1 /*- 2 * Copyright (c) 2011, Bryan Venteicher <bryanv@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 /* Driver for VirtIO network devices. */ 28 29 #include <sys/cdefs.h> 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/kernel.h> 34 #include <sys/sockio.h> 35 #include <sys/mbuf.h> 36 #include <sys/malloc.h> 37 #include <sys/module.h> 38 #include <sys/socket.h> 39 #include <sys/sysctl.h> 40 #include <sys/taskqueue.h> 41 #include <sys/random.h> 42 #include <sys/sglist.h> 43 #include <sys/serialize.h> 44 #include <sys/bus.h> 45 #include <sys/rman.h> 46 47 #include <machine/limits.h> 48 49 #include <net/ethernet.h> 50 #include <net/if.h> 51 #include <net/if_arp.h> 52 #include <net/if_dl.h> 53 #include <net/if_types.h> 54 #include <net/if_media.h> 55 #include <net/vlan/if_vlan_var.h> 56 #include <net/vlan/if_vlan_ether.h> 57 #include <net/ifq_var.h> 58 59 #include <net/bpf.h> 60 61 #include <netinet/in_systm.h> 62 #include <netinet/in.h> 63 #include <netinet/ip.h> 64 #include <netinet/ip6.h> 65 #include <netinet/udp.h> 66 #include <netinet/tcp.h> 67 68 #include <dev/virtual/virtio/virtio/virtio.h> 69 #include <dev/virtual/virtio/virtio/virtqueue.h> 70 #include <dev/virtual/virtio/net/virtio_net.h> 71 #include <dev/virtual/virtio/net/if_vtnetvar.h> 72 73 #include "virtio_if.h" 74 75 MALLOC_DEFINE(M_VTNET, "VTNET_TX", "Outgoing VTNET TX frame header"); 76 77 static int vtnet_probe(device_t); 78 static int vtnet_attach(device_t); 79 static int vtnet_detach(device_t); 80 static int vtnet_suspend(device_t); 81 static int vtnet_resume(device_t); 82 static int vtnet_shutdown(device_t); 83 static int vtnet_config_change(device_t); 84 85 static void vtnet_negotiate_features(struct vtnet_softc *); 86 static int vtnet_alloc_virtqueues(struct vtnet_softc *); 87 static void vtnet_get_hwaddr(struct vtnet_softc *); 88 static void vtnet_set_hwaddr(struct vtnet_softc *); 89 static int vtnet_is_link_up(struct vtnet_softc *); 90 static void vtnet_update_link_status(struct vtnet_softc *); 91 #if 0 92 static void vtnet_watchdog(struct vtnet_softc *); 93 #endif 94 static void vtnet_config_change_task(void *, int); 95 static int vtnet_setup_interface(struct vtnet_softc *); 96 static int vtnet_change_mtu(struct vtnet_softc *, int); 97 static int vtnet_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *); 98 99 static int vtnet_init_rx_vq(struct vtnet_softc *); 100 static void vtnet_free_rx_mbufs(struct vtnet_softc *); 101 static void vtnet_free_tx_mbufs(struct vtnet_softc *); 102 static void vtnet_free_ctrl_vq(struct vtnet_softc *); 103 104 static struct mbuf * vtnet_alloc_rxbuf(struct vtnet_softc *, int, 105 struct mbuf **); 106 static int vtnet_replace_rxbuf(struct vtnet_softc *, 107 struct mbuf *, int); 108 static int vtnet_newbuf(struct vtnet_softc *); 109 static void vtnet_discard_merged_rxbuf(struct vtnet_softc *, int); 110 static void vtnet_discard_rxbuf(struct vtnet_softc *, struct mbuf *); 111 static int vtnet_enqueue_rxbuf(struct vtnet_softc *, struct mbuf *); 112 static void vtnet_vlan_tag_remove(struct mbuf *); 113 static int vtnet_rx_csum(struct vtnet_softc *, struct mbuf *, 114 struct virtio_net_hdr *); 115 static int vtnet_rxeof_merged(struct vtnet_softc *, struct mbuf *, int); 116 static int vtnet_rxeof(struct vtnet_softc *, int, int *); 117 static void vtnet_rx_intr_task(void *); 118 static int vtnet_rx_vq_intr(void *); 119 120 static void vtnet_enqueue_txhdr(struct vtnet_softc *, 121 struct vtnet_tx_header *); 122 static void vtnet_txeof(struct vtnet_softc *); 123 static struct mbuf * vtnet_tx_offload(struct vtnet_softc *, struct mbuf *, 124 struct virtio_net_hdr *); 125 static int vtnet_enqueue_txbuf(struct vtnet_softc *, struct mbuf **, 126 struct vtnet_tx_header *); 127 static int vtnet_encap(struct vtnet_softc *, struct mbuf **); 128 static void vtnet_start_locked(struct ifnet *, struct ifaltq_subque *); 129 static void vtnet_start(struct ifnet *, struct ifaltq_subque *); 130 static void vtnet_tick(void *); 131 static void vtnet_tx_intr_task(void *); 132 static int vtnet_tx_vq_intr(void *); 133 134 static void vtnet_stop(struct vtnet_softc *); 135 static int vtnet_virtio_reinit(struct vtnet_softc *); 136 static void vtnet_init_locked(struct vtnet_softc *); 137 static void vtnet_init(void *); 138 139 static void vtnet_exec_ctrl_cmd(struct vtnet_softc *, void *, 140 struct sglist *, int, int); 141 142 static int vtnet_ctrl_mac_cmd(struct vtnet_softc *, uint8_t *); 143 static int vtnet_ctrl_rx_cmd(struct vtnet_softc *, int, int); 144 static int vtnet_set_promisc(struct vtnet_softc *, int); 145 static int vtnet_set_allmulti(struct vtnet_softc *, int); 146 static void vtnet_rx_filter(struct vtnet_softc *sc); 147 static void vtnet_rx_filter_mac(struct vtnet_softc *); 148 149 static int vtnet_exec_vlan_filter(struct vtnet_softc *, int, uint16_t); 150 static void vtnet_rx_filter_vlan(struct vtnet_softc *); 151 static void vtnet_update_vlan_filter(struct vtnet_softc *, int, uint16_t); 152 static void vtnet_register_vlan(void *, struct ifnet *, uint16_t); 153 static void vtnet_unregister_vlan(void *, struct ifnet *, uint16_t); 154 155 static int vtnet_ifmedia_upd(struct ifnet *); 156 static void vtnet_ifmedia_sts(struct ifnet *, struct ifmediareq *); 157 158 static void vtnet_add_statistics(struct vtnet_softc *); 159 160 static int vtnet_enable_rx_intr(struct vtnet_softc *); 161 static int vtnet_enable_tx_intr(struct vtnet_softc *); 162 static void vtnet_disable_rx_intr(struct vtnet_softc *); 163 static void vtnet_disable_tx_intr(struct vtnet_softc *); 164 165 /* Tunables. */ 166 static int vtnet_csum_disable = 0; 167 TUNABLE_INT("hw.vtnet.csum_disable", &vtnet_csum_disable); 168 static int vtnet_tso_disable = 1; 169 TUNABLE_INT("hw.vtnet.tso_disable", &vtnet_tso_disable); 170 static int vtnet_lro_disable = 0; 171 TUNABLE_INT("hw.vtnet.lro_disable", &vtnet_lro_disable); 172 173 /* 174 * Reducing the number of transmit completed interrupts can 175 * improve performance. To do so, the define below keeps the 176 * Tx vq interrupt disabled and adds calls to vtnet_txeof() 177 * in the start and watchdog paths. The price to pay for this 178 * is the m_free'ing of transmitted mbufs may be delayed until 179 * the watchdog fires. 180 */ 181 #define VTNET_TX_INTR_MODERATION 182 183 static struct virtio_feature_desc vtnet_feature_desc[] = { 184 { VIRTIO_NET_F_CSUM, "TxChecksum" }, 185 { VIRTIO_NET_F_GUEST_CSUM, "RxChecksum" }, 186 { VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, "DynOffload" }, 187 { VIRTIO_NET_F_MAC, "MacAddress" }, 188 { VIRTIO_NET_F_GSO, "TxAllGSO" }, 189 { VIRTIO_NET_F_GUEST_TSO4, "RxTSOv4" }, 190 { VIRTIO_NET_F_GUEST_TSO6, "RxTSOv6" }, 191 { VIRTIO_NET_F_GUEST_ECN, "RxECN" }, 192 { VIRTIO_NET_F_GUEST_UFO, "RxUFO" }, 193 { VIRTIO_NET_F_HOST_TSO4, "TxTSOv4" }, 194 { VIRTIO_NET_F_HOST_TSO6, "TxTSOv6" }, 195 { VIRTIO_NET_F_HOST_ECN, "TxTSOECN" }, 196 { VIRTIO_NET_F_HOST_UFO, "TxUFO" }, 197 { VIRTIO_NET_F_MRG_RXBUF, "MrgRxBuf" }, 198 { VIRTIO_NET_F_STATUS, "Status" }, 199 { VIRTIO_NET_F_CTRL_VQ, "ControlVq" }, 200 { VIRTIO_NET_F_CTRL_RX, "RxMode" }, 201 { VIRTIO_NET_F_CTRL_VLAN, "VLanFilter" }, 202 { VIRTIO_NET_F_CTRL_RX_EXTRA, "RxModeExtra" }, 203 { VIRTIO_NET_F_GUEST_ANNOUNCE, "GuestAnnounce" }, 204 { VIRTIO_NET_F_MQ, "RFS" }, 205 { VIRTIO_NET_F_CTRL_MAC_ADDR, "SetMacAddress" }, 206 { 0, NULL } 207 }; 208 209 static device_method_t vtnet_methods[] = { 210 /* Device methods. */ 211 DEVMETHOD(device_probe, vtnet_probe), 212 DEVMETHOD(device_attach, vtnet_attach), 213 DEVMETHOD(device_detach, vtnet_detach), 214 DEVMETHOD(device_suspend, vtnet_suspend), 215 DEVMETHOD(device_resume, vtnet_resume), 216 DEVMETHOD(device_shutdown, vtnet_shutdown), 217 218 /* VirtIO methods. */ 219 DEVMETHOD(virtio_config_change, vtnet_config_change), 220 221 DEVMETHOD_END 222 }; 223 224 static driver_t vtnet_driver = { 225 "vtnet", 226 vtnet_methods, 227 sizeof(struct vtnet_softc) 228 }; 229 230 static devclass_t vtnet_devclass; 231 232 DRIVER_MODULE(vtnet, virtio_pci, vtnet_driver, vtnet_devclass, NULL, NULL); 233 MODULE_VERSION(vtnet, 1); 234 MODULE_DEPEND(vtnet, virtio, 1, 1, 1); 235 236 static int 237 vtnet_probe(device_t dev) 238 { 239 if (virtio_get_device_type(dev) != VIRTIO_ID_NETWORK) 240 return (ENXIO); 241 242 device_set_desc(dev, "VirtIO Networking Adapter"); 243 244 return (BUS_PROBE_DEFAULT); 245 } 246 247 static int 248 vtnet_attach(device_t dev) 249 { 250 struct vtnet_softc *sc; 251 int error; 252 253 sc = device_get_softc(dev); 254 sc->vtnet_dev = dev; 255 256 lwkt_serialize_init(&sc->vtnet_slz); 257 callout_init(&sc->vtnet_tick_ch); 258 259 ifmedia_init(&sc->vtnet_media, IFM_IMASK, vtnet_ifmedia_upd, 260 vtnet_ifmedia_sts); 261 ifmedia_add(&sc->vtnet_media, VTNET_MEDIATYPE, 0, NULL); 262 ifmedia_set(&sc->vtnet_media, VTNET_MEDIATYPE); 263 264 vtnet_add_statistics(sc); 265 SLIST_INIT(&sc->vtnet_txhdr_free); 266 267 /* Register our feature descriptions. */ 268 virtio_set_feature_desc(dev, vtnet_feature_desc); 269 vtnet_negotiate_features(sc); 270 271 if (virtio_with_feature(dev, VIRTIO_RING_F_INDIRECT_DESC)) 