1 /* $NetBSD: smc90cx6.c,v 1.77 2024/09/08 09:36:50 rillig Exp $ */ 2 3 /*- 4 * Copyright (c) 1994, 1995, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Ignatios Souvatzis. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Chip core driver for the SMC90c26 / SMC90c56 (and SMC90c66 in '56 34 * compatibility mode) boards 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: smc90cx6.c,v 1.77 2024/09/08 09:36:50 rillig Exp $"); 39 40 /* #define BAHSOFTCOPY */ 41 #define BAHRETRANSMIT /**/ 42 43 #include "opt_inet.h" 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/mbuf.h> 48 #include <sys/buf.h> 49 #include <sys/device.h> 50 #include <sys/protosw.h> 51 #include <sys/socket.h> 52 #include <sys/syslog.h> 53 #include <sys/ioctl.h> 54 #include <sys/errno.h> 55 #include <sys/kernel.h> 56 #include <sys/intr.h> 57 58 #include <net/if.h> 59 #include <net/if_dl.h> 60 #include <net/if_ether.h> 61 #include <net/if_types.h> 62 #include <net/if_arc.h> 63 #include <net/bpf.h> 64 65 #ifdef INET 66 #include <netinet/in.h> 67 #include <netinet/in_systm.h> 68 #include <netinet/in_var.h> 69 #include <netinet/ip.h> 70 #include <netinet/if_inarp.h> 71 #endif 72 73 #include <sys/bus.h> 74 #include <sys/cpu.h> 75 76 #include <dev/ic/smc90cx6reg.h> 77 #include <dev/ic/smc90cx6var.h> 78 79 /* these should be elsewhere */ 80 81 #define ARC_MIN_LEN 1 82 #define ARC_MIN_FORBID_LEN 254 83 #define ARC_MAX_FORBID_LEN 256 84 #define ARC_MAX_LEN 508 85 #define ARC_ADDR_LEN 1 86 87 /* for watchdog timer. This should be more than enough. */ 88 #define ARCTIMEOUT (5*IFNET_SLOWHZ) 89 90 /* 91 * This currently uses 2 bufs for tx, 2 for rx 92 * 93 * New rx protocol: 94 * 95 * rx has a fillcount variable. If fillcount > (NRXBUF-1), 96 * rx can be switched off from rx hard int. 97 * Else rx is restarted on the other receiver. 98 * rx soft int counts down. if it is == (NRXBUF-1), it restarts 99 * the receiver. 100 * To ensure packet ordering (we need that for 1201 later), we have a counter 101 * which is incremented modulo 256 on each receive and a per buffer 102 * variable, which is set to the counter on filling. The soft int can 103 * compare both values to determine the older packet. 104 * 105 * Transmit direction: 106 * 107 * bah_start checks tx_fillcount 108 * case 2: return 109 * 110 * else fill tx_act ^ 1 && inc tx_fillcount 111 * 112 * check tx_fillcount again. 113 * case 2: set IFF_OACTIVE to stop arc_output from filling us. 114 * case 1: start tx 115 * 116 * tint clears IFF_OCATIVE, decrements and checks tx_fillcount 117 * case 1: start tx on tx_act ^ 1, softcall bah_start 118 * case 0: softcall bah_start 119 * 120 * #define fill(i) get mbuf && copy mbuf to chip(i) 121 */ 122 123 void bah_init(struct bah_softc *); 124 void bah_reset(struct bah_softc *); 125 void bah_stop(struct bah_softc *); 126 void bah_start(struct ifnet *); 127 int bahintr(void *); 128 int bah_ioctl(struct ifnet *, unsigned long, void *); 