1 /* 2 * Copyright (c) 1982 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 * 6 * @(#)if_ec.c 6.11 (Berkeley) 08/09/85 7 */ 8 9 #include "ec.h" 10 11 /* 12 * 3Com Ethernet Controller interface 13 */ 14 #include "../machine/pte.h" 15 16 #include "param.h" 17 #include "systm.h" 18 #include "mbuf.h" 19 #include "buf.h" 20 #include "protosw.h" 21 #include "socket.h" 22 #include "vmmac.h" 23 #include "ioctl.h" 24 #include "errno.h" 25 26 #include "../net/if.h" 27 #include "../net/netisr.h" 28 #include "../net/route.h" 29 30 #ifdef INET 31 #include "../netinet/in.h" 32 #include "../netinet/in_systm.h" 33 #include "../netinet/in_var.h" 34 #include "../netinet/ip.h" 35 #include "../netinet/ip_var.h" 36 #include "../netinet/if_ether.h" 37 #endif 38 39 #ifdef PUP 40 #include "../netpup/pup.h" 41 #endif PUP 42 43 #ifdef NS 44 #include "../netns/ns.h" 45 #include "../netns/ns_if.h" 46 #endif 47 48 #include "../vax/cpu.h" 49 #include "../vax/mtpr.h" 50 #include "if_ecreg.h" 51 #include "if_uba.h" 52 #include "../vaxuba/ubareg.h" 53 #include "../vaxuba/ubavar.h" 54 55 #if CLSIZE == 2 56 #define ECBUFSIZE 32 /* on-board memory, clusters */ 57 #endif 58 59 int ecubamem(), ecprobe(), ecattach(), ecrint(), ecxint(), eccollide(); 60 struct uba_device *ecinfo[NEC]; 61 u_short ecstd[] = { 0 }; 62 struct uba_driver ecdriver = 63 { ecprobe, 0, ecattach, 0, ecstd, "ec", ecinfo, 0, 0, 0, ecubamem }; 64 65 int ecinit(),ecioctl(),ecoutput(),ecreset(); 66 struct mbuf *ecget(); 67 68 extern struct ifnet loif; 69 70 /* 71 * Ethernet software status per interface. 72 * 73 * Each interface is referenced by a network interface structure, 74 * es_if, which the routing code uses to locate the interface. 75 * This structure contains the output queue for the interface, its address, ... 76 * We also have, for each interface, a UBA interface structure, which 77 * contains information about the UNIBUS resources held by the interface: 78 * map registers, buffered data paths, etc. Information is cached in this 79 * structure for use by the if_uba.c routines in running the interface 80 * efficiently. 81 */ 82 struct ec_softc { 83 struct arpcom es_ac; /* common Ethernet structures */ 84 #define es_if es_ac.ac_if /* network-visible interface */ 85 #define es_addr es_ac.ac_enaddr /* hardware Ethernet address */ 86 struct ifuba es_ifuba; /* UNIBUS resources */ 87 short es_mask; /* mask for current output delay */ 88 short es_oactive; /* is output active? */ 89 u_char *es_buf[16]; /* virtual addresses of buffers */ 90 } ec_softc[NEC]; 91 92 #ifdef DEBUG 93 ether_addr(s) 94 char *s; 95 { 96 97 printf("%x:%x:%x:%x:%x:%x\n", 98 s[0]&0xff, s[1]&0xff, s[2]&0xff, 99 s[3]&0xff, s[4]&0xff, s[5]&0xff); 100 } 101 #endif 102 103 /* 104 * Configure on-board memory for an interface. 105 * Called from autoconfig and after a uba reset. 106 * The address of the memory on the uba is supplied in the device flags. 107 */ 108 ecubamem(ui, uban) 109 register struct uba_device *ui; 110 { 111 register caddr_t ecbuf = (caddr_t) &umem[uban][ui->ui_flags]; 112 register struct ecdevice *addr = (struct ecdevice *)ui->ui_addr; 113 114 /* 115 * Make sure csr is there (we run before ecprobe). 