1 /* if_il.c 4.12 82/10/10 */ 2 3 #include "il.h" 4 5 /* 6 * Interlan Ethernet Communications Controller interface 7 */ 8 #include "../h/param.h" 9 #include "../h/systm.h" 10 #include "../h/mbuf.h" 11 #include "../h/pte.h" 12 #include "../h/buf.h" 13 #include "../h/protosw.h" 14 #include "../h/socket.h" 15 #include "../h/vmmac.h" 16 #include <errno.h> 17 18 #include "../net/if.h" 19 #include "../net/netisr.h" 20 #include "../net/route.h" 21 #include "../netinet/in.h" 22 #include "../netinet/in_systm.h" 23 #include "../netinet/ip.h" 24 #include "../netinet/ip_var.h" 25 #include "../netpup/pup.h" 26 27 #include "../vax/cpu.h" 28 #include "../vax/mtpr.h" 29 #include "../vaxif/if_ilreg.h" 30 #include "../vaxif/if_il.h" 31 #include "../vaxif/if_uba.h" 32 #include "../vaxuba/ubareg.h" 33 #include "../vaxuba/ubavar.h" 34 35 #define ILMTU 1500 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 u_char il_ectop[3] = { 0x02, 0x60, 0x8c }; 46 u_char ilbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 47 48 /* 49 * Ethernet software status per interface. 50 * 51 * Each interface is referenced by a network interface structure, 52 * is_if, which the routing code uses to locate the interface. 53 * This structure contains the output queue for the interface, its address, ... 54 * We also have, for each interface, a UBA interface structure, which 55 * contains information about the UNIBUS resources held by the interface: 56 * map registers, buffered data paths, etc. Information is cached in this 57 * structure for use by the if_uba.c routines in running the interface 58 * efficiently. 59 */ 60 struct il_softc { 61 struct ifnet is_if; /* network-visible interface */ 62 struct ifuba is_ifuba; /* UNIBUS resources */ 63 int is_flags; 64 #define ILF_OACTIVE 0x1 /* output is active */ 65 #define ILF_RCVPENDING 0x2 /* start rcv in ilcint */ 66 #define ILF_STATPENDING 0x4 /* stat cmd pending */ 67 short is_lastcmd; /* can't read csr, so must save it */ 68 short is_scaninterval; /* interval of stat collection */ 69 #define ILWATCHINTERVAL 60 /* once every 60 seconds */ 70 struct il_stats is_stats; /* holds on-board statistics */ 71 struct il_stats is_sum; /* summation over time */ 72 int is_ubaddr; /* mapping registers of is_stats */ 73 } il_softc[NIL]; 74 75 ilprobe(reg) 76 caddr_t reg; 77 { 78 register int br, cvec; /* r11, r10 value-result */ 79 register struct ildevice *addr = (struct ildevice *)reg; 80 register i; 81 82 #ifdef lint 83 br = 0; cvec = br; br = cvec; 84 ilrint(0); ilcint(0); ilwatch(0); 85 #endif 86 87 addr->il_csr = ILC_OFFLINE|IL_CIE; 88 DELAY(100000); 89 i = addr->il_csr; /* clear CDONE */ 90 if (cvec > 0 && cvec != 0x200) 91 cvec -= 4; 92 return (1); 93 } 94 95 /* 96 * Interface exists: make available by filling in network interface 97 * record. System will initialize the interface when it is ready 98 * to accept packets. A STATUS command is done to get the ethernet 99 * address and other interesting data. 100 */ 101 ilattach(ui) 102 struct uba_device *ui; 103 { 104 register struct il_softc *is = &il_softc[ui->ui_unit]; 105 register struct ifnet *ifp = &is->is_if; 106 register struct ildevice *addr = (struct ildevice *)ui->ui_addr; 107 struct sockaddr_in *sin; 108 109 ifp->if_unit = ui->ui_unit; 110 ifp->if_name = "il"; 111 ifp->if_mtu = ILMTU; 112 ifp->if_net = ui->ui_flags; 113 114 /* 115 * Reset the board and map the statistics 116 * buffer onto the Unibus. 