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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/8.4/sys/dev/gem/if_gem.c 225118 2011-08-23 14:37:39Z marius $"); 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_arp.h> 65 #include <net/if_dl.h> 66 #include <net/if_media.h> 67 #include <net/if_types.h> 68 #include <net/if_vlan_var.h> 69 70 #include <netinet/in.h> 71 #include <netinet/in_systm.h> 72 #include <netinet/ip.h> 73 #include <netinet/tcp.h> 74 #include <netinet/udp.h> 75 76 #include <machine/bus.h> 77 78 #include <dev/mii/mii.h> 79 #include <dev/mii/miivar.h> 80 81 #include <dev/gem/if_gemreg.h> 82 #include <dev/gem/if_gemvar.h> 83 84 CTASSERT(powerof2(GEM_NRXDESC) && GEM_NRXDESC >= 32 && GEM_NRXDESC <= 8192); 85 CTASSERT(powerof2(GEM_NTXDESC) && GEM_NTXDESC >= 32 && GEM_NTXDESC <= 8192); 86 87 #define GEM_TRIES 10000 88 89 /* 90 * The hardware supports basic TCP/UDP checksum offloading. However, 91 * the hardware doesn't compensate the checksum for UDP datagram which 92 * can yield to 0x0. As a safe guard, UDP checksum offload is disabled 93 * by default. It can be reactivated by setting special link option 94 * link0 with ifconfig(8). 95 */ 96 #define GEM_CSUM_FEATURES (CSUM_TCP) 97 98 static int gem_add_rxbuf(struct gem_softc *sc, int idx); 99 static int gem_bitwait(struct gem_softc *sc, u_int bank, bus_addr_t r, 100 uint32_t clr, uint32_t set); 101 static void gem_cddma_callback(void *xsc, bus_dma_segment_t *segs, 102 int nsegs, int error); 103 static int gem_disable_rx(struct gem_softc *sc); 104 static int gem_disable_tx(struct gem_softc *sc); 105 static void gem_eint(struct gem_softc *sc, u_int status); 106 static void gem_init(void *xsc); 107 static void gem_init_locked(struct gem_softc *sc); 108 static void gem_init_regs(struct gem_softc *sc); 109 static int gem_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data); 110 static int gem_load_txmbuf(struct gem_softc *sc, struct mbuf **m_head); 111 static int gem_meminit(struct gem_softc *sc); 112 static void gem_mifinit(struct gem_softc *sc); 113 static void gem_reset(struct gem_softc *sc); 114 static int gem_reset_rx(struct gem_softc *sc); 115 static void gem_reset_rxdma(struct gem_softc *sc); 116 static int gem_reset_tx(struct gem_softc *sc); 117 static u_int gem_ringsize(u_int sz); 118 static void gem_rint(struct gem_softc *sc); 119 #ifdef GEM_RINT_TIMEOUT 120 static void gem_rint_timeout(void *arg); 121 #endif 122 static inline void gem_rxcksum(struct mbuf *m, uint64_t flags); 123 static void gem_rxdrain(struct gem_softc *sc); 124 static void gem_setladrf(struct gem_softc *sc); 125 static void gem_start(struct ifnet *ifp); 126 static void gem_start_locked(struct ifnet *ifp); 127 static void gem_stop(struct ifnet *ifp, int disable); 128 static void gem_tick(void *arg); 129 static void gem_tint(struct gem_softc *sc); 130 static inline void gem_txkick(struct gem_softc *sc); 131 static int gem_watchdog(struct gem_softc *sc); 132 133 devclass_t gem_devclass; 134 DRIVER_MODULE(miibus, gem, miibus_driver, miibus_devclass, 0, 0); 135 MODULE_DEPEND(gem, miibus, 1, 1, 1); 136 137 #ifdef GEM_DEBUG 138 #include <sys/ktr.h> 139 #define KTR_GEM KTR_CT2 140 #endif 141 142 #define GEM_BANK1_BITWAIT(sc, r, clr, set) \ 143 gem_bitwait((sc), GEM_RES_BANK1, (r), (clr), (set)) 144 #define GEM_BANK2_BITWAIT(sc, r, clr, set) \ 145 gem_bitwait((sc), GEM_RES_BANK2, (r), (clr), (set)) 146 147 int 148 gem_attach(struct gem_softc *sc) 149 { 150 struct gem_txsoft *txs; 151 struct ifnet *ifp; 152 int error, i, phy; 153 uint32_t v; 154 155 if (bootverbose) 156 device_printf(sc->sc_dev, "flags=0x%x\n", sc->sc_flags); 157 158 /* Set up ifnet structure. */ 159 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 160 if (ifp == NULL) 161 return (ENOSPC); 162 sc->sc_csum_features = GEM_CSUM_FEATURES; 163 ifp->if_softc = sc; 164 if_initname(ifp, device_get_name(sc->sc_dev), 165 device_get_unit(sc->sc_dev)); 166 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 167 ifp->if_start = gem_start; 168 ifp->if_ioctl = gem_ioctl; 169 ifp->if_init = gem_init; 170 IFQ_SET_MAXLEN(&ifp->if_snd, GEM_TXQUEUELEN); 171 ifp->if_snd.ifq_drv_maxlen = GEM_TXQUEUELEN; 172 IFQ_SET_READY(&ifp->if_snd); 173 174 callout_init_mtx(&sc->sc_tick_ch, &sc->sc_mtx, 0); 175 #ifdef GEM_RINT_TIMEOUT 176 callout_init_mtx(&sc->sc_rx_ch, &sc->sc_mtx, 0); 177 #endif 178 179 /* Make sure the chip is stopped. */ 180 gem_reset(sc); 181 182 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0, 183 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, 184 BUS_SPACE_MAXSIZE_32BIT, 0, BUS_SPACE_MAXSIZE_32BIT, 0, NULL, 185 NULL, &sc->sc_pdmatag); 186 if (error != 0) 187 goto fail_ifnet; 188 189 error = bus_dma_tag_create(sc->sc_pdmatag, 1, 0, 190 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 191 1, MCLBYTES, BUS_DMA_ALLOCNOW, NULL, NULL, &sc->sc_rdmatag); 192 if (error != 0) 193 goto fail_ptag; 194 195 error = bus_dma_tag_create(sc->sc_pdmatag, 1, 0, 196 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 197 MCLBYTES * GEM_NTXSEGS, GEM_NTXSEGS, MCLBYTES, 198 BUS_DMA_ALLOCNOW, NULL, NULL, &sc->sc_tdmatag); 199 if (error != 0) 200 goto fail_rtag; 201 202 error = bus_dma_tag_create(sc->sc_pdmatag, PAGE_SIZE, 0, 203 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 204 sizeof(struct gem_control_data), 1, 205 sizeof(struct gem_control_data), 0, 206 NULL, NULL, &sc->sc_cdmatag); 207 if (error != 0) 208 goto fail_ttag; 209 210 /* 211 * Allocate the control data structures, create and load the 212 * DMA map for it. 213 */ 214 if ((error = bus_dmamem_alloc(sc->sc_cdmatag, 215 (void **)&sc->sc_control_data, 216 BUS_DMA_WAITOK | BUS_DMA_COHERENT | BUS_DMA_ZERO, 217 &sc->sc_cddmamap)) != 0) { 218 device_printf(sc->sc_dev, 219 "unable to allocate control data, error = %d\n", error); 220 goto fail_ctag; 221 } 222 223 sc->sc_cddma = 0; 224 if ((error = bus_dmamap_load(sc->sc_cdmatag, sc->sc_cddmamap, 225 sc->sc_control_data, sizeof(struct gem_control_data), 226 gem_cddma_callback, sc, 0)) != 0 || sc->sc_cddma == 0) { 227 device_printf(sc->sc_dev, 228 "unable to load control data DMA map, error = %d\n", 229 error); 230 goto fail_cmem; 231 } 232 233 /* 234 * Initialize the transmit job descriptors. 235 */ 236 STAILQ_INIT(&sc->sc_txfreeq); 237 STAILQ_INIT(&sc->sc_txdirtyq); 238 239 /* 240 * Create the transmit buffer DMA maps. 241 */ 242 error = ENOMEM; 243 for (i = 0; i < GEM_TXQUEUELEN; i++) { 244 txs = &sc->sc_txsoft[i]; 245 txs->txs_mbuf = NULL; 246 txs->txs_ndescs = 0; 247 if ((error = bus_dmamap_create(sc->sc_tdmatag, 0, 248 &txs->txs_dmamap)) != 0) { 249 device_printf(sc->sc_dev, 250 "unable to create TX DMA map %d, error = %d\n", 251 i, error); 252 goto fail_txd; 253 } 254 STAILQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 255 } 256 257 /* 258 * Create the receive buffer DMA maps. 259 */ 260 for (i = 0; i < GEM_NRXDESC; i++) { 261 if ((error = bus_dmamap_create(sc->sc_rdmatag, 0, 262 &sc->sc_rxsoft[i].rxs_dmamap)) != 0) { 263 device_printf(sc->sc_dev, 264 "unable to create RX DMA map %d, error = %d\n", 265 i, error); 266 goto fail_rxd; 267 } 268 sc->sc_rxsoft[i].rxs_mbuf = NULL; 269 } 270 271 /* Bypass probing PHYs if we already know for sure to use a SERDES. */ 272 if ((sc->sc_flags & GEM_SERDES) != 0) 273 goto serdes; 274 275 /* Bad things will happen when touching this register on ERI. */ 276 if (sc->sc_variant != GEM_SUN_ERI) { 277 GEM_BANK1_WRITE_4(sc, GEM_MII_DATAPATH_MODE, 278 GEM_MII_DATAPATH_MII); 279 GEM_BANK1_BARRIER(sc, GEM_MII_DATAPATH_MODE, 4, 280 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 281 } 282 283 gem_mifinit(sc); 284 285 /* 286 * Look for an external PHY. 287 */ 288 error = ENXIO; 289 v = GEM_BANK1_READ_4(sc, GEM_MIF_CONFIG); 290 if ((v & GEM_MIF_CONFIG_MDI1) != 0) { 291 v |= GEM_MIF_CONFIG_PHY_SEL; 292 GEM_BANK1_WRITE_4(sc, GEM_MIF_CONFIG, v); 293 GEM_BANK1_BARRIER(sc, GEM_MIF_CONFIG, 4, 294 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 295 switch (sc->sc_variant) { 296 case GEM_SUN_ERI: 297 phy = GEM_PHYAD_EXTERNAL; 298 break; 299 default: 300 phy = MII_PHY_ANY; 301 break; 302 } 303 error = mii_attach(sc->sc_dev, &sc->sc_miibus, ifp, 304 gem_mediachange, gem_mediastatus, BMSR_DEFCAPMASK, phy, 305 MII_OFFSET_ANY, MIIF_DOPAUSE); 306 } 307 308 /* 309 * Fall back on an internal PHY if no external PHY was found. 