if_vioif.c revision 1.11.2.8
1 /* $NetBSD: if_vioif.c,v 1.11.2.8 2016/12/05 10:55:02 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 2010 Minoura Makoto. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: if_vioif.c,v 1.11.2.8 2016/12/05 10:55:02 skrll Exp $"); 30 31 #ifdef _KERNEL_OPT 32 #include "opt_net_mpsafe.h" 33 #endif 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/bus.h> 39 #include <sys/condvar.h> 40 #include <sys/device.h> 41 #include <sys/intr.h> 42 #include <sys/kmem.h> 43 #include <sys/mbuf.h> 44 #include <sys/mutex.h> 45 #include <sys/sockio.h> 46 #include <sys/cpu.h> 47 #include <sys/module.h> 48 49 #include <dev/pci/pcidevs.h> 50 #include <dev/pci/pcireg.h> 51 #include <dev/pci/pcivar.h> 52 #include <dev/pci/virtioreg.h> 53 #include <dev/pci/virtiovar.h> 54 55 #include <net/if.h> 56 #include <net/if_media.h> 57 #include <net/if_ether.h> 58 59 #include <net/bpf.h> 60 61 #include "ioconf.h" 62 63 #ifdef NET_MPSAFE 64 #define VIOIF_MPSAFE 1 65 #endif 66 67 #ifdef SOFTINT_INTR 68 #define VIOIF_SOFTINT_INTR 1 69 #endif 70 71 /* 72 * if_vioifreg.h: 73 */ 74 /* Configuration registers */ 75 #define VIRTIO_NET_CONFIG_MAC 0 /* 8bit x 6byte */ 76 #define VIRTIO_NET_CONFIG_STATUS 6 /* 16bit */ 77 78 /* Feature bits */ 79 #define VIRTIO_NET_F_CSUM (1<<0) 80 #define VIRTIO_NET_F_GUEST_CSUM (1<<1) 81 #define VIRTIO_NET_F_MAC (1<<5) 82 #define VIRTIO_NET_F_GSO (1<<6) 83 #define VIRTIO_NET_F_GUEST_TSO4 (1<<7) 84 #define VIRTIO_NET_F_GUEST_TSO6 (1<<8) 85 #define VIRTIO_NET_F_GUEST_ECN (1<<9) 86 #define VIRTIO_NET_F_GUEST_UFO (1<<10) 87 #define VIRTIO_NET_F_HOST_TSO4 (1<<11) 88 #define VIRTIO_NET_F_HOST_TSO6 (1<<12) 89 #define VIRTIO_NET_F_HOST_ECN (1<<13) 90 #define VIRTIO_NET_F_HOST_UFO (1<<14) 91 #define VIRTIO_NET_F_MRG_RXBUF (1<<15) 92 #define VIRTIO_NET_F_STATUS (1<<16) 93 #define VIRTIO_NET_F_CTRL_VQ (1<<17) 94 #define VIRTIO_NET_F_CTRL_RX (1<<18) 95 #define VIRTIO_NET_F_CTRL_VLAN (1<<19) 96 97 #define VIRTIO_NET_FLAG_BITS \ 98 VIRTIO_COMMON_FLAG_BITS \ 99 "\x14""CTRL_VLAN" \ 100 "\x13""CTRL_RX" \ 101 "\x12""CTRL_VQ" \ 102 "\x11""STATUS" \ 103 "\x10""MRG_RXBUF" \ 104 "\x0f""HOST_UFO" \ 105 "\x0e""HOST_ECN" \ 106 "\x0d""HOST_TSO6" \ 107 "\x0c""HOST_TSO4" \ 108 "\x0b""GUEST_UFO" \ 109 "\x0a""GUEST_ECN" \ 110 "\x09""GUEST_TSO6" \ 111 "\x08""GUEST_TSO4" \ 112 "\x07""GSO" \ 113 "\x06""MAC" \ 114 "\x02""GUEST_CSUM" \ 115 "\x01""CSUM" 116 117 /* Status */ 118 #define VIRTIO_NET_S_LINK_UP 1 119 120 /* Packet header structure */ 121 struct virtio_net_hdr { 122 uint8_t flags; 123 uint8_t gso_type; 124 uint16_t hdr_len; 125 uint16_t gso_size; 126 uint16_t csum_start; 127 uint16_t csum_offset; 128 #if 0 129 uint16_t num_buffers; /* if VIRTIO_NET_F_MRG_RXBUF enabled */ 130 #endif 131 } __packed; 132 133 #define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 /* flags */ 134 #define VIRTIO_NET_HDR_GSO_NONE 0 /* gso_type */ 135 #define VIRTIO_NET_HDR_GSO_TCPV4 1 /* gso_type */ 136 #define VIRTIO_NET_HDR_GSO_UDP 3 /* gso_type */ 137 #define VIRTIO_NET_HDR_GSO_TCPV6 4 /* gso_type */ 138 #define VIRTIO_NET_HDR_GSO_ECN 0x80 /* gso_type, |'ed */ 139 140 #define VIRTIO_NET_MAX_GSO_LEN (65536+ETHER_HDR_LEN) 141 142 /* Control virtqueue */ 143 struct virtio_net_ctrl_cmd { 144 uint8_t class; 145 uint8_t command; 146 } __packed; 147 #define VIRTIO_NET_CTRL_RX 0 148 # define VIRTIO_NET_CTRL_RX_PROMISC 0 149 # define VIRTIO_NET_CTRL_RX_ALLMULTI 1 150 151 #define VIRTIO_NET_CTRL_MAC 1 152 # define VIRTIO_NET_CTRL_MAC_TABLE_SET 0 153 154 #define VIRTIO_NET_CTRL_VLAN 2 155 # define VIRTIO_NET_CTRL_VLAN_ADD 0 156 # define VIRTIO_NET_CTRL_VLAN_DEL 1 157 158 struct virtio_net_ctrl_status { 159 uint8_t ack; 160 } __packed; 161 #define VIRTIO_NET_OK 0 162 #define VIRTIO_NET_ERR 1 163 164 struct virtio_net_ctrl_rx { 165 uint8_t onoff; 166 } __packed; 167 168 struct virtio_net_ctrl_mac_tbl { 169 uint32_t nentries; 170 uint8_t macs[][ETHER_ADDR_LEN]; 171 } __packed; 172 173 struct virtio_net_ctrl_vlan { 174 uint16_t id; 175 } __packed; 176 177 178 /* 179 * if_vioifvar.h: 180 */ 181 struct vioif_softc { 182 device_t sc_dev; 183 184 struct virtio_softc *sc_virtio; 185 struct virtqueue sc_vq[3]; 186 #define VQ_RX 0 187 #define VQ_TX 1 188 #define VQ_CTRL 2 189 190 uint8_t sc_mac[ETHER_ADDR_LEN]; 191 struct ethercom sc_ethercom; 192 short sc_deferred_init_done; 193 194 /* bus_dmamem */ 195 bus_dma_segment_t sc_hdr_segs[1]; 196 struct virtio_net_hdr *sc_hdrs; 197 #define sc_rx_hdrs sc_hdrs 198 struct virtio_net_hdr *sc_tx_hdrs; 199 struct virtio_net_ctrl_cmd *sc_ctrl_cmd; 200 struct virtio_net_ctrl_status *sc_ctrl_status; 201 struct virtio_net_ctrl_rx *sc_ctrl_rx; 202 struct virtio_net_ctrl_mac_tbl *sc_ctrl_mac_tbl_uc; 203 struct virtio_net_ctrl_mac_tbl *sc_ctrl_mac_tbl_mc; 204 205 /* kmem */ 206 bus_dmamap_t *sc_arrays; 207 #define sc_rxhdr_dmamaps sc_arrays 208 bus_dmamap_t *sc_txhdr_dmamaps; 209 bus_dmamap_t *sc_rx_dmamaps; 210 bus_dmamap_t *sc_tx_dmamaps; 211 struct mbuf **sc_rx_mbufs; 212 struct mbuf **sc_tx_mbufs; 213 214 bus_dmamap_t sc_ctrl_cmd_dmamap; 215 bus_dmamap_t sc_ctrl_status_dmamap; 216 bus_dmamap_t sc_ctrl_rx_dmamap; 217 bus_dmamap_t sc_ctrl_tbl_uc_dmamap; 218 bus_dmamap_t sc_ctrl_tbl_mc_dmamap; 219 220 void *sc_rx_softint; 221 222 enum { 223 FREE, INUSE, DONE 224 } sc_ctrl_inuse; 225 kcondvar_t sc_ctrl_wait; 226 kmutex_t sc_ctrl_wait_lock; 227 kmutex_t *sc_tx_lock; 228 kmutex_t *sc_rx_lock; 229 bool sc_stopping; 230 }; 231 #define VIRTIO_NET_TX_MAXNSEGS (16) /* XXX */ 232 #define VIRTIO_NET_CTRL_MAC_MAXENTRIES (64) /* XXX */ 233 234 #define VIOIF_TX_LOCK(_sc) if ((_sc)->sc_tx_lock) mutex_enter((_sc)->sc_tx_lock) 235 #define VIOIF_TX_UNLOCK(_sc) if ((_sc)->sc_tx_lock) mutex_exit((_sc)->sc_tx_lock) 236 #define VIOIF_TX_LOCKED(_sc) (!