PageRenderTime 23ms CodeModel.GetById 13ms app.highlight 6ms RepoModel.GetById 2ms app.codeStats 0ms

/include/linux/virtio_net.h

https://github.com/airy09/android_kernel_sony_apq8064
C Header | 155 lines | 72 code | 13 blank | 70 comment | 0 complexity | 0de630bf7323ef8925fa77aa0f4e9fb2 MD5 | raw file
  1#ifndef _LINUX_VIRTIO_NET_H
  2#define _LINUX_VIRTIO_NET_H
  3/* This header is BSD licensed so anyone can use the definitions to implement
  4 * compatible drivers/servers.
  5 *
  6 * Redistribution and use in source and binary forms, with or without
  7 * modification, are permitted provided that the following conditions
  8 * are met:
  9 * 1. Redistributions of source code must retain the above copyright
 10 *    notice, this list of conditions and the following disclaimer.
 11 * 2. Redistributions in binary form must reproduce the above copyright
 12 *    notice, this list of conditions and the following disclaimer in the
 13 *    documentation and/or other materials provided with the distribution.
 14 * 3. Neither the name of IBM nor the names of its contributors
 15 *    may be used to endorse or promote products derived from this software
 16 *    without specific prior written permission.
 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 20 * ARE DISCLAIMED.  IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 27 * SUCH DAMAGE. */
 28#include <linux/types.h>
 29#include <linux/virtio_ids.h>
 30#include <linux/virtio_config.h>
 31#include <linux/if_ether.h>
 32
 33/* The feature bitmap for virtio net */
 34#define VIRTIO_NET_F_CSUM	0	/* Host handles pkts w/ partial csum */
 35#define VIRTIO_NET_F_GUEST_CSUM	1	/* Guest handles pkts w/ partial csum */
 36#define VIRTIO_NET_F_MAC	5	/* Host has given MAC address. */
 37#define VIRTIO_NET_F_GSO	6	/* Host handles pkts w/ any GSO type */
 38#define VIRTIO_NET_F_GUEST_TSO4	7	/* Guest can handle TSOv4 in. */
 39#define VIRTIO_NET_F_GUEST_TSO6	8	/* Guest can handle TSOv6 in. */
 40#define VIRTIO_NET_F_GUEST_ECN	9	/* Guest can handle TSO[6] w/ ECN in. */
 41#define VIRTIO_NET_F_GUEST_UFO	10	/* Guest can handle UFO in. */
 42#define VIRTIO_NET_F_HOST_TSO4	11	/* Host can handle TSOv4 in. */
 43#define VIRTIO_NET_F_HOST_TSO6	12	/* Host can handle TSOv6 in. */
 44#define VIRTIO_NET_F_HOST_ECN	13	/* Host can handle TSO[6] w/ ECN in. */
 45#define VIRTIO_NET_F_HOST_UFO	14	/* Host can handle UFO in. */
 46#define VIRTIO_NET_F_MRG_RXBUF	15	/* Host can merge receive buffers. */
 47#define VIRTIO_NET_F_STATUS	16	/* virtio_net_config.status available */
 48#define VIRTIO_NET_F_CTRL_VQ	17	/* Control channel available */
 49#define VIRTIO_NET_F_CTRL_RX	18	/* Control channel RX mode support */
 50#define VIRTIO_NET_F_CTRL_VLAN	19	/* Control channel VLAN filtering */
 51#define VIRTIO_NET_F_CTRL_RX_EXTRA 20	/* Extra RX mode control support */
 52
 53#define VIRTIO_NET_S_LINK_UP	1	/* Link is up */
 54
 55struct virtio_net_config {
 56	/* The config defining mac address (if VIRTIO_NET_F_MAC) */
 57	__u8 mac[6];
 58	/* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */
 59	__u16 status;
 60} __attribute__((packed));
 61
 62/* This is the first element of the scatter-gather list.  If you don't
 63 * specify GSO or CSUM features, you can simply ignore the header. */
 64struct virtio_net_hdr {
 65#define VIRTIO_NET_HDR_F_NEEDS_CSUM	1	// Use csum_start, csum_offset
 66#define VIRTIO_NET_HDR_F_DATA_VALID	2	// Csum is valid
