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sys/dev/gem/if_gem.c
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1 /*- 2 * Copyright (C) 2001 Eduardo Horvath. 3 * Copyright (c) 2001-2003 Thomas Moestl 4 * Copyright (c) 2007 Marius Strobl <marius@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * from: NetBSD: gem.c,v 1.21 2002/06/01 23:50:58 lukem Exp 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD: releng/11.2/sys/dev/gem/if_gem.c 331722 2018-03-29 02:50:57Z eadler $"); 33 34 /* 35 * Driver for Apple GMAC, Sun ERI and Sun GEM Ethernet controllers 36 */ 37 38 #if 0 39 #define GEM_DEBUG 40 #endif 41 42 #if 0 /* XXX: In case of emergency, re-enable this. */ 43 #define GEM_RINT_TIMEOUT 44 #endif 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/bus.h> 49 #include <sys/callout.h> 50 #include <sys/endian.h> 51 #include <sys/mbuf.h> 52 #include <sys/malloc.h> 53 #include <sys/kernel.h> 54 #include <sys/lock.h> 55 #include <sys/module.h> 56 #include <sys/mutex.h> 57 #include <sys/socket.h> 58 #include <sys/sockio.h> 59 #include <sys/rman.h> 60 61 #include <net/bpf.h> 62 #include <net/ethernet.h> 63 #include <net/if.h> 64 #include <net/if_var.h> 65 #include <net/if_arp.h> 66 #include <net/if_dl.h> 67 #include <net/if_media.h> 68 #include <net/if_types.h> 69 #include <net/if_vlan_var.h> 70 71 #include <netinet/in.h> 72 #include <netinet/in_systm.h> 73 #include <netinet/ip.h> 74 #include <netinet/tcp.h> 75 #include <netinet/udp.h> 76 77 #include <machine/bus.h> 78 79 #include <dev/mii/mii.h> 80 #include <dev/mii/miivar.h> 81 82 #include <dev/gem/if_gemreg.h> 83 #include <dev/gem/if_gemvar.h> 84 85 CTASSERT(powerof2(GEM_NRXDESC) && GEM_NRXDESC >= 32 && GEM_NRXDESC <= 8192); 86 CTASSERT(powerof2(GEM_NTXDESC) && GEM_NTXDESC >= 32 && GEM_NTXDESC <= 8192); 87 88 #define GEM_TRIES 10000 89 90 /* 91 * The hardware supports basic TCP/UDP checksum offloading. However, 92 * the hardware doesn't compensate the checksum for UDP datagram which 93 * can yield to 0x0. As a safe guard, UDP checksum offload is disabled 94 * by default. It can be reactivated by setting special link option 95 * link0 with ifconfig(8). 96 */ 97 #define GEM_CSUM_FEATURES (CSUM_TCP) 98 99 static int gem_add_rxbuf(struct gem_softc *sc, int idx); 100 static int gem_bitwait(struct gem_softc *sc, u_int bank, bus_addr_t r, 101 uint32_t clr, uint32_t set); 102 static void gem_cddma_callback(void *xsc, bus_dma_segment_t *segs, 103 int nsegs, int error); 104 static int gem_disable_rx(struct gem_softc *sc); 105 static int gem_disable_tx(struct gem_softc *sc); 106 static void gem_eint(struct gem_softc *sc, u_int status); 107 static void gem_init(void *xsc); 108 static void gem_init_locked(struct gem_softc *sc); 109 static void gem_init_regs(struct gem_softc *sc); 110 static int gem_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data); 111 static int gem_load_txmbuf(struct gem_softc *sc, struct mbuf **m_head); 112 static int gem_meminit(struct gem_softc *sc); 113 static void gem_mifinit(struct gem_softc *sc); 114 static void gem_reset(struct gem_softc *sc); 115 static int gem_reset_rx(struct gem_softc *sc); 116 static void gem_reset_rxdma(struct gem_softc *sc); 117 static int gem_reset_tx(struct gem_softc *sc); 118 static u_int gem_ringsize(u_int sz); 119 static void gem_rint(struct gem_softc *sc); 120 #ifdef GEM_RINT_TIMEOUT 121 static void gem_rint_timeout(void *arg); 122 #endif 123 static inline void gem_rxcksum(struct mbuf *m, uint64_t flags); 124 static void gem_rxdrain(struct gem_softc *sc); 125 static void gem_setladrf(struct gem_softc *sc); 126 static void gem_start(struct ifnet *ifp); 127 static void gem_start_locked(struct ifnet *ifp); 128 static void gem_stop(struct ifnet *ifp, int disable); 129 static void gem_tick(void *arg); 130 static void gem_tint(struct gem_softc *sc); 131 static inline void gem_txkick(struct gem_softc *sc); 132 static int gem_watchdog(struct gem_softc *sc); 133 134 devclass_t gem_devclass; 135 DRIVER_MODULE(miibus, gem, miibus_driver, miibus_devclass, 0, 0); 136 MODULE_DEPEND(gem, miibus, 1, 1, 1); 137 138 #ifdef GEM_DEBUG 139 #include <sys/ktr.h> 140 #define KTR_GEM KTR_SPARE2 141 #endif 142 143 #define GEM_BANK1_BITWAIT(sc, r, clr, set) \ 144 gem_bitwait((sc), GEM_RES_BANK1, (r), (clr), (set)) 145 #define GEM_BANK2_BITWAIT(sc, r, clr, set) \ 146 gem_bitwait((sc), GEM_RES_BANK2, (r), (clr), (set)) 147 148 int 149 gem_attach(struct gem_softc *sc) 150 { 151 struct gem_txsoft *txs; 152 struct ifnet *ifp; 153 int error, i, phy; 154 uint32_t v; 155 156 if (bootverbose) 157 device_printf(sc->sc_dev, "flags=0x%x\n", sc->sc_flags); 158 159 /* Set up ifnet structure. */ 160 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 161 if (ifp == NULL) 162 return (ENOSPC); 163 sc->sc_csum_features = GEM_CSUM_FEATURES; 164 ifp->if_softc = sc; 165 if_initname(ifp, device_get_name(sc->sc_dev), 166 device_get_unit(sc->sc_dev)); 167 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 168 ifp->if_start = gem_start; 169 ifp->if_ioctl = gem_ioctl; 170 ifp->if_init = gem_init; 171 IFQ_SET_MAXLEN(&ifp->if_snd, GEM_TXQUEUELEN); 172 ifp->if_snd.ifq_drv_maxlen = GEM_TXQUEUELEN; 173 IFQ_SET_READY(&ifp->if_snd); 174 175 callout_init_mtx(&sc->sc_tick_ch, &sc->sc_mtx, 0); 176 #ifdef GEM_RINT_TIMEOUT 177 callout_init_mtx(&sc->sc_rx_ch, &sc->sc_mtx, 0); 178 #endif 179 180 /* Make sure the chip is stopped. */ 181 gem_reset(sc); 182 183 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0, 184 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, 185 BUS_SPACE_MAXSIZE_32BIT, 0, BUS_SPACE_MAXSIZE_32BIT, 0, NULL, 186 NULL, &sc->sc_pdmatag); 187 if (error != 0) 188 goto fail_ifnet; 189 190 error = bus_dma_tag_create(sc->sc_pdmatag, 1, 0, 191 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 192 1, MCLBYTES, BUS_DMA_ALLOCNOW, NULL, NULL, &sc->sc_rdmatag); 193 if (error != 0) 194 goto fail_ptag; 195 196 error = bus_dma_tag_create(sc->sc_pdmatag, 1, 0, 197 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 198 MCLBYTES * GEM_NTXSEGS, GEM_NTXSEGS, MCLBYTES, 199 BUS_DMA_ALLOCNOW, NULL, NULL, &sc->sc_tdmatag); 200 if (error != 0) 201 goto fail_rtag; 202 203 error = bus_dma_tag_create(sc->sc_pdmatag, PAGE_SIZE, 0, 204 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 205 sizeof(struct gem_control_data), 1, 206 sizeof(struct gem_control_data), 0, 207 NULL, NULL, &sc->sc_cdmatag); 208 if (error != 0) 209 goto fail_ttag; 210 211 /* 212 * Allocate the control data structures, create and load the 213 * DMA map for it. 214 */ 215 if ((error = bus_dmamem_alloc(sc->sc_cdmatag, 216 (void **)&sc->sc_control_data, 217 BUS_DMA_WAITOK | BUS_DMA_COHERENT | BUS_DMA_ZERO, 218 &sc->sc_cddmamap)) != 0) { 219 device_printf(sc->sc_dev, 220 "unable to allocate control data, error = %d\n", error); 221 goto fail_ctag; 222 } 223 224 sc->sc_cddma = 0; 225 if ((error = bus_dmamap_load(sc->sc_cdmatag, sc->sc_cddmamap, 226 sc->sc_control_data, sizeof(struct gem_control_data), 227 gem_cddma_callback, sc, 0)) != 0 || sc->sc_cddma == 0) { 228 device_printf(sc->sc_dev, 229 "unable to load control data DMA map, error = %d\n", 230 error); 231 goto fail_cmem; 232 } 233 234 /* 235 * Initialize the transmit job descriptors. 236 */ 237 STAILQ_INIT(&sc->sc_txfreeq); 238 STAILQ_INIT(&sc->sc_txdirtyq); 239 240 /* 241 * Create the transmit buffer DMA maps. 242 */ 243 error = ENOMEM; 244 for (i = 0; i < GEM_TXQUEUELEN; i++) { 245 txs = &sc->sc_txsoft[i]; 246 txs->txs_mbuf = NULL; 247 txs->txs_ndescs = 0; 248 if ((error = bus_dmamap_create(sc->sc_tdmatag, 0, 249 &txs->txs_dmamap)) != 0) { 250 device_printf(sc->sc_dev, 251 "unable to create TX DMA map %d, error = %d\n", 252 i, error); 253 goto fail_txd; 254 } 255 STAILQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 256 } 257 258 /* 259 * Create the receive buffer DMA maps. 260 */ 261 for (i = 0; i < GEM_NRXDESC; i++) { 262 if ((error = bus_dmamap_create(sc->sc_rdmatag, 0, 263 &sc->sc_rxsoft[i].rxs_dmamap)) != 0) { 264 device_printf(sc->sc_dev, 265 "unable to create RX DMA map %d, error = %d\n", 266 i, error); 267 goto fail_rxd; 268 } 269 sc->sc_rxsoft[i].rxs_mbuf = NULL; 270 } 271 272 /* Bypass probing PHYs if we already know for sure to use a SERDES. */ 273 if ((sc->sc_flags & GEM_SERDES) != 0) 274 goto serdes; 275 276 /* Bad things will happen when touching this register on ERI. */ 277 if (sc->sc_variant != GEM_SUN_ERI) { 278 GEM_BANK1_WRITE_4(sc, GEM_MII_DATAPATH_MODE, 279 GEM_MII_DATAPATH_MII); 280 GEM_BANK1_BARRIER(sc, GEM_MII_DATAPATH_MODE, 4, 281 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 282 } 283 284 gem_mifinit(sc); 285 286 /* 287 * Look for an external PHY. 288 */ 289 error = ENXIO; 290 v = GEM_BANK1_READ_4(sc, GEM_MIF_CONFIG); 291 if ((v & GEM_MIF_CONFIG_MDI1) != 0) { 292 v |= GEM_MIF_CONFIG_PHY_SEL; 293 GEM_BANK1_WRITE_4(sc, GEM_MIF_CONFIG, v); 294 GEM_BANK1_BARRIER(sc, GEM_MIF_CONFIG, 4, 295 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 296 switch (sc->sc_variant) { 297 case GEM_SUN_ERI: 298 phy = GEM_PHYAD_EXTERNAL; 299 break; 300 default: 301 phy = MII_PHY_ANY; 302 break; 303 } 304 error = mii_attach(sc->sc_dev, &sc->sc_miibus, ifp, 305 gem_mediachange, gem_mediastatus, BMSR_DEFCAPMASK, phy, 306 MII_OFFSET_ANY, MIIF_DOPAUSE); 307 } 308 309 /* 310 * Fall back on an internal PHY if no external PHY was found. 