1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 * $FreeBSD$ 29 */ 30 31 #ifndef _IF_VTNETVAR_H 32 #define _IF_VTNETVAR_H 33 34 struct vtnet_softc; 35 36 struct vtnet_statistics { 37 uint64_t mbuf_alloc_failed; 38 39 uint64_t rx_frame_too_large; 40 uint64_t rx_enq_replacement_failed; 41 uint64_t rx_mergeable_failed; 42 uint64_t rx_csum_bad_ethtype; 43 uint64_t rx_csum_bad_ipproto; 44 uint64_t rx_csum_bad_offset; 45 uint64_t rx_csum_bad_proto; 46 uint64_t tx_csum_bad_ethtype; 47 uint64_t tx_tso_bad_ethtype; 48 uint64_t tx_tso_not_tcp; 49 uint64_t tx_defragged; 50 uint64_t tx_defrag_failed; 51 52 /* 53 * These are accumulated from each Rx/Tx queue. 54 */ 55 uint64_t rx_csum_failed; 56 uint64_t rx_csum_offloaded; 57 uint64_t rx_task_rescheduled; 58 uint64_t tx_csum_offloaded; 59 uint64_t tx_tso_offloaded; 60 uint64_t tx_task_rescheduled; 61 }; 62 63 struct vtnet_rxq_stats { 64 uint64_t vrxs_ipackets; /* if_ipackets */ 65 uint64_t vrxs_ibytes; /* if_ibytes */ 66 uint64_t vrxs_iqdrops; /* if_iqdrops */ 67 uint64_t vrxs_ierrors; /* if_ierrors */ 68 uint64_t vrxs_csum; 69 uint64_t vrxs_csum_failed; 70 uint64_t vrxs_rescheduled; 71 }; 72 73 struct vtnet_rxq { 74 struct mtx vtnrx_mtx; 75 struct vtnet_softc *vtnrx_sc; 76 struct virtqueue *vtnrx_vq; 77 struct sglist *vtnrx_sg; 78 int vtnrx_id; 79 struct vtnet_rxq_stats vtnrx_stats; 80 struct taskqueue *vtnrx_tq; 81 struct task vtnrx_intrtask; 82 #ifdef DEV_NETMAP 83 struct virtio_net_hdr_mrg_rxbuf vtnrx_shrhdr; 84 #endif /* DEV_NETMAP */ 85 char vtnrx_name[16]; 86 } __aligned(CACHE_LINE_SIZE); 87 88 #define VTNET_RXQ_LOCK(_rxq) mtx_lock(&(_rxq)->vtnrx_mtx) 89 #define VTNET_RXQ_UNLOCK(_rxq) mtx_unlock(&(_rxq)->vtnrx_mtx) 90 #define VTNET_RXQ_LOCK_ASSERT(_rxq) \ 91 mtx_assert(&(_rxq)->vtnrx_mtx, MA_OWNED) 92 #define VTNET_RXQ_LOCK_ASSERT_NOTOWNED(_rxq) \ 93 mtx_assert(&(_rxq)->vtnrx_mtx, MA_NOTOWNED) 94 95 struct vtnet_txq_stats { 96 uint64_t vtxs_opackets; /* if_opackets */ 97 uint64_t vtxs_obytes; /* if_obytes */ 98 uint64_t vtxs_omcasts; /* if_omcasts */ 99 uint64_t vtxs_csum; 100 uint64_t vtxs_tso; 101 uint64_t vtxs_rescheduled; 102 }; 103 104 struct vtnet_txq { 105 struct mtx vtntx_mtx; 106 struct vtnet_softc *vtntx_sc; 107 struct virtqueue *vtntx_vq; 108 struct sglist *vtntx_sg; 109 #ifndef VTNET_LEGACY_TX 110 struct buf_ring *vtntx_br; 111 #endif 112 int vtntx_id; 113 int vtntx_watchdog; 114 struct vtnet_txq_stats vtntx_stats; 115 struct taskqueue *vtntx_tq; 116 struct task vtntx_intrtask; 117 #ifndef VTNET_LEGACY_TX 118 struct task vtntx_defrtask; 119 #endif 120 #ifdef DEV_NETMAP 121 struct virtio_net_hdr_mrg_rxbuf vtntx_shrhdr; 122 #endif /* DEV_NETMAP */ 123 char vtntx_name[16]; 124 } __aligned(CACHE_LINE_SIZE); 