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authorRusty Russell <rusty@rustcorp.com.au>2007-10-21 21:03:37 -0400
committerRusty Russell <rusty@rustcorp.com.au>2007-10-23 01:49:54 -0400
commit296f96fcfc160e29c01819c0c7b20c2dc8320edd (patch)
treead9c11fe2f60ca37c4bf736f919c3332cffebd9f /include/linux
parentec3d41c4db4c21164332826ea8d812f94f2f6886 (diff)
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')
-rw-r--r--include/linux/Kbuild1
-rw-r--r--include/linux/virtio_net.h36
2 files changed, 37 insertions, 0 deletions
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index e5208f283a67..b101588a4b5a 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -344,6 +344,7 @@ unifdef-y += utsname.h
344unifdef-y += videodev2.h 344unifdef-y += videodev2.h
345unifdef-y += videodev.h 345unifdef-y += videodev.h
346unifdef-y += virtio_config.h 346unifdef-y += virtio_config.h
347unifdef-y += virtio_net.h
347unifdef-y += wait.h 348unifdef-y += wait.h
348unifdef-y += wanrouter.h 349unifdef-y += wanrouter.h
349unifdef-y += watchdog.h 350unifdef-y += watchdog.h
diff --git a/include/linux/virtio_net.h b/include/linux/virtio_net.h
new file mode 100644
index 000000000000..ae469ae55d36
--- /dev/null
+++ b/include/linux/virtio_net.h
@@ -0,0 +1,36 @@
1#ifndef _LINUX_VIRTIO_NET_H
2#define _LINUX_VIRTIO_NET_H
3#include <linux/virtio_config.h>
4
5/* The ID for virtio_net */
6#define VIRTIO_ID_NET 1
7
8/* The bitmap of config for virtio net */
9#define VIRTIO_CONFIG_NET_F 0x40
10#define VIRTIO_NET_F_NO_CSUM 0
11#define VIRTIO_NET_F_TSO4 1
12#define VIRTIO_NET_F_UFO 2
13#define VIRTIO_NET_F_TSO4_ECN 3
14#define VIRTIO_NET_F_TSO6 4
15
16/* The config defining mac address. */
17#define VIRTIO_CONFIG_NET_MAC_F 0x41
18
19/* This is the first element of the scatter-gather list. If you don't
20 * specify GSO or CSUM features, you can simply ignore the header. */
21struct virtio_net_hdr
22{
23#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset
24 __u8 flags;
25#define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame
26#define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO)
27/* FIXME: Do we need this? If they said they can handle ECN, do they care? */
28#define VIRTIO_NET_HDR_GSO_TCPV4_ECN 2 // GSO frame, IPv4 TCP w/ ECN
29#define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO)
30#define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP
31 __u8 gso_type;
32 __u16 gso_size;
33 __u16 csum_start;
34 __u16 csum_offset;
35};
36#endif /* _LINUX_VIRTIO_NET_H */