Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/le/lance.c
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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 * 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 __FBSDID("$FreeBSD$"); 76 77 #include <sys/param.h> 78 #include <sys/bus.h> 79 #include <sys/endian.h> 80 #include <sys/lock.h> 81 #include <sys/kernel.h> 82 #include <sys/mbuf.h> 83 #include <sys/mutex.h> 84 #include <sys/socket.h> 85 #include <sys/sockio.h> 86 87 #include <net/ethernet.h> 88 #include <net/if.h> 89 #include <net/if_arp.h> 90 #include <net/if_dl.h> 91 #include <net/if_media.h> 92 #include <net/if_types.h> 93 #include <net/if_vlan_var.h> 94 95 #include <machine/bus.h> 96 97 #include <dev/le/lancereg.h> 98 #include <dev/le/lancevar.h> 99 100 devclass_t le_devclass; 101 102 static void lance_start(struct ifnet *); 103 static void lance_stop(struct lance_softc *); 104 static void lance_init(void *); 105 static void lance_watchdog(void *s); 106 static int lance_mediachange(struct ifnet *); 107 static void lance_mediastatus(struct ifnet *, struct ifmediareq *); 108 static int lance_ioctl(struct ifnet *, u_long, caddr_t); 109 110 int 111 lance_config(struct lance_softc *sc, const char* name, int unit) 112 { 113 struct ifnet *ifp; 114 int i, nbuf; 115 116 if (LE_LOCK_INITIALIZED(sc) == 0) 117 return (ENXIO); 118 119 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 120 if (ifp == NULL) 121 return (ENOSPC); 122 123 callout_init_mtx(&sc->sc_wdog_ch, &sc->sc_mtx, 0); 124 125 /* Initialize ifnet structure. */ 126 ifp->if_softc = sc; 127 if_initname(ifp, name, unit); 128 ifp->if_start = lance_start; 129 ifp->if_ioctl = lance_ioctl; 130 ifp->if_init = lance_init; 131 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 132 #ifdef LANCE_REVC_BUG 133 ifp->if_flags &= ~IFF_MULTICAST; 134 #endif 135 ifp->if_baudrate = IF_Mbps(10); 136 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 137 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; 138 IFQ_SET_READY(&ifp->if_snd); 139 140 /* Initialize ifmedia structures. */ 141 ifmedia_init(&sc->sc_media, 0, lance_mediachange, lance_mediastatus); 142 if (sc->sc_supmedia != NULL) { 143 for (i = 0; i < sc->sc_nsupmedia; i++) 144 ifmedia_add(&sc->sc_media, sc->sc_supmedia[i], 0, NULL); 145 ifmedia_set(&sc->sc_media, sc->sc_defaultmedia); 146 } else { 147 ifmedia_add(&sc->sc_media, 148 IFM_MAKEWORD(IFM_ETHER, IFM_MANUAL, 0, 0), 0, NULL); 149 ifmedia_set(&sc->sc_media, 150 IFM_MAKEWORD(IFM_ETHER, IFM_MANUAL, 0, 0)); 151 } 152 153 switch (sc->sc_memsize) { 154 case 8192: 155 sc->sc_nrbuf = 4; 156 sc->sc_ntbuf = 1; 157 break; 158 case 16384: 159 sc->sc_nrbuf = 8; 160 sc->sc_ntbuf = 2; 161 break; 162 case 32768: 163 sc->sc_nrbuf = 16; 164 sc->sc_ntbuf = 4; 165 break; 166 case 65536: 167 sc->sc_nrbuf = 32; 168 sc->sc_ntbuf = 8; 169 break; 170 case 131072: 171 sc->sc_nrbuf = 64; 172 sc->sc_ntbuf = 16; 173 break; 174 case 262144: 175 sc->sc_nrbuf = 128; 176 sc->sc_ntbuf = 32; 177 break; 178 default: 179 /* weird memory size; cope with it */ 180 nbuf = sc->sc_memsize / LEBLEN; 181 sc->sc_ntbuf = nbuf / 5; 182 sc->sc_nrbuf = nbuf - sc->sc_ntbuf; 183 } 184 185 if_printf(ifp, "%d receive buffers, %d transmit buffers\n", 186 sc->sc_nrbuf, sc->sc_ntbuf); 187 188 /* Make sure the chip is stopped. */ 189 LE_LOCK(sc); 190 lance_stop(sc); 191 LE_UNLOCK(sc); 192 193 return (0); 194 } 195 196 void 197 lance_attach(struct lance_softc *sc) 198 { 199 struct ifnet *ifp = sc->sc_ifp; 200 201 /* Attach the interface. */ 202 ether_ifattach(ifp, sc->sc_enaddr); 203 204 /* Claim 802.1q capability. */ 205 ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header); 206 ifp->if_capabilities |= IFCAP_VLAN_MTU; 207 ifp->if_capenable |= IFCAP_VLAN_MTU; 208 } 209 210 void 211 lance_detach(struct lance_softc *sc) 212 { 213 struct ifnet *ifp = sc->sc_ifp; 214 215 LE_LOCK(sc); 216 lance_stop(sc); 217 LE_UNLOCK(sc); 218 callout_drain(&sc->sc_wdog_ch); 219 ether_ifdetach(ifp); 220 if_free(ifp); 221 } 222 223 void 224 lance_suspend(struct lance_softc *sc) 225 { 226 227 LE_LOCK(sc); 228 lance_stop(sc); 229 LE_UNLOCK(sc); 230 } 231 232 void 233 lance_resume(struct lance_softc *sc) 234 { 235 236 LE_LOCK(sc); 237 if (sc->sc_ifp->if_flags & IFF_UP) 238 lance_init_locked(sc); 239 LE_UNLOCK(sc); 240 } 241 242 static void 243 lance_start(struct ifnet *ifp) 244 { 245 struct lance_softc *sc = ifp->if_softc; 246 247 LE_LOCK(sc); 248 (*sc->sc_start_locked)(sc); 249 LE_UNLOCK(sc); 250 } 251 252 static void 253 lance_stop(struct lance_softc *sc) 254 { 255 struct ifnet *ifp = sc->sc_ifp; 256 257 LE_LOCK_ASSERT(sc, MA_OWNED); 258 259 /* 260 * Mark the interface down and cancel the watchdog timer. 261 */ 262 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 263 callout_stop(&sc->sc_wdog_ch); 264 sc->sc_wdog_timer = 0; 265 266 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP); 267 } 268 269 static void 270 lance_init(void *xsc) 271 { 272 struct lance_softc *sc = (struct lance_softc *)xsc; 273 274 LE_LOCK(sc); 275 lance_init_locked(sc); 276 LE_UNLOCK(sc); 277 } 278 279 /* 280 * Initialization of interface; set up initialization block 281 * and transmit/receive descriptor rings. 282 */ 283 void 284 lance_init_locked(struct lance_softc *sc) 285 { 286 struct ifnet *ifp = sc->sc_ifp; 287 u_long a; 288 int timo; 289 290 LE_LOCK_ASSERT(sc, MA_OWNED); 291 292 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_STOP); 293 DELAY(100); 294 295 /* Newer LANCE chips have a reset register. */ 296 if (sc->sc_hwreset) 297 (*sc->sc_hwreset)(sc); 298 299 /* Set the correct byte swapping mode, etc. */ 300 (*sc->sc_wrcsr)(sc, LE_CSR3, sc->sc_conf3); 301 302 /* Set the current media. This may require the chip to be stopped. */ 303 if (sc->sc_mediachange) 304 (void)(*sc->sc_mediachange)(sc); 305 306 /* 307 * Update our private copy of the Ethernet address. 308 * We NEED the copy so we can ensure its alignment! 