1 /* $NetBSD: if_emac.c,v 1.59 2024/02/10 09:30:05 andvar Exp $ */ 2 3 /* 4 * Copyright 2001, 2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Simon Burge and Jason Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * emac(4) supports following ibm4xx's EMACs. 40 * XXXX: ZMII and 'TCP Accelaration Hardware' not support yet... 41 * 42 * tested 43 * ------ 44 * 405EP - 10/100 x2 45 * 405EX/EXr o 10/100/1000 x2 (EXr x1), STA v2, 256bit hash-Table, RGMII 46 * 405GP/GPr o 10/100 47 * 440EP - 10/100 x2, ZMII 48 * 440GP - 10/100 x2, ZMII 49 * 440GX - 10/100/1000 x4, ZMII/RGMII(ch 2, 3), TAH(ch 2, 3) 50 * 440SP - 10/100/1000 51 * 440SPe - 10/100/1000, STA v2 52 */ 53 54 #include <sys/cdefs.h> 55 __KERNEL_RCSID(0, "$NetBSD: if_emac.c,v 1.59 2024/02/10 09:30:05 andvar Exp $"); 56 57 #ifdef _KERNEL_OPT 58 #include "opt_emac.h" 59 #endif 60 61 #include <sys/param.h> 62 #include <sys/systm.h> 63 #include <sys/mbuf.h> 64 #include <sys/kernel.h> 65 #include <sys/socket.h> 66 #include <sys/ioctl.h> 67 #include <sys/cpu.h> 68 #include <sys/device.h> 69 70 #include <sys/rndsource.h> 71 72 #include <uvm/uvm_extern.h> /* for PAGE_SIZE */ 73 74 #include <net/if.h> 75 #include <net/if_dl.h> 76 #include <net/if_media.h> 77 #include <net/if_ether.h> 78 79 #include <net/bpf.h> 80 81 #include <powerpc/ibm4xx/cpu.h> 82 #include <powerpc/ibm4xx/dcr4xx.h> 83 #include <powerpc/ibm4xx/mal405gp.h> 84 #include <powerpc/ibm4xx/dev/emacreg.h> 85 #include <powerpc/ibm4xx/dev/if_emacreg.h> 86 #include <powerpc/ibm4xx/dev/if_emacvar.h> 87 #include <powerpc/ibm4xx/dev/malvar.h> 88 #include <powerpc/ibm4xx/dev/opbreg.h> 89 #include <powerpc/ibm4xx/dev/opbvar.h> 90 #include <powerpc/ibm4xx/dev/plbvar.h> 91 #if defined(EMAC_ZMII_PHY) || defined(EMAC_RGMII_PHY) 92 #include <powerpc/ibm4xx/dev/rmiivar.h> 93 #endif 94 95 #include <dev/mii/miivar.h> 96 97 #include "locators.h" 98 99 100 /* 101 * Transmit descriptor list size. There are two Tx channels, each with 102 * up to 256 hardware descriptors available. We currently use one Tx 103 * channel. We tell the upper layers that they can queue a lot of 104 * packets, and we go ahead and manage up to 64 of them at a time. We 105 * allow up to 16 DMA segments per packet. 106 */ 107 #define EMAC_NTXSEGS 16 108 #define EMAC_TXQUEUELEN 64 109 #define EMAC_TXQUEUELEN_MASK (EMAC_TXQUEUELEN - 1) 110 #define EMAC_TXQUEUE_GC (EMAC_TXQUEUELEN / 4) 111 #define EMAC_NTXDESC 256 112 #define EMAC_NTXDESC_MASK (EMAC_NTXDESC - 1) 113 #define EMAC_NEXTTX(x) (((x) + 1) & EMAC_NTXDESC_MASK) 114 #define EMAC_NEXTTXS(x) (((x) + 1) & EMAC_TXQUEUELEN_MASK) 115 116 /* 117 * Receive descriptor list size. There is one Rx channel with up to 256 118 * hardware descriptors available. We allocate 64 receive descriptors, 119 * each with a 2k buffer (MCLBYTES). 120 */ 121 #define EMAC_NRXDESC 64 122 #define EMAC_NRXDESC_MASK (EMAC_NRXDESC - 1) 123 #define EMAC_NEXTRX(x) (((x) + 1) & EMAC_NRXDESC_MASK) 124 #define EMAC_PREVRX(x) (((x) - 1) & EMAC_NRXDESC_MASK) 125 126 /* 127 * Transmit/receive descriptors that are DMA'd to the EMAC. 128 */ 129 struct emac_control_data { 130 struct mal_descriptor ecd_txdesc[EMAC_NTXDESC]; 131 struct mal_descriptor ecd_rxdesc[EMAC_NRXDESC]; 132 }; 133 134 #define EMAC_CDOFF(x) offsetof(struct emac_control_data, x) 135 #define EMAC_CDTXOFF(x) EMAC_CDOFF(ecd_txdesc[(x)]) 136 #define EMAC_CDRXOFF(x) EMAC_CDOFF(ecd_rxdesc[(x)]) 137 138 /* 139 * Software state for transmit jobs. 140 */ 141 struct emac_txsoft { 142 struct mbuf *txs_mbuf; /* head of mbuf chain */ 143 bus_dmamap_t txs_dmamap; /* our DMA map */ 144 int txs_firstdesc; /* first descriptor in packet */ 145 int txs_lastdesc; /* last descriptor in packet */ 146 int txs_ndesc; /* # of descriptors used */ 147 }; 148 149 /* 150 * Software state for receive descriptors. 151 */ 152 struct emac_rxsoft { 153 struct mbuf *rxs_mbuf; /* head of mbuf chain */ 154 bus_dmamap_t rxs_dmamap; /* our DMA map */ 155 }; 156 157 /* 158 * Software state per device. 159 */ 160 struct emac_softc { 161 device_t sc_dev; /* generic device information */ 162 int sc_instance; /* instance no. */ 163 bus_space_tag_t sc_st; /* bus space tag */ 164 bus_space_handle_t sc_sh; /* bus space handle */ 165 bus_dma_tag_t sc_dmat; /* bus DMA tag */ 166 struct ethercom sc_ethercom; /* ethernet common data */ 167 void *sc_sdhook; /* shutdown hook */ 168 void *sc_powerhook; /* power management hook */ 169 170 struct mii_data sc_mii; /* MII/media information */ 171 struct callout sc_callout; /* tick callout */ 172 173 uint32_t sc_mr1; /* copy of Mode Register 1 */ 174 uint32_t sc_stacr_read; /* Read opcode of STAOPC of STACR */ 175 uint32_t sc_stacr_write; /* Write opcode of STAOPC of STACR */ 176 uint32_t sc_stacr_bits; /* misc bits of STACR */ 177 bool sc_stacr_completed; /* Operation completed of STACR */ 178 int sc_htsize; /* Hash Table size */ 179 180 bus_dmamap_t sc_cddmamap; /* control data dma map */ 181 #define sc_cddma sc_cddmamap->dm_segs[0].ds_addr 182 183 /* Software state for transmit/receive descriptors. */ 184 struct emac_txsoft sc_txsoft[EMAC_TXQUEUELEN]; 185 struct emac_rxsoft sc_rxsoft[EMAC_NRXDESC]; 186 187 /* Control data structures. */ 188 struct emac_control_data *sc_control_data; 189 #define sc_txdescs sc_control_data->ecd_txdesc 190 #define sc_rxdescs sc_control_data->ecd_rxdesc 191 192 #ifdef EMAC_EVENT_COUNTERS 193 struct evcnt sc_ev_rxintr; /* Rx interrupts */ 194 struct evcnt sc_ev_txintr; /* Tx interrupts */ 195 struct evcnt sc_ev_rxde; /* Rx descriptor interrupts */ 196 struct evcnt sc_ev_txde; /* Tx descriptor interrupts */ 197 struct evcnt sc_ev_intr; /* General EMAC interrupts */ 198 199 struct evcnt sc_ev_txreap; /* Calls to Tx descriptor reaper */ 200 struct evcnt sc_ev_txsstall; /* Tx stalled due to no txs */ 201 struct evcnt sc_ev_txdstall; /* Tx stalled due to no txd */ 202 struct evcnt sc_ev_txdrop; /* Tx packets dropped (too many segs) */ 203 struct evcnt sc_ev_tu; /* Tx underrun */ 204 #endif /* EMAC_EVENT_COUNTERS */ 205 206 int sc_txfree; /* number