1 /* $OpenBSD: dp8390.c,v 1.46 2013/11/26 09:50:33 mpi Exp $ */ 2 /* $NetBSD: dp8390.c,v 1.13 1998/07/05 06:49:11 jonathan Exp $ */ 3 4 /* 5 * Device driver for National Semiconductor DS8390/WD83C690 based ethernet 6 * adapters. 7 * 8 * Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved. 9 * 10 * Copyright (C) 1993, David Greenman. This software may be used, modified, 11 * copied, distributed, and sold, in both source and binary form provided that 12 * the above copyright and these terms are retained. Under no circumstances is 13 * the author responsible for the proper functioning of this software, nor does 14 * the author assume any responsibility for damages incurred with its use. 15 */ 16 17 #include "bpfilter.h" 18 19 #include <sys/param.h> 20 #include <sys/systm.h> 21 #include <sys/device.h> 22 #include <sys/errno.h> 23 #include <sys/ioctl.h> 24 #include <sys/mbuf.h> 25 #include <sys/socket.h> 26 #include <sys/syslog.h> 27 28 #include <net/if.h> 29 #include <net/if_dl.h> 30 #include <net/if_types.h> 31 #include <net/if_media.h> 32 33 #ifdef INET 34 #include <netinet/in.h> 35 #include <netinet/in_systm.h> 36 #include <netinet/ip.h> 37 #include <netinet/if_ether.h> 38 #endif 39 40 #if NBPFILTER > 0 41 #include <net/bpf.h> 42 #endif 43 44 #include <machine/bus.h> 45 46 #include <dev/ic/dp8390reg.h> 47 #include <dev/ic/dp8390var.h> 48 49 #ifdef DEBUG 50 #define __inline__ /* XXX for debugging porpoises */ 51 #endif 52 53 static __inline__ void dp8390_xmit(struct dp8390_softc *); 54 55 static __inline__ void dp8390_read_hdr(struct dp8390_softc *, 56 int, struct dp8390_ring *); 57 static __inline__ int dp8390_ring_copy(struct dp8390_softc *, 58 int, caddr_t, u_short); 59 static __inline__ int dp8390_write_mbuf(struct dp8390_softc *, 60 struct mbuf *, int); 61 62 static int dp8390_test_mem(struct dp8390_softc *); 63 64 #ifdef DEBUG 65 int dp8390_debug = 0; 66 #endif 67 68 /* 69 * Standard media init routine for the dp8390. 70 */ 71 void 72 dp8390_media_init(struct dp8390_softc *sc) 73 { 74 ifmedia_init(&sc->sc_media, 0, dp8390_mediachange, dp8390_mediastatus); 75 ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); 76 ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); 77 } 78 79 /* 80 * Do bus-independent setup. 81 */ 82 int 83 dp8390_config(struct dp8390_softc *sc) 84 { 85 struct ifnet *ifp = &sc->sc_arpcom.ac_if; 86 int rv; 87 88 rv = 1; 89 90 if (!sc->test_mem) 91 sc->test_mem = dp8390_test_mem; 92 93 /* Allocate one xmit buffer if < 16k, two buffers otherwise. */ 94 if ((sc->mem_size < 16384) || 95 (sc->sc_flags & DP8390_NO_MULTI_BUFFERING)) 96 sc->txb_cnt = 1; 97 else if (sc->mem_size < 8192 * 3) 98 sc->txb_cnt = 2; 99 else 100 sc->txb_cnt = 3; 101 102 sc->tx_page_start = sc->mem_start >> ED_PAGE_SHIFT; 103 sc->rec_page_start = sc->tx_page_start + sc->txb_cnt * ED_TXBUF_SIZE; 104 sc->rec_page_stop = sc->tx_page_start + (sc->mem_size >> ED_PAGE_SHIFT); 105 sc->mem_ring = sc->mem_start + 106 ((sc->txb_cnt * ED_TXBUF_SIZE) << ED_PAGE_SHIFT); 107 sc->mem_end = sc->mem_start + sc->mem_size; 108 109 /* Now zero memory and verify that it is clear. */ 110 if ((*sc->test_mem)(sc)) 111 goto out; 112 113 /* Set interface to stopped condition (reset). */ 114 dp8390_stop(sc); 115 116 /* Initialize ifnet structure. */ 117 bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ); 118 ifp->if_softc = sc; 119 ifp->if_start = dp8390_start; 120 ifp->if_ioctl = dp8390_ioctl; 121 if (!ifp->if_watchdog) 122 ifp->if_watchdog = dp8390_watchdog; 123 ifp->if_flags = 124 IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; 125 IFQ_SET_READY(&ifp->if_snd); 126 127 ifp->if_capabilities = IFCAP_VLAN_MTU; 128 129 /* Print additional info when attached. */ 130 printf(", address %s\n", ether_sprintf(sc->sc_arpcom.ac_enaddr)); 131 132 /* Initialize media goo. */ 133 (*sc->sc_media_init)(sc); 134 135 /* Attach the interface. */ 136 if_attach(ifp); 137 ether_ifattach(ifp); 138 139 rv = 0; 140 out: 141 return (rv); 142 } 143 144 /* 145 * Media change callback. 