Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/vx/if_vx.c
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1 /*- 2 * Copyright (c) 1994 Herb Peyerl <hpeyerl@novatel.ca> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Herb Peyerl. 16 * 4. The name of Herb Peyerl may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 * 30 * 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 /* 37 * Created from if_ep.c driver by Fred Gray (fgray@rice.edu) to support 38 * the 3c590 family. 39 */ 40 41 /* 42 * Modified from the FreeBSD 1.1.5.1 version by: 43 * Andres Vega Garcia 44 * INRIA - Sophia Antipolis, France 45 * avega@sophia.inria.fr 46 */ 47 48 /* 49 * Promiscuous mode added and interrupt logic slightly changed 50 * to reduce the number of adapter failures. Transceiver select 51 * logic changed to use value from EEPROM. Autoconfiguration 52 * features added. 53 * Done by: 54 * Serge Babkin 55 * Chelindbank (Chelyabinsk, Russia) 56 * babkin@hq.icb.chel.su 57 */ 58 59 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/sockio.h> 63 #include <sys/kernel.h> 64 #include <sys/malloc.h> 65 #include <sys/mbuf.h> 66 #include <sys/socket.h> 67 68 #include <net/if.h> 69 #include <net/if_var.h> 70 71 #include <net/ethernet.h> 72 #include <net/if_dl.h> 73 #include <net/if_types.h> 74 75 #include <machine/bus.h> 76 77 #include <sys/bus.h> 78 79 #include <net/bpf.h> 80 81 #include <dev/vx/if_vxreg.h> 82 #include <dev/vx/if_vxvar.h> 83 84 #define ETHER_MAX_LEN 1518 85 #define ETHER_ADDR_LEN 6 86 #define ETHER_ALIGN 2 87 88 static struct connector_entry { 89 int bit; 90 char *name; 91 } conn_tab[VX_CONNECTORS] = { 92 93 #define CONNECTOR_UTP 0 94 { 95 0x08, "utp" 96 }, 97 #define CONNECTOR_AUI 1 98 { 99 0x20, "aui" 100 }, 101 /* dummy */ 102 { 103 0, "???" 104 }, 105 #define CONNECTOR_BNC 3 106 { 107 0x10, "bnc" 108 }, 109 #define CONNECTOR_TX 4 110 { 111 0x02, "tx" 112 }, 113 #define CONNECTOR_FX 5 114 { 115 0x04, "fx" 116 }, 117 #define CONNECTOR_MII 6 118 { 119 0x40, "mii" 120 }, 121 { 122 0, "???" 123 } 124 }; 125 126 static void vx_txstat(struct vx_softc *); 127 static int vx_status(struct vx_softc *); 128 static void vx_init(void *); 129 static void vx_init_locked(struct vx_softc *); 130 static int vx_ioctl(struct ifnet *, u_long, caddr_t); 131 static void vx_start(struct ifnet *); 132 static void vx_start_locked(struct ifnet *); 133 static void vx_watchdog(void *); 134 static void vx_reset(struct vx_softc *); 135 static void vx_read(struct vx_softc *); 136 static struct mbuf *vx_get(struct vx_softc *, u_int); 137 static void vx_mbuf_fill(void *); 138 static void vx_mbuf_empty(struct vx_softc *); 139 static void vx_setfilter(struct vx_softc *); 140 static void vx_getlink(struct vx_softc *); 141 static void vx_setlink(struct vx_softc *); 142 143 int 144 vx_attach(device_t dev) 145 { 146 struct vx_softc *sc = device_get_softc(dev); 147 struct ifnet *ifp; 148 int i; 149 u_char eaddr[6]; 150 151 ifp = sc->vx_ifp = if_alloc(IFT_ETHER); 152 if (ifp == NULL) { 153 device_printf(dev, "can not if_alloc()\n"); 154 return 0; 155 } 156 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 157 158 mtx_init(&sc->vx_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK, 159 MTX_DEF); 160 callout_init_mtx(&sc->vx_callout, &sc->vx_mtx, 0); 161 callout_init_mtx(&sc->vx_watchdog, &sc->vx_mtx, 0); 162 GO_WINDOW(0); 163 