bcm53xx_eth.c revision 1.27
1 /*- 2 * Copyright (c) 2012 The NetBSD Foundation, Inc. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to The NetBSD Foundation 6 * by Matt Thomas of 3am Software Foundry. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #define _ARM32_BUS_DMA_PRIVATE 31 #define GMAC_PRIVATE 32 33 #include "locators.h" 34 #include "opt_broadcom.h" 35 36 #include <sys/cdefs.h> 37 38 __KERNEL_RCSID(1, "$NetBSD: bcm53xx_eth.c,v 1.27 2016/02/09 08:32:08 ozaki-r Exp $"); 39 40 #include <sys/param.h> 41 #include <sys/atomic.h> 42 #include <sys/bus.h> 43 #include <sys/device.h> 44 #include <sys/ioctl.h> 45 #include <sys/intr.h> 46 #include <sys/kmem.h> 47 #include <sys/mutex.h> 48 #include <sys/socket.h> 49 #include <sys/systm.h> 50 #include <sys/workqueue.h> 51 52 #include <net/if.h> 53 #include <net/if_ether.h> 54 #include <net/if_media.h> 55 56 #include <net/if_dl.h> 57 58 #include <net/bpf.h> 59 60 #include <dev/mii/miivar.h> 61 62 #include <arm/locore.h> 63 64 #include <arm/broadcom/bcm53xx_reg.h> 65 #include <arm/broadcom/bcm53xx_var.h> 66 67 //#define BCMETH_MPSAFE 68 69 #ifdef BCMETH_COUNTERS 70 #define BCMETH_EVCNT_ADD(a,b) ((void)((a).ev_count += (b))) 71 #else 72 #define BCMETH_EVCNT_ADD(a,b) do { } while (/*CONSTCOND*/0) 73 #endif 74 #define BCMETH_EVCNT_INCR(a) BCMETH_EVCNT_ADD((a), 1) 75 76 #define BCMETH_MAXTXMBUFS 128 77 #define BCMETH_NTXSEGS 30 78 #define BCMETH_MAXRXMBUFS 255 79 #define BCMETH_MINRXMBUFS 64 80 #define BCMETH_NRXSEGS 1 81 #define BCMETH_RINGSIZE PAGE_SIZE 82 83 #if 1 84 #define BCMETH_RCVMAGIC 0xfeedface 85 #endif 86 87 static int bcmeth_ccb_match(device_t, cfdata_t, void *); 88 static void bcmeth_ccb_attach(device_t, device_t, void *); 89 90 struct bcmeth_txqueue { 91 bus_dmamap_t txq_descmap; 92 struct gmac_txdb *txq_consumer; 93 struct gmac_txdb *txq_producer; 94 struct gmac_txdb *txq_first; 95 struct gmac_txdb *txq_last; 96 struct ifqueue txq_mbufs; 97 struct mbuf *txq_next; 98 size_t txq_free; 99 size_t txq_threshold; 100 size_t txq_lastintr; 101 bus_size_t txq_reg_xmtaddrlo; 102 bus_size_t txq_reg_xmtptr; 103 bus_size_t txq_reg_xmtctl; 104 bus_size_t txq_reg_xmtsts0; 105 bus_size_t txq_reg_xmtsts1; 106 bus_dma_segment_t txq_descmap_seg; 107 }; 108 109 struct bcmeth_rxqueue { 110 bus_dmamap_t rxq_descmap; 111 struct gmac_rxdb *rxq_consumer; 112 struct gmac_rxdb *rxq_producer; 113 struct gmac_rxdb *rxq_first; 114 struct gmac_rxdb *rxq_last; 115 struct mbuf *rxq_mhead; 116 struct mbuf **rxq_mtail; 117 struct mbuf *rxq_mconsumer; 118 size_t rxq_inuse; 119 size_t rxq_threshold; 120 bus_size_t rxq_reg_rcvaddrlo; 121 bus_size_t rxq_reg_rcvptr; 122 bus_size_t rxq_reg_rcvctl; 123 bus_size_t rxq_reg_rcvsts0; 124 bus_size_t rxq_reg_rcvsts1; 125 bus_dma_segment_t rxq_descmap_seg; 126 }; 127 128 struct bcmeth_mapcache { 129 u_int dmc_nmaps; 130 u_int dmc_maxseg; 131 u_int dmc_maxmaps; 132 u_int dmc_maxmapsize; 133 bus_dmamap_t dmc_maps[0]; 134 }; 135 136 struct bcmeth_softc { 137 device_t sc_dev; 138 bus_space_tag_t sc_bst; 139 bus_space_handle_t sc_bsh; 140 bus_dma_tag_t sc_dmat; 141 kmutex_t *sc_lock; 142 kmutex_t *sc_hwlock; 143 struct ethercom sc_ec; 144 #define sc_if sc_ec.ec_if 145 struct ifmedia sc_media; 146 void *sc_soft_ih; 147 void *sc_ih; 148 149 struct bcmeth_rxqueue sc_rxq; 150 struct bcmeth_txqueue sc_txq; 151 152 size_t sc_rcvoffset; 153 uint32_t sc_macaddr[2]; 154 uint32_t sc_maxfrm; 155 uint32_t sc_cmdcfg; 156 uint32_t sc_intmask; 157 uint32_t sc_rcvlazy; 158 volatile uint32_t sc_soft_flags; 159 #define SOFT_RXINTR 0x01 160 #define SOFT_TXINTR 0x02 161 162 #ifdef BCMETH_COUNTERS 163 struct evcnt sc_ev_intr; 164 struct evcnt sc_ev_soft_intr; 165 struct evcnt sc_ev_work; 166 struct evcnt sc_ev_tx_stall; 167 struct evcnt sc_ev_rx_badmagic_lo; 168 struct evcnt sc_ev_rx_badmagic_hi; 169 #endif 170 171 struct ifqueue sc_rx_bufcache; 172 struct bcmeth_mapcache *sc_rx_mapcache; 173 struct bcmeth_mapcache *sc_tx_mapcache; 174 175 struct workqueue *sc_workq; 176 struct work sc_work; 177 178 volatile uint32_t sc_work_flags; 179 #define WORK_RXINTR 0x01 180 #define WORK_RXUNDERFLOW 0x02 181 #define WORK_REINIT 0x04 182 183 uint8_t sc_enaddr[ETHER_ADDR_LEN]; 184 }; 185 186 static void bcmeth_ifstart(struct ifnet *); 187 static void bcmeth_ifwatchdog(struct ifnet *); 188 static int bcmeth_ifinit(struct ifnet *); 189 static void bcmeth_ifstop(struct ifnet *, int); 190 static int bcmeth_ifioctl(struct ifnet *, u_long, void *); 191 192 static int bcmeth_mapcache_create(struct bcmeth_softc *, 193 struct bcmeth_mapcache **, size_t, size_t, size_t); 194 static void bcmeth_mapcache_destroy(struct bcmeth_softc *, 195 struct bcmeth_mapcache *); 196 static bus_dmamap_t bcmeth_mapcache_get(struct bcmeth_softc *, 197 struct bcmeth_mapcache *); 198 static void bcmeth_mapcache_put(struct bcmeth_softc *, 199 struct bcmeth_mapcache *, bus_dmamap_t); 200 201 static int bcmeth_txq_attach(struct bcmeth_softc *, 202 struct bcmeth_txqueue *, u_int); 203 static void bcmeth_txq_purge(struct bcmeth_softc *, 204 struct bcmeth_txqueue *); 205 static void bcmeth_txq_reset(struct bcmeth_softc *, 206 struct bcmeth_txqueue *); 207 static bool bcmeth_txq_consume(struct bcmeth_softc *, 208 struct bcmeth_txqueue *); 209 static bool bcmeth_txq_produce(struct bcmeth_softc *, 210 struct bcmeth_txqueue *, struct mbuf *m); 211 static bool bcmeth_txq_active_p(struct bcmeth_softc *, 212 struct bcmeth_txqueue *); 213 214 static int bcmeth_rxq_attach(struct bcmeth_softc *, 215 struct bcmeth_rxqueue *, u_int); 216 static bool bcmeth_rxq_produce(struct bcmeth_softc *, 217 struct bcmeth_rxqueue *); 218 static void bcmeth_rxq_purge(struct bcmeth_softc *, 219 struct bcmeth_rxqueue *, bool); 220 static void bcmeth_rxq_reset(struct bcmeth_softc *, 221 struct bcmeth_rxqueue *); 222 223 static int bcmeth_intr(void *); 224 #ifdef BCMETH_MPSAFETX 225 static void bcmeth_soft_txintr(struct bcmeth_softc *); 226 #endif 227 static void bcmeth_soft_intr(void *); 228 static void bcmeth_worker(struct work *, void *); 229 230 static int bcmeth_mediachange(struct ifnet *); 231 static void bcmeth_mediastatus(struct ifnet *, struct ifmediareq *); 232 233 static inline uint32_t 234 bcmeth_read_4(struct bcmeth_softc *sc, bus_size_t o) 235 { 236 return bus_space_read_4(sc->sc_bst, sc->sc_bsh, o); 237 } 238 239 static inline void 240 bcmeth_write_4(struct bcmeth_softc *sc, bus_size_t o, uint32_t v) 241 { 242 bus_space_write_4(sc->sc_bst, sc->sc_bsh, o, v); 243 } 244 245 CFATTACH_DECL_NEW(bcmeth_ccb, sizeof(struct bcmeth_softc), 246 bcmeth_ccb_match, bcmeth_ccb_attach, NULL, NULL); 247 248 static int 249 bcmeth_ccb_match(device_t parent, cfdata_t cf, void *aux) 250 { 251 struct bcmccb_attach_args * const ccbaa = aux; 252 const struct bcm_locators * const loc = &ccbaa->ccbaa_loc; 253 254 if (strcmp(cf->cf_name, loc->loc_name)) 255 return 0; 256 257 #ifdef DIAGNOSTIC 258 const int port = cf->cf_loc[BCMCCBCF_PORT]; 259 #endif 260 KASSERT(port == BCMCCBCF_PORT_DEFAULT || port == loc->loc_port); 261 262 return 1; 263 } 264 265 static void 266 bcmeth_ccb_attach(device_t parent, device_t