1 /*- 2 * Copyright (c) 1992 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Ralph Campbell and Rick Macklem. 7 * 8 * %sccs.include.redist.c% 9 * 10 * @(#)if_le.c 7.10 (Berkeley) 05/09/93 11 */ 12 13 #include <le.h> 14 #if NLE > 0 15 16 #include <bpfilter.h> 17 18 /* 19 * AMD 7990 LANCE 20 * 21 * This driver will generate and accept trailer encapsulated packets even 22 * though it buys us nothing. The motivation was to avoid incompatibilities 23 * with VAXen, SUNs, and others that handle and benefit from them. 24 * This reasoning is dubious. 25 */ 26 #include <sys/param.h> 27 #include <sys/proc.h> 28 #include <sys/systm.h> 29 #include <sys/mbuf.h> 30 #include <sys/buf.h> 31 #include <sys/protosw.h> 32 #include <sys/socket.h> 33 #include <sys/syslog.h> 34 #include <sys/ioctl.h> 35 #include <sys/errno.h> 36 37 #include <net/if.h> 38 #include <net/netisr.h> 39 #include <net/route.h> 40 41 #ifdef INET 42 #include <netinet/in.h> 43 #include <netinet/in_systm.h> 44 #include <netinet/in_var.h> 45 #include <netinet/ip.h> 46 #include <netinet/if_ether.h> 47 #endif 48 49 #ifdef NS 50 #include <netns/ns.h> 51 #include <netns/ns_if.h> 52 #endif 53 54 #if defined (CCITT) && defined (LLC) 55 #include <sys/socketvar.h> 56 #include <netccitt/x25.h> 57 extern llc_ctlinput(), cons_rtrequest(); 58 #endif 59 60 #include <machine/machConst.h> 61 62 #include <pmax/pmax/pmaxtype.h> 63 #include <pmax/pmax/kn01.h> 64 #include <pmax/pmax/kmin.h> 65 #include <pmax/pmax/asic.h> 66 67 #include <pmax/dev/device.h> 68 #include <pmax/dev/if_lereg.h> 69 70 #if NBPFILTER > 0 71 #include <net/bpf.h> 72 #include <net/bpfdesc.h> 73 #endif 74 75 int leprobe(); 76 void leintr(); 77 struct driver ledriver = { 78 "le", leprobe, 0, 0, leintr, 79 }; 80 81 int ledebug = 1; /* console error messages */ 82 83 /* 84 * Ethernet software status per interface. 85 * 86 * Each interface is referenced by a network interface structure, 87 * le_if, which the routing code uses to locate the interface. 88 * This structure contains the output queue for the interface, its address, ... 89 */ 90 struct le_softc { 91 struct arpcom sc_ac; /* common Ethernet structures */ 92 #define sc_if sc_ac.ac_if /* network-visible interface */ 93 #define sc_addr sc_ac.ac_enaddr /* hardware Ethernet address */ 94 volatile struct lereg1 *sc_r1; /* LANCE registers */ 95 volatile void *sc_r2; /* dual-port RAM */ 96 int sc_ler2pad; /* Do ring descriptors require short pads? */ 97 void (*sc_copytobuf)(); /* Copy to buffer */ 98 void (*sc_copyfrombuf)(); /* Copy from buffer */ 99 void (*sc_zerobuf)(); /* and Zero bytes in buffer */ 100 int sc_rmd; /* predicted next rmd to process */ 101 int sc_tmd; /* last tmd processed */ 102 int sc_tmdnext; /* next tmd to transmit with */ 103 /* stats */ 104 int sc_runt; 105 int sc_merr; 106 int sc_babl; 107 int sc_cerr; 108 int sc_miss; 109 int sc_rown; 110 int sc_xint; 111 int sc_uflo; 112 int sc_rxlen; 113 int sc_rxoff; 114 int sc_txoff; 115 int sc_busy; 116 short sc_iflags; 117 } le_softc[NLE]; 118 119 /* access LANCE registers */ 120 static void lewritereg(); 121 #define LERDWR(cntl, src, dst) { (dst) = (src); DELAY(10); } 122 #define LEWREG(src, dst) lewritereg(&(dst), (src)) 123 124 #define CPU_TO_CHIP_ADDR(cpu) \ 125 ((unsigned)(&(((struct lereg2 *)0)->cpu))) 126 127 #define LE_OFFSET_RAM 0x0 128 #define LE_OFFSET_LANCE 0x100000 129 #define LE_OFFSET_ROM 0x1c0000 130 131 void copytobuf_contig(), copyfrombuf_contig(), bzerobuf_contig(); 132 void copytobuf_gap2(), copyfrombuf_gap2(), bzerobuf_gap2(); 133 void copytobuf_gap16(), copyfrombuf_gap16(), bzerobuf_gap16(); 134 135 extern int pmax_boardtype; 136 extern u_long le_iomem; 137 extern u_long asic_base; 138 139 /* 140 * Test to see if device is present. 141 * Return true if found and initialized ok. 142 * If interface exists, make available by filling in network interface 143 * record. System will initialize the interface when it is ready 144 * to accept packets. 