mb86960.c revision 1.35.2.4
1 /* $NetBSD: mb86960.c,v 1.35.2.4 2001/02/11 19:15:33 bouyer Exp $ */ 2 3 /* 4 * All Rights Reserved, Copyright (C) Fujitsu Limited 1995 5 * 6 * This software may be used, modified, copied, distributed, and sold, in 7 * both source and binary form provided that the above copyright, these 8 * terms and the following disclaimer are retained. The name of the author 9 * and/or the contributor may not be used to endorse or promote products 10 * derived from this software without specific prior written permission. 11 * 12 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND THE CONTRIBUTOR ``AS IS'' AND 13 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 14 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 15 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR THE CONTRIBUTOR BE LIABLE 16 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 17 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 18 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION. 19 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 20 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 21 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 22 * SUCH DAMAGE. 23 */ 24 25 /* 26 * Portions copyright (C) 1993, David Greenman. This software may be used, 27 * modified, copied, distributed, and sold, in both source and binary form 28 * provided that the above copyright and these terms are retained. Under no 29 * circumstances is the author responsible for the proper functioning of this 30 * software, nor does the author assume any responsibility for damages 31 * incurred with its use. 32 */ 33 34 #define FE_VERSION "if_fe.c ver. 0.8" 35 36 /* 37 * Device driver for Fujitsu MB86960A/MB86965A based Ethernet cards. 38 * Contributed by M.S. <seki (at) sysrap.cs.fujitsu.co.jp> 39 * 40 * This version is intended to be a generic template for various 41 * MB86960A/MB86965A based Ethernet cards. It currently supports 42 * Fujitsu FMV-180 series (i.e., FMV-181 and FMV-182) and Allied- 43 * Telesis AT1700 series and RE2000 series. There are some 44 * unnecessary hooks embedded, which are primarily intended to support 45 * other types of Ethernet cards, but the author is not sure whether 46 * they are useful. 47 */ 48 49 #include "opt_inet.h" 50 #include "opt_ns.h" 51 #include "bpfilter.h" 52 #include "rnd.h" 53 54 #include <sys/param.h> 55 #include <sys/systm.h> 56 #include <sys/errno.h> 57 #include <sys/ioctl.h> 58 #include <sys/mbuf.h> 59 #include <sys/socket.h> 60 #include <sys/syslog.h> 61 #include <sys/device.h> 62 #if NRND > 0 63 #include <sys/rnd.h> 64 #endif 65 66 #include <net/if.h> 67 #include <net/if_dl.h> 68 #include <net/if_types.h> 69 #include <net/if_media.h> 70 #include <net/if_ether.h> 71 72 #ifdef INET 73 #include <netinet/in.h> 74 #include <netinet/in_systm.h> 75 #include <netinet/in_var.h> 76 #include <netinet/ip.h> 77 #include <netinet/if_inarp.h> 78 #endif 79 80 #ifdef NS 81 #include <netns/ns.h> 82 #include <netns/ns_if.h> 83 #endif 84 85 #if NBPFILTER > 0 86 #include <net/bpf.h> 87 #include <net/bpfdesc.h> 88 #endif 89 90 #include <machine/bus.h> 91 92 #include <dev/ic/mb86960reg.h> 93 #include <dev/ic/mb86960var.h> 94 95 #ifndef __BUS_SPACE_HAS_STREAM_METHODS 96 #define bus_space_write_multi_stream_2 bus_space_write_multi_2 97 #define bus_space_read_multi_stream_2 bus_space_read_multi_2 98 #endif /* __BUS_SPACE_HAS_STREAM_METHODS */ 99 100 /* Standard driver entry points. These can be static. */ 101 void mb86960_init __P((struct mb86960_softc *)); 102 int mb86960_ioctl __P((struct ifnet *, u_long, caddr_t)); 103 void mb86960_start __P((struct ifnet *)); 104 void mb86960_reset __P((struct mb86960_softc *)); 105 void mb86960_watchdog __P((struct ifnet *)); 106 107 /* Local functions. Order of declaration is confused. FIXME. */ 108 int mb86960_get_packet __P((struct mb86960_softc *, int)); 109 void mb86960_stop __P((struct mb86960_softc *)); 110 void mb86960_tint __P((struct mb86960_softc *, u_char)); 111 void mb86960_rint __P((struct mb86960_softc *, u_char)); 112 static __inline__ 113 void mb86960_xmit __P((struct mb86960_softc *)); 114 void mb86960_write_mbufs __P((struct mb86960_softc *, struct mbuf *)); 115 static __inline__ 116 void mb86960_droppacket __P((struct mb86960_softc *)); 117 void mb86960_getmcaf __P((struct ethercom *, u_char *)); 118 void mb86960_setmode __P((struct mb86960_softc *)); 119 void mb86960_loadmar __P((struct mb86960_softc *)); 120 121 int mb86960_mediachange __P((struct ifnet *)); 122 void mb86960_mediastatus __P((struct ifnet *, struct ifmediareq *)); 123 124 #if FE_DEBUG >= 1 125 void mb86960_dump __P((int, struct mb86960_softc *)); 126 #endif 127 128 void 129 mb86960_attach(sc, type, myea) 130 struct mb86960_softc *sc; 131 enum mb86960_type type; 132 u_int8_t *myea; 133 { 134 bus_space_tag_t bst = sc->sc_bst; 135 bus_space_handle_t bsh = sc->sc_bsh; 136 137 sc->type = type; 138 139 /* Register values which depend on board design. */ 140 sc->proto_dlcr4 = FE_D4_LBC_DISABLE | FE_D4_CNTRL; 141 sc->proto_dlcr5 = 0; 142 sc->proto_bmpr13 = FE_B13_TPTYPE_UTP | FE_B13_PORT_AUTO; 143 144 switch (sc->type) { 145 case MB86960_TYPE_86960: 146 sc->proto_dlcr7 = FE_D7_BYTSWP_LH | FE_D7_IDENT_EC; 147 break; 148 case MB86960_TYPE_86965: 149 sc->proto_dlcr7 = FE_D7_BYTSWP_LH; 150 break; 151 } 152 153 /* 154 * Program the 86960 as follows: 155 * SRAM: 32KB, 100ns, byte-wide access. 156 * Transmission buffer: 4KB x 2. 157 * System bus interface: 16 bits. 158 * We cannot change these values but TXBSIZE, because they 159 * are hard-wired on the board. Modifying TXBSIZE will affect 160 * the driver performance. 161 */ 162 sc->proto_dlcr6 = FE_D6_BUFSIZ_32KB | FE_D6_TXBSIZ_2x4KB | 163 FE_D6_BBW_BYTE | FE_D6_SBW_WORD | FE_D6_SRAM_100ns; 164 165 /* 166 * Minimum initialization of the hardware. 167 * We write into registers; hope I/O ports have no 168 * overlap with other boards. 169 */ 170 171 /* Initialize 86960. */ 172 bus_space_write_1(bst, bsh, FE_DLCR6, 173 sc->proto_dlcr6 | FE_D6_DLC_DISABLE); 174 delay(200); 175 176 #ifdef DIAGNOSTIC 177 if (myea == NULL) { 178 printf("%s: ethernet address shouldn't be NULL\n", 179 sc->sc_dev.dv_xname); 180 panic("NULL ethernet address"); 181 } 182 #endif 183 bcopy(myea, sc->sc_enaddr, sizeof(sc->sc_enaddr)); 184 185 /* Disable all interrupts. */ 186 bus_space_write_1(bst, bsh, FE_DLCR2, 0); 187 bus_space_write_1(bst, bsh, FE_DLCR3, 0); 188 } 189 190 /* 191 * Install interface into kernel networking data structures 192 */ 193 void 194 mb86960_config(sc, media, nmedia, defmedia) 195 struct mb86960_softc *sc; 196 int *media, nmedia, defmedia; 197 { 198 struct cfdata *cf = sc->sc_dev.dv_cfdata; 199 struct ifnet *ifp = &sc->sc_ec.ec_if; 200 int i; 201 202 /* Stop the 86960. */ 203 mb86960_stop(sc); 204 205 /* Initialize ifnet structure. */ 206 bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ); 207 ifp->if_softc = sc; 208 ifp->if_start = mb86960_start; 209 ifp->if_ioctl = mb86960_ioctl; 210 ifp->if_watchdog = mb86960_watchdog; 211 ifp->if_flags = 212 IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; 213 IFQ_SET_READY(&ifp->if_snd); 214 215 #if FE_DEBUG >= 3 216 log(LOG_INFO, "%s: mb86960_config()\n", sc->sc_dev.dv_xname); 217 mb86960_dump(LOG_INFO, sc); 218 #endif 219 220 #if FE_SINGLE_TRANSMISSION 221 /* Override txb config to allocate minimum. */ 222 sc->proto_dlcr6 &= ~FE_D6_TXBSIZ 223 sc->proto_dlcr6 |= FE_D6_TXBSIZ_2x2KB; 224 #endif 225 226 /* Modify hardware config if it is requested. */ 227 if ((cf->cf_flags & FE_FLAGS_OVERRIDE_DLCR6) != 0) 228 sc->proto_dlcr6 = cf->cf_flags & FE_FLAGS_DLCR6_VALUE; 229 230 /* Find TX buffer size, based on the hardware dependent proto. */ 231 switch (sc->proto_dlcr6 & FE_D6_TXBSIZ) { 232 case FE_D6_TXBSIZ_2x2KB: 233 sc->txb_size = 2048; 234 break; 235 case FE_D6_TXBSIZ_2x4KB: 236 sc->txb_size = 4096; 237 break; 238 case FE_D6_TXBSIZ_2x8KB: 239 sc->txb_size = 8192; 240 break; 241 default: 242 /* Oops, we can't work with single buffer configuration. */ 243 #if FE_DEBUG >= 2 244 log(LOG_WARNING, "%s: strange TXBSIZ config; fixing\n", 245 sc->sc_dev.dv_xname); 246 #endif 247 sc->proto_dlcr6 &= ~FE_D6_TXBSIZ; 248 sc->proto_dlcr6 |= FE_D6_TXBSIZ_2x2KB; 249 sc->txb_size = 2048; 250 break; 251 } 252 253 /* Initialize media goo. */ 254 ifmedia_init(&sc->sc_media, 0, mb86960_mediachange, 255 mb86960_mediastatus); 256 if (media != NULL) { 257 for (i = 0; i < nmedia; i++) 258 ifmedia_add(&sc->sc_media, media[i], 0, NULL); 259 ifmedia_set(&sc->sc_media, defmedia); 260 } else { 261 ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); 262 ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); 263 } 264 265 /* Attach the interface. */ 266 if_attach(ifp); 267 ether_ifattach(ifp, sc->sc_enaddr); 268 269 #if NRND > 0 270 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 271 RND_TYPE_NET, 0); 272 #endif 273 /* Print additional info when attached. */ 274 printf("%s: Ethernet address %s\n", sc->sc_dev.dv_xname, 275 ether_sprintf(sc->sc_enaddr)); 276 277 #if FE_DEBUG >= 3 278 { 279 int buf, txb, bbw, sbw, ram; 280 281 buf = txb = bbw = sbw = ram = -1; 282 switch (sc->proto_dlcr6 & FE_D6_BUFSIZ) { 283 case FE_D6_BUFSIZ_8KB: 284 buf = 8; 285 break; 286 case FE_D6_BUFSIZ_16KB: 287 buf = 16; 288 break; 289 case FE_D6_BUFSIZ_32KB: 290 buf = 32; 291 break; 292 case FE_D6_BUFSIZ_64KB: 293 buf = 64; 294 break; 295 } 296 switch (sc->proto_dlcr6 & FE_D6_TXBSIZ) { 297 case FE_D6_TXBSIZ_2x2KB: 298 txb = 2; 299 break; 300 case FE_D6_TXBSIZ_2x4KB: 301 txb = 4; 302 break; 303 case FE_D6_TXBSIZ_2x8KB: 304 txb = 8; 305 break; 306 } 307 switch (sc->proto_dlcr6 & FE_D6_BBW) { 308 case FE_D6_BBW_BYTE: 309 bbw = 8; 310 break; 311 case FE_D6_BBW_WORD: 312 bbw = 16; 313 break; 314 } 315 switch (sc->proto_dlcr6 & FE_D6_SBW) { 316 case FE_D6_SBW_BYTE: 317 sbw = 8; 318 break; 319 case FE_D6_SBW_WORD: 320 sbw = 16; 321 break; 322 } 323 switch (sc->proto_dlcr6 & FE_D6_SRAM) { 324 case FE_D6_SRAM_100ns: 325 ram = 100; 326 break; 327 case FE_D6_SRAM_150ns: 328 ram = 150; 329 break; 330 } 331 printf("%s: SRAM %dKB %dbit %dns, TXB %dKBx2, %dbit I/O\n", 332 sc->sc_dev.dv_xname, buf, bbw, ram, txb, sbw); 333 } 334 #endif 335 336 /* The attach is successful. */ 337 sc->sc_flags |= FE_FLAGS_ATTACHED; 338 } 339 340 /* 341 * Media change callback. 342 */ 343 int 344 mb86960_mediachange(ifp) 345 struct ifnet *ifp; 346 { 347 struct mb86960_softc *sc = ifp->if_softc; 348 349 if (sc->sc_mediachange) 350 return ((*sc->sc_mediachange)(sc)); 351 return (0); 352 } 353 354 /* 355 * Media status callback. 356 */ 357 void 358 mb86960_mediastatus(ifp, ifmr) 359 struct ifnet *ifp; 360 struct ifmediareq *ifmr; 361 { 362 struct mb86960_softc *sc = ifp->if_softc; 363 364 if ((sc->sc_flags & FE_FLAGS_ENABLED) == 0) { 365 ifmr->ifm_active = IFM_ETHER | IFM_NONE; 366 ifmr->ifm_status = 0; 367 return; 368 } 369 370 if (sc->sc_mediastatus) 371 (*sc->sc_mediastatus)(sc, ifmr); 372 } 373 374 /* 375 * Reset interface. 376 */ 377 void 378 mb86960_reset(sc) 379 struct mb86960_softc *sc; 380 { 381 int s; 382 383 s = splnet(); 384 mb86960_stop(sc); 385 mb86960_init(sc); 386 splx(s); 387 } 388 389 /* 390 * Stop everything on the interface. 391 * 392 * All buffered packets, both transmitting and receiving, 393 * if any, will be lost by stopping the interface. 394 */ 395 void 396 mb86960_stop(sc) 397 struct mb86960_softc *sc; 398 { 399 bus_space_tag_t bst = sc->sc_bst; 400 bus_space_handle_t bsh = sc->sc_bsh; 401 402 #if FE_DEBUG >= 3 403 log(LOG_INFO, "%s: top of mb86960_stop()\n", sc->sc_dev.dv_xname); 404 mb86960_dump(LOG_INFO, sc); 405 #endif 406 407 /* Disable interrupts. */ 408 bus_space_write_1(bst, bsh, FE_DLCR2, 0x00); 409 bus_space_write_1(bst, bsh, FE_DLCR3, 0x00); 410 411 /* Stop interface hardware. */ 412 delay(200); 413 bus_space_write_1(bst, bsh, FE_DLCR6, 414 sc->proto_dlcr6 | FE_D6_DLC_DISABLE); 415 delay(200); 416 417 /* Clear all interrupt status. */ 418 bus_space_write_1(bst, bsh, FE_DLCR0, 0xFF); 419 bus_space_write_1(bst, bsh, FE_DLCR1, 0xFF); 420 421 /* Put the chip in stand-by mode. */ 422 delay(200); 423 bus_space_write_1(bst, bsh, FE_DLCR7, 424 sc->proto_dlcr7 | FE_D7_POWER_DOWN); 425 delay(200); 426 427 /* MAR loading can be delayed. */ 428 sc->filter_change = 0; 429 430 /* Call a hook. */ 431 if (sc->stop_card) 432 (*sc->stop_card)(sc); 433 434 #if FE_DEBUG >= 3 435 log(LOG_INFO, "%s: end of mb86960_stop()\n", sc->sc_dev.dv_xname); 436 mb86960_dump(LOG_INFO, sc); 437 #endif 438 } 439 440 /* 441 * Device timeout/watchdog routine. Entered if the device neglects to 442 * generate an interrupt after a transmit has been started on it. 443 */ 444 void 445 mb86960_watchdog(ifp) 446 struct ifnet *ifp; 447 { 448 struct mb86960_softc *sc = ifp->if_softc; 449 450 log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname); 451 #if FE_DEBUG >= 3 452 mb86960_dump(LOG_INFO, sc); 453 #endif 454 455 /* Record how many packets are lost by this accident. */ 456 sc->sc_ec.ec_if.if_oerrors += sc->txb_sched + sc->txb_count; 457 458 mb86960_reset(sc); 459 } 460 461 /* 462 * Drop (skip) a packet from receive buffer in 86960 memory. 463 */ 464 static __inline__ void 465 mb86960_droppacket(sc) 466 struct mb86960_softc *sc; 467 { 468 bus_space_tag_t bst = sc->sc_bst; 469 bus_space_handle_t bsh = sc->sc_bsh; 470 471 bus_space_write_1(bst, bsh, FE_BMPR14, FE_B14_FILTER | FE_B14_SKIP); 472 } 473 474 /* 475 * Initialize device. 476 */ 477 void 478 mb86960_init(sc) 479 struct mb86960_softc *sc; 480 { 481 bus_space_tag_t bst = sc->sc_bst; 482 bus_space_handle_t bsh = sc->sc_bsh; 483 struct ifnet *ifp = &sc->sc_ec.ec_if; 484 int i; 485 486 #if FE_DEBUG >= 3 487 log(LOG_INFO, "%s: top of mb86960_init()\n", sc->sc_dev.dv_xname); 488 mb86960_dump(LOG_INFO, sc); 489 #endif 490 491 /* Reset transmitter flags. */ 492 ifp->if_flags &= ~IFF_OACTIVE; 493 ifp->if_timer = 0; 494 495 sc->txb_free = sc->txb_size; 496 sc->txb_count = 0; 497 sc->txb_sched = 0; 498 499 /* Do any card-specific initialization, if applicable. */ 500 if (sc->init_card) 501 (*sc->init_card)(sc); 502 503 #if FE_DEBUG >= 3 504 log(LOG_INFO, "%s: after init hook\n", sc->sc_dev.dv_xname); 505 mb86960_dump(LOG_INFO, sc); 506 #endif 507 508 /* 509 * Make sure to disable the chip, also. 510 * This may also help re-programming the chip after 511 * hot insertion of PCMCIAs. 