1 /* $NetBSD: lance.c,v 1.34 2005/12/24 20:27:30 perry 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 __FBSDID("$FreeBSD$"); 69 70 #include <sys/param.h> 71 #include <sys/bus.h> 72 #include <sys/endian.h> 73 #include <sys/lock.h> 74 #include <sys/kernel.h> 75 #include <sys/mbuf.h> 76 #include <sys/mutex.h> 77 #include <sys/socket.h> 78 #include <sys/sockio.h> 79 80 #include <net/ethernet.h> 81 #include <net/if.h> 82 #include <net/if_var.h> 83 #include <net/if_arp.h> 84 #include <net/if_dl.h> 85 #include <net/if_media.h> 86 #include <net/if_types.h> 87 #include <net/if_vlan_var.h> 88 89 #include <machine/bus.h> 90 91 #include <dev/le/lancereg.h> 92 #include <dev/le/lancevar.h> 93 94 devclass_t le_devclass; 95 96 static void lance_start(struct ifnet *); 97 static void lance_stop(struct lance_softc *); 98 static void lance_init(void *); 99 static void lance_watchdog(void *s); 100 static int lance_mediachange(struct ifnet *); 101 static void lance_mediastatus(struct ifnet *, struct ifmediareq *); 102 static int lance_ioctl(struct ifnet *, u_long, caddr_t); 103 104 int 105 lance_config(struct lance_softc *sc, const char* name, int unit) 106 { 107 struct ifnet *ifp; 108 int i, nbuf; 109 110 if (LE_LOCK_INITIALIZED(sc) == 0) 111 return (ENXIO); 112 113 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 114 if (ifp == NULL) 115 return (ENOSPC); 116 117 callout_init_mtx(&sc->sc_wdog_ch, &sc->sc_mtx, 0); 118 119 /* Initialize ifnet structure. */ 120 ifp->if_softc = sc; 121 if_initname(ifp, name, unit); 122 ifp->if_start = lance_start; 123 ifp->if_ioctl = lance_ioctl; 124 ifp->if_init = lance_init; 125 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 126 #ifdef LANCE_REVC_BUG 127 ifp->if_flags &= ~IFF_MULTICAST; 128 #endif 129 ifp->if_baudrate = IF_Mbps(10); 130 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 131 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; 132 IFQ_SET_READY(&ifp->if_snd); 133 134 /* Initialize ifmedia structures. */ 135 ifmedia_init(&sc->sc_media, 0, lance_mediachange, lance_mediastatus); 136 if (sc->sc_supmedia != NULL) { 137 for (i = 0; i < sc->sc_nsupmedia; i++) 138 ifmedia_add(&sc->sc_media, sc->sc_supmedia[i], 0, NULL); 139 ifmedia_set(&sc->sc_media, sc->sc_defaultmedia); 140 } else { 141 ifmedia_add(&sc->sc_media, 142 IFM_MAKEWORD(IFM_ETHER, IFM_MANUAL, 0, 0), 0, NULL); 143 ifmedia_set(&sc->sc_media, 144 IFM_MAKEWORD(IFM_ETHER, IFM_MANUAL, 0, 0)); 145 } 146 147 switch (sc->sc_memsize) { 148 case 8192: 149 sc->sc_nrbuf = 4; 150 sc->sc_ntbuf = 1; 151 break; 152 case 16384: 153 sc->sc_nrbuf = 8; 154 sc->sc_ntbuf = 2; 155 break; 156 case 32768: 157 sc->sc_nrbuf = 16; 158 sc->sc_ntbuf = 4; 159 break; 160 case 65536: 161 sc->sc_nrbuf = 32; 162 sc->sc_ntbuf = 8; 163 break; 164 case 131072: 165 sc->sc_nrbuf = 64; 166 sc->sc_ntbuf = 16; 167 break; 168 case 262144: 169 sc->sc_nrbuf = 128; 170 sc->sc_ntbuf = 32; 171 break; 172 default: 173 /* weird memory size; cope with it */ 174 nbuf = sc->sc_memsize / LEBLEN; 175 sc->sc_ntbuf = nbuf / 5; 176 sc->sc_nrbuf = nbuf - sc->sc_ntbuf; 177 } 178 179 if_printf(ifp, "%d receive buffers, %d transmit buffers\n", 180 sc->sc_nrbuf, sc->sc_ntbuf); 181 182 /* Make sure the chip is stopped. */ 183 LE_LOCK(sc); 184 lance_stop(sc); 185 LE_UNLOCK(sc); 186 187 return (0); 188 } 189 190 void 191 lance_attach(struct lance_softc *sc) 192 { 193 struct ifnet *ifp = sc->sc_ifp; 194 195 /* Attach the interface. */ 196 ether_ifattach(ifp, sc->sc_enaddr); 197 198 /* Claim 802.1q capability. */ 199 ifp->if_hdrlen = sizeof(struct ether_vlan_header); 200 ifp->if_capabilities |= IFCAP_VLAN_MTU; 201 ifp->if_capenable |= IFCAP_VLAN_MTU; 202 } 203 204 void 205 lance_detach(struct lance_softc *sc) 206 { 207 struct ifnet *ifp = sc->sc_ifp; 208 209 LE_LOCK(sc); 210 lance_stop(sc); 211 LE_UNLOCK(sc); 212 callout_drain(&sc->sc_wdog_ch); 213 ether_ifdetach(ifp); 214 if_free(ifp); 215 } 216 217 void 218 lance_suspend(struct lance_softc *sc) 219 { 220 221 LE_LOCK(sc); 222 lance_stop(sc); 223 LE_UNLOCK(sc); 224 } 225 226 void 227 lance_resume(struct lance_softc *sc) 228 { 229 230 LE_LOCK(sc); 231 if (sc->sc_ifp->if_flags & IFF_UP) 232 lance_init_locked(sc); 233 LE_UNLOCK(sc); 234 } 235 236 static void 237 lance_start(struct ifnet *ifp) 238 { 239 struct lance_softc *sc = ifp->if_softc; 240 241 LE_LOCK(sc); 242 (*sc->sc_start_locked)(sc); 243 LE_UNLOCK(sc); 244 } 245 246 static void 247 lance_stop(struct lance_softc *sc) 248 { 249 struct ifnet *ifp = sc->sc_ifp; 250 251 LE_LOCK_ASSERT(sc, MA_OWNED); 252 253 /* 254 * Mark the interface down and cancel the watchdog timer. 255 */ 256 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 257 callout_stop(&sc->sc_wdog_ch); 258 sc->sc_wdog_timer = 0; 259 260 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP); 261 } 262 263 static void 264 lance_init(void *xsc) 265 { 266 struct lance_softc *sc = (struct lance_softc *)xsc; 267 268 LE_LOCK(sc); 269 lance_init_locked(sc); 270 LE_UNLOCK(sc); 271 } 272 273 /* 274 * Initialization of interface; set up initialization block 275 * and transmit/receive descriptor rings. 276 */ 277 void 278 lance_init_locked(struct lance_softc *sc) 279 { 280 struct ifnet *ifp = sc->sc_ifp; 281 u_long a; 282 int timo; 283 284 LE_LOCK_ASSERT(sc, MA_OWNED); 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 the current media. This may require the chip to be stopped. */ 297 if (sc->sc_mediachange) 298 (void)(*sc->sc_mediachange)(sc); 299 300 /* 301 * Update our private copy of the Ethernet address. 302 * We NEED the copy so we can ensure its alignment! 