129 void bah_watchdog(struct ifnet *); 130 void bah_srint(void *vsc); 131 static void bah_tint(struct bah_softc *, int); 132 void bah_reconwatch(void *); 133 134 /* short notation */ 135 136 #define GETREG(off) bus_space_read_1(bst_r, regs, (off)) 137 #define PUTREG(off, v) bus_space_write_1(bst_r, regs, (off), (v)) 138 #define GETMEM(off) bus_space_read_1(bst_m, mem, (off)) 139 #define PUTMEM(off, v) bus_space_write_1(bst_m, mem, (off), (v)) 140 141 int 142 bah_attach_subr(struct bah_softc *sc) 143 { 144 struct ifnet *ifp = &sc->sc_arccom.ac_if; 145 int s, rv; 146 u_int8_t linkaddress; 147 148 bus_space_tag_t bst_r = sc->sc_bst_r; 149 bus_space_tag_t bst_m = sc->sc_bst_m; 150 bus_space_handle_t regs = sc->sc_regs; 151 bus_space_handle_t mem = sc->sc_mem; 152 153 s = splhigh(); 154 155 /* 156 * read the arcnet address from the board 157 */ 158 159 (*sc->sc_reset)(sc, 1); 160 161 do { 162 delay(200); 163 } while (!(GETREG(BAHSTAT) & BAH_POR)); 164 165 linkaddress = GETMEM(BAHMACOFF); 166 167 printf(": link addr 0x%02x(%d)\n", linkaddress, linkaddress); 168 169 /* clear the int mask... */ 170 171 sc->sc_intmask = 0; 172 PUTREG(BAHSTAT, 0); 173 174 PUTREG(BAHCMD, BAH_CONF(CONF_LONG)); 175 PUTREG(BAHCMD, BAH_CLR(CLR_POR|CLR_RECONFIG)); 176 sc->sc_recontime = sc->sc_reconcount = 0; 177 178 /* and reenable kernel int level */ 179 splx(s); 180 181 /* 182 * set interface to stopped condition (reset) 183 */ 184 bah_stop(sc); 185 186 strlcpy(ifp->if_xname, device_xname(sc->sc_dev), IFNAMSIZ); 187 ifp->if_softc = sc; 188 ifp->if_start = bah_start; 189 ifp->if_ioctl = bah_ioctl; 190 ifp->if_timer = 0; 191 ifp->if_watchdog = bah_watchdog; 192 IFQ_SET_READY(&ifp->if_snd); 193 194 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX; 195 196 ifp->if_mtu = ARCMTU; 197 198 rv = arc_ifattach(ifp, linkaddress); 199 if (rv != 0) 200 return rv; 201 if_deferred_start_init(ifp, NULL); 202 203 #ifdef BAHSOFTCOPY 204 sc->sc_rxcookie = softint_establish(SOFTINT_NET, bah_srint, sc); 205 sc->sc_txcookie = softint_establish(SOFTINT_NET, 206 (void (*)(void *))bah_start, ifp); 207 #endif 208 209 callout_init(&sc->sc_recon_ch, 0); 210 return 0; 211 } 212 213 /* 214 * Initialize device 215 * 216 */ 217 void 218 bah_init(struct bah_softc *sc) 219 { 220 struct ifnet *ifp; 221 int s; 222 223 ifp = &sc->sc_arccom.ac_if; 224 225 if ((ifp->if_flags & IFF_RUNNING) == 0) { 226 s = splnet(); 227 ifp->if_flags |= IFF_RUNNING; 228 bah_reset(sc); 229 bah_start(ifp); 230 splx(s); 231 } 232 } 233 234 /* 235 * Reset the interface... 236 * 237 * this assumes that it is called inside a critical section... 238 * 239 */ 240 void 241 bah_reset(struct bah_softc *sc) 242 { 243 struct ifnet *ifp; 244 uint8_t linkaddress; 245 246 bus_space_tag_t bst_r = sc->sc_bst_r; 247 bus_space_tag_t bst_m = sc->sc_bst_m; 248 bus_space_handle_t regs = sc->sc_regs; 249 bus_space_handle_t mem = sc->sc_mem; 250 251 ifp = &sc->sc_arccom.ac_if; 252 253 #ifdef BAH_DEBUG 254 printf("%s: reset\n", device_xname(sc->sc_dev)); 255 #endif 256 /* stop and restart hardware */ 257 258 (*sc->sc_reset)(sc, 1); 259 do { 260 DELAY(200); 261 } while (!