125 126 #define VTNET_TXQ_LOCK(_txq) mtx_lock(&(_txq)->vtntx_mtx) 127 #define VTNET_TXQ_TRYLOCK(_txq) mtx_trylock(&(_txq)->vtntx_mtx) 128 #define VTNET_TXQ_UNLOCK(_txq) mtx_unlock(&(_txq)->vtntx_mtx) 129 #define VTNET_TXQ_LOCK_ASSERT(_txq) \ 130 mtx_assert(&(_txq)->vtntx_mtx, MA_OWNED) 131 #define VTNET_TXQ_LOCK_ASSERT_NOTOWNED(_txq) \ 132 mtx_assert(&(_txq)->vtntx_mtx, MA_NOTOWNED) 133 134 struct vtnet_softc { 135 device_t vtnet_dev; 136 struct ifnet *vtnet_ifp; 137 struct vtnet_rxq *vtnet_rxqs; 138 struct vtnet_txq *vtnet_txqs; 139 140 uint32_t vtnet_flags; 141 #define VTNET_FLAG_SUSPENDED 0x0001 142 #define VTNET_FLAG_MAC 0x0002 143 #define VTNET_FLAG_CTRL_VQ 0x0004 144 #define VTNET_FLAG_CTRL_RX 0x0008 145 #define VTNET_FLAG_CTRL_MAC 0x0010 146 #define VTNET_FLAG_VLAN_FILTER 0x0020 147 #define VTNET_FLAG_TSO_ECN 0x0040 148 #define VTNET_FLAG_MRG_RXBUFS 0x0080 149 #define VTNET_FLAG_LRO_NOMRG 0x0100 150 #define VTNET_FLAG_MULTIQ 0x0200 151 #define VTNET_FLAG_INDIRECT 0x0400 152 #define VTNET_FLAG_EVENT_IDX 0x0800 153 154 int vtnet_link_active; 155 int vtnet_hdr_size; 156 int vtnet_rx_process_limit; 157 int vtnet_rx_nsegs; 158 int vtnet_rx_nmbufs; 159 int vtnet_rx_clsize; 160 int vtnet_rx_new_clsize; 161 int vtnet_tx_intr_thresh; 162 int vtnet_tx_nsegs; 163 int vtnet_if_flags; 164 int vtnet_act_vq_pairs; 165 int vtnet_max_vq_pairs; 166 int vtnet_requested_vq_pairs; 167 168 struct virtqueue *vtnet_ctrl_vq; 169 struct vtnet_mac_filter *vtnet_mac_filter; 170 uint32_t *vtnet_vlan_filter; 171 172 uint64_t vtnet_features; 173 struct vtnet_statistics vtnet_stats; 174 struct callout vtnet_tick_ch; 175 struct ifmedia vtnet_media; 176 eventhandler_tag vtnet_vlan_attach; 177 eventhandler_tag vtnet_vlan_detach; 178 179 struct mtx vtnet_mtx; 180 char vtnet_mtx_name[16]; 181 char vtnet_hwaddr[ETHER_ADDR_LEN]; 182 }; 183 184 /* 185 * Maximum number of queue pairs we will autoconfigure to. 186 */ 187 #define VTNET_MAX_QUEUE_PAIRS 8 188 189 /* 190 * Additional completed entries can appear in a virtqueue before we can 191 * reenable interrupts. Number of times to retry before scheduling the 192 * taskqueue to process the completed entries. 193 */ 194 #define VTNET_INTR_DISABLE_RETRIES 4 195 196 /* 197 * Similarly, additional completed entries can appear in a virtqueue 198 * between when lasted checked and before notifying the host. Number 199 * of times to retry before scheduling the taskqueue to process the 200 * queue. 201 */ 202 #define VTNET_NOTIFY_RETRIES 4 203 204 /* 205 * Fake the media type. The host does not provide us with any real media 206 * information. 