| 1 | /* $NetBSD: if_vioif.c,v 1.26 2016/09/27 03:33:32 pgoyette 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 1.26 2016/09/27 03:33:32 pgoyette 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 | virtio_enqueue_abort(vsc, vq, slot); |
| 827 | bus_dmamap_unload(vsc->sc_dmat, |
| 828 | sc->sc_tx_dmamaps[slot]); |
| 829 | ifp->if_flags |= IFF_OACTIVE; |
| 830 | vioif_tx_vq_done_locked(vq); |
| 831 | if (retry++ == 0) |
| 832 | goto retry; |
| 833 | else |
| 834 | break; |
| 835 | } |
| 836 | |
| 837 | sc->sc_tx_mbufs[slot] = m; |
| 838 | |
| 839 | memset(&sc->sc_tx_hdrs[slot], 0, sizeof(struct virtio_net_hdr)); |
| 840 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_tx_dmamaps[slot], |
| 841 | 0, sc->sc_tx_dmamaps[slot]->dm_mapsize, |
| 842 | BUS_DMASYNC_PREWRITE); |
| 843 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_txhdr_dmamaps[slot], |
| 844 | 0, sc->sc_txhdr_dmamaps[slot]->dm_mapsize, |
| 845 | BUS_DMASYNC_PREWRITE); |
| 846 | virtio_enqueue(vsc, vq, slot, sc->sc_txhdr_dmamaps[slot], true); |
| 847 | virtio_enqueue(vsc, vq, slot, sc->sc_tx_dmamaps[slot], true); |
| 848 | virtio_enqueue_commit(vsc, vq, slot, false); |
| 849 | queued++; |
| 850 | bpf_mtap(ifp, m); |
| 851 | } |
| 852 | |
| 853 | if (m != NULL) { |
| 854 | ifp->if_flags |= IFF_OACTIVE; |
| 855 | m_freem(m); |
| 856 | } |
| 857 | |
| 858 | if (queued > 0) { |
| 859 | virtio_enqueue_commit(vsc, vq, -1, true); |
| 860 | ifp->if_timer = 5; |
| 861 | } |
| 862 | |
| 863 | out: |
| 864 | VIOIF_TX_UNLOCK(sc); |
| 865 | } |
| 866 | |
| 867 | static int |
| 868 | vioif_ioctl(struct ifnet *ifp, u_long cmd, void *data) |
| 869 | { |
| 870 | int s, r; |
| 871 | |
| 872 | s = splnet(); |
| 873 | |
| 874 | r = ether_ioctl(ifp, cmd, data); |
| 875 | if ((r == 0 && cmd == SIOCSIFFLAGS) || |
| 876 | (r == ENETRESET && (cmd == SIOCADDMULTI || cmd == SIOCDELMULTI))) { |
| 877 | if (ifp->if_flags & IFF_RUNNING) |
| 878 | r = vioif_rx_filter(ifp->if_softc); |
| 879 | else |
| 880 | r = 0; |
| 881 | } |
| 882 | |
| 883 | splx(s); |
| 884 | |
| 885 | return r; |
| 886 | } |
| 887 | |
| 888 | void |
| 889 | vioif_watchdog(struct ifnet *ifp) |
| 890 | { |
| 891 | struct vioif_softc *sc = ifp->if_softc; |
| 892 | |
| 893 | if (ifp->if_flags & IFF_RUNNING) |
| 894 | vioif_tx_vq_done(&sc->sc_vq[VQ_TX]); |
| 895 | } |
| 896 | |
| 897 | |
| 898 | /* |
| 899 | * Recieve implementation |
| 900 | */ |
| 901 | /* allocate and initialize a mbuf for recieve */ |
| 902 | static int |
| 903 | vioif_add_rx_mbuf(struct vioif_softc *sc, int i) |
| 904 | { |
| 905 | struct mbuf *m; |
| 906 | int r; |
| 907 | |
| 908 | MGETHDR(m, M_DONTWAIT, MT_DATA); |
| 909 | if (m == NULL) |
| 910 | return ENOBUFS; |
| 911 | MCLGET(m, M_DONTWAIT); |
| 912 | if ((m->m_flags & M_EXT) == 0) { |
| 913 | m_freem(m); |
| 914 | return ENOBUFS; |
| 915 | } |
| 916 | sc->sc_rx_mbufs[i] = m; |
| 917 | m->m_len = m->m_pkthdr.len = m->m_ext.ext_size; |
| 918 | r = bus_dmamap_load_mbuf(sc->sc_virtio->sc_dmat, |
| 919 | sc->sc_rx_dmamaps[i], |
| 920 | m, BUS_DMA_READ|BUS_DMA_NOWAIT); |
| 921 | if (r) { |
| 922 | m_freem(m); |