116 */ 117 if (badaddr((caddr_t)addr, 2)) 118 return (-1); 119 #if VAX780 120 if (cpu == VAX_780 && uba_hd[uban].uh_uba->uba_sr) { 121 uba_hd[uban].uh_uba->uba_sr = uba_hd[uban].uh_uba->uba_sr; 122 return (-1); 123 } 124 #endif 125 /* 126 * Make sure memory is turned on 127 */ 128 addr->ec_rcr = EC_AROM; 129 /* 130 * Tell the system that the board has memory here, so it won't 131 * attempt to allocate the addresses later. 132 */ 133 if (ubamem(uban, ui->ui_flags, ECBUFSIZE*CLSIZE, 1) == 0) { 134 printf("ec%d: cannot reserve uba addresses\n", ui->ui_unit); 135 addr->ec_rcr = EC_MDISAB; /* disable memory */ 136 return (-1); 137 } 138 /* 139 * Check for existence of buffers on Unibus. 140 */ 141 if (badaddr((caddr_t)ecbuf, 2)) { 142 bad: 143 printf("ec%d: buffer mem not found\n", ui->ui_unit); 144 (void) ubamem(uban, ui->ui_flags, ECBUFSIZE*2, 0); 145 addr->ec_rcr = EC_MDISAB; /* disable memory */ 146 return (-1); 147 } 148 #if VAX780 149 if (cpu == VAX_780 && uba_hd[uban].uh_uba->uba_sr) { 150 uba_hd[uban].uh_uba->uba_sr = uba_hd[uban].uh_uba->uba_sr; 151 goto bad; 152 } 153 #endif 154 if (ui->ui_alive == 0) /* Only printf from autoconfig */ 155 printf("ec%d: mem %x-%x\n", ui->ui_unit, 156 ui->ui_flags, ui->ui_flags + ECBUFSIZE*CLBYTES - 1); 157 ui->ui_type = 1; /* Memory on, allocated */ 158 return (0); 159 } 160 161 /* 162 * Do output DMA to determine interface presence and 163 * interrupt vector. DMA is too short to disturb other hosts. 164 */ 165 ecprobe(reg, ui) 166 caddr_t reg; 167 struct uba_device *ui; 168 { 169 register int br, cvec; /* r11, r10 value-result */ 170 register struct ecdevice *addr = (struct ecdevice *)reg; 171 register caddr_t ecbuf = (caddr_t) &umem[ui->ui_ubanum][ui->ui_flags]; 172 173 #ifdef lint 174 br = 0; cvec = br; br = cvec; 175 ecrint(0); ecxint(0); eccollide(0); 176 #endif 177 178 /* 179 * Check that buffer memory was found and enabled. 180 */ 181 if (ui->ui_type == 0) 182 return(0); 183 /* 184 * Make a one byte packet in what should be buffer #0. 185 * Submit it for sending. This should cause an xmit interrupt. 186 * The xmit interrupt vector is 8 bytes after the receive vector, 187 * so adjust for this before returning. 188 */ 189 *(u_short *)ecbuf = (u_short) 03777; 190 ecbuf[03777] = '\0'; 191 addr->ec_xcr = EC_XINTEN|EC_XWBN; 192 DELAY(100000); 193 addr->ec_xcr = EC_XCLR; 194 if (cvec > 0 && cvec != 0x200) { 195 if (cvec & 04) { /* collision interrupt */ 196 cvec -= 04; 197 br += 1; /* rcv is collision + 1 */ 198 } else { /* xmit interrupt */ 199 cvec -= 010; 200 br += 2; /* rcv is xmit + 2 */ 201 } 202 } 203 return (1); 204 } 205 206 /* 207 * Interface exists: make available by filling in network interface 208 * record. System will initialize the interface when it is ready 209 * to accept packets. 