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 8.4 (Berkeley) 10/09/94 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 if (ifp->if_addrlist == NULL) 438 return; 439 if ((ifp->if_flags & IFF_RUNNING) == 0) { 440 s = splnet(); 441 ifp->if_flags |= IFF_RUNNING; 442 lereset(unit); 443 (void) lestart(ifp); 444 splx(s); 445 } 446 } 447 448 #define LENEXTTMP \ 449 if (++bix == LETBUF) \ 450 bix = 0; \ 451 tmd = LER2_TMDADDR(le->sc_r2, bix) 452 453 /* 454 * Start output on interface. Get another datagram to send 455 * off of the interface queue, and copy it to the interface 456 * before starting the output. 457 */ 458 lestart(ifp) 459 struct ifnet *ifp; 460 { 461 register struct le_softc *le = &le_softc[ifp->if_unit]; 462 register int bix = le->sc_tmdnext; 463 register volatile void *tmd = LER2_TMDADDR(le->sc_r2, bix); 464 register struct mbuf *m; 465 int len = 0; 466 467 if ((le->sc_if.if_flags & IFF_RUNNING) == 0) 468 return (0); 469 while (bix != le->sc_tmd) { 470 if (LER2V_tmd1(tmd) & LE_OWN) 471 panic("lestart"); 472 IF_DEQUEUE(&le->sc_if.if_snd, m); 473 if (m == 0) 474 break; 475 #if NBPFILTER > 0 476 /* 477 * If bpf is listening on this interface, let it 478 * see the packet before we commit it to the wire. 479 */ 480 if (ifp->if_bpf) 481 bpf_mtap(ifp->if_bpf, m); 482 #endif 483 len = leput(le, LER2_TBUFADDR(le->sc_r2, bix), m); 484 LER2_tmd3(tmd, 0); 485 LER2_tmd2(tmd, -len); 486 LER2_tmd1(tmd, LE_OWN | LE_STP | LE_ENP); 487 LENEXTTMP; 488 } 489 if (len != 0) { 490 le->sc_if.if_flags |= IFF_OACTIVE; 491 LERDWR(ler0, LE_TDMD | LE_INEA, le->sc_r1->ler1_rdp); 492 } 493 le->sc_tmdnext = bix; 494 return (0); 495 } 496 497 /* 498 * Process interrupts from the 7990 chip. 499 */ 500 void 501 leintr(unit) 502 int unit; 503 { 504 register struct le_softc *le; 505 register volatile struct lereg1 *ler1; 506 register int stat; 507 508 le = &le_softc[unit]; 509 ler1 = le->sc_r1; 510 stat = ler1->ler1_rdp; 511 if (!(stat & LE_INTR)) { 512 printf("le%d: spurrious interrupt\n", unit); 513 return; 514 } 515 if (stat & LE_SERR) { 516 leerror(unit, stat); 517 if (stat & LE_MERR) { 518 le->sc_merr++; 519 lereset(unit); 520 return; 521 } 522 if (stat & LE_BABL) 523 le->sc_babl++; 524 if (stat & LE_CERR) 525 le->sc_cerr++; 526 if (stat & LE_MISS) 527 le->sc_miss++; 528 LERDWR(ler0, LE_BABL|LE_CERR|LE_MISS|LE_INEA, ler1->ler1_rdp); 529 } 530 if ((stat & LE_RXON) == 0) { 531 le->sc_rxoff++; 532 lereset(unit); 533 return; 534 } 535 if ((stat & LE_TXON) == 0) { 536 le->sc_txoff++; 537 lereset(unit); 538 return; 539 } 540 if (stat & LE_RINT) { 541 /* interrupt is cleared in lerint */ 542 lerint(unit); 543 } 544 if (stat & LE_TINT) { 545 LERDWR(ler0, LE_TINT|LE_INEA, ler1->ler1_rdp); 546 lexint(unit); 547 } 548 } 549 550 /* 551 * Ethernet interface transmitter interrupt. 