1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2011, Bryan Venteicher <bryanv@FreeBSD.org> 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 unmodified, this list of conditions, and the following 12 * disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef _IF_VTNETVAR_H 30 #define _IF_VTNETVAR_H 31 32 #ifdef ALTQ 33 #define VTNET_LEGACY_TX 34 #endif 35 36 struct vtnet_softc; 37 38 struct vtnet_statistics { 39 uint64_t mbuf_alloc_failed; 40 41 uint64_t rx_frame_too_large; 42 uint64_t rx_enq_replacement_failed; 43 uint64_t rx_mergeable_failed; 44 uint64_t rx_csum_bad_ethtype; 45 uint64_t rx_csum_bad_ipproto; 46 uint64_t rx_csum_bad_offset; 47 uint64_t rx_csum_bad_proto; 48 uint64_t tx_csum_unknown_ethtype; 49 uint64_t tx_csum_proto_mismatch; 50 uint64_t tx_tso_not_tcp; 51 uint64_t tx_tso_without_csum; 52 uint64_t tx_defragged; 53 uint64_t tx_defrag_failed; 54 55 /* 56 * These are accumulated from each Rx/Tx queue. 57 */ 58 uint64_t rx_csum_failed; 59 uint64_t rx_csum_offloaded; 60 uint64_t rx_task_rescheduled; 61 uint64_t tx_csum_offloaded; 62 uint64_t tx_tso_offloaded; 63 uint64_t tx_task_rescheduled; 64 }; 65 66 struct vtnet_rxq_stats { 67 uint64_t vrxs_ipackets; /* if_ipackets */ 68 uint64_t vrxs_ibytes; /* if_ibytes */ 69 uint64_t vrxs_iqdrops; /* if_iqdrops */ 70 uint64_t vrxs_ierrors; /* if_ierrors */ 71 uint64_t vrxs_csum; 72 uint64_t vrxs_csum_failed; 73 uint64_t vrxs_host_lro; 74 uint64_t vrxs_rescheduled; 75 }; 76 77 struct vtnet_rxq { 78 struct mtx vtnrx_mtx; 79 struct vtnet_softc *vtnrx_sc; 80 struct virtqueue *vtnrx_vq; 81 struct sglist *vtnrx_sg; 82 int vtnrx_id; 83 struct vtnet_rxq_stats vtnrx_stats; 84 struct taskqueue *vtnrx_tq; 85 struct task vtnrx_intrtask; 86 struct lro_ctrl vtnrx_lro; 87 #ifdef DEV_NETMAP 88 uint32_t vtnrx_nm_refill; 89 struct virtio_net_hdr_mrg_rxbuf vtnrx_shrhdr; 90 #endif /* DEV_NETMAP */ 91 char vtnrx_name[16]; 92 } __aligned(CACHE_LINE_SIZE); 93 94 #define VTNET_RXQ_LOCK(_rxq) mtx_lock(&(_rxq)->vtnrx_mtx) 95 #define VTNET_RXQ_UNLOCK(_rxq) mtx_unlock(&(_rxq)->vtnrx_mtx) 96 #define VTNET_RXQ_LOCK_ASSERT(_rxq) \ 97 mtx_assert(&(_rxq)->vtnrx_mtx, MA_OWNED) 98 #define VTNET_RXQ_LOCK_ASSERT_NOTOWNED(_rxq) \ 99 mtx_assert(&(_rxq)->vtnrx_mtx, MA_NOTOWNED) 100 101 struct vtnet_txq_stats { 102 uint64_t vtxs_opackets; /* if_opackets */ 103 uint64_t vtxs_obytes; /* if_obytes */ 104 uint64_t vtxs_omcasts; /* if_omcasts */ 105 uint64_t vtxs_csum; 106 uint64_t vtxs_tso; 107 uint64_t vtxs_rescheduled; 108 }; 109 110 struct vtnet_txq { 111 struct mtx vtntx_mtx; 112 struct vtnet_softc *vtntx_sc; 113 struct virtqueue *vtntx_vq; 114 struct sglist *vtntx_sg; 115 #ifndef VTNET_LEGACY_TX 116 struct buf_ring *vtntx_br; 117 #endif 118 int vtntx_id; 119 int vtntx_watchdog; 120 int vtntx_intr_threshold; 121 struct vtnet_txq_stats vtntx_stats; 122 struct taskqueue *vtntx_tq; 123 struct task vtntx_intrtask; 124 #ifndef VTNET_LEGACY_TX 125 struct task vtntx_defrtask; 126 #endif 127 #ifdef DEV_NETMAP 128 struct virtio_net_hdr_mrg_rxbuf vtntx_shrhdr; 129 #endif /* DEV_NETMAP */ 130 char vtntx_name[16]; 131 } __aligned(CACHE_LINE_SIZE); 132 133 #define VTNET_TXQ_LOCK(_txq) mtx_lock(&(_txq)->vtntx_mtx) 134 #define VTNET_TXQ_TRYLOCK(_txq) mtx_trylock(&(_txq)->vtntx_mtx) 135 #define VTNET_TXQ_UNLOCK(_txq) mtx_unlock(&(_txq)->vtntx_mtx) 136 #define VTNET_TXQ_LOCK_ASSERT(_txq) \ 137 mtx_assert(&(_txq)->vtntx_mtx, MA_OWNED) 138 #define VTNET_TXQ_LOCK_ASSERT_NOTOWNED(_txq) \ 139 mtx_assert(&(_txq)->vtntx_mtx, MA_NOTOWNED) 140 141 struct vtnet_softc { 142 device_t vtnet_dev; 143 if_t vtnet_ifp; 144 struct vtnet_rxq *vtnet_rxqs; 145 struct vtnet_txq *vtnet_txqs; 146 pfil_head_t vtnet_pfil; 147 uint64_t vtnet_features; 148 149 uint32_t vtnet_flags; 150 #define VTNET_FLAG_MODERN 0x0001 151 #define VTNET_FLAG_MAC 0x0002 152 #define VTNET_FLAG_CTRL_VQ 0x0004 153 #define VTNET_FLAG_CTRL_RX 0x0008 154 #define VTNET_FLAG_CTRL_MAC 0x0010 155 #define VTNET_FLAG_VLAN_FILTER 0x0020 156 #define VTNET_FLAG_TSO_ECN 0x0040 157 #define VTNET_FLAG_MRG_RXBUFS 0x0080 158 #define VTNET_FLAG_LRO_NOMRG 0x0100 159 #define VTNET_FLAG_MQ 0x0200 160 #define VTNET_FLAG_INDIRECT 0x0400 161 #define VTNET_FLAG_EVENT_IDX 0x0800 162 #define VTNET_FLAG_SUSPENDED 0x1000 163 #define VTNET_FLAG_FIXUP_NEEDS_CSUM 0x2000 164 #define VTNET_FLAG_SW_LRO 0x4000 165 166 u_int vtnet_hdr_size; 167 int vtnet_rx_nmbufs; 168 int vtnet_rx_clustersz; 169 int vtnet_rx_nsegs; 170 int vtnet_rx_process_limit; 171 int vtnet_link_active; 172 int vtnet_act_vq_pairs; 173 int vtnet_req_vq_pairs; 174 int vtnet_max_vq_pairs; 175 int vtnet_tx_nsegs; 176 int vtnet_if_flags; 177 u_int vtnet_max_mtu; 178 int vtnet_lro_entry_count; 179 int vtnet_lro_mbufq_depth; 180 181 struct virtqueue *vtnet_ctrl_vq; 182 struct vtnet_mac_filter *vtnet_mac_filter; 183 uint32_t *vtnet_vlan_filter; 184 185 uint64_t vtnet_negotiated_features; 186 struct vtnet_statistics vtnet_stats; 187 struct callout vtnet_tick_ch; 188 struct ifmedia vtnet_media; 189 eventhandler_tag vtnet_vlan_attach; 190 eventhandler_tag vtnet_vlan_detach; 191 192 struct mtx vtnet_mtx; 193 char vtnet_mtx_name[16]; 194 uint8_t vtnet_hwaddr[ETHER_ADDR_LEN]; 195 }; 196 197 static bool 198 vtnet_modern(struct vtnet_softc *sc) 199 { 200 return ((sc->vtnet_flags & VTNET_FLAG_MODERN) != 0); 201 } 202 203 static bool 204 vtnet_software_lro(struct vtnet_softc *sc) 205 { 206 return ((sc->vtnet_flags & VTNET_FLAG_SW_LRO) != 0); 207 } 208 209 /* 210 * Maximum number of queue pairs we will autoconfigure to. 211 */ 212 #define VTNET_MAX_QUEUE_PAIRS 32 213 214 /* 215 * Additional completed entries can appear in a virtqueue before we can 216 * reenable interrupts. Number of times to retry before scheduling the 217 * taskqueue to process the completed entries. 218 */ 219 #define VTNET_INTR_DISABLE_RETRIES 4 220 221 /* 222 * Similarly, additional completed entries can appear in a virtqueue 223 * between when lasted checked and before notifying the host. Number 224 * of times to retry before scheduling the taskqueue to process the 225 * queue. 