303 */ 304 memcpy(sc->sc_enaddr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 305 306 /* Set up LANCE init block. */ 307 (*sc->sc_meminit)(sc); 308 309 /* Give LANCE the physical address of its init block. */ 310 a = sc->sc_addr + LE_INITADDR(sc); 311 (*sc->sc_wrcsr)(sc, LE_CSR1, a & 0xffff); 312 (*sc->sc_wrcsr)(sc, LE_CSR2, a >> 16); 313 314 /* Try to initialize the LANCE. */ 315 DELAY(100); 316 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INIT); 317 318 /* Wait for initialization to finish. */ 319 for (timo = 100000; timo; timo--) 320 if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON) 321 break; 322 323 if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON) { 324 /* Start the LANCE. */ 325 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_STRT); 326 ifp->if_drv_flags |= IFF_DRV_RUNNING; 327 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 328 sc->sc_wdog_timer = 0; 329 callout_reset(&sc->sc_wdog_ch, hz, lance_watchdog, sc); 330 (*sc->sc_start_locked)(sc); 331 } else 332 if_printf(ifp, "controller failed to initialize\n"); 333 334 if (sc->sc_hwinit) 335 (*sc->sc_hwinit)(sc); 336 } 337 338 /* 339 * Routine to copy from mbuf chain to transmit buffer in 340 * network buffer memory. 341 */ 342 int 343 lance_put(struct lance_softc *sc, int boff, struct mbuf *m) 344 { 345 struct mbuf *n; 346 int len, tlen = 0; 347 348 LE_LOCK_ASSERT(sc, MA_OWNED); 349 350 for (; m; m = n) { 351 len = m->m_len; 352 if (len == 0) { 353 n = m_free(m); 354 m = NULL; 355 continue; 356 } 357 (*sc->sc_copytobuf)(sc, mtod(m, caddr_t), boff, len); 358 boff += len; 359 tlen += len; 360 n = m_free(m); 361 m = NULL; 362 } 363 if (tlen < LEMINSIZE) { 364 (*sc->sc_zerobuf)(sc, boff, LEMINSIZE - tlen); 365 tlen = LEMINSIZE; 366 } 367 return (tlen); 368 } 369 370 /* 371 * Pull data off an interface. 372 * Len is length of data, with local net header stripped. 373 * We copy the data into mbufs. When full cluster sized units are present 374 * we copy into clusters. 375 */ 376 struct mbuf * 377 lance_get(struct lance_softc *sc, int boff, int totlen) 378 { 379 struct ifnet *ifp = sc->sc_ifp; 380 struct mbuf *m, *m0, *newm; 381 caddr_t newdata; 382 int len; 383 384 if (totlen <= ETHER_HDR_LEN || totlen > LEBLEN - ETHER_CRC_LEN) { 385 #ifdef LEDEBUG 386 if_printf(ifp, "invalid packet size %d; dropping\n", totlen); 387 #endif 388 return (NULL); 389 } 390 391 MGETHDR(m0, M_NOWAIT, MT_DATA); 392 if (m0 == NULL) 393 return (NULL); 394 m0->m_pkthdr.rcvif = ifp; 395 m0->m_pkthdr.len = totlen; 396 len = MHLEN; 397 m = m0; 398 399 while (totlen > 0) { 400 if (totlen >= MINCLSIZE) { 401 if (!(MCLGET(m, M_NOWAIT))) 402 goto bad; 403 len = MCLBYTES; 404 } 405 406 if (m == m0) { 407 newdata = (caddr_t) 408 ALIGN(m->m_data + ETHER_HDR_LEN) - ETHER_HDR_LEN; 409 len -= newdata - m->m_data; 410 m->m_data = newdata; 411 } 412 413 m->m_len = len = min(totlen, len); 414 (*sc->sc_copyfrombuf)(sc, mtod(m, caddr_t), boff, len); 415 boff += len; 416 417 totlen -= len; 418 if (totlen > 0) { 419 MGET(newm, M_NOWAIT, MT_DATA); 420 if (newm == 0) 421 goto bad; 422 len = MLEN; 423 m = m->m_next = newm; 424 } 425 } 426 427 return (m0); 428 429 bad: 430 m_freem(m0); 431 return (NULL); 432 } 433 434 static void 435 lance_watchdog(void *xsc) 436 { 437 struct lance_softc *sc = (struct lance_softc *)xsc; 438 struct ifnet *ifp = sc->sc_ifp; 439 440 LE_LOCK_ASSERT(sc, MA_OWNED); 441 442 if (sc->sc_wdog_timer == 0 || --sc->sc_wdog_timer != 0) { 443 callout_reset(&sc->sc_wdog_ch, hz, lance_watchdog, sc); 444 return; 445 } 446 447 if_printf(ifp, "device timeout\n"); 448 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 449 lance_init_locked(sc); 450 } 451 452 static int 453 lance_mediachange(struct ifnet *ifp) 454 { 455 struct lance_softc *sc = ifp->if_softc; 456 457 if (sc->sc_mediachange) { 458 /* 459 * For setting the port in LE_CSR15 the PCnet chips must 460 * be powered down or stopped and unlike documented may 461 * not take effect without an initialization. So don't 462 * invoke (*sc_mediachange) directly here but go through 463 * lance_init_locked(). 464 */ 465 LE_LOCK(sc); 466 lance_stop(sc); 467 lance_init_locked(sc); 468 if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) 469 (*sc->sc_start_locked)(sc); 470 LE_UNLOCK(sc); 471 } 472 return (0); 473 } 474 475 static void 476 lance_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) 477 { 478 struct lance_softc *sc = ifp->if_softc; 479 480 LE_LOCK(sc); 481 if (!(ifp->if_flags & IFF_UP)) { 482 LE_UNLOCK(sc); 483 return; 484 } 485 486 ifmr->ifm_status = IFM_AVALID; 487 if (sc->sc_flags & LE_CARRIER) 488 ifmr->ifm_status |= IFM_ACTIVE; 489 490 if (sc->sc_mediastatus) 491 (*sc->sc_mediastatus)(sc, ifmr); 492 LE_UNLOCK(sc); 493 } 494 495 /* 496 * Process an ioctl request. 497 */ 498 static int 499 lance_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 500 { 501 struct lance_softc *sc = ifp->if_softc; 502 struct ifreq *ifr = (struct ifreq *)data; 503 int error = 0; 504 505 switch (cmd) { 506 case SIOCSIFFLAGS: 507 LE_LOCK(sc); 508 if (ifp->if_flags & IFF_PROMISC) { 509 if (!(sc->sc_flags & LE_PROMISC)) { 510 sc->sc_flags |= LE_PROMISC; 511 lance_init_locked(sc); 512 } 513 } else if (sc->sc_flags & LE_PROMISC) { 514 sc->sc_flags &= ~LE_PROMISC; 515 lance_init_locked(sc); 516 } 517 518 if ((ifp->if_flags & IFF_ALLMULTI) && 519 !(sc->sc_flags & LE_ALLMULTI)) { 520 sc->sc_flags |= LE_ALLMULTI; 521 lance_init_locked(sc); 522 } else if (!(ifp->if_flags & IFF_ALLMULTI) && 523 (sc->sc_flags & LE_ALLMULTI)) { 524 sc->sc_flags &= ~LE_ALLMULTI; 525 lance_init_locked(sc); 526 } 527 528 if (!(ifp->if_flags & IFF_UP) && 529 ifp->if_drv_flags & IFF_DRV_RUNNING) { 530 /* 531 * If interface is marked down and it is running, then 532 * stop it. 533 */ 534 lance_stop(sc); 535 } else if (ifp->if_flags & IFF_UP && 536 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 537 /* 538 * If interface is marked up and it is stopped, then 539 * start it. 540 */ 541 lance_init_locked(sc); 542 } 543 #ifdef LEDEBUG 544 if (ifp->if_flags & IFF_DEBUG) 545 sc->sc_flags |= LE_DEBUG; 546 else 547 sc->sc_flags &= ~LE_DEBUG; 548 #endif 549 LE_UNLOCK(sc); 550 break; 551 552 case SIOCADDMULTI: 553 case SIOCDELMULTI: 554 /* 555 * Multicast list has changed; set the hardware filter 556 * accordingly. 