311 * Note that with Apple (K2) GMACs GEM_MIF_CONFIG_MDI0 can't be 312 * trusted when the firmware has powered down the chip. 313 */ 314 if (error != 0 && 315 ((v & GEM_MIF_CONFIG_MDI0) != 0 || GEM_IS_APPLE(sc))) { 316 v &= ~GEM_MIF_CONFIG_PHY_SEL; 317 GEM_BANK1_WRITE_4(sc, GEM_MIF_CONFIG, v); 318 GEM_BANK1_BARRIER(sc, GEM_MIF_CONFIG, 4, 319 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 320 switch (sc->sc_variant) { 321 case GEM_SUN_ERI: 322 case GEM_APPLE_K2_GMAC: 323 phy = GEM_PHYAD_INTERNAL; 324 break; 325 case GEM_APPLE_GMAC: 326 phy = GEM_PHYAD_EXTERNAL; 327 break; 328 default: 329 phy = MII_PHY_ANY; 330 break; 331 } 332 error = mii_attach(sc->sc_dev, &sc->sc_miibus, ifp, 333 gem_mediachange, gem_mediastatus, BMSR_DEFCAPMASK, phy, 334 MII_OFFSET_ANY, MIIF_DOPAUSE); 335 } 336 337 /* 338 * Try the external PCS SERDES if we didn't find any PHYs. 339 */ 340 if (error != 0 && sc->sc_variant == GEM_SUN_GEM) { 341 serdes: 342 GEM_BANK1_WRITE_4(sc, GEM_MII_DATAPATH_MODE, 343 GEM_MII_DATAPATH_SERDES); 344 GEM_BANK1_BARRIER(sc, GEM_MII_DATAPATH_MODE, 4, 345 BUS_SPACE_BARRIER_WRITE); 346 GEM_BANK1_WRITE_4(sc, GEM_MII_SLINK_CONTROL, 347 GEM_MII_SLINK_LOOPBACK | GEM_MII_SLINK_EN_SYNC_D); 348 GEM_BANK1_BARRIER(sc, GEM_MII_SLINK_CONTROL, 4, 349 BUS_SPACE_BARRIER_WRITE); 350 GEM_BANK1_WRITE_4(sc, GEM_MII_CONFIG, GEM_MII_CONFIG_ENABLE); 351 GEM_BANK1_BARRIER(sc, GEM_MII_CONFIG, 4, 352 BUS_SPACE_BARRIER_WRITE); 353 sc->sc_flags |= GEM_SERDES; 354 error = mii_attach(sc->sc_dev, &sc->sc_miibus, ifp, 355 gem_mediachange, gem_mediastatus, BMSR_DEFCAPMASK, 356 GEM_PHYAD_EXTERNAL, MII_OFFSET_ANY, MIIF_DOPAUSE); 357 } 358 if (error != 0) { 359 device_printf(sc->sc_dev, "attaching PHYs failed\n"); 360 goto fail_rxd; 361 } 362 sc->sc_mii = device_get_softc(sc->sc_miibus); 363 364 /* 365 * From this point forward, the attachment cannot fail. A failure 366 * before this point releases all resources that may have been 367 * allocated. 368 */ 369 370 /* Get RX FIFO size. */ 371 sc->sc_rxfifosize = 64 * 372 GEM_BANK1_READ_4(sc, GEM_RX_FIFO_SIZE); 373 374 /* Get TX FIFO size. */ 375 v = GEM_BANK1_READ_4(sc, GEM_TX_FIFO_SIZE); 376 device_printf(sc->sc_dev, "%ukB RX FIFO, %ukB TX FIFO\n", 377 sc->sc_rxfifosize / 1024, v / 16); 378 379 /* Attach the interface. */ 380 ether_ifattach(ifp, sc->sc_enaddr); 381 382 /* 383 * Tell the upper layer(s) we support long frames/checksum offloads. 384 */ 385 ifp->if_hdrlen = sizeof(struct ether_vlan_header); 386 ifp->if_capabilities |= IFCAP_VLAN_MTU | IFCAP_HWCSUM; 387 ifp->if_hwassist |= sc->sc_csum_features; 388 ifp->if_capenable |= IFCAP_VLAN_MTU | IFCAP_HWCSUM; 389 390 return (0); 391 392 /* 393 * Free any resources we've allocated during the failed attach 394 * attempt. Do this in reverse order and fall through. 395 */ 396 fail_rxd: 397 for (i = 0; i < GEM_NRXDESC; i++) 398 if (sc->sc_rxsoft[i].rxs_dmamap != NULL) 399 bus_dmamap_destroy(sc->sc_rdmatag, 400 sc->sc_rxsoft[i].rxs_dmamap); 401 fail_txd: 402 for (i = 0; i < GEM_TXQUEUELEN; i++) 403 if (sc->sc_txsoft[i].txs_dmamap != NULL) 404 bus_dmamap_destroy(sc->sc_tdmatag, 405 sc->sc_txsoft[i].txs_dmamap); 406 bus_dmamap_unload(sc->sc_cdmatag, sc->sc_cddmamap); 407 fail_cmem: 408 bus_dmamem_free(sc->sc_cdmatag, sc->sc_control_data, 409 sc->sc_cddmamap); 410 fail_ctag: 411 bus_dma_tag_destroy(sc->sc_cdmatag); 412 fail_ttag: 413 bus_dma_tag_destroy(sc->sc_tdmatag); 414 fail_rtag: 415 bus_dma_tag_destroy(sc->sc_rdmatag); 416 fail_ptag: 417 bus_dma_tag_destroy(sc->sc_pdmatag); 418 fail_ifnet: 419 if_free(ifp); 420 return (error); 421 } 422 423 void 424 gem_detach(struct gem_softc *sc) 425 { 426 struct ifnet *ifp = sc->sc_ifp; 427 int i; 428 429 ether_ifdetach(ifp); 430 GEM_LOCK(sc); 431 gem_stop(ifp, 1); 432 GEM_UNLOCK(sc); 433 callout_drain(&sc->sc_tick_ch); 434 #ifdef GEM_RINT_TIMEOUT 435 callout_drain(&sc->sc_rx_ch); 436 #endif 437 if_free(ifp); 438 device_delete_child(sc->sc_dev, sc->sc_miibus); 439 440 for (i = 0; i < GEM_NRXDESC; i++) 441 if (sc->sc_rxsoft[i].rxs_dmamap != NULL) 442 bus_dmamap_destroy(sc->sc_rdmatag, 443 sc->sc_rxsoft[i].rxs_dmamap); 444 for (i = 0; i < GEM_TXQUEUELEN; i++) 445 if (sc->sc_txsoft[i].txs_dmamap != NULL) 446 bus_dmamap_destroy(sc->sc_tdmatag, 447 sc->sc_txsoft[i].txs_dmamap); 448 GEM_CDSYNC(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 449 bus_dmamap_unload(sc->sc_cdmatag, sc->sc_cddmamap); 450 bus_dmamem_free(sc->sc_cdmatag, sc->sc_control_data, 451 sc->sc_cddmamap); 452 bus_dma_tag_destroy(sc->sc_cdmatag); 453 bus_dma_tag_destroy(sc->sc_tdmatag); 454 bus_dma_tag_destroy(sc->sc_rdmatag); 455 bus_dma_tag_destroy(sc->sc_pdmatag); 456 } 457 458 void 459 gem_suspend(struct gem_softc *sc) 460 { 461 struct ifnet *ifp = sc->sc_ifp; 462 463 GEM_LOCK(sc); 464 gem_stop(ifp, 0); 465 GEM_UNLOCK(sc); 466 } 467 468 void 469 gem_resume(struct gem_softc *sc) 470 { 471 struct ifnet *ifp = sc->sc_ifp; 472 473 GEM_LOCK(sc); 474 /* 475 * On resume all registers have to be initialized again like 476 * after power-on. 477 */ 478 sc->sc_flags &= ~GEM_INITED; 479 if (ifp->if_flags & IFF_UP) 480 gem_init_locked(sc); 481 GEM_UNLOCK(sc); 482 } 483 484 static inline void 485 gem_rxcksum(struct mbuf *m, uint64_t flags) 486 { 487 struct ether_header *eh; 488 struct ip *ip; 489 struct udphdr *uh; 490 uint16_t *opts; 491 int32_t hlen, len, pktlen; 492 uint32_t temp32; 493 uint16_t cksum; 494 495 pktlen = m->m_pkthdr.len; 496 if (pktlen < sizeof(struct ether_header) + sizeof(struct ip)) 497 return; 498 eh = mtod(m, struct ether_header *); 499 if (eh->ether_type != htons(ETHERTYPE_IP)) 500 return; 501 ip = (struct ip *)(eh + 1); 502 if (ip->ip_v != IPVERSION) 503 return; 504 505 hlen = ip->ip_hl << 2; 506 pktlen -= sizeof(struct ether_header); 507 if (hlen < sizeof(struct ip)) 508 return; 509 if (ntohs(ip->ip_len) < hlen) 510 return; 511 if (ntohs(ip->ip_len) != pktlen) 512 return; 513 if (ip->ip_off & htons(IP_MF | IP_OFFMASK)) 514 return; /* Cannot handle fragmented packet. */ 515 516 switch (ip->ip_p) { 517 case IPPROTO_TCP: 518 if (pktlen < (hlen + sizeof(struct tcphdr))) 519 return; 520 break; 521 case IPPROTO_UDP: 522 if (pktlen < (hlen + sizeof(struct udphdr))) 523 return; 524 uh = (struct udphdr *)((uint8_t *)ip + hlen); 525 if (uh->uh_sum == 0) 526 return; /* no checksum */ 527 break; 528 default: 529 return; 530 } 531 532 cksum = ~(flags & GEM_RD_CHECKSUM); 533 /* checksum fixup for IP options */ 534 len = hlen - sizeof(struct ip); 535 if (len > 0) { 536 opts = (uint16_t *)(ip + 1); 537 for (; len > 0; len -= sizeof(uint16_t), opts++) { 538 temp32 = cksum - *opts; 539 temp32 = (temp32 >> 16) + (temp32 & 65535); 540 cksum = temp32 & 65535; 541 } 542 } 543 m->m_pkthdr.csum_flags |= CSUM_DATA_VALID; 544 m->m_pkthdr.csum_data = cksum; 545 } 546 547 static void 548 gem_cddma_callback(void *xsc, bus_dma_segment_t *segs, int nsegs, int error) 549 { 550 struct gem_softc *sc = xsc; 551 552 if (error != 0) 553 return; 554 if (nsegs != 1) 555 panic("%s: bad control buffer segment count", __func__); 556 sc->sc_cddma = segs[0].ds_addr; 557 } 558 559 static void 560 gem_tick(void *arg) 561 { 562 struct gem_softc *sc = arg; 563 struct ifnet *ifp = sc->sc_ifp; 564 uint32_t v; 565 566 GEM_LOCK_ASSERT(sc, MA_OWNED); 567 568 /* 569 * Unload collision and error counters. 570 */ 571 if_inc_counter(ifp, IFCOUNTER_COLLISIONS, 572 GEM_BANK1_READ_4(sc, GEM_MAC_NORM_COLL_CNT) + 573 GEM_BANK1_READ_4(sc, GEM_MAC_FIRST_COLL_CNT)); 574 v = GEM_BANK1_READ_4(sc, GEM_MAC_EXCESS_COLL_CNT) + 575 GEM_BANK1_READ_4(sc, GEM_MAC_LATE_COLL_CNT); 576 if_inc_counter(ifp, IFCOUNTER_COLLISIONS, v); 577 if_inc_counter(ifp, IFCOUNTER_OERRORS, v); 578 if_inc_counter(ifp, IFCOUNTER_IERRORS, 579 GEM_BANK1_READ_4(sc, GEM_MAC_RX_LEN_ERR_CNT) + 580 GEM_BANK1_READ_4(sc, GEM_MAC_RX_ALIGN_ERR) + 581 GEM_BANK1_READ_4(sc, GEM_MAC_RX_CRC_ERR_CNT) + 582 GEM_BANK1_READ_4(sc, GEM_MAC_RX_CODE_VIOL)); 583 584 /* 585 * Then clear the hardware counters. 