(_sc)->sc_tx_lock || mutex_owned((_sc)->sc_tx_lock)) 237 #define VIOIF_RX_LOCK(_sc) if ((_sc)->sc_rx_lock) mutex_enter((_sc)->sc_rx_lock) 238 #define VIOIF_RX_UNLOCK(_sc) if ((_sc)->sc_rx_lock) mutex_exit((_sc)->sc_rx_lock) 239 #define VIOIF_RX_LOCKED(_sc) (!(_sc)->sc_rx_lock || mutex_owned((_sc)->sc_rx_lock)) 240 241 /* cfattach interface functions */ 242 static int vioif_match(device_t, cfdata_t, void *); 243 static void vioif_attach(device_t, device_t, void *); 244 static void vioif_deferred_init(device_t); 245 246 /* ifnet interface functions */ 247 static int vioif_init(struct ifnet *); 248 static void vioif_stop(struct ifnet *, int); 249 static void vioif_start(struct ifnet *); 250 static int vioif_ioctl(struct ifnet *, u_long, void *); 251 static void vioif_watchdog(struct ifnet *); 252 253 /* rx */ 254 static int vioif_add_rx_mbuf(struct vioif_softc *, int); 255 static void vioif_free_rx_mbuf(struct vioif_softc *, int); 256 static void vioif_populate_rx_mbufs(struct vioif_softc *); 257 static void vioif_populate_rx_mbufs_locked(struct vioif_softc *); 258 static int vioif_rx_deq(struct vioif_softc *); 259 static int vioif_rx_deq_locked(struct vioif_softc *); 260 static int vioif_rx_vq_done(struct virtqueue *); 261 static void vioif_rx_softint(void *); 262 static void vioif_rx_drain(struct vioif_softc *); 263 264 /* tx */ 265 static int vioif_tx_vq_done(struct virtqueue *); 266 static int vioif_tx_vq_done_locked(struct virtqueue *); 267 static void vioif_tx_drain(struct vioif_softc *); 268 269 /* other control */ 270 static int vioif_updown(struct vioif_softc *, bool); 271 static int vioif_ctrl_rx(struct vioif_softc *, int, bool); 272 static int vioif_set_promisc(struct vioif_softc *, bool); 273 static int vioif_set_allmulti(struct vioif_softc *, bool); 274 static int vioif_set_rx_filter(struct vioif_softc *); 275 static int vioif_rx_filter(struct vioif_softc *); 276 static int vioif_ctrl_vq_done(struct virtqueue *); 277 278 CFATTACH_DECL_NEW(vioif, sizeof(struct vioif_softc), 279 vioif_match, vioif_attach, NULL, NULL); 280 281 static int 282 vioif_match(device_t parent, cfdata_t match, void *aux) 283 { 284 struct virtio_softc *va = aux; 285 286 if (va->sc_childdevid == PCI_PRODUCT_VIRTIO_NETWORK) 287 return 1; 288 289 return 0; 290 } 291 292 /* allocate memory */ 293 /* 294 * dma memory is used for: 295 * sc_rx_hdrs[slot]: metadata array for recieved frames (READ) 296 * sc_tx_hdrs[slot]: metadata array for frames to be sent (WRITE) 297 * sc_ctrl_cmd: command to be sent via ctrl vq (WRITE) 298 * sc_ctrl_status: return value for a command via ctrl vq (READ) 299 * sc_ctrl_rx: parameter for a VIRTIO_NET_CTRL_RX class command 300 * (WRITE) 301 * sc_ctrl_mac_tbl_uc: unicast MAC address filter for a VIRTIO_NET_CTRL_MAC 302 * class command (WRITE) 303 * sc_ctrl_mac_tbl_mc: multicast MAC address filter for a VIRTIO_NET_CTRL_MAC 304 * class command (WRITE) 305 * sc_ctrl_* structures are allocated only one each; they are protected by 306 * sc_ctrl_inuse variable and sc_ctrl_wait condvar. 307 */ 308 /* 309 * dynamically allocated memory is used for: 310 * sc_rxhdr_dmamaps[slot]: bus_dmamap_t array for sc_rx_hdrs[slot] 311 * sc_txhdr_dmamaps[slot]: bus_dmamap_t array for sc_tx_hdrs[slot] 312 * sc_rx_dmamaps[slot]: bus_dmamap_t array for recieved payload 313 * sc_tx_dmamaps[slot]: bus_dmamap_t array for sent payload 314 * sc_rx_mbufs[slot]: mbuf pointer array for recieved frames 315 * sc_tx_mbufs[slot]: mbuf pointer array for sent frames 316 */ 317 static int 318 vioif_alloc_mems(struct vioif_softc *sc) 319 { 320 struct virtio_softc *vsc = sc->sc_virtio; 321 int allocsize, allocsize2, r, rsegs, i; 322 void *vaddr; 323 intptr_t p; 324 int rxqsize, txqsize; 325 326 rxqsize = vsc->sc_vqs[VQ_RX].vq_num; 327 txqsize = vsc->sc_vqs[VQ_TX].vq_num; 328 329 allocsize = sizeof(struct virtio_net_hdr) * rxqsize; 330 allocsize += sizeof(struct virtio_net_hdr) * txqsize; 331 if (vsc->sc_nvqs == 3) { 332 allocsize += sizeof(struct virtio_net_ctrl_cmd) * 1; 333 allocsize += sizeof(struct virtio_net_ctrl_status) * 1; 334 allocsize += sizeof(struct virtio_net_ctrl_rx) * 1; 335 allocsize += sizeof(struct virtio_net_ctrl_mac_tbl) 336 + sizeof(struct virtio_net_ctrl_mac_tbl) 337 + ETHER_ADDR_LEN * VIRTIO_NET_CTRL_MAC_MAXENTRIES; 338 } 339 r = bus_dmamem_alloc(vsc->sc_dmat, allocsize, 0, 0, 340 &sc->sc_hdr_segs[0], 1, &rsegs, BUS_DMA_NOWAIT); 341 if (r != 0) { 342 aprint_error_dev(sc->sc_dev, 343 "DMA memory allocation failed, size %d, " 344 "error code %d\n", allocsize, r); 345 goto err_none; 346 } 347 r = bus_dmamem_map(vsc->sc_dmat, 348 &sc->sc_hdr_segs[0], 1, allocsize, 349 &vaddr, BUS_DMA_NOWAIT); 350 if (r != 0) { 351 aprint_error_dev(sc->sc_dev, 352 "DMA memory map failed, " 353 "error code %d\n", r); 354 goto err_dmamem_alloc; 355 } 356 sc->sc_hdrs = vaddr; 357 memset(vaddr, 0, allocsize); 358 p = (intptr_t) vaddr; 359 p += sizeof(struct virtio_net_hdr) * rxqsize; 360 #define P(name,size) do { sc->sc_ ##name = (void*) p; \ 361 p += size; } while (0) 362 P(tx_hdrs, sizeof(struct virtio_net_hdr) * txqsize); 363 if (vsc->sc_nvqs == 3) { 364 P(ctrl_cmd, sizeof(struct virtio_net_ctrl_cmd)); 365 P(ctrl_status, sizeof(struct virtio_net_ctrl_status)); 366 P(ctrl_rx, sizeof(struct virtio_net_ctrl_rx)); 367 P(ctrl_mac_tbl_uc, sizeof(struct virtio_net_ctrl_mac_tbl)); 