CSR_WRITE_2(sc, VX_COMMAND, GLOBAL_RESET); 164 VX_BUSY_WAIT; 165 166 vx_getlink(sc); 167 168 /* 169 * Read the station address from the eeprom 170 */ 171 GO_WINDOW(0); 172 for (i = 0; i < 3; i++) { 173 int x; 174 175 if (vx_busy_eeprom(sc)) { 176 mtx_destroy(&sc->vx_mtx); 177 if_free(ifp); 178 return 0; 179 } 180 CSR_WRITE_2(sc, VX_W0_EEPROM_COMMAND, EEPROM_CMD_RD 181 | (EEPROM_OEM_ADDR0 + i)); 182 if (vx_busy_eeprom(sc)) { 183 mtx_destroy(&sc->vx_mtx); 184 if_free(ifp); 185 return 0; 186 } 187 x = CSR_READ_2(sc, VX_W0_EEPROM_DATA); 188 eaddr[(i << 1)] = x >> 8; 189 eaddr[(i << 1) + 1] = x; 190 } 191 192 ifp->if_snd.ifq_maxlen = ifqmaxlen; 193 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 194 ifp->if_start = vx_start; 195 ifp->if_ioctl = vx_ioctl; 196 ifp->if_init = vx_init; 197 ifp->if_softc = sc; 198 199 ether_ifattach(ifp, eaddr); 200 201 sc->vx_tx_start_thresh = 20; /* probably a good starting point. */ 202 203 VX_LOCK(sc); 204 vx_stop(sc); 205 VX_UNLOCK(sc); 206 207 gone_by_fcp101_dev(dev); 208 209 return 1; 210 } 211 212 /* 213 * The order in here seems important. Otherwise we may not receive 214 * interrupts. ?! 215 */ 216 static void 217 vx_init(void *xsc) 218 { 219 struct vx_softc *sc = (struct vx_softc *)xsc; 220 221 VX_LOCK(sc); 222 vx_init_locked(sc); 223 VX_UNLOCK(sc); 224 } 225 226 static void 227 vx_init_locked(struct vx_softc *sc) 228 { 229 struct ifnet *ifp = sc->vx_ifp; 230 int i; 231 232 VX_LOCK_ASSERT(sc); 233 234 VX_BUSY_WAIT; 235 236 GO_WINDOW(2); 237 238 for (i = 0; i < 6; i++) /* Reload the ether_addr. */ 239 CSR_WRITE_1(sc, VX_W2_ADDR_0 + i, IF_LLADDR(sc->vx_ifp)[i]); 240 241 CSR_WRITE_2(sc, VX_COMMAND, RX_RESET); 242 VX_BUSY_WAIT; 243 CSR_WRITE_2(sc, VX_COMMAND, TX_RESET); 244 VX_BUSY_WAIT; 245 246 GO_WINDOW(1); /* Window 1 is operating window */ 247 for (i = 0; i < 31; i++) 248 CSR_READ_1(sc, VX_W1_TX_STATUS); 249 250 CSR_WRITE_2(sc, VX_COMMAND, SET_RD_0_MASK | S_CARD_FAILURE | 251 S_RX_COMPLETE | S_TX_COMPLETE | S_TX_AVAIL); 252 CSR_WRITE_2(sc, VX_COMMAND, SET_INTR_MASK | S_CARD_FAILURE | 253 S_RX_COMPLETE | S_TX_COMPLETE | S_TX_AVAIL); 254 255 /* 256 * Attempt to get rid of any stray interrupts that occurred during 257 * configuration. On the i386 this isn't possible because one may 258 * already be queued. However, a single stray interrupt is 259 * unimportant. 260 */ 261 CSR_WRITE_2(sc, VX_COMMAND, ACK_INTR | 0xff); 262 263 vx_setfilter(sc); 264 vx_setlink(sc); 265 266 CSR_WRITE_2(sc, VX_COMMAND, RX_ENABLE); 267 CSR_WRITE_2(sc, VX_COMMAND, TX_ENABLE); 268 269 vx_mbuf_fill(sc); 270 271 /* Interface is now `running', with no output active. */ 272 ifp->if_drv_flags |= IFF_DRV_RUNNING; 273 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 274 callout_reset(&sc->vx_watchdog, hz, vx_watchdog, sc); 275 276 /* Attempt to start output, if any. */ 277 vx_start_locked(ifp); 278 } 279 280 static void 281 vx_setfilter(struct vx_softc *sc) 282 { 283 struct ifnet *ifp = sc->vx_ifp; 284 285 VX_LOCK_ASSERT(sc); 286 GO_WINDOW(1); /* Window 1 is operating window */ 287 CSR_WRITE_2(sc, VX_COMMAND, SET_RX_FILTER | 288 FIL_INDIVIDUAL | FIL_BRDCST | FIL_MULTICAST | 289 ((ifp->if_flags & IFF_PROMISC) ? FIL_PROMISC : 0)); 290 } 291 292 static void 293 vx_getlink(struct vx_softc *sc) 294 { 295 int n, k; 296 297 GO_WINDOW(3); 298 sc->vx_connectors = CSR_READ_2(sc, VX_W3_RESET_OPT) & 0x7f; 299 for (n = 0, k = 0; k < VX_CONNECTORS; k++) { 300 if (sc->vx_connectors & conn_tab[k].bit) { 301 if (n > 0) 302 printf("/"); 303 printf("%s", conn_tab[k].name); 304 n++; 305 } 306 } 307 if (sc->vx_connectors == 0) { 308 printf("no connectors!