145 */ 146 leprobe(dp) 147 struct pmax_ctlr *dp; 148 { 149 volatile struct lereg1 *ler1; 150 struct le_softc *le = &le_softc[dp->pmax_unit]; 151 struct ifnet *ifp = &le->sc_if; 152 u_char *cp; 153 int i; 154 extern int leinit(), lereset(), leioctl(), lestart(), ether_output(); 155 156 switch (pmax_boardtype) { 157 case DS_PMAX: 158 le->sc_r1 = ler1 = (volatile struct lereg1 *)dp->pmax_addr; 159 le->sc_r2 = (volatile void *)MACH_PHYS_TO_UNCACHED(0x19000000); 160 cp = (u_char *)(MACH_PHYS_TO_UNCACHED(KN01_SYS_CLOCK) + 1); 161 le->sc_ler2pad = 1; 162 le->sc_copytobuf = copytobuf_gap2; 163 le->sc_copyfrombuf = copyfrombuf_gap2; 164 le->sc_zerobuf = bzerobuf_gap2; 165 break; 166 case DS_3MIN: 167 case DS_MAXINE: 168 case DS_3MAXPLUS: 169 if (dp->pmax_unit == 0) { 170 volatile u_int *ssr, *ldp; 171 172 le->sc_r1 = ler1 = (volatile struct lereg1 *) 173 ASIC_SYS_LANCE(asic_base); 174 cp = (u_char *)ASIC_SYS_ETHER_ADDRESS(asic_base); 175 le->sc_r2 = (volatile void *) 176 MACH_PHYS_TO_UNCACHED(le_iomem); 177 le->sc_ler2pad = 1; 178 le->sc_copytobuf = copytobuf_gap16; 179 le->sc_copyfrombuf = copyfrombuf_gap16; 180 le->sc_zerobuf = bzerobuf_gap16; 181 182 /* 183 * And enable Lance dma through the asic. 184 */ 185 ssr = (volatile u_int *)ASIC_REG_CSR(asic_base); 186 ldp = (volatile u_int *) 187 ASIC_REG_LANCE_DMAPTR(asic_base); 188 *ldp = (le_iomem << 3); /* phys addr << 3 */ 189 *ssr |= ASIC_CSR_DMAEN_LANCE; 190 break; 191 } 192 /* 193 * Units other than 0 are turbochannel option boards and fall 194 * through to DS_3MAX. 195 */ 196 case DS_3MAX: 197 le->sc_r1 = ler1 = (volatile struct lereg1 *) 198 (dp->pmax_addr + LE_OFFSET_LANCE); 199 le->sc_r2 = (volatile void *)(dp->pmax_addr + LE_OFFSET_RAM); 200 cp = (u_char *)(dp->pmax_addr + LE_OFFSET_ROM + 2); 201 le->sc_ler2pad = 0; 202 le->sc_copytobuf = copytobuf_contig; 203 le->sc_copyfrombuf = copyfrombuf_contig; 204 le->sc_zerobuf = bzerobuf_contig; 205 break; 206 default: 207 printf("Unknown CPU board type %d\n", pmax_boardtype); 208 return (0); 209 }; 210 211 /* 212 * Get the ethernet address out of rom 213 */ 214 for (i = 0; i < sizeof(le->sc_addr); i++) { 215 le->sc_addr[i] = *cp; 216 cp += 4; 217 } 218 219 /* make sure the chip is stopped */ 220 LEWREG(LE_CSR0, ler1->ler1_rap); 221 LEWREG(LE_STOP, ler1->ler1_rdp); 222 223 ifp->if_unit = dp->pmax_unit; 224 ifp->if_name = "le"; 225 ifp->if_mtu = ETHERMTU; 226 ifp->if_init = leinit; 227 ifp->if_reset = lereset; 228 ifp->if_ioctl = leioctl; 229 ifp->if_output = ether_output; 230 ifp->if_start = lestart; 231 #ifdef MULTICAST 232 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 233 #else 234 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX; 235 #endif 236 #if NBPFILTER > 0 237 bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header)); 238 #endif 239 if_attach(ifp); 240 241 printf("le%d at nexus0 csr 0x%x priority %d ethernet address %s\n", 242 dp->pmax_unit, dp->pmax_addr, dp->pmax_pri, 243 ether_sprintf(le->sc_addr)); 244 return (1); 245 } 246 247 #ifdef MULTICAST 248 /* 249 * Setup the logical address filter 250 */ 251 void 252 lesetladrf(sc) 253 register struct le_softc *sc; 254 { 255 register volatile struct lereg2 *ler2 = sc->sc_r2; 256 register struct ifnet *ifp = &sc->sc_if; 257 register struct ether_multi *enm; 258 register u_char *cp; 259 register u_long crc; 260 register u_long c; 261 register int i, len; 262 struct ether_multistep step; 263 264 /* 265 * Set up multicast address filter by passing all multicast 266 * addresses through a crc generator, and then using the high 267 * order 6 bits as a index into the 64 bit logical address 268 * filter. The high order two bits select the word, while the 269 * rest of the bits select the bit within the word. 270 */ 271 272 ler2->ler2_ladrf[0] = 0; 273 ler2->ler2_ladrf[1] = 0; 274 ifp->if_flags &= ~IFF_ALLMULTI; 275 ETHER_FIRST_MULTI(step, &sc->sc_ac, enm); 276 while (enm != NULL) { 277 if (bcmp((caddr_t)&enm->enm_addrlo, 278 (caddr_t)&enm->enm_addrhi, sizeof(enm->enm_addrlo)) == 0) { 279 /* 280 * We must listen to a range of multicast 281 * addresses. For now, just accept all 282 * multicasts, rather than trying to set only 283 * those filter bits needed to match the range. 