sgec.c revision 1.29
1 /* $NetBSD: sgec.c,v 1.29 2007/04/13 04:16:45 matt Exp $ */ 2 /* 3 * Copyright (c) 1999 Ludd, University of Lule}, Sweden. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed at Ludd, University of 16 * Lule}, Sweden and its contributors. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Driver for the SGEC (Second Generation Ethernet Controller), sitting 34 * on for example the VAX 4000/300 (KA670). 35 * 36 * The SGEC looks like a mixture of the DEQNA and the TULIP. Fun toy. 37 * 38 * Even though the chip is capable to use virtual addresses (read the 39 * System Page Table directly) this driver doesn't do so, and there 40 * is no benefit in doing it either in NetBSD of today. 41 * 42 * Things that is still to do: 43 * Collect statistics. 44 * Use imperfect filtering when many multicast addresses. 45 */ 46 47 #include <sys/cdefs.h> 48 __KERNEL_RCSID(0, "$NetBSD: sgec.c,v 1.29 2007/04/13 04:16:45 matt Exp $"); 49 50 #include "opt_inet.h" 51 #include "bpfilter.h" 52 53 #include <sys/param.h> 54 #include <sys/mbuf.h> 55 #include <sys/socket.h> 56 #include <sys/device.h> 57 #include <sys/systm.h> 58 #include <sys/sockio.h> 59 60 #include <uvm/uvm_extern.h> 61 62 #include <net/if.h> 63 #include <net/if_ether.h> 64 #include <net/if_dl.h> 65 66 #include <netinet/in.h> 67 #include <netinet/if_inarp.h> 68 69 #if NBPFILTER > 0 70 #include <net/bpf.h> 71 #include <net/bpfdesc.h> 72 #endif 73 74 #include <machine/bus.h> 75 76 #include <dev/ic/sgecreg.h> 77 #include <dev/ic/sgecvar.h> 78 79 static void zeinit(struct ze_softc *); 80 static void zestart(struct ifnet *); 81 static int zeioctl(struct ifnet *, u_long, void *); 82 static int ze_add_rxbuf(struct ze_softc *, int); 83 static void ze_setup(struct ze_softc *); 84 static void zetimeout(struct ifnet *); 85 static int zereset(struct ze_softc *); 86 87 #define ZE_WCSR(csr, val) \ 88 bus_space_write_4(sc->sc_iot, sc->sc_ioh, csr, val) 89 #define ZE_RCSR(csr) \ 90 bus_space_read_4(sc->sc_iot, sc->sc_ioh, csr) 91 92 /* 93 * Interface exists: make available by filling in network interface 94 * record. System will initialize the interface when it is ready 95 * to accept packets. 96 */ 97 void 98 sgec_attach(sc) 99 struct ze_softc *sc; 100 { 101 struct ifnet *ifp = (struct ifnet *)&sc->sc_if; 102 struct ze_tdes *tp; 103 struct ze_rdes *rp; 104 bus_dma_segment_t seg; 105 int i, rseg, error; 106 107 /* 108 * Allocate DMA safe memory for descriptors and setup memory. 