(GETREG(BAHSTAT) & BAH_POR)); 262 263 linkaddress = GETMEM(BAHMACOFF); 264 265 #if defined(BAH_DEBUG) && (BAH_DEBUG > 2) 266 printf("%s: reset: card reset, link addr = 0x%02x (%u)\n", 267 device_xname(sc->sc_dev), linkaddress, linkaddress); 268 #endif 269 270 /* tell the routing level about the (possibly changed) link address */ 271 if_set_sadl(ifp, &linkaddress, sizeof(linkaddress), false); 272 273 /* POR is NMI, but we need it below: */ 274 sc->sc_intmask = BAH_RECON|BAH_POR; 275 PUTREG(BAHSTAT, sc->sc_intmask); 276 PUTREG(BAHCMD, BAH_CONF(CONF_LONG)); 277 278 #ifdef BAH_DEBUG 279 printf("%s: reset: chip configured, status=0x%02x\n", 280 device_xname(sc->sc_dev), GETREG(BAHSTAT)); 281 #endif 282 PUTREG(BAHCMD, BAH_CLR(CLR_POR|CLR_RECONFIG)); 283 284 #ifdef BAH_DEBUG 285 printf("%s: reset: bits cleared, status=0x%02x\n", 286 device_xname(sc->sc_dev), GETREG(BAHSTAT)); 287 #endif 288 289 sc->sc_reconcount_excessive = ARC_EXCESSIVE_RECONS; 290 291 /* start receiver */ 292 293 sc->sc_intmask |= BAH_RI; 294 sc->sc_rx_fillcount = 0; 295 sc->sc_rx_act = 2; 296 297 PUTREG(BAHCMD, BAH_RXBC(2)); 298 PUTREG(BAHSTAT, sc->sc_intmask); 299 300 #ifdef BAH_DEBUG 301 printf("%s: reset: started receiver, status=0x%02x\n", 302 device_xname(sc->sc_dev), GETREG(BAHSTAT)); 303 #endif 304 305 /* and init transmitter status */ 306 sc->sc_tx_act = 0; 307 sc->sc_tx_fillcount = 0; 308 309 ifp->if_flags |= IFF_RUNNING; 310 ifp->if_flags &= ~IFF_OACTIVE; 311 312 bah_start(ifp); 313 } 314 315 /* 316 * Take interface offline 317 */ 318 void 319 bah_stop(struct bah_softc *sc) 320 { 321 bus_space_tag_t bst_r = sc->sc_bst_r; 322 bus_space_handle_t regs = sc->sc_regs; 323 324 /* Stop the interrupts */ 325 PUTREG(BAHSTAT, 0); 326 327 /* Stop the interface */ 328 (*sc->sc_reset)(sc, 0); 329 330 /* Stop watchdog timer */ 331 sc->sc_arccom.ac_if.if_timer = 0; 332 } 333 334 /* 335 * Start output on interface. Get another datagram to send 336 * off the interface queue, and copy it to the 337 * interface before starting the output 338 * 339 * this assumes that it is called inside a critical section... 340 * XXX hm... does it still? 341 * 342 */ 343 void 344 bah_start(struct ifnet *ifp) 345 { 346 struct bah_softc *sc = ifp->if_softc; 347 struct mbuf *m,*mp; 348 349 bus_space_tag_t bst_r = sc->sc_bst_r; 350 bus_space_handle_t regs = sc->sc_regs; 351 bus_space_tag_t bst_m = sc->sc_bst_m; 352 bus_space_handle_t mem = sc->sc_mem; 353 354 int bah_ram_ptr; 355 int len, tlen, offset, s, buffer; 356 #ifdef BAHTIMINGS 357 u_long copystart, lencopy, perbyte; 358 #endif 359 360 #if defined(BAH_DEBUG) && (BAH_DEBUG > 3) 361 printf("%s: start(0x%x)\n", device_xname(sc->sc_dev), ifp); 362 #endif 363 364 if ((ifp->if_flags & IFF_RUNNING) == 0) 365 return; 366 367 