1 /* if_il.c 4.9 82/06/23 */ 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/ubareg.h" 16 #include "../h/ubavar.h" 17 #include "../h/ilreg.h" 18 #include "../h/cpu.h" 19 #include "../h/mtpr.h" 20 #include "../h/vmmac.h" 21 #include "../net/in.h" 22 #include "../net/in_systm.h" 23 #include "../net/if.h" 24 #include "../net/if_il.h" 25 #include "../net/if_uba.h" 26 #include "../net/ip.h" 27 #include "../net/ip_var.h" 28 #include "../net/pup.h" 29 #include "../net/route.h" 30 #include <errno.h> 31 32 #define ILMTU 1500 33 34 int ilprobe(), ilattach(), ilrint(), ilcint(); 35 struct uba_device *ilinfo[NIL]; 36 u_short ilstd[] = { 0 }; 37 struct uba_driver ildriver = 38 { ilprobe, 0, ilattach, 0, ilstd, "il", ilinfo }; 39 #define ILUNIT(x) minor(x) 40 int ilinit(),iloutput(),ilreset(),ilwatch(); 41 42 u_char il_ectop[3] = { 0x02, 0x60, 0x8c }; 43 u_char ilbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 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 ifnet is_if; /* network-visible interface */ 59 struct ifuba is_ifuba; /* UNIBUS resources */ 60 int is_flags; 61 #define ILF_OACTIVE 0x1 /* output is active */ 62 #define ILF_RCVPENDING 0x2 /* start rcv in ilcint */ 63 #define ILF_STATPENDING 0x4 /* stat cmd pending */ 64 short is_lastcmd; /* can't read csr, so must save it */ 65 short is_scaninterval; /* interval of stat collection */ 66 #define ILWATCHINTERVAL 60 /* once every 60 seconds */ 67 struct il_stats is_stats; /* holds on-board statistics */ 68 struct il_stats is_sum; /* summation over time */ 69 int is_ubaddr; /* mapping registers of is_stats */ 70 } il_softc[NIL]; 71 72 ilprobe(reg) 73 caddr_t reg; 74 { 75 register int br, cvec; /* r11, r10 value-result */ 76 register struct ildevice *addr = (struct ildevice *)reg; 77 register i; 78 79 #ifdef lint 80 br = 0; cvec = br; br = cvec; 81 ilrint(0); ilcint(0); ilwatch(0); 82 #endif 83 84 addr->il_csr = ILC_OFFLINE|IL_CIE; 85 DELAY(100000); 86 i = addr->il_csr; /* clear CDONE */ 87 if (cvec > 0 && cvec != 0x200) 88 cvec -= 4; 89 return (1); 90 } 91 92 /* 93 * Interface exists: make available by filling in network interface 94 * record. System will initialize the interface when it is ready 95 * to accept packets. A STATUS command is done to get the ethernet 96 * address and other interesting data. 97 */ 98 ilattach(ui) 99 struct uba_device *ui; 100 { 101 register struct il_softc *is = &il_softc[ui->ui_unit]; 102 register struct ifnet *ifp = &is->is_if; 103 register struct ildevice *addr = (struct ildevice *)ui->ui_addr; 104 struct sockaddr_in *sin; 105 106 ifp->if_unit = ui->ui_unit; 107 ifp->if_name = "il"; 108 ifp->if_mtu = ILMTU; 109 ifp->if_net = ui->ui_flags; 110 111 /* 112 * Reset the board and map the statistics 113 * buffer onto the Unibus. 