210 */ 211 ecattach(ui) 212 struct uba_device *ui; 213 { 214 struct ec_softc *es = &ec_softc[ui->ui_unit]; 215 register struct ifnet *ifp = &es->es_if; 216 register struct ecdevice *addr = (struct ecdevice *)ui->ui_addr; 217 int i, j; 218 u_char *cp; 219 220 ifp->if_unit = ui->ui_unit; 221 ifp->if_name = "ec"; 222 ifp->if_mtu = ETHERMTU; 223 224 /* 225 * Read the ethernet address off the board, one nibble at a time. 226 */ 227 addr->ec_xcr = EC_UECLR; /* zero address pointer */ 228 addr->ec_rcr = EC_AROM; 229 cp = es->es_addr; 230 #define NEXTBIT addr->ec_rcr = EC_AROM|EC_ASTEP; addr->ec_rcr = EC_AROM 231 for (i=0; i < sizeof (es->es_addr); i++) { 232 *cp = 0; 233 for (j=0; j<=4; j+=4) { 234 *cp |= ((addr->ec_rcr >> 8) & 0xf) << j; 235 NEXTBIT; NEXTBIT; NEXTBIT; NEXTBIT; 236 } 237 cp++; 238 } 239 #ifdef DEBUG 240 printf("ecattach %d: addr=",ui->ui_unit); 241 ether_addr(es->es_addr); 242 #endif 243 ifp->if_init = ecinit; 244 ifp->if_ioctl = ecioctl; 245 ifp->if_output = ecoutput; 246 ifp->if_reset = ecreset; 247 ifp->if_flags = IFF_BROADCAST; 248 for (i=0; i<16; i++) 249 es->es_buf[i] 250 = (u_char *)&umem[ui->ui_ubanum][ui->ui_flags + 2048*i]; 251 if_attach(ifp); 252 } 253 254 /* 255 * Reset of interface after UNIBUS reset. 256 * If interface is on specified uba, reset its state. 257 */ 258 ecreset(unit, uban) 259 int unit, uban; 260 { 261 register struct uba_device *ui; 262 263 if (unit >= NEC || (ui = ecinfo[unit]) == 0 || ui->ui_alive == 0 || 264 ui->ui_ubanum != uban) 265 return; 266 printf(" ec%d", unit); 267 ec_softc[unit].es_if.if_flags &= ~IFF_RUNNING; 268 ecinit(unit); 269 } 270 271 /* 272 * Initialization of interface; clear recorded pending 273 * operations, and reinitialize UNIBUS usage. 274 */ 275 ecinit(unit) 276 int unit; 277 { 278 struct ec_softc *es = &ec_softc[unit]; 279 struct ecdevice *addr; 280 register struct ifnet *ifp = &es->es_if; 281 int i, s; 282 283 /* not yet, if address still unknown */ 284 if (ifp->if_addrlist == (struct ifaddr *)0) 285 return; 286 287 /* 288 * Hang receive buffers and start any pending writes. 289 * Writing into the rcr also makes sure the memory 290 * is turned on. 291 */ 292 if ((ifp->if_flags & IFF_RUNNING) == 0) { 293 addr = (struct ecdevice *)ecinfo[unit]->ui_addr; 294 s = splimp(); 295 /* 296 * write our ethernet address into the address recognition ROM 297 * so we can always use the same EC_READ bits (referencing ROM), 298 * in case we change the address sometime. 299 * Note that this is safe here as the reciever is NOT armed. 300 */ 301 ec_setaddr(es->es_addr, unit); 302 /* 303 * Arm the reciever 304 */ 305 for (i = ECRHBF; i >= ECRLBF; i--) 306 addr->ec_rcr = EC_READ | i; 307 es->es_oactive = 0; 308 es->es_mask = ~0; 309 es->es_if.if_flags |= IFF_RUNNING; 310 if (es->es_if.if_snd.ifq_head) 311 ecstart(unit); 312 splx(s); 313 } 314 } 315 316 /* 317 * Start or restart output on interface. 318 * If interface is already active, then this is a retransmit 319 * after a collision, and just restuff registers. 320 * If interface is not already active, get another datagram 321 * to send off of the interface queue, and map it to the interface 322 * before starting the output. 323 */ 324 ecstart(unit) 325 { 326 struct ec_softc *es = &ec_softc[unit]; 327 struct ecdevice *addr; 328 struct mbuf *m; 329 330 if (es->es_oactive) 331 goto restart; 332 333 IF_DEQUEUE(&es->es_if.if_snd, m); 334 if (m == 0) { 335 es->es_oactive = 0; 336 return; 337 } 338 ecput(es->es_buf[ECTBF], m); 339 340 restart: 341 addr = (struct ecdevice *)ecinfo[unit]->ui_addr; 342 addr->ec_xcr = EC_WRITE|ECTBF; 343 es->es_oactive = 1; 344 } 345 346 /* 347 * Ethernet interface transmitter interrupt. 