Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/etherswitch/ukswitch/ukswitch.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2013 Luiz Otavio O Souza. 5 * Copyright (c) 2011-2012 Stefan Bethke. 6 * Copyright (c) 2012 Adrian Chadd. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD$ 31 */ 32 33 #include <sys/param.h> 34 #include <sys/bus.h> 35 #include <sys/errno.h> 36 #include <sys/kernel.h> 37 #include <sys/lock.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/mutex.h> 41 #include <sys/socket.h> 42 #include <sys/sockio.h> 43 #include <sys/sysctl.h> 44 #include <sys/systm.h> 45 46 #include <net/if.h> 47 #include <net/if_var.h> 48 #include <net/ethernet.h> 49 #include <net/if_media.h> 50 #include <net/if_types.h> 51 52 #include <machine/bus.h> 53 #include <dev/mii/mii.h> 54 #include <dev/mii/miivar.h> 55 #include <dev/mdio/mdio.h> 56 57 #include <dev/etherswitch/etherswitch.h> 58 59 #include "mdio_if.h" 60 #include "miibus_if.h" 61 #include "etherswitch_if.h" 62 63 MALLOC_DECLARE(M_UKSWITCH); 64 MALLOC_DEFINE(M_UKSWITCH, "ukswitch", "ukswitch data structures"); 65 66 struct ukswitch_softc { 67 struct mtx sc_mtx; /* serialize access to softc */ 68 device_t sc_dev; 69 int media; /* cpu port media */ 70 int cpuport; /* which PHY is connected to the CPU */ 71 int phymask; /* PHYs we manage */ 72 int phyoffset; /* PHYs register offset */ 73 int numports; /* number of ports */ 74 int ifpport[MII_NPHY]; 75 int *portphy; 76 char **ifname; 77 device_t **miibus; 78 if_t *ifp; 79 struct callout callout_tick; 80 etherswitch_info_t info; 81 }; 82 83 #define UKSWITCH_LOCK(_sc) \ 84 mtx_lock(&(_sc)->sc_mtx) 85 #define UKSWITCH_UNLOCK(_sc) \ 86 mtx_unlock(&(_sc)->sc_mtx) 87 #define UKSWITCH_LOCK_ASSERT(_sc, _what) \ 88 mtx_assert(&(_sc)->sc_mtx, (_what)) 89 #define UKSWITCH_TRYLOCK(_sc) \ 90 mtx_trylock(&(_sc)->sc_mtx) 91 92 #if defined(DEBUG) 93 #define DPRINTF(dev, args...) device_printf(dev, args) 94 #else 95 #define DPRINTF(dev, args...) 96 #endif 97 98 static inline int ukswitch_portforphy(struct ukswitch_softc *, int); 99 static void ukswitch_tick(void *); 100 static int ukswitch_ifmedia_upd(if_t ); 101 static void ukswitch_ifmedia_sts(if_t , struct ifmediareq *); 102 103 static int 104 ukswitch_probe(device_t dev) 105 { 106 struct ukswitch_softc *sc; 107 108 sc = device_get_softc(dev); 109 bzero(sc, sizeof(*sc)); 110 111 device_set_desc_copy(dev, "Generic MDIO switch driver"); 112 return (BUS_PROBE_DEFAULT); 113 } 114 115 static int 116 ukswitch_attach_phys(struct ukswitch_softc *sc) 117 { 118 int phy, port = 0, err = 0; 119 char name[IFNAMSIZ]; 120 121 /* PHYs need an interface, so we generate a dummy one */ 122 snprintf(name, IFNAMSIZ, "%sport", device_get_nameunit(sc->sc_dev)); 123 for (phy = 0; phy < MII_NPHY; phy++) { 124 if (((1 << phy) & sc->phymask) == 0) 125 continue; 126 sc->ifpport[phy] = port; 127 sc->portphy[port] = phy; 128 sc->ifp[port] = if_alloc(IFT_ETHER); 129 if (sc->ifp[port] == NULL) { 130 device_printf(sc->sc_dev, "couldn't