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 if ((sc->vtnet_flags & VTNET_FLAG_MAC) == 0) { 326 lwkt_serialize_enter(&sc->vtnet_slz); 327 vtnet_set_hwaddr(sc); 328 lwkt_serialize_exit(&sc->vtnet_slz); 329 } 330 331 /* 332 * Device defaults to promiscuous mode for backwards 333 * compatibility. Turn it off if possible. 334 */ 335 if (sc->vtnet_flags & VTNET_FLAG_CTRL_RX) { 336 lwkt_serialize_enter(&sc->vtnet_slz); 337 if (vtnet_set_promisc(sc, 0) != 0) { 338 sc->vtnet_ifp->if_flags |= IFF_PROMISC; 339 device_printf(dev, 340 "cannot disable promiscuous mode\n"); 341 } 342 lwkt_serialize_exit(&sc->vtnet_slz); 343 } else 344 sc->vtnet_ifp->if_flags |= IFF_PROMISC; 345 346 fail: 347 if (error) 348 vtnet_detach(dev); 349 350 return (error); 351 } 352 353 static int 354 vtnet_detach(device_t dev) 355 { 356 struct vtnet_softc *sc; 357 struct ifnet *ifp; 358 359 sc = device_get_softc(dev); 360 ifp = sc->vtnet_ifp; 361 362 if (device_is_attached(dev)) { 363 lwkt_serialize_enter(&sc->vtnet_slz); 364 vtnet_stop(sc); 365 lwkt_serialize_exit(&sc->vtnet_slz); 366 367 callout_stop(&sc->vtnet_tick_ch); 368 taskqueue_drain(taskqueue_swi, &sc->vtnet_cfgchg_task); 369 370 ether_ifdetach(ifp); 371 } 372 373 if (sc->vtnet_vlan_attach != NULL) { 374 EVENTHANDLER_DEREGISTER(vlan_config, sc->vtnet_vlan_attach); 375 sc->vtnet_vlan_attach = NULL; 376 } 377 if (sc->vtnet_vlan_detach != NULL) { 378 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vtnet_vlan_detach); 379 sc->vtnet_vlan_detach = NULL; 380 } 381 382 if (ifp) { 383 if_free(ifp); 384 sc->vtnet_ifp = NULL; 385 } 386 387 if (sc->vtnet_rx_vq != NULL) 388 vtnet_free_rx_mbufs(sc); 389 if (sc->vtnet_tx_vq != NULL) 390 vtnet_free_tx_mbufs(sc); 391 if (sc->vtnet_ctrl_vq != NULL) 392 vtnet_free_ctrl_vq(sc); 393 394 if (sc->vtnet_txhdrarea != NULL) { 395 contigfree(sc->vtnet_txhdrarea, 396 sc->vtnet_txhdrcount * sizeof(struct vtnet_tx_header), 397 M_VTNET); 398 sc->vtnet_txhdrarea = NULL; 399 } 400 SLIST_INIT(&sc->vtnet_txhdr_free); 401 if (sc->vtnet_macfilter != NULL) { 402 contigfree(sc->vtnet_macfilter, 403 sizeof(struct vtnet_mac_filter), M_DEVBUF); 404 sc->vtnet_macfilter = NULL; 405 } 406 407 ifmedia_removeall(&sc->vtnet_media); 408 409 return (0); 410 } 411 412 static int 413 vtnet_suspend(device_t dev) 414 { 415 struct vtnet_softc *sc; 416 417 sc = device_get_softc(dev); 418 419 lwkt_serialize_enter(&sc->vtnet_slz); 420 vtnet_stop(sc); 421 sc->vtnet_flags |= VTNET_FLAG_SUSPENDED; 422 lwkt_serialize_exit(&sc->vtnet_slz); 423 424 return (0); 425 } 426 427 static int 428 vtnet_resume(device_t dev) 429 { 430 struct vtnet_softc *sc; 431 struct ifnet *ifp; 432 433 sc = device_get_softc(dev); 434 ifp = sc->vtnet_ifp; 435 436 lwkt_serialize_enter(&sc->vtnet_slz); 437 if (ifp->if_flags & IFF_UP) 438 vtnet_init_locked(sc); 439 sc->vtnet_flags &= ~VTNET_FLAG_SUSPENDED; 440 lwkt_serialize_exit(&sc->vtnet_slz); 441 442 return (0); 443 } 444 445 static int 446 vtnet_shutdown(device_t dev) 447 { 448 449 /* 450 * Suspend already does all of what we need to 451 * do here; we just never expect to be resumed. 452 */ 453 return (vtnet_suspend(dev)); 454 } 455 456 static int 457 vtnet_config_change(device_t dev) 458 { 459 struct vtnet_softc *sc; 460 461 sc = device_get_softc(dev); 462 463 taskqueue_enqueue(taskqueue_thread[mycpuid], &sc->vtnet_cfgchg_task); 464 465 return (1); 466 } 467 468 static void 469 vtnet_negotiate_features(struct vtnet_softc *sc) 470 { 471 device_t dev; 472 uint64_t mask, features; 473 474 dev = sc->vtnet_dev; 475 mask = 0; 476 477 if (vtnet_csum_disable) 478 mask |= VIRTIO_NET_F_CSUM | VIRTIO_NET_F_GUEST_CSUM; 479 480 /* 481 * XXX DragonFly doesn't support receive checksum offload for ipv6 yet, 482 * hence always disable the virtio feature for now. 483 * XXX We need to support the DynOffload feature, in order to 484 * dynamically enable/disable this feature. 485 */ 486 mask |= VIRTIO_NET_F_GUEST_CSUM; 487 488 /* 489 * TSO is only available when the tx checksum offload feature is also 490 * negotiated. 491 */ 492 if (vtnet_csum_disable || vtnet_tso_disable) 493 mask |= VIRTIO_NET_F_HOST_TSO4 | VIRTIO_NET_F_HOST_TSO6 | 494 VIRTIO_NET_F_HOST_ECN; 495 496 if (vtnet_lro_disable) 497 mask |= VTNET_LRO_FEATURES; 498 499 features = VTNET_FEATURES & ~mask; 500 features |= VIRTIO_F_NOTIFY_ON_EMPTY; 501 features |= VIRTIO_F_ANY_LAYOUT; 502 sc->vtnet_features = virtio_negotiate_features(dev, features); 503 504 if (virtio_with_feature(dev, VTNET_LRO_FEATURES) && 505 virtio_with_feature(dev, VIRTIO_NET_F_MRG_RXBUF) == 0) { 506 /* 507 * LRO without mergeable buffers requires special care. This 508 * is not ideal because every receive buffer must be large 509 * enough to hold the maximum TCP packet, the Ethernet header, 510 * and the header. This requires up to 34 descriptors with 511 * MCLBYTES clusters. If we do not have indirect descriptors, 512 * LRO is disabled since the virtqueue will not contain very 513 * many receive buffers. 514 */ 515 if (!virtio_with_feature(dev, VIRTIO_RING_F_INDIRECT_DESC)) { 516 device_printf(dev, 517 "LRO disabled due to both mergeable buffers and " 518 "indirect descriptors not negotiated\n"); 519 520 features &= ~VTNET_LRO_FEATURES; 521 sc->vtnet_features = 522 virtio_negotiate_features(dev, features); 523 } else 524 sc->vtnet_flags |= VTNET_FLAG_LRO_NOMRG; 525 } 526 } 527 528 static int 529 vtnet_alloc_virtqueues(struct vtnet_softc *sc) 530 { 531 device_t dev; 532 struct vq_alloc_info vq_info[3]; 533 int nvqs; 534 535 dev = sc->vtnet_dev; 536 nvqs = 2; 537 538 /* 539 * Indirect descriptors are not needed for the Rx 540 * virtqueue when mergeable buffers are negotiated. 541 * The header is placed inline with the data, not 542 * in a separate descriptor, and mbuf clusters are 543 * always physically contiguous. 544 */ 545 if ((sc->vtnet_flags & VTNET_FLAG_MRG_RXBUFS) == 0) { 546 sc->vtnet_rx_nsegs = (sc->vtnet_flags & VTNET_FLAG_LRO_NOMRG) ? 547 VTNET_MAX_RX_SEGS : VTNET_MIN_RX_SEGS; 548 } else 549 sc->vtnet_rx_nsegs = VTNET_MRG_RX_SEGS; 550 551 if (virtio_with_feature(dev, VIRTIO_NET_F_HOST_TSO4) || 552 virtio_with_feature(dev, VIRTIO_NET_F_HOST_TSO6)) 553 sc->vtnet_tx_nsegs = VTNET_MAX_TX_SEGS; 554 else 555 sc->vtnet_tx_nsegs = VTNET_MIN_TX_SEGS; 556 557 VQ_ALLOC_INFO_INIT(&vq_info[0], sc->vtnet_rx_nsegs, 558 vtnet_rx_vq_intr, sc, &sc->vtnet_rx_vq, 559 "%s receive", device_get_nameunit(dev)); 560 561 VQ_ALLOC_INFO_INIT(&vq_info[1], sc->vtnet_tx_nsegs, 562 vtnet_tx_vq_intr, sc, &sc->vtnet_tx_vq, 563 "%s transmit", device_get_nameunit(dev)); 564 565 if (sc->vtnet_flags & VTNET_FLAG_CTRL_VQ) { 566 nvqs++; 567 568 VQ_ALLOC_INFO_INIT(&vq_info[2], 0, NULL, NULL, 569 &sc->vtnet_ctrl_vq, "%s control", 570 device_get_nameunit(dev)); 571 } 572 573 return (virtio_alloc_virtqueues(dev, 0, nvqs, vq_info)); 574 } 575 576 static int 577 vtnet_setup_interface(struct vtnet_softc *sc) 578 { 579 device_t dev; 580 struct ifnet *ifp; 581 int i; 582 583 dev = sc->vtnet_dev; 584 585 ifp = sc->vtnet_ifp = if_alloc(IFT_ETHER); 586 if (ifp == NULL) { 587 device_printf(dev, "cannot allocate ifnet structure\n"); 588 return (ENOSPC); 589 } 590 591 ifp->if_softc = sc; 592 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 593 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 594 ifp->if_init = vtnet_init; 595 ifp->if_start = vtnet_start; 596 ifp->if_ioctl = vtnet_ioctl; 597 598 sc->vtnet_rx_process_limit = virtqueue_size(sc->vtnet_rx_vq); 599 sc->vtnet_tx_size = virtqueue_size(sc->vtnet_tx_vq); 600 if (sc->vtnet_flags & VTNET_FLAG_INDIRECT) 601 sc->vtnet_txhdrcount = sc->vtnet_tx_size; 602 else 603 sc->vtnet_txhdrcount = (sc->vtnet_tx_size / 2) + 1; 604 sc->vtnet_txhdrarea = contigmalloc( 605 sc->vtnet_txhdrcount * sizeof(struct vtnet_tx_header), 606 M_VTNET, M_WAITOK, 0, BUS_SPACE_MAXADDR, 4, 0); 607 if (sc->vtnet_txhdrarea == NULL) { 608 device_printf(dev, "cannot contigmalloc the tx headers\n"); 609 return (ENOMEM); 610 } 611 for (i = 0; i < sc->vtnet_txhdrcount; i++) 612 vtnet_enqueue_txhdr(sc, &sc->vtnet_txhdrarea[i]); 613 sc->vtnet_macfilter = contigmalloc( 614 sizeof(struct vtnet_mac_filter), 615 M_DEVBUF, M_WAITOK, 0, BUS_SPACE_MAXADDR, 4, 0); 616 if (sc->vtnet_macfilter == NULL) { 617 device_printf(dev, 618 "cannot contigmalloc the mac filter table\n"); 619 return (ENOMEM); 620 } 621 ifq_set_maxlen(&ifp->if_snd, sc->vtnet_tx_size - 1); 622 ifq_set_ready(&ifp->if_snd); 623 624 ether_ifattach(ifp, sc->vtnet_hwaddr, NULL); 625 626 /* Tell the upper layer(s) we support long frames. */ 627 ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header); 628 ifp->if_capabilities |= IFCAP_JUMBO_MTU | IFCAP_VLAN_MTU; 629 630 if (virtio_with_feature(dev, VIRTIO_NET_F_CSUM)) { 631 ifp->if_capabilities |= IFCAP_TXCSUM; 632 633 if (virtio_with_feature(dev, VIRTIO_NET_F_HOST_TSO4)) 634 ifp->if_capabilities |= IFCAP_TSO4; 635 if (virtio_with_feature(dev, VIRTIO_NET_F_HOST_TSO6)) 636 ifp->if_capabilities |= IFCAP_TSO6; 637 if (ifp->if_capabilities & IFCAP_TSO) 638 ifp->if_capabilities |= IFCAP_VLAN_HWTSO; 639 640 if (virtio_with_feature(dev, VIRTIO_NET_F_HOST_ECN)) 641 sc->vtnet_flags |= VTNET_FLAG_TSO_ECN; 642 } 643 644 if (virtio_with_feature(dev, VIRTIO_NET_F_GUEST_CSUM)) 645 ifp->if_capabilities |= IFCAP_RXCSUM; 646 647 #if 0 /* IFCAP_LRO doesn't exist in DragonFly. */ 648 if (virtio_with_feature(dev, VIRTIO_NET_F_GUEST_TSO4) || 649 virtio_with_feature(dev, VIRTIO_NET_F_GUEST_TSO6)) 650 ifp->if_capabilities |= IFCAP_LRO; 651 #endif 652 653 if ((ifp->if_capabilities & IFCAP_HWCSUM) == IFCAP_HWCSUM) { 654 /* 655 * VirtIO does not support VLAN tagging, but we can fake 656 * it by inserting and removing the 802.1Q header during 657 * transmit and receive. We are then able to do checksum 658 * offloading of VLAN frames. 659 */ 660 ifp->if_capabilities |= 661 IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_HWCSUM; 662 } 663 664 ifp->if_capenable = ifp->if_capabilities; 665 666 /* 667 * Capabilities after here are not enabled by default. 668 */ 669 670 if (sc->vtnet_flags & VTNET_FLAG_VLAN_FILTER) { 671 ifp->if_capabilities |= IFCAP_VLAN_HWFILTER; 672 673 sc->vtnet_vlan_attach = EVENTHANDLER_REGISTER(vlan_config, 674 vtnet_register_vlan, sc, EVENTHANDLER_PRI_FIRST); 675 sc->vtnet_vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, 676 vtnet_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); 677 } 678 679 return (0); 680 } 681 682 static void 683 vtnet_set_hwaddr(struct vtnet_softc *sc) 684 { 685 device_t dev; 686 687 dev = sc->vtnet_dev; 688 689 if ((sc->vtnet_flags & VTNET_FLAG_CTRL_MAC) && 690 (sc->vtnet_flags & VTNET_FLAG_CTRL_RX)) { 691 if (vtnet_ctrl_mac_cmd(sc, sc->vtnet_hwaddr) != 0) 692 device_printf(dev, "unable to set MAC address\n"); 693 } else if (sc->vtnet_flags & VTNET_FLAG_MAC) { 694 virtio_write_device_config(dev, 695 offsetof(struct virtio_net_config, mac), 696 sc->vtnet_hwaddr, ETHER_ADDR_LEN); 697 } 698 } 699 700 static void 701 vtnet_get_hwaddr(struct vtnet_softc *sc) 702 { 703 device_t dev; 704 705 dev = sc->vtnet_dev; 706 707 if ((sc->vtnet_flags & VTNET_FLAG_MAC) == 0) { 708 /* 709 * Generate a random locally administered unicast address. 710 * 711 * It would be nice to generate the same MAC address across 712 * reboots, but it seems all the hosts currently available 713 * support the MAC feature, so this isn't too important. 714 */ 715 sc->vtnet_hwaddr[0] = 0xB2; 716 karc4rand(&sc->vtnet_hwaddr[1], ETHER_ADDR_LEN - 1); 717 return; 718 } 719 720 virtio_read_device_config(dev, 721 offsetof(struct virtio_net_config, mac), 722 sc->vtnet_hwaddr, ETHER_ADDR_LEN); 723 } 724 725 static int 726 vtnet_is_link_up(struct vtnet_softc *sc) 727 { 728 device_t dev; 729 struct ifnet *ifp; 730 uint16_t status; 731 732 dev = sc->vtnet_dev; 733 ifp = sc->vtnet_ifp; 734 735 ASSERT_SERIALIZED(&sc->vtnet_slz); 736 737 if (virtio_with_feature(dev, VIRTIO_NET_F_STATUS)) { 738 status = virtio_read_dev_config_2(dev, 739 offsetof(struct virtio_net_config, status)); 740 } else { 741 status = VIRTIO_NET_S_LINK_UP; 742 } 743 744 return ((status & VIRTIO_NET_S_LINK_UP) != 0); 745 } 746 747 static void 748 vtnet_update_link_status(struct vtnet_softc *sc) 749 { 750 device_t dev; 751 struct ifnet *ifp; 752 struct ifaltq_subque *ifsq; 753 int link; 754 755 dev = sc->vtnet_dev; 756 ifp = sc->vtnet_ifp; 757 ifsq = ifq_get_subq_default(&ifp->if_snd); 758 759 link = vtnet_is_link_up(sc); 760 761 if (link && ((sc->vtnet_flags & VTNET_FLAG_LINK) == 0)) { 762 sc->vtnet_flags |= VTNET_FLAG_LINK; 763 if (bootverbose) 764 device_printf(dev, "Link is up\n"); 765 ifp->if_link_state = LINK_STATE_UP; 766 if_link_state_change(ifp); 767 if (!ifsq_is_empty(ifsq)) 768 vtnet_start_locked(ifp, ifsq); 769 } else if (!link && (sc->vtnet_flags & VTNET_FLAG_LINK)) { 770 sc->vtnet_flags &= ~VTNET_FLAG_LINK; 771 if (bootverbose) 772 device_printf(dev, "Link is down\n"); 773 774 ifp->if_link_state = LINK_STATE_DOWN; 775 if_link_state_change(ifp); 776 } 777 } 778 779 #if 0 780 static void 781 vtnet_watchdog(struct vtnet_softc *sc) 782 { 783 struct ifnet *ifp; 784 785 ifp = sc->vtnet_ifp; 786 787 #ifdef VTNET_TX_INTR_MODERATION 788 vtnet_txeof(sc); 789 #endif 790 791 if (sc->vtnet_watchdog_timer == 0 || --sc->vtnet_watchdog_timer) 792 return; 793 794 if_printf(ifp, "watchdog timeout -- resetting\n"); 795 #ifdef VTNET_DEBUG 796 virtqueue_dump(sc->vtnet_tx_vq); 797 #endif 798 ifp->if_oerrors++; 799 ifp->if_flags &= ~IFF_RUNNING; 800 vtnet_init_locked(sc); 801 } 802 #endif 803 804 static void 805 vtnet_config_change_task(void *arg, int pending) 806 { 807 struct vtnet_softc *sc; 808 809 sc = arg; 810 811 lwkt_serialize_enter(&sc->vtnet_slz); 812 vtnet_update_link_status(sc); 813 lwkt_serialize_exit(&sc->vtnet_slz); 814 } 815 816 static int 817 vtnet_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data,struct ucred *cr) 818 { 819 struct vtnet_softc *sc; 820 struct ifreq *ifr; 821 int reinit, mask, error; 822 823 sc = ifp->if_softc; 824 ifr = (struct ifreq *) data; 825 reinit = 0; 826 error = 0; 827 828 switch (cmd) { 829 case SIOCSIFMTU: 830 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > VTNET_MAX_MTU) 831 error = EINVAL; 832 else if (ifp->if_mtu != ifr->ifr_mtu) { 833 lwkt_serialize_enter(&sc->vtnet_slz); 834 error = vtnet_change_mtu(sc, ifr->ifr_mtu); 835 lwkt_serialize_exit(&sc->vtnet_slz); 836 } 837 break; 838 839 case SIOCSIFFLAGS: 840 lwkt_serialize_enter(&sc->vtnet_slz); 841 if ((ifp->if_flags & IFF_UP) == 0) { 842 if (ifp->if_flags & IFF_RUNNING) 843 vtnet_stop(sc); 844 } else if (ifp->if_flags & IFF_RUNNING) { 845 if ((ifp->if_flags ^ sc->vtnet_if_flags) & 846 (IFF_PROMISC | IFF_ALLMULTI)) { 847 if (sc->vtnet_flags & VTNET_FLAG_CTRL_RX) 848 vtnet_rx_filter(sc); 849 else 850 error = ENOTSUP; 851 } 852 } else 853 vtnet_init_locked(sc); 854 855 if (error == 0) 856 sc->vtnet_if_flags = ifp->if_flags; 857 lwkt_serialize_exit(&sc->vtnet_slz); 858 break; 859 860 case SIOCADDMULTI: 861 case SIOCDELMULTI: 862 lwkt_serialize_enter(&sc->vtnet_slz); 863 if ((sc->vtnet_flags & VTNET_FLAG_CTRL_RX) && 864 (ifp->if_flags & IFF_RUNNING)) 865 vtnet_rx_filter_mac(sc); 866 lwkt_serialize_exit(&sc->vtnet_slz); 867 break; 868 869 case SIOCSIFMEDIA: 870 case SIOCGIFMEDIA: 871 error = ifmedia_ioctl(ifp, ifr, &sc->vtnet_media, cmd); 872 break; 873 874 case SIOCSIFCAP: 875 mask = ifr->ifr_reqcap ^ ifp->if_capenable; 876 877 lwkt_serialize_enter(&sc->vtnet_slz); 878 879 if (mask & IFCAP_TXCSUM) { 880 ifp->if_capenable ^= IFCAP_TXCSUM; 881 if (ifp->if_capenable & IFCAP_TXCSUM) 882 ifp->if_hwassist |= VTNET_CSUM_OFFLOAD; 883 else 884 ifp->if_hwassist &= ~VTNET_CSUM_OFFLOAD; 885 } 886 887 if (mask & IFCAP_TSO4) { 888 