207 */ 208 #define VTNET_MEDIATYPE (IFM_ETHER | IFM_10G_T | IFM_FDX) 209 210 /* 211 * Number of words to allocate for the VLAN shadow table. There is one 212 * bit for each VLAN. 213 */ 214 #define VTNET_VLAN_FILTER_NWORDS (4096 / 32) 215 216 /* 217 * When mergeable buffers are not negotiated, the vtnet_rx_header structure 218 * below is placed at the beginning of the mbuf data. Use 4 bytes of pad to 219 * both keep the VirtIO header and the data non-contiguous and to keep the 220 * frame's payload 4 byte aligned. 221 * 222 * When mergeable buffers are negotiated, the host puts the VirtIO header in 223 * the beginning of the first mbuf's data. 224 */ 225 #define VTNET_RX_HEADER_PAD 4 226 struct vtnet_rx_header { 227 struct virtio_net_hdr vrh_hdr; 228 char vrh_pad[VTNET_RX_HEADER_PAD]; 229 } __packed; 230 231 /* 232 * For each outgoing frame, the vtnet_tx_header below is allocated from 233 * the vtnet_tx_header_zone. 234 */ 235 struct vtnet_tx_header { 236 union { 237 struct virtio_net_hdr hdr; 238 struct virtio_net_hdr_mrg_rxbuf mhdr; 239 } vth_uhdr; 240 241 struct mbuf *vth_mbuf; 242 }; 243 244 /* 245 * The VirtIO specification does not place a limit on the number of MAC 246 * addresses the guest driver may request to be filtered. In practice, 247 * the host is constrained by available resources. To simplify this driver, 248 * impose a reasonably high limit of MAC addresses we will filter before 249 * falling back to promiscuous or all-multicast modes. 250 */ 251 #define VTNET_MAX_MAC_ENTRIES 128 252 253 struct vtnet_mac_table { 254 uint32_t nentries; 255 uint8_t macs[VTNET_MAX_MAC_ENTRIES][ETHER_ADDR_LEN]; 256 } __packed; 257 258 struct vtnet_mac_filter { 259 struct vtnet_mac_table vmf_unicast; 260 uint32_t vmf_pad; /* Make tables non-contiguous. */ 261 struct vtnet_mac_table vmf_multicast; 262 }; 263 264 /* 265 * The MAC filter table is malloc(9)'d when needed. Ensure it will 266 * always fit in one segment. 267 */ 268 CTASSERT(sizeof(struct vtnet_mac_filter) <= PAGE_SIZE); 269 270 #define VTNET_TX_TIMEOUT 5 271 #define VTNET_CSUM_OFFLOAD (CSUM_TCP | CSUM_UDP) 272 #define VTNET_CSUM_OFFLOAD_IPV6 (CSUM_TCP_IPV6 | CSUM_UDP_IPV6) 273 274 #define VTNET_CSUM_ALL_OFFLOAD \ 275 (VTNET_CSUM_OFFLOAD | VTNET_CSUM_OFFLOAD_IPV6 | CSUM_TSO) 276 277 /* Features desired/implemented by this driver. */ 278 #define VTNET_FEATURES \ 279 (VIRTIO_NET_F_MAC | \ 280 VIRTIO_NET_F_STATUS | \ 281 VIRTIO_NET_F_CTRL_VQ | \ 282 VIRTIO_NET_F_CTRL_RX | \ 283 VIRTIO_NET_F_CTRL_MAC_ADDR | \ 284 VIRTIO_NET_F_CTRL_VLAN | \ 285 VIRTIO_NET_F_CSUM | \ 286 VIRTIO_NET_F_GSO | \ 287 VIRTIO_NET_F_HOST_TSO4 | \ 288 VIRTIO_NET_F_HOST_TSO6 | \ 289 VIRTIO_NET_F_HOST_ECN | \ 290 VIRTIO_NET_F_GUEST_CSUM | \ 291 VIRTIO_NET_F_GUEST_TSO4 | \ 292 VIRTIO_NET_F_GUEST_TSO6 | \ 293 VIRTIO_NET_F_GUEST_ECN | \ 294 VIRTIO_NET_F_MRG_RXBUF | \ 295 VIRTIO_NET_F_MQ | \ 296 VIRTIO_RING_F_EVENT_IDX | \ 297 VIRTIO_RING_F_INDIRECT_DESC) 298 299 /* 300 * The VIRTIO_NET_F_HOST_TSO[46] features permit us to send the host 301 * frames larger than 1514 bytes. 