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sys/dev/cas/if_cas.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (C) 2001 Eduardo Horvath. 5 * Copyright (c) 2001-2003 Thomas Moestl 6 * Copyright (c) 2007-2009 Marius Strobl <marius@FreeBSD.org> 7 * All rights reserved. 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 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * from: NetBSD: gem.c,v 1.21 2002/06/01 23:50:58 lukem Exp 31 * from: FreeBSD: if_gem.c 182060 2008-08-23 15:03:26Z marius 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 /* 38 * driver for Sun Cassini/Cassini+ and National Semiconductor DP83065 39 * Saturn Gigabit Ethernet controllers 40 */ 41 42 #if 0 43 #define CAS_DEBUG 44 #endif 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/bus.h> 49 #include <sys/callout.h> 50 #include <sys/endian.h> 51 #include <sys/mbuf.h> 52 #include <sys/malloc.h> 53 #include <sys/kernel.h> 54 #include <sys/lock.h> 55 #include <sys/module.h> 56 #include <sys/mutex.h> 57 #include <sys/refcount.h> 58 #include <sys/resource.h> 59 #include <sys/rman.h> 60 #include <sys/socket.h> 61 #include <sys/sockio.h> 62 #include <sys/taskqueue.h> 63 64 #include <net/bpf.h> 65 #include <net/ethernet.h> 66 #include <net/if.h> 67 #include <net/if_var.h> 68 #include <net/if_arp.h> 69 #include <net/if_dl.h> 70 #include <net/if_media.h> 71 #include <net/if_types.h> 72 #include <net/if_vlan_var.h> 73 74 #include <netinet/in.h> 75 #include <netinet/in_systm.h> 76 #include <netinet/ip.h> 77 #include <netinet/tcp.h> 78 #include <netinet/udp.h> 79 80 #include <machine/bus.h> 81 #if defined(__powerpc__) 82 #include <dev/ofw/ofw_bus.h> 83 #include <dev/ofw/openfirm.h> 84 #include <machine/ofw_machdep.h> 85 #endif 86 #include <machine/resource.h> 87 88 #include <dev/mii/mii.h> 89 #include <dev/mii/miivar.h> 90 91 #include <dev/cas/if_casreg.h> 92 #include <dev/cas/if_casvar.h> 93 94 #include <dev/pci/pcireg.h> 95 #include <dev/pci/pcivar.h> 96 97 #include "miibus_if.h" 98 99 #define RINGASSERT(n , min, max) \ 100 CTASSERT(powerof2(n) && (n) >= (min) && (n) <= (max)) 101 102 RINGASSERT(CAS_NRXCOMP, 128, 32768); 103 RINGASSERT(CAS_NRXDESC, 32, 8192); 104 RINGASSERT(CAS_NRXDESC2, 32, 8192); 105 RINGASSERT(CAS_NTXDESC, 32, 8192); 106 107 #undef RINGASSERT 108 109 #define CCDASSERT(m, a) \ 110 CTASSERT((offsetof(struct cas_control_data, m) & ((a) - 1)) == 0) 111 112 CCDASSERT(ccd_rxcomps, CAS_RX_COMP_ALIGN); 113 CCDASSERT(ccd_rxdescs, CAS_RX_DESC_ALIGN); 114 CCDASSERT(ccd_rxdescs2, CAS_RX_DESC_ALIGN); 115 116 #undef CCDASSERT 117 118 #define CAS_TRIES 10000 119 120 /* 121 * According to documentation, the hardware has support for basic TCP 122 * checksum offloading only, in practice this can be also used for UDP 123 * however (i.e. the problem of previous Sun NICs that a checksum of 0x0 124 * is not converted to 0xffff no longer exists). 125 */ 126 #define CAS_CSUM_FEATURES (CSUM_TCP | CSUM_UDP) 127 128 static inline void cas_add_rxdesc(struct cas_softc *sc, u_int idx); 129 static int cas_attach(struct cas_softc *sc); 130 static int cas_bitwait(struct cas_softc *sc, bus_addr_t r, uint32_t clr, 131 uint32_t set); 132 static void cas_cddma_callback(void *xsc, bus_dma_segment_t *segs, 133 int nsegs, int error); 134 static void cas_detach(struct cas_softc *sc); 135 static int cas_disable_rx(struct cas_softc *sc); 136 static int cas_disable_tx(struct cas_softc *sc); 137 static void cas_eint(struct cas_softc *sc, u_int status); 138 static void cas_free(struct mbuf *m); 139 static void cas_init(void *xsc); 140 static void cas_init_locked(struct cas_softc *sc); 141 static void cas_init_regs(struct cas_softc *sc); 142 static int cas_intr(void *v); 143 static void cas_intr_task(void *arg, int pending __unused); 144 static int cas_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data); 145 static int cas_load_txmbuf(struct cas_softc *sc, struct mbuf **m_head); 146 static int cas_mediachange(struct ifnet *ifp); 147 static void cas_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr); 148 static void cas_meminit(struct cas_softc *sc); 149 static void cas_mifinit(struct cas_softc *sc); 150 static int cas_mii_readreg(device_t dev, int phy, int reg); 151 static void cas_mii_statchg(device_t dev); 152 static int cas_mii_writereg(device_t dev, int phy, int reg, int val); 153 static void cas_reset(struct cas_softc *sc); 154 static int cas_reset_rx(struct cas_softc *sc); 155 static int cas_reset_tx(struct cas_softc *sc); 156 static void cas_resume(struct cas_softc *sc); 157 static u_int cas_descsize(u_int sz); 158 static void cas_rint(struct cas_softc *sc); 159 static void cas_rint_timeout(void *arg); 160 static inline void cas_rxcksum(struct mbuf *m, uint16_t cksum); 161 static inline void cas_rxcompinit(struct cas_rx_comp *rxcomp); 162 static u_int cas_rxcompsize(u_int sz); 163 static void cas_rxdma_callback(void *xsc, bus_dma_segment_t *segs, 164 int nsegs, int error); 165 static void cas_setladrf(struct cas_softc *sc); 166 static void cas_start(struct ifnet *ifp); 167 static void cas_stop(struct ifnet *ifp); 168 static void cas_suspend(struct cas_softc *sc); 169 static void cas_tick(void *arg); 170 static void cas_tint(struct cas_softc *sc); 171 static void cas_tx_task(void *arg, int pending __unused); 172 static inline void cas_txkick(struct cas_softc *sc); 173 static void cas_watchdog(struct cas_softc *sc); 174 175 MODULE_DEPEND(cas, ether, 1, 1, 1); 176 MODULE_DEPEND(cas, miibus, 1, 1, 1); 177 178 #ifdef CAS_DEBUG 179 #include <sys/ktr.h> 180 #define KTR_CAS KTR_SPARE2 181 #endif 182 183 static int 184 cas_attach(struct cas_softc *sc) 185 { 186 struct cas_txsoft *txs; 187 struct ifnet *ifp; 188 int error, i; 189 uint32_t v; 190 191 /* Set up ifnet structure. */ 192 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 193 if (ifp == NULL) 194 return (ENOSPC); 195 ifp->if_softc = sc; 196 if_initname(ifp, device_get_name(sc->sc_dev), 197 device_get_unit(sc->sc_dev)); 198 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 199 ifp->if_start = cas_start; 200 ifp->if_ioctl = cas_ioctl; 201 ifp->if_init = cas_init; 202 IFQ_SET_MAXLEN(&ifp->if_snd, CAS_TXQUEUELEN); 203 ifp->if_snd.ifq_drv_maxlen = CAS_TXQUEUELEN; 204 IFQ_SET_READY(&ifp->if_snd); 205 206 callout_init_mtx(&sc->sc_tick_ch, &sc->sc_mtx, 0); 207 callout_init_mtx(&sc->sc_rx_ch, &sc->sc_mtx, 0); 208 /* Create local taskq. */ 209 NET_TASK_INIT(&sc->sc_intr_task, 0, cas_intr_task, sc); 210 TASK_INIT(&sc->sc_tx_task, 1, cas_tx_task, ifp); 211 sc->sc_tq = taskqueue_create_fast("cas_taskq", M_WAITOK, 212 taskqueue_thread_enqueue, &sc->sc_tq); 213 if (sc->sc_tq == NULL) { 214 device_printf(sc->sc_dev, "could not create taskqueue\n"); 215 error = ENXIO; 216 goto fail_ifnet; 217 } 218 error = taskqueue_start_threads(&sc->sc_tq, 1, PI_NET, "%s taskq", 219 device_get_nameunit(sc->sc_dev)); 220 if (error != 0) { 221 device_printf(sc->sc_dev, "could not start threads\n"); 222 goto fail_taskq; 223 } 224 225 /* Make sure the chip is stopped. */ 226 cas_reset(sc); 227 228 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0, 229 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 230 BUS_SPACE_MAXSIZE, 0, BUS_SPACE_MAXSIZE, 0, NULL, NULL, 231 &sc->sc_pdmatag); 232 if (error != 0) 233 goto fail_taskq; 234 235 error = bus_dma_tag_create(sc->sc_pdmatag, 1, 0, 236 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 237 CAS_PAGE_SIZE, 1, CAS_PAGE_SIZE, 0, NULL, NULL, &sc->sc_rdmatag); 238 if (error != 0) 239 goto fail_ptag; 240 241 error = bus_dma_tag_create(sc->sc_pdmatag, 1, 0, 242 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 243 MCLBYTES * CAS_NTXSEGS, CAS_NTXSEGS, MCLBYTES, 244 BUS_DMA_ALLOCNOW, NULL, NULL, &sc->sc_tdmatag); 245 if (error != 0) 246 goto fail_rtag; 247 248 error = bus_dma_tag_create(sc->sc_pdmatag, CAS_TX_DESC_ALIGN, 0, 249 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 250 sizeof(struct cas_control_data), 1, 251 sizeof(struct cas_control_data), 0, 252 NULL, NULL, &sc->sc_cdmatag); 253 if (error != 0) 254 goto fail_ttag; 255 256 /* 257 * Allocate the control data structures, create and load the 258 * DMA map for it. 259 */ 260 if ((error = bus_dmamem_alloc(sc->sc_cdmatag, 261 (void **)&sc->sc_control_data, 262 BUS_DMA_WAITOK | BUS_DMA_COHERENT | BUS_DMA_ZERO, 263 &sc->sc_cddmamap)) != 0) { 264 device_printf(sc->sc_dev, 265 "unable to allocate control data, error = %d\n", error); 266 goto fail_ctag; 267 } 268 269 sc->sc_cddma = 0; 270 if ((error = bus_dmamap_load(sc->sc_cdmatag, sc->sc_cddmamap, 271 sc->sc_control_data, sizeof(struct cas_control_data), 272 cas_cddma_callback, sc, 0)) != 0 || sc->sc_cddma == 0) { 273 device_printf(sc->sc_dev, 274 "unable to load control data DMA map, error = %d\n", 275 error); 276 goto fail_cmem; 277 } 278 279 /* 280 * Initialize the transmit job descriptors. 281 */ 282 STAILQ_INIT(&sc->sc_txfreeq); 283 STAILQ_INIT(&sc->sc_txdirtyq); 284 285 /* 286 * Create the transmit buffer DMA maps. 287 */ 288 error = ENOMEM; 289 for (i = 0; i < CAS_TXQUEUELEN; i++) { 290 txs = &sc->sc_txsoft[i]; 291 txs->txs_mbuf = NULL; 292 txs->txs_ndescs = 0; 293 if ((error = bus_dmamap_create(sc->sc_tdmatag, 0, 294 &txs->txs_dmamap)) != 0) { 295 device_printf(sc->sc_dev, 296 "unable to create TX DMA map %d, error = %d\n", 297 i, error); 298 goto fail_txd; 299 } 300 STAILQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 301 } 302 303 /* 304 * Allocate the receive buffers, create and load the DMA maps 305 * for them. 306 */ 307 for (i = 0; i < CAS_NRXDESC; i++) { 308 if ((error = bus_dmamem_alloc(sc->sc_rdmatag, 309 &sc->sc_rxdsoft[i].rxds_buf, BUS_DMA_WAITOK, 310 &sc->sc_rxdsoft[i].rxds_dmamap)) != 0) { 311 device_printf(sc->sc_dev, 312 "unable to allocate RX buffer %d, error = %d\n", 313 i, error); 314 goto fail_rxmem; 315 } 316 317 sc->sc_rxdptr = i; 318 sc->sc_rxdsoft[i].rxds_paddr = 0; 319 if ((error = bus_dmamap_load(sc->sc_rdmatag, 320 sc->sc_rxdsoft[i].rxds_dmamap, sc->sc_rxdsoft[i].rxds_buf, 321 CAS_PAGE_SIZE, cas_rxdma_callback, sc, 0)) != 0 || 322 sc->sc_rxdsoft[i].rxds_paddr == 0) { 323 device_printf(sc->sc_dev, 324 "unable to load RX DMA map %d, error = %d\n", 325 i, error); 326 goto fail_rxmap; 327 } 328 } 329 330 if ((sc->sc_flags & CAS_SERDES) == 0) { 331 CAS_WRITE_4(sc, CAS_PCS_DATAPATH, CAS_PCS_DATAPATH_MII); 332 CAS_BARRIER(sc, CAS_PCS_DATAPATH, 4, 333 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 334 cas_mifinit(sc); 335 /* 336 * Look for an external PHY. 337 */ 338 error = ENXIO; 339 v = CAS_READ_4(sc, CAS_MIF_CONF); 340 if ((v & CAS_MIF_CONF_MDI1) != 0) { 341 v |= CAS_MIF_CONF_PHY_SELECT; 342 CAS_WRITE_4(sc, CAS_MIF_CONF, v); 343 CAS_BARRIER(sc, CAS_MIF_CONF, 4, 344 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 345 /* Enable/unfreeze the GMII pins of Saturn. */ 346 if (sc->sc_variant == CAS_SATURN) { 347 CAS_WRITE_4(sc, CAS_SATURN_PCFG, 348 CAS_READ_4(sc, CAS_SATURN_PCFG) & 349 ~CAS_SATURN_PCFG_FSI); 350 CAS_BARRIER(sc, CAS_SATURN_PCFG, 4, 351 BUS_SPACE_BARRIER_READ | 352 BUS_SPACE_BARRIER_WRITE); 353 DELAY(10000); 354 } 355 error = mii_attach(sc->sc_dev, &sc->sc_miibus, ifp, 356 cas_mediachange, cas_mediastatus, BMSR_DEFCAPMASK, 357 MII_PHY_ANY, MII_OFFSET_ANY, MIIF_DOPAUSE); 358 } 359 /* 360 * Fall back on an internal PHY if no external PHY was found. 