ifp->if_capenable ^= IFCAP_TSO4; 889 if (ifp->if_capenable & IFCAP_TSO4) 890 ifp->if_hwassist |= CSUM_TSO; 891 else 892 ifp->if_hwassist &= ~CSUM_TSO; 893 } 894 895 if (mask & IFCAP_RXCSUM) { 896 ifp->if_capenable ^= IFCAP_RXCSUM; 897 reinit = 1; 898 } 899 900 #if 0 /* IFCAP_LRO doesn't exist in DragonFly. */ 901 if (mask & IFCAP_LRO) { 902 ifp->if_capenable ^= IFCAP_LRO; 903 reinit = 1; 904 } 905 #endif 906 907 if (mask & IFCAP_VLAN_HWFILTER) { 908 ifp->if_capenable ^= IFCAP_VLAN_HWFILTER; 909 reinit = 1; 910 } 911 912 if (mask & IFCAP_VLAN_HWTSO) 913 ifp->if_capenable ^= IFCAP_VLAN_HWTSO; 914 915 if (mask & IFCAP_VLAN_HWTAGGING) 916 ifp->if_capenable ^= IFCAP_VLAN_HWTAGGING; 917 918 if (reinit && (ifp->if_flags & IFF_RUNNING)) { 919 ifp->if_flags &= ~IFF_RUNNING; 920 vtnet_init_locked(sc); 921 } 922 //VLAN_CAPABILITIES(ifp); 923 924 lwkt_serialize_exit(&sc->vtnet_slz); 925 break; 926 927 default: 928 error = ether_ioctl(ifp, cmd, data); 929 break; 930 } 931 932 return (error); 933 } 934 935 static int 936 vtnet_change_mtu(struct vtnet_softc *sc, int new_mtu) 937 { 938 struct ifnet *ifp; 939 int new_frame_size, clsize; 940 941 ifp = sc->vtnet_ifp; 942 943 if ((sc->vtnet_flags & VTNET_FLAG_MRG_RXBUFS) == 0) { 944 new_frame_size = sizeof(struct vtnet_rx_header) + 945 sizeof(struct ether_vlan_header) + new_mtu; 946 947 if (new_frame_size > MJUM9BYTES) 948 return (EINVAL); 949 950 if (new_frame_size <= MCLBYTES) 951 clsize = MCLBYTES; 952 else 953 clsize = MJUM9BYTES; 954 } else { 955 new_frame_size = sizeof(struct virtio_net_hdr_mrg_rxbuf) + 956 sizeof(struct ether_vlan_header) + new_mtu; 957 958 if (new_frame_size <= MCLBYTES) 959 clsize = MCLBYTES; 960 else 961 clsize = MJUMPAGESIZE; 962 } 963 964 sc->vtnet_rx_mbuf_size = clsize; 965 sc->vtnet_rx_mbuf_count = VTNET_NEEDED_RX_MBUFS(sc); 966 KASSERT(sc->vtnet_rx_mbuf_count < VTNET_MAX_RX_SEGS, 967 ("too many rx mbufs: %d", sc->vtnet_rx_mbuf_count)); 968 969 ifp->if_mtu = new_mtu; 970 971 if (ifp->if_flags & IFF_RUNNING) { 972 ifp->if_flags &= ~IFF_RUNNING; 973 vtnet_init_locked(sc); 974 } 975 976 return (0); 977 } 978 979 static int 980 vtnet_init_rx_vq(struct vtnet_softc *sc) 981 { 982 struct virtqueue *vq; 983 int nbufs, error; 984 985 vq = sc->vtnet_rx_vq; 986 nbufs = 0; 987 error = ENOSPC; 988 989 while (!virtqueue_full(vq)) { 990 if ((error = vtnet_newbuf(sc)) != 0) 991 break; 992 nbufs++; 993 } 994 995 if (nbufs > 0) { 996 virtqueue_notify(vq, &sc->vtnet_slz); 997 998 /* 999 * EMSGSIZE signifies the virtqueue did not have enough 1000 * entries available to hold the last mbuf. This is not 1001 * an error. We should not get ENOSPC since we check if 1002 * the virtqueue is full before attempting to add a 1003 * buffer. 1004 */ 1005 if (error == EMSGSIZE) 1006 error = 0; 1007 } 1008 1009 return (error); 1010 } 1011 1012 static void 1013 vtnet_free_rx_mbufs(struct vtnet_softc *sc) 1014 { 1015 struct virtqueue *vq; 1016 struct mbuf *m; 1017 int last; 1018 1019 vq = sc->vtnet_rx_vq; 1020 last = 0; 1021 1022 while ((m = virtqueue_drain(vq, &last)) != NULL) 1023 m_freem(m); 1024 1025 KASSERT(virtqueue_empty(vq), ("mbufs remaining in Rx Vq")); 1026 } 1027 1028 static void 1029 vtnet_free_tx_mbufs(struct vtnet_softc *sc) 1030 { 1031 struct virtqueue *vq; 1032 struct vtnet_tx_header *txhdr; 1033 int last; 1034 1035 vq = sc->vtnet_tx_vq; 1036 last = 0; 1037 1038 while ((txhdr = virtqueue_drain(vq, &last)) != NULL) { 1039 m_freem(txhdr->vth_mbuf); 1040 vtnet_enqueue_txhdr(sc, txhdr); 1041 } 1042 1043 KASSERT(virtqueue_empty(vq), ("mbufs remaining in Tx Vq")); 1044 } 1045 1046 static void 1047 vtnet_free_ctrl_vq(struct vtnet_softc *sc) 1048 { 1049 /* 1050 * The control virtqueue is only polled, therefore 1051 * it should already be empty. 1052 */ 1053 KASSERT(virtqueue_empty(sc->vtnet_ctrl_vq), 1054 ("Ctrl Vq not empty")); 1055 } 1056 1057 static struct mbuf * 1058 vtnet_alloc_rxbuf(struct vtnet_softc *sc, int nbufs, struct mbuf **m_tailp) 1059 { 1060 struct mbuf *m_head, *m_tail, *m; 1061 int i, clsize; 1062 1063 clsize = sc->vtnet_rx_mbuf_size; 1064 1065 /*use getcl instead of getjcl. see if_mxge.c comment line 2398*/ 1066 //m_head = m_getjcl(M_DONTWAIT, MT_DATA, M_PKTHDR, clsize); 1067 m_head = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR ); 1068 if (m_head == NULL) 1069 goto fail; 1070 1071 m_head->m_len = clsize; 1072 m_tail = m_head; 1073 1074 if (nbufs > 1) { 1075 KASSERT(sc->vtnet_flags & VTNET_FLAG_LRO_NOMRG, 1076 ("chained Rx mbuf requested without LRO_NOMRG")); 1077 1078 for (i = 0; i < nbufs - 1; i++) { 1079 //m = m_getjcl(M_DONTWAIT, MT_DATA, 0, clsize); 1080 m = m_getcl(M_NOWAIT, MT_DATA, 0); 1081 if (m == NULL) 1082 goto fail; 1083 1084 m->m_len = clsize; 1085 m_tail->m_next = m; 1086 m_tail = m; 1087 } 1088 } 1089 1090 if (m_tailp != NULL) 1091 *m_tailp = m_tail; 1092 1093 return (m_head); 1094 1095 fail: 1096 sc->vtnet_stats.mbuf_alloc_failed++; 1097 m_freem(m_head); 1098 1099 return (NULL); 1100 } 1101 1102 static int 1103 vtnet_replace_rxbuf(struct vtnet_softc *sc, struct mbuf *m0, int len0) 1104 { 1105 struct mbuf *m, *m_prev; 1106 struct mbuf *m_new, *m_tail; 1107 int len, clsize, nreplace, error; 1108 1109 m = m0; 1110 m_prev = NULL; 1111 len = len0; 1112 1113 m_tail = NULL; 1114 clsize = sc->vtnet_rx_mbuf_size; 1115 nreplace = 0; 1116 1117 if (m->m_next != NULL) 1118 KASSERT(sc->vtnet_flags & VTNET_FLAG_LRO_NOMRG, 1119 ("chained Rx mbuf without LRO_NOMRG")); 1120 1121 /* 1122 * Since LRO_NOMRG mbuf chains are so large, we want to avoid 1123 * allocating an entire chain for each received frame. When 1124 * the received frame's length is less than that of the chain, 1125 * the unused mbufs are reassigned to the new chain. 1126 */ 1127 while (len > 0) { 1128 /* 1129 * Something is seriously wrong if we received 1130 * a frame larger than the mbuf chain. Drop it. 1131 */ 1132 if (m == NULL) { 1133 sc->vtnet_stats.rx_frame_too_large++; 1134 return (EMSGSIZE); 1135 } 1136 1137 KASSERT(m->m_len == clsize, 1138 ("mbuf length not expected cluster size: %d", 1139 m->m_len)); 1140 1141 m->m_len = MIN(m->m_len, len); 1142 len -= m->m_len; 1143 1144 m_prev = m; 1145 m = m->m_next; 1146 nreplace++; 1147 } 1148 1149 KASSERT(m_prev != NULL, ("m_prev == NULL")); 1150 KASSERT(nreplace <= sc->vtnet_rx_mbuf_count, 1151 ("too many replacement mbufs: %d/%d", nreplace, 1152 sc->vtnet_rx_mbuf_count)); 1153 1154 m_new = vtnet_alloc_rxbuf(sc, nreplace, &m_tail); 1155 if (m_new == NULL) { 1156 m_prev->m_len = clsize; 1157 return (ENOBUFS); 1158 } 1159 1160 /* 1161 * Move unused mbufs, if any, from the original chain 1162 * onto the end of the new chain. 1163 */ 1164 if (m_prev->m_next != NULL) { 1165 m_tail->m_next = m_prev->m_next; 1166 m_prev->m_next = NULL; 1167 } 1168 1169 error = vtnet_enqueue_rxbuf(sc, m_new); 1170 if (error) { 1171 /* 1172 * BAD! We could not enqueue the replacement mbuf chain. We 1173 * must restore the m0 chain to the original state if it was 1174 * modified so we can subsequently discard it. 1175 * 1176 * NOTE: The replacement is suppose to be an identical copy 1177 * to the one just dequeued so this is an unexpected error. 1178 */ 1179 sc->vtnet_stats.rx_enq_replacement_failed++; 1180 1181 if (m_tail->m_next != NULL) { 1182 m_prev->m_next = m_tail->m_next; 1183 m_tail->m_next = NULL; 1184 } 1185 1186 m_prev->m_len = clsize; 1187 m_freem(m_new); 1188 } 1189 1190 return (error); 1191 } 1192 1193 static int 1194 vtnet_newbuf(struct vtnet_softc *sc) 1195 { 1196 struct mbuf *m; 1197 int error; 1198 1199 m = vtnet_alloc_rxbuf(sc, sc->vtnet_rx_mbuf_count, NULL); 1200 if (m == NULL) 1201 return (ENOBUFS); 1202 1203 error = vtnet_enqueue_rxbuf(sc, m); 1204 if (error) 1205 m_freem(m); 1206 1207 return (error); 1208 } 1209 1210 static void 1211 vtnet_discard_merged_rxbuf(struct vtnet_softc *sc, int nbufs) 1212 { 1213 struct virtqueue *vq; 1214 struct mbuf *m; 1215 1216 vq = sc->vtnet_rx_vq; 1217 1218 while (--nbufs > 0) { 1219 if ((m = virtqueue_dequeue(vq, NULL)) == NULL) 1220 break; 1221 vtnet_discard_rxbuf(sc, m); 1222 } 1223 } 1224 1225 static void 1226 vtnet_discard_rxbuf(struct vtnet_softc *sc, struct mbuf *m) 1227 { 1228 int error; 1229 1230 /* 1231 * Requeue the discarded mbuf. This should always be 1232 * successful since it was just dequeued. 