109 */ 110 if ((error = bus_dmamem_alloc(sc->sc_dmat, 111 sizeof(struct ze_cdata), PAGE_SIZE, 0, &seg, 1, &rseg, 112 BUS_DMA_NOWAIT)) != 0) { 113 printf(": unable to allocate control data, error = %d\n", 114 error); 115 goto fail_0; 116 } 117 118 if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg, 119 sizeof(struct ze_cdata), (void **)&sc->sc_zedata, 120 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 121 printf(": unable to map control data, error = %d\n", error); 122 goto fail_1; 123 } 124 125 if ((error = bus_dmamap_create(sc->sc_dmat, 126 sizeof(struct ze_cdata), 1, 127 sizeof(struct ze_cdata), 0, BUS_DMA_NOWAIT, 128 &sc->sc_cmap)) != 0) { 129 printf(": unable to create control data DMA map, error = %d\n", 130 error); 131 goto fail_2; 132 } 133 134 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_cmap, 135 sc->sc_zedata, sizeof(struct ze_cdata), NULL, 136 BUS_DMA_NOWAIT)) != 0) { 137 printf(": unable to load control data DMA map, error = %d\n", 138 error); 139 goto fail_3; 140 } 141 142 /* 143 * Zero the newly allocated memory. 144 */ 145 memset(sc->sc_zedata, 0, sizeof(struct ze_cdata)); 146 /* 147 * Create the transmit descriptor DMA maps. 148 */ 149 for (i = 0; i < TXDESCS; i++) { 150 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 151 TXDESCS - 1, MCLBYTES, 0, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW, 152 &sc->sc_xmtmap[i]))) { 153 printf(": unable to create tx DMA map %d, error = %d\n", 154 i, error); 155 goto fail_4; 156 } 157 } 158 159 /* 160 * Create receive buffer DMA maps. 161 */ 162 for (i = 0; i < RXDESCS; i++) { 163 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 1, 164 MCLBYTES, 0, BUS_DMA_NOWAIT, 165 &sc->sc_rcvmap[i]))) { 166 printf(": unable to create rx DMA map %d, error = %d\n", 167 i, error); 168 goto fail_5; 169 } 170 } 171 /* 172 * Pre-allocate the receive buffers. 173 */ 174 for (i = 0; i < RXDESCS; i++) { 175 if ((error = ze_add_rxbuf(sc, i)) != 0) { 176 printf(": unable to allocate or map rx buffer %d\n," 177 " error = %d\n", i, error); 178 goto fail_6; 179 } 180 } 181 182 /* For vmstat -i 183 */ 184 evcnt_attach_dynamic(&sc->sc_intrcnt, EVCNT_TYPE_INTR, NULL, 185 sc->sc_dev.dv_xname, "intr"); 186 187 /* 188 * Create ring loops of the buffer chains. 189 * This is only done once. 190 */ 191 sc->sc_pzedata = (struct ze_cdata *)sc->sc_cmap->dm_segs[0].ds_addr; 192 193 rp = sc->sc_zedata->zc_recv; 194 rp[RXDESCS].ze_framelen = ZE_FRAMELEN_OW; 195 rp[RXDESCS].ze_rdes1 = ZE_RDES1_CA; 196 rp[RXDESCS].ze_bufaddr = (char *)sc->sc_pzedata->zc_recv; 197 198 tp = sc->sc_zedata->zc_xmit; 199 tp[TXDESCS].ze_tdr = ZE_TDR_OW; 200 tp[TXDESCS].ze_tdes1 = ZE_TDES1_CA; 201 tp[TXDESCS].ze_bufaddr = (char *)sc->sc_pzedata->zc_xmit; 202 203 if (zereset(sc)) 204 return; 205 206 strcpy(ifp->if_xname, sc->sc_dev.dv_xname); 207 ifp->if_softc = sc; 208 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 209 ifp->if_start = zestart; 210 ifp->if_ioctl = zeioctl; 211 ifp->if_watchdog = zetimeout; 212 IFQ_SET_READY(&ifp->if_snd); 213 214 /* 215 * Attach the interface. 