allocate ifnet structure\n"); 131 err = ENOMEM; 132 break; 133 } 134 135 if_setsoftc(sc->ifp[port], sc); 136 if_setflags(sc->ifp[port], IFF_UP | IFF_BROADCAST | 137 IFF_DRV_RUNNING | IFF_SIMPLEX); 138 sc->ifname[port] = malloc(strlen(name)+1, M_UKSWITCH, M_WAITOK); 139 bcopy(name, sc->ifname[port], strlen(name)+1); 140 if_initname(sc->ifp[port], sc->ifname[port], port); 141 sc->miibus[port] = malloc(sizeof(device_t), M_UKSWITCH, 142 M_WAITOK | M_ZERO); 143 err = mii_attach(sc->sc_dev, sc->miibus[port], sc->ifp[port], 144 ukswitch_ifmedia_upd, ukswitch_ifmedia_sts, \ 145 BMSR_DEFCAPMASK, phy + sc->phyoffset, MII_OFFSET_ANY, 0); 146 DPRINTF(sc->sc_dev, "%s attached to pseudo interface %s\n", 147 device_get_nameunit(*sc->miibus[port]), 148 if_name(sc->ifp[port])); 149 if (err != 0) { 150 device_printf(sc->sc_dev, 151 "attaching PHY %d failed\n", 152 phy); 153 break; 154 } 155 sc->info.es_nports = port + 1; 156 if (++port >= sc->numports) 157 break; 158 } 159 return (err); 160 } 161 162 static int 163 ukswitch_attach(device_t dev) 164 { 165 struct ukswitch_softc *sc; 166 int err = 0; 167 168 sc = device_get_softc(dev); 169 170 sc->sc_dev = dev; 171 mtx_init(&sc->sc_mtx, "ukswitch", NULL, MTX_DEF); 172 strlcpy(sc->info.es_name, device_get_desc(dev), 173 sizeof(sc->info.es_name)); 174 175 /* XXX Defaults */ 176 sc->numports = 6; 177 sc->phymask = 0x0f; 178 sc->phyoffset = 0; 179 sc->cpuport = -1; 180 sc->media = 100; 181 182 (void) resource_int_value(device_get_name(dev), device_get_unit(dev), 183 "numports", &sc->numports); 184 (void) resource_int_value(device_get_name(dev), device_get_unit(dev), 185 "phymask", &sc->phymask); 186 (void) resource_int_value(device_get_name(dev), device_get_unit(dev), 187 "phyoffset", &sc->phyoffset); 188 (void) resource_int_value(device_get_name(dev), device_get_unit(dev), 189 "cpuport", &sc->cpuport); 190 (void) resource_int_value(device_get_name(dev), device_get_unit(dev), 191 "media", &sc->media); 192 193 /* Support only fast and giga ethernet. */ 194 if (sc->media != 100 && sc->media != 1000) 195 sc->media = 100; 196 197 if (sc->cpuport != -1) 198 /* Always attach the cpu port. */ 199 sc->phymask |= (1 << sc->cpuport); 200 201 /* We do not support any vlan groups. */ 202 sc->info.es_nvlangroups = 0; 203 204 sc->ifp = malloc(sizeof(if_t ) * sc->numports, M_UKSWITCH, 205 M_WAITOK | M_ZERO); 206 sc->ifname = malloc(sizeof(char *) * sc->numports, M_UKSWITCH, 207 M_WAITOK | M_ZERO); 208 sc->miibus = malloc(sizeof(device_t *) * sc->numports, M_UKSWITCH, 209 M_WAITOK | M_ZERO); 210 sc->portphy = malloc(sizeof(int) * sc->numports, M_UKSWITCH, 211 M_WAITOK | M_ZERO); 212 213 /* 214 * Attach the PHYs and complete the bus enumeration. 