self, void *aux) 267 { 268 struct bcmeth_softc * const sc = device_private(self); 269 struct ethercom * const ec = &sc->sc_ec; 270 struct ifnet * const ifp = &ec->ec_if; 271 struct bcmccb_attach_args * const ccbaa = aux; 272 const struct bcm_locators * const loc = &ccbaa->ccbaa_loc; 273 const char * const xname = device_xname(self); 274 prop_dictionary_t dict = device_properties(self); 275 int error; 276 277 sc->sc_bst = ccbaa->ccbaa_ccb_bst; 278 sc->sc_dmat = ccbaa->ccbaa_dmat; 279 bus_space_subregion(sc->sc_bst, ccbaa->ccbaa_ccb_bsh, 280 loc->loc_offset, loc->loc_size, &sc->sc_bsh); 281 282 /* 283 * We need to use the coherent dma tag for the GMAC. 284 */ 285 sc->sc_dmat = &bcm53xx_coherent_dma_tag; 286 #if _ARM32_NEED_BUS_DMA_BOUNCE 287 if (device_cfdata(self)->cf_flags & 2) { 288 sc->sc_dmat = &bcm53xx_bounce_dma_tag; 289 } 290 #endif 291 292 prop_data_t eaprop = prop_dictionary_get(dict, "mac-address"); 293 if (eaprop == NULL) { 294 uint32_t mac0 = bcmeth_read_4(sc, UNIMAC_MAC_0); 295 uint32_t mac1 = bcmeth_read_4(sc, UNIMAC_MAC_1); 296 if ((mac0 == 0 && mac1 == 0) || (mac1 & 1)) { 297 aprint_error(": mac-address property is missing\n"); 298 return; 299 } 300 sc->sc_enaddr[0] = (mac0 >> 0) & 0xff; 301 sc->sc_enaddr[1] = (mac0 >> 8) & 0xff; 302 sc->sc_enaddr[2] = (mac0 >> 16) & 0xff; 303 sc->sc_enaddr[3] = (mac0 >> 24) & 0xff; 304 sc->sc_enaddr[4] = (mac1 >> 0) & 0xff; 305 sc->sc_enaddr[5] = (mac1 >> 8) & 0xff; 306 } else { 307 KASSERT(prop_object_type(eaprop) == PROP_TYPE_DATA); 308 KASSERT(prop_data_size(eaprop) == ETHER_ADDR_LEN); 309 memcpy(sc->sc_enaddr, prop_data_data_nocopy(eaprop), 310 ETHER_ADDR_LEN); 311 } 312 sc->sc_dev = self; 313 sc->sc_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_SOFTNET); 314 sc->sc_hwlock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_VM); 315 316 bcmeth_write_4(sc, GMAC_INTMASK, 0); // disable interrupts 317 318 aprint_naive("\n"); 319 aprint_normal(": Gigabit Ethernet Controller\n"); 320 321 error = bcmeth_rxq_attach(sc, &sc->sc_rxq, 0); 322 if (error) { 323 aprint_error(": failed to init rxq: %d\n", error); 324 return; 325 } 326 327 error = bcmeth_txq_attach(sc, &sc->sc_txq, 0); 328 if (error) { 329 aprint_error(": failed to init txq: %d\n", error); 330 return; 331 } 332 333 error = bcmeth_mapcache_create(sc, &sc->sc_rx_mapcache, 334 BCMETH_MAXRXMBUFS, MCLBYTES, BCMETH_NRXSEGS); 335 if (error) { 336 aprint_error(": failed to allocate rx dmamaps: %d\n", error); 337 return; 338 } 339 340 error = bcmeth_mapcache_create(sc, &sc->sc_tx_mapcache, 341 BCMETH_MAXTXMBUFS, MCLBYTES, BCMETH_NTXSEGS); 342 if (error) { 343 aprint_error(": failed to allocate tx dmamaps: %d\n", error); 344 return; 345 } 346 347 error = workqueue_create(&sc->sc_workq, xname, bcmeth_worker, sc, 348 (PRI_USER + MAXPRI_USER) / 2, IPL_NET, WQ_MPSAFE|WQ_PERCPU); 349 if (error) { 350 aprint_error(": failed to create workqueue: %d\n", error); 351 return; 352 } 353 354 sc->sc_soft_ih = softint_establish(SOFTINT_MPSAFE | SOFTINT_NET, 355 bcmeth_soft_intr, sc); 356 357 sc->sc_ih = intr_establish(loc->loc_intrs[0], IPL_VM, IST_LEVEL, 358 bcmeth_intr, sc); 359 360 if (sc->sc_ih == NULL) { 361 aprint_error_dev(self, "failed to establish interrupt %d\n", 362 loc->loc_intrs[0]); 363 } else { 364 aprint_normal_dev(self, "interrupting on irq %d\n", 365 loc->loc_intrs[0]); 366 } 367 368 aprint_normal_dev(sc->sc_dev, "Ethernet address %s\n", 369 ether_sprintf(sc->sc_enaddr)); 370 371 /* 372 * Since each port in plugged into the switch/flow-accelerator, 373 * we hard code at Gige Full-Duplex with Flow Control enabled. 374 */ 375 int ifmedia = IFM_ETHER|IFM_1000_T|IFM_FDX; 376 //ifmedia |= IFM_FLOW|IFM_ETH_TXPAUSE|IFM_ETH_RXPAUSE; 377 ifmedia_init(&sc->sc_media, IFM_IMASK, bcmeth_mediachange, 378 bcmeth_mediastatus); 379 ifmedia_add(&sc->sc_media, ifmedia, 0, NULL); 380 ifmedia_set(&sc->sc_media, ifmedia); 381 382 ec->ec_capabilities = ETHERCAP_VLAN_MTU | ETHERCAP_JUMBO_MTU; 383 384 strlcpy(ifp->if_xname, xname, IFNAMSIZ); 385 ifp->if_softc = sc; 386 ifp->if_baudrate = IF_Mbps(1000); 387 ifp->if_capabilities = 0; 388 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 389 #ifdef BCMETH_MPSAFE 390 ifp->if_flags2 = IFF2_MPSAFE; 391 #endif 392 ifp->if_ioctl = bcmeth_ifioctl; 393 ifp->if_start = bcmeth_ifstart; 394 ifp->if_watchdog = bcmeth_ifwatchdog; 395 ifp->if_init = bcmeth_ifinit; 396 ifp->if_stop = bcmeth_ifstop; 397 IFQ_SET_READY(&ifp->if_snd); 398 399 bcmeth_ifstop(ifp, true); 400 401 /* 402 * Attach the interface. 403 */ 404 if_initialize(ifp); 405 ether_ifattach(ifp, sc->sc_enaddr); 406 if_register(ifp); 407 408 #ifdef BCMETH_COUNTERS 409 evcnt_attach_dynamic(&sc->sc_ev_intr, EVCNT_TYPE_INTR, 410 NULL, xname, "intr"); 411 evcnt_attach_dynamic(&sc->sc_ev_soft_intr, EVCNT_TYPE_INTR, 412 NULL, xname, "soft intr"); 413 evcnt_attach_dynamic(&sc->sc_ev_work, EVCNT_TYPE_MISC, 414 NULL, xname, "work items"); 415 evcnt_attach_dynamic(&sc->sc_ev_tx_stall, EVCNT_TYPE_MISC, 416 NULL, xname, "tx stalls"); 417 evcnt_attach_dynamic(&sc->sc_ev_rx_badmagic_lo, EVCNT_TYPE_MISC, 418 NULL, xname, "rx badmagic lo"); 419 evcnt_attach_dynamic(&sc->sc_ev_rx_badmagic_hi, EVCNT_TYPE_MISC, 420 NULL, xname, "rx badmagic hi"); 421 #endif 422 } 423 424 static int 425 bcmeth_mediachange(struct ifnet *ifp) 426 { 427 //struct bcmeth_softc * const sc = ifp->if_softc; 428 return 0; 429 } 430 431 static void 432 bcmeth_mediastatus(struct ifnet *ifp, struct ifmediareq *ifm) 433 { 434 //struct bcmeth_softc * const sc = ifp->if_softc; 435 436 ifm->ifm_status = IFM_AVALID | IFM_ACTIVE; 437 ifm->ifm_active = IFM_ETHER | IFM_FDX | IFM_1000_T; 438 } 439 440 static uint64_t 441 bcmeth_macaddr_create(const uint8_t *enaddr) 442 { 443 return (enaddr[3] << 0) // UNIMAC_MAC_0 444 | (enaddr[2] << 8) // UNIMAC_MAC_0 445 | (enaddr[1] << 16) // UNIMAC_MAC_0 446 | ((uint64_t)enaddr[0] << 24) // UNIMAC_MAC_0 447 | ((uint64_t)enaddr[5] << 32) // UNIMAC_MAC_1 448 | ((uint64_t)enaddr[4] << 40); // UNIMAC_MAC_1 449 } 450 451 static int 452 bcmeth_ifinit(struct ifnet *ifp) 453 { 454 struct bcmeth_softc * const sc = ifp->if_softc; 455 int error = 0; 456 457 sc->sc_maxfrm = max(ifp->if_mtu + 32, MCLBYTES); 458 if (ifp->if_mtu > ETHERMTU_JUMBO) 459 return error; 460 461 KASSERT(ifp->if_flags & IFF_UP); 462 463 /* 464 * Stop the interface 465 */ 466 bcmeth_ifstop(ifp, 0); 467 468 /* 469 * Reserve enough space at the front so that we can insert a maxsized 470 * link header and a VLAN tag. Also make sure we have enough room for 471 * the rcvsts field as well. 472 */ 473 KASSERT(ALIGN(max_linkhdr) == max_linkhdr); 474 KASSERTMSG(max_linkhdr > sizeof(struct ether_header), "%u > %zu", 475 max_linkhdr, sizeof(struct ether_header)); 476 sc->sc_rcvoffset = max_linkhdr + 4 - sizeof(struct ether_header); 477 if (sc->sc_rcvoffset <= 4) 478 sc->sc_rcvoffset += 4; 479 KASSERT((sc->sc_rcvoffset & 3) == 2); 480 KASSERT(sc->sc_rcvoffset <= __SHIFTOUT(RCVCTL_RCVOFFSET, RCVCTL_RCVOFFSET)); 481 KASSERT(sc->sc_rcvoffset >= 6); 482 483 /* 484 * If our frame size has changed (or it's our first time through) 485 * destroy the existing transmit mapcache. 