272 sc->vtnet_flags |= VTNET_FLAG_INDIRECT; 273 274 if (virtio_with_feature(dev, VIRTIO_NET_F_MAC)) { 275 /* This feature should always be negotiated. */ 276 sc->vtnet_flags |= VTNET_FLAG_MAC; 277 } 278 279 if (virtio_with_feature(dev, VIRTIO_NET_F_MRG_RXBUF)) { 280 sc->vtnet_flags |= VTNET_FLAG_MRG_RXBUFS; 281 sc->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf); 282 } else { 283 sc->vtnet_hdr_size = sizeof(struct virtio_net_hdr); 284 } 285 286 sc->vtnet_rx_mbuf_size = MCLBYTES; 287 sc->vtnet_rx_mbuf_count = VTNET_NEEDED_RX_MBUFS(sc); 288 289 if (virtio_with_feature(dev, VIRTIO_NET_F_CTRL_VQ)) { 290 sc->vtnet_flags |= VTNET_FLAG_CTRL_VQ; 291 292 if (virtio_with_feature(dev, VIRTIO_NET_F_CTRL_RX)) 293 sc->vtnet_flags |= VTNET_FLAG_CTRL_RX; 294 if (virtio_with_feature(dev, VIRTIO_NET_F_CTRL_VLAN)) 295 sc->vtnet_flags |= VTNET_FLAG_VLAN_FILTER; 296 if (virtio_with_feature(dev, VIRTIO_NET_F_CTRL_MAC_ADDR) && 297 virtio_with_feature(dev, VIRTIO_NET_F_CTRL_RX)) 298 sc->vtnet_flags |= VTNET_FLAG_CTRL_MAC; 299 } 300 301 /* Read (or generate) the MAC address for the adapter. */ 302 vtnet_get_hwaddr(sc); 303 304 error = vtnet_alloc_virtqueues(sc); 305 if (error) { 306 device_printf(dev, "cannot allocate virtqueues\n"); 307 goto fail; 308 } 309 310 error = vtnet_setup_interface(sc); 311 if (error) { 312 device_printf(dev, "cannot setup interface\n"); 313 goto fail; 314 } 315 316 TASK_INIT(&sc->vtnet_cfgchg_task, 0, vtnet_config_change_task, sc); 317 318 error = virtio_setup_intr(dev, &sc->vtnet_slz); 319 if (error) { 320 device_printf(dev, "cannot setup virtqueue interrupts\n"); 321 ether_ifdetach(sc->vtnet_ifp); 322 goto fail; 323 } 324 325 /* 326 * Device defaults to promiscuous mode for backwards 327 * compatibility. Turn it off if possible. 328 */ 329 if (sc->vtnet_flags & VTNET_FLAG_CTRL_RX) { 330 lwkt_serialize_enter(&sc->vtnet_slz); 331 if (vtnet_set_promisc(sc, 0) != 0) { 332 sc->vtnet_ifp->if_flags |= IFF_PROMISC; 333 device_printf(dev, 334 "cannot disable promiscuous mode\n"); 335 } 336 lwkt_serialize_exit(&sc->vtnet_slz); 337 } else 338 sc->vtnet_ifp->if_flags |= IFF_PROMISC; 339 340 fail: 341 if (error) 342 vtnet_detach(dev); 343 344 return (error); 345 } 346 347 static int 348 vtnet_detach(device_t dev) 349 { 350 struct vtnet_softc *sc; 351 struct ifnet *ifp; 352 353 sc = device_get_softc(dev); 354 ifp = sc->vtnet_ifp; 355 356 if (device_is_attached(dev)) { 357 lwkt_serialize_enter(&sc->vtnet_slz); 358 vtnet_stop(sc); 359 lwkt_serialize_exit(&sc->vtnet_slz); 360 361 callout_stop(&sc->vtnet_tick_ch); 362 taskqueue_drain(taskqueue_swi, &sc->vtnet_cfgchg_task); 363 364 ether_ifdetach(ifp); 365 } 366 367 if (sc->vtnet_vlan_attach != NULL) { 368 EVENTHANDLER_DEREGISTER(vlan_config, sc->vtnet_vlan_attach); 369 sc->vtnet_vlan_attach = NULL; 370 } 371 if (sc->vtnet_vlan_detach != NULL) { 372 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vtnet_vlan_detach); 373 sc->vtnet_vlan_detach = NULL; 374 } 375 376 if (ifp) { 377 if_free(ifp); 378 sc->vtnet_ifp = NULL; 379 } 380 381 if (sc->vtnet_rx_vq != NULL) 382 vtnet_free_rx_mbufs(sc); 383 if (sc->vtnet_tx_vq != NULL) 384 vtnet_free_tx_mbufs(sc); 385 if (sc->vtnet_ctrl_vq != NULL) 386 vtnet_free_ctrl_vq(sc); 387 388 if (sc->vtnet_txhdrarea != NULL) { 389 contigfree(sc->vtnet_txhdrarea, 390 sc->vtnet_txhdrcount * sizeof(struct vtnet_tx_header), 391 M_VTNET); 392 sc->vtnet_txhdrarea = NULL; 393 } 394 SLIST_INIT(&sc->vtnet_txhdr_free); 395 if (sc->vtnet_macfilter != NULL) { 396 contigfree(sc->vtnet_macfilter, 397 sizeof(struct vtnet_mac_filter), M_DEVBUF); 398 sc->vtnet_macfilter = NULL; 399 } 400 401 ifmedia_removeall(&sc->vtnet_media); 402 403 return (0); 404 } 405 406 static int 407 vtnet_suspend(device_t dev) 408 { 409 struct vtnet_softc *sc; 410 411 sc = device_get_softc(dev); 412 413 lwkt_serialize_enter(&sc->vtnet_slz); 414 vtnet_stop(sc); 415 sc->vtnet_flags |= VTNET_FLAG_SUSPENDED; 416 lwkt_serialize_exit(&sc->vtnet_slz); 417 418 return (0); 419 } 420 421 static int 422 vtnet_resume(device_t dev) 423 { 424 struct vtnet_softc *sc; 425 struct ifnet *ifp; 426 427 sc = device_get_softc(dev); 428 ifp = sc->vtnet_ifp; 429 430 lwkt_serialize_enter(&sc->vtnet_slz); 431 if (ifp->if_flags & IFF_UP) 432 vtnet_init_locked(sc); 433 sc->vtnet_flags &= ~VTNET_FLAG_SUSPENDED; 434 lwkt_serialize_exit(&sc->vtnet_slz); 435 436 return (0); 437 } 438 439 static int 440 vtnet_shutdown(device_t dev) 441 { 442 443 /* 444 * Suspend already does all of what we need to 445 * do here; we just never expect to be resumed. 446 */ 447 return (vtnet_suspend(dev)); 448 } 449 450 static int 451 vtnet_config_change(device_t dev) 452 { 453 struct vtnet_softc *sc; 454 455 sc = device_get_softc(dev); 456 457 taskqueue_enqueue(taskqueue_thread[mycpuid], &sc->vtnet_cfgchg_task); 458 459 return (1); 460 } 461 462 static void 463 vtnet_negotiate_features(struct vtnet_softc *sc) 464 { 465 device_t dev; 466 uint64_t mask, features; 467 468 dev = sc->vtnet_dev; 469 mask = 0; 470 471 if (vtnet_csum_disable) 472 mask |= VIRTIO_NET_F_CSUM | VIRTIO_NET_F_GUEST_CSUM; 473 474 /* 475 * TSO and LRO are only available when their corresponding checksum 476 * offload feature is also negotiated. 477 */ 478 479 if (vtnet_csum_disable || vtnet_tso_disable) 480 mask |= VIRTIO_NET_F_HOST_TSO4 | VIRTIO_NET_F_HOST_TSO6 | 481 VIRTIO_NET_F_HOST_ECN; 482 483 if (vtnet_csum_disable || vtnet_lro_disable) 484 mask |= VTNET_LRO_FEATURES; 485 486 features = VTNET_FEATURES & ~mask; 487 features |= VIRTIO_F_NOTIFY_ON_EMPTY; 488 features |= VIRTIO_F_ANY_LAYOUT; 489 sc->vtnet_features = virtio_negotiate_features(dev, features); 490 491 if (virtio_with_feature(dev, VTNET_LRO_FEATURES) && 492 virtio_with_feature(dev, VIRTIO_NET_F_MRG_RXBUF) == 0) { 493 /* 494 * LRO without mergeable buffers requires special care. This 495 * is not ideal because every receive buffer must be large 496 * enough to hold the maximum TCP packet, the Ethernet header, 497 * and the header. This requires up to 34 descriptors with 498 * MCLBYTES clusters. If we do not have indirect descriptors, 499 * LRO is disabled since the virtqueue will not contain very 500 * many receive buffers. 501 */ 502 if (!virtio_with_feature(dev, VIRTIO_RING_F_INDIRECT_DESC)) { 503 device_printf(dev, 504 "LRO disabled due to both mergeable buffers and " 505 "indirect descriptors not negotiated\n"); 506 507 features &= ~VTNET_LRO_FEATURES; 508 sc->vtnet_features = 509 virtio_negotiate_features(dev, features); 510 } else 511 sc->vtnet_flags |= VTNET_FLAG_LRO_NOMRG; 512 } 513 } 514 515 static int 516 vtnet_alloc_virtqueues(struct vtnet_softc *sc) 517 { 518 device_t dev; 519 struct vq_alloc_info vq_info[3]; 520 int nvqs; 521 522 dev = sc->vtnet_dev; 523 nvqs = 2; 524 525 /* 526 * Indirect descriptors are not needed for the Rx 527 * virtqueue when mergeable buffers are negotiated. 528 * The header is placed inline with the data, not 529 * in a separate descriptor, and mbuf clusters are 530 * always physically contiguous. 531 */ 532 if ((sc->vtnet_flags & VTNET_FLAG_MRG_RXBUFS) == 0) { 533 sc->vtnet_rx_nsegs = (sc->vtnet_flags & VTNET_FLAG_LRO_NOMRG) ? 534 VTNET_MAX_RX_SEGS : VTNET_MIN_RX_SEGS; 535 } else 536 sc->vtnet_rx_nsegs = VTNET_MRG_RX_SEGS; 537 538 if (virtio_with_feature(dev, VIRTIO_NET_F_HOST_TSO4) || 539 virtio_with_feature(dev, VIRTIO_NET_F_HOST_TSO6)) 540 sc->vtnet_tx_nsegs = VTNET_MAX_TX_SEGS; 541 else 542 sc->vtnet_tx_nsegs = VTNET_MIN_TX_SEGS; 543 544 VQ_ALLOC_INFO_INIT(&vq_info[0], sc->vtnet_rx_nsegs, 545 vtnet_rx_vq_intr, sc, &sc->vtnet_rx_vq, 546 "%s receive", device_get_nameunit(dev)); 547 548 VQ_ALLOC_INFO_INIT(&vq_info[1], sc->vtnet_tx_nsegs, 549 vtnet_tx_vq_intr, sc, &sc->vtnet_tx_vq, 550 "%s transmit", device_get_nameunit(dev)); 551 552 if (sc->vtnet_flags & VTNET_FLAG_CTRL_VQ) { 553 nvqs++; 554 555 VQ_ALLOC_INFO_INIT(&vq_info[2], 0, NULL, NULL, 556 &sc->vtnet_ctrl_vq, "%s control", 557 device_get_nameunit(dev)); 558 } 559 560 return (virtio_alloc_virtqueues(dev, 0, nvqs, vq_info)); 561 } 562 563 static int 564 vtnet_setup_interface(struct vtnet_softc *sc) 565 { 566 device_t dev; 567 struct ifnet *ifp; 568 int i; 569 570 dev = sc->vtnet_dev; 571 572 ifp = sc->vtnet_ifp = if_alloc(IFT_ETHER); 573 if (ifp == NULL) { 574 device_printf(dev, "cannot allocate ifnet structure\n"); 575 return (ENOSPC); 576 } 577 578 ifp->if_softc = sc; 579 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 580 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 581 ifp->if_init = vtnet_init; 582 ifp->if_start = vtnet_start; 583 ifp->if_ioctl = vtnet_ioctl; 584 585 sc->vtnet_rx_process_limit = virtqueue_size(sc->vtnet_rx_vq); 586 sc->vtnet_tx_size = virtqueue_size(sc->vtnet_tx_vq); 587 if (sc->vtnet_flags & VTNET_FLAG_INDIRECT) 588 sc->vtnet_txhdrcount = sc->vtnet_tx_size; 589 else 590 sc->vtnet_txhdrcount = (sc->vtnet_tx_size / 2) + 1; 591 sc->vtnet_txhdrarea = contigmalloc( 592 sc->vtnet_txhdrcount * sizeof(struct vtnet_tx_header), 593 M_VTNET, M_WAITOK, 0, BUS_SPACE_MAXADDR, 4, 0); 594 if (sc->vtnet_txhdrarea == NULL) { 595 device_printf(dev, "cannot