1 /* $NetBSD: mii_physubr.c,v 1.42 2004/04/11 15:47:33 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * Subroutines common to all PHYs. 42 */ 43 44 #include <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: mii_physubr.c,v 1.42 2004/04/11 15:47:33 thorpej Exp $"); 46 47 #include <sys/param.h> 48 #include <sys/device.h> 49 #include <sys/systm.h> 50 #include <sys/kernel.h> 51 #include <sys/socket.h> 52 #include <sys/errno.h> 53 #include <sys/proc.h> 54 55 #include <net/if.h> 56 #include <net/if_media.h> 57 #include <net/route.h> 58 59 #include <dev/mii/mii.h> 60 #include <dev/mii/miivar.h> 61 62 /* 63 * Media to register setting conversion table. Order matters. 64 */ 65 const struct mii_media mii_media_table[MII_NMEDIA] = { 66 /* None */ 67 { BMCR_ISO, ANAR_CSMA, 68 0, }, 69 70 /* 10baseT */ 71 { BMCR_S10, ANAR_CSMA|ANAR_10, 72 0, }, 73 74 /* 10baseT-FDX */ 75 { BMCR_S10|BMCR_FDX, ANAR_CSMA|ANAR_10_FD, 76 0, }, 77 78 /* 100baseT4 */ 79 { BMCR_S100, ANAR_CSMA|ANAR_T4, 80 0, }, 81 82 /* 100baseTX */ 83 { BMCR_S100, ANAR_CSMA|ANAR_TX, 84 0, }, 85 86 /* 100baseTX-FDX */ 87 { BMCR_S100|BMCR_FDX, ANAR_CSMA|ANAR_TX_FD, 88 0, }, 89 90 /* 1000baseX */ 91 { BMCR_S1000, ANAR_CSMA, 92 0, }, 93 94 /* 1000baseX-FDX */ 95 { BMCR_S1000|BMCR_FDX, ANAR_CSMA, 96 0, }, 97 98 /* 1000baseT */ 99 { BMCR_S1000, ANAR_CSMA, 100 GTCR_ADV_1000THDX }, 101 102 /* 1000baseT-FDX */ 103 { BMCR_S1000, ANAR_CSMA, 104 GTCR_ADV_1000TFDX }, 105 }; 106 107 void mii_phy_auto_timeout(void *); 108 109 void 110 mii_phy_setmedia(struct mii_softc *sc) 111 { 112 struct mii_data *mii = sc->mii_pdata; 113 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 114 int bmcr, anar, gtcr; 115 116 if (IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO) { 117 /* 118 * Force renegotiation if MIIF_DOPAUSE. 119 * 120 * XXX This is only necessary because many NICs don't 121 * XXX advertise PAUSE capabilities at boot time. Maybe 122 * XXX we should force this only once? 123 */ 124 if ((PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) == 0 || 125 (sc->mii_flags & (MIIF_FORCEANEG|MIIF_DOPAUSE))) 126 (void) mii_phy_auto(sc, 1); 127 return; 128 } 129 130 /* 131 * Table index is stored in the media entry. 132 */ 133 134 #ifdef DIAGNOSTIC 135 if (ife->ifm_data < 0 || ife->ifm_data >= MII_NMEDIA) 136 panic("mii_phy_setmedia"); 137 #endif 138 139 anar = mii_media_table[ife->ifm_data].mm_anar; 140 bmcr = mii_media_table[ife->ifm_data].mm_bmcr; 141 gtcr = mii_media_table[ife->ifm_data].mm_gtcr; 142 143 if (mii->mii_media.ifm_media & IFM_ETH_MASTER) { 144 switch (IFM_SUBTYPE(ife->ifm_media)) { 145 case IFM_1000_T: 146 gtcr |= GTCR_MAN_MS|GTCR_ADV_MS; 147 break; 148 149 default: 150 panic("mii_phy_setmedia: MASTER on wrong media"); 151 } 152 } 153 154 if (mii->mii_media.ifm_media & IFM_FLOW) { 155 if (sc->mii_flags & MIIF_IS_1000X) 156 anar |= ANAR_X_PAUSE_SYM | ANAR_X_PAUSE_ASYM; 157 else { 158 anar |= ANAR_FC; 159 /* XXX Only 1000BASE-T has PAUSE_ASYM? */ 160 if ((sc->mii_flags & MIIF_HAVE_GTCR) && 161 (sc->mii_extcapabilities & 162 (EXTSR_1000THDX|EXTSR_1000TFDX))) 163 anar |= ANAR_X_PAUSE_ASYM; 164 } 165 } 166 167 if (ife->ifm_media & IFM_LOOP) 168 bmcr |= BMCR_LOOP; 169 170 PHY_WRITE(sc, MII_ANAR, anar); 171 PHY_WRITE(sc, MII_BMCR, bmcr); 172 if (sc->mii_flags & MIIF_HAVE_GTCR) 173 PHY_WRITE(sc, MII_100T2CR, gtcr); 174 } 175 176 int 177 mii_phy_auto(struct mii_softc *sc, int waitfor) 178 { 179 int i; 180 181 if ((sc->mii_flags & MIIF_DOINGAUTO) == 0) { 182 /* 183 * Check for 1000BASE-X. Autonegotiation is a bit 184 * different on such devices. 