486 */ 487 if (sc->sc_tx_mapcache != NULL 488 && sc->sc_maxfrm != sc->sc_tx_mapcache->dmc_maxmapsize) { 489 bcmeth_mapcache_destroy(sc, sc->sc_tx_mapcache); 490 sc->sc_tx_mapcache = NULL; 491 } 492 493 if (sc->sc_tx_mapcache == NULL) { 494 error = bcmeth_mapcache_create(sc, &sc->sc_tx_mapcache, 495 BCMETH_MAXTXMBUFS, sc->sc_maxfrm, BCMETH_NTXSEGS); 496 if (error) 497 return error; 498 } 499 500 sc->sc_cmdcfg = NO_LENGTH_CHECK | PAUSE_IGNORE 501 | __SHIFTIN(ETH_SPEED_1000, ETH_SPEED) 502 | RX_ENA | TX_ENA; 503 504 if (ifp->if_flags & IFF_PROMISC) { 505 sc->sc_cmdcfg |= PROMISC_EN; 506 } else { 507 sc->sc_cmdcfg &= ~PROMISC_EN; 508 } 509 510 const uint8_t * const lladdr = CLLADDR(ifp->if_sadl); 511 const uint64_t macstnaddr = bcmeth_macaddr_create(lladdr); 512 513 /* 514 * We make sure that a received Ethernet packet start on a non-word 515 * boundary so that the packet payload will be on a word boundary. 516 * So to check the destination address we keep around two words to 517 * quickly compare with. 518 */ 519 #if __ARMEL__ 520 sc->sc_macaddr[0] = lladdr[0] | (lladdr[1] << 8); 521 sc->sc_macaddr[1] = lladdr[2] | (lladdr[3] << 8) 522 | (lladdr[4] << 16) | (lladdr[5] << 24); 523 #else 524 sc->sc_macaddr[0] = lladdr[1] | (lladdr[0] << 8); 525 sc->sc_macaddr[1] = lladdr[5] | (lladdr[4] << 8) 526 | (lladdr[1] << 16) | (lladdr[2] << 24); 527 #endif 528 529 sc->sc_intmask = DESCPROTOERR|DATAERR|DESCERR; 530 531 /* 5. Load RCVADDR_LO with new pointer */ 532 bcmeth_rxq_reset(sc, &sc->sc_rxq); 533 534 bcmeth_write_4(sc, sc->sc_rxq.rxq_reg_rcvctl, 535 __SHIFTIN(sc->sc_rcvoffset, RCVCTL_RCVOFFSET) 536 | RCVCTL_PARITY_DIS 537 | RCVCTL_OFLOW_CONTINUE 538 | __SHIFTIN(3, RCVCTL_BURSTLEN)); 539 540 /* 6. Load XMTADDR_LO with new pointer */ 541 bcmeth_txq_reset(sc, &sc->sc_txq); 542 543 bcmeth_write_4(sc, sc->sc_txq.txq_reg_xmtctl, XMTCTL_DMA_ACT_INDEX 544 | XMTCTL_PARITY_DIS 545 | __SHIFTIN(3, XMTCTL_BURSTLEN)); 546 547 /* 7. Setup other UNIMAC registers */ 548 bcmeth_write_4(sc, UNIMAC_FRAME_LEN, sc->sc_maxfrm); 549 bcmeth_write_4(sc, UNIMAC_MAC_0, (uint32_t)(macstnaddr >> 0)); 550 bcmeth_write_4(sc, UNIMAC_MAC_1, (uint32_t)(macstnaddr >> 32)); 551 bcmeth_write_4(sc, UNIMAC_COMMAND_CONFIG, sc->sc_cmdcfg); 552 553 uint32_t devctl = bcmeth_read_4(sc, GMAC_DEVCONTROL); 554 devctl |= RGMII_LINK_STATUS_SEL | NWAY_AUTO_POLL_EN | TXARB_STRICT_MODE; 555 devctl &= ~FLOW_CTRL_MODE; 556 devctl &= ~MIB_RD_RESET_EN; 557 devctl &= ~RXQ_OVERFLOW_CTRL_SEL; 558 devctl &= ~CPU_FLOW_CTRL_ON; 559 bcmeth_write_4(sc, GMAC_DEVCONTROL, devctl); 560 561 /* Setup lazy receive (at most 1ms). */ 562 const struct cpu_softc * const cpu = curcpu()->ci_softc; 563 sc->sc_rcvlazy = __SHIFTIN(4, INTRCVLAZY_FRAMECOUNT) 564 | __SHIFTIN(cpu->cpu_clk.clk_apb / 1000, INTRCVLAZY_TIMEOUT); 565 bcmeth_write_4(sc, GMAC_INTRCVLAZY, sc->sc_rcvlazy); 566 567 /* 11. Enable transmit queues in TQUEUE, and ensure that the transmit scheduling mode is correctly set in TCTRL. */ 568 sc->sc_intmask |= XMTINT_0|XMTUF; 569 bcmeth_write_4(sc, sc->sc_txq.txq_reg_xmtctl, 570 bcmeth_read_4(sc, sc->sc_txq.txq_reg_xmtctl) | XMTCTL_ENABLE); 571 572 573 /* 12. Enable receive queues in RQUEUE, */ 574 sc->sc_intmask |= RCVINT|RCVDESCUF|RCVFIFOOF; 575 bcmeth_write_4(sc, sc->sc_rxq.rxq_reg_rcvctl, 576 bcmeth_read_4(sc, sc->sc_rxq.rxq_reg_rcvctl) | RCVCTL_ENABLE); 577 578 bcmeth_rxq_produce(sc, &sc->sc_rxq); /* fill with rx buffers */ 579 580 #if 0 581 aprint_normal_dev(sc->sc_dev, 582 "devctl=%#x ucmdcfg=%#x xmtctl=%#x rcvctl=%#x\n", 583 devctl, sc->sc_cmdcfg, 584 bcmeth_read_4(sc, sc->sc_txq.txq_reg_xmtctl), 585 bcmeth_read_4(sc, sc->sc_rxq.rxq_reg_rcvctl)); 586 #endif 587 588 sc->sc_soft_flags = 0; 589 590 bcmeth_write_4(sc, GMAC_INTMASK, sc->sc_intmask); 591 592 ifp->if_flags |= IFF_RUNNING; 593 594 return error; 595 } 596 597 static void 598 bcmeth_ifstop(struct ifnet *ifp, int disable) 599 { 600 struct bcmeth_softc * const sc = ifp->if_softc; 601 struct bcmeth_txqueue * const txq = &sc->sc_txq; 602 struct bcmeth_rxqueue * const rxq = &sc->sc_rxq; 603 604 KASSERT(!cpu_intr_p()); 605 606 sc->sc_soft_flags = 0; 607 sc->sc_work_flags = 0; 608 609 /* Disable Rx processing */ 610 bcmeth_write_4(sc, rxq->rxq_reg_rcvctl, 611 bcmeth_read_4(sc, rxq->rxq_reg_rcvctl) & ~RCVCTL_ENABLE); 612 613 /* Disable Tx processing */ 614 bcmeth_write_4(sc, txq->txq_reg_xmtctl, 615 bcmeth_read_4(sc, txq->txq_reg_xmtctl) & ~XMTCTL_ENABLE); 616 617 /* Disable all interrupts */ 618 bcmeth_write_4(sc, GMAC_INTMASK, 0); 619 620 for (;;) { 621 uint32_t tx0 = bcmeth_read_4(sc, txq->txq_reg_xmtsts0); 622 uint32_t rx0 = bcmeth_read_4(sc, rxq->rxq_reg_rcvsts0); 623 if (__SHIFTOUT(tx0, XMTSTATE) == XMTSTATE_DIS 624 && __SHIFTOUT(rx0, RCVSTATE) == RCVSTATE_DIS) 625 break; 626 delay(50); 627 } 628 /* 629 * Now reset the controller. 630 * 631 * 3. Set SW_RESET bit in UNIMAC_COMMAND_CONFIG register 632 * 4. Clear SW_RESET bit in UNIMAC_COMMAND_CONFIG register 633 */ 634 bcmeth_write_4(sc, UNIMAC_COMMAND_CONFIG, SW_RESET); 635 bcmeth_write_4(sc, GMAC_INTSTATUS, ~0); 636 sc->sc_intmask = 0; 637 ifp->if_flags &= ~IFF_RUNNING; 638 639 /* 640 * Let's consume any remaining transmitted packets. And if we are 641 * disabling the interface, purge ourselves of any untransmitted 642 * packets. But don't consume any received packets, just drop them. 643 * If we aren't disabling the interface, save the mbufs in the 644 * receive queue for reuse. 645 */ 646 bcmeth_rxq_purge(sc, &sc->sc_rxq, disable); 647 bcmeth_txq_consume(sc, &sc->sc_txq); 648 if (disable) { 649 bcmeth_txq_purge(sc, &sc->sc_txq); 650 IF_PURGE(&ifp->if_snd); 651 } 652 653 bcmeth_write_4(sc, UNIMAC_COMMAND_CONFIG, 0); 654 } 655 656 static void 657 bcmeth_ifwatchdog(struct ifnet *ifp) 658 { 659 } 660 661 static int 662 bcmeth_ifioctl(struct ifnet *ifp, u_long cmd, void *data) 663 { 664 struct bcmeth_softc *sc = ifp->if_softc; 665 struct ifreq * const ifr = data; 666 const int s = splnet(); 667 int error; 668 669 switch (cmd) { 670 case SIOCSIFMEDIA: 671 case SIOCGIFMEDIA: 672 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 673 break; 674 675 default: 676 error = ether_ioctl(ifp, cmd, data); 677 if (error != ENETRESET) 678 break; 679 680 if (cmd == SIOCADDMULTI || cmd == SIOCDELMULTI) { 681 error = 0; 682 break; 683 } 684 error = bcmeth_ifinit(ifp); 685 break; 686 } 687 688 splx(s); 689 return error; 690 } 691 692 static void 693 bcmeth_rxq_desc_presync( 694 struct bcmeth_softc *sc, 695 struct bcmeth_rxqueue *rxq, 696 struct gmac_rxdb *rxdb, 697 size_t count) 698 { 699 bus_dmamap_sync(sc->sc_dmat, rxq->rxq_descmap, 700 (rxdb - rxq->rxq_first) * sizeof(*rxdb), count * sizeof(*rxdb), 701 BUS_DMASYNC_PREWRITE); 702 } 703 704 static void 705 bcmeth_rxq_desc_postsync( 706 struct bcmeth_softc *sc, 707 struct bcmeth_rxqueue *rxq, 708 struct gmac_rxdb *rxdb, 709 size_t count) 710 { 711 bus_dmamap_sync(sc->sc_dmat, rxq->rxq_descmap, 712 (rxdb - rxq->rxq_first) * sizeof(*rxdb), count * sizeof(*rxdb), 713 BUS_DMASYNC_POSTWRITE); 714 } 715 716 static void 717 bcmeth_txq_desc_presync( 718 struct