310 * Note that with Apple (K2) GMACs GEM_MIF_CONFIG_MDI0 can't be 311 * trusted when the firmware has powered down the chip. 312 */ 313 if (error != 0 && 314 ((v & GEM_MIF_CONFIG_MDI0) != 0 || GEM_IS_APPLE(sc))) { 315 v &= ~GEM_MIF_CONFIG_PHY_SEL; 316 GEM_BANK1_WRITE_4(sc, GEM_MIF_CONFIG, v); 317 GEM_BANK1_BARRIER(sc, GEM_MIF_CONFIG, 4, 318 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 319 switch (sc->sc_variant) { 320 case GEM_SUN_ERI: 321 case GEM_APPLE_K2_GMAC: 322 phy = GEM_PHYAD_INTERNAL; 323 break; 324 case GEM_APPLE_GMAC: 325 phy = GEM_PHYAD_EXTERNAL; 326 break; 327 default: 328 phy = MII_PHY_ANY; 329 break; 330 } 331 error = mii_attach(sc->sc_dev, &sc->sc_miibus, ifp, 332 gem_mediachange, gem_mediastatus, BMSR_DEFCAPMASK, phy, 333 MII_OFFSET_ANY, MIIF_DOPAUSE); 334 } 335 336 /* 337 * Try the external PCS SERDES if we didn't find any PHYs. 338 */ 339 if (error != 0 && sc->sc_variant == GEM_SUN_GEM) { 340 serdes: 341 GEM_BANK1_WRITE_4(sc, GEM_MII_DATAPATH_MODE, 342 GEM_MII_DATAPATH_SERDES); 343 GEM_BANK1_BARRIER(sc, GEM_MII_DATAPATH_MODE, 4, 344 BUS_SPACE_BARRIER_WRITE); 345 GEM_BANK1_WRITE_4(sc, GEM_MII_SLINK_CONTROL, 346 GEM_MII_SLINK_LOOPBACK | GEM_MII_SLINK_EN_SYNC_D); 347 GEM_BANK1_BARRIER(sc, GEM_MII_SLINK_CONTROL, 4, 348 BUS_SPACE_BARRIER_WRITE); 349 GEM_BANK1_WRITE_4(sc, GEM_MII_CONFIG, GEM_MII_CONFIG_ENABLE); 350 GEM_BANK1_BARRIER(sc, GEM_MII_CONFIG, 4, 351 BUS_SPACE_BARRIER_WRITE); 352 sc->sc_flags |= GEM_SERDES; 353 error = mii_attach(sc->sc_dev, &sc->sc_miibus, ifp, 354 gem_mediachange, gem_mediastatus, BMSR_DEFCAPMASK, 355 GEM_PHYAD_EXTERNAL, MII_OFFSET_ANY, MIIF_DOPAUSE); 356 } 357 if (error != 0) { 358 device_printf(sc->sc_dev, "attaching PHYs failed\n"); 359 goto fail_rxd; 360 } 361 sc->sc_mii = device_get_softc(sc->sc_miibus); 362 363 /* 364 * From this point forward, the attachment cannot fail. A failure 365 * before this point releases all resources that may have been 366 * allocated. 367 */ 368 369 /* Get RX FIFO size. */ 370 sc->sc_rxfifosize = 64 * 371 GEM_BANK1_READ_4(sc, GEM_RX_FIFO_SIZE); 372 373 /* Get TX FIFO size. */ 374 v = GEM_BANK1_READ_4(sc, GEM_TX_FIFO_SIZE); 375 device_printf(sc->sc_dev, "%ukB RX FIFO, %ukB TX FIFO\n", 376 sc->sc_rxfifosize / 1024, v / 16); 377 378 /* Attach the interface. */ 379 ether_ifattach(ifp, sc->sc_enaddr); 380 381 /* 382 * Tell the upper layer(s) we support long frames/checksum offloads. 383 */ 384 ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header); 385 ifp->if_capabilities |= IFCAP_VLAN_MTU | IFCAP_HWCSUM; 386 ifp->if_hwassist |= sc->sc_csum_features; 387 ifp->if_capenable |= IFCAP_VLAN_MTU | IFCAP_HWCSUM; 388 389 return (0); 390 391 /* 392 * Free any resources we've allocated during the failed attach 393 * attempt. Do this in reverse order and fall through. 394 */ 395 fail_rxd: 396 for (i = 0; i < GEM_NRXDESC; i++) 397 if (sc->sc_rxsoft[i].rxs_dmamap != NULL) 398 bus_dmamap_destroy(sc->sc_rdmatag, 399 sc->sc_rxsoft[i].rxs_dmamap); 400 fail_txd: 401 for (i = 0; i < GEM_TXQUEUELEN; i++) 402 if (sc->sc_txsoft[i].txs_dmamap != NULL) 403 bus_dmamap_destroy(sc->sc_tdmatag, 404 sc->sc_txsoft[i].txs_dmamap); 405 bus_dmamap_unload(sc->sc_cdmatag, sc->sc_cddmamap); 406 fail_cmem: 407 bus_dmamem_free(sc->sc_cdmatag, sc->sc_control_data, 408 sc->sc_cddmamap); 409 fail_ctag: 410 bus_dma_tag_destroy(sc->sc_cdmatag); 411 fail_ttag: 412 bus_dma_tag_destroy(sc->sc_tdmatag); 413 fail_rtag: 414 bus_dma_tag_destroy(sc->sc_rdmatag); 415 fail_ptag: 416 bus_dma_tag_destroy(sc->sc_pdmatag); 417 fail_ifnet: 418 if_free(ifp); 419 return (error); 420 } 421 422 void 423 gem_detach(struct gem_softc *sc) 424 { 425 struct ifnet *ifp = sc->sc_ifp; 426 int i; 427 428 ether_ifdetach(ifp); 429 GEM_LOCK(sc); 430 gem_stop(ifp, 1); 431 GEM_UNLOCK(sc); 432 callout_drain(&sc->sc_tick_ch); 433 #ifdef GEM_RINT_TIMEOUT 434 callout_drain(&sc->sc_rx_ch); 435 #endif 436 if_free(ifp); 437 device_delete_child(sc->sc_dev, sc->sc_miibus); 438 439 for (i = 0; i < GEM_NRXDESC; i++) 440 if (sc->sc_rxsoft[i].rxs_dmamap != NULL) 441 bus_dmamap_destroy(sc->sc_rdmatag, 442 sc->sc_rxsoft[i].rxs_dmamap); 443 for (i = 0; i < GEM_TXQUEUELEN; i++) 444 if (sc->sc_txsoft[i].txs_dmamap != NULL) 445 bus_dmamap_destroy(sc->sc_tdmatag, 446 sc->sc_txsoft[i].txs_dmamap); 447 GEM_CDSYNC(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 448 bus_dmamap_unload(sc->sc_cdmatag, sc->sc_cddmamap); 449 bus_dmamem_free(sc->sc_cdmatag, sc->sc_control_data, 450 sc->sc_cddmamap); 451 bus_dma_tag_destroy(sc->sc_cdmatag); 452 bus_dma_tag_destroy(sc->sc_tdmatag); 453 bus_dma_tag_destroy(sc->sc_rdmatag); 454 bus_dma_tag_destroy(sc->sc_pdmatag); 455 } 456 457 void 458 gem_suspend(struct gem_softc *sc) 459 { 460 struct ifnet *ifp = sc->sc_ifp; 461 462 GEM_LOCK(sc); 463 gem_stop(ifp, 0); 464 GEM_UNLOCK(sc); 465 } 466 467 void 468 gem_resume(struct gem_softc *sc) 469 { 470 struct ifnet *ifp = sc->sc_ifp; 471 472 GEM_LOCK(sc); 473 /* 474 * On resume all registers have to be initialized again like 475 * after power-on. 476 */ 477 sc->sc_flags &= ~GEM_INITED; 478 if (ifp->if_flags & IFF_UP) 479 gem_init_locked(sc); 480 GEM_UNLOCK(sc); 481 } 482 483 static inline void 484 gem_rxcksum(struct mbuf *m, uint64_t flags) 485 { 486 struct ether_header *eh; 487 struct ip *ip; 488 struct udphdr *uh; 489 uint16_t *opts; 490 int32_t hlen, len, pktlen; 491 uint32_t temp32; 492 uint16_t cksum; 493 494 pktlen = m->m_pkthdr.len; 495 if (pktlen < sizeof(struct ether_header) + sizeof(struct ip)) 496 return; 497 eh = mtod(m, struct ether_header *); 498 if (eh->ether_type != htons(ETHERTYPE_IP)) 499 return; 500 ip = (struct ip *)(eh + 1); 501 if (ip->ip_v != IPVERSION) 502 return; 503 504 hlen = ip->ip_hl << 2; 505 pktlen -= sizeof(struct ether_header); 506 if (hlen < sizeof(struct ip)) 507 return; 508 if (ntohs(ip->ip_len) < hlen) 509 return; 510 if (ntohs(ip->ip_len) != pktlen) 511 return; 512 if (ip->ip_off & htons(IP_MF | IP_OFFMASK)) 513 return; /* Cannot handle fragmented packet. */ 514 515 switch (ip->ip_p) { 516 case IPPROTO_TCP: 517 if (pktlen < (hlen + sizeof(struct tcphdr))) 518 return; 519 break; 520 case IPPROTO_UDP: 521 if (pktlen < (hlen + sizeof(struct udphdr))) 522 return; 523 uh = (struct udphdr *)((uint8_t *)ip + hlen); 524 if (uh->uh_sum == 0) 525 return; /* no checksum */ 526 break; 527 default: 528 return; 529 } 530 531 cksum = ~(flags & GEM_RD_CHECKSUM); 532 /* checksum fixup for IP options */ 533 len = hlen - sizeof(struct ip); 534 if (len > 0) { 535 opts = (uint16_t *)(ip + 1); 536 for (; len > 0; len -= sizeof(uint16_t), opts++) { 537 temp32 = cksum - *opts; 538 temp32 = (temp32 >> 16) + (temp32 & 65535); 539 cksum = temp32 & 65535; 540 } 541 } 542 m->m_pkthdr.csum_flags |= CSUM_DATA_VALID; 543 m->m_pkthdr.csum_data = cksum; 544 } 545 546 static void 547 gem_cddma_callback(void *xsc, bus_dma_segment_t *segs, int nsegs, int error) 548 { 549 struct gem_softc *sc = xsc; 550 551 if (error != 0) 552 return; 553 if (nsegs != 1) 554 panic("%s: bad control buffer segment count", __func__); 555 sc->sc_cddma = segs[0].ds_addr; 556 } 557 558 static void 559 gem_tick(void *arg) 560 { 561 struct gem_softc *sc = arg; 562 struct ifnet *ifp = sc->sc_ifp; 563 uint32_t v; 564 565 GEM_LOCK_ASSERT(sc, MA_OWNED); 566 567 /* 568 * Unload collision and error counters. 569 */ 570 ifp->if_collisions += 571 GEM_BANK1_READ_4(sc, GEM_MAC_NORM_COLL_CNT) + 572 GEM_BANK1_READ_4(sc, GEM_MAC_FIRST_COLL_CNT); 573 v = GEM_BANK1_READ_4(sc, GEM_MAC_EXCESS_COLL_CNT) + 574 GEM_BANK1_READ_4(sc, GEM_MAC_LATE_COLL_CNT); 575 ifp->if_collisions += v; 576 ifp->if_oerrors += v; 577 ifp->if_ierrors += 578 GEM_BANK1_READ_4(sc, GEM_MAC_RX_LEN_ERR_CNT) + 579 GEM_BANK1_READ_4(sc, GEM_MAC_RX_ALIGN_ERR) + 580 GEM_BANK1_READ_4(sc, GEM_MAC_RX_CRC_ERR_CNT) + 581 GEM_BANK1_READ_4(sc, GEM_MAC_RX_CODE_VIOL); 582 583 /* 584 * Then clear the hardware counters. 