bcm53xx_eth.c revision 1.23
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 1.23 2013/01/19 00:35:24 matt 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/broadcom/bcm53xx_reg.h> 63 #include <arm/broadcom/bcm53xx_var.h> 64 65 //#define BCMETH_MPSAFE 66 67 #ifdef BCMETH_COUNTERS 68 #define BCMETH_EVCNT_ADD(a,b) ((void)((a).ev_count += (b))) 69 #else 70 #define BCMETH_EVCNT_ADD(a,b) do { } while (/*CONSTCOND*/0) 71 #endif 72 #define BCMETH_EVCNT_INCR(a) BCMETH_EVCNT_ADD((a), 1) 73 74 #define BCMETH_MAXTXMBUFS 128 75 #define BCMETH_NTXSEGS 30 76 #define BCMETH_MAXRXMBUFS 255 77 #define BCMETH_MINRXMBUFS 64 78 #define BCMETH_NRXSEGS 1 79 #define BCMETH_RINGSIZE PAGE_SIZE 80 81 #if 1 82 #define BCMETH_RCVMAGIC 0xfeedface 83 #endif 84 85 static int bcmeth_ccb_match(device_t, cfdata_t, void *); 86 static void bcmeth_ccb_attach(device_t, device_t, void *); 87 88 struct bcmeth_txqueue { 89 bus_dmamap_t txq_descmap; 90 struct gmac_txdb *txq_consumer; 91 struct gmac_txdb *txq_producer; 92 struct gmac_txdb *txq_first; 93 struct gmac_txdb *txq_last; 94 struct ifqueue txq_mbufs; 95 struct mbuf *txq_next; 96 size_t txq_free; 97 size_t txq_threshold; 98 size_t txq_lastintr; 99 bus_size_t txq_reg_xmtaddrlo; 100 bus_size_t txq_reg_xmtptr; 101 bus_size_t txq_reg_xmtctl; 102 bus_size_t txq_reg_xmtsts0; 103 bus_size_t txq_reg_xmtsts1; 104 bus_dma_segment_t txq_descmap_seg; 105 }; 106 107 struct bcmeth_rxqueue { 108 bus_dmamap_t rxq_descmap; 109 struct gmac_rxdb *rxq_consumer; 110 struct gmac_rxdb *rxq_producer; 111 struct gmac_rxdb *rxq_first; 112 struct gmac_rxdb *rxq_last; 113 struct mbuf *rxq_mhead; 114 struct mbuf **rxq_mtail; 115 struct mbuf *rxq_mconsumer; 116 size_t rxq_inuse; 117 size_t rxq_threshold; 118 bus_size_t rxq_reg_rcvaddrlo; 119 bus_size_t rxq_reg_rcvptr; 120 bus_size_t rxq_reg_rcvctl; 121 bus_size_t rxq_reg_rcvsts0; 122 bus_size_t rxq_reg_rcvsts1; 123 bus_dma_segment_t rxq_descmap_seg; 124 }; 125 126 struct bcmeth_mapcache { 127 u_int dmc_nmaps; 128 u_int dmc_maxseg; 129 u_int dmc_maxmaps; 130 u_int dmc_maxmapsize; 131 bus_dmamap_t dmc_maps[0]; 132 }; 133 134 struct bcmeth_softc { 135 device_t sc_dev; 136 bus_space_tag_t sc_bst; 137 bus_space_handle_t sc_bsh; 138 bus_dma_tag_t sc_dmat; 139 kmutex_t *sc_lock; 140 kmutex_t *sc_hwlock; 141 struct ethercom sc_ec; 142 #define sc_if sc_ec.ec_if 143 struct ifmedia sc_media; 144 void *sc_soft_ih; 145 void *sc_ih; 146 147 struct bcmeth_rxqueue sc_rxq; 148 struct bcmeth_txqueue sc_txq; 149 150 size_t sc_rcvoffset; 151 uint32_t sc_macaddr[2]; 152 uint32_t sc_maxfrm; 153 uint32_t sc_cmdcfg; 154 uint32_t sc_intmask; 155 uint32_t sc_rcvlazy; 156 volatile uint32_t sc_soft_flags; 157 #define SOFT_RXINTR 0x01 158 #define SOFT_TXINTR 0x02 159 160 #ifdef BCMETH_COUNTERS 161 struct evcnt sc_ev_intr; 162 struct evcnt sc_ev_soft_intr; 163 struct evcnt sc_ev_work; 164 struct evcnt sc_ev_tx_stall; 165 struct evcnt sc_ev_rx_badmagic_lo; 166 struct evcnt sc_ev_rx_badmagic_hi; 167 #endif 168 169 struct ifqueue sc_rx_bufcache; 170 struct bcmeth_mapcache *sc_rx_mapcache; 171 struct bcmeth_mapcache *sc_tx_mapcache; 172 173 struct workqueue *sc_workq; 174 struct work sc_work; 175 176 volatile uint32_t sc_work_flags; 177 #define WORK_RXINTR 0x01 178 #define WORK_RXUNDERFLOW 0x02 179 #define WORK_REINIT 0x04 180 181 uint8_t sc_enaddr[ETHER_ADDR_LEN]; 182 }; 183 184 static void bcmeth_ifstart(struct ifnet *); 185 static void bcmeth_ifwatchdog(struct ifnet *); 186 static int bcmeth_ifinit(struct ifnet *); 187 static void bcmeth_ifstop(struct ifnet *, int); 188 static int bcmeth_ifioctl(struct ifnet *, u_long, void *); 189 190 static int bcmeth_mapcache_create(struct bcmeth_softc *, 191 struct bcmeth_mapcache **, size_t, size_t, size_t); 192 static void bcmeth_mapcache_destroy(struct bcmeth_softc *, 193 struct bcmeth_mapcache *); 194 static bus_dmamap_t bcmeth_mapcache_get(struct bcmeth_softc *, 195 struct bcmeth_mapcache *); 196 static void bcmeth_mapcache_put(struct bcmeth_softc *, 197 struct bcmeth_mapcache *, bus_dmamap_t); 198 199 static int bcmeth_txq_attach(struct bcmeth_softc *, 200 struct bcmeth_txqueue *, u_int); 201 static void bcmeth_txq_purge(struct bcmeth_softc *, 202 struct bcmeth_txqueue *); 203 static void bcmeth_txq_reset(struct bcmeth_softc *, 204 struct bcmeth_txqueue *); 205 static bool bcmeth_txq_consume(struct bcmeth_softc *, 206 struct bcmeth_txqueue *); 207 static bool bcmeth_txq_produce(struct bcmeth_softc *, 208 struct bcmeth_txqueue *, struct mbuf *m); 209 static bool bcmeth_txq_active_p(struct bcmeth_softc *, 210 struct bcmeth_txqueue *); 211 212 static int bcmeth_rxq_attach(struct bcmeth_softc *, 213 struct bcmeth_rxqueue *, u_int); 214 static bool bcmeth_rxq_produce(struct bcmeth_softc *, 215 struct bcmeth_rxqueue *); 216 static void bcmeth_rxq_purge(struct bcmeth_softc *, 217 struct bcmeth_rxqueue *, bool); 218 static void bcmeth_rxq_reset(struct bcmeth_softc *, 219 struct bcmeth_rxqueue *); 220 221 static int bcmeth_intr(void *); 222 #ifdef BCMETH_MPSAFETX 223 static void bcmeth_soft_txintr(struct bcmeth_softc *); 224 #endif 225 static void bcmeth_soft_intr(void *); 226 static void bcmeth_worker(struct work *, void *); 227 228 static int bcmeth_mediachange(struct ifnet *); 229 static void bcmeth_mediastatus(struct ifnet *, struct ifmediareq *); 230 231 static inline uint32_t 232 bcmeth_read_4(struct bcmeth_softc *sc, bus_size_t o) 233 { 234 return bus_space_read_4(sc->sc_bst, sc->sc_bsh, o); 235 } 236 237 static inline void 238 bcmeth_write_4(struct bcmeth_softc *sc, bus_size_t o, uint32_t v) 239 { 240 bus_space_write_4(sc->sc_bst, sc->sc_bsh, o, v); 241 } 242 243 CFATTACH_DECL_NEW(bcmeth_ccb, sizeof(struct bcmeth_softc), 244 bcmeth_ccb_match, bcmeth_ccb_attach, NULL, NULL); 245 246 static int 247 bcmeth_ccb_match(device_t parent, cfdata_t cf, void *aux) 248 { 249 struct bcmccb_attach_args * const ccbaa = aux; 250 const struct bcm_locators * const loc = &ccbaa->ccbaa_loc; 251 252 if (strcmp(cf->cf_name, loc->loc_name)) 253 return 0; 254 255 #ifdef DIAGNOSTIC 256 const int port = cf->cf_loc[BCMCCBCF_PORT]; 257 #endif 258 KASSERT(port == BCMCCBCF_PORT_DEFAULT || port == loc->loc_port); 259 260 return 1; 261 } 262 263 static void 264 bcmeth_ccb_attach(device_t parent, device_t self, void *aux) 265 { 266 struct bcmeth_softc * const sc = device_private(self); 267 struct ethercom * const ec = &sc->sc_ec; 268 struct ifnet * const ifp = &ec->ec_if; 269 struct bcmccb_attach_args * const ccbaa = aux; 270 const struct bcm_locators * const loc = &ccbaa->ccbaa_loc; 271 const char * const xname = device_xname(self); 272 prop_dictionary_t dict = device_properties(self); 273 int error; 274 275 sc->sc_bst = ccbaa->ccbaa_ccb_bst; 276 sc->sc_dmat = ccbaa->ccbaa_dmat; 277 bus_space_subregion(sc->sc_bst, ccbaa->ccbaa_ccb_bsh, 278 loc->loc_offset, loc->loc_size, &sc->sc_bsh); 279 280 /* 281 * We need to use the coherent dma tag for the GMAC. 282 */ 283 sc->sc_dmat = &bcm53xx_coherent_dma_tag; 284 285 prop_data_t eaprop = prop_dictionary_get(dict, "mac-address"); 286 if (eaprop == NULL) { 287 uint32_t mac0 = bcmeth_read_4(sc, UNIMAC_MAC_0); 288 uint32_t mac1 = bcmeth_read_4(sc, UNIMAC_MAC_1); 289 if ((mac0 == 0 && mac1 == 0) || (mac1 & 1)) { 290 aprint_error(": mac-address property is missing\n"); 291 return; 292 } 293 sc->sc_enaddr[0] = (mac0 >> 0) & 0xff; 294 sc->sc_enaddr[1] = (mac0 >> 8) & 0xff; 295 sc->sc_enaddr[2] = (mac0 >> 16) & 0xff; 296 sc->sc_enaddr[3] = (mac0 >> 24) & 0xff; 297 sc->sc_enaddr[4] = (mac1 >> 0) & 0xff; 298 sc->sc_enaddr[5] = (mac1 >> 8) & 0xff; 299 } else { 300 KASSERT(prop_object_type(eaprop) == PROP_TYPE_DATA); 301 KASSERT(prop_data_size(eaprop) == ETHER_ADDR_LEN); 302 memcpy(sc->sc_enaddr, prop_data_data_nocopy(eaprop), 303 ETHER_ADDR_LEN); 304 } 305 sc->sc_dev = self; 306 sc->sc_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_SOFTNET); 307 sc->sc_hwlock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_VM); 308 309 bcmeth_write_4(sc, GMAC_INTMASK, 0); // disable interrupts 310 311 aprint_naive("\n"); 312 aprint_normal(": Gigabit Ethernet Controller\n"); 313 314 error = bcmeth_rxq_attach(sc, &sc->sc_rxq, 0); 315 if (error) { 316 aprint_error(": failed to init rxq: %d\n", error); 317 return; 318 } 319 320 error = bcmeth_txq_attach(sc, &sc->sc_txq, 0); 321 if (error) { 322 aprint_error(": failed to init txq: %d\n", error); 323 return; 324 } 325 326 error = bcmeth_mapcache_create(sc, &sc->sc_rx_mapcache, 327 BCMETH_MAXRXMBUFS, MCLBYTES, BCMETH_NRXSEGS); 328 if (error) { 329 aprint_error(": failed to allocate rx dmamaps: %d\n", error); 330 return; 331 } 332 333 error = bcmeth_mapcache_create(sc, &sc->sc_tx_mapcache, 334 BCMETH_MAXTXMBUFS, MCLBYTES, BCMETH_NTXSEGS); 335 if (error) { 336 aprint_error(": failed to allocate tx dmamaps: %d\n", error); 337 return; 338 } 339 340 error = workqueue_create(&sc->sc_workq, xname, bcmeth_worker, sc, 341 (PRI_USER + MAXPRI_USER) / 2, IPL_NET, WQ_MPSAFE|WQ_PERCPU); 342 if (error) { 343 aprint_error(": failed to create workqueue: %d\n", error); 344 return; 345 } 346 347 sc->sc_soft_ih = softint_establish(SOFTINT_MPSAFE | SOFTINT_NET, 348 bcmeth_soft_intr, sc); 349 350 sc->sc_ih = intr_establish(loc->loc_intrs[0], IPL_VM, IST_LEVEL, 351 bcmeth_intr, sc); 352 353 if (sc->sc_ih == NULL) { 354 aprint_error_dev(self, "failed to establish interrupt %d\n", 355 loc->loc_intrs[0]); 356 } else { 357 aprint_normal_dev(self, "interrupting on irq %d\n", 358 loc->loc_intrs[0]); 359 } 360 361 aprint_normal_dev(sc->sc_dev, "Ethernet address %s\n", 362 ether_sprintf(sc->sc_enaddr)); 363 364 /* 365 * Since each port in plugged into the switch/flow-accelerator, 366 * we hard code at Gige Full-Duplex with Flow Control enabled. 367 */ 368 int ifmedia = IFM_ETHER|IFM_1000_T|IFM_FDX; 369 //ifmedia |= IFM_FLOW|IFM_ETH_TXPAUSE|IFM_ETH_RXPAUSE; 370 ifmedia_init(&sc->sc_media, IFM_IMASK, bcmeth_mediachange, 371 bcmeth_mediastatus); 372 ifmedia_add(&sc->sc_media, ifmedia, 0, NULL); 373 ifmedia_set(&sc->sc_media, ifmedia); 374 375 ec->ec_capabilities = ETHERCAP_VLAN_MTU | ETHERCAP_JUMBO_MTU; 376 377 strlcpy(ifp->if_xname, xname, IFNAMSIZ); 378 ifp->if_softc = sc; 379 ifp->if_baudrate = IF_Mbps(1000); 380 ifp->if_capabilities = 0; 381 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 382 #ifdef BCMETH_MPSAFE 383 ifp->if_flags2 = IFF2_MPSAFE; 384 #endif 385 ifp->if_ioctl = bcmeth_ifioctl; 386 ifp->if_start = bcmeth_ifstart; 387 ifp->if_watchdog = bcmeth_ifwatchdog; 388 ifp->if_init = bcmeth_ifinit; 389 ifp->if_stop = bcmeth_ifstop; 390 IFQ_SET_READY(&ifp->if_snd); 391 392 bcmeth_ifstop(ifp, true); 393 394 /* 395 * Attach the interface. 396 */ 397 if_attach(ifp); 398 ether_ifattach(ifp, sc->sc_enaddr); 399 400 #ifdef BCMETH_COUNTERS 401 evcnt_attach_dynamic(&sc->sc_ev_intr, EVCNT_TYPE_INTR, 402 NULL, xname, "intr"); 403 evcnt_attach_dynamic(&sc->sc_ev_soft_intr, EVCNT_TYPE_INTR, 404 NULL, xname, "soft intr"); 405 evcnt_attach_dynamic(&sc->sc_ev_work, EVCNT_TYPE_MISC, 406 NULL, xname, "work items"); 407 evcnt_attach_dynamic(&sc->sc_ev_tx_stall, EVCNT_TYPE_MISC, 408 NULL, xname, "tx stalls"); 409 evcnt_attach_dynamic(&sc->sc_ev_rx_badmagic_lo, EVCNT_TYPE_MISC, 410 NULL, xname, "rx badmagic lo"); 411 evcnt_attach_dynamic(&sc->sc_ev_rx_badmagic_hi, EVCNT_TYPE_MISC, 412 NULL, xname, "rx badmagic hi"); 413 #endif 414 } 415 416 static int 417 bcmeth_mediachange(struct ifnet *ifp) 418 { 419 //struct bcmeth_softc * const sc = ifp->if_softc; 420 return 0; 421 } 422 423 static void 424 bcmeth_mediastatus(struct ifnet *ifp, struct ifmediareq *ifm) 425 { 426 //struct bcmeth_softc * const sc = ifp->if_softc; 427 428 ifm->ifm_status = IFM_AVALID | IFM_ACTIVE; 429 ifm->ifm_active = IFM_ETHER | IFM_FDX | IFM_1000_T; 430 } 431 432 static uint64_t 433 bcmeth_macaddr_create(const uint8_t *enaddr) 434 { 435 return (enaddr[3] << 0) // UNIMAC_MAC_0 436 | (enaddr[2] << 8) // UNIMAC_MAC_0 437 | (enaddr[1] << 16) // UNIMAC_MAC_0 438 | ((uint64_t)enaddr[0] << 24) // UNIMAC_MAC_0 439 | ((uint64_t)enaddr[5] << 32) // UNIMAC_MAC_1 440 | ((uint64_t)enaddr[4] << 40); // UNIMAC_MAC_1 441 } 442 443 static int 444 bcmeth_ifinit(struct ifnet *ifp) 445 { 446 struct bcmeth_softc * const sc = ifp->if_softc; 447 int error = 0; 448 449 sc->sc_maxfrm = max(ifp->if_mtu + 32, MCLBYTES); 450 if (ifp->if_mtu > ETHERMTU_JUMBO) 451 return error; 452 453 KASSERT(ifp->if_flags & IFF_UP); 454 455 /* 456 * Stop the interface 457 */ 458 bcmeth_ifstop(ifp, 0); 459 460 /* 461 * Reserve enough space at the front so that we can insert a maxsized 462 * link header and a VLAN tag. Also make sure we have enough room for 463 * the rcvsts field as well. 464 */ 465 KASSERT(ALIGN(max_linkhdr) == max_linkhdr); 466 KASSERTMSG(max_linkhdr > sizeof(struct ether_header), "%u > %zu", 467 max_linkhdr, sizeof(struct ether_header)); 468 sc->sc_rcvoffset = max_linkhdr + 4 - sizeof(struct ether_header); 469 if (sc->sc_rcvoffset <= 4) 470 sc->sc_rcvoffset += 4; 471 KASSERT((sc->sc_rcvoffset & 3) == 2); 472 KASSERT(sc->sc_rcvoffset <= __SHIFTOUT(RCVCTL_RCVOFFSET, RCVCTL_RCVOFFSET)); 473 KASSERT(sc->sc_rcvoffset >= 6); 474 475 /* 476 * If our frame size has changed (or it's our first time through) 477 * destroy the existing transmit mapcache. 478 */ 479 if (sc->sc_tx_mapcache != NULL 480 && sc->sc_maxfrm != sc->sc_tx_mapcache->dmc_maxmapsize) { 481 bcmeth_mapcache_destroy(sc, sc->sc_tx_mapcache); 482 sc->sc_tx_mapcache = NULL; 483 } 484 485 if (sc->sc_tx_mapcache == NULL) { 486 error = bcmeth_mapcache_create(sc, &sc->sc_tx_mapcache, 487 BCMETH_MAXTXMBUFS, sc->sc_maxfrm, BCMETH_NTXSEGS); 488 if (error) 489 return error; 490 } 491 492 sc->sc_cmdcfg = NO_LENGTH_CHECK | PAUSE_IGNORE 493 | __SHIFTIN(ETH_SPEED_1000, ETH_SPEED) 494 | RX_ENA | TX_ENA; 495 496 if (ifp->if_flags & IFF_PROMISC) { 497 sc->sc_cmdcfg |= PROMISC_EN; 498 } else { 499 sc->sc_cmdcfg &= ~PROMISC_EN; 500 } 501 502 const uint8_t * const lladdr = CLLADDR(ifp->if_sadl); 503 const uint64_t macstnaddr = bcmeth_macaddr_create(lladdr); 504 505 /* 506 * We make sure that a received Ethernet packet start on a non-word 507 * boundary so that the packet payload will be on a word boundary. 