s = splnet(); 368 369 if (sc->sc_tx_fillcount >= 2) { 370 splx(s); 371 return; 372 } 373 374 IFQ_DEQUEUE(&ifp->if_snd, m); 375 buffer = sc->sc_tx_act ^ 1; 376 377 splx(s); 378 379 if (m == 0) 380 return; 381 382 /* 383 * If bpf is listening on this interface, let it 384 * see the packet before we commit it to the wire 385 * 386 * (can't give the copy in A2060 card RAM to bpf, because 387 * that RAM is just accessed as on every other byte) 388 */ 389 bpf_mtap(ifp, m, BPF_D_OUT); 390 391 #ifdef BAH_DEBUG 392 if (m->m_len < ARC_HDRLEN) 393 m = m_pullup(m, ARC_HDRLEN);/* gcc does structure padding */ 394 printf("%s: start: filling %d from %u to %u type %u\n", 395 device_xname(sc->sc_dev), buffer, mtod(m, u_char *)[0], 396 mtod(m, u_char *)[1], mtod(m, u_char *)[2]); 397 #else 398 if (m->m_len < 2) 399 m = m_pullup(m, 2); 400 #endif 401 bah_ram_ptr = buffer*512; 402 403 if (m == 0) 404 return; 405 406 /* write the addresses to RAM and throw them away */ 407 408 /* 409 * Hardware does this: Yet Another Microsecond Saved. 410 * (btw, timing code says usually 2 microseconds) 411 * PUTMEM(bah_ram_ptr + 0, mtod(m, u_char *)[0]); 412 */ 413 414 PUTMEM(bah_ram_ptr + 1, mtod(m, u_char *)[1]); 415 m_adj(m, 2); 416 417 /* get total length left at this point */ 418 tlen = m->m_pkthdr.len; 419 if (tlen < ARC_MIN_FORBID_LEN) { 420 offset = 256 - tlen; 421 PUTMEM(bah_ram_ptr + 2, offset); 422 } else { 423 PUTMEM(bah_ram_ptr + 2, 0); 424 if (tlen <= ARC_MAX_FORBID_LEN) 425 offset = 255; /* !!! */ 426 else { 427 if (tlen > ARC_MAX_LEN) 428 tlen = ARC_MAX_LEN; 429 offset = 512 - tlen; 430 } 431 PUTMEM(bah_ram_ptr + 3, offset); 432 433 } 434 bah_ram_ptr += offset; 435 436 /* lets loop through the mbuf chain */ 437 438 for (mp = m; mp; mp = mp->m_next) { 439 if ((len = mp->m_len)) { /* YAMS */ 440 bus_space_write_region_1(bst_m, mem, bah_ram_ptr, 441 mtod(mp, void *), len); 442 443 bah_ram_ptr += len; 444 } 445 } 446 447 sc->sc_broadcast[buffer] = (m->m_flags & M_BCAST) != 0; 448 sc->sc_retransmits[buffer] = (m->m_flags & M_BCAST) ? 1 : 5; 449 450 /* actually transmit the packet */ 451 s = splnet(); 452 453 if (++sc->sc_tx_fillcount > 1) { 454 /* 455 * We are filled up to the rim. No more bufs for the moment, 456 * please. 457 */ 458 ifp->if_flags |= IFF_OACTIVE; 459 } else { 460 #ifdef BAH_DEBUG 461 printf("%s: start: starting transmitter on buffer %d\n", 462 device_xname(sc->sc_dev), buffer); 463 #endif 464 /* Transmitter was off, start it */ 465 sc->sc_tx_act = buffer; 466 467 /* 468 * We still can accept another buf, so don't: 469 * ifp->if_flags |= IFF_OACTIVE; 470 */ 471 sc->sc_intmask |= BAH_TA; 472 PUTREG(BAHCMD, BAH_TX(buffer)); 473 PUTREG(BAHSTAT, sc->sc_intmask); 474 475 sc->sc_arccom.ac_if.if_timer = ARCTIMEOUT; 476 } 477 splx(s); 478 m_freem(m); 479 480 /* 481 * After 10 times reading the docs, I realized 482 * that in the case the receiver NAKs the buffer request, 483 * the hardware retries till shutdown. 