585 */ 586 GEM_BANK1_WRITE_4(sc, GEM_MAC_NORM_COLL_CNT, 0); 587 GEM_BANK1_WRITE_4(sc, GEM_MAC_FIRST_COLL_CNT, 0); 588 GEM_BANK1_WRITE_4(sc, GEM_MAC_EXCESS_COLL_CNT, 0); 589 GEM_BANK1_WRITE_4(sc, GEM_MAC_LATE_COLL_CNT, 0); 590 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_LEN_ERR_CNT, 0); 591 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_ALIGN_ERR, 0); 592 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CRC_ERR_CNT, 0); 593 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CODE_VIOL, 0); 594 595 mii_tick(sc->sc_mii); 596 597 if (gem_watchdog(sc) == EJUSTRETURN) 598 return; 599 600 callout_reset(&sc->sc_tick_ch, hz, gem_tick, sc); 601 } 602 603 static int 604 gem_bitwait(struct gem_softc *sc, u_int bank, bus_addr_t r, uint32_t clr, 605 uint32_t set) 606 { 607 int i; 608 uint32_t reg; 609 610 for (i = GEM_TRIES; i--; DELAY(100)) { 611 reg = GEM_BANKN_READ_M(bank, 4, sc, r); 612 if ((reg & clr) == 0 && (reg & set) == set) 613 return (1); 614 } 615 return (0); 616 } 617 618 static void 619 gem_reset(struct gem_softc *sc) 620 { 621 622 #ifdef GEM_DEBUG 623 CTR2(KTR_GEM, "%s: %s", device_get_name(sc->sc_dev), __func__); 624 #endif 625 gem_reset_rx(sc); 626 gem_reset_tx(sc); 627 628 /* Do a full reset. */ 629 GEM_BANK2_WRITE_4(sc, GEM_RESET, GEM_RESET_RX | GEM_RESET_TX | 630 (sc->sc_variant == GEM_SUN_ERI ? GEM_ERI_CACHE_LINE_SIZE << 631 GEM_RESET_CLSZ_SHFT : 0)); 632 GEM_BANK2_BARRIER(sc, GEM_RESET, 4, 633 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 634 if (!GEM_BANK2_BITWAIT(sc, GEM_RESET, GEM_RESET_RX | GEM_RESET_TX, 0)) 635 device_printf(sc->sc_dev, "cannot reset device\n"); 636 } 637 638 static void 639 gem_rxdrain(struct gem_softc *sc) 640 { 641 struct gem_rxsoft *rxs; 642 int i; 643 644 for (i = 0; i < GEM_NRXDESC; i++) { 645 rxs = &sc->sc_rxsoft[i]; 646 if (rxs->rxs_mbuf != NULL) { 647 bus_dmamap_sync(sc->sc_rdmatag, rxs->rxs_dmamap, 648 BUS_DMASYNC_POSTREAD); 649 bus_dmamap_unload(sc->sc_rdmatag, rxs->rxs_dmamap); 650 m_freem(rxs->rxs_mbuf); 651 rxs->rxs_mbuf = NULL; 652 } 653 } 654 } 655 656 static void 657 gem_stop(struct ifnet *ifp, int disable) 658 { 659 struct gem_softc *sc = ifp->if_softc; 660 struct gem_txsoft *txs; 661 662 #ifdef GEM_DEBUG 663 CTR2(KTR_GEM, "%s: %s", device_get_name(sc->sc_dev), __func__); 664 #endif 665 666 callout_stop(&sc->sc_tick_ch); 667 #ifdef GEM_RINT_TIMEOUT 668 callout_stop(&sc->sc_rx_ch); 669 #endif 670 671 gem_reset_tx(sc); 672 gem_reset_rx(sc); 673 674 /* 675 * Release any queued transmit buffers. 676 */ 677 while ((txs = STAILQ_FIRST(&sc->sc_txdirtyq)) != NULL) { 678 STAILQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q); 679 if (txs->txs_ndescs != 0) { 680 bus_dmamap_sync(sc->sc_tdmatag, txs->txs_dmamap, 681 BUS_DMASYNC_POSTWRITE); 682 bus_dmamap_unload(sc->sc_tdmatag, txs->txs_dmamap); 683 if (txs->txs_mbuf != NULL) { 684 m_freem(txs->txs_mbuf); 685 txs->txs_mbuf = NULL; 686 } 687 } 688 STAILQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 689 } 690 691 if (disable) 692 gem_rxdrain(sc); 693 694 /* 695 * Mark the interface down and cancel the watchdog timer. 696 */ 697 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 698 sc->sc_flags &= ~GEM_LINK; 699 sc->sc_wdog_timer = 0; 700 } 701 702 static int 703 gem_reset_rx(struct gem_softc *sc) 704 { 705 706 /* 707 * Resetting while DMA is in progress can cause a bus hang, so we 708 * disable DMA first. 709 */ 710 (void)gem_disable_rx(sc); 711 GEM_BANK1_WRITE_4(sc, GEM_RX_CONFIG, 0); 712 GEM_BANK1_BARRIER(sc, GEM_RX_CONFIG, 4, 713 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 714 if (!GEM_BANK1_BITWAIT(sc, GEM_RX_CONFIG, GEM_RX_CONFIG_RXDMA_EN, 0)) 715 device_printf(sc->sc_dev, "cannot disable RX DMA\n"); 716 717 /* Wait 5ms extra. */ 718 DELAY(5000); 719 720 /* Reset the ERX. */ 721 GEM_BANK2_WRITE_4(sc, GEM_RESET, GEM_RESET_RX | 722 (sc->sc_variant == GEM_SUN_ERI ? GEM_ERI_CACHE_LINE_SIZE << 723 GEM_RESET_CLSZ_SHFT : 0)); 724 GEM_BANK2_BARRIER(sc, GEM_RESET, 4, 725 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 726 if (!GEM_BANK2_BITWAIT(sc, GEM_RESET, GEM_RESET_RX, 0)) { 727 device_printf(sc->sc_dev, "cannot reset receiver\n"); 728 return (1); 729 } 730 731 /* Finally, reset RX MAC. */ 732 GEM_BANK1_WRITE_4(sc, GEM_MAC_RXRESET, 1); 733 GEM_BANK1_BARRIER(sc, GEM_MAC_RXRESET, 4, 734 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 735 if (!GEM_BANK1_BITWAIT(sc, GEM_MAC_RXRESET, 1, 0)) { 736 device_printf(sc->sc_dev, "cannot reset RX MAC\n"); 737 return (1); 738 } 739 740 return (0); 741 } 742 743 /* 744 * Reset the receiver DMA engine. 745 * 746 * Intended to be used in case of GEM_INTR_RX_TAG_ERR, GEM_MAC_RX_OVERFLOW 747 * etc in order to reset the receiver DMA engine only and not do a full 748 * reset which amongst others also downs the link and clears the FIFOs. 749 */ 750 static void 751 gem_reset_rxdma(struct gem_softc *sc) 752 { 753 int i; 754 755 if (gem_reset_rx(sc) != 0) { 756 sc->sc_ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 757 return (gem_init_locked(sc)); 758 } 759 for (i = 0; i < GEM_NRXDESC; i++) 760 if (sc->sc_rxsoft[i].rxs_mbuf != NULL) 761 GEM_UPDATE_RXDESC(sc, i); 762 sc->sc_rxptr = 0; 763 GEM_CDSYNC(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 764 765 /* NOTE: we use only 32-bit DMA addresses here. */ 766 GEM_BANK1_WRITE_4(sc, GEM_RX_RING_PTR_HI, 0); 767 GEM_BANK1_WRITE_4(sc, GEM_RX_RING_PTR_LO, GEM_CDRXADDR(sc, 0)); 768 GEM_BANK1_WRITE_4(sc, GEM_RX_KICK, GEM_NRXDESC - 4); 769 GEM_BANK1_WRITE_4(sc, GEM_RX_CONFIG, 770 gem_ringsize(GEM_NRXDESC /* XXX */) | 771 ((ETHER_HDR_LEN + sizeof(struct ip)) << 772 GEM_RX_CONFIG_CXM_START_SHFT) | 773 (GEM_THRSH_1024 << GEM_RX_CONFIG_FIFO_THRS_SHIFT) | 774 (ETHER_ALIGN << GEM_RX_CONFIG_FBOFF_SHFT)); 775 /* Adjusting for the SBus clock probably isn't worth the fuzz. */ 776 GEM_BANK1_WRITE_4(sc, GEM_RX_BLANKING, 777 ((6 * (sc->sc_flags & GEM_PCI66) != 0 ? 2 : 1) << 778 GEM_RX_BLANKING_TIME_SHIFT) | 6); 779 GEM_BANK1_WRITE_4(sc, GEM_RX_PAUSE_THRESH, 780 (3 * sc->sc_rxfifosize / 256) | 781 ((sc->sc_rxfifosize / 256) << 12)); 782 GEM_BANK1_WRITE_4(sc, GEM_RX_CONFIG, 783 GEM_BANK1_READ_4(sc, GEM_RX_CONFIG) | GEM_RX_CONFIG_RXDMA_EN); 784 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_MASK, 785 GEM_MAC_RX_DONE | GEM_MAC_RX_FRAME_CNT); 786 /* 787 * Clear the RX filter and reprogram it. This will also set the 788 * current RX MAC configuration and enable it. 789 */ 790 gem_setladrf(sc); 791 } 792 793 static int 794 gem_reset_tx(struct gem_softc *sc) 795 { 796 797 /* 798 * Resetting while DMA is in progress can cause a bus hang, so we 799 * disable DMA first. 800 */ 801 (void)gem_disable_tx(sc); 802 GEM_BANK1_WRITE_4(sc, GEM_TX_CONFIG, 0); 803 GEM_BANK1_BARRIER(sc, GEM_TX_CONFIG, 4, 804 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 805 if (!GEM_BANK1_BITWAIT(sc, GEM_TX_CONFIG, GEM_TX_CONFIG_TXDMA_EN, 0)) 806 device_printf(sc->sc_dev, "cannot disable TX DMA\n"); 807 808 /* Wait 5ms extra. */ 809 DELAY(5000); 810 811 /* Finally, reset the ETX. */ 812 GEM_BANK2_WRITE_4(sc, GEM_RESET, GEM_RESET_TX | 813 (sc->sc_variant == GEM_SUN_ERI ? GEM_ERI_CACHE_LINE_SIZE << 814 GEM_RESET_CLSZ_SHFT : 0)); 815 GEM_BANK2_BARRIER(sc, GEM_RESET, 4, 816 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 817 if (!GEM_BANK2_BITWAIT(sc, GEM_RESET, GEM_RESET_TX, 0)) { 818 device_printf(sc->sc_dev, "cannot reset transmitter\n"); 819 return (1); 820 } 821 return (0); 822 } 823 824 static int 825 gem_disable_rx(struct gem_softc *sc) 826 { 827 828 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CONFIG, 829 GEM_BANK1_READ_4(sc, GEM_MAC_RX_CONFIG) & ~GEM_MAC_RX_ENABLE); 830 GEM_BANK1_BARRIER(sc, GEM_MAC_RX_CONFIG, 4, 831 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 832 if (GEM_BANK1_BITWAIT(sc, GEM_MAC_RX_CONFIG, GEM_MAC_RX_ENABLE, 0)) 833 return (1); 834 device_printf(sc->sc_dev, "cannot disable RX MAC\n"); 835 return (0); 836 } 837 838 static int 839 gem_disable_tx(struct gem_softc *sc) 840 { 841 842 GEM_BANK1_WRITE_4(sc, GEM_MAC_TX_CONFIG, 843 GEM_BANK1_READ_4(sc, GEM_MAC_TX_CONFIG) & ~GEM_MAC_TX_ENABLE); 844 GEM_BANK1_BARRIER(sc, GEM_MAC_TX_CONFIG, 4, 845 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 846 if (GEM_BANK1_BITWAIT(sc, GEM_MAC_TX_CONFIG, GEM_MAC_TX_ENABLE, 0)) 847 return (1); 848 device_printf(sc->sc_dev, "cannot disable TX MAC\n"); 849 return (0); 850 } 851 852 static int 853 gem_meminit(struct gem_softc *sc) 854 { 855 struct gem_rxsoft *rxs; 856 int error, i; 857 858 GEM_LOCK_ASSERT(sc, MA_OWNED); 859 860 /* 861 * Initialize the transmit descriptor ring. 862 */ 863 for (i = 0; i < GEM_NTXDESC; i++) { 864 sc->sc_txdescs[i].gd_flags = 0; 865 sc->sc_txdescs[i].gd_addr = 0; 866 } 867 sc->sc_txfree = GEM_MAXTXFREE; 868 sc->sc_txnext = 0; 869 sc->sc_txwin = 0; 870 871 /* 872 * Initialize the receive descriptor and receive job 873 * descriptor rings. 874 */ 875 for (i = 0; i < GEM_NRXDESC; i++) { 876 rxs = &sc->sc_rxsoft[i]; 877 if (rxs->rxs_mbuf == NULL) { 878 if ((error = gem_add_rxbuf(sc, i)) != 0) { 879 device_printf(sc->sc_dev, 880 "unable to allocate or map RX buffer %d, " 881 "error = %d\n", i, error); 882 /* 883 * XXX we should attempt to run with fewer 884 * receive buffers instead of just failing. 