216 */ 217 if_attach(ifp); 218 ether_ifattach(ifp, sc->sc_enaddr); 219 220 printf("\n%s: hardware address %s\n", sc->sc_dev.dv_xname, 221 ether_sprintf(sc->sc_enaddr)); 222 return; 223 224 /* 225 * Free any resources we've allocated during the failed attach 226 * attempt. Do this in reverse order and fall through. 227 */ 228 fail_6: 229 for (i = 0; i < RXDESCS; i++) { 230 if (sc->sc_rxmbuf[i] != NULL) { 231 bus_dmamap_unload(sc->sc_dmat, sc->sc_xmtmap[i]); 232 m_freem(sc->sc_rxmbuf[i]); 233 } 234 } 235 fail_5: 236 for (i = 0; i < RXDESCS; i++) { 237 if (sc->sc_xmtmap[i] != NULL) 238 bus_dmamap_destroy(sc->sc_dmat, sc->sc_xmtmap[i]); 239 } 240 fail_4: 241 for (i = 0; i < TXDESCS; i++) { 242 if (sc->sc_rcvmap[i] != NULL) 243 bus_dmamap_destroy(sc->sc_dmat, sc->sc_rcvmap[i]); 244 } 245 bus_dmamap_unload(sc->sc_dmat, sc->sc_cmap); 246 fail_3: 247 bus_dmamap_destroy(sc->sc_dmat, sc->sc_cmap); 248 fail_2: 249 bus_dmamem_unmap(sc->sc_dmat, (void *)sc->sc_zedata, 250 sizeof(struct ze_cdata)); 251 fail_1: 252 bus_dmamem_free(sc->sc_dmat, &seg, rseg); 253 fail_0: 254 return; 255 } 256 257 /* 258 * Initialization of interface. 259 */ 260 void 261 zeinit(sc) 262 struct ze_softc *sc; 263 { 264 struct ifnet *ifp = (struct ifnet *)&sc->sc_if; 265 struct ze_cdata *zc = sc->sc_zedata; 266 int i; 267 268 /* 269 * Reset the interface. 270 */ 271 if (zereset(sc)) 272 return; 273 274 sc->sc_nexttx = sc->sc_inq = sc->sc_lastack = 0; 275 /* 276 * Release and init transmit descriptors. 277 */ 278 for (i = 0; i < TXDESCS; i++) { 279 if (sc->sc_xmtmap[i]->dm_nsegs > 0) 280 bus_dmamap_unload(sc->sc_dmat, sc->sc_xmtmap[i]); 281 if (sc->sc_txmbuf[i]) { 282 m_freem(sc->sc_txmbuf[i]); 283 sc->sc_txmbuf[i] = 0; 284 } 285 zc->zc_xmit[i].ze_tdr = 0; /* Clear valid bit */ 286 } 287 288 289 /* 290 * Init receive descriptors. 291 */ 292 for (i = 0; i < RXDESCS; i++) 293 zc->zc_recv[i].ze_framelen = ZE_FRAMELEN_OW; 294 sc->sc_nextrx = 0; 295 296 ZE_WCSR(ZE_CSR6, ZE_NICSR6_IE|ZE_NICSR6_BL_8|ZE_NICSR6_ST| 297 ZE_NICSR6_SR|ZE_NICSR6_DC); 298 299 ifp->if_flags |= IFF_RUNNING; 300 ifp->if_flags &= ~IFF_OACTIVE; 301 302 /* 303 * Send a setup frame. 304 * This will start the transmit machinery as well. 305 */ 306 ze_setup(sc); 307 308 } 309 310 /* 311 * Start output on interface. 312 */ 313 void 314 zestart(ifp) 315 struct ifnet *ifp; 316 { 317 struct ze_softc *sc = ifp->if_softc; 318 struct ze_cdata *zc = sc->sc_zedata; 319 paddr_t buffer; 320 struct mbuf *m; 321 int nexttx, len, i, totlen, error; 322 int old_inq = sc->sc_inq; 323 short orword; 324 bus_dmamap_t map; 325 326 while (sc->sc_inq < (TXDESCS - 1)) { 327 328 if (sc->sc_setup) { 329 ze_setup(sc); 330 continue; 331 } 332 nexttx = sc->sc_nexttx; 333 IFQ_POLL(&sc->sc_if.if_snd, m); 334 if (m == 0) 335 goto out; 336 /* 337 * Count number of mbufs in chain. 