\n"); 309 return; 310 } 311 GO_WINDOW(3); 312 sc->vx_connector = 313 (CSR_READ_4(sc, VX_W3_INTERNAL_CFG) & INTERNAL_CONNECTOR_MASK) 314 >> INTERNAL_CONNECTOR_BITS; 315 if (sc->vx_connector & 0x10) { 316 sc->vx_connector &= 0x0f; 317 printf("[*%s*]", conn_tab[(int)sc->vx_connector].name); 318 printf(": disable 'auto select' with DOS util!\n"); 319 } else { 320 printf("[*%s*]\n", conn_tab[(int)sc->vx_connector].name); 321 } 322 } 323 324 static void 325 vx_setlink(struct vx_softc *sc) 326 { 327 struct ifnet *ifp = sc->vx_ifp; 328 int i, j, k; 329 char *reason, *warning; 330 static int prev_flags; 331 static signed char prev_conn = -1; 332 333 VX_LOCK_ASSERT(sc); 334 if (prev_conn == -1) 335 prev_conn = sc->vx_connector; 336 337 /* 338 * S.B. 339 * 340 * Now behavior was slightly changed: 341 * 342 * if any of flags link[0-2] is used and its connector is 343 * physically present the following connectors are used: 344 * 345 * link0 - AUI * highest precedence 346 * link1 - BNC 347 * link2 - UTP * lowest precedence 348 * 349 * If none of them is specified then 350 * connector specified in the EEPROM is used 351 * (if present on card or UTP if not). 352 */ 353 i = sc->vx_connector; /* default in EEPROM */ 354 reason = "default"; 355 warning = NULL; 356 357 if (ifp->if_flags & IFF_LINK0) { 358 if (sc->vx_connectors & conn_tab[CONNECTOR_AUI].bit) { 359 i = CONNECTOR_AUI; 360 reason = "link0"; 361 } else { 362 warning = "aui not present! (link0)"; 363 } 364 } else if (ifp->if_flags & IFF_LINK1) { 365 if (sc->vx_connectors & conn_tab[CONNECTOR_BNC].bit) { 366 i = CONNECTOR_BNC; 367 reason = "link1"; 368 } else { 369 warning = "bnc not present! (link1)"; 370 } 371 } else if (ifp->if_flags & IFF_LINK2) { 372 if (sc->vx_connectors & conn_tab[CONNECTOR_UTP].bit) { 373 i = CONNECTOR_UTP; 374 reason = "link2"; 375 } else { 376 warning = "utp not present! (link2)"; 377 } 378 } else if ((sc->vx_connectors & conn_tab[(int)sc->vx_connector].bit) == 0) { 379 warning = "strange connector type in EEPROM."; 380 reason = "forced"; 381 i = CONNECTOR_UTP; 382 } 383 /* Avoid unnecessary message. */ 384 k = (prev_flags ^ ifp->if_flags) & (IFF_LINK0 | IFF_LINK1 | IFF_LINK2); 385 if ((k != 0) || (prev_conn != i)) { 386 if (warning != NULL) 387 if_printf(ifp, "warning: %s\n", warning); 388 if_printf(ifp, "selected %s. (%s)\n", conn_tab[i].name, reason); 389 } 390 /* Set the selected connector. */ 391 GO_WINDOW(3); 392 j = CSR_READ_4(sc, VX_W3_INTERNAL_CFG) & ~INTERNAL_CONNECTOR_MASK; 393 CSR_WRITE_4(sc, VX_W3_INTERNAL_CFG, j | (i << INTERNAL_CONNECTOR_BITS)); 394 395 /* First, disable all. */ 396 CSR_WRITE_2(sc, VX_COMMAND, STOP_TRANSCEIVER); 397 DELAY(800); 398 GO_WINDOW(4); 399 CSR_WRITE_2(sc, VX_W4_MEDIA_TYPE, 0); 400 401 /* Second, enable the selected one. */ 402 switch (i) { 403 case CONNECTOR_UTP: 404 GO_WINDOW(4); 405 CSR_WRITE_2(sc, VX_W4_MEDIA_TYPE, ENABLE_UTP); 406 break; 407 case CONNECTOR_BNC: 408 CSR_WRITE_2(sc, VX_COMMAND, START_TRANSCEIVER); 409 DELAY(800); 410 break; 411 case CONNECTOR_TX: 412 case CONNECTOR_FX: 413 GO_WINDOW(4); 414 CSR_WRITE_2(sc, VX_W4_MEDIA_TYPE, LINKBEAT_ENABLE); 415 break; 