1 /* if_il.c 4.20 83/05/27 */ 2 3 #include "il.h" 4 5 /* 6 * Interlan Ethernet Communications Controller interface 7 */ 8 #include "../machine/pte.h" 9 10 #include "../h/param.h" 11 #include "../h/systm.h" 12 #include "../h/mbuf.h" 13 #include "../h/buf.h" 14 #include "../h/protosw.h" 15 #include "../h/socket.h" 16 #include "../h/vmmac.h" 17 #include <errno.h> 18 19 #include "../net/if.h" 20 #include "../net/netisr.h" 21 #include "../net/route.h" 22 #include "../netinet/in.h" 23 #include "../netinet/in_systm.h" 24 #include "../netinet/ip.h" 25 #include "../netinet/ip_var.h" 26 #include "../netinet/if_ether.h" 27 #include "../netpup/pup.h" 28 29 #include "../vax/cpu.h" 30 #include "../vax/mtpr.h" 31 #include "../vaxif/if_il.h" 32 #include "../vaxif/if_ilreg.h" 33 #include "../vaxif/if_uba.h" 34 #include "../vaxuba/ubareg.h" 35 #include "../vaxuba/ubavar.h" 36 37 int ilprobe(), ilattach(), ilrint(), ilcint(); 38 struct uba_device *ilinfo[NIL]; 39 u_short ilstd[] = { 0 }; 40 struct uba_driver ildriver = 41 { ilprobe, 0, ilattach, 0, ilstd, "il", ilinfo }; 42 #define ILUNIT(x) minor(x) 43 int ilinit(),iloutput(),ilreset(),ilwatch(); 44 45 /* 46 * Ethernet software status per interface. 47 * 48 * Each interface is referenced by a network interface structure, 49 * is_if, which the routing code uses to locate the interface. 50 * This structure contains the output queue for the interface, its address, ... 51 * We also have, for each interface, a UBA interface structure, which 52 * contains information about the UNIBUS resources held by the interface: 53 * map registers, buffered data paths, etc. Information is cached in this 54 * structure for use by the if_uba.c routines in running the interface 55 * efficiently. 56 */ 57 struct il_softc { 58 struct arpcom is_ac; /* Ethernet common part */ 59 #define is_if is_ac.ac_if /* network-visible interface */ 60 #define is_addr is_ac.ac_enaddr /* hardware Ethernet address */ 61 struct ifuba is_ifuba; /* UNIBUS resources */ 62 int is_flags; 63 #define ILF_OACTIVE 0x1 /* output is active */ 64 #define ILF_RCVPENDING 0x2 /* start rcv in ilcint */ 65 #define ILF_STATPENDING 0x4 /* stat cmd pending */ 66 short is_lastcmd; /* can't read csr, so must save it */ 67 short is_scaninterval; /* interval of stat collection */ 68 #define ILWATCHINTERVAL 60 /* once every 60 seconds */ 69 struct il_stats is_stats; /* holds on-board statistics */ 70 struct il_stats is_sum; /* summation over time */ 71 int is_ubaddr; /* mapping registers of is_stats */ 72 } il_softc[NIL]; 73 74 ilprobe(reg) 75 caddr_t reg; 76 { 77 register int br, cvec; /* r11, r10 value-result */ 78 register struct ildevice *addr = (struct ildevice *)reg; 79 register i; 80 81 #ifdef lint 82 br = 0; cvec = br; br = cvec; 83 i = 0; ilrint(i); ilcint(i); ilwatch(i); 84 #endif 85 86 addr->il_csr = ILC_OFFLINE|IL_CIE; 87 DELAY(100000); 88 i = addr->il_csr; /* clear CDONE */ 89 if (cvec > 0 && cvec != 0x200) 90 cvec -= 4; 91 return (1); 92 } 93 94 /* 95 * Interface