512 */ 513 bus_space_write_1(bst, bsh, FE_DLCR6, 514 sc->proto_dlcr6 | FE_D6_DLC_DISABLE); 515 delay(200); 516 517 /* Power up the chip and select register bank for DLCRs. */ 518 bus_space_write_1(bst, bsh, FE_DLCR7, 519 sc->proto_dlcr7 | FE_D7_RBS_DLCR | FE_D7_POWER_UP); 520 delay(200); 521 522 /* Feed the station address. */ 523 bus_space_write_region_1(bst, bsh, FE_DLCR8, 524 sc->sc_enaddr, ETHER_ADDR_LEN); 525 526 /* Select the BMPR bank for runtime register access. */ 527 bus_space_write_1(bst, bsh, FE_DLCR7, 528 sc->proto_dlcr7 | FE_D7_RBS_BMPR | FE_D7_POWER_UP); 529 530 /* Initialize registers. */ 531 bus_space_write_1(bst, bsh, FE_DLCR0, 0xFF); /* Clear all bits. */ 532 bus_space_write_1(bst, bsh, FE_DLCR1, 0xFF); /* ditto. */ 533 bus_space_write_1(bst, bsh, FE_DLCR2, 0x00); 534 bus_space_write_1(bst, bsh, FE_DLCR3, 0x00); 535 bus_space_write_1(bst, bsh, FE_DLCR4, sc->proto_dlcr4); 536 bus_space_write_1(bst, bsh, FE_DLCR5, sc->proto_dlcr5); 537 bus_space_write_1(bst, bsh, FE_BMPR10, 0x00); 538 bus_space_write_1(bst, bsh, FE_BMPR11, FE_B11_CTRL_SKIP); 539 bus_space_write_1(bst, bsh, FE_BMPR12, 0x00); 540 bus_space_write_1(bst, bsh, FE_BMPR13, sc->proto_bmpr13); 541 bus_space_write_1(bst, bsh, FE_BMPR14, FE_B14_FILTER); 542 bus_space_write_1(bst, bsh, FE_BMPR15, 0x00); 543 544 #if FE_DEBUG >= 3 545 log(LOG_INFO, "%s: just before enabling DLC\n", sc->sc_dev.dv_xname); 546 mb86960_dump(LOG_INFO, sc); 547 #endif 548 549 /* Enable interrupts. */ 550 bus_space_write_1(bst, bsh, FE_DLCR2, FE_TMASK); 551 bus_space_write_1(bst, bsh, FE_DLCR3, FE_RMASK); 552 553 /* Enable transmitter and receiver. */ 554 delay(200); 555 bus_space_write_1(bst, bsh, FE_DLCR6, 556 sc->proto_dlcr6 | FE_D6_DLC_ENABLE); 557 delay(200); 558 559 #if FE_DEBUG >= 3 560 log(LOG_INFO, "%s: just after enabling DLC\n", sc->sc_dev.dv_xname); 561 mb86960_dump(LOG_INFO, sc); 562 #endif 563 564 /* 565 * Make sure to empty the receive buffer. 566 * 567 * This may be redundant, but *if* the receive buffer were full 568 * at this point, the driver would hang. I have experienced 569 * some strange hangups just after UP. I hope the following 570 * code solve the problem. 571 * 572 * I have changed the order of hardware initialization. 573 * I think the receive buffer cannot have any packets at this 574 * point in this version. The following code *must* be 575 * redundant now. FIXME. 576 */ 577 for (i = 0; i < FE_MAX_RECV_COUNT; i++) { 578 if (bus_space_read_1(bst, bsh, FE_DLCR5) & FE_D5_BUFEMP) 579 break; 580 mb86960_droppacket(sc); 581 } 582 #if FE_DEBUG >= 1 583 if (i >= FE_MAX_RECV_COUNT) 584 log(LOG_ERR, "%s: cannot empty receive buffer\n", 585 sc->sc_dev.dv_xname); 586 #endif 587 #if FE_DEBUG >= 3 588 if (i < FE_MAX_RECV_COUNT) 589 log(LOG_INFO, "%s: receive buffer emptied (%d)\n", 590 sc->sc_dev.dv_xname, i); 591 #endif 592 593 #if FE_DEBUG >= 3 594 log(LOG_INFO, "%s: after ERB loop\n", sc->sc_dev.dv_xname); 595 mb86960_dump(LOG_INFO, sc); 596 #endif 597 598 /* Do we need this here? */ 599 bus_space_write_1(bst, bsh, FE_DLCR0, 0xFF); /* Clear all bits. */ 600 bus_space_write_1(bst, bsh, FE_DLCR1, 0xFF); /* ditto. */ 601 602 #if FE_DEBUG >= 3 603 log(LOG_INFO, "%s: after FIXME\n", sc->sc_dev.dv_xname); 604 mb86960_dump(LOG_INFO, sc); 605 #endif 606 607 /* Set 'running' flag. */ 608 ifp->if_flags |= IFF_RUNNING; 609 610 /* 611 * At this point, the interface is runnung properly, 612 * except that it receives *no* packets. we then call 613 * mb86960_setmode() to tell the chip what packets to be 614 * received, based on the if_flags and multicast group 615 * list. It completes the initialization process. 616 */ 617 mb86960_setmode(sc); 618 619 #if FE_DEBUG >= 3 620 log(LOG_INFO, "%s: after setmode\n", sc->sc_dev.dv_xname); 621 mb86960_dump(LOG_INFO, sc); 622 #endif 623 624 /* ...and attempt to start output. */ 625 mb86960_start(ifp); 626 627 #if FE_DEBUG >= 3 628 log(LOG_INFO, "%s: end of mb86960_init()\n", sc->sc_dev.dv_xname); 629 mb86960_dump(LOG_INFO, sc); 630 #endif 631 } 632 633 /* 634 * This routine actually starts the transmission on the interface 635 */ 636 static __inline__ void 637 mb86960_xmit(sc) 638 struct mb86960_softc *sc; 639 { 640 bus_space_tag_t bst = sc->sc_bst; 641 bus_space_handle_t bsh = sc->sc_bsh; 642 643 /* 644 * Set a timer just in case we never hear from the board again. 645 * We use longer timeout for multiple packet transmission. 646 * I'm not sure this timer value is appropriate. FIXME. 647 */ 648 sc->sc_ec.ec_if.if_timer = 1 + sc->txb_count; 649 650 /* Update txb variables. */ 651 sc->txb_sched = sc->txb_count; 652 sc->txb_count = 0; 653 sc->txb_free = sc->txb_size; 654 655 #if FE_DELAYED_PADDING 656 /* Omit the postponed padding process. */ 657 sc->txb_padding = 0; 658 #endif 659 660 /* Start transmitter, passing packets in TX buffer. */ 661 bus_space_write_1(bst, bsh, FE_BMPR10, sc->txb_sched | FE_B10_START); 662 } 663 664 /* 665 * Start output on interface. 666 * We make two assumptions here: 667 * 1) that the current priority is set to splnet _before_ this code 668 * is called *and* is returned to the appropriate priority after 669 * return 670 * 2) that the IFF_OACTIVE flag is checked before this code is called 671 * (i.e. that the output part of the interface is idle) 672 */ 673 void 674 mb86960_start(ifp) 675 struct ifnet *ifp; 676 { 677 struct mb86960_softc *sc = ifp->if_softc; 678 struct mbuf *m; 679 680 #if FE_DEBUG >= 1 681 /* Just a sanity check. */ 682 if ((sc->txb_count == 0) != (sc->txb_free == sc->txb_size)) { 683 /* 684 * Txb_count and txb_free co-works to manage the 685 * transmission buffer. Txb_count keeps track of the 686 * used potion of the buffer, while txb_free does unused 687 * potion. So, as long as the driver runs properly, 688 * txb_count is zero if and only if txb_free is same 689 * as txb_size (which represents whole buffer.) 690 */ 691 log(LOG_ERR, "%s: inconsistent txb variables (%d, %d)\n", 692 sc->sc_dev.dv_xname, sc->txb_count, sc->txb_free); 693 /* 694 * So, what should I do, then? 695 * 696 * We now know txb_count and txb_free contradicts. We 697 * cannot, however, tell which is wrong. More 698 * over, we cannot peek 86960 transmission buffer or 699 * reset the transmission buffer. (In fact, we can 700 * reset the entire interface. I don't want to do it.) 701 * 702 * If txb_count is incorrect, leaving it as is will cause 703 * sending of gabages after next interrupt. We have to 704 * avoid it. Hence, we reset the txb_count here. If 705 * txb_free was incorrect, resetting txb_count just loose 706 * some packets. We can live with it. 707 */ 708 sc->txb_count = 0; 709 } 710 #endif 711 712 #if FE_DEBUG >= 1 713 /* 714 * First, see if there are buffered packets and an idle 715 * transmitter - should never happen at this point. 