484 * This is integrated now in the code above. 485 */ 486 487 return; 488 } 489 490 /* 491 * Arcnet interface receiver soft interrupt: 492 * get the stuff out of any filled buffer we find. 493 */ 494 void 495 bah_srint(void *vsc) 496 { 497 struct bah_softc *sc = (struct bah_softc *)vsc; 498 int buffer, len, len1, amount, offset, s, type; 499 int bah_ram_ptr; 500 struct mbuf *m, *dst, *head; 501 struct arc_header *ah; 502 struct ifnet *ifp; 503 504 bus_space_tag_t bst_r = sc->sc_bst_r; 505 bus_space_tag_t bst_m = sc->sc_bst_m; 506 bus_space_handle_t regs = sc->sc_regs; 507 bus_space_handle_t mem = sc->sc_mem; 508 509 ifp = &sc->sc_arccom.ac_if; 510 head = 0; 511 512 s = splnet(); 513 buffer = sc->sc_rx_act ^ 1; 514 splx(s); 515 516 /* Allocate header mbuf */ 517 MGETHDR(m, M_DONTWAIT, MT_DATA); 518 519 if (m == 0) { 520 /* 521 * in case s.th. goes wrong with mem, drop it 522 * to make sure the receiver can be started again 523 * count it as input error (we dont have any other 524 * detectable) 525 */ 526 if_statinc(ifp, if_ierrors); 527 goto cleanup; 528 } 529 530 m_set_rcvif(m, ifp); 531 532 /* 533 * Align so that IP packet will be longword aligned. Here we 534 * assume that m_data of new packet is longword aligned. 535 * When implementing PHDS, we might have to change it to 2, 536 * (2*sizeof(ulong) - ARC_HDRNEWLEN)), packet type dependent. 537 */ 538 539 bah_ram_ptr = buffer*512; 540 offset = GETMEM(bah_ram_ptr + 2); 541 if (offset) 542 len = 256 - offset; 543 else { 544 offset = GETMEM(bah_ram_ptr + 3); 545 len = 512 - offset; 546 } 547 if (len+2 >= MINCLSIZE) 548 MCLGET(m, M_DONTWAIT); 549 550 if (m == 0) { 551 if_statinc(ifp, if_ierrors); 552 goto cleanup; 553 } 554 555 type = GETMEM(bah_ram_ptr + offset); 556 m->m_data += 1 + arc_isphds(type); 557 558 head = m; 559 ah = mtod(head, struct arc_header *); 560 561 ah->arc_shost = GETMEM(bah_ram_ptr + 0); 562 ah->arc_dhost = GETMEM(bah_ram_ptr + 1); 563 564 m->m_pkthdr.len = len+2; /* whole packet length */ 565 m->m_len = 2; /* mbuf filled with ARCnet addresses */ 566 bah_ram_ptr += offset; /* ram buffer continues there */ 567 568 while (len > 0) { 569 570 len1 = len; 571 amount = M_TRAILINGSPACE(m); 572 573 if (amount == 0) { 574 dst = m; 575 MGET(m, M_DONTWAIT, MT_DATA); 576 577 if (m == 0) { 578 if_statinc(ifp, if_ierrors); 579 goto cleanup; 580 } 581 582 if (len1 >= MINCLSIZE) 583 MCLGET(m, M_DONTWAIT); 584 585 m->m_len = 0; 586 dst->m_next = m; 587 amount = M_TRAILINGSPACE(m); 588 } 589 590 if (amount < len1) 591 len1 = amount; 592 593 bus_space_read_region_1(bst_m, mem, bah_ram_ptr, 594 mtod(m, u_char *) + m->m_len, len1); 595 596 m->m_len += len1; 597 bah_ram_ptr += len1; 598 len -= len1; 599 } 600 601 if_percpuq_enqueue((&sc->sc_arccom.ac_if)->if_percpuq, head); 602 603 head = NULL; 604 605 cleanup: 606 607 m_freem(head); 608 609 /* mark buffer as invalid by source id 0 */ 610 bus_space_write_1(bst_m, mem, buffer*512, 