bcmeth_softc *sc, 719 struct bcmeth_txqueue *txq, 720 struct gmac_txdb *txdb, 721 size_t count) 722 { 723 bus_dmamap_sync(sc->sc_dmat, txq->txq_descmap, 724 (txdb - txq->txq_first) * sizeof(*txdb), count * sizeof(*txdb), 725 BUS_DMASYNC_PREWRITE); 726 } 727 728 static void 729 bcmeth_txq_desc_postsync( 730 struct bcmeth_softc *sc, 731 struct bcmeth_txqueue *txq, 732 struct gmac_txdb *txdb, 733 size_t count) 734 { 735 bus_dmamap_sync(sc->sc_dmat, txq->txq_descmap, 736 (txdb - txq->txq_first) * sizeof(*txdb), count * sizeof(*txdb), 737 BUS_DMASYNC_POSTWRITE); 738 } 739 740 static bus_dmamap_t 741 bcmeth_mapcache_get( 742 struct bcmeth_softc *sc, 743 struct bcmeth_mapcache *dmc) 744 { 745 KASSERT(dmc->dmc_nmaps > 0); 746 KASSERT(dmc->dmc_maps[dmc->dmc_nmaps-1] != NULL); 747 return dmc->dmc_maps[--dmc->dmc_nmaps]; 748 } 749 750 static void 751 bcmeth_mapcache_put( 752 struct bcmeth_softc *sc, 753 struct bcmeth_mapcache *dmc, 754 bus_dmamap_t map) 755 { 756 KASSERT(map != NULL); 757 KASSERT(dmc->dmc_nmaps < dmc->dmc_maxmaps); 758 dmc->dmc_maps[dmc->dmc_nmaps++] = map; 759 } 760 761 static void 762 bcmeth_mapcache_destroy( 763 struct bcmeth_softc *sc, 764 struct bcmeth_mapcache *dmc) 765 { 766 const size_t dmc_size = 767 offsetof(struct bcmeth_mapcache, dmc_maps[dmc->dmc_maxmaps]); 768 769 for (u_int i = 0; i < dmc->dmc_maxmaps; i++) { 770 bus_dmamap_destroy(sc->sc_dmat, dmc->dmc_maps[i]); 771 } 772 kmem_intr_free(dmc, dmc_size); 773 } 774 775 static int 776 bcmeth_mapcache_create( 777 struct bcmeth_softc *sc, 778 struct bcmeth_mapcache **dmc_p, 779 size_t maxmaps, 780 size_t maxmapsize, 781 size_t maxseg) 782 { 783 const size_t dmc_size = 784 offsetof(struct bcmeth_mapcache, dmc_maps[maxmaps]); 785 struct bcmeth_mapcache * const dmc = 786 kmem_intr_zalloc(dmc_size, KM_NOSLEEP); 787 788 dmc->dmc_maxmaps = maxmaps; 789 dmc->dmc_nmaps = maxmaps; 790 dmc->dmc_maxmapsize = maxmapsize; 791 dmc->dmc_maxseg = maxseg; 792 793 for (u_int i = 0; i < maxmaps; i++) { 794 int error = bus_dmamap_create(sc->sc_dmat, dmc->dmc_maxmapsize, 795 dmc->dmc_maxseg, dmc->dmc_maxmapsize, 0, 796 BUS_DMA_WAITOK|BUS_DMA_ALLOCNOW, &dmc->dmc_maps[i]); 797 if (error) { 798 aprint_error_dev(sc->sc_dev, 799 "failed to creat dma map cache " 800 "entry %u of %zu: %d\n", 801 i, maxmaps, error); 802 while (i-- > 0) { 803 bus_dmamap_destroy(sc->sc_dmat, 804 dmc->dmc_maps[i]); 805 } 806 kmem_intr_free(dmc, dmc_size); 807 return error; 808 } 809 KASSERT(dmc->dmc_maps[i] != NULL); 810 } 811 812 *dmc_p = dmc; 813 814 return 0; 815 } 816 817 #if 0 818 static void 819 bcmeth_dmamem_free( 820 bus_dma_tag_t dmat, 821 size_t map_size, 822 bus_dma_segment_t *seg, 823 bus_dmamap_t map, 824 void *kvap) 825 { 826 bus_dmamap_destroy(dmat, map); 827 bus_dmamem_unmap(dmat, kvap, map_size); 828 bus_dmamem_free(dmat, seg, 1); 829 } 830 #endif 831 832 static int 833 bcmeth_dmamem_alloc( 834 bus_dma_tag_t dmat, 835 size_t map_size, 836 bus_dma_segment_t *seg, 837 bus_dmamap_t *map, 838 void **kvap) 839 { 840 int error; 841 int nseg; 842 843 *kvap = NULL; 844 *map = NULL; 845 846 error = bus_dmamem_alloc(dmat, map_size, 2*PAGE_SIZE, 0, 847 seg, 1, &nseg, 0); 848 if (error) 849 return error; 850 851 KASSERT(nseg == 1); 852 853 error = bus_dmamem_map(dmat, seg, nseg, map_size, (void **)kvap, 0); 854 if (error == 0) { 855 error = bus_dmamap_create(dmat, map_size, 1, map_size, 0, 0, 856 map); 857 if (error == 0) { 858 error = bus_dmamap_load(dmat, *map, *kvap, map_size, 859 NULL, 0); 860 if (error == 0) 861 return 0; 862 bus_dmamap_destroy(dmat, *map); 863 *map = NULL; 864 } 865 bus_dmamem_unmap(dmat, *kvap, map_size); 866 *kvap = NULL; 867 } 868 bus_dmamem_free(dmat, seg, nseg); 869 return 0; 870 } 871 872 static struct mbuf * 873 bcmeth_rx_buf_alloc( 874 struct bcmeth_softc *sc) 875 { 876 struct mbuf *m = m_gethdr(M_DONTWAIT, MT_DATA); 877 if (m == NULL) { 878 printf("%s:%d: %s\n", __func__, __LINE__, "m_gethdr"); 879 return NULL; 880 } 881 MCLGET(m, M_DONTWAIT); 882 if ((m->m_flags & M_EXT) == 0) { 883 printf("%s:%d: %s\n", __func__, __LINE__, "MCLGET"); 884 m_freem(m); 885 return NULL; 886 } 887 m->m_len = m->m_pkthdr.len = m->m_ext.ext_size; 888 889 bus_dmamap_t map = bcmeth_mapcache_get(sc, sc->sc_rx_mapcache); 890 if (map == NULL) { 891 printf("%s:%d: %s\n", __func__, __LINE__, "map get"); 892 m_freem(m); 893 return NULL; 894 } 895 M_SETCTX(m, map); 896 m->m_len = m->m_pkthdr.len = MCLBYTES; 897 int error = bus_dmamap_load_mbuf(sc->sc_dmat, map, m, 898 BUS_DMA_READ|BUS_DMA_NOWAIT); 899 if (error) { 900 aprint_error_dev(sc->sc_dev, "fail to load rx dmamap: %d\n", 901 error); 902 M_SETCTX(m, NULL); 903 m_freem(m); 904 bcmeth_mapcache_put(sc, sc->sc_rx_mapcache, map); 905 return NULL; 906 } 907 KASSERT(map->dm_mapsize == MCLBYTES); 908 #ifdef BCMETH_RCVMAGIC 909 *mtod(m, uint32_t *) = htole32(BCMETH_RCVMAGIC); 910 bus_dmamap_sync(sc->sc_dmat, map, 0, sizeof(uint32_t), 911 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 912 bus_dmamap_sync(sc->sc_dmat, map, sizeof(uint32_t), 913 map->dm_mapsize - sizeof(uint32_t), BUS_DMASYNC_PREREAD); 914 #else 915 bus_dmamap_sync(sc->sc_dmat, map, 0, map->dm_mapsize, 916 BUS_DMASYNC_PREREAD); 917 #endif 918 919 return m; 920 } 921 922 static void 923 bcmeth_rx_map_unload( 924 struct bcmeth_softc *sc, 925 struct mbuf *m) 926 { 927 KASSERT(m); 928 for (; m != NULL; m = m->m_next) { 929 bus_dmamap_t map = M_GETCTX(m, bus_dmamap_t); 930 KASSERT(map); 931 KASSERT(map->dm_mapsize == MCLBYTES); 932 bus_dmamap_sync(sc->sc_dmat, map, 0, m->m_len, 933 BUS_DMASYNC_POSTREAD); 934 bus_dmamap_unload(sc->sc_dmat, map); 935 bcmeth_mapcache_put(sc, sc->sc_rx_mapcache, map); 936 M_SETCTX(m, NULL); 937 } 938 } 939 940 static bool 941 bcmeth_rxq_produce( 942 struct bcmeth_softc *sc, 943 struct bcmeth_rxqueue *rxq) 944 { 945 struct gmac_rxdb *producer = rxq->rxq_producer; 946 bool produced = false; 947 948 while (rxq->rxq_inuse < rxq->rxq_threshold) { 949 struct mbuf *m; 950 IF_DEQUEUE(&sc->sc_rx_bufcache, m); 951 if (m == NULL) { 952 m = bcmeth_rx_buf_alloc(sc); 953 if (m == NULL) { 954 printf("%s: bcmeth_rx_buf_alloc failed\n", __func__); 955 break; 956 } 957 } 958 bus_dmamap_t map = M_GETCTX(m, bus_dmamap_t); 959 KASSERT(map); 960 961 producer->rxdb_buflen = htole32(MCLBYTES); 962 producer->rxdb_addrlo = htole32(map->dm_segs[0].ds_addr); 963 producer->rxdb_flags &= htole32(RXDB_FLAG_ET); 964 *rxq->rxq_mtail = m; 965 rxq->rxq_mtail = &m->m_next; 966 m->m_len = MCLBYTES; 967 m->m_next = NULL; 968 rxq->rxq_inuse++; 969 if (++producer == rxq->rxq_last) { 970 membar_producer(); 971 bcmeth_rxq_desc_presync(sc, rxq, rxq->rxq_producer, 972 rxq->rxq_last - rxq->rxq_producer); 973 producer = rxq->rxq_producer = rxq->rxq_first; 974 } 975 produced = true; 976 } 977 if (produced) { 978 membar_producer(); 979 if (producer != rxq->rxq_producer) { 980 bcmeth_rxq_desc_presync(sc, rxq, rxq->rxq_producer, 981 producer - rxq->rxq_producer); 982 rxq->rxq_producer = producer; 983 } 984 bcmeth_write_4(sc, rxq->rxq_reg_rcvptr, 985 rxq->rxq_descmap->dm_segs[0].ds_addr 986 + ((uintptr_t)producer & RCVPTR)); 987 } 988 return true; 989 } 990 991 static void 992 bcmeth_rx_input( 993 struct bcmeth_softc *sc, 994 struct mbuf *m, 995 uint32_t rxdb_flags) 996 { 997 struct ifnet * const ifp = &sc->sc_if; 998 999 bcmeth_rx_map_unload(sc, m); 1000 1001 m_adj(m, sc->sc_rcvoffset); 1002 1003 /* 1004 * If we are in promiscuous mode and this isn't a multicast, check the 1005 * destination address to make sure it matches our own. If it doesn't, 1006 * mark the packet as being received promiscuously. 