361 */ 362 if (error != 0 && (v & CAS_MIF_CONF_MDI0) != 0) { 363 v &= ~CAS_MIF_CONF_PHY_SELECT; 364 CAS_WRITE_4(sc, CAS_MIF_CONF, v); 365 CAS_BARRIER(sc, CAS_MIF_CONF, 4, 366 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 367 /* Freeze the GMII pins of Saturn for saving power. */ 368 if (sc->sc_variant == CAS_SATURN) { 369 CAS_WRITE_4(sc, CAS_SATURN_PCFG, 370 CAS_READ_4(sc, CAS_SATURN_PCFG) | 371 CAS_SATURN_PCFG_FSI); 372 CAS_BARRIER(sc, CAS_SATURN_PCFG, 4, 373 BUS_SPACE_BARRIER_READ | 374 BUS_SPACE_BARRIER_WRITE); 375 DELAY(10000); 376 } 377 error = mii_attach(sc->sc_dev, &sc->sc_miibus, ifp, 378 cas_mediachange, cas_mediastatus, BMSR_DEFCAPMASK, 379 MII_PHY_ANY, MII_OFFSET_ANY, MIIF_DOPAUSE); 380 } 381 } else { 382 /* 383 * Use the external PCS SERDES. 384 */ 385 CAS_WRITE_4(sc, CAS_PCS_DATAPATH, CAS_PCS_DATAPATH_SERDES); 386 CAS_BARRIER(sc, CAS_PCS_DATAPATH, 4, BUS_SPACE_BARRIER_WRITE); 387 /* Enable/unfreeze the SERDES pins of Saturn. */ 388 if (sc->sc_variant == CAS_SATURN) { 389 CAS_WRITE_4(sc, CAS_SATURN_PCFG, 0); 390 CAS_BARRIER(sc, CAS_SATURN_PCFG, 4, 391 BUS_SPACE_BARRIER_WRITE); 392 } 393 CAS_WRITE_4(sc, CAS_PCS_SERDES_CTRL, CAS_PCS_SERDES_CTRL_ESD); 394 CAS_BARRIER(sc, CAS_PCS_SERDES_CTRL, 4, 395 BUS_SPACE_BARRIER_WRITE); 396 CAS_WRITE_4(sc, CAS_PCS_CONF, CAS_PCS_CONF_EN); 397 CAS_BARRIER(sc, CAS_PCS_CONF, 4, 398 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 399 error = mii_attach(sc->sc_dev, &sc->sc_miibus, ifp, 400 cas_mediachange, cas_mediastatus, BMSR_DEFCAPMASK, 401 CAS_PHYAD_EXTERNAL, MII_OFFSET_ANY, MIIF_DOPAUSE); 402 } 403 if (error != 0) { 404 device_printf(sc->sc_dev, "attaching PHYs failed\n"); 405 goto fail_rxmap; 406 } 407 sc->sc_mii = device_get_softc(sc->sc_miibus); 408 409 /* 410 * From this point forward, the attachment cannot fail. A failure 411 * before this point releases all resources that may have been 412 * allocated. 413 */ 414 415 /* Announce FIFO sizes. */ 416 v = CAS_READ_4(sc, CAS_TX_FIFO_SIZE); 417 device_printf(sc->sc_dev, "%ukB RX FIFO, %ukB TX FIFO\n", 418 CAS_RX_FIFO_SIZE / 1024, v / 16); 419 420 /* Attach the interface. */ 421 ether_ifattach(ifp, sc->sc_enaddr); 422 423 /* 424 * Tell the upper layer(s) we support long frames/checksum offloads. 425 */ 426 ifp->if_hdrlen = sizeof(struct ether_vlan_header); 427 ifp->if_capabilities = IFCAP_VLAN_MTU; 428 if ((sc->sc_flags & CAS_NO_CSUM) == 0) { 429 ifp->if_capabilities |= IFCAP_HWCSUM; 430 ifp->if_hwassist = CAS_CSUM_FEATURES; 431 } 432 ifp->if_capenable = ifp->if_capabilities; 433 434 return (0); 435 436 /* 437 * Free any resources we've allocated during the failed attach 438 * attempt. Do this in reverse order and fall through. 439 */ 440 fail_rxmap: 441 for (i = 0; i < CAS_NRXDESC; i++) 442 if (sc->sc_rxdsoft[i].rxds_paddr != 0) 443 bus_dmamap_unload(sc->sc_rdmatag, 444 sc->sc_rxdsoft[i].rxds_dmamap); 445 fail_rxmem: 446 for (i = 0; i < CAS_NRXDESC; i++) 447 if (sc->sc_rxdsoft[i].rxds_buf != NULL) 448 bus_dmamem_free(sc->sc_rdmatag, 449 sc->sc_rxdsoft[i].rxds_buf, 450 sc->sc_rxdsoft[i].rxds_dmamap); 451 fail_txd: 452 for (i = 0; i < CAS_TXQUEUELEN; i++) 453 if (sc->sc_txsoft[i].txs_dmamap != NULL) 454 bus_dmamap_destroy(sc->sc_tdmatag, 455 sc->sc_txsoft[i].txs_dmamap); 456 bus_dmamap_unload(sc->sc_cdmatag, sc->sc_cddmamap); 457 fail_cmem: 458 bus_dmamem_free(sc->sc_cdmatag, sc->sc_control_data, 459 sc->sc_cddmamap); 460 fail_ctag: 461 bus_dma_tag_destroy(sc->sc_cdmatag); 462 fail_ttag: 463 bus_dma_tag_destroy(sc->sc_tdmatag); 464 fail_rtag: 465 bus_dma_tag_destroy(sc->sc_rdmatag); 466 fail_ptag: 467 bus_dma_tag_destroy(sc->sc_pdmatag); 468 fail_taskq: 469 taskqueue_free(sc->sc_tq); 470 fail_ifnet: 471 if_free(ifp); 472 return (error); 473 } 474 475 static void 476 cas_detach(struct cas_softc *sc) 477 { 478 struct ifnet *ifp = sc->sc_ifp; 479 int i; 480 481 ether_ifdetach(ifp); 482 CAS_LOCK(sc); 483 cas_stop(ifp); 484 CAS_UNLOCK(sc); 485 callout_drain(&sc->sc_tick_ch); 486 callout_drain(&sc->sc_rx_ch); 487 taskqueue_drain(sc->sc_tq, &sc->sc_intr_task); 488 taskqueue_drain(sc->sc_tq, &sc->sc_tx_task); 489 if_free(ifp); 490 taskqueue_free(sc->sc_tq); 491 device_delete_child(sc->sc_dev, sc->sc_miibus); 492 493 for (i = 0; i < CAS_NRXDESC; i++) 494 if (sc->sc_rxdsoft[i].rxds_dmamap != NULL) 495 bus_dmamap_sync(sc->sc_rdmatag, 496 sc->sc_rxdsoft[i].rxds_dmamap, 497 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 498 for (i = 0; i < CAS_NRXDESC; i++) 499 if (sc->sc_rxdsoft[i].rxds_paddr != 0) 500 bus_dmamap_unload(sc->sc_rdmatag, 501 sc->sc_rxdsoft[i].rxds_dmamap); 502 for (i = 0; i < CAS_NRXDESC; i++) 503 if (sc->sc_rxdsoft[i].rxds_buf != NULL) 504 bus_dmamem_free(sc->sc_rdmatag, 505 sc->sc_rxdsoft[i].rxds_buf, 506 sc->sc_rxdsoft[i].rxds_dmamap); 507 for (i = 0; i < CAS_TXQUEUELEN; i++) 508 if (sc->sc_txsoft[i].txs_dmamap != NULL) 509 bus_dmamap_destroy(sc->sc_tdmatag, 510 sc->sc_txsoft[i].txs_dmamap); 511 CAS_CDSYNC(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 512 bus_dmamap_unload(sc->sc_cdmatag, sc->sc_cddmamap); 513 bus_dmamem_free(sc->sc_cdmatag, sc->sc_control_data, 514 sc->sc_cddmamap); 515 bus_dma_tag_destroy(sc->sc_cdmatag); 516 bus_dma_tag_destroy(sc->sc_tdmatag); 517 bus_dma_tag_destroy(sc->sc_rdmatag); 518 bus_dma_tag_destroy(sc->sc_pdmatag); 519 } 520 521 static void 522 cas_suspend(struct cas_softc *sc) 523 { 524 struct ifnet *ifp = sc->sc_ifp; 525 526 CAS_LOCK(sc); 527 cas_stop(ifp); 528 CAS_UNLOCK(sc); 529 } 530 531 static void 532 cas_resume(struct cas_softc *sc) 533 { 534 struct ifnet *ifp = sc->sc_ifp; 535 536 CAS_LOCK(sc); 537 /* 538 * On resume all registers have to be initialized again like 539 * after power-on. 540 */ 541 sc->sc_flags &= ~CAS_INITED; 542 if (ifp->if_flags & IFF_UP) 543 cas_init_locked(sc); 544 CAS_UNLOCK(sc); 545 } 546 547 static inline void 548 cas_rxcksum(struct mbuf *m, uint16_t cksum) 549 { 550 struct ether_header *eh; 551 struct ip *ip; 552 struct udphdr *uh; 553 uint16_t *opts; 554 int32_t hlen, len, pktlen; 555 uint32_t temp32; 556 557 pktlen = m->m_pkthdr.len; 558 if (pktlen < sizeof(struct ether_header) + sizeof(struct ip)) 559 return; 560 eh = mtod(m, struct ether_header *); 561 if (eh->ether_type != htons(ETHERTYPE_IP)) 562 return; 563 ip = (struct ip *)(eh + 1); 564 if (ip->ip_v != IPVERSION) 565 return; 566 567 hlen = ip->ip_hl << 2; 568 pktlen -= sizeof(struct ether_header); 569 if (hlen < sizeof(struct ip)) 570 return; 571 if (ntohs(ip->ip_len) < hlen) 572 return; 573 if (ntohs(ip->ip_len) != pktlen) 574 return; 575 if (ip->ip_off & htons(IP_MF | IP_OFFMASK)) 576 return; /* Cannot handle fragmented packet. */ 577 578 switch (ip->ip_p) { 579 case IPPROTO_TCP: 580 if (pktlen < (hlen + sizeof(struct tcphdr))) 581 return; 582 break; 583 case IPPROTO_UDP: 584 if (pktlen < (hlen + sizeof(struct udphdr))) 585 return; 586 uh = (struct udphdr *)((uint8_t *)ip + hlen); 587 if (uh->uh_sum == 0) 588 return; /* no checksum */ 589 break; 590 default: 591 return; 592 } 593 594 cksum = ~cksum; 595 /* checksum fixup for IP options */ 596 len = hlen - sizeof(struct ip); 597 if (len > 0) { 598 opts = (uint16_t *)(ip + 1); 599 for (; len > 0; len -= sizeof(uint16_t), opts++) { 600 temp32 = cksum - *opts; 601 temp32 = (temp32 >> 16) + (temp32 & 65535); 602 cksum = temp32 & 65535; 603 } 604 } 605 m->m_pkthdr.csum_flags |= CSUM_DATA_VALID; 606 m->m_pkthdr.csum_data = cksum; 607 } 608 609 static void 610 cas_cddma_callback(void *xsc, bus_dma_segment_t *segs, int nsegs, int error) 611 { 612 struct cas_softc *sc = xsc; 613 614 if (error != 0) 615 return; 616 if (nsegs != 1) 617 panic("%s: bad control buffer segment count", __func__); 618 sc->sc_cddma = segs[0].ds_addr; 619 } 620 621 static void 622 cas_rxdma_callback(void *xsc, bus_dma_segment_t *segs, int nsegs, int error) 623 { 624 struct cas_softc *sc = xsc; 625 626 if (error != 0) 627 return; 628 if (nsegs != 1) 629 panic("%s: bad RX buffer segment count", __func__); 630 sc->sc_rxdsoft[sc->sc_rxdptr].rxds_paddr = segs[0].ds_addr; 631 } 632 633 static void 634 cas_tick(void *arg) 635 { 636 struct cas_softc *sc = arg; 637 struct ifnet *ifp = sc->sc_ifp; 638 uint32_t v; 639 640 CAS_LOCK_ASSERT(sc, MA_OWNED); 641 642 /* 643 * Unload collision and error counters. 644 */ 645 if_inc_counter(ifp, IFCOUNTER_COLLISIONS, 646 CAS_READ_4(sc, CAS_MAC_NORM_COLL_CNT) + 647 CAS_READ_4(sc, CAS_MAC_FIRST_COLL_CNT)); 648 v = CAS_READ_4(sc, CAS_MAC_EXCESS_COLL_CNT) + 649 CAS_READ_4(sc, CAS_MAC_LATE_COLL_CNT); 650 if_inc_counter(ifp, IFCOUNTER_COLLISIONS, v); 651 if_inc_counter(ifp, IFCOUNTER_OERRORS, v); 652 if_inc_counter(ifp, IFCOUNTER_IERRORS, 653 CAS_READ_4(sc, CAS_MAC_RX_LEN_ERR_CNT) + 654 CAS_READ_4(sc, CAS_MAC_RX_ALIGN_ERR) + 655 CAS_READ_4(sc, CAS_MAC_RX_CRC_ERR_CNT) + 656 CAS_READ_4(sc, CAS_MAC_RX_CODE_VIOL)); 657 658 /* 659 * Then clear the hardware counters. 660 */ 661 CAS_WRITE_4(sc, CAS_MAC_NORM_COLL_CNT, 0); 662 CAS_WRITE_4(sc, CAS_MAC_FIRST_COLL_CNT, 0); 663 CAS_WRITE_4(sc, CAS_MAC_EXCESS_COLL_CNT, 0); 664 CAS_WRITE_4(sc, CAS_MAC_LATE_COLL_CNT, 0); 665 CAS_WRITE_4(sc, CAS_MAC_RX_LEN_ERR_CNT, 0); 666 CAS_WRITE_4(sc, CAS_MAC_RX_ALIGN_ERR, 0); 667 CAS_WRITE_4(sc, CAS_MAC_RX_CRC_ERR_CNT, 0); 668 CAS_WRITE_4(sc, CAS_MAC_RX_CODE_VIOL, 0); 669 670 mii_tick(sc->sc_mii); 671 672 if (sc->sc_txfree != CAS_MAXTXFREE) 673 cas_tint(sc); 674 675 cas_watchdog(sc); 676 677 callout_reset(&sc->sc_tick_ch, hz, cas_tick, sc); 678 } 679 680 static int 681 cas_bitwait(struct cas_softc *sc, bus_addr_t r, uint32_t clr, uint32_t set) 682 { 683 int i; 684 uint32_t reg; 685 686 for (i = CAS_TRIES; i--; DELAY(100)) { 687 reg = CAS_READ_4(sc, r); 688 if ((reg & clr) == 0 && (reg & set) == set) 689 return (1); 690 } 691 return (0); 692 } 693 694 static void 695 cas_reset(struct cas_softc *sc) 696 { 697 698 #ifdef CAS_DEBUG 699 CTR2(KTR_CAS, "%s: %s", device_get_name(sc->sc_dev), __func__); 700 #endif 701 /* Disable all interrupts in order to avoid spurious ones. */ 702 CAS_WRITE_4(sc, CAS_INTMASK, 0xffffffff); 703 704 cas_reset_rx(sc); 705 cas_reset_tx(sc); 706 707 /* 708 * Do a full reset modulo the result of the last auto-negotiation 709 * when using the SERDES. 710 */ 711 CAS_WRITE_4(sc, CAS_RESET, CAS_RESET_RX | CAS_RESET_TX | 712 ((sc->sc_flags & CAS_SERDES) != 0 ? CAS_RESET_PCS_DIS : 0)); 713 CAS_BARRIER(sc, CAS_RESET, 4, 714 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 715 DELAY(3000); 716 if (!cas_bitwait(sc, CAS_RESET, CAS_RESET_RX | CAS_RESET_TX, 0)) 717 device_printf(sc->sc_dev, "cannot reset device\n"); 718 } 719 720 static void 721 cas_stop(struct ifnet *ifp) 722 { 723 struct cas_softc *sc = ifp->if_softc; 724 struct cas_txsoft *txs; 725 726 #ifdef CAS_DEBUG 727 CTR2(KTR_CAS, "%s: %s", device_get_name(sc->sc_dev), __func__); 728 #endif 729 730 callout_stop(&sc->sc_tick_ch); 731 callout_stop(&sc->sc_rx_ch); 732 733 /* Disable all interrupts in order to avoid spurious ones. */ 734 CAS_WRITE_4(sc, CAS_INTMASK, 0xffffffff); 735 736 cas_reset_tx(sc); 737 cas_reset_rx(sc); 738 739 /* 740 * Release any queued transmit buffers. 