mirror of
https://github.com/qemu/qemu.git
synced 2024-11-26 12:23:36 +08:00
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
/*
|
|
* Virtio Network Device
|
|
*
|
|
* Copyright IBM, Corp. 2007
|
|
*
|
|
* Authors:
|
|
* Anthony Liguori <aliguori@us.ibm.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2. See
|
|
* the COPYING file in the top-level directory.
|
|
*
|
|
*/
|
|
|
|
#ifndef _QEMU_VIRTIO_NET_H
|
|
#define _QEMU_VIRTIO_NET_H
|
|
|
|
#include "virtio.h"
|
|
#include "net.h"
|
|
#include "pci.h"
|
|
|
|
#define ETH_ALEN 6
|
|
|
|
/* from Linux's virtio_net.h */
|
|
|
|
/* The ID for virtio_net */
|
|
#define VIRTIO_ID_NET 1
|
|
|
|
/* The feature bitmap for virtio net */
|
|
#define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */
|
|
#define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */
|
|
#define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */
|
|
#define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */
|
|
#define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */
|
|
#define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */
|
|
#define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */
|
|
#define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */
|
|
#define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */
|
|
#define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */
|
|
#define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */
|
|
#define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */
|
|
#define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */
|
|
#define VIRTIO_NET_F_STATUS 16 /* virtio_net_config.status available */
|
|
#define VIRTIO_NET_F_CTRL_VQ 17 /* Control channel available */
|
|
#define VIRTIO_NET_F_CTRL_RX 18 /* Control channel RX mode support */
|
|
|
|
#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
|
|
|
|
#define TX_TIMER_INTERVAL 150000 /* 150 us */
|
|
|
|
/* Maximum packet size we can receive from tap device: header + 64k */
|
|
#define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
|
|
|
|
struct virtio_net_config
|
|
{
|
|
/* The config defining mac address (6 bytes) */
|
|
uint8_t mac[6];
|
|
/* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */
|
|
uint16_t status;
|
|
} __attribute__((packed));
|
|
|
|
/* This is the first element of the scatter-gather list. If you don't
|
|
* specify GSO or CSUM features, you can simply ignore the header. */
|
|
struct virtio_net_hdr
|
|
{
|
|
#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset
|
|
uint8_t flags;
|
|
#define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame
|
|
#define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO)
|
|
#define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO)
|
|
#define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP
|
|
#define VIRTIO_NET_HDR_GSO_ECN 0x80 // TCP has ECN set
|
|
uint8_t gso_type;
|
|
uint16_t hdr_len;
|
|
uint16_t gso_size;
|
|
uint16_t csum_start;
|
|
uint16_t csum_offset;
|
|
};
|
|
|
|
/* This is the version of the header to use when the MRG_RXBUF
|
|
* feature has been negotiated. */
|
|
struct virtio_net_hdr_mrg_rxbuf
|
|
{
|
|
struct virtio_net_hdr hdr;
|
|
uint16_t num_buffers; /* Number of merged rx buffers */
|
|
};
|
|
|
|
void virtio_net_init(PCIBus *bus, NICInfo *nd, int devfn);
|
|
|
|
/*
|
|
* Control virtqueue data structures
|
|
*
|
|
* The control virtqueue expects a header in the first sg entry
|
|
* and an ack/status response in the last entry. Data for the
|
|
* command goes in between.
|
|
*/
|
|
struct virtio_net_ctrl_hdr {
|
|
uint8_t class;
|
|
uint8_t cmd;
|
|
};
|
|
|
|
typedef uint8_t virtio_net_ctrl_ack;
|
|
|
|
#define VIRTIO_NET_OK 0
|
|
#define VIRTIO_NET_ERR 1
|
|
|
|
/*
|
|
* Control the RX mode, ie. promisucous and allmulti. PROMISC and
|
|
* ALLMULTI commands require an "out" sg entry containing a 1 byte
|
|
* state value, zero = disable, non-zero = enable. These commands
|
|
* are supported with the VIRTIO_NET_F_CTRL_RX feature.
|
|
*/
|
|
#define VIRTIO_NET_CTRL_RX_MODE 0
|
|
#define VIRTIO_NET_CTRL_RX_MODE_PROMISC 0
|
|
#define VIRTIO_NET_CTRL_RX_MODE_ALLMULTI 1
|
|
|
|
#endif
|