284 * (At this time, the only use of address 285 * ranges is for IP multicast routing, for 286 * which the range is big enough to require all 287 * bits set.) 288 */ 289 LER2_ladrf0(ler2, 0xff); 290 LER2_ladrf1(ler2, 0xff); 291 LER2_ladrf2(ler2, 0xff); 292 LER2_ladrf3(ler2, 0xff); 293 ifp->if_flags |= IFF_ALLMULTI; 294 return; 295 } 296 297 cp = (unsigned char *)&enm->enm_addrlo; 298 c = *cp; 299 crc = 0xffffffff; 300 len = 6; 301 while (len-- > 0) { 302 c = *cp; 303 for (i = 0; i < 8; i++) { 304 if ((c & 0x01) ^ (crc & 0x01)) { 305 crc >>= 1; 306 crc = crc ^ 0xedb88320; 307 } 308 else 309 crc >>= 1; 310 c >>= 1; 311 } 312 cp++; 313 } 314 /* Just want the 6 most significant bits. */ 315 crc = crc >> 26; 316 317 /* Turn on the corresponding bit in the filter. */ 318 ler2->ler2_ladrf[crc >> 5] |= 1 << (crc & 0x1f); 319 320 ETHER_NEXT_MULTI(step, enm); 321 } 322 } 323 #endif 324 325 ledrinit(le) 326 struct le_softc *le; 327 { 328 register volatile void *rp; 329 register int i; 330 331 for (i = 0; i < LERBUF; i++) { 332 rp = LER2_RMDADDR(le->sc_r2, i); 333 LER2_rmd0(rp, CPU_TO_CHIP_ADDR(ler2_rbuf[i][0])); 334 LER2_rmd1(rp, LE_OWN); 335 LER2_rmd2(rp, -LEMTU); 336 LER2_rmd3(rp, 0); 337 } 338 for (i = 0; i < LETBUF; i++) { 339 rp = LER2_TMDADDR(le->sc_r2, i); 340 LER2_tmd0(rp, CPU_TO_CHIP_ADDR(ler2_tbuf[i][0])); 341 LER2_tmd1(rp, 0); 342 LER2_tmd2(rp, 0); 343 LER2_tmd3(rp, 0); 344 } 345 } 346 347 lereset(unit) 348 register int unit; 349 { 350 register struct le_softc *le = &le_softc[unit]; 351 register volatile struct lereg1 *ler1 = le->sc_r1; 352 register volatile void *ler2 = le->sc_r2; 353 register int timo = 100000; 354 register int stat; 355 356 #ifdef lint 357 stat = unit; 358 #endif 359 LEWREG(LE_CSR0, ler1->ler1_rap); 360 LEWREG(LE_STOP, ler1->ler1_rdp); 361 362 /* 363 * Setup for transmit/receive 364 */ 365 #if NBPFILTER > 0 366 if (le->sc_if.if_flags & IFF_PROMISC) 367 /* set the promiscuous bit */ 368 LER2_mode(ler2, LE_MODE | 0x8000); 369 else 370 #endif 371 LER2_mode(ler2, LE_MODE); 372 LER2_padr0(ler2, (le->sc_addr[1] << 8) | le->sc_addr[0]); 373 LER2_padr1(ler2, (le->sc_addr[3] << 8) | le->sc_addr[2]); 374 LER2_padr2(ler2, (le->sc_addr[5] << 8) | le->sc_addr[4]); 375 /* Setup the logical address filter */ 376 #ifdef MULTICAST 377 lesetladrf(le); 378 #else 379 LER2_ladrf0(ler2, 0); 380 LER2_ladrf1(ler2, 0); 381 LER2_ladrf2(ler2, 0); 382 LER2_ladrf3(ler2, 0); 383 #endif 384 LER2_rlen(ler2, LE_RLEN); 385 LER2_rdra(ler2, CPU_TO_CHIP_ADDR(ler2_rmd[0])); 386 LER2_tlen(ler2, LE_TLEN); 387 LER2_tdra(ler2, CPU_TO_CHIP_ADDR(ler2_tmd[0])); 388 ledrinit(le); 389 le->sc_rmd = 0; 390 le->sc_tmd = LETBUF - 1; 391 le->sc_tmdnext = 0; 392 393 LEWREG(LE_CSR1, ler1->ler1_rap); 394 LEWREG(CPU_TO_CHIP_ADDR(ler2_mode), ler1->ler1_rdp); 395 LEWREG(LE_CSR2, ler1->ler1_rap); 396 LEWREG(0, ler1->ler1_rdp); 397 LEWREG(LE_CSR3, ler1->ler1_rap); 398 LEWREG(0, ler1->ler1_rdp); 399 LEWREG(LE_CSR0, ler1->ler1_rap); 400 LERDWR(ler0, LE_INIT, ler1->ler1_rdp); 401 do { 402 if (--timo == 0) { 403 printf("le%d: init timeout, stat = 0x%x\n", 404 unit, stat); 405 break; 406 } 407 stat = ler1->ler1_rdp; 408 } while ((stat & LE_IDON) == 0); 409 LERDWR(ler0, LE_IDON, ler1->ler1_rdp); 410 LERDWR(ler0, LE_STRT | LE_INEA, ler1->ler1_rdp); 411 le->sc_if.if_flags &= ~IFF_OACTIVE; 412 } 413 414 /* 415 * Initialization of interface 416 */ 417 leinit(unit) 418 int unit; 419 { 420 register struct ifnet *ifp = &le_softc[unit].sc_if; 421 register struct ifaddr *ifa; 422 int s; 423 424 /* not yet, if address still unknown */ 425 for (ifa = ifp->if_addrlist;; ifa = ifa->ifa_next) 426 if (ifa == 0) 427 return; 428 else if (ifa->ifa_addr && ifa->ifa_addr->sa_family != AF_LINK) 429 break; 430 if ((ifp->if_flags & IFF_RUNNING) == 0) { 431 s = splnet(); 432 ifp->if_flags |= IFF_RUNNING; 433 lereset(unit); 434 (void) lestart(ifp); 435 splx(s); 436 } 437 } 438 439 #define LENEXTTMP \ 440 if (++bix == LETBUF) \ 441 bix = 0; \ 442 tmd = LER2_TMDADDR(le->sc_r2, bix) 443 444 /* 445 * Start output on interface. Get another datagram to send 446 * off of the interface queue, and copy it to the interface 447 * before starting the output. 