508 * So to check the destination address we keep around two words to 509 * quickly compare with. 510 */ 511 #if __ARMEL__ 512 sc->sc_macaddr[0] = lladdr[0] | (lladdr[1] << 8); 513 sc->sc_macaddr[1] = lladdr[2] | (lladdr[3] << 8) 514 | (lladdr[4] << 16) | (lladdr[5] << 24); 515 #else 516 sc->sc_macaddr[0] = lladdr[1] | (lladdr[0] << 8); 517 sc->sc_macaddr[1] = lladdr[5] | (lladdr[4] << 8) 518 | (lladdr[1] << 16) | (lladdr[2] << 24); 519 #endif 520 521 sc->sc_intmask = DESCPROTOERR|DATAERR|DESCERR; 522 523 /* 5. Load RCVADDR_LO with new pointer */ 524 bcmeth_rxq_reset(sc, &sc->sc_rxq); 525 526 bcmeth_write_4(sc, sc->sc_rxq.rxq_reg_rcvctl, 527 __SHIFTIN(sc->sc_rcvoffset, RCVCTL_RCVOFFSET) 528 | RCVCTL_PARITY_DIS 529 | RCVCTL_OFLOW_CONTINUE 530 | __SHIFTIN(3, RCVCTL_BURSTLEN)); 531 532 /* 6. Load XMTADDR_LO with new pointer */ 533 bcmeth_txq_reset(sc, &sc->sc_txq); 534 535 bcmeth_write_4(sc, sc->sc_txq.txq_reg_xmtctl, XMTCTL_DMA_ACT_INDEX 536 | XMTCTL_PARITY_DIS 537 | __SHIFTIN(3, XMTCTL_BURSTLEN)); 538 539 /* 7. Setup other UNIMAC registers */ 540 bcmeth_write_4(sc, UNIMAC_FRAME_LEN, sc->sc_maxfrm); 541 bcmeth_write_4(sc, UNIMAC_MAC_0, (uint32_t)(macstnaddr >> 0)); 542 bcmeth_write_4(sc, UNIMAC_MAC_1, (uint32_t)(macstnaddr >> 32)); 543 bcmeth_write_4(sc, UNIMAC_COMMAND_CONFIG, sc->sc_cmdcfg); 544 545 uint32_t devctl = bcmeth_read_4(sc, GMAC_DEVCONTROL); 546 devctl |= RGMII_LINK_STATUS_SEL | NWAY_AUTO_POLL_EN | TXARB_STRICT_MODE; 547 devctl &= ~FLOW_CTRL_MODE; 548 devctl &= ~MIB_RD_RESET_EN; 549 devctl &= ~RXQ_OVERFLOW_CTRL_SEL; 550 devctl &= ~CPU_FLOW_CTRL_ON; 551 bcmeth_write_4(sc, GMAC_DEVCONTROL, devctl); 552 553 /* Setup lazy receive (at most 1ms). */ 554 const struct cpu_softc * const cpu = curcpu()->ci_softc; 555 sc->sc_rcvlazy = __SHIFTIN(4, INTRCVLAZY_FRAMECOUNT) 556 | __SHIFTIN(cpu->cpu_clk.clk_apb / 1000, INTRCVLAZY_TIMEOUT); 557 bcmeth_write_4(sc, GMAC_INTRCVLAZY, sc->sc_rcvlazy); 558 559 /* 11. Enable transmit queues in TQUEUE, and ensure that the transmit scheduling mode is correctly set in TCTRL. */ 560 sc->sc_intmask |= XMTINT_0|XMTUF; 561 bcmeth_write_4(sc, sc->sc_txq.txq_reg_xmtctl, 562 bcmeth_read_4(sc, sc->sc_txq.txq_reg_xmtctl) | XMTCTL_ENABLE); 563 564 565 /* 12. Enable receive queues in RQUEUE, */ 566 sc->sc_intmask |= RCVINT|RCVDESCUF|RCVFIFOOF; 567 bcmeth_write_4(sc, sc->sc_rxq.rxq_reg_rcvctl, 568 bcmeth_read_4(sc, sc->sc_rxq.rxq_reg_rcvctl) | RCVCTL_ENABLE); 569 570 bcmeth_rxq_produce(sc, &sc->sc_rxq); /* fill with rx buffers */ 571 572 #if 0 573 aprint_normal_dev(sc->sc_dev, 574 "devctl=%#x ucmdcfg=%#x xmtctl=%#x rcvctl=%#x\n", 575 devctl, sc->sc_cmdcfg, 576 bcmeth_read_4(sc, sc->sc_txq.txq_reg_xmtctl), 577 bcmeth_read_4(sc, sc->sc_rxq.rxq_reg_rcvctl)); 578 #endif 579 580 sc->sc_soft_flags = 0; 581 582 bcmeth_write_4(sc, GMAC_INTMASK, sc->sc_intmask); 583 584 ifp->if_flags |= IFF_RUNNING; 585 586 return error; 587 } 588 589 static void 590 bcmeth_ifstop(struct ifnet *ifp, int disable) 591 { 592 struct bcmeth_softc * const sc = ifp->if_softc; 593 struct bcmeth_txqueue * const txq = &sc->sc_txq; 594 struct bcmeth_rxqueue * const rxq = &sc->sc_rxq; 595 596 KASSERT(!cpu_intr_p()); 597 598 sc->sc_soft_flags = 0; 599 sc->sc_work_flags = 0; 600 601 /* Disable Rx processing */ 602 bcmeth_write_4(sc, rxq->rxq_reg_rcvctl, 603 bcmeth_read_4(sc, rxq->rxq_reg_rcvctl) & ~RCVCTL_ENABLE); 604 605 /* Disable Tx processing */ 606 bcmeth_write_4(sc, txq->txq_reg_xmtctl, 607 bcmeth_read_4(sc, txq->txq_reg_xmtctl) & ~XMTCTL_ENABLE); 608 609 /* Disable all interrupts */ 610 bcmeth_write_4(sc, GMAC_INTMASK, 0); 611 612 for (;;) { 613 uint32_t tx0 = bcmeth_read_4(sc, txq->txq_reg_xmtsts0); 614 uint32_t rx0 = bcmeth_read_4(sc, rxq->rxq_reg_rcvsts0); 615 if (__SHIFTOUT(tx0, XMTSTATE) == XMTSTATE_DIS 616 && __SHIFTOUT(rx0, RCVSTATE) == RCVSTATE_DIS) 617 break; 618 delay(50); 619 } 620 /* 621 * Now reset the controller. 622 * 623 * 3. Set SW_RESET bit in UNIMAC_COMMAND_CONFIG register 624 * 4. Clear SW_RESET bit in UNIMAC_COMMAND_CONFIG register 625 */ 626 bcmeth_write_4(sc, UNIMAC_COMMAND_CONFIG, SW_RESET); 627 bcmeth_write_4(sc, GMAC_INTSTATUS, ~0); 628 sc->sc_intmask = 0; 629 ifp->if_flags &= ~IFF_RUNNING; 630 631 /* 632 * Let's consume any remaining transmitted packets. And if we are 633 * disabling the interface, purge ourselves of any untransmitted 634 * packets. But don't consume any received packets, just drop them. 635 * If we aren't disabling the interface, save the mbufs in the 636 * receive queue for reuse. 637 */ 638 bcmeth_rxq_purge(sc, &sc->sc_rxq, disable); 639 bcmeth_txq_consume(sc, &sc->sc_txq); 640 if (disable) { 641 bcmeth_txq_purge(sc, &sc->sc_txq); 642 IF_PURGE(&ifp->if_snd); 643 } 644 645 bcmeth_write_4(sc, UNIMAC_COMMAND_CONFIG, 0); 646 } 647 648 static void 649 bcmeth_ifwatchdog(struct ifnet *ifp) 650 { 651 } 652 653 static int 654 bcmeth_ifioctl(struct ifnet *ifp, u_long cmd, void *data) 655 { 656 struct bcmeth_softc *sc = ifp->if_softc; 657 struct ifreq * const ifr = data; 658 const int s = splnet(); 659 int error; 660 661 switch (cmd) { 662 case SIOCSIFMEDIA: 663 case SIOCGIFMEDIA: 664 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 665 break; 666 667 default: 668 error = ether_ioctl(ifp, cmd, data); 669 if (error != ENETRESET) 670 break; 671 672 if (cmd == SIOCADDMULTI || cmd == SIOCDELMULTI) { 673 error = 0; 674 break; 675 } 676 error = bcmeth_ifinit(ifp); 677 break; 678 } 679 680 splx(s); 681 return error; 682 } 683 684 static void 685 bcmeth_rxq_desc_presync( 686 struct bcmeth_softc *sc, 687 struct bcmeth_rxqueue *rxq, 688 struct gmac_rxdb *rxdb, 689 size_t count) 690 { 691 bus_dmamap_sync(sc->sc_dmat, rxq->rxq_descmap, 692 (rxdb - rxq->rxq_first) * sizeof(*rxdb), count * sizeof(*rxdb), 693 BUS_DMASYNC_PREWRITE); 694 } 695 696 static void 697 bcmeth_rxq_desc_postsync( 698 struct bcmeth_softc *sc, 699 struct bcmeth_rxqueue *rxq, 700 struct gmac_rxdb *rxdb, 701 size_t count) 702 { 703 bus_dmamap_sync(sc->sc_dmat, rxq->rxq_descmap, 704 (rxdb - rxq->rxq_first) * sizeof(*rxdb), count * sizeof(*rxdb), 705 BUS_DMASYNC_POSTWRITE); 706 } 707 708 static void 709 bcmeth_txq_desc_presync( 710 struct bcmeth_softc *sc, 711 struct bcmeth_txqueue *txq, 712 struct gmac_txdb *txdb, 713 size_t count) 714 { 715 bus_dmamap_sync(sc->sc_dmat, txq->txq_descmap, 716 (txdb - txq->txq_first) * sizeof(*txdb), count * sizeof(*txdb), 717 BUS_DMASYNC_PREWRITE); 718 } 719 720 static void 721 bcmeth_txq_desc_postsync( 722 struct bcmeth_softc *sc, 723 struct bcmeth_txqueue *txq, 724 struct gmac_txdb *txdb, 725 size_t count) 726 { 727 bus_dmamap_sync(sc->sc_dmat, txq->txq_descmap, 728 (txdb - txq->txq_first) * sizeof(*txdb), count * sizeof(*txdb), 729 BUS_DMASYNC_POSTWRITE); 730 } 731 732 static bus_dmamap_t 733 bcmeth_mapcache_get( 734 struct bcmeth_softc *sc, 735 struct bcmeth_mapcache *dmc) 736 { 737 KASSERT(dmc->dmc_nmaps > 0); 738 KASSERT(dmc->dmc_maps[dmc->dmc_nmaps-1] != NULL); 739 return dmc->dmc_maps[--dmc->dmc_nmaps]; 740 } 741 742 static void 743 bcmeth_mapcache_put( 744 struct bcmeth_softc *sc, 745 struct bcmeth_mapcache *dmc, 746 bus_dmamap_t map) 747 { 748 KASSERT(map != NULL); 749 KASSERT(dmc->dmc_nmaps < dmc->dmc_maxmaps); 750 dmc->dmc_maps[dmc->dmc_nmaps++] = map; 751 } 752 753 static void 754 bcmeth_mapcache_destroy( 755 struct bcmeth_softc *sc, 756 struct bcmeth_mapcache *dmc) 757 { 758 const size_t dmc_size = 759 offsetof(struct bcmeth_mapcache, dmc_maps[dmc->dmc_maxmaps]); 760 761 for (u_int i = 0; i < dmc->dmc_maxmaps; i++) { 762 bus_dmamap_destroy(sc->sc_dmat, dmc->dmc_maps[i]); 763 } 764 kmem_intr_free(dmc, dmc_size); 765 } 766 767 static int 768 bcmeth_mapcache_create( 769 struct bcmeth_softc *sc, 770 struct bcmeth_mapcache **dmc_p, 771 size_t maxmaps, 772 size_t maxmapsize, 773 size_t maxseg) 774 { 775 const size_t dmc_size = 776 offsetof(struct bcmeth_mapcache, dmc_maps[maxmaps]); 777 struct bcmeth_mapcache * const dmc = 778 kmem_intr_zalloc(dmc_size, KM_NOSLEEP); 779 780 dmc->dmc_maxmaps = maxmaps; 781 dmc->dmc_nmaps = maxmaps; 782 dmc->dmc_maxmapsize = maxmapsize; 783 dmc->dmc_maxseg = maxseg; 784 785 for (u_int i = 0; i < maxmaps; i++) { 786 int error = bus_dmamap_create(sc->sc_dmat, dmc->dmc_maxmapsize, 787 dmc->dmc_maxseg, dmc->dmc_maxmapsize, 0, 788 BUS_DMA_WAITOK|BUS_DMA_ALLOCNOW, &dmc->dmc_maps[i]); 789 if (error) { 790 aprint_error_dev(sc->sc_dev, 791 "failed to creat dma map cache " 792 "entry %u of %zu: %d\n", 793 i, maxmaps, error); 794 while (i-- > 0) { 795 bus_dmamap_destroy(sc->sc_dmat, 796 dmc->dmc_maps[i]); 797 } 798 kmem_intr_free(dmc, dmc_size); 799 return error; 800 } 801 KASSERT(dmc->dmc_maps[i] != NULL); 802 } 803 804 *dmc_p = dmc; 805 806 return 0; 807 } 808 809 #if 0 810 static void 811 bcmeth_dmamem_free( 812 bus_dma_tag_t dmat, 813 size_t map_size, 814 bus_dma_segment_t *seg, 815 bus_dmamap_t map, 816 void *kvap) 817 { 818 bus_dmamap_destroy(dmat, map); 819 bus_dmamem_unmap(dmat, kvap, map_size); 820 bus_dmamem_free(dmat, seg, 1); 821 } 822 #endif 823 824 static int 825 bcmeth_dmamem_alloc( 826 bus_dma_tag_t dmat, 827 size_t map_size, 828 bus_dma_segment_t *seg, 829 bus_dmamap_t *map, 830 void **kvap) 831 { 832 int error; 833 int nseg; 834 835 *kvap = NULL; 836 *map = NULL; 837 838 error = bus_dmamem_alloc(dmat, map_size, 2*PAGE_SIZE, 0, 839 seg, 1, &nseg, 0); 840 if (error) 841 return error; 842 843 KASSERT(nseg == 1); 844 845 error = bus_dmamem_map(dmat, seg, nseg, map_size, (void **)kvap, 0); 846 if (error == 0) { 847 error = bus_dmamap_create(dmat, map_size, 1, map_size, 0, 0, 848 map); 849 if (error == 0) { 850 error = bus_dmamap_load(dmat, *map, *kvap, map_size, 851 NULL, 0); 852 if (error == 0) 853 return 0; 854 bus_dmamap_destroy(dmat, *map); 855 *map = NULL; 856 } 857 bus_dmamem_unmap(dmat, *kvap, map_size); 858 *kvap = NULL; 859 } 860 bus_dmamem_free(dmat, seg, nseg); 861 return 0; 862 } 863 864 static struct mbuf * 865 bcmeth_rx_buf_alloc( 866 struct bcmeth_softc *sc) 867 { 868 struct mbuf *m = m_gethdr(M_DONTWAIT, MT_DATA); 869 if (m == NULL) { 870 printf("%s:%d: %s\n", __func__, __LINE__, "m_gethdr"); 871 return NULL; 872 } 873 MCLGET(m, M_DONTWAIT); 874 if ((m->m_flags & M_EXT) == 0) { 875 printf("%s:%d: %s\n", __func__, __LINE__, "MCLGET"); 876 m_freem(m); 877 return NULL; 878 } 879 m->m_len = m->m_pkthdr.len = m->m_ext.ext_size; 880 881 bus_dmamap_t map = bcmeth_mapcache_get(sc, sc->sc_rx_mapcache); 882 if (map == NULL) { 883 printf("%s:%d: %s\n", __func__, __LINE__, "map get"); 884 m_freem(m); 885 return NULL; 886 } 887 M_SETCTX(m, map); 888 m->m_len = m->m_pkthdr.len = MCLBYTES; 889 int error = bus_dmamap_load_mbuf(sc->sc_dmat, map, m, 890 BUS_DMA_READ|BUS_DMA_NOWAIT); 891 if (error) { 892 aprint_error_dev(sc->sc_dev, "fail to load rx dmamap: %d\n", 893 error); 894 M_SETCTX(m, NULL); 895 m_freem(m); 896 bcmeth_mapcache_put(sc, sc->sc_rx_mapcache, map); 897 return NULL; 898 } 899 KASSERT(map->dm_mapsize == MCLBYTES); 900 #ifdef BCMETH_RCVMAGIC 901 *mtod(m, uint32_t *) = BCMETH_RCVMAGIC; 902 bus_dmamap_sync(sc->sc_dmat, map, 0, sizeof(uint32_t), 903 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 904 bus_dmamap_sync(sc->sc_dmat, map, sizeof(uint32_t), 905 map->dm_mapsize - sizeof(uint32_t), BUS_DMASYNC_PREREAD); 906 #else 907 bus_dmamap_sync(sc->sc_dmat, map, 0, map->dm_mapsize, 908 BUS_DMASYNC_PREREAD); 909 #endif 910 911 return m; 912 } 913 914 static void 915 bcmeth_rx_map_unload( 916 struct bcmeth_softc *sc, 917 struct mbuf *m) 918 { 919 KASSERT(m); 920 for (; m != NULL; m = m->m_next) { 921 bus_dmamap_t map = M_GETCTX(m, bus_dmamap_t); 922 KASSERT(map); 923 KASSERT(map->dm_mapsize == MCLBYTES); 924 bus_dmamap_sync(sc->sc_dmat, map, 0, m->m_len, 925 BUS_DMASYNC_POSTREAD); 926 bus_dmamap_unload(sc->sc_dmat, map); 927 bcmeth_mapcache_put(sc, sc->sc_rx_mapcache, map); 928 M_SETCTX(m, NULL); 929 } 930 } 931 932 static bool 933 bcmeth_rxq_produce( 934 struct bcmeth_softc *sc, 935 struct bcmeth_rxqueue *rxq) 936 { 937 struct gmac_rxdb *producer = rxq->rxq_producer; 938 bool produced = false; 939 940 while (rxq->rxq_inuse < rxq->rxq_threshold) { 941 struct mbuf *m; 942 IF_DEQUEUE(&sc->sc_rx_bufcache, m); 943 if (m == NULL) { 944 m = bcmeth_rx_buf_alloc(sc); 945 if (m == NULL) { 946 printf("%s: bcmeth_rx_buf_alloc failed\n", __func__); 947 break; 948 } 949 } 950 bus_dmamap_t map = M_GETCTX(m, bus_dmamap_t); 951 KASSERT(map); 952 953 producer->rxdb_buflen = MCLBYTES; 954 producer->rxdb_addrlo = map->dm_segs[0].ds_addr; 955 producer->rxdb_flags &= RXDB_FLAG_ET; 956 *rxq->rxq_mtail = m; 957 rxq->rxq_mtail = &m->m_next; 958 m->m_len = MCLBYTES; 959 m->m_next = NULL; 960 rxq->rxq_inuse++; 961 if (++producer == rxq->rxq_last) { 962 membar_producer(); 963 bcmeth_rxq_desc_presync(sc, rxq, rxq->rxq_producer, 964 rxq->rxq_last - rxq->rxq_producer); 965 producer = rxq->rxq_producer = rxq->rxq_first; 966 } 967 produced = true; 968 } 969 if (produced) { 970 membar_producer(); 971 if (producer != rxq->rxq_producer) { 972 bcmeth_rxq_desc_presync(sc, rxq, rxq->rxq_producer, 973 producer - rxq->rxq_producer); 974 rxq->rxq_producer = producer; 975 } 976 bcmeth_write_4(sc, rxq->rxq_reg_rcvptr, 977 rxq->rxq_descmap->dm_segs[0].ds_addr 978 + ((uintptr_t)producer & RCVPTR)); 979 } 980 return true; 981 } 982 983 static void 984 bcmeth_rx_input( 985 struct bcmeth_softc *sc, 986 struct mbuf *m, 987 uint32_t rxdb_flags) 988 { 989 struct ifnet * const ifp = &sc->sc_if; 990 991 bcmeth_rx_map_unload(sc, m); 992 993 m_adj(m, sc->sc_rcvoffset); 994 995 /* 996 * If we are in promiscuous mode and this isn't a multicast, check the 997 * destination address to make sure it matches our own. If it doesn't, 998 * mark the packet as being received promiscuously. 