117 */ 118 addr->il_csr = ILC_RESET; 119 while ((addr->il_csr&IL_CDONE) == 0) 120 ; 121 if (addr->il_csr&IL_STATUS) 122 printf("il%d: reset failed, csr=%b\n", ui->ui_unit, 123 addr->il_csr, IL_BITS); 124 125 is->is_ubaddr = uballoc(ui->ui_ubanum, &is->is_stats, 126 sizeof (struct il_stats), 0); 127 addr->il_bar = is->is_ubaddr & 0xffff; 128 addr->il_bcr = sizeof (struct il_stats); 129 addr->il_csr = ((is->is_ubaddr >> 2) & IL_EUA)|ILC_STAT; 130 while ((addr->il_csr&IL_CDONE) == 0) 131 ; 132 if (addr->il_csr&IL_STATUS) 133 printf("il%d: status failed, csr=%b\n", ui->ui_unit, 134 addr->il_csr, IL_BITS); 135 ubarelse(ui->ui_ubanum, &is->is_ubaddr); 136 printf("il%d: addr=%x:%x:%x:%x:%x:%x module=%s firmware=%s\n", 137 ui->ui_unit, 138 is->is_stats.ils_addr[0]&0xff, is->is_stats.ils_addr[1]&0xff, 139 is->is_stats.ils_addr[2]&0xff, is->is_stats.ils_addr[3]&0xff, 140 is->is_stats.ils_addr[4]&0xff, is->is_stats.ils_addr[5]&0xff, 141 is->is_stats.ils_module, is->is_stats.ils_firmware); 142 ifp->if_host[0] = 143 ((is->is_stats.ils_addr[3]&0xff)<<16) | 0x800000 | 144 ((is->is_stats.ils_addr[4]&0xff)<<8) | 145 (is->is_stats.ils_addr[5]&0xff); 146 sin = (struct sockaddr_in *)&ifp->if_addr; 147 sin->sin_family = AF_INET; 148 sin->sin_addr = if_makeaddr(ifp->if_net, ifp->if_host[0]); 149 150 sin = (struct sockaddr_in *)&ifp->if_broadaddr; 151 sin->sin_family = AF_INET; 152 sin->sin_addr = if_makeaddr(ifp->if_net, INADDR_ANY); 153 ifp->if_flags = IFF_BROADCAST; 154 155 ifp->if_init = ilinit; 156 ifp->if_output = iloutput; 157 ifp->if_ubareset = ilreset; 158 ifp->if_watchdog = ilwatch; 159 is->is_scaninterval = ILWATCHINTERVAL; 160 ifp->if_timer = is->is_scaninterval; 161 is->is_ifuba.ifu_flags = UBA_CANTWAIT; 162 #ifdef notdef 163 is->is_ifuba.ifu_flags |= UBA_NEEDBDP; 164 #endif 165 if_attach(ifp); 166 } 167 168 /* 169 * Reset of interface after UNIBUS reset. 170 * If interface is on specified uba, reset its state. 171 */ 172 ilreset(unit, uban) 173 int unit, uban; 174 { 175 register struct uba_device *ui; 176 177 if (unit >= NIL || (ui = ilinfo[unit]) == 0 || ui->ui_alive == 0 || 178 ui->ui_ubanum != uban) 179 return; 180 printf(" il%d", unit); 181 ilinit(unit); 182 } 183 184 /* 185 * Initialization of interface; clear recorded pending 186 * operations, and reinitialize UNIBUS usage. 187 */ 188 ilinit(unit) 189 int unit; 190 { 191 register struct il_softc *is = &il_softc[unit]; 192 register struct uba_device *ui = ilinfo[unit]; 193 register struct ildevice *addr; 194 int s; 195 196 if (if_ubainit(&is->is_ifuba, ui->ui_ubanum, 197 sizeof (struct il_rheader), (int)btoc(ILMTU)) == 0) { 198 printf("il%d: can't initialize\n", unit); 199 is->is_if.if_flags &= ~IFF_UP; 200 return; 201 } 202 is->is_ubaddr = uballoc(ui->ui_ubanum, &is->is_stats, 203 sizeof (struct il_stats), 0); 204 addr = (struct ildevice *)ui->ui_addr; 205 206 /* 207 * Set board online. 208 * Hang receive buffer and start any pending 209 * writes by faking a transmit complete. 210 * Receive bcr is not a muliple of 4 so buffer 211 * chaining can't happen. 