309 */ 310 memcpy(sc->sc_enaddr, IF_LLADDR(ifp), ETHER_ADDR_LEN); 311 312 /* Set up LANCE init block. */ 313 (*sc->sc_meminit)(sc); 314 315 /* Give LANCE the physical address of its init block. */ 316 a = sc->sc_addr + LE_INITADDR(sc); 317 (*sc->sc_wrcsr)(sc, LE_CSR1, a & 0xffff); 318 (*sc->sc_wrcsr)(sc, LE_CSR2, a >> 16); 319 320 /* Try to initialize the LANCE. */ 321 DELAY(100); 322 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INIT); 323 324 /* Wait for initialization to finish. */ 325 for (timo = 100000; timo; timo--) 326 if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON) 327 break; 328 329 if ((*sc->sc_rdcsr)(sc, LE_CSR0) & LE_C0_IDON) { 330 /* Start the LANCE. */ 331 (*sc->sc_wrcsr)(sc, LE_CSR0, LE_C0_INEA | LE_C0_STRT); 332 ifp->if_drv_flags |= IFF_DRV_RUNNING; 333 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 334 sc->sc_wdog_timer = 0; 335 callout_reset(&sc->sc_wdog_ch, hz, lance_watchdog, sc); 336 (*sc->sc_start_locked)(sc); 337 } else 338 if_printf(ifp, "controller failed to initialize\n"); 339 340 if (sc->sc_hwinit) 341 (*sc->sc_hwinit)(sc); 342 } 343 344 /* 345 * Routine to copy from mbuf chain to transmit buffer in 346 * network buffer memory. 347 */ 348 int 349 lance_put(struct lance_softc *sc, int boff, struct mbuf *m) 350 { 351 struct mbuf *n; 352 int len, tlen = 0; 353 354 LE_LOCK_ASSERT(sc, MA_OWNED); 355 356 for (; m; m = n) { 357 len = m->m_len; 358 if (len == 0) { 359 n = m_free(m); 360 m = NULL; 361 continue; 362 } 363 (*sc->sc_copytobuf)(sc, mtod(m, caddr_t), boff, len); 364 boff += len; 365 tlen += len; 366 n = m_free(m); 367 m = NULL; 368 } 369 if (tlen < LEMINSIZE) { 370 (*sc->sc_zerobuf)(sc, boff, LEMINSIZE - tlen); 371 tlen = LEMINSIZE; 372 } 373 return (tlen); 374 } 375 376 /* 377 * Pull data off an interface. 378 * Len is length of data, with local net header stripped. 379 * We copy the data into mbufs. When full cluster sized units are present 380 * we copy into clusters. 381 */ 382 struct mbuf * 383 lance_get(struct lance_softc *sc, int boff, int totlen) 384 { 385 struct ifnet *ifp = sc->sc_ifp; 386 struct mbuf *m, *m0, *newm; 387 caddr_t newdata; 388 int len; 389 390 if (totlen <= ETHER_HDR_LEN || totlen > LEBLEN - ETHER_CRC_LEN) { 391 #ifdef LEDEBUG 392 if_printf(ifp, "invalid packet size %d; dropping\n", totlen); 393 #endif 394 return (NULL); 395 } 396 397 MGETHDR(m0, M_DONTWAIT, MT_DATA); 398 if (m0 == NULL) 399 return (NULL); 400 m0->m_pkthdr.rcvif = ifp; 401 m0->m_pkthdr.len = totlen; 402 len = MHLEN; 403 m = m0; 404 405 while (totlen > 0) { 406 if (totlen >= MINCLSIZE) { 407 MCLGET(m, M_DONTWAIT); 408 if ((m->m_flags & M_EXT) == 0) 409 goto bad; 410 len = MCLBYTES; 411 } 412 413 if (m == m0) { 414 newdata = (caddr_t) 415 ALIGN(m->m_data + ETHER_HDR_LEN) - ETHER_HDR_LEN; 416 len -= newdata - m->m_data; 417 m->m_data = newdata; 418 } 419 420 m->m_len = len = min(totlen, len); 421 (*sc->sc_copyfrombuf)(sc, mtod(m, caddr_t), boff, len); 422 boff += len; 423 424 totlen -= len; 425 if (totlen > 0) { 426 MGET(newm, M_DONTWAIT, MT_DATA); 427 if (newm == 0) 428 goto bad; 429 len = MLEN; 430 m = m->m_next = newm; 431 } 432 } 433 434 return (m0); 435 436 bad: 437 m_freem(m0); 438 return (NULL); 439 } 440 441 static void 442 lance_watchdog(void *xsc) 443 { 444 struct