146 */ 147 int 148 dp8390_mediachange(struct ifnet *ifp) 149 { 150 struct dp8390_softc *sc = ifp->if_softc; 151 152 if (sc->sc_mediachange) 153 return ((*sc->sc_mediachange)(sc)); 154 155 return (0); 156 } 157 158 /* 159 * Media status callback. 160 */ 161 void 162 dp8390_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) 163 { 164 struct dp8390_softc *sc = ifp->if_softc; 165 166 if (sc->sc_enabled == 0) { 167 ifmr->ifm_active = IFM_ETHER | IFM_NONE; 168 ifmr->ifm_status = 0; 169 return; 170 } 171 172 if (sc->sc_mediastatus) 173 (*sc->sc_mediastatus)(sc, ifmr); 174 } 175 176 /* 177 * Reset interface. 178 */ 179 void 180 dp8390_reset(struct dp8390_softc *sc) 181 { 182 int s; 183 184 s = splnet(); 185 dp8390_stop(sc); 186 dp8390_init(sc); 187 splx(s); 188 } 189 190 /* 191 * Take interface offline. 192 */ 193 void 194 dp8390_stop(struct dp8390_softc *sc) 195 { 196 bus_space_tag_t regt = sc->sc_regt; 197 bus_space_handle_t regh = sc->sc_regh; 198 int n = 5000; 199 200 /* Stop everything on the interface, and select page 0 registers. */ 201 NIC_BARRIER(regt, regh); 202 NIC_PUT(regt, regh, ED_P0_CR, 203 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STP); 204 NIC_BARRIER(regt, regh); 205 206 /* 207 * Wait for interface to enter stopped state, but limit # of checks to 208 * 'n' (about 5ms). It shouldn't even take 5us on modern DS8390's, but 209 * just in case it's an old one. 210 */ 211 while (((NIC_GET(regt, regh, 212 ED_P0_ISR) & ED_ISR_RST) == 0) && --n) 213 DELAY(1); 214 215 if (sc->stop_card != NULL) 216 (*sc->stop_card)(sc); 217 } 218 219 /* 220 * Device timeout/watchdog routine. Entered if the device neglects to generate 221 * an interrupt after a transmit has been started on it. 222 */ 223 224 void 225 dp8390_watchdog(struct ifnet *ifp) 226 { 227 struct dp8390_softc *sc = ifp->if_softc; 228 229 log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname); 230 ++sc->sc_arpcom.ac_if.if_oerrors; 231 232 dp8390_reset(sc); 233 } 234 235 /* 236 * Initialize device. 237 */ 238 void 239 dp8390_init(struct dp8390_softc *sc) 240 { 241 bus_space_tag_t regt = sc->sc_regt; 242 bus_space_handle_t regh = sc->sc_regh; 243 struct ifnet *ifp = &sc->sc_arpcom.ac_if; 244 u_int8_t mcaf[8]; 245 int i; 246 247 /* 248 * Initialize the NIC in the exact order outlined in the NS manual. 249 * This init procedure is "mandatory"...don't change what or when 250 * things happen. 251 */ 252 253 /* Reset transmitter flags. */ 254 ifp->if_timer = 0; 255 256 sc->txb_inuse = 0; 257 sc->txb_new = 0; 258 sc->txb_next_tx = 0; 259 260 /* Set interface for page 0, remote DMA complete, stopped. */ 261 NIC_BARRIER(regt, regh); 262 NIC_PUT(regt, regh, ED_P0_CR, 263 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STP); 264 NIC_BARRIER(regt, regh); 265 266 if (sc->dcr_reg & ED_DCR_LS) { 267 NIC_PUT(regt, regh, ED_P0_DCR, sc->dcr_reg); 268 } else { 269 /* 270 * Set FIFO threshold to 8, No auto-init Remote DMA, byte 271 * order=80x86, byte-wide DMA xfers, 272 */ 273 NIC_PUT(regt, regh, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS); 274 } 275 276 /* Clear remote byte count registers. */ 277 NIC_PUT(regt, regh, ED_P0_RBCR0, 0); 278 NIC_PUT(regt, regh, ED_P0_RBCR1, 0); 279 280 /* Tell RCR to do nothing for now. */ 281 NIC_PUT(regt, regh, ED_P0_RCR, ED_RCR_MON | sc->rcr_proto); 282 283 /* Place NIC in internal loopback mode. */ 284 NIC_PUT(regt, regh, ED_P0_TCR, ED_TCR_LB0); 285 286 /* Set lower bits of byte addressable framing to 0. */ 287 if (sc->is790) 288 NIC_PUT(regt, regh, 0x09, 0); 289 290 /* Initialize receive buffer ring. */ 291 NIC_PUT(regt, regh, ED_P0_BNRY, sc->rec_page_start); 292 NIC_PUT(regt, regh, ED_P0_PSTART, sc->rec_page_start); 293 NIC_PUT(regt, regh, ED_P0_PSTOP, sc->rec_page_stop); 294 295 /* 296 * Enable the following interrupts: receive/transmit complete, 297 * receive/transmit error, and Receiver OverWrite. 298 * 299 * Counter overflow and Remote DMA complete are *not* enabled. 