557 */ 558 LE_LOCK(sc); 559 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 560 lance_init_locked(sc); 561 LE_UNLOCK(sc); 562 break; 563 564 case SIOCGIFMEDIA: 565 case SIOCSIFMEDIA: 566 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 567 break; 568 569 default: 570 error = ether_ioctl(ifp, cmd, data); 571 break; 572 } 573 574 return (error); 575 } 576 577 /* 578 * Set up the logical address filter. 579 */ 580 void 581 lance_setladrf(struct lance_softc *sc, uint16_t *af) 582 { 583 struct ifnet *ifp = sc->sc_ifp; 584 struct ifmultiaddr *ifma; 585 uint32_t crc; 586 587 /* 588 * Set up multicast address filter by passing all multicast addresses 589 * through a crc generator, and then using the high order 6 bits as an 590 * index into the 64 bit logical address filter. The high order bit 591 * selects the word, while the rest of the bits select the bit within 592 * the word. 593 */ 594 595 if (ifp->if_flags & IFF_PROMISC || sc->sc_flags & LE_ALLMULTI) { 596 af[0] = af[1] = af[2] = af[3] = 0xffff; 597 return; 598 } 599 600 af[0] = af[1] = af[2] = af[3] = 0x0000; 601 if_maddr_rlock(ifp); 602 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 603 if (ifma->ifma_addr->sa_family != AF_LINK) 604 continue; 605 606 crc = ether_crc32_le(LLADDR((struct sockaddr_dl *) 607 ifma->ifma_addr), ETHER_ADDR_LEN); 608 609 /* Just want the 6 most significant bits. */ 610 crc >>= 26; 611 612 /* Set the corresponding bit in the filter. */ 613 af[crc >> 4] |= LE_HTOLE16(1 << (crc & 0xf)); 614 } 615 if_maddr_runlock(ifp); 616 } 617 618 /* 619 * Routines for accessing the transmit and receive buffers. 620 * The various CPU and adapter configurations supported by this 621 * driver require three different access methods for buffers 622 * and descriptors: 623 * (1) contig (contiguous data; no padding), 624 * (2) gap2 (two bytes of data followed by two bytes of padding), 625 * (3) gap16 (16 bytes of data followed by 16 bytes of padding). 626 */ 627 628 /* 629 * contig: contiguous data with no padding. 630 * 631 * Buffers may have any alignment. 632 */ 633 634 void 635 lance_copytobuf_contig(struct lance_softc *sc, void *from, int boff, int len) 636 { 637 volatile caddr_t buf = sc->sc_mem; 638 639 /* 640 * Just call memcpy() to do the work. 641 */ 642 memcpy(buf + boff, from, len); 643 } 644 645 void 646 lance_copyfrombuf_contig(struct lance_softc *sc, void *to, int boff, int len) 647 { 648 volatile caddr_t buf = sc->sc_mem; 649 650 /* 651 * Just call memcpy() to do the work. 652 */ 653 memcpy(to, buf + boff, len); 654 } 655 656 void 657 lance_zerobuf_contig(struct lance_softc *sc, int boff, int len) 658 { 659 volatile caddr_t buf = sc->sc_mem; 660 661 /* 662 * Just let memset() do the work 663 */ 664 memset(buf + boff, 0, len); 665 } 666 667 #if 0 668 /* 669 * Examples only; duplicate these and tweak (if necessary) in 670 * machine-specific front-ends. 671 */ 672 673 /* 674 * gap2: two bytes of data followed by two bytes of pad. 675 * 676 * Buffers must be 4-byte aligned. The code doesn't worry about 677 * doing an extra byte. 678 */ 679 680 static void 681 