of free Tx descriptors */ 207 int sc_txnext; /* next ready Tx descriptor */ 208 209 int sc_txsfree; /* number of free Tx jobs */ 210 int sc_txsnext; /* next ready Tx job */ 211 int sc_txsdirty; /* dirty Tx jobs */ 212 213 int sc_rxptr; /* next ready RX descriptor/descsoft */ 214 215 krndsource_t rnd_source; /* random source */ 216 217 void (*sc_rmii_enable)(device_t, int); /* reduced MII enable */ 218 void (*sc_rmii_disable)(device_t, int); /* reduced MII disable*/ 219 void (*sc_rmii_speed)(device_t, int, int); /* reduced MII speed */ 220 }; 221 222 #ifdef EMAC_EVENT_COUNTERS 223 #define EMAC_EVCNT_INCR(ev) (ev)->ev_count++ 224 #else 225 #define EMAC_EVCNT_INCR(ev) /* nothing */ 226 #endif 227 228 #define EMAC_CDTXADDR(sc, x) ((sc)->sc_cddma + EMAC_CDTXOFF((x))) 229 #define EMAC_CDRXADDR(sc, x) ((sc)->sc_cddma + EMAC_CDRXOFF((x))) 230 231 #define EMAC_CDTXSYNC(sc, x, n, ops) \ 232 do { \ 233 int __x, __n; \ 234 \ 235 __x = (x); \ 236 __n = (n); \ 237 \ 238 /* If it will wrap around, sync to the end of the ring. */ \ 239 if ((__x + __n) > EMAC_NTXDESC) { \ 240 bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_cddmamap, \ 241 EMAC_CDTXOFF(__x), sizeof(struct mal_descriptor) * \ 242 (EMAC_NTXDESC - __x), (ops)); \ 243 __n -= (EMAC_NTXDESC - __x); \ 244 __x = 0; \ 245 } \ 246 \ 247 /* Now sync whatever is left. */ \ 248 bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_cddmamap, \ 249 EMAC_CDTXOFF(__x), sizeof(struct mal_descriptor) * __n, (ops)); \ 250 } while (/*CONSTCOND*/0) 251 252 #define EMAC_CDRXSYNC(sc, x, ops) \ 253 do { \ 254 bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_cddmamap, \ 255 EMAC_CDRXOFF((x)), sizeof(struct mal_descriptor), (ops)); \ 256 } while (/*CONSTCOND*/0) 257 258 #define EMAC_INIT_RXDESC(sc, x) \ 259 do { \ 260 struct emac_rxsoft *__rxs = &(sc)->sc_rxsoft[(x)]; \ 261 struct mal_descriptor *__rxd = &(sc)->sc_rxdescs[(x)]; \ 262 struct mbuf *__m = __rxs->rxs_mbuf; \ 263 \ 264 /* \ 265 * Note: We scoot the packet forward 2 bytes in the buffer \ 266 * so that the payload after the Ethernet header is aligned \ 267 * to a 4-byte boundary. \ 268 */ \ 269 __m->m_data = __m->m_ext.ext_buf + 2; \ 270 \ 271 __rxd->md_data = __rxs->rxs_dmamap->dm_segs[0].ds_addr + 2; \ 272 __rxd->md_data_len = __m->m_ext.ext_size - 2; \ 273 __rxd->md_stat_ctrl = MAL_RX_EMPTY | MAL_RX_INTERRUPT | \ 274 /* Set wrap on last descriptor. */ \ 275 (((x) == EMAC_NRXDESC - 1) ? MAL_RX_WRAP : 0); \ 276 EMAC_CDRXSYNC((sc), (x), BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); \ 277 } while (/*CONSTCOND*/0) 278 279 #define EMAC_WRITE(sc, reg, val) \ 280 bus_space_write_stream_4((sc)->sc_st, (sc)->sc_sh, (reg), (val)) 281 #define EMAC_READ(sc, reg) \ 282 bus_space_read_stream_4((sc)->sc_st, (sc)->sc_sh, (reg)) 283 284 #define EMAC_SET_FILTER(aht, crc) \ 285 do { \ 286 (aht)[3 - (((crc) >> 26) >> 4)] |= 1 << (((crc) >> 26) & 0xf); \ 287 } while (/*CONSTCOND*/0) 288 #define EMAC_SET_FILTER256(aht, crc) \ 289 do { \ 290 (aht)[7 - (((crc) >> 24) >> 5)] |= 1 << (((crc) >> 24) & 0x1f); \ 291 } while (/*CONSTCOND*/0) 292 293 static int emac_match(device_t, cfdata_t, void *); 294 static void emac_attach(device_t, device_t, void *); 295 296 static int emac_intr(void *); 297 static void emac_shutdown(void *); 298 299 static void emac_start(struct ifnet *); 300 static int emac_ioctl(struct ifnet *, u_long, void *); 301 static int emac_init(struct ifnet *); 302 static void emac_stop(struct ifnet *, int); 303 static void emac_watchdog(struct ifnet *); 304 305 static int emac_add_rxbuf(struct emac_softc *, int); 306 static void emac_rxdrain(struct emac_softc *); 307 static int emac_set_filter(struct emac_softc *); 308 static int emac_txreap(struct emac_softc *); 309 310 static void emac_soft_reset(struct emac_softc *); 311 static void emac_smart_reset(struct emac_softc *); 312 313 static int emac_mii_readreg(device_t, int, int, uint16_t *); 314 static int emac_mii_writereg(device_t, int, int, uint16_t); 315 static void emac_mii_statchg(struct ifnet *); 316 static uint32_t emac_mii_wait(struct emac_softc *); 317 static void emac_mii_tick(void *); 318 319 int emac_copy_small = 0; 320 321 CFATTACH_DECL_NEW(emac, sizeof(struct emac_softc), 322 emac_match, emac_attach, NULL, NULL); 323 324 325 static int 326 emac_match(device_t parent, cfdata_t cf, void *aux) 327 { 328 struct opb_attach_args *oaa = aux; 329 330 /* match only on-chip ethernet devices */ 331 if (strcmp(oaa->opb_name, cf->cf_name) == 0) 332 return 1; 333 334 return 0; 335 } 336 337 static void 338 emac_attach(device_t parent, device_t self, void *aux) 339 { 340 struct opb_attach_args *oaa = aux; 341 struct emac_softc *sc = device_private(self); 342 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 343 struct mii_data *mii = &sc->sc_mii; 344 const char * xname = device_xname(self); 345 bus_dma_segment_t seg; 346 int error, i, nseg, opb_freq, opbc, mii_phy = MII_PHY_ANY; 347 const uint8_t *enaddr; 348 prop_dictionary_t dict = device_properties(self); 349 prop_data_t ea; 350 351 bus_space_map(oaa->opb_bt, oaa->opb_addr, EMAC_NREG, 0, &sc->sc_sh); 352 353 sc->sc_dev = self; 354 sc->sc_instance = oaa->opb_instance; 355 sc->sc_st = oaa->opb_bt; 356 sc->sc_dmat = oaa->opb_dmat; 357 358 callout_init(&sc->sc_callout, 0); 359 360 aprint_naive("\n"); 361 aprint_normal(": Ethernet Media Access Controller\n"); 362 363 /* Fetch the Ethernet address. */ 364 ea = prop_dictionary_get(dict, "mac-address"); 365 if (ea == NULL) { 366 aprint_error_dev(self, "unable to get mac-address property\n"); 367 return; 368 } 369 KASSERT(prop_object_type(ea) == PROP_TYPE_DATA); 370 KASSERT(prop_data_size(ea) == ETHER_ADDR_LEN); 371 enaddr = prop_data_data_nocopy(ea); 372 aprint_normal_dev(self, "Ethernet address %s\n", ether_sprintf(enaddr)); 373 374 #if defined(EMAC_ZMII_PHY) || defined(EMAC_RGMII_PHY) 375 /* Fetch the MII offset. */ 376 prop_dictionary_get_uint32(dict, "mii-phy", &mii_phy); 377 378 #ifdef EMAC_ZMII_PHY 379 if (oaa->opb_flags & OPB_FLAGS_EMAC_RMII_ZMII) 380 