1 /* $NetBSD: dp8390.c,v 1.80 2012/02/02 19:43:03 tls Exp $ */ 2 3 /* 4 * Device driver for National Semiconductor DS8390/WD83C690 based ethernet 5 * adapters. 6 * 7 * Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved. 8 * 9 * Copyright (C) 1993, David Greenman. This software may be used, modified, 10 * copied, distributed, and sold, in both source and binary form provided that 11 * the above copyright and these terms are retained. Under no circumstances is 12 * the author responsible for the proper functioning of this software, nor does 13 * the author assume any responsibility for damages incurred with its use. 14 */ 15 16 #include <sys/cdefs.h> 17 __KERNEL_RCSID(0, "$NetBSD: dp8390.c,v 1.80 2012/02/02 19:43:03 tls Exp $"); 18 19 #include "opt_ipkdb.h" 20 #include "opt_inet.h" 21 22 #include <sys/param.h> 23 #include <sys/systm.h> 24 #include <sys/device.h> 25 #include <sys/errno.h> 26 #include <sys/ioctl.h> 27 #include <sys/mbuf.h> 28 #include <sys/socket.h> 29 #include <sys/syslog.h> 30 31 #include <sys/rnd.h> 32 33 #include <net/if.h> 34 #include <net/if_dl.h> 35 #include <net/if_types.h> 36 #include <net/if_media.h> 37 #include <net/if_ether.h> 38 39 #ifdef INET 40 #include <netinet/in.h> 41 #include <netinet/in_systm.h> 42 #include <netinet/in_var.h> 43 #include <netinet/ip.h> 44 #include <netinet/if_inarp.h> 45 #endif 46 47 48 #include <net/bpf.h> 49 #include <net/bpfdesc.h> 50 51 #include <sys/bus.h> 52 53 #ifdef IPKDB_DP8390 54 #include <ipkdb/ipkdb.h> 55 #endif 56 57 #include <dev/ic/dp8390reg.h> 58 #include <dev/ic/dp8390var.h> 59 60 #ifdef DEBUG 61 int dp8390_debug = 0; 62 #endif 63 64 static void dp8390_xmit(struct dp8390_softc *); 65 66 static void dp8390_read_hdr(struct dp8390_softc *, int, struct dp8390_ring *); 67 static int dp8390_ring_copy(struct dp8390_softc *, int, void *, u_short); 68 static int dp8390_write_mbuf(struct dp8390_softc *, struct mbuf *, int); 69 70 static int dp8390_test_mem(struct dp8390_softc *); 71 72 /* 73 * Standard media init routine for the dp8390. 74 */ 75 void 76 dp8390_media_init(struct dp8390_softc *sc) 77 { 78 79 ifmedia_init(&sc->sc_media, 0, dp8390_mediachange, dp8390_mediastatus); 80 ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); 81 ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); 82 } 83 84 /* 85 * Do bus-independent setup. 86 */ 87 int 88 dp8390_config(struct dp8390_softc *sc) 89 { 90 struct ifnet *ifp = &sc->sc_ec.ec_if; 91 int rv; 92 93 rv = 1; 94 95 if (sc->test_mem == NULL) 96 sc->test_mem = dp8390_test_mem; 97 if (sc->read_hdr == NULL) 98 sc->read_hdr = dp8390_read_hdr; 99 if (sc->recv_int == NULL) 100 sc->recv_int = dp8390_rint; 101 if (sc->ring_copy == NULL) 102 sc->ring_copy = dp8390_ring_copy; 103 if (sc->write_mbuf == NULL) 104 sc->write_mbuf = dp8390_write_mbuf; 105 106 /* Allocate one xmit buffer if < 16k, two buffers otherwise. */ 107 if ((sc->mem_size < 16384) || 108 (sc->sc_flags & DP8390_NO_MULTI_BUFFERING)) 109 sc->txb_cnt = 1; 110 else if (sc->mem_size < 8192 * 3) 111 sc->txb_cnt = 2; 112 else 113 sc->txb_cnt = 3; 114 115 sc->tx_page_start = sc->mem_start >> ED_PAGE_SHIFT; 116 sc->rec_page_start = sc->tx_page_start + sc->txb_cnt * ED_TXBUF_SIZE; 117 sc->rec_page_stop = sc->tx_page_start + (sc->mem_size >> ED_PAGE_SHIFT); 118 sc->mem_ring = sc->mem_start + 119 ((sc->txb_cnt * ED_TXBUF_SIZE) << ED_PAGE_SHIFT); 120 sc->mem_end = sc->mem_start + sc->mem_size; 121 122 /* Now zero memory and verify that it is clear. */ 123 if ((*sc->test_mem)(sc)) 124 goto out; 125 126 /* Set interface to stopped condition (reset). */ 127 dp8390_stop(sc); 128 129 /* Initialize ifnet structure. */ 130 strcpy(ifp->if_xname, device_xname(sc->sc_dev)); 131 ifp->if_softc = sc; 132 ifp->if_start = dp8390_start; 133 ifp->if_ioctl = dp8390_ioctl; 134 if (ifp->if_watchdog == NULL) 135 ifp->if_watchdog = dp8390_watchdog; 136 ifp->if_flags = 137 IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; 138 IFQ_SET_READY(&ifp->if_snd); 139 140 /* Print additional info when attached. */ 141 aprint_normal_dev(sc->sc_dev, "Ethernet address %s\n", 142 ether_sprintf(sc->sc_enaddr)); 143 144 /* Initialize media goo. */ 145 (*sc->sc_media_init)(sc); 146 147 /* 148 * We can support 802.1Q VLAN-sized frames. 149 */ 150 sc->sc_ec.ec_capabilities |= ETHERCAP_VLAN_MTU; 151 152 /* Attach the interface. */ 153 if_attach(ifp); 154 ether_ifattach(ifp, sc->sc_enaddr); 155 156 rnd_attach_source(&sc->rnd_source, device_xname(sc->sc_dev), 157 RND_TYPE_NET, 0); 158 159 /* The attach is successful. */ 160 sc->sc_flags |= DP8390_ATTACHED; 161 162 rv = 0; 163 out: 164 return rv; 165 } 166 167 /* 168 * Media change callback. 169 */ 170 int 171 dp8390_mediachange(struct ifnet *ifp) 172 { 173 struct dp8390_softc *sc = ifp->if_softc; 174 175 if (sc->sc_mediachange) 176 return (*sc->sc_mediachange)(sc); 177 return 0; 178 } 179 180 /* 181 * Media status callback. 182 */ 183 void 184 dp8390_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) 185 { 186 struct dp8390_softc *sc = ifp->if_softc; 187 188 if (sc->sc_enabled == 0) { 189 ifmr->ifm_active = IFM_ETHER | IFM_NONE; 190 ifmr->ifm_status = 0; 191 return; 192 } 193 194 if (sc->sc_mediastatus) 195 (*sc->sc_mediastatus)(sc, ifmr); 196 } 197 198 /* 199 * Reset interface. 