586 */ 587 GEM_BANK1_WRITE_4(sc, GEM_MAC_NORM_COLL_CNT, 0); 588 GEM_BANK1_WRITE_4(sc, GEM_MAC_FIRST_COLL_CNT, 0); 589 GEM_BANK1_WRITE_4(sc, GEM_MAC_EXCESS_COLL_CNT, 0); 590 GEM_BANK1_WRITE_4(sc, GEM_MAC_LATE_COLL_CNT, 0); 591 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_LEN_ERR_CNT, 0); 592 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_ALIGN_ERR, 0); 593 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CRC_ERR_CNT, 0); 594 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CODE_VIOL, 0); 595 596 mii_tick(sc->sc_mii); 597 598 if (gem_watchdog(sc) == EJUSTRETURN) 599 return; 600 601 callout_reset(&sc->sc_tick_ch, hz, gem_tick, sc); 602 } 603 604 static int 605 gem_bitwait(struct gem_softc *sc, u_int bank, bus_addr_t r, uint32_t clr, 606 uint32_t set) 607 { 608 int i; 609 uint32_t reg; 610 611 for (i = GEM_TRIES; i--; DELAY(100)) { 612 reg = GEM_BANKN_READ_M(bank, 4, sc, r); 613 if ((reg & clr) == 0 && (reg & set) == set) 614 return (1); 615 } 616 return (0); 617 } 618 619 static void 620 gem_reset(struct gem_softc *sc) 621 { 622 623 #ifdef GEM_DEBUG 624 CTR2(KTR_GEM, "%s: %s", device_get_name(sc->sc_dev), __func__); 625 #endif 626 gem_reset_rx(sc); 627 gem_reset_tx(sc); 628 629 /* Do a full reset. */ 630 GEM_BANK2_WRITE_4(sc, GEM_RESET, GEM_RESET_RX | GEM_RESET_TX | 631 (sc->sc_variant == GEM_SUN_ERI ? GEM_ERI_CACHE_LINE_SIZE << 632 GEM_RESET_CLSZ_SHFT : 0)); 633 GEM_BANK2_BARRIER(sc, GEM_RESET, 4, 634 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 635 if (!GEM_BANK2_BITWAIT(sc, GEM_RESET, GEM_RESET_RX | GEM_RESET_TX, 0)) 636 device_printf(sc->sc_dev, "cannot reset device\n"); 637 } 638 639 static void 640 gem_rxdrain(struct gem_softc *sc) 641 { 642 struct gem_rxsoft *rxs; 643 int i; 644 645 for (i = 0; i < GEM_NRXDESC; i++) { 646 rxs = &sc->sc_rxsoft[i]; 647 if (rxs->rxs_mbuf != NULL) { 648 bus_dmamap_sync(sc->sc_rdmatag, rxs->rxs_dmamap, 649 BUS_DMASYNC_POSTREAD); 650 bus_dmamap_unload(sc->sc_rdmatag, rxs->rxs_dmamap); 651 m_freem(rxs->rxs_mbuf); 652 rxs->rxs_mbuf = NULL; 653 } 654 } 655 } 656 657 static void 658 gem_stop(struct ifnet *ifp, int disable) 659 { 660 struct gem_softc *sc = ifp->if_softc; 661 struct gem_txsoft *txs; 662 663 #ifdef GEM_DEBUG 664 CTR2(KTR_GEM, "%s: %s", device_get_name(sc->sc_dev), __func__); 665 #endif 666 667 callout_stop(&sc->sc_tick_ch); 668 #ifdef GEM_RINT_TIMEOUT 669 callout_stop(&sc->sc_rx_ch); 670 #endif 671 672 gem_reset_tx(sc); 673 gem_reset_rx(sc); 674 675 /* 676 * Release any queued transmit buffers. 677 */ 678 while ((txs = STAILQ_FIRST(&sc->sc_txdirtyq)) != NULL) { 679 STAILQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q); 680 if (txs->txs_ndescs != 0) { 681 bus_dmamap_sync(sc->sc_tdmatag, txs->txs_dmamap, 682 BUS_DMASYNC_POSTWRITE); 683 bus_dmamap_unload(sc->sc_tdmatag, txs->txs_dmamap); 684 if (txs->txs_mbuf != NULL) { 685 m_freem(txs->txs_mbuf); 686 txs->txs_mbuf = NULL; 687 } 688 } 689 STAILQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 690 } 691 692 if (disable) 693 gem_rxdrain(sc); 694 695 /* 696 * Mark the interface down and cancel the watchdog timer. 697 */ 698 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 699 sc->sc_flags &= ~GEM_LINK; 700 sc->sc_wdog_timer = 0; 701 } 702 703 static int 704 gem_reset_rx(struct gem_softc *sc) 705 { 706 707 /* 708 * Resetting while DMA is in progress can cause a bus hang, so we 709 * disable DMA first. 710 */ 711 (void)gem_disable_rx(sc); 712 GEM_BANK1_WRITE_4(sc, GEM_RX_CONFIG, 0); 713 GEM_BANK1_BARRIER(sc, GEM_RX_CONFIG, 4, 714 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 715 if (!GEM_BANK1_BITWAIT(sc, GEM_RX_CONFIG, GEM_RX_CONFIG_RXDMA_EN, 0)) 716 device_printf(sc->sc_dev, "cannot disable RX DMA\n"); 717 718 /* Wait 5ms extra. */ 719 DELAY(5000); 720 721 /* Reset the ERX. */ 722 GEM_BANK2_WRITE_4(sc, GEM_RESET, GEM_RESET_RX | 723 (sc->sc_variant == GEM_SUN_ERI ? GEM_ERI_CACHE_LINE_SIZE << 724 GEM_RESET_CLSZ_SHFT : 0)); 725 GEM_BANK2_BARRIER(sc, GEM_RESET, 4, 726 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 727 if (!GEM_BANK2_BITWAIT(sc, GEM_RESET, GEM_RESET_RX, 0)) { 728 device_printf(sc->sc_dev, "cannot reset receiver\n"); 729 return (1); 730 } 731 732 /* Finally, reset RX MAC. */ 733 GEM_BANK1_WRITE_4(sc, GEM_MAC_RXRESET, 1); 734 GEM_BANK1_BARRIER(sc, GEM_MAC_RXRESET, 4, 735 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 736 if (!GEM_BANK1_BITWAIT(sc, GEM_MAC_RXRESET, 1, 0)) { 737 device_printf(sc->sc_dev, "cannot reset RX MAC\n"); 738 return (1); 739 } 740 741 return (0); 742 } 743 744 /* 745 * Reset the receiver DMA engine. 746 * 747 * Intended to be used in case of GEM_INTR_RX_TAG_ERR, GEM_MAC_RX_OVERFLOW 748 * etc in order to reset the receiver DMA engine only and not do a full 749 * reset which amongst others also downs the link and clears the FIFOs. 750 */ 751 static void 752 gem_reset_rxdma(struct gem_softc *sc) 753 { 754 int i; 755 756 if (gem_reset_rx(sc) != 0) { 757 sc->sc_ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 758 return (gem_init_locked(sc)); 759 } 760 for (i = 0; i < GEM_NRXDESC; i++) 761 if (sc->sc_rxsoft[i].rxs_mbuf != NULL) 762 GEM_UPDATE_RXDESC(sc, i); 763 sc->sc_rxptr = 0; 764 GEM_CDSYNC(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 765 766 /* NOTE: we use only 32-bit DMA addresses here. */ 767 GEM_BANK1_WRITE_4(sc, GEM_RX_RING_PTR_HI, 0); 768 GEM_BANK1_WRITE_4(sc, GEM_RX_RING_PTR_LO, GEM_CDRXADDR(sc, 0)); 769 GEM_BANK1_WRITE_4(sc, GEM_RX_KICK, GEM_NRXDESC - 4); 770 GEM_BANK1_WRITE_4(sc, GEM_RX_CONFIG, 771 gem_ringsize(GEM_NRXDESC /* XXX */) | 772 ((ETHER_HDR_LEN + sizeof(struct ip)) << 773 GEM_RX_CONFIG_CXM_START_SHFT) | 774 (GEM_THRSH_1024 << GEM_RX_CONFIG_FIFO_THRS_SHIFT) | 775 (ETHER_ALIGN << GEM_RX_CONFIG_FBOFF_SHFT)); 776 /* Adjusting for the SBus clock probably isn't worth the fuzz. */ 777 GEM_BANK1_WRITE_4(sc, GEM_RX_BLANKING, 778 ((6 * (sc->sc_flags & GEM_PCI66) != 0 ? 2 : 1) << 779 GEM_RX_BLANKING_TIME_SHIFT) | 6); 780 GEM_BANK1_WRITE_4(sc, GEM_RX_PAUSE_THRESH, 781 (3 * sc->sc_rxfifosize / 256) | 782 ((sc->sc_rxfifosize / 256) << 12)); 783 GEM_BANK1_WRITE_4(sc, GEM_RX_CONFIG, 784 GEM_BANK1_READ_4(sc, GEM_RX_CONFIG) | GEM_RX_CONFIG_RXDMA_EN); 785 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_MASK, 786 GEM_MAC_RX_DONE | GEM_MAC_RX_FRAME_CNT); 787 /* 788 * Clear the RX filter and reprogram it. This will also set the 789 * current RX MAC configuration and enable it. 790 */ 791 gem_setladrf(sc); 792 } 793 794 static int 795 gem_reset_tx(struct gem_softc *sc) 796 { 797 798 /* 799 * Resetting while DMA is in progress can cause a bus hang, so we 800 * disable DMA first. 801 */ 802 (void)gem_disable_tx(sc); 803 GEM_BANK1_WRITE_4(sc, GEM_TX_CONFIG, 0); 804 GEM_BANK1_BARRIER(sc, GEM_TX_CONFIG, 4, 805 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 806 if (!GEM_BANK1_BITWAIT(sc, GEM_TX_CONFIG, GEM_TX_CONFIG_TXDMA_EN, 0)) 807 device_printf(sc->sc_dev, "cannot disable TX DMA\n"); 808 809 /* Wait 5ms extra. */ 810 DELAY(5000); 811 812 /* Finally, reset the ETX. */ 813 GEM_BANK2_WRITE_4(sc, GEM_RESET, GEM_RESET_TX | 814 (sc->sc_variant == GEM_SUN_ERI ? GEM_ERI_CACHE_LINE_SIZE << 815 GEM_RESET_CLSZ_SHFT : 0)); 816 GEM_BANK2_BARRIER(sc, GEM_RESET, 4, 817 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 818 if (!GEM_BANK2_BITWAIT(sc, GEM_RESET, GEM_RESET_TX, 0)) { 819 device_printf(sc->sc_dev, "cannot reset transmitter\n"); 820 return (1); 821 } 822 return (0); 823 } 824 825 static int 826 gem_disable_rx(struct gem_softc *sc) 827 { 828 829 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CONFIG, 830 GEM_BANK1_READ_4(sc, GEM_MAC_RX_CONFIG) & ~GEM_MAC_RX_ENABLE); 831 GEM_BANK1_BARRIER(sc, GEM_MAC_RX_CONFIG, 4, 832 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 833 if (GEM_BANK1_BITWAIT(sc, GEM_MAC_RX_CONFIG, GEM_MAC_RX_ENABLE, 0)) 834 return (1); 835 device_printf(sc->sc_dev, "cannot disable RX MAC\n"); 836 return (0); 837 } 838 839 static int 840 gem_disable_tx(struct gem_softc *sc) 841 { 842 843 GEM_BANK1_WRITE_4(sc, GEM_MAC_TX_CONFIG, 844 GEM_BANK1_READ_4(sc, GEM_MAC_TX_CONFIG) & ~GEM_MAC_TX_ENABLE); 845 GEM_BANK1_BARRIER(sc, GEM_MAC_TX_CONFIG, 4, 846 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 847 if (GEM_BANK1_BITWAIT(sc, GEM_MAC_TX_CONFIG, GEM_MAC_TX_ENABLE, 0)) 848 return (1); 849 device_printf(sc->sc_dev, "cannot disable TX MAC\n"); 850 return (0); 851 } 852 853 static int 854 gem_meminit(struct gem_softc *sc) 855 { 856 struct gem_rxsoft *rxs; 857 int error, i; 858 859 GEM_LOCK_ASSERT(sc, MA_OWNED); 860 861 /* 862 * Initialize the transmit descriptor ring. 863 */ 864 for (i = 0; i < GEM_NTXDESC; i++) { 865 sc->sc_txdescs[i].gd_flags = 0; 866 sc->sc_txdescs[i].gd_addr = 0; 867 } 868 sc->sc_txfree = GEM_MAXTXFREE; 869 sc->sc_txnext = 0; 870 sc->sc_txwin = 0; 871 872 /* 873 * Initialize the receive descriptor and receive job 874 * descriptor rings. 