348 * Start another output if more data to send. 349 */ 350 ecxint(unit) 351 int unit; 352 { 353 register struct ec_softc *es = &ec_softc[unit]; 354 register struct ecdevice *addr = 355 (struct ecdevice *)ecinfo[unit]->ui_addr; 356 357 if (es->es_oactive == 0) 358 return; 359 if ((addr->ec_xcr&EC_XDONE) == 0 || (addr->ec_xcr&EC_XBN) != ECTBF) { 360 printf("ec%d: stray xmit interrupt, xcr=%b\n", unit, 361 addr->ec_xcr, EC_XBITS); 362 es->es_oactive = 0; 363 addr->ec_xcr = EC_XCLR; 364 return; 365 } 366 es->es_if.if_opackets++; 367 es->es_oactive = 0; 368 es->es_mask = ~0; 369 addr->ec_xcr = EC_XCLR; 370 if (es->es_if.if_snd.ifq_head) 371 ecstart(unit); 372 } 373 374 /* 375 * Collision on ethernet interface. Do exponential 376 * backoff, and retransmit. If have backed off all 377 * the way print warning diagnostic, and drop packet. 378 */ 379 eccollide(unit) 380 int unit; 381 { 382 struct ec_softc *es = &ec_softc[unit]; 383 384 es->es_if.if_collisions++; 385 if (es->es_oactive) 386 ecdocoll(unit); 387 } 388 389 ecdocoll(unit) 390 int unit; 391 { 392 register struct ec_softc *es = &ec_softc[unit]; 393 register struct ecdevice *addr = 394 (struct ecdevice *)ecinfo[unit]->ui_addr; 395 register i; 396 int delay; 397 398 /* 399 * Es_mask is a 16 bit number with n low zero bits, with 400 * n the number of backoffs. When es_mask is 0 we have 401 * backed off 16 times, and give up. 402 */ 403 if (es->es_mask == 0) { 404 es->es_if.if_oerrors++; 405 printf("ec%d: send error\n", unit); 406 /* 407 * Reset interface, then requeue rcv buffers. 408 * Some incoming packets may be lost, but that 409 * can't be helped. 410 */ 411 addr->ec_xcr = EC_UECLR; 412 for (i=ECRHBF; i>=ECRLBF; i--) 413 addr->ec_rcr = EC_READ|i; 414 /* 415 * Reset and transmit next packet (if any). 416 */ 417 es->es_oactive = 0; 418 es->es_mask = ~0; 419 if (es->es_if.if_snd.ifq_head) 420 ecstart(unit); 421 return; 422 } 423 /* 424 * Do exponential backoff. Compute delay based on low bits 425 * of the interval timer. Then delay for that number of 426 * slot times. A slot time is 51.2 microseconds (rounded to 51). 427 * This does not take into account the time already used to 428 * process the interrupt. 429 */ 430 es->es_mask <<= 1; 431 delay = mfpr(ICR) &~ es->es_mask; 432 DELAY(delay * 51); 433 /* 434 * Clear the controller's collision flag, thus enabling retransmit. 435 */ 436 addr->ec_xcr = EC_CLEAR; 437 } 438 439 /* 440 * Ethernet interface receiver interrupt. 441 * If input error just drop packet. 442 * Otherwise examine 443 * packet to determine type. If can't determine length 444 * from type, then have to drop packet. Othewise decapsulate 445 * packet based on type and pass to type specific higher-level 446 * input routine. 