300 */ 301 NIC_PUT(regt, regh, ED_P0_IMR, 302 ED_IMR_PRXE | ED_IMR_PTXE | ED_IMR_RXEE | ED_IMR_TXEE | 303 ED_IMR_OVWE); 304 305 /* 306 * Clear all interrupts. A '1' in each bit position clears the 307 * corresponding flag. 308 */ 309 NIC_PUT(regt, regh, ED_P0_ISR, 0xff); 310 311 /* Program command register for page 1. */ 312 NIC_BARRIER(regt, regh); 313 NIC_PUT(regt, regh, ED_P0_CR, 314 sc->cr_proto | ED_CR_PAGE_1 | ED_CR_STP); 315 NIC_BARRIER(regt, regh); 316 317 /* Copy out our station address. */ 318 for (i = 0; i < ETHER_ADDR_LEN; ++i) 319 NIC_PUT(regt, regh, ED_P1_PAR0 + i, 320 sc->sc_arpcom.ac_enaddr[i]); 321 322 /* Set multicast filter on chip. */ 323 dp8390_getmcaf(&sc->sc_arpcom, mcaf); 324 for (i = 0; i < 8; i++) 325 NIC_PUT(regt, regh, ED_P1_MAR0 + i, mcaf[i]); 326 327 /* 328 * Set current page pointer to one page after the boundary pointer, as 329 * recommended in the National manual. 330 */ 331 sc->next_packet = sc->rec_page_start + 1; 332 NIC_PUT(regt, regh, ED_P1_CURR, sc->next_packet); 333 334 /* Program command register for page 0. */ 335 NIC_BARRIER(regt, regh); 336 NIC_PUT(regt, regh, ED_P1_CR, 337 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STP); 338 NIC_BARRIER(regt, regh); 339 340 /* Accept broadcast and multicast packets by default. */ 341 i = ED_RCR_AB | ED_RCR_AM | sc->rcr_proto; 342 if (ifp->if_flags & IFF_PROMISC) { 343 /* 344 * Set promiscuous mode. Multicast filter was set earlier so 345 * that we should receive all multicast packets. 346 */ 347 i |= ED_RCR_PRO | ED_RCR_AR | ED_RCR_SEP; 348 } 349 NIC_PUT(regt, regh, ED_P0_RCR, i); 350 351 /* Take interface out of loopback. */ 352 NIC_PUT(regt, regh, ED_P0_TCR, 0); 353 354 /* Do any card-specific initialization, if applicable. */ 355 if (sc->init_card) 356 (*sc->init_card)(sc); 357 358 /* Fire up the interface. */ 359 NIC_BARRIER(regt, regh); 360 NIC_PUT(regt, regh, ED_P0_CR, 361 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); 362 363 /* Set 'running' flag, and clear output active flag. */ 364 ifp->if_flags |= IFF_RUNNING; 365 ifp->if_flags &= ~IFF_OACTIVE; 366 367 /* ...and attempt to start output. */ 368 dp8390_start(ifp); 369 } 370 371 /* 372 * This routine actually starts the transmission on the interface. 373 */ 374 static __inline__ void 375 dp8390_xmit(struct dp8390_softc *sc) 376 { 377 bus_space_tag_t regt = sc->sc_regt; 378 bus_space_handle_t regh = sc->sc_regh; 379 struct ifnet *ifp = &sc->sc_arpcom.ac_if; 380 u_short len; 381 382 #ifdef DIAGNOSTIC 383 if ((sc->txb_next_tx + sc->txb_inuse) % sc->txb_cnt != sc->txb_new) 384 panic("dp8390_xmit: desync, next_tx=%d inuse=%d cnt=%d new=%d", 385 sc->txb_next_tx, sc->txb_inuse, sc->txb_cnt, sc->txb_new); 386 387 if (sc->txb_inuse == 0) 388 panic("dp8390_xmit: no packets to xmit"); 389 #endif 390 391 len = sc->txb_len[sc->txb_next_tx]; 392 393 /* Set NIC for page 0 register access. */ 394 NIC_BARRIER(regt, regh); 395 NIC_PUT(regt, regh, ED_P0_CR, 396 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); 397 NIC_BARRIER(regt, regh); 398 399 /* Set TX buffer start page. */ 400 NIC_PUT(regt, regh, ED_P0_TPSR, sc->tx_page_start + 401 sc->txb_next_tx * ED_TXBUF_SIZE); 402 403 /* Set TX length. */ 404 NIC_PUT(regt, regh, ED_P0_TBCR0, len); 405 NIC_PUT(regt, regh, ED_P0_TBCR1, len >> 8); 406 407 /* Set page 0, remote DMA complete, transmit packet, and *start*. */ 408 NIC_BARRIER(regt, regh); 409 NIC_PUT(regt, regh, ED_P0_CR, 410 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_TXP | ED_CR_STA); 411 412 /* Point to next transmit buffer slot and wrap if necessary. */ 413 if (++sc->txb_next_tx == sc->txb_cnt) 414 sc->txb_next_tx = 0; 415 416 /* Set a timer just in case we never hear from the board again. */ 417 ifp->if_timer = 2; 418 } 419 420 /* 421 * Start output on interface. 