215 */ 216 err = ukswitch_attach_phys(sc); 217 if (err != 0) 218 return (err); 219 220 bus_generic_probe(dev); 221 bus_enumerate_hinted_children(dev); 222 err = bus_generic_attach(dev); 223 if (err != 0) 224 return (err); 225 226 callout_init(&sc->callout_tick, 0); 227 228 ukswitch_tick(sc); 229 230 return (err); 231 } 232 233 static int 234 ukswitch_detach(device_t dev) 235 { 236 struct ukswitch_softc *sc = device_get_softc(dev); 237 int i, port; 238 239 callout_drain(&sc->callout_tick); 240 241 for (i=0; i < MII_NPHY; i++) { 242 if (((1 << i) & sc->phymask) == 0) 243 continue; 244 port = ukswitch_portforphy(sc, i); 245 if (sc->miibus[port] != NULL) 246 device_delete_child(dev, (*sc->miibus[port])); 247 if (sc->ifp[port] != NULL) 248 if_free(sc->ifp[port]); 249 free(sc->ifname[port], M_UKSWITCH); 250 free(sc->miibus[port], M_UKSWITCH); 251 } 252 253 free(sc->portphy, M_UKSWITCH); 254 free(sc->miibus, M_UKSWITCH); 255 free(sc->ifname, M_UKSWITCH); 256 free(sc->ifp, M_UKSWITCH); 257 258 bus_generic_detach(dev); 259 mtx_destroy(&sc->sc_mtx); 260 261 return (0); 262 } 263 264 /* 265 * Convert PHY number to port number. 266 */ 267 static inline int 268 ukswitch_portforphy(struct ukswitch_softc *sc, int phy) 269 { 270 271 return (sc->ifpport[phy]); 272 } 273 274 static inline struct mii_data * 275 ukswitch_miiforport(struct ukswitch_softc *sc, int port) 276 { 277 278 if (port < 0 || port > sc->numports) 279 return (NULL); 280 return (device_get_softc(*sc->miibus[port])); 281 } 282 283 static inline if_t 284 ukswitch_ifpforport(struct ukswitch_softc *sc, int port) 285 { 286 287 if (port < 0 || port > sc->numports) 288 return (NULL); 289 return (sc->ifp[port]); 290 } 291 292 /* 293 * Poll the status for all PHYs. 294 */ 295 static void 296 ukswitch_miipollstat(struct ukswitch_softc *sc) 297 { 298 int i, port; 299 struct mii_data *mii; 300 struct mii_softc *miisc; 301 302 UKSWITCH_LOCK_ASSERT(sc, MA_NOTOWNED); 303 304 for (i = 0; i < MII_NPHY; i++) { 305 if (((1 << i) & sc->phymask) == 0) 306 continue; 307 port = ukswitch_portforphy(sc, i); 308 if ((*sc->miibus[port]) == NULL) 309 continue; 310 mii = device_get_softc(*sc->miibus[port]); 311 LIST_FOREACH(miisc, &mii->mii_phys, mii_list) { 312 if (IFM_INST(mii->mii_media.ifm_cur->ifm_media) != 313 miisc->mii_inst) 314 continue; 315 ukphy_status(miisc); 316 mii_phy_update(miisc, MII_POLLSTAT); 317 } 318 } 319 } 320 321 static void 322 ukswitch_tick(void *arg) 323 { 324 struct ukswitch_softc *sc = arg; 325 326 ukswitch_miipollstat(sc); 327 callout_reset(&sc->callout_tick, hz, ukswitch_tick, sc); 328 } 329 330 static void 331 ukswitch_lock(device_t dev) 332 { 333 struct ukswitch_softc *sc = device_get_softc(dev); 334 335 UKSWITCH_LOCK_ASSERT(sc, MA_NOTOWNED); 336 UKSWITCH_LOCK(sc); 337 } 338 339 static void 340 ukswitch_unlock(device_t dev) 341 { 342 struct ukswitch_softc *sc = device_get_softc(dev); 343 344 UKSWITCH_LOCK_ASSERT(sc, MA_OWNED); 345 UKSWITCH_UNLOCK(sc); 346 } 347 348 static etherswitch_info_t * 349 ukswitch_getinfo(device_t dev) 350 { 351 struct ukswitch_softc *sc = device_get_softc(dev); 352 353 return (&sc->info); 354 } 355 356 static int 357 ukswitch_getport(device_t dev, etherswitch_port_t *p) 358 { 359 struct ukswitch_softc *sc = device_get_softc(dev); 360 struct mii_data *mii; 