185 */ 186 if (sc->mii_flags & MIIF_IS_1000X) { 187 uint16_t anar = 0; 188 189 if (sc->mii_extcapabilities & EXTSR_1000XFDX) 190 anar |= ANAR_X_FD; 191 if (sc->mii_extcapabilities & EXTSR_1000XHDX) 192 anar |= ANAR_X_HD; 193 194 if (sc->mii_flags & MIIF_DOPAUSE) { 195 /* XXX Asymmetric vs. symmetric? */ 196 anar |= ANLPAR_X_PAUSE_TOWARDS; 197 } 198 199 PHY_WRITE(sc, MII_ANAR, anar); 200 } else { 201 uint16_t anar; 202 203 anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | 204 ANAR_CSMA; 205 if (sc->mii_flags & MIIF_DOPAUSE) { 206 anar |= ANAR_FC; 207 /* XXX Only 1000BASE-T has PAUSE_ASYM? */ 208 if ((sc->mii_flags & MIIF_HAVE_GTCR) && 209 (sc->mii_extcapabilities & 210 (EXTSR_1000THDX|EXTSR_1000TFDX))) 211 anar |= ANAR_X_PAUSE_ASYM; 212 } 213 PHY_WRITE(sc, MII_ANAR, anar); 214 if (sc->mii_flags & MIIF_HAVE_GTCR) { 215 uint16_t gtcr = 0; 216 217 if (sc->mii_extcapabilities & EXTSR_1000TFDX) 218 gtcr |= GTCR_ADV_1000TFDX; 219 if (sc->mii_extcapabilities & EXTSR_1000THDX) 220 gtcr |= GTCR_ADV_1000THDX; 221 222 PHY_WRITE(sc, MII_100T2CR, gtcr); 223 } 224 } 225 PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 226 } 227 228 if (waitfor) { 229 /* Wait 500ms for it to complete. */ 230 for (i = 0; i < 500; i++) { 231 if (PHY_READ(sc, MII_BMSR) & BMSR_ACOMP) 232 return (0); 233 delay(1000); 234 } 235 236 /* 237 * Don't need to worry about clearing MIIF_DOINGAUTO. 238 * If that's set, a timeout is pending, and it will 239 * clear the flag. 240 */ 241 return (EIO); 242 } 243 244 /* 245 * Just let it finish asynchronously. This is for the benefit of 246 * the tick handler driving autonegotiation. Don't want 500ms 247 * delays all the time while the system is running! 248 */ 249 if (sc->mii_flags & MIIF_AUTOTSLEEP) { 250 sc->mii_flags |= MIIF_DOINGAUTO; 251 tsleep(&sc->mii_flags, PZERO, "miiaut", hz >> 1); 252 mii_phy_auto_timeout(sc); 253 } else if ((sc->mii_flags & MIIF_DOINGAUTO) == 0) { 254 sc->mii_flags |= MIIF_DOINGAUTO; 255 callout_reset(&sc->mii_nway_ch, hz >> 1, 256 mii_phy_auto_timeout, sc); 257 } 258 return (EJUSTRETURN); 259 } 260 261 void 262 mii_phy_auto_timeout(void *arg) 263 { 264 struct mii_softc *sc = arg; 265 int s; 266 267 if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0) 268 return; 269 270 s = splnet(); 271 sc->mii_flags &= ~MIIF_DOINGAUTO; 272 273 /* Update the media status. */ 274 (void) PHY_SERVICE(sc, sc->mii_pdata, MII_POLLSTAT); 275 splx(s); 276 } 277 278 int 279 mii_phy_tick(struct mii_softc *sc) 280 { 281 struct mii_data *mii = sc->mii_pdata; 282 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 283 int reg; 284 285 /* Just bail now if the interface is down. */ 286 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 287 return (EJUSTRETURN); 288 289 /* 290 * If we're not doing autonegotiation, we don't need to do 291 * any extra work here. However, we need to check the link 292 * status so we can generate an announcement if the status 293 * changes. 