716 */ 717 if ((sc->txb_count > 0) && (sc->txb_sched == 0)) { 718 log(LOG_ERR, "%s: transmitter idle with %d buffered packets\n", 719 sc->sc_dev.dv_xname, sc->txb_count); 720 mb86960_xmit(sc); 721 } 722 #endif 723 724 /* 725 * Stop accepting more transmission packets temporarily, when 726 * a filter change request is delayed. Updating the MARs on 727 * 86960 flushes the transmisstion buffer, so it is delayed 728 * until all buffered transmission packets have been sent 729 * out. 730 */ 731 if (sc->filter_change) { 732 /* 733 * Filter change requst is delayed only when the DLC is 734 * working. DLC soon raise an interrupt after finishing 735 * the work. 736 */ 737 goto indicate_active; 738 } 739 740 for (;;) { 741 /* 742 * See if there is room to put another packet in the buffer. 743 * We *could* do better job by peeking the send queue to 744 * know the length of the next packet. Current version just 745 * tests against the worst case (i.e., longest packet). FIXME. 746 * 747 * When adding the packet-peek feature, don't forget adding a 748 * test on txb_count against QUEUEING_MAX. 749 * There is a little chance the packet count exceeds 750 * the limit. Assume transmission buffer is 8KB (2x8KB 751 * configuration) and an application sends a bunch of small 752 * (i.e., minimum packet sized) packets rapidly. An 8KB 753 * buffer can hold 130 blocks of 62 bytes long... 754 */ 755 if (sc->txb_free < 756 (ETHER_MAX_LEN - ETHER_CRC_LEN) + FE_DATA_LEN_LEN) { 757 /* No room. */ 758 goto indicate_active; 759 } 760 761 #if FE_SINGLE_TRANSMISSION 762 if (sc->txb_count > 0) { 763 /* Just one packet per a transmission buffer. */ 764 goto indicate_active; 765 } 766 #endif 767 768 /* 769 * Get the next mbuf chain for a packet to send. 770 */ 771 IFQ_DEQUEUE(&ifp->if_snd, m); 772 if (m == 0) { 773 /* No more packets to send. */ 774 goto indicate_inactive; 775 } 776 777 #if NBPFILTER > 0 778 /* Tap off here if there is a BPF listener. */ 779 if (ifp->if_bpf) 780 bpf_mtap(ifp->if_bpf, m); 781 #endif 782 783 /* 784 * Copy the mbuf chain into the transmission buffer. 785 * txb_* variables are updated as necessary. 786 */ 787 mb86960_write_mbufs(sc, m); 788 789 m_freem(m); 790 791 /* Start transmitter if it's idle. */ 792 if (sc->txb_sched == 0) 793 mb86960_xmit(sc); 794 } 795 796 indicate_inactive: 797 /* 798 * We are using the !OACTIVE flag to indicate to 799 * the outside world that we can accept an 800 * additional packet rather than that the 801 * transmitter is _actually_ active. Indeed, the 802 * transmitter may be active, but if we haven't 803 * filled all the buffers with data then we still 804 * want to accept more. 805 */ 806 ifp->if_flags &= ~IFF_OACTIVE; 807 return; 808 809 indicate_active: 810 /* 811 * The transmitter is active, and there are no room for 812 * more outgoing packets in the transmission buffer. 813 */ 814 ifp->if_flags |= IFF_OACTIVE; 815 return; 816 } 817 818 /* 819 * Transmission interrupt handler 820 * The control flow of this function looks silly. FIXME. 821 */ 822 void 823 mb86960_tint(sc, tstat) 824 struct mb86960_softc *sc; 825 u_char tstat; 826 { 827 bus_space_tag_t bst = sc->sc_bst; 828 bus_space_handle_t bsh = sc->sc_bsh; 829 struct ifnet *ifp = &sc->sc_ec.ec_if; 830 int left; 831 int col; 832 833 /* 834 * Handle "excessive collision" interrupt. 835 */ 836 if (tstat & FE_D0_COLL16) { 837 /* 838 * Find how many packets (including this collided one) 839 * are left unsent in transmission buffer. 840 */ 841 left = bus_space_read_1(bst, bsh, FE_BMPR10); 842 843 #if FE_DEBUG >= 2 844 log(LOG_WARNING, "%s: excessive collision (%d/%d)\n", 845 sc->sc_dev.dv_xname, left, sc->txb_sched); 846 #endif 847 #if FE_DEBUG >= 3 848 mb86960_dump(LOG_INFO, sc); 849 #endif 850 851 /* 852 * Update statistics. 853 */ 854 ifp->if_collisions += 16; 855 ifp->if_oerrors++; 856 ifp->if_opackets += sc->txb_sched - left; 857 858 /* 859 * Collision statistics has been updated. 860 * Clear the collision flag on 86960 now to avoid confusion. 861 */ 862 bus_space_write_1(bst, bsh, FE_DLCR0, FE_D0_COLLID); 863 864 /* 865 * Restart transmitter, skipping the 866 * collided packet. 867 * 868 * We *must* skip the packet to keep network running 869 * properly. Excessive collision error is an 870 * indication of the network overload. If we 871 * tried sending the same packet after excessive 872 * collision, the network would be filled with 873 * out-of-time packets. Packets belonging 874 * to reliable transport (such as TCP) are resent 875 * by some upper layer. 876 */ 877 bus_space_write_1(bst, bsh, FE_BMPR11, 878 FE_B11_CTRL_SKIP | FE_B11_MODE1); 879 sc->txb_sched = left - 1; 880 } 881 882 /* 883 * Handle "transmission complete" interrupt. 884 */ 885 if (tstat & FE_D0_TXDONE) { 886 /* 887 * Add in total number of collisions on last 888 * transmission. We also clear "collision occurred" flag 889 * here. 890 * 891 * 86960 has a design flow on collision count on multiple 892 * packet transmission. When we send two or more packets 893 * with one start command (that's what we do when the 894 * transmission queue is clauded), 86960 informs us number 895 * of collisions occured on the last packet on the 896 * transmission only. Number of collisions on previous 897 * packets are lost. I have told that the fact is clearly 898 * stated in the Fujitsu document. 899 * 900 * I considered not to mind it seriously. Collision 901 * count is not so important, anyway. Any comments? FIXME. 902 */ 903 904 if (bus_space_read_1(bst, bsh, FE_DLCR0) & FE_D0_COLLID) { 905 /* Clear collision flag. */ 906 bus_space_write_1(bst, bsh, FE_DLCR0, FE_D0_COLLID); 907 908 /* Extract collision count from 86960. */ 909 col = bus_space_read_1(bst, bsh, FE_DLCR4) & FE_D4_COL; 910 if (col == 0) { 911 /* 912 * Status register indicates collisions, 913 * while the collision count is zero. 914 * This can happen after multiple packet 915 * transmission, indicating that one or more 916 * previous packet(s) had been collided. 917 * 918 * Since the accurate number of collisions 919 * has been lost, we just guess it as 1; 920 * Am I too optimistic? FIXME. 921 */ 922 col = 1; 923 } else 924 col >>= FE_D4_COL_SHIFT; 925 ifp->if_collisions += col; 926 #if FE_DEBUG >= 4 927 log(LOG_WARNING, "%s: %d collision%s (%d)\n", 928 sc->sc_dev.dv_xname, col, col == 1 ? "" : "s", 929 sc->txb_sched); 930 #endif 931 } 932 933 /* 934 * Update total number of successfully 935 * transmitted packets. 936 */ 937 ifp->if_opackets += sc->txb_sched; 938 sc->txb_sched = 0; 939 } 940 941 if (sc->txb_sched == 0) { 942 /* 943 * The transmitter is no more active. 944 * Reset output active flag and watchdog timer. 945 */ 946 ifp->if_flags &= ~IFF_OACTIVE; 947 ifp->if_timer = 0; 948 949 /* 950 * If more data is ready to transmit in the buffer, start 951 * transmitting them. Otherwise keep transmitter idle, 952 * even if more data is queued. This gives receive 953 * process a slight priority. 