zmii_attach(parent, sc->sc_instance, &sc->sc_rmii_enable, 381 &sc->sc_rmii_disable, &sc->sc_rmii_speed); 382 #endif 383 #ifdef EMAC_RGMII_PHY 384 if (oaa->opb_flags & OPB_FLAGS_EMAC_RMII_RGMII) 385 rgmii_attach(parent, sc->sc_instance, &sc->sc_rmii_enable, 386 &sc->sc_rmii_disable, &sc->sc_rmii_speed); 387 #endif 388 #endif 389 390 /* 391 * Allocate the control data structures, and create and load the 392 * DMA map for it. 393 */ 394 if ((error = bus_dmamem_alloc(sc->sc_dmat, 395 sizeof(struct emac_control_data), 0, 0, &seg, 1, &nseg, 0)) != 0) { 396 aprint_error_dev(self, 397 "unable to allocate control data, error = %d\n", error); 398 goto fail_0; 399 } 400 401 if ((error = bus_dmamem_map(sc->sc_dmat, &seg, nseg, 402 sizeof(struct emac_control_data), (void **)&sc->sc_control_data, 403 BUS_DMA_COHERENT)) != 0) { 404 aprint_error_dev(self, 405 "unable to map control data, error = %d\n", error); 406 goto fail_1; 407 } 408 409 if ((error = bus_dmamap_create(sc->sc_dmat, 410 sizeof(struct emac_control_data), 1, 411 sizeof(struct emac_control_data), 0, 0, &sc->sc_cddmamap)) != 0) { 412 aprint_error_dev(self, 413 "unable to create control data DMA map, error = %d\n", 414 error); 415 goto fail_2; 416 } 417 418 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_cddmamap, 419 sc->sc_control_data, sizeof(struct emac_control_data), NULL, 420 0)) != 0) { 421 aprint_error_dev(self, 422 "unable to load control data DMA map, error = %d\n", error); 423 goto fail_3; 424 } 425 426 /* 427 * Create the transmit buffer DMA maps. 428 */ 429 for (i = 0; i < EMAC_TXQUEUELEN; i++) { 430 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 431 EMAC_NTXSEGS, MCLBYTES, 0, 0, 432 &sc->sc_txsoft[i].txs_dmamap)) != 0) { 433 aprint_error_dev(self, 434 "unable to create tx DMA map %d, error = %d\n", 435 i, error); 436 goto fail_4; 437 } 438 } 439 440 /* 441 * Create the receive buffer DMA maps. 442 */ 443 for (i = 0; i < EMAC_NRXDESC; i++) { 444 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 1, 445 MCLBYTES, 0, 0, &sc->sc_rxsoft[i].rxs_dmamap)) != 0) { 446 aprint_error_dev(self, 447 "unable to create rx DMA map %d, error = %d\n", 448 i, error); 449 goto fail_5; 450 } 451 sc->sc_rxsoft[i].rxs_mbuf = NULL; 452 } 453 454 /* Soft Reset the EMAC. The chip to a known state. */ 455 emac_soft_reset(sc); 456 457 opb_freq = opb_get_frequency(); 458 switch (opb_freq) { 459 case 33333333: opbc = STACR_OPBC_33MHZ; break; 460 case 50000000: opbc = STACR_OPBC_50MHZ; break; 461 case 66666666: opbc = STACR_OPBC_66MHZ; break; 462 case 83333333: opbc = STACR_OPBC_83MHZ; break; 463 case 100000000: opbc = STACR_OPBC_100MHZ; break; 464 465 default: 466 if (opb_freq > 100000000) { 467 opbc = STACR_OPBC_A100MHZ; 468 break; 469 } 470 aprint_error_dev(self, "unsupported OPB frequency %dMHz\n", 471 opb_freq / 1000 / 1000); 472 goto fail_5; 473 } 474 if (oaa->opb_flags & OPB_FLAGS_EMAC_GBE) { 475 sc->sc_mr1 = 476 MR1_RFS_GBE(MR1__FS_16KB) | 477 MR1_TFS_GBE(MR1__FS_16KB) | 478 MR1_TR0_MULTIPLE | 479 MR1_OBCI(opbc); 480 sc->sc_ethercom.ec_capabilities |= ETHERCAP_JUMBO_MTU; 481 482 if (oaa->opb_flags & OPB_FLAGS_EMAC_STACV2) { 483 sc->sc_stacr_read = STACR_STAOPC_READ; 484 sc->sc_stacr_write = STACR_STAOPC_WRITE; 485 sc->sc_stacr_bits = STACR_OC; 486 sc->sc_stacr_completed = false; 487 } else { 488 sc->sc_stacr_read = STACR_READ; 489 sc->sc_stacr_write = STACR_WRITE; 490 sc->sc_stacr_completed = true; 491 } 492 } else { 493 /* 494 * Set up Mode Register 1 - set receive and transmit FIFOs to 495 * maximum size, allow transmit of multiple packets (only 496 * channel 0 is used). 497 * 498 * XXX: Allow pause packets?? 499 */ 500 sc->sc_mr1 = 501 MR1_RFS(MR1__FS_4KB) | 502 MR1_TFS(MR1__FS_2KB) | 503 MR1_TR0_MULTIPLE; 504 505 sc->sc_stacr_read = STACR_READ; 506 sc->sc_stacr_write = STACR_WRITE; 507 sc->sc_stacr_bits = STACR_OPBC(opbc); 508 sc->sc_stacr_completed = true; 509 } 510 511 intr_establish_xname(oaa->opb_irq, IST_LEVEL, IPL_NET, emac_intr, sc, 512 device_xname(self)); 513 mal_intr_establish(sc->sc_instance, sc); 514 515 if (oaa->opb_flags & OPB_FLAGS_EMAC_HT256) 516 sc->sc_htsize = 256; 517 else 518 sc->sc_htsize = 64; 519 520 /* Clear all interrupts */ 521 EMAC_WRITE(sc, EMAC_ISR, ISR_ALL); 522 523 /* 524 * Initialise the media structures. 525 */ 526 mii->mii_ifp = ifp; 527 mii->mii_readreg = emac_mii_readreg; 528 mii->mii_writereg = emac_mii_writereg; 529 mii->mii_statchg = emac_mii_statchg; 530 531 sc->sc_ethercom.ec_mii = mii; 532 ifmedia_init(&mii->mii_media, 0, ether_mediachange, ether_mediastatus); 533 mii_attach(self, mii, 0xffffffff, mii_phy, MII_OFFSET_ANY, 534 MIIF_DOPAUSE); 535 if (LIST_FIRST(&mii->mii_phys) == NULL) { 536 ifmedia_add(&mii->mii_media, IFM_ETHER | IFM_NONE, 0, NULL); 537 ifmedia_set(&mii->mii_media, IFM_ETHER | IFM_NONE); 538 } else 539 ifmedia_set(&mii->mii_media, IFM_ETHER | IFM_AUTO); 540 541 ifp = &sc->sc_ethercom.ec_if; 542 strcpy(ifp->if_xname, xname); 543 ifp->if_softc = sc; 544 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 545 ifp->if_start = emac_start; 546 ifp->if_ioctl = emac_ioctl; 547 ifp->if_init = emac_init; 548 ifp->if_stop = emac_stop; 549 ifp->if_watchdog = emac_watchdog; 550 IFQ_SET_READY(&ifp->if_snd); 551 552 /* 553 * We can support 802.1Q VLAN-sized frames. 554 */ 555 sc->sc_ethercom.ec_capabilities |= ETHERCAP_VLAN_MTU; 556 557 /* 558 * Attach the interface. 559 */ 560 if_attach(ifp); 561 if_deferred_start_init(ifp, NULL); 562 ether_ifattach(ifp, enaddr); 563 564 rnd_attach_source(&sc->rnd_source, xname, RND_TYPE_NET, 565 RND_FLAG_DEFAULT); 566 567 #ifdef EMAC_EVENT_COUNTERS 568 /* 569 * Attach the event counters. 