contigmalloc the tx headers\n"); 596 return (ENOMEM); 597 } 598 for (i = 0; i < sc->vtnet_txhdrcount; i++) 599 vtnet_enqueue_txhdr(sc, &sc->vtnet_txhdrarea[i]); 600 sc->vtnet_macfilter = contigmalloc( 601 sizeof(struct vtnet_mac_filter), 602 M_DEVBUF, M_WAITOK, 0, BUS_SPACE_MAXADDR, 4, 0); 603 if (sc->vtnet_macfilter == NULL) { 604 device_printf(dev, 605 "cannot contigmalloc the mac filter table\n"); 606 return (ENOMEM); 607 } 608 ifq_set_maxlen(&ifp->if_snd, sc->vtnet_tx_size - 1); 609 ifq_set_ready(&ifp->if_snd); 610 611 ether_ifattach(ifp, sc->vtnet_hwaddr, NULL); 612 613 /* Tell the upper layer(s) we support long frames. */ 614 ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header); 615 ifp->if_capabilities |= IFCAP_JUMBO_MTU | IFCAP_VLAN_MTU; 616 617 if (virtio_with_feature(dev, VIRTIO_NET_F_CSUM)) { 618 ifp->if_capabilities |= IFCAP_TXCSUM; 619 620 if (virtio_with_feature(dev, VIRTIO_NET_F_HOST_TSO4)) 621 ifp->if_capabilities |= IFCAP_TSO4; 622 if (virtio_with_feature(dev, VIRTIO_NET_F_HOST_TSO6)) 623 ifp->if_capabilities |= IFCAP_TSO6; 624 if (ifp->if_capabilities & IFCAP_TSO) 625 ifp->if_capabilities |= IFCAP_VLAN_HWTSO; 626 627 if (virtio_with_feature(dev, VIRTIO_NET_F_HOST_ECN)) 628 sc->vtnet_flags |= VTNET_FLAG_TSO_ECN; 629 } 630 631 if (virtio_with_feature(dev, VIRTIO_NET_F_GUEST_CSUM)) { 632 ifp->if_capabilities |= IFCAP_RXCSUM; 633 634 if (virtio_with_feature(dev, VIRTIO_NET_F_GUEST_TSO4) || 635 virtio_with_feature(dev, VIRTIO_NET_F_GUEST_TSO6)) 636 ifp->if_capabilities |= IFCAP_LRO; 637 } 638 639 if (ifp->if_capabilities & IFCAP_HWCSUM) { 640 /* 641 * VirtIO does not support VLAN tagging, but we can fake 642 * it by inserting and removing the 802.1Q header during 643 * transmit and receive. We are then able to do checksum 644 * offloading of VLAN frames. 645 */ 646 ifp->if_capabilities |= 647 IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_HWCSUM; 648 } 649 650 ifp->if_capenable = ifp->if_capabilities; 651 652 /* 653 * Capabilities after here are not enabled by default. 654 */ 655 656 if (sc->vtnet_flags & VTNET_FLAG_VLAN_FILTER) { 657 ifp->if_capabilities |= IFCAP_VLAN_HWFILTER; 658 659 sc->vtnet_vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 660 vtnet_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 661 sc->vtnet_vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 662 vtnet_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 663 } 664 665 return (0); 666 } 667 668 static void 669 vtnet_set_hwaddr(struct vtnet_softc *sc) 670 { 671 device_t dev; 672 673 dev = sc->vtnet_dev; 674 675 if ((sc->vtnet_flags & VTNET_FLAG_CTRL_MAC) && 676 (sc->vtnet_flags & VTNET_FLAG_CTRL_RX)) { 677 if (vtnet_ctrl_mac_cmd(sc, sc->vtnet_hwaddr) != 0) 678 device_printf(dev, "unable to set MAC address\n"); 679 } else if (sc->vtnet_flags & VTNET_FLAG_MAC) { 680 virtio_write_device_config(dev, 681 offsetof(struct virtio_net_config, mac), 682 sc->vtnet_hwaddr, ETHER_ADDR_LEN); 683 } 684 } 685 686 static void 687 vtnet_get_hwaddr(struct vtnet_softc *sc) 688 { 689 device_t dev; 690 691 dev = sc->vtnet_dev; 692 693 if ((sc->vtnet_flags & VTNET_FLAG_MAC) == 0) { 694 /* 695 * Generate a random locally administered unicast address. 696 * 697 * It would be nice to generate the same MAC address across 698 * reboots, but it seems all the hosts currently available 699 * support the MAC feature, so this isn't too important. 700 */ 701 sc->vtnet_hwaddr[0] = 0xB2; 702 karc4rand(&sc->vtnet_hwaddr[1], ETHER_ADDR_LEN - 1); 703 vtnet_set_hwaddr(sc); 704 return; 705 } 706 707 virtio_read_device_config(dev, 708 offsetof(struct virtio_net_config, mac), 709 sc->vtnet_hwaddr, ETHER_ADDR_LEN); 710 } 711 712 static int 713 vtnet_is_link_up(struct vtnet_softc *sc) 714 { 715 device_t dev; 716 struct ifnet *ifp; 717 uint16_t status; 718 719 dev = sc->vtnet_dev; 720 ifp = sc->vtnet_ifp; 721 722 ASSERT_SERIALIZED(&sc->vtnet_slz); 723 724 if (virtio_with_feature(dev, VIRTIO_NET_F_STATUS)) { 725 status = virtio_read_dev_config_2(dev, 726 offsetof(struct virtio_net_config, status)); 727 } else { 728 status = VIRTIO_NET_S_LINK_UP; 729 } 730 731 return ((status & VIRTIO_NET_S_LINK_UP) != 0); 732 } 733 734 static void 735 vtnet_update_link_status(struct vtnet_softc *sc) 736 { 737 device_t dev; 738 struct ifnet *ifp; 739 struct ifaltq_subque *ifsq; 740 int link; 741 742 dev = sc->vtnet_dev; 743 ifp = sc->vtnet_ifp; 744 ifsq = ifq_get_subq_default(&ifp->if_snd); 745 746 link = vtnet_is_link_up(sc); 747 748 if (link && ((sc->vtnet_flags & VTNET_FLAG_LINK) == 0)) { 749 sc->vtnet_flags |= VTNET_FLAG_LINK; 750 if (bootverbose) 751 device_printf(dev, "Link is up\n"); 752 ifp->if_link_state = LINK_STATE_UP; 753 if_link_state_change(ifp); 754 if (!ifsq_is_empty(ifsq)) 755 vtnet_start_locked(ifp, ifsq); 756 } else if (!link && (sc->vtnet_flags & VTNET_FLAG_LINK)) { 757 sc->vtnet_flags &= ~VTNET_FLAG_LINK; 758 if (bootverbose) 759 device_printf(dev, "Link is down\n"); 760 761 ifp->if_link_state = LINK_STATE_DOWN; 762 if_link_state_change(ifp); 763 } 764 } 765 766 #if 0 767 static void 768 vtnet_watchdog(struct vtnet_softc *sc) 769 { 770 struct ifnet *ifp; 771 772 ifp = sc->vtnet_ifp; 773 774 #ifdef VTNET_TX_INTR_MODERATION 775 vtnet_txeof(sc); 776 #endif 777 778 if (sc->vtnet_watchdog_timer == 0 || --sc->vtnet_watchdog_timer) 779 return; 780 781 if_printf(ifp, "watchdog timeout -- resetting\n"); 782 #ifdef VTNET_DEBUG 783 virtqueue_dump(sc->vtnet_tx_vq); 784 #endif 785 ifp->if_oerrors++; 786 ifp->if_flags &= ~IFF_RUNNING; 787 vtnet_init_locked(sc); 788 } 789 #endif 790 791 static void 792 vtnet_config_change_task(void *arg, int pending) 793 { 794 struct vtnet_softc *sc; 795 796 sc = arg; 797 798 lwkt_serialize_enter(&sc->vtnet_slz); 799 vtnet_update_link_status(sc); 800 lwkt_serialize_exit(&sc->vtnet_slz); 801 } 802 803 static int 804 vtnet_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data,struct ucred *cr) 805 { 806 struct vtnet_softc *sc; 807 struct ifreq *ifr; 808 int reinit, mask, error; 809 810 sc = ifp->if_softc; 811 ifr = (struct ifreq *) data; 812 reinit = 0; 813 error = 0; 814 815 switch (cmd) { 816 case SIOCSIFMTU: 817 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > VTNET_MAX_MTU) 818 error = EINVAL; 819 else if (ifp->if_mtu != ifr->ifr_mtu) { 820 lwkt_serialize_enter(&sc->vtnet_slz); 821 error = vtnet_change_mtu(sc, ifr->ifr_mtu); 822 lwkt_serialize_exit(&sc->vtnet_slz); 823 } 824 break; 825 826 case SIOCSIFFLAGS: 827 lwkt_serialize_enter(&sc->vtnet_slz); 828 if ((ifp->if_flags & IFF_UP) == 0) { 829 if (ifp->if_flags & IFF_RUNNING) 830 vtnet_stop(sc); 831 } else if (ifp->if_flags & IFF_RUNNING) { 832 if ((ifp->if_flags ^ sc->vtnet_if_flags) & 833 (IFF_PROMISC | IFF_ALLMULTI)) { 834 if (sc->vtnet_flags & VTNET_FLAG_CTRL_RX) 835 vtnet_rx_filter(sc); 836 else 837 error = ENOTSUP; 838 } 839 } else 840 vtnet_init_locked(sc); 841 842 if (error == 0) 843 sc->vtnet_if_flags = ifp->if_flags; 844 lwkt_serialize_exit(&sc->vtnet_slz); 845 break; 846 847 case SIOCADDMULTI: 848 case SIOCDELMULTI: 849 lwkt_serialize_enter(&sc->vtnet_slz); 850 if ((sc->vtnet_flags & VTNET_FLAG_CTRL_RX) && 851 (ifp->if_flags & IFF_RUNNING)) 852 vtnet_rx_filter_mac(sc); 853 lwkt_serialize_exit(&sc->vtnet_slz); 854 break; 855 856 case SIOCSIFMEDIA: 857 case SIOCGIFMEDIA: 858 error = ifmedia_ioctl(ifp, ifr, &sc->vtnet_media, cmd); 859 break; 860 861 case SIOCSIFCAP: 862 mask = ifr->ifr_reqcap ^ ifp->if_capenable; 863 864 lwkt_serialize_enter(&sc->vtnet_slz); 865 866 if (mask & IFCAP_TXCSUM) { 867 ifp->if_capenable ^= IFCAP_TXCSUM; 868 if (ifp->if_capenable & IFCAP_TXCSUM) 869 ifp->if_hwassist |= VTNET_CSUM_OFFLOAD; 870 else 871 ifp->if_hwassist &= ~VTNET_CSUM_OFFLOAD; 872 } 873 874 if (mask & IFCAP_TSO4) { 875 ifp->if_capenable ^= IFCAP_TSO4; 876 if (ifp->if_capenable & IFCAP_TSO4) 877 ifp->if_hwassist |= CSUM_TSO; 878 else 879 ifp->if_hwassist &= ~CSUM_TSO; 880 } 881 882 if (mask & IFCAP_RXCSUM) { 883 ifp->if_capenable ^= IFCAP_RXCSUM; 884 reinit = 1; 885 } 886 887 if (mask & IFCAP_LRO) { 888 ifp->if_capenable ^= IFCAP_LRO; 889 reinit = 1; 890 } 891 892 if (mask & IFCAP_VLAN_HWFILTER) { 893 ifp->if_capenable ^= IFCAP_VLAN_HWFILTER; 894 reinit = 1; 895 } 896 897 if (mask & IFCAP_VLAN_HWTSO) 898 ifp->if_capenable ^= IFCAP_VLAN_HWTSO; 899 900 if (mask & IFCAP_VLAN_HWTAGGING) 901 ifp->if_capenable ^= IFCAP_VLAN_HWTAGGING; 902 903 if (reinit && (ifp->if_flags & IFF_RUNNING)) { 904 ifp->if_flags &= ~IFF_RUNNING; 905 vtnet_init_locked(sc); 906 } 907 //VLAN_CAPABILITIES(ifp); 908 909 lwkt_serialize_exit(&sc->vtnet_slz); 910 break; 911 912 default: 913 error = ether_ioctl(ifp, cmd, data); 914 break; 915 } 916 917 return (error); 918 } 919 920 static int 921 vtnet_change_mtu(struct vtnet_softc *sc, int new_mtu) 922 { 923 struct ifnet *ifp; 924 int new_frame_size, clsize; 925 926 ifp = sc->vtnet_ifp; 927 928 if ((sc->vtnet_flags & VTNET_FLAG_MRG_RXBUFS) == 0) { 929 new_frame_size = sizeof(struct vtnet_rx_header) + 930 sizeof(struct ether_vlan_header) + new_mtu; 931 932 if (new_frame_size > MJUM9BYTES) 933 return (EINVAL); 934 935 if (new_frame_size <= MCLBYTES) 936 clsize = MCLBYTES; 937 else 938 clsize = MJUM9BYTES; 939 } else { 940 new_frame_size = sizeof(struct virtio_net_hdr_mrg_rxbuf) + 941 sizeof(struct ether_vlan_header) + new_mtu; 942 943 if (new_frame_size <= MCLBYTES) 944 clsize = MCLBYTES; 945 else 946 clsize = MJUMPAGESIZE; 947 } 948 949 sc->vtnet_rx_mbuf_size = clsize; 950 sc->vtnet_rx_mbuf_count = VTNET_NEEDED_RX_MBUFS(sc); 951 KASSERT(sc->vtnet_rx_mbuf_count < VTNET_MAX_RX_SEGS, 952 ("too many rx mbufs: %d", sc->vtnet_rx_mbuf_count)); 953 954 ifp->if_mtu = new_mtu; 955 956 if (ifp->if_flags & IFF_RUNNING) { 957 ifp->if_flags &= ~IFF_RUNNING; 958 vtnet_init_locked(sc); 959 } 960 961 return (0); 962 } 963 964 static int 965 vtnet_init_rx_vq(struct vtnet_softc *sc) 966 { 967 struct virtqueue *vq; 968 int nbufs, error; 969 970 vq = sc->vtnet_rx_vq; 971 nbufs = 0; 972 error = ENOSPC; 973 974 while (!virtqueue_full(vq)) { 975 if ((error = vtnet_newbuf(sc)) != 0) 976 break; 977 nbufs++; 978 } 979 980 if (nbufs > 0) { 981 virtqueue_notify(vq, &sc->vtnet_slz); 982 983 /* 984 * EMSGSIZE signifies the virtqueue did not have enough 985 * entries available to hold the last mbuf. This is not 986 * an error. We should not get ENOSPC since we check if 987 * the virtqueue is full before attempting to add a 988 * buffer. 