954 */ 955 if (sc->txb_count > 0) 956 mb86960_xmit(sc); 957 } 958 } 959 960 /* 961 * Ethernet interface receiver interrupt. 962 */ 963 void 964 mb86960_rint(sc, rstat) 965 struct mb86960_softc *sc; 966 u_char rstat; 967 { 968 bus_space_tag_t bst = sc->sc_bst; 969 bus_space_handle_t bsh = sc->sc_bsh; 970 struct ifnet *ifp = &sc->sc_ec.ec_if; 971 int len; 972 u_char status; 973 int i; 974 975 /* 976 * Update statistics if this interrupt is caused by an error. 977 */ 978 if (rstat & (FE_D1_OVRFLO | FE_D1_CRCERR | FE_D1_ALGERR | 979 FE_D1_SRTPKT)) { 980 #if FE_DEBUG >= 3 981 char sbuf[sizeof(FE_D1_ERRBITS) + 64]; 982 983 bitmask_snprintf(rstat, FE_D1_ERRBITS, sbuf, sizeof(sbuf)); 984 log(LOG_WARNING, "%s: receive error: %s\n", 985 sc->sc_dev.dv_xname, sbuf); 986 #endif 987 ifp->if_ierrors++; 988 } 989 990 /* 991 * MB86960 has a flag indicating "receive queue empty." 992 * We just loop cheking the flag to pull out all received 993 * packets. 994 * 995 * We limit the number of iterrations to avoid infinite loop. 996 * It can be caused by a very slow CPU (some broken 997 * peripheral may insert incredible number of wait cycles) 998 * or, worse, by a broken MB86960 chip. 999 */ 1000 for (i = 0; i < FE_MAX_RECV_COUNT; i++) { 1001 /* Stop the iterration if 86960 indicates no packets. */ 1002 if (bus_space_read_1(bst, bsh, FE_DLCR5) & FE_D5_BUFEMP) 1003 break; 1004 1005 /* 1006 * Extract A receive status byte. 1007 * As our 86960 is in 16 bit bus access mode, we have to 1008 * use inw() to get the status byte. The significant 1009 * value is returned in lower 8 bits. 1010 */ 1011 status = (u_char)bus_space_read_2(bst, bsh, FE_BMPR8); 1012 #if FE_DEBUG >= 4 1013 log(LOG_INFO, "%s: receive status = %02x\n", 1014 sc->sc_dev.dv_xname, status); 1015 #endif 1016 1017 /* 1018 * If there was an error, update statistics and drop 1019 * the packet, unless the interface is in promiscuous 1020 * mode. 1021 */ 1022 if ((status & 0xF0) != 0x20) { /* XXXX ? */ 1023 if ((ifp->if_flags & IFF_PROMISC) == 0) { 1024 ifp->if_ierrors++; 1025 mb86960_droppacket(sc); 1026 continue; 1027 } 1028 } 1029 1030 /* 1031 * Extract the packet length. 1032 * It is a sum of a header (14 bytes) and a payload. 1033 * CRC has been stripped off by the 86960. 1034 */ 1035 len = bus_space_read_2(bst, bsh, FE_BMPR8); 1036 1037 /* 1038 * MB86965 checks the packet length and drop big packet 1039 * before passing it to us. There are no chance we can 1040 * get [crufty] packets. Hence, if the length exceeds 1041 * the specified limit, it means some serious failure, 1042 * such as out-of-sync on receive buffer management. 1043 * 1044 * Is this statement true? FIXME. 1045 */ 1046 if (len > (ETHER_MAX_LEN - ETHER_CRC_LEN) || 1047 len < ETHER_HDR_LEN) { 1048 #if FE_DEBUG >= 2 1049 log(LOG_WARNING, 1050 "%s: received a %s packet? (%u bytes)\n", 1051 sc->sc_dev.dv_xname, 1052 len < ETHER_HDR_LEN ? "partial" : "big", len); 1053 #endif 1054 ifp->if_ierrors++; 1055 mb86960_droppacket(sc); 1056 continue; 1057 } 1058 1059 /* 1060 * Check for a short (RUNT) packet. We *do* check 1061 * but do nothing other than print a message. 1062 * Short packets are illegal, but does nothing bad 1063 * if it carries data for upper layer. 1064 */ 1065 #if FE_DEBUG >= 2 1066 if (len < (ETHER_MIN_LEN - ETHER_CRC_LEN)) { 1067 log(LOG_WARNING, 1068 "%s: received a short packet? (%u bytes)\n", 1069 sc->sc_dev.dv_xname, len); 1070 } 1071 #endif 1072 1073 /* 1074 * Go get a packet. 1075 */ 1076 if (!mb86960_get_packet(sc, len)) { 1077 /* Skip a packet, updating statistics. */ 1078 #if FE_DEBUG >= 2 1079 log(LOG_WARNING, 1080 "%s: out of mbufs; dropping packet (%u bytes)\n", 1081 sc->sc_dev.dv_xname, len); 1082 #endif 1083 ifp->if_ierrors++; 1084 mb86960_droppacket(sc); 1085 1086 /* 1087 * We stop receiving packets, even if there are 1088 * more in the buffer. We hope we can get more 1089 * mbufs next time. 1090 */ 1091 return; 1092 } 1093 1094 /* Successfully received a packet. Update stat. */ 1095 ifp->if_ipackets++; 1096 } 1097 } 1098 1099 /* 1100 * Ethernet interface interrupt processor 1101 */ 1102 int 1103 mb86960_intr(arg) 1104 void *arg; 1105 { 1106 struct mb86960_softc *sc = arg; 1107 bus_space_tag_t bst = sc->sc_bst; 1108 bus_space_handle_t bsh = sc->sc_bsh; 1109 struct ifnet *ifp = &sc->sc_ec.ec_if; 1110 u_char tstat, rstat; 1111 1112 if ((sc->sc_flags & FE_FLAGS_ENABLED) == 0 || 1113 (sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 1114 return (0); 1115 1116 #if FE_DEBUG >= 4 1117 log(LOG_INFO, "%s: mb86960_intr()\n", sc->sc_dev.dv_xname); 1118 mb86960_dump(LOG_INFO, sc); 1119 #endif 1120 1121 /* 1122 * Get interrupt conditions, masking unneeded flags. 1123 */ 1124 tstat = bus_space_read_1(bst, bsh, FE_DLCR0) & FE_TMASK; 1125 rstat = bus_space_read_1(bst, bsh, FE_DLCR1) & FE_RMASK; 1126 if (tstat == 0 && rstat == 0) 1127 return (0); 1128 1129 /* 1130 * Loop until there are no more new interrupt conditions. 1131 */ 1132 for (;;) { 1133 /* 1134 * Reset the conditions we are acknowledging. 1135 */ 1136 bus_space_write_1(bst, bsh, FE_DLCR0, tstat); 1137 bus_space_write_1(bst, bsh, FE_DLCR1, rstat); 1138 1139 /* 1140 * Handle transmitter interrupts. Handle these first because 1141 * the receiver will reset the board under some conditions. 1142 */ 1143 if (tstat != 0) 1144 mb86960_tint(sc, tstat); 1145 1146 /* 1147 * Handle receiver interrupts. 1148 */ 1149 if (rstat != 0) 1150 mb86960_rint(sc, rstat); 1151 1152 /* 1153 * Update the multicast address filter if it is 1154 * needed and possible. We do it now, because 1155 * we can make sure the transmission buffer is empty, 1156 * and there is a good chance that the receive queue 1157 * is empty. It will minimize the possibility of 1158 * packet lossage. 1159 */ 1160 if (sc->filter_change && 1161 sc->txb_count == 0 && sc->txb_sched == 0) { 1162 mb86960_loadmar(sc); 1163 ifp->if_flags &= ~IFF_OACTIVE; 1164 } 1165 1166 /* 1167 * If it looks like the transmitter can take more data, 1168 * attempt to start output on the interface. This is done 1169 * after handling the receiver interrupt to give the 1170 * receive operation priority. 1171 */ 1172 if ((ifp->if_flags & IFF_OACTIVE) == 0) 1173 mb86960_start(ifp); 1174 1175 #if NRND > 0 1176 if (rstat != 0 || tstat != 0) 1177 rnd_add_uint32(&sc->rnd_source, rstat + tstat); 1178 #endif 1179 1180 /* 1181 * Get interrupt conditions, masking unneeded flags. 