447 */ 448 ecrint(unit) 449 int unit; 450 { 451 struct ecdevice *addr = (struct ecdevice *)ecinfo[unit]->ui_addr; 452 453 while (addr->ec_rcr & EC_RDONE) 454 ecread(unit); 455 } 456 457 ecread(unit) 458 int unit; 459 { 460 register struct ec_softc *es = &ec_softc[unit]; 461 struct ecdevice *addr = (struct ecdevice *)ecinfo[unit]->ui_addr; 462 register struct ether_header *ec; 463 struct mbuf *m; 464 int len, off, resid, ecoff, rbuf; 465 register struct ifqueue *inq; 466 u_char *ecbuf; 467 468 es->es_if.if_ipackets++; 469 rbuf = addr->ec_rcr & EC_RBN; 470 if (rbuf < ECRLBF || rbuf > ECRHBF) 471 panic("ecrint"); 472 ecbuf = es->es_buf[rbuf]; 473 ecoff = *(short *)ecbuf; 474 if (ecoff <= ECRDOFF || ecoff > 2046) { 475 es->es_if.if_ierrors++; 476 #ifdef notdef 477 if (es->es_if.if_ierrors % 100 == 0) 478 printf("ec%d: += 100 input errors\n", unit); 479 #endif 480 goto setup; 481 } 482 483 /* 484 * Get input data length. 485 * Get pointer to ethernet header (in input buffer). 486 * Deal with trailer protocol: if type is trailer type 487 * get true type from first 16-bit word past data. 488 * Remember that type was trailer by setting off. 489 */ 490 len = ecoff - ECRDOFF - sizeof (struct ether_header); 491 ec = (struct ether_header *)(ecbuf + ECRDOFF); 492 ec->ether_type = ntohs((u_short)ec->ether_type); 493 #define ecdataaddr(ec, off, type) ((type)(((caddr_t)((ec)+1)+(off)))) 494 if (ec->ether_type >= ETHERTYPE_TRAIL && 495 ec->ether_type < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) { 496 off = (ec->ether_type - ETHERTYPE_TRAIL) * 512; 497 if (off >= ETHERMTU) 498 goto setup; /* sanity */ 499 ec->ether_type = ntohs(*ecdataaddr(ec, off, u_short *)); 500 resid = ntohs(*(ecdataaddr(ec, off+2, u_short *))); 501 if (off + resid > len) 502 goto setup; /* sanity */ 503 len = off + resid; 504 } else 505 off = 0; 506 if (len == 0) 507 goto setup; 508 509 /* 510 * Pull packet off interface. Off is nonzero if packet 511 * has trailing header; ecget will then force this header 512 * information to be at the front, but we still have to drop 513 * the type and length which are at the front of any trailer data. 514 */ 515 m = ecget(ecbuf, len, off); 516 if (m == 0) 517 goto setup; 518 if (off) { 519 m->m_off += 2 * sizeof (u_short); 520 m->m_len -= 2 * sizeof (u_short); 521 } 522 switch (ec->ether_type) { 523 524 #ifdef INET 525 case ETHERTYPE_IP: 526 schednetisr(NETISR_IP); 527 inq = &ipintrq; 528 break; 529 530 case ETHERTYPE_ARP: 531 arpinput(&es->es_ac, m); 532 goto setup; 533 #endif 534 #ifdef NS 535 case ETHERTYPE_NS: 536 schednetisr(NETISR_NS); 537 inq = &nsintrq; 538 break; 539 540 #endif 541 default: 542 m_freem(m); 543 goto setup; 544 } 545 546 if (IF_QFULL(inq)) { 547 IF_DROP(inq); 548 m_freem(m); 549 goto setup; 550 } 551 IF_ENQUEUE(inq, m); 552 553 setup: 554 /* 555 * Reset for next packet. 556 */ 557 addr->ec_rcr = EC_READ|EC_RCLR|rbuf; 558 } 559 560 /* 561 * Ethernet output routine. 562 * Encapsulate a packet of type family for the local net. 563 * Use trailer local net encapsulation if enough data in first 564 * packet leaves a multiple of 512 bytes of data in remainder. 565 * If destination is this address or broadcast, send packet to 566 * loop device to kludge around the fact that 3com interfaces can't 567 * talk to themselves. 