368 P(ctrl_mac_tbl_mc, 369 (sizeof(struct virtio_net_ctrl_mac_tbl) 370 + ETHER_ADDR_LEN * VIRTIO_NET_CTRL_MAC_MAXENTRIES)); 371 } 372 #undef P 373 374 allocsize2 = sizeof(bus_dmamap_t) * (rxqsize + txqsize); 375 allocsize2 += sizeof(bus_dmamap_t) * (rxqsize + txqsize); 376 allocsize2 += sizeof(struct mbuf*) * (rxqsize + txqsize); 377 sc->sc_arrays = kmem_zalloc(allocsize2, KM_SLEEP); 378 if (sc->sc_arrays == NULL) 379 goto err_dmamem_map; 380 sc->sc_txhdr_dmamaps = sc->sc_arrays + rxqsize; 381 sc->sc_rx_dmamaps = sc->sc_txhdr_dmamaps + txqsize; 382 sc->sc_tx_dmamaps = sc->sc_rx_dmamaps + rxqsize; 383 sc->sc_rx_mbufs = (void*) (sc->sc_tx_dmamaps + txqsize); 384 sc->sc_tx_mbufs = sc->sc_rx_mbufs + rxqsize; 385 386 #define C(map, buf, size, nsegs, rw, usage) \ 387 do { \ 388 r = bus_dmamap_create(vsc->sc_dmat, size, nsegs, size, 0, \ 389 BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW, \ 390 &sc->sc_ ##map); \ 391 if (r != 0) { \ 392 aprint_error_dev(sc->sc_dev, \ 393 usage " dmamap creation failed, " \ 394 "error code %d\n", r); \ 395 goto err_reqs; \ 396 } \ 397 } while (0) 398 #define C_L1(map, buf, size, nsegs, rw, usage) \ 399 C(map, buf, size, nsegs, rw, usage); \ 400 do { \ 401 r = bus_dmamap_load(vsc->sc_dmat, sc->sc_ ##map, \ 402 &sc->sc_ ##buf, size, NULL, \ 403 BUS_DMA_ ##rw | BUS_DMA_NOWAIT); \ 404 if (r != 0) { \ 405 aprint_error_dev(sc->sc_dev, \ 406 usage " dmamap load failed, " \ 407 "error code %d\n", r); \ 408 goto err_reqs; \ 409 } \ 410 } while (0) 411 #define C_L2(map, buf, size, nsegs, rw, usage) \ 412 C(map, buf, size, nsegs, rw, usage); \ 413 do { \ 414 r = bus_dmamap_load(vsc->sc_dmat, sc->sc_ ##map, \ 415 sc->sc_ ##buf, size, NULL, \ 416 BUS_DMA_ ##rw | BUS_DMA_NOWAIT); \ 417 if (r != 0) { \ 418 aprint_error_dev(sc->sc_dev, \ 419 usage " dmamap load failed, " \ 420 "error code %d\n", r); \ 421 goto err_reqs; \ 422 } \ 423 } while (0) 424 for (i = 0; i < rxqsize; i++) { 425 C_L1(rxhdr_dmamaps[i], rx_hdrs[i], 426 sizeof(struct virtio_net_hdr), 1, 427 READ, "rx header"); 428 C(rx_dmamaps[i], NULL, MCLBYTES, 1, 0, "rx payload"); 429 } 430 431 for (i = 0; i < txqsize; i++) { 432 C_L1(txhdr_dmamaps[i], tx_hdrs[i], 433 sizeof(struct virtio_net_hdr), 1, 434 WRITE, "tx header"); 435 C(tx_dmamaps[i], NULL, ETHER_MAX_LEN, 16 /* XXX */, 0, 436 "tx payload"); 437 } 438 439 if (vsc->sc_nvqs == 3) { 440 /* control vq class & command */ 441 C_L2(ctrl_cmd_dmamap, ctrl_cmd, 442 sizeof(struct virtio_net_ctrl_cmd), 1, WRITE, 443 "control command"); 444 445 /* control vq status */ 446 C_L2(ctrl_status_dmamap, ctrl_status, 447 sizeof(struct virtio_net_ctrl_status), 1, READ, 448 "control status"); 449 450 /* control vq rx mode command parameter */ 451 C_L2(ctrl_rx_dmamap, ctrl_rx, 452 sizeof(struct virtio_net_ctrl_rx), 1, WRITE, 453 "rx mode control command"); 454 455 /* control vq MAC filter table for unicast */ 456 /* do not load now since its length is variable */ 457 C(ctrl_tbl_uc_dmamap, NULL, 458 sizeof(struct virtio_net_ctrl_mac_tbl) + 0, 1, WRITE, 459 "unicast MAC address filter command"); 460 461 /* control vq MAC filter table for multicast */ 462 C(ctrl_tbl_mc_dmamap, NULL, 463 (sizeof(struct virtio_net_ctrl_mac_tbl) 464 + ETHER_ADDR_LEN * VIRTIO_NET_CTRL_MAC_MAXENTRIES), 465 1, WRITE, "multicast MAC address filter command"); 466 } 467 #undef C_L2 468 #undef C_L1 469 #undef C 470 471 return 0; 472 473 err_reqs: 474 #define D(map) \ 475 do { \ 476 if (sc->sc_ ##map) { \ 477 bus_dmamap_destroy(vsc->sc_dmat, sc->sc_ ##map); \ 478 sc->sc_ ##map = NULL; \ 479 } \ 480 } while (0) 481 D(ctrl_tbl_mc_dmamap); 482 D(ctrl_tbl_uc_dmamap); 483 D(ctrl_rx_dmamap); 484 D(ctrl_status_dmamap); 485 D(ctrl_cmd_dmamap); 486 for (i = 0; i < txqsize; i++) { 487 D(tx_dmamaps[i]); 488 D(txhdr_dmamaps[i]); 489 } 490 for (i = 0; i < rxqsize; i++) { 491 D(rx_dmamaps[i]); 492 D(rxhdr_dmamaps[i]); 493 } 494 #undef D 495 if (sc->sc_arrays) { 496 kmem_free(sc->sc_arrays, allocsize2); 497 sc->sc_arrays = 0; 498 } 499 err_dmamem_map: 500 bus_dmamem_unmap(vsc->sc_dmat, sc->sc_hdrs, allocsize); 501 err_dmamem_alloc: 502 bus_dmamem_free(vsc->sc_dmat, &sc->sc_hdr_segs[0], 1); 503 err_none: 504 return -1; 505 } 506 507 static void 508 vioif_attach(device_t parent, device_t self, void *aux) 509 { 510 struct vioif_softc *sc = device_private(self); 511 struct virtio_softc *vsc = device_private(parent); 512 uint32_t features; 513 char buf[256]; 514 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 515 u_int flags; 516 int r; 517 518 if (vsc->sc_child != NULL) { 519 aprint_normal(": child already attached for %s; " 520 "something wrong...\n", 521 device_xname(parent)); 522 return; 523 } 524 525 sc->sc_dev = self; 526 sc->sc_virtio = vsc; 527 528 vsc->sc_child = self; 529 vsc->sc_ipl = IPL_NET; 530 vsc->sc_vqs = &sc->sc_vq[0]; 531 vsc->sc_config_change = NULL; 532 vsc->sc_intrhand = virtio_vq_intr; 533 vsc->sc_flags = 0; 534 535 #ifdef VIOIF_MPSAFE 536 vsc->sc_flags |= VIRTIO_F_PCI_INTR_MPSAFE; 537 #endif 538 #ifdef VIOIF_SOFTINT_INTR 539 vsc->sc_flags |= VIRTIO_F_PCI_INTR_SOFTINT; 540 #endif 541 vsc->sc_flags |= VIRTIO_F_PCI_INTR_MSIX; 542 543 features = virtio_negotiate_features(vsc, 544 (VIRTIO_NET_F_MAC | 545 VIRTIO_NET_F_STATUS | 546 VIRTIO_NET_F_CTRL_VQ | 547 VIRTIO_NET_F_CTRL_RX | 548 VIRTIO_F_NOTIFY_ON_EMPTY)); 549 if (features & VIRTIO_NET_F_MAC) { 550 sc->sc_mac[0] = virtio_read_device_config_1(vsc, 551 VIRTIO_NET_CONFIG_MAC+0); 552 sc->sc_mac[1] = virtio_read_device_config_1(vsc, 553 VIRTIO_NET_CONFIG_MAC+1); 554 