416 default: /* AUI and MII fall here */ 417 break; 418 } 419 GO_WINDOW(1); 420 421 prev_flags = ifp->if_flags; 422 prev_conn = i; 423 } 424 425 static void 426 vx_start(struct ifnet *ifp) 427 { 428 struct vx_softc *sc = ifp->if_softc; 429 430 VX_LOCK(sc); 431 vx_start_locked(ifp); 432 VX_UNLOCK(sc); 433 } 434 435 static void 436 vx_start_locked(struct ifnet *ifp) 437 { 438 struct vx_softc *sc = ifp->if_softc; 439 struct mbuf *m; 440 int len, pad; 441 442 VX_LOCK_ASSERT(sc); 443 444 /* Don't transmit if interface is busy or not running */ 445 if ((sc->vx_ifp->if_drv_flags & 446 (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) != IFF_DRV_RUNNING) 447 return; 448 449 startagain: 450 /* Sneak a peek at the next packet */ 451 m = ifp->if_snd.ifq_head; 452 if (m == NULL) { 453 return; 454 } 455 /* We need to use m->m_pkthdr.len, so require the header */ 456 M_ASSERTPKTHDR(m); 457 len = m->m_pkthdr.len; 458 459 pad = (4 - len) & 3; 460 461 /* 462 * The 3c509 automatically pads short packets to minimum ethernet 463 * length, but we drop packets that are too large. Perhaps we should 464 * truncate them instead? 465 */ 466 if (len + pad > ETHER_MAX_LEN) { 467 /* packet is obviously too large: toss it */ 468 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 469 IF_DEQUEUE(&ifp->if_snd, m); 470 m_freem(m); 471 goto readcheck; 472 } 473 VX_BUSY_WAIT; 474 if (CSR_READ_2(sc, VX_W1_FREE_TX) < len + pad + 4) { 475 CSR_WRITE_2(sc, VX_COMMAND, 476 SET_TX_AVAIL_THRESH | ((len + pad + 4) >> 2)); 477 /* not enough room in FIFO - make sure */ 478 if (CSR_READ_2(sc, VX_W1_FREE_TX) < len + pad + 4) { 479 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 480 sc->vx_timer = 1; 481 return; 482 } 483 } 484 CSR_WRITE_2(sc, VX_COMMAND, SET_TX_AVAIL_THRESH | (8188 >> 2)); 485 IF_DEQUEUE(&ifp->if_snd, m); 486 if (m == NULL) /* not really needed */ 487 return; 488 489 VX_BUSY_WAIT; 490 CSR_WRITE_2(sc, VX_COMMAND, SET_TX_START_THRESH | 491 ((len / 4 + sc->vx_tx_start_thresh) >> 2)); 492 493 BPF_MTAP(sc->vx_ifp, m); 494 495 /* 496 * Do the output at splhigh() so that an interrupt from another device 497 * won't cause a FIFO underrun. 498 * 499 * XXX: Can't enforce that anymore. 500 */ 501 502 CSR_WRITE_4(sc, VX_W1_TX_PIO_WR_1, len | TX_INDICATE); 503 504 while (m) { 505 if (m->m_len > 3) 506 bus_space_write_multi_4(sc->vx_bst, sc->vx_bsh, 507 VX_W1_TX_PIO_WR_1, (u_int32_t *)mtod(m, caddr_t), 508 m->m_len / 4); 509 if (m->m_len & 3) 510 bus_space_write_multi_1(sc->vx_bst, sc->vx_bsh, 511 VX_W1_TX_PIO_WR_1, 512 mtod(m, caddr_t) + (m->m_len & ~3), m->m_len & 3); 513 m = m_free(m); 514 } 515 while (pad--) 516 CSR_WRITE_1(sc, VX_W1_TX_PIO_WR_1, 0); /* Padding */ 517 518 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 519 sc->vx_timer = 1; 520 521 readcheck: 522 if ((CSR_READ_2(sc, VX_W1_RX_STATUS) & ERR_INCOMPLETE) == 0) { 523 /* We received a complete packet. */ 524 525 if ((CSR_READ_2(sc, VX_STATUS) & S_INTR_LATCH) == 0) { 526 /* 527 * No interrupt, read the packet and continue 528 * Is this supposed to happen? Is my motherboard 529 * completely busted? 530 */ 531 vx_read(sc); 532 } else 533 /* 534 * Got an interrupt, return so that it gets 535 * serviced. 