568 */ 569 ecoutput(ifp, m0, dst) 570 struct ifnet *ifp; 571 struct mbuf *m0; 572 struct sockaddr *dst; 573 { 574 int type, s, error; 575 u_char edst[6]; 576 struct in_addr idst; 577 register struct ec_softc *es = &ec_softc[ifp->if_unit]; 578 register struct mbuf *m = m0; 579 register struct ether_header *ec; 580 register int off; 581 struct mbuf *mcopy = (struct mbuf *)0; 582 583 switch (dst->sa_family) { 584 585 #ifdef INET 586 case AF_INET: 587 idst = ((struct sockaddr_in *)dst)->sin_addr; 588 if (!arpresolve(&es->es_ac, m, &idst, edst)) 589 return (0); /* if not yet resolved */ 590 if (!bcmp((caddr_t)edst, (caddr_t)etherbroadcastaddr, 591 sizeof(edst))) 592 mcopy = m_copy(m, 0, (int)M_COPYALL); 593 off = ntohs((u_short)mtod(m, struct ip *)->ip_len) - m->m_len; 594 /* need per host negotiation */ 595 if ((ifp->if_flags & IFF_NOTRAILERS) == 0) 596 if (off > 0 && (off & 0x1ff) == 0 && 597 m->m_off >= MMINOFF + 2 * sizeof (u_short)) { 598 type = ETHERTYPE_TRAIL + (off>>9); 599 m->m_off -= 2 * sizeof (u_short); 600 m->m_len += 2 * sizeof (u_short); 601 *mtod(m, u_short *) = ntohs((u_short)ETHERTYPE_IP); 602 *(mtod(m, u_short *) + 1) = ntohs((u_short)m->m_len); 603 goto gottrailertype; 604 } 605 type = ETHERTYPE_IP; 606 off = 0; 607 goto gottype; 608 #endif 609 #ifdef NS 610 case AF_NS: 611 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host), 612 (caddr_t)edst, sizeof (edst)); 613 614 if (!bcmp((caddr_t)edst, (caddr_t)&ns_broadhost, 615 sizeof(edst))) { 616 617 mcopy = m_copy(m, 0, (int)M_COPYALL); 618 } else if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, 619 sizeof(edst))) { 620 621 return(looutput(&loif, m, dst)); 622 } 623 type = ETHERTYPE_NS; 624 off = 0; 625 goto gottype; 626 #endif 627 628 case AF_UNSPEC: 629 ec = (struct ether_header *)dst->sa_data; 630 bcopy((caddr_t)ec->ether_dhost, (caddr_t)edst, sizeof (edst)); 631 type = ec->ether_type; 632 goto gottype; 633 634 default: 635 printf("ec%d: can't handle af%d\n", ifp->if_unit, 636 dst->sa_family); 637 error = EAFNOSUPPORT; 638 goto bad; 639 } 640 641 gottrailertype: 642 /* 643 * Packet to be sent as trailer: move first packet 644 * (control information) to end of chain. 645 */ 646 while (m->m_next) 647 m = m->m_next; 648 m->m_next = m0; 649 m = m0->m_next; 650 m0->m_next = 0; 651 m0 = m; 652 653 gottype: 654 /* 655 * Add local net header. If no space in first mbuf, 656 * allocate another. 657 */ 658 if (m->m_off > MMAXOFF || 659 MMINOFF + sizeof (struct ether_header) > m->m_off) { 660 m = m_get(M_DONTWAIT, MT_HEADER); 661 if (m == 0) { 662 error = ENOBUFS; 663 goto bad; 664 } 665 m->m_next = m0; 666 m->m_off = MMINOFF; 667 m->m_len = sizeof (struct ether_header); 668 } else { 669 m->m_off -= sizeof (struct ether_header); 670 m->m_len += sizeof (struct ether_header); 671 } 672 ec = mtod(m, struct ether_header *); 673 bcopy((caddr_t)edst, (caddr_t)ec->ether_dhost, sizeof (edst)); 674 bcopy((caddr_t)es->es_addr, (caddr_t)ec->ether_shost, 675 sizeof(ec->ether_shost)); 676 ec->ether_type = htons((u_short)type); 677 678 /* 679 * Queue message on interface, and start output if interface 680 * not yet active. 