1 /*- 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. 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 8.3 (Berkeley) 07/03/94 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 = 0; /* 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(le) 253 register struct le_softc *le; 254 { 255 register volatile struct lereg2 *ler2 = le->sc_r2; 256 register struct ifnet *ifp = &le->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 an 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_ladrf0(ler2, 0); 273 LER2_ladrf1(ler2, 0); 274 ifp->if_flags &= ~IFF_ALLMULTI; 275 ETHER_FIRST_MULTI(step, &le->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 switch (crc >> 5) { 319 case 0: 320 LER2_ladrf0(ler2, 1 << (crc & 0x1f)); 321 break; 322 case 1: 323 LER2_ladrf1(ler2, 1 << (crc & 0x1f)); 324 break; 325 case 2: 326 LER2_ladrf2(ler2, 1 << (crc & 0x1f)); 327 break; 328 case 3: 329 LER2_ladrf3(ler2, 1 << (crc & 0x1f)); 330 } 331 332 ETHER_NEXT_MULTI(step, enm); 333 } 334 } 335 #endif 336 337 ledrinit(le) 338 struct le_softc *le; 339 { 340 register volatile void *rp; 341 register int i; 342 343 for (i = 0; i < LERBUF; i++) { 344 rp = LER2_RMDADDR(le->sc_r2, i); 345 LER2_rmd0(rp, CPU_TO_CHIP_ADDR(ler2_rbuf[i][0])); 346 LER2_rmd1(rp, LE_OWN); 347 LER2_rmd2(rp, -LEMTU); 348 LER2_rmd3(rp, 0); 349 } 350 for (i = 0; i < LETBUF; i++) { 351 rp = LER2_TMDADDR(le->sc_r2, i); 352 LER2_tmd0(rp, CPU_TO_CHIP_ADDR(ler2_tbuf[i][0])); 353 LER2_tmd1(rp, 0); 354 LER2_tmd2(rp, 0); 355 LER2_tmd3(rp, 0); 356 } 357 } 358 359 lereset(unit) 360 register int unit; 361 { 362 register struct le_softc *le = &le_softc[unit]; 363 register volatile struct lereg1 *ler1 = le->sc_r1; 364 register volatile void *ler2 = le->sc_r2; 365 register int timo = 100000; 366 register int stat; 367 368 #ifdef lint 369 stat = unit; 370 #endif 371 LEWREG(LE_CSR0, ler1->ler1_rap); 372 LEWREG(LE_STOP, ler1->ler1_rdp); 373 374 /* 375 * Setup for transmit/receive 376 */ 377 #if NBPFILTER > 0 378 if (le->sc_if.if_flags & IFF_PROMISC) 379 /* set the promiscuous bit */ 380 LER2_mode(ler2, LE_MODE | 0x8000); 381 else 382 #endif 383 LER2_mode(ler2, LE_MODE); 384 LER2_padr0(ler2, (le->sc_addr[1] << 8) | le->sc_addr[0]); 385 LER2_padr1(ler2, (le->sc_addr[3] << 8) | le->sc_addr[2]); 386 LER2_padr2(ler2, (le->sc_addr[5] << 8) | le->sc_addr[4]); 387 /* Setup the logical address filter */ 388 #ifdef MULTICAST 389 lesetladrf(le); 390 #else 391 LER2_ladrf0(ler2, 0); 392 LER2_ladrf1(ler2, 0); 393 LER2_ladrf2(ler2, 0); 394 LER2_ladrf3(ler2, 0); 395 #endif 396 LER2_rlen(ler2, LE_RLEN); 397 LER2_rdra(ler2, CPU_TO_CHIP_ADDR(ler2_rmd[0])); 398 LER2_tlen(ler2, LE_TLEN); 399 LER2_tdra(ler2, CPU_TO_CHIP_ADDR(ler2_tmd[0])); 400 ledrinit(le); 401 le->sc_rmd = 0; 402 le->sc_tmd = LETBUF - 1; 403 le->sc_tmdnext = 0; 404 405 LEWREG(LE_CSR1, ler1->ler1_rap); 406 LEWREG(CPU_TO_CHIP_ADDR(ler2_mode), ler1->ler1_rdp); 407 LEWREG(LE_CSR2, ler1->ler1_rap); 408 LEWREG(0, ler1->ler1_rdp); 409 LEWREG(LE_CSR3, ler1->ler1_rap); 410 LEWREG(0, ler1->ler1_rdp); 411 LEWREG(LE_CSR0, ler1->ler1_rap); 412 LERDWR(ler0, LE_INIT, ler1->ler1_rdp); 413 do { 