536 */ 537 return; 538 } else { 539 /* Check if we are stuck and reset [see XXX comment] */ 540 if (vx_status(sc)) { 541 if (ifp->if_flags & IFF_DEBUG) 542 if_printf(ifp, "adapter reset\n"); 543 vx_reset(sc); 544 } 545 } 546 547 goto startagain; 548 } 549 550 /* 551 * XXX: The 3c509 card can get in a mode where both the fifo status bit 552 * FIFOS_RX_OVERRUN and the status bit ERR_INCOMPLETE are set 553 * We detect this situation and we reset the adapter. 554 * It happens at times when there is a lot of broadcast traffic 555 * on the cable (once in a blue moon). 556 */ 557 static int 558 vx_status(struct vx_softc *sc) 559 { 560 struct ifnet *ifp; 561 int fifost; 562 563 VX_LOCK_ASSERT(sc); 564 565 /* 566 * Check the FIFO status and act accordingly 567 */ 568 GO_WINDOW(4); 569 fifost = CSR_READ_2(sc, VX_W4_FIFO_DIAG); 570 GO_WINDOW(1); 571 572 ifp = sc->vx_ifp; 573 if (fifost & FIFOS_RX_UNDERRUN) { 574 if (ifp->if_flags & IFF_DEBUG) 575 if_printf(ifp, "RX underrun\n"); 576 vx_reset(sc); 577 return 0; 578 } 579 if (fifost & FIFOS_RX_STATUS_OVERRUN) { 580 if (ifp->if_flags & IFF_DEBUG) 581 if_printf(ifp, "RX Status overrun\n"); 582 return 1; 583 } 584 if (fifost & FIFOS_RX_OVERRUN) { 585 if (ifp->if_flags & IFF_DEBUG) 586 if_printf(ifp, "RX overrun\n"); 587 return 1; 588 } 589 if (fifost & FIFOS_TX_OVERRUN) { 590 if (ifp->if_flags & IFF_DEBUG) 591 if_printf(ifp, "TX overrun\n"); 592 vx_reset(sc); 593 return 0; 594 } 595 return 0; 596 } 597 598 static void 599 vx_txstat(struct vx_softc *sc) 600 { 601 struct ifnet *ifp; 602 int i; 603 604 VX_LOCK_ASSERT(sc); 605 606 /* 607 * We need to read+write TX_STATUS until we get a 0 status 608 * in order to turn off the interrupt flag. 609 */ 610 ifp = sc->vx_ifp; 611 while ((i = CSR_READ_1(sc, VX_W1_TX_STATUS)) & TXS_COMPLETE) { 612 CSR_WRITE_1(sc, VX_W1_TX_STATUS, 0x0); 613 614 if (i & TXS_JABBER) { 615 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 616 if (ifp->if_flags & IFF_DEBUG) 617 if_printf(ifp, "jabber (%x)\n", i); 618 vx_reset(sc); 619 } else if (i & TXS_UNDERRUN) { 620 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 621 if (ifp->if_flags & IFF_DEBUG) 622 if_printf(ifp, "fifo underrun (%x) @%d\n", i, 623 sc->vx_tx_start_thresh); 624 if (sc->vx_tx_succ_ok < 100) 625 sc->vx_tx_start_thresh = 626 min(ETHER_MAX_LEN, 627 sc->vx_tx_start_thresh + 20); 628 sc->vx_tx_succ_ok = 0; 629 vx_reset(sc); 630 } else if (i & TXS_MAX_COLLISION) { 631 if_inc_counter(ifp, IFCOUNTER_COLLISIONS, 1); 632 CSR_WRITE_2(sc, VX_COMMAND, TX_ENABLE); 633 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 634 } else 635 sc->vx_tx_succ_ok = (sc->vx_tx_succ_ok + 1) & 127; 636 } 637 } 638 639 void 640 vx_intr(void *voidsc) 641 { 642 short status; 643 struct vx_softc *sc = voidsc; 644 struct ifnet *ifp = sc->vx_ifp; 645 646 VX_LOCK(sc); 647 for (;;) { 648 CSR_WRITE_2(sc, VX_COMMAND, C_INTR_LATCH); 649 650 status = CSR_READ_2(sc, VX_STATUS); 651 652 if ((status & (S_TX_COMPLETE | S_TX_AVAIL | 653 S_RX_COMPLETE | S_CARD_FAILURE)) == 0) 654 break; 655 656 /* 657 * Acknowledge any interrupts. It's important that we do this 658 * first, since there would otherwise be a race condition. 659 * Due to the i386 interrupt queueing, we may get spurious 660 * interrupts occasionally. 