681 */ 682 s = splimp(); 683 if (IF_QFULL(&ifp->if_snd)) { 684 IF_DROP(&ifp->if_snd); 685 error = ENOBUFS; 686 goto qfull; 687 } 688 IF_ENQUEUE(&ifp->if_snd, m); 689 if (es->es_oactive == 0) 690 ecstart(ifp->if_unit); 691 splx(s); 692 return (mcopy ? looutput(&loif, mcopy, dst) : 0); 693 694 qfull: 695 m0 = m; 696 splx(s); 697 bad: 698 m_freem(m0); 699 if (mcopy) 700 m_freem(mcopy); 701 return (error); 702 } 703 704 /* 705 * Routine to copy from mbuf chain to transmit 706 * buffer in UNIBUS memory. 707 * If packet size is less than the minimum legal size, 708 * the buffer is expanded. We probably should zero out the extra 709 * bytes for security, but that would slow things down. 710 */ 711 ecput(ecbuf, m) 712 u_char *ecbuf; 713 struct mbuf *m; 714 { 715 register struct mbuf *mp; 716 register int off; 717 u_char *bp; 718 719 for (off = 2048, mp = m; mp; mp = mp->m_next) 720 off -= mp->m_len; 721 if (2048 - off < ETHERMIN + sizeof (struct ether_header)) 722 off = 2048 - ETHERMIN - sizeof (struct ether_header); 723 *(u_short *)ecbuf = off; 724 bp = (u_char *)(ecbuf + off); 725 for (mp = m; mp; mp = mp->m_next) { 726 register unsigned len = mp->m_len; 727 u_char *mcp; 728 729 if (len == 0) 730 continue; 731 mcp = mtod(mp, u_char *); 732 if ((unsigned)bp & 01) { 733 *bp++ = *mcp++; 734 len--; 735 } 736 if (off = (len >> 1)) { 737 register u_short *to, *from; 738 739 to = (u_short *)bp; 740 from = (u_short *)mcp; 741 do 742 *to++ = *from++; 743 while (--off > 0); 744 bp = (u_char *)to, 745 mcp = (u_char *)from; 746 } 747 if (len & 01) 748 *bp++ = *mcp++; 749 } 750 m_freem(m); 751 } 752 753 /* 754 * Routine to copy from UNIBUS memory into mbufs. 755 * Similar in spirit to if_rubaget. 756 * 757 * Warning: This makes the fairly safe assumption that 758 * mbufs have even lengths. 759 */ 760 struct mbuf * 761 ecget(ecbuf, totlen, off0) 762 u_char *ecbuf; 763 int totlen, off0; 764 { 765 register struct mbuf *m; 766 struct mbuf *top = 0, **mp = ⊤ 767 register int off = off0, len; 768 u_char *cp; 769 770 cp = ecbuf + ECRDOFF + sizeof (struct ether_header); 771 while (totlen > 0) { 772 register int words; 773 u_char *mcp; 774 775 MGET(m, M_DONTWAIT, MT_DATA); 776 if (m == 0) 777 goto bad; 778 if (off) { 779 len = totlen - off; 780 cp = ecbuf + ECRDOFF + 781 sizeof (struct ether_header) + off; 782 } else 783 len = totlen; 784 if (len >= CLBYTES) { 785 struct mbuf *p; 786 787 MCLGET(p, 1); 788 if (p != 0) { 789 m->m_len = len = CLBYTES; 790 m->m_off = (int)p - (int)m; 791 } else { 792 m->m_len = len = MIN(MLEN, len); 793 m->m_off = MMINOFF; 794 } 795 } else { 796 m->m_len = len = MIN(MLEN, len); 797 m->m_off = MMINOFF; 798 } 799 mcp = mtod(m, u_char *); 800 if (words = (len >> 1)) { 801 register u_short *to, *from; 802 803 to = (u_short *)mcp; 804 from = (u_short *)cp; 805 do 806 *to++ = *from++; 807 while (--words > 0); 808 mcp = (u_char *)to; 809 cp = (u_char *)from; 810 } 811 if (len & 01) 812 *mcp++ = *cp++; 813 *mp = m; 814 mp = &m->m_next; 815 if (off == 0) { 816 totlen -= len; 817 continue; 818 } 819 off += len; 820 if (off == totlen) { 821 cp = ecbuf + ECRDOFF + sizeof (struct ether_header); 822 off = 0; 823 totlen = off0; 824 } 825 } 826 return (top); 827 bad: 828 m_freem(top); 829 return (0); 830 } 831 832 /* 833 * Process an ioctl request. 