lance_copytobuf_gap2(struct lance_softc *sc, void *fromv, int boff, int len) 682 { 683 volatile caddr_t buf = sc->sc_mem; 684 caddr_t from = fromv; 685 volatile uint16_t *bptr; 686 687 if (boff & 0x1) { 688 /* Handle unaligned first byte. */ 689 bptr = ((volatile uint16_t *)buf) + (boff - 1); 690 *bptr = (*from++ << 8) | (*bptr & 0xff); 691 bptr += 2; 692 len--; 693 } else 694 bptr = ((volatile uint16_t *)buf) + boff; 695 while (len > 1) { 696 *bptr = (from[1] << 8) | (from[0] & 0xff); 697 bptr += 2; 698 from += 2; 699 len -= 2; 700 } 701 if (len == 1) 702 *bptr = (uint16_t)*from; 703 } 704 705 static void 706 lance_copyfrombuf_gap2(struct lance_softc *sc, void *tov, int boff, int len) 707 { 708 volatile caddr_t buf = sc->sc_mem; 709 caddr_t to = tov; 710 volatile uint16_t *bptr; 711 uint16_t tmp; 712 713 if (boff & 0x1) { 714 /* Handle unaligned first byte. */ 715 bptr = ((volatile uint16_t *)buf) + (boff - 1); 716 *to++ = (*bptr >> 8) & 0xff; 717 bptr += 2; 718 len--; 719 } else 720 bptr = ((volatile uint16_t *)buf) + boff; 721 while (len > 1) { 722 tmp = *bptr; 723 *to++ = tmp & 0xff; 724 *to++ = (tmp >> 8) & 0xff; 725 bptr += 2; 726 len -= 2; 727 } 728 if (len == 1) 729 *to = *bptr & 0xff; 730 } 731 732 static void 733 lance_zerobuf_gap2(struct lance_softc *sc, int boff, int len) 734 { 735 volatile caddr_t buf = sc->sc_mem; 736 volatile uint16_t *bptr; 737 738 if ((unsigned)boff & 0x1) { 739 bptr = ((volatile uint16_t *)buf) + (boff - 1); 740 *bptr &= 0xff; 741 bptr += 2; 742 len--; 743 } else 744 bptr = ((volatile uint16_t *)buf) + boff; 745 while (len > 0) { 746 *bptr = 0; 747 bptr += 2; 748 len -= 2; 749 } 750 } 751 752 /* 753 * gap16: 16 bytes of data followed by 16 bytes of pad. 754 * 755 * Buffers must be 32-byte aligned. 756 */ 757 758 static void 759 lance_copytobuf_gap16(struct lance_softc *sc, void *fromv, int boff, int len) 760 { 761 volatile caddr_t buf = sc->sc_mem; 762 caddr_t bptr, from = fromv; 763 int xfer; 764 765 bptr = buf + ((boff << 1) & ~0x1f); 766 boff &= 0xf; 767 xfer = min(len, 16 - boff); 768 while (len > 0) { 769 memcpy(bptr + boff, from, xfer); 770 from += xfer; 771 bptr += 32; 772 boff = 0; 773 len -= xfer; 774 xfer = min(len, 16); 775 } 776 } 777 778 static void 779 lance_copyfrombuf_gap16(struct lance_softc *sc, void *tov, int boff, int len) 780 { 781 volatile caddr_t buf = sc->sc_mem; 782 caddr_t bptr, to = tov; 783 int xfer; 784 785 bptr = buf + ((boff << 1) & ~0x1f); 786 boff &= 0xf; 787 xfer = min(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 = min(len, 16); 795 } 796 } 797 798 static void 799 lance_zerobuf_gap16(struct lance_softc *sc, int boff, int len) 800 { 801 volatile caddr_t buf = sc->sc_mem; 802 caddr_t bptr; 803 int xfer; 804 805 bptr = buf + ((boff << 1) & ~0x1f); 806 boff &= 0xf; 807 xfer = min(len, 16 - boff); 808 while (len > 0) { 809 memset(bptr + boff, 0, xfer); 810 bptr += 32; 811 boff = 0; 812 len -= xfer; 813 xfer = min(len, 16); 814 } 815 } 816 #endif /* Example only */ 817