359 lines
11 KiB
C
359 lines
11 KiB
C
/*-
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* Copyright (c) 2011, Bryan Venteicher <bryanv@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _IF_VTNETVAR_H
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#define _IF_VTNETVAR_H
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struct vtnet_softc;
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struct vtnet_statistics {
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uint64_t mbuf_alloc_failed;
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uint64_t rx_frame_too_large;
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uint64_t rx_enq_replacement_failed;
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uint64_t rx_mergeable_failed;
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uint64_t rx_csum_bad_ethtype;
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uint64_t rx_csum_bad_ipproto;
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uint64_t rx_csum_bad_offset;
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uint64_t rx_csum_bad_proto;
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uint64_t tx_csum_bad_ethtype;
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uint64_t tx_tso_bad_ethtype;
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uint64_t tx_tso_not_tcp;
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uint64_t tx_defragged;
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uint64_t tx_defrag_failed;
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/*
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* These are accumulated from each Rx/Tx queue.
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*/
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uint64_t rx_csum_failed;
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uint64_t rx_csum_offloaded;
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uint64_t rx_task_rescheduled;
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uint64_t tx_csum_offloaded;
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uint64_t tx_tso_offloaded;
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uint64_t tx_task_rescheduled;
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};
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struct vtnet_rxq_stats {
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uint64_t vrxs_ipackets; /* if_ipackets */
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uint64_t vrxs_ibytes; /* if_ibytes */
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uint64_t vrxs_iqdrops; /* if_iqdrops */
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uint64_t vrxs_ierrors; /* if_ierrors */
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uint64_t vrxs_csum;
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uint64_t vrxs_csum_failed;
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uint64_t vrxs_rescheduled;
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};
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struct vtnet_rxq {
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struct mtx vtnrx_mtx;
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struct vtnet_softc *vtnrx_sc;
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struct virtqueue *vtnrx_vq;
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struct sglist *vtnrx_sg;
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int vtnrx_id;
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struct vtnet_rxq_stats vtnrx_stats;
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struct taskqueue *vtnrx_tq;
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struct task vtnrx_intrtask;
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char vtnrx_name[16];
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} __aligned(CACHE_LINE_SIZE);
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#define VTNET_RXQ_LOCK(_rxq) mtx_lock(&(_rxq)->vtnrx_mtx)
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#define VTNET_RXQ_UNLOCK(_rxq) mtx_unlock(&(_rxq)->vtnrx_mtx)
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#define VTNET_RXQ_LOCK_ASSERT(_rxq) \
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mtx_assert(&(_rxq)->vtnrx_mtx, MA_OWNED)
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#define VTNET_RXQ_LOCK_ASSERT_NOTOWNED(_rxq) \
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mtx_assert(&(_rxq)->vtnrx_mtx, MA_NOTOWNED)
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struct vtnet_txq_stats {
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uint64_t vtxs_opackets; /* if_opackets */
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uint64_t vtxs_obytes; /* if_obytes */
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uint64_t vtxs_omcasts; /* if_omcasts */
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uint64_t vtxs_csum;
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uint64_t vtxs_tso;
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uint64_t vtxs_rescheduled;
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};
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struct vtnet_txq {
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struct mtx vtntx_mtx;
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struct vtnet_softc *vtntx_sc;
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struct virtqueue *vtntx_vq;
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struct sglist *vtntx_sg;
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#ifndef VTNET_LEGACY_TX
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struct buf_ring *vtntx_br;
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#endif
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int vtntx_id;
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int vtntx_watchdog;
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struct vtnet_txq_stats vtntx_stats;
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struct taskqueue *vtntx_tq;
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struct task vtntx_intrtask;
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#ifndef VTNET_LEGACY_TX
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struct task vtntx_defrtask;
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#endif
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char vtntx_name[16];
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} __aligned(CACHE_LINE_SIZE);
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#define VTNET_TXQ_LOCK(_txq) mtx_lock(&(_txq)->vtntx_mtx)
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#define VTNET_TXQ_TRYLOCK(_txq) mtx_trylock(&(_txq)->vtntx_mtx)
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#define VTNET_TXQ_UNLOCK(_txq) mtx_unlock(&(_txq)->vtntx_mtx)
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#define VTNET_TXQ_LOCK_ASSERT(_txq) \
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mtx_assert(&(_txq)->vtntx_mtx, MA_OWNED)
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#define VTNET_TXQ_LOCK_ASSERT_NOTOWNED(_txq) \
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mtx_assert(&(_txq)->vtntx_mtx, MA_NOTOWNED)
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struct vtnet_softc {
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device_t vtnet_dev;
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struct ifnet *vtnet_ifp;
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struct vtnet_rxq *vtnet_rxqs;
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struct vtnet_txq *vtnet_txqs;
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uint32_t vtnet_flags;
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#define VTNET_FLAG_SUSPENDED 0x0001
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#define VTNET_FLAG_MAC 0x0002
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#define VTNET_FLAG_CTRL_VQ 0x0004
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#define VTNET_FLAG_CTRL_RX 0x0008
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#define VTNET_FLAG_CTRL_MAC 0x0010
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#define VTNET_FLAG_VLAN_FILTER 0x0020
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#define VTNET_FLAG_TSO_ECN 0x0040
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#define VTNET_FLAG_MRG_RXBUFS 0x0080
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#define VTNET_FLAG_LRO_NOMRG 0x0100