212 */ 213 s = splimp(); 214 addr->il_csr = ILC_ONLINE; 215 while ((addr->il_csr & IL_CDONE) == 0) 216 ; 217 addr->il_bar = is->is_ifuba.ifu_r.ifrw_info & 0xffff; 218 addr->il_bcr = sizeof(struct il_rheader) + ILMTU + 6; 219 addr->il_csr = 220 ((is->is_ifuba.ifu_r.ifrw_info >> 2) & IL_EUA)|ILC_RCV|IL_RIE; 221 while ((addr->il_csr & IL_CDONE) == 0) 222 ; 223 is->is_flags = ILF_OACTIVE; 224 is->is_if.if_flags |= IFF_UP; 225 is->is_lastcmd = 0; 226 ilcint(unit); 227 splx(s); 228 if_rtinit(&is->is_if, RTF_UP); 229 } 230 231 /* 232 * Start output on interface. 233 * Get another datagram to send off of the interface queue, 234 * and map it to the interface before starting the output. 235 */ 236 ilstart(dev) 237 dev_t dev; 238 { 239 int unit = ILUNIT(dev), dest, len; 240 struct uba_device *ui = ilinfo[unit]; 241 register struct il_softc *is = &il_softc[unit]; 242 register struct ildevice *addr; 243 struct mbuf *m; 244 short csr; 245 246 IF_DEQUEUE(&is->is_if.if_snd, m); 247 addr = (struct ildevice *)ui->ui_addr; 248 if (m == 0) { 249 if ((is->is_flags & ILF_STATPENDING) == 0) 250 return; 251 addr->il_bar = is->is_ubaddr & 0xfff; 252 addr->il_bcr = sizeof (struct il_stats); 253 csr = ((is->is_ubaddr >> 2) & IL_EUA)|ILC_STAT|IL_RIE|IL_CIE; 254 is->is_flags &= ~ILF_STATPENDING; 255 goto startcmd; 256 } 257 len = if_wubaput(&is->is_ifuba, m); 258 if (is->is_ifuba.ifu_flags & UBA_NEEDBDP) 259 UBAPURGE(is->is_ifuba.ifu_uba, is->is_ifuba.ifu_w.ifrw_bdp); 260 addr->il_bar = is->is_ifuba.ifu_w.ifrw_info & 0xffff; 261 addr->il_bcr = len; 262 csr = 263 ((is->is_ifuba.ifu_w.ifrw_info >> 2) & IL_EUA)|ILC_XMIT|IL_CIE|IL_RIE; 264 265 startcmd: 266 is->is_lastcmd = csr & IL_CMD; 267 addr->il_csr = csr; 268 is->is_flags |= ILF_OACTIVE; 269 } 270 271 /* 272 * Command done interrupt. 273 */ 274 ilcint(unit) 275 int unit; 276 { 277 register struct il_softc *is = &il_softc[unit]; 278 struct uba_device *ui = ilinfo[unit]; 279 register struct ildevice *addr = (struct ildevice *)ui->ui_addr; 280 short csr; 281 282 if ((is->is_flags & ILF_OACTIVE) == 0) { 283 printf("il%d: stray xmit interrupt, csr=%b\n", unit, 284 addr->il_csr, IL_BITS); 285 return; 286 } 287 288 csr = addr->il_csr; 289 /* 290 * Hang receive buffer if it couldn't 291 * be done earlier (in ilrint). 292 */ 293 if (is->is_flags & ILF_RCVPENDING) { 294 addr->il_bar = is->is_ifuba.ifu_r.ifrw_info & 0xffff; 295 addr->il_bcr = sizeof(struct il_rheader) + ILMTU + 6; 296 addr->il_csr = 297 ((is->is_ifuba.ifu_r.ifrw_info >> 2) & IL_EUA)|ILC_RCV|IL_RIE; 298 while ((addr->il_csr & IL_CDONE) == 0) 299 ; 300 is->is_flags &= ~ILF_RCVPENDING; 301 } 302 is->is_flags &= ~ILF_OACTIVE; 303 csr &= IL_STATUS; 304 switch (is->is_lastcmd) { 305 306 case ILC_XMIT: 307 is->is_if.if_opackets++; 308 if (csr > ILERR_RETRIES) 309 is->is_if.if_oerrors++; 310 break; 311 312 case ILC_STAT: 313 if (csr == ILERR_SUCCESS) 314 iltotal(is); 315 break; 316 } 317 if (is->is_ifuba.ifu_xtofree) { 318 m_freem(is->is_ifuba.ifu_xtofree); 319 is->is_ifuba.ifu_xtofree = 0; 320 } 321 ilstart(unit); 322 } 323 324 /* 325 * Ethernet interface receiver interrupt. 326 * If input error just drop packet. 327 * Otherwise purge input buffered data path and examine 328 * packet to determine type. If can't determine length 329 * from type, then have to drop packet. Othewise decapsulate 330 * packet based on type and pass to type specific higher-level 331 * input routine. 