989 */ 990 if (error == EMSGSIZE) 991 error = 0; 992 } 993 994 return (error); 995 } 996 997 static void 998 vtnet_free_rx_mbufs(struct vtnet_softc *sc) 999 { 1000 struct virtqueue *vq; 1001 struct mbuf *m; 1002 int last; 1003 1004 vq = sc->vtnet_rx_vq; 1005 last = 0; 1006 1007 while ((m = virtqueue_drain(vq, &last)) != NULL) 1008 m_freem(m); 1009 1010 KASSERT(virtqueue_empty(vq), ("mbufs remaining in Rx Vq")); 1011 } 1012 1013 static void 1014 vtnet_free_tx_mbufs(struct vtnet_softc *sc) 1015 { 1016 struct virtqueue *vq; 1017 struct vtnet_tx_header *txhdr; 1018 int last; 1019 1020 vq = sc->vtnet_tx_vq; 1021 last = 0; 1022 1023 while ((txhdr = virtqueue_drain(vq, &last)) != NULL) { 1024 m_freem(txhdr->vth_mbuf); 1025 vtnet_enqueue_txhdr(sc, txhdr); 1026 } 1027 1028 KASSERT(virtqueue_empty(vq), ("mbufs remaining in Tx Vq")); 1029 } 1030 1031 static void 1032 vtnet_free_ctrl_vq(struct vtnet_softc *sc) 1033 { 1034 /* 1035 * The control virtqueue is only polled, therefore 1036 * it should already be empty. 1037 */ 1038 KASSERT(virtqueue_empty(sc->vtnet_ctrl_vq), 1039 ("Ctrl Vq not empty")); 1040 } 1041 1042 static struct mbuf * 1043 vtnet_alloc_rxbuf(struct vtnet_softc *sc, int nbufs, struct mbuf **m_tailp) 1044 { 1045 struct mbuf *m_head, *m_tail, *m; 1046 int i, clsize; 1047 1048 clsize = sc->vtnet_rx_mbuf_size; 1049 1050 /*use getcl instead of getjcl. see if_mxge.c comment line 2398*/ 1051 //m_head = m_getjcl(M_DONTWAIT, MT_DATA, M_PKTHDR, clsize); 1052 m_head = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR ); 1053 if (m_head == NULL) 1054 goto fail; 1055 1056 m_head->m_len = clsize; 1057 m_tail = m_head; 1058 1059 if (nbufs > 1) { 1060 KASSERT(sc->vtnet_flags & VTNET_FLAG_LRO_NOMRG, 1061 ("chained Rx mbuf requested without LRO_NOMRG")); 1062 1063 for (i = 0; i < nbufs - 1; i++) { 1064 //m = m_getjcl(M_DONTWAIT, MT_DATA, 0, clsize); 1065 m = m_getcl(M_NOWAIT, MT_DATA, 0); 1066 if (m == NULL) 1067 goto fail; 1068 1069 m->m_len = clsize; 1070 m_tail->m_next = m; 1071 m_tail = m; 1072 } 1073 } 1074 1075 if (m_tailp != NULL) 1076 *m_tailp = m_tail; 1077 1078 return (m_head); 1079 1080 fail: 1081 sc->vtnet_stats.mbuf_alloc_failed++; 1082 m_freem(m_head); 1083 1084 return (NULL); 1085 } 1086 1087 static int 1088 vtnet_replace_rxbuf(struct vtnet_softc *sc, struct mbuf *m0, int len0) 1089 { 1090 struct mbuf *m, *m_prev; 1091 struct mbuf *m_new, *m_tail; 1092 int len, clsize, nreplace, error; 1093 1094 m = m0; 1095 m_prev = NULL; 1096 len = len0; 1097 1098 m_tail = NULL; 1099 clsize = sc->vtnet_rx_mbuf_size; 1100 nreplace = 0; 1101 1102 if (m->m_next != NULL) 1103 KASSERT(sc->vtnet_flags & VTNET_FLAG_LRO_NOMRG, 1104 ("chained Rx mbuf without LRO_NOMRG")); 1105 1106 /* 1107 * Since LRO_NOMRG mbuf chains are so large, we want to avoid 1108 * allocating an entire chain for each received frame. When 1109 * the received frame's length is less than that of the chain, 1110 * the unused mbufs are reassigned to the new chain. 1111 */ 1112 while (len > 0) { 1113 /* 1114 * Something is seriously wrong if we received 1115 * a frame larger than the mbuf chain. Drop it. 1116 */ 1117 if (m == NULL) { 1118 sc->vtnet_stats.rx_frame_too_large++; 1119 return (EMSGSIZE); 1120 } 1121 1122 KASSERT(m->m_len == clsize, 1123 ("mbuf length not expected cluster size: %d", 1124 m->m_len)); 1125 1126 m->m_len = MIN(m->m_len, len); 1127 len -= m->m_len; 1128 1129 m_prev = m; 1130 m = m->m_next; 1131 nreplace++; 1132 } 1133 1134 KASSERT(m_prev != NULL, ("m_prev == NULL")); 1135 KASSERT(nreplace <= sc->vtnet_rx_mbuf_count, 1136 ("too many replacement mbufs: %d/%d", nreplace, 1137 sc->vtnet_rx_mbuf_count)); 1138 1139 m_new = vtnet_alloc_rxbuf(sc, nreplace, &m_tail); 1140 if (m_new == NULL) { 1141 m_prev->m_len = clsize; 1142 return (ENOBUFS); 1143 } 1144 1145 /* 1146 * Move unused mbufs, if any, from the original chain 1147 * onto the end of the new chain. 1148 */ 1149 if (m_prev->m_next != NULL) { 1150 m_tail->m_next = m_prev->m_next; 1151 m_prev->m_next = NULL; 1152 } 1153 1154 error = vtnet_enqueue_rxbuf(sc, m_new); 1155 if (error) { 1156 /* 1157 * BAD! We could not enqueue the replacement mbuf chain. We 1158 * must restore the m0 chain to the original state if it was 1159 * modified so we can subsequently discard it. 1160 * 1161 * NOTE: The replacement is suppose to be an identical copy 1162 * to the one just dequeued so this is an unexpected error. 1163 */ 1164 sc->vtnet_stats.rx_enq_replacement_failed++; 1165 1166 if (m_tail->m_next != NULL) { 1167 m_prev->m_next = m_tail->m_next; 1168 m_tail->m_next = NULL; 1169 } 1170 1171 m_prev->m_len = clsize; 1172 m_freem(m_new); 1173 } 1174 1175 return (error); 1176 } 1177 1178 static int 1179 vtnet_newbuf(struct vtnet_softc *sc) 1180 { 1181 struct mbuf *m; 1182 int error; 1183 1184 m = vtnet_alloc_rxbuf(sc, sc->vtnet_rx_mbuf_count, NULL); 1185 if (m == NULL) 1186 return (ENOBUFS); 1187 1188 error = vtnet_enqueue_rxbuf(sc, m); 1189 if (error) 1190 m_freem(m); 1191 1192 return (error); 1193 } 1194 1195 static void 1196 vtnet_discard_merged_rxbuf(struct vtnet_softc *sc, int nbufs) 1197 { 1198 struct virtqueue *vq; 1199 struct mbuf *m; 1200 1201 vq = sc->vtnet_rx_vq; 1202 1203 while (--nbufs > 0) { 1204 if ((m = virtqueue_dequeue(vq, NULL)) == NULL) 1205 break; 1206 vtnet_discard_rxbuf(sc, m); 1207 } 1208 } 1209 1210 static void 1211 vtnet_discard_rxbuf(struct vtnet_softc *sc, struct mbuf *m) 1212 { 1213 int error; 1214 1215 /* 1216 * Requeue the discarded mbuf. This should always be 1217 * successful since it was just dequeued. 1218 */ 1219 error = vtnet_enqueue_rxbuf(sc, m); 1220 KASSERT(error == 0, ("cannot requeue discarded mbuf")); 1221 } 1222 1223 static int 1224 vtnet_enqueue_rxbuf(struct vtnet_softc *sc, struct mbuf *m) 1225 { 1226 struct sglist sg; 1227 struct sglist_seg segs[VTNET_MAX_RX_SEGS]; 1228 struct vtnet_rx_header *rxhdr; 1229 struct virtio_net_hdr *hdr; 1230 uint8_t *mdata; 1231 int offset, error; 1232 1233 ASSERT_SERIALIZED(&sc->vtnet_slz); 1234 if ((sc->vtnet_flags & VTNET_FLAG_LRO_NOMRG) == 0) 1235 KASSERT(m->m_next == NULL, ("chained Rx mbuf")); 1236 1237 sglist_init(&sg, sc->vtnet_rx_nsegs, segs); 1238 1239 mdata = mtod(m, uint8_t *); 1240 offset = 0; 1241 1242 if ((sc->vtnet_flags & VTNET_FLAG_MRG_RXBUFS) == 0) { 1243 rxhdr = (struct vtnet_rx_header *) mdata; 1244 hdr = &rxhdr->vrh_hdr; 1245 offset += sizeof(struct vtnet_rx_header); 1246 1247 error = sglist_append(&sg, hdr, sc->vtnet_hdr_size); 1248 KASSERT(error == 0, ("cannot add header to sglist")); 1249 } 1250 1251 error = sglist_append(&sg, mdata + offset, m->m_len - offset); 1252 if (error) 1253 return (error); 1254 1255 if (m->m_next != NULL) { 1256 error = sglist_append_mbuf(&sg, m->m_next); 1257 if (error) 1258 return (error); 1259 } 1260 1261 return (virtqueue_enqueue(sc->vtnet_rx_vq, m, &sg, 0, sg.sg_nseg)); 1262 } 1263 1264 static void 1265 vtnet_vlan_tag_remove(struct mbuf *m) 1266 { 1267 struct ether_vlan_header *evl; 1268 1269 evl = mtod(m, struct ether_vlan_header *); 1270 1271 m->m_pkthdr.ether_vlantag = ntohs(evl->evl_tag); 1272 m->m_flags |= M_VLANTAG; 1273 1274 /* Strip the 802.1Q header. */ 1275 bcopy((char *) evl, (char *) evl + ETHER_VLAN_ENCAP_LEN, 1276 ETHER_HDR_LEN - ETHER_TYPE_LEN); 1277 m_adj(m, ETHER_VLAN_ENCAP_LEN); 1278 } 1279 1280 /* 1281 * Alternative method of doing receive checksum offloading. Rather 1282 * than parsing the received frame down to the IP header, use the 1283 * csum_offset to determine which CSUM_* flags are appropriate. We 1284 * can get by with doing this only because the checksum offsets are 1285 * unique for the things we care about. 