414 if (--timo == 0) { 415 printf("le%d: init timeout, stat = 0x%x\n", 416 unit, stat); 417 break; 418 } 419 stat = ler1->ler1_rdp; 420 } while ((stat & LE_IDON) == 0); 421 LERDWR(ler0, LE_IDON, ler1->ler1_rdp); 422 LERDWR(ler0, LE_STRT | LE_INEA, ler1->ler1_rdp); 423 le->sc_if.if_flags &= ~IFF_OACTIVE; 424 } 425 426 /* 427 * Initialization of interface 428 */ 429 leinit(unit) 430 int unit; 431 { 432 register struct ifnet *ifp = &le_softc[unit].sc_if; 433 register struct ifaddr *ifa; 434 int s; 435 436 /* not yet, if address still unknown */ 437 for (ifa = ifp->if_addrlist;; ifa = ifa->ifa_next) 438 if (ifa == 0) 439 return; 440 else if (ifa->ifa_addr && ifa->ifa_addr->sa_family != AF_LINK) 441 break; 442 if ((ifp->if_flags & IFF_RUNNING) == 0) { 443 s = splnet(); 444 ifp->if_flags |= IFF_RUNNING; 445 lereset(unit); 446 (void) lestart(ifp); 447 splx(s); 448 } 449 } 450 451 #define LENEXTTMP \ 452 if (++bix == LETBUF) \ 453 bix = 0; \ 454 tmd = LER2_TMDADDR(le->sc_r2, bix) 455 456 /* 457 * Start output on interface. Get another datagram to send 458 * off of the interface queue, and copy it to the interface 459 * before starting the output. 460 */ 461 lestart(ifp) 462 struct ifnet *ifp; 463 { 464 register struct le_softc *le = &le_softc[ifp->if_unit]; 465 register int bix = le->sc_tmdnext; 466 register volatile void *tmd = LER2_TMDADDR(le->sc_r2, bix); 467 register struct mbuf *m; 468 int len = 0; 469 470 if ((le->sc_if.if_flags & IFF_RUNNING) == 0) 471 return (0); 472 while (bix != le->sc_tmd) { 473 if (LER2V_tmd1(tmd) & LE_OWN) 474 panic("lestart"); 475 IF_DEQUEUE(&le->sc_if.if_snd, m); 476 if (m == 0) 477 break; 478 #if NBPFILTER > 0 479 /* 480 * If bpf is listening on this interface, let it 481 * see the packet before we commit it to the wire. 482 */ 483 if (ifp->if_bpf) 484 bpf_mtap(ifp->if_bpf, m); 485 #endif 486 len = leput(le, LER2_TBUFADDR(le->sc_r2, bix), m); 487 LER2_tmd3(tmd, 0); 488 LER2_tmd2(tmd, -len); 489 LER2_tmd1(tmd, LE_OWN | LE_STP | LE_ENP); 490 LENEXTTMP; 491 } 492 if (len != 0) { 493 le->sc_if.if_flags |= IFF_OACTIVE; 494 LERDWR(ler0, LE_TDMD | LE_INEA, le->sc_r1->ler1_rdp); 495 } 496 le->sc_tmdnext = bix; 497 return (0); 498 } 499 500 /* 501 * Process interrupts from the 7990 chip. 502 */ 503 void 504 leintr(unit) 505 int unit; 506 { 507 register struct le_softc *le; 508 register volatile struct lereg1 *ler1; 509 register int stat; 510 511 le = &le_softc[unit]; 512 ler1 = le->sc_r1; 513 stat = ler1->ler1_rdp; 514 if (!(stat & LE_INTR)) { 515 printf("le%d: spurrious interrupt\n", unit); 516 return; 517 } 518 if (stat & LE_SERR) { 519 leerror(unit, stat); 520 if (stat & LE_MERR) { 521 le->sc_merr++; 522 lereset(unit); 523 return; 524 } 525 if (stat & LE_BABL) 526 le->sc_babl++; 527 if (stat & LE_CERR) 528 le->sc_cerr++; 529 if (stat & LE_MISS) 530 le->sc_miss++; 531 LERDWR(ler0, LE_BABL|LE_CERR|LE_MISS|LE_INEA, ler1->ler1_rdp); 532 } 533 if ((stat & LE_RXON) == 0) { 534 le->sc_rxoff++; 535 lereset(unit); 536 return; 537 } 538 if ((stat & LE_TXON) == 0) { 539 le->sc_txoff++; 540 lereset(unit); 541 return; 542 } 543 if (stat & LE_RINT) { 544 /* interrupt is cleared in lerint */ 545 lerint(unit); 546 } 547 if (stat & LE_TINT) { 548 LERDWR(ler0, LE_TINT|LE_INEA, ler1->ler1_rdp); 549 lexint(unit); 550 } 551 } 552 553 /* 554 * Ethernet interface transmitter interrupt. 