332 */ 333 ilrint(unit) 334 int unit; 335 { 336 register struct il_softc *is = &il_softc[unit]; 337 struct ildevice *addr = (struct ildevice *)ilinfo[unit]->ui_addr; 338 register struct il_rheader *il; 339 struct mbuf *m; 340 int len, off, resid; 341 register struct ifqueue *inq; 342 343 is->is_if.if_ipackets++; 344 if (is->is_ifuba.ifu_flags & UBA_NEEDBDP) 345 UBAPURGE(is->is_ifuba.ifu_uba, is->is_ifuba.ifu_r.ifrw_bdp); 346 il = (struct il_rheader *)(is->is_ifuba.ifu_r.ifrw_addr); 347 len = il->ilr_length - sizeof(struct il_rheader); 348 if ((il->ilr_status&(ILFSTAT_A|ILFSTAT_C)) || len < 46 || len > ILMTU) { 349 is->is_if.if_ierrors++; 350 #ifdef notdef 351 if (is->is_if.if_ierrors % 100 == 0) 352 printf("il%d: += 100 input errors\n", unit); 353 #endif 354 goto setup; 355 } 356 357 /* 358 * Deal with trailer protocol: if type is PUP trailer 359 * get true type from first 16-bit word past data. 360 * Remember that type was trailer by setting off. 361 */ 362 #define ildataaddr(il, off, type) ((type)(((caddr_t)((il)+1)+(off)))) 363 if (il->ilr_type >= ILPUP_TRAIL && 364 il->ilr_type < ILPUP_TRAIL+ILPUP_NTRAILER) { 365 off = (il->ilr_type - ILPUP_TRAIL) * 512; 366 if (off >= ILMTU) 367 goto setup; /* sanity */ 368 il->ilr_type = *ildataaddr(il, off, u_short *); 369 resid = *(ildataaddr(il, off+2, u_short *)); 370 if (off + resid > len) 371 goto setup; /* sanity */ 372 len = off + resid; 373 } else 374 off = 0; 375 if (len == 0) 376 goto setup; 377 378 /* 379 * Pull packet off interface. Off is nonzero if packet 380 * has trailing header; ilget will then force this header 381 * information to be at the front, but we still have to drop 382 * the type and length which are at the front of any trailer data. 383 */ 384 m = if_rubaget(&is->is_ifuba, len, off); 385 if (m == 0) 386 goto setup; 387 if (off) { 388 m->m_off += 2 * sizeof (u_short); 389 m->m_len -= 2 * sizeof (u_short); 390 } 391 switch (il->ilr_type) { 392 393 #ifdef INET 394 case ILPUP_IPTYPE: 395 schednetisr(NETISR_IP); 396 inq = &ipintrq; 397 break; 398 #endif 399 default: 400 m_freem(m); 401 goto setup; 402 } 403 404 if (IF_QFULL(inq)) { 405 IF_DROP(inq); 406 m_freem(m); 407 goto setup; 408 } 409 IF_ENQUEUE(inq, m); 410 411 setup: 412 /* 413 * Reset for next packet if possible. 414 * If waiting for transmit command completion, set flag 415 * and wait until command completes. 416 */ 417 if (is->is_flags & ILF_OACTIVE) { 418 is->is_flags |= ILF_RCVPENDING; 419 return; 420 } 421 addr->il_bar = is->is_ifuba.ifu_r.ifrw_info & 0xffff; 422 addr->il_bcr = sizeof(struct il_rheader) + ILMTU + 6; 423 addr->il_csr = 424 ((is->is_ifuba.ifu_r.ifrw_info >> 2) & IL_EUA)|ILC_RCV|IL_RIE; 425 while ((addr->il_csr & IL_CDONE) == 0) 426 ; 427 } 428 429 /* 430 * Ethernet output routine. 431 * Encapsulate a packet of type family for the local net. 432 * Use trailer local net encapsulation if enough data in first 433 * packet leaves a multiple of 512 bytes of data in remainder. 