1286 */ 1287 static int 1288 vtnet_rx_csum(struct vtnet_softc *sc, struct mbuf *m, 1289 struct virtio_net_hdr *hdr) 1290 { 1291 struct ether_header *eh; 1292 struct ether_vlan_header *evh; 1293 struct udphdr *udp; 1294 int csum_len; 1295 uint16_t eth_type; 1296 1297 csum_len = hdr->csum_start + hdr->csum_offset; 1298 1299 if (csum_len < sizeof(struct ether_header) + sizeof(struct ip)) 1300 return (1); 1301 if (m->m_len < csum_len) 1302 return (1); 1303 1304 eh = mtod(m, struct ether_header *); 1305 eth_type = ntohs(eh->ether_type); 1306 if (eth_type == ETHERTYPE_VLAN) { 1307 evh = mtod(m, struct ether_vlan_header *); 1308 eth_type = ntohs(evh->evl_proto); 1309 } 1310 1311 if (eth_type != ETHERTYPE_IP && eth_type != ETHERTYPE_IPV6) { 1312 sc->vtnet_stats.rx_csum_bad_ethtype++; 1313 return (1); 1314 } 1315 1316 /* Use the offset to determine the appropriate CSUM_* flags. */ 1317 switch (hdr->csum_offset) { 1318 case offsetof(struct udphdr, uh_sum): 1319 if (m->m_len < hdr->csum_start + sizeof(struct udphdr)) 1320 return (1); 1321 udp = (struct udphdr *)(mtod(m, uint8_t *) + hdr->csum_start); 1322 if (udp->uh_sum == 0) 1323 return (0); 1324 1325 /* FALLTHROUGH */ 1326 1327 case offsetof(struct tcphdr, th_sum): 1328 m->m_pkthdr.csum_flags |= CSUM_DATA_VALID | CSUM_PSEUDO_HDR; 1329 m->m_pkthdr.csum_data = 0xFFFF; 1330 break; 1331 1332 default: 1333 sc->vtnet_stats.rx_csum_bad_offset++; 1334 return (1); 1335 } 1336 1337 sc->vtnet_stats.rx_csum_offloaded++; 1338 1339 return (0); 1340 } 1341 1342 static int 1343 vtnet_rxeof_merged(struct vtnet_softc *sc, struct mbuf *m_head, int nbufs) 1344 { 1345 struct ifnet *ifp; 1346 struct virtqueue *vq; 1347 struct mbuf *m, *m_tail; 1348 int len; 1349 1350 ifp = sc->vtnet_ifp; 1351 vq = sc->vtnet_rx_vq; 1352 m_tail = m_head; 1353 1354 while (--nbufs > 0) { 1355 m = virtqueue_dequeue(vq, &len); 1356 if (m == NULL) { 1357 ifp->if_ierrors++; 1358 goto fail; 1359 } 1360 1361 if (vtnet_newbuf(sc) != 0) { 1362 ifp->if_iqdrops++; 1363 vtnet_discard_rxbuf(sc, m); 1364 if (nbufs > 1) 1365 vtnet_discard_merged_rxbuf(sc, nbufs); 1366 goto fail; 1367 } 1368 1369 if (m->m_len < len) 1370 len = m->m_len; 1371 1372 m->m_len = len; 1373 m->m_flags &= ~M_PKTHDR; 1374 1375 m_head->m_pkthdr.len += len; 1376 m_tail->m_next = m; 1377 m_tail = m; 1378 } 1379 1380 return (0); 1381 1382 fail: 1383 sc->vtnet_stats.rx_mergeable_failed++; 1384 m_freem(m_head); 1385 1386 return (1); 1387 } 1388 1389 static int 1390 vtnet_rxeof(struct vtnet_softc *sc, int count, int *rx_npktsp) 1391 { 1392 struct virtio_net_hdr lhdr; 1393 struct ifnet *ifp; 1394 struct virtqueue *vq; 1395 struct mbuf *m; 1396 struct ether_header *eh; 1397 struct virtio_net_hdr *hdr; 1398 struct virtio_net_hdr_mrg_rxbuf *mhdr; 1399 int len, deq, nbufs, adjsz, rx_npkts; 1400 1401 ifp = sc->vtnet_ifp; 1402 vq = sc->vtnet_rx_vq; 1403 hdr = &lhdr; 1404 deq = 0; 1405 rx_npkts = 0; 1406 1407 ASSERT_SERIALIZED(&sc->vtnet_slz); 1408 1409 while (--count >= 0) { 1410 m = virtqueue_dequeue(vq, &len); 1411 if (m == NULL) 1412 break; 1413 deq++; 1414 1415 if (len < sc->vtnet_hdr_size + ETHER_HDR_LEN) { 1416 ifp->if_ierrors++; 1417 vtnet_discard_rxbuf(sc, m); 1418 continue; 1419 } 1420 1421 if ((sc->vtnet_flags & VTNET_FLAG_MRG_RXBUFS) == 0) { 1422 nbufs = 1; 1423 adjsz = sizeof(struct vtnet_rx_header); 1424 /* 1425 * Account for our pad between the header and 1426 * the actual start of the frame. 1427 */ 1428 len += VTNET_RX_HEADER_PAD; 1429 } else { 1430 mhdr = mtod(m, struct virtio_net_hdr_mrg_rxbuf *); 1431 nbufs = mhdr->num_buffers; 1432 adjsz = sizeof(struct virtio_net_hdr_mrg_rxbuf); 1433 } 1434 1435 if (vtnet_replace_rxbuf(sc, m, len) != 0) { 1436 ifp->if_iqdrops++; 1437 vtnet_discard_rxbuf(sc, m); 1438 if (nbufs > 1) 1439 vtnet_discard_merged_rxbuf(sc, nbufs); 1440 continue; 1441 } 1442 1443 m->m_pkthdr.len = len; 1444 m->m_pkthdr.rcvif = ifp; 1445 m->m_pkthdr.csum_flags = 0; 1446 1447 if (nbufs > 1) { 1448 if (vtnet_rxeof_merged(sc, m, nbufs) != 0) 1449 continue; 1450 } 1451 1452 ifp->if_ipackets++; 1453 1454 /* 1455 * Save copy of header before we strip it. For both mergeable 1456 * and non-mergeable, the VirtIO header is placed first in the 1457 * mbuf's data. We no longer need num_buffers, so always use a 1458 * virtio_net_hdr. 1459 */ 1460 memcpy(hdr, mtod(m, void *), sizeof(struct virtio_net_hdr)); 1461 m_adj(m, adjsz); 1462 1463 if (ifp->if_capenable & IFCAP_VLAN_HWTAGGING) { 1464 eh = mtod(m, struct ether_header *); 1465 if (eh->ether_type == htons(ETHERTYPE_VLAN)) { 1466 vtnet_vlan_tag_remove(m); 1467 1468 /* 1469 * With the 802.1Q header removed, update the 1470 * checksum starting location accordingly. 1471 */ 1472 if (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) 1473 hdr->csum_start -= 1474 ETHER_VLAN_ENCAP_LEN; 1475 } 1476 } 1477 1478 if (ifp->if_capenable & IFCAP_RXCSUM && 1479 hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) { 1480 if (vtnet_rx_csum(sc, m, hdr) != 0) 1481 sc->vtnet_stats.rx_csum_failed++; 1482 } 1483 1484 lwkt_serialize_exit(&sc->vtnet_slz); 1485 rx_npkts++; 1486 ifp->if_input(ifp, m, NULL, -1); 1487 lwkt_serialize_enter(&sc->vtnet_slz); 1488 1489 /* 1490 * The interface may have been stopped while we were 1491 * passing the packet up the network stack. 1492 */ 1493 if ((ifp->if_flags & IFF_RUNNING) == 0) 1494 break; 1495 } 1496 1497 virtqueue_notify(vq, &sc->vtnet_slz); 1498 1499 if (rx_npktsp != NULL) 1500 *rx_npktsp = rx_npkts; 1501 1502 return (count > 0 ? 0 : EAGAIN); 1503 } 1504 1505 static void 1506 vtnet_rx_intr_task(void *arg) 1507 { 1508 struct vtnet_softc *sc; 1509 struct ifnet *ifp; 1510 int more; 1511 1512 sc = arg; 1513 ifp = sc->vtnet_ifp; 1514 1515 next: 1516 // lwkt_serialize_enter(&sc->vtnet_slz); 1517 1518 if ((ifp->if_flags & IFF_RUNNING) == 0) { 1519 vtnet_enable_rx_intr(sc); 1520 // lwkt_serialize_exit(&sc->vtnet_slz); 1521 return; 1522 } 1523 1524 more = vtnet_rxeof(sc, sc->vtnet_rx_process_limit, NULL); 1525 if (!more && vtnet_enable_rx_intr(sc) != 0) { 1526 vtnet_disable_rx_intr(sc); 1527 more = 1; 1528 } 1529 1530 // lwkt_serialize_exit(&sc->vtnet_slz); 1531 1532 if (more) { 1533 sc->vtnet_stats.rx_task_rescheduled++; 1534 goto next; 1535 } 1536 } 1537 1538 static int 1539 vtnet_rx_vq_intr(void *xsc) 1540 { 1541 struct vtnet_softc *sc; 1542 1543 sc = xsc; 1544 1545 vtnet_disable_rx_intr(sc); 1546 vtnet_rx_intr_task(sc); 1547 1548 return (1); 1549 } 1550 1551 static void 1552 vtnet_enqueue_txhdr(struct vtnet_softc *sc, struct vtnet_tx_header *txhdr) 1553 { 1554 bzero(txhdr, sizeof(*txhdr)); 1555 SLIST_INSERT_HEAD(&sc->vtnet_txhdr_free, txhdr, link); 1556 } 1557 1558 static void 1559 vtnet_txeof(struct vtnet_softc *sc) 1560 { 1561 struct virtqueue *vq; 1562 struct ifnet *ifp; 1563 struct vtnet_tx_header *txhdr; 1564 int deq; 1565 1566 vq = sc->vtnet_tx_vq; 1567 ifp = sc->vtnet_ifp; 1568 deq = 0; 1569 1570 ASSERT_SERIALIZED(&sc->vtnet_slz); 1571 1572 while ((txhdr = virtqueue_dequeue(vq, NULL)) != NULL) { 1573 deq++; 1574 ifp->if_opackets++; 1575 m_freem(txhdr->vth_mbuf); 1576 vtnet_enqueue_txhdr(sc, txhdr); 1577 } 1578 1579 if (deq > 0) { 1580 ifq_clr_oactive(&ifp->if_snd); 1581 if (virtqueue_empty(vq)) 1582 sc->vtnet_watchdog_timer = 0; 1583 } 1584 } 1585 1586 static struct mbuf * 1587 vtnet_tx_offload(struct vtnet_softc *sc, struct mbuf *m, 1588 struct virtio_net_hdr *hdr) 1589 { 1590 struct ifnet *ifp; 1591 struct ether_header *eh; 1592 struct ether_vlan_header *evh; 1593 struct ip *ip; 1594 struct ip6_hdr *ip6; 1595 struct tcphdr *tcp; 1596 int ip_offset; 1597 uint16_t eth_type, csum_start; 1598 uint8_t ip_proto, gso_type; 1599 1600 ifp = sc->vtnet_ifp; 1601 M_ASSERTPKTHDR(m); 1602 1603 ip_offset = sizeof(struct ether_header); 1604 if (m->m_len < ip_offset) { 1605 if ((m = m_pullup(m, ip_offset)) == NULL) 1606 return (NULL); 1607 } 1608 1609 eh = mtod(m, struct ether_header *); 1610 eth_type = ntohs(eh->ether_type); 1611 if (eth_type == ETHERTYPE_VLAN) { 1612 ip_offset = sizeof(struct ether_vlan_header); 1613 if (m->m_len < ip_offset) { 1614 if ((m = m_pullup(m, ip_offset)) == NULL) 1615 return (NULL); 1616 } 1617 evh = mtod(m, struct ether_vlan_header *); 1618 eth_type = ntohs(evh->evl_proto); 1619 } 1620 1621 switch (eth_type) { 1622 case ETHERTYPE_IP: 1623 if (m->m_len < ip_offset + sizeof(struct ip)) { 1624 m = m_pullup(m, ip_offset + sizeof(struct ip)); 1625 if (m == NULL) 1626 return (NULL); 1627 } 1628 1629 ip = (struct ip *)(mtod(m, uint8_t *) + ip_offset); 1630 ip_proto = ip->ip_p; 1631 csum_start = ip_offset + (ip->ip_hl << 2); 1632 gso_type = VIRTIO_NET_HDR_GSO_TCPV4; 1633 break; 1634 1635 case ETHERTYPE_IPV6: 1636 if (m->m_len < ip_offset + sizeof(struct ip6_hdr)) { 1637 m = m_pullup(m, ip_offset + sizeof(struct ip6_hdr)); 1638 if (m == NULL) 1639 return (NULL); 1640 } 1641 1642 ip6 = (struct ip6_hdr *)(mtod(m, uint8_t *) + ip_offset); 1643 /* 1644 * XXX Assume no extension headers are present. Presently, 1645 * this will always be true in the case of TSO, and FreeBSD 1646 * does not perform checksum offloading of IPv6 yet. 1647 */ 1648 ip_proto = ip6->ip6_nxt; 1649 csum_start = ip_offset + sizeof(struct ip6_hdr); 1650 gso_type = VIRTIO_NET_HDR_GSO_TCPV6; 1651 break; 1652 1653 default: 1654 return (m); 1655 } 