| 923 | sc->sc_rx_mbufs[i] = 0; |
| 924 | return r; |
| 925 | } |
| 926 | |
| 927 | return 0; |
| 928 | } |
| 929 | |
| 930 | /* free a mbuf for recieve */ |
| 931 | static void |
| 932 | vioif_free_rx_mbuf(struct vioif_softc *sc, int i) |
| 933 | { |
| 934 | bus_dmamap_unload(sc->sc_virtio->sc_dmat, sc->sc_rx_dmamaps[i]); |
| 935 | m_freem(sc->sc_rx_mbufs[i]); |
| 936 | sc->sc_rx_mbufs[i] = NULL; |
| 937 | } |
| 938 | |
| 939 | /* add mbufs for all the empty recieve slots */ |
| 940 | static void |
| 941 | vioif_populate_rx_mbufs(struct vioif_softc *sc) |
| 942 | { |
| 943 | VIOIF_RX_LOCK(sc); |
| 944 | vioif_populate_rx_mbufs_locked(sc); |
| 945 | VIOIF_RX_UNLOCK(sc); |
| 946 | } |
| 947 | |
| 948 | static void |
| 949 | vioif_populate_rx_mbufs_locked(struct vioif_softc *sc) |
| 950 | { |
| 951 | struct virtio_softc *vsc = sc->sc_virtio; |
| 952 | int i, r, ndone = 0; |
| 953 | struct virtqueue *vq = &sc->sc_vq[VQ_RX]; |
| 954 | |
| 955 | KASSERT(VIOIF_RX_LOCKED(sc)); |
| 956 | |
| 957 | if (sc->sc_stopping) |
| 958 | return; |
| 959 | |
| 960 | for (i = 0; i < vq->vq_num; i++) { |
| 961 | int slot; |
| 962 | r = virtio_enqueue_prep(vsc, vq, &slot); |
| 963 | if (r == EAGAIN) |
| 964 | break; |
| 965 | if (r != 0) |
| 966 | panic("enqueue_prep for rx buffers" ); |
| 967 | if (sc->sc_rx_mbufs[slot] == NULL) { |
| 968 | r = vioif_add_rx_mbuf(sc, slot); |
| 969 | if (r != 0) { |
| 970 | printf("%s: rx mbuf allocation failed, " |
| 971 | "error code %d\n" , |
| 972 | device_xname(sc->sc_dev), r); |
| 973 | break; |
| 974 | } |
| 975 | } |
| 976 | r = virtio_enqueue_reserve(vsc, vq, slot, |
| 977 | sc->sc_rx_dmamaps[slot]->dm_nsegs + 1); |
| 978 | if (r != 0) { |
| 979 | vioif_free_rx_mbuf(sc, slot); |
| 980 | break; |
| 981 | } |
| 982 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_rxhdr_dmamaps[slot], |
| 983 | 0, sizeof(struct virtio_net_hdr), BUS_DMASYNC_PREREAD); |
| 984 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_rx_dmamaps[slot], |
| 985 | 0, MCLBYTES, BUS_DMASYNC_PREREAD); |
| 986 | virtio_enqueue(vsc, vq, slot, sc->sc_rxhdr_dmamaps[slot], false); |
| 987 | virtio_enqueue(vsc, vq, slot, sc->sc_rx_dmamaps[slot], false); |
| 988 | virtio_enqueue_commit(vsc, vq, slot, false); |
| 989 | ndone++; |
| 990 | } |
| 991 | if (ndone > 0) |
| 992 | virtio_enqueue_commit(vsc, vq, -1, true); |
| 993 | } |
| 994 | |
| 995 | /* dequeue recieved packets */ |
| 996 | static int |
| 997 | vioif_rx_deq(struct vioif_softc *sc) |
| 998 | { |
| 999 | int r; |
| 1000 | |
| 1001 | KASSERT(sc->sc_stopping); |
| 1002 | |
| 1003 | VIOIF_RX_LOCK(sc); |
| 1004 | r = vioif_rx_deq_locked(sc); |
| 1005 | VIOIF_RX_UNLOCK(sc); |
| 1006 | |
| 1007 | return r; |
| 1008 | } |
| 1009 | |
| 1010 | /* dequeue recieved packets */ |
| 1011 | static int |
| 1012 | vioif_rx_deq_locked(struct vioif_softc *sc) |
| 1013 | { |
| 1014 | struct virtio_softc *vsc = sc->sc_virtio; |
| 1015 | struct virtqueue *vq = &sc->sc_vq[VQ_RX]; |
| 1016 | struct ifnet *ifp = &sc->sc_ethercom.ec_if; |
| 1017 | struct mbuf *m; |
| 1018 | int r = 0; |
| 1019 | int slot, len; |
| 1020 | |
| 1021 | KASSERT(VIOIF_RX_LOCKED(sc)); |