1233 */ 1234 error = vtnet_enqueue_rxbuf(sc, m); 1235 KASSERT(error == 0, ("cannot requeue discarded mbuf")); 1236 } 1237 1238 static int 1239 vtnet_enqueue_rxbuf(struct vtnet_softc *sc, struct mbuf *m) 1240 { 1241 struct sglist sg; 1242 struct sglist_seg segs[VTNET_MAX_RX_SEGS]; 1243 struct vtnet_rx_header *rxhdr; 1244 struct virtio_net_hdr *hdr; 1245 uint8_t *mdata; 1246 int offset, error; 1247 1248 ASSERT_SERIALIZED(&sc->vtnet_slz); 1249 if ((sc->vtnet_flags & VTNET_FLAG_LRO_NOMRG) == 0) 1250 KASSERT(m->m_next == NULL, ("chained Rx mbuf")); 1251 1252 sglist_init(&sg, sc->vtnet_rx_nsegs, segs); 1253 1254 mdata = mtod(m, uint8_t *); 1255 offset = 0; 1256 1257 if ((sc->vtnet_flags & VTNET_FLAG_MRG_RXBUFS) == 0) { 1258 rxhdr = (struct vtnet_rx_header *) mdata; 1259 hdr = &rxhdr->vrh_hdr; 1260 offset += sizeof(struct vtnet_rx_header); 1261 1262 error = sglist_append(&sg, hdr, sc->vtnet_hdr_size); 1263 KASSERT(error == 0, ("cannot add header to sglist")); 1264 } 1265 1266 error = sglist_append(&sg, mdata + offset, m->m_len - offset); 1267 if (error) 1268 return (error); 1269 1270 if (m->m_next != NULL) { 1271 error = sglist_append_mbuf(&sg, m->m_next); 1272 if (error) 1273 return (error); 1274 } 1275 1276 return (virtqueue_enqueue(sc->vtnet_rx_vq, m, &sg, 0, sg.sg_nseg)); 1277 } 1278 1279 static void 1280 vtnet_vlan_tag_remove(struct mbuf *m) 1281 { 1282 struct ether_vlan_header *evl; 1283 1284 evl = mtod(m, struct ether_vlan_header *); 1285 1286 m->m_pkthdr.ether_vlantag = ntohs(evl->evl_tag); 1287 m->m_flags |= M_VLANTAG; 1288 1289 /* Strip the 802.1Q header. */ 1290 bcopy((char *) evl, (char *) evl + ETHER_VLAN_ENCAP_LEN, 1291 ETHER_HDR_LEN - ETHER_TYPE_LEN); 1292 m_adj(m, ETHER_VLAN_ENCAP_LEN); 1293 } 1294 1295 /* 1296 * Alternative method of doing receive checksum offloading. Rather 1297 * than parsing the received frame down to the IP header, use the 1298 * csum_offset to determine which CSUM_* flags are appropriate. We 1299 * can get by with doing this only because the checksum offsets are 1300 * unique for the things we care about. 1301 */ 1302 static int 1303 vtnet_rx_csum(struct vtnet_softc *sc, struct mbuf *m, 1304 struct virtio_net_hdr *hdr) 1305 { 1306 struct ether_header *eh; 1307 struct ether_vlan_header *evh; 1308 struct udphdr *udp; 1309 int csum_len; 1310 uint16_t eth_type; 1311 1312 csum_len = hdr->csum_start + hdr->csum_offset; 1313 1314 if (csum_len < sizeof(struct ether_header) + sizeof(struct ip)) 1315 return (1); 1316 if (m->m_len < csum_len) 1317 return (1); 1318 1319 eh = mtod(m, struct ether_header *); 1320 eth_type = ntohs(eh->ether_type); 1321 if (eth_type == ETHERTYPE_VLAN) { 1322 evh = mtod(m, struct ether_vlan_header *); 1323 eth_type = ntohs(evh->evl_proto); 1324 } 1325 1326 if (eth_type != ETHERTYPE_IP && eth_type != ETHERTYPE_IPV6) { 1327 sc->vtnet_stats.rx_csum_bad_ethtype++; 1328 return (1); 1329 } 1330 1331 /* Use the offset to determine the appropriate CSUM_* flags. */ 1332 switch (hdr->csum_offset) { 1333 case offsetof(struct udphdr, uh_sum): 1334 if (m->m_len < hdr->csum_start + sizeof(struct udphdr)) 1335 return (1); 1336 udp = (struct udphdr *)(mtod(m, uint8_t *) + hdr->csum_start); 1337 if (udp->uh_sum == 0) 1338 return (0); 1339 1340 /* FALLTHROUGH */ 1341 1342 case offsetof(struct tcphdr, th_sum): 1343 m->m_pkthdr.csum_flags |= CSUM_DATA_VALID | CSUM_PSEUDO_HDR; 1344 m->m_pkthdr.csum_data = 0xFFFF; 1345 break; 1346 1347 default: 1348 sc->vtnet_stats.rx_csum_bad_offset++; 1349 return (1); 1350 } 1351 1352 sc->vtnet_stats.rx_csum_offloaded++; 1353 1354 return (0); 1355 } 1356 1357 static int 1358 vtnet_rxeof_merged(struct vtnet_softc *sc, struct mbuf *m_head, int nbufs) 1359 { 1360 struct ifnet *ifp; 1361 struct virtqueue *vq; 1362 struct mbuf *m, *m_tail; 1363 int len; 1364 1365 ifp = sc->vtnet_ifp; 1366 vq = sc->vtnet_rx_vq; 1367 m_tail = m_head; 1368 1369 while (--nbufs > 0) { 1370 m = virtqueue_dequeue(vq, &len); 1371 if (m == NULL) { 1372 ifp->if_ierrors++; 1373 goto fail; 1374 } 1375 1376 if (vtnet_newbuf(sc) != 0) { 1377 ifp->if_iqdrops++; 1378 vtnet_discard_rxbuf(sc, m); 1379 if (nbufs > 1) 1380 vtnet_discard_merged_rxbuf(sc, nbufs); 1381 goto fail; 1382 } 1383 1384 if (m->m_len < len) 1385 len = m->m_len; 1386 1387 m->m_len = len; 1388 m->m_flags &= ~M_PKTHDR; 1389 1390 m_head->m_pkthdr.len += len; 1391 m_tail->m_next = m; 1392 m_tail = m; 1393 } 1394 1395 return (0); 1396 1397 fail: 1398 sc->vtnet_stats.rx_mergeable_failed++; 1399 m_freem(m_head); 1400 1401 return (1); 1402 } 1403 1404 static int 1405 vtnet_rxeof(struct vtnet_softc *sc, int count, int *rx_npktsp) 1406 { 1407 struct virtio_net_hdr lhdr; 1408 struct ifnet *ifp; 1409 struct virtqueue *vq; 1410 struct mbuf *m; 1411 struct ether_header *eh; 1412 struct virtio_net_hdr *hdr; 1413 struct virtio_net_hdr_mrg_rxbuf *mhdr; 1414 int len, deq, nbufs, adjsz, rx_npkts; 1415 1416 ifp = sc->vtnet_ifp; 1417 vq = sc->vtnet_rx_vq; 1418 hdr = &lhdr; 1419 deq = 0; 1420 rx_npkts = 0; 1421 1422 ASSERT_SERIALIZED(&sc->vtnet_slz); 1423 1424 while (--count >= 0) { 1425 m = virtqueue_dequeue(vq, &len); 1426 if (m == NULL) 1427 break; 1428 deq++; 1429 1430 if (len < sc->vtnet_hdr_size + ETHER_HDR_LEN) { 1431 ifp->if_ierrors++; 1432 vtnet_discard_rxbuf(sc, m); 1433 continue; 1434 } 1435 1436 if ((sc->vtnet_flags & VTNET_FLAG_MRG_RXBUFS) == 0) { 1437 nbufs = 1; 1438 adjsz = sizeof(struct vtnet_rx_header); 1439 /* 1440 * Account for our pad between the header and 1441 * the actual start of the frame. 1442 */ 1443 len += VTNET_RX_HEADER_PAD; 1444 } else { 1445 mhdr = mtod(m, struct virtio_net_hdr_mrg_rxbuf *); 1446 nbufs = mhdr->num_buffers; 1447 adjsz = sizeof(struct virtio_net_hdr_mrg_rxbuf); 1448 } 1449 1450 if (vtnet_replace_rxbuf(sc, m, len) != 0) { 1451 ifp->if_iqdrops++; 1452 vtnet_discard_rxbuf(sc, m); 1453 if (nbufs > 1) 1454 vtnet_discard_merged_rxbuf(sc, nbufs); 1455 continue; 1456 } 1457 1458 m->m_pkthdr.len = len; 1459 m->m_pkthdr.rcvif = ifp; 1460 m->m_pkthdr.csum_flags = 0; 1461 1462 if (nbufs > 1) { 1463 if (vtnet_rxeof_merged(sc, m, nbufs) != 0) 1464 continue; 1465 } 1466 1467 ifp->if_ipackets++; 1468 1469 /* 1470 * Save copy of header before we strip it. For both mergeable 1471 * and non-mergeable, the VirtIO header is placed first in the 1472 * mbuf's data. We no longer need num_buffers, so always use a 1473 * virtio_net_hdr. 1474 */ 1475 memcpy(hdr, mtod(m, void *), sizeof(struct virtio_net_hdr)); 1476 m_adj(m, adjsz); 1477 1478 if (ifp->if_capenable & IFCAP_VLAN_HWTAGGING) { 1479 eh = mtod(m, struct ether_header *); 1480 if (eh->ether_type == htons(ETHERTYPE_VLAN)) { 1481 vtnet_vlan_tag_remove(m); 1482 1483 /* 1484 * With the 802.1Q header removed, update the 1485 * checksum starting location accordingly. 1486 */ 1487 if (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) 1488 hdr->csum_start -= 1489 ETHER_VLAN_ENCAP_LEN; 1490 } 1491 } 1492 1493 if (ifp->if_capenable & IFCAP_RXCSUM && 1494 hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) { 1495 if (vtnet_rx_csum(sc, m, hdr) != 0) 1496 sc->vtnet_stats.rx_csum_failed++; 1497 } 1498 1499 lwkt_serialize_exit(&sc->vtnet_slz); 1500 rx_npkts++; 1501 ifp->if_input(ifp, m, NULL, -1); 1502 lwkt_serialize_enter(&sc->vtnet_slz); 1503 1504 /* 1505 * The interface may have been stopped while we were 1506 * passing the packet up the network stack. 