885 */ 886 gem_rxdrain(sc); 887 return (1); 888 } 889 } else 890 GEM_INIT_RXDESC(sc, i); 891 } 892 sc->sc_rxptr = 0; 893 894 GEM_CDSYNC(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 895 896 return (0); 897 } 898 899 static u_int 900 gem_ringsize(u_int sz) 901 { 902 903 switch (sz) { 904 case 32: 905 return (GEM_RING_SZ_32); 906 case 64: 907 return (GEM_RING_SZ_64); 908 case 128: 909 return (GEM_RING_SZ_128); 910 case 256: 911 return (GEM_RING_SZ_256); 912 case 512: 913 return (GEM_RING_SZ_512); 914 case 1024: 915 return (GEM_RING_SZ_1024); 916 case 2048: 917 return (GEM_RING_SZ_2048); 918 case 4096: 919 return (GEM_RING_SZ_4096); 920 case 8192: 921 return (GEM_RING_SZ_8192); 922 default: 923 printf("%s: invalid ring size %d\n", __func__, sz); 924 return (GEM_RING_SZ_32); 925 } 926 } 927 928 static void 929 gem_init(void *xsc) 930 { 931 struct gem_softc *sc = xsc; 932 933 GEM_LOCK(sc); 934 gem_init_locked(sc); 935 GEM_UNLOCK(sc); 936 } 937 938 /* 939 * Initialization of interface; set up initialization block 940 * and transmit/receive descriptor rings. 941 */ 942 static void 943 gem_init_locked(struct gem_softc *sc) 944 { 945 struct ifnet *ifp = sc->sc_ifp; 946 uint32_t v; 947 948 GEM_LOCK_ASSERT(sc, MA_OWNED); 949 950 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) 951 return; 952 953 #ifdef GEM_DEBUG 954 CTR2(KTR_GEM, "%s: %s: calling stop", device_get_name(sc->sc_dev), 955 __func__); 956 #endif 957 /* 958 * Initialization sequence. The numbered steps below correspond 959 * to the sequence outlined in section 6.3.5.1 in the Ethernet 960 * Channel Engine manual (part of the PCIO manual). 961 * See also the STP2002-STQ document from Sun Microsystems. 962 */ 963 964 /* step 1 & 2. Reset the Ethernet Channel. */ 965 gem_stop(ifp, 0); 966 gem_reset(sc); 967 #ifdef GEM_DEBUG 968 CTR2(KTR_GEM, "%s: %s: restarting", device_get_name(sc->sc_dev), 969 __func__); 970 #endif 971 972 if ((sc->sc_flags & GEM_SERDES) == 0) 973 /* Re-initialize the MIF. */ 974 gem_mifinit(sc); 975 976 /* step 3. Setup data structures in host memory. */ 977 if (gem_meminit(sc) != 0) 978 return; 979 980 /* step 4. TX MAC registers & counters */ 981 gem_init_regs(sc); 982 983 /* step 5. RX MAC registers & counters */ 984 985 /* step 6 & 7. Program Descriptor Ring Base Addresses. */ 986 /* NOTE: we use only 32-bit DMA addresses here. */ 987 GEM_BANK1_WRITE_4(sc, GEM_TX_RING_PTR_HI, 0); 988 GEM_BANK1_WRITE_4(sc, GEM_TX_RING_PTR_LO, GEM_CDTXADDR(sc, 0)); 989 990 GEM_BANK1_WRITE_4(sc, GEM_RX_RING_PTR_HI, 0); 991 GEM_BANK1_WRITE_4(sc, GEM_RX_RING_PTR_LO, GEM_CDRXADDR(sc, 0)); 992 #ifdef GEM_DEBUG 993 CTR3(KTR_GEM, "loading RX ring %lx, TX ring %lx, cddma %lx", 994 GEM_CDRXADDR(sc, 0), GEM_CDTXADDR(sc, 0), sc->sc_cddma); 995 #endif 996 997 /* step 8. Global Configuration & Interrupt Mask */ 998 999 /* 1000 * Set the internal arbitration to "infinite" bursts of the 1001 * maximum length of 31 * 64 bytes so DMA transfers aren't 1002 * split up in cache line size chunks. This greatly improves 1003 * RX performance. 1004 * Enable silicon bug workarounds for the Apple variants. 1005 */ 1006 GEM_BANK1_WRITE_4(sc, GEM_CONFIG, 1007 GEM_CONFIG_TXDMA_LIMIT | GEM_CONFIG_RXDMA_LIMIT | 1008 ((sc->sc_flags & GEM_PCI) != 0 ? GEM_CONFIG_BURST_INF : 1009 GEM_CONFIG_BURST_64) | (GEM_IS_APPLE(sc) ? 1010 GEM_CONFIG_RONPAULBIT | GEM_CONFIG_BUG2FIX : 0)); 1011 1012 GEM_BANK1_WRITE_4(sc, GEM_INTMASK, 1013 ~(GEM_INTR_TX_INTME | GEM_INTR_TX_EMPTY | GEM_INTR_RX_DONE | 1014 GEM_INTR_RX_NOBUF | GEM_INTR_RX_TAG_ERR | GEM_INTR_PERR | 1015 GEM_INTR_BERR 1016 #ifdef GEM_DEBUG 1017 | GEM_INTR_PCS | GEM_INTR_MIF 1018 #endif 1019 )); 1020 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_MASK, 1021 GEM_MAC_RX_DONE | GEM_MAC_RX_FRAME_CNT); 1022 GEM_BANK1_WRITE_4(sc, GEM_MAC_TX_MASK, 1023 GEM_MAC_TX_XMIT_DONE | GEM_MAC_TX_DEFER_EXP | 1024 GEM_MAC_TX_PEAK_EXP); 1025 #ifdef GEM_DEBUG 1026 GEM_BANK1_WRITE_4(sc, GEM_MAC_CONTROL_MASK, 1027 ~(GEM_MAC_PAUSED | GEM_MAC_PAUSE | GEM_MAC_RESUME)); 1028 #else 1029 GEM_BANK1_WRITE_4(sc, GEM_MAC_CONTROL_MASK, 1030 GEM_MAC_PAUSED | GEM_MAC_PAUSE | GEM_MAC_RESUME); 1031 #endif 1032 1033 /* step 9. ETX Configuration: use mostly default values. */ 1034 1035 /* Enable DMA. */ 1036 v = gem_ringsize(GEM_NTXDESC); 1037 /* Set TX FIFO threshold and enable DMA. */ 1038 v |= ((sc->sc_variant == GEM_SUN_ERI ? 0x100 : 0x4ff) << 10) & 1039 GEM_TX_CONFIG_TXFIFO_TH; 1040 GEM_BANK1_WRITE_4(sc, GEM_TX_CONFIG, v | GEM_TX_CONFIG_TXDMA_EN); 1041 1042 /* step 10. ERX Configuration */ 1043 1044 /* Encode Receive Descriptor ring size. */ 1045 v = gem_ringsize(GEM_NRXDESC /* XXX */); 1046 /* RX TCP/UDP checksum offset */ 1047 v |= ((ETHER_HDR_LEN + sizeof(struct ip)) << 1048 GEM_RX_CONFIG_CXM_START_SHFT); 1049 /* Set RX FIFO threshold, set first byte offset and enable DMA. */ 1050 GEM_BANK1_WRITE_4(sc, GEM_RX_CONFIG, 1051 v | (GEM_THRSH_1024 << GEM_RX_CONFIG_FIFO_THRS_SHIFT) | 1052 (ETHER_ALIGN << GEM_RX_CONFIG_FBOFF_SHFT) | 1053 GEM_RX_CONFIG_RXDMA_EN); 1054 1055 /* Adjusting for the SBus clock probably isn't worth the fuzz. */ 1056 GEM_BANK1_WRITE_4(sc, GEM_RX_BLANKING, 1057 ((6 * (sc->sc_flags & GEM_PCI66) != 0 ? 2 : 1) << 1058 GEM_RX_BLANKING_TIME_SHIFT) | 6); 1059 1060 /* 1061 * The following value is for an OFF Threshold of about 3/4 full 1062 * and an ON Threshold of 1/4 full. 1063 */ 1064 GEM_BANK1_WRITE_4(sc, GEM_RX_PAUSE_THRESH, 1065 (3 * sc->sc_rxfifosize / 256) | 1066 ((sc->sc_rxfifosize / 256) << 12)); 1067 1068 /* step 11. Configure Media. */ 1069 1070 /* step 12. RX_MAC Configuration Register */ 1071 v = GEM_BANK1_READ_4(sc, GEM_MAC_RX_CONFIG); 1072 v &= ~GEM_MAC_RX_ENABLE; 1073 v |= GEM_MAC_RX_STRIP_CRC; 1074 sc->sc_mac_rxcfg = v; 1075 /* 1076 * Clear the RX filter and reprogram it. This will also set the 1077 * current RX MAC configuration and enable it. 1078 */ 1079 gem_setladrf(sc); 1080 1081 /* step 13. TX_MAC Configuration Register */ 1082 v = GEM_BANK1_READ_4(sc, GEM_MAC_TX_CONFIG); 1083 v |= GEM_MAC_TX_ENABLE; 1084 (void)gem_disable_tx(sc); 1085 GEM_BANK1_WRITE_4(sc, GEM_MAC_TX_CONFIG, v); 1086 1087 /* step 14. Issue Transmit Pending command. */ 1088 1089 /* step 15. Give the receiver a swift kick. */ 1090 GEM_BANK1_WRITE_4(sc, GEM_RX_KICK, GEM_NRXDESC - 4); 1091 1092 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1093 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1094 1095 mii_mediachg(sc->sc_mii); 1096 1097 /* Start the one second timer. */ 1098 sc->sc_wdog_timer = 0; 1099 callout_reset(&sc->sc_tick_ch, hz, gem_tick, sc); 1100 } 1101 1102 static int 1103 gem_load_txmbuf(struct gem_softc *sc, struct mbuf **m_head) 1104 { 1105 bus_dma_segment_t txsegs[GEM_NTXSEGS]; 1106 struct gem_txsoft *txs; 1107 struct ip *ip; 1108 struct mbuf *m; 1109 uint64_t cflags, flags; 1110 int error, nexttx, nsegs, offset, seg; 1111 1112 GEM_LOCK_ASSERT(sc, MA_OWNED); 1113 1114 /* Get a work queue entry. */ 1115 if ((txs = STAILQ_FIRST(&sc->sc_txfreeq)) == NULL) { 1116 /* Ran out of descriptors. */ 1117 return (ENOBUFS); 1118 } 1119 1120 cflags = 0; 1121 if (((*m_head)->m_pkthdr.csum_flags & sc->sc_csum_features) != 0) { 1122 if (M_WRITABLE(*m_head) == 0) { 1123 m = m_dup(*m_head, M_DONTWAIT); 1124 m_freem(*m_head); 1125 *m_head = m; 1126 if (m == NULL) 1127 return (ENOBUFS); 1128 } 1129 offset = sizeof(struct ether_header); 1130 m = m_pullup(*m_head, offset + sizeof(struct ip)); 1131 if (m == NULL) { 1132 *m_head = NULL; 1133 return (ENOBUFS); 1134 } 1135 ip = (struct ip *)(mtod(m, caddr_t) + offset); 1136 offset += (ip->ip_hl << 2); 1137 cflags = offset << GEM_TD_CXSUM_STARTSHFT | 1138 ((offset + m->m_pkthdr.csum_data) << 1139 GEM_TD_CXSUM_STUFFSHFT) | GEM_TD_CXSUM_ENABLE; 1140 *m_head = m; 1141 } 1142 1143 error = bus_dmamap_load_mbuf_sg(sc->sc_tdmatag, txs->txs_dmamap, 1144 *m_head, txsegs, &nsegs, BUS_DMA_NOWAIT); 1145 if (error == EFBIG) { 1146 m = m_collapse(*m_head, M_DONTWAIT, GEM_NTXSEGS); 1147 if (m == NULL) { 1148 m_freem(*m_head); 1149 *m_head = NULL; 1150 return (ENOBUFS); 1151 } 1152 *m_head = m; 1153 error = bus_dmamap_load_mbuf_sg(sc->sc_tdmatag, 1154 txs->txs_dmamap, *m_head, txsegs, &nsegs, 1155 BUS_DMA_NOWAIT); 1156 if (error != 0) { 1157 m_freem(*m_head); 1158 *m_head = NULL; 1159 return (error); 1160 } 1161 } else if (error != 0) 1162 return (error); 1163 /* If nsegs is wrong then the stack is corrupt. */ 1164 KASSERT(nsegs <= GEM_NTXSEGS, 1165 ("%s: too many DMA segments (%d)", __func__, nsegs)); 1166 if (nsegs == 0) { 1167 m_freem(*m_head); 1168 *m_head = NULL; 1169 return (EIO); 1170 } 1171 1172 /* 1173 * Ensure we have enough descriptors free to describe 1174 * the packet. Note, we always reserve one descriptor 1175 * at the end of the ring as a termination point, in 1176 * order to prevent wrap-around. 