555 * Start another output if more data to send. 556 */ 557 lexint(unit) 558 register int unit; 559 { 560 register struct le_softc *le = &le_softc[unit]; 561 register int bix = le->sc_tmd; 562 register volatile void *tmd; 563 564 if ((le->sc_if.if_flags & IFF_OACTIVE) == 0) { 565 le->sc_xint++; 566 return; 567 } 568 LENEXTTMP; 569 while (bix != le->sc_tmdnext && (LER2V_tmd1(tmd) & LE_OWN) == 0) { 570 le->sc_tmd = bix; 571 if ((LER2V_tmd1(tmd) & LE_ERR) || (LER2V_tmd3(tmd) & LE_TBUFF)) { 572 lexerror(unit); 573 le->sc_if.if_oerrors++; 574 if (LER2V_tmd3(tmd) & (LE_TBUFF|LE_UFLO)) { 575 le->sc_uflo++; 576 lereset(unit); 577 break; 578 } 579 else if (LER2V_tmd3(tmd) & LE_LCOL) 580 le->sc_if.if_collisions++; 581 else if (LER2V_tmd3(tmd) & LE_RTRY) 582 le->sc_if.if_collisions += 16; 583 } 584 else if (LER2V_tmd1(tmd) & LE_ONE) 585 le->sc_if.if_collisions++; 586 else if (LER2V_tmd1(tmd) & LE_MORE) 587 /* what is the real number? */ 588 le->sc_if.if_collisions += 2; 589 else 590 le->sc_if.if_opackets++; 591 LENEXTTMP; 592 } 593 if (bix == le->sc_tmdnext) 594 le->sc_if.if_flags &= ~IFF_OACTIVE; 595 (void) lestart(&le->sc_if); 596 } 597 598 #define LENEXTRMP \ 599 if (++bix == LERBUF) \ 600 bix = 0; \ 601 rmd = LER2_RMDADDR(le->sc_r2, bix) 602 603 /* 604 * Ethernet interface receiver interrupt. 605 * If input error just drop packet. 606 * Decapsulate packet based on type and pass to type specific 607 * higher-level input routine. 608 */ 609 lerint(unit) 610 int unit; 611 { 612 register struct le_softc *le = &le_softc[unit]; 613 register int bix = le->sc_rmd; 614 register volatile void *rmd = LER2_RMDADDR(le->sc_r2, bix); 615 616 /* 617 * Out of sync with hardware, should never happen? 618 */ 619 if (LER2V_rmd1(rmd) & LE_OWN) { 620 le->sc_rown++; 621 LERDWR(le->sc_r0, LE_RINT|LE_INEA, le->sc_r1->ler1_rdp); 622 return; 623 } 624 625 /* 626 * Process all buffers with valid data 627 */ 628 while ((LER2V_rmd1(rmd) & LE_OWN) == 0) { 629 int len = LER2V_rmd3(rmd); 630 631 /* Clear interrupt to avoid race condition */ 632 LERDWR(le->sc_r0, LE_RINT|LE_INEA, le->sc_r1->ler1_rdp); 633 634 if (LER2V_rmd1(rmd) & LE_ERR) { 635 le->sc_rmd = bix; 636 lererror(unit, "bad packet"); 637 le->sc_if.if_ierrors++; 638 } else if ((LER2V_rmd1(rmd) & (LE_STP|LE_ENP)) != (LE_STP|LE_ENP)) { 639 /* 640 * Find the end of the packet so we can see how long 641 * it was. We still throw it away. 642 */ 643 do { 644 LERDWR(le->sc_r0, LE_RINT|LE_INEA, 645 le->sc_r1->ler1_rdp); 646 LER2_rmd3(rmd, 0); 647 LER2_rmd1(rmd, LE_OWN); 648 LENEXTRMP; 649 } while (!(LER2V_rmd1(rmd) & (LE_OWN|LE_ERR|LE_STP|LE_ENP))); 650 le->sc_rmd = bix; 651 lererror(unit, "chained buffer"); 652 le->sc_rxlen++; 653 /* 654 * If search terminated without successful completion 655 * we reset the hardware (conservative). 