875 */ 876 for (i = 0; i < GEM_NRXDESC; i++) { 877 rxs = &sc->sc_rxsoft[i]; 878 if (rxs->rxs_mbuf == NULL) { 879 if ((error = gem_add_rxbuf(sc, i)) != 0) { 880 device_printf(sc->sc_dev, 881 "unable to allocate or map RX buffer %d, " 882 "error = %d\n", i, error); 883 /* 884 * XXX we should attempt to run with fewer 885 * receive buffers instead of just failing. 886 */ 887 gem_rxdrain(sc); 888 return (1); 889 } 890 } else 891 GEM_INIT_RXDESC(sc, i); 892 } 893 sc->sc_rxptr = 0; 894 895 GEM_CDSYNC(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 896 897 return (0); 898 } 899 900 static u_int 901 gem_ringsize(u_int sz) 902 { 903 904 switch (sz) { 905 case 32: 906 return (GEM_RING_SZ_32); 907 case 64: 908 return (GEM_RING_SZ_64); 909 case 128: 910 return (GEM_RING_SZ_128); 911 case 256: 912 return (GEM_RING_SZ_256); 913 case 512: 914 return (GEM_RING_SZ_512); 915 case 1024: 916 return (GEM_RING_SZ_1024); 917 case 2048: 918 return (GEM_RING_SZ_2048); 919 case 4096: 920 return (GEM_RING_SZ_4096); 921 case 8192: 922 return (GEM_RING_SZ_8192); 923 default: 924 printf("%s: invalid ring size %d\n", __func__, sz); 925 return (GEM_RING_SZ_32); 926 } 927 } 928 929 static void 930 gem_init(void *xsc) 931 { 932 struct gem_softc *sc = xsc; 933 934 GEM_LOCK(sc); 935 gem_init_locked(sc); 936 GEM_UNLOCK(sc); 937 } 938 939 /* 940 * Initialization of interface; set up initialization block 941 * and transmit/receive descriptor rings. 942 */ 943 static void 944 gem_init_locked(struct gem_softc *sc) 945 { 946 struct ifnet *ifp = sc->sc_ifp; 947 uint32_t v; 948 949 GEM_LOCK_ASSERT(sc, MA_OWNED); 950 951 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) 952 return; 953 954 #ifdef GEM_DEBUG 955 CTR2(KTR_GEM, "%s: %s: calling stop", device_get_name(sc->sc_dev), 956 __func__); 957 #endif 958 /* 959 * Initialization sequence. The numbered steps below correspond 960 * to the sequence outlined in section 6.3.5.1 in the Ethernet 961 * Channel Engine manual (part of the PCIO manual). 962 * See also the STP2002-STQ document from Sun Microsystems. 963 */ 964 965 /* step 1 & 2. Reset the Ethernet Channel. */ 966 gem_stop(ifp, 0); 967 gem_reset(sc); 968 #ifdef GEM_DEBUG 969 CTR2(KTR_GEM, "%s: %s: restarting", device_get_name(sc->sc_dev), 970 __func__); 971 #endif 972 973 if ((sc->sc_flags & GEM_SERDES) == 0) 974 /* Re-initialize the MIF. */ 975 gem_mifinit(sc); 976 977 /* step 3. Setup data structures in host memory. */ 978 if (gem_meminit(sc) != 0) 979 return; 980 981 /* step 4. TX MAC registers & counters */ 982 gem_init_regs(sc); 983 984 /* step 5. RX MAC registers & counters */ 985 986 /* step 6 & 7. Program Descriptor Ring Base Addresses. */ 987 /* NOTE: we use only 32-bit DMA addresses here. */ 988 GEM_BANK1_WRITE_4(sc, GEM_TX_RING_PTR_HI, 0); 989 GEM_BANK1_WRITE_4(sc, GEM_TX_RING_PTR_LO, GEM_CDTXADDR(sc, 0)); 990 991 GEM_BANK1_WRITE_4(sc, GEM_RX_RING_PTR_HI, 0); 992 GEM_BANK1_WRITE_4(sc, GEM_RX_RING_PTR_LO, GEM_CDRXADDR(sc, 0)); 993 #ifdef GEM_DEBUG 994 CTR3(KTR_GEM, "loading RX ring %lx, TX ring %lx, cddma %lx", 995 GEM_CDRXADDR(sc, 0), GEM_CDTXADDR(sc, 0), sc->sc_cddma); 996 #endif 997 998 /* step 8. Global Configuration & Interrupt Mask */ 999 1000 /* 1001 * Set the internal arbitration to "infinite" bursts of the 1002 * maximum length of 31 * 64 bytes so DMA transfers aren't 1003 * split up in cache line size chunks. This greatly improves 1004 * RX performance. 1005 * Enable silicon bug workarounds for the Apple variants. 1006 */ 1007 GEM_BANK1_WRITE_4(sc, GEM_CONFIG, 1008 GEM_CONFIG_TXDMA_LIMIT | GEM_CONFIG_RXDMA_LIMIT | 1009 ((sc->sc_flags & GEM_PCI) != 0 ? GEM_CONFIG_BURST_INF : 1010 GEM_CONFIG_BURST_64) | (GEM_IS_APPLE(sc) ? 1011 GEM_CONFIG_RONPAULBIT | GEM_CONFIG_BUG2FIX : 0)); 1012 1013 GEM_BANK1_WRITE_4(sc, GEM_INTMASK, 1014 ~(GEM_INTR_TX_INTME | GEM_INTR_TX_EMPTY | GEM_INTR_RX_DONE | 1015 GEM_INTR_RX_NOBUF | GEM_INTR_RX_TAG_ERR | GEM_INTR_PERR | 1016 GEM_INTR_BERR 1017 #ifdef GEM_DEBUG 1018 | GEM_INTR_PCS | GEM_INTR_MIF 1019 #endif 1020 )); 1021 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_MASK, 1022 GEM_MAC_RX_DONE | GEM_MAC_RX_FRAME_CNT); 1023 GEM_BANK1_WRITE_4(sc, GEM_MAC_TX_MASK, 1024 GEM_MAC_TX_XMIT_DONE | GEM_MAC_TX_DEFER_EXP | 1025 GEM_MAC_TX_PEAK_EXP); 1026 #ifdef GEM_DEBUG 1027 GEM_BANK1_WRITE_4(sc, GEM_MAC_CONTROL_MASK, 1028 ~(GEM_MAC_PAUSED | GEM_MAC_PAUSE | GEM_MAC_RESUME)); 1029 #else 1030 GEM_BANK1_WRITE_4(sc, GEM_MAC_CONTROL_MASK, 1031 GEM_MAC_PAUSED | GEM_MAC_PAUSE | GEM_MAC_RESUME); 1032 #endif 1033 1034 /* step 9. ETX Configuration: use mostly default values. */ 1035 1036 /* Enable DMA. */ 1037 v = gem_ringsize(GEM_NTXDESC); 1038 /* Set TX FIFO threshold and enable DMA. */ 1039 v |= ((sc->sc_variant == GEM_SUN_ERI ? 0x100 : 0x4ff) << 10) & 1040 GEM_TX_CONFIG_TXFIFO_TH; 1041 GEM_BANK1_WRITE_4(sc, GEM_TX_CONFIG, v | GEM_TX_CONFIG_TXDMA_EN); 1042 1043 /* step 10. ERX Configuration */ 1044 1045 /* Encode Receive Descriptor ring size. */ 1046 v = gem_ringsize(GEM_NRXDESC /* XXX */); 1047 /* RX TCP/UDP checksum offset */ 1048 v |= ((ETHER_HDR_LEN + sizeof(struct ip)) << 1049 GEM_RX_CONFIG_CXM_START_SHFT); 1050 /* Set RX FIFO threshold, set first byte offset and enable DMA. */ 1051 GEM_BANK1_WRITE_4(sc, GEM_RX_CONFIG, 1052 v | (GEM_THRSH_1024 << GEM_RX_CONFIG_FIFO_THRS_SHIFT) | 1053 (ETHER_ALIGN << GEM_RX_CONFIG_FBOFF_SHFT) | 1054 GEM_RX_CONFIG_RXDMA_EN); 1055 1056 /* Adjusting for the SBus clock probably isn't worth the fuzz. */ 1057 GEM_BANK1_WRITE_4(sc, GEM_RX_BLANKING, 1058 ((6 * (sc->sc_flags & GEM_PCI66) != 0 ? 2 : 1) << 1059 GEM_RX_BLANKING_TIME_SHIFT) | 6); 1060 1061 /* 1062 * The following value is for an OFF Threshold of about 3/4 full 1063 * and an ON Threshold of 1/4 full. 1064 */ 1065 GEM_BANK1_WRITE_4(sc, GEM_RX_PAUSE_THRESH, 1066 (3 * sc->sc_rxfifosize / 256) | 1067 ((sc->sc_rxfifosize / 256) << 12)); 1068 1069 /* step 11. Configure Media. */ 1070 1071 /* step 12. RX_MAC Configuration Register */ 1072 v = GEM_BANK1_READ_4(sc, GEM_MAC_RX_CONFIG); 1073 v &= ~GEM_MAC_RX_ENABLE; 1074 v |= GEM_MAC_RX_STRIP_CRC; 1075 sc->sc_mac_rxcfg = v; 1076 /* 1077 * Clear the RX filter and reprogram it. This will also set the 1078 * current RX MAC configuration and enable it. 1079 */ 1080 gem_setladrf(sc); 1081 1082 /* step 13. TX_MAC Configuration Register */ 1083 v = GEM_BANK1_READ_4(sc, GEM_MAC_TX_CONFIG); 1084 v |= GEM_MAC_TX_ENABLE; 1085 (void)gem_disable_tx(sc); 1086 GEM_BANK1_WRITE_4(sc, GEM_MAC_TX_CONFIG, v); 1087 1088 /* step 14. Issue Transmit Pending command. */ 1089 1090 /* step 15. Give the receiver a swift kick. */ 1091 GEM_BANK1_WRITE_4(sc, GEM_RX_KICK, GEM_NRXDESC - 4); 1092 1093 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1094 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1095 1096 mii_mediachg(sc->sc_mii); 1097 1098 /* Start the one second timer. */ 1099 sc->sc_wdog_timer = 0; 1100 callout_reset(&sc->sc_tick_ch, hz, gem_tick, sc); 1101 } 1102 1103 static int 1104 gem_load_txmbuf(struct gem_softc *sc, struct mbuf **m_head) 1105 { 1106 bus_dma_segment_t txsegs[GEM_NTXSEGS]; 1107 struct gem_txsoft *txs; 1108 struct ip *ip; 1109 struct mbuf *m; 1110 uint64_t cflags, flags; 1111 int error, nexttx, nsegs, offset, seg; 1112 1113 GEM_LOCK_ASSERT(sc, MA_OWNED); 1114 1115 /* Get a work queue entry. */ 1116 if ((txs = STAILQ_FIRST(&sc->sc_txfreeq)) == NULL) { 1117 /* Ran out of descriptors. */ 1118 return (ENOBUFS); 1119 } 1120 1121 cflags = 0; 1122 if (((*m_head)->m_pkthdr.csum_flags & sc->sc_csum_features) != 0) { 1123 if (M_WRITABLE(*m_head) == 0) { 1124 m = m_dup(*m_head, M_NOWAIT); 1125 m_freem(*m_head); 1126 *m_head = m; 1127 if (m == NULL) 1128 return (ENOBUFS); 1129 } 1130 offset = sizeof(struct ether_header); 1131 m = m_pullup(*m_head, offset + sizeof(struct ip)); 1132 if (m == NULL) { 1133 *m_head = NULL; 1134 return (ENOBUFS); 1135 } 1136 ip = (struct ip *)(mtod(m, caddr_t) + offset); 1137 offset += (ip->ip_hl << 2); 1138 cflags = offset << GEM_TD_CXSUM_STARTSHFT | 1139 ((offset + m->m_pkthdr.csum_data) << 1140 GEM_TD_CXSUM_STUFFSHFT) | GEM_TD_CXSUM_ENABLE; 1141 *m_head = m; 1142 } 1143 1144 error = bus_dmamap_load_mbuf_sg(sc->sc_tdmatag, txs->txs_dmamap, 1145 *m_head, txsegs, &nsegs, BUS_DMA_NOWAIT); 1146 if (error == EFBIG) { 1147 m = m_collapse(*m_head, M_NOWAIT, GEM_NTXSEGS); 1148 if (m == NULL) { 1149 m_freem(*m_head); 1150 *m_head = NULL; 1151 return (ENOBUFS); 1152 } 1153 *m_head = m; 1154 error = bus_dmamap_load_mbuf_sg(sc->sc_tdmatag, 1155 txs->txs_dmamap, *m_head, txsegs, &nsegs, 1156 BUS_DMA_NOWAIT); 1157 if (error != 0) { 1158 m_freem(*m_head); 1159 *m_head = NULL; 1160 return (error); 1161 } 1162 } else if (error != 0) 1163 return (error); 1164 /* If nsegs is wrong then the stack is corrupt. */ 1165 KASSERT(nsegs <= GEM_NTXSEGS, 1166 ("%s: too many DMA segments (%d)", __func__, nsegs)); 1167 if (nsegs == 0) { 1168 m_freem(*m_head); 1169 *m_head = NULL; 1170 return (EIO); 1171 } 1172 1173 /* 1174 * Ensure we have enough descriptors free to describe 1175 * the packet. Note, we always reserve one descriptor 1176 * at the end of the ring as a termination point, in 1177 * order to prevent wrap-around. 