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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _VIRTIO_NET_H_
#define _VIRTIO_NET_H_
#include <stdint.h>
#define VQ_DESC_NUM 256
/* Used to indicate that the device is running on a data core */
#define VIRTIO_DEV_RUNNING 1
/*
* Structure contains variables relevant to TX/RX virtqueues.
*/
struct vhost_virtqueue
{
struct vring_desc *desc; /* Virtqueue descriptor ring. */
struct vring_avail *avail; /* Virtqueue available ring. */
struct vring_used *used; /* Virtqueue used ring. */
uint32_t size; /* Size of descriptor ring. */
uint32_t vhost_hlen; /* Vhost header length (varies depending on RX merge buffers. */
volatile uint16_t last_used_idx; /* Last index used on the available ring */
volatile uint16_t last_used_idx_res; /* Used for multiple devices reserving buffers. */
} __rte_cache_aligned;
/*
* Device structure contains all configuration information relating to the device.
*/
struct virtio_net
{
struct vhost_virtqueue *virtqueue_tx; /* Contains all TX virtqueue information. */
struct vhost_virtqueue *virtqueue_rx; /* Contains all RX virtqueue information. */
struct virtio_memory *mem; /* QEMU memory and memory region information. */
struct ether_addr mac_address; /* Device MAC address (Obtained on first TX packet). */
uint32_t flags; /* Device flags. Only used to check if device is running on data core. */
uint32_t vlan_tag; /* Vlan tag for device. Currently set to device_id (0-63). */
uint32_t vmdq_rx_q;
uint64_t device_fh; /* device identifier. */
uint16_t coreid;
volatile uint8_t ready; /* A device is set as ready if the MAC address has been set. */
volatile uint8_t remove; /* Device is marked for removal from the data core. */
uint32_t virtio_idx; /* Index of virtio device */
uint32_t dom_id; /* Domain id of xen guest */
} ___rte_cache_aligned;
/*
* Device linked list structure for configuration.
*/
struct virtio_net_config_ll
{
struct virtio_net dev; /* Virtio device. */
struct virtio_net_config_ll *next; /* Next entry on linked list. */
};
/*
* Information relating to memory regions including offsets to addresses in QEMUs memory file.
*/
struct virtio_memory_regions {
uint64_t guest_phys_address; /* Base guest physical address of region. */
uint64_t guest_phys_address_end; /* End guest physical address of region. */
uint64_t memory_size; /* Size of region. */
uint64_t userspace_address; /* Base userspace address of region. */
uint64_t address_offset; /* Offset of region for address translation. */
};
/*
* Memory structure includes region and mapping information.
*/
struct virtio_memory {
uint32_t nregions; /* Number of memory regions. */
struct virtio_memory_regions regions[0]; /* Memory region information. */
};
/*
* Device operations to add/remove device.
*/
struct virtio_net_device_ops {
int (* new_device)(struct virtio_net *); /* Add device. */
void (* destroy_device) (volatile struct virtio_net *); /* Remove device. */
};
#endif
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