exists: make available by filling in network interface 96 * record. System will initialize the interface when it is ready 97 * to accept packets. A STATUS command is done to get the ethernet 98 * address and other interesting data. 99 */ 100 ilattach(ui) 101 struct uba_device *ui; 102 { 103 register struct il_softc *is = &il_softc[ui->ui_unit]; 104 register struct ifnet *ifp = &is->is_if; 105 register struct ildevice *addr = (struct ildevice *)ui->ui_addr; 106 struct sockaddr_in *sin; 107 108 ifp->if_unit = ui->ui_unit; 109 ifp->if_name = "il"; 110 ifp->if_mtu = ETHERMTU; 111 112 /* 113 * Reset the board and map the statistics 114 * buffer onto the Unibus. 115 */ 116 addr->il_csr = ILC_RESET; 117 while ((addr->il_csr&IL_CDONE) == 0) 118 ; 119 if (addr->il_csr&IL_STATUS) 120 printf("il%d: reset failed, csr=%b\n", ui->ui_unit, 121 addr->il_csr, IL_BITS); 122 123 is->is_ubaddr = uballoc(ui->ui_ubanum, (caddr_t)&is->is_stats, 124 sizeof (struct il_stats), 0); 125 addr->il_bar = is->is_ubaddr & 0xffff; 126 addr->il_bcr = sizeof (struct il_stats); 127 addr->il_csr = ((is->is_ubaddr >> 2) & IL_EUA)|ILC_STAT; 128 while ((addr->il_csr&IL_CDONE) == 0) 129 ; 130 if (addr->il_csr&IL_STATUS) 131 printf("il%d: status failed, csr=%b\n", ui->ui_unit, 132 addr->il_csr, IL_BITS); 133 ubarelse(ui->ui_ubanum, &is->is_ubaddr); 134 #ifdef notdef 135 printf("il%d: addr=%x:%x:%x:%x:%x:%x module=%s firmware=%s\n", 136 ui->ui_unit, 137 is->is_stats.ils_addr[0]&0xff, is->is_stats.ils_addr[1]&0xff, 138 is->is_stats.ils_addr[2]&0xff, is->is_stats.ils_addr[3]&0xff, 139 is->is_stats.ils_addr[4]&0xff, is->is_stats.ils_addr[5]&0xff, 140 is->is_stats.ils_module, is->is_stats.ils_firmware); 141 #endif 142 bcopy((caddr_t)is->is_stats.ils_addr, (caddr_t)is->is_addr, 143 sizeof (is->is_addr)); 144 sin = (struct sockaddr_in *)&ifp->if_addr; 145 sin->sin_family = AF_INET; 146 sin->sin_addr = arpmyaddr((struct arpcom *)0); 147 ifp->if_init = ilinit; 148 ifp->if_output = iloutput; 149 ifp->if_reset = ilreset; 150 ifp->if_watchdog = ilwatch; 151 is->is_scaninterval = ILWATCHINTERVAL; 152 ifp->if_timer = is->is_scaninterval; 153 is->is_ifuba.ifu_flags = UBA_CANTWAIT; 154 #ifdef notdef 155 is->is_ifuba.ifu_flags |= UBA_NEEDBDP; 156 #endif 157 if_attach(ifp); 158 } 159 160 /* 161 * Reset of interface after UNIBUS reset. 162 * If interface is on specified uba, reset its state. 163 */ 164 ilreset(unit, uban) 165 int unit, uban; 166 { 167 register struct uba_device *ui; 168 169 if (unit >= NIL || (ui = ilinfo[unit]) == 0 || ui->ui_alive == 0 || 170 ui->ui_ubanum != uban) 171 return; 172 printf(" il%d", unit); 173 ilinit(unit); 174 } 175 176 /* 177 * Initialization of interface; clear recorded pending 178 * operations, and reinitialize UNIBUS usage. 