361 struct ifmediareq *ifmr = &p->es_ifmr; 362 int err, phy; 363 364 if (p->es_port < 0 || p->es_port >= sc->numports) 365 return (ENXIO); 366 p->es_pvid = 0; 367 368 phy = sc->portphy[p->es_port]; 369 mii = ukswitch_miiforport(sc, p->es_port); 370 if (sc->cpuport != -1 && phy == sc->cpuport) { 371 /* fill in fixed values for CPU port */ 372 p->es_flags |= ETHERSWITCH_PORT_CPU; 373 ifmr->ifm_count = 0; 374 if (sc->media == 100) 375 ifmr->ifm_current = ifmr->ifm_active = 376 IFM_ETHER | IFM_100_TX | IFM_FDX; 377 else 378 ifmr->ifm_current = ifmr->ifm_active = 379 IFM_ETHER | IFM_1000_T | IFM_FDX; 380 ifmr->ifm_mask = 0; 381 ifmr->ifm_status = IFM_ACTIVE | IFM_AVALID; 382 } else if (mii != NULL) { 383 err = ifmedia_ioctl(mii->mii_ifp, &p->es_ifr, 384 &mii->mii_media, SIOCGIFMEDIA); 385 if (err) 386 return (err); 387 } else { 388 return (ENXIO); 389 } 390 return (0); 391 } 392 393 static int 394 ukswitch_setport(device_t dev, etherswitch_port_t *p) 395 { 396 struct ukswitch_softc *sc = device_get_softc(dev); 397 struct ifmedia *ifm; 398 struct mii_data *mii; 399 if_t ifp; 400 int err; 401 402 if (p->es_port < 0 || p->es_port >= sc->numports) 403 return (ENXIO); 404 405 if (sc->portphy[p->es_port] == sc->cpuport) 406 return (ENXIO); 407 408 mii = ukswitch_miiforport(sc, p->es_port); 409 if (mii == NULL) 410 return (ENXIO); 411 412 ifp = ukswitch_ifpforport(sc, p->es_port); 413 414 ifm = &mii->mii_media; 415 err = ifmedia_ioctl(ifp, &p->es_ifr, ifm, SIOCSIFMEDIA); 416 return (err); 417 } 418 419 static int 420 ukswitch_getvgroup(device_t dev, etherswitch_vlangroup_t *vg) 421 { 422 423 /* Not supported. */ 424 vg->es_vid = 0; 425 vg->es_member_ports = 0; 426 vg->es_untagged_ports = 0; 427 vg->es_fid = 0; 428 return (0); 429 } 430 431 static int 432 ukswitch_setvgroup(device_t dev, etherswitch_vlangroup_t *vg) 433 { 434 435 /* Not supported. */ 436 return (0); 437 } 438 439 static void 440 ukswitch_statchg(device_t dev) 441 { 442 443 DPRINTF(dev, "%s\n", __func__); 444 } 445 446 static int 447 ukswitch_ifmedia_upd(if_t ifp) 448 { 449 struct ukswitch_softc *sc = if_getsoftc(ifp); 450 struct mii_data *mii = ukswitch_miiforport(sc, if_getdunit(ifp)); 451 452 DPRINTF(sc->sc_dev, "%s\n", __func__); 453 if (mii == NULL) 454 return (ENXIO); 455 mii_mediachg(mii); 456 return (0); 457 } 458 459 static void 460 ukswitch_ifmedia_sts(if_t ifp, struct ifmediareq *ifmr) 461 { 462 struct ukswitch_softc *sc = if_getsoftc(ifp); 463 struct mii_data *mii = ukswitch_miiforport(sc, if_getdunit(ifp)); 464 465 DPRINTF(sc->sc_dev, "%s\n", __func__); 466 467 if (mii == NULL) 468 return; 469 mii_pollstat(mii); 470 ifmr->ifm_active = mii->mii_media_active; 471 ifmr->ifm_status = mii->mii_media_status; 472 } 473 474 static int 475 ukswitch_readphy(device_t dev, int phy, int reg) 476 { 477 struct ukswitch_softc *sc; 478 int data; 479 480 sc = device_get_softc(dev); 481 UKSWITCH_LOCK_ASSERT(sc, MA_NOTOWNED); 482 483 if (phy < 0 || phy >= 32) 484 return (ENXIO); 485 if (reg < 0 || reg >= 32) 486 return (ENXIO); 487 488 UKSWITCH_LOCK(sc); 489 data = MDIO_READREG(device_get_parent(dev), phy, reg); 490 UKSWITCH_UNLOCK(sc); 491 492 return (data); 493 } 494 495 static int 496 ukswitch_writephy(device_t dev, int phy, int reg, int data) 497 { 498 struct ukswitch_softc *sc; 499 int err; 500 501 sc = device_get_softc(dev); 502 UKSWITCH_LOCK_ASSERT(sc, MA_NOTOWNED); 503 504 if (phy < 0 || phy >= 32) 505 return (ENXIO); 506 if (reg < 0 || reg >= 32) 507 return (ENXIO); 508 509 UKSWITCH_LOCK(sc); 510 err = MDIO_WRITEREG(device_get_parent(dev), phy, reg, data); 511 UKSWITCH_UNLOCK(sc); 512 513 return (err); 514 } 515 516 static int 517 ukswitch_readreg(device_t dev, int addr) 518 { 519 struct ukswitch_softc *sc; 520 521 sc = device_get_softc(dev); 522 UKSWITCH_LOCK_ASSERT(sc, MA_OWNED); 523 524 /* Not supported. */ 525 return (0); 526 } 527 528 static int 529 ukswitch_writereg(device_t dev, int addr, int value) 530 { 531 struct ukswitch_softc *sc; 532 533 sc = device_get_softc(dev); 534 UKSWITCH_LOCK_ASSERT(sc, MA_OWNED); 535 536 /* Not supported. */ 537 return (0); 538 } 539 540 static device_method_t ukswitch_methods[] = { 541 /* Device interface */ 542 DEVMETHOD(device_probe, ukswitch_probe), 543 DEVMETHOD(device_attach, ukswitch_attach), 544 DEVMETHOD(device_detach, ukswitch_detach), 545 546 /* bus interface */ 547 DEVMETHOD(bus_add_child, device_add_child_ordered), 548 549 /* MII interface */ 550 DEVMETHOD(miibus_readreg, ukswitch_readphy), 551 DEVMETHOD(miibus_writereg, ukswitch_writephy), 552 DEVMETHOD(miibus_statchg, ukswitch_statchg), 553 554 /* MDIO interface */ 555 DEVMETHOD(mdio_readreg, ukswitch_readphy), 556 DEVMETHOD(mdio_writereg, ukswitch_writephy), 557 558 /* etherswitch interface */ 559 DEVMETHOD(etherswitch_lock, ukswitch_lock), 560 DEVMETHOD(etherswitch_unlock, ukswitch_unlock), 561 DEVMETHOD(etherswitch_getinfo, ukswitch_getinfo), 562 DEVMETHOD(etherswitch_readreg, ukswitch_readreg), 563 DEVMETHOD(etherswitch_writereg, ukswitch_writereg), 564 DEVMETHOD(etherswitch_readphyreg, ukswitch_readphy), 565 DEVMETHOD(etherswitch_writephyreg, ukswitch_writephy), 566 DEVMETHOD(etherswitch_getport, ukswitch_getport), 567 DEVMETHOD(etherswitch_setport, ukswitch_setport), 568 DEVMETHOD(etherswitch_getvgroup, ukswitch_getvgroup), 569 DEVMETHOD(etherswitch_setvgroup, ukswitch_setvgroup), 570 571 DEVMETHOD_END 572 }; 573 574 DEFINE_CLASS_0(ukswitch, ukswitch_driver, ukswitch_methods, 575 sizeof(struct ukswitch_softc)); 576 577 DRIVER_MODULE(ukswitch, mdio, ukswitch_driver, 0, 0); 578 DRIVER_MODULE(miibus, ukswitch, miibus_driver, 0, 0); 579 DRIVER_MODULE(mdio, ukswitch, mdio_driver, 0, 0); 580 DRIVER_MODULE(etherswitch, ukswitch, etherswitch_driver, 0, 0); 581 MODULE_VERSION(ukswitch, 1); 582 MODULE_DEPEND(ukswitch, miibus, 1, 1, 1); /* XXX which versions? */ 583 MODULE_DEPEND(ukswitch, etherswitch, 1, 1, 1); /* XXX which versions? */
Cache object: bd002b4d08aa316c5914dd942e5b5c52
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