226 */ 227 #define VTNET_NOTIFY_RETRIES 4 228 229 /* 230 * Number of words to allocate for the VLAN shadow table. There is one 231 * bit for each VLAN. 232 */ 233 #define VTNET_VLAN_FILTER_NWORDS (4096 / 32) 234 235 /* 236 * We depend on all of the hdr structures being even, and matching the standard 237 * length. As well, we depend on two being identally sized (with the same 238 * layout). 239 */ 240 CTASSERT(sizeof(struct virtio_net_hdr_v1) == 12); 241 CTASSERT(sizeof(struct virtio_net_hdr) == 10); 242 CTASSERT(sizeof(struct virtio_net_hdr_mrg_rxbuf) == 243 sizeof(struct virtio_net_hdr_v1)); 244 245 /* 246 * In legacy VirtIO when mergeable buffers are not negotiated, this structure 247 * is placed at the beginning of the mbuf data. Use 4 bytes of pad to keep 248 * both the VirtIO header and the data non-contiguous and the frame's payload 249 * 4 byte aligned. Note this padding would not be necessary if the 250 * VIRTIO_F_ANY_LAYOUT feature was negotiated (but we don't support that yet). 251 * 252 * In modern VirtIO or when mergeable buffers are negotiated, the host puts 253 * the VirtIO header in the beginning of the first mbuf's data. 254 */ 255 #define VTNET_RX_HEADER_PAD 4 256 struct vtnet_rx_header { 257 struct virtio_net_hdr vrh_hdr; 258 char vrh_pad[VTNET_RX_HEADER_PAD]; 259 } __packed; 260 261 /* 262 * For each outgoing frame, the vtnet_tx_header below is allocated from 263 * the vtnet_tx_header_zone. 264 */ 265 struct vtnet_tx_header { 266 union { 267 struct virtio_net_hdr hdr; 268 struct virtio_net_hdr_mrg_rxbuf mhdr; 269 struct virtio_net_hdr_v1 v1hdr; 270 } vth_uhdr; 271 272 struct mbuf *vth_mbuf; 273 }; 274 275 /* 276 * The VirtIO specification does not place a limit on the number of MAC 277 * addresses the guest driver may request to be filtered. In practice, 278 * the host is constrained by available resources. To simplify this driver, 279 * impose a reasonably high limit of MAC addresses we will filter before 280 * falling back to promiscuous or all-multicast modes. 281 */ 282 #define VTNET_MAX_MAC_ENTRIES 128 283 284 /* 285 * The driver version of struct virtio_net_ctrl_mac but with our predefined 286 * number of MAC addresses allocated. This structure is shared with the host, 287 * so nentries field is in the correct VirtIO endianness. 288 */ 289 struct vtnet_mac_table { 290 uint32_t nentries; 291 uint8_t macs[VTNET_MAX_MAC_ENTRIES][ETHER_ADDR_LEN]; 292 } __packed; 293 294 struct vtnet_mac_filter { 295 struct vtnet_mac_table vmf_unicast; 296 uint32_t vmf_pad; /* Make tables non-contiguous. */ 297 struct vtnet_mac_table vmf_multicast; 298 }; 299 300 /* 301 * The MAC filter table is malloc(9)'d when needed. Ensure it will 302 * always fit in one segment. 