1177 */ 1178 if (nsegs > sc->sc_txfree - 1) { 1179 txs->txs_ndescs = 0; 1180 bus_dmamap_unload(sc->sc_tdmatag, txs->txs_dmamap); 1181 return (ENOBUFS); 1182 } 1183 1184 txs->txs_ndescs = nsegs; 1185 txs->txs_firstdesc = sc->sc_txnext; 1186 nexttx = txs->txs_firstdesc; 1187 for (seg = 0; seg < nsegs; seg++, nexttx = GEM_NEXTTX(nexttx)) { 1188 #ifdef GEM_DEBUG 1189 CTR6(KTR_GEM, 1190 "%s: mapping seg %d (txd %d), len %lx, addr %#lx (%#lx)", 1191 __func__, seg, nexttx, txsegs[seg].ds_len, 1192 txsegs[seg].ds_addr, 1193 GEM_DMA_WRITE(sc, txsegs[seg].ds_addr)); 1194 #endif 1195 sc->sc_txdescs[nexttx].gd_addr = 1196 GEM_DMA_WRITE(sc, txsegs[seg].ds_addr); 1197 KASSERT(txsegs[seg].ds_len < GEM_TD_BUFSIZE, 1198 ("%s: segment size too large!", __func__)); 1199 flags = txsegs[seg].ds_len & GEM_TD_BUFSIZE; 1200 sc->sc_txdescs[nexttx].gd_flags = 1201 GEM_DMA_WRITE(sc, flags | cflags); 1202 txs->txs_lastdesc = nexttx; 1203 } 1204 1205 /* Set EOP on the last descriptor. */ 1206 #ifdef GEM_DEBUG 1207 CTR3(KTR_GEM, "%s: end of packet at segment %d, TX %d", 1208 __func__, seg, nexttx); 1209 #endif 1210 sc->sc_txdescs[txs->txs_lastdesc].gd_flags |= 1211 GEM_DMA_WRITE(sc, GEM_TD_END_OF_PACKET); 1212 1213 /* Lastly set SOP on the first descriptor. */ 1214 #ifdef GEM_DEBUG 1215 CTR3(KTR_GEM, "%s: start of packet at segment %d, TX %d", 1216 __func__, seg, nexttx); 1217 #endif 1218 if (++sc->sc_txwin > GEM_NTXSEGS * 2 / 3) { 1219 sc->sc_txwin = 0; 1220 sc->sc_txdescs[txs->txs_firstdesc].gd_flags |= 1221 GEM_DMA_WRITE(sc, GEM_TD_INTERRUPT_ME | 1222 GEM_TD_START_OF_PACKET); 1223 } else 1224 sc->sc_txdescs[txs->txs_firstdesc].gd_flags |= 1225 GEM_DMA_WRITE(sc, GEM_TD_START_OF_PACKET); 1226 1227 /* Sync the DMA map. */ 1228 bus_dmamap_sync(sc->sc_tdmatag, txs->txs_dmamap, 1229 BUS_DMASYNC_PREWRITE); 1230 1231 #ifdef GEM_DEBUG 1232 CTR4(KTR_GEM, "%s: setting firstdesc=%d, lastdesc=%d, ndescs=%d", 1233 __func__, txs->txs_firstdesc, txs->txs_lastdesc, 1234 txs->txs_ndescs); 1235 #endif 1236 STAILQ_REMOVE_HEAD(&sc->sc_txfreeq, txs_q); 1237 STAILQ_INSERT_TAIL(&sc->sc_txdirtyq, txs, txs_q); 1238 txs->txs_mbuf = *m_head; 1239 1240 sc->sc_txnext = GEM_NEXTTX(txs->txs_lastdesc); 1241 sc->sc_txfree -= txs->txs_ndescs; 1242 1243 return (0); 1244 } 1245 1246 static void 1247 gem_init_regs(struct gem_softc *sc) 1248 { 1249 const u_char *laddr = IF_LLADDR(sc->sc_ifp); 1250 1251 GEM_LOCK_ASSERT(sc, MA_OWNED); 1252 1253 /* These registers are not cleared on reset. */ 1254 if ((sc->sc_flags & GEM_INITED) == 0) { 1255 /* magic values */ 1256 GEM_BANK1_WRITE_4(sc, GEM_MAC_IPG0, 0); 1257 GEM_BANK1_WRITE_4(sc, GEM_MAC_IPG1, 8); 1258 GEM_BANK1_WRITE_4(sc, GEM_MAC_IPG2, 4); 1259 1260 /* min frame length */ 1261 GEM_BANK1_WRITE_4(sc, GEM_MAC_MAC_MIN_FRAME, ETHER_MIN_LEN); 1262 /* max frame length and max burst size */ 1263 GEM_BANK1_WRITE_4(sc, GEM_MAC_MAC_MAX_FRAME, 1264 (ETHER_MAX_LEN + ETHER_VLAN_ENCAP_LEN) | (0x2000 << 16)); 1265 1266 /* more magic values */ 1267 GEM_BANK1_WRITE_4(sc, GEM_MAC_PREAMBLE_LEN, 0x7); 1268 GEM_BANK1_WRITE_4(sc, GEM_MAC_JAM_SIZE, 0x4); 1269 GEM_BANK1_WRITE_4(sc, GEM_MAC_ATTEMPT_LIMIT, 0x10); 1270 GEM_BANK1_WRITE_4(sc, GEM_MAC_CONTROL_TYPE, 0x8808); 1271 1272 /* random number seed */ 1273 GEM_BANK1_WRITE_4(sc, GEM_MAC_RANDOM_SEED, 1274 ((laddr[5] << 8) | laddr[4]) & 0x3ff); 1275 1276 /* secondary MAC address: 0:0:0:0:0:0 */ 1277 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR3, 0); 1278 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR4, 0); 1279 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR5, 0); 1280 1281 /* MAC control address: 01:80:c2:00:00:01 */ 1282 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR6, 0x0001); 1283 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR7, 0xc200); 1284 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR8, 0x0180); 1285 1286 /* MAC filter address: 0:0:0:0:0:0 */ 1287 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR_FILTER0, 0); 1288 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR_FILTER1, 0); 1289 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR_FILTER2, 0); 1290 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADR_FLT_MASK1_2, 0); 1291 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADR_FLT_MASK0, 0); 1292 1293 sc->sc_flags |= GEM_INITED; 1294 } 1295 1296 /* Counters need to be zeroed. */ 1297 GEM_BANK1_WRITE_4(sc, GEM_MAC_NORM_COLL_CNT, 0); 1298 GEM_BANK1_WRITE_4(sc, GEM_MAC_FIRST_COLL_CNT, 0); 1299 GEM_BANK1_WRITE_4(sc, GEM_MAC_EXCESS_COLL_CNT, 0); 1300 GEM_BANK1_WRITE_4(sc, GEM_MAC_LATE_COLL_CNT, 0); 1301 GEM_BANK1_WRITE_4(sc, GEM_MAC_DEFER_TMR_CNT, 0); 1302 GEM_BANK1_WRITE_4(sc, GEM_MAC_PEAK_ATTEMPTS, 0); 1303 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_FRAME_COUNT, 0); 1304 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_LEN_ERR_CNT, 0); 1305 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_ALIGN_ERR, 0); 1306 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CRC_ERR_CNT, 0); 1307 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CODE_VIOL, 0); 1308 1309 /* Set XOFF PAUSE time. */ 1310 GEM_BANK1_WRITE_4(sc, GEM_MAC_SEND_PAUSE_CMD, 0x1BF0); 1311 1312 /* Set the station address. */ 1313 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR0, (laddr[4] << 8) | laddr[5]); 1314 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR1, (laddr[2] << 8) | laddr[3]); 1315 GEM_BANK1_WRITE_4(sc, GEM_MAC_ADDR2, (laddr[0] << 8) | laddr[1]); 1316 1317 /* Enable MII outputs. */ 1318 GEM_BANK1_WRITE_4(sc, GEM_MAC_XIF_CONFIG, GEM_MAC_XIF_TX_MII_ENA); 1319 } 1320 1321 static void 1322 gem_start(struct ifnet *ifp) 1323 { 1324 struct gem_softc *sc = ifp->if_softc; 1325 1326 GEM_LOCK(sc); 1327 gem_start_locked(ifp); 1328 GEM_UNLOCK(sc); 1329 } 1330 1331 static inline void 1332 gem_txkick(struct gem_softc *sc) 1333 { 1334 1335 /* 1336 * Update the TX kick register. This register has to point to the 1337 * descriptor after the last valid one and for optimum performance 1338 * should be incremented in multiples of 4 (the DMA engine fetches/ 1339 * updates descriptors in batches of 4). 1340 */ 1341 #ifdef GEM_DEBUG 1342 CTR3(KTR_GEM, "%s: %s: kicking TX %d", 1343 device_get_name(sc->sc_dev), __func__, sc->sc_txnext); 1344 #endif 1345 GEM_CDSYNC(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1346 GEM_BANK1_WRITE_4(sc, GEM_TX_KICK, sc->sc_txnext); 1347 } 1348 1349 static void 1350 gem_start_locked(struct ifnet *ifp) 1351 { 1352 struct gem_softc *sc = ifp->if_softc; 1353 struct mbuf *m; 1354 int kicked, ntx; 1355 1356 GEM_LOCK_ASSERT(sc, MA_OWNED); 1357 1358 if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) != 1359 IFF_DRV_RUNNING || (sc->sc_flags & GEM_LINK) == 0) 1360 return; 1361 1362 #ifdef GEM_DEBUG 1363 CTR4(KTR_GEM, "%s: %s: txfree %d, txnext %d", 1364 device_get_name(sc->sc_dev), __func__, sc->sc_txfree, 1365 sc->sc_txnext); 1366 #endif 1367 ntx = 0; 1368 kicked = 0; 1369 for (; !IFQ_DRV_IS_EMPTY(&ifp->if_snd) && sc->sc_txfree > 1;) { 1370 IFQ_DRV_DEQUEUE(&ifp->if_snd, m); 1371 if (m == NULL) 1372 break; 1373 if (gem_load_txmbuf(sc, &m) != 0) { 1374 if (m == NULL) 1375 break; 1376 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 1377 IFQ_DRV_PREPEND(&ifp->if_snd, m); 1378 break; 1379 } 1380 if ((sc->sc_txnext % 4) == 0) { 1381 gem_txkick(sc); 1382 kicked = 1; 1383 } else 1384 kicked = 0; 1385 ntx++; 1386 BPF_MTAP(ifp, m); 1387 } 1388 1389 if (ntx > 0) { 1390 if (kicked == 0) 1391 gem_txkick(sc); 1392 #ifdef GEM_DEBUG 1393 CTR2(KTR_GEM, "%s: packets enqueued, OWN on %d", 1394 device_get_name(sc->sc_dev), sc->sc_txnext); 1395 #endif 1396 1397 /* Set a watchdog timer in case the chip flakes out. */ 1398 sc->sc_wdog_timer = 5; 1399 #ifdef GEM_DEBUG 1400 CTR3(KTR_GEM, "%s: %s: watchdog %d", 1401 device_get_name(sc->sc_dev), __func__, 1402 sc->sc_wdog_timer); 1403 #endif 1404 } 1405 } 1406 1407 static void 1408 gem_tint(struct gem_softc *sc) 1409 { 1410 struct ifnet *ifp = sc->sc_ifp; 1411 struct gem_txsoft *txs; 1412 int progress; 1413 uint32_t txlast; 1414 #ifdef GEM_DEBUG 1415 int i; 1416 1417 GEM_LOCK_ASSERT(sc, MA_OWNED); 1418 1419 CTR2(KTR_GEM, "%s: %s", device_get_name(sc->sc_dev), __func__); 1420 #endif 1421 1422 /* 1423 * Go through our TX list and free mbufs for those 1424 * frames that have been transmitted. 