656 */ 657 if ((LER2V_rmd1(rmd) & (LE_OWN|LE_ERR|LE_STP|LE_ENP)) != 658 LE_ENP) { 659 lereset(unit); 660 return; 661 } 662 } else 663 leread(unit, LER2_RBUFADDR(le->sc_r2, bix), len); 664 LER2_rmd3(rmd, 0); 665 LER2_rmd1(rmd, LE_OWN); 666 LENEXTRMP; 667 } 668 MachEmptyWriteBuffer(); /* Paranoia */ 669 le->sc_rmd = bix; 670 } 671 672 /* 673 * Look at the packet in network buffer memory so we can be smart about how 674 * we copy the data into mbufs. 675 * This needs work since we can't just read network buffer memory like 676 * regular memory. 677 */ 678 leread(unit, buf, len) 679 int unit; 680 volatile void *buf; 681 int len; 682 { 683 register struct le_softc *le = &le_softc[unit]; 684 struct ether_header et; 685 struct mbuf *m; 686 int off, resid, flags; 687 u_short sbuf[2], eth_type; 688 extern struct mbuf *leget(); 689 690 le->sc_if.if_ipackets++; 691 (*le->sc_copyfrombuf)(buf, 0, (char *)&et, sizeof (et)); 692 eth_type = ntohs(et.ether_type); 693 /* adjust input length to account for header and CRC */ 694 len = len - sizeof(struct ether_header) - 4; 695 696 if (eth_type >= ETHERTYPE_TRAIL && 697 eth_type < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) { 698 off = (eth_type - ETHERTYPE_TRAIL) * 512; 699 if (off >= ETHERMTU) 700 return; /* sanity */ 701 (*le->sc_copyfrombuf)(buf, sizeof (et) + off, (char *)sbuf, 702 sizeof (sbuf)); 703 eth_type = ntohs(sbuf[0]); 704 resid = ntohs(sbuf[1]); 705 if (off + resid > len) 706 return; /* sanity */ 707 len = off + resid; 708 } else 709 off = 0; 710 711 if (len <= 0) { 712 if (ledebug) 713 log(LOG_WARNING, 714 "le%d: ierror(runt packet): from %s: len=%d\n", 715 unit, ether_sprintf(et.ether_shost), len); 716 le->sc_runt++; 717 le->sc_if.if_ierrors++; 718 return; 719 } 720 flags = 0; 721 if (bcmp((caddr_t)etherbroadcastaddr, 722 (caddr_t)et.ether_dhost, sizeof(etherbroadcastaddr)) == 0) 723 flags |= M_BCAST; 724 if (et.ether_dhost[0] & 1) 725 flags |= M_MCAST; 726 727 /* 728 * Pull packet off interface. Off is nonzero if packet 729 * has trailing header; leget will then force this header 730 * information to be at the front, but we still have to drop 731 * the type and length which are at the front of any trailer data. 732 */ 733 m = leget(le, buf, len, off, &le->sc_if); 734 if (m == 0) 735 return; 736 #if NBPFILTER > 0 737 /* 738 * Check if there's a bpf filter listening on this interface. 739 * If so, hand off the raw packet to enet. 740 */ 741 if (le->sc_if.if_bpf) { 742 bpf_mtap(le->sc_if.if_bpf, m); 743 744 /* 745 * Keep the packet if it's a broadcast or has our 746 * physical ethernet address (or if we support 747 * multicast and it's one). 748 */ 749 if ( 750 #ifdef MULTICAST 751 (flags & (M_BCAST | M_MCAST)) == 0 && 752 #else 753 (flags & M_BCAST) == 0 && 754 #endif 755 bcmp(et.ether_dhost, le->sc_addr, 756 sizeof(et.ether_dhost)) != 0) { 757 m_freem(m); 758 return; 759 } 760 } 761 #endif 762 m->m_flags |= flags; 763 et.ether_type = eth_type; 764 ether_input(&le->sc_if, &et, m); 765 } 766 767 /* 768 * Routine to copy from mbuf chain to transmit buffer in 769 * network buffer memory. 