448 */ 449 lestart(ifp) 450 struct ifnet *ifp; 451 { 452 register struct le_softc *le = &le_softc[ifp->if_unit]; 453 register int bix = le->sc_tmdnext; 454 register volatile void *tmd = LER2_TMDADDR(le->sc_r2, bix); 455 register struct mbuf *m; 456 int len = 0; 457 458 if ((le->sc_if.if_flags & IFF_RUNNING) == 0) 459 return (0); 460 while (bix != le->sc_tmd) { 461 if (LER2V_tmd1(tmd) & LE_OWN) 462 panic("lestart"); 463 IF_DEQUEUE(&le->sc_if.if_snd, m); 464 if (m == 0) 465 break; 466 len = leput(le, LER2_TBUFADDR(le->sc_r2, bix), m); 467 #if NBPFILTER > 0 468 /* 469 * If bpf is listening on this interface, let it 470 * see the packet before we commit it to the wire. 471 */ 472 if (ifp->if_bpf) 473 bpf_tap(ifp->if_bpf, 474 LER2_TBUFADDR(le->sc_r2, le->sc_tmd), len); 475 #endif 476 LER2_tmd3(tmd, 0); 477 LER2_tmd2(tmd, -len); 478 LER2_tmd1(tmd, LE_OWN | LE_STP | LE_ENP); 479 LENEXTTMP; 480 } 481 if (len != 0) { 482 le->sc_if.if_flags |= IFF_OACTIVE; 483 LERDWR(ler0, LE_TDMD | LE_INEA, le->sc_r1->ler1_rdp); 484 } 485 le->sc_tmdnext = bix; 486 return (0); 487 } 488 489 /* 490 * Process interrupts from the 7990 chip. 491 */ 492 void 493 leintr(unit) 494 int unit; 495 { 496 register struct le_softc *le; 497 register volatile struct lereg1 *ler1; 498 register int stat; 499 500 le = &le_softc[unit]; 501 ler1 = le->sc_r1; 502 stat = ler1->ler1_rdp; 503 if (!(stat & LE_INTR)) { 504 printf("le%d: spurrious interrupt\n", unit); 505 return; 506 } 507 if (stat & LE_SERR) { 508 leerror(unit, stat); 509 if (stat & LE_MERR) { 510 le->sc_merr++; 511 lereset(unit); 512 return; 513 } 514 if (stat & LE_BABL) 515 le->sc_babl++; 516 if (stat & LE_CERR) 517 le->sc_cerr++; 518 if (stat & LE_MISS) 519 le->sc_miss++; 520 LERDWR(ler0, LE_BABL|LE_CERR|LE_MISS|LE_INEA, ler1->ler1_rdp); 521 } 522 if ((stat & LE_RXON) == 0) { 523 le->sc_rxoff++; 524 lereset(unit); 525 return; 526 } 527 if ((stat & LE_TXON) == 0) { 528 le->sc_txoff++; 529 lereset(unit); 530 return; 531 } 532 if (stat & LE_RINT) { 533 /* interrupt is cleared in lerint */ 534 lerint(unit); 535 } 536 if (stat & LE_TINT) { 537 LERDWR(ler0, LE_TINT|LE_INEA, ler1->ler1_rdp); 538 lexint(unit); 539 } 540 } 541 542 /* 543 * Ethernet interface transmitter interrupt. 544 * Start another output if more data to send. 545 */ 546 lexint(unit) 547 register int unit; 548 { 549 register struct le_softc *le = &le_softc[unit]; 550 register int bix = le->sc_tmd; 551 register volatile void *tmd; 552 553 if ((le->sc_if.if_flags & IFF_OACTIVE) == 0) { 554 le->sc_xint++; 555 return; 556 } 557 LENEXTTMP; 558 while (bix != le->sc_tmdnext && (LER2V_tmd1(tmd) & LE_OWN) == 0) { 559 le->sc_tmd = bix; 560 if ((LER2V_tmd1(tmd) & LE_ERR) || (LER2V_tmd3(tmd) & LE_TBUFF)) { 561 lexerror(unit); 562 le->sc_if.if_oerrors++; 563 if (LER2V_tmd3(tmd) & (LE_TBUFF|LE_UFLO)) { 564 le->sc_uflo++; 565 lereset(unit); 566 break; 567 } 568 else if (LER2V_tmd3(tmd) & LE_LCOL) 569 le->sc_if.if_collisions++; 570 else if (LER2V_tmd3(tmd) & LE_RTRY) 571 le->sc_if.if_collisions += 16; 572 } 573 else if (LER2V_tmd1(tmd) & LE_ONE) 574 le->sc_if.if_collisions++; 575 else if (LER2V_tmd1(tmd) & LE_MORE) 576 /* what is the real number? */ 577 le->sc_if.if_collisions += 2; 578 else 579 le->sc_if.if_opackets++; 580 LENEXTTMP; 581 } 582 if (bix == le->sc_tmdnext) 583 le->sc_if.if_flags &= ~IFF_OACTIVE; 584 (void) lestart(&le->sc_if); 585 } 586 587 #define LENEXTRMP \ 588 if (++bix == LERBUF) \ 589 bix = 0; \ 590 rmd = LER2_RMDADDR(le->sc_r2, bix) 591 592 /* 593 * Ethernet interface receiver interrupt. 594 * If input error just drop packet. 595 * Decapsulate packet based on type and pass to type specific 596 * higher-level input routine. 597 */ 598 lerint(unit) 599 int unit; 600 { 601 register struct le_softc *le = &le_softc[unit]; 602 register int bix = le->sc_rmd; 603 register volatile void *rmd = LER2_RMDADDR(le->sc_r2, bix); 604 605 /* 606 * Out of sync with hardware, should never happen? 