552 * Start another output if more data to send. 553 */ 554 lexint(unit) 555 register int unit; 556 { 557 register struct le_softc *le = &le_softc[unit]; 558 register int bix = le->sc_tmd; 559 register volatile void *tmd; 560 561 if ((le->sc_if.if_flags & IFF_OACTIVE) == 0) { 562 le->sc_xint++; 563 return; 564 } 565 LENEXTTMP; 566 while (bix != le->sc_tmdnext && (LER2V_tmd1(tmd) & LE_OWN) == 0) { 567 le->sc_tmd = bix; 568 if ((LER2V_tmd1(tmd) & LE_ERR) || (LER2V_tmd3(tmd) & LE_TBUFF)) { 569 lexerror(unit); 570 le->sc_if.if_oerrors++; 571 if (LER2V_tmd3(tmd) & (LE_TBUFF|LE_UFLO)) { 572 le->sc_uflo++; 573 lereset(unit); 574 break; 575 } 576 else if (LER2V_tmd3(tmd) & LE_LCOL) 577 le->sc_if.if_collisions++; 578 else if (LER2V_tmd3(tmd) & LE_RTRY) 579 le->sc_if.if_collisions += 16; 580 } 581 else if (LER2V_tmd1(tmd) & LE_ONE) 582 le->sc_if.if_collisions++; 583 else if (LER2V_tmd1(tmd) & LE_MORE) 584 /* what is the real number? */ 585 le->sc_if.if_collisions += 2; 586 else 587 le->sc_if.if_opackets++; 588 LENEXTTMP; 589 } 590 if (bix == le->sc_tmdnext) 591 le->sc_if.if_flags &= ~IFF_OACTIVE; 592 (void) lestart(&le->sc_if); 593 } 594 595 #define LENEXTRMP \ 596 if (++bix == LERBUF) \ 597 bix = 0; \ 598 rmd = LER2_RMDADDR(le->sc_r2, bix) 599 600 /* 601 * Ethernet interface receiver interrupt. 602 * If input error just drop packet. 603 * Decapsulate packet based on type and pass to type specific 604 * higher-level input routine. 605 */ 606 lerint(unit) 607 int unit; 608 { 609 register struct le_softc *le = &le_softc[unit]; 610 register int bix = le->sc_rmd; 611 register volatile void *rmd = LER2_RMDADDR(le->sc_r2, bix); 612 613 /* 614 * Out of sync with hardware, should never happen? 615 */ 616 if (LER2V_rmd1(rmd) & LE_OWN) { 617 le->sc_rown++; 618 LERDWR(le->sc_r0, LE_RINT|LE_INEA, le->sc_r1->ler1_rdp); 619 return; 620 } 621 622 /* 623 * Process all buffers with valid data 624 */ 625 while ((LER2V_rmd1(rmd) & LE_OWN) == 0) { 626 int len = LER2V_rmd3(rmd); 627 628 /* Clear interrupt to avoid race condition */ 629 LERDWR(le->sc_r0, LE_RINT|LE_INEA, le->sc_r1->ler1_rdp); 630 631 if (LER2V_rmd1(rmd) & LE_ERR) { 632 le->sc_rmd = bix; 633 lererror(unit, "bad packet"); 634 le->sc_if.if_ierrors++; 635 } else if ((LER2V_rmd1(rmd) & (LE_STP|LE_ENP)) != (LE_STP|LE_ENP)) { 636 /* 637 * Find the end of the packet so we can see how long 638 * it was. We still throw it away. 639 */ 640 do { 641 LERDWR(le->sc_r0, LE_RINT|LE_INEA, 642 le->sc_r1->ler1_rdp); 643 LER2_rmd3(rmd, 0); 644 LER2_rmd1(rmd, LE_OWN); 645 LENEXTRMP; 646 } while (!(LER2V_rmd1(rmd) & (LE_OWN|LE_ERR|LE_STP|LE_ENP))); 647 le->sc_rmd = bix; 648 lererror(unit, "chained buffer"); 649 le->sc_rxlen++; 650 /* 651 * If search terminated without successful completion 652 * we reset the hardware (conservative). 653 */ 654 if ((LER2V_rmd1(rmd) & (LE_OWN|LE_ERR|LE_STP|LE_ENP)) != 655 LE_ENP) { 656 lereset(unit); 657 return; 658 } 659 } else 660 leread(unit, LER2_RBUFADDR(le->sc_r2, bix), len); 661 LER2_rmd3(rmd, 0); 662 LER2_rmd1(rmd, LE_OWN); 663 LENEXTRMP; 664 } 665 MachEmptyWriteBuffer(); /* Paranoia */ 666 le->sc_rmd = bix; 667 } 668 669 /* 670 * Look at the packet in network buffer memory so we can be smart about how 671 * we copy the data into mbufs. 