| 1022 | |
| 1023 | while (virtio_dequeue(vsc, vq, &slot, &len) == 0) { |
| 1024 | len -= sizeof(struct virtio_net_hdr); |
| 1025 | r = 1; |
| 1026 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_rxhdr_dmamaps[slot], |
| 1027 | 0, sizeof(struct virtio_net_hdr), |
| 1028 | BUS_DMASYNC_POSTREAD); |
| 1029 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_rx_dmamaps[slot], |
| 1030 | 0, MCLBYTES, |
| 1031 | BUS_DMASYNC_POSTREAD); |
| 1032 | m = sc->sc_rx_mbufs[slot]; |
| 1033 | KASSERT(m != NULL); |
| 1034 | bus_dmamap_unload(vsc->sc_dmat, sc->sc_rx_dmamaps[slot]); |
| 1035 | sc->sc_rx_mbufs[slot] = 0; |
| 1036 | virtio_dequeue_commit(vsc, vq, slot); |
| 1037 | m_set_rcvif(m, ifp); |
| 1038 | m->m_len = m->m_pkthdr.len = len; |
| 1039 | ifp->if_ipackets++; |
| 1040 | bpf_mtap(ifp, m); |
| 1041 | |
| 1042 | VIOIF_RX_UNLOCK(sc); |
| 1043 | if_percpuq_enqueue(ifp->if_percpuq, m); |
| 1044 | VIOIF_RX_LOCK(sc); |
| 1045 | |
| 1046 | if (sc->sc_stopping) |
| 1047 | break; |
| 1048 | } |
| 1049 | |
| 1050 | return r; |
| 1051 | } |
| 1052 | |
| 1053 | /* rx interrupt; call _dequeue above and schedule a softint */ |
| 1054 | static int |
| 1055 | vioif_rx_vq_done(struct virtqueue *vq) |
| 1056 | { |
| 1057 | struct virtio_softc *vsc = vq->vq_owner; |
| 1058 | struct vioif_softc *sc = device_private(vsc->sc_child); |
| 1059 | int r = 0; |
| 1060 | |
| 1061 | #ifdef VIOIF_SOFTINT_INTR |
| 1062 | KASSERT(!cpu_intr_p()); |
| 1063 | #endif |
| 1064 | |
| 1065 | VIOIF_RX_LOCK(sc); |
| 1066 | |
| 1067 | if (sc->sc_stopping) |
| 1068 | goto out; |
| 1069 | |
| 1070 | r = vioif_rx_deq_locked(sc); |
| 1071 | if (r) |
| 1072 | #ifdef VIOIF_SOFTINT_INTR |
| 1073 | vioif_populate_rx_mbufs_locked(sc); |
| 1074 | #else |
| 1075 | softint_schedule(sc->sc_rx_softint); |
| 1076 | #endif |
| 1077 | |
| 1078 | out: |
| 1079 | VIOIF_RX_UNLOCK(sc); |
| 1080 | return r; |
| 1081 | } |
| 1082 | |
| 1083 | /* softint: enqueue recieve requests for new incoming packets */ |
| 1084 | static void |
| 1085 | vioif_rx_softint(void *arg) |
| 1086 | { |
| 1087 | struct vioif_softc *sc = arg; |
| 1088 | |
| 1089 | vioif_populate_rx_mbufs(sc); |
| 1090 | } |
| 1091 | |
| 1092 | /* free all the mbufs; called from if_stop(disable) */ |
| 1093 | static void |
| 1094 | vioif_rx_drain(struct vioif_softc *sc) |
| 1095 | { |
| 1096 | struct virtqueue *vq = &sc->sc_vq[VQ_RX]; |
| 1097 | int i; |
| 1098 | |
| 1099 | for (i = 0; i < vq->vq_num; i++) { |
| 1100 | if (sc->sc_rx_mbufs[i] == NULL) |
| 1101 | continue; |
| 1102 | vioif_free_rx_mbuf(sc, i); |
| 1103 | } |
| 1104 | } |
| 1105 | |
| 1106 | |
| 1107 | /* |
| 1108 | * Transmition implementation |
| 1109 | */ |
| 1110 | /* actual transmission is done in if_start */ |
| 1111 | /* tx interrupt; dequeue and free mbufs */ |
| 1112 | /* |
| 1113 | * tx interrupt is actually disabled; this should be called upon |
| 1114 | * tx vq full and watchdog |
| 1115 | */ |
| 1116 | static int |
| 1117 | vioif_tx_vq_done(struct virtqueue *vq) |
| 1118 | { |
| 1119 | struct virtio_softc *vsc = vq->vq_owner; |
| 1120 | struct vioif_softc *sc = device_private(vsc->sc_child); |