1507 */ 1508 if ((ifp->if_flags & IFF_RUNNING) == 0) 1509 break; 1510 } 1511 1512 virtqueue_notify(vq, &sc->vtnet_slz); 1513 1514 if (rx_npktsp != NULL) 1515 *rx_npktsp = rx_npkts; 1516 1517 return (count > 0 ? 0 : EAGAIN); 1518 } 1519 1520 static void 1521 vtnet_rx_intr_task(void *arg) 1522 { 1523 struct vtnet_softc *sc; 1524 struct ifnet *ifp; 1525 int more; 1526 1527 sc = arg; 1528 ifp = sc->vtnet_ifp; 1529 1530 next: 1531 // lwkt_serialize_enter(&sc->vtnet_slz); 1532 1533 if ((ifp->if_flags & IFF_RUNNING) == 0) { 1534 vtnet_enable_rx_intr(sc); 1535 // lwkt_serialize_exit(&sc->vtnet_slz); 1536 return; 1537 } 1538 1539 more = vtnet_rxeof(sc, sc->vtnet_rx_process_limit, NULL); 1540 if (!more && vtnet_enable_rx_intr(sc) != 0) { 1541 vtnet_disable_rx_intr(sc); 1542 more = 1; 1543 } 1544 1545 // lwkt_serialize_exit(&sc->vtnet_slz); 1546 1547 if (more) { 1548 sc->vtnet_stats.rx_task_rescheduled++; 1549 goto next; 1550 } 1551 } 1552 1553 static int 1554 vtnet_rx_vq_intr(void *xsc) 1555 { 1556 struct vtnet_softc *sc; 1557 1558 sc = xsc; 1559 1560 vtnet_disable_rx_intr(sc); 1561 vtnet_rx_intr_task(sc); 1562 1563 return (1); 1564 } 1565 1566 static void 1567 vtnet_enqueue_txhdr(struct vtnet_softc *sc, struct vtnet_tx_header *txhdr) 1568 { 1569 bzero(txhdr, sizeof(*txhdr)); 1570 SLIST_INSERT_HEAD(&sc->vtnet_txhdr_free, txhdr, link); 1571 } 1572 1573 static void 1574 vtnet_txeof(struct vtnet_softc *sc) 1575 { 1576 struct virtqueue *vq; 1577 struct ifnet *ifp; 1578 struct vtnet_tx_header *txhdr; 1579 int deq; 1580 1581 vq = sc->vtnet_tx_vq; 1582 ifp = sc->vtnet_ifp; 1583 deq = 0; 1584 1585 ASSERT_SERIALIZED(&sc->vtnet_slz); 1586 1587 while ((txhdr = virtqueue_dequeue(vq, NULL)) != NULL) { 1588 deq++; 1589 ifp->if_opackets++; 1590 m_freem(txhdr->vth_mbuf); 1591 vtnet_enqueue_txhdr(sc, txhdr); 1592 } 1593 1594 if (deq > 0) { 1595 ifq_clr_oactive(&ifp->if_snd); 1596 if (virtqueue_empty(vq)) 1597 sc->vtnet_watchdog_timer = 0; 1598 } 1599 } 1600 1601 static struct mbuf * 1602 vtnet_tx_offload(struct vtnet_softc *sc, struct mbuf *m, 1603 struct virtio_net_hdr *hdr) 1604 { 1605 struct ifnet *ifp; 1606 struct ether_header *eh; 1607 struct ether_vlan_header *evh; 1608 struct ip *ip; 1609 struct ip6_hdr *ip6; 1610 struct tcphdr *tcp; 1611 int ip_offset; 1612 uint16_t eth_type, csum_start; 1613 uint8_t ip_proto, gso_type; 1614 1615 ifp = sc->vtnet_ifp; 1616 M_ASSERTPKTHDR(m); 1617 1618 ip_offset = sizeof(struct ether_header); 1619 if (m->m_len < ip_offset) { 1620 if ((m = m_pullup(m, ip_offset)) == NULL) 1621 return (NULL); 1622 } 1623 1624 eh = mtod(m, struct ether_header *); 1625 eth_type = ntohs(eh->ether_type); 1626 if (eth_type == ETHERTYPE_VLAN) { 1627 ip_offset = sizeof(struct ether_vlan_header); 1628 if (m->m_len < ip_offset) { 1629 if ((m = m_pullup(m, ip_offset)) == NULL) 1630 return (NULL); 1631 } 1632 evh = mtod(m, struct ether_vlan_header *); 1633 eth_type = ntohs(evh->evl_proto); 1634 } 1635 1636 switch (eth_type) { 1637 case ETHERTYPE_IP: 1638 if (m->m_len < ip_offset + sizeof(struct ip)) { 1639 m = m_pullup(m, ip_offset + sizeof(struct ip)); 1640 if (m == NULL) 1641 return (NULL); 1642 } 1643 1644 ip = (struct ip *)(mtod(m, uint8_t *) + ip_offset); 1645 ip_proto = ip->ip_p; 1646 csum_start = ip_offset + (ip->ip_hl << 2); 1647 gso_type = VIRTIO_NET_HDR_GSO_TCPV4; 1648 break; 1649 1650 case ETHERTYPE_IPV6: 1651 if (m->m_len < ip_offset + sizeof(struct ip6_hdr)) { 1652 m = m_pullup(m, ip_offset + sizeof(struct ip6_hdr)); 1653 if (m == NULL) 1654 return (NULL); 1655 } 1656 1657 ip6 = (struct ip6_hdr *)(mtod(m, uint8_t *) + ip_offset); 1658 /* 1659 * XXX Assume no extension headers are present. Presently, 1660 * this will always be true in the case of TSO, and FreeBSD 1661 * does not perform checksum offloading of IPv6 yet. 1662 */ 1663 ip_proto = ip6->ip6_nxt; 1664 csum_start = ip_offset + sizeof(struct ip6_hdr); 1665 gso_type = VIRTIO_NET_HDR_GSO_TCPV6; 1666 break; 1667 1668 default: 1669 return (m); 1670 } 1671 1672 if (m->m_pkthdr.csum_flags & VTNET_CSUM_OFFLOAD) { 1673 hdr->flags |= VIRTIO_NET_HDR_F_NEEDS_CSUM; 1674 hdr->csum_start = csum_start; 1675 hdr->csum_offset = m->m_pkthdr.csum_data; 1676 1677 sc->vtnet_stats.tx_csum_offloaded++; 1678 } 1679 1680 if (m->m_pkthdr.csum_flags & CSUM_TSO) { 1681 if (ip_proto != IPPROTO_TCP) 1682 return (m); 1683 1684 if (m->m_len < csum_start + sizeof(struct tcphdr)) { 1685 m = m_pullup(m, csum_start + sizeof(struct tcphdr)); 1686 if (m == NULL) 1687 return (NULL); 1688 } 1689 1690 tcp = (struct tcphdr *)(mtod(m, uint8_t *) + csum_start); 1691 hdr->gso_type = gso_type; 1692 hdr->hdr_len = csum_start + (tcp->th_off << 2); 1693 hdr->gso_size = m->m_pkthdr.tso_segsz; 1694 1695 if (tcp->th_flags & TH_CWR) { 1696 /* 1697 * Drop if we did not negotiate VIRTIO_NET_F_HOST_ECN. 1698 * ECN support is only configurable globally with the 1699 * net.inet.tcp.ecn.enable sysctl knob. 1700 */ 1701 if ((sc->vtnet_flags & VTNET_FLAG_TSO_ECN) == 0) { 1702 if_printf(ifp, "TSO with ECN not supported " 1703 "by host\n"); 1704 m_freem(m); 1705 return (NULL); 1706 } 1707 1708 hdr->gso_type |= VIRTIO_NET_HDR_GSO_ECN; 1709 } 1710 1711 sc->vtnet_stats.tx_tso_offloaded++; 1712 } 1713 1714 return (m); 1715 } 1716 1717 static int 1718 vtnet_enqueue_txbuf(struct vtnet_softc *sc, struct mbuf **m_head, 1719 struct vtnet_tx_header *txhdr) 1720 { 1721 struct sglist sg; 1722 struct sglist_seg segs[VTNET_MAX_TX_SEGS]; 1723 struct virtqueue *vq; 1724 struct mbuf *m; 1725 int error; 1726 1727 vq = sc->vtnet_tx_vq; 1728 m = *m_head; 1729 1730 sglist_init(&sg, sc->vtnet_tx_nsegs, segs); 1731 error = sglist_append(&sg, &txhdr->vth_uhdr, sc->vtnet_hdr_size); 1732 KASSERT(error == 0 && sg.sg_nseg == 1, 1733 ("%s: error %d adding header to sglist", __func__, error)); 1734 1735 error = sglist_append_mbuf(&sg, m); 1736 if (error) { 1737 m = m_defrag(m, M_NOWAIT); 1738 if (m == NULL) 1739 goto fail; 1740 1741 *m_head = m; 1742 sc->vtnet_stats.tx_defragged++; 1743 1744 error = sglist_append_mbuf(&sg, m); 1745 if (error) 1746 goto fail; 1747 } 1748 1749 txhdr->vth_mbuf = m; 1750 error = virtqueue_enqueue(vq, txhdr, &sg, sg.sg_nseg, 0); 1751 1752 return (error); 1753 1754 fail: 1755 sc->vtnet_stats.tx_defrag_failed++; 1756 m_freem(*m_head); 1757 *m_head = NULL; 1758 1759 return (ENOBUFS); 1760 } 1761 1762 static struct mbuf * 1763 vtnet_vlan_tag_insert(struct mbuf *m) 1764 { 1765 struct mbuf *n; 1766 struct ether_vlan_header *evl; 1767 1768 if (M_WRITABLE(m) == 0) { 1769 n = m_dup(m, M_NOWAIT); 1770 m_freem(m); 1771 if ((m = n) == NULL) 1772 return (NULL); 1773 } 1774 1775 M_PREPEND(m, ETHER_VLAN_ENCAP_LEN, M_NOWAIT); 1776 if (m == NULL) 1777 return (NULL); 1778 if (m->m_len < sizeof(struct ether_vlan_header)) { 1779 m = m_pullup(m, sizeof(struct ether_vlan_header)); 1780 if (m == NULL) 1781 return (NULL); 1782 } 1783 1784 /* Insert 802.1Q header into the existing Ethernet header. */ 1785 evl = mtod(m, struct ether_vlan_header *); 1786 bcopy((char *) evl + ETHER_VLAN_ENCAP_LEN, 1787 (char *) evl, ETHER_HDR_LEN - ETHER_TYPE_LEN); 1788 evl->evl_encap_proto = htons(ETHERTYPE_VLAN); 1789 evl->evl_tag = htons(m->m_pkthdr.ether_vlantag); 1790 m->m_flags &= ~M_VLANTAG; 1791 1792 return (m); 1793 } 1794 1795 static int 1796 vtnet_encap(struct vtnet_softc *sc, struct mbuf **m_head) 1797 { 1798 struct vtnet_tx_header *txhdr; 1799 struct virtio_net_hdr *hdr; 1800 struct mbuf *m; 1801 int error; 1802 1803 txhdr = SLIST_FIRST(&sc->vtnet_txhdr_free); 1804 if (txhdr == NULL) 1805 return (ENOBUFS); 1806 SLIST_REMOVE_HEAD(&sc->vtnet_txhdr_free, link); 1807 1808 /* 1809 * Always use the non-mergeable header to simplify things. When 1810 * the mergeable feature is negotiated, the num_buffers field 1811 * must be set to zero. We use vtnet_hdr_size later to enqueue 1812 * the correct header size to the host. 1813 */ 1814 hdr = &txhdr->vth_uhdr.hdr; 1815 m = *m_head; 1816 1817 error = ENOBUFS; 1818 1819 if (m->m_flags & M_VLANTAG) { 1820 //m = ether_vlanencap(m, m->m_pkthdr.ether_vtag); 1821 m = vtnet_vlan_tag_insert(m); 1822 if ((*m_head = m) == NULL) 1823 goto fail; 1824 m->m_flags &= ~M_VLANTAG; 1825 } 1826 1827 if (m->m_pkthdr.csum_flags != 0) { 1828 m = vtnet_tx_offload(sc, m, hdr); 1829 if ((*m_head = m) == NULL) 1830 goto fail; 1831 } 1832 1833 error = vtnet_enqueue_txbuf(sc, m_head, txhdr); 1834 fail: 1835 if (error != 0) 1836 vtnet_enqueue_txhdr(sc, txhdr); 1837 return (error); 1838 } 1839 1840 static void 1841 vtnet_start(struct ifnet *ifp, struct ifaltq_subque *ifsq) 1842 { 1843 struct vtnet_softc *sc; 1844 1845 sc = ifp->if_softc; 1846 1847 ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq); 1848 lwkt_serialize_enter(&sc->vtnet_slz); 1849 vtnet_start_locked(ifp, ifsq); 1850 lwkt_serialize_exit(&sc->vtnet_slz); 1851 } 1852 1853 static void 1854 vtnet_start_locked(struct ifnet *ifp, struct ifaltq_subque *ifsq) 1855 { 1856 struct vtnet_softc *sc; 1857 struct virtqueue *vq; 1858 struct mbuf *m0; 1859 int enq; 1860 1861 sc = ifp->if_softc; 1862 vq = sc->vtnet_tx_vq; 1863 enq = 0; 1864 1865 ASSERT_SERIALIZED(&sc->vtnet_slz); 1866 1867 if ((ifp->if_flags & (IFF_RUNNING)) != 1868 IFF_RUNNING || ((sc->vtnet_flags & VTNET_FLAG_LINK) == 0)) 1869 return; 1870 1871 #ifdef VTNET_TX_INTR_MODERATION 1872 if (virtqueue_nused(vq) >= sc->vtnet_tx_size / 2) 1873 vtnet_txeof(sc); 1874 #endif 1875 1876 while (!ifsq_is_empty(ifsq)) { 1877 if (virtqueue_full(vq)) { 1878 ifq_set_oactive(&ifp->if_snd); 1879 break; 1880 } 1881 1882 m0 = ifq_dequeue(&ifp->if_snd); 1883 if (m0 == NULL) 1884 break; 1885 1886 if (vtnet_encap(sc, &m0) != 0) { 1887 if (m0 == NULL) 1888 break; 1889 ifq_prepend(&ifp->if_snd, m0); 1890 ifq_set_oactive(&ifp->if_snd); 1891 break; 1892 } 1893 1894 enq++; 1895 ETHER_BPF_MTAP(ifp, m0); 1896 } 1897 1898 if (enq > 0) { 1899 virtqueue_notify(vq, &sc->vtnet_slz); 1900 sc->vtnet_watchdog_timer = VTNET_WATCHDOG_TIMEOUT; 1901 } 1902 } 1903 1904 static void 1905 vtnet_tick(void *xsc) 1906 { 1907 struct vtnet_softc *sc; 1908 1909 sc = xsc; 1910 1911 #if 0 1912 ASSERT_SERIALIZED(&sc->vtnet_slz); 1913 #ifdef VTNET_DEBUG 1914 virtqueue_dump(sc->vtnet_rx_vq); 1915 virtqueue_dump(sc->vtnet_tx_vq); 1916 #endif 1917 1918 vtnet_watchdog(sc); 1919 callout_reset(&sc->vtnet_tick_ch, hz, vtnet_tick, sc); 1920 #endif 1921 } 1922 1923 static void 1924 vtnet_tx_intr_task(void *arg) 1925 { 1926 struct vtnet_softc *sc; 1927 struct ifnet *ifp; 1928 struct ifaltq_subque *ifsq; 1929 1930 sc = arg; 1931 ifp = sc->vtnet_ifp; 1932 ifsq = ifq_get_subq_default(&ifp->if_snd); 1933 1934 next: 1935 // lwkt_serialize_enter(&sc->vtnet_slz); 1936 1937 if ((ifp->if_flags & IFF_RUNNING) == 0) { 1938 vtnet_enable_tx_intr(sc); 1939 // lwkt_serialize_exit(&sc->vtnet_slz); 1940 return; 1941 } 1942 1943 vtnet_txeof(sc); 1944 1945 if (!ifsq_is_empty(ifsq)) 1946 vtnet_start_locked(ifp, ifsq); 1947 1948 if (vtnet_enable_tx_intr(sc) != 0) { 1949 vtnet_disable_tx_intr(sc); 1950 sc->vtnet_stats.tx_task_rescheduled++; 1951 // lwkt_serialize_exit(&sc->vtnet_slz); 1952 goto next; 1953 } 1954 1955 // lwkt_serialize_exit(&sc->vtnet_slz); 1956 } 1957 1958 static int 1959 vtnet_tx_vq_intr(void *xsc) 1960 { 1961 struct vtnet_softc *sc; 1962 1963 sc = xsc; 1964 1965 vtnet_disable_tx_intr(sc); 1966 vtnet_tx_intr_task(sc); 1967 1968 return (1); 1969 } 1970 1971 static void 1972 vtnet_stop(struct vtnet_softc *sc) 1973 { 1974 device_t dev; 1975 struct ifnet *ifp; 1976 1977 dev = sc->vtnet_dev; 1978 ifp = sc->vtnet_ifp; 1979 1980 ASSERT_SERIALIZED(&sc->vtnet_slz); 1981 1982 sc->vtnet_watchdog_timer = 0; 1983 callout_stop(&sc->vtnet_tick_ch); 1984 ifq_clr_oactive(&ifp->if_snd); 1985 ifp->if_flags &= ~(IFF_RUNNING); 1986 1987 vtnet_disable_rx_intr(sc); 1988 vtnet_disable_tx_intr(sc); 1989 1990 /* 1991 * Stop the host VirtIO adapter. Note this will reset the host 1992 * adapter's state back to the pre-initialized state, so in 1993 * order to make the device usable again, we must drive it 1994 * through virtio_reinit() and virtio_reinit_complete(). 1995 */ 1996 virtio_stop(dev); 1997 1998 sc->vtnet_flags &= ~VTNET_FLAG_LINK; 1999 2000 vtnet_free_rx_mbufs(sc); 2001 vtnet_free_tx_mbufs(sc); 2002 } 2003 2004 static int 2005 vtnet_virtio_reinit(struct vtnet_softc *sc) 2006 { 2007 device_t dev; 2008 struct ifnet *ifp; 2009 uint64_t features; 2010 int error; 2011 2012 dev = sc->vtnet_dev; 2013 ifp = sc->vtnet_ifp; 2014 features = sc->vtnet_features; 2015 2016 /* 2017 * Re-negotiate with the host, removing any disabled receive 2018 * features. Transmit features are disabled only on our side 2019 * via if_capenable and if_hwassist. 2020 */ 2021 2022 if (ifp->if_capabilities & IFCAP_RXCSUM) { 2023 if ((ifp->if_capenable & IFCAP_RXCSUM) == 0) 2024 features &= ~VIRTIO_NET_F_GUEST_CSUM; 2025 } 2026 2027 #if 0 /* IFCAP_LRO doesn't exist in DragonFly. */ 2028 if (ifp->if_capabilities & IFCAP_LRO) { 2029 if ((ifp->if_capenable & IFCAP_LRO) == 0) 2030 features &= ~VTNET_LRO_FEATURES; 2031 } 2032 #endif 2033 2034 if (ifp->if_capabilities & IFCAP_VLAN_HWFILTER) { 2035 if ((ifp->if_capenable & IFCAP_VLAN_HWFILTER) == 0) 2036 features &= ~VIRTIO_NET_F_CTRL_VLAN; 2037 } 2038 2039 error = virtio_reinit(dev, features); 2040 if (error) 2041 device_printf(dev, "virtio reinit error %d\n", error); 2042 2043 return (error); 2044 } 2045 2046 static void 2047 vtnet_init_locked(struct vtnet_softc *sc) 2048 { 2049 device_t dev; 2050 struct ifnet *ifp; 2051 int error; 2052 2053 dev = sc->vtnet_dev; 2054 ifp = sc->vtnet_ifp; 2055 2056 ASSERT_SERIALIZED(&sc->vtnet_slz); 2057 2058 if (ifp->if_flags & IFF_RUNNING) 2059 return; 2060 2061 /* Stop host's adapter, cancel any pending I/O. */ 2062 vtnet_stop(sc); 2063 2064 /* Reinitialize the host device. */ 2065 error = vtnet_virtio_reinit(sc); 2066 if (error) { 2067 device_printf(dev, 2068 "reinitialization failed, stopping device...\n"); 2069 vtnet_stop(sc); 2070 return; 2071 } 2072 2073 /* Update host with assigned MAC address. */ 2074 bcopy(IF_LLADDR(ifp), sc->vtnet_hwaddr, ETHER_ADDR_LEN); 2075 vtnet_set_hwaddr(sc); 2076 2077 ifp->if_hwassist = 0; 2078 if (ifp->if_capenable & IFCAP_TXCSUM) 2079 ifp->if_hwassist |= VTNET_CSUM_OFFLOAD; 2080 if (ifp->if_capenable & IFCAP_TSO4) 2081 ifp->if_hwassist |= CSUM_TSO; 2082 2083 error = vtnet_init_rx_vq(sc); 2084 if (error) { 2085 device_printf(dev, 2086 "cannot allocate mbufs for Rx virtqueue\n"); 2087 vtnet_stop(sc); 2088 return; 2089 } 2090 2091 if (sc->vtnet_flags & VTNET_FLAG_CTRL_VQ) { 2092 if (sc->vtnet_flags & VTNET_FLAG_CTRL_RX) { 2093 /* Restore promiscuous and all-multicast modes. */ 2094 vtnet_rx_filter(sc); 2095 2096 /* Restore filtered MAC addresses. */ 2097 vtnet_rx_filter_mac(sc); 2098 } 2099 2100 /* Restore VLAN filters. */ 2101 if (ifp->if_capenable & IFCAP_VLAN_HWFILTER) 2102 vtnet_rx_filter_vlan(sc); 2103 } 2104 2105 { 2106 vtnet_enable_rx_intr(sc); 2107 vtnet_enable_tx_intr(sc); 2108 } 2109 2110 ifp->if_flags |= IFF_RUNNING; 2111 ifq_clr_oactive(&ifp->if_snd); 2112 2113 virtio_reinit_complete(dev); 2114 2115 vtnet_update_link_status(sc); 2116 callout_reset(&sc->vtnet_tick_ch, hz, vtnet_tick, sc); 2117 } 2118 2119 static void 2120 vtnet_init(void *xsc) 2121 { 2122 struct vtnet_softc *sc; 2123 2124 sc = xsc; 2125 2126 lwkt_serialize_enter(&sc->vtnet_slz); 2127 vtnet_init_locked(sc); 2128 lwkt_serialize_exit(&sc->vtnet_slz); 2129 } 2130 2131 static void 2132 vtnet_exec_ctrl_cmd(struct vtnet_softc *sc, void *cookie, 2133 struct sglist *sg, int readable, int writable) 2134 { 2135 struct virtqueue *vq; 2136 void *c; 2137 2138 vq = sc->vtnet_ctrl_vq; 2139 2140 ASSERT_SERIALIZED(&sc->vtnet_slz); 2141 KASSERT(sc->vtnet_flags & VTNET_FLAG_CTRL_VQ, 2142 ("no control virtqueue")); 2143 KASSERT(virtqueue_empty(vq), 2144 ("control command already enqueued")); 2145 2146 if (virtqueue_enqueue(vq, cookie, sg, readable, writable) != 0) 2147 return; 2148 2149 virtqueue_notify(vq, &sc->vtnet_slz); 2150 2151 /* 2152 * Poll until the command is complete. Previously, we would 2153 * sleep until the control virtqueue interrupt handler woke 2154 * us up, but dropping the VTNET_MTX leads to serialization 2155 * difficulties. 