lance_softc *sc = (struct lance_softc *)xsc; 445 struct ifnet *ifp = sc->sc_ifp; 446 447 LE_LOCK_ASSERT(sc, MA_OWNED); 448 449 if (sc->sc_wdog_timer == 0 || --sc->sc_wdog_timer != 0) { 450 callout_reset(&sc->sc_wdog_ch, hz, lance_watchdog, sc); 451 return; 452 } 453 454 if_printf(ifp, "device timeout\n"); 455 ++ifp->if_oerrors; 456 lance_init_locked(sc); 457 } 458 459 static int 460 lance_mediachange(struct ifnet *ifp) 461 { 462 struct lance_softc *sc = ifp->if_softc; 463 464 if (sc->sc_mediachange) { 465 /* 466 * For setting the port in LE_CSR15 the PCnet chips must 467 * be powered down or stopped and unlike documented may 468 * not take effect without an initialization. So don't 469 * invoke (*sc_mediachange) directly here but go through 470 * lance_init_locked(). 471 */ 472 LE_LOCK(sc); 473 lance_stop(sc); 474 lance_init_locked(sc); 475 if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) 476 (*sc->sc_start_locked)(sc); 477 LE_UNLOCK(sc); 478 } 479 return (0); 480 } 481 482 static void 483 lance_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) 484 { 485 struct lance_softc *sc = ifp->if_softc; 486 487 LE_LOCK(sc); 488 if (!(ifp->if_flags & IFF_UP)) { 489 LE_UNLOCK(sc); 490 return; 491 } 492 493 ifmr->ifm_status = IFM_AVALID; 494 if (sc->sc_flags & LE_CARRIER) 495 ifmr->ifm_status |= IFM_ACTIVE; 496 497 if (sc->sc_mediastatus) 498 (*sc->sc_mediastatus)(sc, ifmr); 499 LE_UNLOCK(sc); 500 } 501 502 /* 503 * Process an ioctl request. 504 */ 505 static int 506 lance_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 507 { 508 struct lance_softc *sc = ifp->if_softc; 509 struct ifreq *ifr = (struct ifreq *)data; 510 int error = 0; 511 512 switch (cmd) { 513 case SIOCSIFFLAGS: 514 LE_LOCK(sc); 515 if (ifp->if_flags & IFF_PROMISC) { 516 if (!(sc->sc_flags & LE_PROMISC)) { 517 sc->sc_flags |= LE_PROMISC; 518 lance_init_locked(sc); 519 } 520 } else if (sc->sc_flags & LE_PROMISC) { 521 sc->sc_flags &= ~LE_PROMISC; 522 lance_init_locked(sc); 523 } 524 525 if ((ifp->if_flags & IFF_ALLMULTI) && 526 !(sc->sc_flags & LE_ALLMULTI)) { 527 sc->sc_flags |= LE_ALLMULTI; 528 lance_init_locked(sc); 529 } else if (!(ifp->if_flags & IFF_ALLMULTI) && 530 (sc->sc_flags & LE_ALLMULTI)) { 531 sc->sc_flags &= ~LE_ALLMULTI; 532 lance_init_locked(sc); 533 } 534 535 if (!(ifp->if_flags & IFF_UP) && 536 ifp->if_drv_flags & IFF_DRV_RUNNING) { 537 /* 538 * If interface is marked down and it is running, then 539 * stop it. 540 */ 541 lance_stop(sc); 542 } else if (ifp->if_flags & IFF_UP && 543 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 544 /* 545 * If interface is marked up and it is stopped, then 546 * start it. 547 */ 548 lance_init_locked(sc); 549 } 550 #ifdef LEDEBUG 551 if (ifp->if_flags & IFF_DEBUG) 552 sc->sc_flags |= LE_DEBUG; 553 else 554 sc->sc_flags &= ~LE_DEBUG; 555 #endif 556 LE_UNLOCK(sc); 557 break; 558 559 case SIOCADDMULTI: 560 case SIOCDELMULTI: 561 /* 562 * Multicast list has changed; set the hardware filter 563 * accordingly. 