1656 1657 if (m->m_pkthdr.csum_flags & VTNET_CSUM_OFFLOAD) { 1658 hdr->flags |= VIRTIO_NET_HDR_F_NEEDS_CSUM; 1659 hdr->csum_start = csum_start; 1660 hdr->csum_offset = m->m_pkthdr.csum_data; 1661 1662 sc->vtnet_stats.tx_csum_offloaded++; 1663 } 1664 1665 if (m->m_pkthdr.csum_flags & CSUM_TSO) { 1666 if (ip_proto != IPPROTO_TCP) 1667 return (m); 1668 1669 if (m->m_len < csum_start + sizeof(struct tcphdr)) { 1670 m = m_pullup(m, csum_start + sizeof(struct tcphdr)); 1671 if (m == NULL) 1672 return (NULL); 1673 } 1674 1675 tcp = (struct tcphdr *)(mtod(m, uint8_t *) + csum_start); 1676 hdr->gso_type = gso_type; 1677 hdr->hdr_len = csum_start + (tcp->th_off << 2); 1678 hdr->gso_size = m->m_pkthdr.tso_segsz; 1679 1680 if (tcp->th_flags & TH_CWR) { 1681 /* 1682 * Drop if we did not negotiate VIRTIO_NET_F_HOST_ECN. 1683 * ECN support is only configurable globally with the 1684 * net.inet.tcp.ecn.enable sysctl knob. 1685 */ 1686 if ((sc->vtnet_flags & VTNET_FLAG_TSO_ECN) == 0) { 1687 if_printf(ifp, "TSO with ECN not supported " 1688 "by host\n"); 1689 m_freem(m); 1690 return (NULL); 1691 } 1692 1693 hdr->gso_type |= VIRTIO_NET_HDR_GSO_ECN; 1694 } 1695 1696 sc->vtnet_stats.tx_tso_offloaded++; 1697 } 1698 1699 return (m); 1700 } 1701 1702 static int 1703 vtnet_enqueue_txbuf(struct vtnet_softc *sc, struct mbuf **m_head, 1704 struct vtnet_tx_header *txhdr) 1705 { 1706 struct sglist sg; 1707 struct sglist_seg segs[VTNET_MAX_TX_SEGS]; 1708 struct virtqueue *vq; 1709 struct mbuf *m; 1710 int error; 1711 1712 vq = sc->vtnet_tx_vq; 1713 m = *m_head; 1714 1715 sglist_init(&sg, sc->vtnet_tx_nsegs, segs); 1716 error = sglist_append(&sg, &txhdr->vth_uhdr, sc->vtnet_hdr_size); 1717 KASSERT(error == 0 && sg.sg_nseg == 1, 1718 ("%s: error %d adding header to sglist", __func__, error)); 1719 1720 error = sglist_append_mbuf(&sg, m); 1721 if (error) { 1722 m = m_defrag(m, M_NOWAIT); 1723 if (m == NULL) 1724 goto fail; 1725 1726 *m_head = m; 1727 sc->vtnet_stats.tx_defragged++; 1728 1729 error = sglist_append_mbuf(&sg, m); 1730 if (error) 1731 goto fail; 1732 } 1733 1734 txhdr->vth_mbuf = m; 1735 error = virtqueue_enqueue(vq, txhdr, &sg, sg.sg_nseg, 0); 1736 1737 return (error); 1738 1739 fail: 1740 sc->vtnet_stats.tx_defrag_failed++; 1741 m_freem(*m_head); 1742 *m_head = NULL; 1743 1744 return (ENOBUFS); 1745 } 1746 1747 static struct mbuf * 1748 vtnet_vlan_tag_insert(struct mbuf *m) 1749 { 1750 struct mbuf *n; 1751 struct ether_vlan_header *evl; 1752 1753 if (M_WRITABLE(m) == 0) { 1754 n = m_dup(m, M_NOWAIT); 1755 m_freem(m); 1756 if ((m = n) == NULL) 1757 return (NULL); 1758 } 1759 1760 M_PREPEND(m, ETHER_VLAN_ENCAP_LEN, M_NOWAIT); 1761 if (m == NULL) 1762 return (NULL); 1763 if (m->m_len < sizeof(struct ether_vlan_header)) { 1764 m = m_pullup(m, sizeof(struct ether_vlan_header)); 1765 if (m == NULL) 1766 return (NULL); 1767 } 1768 1769 /* Insert 802.1Q header into the existing Ethernet header. */ 1770 evl = mtod(m, struct ether_vlan_header *); 1771 bcopy((char *) evl + ETHER_VLAN_ENCAP_LEN, 1772 (char *) evl, ETHER_HDR_LEN - ETHER_TYPE_LEN); 1773 evl->evl_encap_proto = htons(ETHERTYPE_VLAN); 1774 evl->evl_tag = htons(m->m_pkthdr.ether_vlantag); 1775 m->m_flags &= ~M_VLANTAG; 1776 1777 return (m); 1778 } 1779 1780 static int 1781 vtnet_encap(struct vtnet_softc *sc, struct mbuf **m_head) 1782 { 1783 struct vtnet_tx_header *txhdr; 1784 struct virtio_net_hdr *hdr; 1785 struct mbuf *m; 1786 int error; 1787 1788 txhdr = SLIST_FIRST(&sc->vtnet_txhdr_free); 1789 if (txhdr == NULL) 1790 return (ENOBUFS); 1791 SLIST_REMOVE_HEAD(&sc->vtnet_txhdr_free, link); 1792 1793 /* 1794 * Always use the non-mergeable header to simplify things. When 1795 * the mergeable feature is negotiated, the num_buffers field 1796 * must be set to zero. We use vtnet_hdr_size later to enqueue 1797 * the correct header size to the host. 1798 */ 1799 hdr = &txhdr->vth_uhdr.hdr; 1800 m = *m_head; 1801 1802 error = ENOBUFS; 1803 1804 if (m->m_flags & M_VLANTAG) { 1805 //m = ether_vlanencap(m, m->m_pkthdr.ether_vtag); 1806 m = vtnet_vlan_tag_insert(m); 1807 if ((*m_head = m) == NULL) 1808 goto fail; 1809 m->m_flags &= ~M_VLANTAG; 1810 } 1811 1812 if (m->m_pkthdr.csum_flags != 0) { 1813 m = vtnet_tx_offload(sc, m, hdr); 1814 if ((*m_head = m) == NULL) 1815 goto fail; 1816 } 1817 1818 error = vtnet_enqueue_txbuf(sc, m_head, txhdr); 1819 fail: 1820 if (error != 0) 1821 vtnet_enqueue_txhdr(sc, txhdr); 1822 return (error); 1823 } 1824 1825 static void 1826 vtnet_start(struct ifnet *ifp, struct ifaltq_subque *ifsq) 1827 { 1828 struct vtnet_softc *sc; 1829 1830 sc = ifp->if_softc; 1831 1832 ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq); 1833 lwkt_serialize_enter(&sc->vtnet_slz); 1834 vtnet_start_locked(ifp, ifsq); 1835 lwkt_serialize_exit(&sc->vtnet_slz); 1836 } 1837 1838 static void 1839 vtnet_start_locked(struct ifnet *ifp, struct ifaltq_subque *ifsq) 1840 { 1841 struct vtnet_softc *sc; 1842 struct virtqueue *vq; 1843 struct mbuf *m0; 1844 int enq; 1845 1846 sc = ifp->if_softc; 1847 vq = sc->vtnet_tx_vq; 1848 enq = 0; 1849 1850 ASSERT_SERIALIZED(&sc->vtnet_slz); 1851 1852 if ((ifp->if_flags & (IFF_RUNNING)) != 1853 IFF_RUNNING || ((sc->vtnet_flags & VTNET_FLAG_LINK) == 0)) 1854 return; 1855 1856 #ifdef VTNET_TX_INTR_MODERATION 1857 if (virtqueue_nused(vq) >= sc->vtnet_tx_size / 2) 1858 vtnet_txeof(sc); 1859 #endif 1860 1861 while (!ifsq_is_empty(ifsq)) { 1862 if (virtqueue_full(vq)) { 1863 ifq_set_oactive(&ifp->if_snd); 1864 break; 1865 } 1866 1867 m0 = ifq_dequeue(&ifp->if_snd); 1868 if (m0 == NULL) 1869 break; 1870 1871 if (vtnet_encap(sc, &m0) != 0) { 1872 if (m0 == NULL) 1873 break; 1874 ifq_prepend(&ifp->if_snd, m0); 1875 ifq_set_oactive(&ifp->if_snd); 1876 break; 1877 } 1878 1879 enq++; 1880 ETHER_BPF_MTAP(ifp, m0); 1881 } 1882 1883 if (enq > 0) { 1884 virtqueue_notify(vq, &sc->vtnet_slz); 1885 sc->vtnet_watchdog_timer = VTNET_WATCHDOG_TIMEOUT; 1886 } 1887 } 1888 1889 static void 1890 vtnet_tick(void *xsc) 1891 { 1892 struct vtnet_softc *sc; 1893 1894 sc = xsc; 1895 1896 #if 0 1897 ASSERT_SERIALIZED(&sc->vtnet_slz); 1898 #ifdef VTNET_DEBUG 1899 virtqueue_dump(sc->vtnet_rx_vq); 1900 virtqueue_dump(sc->vtnet_tx_vq); 1901 #endif 1902 1903 vtnet_watchdog(sc); 1904 callout_reset(&sc->vtnet_tick_ch, hz, vtnet_tick, sc); 1905 #endif 1906 } 1907 1908 static void 1909 vtnet_tx_intr_task(void *arg) 1910 { 1911 struct vtnet_softc *sc; 1912 struct ifnet *ifp; 1913 struct ifaltq_subque *ifsq; 1914 1915 sc = arg; 1916 ifp = sc->vtnet_ifp; 1917 ifsq = ifq_get_subq_default(&ifp->if_snd); 1918 1919 next: 1920 // lwkt_serialize_enter(&sc->vtnet_slz); 1921 1922 if ((ifp->if_flags & IFF_RUNNING) == 0) { 1923 vtnet_enable_tx_intr(sc); 1924 // lwkt_serialize_exit(&sc->vtnet_slz); 1925 return; 1926 } 1927 1928 vtnet_txeof(sc); 1929 1930 if (!ifsq_is_empty(ifsq)) 1931 vtnet_start_locked(ifp, ifsq); 1932 1933 if (vtnet_enable_tx_intr(sc) != 0) { 1934 vtnet_disable_tx_intr(sc); 1935 sc->vtnet_stats.tx_task_rescheduled++; 1936 // lwkt_serialize_exit(&sc->vtnet_slz); 1937 goto next; 1938 } 1939 1940 // lwkt_serialize_exit(&sc->vtnet_slz); 1941 } 1942 1943 static int 1944 vtnet_tx_vq_intr(void *xsc) 1945 { 1946 struct vtnet_softc *sc; 1947 1948 sc = xsc; 1949 1950 vtnet_disable_tx_intr(sc); 1951 vtnet_tx_intr_task(sc); 1952 1953 return (1); 1954 } 1955 1956 static void 1957 vtnet_stop(struct vtnet_softc *sc) 1958 { 1959 device_t dev; 1960 struct ifnet *ifp; 1961 1962 dev = sc->vtnet_dev; 1963 ifp = sc->vtnet_ifp; 1964 1965 ASSERT_SERIALIZED(&sc->vtnet_slz); 1966 1967 sc->vtnet_watchdog_timer = 0; 1968 callout_stop(&sc->vtnet_tick_ch); 1969 ifq_clr_oactive(&ifp->if_snd); 1970 ifp->if_flags &= ~(IFF_RUNNING); 1971 1972 vtnet_disable_rx_intr(sc); 1973 vtnet_disable_tx_intr(sc); 1974 1975 /* 1976 * Stop the host VirtIO adapter. Note this will reset the host 1977 * adapter's state back to the pre-initialized state, so in 1978 * order to make the device usable again, we must drive it 1979 * through virtio_reinit() and virtio_reinit_complete(). 1980 */ 1981 virtio_stop(dev); 1982 1983 sc->vtnet_flags &= ~VTNET_FLAG_LINK; 1984 1985 vtnet_free_rx_mbufs(sc); 1986 vtnet_free_tx_mbufs(sc); 1987 } 1988 1989 static int 1990 vtnet_virtio_reinit(struct vtnet_softc *sc) 1991 { 1992 device_t dev; 1993 struct ifnet *ifp; 1994 uint64_t features; 1995 int error; 1996 1997 dev = sc->vtnet_dev; 1998 ifp = sc->vtnet_ifp; 1999 features = sc->vtnet_features; 2000 2001 /* 2002 * Re-negotiate with the host, removing any disabled receive 2003 * features. Transmit features are disabled only on our side 2004 * via if_capenable and if_hwassist. 