vhost: add APIs to get inflight ring
This patch introduces two APIs. one is for getting inflgiht ring and the other is for getting base. Signed-off-by: Lin Li <lilin24@baidu.com> Signed-off-by: Xun Ni <nixun@baidu.com> Signed-off-by: Yu Zhang <zhangyu31@baidu.com> Signed-off-by: Jin Yu <jin.yu@intel.com> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
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@ -709,6 +709,23 @@ int rte_vhost_get_mem_table(int vid, struct rte_vhost_memory **mem);
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int rte_vhost_get_vhost_vring(int vid, uint16_t vring_idx,
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struct rte_vhost_vring *vring);
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/**
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* Get guest inflight vring info, including inflight ring and resubmit list.
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*
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* @param vid
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* vhost device ID
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* @param vring_idx
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* vring index
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* @param vring
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* the structure to hold the requested inflight vring info
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* @return
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* 0 on success, -1 on failure
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*/
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__rte_experimental
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int
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rte_vhost_get_vhost_ring_inflight(int vid, uint16_t vring_idx,
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struct rte_vhost_ring_inflight *vring);
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/**
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* Set split inflight descriptor.
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*
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@ -885,6 +902,29 @@ int
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rte_vhost_get_vring_base(int vid, uint16_t queue_id,
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uint16_t *last_avail_idx, uint16_t *last_used_idx);
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/**
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* Get last_avail/last_used of the vhost virtqueue
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*
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* This function is designed for the reconnection and it's specific for
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* the packed ring as we can get the two parameters from the inflight
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* queueregion
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*
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* @param vid
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* vhost device ID
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* @param queue_id
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* vhost queue index
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* @param last_avail_idx
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* vhost last_avail_idx to get
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* @param last_used_idx
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* vhost last_used_idx to get
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* @return
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* 0 on success, -1 on failure
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*/
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__rte_experimental
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int
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rte_vhost_get_vring_base_from_inflight(int vid,
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uint16_t queue_id, uint16_t *last_avail_idx, uint16_t *last_used_idx);
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/**
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* Set last_avail/used_idx of the vhost virtqueue
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*
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@ -93,4 +93,6 @@ EXPERIMENTAL {
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rte_vhost_set_last_inflight_io_packed;
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rte_vhost_clr_inflight_desc_split;
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rte_vhost_clr_inflight_desc_packed;
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rte_vhost_get_vhost_ring_inflight;
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rte_vhost_get_vring_base_from_inflight;
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};
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@ -823,6 +823,41 @@ rte_vhost_get_vhost_vring(int vid, uint16_t vring_idx,
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return 0;
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}
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int
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rte_vhost_get_vhost_ring_inflight(int vid, uint16_t vring_idx,
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struct rte_vhost_ring_inflight *vring)
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{
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struct virtio_net *dev;
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struct vhost_virtqueue *vq;
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dev = get_device(vid);
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if (unlikely(!dev))
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return -1;
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if (vring_idx >= VHOST_MAX_VRING)
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return -1;
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vq = dev->virtqueue[vring_idx];
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if (unlikely(!vq))
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return -1;
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if (vq_is_packed(dev)) {
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if (unlikely(!vq->inflight_packed))
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return -1;
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vring->inflight_packed = vq->inflight_packed;
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} else {
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if (unlikely(!vq->inflight_split))
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return -1;
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vring->inflight_split = vq->inflight_split;
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}
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vring->resubmit_inflight = vq->resubmit_inflight;
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return 0;
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}
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int
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rte_vhost_set_inflight_desc_split(int vid, uint16_t vring_idx,
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uint16_t idx)
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@ -1318,6 +1353,32 @@ int rte_vhost_get_vring_base(int vid, uint16_t queue_id,
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return 0;
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}
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int
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rte_vhost_get_vring_base_from_inflight(int vid,
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uint16_t queue_id,
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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 rte_vhost_inflight_info_packed *inflight_info;
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struct virtio_net *dev = get_device(vid);
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if (dev == NULL || last_avail_idx == NULL || last_used_idx == NULL)
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return -1;
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if (!vq_is_packed(dev))
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return -1;
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inflight_info = dev->virtqueue[queue_id]->inflight_packed;
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if (!inflight_info)
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return -1;
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*last_avail_idx = (inflight_info->old_used_wrap_counter << 15) |
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inflight_info->old_used_idx;
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*last_used_idx = *last_avail_idx;
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return 0;
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}
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int rte_vhost_set_vring_base(int vid, uint16_t queue_id,
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uint16_t last_avail_idx, uint16_t last_used_idx)
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{
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