564 */ 565 LE_LOCK(sc); 566 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 567 lance_init_locked(sc); 568 LE_UNLOCK(sc); 569 break; 570 571 case SIOCGIFMEDIA: 572 case SIOCSIFMEDIA: 573 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 574 break; 575 576 default: 577 error = ether_ioctl(ifp, cmd, data); 578 break; 579 } 580 581 return (error); 582 } 583 584 /* 585 * Set up the logical address filter. 586 */ 587 void 588 lance_setladrf(struct lance_softc *sc, uint16_t *af) 589 { 590 struct ifnet *ifp = sc->sc_ifp; 591 struct ifmultiaddr *ifma; 592 uint32_t crc; 593 594 /* 595 * Set up multicast address filter by passing all multicast addresses 596 * through a crc generator, and then using the high order 6 bits as an 597 * index into the 64 bit logical address filter. The high order bit 598 * selects the word, while the rest of the bits select the bit within 599 * the word. 600 */ 601 602 if (ifp->if_flags & IFF_PROMISC || sc->sc_flags & LE_ALLMULTI) { 603 af[0] = af[1] = af[2] = af[3] = 0xffff; 604 return; 605 } 606 607 af[0] = af[1] = af[2] = af[3] = 0x0000; 608 IF_ADDR_LOCK(ifp); 609 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 610 if (ifma->ifma_addr->sa_family != AF_LINK) 611 continue; 612 613 crc = ether_crc32_le(LLADDR((struct sockaddr_dl *) 614 ifma->ifma_addr), ETHER_ADDR_LEN); 615 616 /* Just want the 6 most significant bits. */ 617 crc >>= 26; 618 619 /* Set the corresponding bit in the filter. */ 620 af[crc >> 4] |= LE_HTOLE16(1 << (crc & 0xf)); 621 } 622 IF_ADDR_UNLOCK(ifp); 623 } 624 625 /* 626 * Routines for accessing the transmit and receive buffers. 627 * The various CPU and adapter configurations supported by this 628 * driver require three different access methods for buffers 629 * and descriptors: 630 * (1) contig (contiguous data; no padding), 631 * (2) gap2 (two bytes of data followed by two bytes of padding), 632 * (3) gap16 (16 bytes of data followed by 16 bytes of padding). 633 */ 634 635 /* 636 * contig: contiguous data with no padding. 637 * 638 * Buffers may have any alignment. 639 */ 640 641 void 642 lance_copytobuf_contig(struct lance_softc *sc, void *from, int boff, int len) 643 { 644 volatile caddr_t buf = sc->sc_mem; 645 646 /* 647 * Just call memcpy() to do the work. 648 */ 649 memcpy(buf + boff, from, len); 650 } 651 652 void 653 lance_copyfrombuf_contig(struct lance_softc *sc, void *to, int boff, int len) 654 { 655 volatile caddr_t buf = sc->sc_mem; 656 657 /* 658 * Just call memcpy() to do the work. 659 */ 660 memcpy(to, buf + boff, len); 661 } 662 663 void 664 lance_zerobuf_contig(struct lance_softc *sc, int boff, int len) 665 { 666 volatile caddr_t buf = sc->sc_mem; 667 668 /* 669 * Just let memset() do the work 670 */ 671 memset(buf + boff, 0, len); 672 } 673 674 #if 0 675 /* 676 * Examples only; duplicate these and tweak (if necessary) in 677 * machine-specific front-ends. 678 */ 679 680 /* 681 * gap2: two bytes of data followed by two bytes of pad. 682 * 683 * Buffers must be 4-byte aligned. The code doesn't worry about 684 * doing an extra byte. 685 */ 686 687 static void 688 lance_copytobuf_gap2(struct lance_softc *sc, void *fromv, int