1182 */ 1183 tstat = bus_space_read_1(bst, bsh, FE_DLCR0) & FE_TMASK; 1184 rstat = bus_space_read_1(bst, bsh, FE_DLCR1) & FE_RMASK; 1185 if (tstat == 0 && rstat == 0) 1186 return (1); 1187 } 1188 } 1189 1190 /* 1191 * Process an ioctl request. This code needs some work - it looks pretty ugly. 1192 */ 1193 int 1194 mb86960_ioctl(ifp, cmd, data) 1195 struct ifnet *ifp; 1196 u_long cmd; 1197 caddr_t data; 1198 { 1199 struct mb86960_softc *sc = ifp->if_softc; 1200 struct ifaddr *ifa = (struct ifaddr *)data; 1201 struct ifreq *ifr = (struct ifreq *)data; 1202 int s, error = 0; 1203 1204 #if FE_DEBUG >= 3 1205 log(LOG_INFO, "%s: ioctl(%lx)\n", sc->sc_dev.dv_xname, cmd); 1206 #endif 1207 1208 s = splnet(); 1209 1210 switch (cmd) { 1211 case SIOCSIFADDR: 1212 if ((error = mb86960_enable(sc)) != 0) 1213 break; 1214 ifp->if_flags |= IFF_UP; 1215 1216 switch (ifa->ifa_addr->sa_family) { 1217 #ifdef INET 1218 case AF_INET: 1219 mb86960_init(sc); 1220 arp_ifinit(ifp, ifa); 1221 break; 1222 #endif 1223 #ifdef NS 1224 case AF_NS: 1225 { 1226 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 1227 1228 if (ns_nullhost(*ina)) 1229 ina->x_host = 1230 *(union ns_host *)LLADDR(ifp->if_sadl); 1231 else { 1232 bcopy(ina->x_host.c_host, LLADDR(ifp->if_sadl), 1233 ETHER_ADDR_LEN); 1234 } 1235 /* Set new address. */ 1236 mb86960_init(sc); 1237 break; 1238 } 1239 #endif 1240 default: 1241 mb86960_init(sc); 1242 break; 1243 } 1244 break; 1245 1246 case SIOCSIFFLAGS: 1247 if ((ifp->if_flags & IFF_UP) == 0 && 1248 (ifp->if_flags & IFF_RUNNING) != 0) { 1249 /* 1250 * If interface is marked down and it is running, then 1251 * stop it. 1252 */ 1253 mb86960_stop(sc); 1254 ifp->if_flags &= ~IFF_RUNNING; 1255 mb86960_disable(sc); 1256 } else if ((ifp->if_flags & IFF_UP) != 0 && 1257 (ifp->if_flags & IFF_RUNNING) == 0) { 1258 /* 1259 * If interface is marked up and it is stopped, then 1260 * start it. 1261 */ 1262 if ((error = mb86960_enable(sc)) != 0) 1263 break; 1264 mb86960_init(sc); 1265 } else if ((ifp->if_flags & IFF_UP) != 0) { 1266 /* 1267 * Reset the interface to pick up changes in any other 1268 * flags that affect hardware registers. 1269 */ 1270 mb86960_setmode(sc); 1271 } 1272 #if FE_DEBUG >= 1 1273 /* "ifconfig fe0 debug" to print register dump. */ 1274 if (ifp->if_flags & IFF_DEBUG) { 1275 log(LOG_INFO, "%s: SIOCSIFFLAGS(DEBUG)\n", 1276 sc->sc_dev.dv_xname); 1277 mb86960_dump(LOG_DEBUG, sc); 1278 } 1279 #endif 1280 break; 1281 1282 case SIOCADDMULTI: 1283 case SIOCDELMULTI: 1284 if ((sc->sc_flags & FE_FLAGS_ENABLED) == 0) { 1285 error = EIO; 1286 break; 1287 } 1288 1289 /* Update our multicast list. */ 1290 error = (cmd == SIOCADDMULTI) ? 1291 ether_addmulti(ifr, &sc->sc_ec) : 1292 ether_delmulti(ifr, &sc->sc_ec); 1293 1294 if (error == ENETRESET) { 1295 /* 1296 * Multicast list has changed; set the hardware filter 1297 * accordingly. 1298 */ 1299 mb86960_setmode(sc); 1300 error = 0; 1301 } 1302 break; 1303 1304 case SIOCGIFMEDIA: 1305 case SIOCSIFMEDIA: 1306 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1307 break; 1308 1309 default: 1310 error = EINVAL; 1311 break; 1312 } 1313 1314 splx(s); 1315 return (error); 1316 } 1317 1318 /* 1319 * Retreive packet from receive buffer and send to the next level up via 1320 * ether_input(). If there is a BPF listener, give a copy to BPF, too. 1321 * Returns 0 if success, -1 if error (i.e., mbuf allocation failure). 1322 */ 1323 int 1324 mb86960_get_packet(sc, len) 1325 struct mb86960_softc *sc; 1326 int len; 1327 { 1328 bus_space_tag_t bst = sc->sc_bst; 1329 bus_space_handle_t bsh = sc->sc_bsh; 1330 struct ifnet *ifp = &sc->sc_ec.ec_if; 1331 struct mbuf *m; 1332 1333 /* Allocate a header mbuf. */ 1334 MGETHDR(m, M_DONTWAIT, MT_DATA); 1335 if (m == 0) 1336 return (0); 1337 m->m_pkthdr.rcvif = ifp; 1338 m->m_pkthdr.len = len; 1339 1340 /* The following silliness is to make NFS happy. */ 1341 #define EROUND ((sizeof(struct ether_header) + 3) & ~3) 1342 #define EOFF (EROUND - sizeof(struct ether_header)) 1343 1344 /* 1345 * Our strategy has one more problem. There is a policy on 1346 * mbuf cluster allocation. It says that we must have at 1347 * least MINCLSIZE (208 bytes) to allocate a cluster. For a 1348 * packet of a size between (MHLEN - 2) to (MINCLSIZE - 2), 1349 * our code violates the rule... 1350 * On the other hand, the current code is short, simle, 1351 * and fast, however. It does no harmful thing, just waists 1352 * some memory. Any comments? FIXME. 1353 */ 1354 1355 /* Attach a cluster if this packet doesn't fit in a normal mbuf. */ 1356 if (len > MHLEN - EOFF) { 1357 MCLGET(m, M_DONTWAIT); 1358 if ((m->m_flags & M_EXT) == 0) { 1359 m_freem(m); 1360 return (0); 1361 } 1362 } 1363 1364 /* 1365 * The following assumes there is room for the ether header in the 1366 * header mbuf. 1367 */ 1368 m->m_data += EOFF; 1369 1370 /* Set the length of this packet. */ 1371 m->m_len = len; 1372 1373 /* Get a packet. */ 1374 bus_space_read_multi_stream_2(bst, bsh, FE_BMPR8, mtod(m, u_int16_t *), 1375 (len + 1) >> 1); 1376 1377 #if NBPFILTER > 0 1378 /* 1379 * Check if there's a BPF listener on this interface. If so, hand off 1380 * the raw packet to bpf. 1381 */ 1382 if (ifp->if_bpf) 1383 bpf_mtap(ifp->if_bpf, m); 1384 #endif 1385 1386 (*ifp->if_input)(ifp, m); 1387 return (1); 1388 } 1389 1390 /* 1391 * Write an mbuf chain to the transmission buffer memory using 16 bit PIO. 1392 * Returns number of bytes actually written, including length word. 1393 * 1394 * If an mbuf chain is too long for an Ethernet frame, it is not sent. 1395 * Packets shorter than Ethernet minimum are legal, and we pad them 1396 * before sending out. An exception is "partial" packets which are 1397 * shorter than mandatory Ethernet header. 1398 * 1399 * I wrote a code for an experimental "delayed padding" technique. 1400 * When employed, it postpones the padding process for short packets. 1401 * If xmit() occured at the moment, the padding process is omitted, and 1402 * garbages are sent as pad data. If next packet is stored in the 1403 * transmission buffer before xmit(), write_mbuf() pads the previous 1404 * packet before transmitting new packet. This *may* gain the 1405 * system performance (slightly). 1406 */ 1407 void 1408 mb86960_write_mbufs(sc, m) 1409 struct mb86960_softc *sc; 1410 struct mbuf *m; 1411 { 1412 bus_space_tag_t bst = sc->sc_bst; 1413 bus_space_handle_t bsh = sc->sc_bsh; 1414 u_char *data; 1415 u_short savebyte; /* WARNING: Architecture dependent! */ 1416 int totlen, len, wantbyte; 1417 #if FE_DEBUG >= 2 1418 struct mbuf *mp; 1419 #endif 1420 1421 /* XXX thorpej 960116 - quiet bogus compiler warning. */ 1422 savebyte = 0; 1423 1424 #if FE_DELAYED_PADDING 1425 /* Do the "delayed padding." */ 1426 len = sc->txb_padding >> 1; 1427 if (len > 0) { 1428 while (--len >= 0) 1429 bus_space_write_2(bst, bsh, FE_BMPR8, 0); 1430 sc->txb_padding = 0; 1431 } 1432 #endif 1433 1434 /* We need to use m->m_pkthdr.len, so require the header */ 1435 if ((m->m_flags & M_PKTHDR) == 0) 1436 panic("mb86960_write_mbufs: no header mbuf"); 1437 1438 #if FE_DEBUG >= 2 1439 /* First, count up the total number of bytes to copy. */ 1440 for (totlen = 0, mp = m; mp != 0; mp = mp->m_next) 1441 totlen += mp->m_len; 1442 /* Check if this matches the one in the packet header. */ 1443 if (totlen != m->m_pkthdr.len) 1444 log(LOG_WARNING, "%s: packet length mismatch? (%d/%d)\n", 1445 sc->sc_dev.dv_xname, totlen, m->m_pkthdr.len); 1446 #else 1447 /* Just use the length value in the packet header. */ 1448 totlen = m->m_pkthdr.len; 1449 #endif 1450 1451 #if FE_DEBUG >= 1 1452 /* 1453 * Should never send big packets. If such a packet is passed, 1454 * it should be a bug of upper layer. We just ignore it. 1455 * ... Partial (too short) packets, neither. 