114 */ 115 addr->il_csr = ILC_RESET; 116 while ((addr->il_csr&IL_CDONE) == 0) 117 ; 118 if (addr->il_csr&IL_STATUS) 119 printf("il%d: reset failed, csr=%b\n", ui->ui_unit, 120 addr->il_csr, IL_BITS); 121 122 is->is_ubaddr = uballoc(ui->ui_ubanum, &is->is_stats, 123 sizeof (struct il_stats), 0); 124 addr->il_bar = is->is_ubaddr & 0xffff; 125 addr->il_bcr = sizeof (struct il_stats); 126 addr->il_csr = ((is->is_ubaddr >> 2) & IL_EUA)|ILC_STAT; 127 while ((addr->il_csr&IL_CDONE) == 0) 128 ; 129 if (addr->il_csr&IL_STATUS) 130 printf("il%d: status failed, csr=%b\n", ui->ui_unit, 131 addr->il_csr, IL_BITS); 132 ubarelse(ui->ui_ubanum, &is->is_ubaddr); 133 printf("il%d: addr=%x:%x:%x:%x:%x:%x module=%s firmware=%s\n", 134 ui->ui_unit, 135 is->is_stats.ils_addr[0]&0xff, is->is_stats.ils_addr[1]&0xff, 136 is->is_stats.ils_addr[2]&0xff, is->is_stats.ils_addr[3]&0xff, 137 is->is_stats.ils_addr[4]&0xff, is->is_stats.ils_addr[5]&0xff, 138 is->is_stats.ils_module, is->is_stats.ils_firmware); 139 ifp->if_host[0] = 140 ((is->is_stats.ils_addr[3]&0xff)<<16) | 0x800000 | 141 ((is->is_stats.ils_addr[4]&0xff)<<8) | 142 (is->is_stats.ils_addr[5]&0xff); 143 sin = (struct sockaddr_in *)&ifp->if_addr; 144 sin->sin_family = AF_INET; 145 sin->sin_addr = if_makeaddr(ifp->if_net, ifp->if_host[0]); 146 147 sin = (struct sockaddr_in *)&ifp->if_broadaddr; 148 sin->sin_family = AF_INET; 149 sin->sin_addr = if_makeaddr(ifp->if_net, INADDR_ANY); 150 ifp->if_flags = IFF_BROADCAST; 151 152 ifp->if_init = ilinit; 153 ifp->if_output = iloutput; 154 ifp->if_ubareset = ilreset; 155 ifp->if_watchdog = ilwatch; 156 is->is_scaninterval = ILWATCHINTERVAL; 157 ifp->if_timer = is->is_scaninterval; 158 is->is_ifuba.ifu_flags = UBA_CANTWAIT; 159 #ifdef notdef 160 is->is_ifuba.ifu_flags |= UBA_NEEDBDP; 161 #endif 162 if_attach(ifp); 163 } 164 165 /* 166 * Reset of interface after UNIBUS reset. 167 * If interface is on specified uba, reset its state. 168 */ 169 ilreset(unit, uban) 170 int unit, uban; 171 { 172 register struct uba_device *ui; 173 174 if (unit >= NIL || (ui = ilinfo[unit]) == 0 || ui->ui_alive == 0 || 175 ui->ui_ubanum != uban) 176 return; 177 printf(" il%d", unit); 178 ilinit(unit); 179 } 180 181 /* 182 * Initialization of interface; clear recorded pending 183 * operations, and reinitialize UNIBUS usage. 184 */ 185 ilinit(unit) 186 int unit; 187 { 188 register struct il_softc *is = &il_softc[unit]; 189 register struct uba_device *ui = ilinfo[unit]; 190 register struct ildevice *addr; 191 int s; 192 193 if (if_ubainit(&is->is_ifuba, ui->ui_ubanum, 194 sizeof (struct il_rheader), (int)btoc(ILMTU)) == 0) { 195 printf("il%d: can't initialize\n", unit); 196 is->is_if.if_flags &= ~IFF_UP; 197 return; 198 } 199 is->is_ubaddr = uballoc(ui->ui_ubanum, &is->is_stats, 200 sizeof (struct il_stats), 0); 201 addr = (struct ildevice *)ui->ui_addr; 202 203 /* 204 * Set board online. 205 * Hang receive buffer and start any pending 206 * writes by faking a transmit complete. 207 * Receive bcr is not a muliple of 4 so buffer 208 * chaining can't happen. 209 */ 210 s = splimp(); 211 addr->il_csr = ILC_ONLINE; 212 while ((addr->il_csr & IL_CDONE) == 0) 213 ; 214 addr->il_bar = is->is_ifuba.ifu_r.ifrw_info & 0xffff; 215 addr->il_bcr = sizeof(struct il_rheader) + ILMTU + 6; 216 addr->il_csr = 217 ((is->is_ifuba.ifu_r.ifrw_info >> 2) & IL_EUA)|ILC_RCV|IL_RIE; 218 while ((addr->il_csr & IL_CDONE) == 0) 219 ; 220 is->is_flags = ILF_OACTIVE; 221 is->is_if.if_flags |= IFF_UP; 222 is->is_lastcmd = 0; 223 ilcint(unit); 224 splx(s); 225 if_rtinit(&is->is_if, RTF_UP); 226 } 227 228 /* 229 * Start output on interface. 