672 * This needs work since we can't just read network buffer memory like 673 * regular memory. 674 */ 675 leread(unit, buf, len) 676 int unit; 677 volatile void *buf; 678 int len; 679 { 680 register struct le_softc *le = &le_softc[unit]; 681 struct ether_header et; 682 struct mbuf *m; 683 int off, resid, flags; 684 u_short sbuf[2], eth_type; 685 extern struct mbuf *leget(); 686 687 le->sc_if.if_ipackets++; 688 (*le->sc_copyfrombuf)(buf, 0, (char *)&et, sizeof (et)); 689 eth_type = ntohs(et.ether_type); 690 /* adjust input length to account for header and CRC */ 691 len = len - sizeof(struct ether_header) - 4; 692 693 if (eth_type >= ETHERTYPE_TRAIL && 694 eth_type < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) { 695 off = (eth_type - ETHERTYPE_TRAIL) * 512; 696 if (off >= ETHERMTU) 697 return; /* sanity */ 698 (*le->sc_copyfrombuf)(buf, sizeof (et) + off, (char *)sbuf, 699 sizeof (sbuf)); 700 eth_type = ntohs(sbuf[0]); 701 resid = ntohs(sbuf[1]); 702 if (off + resid > len) 703 return; /* sanity */ 704 len = off + resid; 705 } else 706 off = 0; 707 708 if (len <= 0) { 709 if (ledebug) 710 log(LOG_WARNING, 711 "le%d: ierror(runt packet): from %s: len=%d\n", 712 unit, ether_sprintf(et.ether_shost), len); 713 le->sc_runt++; 714 le->sc_if.if_ierrors++; 715 return; 716 } 717 flags = 0; 718 if (bcmp((caddr_t)etherbroadcastaddr, 719 (caddr_t)et.ether_dhost, sizeof(etherbroadcastaddr)) == 0) 720 flags |= M_BCAST; 721 if (et.ether_dhost[0] & 1) 722 flags |= M_MCAST; 723 724 /* 725 * Pull packet off interface. Off is nonzero if packet 726 * has trailing header; leget will then force this header 727 * information to be at the front, but we still have to drop 728 * the type and length which are at the front of any trailer data. 729 */ 730 m = leget(le, buf, len, off, &le->sc_if); 731 if (m == 0) 732 return; 733 #if NBPFILTER > 0 734 /* 735 * Check if there's a bpf filter listening on this interface. 736 * If so, hand off the raw packet to enet. 737 */ 738 if (le->sc_if.if_bpf) { 739 bpf_mtap(le->sc_if.if_bpf, m); 740 741 /* 742 * Keep the packet if it's a broadcast or has our 743 * physical ethernet address (or if we support 744 * multicast and it's one). 745 */ 746 if ( 747 #ifdef MULTICAST 748 (flags & (M_BCAST | M_MCAST)) == 0 && 749 #else 750 (flags & M_BCAST) == 0 && 751 #endif 752 bcmp(et.ether_dhost, le->sc_addr, 753 sizeof(et.ether_dhost)) != 0) { 754 m_freem(m); 755 return; 756 } 757 } 758 #endif 759 m->m_flags |= flags; 760 et.ether_type = eth_type; 761 ether_input(&le->sc_if, &et, m); 762 } 763 764 /* 765 * Routine to copy from mbuf chain to transmit buffer in 766 * network buffer memory. 767 */ 768 leput(le, lebuf, m) 769 struct le_softc *le; 770 register volatile void *lebuf; 771 register struct mbuf *m; 772 { 773 register struct mbuf *mp; 774 register int len, tlen = 0; 775 register int boff = 0; 776 777 for (mp = m; mp; mp = mp->m_next) { 778 len = mp->m_len; 779 if (len == 0) 780 continue; 781 (*le->sc_copytobuf)(mtod(mp, char *), lebuf, boff, len); 782 tlen += len; 783 boff += len; 784 } 785 m_freem(m); 786 if (tlen < LEMINSIZE) { 787 (*le->sc_zerobuf)(lebuf, boff, LEMINSIZE - tlen); 788 tlen = LEMINSIZE; 789 } 790 return(tlen); 791 } 792 793 /* 794 * Routine to copy from network buffer memory into mbufs. 