661 */ 662 CSR_WRITE_2(sc, VX_COMMAND, ACK_INTR | status); 663 664 if (status & S_RX_COMPLETE) 665 vx_read(sc); 666 if (status & S_TX_AVAIL) { 667 sc->vx_timer = 0; 668 sc->vx_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 669 vx_start_locked(sc->vx_ifp); 670 } 671 if (status & S_CARD_FAILURE) { 672 if_printf(ifp, "adapter failure (%x)\n", status); 673 sc->vx_timer = 0; 674 vx_reset(sc); 675 break; 676 } 677 if (status & S_TX_COMPLETE) { 678 sc->vx_timer = 0; 679 vx_txstat(sc); 680 vx_start_locked(ifp); 681 } 682 } 683 VX_UNLOCK(sc); 684 685 /* no more interrupts */ 686 return; 687 } 688 689 static void 690 vx_read(struct vx_softc *sc) 691 { 692 struct ifnet *ifp = sc->vx_ifp; 693 struct mbuf *m; 694 struct ether_header *eh; 695 u_int len; 696 697 VX_LOCK_ASSERT(sc); 698 len = CSR_READ_2(sc, VX_W1_RX_STATUS); 699 again: 700 701 if (ifp->if_flags & IFF_DEBUG) { 702 int err = len & ERR_MASK; 703 char *s = NULL; 704 705 if (len & ERR_INCOMPLETE) 706 s = "incomplete packet"; 707 else if (err == ERR_OVERRUN) 708 s = "packet overrun"; 709 else if (err == ERR_RUNT) 710 s = "runt packet"; 711 else if (err == ERR_ALIGNMENT) 712 s = "bad alignment"; 713 else if (err == ERR_CRC) 714 s = "bad crc"; 715 else if (err == ERR_OVERSIZE) 716 s = "oversized packet"; 717 else if (err == ERR_DRIBBLE) 718 s = "dribble bits"; 719 720 if (s) 721 if_printf(ifp, "%s\n", s); 722 } 723 if (len & ERR_INCOMPLETE) 724 return; 725 726 if (len & ERR_RX) { 727 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 728 goto abort; 729 } 730 len &= RX_BYTES_MASK; /* Lower 11 bits = RX bytes. */ 731 732 /* Pull packet off interface. */ 733 m = vx_get(sc, len); 734 if (m == NULL) { 735 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 736 goto abort; 737 } 738 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); 739 740 { 741 struct mbuf *m0; 742 743 m0 = m_devget(mtod(m, char *), m->m_pkthdr.len, ETHER_ALIGN, 744 ifp, NULL); 745 if (m0 == NULL) { 746 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 747 goto abort; 748 } 749 m_freem(m); 750 m = m0; 751 } 752 753 /* We assume the header fit entirely in one mbuf. */ 754 eh = mtod(m, struct ether_header *); 755 756 /* 757 * XXX: Some cards seem to be in promiscuous mode all the time. 758 * we need to make sure we only get our own stuff always. 759 * bleah! 760 */ 761 762 if (!(ifp->if_flags & IFF_PROMISC) 763 && (eh->ether_dhost[0] & 1) == 0 /* !mcast and !bcast */ 764 && bcmp(eh->ether_dhost, IF_LLADDR(sc->vx_ifp), 765 ETHER_ADDR_LEN) != 0) { 766 m_freem(m); 767 return; 768 } 769 VX_UNLOCK(sc); 770 (*ifp->if_input)(ifp, m); 771 VX_LOCK(sc); 772 773 /* 774 * In periods of high traffic we can actually receive enough 775 * packets so that the fifo overrun bit will be set at this point, 776 * even though we just read a packet. In this case we 777 * are not going to receive any more interrupts. We check for 778 * this condition and read again until the fifo is not full. 779 * We could simplify this test by not using vx_status(), but 780 * rechecking the RX_STATUS register directly. This test could 781 * result in unnecessary looping in cases where there is a new 782 * packet but the fifo is not full, but it will not fix the 783 * stuck behavior. 784 * 785 * Even with this improvement, we still get packet overrun errors 786 * which are hurting performance. Maybe when I get some more time 787 * I'll modify vx_read() so that it can handle RX_EARLY interrupts. 