 67	__u8 flags;
 68#define VIRTIO_NET_HDR_GSO_NONE		0	// Not a GSO frame
 69#define VIRTIO_NET_HDR_GSO_TCPV4	1	// GSO frame, IPv4 TCP (TSO)
 70#define VIRTIO_NET_HDR_GSO_UDP		3	// GSO frame, IPv4 UDP (UFO)
 71#define VIRTIO_NET_HDR_GSO_TCPV6	4	// GSO frame, IPv6 TCP
 72#define VIRTIO_NET_HDR_GSO_ECN		0x80	// TCP has ECN set
 73	__u8 gso_type;
 74	__u16 hdr_len;		/* Ethernet + IP + tcp/udp hdrs */
 75	__u16 gso_size;		/* Bytes to append to hdr_len per frame */
 76	__u16 csum_start;	/* Position to start checksumming from */
 77	__u16 csum_offset;	/* Offset after that to place checksum */
 78};
 79
 80/* This is the version of the header to use when the MRG_RXBUF
 81 * feature has been negotiated. */
 82struct virtio_net_hdr_mrg_rxbuf {
 83	struct virtio_net_hdr hdr;
 84	__u16 num_buffers;	/* Number of merged rx buffers */
 85};
 86
 87/*
 88 * Control virtqueue data structures
 89 *
 90 * The control virtqueue expects a header in the first sg entry
 91 * and an ack/status response in the last entry.  Data for the
 92 * command goes in between.
 93 */
 94struct virtio_net_ctrl_hdr {
 95	__u8 class;
 96	__u8 cmd;
 97} __attribute__((packed));
 98
 99typedef __u8 virtio_net_ctrl_ack;
100
101#define VIRTIO_NET_OK     0
102#define VIRTIO_NET_ERR    1
103
104/*
105 * Control the RX mode, ie. promisucous, allmulti, etc...
106 * All commands require an "out" sg entry containing a 1 byte
107 * state value, zero = disable, non-zero = enable.  Commands
108 * 0 and 1 are supported with the VIRTIO_NET_F_CTRL_RX feature.
109 * Commands 2-5 are added with VIRTIO_NET_F_CTRL_RX_EXTRA.
110 */
111#define VIRTIO_NET_CTRL_RX    0
112 #define VIRTIO_NET_CTRL_RX_PROMISC      0
113 #define VIRTIO_NET_CTRL_RX_ALLMULTI     1
114 #define VIRTIO_NET_CTRL_RX_ALLUNI       2
115 #define VIRTIO_NET_CTRL_RX_NOMULTI      3
116 #define VIRTIO_NET_CTRL_RX_NOUNI        4
117 #define VIRTIO_NET_CTRL_RX_NOBCAST      5
118
119/*
120 * Control the MAC filter table.
121 *
122 * The MAC filter table is managed by the hypervisor, the guest should
123 * assume the size is infinite.  Filtering should be considered
124 * non-perfect, ie. based on hypervisor resources, the guest may
125 * received packets from sources not specified in the filter list.
126 *
127 * In addition to the class/cmd header, the TABLE_SET command requires
128 * two out scatterlists.  Each contains a 4 byte count of entries followed
129 * by a concatenated byte stream of the ETH_ALEN MAC addresses.  The
130 * first sg list contains unicast addresses, the second is for multicast.
131 * This functionality is present if the VIRTIO_NET_F_CTRL_RX feature
132 * is available.
133 */
134struct virtio_net_ctrl_mac {
135	__u32 entries;
136	__u8 macs[][ETH_ALEN];
137} __attribute__((packed));
138
139#define VIRTIO_NET_CTRL_MAC    1
140 #define VIRTIO_NET_CTRL_MAC_TABLE_SET        0
141
142/*
143 * Control VLAN filtering
144 *
145 * The VLAN filter table is controlled via a simple ADD/DEL interface.
146 * VLAN IDs not added may be filterd by the hypervisor.  Del is the
147 * opposite of add.  Both commands expect an out entry containing a 2
148 * byte VLAN ID.  VLAN filterting is available with the
149 * VIRTIO_NET_F_CTRL_VLAN feature bit.
150 */
151#define VIRTIO_NET_CTRL_VLAN       2
152 #define VIRTIO_NET_CTRL_VLAN_ADD             0
153 #define VIRTIO_NET_CTRL_VLAN_DEL             1
154
155#endif /* _LINUX_VIRTIO_NET_H */