338 * Always do DMA directly from mbufs, therefore the transmit 339 * ring is really big. 340 */ 341 map = sc->sc_xmtmap[nexttx]; 342 error = bus_dmamap_load_mbuf(sc->sc_dmat, map, m, 343 BUS_DMA_WRITE); 344 if (error) { 345 printf("zestart: load_mbuf failed: %d", error); 346 goto out; 347 } 348 349 if (map->dm_nsegs >= TXDESCS) 350 panic("zestart"); /* XXX */ 351 352 if ((map->dm_nsegs + sc->sc_inq) >= (TXDESCS - 1)) { 353 bus_dmamap_unload(sc->sc_dmat, map); 354 ifp->if_flags |= IFF_OACTIVE; 355 goto out; 356 } 357 358 /* 359 * m now points to a mbuf chain that can be loaded. 360 * Loop around and set it. 361 */ 362 totlen = 0; 363 orword = ZE_TDES1_FS; 364 for (i = 0; i < map->dm_nsegs; i++) { 365 buffer = map->dm_segs[i].ds_addr; 366 len = map->dm_segs[i].ds_len; 367 368 if (len == 0) 369 continue; 370 371 totlen += len; 372 /* Word alignment calc */ 373 if (totlen == m->m_pkthdr.len) { 374 orword |= ZE_TDES1_LS | ZE_TDES1_IC; 375 sc->sc_txmbuf[nexttx] = m; 376 } 377 zc->zc_xmit[nexttx].ze_bufsize = len; 378 zc->zc_xmit[nexttx].ze_bufaddr = (char *)buffer; 379 zc->zc_xmit[nexttx].ze_tdes1 = orword; 380 zc->zc_xmit[nexttx].ze_tdr = ZE_TDR_OW; 381 382 if (++nexttx == TXDESCS) 383 nexttx = 0; 384 orword = 0; 385 } 386 387 sc->sc_inq += map->dm_nsegs; 388 389 IFQ_DEQUEUE(&ifp->if_snd, m); 390 #ifdef DIAGNOSTIC 391 if (totlen != m->m_pkthdr.len) 392 panic("zestart: len fault"); 393 #endif 394 395 /* 396 * Kick off the transmit logic, if it is stopped. 397 */ 398 if ((ZE_RCSR(ZE_CSR5) & ZE_NICSR5_TS) != ZE_NICSR5_TS_RUN) 399 ZE_WCSR(ZE_CSR1, -1); 400 sc->sc_nexttx = nexttx; 401 } 402 if (sc->sc_inq == (TXDESCS - 1)) 403 ifp->if_flags |= IFF_OACTIVE; 404 405 out: if (old_inq < sc->sc_inq) 406 ifp->if_timer = 5; /* If transmit logic dies */ 407 } 408 409 int 410 sgec_intr(sc) 411 struct ze_softc *sc; 412 { 413 struct ze_cdata *zc = sc->sc_zedata; 414 struct ifnet *ifp = &sc->sc_if; 415 struct mbuf *m; 416 int csr, len; 417 418 csr = ZE_RCSR(ZE_CSR5); 419 if ((csr & ZE_NICSR5_IS) == 0) /* Wasn't we */ 420 return 0; 421 ZE_WCSR(ZE_CSR5, csr); 422 423 if (csr & ZE_NICSR5_RI) { 424 while ((zc->zc_recv[sc->sc_nextrx].ze_framelen & 425 ZE_FRAMELEN_OW) == 0) { 426 427 ifp->if_ipackets++; 428 m = sc->sc_rxmbuf[sc->sc_nextrx]; 429 len = zc->zc_recv[sc->sc_nextrx].ze_framelen; 430 ze_add_rxbuf(sc, sc->sc_nextrx); 431 if (++sc->sc_nextrx == RXDESCS) 432 sc->sc_nextrx = 0; 433 if (len < ETHER_MIN_LEN) { 434 ifp->if_ierrors++; 435 m_freem(m); 436 } else { 437 m->m_pkthdr.rcvif = ifp; 438 m->m_pkthdr.len = m->m_len = 439 len - ETHER_CRC_LEN; 440 #if NBPFILTER > 0 441 if (ifp->if_bpf) 442 bpf_mtap(ifp->if_bpf, m); 443 #endif 444 (*ifp->if_input)(ifp, m); 445 } 446 } 447 } 448 449 if (csr & ZE_NICSR5_TI) { 450 int lastack = sc->sc_lastack; 451 while ((zc->zc_xmit[lastack].ze_tdr & ZE_TDR_OW) == 0) { 452 bus_dmamap_t map; 453 int nlastack; 454 455 if (lastack == sc->sc_nexttx) 456 break; 457 458 if ((zc->zc_xmit[lastack].ze_tdes1 & ZE_TDES1_DT) == 459 ZE_TDES1_DT_SETUP) { 460 if (++lastack == TXDESCS) 461 lastack = 0; 462 sc->sc_inq--; 463 continue; 464 } 465 466 KASSERT(zc->zc_xmit[lastack].ze_tdes1 & ZE_TDES1_FS); 467 map = sc->sc_xmtmap[lastack]; 468 KASSERT(map->dm_nsegs > 0); 469 nlastack = (lastack + map->dm_nsegs - 1) % TXDESCS; 470 if (zc->zc_xmit[nlastack].ze_tdr & ZE_TDR_OW) 471 break; 472 lastack = nlastack; 473 sc->sc_inq -= map->dm_nsegs; 474 KASSERT(zc->zc_xmit[lastack].ze_tdes1 & ZE_TDES1_LS); 475 ifp->if_opackets++; 476 bus_dmamap_unload(sc->sc_dmat, map); 477 KASSERT(sc->sc_txmbuf[lastack]); 478 #if NBPFILTER > 0 479 if (ifp->if_bpf) 480 bpf_mtap(ifp->if_bpf, sc->sc_txmbuf[lastack]); 481 #endif 482 m_freem(sc->sc_txmbuf[lastack]); 483 sc->sc_txmbuf[lastack] = 0; 484 if (++lastack == TXDESCS) 485 lastack = 0; 486 } 487 sc->sc_lastack = lastack; 488 if (sc->sc_inq == 0) 489 ifp->if_timer = 0; 490 ifp->if_flags &= ~IFF_OACTIVE; 491 zestart(ifp); /* Put in more in queue */ 492 } 493 return 1; 494 } 495 496 /* 497 * Process an ioctl request. 498 */ 499 int 500 zeioctl(ifp, cmd, data) 501 struct ifnet *ifp; 502 u_long cmd; 503 void *data; 504 { 505 struct ze_softc *sc = ifp->if_softc; 506 struct ifreq *ifr = (struct ifreq *)data; 507 struct ifaddr *ifa = (struct ifaddr *)data; 508 int s = splnet(), error = 0; 509 510 switch (cmd) { 511 512 case SIOCSIFADDR: 513 ifp->if_flags |= IFF_UP; 514 switch(ifa->ifa_addr->sa_family) { 515 #ifdef INET 516 case AF_INET: 517 zeinit(sc); 518 arp_ifinit(ifp, ifa); 519 break; 520 #endif 521 } 522 break; 523 524 case SIOCSIFFLAGS: 525 if ((ifp->if_flags & IFF_UP) == 0 && 526 (ifp->if_flags & IFF_RUNNING) != 0) { 527 /* 528 * If interface is marked down and it is running, 529 * stop it. (by disabling receive mechanism). 530 */ 531 ZE_WCSR(ZE_CSR6, ZE_RCSR(ZE_CSR6) & 532 ~(ZE_NICSR6_ST|ZE_NICSR6_SR)); 533 ifp->if_flags &= ~IFF_RUNNING; 534 } else if ((ifp->if_flags & IFF_UP) != 0 && 535 (ifp->if_flags & IFF_RUNNING) == 0) { 536 /* 537 * If interface it marked up and it is stopped, then 538 * start it. 539 */ 540 zeinit(sc); 541 } else if ((ifp->if_flags & IFF_UP) != 0) { 542 /* 543 * Send a new setup packet to match any new changes. 544 * (Like IFF_PROMISC etc) 545 */ 546 ze_setup(sc); 547 } 548 break; 549 550 case SIOCADDMULTI: 551 case SIOCDELMULTI: 552 /* 553 * Update our multicast list. 554 */ 555 error = (cmd == SIOCADDMULTI) ? 