1178 */ 1179 if (nsegs > sc->sc_txfree - 1) { 1180 txs->txs_ndescs = 0; 1181 bus_dmamap_unload(sc->sc_tdmatag, txs->txs_dmamap); 1182 return (ENOBUFS); 1183 } 1184 1185 txs->txs_ndescs = nsegs; 1186 txs->txs_firstdesc = sc->sc_txnext; 1187 nexttx = txs->txs_firstdesc; 1188 for (seg = 0; seg < nsegs; seg++, nexttx = GEM_NEXTTX(nexttx)) { 1189 #ifdef GEM_DEBUG 1190 CTR6(KTR_GEM, 1191 "%s: mapping seg %d (txd %d), len %lx, addr %#lx (%#lx)", 1192 __func__, seg, nexttx, txsegs[seg].ds_len, 1193 txsegs[seg].ds_addr, 1194 GEM_DMA_WRITE(sc, txsegs[seg].ds_addr)); 1195 #endif 1196 sc->sc_txdescs[nexttx].gd_addr = 1197 GEM_DMA_WRITE(sc, txsegs[seg].ds_addr); 1198 KASSERT(txsegs[seg].ds_len < GEM_TD_BUFSIZE, 1199 ("%s: segment size too large!", __func__)); 1200 flags = txsegs[seg].ds_len & GEM_TD_BUFSIZE; 1201 sc->sc_txdescs[nexttx].gd_flags = 1202 GEM_DMA_WRITE(sc, flags | cflags); 1203 txs->txs_lastdesc = nexttx; 1204 } 1205 1206 /* Set EOP on the last descriptor. */ 1207 #ifdef GEM_DEBUG 1208 CTR3(KTR_GEM, "%s: end of packet at segment %d, TX %d", 1209 __func__, seg, nexttx); 1210 #endif 1211 sc->sc_txdescs[txs->txs_lastdesc].gd_flags |= 1212 GEM_DMA_WRITE(sc, GEM_TD_END_OF_PACKET); 1213 1214 /* Lastly set SOP on the first descriptor. */ 1215 #ifdef GEM_DEBUG 1216 CTR3(KTR_GEM, "%s: start of packet at segment %d, TX %d", 1217 __func__, seg, nexttx); 1218 #endif 1219 if (++sc->sc_txwin > GEM_NTXSEGS * 2 / 3) { 1220 sc->sc_txwin = 0; 1221 sc->sc_txdescs[txs->txs_firstdesc].gd_flags |= 1222 GEM_DMA_WRITE(sc, GEM_TD_INTERRUPT_ME | 1223 GEM_TD_START_OF_PACKET); 1224 } else 1225 sc->sc_txdescs[txs->txs_firstdesc].gd_flags |= 1226 GEM_DMA_WRITE(sc, GEM_TD_START_OF_PACKET); 1227 1228 /* Sync the DMA map. */ 1229 bus_dmamap_sync(sc->sc_tdmatag, txs->txs_dmamap, 1230 BUS_DMASYNC_PREWRITE); 1231 1232 #ifdef GEM_DEBUG 1233 CTR4(KTR_GEM, "%s: setting firstdesc=%d, lastdesc=%d, ndescs=%d", 1234 __func__, txs->txs_firstdesc, txs->txs_lastdesc, 1235 txs->txs_ndescs); 1236 #endif 1237 STAILQ_REMOVE_HEAD(&sc->sc_txfreeq, txs_q); 1238 STAILQ_INSERT_TAIL(&sc->sc_txdirtyq, txs, txs_q); 1239 txs->txs_mbuf = *m_head; 1240 1241 sc->sc_txnext = GEM_NEXTTX(txs->txs_lastdesc); 1242 sc->sc_txfree -= txs->txs_ndescs; 1243 1244 return (0); 1245 } 1246 1247 static void 1248 gem_init_regs(struct gem_softc *sc) 1249 { 1250 const u_char *laddr = IF_LLADDR(sc->sc_ifp); 1251 1252 GEM_LOCK_ASSERT(sc, MA_OWNED); 1253 1254 /* These registers are not cleared on reset. */ 1255 if ((sc->sc_flags & GEM_INITED) == 0) { 1256 /* magic values */ 1257 GEM_BANK1_WRITE_4(sc, GEM_MAC_IPG0, 0); 1258 GEM_BANK1_WRITE_4(sc, GEM_MAC_IPG1, 8); 1259 GEM_BANK1_WRITE_4(sc, GEM_MAC_IPG2, 4); 1260 1261 /* min frame length */ 1262 GEM_BANK1_WRITE_4(sc, GEM_MAC_MAC_MIN_FRAME, ETHER_MIN_LEN); 1263 /* max frame length and max burst size */ 1264 GEM_BANK1_WRITE_4(sc, GEM_MAC_MAC_MAX_FRAME, 1265 (ETHER_MAX_LEN + ETHER_VLAN_ENCAP_LEN) | (0x2000 << 16)); 1266 1267 /* more magic values */ 1268 GEM_BANK1_WRITE_4(sc, GEM_MAC_PREAMBLE_LEN, 0x7); 1269 GEM_BANK1_WRITE_4(sc, GEM_MAC_JAM_SIZE, 0x4); 1270 GEM_BANK1_WRITE_4(sc, GEM_MAC_ATTEMPT_LIMIT, 0x10); 1271 GEM_BANK1_WRITE_4(sc, GEM_MAC_CONTROL_TYPE, 0x8808); 1272 1273 /* random number seed */ 1274 GEM_BANK1_WRITE_4(sc, GEM_MAC_RANDOM_SEED, 1275 ((laddr[5] << 8) | laddr[4]) & 0x3ff); 1276 1277 /* secondary MAC address: 0:0:0:0:0:0 */ 1278 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR3, 0); 1279 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR4, 0); 1280 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR5, 0); 1281 1282 /* MAC control address: 01:80:c2:00:00:01 */ 1283 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR6, 0x0001); 1284 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR7, 0xc200); 1285 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR8, 0x0180); 1286 1287 /* MAC filter address: 0:0:0:0:0:0 */ 1288 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR_FILTER0, 0); 1289 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR_FILTER1, 0); 1290 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR_FILTER2, 0); 1291 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADR_FLT_MASK1_2, 0); 1292 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADR_FLT_MASK0, 0); 1293 1294 sc->sc_flags |= GEM_INITED; 1295 } 1296 1297 /* Counters need to be zeroed. */ 1298 GEM_BANK1_WRITE_4(sc, GEM_MAC_NORM_COLL_CNT, 0); 1299 GEM_BANK1_WRITE_4(sc, GEM_MAC_FIRST_COLL_CNT, 0); 1300 GEM_BANK1_WRITE_4(sc, GEM_MAC_EXCESS_COLL_CNT, 0); 1301 GEM_BANK1_WRITE_4(sc, GEM_MAC_LATE_COLL_CNT, 0); 1302 GEM_BANK1_WRITE_4(sc, GEM_MAC_DEFER_TMR_CNT, 0); 1303 GEM_BANK1_WRITE_4(sc, GEM_MAC_PEAK_ATTEMPTS, 0); 1304 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_FRAME_COUNT, 0); 1305 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_LEN_ERR_CNT, 0); 1306 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_ALIGN_ERR, 0); 1307 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CRC_ERR_CNT, 0); 1308 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CODE_VIOL, 0); 1309 1310 /* Set XOFF PAUSE time. */ 1311 GEM_BANK1_WRITE_4(sc, GEM_MAC_SEND_PAUSE_CMD, 0x1BF0); 1312 1313 /* Set the station address. */ 1314 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR0, (laddr[4] << 8) | laddr[5]); 1315 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR1, (laddr[2] << 8) | laddr[3]); 1316 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR2, (laddr[0] << 8) | laddr[1]); 1317 1318 /* Enable MII outputs. */ 1319 GEM_BANK1_WRITE_4(sc, GEM_MAC_XIF_CONFIG, GEM_MAC_XIF_TX_MII_ENA); 1320 } 1321 1322 static void 1323 gem_start(struct ifnet *ifp) 1324 { 1325 struct gem_softc *sc = ifp->if_softc; 1326 1327 GEM_LOCK(sc); 1328 gem_start_locked(ifp); 1329 GEM_UNLOCK(sc); 1330 } 1331 1332 static inline void 1333 gem_txkick(struct gem_softc *sc) 1334 { 1335 1336 /* 1337 * Update the TX kick register. This register has to point to the 1338 * descriptor after the last valid one and for optimum performance 1339 * should be incremented in multiples of 4 (the DMA engine fetches/ 1340 * updates descriptors in batches of 4). 1341 */ 1342 #ifdef GEM_DEBUG 1343 CTR3(KTR_GEM, "%s: %s: kicking TX %d", 1344 device_get_name(sc->sc_dev), __func__, sc->sc_txnext); 1345 #endif 1346 GEM_CDSYNC(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1347 GEM_BANK1_WRITE_4(sc, GEM_TX_KICK, sc->sc_txnext); 1348 } 1349 1350 static void 1351 gem_start_locked(struct ifnet *ifp) 1352 { 1353 struct gem_softc *sc = ifp->if_softc; 1354 struct mbuf *m; 1355 int kicked, ntx; 1356 1357 GEM_LOCK_ASSERT(sc, MA_OWNED); 1358 1359 if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) != 1360 IFF_DRV_RUNNING || (sc->sc_flags & GEM_LINK) == 0) 1361 return; 1362 1363 #ifdef GEM_DEBUG 1364 CTR4(KTR_GEM, "%s: %s: txfree %d, txnext %d", 1365 device_get_name(sc->sc_dev), __func__, sc->sc_txfree, 1366 sc->sc_txnext); 1367 #endif 1368 ntx = 0; 1369 kicked = 0; 1370 for (; !IFQ_DRV_IS_EMPTY(&ifp->if_snd) && sc->sc_txfree > 1;) { 1371 IFQ_DRV_DEQUEUE(&ifp->if_snd, m); 1372 if (m == NULL) 1373 break; 1374 if (gem_load_txmbuf(sc, &m) != 0) { 1375 if (m == NULL) 1376 break; 1377 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 1378 IFQ_DRV_PREPEND(&ifp->if_snd, m); 1379 break; 1380 } 1381 if ((sc->sc_txnext % 4) == 0) { 1382 gem_txkick(sc); 1383 kicked = 1; 1384 } else 1385 kicked = 0; 1386 ntx++; 1387 BPF_MTAP(ifp, m); 1388 } 1389 1390 if (ntx > 0) { 1391 if (kicked == 0) 1392 gem_txkick(sc); 1393 #ifdef GEM_DEBUG 1394 CTR2(KTR_GEM, "%s: packets enqueued, OWN on %d", 1395 device_get_name(sc->sc_dev), sc->sc_txnext); 1396 #endif 1397 1398 /* Set a watchdog timer in case the chip flakes out. */ 1399 sc->sc_wdog_timer = 5; 1400 #ifdef GEM_DEBUG 1401 CTR3(KTR_GEM, "%s: %s: watchdog %d", 1402 device_get_name(sc->sc_dev), __func__, 1403 sc->sc_wdog_timer); 1404 #endif 1405 } 1406 } 1407 1408 static void 1409 gem_tint(struct gem_softc *sc) 1410 { 1411 struct ifnet *ifp = sc->sc_ifp; 1412 struct gem_txsoft *txs; 1413 int progress; 1414 uint32_t txlast; 1415 #ifdef GEM_DEBUG 1416 int i; 1417 1418 GEM_LOCK_ASSERT(sc, MA_OWNED); 1419 1420 CTR2(KTR_GEM, "%s: %s", device_get_name(sc->sc_dev), __func__); 1421 #endif 1422 1423 /* 1424 * Go through our TX list and free mbufs for those 1425 * frames that have been transmitted. 