1456 */ 1457 if (totlen > (ETHER_MAX_LEN - ETHER_CRC_LEN) || 1458 totlen < ETHER_HDR_LEN) { 1459 log(LOG_ERR, "%s: got a %s packet (%u bytes) to send\n", 1460 sc->sc_dev.dv_xname, 1461 totlen < ETHER_HDR_LEN ? "partial" : "big", totlen); 1462 sc->sc_ec.ec_if.if_oerrors++; 1463 return; 1464 } 1465 #endif 1466 1467 /* 1468 * Put the length word for this frame. 1469 * Does 86960 accept odd length? -- Yes. 1470 * Do we need to pad the length to minimum size by ourselves? 1471 * -- Generally yes. But for (or will be) the last 1472 * packet in the transmission buffer, we can skip the 1473 * padding process. It may gain performance slightly. FIXME. 1474 */ 1475 bus_space_write_2(bst, bsh, FE_BMPR8, 1476 max(totlen, (ETHER_MIN_LEN - ETHER_CRC_LEN))); 1477 1478 /* 1479 * Update buffer status now. 1480 * Truncate the length up to an even number, since we use outw(). 1481 */ 1482 totlen = (totlen + 1) & ~1; 1483 sc->txb_free -= FE_DATA_LEN_LEN + 1484 max(totlen, (ETHER_MIN_LEN - ETHER_CRC_LEN)); 1485 sc->txb_count++; 1486 1487 #if FE_DELAYED_PADDING 1488 /* Postpone the packet padding if necessary. */ 1489 if (totlen < (ETHER_MIN_LEN - ETHER_CRC_LEN)) 1490 sc->txb_padding = (ETHER_MIN_LEN - ETHER_CRC_LEN) - totlen; 1491 #endif 1492 1493 /* 1494 * Transfer the data from mbuf chain to the transmission buffer. 1495 * MB86960 seems to require that data be transferred as words, and 1496 * only words. So that we require some extra code to patch 1497 * over odd-length mbufs. 1498 */ 1499 wantbyte = 0; 1500 for (; m != 0; m = m->m_next) { 1501 /* Ignore empty mbuf. */ 1502 len = m->m_len; 1503 if (len == 0) 1504 continue; 1505 1506 /* Find the actual data to send. */ 1507 data = mtod(m, caddr_t); 1508 1509 /* Finish the last byte. */ 1510 if (wantbyte) { 1511 bus_space_write_2(bst, bsh, FE_BMPR8, 1512 savebyte | (*data << 8)); 1513 data++; 1514 len--; 1515 wantbyte = 0; 1516 } 1517 1518 /* Output contiguous words. */ 1519 if (len > 1) 1520 bus_space_write_multi_stream_2(bst, bsh, FE_BMPR8, 1521 (u_int16_t *)data, len >> 1); 1522 1523 /* Save remaining byte, if there is one. */ 1524 if (len & 1) { 1525 data += len & ~1; 1526 savebyte = *data; 1527 wantbyte = 1; 1528 } 1529 } 1530 1531 /* Spit the last byte, if the length is odd. */ 1532 if (wantbyte) 1533 bus_space_write_2(bst, bsh, FE_BMPR8, savebyte); 1534 1535 #if ! FE_DELAYED_PADDING 1536 /* 1537 * Pad the packet to the minimum length if necessary. 1538 */ 1539 len = ((ETHER_MIN_LEN - ETHER_CRC_LEN) >> 1) - (totlen >> 1); 1540 while (--len >= 0) 1541 bus_space_write_2(bst, bsh, FE_BMPR8, 0); 1542 #endif 1543 } 1544 1545 /* 1546 * Compute the multicast address filter from the 1547 * list of multicast addresses we need to listen to. 1548 */ 1549 void 1550 mb86960_getmcaf(ec, af) 1551 struct ethercom *ec; 1552 u_char *af; 1553 { 1554 struct ifnet *ifp = &ec->ec_if; 1555 struct ether_multi *enm; 1556 u_int32_t crc; 1557 struct ether_multistep step; 1558 1559 /* 1560 * Set up multicast address filter by passing all multicast addresses 1561 * through a crc generator, and then using the high order 6 bits as an 1562 * index into the 64 bit logical address filter. The high order bit 1563 * selects the word, while the rest of the bits select the bit within 1564 * the word. 1565 */ 1566 1567 if ((ifp->if_flags & IFF_PROMISC) != 0) 1568 goto allmulti; 1569 1570 af[0] = af[1] = af[2] = af[3] = af[4] = af[5] = af[6] = af[7] = 0x00; 1571 ETHER_FIRST_MULTI(step, ec, enm); 1572 while (enm != NULL) { 1573 if (bcmp(enm->enm_addrlo, enm->enm_addrhi, 1574 sizeof(enm->enm_addrlo)) != 0) { 1575 /* 1576 * We must listen to a range of multicast addresses. 1577 * For now, just accept all multicasts, rather than 1578 * trying to set only those filter bits needed to match 1579 * the range. (At this time, the only use of address 1580 * ranges is for IP multicast routing, for which the 1581 * range is big enough to require all bits set.) 1582 */ 1583 goto allmulti; 1584 } 1585 1586 crc = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN); 1587 1588 /* Just want the 6 most significant bits. */ 1589 crc >>= 26; 1590 1591 /* Turn on the corresponding bit in the filter. */ 1592 af[crc >> 3] |= 1 << (crc & 7); 1593 1594 ETHER_NEXT_MULTI(step, enm); 1595 } 1596 ifp->if_flags &= ~IFF_ALLMULTI; 1597 return; 1598 1599 allmulti: 1600 ifp->if_flags |= IFF_ALLMULTI; 1601 af[0] = af[1] = af[2] = af[3] = af[4] = af[5] = af[6] = af[7] = 0xff; 1602 } 1603 1604 /* 1605 * Calculate a new "multicast packet filter" and put the 86960 1606 * receiver in appropriate mode. 1607 */ 1608 void 1609 mb86960_setmode(sc) 1610 struct mb86960_softc *sc; 1611 { 1612 bus_space_tag_t bst = sc->sc_bst; 1613 bus_space_handle_t bsh = sc->sc_bsh; 1614 int flags = sc->sc_ec.ec_if.if_flags; 1615 1616 /* 1617 * If the interface is not running, we postpone the update 1618 * process for receive modes and multicast address filter 1619 * until the interface is restarted. It reduces some 1620 * complicated job on maintaining chip states. (Earlier versions 1621 * of this driver had a bug on that point...) 1622 * 1623 * To complete the trick, mb86960_init() calls mb86960_setmode() after 1624 * restarting the interface. 1625 */ 1626 if ((flags & IFF_RUNNING) == 0) 1627 return; 1628 1629 /* 1630 * Promiscuous mode is handled separately. 1631 */ 1632 if ((flags & IFF_PROMISC) != 0) { 1633 /* 1634 * Program 86960 to receive all packets on the segment 1635 * including those directed to other stations. 1636 * Multicast filter stored in MARs are ignored 1637 * under this setting, so we don't need to update it. 1638 * 1639 * Promiscuous mode is used solely by BPF, and BPF only 1640 * listens to valid (no error) packets. So, we ignore 1641 * errornous ones even in this mode. 1642 */ 1643 bus_space_write_1(bst, bsh, FE_DLCR5, 1644 sc->proto_dlcr5 | FE_D5_AFM0 | FE_D5_AFM1); 1645 sc->filter_change = 0; 1646 1647 #if FE_DEBUG >= 3 1648 log(LOG_INFO, "%s: promiscuous mode\n", sc->sc_dev.dv_xname); 1649 #endif 1650 return; 1651 } 1652 1653 /* 1654 * Turn the chip to the normal (non-promiscuous) mode. 1655 */ 1656 bus_space_write_1(bst, bsh, FE_DLCR5, sc->proto_dlcr5 | FE_D5_AFM1); 1657 1658 /* 1659 * Find the new multicast filter value. 1660 */ 1661 mb86960_getmcaf(&sc->sc_ec, sc->filter); 1662 sc->filter_change = 1; 1663 1664 #if FE_DEBUG >= 3 1665 log(LOG_INFO, 1666 "%s: address filter: [%02x %02x %02x %02x %02x %02x %02x %02x]\n", 1667 sc->sc_dev.dv_xname, 1668 sc->filter[0], sc->filter[1], sc->filter[2], sc->filter[3], 1669 sc->filter[4], sc->filter[5], sc->filter[6], sc->filter[7]); 1670 #endif 1671 1672 /* 1673 * We have to update the multicast filter in the 86960, A.S.A.P. 1674 * 1675 * Note that the DLC (Data Linc Control unit, i.e. transmitter 1676 * and receiver) must be stopped when feeding the filter, and 1677 * DLC trushes all packets in both transmission and receive 1678 * buffers when stopped. 