422 * We make two assumptions here: 423 * 1) that the current priority is set to splnet _before_ this code 424 * is called *and* is returned to the appropriate priority after 425 * return 426 * 2) that the IFF_OACTIVE flag is checked before this code is called 427 * (i.e. that the output part of the interface is idle) 428 */ 429 void 430 dp8390_start(struct ifnet *ifp) 431 { 432 struct dp8390_softc *sc = ifp->if_softc; 433 struct mbuf *m0; 434 int buffer; 435 int len; 436 437 if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) 438 return; 439 440 outloop: 441 /* See if there is room to put another packet in the buffer. */ 442 if (sc->txb_inuse == sc->txb_cnt) { 443 /* No room. Indicate this to the outside world and exit. */ 444 ifp->if_flags |= IFF_OACTIVE; 445 return; 446 } 447 IFQ_DEQUEUE(&ifp->if_snd, m0); 448 if (m0 == 0) 449 return; 450 451 /* We need to use m->m_pkthdr.len, so require the header */ 452 if ((m0->m_flags & M_PKTHDR) == 0) 453 panic("dp8390_start: no header mbuf"); 454 455 #if NBPFILTER > 0 456 /* Tap off here if there is a BPF listener. */ 457 if (ifp->if_bpf) 458 bpf_mtap(ifp->if_bpf, m0, BPF_DIRECTION_OUT); 459 #endif 460 461 /* txb_new points to next open buffer slot. */ 462 buffer = sc->mem_start + 463 ((sc->txb_new * ED_TXBUF_SIZE) << ED_PAGE_SHIFT); 464 465 if (sc->write_mbuf) 466 len = (*sc->write_mbuf)(sc, m0, buffer); 467 else 468 len = dp8390_write_mbuf(sc, m0, buffer); 469 470 m_freem(m0); 471 sc->txb_len[sc->txb_new] = max(len, ETHER_MIN_LEN - ETHER_CRC_LEN); 472 473 /* Point to next buffer slot and wrap if necessary. */ 474 if (++sc->txb_new == sc->txb_cnt) 475 sc->txb_new = 0; 476 477 /* Start the first packet transmitting. */ 478 if (sc->txb_inuse++ == 0) 479 dp8390_xmit(sc); 480 481 /* Loop back to the top to possibly buffer more packets. */ 482 goto outloop; 483 } 484 485 /* 486 * Ethernet interface receiver interrupt. 487 */ 488 void 489 dp8390_rint(struct dp8390_softc *sc) 490 { 491 bus_space_tag_t regt = sc->sc_regt; 492 bus_space_handle_t regh = sc->sc_regh; 493 struct dp8390_ring packet_hdr; 494 int packet_ptr; 495 u_short len; 496 u_char boundary, current; 497 u_char nlen; 498 499 loop: 500 /* Set NIC to page 1 registers to get 'current' pointer. */ 501 NIC_BARRIER(regt, regh); 502 NIC_PUT(regt, regh, ED_P0_CR, 503 sc->cr_proto | ED_CR_PAGE_1 | ED_CR_STA); 504 NIC_BARRIER(regt, regh); 505 506 /* 507 * 'sc->next_packet' is the logical beginning of the ring-buffer - i.e. 508 * it points to where new data has been buffered. The 'CURR' (current) 509 * register points to the logical end of the ring-buffer - i.e. it 510 * points to where additional new data will be added. We loop here 511 * until the logical beginning equals the logical end (or in other 512 * words, until the ring-buffer is empty). 513 */ 514 current = NIC_GET(regt, regh, ED_P1_CURR); 515 if (sc->next_packet == current) 516 return; 517 518 /* Set NIC to page 0 registers to update boundary register. */ 519 NIC_BARRIER(regt, regh); 520 NIC_PUT(regt, regh, ED_P1_CR, 521 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); 522 NIC_BARRIER(regt, regh); 523 524 do { 525 /* Get pointer to this buffer's header structure. */ 526 packet_ptr = sc->mem_ring + 527 ((sc->next_packet - sc->rec_page_start) << ED_PAGE_SHIFT); 528 529 if (sc->read_hdr) 530 (*sc->read_hdr)(sc, packet_ptr, &packet_hdr); 531 else 532 dp8390_read_hdr(sc, packet_ptr, &packet_hdr); 533 len = packet_hdr.count; 534 535 /* 536 * Try do deal with old, buggy chips that sometimes duplicate 537 * the low byte of the length into the high byte. We do this 538 * by simply ignoring the high byte of the length and always 539 * recalculating it. 540 * 541 * NOTE: sc->next_packet is pointing at the current packet. 542 */ 543 if (packet_hdr.next_packet >= sc->next_packet) 544 nlen = (packet_hdr.next_packet - sc->next_packet); 545 else 546 nlen = ((packet_hdr.next_packet - sc->rec_page_start) + 547 (sc->rec_page_stop - sc->next_packet)); 548 --nlen; 549 if ((len & ED_PAGE_MASK) + sizeof(packet_hdr) > ED_PAGE_SIZE) 550 --nlen; 551 len = (len & ED_PAGE_MASK) | (nlen << ED_PAGE_SHIFT); 552 #ifdef DIAGNOSTIC 553 if (len != packet_hdr.count) { 554 printf("%s: length does not match " 555 "next packet pointer\n", sc->sc_dev.dv_xname); 556 printf("%s: len %04x nlen %04x start %02x " 557 "first %02x curr %02x next %02x stop %02x\n", 558 sc->sc_dev.dv_xname, packet_hdr.count, len, 559 sc->rec_page_start, sc->next_packet, current, 560 packet_hdr.next_packet, sc->rec_page_stop); 561 } 562 #endif 563 564 /* 565 * Be fairly liberal about what we allow as a "reasonable" 566 * length so that a [crufty] packet will make it to BPF (and 567 * can thus be analyzed). Note that all that is really 568 * important is that we have a length that will fit into one 569 * mbuf cluster or less; the upper layer protocols can then 570 * figure out the length from their own length field(s). 