741 */ 742 while ((txs = STAILQ_FIRST(&sc->sc_txdirtyq)) != NULL) { 743 STAILQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q); 744 if (txs->txs_ndescs != 0) { 745 bus_dmamap_sync(sc->sc_tdmatag, txs->txs_dmamap, 746 BUS_DMASYNC_POSTWRITE); 747 bus_dmamap_unload(sc->sc_tdmatag, txs->txs_dmamap); 748 if (txs->txs_mbuf != NULL) { 749 m_freem(txs->txs_mbuf); 750 txs->txs_mbuf = NULL; 751 } 752 } 753 STAILQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 754 } 755 756 /* 757 * Mark the interface down and cancel the watchdog timer. 758 */ 759 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 760 sc->sc_flags &= ~CAS_LINK; 761 sc->sc_wdog_timer = 0; 762 } 763 764 static int 765 cas_reset_rx(struct cas_softc *sc) 766 { 767 768 /* 769 * Resetting while DMA is in progress can cause a bus hang, so we 770 * disable DMA first. 771 */ 772 (void)cas_disable_rx(sc); 773 CAS_WRITE_4(sc, CAS_RX_CONF, 0); 774 CAS_BARRIER(sc, CAS_RX_CONF, 4, 775 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 776 if (!cas_bitwait(sc, CAS_RX_CONF, CAS_RX_CONF_RXDMA_EN, 0)) 777 device_printf(sc->sc_dev, "cannot disable RX DMA\n"); 778 779 /* Finally, reset the ERX. */ 780 CAS_WRITE_4(sc, CAS_RESET, CAS_RESET_RX | 781 ((sc->sc_flags & CAS_SERDES) != 0 ? CAS_RESET_PCS_DIS : 0)); 782 CAS_BARRIER(sc, CAS_RESET, 4, 783 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 784 if (!cas_bitwait(sc, CAS_RESET, CAS_RESET_RX, 0)) { 785 device_printf(sc->sc_dev, "cannot reset receiver\n"); 786 return (1); 787 } 788 return (0); 789 } 790 791 static int 792 cas_reset_tx(struct cas_softc *sc) 793 { 794 795 /* 796 * Resetting while DMA is in progress can cause a bus hang, so we 797 * disable DMA first. 798 */ 799 (void)cas_disable_tx(sc); 800 CAS_WRITE_4(sc, CAS_TX_CONF, 0); 801 CAS_BARRIER(sc, CAS_TX_CONF, 4, 802 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 803 if (!cas_bitwait(sc, CAS_TX_CONF, CAS_TX_CONF_TXDMA_EN, 0)) 804 device_printf(sc->sc_dev, "cannot disable TX DMA\n"); 805 806 /* Finally, reset the ETX. */ 807 CAS_WRITE_4(sc, CAS_RESET, CAS_RESET_TX | 808 ((sc->sc_flags & CAS_SERDES) != 0 ? CAS_RESET_PCS_DIS : 0)); 809 CAS_BARRIER(sc, CAS_RESET, 4, 810 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 811 if (!cas_bitwait(sc, CAS_RESET, CAS_RESET_TX, 0)) { 812 device_printf(sc->sc_dev, "cannot reset transmitter\n"); 813 return (1); 814 } 815 return (0); 816 } 817 818 static int 819 cas_disable_rx(struct cas_softc *sc) 820 { 821 822 CAS_WRITE_4(sc, CAS_MAC_RX_CONF, 823 CAS_READ_4(sc, CAS_MAC_RX_CONF) & ~CAS_MAC_RX_CONF_EN); 824 CAS_BARRIER(sc, CAS_MAC_RX_CONF, 4, 825 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 826 if (cas_bitwait(sc, CAS_MAC_RX_CONF, CAS_MAC_RX_CONF_EN, 0)) 827 return (1); 828 if (bootverbose) 829 device_printf(sc->sc_dev, "cannot disable RX MAC\n"); 830 return (0); 831 } 832 833 static int 834 cas_disable_tx(struct cas_softc *sc) 835 { 836 837 CAS_WRITE_4(sc, CAS_MAC_TX_CONF, 838 CAS_READ_4(sc, CAS_MAC_TX_CONF) & ~CAS_MAC_TX_CONF_EN); 839 CAS_BARRIER(sc, CAS_MAC_TX_CONF, 4, 840 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 841 if (cas_bitwait(sc, CAS_MAC_TX_CONF, CAS_MAC_TX_CONF_EN, 0)) 842 return (1); 843 if (bootverbose) 844 device_printf(sc->sc_dev, "cannot disable TX MAC\n"); 845 return (0); 846 } 847 848 static inline void 849 cas_rxcompinit(struct cas_rx_comp *rxcomp) 850 { 851 852 rxcomp->crc_word1 = 0; 853 rxcomp->crc_word2 = 0; 854 rxcomp->crc_word3 = 855 htole64(CAS_SET(ETHER_HDR_LEN + sizeof(struct ip), CAS_RC3_CSO)); 856 rxcomp->crc_word4 = htole64(CAS_RC4_ZERO); 857 } 858 859 static void 860 cas_meminit(struct cas_softc *sc) 861 { 862 int i; 863 864 CAS_LOCK_ASSERT(sc, MA_OWNED); 865 866 /* 867 * Initialize the transmit descriptor ring. 868 */ 869 for (i = 0; i < CAS_NTXDESC; i++) { 870 sc->sc_txdescs[i].cd_flags = 0; 871 sc->sc_txdescs[i].cd_buf_ptr = 0; 872 } 873 sc->sc_txfree = CAS_MAXTXFREE; 874 sc->sc_txnext = 0; 875 sc->sc_txwin = 0; 876 877 /* 878 * Initialize the receive completion ring. 879 */ 880 for (i = 0; i < CAS_NRXCOMP; i++) 881 cas_rxcompinit(&sc->sc_rxcomps[i]); 882 sc->sc_rxcptr = 0; 883 884 /* 885 * Initialize the first receive descriptor ring. We leave 886 * the second one zeroed as we don't actually use it. 887 */ 888 for (i = 0; i < CAS_NRXDESC; i++) 889 CAS_INIT_RXDESC(sc, i, i); 890 sc->sc_rxdptr = 0; 891 892 CAS_CDSYNC(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 893 } 894 895 static u_int 896 cas_descsize(u_int sz) 897 { 898 899 switch (sz) { 900 case 32: 901 return (CAS_DESC_32); 902 case 64: 903 return (CAS_DESC_64); 904 case 128: 905 return (CAS_DESC_128); 906 case 256: 907 return (CAS_DESC_256); 908 case 512: 909 return (CAS_DESC_512); 910 case 1024: 911 return (CAS_DESC_1K); 912 case 2048: 913 return (CAS_DESC_2K); 914 case 4096: 915 return (CAS_DESC_4K); 916 case 8192: 917 return (CAS_DESC_8K); 918 default: 919 printf("%s: invalid descriptor ring size %d\n", __func__, sz); 920 return (CAS_DESC_32); 921 } 922 } 923 924 static u_int 925 cas_rxcompsize(u_int sz) 926 { 927 928 switch (sz) { 929 case 128: 930 return (CAS_RX_CONF_COMP_128); 931 case 256: 932 return (CAS_RX_CONF_COMP_256); 933 case 512: 934 return (CAS_RX_CONF_COMP_512); 935 case 1024: 936 return (CAS_RX_CONF_COMP_1K); 937 case 2048: 938 return (CAS_RX_CONF_COMP_2K); 939 case 4096: 940 return (CAS_RX_CONF_COMP_4K); 941 case 8192: 942 return (CAS_RX_CONF_COMP_8K); 943 case 16384: 944 return (CAS_RX_CONF_COMP_16K); 945 case 32768: 946 return (CAS_RX_CONF_COMP_32K); 947 default: 948 printf("%s: invalid dcompletion ring size %d\n", __func__, sz); 949 return (CAS_RX_CONF_COMP_128); 950 } 951 } 952 953 static void 954 cas_init(void *xsc) 955 { 956 struct cas_softc *sc = xsc; 957 958 CAS_LOCK(sc); 959 cas_init_locked(sc); 960 CAS_UNLOCK(sc); 961 } 962 963 /* 964 * Initialization of interface; set up initialization block 965 * and transmit/receive descriptor rings. 966 */ 967 static void 968 cas_init_locked(struct cas_softc *sc) 969 { 970 struct ifnet *ifp = sc->sc_ifp; 971 uint32_t v; 972 973 CAS_LOCK_ASSERT(sc, MA_OWNED); 974 975 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) 976 return; 977 978 #ifdef CAS_DEBUG 979 CTR2(KTR_CAS, "%s: %s: calling stop", device_get_name(sc->sc_dev), 980 __func__); 981 #endif 982 /* 983 * Initialization sequence. The numbered steps below correspond 984 * to the sequence outlined in section 6.3.5.1 in the Ethernet 985 * Channel Engine manual (part of the PCIO manual). 986 * See also the STP2002-STQ document from Sun Microsystems. 987 */ 988 989 /* step 1 & 2. Reset the Ethernet Channel. */ 990 cas_stop(ifp); 991 cas_reset(sc); 992 #ifdef CAS_DEBUG 993 CTR2(KTR_CAS, "%s: %s: restarting", device_get_name(sc->sc_dev), 994 __func__); 995 #endif 996 997 if ((sc->sc_flags & CAS_SERDES) == 0) 998 /* Re-initialize the MIF. */ 999 cas_mifinit(sc); 1000 1001 /* step 3. Setup data structures in host memory. */ 1002 cas_meminit(sc); 1003 1004 /* step 4. TX MAC registers & counters */ 1005 cas_init_regs(sc); 1006 1007 /* step 5. RX MAC registers & counters */ 1008 1009 /* step 6 & 7. Program Ring Base Addresses. */ 1010 CAS_WRITE_4(sc, CAS_TX_DESC3_BASE_HI, 1011 (((uint64_t)CAS_CDTXDADDR(sc, 0)) >> 32)); 1012 CAS_WRITE_4(sc, CAS_TX_DESC3_BASE_LO, 1013 CAS_CDTXDADDR(sc, 0) & 0xffffffff); 1014 1015 CAS_WRITE_4(sc, CAS_RX_COMP_BASE_HI, 1016 (((uint64_t)CAS_CDRXCADDR(sc, 0)) >> 32)); 1017 CAS_WRITE_4(sc, CAS_RX_COMP_BASE_LO, 1018 CAS_CDRXCADDR(sc, 0) & 0xffffffff); 1019 1020 CAS_WRITE_4(sc, CAS_RX_DESC_BASE_HI, 1021 (((uint64_t)CAS_CDRXDADDR(sc, 0)) >> 32)); 1022 CAS_WRITE_4(sc, CAS_RX_DESC_BASE_LO, 1023 CAS_CDRXDADDR(sc, 0) & 0xffffffff); 1024 1025 if ((sc->sc_flags & CAS_REG_PLUS) != 0) { 1026 CAS_WRITE_4(sc, CAS_RX_DESC2_BASE_HI, 1027 (((uint64_t)CAS_CDRXD2ADDR(sc, 0)) >> 32)); 1028 CAS_WRITE_4(sc, CAS_RX_DESC2_BASE_LO, 1029 CAS_CDRXD2ADDR(sc, 0) & 0xffffffff); 1030 } 1031 1032 #ifdef CAS_DEBUG 1033 CTR5(KTR_CAS, 1034 "loading TXDR %lx, RXCR %lx, RXDR %lx, RXD2R %lx, cddma %lx", 1035 CAS_CDTXDADDR(sc, 0), CAS_CDRXCADDR(sc, 0), CAS_CDRXDADDR(sc, 0), 1036 CAS_CDRXD2ADDR(sc, 0), sc->sc_cddma); 1037 #endif 1038 1039 /* step 8. Global Configuration & Interrupt Masks */ 1040 1041 /* Disable weighted round robin. */ 1042 CAS_WRITE_4(sc, CAS_CAW, CAS_CAW_RR_DIS); 1043 1044 /* 1045 * Enable infinite bursts for revisions without PCI issues if 1046 * applicable. Doing so greatly improves the TX performance. 1047 */ 1048 CAS_WRITE_4(sc, CAS_INF_BURST, 1049 (sc->sc_flags & CAS_TABORT) == 0 ? CAS_INF_BURST_EN : 1050 0); 1051 1052 /* Set up interrupts. */ 1053 CAS_WRITE_4(sc, CAS_INTMASK, 1054 ~(CAS_INTR_TX_INT_ME | CAS_INTR_TX_TAG_ERR | 1055 CAS_INTR_RX_DONE | CAS_INTR_RX_BUF_NA | CAS_INTR_RX_TAG_ERR | 1056 CAS_INTR_RX_COMP_FULL | CAS_INTR_RX_BUF_AEMPTY | 1057 CAS_INTR_RX_COMP_AFULL | CAS_INTR_RX_LEN_MMATCH | 1058 CAS_INTR_PCI_ERROR_INT 1059 #ifdef CAS_DEBUG 1060 | CAS_INTR_PCS_INT | CAS_INTR_MIF 1061 #endif 1062 )); 1063 /* Don't clear top level interrupts when CAS_STATUS_ALIAS is read. */ 1064 CAS_WRITE_4(sc, CAS_CLEAR_ALIAS, 0); 1065 CAS_WRITE_4(sc, CAS_MAC_RX_MASK, ~CAS_MAC_RX_OVERFLOW); 1066 CAS_WRITE_4(sc, CAS_MAC_TX_MASK, 1067 ~(CAS_MAC_TX_UNDERRUN | CAS_MAC_TX_MAX_PKT_ERR)); 1068 #ifdef CAS_DEBUG 1069 CAS_WRITE_4(sc, CAS_MAC_CTRL_MASK, 1070 ~(CAS_MAC_CTRL_PAUSE_RCVD | CAS_MAC_CTRL_PAUSE | 1071 CAS_MAC_CTRL_NON_PAUSE)); 1072 #else 1073 CAS_WRITE_4(sc, CAS_MAC_CTRL_MASK, 1074 CAS_MAC_CTRL_PAUSE_RCVD | CAS_MAC_CTRL_PAUSE | 1075 CAS_MAC_CTRL_NON_PAUSE); 1076 #endif 1077 1078 /* Enable PCI error interrupts. */ 1079 CAS_WRITE_4(sc, CAS_ERROR_MASK, 1080 ~(CAS_ERROR_DTRTO | CAS_ERROR_OTHER | CAS_ERROR_DMAW_ZERO | 1081 CAS_ERROR_DMAR_ZERO | CAS_ERROR_RTRTO)); 1082 1083 /* Enable PCI error interrupts in BIM configuration. */ 1084 CAS_WRITE_4(sc, CAS_BIM_CONF, 1085 CAS_BIM_CONF_DPAR_EN | CAS_BIM_CONF_RMA_EN | CAS_BIM_CONF_RTA_EN); 1086 1087 /* 1088 * step 9. ETX Configuration: encode receive descriptor ring size, 1089 * enable DMA and disable pre-interrupt writeback completion. 1090 */ 1091 v = cas_descsize(CAS_NTXDESC) << CAS_TX_CONF_DESC3_SHFT; 1092 CAS_WRITE_4(sc, CAS_TX_CONF, v | CAS_TX_CONF_TXDMA_EN | 1093 CAS_TX_CONF_RDPP_DIS | CAS_TX_CONF_PICWB_DIS); 1094 1095 /* step 10. ERX Configuration */ 1096 1097 /* 1098 * Encode receive completion and descriptor ring sizes, set the 1099 * swivel offset. 