1679 * 1680 * ... Are the above sentenses correct? I have to check the 1681 * manual of the MB86960A. FIXME. 1682 * 1683 * To reduce the packet lossage, we delay the filter update 1684 * process until buffers are empty. 1685 */ 1686 if (sc->txb_sched == 0 && sc->txb_count == 0 && 1687 (bus_space_read_1(bst, bsh, FE_DLCR1) & FE_D1_PKTRDY) == 0) { 1688 /* 1689 * Buffers are (apparently) empty. Load 1690 * the new filter value into MARs now. 1691 */ 1692 mb86960_loadmar(sc); 1693 } else { 1694 /* 1695 * Buffers are not empty. Mark that we have to update 1696 * the MARs. The new filter will be loaded by mb86960_intr() 1697 * later. 1698 */ 1699 #if FE_DEBUG >= 4 1700 log(LOG_INFO, "%s: filter change delayed\n", 1701 sc->sc_dev.dv_xname); 1702 #endif 1703 } 1704 } 1705 1706 /* 1707 * Load a new multicast address filter into MARs. 1708 * 1709 * The caller must have splnet'ed befor mb86960_loadmar. 1710 * This function starts the DLC upon return. So it can be called only 1711 * when the chip is working, i.e., from the driver's point of view, when 1712 * a device is RUNNING. (I mistook the point in previous versions.) 1713 */ 1714 void 1715 mb86960_loadmar(sc) 1716 struct mb86960_softc *sc; 1717 { 1718 bus_space_tag_t bst = sc->sc_bst; 1719 bus_space_handle_t bsh = sc->sc_bsh; 1720 1721 /* Stop the DLC (transmitter and receiver). */ 1722 bus_space_write_1(bst, bsh, FE_DLCR6, 1723 sc->proto_dlcr6 | FE_D6_DLC_DISABLE); 1724 1725 /* Select register bank 1 for MARs. */ 1726 bus_space_write_1(bst, bsh, FE_DLCR7, 1727 sc->proto_dlcr7 | FE_D7_RBS_MAR | FE_D7_POWER_UP); 1728 1729 /* Copy filter value into the registers. */ 1730 bus_space_write_region_1(bst, bsh, FE_MAR8, sc->filter, FE_FILTER_LEN); 1731 1732 /* Restore the bank selection for BMPRs (i.e., runtime registers). */ 1733 bus_space_write_1(bst, bsh, FE_DLCR7, 1734 sc->proto_dlcr7 | FE_D7_RBS_BMPR | FE_D7_POWER_UP); 1735 1736 /* Restart the DLC. */ 1737 bus_space_write_1(bst, bsh, FE_DLCR6, 1738 sc->proto_dlcr6 | FE_D6_DLC_ENABLE); 1739 1740 /* We have just updated the filter. */ 1741 sc->filter_change = 0; 1742 1743 #if FE_DEBUG >= 3 1744 log(LOG_INFO, "%s: address filter changed\n", sc->sc_dev.dv_xname); 1745 #endif 1746 } 1747 1748 /* 1749 * Enable power on the interface. 1750 */ 1751 int 1752 mb86960_enable(sc) 1753 struct mb86960_softc *sc; 1754 { 1755 1756 #if FE_DEBUG >= 3 1757 log(LOG_INFO, "%s: mb86960_enable()\n", sc->sc_dev.dv_xname); 1758 #endif 1759 1760 if ((sc->sc_flags & FE_FLAGS_ENABLED) == 0 && sc->sc_enable != NULL) { 1761 if ((*sc->sc_enable)(sc) != 0) { 1762 printf("%s: device enable failed\n", 1763 sc->sc_dev.dv_xname); 1764 return (EIO); 1765 } 1766 } 1767 1768 sc->sc_flags |= FE_FLAGS_ENABLED; 1769 return (0); 1770 } 1771 1772 /* 1773 * Disable power on the interface. 1774 */ 1775 void 1776 mb86960_disable(sc) 1777 struct mb86960_softc *sc; 1778 { 1779 1780 #if FE_DEBUG >= 3 1781 log(LOG_INFO, "%s: mb86960_disable()\n", sc->sc_dev.dv_xname); 1782 #endif 1783 1784 if ((sc->sc_flags & FE_FLAGS_ENABLED) != 0 && sc->sc_disable != NULL) { 1785 (*sc->sc_disable)(sc); 1786 sc->sc_flags &= ~FE_FLAGS_ENABLED; 1787 } 1788 } 1789 1790 /* 1791 * mbe_activate: 1792 * 1793 * Handle device activation/deactivation requests. 1794 */ 1795 int 1796 mb86960_activate(self, act) 1797 struct device *self; 1798 enum devact act; 1799 { 1800 struct mb86960_softc *sc = (struct mb86960_softc *)self; 1801 int rv = 0, s; 1802 1803 s = splnet(); 1804 switch (act) { 1805 case DVACT_ACTIVATE: 1806 rv = EOPNOTSUPP; 1807 break; 1808 1809 case DVACT_DEACTIVATE: 1810 if_deactivate(&sc->sc_ec.ec_if); 1811 break; 1812 } 1813 splx(s); 1814 return (rv); 1815 } 1816 1817 /* 1818 * mb86960_detach: 1819 * 1820 * Detach a MB86960 interface. 1821 */ 1822 int 1823 mb86960_detach(sc) 1824 struct mb86960_softc *sc; 1825 { 1826 struct ifnet *ifp = &sc->sc_ec.ec_if; 1827 1828 /* Succeed now if there's no work to do. */ 1829 if ((sc->sc_flags & FE_FLAGS_ATTACHED) == 0) 1830 return (0); 1831 1832 /* Delete all media. */ 1833 ifmedia_delete_instance(&sc->sc_media, IFM_INST_ANY); 1834 1835 #if NRND > 0 1836 /* Unhook the entropy source. */ 1837 rnd_detach_source(&sc->rnd_source); 1838 #endif 1839 ether_ifdetach(ifp); 1840 if_detach(ifp); 1841 1842 mb86960_disable(sc); 1843 return (0); 1844 } 1845 1846 #if FE_DEBUG >= 1 1847 void 1848 mb86960_dump(level, sc) 1849 int level; 1850 struct mb86960_softc *sc; 1851 { 1852 bus_space_tag_t bst = sc->sc_bst; 1853 bus_space_handle_t bsh = sc->sc_bsh; 1854 u_char save_dlcr7; 1855 1856 save_dlcr7 = bus_space_read_1(bst, bsh, FE_DLCR7); 1857 1858 log(level, "\tDLCR = %02x %02x %02x %02x %02x %02x %02x %02x\n", 1859 bus_space_read_1(bst, bsh, FE_DLCR0), 1860 bus_space_read_1(bst, bsh, FE_DLCR1), 1861 bus_space_read_1(bst, bsh, FE_DLCR2), 1862 bus_space_read_1(bst, bsh, FE_DLCR3), 1863 bus_space_read_1(bst, bsh, FE_DLCR4), 1864 bus_space_read_1(bst, bsh, FE_DLCR5), 1865 bus_space_read_1(bst, bsh, FE_DLCR6), 1866 bus_space_read_1(bst, bsh, FE_DLCR7)); 1867 1868 bus_space_write_1(bst, bsh, FE_DLCR7, 1869 (save_dlcr7 & ~FE_D7_RBS) | FE_D7_RBS_DLCR); 1870 log(level, "\t %02x %02x %02x %02x %02x %02x %02x %02x\n", 1871 bus_space_read_1(bst, bsh, FE_DLCR8), 1872 bus_space_read_1(bst, bsh, FE_DLCR9), 1873 bus_space_read_1(bst, bsh, FE_DLCR10), 1874 bus_space_read_1(bst, bsh, FE_DLCR11), 1875 bus_space_read_1(bst, bsh, FE_DLCR12), 1876 bus_space_read_1(bst, bsh, FE_DLCR13), 1877 bus_space_read_1(bst, bsh, FE_DLCR14), 1878 bus_space_read_1(bst, bsh, FE_DLCR15)); 1879 1880 bus_space_write_1(bst, bsh, FE_DLCR7, 1881 (save_dlcr7 & ~FE_D7_RBS) | FE_D7_RBS_MAR); 1882 log(level, "\tMAR = %02x %02x %02x %02x %02x %02x %02x %02x\n", 1883 bus_space_read_1(bst, bsh, FE_MAR8), 1884 bus_space_read_1(bst, bsh, FE_MAR9), 1885 bus_space_read_1(bst, bsh, FE_MAR10), 1886 bus_space_read_1(bst, bsh, FE_MAR11), 1887 bus_space_read_1(bst, bsh, FE_MAR12), 1888 bus_space_read_1(bst, bsh, FE_MAR13), 1889 bus_space_read_1(bst, bsh, FE_MAR14), 1890 bus_space_read_1(bst, bsh, FE_MAR15)); 1891 1892 bus_space_write_1(bst, bsh, FE_DLCR7, 1893 (save_dlcr7 & ~FE_D7_RBS) | FE_D7_RBS_BMPR); 1894 log(level, 1895 "\tBMPR = xx xx %02x %02x %02x %02x %02x %02x %02x %02x xx %02x\n", 1896 bus_space_read_1(bst, bsh, FE_BMPR10), 1897 bus_space_read_1(bst, bsh, FE_BMPR11), 1898 bus_space_read_1(bst, bsh, FE_BMPR12), 1899 bus_space_read_1(bst, bsh, FE_BMPR13), 1900 bus_space_read_1(bst, bsh, FE_BMPR14), 1901 bus_space_read_1(bst, bsh, FE_BMPR15), 1902 bus_space_read_1(bst, bsh, FE_BMPR16), 1903 bus_space_read_1(bst, bsh, FE_BMPR17), 1904 bus_space_read_1(bst, bsh, FE_BMPR19)); 1905 1906 bus_space_write_1(bst, bsh, FE_DLCR7, save_dlcr7); 1907 } 1908 #endif 1909
Indexes created Sun Oct 26 17:10:13 GMT 2025