1 /* $NetBSD: lance.c,v 1.55 2019/02/05 06:17:02 msaitoh 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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /*- 34 * Copyright (c) 1992, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * This code is derived from software contributed to Berkeley by 38 * Ralph Campbell and Rick Macklem. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 1. Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * 2. Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in the 47 * documentation and/or other materials provided with the distribution. 48 * 3. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)if_le.c 8.2 (Berkeley) 11/16/93 65 */ 66 67 #include <sys/cdefs.h> 68 __KERNEL_RCSID(0, "$NetBSD: lance.c,v 1.55 2019/02/05 06:17:02 msaitoh Exp $"); 69 70 #include <sys/param.h> 71 #include <sys/systm.h> 72 #include <sys/mbuf.h> 73 #include <sys/syslog.h> 74 #include <sys/socket.h> 75 #include <sys/device.h> 76 #include <sys/malloc.h> 77 #include <sys/ioctl.h> 78 #include <sys/errno.h> 79 #include <sys/rndsource.h> 80 81 #include <net/if.h> 82 #include <net/if_dl.h> 83 #include <net/if_ether.h> 84 #include <net/if_media.h> 85 #include <net/bpf.h> 86 87 #include <dev/ic/lancereg.h> 88 #include <dev/ic/lancevar.h> 89 90 #if defined(_KERNEL_OPT) 91 #include "opt_ddb.h" 92 #endif 93 94 #ifdef DDB 95 #define integrate 96 #define hide 97 #else 98 #define integrate static inline 99 #define hide static 100 #endif 101 102 integrate struct mbuf *lance_get(struct lance_softc *, int, int); 103 104 hide bool lance_shutdown(device_t, int); 105 106 int lance_mediachange(struct ifnet *); 107 void lance_mediastatus(struct ifnet *, struct ifmediareq *); 108 109 static inline u_int16_t ether_cmp(void *, void *); 110 111 void lance_stop(struct ifnet *, int); 112 int lance_ioctl(struct ifnet *, u_long, void *); 113 void lance_watchdog(struct ifnet *); 114 115 /* 116 * Compare two Ether/802 addresses for equality, inlined and 117 * unrolled for speed. Use this like memcmp(). 118 * 119 * XXX: Add <machine/inlines.h> for stuff like this? 120 * XXX: or maybe add it to libkern.h instead? 121 * 122 * "I'd love to have an inline assembler version of this." 123 * XXX: Who wanted that? mycroft? I wrote one, but this 124 * version in C is as good as hand-coded assembly. -gwr 125 * 126 * Please do NOT tweak this without looking at the actual 127 * assembly code generated before and after your tweaks! 128 */ 129 static inline uint16_t 130 ether_cmp(void *one, void *two) 131 { 132 uint16_t *a = (uint16_t *)one; 133 uint16_t *b = (uint16_t *)two; 134 uint16_t diff; 135 136 #ifdef m68k 137 /* 138 * The post-increment-pointer form produces the best 139 * machine code for m68k. This was carefully tuned 140 * so it compiles to just 8 short (2-byte) op-codes! 141 */ 142 diff = *a++ - *b++; 143 diff |= *a++ - *b++; 144 diff |= *a++ - *b++; 145 #else 146 /* 147 * Most modern CPUs do better with a single expresion. 148 * Note that short-cut evaluation is NOT helpful here, 149 * because it just makes the code longer, not faster! 