200 */ 201 void 202 dp8390_reset(struct dp8390_softc *sc) 203 { 204 int s; 205 206 s = splnet(); 207 dp8390_stop(sc); 208 dp8390_init(sc); 209 splx(s); 210 } 211 212 /* 213 * Take interface offline. 214 */ 215 void 216 dp8390_stop(struct dp8390_softc *sc) 217 { 218 bus_space_tag_t regt = sc->sc_regt; 219 bus_space_handle_t regh = sc->sc_regh; 220 int n = 5000; 221 222 /* Stop everything on the interface, and select page 0 registers. */ 223 NIC_BARRIER(regt, regh); 224 NIC_PUT(regt, regh, ED_P0_CR, 225 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STP); 226 NIC_BARRIER(regt, regh); 227 228 /* 229 * Wait for interface to enter stopped state, but limit # of checks to 230 * 'n' (about 5ms). It shouldn't even take 5us on modern DS8390's, but 231 * just in case it's an old one. 232 */ 233 while (((NIC_GET(regt, regh, ED_P0_ISR) & ED_ISR_RST) == 0) && --n) 234 DELAY(1); 235 236 if (sc->stop_card != NULL) 237 (*sc->stop_card)(sc); 238 } 239 240 /* 241 * Device timeout/watchdog routine. Entered if the device neglects to generate 242 * an interrupt after a transmit has been started on it. 243 */ 244 245 void 246 dp8390_watchdog(struct ifnet *ifp) 247 { 248 struct dp8390_softc *sc = ifp->if_softc; 249 250 log(LOG_ERR, "%s: device timeout\n", device_xname(sc->sc_dev)); 251 ++sc->sc_ec.ec_if.if_oerrors; 252 253 dp8390_reset(sc); 254 } 255 256 /* 257 * Initialize device. 258 */ 259 void 260 dp8390_init(struct dp8390_softc *sc) 261 { 262 bus_space_tag_t regt = sc->sc_regt; 263 bus_space_handle_t regh = sc->sc_regh; 264 struct ifnet *ifp = &sc->sc_ec.ec_if; 265 uint8_t mcaf[8]; 266 int i; 267 268 /* 269 * Initialize the NIC in the exact order outlined in the NS manual. 270 * This init procedure is "mandatory"...don't change what or when 271 * things happen. 272 */ 273 274 /* Reset transmitter flags. */ 275 ifp->if_timer = 0; 276 277 sc->txb_inuse = 0; 278 sc->txb_new = 0; 279 sc->txb_next_tx = 0; 280 281 /* Set interface for page 0, remote DMA complete, stopped. */ 282 NIC_BARRIER(regt, regh); 283 NIC_PUT(regt, regh, ED_P0_CR, 284 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STP); 285 NIC_BARRIER(regt, regh); 286 287 if (sc->dcr_reg & ED_DCR_LS) { 288 NIC_PUT(regt, regh, ED_P0_DCR, sc->dcr_reg); 289 } else { 290 /* 291 * Set FIFO threshold to 8, No auto-init Remote DMA, byte 292 * order=80x86, byte-wide DMA xfers, 293 */ 294 NIC_PUT(regt, regh, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS); 295 } 296 297 /* Clear remote byte count registers. */ 298 NIC_PUT(regt, regh, ED_P0_RBCR0, 0); 299 NIC_PUT(regt, regh, ED_P0_RBCR1, 0); 300 301 /* Tell RCR to do nothing for now. */ 302 NIC_PUT(regt, regh, ED_P0_RCR, ED_RCR_MON | sc->rcr_proto); 303 304 /* Place NIC in internal loopback mode. */ 305 NIC_PUT(regt, regh, ED_P0_TCR, ED_TCR_LB0); 306 307 /* Set lower bits of byte addressable framing to 0. */ 308 if (sc->is790) 309 NIC_PUT(regt, regh, 0x09, 0); 310 311 /* Initialize receive buffer ring. */ 312 NIC_PUT(regt, regh, ED_P0_BNRY, sc->rec_page_start); 313 NIC_PUT(regt, regh, ED_P0_PSTART, sc->rec_page_start); 314 NIC_PUT(regt, regh, ED_P0_PSTOP, sc->rec_page_stop); 315 316 /* 317 * Enable the following interrupts: receive/transmit complete, 318 * receive/transmit error, and Receiver OverWrite. 319 * 320 * Counter overflow and Remote DMA complete are *not* enabled. 321 */ 322 NIC_PUT(regt, regh, ED_P0_IMR, 323 ED_IMR_PRXE | ED_IMR_PTXE | ED_IMR_RXEE | ED_IMR_TXEE | 324 ED_IMR_OVWE); 325 326 /* 327 * Clear all interrupts. A '1' in each bit position clears the 328 * corresponding flag. 329 */ 330 NIC_PUT(regt, regh, ED_P0_ISR, 0xff); 331 332 /* Program command register for page 1. */ 333 NIC_BARRIER(regt, regh); 334 NIC_PUT(regt, regh, ED_P0_CR, 335 sc->cr_proto | ED_CR_PAGE_1 | ED_CR_STP); 336 NIC_BARRIER(regt, regh); 337 338 /* Copy out our station address. */ 339 for (i = 0; i < ETHER_ADDR_LEN; i++) 340 NIC_PUT(regt, regh, ED_P1_PAR0 + i, CLLADDR(ifp->if_sadl)[i]); 341 342 /* Set multicast filter on chip. */ 343 dp8390_getmcaf(&sc->sc_ec, mcaf); 344 for (i = 0; i < 8; i++) 345 NIC_PUT(regt, regh, ED_P1_MAR0 + i, mcaf[i]); 346 347 /* 348 * Set current page pointer to one page after the boundary pointer, as 349 * recommended in the National manual. 350 */ 351 sc->next_packet = sc->rec_page_start + 1; 352 NIC_PUT(regt, regh, ED_P1_CURR, sc->next_packet); 353 354 /* Program command register for page 0. */ 355 NIC_BARRIER(regt, regh); 356 NIC_PUT(regt, regh, ED_P1_CR, 357 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STP); 358 NIC_BARRIER(regt, regh); 359 360 /* Accept broadcast and multicast packets by default. */ 361 i = ED_RCR_AB | ED_RCR_AM | sc->rcr_proto; 362 if (ifp->if_flags & IFF_PROMISC) { 363 /* 364 * Set promiscuous mode. Multicast filter was set earlier so 365 * that we should receive all multicast packets. 366 */ 367 i |= ED_RCR_PRO | ED_RCR_AR | ED_RCR_SEP; 368 } 369 NIC_PUT(regt, regh, ED_P0_RCR, i); 370 371 /* Take interface out of loopback. */ 372 NIC_PUT(regt, regh, ED_P0_TCR, 0); 373 374 /* Do any card-specific initialization, if applicable. */ 375 if (sc->init_card != NULL) 376 (*sc->init_card)(sc); 377 378 /* Fire up the interface. */ 379 NIC_BARRIER(regt, regh); 380 NIC_PUT(regt, regh, ED_P0_CR, 381 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); 382 383 /* Set 'running' flag, and clear output active flag. */ 384 ifp->if_flags |= IFF_RUNNING; 385 ifp->if_flags &= ~IFF_OACTIVE; 386 387 /* ...and attempt to start output. */ 388 dp8390_start(ifp); 389 } 390 391 /* 392 * This routine actually starts the transmission on the interface. 