571 */ 572 if (len <= MCLBYTES && 573 packet_hdr.next_packet >= sc->rec_page_start && 574 packet_hdr.next_packet < sc->rec_page_stop) { 575 /* Go get packet. */ 576 dp8390_read(sc, 577 packet_ptr + sizeof(struct dp8390_ring), 578 len - sizeof(struct dp8390_ring)); 579 } else { 580 /* Really BAD. The ring pointers are corrupted. */ 581 log(LOG_ERR, "%s: NIC memory corrupt - " 582 "invalid packet length %d\n", 583 sc->sc_dev.dv_xname, len); 584 ++sc->sc_arpcom.ac_if.if_ierrors; 585 dp8390_reset(sc); 586 return; 587 } 588 589 /* Update next packet pointer. */ 590 sc->next_packet = packet_hdr.next_packet; 591 592 /* 593 * Update NIC boundary pointer - being careful to keep it one 594 * buffer behind (as recommended by NS databook). 595 */ 596 boundary = sc->next_packet - 1; 597 if (boundary < sc->rec_page_start) 598 boundary = sc->rec_page_stop - 1; 599 NIC_PUT(regt, regh, ED_P0_BNRY, boundary); 600 } while (sc->next_packet != current); 601 602 goto loop; 603 } 604 605 /* Ethernet interface interrupt processor. */ 606 int 607 dp8390_intr(void *arg) 608 { 609 struct dp8390_softc *sc = (struct dp8390_softc *)arg; 610 bus_space_tag_t regt = sc->sc_regt; 611 bus_space_handle_t regh = sc->sc_regh; 612 struct ifnet *ifp = &sc->sc_arpcom.ac_if; 613 u_char isr; 614 615 if (sc->sc_enabled == 0) 616 return (0); 617 618 /* Set NIC to page 0 registers. */ 619 NIC_BARRIER(regt, regh); 620 NIC_PUT(regt, regh, ED_P0_CR, 621 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); 622 NIC_BARRIER(regt, regh); 623 624 isr = NIC_GET(regt, regh, ED_P0_ISR); 625 if (!isr) 626 return (0); 627 628 /* Loop until there are no more new interrupts. */ 629 for (;;) { 630 /* 631 * Reset all the bits that we are 'acknowledging' by writing a 632 * '1' to each bit position that was set. 633 * (Writing a '1' *clears* the bit.) 634 */ 635 NIC_PUT(regt, regh, ED_P0_ISR, isr); 636 637 /* Work around for AX88190 bug */ 638 if ((sc->sc_flags & DP8390_DO_AX88190_WORKAROUND) != 0) 639 while ((NIC_GET(regt, regh, ED_P0_ISR) & isr) != 0) { 640 NIC_PUT(regt, regh, ED_P0_ISR, 0); 641 NIC_PUT(regt, regh, ED_P0_ISR, isr); 642 } 643 644 /* 645 * Handle transmitter interrupts. Handle these first because 646 * the receiver will reset the board under some conditions. 647 * 648 * If the chip was reset while a packet was transmitting, it 649 * may still deliver a TX interrupt. In this case, just ignore 650 * the interrupt. 651 */ 652 if (isr & (ED_ISR_PTX | ED_ISR_TXE) && 653 sc->txb_inuse != 0) { 654 u_char collisions = 655 NIC_GET(regt, regh, ED_P0_NCR) & 0x0f; 656 657 /* 658 * Check for transmit error. If a TX completed with an 659 * error, we end up throwing the packet away. Really 660 * the only error that is possible is excessive 661 * collisions, and in this case it is best to allow the 662 * automatic mechanisms of TCP to backoff the flow. Of 663 * course, with UDP we're screwed, but this is expected 664 * when a network is heavily loaded. 665 */ 666 if (isr & ED_ISR_TXE) { 667 /* 668 * Excessive collisions (16). 669 */ 670 if ((NIC_GET(regt, regh, ED_P0_TSR) 671 & ED_TSR_ABT) && (collisions == 0)) { 672 /* 673 * When collisions total 16, the P0_NCR 674 * will indicate 0, and the TSR_ABT is 675 * set. 676 */ 677 collisions = 16; 678 } 679 680 /* Update output errors counter. */ 681 ++ifp->if_oerrors; 682 } else { 683 /* 684 * Throw away the non-error status bits. 685 * 686 * XXX 687 * It may be useful to detect loss of carrier 688 * and late collisions here. 689 */ 690 (void)NIC_GET(regt, regh, ED_P0_TSR); 691 692 /* 693 * Update total number of successfully 694 * transmitted packets. 