999 */ 1000 if ((sc->sc_cmdcfg & PROMISC_EN) 1001 && (m->m_data[0] & 1) == 0 1002 && (*(uint16_t *)&m->m_data[0] != sc->sc_macaddr[0] 1003 || *(uint32_t *)&m->m_data[2] != sc->sc_macaddr[1])) { 1004 m->m_flags |= M_PROMISC; 1005 } 1006 m->m_pkthdr.rcvif = ifp; 1007 1008 ifp->if_ipackets++; 1009 ifp->if_ibytes += m->m_pkthdr.len; 1010 1011 /* 1012 * Let's give it to the network subsystm to deal with. 1013 */ 1014 #ifdef BCMETH_MPSAFE 1015 mutex_exit(sc->sc_lock); 1016 (*ifp->if_input)(ifp, m); 1017 mutex_enter(sc->sc_lock); 1018 #else 1019 int s = splnet(); 1020 bpf_mtap(ifp, m); 1021 (*ifp->if_input)(ifp, m); 1022 splx(s); 1023 #endif 1024 } 1025 1026 static bool 1027 bcmeth_rxq_consume( 1028 struct bcmeth_softc *sc, 1029 struct bcmeth_rxqueue *rxq, 1030 size_t atmost) 1031 { 1032 struct ifnet * const ifp = &sc->sc_if; 1033 struct gmac_rxdb *consumer = rxq->rxq_consumer; 1034 size_t rxconsumed = 0; 1035 bool didconsume = false; 1036 1037 while (atmost-- > 0) { 1038 if (consumer == rxq->rxq_producer) { 1039 KASSERT(rxq->rxq_inuse == 0); 1040 break; 1041 } 1042 1043 uint32_t rcvsts0 = bcmeth_read_4(sc, rxq->rxq_reg_rcvsts0); 1044 uint32_t currdscr = __SHIFTOUT(rcvsts0, RCV_CURRDSCR); 1045 if (consumer == rxq->rxq_first + currdscr) { 1046 break; 1047 } 1048 bcmeth_rxq_desc_postsync(sc, rxq, consumer, 1); 1049 1050 /* 1051 * We own this packet again. Copy the rxsts word from it. 1052 */ 1053 rxconsumed++; 1054 didconsume = true; 1055 uint32_t rxsts; 1056 KASSERT(rxq->rxq_mhead != NULL); 1057 bus_dmamap_t map = M_GETCTX(rxq->rxq_mhead, bus_dmamap_t); 1058 bus_dmamap_sync(sc->sc_dmat, map, 0, arm_dcache_align, 1059 BUS_DMASYNC_POSTREAD); 1060 memcpy(&rxsts, rxq->rxq_mhead->m_data, 4); 1061 #if 0 1062 KASSERTMSG(rxsts != BCMETH_RCVMAGIC, "currdscr=%u consumer=%zd", 1063 currdscr, consumer - rxq->rxq_first); 1064 #endif 1065 1066 /* 1067 * Get the count of descriptors. Fetch the correct number 1068 * of mbufs. 1069 */ 1070 #ifdef BCMETH_RCVMAGIC 1071 size_t desc_count = rxsts != BCMETH_RCVMAGIC ? __SHIFTOUT(rxsts, RXSTS_DESC_COUNT) + 1 : 1; 1072 #else 1073 size_t desc_count = __SHIFTOUT(rxsts, RXSTS_DESC_COUNT) + 1; 1074 #endif 1075 struct mbuf *m = rxq->rxq_mhead; 1076 struct mbuf *m_last = m; 1077 for (size_t i = 1; i < desc_count; i++) { 1078 if (++consumer == rxq->rxq_last) { 1079 consumer = rxq->rxq_first; 1080 } 1081 KASSERTMSG(consumer != rxq->rxq_first + currdscr, 1082 "i=%zu rxsts=%#x desc_count=%zu currdscr=%u consumer=%zd", 1083 i, rxsts, desc_count, currdscr, 1084 consumer - rxq->rxq_first); 1085 m_last = m_last->m_next; 1086 } 1087 1088 /* 1089 * Now remove it/them from the list of enqueued mbufs. 1090 */ 1091 if ((rxq->rxq_mhead = m_last->m_next) == NULL) 1092 rxq->rxq_mtail = &rxq->rxq_mhead; 1093 m_last->m_next = NULL; 1094 1095 #ifdef BCMETH_RCVMAGIC 1096 if (rxsts == BCMETH_RCVMAGIC) { 1097 ifp->if_ierrors++; 1098 if ((m->m_ext.ext_paddr >> 28) == 8) { 1099 BCMETH_EVCNT_INCR(sc->sc_ev_rx_badmagic_lo); 1100 } else { 1101 BCMETH_EVCNT_INCR( sc->sc_ev_rx_badmagic_hi); 1102 } 1103 IF_ENQUEUE(&sc->sc_rx_bufcache, m); 1104 } else 1105 #endif /* BCMETH_RCVMAGIC */ 1106 if (rxsts & (RXSTS_CRC_ERROR|RXSTS_OVERSIZED|RXSTS_PKT_OVERFLOW)) { 1107 aprint_error_dev(sc->sc_dev, "[%zu]: count=%zu rxsts=%#x\n", 1108 consumer - rxq->rxq_first, desc_count, rxsts); 1109 /* 1110 * We encountered an error, take the mbufs and add them 1111 * to the rx bufcache so we can quickly reuse them. 1112 */ 1113 ifp->if_ierrors++; 1114 do { 1115 struct mbuf *m0 = m->m_next; 1116 m->m_next = NULL; 1117 IF_ENQUEUE(&sc->sc_rx_bufcache, m); 1118 m = m0; 1119 } while (m); 1120 } else { 1121 uint32_t framelen = __SHIFTOUT(rxsts, RXSTS_FRAMELEN); 1122 framelen += sc->sc_rcvoffset; 1123 m->m_pkthdr.len = framelen; 1124 if (desc_count == 1) { 1125 KASSERT(framelen <= MCLBYTES); 1126 m->m_len = framelen; 1127 } else { 1128 m_last->m_len = framelen & (MCLBYTES - 1); 1129 } 1130 1131 #ifdef BCMETH_MPSAFE 1132 /* 1133 * Wrap at the last entry! 1134 */ 1135 if (++consumer == rxq->rxq_last) { 1136 KASSERT(consumer[-1].rxdb_flags & RXDB_FLAG_ET); 1137 rxq->rxq_consumer = rxq->rxq_first; 1138 } else { 1139 rxq->rxq_consumer = consumer; 1140 } 1141 rxq->rxq_inuse -= rxconsumed; 1142 #endif /* BCMETH_MPSAFE */ 1143 1144 /* 1145 * Receive the packet (which releases our lock) 1146 */ 1147 bcmeth_rx_input(sc, m, rxsts); 1148 1149 #ifdef BCMETH_MPSAFE 1150 /* 1151 * Since we had to give up our lock, we need to 1152 * refresh these. 1153 */ 1154 consumer = rxq->rxq_consumer; 1155 rxconsumed = 0; 1156 continue; 1157 #endif /* BCMETH_MPSAFE */ 1158 } 1159 1160 /* 1161 * Wrap at the last entry! 1162 */ 1163 if (++consumer == rxq->rxq_last) { 1164 KASSERT(consumer[-1].rxdb_flags & RXDB_FLAG_ET); 1165 consumer = rxq->rxq_first; 1166 } 1167 } 1168 1169 /* 1170 * Update queue info. 1171 */ 1172 rxq->rxq_consumer = consumer; 1173 rxq->rxq_inuse -= rxconsumed; 1174 1175 /* 1176 * Did we consume anything? 1177 */ 1178 return didconsume; 1179 } 1180 1181 static void 1182 bcmeth_rxq_purge( 1183 struct bcmeth_softc *sc, 1184 struct bcmeth_rxqueue *rxq, 1185 bool discard) 1186 { 1187 struct mbuf *m; 1188 1189 if ((m = rxq->rxq_mhead) != NULL) { 1190 if (discard) { 1191 bcmeth_rx_map_unload(sc, m); 1192 m_freem(m); 1193 } else { 1194 while (m != NULL) { 1195 struct mbuf *m0 = m->m_next; 1196 m->m_next = NULL; 1197 IF_ENQUEUE(&sc->sc_rx_bufcache, m); 1198 m = m0; 1199 } 1200 } 1201 1202 } 1203 1204 rxq->rxq_mhead = NULL; 1205 rxq->rxq_mtail = &rxq->rxq_mhead; 1206 rxq->rxq_inuse = 0; 1207 } 1208 1209 static void 1210 bcmeth_rxq_reset( 1211 struct bcmeth_softc *sc, 1212 struct bcmeth_rxqueue *rxq) 1213 { 1214 /* 1215 * sync all the descriptors 1216 */ 1217 bcmeth_rxq_desc_postsync(sc, rxq, rxq->rxq_first, 1218 rxq->rxq_last - rxq->rxq_first); 1219 1220 /* 1221 * Make sure we own all descriptors in the ring. 1222 */ 1223 struct gmac_rxdb *rxdb; 1224 for (rxdb = rxq->rxq_first; rxdb < rxq->rxq_last - 1; rxdb++) { 1225 rxdb->rxdb_flags = RXDB_FLAG_IC; 1226 } 1227 1228 /* 1229 * Last descriptor has the wrap flag. 1230 */ 1231 rxdb->rxdb_flags = RXDB_FLAG_ET|RXDB_FLAG_IC; 1232 1233 /* 1234 * Reset the producer consumer indexes. 