393 */ 394 static void 395 dp8390_xmit(struct dp8390_softc *sc) 396 { 397 bus_space_tag_t regt = sc->sc_regt; 398 bus_space_handle_t regh = sc->sc_regh; 399 struct ifnet *ifp = &sc->sc_ec.ec_if; 400 u_short len; 401 402 #ifdef DIAGNOSTIC 403 if ((sc->txb_next_tx + sc->txb_inuse) % sc->txb_cnt != sc->txb_new) 404 panic("dp8390_xmit: desync, next_tx=%d inuse=%d cnt=%d new=%d", 405 sc->txb_next_tx, sc->txb_inuse, sc->txb_cnt, sc->txb_new); 406 407 if (sc->txb_inuse == 0) 408 panic("dp8390_xmit: no packets to xmit"); 409 #endif 410 411 len = sc->txb_len[sc->txb_next_tx]; 412 413 /* Set NIC for page 0 register access. */ 414 NIC_BARRIER(regt, regh); 415 NIC_PUT(regt, regh, ED_P0_CR, 416 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); 417 NIC_BARRIER(regt, regh); 418 419 /* Set TX buffer start page. */ 420 NIC_PUT(regt, regh, ED_P0_TPSR, 421 sc->tx_page_start + sc->txb_next_tx * ED_TXBUF_SIZE); 422 423 /* Set TX length. */ 424 NIC_PUT(regt, regh, ED_P0_TBCR0, len); 425 NIC_PUT(regt, regh, ED_P0_TBCR1, len >> 8); 426 427 /* Set page 0, remote DMA complete, transmit packet, and *start*. */ 428 NIC_BARRIER(regt, regh); 429 NIC_PUT(regt, regh, ED_P0_CR, 430 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_TXP | ED_CR_STA); 431 432 /* Point to next transmit buffer slot and wrap if necessary. */ 433 if (++sc->txb_next_tx == sc->txb_cnt) 434 sc->txb_next_tx = 0; 435 436 /* Set a timer just in case we never hear from the board again. */ 437 ifp->if_timer = 2; 438 } 439 440 /* 441 * Start output on interface. 442 * We make two assumptions here: 443 * 1) that the current priority is set to splnet _before_ this code 444 * is called *and* is returned to the appropriate priority after 445 * return 446 * 2) that the IFF_OACTIVE flag is checked before this code is called 447 * (i.e. that the output part of the interface is idle) 448 */ 449 void 450 dp8390_start(struct ifnet *ifp) 451 { 452 struct dp8390_softc *sc = ifp->if_softc; 453 struct mbuf *m0; 454 int buffer; 455 int len; 456 457 if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) 458 return; 459 460 outloop: 461 /* See if there is room to put another packet in the buffer. */ 462 if (sc->txb_inuse == sc->txb_cnt) { 463 /* No room. Indicate this to the outside world and exit. */ 464 ifp->if_flags |= IFF_OACTIVE; 465 return; 466 } 467 IFQ_DEQUEUE(&ifp->if_snd, m0); 468 if (m0 == NULL) 469 return; 470 471 /* We need to use m->m_pkthdr.len, so require the header */ 472 if ((m0->m_flags & M_PKTHDR) == 0) 473 panic("dp8390_start: no header mbuf"); 474 475 /* Tap off here if there is a BPF listener. */ 476 bpf_mtap(ifp, m0); 477 478 /* txb_new points to next open buffer slot. */ 479 buffer = sc->mem_start + 480 ((sc->txb_new * ED_TXBUF_SIZE) << ED_PAGE_SHIFT); 481 482 len = (*sc->write_mbuf)(sc, m0, buffer); 483 484 m_freem(m0); 485 sc->txb_len[sc->txb_new] = len; 486 487 /* Point to next buffer slot and wrap if necessary. */ 488 if (++sc->txb_new == sc->txb_cnt) 489 sc->txb_new = 0; 490 491 /* Start the first packet transmitting. */ 492 if (sc->txb_inuse++ == 0) 493 dp8390_xmit(sc); 494 495 /* Loop back to the top to possibly buffer more packets. */ 496 goto outloop; 497 } 498 499 /* 500 * Ethernet interface receiver interrupt. 501 */ 502 void 503 dp8390_rint(struct dp8390_softc *sc) 504 { 505 bus_space_tag_t regt = sc->sc_regt; 506 bus_space_handle_t regh = sc->sc_regh; 507 struct dp8390_ring packet_hdr; 508 int packet_ptr; 509 uint16_t len; 510 uint8_t boundary, current; 511 uint8_t nlen; 512 513 loop: 514 /* Set NIC to page 1 registers to get 'current' pointer. */ 515 NIC_BARRIER(regt, regh); 516 NIC_PUT(regt, regh, ED_P0_CR, 517 sc->cr_proto | ED_CR_PAGE_1 | ED_CR_STA); 518 NIC_BARRIER(regt, regh); 519 520 /* 521 * 'sc->next_packet' is the logical beginning of the ring-buffer - i.e. 522 * it points to where new data has been buffered. The 'CURR' (current) 523 * register points to the logical end of the ring-buffer - i.e. it 524 * points to where additional new data will be added. We loop here 525 * until the logical beginning equals the logical end (or in other 526 * words, until the ring-buffer is empty). 527 */ 528 current = NIC_GET(regt, regh, ED_P1_CURR); 529 if (sc->next_packet == current) 530 return; 531 532 /* Set NIC to page 0 registers to update boundary register. */ 533 NIC_BARRIER(regt, regh); 534 NIC_PUT(regt, regh, ED_P1_CR, 535 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); 536 NIC_BARRIER(regt, regh); 537 538 do { 539 /* Get pointer to this buffer's header structure. */ 540 packet_ptr = sc->mem_ring + 541 ((sc->next_packet - sc->rec_page_start) << ED_PAGE_SHIFT); 542 543 (*sc->read_hdr)(sc, packet_ptr, &packet_hdr); 544 len = packet_hdr.count; 545 546 /* 547 * Try do deal with old, buggy chips that sometimes duplicate 548 * the low byte of the length into the high byte. We do this 549 * by simply ignoring the high byte of the length and always 550 * recalculating it. 551 * 552 * NOTE: sc->next_packet is pointing at the current packet. 