1100 */ 1101 v = cas_rxcompsize(CAS_NRXCOMP) << CAS_RX_CONF_COMP_SHFT; 1102 v |= cas_descsize(CAS_NRXDESC) << CAS_RX_CONF_DESC_SHFT; 1103 if ((sc->sc_flags & CAS_REG_PLUS) != 0) 1104 v |= cas_descsize(CAS_NRXDESC2) << CAS_RX_CONF_DESC2_SHFT; 1105 CAS_WRITE_4(sc, CAS_RX_CONF, 1106 v | (ETHER_ALIGN << CAS_RX_CONF_SOFF_SHFT)); 1107 1108 /* Set the PAUSE thresholds. We use the maximum OFF threshold. */ 1109 CAS_WRITE_4(sc, CAS_RX_PTHRS, 1110 (111 << CAS_RX_PTHRS_XOFF_SHFT) | (15 << CAS_RX_PTHRS_XON_SHFT)); 1111 1112 /* RX blanking */ 1113 CAS_WRITE_4(sc, CAS_RX_BLANK, 1114 (15 << CAS_RX_BLANK_TIME_SHFT) | (5 << CAS_RX_BLANK_PKTS_SHFT)); 1115 1116 /* Set RX_COMP_AFULL threshold to half of the RX completions. */ 1117 CAS_WRITE_4(sc, CAS_RX_AEMPTY_THRS, 1118 (CAS_NRXCOMP / 2) << CAS_RX_AEMPTY_COMP_SHFT); 1119 1120 /* Initialize the RX page size register as appropriate for 8k. */ 1121 CAS_WRITE_4(sc, CAS_RX_PSZ, 1122 (CAS_RX_PSZ_8K << CAS_RX_PSZ_SHFT) | 1123 (4 << CAS_RX_PSZ_MB_CNT_SHFT) | 1124 (CAS_RX_PSZ_MB_STRD_2K << CAS_RX_PSZ_MB_STRD_SHFT) | 1125 (CAS_RX_PSZ_MB_OFF_64 << CAS_RX_PSZ_MB_OFF_SHFT)); 1126 1127 /* Disable RX random early detection. */ 1128 CAS_WRITE_4(sc, CAS_RX_RED, 0); 1129 1130 /* Zero the RX reassembly DMA table. */ 1131 for (v = 0; v <= CAS_RX_REAS_DMA_ADDR_LC; v++) { 1132 CAS_WRITE_4(sc, CAS_RX_REAS_DMA_ADDR, v); 1133 CAS_WRITE_4(sc, CAS_RX_REAS_DMA_DATA_LO, 0); 1134 CAS_WRITE_4(sc, CAS_RX_REAS_DMA_DATA_MD, 0); 1135 CAS_WRITE_4(sc, CAS_RX_REAS_DMA_DATA_HI, 0); 1136 } 1137 1138 /* Ensure the RX control FIFO and RX IPP FIFO addresses are zero. */ 1139 CAS_WRITE_4(sc, CAS_RX_CTRL_FIFO, 0); 1140 CAS_WRITE_4(sc, CAS_RX_IPP_ADDR, 0); 1141 1142 /* Finally, enable RX DMA. */ 1143 CAS_WRITE_4(sc, CAS_RX_CONF, 1144 CAS_READ_4(sc, CAS_RX_CONF) | CAS_RX_CONF_RXDMA_EN); 1145 1146 /* step 11. Configure Media. */ 1147 1148 /* step 12. RX_MAC Configuration Register */ 1149 v = CAS_READ_4(sc, CAS_MAC_RX_CONF); 1150 v &= ~(CAS_MAC_RX_CONF_STRPPAD | CAS_MAC_RX_CONF_EN); 1151 v |= CAS_MAC_RX_CONF_STRPFCS; 1152 sc->sc_mac_rxcfg = v; 1153 /* 1154 * Clear the RX filter and reprogram it. This will also set the 1155 * current RX MAC configuration and enable it. 1156 */ 1157 cas_setladrf(sc); 1158 1159 /* step 13. TX_MAC Configuration Register */ 1160 v = CAS_READ_4(sc, CAS_MAC_TX_CONF); 1161 v |= CAS_MAC_TX_CONF_EN; 1162 (void)cas_disable_tx(sc); 1163 CAS_WRITE_4(sc, CAS_MAC_TX_CONF, v); 1164 1165 /* step 14. Issue Transmit Pending command. */ 1166 1167 /* step 15. Give the receiver a swift kick. */ 1168 CAS_WRITE_4(sc, CAS_RX_KICK, CAS_NRXDESC - 4); 1169 CAS_WRITE_4(sc, CAS_RX_COMP_TAIL, 0); 1170 if ((sc->sc_flags & CAS_REG_PLUS) != 0) 1171 CAS_WRITE_4(sc, CAS_RX_KICK2, CAS_NRXDESC2 - 4); 1172 1173 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1174 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1175 1176 mii_mediachg(sc->sc_mii); 1177 1178 /* Start the one second timer. */ 1179 sc->sc_wdog_timer = 0; 1180 callout_reset(&sc->sc_tick_ch, hz, cas_tick, sc); 1181 } 1182 1183 static int 1184 cas_load_txmbuf(struct cas_softc *sc, struct mbuf **m_head) 1185 { 1186 bus_dma_segment_t txsegs[CAS_NTXSEGS]; 1187 struct cas_txsoft *txs; 1188 struct ip *ip; 1189 struct mbuf *m; 1190 uint64_t cflags; 1191 int error, nexttx, nsegs, offset, seg; 1192 1193 CAS_LOCK_ASSERT(sc, MA_OWNED); 1194 1195 /* Get a work queue entry. */ 1196 if ((txs = STAILQ_FIRST(&sc->sc_txfreeq)) == NULL) { 1197 /* Ran out of descriptors. */ 1198 return (ENOBUFS); 1199 } 1200 1201 cflags = 0; 1202 if (((*m_head)->m_pkthdr.csum_flags & CAS_CSUM_FEATURES) != 0) { 1203 if (M_WRITABLE(*m_head) == 0) { 1204 m = m_dup(*m_head, M_NOWAIT); 1205 m_freem(*m_head); 1206 *m_head = m; 1207 if (m == NULL) 1208 return (ENOBUFS); 1209 } 1210 offset = sizeof(struct ether_header); 1211 m = m_pullup(*m_head, offset + sizeof(struct ip)); 1212 if (m == NULL) { 1213 *m_head = NULL; 1214 return (ENOBUFS); 1215 } 1216 ip = (struct ip *)(mtod(m, caddr_t) + offset); 1217 offset += (ip->ip_hl << 2); 1218 cflags = (offset << CAS_TD_CKSUM_START_SHFT) | 1219 ((offset + m->m_pkthdr.csum_data) << 1220 CAS_TD_CKSUM_STUFF_SHFT) | CAS_TD_CKSUM_EN; 1221 *m_head = m; 1222 } 1223 1224 error = bus_dmamap_load_mbuf_sg(sc->sc_tdmatag, txs->txs_dmamap, 1225 *m_head, txsegs, &nsegs, BUS_DMA_NOWAIT); 1226 if (error == EFBIG) { 1227 m = m_collapse(*m_head, M_NOWAIT, CAS_NTXSEGS); 1228 if (m == NULL) { 1229 m_freem(*m_head); 1230 *m_head = NULL; 1231 return (ENOBUFS); 1232 } 1233 *m_head = m; 1234 error = bus_dmamap_load_mbuf_sg(sc->sc_tdmatag, 1235 txs->txs_dmamap, *m_head, txsegs, &nsegs, 1236 BUS_DMA_NOWAIT); 1237 if (error != 0) { 1238 m_freem(*m_head); 1239 *m_head = NULL; 1240 return (error); 1241 } 1242 } else if (error != 0) 1243 return (error); 1244 /* If nsegs is wrong then the stack is corrupt. */ 1245 KASSERT(nsegs <= CAS_NTXSEGS, 1246 ("%s: too many DMA segments (%d)", __func__, nsegs)); 1247 if (nsegs == 0) { 1248 m_freem(*m_head); 1249 *m_head = NULL; 1250 return (EIO); 1251 } 1252 1253 /* 1254 * Ensure we have enough descriptors free to describe 1255 * the packet. Note, we always reserve one descriptor 1256 * at the end of the ring as a termination point, in 1257 * order to prevent wrap-around. 1258 */ 1259 if (nsegs > sc->sc_txfree - 1) { 1260 txs->txs_ndescs = 0; 1261 bus_dmamap_unload(sc->sc_tdmatag, txs->txs_dmamap); 1262 return (ENOBUFS); 1263 } 1264 1265 txs->txs_ndescs = nsegs; 1266 txs->txs_firstdesc = sc->sc_txnext; 1267 nexttx = txs->txs_firstdesc; 1268 for (seg = 0; seg < nsegs; seg++, nexttx = CAS_NEXTTX(nexttx)) { 1269 #ifdef CAS_DEBUG 1270 CTR6(KTR_CAS, 1271 "%s: mapping seg %d (txd %d), len %lx, addr %#lx (%#lx)", 1272 __func__, seg, nexttx, txsegs[seg].ds_len, 1273 txsegs[seg].ds_addr, htole64(txsegs[seg].ds_addr)); 1274 #endif 1275 sc->sc_txdescs[nexttx].cd_buf_ptr = 1276 htole64(txsegs[seg].ds_addr); 1277 KASSERT(txsegs[seg].ds_len < 1278 CAS_TD_BUF_LEN_MASK >> CAS_TD_BUF_LEN_SHFT, 1279 ("%s: segment size too large!", __func__)); 1280 sc->sc_txdescs[nexttx].cd_flags = 1281 htole64(txsegs[seg].ds_len << CAS_TD_BUF_LEN_SHFT); 1282 txs->txs_lastdesc = nexttx; 1283 } 1284 1285 /* Set EOF on the last descriptor. */ 1286 #ifdef CAS_DEBUG 1287 CTR3(KTR_CAS, "%s: end of frame at segment %d, TX %d", 1288 __func__, seg, nexttx); 1289 #endif 1290 sc->sc_txdescs[txs->txs_lastdesc].cd_flags |= 1291 htole64(CAS_TD_END_OF_FRAME); 1292 1293 /* Lastly set SOF on the first descriptor. */ 1294 #ifdef CAS_DEBUG 1295 CTR3(KTR_CAS, "%s: start of frame at segment %d, TX %d", 1296 __func__, seg, nexttx); 1297 #endif 1298 if (sc->sc_txwin += nsegs > CAS_MAXTXFREE * 2 / 3) { 1299 sc->sc_txwin = 0; 1300 sc->sc_txdescs[txs->txs_firstdesc].cd_flags |= 1301 htole64(cflags | CAS_TD_START_OF_FRAME | CAS_TD_INT_ME); 1302 } else 1303 sc->sc_txdescs[txs->txs_firstdesc].cd_flags |= 1304 htole64(cflags | CAS_TD_START_OF_FRAME); 1305 1306 /* Sync the DMA map. */ 1307 bus_dmamap_sync(sc->sc_tdmatag, txs->txs_dmamap, 1308 BUS_DMASYNC_PREWRITE); 1309 1310 #ifdef CAS_DEBUG 1311 CTR4(KTR_CAS, "%s: setting firstdesc=%d, lastdesc=%d, ndescs=%d", 1312 __func__, txs->txs_firstdesc, txs->txs_lastdesc, 1313 txs->txs_ndescs); 1314 #endif 1315 STAILQ_REMOVE_HEAD(&sc->sc_txfreeq, txs_q); 1316 STAILQ_INSERT_TAIL(&sc->sc_txdirtyq, txs, txs_q); 1317 txs->txs_mbuf = *m_head; 1318 1319 sc->sc_txnext = CAS_NEXTTX(txs->txs_lastdesc); 1320 sc->sc_txfree -= txs->txs_ndescs; 1321 1322 return (0); 1323 } 1324 1325 static void 1326 cas_init_regs(struct cas_softc *sc) 1327 { 1328 int i; 1329 const u_char *laddr = IF_LLADDR(sc->sc_ifp); 1330 1331 CAS_LOCK_ASSERT(sc, MA_OWNED); 1332 1333 /* These registers are not cleared on reset. */ 1334 if ((sc->sc_flags & CAS_INITED) == 0) { 1335 /* magic values */ 1336 CAS_WRITE_4(sc, CAS_MAC_IPG0, 0); 1337 CAS_WRITE_4(sc, CAS_MAC_IPG1, 8); 1338 CAS_WRITE_4(sc, CAS_MAC_IPG2, 4); 1339 1340 /* min frame length */ 1341 CAS_WRITE_4(sc, CAS_MAC_MIN_FRAME, ETHER_MIN_LEN); 1342 /* max frame length and max burst size */ 1343 CAS_WRITE_4(sc, CAS_MAC_MAX_BF, 1344 ((ETHER_MAX_LEN_JUMBO + ETHER_VLAN_ENCAP_LEN) << 1345 CAS_MAC_MAX_BF_FRM_SHFT) | 1346 (0x2000 << CAS_MAC_MAX_BF_BST_SHFT)); 1347 1348 /* more magic values */ 1349 CAS_WRITE_4(sc, CAS_MAC_PREAMBLE_LEN, 0x7); 1350 CAS_WRITE_4(sc, CAS_MAC_JAM_SIZE, 0x4); 1351 CAS_WRITE_4(sc, CAS_MAC_ATTEMPT_LIMIT, 0x10); 1352 CAS_WRITE_4(sc, CAS_MAC_CTRL_TYPE, 0x8808); 1353 1354 /* random number seed */ 1355 CAS_WRITE_4(sc, CAS_MAC_RANDOM_SEED, 1356 ((laddr[5] << 8) | laddr[4]) & 0x3ff); 1357 1358 /* secondary MAC addresses: 0:0:0:0:0:0 */ 1359 for (i = CAS_MAC_ADDR3; i <= CAS_MAC_ADDR41; 1360 i += CAS_MAC_ADDR4 - CAS_MAC_ADDR3) 1361 CAS_WRITE_4(sc, i, 0); 1362 1363 /* MAC control address: 01:80:c2:00:00:01 */ 1364 CAS_WRITE_4(sc, CAS_MAC_ADDR42, 0x0001); 1365 CAS_WRITE_4(sc, CAS_MAC_ADDR43, 0xc200); 1366 CAS_WRITE_4(sc, CAS_MAC_ADDR44, 0x0180); 1367 1368 /* MAC filter address: 0:0:0:0:0:0 */ 1369 CAS_WRITE_4(sc, CAS_MAC_AFILTER0, 0); 1370 CAS_WRITE_4(sc, CAS_MAC_AFILTER1, 0); 1371 CAS_WRITE_4(sc, CAS_MAC_AFILTER2, 0); 1372 CAS_WRITE_4(sc, CAS_MAC_AFILTER_MASK1_2, 0); 1373 CAS_WRITE_4(sc, CAS_MAC_AFILTER_MASK0, 0); 1374 1375 /* Zero the hash table. */ 1376 for (i = CAS_MAC_HASH0; i <= CAS_MAC_HASH15; 1377 i += CAS_MAC_HASH1 - CAS_MAC_HASH0) 1378 CAS_WRITE_4(sc, i, 0); 1379 1380 sc->sc_flags |= CAS_INITED; 1381 } 1382 1383 /* Counters need to be zeroed. */ 1384 CAS_WRITE_4(sc, CAS_MAC_NORM_COLL_CNT, 0); 1385 CAS_WRITE_4(sc, CAS_MAC_FIRST_COLL_CNT, 0); 1386 CAS_WRITE_4(sc, CAS_MAC_EXCESS_COLL_CNT, 0); 1387 CAS_WRITE_4(sc, CAS_MAC_LATE_COLL_CNT, 0); 1388 CAS_WRITE_4(sc, CAS_MAC_DEFER_TMR_CNT, 0); 1389 CAS_WRITE_4(sc, CAS_MAC_PEAK_ATTEMPTS, 0); 1390 CAS_WRITE_4(sc, CAS_MAC_RX_FRAME_COUNT, 0); 1391 CAS_WRITE_4(sc, CAS_MAC_RX_LEN_ERR_CNT, 0); 1392 CAS_WRITE_4(sc, CAS_MAC_RX_ALIGN_ERR, 0); 1393 CAS_WRITE_4(sc, CAS_MAC_RX_CRC_ERR_CNT, 0); 1394 CAS_WRITE_4(sc, CAS_MAC_RX_CODE_VIOL, 0); 1395 1396 /* Set XOFF PAUSE time. */ 1397 CAS_WRITE_4(sc, CAS_MAC_SPC, 0x1BF0 << CAS_MAC_SPC_TIME_SHFT); 1398 1399 /* Set the station address. */ 1400 CAS_WRITE_4(sc, CAS_MAC_ADDR0, (laddr[4] << 8) | laddr[5]); 1401 CAS_WRITE_4(sc, CAS_MAC_ADDR1, (laddr[2] << 8) | laddr[3]); 1402 CAS_WRITE_4(sc, CAS_MAC_ADDR2, (laddr[0] << 8) | laddr[1]); 1403 1404 /* Enable MII outputs. */ 1405 CAS_WRITE_4(sc, CAS_MAC_XIF_CONF, CAS_MAC_XIF_CONF_TX_OE); 1406 } 1407 1408 static void 1409 cas_tx_task(void *arg, int pending __unused) 1410 { 1411 struct ifnet *ifp; 1412 1413 ifp = (struct ifnet *)arg; 1414 cas_start(ifp); 1415 } 1416 1417 static inline void 1418 cas_txkick(struct cas_softc *sc) 1419 { 1420 1421 /* 1422 * Update the TX kick register. This register has to point to the 1423 * descriptor after the last valid one and for optimum performance 1424 * should be incremented in multiples of 4 (the DMA engine fetches/ 1425 * updates descriptors in batches of 4). 