1235 */ 1236 rxq->rxq_consumer = rxq->rxq_first; 1237 rxq->rxq_producer = rxq->rxq_first; 1238 rxq->rxq_inuse = 0; 1239 if (rxq->rxq_threshold < BCMETH_MINRXMBUFS) 1240 rxq->rxq_threshold = BCMETH_MINRXMBUFS; 1241 1242 sc->sc_intmask |= RCVINT|RCVFIFOOF|RCVDESCUF; 1243 1244 /* 1245 * Restart the receiver at the first descriptor 1246 */ 1247 bcmeth_write_4(sc, rxq->rxq_reg_rcvaddrlo, 1248 rxq->rxq_descmap->dm_segs[0].ds_addr); 1249 } 1250 1251 static int 1252 bcmeth_rxq_attach( 1253 struct bcmeth_softc *sc, 1254 struct bcmeth_rxqueue *rxq, 1255 u_int qno) 1256 { 1257 size_t desc_count = BCMETH_RINGSIZE / sizeof(rxq->rxq_first[0]); 1258 int error; 1259 void *descs; 1260 1261 KASSERT(desc_count == 256 || desc_count == 512); 1262 1263 error = bcmeth_dmamem_alloc(sc->sc_dmat, BCMETH_RINGSIZE, 1264 &rxq->rxq_descmap_seg, &rxq->rxq_descmap, &descs); 1265 if (error) 1266 return error; 1267 1268 memset(descs, 0, BCMETH_RINGSIZE); 1269 rxq->rxq_first = descs; 1270 rxq->rxq_last = rxq->rxq_first + desc_count; 1271 rxq->rxq_consumer = descs; 1272 rxq->rxq_producer = descs; 1273 1274 bcmeth_rxq_purge(sc, rxq, true); 1275 bcmeth_rxq_reset(sc, rxq); 1276 1277 rxq->rxq_reg_rcvaddrlo = GMAC_RCVADDR_LOW; 1278 rxq->rxq_reg_rcvctl = GMAC_RCVCONTROL; 1279 rxq->rxq_reg_rcvptr = GMAC_RCVPTR; 1280 rxq->rxq_reg_rcvsts0 = GMAC_RCVSTATUS0; 1281 rxq->rxq_reg_rcvsts1 = GMAC_RCVSTATUS1; 1282 1283 return 0; 1284 } 1285 1286 static bool 1287 bcmeth_txq_active_p( 1288 struct bcmeth_softc * const sc, 1289 struct bcmeth_txqueue *txq) 1290 { 1291 return !IF_IS_EMPTY(&txq->txq_mbufs); 1292 } 1293 1294 static bool 1295 bcmeth_txq_fillable_p( 1296 struct bcmeth_softc * const sc, 1297 struct bcmeth_txqueue *txq) 1298 { 1299 return txq->txq_free >= txq->txq_threshold; 1300 } 1301 1302 static int 1303 bcmeth_txq_attach( 1304 struct bcmeth_softc *sc, 1305 struct bcmeth_txqueue *txq, 1306 u_int qno) 1307 { 1308 size_t desc_count = BCMETH_RINGSIZE / sizeof(txq->txq_first[0]); 1309 int error; 1310 void *descs; 1311 1312 KASSERT(desc_count == 256 || desc_count == 512); 1313 1314 error = bcmeth_dmamem_alloc(sc->sc_dmat, BCMETH_RINGSIZE, 1315 &txq->txq_descmap_seg, &txq->txq_descmap, &descs); 1316 if (error) 1317 return error; 1318 1319 memset(descs, 0, BCMETH_RINGSIZE); 1320 txq->txq_first = descs; 1321 txq->txq_last = txq->txq_first + desc_count; 1322 txq->txq_consumer = descs; 1323 txq->txq_producer = descs; 1324 1325 IFQ_SET_MAXLEN(&txq->txq_mbufs, BCMETH_MAXTXMBUFS); 1326 1327 txq->txq_reg_xmtaddrlo = GMAC_XMTADDR_LOW; 1328 txq->txq_reg_xmtctl = GMAC_XMTCONTROL; 1329 txq->txq_reg_xmtptr = GMAC_XMTPTR; 1330 txq->txq_reg_xmtsts0 = GMAC_XMTSTATUS0; 1331 txq->txq_reg_xmtsts1 = GMAC_XMTSTATUS1; 1332 1333 bcmeth_txq_reset(sc, txq); 1334 1335 return 0; 1336 } 1337 1338 static int 1339 bcmeth_txq_map_load( 1340 struct bcmeth_softc *sc, 1341 struct bcmeth_txqueue *txq, 1342 struct mbuf *m) 1343 { 1344 bus_dmamap_t map; 1345 int error; 1346 1347 map = M_GETCTX(m, bus_dmamap_t); 1348 if (map != NULL) 1349 return 0; 1350 1351 map = bcmeth_mapcache_get(sc, sc->sc_tx_mapcache); 1352 if (map == NULL) 1353 return ENOMEM; 1354 1355 error = bus_dmamap_load_mbuf(sc->sc_dmat, map, m, 1356 BUS_DMA_WRITE | BUS_DMA_NOWAIT); 1357 if (error) 1358 return error; 1359 1360 bus_dmamap_sync(sc->sc_dmat, map, 0, m->m_pkthdr.len, 1361 BUS_DMASYNC_PREWRITE); 1362 M_SETCTX(m, map); 1363 return 0; 1364 } 1365 1366 static void 1367 bcmeth_txq_map_unload( 1368 struct bcmeth_softc *sc, 1369 struct bcmeth_txqueue *txq, 1370 struct mbuf *m) 1371 { 1372 KASSERT(m); 1373 bus_dmamap_t map = M_GETCTX(m, bus_dmamap_t); 1374 bus_dmamap_sync(sc->sc_dmat, map, 0, map->dm_mapsize, 1375 BUS_DMASYNC_POSTWRITE); 1376 bus_dmamap_unload(sc->sc_dmat, map); 1377 bcmeth_mapcache_put(sc, sc->sc_tx_mapcache, map); 1378 } 1379 1380 static bool 1381 bcmeth_txq_produce( 1382 struct bcmeth_softc *sc, 1383 struct bcmeth_txqueue *txq, 1384 struct mbuf *m) 1385 { 1386 bus_dmamap_t map = M_GETCTX(m, bus_dmamap_t); 1387 1388 if (map->dm_nsegs > txq->txq_free) 1389 return false; 1390 1391 /* 1392 * TCP Offload flag must be set in the first descriptor. 1393 */ 1394 struct gmac_txdb *producer = txq->txq_producer; 1395 uint32_t first_flags = TXDB_FLAG_SF; 1396 uint32_t last_flags = TXDB_FLAG_EF; 1397 1398 /* 1399 * If we've produced enough descriptors without consuming any 1400 * we need to ask for an interrupt to reclaim some. 1401 */ 1402 txq->txq_lastintr += map->dm_nsegs; 1403 if (txq->txq_lastintr >= txq->txq_threshold 1404 || txq->txq_mbufs.ifq_len + 1 == txq->txq_mbufs.ifq_maxlen) { 1405 txq->txq_lastintr = 0; 1406 last_flags |= TXDB_FLAG_IC; 1407 } 1408 1409 KASSERT(producer != txq->txq_last); 1410 1411 struct gmac_txdb *start = producer; 1412 size_t count = map->dm_nsegs; 1413 producer->txdb_flags |= first_flags; 1414 producer->txdb_addrlo = map->dm_segs[0].ds_addr; 1415 producer->txdb_buflen = map->dm_segs[0].ds_len; 1416 for (u_int i = 1; i < map->dm_nsegs; i++) { 1417 #if 0 1418 printf("[%zu]: %#x/%#x/%#x/%#x\n", producer - txq->txq_first, 1419 producer->txdb_flags, producer->txdb_buflen, 1420 producer->txdb_addrlo, producer->txdb_addrhi); 1421 #endif 1422 if (__predict_false(++producer == txq->txq_last)) { 1423 bcmeth_txq_desc_presync(sc, txq, start, 1424 txq->txq_last - start); 1425 count -= txq->txq_last - start; 1426 producer = txq->txq_first; 1427 start = txq->txq_first; 1428 } 1429 producer->txdb_addrlo = map->dm_segs[i].ds_addr; 1430 producer->txdb_buflen = map->dm_segs[i].ds_len; 1431 } 1432 producer->txdb_flags |= last_flags; 1433 #if 0 1434 printf("[%zu]: %#x/%#x/%#x/%#x\n", producer - txq->txq_first, 1435 producer->txdb_flags, producer->txdb_buflen, 1436 producer->txdb_addrlo, producer->txdb_addrhi); 1437 #endif 1438 if (count) 1439 bcmeth_txq_desc_presync(sc, txq, start, count); 1440 1441 /* 1442 * Reduce free count by the number of segments we consumed. 1443 */ 1444 txq->txq_free -= map->dm_nsegs; 1445 KASSERT(map->dm_nsegs == 1 || txq->txq_producer != producer); 1446 KASSERT(map->dm_nsegs == 1 || (txq->txq_producer->txdb_flags & TXDB_FLAG_EF) == 0); 1447 KASSERT(producer->txdb_flags & TXDB_FLAG_EF); 1448 1449 #if 0 1450 printf("%s: mbuf %p: produced a %u byte packet in %u segments (%zd..%zd)\n", 1451 __func__, m, m->m_pkthdr.len, map->dm_nsegs, 1452 txq->txq_producer - txq->txq_first, producer - txq->txq_first); 1453 #endif 1454 1455 if (producer + 1 == txq->txq_last) 1456 txq->txq_producer = txq->txq_first; 1457 else 1458 txq->txq_producer = producer + 1; 1459 IF_ENQUEUE(&txq->txq_mbufs, m); 1460 1461 /* 1462 * Let the transmitter know there's more to do 1463 */ 1464 bcmeth_write_4(sc, txq->txq_reg_xmtptr, 1465 txq->txq_descmap->dm_segs[0].ds_addr 1466 + ((uintptr_t)txq->txq_producer & XMT_LASTDSCR)); 1467 1468 return true; 1469 } 1470 1471 static struct mbuf * 1472 bcmeth_copy_packet(struct mbuf *m) 1473 { 1474 struct mbuf *mext = NULL; 1475 size_t misalignment = 0; 1476 size_t hlen = 0; 1477 1478 for (mext = m; mext != NULL; mext = mext->m_next) { 1479 if (mext->m_flags & M_EXT) { 1480 misalignment = mtod(mext, vaddr_t) & arm_dcache_align; 1481 break; 1482 } 1483 hlen += m->m_len; 1484 } 1485 1486 struct mbuf *n = m->m_next; 1487 if (m != mext && hlen + misalignment <= MHLEN && false) { 1488 KASSERT(m->m_pktdat <= m->m_data && m->m_data <= &m->m_pktdat[MHLEN - m->m_len]); 1489 size_t oldoff = m->m_data - m->m_pktdat; 1490 size_t off; 1491 if (mext == NULL) { 1492 off = (oldoff + hlen > MHLEN) ? 