1007 */ 1008 if ((sc->sc_cmdcfg & PROMISC_EN) 1009 && (m->m_data[0] & 1) == 0 1010 && (*(uint16_t *)&m->m_data[0] != sc->sc_macaddr[0] 1011 || *(uint32_t *)&m->m_data[2] != sc->sc_macaddr[1])) { 1012 m->m_flags |= M_PROMISC; 1013 } 1014 m->m_pkthdr.rcvif = ifp; 1015 1016 ifp->if_ipackets++; 1017 ifp->if_ibytes += m->m_pkthdr.len; 1018 1019 /* 1020 * Let's give it to the network subsystm to deal with. 1021 */ 1022 #ifdef BCMETH_MPSAFE 1023 mutex_exit(sc->sc_lock); 1024 if_input(ifp, m); 1025 mutex_enter(sc->sc_lock); 1026 #else 1027 int s = splnet(); 1028 bpf_mtap(ifp, m); 1029 if_input(ifp, m); 1030 splx(s); 1031 #endif 1032 } 1033 1034 static bool 1035 bcmeth_rxq_consume( 1036 struct bcmeth_softc *sc, 1037 struct bcmeth_rxqueue *rxq, 1038 size_t atmost) 1039 { 1040 struct ifnet * const ifp = &sc->sc_if; 1041 struct gmac_rxdb *consumer = rxq->rxq_consumer; 1042 size_t rxconsumed = 0; 1043 bool didconsume = false; 1044 1045 while (atmost-- > 0) { 1046 if (consumer == rxq->rxq_producer) { 1047 KASSERT(rxq->rxq_inuse == 0); 1048 break; 1049 } 1050 1051 uint32_t rcvsts0 = bcmeth_read_4(sc, rxq->rxq_reg_rcvsts0); 1052 uint32_t currdscr = __SHIFTOUT(rcvsts0, RCV_CURRDSCR); 1053 if (consumer == rxq->rxq_first + currdscr) { 1054 break; 1055 } 1056 bcmeth_rxq_desc_postsync(sc, rxq, consumer, 1); 1057 1058 /* 1059 * We own this packet again. Copy the rxsts word from it. 1060 */ 1061 rxconsumed++; 1062 didconsume = true; 1063 uint32_t rxsts; 1064 KASSERT(rxq->rxq_mhead != NULL); 1065 bus_dmamap_t map = M_GETCTX(rxq->rxq_mhead, bus_dmamap_t); 1066 bus_dmamap_sync(sc->sc_dmat, map, 0, arm_dcache_align, 1067 BUS_DMASYNC_POSTREAD); 1068 memcpy(&rxsts, rxq->rxq_mhead->m_data, 4); 1069 rxsts = le32toh(rxsts); 1070 #if 0 1071 KASSERTMSG(rxsts != BCMETH_RCVMAGIC, "currdscr=%u consumer=%zd", 1072 currdscr, consumer - rxq->rxq_first); 1073 #endif 1074 1075 /* 1076 * Get the count of descriptors. Fetch the correct number 1077 * of mbufs. 1078 */ 1079 #ifdef BCMETH_RCVMAGIC 1080 size_t desc_count = rxsts != BCMETH_RCVMAGIC ? __SHIFTOUT(rxsts, RXSTS_DESC_COUNT) + 1 : 1; 1081 #else 1082 size_t desc_count = __SHIFTOUT(rxsts, RXSTS_DESC_COUNT) + 1; 1083 #endif 1084 struct mbuf *m = rxq->rxq_mhead; 1085 struct mbuf *m_last = m; 1086 for (size_t i = 1; i < desc_count; i++) { 1087 if (++consumer == rxq->rxq_last) { 1088 consumer = rxq->rxq_first; 1089 } 1090 KASSERTMSG(consumer != rxq->rxq_first + currdscr, 1091 "i=%zu rxsts=%#x desc_count=%zu currdscr=%u consumer=%zd", 1092 i, rxsts, desc_count, currdscr, 1093 consumer - rxq->rxq_first); 1094 m_last = m_last->m_next; 1095 } 1096 1097 /* 1098 * Now remove it/them from the list of enqueued mbufs. 1099 */ 1100 if ((rxq->rxq_mhead = m_last->m_next) == NULL) 1101 rxq->rxq_mtail = &rxq->rxq_mhead; 1102 m_last->m_next = NULL; 1103 1104 #ifdef BCMETH_RCVMAGIC 1105 if (rxsts == BCMETH_RCVMAGIC) { 1106 ifp->if_ierrors++; 1107 if ((m->m_ext.ext_paddr >> 28) == 8) { 1108 BCMETH_EVCNT_INCR(sc->sc_ev_rx_badmagic_lo); 1109 } else { 1110 BCMETH_EVCNT_INCR( sc->sc_ev_rx_badmagic_hi); 1111 } 1112 IF_ENQUEUE(&sc->sc_rx_bufcache, m); 1113 } else 1114 #endif /* BCMETH_RCVMAGIC */ 1115 if (rxsts & (RXSTS_CRC_ERROR|RXSTS_OVERSIZED|RXSTS_PKT_OVERFLOW)) { 1116 aprint_error_dev(sc->sc_dev, "[%zu]: count=%zu rxsts=%#x\n", 1117 consumer - rxq->rxq_first, desc_count, rxsts); 1118 /* 1119 * We encountered an error, take the mbufs and add them 1120 * to the rx bufcache so we can quickly reuse them. 1121 */ 1122 ifp->if_ierrors++; 1123 do { 1124 struct mbuf *m0 = m->m_next; 1125 m->m_next = NULL; 1126 IF_ENQUEUE(&sc->sc_rx_bufcache, m); 1127 m = m0; 1128 } while (m); 1129 } else { 1130 uint32_t framelen = __SHIFTOUT(rxsts, RXSTS_FRAMELEN); 1131 framelen += sc->sc_rcvoffset; 1132 m->m_pkthdr.len = framelen; 1133 if (desc_count == 1) { 1134 KASSERT(framelen <= MCLBYTES); 1135 m->m_len = framelen; 1136 } else { 1137 m_last->m_len = framelen & (MCLBYTES - 1); 1138 } 1139 1140 #ifdef BCMETH_MPSAFE 1141 /* 1142 * Wrap at the last entry! 1143 */ 1144 if (++consumer == rxq->rxq_last) { 1145 KASSERT(consumer[-1].rxdb_flags & htole32(RXDB_FLAG_ET)); 1146 rxq->rxq_consumer = rxq->rxq_first; 1147 } else { 1148 rxq->rxq_consumer = consumer; 1149 } 1150 rxq->rxq_inuse -= rxconsumed; 1151 #endif /* BCMETH_MPSAFE */ 1152 1153 /* 1154 * Receive the packet (which releases our lock) 1155 */ 1156 bcmeth_rx_input(sc, m, rxsts); 1157 1158 #ifdef BCMETH_MPSAFE 1159 /* 1160 * Since we had to give up our lock, we need to 1161 * refresh these. 1162 */ 1163 consumer = rxq->rxq_consumer; 1164 rxconsumed = 0; 1165 continue; 1166 #endif /* BCMETH_MPSAFE */ 1167 } 1168 1169 /* 1170 * Wrap at the last entry! 1171 */ 1172 if (++consumer == rxq->rxq_last) { 1173 KASSERT(consumer[-1].rxdb_flags & htole32(RXDB_FLAG_ET)); 1174 consumer = rxq->rxq_first; 1175 } 1176 } 1177 1178 /* 1179 * Update queue info. 1180 */ 1181 rxq->rxq_consumer = consumer; 1182 rxq->rxq_inuse -= rxconsumed; 1183 1184 /* 1185 * Did we consume anything? 1186 */ 1187 return didconsume; 1188 } 1189 1190 static void 1191 bcmeth_rxq_purge( 1192 struct bcmeth_softc *sc, 1193 struct bcmeth_rxqueue *rxq, 1194 bool discard) 1195 { 1196 struct mbuf *m; 1197 1198 if ((m = rxq->rxq_mhead) != NULL) { 1199 if (discard) { 1200 bcmeth_rx_map_unload(sc, m); 1201 m_freem(m); 1202 } else { 1203 while (m != NULL) { 1204 struct mbuf *m0 = m->m_next; 1205 m->m_next = NULL; 1206 IF_ENQUEUE(&sc->sc_rx_bufcache, m); 1207 m = m0; 1208 } 1209 } 1210 1211 } 1212 1213 rxq->rxq_mhead = NULL; 1214 rxq->rxq_mtail = &rxq->rxq_mhead; 1215 rxq->rxq_inuse = 0; 1216 } 1217 1218 static void 1219 bcmeth_rxq_reset( 1220 struct bcmeth_softc *sc, 1221 struct bcmeth_rxqueue *rxq) 1222 { 1223 /* 1224 * sync all the descriptors 1225 */ 1226 bcmeth_rxq_desc_postsync(sc, rxq, rxq->rxq_first, 1227 rxq->rxq_last - rxq->rxq_first); 1228 1229 /* 1230 * Make sure we own all descriptors in the ring. 1231 */ 1232 struct gmac_rxdb *rxdb; 1233 for (rxdb = rxq->rxq_first; rxdb < rxq->rxq_last - 1; rxdb++) { 1234 rxdb->rxdb_flags = htole32(RXDB_FLAG_IC); 1235 } 1236 1237 /* 1238 * Last descriptor has the wrap flag. 1239 */ 1240 rxdb->rxdb_flags = htole32(RXDB_FLAG_ET|RXDB_FLAG_IC); 1241 1242 /* 1243 * Reset the producer consumer indexes. 