607 */ 608 if (LER2V_rmd1(rmd) & LE_OWN) { 609 le->sc_rown++; 610 LERDWR(le->sc_r0, LE_RINT|LE_INEA, le->sc_r1->ler1_rdp); 611 return; 612 } 613 614 /* 615 * Process all buffers with valid data 616 */ 617 while ((LER2V_rmd1(rmd) & LE_OWN) == 0) { 618 int len = LER2V_rmd3(rmd); 619 620 /* Clear interrupt to avoid race condition */ 621 LERDWR(le->sc_r0, LE_RINT|LE_INEA, le->sc_r1->ler1_rdp); 622 623 if (LER2V_rmd1(rmd) & LE_ERR) { 624 le->sc_rmd = bix; 625 lererror(unit, "bad packet"); 626 le->sc_if.if_ierrors++; 627 } else if ((LER2V_rmd1(rmd) & (LE_STP|LE_ENP)) != (LE_STP|LE_ENP)) { 628 /* 629 * Find the end of the packet so we can see how long 630 * it was. We still throw it away. 631 */ 632 do { 633 LERDWR(le->sc_r0, LE_RINT|LE_INEA, 634 le->sc_r1->ler1_rdp); 635 LER2_rmd3(rmd, 0); 636 LER2_rmd1(rmd, LE_OWN); 637 LENEXTRMP; 638 } while (!(LER2V_rmd1(rmd) & (LE_OWN|LE_ERR|LE_STP|LE_ENP))); 639 le->sc_rmd = bix; 640 lererror(unit, "chained buffer"); 641 le->sc_rxlen++; 642 /* 643 * If search terminated without successful completion 644 * we reset the hardware (conservative). 645 */ 646 if ((LER2V_rmd1(rmd) & (LE_OWN|LE_ERR|LE_STP|LE_ENP)) != 647 LE_ENP) { 648 lereset(unit); 649 return; 650 } 651 } else 652 leread(unit, LER2_RBUFADDR(le->sc_r2, bix), len); 653 LER2_rmd3(rmd, 0); 654 LER2_rmd1(rmd, LE_OWN); 655 LENEXTRMP; 656 } 657 MachEmptyWriteBuffer(); /* Paranoia */ 658 le->sc_rmd = bix; 659 } 660 661 /* 662 * Look at the packet in network buffer memory so we can be smart about how 663 * we copy the data into mbufs. 664 * This needs work since we can't just read network buffer memory like 665 * regular memory. 666 */ 667 leread(unit, buf, len) 668 int unit; 669 volatile void *buf; 670 int len; 671 { 672 register struct le_softc *le = &le_softc[unit]; 673 struct ether_header et; 674 struct mbuf *m, **hdrmp, **tailmp; 675 int off, resid, flags; 676 u_short sbuf[2], eth_type; 677 extern struct mbuf *leget(); 678 679 le->sc_if.if_ipackets++; 680 (*le->sc_copyfrombuf)(buf, 0, (char *)&et, sizeof (et)); 681 eth_type = ntohs(et.ether_type); 682 /* adjust input length to account for header and CRC */ 683 len = len - sizeof(struct ether_header) - 4; 684 685 if (eth_type >= ETHERTYPE_TRAIL && 686 eth_type < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) { 687 off = (eth_type - ETHERTYPE_TRAIL) * 512; 688 if (off >= ETHERMTU) 689 return; /* sanity */ 690 (*le->sc_copyfrombuf)(buf, sizeof (et) + off, (char *)sbuf, 691 sizeof (sbuf)); 692 eth_type = ntohs(sbuf[0]); 693 resid = ntohs(sbuf[1]); 694 if (off + resid > len) 695 return; /* sanity */ 696 len = off + resid; 697 } else 698 off = 0; 699 700 if (len <= 0) { 701 if (ledebug) 702 log(LOG_WARNING, 703 "le%d: ierror(runt packet): from %s: len=%d\n", 704 unit, ether_sprintf(et.ether_shost), len); 705 le->sc_runt++; 706 le->sc_if.if_ierrors++; 707 return; 708 } 709 flags = 0; 710 if (bcmp((caddr_t)etherbroadcastaddr, 711 (caddr_t)et.ether_dhost, sizeof(etherbroadcastaddr)) == 0) 712 flags |= M_BCAST; 713 if (et.ether_dhost[0] & 1) 714 flags |= M_MCAST; 715 716 #if NBPFILTER > 0 717 /* 718 * Check if there's a bpf filter listening on this interface. 719 * If so, hand off the raw packet to enet. 720 */ 721 if (le->sc_if.if_bpf) { 722 bpf_tap(le->sc_if.if_bpf, buf, len + sizeof(struct ether_header)); 723 724 /* 725 * Keep the packet if it's a broadcast or has our 726 * physical ethernet address (or if we support 727 * multicast and it's one). 728 */ 729 if ( 730 #ifdef MULTICAST 731 (flags & (M_BCAST | M_MCAST)) == 0 && 732 #else 733 (flags & M_BCAST) == 0 && 734 #endif 735 bcmp(et.ether_dhost, le->sc_addr, 736 sizeof(et.ether_dhost)) != 0) 737 return; 738 } 739 #endif 740 741 /* 742 * Pull packet off interface. Off is nonzero if packet 743 * has trailing header; leget will then force this header 744 * information to be at the front, but we still have to drop 745 * the type and length which are at the front of any trailer data. 746 * The hdrmp and tailmp pointers are used by lebpf_tap() to 747 * temporarily reorder the mbuf list. See the comment at the beginning 748 * of lebpf_tap() for all the ugly details. 749 */ 750 m = leget(le, buf, len, off, &le->sc_if, &hdrmp, &tailmp); 751 if (m == 0) 752 return; 753 m->m_flags |= flags; 754 et.ether_type = eth_type; 755 ether_input(&le->sc_if, &et, m); 756 } 757 758 /* 759 * Routine to copy from mbuf chain to transmit buffer in 760 * network buffer memory. 