boff, int len) 689 { 690 volatile caddr_t buf = sc->sc_mem; 691 caddr_t from = fromv; 692 volatile uint16_t *bptr; 693 694 if (boff & 0x1) { 695 /* Handle unaligned first byte. */ 696 bptr = ((volatile uint16_t *)buf) + (boff - 1); 697 *bptr = (*from++ << 8) | (*bptr & 0xff); 698 bptr += 2; 699 len--; 700 } else 701 bptr = ((volatile uint16_t *)buf) + boff; 702 while (len > 1) { 703 *bptr = (from[1] << 8) | (from[0] & 0xff); 704 bptr += 2; 705 from += 2; 706 len -= 2; 707 } 708 if (len == 1) 709 *bptr = (uint16_t)*from; 710 } 711 712 static void 713 lance_copyfrombuf_gap2(struct lance_softc *sc, void *tov, int boff, int len) 714 { 715 volatile caddr_t buf = sc->sc_mem; 716 caddr_t to = tov; 717 volatile uint16_t *bptr; 718 uint16_t tmp; 719 720 if (boff & 0x1) { 721 /* Handle unaligned first byte. */ 722 bptr = ((volatile uint16_t *)buf) + (boff - 1); 723 *to++ = (*bptr >> 8) & 0xff; 724 bptr += 2; 725 len--; 726 } else 727 bptr = ((volatile uint16_t *)buf) + boff; 728 while (len > 1) { 729 tmp = *bptr; 730 *to++ = tmp & 0xff; 731 *to++ = (tmp >> 8) & 0xff; 732 bptr += 2; 733 len -= 2; 734 } 735 if (len == 1) 736 *to = *bptr & 0xff; 737 } 738 739 static void 740 lance_zerobuf_gap2(struct lance_softc *sc, int boff, int len) 741 { 742 volatile caddr_t buf = sc->sc_mem; 743 volatile uint16_t *bptr; 744 745 if ((unsigned)boff & 0x1) { 746 bptr = ((volatile uint16_t *)buf) + (boff - 1); 747 *bptr &= 0xff; 748 bptr += 2; 749 len--; 750 } else 751 bptr = ((volatile uint16_t *)buf) + boff; 752 while (len > 0) { 753 *bptr = 0; 754 bptr += 2; 755 len -= 2; 756 } 757 } 758 759 /* 760 * gap16: 16 bytes of data followed by 16 bytes of pad. 761 * 762 * Buffers must be 32-byte aligned. 763 */ 764 765 static void 766 lance_copytobuf_gap16(struct lance_softc *sc, void *fromv, int boff, int len) 767 { 768 volatile caddr_t buf = sc->sc_mem; 769 caddr_t bptr, from = fromv; 770 int xfer; 771 772 bptr = buf + ((boff << 1) & ~0x1f); 773 boff &= 0xf; 774 xfer = min(len, 16 - boff); 775 while (len > 0) { 776 memcpy(bptr + boff, from, xfer); 777 from += xfer; 778 bptr += 32; 779 boff = 0; 780 len -= xfer; 781 xfer = min(len, 16); 782 } 783 } 784 785 static void 786 lance_copyfrombuf_gap16(struct lance_softc *sc, void *tov, int boff, int len) 787 { 788 volatile caddr_t buf = sc->sc_mem; 789 caddr_t bptr, to = tov; 790 int xfer; 791 792 bptr = buf + ((boff << 1) & ~0x1f); 793 boff &= 0xf; 794 xfer = min(len, 16 - boff); 795 while (len > 0) { 796 memcpy(to, bptr + boff, xfer); 797 to += xfer; 798 bptr += 32; 799 boff = 0; 800 len -= xfer; 801 xfer = min(len, 16); 802 } 803 } 804 805 static void 806 lance_zerobuf_gap16(struct lance_softc *sc, int boff, int len) 807 { 808 volatile caddr_t buf = sc->sc_mem; 809 caddr_t bptr; 810 int xfer; 811 812 bptr = buf + ((boff << 1) & ~0x1f); 813 boff &= 0xf; 814 xfer = min(len, 16 - boff); 815 while (len > 0) { 816 memset(bptr + boff, 0, xfer); 817 bptr += 32; 818 boff = 0; 819 len -= xfer; 820 xfer = min(len, 16); 821 } 822 } 823 #endif /* Example only */
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