695 */ 696 ++ifp->if_opackets; 697 } 698 699 /* Clear watchdog timer. */ 700 ifp->if_timer = 0; 701 ifp->if_flags &= ~IFF_OACTIVE; 702 703 /* 704 * Add in total number of collisions on last 705 * transmission. 706 */ 707 ifp->if_collisions += collisions; 708 709 /* 710 * Decrement buffer in-use count if not zero (can only 711 * be zero if a transmitter interrupt occurred while not 712 * actually transmitting). 713 * If data is ready to transmit, start it transmitting, 714 * otherwise defer until after handling receiver. 715 */ 716 if (--sc->txb_inuse != 0) 717 dp8390_xmit(sc); 718 } 719 720 /* Handle receiver interrupts. */ 721 if (isr & (ED_ISR_PRX | ED_ISR_RXE | ED_ISR_OVW)) { 722 /* 723 * Overwrite warning. In order to make sure that a 724 * lockup of the local DMA hasn't occurred, we reset 725 * and re-init the NIC. The NSC manual suggests only a 726 * partial reset/re-init is necessary - but some chips 727 * seem to want more. The DMA lockup has been seen 728 * only with early rev chips - Methinks this bug was 729 * fixed in later revs. -DG 730 */ 731 if (isr & ED_ISR_OVW) { 732 ++ifp->if_ierrors; 733 #ifdef DEBUG 734 log(LOG_WARNING, "%s: warning - receiver " 735 "ring buffer overrun\n", 736 sc->sc_dev.dv_xname); 737 #endif 738 /* Stop/reset/re-init NIC. */ 739 dp8390_reset(sc); 740 } else { 741 /* 742 * Receiver Error. One or more of: CRC error, 743 * frame alignment error FIFO overrun, or 744 * missed packet. 745 */ 746 if (isr & ED_ISR_RXE) { 747 ++ifp->if_ierrors; 748 #ifdef DEBUG 749 if (dp8390_debug) { 750 printf("%s: receive error %x\n", 751 sc->sc_dev.dv_xname, 752 NIC_GET(regt, regh, 753 ED_P0_RSR)); 754 } 755 #endif 756 } 757 758 /* 759 * Go get the packet(s) 760 * XXX - Doing this on an error is dubious 761 * because there shouldn't be any data to get 762 * (we've configured the interface to not 763 * accept packets with errors). 764 */ 765 if (sc->recv_int) 766 (*sc->recv_int)(sc); 767 else 768 dp8390_rint(sc); 769 } 770 } 771 772 /* 773 * If it looks like the transmitter can take more data, attempt 774 * to start output on the interface. This is done after 775 * handling the receiver to give the receiver priority. 776 */ 777 dp8390_start(ifp); 778 779 /* 780 * Return NIC CR to standard state: page 0, remote DMA 781 * complete, start (toggling the TXP bit off, even if was just 782 * set in the transmit routine, is *okay* - it is 'edge' 783 * triggered from low to high). 784 */ 785 NIC_BARRIER(regt, regh); 786 NIC_PUT(regt, regh, ED_P0_CR, 787 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); 788 NIC_BARRIER(regt, regh); 789 790 /* 791 * If the Network Talley Counters overflow, read them to reset 792 * them. It appears that old 8390's won't clear the ISR flag 793 * otherwise - resulting in an infinite loop. 794 */ 795 if (isr & ED_ISR_CNT) { 796 (void)NIC_GET(regt, regh, ED_P0_CNTR0); 797 (void)NIC_GET(regt, regh, ED_P0_CNTR1); 798 (void)NIC_GET(regt, regh, ED_P0_CNTR2); 799 } 800 801 isr = NIC_GET(regt, regh, ED_P0_ISR); 802 if (!isr) 803 return (1); 804 } 805 } 806 807 int 808 dp8390_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 809 { 810 struct dp8390_softc *sc = ifp->if_softc; 811 struct ifaddr *ifa = (struct ifaddr *) data; 812 struct ifreq *ifr = (struct ifreq *) data; 813 int s, error = 0; 814 815 s = splnet(); 816 817 switch (cmd) { 818 case SIOCSIFADDR: 819 if ((error = dp8390_enable(sc)) != 0) 820 break; 821 ifp->if_flags |= IFF_UP; 822 if (!