761 */ 762 leput(le, lebuf, m) 763 struct le_softc *le; 764 register volatile void *lebuf; 765 register struct mbuf *m; 766 { 767 register struct mbuf *mp; 768 register int len, tlen = 0; 769 register int boff = 0; 770 771 for (mp = m; mp; mp = mp->m_next) { 772 len = mp->m_len; 773 if (len == 0) 774 continue; 775 (*le->sc_copytobuf)(mtod(mp, char *), lebuf, boff, len); 776 tlen += len; 777 boff += len; 778 } 779 m_freem(m); 780 if (tlen < LEMINSIZE) { 781 (*le->sc_zerobuf)(lebuf, boff, LEMINSIZE - tlen); 782 tlen = LEMINSIZE; 783 } 784 return(tlen); 785 } 786 787 /* 788 * Routine to copy from network buffer memory into mbufs. 789 */ 790 struct mbuf * 791 leget(le, lebuf, totlen, off, ifp, hdrmp, tailmp) 792 struct le_softc *le; 793 volatile void *lebuf; 794 int totlen, off; 795 struct ifnet *ifp; 796 struct mbuf ***hdrmp, ***tailmp; 797 { 798 register struct mbuf *m; 799 struct mbuf *top = 0, **mp = ⊤ 800 register int len, resid, boff; 801 802 /* NOTE: sizeof(struct ether_header) should be even */ 803 boff = sizeof(struct ether_header); 804 if (off) { 805 /* NOTE: off should be even */ 806 boff += off + 2 * sizeof(u_short); 807 totlen -= 2 * sizeof(u_short); 808 resid = totlen - off; 809 } else 810 resid = totlen; 811 812 MGETHDR(m, M_DONTWAIT, MT_DATA); 813 if (m == 0) 814 return (0); 815 m->m_pkthdr.rcvif = ifp; 816 m->m_pkthdr.len = totlen; 817 m->m_len = MHLEN; 818 819 while (totlen > 0) { 820 if (top) { 821 MGET(m, M_DONTWAIT, MT_DATA); 822 if (m == 0) { 823 m_freem(top); 824 return (0); 825 } 826 m->m_len = MLEN; 827 } 828 829 if (resid >= MINCLSIZE) 830 MCLGET(m, M_DONTWAIT); 831 if (m->m_flags & M_EXT) 832 m->m_len = min(resid, MCLBYTES); 833 else if (resid < m->m_len) { 834 /* 835 * Place initial small packet/header at end of mbuf. 836 */ 837 if (top == 0 && resid + max_linkhdr <= m->m_len) 838 m->m_data += max_linkhdr; 839 m->m_len = resid; 840 } 841 len = m->m_len; 842 (*le->sc_copyfrombuf)(lebuf, boff, mtod(m, char *), len); 843 boff += len; 844 *mp = m; 845 mp = &m->m_next; 846 totlen -= len; 847 resid -= len; 848 if (resid == 0) { 849 boff = sizeof (struct ether_header); 850 resid = totlen; 851 *hdrmp = mp; 852 } 853 } 854 *tailmp = mp; 855 return (top); 856 } 857 858 /* 859 * Process an ioctl request. 860 */ 861 leioctl(ifp, cmd, data) 862 register struct ifnet *ifp; 863 int cmd; 864 caddr_t data; 865 { 866 register struct ifaddr *ifa = (struct ifaddr *)data; 867 struct le_softc *le = &le_softc[ifp->if_unit]; 868 volatile struct lereg1 *ler1 = le->sc_r1; 869 int s, error = 0; 870 871 s = splnet(); 872 switch (cmd) { 873 874 case SIOCSIFADDR: 875 ifp->if_flags |= IFF_UP; 876 switch (ifa->ifa_addr->sa_family) { 877 #ifdef INET 878 case AF_INET: 879 leinit(ifp->if_unit); /* before arpwhohas */ 880 ((struct arpcom *)ifp)->ac_ipaddr = 881 IA_SIN(ifa)->sin_addr; 882 arpwhohas((struct arpcom *)ifp, &IA_SIN(ifa)->sin_addr); 883 break; 884 #endif 885 #ifdef NS 886 case AF_NS: 887 { 888 register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr); 889 890 if (ns_nullhost(*ina)) 891 ina->x_host = *(union ns_host *)(le->sc_addr); 892 else { 893 /* 894 * The manual says we can't change the address 895 * while the receiver is armed, 896 * so reset everything 897 */ 898 ifp->if_flags &= ~IFF_RUNNING; 899 LEWREG(LE_STOP, ler1->ler1_rdp); 900 bcopy((caddr_t)ina->x_host.c_host, 901 (caddr_t)le->sc_addr, sizeof(le->sc_addr)); 902 } 903 leinit(ifp->if_unit); /* does le_setaddr() */ 904 break; 905 } 906 #endif 907 default: 908 leinit(ifp->if_unit); 909 break; 910 } 911 break; 912 913 #if defined (CCITT) && defined (LLC) 914 case SIOCSIFCONF_X25: 915 ifp->if_flags |= IFF_UP; 916 ifa->ifa_rtrequest = cons_rtrequest; 917 error = x25_llcglue(PRC_IFUP, ifa->ifa_addr); 918 if (error == 0) 919 leinit(ifp->if_unit); 920 break; 921 #endif /* CCITT && LLC */ 922 923 case SIOCSIFFLAGS: 924 if ((ifp->if_flags & IFF_UP) == 0 && 925 ifp->if_flags & IFF_RUNNING) { 926 LEWREG(LE_STOP, ler1->ler1_rdp); 927 ifp->if_flags &= ~IFF_RUNNING; 928 } else if (ifp->if_flags & IFF_UP && 929 (ifp->if_flags & IFF_RUNNING) == 0) 930 leinit(ifp->if_unit); 931 /* 932 * If the state of the promiscuous bit changes, the interface 933 * must be reset to effect the change. 