->if_flags &= ~IFF_ALLMULTI; 683 return; 684 685 allmulti: 686 ifp->if_flags |= IFF_ALLMULTI; 687 af[0] = af[1] = af[2] = af[3] = 0xffff; 688 } 689 690 /* 691 * Routines for accessing the transmit and receive buffers. 692 * The various CPU and adapter configurations supported by this 693 * driver require three different access methods for buffers 694 * and descriptors: 695 * (1) contig (contiguous data; no padding), 696 * (2) gap2 (two bytes of data followed by two bytes of padding), 697 * (3) gap16 (16 bytes of data followed by 16 bytes of padding). 698 */ 699 700 /* 701 * contig: contiguous data with no padding. 702 * 703 * Buffers may have any alignment. 704 */ 705 706 void 707 lance_copytobuf_contig(sc, from, boff, len) 708 struct lance_softc *sc; 709 void *from; 710 int boff, len; 711 { 712 volatile caddr_t buf = sc->sc_mem; 713 714 /* 715 * Just call memcpy() to do the work. 716 */ 717 memcpy(buf + boff, from, len); 718 } 719 720 void 721 lance_copyfrombuf_contig(sc, to, boff, len) 722 struct lance_softc *sc; 723 void *to; 724 int boff, len; 725 { 726 volatile caddr_t buf = sc->sc_mem; 727 728 /* 729 * Just call memcpy() to do the work. 730 */ 731 memcpy(to, buf + boff, len); 732 } 733 734 void 735 lance_zerobuf_contig(sc, boff, len) 736 struct lance_softc *sc; 737 int boff, len; 738 { 739 volatile caddr_t buf = sc->sc_mem; 740 741 /* 742 * Just let bzero() do the work 743 */ 744 bzero(buf + boff, len); 745 } 746 747 #if 0 748 /* 749 * Examples only; duplicate these and tweak (if necessary) in 750 * machine-specific front-ends. 751 */ 752 753 /* 754 * gap2: two bytes of data followed by two bytes of pad. 755 * 756 * Buffers must be 4-byte aligned. The code doesn't worry about 757 * doing an extra byte. 758 */ 759 760 void 761 lance_copytobuf_gap2(sc, fromv, boff, len) 762 struct lance_softc *sc; 763 void *fromv; 764 int boff; 765 int len; 766 { 767 volatile caddr_t buf = sc->sc_mem; 768 caddr_t from = fromv; 769 volatile u_int16_t *bptr; 770 771 if (boff & 0x1) { 772 /* handle unaligned first byte */ 773 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 774 *bptr = (*from++ << 8) | (*bptr & 0xff); 775 bptr += 2; 776 len--; 777 } else 778 bptr = ((volatile u_int16_t *)buf) + boff; 779 while (len > 1) { 780 *bptr = (from[1] << 8) | (from[0] & 0xff); 781 bptr += 2; 782 from += 2; 783 len -= 2; 784 } 785 if (len == 1) 786 *bptr = (u_int16_t)*from; 787 } 788 789 void 790 lance_copyfrombuf_gap2(sc, tov, boff, len) 791 struct lance_softc *sc; 792 void *tov; 793 int boff, len; 794 { 795 volatile caddr_t buf = sc->sc_mem; 796 caddr_t to = tov; 797 volatile u_int16_t *bptr; 798 u_int16_t tmp; 799 800 if (boff & 0x1) { 801 /* handle unaligned first byte */ 802 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 803 *to++ = (*bptr >> 8) & 0xff; 804 bptr += 2; 805 len--; 806 } else 807 bptr = ((volatile u_int16_t *)buf) + boff; 808 while (len > 1) { 809 tmp = *bptr; 810 *to++ = tmp & 0xff; 811 *to++ = (tmp >> 8) & 0xff; 812 bptr += 2; 813 len -= 2; 814 } 815 if (len == 1) 816 *to = *bptr & 0xff; 817 } 818 819 void 820 lance_zerobuf_gap2(sc, boff, len) 821 struct lance_softc *sc; 822 int boff, len; 823 { 824 volatile caddr_t buf = sc->sc_mem; 825 volatile u_int16_t *bptr; 826 827 if ((unsigned)boff & 0x1) { 828 bptr = ((volatile u_int16_t *)buf) + (boff - 1); 829 *bptr &= 0xff; 830 bptr += 2; 831 len--; 832 } else 833 bptr = ((volatile u_int16_t *)buf) + boff; 834 while (len > 0) { 835 *bptr = 0; 836 bptr += 2; 837 len -= 2; 838 } 839 } 840 841 /* 842 * gap16: 16 bytes of data followed by 16 bytes of pad. 843 * 844 * Buffers must be 32-byte aligned. 845 */ 846 847 void 848 lance_copytobuf_gap16(sc, fromv, boff, len) 849 struct lance_softc *sc; 850 void *fromv; 851 int boff; 852 int len; 853 { 854 volatile caddr_t buf = sc->sc_mem; 855 caddr_t from = fromv; 856 caddr_t bptr; 857 int xfer; 858 859 bptr = buf + ((boff << 1) & ~0x1f); 860 boff &= 0xf; 861 xfer = min(len, 16 - boff); 862 while (len > 0) { 863 memcpy(bptr + boff, from, xfer); 864 from += xfer; 865 bptr += 32; 866 boff = 0; 867 len -= xfer; 868 xfer = min(len, 16); 869 } 870 } 871 872 void 873 lance_copyfrombuf_gap16(sc, tov, boff, len) 874 struct lance_softc *sc; 875 void *tov; 876 int boff, len; 877 { 878 volatile caddr_t buf = sc->sc_mem; 879 caddr_t to = tov; 880 caddr_t bptr; 881 int xfer; 882 883 bptr = buf + ((boff << 1) & ~0x1f); 884 boff &= 0xf; 885 xfer = min(len, 16 - boff); 886 while (len > 0) { 887 memcpy(to, bptr + boff, xfer); 888 to += xfer; 889 bptr += 32; 890 boff = 0; 891 len -= xfer; 892 xfer = min(len, 16); 893 } 894 } 895 896 void 897 lance_zerobuf_gap16(sc, boff, len) 898 struct lance_softc *sc; 899 int boff, len; 900 { 901 volatile caddr_t buf = sc->sc_mem; 902 caddr_t bptr; 903 int xfer; 904 905 bptr = buf + ((boff << 1) & ~0x1f); 906 boff &= 0xf; 907 xfer = min(len, 16 - boff); 908 while (len > 0) { 909 bzero(bptr + boff, xfer); 910 bptr += 32; 911 boff = 0; 912 len -= xfer; 913 xfer = min(len, 16); 914 } 915 } 916 #endif /* Example only */ 917
Indexes created Mon Sep 22 13:09:51 GMT 2025