434 */ 435 iloutput(ifp, m0, dst) 436 struct ifnet *ifp; 437 struct mbuf *m0; 438 struct sockaddr *dst; 439 { 440 int type, dest, s, error; 441 register struct il_softc *is = &il_softc[ifp->if_unit]; 442 register struct mbuf *m = m0; 443 register struct il_xheader *il; 444 register int off, i; 445 446 switch (dst->sa_family) { 447 448 #ifdef INET 449 case AF_INET: 450 dest = ((struct sockaddr_in *)dst)->sin_addr.s_addr; 451 off = ntohs((u_short)mtod(m, struct ip *)->ip_len) - m->m_len; 452 if (off > 0 && (off & 0x1ff) == 0 && 453 m->m_off >= MMINOFF + 2 * sizeof (u_short)) { 454 type = ILPUP_TRAIL + (off>>9); 455 m->m_off -= 2 * sizeof (u_short); 456 m->m_len += 2 * sizeof (u_short); 457 *mtod(m, u_short *) = ILPUP_IPTYPE; 458 *(mtod(m, u_short *) + 1) = m->m_len; 459 goto gottrailertype; 460 } 461 type = ILPUP_IPTYPE; 462 off = 0; 463 goto gottype; 464 #endif 465 466 default: 467 printf("il%d: can't handle af%d\n", ifp->if_unit, 468 dst->sa_family); 469 error = EAFNOSUPPORT; 470 goto bad; 471 } 472 473 gottrailertype: 474 /* 475 * Packet to be sent as trailer: move first packet 476 * (control information) to end of chain. 477 */ 478 while (m->m_next) 479 m = m->m_next; 480 m->m_next = m0; 481 m = m0->m_next; 482 m0->m_next = 0; 483 m0 = m; 484 485 gottype: 486 /* 487 * Add local net header. If no space in first mbuf, 488 * allocate another. 489 */ 490 if (m->m_off > MMAXOFF || 491 MMINOFF + sizeof (struct il_xheader) > m->m_off) { 492 m = m_get(M_DONTWAIT); 493 if (m == 0) { 494 error = ENOBUFS; 495 goto bad; 496 } 497 m->m_next = m0; 498 m->m_off = MMINOFF; 499 m->m_len = sizeof (struct il_xheader); 500 } else { 501 m->m_off -= sizeof (struct il_xheader); 502 m->m_len += sizeof (struct il_xheader); 503 } 504 il = mtod(m, struct il_xheader *); 505 if ((dest &~ 0xff) == 0) 506 bcopy(ilbroadcastaddr, il->ilx_dhost, 6); 507 else { 508 u_char *to = dest & 0x8000 ? is->is_stats.ils_addr : il_ectop; 509 510 bcopy(to, il->ilx_dhost, 3); 511 il->ilx_dhost[3] = (dest>>8) & 0x7f; 512 il->ilx_dhost[4] = (dest>>16) & 0xff; 513 il->ilx_dhost[5] = (dest>>24) & 0xff; 514 } 515 il->ilx_type = type; 516 517 /* 518 * Queue message on interface, and start output if interface 519 * not yet active. 520 */ 521 s = splimp(); 522 if (IF_QFULL(&ifp->if_snd)) { 523 IF_DROP(&ifp->if_snd); 524 splx(s); 525 m_freem(m); 526 return (ENOBUFS); 527 } 528 IF_ENQUEUE(&ifp->if_snd, m); 529 if ((is->is_flags & ILF_OACTIVE) == 0) 530 ilstart(ifp->if_unit); 531 splx(s); 532 return (0); 533 534 bad: 535 m_freem(m0); 536 return (error); 537 } 538 539 /* 540 * Watchdog routine, request statistics from board. 541 */ 542 ilwatch(unit) 543 int unit; 544 { 545 register struct il_softc *is = &il_softc[unit]; 546 register struct ifnet *ifp = &is->is_if; 547 int s; 548 549 if (is->is_flags & ILF_STATPENDING) { 550 ifp->if_timer = is->is_scaninterval; 551 return; 552 } 553 s = splimp(); 554 is->is_flags |= ILF_STATPENDING; 555 if ((is->is_flags & ILF_OACTIVE) == 0) 556 ilstart(ifp->if_unit); 557 splx(s); 558 ifp->if_timer = is->is_scaninterval; 559 } 560 561 /* 562 * Total up the on-board statistics. 563 */ 564 iltotal(is) 565 register struct il_softc *is; 566 { 567 register u_short *interval, *sum, *end; 568 569 interval = &is->is_stats.ils_frames; 570 sum = &is->is_sum.ils_frames; 571 end = is->is_sum.ils_fill2; 572 while (sum < end) 573 *sum++ += *interval++; 574 is->is_if.if_collisions = is->is_sum.ils_collis; 575 } 576