1426 */ 1427 #ifdef CAS_DEBUG 1428 CTR3(KTR_CAS, "%s: %s: kicking TX %d", 1429 device_get_name(sc->sc_dev), __func__, sc->sc_txnext); 1430 #endif 1431 CAS_CDSYNC(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1432 CAS_WRITE_4(sc, CAS_TX_KICK3, sc->sc_txnext); 1433 } 1434 1435 static void 1436 cas_start(struct ifnet *ifp) 1437 { 1438 struct cas_softc *sc = ifp->if_softc; 1439 struct mbuf *m; 1440 int kicked, ntx; 1441 1442 CAS_LOCK(sc); 1443 1444 if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) != 1445 IFF_DRV_RUNNING || (sc->sc_flags & CAS_LINK) == 0) { 1446 CAS_UNLOCK(sc); 1447 return; 1448 } 1449 1450 if (sc->sc_txfree < CAS_MAXTXFREE / 4) 1451 cas_tint(sc); 1452 1453 #ifdef CAS_DEBUG 1454 CTR4(KTR_CAS, "%s: %s: txfree %d, txnext %d", 1455 device_get_name(sc->sc_dev), __func__, sc->sc_txfree, 1456 sc->sc_txnext); 1457 #endif 1458 ntx = 0; 1459 kicked = 0; 1460 for (; !IFQ_DRV_IS_EMPTY(&ifp->if_snd) && sc->sc_txfree > 1;) { 1461 IFQ_DRV_DEQUEUE(&ifp->if_snd, m); 1462 if (m == NULL) 1463 break; 1464 if (cas_load_txmbuf(sc, &m) != 0) { 1465 if (m == NULL) 1466 break; 1467 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 1468 IFQ_DRV_PREPEND(&ifp->if_snd, m); 1469 break; 1470 } 1471 if ((sc->sc_txnext % 4) == 0) { 1472 cas_txkick(sc); 1473 kicked = 1; 1474 } else 1475 kicked = 0; 1476 ntx++; 1477 BPF_MTAP(ifp, m); 1478 } 1479 1480 if (ntx > 0) { 1481 if (kicked == 0) 1482 cas_txkick(sc); 1483 #ifdef CAS_DEBUG 1484 CTR2(KTR_CAS, "%s: packets enqueued, OWN on %d", 1485 device_get_name(sc->sc_dev), sc->sc_txnext); 1486 #endif 1487 1488 /* Set a watchdog timer in case the chip flakes out. */ 1489 sc->sc_wdog_timer = 5; 1490 #ifdef CAS_DEBUG 1491 CTR3(KTR_CAS, "%s: %s: watchdog %d", 1492 device_get_name(sc->sc_dev), __func__, 1493 sc->sc_wdog_timer); 1494 #endif 1495 } 1496 1497 CAS_UNLOCK(sc); 1498 } 1499 1500 static void 1501 cas_tint(struct cas_softc *sc) 1502 { 1503 struct ifnet *ifp = sc->sc_ifp; 1504 struct cas_txsoft *txs; 1505 int progress; 1506 uint32_t txlast; 1507 #ifdef CAS_DEBUG 1508 int i; 1509 1510 CAS_LOCK_ASSERT(sc, MA_OWNED); 1511 1512 CTR2(KTR_CAS, "%s: %s", device_get_name(sc->sc_dev), __func__); 1513 #endif 1514 1515 /* 1516 * Go through our TX list and free mbufs for those 1517 * frames that have been transmitted. 1518 */ 1519 progress = 0; 1520 CAS_CDSYNC(sc, BUS_DMASYNC_POSTREAD); 1521 while ((txs = STAILQ_FIRST(&sc->sc_txdirtyq)) != NULL) { 1522 #ifdef CAS_DEBUG 1523 if ((ifp->if_flags & IFF_DEBUG) != 0) { 1524 printf(" txsoft %p transmit chain:\n", txs); 1525 for (i = txs->txs_firstdesc;; i = CAS_NEXTTX(i)) { 1526 printf("descriptor %d: ", i); 1527 printf("cd_flags: 0x%016llx\t", 1528 (long long)le64toh( 1529 sc->sc_txdescs[i].cd_flags)); 1530 printf("cd_buf_ptr: 0x%016llx\n", 1531 (long long)le64toh( 1532 sc->sc_txdescs[i].cd_buf_ptr)); 1533 if (i == txs->txs_lastdesc) 1534 break; 1535 } 1536 } 1537 #endif 1538 1539 /* 1540 * In theory, we could harvest some descriptors before 1541 * the ring is empty, but that's a bit complicated. 1542 * 1543 * CAS_TX_COMPn points to the last descriptor 1544 * processed + 1. 1545 */ 1546 txlast = CAS_READ_4(sc, CAS_TX_COMP3); 1547 #ifdef CAS_DEBUG 1548 CTR4(KTR_CAS, "%s: txs->txs_firstdesc = %d, " 1549 "txs->txs_lastdesc = %d, txlast = %d", 1550 __func__, txs->txs_firstdesc, txs->txs_lastdesc, txlast); 1551 #endif 1552 if (txs->txs_firstdesc <= txs->txs_lastdesc) { 1553 if ((txlast >= txs->txs_firstdesc) && 1554 (txlast <= txs->txs_lastdesc)) 1555 break; 1556 } else { 1557 /* Ick -- this command wraps. */ 1558 if ((txlast >= txs->txs_firstdesc) || 1559 (txlast <= txs->txs_lastdesc)) 1560 break; 1561 } 1562 1563 #ifdef CAS_DEBUG 1564 CTR1(KTR_CAS, "%s: releasing a descriptor", __func__); 1565 #endif 1566 STAILQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q); 1567 1568 sc->sc_txfree += txs->txs_ndescs; 1569 1570 bus_dmamap_sync(sc->sc_tdmatag, txs->txs_dmamap, 1571 BUS_DMASYNC_POSTWRITE); 1572 bus_dmamap_unload(sc->sc_tdmatag, txs->txs_dmamap); 1573 if (txs->txs_mbuf != NULL) { 1574 m_freem(txs->txs_mbuf); 1575 txs->txs_mbuf = NULL; 1576 } 1577 1578 STAILQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 1579 1580 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 1581 progress = 1; 1582 } 1583 1584 #ifdef CAS_DEBUG 1585 CTR5(KTR_CAS, "%s: CAS_TX_SM1 %x CAS_TX_SM2 %x CAS_TX_DESC_BASE %llx " 1586 "CAS_TX_COMP3 %x", 1587 __func__, CAS_READ_4(sc, CAS_TX_SM1), CAS_READ_4(sc, CAS_TX_SM2), 1588 ((long long)CAS_READ_4(sc, CAS_TX_DESC3_BASE_HI) << 32) | 1589 CAS_READ_4(sc, CAS_TX_DESC3_BASE_LO), 1590 CAS_READ_4(sc, CAS_TX_COMP3)); 1591 #endif 1592 1593 if (progress) { 1594 /* We freed some descriptors, so reset IFF_DRV_OACTIVE. */ 1595 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1596 if (STAILQ_EMPTY(&sc->sc_txdirtyq)) 1597 sc->sc_wdog_timer = 0; 1598 } 1599 1600 #ifdef CAS_DEBUG 1601 CTR3(KTR_CAS, "%s: %s: watchdog %d", 1602 device_get_name(sc->sc_dev), __func__, sc->sc_wdog_timer); 1603 #endif 1604 } 1605 1606 static void 1607 cas_rint_timeout(void *arg) 1608 { 1609 struct epoch_tracker et; 1610 struct cas_softc *sc = arg; 1611 1612 CAS_LOCK_ASSERT(sc, MA_OWNED); 1613 1614 NET_EPOCH_ENTER(et); 1615 cas_rint(sc); 1616 NET_EPOCH_EXIT(et); 1617 } 1618 1619 static void 1620 cas_rint(struct cas_softc *sc) 1621 { 1622 struct cas_rxdsoft *rxds, *rxds2; 1623 struct ifnet *ifp = sc->sc_ifp; 1624 struct mbuf *m, *m2; 1625 uint64_t word1, word2, word3 __unused, word4; 1626 uint32_t rxhead; 1627 u_int idx, idx2, len, off, skip; 1628 1629 CAS_LOCK_ASSERT(sc, MA_OWNED); 1630 1631 callout_stop(&sc->sc_rx_ch); 1632 1633 #ifdef CAS_DEBUG 1634 CTR2(KTR_CAS, "%s: %s", device_get_name(sc->sc_dev), __func__); 1635 #endif 1636 1637 #define PRINTWORD(n, delimiter) \ 1638 printf("word ## n: 0x%016llx%c", (long long)word ## n, delimiter) 1639 1640 #define SKIPASSERT(n) \ 1641 KASSERT(sc->sc_rxcomps[sc->sc_rxcptr].crc_word ## n == 0, \ 1642 ("%s: word ## n not 0", __func__)) 1643 1644 #define WORDTOH(n) \ 1645 word ## n = le64toh(sc->sc_rxcomps[sc->sc_rxcptr].crc_word ## n) 1646 1647 /* 1648 * Read the completion head register once. This limits 1649 * how long the following loop can execute. 1650 */ 1651 rxhead = CAS_READ_4(sc, CAS_RX_COMP_HEAD); 1652 #ifdef CAS_DEBUG 1653 CTR4(KTR_CAS, "%s: sc->sc_rxcptr %d, sc->sc_rxdptr %d, head %d", 1654 __func__, sc->sc_rxcptr, sc->sc_rxdptr, rxhead); 1655 #endif 1656 skip = 0; 1657 CAS_CDSYNC(sc, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1658 for (; sc->sc_rxcptr != rxhead; 1659 sc->sc_rxcptr = CAS_NEXTRXCOMP(sc->sc_rxcptr)) { 1660 if (skip != 0) { 1661 SKIPASSERT(1); 1662 SKIPASSERT(2); 1663 SKIPASSERT(3); 1664 1665 --skip; 1666 goto skip; 1667 } 1668 1669 WORDTOH(1); 1670 WORDTOH(2); 1671 WORDTOH(3); 1672 WORDTOH(4); 1673 1674 #ifdef CAS_DEBUG 1675 if ((ifp->if_flags & IFF_DEBUG) != 0) { 1676 printf(" completion %d: ", sc->sc_rxcptr); 1677 PRINTWORD(1, '\t'); 1678 PRINTWORD(2, '\t'); 1679 PRINTWORD(3, '\t'); 1680 PRINTWORD(4, '\n'); 1681 } 1682 #endif 1683 1684 if (__predict_false( 1685 (word1 & CAS_RC1_TYPE_MASK) == CAS_RC1_TYPE_HW || 1686 (word4 & CAS_RC4_ZERO) != 0)) { 1687 /* 1688 * The descriptor is still marked as owned, although 1689 * it is supposed to have completed. This has been 1690 * observed on some machines. Just exiting here 1691 * might leave the packet sitting around until another 1692 * one arrives to trigger a new interrupt, which is 1693 * generally undesirable, so set up a timeout. 1694 */ 1695 callout_reset(&sc->sc_rx_ch, CAS_RXOWN_TICKS, 1696 cas_rint_timeout, sc); 1697 break; 1698 } 1699 1700 if (__predict_false( 1701 (word4 & (CAS_RC4_BAD | CAS_RC4_LEN_MMATCH)) != 0)) { 1702 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 1703 device_printf(sc->sc_dev, 1704 "receive error: CRC error\n"); 1705 continue; 1706 } 1707 1708 KASSERT(CAS_GET(word1, CAS_RC1_DATA_SIZE) == 0 || 1709 CAS_GET(word2, CAS_RC2_HDR_SIZE) == 0, 1710 ("%s: data and header present", __func__)); 1711 KASSERT((word1 & CAS_RC1_SPLIT_PKT) == 0 || 1712 CAS_GET(word2, CAS_RC2_HDR_SIZE) == 0, 1713 ("%s: split and header present", __func__)); 1714 KASSERT(CAS_GET(word1, CAS_RC1_DATA_SIZE) == 0 || 1715 (word1 & CAS_RC1_RELEASE_HDR) == 0, 1716 ("%s: data present but header release", __func__)); 1717 KASSERT(CAS_GET(word2, CAS_RC2_HDR_SIZE) == 0 || 1718 (word1 & CAS_RC1_RELEASE_DATA) == 0, 1719 ("%s: header present but data release", __func__)); 1720 1721 if ((len = CAS_GET(word2, CAS_RC2_HDR_SIZE)) != 0) { 1722 idx = CAS_GET(word2, CAS_RC2_HDR_INDEX); 1723 off = CAS_GET(word2, CAS_RC2_HDR_OFF); 1724 #ifdef CAS_DEBUG 1725 CTR4(KTR_CAS, "%s: hdr at idx %d, off %d, len %d", 1726 __func__, idx, off, len); 1727 #endif 1728 rxds = &sc->sc_rxdsoft[idx]; 1729 MGETHDR(m, M_NOWAIT, MT_DATA); 1730 if (m != NULL) { 1731 refcount_acquire(&rxds->rxds_refcount); 1732 bus_dmamap_sync(sc->sc_rdmatag, 1733 rxds->rxds_dmamap, BUS_DMASYNC_POSTREAD); 1734 m_extadd(m, (char *)rxds->rxds_buf + 1735 off * 256 + ETHER_ALIGN, len, cas_free, 1736 sc, (void *)(uintptr_t)idx, 1737 M_RDONLY, EXT_NET_DRV); 1738 if ((m->m_flags & M_EXT) == 0) { 1739 m_freem(m); 1740 m = NULL; 1741 } 1742 } 1743 if (m != NULL) { 1744 m->m_pkthdr.rcvif = ifp; 1745 m->m_pkthdr.len = m->m_len = len; 1746 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); 1747 if ((ifp->if_capenable & IFCAP_RXCSUM) != 0) 1748 cas_rxcksum(m, CAS_GET(word4, 1749 CAS_RC4_TCP_CSUM)); 1750 /* Pass it on. */ 1751 CAS_UNLOCK(sc); 1752 (*ifp->if_input)(ifp, m); 1753 CAS_LOCK(sc); 1754 } else 1755 if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1); 1756 1757 if ((word1 & CAS_RC1_RELEASE_HDR) != 0 && 1758 refcount_release(&rxds->rxds_refcount) != 0) 1759 cas_add_rxdesc(sc, idx); 1760 } else if ((len = CAS_GET(word1, CAS_RC1_DATA_SIZE)) != 0) { 1761 idx = CAS_GET(word1, CAS_RC1_DATA_INDEX); 1762 off = CAS_GET(word1, CAS_RC1_DATA_OFF); 1763 #ifdef CAS_DEBUG 1764 CTR4(KTR_CAS, "%s: data at idx %d, off %d, len %d", 1765 __func__, idx, off, len); 1766 #endif 1767 rxds = &sc->sc_rxdsoft[idx]; 1768 MGETHDR(m, M_NOWAIT, MT_DATA); 1769 if (m != NULL) { 1770 refcount_acquire(&rxds->rxds_refcount); 1771 off += ETHER_ALIGN; 1772 m->m_len = min(CAS_PAGE_SIZE - off, len); 1773 bus_dmamap_sync(sc->sc_rdmatag, 1774 rxds->rxds_dmamap, BUS_DMASYNC_POSTREAD); 1775 m_extadd(m, (char *)rxds->rxds_buf + off, 1776 m->m_len, cas_free, sc, 1777 (void *)(uintptr_t)idx, M_RDONLY, 1778 EXT_NET_DRV); 1779 if ((m->m_flags & M_EXT) == 0) { 1780 m_freem(m); 1781 m = NULL; 1782 } 1783 } 1784 idx2 = 0; 1785 m2 = NULL; 1786 rxds2 = NULL; 1787 if ((word1 & CAS_RC1_SPLIT_PKT) != 0) { 1788 KASSERT((word1 & CAS_RC1_RELEASE_NEXT) != 0, 1789 ("%s: split but no release next", 1790 __func__)); 1791 1792 idx2 = CAS_GET(word2, CAS_RC2_NEXT_INDEX); 1793 #ifdef CAS_DEBUG 1794 CTR2(KTR_CAS, "%s: split at idx %d", 1795 __func__, idx2); 1796 #endif 1797 rxds2 = &sc->sc_rxdsoft[idx2]; 1798 if (m != NULL) { 1799 MGET(m2, M_NOWAIT, MT_DATA); 1800 if (m2 != NULL) { 1801 refcount_acquire( 1802 &rxds2->rxds_refcount); 1803 m2->m_len = len - m->m_len; 1804 bus_dmamap_sync( 1805 sc->sc_rdmatag, 1806 rxds2->rxds_dmamap, 1807 BUS_DMASYNC_POSTREAD); 1808 m_extadd(m2, 1809 (char *)rxds2->rxds_buf, 1810 m2->m_len, cas_free, sc, 1811 (void *)(uintptr_t)idx2, 1812 M_RDONLY, EXT_NET_DRV); 1813 if ((m2->m_flags & M_EXT) == 1814 0) { 1815 m_freem(m2); 1816 m2 = NULL; 1817 } 1818 } 1819 } 1820 if (m2 != NULL) 1821 m->m_next = m2; 1822 else if (m != NULL) { 1823 m_freem(m); 1824 m = NULL; 1825 } 1826 } 1827 if (m != NULL) { 1828 m->m_pkthdr.rcvif = ifp; 1829 m->m_pkthdr.len = len; 1830 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); 1831 if ((ifp->if_capenable & IFCAP_RXCSUM) != 0) 1832 cas_rxcksum(m, CAS_GET(word4, 1833 CAS_RC4_TCP_CSUM)); 1834 /* Pass it on. */ 1835 CAS_UNLOCK(sc); 1836 (*ifp->if_input)(ifp, m); 1837 CAS_LOCK(sc); 1838 } else 1839 if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1); 1840 1841 if ((word1 & CAS_RC1_RELEASE_DATA) != 0 && 1842 refcount_release(&rxds->rxds_refcount) != 0) 1843 cas_add_rxdesc(sc, idx); 1844 if ((word1 & CAS_RC1_SPLIT_PKT) != 0 && 1845 refcount_release(&rxds2->rxds_refcount) != 0) 1846 cas_add_rxdesc(sc, idx2); 1847 } 1848 1849 skip = CAS_GET(word1, CAS_RC1_SKIP); 1850 1851 skip: 1852 cas_rxcompinit(&sc->sc_rxcomps[sc->sc_rxcptr]); 1853 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1854 break; 1855 } 1856 CAS_CDSYNC(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1857 CAS_WRITE_4(sc, CAS_RX_COMP_TAIL, sc->sc_rxcptr); 1858 1859 #undef PRINTWORD 1860 #undef SKIPASSERT 1861 #undef WORDTOH 1862 1863 #ifdef CAS_DEBUG 1864 CTR4(KTR_CAS, "%s: done sc->sc_rxcptr %d, sc->sc_rxdptr %d, head %d", 1865 __func__, sc->sc_rxcptr, sc->sc_rxdptr, 1866 CAS_READ_4(sc, CAS_RX_COMP_HEAD)); 1867 #endif 1868 } 1869 1870 static void 1871 cas_free(struct mbuf *m) 1872 { 1873 struct cas_rxdsoft *rxds; 1874 struct cas_softc *sc; 1875 u_int idx, locked; 1876 1877 sc = m->m_ext.ext_arg1; 1878 idx = (uintptr_t)m->m_ext.ext_arg2; 1879 rxds = &sc->sc_rxdsoft[idx]; 1880 if (refcount_release(&rxds->rxds_refcount) == 0) 1881 return; 1882 1883 /* 1884 * NB: this function can be called via m_freem(9) within 1885 * this driver! 