788 */ 789 if (vx_status(sc)) { 790 len = CSR_READ_2(sc, VX_W1_RX_STATUS); 791 /* Check if we are stuck and reset [see XXX comment] */ 792 if (len & ERR_INCOMPLETE) { 793 if (ifp->if_flags & IFF_DEBUG) 794 if_printf(ifp, "adapter reset\n"); 795 vx_reset(sc); 796 return; 797 } 798 goto again; 799 } 800 return; 801 802 abort: 803 CSR_WRITE_2(sc, VX_COMMAND, RX_DISCARD_TOP_PACK); 804 } 805 806 static struct mbuf * 807 vx_get(struct vx_softc *sc, u_int totlen) 808 { 809 struct ifnet *ifp = sc->vx_ifp; 810 struct mbuf *top, **mp, *m; 811 int len; 812 813 VX_LOCK_ASSERT(sc); 814 m = sc->vx_mb[sc->vx_next_mb]; 815 sc->vx_mb[sc->vx_next_mb] = NULL; 816 if (m == NULL) { 817 MGETHDR(m, M_NOWAIT, MT_DATA); 818 if (m == NULL) 819 return NULL; 820 } else { 821 /* If the queue is no longer full, refill. */ 822 if (sc->vx_last_mb == sc->vx_next_mb && 823 sc->vx_buffill_pending == 0) { 824 callout_reset(&sc->vx_callout, hz / 100, vx_mbuf_fill, 825 sc); 826 sc->vx_buffill_pending = 1; 827 } 828 /* Convert one of our saved mbuf's. */ 829 sc->vx_next_mb = (sc->vx_next_mb + 1) % MAX_MBS; 830 m->m_data = m->m_pktdat; 831 m->m_flags = M_PKTHDR; 832 bzero(&m->m_pkthdr, sizeof(m->m_pkthdr)); 833 } 834 m->m_pkthdr.rcvif = ifp; 835 m->m_pkthdr.len = totlen; 836 len = MHLEN; 837 top = NULL; 838 mp = ⊤ 839 840 /* 841 * We read the packet at splhigh() so that an interrupt from another 842 * device doesn't cause the card's buffer to overflow while we're 843 * reading it. We may still lose packets at other times. 844 * 845 * XXX: Can't enforce this anymore. 846 */ 847 848 /* 849 * Since we don't set allowLargePackets bit in MacControl register, 850 * we can assume that totlen <= 1500bytes. 851 * The while loop will be performed iff we have a packet with 852 * MLEN < m_len < MINCLSIZE. 853 */ 854 while (totlen > 0) { 855 if (top) { 856 m = sc->vx_mb[sc->vx_next_mb]; 857 sc->vx_mb[sc->vx_next_mb] = NULL; 858 if (m == NULL) { 859 MGET(m, M_NOWAIT, MT_DATA); 860 if (m == NULL) { 861 m_freem(top); 862 return NULL; 863 } 864 } else { 865 sc->vx_next_mb = (sc->vx_next_mb + 1) % MAX_MBS; 866 } 867 len = MLEN; 868 } 869 if (totlen >= MINCLSIZE) { 870 if (MCLGET(m, M_NOWAIT)) 871 len = MCLBYTES; 872 } 873 len = min(totlen, len); 874 if (len > 3) 875 bus_space_read_multi_4(sc->vx_bst, sc->vx_bsh, 876 VX_W1_RX_PIO_RD_1, mtod(m, u_int32_t *), len / 4); 877 if (len & 3) { 878 bus_space_read_multi_1(sc->vx_bst, sc->vx_bsh, 879 VX_W1_RX_PIO_RD_1, mtod(m, u_int8_t *) + (len & ~3), 880 len & 3); 881 } 882 m->m_len = len; 883 totlen -= len; 884 *mp = m; 885 mp = &m->m_next; 886 } 887 888 CSR_WRITE_2(sc, VX_COMMAND, RX_DISCARD_TOP_PACK); 889 890 return top; 891 } 892 893 894 static int 895 vx_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 896 { 897 struct vx_softc *sc = ifp->if_softc; 898 struct ifreq *ifr = (struct ifreq *) data; 899 int error = 0; 900 901 switch (cmd) { 902 case SIOCSIFFLAGS: 903 VX_LOCK(sc); 904 if ((ifp->if_flags & IFF_UP) == 0 && 905 (ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) { 906 /* 907 * If interface is marked up and it is stopped, then 908 * start it. 909 */ 910 vx_stop(sc); 911 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 912 } else if ((ifp->if_flags & IFF_UP) != 0 && 913 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 914 /* 915 * If interface is marked up and it is stopped, then 916 * start it. 917 */ 918 vx_init_locked(sc); 919 } else { 920 /* 921 * deal with flags changes: 922 * IFF_MULTICAST, IFF_PROMISC, 923 * IFF_LINK0, IFF_LINK1, 924 */ 925 vx_setfilter(sc); 926 vx_setlink(sc); 927 } 928 VX_UNLOCK(sc); 929 break; 930 931 case SIOCSIFMTU: 932 /* 933 * Set the interface MTU. 934 */ 935 VX_LOCK(sc); 936 if (ifr->ifr_mtu > ETHERMTU) { 937 error = EINVAL; 938 } else { 939 ifp->if_mtu = ifr->ifr_mtu; 940 } 941 VX_UNLOCK(sc); 942 break; 943 944 case SIOCADDMULTI: 945 case SIOCDELMULTI: 946 /* 947 * Multicast list has changed; set the hardware filter 948 * accordingly. 