1426 */ 1427 progress = 0; 1428 GEM_CDSYNC(sc, BUS_DMASYNC_POSTREAD); 1429 while ((txs = STAILQ_FIRST(&sc->sc_txdirtyq)) != NULL) { 1430 #ifdef GEM_DEBUG 1431 if ((ifp->if_flags & IFF_DEBUG) != 0) { 1432 printf(" txsoft %p transmit chain:\n", txs); 1433 for (i = txs->txs_firstdesc;; i = GEM_NEXTTX(i)) { 1434 printf("descriptor %d: ", i); 1435 printf("gd_flags: 0x%016llx\t", 1436 (long long)GEM_DMA_READ(sc, 1437 sc->sc_txdescs[i].gd_flags)); 1438 printf("gd_addr: 0x%016llx\n", 1439 (long long)GEM_DMA_READ(sc, 1440 sc->sc_txdescs[i].gd_addr)); 1441 if (i == txs->txs_lastdesc) 1442 break; 1443 } 1444 } 1445 #endif 1446 1447 /* 1448 * In theory, we could harvest some descriptors before 1449 * the ring is empty, but that's a bit complicated. 1450 * 1451 * GEM_TX_COMPLETION points to the last descriptor 1452 * processed + 1. 1453 */ 1454 txlast = GEM_BANK1_READ_4(sc, GEM_TX_COMPLETION); 1455 #ifdef GEM_DEBUG 1456 CTR4(KTR_GEM, "%s: txs->txs_firstdesc = %d, " 1457 "txs->txs_lastdesc = %d, txlast = %d", 1458 __func__, txs->txs_firstdesc, txs->txs_lastdesc, txlast); 1459 #endif 1460 if (txs->txs_firstdesc <= txs->txs_lastdesc) { 1461 if ((txlast >= txs->txs_firstdesc) && 1462 (txlast <= txs->txs_lastdesc)) 1463 break; 1464 } else { 1465 /* Ick -- this command wraps. */ 1466 if ((txlast >= txs->txs_firstdesc) || 1467 (txlast <= txs->txs_lastdesc)) 1468 break; 1469 } 1470 1471 #ifdef GEM_DEBUG 1472 CTR1(KTR_GEM, "%s: releasing a descriptor", __func__); 1473 #endif 1474 STAILQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q); 1475 1476 sc->sc_txfree += txs->txs_ndescs; 1477 1478 bus_dmamap_sync(sc->sc_tdmatag, txs->txs_dmamap, 1479 BUS_DMASYNC_POSTWRITE); 1480 bus_dmamap_unload(sc->sc_tdmatag, txs->txs_dmamap); 1481 if (txs->txs_mbuf != NULL) { 1482 m_freem(txs->txs_mbuf); 1483 txs->txs_mbuf = NULL; 1484 } 1485 1486 STAILQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 1487 1488 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 1489 progress = 1; 1490 } 1491 1492 #ifdef GEM_DEBUG 1493 CTR4(KTR_GEM, "%s: GEM_TX_STATE_MACHINE %x GEM_TX_DATA_PTR %llx " 1494 "GEM_TX_COMPLETION %x", 1495 __func__, GEM_BANK1_READ_4(sc, GEM_TX_STATE_MACHINE), 1496 ((long long)GEM_BANK1_READ_4(sc, GEM_TX_DATA_PTR_HI) << 32) | 1497 GEM_BANK1_READ_4(sc, GEM_TX_DATA_PTR_LO), 1498 GEM_BANK1_READ_4(sc, GEM_TX_COMPLETION)); 1499 #endif 1500 1501 if (progress) { 1502 if (sc->sc_txfree == GEM_NTXDESC - 1) 1503 sc->sc_txwin = 0; 1504 1505 /* 1506 * We freed some descriptors, so reset IFF_DRV_OACTIVE 1507 * and restart. 1508 */ 1509 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1510 if (STAILQ_EMPTY(&sc->sc_txdirtyq)) 1511 sc->sc_wdog_timer = 0; 1512 gem_start_locked(ifp); 1513 } 1514 1515 #ifdef GEM_DEBUG 1516 CTR3(KTR_GEM, "%s: %s: watchdog %d", 1517 device_get_name(sc->sc_dev), __func__, sc->sc_wdog_timer); 1518 #endif 1519 } 1520 1521 #ifdef GEM_RINT_TIMEOUT 1522 static void 1523 gem_rint_timeout(void *arg) 1524 { 1525 struct gem_softc *sc = arg; 1526 1527 GEM_LOCK_ASSERT(sc, MA_OWNED); 1528 1529 gem_rint(sc); 1530 } 1531 #endif 1532 1533 static void 1534 gem_rint(struct gem_softc *sc) 1535 { 1536 struct ifnet *ifp = sc->sc_ifp; 1537 struct mbuf *m; 1538 uint64_t rxstat; 1539 uint32_t rxcomp; 1540 1541 GEM_LOCK_ASSERT(sc, MA_OWNED); 1542 1543 #ifdef GEM_RINT_TIMEOUT 1544 callout_stop(&sc->sc_rx_ch); 1545 #endif 1546 #ifdef GEM_DEBUG 1547 CTR2(KTR_GEM, "%s: %s", device_get_name(sc->sc_dev), __func__); 1548 #endif 1549 1550 /* 1551 * Read the completion register once. This limits 1552 * how long the following loop can execute. 1553 */ 1554 rxcomp = GEM_BANK1_READ_4(sc, GEM_RX_COMPLETION); 1555 #ifdef GEM_DEBUG 1556 CTR3(KTR_GEM, "%s: sc->sc_rxptr %d, complete %d", 1557 __func__, sc->sc_rxptr, rxcomp); 1558 #endif 1559 GEM_CDSYNC(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1560 for (; sc->sc_rxptr != rxcomp;) { 1561 m = sc->sc_rxsoft[sc->sc_rxptr].rxs_mbuf; 1562 rxstat = GEM_DMA_READ(sc, 1563 sc->sc_rxdescs[sc->sc_rxptr].gd_flags); 1564 1565 if (rxstat & GEM_RD_OWN) { 1566 #ifdef GEM_RINT_TIMEOUT 1567 /* 1568 * The descriptor is still marked as owned, although 1569 * it is supposed to have completed. This has been 1570 * observed on some machines. Just exiting here 1571 * might leave the packet sitting around until another 1572 * one arrives to trigger a new interrupt, which is 1573 * generally undesirable, so set up a timeout. 1574 */ 1575 callout_reset(&sc->sc_rx_ch, GEM_RXOWN_TICKS, 1576 gem_rint_timeout, sc); 1577 #endif 1578 m = NULL; 1579 goto kickit; 1580 } 1581 1582 if (rxstat & GEM_RD_BAD_CRC) { 1583 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 1584 device_printf(sc->sc_dev, "receive error: CRC error\n"); 1585 GEM_INIT_RXDESC(sc, sc->sc_rxptr); 1586 m = NULL; 1587 goto kickit; 1588 } 1589 1590 #ifdef GEM_DEBUG 1591 if ((ifp->if_flags & IFF_DEBUG) != 0) { 1592 printf(" rxsoft %p descriptor %d: ", 1593 &sc->sc_rxsoft[sc->sc_rxptr], sc->sc_rxptr); 1594 printf("gd_flags: 0x%016llx\t", 1595 (long long)GEM_DMA_READ(sc, 1596 sc->sc_rxdescs[sc->sc_rxptr].gd_flags)); 1597 printf("gd_addr: 0x%016llx\n", 1598 (long long)GEM_DMA_READ(sc, 1599 sc->sc_rxdescs[sc->sc_rxptr].gd_addr)); 1600 } 1601 #endif 1602 1603 /* 1604 * Allocate a new mbuf cluster. If that fails, we are 1605 * out of memory, and must drop the packet and recycle 1606 * the buffer that's already attached to this descriptor. 1607 */ 1608 if (gem_add_rxbuf(sc, sc->sc_rxptr) != 0) { 1609 if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1); 1610 GEM_INIT_RXDESC(sc, sc->sc_rxptr); 1611 m = NULL; 1612 } 1613 1614 kickit: 1615 /* 1616 * Update the RX kick register. This register has to point 1617 * to the descriptor after the last valid one (before the 1618 * current batch) and for optimum performance should be 1619 * incremented in multiples of 4 (the DMA engine fetches/ 1620 * updates descriptors in batches of 4). 1621 */ 1622 sc->sc_rxptr = GEM_NEXTRX(sc->sc_rxptr); 1623 if ((sc->sc_rxptr % 4) == 0) { 1624 GEM_CDSYNC(sc, 1625 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1626 GEM_BANK1_WRITE_4(sc, GEM_RX_KICK, 1627 (sc->sc_rxptr + GEM_NRXDESC - 4) & 1628 GEM_NRXDESC_MASK); 1629 } 1630 1631 if (m == NULL) { 1632 if (rxstat & GEM_RD_OWN) 1633 break; 1634 continue; 1635 } 1636 1637 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); 1638 m->m_data += ETHER_ALIGN; /* first byte offset */ 1639 m->m_pkthdr.rcvif = ifp; 1640 m->m_pkthdr.len = m->m_len = GEM_RD_BUFLEN(rxstat); 1641 1642 if ((ifp->if_capenable & IFCAP_RXCSUM) != 0) 1643 gem_rxcksum(m, rxstat); 1644 1645 /* Pass it on. */ 1646 GEM_UNLOCK(sc); 1647 (*ifp->if_input)(ifp, m); 1648 GEM_LOCK(sc); 1649 } 1650 1651 #ifdef GEM_DEBUG 1652 CTR3(KTR_GEM, "%s: done sc->sc_rxptr %d, complete %d", __func__, 1653 sc->sc_rxptr, GEM_BANK1_READ_4(sc, GEM_RX_COMPLETION)); 1654 #endif 1655 } 1656 1657 static int 1658 gem_add_rxbuf(struct gem_softc *sc, int idx) 1659 { 1660 struct gem_rxsoft *rxs = &sc->sc_rxsoft[idx]; 1661 struct mbuf *m; 1662 bus_dma_segment_t segs[1]; 1663 int error, nsegs; 1664 1665 GEM_LOCK_ASSERT(sc, MA_OWNED); 1666 1667 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 1668 if (m == NULL) 1669 return (ENOBUFS); 1670 m->m_len = m->m_pkthdr.len = m->m_ext.ext_size; 1671 1672 #ifdef GEM_DEBUG 1673 /* Bzero the packet to check DMA. */ 1674 memset(m->m_ext.ext_buf, 0, m->m_ext.ext_size); 1675 #endif 1676 1677 if (rxs->rxs_mbuf != NULL) { 1678 bus_dmamap_sync(sc->sc_rdmatag, rxs->rxs_dmamap, 1679 BUS_DMASYNC_POSTREAD); 1680 bus_dmamap_unload(sc->sc_rdmatag, rxs->rxs_dmamap); 1681 } 1682 1683 error = bus_dmamap_load_mbuf_sg(sc->sc_rdmatag, rxs->rxs_dmamap, 1684 m, segs, &nsegs, BUS_DMA_NOWAIT); 1685 if (error != 0) { 1686 device_printf(sc->sc_dev, 1687 "cannot load RS DMA map %d, error = %d\n", idx, error); 1688 m_freem(m); 1689 return (error); 1690 } 1691 /* If nsegs is wrong then the stack is corrupt. */ 1692 KASSERT(nsegs == 1, 1693 ("%s: too many DMA segments (%d)", __func__, nsegs)); 1694 rxs->rxs_mbuf = m; 1695 rxs->rxs_paddr = segs[0].ds_addr; 1696 1697 bus_dmamap_sync(sc->sc_rdmatag, rxs->rxs_dmamap, 1698 BUS_DMASYNC_PREREAD); 1699 1700 GEM_INIT_RXDESC(sc, idx); 1701 1702 return (0); 1703 } 1704 1705 static void 1706 gem_eint(struct gem_softc *sc, u_int status) 1707 { 1708 1709 if_inc_counter(sc->sc_ifp, IFCOUNTER_IERRORS, 1); 1710 if ((status & GEM_INTR_RX_TAG_ERR) != 0) { 1711 gem_reset_rxdma(sc); 1712 return; 1713 } 1714 1715 device_printf(sc->sc_dev, "%s: status 0x%x", __func__, status); 1716 if ((status & GEM_INTR_BERR) != 0) { 1717 if ((sc->sc_flags & GEM_PCI) != 0) 1718 printf(", PCI bus error 0x%x\n", 1719 GEM_BANK1_READ_4(sc, GEM_PCI_ERROR_STATUS)); 1720 else 1721 printf(", SBus error 0x%x\n", 1722 GEM_BANK1_READ_4(sc, GEM_SBUS_STATUS)); 1723 } 1724 } 1725 1726 void 1727 gem_intr(void *v) 1728 { 1729 struct gem_softc *sc = v; 1730 uint32_t status, status2; 1731 1732 GEM_LOCK(sc); 1733 status = GEM_BANK1_READ_4(sc, GEM_STATUS); 1734 1735 #ifdef GEM_DEBUG 1736 CTR4(KTR_GEM, "%s: %s: cplt %x, status %x", 1737 device_get_name(sc->sc_dev), __func__, 1738 (status >> GEM_STATUS_TX_COMPLETION_SHFT), (u_int)status); 1739 1740 /* 1741 * PCS interrupts must be cleared, otherwise no traffic is passed! 