0); 611 s = splnet(); 612 613 if (--sc->sc_rx_fillcount == 2 - 1) { 614 615 /* was off, restart it on buffer just emptied */ 616 sc->sc_rx_act = buffer; 617 sc->sc_intmask |= BAH_RI; 618 619 /* this also clears the RI flag interrupt: */ 620 PUTREG(BAHCMD, BAH_RXBC(buffer)); 621 PUTREG(BAHSTAT, sc->sc_intmask); 622 623 #ifdef BAH_DEBUG 624 printf("%s: srint: restarted rx on buf %d\n", 625 device_xname(sc->sc_dev), buffer); 626 #endif 627 } 628 splx(s); 629 } 630 631 inline static void 632 bah_tint(struct bah_softc *sc, int isr) 633 { 634 struct ifnet *ifp; 635 636 bus_space_tag_t bst_r = sc->sc_bst_r; 637 bus_space_handle_t regs = sc->sc_regs; 638 639 640 int buffer; 641 #ifdef BAHTIMINGS 642 int clknow; 643 #endif 644 645 ifp = &(sc->sc_arccom.ac_if); 646 buffer = sc->sc_tx_act; 647 648 /* 649 * retransmit code: 650 * Normal situations first for fast path: 651 * If acknowledgement received ok or broadcast, we're ok. 652 * else if 653 */ 654 655 if (isr & BAH_TMA || sc->sc_broadcast[buffer]) 656 if_statinc(ifp, if_opackets); 657 #ifdef BAHRETRANSMIT 658 else if (ifp->if_flags & IFF_LINK2 && ifp->if_timer > 0 659 && --sc->sc_retransmits[buffer] > 0) { 660 /* retransmit same buffer */ 661 PUTREG(BAHCMD, BAH_TX(buffer)); 662 return; 663 } 664 #endif 665 else 666 if_statinc(ifp, if_oerrors); 667 668 669 /* We know we can accept another buffer at this point. */ 670 ifp->if_flags &= ~IFF_OACTIVE; 671 672 if (--sc->sc_tx_fillcount > 0) { 673 674 /* 675 * start tx on other buffer. 676 * This also clears the int flag 677 */ 678 buffer ^= 1; 679 sc->sc_tx_act = buffer; 680 681 /* 682 * already given: 683 * sc->sc_intmask |= BAH_TA; 684 * PUTREG(BAHSTAT, sc->sc_intmask); 685 */ 686 PUTREG(BAHCMD, BAH_TX(buffer)); 687 /* init watchdog timer */ 688 ifp->if_timer = ARCTIMEOUT; 689 690 #if defined(BAH_DEBUG) && (BAH_DEBUG > 1) 691 printf("%s: tint: starting tx on buffer %d, status 0x%02x\n", 692 device_xname(sc->sc_dev), buffer, GETREG(BAHSTAT)); 693 #endif 694 } else { 695 /* have to disable TX interrupt */ 696 sc->sc_intmask &= ~BAH_TA; 697 PUTREG(BAHSTAT, sc->sc_intmask); 698 /* ... and watchdog timer */ 699 ifp->if_timer = 0; 700 701 #ifdef BAH_DEBUG 702 printf("%s: tint: no more buffers to send, status 0x%02x\n", 703 device_xname(sc->sc_dev), GETREG(BAHSTAT)); 704 #endif 705 } 706 707 /* XXXX TODO */ 708 #ifdef BAHSOFTCOPY 709 /* schedule soft int to fill a new buffer for us */ 710 softint_schedule(sc->sc_txcookie); 711 #else 712 if_schedule_deferred_start(ifp); 713 #endif 714 } 715 716 /* 717 * Our interrupt routine 718 */ 719 int 720 bahintr(void *arg) 721 { 722 struct bah_softc *sc = arg; 723 724 bus_space_tag_t bst_r = sc->sc_bst_r; 725 bus_space_tag_t bst_m = sc->sc_bst_m; 726 bus_space_handle_t regs = sc->sc_regs; 727 bus_space_handle_t mem = sc->sc_mem; 728 729 u_char isr, maskedisr; 730 int buffer; 731 u_long newsec; 732 733 isr = GETREG(BAHSTAT); 734 maskedisr = isr & sc->sc_intmask; 735 if (!maskedisr) 736 return (0); 737 do { 738 739 #if defined(BAH_DEBUG) && (BAH_DEBUG>1) 740 printf("%s: intr: status 0x%02x, intmask 0x%02x\n", 741 device_xname(sc->sc_dev), isr, sc->sc_intmask); 742 #endif 743 744 if (maskedisr & BAH_POR) { 745 /* 746 * XXX We should never see this. Don't bother to store 747 * the address. 