| 1121 | struct ifnet *ifp = &sc->sc_ethercom.ec_if; |
| 1122 | int r = 0; |
| 1123 | |
| 1124 | VIOIF_TX_LOCK(sc); |
| 1125 | |
| 1126 | if (sc->sc_stopping) |
| 1127 | goto out; |
| 1128 | |
| 1129 | r = vioif_tx_vq_done_locked(vq); |
| 1130 | |
| 1131 | out: |
| 1132 | VIOIF_TX_UNLOCK(sc); |
| 1133 | if (r) |
| 1134 | vioif_start(ifp); |
| 1135 | return r; |
| 1136 | } |
| 1137 | |
| 1138 | static int |
| 1139 | vioif_tx_vq_done_locked(struct virtqueue *vq) |
| 1140 | { |
| 1141 | struct virtio_softc *vsc = vq->vq_owner; |
| 1142 | struct vioif_softc *sc = device_private(vsc->sc_child); |
| 1143 | struct ifnet *ifp = &sc->sc_ethercom.ec_if; |
| 1144 | struct mbuf *m; |
| 1145 | int r = 0; |
| 1146 | int slot, len; |
| 1147 | |
| 1148 | KASSERT(VIOIF_TX_LOCKED(sc)); |
| 1149 | |
| 1150 | while (virtio_dequeue(vsc, vq, &slot, &len) == 0) { |
| 1151 | r++; |
| 1152 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_txhdr_dmamaps[slot], |
| 1153 | 0, sizeof(struct virtio_net_hdr), |
| 1154 | BUS_DMASYNC_POSTWRITE); |
| 1155 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_tx_dmamaps[slot], |
| 1156 | 0, sc->sc_tx_dmamaps[slot]->dm_mapsize, |
| 1157 | BUS_DMASYNC_POSTWRITE); |
| 1158 | m = sc->sc_tx_mbufs[slot]; |
| 1159 | bus_dmamap_unload(vsc->sc_dmat, sc->sc_tx_dmamaps[slot]); |
| 1160 | sc->sc_tx_mbufs[slot] = 0; |
| 1161 | virtio_dequeue_commit(vsc, vq, slot); |
| 1162 | ifp->if_opackets++; |
| 1163 | m_freem(m); |
| 1164 | } |
| 1165 | |
| 1166 | if (r) |
| 1167 | ifp->if_flags &= ~IFF_OACTIVE; |
| 1168 | return r; |
| 1169 | } |
| 1170 | |
| 1171 | /* free all the mbufs already put on vq; called from if_stop(disable) */ |
| 1172 | static void |
| 1173 | vioif_tx_drain(struct vioif_softc *sc) |
| 1174 | { |
| 1175 | struct virtio_softc *vsc = sc->sc_virtio; |
| 1176 | struct virtqueue *vq = &sc->sc_vq[VQ_TX]; |
| 1177 | int i; |
| 1178 | |
| 1179 | KASSERT(sc->sc_stopping); |
| 1180 | |
| 1181 | for (i = 0; i < vq->vq_num; i++) { |
| 1182 | if (sc->sc_tx_mbufs[i] == NULL) |
| 1183 | continue; |
| 1184 | bus_dmamap_unload(vsc->sc_dmat, sc->sc_tx_dmamaps[i]); |
| 1185 | m_freem(sc->sc_tx_mbufs[i]); |
| 1186 | sc->sc_tx_mbufs[i] = NULL; |
| 1187 | } |
| 1188 | } |
| 1189 | |
| 1190 | /* |
| 1191 | * Control vq |
| 1192 | */ |
| 1193 | /* issue a VIRTIO_NET_CTRL_RX class command and wait for completion */ |
| 1194 | static int |
| 1195 | vioif_ctrl_rx(struct vioif_softc *sc, int cmd, bool onoff) |
| 1196 | { |
| 1197 | struct virtio_softc *vsc = sc->sc_virtio; |
| 1198 | struct virtqueue *vq = &sc->sc_vq[VQ_CTRL]; |
| 1199 | int r, slot; |
| 1200 | |
| 1201 | if (vsc->sc_nvqs < 3) |
| 1202 | return ENOTSUP; |
| 1203 | |
| 1204 | mutex_enter(&sc->sc_ctrl_wait_lock); |
| 1205 | while (sc->sc_ctrl_inuse != FREE) |
| 1206 | cv_wait(&sc->sc_ctrl_wait, &sc->sc_ctrl_wait_lock); |
| 1207 | sc->sc_ctrl_inuse = INUSE; |
| 1208 | mutex_exit(&sc->sc_ctrl_wait_lock); |
| 1209 | |
| 1210 | sc->sc_ctrl_cmd->class = VIRTIO_NET_CTRL_RX; |
| 1211 | sc->sc_ctrl_cmd->command = cmd; |
| 1212 | sc->sc_ctrl_rx->onoff = onoff; |
| 1213 | |