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#define VTNET_FLAG_MULTIQ 0x0200
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#define VTNET_FLAG_INDIRECT 0x0400
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#define VTNET_FLAG_EVENT_IDX 0x0800
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int vtnet_link_active;
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int vtnet_hdr_size;
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int vtnet_rx_process_limit;
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int vtnet_rx_nsegs;
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int vtnet_rx_nmbufs;
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int vtnet_rx_clsize;
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int vtnet_rx_new_clsize;
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int vtnet_tx_intr_thresh;
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int vtnet_tx_nsegs;
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int vtnet_if_flags;
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int vtnet_act_vq_pairs;
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int vtnet_max_vq_pairs;
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struct virtqueue *vtnet_ctrl_vq;
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struct vtnet_mac_filter *vtnet_mac_filter;
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uint32_t *vtnet_vlan_filter;
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uint64_t vtnet_features;
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struct vtnet_statistics vtnet_stats;
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struct callout vtnet_tick_ch;
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struct ifmedia vtnet_media;
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eventhandler_tag vtnet_vlan_attach;
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eventhandler_tag vtnet_vlan_detach;
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struct mtx vtnet_mtx;
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char vtnet_mtx_name[16];
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char vtnet_hwaddr[ETHER_ADDR_LEN];
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};
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/*
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* Maximum number of queue pairs we will autoconfigure to.
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*/
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#define VTNET_MAX_QUEUE_PAIRS 8
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/*
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* Additional completed entries can appear in a virtqueue before we can
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* reenable interrupts. Number of times to retry before scheduling the
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* taskqueue to process the completed entries.
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*/
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#define VTNET_INTR_DISABLE_RETRIES 4
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/*
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* Similarly, additional completed entries can appear in a virtqueue
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* between when lasted checked and before notifying the host. Number
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* of times to retry before scheduling the taskqueue to process the
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* queue.
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*/
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#define VTNET_NOTIFY_RETRIES 4
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/*
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* Fake the media type. The host does not provide us with any real media
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* information.
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*/
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#define VTNET_MEDIATYPE (IFM_ETHER | IFM_10G_T | IFM_FDX)
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/*
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* Number of words to allocate for the VLAN shadow table. There is one
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* bit for each VLAN.
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*/
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#define VTNET_VLAN_FILTER_NWORDS (4096 / 32)
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/*
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* When mergeable buffers are not negotiated, the vtnet_rx_header structure
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* below is placed at the beginning of the mbuf data. Use 4 bytes of pad to
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* both keep the VirtIO header and the data non-contiguous and to keep the
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* frame's payload 4 byte aligned.
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*
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* When mergeable buffers are negotiated, the host puts the VirtIO header in
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* the beginning of the first mbuf's data.
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*/
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#define VTNET_RX_HEADER_PAD 4
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struct vtnet_rx_header {
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struct virtio_net_hdr vrh_hdr;
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char vrh_pad[VTNET_RX_HEADER_PAD];
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} __packed;
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/*
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* For each outgoing frame, the vtnet_tx_header below is allocated from
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* the vtnet_tx_header_zone.
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*/
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struct vtnet_tx_header {
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union {
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struct virtio_net_hdr hdr;
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struct virtio_net_hdr_mrg_rxbuf mhdr;
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} vth_uhdr;
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struct mbuf *vth_mbuf;
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};
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/*
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* The VirtIO specification does not place a limit on the number of MAC
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* addresses the guest driver may request to be filtered. In practice,
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* the host is constrained by available resources. To simplify this driver,
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* impose a reasonably high limit of MAC addresses we will filter before
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* falling back to promiscuous or all-multicast modes.
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*/
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#define VTNET_MAX_MAC_ENTRIES 128
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struct vtnet_mac_table {
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uint32_t nentries;
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uint8_t macs[VTNET_MAX_MAC_ENTRIES][ETHER_ADDR_LEN];
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} __packed;
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struct vtnet_mac_filter {
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struct vtnet_mac_table vmf_unicast;
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uint32_t vmf_pad; /* Make tables non-contiguous. */
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struct vtnet_mac_table vmf_multicast;
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};
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/*
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* The MAC filter table is malloc(9)'d when needed. Ensure it will
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* always fit in one segment.