553 */ 554 if (packet_hdr.next_packet >= sc->next_packet) 555 nlen = (packet_hdr.next_packet - sc->next_packet); 556 else 557 nlen = ((packet_hdr.next_packet - sc->rec_page_start) + 558 (sc->rec_page_stop - sc->next_packet)); 559 --nlen; 560 if ((len & ED_PAGE_MASK) + sizeof(packet_hdr) > ED_PAGE_SIZE) 561 --nlen; 562 len = (len & ED_PAGE_MASK) | (nlen << ED_PAGE_SHIFT); 563 #ifdef DIAGNOSTIC 564 if (len != packet_hdr.count) { 565 aprint_verbose_dev(sc->sc_dev, "length does not match " 566 "next packet pointer\n"); 567 aprint_verbose_dev(sc->sc_dev, "len %04x nlen %04x " 568 "start %02x first %02x curr %02x next %02x " 569 "stop %02x\n", packet_hdr.count, len, 570 sc->rec_page_start, sc->next_packet, current, 571 packet_hdr.next_packet, sc->rec_page_stop); 572 } 573 #endif 574 575 /* 576 * Be fairly liberal about what we allow as a "reasonable" 577 * length so that a [crufty] packet will make it to BPF (and 578 * can thus be analyzed). Note that all that is really 579 * important is that we have a length that will fit into one 580 * mbuf cluster or less; the upper layer protocols can then 581 * figure out the length from their own length field(s). 582 */ 583 if (len <= MCLBYTES && 584 packet_hdr.next_packet >= sc->rec_page_start && 585 packet_hdr.next_packet < sc->rec_page_stop) { 586 /* Go get packet. */ 587 dp8390_read(sc, 588 packet_ptr + sizeof(struct dp8390_ring), 589 len - sizeof(struct dp8390_ring)); 590 } else { 591 /* Really BAD. The ring pointers are corrupted. */ 592 log(LOG_ERR, "%s: NIC memory corrupt - " 593 "invalid packet length %d\n", 594 device_xname(sc->sc_dev), len); 595 ++sc->sc_ec.ec_if.if_ierrors; 596 dp8390_reset(sc); 597 return; 598 } 599 600 /* Update next packet pointer. */ 601 sc->next_packet = packet_hdr.next_packet; 602 603 /* 604 * Update NIC boundary pointer - being careful to keep it one 605 * buffer behind (as recommended by NS databook). 606 */ 607 boundary = sc->next_packet - 1; 608 if (boundary < sc->rec_page_start) 609 boundary = sc->rec_page_stop - 1; 610 NIC_PUT(regt, regh, ED_P0_BNRY, boundary); 611 } while (sc->next_packet != current); 612 613 goto loop; 614 } 615 616 /* Ethernet interface interrupt processor. */ 617 int 618 dp8390_intr(void *arg) 619 { 620 struct dp8390_softc *sc = arg; 621 bus_space_tag_t regt = sc->sc_regt; 622 bus_space_handle_t regh = sc->sc_regh; 623 struct ifnet *ifp = &sc->sc_ec.ec_if; 624 uint8_t isr; 625 uint8_t rndisr; 626 627 if (sc->sc_enabled == 0 || 628 !device_is_active(sc->sc_dev)) 629 return 0; 630 631 /* Set NIC to page 0 registers. */ 632 NIC_BARRIER(regt, regh); 633 NIC_PUT(regt, regh, ED_P0_CR, 634 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); 635 NIC_BARRIER(regt, regh); 636 637 isr = NIC_GET(regt, regh, ED_P0_ISR); 638 if (isr == 0) 639 return 0; 640 641 rndisr = isr; 642 643 /* Loop until there are no more new interrupts. */ 644 for (;;) { 645 /* 646 * Reset all the bits that we are 'acknowledging' by writing a 647 * '1' to each bit position that was set. 648 * (Writing a '1' *clears* the bit.) 649 */ 650 NIC_PUT(regt, regh, ED_P0_ISR, isr); 651 652 /* Work around for AX88190 bug */ 653 if ((sc->sc_flags & DP8390_DO_AX88190_WORKAROUND) != 0) 654 while ((NIC_GET(regt, regh, ED_P0_ISR) & isr) != 0) { 655 NIC_PUT(regt, regh, ED_P0_ISR, 0); 656 NIC_PUT(regt, regh, ED_P0_ISR, isr); 657 } 658 659 /* 660 * Handle transmitter interrupts. Handle these first because 661 * the receiver will reset the board under some conditions. 662 * 663 * If the chip was reset while a packet was transmitting, it 664 * may still deliver a TX interrupt. In this case, just ignore 665 * the interrupt. 666 */ 667 if ((isr & (ED_ISR_PTX | ED_ISR_TXE)) != 0 && 668 sc->txb_inuse != 0) { 669 uint8_t collisions = 670 NIC_GET(regt, regh, ED_P0_NCR) & 0x0f; 671 672 /* 673 * Check for transmit error. If a TX completed with an 674 * error, we end up throwing the packet away. Really 675 * the only error that is possible is excessive 676 * collisions, and in this case it is best to allow the 677 * automatic mechanisms of TCP to backoff the flow. Of 678 * course, with UDP we're screwed, but this is expected 679 * when a network is heavily loaded. 680 */ 681 if ((isr & ED_ISR_TXE) != 0) { 682 /* 683 * Excessive collisions (16). 684 */ 685 if ((NIC_GET(regt, regh, ED_P0_TSR) 686 & ED_TSR_ABT) && (collisions == 0)) { 687 /* 688 * When collisions total 16, the P0_NCR 689 * will indicate 0, and the TSR_ABT is 690 * set. 691 */ 692 collisions = 16; 693 } 694 695 /* Update output errors counter. */ 696 ++ifp->if_oerrors; 697 } else { 698 /* 699 * Throw away the non-error status bits. 700 * 701 * XXX 702 * It may be useful to detect loss of carrier 703 * and late collisions here. 704 */ 705 (void)NIC_GET(regt, regh, ED_P0_TSR); 706 707 /* 708 * Update total number of successfully 709 * transmitted packets. 710 */ 711 ++ifp->if_opackets; 712 } 713 714 /* Clear watchdog timer. */ 715 ifp->if_timer = 0; 716 ifp->if_flags &= ~IFF_OACTIVE; 717 718 /* 719 * Add in total number of collisions on last 720 * transmission. 721 */ 722 ifp->if_collisions += collisions; 723 724 /* 725 * Decrement buffer in-use count if not zero (can only 726 * be zero if a transmitter interrupt occurred while not 727 * actually transmitting). 