net: Add Generic Receive Offload infrastructure

[linux-2.6-omap-h63xx.git] / include / linux / virtio_net.h

diff --git a/include/linux/virtio_net.h b/include/linux/virtio_net.h
index 1ea3351df609474d097b67e4f0df31131257a34f..5cdd0aa8bde94b0d53c37fe8bf463b9d07845c15 100644 (file)
--- a/include/linux/virtio_net.h
+++ b/include/linux/virtio_net.h
@@ -1,14 +1,26 @@
 #ifndef _LINUX_VIRTIO_NET_H
 #define _LINUX_VIRTIO_NET_H
+/* This header is BSD licensed so anyone can use the definitions to implement
+ * compatible drivers/servers. */
 #include <linux/virtio_config.h>
 
 /* The ID for virtio_net */
 #define VIRTIO_ID_NET  1
 
 /* The feature bitmap for virtio net */
-#define VIRTIO_NET_F_CSUM      0       /* Can handle pkts w/ partial csum */
+#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       /* Can handle pkts w/ any GSO type */
+#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. */
 
 struct virtio_net_config
 {
@@ -29,8 +41,16 @@ struct virtio_net_hdr
 #define VIRTIO_NET_HDR_GSO_ECN         0x80    // TCP has ECN set
        __u8 gso_type;
        __u16 hdr_len;          /* Ethernet + IP + tcp/udp hdrs */
-       __u16 gso_size;         /* Bytes to append to gso_hdr_len per frame */
+       __u16 gso_size;         /* Bytes to append to hdr_len per frame */
        __u16 csum_start;       /* Position to start checksumming from */
        __u16 csum_offset;      /* Offset after that to place checksum */
 };
+
+/* 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;
+       __u16 num_buffers;      /* Number of merged rx buffers */
+};
+
 #endif /* _LINUX_VIRTIO_NET_H */