sc->sc_mac[2] = virtio_read_device_config_1(vsc, 555 VIRTIO_NET_CONFIG_MAC+2); 556 sc->sc_mac[3] = virtio_read_device_config_1(vsc, 557 VIRTIO_NET_CONFIG_MAC+3); 558 sc->sc_mac[4] = virtio_read_device_config_1(vsc, 559 VIRTIO_NET_CONFIG_MAC+4); 560 sc->sc_mac[5] = virtio_read_device_config_1(vsc, 561 VIRTIO_NET_CONFIG_MAC+5); 562 } else { 563 /* code stolen from sys/net/if_tap.c */ 564 struct timeval tv; 565 uint32_t ui; 566 getmicrouptime(&tv); 567 ui = (tv.tv_sec ^ tv.tv_usec) & 0xffffff; 568 memcpy(sc->sc_mac+3, (uint8_t *)&ui, 3); 569 virtio_write_device_config_1(vsc, 570 VIRTIO_NET_CONFIG_MAC+0, 571 sc->sc_mac[0]); 572 virtio_write_device_config_1(vsc, 573 VIRTIO_NET_CONFIG_MAC+1, 574 sc->sc_mac[1]); 575 virtio_write_device_config_1(vsc, 576 VIRTIO_NET_CONFIG_MAC+2, 577 sc->sc_mac[2]); 578 virtio_write_device_config_1(vsc, 579 VIRTIO_NET_CONFIG_MAC+3, 580 sc->sc_mac[3]); 581 virtio_write_device_config_1(vsc, 582 VIRTIO_NET_CONFIG_MAC+4, 583 sc->sc_mac[4]); 584 virtio_write_device_config_1(vsc, 585 VIRTIO_NET_CONFIG_MAC+5, 586 sc->sc_mac[5]); 587 } 588 aprint_normal(": Ethernet address %s\n", ether_sprintf(sc->sc_mac)); 589 snprintb(buf, sizeof(buf), VIRTIO_NET_FLAG_BITS, features); 590 aprint_normal_dev(self, "Features: %s\n", buf); 591 aprint_naive("\n"); 592 593 #ifdef VIOIF_MPSAFE 594 sc->sc_tx_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NET); 595 sc->sc_rx_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NET); 596 #else 597 sc->sc_tx_lock = NULL; 598 sc->sc_rx_lock = NULL; 599 #endif 600 sc->sc_stopping = false; 601 602 /* 603 * Allocating a virtqueue for Rx 604 */ 605 r = virtio_alloc_vq(vsc, &sc->sc_vq[VQ_RX], 0, 606 MCLBYTES+sizeof(struct virtio_net_hdr), 2, "rx"); 607 if (r != 0) 608 goto err; 609 vsc->sc_nvqs = 1; 610 sc->sc_vq[VQ_RX].vq_done = vioif_rx_vq_done; 611 612 /* 613 * Allocating a virtqueue for Tx 614 */ 615 r = virtio_alloc_vq(vsc, &sc->sc_vq[VQ_TX], 1, 616 (sizeof(struct virtio_net_hdr) + (ETHER_MAX_LEN - ETHER_HDR_LEN)), 617 VIRTIO_NET_TX_MAXNSEGS + 1, "tx"); 618 if (r != 0) 619 goto err; 620 vsc->sc_nvqs = 2; 621 sc->sc_vq[VQ_TX].vq_done = vioif_tx_vq_done; 622 623 virtio_start_vq_intr(vsc, &sc->sc_vq[VQ_RX]); 624 virtio_stop_vq_intr(vsc, &sc->sc_vq[VQ_TX]); /* not urgent; do it later */ 625 626 if ((features & VIRTIO_NET_F_CTRL_VQ) && 627 (features & VIRTIO_NET_F_CTRL_RX)) { 628 /* 629 * Allocating a virtqueue for control channel 630 */ 631 r = virtio_alloc_vq(vsc, &sc->sc_vq[VQ_CTRL], 2, 632 NBPG, 1, "control"); 633 if (r != 0) { 634 aprint_error_dev(self, "failed to allocate " 635 "a virtqueue for control channel\n"); 636 goto skip; 637 } 638 639 sc->sc_vq[VQ_CTRL].vq_done = vioif_ctrl_vq_done; 640 cv_init(&sc->sc_ctrl_wait, "ctrl_vq"); 641 mutex_init(&sc->sc_ctrl_wait_lock, MUTEX_DEFAULT, IPL_NET); 642 sc->sc_ctrl_inuse = FREE; 643 virtio_start_vq_intr(vsc, &sc->sc_vq[VQ_CTRL]); 644 vsc->sc_nvqs = 3; 645 } 646 skip: 647 648 #ifdef VIOIF_MPSAFE 649 flags = SOFTINT_NET | SOFTINT_MPSAFE; 650 #else 651 flags = SOFTINT_NET; 652 #endif 653 sc->sc_rx_softint = softint_establish(flags, vioif_rx_softint, sc); 654 if (sc->sc_rx_softint == NULL) { 655 aprint_error_dev(self, "cannot establish softint\n"); 656 goto err; 657 } 658 659 if (vioif_alloc_mems(sc) < 0) 660 goto err; 661 662 strlcpy(ifp->if_xname, device_xname(self), IFNAMSIZ); 663 ifp->if_softc = sc; 664 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 665 ifp->if_start = vioif_start; 666 ifp->if_ioctl = vioif_ioctl; 667 ifp->if_init = vioif_init; 668 ifp->if_stop = vioif_stop; 669 ifp->if_capabilities = 0; 670 ifp->if_watchdog = vioif_watchdog; 671 672 sc->sc_ethercom.ec_capabilities |= ETHERCAP_VLAN_MTU; 673 674 if_attach(ifp); 675 ether_ifattach(ifp, sc->sc_mac); 676 677 return; 678 679 err: 680 if (sc->sc_tx_lock) 681 mutex_obj_free(sc->sc_tx_lock); 682 if (sc->sc_rx_lock) 683 mutex_obj_free(sc->sc_rx_lock); 684 685 if (vsc->sc_nvqs == 3) { 686 cv_destroy(&sc->sc_ctrl_wait); 687 mutex_destroy(&sc->sc_ctrl_wait_lock); 688 } 689 690 while (vsc->sc_nvqs > 0) 691 virtio_free_vq(vsc, &sc->sc_vq[--vsc->sc_nvqs]); 692 693 vsc->sc_child = (void*)1; 694 return; 695 } 696 697 /* we need interrupts to make promiscuous mode off */ 698 static void 699 vioif_deferred_init(device_t self) 700 { 701 struct vioif_softc *sc = device_private(self); 702 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 703 int r; 704 705 if (ifp->if_flags & IFF_PROMISC) 706 return; 707 708 r = vioif_set_promisc(sc, false); 709 if (r != 0) 710 aprint_error_dev(self, "resetting promisc mode failed, " 711 "errror code %d\n", r); 712 } 713 714 /* 715 * Interface functions for ifnet 716 */ 717 static int 718 vioif_init(struct ifnet *ifp) 719 { 720 struct vioif_softc *sc = ifp->if_softc; 721 722 vioif_stop(ifp, 0); 723 724 if (!sc->sc_deferred_init_done) { 725 struct virtio_softc *vsc = sc->sc_virtio; 726 727 sc->sc_deferred_init_done = 1; 728 if (vsc->sc_nvqs == 3) 729 vioif_deferred_init(sc->sc_dev); 730 } 731 732 /* Have to set false before vioif_populate_rx_mbufs */ 733 sc->sc_stopping = false; 734 735 vioif_populate_rx_mbufs(sc); 736 737 vioif_updown(sc, true); 738 ifp->if_flags |= IFF_RUNNING; 739 ifp->if_flags &= ~IFF_OACTIVE; 740 vioif_rx_filter(sc); 741 742 return 0; 743 } 744 745 static void 746 vioif_stop(struct ifnet *ifp, int disable) 747 { 748 struct vioif_softc *sc = ifp->if_softc; 749 struct virtio_softc *vsc = sc->sc_virtio; 750 751 /* Take the locks to ensure that ongoing TX/RX finish */ 752 VIOIF_TX_LOCK(sc); 753 VIOIF_RX_LOCK(sc); 754 sc->sc_stopping = true; 755 