556 ether_addmulti(ifr, &sc->sc_ec): 557 ether_delmulti(ifr, &sc->sc_ec); 558 559 if (error == ENETRESET) { 560 /* 561 * Multicast list has changed; set the hardware filter 562 * accordingly. 563 */ 564 if (ifp->if_flags & IFF_RUNNING) 565 ze_setup(sc); 566 error = 0; 567 } 568 break; 569 570 default: 571 error = EINVAL; 572 573 } 574 splx(s); 575 return (error); 576 } 577 578 /* 579 * Add a receive buffer to the indicated descriptor. 580 */ 581 int 582 ze_add_rxbuf(sc, i) 583 struct ze_softc *sc; 584 int i; 585 { 586 struct mbuf *m; 587 struct ze_rdes *rp; 588 int error; 589 590 MGETHDR(m, M_DONTWAIT, MT_DATA); 591 if (m == NULL) 592 return (ENOBUFS); 593 594 MCLAIM(m, &sc->sc_ec.ec_rx_mowner); 595 MCLGET(m, M_DONTWAIT); 596 if ((m->m_flags & M_EXT) == 0) { 597 m_freem(m); 598 return (ENOBUFS); 599 } 600 601 if (sc->sc_rxmbuf[i] != NULL) 602 bus_dmamap_unload(sc->sc_dmat, sc->sc_rcvmap[i]); 603 604 error = bus_dmamap_load(sc->sc_dmat, sc->sc_rcvmap[i], 605 m->m_ext.ext_buf, m->m_ext.ext_size, NULL, 606 BUS_DMA_READ|BUS_DMA_NOWAIT); 607 if (error) 608 panic("%s: can't load rx DMA map %d, error = %d", 609 sc->sc_dev.dv_xname, i, error); 610 sc->sc_rxmbuf[i] = m; 611 612 bus_dmamap_sync(sc->sc_dmat, sc->sc_rcvmap[i], 0, 613 sc->sc_rcvmap[i]->dm_mapsize, BUS_DMASYNC_PREREAD); 614 615 /* 616 * We know that the mbuf cluster is page aligned. Also, be sure 617 * that the IP header will be longword aligned. 618 */ 619 m->m_data += 2; 620 rp = &sc->sc_zedata->zc_recv[i]; 621 rp->ze_bufsize = (m->m_ext.ext_size - 2); 622 rp->ze_bufaddr = (char *)sc->sc_rcvmap[i]->dm_segs[0].ds_addr + 2; 623 rp->ze_framelen = ZE_FRAMELEN_OW; 624 625 return (0); 626 } 627 628 /* 629 * Create a setup packet and put in queue for sending. 630 */ 631 void 632 ze_setup(sc) 633 struct ze_softc *sc; 634 { 635 struct ether_multi *enm; 636 struct ether_multistep step; 637 struct ze_cdata *zc = sc->sc_zedata; 638 struct ifnet *ifp = &sc->sc_if; 639 u_int8_t *enaddr = LLADDR(ifp->if_sadl); 640 int j, idx, reg; 641 642 if (sc->sc_inq == (TXDESCS - 1)) { 643 sc->sc_setup = 1; 644 return; 645 } 646 sc->sc_setup = 0; 647 /* 648 * Init the setup packet with valid info. 649 */ 650 memset(zc->zc_setup, 0xff, sizeof(zc->zc_setup)); /* Broadcast */ 651 memcpy(zc->zc_setup, enaddr, ETHER_ADDR_LEN); 652 653 /* 654 * Multicast handling. The SGEC can handle up to 16 direct 655 * ethernet addresses. 