| 1214 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_cmd_dmamap, |
| 1215 | 0, sizeof(struct virtio_net_ctrl_cmd), |
| 1216 | BUS_DMASYNC_PREWRITE); |
| 1217 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_rx_dmamap, |
| 1218 | 0, sizeof(struct virtio_net_ctrl_rx), |
| 1219 | BUS_DMASYNC_PREWRITE); |
| 1220 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_status_dmamap, |
| 1221 | 0, sizeof(struct virtio_net_ctrl_status), |
| 1222 | BUS_DMASYNC_PREREAD); |
| 1223 | |
| 1224 | r = virtio_enqueue_prep(vsc, vq, &slot); |
| 1225 | if (r != 0) |
| 1226 | panic("%s: control vq busy!?" , device_xname(sc->sc_dev)); |
| 1227 | r = virtio_enqueue_reserve(vsc, vq, slot, 3); |
| 1228 | if (r != 0) |
| 1229 | panic("%s: control vq busy!?" , device_xname(sc->sc_dev)); |
| 1230 | virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_cmd_dmamap, true); |
| 1231 | virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_rx_dmamap, true); |
| 1232 | virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_status_dmamap, false); |
| 1233 | virtio_enqueue_commit(vsc, vq, slot, true); |
| 1234 | |
| 1235 | /* wait for done */ |
| 1236 | mutex_enter(&sc->sc_ctrl_wait_lock); |
| 1237 | while (sc->sc_ctrl_inuse != DONE) |
| 1238 | cv_wait(&sc->sc_ctrl_wait, &sc->sc_ctrl_wait_lock); |
| 1239 | mutex_exit(&sc->sc_ctrl_wait_lock); |
| 1240 | /* already dequeueued */ |
| 1241 | |
| 1242 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_cmd_dmamap, 0, |
| 1243 | sizeof(struct virtio_net_ctrl_cmd), |
| 1244 | BUS_DMASYNC_POSTWRITE); |
| 1245 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_rx_dmamap, 0, |
| 1246 | sizeof(struct virtio_net_ctrl_rx), |
| 1247 | BUS_DMASYNC_POSTWRITE); |
| 1248 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_status_dmamap, 0, |
| 1249 | sizeof(struct virtio_net_ctrl_status), |
| 1250 | BUS_DMASYNC_POSTREAD); |
| 1251 | |
| 1252 | if (sc->sc_ctrl_status->ack == VIRTIO_NET_OK) |
| 1253 | r = 0; |
| 1254 | else { |
| 1255 | printf("%s: failed setting rx mode\n" , |
| 1256 | device_xname(sc->sc_dev)); |
| 1257 | r = EIO; |
| 1258 | } |
| 1259 | |
| 1260 | mutex_enter(&sc->sc_ctrl_wait_lock); |
| 1261 | sc->sc_ctrl_inuse = FREE; |
| 1262 | cv_signal(&sc->sc_ctrl_wait); |
| 1263 | mutex_exit(&sc->sc_ctrl_wait_lock); |
| 1264 | |
| 1265 | return r; |
| 1266 | } |
| 1267 | |
| 1268 | static int |
| 1269 | vioif_set_promisc(struct vioif_softc *sc, bool onoff) |
| 1270 | { |
| 1271 | int r; |
| 1272 | |
| 1273 | r = vioif_ctrl_rx(sc, VIRTIO_NET_CTRL_RX_PROMISC, onoff); |
| 1274 | |
| 1275 | return r; |
| 1276 | } |
| 1277 | |
| 1278 | static int |
| 1279 | vioif_set_allmulti(struct vioif_softc *sc, bool onoff) |
| 1280 | { |
| 1281 | int r; |
| 1282 | |
| 1283 | r = vioif_ctrl_rx(sc, VIRTIO_NET_CTRL_RX_ALLMULTI, onoff); |
| 1284 | |
| 1285 | return r; |
| 1286 | } |
| 1287 | |
| 1288 | /* issue VIRTIO_NET_CTRL_MAC_TABLE_SET command and wait for completion */ |
| 1289 | static int |
| 1290 | vioif_set_rx_filter(struct vioif_softc *sc) |
| 1291 | { |
| 1292 | /* filter already set in sc_ctrl_mac_tbl */ |
| 1293 | struct virtio_softc *vsc = sc->sc_virtio; |