570 */ 571 evcnt_attach_dynamic(&sc->sc_ev_txintr, EVCNT_TYPE_INTR, 572 NULL, xname, "txintr"); 573 evcnt_attach_dynamic(&sc->sc_ev_rxintr, EVCNT_TYPE_INTR, 574 NULL, xname, "rxintr"); 575 evcnt_attach_dynamic(&sc->sc_ev_txde, EVCNT_TYPE_INTR, 576 NULL, xname, "txde"); 577 evcnt_attach_dynamic(&sc->sc_ev_rxde, EVCNT_TYPE_INTR, 578 NULL, xname, "rxde"); 579 evcnt_attach_dynamic(&sc->sc_ev_intr, EVCNT_TYPE_INTR, 580 NULL, xname, "intr"); 581 582 evcnt_attach_dynamic(&sc->sc_ev_txreap, EVCNT_TYPE_MISC, 583 NULL, xname, "txreap"); 584 evcnt_attach_dynamic(&sc->sc_ev_txsstall, EVCNT_TYPE_MISC, 585 NULL, xname, "txsstall"); 586 evcnt_attach_dynamic(&sc->sc_ev_txdstall, EVCNT_TYPE_MISC, 587 NULL, xname, "txdstall"); 588 evcnt_attach_dynamic(&sc->sc_ev_txdrop, EVCNT_TYPE_MISC, 589 NULL, xname, "txdrop"); 590 evcnt_attach_dynamic(&sc->sc_ev_tu, EVCNT_TYPE_MISC, 591 NULL, xname, "tu"); 592 #endif /* EMAC_EVENT_COUNTERS */ 593 594 /* 595 * Make sure the interface is shutdown during reboot. 596 */ 597 sc->sc_sdhook = shutdownhook_establish(emac_shutdown, sc); 598 if (sc->sc_sdhook == NULL) 599 aprint_error_dev(self, 600 "WARNING: unable to establish shutdown hook\n"); 601 602 return; 603 604 /* 605 * Free any resources we've allocated during the failed attach 606 * attempt. Do this in reverse order and fall through. 607 */ 608 fail_5: 609 for (i = 0; i < EMAC_NRXDESC; i++) { 610 if (sc->sc_rxsoft[i].rxs_dmamap != NULL) 611 bus_dmamap_destroy(sc->sc_dmat, 612 sc->sc_rxsoft[i].rxs_dmamap); 613 } 614 fail_4: 615 for (i = 0; i < EMAC_TXQUEUELEN; i++) { 616 if (sc->sc_txsoft[i].txs_dmamap != NULL) 617 bus_dmamap_destroy(sc->sc_dmat, 618 sc->sc_txsoft[i].txs_dmamap); 619 } 620 bus_dmamap_unload(sc->sc_dmat, sc->sc_cddmamap); 621 fail_3: 622 bus_dmamap_destroy(sc->sc_dmat, sc->sc_cddmamap); 623 fail_2: 624 bus_dmamem_unmap(sc->sc_dmat, (void *)sc->sc_control_data, 625 sizeof(struct emac_control_data)); 626 fail_1: 627 bus_dmamem_free(sc->sc_dmat, &seg, nseg); 628 fail_0: 629 return; 630 } 631 632 /* 633 * EMAC General interrupt handler 634 */ 635 static int 636 emac_intr(void *arg) 637 { 638 struct emac_softc *sc = arg; 639 uint32_t status; 640 641 EMAC_EVCNT_INCR(&sc->sc_ev_intr); 642 status = EMAC_READ(sc, EMAC_ISR); 643 644 /* Clear the interrupt status bits. */ 645 EMAC_WRITE(sc, EMAC_ISR, status); 646 647 return 1; 648 } 649 650 static void 651 emac_shutdown(void *arg) 652 { 653 struct emac_softc *sc = arg; 654 655 emac_stop(&sc->sc_ethercom.ec_if, 0); 656 } 657 658 659 /* 660 * ifnet interface functions 661 */ 662 663 static void 664 emac_start(struct ifnet *ifp) 665 { 666 struct emac_softc *sc = ifp->if_softc; 667 struct mbuf *m0; 668 struct emac_txsoft *txs; 669 bus_dmamap_t dmamap; 670 int error, firsttx, nexttx, lasttx, ofree, seg; 671 672 lasttx = 0; /* XXX gcc */ 673 674 if ((ifp->if_flags & IFF_RUNNING) == 0) 675 return; 676 677 /* 678 * Remember the previous number of free descriptors. 679 */ 680 ofree = sc->sc_txfree; 681 682 /* 683 * Loop through the send queue, setting up transmit descriptors 684 * until we drain the queue, or use up all available transmit 685 * descriptors. 686 */ 687 for (;;) { 688 /* Grab a packet off the queue. */ 689 IFQ_POLL(&ifp->if_snd, m0); 690 if (m0 == NULL) 691 break; 692 693 /* 694 * Get a work queue entry. Reclaim used Tx descriptors if 695 * we are running low. 696 */ 697 if (sc->sc_txsfree < EMAC_TXQUEUE_GC) { 698 emac_txreap(sc); 699 if (sc->sc_txsfree == 0) { 700 EMAC_EVCNT_INCR(&sc->sc_ev_txsstall); 701 break; 702 } 703 } 704 705 txs = &sc->sc_txsoft[sc->sc_txsnext]; 706 dmamap = txs->txs_dmamap; 707 708 /* 709 * Load the DMA map. If this fails, the packet either 710 * didn't fit in the allotted number of segments, or we 711 * were short on resources. In this case, we'll copy 712 * and try again. 713 */ 714 error = bus_dmamap_load_mbuf(sc->sc_dmat, dmamap, m0, 715 BUS_DMA_WRITE | BUS_DMA_NOWAIT); 716 if (error) { 717 if (error == EFBIG) { 718 EMAC_EVCNT_INCR(&sc->sc_ev_txdrop); 719 aprint_error_ifnet(ifp, 720 "Tx packet consumes too many " 721 "DMA segments, dropping...\n"); 722 IFQ_DEQUEUE(&ifp->if_snd, m0); 723 m_freem(m0); 724 continue; 725 } 726 /* Short on resources, just stop for now. */ 727 break; 728 } 729 730 /* 731 * Ensure we have enough descriptors free to describe 732 * the packet. 733 */ 734 if (dmamap->dm_nsegs > sc->sc_txfree) { 735 /* 736 * Not enough free descriptors to transmit this 737 * packet. We haven't committed anything yet, 738 * so just unload the DMA map, put the packet 739 * back on the queue, and punt. Notify the upper 740 * layer that there are not more slots left. 741 * 742 */ 743 bus_dmamap_unload(sc->sc_dmat, dmamap); 744 EMAC_EVCNT_INCR(&sc->sc_ev_txdstall); 745 break; 746 } 747 748 IFQ_DEQUEUE(&ifp->if_snd, m0); 749 750 /* 751 * WE ARE NOW COMMITTED TO TRANSMITTING THE PACKET. 752 */ 753 754 /* Sync the DMA map. */ 755 bus_dmamap_sync(sc->sc_dmat, dmamap, 0, dmamap->dm_mapsize, 756 BUS_DMASYNC_PREWRITE); 757 758 /* 759 * Store a pointer to the packet so that we can free it 760 * later. 761 */ 762 txs->txs_mbuf = m0; 763 txs->txs_firstdesc = sc->sc_txnext; 764 txs->txs_ndesc = dmamap->dm_nsegs; 765 766 /* 767 * Initialize the transmit descriptor. 768 */ 769 firsttx = sc->sc_txnext; 770 for (nexttx = sc->sc_txnext, seg = 0; 771 seg < dmamap->dm_nsegs; 772 seg++, nexttx = EMAC_NEXTTX(nexttx)) { 773 struct mal_descriptor *txdesc = 774 &sc->sc_txdescs[nexttx]; 775 776 /* 777 * If this is the first descriptor we're 778 * enqueueing, don't set the TX_READY bit just 779 * yet. That could cause a race condition. 780 * We'll do it below. 781 */ 782 txdesc->md_data = dmamap->dm_segs[seg].ds_addr; 783 txdesc->md_data_len = dmamap->dm_segs[seg].ds_len; 784 txdesc->md_stat_ctrl = 785 (txdesc->md_stat_ctrl & MAL_TX_WRAP) | 786 (nexttx == firsttx ? 0 : MAL_TX_READY) | 787 EMAC_TXC_GFCS | EMAC_TXC_GPAD; 788 lasttx = nexttx; 789 } 790 791 /* Set the LAST bit on the last segment. */ 792 sc->sc_txdescs[lasttx].md_stat_ctrl |= MAL_TX_LAST; 793 794 /* 795 * Set up last segment descriptor to send an interrupt after 796 * that descriptor is transmitted, and bypass existing Tx 797 * descriptor reaping method (for now...). 