1244 */ 1245 rxq->rxq_consumer = rxq->rxq_first; 1246 rxq->rxq_producer = rxq->rxq_first; 1247 rxq->rxq_inuse = 0; 1248 if (rxq->rxq_threshold < BCMETH_MINRXMBUFS) 1249 rxq->rxq_threshold = BCMETH_MINRXMBUFS; 1250 1251 sc->sc_intmask |= RCVINT|RCVFIFOOF|RCVDESCUF; 1252 1253 /* 1254 * Restart the receiver at the first descriptor 1255 */ 1256 bcmeth_write_4(sc, rxq->rxq_reg_rcvaddrlo, 1257 rxq->rxq_descmap->dm_segs[0].ds_addr); 1258 } 1259 1260 static int 1261 bcmeth_rxq_attach( 1262 struct bcmeth_softc *sc, 1263 struct bcmeth_rxqueue *rxq, 1264 u_int qno) 1265 { 1266 size_t desc_count = BCMETH_RINGSIZE / sizeof(rxq->rxq_first[0]); 1267 int error; 1268 void *descs; 1269 1270 KASSERT(desc_count == 256 || desc_count == 512); 1271 1272 error = bcmeth_dmamem_alloc(sc->sc_dmat, BCMETH_RINGSIZE, 1273 &rxq->rxq_descmap_seg, &rxq->rxq_descmap, &descs); 1274 if (error) 1275 return error; 1276 1277 memset(descs, 0, BCMETH_RINGSIZE); 1278 rxq->rxq_first = descs; 1279 rxq->rxq_last = rxq->rxq_first + desc_count; 1280 rxq->rxq_consumer = descs; 1281 rxq->rxq_producer = descs; 1282 1283 bcmeth_rxq_purge(sc, rxq, true); 1284 bcmeth_rxq_reset(sc, rxq); 1285 1286 rxq->rxq_reg_rcvaddrlo = GMAC_RCVADDR_LOW; 1287 rxq->rxq_reg_rcvctl = GMAC_RCVCONTROL; 1288 rxq->rxq_reg_rcvptr = GMAC_RCVPTR; 1289 rxq->rxq_reg_rcvsts0 = GMAC_RCVSTATUS0; 1290 rxq->rxq_reg_rcvsts1 = GMAC_RCVSTATUS1; 1291 1292 return 0; 1293 } 1294 1295 static bool 1296 bcmeth_txq_active_p( 1297 struct bcmeth_softc * const sc, 1298 struct bcmeth_txqueue *txq) 1299 { 1300 return !IF_IS_EMPTY(&txq->txq_mbufs); 1301 } 1302 1303 static bool 1304 bcmeth_txq_fillable_p( 1305 struct bcmeth_softc * const sc, 1306 struct bcmeth_txqueue *txq) 1307 { 1308 return txq->txq_free >= txq->txq_threshold; 1309 } 1310 1311 static int 1312 bcmeth_txq_attach( 1313 struct bcmeth_softc *sc, 1314 struct bcmeth_txqueue *txq, 1315 u_int qno) 1316 { 1317 size_t desc_count = BCMETH_RINGSIZE / sizeof(txq->txq_first[0]); 1318 int error; 1319 void *descs; 1320 1321 KASSERT(desc_count == 256 || desc_count == 512); 1322 1323 error = bcmeth_dmamem_alloc(sc->sc_dmat, BCMETH_RINGSIZE, 1324 &txq->txq_descmap_seg, &txq->txq_descmap, &descs); 1325 if (error) 1326 return error; 1327 1328 memset(descs, 0, BCMETH_RINGSIZE); 1329 txq->txq_first = descs; 1330 txq->txq_last = txq->txq_first + desc_count; 1331 txq->txq_consumer = descs; 1332 txq->txq_producer = descs; 1333 1334 IFQ_SET_MAXLEN(&txq->txq_mbufs, BCMETH_MAXTXMBUFS); 1335 1336 txq->txq_reg_xmtaddrlo = GMAC_XMTADDR_LOW; 1337 txq->txq_reg_xmtctl = GMAC_XMTCONTROL; 1338 txq->txq_reg_xmtptr = GMAC_XMTPTR; 1339 txq->txq_reg_xmtsts0 = GMAC_XMTSTATUS0; 1340 txq->txq_reg_xmtsts1 = GMAC_XMTSTATUS1; 1341 1342 bcmeth_txq_reset(sc, txq); 1343 1344 return 0; 1345 } 1346 1347 static int 1348 bcmeth_txq_map_load( 1349 struct bcmeth_softc *sc, 1350 struct bcmeth_txqueue *txq, 1351 struct mbuf *m) 1352 { 1353 bus_dmamap_t map; 1354 int error; 1355 1356 map = M_GETCTX(m, bus_dmamap_t); 1357 if (map != NULL) 1358 return 0; 1359 1360 map = bcmeth_mapcache_get(sc, sc->sc_tx_mapcache); 1361 if (map == NULL) 1362 return ENOMEM; 1363 1364 error = bus_dmamap_load_mbuf(sc->sc_dmat, map, m, 1365 BUS_DMA_WRITE | BUS_DMA_NOWAIT); 1366 if (error) 1367 return error; 1368 1369 bus_dmamap_sync(sc->sc_dmat, map, 0, m->m_pkthdr.len, 1370 BUS_DMASYNC_PREWRITE); 1371 M_SETCTX(m, map); 1372 return 0; 1373 } 1374 1375 static void 1376 bcmeth_txq_map_unload( 1377 struct bcmeth_softc *sc, 1378 struct bcmeth_txqueue *txq, 1379 struct mbuf *m) 1380 { 1381 KASSERT(m); 1382 bus_dmamap_t map = M_GETCTX(m, bus_dmamap_t); 1383 bus_dmamap_sync(sc->sc_dmat, map, 0, map->dm_mapsize, 1384 BUS_DMASYNC_POSTWRITE); 1385 bus_dmamap_unload(sc->sc_dmat, map); 1386 bcmeth_mapcache_put(sc, sc->sc_tx_mapcache, map); 1387 } 1388 1389 static bool 1390 bcmeth_txq_produce( 1391 struct bcmeth_softc *sc, 1392 struct bcmeth_txqueue *txq, 1393 struct mbuf *m) 1394 { 1395 bus_dmamap_t map = M_GETCTX(m, bus_dmamap_t); 1396 1397 if (map->dm_nsegs > txq->txq_free) 1398 return false; 1399 1400 /* 1401 * TCP Offload flag must be set in the first descriptor. 1402 */ 1403 struct gmac_txdb *producer = txq->txq_producer; 1404 uint32_t first_flags = TXDB_FLAG_SF; 1405 uint32_t last_flags = TXDB_FLAG_EF; 1406 1407 /* 1408 * If we've produced enough descriptors without consuming any 1409 * we need to ask for an interrupt to reclaim some. 1410 */ 1411 txq->txq_lastintr += map->dm_nsegs; 1412 if (txq->txq_lastintr >= txq->txq_threshold 1413 || txq->txq_mbufs.ifq_len + 1 == txq->txq_mbufs.ifq_maxlen) { 1414 txq->txq_lastintr = 0; 1415 last_flags |= TXDB_FLAG_IC; 1416 } 1417 1418 KASSERT(producer != txq->txq_last); 1419 1420 struct gmac_txdb *start = producer; 1421 size_t count = map->dm_nsegs; 1422 producer->txdb_flags |= htole32(first_flags); 1423 producer->txdb_addrlo = htole32(map->dm_segs[0].ds_addr); 1424 producer->txdb_buflen = htole32(map->dm_segs[0].ds_len); 1425 for (u_int i = 1; i < map->dm_nsegs; i++) { 1426 #if 0 1427 printf("[%zu]: %#x/%#x/%#x/%#x\n", producer - txq->txq_first, 1428 le32toh(producer->txdb_flags), 1429 le32toh(producer->txdb_buflen), 1430 le32toh(producer->txdb_addrlo), 1431 le32toh(producer->txdb_addrhi)); 1432 #endif 1433 if (__predict_false(++producer == txq->txq_last)) { 1434 bcmeth_txq_desc_presync(sc, txq, start, 1435 txq->txq_last - start); 1436 count -= txq->txq_last - start; 1437 producer = txq->txq_first; 1438 start = txq->txq_first; 1439 } 1440 producer->txdb_addrlo = htole32(map->dm_segs[i].ds_addr); 1441 producer->txdb_buflen = htole32(map->dm_segs[i].ds_len); 1442 } 1443 producer->txdb_flags |= htole32(last_flags); 1444 #if 0 1445 printf("[%zu]: %#x/%#x/%#x/%#x\n", producer - txq->txq_first, 1446 le32toh(producer->txdb_flags), le32toh(producer->txdb_buflen), 1447 le32toh(producer->txdb_addrlo), le32toh(producer->txdb_addrhi)); 1448 #endif 1449 if (count) 1450 bcmeth_txq_desc_presync(sc, txq, start, count); 1451 1452 /* 1453 * Reduce free count by the number of segments we consumed. 1454 */ 1455 txq->txq_free -= map->dm_nsegs; 1456 KASSERT(map->dm_nsegs == 1 || txq->txq_producer != producer); 1457 KASSERT(map->dm_nsegs == 1 || (txq->txq_producer->txdb_flags & htole32(TXDB_FLAG_EF)) == 0); 1458 KASSERT(producer->txdb_flags & htole32(TXDB_FLAG_EF)); 1459 1460 #if 0 1461 printf("%s: mbuf %p: produced a %u byte packet in %u segments (%zd..%zd)\n", 1462 __func__, m, m->m_pkthdr.len, map->dm_nsegs, 1463 txq->txq_producer - txq->txq_first, producer - txq->txq_first); 1464 #endif 1465 1466 if (producer + 1 == txq->txq_last) 1467 txq->txq_producer = txq->txq_first; 1468 else 1469 txq->txq_producer = producer + 1; 1470 IF_ENQUEUE(&txq->txq_mbufs, m); 1471 1472 /* 1473 * Let the transmitter know there's more to do 1474 */ 1475 bcmeth_write_4(sc, txq->txq_reg_xmtptr, 1476 txq->txq_descmap->dm_segs[0].ds_addr 1477 + ((uintptr_t)txq->txq_producer & XMT_LASTDSCR)); 1478 1479 return true; 1480 } 1481 1482 static struct mbuf * 1483 bcmeth_copy_packet(struct mbuf *m) 1484 { 1485 struct mbuf *mext = NULL; 1486 size_t misalignment = 0; 1487 size_t hlen = 0; 1488 1489 for (mext = m; mext != NULL; mext = mext->m_next) { 1490 if (mext->m_flags & M_EXT) { 1491 misalignment = mtod(mext, vaddr_t) & arm_dcache_align; 1492 break; 1493 } 1494 hlen += m->m_len; 1495 } 1496 1497 struct mbuf *n = m->m_next; 1498 if (m != mext && hlen + misalignment <= MHLEN && false) { 1499 KASSERT(m->m_pktdat <= m->m_data && m->m_data <= &m->m_pktdat[MHLEN - m->m_len]); 1500 size_t oldoff = m->m_data - m->m_pktdat; 1501 size_t off; 1502 if (mext == NULL) { 1503 off = (oldoff + hlen > MHLEN) ? 