728 * If data is ready to transmit, start it transmitting, 729 * otherwise defer until after handling receiver. 730 */ 731 if (--sc->txb_inuse != 0) 732 dp8390_xmit(sc); 733 } 734 735 /* Handle receiver interrupts. */ 736 if ((isr & (ED_ISR_PRX | ED_ISR_RXE | ED_ISR_OVW)) != 0) { 737 /* 738 * Overwrite warning. In order to make sure that a 739 * lockup of the local DMA hasn't occurred, we reset 740 * and re-init the NIC. The NSC manual suggests only a 741 * partial reset/re-init is necessary - but some chips 742 * seem to want more. The DMA lockup has been seen 743 * only with early rev chips - Methinks this bug was 744 * fixed in later revs. -DG 745 */ 746 if ((isr & ED_ISR_OVW) != 0) { 747 ++ifp->if_ierrors; 748 #ifdef DIAGNOSTIC 749 log(LOG_WARNING, "%s: warning - receiver " 750 "ring buffer overrun\n", 751 device_xname(sc->sc_dev)); 752 #endif 753 /* Stop/reset/re-init NIC. */ 754 dp8390_reset(sc); 755 } else { 756 /* 757 * Receiver Error. One or more of: CRC error, 758 * frame alignment error FIFO overrun, or 759 * missed packet. 760 */ 761 if ((isr & ED_ISR_RXE) != 0) { 762 ++ifp->if_ierrors; 763 #ifdef DEBUG 764 if (dp8390_debug) { 765 printf("%s: receive error %x\n", 766 device_xname(sc->sc_dev), 767 NIC_GET(regt, regh, 768 ED_P0_RSR)); 769 } 770 #endif 771 } 772 773 /* 774 * Go get the packet(s) 775 * XXX - Doing this on an error is dubious 776 * because there shouldn't be any data to get 777 * (we've configured the interface to not 778 * accept packets with errors). 779 */ 780 (*sc->recv_int)(sc); 781 } 782 } 783 784 /* 785 * If it looks like the transmitter can take more data, attempt 786 * to start output on the interface. This is done after 787 * handling the receiver to give the receiver priority. 788 */ 789 dp8390_start(ifp); 790 791 /* 792 * Return NIC CR to standard state: page 0, remote DMA 793 * complete, start (toggling the TXP bit off, even if was just 794 * set in the transmit routine, is *okay* - it is 'edge' 795 * triggered from low to high). 796 */ 797 NIC_BARRIER(regt, regh); 798 NIC_PUT(regt, regh, ED_P0_CR, 799 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); 800 NIC_BARRIER(regt, regh); 801 802 /* 803 * If the Network Talley Counters overflow, read them to reset 804 * them. It appears that old 8390's won't clear the ISR flag 805 * otherwise - resulting in an infinite loop. 806 */ 807 if ((isr & ED_ISR_CNT) != 0) { 808 (void)NIC_GET(regt, regh, ED_P0_CNTR0); 809 (void)NIC_GET(regt, regh, ED_P0_CNTR1); 810 (void)NIC_GET(regt, regh, ED_P0_CNTR2); 811 } 812 813 isr = NIC_GET(regt, regh, ED_P0_ISR); 814 if (isr == 0) 815 goto out; 816 } 817 818 out: 819 rnd_add_uint32(&sc->rnd_source, rndisr); 820 return 1; 821 } 822 823 /* 824 * Process an ioctl request. This code needs some work - it looks pretty ugly. 825 */ 826 int 827 dp8390_ioctl(struct ifnet *ifp, u_long cmd, void *data) 828 { 829 struct dp8390_softc *sc = ifp->if_softc; 830 struct ifaddr *ifa = data; 831 struct ifreq *ifr = data; 832 int s, error = 0; 833 834 s = splnet(); 835 836 switch (cmd) { 837 838 case SIOCINITIFADDR: 839 if ((error = dp8390_enable(sc)) != 0) 840 break; 841 ifp->if_flags |= IFF_UP; 842 843 dp8390_init(sc); 844 switch (ifa->ifa_addr->sa_family) { 845 #ifdef INET 846 case AF_INET: 847 arp_ifinit(ifp, ifa); 848 break; 849 #endif 850 default: 851 break; 852 } 853 break; 854 855 case SIOCSIFFLAGS: 856 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 857 break; 858 switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { 859 case IFF_RUNNING: 860 /* 861 * If interface is marked down and it is running, then 862 * stop it. 863 */ 864 dp8390_stop(sc); 865 ifp->if_flags &= ~IFF_RUNNING; 866 dp8390_disable(sc); 867 break; 868 case IFF_UP: 869 /* 870 * If interface is marked up and it is stopped, then 871 * start it. 872 */ 873 if ((error = dp8390_enable(sc)) != 0) 874 break; 875 dp8390_init(sc); 876 break; 877 case IFF_UP|IFF_RUNNING: 878 /* 879 * Reset the interface to pick up changes in any other 880 * flags that affect hardware registers. 881 */ 882 dp8390_stop(sc); 883 dp8390_init(sc); 884 break; 885 default: 886 break; 887 } 888 break; 889 890 case SIOCADDMULTI: 891 case SIOCDELMULTI: 892 if (sc->sc_enabled == 0) { 893 error = EIO; 894 break; 895 } 896 897 /* Update our multicast list. */ 898 if ((error = ether_ioctl(ifp, cmd, data)) == ENETRESET) { 899 /* 900 * Multicast list has changed; set the hardware filter 901 * accordingly. 902 */ 903 if (ifp->if_flags & IFF_RUNNING) { 904 dp8390_stop(sc); /* XXX for ds_setmcaf? */ 905 dp8390_init(sc); 906 } 907 error = 0; 908 } 909 break; 910 911 case SIOCGIFMEDIA: 912 case SIOCSIFMEDIA: 913 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 914 break; 915 916 default: 917 error = ether_ioctl(ifp, cmd, data); 918 break; 919 } 920 921 splx(s); 922 return error; 923 } 924 925 /* 926 * Retrieve packet from buffer memory and send to the next level up via 927 * ether_input(). If there is a BPF listener, give a copy to BPF, too. 928 */ 929 void 930 dp8390_read(struct dp8390_softc *sc, int buf, u_short len) 931 { 932 struct ifnet *ifp = &sc->sc_ec.ec_if; 933 struct mbuf *m; 934 935 /* Pull packet off interface. */ 936 m = dp8390_get(sc, buf, len); 937 if (m == NULL) { 938 ifp->if_ierrors++; 939 return; 940 } 941 942 ifp->if_ipackets++; 943 944 /* 945 * Check if there's a BPF listener on this interface. 