002437cd42
Add a new RX_MODE control virtqueue class with commands PROMISC and ALLMULTI and usage documented in virtio-net.h allowing the guest to manipulate packet receiving options. We don't export a feature for this until we also add the MAC filter table. Note, for compatibility with older guest drivers we need to default to promiscuous. Signed-off-by: Alex Williamson <alex.williamson@hp.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6537 c046a42c-6fe2-441c-8c8c-71466251a162
117 lines
3.9 KiB
C
117 lines
3.9 KiB
C
/*
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* Virtio Network Device
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*
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* Copyright IBM, Corp. 2007
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#ifndef _QEMU_VIRTIO_NET_H
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#define _QEMU_VIRTIO_NET_H
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#include "virtio.h"
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#include "net.h"
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#include "pci.h"
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#define ETH_ALEN 6
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/* from Linux's virtio_net.h */
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/* The ID for virtio_net */
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#define VIRTIO_ID_NET 1
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/* The feature bitmap for virtio net */
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#define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */
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#define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */
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#define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */
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#define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */
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#define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */
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#define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */
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#define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */
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#define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */
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#define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */
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#define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */
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#define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */
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#define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */
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#define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */
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#define VIRTIO_NET_F_STATUS 16 /* virtio_net_config.status available */
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#define VIRTIO_NET_F_CTRL_VQ 17 /* Control channel available */
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#define VIRTIO_NET_F_CTRL_RX 18 /* Control channel RX mode support */
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#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
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#define TX_TIMER_INTERVAL 150000 /* 150 us */
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/* Maximum packet size we can receive from tap device: header + 64k */
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#define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
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struct virtio_net_config
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{
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/* The config defining mac address (6 bytes) */
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uint8_t mac[6];
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/* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */
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uint16_t status;
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} __attribute__((packed));
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/* This is the first element of the scatter-gather list. If you don't
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* specify GSO or CSUM features, you can simply ignore the header. */
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struct virtio_net_hdr
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{
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#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset
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uint8_t flags;
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#define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame
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#define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO)
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#define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO)
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#define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP
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#define VIRTIO_NET_HDR_GSO_ECN 0x80 // TCP has ECN set
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uint8_t gso_type;
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uint16_t hdr_len;
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uint16_t gso_size;
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uint16_t csum_start;
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uint16_t csum_offset;
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};
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/* This is the version of the header to use when the MRG_RXBUF
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* feature has been negotiated. */
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struct virtio_net_hdr_mrg_rxbuf
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{
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struct virtio_net_hdr hdr;
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uint16_t num_buffers; /* Number of merged rx buffers */
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};
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void virtio_net_init(PCIBus *bus, NICInfo *nd, int devfn);
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/*
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* Control virtqueue data structures
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*
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* The control virtqueue expects a header in the first sg entry
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* and an ack/status response in the last entry. Data for the
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* command goes in between.
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*/
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struct virtio_net_ctrl_hdr {
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uint8_t class;
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uint8_t cmd;
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};
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typedef uint8_t virtio_net_ctrl_ack;
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#define VIRTIO_NET_OK 0
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#define VIRTIO_NET_ERR 1
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/*
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* Control the RX mode, ie. promisucous and allmulti. PROMISC and
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* ALLMULTI commands require an "out" sg entry containing a 1 byte
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* state value, zero = disable, non-zero = enable. These commands
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* are supported with the VIRTIO_NET_F_CTRL_RX feature.
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*/
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#define VIRTIO_NET_CTRL_RX_MODE 0
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#define VIRTIO_NET_CTRL_RX_MODE_PROMISC 0
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#define VIRTIO_NET_CTRL_RX_MODE_ALLMULTI 1
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#endif
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