230 * Get another datagram to send off of the interface queue, 231 * and map it to the interface before starting the output. 232 */ 233 ilstart(dev) 234 dev_t dev; 235 { 236 int unit = ILUNIT(dev), dest, len; 237 struct uba_device *ui = ilinfo[unit]; 238 register struct il_softc *is = &il_softc[unit]; 239 register struct ildevice *addr; 240 struct mbuf *m; 241 short csr; 242 243 IF_DEQUEUE(&is->is_if.if_snd, m); 244 addr = (struct ildevice *)ui->ui_addr; 245 if (m == 0) { 246 if ((is->is_flags & ILF_STATPENDING) == 0) 247 return; 248 addr->il_bar = is->is_ubaddr & 0xfff; 249 addr->il_bcr = sizeof (struct il_stats); 250 csr = ((is->is_ubaddr >> 2) & IL_EUA)|ILC_STAT|IL_RIE|IL_CIE; 251 is->is_flags &= ~ILF_STATPENDING; 252 goto startcmd; 253 } 254 len = if_wubaput(&is->is_ifuba, m); 255 if (is->is_ifuba.ifu_flags & UBA_NEEDBDP) 256 UBAPURGE(is->is_ifuba.ifu_uba, is->is_ifuba.ifu_w.ifrw_bdp); 257 addr->il_bar = is->is_ifuba.ifu_w.ifrw_info & 0xffff; 258 addr->il_bcr = len; 259 csr = 260 ((is->is_ifuba.ifu_w.ifrw_info >> 2) & IL_EUA)|ILC_XMIT|IL_CIE|IL_RIE; 261 262 startcmd: 263 is->is_lastcmd = csr & IL_CMD; 264 addr->il_csr = csr; 265 is->is_flags |= ILF_OACTIVE; 266 } 267 268 /* 269 * Command done interrupt. 270 */ 271 ilcint(unit) 272 int unit; 273 { 274 register struct il_softc *is = &il_softc[unit]; 275 struct uba_device *ui = ilinfo[unit]; 276 register struct ildevice *addr = (struct ildevice *)ui->ui_addr; 277 short status; 278 279 if ((is->is_flags & ILF_OACTIVE) == 0) { 280 printf("il%d: stray xmit interrupt, csr=%b\n", unit, 281 addr->il_csr, IL_BITS); 282 return; 283 } 284 285 /* 286 * Hang receive buffer if it couldn't 287 * be done earlier (in ilrint). 288 */ 289 if (is->is_flags & ILF_RCVPENDING) { 290 addr->il_bar = is->is_ifuba.ifu_r.ifrw_info & 0xffff; 291 addr->il_bcr = sizeof(struct il_rheader) + ILMTU + 6; 292 addr->il_csr = 293 ((is->is_ifuba.ifu_r.ifrw_info >> 2) & IL_EUA)|ILC_RCV|IL_RIE; 294 while ((addr->il_csr & IL_CDONE) == 0) 295 ; 296 is->is_flags &= ~ILF_RCVPENDING; 297 } 298 is->is_flags &= ~ILF_OACTIVE; 299 status = addr->il_csr & IL_STATUS; 300 switch (is->is_lastcmd) { 301 302 case ILC_XMIT: 303 is->is_if.if_opackets++; 304 if (status > ILERR_RETRIES) 305 is->is_if.if_oerrors++; 306 break; 307 308 case ILC_STAT: 309 if (status == ILERR_SUCCESS) 310 iltotal(is); 311 break; 312 } 313 if (is->is_ifuba.ifu_xtofree) { 314 m_freem(is->is_ifuba.ifu_xtofree); 315 is->is_ifuba.ifu_xtofree = 0; 316 } 317 ilstart(unit); 318 } 319 320 /* 321 * Ethernet interface receiver interrupt. 322 * If input error just drop packet. 323 * Otherwise purge input buffered data path and examine 324 * packet to determine type. If can't determine length 325 * from type, then have to drop packet. Othewise decapsulate 326 * packet based on type and pass to type specific higher-level 327 * input routine. 