2005 */ 2006 2007 if (ifp->if_capabilities & IFCAP_RXCSUM) { 2008 if ((ifp->if_capenable & IFCAP_RXCSUM) == 0) 2009 features &= ~VIRTIO_NET_F_GUEST_CSUM; 2010 } 2011 2012 if (ifp->if_capabilities & IFCAP_LRO) { 2013 if ((ifp->if_capenable & IFCAP_LRO) == 0) 2014 features &= ~VTNET_LRO_FEATURES; 2015 } 2016 2017 if (ifp->if_capabilities & IFCAP_VLAN_HWFILTER) { 2018 if ((ifp->if_capenable & IFCAP_VLAN_HWFILTER) == 0) 2019 features &= ~VIRTIO_NET_F_CTRL_VLAN; 2020 } 2021 2022 error = virtio_reinit(dev, features); 2023 if (error) 2024 device_printf(dev, "virtio reinit error %d\n", error); 2025 2026 return (error); 2027 } 2028 2029 static void 2030 vtnet_init_locked(struct vtnet_softc *sc) 2031 { 2032 device_t dev; 2033 struct ifnet *ifp; 2034 int error; 2035 2036 dev = sc->vtnet_dev; 2037 ifp = sc->vtnet_ifp; 2038 2039 ASSERT_SERIALIZED(&sc->vtnet_slz); 2040 2041 if (ifp->if_flags & IFF_RUNNING) 2042 return; 2043 2044 /* Stop host's adapter, cancel any pending I/O. */ 2045 vtnet_stop(sc); 2046 2047 /* Reinitialize the host device. */ 2048 error = vtnet_virtio_reinit(sc); 2049 if (error) { 2050 device_printf(dev, 2051 "reinitialization failed, stopping device...\n"); 2052 vtnet_stop(sc); 2053 return; 2054 } 2055 2056 /* Update host with assigned MAC address. */ 2057 bcopy(IF_LLADDR(ifp), sc->vtnet_hwaddr, ETHER_ADDR_LEN); 2058 vtnet_set_hwaddr(sc); 2059 2060 ifp->if_hwassist = 0; 2061 if (ifp->if_capenable & IFCAP_TXCSUM) 2062 ifp->if_hwassist |= VTNET_CSUM_OFFLOAD; 2063 if (ifp->if_capenable & IFCAP_TSO4) 2064 ifp->if_hwassist |= CSUM_TSO; 2065 2066 error = vtnet_init_rx_vq(sc); 2067 if (error) { 2068 device_printf(dev, 2069 "cannot allocate mbufs for Rx virtqueue\n"); 2070 vtnet_stop(sc); 2071 return; 2072 } 2073 2074 if (sc->vtnet_flags & VTNET_FLAG_CTRL_VQ) { 2075 if (sc->vtnet_flags & VTNET_FLAG_CTRL_RX) { 2076 /* Restore promiscuous and all-multicast modes. */ 2077 vtnet_rx_filter(sc); 2078 2079 /* Restore filtered MAC addresses. */ 2080 vtnet_rx_filter_mac(sc); 2081 } 2082 2083 /* Restore VLAN filters. */ 2084 if (ifp->if_capenable & IFCAP_VLAN_HWFILTER) 2085 vtnet_rx_filter_vlan(sc); 2086 } 2087 2088 { 2089 vtnet_enable_rx_intr(sc); 2090 vtnet_enable_tx_intr(sc); 2091 } 2092 2093 ifp->if_flags |= IFF_RUNNING; 2094 ifq_clr_oactive(&ifp->if_snd); 2095 2096 virtio_reinit_complete(dev); 2097 2098 vtnet_update_link_status(sc); 2099 callout_reset(&sc->vtnet_tick_ch, hz, vtnet_tick, sc); 2100 } 2101 2102 static void 2103 vtnet_init(void *xsc) 2104 { 2105 struct vtnet_softc *sc; 2106 2107 sc = xsc; 2108 2109 lwkt_serialize_enter(&sc->vtnet_slz); 2110 vtnet_init_locked(sc); 2111 lwkt_serialize_exit(&sc->vtnet_slz); 2112 } 2113 2114 static void 2115 vtnet_exec_ctrl_cmd(struct vtnet_softc *sc, void *cookie, 2116 struct sglist *sg, int readable, int writable) 2117 { 2118 struct virtqueue *vq; 2119 void *c; 2120 2121 vq = sc->vtnet_ctrl_vq; 2122 2123 ASSERT_SERIALIZED(&sc->vtnet_slz); 2124 KASSERT(sc->vtnet_flags & VTNET_FLAG_CTRL_VQ, 2125 ("no control virtqueue")); 2126 KASSERT(virtqueue_empty(vq), 2127 ("control command already enqueued")); 2128 2129 if (virtqueue_enqueue(vq, cookie, sg, readable, writable) != 0) 2130 return; 2131 2132 virtqueue_notify(vq, &sc->vtnet_slz); 2133 2134 /* 2135 * Poll until the command is complete. Previously, we would 2136 * sleep until the control virtqueue interrupt handler woke 2137 * us up, but dropping the VTNET_MTX leads to serialization 2138 * difficulties. 2139 * 2140 * Furthermore, it appears QEMU/KVM only allocates three MSIX 2141 * vectors. Two of those vectors are needed for the Rx and Tx 2142 * virtqueues. We do not support sharing both a Vq and config 2143 * changed notification on the same MSIX vector. 2144 */ 2145 c = virtqueue_poll(vq, NULL); 2146 KASSERT(c == cookie, ("unexpected control command response")); 2147 } 2148 2149 static int 2150 vtnet_ctrl_mac_cmd(struct vtnet_softc *sc, uint8_t *hwaddr) 2151 { 2152 struct { 2153 struct virtio_net_ctrl_hdr hdr __aligned(2); 2154 uint8_t pad1; 2155 char aligned_hwaddr[ETHER_ADDR_LEN] __aligned(8); 2156 uint8_t pad2; 2157 uint8_t ack; 2158 } s; 2159 struct sglist_seg segs[3]; 2160 struct sglist sg; 2161 int error; 2162 2163 s.hdr.class = VIRTIO_NET_CTRL_MAC; 2164 s.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET; 2165 s.ack = VIRTIO_NET_ERR; 2166 2167 /* Copy the mac address into physically contiguous memory */ 2168 memcpy(s.aligned_hwaddr, hwaddr, ETHER_ADDR_LEN); 2169 2170 sglist_init(&sg, 3, segs); 2171 error = 0; 2172 error |= sglist_append(&sg, &s.hdr, 2173 sizeof(struct virtio_net_ctrl_hdr)); 2174 error |= sglist_append(&sg, s.aligned_hwaddr, ETHER_ADDR_LEN); 2175 error |= sglist_append(&sg, &s.ack, sizeof(uint8_t)); 2176 KASSERT(error == 0 && sg.sg_nseg == 3, 2177 ("%s: error %d adding set MAC msg to sglist", __func__, error)); 2178 2179 vtnet_exec_ctrl_cmd(sc, &s.ack, &sg, sg.sg_nseg - 1, 1); 2180 2181 return (s.ack == VIRTIO_NET_OK ? 0 : EIO); 2182 } 2183 2184 static void 2185 vtnet_rx_filter(struct vtnet_softc *sc) 2186 { 2187 device_t dev; 2188 struct ifnet *ifp; 2189 2190 dev = sc->vtnet_dev; 2191 ifp = sc->vtnet_ifp; 2192 2193 ASSERT_SERIALIZED(&sc->vtnet_slz); 2194 KASSERT(sc->vtnet_flags & VTNET_FLAG_CTRL_RX, 2195 ("CTRL_RX feature not negotiated")); 2196 2197 if (vtnet_set_promisc(sc, ifp->if_flags & IFF_PROMISC) != 0) 2198 device_printf(dev, "cannot %s promiscuous mode\n", 2199 (ifp->if_flags & IFF_PROMISC) ? "enable" : "disable"); 2200 2201 if (vtnet_set_allmulti(sc, ifp->if_flags & IFF_ALLMULTI) != 0) 2202 device_printf(dev, "cannot %s all-multicast mode\n", 2203 (ifp->if_flags & IFF_ALLMULTI) ? "enable" : "disable"); 2204 } 2205 2206 static int 2207 vtnet_ctrl_rx_cmd(struct vtnet_softc *sc, int cmd, int on) 2208 { 2209 struct sglist_seg segs[3]; 2210 struct sglist sg; 2211 struct { 2212 struct virtio_net_ctrl_hdr hdr __aligned(2); 2213 uint8_t pad1; 2214 uint8_t onoff; 2215 uint8_t pad2; 2216 uint8_t ack; 2217 } s; 2218 int error; 2219 2220 KASSERT(sc->vtnet_flags & VTNET_FLAG_CTRL_RX, 2221 ("%s: CTRL_RX feature not negotiated", __func__)); 2222 2223 s.hdr.class = VIRTIO_NET_CTRL_RX; 2224 s.hdr.cmd = cmd; 2225 s.onoff = !!on; 2226 s.ack = VIRTIO_NET_ERR; 2227 2228 sglist_init(&sg, 3, segs); 2229 error = 0; 2230 error |= sglist_append(&sg, &s.hdr, sizeof(struct virtio_net_ctrl_hdr)); 2231 error |= sglist_append(&sg, &s.onoff, sizeof(uint8_t)); 2232 error |= sglist_append(&sg, &s.ack, sizeof(uint8_t)); 2233 KASSERT(error == 0 && sg.sg_nseg == 3, 2234 ("%s: error %d adding Rx message to sglist", __func__, error)); 2235 2236 vtnet_exec_ctrl_cmd(sc, &s.ack, &sg, sg.sg_nseg - 1, 1); 2237 2238 return (s.ack == VIRTIO_NET_OK ? 0 : EIO); 2239 } 2240 2241 static int 2242 vtnet_set_promisc(struct vtnet_softc *sc, int on) 2243 { 2244 2245 return (vtnet_ctrl_rx_cmd(sc, VIRTIO_NET_CTRL_RX_PROMISC, on)); 2246 } 2247 2248 static int 2249 vtnet_set_allmulti(struct vtnet_softc *sc, int on) 2250 { 2251 2252 return (vtnet_ctrl_rx_cmd(sc, VIRTIO_NET_CTRL_RX_ALLMULTI, on)); 2253 } 2254 2255 static void 2256 vtnet_rx_filter_mac(struct vtnet_softc *sc) 2257 { 2258 struct virtio_net_ctrl_hdr hdr __aligned(2); 2259 struct vtnet_mac_filter *filter; 2260 struct sglist_seg segs[4]; 2261 struct sglist sg; 2262 struct ifnet *ifp; 2263 struct ifaddr *ifa; 2264 struct ifaddr_container *ifac; 2265 struct ifmultiaddr *ifma; 2266 int ucnt, mcnt, promisc, allmulti, error; 2267 uint8_t ack; 2268 2269 ifp = sc->vtnet_ifp; 2270 ucnt = 0; 2271 mcnt = 0; 2272 promisc = 0; 2273 allmulti = 0; 2274 2275 ASSERT_SERIALIZED(&sc->vtnet_slz); 2276 KASSERT(sc->vtnet_flags & VTNET_FLAG_CTRL_RX, 2277 ("%s: CTRL_RX feature not negotiated", __func__)); 2278 2279 /* Use the MAC filtering table allocated in vtnet_attach. */ 2280 filter = sc->vtnet_macfilter; 2281 memset(filter, 0, sizeof(struct vtnet_mac_filter)); 2282 2283 /* Unicast MAC addresses: */ 2284 //if_addr_rlock(ifp); 2285 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 2286 ifa = ifac->ifa; 2287 if (ifa->ifa_addr->sa_family != AF_LINK) 2288 continue; 2289 else if (memcmp(LLADDR((struct sockaddr_dl *)ifa->ifa_addr), 2290 sc->vtnet_hwaddr, ETHER_ADDR_LEN) == 0) 2291 continue; 2292 else if (ucnt == VTNET_MAX_MAC_ENTRIES) { 2293 promisc = 1; 2294 break; 2295 } 2296 2297 bcopy(LLADDR((struct sockaddr_dl *)ifa->ifa_addr), 2298 &filter->vmf_unicast.macs[ucnt], ETHER_ADDR_LEN); 2299 ucnt++; 2300 } 2301 //if_addr_runlock(ifp); 2302 2303 if (promisc != 0) { 2304 filter->vmf_unicast.nentries = 0; 2305 if_printf(ifp, "more than %d MAC addresses assigned, " 2306 "falling back to promiscuous mode\n", 2307 VTNET_MAX_MAC_ENTRIES); 2308 } else 2309 filter->vmf_unicast.nentries = ucnt; 2310 2311 /* Multicast MAC addresses: */ 2312 //if_maddr_rlock(ifp); 2313 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2314 if (ifma->ifma_addr->sa_family != AF_LINK) 2315 continue; 2316 else if (mcnt == VTNET_MAX_MAC_ENTRIES) { 2317 allmulti = 1; 2318 break; 2319 } 2320 2321 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 2322 &filter->vmf_multicast.macs[mcnt], ETHER_ADDR_LEN); 2323 mcnt++; 2324 } 2325 //if_maddr_runlock(ifp); 2326 2327 if (allmulti != 0) { 2328 filter->vmf_multicast.nentries = 0; 2329 if_printf(ifp, "more than %d multicast MAC addresses " 2330 "assigned, falling back to all-multicast mode\n", 2331 VTNET_MAX_MAC_ENTRIES); 2332 } else 2333 filter->vmf_multicast.nentries = mcnt; 2334 2335 if (promisc != 0 && allmulti != 0) 2336 goto out; 2337 2338 hdr.class = VIRTIO_NET_CTRL_MAC; 2339 hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET; 2340 ack = VIRTIO_NET_ERR; 2341 2342 sglist_init(&sg, 4, segs); 2343 error = 0; 2344 error |= sglist_append(&sg, &hdr, sizeof(struct virtio_net_ctrl_hdr)); 2345 error |= sglist_append(&sg, &filter->vmf_unicast, 2346 sizeof(uint32_t) + filter->vmf_unicast.nentries * ETHER_ADDR_LEN); 2347 error |= sglist_append(&sg, &filter->vmf_multicast, 2348 sizeof(uint32_t) + filter->vmf_multicast.nentries * ETHER_ADDR_LEN); 2349 error |= sglist_append(&sg, &ack, sizeof(uint8_t)); 2350 KASSERT(error == 0 && sg.sg_nseg == 4, 2351 ("%s: error %d adding MAC filter msg to sglist", __func__, error)); 2352 2353 vtnet_exec_ctrl_cmd(sc, &ack, &sg, sg.sg_nseg - 1, 1); 2354 2355 if (ack != VIRTIO_NET_OK) 2356 if_printf(ifp, "error setting host MAC filter table\n"); 2357 2358 out: 2359 if (promisc != 0 && vtnet_set_promisc(sc, 1) != 0) 2360 if_printf(ifp, "cannot enable promiscuous mode\n"); 2361 if (allmulti != 0 && vtnet_set_allmulti(sc, 1) != 0) 2362 if_printf(ifp, "cannot enable all-multicast mode\n"); 2363 } 2364 2365 static int 2366 vtnet_exec_vlan_filter(struct vtnet_softc *sc, int add, uint16_t tag) 2367 { 2368 struct sglist_seg segs[3]; 2369 struct sglist sg; 2370 struct { 2371 struct virtio_net_ctrl_hdr hdr __aligned(2); 2372 uint8_t pad1; 2373 uint16_t tag; 2374 uint8_t pad2; 2375 uint8_t ack; 2376 } s; 2377 int error; 2378 2379 s.hdr.class = VIRTIO_NET_CTRL_VLAN; 2380 s.hdr.cmd = add ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL; 2381 s.tag = tag; 2382 s.ack = VIRTIO_NET_ERR; 2383 2384 sglist_init(&sg, 3, segs); 2385 error = 0; 2386 error |= sglist_append(&sg, &s.hdr, sizeof(struct virtio_net_ctrl_hdr)); 2387 error |= sglist_append(&sg, &s.tag, sizeof(uint16_t)); 2388 error |= sglist_append(&sg, &s.ack, sizeof(uint8_t)); 2389 KASSERT(error == 0 && sg.sg_nseg == 3, 2390 ("%s: error %d adding VLAN message to sglist", __func__, error)); 2391 2392 vtnet_exec_ctrl_cmd(sc, &s.ack, &sg, sg.sg_nseg - 1, 1); 2393 2394 return (s.ack == VIRTIO_NET_OK ? 0 : EIO); 2395 } 2396 2397 static void 2398 vtnet_rx_filter_vlan(struct vtnet_softc *sc) 2399 { 2400 uint32_t w; 2401 uint16_t tag; 2402 int i, bit, nvlans; 2403 2404 ASSERT_SERIALIZED(&sc->vtnet_slz); 2405 KASSERT(sc->vtnet_flags & VTNET_FLAG_VLAN_FILTER, 2406 ("%s: VLAN_FILTER feature not negotiated", __func__)); 2407 2408 nvlans = sc->vtnet_nvlans; 2409 2410 /* Enable the filter for each configured VLAN. */ 2411 for (i = 0; i < VTNET_VLAN_SHADOW_SIZE && nvlans > 0; i++) { 2412 w = sc->vtnet_vlan_shadow[i]; 2413 while ((bit = ffs(w) - 1) != -1) { 2414 w &= ~(1 << bit); 2415 tag = sizeof(w) * CHAR_BIT * i + bit; 2416 nvlans--; 2417 2418 if (vtnet_exec_vlan_filter(sc, 1, tag) != 0) { 2419 device_printf(sc->vtnet_dev, 2420 "cannot enable VLAN %d filter\n", tag); 2421 } 2422 } 2423 } 2424 2425 KASSERT(nvlans == 0, ("VLAN count incorrect")); 2426 } 2427 2428 static void 2429 vtnet_update_vlan_filter(struct vtnet_softc *sc, int add, uint16_t tag) 2430 { 2431 struct ifnet *ifp; 2432 int idx, bit; 2433 2434 ifp = sc->vtnet_ifp; 2435 idx = (tag >> 5) & 0x7F; 2436 bit = tag & 0x1F; 2437 2438 if (tag == 0 || tag > 4095) 2439 return; 2440 2441 lwkt_serialize_enter(&sc->vtnet_slz); 2442 2443 /* Update shadow VLAN table. */ 2444 if (add) { 2445 sc->vtnet_nvlans++; 2446 sc->vtnet_vlan_shadow[idx] |= (1 << bit); 2447 } else { 2448 sc->vtnet_nvlans--; 2449 sc->vtnet_vlan_shadow[idx] &= ~(1 << bit); 2450 } 2451 2452 if (ifp->if_capenable & IFCAP_VLAN_HWFILTER && 2453 vtnet_exec_vlan_filter(sc, add, tag) != 0) { 2454 device_printf(sc->vtnet_dev, 2455 "cannot %s VLAN %d %s the host filter table\n", 2456 add ? "add" : "remove", tag, add ? "to" : "from"); 2457 } 2458 2459 lwkt_serialize_exit(&sc->vtnet_slz); 2460 } 2461 2462 static void 2463 vtnet_register_vlan(void *arg, struct ifnet *ifp, uint16_t tag) 2464 { 2465 2466 if (ifp->if_softc != arg) 2467 return; 2468 2469 vtnet_update_vlan_filter(arg, 1, tag); 2470 } 2471 2472 static void 2473 vtnet_unregister_vlan(void *arg, struct ifnet *ifp, uint16_t tag) 2474 { 2475 2476 if (ifp->if_softc != arg) 2477 return; 2478 2479 vtnet_update_vlan_filter(arg, 0, tag); 2480 } 2481 2482 static int 2483 vtnet_ifmedia_upd(struct ifnet *ifp) 2484 { 2485 struct vtnet_softc *sc; 2486 struct ifmedia *ifm; 2487 2488 sc = ifp->if_softc; 2489 ifm = &sc->vtnet_media; 2490 2491 if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER) 2492 return (EINVAL); 2493 2494 return (0); 2495 } 2496 2497 static void 2498 vtnet_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr) 2499 { 2500 struct vtnet_softc *sc; 2501 2502 sc = ifp->if_softc; 2503 2504 ifmr->ifm_status = IFM_AVALID; 2505 ifmr->ifm_active = IFM_ETHER; 2506 2507 lwkt_serialize_enter(&sc->vtnet_slz); 2508 if (vtnet_is_link_up(sc) != 0) { 2509 ifmr->ifm_status |= IFM_ACTIVE; 2510 ifmr->ifm_active |= VTNET_MEDIATYPE; 2511 } else 2512 ifmr->ifm_active |= IFM_NONE; 2513 lwkt_serialize_exit(&sc->vtnet_slz); 2514 } 2515 2516 static void 2517 vtnet_add_statistics(struct vtnet_softc *sc) 2518 { 2519 device_t dev; 2520 struct vtnet_statistics *stats; 2521 struct sysctl_ctx_list *ctx; 2522 struct sysctl_oid *tree; 2523 struct sysctl_oid_list *child; 2524 2525 dev = sc->vtnet_dev; 2526 stats = &sc->vtnet_stats; 2527 ctx = device_get_sysctl_ctx(dev); 2528 tree = device_get_sysctl_tree(dev); 2529 child = SYSCTL_CHILDREN(tree); 2530 2531 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "mbuf_alloc_failed", 2532 CTLFLAG_RD, &stats->mbuf_alloc_failed, 0, 2533 "Mbuf cluster allocation failures"); 2534 2535 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_frame_too_large", 2536 CTLFLAG_RD, &stats->rx_frame_too_large, 0, 2537 "Received frame larger than the mbuf chain"); 2538 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_enq_replacement_failed", 2539 CTLFLAG_RD, &stats->rx_enq_replacement_failed, 0, 2540 "Enqueuing the replacement receive mbuf failed"); 2541 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_mergeable_failed", 2542 CTLFLAG_RD, &stats->rx_mergeable_failed, 0, 2543 "Mergeable buffers receive failures"); 2544 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_csum_bad_ethtype", 2545 CTLFLAG_RD, &stats->rx_csum_bad_ethtype, 0, 2546 "Received checksum offloaded buffer with unsupported " 2547 "Ethernet type"); 2548 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_csum_bad_ipproto", 2549 CTLFLAG_RD, &stats->rx_csum_bad_ipproto, 0, 2550 "Received checksum offloaded buffer with incorrect IP protocol"); 2551 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_csum_bad_offset", 2552 CTLFLAG_RD, &stats->rx_csum_bad_offset, 0, 2553 "Received checksum offloaded buffer with incorrect offset"); 2554 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_csum_failed", 2555 CTLFLAG_RD, &stats->rx_csum_failed, 0, 2556 "Received buffer checksum offload failed"); 2557 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_csum_offloaded", 2558 CTLFLAG_RD, &stats->rx_csum_offloaded, 0, 2559 "Received buffer checksum offload succeeded"); 2560 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_task_rescheduled", 2561 CTLFLAG_RD, &stats->rx_task_rescheduled, 0, 2562 "Times the receive interrupt task rescheduled itself"); 2563 2564 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_csum_bad_ethtype", 2565 CTLFLAG_RD, &stats->tx_csum_bad_ethtype, 0, 2566 "Aborted transmit of checksum offloaded buffer with unknown " 2567 "Ethernet type"); 2568 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_tso_bad_ethtype", 2569 CTLFLAG_RD, &stats->tx_tso_bad_ethtype, 0, 2570 "Aborted transmit of TSO buffer with unknown Ethernet type"); 2571 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_defragged", 2572 CTLFLAG_RD, &stats->tx_defragged, 0, 2573 "Transmit mbufs defragged"); 2574 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_defrag_failed", 2575 CTLFLAG_RD, &stats->tx_defrag_failed, 0, 2576 "Aborted transmit of buffer because defrag failed"); 2577 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_csum_offloaded", 2578 CTLFLAG_RD, &stats->tx_csum_offloaded, 0, 2579 "Offloaded checksum of transmitted buffer"); 2580 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_tso_offloaded", 2581 CTLFLAG_RD, &stats->tx_tso_offloaded, 0, 2582 "Segmentation offload of transmitted buffer"); 2583 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_task_rescheduled", 2584 CTLFLAG_RD, &stats->tx_task_rescheduled, 0, 2585 "Times the transmit interrupt task rescheduled itself"); 2586 } 2587 2588 static int 2589 vtnet_enable_rx_intr(struct vtnet_softc *sc) 2590 { 2591 2592 return (virtqueue_enable_intr(sc->vtnet_rx_vq)); 2593 } 2594 2595 static void 2596 vtnet_disable_rx_intr(struct vtnet_softc *sc) 2597 { 2598 2599 virtqueue_disable_intr(sc->vtnet_rx_vq); 2600 } 2601 2602 static int 2603 vtnet_enable_tx_intr(struct vtnet_softc *sc) 2604 { 2605 2606 #ifdef VTNET_TX_INTR_MODERATION 2607 return (0); 2608 #else 2609 return (virtqueue_enable_intr(sc->vtnet_tx_vq)); 2610 #endif 2611 } 2612 2613 static void 2614 vtnet_disable_tx_intr(struct vtnet_softc *sc) 2615 { 2616 2617 virtqueue_disable_intr(sc->vtnet_tx_vq); 2618 } 2619