934 */ 935 if (((ifp->if_flags ^ le->sc_iflags) & IFF_PROMISC) && 936 (ifp->if_flags & IFF_RUNNING)) { 937 le->sc_iflags = ifp->if_flags; 938 lereset(ifp->if_unit); 939 lestart(ifp); 940 } 941 break; 942 943 #ifdef MULTICAST 944 case SIOCADDMULTI: 945 case SIOCDELMULTI: 946 /* Update our multicast list */ 947 error = (cmd == SIOCADDMULTI) ? 948 ether_addmulti((struct ifreq *)data, &le->sc_ac) : 949 ether_delmulti((struct ifreq *)data, &le->sc_ac); 950 951 if (error == ENETRESET) { 952 /* 953 * Multicast list has changed; set the hardware 954 * filter accordingly. 955 */ 956 lereset(ifp->if_unit); 957 error = 0; 958 } 959 break; 960 #endif 961 962 default: 963 error = EINVAL; 964 } 965 splx(s); 966 return (error); 967 } 968 969 leerror(unit, stat) 970 int unit; 971 int stat; 972 { 973 if (!ledebug) 974 return; 975 976 /* 977 * Not all transceivers implement heartbeat 978 * so we only log CERR once. 979 */ 980 if ((stat & LE_CERR) && le_softc[unit].sc_cerr) 981 return; 982 log(LOG_WARNING, 983 "le%d: error: stat=%b\n", unit, 984 stat, 985 "\20\20ERR\17BABL\16CERR\15MISS\14MERR\13RINT\12TINT\11IDON\10INTR\07INEA\06RXON\05TXON\04TDMD\03STOP\02STRT\01INIT"); 986 } 987 988 lererror(unit, msg) 989 int unit; 990 char *msg; 991 { 992 register struct le_softc *le = &le_softc[unit]; 993 register volatile void *rmd; 994 u_char eaddr[6]; 995 int len; 996 997 if (!ledebug) 998 return; 999 1000 rmd = LER2_RMDADDR(le->sc_r2, le->sc_rmd); 1001 len = LER2V_rmd3(rmd); 1002 if (len > 11) 1003 (*le->sc_copyfrombuf)(LER2_RBUFADDR(le->sc_r2, le->sc_rmd), 1004 6, eaddr, 6); 1005 log(LOG_WARNING, 1006 "le%d: ierror(%s): from %s: buf=%d, len=%d, rmd1=%b\n", 1007 unit, msg, 1008 len > 11 ? ether_sprintf(eaddr) : "unknown", 1009 le->sc_rmd, len, 1010 LER2V_rmd1(rmd), 1011 "\20\20OWN\17ERR\16FRAM\15OFLO\14CRC\13RBUF\12STP\11ENP"); 1012 } 1013 1014 lexerror(unit) 1015 int unit; 1016 { 1017 register struct le_softc *le = &le_softc[unit]; 1018 register volatile void *tmd; 1019 u_char eaddr[6]; 1020 int len; 1021 1022 if (!ledebug) 1023 return; 1024 1025 tmd = LER2_TMDADDR(le->sc_r2, 0); 1026 len = -LER2V_tmd2(tmd); 1027 if (len > 5) 1028 (*le->sc_copyfrombuf)(LER2_TBUFADDR(le->sc_r2, 0), 0, eaddr, 6); 1029 log(LOG_WARNING, 1030 "le%d: oerror: to %s: buf=%d, len=%d, tmd1=%b, tmd3=%b\n", 1031 unit, 1032 len > 5 ? ether_sprintf(eaddr) : "unknown", 1033 0, len, 1034 LER2V_tmd1(tmd), 1035 "\20\20OWN\17ERR\16RES\15MORE\14ONE\13DEF\12STP\11ENP", 1036 LER2V_tmd3(tmd), 1037 "\20\20BUFF\17UFLO\16RES\15LCOL\14LCAR\13RTRY"); 1038 } 1039 1040 /* 1041 * Write a lance register port, reading it back to ensure success. This seems 1042 * to be necessary during initialization, since the chip appears to be a bit 1043 * pokey sometimes. 1044 */ 1045 static void 1046 lewritereg(regptr, val) 1047 register volatile u_short *regptr; 1048 register u_short val; 1049 { 1050 register int i = 0; 1051 1052 while (*regptr != val) { 1053 *regptr = val; 1054 MachEmptyWriteBuffer(); 1055 if (++i > 10000) { 1056 printf("le: Reg did not settle (to x%x): x%x\n", 1057 val, *regptr); 1058 return; 1059 } 1060 DELAY(100); 1061 } 1062 } 1063 1064 /* 1065 * Routines for accessing the transmit and receive buffers. Unfortunately, 1066 * CPU addressing of these buffers is done in one of 3 ways: 1067 * - contiguous (for the 3max and turbochannel option card) 1068 * - gap2, which means shorts (2 bytes) interspersed with short (2 byte) 1069 * spaces (for the pmax) 1070 * - gap16, which means 16bytes interspersed with 16byte spaces 1071 * for buffers which must begin on a 32byte boundary (for 3min and maxine) 1072 * The buffer offset is the logical byte offset, assuming contiguous storage. 1073 */ 1074 void 1075 copytobuf_contig(from, lebuf, boff, len) 1076 char *from; 1077 volatile void *lebuf; 1078 int boff; 1079 int len; 1080 { 1081 1082 /* 1083 * Just call bcopy() to do the work. 1084 */ 1085 bcopy(from, ((char *)lebuf) + boff, len); 1086 } 1087 1088 void 1089 copyfrombuf_contig(lebuf, boff, to, len) 1090 volatile void *lebuf; 1091 int boff; 1092 char *to; 1093 int len; 1094 { 1095 1096 /* 1097 * Just call bcopy() to do the work. 1098 */ 1099 bcopy(((char *)lebuf) + boff, to, len); 1100 } 1101 1102 void 1103 bzerobuf_contig(lebuf, boff, len) 1104 volatile void *lebuf; 1105 int boff; 1106 int len; 1107 { 1108 1109 /* 1110 * Just let bzero() do the work 1111 */ 1112 bzero(((char *)lebuf) + boff, len); 1113 } 1114 1115 /* 1116 * For the pmax the buffer consists of shorts (2 bytes) interspersed with 1117 * short (2 byte) spaces and must be accessed with halfword load/stores. 