2156 * 2157 * Furthermore, it appears QEMU/KVM only allocates three MSIX 2158 * vectors. Two of those vectors are needed for the Rx and Tx 2159 * virtqueues. We do not support sharing both a Vq and config 2160 * changed notification on the same MSIX vector. 2161 */ 2162 c = virtqueue_poll(vq, NULL); 2163 KASSERT(c == cookie, ("unexpected control command response")); 2164 } 2165 2166 static int 2167 vtnet_ctrl_mac_cmd(struct vtnet_softc *sc, uint8_t *hwaddr) 2168 { 2169 struct { 2170 struct virtio_net_ctrl_hdr hdr __aligned(2); 2171 uint8_t pad1; 2172 char aligned_hwaddr[ETHER_ADDR_LEN] __aligned(8); 2173 uint8_t pad2; 2174 uint8_t ack; 2175 } s; 2176 struct sglist_seg segs[3]; 2177 struct sglist sg; 2178 int error; 2179 2180 s.hdr.class = VIRTIO_NET_CTRL_MAC; 2181 s.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET; 2182 s.ack = VIRTIO_NET_ERR; 2183 2184 /* Copy the mac address into physically contiguous memory */ 2185 memcpy(s.aligned_hwaddr, hwaddr, ETHER_ADDR_LEN); 2186 2187 sglist_init(&sg, 3, segs); 2188 error = 0; 2189 error |= sglist_append(&sg, &s.hdr, 2190 sizeof(struct virtio_net_ctrl_hdr)); 2191 error |= sglist_append(&sg, s.aligned_hwaddr, ETHER_ADDR_LEN); 2192 error |= sglist_append(&sg, &s.ack, sizeof(uint8_t)); 2193 KASSERT(error == 0 && sg.sg_nseg == 3, 2194 ("%s: error %d adding set MAC msg to sglist", __func__, error)); 2195 2196 vtnet_exec_ctrl_cmd(sc, &s.ack, &sg, sg.sg_nseg - 1, 1); 2197 2198 return (s.ack == VIRTIO_NET_OK ? 0 : EIO); 2199 } 2200 2201 static void 2202 vtnet_rx_filter(struct vtnet_softc *sc) 2203 { 2204 device_t dev; 2205 struct ifnet *ifp; 2206 2207 dev = sc->vtnet_dev; 2208 ifp = sc->vtnet_ifp; 2209 2210 ASSERT_SERIALIZED(&sc->vtnet_slz); 2211 KASSERT(sc->vtnet_flags & VTNET_FLAG_CTRL_RX, 2212 ("CTRL_RX feature not negotiated")); 2213 2214 if (vtnet_set_promisc(sc, ifp->if_flags & IFF_PROMISC) != 0) 2215 device_printf(dev, "cannot %s promiscuous mode\n", 2216 (ifp->if_flags & IFF_PROMISC) ? "enable" : "disable"); 2217 2218 if (vtnet_set_allmulti(sc, ifp->if_flags & IFF_ALLMULTI) != 0) 2219 device_printf(dev, "cannot %s all-multicast mode\n", 2220 (ifp->if_flags & IFF_ALLMULTI) ? "enable" : "disable"); 2221 } 2222 2223 static int 2224 vtnet_ctrl_rx_cmd(struct vtnet_softc *sc, int cmd, int on) 2225 { 2226 struct sglist_seg segs[3]; 2227 struct sglist sg; 2228 struct { 2229 struct virtio_net_ctrl_hdr hdr __aligned(2); 2230 uint8_t pad1; 2231 uint8_t onoff; 2232 uint8_t pad2; 2233 uint8_t ack; 2234 } s; 2235 int error; 2236 2237 KASSERT(sc->vtnet_flags & VTNET_FLAG_CTRL_RX, 2238 ("%s: CTRL_RX feature not negotiated", __func__)); 2239 2240 s.hdr.class = VIRTIO_NET_CTRL_RX; 2241 s.hdr.cmd = cmd; 2242 s.onoff = !!on; 2243 s.ack = VIRTIO_NET_ERR; 2244 2245 sglist_init(&sg, 3, segs); 2246 error = 0; 2247 error |= sglist_append(&sg, &s.hdr, sizeof(struct virtio_net_ctrl_hdr)); 2248 error |= sglist_append(&sg, &s.onoff, sizeof(uint8_t)); 2249 error |= sglist_append(&sg, &s.ack, sizeof(uint8_t)); 2250 KASSERT(error == 0 && sg.sg_nseg == 3, 2251 ("%s: error %d adding Rx message to sglist", __func__, error)); 2252 2253 vtnet_exec_ctrl_cmd(sc, &s.ack, &sg, sg.sg_nseg - 1, 1); 2254 2255 return (s.ack == VIRTIO_NET_OK ? 0 : EIO); 2256 } 2257 2258 static int 2259 vtnet_set_promisc(struct vtnet_softc *sc, int on) 2260 { 2261 2262 return (vtnet_ctrl_rx_cmd(sc, VIRTIO_NET_CTRL_RX_PROMISC, on)); 2263 } 2264 2265 static int 2266 vtnet_set_allmulti(struct vtnet_softc *sc, int on) 2267 { 2268 2269 return (vtnet_ctrl_rx_cmd(sc, VIRTIO_NET_CTRL_RX_ALLMULTI, on)); 2270 } 2271 2272 static void 2273 vtnet_rx_filter_mac(struct vtnet_softc *sc) 2274 { 2275 struct virtio_net_ctrl_hdr hdr __aligned(2); 2276 struct vtnet_mac_filter *filter; 2277 struct sglist_seg segs[4]; 2278 struct sglist sg; 2279 struct ifnet *ifp; 2280 struct ifaddr *ifa; 2281 struct ifaddr_container *ifac; 2282 struct ifmultiaddr *ifma; 2283 int ucnt, mcnt, promisc, allmulti, error; 2284 uint8_t ack; 2285 2286 ifp = sc->vtnet_ifp; 2287 ucnt = 0; 2288 mcnt = 0; 2289 promisc = 0; 2290 allmulti = 0; 2291 2292 ASSERT_SERIALIZED(&sc->vtnet_slz); 2293 KASSERT(sc->vtnet_flags & VTNET_FLAG_CTRL_RX, 2294 ("%s: CTRL_RX feature not negotiated", __func__)); 2295 2296 /* Use the MAC filtering table allocated in vtnet_attach. */ 2297 filter = sc->vtnet_macfilter; 2298 memset(filter, 0, sizeof(struct vtnet_mac_filter)); 2299 2300 /* Unicast MAC addresses: */ 2301 //if_addr_rlock(ifp); 2302 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 2303 ifa = ifac->ifa; 2304 if (ifa->ifa_addr->sa_family != AF_LINK) 2305 continue; 2306 else if (memcmp(LLADDR((struct sockaddr_dl *)ifa->ifa_addr), 2307 sc->vtnet_hwaddr, ETHER_ADDR_LEN) == 0) 2308 continue; 2309 else if (ucnt == VTNET_MAX_MAC_ENTRIES) { 2310 promisc = 1; 2311 break; 2312 } 2313 2314 bcopy(LLADDR((struct sockaddr_dl *)ifa->ifa_addr), 2315 &filter->vmf_unicast.macs[ucnt], ETHER_ADDR_LEN); 2316 ucnt++; 2317 } 2318 //if_addr_runlock(ifp); 2319 2320 if (promisc != 0) { 2321 filter->vmf_unicast.nentries = 0; 2322 if_printf(ifp, "more than %d MAC addresses assigned, " 2323 "falling back to promiscuous mode\n", 2324 VTNET_MAX_MAC_ENTRIES); 2325 } else 2326 filter->vmf_unicast.nentries = ucnt; 2327 2328 /* Multicast MAC addresses: */ 2329 //if_maddr_rlock(ifp); 2330 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 2331 if (ifma->ifma_addr->sa_family != AF_LINK) 2332 continue; 2333 else if (mcnt == VTNET_MAX_MAC_ENTRIES) { 2334 allmulti = 1; 2335 break; 2336 } 2337 2338 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 2339 &filter->vmf_multicast.macs[mcnt], ETHER_ADDR_LEN); 2340 mcnt++; 2341 } 2342 //if_maddr_runlock(ifp); 2343 2344 if (allmulti != 0) { 2345 filter->vmf_multicast.nentries = 0; 2346 if_printf(ifp, "more than %d multicast MAC addresses " 2347 "assigned, falling back to all-multicast mode\n", 2348 VTNET_MAX_MAC_ENTRIES); 2349 } else 2350 filter->vmf_multicast.nentries = mcnt; 2351 2352 if (promisc != 0 && allmulti != 0) 2353 goto out; 2354 2355 hdr.class = VIRTIO_NET_CTRL_MAC; 2356 hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET; 2357 ack = VIRTIO_NET_ERR; 2358 2359 sglist_init(&sg, 4, segs); 2360 error = 0; 2361 error |= sglist_append(&sg, &hdr, sizeof(struct virtio_net_ctrl_hdr)); 2362 error |= sglist_append(&sg, &filter->vmf_unicast, 2363 sizeof(uint32_t) + filter->vmf_unicast.nentries * ETHER_ADDR_LEN); 2364 error |= sglist_append(&sg, &filter->vmf_multicast, 2365 sizeof(uint32_t) + filter->vmf_multicast.nentries * ETHER_ADDR_LEN); 2366 error |= sglist_append(&sg, &ack, sizeof(uint8_t)); 2367 KASSERT(error == 0 && sg.sg_nseg == 4, 2368 ("%s: error %d adding MAC filter msg to sglist", __func__, error)); 2369 2370 vtnet_exec_ctrl_cmd(sc, &ack, &sg, sg.sg_nseg - 1, 1); 2371 2372 if (ack != VIRTIO_NET_OK) 2373 if_printf(ifp, "error setting host MAC filter table\n"); 2374 2375 out: 2376 if (promisc != 0 && vtnet_set_promisc(sc, 1) != 0) 2377 if_printf(ifp, "cannot enable promiscuous mode\n"); 2378 if (allmulti != 0 && vtnet_set_allmulti(sc, 1) != 0) 2379 if_printf(ifp, "cannot enable all-multicast mode\n"); 2380 } 2381 2382 static int 2383 vtnet_exec_vlan_filter(struct vtnet_softc *sc, int add, uint16_t tag) 2384 { 2385 struct sglist_seg segs[3]; 2386 struct sglist sg; 2387 struct { 2388 struct virtio_net_ctrl_hdr hdr __aligned(2); 2389 uint8_t pad1; 2390 uint16_t tag; 2391 uint8_t pad2; 2392 uint8_t ack; 2393 } s; 2394 int error; 2395 2396 s.hdr.class = VIRTIO_NET_CTRL_VLAN; 2397 s.hdr.cmd = add ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL; 2398 s.tag = tag; 2399 s.ack = VIRTIO_NET_ERR; 2400 2401 sglist_init(&sg, 3, segs); 2402 error = 0; 2403 error |= sglist_append(&sg, &s.hdr, sizeof(struct virtio_net_ctrl_hdr)); 2404 error |= sglist_append(&sg, &s.tag, sizeof(uint16_t)); 2405 error |= sglist_append(&sg, &s.ack, sizeof(uint8_t)); 2406 KASSERT(error == 0 && sg.sg_nseg == 3, 2407 ("%s: error %d adding VLAN message to sglist", __func__, error)); 2408 2409 vtnet_exec_ctrl_cmd(sc, &s.ack, &sg, sg.sg_nseg - 1, 1); 2410 2411 return (s.ack == VIRTIO_NET_OK ? 