770 */ 771 leput(le, lebuf, m) 772 struct le_softc *le; 773 register volatile void *lebuf; 774 register struct mbuf *m; 775 { 776 register struct mbuf *mp; 777 register int len, tlen = 0; 778 register int boff = 0; 779 780 for (mp = m; mp; mp = mp->m_next) { 781 len = mp->m_len; 782 if (len == 0) 783 continue; 784 (*le->sc_copytobuf)(mtod(mp, char *), lebuf, boff, len); 785 tlen += len; 786 boff += len; 787 } 788 m_freem(m); 789 if (tlen < LEMINSIZE) { 790 (*le->sc_zerobuf)(lebuf, boff, LEMINSIZE - tlen); 791 tlen = LEMINSIZE; 792 } 793 return(tlen); 794 } 795 796 /* 797 * Routine to copy from network buffer memory into mbufs. 798 */ 799 struct mbuf * 800 leget(le, lebuf, totlen, off, ifp) 801 struct le_softc *le; 802 volatile void *lebuf; 803 int totlen, off; 804 struct ifnet *ifp; 805 { 806 register struct mbuf *m; 807 struct mbuf *top = 0, **mp = ⊤ 808 register int len, resid, boff; 809 810 /* NOTE: sizeof(struct ether_header) should be even */ 811 boff = sizeof(struct ether_header); 812 if (off) { 813 /* NOTE: off should be even */ 814 boff += off + 2 * sizeof(u_short); 815 totlen -= 2 * sizeof(u_short); 816 resid = totlen - off; 817 } else 818 resid = totlen; 819 820 MGETHDR(m, M_DONTWAIT, MT_DATA); 821 if (m == 0) 822 return (0); 823 m->m_pkthdr.rcvif = ifp; 824 m->m_pkthdr.len = totlen; 825 m->m_len = MHLEN; 826 827 while (totlen > 0) { 828 if (top) { 829 MGET(m, M_DONTWAIT, MT_DATA); 830 if (m == 0) { 831 m_freem(top); 832 return (0); 833 } 834 m->m_len = MLEN; 835 } 836 837 if (resid >= MINCLSIZE) 838 MCLGET(m, M_DONTWAIT); 839 if (m->m_flags & M_EXT) 840 m->m_len = min(resid, MCLBYTES); 841 else if (resid < m->m_len) { 842 /* 843 * Place initial small packet/header at end of mbuf. 844 */ 845 if (top == 0 && resid + max_linkhdr <= m->m_len) 846 m->m_data += max_linkhdr; 847 m->m_len = resid; 848 } 849 len = m->m_len; 850 (*le->sc_copyfrombuf)(lebuf, boff, mtod(m, char *), len); 851 boff += len; 852 *mp = m; 853 mp = &m->m_next; 854 totlen -= len; 855 resid -= len; 856 if (resid == 0) { 857 boff = sizeof (struct ether_header); 858 resid = totlen; 859 } 860 } 861 return (top); 862 } 863 864 /* 865 * Process an ioctl request. 866 */ 867 leioctl(ifp, cmd, data) 868 register struct ifnet *ifp; 869 int cmd; 870 caddr_t data; 871 { 872 register struct ifaddr *ifa = (struct ifaddr *)data; 873 struct le_softc *le = &le_softc[ifp->if_unit]; 874 volatile struct lereg1 *ler1 = le->sc_r1; 875 int s, error = 0; 876 877 s = splnet(); 878 switch (cmd) { 879 880 case SIOCSIFADDR: 881 ifp->if_flags |= IFF_UP; 882 switch (ifa->ifa_addr->sa_family) { 883 #ifdef INET 884 case AF_INET: 885 leinit(ifp->if_unit); /* before arpwhohas */ 886 ((struct arpcom *)ifp)->ac_ipaddr = 887 IA_SIN(ifa)->sin_addr; 888 arpwhohas((struct arpcom *)ifp, &IA_SIN(ifa)->sin_addr); 889 break; 890 #endif 891 #ifdef NS 892 case AF_NS: 893 { 894 register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr); 895 896 if (ns_nullhost(*ina)) 897 ina->x_host = *(union ns_host *)(le->sc_addr); 898 else { 899 /* 900 * The manual says we can't change the address 901 * while the receiver is armed, 902 * so reset everything 903 */ 904 ifp->if_flags &= ~IFF_RUNNING; 905 LEWREG(LE_STOP, ler1->ler1_rdp); 906 bcopy((caddr_t)ina->x_host.c_host, 