795 */ 796 struct mbuf * 797 leget(le, lebuf, totlen, off, ifp) 798 struct le_softc *le; 799 volatile void *lebuf; 800 int totlen, off; 801 struct ifnet *ifp; 802 { 803 register struct mbuf *m; 804 struct mbuf *top = 0, **mp = ⊤ 805 register int len, resid, boff; 806 807 /* NOTE: sizeof(struct ether_header) should be even */ 808 boff = sizeof(struct ether_header); 809 if (off) { 810 /* NOTE: off should be even */ 811 boff += off + 2 * sizeof(u_short); 812 totlen -= 2 * sizeof(u_short); 813 resid = totlen - off; 814 } else 815 resid = totlen; 816 817 MGETHDR(m, M_DONTWAIT, MT_DATA); 818 if (m == 0) 819 return (0); 820 m->m_pkthdr.rcvif = ifp; 821 m->m_pkthdr.len = totlen; 822 m->m_len = MHLEN; 823 824 while (totlen > 0) { 825 if (top) { 826 MGET(m, M_DONTWAIT, MT_DATA); 827 if (m == 0) { 828 m_freem(top); 829 return (0); 830 } 831 m->m_len = MLEN; 832 } 833 834 if (resid >= MINCLSIZE) 835 MCLGET(m, M_DONTWAIT); 836 if (m->m_flags & M_EXT) 837 m->m_len = min(resid, MCLBYTES); 838 else if (resid < m->m_len) { 839 /* 840 * Place initial small packet/header at end of mbuf. 841 */ 842 if (top == 0 && resid + max_linkhdr <= m->m_len) 843 m->m_data += max_linkhdr; 844 m->m_len = resid; 845 } 846 len = m->m_len; 847 (*le->sc_copyfrombuf)(lebuf, boff, mtod(m, char *), len); 848 boff += len; 849 *mp = m; 850 mp = &m->m_next; 851 totlen -= len; 852 resid -= len; 853 if (resid == 0) { 854 boff = sizeof (struct ether_header); 855 resid = totlen; 856 } 857 } 858 return (top); 859 } 860 861 /* 862 * Process an ioctl request. 863 */ 864 leioctl(ifp, cmd, data) 865 register struct ifnet *ifp; 866 int cmd; 867 caddr_t data; 868 { 869 register struct ifaddr *ifa = (struct ifaddr *)data; 870 struct le_softc *le = &le_softc[ifp->if_unit]; 871 volatile struct lereg1 *ler1 = le->sc_r1; 872 int s, error = 0; 873 874 s = splnet(); 875 switch (cmd) { 876 877 case SIOCSIFADDR: 878 ifp->if_flags |= IFF_UP; 879 switch (ifa->ifa_addr->sa_family) { 880 #ifdef INET 881 case AF_INET: 882 leinit(ifp->if_unit); /* before arpwhohas */ 883 ((struct arpcom *)ifp)->ac_ipaddr = 884 IA_SIN(ifa)->sin_addr; 885 arpwhohas((struct arpcom *)ifp, &IA_SIN(ifa)->sin_addr); 886 break; 887 #endif 888 #ifdef NS 889 case AF_NS: 890 { 891 register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr); 892 893 if (ns_nullhost(*ina)) 894 ina->x_host = *(union ns_host *)(le->sc_addr); 895 else { 896 /* 897 * The manual says we can't change the address 898 * while the receiver is armed, 899 * so reset everything 900 */ 901 ifp->if_flags &= ~IFF_RUNNING; 902 LEWREG(LE_STOP, ler1->ler1_rdp); 903 bcopy((caddr_t)ina->x_host.c_host, 904 (caddr_t)le->sc_addr, sizeof(le->sc_addr)); 905 } 906 leinit(ifp->if_unit); /* does le_setaddr() */ 907 break; 908 } 909 #endif 910 default: 911 leinit(ifp->if_unit); 912 break; 913 } 914 break; 915 916 #if