798 */ 799 sc->sc_txdescs[lasttx].md_stat_ctrl |= MAL_TX_INTERRUPT; 800 801 802 txs->txs_lastdesc = lasttx; 803 804 /* Sync the descriptors we're using. */ 805 EMAC_CDTXSYNC(sc, sc->sc_txnext, dmamap->dm_nsegs, 806 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 807 808 /* 809 * The entire packet chain is set up. Give the 810 * first descriptor to the chip now. 811 */ 812 sc->sc_txdescs[firsttx].md_stat_ctrl |= MAL_TX_READY; 813 EMAC_CDTXSYNC(sc, firsttx, 1, 814 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 815 /* 816 * Tell the EMAC that a new packet is available. 817 */ 818 EMAC_WRITE(sc, EMAC_TMR0, TMR0_GNP0 | TMR0_TFAE_2); 819 820 /* Advance the tx pointer. */ 821 sc->sc_txfree -= txs->txs_ndesc; 822 sc->sc_txnext = nexttx; 823 824 sc->sc_txsfree--; 825 sc->sc_txsnext = EMAC_NEXTTXS(sc->sc_txsnext); 826 827 /* 828 * Pass the packet to any BPF listeners. 829 */ 830 bpf_mtap(ifp, m0, BPF_D_OUT); 831 } 832 833 if (sc->sc_txfree != ofree) 834 /* Set a watchdog timer in case the chip flakes out. */ 835 ifp->if_timer = 5; 836 } 837 838 static int 839 emac_ioctl(struct ifnet *ifp, u_long cmd, void *data) 840 { 841 struct emac_softc *sc = ifp->if_softc; 842 int s, error; 843 844 s = splnet(); 845 846 switch (cmd) { 847 case SIOCSIFMTU: 848 { 849 struct ifreq *ifr = (struct ifreq *)data; 850 int maxmtu; 851 852 if (sc->sc_ethercom.ec_capabilities & ETHERCAP_JUMBO_MTU) 853 maxmtu = EMAC_MAX_MTU; 854 else 855 maxmtu = ETHERMTU; 856 857 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 858 error = EINVAL; 859 else if ((error = ifioctl_common(ifp, cmd, data)) != ENETRESET) 860 break; 861 else if (ifp->if_flags & IFF_UP) 862 error = emac_init(ifp); 863 else 864 error = 0; 865 break; 866 } 867 868 default: 869 error = ether_ioctl(ifp, cmd, data); 870 if (error == ENETRESET) { 871 /* 872 * Multicast list has changed; set the hardware filter 873 * accordingly. 874 */ 875 if (ifp->if_flags & IFF_RUNNING) 876 error = emac_set_filter(sc); 877 else 878 error = 0; 879 } 880 } 881 882 /* try to get more packets going */ 883 emac_start(ifp); 884 885 splx(s); 886 return error; 887 } 888 889 static int 890 emac_init(struct ifnet *ifp) 891 { 892 struct emac_softc *sc = ifp->if_softc; 893 struct emac_rxsoft *rxs; 894 const uint8_t *enaddr = CLLADDR(ifp->if_sadl); 895 int error, i; 896 897 error = 0; 898 899 /* Cancel any pending I/O. */ 900 emac_stop(ifp, 0); 901 902 /* Reset the chip to a known state. */ 903 emac_soft_reset(sc); 904 905 /* 906 * Initialise the transmit descriptor ring. 907 */ 908 memset(sc->sc_txdescs, 0, sizeof(sc->sc_txdescs)); 909 /* set wrap on last descriptor */ 910 sc->sc_txdescs[EMAC_NTXDESC - 1].md_stat_ctrl |= MAL_TX_WRAP; 911 EMAC_CDTXSYNC(sc, 0, EMAC_NTXDESC, 912 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 913 sc->sc_txfree = EMAC_NTXDESC; 914 sc->sc_txnext = 0; 915 916 /* 917 * Initialise the transmit job descriptors. 918 */ 919 for (i = 0; i < EMAC_TXQUEUELEN; i++) 920 sc->sc_txsoft[i].txs_mbuf = NULL; 921 sc->sc_txsfree = EMAC_TXQUEUELEN; 922 sc->sc_txsnext = 0; 923 sc->sc_txsdirty = 0; 924 925 /* 926 * Initialise the receiver descriptor and receive job 927 * descriptor rings. 928 */ 929 for (i = 0; i < EMAC_NRXDESC; i++) { 930 rxs = &sc->sc_rxsoft[i]; 931 if (rxs->rxs_mbuf == NULL) { 932 if ((error = emac_add_rxbuf(sc, i)) != 0) { 933 aprint_error_ifnet(ifp, 934 "unable to allocate or map rx buffer %d," 935 " error = %d\n", 936 i, error); 937 /* 938 * XXX Should attempt to run with fewer receive 939 * XXX buffers instead of just failing. 940 */ 941 emac_rxdrain(sc); 942 goto out; 943 } 944 } else 945 EMAC_INIT_RXDESC(sc, i); 946 } 947 sc->sc_rxptr = 0; 948 949 /* 950 * Set the current media. 951 */ 952 if ((error = ether_mediachange(ifp)) != 0) 953 goto out; 954 955 /* 956 * Load the MAC address. 957 */ 958 EMAC_WRITE(sc, EMAC_IAHR, enaddr[0] << 8 | enaddr[1]); 959 EMAC_WRITE(sc, EMAC_IALR, 960 enaddr[2] << 24 | enaddr[3] << 16 | enaddr[4] << 8 | enaddr[5]); 961 962 /* Enable the transmit and receive channel on the MAL. */ 963 error = mal_start(sc->sc_instance, 964 EMAC_CDTXADDR(sc, 0), EMAC_CDRXADDR(sc, 0)); 965 if (error) 966 goto out; 967 968 sc->sc_mr1 &= ~MR1_JPSM; 969 if (ifp->if_mtu > ETHERMTU) 970 /* Enable Jumbo Packet Support Mode */ 971 sc->sc_mr1 |= MR1_JPSM; 972 973 /* Set fifos, media modes. */ 974 EMAC_WRITE(sc, EMAC_MR1, sc->sc_mr1); 975 976 /* 977 * Enable Individual and (possibly) Broadcast Address modes, 978 * runt packets, and strip padding. 979 */ 980 EMAC_WRITE(sc, EMAC_RMR, RMR_IAE | RMR_RRP | RMR_SP | RMR_TFAE_2 | 981 (ifp->if_flags & IFF_PROMISC ? RMR_PME : 0) | 982 (ifp->if_flags & IFF_BROADCAST ? RMR_BAE : 0)); 983 984 /* 985 * Set multicast filter. 986 */ 987 emac_set_filter(sc); 988 989 /* 990 * Set low- and urgent-priority request thresholds. 991 */ 992 EMAC_WRITE(sc, EMAC_TMR1, 993 ((7 << TMR1_TLR_SHIFT) & TMR1_TLR_MASK) | /* 16 word burst */ 994 ((15 << TMR1_TUR_SHIFT) & TMR1_TUR_MASK)); 995 /* 996 * Set Transmit Request Threshold Register. 997 */ 998 EMAC_WRITE(sc, EMAC_TRTR, TRTR_256); 999 1000 /* 1001 * Set high and low receive watermarks. 1002 */ 1003 EMAC_WRITE(sc, EMAC_RWMR, 1004 30 << RWMR_RLWM_SHIFT | 64 << RWMR_RLWM_SHIFT); 1005 1006 /* 1007 * Set frame gap. 1008 */ 1009 EMAC_WRITE(sc, EMAC_IPGVR, 8); 1010 1011 /* 1012 * Set interrupt status enable bits for EMAC. 1013 */ 1014 EMAC_WRITE(sc, EMAC_ISER, 1015 ISR_TXPE | /* TX Parity Error */ 1016 ISR_RXPE | /* RX Parity Error */ 1017 ISR_TXUE | /* TX Underrun Event */ 1018 ISR_RXOE | /* RX Overrun Event */ 1019 ISR_OVR | /* Overrun Error */ 1020 ISR_PP | /* Pause Packet */ 1021 ISR_BP | /* Bad Packet */ 1022 ISR_RP | /* Runt Packet */ 1023 ISR_SE | /* Short Event */ 1024 ISR_ALE | /* Alignment Error */ 1025 ISR_BFCS | /* Bad FCS */ 1026 ISR_PTLE | /* Packet Too Long Error */ 1027 ISR_ORE | /* Out of Range Error */ 1028 ISR_IRE | /* In Range Error */ 1029 ISR_SE0 | /* Signal Quality Error 0 (SQE) */ 1030 ISR_TE0 | /* Transmit Error 0 */ 1031 ISR_MOS | /* MMA Operation Succeeded */ 1032 ISR_MOF); /* MMA Operation Failed */ 1033 1034 /* 1035 * Enable the transmit and receive channel on the EMAC. 1036 */ 1037 EMAC_WRITE(sc, EMAC_MR0, MR0_TXE | MR0_RXE); 1038 1039 /* 1040 * Start the one second MII clock. 