0 : oldoff; 1504 } else { 1505 off = MHLEN - (hlen + misalignment); 1506 } 1507 KASSERT(off + hlen + misalignment <= MHLEN); 1508 if (((oldoff ^ off) & arm_dcache_align) != 0 || off < oldoff) { 1509 memmove(&m->m_pktdat[off], m->m_data, m->m_len); 1510 m->m_data = &m->m_pktdat[off]; 1511 } 1512 m_copydata(n, 0, hlen - m->m_len, &m->m_data[m->m_len]); 1513 m->m_len = hlen; 1514 m->m_next = mext; 1515 while (n != mext) { 1516 n = m_free(n); 1517 } 1518 return m; 1519 } 1520 1521 struct mbuf *m0 = m_gethdr(M_DONTWAIT, m->m_type); 1522 if (m0 == NULL) { 1523 return NULL; 1524 } 1525 M_COPY_PKTHDR(m0, m); 1526 MCLAIM(m0, m->m_owner); 1527 if (m0->m_pkthdr.len > MHLEN) { 1528 MCLGET(m0, M_DONTWAIT); 1529 if ((m0->m_flags & M_EXT) == 0) { 1530 m_freem(m0); 1531 return NULL; 1532 } 1533 } 1534 m0->m_len = m->m_pkthdr.len; 1535 m_copydata(m, 0, m0->m_len, mtod(m0, void *)); 1536 m_freem(m); 1537 return m0; 1538 } 1539 1540 static bool 1541 bcmeth_txq_enqueue( 1542 struct bcmeth_softc *sc, 1543 struct bcmeth_txqueue *txq) 1544 { 1545 for (;;) { 1546 if (IF_QFULL(&txq->txq_mbufs)) 1547 return false; 1548 struct mbuf *m = txq->txq_next; 1549 if (m == NULL) { 1550 int s = splnet(); 1551 IF_DEQUEUE(&sc->sc_if.if_snd, m); 1552 splx(s); 1553 if (m == NULL) 1554 return true; 1555 M_SETCTX(m, NULL); 1556 } else { 1557 txq->txq_next = NULL; 1558 } 1559 /* 1560 * If LINK2 is set and this packet uses multiple mbufs, 1561 * consolidate it into a single mbuf. 1562 */ 1563 if (m->m_next != NULL && (sc->sc_if.if_flags & IFF_LINK2)) { 1564 struct mbuf *m0 = bcmeth_copy_packet(m); 1565 if (m0 == NULL) { 1566 txq->txq_next = m; 1567 return true; 1568 } 1569 m = m0; 1570 } 1571 int error = bcmeth_txq_map_load(sc, txq, m); 1572 if (error) { 1573 aprint_error_dev(sc->sc_dev, 1574 "discarded packet due to " 1575 "dmamap load failure: %d\n", error); 1576 m_freem(m); 1577 continue; 1578 } 1579 KASSERT(txq->txq_next == NULL); 1580 if (!bcmeth_txq_produce(sc, txq, m)) { 1581 txq->txq_next = m; 1582 return false; 1583 } 1584 KASSERT(txq->txq_next == NULL); 1585 } 1586 } 1587 1588 static bool 1589 bcmeth_txq_consume( 1590 struct bcmeth_softc *sc, 1591 struct bcmeth_txqueue *txq) 1592 { 1593 struct ifnet * const ifp = &sc->sc_if; 1594 struct gmac_txdb *consumer = txq->txq_consumer; 1595 size_t txfree = 0; 1596 1597 #if 0 1598 printf("%s: entry: free=%zu\n", __func__, txq->txq_free); 1599 #endif 1600 1601 for (;;) { 1602 if (consumer == txq->txq_producer) { 1603 txq->txq_consumer = consumer; 1604 txq->txq_free += txfree; 1605 txq->txq_lastintr -= min(txq->txq_lastintr, txfree); 1606 #if 0 1607 printf("%s: empty: freed %zu descriptors going from %zu to %zu\n", 1608 __func__, txfree, txq->txq_free - txfree, txq->txq_free); 1609 #endif 1610 KASSERT(txq->txq_lastintr == 0); 1611 KASSERT(txq->txq_free == txq->txq_last - txq->txq_first - 1); 1612 return true; 1613 } 1614 bcmeth_txq_desc_postsync(sc, txq, consumer, 1); 1615 uint32_t s0 = bcmeth_read_4(sc, txq->txq_reg_xmtsts0); 1616 if (consumer == txq->txq_first + __SHIFTOUT(s0, XMT_CURRDSCR)) { 1617 txq->txq_consumer = consumer; 1618 txq->txq_free += txfree; 1619 txq->txq_lastintr -= min(txq->txq_lastintr, txfree); 1620 #if 0 1621 printf("%s: freed %zu descriptors\n", 1622 __func__, txfree); 1623 #endif 1624 return bcmeth_txq_fillable_p(sc, txq); 1625 } 1626 1627 /* 1628 * If this is the last descriptor in the chain, get the 1629 * mbuf, free its dmamap, and free the mbuf chain itself. 1630 */ 1631 const uint32_t txdb_flags = le32toh(consumer->txdb_flags); 1632 if (txdb_flags & TXDB_FLAG_EF) { 1633 struct mbuf *m; 1634 1635 IF_DEQUEUE(&txq->txq_mbufs, m); 1636 KASSERT(m); 1637 bcmeth_txq_map_unload(sc, txq, m); 1638 #if 0 1639 printf("%s: mbuf %p: consumed a %u byte packet\n", 1640 __func__, m, m->m_pkthdr.len); 1641 #endif 1642 bpf_mtap(ifp, m); 1643 ifp->if_opackets++; 1644 ifp->if_obytes += m->m_pkthdr.len; 1645 if (m->m_flags & M_MCAST) 1646 ifp->if_omcasts++; 1647 m_freem(m); 1648 } 1649 1650 /* 1651 * We own this packet again. Clear all flags except wrap. 1652 */ 1653 txfree++; 1654 1655 /* 1656 * Wrap at the last entry! 1657 */ 1658 if (txdb_flags & TXDB_FLAG_ET) { 1659 consumer->txdb_flags = htole32(TXDB_FLAG_ET); 1660 KASSERT(consumer + 1 == txq->txq_last); 1661 consumer = txq->txq_first; 1662 } else { 1663 consumer->txdb_flags = 0; 1664 consumer++; 1665 KASSERT(consumer < txq->txq_last); 1666 } 1667 } 1668 } 1669 1670 static void 1671 bcmeth_txq_purge( 1672 struct bcmeth_softc *sc, 1673 struct bcmeth_txqueue *txq) 1674 { 1675 struct mbuf *m; 1676 KASSERT((bcmeth_read_4(sc, UNIMAC_COMMAND_CONFIG) & TX_ENA) == 0); 1677 1678 for (;;) { 1679 IF_DEQUEUE(&txq->txq_mbufs, m); 1680 if (m == NULL) 1681 break; 1682 bcmeth_txq_map_unload(sc, txq, m); 1683 m_freem(m); 1684 } 1685 if ((m = txq->txq_next) != NULL) { 1686 txq->txq_next = NULL; 1687 bcmeth_txq_map_unload(sc, txq, m); 1688 m_freem(m); 1689 } 1690 } 1691 1692 static void 1693 bcmeth_txq_reset( 1694 struct bcmeth_softc *sc, 1695 struct bcmeth_txqueue *txq) 1696 { 1697 /* 1698 * sync all the descriptors 1699 */ 1700 bcmeth_txq_desc_postsync(sc, txq, txq->txq_first, 1701 txq->txq_last - txq->txq_first); 1702 1703 /* 1704 * Make sure we own all descriptors in the ring. 1705 */ 1706 struct gmac_txdb *txdb; 1707 for (txdb = txq->txq_first; txdb < txq->txq_last - 1; txdb++) { 1708 txdb->txdb_flags = 0; 1709 } 1710 1711 /* 1712 * Last descriptor has the wrap flag. 1713 */ 1714 txdb->txdb_flags = htole32(TXDB_FLAG_ET); 1715 1716 /* 1717 * Reset the producer consumer indexes. 1718 */ 1719 txq->txq_consumer = txq->txq_first; 1720 txq->txq_producer = txq->txq_first; 1721 txq->txq_free = txq->txq_last - txq->txq_first - 1; 1722 txq->txq_threshold = txq->txq_free / 2; 1723 txq->txq_lastintr = 0; 1724 1725 /* 1726 * What do we want to get interrupted on? 1727 */ 1728 sc->sc_intmask |= XMTINT_0 | XMTUF; 1729 1730 /* 1731 * Restart the transmiter at the first descriptor 1732 */ 1733 bcmeth_write_4(sc, txq->txq_reg_xmtaddrlo, 1734 txq->txq_descmap->dm_segs->ds_addr); 1735 } 1736 1737 static void 1738 bcmeth_ifstart(struct ifnet *ifp) 1739 { 1740 struct bcmeth_softc * const sc = ifp->if_softc; 1741 1742 if (__predict_false((ifp->if_flags & IFF_RUNNING) == 0)) { 1743 return; 1744 } 1745 1746 #ifdef BCMETH_MPSAFETX 1747 if (cpu_intr_p()) { 1748 #endif 1749 atomic_or_uint(&sc->sc_soft_flags, SOFT_TXINTR); 1750 softint_schedule(sc->sc_soft_ih); 1751 #ifdef BCMETH_MPSAFETX 1752 } else { 1753 /* 1754 * Either we are in a softintr thread already or some other 1755 * thread so just borrow it to do the send and save ourselves 1756 * the overhead of a fast soft int. 1757 */ 1758 bcmeth_soft_txintr(sc); 1759 } 1760 #endif 1761 } 1762 1763 int 1764 bcmeth_intr(void *arg) 1765 { 1766 struct bcmeth_softc * const sc = arg; 1767 uint32_t soft_flags = 0; 1768 uint32_t work_flags = 0; 1769 int rv = 0; 1770 1771 mutex_enter(sc->sc_hwlock); 1772 1773 uint32_t intmask = sc->sc_intmask; 1774 