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Diffstat (limited to 'examples/vhost_xen/virtio-net.h')
| -rw-r--r-- | examples/vhost_xen/virtio-net.h | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/examples/vhost_xen/virtio-net.h b/examples/vhost_xen/virtio-net.h new file mode 100644 index 00000000..ab697260 --- /dev/null +++ b/examples/vhost_xen/virtio-net.h @@ -0,0 +1,113 @@ +/*- + * 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 |