834 */ 835 ecioctl(ifp, cmd, data) 836 register struct ifnet *ifp; 837 int cmd; 838 caddr_t data; 839 { 840 register struct ifaddr *ifa = (struct ifaddr *)data; 841 int s = splimp(), error = 0; 842 843 switch (cmd) { 844 845 case SIOCSIFADDR: 846 ifp->if_flags |= IFF_UP; 847 848 switch (ifa->ifa_addr.sa_family) { 849 #ifdef INET 850 case AF_INET: 851 ecinit(ifp->if_unit); /* before, so we can send the ARP packet */ 852 ((struct arpcom *)ifp)->ac_ipaddr = 853 IA_SIN(ifa)->sin_addr; 854 arpwhohas((struct arpcom *)ifp, &IA_SIN(ifa)->sin_addr); 855 break; 856 #endif 857 #ifdef NS 858 case AF_NS: 859 { 860 register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr); 861 862 if (ns_nullhost(*ina)) { 863 ina->x_host = * (union ns_host *) 864 (ec_softc[ifp->if_unit].es_addr); 865 } else { 866 /* 867 * The manual says we can't change the address 868 * while the reciever is armed so reset everything 869 */ 870 struct ec_softc *es = &ec_softc[ifp->if_unit]; 871 struct uba_device *ui = ecinfo[ifp->if_unit]; 872 struct ecdevice *addr = (struct ecdevice *)ui->ui_addr; 873 874 es->es_if.if_flags &= ~IFF_RUNNING; 875 bcopy(ina->x_host.c_host, es->es_addr, sizeof(es->es_addr)); 876 } 877 ecinit(ifp->if_unit); /* does ec_setaddr() */ 878 break; 879 } 880 #endif 881 } 882 break; 883 884 default: 885 error = EINVAL; 886 } 887 splx(s); 888 return (error); 889 } 890 891 ec_setaddr(physaddr,unit) 892 u_char *physaddr; 893 int unit; 894 { 895 struct ec_softc *es = &ec_softc[unit]; 896 struct uba_device *ui = ecinfo[unit]; 897 register struct ecdevice *addr = (struct ecdevice *)ui->ui_addr; 898 register char nibble; 899 register int i, j; 900 char *cp; 901 /* 902 * Use the ethernet address supplied 903 * NOte that we do a UECLR here, so the recieve buffers 904 * must be requeued. 905 */ 906 907 #ifdef DEBUG 908 printf("ec_setaddr: setting address for unit %d = ", 909 unit); 910 ether_addr(physaddr); 911 #endif 912 addr->ec_xcr = EC_UECLR; 913 addr->ec_rcr = 0; 914 /* load requested address */ 915 for (i = 0; i < 6; i++) { /* 6 bytes of address */ 916 es->es_addr[i] = physaddr[i]; 917 nibble = physaddr[i] & 0xf; /* lower nibble */ 918 addr->ec_rcr = (nibble << 8); 919 addr->ec_rcr = (nibble << 8) + EC_AWCLK; /* latch nibble */ 920 addr->ec_rcr = (nibble << 8); 921 for (j=0; j < 4; j++) { 922 addr->ec_rcr = 0; 923 addr->ec_rcr = EC_ASTEP; /* step counter */ 924 addr->ec_rcr = 0; 925 } 926 nibble = (physaddr[i] >> 4) & 0xf; /* upper nibble */ 927 addr->ec_rcr = (nibble << 8); 928 addr->ec_rcr = (nibble << 8) + EC_AWCLK; /* latch nibble */ 929 addr->ec_rcr = (nibble << 8); 930 for (j=0; j < 4; j++) { 931 addr->ec_rcr = 0; 932 addr->ec_rcr = EC_ASTEP; /* step counter */ 933 addr->ec_rcr = 0; 934 } 935 } 936 #ifdef DEBUG 937 /* 938 * Read the ethernet address off the board, one nibble at a time. 939 */ 940 addr->ec_xcr = EC_UECLR; 941 addr->ec_rcr = 0; /* read RAM */ 942 cp = es->es_addr; 943 #undef NEXTBIT 944 #define NEXTBIT addr->ec_rcr = EC_ASTEP; addr->ec_rcr = 0 945 for (i=0; i < sizeof (es->es_addr); i++) { 946 *cp = 0; 947 for (j=0; j<=4; j+=4) { 948 *cp |= ((addr->ec_rcr >> 8) & 0xf) << j; 949 NEXTBIT; NEXTBIT; NEXTBIT; NEXTBIT; 950 } 951 cp++; 952 } 953 printf("ec_setaddr %d: ROM addr=",ui->ui_unit); 954 ether_addr(es->es_addr); 955 #endif 956 } 957