defined (CCITT) && defined (LLC) 917 case SIOCSIFCONF_X25: 918 ifp->if_flags |= IFF_UP; 919 ifa->ifa_rtrequest = cons_rtrequest; 920 error = x25_llcglue(PRC_IFUP, ifa->ifa_addr); 921 if (error == 0) 922 leinit(ifp->if_unit); 923 break; 924 #endif /* CCITT && LLC */ 925 926 case SIOCSIFFLAGS: 927 if ((ifp->if_flags & IFF_UP) == 0 && 928 ifp->if_flags & IFF_RUNNING) { 929 LEWREG(LE_STOP, ler1->ler1_rdp); 930 ifp->if_flags &= ~IFF_RUNNING; 931 } else if (ifp->if_flags & IFF_UP && 932 (ifp->if_flags & IFF_RUNNING) == 0) 933 leinit(ifp->if_unit); 934 /* 935 * If the state of the promiscuous bit changes, the interface 936 * must be reset to effect the change. 937 */ 938 if (((ifp->if_flags ^ le->sc_iflags) & IFF_PROMISC) && 939 (ifp->if_flags & IFF_RUNNING)) { 940 le->sc_iflags = ifp->if_flags; 941 lereset(ifp->if_unit); 942 lestart(ifp); 943 } 944 break; 945 946 #ifdef MULTICAST 947 case SIOCADDMULTI: 948 case SIOCDELMULTI: 949 /* Update our multicast list */ 950 error = (cmd == SIOCADDMULTI) ? 951 ether_addmulti((struct ifreq *)data, &le->sc_ac) : 952 ether_delmulti((struct ifreq *)data, &le->sc_ac); 953 954 if (error == ENETRESET) { 955 /* 956 * Multicast list has changed; set the hardware 957 * filter accordingly. 958 */ 959 lereset(ifp->if_unit); 960 error = 0; 961 } 962 break; 963 #endif 964 965 default: 966 error = EINVAL; 967 } 968 splx(s); 969 return (error); 970 } 971 972 leerror(unit, stat) 973 int unit; 974 int stat; 975 { 976 if (!ledebug) 977 return; 978 979 /* 980 * Not all transceivers implement heartbeat 981 * so we only log CERR once. 982 */ 983 if ((stat & LE_CERR) && le_softc[unit].sc_cerr) 984 return; 985 log(LOG_WARNING, 986 "le%d: error: stat=%b\n", unit, 987 stat, 988 "\20\20ERR\17BABL\16CERR\15MISS\14MERR\13RINT\12TINT\11IDON\10INTR\07INEA\06RXON\05TXON\04TDMD\03STOP\02STRT\01INIT"); 989 } 990 991 lererror(unit, msg) 992 int unit; 993 char *msg; 994 { 995 register struct le_softc *le = &le_softc[unit]; 996 register volatile void *rmd; 997 u_char eaddr[6]; 998 int len; 999 1000 if (!ledebug) 1001 return; 1002 1003 rmd = LER2_RMDADDR(le->sc_r2, le->sc_rmd); 1004 len = LER2V_rmd3(rmd); 1005 if (len > 11) 1006 (*le->sc_copyfrombuf)(LER2_RBUFADDR(le->sc_r2, le->sc_rmd), 1007 6, eaddr, 6); 1008 log(LOG_WARNING, 1009 "le%d: ierror(%s): from %s: buf=%d, len=%d, rmd1=%b\n", 1010 unit, msg, 1011 len > 11 ? ether_sprintf(eaddr) : "unknown", 1012 le->sc_rmd, len, 1013 LER2V_rmd1(rmd), 1014 "\20\20OWN\17ERR\16FRAM\15OFLO\14CRC\13RBUF\12STP\11ENP"); 1015 } 1016 1017 lexerror(unit) 1018 int unit; 1019 { 1020 register struct le_softc *le = &le_softc[unit]; 1021 register volatile void *tmd; 1022 u_char eaddr[6]; 1023 int len; 1024 1025 if (!ledebug) 1026 return; 1027 1028 tmd = LER2_TMDADDR(le->sc_r2, 0); 1029 len = -LER2V_tmd2(tmd); 1030 if (len > 5) 1031 (*le->sc_copyfrombuf)(LER2_TBUFADDR(le->sc_r2, 0), 0, eaddr, 6); 1032 log(LOG_WARNING, 1033 "le%d: oerror: to %s: buf=%d, len=%d, tmd1=%b, tmd3=%b\n", 1034 unit, 1035 len > 5 ? ether_sprintf(eaddr) : "unknown", 1036 0, len, 1037 LER2V_tmd1(tmd), 1038 "\20\20OWN\17ERR\16RES\15MORE\14ONE\13DEF\12STP\11ENP", 1039 LER2V_tmd3(tmd), 1040 "\20\20BUFF\17UFLO\16RES\15LCOL\14LCAR\13RTRY"); 1041 } 1042 1043 /* 1044 * Write a lance register port, reading it back to ensure success. This seems 1045 * to be necessary during initialization, since the chip appears to be a bit 1046 * pokey sometimes. 