1118 * (don't worry about doing an extra byte) 1119 */ 1120 void 1121 copytobuf_gap2(from, lebuf, boff, len) 1122 register char *from; 1123 volatile void *lebuf; 1124 int boff; 1125 register int len; 1126 { 1127 register volatile u_short *bptr; 1128 register int xfer; 1129 1130 if (boff & 0x1) { 1131 /* handle unaligned first byte */ 1132 bptr = ((volatile u_short *)lebuf) + (boff - 1); 1133 *bptr = (*from++ << 8) | (*bptr & 0xff); 1134 bptr += 2; 1135 len--; 1136 } else 1137 bptr = ((volatile u_short *)lebuf) + boff; 1138 if ((unsigned)from & 0x1) { 1139 while (len > 1) { 1140 *bptr = (from[1] << 8) | from[0]; 1141 bptr += 2; 1142 from += 2; 1143 len -= 2; 1144 } 1145 } else { 1146 /* optimize for aligned transfers */ 1147 xfer = (int)((unsigned)len & ~0x1); 1148 CopyToBuffer((u_short *)from, bptr, xfer); 1149 bptr += xfer; 1150 from += xfer; 1151 len -= xfer; 1152 } 1153 if (len == 1) 1154 *bptr = (u_short)*from; 1155 } 1156 1157 void 1158 copyfrombuf_gap2(lebuf, boff, to, len) 1159 volatile void *lebuf; 1160 int boff; 1161 register char *to; 1162 register int len; 1163 { 1164 register volatile u_short *bptr; 1165 register u_short tmp; 1166 register int xfer; 1167 1168 if (boff & 0x1) { 1169 /* handle unaligned first byte */ 1170 bptr = ((volatile u_short *)lebuf) + (boff - 1); 1171 *to++ = (*bptr >> 8) & 0xff; 1172 bptr += 2; 1173 len--; 1174 } else 1175 bptr = ((volatile u_short *)lebuf) + boff; 1176 if ((unsigned)to & 0x1) { 1177 while (len > 1) { 1178 tmp = *bptr; 1179 *to++ = tmp & 0xff; 1180 *to++ = (tmp >> 8) & 0xff; 1181 bptr += 2; 1182 len -= 2; 1183 } 1184 } else { 1185 /* optimize for aligned transfers */ 1186 xfer = (int)((unsigned)len & ~0x1); 1187 CopyFromBuffer(bptr, to, xfer); 1188 bptr += xfer; 1189 to += xfer; 1190 len -= xfer; 1191 } 1192 if (len == 1) 1193 *to = *bptr & 0xff; 1194 } 1195 1196 void 1197 bzerobuf_gap2(lebuf, boff, len) 1198 volatile void *lebuf; 1199 int boff; 1200 int len; 1201 { 1202 register volatile u_short *bptr; 1203 1204 if ((unsigned)boff & 0x1) { 1205 bptr = ((volatile u_short *)lebuf) + (boff - 1); 1206 *bptr &= 0xff; 1207 bptr += 2; 1208 len--; 1209 } else 1210 bptr = ((volatile u_short *)lebuf) + boff; 1211 while (len > 0) { 1212 *bptr = 0; 1213 bptr += 2; 1214 len -= 2; 1215 } 1216 } 1217 1218 /* 1219 * For the 3min and maxine, the buffers are in main memory filled in with 1220 * 16byte blocks interspersed with 16byte spaces. 1221 */ 1222 void 1223 copytobuf_gap16(from, lebuf, boff, len) 1224 register char *from; 1225 volatile void *lebuf; 1226 int boff; 1227 register int len; 1228 { 1229 register char *bptr; 1230 register int xfer; 1231 1232 bptr = ((char *)lebuf) + ((boff << 1) & ~0x1f); 1233 boff &= 0xf; 1234 xfer = min(len, 16 - boff); 1235 while (len > 0) { 1236 bcopy(from, ((char *)bptr) + boff, xfer); 1237 from += xfer; 1238 bptr += 32; 1239 boff = 0; 1240 len -= xfer; 1241 xfer = min(len, 16); 1242 } 1243 } 1244 1245 void 1246 copyfrombuf_gap16(lebuf, boff, to, len) 1247 volatile void *lebuf; 1248 int boff; 1249 register char *to; 1250 register int len; 1251 { 1252 register char *bptr; 1253 register int xfer; 1254 1255 bptr = ((char *)lebuf) + ((boff << 1) & ~0x1f); 1256 boff &= 0xf; 1257 xfer = min(len, 16 - boff); 1258 while (len > 0) { 1259 bcopy(((char *)bptr) + boff, to, xfer); 1260 to += xfer; 1261 bptr += 32; 1262 boff = 0; 1263 len -= xfer; 1264 xfer = min(len, 16); 1265 } 1266 } 1267 1268 void 1269 bzerobuf_gap16(lebuf, boff, len) 1270 volatile void *lebuf; 1271 int boff; 1272 register int len; 1273 { 1274 register char *bptr; 1275 register int xfer; 1276 1277 bptr = ((char *)lebuf) + ((boff << 1) & ~0x1f); 1278 boff &= 0xf; 1279 xfer = min(len, 16 - boff); 1280 while (len > 0) { 1281 bzero(((char *)bptr) + boff, xfer); 1282 bptr += 32; 1283 boff = 0; 1284 len -= xfer; 1285 xfer = min(len, 16); 1286 } 1287 } 1288 #endif /* NLE */ 1289