(ifp->if_flags & IFF_RUNNING)) 823 dp8390_init(sc); 824 #ifdef INET 825 if (ifa->ifa_addr->sa_family == AF_INET) 826 arp_ifinit(&sc->sc_arpcom, ifa); 827 #endif 828 break; 829 830 case SIOCSIFFLAGS: 831 if (ifp->if_flags & IFF_UP) { 832 if (ifp->if_flags & IFF_RUNNING) 833 error = ENETRESET; 834 else { 835 if ((error = dp8390_enable(sc)) != 0) 836 break; 837 dp8390_init(sc); 838 } 839 } else { 840 if (ifp->if_flags & IFF_RUNNING) { 841 dp8390_stop(sc); 842 ifp->if_flags &= ~IFF_RUNNING; 843 dp8390_disable(sc); 844 } 845 } 846 break; 847 848 case SIOCGIFMEDIA: 849 case SIOCSIFMEDIA: 850 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 851 break; 852 853 default: 854 error = ether_ioctl(ifp, &sc->sc_arpcom, cmd, data); 855 } 856 857 if (error == ENETRESET) { 858 if (ifp->if_flags & IFF_RUNNING) { 859 dp8390_stop(sc); 860 dp8390_init(sc); 861 } 862 error = 0; 863 } 864 865 splx(s); 866 return (error); 867 } 868 869 /* 870 * Retrieve packet from buffer memory and send to the next level up via 871 * ether_input(). If there is a BPF listener, give a copy to BPF, too. 872 */ 873 void 874 dp8390_read(struct dp8390_softc *sc, int buf, u_short len) 875 { 876 struct ifnet *ifp = &sc->sc_arpcom.ac_if; 877 struct mbuf *m; 878 879 /* Pull packet off interface. */ 880 m = dp8390_get(sc, buf, len); 881 if (m == 0) { 882 ifp->if_ierrors++; 883 return; 884 } 885 886 ifp->if_ipackets++; 887 888 #if NBPFILTER > 0 889 /* 890 * Check if there's a BPF listener on this interface. 891 * If so, hand off the raw packet to bpf. 892 */ 893 if (ifp->if_bpf) 894 bpf_mtap(ifp->if_bpf, m, BPF_DIRECTION_IN); 895 #endif 896 897 ether_input_mbuf(ifp, m); 898 } 899 900 901 /* 902 * Supporting routines. 903 */ 904 905 /* 906 * Compute the multicast address filter from the list of multicast addresses we 907 * need to listen to. 908 */ 909 void 910 dp8390_getmcaf(struct arpcom *ac, u_int8_t *af) 911 { 912 struct ifnet *ifp = &ac->ac_if; 913 struct ether_multi *enm; 914 u_int32_t crc; 915 int i; 916 struct ether_multistep step; 917 918 /* 919 * Set up multicast address filter by passing all multicast addresses 920 * through a crc generator, and then using the high order 6 bits as an 921 * index into the 64 bit logical address filter. The high order bit 922 * selects the word, while the rest of the bits select the bit within 923 * the word. 924 */ 925 926 if (ifp->if_flags & IFF_PROMISC || ac->ac_multirangecnt > 0) { 927 ifp->if_flags |= IFF_ALLMULTI; 928 for (i = 0; i < 8; i++) 929 af[i] = 0xff; 930 return; 931 } 932 for (i = 0; i < 8; i++) 933 af[i] = 0; 934 ETHER_FIRST_MULTI(step, ac, enm); 935 while (enm != NULL) { 936 /* Just want the 6 most significant bits. */ 937 crc = ether_crc32_be(enm->enm_addrlo, ETHER_ADDR_LEN) >> 26; 938 939 /* Turn on the corresponding bit in the filter. */ 940 af[crc >> 3] |= 1 << (crc & 0x7); 941 942 ETHER_NEXT_MULTI(step, enm); 943 } 944 ifp->if_flags &= ~IFF_ALLMULTI; 945 } 946 947 /* 948 * Copy data from receive buffer to a new mbuf chain allocating mbufs 949 * as needed. Return pointer to first mbuf in chain. 950 * sc = dp8390 info (softc) 951 * src = pointer in dp8390 ring buffer 952 * total_len = amount of data to copy 953 */ 954 struct mbuf * 955 dp8390_get(struct dp8390_softc *sc, int src, u_short total_len) 956 { 957 struct ifnet *ifp = &sc->sc_arpcom.ac_if; 958 struct mbuf *m, *m0, *newm; 959 u_short len; 960 961 MGETHDR(m0, M_DONTWAIT, MT_DATA); 962 if (m0 == NULL) 963 return (0); 964 m0->m_pkthdr.rcvif = ifp; 965 m0->m_pkthdr.len = total_len; 966 len = MHLEN; 967 m = m0; 968 969 while (total_len > 0) { 970 if (total_len >= MINCLSIZE) { 971 MCLGET(m, M_DONTWAIT); 972 if (!(m->m_flags & M_EXT)) 973 goto bad; 974 len = MCLBYTES; 975 } 976 977 /* 978 * Make sure the data after the Ethernet header is aligned. 979 */ 980 if (m == m0) { 981 caddr_t newdata = (caddr_t) 982 ALIGN(m->m_data + sizeof(struct ether_header)) - 983 sizeof(struct ether_header); 984 len -= newdata - m->m_data; 985 m->m_data = newdata; 986 } 987 988 m->m_len = len = min(total_len, len); 989 if (sc->ring_copy) 990 src = (*sc->ring_copy)(sc, src, mtod(m, caddr_t), len); 991 else 992 src = dp8390_ring_copy(sc, src, mtod(m, caddr_t), len); 993 994 total_len -= len; 995 if (total_len > 0) { 996 MGET(newm, M_DONTWAIT, MT_DATA); 997 if (newm == NULL) 998 goto bad; 999 len = MLEN; 1000 m = m->m_next = newm; 1001 } 1002 } 1003 1004 return (m0); 1005 1006 bad: 1007 m_freem(m0); 1008 return (0); 1009 } 1010 1011 1012 /* 1013 * Default driver support functions. 