ca059fa5e2
Now DPDK vhost lib has been generic enough, that it can be used to implement any vhost-user drivers. For example, this patch implements a very simple vhost-user net driver, mainly for demonstrating how to use those generic vhost APIs. And when the --builtin-net-driver option is used, the example virtio-net driver code will be invoked, instead of the one provided from the vhost library. Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
122 lines
3.9 KiB
C
122 lines
3.9 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2017 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _MAIN_H_
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#define _MAIN_H_
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#include <sys/queue.h>
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#include <rte_ether.h>
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/* Macros for printing using RTE_LOG */
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#define RTE_LOGTYPE_VHOST_CONFIG RTE_LOGTYPE_USER1
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#define RTE_LOGTYPE_VHOST_DATA RTE_LOGTYPE_USER2
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#define RTE_LOGTYPE_VHOST_PORT RTE_LOGTYPE_USER3
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enum {VIRTIO_RXQ, VIRTIO_TXQ, VIRTIO_QNUM};
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#define MAX_PKT_BURST 32 /* Max burst size for RX/TX */
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struct device_statistics {
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uint64_t tx;
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uint64_t tx_total;
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rte_atomic64_t rx_atomic;
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rte_atomic64_t rx_total_atomic;
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};
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struct vhost_queue {
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struct rte_vhost_vring vr;
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uint16_t last_avail_idx;
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uint16_t last_used_idx;
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};
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struct vhost_dev {
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/**< Number of memory regions for gpa to hpa translation. */
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uint32_t nregions_hpa;
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/**< Device MAC address (Obtained on first TX packet). */
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struct ether_addr mac_address;
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/**< RX VMDQ queue number. */
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uint16_t vmdq_rx_q;
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/**< Vlan tag assigned to the pool */
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uint32_t vlan_tag;
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/**< Data core that the device is added to. */
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uint16_t coreid;
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/**< A device is set as ready if the MAC address has been set. */
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volatile uint8_t ready;
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/**< Device is marked for removal from the data core. */
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volatile uint8_t remove;
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int vid;
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uint64_t features;
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size_t hdr_len;
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uint16_t nr_vrings;
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struct rte_vhost_memory *mem;
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struct device_statistics stats;
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TAILQ_ENTRY(vhost_dev) global_vdev_entry;
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TAILQ_ENTRY(vhost_dev) lcore_vdev_entry;
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#define MAX_QUEUE_PAIRS 4
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struct vhost_queue queues[MAX_QUEUE_PAIRS * 2];
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} __rte_cache_aligned;
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TAILQ_HEAD(vhost_dev_tailq_list, vhost_dev);
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#define REQUEST_DEV_REMOVAL 1
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#define ACK_DEV_REMOVAL 0
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/*
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* Structure containing data core specific information.
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*/
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struct lcore_info {
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uint32_t device_num;
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/* Flag to synchronize device removal. */
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volatile uint8_t dev_removal_flag;
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struct vhost_dev_tailq_list vdev_list;
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};
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/* we implement non-extra virtio net features */
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#define VIRTIO_NET_FEATURES 0
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void vs_vhost_net_setup(struct vhost_dev *dev);
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void vs_vhost_net_remove(struct vhost_dev *dev);
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uint16_t vs_enqueue_pkts(struct vhost_dev *dev, uint16_t queue_id,
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struct rte_mbuf **pkts, uint32_t count);
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uint16_t vs_dequeue_pkts(struct vhost_dev *dev, uint16_t queue_id,
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struct rte_mempool *mbuf_pool,
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struct rte_mbuf **pkts, uint16_t count);
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#endif /* _MAIN_H_ */
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