1041 */ 1042 callout_reset(&sc->sc_callout, hz, emac_mii_tick, sc); 1043 1044 /* 1045 * ... all done! 1046 */ 1047 ifp->if_flags |= IFF_RUNNING; 1048 1049 out: 1050 if (error) { 1051 ifp->if_flags &= ~IFF_RUNNING; 1052 ifp->if_timer = 0; 1053 aprint_error_ifnet(ifp, "interface not running\n"); 1054 } 1055 return error; 1056 } 1057 1058 static void 1059 emac_stop(struct ifnet *ifp, int disable) 1060 { 1061 struct emac_softc *sc = ifp->if_softc; 1062 struct emac_txsoft *txs; 1063 int i; 1064 1065 /* Stop the one second clock. */ 1066 callout_stop(&sc->sc_callout); 1067 1068 /* Down the MII */ 1069 mii_down(&sc->sc_mii); 1070 1071 /* Disable interrupts. */ 1072 EMAC_WRITE(sc, EMAC_ISER, 0); 1073 1074 /* Disable the receive and transmit channels. */ 1075 mal_stop(sc->sc_instance); 1076 1077 /* Disable the transmit enable and receive MACs. */ 1078 EMAC_WRITE(sc, EMAC_MR0, 1079 EMAC_READ(sc, EMAC_MR0) & ~(MR0_TXE | MR0_RXE)); 1080 1081 /* Release any queued transmit buffers. */ 1082 for (i = 0; i < EMAC_TXQUEUELEN; i++) { 1083 txs = &sc->sc_txsoft[i]; 1084 if (txs->txs_mbuf != NULL) { 1085 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 1086 m_freem(txs->txs_mbuf); 1087 txs->txs_mbuf = NULL; 1088 } 1089 } 1090 1091 if (disable) 1092 emac_rxdrain(sc); 1093 1094 /* 1095 * Mark the interface down and cancel the watchdog timer. 1096 */ 1097 ifp->if_flags &= ~IFF_RUNNING; 1098 ifp->if_timer = 0; 1099 } 1100 1101 static void 1102 emac_watchdog(struct ifnet *ifp) 1103 { 1104 struct emac_softc *sc = ifp->if_softc; 1105 1106 /* 1107 * Since we're not interrupting every packet, sweep 1108 * up before we report an error. 1109 */ 1110 emac_txreap(sc); 1111 1112 if (sc->sc_txfree != EMAC_NTXDESC) { 1113 aprint_error_ifnet(ifp, 1114 "device timeout (txfree %d txsfree %d txnext %d)\n", 1115 sc->sc_txfree, sc->sc_txsfree, sc->sc_txnext); 1116 if_statinc(ifp, if_oerrors); 1117 1118 /* Reset the interface. */ 1119 (void)emac_init(ifp); 1120 } else if (ifp->if_flags & IFF_DEBUG) 1121 aprint_error_ifnet(ifp, "recovered from device timeout\n"); 1122 1123 /* try to get more packets going */ 1124 emac_start(ifp); 1125 } 1126 1127 static int 1128 emac_add_rxbuf(struct emac_softc *sc, int idx) 1129 { 1130 struct emac_rxsoft *rxs = &sc->sc_rxsoft[idx]; 1131 struct mbuf *m; 1132 int error; 1133 1134 MGETHDR(m, M_DONTWAIT, MT_DATA); 1135 if (m == NULL) 1136 return ENOBUFS; 1137 1138 MCLGET(m, M_DONTWAIT); 1139 if ((m->m_flags & M_EXT) == 0) { 1140 m_freem(m); 1141 return ENOBUFS; 1142 } 1143 1144 if (rxs->rxs_mbuf != NULL) 1145 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 1146 1147 rxs->rxs_mbuf = m; 1148 1149 error = bus_dmamap_load(sc->sc_dmat, rxs->rxs_dmamap, 1150 m->m_ext.ext_buf, m->m_ext.ext_size, NULL, BUS_DMA_NOWAIT); 1151 if (error) { 1152 aprint_error_dev(sc->sc_dev, 1153 "can't load rx DMA map %d, error = %d\n", idx, error); 1154 panic("emac_add_rxbuf"); /* XXX */ 1155 } 1156 1157 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 1158 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 1159 1160 EMAC_INIT_RXDESC(sc, idx); 1161 1162 return 0; 1163 } 1164 1165 static void 1166 emac_rxdrain(struct emac_softc *sc) 1167 { 1168 struct emac_rxsoft *rxs; 1169 int i; 1170 1171 for (i = 0; i < EMAC_NRXDESC; i++) { 1172 rxs = &sc->sc_rxsoft[i]; 1173 if (rxs->rxs_mbuf != NULL) { 1174 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 1175 m_freem(rxs->rxs_mbuf); 1176 rxs->rxs_mbuf = NULL; 1177 } 1178 } 1179 } 1180 1181 static int 1182 emac_set_filter(struct emac_softc *sc) 1183 { 1184 struct ethercom *ec = &sc->sc_ethercom; 1185 struct ether_multistep step; 1186 struct ether_multi *enm; 1187 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1188 uint32_t rmr, crc, mask, tmp, reg, gaht[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; 1189 int regs, cnt = 0, i; 1190 1191 if (sc->sc_htsize == 256) { 1192 reg = EMAC_GAHT256(0); 1193 regs = 8; 1194 } else { 1195 reg = EMAC_GAHT64(0); 1196 regs = 4; 1197 } 1198 mask = (1ULL << (sc->sc_htsize / regs)) - 1; 1199 1200 rmr = EMAC_READ(sc, EMAC_RMR); 1201 rmr &= ~(RMR_PMME | RMR_MAE); 1202 ifp->if_flags &= ~IFF_ALLMULTI; 1203 1204 ETHER_LOCK(ec); 1205 ETHER_FIRST_MULTI(step, ec, enm); 1206 while (enm != NULL) { 1207 if (memcmp(enm->enm_addrlo, 1208 enm->enm_addrhi, ETHER_ADDR_LEN) != 0) { 1209 /* 1210 * We must listen to a range of multicast addresses. 1211 * For now, just accept all multicasts, rather than 1212 * trying to set only those filter bits needed to match 1213 * the range. (At this time, the only use of address 1214 * ranges is for IP multicast routing, for which the 1215 * range is big enough to require all bits set.) 1216 */ 1217 gaht[0] = gaht[1] = gaht[2] = gaht[3] = 1218 gaht[4] = gaht[5] = gaht[6] = gaht[7] = mask; 1219 break; 1220 } 1221 1222 crc = ether_crc32_be(enm->enm_addrlo, ETHER_ADDR_LEN); 1223 1224 if (sc->sc_htsize == 256) 1225 EMAC_SET_FILTER256(gaht, crc); 1226 else 1227 EMAC_SET_FILTER(gaht, crc); 1228 1229 ETHER_NEXT_MULTI(step, enm); 1230 cnt++; 1231 } 1232 ETHER_UNLOCK(ec); 1233 1234 for (i = 1, tmp = gaht[0]; i < regs; i++) 1235 tmp &= gaht[i]; 1236 if (tmp == mask) { 1237 /* All categories are true. */ 1238 ifp->if_flags |= IFF_ALLMULTI; 1239 rmr |= RMR_PMME; 1240 } else if (cnt != 0) { 1241 /* Some categories are true. */ 1242 for (i = 0; i < regs; i++) 1243 EMAC_WRITE(sc, reg + (i << 2), gaht[i]); 1244 rmr |= RMR_MAE; 1245 } 1246 EMAC_WRITE(sc, EMAC_RMR, rmr); 1247 1248 return 0; 1249 } 1250 1251 /* 1252 * Reap completed Tx descriptors. 1253 */ 1254 static int 1255 emac_txreap(struct emac_softc *sc) 1256 { 1257 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1258 struct emac_txsoft *txs; 1259 int handled, i; 1260 uint32_t txstat, count; 1261 1262 EMAC_EVCNT_INCR(&sc->sc_ev_txreap); 1263 handled = 0; 1264 1265 count = 0; 1266 /* 1267 * Go through our Tx list and free mbufs for those 1268 * frames that have been transmitted. 