150 */ 151 diff = (a[0] - b[0]) | (a[1] - b[1]) | (a[2] - b[2]); 152 #endif 153 154 return (diff); 155 } 156 157 #define ETHER_CMP ether_cmp 158 159 #ifdef LANCE_REVC_BUG 160 /* Make sure this is short-aligned, for ether_cmp(). */ 161 static uint16_t bcast_enaddr[3] = { ~0, ~0, ~0 }; 162 #endif 163 164 void 165 lance_config(struct lance_softc *sc) 166 { 167 int i, nbuf; 168 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 169 170 /* Initialize ifnet structure. */ 171 strcpy(ifp->if_xname, device_xname(sc->sc_dev)); 172 ifp->if_softc = sc; 173 ifp->if_start = sc->sc_start; 174 ifp->if_ioctl = lance_ioctl; 175 ifp->if_watchdog = lance_watchdog; 176 ifp->if_init = lance_init; 177 ifp->if_stop = lance_stop; 178 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 179 #ifdef LANCE_REVC_BUG 180 ifp->if_flags &= ~IFF_MULTICAST; 181 #endif 182 IFQ_SET_READY(&ifp->if_snd); 183 184 /* Initialize ifmedia structures. */ 185 ifmedia_init(&sc->sc_media, 0, lance_mediachange, lance_mediastatus); 186 if (sc->sc_supmedia != NULL) { 187 for (i = 0; i < sc->sc_nsupmedia; i++) 188 ifmedia_add(&sc->sc_media, sc->sc_supmedia[i], 189 0, NULL); 190 ifmedia_set(&sc->sc_media, sc->sc_defaultmedia); 191 } else { 192 ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); 193 ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); 194 } 195 196 switch (sc->sc_memsize) { 197 case 8192: 198 sc->sc_nrbuf = 4; 199 sc->sc_ntbuf = 1; 200 break; 201 case 16384: 202 sc->sc_nrbuf = 8; 203 sc->sc_ntbuf = 2; 204 break; 205 case 32768: 206 sc->sc_nrbuf = 16; 207 sc->sc_ntbuf = 4; 208 break; 209 case 65536: 210 sc->sc_nrbuf = 32; 211 sc->sc_ntbuf = 8; 212 break; 213 case 131072: 214 sc->sc_nrbuf = 64; 215 sc->sc_ntbuf = 16; 216 break; 217 case 262144: 218 sc->sc_nrbuf = 128; 219 sc->sc_ntbuf = 32; 220 break; 221 default: 222 /* weird memory size; cope with it */ 223 nbuf = sc->sc_memsize / LEBLEN; 224 sc->sc_ntbuf = nbuf / 5; 225 sc->sc_nrbuf = nbuf - sc->sc_ntbuf; 226 } 227 228 aprint_normal(": address %s\n", ether_sprintf(sc->sc_enaddr)); 229 aprint_normal_dev(sc->sc_dev, 230 "%d receive buffers, %d transmit buffers\n", 231 sc->sc_nrbuf, sc->sc_ntbuf); 232 233 /* Make sure the chip is stopped. */ 234 lance_stop(ifp, 0); 235 236 /* claim 802.1q capability */ 237 sc->sc_ethercom.ec_capabilities |= ETHERCAP_VLAN_MTU; 238 /* Attach the interface. */ 239 if_attach(ifp); 240 ether_ifattach(ifp, sc->sc_enaddr); 241 242 if (pmf_device_register1(sc->sc_dev, NULL, NULL, lance_shutdown)) 243 pmf_class_network_register(sc->sc_dev, ifp); 244 else 245 aprint_error_dev(sc->sc_dev, 246 "couldn't establish power handler\n"); 247 248 sc->sc_rbufaddr = malloc(sc->sc_nrbuf * sizeof(int), M_DEVBUF, 249 M_WAITOK); 250 sc->sc_tbufaddr = malloc(sc->sc_ntbuf * sizeof(int), M_DEVBUF, 251 M_WAITOK); 252 253 rnd_attach_source(&sc->rnd_source, device_xname(sc->sc_dev), 254 RND_TYPE_NET, RND_FLAG_DEFAULT); 255 } 256 257 void 258 lance_reset(struct lance_softc *sc) 259 { 260 int s; 261 262 s = splnet(); 263 lance_init(&sc->sc_ethercom.ec_if); 264 splx(s); 265 } 266 267 void 268 lance_stop(struct ifnet *ifp, int disable) 269 { 270 struct lance_softc *sc = ifp->if_softc; 271 272 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP); 273 } 274 275 /* 276 * Initialization of interface; set up initialization block 277 * and transmit/receive descriptor rings. 