0 : EIO); 2412 } 2413 2414 static void 2415 vtnet_rx_filter_vlan(struct vtnet_softc *sc) 2416 { 2417 uint32_t w; 2418 uint16_t tag; 2419 int i, bit, nvlans; 2420 2421 ASSERT_SERIALIZED(&sc->vtnet_slz); 2422 KASSERT(sc->vtnet_flags & VTNET_FLAG_VLAN_FILTER, 2423 ("%s: VLAN_FILTER feature not negotiated", __func__)); 2424 2425 nvlans = sc->vtnet_nvlans; 2426 2427 /* Enable the filter for each configured VLAN. */ 2428 for (i = 0; i < VTNET_VLAN_SHADOW_SIZE && nvlans > 0; i++) { 2429 w = sc->vtnet_vlan_shadow[i]; 2430 while ((bit = ffs(w) - 1) != -1) { 2431 w &= ~(1 << bit); 2432 tag = sizeof(w) * CHAR_BIT * i + bit; 2433 nvlans--; 2434 2435 if (vtnet_exec_vlan_filter(sc, 1, tag) != 0) { 2436 device_printf(sc->vtnet_dev, 2437 "cannot enable VLAN %d filter\n", tag); 2438 } 2439 } 2440 } 2441 2442 KASSERT(nvlans == 0, ("VLAN count incorrect")); 2443 } 2444 2445 static void 2446 vtnet_update_vlan_filter(struct vtnet_softc *sc, int add, uint16_t tag) 2447 { 2448 struct ifnet *ifp; 2449 int idx, bit; 2450 2451 ifp = sc->vtnet_ifp; 2452 idx = (tag >> 5) & 0x7F; 2453 bit = tag & 0x1F; 2454 2455 if (tag == 0 || tag > 4095) 2456 return; 2457 2458 lwkt_serialize_enter(&sc->vtnet_slz); 2459 2460 /* Update shadow VLAN table. */ 2461 if (add) { 2462 sc->vtnet_nvlans++; 2463 sc->vtnet_vlan_shadow[idx] |= (1 << bit); 2464 } else { 2465 sc->vtnet_nvlans--; 2466 sc->vtnet_vlan_shadow[idx] &= ~(1 << bit); 2467 } 2468 2469 if (ifp->if_capenable & IFCAP_VLAN_HWFILTER && 2470 vtnet_exec_vlan_filter(sc, add, tag) != 0) { 2471 device_printf(sc->vtnet_dev, 2472 "cannot %s VLAN %d %s the host filter table\n", 2473 add ? "add" : "remove", tag, add ? "to" : "from"); 2474 } 2475 2476 lwkt_serialize_exit(&sc->vtnet_slz); 2477 } 2478 2479 static void 2480 vtnet_register_vlan(void *arg, struct ifnet *ifp, uint16_t tag) 2481 { 2482 2483 if (ifp->if_softc != arg) 2484 return; 2485 2486 vtnet_update_vlan_filter(arg, 1, tag); 2487 } 2488 2489 static void 2490 vtnet_unregister_vlan(void *arg, struct ifnet *ifp, uint16_t tag) 2491 { 2492 2493 if (ifp->if_softc != arg) 2494 return; 2495 2496 vtnet_update_vlan_filter(arg, 0, tag); 2497 } 2498 2499 static int 2500 vtnet_ifmedia_upd(struct ifnet *ifp) 2501 { 2502 struct vtnet_softc *sc; 2503 struct ifmedia *ifm; 2504 2505 sc = ifp->if_softc; 2506 ifm = &sc->vtnet_media; 2507 2508 if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER) 2509 return (EINVAL); 2510 2511 return (0); 2512 } 2513 2514 static void 2515 vtnet_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr) 2516 { 2517 struct vtnet_softc *sc; 2518 2519 sc = ifp->if_softc; 2520 2521 ifmr->ifm_status = IFM_AVALID; 2522 ifmr->ifm_active = IFM_ETHER; 2523 2524 lwkt_serialize_enter(&sc->vtnet_slz); 2525 if (vtnet_is_link_up(sc) != 0) { 2526 ifmr->ifm_status |= IFM_ACTIVE; 2527 ifmr->ifm_active |= VTNET_MEDIATYPE; 2528 } else 2529 ifmr->ifm_active |= IFM_NONE; 2530 lwkt_serialize_exit(&sc->vtnet_slz); 2531 } 2532 2533 static void 2534 vtnet_add_statistics(struct vtnet_softc *sc) 2535 { 2536 device_t dev; 2537 struct vtnet_statistics *stats; 2538 struct sysctl_ctx_list *ctx; 2539 struct sysctl_oid *tree; 2540 struct sysctl_oid_list *child; 2541 2542 dev = sc->vtnet_dev; 2543 stats = &sc->vtnet_stats; 2544 ctx = device_get_sysctl_ctx(dev); 2545 tree = device_get_sysctl_tree(dev); 2546 child = SYSCTL_CHILDREN(tree); 2547 2548 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "mbuf_alloc_failed", 2549 CTLFLAG_RD, &stats->mbuf_alloc_failed, 0, 2550 "Mbuf cluster allocation failures"); 2551 2552 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_frame_too_large", 2553 CTLFLAG_RD, &stats->rx_frame_too_large, 0, 2554 "Received frame larger than the mbuf chain"); 2555 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_enq_replacement_failed", 2556 CTLFLAG_RD, &stats->rx_enq_replacement_failed, 0, 2557 "Enqueuing the replacement receive mbuf failed"); 2558 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_mergeable_failed", 2559 CTLFLAG_RD, &stats->rx_mergeable_failed, 0, 2560 "Mergeable buffers receive failures"); 2561 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_csum_bad_ethtype", 2562 CTLFLAG_RD, &stats->rx_csum_bad_ethtype, 0, 2563 "Received checksum offloaded buffer with unsupported " 2564 "Ethernet type"); 2565 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_csum_bad_ipproto", 2566 CTLFLAG_RD, &stats->rx_csum_bad_ipproto, 0, 2567 "Received checksum offloaded buffer with incorrect IP protocol"); 2568 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_csum_bad_offset", 2569 CTLFLAG_RD, &stats->rx_csum_bad_offset, 0, 2570 "Received checksum offloaded buffer with incorrect offset"); 2571 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_csum_failed", 2572 CTLFLAG_RD, &stats->rx_csum_failed, 0, 2573 "Received buffer checksum offload failed"); 2574 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_csum_offloaded", 2575 CTLFLAG_RD, &stats->rx_csum_offloaded, 0, 2576 "Received buffer checksum offload succeeded"); 2577 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "rx_task_rescheduled", 2578 CTLFLAG_RD, &stats->rx_task_rescheduled, 0, 2579 "Times the receive interrupt task rescheduled itself"); 2580 2581 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_csum_bad_ethtype", 2582 CTLFLAG_RD, &stats->tx_csum_bad_ethtype, 0, 2583 "Aborted transmit of checksum offloaded buffer with unknown " 2584 "Ethernet type"); 2585 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_tso_bad_ethtype", 2586 CTLFLAG_RD, &stats->tx_tso_bad_ethtype, 0, 2587 "Aborted transmit of TSO buffer with unknown Ethernet type"); 2588 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_defragged", 2589 CTLFLAG_RD, &stats->tx_defragged, 0, 2590 "Transmit mbufs defragged"); 2591 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_defrag_failed", 2592 CTLFLAG_RD, &stats->tx_defrag_failed, 0, 2593 "Aborted transmit of buffer because defrag failed"); 2594 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_csum_offloaded", 2595 CTLFLAG_RD, &stats->tx_csum_offloaded, 0, 2596 "Offloaded checksum of transmitted buffer"); 2597 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_tso_offloaded", 2598 CTLFLAG_RD, &stats->tx_tso_offloaded, 0, 2599 "Segmentation offload of transmitted buffer"); 2600 SYSCTL_ADD_UQUAD(ctx, child, OID_AUTO, "tx_task_rescheduled", 2601 CTLFLAG_RD, &stats->tx_task_rescheduled, 0, 2602 "Times the transmit interrupt task rescheduled itself"); 2603 } 2604 2605 static int 2606 vtnet_enable_rx_intr(struct vtnet_softc *sc) 2607 { 2608 2609 return (virtqueue_enable_intr(sc->vtnet_rx_vq)); 2610 } 2611 2612 static void 2613 vtnet_disable_rx_intr(struct vtnet_softc *sc) 2614 { 2615 2616 virtqueue_disable_intr(sc->vtnet_rx_vq); 2617 } 2618 2619 static int 2620 vtnet_enable_tx_intr(struct vtnet_softc *sc) 2621 { 2622 2623 #ifdef VTNET_TX_INTR_MODERATION 2624 return (0); 2625 #else 2626 return (virtqueue_enable_intr(sc->vtnet_tx_vq)); 2627 #endif 2628 } 2629 2630 static void 2631 vtnet_disable_tx_intr(struct vtnet_softc *sc) 2632 { 2633 2634 virtqueue_disable_intr(sc->vtnet_tx_vq); 2635 } 2636