748 * sc->sc_arccom.ac_anaddr = GETMEM(BAHMACOFF); 749 */ 750 PUTREG(BAHCMD, BAH_CLR(CLR_POR)); 751 log(LOG_WARNING, 752 "%s: intr: got spurious power on reset int\n", 753 device_xname(sc->sc_dev)); 754 } 755 756 if (maskedisr & BAH_RECON) { 757 /* 758 * we dont need to: 759 * PUTREG(BAHCMD, BAH_CONF(CONF_LONG)); 760 */ 761 PUTREG(BAHCMD, BAH_CLR(CLR_RECONFIG)); 762 if_statinc(&sc->sc_arccom.ac_if, if_collisions); 763 764 /* 765 * If less than 2 seconds per reconfig: 766 * If ARC_EXCESSIVE_RECONFIGS 767 * since last burst, complain and set threshold for 768 * warnings to ARC_EXCESSIVE_RECONS_REWARN. 769 * 770 * This allows for, e.g., new stations on the cable, or 771 * cable switching as long as it is over after 772 * (normally) 16 seconds. 773 * 774 * XXX TODO: check timeout bits in status word and 775 * double time if necessary. 776 */ 777 778 callout_stop(&sc->sc_recon_ch); 779 newsec = time_second; 780 if ((newsec - sc->sc_recontime <= 2) && 781 (++sc->sc_reconcount == ARC_EXCESSIVE_RECONS)) { 782 log(LOG_WARNING, 783 "%s: excessive token losses, " 784 "cable problem?\n", device_xname(sc->sc_dev)); 785 } 786 sc->sc_recontime = newsec; 787 callout_reset(&sc->sc_recon_ch, 15 * hz, 788 bah_reconwatch, (void *)sc); 789 } 790 791 if (maskedisr & BAH_RI) { 792 #if defined(BAH_DEBUG) && (BAH_DEBUG > 1) 793 printf("%s: intr: hard rint, act %d\n", 794 device_xname(sc->sc_dev), sc->sc_rx_act); 795 #endif 796 797 buffer = sc->sc_rx_act; 798 /* look if buffer is marked invalid: */ 799 if (GETMEM(buffer*512) == 0) { 800 /* 801 * invalid marked buffer (or illegally 802 * configured sender) 803 */ 804 log(LOG_WARNING, 805 "%s: spurious RX interrupt or sender 0 " 806 " (ignored)\n", device_xname(sc->sc_dev)); 807 /* 808 * restart receiver on same buffer. 809 * XXX maybe better reset interface? 810 */ 811 PUTREG(BAHCMD, BAH_RXBC(buffer)); 812 } else { 813 if (++sc->sc_rx_fillcount > 1) { 814 sc->sc_intmask &= ~BAH_RI; 815 PUTREG(BAHSTAT, sc->sc_intmask); 816 } else { 817 buffer ^= 1; 818 sc->sc_rx_act = buffer; 819 820 /* 821 * Start receiver on other receive 822 * buffer. This also clears the RI 823 * interrupt flag. 824 */ 825 PUTREG(BAHCMD, BAH_RXBC(buffer)); 826 /* in RX intr, so mask is ok for RX */ 827 828 #ifdef BAH_DEBUG 829 printf("%s: strt rx for buf %u, " 830 "stat 0x%02x\n", 831 device_xname(sc->sc_dev), sc->sc_rx_act, 832 GETREG(BAHSTAT)); 833 #endif 834 } 835 836 #ifdef BAHSOFTCOPY 837 /* 838 * this one starts a soft int to copy out 839 * of the hw 840 */ 841 softint_schedule(sc->sc_rxcookie); 842 #else 843 /* this one does the copy here */ 844 bah_srint(sc); 845 #endif 846 } 847 } 848 if (maskedisr & BAH_TA) { 849 bah_tint(sc, isr); 850 } 851 isr = GETREG(BAHSTAT); 852 maskedisr = isr & sc->sc_intmask; 853 } while (maskedisr); 854 855 return (1); 856 } 857 858 void 859 bah_reconwatch(void *arg) 860 { 861 struct bah_softc *sc = arg; 862 863 if (sc->sc_reconcount >= ARC_EXCESSIVE_RECONS) { 864 sc->sc_reconcount = 0; 865 log(LOG_WARNING, "%s: token valid again.