278 */ 279 int 280 lance_init(struct ifnet *ifp) 281 { 282 struct lance_softc *sc = ifp->if_softc; 283 int timo; 284 u_long a; 285 286 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP); 287 DELAY(100); 288 289 /* Newer LANCE chips have a reset register */ 290 if (sc->sc_hwreset) 291 (*sc->sc_hwreset)(sc); 292 293 /* Set the correct byte swapping mode, etc. */ 294 (*sc->sc_wrcsr)(sc, LE_CSR3, sc->sc_conf3); 295 296 /* Set up LANCE init block. */ 297 (*sc->sc_meminit)(sc); 298 299 /* Give LANCE the physical address of its init block. */ 300 a = sc->sc_addr + LE_INITADDR(sc); 301 (*sc->sc_wrcsr)(sc, LE_CSR1, a); 302 (*sc->sc_wrcsr)(sc, LE_CSR2, a >> 16); 303 304 /* Try to initialize the LANCE. */ 305 DELAY(100); 306 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INIT); 307 308 /* Wait for initialization to finish. */ 309 for (timo = 100000; timo; timo--) 310 if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON) 311 break; 312 313 if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON) { 314 /* Start the LANCE. */ 315 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_STRT); 316 ifp->if_flags |= IFF_RUNNING; 317 ifp->if_flags &= ~IFF_OACTIVE; 318 ifp->if_timer = 0; 319 (*sc->sc_start)(ifp); 320 } else 321 printf("%s: controller failed to initialize\n", 322 device_xname(sc->sc_dev)); 323 if (sc->sc_hwinit) 324 (*sc->sc_hwinit)(sc); 325 326 return (0); 327 } 328 329 /* 330 * Routine to copy from mbuf chain to transmit buffer in 331 * network buffer memory. 332 */ 333 int 334 lance_put(struct lance_softc *sc, int boff, struct mbuf *m) 335 { 336 struct mbuf *n; 337 int len, tlen = 0; 338 339 for (; m; m = n) { 340 len = m->m_len; 341 if (len == 0) { 342 n = m_free(m); 343 continue; 344 } 345 (*sc->sc_copytobuf)(sc, mtod(m, void *), boff, len); 346 boff += len; 347 tlen += len; 348 n = m_free(m); 349 } 350 if (tlen < LEMINSIZE) { 351 (*sc->sc_zerobuf)(sc, boff, LEMINSIZE - tlen); 352 tlen = LEMINSIZE; 353 } 354 return (tlen); 355 } 356 357 /* 358 * Pull data off an interface. 359 * Len is length of data, with local net header stripped. 360 * We copy the data into mbufs. When full cluster sized units are present 361 * we copy into clusters. 362 */ 363 integrate struct mbuf * 364 lance_get(struct lance_softc *sc, int boff, int totlen) 365 { 366 struct mbuf *m, *m0, *newm; 367 int len; 368 369 MGETHDR(m0, M_DONTWAIT, MT_DATA); 370 if (m0 == 0) 371 return (0); 372 m_set_rcvif(m0, &sc->sc_ethercom.ec_if); 373 m0->m_pkthdr.len = totlen; 374 len = MHLEN; 375 m = m0; 376 377 while (totlen > 0) { 378 if (totlen >= MINCLSIZE) { 379 MCLGET(m, M_DONTWAIT); 380 if ((m->m_flags & M_EXT) == 0) 381 goto bad; 382 len = MCLBYTES; 383 } 384 385 if (m == m0) { 386 char *newdata = (char *) 387 ALIGN(m->m_data + sizeof(struct ether_header)) - 388 sizeof(struct ether_header); 389 len -= newdata - m->m_data; 390 m->m_data = newdata; 391 } 392 393 m->m_len = len = uimin(totlen, len); 394 (*sc->sc_copyfrombuf)(sc, mtod(m, void *), boff, len); 395 boff += len; 396 397 totlen -= len; 398 if (totlen > 0) { 399 MGET(newm, M_DONTWAIT, MT_DATA); 400 if (newm == 0) 401 goto bad; 402 len = MLEN; 403 m = m->m_next = newm; 404 } 405 } 406 407 return (m0); 408 409 bad: 410 m_freem(m0); 411 return (0); 412 } 413 414 /* 415 * Pass a packet to the higher levels. 