| 1294 | struct virtqueue *vq = &sc->sc_vq[VQ_CTRL]; |
| 1295 | int r, slot; |
| 1296 | |
| 1297 | if (vsc->sc_nvqs < 3) |
| 1298 | return ENOTSUP; |
| 1299 | |
| 1300 | mutex_enter(&sc->sc_ctrl_wait_lock); |
| 1301 | while (sc->sc_ctrl_inuse != FREE) |
| 1302 | cv_wait(&sc->sc_ctrl_wait, &sc->sc_ctrl_wait_lock); |
| 1303 | sc->sc_ctrl_inuse = INUSE; |
| 1304 | mutex_exit(&sc->sc_ctrl_wait_lock); |
| 1305 | |
| 1306 | sc->sc_ctrl_cmd->class = VIRTIO_NET_CTRL_MAC; |
| 1307 | sc->sc_ctrl_cmd->command = VIRTIO_NET_CTRL_MAC_TABLE_SET; |
| 1308 | |
| 1309 | r = bus_dmamap_load(vsc->sc_dmat, sc->sc_ctrl_tbl_uc_dmamap, |
| 1310 | sc->sc_ctrl_mac_tbl_uc, |
| 1311 | (sizeof(struct virtio_net_ctrl_mac_tbl) |
| 1312 | + ETHER_ADDR_LEN * sc->sc_ctrl_mac_tbl_uc->nentries), |
| 1313 | NULL, BUS_DMA_WRITE|BUS_DMA_NOWAIT); |
| 1314 | if (r) { |
| 1315 | printf("%s: control command dmamap load failed, " |
| 1316 | "error code %d\n" , device_xname(sc->sc_dev), r); |
| 1317 | goto out; |
| 1318 | } |
| 1319 | r = bus_dmamap_load(vsc->sc_dmat, sc->sc_ctrl_tbl_mc_dmamap, |
| 1320 | sc->sc_ctrl_mac_tbl_mc, |
| 1321 | (sizeof(struct virtio_net_ctrl_mac_tbl) |
| 1322 | + ETHER_ADDR_LEN * sc->sc_ctrl_mac_tbl_mc->nentries), |
| 1323 | NULL, BUS_DMA_WRITE|BUS_DMA_NOWAIT); |
| 1324 | if (r) { |
| 1325 | printf("%s: control command dmamap load failed, " |
| 1326 | "error code %d\n" , device_xname(sc->sc_dev), r); |
| 1327 | bus_dmamap_unload(vsc->sc_dmat, sc->sc_ctrl_tbl_uc_dmamap); |
| 1328 | goto out; |
| 1329 | } |
| 1330 | |
| 1331 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_cmd_dmamap, |
| 1332 | 0, sizeof(struct virtio_net_ctrl_cmd), |
| 1333 | BUS_DMASYNC_PREWRITE); |
| 1334 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_tbl_uc_dmamap, 0, |
| 1335 | (sizeof(struct virtio_net_ctrl_mac_tbl) |
| 1336 | + ETHER_ADDR_LEN * sc->sc_ctrl_mac_tbl_uc->nentries), |
| 1337 | BUS_DMASYNC_PREWRITE); |
| 1338 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_tbl_mc_dmamap, 0, |
| 1339 | (sizeof(struct virtio_net_ctrl_mac_tbl) |
| 1340 | + ETHER_ADDR_LEN * sc->sc_ctrl_mac_tbl_mc->nentries), |
| 1341 | BUS_DMASYNC_PREWRITE); |
| 1342 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_status_dmamap, |
| 1343 | 0, sizeof(struct virtio_net_ctrl_status), |
| 1344 | BUS_DMASYNC_PREREAD); |
| 1345 | |
| 1346 | r = virtio_enqueue_prep(vsc, vq, &slot); |
| 1347 | if (r != 0) |
| 1348 | panic("%s: control vq busy!?" , device_xname(sc->sc_dev)); |
| 1349 | r = virtio_enqueue_reserve(vsc, vq, slot, 4); |
| 1350 | if (r != 0) |
| 1351 | panic("%s: control vq busy!?" , device_xname(sc->sc_dev)); |
| 1352 | virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_cmd_dmamap, true); |
| 1353 | virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_tbl_uc_dmamap, true); |
| 1354 | virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_tbl_mc_dmamap, true); |
| 1355 | virtio_enqueue(vsc, vq, slot, sc->sc_ctrl_status_dmamap, false); |
| 1356 | virtio_enqueue_commit(vsc, vq, slot, true); |
| 1357 | |
| 1358 | /* wait for done */ |
| 1359 | mutex_enter(&sc->sc_ctrl_wait_lock); |