1047 */ 1048 static void 1049 lewritereg(regptr, val) 1050 register volatile u_short *regptr; 1051 register u_short val; 1052 { 1053 register int i = 0; 1054 1055 while (*regptr != val) { 1056 *regptr = val; 1057 MachEmptyWriteBuffer(); 1058 if (++i > 10000) { 1059 printf("le: Reg did not settle (to x%x): x%x\n", 1060 val, *regptr); 1061 return; 1062 } 1063 DELAY(100); 1064 } 1065 } 1066 1067 /* 1068 * Routines for accessing the transmit and receive buffers. Unfortunately, 1069 * CPU addressing of these buffers is done in one of 3 ways: 1070 * - contiguous (for the 3max and turbochannel option card) 1071 * - gap2, which means shorts (2 bytes) interspersed with short (2 byte) 1072 * spaces (for the pmax) 1073 * - gap16, which means 16bytes interspersed with 16byte spaces 1074 * for buffers which must begin on a 32byte boundary (for 3min and maxine) 1075 * The buffer offset is the logical byte offset, assuming contiguous storage. 1076 */ 1077 void 1078 copytobuf_contig(from, lebuf, boff, len) 1079 char *from; 1080 volatile void *lebuf; 1081 int boff; 1082 int len; 1083 { 1084 1085 /* 1086 * Just call bcopy() to do the work. 1087 */ 1088 bcopy(from, ((char *)lebuf) + boff, len); 1089 } 1090 1091 void 1092 copyfrombuf_contig(lebuf, boff, to, len) 1093 volatile void *lebuf; 1094 int boff; 1095 char *to; 1096 int len; 1097 { 1098 1099 /* 1100 * Just call bcopy() to do the work. 1101 */ 1102 bcopy(((char *)lebuf) + boff, to, len); 1103 } 1104 1105 void 1106 bzerobuf_contig(lebuf, boff, len) 1107 volatile void *lebuf; 1108 int boff; 1109 int len; 1110 { 1111 1112 /* 1113 * Just let bzero() do the work 1114 */ 1115 bzero(((char *)lebuf) + boff, len); 1116 } 1117 1118 /* 1119 * For the pmax the buffer consists of shorts (2 bytes) interspersed with 1120 * short (2 byte) spaces and must be accessed with halfword load/stores. 1121 * (don't worry about doing an extra byte) 1122 */ 1123 void 1124 copytobuf_gap2(from, lebuf, boff, len) 1125 register char *from; 1126 volatile void *lebuf; 1127 int boff; 1128 register int len; 1129 { 1130 register volatile u_short *bptr; 1131 register int xfer; 1132 1133 if (boff & 0x1) { 1134 /* handle unaligned first byte */ 1135 bptr = ((volatile u_short *)lebuf) + (boff - 1); 1136 *bptr = (*from++ << 8) | (*bptr & 0xff); 1137 bptr += 2; 1138 len--; 1139 } else 1140 bptr = ((volatile u_short *)lebuf) + boff; 1141 if ((unsigned)from & 0x1) { 1142 while (len > 1) { 1143 *bptr = (from[1] << 8) | (from[0] & 0xff); 1144 bptr += 2; 1145 from += 2; 1146 len -= 2; 1147 } 1148 } else { 1149 /* optimize for aligned transfers */ 1150 xfer = (int)((unsigned)len & ~0x1); 1151 CopyToBuffer((u_short *)from, bptr, xfer); 1152 bptr += xfer; 1153 from += xfer; 1154 len -= xfer; 1155 } 1156 if (len == 1) 1157 *bptr = (u_short)*from; 1158 } 1159 1160 void 1161 copyfrombuf_gap2(lebuf, boff, to, len) 1162 volatile void *lebuf; 1163 int boff; 1164 register char *to; 1165 register int len; 1166 { 1167 register volatile u_short *bptr; 1168 register u_short tmp; 1169 register int xfer; 1170 1171 if (boff & 0x1) { 1172 /* handle unaligned first byte */ 1173 bptr = ((volatile u_short *)lebuf) + (boff - 1); 1174 *to++ = (*bptr >> 8) & 0xff; 1175 bptr += 2; 1176 len--; 1177 } else 1178 bptr = ((volatile u_short *)lebuf) + boff; 1179 if ((unsigned)to & 0x1) { 1180 while (len > 1) { 1181 tmp = *bptr; 1182 *to++ = tmp & 0xff; 1183 *to++ = (tmp >> 8) & 0xff; 1184 bptr += 2; 1185 len -= 2; 1186 } 1187 } else { 1188 /* optimize for aligned transfers */ 1189 xfer = (int)((unsigned)len & ~0x1); 1190 CopyFromBuffer(bptr, to, xfer); 1191 bptr += xfer; 1192 to += xfer; 1193 len -= xfer; 1194 } 1195 if (len == 1) 1196 *to = *bptr & 0xff; 1197 } 1198 1199 void 1200 bzerobuf_gap2(lebuf, boff, len) 1201 volatile void *lebuf; 1202 int boff; 1203 int len; 1204 { 1205 register volatile u_short *bptr; 1206 1207 if ((unsigned)boff & 0x1) { 1208 bptr = ((volatile u_short *)lebuf) + (boff - 1); 1209 *bptr &= 0xff; 1210 bptr += 2; 1211 len--; 1212 } else 1213 bptr = ((volatile u_short *)lebuf) + boff; 1214 while (len > 0) { 1215 *bptr = 0; 1216 bptr += 2; 1217 len -= 2; 1218 } 1219 } 1220 1221 /* 1222 * For the 3min and maxine, the buffers are in main memory filled in with 1223 * 16byte blocks interspersed with 16byte spaces. 1224 */ 1225 void 1226 copytobuf_gap16(from, lebuf, boff, len) 1227 register char *from; 1228 volatile void *lebuf; 1229 int boff; 1230 register int len; 1231 { 1232 register char *bptr; 1233 register int xfer; 1234 1235 bptr = ((char *)lebuf) + ((boff << 1) & ~0x1f); 1236 boff &= 0xf; 1237 xfer = min(len, 16 - boff); 1238 while (len > 0) { 1239 bcopy(from, ((char *)bptr) + boff, xfer); 1240 from += xfer; 1241 bptr += 32; 1242 boff = 0; 1243 len -= xfer; 1244 xfer = min(len, 16); 1245 } 1246 } 1247 1248 void 1249 copyfrombuf_gap16(lebuf, boff, to, len) 1250 volatile void *lebuf; 1251 int boff; 1252 register char *to; 1253 register int len; 1254 { 1255 register char *bptr; 1256 register int xfer; 1257 1258 bptr = ((char *)lebuf) + ((boff << 1) & ~0x1f); 1259 boff &= 0xf; 1260 xfer = min(len, 16 - boff); 1261 while (len > 0) { 1262 bcopy(((char *)bptr) + boff, to, xfer); 1263 to += xfer; 1264 bptr += 32; 1265 boff = 0; 1266 len -= xfer; 1267 xfer = min(len, 16); 1268 } 1269 } 1270 1271 void 1272 bzerobuf_gap16(lebuf, boff, len) 1273 volatile void *lebuf; 1274 int boff; 1275 register int len; 1276 { 1277 register char *bptr; 1278 register int xfer; 1279 1280 bptr = ((char *)lebuf) + ((boff << 1) & ~0x1f); 1281 boff &= 0xf; 1282 xfer = min(len, 16 - boff); 1283 while (len > 0) { 1284 bzero(((char *)bptr) + boff, xfer); 1285 bptr += 32; 1286 boff = 0; 1287 len -= xfer; 1288 xfer = min(len, 16); 1289 } 1290 } 1291 #endif /* NLE */ 1292