1425 */ 1426 progress = 0; 1427 GEM_CDSYNC(sc, BUS_DMASYNC_POSTREAD); 1428 while ((txs = STAILQ_FIRST(&sc->sc_txdirtyq)) != NULL) { 1429 #ifdef GEM_DEBUG 1430 if ((ifp->if_flags & IFF_DEBUG) != 0) { 1431 printf(" txsoft %p transmit chain:\n", txs); 1432 for (i = txs->txs_firstdesc;; i = GEM_NEXTTX(i)) { 1433 printf("descriptor %d: ", i); 1434 printf("gd_flags: 0x%016llx\t", 1435 (long long)GEM_DMA_READ(sc, 1436 sc->sc_txdescs[i].gd_flags)); 1437 printf("gd_addr: 0x%016llx\n", 1438 (long long)GEM_DMA_READ(sc, 1439 sc->sc_txdescs[i].gd_addr)); 1440 if (i == txs->txs_lastdesc) 1441 break; 1442 } 1443 } 1444 #endif 1445 1446 /* 1447 * In theory, we could harvest some descriptors before 1448 * the ring is empty, but that's a bit complicated. 1449 * 1450 * GEM_TX_COMPLETION points to the last descriptor 1451 * processed + 1. 1452 */ 1453 txlast = GEM_BANK1_READ_4(sc, GEM_TX_COMPLETION); 1454 #ifdef GEM_DEBUG 1455 CTR4(KTR_GEM, "%s: txs->txs_firstdesc = %d, " 1456 "txs->txs_lastdesc = %d, txlast = %d", 1457 __func__, txs->txs_firstdesc, txs->txs_lastdesc, txlast); 1458 #endif 1459 if (txs->txs_firstdesc <= txs->txs_lastdesc) { 1460 if ((txlast >= txs->txs_firstdesc) && 1461 (txlast <= txs->txs_lastdesc)) 1462 break; 1463 } else { 1464 /* Ick -- this command wraps. */ 1465 if ((txlast >= txs->txs_firstdesc) || 1466 (txlast <= txs->txs_lastdesc)) 1467 break; 1468 } 1469 1470 #ifdef GEM_DEBUG 1471 CTR1(KTR_GEM, "%s: releasing a descriptor", __func__); 1472 #endif 1473 STAILQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q); 1474 1475 sc->sc_txfree += txs->txs_ndescs; 1476 1477 bus_dmamap_sync(sc->sc_tdmatag, txs->txs_dmamap, 1478 BUS_DMASYNC_POSTWRITE); 1479 bus_dmamap_unload(sc->sc_tdmatag, txs->txs_dmamap); 1480 if (txs->txs_mbuf != NULL) { 1481 m_freem(txs->txs_mbuf); 1482 txs->txs_mbuf = NULL; 1483 } 1484 1485 STAILQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 1486 1487 ifp->if_opackets++; 1488 progress = 1; 1489 } 1490 1491 #ifdef GEM_DEBUG 1492 CTR4(KTR_GEM, "%s: GEM_TX_STATE_MACHINE %x GEM_TX_DATA_PTR %llx " 1493 "GEM_TX_COMPLETION %x", 1494 __func__, GEM_BANK1_READ_4(sc, GEM_TX_STATE_MACHINE), 1495 ((long long)GEM_BANK1_READ_4(sc, GEM_TX_DATA_PTR_HI) << 32) | 1496 GEM_BANK1_READ_4(sc, GEM_TX_DATA_PTR_LO), 1497 GEM_BANK1_READ_4(sc, GEM_TX_COMPLETION)); 1498 #endif 1499 1500 if (progress) { 1501 if (sc->sc_txfree == GEM_NTXDESC - 1) 1502 sc->sc_txwin = 0; 1503 1504 /* 1505 * We freed some descriptors, so reset IFF_DRV_OACTIVE 1506 * and restart. 1507 */ 1508 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1509 if (STAILQ_EMPTY(&sc->sc_txdirtyq)) 1510 sc->sc_wdog_timer = 0; 1511 gem_start_locked(ifp); 1512 } 1513 1514 #ifdef GEM_DEBUG 1515 CTR3(KTR_GEM, "%s: %s: watchdog %d", 1516 device_get_name(sc->sc_dev), __func__, sc->sc_wdog_timer); 1517 #endif 1518 } 1519 1520 #ifdef GEM_RINT_TIMEOUT 1521 static void 1522 gem_rint_timeout(void *arg) 1523 { 1524 struct gem_softc *sc = arg; 1525 1526 GEM_LOCK_ASSERT(sc, MA_OWNED); 1527 1528 gem_rint(sc); 1529 } 1530 #endif 1531 1532 static void 1533 gem_rint(struct gem_softc *sc) 1534 { 1535 struct ifnet *ifp = sc->sc_ifp; 1536 struct mbuf *m; 1537 uint64_t rxstat; 1538 uint32_t rxcomp; 1539 1540 GEM_LOCK_ASSERT(sc, MA_OWNED); 1541 1542 #ifdef GEM_RINT_TIMEOUT 1543 callout_stop(&sc->sc_rx_ch); 1544 #endif 1545 #ifdef GEM_DEBUG 1546 CTR2(KTR_GEM, "%s: %s", device_get_name(sc->sc_dev), __func__); 1547 #endif 1548 1549 /* 1550 * Read the completion register once. This limits 1551 * how long the following loop can execute. 1552 */ 1553 rxcomp = GEM_BANK1_READ_4(sc, GEM_RX_COMPLETION); 1554 #ifdef GEM_DEBUG 1555 CTR3(KTR_GEM, "%s: sc->sc_rxptr %d, complete %d", 1556 __func__, sc->sc_rxptr, rxcomp); 1557 #endif 1558 GEM_CDSYNC(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1559 for (; sc->sc_rxptr != rxcomp;) { 1560 m = sc->sc_rxsoft[sc->sc_rxptr].rxs_mbuf; 1561 rxstat = GEM_DMA_READ(sc, 1562 sc->sc_rxdescs[sc->sc_rxptr].gd_flags); 1563 1564 if (rxstat & GEM_RD_OWN) { 1565 #ifdef GEM_RINT_TIMEOUT 1566 /* 1567 * The descriptor is still marked as owned, although 1568 * it is supposed to have completed. This has been 1569 * observed on some machines. Just exiting here 1570 * might leave the packet sitting around until another 1571 * one arrives to trigger a new interrupt, which is 1572 * generally undesirable, so set up a timeout. 1573 */ 1574 callout_reset(&sc->sc_rx_ch, GEM_RXOWN_TICKS, 1575 gem_rint_timeout, sc); 1576 #endif 1577 m = NULL; 1578 goto kickit; 1579 } 1580 1581 if (rxstat & GEM_RD_BAD_CRC) { 1582 ifp->if_ierrors++; 1583 device_printf(sc->sc_dev, "receive error: CRC error\n"); 1584 GEM_INIT_RXDESC(sc, sc->sc_rxptr); 1585 m = NULL; 1586 goto kickit; 1587 } 1588 1589 #ifdef GEM_DEBUG 1590 if ((ifp->if_flags & IFF_DEBUG) != 0) { 1591 printf(" rxsoft %p descriptor %d: ", 1592 &sc->sc_rxsoft[sc->sc_rxptr], sc->sc_rxptr); 1593 printf("gd_flags: 0x%016llx\t", 1594 (long long)GEM_DMA_READ(sc, 1595 sc->sc_rxdescs[sc->sc_rxptr].gd_flags)); 1596 printf("gd_addr: 0x%016llx\n", 1597 (long long)GEM_DMA_READ(sc, 1598 sc->sc_rxdescs[sc->sc_rxptr].gd_addr)); 1599 } 1600 #endif 1601 1602 /* 1603 * Allocate a new mbuf cluster. If that fails, we are 1604 * out of memory, and must drop the packet and recycle 1605 * the buffer that's already attached to this descriptor. 1606 */ 1607 if (gem_add_rxbuf(sc, sc->sc_rxptr) != 0) { 1608 ifp->if_iqdrops++; 1609 GEM_INIT_RXDESC(sc, sc->sc_rxptr); 1610 m = NULL; 1611 } 1612 1613 kickit: 1614 /* 1615 * Update the RX kick register. This register has to point 1616 * to the descriptor after the last valid one (before the 1617 * current batch) and for optimum performance should be 1618 * incremented in multiples of 4 (the DMA engine fetches/ 1619 * updates descriptors in batches of 4). 1620 */ 1621 sc->sc_rxptr = GEM_NEXTRX(sc->sc_rxptr); 1622 if ((sc->sc_rxptr % 4) == 0) { 1623 GEM_CDSYNC(sc, 1624 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1625 GEM_BANK1_WRITE_4(sc, GEM_RX_KICK, 1626 (sc->sc_rxptr + GEM_NRXDESC - 4) & 1627 GEM_NRXDESC_MASK); 1628 } 1629 1630 if (m == NULL) { 1631 if (rxstat & GEM_RD_OWN) 1632 break; 1633 continue; 1634 } 1635 1636 ifp->if_ipackets++; 1637 m->m_data += ETHER_ALIGN; /* first byte offset */ 1638 m->m_pkthdr.rcvif = ifp; 1639 m->m_pkthdr.len = m->m_len = GEM_RD_BUFLEN(rxstat); 1640 1641 if ((ifp->if_capenable & IFCAP_RXCSUM) != 0) 1642 gem_rxcksum(m, rxstat); 1643 1644 /* Pass it on. */ 1645 GEM_UNLOCK(sc); 1646 (*ifp->if_input)(ifp, m); 1647 GEM_LOCK(sc); 1648 } 1649 1650 #ifdef GEM_DEBUG 1651 CTR3(KTR_GEM, "%s: done sc->sc_rxptr %d, complete %d", __func__, 1652 sc->sc_rxptr, GEM_BANK1_READ_4(sc, GEM_RX_COMPLETION)); 1653 #endif 1654 } 1655 1656 static int 1657 gem_add_rxbuf(struct gem_softc *sc, int idx) 1658 { 1659 struct gem_rxsoft *rxs = &sc->sc_rxsoft[idx]; 1660 struct mbuf *m; 1661 bus_dma_segment_t segs[1]; 1662 int error, nsegs; 1663 1664 GEM_LOCK_ASSERT(sc, MA_OWNED); 1665 1666 m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 1667 if (m == NULL) 1668 return (ENOBUFS); 1669 m->m_len = m->m_pkthdr.len = m->m_ext.ext_size; 1670 1671 #ifdef GEM_DEBUG 1672 /* Bzero the packet to check DMA. */ 1673 memset(m->m_ext.ext_buf, 0, m->m_ext.ext_size); 1674 #endif 1675 1676 if (rxs->rxs_mbuf != NULL) { 1677 bus_dmamap_sync(sc->sc_rdmatag, rxs->rxs_dmamap, 1678 BUS_DMASYNC_POSTREAD); 1679 bus_dmamap_unload(sc->sc_rdmatag, rxs->rxs_dmamap); 1680 } 1681 1682 error = bus_dmamap_load_mbuf_sg(sc->sc_rdmatag, rxs->rxs_dmamap, 1683 m, segs, &nsegs, BUS_DMA_NOWAIT); 1684 if (error != 0) { 1685 device_printf(sc->sc_dev, 1686 "cannot load RS DMA map %d, error = %d\n", idx, error); 1687 m_freem(m); 1688 return (error); 1689 } 1690 /* If nsegs is wrong then the stack is corrupt. */ 1691 KASSERT(nsegs == 1, 1692 ("%s: too many DMA segments (%d)", __func__, nsegs)); 1693 rxs->rxs_mbuf = m; 1694 rxs->rxs_paddr = segs[0].ds_addr; 1695 1696 bus_dmamap_sync(sc->sc_rdmatag, rxs->rxs_dmamap, 1697 BUS_DMASYNC_PREREAD); 1698 1699 GEM_INIT_RXDESC(sc, idx); 1700 1701 return (0); 1702 } 1703 1704 static void 1705 gem_eint(struct gem_softc *sc, u_int status) 1706 { 1707 1708 sc->sc_ifp->if_ierrors++; 1709 if ((status & GEM_INTR_RX_TAG_ERR) != 0) { 1710 gem_reset_rxdma(sc); 1711 return; 1712 } 1713 1714 device_printf(sc->sc_dev, "%s: status 0x%x", __func__, status); 1715 if ((status & GEM_INTR_BERR) != 0) { 1716 if ((sc->sc_flags & GEM_PCI) != 0) 1717 printf(", PCI bus error 0x%x\n", 1718 GEM_BANK1_READ_4(sc, GEM_PCI_ERROR_STATUS)); 1719 else 1720 printf(", SBus error 0x%x\n", 1721 GEM_BANK1_READ_4(sc, GEM_SBUS_STATUS)); 1722 } 1723 } 1724 1725 void 1726 gem_intr(void *v) 1727 { 1728 struct gem_softc *sc = v; 1729 uint32_t status, status2; 1730 1731 GEM_LOCK(sc); 1732 status = GEM_BANK1_READ_4(sc, GEM_STATUS); 1733 1734 #ifdef GEM_DEBUG 1735 CTR4(KTR_GEM, "%s: %s: cplt %x, status %x", 1736 device_get_name(sc->sc_dev), __func__, 1737 (status >> GEM_STATUS_TX_COMPLETION_SHFT), (u_int)status); 1738 1739 /* 1740 * PCS interrupts must be cleared, otherwise no traffic is passed! 