/*- * Copyright (c) 2011, Bryan Venteicher * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice unmodified, this list of conditions, and the following * disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef _IF_VTNETVAR_H #define _IF_VTNETVAR_H struct vtnet_statistics { uint64_t mbuf_alloc_failed; uint64_t rx_frame_too_large; uint64_t rx_enq_replacement_failed; uint64_t rx_mergeable_failed; uint64_t rx_csum_bad_ethtype; uint64_t rx_csum_bad_ipproto; uint64_t rx_csum_bad_offset; uint64_t rx_csum_failed; uint64_t rx_csum_offloaded; uint64_t rx_task_rescheduled; uint64_t tx_csum_offloaded; uint64_t tx_tso_offloaded; uint64_t tx_csum_bad_ethtype; uint64_t tx_tso_bad_ethtype; uint64_t tx_defragged; uint64_t tx_defrag_failed; uint64_t tx_task_rescheduled; }; struct irqmap { int irq; driver_intr_t *handler; }; struct vtnet_softc { device_t vtnet_dev; struct ifnet *vtnet_ifp; struct lwkt_serialize vtnet_slz; struct lwkt_serialize vtnet_rx_slz; struct lwkt_serialize vtnet_tx_slz; struct lwkt_serialize *serializes[3]; uint32_t vtnet_flags; #define VTNET_FLAG_LINK 0x0001 #define VTNET_FLAG_SUSPENDED 0x0002 #define VTNET_FLAG_MAC 0x0004 #define VTNET_FLAG_CTRL_VQ 0x0008 #define VTNET_FLAG_CTRL_RX 0x0010 #define VTNET_FLAG_CTRL_MAC 0x0020 #define VTNET_FLAG_VLAN_FILTER 0x0040 #define VTNET_FLAG_TSO_ECN 0x0080 #define VTNET_FLAG_MRG_RXBUFS 0x0100 #define VTNET_FLAG_LRO_NOMRG 0x0200 #define VTNET_FLAG_INDIRECT 0x0400 struct virtqueue *vtnet_rx_vq; struct virtqueue *vtnet_tx_vq; struct virtqueue *vtnet_ctrl_vq; /* controlq, rx, tx and config_change */ int vtnet_cpus[4]; int vtnet_nintr; struct irqmap vtnet_irqmap[2]; struct lwkt_serialize *vtnet_intr_slz[3]; int vtnet_txhdrcount; struct vtnet_tx_header *vtnet_txhdrarea; SLIST_HEAD(, vtnet_tx_header) vtnet_txhdr_free; struct vtnet_mac_filter *vtnet_macfilter; int vtnet_hdr_size; int vtnet_tx_size; int vtnet_tx_nsegs; int vtnet_rx_process_limit; int vtnet_rx_nsegs; int vtnet_rx_mbuf_size; int vtnet_rx_mbuf_count; int vtnet_if_flags; struct ifsubq_watchdog vtnet_tx_watchdog; uint64_t vtnet_features; struct vtnet_statistics vtnet_stats; eventhandler_tag vtnet_vlan_attach; eventhandler_tag vtnet_vlan_detach; struct ifmedia vtnet_media; /* * Fake media type; the host does not provide us with * any real media information. */ #define VTNET_MEDIATYPE (IFM_ETHER | IFM_1000_T | IFM_FDX) char vtnet_hwaddr[ETHER_ADDR_LEN]; /* * During reset, the host's VLAN filtering table is lost. The * array below is used to restore all the VLANs configured on * this interface after a reset. */ #define VTNET_VLAN_SHADOW_SIZE (4096 / 32) int vtnet_nvlans; uint32_t vtnet_vlan_shadow[VTNET_VLAN_SHADOW_SIZE]; }; /* * When mergeable buffers are not negotiated, the vtnet_rx_header structure * below is placed at the beginning of the mbuf data. Use 2 bytes of pad to * both keep the VirtIO header and the data non-contiguous and to keep the * frame's payload 4 byte aligned. * * When mergeable buffers are negotiated, the host puts the VirtIO header in * the beginning of the first mbuf's data. */ #define VTNET_RX_HEADER_PAD 2 struct vtnet_rx_header { struct virtio_net_hdr vrh_hdr; char vrh_pad[VTNET_RX_HEADER_PAD]; } __packed; /* * For