946 * If so, hand off the raw packet to bpf. 947 */ 948 bpf_mtap(ifp, m); 949 950 (*ifp->if_input)(ifp, m); 951 } 952 953 954 /* 955 * Supporting routines. 956 */ 957 958 /* 959 * Compute the multicast address filter from the list of multicast addresses we 960 * need to listen to. 961 */ 962 void 963 dp8390_getmcaf(struct ethercom *ec, uint8_t *af) 964 { 965 struct ifnet *ifp = &ec->ec_if; 966 struct ether_multi *enm; 967 uint32_t crc; 968 int i; 969 struct ether_multistep step; 970 971 /* 972 * Set up multicast address filter by passing all multicast addresses 973 * through a crc generator, and then using the high order 6 bits as an 974 * index into the 64 bit logical address filter. The high order bit 975 * selects the word, while the rest of the bits select the bit within 976 * the word. 977 */ 978 979 if (ifp->if_flags & IFF_PROMISC) { 980 ifp->if_flags |= IFF_ALLMULTI; 981 for (i = 0; i < 8; i++) 982 af[i] = 0xff; 983 return; 984 } 985 for (i = 0; i < 8; i++) 986 af[i] = 0; 987 ETHER_FIRST_MULTI(step, ec, enm); 988 while (enm != NULL) { 989 if (memcmp(enm->enm_addrlo, enm->enm_addrhi, 990 sizeof(enm->enm_addrlo)) != 0) { 991 /* 992 * We must listen to a range of multicast addresses. 993 * For now, just accept all multicasts, rather than 994 * trying to set only those filter bits needed to match 995 * the range. (At this time, the only use of address 996 * ranges is for IP multicast routing, for which the 997 * range is big enough to require all bits set.) 998 */ 999 ifp->if_flags |= IFF_ALLMULTI; 1000 for (i = 0; i < 8; i++) 1001 af[i] = 0xff; 1002 return; 1003 } 1004 1005 crc = ether_crc32_be(enm->enm_addrlo, ETHER_ADDR_LEN); 1006 1007 /* Just want the 6 most significant bits. */ 1008 crc >>= 26; 1009 1010 /* Turn on the corresponding bit in the filter. */ 1011 af[crc >> 3] |= 1 << (crc & 0x7); 1012 1013 ETHER_NEXT_MULTI(step, enm); 1014 } 1015 ifp->if_flags &= ~IFF_ALLMULTI; 1016 } 1017 1018 /* 1019 * Copy data from receive buffer to a new mbuf chain allocating mbufs 1020 * as needed. Return pointer to first mbuf in chain. 1021 * sc = dp8390 info (softc) 1022 * src = pointer in dp8390 ring buffer 1023 * total_len = amount of data to copy 1024 */ 1025 struct mbuf * 1026 dp8390_get(struct dp8390_softc *sc, int src, u_short total_len) 1027 { 1028 struct ifnet *ifp = &sc->sc_ec.ec_if; 1029 struct mbuf *m, *m0, *newm; 1030 u_short len; 1031 1032 MGETHDR(m0, M_DONTWAIT, MT_DATA); 1033 if (m0 == NULL) 1034 return NULL; 1035 m0->m_pkthdr.rcvif = ifp; 1036 m0->m_pkthdr.len = total_len; 1037 len = MHLEN; 1038 m = m0; 1039 1040 while (total_len > 0) { 1041 if (total_len >= MINCLSIZE) { 1042 MCLGET(m, M_DONTWAIT); 1043 if ((m->m_flags & M_EXT) == 0) 1044 goto bad; 1045 len = MCLBYTES; 1046 } 1047 1048 /* 1049 * Make sure the data after the Ethernet header is aligned. 1050 */ 1051 if (m == m0) { 1052 char *newdata = (char *) 1053 ALIGN(m->m_data + sizeof(struct ether_header)) - 1054 sizeof(struct ether_header); 1055 len -= newdata - m->m_data; 1056 m->m_data = newdata; 1057 } 1058 1059 m->m_len = len = min(total_len, len); 1060 src = (*sc->ring_copy)(sc, src, mtod(m, void *), len); 1061 1062 total_len -= len; 1063 if (total_len > 0) { 1064 MGET(newm, M_DONTWAIT, MT_DATA); 1065 if (newm == NULL) 1066 goto bad; 1067 len = MLEN; 1068 m = m->m_next = newm; 1069 } 1070 } 1071 1072 return m0; 1073 1074 bad: 1075 m_freem(m0); 1076 return NULL; 1077 } 1078 1079 1080 /* 1081 * Default driver support functions. 1082 * 1083 * NOTE: all support functions assume 8-bit shared memory. 1084 */ 1085 /* 1086 * Zero NIC buffer memory and verify that it is clear. 1087 */ 1088 static int 1089 dp8390_test_mem(struct dp8390_softc *sc) 1090 { 1091 bus_space_tag_t buft = sc->sc_buft; 1092 bus_space_handle_t bufh = sc->sc_bufh; 1093 int i; 1094 1095 bus_space_set_region_1(buft, bufh, sc->mem_start, 0, sc->mem_size); 1096 1097 for (i = 0; i < sc->mem_size; ++i) { 1098 if (bus_space_read_1(buft, bufh, sc->mem_start + i)) { 1099 printf(": failed to clear NIC buffer at offset %x - " 1100 "check configuration\n", (sc->mem_start + i)); 1101 return 1; 1102 } 1103 } 1104 1105 return 0; 1106 } 1107 1108 /* 1109 * Read a packet header from the ring, given the source offset. 1110 */ 1111 static void 1112 dp8390_read_hdr(struct dp8390_softc *sc, int src, struct dp8390_ring *hdrp) 1113 { 1114 bus_space_tag_t buft = sc->sc_buft; 1115 bus_space_handle_t bufh = sc->sc_bufh; 1116 1117 /* 1118 * The byte count includes a 4 byte header that was added by 1119 * the NIC. 1120 */ 1121 hdrp->rsr = bus_space_read_1(buft, bufh, src); 1122 hdrp->next_packet = bus_space_read_1(buft, bufh, src + 1); 1123 hdrp->count = bus_space_read_1(buft, bufh, src + 2) | 1124 (bus_space_read_1(buft, bufh, src + 3) << 8); 1125 } 1126 1127 /* 1128 * Copy `amount' bytes from a packet in the ring buffer to a linear 1129 * destination buffer, given a source offset and destination address. 