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| author | Rusty Russell <rusty@rustcorp.com.au> | 2007-10-22 11:03:37 +1000 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2007-10-23 15:49:54 +1000 |
| commit | 296f96fcfc160e29c01819c0c7b20c2dc8320edd (patch) | |
| tree | ad9c11fe2f60ca37c4bf736f919c3332cffebd9f /include/linux/virtio_net.h | |
| parent | ec3d41c4db4c21164332826ea8d812f94f2f6886 (diff) | |
| download | op-kernel-dev-296f96fcfc160e29c01819c0c7b20c2dc8320edd.zip op-kernel-dev-296f96fcfc160e29c01819c0c7b20c2dc8320edd.tar.gz | |
Net driver using virtio
The network driver uses two virtqueues: one for input packets and one
for output packets. This has nice locking properties (ie. we don't do
any for recv vs send).
TODO:
1) Big packets.
2) Multi-client devices (maybe separate driver?).
3) Resolve freeing of old xmit skbs (Christian Borntraeger)
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: netdev@vger.kernel.org
Diffstat (limited to 'include/linux/virtio_net.h')
| -rw-r--r-- | include/linux/virtio_net.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/include/linux/virtio_net.h b/include/linux/virtio_net.h new file mode 100644 index 0000000..ae469ae --- /dev/null +++ b/include/linux/virtio_net.h @@ -0,0 +1,36 @@ +#ifndef _LINUX_VIRTIO_NET_H +#define _LINUX_VIRTIO_NET_H +#include <linux/virtio_config.h> + +/* The ID for virtio_net */ +#define VIRTIO_ID_NET 1 + +/* The bitmap of config for virtio net */ +#define VIRTIO_CONFIG_NET_F 0x40 +#define VIRTIO_NET_F_NO_CSUM 0 +#define VIRTIO_NET_F_TSO4 1 +#define VIRTIO_NET_F_UFO 2 +#define VIRTIO_NET_F_TSO4_ECN 3 +#define VIRTIO_NET_F_TSO6 4 + +/* The config defining mac address. */ +#define VIRTIO_CONFIG_NET_MAC_F 0x41 + +/* 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 + __u8 flags; +#define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame +#define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO) +/* FIXME: Do we need this? If they said they can handle ECN, do they care? */ +#define VIRTIO_NET_HDR_GSO_TCPV4_ECN 2 // GSO frame, IPv4 TCP w/ ECN +#define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO) +#define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP + __u8 gso_type; + __u16 gso_size; + __u16 csum_start; + __u16 csum_offset; +}; +#endif /* _LINUX_VIRTIO_NET_H */ |