1886 */ 1887 if ((locked = CAS_LOCK_OWNED(sc)) == 0) 1888 CAS_LOCK(sc); 1889 cas_add_rxdesc(sc, idx); 1890 if (locked == 0) 1891 CAS_UNLOCK(sc); 1892 } 1893 1894 static inline void 1895 cas_add_rxdesc(struct cas_softc *sc, u_int idx) 1896 { 1897 1898 CAS_LOCK_ASSERT(sc, MA_OWNED); 1899 1900 bus_dmamap_sync(sc->sc_rdmatag, sc->sc_rxdsoft[idx].rxds_dmamap, 1901 BUS_DMASYNC_PREREAD); 1902 CAS_UPDATE_RXDESC(sc, sc->sc_rxdptr, idx); 1903 sc->sc_rxdptr = CAS_NEXTRXDESC(sc->sc_rxdptr); 1904 1905 /* 1906 * Update the RX kick register. This register has to point to the 1907 * descriptor after the last valid one (before the current batch) 1908 * and for optimum performance should be incremented in multiples 1909 * of 4 (the DMA engine fetches/updates descriptors in batches of 4). 1910 */ 1911 if ((sc->sc_rxdptr % 4) == 0) { 1912 CAS_CDSYNC(sc, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1913 CAS_WRITE_4(sc, CAS_RX_KICK, 1914 (sc->sc_rxdptr + CAS_NRXDESC - 4) & CAS_NRXDESC_MASK); 1915 } 1916 } 1917 1918 static void 1919 cas_eint(struct cas_softc *sc, u_int status) 1920 { 1921 struct ifnet *ifp = sc->sc_ifp; 1922 1923 CAS_LOCK_ASSERT(sc, MA_OWNED); 1924 1925 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 1926 1927 device_printf(sc->sc_dev, "%s: status 0x%x", __func__, status); 1928 if ((status & CAS_INTR_PCI_ERROR_INT) != 0) { 1929 status = CAS_READ_4(sc, CAS_ERROR_STATUS); 1930 printf(", PCI bus error 0x%x", status); 1931 if ((status & CAS_ERROR_OTHER) != 0) { 1932 status = pci_read_config(sc->sc_dev, PCIR_STATUS, 2); 1933 printf(", PCI status 0x%x", status); 1934 pci_write_config(sc->sc_dev, PCIR_STATUS, status, 2); 1935 } 1936 } 1937 printf("\n"); 1938 1939 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1940 cas_init_locked(sc); 1941 if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) 1942 taskqueue_enqueue(sc->sc_tq, &sc->sc_tx_task); 1943 } 1944 1945 static int 1946 cas_intr(void *v) 1947 { 1948 struct cas_softc *sc = v; 1949 1950 if (__predict_false((CAS_READ_4(sc, CAS_STATUS_ALIAS) & 1951 CAS_INTR_SUMMARY) == 0)) 1952 return (FILTER_STRAY); 1953 1954 /* Disable interrupts. */ 1955 CAS_WRITE_4(sc, CAS_INTMASK, 0xffffffff); 1956 taskqueue_enqueue(sc->sc_tq, &sc->sc_intr_task); 1957 1958 return (FILTER_HANDLED); 1959 } 1960 1961 static void 1962 cas_intr_task(void *arg, int pending __unused) 1963 { 1964 struct cas_softc *sc = arg; 1965 struct ifnet *ifp = sc->sc_ifp; 1966 uint32_t status, status2; 1967 1968 CAS_LOCK_ASSERT(sc, MA_NOTOWNED); 1969 1970 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1971 return; 1972 1973 status = CAS_READ_4(sc, CAS_STATUS); 1974 if (__predict_false((status & CAS_INTR_SUMMARY) == 0)) 1975 goto done; 1976 1977 CAS_LOCK(sc); 1978 #ifdef CAS_DEBUG 1979 CTR4(KTR_CAS, "%s: %s: cplt %x, status %x", 1980 device_get_name(sc->sc_dev), __func__, 1981 (status >> CAS_STATUS_TX_COMP3_SHFT), (u_int)status); 1982 1983 /* 1984 * PCS interrupts must be cleared, otherwise no traffic is passed! 1985 */ 1986 if ((status & CAS_INTR_PCS_INT) != 0) { 1987 status2 = 1988 CAS_READ_4(sc, CAS_PCS_INTR_STATUS) | 1989 CAS_READ_4(sc, CAS_PCS_INTR_STATUS); 1990 if ((status2 & CAS_PCS_INTR_LINK) != 0) 1991 device_printf(sc->sc_dev, 1992 "%s: PCS link status changed\n", __func__); 1993 } 1994 if ((status & CAS_MAC_CTRL_STATUS) != 0) { 1995 status2 = CAS_READ_4(sc, CAS_MAC_CTRL_STATUS); 1996 if ((status2 & CAS_MAC_CTRL_PAUSE) != 0) 1997 device_printf(sc->sc_dev, 1998 "%s: PAUSE received (PAUSE time %d slots)\n", 1999 __func__, 2000 (status2 & CAS_MAC_CTRL_STATUS_PT_MASK) >> 2001 CAS_MAC_CTRL_STATUS_PT_SHFT); 2002 if ((status2 & CAS_MAC_CTRL_PAUSE) != 0) 2003 device_printf(sc->sc_dev, 2004 "%s: transited to PAUSE state\n", __func__); 2005 if ((status2 & CAS_MAC_CTRL_NON_PAUSE) != 0) 2006 device_printf(sc->sc_dev, 2007 "%s: transited to non-PAUSE state\n", __func__); 2008 } 2009 if ((status & CAS_INTR_MIF) != 0) 2010 device_printf(sc->sc_dev, "%s: MIF interrupt\n", __func__); 2011 #endif 2012 2013 if (__predict_false((status & 2014 (CAS_INTR_TX_TAG_ERR | CAS_INTR_RX_TAG_ERR | 2015 CAS_INTR_RX_LEN_MMATCH | CAS_INTR_PCI_ERROR_INT)) != 0)) { 2016 cas_eint(sc, status); 2017 CAS_UNLOCK(sc); 2018 return; 2019 } 2020 2021 if (__predict_false(status & CAS_INTR_TX_MAC_INT)) { 2022 status2 = CAS_READ_4(sc, CAS_MAC_TX_STATUS); 2023 if ((status2 & 2024 (CAS_MAC_TX_UNDERRUN | CAS_MAC_TX_MAX_PKT_ERR)) != 0) 2025 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2026 else if ((status2 & ~CAS_MAC_TX_FRAME_XMTD) != 0) 2027 device_printf(sc->sc_dev, 2028 "MAC TX fault, status %x\n", status2); 2029 } 2030 2031 if (__predict_false(status & CAS_INTR_RX_MAC_INT)) { 2032 status2 = CAS_READ_4(sc, CAS_MAC_RX_STATUS); 2033 if ((status2 & CAS_MAC_RX_OVERFLOW) != 0) 2034 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 2035 else if ((status2 & ~CAS_MAC_RX_FRAME_RCVD) != 0) 2036 device_printf(sc->sc_dev, 2037 "MAC RX fault, status %x\n", status2); 2038 } 2039 2040 if ((status & 2041 (CAS_INTR_RX_DONE | CAS_INTR_RX_BUF_NA | CAS_INTR_RX_COMP_FULL | 2042 CAS_INTR_RX_BUF_AEMPTY | CAS_INTR_RX_COMP_AFULL)) != 0) { 2043 cas_rint(sc); 2044 #ifdef CAS_DEBUG 2045 if (__predict_false((status & 2046 (CAS_INTR_RX_BUF_NA | CAS_INTR_RX_COMP_FULL | 2047 CAS_INTR_RX_BUF_AEMPTY | CAS_INTR_RX_COMP_AFULL)) != 0)) 2048 device_printf(sc->sc_dev, 2049 "RX fault, status %x\n", status); 2050 #endif 2051 } 2052 2053 if ((status & 2054 (CAS_INTR_TX_INT_ME | CAS_INTR_TX_ALL | CAS_INTR_TX_DONE)) != 0) 2055 cas_tint(sc); 2056 2057 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 2058 CAS_UNLOCK(sc); 2059 return; 2060 } else if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) 2061 taskqueue_enqueue(sc->sc_tq, &sc->sc_tx_task); 2062 CAS_UNLOCK(sc); 2063 2064 status = CAS_READ_4(sc, CAS_STATUS_ALIAS); 2065 if (__predict_false((status & CAS_INTR_SUMMARY) != 0)) { 2066 taskqueue_enqueue(sc->sc_tq, &sc->sc_intr_task); 2067 return; 2068 } 2069 2070 done: 2071 /* Re-enable interrupts. */ 2072 CAS_WRITE_4(sc, CAS_INTMASK, 2073 ~(CAS_INTR_TX_INT_ME | CAS_INTR_TX_TAG_ERR | 2074 CAS_INTR_RX_DONE | CAS_INTR_RX_BUF_NA | CAS_INTR_RX_TAG_ERR | 2075 CAS_INTR_RX_COMP_FULL | CAS_INTR_RX_BUF_AEMPTY | 2076 CAS_INTR_RX_COMP_AFULL | CAS_INTR_RX_LEN_MMATCH | 2077 CAS_INTR_PCI_ERROR_INT 2078 #ifdef CAS_DEBUG 2079 | CAS_INTR_PCS_INT | CAS_INTR_MIF 2080 #endif 2081 )); 2082 } 2083 2084 static void 2085 cas_watchdog(struct cas_softc *sc) 2086 { 2087 struct ifnet *ifp = sc->sc_ifp; 2088 2089 CAS_LOCK_ASSERT(sc, MA_OWNED); 2090 2091 #ifdef CAS_DEBUG 2092 CTR4(KTR_CAS, 2093 "%s: CAS_RX_CONF %x CAS_MAC_RX_STATUS %x CAS_MAC_RX_CONF %x", 2094 __func__, CAS_READ_4(sc, CAS_RX_CONF), 2095 CAS_READ_4(sc, CAS_MAC_RX_STATUS), 2096 CAS_READ_4(sc, CAS_MAC_RX_CONF)); 2097 CTR4(KTR_CAS, 2098 "%s: CAS_TX_CONF %x CAS_MAC_TX_STATUS %x CAS_MAC_TX_CONF %x", 2099 __func__, CAS_READ_4(sc, CAS_TX_CONF), 2100 CAS_READ_4(sc, CAS_MAC_TX_STATUS), 2101 CAS_READ_4(sc, CAS_MAC_TX_CONF)); 2102 #endif 2103 2104 if (sc->sc_wdog_timer == 0 || --sc->sc_wdog_timer != 0) 2105 return; 2106 2107 if ((sc->sc_flags & CAS_LINK) != 0) 2108 device_printf(sc->sc_dev, "device timeout\n"); 2109 else if (bootverbose) 2110 device_printf(sc->sc_dev, "device timeout (no link)\n"); 2111 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 2112 2113 /* Try to get more packets going. */ 2114 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 2115 cas_init_locked(sc); 2116 if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) 2117 taskqueue_enqueue(sc->sc_tq, &sc->sc_tx_task); 2118 } 2119 2120 static void 2121 cas_mifinit(struct cas_softc *sc) 2122 { 2123 2124 /* Configure the MIF in frame mode. */ 2125 CAS_WRITE_4(sc, CAS_MIF_CONF, 2126 CAS_READ_4(sc, CAS_MIF_CONF) & ~CAS_MIF_CONF_BB_MODE); 2127 CAS_BARRIER(sc, CAS_MIF_CONF, 4, 2128 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 2129 } 2130 2131 /* 2132 * MII interface 2133 * 2134 * The MII interface supports at least three different operating modes: 2135 * 2136 * Bitbang mode is implemented using data, clock and output enable registers. 2137 * 2138 * Frame mode is implemented by loading a complete frame into the frame 2139 * register and polling the valid bit for completion. 2140 * 2141 * Polling mode uses the frame register but completion is indicated by 2142 * an interrupt. 