416 */ 417 void 418 lance_read(struct lance_softc *sc, int boff, int len) 419 { 420 struct mbuf *m; 421 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 422 struct ether_header *eh; 423 424 if (len <= sizeof(struct ether_header) || 425 len > ((sc->sc_ethercom.ec_capenable & ETHERCAP_VLAN_MTU) ? 426 ETHER_VLAN_ENCAP_LEN + ETHERMTU + sizeof(struct ether_header) : 427 ETHERMTU + sizeof(struct ether_header))) { 428 #ifdef LEDEBUG 429 printf("%s: invalid packet size %d; dropping\n", 430 device_xname(sc->sc_dev), len); 431 #endif 432 ifp->if_ierrors++; 433 return; 434 } 435 436 /* Pull packet off interface. */ 437 m = lance_get(sc, boff, len); 438 if (m == 0) { 439 ifp->if_ierrors++; 440 return; 441 } 442 443 eh = mtod(m, struct ether_header *); 444 445 #ifdef LANCE_REVC_BUG 446 /* 447 * The old LANCE (Rev. C) chips have a bug which causes 448 * garbage to be inserted in front of the received packet. 449 * The work-around is to ignore packets with an invalid 450 * destination address (garbage will usually not match). 451 * Of course, this precludes multicast support... 452 */ 453 if (ETHER_CMP(eh->ether_dhost, sc->sc_enaddr) && 454 ETHER_CMP(eh->ether_dhost, bcast_enaddr)) { 455 m_freem(m); 456 return; 457 } 458 #endif 459 460 /* 461 * Some lance device does not present IFF_SIMPLEX behavior on multicast 462 * packets. Make sure to drop it if it is from ourselves. 463 */ 464 if (!ETHER_CMP(eh->ether_shost, sc->sc_enaddr)) { 465 m_freem(m); 466 return; 467 } 468 469 /* Pass the packet up. */ 470 if_percpuq_enqueue(ifp->if_percpuq, m); 471 } 472 473 #undef ifp 474 475 void 476 lance_watchdog(struct ifnet *ifp) 477 { 478 struct lance_softc *sc = ifp->if_softc; 479 480 log(LOG_ERR, "%s: device timeout\n", device_xname(sc->sc_dev)); 481 ++ifp->if_oerrors; 482 483 lance_reset(sc); 484 } 485 486 int 487 lance_mediachange(struct ifnet *ifp) 488 { 489 struct lance_softc *sc = ifp->if_softc; 490 491 if (sc->sc_mediachange) 492 return ((*sc->sc_mediachange)(sc)); 493 return (0); 494 } 495 496 void 497 lance_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) 498 { 499 struct lance_softc *sc = ifp->if_softc; 500 501 if ((ifp->if_flags & IFF_UP) == 0) 502 return; 503 504 ifmr->ifm_status = IFM_AVALID; 505 if (sc->sc_havecarrier) 506 ifmr->ifm_status |= IFM_ACTIVE; 507 508 if (sc->sc_mediastatus) 509 (*sc->sc_mediastatus)(sc, ifmr); 510 } 511 512 /* 513 * Process an ioctl request. 514 */ 515 int 516 lance_ioctl(struct ifnet *ifp, u_long cmd, void *data) 517 { 518 struct lance_softc *sc = ifp->if_softc; 519 struct ifreq *ifr = (struct ifreq *)data; 520 int s, error = 0; 521 522 s = splnet(); 523 524 switch (cmd) { 525 case SIOCGIFMEDIA: 526 case SIOCSIFMEDIA: 527 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 528 break; 529 default: 530 if ((error = ether_ioctl(ifp, cmd, data)) != ENETRESET) 531 break; 532 error = 0; 533 if (cmd != SIOCADDMULTI && cmd != SIOCDELMULTI) 534 break; 535 if (ifp->if_flags & IFF_RUNNING) { 536 /* 537 * Multicast list has changed; set the hardware filter 538 * accordingly. 