BCMETH_EVCNT_INCR(sc->sc_ev_intr); 1775 1776 for (;;) { 1777 uint32_t intstatus = bcmeth_read_4(sc, GMAC_INTSTATUS); 1778 intstatus &= intmask; 1779 bcmeth_write_4(sc, GMAC_INTSTATUS, intstatus); /* write 1 to clear */ 1780 if (intstatus == 0) { 1781 break; 1782 } 1783 #if 0 1784 aprint_normal_dev(sc->sc_dev, "%s: intstatus=%#x intmask=%#x\n", 1785 __func__, intstatus, bcmeth_read_4(sc, GMAC_INTMASK)); 1786 #endif 1787 if (intstatus & RCVINT) { 1788 struct bcmeth_rxqueue * const rxq = &sc->sc_rxq; 1789 intmask &= ~RCVINT; 1790 1791 uint32_t rcvsts0 = bcmeth_read_4(sc, rxq->rxq_reg_rcvsts0); 1792 uint32_t descs = __SHIFTOUT(rcvsts0, RCV_CURRDSCR); 1793 if (descs < rxq->rxq_consumer - rxq->rxq_first) { 1794 /* 1795 * We wrapped at the end so count how far 1796 * we are from the end. 1797 */ 1798 descs += rxq->rxq_last - rxq->rxq_consumer; 1799 } else { 1800 descs -= rxq->rxq_consumer - rxq->rxq_first; 1801 } 1802 /* 1803 * If we "timedout" we can't be hogging so use 1804 * softints. If we exceeded then we might hogging 1805 * so let the workqueue deal with them. 1806 */ 1807 const uint32_t framecount = __SHIFTOUT(sc->sc_rcvlazy, INTRCVLAZY_FRAMECOUNT); 1808 if (descs < framecount 1809 || (curcpu()->ci_curlwp->l_flag & LW_IDLE)) { 1810 soft_flags |= SOFT_RXINTR; 1811 } else { 1812 work_flags |= WORK_RXINTR; 1813 } 1814 } 1815 1816 if (intstatus & XMTINT_0) { 1817 intmask &= ~XMTINT_0; 1818 soft_flags |= SOFT_TXINTR; 1819 } 1820 1821 if (intstatus & RCVDESCUF) { 1822 intmask &= ~RCVDESCUF; 1823 work_flags |= WORK_RXUNDERFLOW; 1824 } 1825 1826 intstatus &= intmask; 1827 if (intstatus) { 1828 aprint_error_dev(sc->sc_dev, 1829 "intr: intstatus=%#x\n", intstatus); 1830 aprint_error_dev(sc->sc_dev, 1831 "rcvbase=%p/%#lx rcvptr=%#x rcvsts=%#x/%#x\n", 1832 sc->sc_rxq.rxq_first, 1833 sc->sc_rxq.rxq_descmap->dm_segs[0].ds_addr, 1834 bcmeth_read_4(sc, sc->sc_rxq.rxq_reg_rcvptr), 1835 bcmeth_read_4(sc, sc->sc_rxq.rxq_reg_rcvsts0), 1836 bcmeth_read_4(sc, sc->sc_rxq.rxq_reg_rcvsts1)); 1837 aprint_error_dev(sc->sc_dev, 1838 "xmtbase=%p/%#lx xmtptr=%#x xmtsts=%#x/%#x\n", 1839 sc->sc_txq.txq_first, 1840 sc->sc_txq.txq_descmap->dm_segs[0].ds_addr, 1841 bcmeth_read_4(sc, sc->sc_txq.txq_reg_xmtptr), 1842 bcmeth_read_4(sc, sc->sc_txq.txq_reg_xmtsts0), 1843 bcmeth_read_4(sc, sc->sc_txq.txq_reg_xmtsts1)); 1844 intmask &= ~intstatus; 1845 work_flags |= WORK_REINIT; 1846 break; 1847 } 1848 } 1849 1850 if (intmask != sc->sc_intmask) { 1851 bcmeth_write_4(sc, GMAC_INTMASK, sc->sc_intmask); 1852 } 1853 1854 if (work_flags) { 1855 if (sc->sc_work_flags == 0) { 1856 workqueue_enqueue(sc->sc_workq, &sc->sc_work, NULL); 1857 } 1858 atomic_or_32(&sc->sc_work_flags, work_flags); 1859 rv = 1; 1860 } 1861 1862 if (soft_flags) { 1863 if (sc->sc_soft_flags == 0) { 1864 softint_schedule(sc->sc_soft_ih); 1865 } 1866 atomic_or_32(&sc->sc_soft_flags, soft_flags); 1867 rv = 1; 1868 } 1869 1870 mutex_exit(sc->sc_hwlock); 1871 1872 return rv; 1873 } 1874 1875 #ifdef BCMETH_MPSAFETX 1876 void 1877 bcmeth_soft_txintr(struct bcmeth_softc *sc) 1878 { 1879 mutex_enter(sc->sc_lock); 1880 /* 1881 * Let's do what we came here for. Consume transmitted 1882 * packets off the the transmit ring. 1883 */ 1884 if (!bcmeth_txq_consume(sc, &sc->sc_txq) 1885 || !bcmeth_txq_enqueue(sc, &sc->sc_txq)) { 1886 BCMETH_EVCNT_INCR(sc->sc_ev_tx_stall); 1887 sc->sc_if.if_flags |= IFF_OACTIVE; 1888 } else { 1889 sc->sc_if.if_flags &= ~IFF_OACTIVE; 1890 } 1891 if (sc->sc_if.if_flags & IFF_RUNNING) { 1892 mutex_spin_enter(sc->sc_hwlock); 1893 sc->sc_intmask |= XMTINT_0; 1894 bcmeth_write_4(sc, GMAC_INTMASK, sc->sc_intmask); 1895 mutex_spin_exit(sc->sc_hwlock); 1896 } 1897 mutex_exit(sc->sc_lock); 1898 } 1899 #endif /* BCMETH_MPSAFETX */ 1900 1901 void 1902 bcmeth_soft_intr(void *arg) 1903 { 1904 struct bcmeth_softc * const sc = arg; 1905 struct ifnet * const ifp = &sc->sc_if; 1906 uint32_t intmask = 0; 1907 1908 mutex_enter(sc->sc_lock); 1909 1910 u_int soft_flags = atomic_swap_uint(&sc->sc_soft_flags, 0); 1911 1912 BCMETH_EVCNT_INCR(sc->sc_ev_soft_intr); 1913 1914 if ((soft_flags & SOFT_TXINTR) 1915 || bcmeth_txq_active_p(sc, &sc->sc_txq)) { 1916 /* 1917 * Let's do what we came here for. Consume transmitted 1918 * packets off the the transmit ring. 1919 */ 1920 if (!bcmeth_txq_consume(sc, &sc->sc_txq) 1921 || !bcmeth_txq_enqueue(sc, &sc->sc_txq)) { 1922 BCMETH_EVCNT_INCR(sc->sc_ev_tx_stall); 1923 ifp->if_flags |= IFF_OACTIVE; 1924 } else { 1925 ifp->if_flags &= ~IFF_OACTIVE; 1926 } 1927 intmask |= XMTINT_0; 1928 } 1929 1930 if (soft_flags & SOFT_RXINTR) { 1931 /* 1932 * Let's consume 1933 */ 1934 while (bcmeth_rxq_consume(sc, &sc->sc_rxq, 1935 sc->sc_rxq.rxq_threshold / 4)) { 1936 /* 1937 * We've consumed a quarter of the ring and still have 1938 * more to do. Refill the ring. 1939 */ 1940 bcmeth_rxq_produce(sc, &sc->sc_rxq); 1941 } 1942 intmask |= RCVINT; 1943 } 1944 1945 if (ifp->if_flags & IFF_RUNNING) { 1946 bcmeth_rxq_produce(sc, &sc->sc_rxq); 1947 mutex_spin_enter(sc->sc_hwlock); 1948 sc->sc_intmask |= intmask; 1949 bcmeth_write_4(sc, GMAC_INTMASK, sc->sc_intmask); 1950 mutex_spin_exit(sc->sc_hwlock); 1951 } 1952 1953 mutex_exit(sc->sc_lock); 1954 } 1955 1956 void 1957 bcmeth_worker(struct work *wk, void *arg) 1958 { 1959 struct bcmeth_softc * const sc = arg; 1960 struct ifnet * const ifp = &sc->sc_if; 1961 uint32_t intmask = 0; 1962 1963 mutex_enter(sc->sc_lock); 1964 1965 BCMETH_EVCNT_INCR(sc->sc_ev_work); 1966 1967 uint32_t work_flags = atomic_swap_32(&sc->sc_work_flags, 0); 1968 if (work_flags & WORK_REINIT) { 1969 int s = splnet(); 1970 sc->sc_soft_flags = 0; 1971 bcmeth_ifinit(ifp); 1972 splx(s); 1973 work_flags &= ~WORK_RXUNDERFLOW; 1974 } 1975 1976 if (work_flags & WORK_RXUNDERFLOW) { 1977 struct bcmeth_rxqueue * const rxq = &sc->sc_rxq; 1978 size_t threshold = 5 * rxq->rxq_threshold / 4; 1979 if (threshold >= rxq->rxq_last - rxq->rxq_first) { 1980 threshold = rxq->rxq_last - rxq->rxq_first - 1; 1981 } else { 1982 intmask |= RCVDESCUF; 1983 } 1984 aprint_normal_dev(sc->sc_dev, 1985 "increasing receive buffers from %zu to %zu\n", 1986 rxq->rxq_threshold, threshold); 1987 rxq->rxq_threshold = threshold; 1988 } 1989 1990 if (work_flags & WORK_RXINTR) { 1991 /* 1992 * Let's consume 1993 */ 1994 while (bcmeth_rxq_consume(sc, &sc->sc_rxq, 1995 sc->sc_rxq.rxq_threshold / 4)) { 1996 /* 1997 * We've consumed a quarter of the ring and still have 1998 * more to do. Refill the ring. 1999 */ 2000 bcmeth_rxq_produce(sc, &sc->sc_rxq); 2001 } 2002 intmask |= RCVINT; 2003 } 2004 2005 if (ifp->if_flags & IFF_RUNNING) { 2006 bcmeth_rxq_produce(sc, &sc->sc_rxq); 2007 #if 0 2008 uint32_t intstatus = bcmeth_read_4(sc, GMAC_INTSTATUS); 2009 if (intstatus & RCVINT) { 2010 bcmeth_write_4(sc, GMAC_INTSTATUS, RCVINT); 2011 work_flags |= WORK_RXINTR; 2012 continue; 2013 } 2014 #endif 2015 mutex_spin_enter(sc->sc_hwlock); 2016 sc->sc_intmask |= intmask; 2017 bcmeth_write_4(sc, GMAC_INTMASK, sc->sc_intmask); 2018 mutex_spin_exit(sc->sc_hwlock); 2019 } 2020 2021 mutex_exit(sc->sc_lock); 2022 } 2023
Indexes created Tue Sep 30 07:10:03 GMT 2025