1130 * Takes into account ring-wrap. 1131 */ 1132 static int 1133 dp8390_ring_copy(struct dp8390_softc *sc, int src, void *dst, u_short amount) 1134 { 1135 bus_space_tag_t buft = sc->sc_buft; 1136 bus_space_handle_t bufh = sc->sc_bufh; 1137 u_short tmp_amount; 1138 1139 /* Does copy wrap to lower addr in ring buffer? */ 1140 if (src + amount > sc->mem_end) { 1141 tmp_amount = sc->mem_end - src; 1142 1143 /* Copy amount up to end of NIC memory. */ 1144 bus_space_read_region_1(buft, bufh, src, dst, tmp_amount); 1145 1146 amount -= tmp_amount; 1147 src = sc->mem_ring; 1148 dst = (char *)dst + tmp_amount; 1149 } 1150 bus_space_read_region_1(buft, bufh, src, dst, amount); 1151 1152 return src + amount; 1153 } 1154 1155 /* 1156 * Copy a packet from an mbuf to the transmit buffer on the card. 1157 * 1158 * Currently uses an extra buffer/extra memory copy, unless the whole 1159 * packet fits in one mbuf. 1160 */ 1161 static int 1162 dp8390_write_mbuf(struct dp8390_softc *sc, struct mbuf *m, int buf) 1163 { 1164 bus_space_tag_t buft = sc->sc_buft; 1165 bus_space_handle_t bufh = sc->sc_bufh; 1166 uint8_t *data; 1167 int len, totlen = 0; 1168 1169 for (; m ; m = m->m_next) { 1170 data = mtod(m, uint8_t *); 1171 len = m->m_len; 1172 if (len > 0) { 1173 bus_space_write_region_1(buft, bufh, buf, data, len); 1174 totlen += len; 1175 buf += len; 1176 } 1177 } 1178 if (totlen < ETHER_MIN_LEN - ETHER_CRC_LEN) { 1179 bus_space_set_region_1(buft, bufh, buf, 0, 1180 ETHER_MIN_LEN - ETHER_CRC_LEN - totlen); 1181 totlen = ETHER_MIN_LEN - ETHER_CRC_LEN; 1182 } 1183 return totlen; 1184 } 1185 1186 /* 1187 * Enable power on the interface. 1188 */ 1189 int 1190 dp8390_enable(struct dp8390_softc *sc) 1191 { 1192 1193 if (sc->sc_enabled == 0 && sc->sc_enable != NULL) { 1194 if ((*sc->sc_enable)(sc) != 0) { 1195 aprint_error_dev(sc->sc_dev, 1196 "device enable failed\n"); 1197 return EIO; 1198 } 1199 } 1200 1201 sc->sc_enabled = 1; 1202 return 0; 1203 } 1204 1205 /* 1206 * Disable power on the interface. 1207 */ 1208 void 1209 dp8390_disable(struct dp8390_softc *sc) 1210 { 1211 1212 if (sc->sc_enabled != 0 && sc->sc_disable != NULL) { 1213 (*sc->sc_disable)(sc); 1214 sc->sc_enabled = 0; 1215 } 1216 } 1217 1218 int 1219 dp8390_activate(device_t self, enum devact act) 1220 { 1221 struct dp8390_softc *sc = device_private(self); 1222 1223 switch (act) { 1224 case DVACT_DEACTIVATE: 1225 if_deactivate(&sc->sc_ec.ec_if); 1226 return 0; 1227 default: 1228 return EOPNOTSUPP; 1229 } 1230 } 1231 1232 int 1233 dp8390_detach(struct dp8390_softc *sc, int flags) 1234 { 1235 struct ifnet *ifp = &sc->sc_ec.ec_if; 1236 1237 /* Succeed now if there's no work to do. */ 1238 if ((sc->sc_flags & DP8390_ATTACHED) == 0) 1239 return 0; 1240 1241 /* dp8390_disable() checks sc->sc_enabled */ 1242 dp8390_disable(sc); 1243 1244 if (sc->sc_media_fini != NULL) 1245 (*sc->sc_media_fini)(sc); 1246 1247 /* Delete all remaining media. */ 1248 ifmedia_delete_instance(&sc->sc_media, IFM_INST_ANY); 1249 1250 rnd_detach_source(&sc->rnd_source); 1251 ether_ifdetach(ifp); 1252 if_detach(ifp); 1253 1254 return 0; 1255 } 1256 1257 #ifdef IPKDB_DP8390 1258 static void dp8390_ipkdb_hwinit(struct ipkdb_if *); 1259 static void dp8390_ipkdb_init(struct ipkdb_if *); 1260 static void dp8390_ipkdb_leave(struct ipkdb_if *); 1261 static int dp8390_ipkdb_rcv(struct ipkdb_if *, uint8_t *, int); 1262 static void dp8390_ipkdb_send(struct ipkdb_if *, uint8_t *, int); 1263 1264 /* 1265 * This is essentially similar to dp8390_config above. 1266 */ 1267 int 1268 dp8390_ipkdb_attach(struct ipkdb_if *kip) 1269 { 1270 struct dp8390_softc *sc = kip->port; 1271 1272 if (sc->mem_size < 8192 * 2) 1273 sc->txb_cnt = 1; 1274 else if (sc->mem_size < 8192 * 3) 1275 sc->txb_cnt = 2; 1276 else 1277 sc->txb_cnt = 3; 1278 1279 sc->tx_page_start = sc->mem_start >> ED_PAGE_SHIFT; 1280 sc->rec_page_start = sc->tx_page_start + sc->txb_cnt * ED_TXBUF_SIZE; 1281 sc->rec_page_stop = sc->tx_page_start + (sc->mem_size >> ED_PAGE_SHIFT); 1282 sc->mem_ring = sc->mem_start + 1283 ((sc->txb_cnt * ED_TXBUF_SIZE) << ED_PAGE_SHIFT); 1284 sc->mem_end = sc->mem_start + sc->mem_size; 1285 1286 dp8390_stop(sc); 1287 1288 kip->start = dp8390_ipkdb_init; 1289 kip->leave = dp8390_ipkdb_leave; 1290 kip->receive = dp8390_ipkdb_rcv; 1291 kip->send = dp8390_ipkdb_send; 1292 1293 return 0; 1294 } 1295 1296 /* 1297 * Similar to dp8390_init above. 1298 */ 1299 static void 1300 dp8390_ipkdb_hwinit(struct ipkdb_if *kip) 1301 { 1302 struct dp8390_softc *sc = kip->port; 1303 struct ifnet *ifp = &sc->sc_ec.ec_if; 1304 bus_space_tag_t regt = sc->sc_regt; 1305 bus_space_handle_t regh = sc->sc_regh; 1306 int i; 1307 1308 sc->txb_inuse = 0; 1309 sc->txb_new = 0; 1310 sc->txb_next_tx = 0; 1311 dp8390_stop(sc); 1312 1313 if (sc->dcr_reg & ED_DCR_LS) 1314 NIC_PUT(regt, regh, ED_P0_DCR, sc->dcr_reg); 1315 else 1316 NIC_PUT(regt, regh, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS); 1317 NIC_PUT(regt, regh, ED_P0_RBCR0, 0); 1318 NIC_PUT(regt, regh, ED_P0_RBCR1, 0); 1319 NIC_PUT(regt, regh, ED_P0_RCR, ED_RCR_MON | sc->rcr_proto); 1320 NIC_PUT(regt, regh, ED_P0_TCR, ED_TCR_LB0); 1321 if (sc->is790) 1322 NIC_PUT(regt, regh, 0x09, 0); 1323 NIC_PUT(regt, regh, ED_P0_BNRY, sc->rec_page_start); 1324 NIC_PUT(regt, regh, ED_P0_PSTART, sc->rec_page_start); 1325 NIC_PUT(regt, regh, ED_P0_PSTOP, sc->rec_page_stop); 1326 NIC_PUT(regt, regh, ED_P0_IMR, 0); 1327 NIC_BARRIER(regt, regh); 1328 NIC_PUT(regt, regh, ED_P0_ISR, 0xff); 1329 1330 NIC_BARRIER(regt, regh); 1331 NIC_PUT(regt, regh, ED_P0_CR, 1332 