539 */ 540 lance_reset(sc); 541 } 542 break; 543 544 } 545 546 splx(s); 547 return (error); 548 } 549 550 hide bool 551 lance_shutdown(device_t self, int howto) 552 { 553 struct lance_softc *sc = device_private(self); 554 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 555 556 lance_stop(ifp, 0); 557 558 return true; 559 } 560 561 /* 562 * Set up the logical address filter. 563 */ 564 void 565 lance_setladrf(struct ethercom *ac, uint16_t *af) 566 { 567 struct ifnet *ifp = &ac->ec_if; 568 struct ether_multi *enm; 569 uint32_t crc; 570 struct ether_multistep step; 571 572 /* 573 * Set up multicast address filter by passing all multicast addresses 574 * through a crc generator, and then using the high order 6 bits as an 575 * index into the 64 bit logical address filter. The high order bit 576 * selects the word, while the rest of the bits select the bit within 577 * the word. 578 */ 579 580 if (ifp->if_flags & IFF_PROMISC) 581 goto allmulti; 582 583 af[0] = af[1] = af[2] = af[3] = 0x0000; 584 ETHER_FIRST_MULTI(step, ac, enm); 585 while (enm != NULL) { 586 if (ETHER_CMP(enm->enm_addrlo, enm->enm_addrhi)) { 587 /* 588 * We must listen to a range of multicast addresses. 589 * For now, just accept all multicasts, rather than 590 * trying to set only those filter bits needed to match 591 * the range. (At this time, the only use of address 592 * ranges is for IP multicast routing, for which the 593 * range is big enough to require all bits set.) 594 */ 595 goto allmulti; 596 } 597 598 crc = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN); 599 600 /* Just want the 6 most significant bits. */ 601 crc >>= 26; 602 603 /* Set the corresponding bit in the filter. */ 604 af[crc >> 4] |= 1 << (crc & 0xf); 605 606 ETHER_NEXT_MULTI(step, enm); 607 } 608 ifp->if_flags &= ~IFF_ALLMULTI; 609 return; 610 611 allmulti: 612 ifp->if_flags |= IFF_ALLMULTI; 613 af[0] = af[1] = af[2] = af[3] = 0xffff; 614 } 615 616 /* 617 * Routines for accessing the transmit and receive buffers. 618 * The various CPU and adapter configurations supported by this 619 * driver require three different access methods for buffers 620 * and descriptors: 621 * (1) contig (contiguous data; no padding), 622 * (2) gap2 (two bytes of data followed by two bytes of padding), 623 * (3) gap16 (16 bytes of data followed by 16 bytes of padding). 624 */ 625 626 /* 627 * contig: contiguous data with no padding. 628 * 629 * Buffers may have any alignment. 630 */ 631 632 void 633 lance_copytobuf_contig(struct lance_softc *sc, void *from, int boff, int len) 634 { 635 uint8_t *buf = sc->sc_mem; 636 637 /* 638 * Just call memcpy() to do the work. 639 */ 640 memcpy(buf + boff, from, len); 641 } 642 643 void 644 lance_copyfrombuf_contig(struct lance_softc *sc, void *to, int boff, int len) 645 { 646 uint8_t *buf = sc->sc_mem; 647 648 /* 649 * Just call memcpy() to do the work. 650 */ 651 memcpy(to, buf + boff, len); 652 } 653 654 void 655 lance_zerobuf_contig(struct lance_softc *sc, int boff, int len) 656 { 657 uint8_t *buf = sc->sc_mem; 658 659 /* 660 * Just let memset() do the work 661 */ 662 memset(buf + boff, 0, len); 663 } 664 665 #if 0 666 /* 667 * Examples only; duplicate these and tweak (if necessary) in 668 * machine-specific front-ends. 669 */ 670 671 /* 672 * gap2: two bytes of data followed by two