1741 */ 1742 if ((status & GEM_INTR_PCS) != 0) { 1743 status2 = 1744 GEM_BANK1_READ_4(sc, GEM_MII_INTERRUP_STATUS) | 1745 GEM_BANK1_READ_4(sc, GEM_MII_INTERRUP_STATUS); 1746 if ((status2 & GEM_MII_INTERRUP_LINK) != 0) 1747 device_printf(sc->sc_dev, 1748 "%s: PCS link status changed\n", __func__); 1749 } 1750 if ((status & GEM_MAC_CONTROL_STATUS) != 0) { 1751 status2 = GEM_BANK1_READ_4(sc, GEM_MAC_CONTROL_STATUS); 1752 if ((status2 & GEM_MAC_PAUSED) != 0) 1753 device_printf(sc->sc_dev, 1754 "%s: PAUSE received (PAUSE time %d slots)\n", 1755 __func__, GEM_MAC_PAUSE_TIME(status2)); 1756 if ((status2 & GEM_MAC_PAUSE) != 0) 1757 device_printf(sc->sc_dev, 1758 "%s: transited to PAUSE state\n", __func__); 1759 if ((status2 & GEM_MAC_RESUME) != 0) 1760 device_printf(sc->sc_dev, 1761 "%s: transited to non-PAUSE state\n", __func__); 1762 } 1763 if ((status & GEM_INTR_MIF) != 0) 1764 device_printf(sc->sc_dev, "%s: MIF interrupt\n", __func__); 1765 #endif 1766 1767 if (__predict_false(status & 1768 (GEM_INTR_RX_TAG_ERR | GEM_INTR_PERR | GEM_INTR_BERR)) != 0) 1769 gem_eint(sc, status); 1770 1771 if ((status & (GEM_INTR_RX_DONE | GEM_INTR_RX_NOBUF)) != 0) 1772 gem_rint(sc); 1773 1774 if ((status & (GEM_INTR_TX_EMPTY | GEM_INTR_TX_INTME)) != 0) 1775 gem_tint(sc); 1776 1777 if (__predict_false((status & GEM_INTR_TX_MAC) != 0)) { 1778 status2 = GEM_BANK1_READ_4(sc, GEM_MAC_TX_STATUS); 1779 if ((status2 & 1780 ~(GEM_MAC_TX_XMIT_DONE | GEM_MAC_TX_DEFER_EXP | 1781 GEM_MAC_TX_PEAK_EXP)) != 0) 1782 device_printf(sc->sc_dev, 1783 "MAC TX fault, status %x\n", status2); 1784 if ((status2 & 1785 (GEM_MAC_TX_UNDERRUN | GEM_MAC_TX_PKT_TOO_LONG)) != 0) { 1786 sc->sc_ifp->if_oerrors++; 1787 sc->sc_ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1788 gem_init_locked(sc); 1789 } 1790 } 1791 if (__predict_false((status & GEM_INTR_RX_MAC) != 0)) { 1792 status2 = GEM_BANK1_READ_4(sc, GEM_MAC_RX_STATUS); 1793 /* 1794 * At least with GEM_SUN_GEM and some GEM_SUN_ERI 1795 * revisions GEM_MAC_RX_OVERFLOW happen often due to a 1796 * silicon bug so handle them silently. Moreover, it's 1797 * likely that the receiver has hung so we reset it. 1798 */ 1799 if ((status2 & GEM_MAC_RX_OVERFLOW) != 0) { 1800 sc->sc_ifp->if_ierrors++; 1801 gem_reset_rxdma(sc); 1802 } else if ((status2 & 1803 ~(GEM_MAC_RX_DONE | GEM_MAC_RX_FRAME_CNT)) != 0) 1804 device_printf(sc->sc_dev, 1805 "MAC RX fault, status %x\n", status2); 1806 } 1807 GEM_UNLOCK(sc); 1808 } 1809 1810 static int 1811 gem_watchdog(struct gem_softc *sc) 1812 { 1813 struct ifnet *ifp = sc->sc_ifp; 1814 1815 GEM_LOCK_ASSERT(sc, MA_OWNED); 1816 1817 #ifdef GEM_DEBUG 1818 CTR4(KTR_GEM, 1819 "%s: GEM_RX_CONFIG %x GEM_MAC_RX_STATUS %x GEM_MAC_RX_CONFIG %x", 1820 __func__, GEM_BANK1_READ_4(sc, GEM_RX_CONFIG), 1821 GEM_BANK1_READ_4(sc, GEM_MAC_RX_STATUS), 1822 GEM_BANK1_READ_4(sc, GEM_MAC_RX_CONFIG)); 1823 CTR4(KTR_GEM, 1824 "%s: GEM_TX_CONFIG %x GEM_MAC_TX_STATUS %x GEM_MAC_TX_CONFIG %x", 1825 __func__, GEM_BANK1_READ_4(sc, GEM_TX_CONFIG), 1826 GEM_BANK1_READ_4(sc, GEM_MAC_TX_STATUS), 1827 GEM_BANK1_READ_4(sc, GEM_MAC_TX_CONFIG)); 1828 #endif 1829 1830 if (sc->sc_wdog_timer == 0 || --sc->sc_wdog_timer != 0) 1831 return (0); 1832 1833 if ((sc->sc_flags & GEM_LINK) != 0) 1834 device_printf(sc->sc_dev, "device timeout\n"); 1835 else if (bootverbose) 1836 device_printf(sc->sc_dev, "device timeout (no link)\n"); 1837 ++ifp->if_oerrors; 1838 1839 /* Try to get more packets going. */ 1840 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1841 gem_init_locked(sc); 1842 gem_start_locked(ifp); 1843 return (EJUSTRETURN); 1844 } 1845 1846 static void 1847 gem_mifinit(struct gem_softc *sc) 1848 { 1849 1850 /* Configure the MIF in frame mode. */ 1851 GEM_BANK1_WRITE_4(sc, GEM_MIF_CONFIG, 1852 GEM_BANK1_READ_4(sc, GEM_MIF_CONFIG) & ~GEM_MIF_CONFIG_BB_ENA); 1853 GEM_BANK1_BARRIER(sc, GEM_MIF_CONFIG, 4, 1854 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 1855 } 1856 1857 /* 1858 * MII interface 1859 * 1860 * The MII interface supports at least three different operating modes: 1861 * 1862 * Bitbang mode is implemented using data, clock and output enable registers. 1863 * 1864 * Frame mode is implemented by loading a complete frame into the frame 1865 * register and polling the valid bit for completion. 1866 * 1867 * Polling mode uses the frame register but completion is indicated by 1868 * an interrupt. 1869 * 1870 */ 1871 int 1872 gem_mii_readreg(device_t dev, int phy, int reg) 1873 { 1874 struct gem_softc *sc; 1875 int n; 1876 uint32_t v; 1877 1878 #ifdef GEM_DEBUG_PHY 1879 printf("%s: phy %d reg %d\n", __func__, phy, reg); 1880 #endif 1881 1882 sc = device_get_softc(dev); 1883 if ((sc->sc_flags & GEM_SERDES) != 0) { 1884 switch (reg) { 1885 case MII_BMCR: 1886 reg = GEM_MII_CONTROL; 1887 break; 1888 case MII_BMSR: 1889 reg = GEM_MII_STATUS; 1890 break; 1891 case MII_PHYIDR1: 1892 case MII_PHYIDR2: 1893 return (0); 1894 case MII_ANAR: 1895 reg = GEM_MII_ANAR; 1896 break; 1897 case MII_ANLPAR: 1898 reg = GEM_MII_ANLPAR; 1899 break; 1900 case MII_EXTSR: 1901 return (EXTSR_1000XFDX | EXTSR_1000XHDX); 1902 default: 1903 device_printf(sc->sc_dev, 1904 "%s: unhandled register %d\n", __func__, reg); 1905 return (0); 1906 } 1907 return (GEM_BANK1_READ_4(sc, reg)); 1908 } 1909 1910 /* Construct the frame command. */ 1911 v = GEM_MIF_FRAME_READ | 1912 (phy << GEM_MIF_PHY_SHIFT) | 1913 (reg << GEM_MIF_REG_SHIFT); 1914 1915 GEM_BANK1_WRITE_4(sc, GEM_MIF_FRAME, v); 1916 GEM_BANK1_BARRIER(sc, GEM_MIF_FRAME, 4, 1917 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 1918 for (n = 0; n < 100; n++) { 1919 DELAY(1); 1920 v = GEM_BANK1_READ_4(sc, GEM_MIF_FRAME); 1921 if (v & GEM_MIF_FRAME_TA0) 1922 return (v & GEM_MIF_FRAME_DATA); 1923 } 1924 1925 device_printf(sc->sc_dev, "%s: timed out\n", __func__); 1926 return (0); 1927 } 1928 1929 int 1930 gem_mii_writereg(device_t dev, int phy, int reg, int val) 1931 { 1932 struct gem_softc *sc; 1933 int n; 1934 uint32_t v; 1935 1936 #ifdef GEM_DEBUG_PHY 1937 printf("%s: phy %d reg %d val %x\n", phy, reg, val, __func__); 1938 #endif 1939 1940 sc = device_get_softc(dev); 1941 if ((sc->sc_flags & GEM_SERDES) != 0) { 1942 switch (reg) { 1943 case MII_BMSR: 1944 reg = GEM_MII_STATUS; 1945 break; 1946 case MII_BMCR: 1947 reg = GEM_MII_CONTROL; 1948 if ((val & GEM_MII_CONTROL_RESET) == 0) 1949 break; 1950 GEM_BANK1_WRITE_4(sc, GEM_MII_CONTROL, val); 1951 GEM_BANK1_BARRIER(sc, GEM_MII_CONTROL, 4, 1952 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 1953 if (!GEM_BANK1_BITWAIT(sc, GEM_MII_CONTROL, 1954 GEM_MII_CONTROL_RESET, 0)) 1955 device_printf(sc->sc_dev, 1956 "cannot reset PCS\n"); 1957 /* FALLTHROUGH */ 1958 case MII_ANAR: 1959 GEM_BANK1_WRITE_4(sc, GEM_MII_CONFIG, 0); 1960 GEM_BANK1_BARRIER(sc, GEM_MII_CONFIG, 4, 1961 BUS_SPACE_BARRIER_WRITE); 1962 GEM_BANK1_WRITE_4(sc, GEM_MII_ANAR, val); 1963 GEM_BANK1_BARRIER(sc, GEM_MII_ANAR, 4, 1964 BUS_SPACE_BARRIER_WRITE); 1965 GEM_BANK1_WRITE_4(sc, GEM_MII_SLINK_CONTROL, 1966 GEM_MII_SLINK_LOOPBACK | GEM_MII_SLINK_EN_SYNC_D); 1967 GEM_BANK1_BARRIER(sc, GEM_MII_SLINK_CONTROL, 4, 1968 BUS_SPACE_BARRIER_WRITE); 1969 GEM_BANK1_WRITE_4(sc, GEM_MII_CONFIG, 1970 GEM_MII_CONFIG_ENABLE); 1971 GEM_BANK1_BARRIER(sc, GEM_MII_CONFIG, 4, 1972 BUS_SPACE_BARRIER_WRITE); 1973 return (0); 1974 case MII_ANLPAR: 1975 reg = GEM_MII_ANLPAR; 1976 break; 1977 default: 1978 device_printf(sc->sc_dev, 1979 "%s: unhandled register %d\n", __func__, reg); 1980 return (0); 1981 } 1982 GEM_BANK1_WRITE_4(sc, reg, val); 1983 GEM_BANK1_BARRIER(sc, reg, 4, 1984 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 1985 return (0); 1986 } 1987 1988 /* Construct the frame command. */ 1989 v = GEM_MIF_FRAME_WRITE | 1990 (phy << GEM_MIF_PHY_SHIFT) | 1991 (reg << GEM_MIF_REG_SHIFT) | 1992 (val & GEM_MIF_FRAME_DATA); 1993 1994 GEM_BANK1_WRITE_4(sc, GEM_MIF_FRAME, v); 1995 GEM_BANK1_BARRIER(sc, GEM_MIF_FRAME, 