each outgoing frame, the vtnet_tx_header below is allocated from * a free-list. */ struct vtnet_tx_header { union { struct virtio_net_hdr hdr; struct virtio_net_hdr_mrg_rxbuf mhdr; } vth_uhdr; struct mbuf *vth_mbuf; SLIST_ENTRY(vtnet_tx_header) link; }; /* * The VirtIO specification does not place a limit on the number of MAC * addresses the guest driver may request to be filtered. In practice, * the host is constrained by available resources. To simplify this driver, * impose a reasonably high limit of MAC addresses we will filter before * falling back to promiscuous or all-multicast modes. */ #define VTNET_MAX_MAC_ENTRIES 128 struct vtnet_mac_table { uint32_t nentries; uint8_t macs[VTNET_MAX_MAC_ENTRIES][ETHER_ADDR_LEN]; } __packed; struct vtnet_mac_filter { struct vtnet_mac_table vmf_unicast; uint32_t vmf_pad; /* Make tables non-contiguous. */ struct vtnet_mac_table vmf_multicast; }; #define VTNET_WATCHDOG_TIMEOUT 5 #define VTNET_CSUM_OFFLOAD (CSUM_TCP | CSUM_UDP) /* Features desired/implemented by this driver. */ #define VTNET_FEATURES \ (VIRTIO_NET_F_MAC | \ VIRTIO_NET_F_STATUS | \ VIRTIO_NET_F_CTRL_VQ | \ VIRTIO_NET_F_CTRL_RX | \ VIRTIO_NET_F_CTRL_MAC_ADDR | \ VIRTIO_NET_F_CTRL_VLAN | \ VIRTIO_NET_F_CSUM | \ VIRTIO_NET_F_HOST_TSO4 | \ VIRTIO_NET_F_HOST_TSO6 | \ VIRTIO_NET_F_HOST_ECN | \ VIRTIO_NET_F_GUEST_CSUM | \ VIRTIO_NET_F_GUEST_TSO4 | \ VIRTIO_NET_F_GUEST_TSO6 | \ VIRTIO_NET_F_GUEST_ECN | \ VIRTIO_NET_F_MRG_RXBUF | \ VIRTIO_RING_F_INDIRECT_DESC) /* * The VIRTIO_NET_F_GUEST_TSO[46] features permit the host to send us * frames larger than 1514 bytes. We do not yet support software LRO * via tcp_lro_rx(). */ #define VTNET_LRO_FEATURES (VIRTIO_NET_F_GUEST_TSO4 | \ VIRTIO_NET_F_GUEST_TSO6 | VIRTIO_NET_F_GUEST_ECN) #define VTNET_MAX_MTU 65536 #define VTNET_MAX_RX_SIZE 65550 /* * Used to preallocate the Vq indirect descriptors. The first segment * is reserved for the header. */ #define VTNET_MRG_RX_SEGS 1 #define VTNET_MIN_RX_SEGS 2 #define VTNET_MAX_RX_SEGS 34 #define VTNET_MIN_TX_SEGS 4 #define VTNET_MAX_TX_SEGS 64 #if 0 /* Copied from FreeBSD's net/if.h at some time, but not usable. */ #define IFCAP_LRO 0x00400 /* can do Large Receive Offload */ #define IFCAP_VLAN_HWFILTER 0x10000 /* interface hw can filter vlan tag */ #define IFCAP_VLAN_HWTSO 0x40000 /* can do IFCAP_TSO on VLANs */ #endif /* * This allows lots of code to at least build, even if it's never executed * at the moment. */ #ifndef IFCAP_VLAN_HWFILTER #define IFCAP_VLAN_HWFILTER 0 #endif #ifndef IFCAP_VLAN_HWTSO #define IFCAP_VLAN_HWTSO 0 #endif /* * Assert we can receive and transmit the maximum with regular * size clusters. */ CTASSERT(((VTNET_MAX_RX_SEGS - 1) * MCLBYTES) >= VTNET_MAX_RX_SIZE); CTASSERT(((VTNET_MAX_TX_SEGS - 1) * MCLBYTES) >= VTNET_MAX_MTU); /* * Determine how many mbufs are in each receive buffer. For LRO without * mergeable buffers, we must allocate an mbuf chain large enough to * hold both the vtnet_rx_header and the maximum receivable data. */ #define VTNET_NEEDED_RX_MBUFS(_sc) \ ((_sc)->vtnet_flags & VTNET_FLAG_LRO_NOMRG) == 0 ? 1 : \ howmany(sizeof(struct vtnet_rx_header) + VTNET_MAX_RX_SIZE, \ (_sc)->vtnet_rx_mbuf_size) #endif /* _IF_VTNETVAR_H */