1269 */ 1270 for (i = sc->sc_txsdirty; sc->sc_txsfree != EMAC_TXQUEUELEN; 1271 i = EMAC_NEXTTXS(i), sc->sc_txsfree++) { 1272 txs = &sc->sc_txsoft[i]; 1273 1274 EMAC_CDTXSYNC(sc, txs->txs_lastdesc, 1275 txs->txs_dmamap->dm_nsegs, 1276 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1277 1278 txstat = sc->sc_txdescs[txs->txs_lastdesc].md_stat_ctrl; 1279 if (txstat & MAL_TX_READY) 1280 break; 1281 1282 handled = 1; 1283 1284 /* 1285 * Check for errors and collisions. 1286 */ 1287 if (txstat & (EMAC_TXS_UR | EMAC_TXS_ED)) 1288 if_statinc(ifp, if_oerrors); 1289 1290 #ifdef EMAC_EVENT_COUNTERS 1291 if (txstat & EMAC_TXS_UR) 1292 EMAC_EVCNT_INCR(&sc->sc_ev_tu); 1293 #endif /* EMAC_EVENT_COUNTERS */ 1294 1295 if (txstat & 1296 (EMAC_TXS_EC | EMAC_TXS_MC | EMAC_TXS_SC | EMAC_TXS_LC)) { 1297 if (txstat & EMAC_TXS_EC) 1298 if_statadd(ifp, if_collisions, 16); 1299 else if (txstat & EMAC_TXS_MC) 1300 if_statadd(ifp, if_collisions, 2); /* XXX? */ 1301 else if (txstat & EMAC_TXS_SC) 1302 if_statinc(ifp, if_collisions); 1303 if (txstat & EMAC_TXS_LC) 1304 if_statinc(ifp, if_collisions); 1305 } else 1306 if_statinc(ifp, if_opackets); 1307 1308 if (ifp->if_flags & IFF_DEBUG) { 1309 if (txstat & EMAC_TXS_ED) 1310 aprint_error_ifnet(ifp, "excessive deferral\n"); 1311 if (txstat & EMAC_TXS_EC) 1312 aprint_error_ifnet(ifp, 1313 "excessive collisions\n"); 1314 } 1315 1316 sc->sc_txfree += txs->txs_ndesc; 1317 bus_dmamap_sync(sc->sc_dmat, txs->txs_dmamap, 1318 0, txs->txs_dmamap->dm_mapsize, BUS_DMASYNC_POSTWRITE); 1319 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 1320 m_freem(txs->txs_mbuf); 1321 txs->txs_mbuf = NULL; 1322 1323 count++; 1324 } 1325 1326 /* Update the dirty transmit buffer pointer. */ 1327 sc->sc_txsdirty = i; 1328 1329 /* 1330 * If there are no more pending transmissions, cancel the watchdog 1331 * timer. 1332 */ 1333 if (sc->sc_txsfree == EMAC_TXQUEUELEN) 1334 ifp->if_timer = 0; 1335 1336 if (count != 0) 1337 rnd_add_uint32(&sc->rnd_source, count); 1338 1339 return handled; 1340 } 1341 1342 1343 /* 1344 * Reset functions 1345 */ 1346 1347 static void 1348 emac_soft_reset(struct emac_softc *sc) 1349 { 1350 uint32_t sdr; 1351 int t = 0; 1352 1353 /* 1354 * The PHY must provide a TX Clk in order perform a soft reset the 1355 * EMAC. If none is present, select the internal clock, 1356 * SDR0_MFR[E0CS, E1CS]. After the soft reset, select the external 1357 * clock. 1358 */ 1359 1360 sdr = mfsdr(DCR_SDR0_MFR); 1361 sdr |= SDR0_MFR_ECS(sc->sc_instance); 1362 mtsdr(DCR_SDR0_MFR, sdr); 1363 1364 EMAC_WRITE(sc, EMAC_MR0, MR0_SRST); 1365 1366 sdr = mfsdr(DCR_SDR0_MFR); 1367 sdr &= ~SDR0_MFR_ECS(sc->sc_instance); 1368 mtsdr(DCR_SDR0_MFR, sdr); 1369 1370 delay(5); 1371 1372 /* wait finish */ 1373 while (EMAC_READ(sc, EMAC_MR0) & MR0_SRST) { 1374 if (++t == 1000000 /* 1sec XXXXX */) { 1375 aprint_error_dev(sc->sc_dev, "Soft Reset failed\n"); 1376 return; 1377 } 1378 delay(1); 1379 } 1380 } 1381 1382 static void 1383 emac_smart_reset(struct emac_softc *sc) 1384 { 1385 uint32_t mr0; 1386 int t = 0; 1387 1388 mr0 = EMAC_READ(sc, EMAC_MR0); 1389 if (mr0 & (MR0_TXE | MR0_RXE)) { 1390 mr0 &= ~(MR0_TXE | MR0_RXE); 1391 EMAC_WRITE(sc, EMAC_MR0, mr0); 1392 1393 /* wait idel state */ 1394 while ((EMAC_READ(sc, EMAC_MR0) & (MR0_TXI | MR0_RXI)) != 1395 (MR0_TXI | MR0_RXI)) { 1396 if (++t == 1000000 /* 1sec XXXXX */) { 1397 aprint_error_dev(sc->sc_dev, 1398 "Smart Reset failed\n"); 1399 return; 1400 } 1401 delay(1); 1402 } 1403 } 1404 } 1405 1406 1407 /* 1408 * MII related functions 1409 */ 1410 1411 static int 1412 emac_mii_readreg(device_t self, int phy, int reg, uint16_t *val) 1413 { 1414 struct emac_softc *sc = device_private(self); 1415 uint32_t sta_reg; 1416 int rv; 1417 1418 if (sc->sc_rmii_enable) 1419 sc->sc_rmii_enable(device_parent(self), sc->sc_instance); 1420 1421 /* wait for PHY data transfer to complete */ 1422 if ((rv = emac_mii_wait(sc)) != 0) 1423 goto fail; 1424 1425 sta_reg = 1426 sc->sc_stacr_read | 1427 (reg << STACR_PRA_SHIFT) | 1428 (phy << STACR_PCDA_SHIFT) | 1429 sc->sc_stacr_bits; 1430 EMAC_WRITE(sc, EMAC_STACR, sta_reg); 1431 1432 if ((rv = emac_mii_wait(sc)) != 0) 1433 goto fail; 1434 sta_reg = EMAC_READ(sc, EMAC_STACR); 1435 1436 if (sta_reg & STACR_PHYE) { 1437 rv = -1; 1438 goto fail; 1439 } 1440 *val = sta_reg >> STACR_PHYD_SHIFT; 1441 1442 fail: 1443 if (sc->sc_rmii_disable) 1444 sc->sc_rmii_disable(device_parent(self), sc->sc_instance); 1445 return rv; 1446 } 1447 1448 static int 1449 emac_mii_writereg(device_t self, int phy, int reg, uint16_t val) 1450 { 1451 struct emac_softc *sc = device_private(self); 1452 uint32_t sta_reg; 1453 int rv; 1454 1455 if (sc->sc_rmii_enable) 1456 sc->sc_rmii_enable(device_parent(self), sc->sc_instance); 1457 1458 /* wait for PHY data transfer to complete */ 1459 if ((rv = emac_mii_wait(sc)) != 0) 1460 goto out; 1461 1462 sta_reg = 1463 (val << STACR_PHYD_SHIFT) | 1464 sc->sc_stacr_write | 1465 (reg << STACR_PRA_SHIFT) | 1466 (phy << STACR_PCDA_SHIFT) | 1467 sc->sc_stacr_bits; 1468 EMAC_WRITE(sc, EMAC_STACR, sta_reg); 1469 1470 if ((rv = emac_mii_wait(sc)) != 0) 1471 goto out; 1472 if (EMAC_READ(sc, EMAC_STACR) & STACR_PHYE) { 1473 aprint_error_dev(sc->sc_dev, "MII PHY Error\n"); 1474 rv = -1; 1475 } 1476 1477 out: 1478 if (sc->sc_rmii_disable) 1479 sc->sc_rmii_disable(device_parent(self), sc->sc_instance); 1480 1481 return rv; 1482 } 1483 1484 static void 1485 emac_mii_statchg(struct ifnet *ifp) 1486 { 1487 struct emac_softc *sc = ifp->if_softc; 1488 struct mii_data *mii = &sc->sc_mii; 1489 1490 /* 1491 * MR1 can only be written immediately after a reset... 