2143 * 2144 */ 2145 static int 2146 cas_mii_readreg(device_t dev, int phy, int reg) 2147 { 2148 struct cas_softc *sc; 2149 int n; 2150 uint32_t v; 2151 2152 #ifdef CAS_DEBUG_PHY 2153 printf("%s: phy %d reg %d\n", __func__, phy, reg); 2154 #endif 2155 2156 sc = device_get_softc(dev); 2157 if ((sc->sc_flags & CAS_SERDES) != 0) { 2158 switch (reg) { 2159 case MII_BMCR: 2160 reg = CAS_PCS_CTRL; 2161 break; 2162 case MII_BMSR: 2163 reg = CAS_PCS_STATUS; 2164 break; 2165 case MII_PHYIDR1: 2166 case MII_PHYIDR2: 2167 return (0); 2168 case MII_ANAR: 2169 reg = CAS_PCS_ANAR; 2170 break; 2171 case MII_ANLPAR: 2172 reg = CAS_PCS_ANLPAR; 2173 break; 2174 case MII_EXTSR: 2175 return (EXTSR_1000XFDX | EXTSR_1000XHDX); 2176 default: 2177 device_printf(sc->sc_dev, 2178 "%s: unhandled register %d\n", __func__, reg); 2179 return (0); 2180 } 2181 return (CAS_READ_4(sc, reg)); 2182 } 2183 2184 /* Construct the frame command. */ 2185 v = CAS_MIF_FRAME_READ | 2186 (phy << CAS_MIF_FRAME_PHY_SHFT) | 2187 (reg << CAS_MIF_FRAME_REG_SHFT); 2188 2189 CAS_WRITE_4(sc, CAS_MIF_FRAME, v); 2190 CAS_BARRIER(sc, CAS_MIF_FRAME, 4, 2191 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 2192 for (n = 0; n < 100; n++) { 2193 DELAY(1); 2194 v = CAS_READ_4(sc, CAS_MIF_FRAME); 2195 if (v & CAS_MIF_FRAME_TA_LSB) 2196 return (v & CAS_MIF_FRAME_DATA); 2197 } 2198 2199 device_printf(sc->sc_dev, "%s: timed out\n", __func__); 2200 return (0); 2201 } 2202 2203 static int 2204 cas_mii_writereg(device_t dev, int phy, int reg, int val) 2205 { 2206 struct cas_softc *sc; 2207 int n; 2208 uint32_t v; 2209 2210 #ifdef CAS_DEBUG_PHY 2211 printf("%s: phy %d reg %d val %x\n", phy, reg, val, __func__); 2212 #endif 2213 2214 sc = device_get_softc(dev); 2215 if ((sc->sc_flags & CAS_SERDES) != 0) { 2216 switch (reg) { 2217 case MII_BMSR: 2218 reg = CAS_PCS_STATUS; 2219 break; 2220 case MII_BMCR: 2221 reg = CAS_PCS_CTRL; 2222 if ((val & CAS_PCS_CTRL_RESET) == 0) 2223 break; 2224 CAS_WRITE_4(sc, CAS_PCS_CTRL, val); 2225 CAS_BARRIER(sc, CAS_PCS_CTRL, 4, 2226 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 2227 if (!cas_bitwait(sc, CAS_PCS_CTRL, 2228 CAS_PCS_CTRL_RESET, 0)) 2229 device_printf(sc->sc_dev, 2230 "cannot reset PCS\n"); 2231 /* FALLTHROUGH */ 2232 case MII_ANAR: 2233 CAS_WRITE_4(sc, CAS_PCS_CONF, 0); 2234 CAS_BARRIER(sc, CAS_PCS_CONF, 4, 2235 BUS_SPACE_BARRIER_WRITE); 2236 CAS_WRITE_4(sc, CAS_PCS_ANAR, val); 2237 CAS_BARRIER(sc, CAS_PCS_ANAR, 4, 2238 BUS_SPACE_BARRIER_WRITE); 2239 CAS_WRITE_4(sc, CAS_PCS_SERDES_CTRL, 2240 CAS_PCS_SERDES_CTRL_ESD); 2241 CAS_BARRIER(sc, CAS_PCS_CONF, 4, 2242 BUS_SPACE_BARRIER_WRITE); 2243 CAS_WRITE_4(sc, CAS_PCS_CONF, 2244 CAS_PCS_CONF_EN); 2245 CAS_BARRIER(sc, CAS_PCS_CONF, 4, 2246 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 2247 return (0); 2248 case MII_ANLPAR: 2249 reg = CAS_PCS_ANLPAR; 2250 break; 2251 default: 2252 device_printf(sc->sc_dev, 2253 "%s: unhandled register %d\n", __func__, reg); 2254 return (0); 2255 } 2256 CAS_WRITE_4(sc, reg, val); 2257 CAS_BARRIER(sc, reg, 4, 2258 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 2259 return (0); 2260 } 2261 2262 /* Construct the frame command. */ 2263 v = CAS_MIF_FRAME_WRITE | 2264 (phy << CAS_MIF_FRAME_PHY_SHFT) | 2265 (reg << CAS_MIF_FRAME_REG_SHFT) | 2266 (val & CAS_MIF_FRAME_DATA); 2267 2268 CAS_WRITE_4(sc, CAS_MIF_FRAME, v); 2269 CAS_BARRIER(sc, CAS_MIF_FRAME, 4, 2270 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 2271 for (n = 0; n < 100; n++) { 2272 DELAY(1); 2273 v = CAS_READ_4(sc, CAS_MIF_FRAME); 2274 if (v & CAS_MIF_FRAME_TA_LSB) 2275 return (1); 2276 } 2277 2278 device_printf(sc->sc_dev, "%s: timed out\n", __func__); 2279 return (0); 2280 } 2281 2282 static void 2283 cas_mii_statchg(device_t dev) 2284 { 2285 struct cas_softc *sc; 2286 struct ifnet *ifp; 2287 int gigabit; 2288 uint32_t rxcfg, txcfg, v; 2289 2290 sc = device_get_softc(dev); 2291 ifp = sc->sc_ifp; 2292 2293 CAS_LOCK_ASSERT(sc, MA_OWNED); 2294 2295 #ifdef CAS_DEBUG 2296 if ((ifp->if_flags & IFF_DEBUG) != 0) 2297 device_printf(sc->sc_dev, "%s: status changen", __func__); 2298 #endif 2299 2300 if ((sc->sc_mii->mii_media_status & IFM_ACTIVE) != 0 && 2301 IFM_SUBTYPE(sc->sc_mii->mii_media_active) != IFM_NONE) 2302 sc->sc_flags |= CAS_LINK; 2303 else 2304 sc->sc_flags &= ~CAS_LINK; 2305 2306 switch (IFM_SUBTYPE(sc->sc_mii->mii_media_active)) { 2307 case IFM_1000_SX: 2308 case IFM_1000_LX: 2309 case IFM_1000_CX: 2310 case IFM_1000_T: 2311 gigabit = 1; 2312 break; 2313 default: 2314 gigabit = 0; 2315 } 2316 2317 /* 2318 * The configuration done here corresponds to the steps F) and 2319 * G) and as far as enabling of RX and TX MAC goes also step H) 2320 * of the initialization sequence outlined in section 11.2.1 of 2321 * the Cassini+ ASIC Specification. 2322 */ 2323 2324 rxcfg = sc->sc_mac_rxcfg; 2325 rxcfg &= ~CAS_MAC_RX_CONF_CARR; 2326 txcfg = CAS_MAC_TX_CONF_EN_IPG0 | CAS_MAC_TX_CONF_NGU | 2327 CAS_MAC_TX_CONF_NGUL; 2328 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & IFM_FDX) != 0) 2329 txcfg |= CAS_MAC_TX_CONF_ICARR | CAS_MAC_TX_CONF_ICOLLIS; 2330 else if (gigabit != 0) { 2331 rxcfg |= CAS_MAC_RX_CONF_CARR; 2332 txcfg |= CAS_MAC_TX_CONF_CARR; 2333 } 2334 (void)cas_disable_tx(sc); 2335 CAS_WRITE_4(sc, CAS_MAC_TX_CONF, txcfg); 2336 (void)cas_disable_rx(sc); 2337 CAS_WRITE_4(sc, CAS_MAC_RX_CONF, rxcfg); 2338 2339 v = CAS_READ_4(sc, CAS_MAC_CTRL_CONF) & 2340 ~(CAS_MAC_CTRL_CONF_TXP | CAS_MAC_CTRL_CONF_RXP); 2341 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & 2342 IFM_ETH_RXPAUSE) != 0) 2343 v |= CAS_MAC_CTRL_CONF_RXP; 2344 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & 2345 IFM_ETH_TXPAUSE) != 0) 2346 v |= CAS_MAC_CTRL_CONF_TXP; 2347 CAS_WRITE_4(sc, CAS_MAC_CTRL_CONF, v); 2348 2349 /* 2350 * All supported chips have a bug causing incorrect checksum 2351 * to be calculated when letting them strip the FCS in half- 2352 * duplex mode. In theory we could disable FCS stripping and 2353 * manually adjust the checksum accordingly. It seems to make 2354 * more sense to optimze for the common case and just disable 2355 * hardware checksumming in half-duplex mode though. 2356 */ 2357 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & IFM_FDX) == 0) { 2358 ifp->if_capenable &= ~IFCAP_HWCSUM; 2359 ifp->if_hwassist = 0; 2360 } else if ((sc->sc_flags & CAS_NO_CSUM) == 0) { 2361 ifp->if_capenable = ifp->if_capabilities; 2362 ifp->if_hwassist = CAS_CSUM_FEATURES; 2363 } 2364 2365 if (sc->sc_variant == CAS_SATURN) { 2366 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & IFM_FDX) == 0) 2367 /* silicon bug workaround */ 2368 CAS_WRITE_4(sc, CAS_MAC_PREAMBLE_LEN, 0x41); 2369 else 2370 CAS_WRITE_4(sc, CAS_MAC_PREAMBLE_LEN, 0x7); 2371 } 2372 2373 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & IFM_FDX) == 0 && 2374 gigabit != 0) 2375 CAS_WRITE_4(sc, CAS_MAC_SLOT_TIME, 2376 CAS_MAC_SLOT_TIME_CARR); 2377 else 2378 CAS_WRITE_4(sc, CAS_MAC_SLOT_TIME, 2379 CAS_MAC_SLOT_TIME_NORM); 2380 2381 /* XIF Configuration */ 2382 v = CAS_MAC_XIF_CONF_TX_OE | CAS_MAC_XIF_CONF_LNKLED; 2383 if ((sc->sc_flags & CAS_SERDES) == 0) { 2384 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & IFM_FDX) == 0) 2385 v |= CAS_MAC_XIF_CONF_NOECHO; 2386 v |= CAS_MAC_XIF_CONF_BUF_OE; 2387 } 2388 if (gigabit != 0) 2389 v |= CAS_MAC_XIF_CONF_GMII; 2390 if ((IFM_OPTIONS(sc->sc_mii->mii_media_active) & IFM_FDX) != 0) 2391 v |= CAS_MAC_XIF_CONF_FDXLED; 2392 CAS_WRITE_4(sc, CAS_MAC_XIF_CONF, v); 2393 2394 sc->sc_mac_rxcfg = rxcfg; 2395 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0 && 2396 (sc->sc_flags & CAS_LINK) != 0) { 2397 CAS_WRITE_4(sc, CAS_MAC_TX_CONF, 2398 txcfg | CAS_MAC_TX_CONF_EN); 2399 CAS_WRITE_4(sc, CAS_MAC_RX_CONF, 2400 rxcfg | CAS_MAC_RX_CONF_EN); 2401 } 2402 } 2403 2404 static int 2405 cas_mediachange(struct ifnet *ifp) 2406 { 2407 struct cas_softc *sc = ifp->if_softc; 2408 int error; 2409 2410 /* XXX add support for serial media. */ 2411 2412 CAS_LOCK(sc); 2413 error = mii_mediachg(sc->sc_mii); 2414 CAS_UNLOCK(sc); 2415 return (error); 2416 } 2417 2418 static void 2419 cas_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) 2420 { 2421 struct cas_softc *sc = ifp->if_softc; 2422 2423 CAS_LOCK(sc); 2424 if ((ifp->if_flags & IFF_UP) == 0) { 2425 CAS_UNLOCK(sc); 2426 return; 2427 } 2428 2429 mii_pollstat(sc->sc_mii); 2430 ifmr->ifm_active = sc->sc_mii->mii_media_active; 2431 ifmr->ifm_status = sc->sc_mii->mii_media_status; 2432 CAS_UNLOCK(sc); 2433 } 2434 2435 static int 2436 cas_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 2437 { 2438 struct cas_softc *sc = ifp->if_softc; 2439 struct ifreq *ifr = (struct ifreq *)data; 2440 int error; 2441 2442 error = 0; 2443 switch (cmd) { 2444 case SIOCSIFFLAGS: 2445 CAS_LOCK(sc); 2446 if ((ifp->if_flags & IFF_UP) != 0) { 2447 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0 && 2448 ((ifp->if_flags ^ sc->sc_ifflags) & 2449 (IFF_ALLMULTI | IFF_PROMISC)) != 0) 2450 cas_setladrf(sc); 2451 else 2452 cas_init_locked(sc); 2453 } else if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) 2454 cas_stop(ifp); 2455 sc->sc_ifflags = ifp->if_flags; 2456 CAS_UNLOCK(sc); 2457 break; 2458 case SIOCSIFCAP: 2459 CAS_LOCK(sc); 2460 if ((sc->sc_flags & CAS_NO_CSUM) != 0) { 2461 error = EINVAL; 2462 CAS_UNLOCK(sc); 2463 break; 2464 } 2465 ifp->if_capenable = ifr->ifr_reqcap; 2466 if ((ifp->if_capenable & IFCAP_TXCSUM) != 0) 2467 ifp->if_hwassist = CAS_CSUM_FEATURES; 2468 else 2469 ifp->if_hwassist = 0; 2470 CAS_UNLOCK(sc); 2471 break; 2472 case SIOCADDMULTI: 2473 case SIOCDELMULTI: 2474 CAS_LOCK(sc); 2475 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) 2476 cas_setladrf(sc); 2477 CAS_UNLOCK(sc); 2478 break; 2479 case SIOCSIFMTU: 2480 if ((ifr->ifr_mtu < ETHERMIN) || 2481 (ifr->ifr_mtu > ETHERMTU_JUMBO)) 2482 error = EINVAL; 2483 else 2484 ifp->if_mtu = ifr->ifr_mtu; 2485 break; 2486 case SIOCGIFMEDIA: 2487 case SIOCSIFMEDIA: 2488 error = ifmedia_ioctl(ifp, ifr, &sc->sc_mii->mii_media, cmd); 2489 break; 2490 default: 2491 error = ether_ioctl(ifp, cmd, data); 2492 break; 2493 } 2494 2495 return (error); 2496 } 2497 2498 static u_int 2499 cas_hash_maddr(void *arg, struct sockaddr_dl *sdl, u_int cnt) 2500 { 2501 uint32_t crc, *hash = arg; 2502 2503 crc = ether_crc32_le(LLADDR(sdl), ETHER_ADDR_LEN); 2504 /* We just want the 8 most significant bits. */ 2505 crc >>= 24; 2506 /* Set the corresponding bit in the filter. */ 2507 hash[crc >> 4] |= 1 << (15 - (crc & 15)); 2508 2509 return (1); 2510 } 2511 2512 static void 2513 cas_setladrf(struct cas_softc *sc) 2514 { 2515 struct ifnet *ifp = sc->sc_ifp; 2516 int i; 2517 uint32_t hash[16]; 2518 uint32_t v; 2519 2520 CAS_LOCK_ASSERT(sc, MA_OWNED); 2521 2522 /* 2523 * Turn off the RX MAC and the hash filter as required by the Sun 2524 * Cassini programming restrictions. 2525 */ 2526 v = sc->sc_mac_rxcfg & ~(CAS_MAC_RX_CONF_HFILTER | 2527 CAS_MAC_RX_CONF_EN); 2528 CAS_WRITE_4(sc, CAS_MAC_RX_CONF, v); 2529 CAS_BARRIER(sc, CAS_MAC_RX_CONF, 4, 2530 BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE); 2531 if (!cas_bitwait(sc, CAS_MAC_RX_CONF, CAS_MAC_RX_CONF_HFILTER | 2532 CAS_MAC_RX_CONF_EN, 0)) 2533 device_printf(sc->sc_dev, 2534 "cannot disable RX MAC or hash filter\n"); 2535 2536 v &= ~(CAS_MAC_RX_CONF_PROMISC | CAS_MAC_RX_CONF_PGRP); 2537 if ((ifp->if_flags & IFF_PROMISC) != 0) { 2538 v |= CAS_MAC_RX_CONF_PROMISC; 2539 goto chipit; 2540 } 2541 if ((ifp->if_flags & IFF_ALLMULTI) != 0) { 2542 v |= CAS_MAC_RX_CONF_PGRP; 2543 goto chipit; 2544 } 2545 2546 /* 2547 * Set up multicast address filter by passing all multicast 2548 * addresses through a crc generator, and then using the high 2549 * order 8 bits as an index into the 256 bit logical address 2550 * filter. The high order 4 bits selects the word, while the 2551 * other 4 bits select the bit within the word (where bit 0 2552 * is the MSB). 