656 */ 657 j = 16; 658 ifp->if_flags &= ~IFF_ALLMULTI; 659 ETHER_FIRST_MULTI(step, &sc->sc_ec, enm); 660 while (enm != NULL) { 661 if (memcmp(enm->enm_addrlo, enm->enm_addrhi, 6)) { 662 ifp->if_flags |= IFF_ALLMULTI; 663 break; 664 } 665 memcpy(&zc->zc_setup[j], enm->enm_addrlo, ETHER_ADDR_LEN); 666 j += 8; 667 ETHER_NEXT_MULTI(step, enm); 668 if ((enm != NULL)&& (j == 128)) { 669 ifp->if_flags |= IFF_ALLMULTI; 670 break; 671 } 672 } 673 674 /* 675 * ALLMULTI implies PROMISC in this driver. 676 */ 677 if (ifp->if_flags & IFF_ALLMULTI) 678 ifp->if_flags |= IFF_PROMISC; 679 else if (ifp->if_pcount == 0) 680 ifp->if_flags &= ~IFF_PROMISC; 681 682 /* 683 * Fiddle with the receive logic. 684 */ 685 reg = ZE_RCSR(ZE_CSR6); 686 DELAY(10); 687 ZE_WCSR(ZE_CSR6, reg & ~ZE_NICSR6_SR); /* Stop rx */ 688 reg &= ~ZE_NICSR6_AF; 689 if (ifp->if_flags & IFF_PROMISC) 690 reg |= ZE_NICSR6_AF_PROM; 691 else if (ifp->if_flags & IFF_ALLMULTI) 692 reg |= ZE_NICSR6_AF_ALLM; 693 DELAY(10); 694 ZE_WCSR(ZE_CSR6, reg); 695 /* 696 * Only send a setup packet if needed. 697 */ 698 if ((ifp->if_flags & (IFF_PROMISC|IFF_ALLMULTI)) == 0) { 699 idx = sc->sc_nexttx; 700 zc->zc_xmit[idx].ze_tdes1 = ZE_TDES1_DT_SETUP; 701 zc->zc_xmit[idx].ze_bufsize = 128; 702 zc->zc_xmit[idx].ze_bufaddr = sc->sc_pzedata->zc_setup; 703 zc->zc_xmit[idx].ze_tdr = ZE_TDR_OW; 704 705 if ((ZE_RCSR(ZE_CSR5) & ZE_NICSR5_TS) != ZE_NICSR5_TS_RUN) 706 ZE_WCSR(ZE_CSR1, -1); 707 708 sc->sc_inq++; 709 if (++sc->sc_nexttx == TXDESCS) 710 sc->sc_nexttx = 0; 711 } 712 } 713 714 /* 715 * Check for dead transmit logic. 716 */ 717 void 718 zetimeout(ifp) 719 struct ifnet *ifp; 720 { 721 struct ze_softc *sc = ifp->if_softc; 722 723 if (sc->sc_inq == 0) 724 return; 725 726 printf("%s: xmit logic died, resetting...\n", sc->sc_dev.dv_xname); 727 /* 728 * Do a reset of interface, to get it going again. 729 * Will it work by just restart the transmit logic? 730 */ 731 zeinit(sc); 732 } 733 734 /* 735 * Reset chip: 736 * Set/reset the reset flag. 737 * Write interrupt vector. 738 * Write ring buffer addresses. 739 * Write SBR. 740 */ 741 int 742 zereset(sc) 743 struct ze_softc *sc; 744 { 745 int reg, i; 746 747 ZE_WCSR(ZE_CSR6, ZE_NICSR6_RE); 748 DELAY(50000); 749 if (ZE_RCSR(ZE_CSR6) & ZE_NICSR5_SF) { 750 printf("%s: selftest failed\n", sc->sc_dev.dv_xname); 751 return 1; 752 } 753 754 /* 755 * Get the vector that were set at match time, and remember it. 756 * WHICH VECTOR TO USE? Take one unused. XXX 757 * Funny way to set vector described in the programmers manual. 758 */ 759 reg = ZE_NICSR0_IPL14 | sc->sc_intvec | 0x1fff0003; /* SYNC/ASYNC??? */ 760 i = 10; 761 do { 762 if (i-- == 0) { 763 printf("Failing SGEC CSR0 init\n"); 764 return 1; 765 } 766 ZE_WCSR(ZE_CSR0, reg); 767 } while (ZE_RCSR(ZE_CSR0) != reg); 768 769 ZE_WCSR(ZE_CSR3, (vaddr_t)sc->sc_pzedata->zc_recv); 770 ZE_WCSR(ZE_CSR4, (vaddr_t)sc->sc_pzedata->zc_xmit); 771 return 0; 772 } 773
Indexes created Fri Sep 26 08:10:20 GMT 2025