303 */ 304 CTASSERT(sizeof(struct vtnet_mac_filter) <= PAGE_SIZE); 305 306 #define VTNET_TX_TIMEOUT 5 307 #define VTNET_CSUM_OFFLOAD (CSUM_TCP | CSUM_UDP) 308 #define VTNET_CSUM_OFFLOAD_IPV6 (CSUM_TCP_IPV6 | CSUM_UDP_IPV6) 309 310 #define VTNET_CSUM_ALL_OFFLOAD \ 311 (VTNET_CSUM_OFFLOAD | VTNET_CSUM_OFFLOAD_IPV6 | CSUM_TSO) 312 313 #define VTNET_COMMON_FEATURES \ 314 (VIRTIO_NET_F_MAC | \ 315 VIRTIO_NET_F_STATUS | \ 316 VIRTIO_NET_F_CTRL_GUEST_OFFLOADS | \ 317 VIRTIO_NET_F_MTU | \ 318 VIRTIO_NET_F_CTRL_VQ | \ 319 VIRTIO_NET_F_CTRL_RX | \ 320 VIRTIO_NET_F_CTRL_MAC_ADDR | \ 321 VIRTIO_NET_F_CTRL_VLAN | \ 322 VIRTIO_NET_F_CSUM | \ 323 VIRTIO_NET_F_HOST_TSO4 | \ 324 VIRTIO_NET_F_HOST_TSO6 | \ 325 VIRTIO_NET_F_HOST_ECN | \ 326 VIRTIO_NET_F_GUEST_CSUM | \ 327 VIRTIO_NET_F_GUEST_TSO4 | \ 328 VIRTIO_NET_F_GUEST_TSO6 | \ 329 VIRTIO_NET_F_GUEST_ECN | \ 330 VIRTIO_NET_F_MRG_RXBUF | \ 331 VIRTIO_NET_F_MQ | \ 332 VIRTIO_NET_F_SPEED_DUPLEX | \ 333 VIRTIO_RING_F_EVENT_IDX | \ 334 VIRTIO_RING_F_INDIRECT_DESC) 335 336 #define VTNET_MODERN_FEATURES (VTNET_COMMON_FEATURES) 337 #define VTNET_LEGACY_FEATURES (VTNET_COMMON_FEATURES | VIRTIO_NET_F_GSO) 338 339 /* 340 * The VIRTIO_NET_F_HOST_TSO[46] features permit us to send the host 341 * frames larger than 1514 bytes. 342 */ 343 #define VTNET_TSO_FEATURES (VIRTIO_NET_F_GSO | VIRTIO_NET_F_HOST_TSO4 | \ 344 VIRTIO_NET_F_HOST_TSO6 | VIRTIO_NET_F_HOST_ECN) 345 346 /* 347 * The VIRTIO_NET_F_GUEST_TSO[46] features permit the host to send us 348 * frames larger than 1514 bytes. 349 */ 350 #define VTNET_LRO_FEATURES (VIRTIO_NET_F_GUEST_TSO4 | \ 351 VIRTIO_NET_F_GUEST_TSO6 | VIRTIO_NET_F_GUEST_ECN) 352 353 #define VTNET_MIN_MTU 68 354 #define VTNET_MAX_MTU 65536 355 #define VTNET_MAX_RX_SIZE 65550 356 357 /* 358 * Used to preallocate the VQ indirect descriptors. Modern and mergeable 359 * buffers do not required one segment for the VirtIO header since it is 360 * placed inline at the beginning of the receive buffer. 361 */ 362 #define VTNET_RX_SEGS_HDR_INLINE 1 363 #define VTNET_RX_SEGS_HDR_SEPARATE 2 364 #define VTNET_RX_SEGS_LRO_NOMRG 34 365 #define VTNET_TX_SEGS_MIN 32 366 #define VTNET_TX_SEGS_MAX 64 367 368 CTASSERT(((VTNET_RX_SEGS_LRO_NOMRG - 1) * MCLBYTES) >= VTNET_MAX_RX_SIZE); 369 CTASSERT(((VTNET_TX_SEGS_MAX - 1) * MCLBYTES) >= VTNET_MAX_MTU); 370 371 /* 372 * Number of slots in the Tx bufrings. This value matches most other 373 * multiqueue drivers. 374 */ 375 #define VTNET_DEFAULT_BUFRING_SIZE 4096 376 377 #define VTNET_CORE_MTX(_sc) &(_sc)->vtnet_mtx 378 #define VTNET_CORE_LOCK(_sc) mtx_lock(VTNET_CORE_MTX((_sc))) 379 #define VTNET_CORE_UNLOCK(_sc) mtx_unlock(VTNET_CORE_MTX((_sc))) 380 #define VTNET_CORE_LOCK_DESTROY(_sc) mtx_destroy(VTNET_CORE_MTX((_sc))) 381 #define VTNET_CORE_LOCK_ASSERT(_sc) \ 382 mtx_assert(VTNET_CORE_MTX((_sc)), MA_OWNED) 383 #define VTNET_CORE_LOCK_ASSERT_NOTOWNED(_sc) \ 384 mtx_assert(VTNET_CORE_MTX((_sc)), MA_NOTOWNED) 385 386 #define VTNET_CORE_LOCK_INIT(_sc) do { \ 387 snprintf((_sc)->vtnet_mtx_name, sizeof((_sc)->vtnet_mtx_name), \ 388 "%s", device_get_nameunit((_sc)->vtnet_dev)); \ 389 mtx_init(VTNET_CORE_MTX((_sc)), (_sc)->vtnet_mtx_name, \ 390 "VTNET Core Lock", MTX_DEF); \ 391 } while (0) 392 393 /* 394 * Values for the init_mode argument of vtnet_init_locked(). 395 */ 396 #define VTNET_INIT_NETMAP_ENTER 1 397 #define VTNET_INIT_NETMAP_EXIT 2 398 399 #endif /* _IF_VTNETVAR_H */ 400