1742 */ 1743 if ((status & GEM_INTR_PCS) != 0) { 1744 status2 = 1745 GEM_BANK1_READ_4(sc, GEM_MII_INTERRUP_STATUS) | 1746 GEM_BANK1_READ_4(sc, GEM_MII_INTERRUP_STATUS); 1747 if ((status2 & GEM_MII_INTERRUP_LINK) != 0) 1748 device_printf(sc->sc_dev, 1749 "%s: PCS link status changed\n", __func__); 1750 } 1751 if ((status & GEM_MAC_CONTROL_STATUS) != 0) { 1752 status2 = GEM_BANK1_READ_4(sc, GEM_MAC_CONTROL_STATUS); 1753 if ((status2 & GEM_MAC_PAUSED) != 0) 1754 device_printf(sc->sc_dev, 1755 "%s: PAUSE received (PAUSE time %d slots)\n", 1756 __func__, GEM_MAC_PAUSE_TIME(status2)); 1757 if ((status2 & GEM_MAC_PAUSE) != 0) 1758 device_printf(sc->sc_dev, 1759 "%s: transited to PAUSE state\n", __func__); 1760 if ((status2 & GEM_MAC_RESUME) != 0) 1761 device_printf(sc->sc_dev, 1762 "%s: transited to non-PAUSE state\n", __func__); 1763 } 1764 if ((status & GEM_INTR_MIF) != 0) 1765 device_printf(sc->sc_dev, "%s: MIF interrupt\n", __func__); 1766 #endif 1767 1768 if (__predict_false(status & 1769 (GEM_INTR_RX_TAG_ERR | GEM_INTR_PERR | GEM_INTR_BERR)) != 0) 1770 gem_eint(sc, status); 1771 1772 if ((status & (GEM_INTR_RX_DONE | GEM_INTR_RX_NOBUF)) != 0) 1773 gem_rint(sc); 1774 1775 if ((status & (GEM_INTR_TX_EMPTY | GEM_INTR_TX_INTME)) != 0) 1776 gem_tint(sc); 1777 1778 if (__predict_false((status & GEM_INTR_TX_MAC) != 0)) { 1779 status2 = GEM_BANK1_READ_4(sc, GEM_MAC_TX_STATUS); 1780 if ((status2 & 1781 ~(GEM_MAC_TX_XMIT_DONE | GEM_MAC_TX_DEFER_EXP | 1782 GEM_MAC_TX_PEAK_EXP)) != 0) 1783 device_printf(sc->sc_dev, 1784 "MAC TX fault, status %x\n", status2); 1785 if ((status2 & 1786 (GEM_MAC_TX_UNDERRUN | GEM_MAC_TX_PKT_TOO_LONG)) != 0) { 1787 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1); 1788 sc->sc_ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1789 gem_init_locked(sc); 1790 } 1791 } 1792 if (__predict_false((status & GEM_INTR_RX_MAC) != 0)) { 1793 status2 = GEM_BANK1_READ_4(sc, GEM_MAC_RX_STATUS); 1794 /* 1795 * At least with GEM_SUN_GEM and some GEM_SUN_ERI 1796 * revisions GEM_MAC_RX_OVERFLOW happen often due to a 1797 * silicon bug so handle them silently. Moreover, it's 1798 * likely that the receiver has hung so we reset it. 1799 */ 1800 if ((status2 & GEM_MAC_RX_OVERFLOW) != 0) { 1801 if_inc_counter(sc->sc_ifp, IFCOUNTER_IERRORS, 1); 1802 gem_reset_rxdma(sc); 1803 } else if ((status2 & 1804 ~(GEM_MAC_RX_DONE | GEM_MAC_RX_FRAME_CNT)) != 0) 1805 device_printf(sc->sc_dev, 1806 "MAC RX fault, status %x\n", status2); 1807 } 1808 GEM_UNLOCK(sc); 1809 } 1810 1811 static int 1812 gem_watchdog(struct gem_softc *sc) 1813 { 1814 struct ifnet *ifp = sc->sc_ifp; 1815 1816 GEM_LOCK_ASSERT(sc, MA_OWNED); 1817 1818 #ifdef GEM_DEBUG 1819 CTR4(KTR_GEM, 1820 "%s: GEM_RX_CONFIG %x GEM_MAC_RX_STATUS %x GEM_MAC_RX_CONFIG %x", 1821 __func__, GEM_BANK1_READ_4(sc, GEM_RX_CONFIG), 1822 GEM_BANK1_READ_4(sc, GEM_MAC_RX_STATUS), 1823 GEM_BANK1_READ_4(sc, GEM_MAC_RX_CONFIG)); 1824 CTR4(KTR_GEM, 1825 "%s: GEM_TX_CONFIG %x GEM_MAC_TX_STATUS %x GEM_MAC_TX_CONFIG %x", 1826 __func__, GEM_BANK1_READ_4(sc, GEM_TX_CONFIG), 1827 GEM_BANK1_READ_4(sc, GEM_MAC_TX_STATUS), 1828 GEM_BANK1_READ_4(sc, GEM_MAC_TX_CONFIG)); 1829 #endif 1830 1831 if (sc->sc_wdog_timer == 0 || --sc->sc_wdog_timer != 0) 1832 return (0); 1833 1834 if ((sc->sc_flags & GEM_LINK) != 0) 1835 device_printf(sc->sc_dev, "device timeout\n"); 1836 else if (bootverbose) 1837 device_printf(sc->sc_dev, "device timeout (no link)\n"); 1838 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1839 1840 /* Try to get more packets going. */ 1841 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1842 gem_init_locked(sc); 1843 gem_start_locked(ifp); 1844 return (EJUSTRETURN); 1845 } 1846 1847 static void 1848 gem_mifinit(struct gem_softc *sc) 1849 { 1850 1851 /* Configure the MIF in frame mode. */ 1852 GEM_BANK1_WRITE_4(sc, GEM_MIF_CONFIG, 1853 GEM_BANK1_READ_4(sc, GEM_MIF_CONFIG) & ~GEM_MIF_CONFIG_BB_ENA); 1854 GEM_BANK1_BARRIER(sc, GEM_MIF_CONFIG, 4, 1855 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 1856 } 1857 1858 /* 1859 * MII interface 1860 * 1861 * The MII interface supports at least three different operating modes: 1862 * 1863 * Bitbang mode is implemented using data, clock and output enable registers. 1864 * 1865 * Frame mode is implemented by loading a complete frame into the frame 1866 * register and polling the valid bit for completion. 1867 * 1868 * Polling mode uses the frame register but completion is indicated by 1869 * an interrupt. 1870 * 1871 */ 1872 int 1873 gem_mii_readreg(device_t dev, int phy, int reg) 1874 { 1875 struct gem_softc *sc; 1876 int n; 1877 uint32_t v; 1878 1879 #ifdef GEM_DEBUG_PHY 1880 printf("%s: phy %d reg %d\n", __func__, phy, reg); 1881 #endif 1882 1883 sc = device_get_softc(dev); 1884 if ((sc->sc_flags & GEM_SERDES) != 0) { 1885 switch (reg) { 1886 case MII_BMCR: 1887 reg = GEM_MII_CONTROL; 1888 break; 1889 case MII_BMSR: 1890 reg = GEM_MII_STATUS; 1891 break; 1892 case MII_PHYIDR1: 1893 case MII_PHYIDR2: 1894 return (0); 1895 case MII_ANAR: 1896 reg = GEM_MII_ANAR; 1897 break; 1898 case MII_ANLPAR: 1899 reg = GEM_MII_ANLPAR; 1900 break; 1901 case MII_EXTSR: 1902 return (EXTSR_1000XFDX | EXTSR_1000XHDX); 1903 default: 1904 device_printf(sc->sc_dev, 1905 "%s: unhandled register %d\n", __func__, reg); 1906 return (0); 1907 } 1908 return (GEM_BANK1_READ_4(sc, reg)); 1909 } 1910 1911 /* Construct the frame command. */ 1912 v = GEM_MIF_FRAME_READ | 1913 (phy << GEM_MIF_PHY_SHIFT) | 1914 (reg << GEM_MIF_REG_SHIFT); 1915 1916 GEM_BANK1_WRITE_4(sc, GEM_MIF_FRAME, v); 1917 GEM_BANK1_BARRIER(sc, GEM_MIF_FRAME, 4, 1918 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 1919 for (n = 0; n < 100; n++) { 1920 DELAY(1); 1921 v = GEM_BANK1_READ_4(sc, GEM_MIF_FRAME); 1922 if (v & GEM_MIF_FRAME_TA0) 1923 return (v & GEM_MIF_FRAME_DATA); 1924 } 1925 1926 device_printf(sc->sc_dev, "%s: timed out\n", __func__); 1927 return (0); 1928 } 1929 1930 int 1931 gem_mii_writereg(device_t dev, int phy, int reg, int val) 1932 { 1933 struct gem_softc *sc; 1934 int n; 1935 uint32_t v; 1936 1937 #ifdef GEM_DEBUG_PHY 1938 printf("%s: phy %d reg %d val %x\n", phy, reg, val, __func__); 1939 #endif 1940 1941 sc = device_get_softc(dev); 1942 if ((sc->sc_flags & GEM_SERDES) != 0) { 1943 switch (reg) { 1944 case MII_BMSR: 1945 reg = GEM_MII_STATUS; 1946 break; 1947 case MII_BMCR: 1948 reg = GEM_MII_CONTROL; 1949 if ((val & GEM_MII_CONTROL_RESET) == 0) 1950 break; 1951 GEM_BANK1_WRITE_4(sc, GEM_MII_CONTROL, val); 1952 GEM_BANK1_BARRIER(sc, GEM_MII_CONTROL, 4, 1953 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 1954 if (!GEM_BANK1_BITWAIT(sc, GEM_MII_CONTROL, 1955 GEM_MII_CONTROL_RESET, 0)) 1956 device_printf(sc->sc_dev, 1957 "cannot reset PCS\n"); 1958 /* FALLTHROUGH */ 1959 case MII_ANAR: 1960 GEM_BANK1_WRITE_4(sc, GEM_MII_CONFIG, 0); 1961 GEM_BANK1_BARRIER(sc, GEM_MII_CONFIG, 4, 1962 BUS_SPACE_BARRIER_WRITE); 1963 GEM_BANK1_WRITE_4(sc, GEM_MII_ANAR, val); 1964 GEM_BANK1_BARRIER(sc, GEM_MII_ANAR, 4, 1965 BUS_SPACE_BARRIER_WRITE); 1966 GEM_BANK1_WRITE_4(sc, GEM_MII_SLINK_CONTROL, 1967 GEM_MII_SLINK_LOOPBACK | GEM_MII_SLINK_EN_SYNC_D); 1968 GEM_BANK1_BARRIER(sc, GEM_MII_SLINK_CONTROL, 4, 1969 BUS_SPACE_BARRIER_WRITE); 1970 GEM_BANK1_WRITE_4(sc, GEM_MII_CONFIG, 1971 GEM_MII_CONFIG_ENABLE); 1972 GEM_BANK1_BARRIER(sc, GEM_MII_CONFIG, 4, 1973 BUS_SPACE_BARRIER_WRITE); 1974 return (0); 1975 case MII_ANLPAR: 1976 reg = GEM_MII_ANLPAR; 1977 break; 1978 default: 1979 device_printf(sc->sc_dev, 1980 "%s: unhandled register %d\n", __func__, reg); 1981 return (0); 1982 } 1983 GEM_BANK1_WRITE_4(sc, reg, val); 1984 GEM_BANK1_BARRIER(sc, reg, 4, 1985 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 1986 return (0); 1987 } 1988 1989 /* Construct the frame command. */ 1990 v = GEM_MIF_FRAME_WRITE | 1991 (phy << GEM_MIF_PHY_SHIFT) | 