907 (caddr_t)le->sc_addr, sizeof(le->sc_addr)); 908 } 909 leinit(ifp->if_unit); /* does le_setaddr() */ 910 break; 911 } 912 #endif 913 default: 914 leinit(ifp->if_unit); 915 break; 916 } 917 break; 918 919 #if defined (CCITT) && defined (LLC) 920 case SIOCSIFCONF_X25: 921 ifp->if_flags |= IFF_UP; 922 ifa->ifa_rtrequest = cons_rtrequest; 923 error = x25_llcglue(PRC_IFUP, ifa->ifa_addr); 924 if (error == 0) 925 leinit(ifp->if_unit); 926 break; 927 #endif /* CCITT && LLC */ 928 929 case SIOCSIFFLAGS: 930 if ((ifp->if_flags & IFF_UP) == 0 && 931 ifp->if_flags & IFF_RUNNING) { 932 LEWREG(LE_STOP, ler1->ler1_rdp); 933 ifp->if_flags &= ~IFF_RUNNING; 934 } else if (ifp->if_flags & IFF_UP && 935 (ifp->if_flags & IFF_RUNNING) == 0) 936 leinit(ifp->if_unit); 937 /* 938 * If the state of the promiscuous bit changes, the interface 939 * must be reset to effect the change. 940 */ 941 if (((ifp->if_flags ^ le->sc_iflags) & IFF_PROMISC) && 942 (ifp->if_flags & IFF_RUNNING)) { 943 le->sc_iflags = ifp->if_flags; 944 lereset(ifp->if_unit); 945 lestart(ifp); 946 } 947 break; 948 949 #ifdef MULTICAST 950 case SIOCADDMULTI: 951 case SIOCDELMULTI: 952 /* Update our multicast list */ 953 error = (cmd == SIOCADDMULTI) ? 954 ether_addmulti((struct ifreq *)data, &le->sc_ac) : 955 ether_delmulti((struct ifreq *)data, &le->sc_ac); 956 957 if (error == ENETRESET) { 958 /* 959 * Multicast list has changed; set the hardware 960 * filter accordingly. 961 */ 962 lereset(ifp->if_unit); 963 error = 0; 964 } 965 break; 966 #endif 967 968 default: 969 error = EINVAL; 970 } 971 splx(s); 972 return (error); 973 } 974 975 leerror(unit, stat) 976 int unit; 977 int stat; 978 { 979 if (!ledebug) 980 return; 981 982 /* 983 * Not all transceivers implement heartbeat 984 * so we only log CERR once. 985 */ 986 if ((stat & LE_CERR) && le_softc[unit].sc_cerr) 987 return; 988 log(LOG_WARNING, 989 "le%d: error: stat=%b\n", unit, 990 stat, 991 "\20\20ERR\17BABL\16CERR\15MISS\14MERR\13RINT\12TINT\11IDON\10INTR\07INEA\06RXON\05TXON\04TDMD\03STOP\02STRT\01INIT"); 992 } 993 994 lererror(unit, msg) 995 int unit; 996 char *msg; 997 { 998 register struct le_softc *le = &le_softc[unit]; 999 register volatile void *rmd; 1000 u_char eaddr[6]; 1001 int len; 1002 1003 if (!ledebug) 1004 return; 1005 1006 rmd = LER2_RMDADDR(le->sc_r2, le->sc_rmd); 1007 len = LER2V_rmd3(rmd); 1008 if (len > 11) 1009 (*le->sc_copyfrombuf)(LER2_RBUFADDR(le->sc_r2, le->sc_rmd), 1010 6, eaddr, 6); 1011 log(LOG_WARNING, 1012 "le%d: ierror(%s): from %s: buf=%d, len=%d, rmd1=%b\n", 1013 unit, msg, 1014 len > 11 ? ether_sprintf(eaddr) : "unknown", 1015 le->sc_rmd, len, 1016 LER2V_rmd1(rmd), 1017 "\20\20OWN\17ERR\16FRAM\15OFLO\14CRC\13RBUF\12STP\11ENP"); 1018 } 1019 1020 lexerror(unit) 1021 int unit; 1022 { 1023 register struct le_softc *le = &le_softc[unit]; 1024 register volatile void *tmd; 1025 u_char eaddr[6]; 1026 int len; 1027 1028 if (!ledebug) 1029 return; 1030 1031 tmd = LER2_TMDADDR(le->sc_r2, 0); 1032 len = -LER2V_tmd2(tmd); 1033 if (len > 5) 1034 (*le->sc_copyfrombuf)(LER2_TBUFADDR(le->sc_r2, 0), 0, eaddr, 6); 1035 log(LOG_WARNING, 