7365504f77
When live migration is done, for the backup VM, either the virtio frontend or the vhost backend needs to send out gratuitous RARP packet to announce its new network location. This patch enables VIRTIO_NET_F_GUEST_ANNOUNCE feature to support live migration scenario where the vhost backend doesn't have the ability to generate RARP packet. Brief introduction of the work flow: 1. QEMU finishes live migration, pokes the backup VM with an interrupt. 2. Virtio interrupt handler reads out the interrupt status value, and realizes it needs to send out RARP packet to announce its location. 3. Pause device to stop worker thread touching the queues. 4. Inject a RARP packet into a Tx Queue. 5. Ack the interrupt via control queue. 6. Resume device to continue packet processing. Signed-off-by: Xiao Wang <xiao.w.wang@intel.com> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com> Acked-by: Yuanhan Liu <yliu@fridaylinux.org>
97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2015 Intel Corporation
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*/
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#ifndef _VIRTIO_ETHDEV_H_
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#define _VIRTIO_ETHDEV_H_
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#include <stdint.h>
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#include "virtio_pci.h"
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#ifndef PAGE_SIZE
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#define PAGE_SIZE 4096
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#endif
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#define VIRTIO_MAX_RX_QUEUES 128U
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#define VIRTIO_MAX_TX_QUEUES 128U
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#define VIRTIO_MAX_MAC_ADDRS 64
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#define VIRTIO_MIN_RX_BUFSIZE 64
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#define VIRTIO_MAX_RX_PKTLEN 9728U
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/* Features desired/implemented by this driver. */
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#define VIRTIO_PMD_DEFAULT_GUEST_FEATURES \
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(1u << VIRTIO_NET_F_MAC | \
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1u << VIRTIO_NET_F_STATUS | \
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1u << VIRTIO_NET_F_MQ | \
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1u << VIRTIO_NET_F_CTRL_MAC_ADDR | \
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1u << VIRTIO_NET_F_CTRL_VQ | \
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1u << VIRTIO_NET_F_CTRL_RX | \
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1u << VIRTIO_NET_F_CTRL_VLAN | \
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1u << VIRTIO_NET_F_CSUM | \
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1u << VIRTIO_NET_F_HOST_TSO4 | \
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1u << VIRTIO_NET_F_HOST_TSO6 | \
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1u << VIRTIO_NET_F_MRG_RXBUF | \
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1u << VIRTIO_NET_F_MTU | \
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1ULL << VIRTIO_NET_F_GUEST_ANNOUNCE | \
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1u << VIRTIO_RING_F_INDIRECT_DESC | \
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1ULL << VIRTIO_F_VERSION_1 | \
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1ULL << VIRTIO_F_IOMMU_PLATFORM)
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#define VIRTIO_PMD_SUPPORTED_GUEST_FEATURES \
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(VIRTIO_PMD_DEFAULT_GUEST_FEATURES | \
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1u << VIRTIO_NET_F_GUEST_CSUM | \
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1u << VIRTIO_NET_F_GUEST_TSO4 | \
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1u << VIRTIO_NET_F_GUEST_TSO6)
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/*
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* CQ function prototype
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*/
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void virtio_dev_cq_start(struct rte_eth_dev *dev);
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/*
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* RX/TX function prototypes
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*/
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int virtio_dev_rx_queue_done(void *rxq, uint16_t offset);
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int virtio_dev_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
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uint16_t nb_rx_desc, unsigned int socket_id,
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const struct rte_eth_rxconf *rx_conf,
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struct rte_mempool *mb_pool);
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int virtio_dev_rx_queue_setup_finish(struct rte_eth_dev *dev,
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uint16_t rx_queue_id);
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int virtio_dev_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
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uint16_t nb_tx_desc, unsigned int socket_id,
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const struct rte_eth_txconf *tx_conf);
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int virtio_dev_tx_queue_setup_finish(struct rte_eth_dev *dev,
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uint16_t tx_queue_id);
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uint16_t virtio_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
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uint16_t nb_pkts);
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uint16_t virtio_recv_mergeable_pkts(void *rx_queue, struct rte_mbuf **rx_pkts,
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uint16_t nb_pkts);
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uint16_t virtio_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
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uint16_t nb_pkts);
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uint16_t virtio_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
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uint16_t nb_pkts);
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uint16_t virtio_xmit_pkts_simple(void *tx_queue, struct rte_mbuf **tx_pkts,
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uint16_t nb_pkts);
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int eth_virtio_dev_init(struct rte_eth_dev *eth_dev);
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void virtio_interrupt_handler(void *param);
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int virtio_dev_pause(struct rte_eth_dev *dev);
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void virtio_dev_resume(struct rte_eth_dev *dev);
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int virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts,
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int nb_pkts);
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#endif /* _VIRTIO_ETHDEV_H_ */
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