\n", 866 device_xname(sc->sc_dev)); 867 } 868 sc->sc_reconcount = 0; 869 } 870 871 872 /* 873 * Process an ioctl request. 874 * This code needs some work - it looks pretty ugly. 875 */ 876 int 877 bah_ioctl(struct ifnet *ifp, u_long cmd, void *data) 878 { 879 struct bah_softc *sc; 880 struct ifaddr *ifa; 881 struct ifreq *ifr; 882 int s, error; 883 884 error = 0; 885 sc = ifp->if_softc; 886 ifa = (struct ifaddr *)data; 887 ifr = (struct ifreq *)data; 888 s = splnet(); 889 890 #if defined(BAH_DEBUG) && (BAH_DEBUG > 2) 891 printf("%s: ioctl() called, cmd = 0x%lx\n", 892 device_xname(sc->sc_dev), cmd); 893 #endif 894 895 switch (cmd) { 896 case SIOCINITIFADDR: 897 ifp->if_flags |= IFF_UP; 898 bah_init(sc); 899 switch (ifa->ifa_addr->sa_family) { 900 #ifdef INET 901 case AF_INET: 902 arp_ifinit(ifp, ifa); 903 break; 904 #endif 905 default: 906 break; 907 } 908 909 case SIOCSIFFLAGS: 910 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 911 break; 912 /* XXX re-use ether_ioctl() */ 913 switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { 914 case IFF_RUNNING: 915 /* 916 * If interface is marked down and it is running, 917 * then stop it. 918 */ 919 bah_stop(sc); 920 ifp->if_flags &= ~IFF_RUNNING; 921 break; 922 case IFF_UP: 923 /* 924 * If interface is marked up and it is stopped, then 925 * start it. 926 */ 927 bah_init(sc); 928 break; 929 } 930 break; 931 932 case SIOCADDMULTI: 933 case SIOCDELMULTI: 934 switch (ifreq_getaddr(cmd, ifr)->sa_family) { 935 case AF_INET: 936 case AF_INET6: 937 error = 0; 938 break; 939 default: 940 error = EAFNOSUPPORT; 941 break; 942 } 943 break; 944 945 default: 946 error = ether_ioctl(ifp, cmd, data); 947 } 948 949 splx(s); 950 return (error); 951 } 952 953 /* 954 * watchdog routine for transmitter. 955 * 956 * We need this, because else a receiver whose hardware is alive, but whose 957 * software has not enabled the Receiver, would make our hardware wait forever 958 * Discovered this after 20 times reading the docs. 959 * 960 * Only thing we do is disable transmitter. We'll get a transmit timeout, 961 * and the int handler will have to decide not to retransmit (in case 962 * retransmission is implemented). 963 * 964 * This one assumes being called inside splnet() 965 */ 966 967 void 968 bah_watchdog(struct ifnet *ifp) 969 { 970 struct bah_softc *sc = ifp->if_softc; 971 972 bus_space_tag_t bst_r = sc->sc_bst_r; 973 bus_space_handle_t regs = sc->sc_regs; 974 975 PUTREG(BAHCMD, BAH_TXDIS); 976 return; 977 } 978 979
Indexes created Sun Sep 21 20:09:37 GMT 2025