294 */ 295 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 296 return (0); 297 298 /* Read the status register twice; BMSR_LINK is latch-low. */ 299 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 300 if (reg & BMSR_LINK) { 301 /* 302 * See above. 303 */ 304 return (0); 305 } 306 307 /* 308 * Only retry autonegotiation every N seconds. 309 */ 310 KASSERT(sc->mii_anegticks != 0); 311 if (++sc->mii_ticks != sc->mii_anegticks) 312 return (EJUSTRETURN); 313 314 sc->mii_ticks = 0; 315 PHY_RESET(sc); 316 317 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 318 return (EJUSTRETURN); 319 320 /* 321 * Might need to generate a status message if autonegotiation 322 * failed. 323 */ 324 return (0); 325 } 326 327 void 328 mii_phy_reset(struct mii_softc *sc) 329 { 330 int reg, i; 331 332 if (sc->mii_flags & MIIF_NOISOLATE) 333 reg = BMCR_RESET; 334 else 335 reg = BMCR_RESET | BMCR_ISO; 336 PHY_WRITE(sc, MII_BMCR, reg); 337 338 /* 339 * It is best to allow a little time for the reset to settle 340 * in before we start polling the BMCR again. Notably, the 341 * DP83840A manual states that there should be a 500us delay 342 * between asserting software reset and attempting MII serial 343 * operations. Also, a DP83815 can get into a bad state on 344 * cable removal and reinsertion if we do not delay here. 345 */ 346 delay(500); 347 348 /* Wait another 100ms for it to complete. */ 349 for (i = 0; i < 100; i++) { 350 reg = PHY_READ(sc, MII_BMCR); 351 if ((reg & BMCR_RESET) == 0) 352 break; 353 delay(1000); 354 } 355 356 if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0)) 357 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 358 } 359 360 void 361 mii_phy_down(struct mii_softc *sc) 362 { 363 364 if (sc->mii_flags & MIIF_DOINGAUTO) { 365 sc->mii_flags &= ~MIIF_DOINGAUTO; 366 callout_stop(&sc->mii_nway_ch); 367 } 368 } 369 370 void 371 mii_phy_status(struct mii_softc *sc) 372 { 373 374 PHY_STATUS(sc); 375 } 376 377 void 378 mii_phy_update(struct mii_softc *sc, int cmd) 379 { 380 struct mii_data *mii = sc->mii_pdata; 381 int announce, s; 382 383 if (sc->mii_media_active != mii->mii_media_active || 384 sc->mii_media_status != mii->mii_media_status || 385 cmd == MII_MEDIACHG) { 386 announce = mii_phy_statusmsg(sc); 387 (*mii->mii_statchg)(sc->mii_dev.dv_parent); 388 sc->mii_media_active = mii->mii_media_active; 389 sc->mii_media_status = mii->mii_media_status; 390 391 if (announce) { 392 s = splnet(); 393 rt_ifmsg(mii->mii_ifp); 394 splx(s); 395 } 396 } 397 } 398 399 int 400 mii_phy_statusmsg(struct mii_softc *sc) 401 { 402 struct mii_data *mii = sc->mii_pdata; 403 struct ifnet *ifp = mii->mii_ifp; 404 int link_state, announce = 0; 405 u_int baudrate; 406 407 if (mii->mii_media_status & IFM_AVALID) { 408 if (mii->mii_media_status & IFM_ACTIVE) 409 link_state = LINK_STATE_UP; 410 else 411 link_state = LINK_STATE_DOWN; 412 } else 413 link_state = LINK_STATE_UNKNOWN; 414 415 baudrate = ifmedia_baudrate(mii->mii_media_active); 416 417 if (link_state != ifp->if_link_state) { 418 ifp->if_link_state = link_state; 419 /* 420 * XXX Right here we'd like to notify protocols 421 * XXX that the link status has changed, so that 422 * XXX e.g. Duplicate Address Detection can restart. 