0 : oldoff; 1493 } else { 1494 off = MHLEN - (hlen + misalignment); 1495 } 1496 KASSERT(off + hlen + misalignment <= MHLEN); 1497 if (((oldoff ^ off) & arm_dcache_align) != 0 || off < oldoff) { 1498 memmove(&m->m_pktdat[off], m->m_data, m->m_len); 1499 m->m_data = &m->m_pktdat[off]; 1500 } 1501 m_copydata(n, 0, hlen - m->m_len, &m->m_data[m->m_len]); 1502 m->m_len = hlen; 1503 m->m_next = mext; 1504 while (n != mext) { 1505 n = m_free(n); 1506 } 1507 return m; 1508 } 1509 1510 struct mbuf *m0 = m_gethdr(M_DONTWAIT, m->m_type); 1511 if (m0 == NULL) { 1512 return NULL; 1513 } 1514 M_COPY_PKTHDR(m0, m); 1515 MCLAIM(m0, m->m_owner); 1516 if (m0->m_pkthdr.len > MHLEN) { 1517 MCLGET(m0, M_DONTWAIT); 1518 if ((m0->m_flags & M_EXT) == 0) { 1519 m_freem(m0); 1520 return NULL; 1521 } 1522 } 1523 m0->m_len = m->m_pkthdr.len; 1524 m_copydata(m, 0, m0->m_len, mtod(m0, void *)); 1525 m_freem(m); 1526 return m0; 1527 } 1528 1529 static bool 1530 bcmeth_txq_enqueue( 1531 struct bcmeth_softc *sc, 1532 struct bcmeth_txqueue *txq) 1533 { 1534 for (;;) { 1535 if (IF_QFULL(&txq->txq_mbufs)) 1536 return false; 1537 struct mbuf *m = txq->txq_next; 1538 if (m == NULL) { 1539 int s = splnet(); 1540 IF_DEQUEUE(&sc->sc_if.if_snd, m); 1541 splx(s); 1542 if (m == NULL) 1543 return true; 1544 M_SETCTX(m, NULL); 1545 } else { 1546 txq->txq_next = NULL; 1547 } 1548 /* 1549 * If LINK2 is set and this packet uses multiple mbufs, 1550 * consolidate it into a single mbuf. 1551 */ 1552 if (m->m_next != NULL && (sc->sc_if.if_flags & IFF_LINK2)) { 1553 struct mbuf *m0 = bcmeth_copy_packet(m); 1554 if (m0 == NULL) { 1555 txq->txq_next = m; 1556 return true; 1557 } 1558 m = m0; 1559 } 1560 int error = bcmeth_txq_map_load(sc, txq, m); 1561 if (error) { 1562 aprint_error_dev(sc->sc_dev, 1563 "discarded packet due to " 1564 "dmamap load failure: %d\n", error); 1565 m_freem(m); 1566 continue; 1567 } 1568 KASSERT(txq->txq_next == NULL); 1569 if (!bcmeth_txq_produce(sc, txq, m)) { 1570 txq->txq_next = m; 1571 return false; 1572 } 1573 KASSERT(txq->txq_next == NULL); 1574 } 1575 } 1576 1577 static bool 1578 bcmeth_txq_consume( 1579 struct bcmeth_softc *sc, 1580 struct bcmeth_txqueue *txq) 1581 { 1582 struct ifnet * const ifp = &sc->sc_if; 1583 struct gmac_txdb *consumer = txq->txq_consumer; 1584 size_t txfree = 0; 1585 1586 #if 0 1587 printf("%s: entry: free=%zu\n", __func__, txq->txq_free); 1588 #endif 1589 1590 for (;;) { 1591 if (consumer == txq->txq_producer) { 1592 txq->txq_consumer = consumer; 1593 txq->txq_free += txfree; 1594 txq->txq_lastintr -= min(txq->txq_lastintr, txfree); 1595 #if 0 1596 printf("%s: empty: freed %zu descriptors going from %zu to %zu\n", 1597 __func__, txfree, txq->txq_free - txfree, txq->txq_free); 1598 #endif 1599 KASSERT(txq->txq_lastintr == 0); 1600 KASSERT(txq->txq_free == txq->txq_last - txq->txq_first - 1); 1601 return true; 1602 } 1603 bcmeth_txq_desc_postsync(sc, txq, consumer, 1); 1604 uint32_t s0 = bcmeth_read_4(sc, txq->txq_reg_xmtsts0); 1605 if (consumer == txq->txq_first + __SHIFTOUT(s0, XMT_CURRDSCR)) { 1606 txq->txq_consumer = consumer; 1607 txq->txq_free += txfree; 1608 txq->txq_lastintr -= min(txq->txq_lastintr, txfree); 1609 #if 0 1610 printf("%s: freed %zu descriptors\n", 1611 __func__, txfree); 1612 #endif 1613 return bcmeth_txq_fillable_p(sc, txq); 1614 } 1615 1616 /* 1617 * If this is the last descriptor in the chain, get the 1618 * mbuf, free its dmamap, and free the mbuf chain itself. 1619 */ 1620 const uint32_t txdb_flags = consumer->txdb_flags; 1621 if (txdb_flags & TXDB_FLAG_EF) { 1622 struct mbuf *m; 1623 1624 IF_DEQUEUE(&txq->txq_mbufs, m); 1625 KASSERT(m); 1626 bcmeth_txq_map_unload(sc, txq, m); 1627 #if 0 1628 printf("%s: mbuf %p: consumed a %u byte packet\n", 1629 __func__, m, m->m_pkthdr.len); 1630 #endif 1631 bpf_mtap(ifp, m); 1632 ifp->if_opackets++; 1633 ifp->if_obytes += m->m_pkthdr.len; 1634 if (m->m_flags & M_MCAST) 1635 ifp->if_omcasts++; 1636 m_freem(m); 1637 } 1638 1639 /* 1640 * We own this packet again. Clear all flags except wrap. 1641 */ 1642 txfree++; 1643 1644 /* 1645 * Wrap at the last entry! 1646 */ 1647 if (txdb_flags & TXDB_FLAG_ET) { 1648 consumer->txdb_flags = TXDB_FLAG_ET; 1649 KASSERT(consumer + 1 == txq->txq_last); 1650 consumer = txq->txq_first; 1651 } else { 1652 consumer->txdb_flags = 0; 1653 consumer++; 1654 KASSERT(consumer < txq->txq_last); 1655 } 1656 } 1657 } 1658 1659 static void 1660 bcmeth_txq_purge( 1661 struct bcmeth_softc *sc, 1662 struct bcmeth_txqueue *txq) 1663 { 1664 struct mbuf *m; 1665 KASSERT((bcmeth_read_4(sc, UNIMAC_COMMAND_CONFIG) & TX_ENA) == 0); 1666 1667 for (;;) { 1668 IF_DEQUEUE(&txq->txq_mbufs, m); 1669 if (m == NULL) 1670 break; 1671 bcmeth_txq_map_unload(sc, txq, m); 1672 m_freem(m); 1673 } 1674 if ((m = txq->txq_next) != NULL) { 1675 txq->txq_next = NULL; 1676 bcmeth_txq_map_unload(sc, txq, m); 1677 m_freem(m); 1678 } 1679 } 1680 1681 static void 1682 bcmeth_txq_reset( 1683 struct bcmeth_softc *sc, 1684 struct bcmeth_txqueue *txq) 1685 { 1686 /* 1687 * sync all the descriptors 1688 */ 1689 bcmeth_txq_desc_postsync(sc, txq, txq->txq_first, 1690 txq->txq_last - txq->txq_first); 1691 1692 /* 1693 * Make sure we own all descriptors in the ring. 1694 */ 1695 struct gmac_txdb *txdb; 1696 for (txdb = txq->txq_first; txdb < txq->txq_last - 1; txdb++) { 1697 txdb->txdb_flags = 0; 1698 } 1699 1700 /* 1701 * Last descriptor has the wrap flag. 1702 */ 1703 txdb->txdb_flags = TXDB_FLAG_ET; 1704 1705 /* 1706 * Reset the producer consumer indexes. 1707 */ 1708 txq->txq_consumer = txq->txq_first; 1709 txq->txq_producer = txq->txq_first; 1710 txq->txq_free = txq->txq_last - txq->txq_first - 1; 1711 txq->txq_threshold = txq->txq_free / 2; 1712 txq->txq_lastintr = 0; 1713 1714 /* 1715 * What do we want to get interrupted on? 1716 */ 1717 sc->sc_intmask |= XMTINT_0 | XMTUF; 1718 1719 /* 1720 * Restart the transmiter at the first descriptor 1721 */ 1722 bcmeth_write_4(sc, txq->txq_reg_xmtaddrlo, 1723 txq->txq_descmap->dm_segs->ds_addr); 1724 } 1725 1726 static void 1727 bcmeth_ifstart(struct ifnet *ifp) 1728 { 1729 struct bcmeth_softc * const sc = ifp->if_softc; 1730 1731 if (__predict_false((ifp->if_flags & IFF_RUNNING) == 0)) { 1732 return; 1733 } 1734 1735 #ifdef BCMETH_MPSAFETX 1736 if (cpu_intr_p()) { 1737 #endif 1738 atomic_or_uint(&sc->sc_soft_flags, SOFT_TXINTR); 1739 softint_schedule(sc->sc_soft_ih); 1740 #ifdef BCMETH_MPSAFETX 1741 } else { 1742 /* 1743 * Either we are in a softintr thread already or some other 1744 * thread so just borrow it to do the send and save ourselves 1745 * the overhead of a fast soft int. 1746 */ 1747 bcmeth_soft_txintr(sc); 1748 } 1749 #endif 1750 } 1751 1752 int 1753 bcmeth_intr(void *arg) 1754 { 1755 struct bcmeth_softc * const sc = arg; 1756 uint32_t soft_flags = 0; 1757 uint32_t work_flags = 0; 1758 int rv = 0; 1759 1760 mutex_enter(sc->sc_hwlock); 1761 1762 uint32_t intmask = sc->sc_intmask; 1763 BCMETH_EVCNT_INCR(sc->sc_ev_intr); 1764 1765 for (;;) { 1766 uint32_t intstatus = bcmeth_read_4(sc, GMAC_INTSTATUS); 1767 intstatus &= intmask; 1768 