949 */ 950 VX_LOCK(sc); 951 vx_reset(sc); 952 VX_UNLOCK(sc); 953 error = 0; 954 break; 955 956 957 default: 958 error = ether_ioctl(ifp, cmd, data); 959 break; 960 } 961 962 return (error); 963 } 964 965 static void 966 vx_reset(struct vx_softc *sc) 967 { 968 969 VX_LOCK_ASSERT(sc); 970 vx_stop(sc); 971 vx_init_locked(sc); 972 } 973 974 static void 975 vx_watchdog(void *arg) 976 { 977 struct vx_softc *sc; 978 struct ifnet *ifp; 979 980 sc = arg; 981 VX_LOCK_ASSERT(sc); 982 callout_reset(&sc->vx_watchdog, hz, vx_watchdog, sc); 983 if (sc->vx_timer == 0 || --sc->vx_timer > 0) 984 return; 985 986 ifp = sc->vx_ifp; 987 if (ifp->if_flags & IFF_DEBUG) 988 if_printf(ifp, "device timeout\n"); 989 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 990 vx_start_locked(ifp); 991 vx_intr(sc); 992 } 993 994 void 995 vx_stop(struct vx_softc *sc) 996 { 997 998 VX_LOCK_ASSERT(sc); 999 sc->vx_timer = 0; 1000 callout_stop(&sc->vx_watchdog); 1001 1002 CSR_WRITE_2(sc, VX_COMMAND, RX_DISABLE); 1003 CSR_WRITE_2(sc, VX_COMMAND, RX_DISCARD_TOP_PACK); 1004 VX_BUSY_WAIT; 1005 CSR_WRITE_2(sc, VX_COMMAND, TX_DISABLE); 1006 CSR_WRITE_2(sc, VX_COMMAND, STOP_TRANSCEIVER); 1007 DELAY(800); 1008 CSR_WRITE_2(sc, VX_COMMAND, RX_RESET); 1009 VX_BUSY_WAIT; 1010 CSR_WRITE_2(sc, VX_COMMAND, TX_RESET); 1011 VX_BUSY_WAIT; 1012 CSR_WRITE_2(sc, VX_COMMAND, C_INTR_LATCH); 1013 CSR_WRITE_2(sc, VX_COMMAND, SET_RD_0_MASK); 1014 CSR_WRITE_2(sc, VX_COMMAND, SET_INTR_MASK); 1015 CSR_WRITE_2(sc, VX_COMMAND, SET_RX_FILTER); 1016 1017 vx_mbuf_empty(sc); 1018 } 1019 1020 int 1021 vx_busy_eeprom(struct vx_softc *sc) 1022 { 1023 int j, i = 100; 1024 1025 while (i--) { 1026 j = CSR_READ_2(sc, VX_W0_EEPROM_COMMAND); 1027 if (j & EEPROM_BUSY) 1028 DELAY(100); 1029 else 1030 break; 1031 } 1032 if (!i) { 1033 if_printf(sc->vx_ifp, "eeprom failed to come ready\n"); 1034 return (1); 1035 } 1036 return (0); 1037 } 1038 1039 static void 1040 vx_mbuf_fill(void *sp) 1041 { 1042 struct vx_softc *sc = (struct vx_softc *)sp; 1043 int i; 1044 1045 VX_LOCK_ASSERT(sc); 1046 i = sc->vx_last_mb; 1047 do { 1048 if (sc->vx_mb[i] == NULL) 1049 MGET(sc->vx_mb[i], M_NOWAIT, MT_DATA); 1050 if (sc->vx_mb[i] == NULL) 1051 break; 1052 i = (i + 1) % MAX_MBS; 1053 } while (i != sc->vx_next_mb); 1054 sc->vx_last_mb = i; 1055 /* If the queue was not filled, try again. */ 1056 if (sc->vx_last_mb != sc->vx_next_mb) { 1057 callout_reset(&sc->vx_callout, hz / 100, vx_mbuf_fill, sc); 1058 sc->vx_buffill_pending = 1; 1059 } else { 1060 sc->vx_buffill_pending = 0; 1061 } 1062 } 1063 1064 static void 1065 vx_mbuf_empty(struct vx_softc *sc) 1066 { 1067 int i; 1068 1069 VX_LOCK_ASSERT(sc); 1070 for (i = 0; i < MAX_MBS; i++) { 1071 if (sc->vx_mb[i]) { 1072 m_freem(sc->vx_mb[i]); 1073 sc->vx_mb[i] = NULL; 1074 } 1075 } 1076 sc->vx_last_mb = sc->vx_next_mb = 0; 1077 if (sc->vx_buffill_pending != 0) 1078 callout_stop(&sc->vx_callout); 1079 }
Cache object: 1f7d2441c961f9b3d590e585f4a43605
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