sc->cr_proto | ED_CR_PAGE_1 | ED_CR_STP); 1333 NIC_BARRIER(regt, regh); 1334 1335 for (i = 0; i < sizeof kip->myenetaddr; i++) 1336 NIC_PUT(regt, regh, ED_P1_PAR0 + i, kip->myenetaddr[i]); 1337 /* multicast filter? */ 1338 1339 sc->next_packet = sc->rec_page_start + 1; 1340 NIC_PUT(regt, regh, ED_P1_CURR, sc->next_packet); 1341 1342 NIC_BARRIER(regt, regh); 1343 NIC_PUT(regt, regh, ED_P1_CR, 1344 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STP); 1345 NIC_BARRIER(regt, regh); 1346 1347 /* promiscuous mode? */ 1348 NIC_PUT(regt, regh, ED_P0_RCR, ED_RCR_AB | ED_RCR_AM | sc->rcr_proto); 1349 NIC_PUT(regt, regh, ED_P0_TCR, 0); 1350 1351 /* card-specific initialization? */ 1352 1353 NIC_BARRIER(regt, regh); 1354 NIC_PUT(regt, regh, ED_P0_CR, 1355 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); 1356 1357 ifp->if_flags &= ~IFF_OACTIVE; 1358 } 1359 1360 static void 1361 dp8390_ipkdb_init(struct ipkdb_if *kip) 1362 { 1363 struct dp8390_softc *sc = kip->port; 1364 bus_space_tag_t regt = sc->sc_regt; 1365 bus_space_handle_t regh = sc->sc_regh; 1366 uint8_t cmd; 1367 1368 cmd = NIC_GET(regt, regh, ED_P0_CR) & ~(ED_CR_PAGE_3 | ED_CR_STA); 1369 1370 /* Select page 0 */ 1371 NIC_BARRIER(regt, regh); 1372 NIC_PUT(regt, regh, ED_P0_CR, cmd | ED_CR_PAGE_0 | ED_CR_STP); 1373 NIC_BARRIER(regt, regh); 1374 1375 /* If not started, init chip */ 1376 if ((cmd & ED_CR_STP) != 0) 1377 dp8390_ipkdb_hwinit(kip); 1378 1379 /* If output active, wait for packets to drain */ 1380 while (sc->txb_inuse) { 1381 while ((cmd = (NIC_GET(regt, regh, ED_P0_ISR) & 1382 (ED_ISR_PTX | ED_ISR_TXE))) == 0) 1383 DELAY(1); 1384 NIC_PUT(regt, regh, ED_P0_ISR, cmd); 1385 if (--sc->txb_inuse) 1386 dp8390_xmit(sc); 1387 } 1388 } 1389 1390 static void 1391 dp8390_ipkdb_leave(struct ipkdb_if *kip) 1392 { 1393 struct dp8390_softc *sc = kip->port; 1394 struct ifnet *ifp = &sc->sc_ec.ec_if; 1395 1396 ifp->if_timer = 0; 1397 } 1398 1399 /* 1400 * Similar to dp8390_intr above. 1401 */ 1402 static int 1403 dp8390_ipkdb_rcv(struct ipkdb_if *kip, uint8_t *buf, int poll) 1404 { 1405 struct dp8390_softc *sc = kip->port; 1406 bus_space_tag_t regt = sc->sc_regt; 1407 bus_space_handle_t regh = sc->sc_regh; 1408 uint8_t bnry, current, isr; 1409 int len, nlen, packet_ptr; 1410 struct dp8390_ring packet_hdr; 1411 1412 /* Switch to page 0. */ 1413 NIC_BARRIER(regt, regh); 1414 NIC_PUT(regt, regh, ED_P0_CR, 1415 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); 1416 NIC_BARRIER(regt, regh); 1417 1418 for (;;) { 1419 isr = NIC_GET(regt, regh, ED_P0_ISR); 1420 NIC_PUT(regt, regh, ED_P0_ISR, isr); 1421 1422 if (isr & (ED_ISR_PRX | ED_ISR_TXE)) { 1423 NIC_GET(regt, regh, ED_P0_NCR); 1424 NIC_GET(regt, regh, ED_P0_TSR); 1425 } 1426 1427 if (isr & ED_ISR_OVW) { 1428 dp8390_ipkdb_hwinit(kip); 1429 continue; 1430 } 1431 1432 if (isr & ED_ISR_CNT) { 1433 NIC_GET(regt, regh, ED_P0_CNTR0); 1434 NIC_GET(regt, regh, ED_P0_CNTR1); 1435 NIC_GET(regt, regh, ED_P0_CNTR2); 1436 } 1437 1438 /* Similar to dp8390_rint above. */ 1439 NIC_BARRIER(regt, regh); 1440 NIC_PUT(regt, regh, ED_P0_CR, 1441 sc->cr_proto | ED_CR_PAGE_1 | ED_CR_STA); 1442 NIC_BARRIER(regt, regh); 1443 1444 current = NIC_GET(regt, regh, ED_P1_CURR); 1445 1446 NIC_BARRIER(regt, regh); 1447 NIC_PUT(regt, regh, ED_P1_CR, 1448 sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); 1449 NIC_BARRIER(regt, regh); 1450 1451 if (sc->next_packet == current) { 1452 if (poll) 1453 return 0; 1454 continue; 1455 } 1456 1457 packet_ptr = sc->mem_ring + 1458 ((sc->next_packet - sc->rec_page_start) << ED_PAGE_SHIFT); 1459 sc->read_hdr(sc, packet_ptr, &packet_hdr); 1460 len = packet_hdr.count; 1461 nlen = packet_hdr.next_packet - sc->next_packet; 1462 if (nlen < 0) 1463 nlen += sc->rec_page_stop - sc->rec_page_start; 1464 nlen--; 1465 if ((len & ED_PAGE_MASK) + sizeof(packet_hdr) > ED_PAGE_SIZE) 1466 nlen--; 1467 len = (len & ED_PAGE_MASK) | (nlen << ED_PAGE_SHIFT); 1468 len -= sizeof(packet_hdr); 1469 1470 if (len <= ETHERMTU && 1471 packet_hdr.next_packet >= sc->rec_page_start && 1472 packet_hdr.next_packet < sc->rec_page_stop) { 1473 sc->ring_copy(sc, packet_ptr + sizeof(packet_hdr), 1474 buf, len); 1475 sc->next_packet = packet_hdr.next_packet; 1476 bnry = sc->next_packet - 1; 1477 if (bnry < sc->rec_page_start) 1478 bnry = sc->rec_page_stop - 1; 1479 NIC_PUT(regt, regh, ED_P0_BNRY, bnry); 1480 return len; 1481 } 1482 1483 dp8390_ipkdb_hwinit(kip); 1484 } 1485 } 1486 1487 static void 1488 dp8390_ipkdb_send(struct ipkdb_if *kip, uint8_t *buf, int l) 1489 { 1490 struct dp8390_softc *sc = kip->port; 1491 bus_space_tag_t regt = sc->sc_regt; 1492 bus_space_handle_t regh = sc->sc_regh; 1493 struct mbuf mb; 1494 1495 mb.m_next = NULL; 1496 mb.m_pkthdr.len = mb.m_len = l; 1497 mb.m_data = buf; 1498 mb.m_flags = M_EXT | M_PKTHDR; 1499 mb.m_type = MT_DATA; 1500 1501 l = sc->write_mbuf(sc, &mb, 1502 sc->mem_start + ((sc->txb_new * ED_TXBUF_SIZE) << ED_PAGE_SHIFT)); 1503 sc->txb_len[sc->txb_new] = max(l, ETHER_MIN_LEN - ETHER_CRC_LEN); 1504 1505 if (++sc->txb_new == sc->txb_cnt) 1506 sc->txb_new = 0; 1507 1508 sc->txb_inuse++; 1509 dp8390_xmit(sc); 1510 1511 while ((NIC_GET(regt, regh, ED_P0_ISR) & 1512 (ED_ISR_PTX | ED_ISR_TXE)) == 0) 1513 DELAY(1); 1514 1515 sc->txb_inuse--; 1516 } 1517 #endif 1518