bcmeth_write_4(sc, GMAC_INTSTATUS, intstatus); /* write 1 to clear */ 1769 if (intstatus == 0) { 1770 break; 1771 } 1772 #if 0 1773 aprint_normal_dev(sc->sc_dev, "%s: intstatus=%#x intmask=%#x\n", 1774 __func__, intstatus, bcmeth_read_4(sc, GMAC_INTMASK)); 1775 #endif 1776 if (intstatus & RCVINT) { 1777 struct bcmeth_rxqueue * const rxq = &sc->sc_rxq; 1778 intmask &= ~RCVINT; 1779 1780 uint32_t rcvsts0 = bcmeth_read_4(sc, rxq->rxq_reg_rcvsts0); 1781 uint32_t descs = __SHIFTOUT(rcvsts0, RCV_CURRDSCR); 1782 if (descs < rxq->rxq_consumer - rxq->rxq_first) { 1783 /* 1784 * We wrapped at the end so count how far 1785 * we are from the end. 1786 */ 1787 descs += rxq->rxq_last - rxq->rxq_consumer; 1788 } else { 1789 descs -= rxq->rxq_consumer - rxq->rxq_first; 1790 } 1791 /* 1792 * If we "timedout" we can't be hogging so use 1793 * softints. If we exceeded then we might hogging 1794 * so let the workqueue deal with them. 1795 */ 1796 const uint32_t framecount = __SHIFTOUT(sc->sc_rcvlazy, INTRCVLAZY_FRAMECOUNT); 1797 if (descs < framecount 1798 || (curcpu()->ci_curlwp->l_flag & LW_IDLE)) { 1799 soft_flags |= SOFT_RXINTR; 1800 } else { 1801 work_flags |= WORK_RXINTR; 1802 } 1803 } 1804 1805 if (intstatus & XMTINT_0) { 1806 intmask &= ~XMTINT_0; 1807 soft_flags |= SOFT_TXINTR; 1808 } 1809 1810 if (intstatus & RCVDESCUF) { 1811 intmask &= ~RCVDESCUF; 1812 work_flags |= WORK_RXUNDERFLOW; 1813 } 1814 1815 intstatus &= intmask; 1816 if (intstatus) { 1817 aprint_error_dev(sc->sc_dev, 1818 "intr: intstatus=%#x\n", intstatus); 1819 aprint_error_dev(sc->sc_dev, 1820 "rcvbase=%p/%#lx rcvptr=%#x rcvsts=%#x/%#x\n", 1821 sc->sc_rxq.rxq_first, 1822 sc->sc_rxq.rxq_descmap->dm_segs[0].ds_addr, 1823 bcmeth_read_4(sc, sc->sc_rxq.rxq_reg_rcvptr), 1824 bcmeth_read_4(sc, sc->sc_rxq.rxq_reg_rcvsts0), 1825 bcmeth_read_4(sc, sc->sc_rxq.rxq_reg_rcvsts1)); 1826 aprint_error_dev(sc->sc_dev, 1827 "xmtbase=%p/%#lx xmtptr=%#x xmtsts=%#x/%#x\n", 1828 sc->sc_txq.txq_first, 1829 sc->sc_txq.txq_descmap->dm_segs[0].ds_addr, 1830 bcmeth_read_4(sc, sc->sc_txq.txq_reg_xmtptr), 1831 bcmeth_read_4(sc, sc->sc_txq.txq_reg_xmtsts0), 1832 bcmeth_read_4(sc, sc->sc_txq.txq_reg_xmtsts1)); 1833 intmask &= ~intstatus; 1834 work_flags |= WORK_REINIT; 1835 break; 1836 } 1837 } 1838 1839 if (intmask != sc->sc_intmask) { 1840 bcmeth_write_4(sc, GMAC_INTMASK, sc->sc_intmask); 1841 } 1842 1843 if (work_flags) { 1844 if (sc->sc_work_flags == 0) { 1845 workqueue_enqueue(sc->sc_workq, &sc->sc_work, NULL); 1846 } 1847 atomic_or_32(&sc->sc_work_flags, work_flags); 1848 rv = 1; 1849 } 1850 1851 if (soft_flags) { 1852 if (sc->sc_soft_flags == 0) { 1853 softint_schedule(sc->sc_soft_ih); 1854 } 1855 atomic_or_32(&sc->sc_soft_flags, soft_flags); 1856 rv = 1; 1857 } 1858 1859 mutex_exit(sc->sc_hwlock); 1860 1861 return rv; 1862 } 1863 1864 #ifdef BCMETH_MPSAFETX 1865 void 1866 bcmeth_soft_txintr(struct bcmeth_softc *sc) 1867 { 1868 mutex_enter(sc->sc_lock); 1869 /* 1870 * Let's do what we came here for. Consume transmitted 1871 * packets off the the transmit ring. 1872 */ 1873 if (!bcmeth_txq_consume(sc, &sc->sc_txq) 1874 || !bcmeth_txq_enqueue(sc, &sc->sc_txq)) { 1875 BCMETH_EVCNT_INCR(sc->sc_ev_tx_stall); 1876 sc->sc_if.if_flags |= IFF_OACTIVE; 1877 } else { 1878 sc->sc_if.if_flags &= ~IFF_OACTIVE; 1879 } 1880 if (sc->sc_if.if_flags & IFF_RUNNING) { 1881 mutex_spin_enter(sc->sc_hwlock); 1882 sc->sc_intmask |= XMTINT_0; 1883 bcmeth_write_4(sc, GMAC_INTMASK, sc->sc_intmask); 1884 mutex_spin_exit(sc->sc_hwlock); 1885 } 1886 mutex_exit(sc->sc_lock); 1887 } 1888 #endif /* BCMETH_MPSAFETX */ 1889 1890 void 1891 bcmeth_soft_intr(void *arg) 1892 { 1893 struct bcmeth_softc * const sc = arg; 1894 struct ifnet * const ifp = &sc->sc_if; 1895 uint32_t intmask = 0; 1896 1897 mutex_enter(sc->sc_lock); 1898 1899 u_int soft_flags = atomic_swap_uint(&sc->sc_soft_flags, 0); 1900 1901 BCMETH_EVCNT_INCR(sc->sc_ev_soft_intr); 1902 1903 if ((soft_flags & SOFT_TXINTR) 1904 || bcmeth_txq_active_p(sc, &sc->sc_txq)) { 1905 /* 1906 * Let's do what we came here for. Consume transmitted 1907 * packets off the the transmit ring. 1908 */ 1909 if (!bcmeth_txq_consume(sc, &sc->sc_txq) 1910 || !bcmeth_txq_enqueue(sc, &sc->sc_txq)) { 1911 BCMETH_EVCNT_INCR(sc->sc_ev_tx_stall); 1912 ifp->if_flags |= IFF_OACTIVE; 1913 } else { 1914 ifp->if_flags &= ~IFF_OACTIVE; 1915 } 1916 intmask |= XMTINT_0; 1917 } 1918 1919 if (soft_flags & SOFT_RXINTR) { 1920 /* 1921 * Let's consume 1922 */ 1923 while (bcmeth_rxq_consume(sc, &sc->sc_rxq, 1924 sc->sc_rxq.rxq_threshold / 4)) { 1925 /* 1926 * We've consumed a quarter of the ring and still have 1927 * more to do. Refill the ring. 1928 */ 1929 bcmeth_rxq_produce(sc, &sc->sc_rxq); 1930 } 1931 intmask |= RCVINT; 1932 } 1933 1934 if (ifp->if_flags & IFF_RUNNING) { 1935 bcmeth_rxq_produce(sc, &sc->sc_rxq); 1936 mutex_spin_enter(sc->sc_hwlock); 1937 sc->sc_intmask |= intmask; 1938 bcmeth_write_4(sc, GMAC_INTMASK, sc->sc_intmask); 1939 mutex_spin_exit(sc->sc_hwlock); 1940 } 1941 1942 mutex_exit(sc->sc_lock); 1943 } 1944 1945 void 1946 bcmeth_worker(struct work *wk, void *arg) 1947 { 1948 struct bcmeth_softc * const sc = arg; 1949 struct ifnet * const ifp = &sc->sc_if; 1950 uint32_t intmask = 0; 1951 1952 mutex_enter(sc->sc_lock); 1953 1954 BCMETH_EVCNT_INCR(sc->sc_ev_work); 1955 1956 uint32_t work_flags = atomic_swap_32(&sc->sc_work_flags, 0); 1957 if (work_flags & WORK_REINIT) { 1958 int s = splnet(); 1959 sc->sc_soft_flags = 0; 1960 bcmeth_ifinit(ifp); 1961 splx(s); 1962 work_flags &= ~WORK_RXUNDERFLOW; 1963 } 1964 1965 if (work_flags & WORK_RXUNDERFLOW) { 1966 struct bcmeth_rxqueue * const rxq = &sc->sc_rxq; 1967 size_t threshold = 5 * rxq->rxq_threshold / 4; 1968 if (threshold >= rxq->rxq_last - rxq->rxq_first) { 1969 threshold = rxq->rxq_last - rxq->rxq_first - 1; 1970 } else { 1971 intmask |= RCVDESCUF; 1972 } 1973 aprint_normal_dev(sc->sc_dev, 1974 "increasing receive buffers from %zu to %zu\n", 1975 rxq->rxq_threshold, threshold); 1976 rxq->rxq_threshold = threshold; 1977 } 1978 1979 if (work_flags & WORK_RXINTR) { 1980 /* 1981 * Let's consume 1982 */ 1983 while (bcmeth_rxq_consume(sc, &sc->sc_rxq, 1984 sc->sc_rxq.rxq_threshold / 4)) { 1985 /* 1986 * We've consumed a quarter of the ring and still have 1987 * more to do. Refill the ring. 1988 */ 1989 bcmeth_rxq_produce(sc, &sc->sc_rxq); 1990 } 1991 intmask |= RCVINT; 1992 } 1993 1994 if (ifp->if_flags & IFF_RUNNING) { 1995 bcmeth_rxq_produce(sc, &sc->sc_rxq); 1996 #if 0 1997 uint32_t intstatus = bcmeth_read_4(sc, GMAC_INTSTATUS); 1998 if (intstatus & RCVINT) { 1999 bcmeth_write_4(sc, GMAC_INTSTATUS, RCVINT); 2000 work_flags |= WORK_RXINTR; 2001 continue; 2002 } 2003 #endif 2004 mutex_spin_enter(sc->sc_hwlock); 2005 sc->sc_intmask |= intmask; 2006 bcmeth_write_4(sc, GMAC_INTMASK, sc->sc_intmask); 2007 mutex_spin_exit(sc->sc_hwlock); 2008 } 2009 2010 mutex_exit(sc->sc_lock); 2011 } 2012
Indexes created Mon Sep 29 21:09:56 GMT 2025