VIOIF_RX_UNLOCK(sc); 756 VIOIF_TX_UNLOCK(sc); 757 758 /* only way to stop I/O and DMA is resetting... */ 759 virtio_reset(vsc); 760 vioif_rx_deq(sc); 761 vioif_tx_drain(sc); 762 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 763 764 if (disable) 765 vioif_rx_drain(sc); 766 767 virtio_reinit_start(vsc); 768 virtio_negotiate_features(vsc, vsc->sc_features); 769 virtio_start_vq_intr(vsc, &sc->sc_vq[VQ_RX]); 770 virtio_stop_vq_intr(vsc, &sc->sc_vq[VQ_TX]); 771 if (vsc->sc_nvqs >= 3) 772 virtio_start_vq_intr(vsc, &sc->sc_vq[VQ_CTRL]); 773 virtio_reinit_end(vsc); 774 vioif_updown(sc, false); 775 } 776 777 static void 778 vioif_start(struct ifnet *ifp) 779 { 780 struct vioif_softc *sc = ifp->if_softc; 781 struct virtio_softc *vsc = sc->sc_virtio; 782 struct virtqueue *vq = &sc->sc_vq[VQ_TX]; 783 struct mbuf *m; 784 int queued = 0, retry = 0; 785 786 VIOIF_TX_LOCK(sc); 787 788 if ((ifp->if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING) 789 goto out; 790 791 if (sc->sc_stopping) 792 goto out; 793 794 for (;;) { 795 int slot, r; 796 797 IFQ_DEQUEUE(&ifp->if_snd, m); 798 799 if (m == NULL) 800 break; 801 802 retry: 803 r = virtio_enqueue_prep(vsc, vq, &slot); 804 if (r == EAGAIN) { 805 ifp->if_flags |= IFF_OACTIVE; 806 vioif_tx_vq_done_locked(vq); 807 if (retry++ == 0) 808 goto retry; 809 else 810 break; 811 } 812 if (r != 0) 813 panic("enqueue_prep for a tx buffer"); 814 r = bus_dmamap_load_mbuf(vsc->sc_dmat, 815 sc->sc_tx_dmamaps[slot], 816 m, BUS_DMA_WRITE|BUS_DMA_NOWAIT); 817 if (r != 0) { 818 virtio_enqueue_abort(vsc, vq, slot); 819 aprint_error_dev(sc->sc_dev, 820 "tx dmamap load failed, error code %d\n", r); 821 break; 822 } 823 r = virtio_enqueue_reserve(vsc, vq, slot, 824 sc->sc_tx_dmamaps[slot]->dm_nsegs + 1); 825 if (r != 0) { 826 bus_dmamap_unload(vsc->sc_dmat, 827 sc->sc_tx_dmamaps[slot]); 828 ifp->if_flags |= IFF_OACTIVE; 829 vioif_tx_vq_done_locked(vq); 830 if (retry++ == 0) 831 goto retry; 832 else 833 break; 834 } 835 836 sc->sc_tx_mbufs[slot] = m; 837 838 memset(&sc->sc_tx_hdrs[slot], 0, sizeof(struct virtio_net_hdr)); 839 bus_dmamap_sync(vsc->sc_dmat, sc->sc_tx_dmamaps[slot], 840 0, sc->sc_tx_dmamaps[slot]->dm_mapsize, 841 BUS_DMASYNC_PREWRITE); 842 bus_dmamap_sync(vsc->sc_dmat, sc->sc_txhdr_dmamaps[slot], 843 0, sc->sc_txhdr_dmamaps[slot]->dm_mapsize, 844 BUS_DMASYNC_PREWRITE); 845 virtio_enqueue(vsc, vq, slot, sc->sc_txhdr_dmamaps[slot], true); 846 virtio_enqueue(vsc, vq, slot, sc->sc_tx_dmamaps[slot], true); 847 virtio_enqueue_commit(vsc, vq, slot, false); 848 queued++; 849 bpf_mtap(ifp, m); 850 } 851 852 if (m != NULL) { 853 ifp->if_flags |= IFF_OACTIVE; 854 m_freem(m); 855 } 856 857 if (queued > 0) { 858 virtio_enqueue_commit(vsc, vq, -1, true); 859 ifp->if_timer = 5; 860 } 861 862 out: 863 VIOIF_TX_UNLOCK(sc); 864 } 865 866 static int 867 vioif_ioctl(struct ifnet *ifp, u_long cmd, void *data) 868 { 869 int s, r; 870 871 s = splnet(); 872 873 r = ether_ioctl(ifp, cmd, data); 874 if ((r == 0 && cmd == SIOCSIFFLAGS) || 875 (r == ENETRESET && (cmd == SIOCADDMULTI || cmd == SIOCDELMULTI))) { 876 if (ifp->if_flags & IFF_RUNNING) 877 r = vioif_rx_filter(ifp->if_softc); 878 else 879 r = 0; 880 } 881 882 splx(s); 883 884 return r; 885 } 886 887 void 888 vioif_watchdog(struct ifnet *ifp) 889 { 890 struct vioif_softc *sc = ifp->if_softc; 891 892 if (ifp->if_flags & IFF_RUNNING) 893 vioif_tx_vq_done(&sc->sc_vq[VQ_TX]); 894 } 895 896 897 /* 898 * Recieve implementation 899 */ 900 /* allocate and initialize a mbuf for recieve */ 901 static int 902 vioif_add_rx_mbuf(struct vioif_softc *sc, int i) 903 { 904 struct mbuf *m; 905 int r; 906 907 MGETHDR(m, M_DONTWAIT, MT_DATA); 908 if (m == NULL) 909 return ENOBUFS; 910 MCLGET(m, M_DONTWAIT); 911 if ((m->m_flags & M_EXT) == 0) { 912 m_freem(m); 913 return ENOBUFS; 914 } 915 sc->sc_rx_mbufs[i] = m; 916 m->m_len = m->m_pkthdr.len = m->m_ext.ext_size; 917 r = bus_dmamap_load_mbuf(sc->sc_virtio->sc_dmat, 918 sc->sc_rx_dmamaps[i], 919 m, BUS_DMA_READ|BUS_DMA_NOWAIT); 920 if (r) { 921 m_freem(m); 922 sc->sc_rx_mbufs[i] = 0; 923 return r; 924 } 925 926 return 0; 927 } 928 929 /* free a mbuf for recieve */ 930 static void 931 vioif_free_rx_mbuf(struct vioif_softc *sc, int i) 932 { 933 bus_dmamap_unload(sc->sc_virtio->sc_dmat, sc->sc_rx_dmamaps[i]); 934 m_freem(sc->sc_rx_mbufs[i]); 935 sc->sc_rx_mbufs[i] = NULL; 936 } 937 938 /* add mbufs for all the empty recieve slots */ 939 static void 940 vioif_populate_rx_mbufs(struct vioif_softc *sc) 941 { 942 VIOIF_RX_LOCK(sc); 943 vioif_populate_rx_mbufs_locked(sc); 944 VIOIF_RX_UNLOCK(sc); 945 } 946 947 static void 948 vioif_populate_rx_mbufs_locked(struct vioif_softc *sc) 949 { 950 struct virtio_softc *vsc = sc->sc_virtio; 951 int i, r, ndone = 0; 952 struct virtqueue *vq = &sc->sc_vq[VQ_RX]; 953 954 KASSERT(VIOIF_RX_LOCKED(sc)); 955 956 if (sc->sc_stopping) 957 return; 958 959 for (i = 0; i < vq->vq_num; i++) { 960 int slot; 961 r = virtio_enqueue_prep(vsc, vq, &slot); 962 if (r == EAGAIN) 963 break; 964 if (r != 0) 965 panic("enqueue_prep for rx buffers"); 966 if (sc->sc_rx_mbufs[slot] == NULL) { 967 r = vioif_add_rx_mbuf(sc, slot); 968 if (r != 0) { 969 printf("%s: rx mbuf allocation failed, " 970 "error code %d\n", 971 device_xname(sc->sc_dev), r); 972 break; 973 } 974 } 975 r = virtio_enqueue_reserve(vsc, vq, slot, 976 sc->sc_rx_dmamaps[slot]->dm_nsegs + 1); 977 if (r != 0) { 978 vioif_free_rx_mbuf(sc, slot); 979 break; 980 } 981 bus_dmamap_sync(vsc->sc_dmat, sc->sc_rxhdr_dmamaps[slot], 982 0, sizeof(struct virtio_net_hdr), BUS_DMASYNC_PREREAD); 