302 */ 303 #define VTNET_TSO_FEATURES (VIRTIO_NET_F_GSO | VIRTIO_NET_F_HOST_TSO4 | \ 304 VIRTIO_NET_F_HOST_TSO6 | VIRTIO_NET_F_HOST_ECN) 305 306 /* 307 * The VIRTIO_NET_F_GUEST_TSO[46] features permit the host to send us 308 * frames larger than 1514 bytes. We do not yet support software LRO 309 * via tcp_lro_rx(). 310 */ 311 #define VTNET_LRO_FEATURES (VIRTIO_NET_F_GUEST_TSO4 | \ 312 VIRTIO_NET_F_GUEST_TSO6 | VIRTIO_NET_F_GUEST_ECN) 313 314 #define VTNET_MAX_MTU 65536 315 #define VTNET_MAX_RX_SIZE 65550 316 317 /* 318 * Used to preallocate the Vq indirect descriptors. The first segment 319 * is reserved for the header, except for mergeable buffers since the 320 * header is placed inline with the data. 321 */ 322 #define VTNET_MRG_RX_SEGS 1 323 #define VTNET_MIN_RX_SEGS 2 324 #define VTNET_MAX_RX_SEGS 34 325 #define VTNET_MIN_TX_SEGS 32 326 #define VTNET_MAX_TX_SEGS 64 327 328 /* 329 * Assert we can receive and transmit the maximum with regular 330 * size clusters. 331 */ 332 CTASSERT(((VTNET_MAX_RX_SEGS - 1) * MCLBYTES) >= VTNET_MAX_RX_SIZE); 333 CTASSERT(((VTNET_MAX_TX_SEGS - 1) * MCLBYTES) >= VTNET_MAX_MTU); 334 335 /* 336 * Number of slots in the Tx bufrings. This value matches most other 337 * multiqueue drivers. 338 */ 339 #define VTNET_DEFAULT_BUFRING_SIZE 4096 340 341 /* 342 * Determine how many mbufs are in each receive buffer. For LRO without 343 * mergeable buffers, we must allocate an mbuf chain large enough to 344 * hold both the vtnet_rx_header and the maximum receivable data. 345 */ 346 #define VTNET_NEEDED_RX_MBUFS(_sc, _clsize) \ 347 ((_sc)->vtnet_flags & VTNET_FLAG_LRO_NOMRG) == 0 ? 1 : \ 348 howmany(sizeof(struct vtnet_rx_header) + VTNET_MAX_RX_SIZE, \ 349 (_clsize)) 350 351 #define VTNET_CORE_MTX(_sc) &(_sc)->vtnet_mtx 352 #define VTNET_CORE_LOCK(_sc) mtx_lock(VTNET_CORE_MTX((_sc))) 353 #define VTNET_CORE_UNLOCK(_sc) mtx_unlock(VTNET_CORE_MTX((_sc))) 354 #define VTNET_CORE_LOCK_DESTROY(_sc) mtx_destroy(VTNET_CORE_MTX((_sc))) 355 #define VTNET_CORE_LOCK_ASSERT(_sc) \ 356 mtx_assert(VTNET_CORE_MTX((_sc)), MA_OWNED) 357 #define VTNET_CORE_LOCK_ASSERT_NOTOWNED(_sc) \ 358 mtx_assert(VTNET_CORE_MTX((_sc)), MA_NOTOWNED) 359 360 #define VTNET_CORE_LOCK_INIT(_sc) do { \ 361 snprintf((_sc)->vtnet_mtx_name, sizeof((_sc)->vtnet_mtx_name), \ 362 "%s", device_get_nameunit((_sc)->vtnet_dev)); \ 363 mtx_init(VTNET_CORE_MTX((_sc)), (_sc)->vtnet_mtx_name, \ 364 "VTNET Core Lock", MTX_DEF); \ 365 } while (0) 366 367 #endif /* _IF_VTNETVAR_H */ 368