423 */ 424 announce = 1; 425 } 426 427 if (baudrate != ifp->if_baudrate) { 428 ifp->if_baudrate = baudrate; 429 announce = 1; 430 } 431 432 return (announce); 433 } 434 435 /* 436 * Initialize generic PHY media based on BMSR, called when a PHY is 437 * attached. We expect to be set up to print a comma-separated list 438 * of media names. Does not print a newline. 439 */ 440 void 441 mii_phy_add_media(struct mii_softc *sc) 442 { 443 struct mii_data *mii = sc->mii_pdata; 444 const char *sep = ""; 445 int fdx = 0; 446 447 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 448 #define PRINT(n) aprint_normal("%s%s", sep, (n)); sep = ", " 449 450 if ((sc->mii_flags & MIIF_NOISOLATE) == 0) 451 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 452 MII_MEDIA_NONE); 453 454 /* 455 * There are different interpretations for the bits in 456 * HomePNA PHYs. And there is really only one media type 457 * that is supported. 458 */ 459 if (sc->mii_flags & MIIF_IS_HPNA) { 460 if (sc->mii_capabilities & BMSR_10THDX) { 461 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_HPNA_1, 0, 462 sc->mii_inst), 463 MII_MEDIA_10_T); 464 PRINT("HomePNA1"); 465 } 466 return; 467 } 468 469 if (sc->mii_capabilities & BMSR_10THDX) { 470 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst), 471 MII_MEDIA_10_T); 472 PRINT("10baseT"); 473 } 474 if (sc->mii_capabilities & BMSR_10TFDX) { 475 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst), 476 MII_MEDIA_10_T_FDX); 477 PRINT("10baseT-FDX"); 478 fdx = 1; 479 } 480 if (sc->mii_capabilities & BMSR_100TXHDX) { 481 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst), 482 MII_MEDIA_100_TX); 483 PRINT("100baseTX"); 484 } 485 if (sc->mii_capabilities & BMSR_100TXFDX) { 486 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst), 487 MII_MEDIA_100_TX_FDX); 488 PRINT("100baseTX-FDX"); 489 fdx = 1; 490 } 491 if (sc->mii_capabilities & BMSR_100T4) { 492 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, sc->mii_inst), 493 MII_MEDIA_100_T4); 494 PRINT("100baseT4"); 495 } 496 497 if (sc->mii_extcapabilities & EXTSR_MEDIAMASK) { 498 /* 499 * XXX Right now only handle 1000SX and 1000TX. Need 500 * XXX to handle 1000LX and 1000CX some how. 501 * 502 * Note since it can take 5 seconds to auto-negotiate 503 * a gigabit link, we make anegticks 10 seconds for 504 * all the gigabit media types. 505 */ 506 if (sc->mii_extcapabilities & EXTSR_1000XHDX) { 507 sc->mii_anegticks = 10; 508 sc->mii_flags |= MIIF_IS_1000X; 509 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, 510 sc->mii_inst), MII_MEDIA_1000_X); 511 PRINT("1000baseSX"); 512 } 513 if (sc->mii_extcapabilities & EXTSR_1000XFDX) { 514 sc->mii_anegticks = 10; 515 sc->mii_flags |= MIIF_IS_1000X; 516 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, 517 sc->mii_inst), MII_MEDIA_1000_X_FDX); 518 PRINT("1000baseSX-FDX"); 519 fdx = 1; 520 } 521 522 /* 523 * 1000baseT media needs to be able to manipulate 524 * master/slave mode. We set IFM_ETH_MASTER in 525 * the "don't care mask" and filter it out when 526 * the media is set. 527 * 528 * All 1000baseT PHYs have a 1000baseT control register. 