328 */ 329 ilrint(unit) 330 int unit; 331 { 332 register struct il_softc *is = &il_softc[unit]; 333 struct ildevice *addr = (struct ildevice *)ilinfo[unit]->ui_addr; 334 register struct il_rheader *il; 335 struct mbuf *m; 336 int len, off, resid; 337 register struct ifqueue *inq; 338 339 is->is_if.if_ipackets++; 340 if (is->is_ifuba.ifu_flags & UBA_NEEDBDP) 341 UBAPURGE(is->is_ifuba.ifu_uba, is->is_ifuba.ifu_r.ifrw_bdp); 342 il = (struct il_rheader *)(is->is_ifuba.ifu_r.ifrw_addr); 343 len = il->ilr_length - sizeof(struct il_rheader); 344 if ((il->ilr_status&(ILFSTAT_A|ILFSTAT_C)) || len < 46 || len > ILMTU) { 345 is->is_if.if_ierrors++; 346 #ifdef notdef 347 if (is->is_if.if_ierrors % 100 == 0) 348 printf("il%d: += 100 input errors\n", unit); 349 #endif 350 goto setup; 351 } 352 353 /* 354 * Deal with trailer protocol: if type is PUP trailer 355 * get true type from first 16-bit word past data. 356 * Remember that type was trailer by setting off. 357 */ 358 #define ildataaddr(il, off, type) ((type)(((caddr_t)((il)+1)+(off)))) 359 if (il->ilr_type >= ILPUP_TRAIL && 360 il->ilr_type < ILPUP_TRAIL+ILPUP_NTRAILER) { 361 off = (il->ilr_type - ILPUP_TRAIL) * 512; 362 if (off >= ILMTU) 363 goto setup; /* sanity */ 364 il->ilr_type = *ildataaddr(il, off, u_short *); 365 resid = *(ildataaddr(il, off+2, u_short *)); 366 if (off + resid > len) 367 goto setup; /* sanity */ 368 len = off + resid; 369 } else 370 off = 0; 371 if (len == 0) 372 goto setup; 373 374 /* 375 * Pull packet off interface. Off is nonzero if packet 376 * has trailing header; ilget will then force this header 377 * information to be at the front, but we still have to drop 378 * the type and length which are at the front of any trailer data. 379 */ 380 m = if_rubaget(&is->is_ifuba, len, off); 381 if (m == 0) 382 goto setup; 383 if (off) { 384 m->m_off += 2 * sizeof (u_short); 385 m->m_len -= 2 * sizeof (u_short); 386 } 387 switch (il->ilr_type) { 388 389 #ifdef INET 390 case ILPUP_IPTYPE: 391 schednetisr(NETISR_IP); 392 inq = &ipintrq; 393 break; 394 #endif 395 default: 396 m_freem(m); 397 goto setup; 398 } 399 400 if (IF_QFULL(inq)) { 401 IF_DROP(inq); 402 m_freem(m); 403 goto setup; 404 } 405 IF_ENQUEUE(inq, m); 406 407 setup: 408 /* 409 * Reset for next packet if possible. 410 * If waiting for transmit command completion, set flag 411 * and wait until command completes. 412 */ 413 if (is->is_flags & ILF_OACTIVE) { 414 is->is_flags |= ILF_RCVPENDING; 415 return; 416 } 417 addr->il_bar = is->is_ifuba.ifu_r.ifrw_info & 0xffff; 418 addr->il_bcr = sizeof(struct il_rheader) + ILMTU + 6; 419 addr->il_csr = 420 ((is->is_ifuba.ifu_r.ifrw_info >> 2) & IL_EUA)|ILC_RCV|IL_RIE; 421 while ((addr->il_csr & IL_CDONE) == 0) 422 ; 423 } 424 425 /* 426 * Ethernet output routine. 427 * Encapsulate a packet of type family for the local net. 428 * Use trailer local net encapsulation if enough data in first 429 * packet leaves a multiple of 512 bytes of data in remainder. 