4, 1996 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 1997 for (n = 0; n < 100; n++) { 1998 DELAY(1); 1999 v = GEM_BANK1_READ_4(sc, GEM_MIF_FRAME); 2000 if (v & GEM_MIF_FRAME_TA0) 2001 return (1); 2002 } 2003 2004 device_printf(sc->sc_dev, "%s: timed out\n", __func__); 2005 return (0); 2006 } 2007 2008 void 2009 gem_mii_statchg(device_t dev) 2010 { 2011 struct gem_softc *sc; 2012 int gigabit; 2013 uint32_t rxcfg, txcfg, v; 2014 2015 sc = device_get_softc(dev); 2016 2017 GEM_LOCK_ASSERT(sc, MA_OWNED); 2018 2019 #ifdef GEM_DEBUG 2020 if ((sc->sc_ifp->if_flags & IFF_DEBUG) != 0) 2021 device_printf(sc->sc_dev, "%s: status change\n", __func__); 2022 #endif 2023 2024 if ((sc->sc_mii->mii_media_status & IFM_ACTIVE) != 0 && 2025 IFM_SUBTYPE(sc->sc_mii->mii_media_active) != IFM_NONE) 2026 sc->sc_flags |= GEM_LINK; 2027 else 2028 sc->sc_flags &= ~GEM_LINK; 2029 2030 switch (IFM_SUBTYPE(sc->sc_mii->mii_media_active)) { 2031 case IFM_1000_SX: 2032 case IFM_1000_LX: 2033 case IFM_1000_CX: 2034 case IFM_1000_T: 2035 gigabit = 1; 2036 break; 2037 default: 2038 gigabit = 0; 2039 } 2040 2041 /* 2042 * The configuration done here corresponds to the steps F) and 2043 * G) and as far as enabling of RX and TX MAC goes also step H) 2044 * of the initialization sequence outlined in section 3.2.1 of 2045 * the GEM Gigabit Ethernet ASIC Specification. 2046 */ 2047 2048 rxcfg = sc->sc_mac_rxcfg; 2049 rxcfg &= ~GEM_MAC_RX_CARR_EXTEND; 2050 txcfg = GEM_MAC_TX_ENA_IPG0 | GEM_MAC_TX_NGU | GEM_MAC_TX_NGU_LIMIT; 2051 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & IFM_FDX) != 0) 2052 txcfg |= GEM_MAC_TX_IGN_CARRIER | GEM_MAC_TX_IGN_COLLIS; 2053 else if (gigabit != 0) { 2054 rxcfg |= GEM_MAC_RX_CARR_EXTEND; 2055 txcfg |= GEM_MAC_TX_CARR_EXTEND; 2056 } 2057 (void)gem_disable_tx(sc); 2058 GEM_BANK1_WRITE_4(sc, GEM_MAC_TX_CONFIG, txcfg); 2059 (void)gem_disable_rx(sc); 2060 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CONFIG, rxcfg); 2061 2062 v = GEM_BANK1_READ_4(sc, GEM_MAC_CONTROL_CONFIG) & 2063 ~(GEM_MAC_CC_RX_PAUSE | GEM_MAC_CC_TX_PAUSE); 2064 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & 2065 IFM_ETH_RXPAUSE) != 0) 2066 v |= GEM_MAC_CC_RX_PAUSE; 2067 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & 2068 IFM_ETH_TXPAUSE) != 0) 2069 v |= GEM_MAC_CC_TX_PAUSE; 2070 GEM_BANK1_WRITE_4(sc, GEM_MAC_CONTROL_CONFIG, v); 2071 2072 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & IFM_FDX) == 0 && 2073 gigabit != 0) 2074 GEM_BANK1_WRITE_4(sc, GEM_MAC_SLOT_TIME, 2075 GEM_MAC_SLOT_TIME_CARR_EXTEND); 2076 else 2077 GEM_BANK1_WRITE_4(sc, GEM_MAC_SLOT_TIME, 2078 GEM_MAC_SLOT_TIME_NORMAL); 2079 2080 /* XIF Configuration */ 2081 v = GEM_MAC_XIF_LINK_LED; 2082 v |= GEM_MAC_XIF_TX_MII_ENA; 2083 if ((sc->sc_flags & GEM_SERDES) == 0) { 2084 if ((GEM_BANK1_READ_4(sc, GEM_MIF_CONFIG) & 2085 GEM_MIF_CONFIG_PHY_SEL) != 0) { 2086 /* External MII needs echo disable if half duplex. */ 2087 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & 2088 IFM_FDX) == 0) 2089 v |= GEM_MAC_XIF_ECHO_DISABL; 2090 } else 2091 /* 2092 * Internal MII needs buffer enable. 2093 * XXX buffer enable makes only sense for an 2094 * external PHY. 2095 */ 2096 v |= GEM_MAC_XIF_MII_BUF_ENA; 2097 } 2098 if (gigabit != 0) 2099 v |= GEM_MAC_XIF_GMII_MODE; 2100 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & IFM_FDX) != 0) 2101 v |= GEM_MAC_XIF_FDPLX_LED; 2102 GEM_BANK1_WRITE_4(sc, GEM_MAC_XIF_CONFIG, v); 2103 2104 sc->sc_mac_rxcfg = rxcfg; 2105 if ((sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) != 0 && 2106 (sc->sc_flags & GEM_LINK) != 0) { 2107 GEM_BANK1_WRITE_4(sc, GEM_MAC_TX_CONFIG, 2108 txcfg | GEM_MAC_TX_ENABLE); 2109 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CONFIG, 2110 rxcfg | GEM_MAC_RX_ENABLE); 2111 } 2112 } 2113 2114 int 2115 gem_mediachange(struct ifnet *ifp) 2116 { 2117 struct gem_softc *sc = ifp->if_softc; 2118 int error; 2119 2120 /* XXX add support for serial media. */ 2121 2122 GEM_LOCK(sc); 2123 error = mii_mediachg(sc->sc_mii); 2124 GEM_UNLOCK(sc); 2125 return (error); 2126 } 2127 2128 void 2129 gem_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) 2130 { 2131 struct gem_softc *sc = ifp->if_softc; 2132 2133 GEM_LOCK(sc); 2134 if ((ifp->if_flags & IFF_UP) == 0) { 2135 GEM_UNLOCK(sc); 2136 return; 2137 } 2138 2139 mii_pollstat(sc->sc_mii); 2140 ifmr->ifm_active = sc->sc_mii->mii_media_active; 2141 ifmr->ifm_status = sc->sc_mii->mii_media_status; 2142 GEM_UNLOCK(sc); 2143 } 2144 2145 static int 2146 gem_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 2147 { 2148 struct gem_softc *sc = ifp->if_softc; 2149 struct ifreq *ifr = (struct ifreq *)data; 2150 int error; 2151 2152 error = 0; 2153 switch (cmd) { 2154 case SIOCSIFFLAGS: 2155 GEM_LOCK(sc); 2156 if ((ifp->if_flags & IFF_UP) != 0) { 2157 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0 && 2158 ((ifp->if_flags ^ sc->sc_ifflags) & 2159 (IFF_ALLMULTI | IFF_PROMISC)) != 0) 2160 gem_setladrf(sc); 2161 else 2162 gem_init_locked(sc); 2163 } else if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) 2164 gem_stop(ifp, 0); 2165 if ((ifp->if_flags & IFF_LINK0) != 0) 2166 sc->sc_csum_features |= CSUM_UDP; 2167 else 2168 sc->sc_csum_features &= ~CSUM_UDP; 2169 if ((ifp->if_capenable & IFCAP_TXCSUM) != 0) 2170 ifp->if_hwassist = sc->sc_csum_features; 2171 sc->sc_ifflags = ifp->if_flags; 2172 GEM_UNLOCK(sc); 2173 break; 2174 case SIOCADDMULTI: 2175 case SIOCDELMULTI: 2176 GEM_LOCK(sc); 2177 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) 2178 gem_setladrf(sc); 2179 GEM_UNLOCK(sc); 2180 break; 2181 case SIOCGIFMEDIA: 2182 case SIOCSIFMEDIA: 2183 error = ifmedia_ioctl(ifp, ifr, &sc->sc_mii->mii_media, cmd); 2184 break; 2185 case SIOCSIFCAP: 2186 GEM_LOCK(sc); 2187 ifp->if_capenable = ifr->ifr_reqcap; 2188 if ((ifp->if_capenable & IFCAP_TXCSUM) != 0) 2189 ifp->if_hwassist = sc->sc_csum_features; 2190 else 2191 ifp->if_hwassist = 0; 2192 GEM_UNLOCK(sc); 2193 break; 2194 default: 2195 error = ether_ioctl(ifp, cmd, data); 2196 break; 2197 } 2198 2199 return (error); 2200 } 2201 2202 static void 2203 gem_setladrf(struct gem_softc *sc) 2204 { 2205 struct ifnet *ifp = sc->sc_ifp; 2206 struct ifmultiaddr *inm; 2207 int i; 2208 uint32_t hash[16]; 2209 uint32_t crc, v; 2210 2211 GEM_LOCK_ASSERT(sc, MA_OWNED); 2212 2213 /* 2214 * Turn off the RX MAC and the hash filter as required by the Sun GEM 2215 * programming restrictions. 2216 */ 2217 v = sc->sc_mac_rxcfg & GEM_MAC_RX_HASH_FILTER; 2218 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CONFIG, v); 2219 GEM_BANK1_BARRIER(sc, GEM_MAC_RX_CONFIG, 4, 2220 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 2221 if (!GEM_BANK1_BITWAIT(sc, GEM_MAC_RX_CONFIG, GEM_MAC_RX_HASH_FILTER | 2222 GEM_MAC_RX_ENABLE, 0)) 2223 device_printf(sc->sc_dev, 2224 "cannot disable RX MAC or hash filter\n"); 2225 2226 v &= ~(GEM_MAC_RX_PROMISCUOUS | GEM_MAC_RX_PROMISC_GRP); 2227 if ((ifp->if_flags & IFF_PROMISC) != 0) { 2228 v |= GEM_MAC_RX_PROMISCUOUS; 2229 goto chipit; 2230 } 2231 if ((ifp->if_flags & IFF_ALLMULTI) != 0) { 2232 v |= GEM_MAC_RX_PROMISC_GRP; 2233 goto chipit; 2234 } 2235 2236 /* 2237 * Set up multicast address filter by passing all multicast 2238 * addresses through a crc generator, and then using the high 2239 * order 8 bits as an index into the 256 bit logical address 2240 * filter. The high order 4 bits selects the word, while the 2241 * other 4 bits select the bit within the word (where bit 0 2242 * is the MSB). 2243 */ 2244 2245 /* Clear the hash table. */ 2246 memset(hash, 0, sizeof(hash)); 2247 2248 if_maddr_rlock(ifp); 2249 TAILQ_FOREACH(inm, &ifp->if_multiaddrs, ifma_link) { 2250 if (inm->ifma_addr->sa_family != AF_LINK) 2251 continue; 2252 crc = ether_crc32_le(LLADDR((struct sockaddr_dl *) 2253 inm->ifma_addr), ETHER_ADDR_LEN); 2254 2255 /* We just want the 8 most significant bits. */ 2256 crc >>= 24; 2257 2258 /* Set the corresponding bit in the filter. */ 2259 hash[crc >> 4] |= 1 << (15 - (crc & 15)); 2260 } 2261 if_maddr_runlock(ifp); 2262 2263 v |= GEM_MAC_RX_HASH_FILTER; 2264 2265 /* Now load the hash table into the chip (if we are using it). */ 2266 for (i = 0; i < 16; i++) 2267 GEM_BANK1_WRITE_4(sc, 2268 GEM_MAC_HASH0 + i * (GEM_MAC_HASH1 - GEM_MAC_HASH0), 2269 hash[i]); 2270 2271 chipit: 2272 sc->sc_mac_rxcfg = v; 2273 GEM_BANK1_WRITE_4(sc, GEM_MAC_RX_CONFIG, v | GEM_MAC_RX_ENABLE); 2274 }
Cache object: 43eaa1f7b52f3cd909f684c568495354
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