529 */ 530 if (sc->mii_extcapabilities & EXTSR_1000THDX) { 531 sc->mii_anegticks = 10; 532 sc->mii_flags |= MIIF_HAVE_GTCR; 533 mii->mii_media.ifm_mask |= IFM_ETH_MASTER; 534 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, 0, 535 sc->mii_inst), MII_MEDIA_1000_T); 536 PRINT("1000baseT"); 537 } 538 if (sc->mii_extcapabilities & EXTSR_1000TFDX) { 539 sc->mii_anegticks = 10; 540 sc->mii_flags |= MIIF_HAVE_GTCR; 541 mii->mii_media.ifm_mask |= IFM_ETH_MASTER; 542 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, IFM_FDX, 543 sc->mii_inst), MII_MEDIA_1000_T_FDX); 544 PRINT("1000baseT-FDX"); 545 fdx = 1; 546 } 547 } 548 549 if (sc->mii_capabilities & BMSR_ANEG) { 550 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 551 MII_NMEDIA); /* intentionally invalid index */ 552 PRINT("auto"); 553 } 554 #undef ADD 555 #undef PRINT 556 if (fdx != 0 && (sc->mii_flags & MIIF_DOPAUSE)) 557 mii->mii_media.ifm_mask |= IFM_ETH_FMASK; 558 } 559 560 void 561 mii_phy_delete_media(struct mii_softc *sc) 562 { 563 struct mii_data *mii = sc->mii_pdata; 564 565 ifmedia_delete_instance(&mii->mii_media, sc->mii_inst); 566 } 567 568 int 569 mii_phy_activate(struct device *self, enum devact act) 570 { 571 int rv = 0; 572 573 switch (act) { 574 case DVACT_ACTIVATE: 575 rv = EOPNOTSUPP; 576 break; 577 578 case DVACT_DEACTIVATE: 579 /* Nothing special to do. */ 580 break; 581 } 582 583 return (rv); 584 } 585 586 /* ARGSUSED1 */ 587 int 588 mii_phy_detach(struct device *self, int flags) 589 { 590 struct mii_softc *sc = (void *) self; 591 592 if (sc->mii_flags & MIIF_DOINGAUTO) 593 callout_stop(&sc->mii_nway_ch); 594 595 mii_phy_delete_media(sc); 596 597 return (0); 598 } 599 600 const struct mii_phydesc * 601 mii_phy_match(const struct mii_attach_args *ma, const struct mii_phydesc *mpd) 602 { 603 604 for (; mpd->mpd_name != NULL; mpd++) { 605 if (MII_OUI(ma->mii_id1, ma->mii_id2) == mpd->mpd_oui && 606 MII_MODEL(ma->mii_id2) == mpd->mpd_model) 607 return (mpd); 608 } 609 return (NULL); 610 } 611 612 /* 613 * Return the flow control status flag from MII_ANAR & MII_ANLPAR. 614 */ 615 u_int 616 mii_phy_flowstatus(struct mii_softc *sc) 617 { 618 u_int anar, anlpar; 619 620 if ((sc->mii_flags & MIIF_DOPAUSE) == 0) 621 return (0); 622 623 anar = PHY_READ(sc, MII_ANAR); 624 anlpar = PHY_READ(sc, MII_ANLPAR); 625 626 if ((anar & ANAR_X_PAUSE_SYM) & (anlpar & ANLPAR_X_PAUSE_SYM)) 627 return (IFM_FLOW|IFM_ETH_TXPAUSE|IFM_ETH_RXPAUSE); 628 629 if ((anar & ANAR_X_PAUSE_SYM) == 0) { 630 if ((anar & ANAR_X_PAUSE_ASYM) && 631 ((anlpar & 632 ANLPAR_X_PAUSE_TOWARDS) == ANLPAR_X_PAUSE_TOWARDS)) 633 return (IFM_FLOW|IFM_ETH_TXPAUSE); 634 else 635 return (0); 636 } 637 638 if ((anar & ANAR_X_PAUSE_ASYM) == 0) { 639 if (anlpar & ANLPAR_X_PAUSE_SYM) 640 return (IFM_FLOW|IFM_ETH_TXPAUSE|IFM_ETH_RXPAUSE); 641 else 642 return (0); 643 } 644 645 switch ((anlpar & ANLPAR_X_PAUSE_TOWARDS)) { 646 case ANLPAR_X_PAUSE_NONE: 647 return (0); 648 649 case ANLPAR_X_PAUSE_ASYM: 650 return (IFM_FLOW|IFM_ETH_RXPAUSE); 651 652 default: 653 return (IFM_FLOW|IFM_ETH_RXPAUSE|IFM_ETH_TXPAUSE); 654 } 655 /* NOTREACHED */ 656 } 657