179 */ 180 ilinit(unit) 181 int unit; 182 { 183 register struct il_softc *is = &il_softc[unit]; 184 register struct uba_device *ui = ilinfo[unit]; 185 register struct ildevice *addr; 186 int s; 187 register struct ifnet *ifp = &is->is_if; 188 register struct sockaddr_in *sin, *sinb; 189 190 sin = (struct sockaddr_in *)&ifp->if_addr; 191 if (sin->sin_addr.s_addr == 0) /* if address still unknown */ 192 return; 193 ifp->if_net = in_netof(sin->sin_addr); 194 ifp->if_host[0] = in_lnaof(sin->sin_addr); 195 sinb = (struct sockaddr_in *)&ifp->if_broadaddr; 196 sinb->sin_family = AF_INET; 197 sinb->sin_addr = if_makeaddr(ifp->if_net, INADDR_ANY); 198 ifp->if_flags = IFF_BROADCAST; 199 200 if (if_ubainit(&is->is_ifuba, ui->ui_ubanum, 201 sizeof (struct il_rheader), (int)btoc(ETHERMTU)) == 0) { 202 printf("il%d: can't initialize\n", unit); 203 is->is_if.if_flags &= ~IFF_UP; 204 return; 205 } 206 is->is_ubaddr = uballoc(ui->ui_ubanum, (caddr_t)&is->is_stats, 207 sizeof (struct il_stats), 0); 208 addr = (struct ildevice *)ui->ui_addr; 209 210 /* 211 * Turn off source address insertion (it's faster this way), 212 * and set board online. Former doesn't work if board is 213 * already online (happens on ubareset), so we put it offline 214 * first. 215 */ 216 s = splimp(); 217 addr->il_csr = ILC_OFFLINE; 218 while ((addr->il_csr & IL_CDONE) == 0) 219 ; 220 addr->il_csr = ILC_CISA; 221 while ((addr->il_csr & IL_CDONE) == 0) 222 ; 223 /* 224 * Set board online. 225 * Hang receive buffer and start any pending 226 * writes by faking a transmit complete. 227 * Receive bcr is not a muliple of 4 so buffer 228 * chaining can't happen. 229 */ 230 addr->il_csr = ILC_ONLINE; 231 while ((addr->il_csr & IL_CDONE) == 0) 232 ; 233 addr->il_bar = is->is_ifuba.ifu_r.ifrw_info & 0xffff; 234 addr->il_bcr = sizeof(struct il_rheader) + ETHERMTU + 6; 235 addr->il_csr = 236 ((is->is_ifuba.ifu_r.ifrw_info >> 2) & IL_EUA)|ILC_RCV|IL_RIE; 237 while ((addr->il_csr & IL_CDONE) == 0) 238 ; 239 is->is_flags = ILF_OACTIVE; 240 is->is_if.if_flags |= IFF_UP; 241 is->is_lastcmd = 0; 242 ilcint(unit); 243 splx(s); 244 if_rtinit(&is->is_if, RTF_UP); 245 arpattach(&is->is_ac); 246 arpwhohas(&is->is_ac, &sin->sin_addr); 247 } 248 249 /* 250 * Start output on interface. 251 * Get another datagram to send off of the interface queue, 252 * and map it to the interface before starting the output. 253 */ 254 ilstart(dev) 255 dev_t dev; 256 { 257 int unit = ILUNIT(dev), len; 258 struct uba_device *ui = ilinfo[unit]; 259 register struct il_softc *is = &il_softc[unit]; 260 register struct ildevice *addr; 261 struct mbuf *m; 262 short csr; 263 264 IF_DEQUEUE(&is->is_if.if_snd, m); 265 addr = (struct ildevice *)ui->ui_addr; 266 if (m == 0) { 267 if ((is->is_flags & ILF_STATPENDING) == 0) 268 return; 269 addr->il_bar = is->is_ubaddr & 0xffff; 270 addr->il_bcr = sizeof (struct il_stats); 271 csr = ((is->is_ubaddr >> 2) & IL_EUA)|ILC_STAT|IL_RIE|IL_CIE; 272 is->is_flags &= ~ILF_STATPENDING; 273 goto startcmd; 274 } 275 len = if_wubaput(&is->is_ifuba, m); 276 /* 277 * Ensure minimum packet length. 278 * This makes the safe assumtion that there are no virtual holes 279 * after the data. 280 * For security, it might be wise to zero out the added bytes, 281 * but we're mainly interested in speed at the moment. 