983 bus_dmamap_sync(vsc->sc_dmat, sc->sc_rx_dmamaps[slot], 984 0, MCLBYTES, BUS_DMASYNC_PREREAD); 985 virtio_enqueue(vsc, vq, slot, sc->sc_rxhdr_dmamaps[slot], false); 986 virtio_enqueue(vsc, vq, slot, sc->sc_rx_dmamaps[slot], false); 987 virtio_enqueue_commit(vsc, vq, slot, false); 988 ndone++; 989 } 990 if (ndone > 0) 991 virtio_enqueue_commit(vsc, vq, -1, true); 992 } 993 994 /* dequeue recieved packets */ 995 static int 996 vioif_rx_deq(struct vioif_softc *sc) 997 { 998 int r; 999 1000 KASSERT(sc->sc_stopping); 1001 1002 VIOIF_RX_LOCK(sc); 1003 r = vioif_rx_deq_locked(sc); 1004 VIOIF_RX_UNLOCK(sc); 1005 1006 return r; 1007 } 1008 1009 /* dequeue recieved packets */ 1010 static int 1011 vioif_rx_deq_locked(struct vioif_softc *sc) 1012 { 1013 struct virtio_softc *vsc = sc->sc_virtio; 1014 struct virtqueue *vq = &sc->sc_vq[VQ_RX]; 1015 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1016 struct mbuf *m; 1017 int r = 0; 1018 int slot, len; 1019 1020 KASSERT(VIOIF_RX_LOCKED(sc)); 1021 1022 while (virtio_dequeue(vsc, vq, &slot, &len) == 0) { 1023 len -= sizeof(struct virtio_net_hdr); 1024 r = 1; 1025 bus_dmamap_sync(vsc->sc_dmat, sc->sc_rxhdr_dmamaps[slot], 1026 0, sizeof(struct virtio_net_hdr), 1027 BUS_DMASYNC_POSTREAD); 1028 bus_dmamap_sync(vsc->sc_dmat, sc->sc_rx_dmamaps[slot], 1029 0, MCLBYTES, 1030 BUS_DMASYNC_POSTREAD); 1031 m = sc->sc_rx_mbufs[slot]; 1032 KASSERT(m != NULL); 1033 bus_dmamap_unload(vsc->sc_dmat, sc->sc_rx_dmamaps[slot]); 1034 sc->sc_rx_mbufs[slot] = 0; 1035 virtio_dequeue_commit(vsc, vq, slot); 1036 m_set_rcvif(m, ifp); 1037 m->m_len = m->m_pkthdr.len = len; 1038 ifp->if_ipackets++; 1039 bpf_mtap(ifp, m); 1040 1041 VIOIF_RX_UNLOCK(sc); 1042 if_percpuq_enqueue(ifp->if_percpuq, m); 1043 VIOIF_RX_LOCK(sc); 1044 1045 if (sc->sc_stopping) 1046 break; 1047 } 1048 1049 return r; 1050 } 1051 1052 /* rx interrupt; call _dequeue above and schedule a softint */ 1053 static int 1054 vioif_rx_vq_done(struct virtqueue *vq) 1055 { 1056 struct virtio_softc *vsc = vq->vq_owner; 1057 struct vioif_softc *sc = device_private(vsc->sc_child); 1058 int r = 0; 1059 1060 #ifdef VIOIF_SOFTINT_INTR 1061 KASSERT(!cpu_intr_p()); 1062 #endif 1063 1064 VIOIF_RX_LOCK(sc); 1065 1066 if (sc->sc_stopping) 1067 goto out; 1068 1069 r = vioif_rx_deq_locked(sc); 1070 if (r) 1071 #ifdef VIOIF_SOFTINT_INTR 1072 vioif_populate_rx_mbufs_locked(sc); 1073 #else 1074 softint_schedule(sc->sc_rx_softint); 1075 #endif 1076 1077 out: 1078 VIOIF_RX_UNLOCK(sc); 1079 return r; 1080 } 1081 1082 /* softint: enqueue recieve requests for new incoming packets */ 1083 static void 1084 vioif_rx_softint(void *arg) 1085 { 1086 struct vioif_softc *sc = arg; 1087 1088 vioif_populate_rx_mbufs(sc); 1089 } 1090 1091 /* free all the mbufs; called from if_stop(disable) */ 1092 static void 1093 vioif_rx_drain(struct vioif_softc *sc) 1094 { 1095 struct virtqueue *vq = &sc->sc_vq[VQ_RX]; 1096 int i; 1097 1098 for (i = 0; i < vq->vq_num; i++) { 1099 if (sc->sc_rx_mbufs[i] == NULL) 1100 continue; 1101 vioif_free_rx_mbuf(sc, i); 1102 } 1103 } 1104 1105 1106 /* 1107 * Transmition implementation 1108 */ 1109 /* actual transmission is done in if_start */ 1110 /* tx interrupt; dequeue and free mbufs */ 1111 /* 1112 * tx interrupt is actually disabled; this should be called upon 1113 * tx vq full and watchdog 1114 */ 1115 static int 1116 vioif_tx_vq_done(struct virtqueue *vq) 1117 { 1118 struct virtio_softc *vsc = vq->vq_owner; 1119 struct vioif_softc *sc = device_private(vsc->sc_child); 1120 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1121 int r = 0; 1122 1123 VIOIF_TX_LOCK(sc); 1124 1125 if (sc->sc_stopping) 1126 goto out; 1127 1128 r = vioif_tx_vq_done_locked(vq); 1129 1130 out: 1131 VIOIF_TX_UNLOCK(sc); 1132 if (r) 1133 vioif_start(ifp); 1134 return r; 1135 } 1136 1137 static int 1138 vioif_tx_vq_done_locked(struct virtqueue *vq) 1139 { 1140 struct virtio_softc *vsc = vq->vq_owner; 1141 struct vioif_softc *sc = device_private(vsc->sc_child); 1142 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1143 struct mbuf *m; 1144 int r = 0; 1145 int slot, len; 1146 1147 KASSERT(VIOIF_TX_LOCKED(sc)); 1148 1149 while (virtio_dequeue(vsc, vq, &slot, &len) == 0) { 1150 r++; 1151 bus_dmamap_sync(vsc->sc_dmat, sc->sc_txhdr_dmamaps[slot], 1152 0, sizeof(struct virtio_net_hdr), 1153 BUS_DMASYNC_POSTWRITE); 1154 bus_dmamap_sync(vsc->sc_dmat, sc->sc_tx_dmamaps[slot], 1155 0, sc->sc_tx_dmamaps[slot]->dm_mapsize, 1156 BUS_DMASYNC_POSTWRITE); 1157 m = sc->sc_tx_mbufs[slot]; 1158 bus_dmamap_unload(vsc->sc_dmat, sc->sc_tx_dmamaps[slot]); 1159 sc->sc_tx_mbufs[slot] = 0; 1160 virtio_dequeue_commit(vsc, vq, slot); 1161 ifp->if_opackets++; 1162 m_freem(m); 1163 } 1164 1165 if (r) 1166 ifp->if_flags &= ~IFF_OACTIVE; 1167 return r; 1168 } 1169 1170 /* free all the mbufs already put on vq; called from if_stop(disable) */ 1171 static void 1172 vioif_tx_drain(struct vioif_softc *sc) 1173 { 1174 struct virtio_softc *vsc = sc->sc_virtio; 1175 struct virtqueue *vq = &sc->sc_vq[VQ_TX]; 1176 int i; 1177 1178 KASSERT(sc->sc_stopping); 1179 1180 for (i = 0; i < vq->vq_num; i++) { 1181 if (sc->sc_tx_mbufs[i] == NULL) 1182 continue; 1183 bus_dmamap_unload(vsc->sc_dmat, sc->sc_tx_dmamaps[i]); 1184 m_freem(sc->sc_tx_mbufs[i]); 1185 sc->sc_tx_mbufs[i] = NULL; 1186 } 1187 } 1188 1189 /* 1190 * Control vq 1191 */ 1192 /* issue a VIRTIO_NET_CTRL_RX class command and wait for completion */ 1193 static int 1194 vioif_ctrl_rx(struct vioif_softc *sc, int cmd, bool onoff) 1195 { 1196 struct virtio_softc *vsc = sc->sc_virtio; 1197 struct virtqueue *vq = &sc->sc_vq[VQ_CTRL]; 1198 int r, slot; 1199 1200 if (vsc->sc_nvqs < 3) 1201 return ENOTSUP; 1202 1203 mutex_enter(&sc->sc_ctrl_wait_lock); 1204 while (sc->sc_ctrl_inuse != FREE) 1205 cv_wait(&sc->sc_ctrl_wait, &sc->sc_ctrl_wait_lock); 1206 sc->sc_ctrl_inuse = INUSE; 1207 mutex_exit(&sc->sc_ctrl_wait_lock); 1208 1209 sc->sc_ctrl_cmd->class = VIRTIO_NET_CTRL_RX; 1210 sc->sc_ctrl_cmd->command = cmd; 1211 sc->sc_ctrl_rx->onoff = onoff; 1212 1213 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_cmd_dmamap, 1214 0, sizeof(struct virtio_net_ctrl_cmd), 1215 BUS_DMASYNC_PREWRITE); 1216 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_rx_dmamap, 1217 0, sizeof(struct virtio_net_ctrl_rx), 1218 BUS_DMASYNC_PREWRITE); 1219 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_status_dmamap, 1220 0, sizeof(struct virtio_net_ctrl_status), 1221 BUS_DMASYNC_PREREAD); 1222 1223 r = virtio_enqueue_prep(vsc, vq, &slot); 1224 if (r != 0) 1225 panic("%s: control vq busy!?", device_xname(sc->sc_dev)); 1226 r = virtio_enqueue_reserve(vsc, vq, slot, 3); 1227 if (r != 0) 1228 panic("%s: control vq busy!?", device_xname(sc->sc_dev)); 1229 virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_cmd_dmamap, true); 1230 virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_rx_dmamap, true); 1231 virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_status_dmamap, false); 1232 virtio_enqueue_commit(vsc, vq, slot, true); 1233 1234 /* wait for done */ 1235 mutex_enter(&sc->sc_ctrl_wait_lock); 1236 while (sc->sc_ctrl_inuse != DONE) 1237 cv_wait(&sc->sc_ctrl_wait, &sc->sc_ctrl_wait_lock); 1238 mutex_exit(&sc->sc_ctrl_wait_lock); 1239 /* already dequeueued */ 1240 1241 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_cmd_dmamap, 0, 1242 sizeof(struct virtio_net_ctrl_cmd), 1243 BUS_DMASYNC_POSTWRITE); 1244 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_rx_dmamap, 0, 1245 sizeof(struct virtio_net_ctrl_rx), 1246 BUS_DMASYNC_POSTWRITE); 1247 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_status_dmamap, 0, 1248 sizeof(struct virtio_net_ctrl_status), 1249 BUS_DMASYNC_POSTREAD); 1250 1251 if (sc->sc_ctrl_status->ack == VIRTIO_NET_OK) 1252 r = 0; 1253 else { 1254 printf("%s: failed setting rx mode\n", 1255 device_xname(sc->sc_dev)); 1256 r = EIO; 1257 } 1258 1259 mutex_enter(&sc->sc_ctrl_wait_lock); 1260 sc->sc_ctrl_inuse = FREE; 1261 cv_signal(&sc->sc_ctrl_wait); 1262 mutex_exit(&sc->sc_ctrl_wait_lock); 1263 1264 return r; 1265 } 1266 1267 static int 1268 vioif_set_promisc(struct vioif_softc *sc, bool onoff) 1269 { 1270 int r; 1271 1272 r = vioif_ctrl_rx(sc, VIRTIO_NET_CTRL_RX_PROMISC, onoff); 1273 1274 return r; 1275 } 1276 1277 static int 1278 vioif_set_allmulti(struct vioif_softc *sc, bool onoff) 1279 { 1280 int r; 1281 1282 r = vioif_ctrl_rx(sc, VIRTIO_NET_CTRL_RX_ALLMULTI, onoff); 1283 1284 return r; 1285 } 1286 1287 /* issue VIRTIO_NET_CTRL_MAC_TABLE_SET command and wait for completion */ 1288 static int 1289 vioif_set_rx_filter(struct vioif_softc *sc) 1290 { 1291 /* filter already set in sc_ctrl_mac_tbl */ 1292 struct virtio_softc *vsc = sc->sc_virtio; 1293 struct virtqueue *vq = &sc->sc_vq[VQ_CTRL]; 1294 int r, slot; 1295 1296 if (vsc->sc_nvqs < 3) 1297 return ENOTSUP; 1298 1299 mutex_enter(&sc->sc_ctrl_wait_lock); 1300 while (sc->sc_ctrl_inuse != FREE) 1301 cv_wait(&sc->sc_ctrl_wait, &sc->sc_ctrl_wait_lock); 1302 sc->sc_ctrl_inuse = INUSE; 1303 mutex_exit(&sc->sc_ctrl_wait_lock); 1304 1305 sc->sc_ctrl_cmd->class = VIRTIO_NET_CTRL_MAC; 1306 sc->sc_ctrl_cmd->command = VIRTIO_NET_CTRL_MAC_TABLE_SET; 1307 1308 r = bus_dmamap_load(vsc->sc_dmat, sc->sc_ctrl_tbl_uc_dmamap, 1309 sc->sc_ctrl_mac_tbl_uc, 1310 (sizeof(struct virtio_net_ctrl_mac_tbl) 1311 + ETHER_ADDR_LEN * sc->sc_ctrl_mac_tbl_uc->nentries), 1312 NULL, BUS_DMA_WRITE|BUS_DMA_NOWAIT); 1313 if (r) { 1314 printf("%s: control command dmamap load failed, " 1315 "error code %d\n", device_xname(sc->sc_dev), r); 1316 goto out; 1317 } 1318 r = bus_dmamap_load(vsc->sc_dmat, sc->sc_ctrl_tbl_mc_dmamap, 1319 sc->sc_ctrl_mac_tbl_mc, 1320 (sizeof(struct virtio_net_ctrl_mac_tbl) 1321 + ETHER_ADDR_LEN * sc->sc_ctrl_mac_tbl_mc->nentries), 1322 NULL, BUS_DMA_WRITE|BUS_DMA_NOWAIT); 1323 if (r) { 1324 printf("%s: control command dmamap load failed, " 1325 "error code %d\n", device_xname(sc->sc_dev), r); 1326 bus_dmamap_unload(vsc->sc_dmat, sc->sc_ctrl_tbl_uc_dmamap); 1327 goto out; 1328 } 1329 1330 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_cmd_dmamap, 1331 0, sizeof(struct virtio_net_ctrl_cmd), 1332 BUS_DMASYNC_PREWRITE); 1333 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_tbl_uc_dmamap, 0, 1334 (sizeof(struct virtio_net_ctrl_mac_tbl) 1335 + ETHER_ADDR_LEN * sc->sc_ctrl_mac_tbl_uc->nentries), 1336 BUS_DMASYNC_PREWRITE); 1337 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_tbl_mc_dmamap, 0, 1338 (sizeof(struct virtio_net_ctrl_mac_tbl) 1339 + ETHER_ADDR_LEN * sc->sc_ctrl_mac_tbl_mc->nentries), 1340 BUS_DMASYNC_PREWRITE); 1341 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_status_dmamap, 1342 0, sizeof(struct virtio_net_ctrl_status), 1343 BUS_DMASYNC_PREREAD); 1344 1345 r = virtio_enqueue_prep(vsc, vq, &slot); 1346 if (r != 0) 1347 panic("%s: control vq busy!?", device_xname(sc->sc_dev)); 1348 r = virtio_enqueue_reserve(vsc, vq, slot, 4); 1349 if (r != 0) 1350 panic("%s: control vq busy!?", device_xname(sc->sc_dev)); 1351 virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_cmd_dmamap, true); 1352 virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_tbl_uc_dmamap, true); 1353 virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_tbl_mc_dmamap, true); 1354 virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_status_dmamap, false); 1355 virtio_enqueue_commit(vsc, vq, slot, true); 1356 1357 /* wait for done */ 1358 mutex_enter(&sc->sc_ctrl_wait_lock); 1359 while (sc->sc_ctrl_inuse != DONE) 1360 cv_wait(&sc->sc_ctrl_wait, &sc->sc_ctrl_wait_lock); 1361 mutex_exit(&sc->sc_ctrl_wait_lock); 1362 /* already dequeueued */ 1363 1364 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_cmd_dmamap, 0, 1365 sizeof(struct virtio_net_ctrl_cmd), 1366 BUS_DMASYNC_POSTWRITE); 1367 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_tbl_uc_dmamap, 0, 1368 (sizeof(struct virtio_net_ctrl_mac_tbl) 1369 + ETHER_ADDR_LEN * sc->sc_ctrl_mac_tbl_uc->nentries), 1370 BUS_DMASYNC_POSTWRITE); 1371 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_tbl_mc_dmamap, 0, 1372 (sizeof(struct virtio_net_ctrl_mac_tbl) 1373 + ETHER_ADDR_LEN * sc->sc_ctrl_mac_tbl_mc->nentries), 1374 BUS_DMASYNC_POSTWRITE); 1375 bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_status_dmamap, 0, 1376 sizeof(struct virtio_net_ctrl_status), 1377 BUS_DMASYNC_POSTREAD); 1378 bus_dmamap_unload(vsc->sc_dmat, sc->sc_ctrl_tbl_uc_dmamap); 1379 bus_dmamap_unload(vsc->sc_dmat, sc->sc_ctrl_tbl_mc_dmamap); 1380 1381 if (sc->sc_ctrl_status->ack == VIRTIO_NET_OK) 1382 r = 0; 1383 else { 1384 printf("%s: failed setting rx filter\n", 1385 device_xname(sc->sc_dev)); 1386 r = EIO; 1387 } 1388 1389 out: 1390 mutex_enter(&sc->sc_ctrl_wait_lock); 1391 sc->sc_ctrl_inuse = FREE; 1392 cv_signal(&sc->sc_ctrl_wait); 1393 mutex_exit(&sc->sc_ctrl_wait_lock); 1394 1395 return r; 1396 } 1397 1398 /* ctrl vq interrupt; wake up the command issuer */ 1399 static int 1400 vioif_ctrl_vq_done(struct virtqueue *vq) 1401 { 1402 struct virtio_softc *vsc = vq->vq_owner; 1403 struct vioif_softc *sc = device_private(vsc->sc_child); 1404 int r, slot; 1405 1406 r = virtio_dequeue(vsc, vq, &slot, NULL); 1407 if (r == ENOENT) 1408 return 0; 1409 virtio_dequeue_commit(vsc, vq, slot); 1410 1411 mutex_enter(&sc->sc_ctrl_wait_lock); 1412 sc->sc_ctrl_inuse = DONE; 1413 cv_signal(&sc->sc_ctrl_wait); 1414 mutex_exit(&sc->sc_ctrl_wait_lock); 1415 1416 return 1; 1417 } 1418 1419 /* 1420 * If IFF_PROMISC requested, set promiscuous 1421 * If multicast filter small enough (<=MAXENTRIES) set rx filter 1422 * If large multicast filter exist use ALLMULTI 1423 */ 1424 /* 1425 * If setting rx filter fails fall back to ALLMULTI 1426 * If ALLMULTI fails fall back to PROMISC 1427 */ 1428 static int 1429 vioif_rx_filter(struct vioif_softc *sc) 1430 { 1431 struct virtio_softc *vsc = sc->sc_virtio; 1432 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1433 struct ether_multi *enm; 1434 struct ether_multistep step; 1435 int nentries; 1436 int promisc = 0, allmulti = 0, rxfilter = 0; 1437 int r; 1438 1439 if (vsc->sc_nvqs < 3) { /* no ctrl vq; always promisc */ 1440 ifp->if_flags |= IFF_PROMISC; 1441 return 0; 1442 } 1443 1444 if (ifp->if_flags & IFF_PROMISC) { 1445 promisc = 1; 1446 goto set; 1447 } 1448 1449 nentries = -1; 1450 ETHER_FIRST_MULTI(step, &sc->sc_ethercom, enm); 1451 while (nentries++, enm != NULL) { 1452 if (nentries >= VIRTIO_NET_CTRL_MAC_MAXENTRIES) { 1453 allmulti = 1; 1454 goto set; 1455 } 1456 if (memcmp(enm->enm_addrlo, enm->enm_addrhi, 1457 ETHER_ADDR_LEN)) { 1458 allmulti = 1; 1459 goto set; 1460 } 1461 memcpy(sc->sc_ctrl_mac_tbl_mc->macs[nentries], 1462 enm->enm_addrlo, ETHER_ADDR_LEN); 1463 ETHER_NEXT_MULTI(step, enm); 1464 } 1465 rxfilter = 1; 1466 1467 set: 1468 if (rxfilter) { 1469 sc->sc_ctrl_mac_tbl_uc->nentries = 0; 1470 sc->sc_ctrl_mac_tbl_mc->nentries = nentries; 1471 r = vioif_set_rx_filter(sc); 1472 if (r != 0) { 1473 rxfilter = 0; 1474 allmulti = 1; /* fallback */ 1475 } 1476 } else { 1477 /* remove rx filter */ 1478 sc->sc_ctrl_mac_tbl_uc->nentries = 0; 1479 sc->sc_ctrl_mac_tbl_mc->nentries = 0; 1480 r = vioif_set_rx_filter(sc); 1481 /* what to do on failure? */ 1482 } 1483 if (allmulti) { 1484 r = vioif_set_allmulti(sc, true); 1485 if (r != 0) { 1486 allmulti = 0; 1487 promisc = 1; /* fallback */ 1488 } 1489 } else { 1490 r = vioif_set_allmulti(sc, false); 1491 /* what to do on failure? */ 1492 } 1493 if (promisc) { 1494 r = vioif_set_promisc(sc, true); 1495 } else { 1496 r = vioif_set_promisc(sc, false); 1497 } 1498 1499 return r; 1500 } 1501 1502 /* change link status */ 1503 static int 1504 vioif_updown(struct vioif_softc *sc, bool isup) 1505 { 1506 struct virtio_softc *vsc = sc->sc_virtio; 1507 1508 if (!(vsc->sc_features & VIRTIO_NET_F_STATUS)) 1509 return ENODEV; 1510 virtio_write_device_config_1(vsc, 1511 VIRTIO_NET_CONFIG_STATUS, 1512 isup?VIRTIO_NET_S_LINK_UP:0); 1513 return 0; 1514 } 1515 1516 MODULE(MODULE_CLASS_DRIVER, if_vioif, "virtio"); 1517 1518 #ifdef _MODULE 1519 #include "ioconf.c" 1520 #endif 1521 1522 static int 1523 if_vioif_modcmd(modcmd_t cmd, void *opaque) 1524 { 1525 int error = 0; 1526 1527 #ifdef _MODULE 1528 switch (cmd) { 1529 case MODULE_CMD_INIT: 1530 error = config_init_component(cfdriver_ioconf_if_vioif, 1531 cfattach_ioconf_if_vioif, cfdata_ioconf_if_vioif); 1532 break; 1533 case MODULE_CMD_FINI: 1534 error = config_fini_component(cfdriver_ioconf_if_vioif, 1535 cfattach_ioconf_if_vioif, cfdata_ioconf_if_vioif); 1536 break; 1537 default: 1538 error = ENOTTY; 1539 break; 1540 } 1541 #endif 1542 1543 return error; 1544 } 1545
Indexes created Sun Oct 19 02:09:48 GMT 2025