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vhost: cleanup async enqueue

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This patch removes unnecessary check and function calls, and it changes
appropriate types for internal variables and fixes typos.

Signed-off-by: Jiayu Hu <jiayu.hu@intel.com>
Tested-by: Yinan Wang <yinan.wang@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
This commit is contained in:
Jiayu Hu 2021-01-11 07:16:26 -05:00 committed by Ferruh Yigit
parent a121f17572
commit 9ab57ef196
2 changed files with 13 additions and 12 deletions
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8
lib/librte_vhost/rte_vhost_async.h
View File

@ -112,7 +112,7 @@ struct rte_vhost_async_features {
};
/**
* register a async channel for vhost
* register an async channel for vhost
*
* @param vid
* vhost device id async channel to be attached to
@ -147,8 +147,8 @@ __rte_experimental
int rte_vhost_async_channel_unregister(int vid, uint16_t queue_id);
/**
* This function submit enqueue data to async engine. This function has
* no guranttee to the transfer completion upon return. Applications
* This function submits enqueue data to async engine. This function has
* no guarantee to the transfer completion upon return. Applications
* should poll transfer status by rte_vhost_poll_enqueue_completed()
*
* @param vid
@ -167,7 +167,7 @@ uint16_t rte_vhost_submit_enqueue_burst(int vid, uint16_t queue_id,
struct rte_mbuf **pkts, uint16_t count);
/**
* This function check async completion status for a specific vhost
* This function checks async completion status for a specific vhost
* device queue. Packets which finish copying (enqueue) operation
* will be returned in an array.
*

17
lib/librte_vhost/virtio_net.c
View File

@ -1130,8 +1130,12 @@ async_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq,
}
out:
async_fill_iter(src_it, tlen, src_iovec, tvec_idx);
async_fill_iter(dst_it, tlen, dst_iovec, tvec_idx);
if (tlen) {
async_fill_iter(src_it, tlen, src_iovec, tvec_idx);
async_fill_iter(dst_it, tlen, dst_iovec, tvec_idx);
} else {
src_it->count = 0;
}
return error;
}
@ -1491,10 +1495,9 @@ virtio_dev_rx_async_submit_split(struct virtio_net *dev,
struct rte_vhost_iov_iter *src_it = it_pool;
struct rte_vhost_iov_iter *dst_it = it_pool + 1;
uint16_t n_free_slot, slot_idx = 0;
uint16_t pkt_err = 0;
uint16_t segs_await = 0;
struct async_inflight_info *pkts_info = vq->async_pkts_info;
int n_pkts = 0;
uint32_t n_pkts = 0, pkt_err = 0;
/*
* The ordering between avail index and desc reads need to be enforced.
@ -1549,11 +1552,9 @@ virtio_dev_rx_async_submit_split(struct virtio_net *dev,
/*
* conditions to trigger async device transfer:
* - buffered packet number reaches transfer threshold
* - this is the last packet in the burst enqueue
* - unused async iov number is less than max vhost vector
*/
if (pkt_burst_idx >= VHOST_ASYNC_BATCH_THRESHOLD ||
(pkt_idx == count - 1 && pkt_burst_idx) ||
(VHOST_MAX_ASYNC_VEC / 2 - segs_await <
BUF_VECTOR_MAX)) {
n_pkts = vq->async_ops.transfer_data(dev->vid,
@ -1565,7 +1566,7 @@ virtio_dev_rx_async_submit_split(struct virtio_net *dev,
segs_await = 0;
vq->async_pkts_inflight_n += pkt_burst_idx;
if (unlikely(n_pkts < (int)pkt_burst_idx)) {
if (unlikely(n_pkts < pkt_burst_idx)) {
/*
* log error packets number here and do actual
* error processing when applications poll
@ -1585,7 +1586,7 @@ virtio_dev_rx_async_submit_split(struct virtio_net *dev,
queue_id, tdes, 0, pkt_burst_idx);
vq->async_pkts_inflight_n += pkt_burst_idx;
if (unlikely(n_pkts < (int)pkt_burst_idx))
if (unlikely(n_pkts < pkt_burst_idx))
pkt_err = pkt_burst_idx - n_pkts;
}