| 1360 | while (sc->sc_ctrl_inuse != DONE) |
| 1361 | cv_wait(&sc->sc_ctrl_wait, &sc->sc_ctrl_wait_lock); |
| 1362 | mutex_exit(&sc->sc_ctrl_wait_lock); |
| 1363 | /* already dequeueued */ |
| 1364 | |
| 1365 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_cmd_dmamap, 0, |
| 1366 | sizeof(struct virtio_net_ctrl_cmd), |
| 1367 | BUS_DMASYNC_POSTWRITE); |
| 1368 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_tbl_uc_dmamap, 0, |
| 1369 | (sizeof(struct virtio_net_ctrl_mac_tbl) |
| 1370 | + ETHER_ADDR_LEN * sc->sc_ctrl_mac_tbl_uc->nentries), |
| 1371 | BUS_DMASYNC_POSTWRITE); |
| 1372 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_tbl_mc_dmamap, 0, |
| 1373 | (sizeof(struct virtio_net_ctrl_mac_tbl) |
| 1374 | + ETHER_ADDR_LEN * sc->sc_ctrl_mac_tbl_mc->nentries), |
| 1375 | BUS_DMASYNC_POSTWRITE); |
| 1376 | bus_dmamap_sync(vsc->sc_dmat, sc->sc_ctrl_status_dmamap, 0, |
| 1377 | sizeof(struct virtio_net_ctrl_status), |
| 1378 | BUS_DMASYNC_POSTREAD); |
| 1379 | bus_dmamap_unload(vsc->sc_dmat, sc->sc_ctrl_tbl_uc_dmamap); |
| 1380 | bus_dmamap_unload(vsc->sc_dmat, sc->sc_ctrl_tbl_mc_dmamap); |
| 1381 | |
| 1382 | if (sc->sc_ctrl_status->ack == VIRTIO_NET_OK) |
| 1383 | r = 0; |
| 1384 | else { |
| 1385 | printf("%s: failed setting rx filter\n" , |
| 1386 | device_xname(sc->sc_dev)); |
| 1387 | r = EIO; |
| 1388 | } |
| 1389 | |
| 1390 | out: |
| 1391 | mutex_enter(&sc->sc_ctrl_wait_lock); |
| 1392 | sc->sc_ctrl_inuse = FREE; |
| 1393 | cv_signal(&sc->sc_ctrl_wait); |
| 1394 | mutex_exit(&sc->sc_ctrl_wait_lock); |
| 1395 | |
| 1396 | return r; |
| 1397 | } |
| 1398 | |
| 1399 | /* ctrl vq interrupt; wake up the command issuer */ |
| 1400 | static int |
| 1401 | vioif_ctrl_vq_done(struct virtqueue *vq) |
| 1402 | { |
| 1403 | struct virtio_softc *vsc = vq->vq_owner; |
| 1404 | struct vioif_softc *sc = device_private(vsc->sc_child); |
| 1405 | int r, slot; |
| 1406 | |
| 1407 | r = virtio_dequeue(vsc, vq, &slot, NULL); |
| 1408 | if (r == ENOENT) |
| 1409 | return 0; |
| 1410 | virtio_dequeue_commit(vsc, vq, slot); |
| 1411 | |
| 1412 | mutex_enter(&sc->sc_ctrl_wait_lock); |
| 1413 | sc->sc_ctrl_inuse = DONE; |
| 1414 | cv_signal(&sc->sc_ctrl_wait); |
| 1415 | mutex_exit(&sc->sc_ctrl_wait_lock); |
| 1416 | |
| 1417 | return 1; |
| 1418 | } |
| 1419 | |
| 1420 | /* |
| 1421 | * If IFF_PROMISC requested, set promiscuous |
| 1422 | * If multicast filter small enough (<=MAXENTRIES) set rx filter |
| 1423 | * If large multicast filter exist use ALLMULTI |
| 1424 | */ |
| 1425 | /* |
| 1426 | * If setting rx filter fails fall back to ALLMULTI |
| 1427 | * If ALLMULTI fails fall back to PROMISC |
| 1428 | */ |
| 1429 | static int |
| 1430 | vioif_rx_filter(struct vioif_softc *sc) |
| 1431 | { |
| 1432 | struct virtio_softc *vsc = sc->sc_virtio; |
| 1433 | struct ifnet *ifp = &sc->sc_ethercom.ec_if; |
| 1434 | struct ether_multi *enm; |
| 1435 | struct ether_multistep step; |
| 1436 | int nentries; |
| 1437 | int promisc = 0, allmulti = 0, rxfilter = 0; |
| 1438 | int r; |
| 1439 | |
| 1440 | if (vsc->sc_nvqs < 3) { /* no ctrl vq; always promisc */ |