1036 "le%d: oerror: to %s: buf=%d, len=%d, tmd1=%b, tmd3=%b\n", 1037 unit, 1038 len > 5 ? ether_sprintf(eaddr) : "unknown", 1039 0, len, 1040 LER2V_tmd1(tmd), 1041 "\20\20OWN\17ERR\16RES\15MORE\14ONE\13DEF\12STP\11ENP", 1042 LER2V_tmd3(tmd), 1043 "\20\20BUFF\17UFLO\16RES\15LCOL\14LCAR\13RTRY"); 1044 } 1045 1046 /* 1047 * Write a lance register port, reading it back to ensure success. This seems 1048 * to be necessary during initialization, since the chip appears to be a bit 1049 * pokey sometimes. 1050 */ 1051 static void 1052 lewritereg(regptr, val) 1053 register volatile u_short *regptr; 1054 register u_short val; 1055 { 1056 register int i = 0; 1057 1058 while (*regptr != val) { 1059 *regptr = val; 1060 MachEmptyWriteBuffer(); 1061 if (++i > 10000) { 1062 printf("le: Reg did not settle (to x%x): x%x\n", 1063 val, *regptr); 1064 return; 1065 } 1066 DELAY(100); 1067 } 1068 } 1069 1070 /* 1071 * Routines for accessing the transmit and receive buffers. Unfortunately, 1072 * CPU addressing of these buffers is done in one of 3 ways: 1073 * - contiguous (for the 3max and turbochannel option card) 1074 * - gap2, which means shorts (2 bytes) interspersed with short (2 byte) 1075 * spaces (for the pmax) 1076 * - gap16, which means 16bytes interspersed with 16byte spaces 1077 * for buffers which must begin on a 32byte boundary (for 3min and maxine) 1078 * The buffer offset is the logical byte offset, assuming contiguous storage. 1079 */ 1080 void 1081 copytobuf_contig(from, lebuf, boff, len) 1082 char *from; 1083 volatile void *lebuf; 1084 int boff; 1085 int len; 1086 { 1087 1088 /* 1089 * Just call bcopy() to do the work. 1090 */ 1091 bcopy(from, ((char *)lebuf) + boff, len); 1092 } 1093 1094 void 1095 copyfrombuf_contig(lebuf, boff, to, len) 1096 volatile void *lebuf; 1097 int boff; 1098 char *to; 1099 int len; 1100 { 1101 1102 /* 1103 * Just call bcopy() to do the work. 1104 */ 1105 bcopy(((char *)lebuf) + boff, to, len); 1106 } 1107 1108 void 1109 bzerobuf_contig(lebuf, boff, len) 1110 volatile void *lebuf; 1111 int boff; 1112 int len; 1113 { 1114 1115 /* 1116 * Just let bzero() do the work 1117 */ 1118 bzero(((char *)lebuf) + boff, len); 1119 } 1120 1121 /* 1122 * For the pmax the buffer consists of shorts (2 bytes) interspersed with 1123 * short (2 byte) spaces and must be accessed with halfword load/stores. 1124 * (don't worry about doing an extra byte) 1125 */ 1126 void 1127 copytobuf_gap2(from, lebuf, boff, len) 1128 register char *from; 1129 volatile void *lebuf; 1130 int boff; 1131 register int len; 1132 { 1133 register volatile u_short *bptr; 1134 register int xfer; 1135 1136 if (boff & 0x1) { 1137 /* handle unaligned first byte */ 1138 bptr = ((volatile u_short *)lebuf) + (boff - 1); 1139 *bptr = (*from++ << 8) | (*bptr & 0xff); 1140 bptr += 2; 1141 len--; 1142 } else 1143 bptr = ((volatile u_short *)lebuf) + boff; 1144 if ((unsigned)from & 0x1) { 1145 while (len > 1) { 1146 *bptr = (from[1] << 8) | (from[0] & 0xff); 1147 bptr += 2; 1148 from += 2; 1149 len -= 2; 1150 } 1151 } else { 1152 /* optimize for aligned transfers */ 1153 xfer = (int)((unsigned)len & ~0x1); 1154 CopyToBuffer((u_short *)from, bptr, xfer); 1155 bptr += xfer; 1156 from += xfer; 1157 len -= xfer; 1158 } 1159 if (len == 1) 1160 *bptr = (u_short)*from; 1161 } 1162 1163 void 1164 copyfrombuf_gap2(lebuf, boff, to, len) 1165 volatile void *lebuf; 1166 int boff; 1167 register char *to; 1168 register int len; 1169 { 1170 register volatile u_short *bptr; 1171 register u_short tmp; 1172 register int xfer; 1173 1174 if (boff & 0x1) { 1175 /* handle unaligned first byte */ 1176 bptr = ((volatile u_short *)lebuf) + (boff - 1); 1177 *to++ = (*bptr >> 8) & 0xff; 1178 bptr += 2; 1179 len--; 1180 } else 1181 bptr = ((volatile u_short *)lebuf) + boff; 1182 if ((unsigned)to & 0x1) { 1183 while (len > 1) { 1184 tmp = *bptr; 1185 *to++ = tmp & 0xff; 1186 *to++ = (tmp >> 8) & 0xff; 1187 bptr += 2; 1188 len -= 2; 1189 } 1190 } else { 1191 /* optimize for aligned transfers */ 1192 xfer = (int)((unsigned)len & ~0x1); 1193 CopyFromBuffer(bptr, to, xfer); 1194 bptr += xfer; 1195 to += xfer; 1196 len -= xfer; 1197 } 1198 if (len == 1) 1199 *to = *bptr & 0xff; 1200 } 1201 1202 void 1203 bzerobuf_gap2(lebuf, boff, len) 1204 volatile void *lebuf; 1205 int boff; 1206 int len; 1207 { 1208 register volatile u_short *bptr; 1209 1210 if ((unsigned)boff & 0x1) { 1211 bptr = ((volatile u_short *)lebuf) + (boff - 1); 1212 *bptr &= 0xff; 1213 bptr += 2; 1214 len--; 1215 } else 1216 bptr = ((volatile u_short *)lebuf) + boff; 1217 while (len > 0) { 1218 *bptr = 0; 1219 bptr += 2; 1220 len -= 2; 1221 } 1222 } 1223 1224 /* 1225 * For the 3min and maxine, the buffers are in main memory filled in with 1226 * 16byte blocks interspersed with 16byte spaces. 1227 */ 1228 void 1229 copytobuf_gap16(from, lebuf, boff, len) 1230 register char *from; 1231 volatile void *lebuf; 1232 int boff; 1233 register int len; 1234 { 1235 register char *bptr; 1236 register int xfer; 1237 1238 bptr = ((char *)lebuf) + ((boff << 1) & ~0x1f); 1239 boff &= 0xf; 1240 xfer = min(len, 16 - boff); 1241 while (len > 0) { 1242 bcopy(from, ((char *)bptr) + boff, xfer); 1243 from += xfer; 1244 bptr += 32; 1245 boff = 0; 1246 len -= xfer; 1247 xfer = min(len, 16); 1248 } 1249 } 1250 1251 void 1252 copyfrombuf_gap16(lebuf, boff, to, len) 1253 volatile void *lebuf; 1254 int boff; 1255 register char *to; 1256 register int len; 1257 { 1258 register char *bptr; 1259 register int xfer; 1260 1261 bptr = ((char *)lebuf) + ((boff << 1) & ~0x1f); 1262 boff &= 0xf; 1263 xfer = min(len, 16 - boff); 1264 while (len > 0) { 1265 bcopy(((char *)bptr) + boff, to, xfer); 1266 to += xfer; 1267 bptr += 32; 1268 boff = 0; 1269 len -= xfer; 1270 xfer = min(len, 16); 1271 } 1272 } 1273 1274 void 1275 bzerobuf_gap16(lebuf, boff, len) 1276 volatile void *lebuf; 1277 int boff; 1278 register int len; 1279 { 1280 register char *bptr; 1281 register int xfer; 1282 1283 bptr = ((char *)lebuf) + ((boff << 1) & ~0x1f); 1284 boff &= 0xf; 1285 xfer = min(len, 16 - boff); 1286 while (len > 0) { 1287 bzero(((char *)bptr) + boff, xfer); 1288 bptr += 32; 1289 boff = 0; 1290 len -= xfer; 1291 xfer = min(len, 16); 1292 } 1293 } 1294 #endif /* NLE */ 1295