1492 */ 1493 emac_smart_reset(sc); 1494 1495 sc->sc_mr1 &= ~(MR1_FDE | MR1_ILE | MR1_EIFC | MR1_MF_MASK | MR1_IST); 1496 if (mii->mii_media_active & IFM_FDX) 1497 sc->sc_mr1 |= (MR1_FDE | MR1_EIFC | MR1_IST); 1498 if (mii->mii_media_active & IFM_FLOW) 1499 sc->sc_mr1 |= MR1_EIFC; 1500 if (mii->mii_media_active & IFM_LOOP) 1501 sc->sc_mr1 |= MR1_ILE; 1502 switch (IFM_SUBTYPE(mii->mii_media_active)) { 1503 case IFM_1000_T: 1504 sc->sc_mr1 |= (MR1_MF_1000MBS | MR1_IST); 1505 break; 1506 1507 case IFM_100_TX: 1508 sc->sc_mr1 |= (MR1_MF_100MBS | MR1_IST); 1509 break; 1510 1511 case IFM_10_T: 1512 sc->sc_mr1 |= MR1_MF_10MBS; 1513 break; 1514 1515 case IFM_NONE: 1516 break; 1517 1518 default: 1519 aprint_error_dev(sc->sc_dev, "unknown sub-type %d\n", 1520 IFM_SUBTYPE(mii->mii_media_active)); 1521 break; 1522 } 1523 if (sc->sc_rmii_speed) 1524 sc->sc_rmii_speed(device_parent(sc->sc_dev), sc->sc_instance, 1525 IFM_SUBTYPE(mii->mii_media_active)); 1526 1527 EMAC_WRITE(sc, EMAC_MR1, sc->sc_mr1); 1528 1529 /* Enable TX and RX if already RUNNING */ 1530 if (ifp->if_flags & IFF_RUNNING) 1531 EMAC_WRITE(sc, EMAC_MR0, MR0_TXE | MR0_RXE); 1532 } 1533 1534 static uint32_t 1535 emac_mii_wait(struct emac_softc *sc) 1536 { 1537 int i; 1538 uint32_t oc; 1539 1540 /* wait for PHY data transfer to complete */ 1541 i = 0; 1542 oc = EMAC_READ(sc, EMAC_STACR) & STACR_OC; 1543 while ((oc == STACR_OC) != sc->sc_stacr_completed) { 1544 delay(7); 1545 if (i++ > 5) { 1546 aprint_error_dev(sc->sc_dev, "MII timed out\n"); 1547 return ETIMEDOUT; 1548 } 1549 oc = EMAC_READ(sc, EMAC_STACR) & STACR_OC; 1550 } 1551 return 0; 1552 } 1553 1554 static void 1555 emac_mii_tick(void *arg) 1556 { 1557 struct emac_softc *sc = arg; 1558 int s; 1559 1560 if (!device_is_active(sc->sc_dev)) 1561 return; 1562 1563 s = splnet(); 1564 mii_tick(&sc->sc_mii); 1565 splx(s); 1566 1567 callout_reset(&sc->sc_callout, hz, emac_mii_tick, sc); 1568 } 1569 1570 int 1571 emac_txeob_intr(void *arg) 1572 { 1573 struct emac_softc *sc = arg; 1574 int handled = 0; 1575 1576 EMAC_EVCNT_INCR(&sc->sc_ev_txintr); 1577 handled |= emac_txreap(sc); 1578 1579 /* try to get more packets going */ 1580 if_schedule_deferred_start(&sc->sc_ethercom.ec_if); 1581 1582 return handled; 1583 } 1584 1585 int 1586 emac_rxeob_intr(void *arg) 1587 { 1588 struct emac_softc *sc = arg; 1589 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1590 struct emac_rxsoft *rxs; 1591 struct mbuf *m; 1592 uint32_t rxstat, count; 1593 int i, len; 1594 1595 EMAC_EVCNT_INCR(&sc->sc_ev_rxintr); 1596 1597 count = 0; 1598 for (i = sc->sc_rxptr; ; i = EMAC_NEXTRX(i)) { 1599 rxs = &sc->sc_rxsoft[i]; 1600 1601 EMAC_CDRXSYNC(sc, i, 1602 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1603 1604 rxstat = sc->sc_rxdescs[i].md_stat_ctrl; 1605 1606 if (rxstat & MAL_RX_EMPTY) { 1607 /* 1608 * We have processed all of the receive buffers. 1609 */ 1610 /* Flush current empty descriptor */ 1611 EMAC_CDRXSYNC(sc, i, 1612 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1613 break; 1614 } 1615 1616 /* 1617 * If an error occurred, update stats, clear the status 1618 * word, and leave the packet buffer in place. It will 1619 * simply be reused the next time the ring comes around. 1620 */ 1621 if (rxstat & (EMAC_RXS_OE | EMAC_RXS_BP | EMAC_RXS_SE | 1622 EMAC_RXS_AE | EMAC_RXS_BFCS | EMAC_RXS_PTL | EMAC_RXS_ORE | 1623 EMAC_RXS_IRE)) { 1624 #define PRINTERR(bit, str) \ 1625 if (rxstat & (bit)) \ 1626 aprint_error_ifnet(ifp, \ 1627 "receive error: %s\n", str) 1628 if_statinc(ifp, if_ierrors); 1629 PRINTERR(EMAC_RXS_OE, "overrun error"); 1630 PRINTERR(EMAC_RXS_BP, "bad packet"); 1631 PRINTERR(EMAC_RXS_RP, "runt packet"); 1632 PRINTERR(EMAC_RXS_SE, "short event"); 1633 PRINTERR(EMAC_RXS_AE, "alignment error"); 1634 PRINTERR(EMAC_RXS_BFCS, "bad FCS"); 1635 PRINTERR(EMAC_RXS_PTL, "packet too long"); 1636 PRINTERR(EMAC_RXS_ORE, "out of range error"); 1637 PRINTERR(EMAC_RXS_IRE, "in range error"); 1638 #undef PRINTERR 1639 EMAC_INIT_RXDESC(sc, i); 1640 continue; 1641 } 1642 1643 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 1644 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_POSTREAD); 1645 1646 /* 1647 * No errors; receive the packet. Note, the 405GP emac 1648 * includes the CRC with every packet. 1649 */ 1650 len = sc->sc_rxdescs[i].md_data_len - ETHER_CRC_LEN; 1651 1652 /* 1653 * If the packet is small enough to fit in a 1654 * single header mbuf, allocate one and copy 1655 * the data into it. This greatly reduces 1656 * memory consumption when we receive lots 1657 * of small packets. 1658 * 1659 * Otherwise, we add a new buffer to the receive 1660 * chain. If this fails, we drop the packet and 1661 * recycle the old buffer. 1662 */ 1663 if (emac_copy_small != 0 && len <= MHLEN) { 1664 MGETHDR(m, M_DONTWAIT, MT_DATA); 1665 if (m == NULL) 1666 goto dropit; 1667 memcpy(mtod(m, void *), 1668 mtod(rxs->rxs_mbuf, void *), len); 1669 EMAC_INIT_RXDESC(sc, i); 1670 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 1671 rxs->rxs_dmamap->dm_mapsize, 1672 BUS_DMASYNC_PREREAD); 1673 } else { 1674 m = rxs->rxs_mbuf; 1675 if (emac_add_rxbuf(sc, i) != 0) { 1676 dropit: 1677 if_statinc(ifp, if_ierrors); 1678 EMAC_INIT_RXDESC(sc, i); 1679 bus_dmamap_sync(sc->sc_dmat, 1680 rxs->rxs_dmamap, 0, 1681 rxs->rxs_dmamap->dm_mapsize, 1682 BUS_DMASYNC_PREREAD); 1683 continue; 1684 } 1685 } 1686 1687 m_set_rcvif(m, ifp); 1688 m->m_pkthdr.len = m->m_len = len; 1689 1690 /* Pass it on. */ 1691 if_percpuq_enqueue(ifp->if_percpuq, m); 1692 1693 count++; 1694 } 1695 1696 /* Update the receive pointer. */ 1697 sc->sc_rxptr = i; 1698 1699 if (count != 0) 1700 rnd_add_uint32(&sc->rnd_source, count); 1701 1702 return 1; 1703 } 1704 1705 int 1706 emac_txde_intr(void *arg) 1707 { 1708 struct emac_softc *sc = arg; 1709 1710 EMAC_EVCNT_INCR(&sc->sc_ev_txde); 1711 aprint_error_dev(sc->sc_dev, "emac_txde_intr\n"); 1712 return 1; 1713 } 1714 1715 int 1716 emac_rxde_intr(void *arg) 1717 { 1718 struct emac_softc *sc = arg; 1719 int i; 1720 1721 EMAC_EVCNT_INCR(&sc->sc_ev_rxde); 1722 aprint_error_dev(sc->sc_dev, "emac_rxde_intr\n"); 1723 /* 1724 * XXX! 1725 * This is a bit drastic; we just drop all descriptors that aren't 1726 * "clean". We should probably send any that are up the stack. 1727 */ 1728 for (i = 0; i < EMAC_NRXDESC; i++) { 1729 EMAC_CDRXSYNC(sc, i, 1730 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1731 1732 if (sc->sc_rxdescs[i].md_data_len != MCLBYTES) 1733 EMAC_INIT_RXDESC(sc, i); 1734 } 1735 1736 return 1; 1737 } 1738
Indexes created Sat Sep 20 22:09:52 GMT 2025