2553 */ 2554 2555 memset(hash, 0, sizeof(hash)); 2556 if_foreach_llmaddr(ifp, cas_hash_maddr, &hash); 2557 2558 v |= CAS_MAC_RX_CONF_HFILTER; 2559 2560 /* Now load the hash table into the chip (if we are using it). */ 2561 for (i = 0; i < 16; i++) 2562 CAS_WRITE_4(sc, 2563 CAS_MAC_HASH0 + i * (CAS_MAC_HASH1 - CAS_MAC_HASH0), 2564 hash[i]); 2565 2566 chipit: 2567 sc->sc_mac_rxcfg = v; 2568 CAS_WRITE_4(sc, CAS_MAC_RX_CONF, v | CAS_MAC_RX_CONF_EN); 2569 } 2570 2571 static int cas_pci_attach(device_t dev); 2572 static int cas_pci_detach(device_t dev); 2573 static int cas_pci_probe(device_t dev); 2574 static int cas_pci_resume(device_t dev); 2575 static int cas_pci_suspend(device_t dev); 2576 2577 static device_method_t cas_pci_methods[] = { 2578 /* Device interface */ 2579 DEVMETHOD(device_probe, cas_pci_probe), 2580 DEVMETHOD(device_attach, cas_pci_attach), 2581 DEVMETHOD(device_detach, cas_pci_detach), 2582 DEVMETHOD(device_suspend, cas_pci_suspend), 2583 DEVMETHOD(device_resume, cas_pci_resume), 2584 /* Use the suspend handler here, it is all that is required. */ 2585 DEVMETHOD(device_shutdown, cas_pci_suspend), 2586 2587 /* MII interface */ 2588 DEVMETHOD(miibus_readreg, cas_mii_readreg), 2589 DEVMETHOD(miibus_writereg, cas_mii_writereg), 2590 DEVMETHOD(miibus_statchg, cas_mii_statchg), 2591 2592 DEVMETHOD_END 2593 }; 2594 2595 static driver_t cas_pci_driver = { 2596 "cas", 2597 cas_pci_methods, 2598 sizeof(struct cas_softc) 2599 }; 2600 2601 static const struct cas_pci_dev { 2602 uint32_t cpd_devid; 2603 uint8_t cpd_revid; 2604 int cpd_variant; 2605 const char *cpd_desc; 2606 } cas_pci_devlist[] = { 2607 { 0x0035100b, 0x0, CAS_SATURN, "NS DP83065 Saturn Gigabit Ethernet" }, 2608 { 0xabba108e, 0x10, CAS_CASPLUS, "Sun Cassini+ Gigabit Ethernet" }, 2609 { 0xabba108e, 0x0, CAS_CAS, "Sun Cassini Gigabit Ethernet" }, 2610 { 0, 0, 0, NULL } 2611 }; 2612 2613 DRIVER_MODULE(cas, pci, cas_pci_driver, 0, 0); 2614 MODULE_PNP_INFO("W32:vendor/device", pci, cas, cas_pci_devlist, 2615 nitems(cas_pci_devlist) - 1); 2616 DRIVER_MODULE(miibus, cas, miibus_driver, 0, 0); 2617 MODULE_DEPEND(cas, pci, 1, 1, 1); 2618 2619 static int 2620 cas_pci_probe(device_t dev) 2621 { 2622 int i; 2623 2624 for (i = 0; cas_pci_devlist[i].cpd_desc != NULL; i++) { 2625 if (pci_get_devid(dev) == cas_pci_devlist[i].cpd_devid && 2626 pci_get_revid(dev) >= cas_pci_devlist[i].cpd_revid) { 2627 device_set_desc(dev, cas_pci_devlist[i].cpd_desc); 2628 return (BUS_PROBE_DEFAULT); 2629 } 2630 } 2631 2632 return (ENXIO); 2633 } 2634 2635 static struct resource_spec cas_pci_res_spec[] = { 2636 { SYS_RES_IRQ, 0, RF_SHAREABLE | RF_ACTIVE }, /* CAS_RES_INTR */ 2637 { SYS_RES_MEMORY, PCIR_BAR(0), RF_ACTIVE }, /* CAS_RES_MEM */ 2638 { -1, 0 } 2639 }; 2640 2641 #define CAS_LOCAL_MAC_ADDRESS "local-mac-address" 2642 #define CAS_PHY_INTERFACE "phy-interface" 2643 #define CAS_PHY_TYPE "phy-type" 2644 #define CAS_PHY_TYPE_PCS "pcs" 2645 2646 static int 2647 cas_pci_attach(device_t dev) 2648 { 2649 char buf[sizeof(CAS_LOCAL_MAC_ADDRESS)]; 2650 struct cas_softc *sc; 2651 int i; 2652 #if !defined(__powerpc__) 2653 u_char enaddr[4][ETHER_ADDR_LEN]; 2654 u_int j, k, lma, pcs[4], phy; 2655 #endif 2656 2657 sc = device_get_softc(dev); 2658 sc->sc_variant = CAS_UNKNOWN; 2659 for (i = 0; cas_pci_devlist[i].cpd_desc != NULL; i++) { 2660 if (pci_get_devid(dev) == cas_pci_devlist[i].cpd_devid && 2661 pci_get_revid(dev) >= cas_pci_devlist[i].cpd_revid) { 2662 sc->sc_variant = cas_pci_devlist[i].cpd_variant; 2663 break; 2664 } 2665 } 2666 if (sc->sc_variant == CAS_UNKNOWN) { 2667 device_printf(dev, "unknown adaptor\n"); 2668 return (ENXIO); 2669 } 2670 2671 /* PCI configuration */ 2672 pci_write_config(dev, PCIR_COMMAND, 2673 pci_read_config(dev, PCIR_COMMAND, 2) | PCIM_CMD_BUSMASTEREN | 2674 PCIM_CMD_MWRICEN | PCIM_CMD_PERRESPEN | PCIM_CMD_SERRESPEN, 2); 2675 2676 sc->sc_dev = dev; 2677 if (sc->sc_variant == CAS_CAS && pci_get_devid(dev) < 0x02) 2678 /* Hardware checksumming may hang TX. */ 2679 sc->sc_flags |= CAS_NO_CSUM; 2680 if (sc->sc_variant == CAS_CASPLUS || sc->sc_variant == CAS_SATURN) 2681 sc->sc_flags |= CAS_REG_PLUS; 2682 if (sc->sc_variant == CAS_CAS || 2683 (sc->sc_variant == CAS_CASPLUS && pci_get_revid(dev) < 0x11)) 2684 sc->sc_flags |= CAS_TABORT; 2685 if (bootverbose) 2686 device_printf(dev, "flags=0x%x\n", sc->sc_flags); 2687 2688 if (bus_alloc_resources(dev, cas_pci_res_spec, sc->sc_res)) { 2689 device_printf(dev, "failed to allocate resources\n"); 2690 bus_release_resources(dev, cas_pci_res_spec, sc->sc_res); 2691 return (ENXIO); 2692 } 2693 2694 CAS_LOCK_INIT(sc, device_get_nameunit(dev)); 2695 2696 #if defined(__powerpc__) 2697 OF_getetheraddr(dev, sc->sc_enaddr); 2698 if (OF_getprop(ofw_bus_get_node(dev), CAS_PHY_INTERFACE, buf, 2699 sizeof(buf)) > 0 || OF_getprop(ofw_bus_get_node(dev), 2700 CAS_PHY_TYPE, buf, sizeof(buf)) > 0) { 2701 buf[sizeof(buf) - 1] = '\0'; 2702 if (strcmp(buf, CAS_PHY_TYPE_PCS) == 0) 2703 sc->sc_flags |= CAS_SERDES; 2704 } 2705 #else 2706 /* 2707 * Dig out VPD (vital product data) and read the MAC address as well 2708 * as the PHY type. The VPD resides in the PCI Expansion ROM (PCI 2709 * FCode) and can't be accessed via the PCI capability pointer. 2710 * SUNW,pci-ce and SUNW,pci-qge use the Enhanced VPD format described 2711 * in the free US Patent 7149820. 2712 */ 2713 2714 #define PCI_ROMHDR_SIZE 0x1c 2715 #define PCI_ROMHDR_SIG 0x00 2716 #define PCI_ROMHDR_SIG_MAGIC 0xaa55 /* little endian */ 2717 #define PCI_ROMHDR_PTR_DATA 0x18 2718 #define PCI_ROM_SIZE 0x18 2719 #define PCI_ROM_SIG 0x00 2720 #define PCI_ROM_SIG_MAGIC 0x52494350 /* "PCIR", endian */ 2721 /* reversed */ 2722 #define PCI_ROM_VENDOR 0x04 2723 #define PCI_ROM_DEVICE 0x06 2724 #define PCI_ROM_PTR_VPD 0x08 2725 #define PCI_VPDRES_BYTE0 0x00 2726 #define PCI_VPDRES_ISLARGE(x) ((x) & 0x80) 2727 #define PCI_VPDRES_LARGE_NAME(x) ((x) & 0x7f) 2728 #define PCI_VPDRES_LARGE_LEN_LSB 0x01 2729 #define PCI_VPDRES_LARGE_LEN_MSB 0x02 2730 #define PCI_VPDRES_LARGE_SIZE 0x03 2731 #define PCI_VPDRES_TYPE_ID_STRING 0x02 /* large */ 2732 #define PCI_VPDRES_TYPE_VPD 0x10 /* large */ 2733 #define PCI_VPD_KEY0 0x00 2734 #define PCI_VPD_KEY1 0x01 2735 #define PCI_VPD_LEN 0x02 2736 #define PCI_VPD_SIZE 0x03 2737 2738 #define CAS_ROM_READ_1(sc, offs) \ 2739 CAS_READ_1((sc), CAS_PCI_ROM_OFFSET + (offs)) 2740 #define CAS_ROM_READ_2(sc, offs) \ 2741 CAS_READ_2((sc), CAS_PCI_ROM_OFFSET + (offs)) 2742 #define CAS_ROM_READ_4(sc, offs) \ 2743 CAS_READ_4((sc), CAS_PCI_ROM_OFFSET + (offs)) 2744 2745 lma = phy = 0; 2746 memset(enaddr, 0, sizeof(enaddr)); 2747 memset(pcs, 0, sizeof(pcs)); 2748 2749 /* Enable PCI Expansion ROM access. */ 2750 CAS_WRITE_4(sc, CAS_BIM_LDEV_OEN, 2751 CAS_BIM_LDEV_OEN_PAD | CAS_BIM_LDEV_OEN_PROM); 2752 2753 /* Read PCI Expansion ROM header. */ 2754 if (CAS_ROM_READ_2(sc, PCI_ROMHDR_SIG) != PCI_ROMHDR_SIG_MAGIC || 2755 (i = CAS_ROM_READ_2(sc, PCI_ROMHDR_PTR_DATA)) < 2756 PCI_ROMHDR_SIZE) { 2757 device_printf(dev, "unexpected PCI Expansion ROM header\n"); 2758 goto fail_prom; 2759 } 2760 2761 /* Read PCI Expansion ROM data. */ 2762 if (CAS_ROM_READ_4(sc, i + PCI_ROM_SIG) != PCI_ROM_SIG_MAGIC || 2763 CAS_ROM_READ_2(sc, i + PCI_ROM_VENDOR) != pci_get_vendor(dev) || 2764 CAS_ROM_READ_2(sc, i + PCI_ROM_DEVICE) != pci_get_device(dev) || 2765 (j = CAS_ROM_READ_2(sc, i + PCI_ROM_PTR_VPD)) < 2766 i + PCI_ROM_SIZE) { 2767 device_printf(dev, "unexpected PCI Expansion ROM data\n"); 2768 goto fail_prom; 2769 } 2770 2771 /* Read PCI VPD. */ 2772 next: 2773 if (PCI_VPDRES_ISLARGE(CAS_ROM_READ_1(sc, 2774 j + PCI_VPDRES_BYTE0)) == 0) { 2775 device_printf(dev, "no large PCI VPD\n"); 2776 goto fail_prom; 2777 } 2778 2779 i = (CAS_ROM_READ_1(sc, j + PCI_VPDRES_LARGE_LEN_MSB) << 8) | 2780 CAS_ROM_READ_1(sc, j + PCI_VPDRES_LARGE_LEN_LSB); 2781 switch (PCI_VPDRES_LARGE_NAME(CAS_ROM_READ_1(sc, 2782 j + PCI_VPDRES_BYTE0))) { 2783 case PCI_VPDRES_TYPE_ID_STRING: 2784 /* Skip identifier string. */ 2785 j += PCI_VPDRES_LARGE_SIZE + i; 2786 goto next; 2787 case PCI_VPDRES_TYPE_VPD: 2788 for (j += PCI_VPDRES_LARGE_SIZE; i > 0; 2789 i -= PCI_VPD_SIZE + CAS_ROM_READ_1(sc, j + PCI_VPD_LEN), 2790 j += PCI_VPD_SIZE + CAS_ROM_READ_1(sc, j + PCI_VPD_LEN)) { 2791 if (CAS_ROM_READ_1(sc, j + PCI_VPD_KEY0) != 'Z') 2792 /* no Enhanced VPD */ 2793 continue; 2794 if (CAS_ROM_READ_1(sc, j + PCI_VPD_SIZE) != 'I') 2795 /* no instance property */ 2796 continue; 2797 if (CAS_ROM_READ_1(sc, j + PCI_VPD_SIZE + 3) == 'B') { 2798 /* byte array */ 2799 if (CAS_ROM_READ_1(sc, 2800 j + PCI_VPD_SIZE + 4) != ETHER_ADDR_LEN) 2801 continue; 2802 bus_read_region_1(sc->sc_res[CAS_RES_MEM], 2803 CAS_PCI_ROM_OFFSET + j + PCI_VPD_SIZE + 5, 2804 buf, sizeof(buf)); 2805 buf[sizeof(buf) - 1] = '\0'; 2806 if (strcmp(buf, CAS_LOCAL_MAC_ADDRESS) != 0) 2807 continue; 2808 bus_read_region_1(sc->sc_res[CAS_RES_MEM], 2809 CAS_PCI_ROM_OFFSET + j + PCI_VPD_SIZE + 2810 5 + sizeof(CAS_LOCAL_MAC_ADDRESS), 2811 enaddr[lma], sizeof(enaddr[lma])); 2812 lma++; 2813 if (lma == 4 && phy == 4) 2814 break; 2815 } else if (CAS_ROM_READ_1(sc, j + PCI_VPD_SIZE + 3) == 2816 'S') { 2817 /* string */ 2818 if (CAS_ROM_READ_1(sc, 2819 j + PCI_VPD_SIZE + 4) != 2820 sizeof(CAS_PHY_TYPE_PCS)) 2821 continue; 2822 bus_read_region_1(sc->sc_res[CAS_RES_MEM], 2823 CAS_PCI_ROM_OFFSET + j + PCI_VPD_SIZE + 5, 2824 buf, sizeof(buf)); 2825 buf[sizeof(buf) - 1] = '\0'; 2826 if (strcmp(buf, CAS_PHY_INTERFACE) == 0) 2827 k = sizeof(CAS_PHY_INTERFACE); 2828 else if (strcmp(buf, CAS_PHY_TYPE) == 0) 2829 k = sizeof(CAS_PHY_TYPE); 2830 else 2831 continue; 2832 bus_read_region_1(sc->sc_res[CAS_RES_MEM], 2833 CAS_PCI_ROM_OFFSET + j + PCI_VPD_SIZE + 2834 5 + k, buf, sizeof(buf)); 2835 buf[sizeof(buf) - 1] = '\0'; 2836 if (strcmp(buf, CAS_PHY_TYPE_PCS) == 0) 2837 pcs[phy] = 1; 2838 phy++; 2839 if (lma == 4 && phy == 4) 2840 break; 2841 } 2842 } 2843 break; 2844 default: 2845 device_printf(dev, "unexpected PCI VPD\n"); 2846 goto fail_prom; 2847 } 2848 2849 fail_prom: 2850 CAS_WRITE_4(sc, CAS_BIM_LDEV_OEN, 0); 2851 2852 if (lma == 0) { 2853 device_printf(dev, "could not determine Ethernet address\n"); 2854 goto fail; 2855 } 2856 i = 0; 2857 if (lma > 1 && pci_get_slot(dev) < nitems(enaddr)) 2858 i = pci_get_slot(dev); 2859 memcpy(sc->sc_enaddr, enaddr[i], ETHER_ADDR_LEN); 2860 2861 if (phy == 0) { 2862 device_printf(dev, "could not determine PHY type\n"); 2863 goto fail; 2864 } 2865 i = 0; 2866 if (phy > 1 && pci_get_slot(dev) < nitems(pcs)) 2867 i = pci_get_slot(dev); 2868 if (pcs[i] != 0) 2869 sc->sc_flags |= CAS_SERDES; 2870 #endif 2871 2872 if (cas_attach(sc) != 0) { 2873 device_printf(dev, "could not be attached\n"); 2874 goto fail; 2875 } 2876 2877 if (bus_setup_intr(dev, sc->sc_res[CAS_RES_INTR], INTR_TYPE_NET | 2878 INTR_MPSAFE, cas_intr, NULL, sc, &sc->sc_ih) != 0) { 2879 device_printf(dev, "failed to set up interrupt\n"); 2880 cas_detach(sc); 2881 goto fail; 2882 } 2883 return (0); 2884 2885 fail: 2886 CAS_LOCK_DESTROY(sc); 2887 bus_release_resources(dev, cas_pci_res_spec, sc->sc_res); 2888 return (ENXIO); 2889 } 2890 2891 static int 2892 cas_pci_detach(device_t dev) 2893 { 2894 struct cas_softc *sc; 2895 2896 sc = device_get_softc(dev); 2897 bus_teardown_intr(dev, sc->sc_res[CAS_RES_INTR], sc->sc_ih); 2898 cas_detach(sc); 2899 CAS_LOCK_DESTROY(sc); 2900 bus_release_resources(dev, cas_pci_res_spec, sc->sc_res); 2901 return (0); 2902 } 2903 2904 static int 2905 cas_pci_suspend(device_t dev) 2906 { 2907 2908 cas_suspend(device_get_softc(dev)); 2909 return (0); 2910 } 2911 2912 static int 2913 cas_pci_resume(device_t dev) 2914 { 2915 2916 cas_resume(device_get_softc(dev)); 2917 return (0); 2918 }
Cache object: 8a3b984e759f01d531e034b387dbc421
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