282 */ 283 if (len - sizeof(struct ether_header) < ETHERMIN) 284 len = ETHERMIN + sizeof(struct ether_header); 285 if (is->is_ifuba.ifu_flags & UBA_NEEDBDP) 286 UBAPURGE(is->is_ifuba.ifu_uba, is->is_ifuba.ifu_w.ifrw_bdp); 287 addr->il_bar = is->is_ifuba.ifu_w.ifrw_info & 0xffff; 288 addr->il_bcr = len; 289 csr = 290 ((is->is_ifuba.ifu_w.ifrw_info >> 2) & IL_EUA)|ILC_XMIT|IL_CIE|IL_RIE; 291 292 startcmd: 293 is->is_lastcmd = csr & IL_CMD; 294 addr->il_csr = csr; 295 is->is_flags |= ILF_OACTIVE; 296 } 297 298 /* 299 * Command done interrupt. 300 */ 301 ilcint(unit) 302 int unit; 303 { 304 register struct il_softc *is = &il_softc[unit]; 305 struct uba_device *ui = ilinfo[unit]; 306 register struct ildevice *addr = (struct ildevice *)ui->ui_addr; 307 short csr; 308 309 if ((is->is_flags & ILF_OACTIVE) == 0) { 310 printf("il%d: stray xmit interrupt, csr=%b\n", unit, 311 addr->il_csr, IL_BITS); 312 return; 313 } 314 315 csr = addr->il_csr; 316 /* 317 * Hang receive buffer if it couldn't 318 * be done earlier (in ilrint). 319 */ 320 if (is->is_flags & ILF_RCVPENDING) { 321 addr->il_bar = is->is_ifuba.ifu_r.ifrw_info & 0xffff; 322 addr->il_bcr = sizeof(struct il_rheader) + ETHERMTU + 6; 323 addr->il_csr = 324 ((is->is_ifuba.ifu_r.ifrw_info >> 2) & IL_EUA)|ILC_RCV|IL_RIE; 325 while ((addr->il_csr & IL_CDONE) == 0) 326 ; 327 is->is_flags &= ~ILF_RCVPENDING; 328 } 329 is->is_flags &= ~ILF_OACTIVE; 330 csr &= IL_STATUS; 331 switch (is->is_lastcmd) { 332 333 case ILC_XMIT: 334 is->is_if.if_opackets++; 335 if (csr > ILERR_RETRIES) 336 is->is_if.if_oerrors++; 337 break; 338 339 case ILC_STAT: 340 if (csr == ILERR_SUCCESS) 341 iltotal(is); 342 break; 343 } 344 if (is->is_ifuba.ifu_xtofree) { 345 m_freem(is->is_ifuba.ifu_xtofree); 346 is->is_ifuba.ifu_xtofree = 0; 347 } 348 ilstart(unit); 349 } 350 351 /* 352 * Ethernet interface receiver interrupt. 353 * If input error just drop packet. 354 * Otherwise purge input buffered data path and examine 355 * packet to determine type. If can't determine length 356 * from type, then have to drop packet. Othewise decapsulate 357 * packet based on type and pass to type specific higher-level 358 * input routine. 359 */ 360 ilrint(unit) 361 int unit; 362 { 363 register struct il_softc *is = &il_softc[unit]; 364 struct ildevice *addr = (struct ildevice *)ilinfo[unit]->ui_addr; 365 register struct il_rheader *il; 366 struct mbuf *m; 367 int len, off, resid; 368 register struct ifqueue *inq; 369 370 is->is_if.if_ipackets++; 371 if (is->is_ifuba.ifu_flags & UBA_NEEDBDP) 372 UBAPURGE(is->is_ifuba.ifu_uba, is->is_ifuba.ifu_r.ifrw_bdp); 373 il = (struct il_rheader *)(is->is_ifuba.ifu_r.ifrw_addr); 374 len = il->ilr_length - sizeof(struct il_rheader); 375 if ((il->ilr_status&(ILFSTAT_A|ILFSTAT_C)) || len < 46 || 376 len > ETHERMTU) { 377 is->is_if.if_ierrors++; 378 #ifdef notdef 379 if (is->is_if.if_ierrors % 100 == 0) 380 printf("il%d: += 100 input errors\n", unit); 381 #endif 382 goto setup; 383 } 384 385 /* 386 * Deal with trailer protocol: if type is PUP trailer 387 * get true type from first 16-bit word past data. 388 * Remember that type was trailer by setting off. 389 */ 390 il->ilr_type = ntohs((u_short)il->ilr_type); 391 #define ildataaddr(il, off, type) ((type)(((caddr_t)((il)+1)+(off)))) 392 if (il->ilr_type >= ETHERPUP_TRAIL && 393 il->ilr_type < ETHERPUP_TRAIL+ETHERPUP_NTRAILER) { 394 off = (il->ilr_type - ETHERPUP_TRAIL) * 512; 395 if (off >= ETHERMTU) 396 goto setup; /* sanity */ 397 il->ilr_type = ntohs(*ildataaddr(il, off, u_short *)); 398 resid = ntohs(*(ildataaddr(il, off+2, u_short *))); 399 if (off + resid > len) 400 goto setup; /* sanity */ 401 len = off + resid; 402 } else 403 off = 0; 404 if (len == 0) 405 goto setup; 406 407 /* 408 * Pull packet off interface. Off is nonzero if packet 409 * has trailing header; ilget will then force this header 410 * information to be at the front, but we still have to drop 411 * the type and length which are at the front of any trailer data. 412 */ 413 m = if_rubaget(&is->is_ifuba, len, off); 414 if (m == 0) 415 goto setup; 416 if (off) { 417 m->m_off += 2 * sizeof (u_short); 418 m->m_len -= 2 * sizeof (u_short); 419 } 420 switch (il->ilr_type) { 421 422 #ifdef INET 423 case ETHERPUP_IPTYPE: 424 schednetisr(NETISR_IP); 425 inq = &ipintrq; 426 break; 427 428 case ETHERPUP_ARPTYPE: 429 arpinput(&is->is_ac, m); 430 return; 431 #endif 432 default: 433 m_freem(m); 434 goto setup; 435 } 436 437 if (IF_QFULL(inq)) { 438 IF_DROP(inq); 439 m_freem(m); 440 goto setup; 441 } 442 IF_ENQUEUE(inq, m); 443 444 setup: 445 /* 446 * Reset for next packet if possible. 447 * If waiting for transmit command completion, set flag 448 * and wait until command completes. 449 */ 450 if (is->is_flags & ILF_OACTIVE) { 451 is->is_flags |= ILF_RCVPENDING; 452 return; 453 } 454 addr->il_bar = is->is_ifuba.ifu_r.ifrw_info & 0xffff; 455 addr->il_bcr = sizeof(struct il_rheader) + ETHERMTU + 6; 456 addr->il_csr = 457 ((is->is_ifuba.ifu_r.ifrw_info >> 2) & IL_EUA)|ILC_RCV|IL_RIE; 458 while ((addr->il_csr & IL_CDONE) == 0) 459 ; 460 } 461 462 /* 463 * Ethernet output routine. 464 * Encapsulate a packet of type family for the local net. 465 * Use trailer local net encapsulation if enough data in first 466 * packet leaves a multiple of 512 bytes of data in remainder. 467 */ 468 iloutput(ifp, m0, dst) 469 struct ifnet *ifp; 470 struct mbuf *m0; 471 struct sockaddr *dst; 472 { 473 int type, s, error; 474 u_char edst[6]; 475 struct in_addr idst; 476 register struct il_softc *is = &il_softc[ifp->if_unit]; 477 register struct mbuf *m = m0; 478 register struct ether_header *il; 479 register int off; 480 481 switch (dst->sa_family) { 482 483 #ifdef INET 484 case AF_INET: 485 idst = ((struct sockaddr_in *)dst)->sin_addr; 486 if (!arpresolve(&is->is_ac, m, &idst, edst)) 487 return (0); /* if not yet resolved */ 488 off = ntohs((u_short)mtod(m, struct ip *)->ip_len) - m->m_len; 489 if (off > 0 && (off & 0x1ff) == 0 && 490 m->m_off >= MMINOFF + 2 * sizeof (u_short)) { 491 type = ETHERPUP_TRAIL + (off>>9); 492 m->m_off -= 2 * sizeof (u_short); 493 m->m_len += 2 * sizeof (u_short); 494 *mtod(m, u_short *) = htons((u_short)ETHERPUP_IPTYPE); 495 *(mtod(m, u_short *) + 1) = htons((u_short)m->m_len); 496 goto gottrailertype; 497 } 498 type = ETHERPUP_IPTYPE; 499 off = 0; 500 goto gottype; 501 #endif 502 503 case AF_UNSPEC: 504 il = (struct ether_header *)dst->sa_data; 505 bcopy((caddr_t)il->ether_dhost, (caddr_t)edst, sizeof (edst)); 506 type = il->ether_type; 507 goto gottype; 508 509 default: 510 printf("il%d: can't handle af%d\n", ifp->if_unit, 511 dst->sa_family); 512 error = EAFNOSUPPORT; 513 goto bad; 514 } 515 516 gottrailertype: 517 /* 518 * Packet to be sent as trailer: move first packet 519 * (control information) to end of chain. 520 */ 521 while (m->m_next) 522 m = m->m_next; 523 m->m_next = m0; 524 m = m0->m_next; 525 m0->m_next = 0; 526 m0 = m; 527 528 gottype: 529 /* 530 * Add local net header. If no space in first mbuf, 531 * allocate another. 532 */ 533 if (m->m_off > MMAXOFF || 534 MMINOFF + sizeof (struct ether_header) > m->m_off) { 535 m = m_get(M_DONTWAIT, MT_HEADER); 536 if (m == 0) { 537 error = ENOBUFS; 538 goto bad; 539 } 540 m->m_next = m0; 541 m->m_off = MMINOFF; 542 m->m_len = sizeof (struct ether_header); 543 } else { 544 m->m_off -= sizeof (struct ether_header); 545 m->m_len += sizeof (struct ether_header); 546 } 547 il = mtod(m, struct ether_header *); 548 il->ether_type = htons((u_short)type); 549 bcopy((caddr_t)edst, (caddr_t)il->ether_dhost, sizeof (edst)); 550 bcopy((caddr_t)is->is_addr, (caddr_t)il->ether_shost, 6); 551 552 /* 553 * Queue message on interface, and start output if interface 554 * not yet active. 555 */ 556 s = splimp(); 557 if (IF_QFULL(&ifp->if_snd)) { 558 IF_DROP(&ifp->if_snd); 559 splx(s); 560 m_freem(m); 561 return (ENOBUFS); 562 } 563 IF_ENQUEUE(&ifp->if_snd, m); 564 if ((is->is_flags & ILF_OACTIVE) == 0) 565 ilstart(ifp->if_unit); 566 splx(s); 567 return (0); 568 569 bad: 570 m_freem(m0); 571 return (error); 572 } 573 574 /* 575 * Watchdog routine, request statistics from board. 576 */ 577 ilwatch(unit) 578 int unit; 579 { 580 register struct il_softc *is = &il_softc[unit]; 581 register struct ifnet *ifp = &is->is_if; 582 int s; 583 584 if (is->is_flags & ILF_STATPENDING) { 585 ifp->if_timer = is->is_scaninterval; 586 return; 587 } 588 s = splimp(); 589 is->is_flags |= ILF_STATPENDING; 590 if ((is->is_flags & ILF_OACTIVE) == 0) 591 ilstart(ifp->if_unit); 592 splx(s); 593 ifp->if_timer = is->is_scaninterval; 594 } 595 596 /* 597 * Total up the on-board statistics. 598 */ 599 iltotal(is) 600 register struct il_softc *is; 601 { 602 register u_short *interval, *sum, *end; 603 604 interval = &is->is_stats.ils_frames; 605 sum = &is->is_sum.ils_frames; 606 end = is->is_sum.ils_fill2; 607 while (sum < end) 608 *sum++ += *interval++; 609 is->is_if.if_collisions = is->is_sum.ils_collis; 610 } 611