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*/
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CTASSERT(sizeof(struct vtnet_mac_filter) <= PAGE_SIZE);
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#define VTNET_TX_TIMEOUT 5
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#define VTNET_CSUM_OFFLOAD (CSUM_TCP | CSUM_UDP | CSUM_SCTP)
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#define VTNET_CSUM_OFFLOAD_IPV6 (CSUM_TCP_IPV6 | CSUM_UDP_IPV6 | CSUM_SCTP_IPV6)
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#define VTNET_CSUM_ALL_OFFLOAD \
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(VTNET_CSUM_OFFLOAD | VTNET_CSUM_OFFLOAD_IPV6 | CSUM_TSO)
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/* Features desired/implemented by this driver. */
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#define VTNET_FEATURES \
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(VIRTIO_NET_F_MAC | \
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VIRTIO_NET_F_STATUS | \
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VIRTIO_NET_F_CTRL_VQ | \
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VIRTIO_NET_F_CTRL_RX | \
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VIRTIO_NET_F_CTRL_MAC_ADDR | \
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VIRTIO_NET_F_CTRL_VLAN | \
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VIRTIO_NET_F_CSUM | \
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VIRTIO_NET_F_GSO | \
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VIRTIO_NET_F_HOST_TSO4 | \
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VIRTIO_NET_F_HOST_TSO6 | \
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VIRTIO_NET_F_HOST_ECN | \
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VIRTIO_NET_F_GUEST_CSUM | \
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VIRTIO_NET_F_GUEST_TSO4 | \
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VIRTIO_NET_F_GUEST_TSO6 | \
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VIRTIO_NET_F_GUEST_ECN | \
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VIRTIO_NET_F_MRG_RXBUF | \
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VIRTIO_NET_F_MQ | \
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VIRTIO_RING_F_EVENT_IDX | \
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VIRTIO_RING_F_INDIRECT_DESC)
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/*
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* The VIRTIO_NET_F_HOST_TSO[46] features permit us to send the host
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* frames larger than 1514 bytes.
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*/
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#define VTNET_TSO_FEATURES (VIRTIO_NET_F_GSO | VIRTIO_NET_F_HOST_TSO4 | \
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VIRTIO_NET_F_HOST_TSO6 | VIRTIO_NET_F_HOST_ECN)
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/*
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* The VIRTIO_NET_F_GUEST_TSO[46] features permit the host to send us
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* frames larger than 1514 bytes. We do not yet support software LRO
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* via tcp_lro_rx().
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*/
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#define VTNET_LRO_FEATURES (VIRTIO_NET_F_GUEST_TSO4 | \
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VIRTIO_NET_F_GUEST_TSO6 | VIRTIO_NET_F_GUEST_ECN)
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#define VTNET_MAX_MTU 65536
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#define VTNET_MAX_RX_SIZE 65550
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/*
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* Used to preallocate the Vq indirect descriptors. The first segment
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* is reserved for the header, except for mergeable buffers since the
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* header is placed inline with the data.
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*/
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#define VTNET_MRG_RX_SEGS 1
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#define VTNET_MIN_RX_SEGS 2
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#define VTNET_MAX_RX_SEGS 34
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#define VTNET_MIN_TX_SEGS 4
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#define VTNET_MAX_TX_SEGS 64
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/*
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* Assert we can receive and transmit the maximum with regular
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* size clusters.
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*/
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CTASSERT(((VTNET_MAX_RX_SEGS - 1) * MCLBYTES) >= VTNET_MAX_RX_SIZE);
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CTASSERT(((VTNET_MAX_TX_SEGS - 1) * MCLBYTES) >= VTNET_MAX_MTU);
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/*
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* Number of slots in the Tx bufrings. This value matches most other
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* multiqueue drivers.
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*/
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#define VTNET_DEFAULT_BUFRING_SIZE 4096
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/*
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* Determine how many mbufs are in each receive buffer. For LRO without
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* mergeable buffers, we must allocate an mbuf chain large enough to
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* hold both the vtnet_rx_header and the maximum receivable data.
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*/
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#define VTNET_NEEDED_RX_MBUFS(_sc, _clsize) \
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((_sc)->vtnet_flags & VTNET_FLAG_LRO_NOMRG) == 0 ? 1 : \
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howmany(sizeof(struct vtnet_rx_header) + VTNET_MAX_RX_SIZE, \
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(_clsize))
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#define VTNET_CORE_MTX(_sc) &(_sc)->vtnet_mtx
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#define VTNET_CORE_LOCK(_sc) mtx_lock(VTNET_CORE_MTX((_sc)))
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#define VTNET_CORE_UNLOCK(_sc) mtx_unlock(VTNET_CORE_MTX((_sc)))
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#define VTNET_CORE_LOCK_DESTROY(_sc) mtx_destroy(VTNET_CORE_MTX((_sc)))
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#define VTNET_CORE_LOCK_ASSERT(_sc) \
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mtx_assert(VTNET_CORE_MTX((_sc)), MA_OWNED)
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#define VTNET_CORE_LOCK_ASSERT_NOTOWNED(_sc) \
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mtx_assert(VTNET_CORE_MTX((_sc)), MA_NOTOWNED)
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#define VTNET_CORE_LOCK_INIT(_sc) do { \
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snprintf((_sc)->vtnet_mtx_name, sizeof((_sc)->vtnet_mtx_name), \
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"%s", device_get_nameunit((_sc)->vtnet_dev)); \
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mtx_init(VTNET_CORE_MTX((_sc)), (_sc)->vtnet_mtx_name, \
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"VTNET Core Lock", MTX_DEF); \
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} while (0)
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#endif /* _IF_VTNETVAR_H */
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