1992 (reg << GEM_MIF_REG_SHIFT) | 1993 (val & GEM_MIF_FRAME_DATA); 1994 1995 GEM_BANK1_WRITE_4(sc, GEM_MIF_FRAME, v); 1996 GEM_BANK1_BARRIER(sc, GEM_MIF_FRAME, 4, 1997 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 1998 for (n = 0; n < 100; n++) { 1999 DELAY(1); 2000 v = GEM_BANK1_READ_4(sc, GEM_MIF_FRAME); 2001 if (v & GEM_MIF_FRAME_TA0) 2002 return (1); 2003 } 2004 2005 device_printf(sc->sc_dev, "%s: timed out\n", __func__); 2006 return (0); 2007 } 2008 2009 void 2010 gem_mii_statchg(device_t dev) 2011 { 2012 struct gem_softc *sc; 2013 int gigabit; 2014 uint32_t rxcfg, txcfg, v; 2015 2016 sc = device_get_softc(dev); 2017 2018 GEM_LOCK_ASSERT(sc, MA_OWNED); 2019 2020 #ifdef GEM_DEBUG 2021 if ((sc->sc_ifp->if_flags & IFF_DEBUG) != 0) 2022 device_printf(sc->sc_dev, "%s: status change\n", __func__); 2023 #endif 2024 2025 if ((sc->sc_mii->mii_media_status & IFM_ACTIVE) != 0 && 2026 IFM_SUBTYPE(sc->sc_mii->mii_media_active) != IFM_NONE) 2027 sc->sc_flags |= GEM_LINK; 2028 else 2029 sc->sc_flags &= ~GEM_LINK; 2030 2031 switch (IFM_SUBTYPE(sc->sc_mii->mii_media_active)) { 2032 case IFM_1000_SX: 2033 case IFM_1000_LX: 2034 case IFM_1000_CX: 2035 case IFM_1000_T: 2036 gigabit = 1; 2037 break; 2038 default: 2039 gigabit = 0; 2040 } 2041 2042 /* 2043 * The configuration done here corresponds to the steps F) and 2044 * G) and as far as enabling of RX and TX MAC goes also step H) 2045 * of the initialization sequence outlined in section 3.2.1 of 2046 * the GEM Gigabit Ethernet ASIC Specification. 2047 */ 2048 2049 rxcfg = sc->sc_mac_rxcfg; 2050 rxcfg &= ~GEM_MAC_RX_CARR_EXTEND; 2051 txcfg = GEM_MAC_TX_ENA_IPG0 | GEM_MAC_TX_NGU | GEM_MAC_TX_NGU_LIMIT; 2052 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & IFM_FDX) != 0) 2053 txcfg |= GEM_MAC_TX_IGN_CARRIER | GEM_MAC_TX_IGN_COLLIS; 2054 else if (gigabit != 0) { 2055 rxcfg |= GEM_MAC_RX_CARR_EXTEND; 2056 txcfg |= GEM_MAC_TX_CARR_EXTEND; 2057 } 2058 (void)gem_disable_tx(sc); 2059 GEM_BANK1_WRITE_4(sc, GEM_MAC_TX_CONFIG, txcfg); 2060 (void)gem_disable_rx(sc); 2061 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CONFIG, rxcfg); 2062 2063 v = GEM_BANK1_READ_4(sc, GEM_MAC_CONTROL_CONFIG) & 2064 ~(GEM_MAC_CC_RX_PAUSE | GEM_MAC_CC_TX_PAUSE); 2065 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & 2066 IFM_ETH_RXPAUSE) != 0) 2067 v |= GEM_MAC_CC_RX_PAUSE; 2068 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & 2069 IFM_ETH_TXPAUSE) != 0) 2070 v |= GEM_MAC_CC_TX_PAUSE; 2071 GEM_BANK1_WRITE_4(sc, GEM_MAC_CONTROL_CONFIG, v); 2072 2073 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & IFM_FDX) == 0 && 2074 gigabit != 0) 2075 GEM_BANK1_WRITE_4(sc, GEM_MAC_SLOT_TIME, 2076 GEM_MAC_SLOT_TIME_CARR_EXTEND); 2077 else 2078 GEM_BANK1_WRITE_4(sc, GEM_MAC_SLOT_TIME, 2079 GEM_MAC_SLOT_TIME_NORMAL); 2080 2081 /* XIF Configuration */ 2082 v = GEM_MAC_XIF_LINK_LED; 2083 v |= GEM_MAC_XIF_TX_MII_ENA; 2084 if ((sc->sc_flags & GEM_SERDES) == 0) { 2085 if ((GEM_BANK1_READ_4(sc, GEM_MIF_CONFIG) & 2086 GEM_MIF_CONFIG_PHY_SEL) != 0) { 2087 /* External MII needs echo disable if half duplex. */ 2088 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & 2089 IFM_FDX) == 0) 2090 v |= GEM_MAC_XIF_ECHO_DISABL; 2091 } else 2092 /* 2093 * Internal MII needs buffer enable. 2094 * XXX buffer enable makes only sense for an 2095 * external PHY. 2096 */ 2097 v |= GEM_MAC_XIF_MII_BUF_ENA; 2098 } 2099 if (gigabit != 0) 2100 v |= GEM_MAC_XIF_GMII_MODE; 2101 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & IFM_FDX) != 0) 2102 v |= GEM_MAC_XIF_FDPLX_LED; 2103 GEM_BANK1_WRITE_4(sc, GEM_MAC_XIF_CONFIG, v); 2104 2105 sc->sc_mac_rxcfg = rxcfg; 2106 if ((sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) != 0 && 2107 (sc->sc_flags & GEM_LINK) != 0) { 2108 GEM_BANK1_WRITE_4(sc, GEM_MAC_TX_CONFIG, 2109 txcfg | GEM_MAC_TX_ENABLE); 2110 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CONFIG, 2111 rxcfg | GEM_MAC_RX_ENABLE); 2112 } 2113 } 2114 2115 int 2116 gem_mediachange(struct ifnet *ifp) 2117 { 2118 struct gem_softc *sc = ifp->if_softc; 2119 int error; 2120 2121 /* XXX add support for serial media. */ 2122 2123 GEM_LOCK(sc); 2124 error = mii_mediachg(sc->sc_mii); 2125 GEM_UNLOCK(sc); 2126 return (error); 2127 } 2128 2129 void 2130 gem_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) 2131 { 2132 struct gem_softc *sc = ifp->if_softc; 2133 2134 GEM_LOCK(sc); 2135 if ((ifp->if_flags & IFF_UP) == 0) { 2136 GEM_UNLOCK(sc); 2137 return; 2138 } 2139 2140 mii_pollstat(sc->sc_mii); 2141 ifmr->ifm_active = sc->sc_mii->mii_media_active; 2142 ifmr->ifm_status = sc->sc_mii->mii_media_status; 2143 GEM_UNLOCK(sc); 2144 } 2145 2146 static int 2147 gem_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 2148 { 2149 struct gem_softc *sc = ifp->if_softc; 2150 struct ifreq *ifr = (struct ifreq *)data; 2151 int error; 2152 2153 error = 0; 2154 switch (cmd) { 2155 case SIOCSIFFLAGS: 2156 GEM_LOCK(sc); 2157 if ((ifp->if_flags & IFF_UP) != 0) { 2158 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0 && 2159 ((ifp->if_flags ^ sc->sc_ifflags) & 2160 (IFF_ALLMULTI | IFF_PROMISC)) != 0) 2161 gem_setladrf(sc); 2162 else 2163 gem_init_locked(sc); 2164 } else if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) 2165 gem_stop(ifp, 0); 2166 if ((ifp->if_flags & IFF_LINK0) != 0) 2167 sc->sc_csum_features |= CSUM_UDP; 2168 else 2169 sc->sc_csum_features &= ~CSUM_UDP; 2170 if ((ifp->if_capenable & IFCAP_TXCSUM) != 0) 2171 ifp->if_hwassist = sc->sc_csum_features; 2172 sc->sc_ifflags = ifp->if_flags; 2173 GEM_UNLOCK(sc); 2174 break; 2175 case SIOCADDMULTI: 2176 case SIOCDELMULTI: 2177 GEM_LOCK(sc); 2178 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) 2179 gem_setladrf(sc); 2180 GEM_UNLOCK(sc); 2181 break; 2182 case SIOCGIFMEDIA: 2183 case SIOCSIFMEDIA: 2184 error = ifmedia_ioctl(ifp, ifr, &sc->sc_mii->mii_media, cmd); 2185 break; 2186 case SIOCSIFCAP: 2187 GEM_LOCK(sc); 2188 ifp->if_capenable = ifr->ifr_reqcap; 2189 if ((ifp->if_capenable & IFCAP_TXCSUM) != 0) 2190 ifp->if_hwassist = sc->sc_csum_features; 2191 else 2192 ifp->if_hwassist = 0; 2193 GEM_UNLOCK(sc); 2194 break; 2195 default: 2196 error = ether_ioctl(ifp, cmd, data); 2197 break; 2198 } 2199 2200 return (error); 2201 } 2202 2203 static void 2204 gem_setladrf(struct gem_softc *sc) 2205 { 2206 struct ifnet *ifp = sc->sc_ifp; 2207 struct ifmultiaddr *inm; 2208 int i; 2209 uint32_t hash[16]; 2210 uint32_t crc, v; 2211 2212 GEM_LOCK_ASSERT(sc, MA_OWNED); 2213 2214 /* 2215 * Turn off the RX MAC and the hash filter as required by the Sun GEM 2216 * programming restrictions. 2217 */ 2218 v = sc->sc_mac_rxcfg & ~GEM_MAC_RX_HASH_FILTER; 2219 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CONFIG, v); 2220 GEM_BANK1_BARRIER(sc, GEM_MAC_RX_CONFIG, 4, 2221 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 2222 if (!GEM_BANK1_BITWAIT(sc, GEM_MAC_RX_CONFIG, GEM_MAC_RX_HASH_FILTER | 2223 GEM_MAC_RX_ENABLE, 0)) 2224 device_printf(sc->sc_dev, 2225 "cannot disable RX MAC or hash filter\n"); 2226 2227 v &= ~(GEM_MAC_RX_PROMISCUOUS | GEM_MAC_RX_PROMISC_GRP); 2228 if ((ifp->if_flags & IFF_PROMISC) != 0) { 2229 v |= GEM_MAC_RX_PROMISCUOUS; 2230 goto chipit; 2231 } 2232 if ((ifp->if_flags & IFF_ALLMULTI) != 0) { 2233 v |= GEM_MAC_RX_PROMISC_GRP; 2234 goto chipit; 2235 } 2236 2237 /* 2238 * Set up multicast address filter by passing all multicast 2239 * addresses through a crc generator, and then using the high 2240 * order 8 bits as an index into the 256 bit logical address 2241 * filter. The high order 4 bits selects the word, while the 2242 * other 4 bits select the bit within the word (where bit 0 2243 * is the MSB). 2244 */ 2245 2246 /* Clear the hash table. */ 2247 memset(hash, 0, sizeof(hash)); 2248 2249 if_maddr_rlock(ifp); 2250 TAILQ_FOREACH(inm, &ifp->if_multiaddrs, ifma_link) { 2251 if (inm->ifma_addr->sa_family != AF_LINK) 2252 continue; 2253 crc = ether_crc32_le(LLADDR((struct sockaddr_dl *) 2254 inm->ifma_addr), ETHER_ADDR_LEN); 2255 2256 /* We just want the 8 most significant bits. */ 2257 crc >>= 24; 2258 2259 /* Set the corresponding bit in the filter. */ 2260 hash[crc >> 4] |= 1 << (15 - (crc & 15)); 2261 } 2262 if_maddr_runlock(ifp); 2263 2264 v |= GEM_MAC_RX_HASH_FILTER; 2265 2266 /* Now load the hash table into the chip (if we are using it). */ 2267 for (i = 0; i < 16; i++) 2268 GEM_BANK1_WRITE_4(sc, 2269 GEM_MAC_HASH0 + i * (GEM_MAC_HASH1 - GEM_MAC_HASH0), 2270 hash[i]); 2271 2272 chipit: 2273 sc->sc_mac_rxcfg = v; 2274 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CONFIG, v | GEM_MAC_RX_ENABLE); 2275 }
Cache object: c1d1023772abc0b2c3a3c65d24a2db72
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