1014 * 1015 * NOTE: all support functions assume 8-bit shared memory. 1016 */ 1017 /* 1018 * Zero NIC buffer memory and verify that it is clear. 1019 */ 1020 static int 1021 dp8390_test_mem(struct dp8390_softc *sc) 1022 { 1023 bus_space_tag_t buft = sc->sc_buft; 1024 bus_space_handle_t bufh = sc->sc_bufh; 1025 int i; 1026 1027 bus_space_set_region_1(buft, bufh, sc->mem_start, 0, sc->mem_size); 1028 1029 for (i = 0; i < sc->mem_size; ++i) { 1030 if (bus_space_read_1(buft, bufh, sc->mem_start + i)) { 1031 printf(": failed to clear NIC buffer at offset %x - " 1032 "check configuration\n", (sc->mem_start + i)); 1033 return 1; 1034 } 1035 } 1036 1037 return 0; 1038 } 1039 1040 /* 1041 * Read a packet header from the ring, given the source offset. 1042 */ 1043 static __inline__ void 1044 dp8390_read_hdr(struct dp8390_softc *sc, int src, struct dp8390_ring *hdrp) 1045 { 1046 bus_space_tag_t buft = sc->sc_buft; 1047 bus_space_handle_t bufh = sc->sc_bufh; 1048 1049 /* 1050 * The byte count includes a 4 byte header that was added by 1051 * the NIC. 1052 */ 1053 hdrp->rsr = bus_space_read_1(buft, bufh, src); 1054 hdrp->next_packet = bus_space_read_1(buft, bufh, src + 1); 1055 hdrp->count = bus_space_read_1(buft, bufh, src + 2) | 1056 (bus_space_read_1(buft, bufh, src + 3) << 8); 1057 } 1058 1059 /* 1060 * Copy `amount' bytes from a packet in the ring buffer to a linear 1061 * destination buffer, given a source offset and destination address. 1062 * Takes into account ring-wrap. 1063 */ 1064 static __inline__ int 1065 dp8390_ring_copy(struct dp8390_softc *sc, int src, caddr_t dst, u_short amount) 1066 { 1067 bus_space_tag_t buft = sc->sc_buft; 1068 bus_space_handle_t bufh = sc->sc_bufh; 1069 u_short tmp_amount; 1070 1071 /* Does copy wrap to lower addr in ring buffer? */ 1072 if (src + amount > sc->mem_end) { 1073 tmp_amount = sc->mem_end - src; 1074 1075 /* Copy amount up to end of NIC memory. */ 1076 bus_space_read_region_1(buft, bufh, src, dst, tmp_amount); 1077 1078 amount -= tmp_amount; 1079 src = sc->mem_ring; 1080 dst += tmp_amount; 1081 } 1082 bus_space_read_region_1(buft, bufh, src, dst, amount); 1083 1084 return (src + amount); 1085 } 1086 1087 /* 1088 * Copy a packet from an mbuf to the transmit buffer on the card. 1089 * 1090 * Currently uses an extra buffer/extra memory copy, unless the whole 1091 * packet fits in one mbuf. 1092 */ 1093 static __inline__ int 1094 dp8390_write_mbuf(struct dp8390_softc *sc, struct mbuf *m, int buf) 1095 { 1096 bus_space_tag_t buft = sc->sc_buft; 1097 bus_space_handle_t bufh = sc->sc_bufh; 1098 u_char *data; 1099 int len, totlen = 0; 1100 1101 for (; m ; m = m->m_next) { 1102 data = mtod(m, u_char *); 1103 len = m->m_len; 1104 if (len > 0) { 1105 bus_space_write_region_1(buft, bufh, buf, data, len); 1106 totlen += len; 1107 buf += len; 1108 } 1109 } 1110 1111 return (totlen); 1112 } 1113 1114 /* 1115 * Enable power on the interface. 1116 */ 1117 int 1118 dp8390_enable(struct dp8390_softc *sc) 1119 { 1120 1121 if (sc->sc_enabled == 0 && sc->sc_enable != NULL) { 1122 if ((*sc->sc_enable)(sc) != 0) { 1123 printf("%s: device enable failed\n", 1124 sc->sc_dev.dv_xname); 1125 return (EIO); 1126 } 1127 } 1128 1129 sc->sc_enabled = 1; 1130 return (0); 1131 } 1132 1133 /* 1134 * Disable power on the interface. 1135 */ 1136 void 1137 dp8390_disable(struct dp8390_softc *sc) 1138 { 1139 if (sc->sc_enabled != 0 && sc->sc_disable != NULL) { 1140 (*sc->sc_disable)(sc); 1141 sc->sc_enabled = 0; 1142 } 1143 } 1144 1145 int 1146 dp8390_detach(struct dp8390_softc *sc, int flags) 1147 { 1148 struct ifnet *ifp = &sc->sc_arpcom.ac_if; 1149 1150 /* dp8390_disable() checks sc->sc_enabled */ 1151 dp8390_disable(sc); 1152 1153 if (sc->sc_media_fini != NULL) 1154 (*sc->sc_media_fini)(sc); 1155 1156 /* Delete all reamining media. */ 1157 ifmedia_delete_instance(&sc->sc_media, IFM_INST_ANY); 1158 1159 ether_ifdetach(ifp); 1160 if_detach(ifp); 1161 1162 return (0); 1163 } 1164