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net/virtio: add Rx interrupt enable/disable functions

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This patch implements interrupt enable/disable functions for each
Rx queue. And we rely on flags of avail queue as the hint for virtio
device to interrupt virtio driver or not.

Signed-off-by: Jianfeng Tan <jianfeng.tan@intel.com>
Tested-by: Lei Yao <lei.a.yao@intel.com>
Acked-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
This commit is contained in:
Jianfeng Tan 2017-01-17 07:10:25 +00:00 committed by Yuanhan Liu
parent c49526acec
commit c056be239d
3 changed files with 37 additions and 12 deletions
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22
drivers/net/virtio/virtio_ethdev.c
View File

@ -717,6 +717,26 @@ virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
return 0;
}
static int
virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
{
struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
struct virtqueue *vq = rxvq->vq;
virtqueue_enable_intr(vq);
return 0;
}
static int
virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
{
struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
struct virtqueue *vq = rxvq->vq;
virtqueue_disable_intr(vq);
return 0;
}
/*
* dev_ops for virtio, bare necessities for basic operation
*/
@ -738,6 +758,8 @@ static const struct eth_dev_ops virtio_eth_dev_ops = {
.xstats_reset = virtio_dev_stats_reset,
.link_update = virtio_dev_link_update,
.rx_queue_setup = virtio_dev_rx_queue_setup,
.rx_queue_intr_enable = virtio_dev_rx_queue_intr_enable,
.rx_queue_intr_disable = virtio_dev_rx_queue_intr_disable,
.rx_queue_release = virtio_dev_queue_release,
.rx_descriptor_done = virtio_dev_rx_queue_done,
.tx_queue_setup = virtio_dev_tx_queue_setup,

11
drivers/net/virtio/virtqueue.c
View File

@ -38,17 +38,6 @@
#include "virtio_logs.h"
#include "virtio_pci.h"
void
virtqueue_disable_intr(struct virtqueue *vq)
{
/*
* Set VRING_AVAIL_F_NO_INTERRUPT to hint host
* not to interrupt when it consumes packets
* Note: this is only considered a hint to the host
*/
vq->vq_ring.avail->flags |= VRING_AVAIL_F_NO_INTERRUPT;
}
/*
* Two types of mbuf to be cleaned:
* 1) mbuf that has been consumed by backend but not used by virtio.

16
drivers/net/virtio/virtqueue.h
View File

@ -274,7 +274,21 @@ vring_desc_init(struct vring_desc *dp, uint16_t n)
/**
* Tell the backend not to interrupt us.
*/
void virtqueue_disable_intr(struct virtqueue *vq);
static inline void
virtqueue_disable_intr(struct virtqueue *vq)
{
vq->vq_ring.avail->flags |= VRING_AVAIL_F_NO_INTERRUPT;
}
/**
* Tell the backend to interrupt us.
*/
static inline void
virtqueue_enable_intr(struct virtqueue *vq)
{
vq->vq_ring.avail->flags &= (~VRING_AVAIL_F_NO_INTERRUPT);
}
/**
* Dump virtqueue internal structures, for debug purpose only.
*/