| 1441 | ifp->if_flags |= IFF_PROMISC; |
| 1442 | return 0; |
| 1443 | } |
| 1444 | |
| 1445 | if (ifp->if_flags & IFF_PROMISC) { |
| 1446 | promisc = 1; |
| 1447 | goto set; |
| 1448 | } |
| 1449 | |
| 1450 | nentries = -1; |
| 1451 | ETHER_FIRST_MULTI(step, &sc->sc_ethercom, enm); |
| 1452 | while (nentries++, enm != NULL) { |
| 1453 | if (nentries >= VIRTIO_NET_CTRL_MAC_MAXENTRIES) { |
| 1454 | allmulti = 1; |
| 1455 | goto set; |
| 1456 | } |
| 1457 | if (memcmp(enm->enm_addrlo, enm->enm_addrhi, |
| 1458 | ETHER_ADDR_LEN)) { |
| 1459 | allmulti = 1; |
| 1460 | goto set; |
| 1461 | } |
| 1462 | memcpy(sc->sc_ctrl_mac_tbl_mc->macs[nentries], |
| 1463 | enm->enm_addrlo, ETHER_ADDR_LEN); |
| 1464 | ETHER_NEXT_MULTI(step, enm); |
| 1465 | } |
| 1466 | rxfilter = 1; |
| 1467 | |
| 1468 | set: |
| 1469 | if (rxfilter) { |
| 1470 | sc->sc_ctrl_mac_tbl_uc->nentries = 0; |
| 1471 | sc->sc_ctrl_mac_tbl_mc->nentries = nentries; |
| 1472 | r = vioif_set_rx_filter(sc); |
| 1473 | if (r != 0) { |
| 1474 | rxfilter = 0; |
| 1475 | allmulti = 1; /* fallback */ |
| 1476 | } |
| 1477 | } else { |
| 1478 | /* remove rx filter */ |
| 1479 | sc->sc_ctrl_mac_tbl_uc->nentries = 0; |
| 1480 | sc->sc_ctrl_mac_tbl_mc->nentries = 0; |
| 1481 | r = vioif_set_rx_filter(sc); |
| 1482 | /* what to do on failure? */ |
| 1483 | } |
| 1484 | if (allmulti) { |
| 1485 | r = vioif_set_allmulti(sc, true); |
| 1486 | if (r != 0) { |
| 1487 | allmulti = 0; |
| 1488 | promisc = 1; /* fallback */ |
| 1489 | } |
| 1490 | } else { |
| 1491 | r = vioif_set_allmulti(sc, false); |
| 1492 | /* what to do on failure? */ |
| 1493 | } |
| 1494 | if (promisc) { |
| 1495 | r = vioif_set_promisc(sc, true); |
| 1496 | } else { |
| 1497 | r = vioif_set_promisc(sc, false); |
| 1498 | } |
| 1499 | |
| 1500 | return r; |
| 1501 | } |
| 1502 | |
| 1503 | /* change link status */ |
| 1504 | static int |
| 1505 | vioif_updown(struct vioif_softc *sc, bool isup) |
| 1506 | { |
| 1507 | struct virtio_softc *vsc = sc->sc_virtio; |
| 1508 | |
| 1509 | if (!(vsc->sc_features & VIRTIO_NET_F_STATUS)) |
| 1510 | return ENODEV; |
| 1511 | virtio_write_device_config_1(vsc, |
| 1512 | VIRTIO_NET_CONFIG_STATUS, |
| 1513 | isup?VIRTIO_NET_S_LINK_UP:0); |
| 1514 | return 0; |
| 1515 | } |
| 1516 | |
| 1517 | MODULE(MODULE_CLASS_DRIVER, if_vioif, "virtio" ); |
| 1518 | |
| 1519 | #ifdef _MODULE |
| 1520 | #include "ioconf.c" |
| 1521 | #endif |
| 1522 | |
| 1523 | static int |
| 1524 | if_vioif_modcmd(modcmd_t cmd, void *opaque) |
| 1525 | { |
| 1526 | int error = 0; |
| 1527 | |
| 1528 | #ifdef _MODULE |
| 1529 | switch (cmd) { |
| 1530 | case MODULE_CMD_INIT: |
| 1531 | error = config_init_component(cfdriver_ioconf_if_vioif, |
| 1532 | cfattach_ioconf_if_vioif, cfdata_ioconf_if_vioif); |
| 1533 | break; |
| 1534 | case MODULE_CMD_FINI: |
| 1535 | error = config_fini_component(cfdriver_ioconf_if_vioif, |
| 1536 | cfattach_ioconf_if_vioif, cfdata_ioconf_if_vioif); |
| 1537 | break; |
| 1538 | default: |
| 1539 | error = ENOTTY; |
| 1540 | break; |
| 1541 | } |
| 1542 | #endif |
| 1543 | |
| 1544 | return error; |
| 1545 | } |
| 1546 | |