430 */ 431 iloutput(ifp, m0, dst) 432 struct ifnet *ifp; 433 struct mbuf *m0; 434 struct sockaddr *dst; 435 { 436 int type, dest, s, error; 437 register struct il_softc *is = &il_softc[ifp->if_unit]; 438 register struct mbuf *m = m0; 439 register struct il_xheader *il; 440 register int off, i; 441 442 switch (dst->sa_family) { 443 444 #ifdef INET 445 case AF_INET: 446 dest = ((struct sockaddr_in *)dst)->sin_addr.s_addr; 447 off = ntohs((u_short)mtod(m, struct ip *)->ip_len) - m->m_len; 448 if (off > 0 && (off & 0x1ff) == 0 && 449 m->m_off >= MMINOFF + 2 * sizeof (u_short)) { 450 type = ILPUP_TRAIL + (off>>9); 451 m->m_off -= 2 * sizeof (u_short); 452 m->m_len += 2 * sizeof (u_short); 453 *mtod(m, u_short *) = ILPUP_IPTYPE; 454 *(mtod(m, u_short *) + 1) = m->m_len; 455 goto gottrailertype; 456 } 457 type = ILPUP_IPTYPE; 458 off = 0; 459 goto gottype; 460 #endif 461 462 default: 463 printf("il%d: can't handle af%d\n", ifp->if_unit, 464 dst->sa_family); 465 error = EAFNOSUPPORT; 466 goto bad; 467 } 468 469 gottrailertype: 470 /* 471 * Packet to be sent as trailer: move first packet 472 * (control information) to end of chain. 473 */ 474 while (m->m_next) 475 m = m->m_next; 476 m->m_next = m0; 477 m = m0->m_next; 478 m0->m_next = 0; 479 m0 = m; 480 481 gottype: 482 /* 483 * Add local net header. If no space in first mbuf, 484 * allocate another. 485 */ 486 if (m->m_off > MMAXOFF || 487 MMINOFF + sizeof (struct il_xheader) > m->m_off) { 488 m = m_get(M_DONTWAIT); 489 if (m == 0) { 490 error = ENOBUFS; 491 goto bad; 492 } 493 m->m_next = m0; 494 m->m_off = MMINOFF; 495 m->m_len = sizeof (struct il_xheader); 496 } else { 497 m->m_off -= sizeof (struct il_xheader); 498 m->m_len += sizeof (struct il_xheader); 499 } 500 il = mtod(m, struct il_xheader *); 501 if ((dest &~ 0xff) == 0) 502 bcopy(ilbroadcastaddr, il->ilx_dhost, 6); 503 else { 504 u_char *to = dest & 0x8000 ? is->is_stats.ils_addr : il_ectop; 505 506 bcopy(to, il->ilx_dhost, 3); 507 il->ilx_dhost[3] = (dest>>8) & 0x7f; 508 il->ilx_dhost[4] = (dest>>16) & 0xff; 509 il->ilx_dhost[5] = (dest>>24) & 0xff; 510 } 511 il->ilx_type = type; 512 513 /* 514 * Queue message on interface, and start output if interface 515 * not yet active. 516 */ 517 s = splimp(); 518 if (IF_QFULL(&ifp->if_snd)) { 519 IF_DROP(&ifp->if_snd); 520 splx(s); 521 m_freem(m); 522 return (ENOBUFS); 523 } 524 IF_ENQUEUE(&ifp->if_snd, m); 525 if ((is->is_flags & ILF_OACTIVE) == 0) 526 ilstart(ifp->if_unit); 527 splx(s); 528 return (0); 529 530 bad: 531 m_freem(m0); 532 return (error); 533 } 534 535 /* 536 * Watchdog routine, request statistics from board. 537 */ 538 ilwatch(unit) 539 int unit; 540 { 541 register struct il_softc *is = &il_softc[unit]; 542 register struct ifnet *ifp = &is->is_if; 543 int s; 544 545 if (is->is_flags & ILF_STATPENDING) { 546 ifp->if_timer = is->is_scaninterval; 547 return; 548 } 549 s = splimp(); 550 is->is_flags |= ILF_STATPENDING; 551 if ((is->is_flags & ILF_OACTIVE) == 0) 552 ilstart(ifp->if_unit); 553 splx(s); 554 ifp->if_timer = is->is_scaninterval; 555 } 556 557 /* 558 * Total up the on-board statistics. 559 */ 560 iltotal(is) 561 register struct il_softc *is; 562 { 563 register u_short *interval, *sum, *end; 564 565 interval = &is->is_stats.ils_frames; 566 sum = &is->is_sum.ils_frames; 567 end = is->is_sum.ils_fill2; 568 while (sum < end) 569 *sum++ += *interval++; 570 is->is_if.if_collisions = is->is_sum.ils_collis; 571 } 572