bytes of pad. 673 * 674 * Buffers must be 4-byte aligned. The code doesn't worry about 675 * doing an extra byte. 676 */ 677 678 void 679 lance_copytobuf_gap2(struct lance_softc *sc, void *fromv, int boff, int len) 680 { 681 volatile void *buf = sc->sc_mem; 682 void *from = fromv; 683 volatile uint16_t *bptr; 684 685 if (boff & 0x1) { 686 /* handle unaligned first byte */ 687 bptr = ((volatile uint16_t *)buf) + (boff - 1); 688 *bptr = (*from++ << 8) | (*bptr & 0xff); 689 bptr += 2; 690 len--; 691 } else 692 bptr = ((volatile uint16_t *)buf) + boff; 693 while (len > 1) { 694 *bptr = (from[1] << 8) | (from[0] & 0xff); 695 bptr += 2; 696 from += 2; 697 len -= 2; 698 } 699 if (len == 1) 700 *bptr = (uint16_t)*from; 701 } 702 703 void 704 lance_copyfrombuf_gap2(struct lance_softc *sc, void *tov, int boff, int len) 705 { 706 volatile void *buf = sc->sc_mem; 707 void *to = tov; 708 volatile uint16_t *bptr; 709 uint16_t tmp; 710 711 if (boff & 0x1) { 712 /* handle unaligned first byte */ 713 bptr = ((volatile uint16_t *)buf) + (boff - 1); 714 *to++ = (*bptr >> 8) & 0xff; 715 bptr += 2; 716 len--; 717 } else 718 bptr = ((volatile uint16_t *)buf) + boff; 719 while (len > 1) { 720 tmp = *bptr; 721 *to++ = tmp & 0xff; 722 *to++ = (tmp >> 8) & 0xff; 723 bptr += 2; 724 len -= 2; 725 } 726 if (len == 1) 727 *to = *bptr & 0xff; 728 } 729 730 void 731 lance_zerobuf_gap2(struct lance_softc *sc, int boff, int len) 732 { 733 volatile void *buf = sc->sc_mem; 734 volatile uint16_t *bptr; 735 736 if ((unsigned int)boff & 0x1) { 737 bptr = ((volatile uint16_t *)buf) + (boff - 1); 738 *bptr &= 0xff; 739 bptr += 2; 740 len--; 741 } else 742 bptr = ((volatile uint16_t *)buf) + boff; 743 while (len > 0) { 744 *bptr = 0; 745 bptr += 2; 746 len -= 2; 747 } 748 } 749 750 /* 751 * gap16: 16 bytes of data followed by 16 bytes of pad. 752 * 753 * Buffers must be 32-byte aligned. 754 */ 755 756 void 757 lance_copytobuf_gap16(struct lance_softc *sc, void *fromv, int boff, int len) 758 { 759 volatile uint8_t *buf = sc->sc_mem; 760 void *from = fromv; 761 uint8_t *bptr; 762 int xfer; 763 764 bptr = buf + ((boff << 1) & ~0x1f); 765 boff &= 0xf; 766 xfer = uimin(len, 16 - boff); 767 while (len > 0) { 768 memcpy(bptr + boff, from, xfer); 769 from += xfer; 770 bptr += 32; 771 boff = 0; 772 len -= xfer; 773 xfer = uimin(len, 16); 774 } 775 } 776 777 void 778 lance_copyfrombuf_gap16(struct lance_softc *sc, void *tov, int boff, int len) 779 { 780 volatile uint8_t *buf = sc->sc_mem; 781 void *to = tov; 782 uint8_t *bptr; 783 int xfer; 784 785 bptr = buf + ((boff << 1) & ~0x1f); 786 boff &= 0xf; 787 xfer = uimin(len, 16 - boff); 788 while (len > 0) { 789 memcpy(to, bptr + boff, xfer); 790 to += xfer; 791 bptr += 32; 792 boff = 0; 793 len -= xfer; 794 xfer = uimin(len, 16); 795 } 796 } 797 798 void 799 lance_zerobuf_gap16(struct lance_softc *sc, int boff, int len) 800 { 801 volatile uint8_t *buf = sc->sc_mem; 802 uint8_t *bptr; 803 int xfer; 804 805 bptr = buf + ((boff << 1) & ~0x1f); 806 boff &= 0xf; 807 xfer = uimin(len, 16 - boff); 808 while (len > 0) { 809 memset(bptr + boff, 0, xfer); 810 bptr += 32; 811 boff = 0; 812 len -= xfer; 813 xfer = uimin(len, 16); 814 } 815 } 816 #endif /* Example only */ 817