From: Xuan Ding <xuan.d...@intel.com>
This patch refactors copy_desc_to_mbuf() used by the sync
path to support both sync and async descriptor to mbuf filling.
Signed-off-by: Xuan Ding <xuan.d...@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coque...@redhat.com>
---
lib/vhost/vhost.h | 1 +
lib/vhost/virtio_net.c | 48 ++++++++++++++++++++++++++++++++----------
2 files changed, 38 insertions(+), 11 deletions(-)
diff --git a/lib/vhost/vhost.h b/lib/vhost/vhost.h
index a9edc271aa..00744b234f 100644
--- a/lib/vhost/vhost.h
+++ b/lib/vhost/vhost.h
@@ -180,6 +180,7 @@ struct async_inflight_info {
struct rte_mbuf *mbuf;
uint16_t descs; /* num of descs inflight */
uint16_t nr_buffers; /* num of buffers inflight for packed ring */
+ struct virtio_net_hdr nethdr;
};
struct vhost_async {
diff --git a/lib/vhost/virtio_net.c b/lib/vhost/virtio_net.c
index a9e2dcd9ce..5904839d5c 100644
--- a/lib/vhost/virtio_net.c
+++ b/lib/vhost/virtio_net.c
@@ -2487,10 +2487,10 @@ copy_vnet_hdr_from_desc(struct virtio_net_hdr *hdr,
}
static __rte_always_inline int
-copy_desc_to_mbuf(struct virtio_net *dev, struct vhost_virtqueue *vq,
+desc_to_mbuf(struct virtio_net *dev, struct vhost_virtqueue *vq,
struct buf_vector *buf_vec, uint16_t nr_vec,
struct rte_mbuf *m, struct rte_mempool *mbuf_pool,
- bool legacy_ol_flags)
+ bool legacy_ol_flags, uint16_t slot_idx, bool is_async)
{
uint32_t buf_avail, buf_offset, buf_len;
uint64_t buf_addr, buf_iova;
@@ -2501,6 +2501,8 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct
vhost_virtqueue *vq,
struct virtio_net_hdr *hdr = NULL;
/* A counter to avoid desc dead loop chain */
uint16_t vec_idx = 0;
+ struct vhost_async *async = vq->async;
+ struct async_inflight_info *pkts_info;
buf_addr = buf_vec[vec_idx].buf_addr;
buf_iova = buf_vec[vec_idx].buf_iova;
@@ -2538,6 +2540,7 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct
vhost_virtqueue *vq,
if (unlikely(++vec_idx >= nr_vec))
goto error;
buf_addr = buf_vec[vec_idx].buf_addr;
+ buf_iova = buf_vec[vec_idx].buf_iova;
buf_len = buf_vec[vec_idx].buf_len;
buf_offset = 0;
@@ -2553,12 +2556,25 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct
vhost_virtqueue *vq,
mbuf_offset = 0;
mbuf_avail = m->buf_len - RTE_PKTMBUF_HEADROOM;
+
+ if (is_async) {
+ pkts_info = async->pkts_info;
+ if (async_iter_initialize(dev, async))
+ return -1;
+ }
+
while (1) {
cpy_len = RTE_MIN(buf_avail, mbuf_avail);
- sync_fill_seg(dev, vq, cur, mbuf_offset,
- buf_addr + buf_offset,
- buf_iova + buf_offset, cpy_len, false);
+ if (is_async) {
+ if (async_fill_seg(dev, vq, cur, mbuf_offset,
+ buf_iova + buf_offset, cpy_len,
false) < 0)
+ goto error;
+ } else {
+ sync_fill_seg(dev, vq, cur, mbuf_offset,
+ buf_addr + buf_offset,
+ buf_iova + buf_offset, cpy_len, false);
+ }
mbuf_avail -= cpy_len;
mbuf_offset += cpy_len;
@@ -2607,11 +2623,20 @@ copy_desc_to_mbuf(struct virtio_net *dev, struct
vhost_virtqueue *vq,
prev->data_len = mbuf_offset;
m->pkt_len += mbuf_offset;
- if (hdr)
- vhost_dequeue_offload(dev, hdr, m, legacy_ol_flags);
+ if (is_async) {
+ async_iter_finalize(async);
+ if (hdr)
+ pkts_info[slot_idx].nethdr = *hdr;
+ } else {
+ if (hdr)
+ vhost_dequeue_offload(dev, hdr, m, legacy_ol_flags);
+ }
return 0;
error:
+ if (is_async)
+ async_iter_cancel(async);
+
return -1;
}
@@ -2743,8 +2768,8 @@ virtio_dev_tx_split(struct virtio_net *dev, struct
vhost_virtqueue *vq,
break;
}
- err = copy_desc_to_mbuf(dev, vq, buf_vec, nr_vec, pkts[i],
- mbuf_pool, legacy_ol_flags);
+ err = desc_to_mbuf(dev, vq, buf_vec, nr_vec, pkts[i],
+ mbuf_pool, legacy_ol_flags, 0, false);
if (unlikely(err)) {
if (!allocerr_warned) {
VHOST_LOG_DATA(ERR, "(%s) failed to copy desc
to mbuf.\n",
@@ -2755,6 +2780,7 @@ virtio_dev_tx_split(struct virtio_net *dev, struct
vhost_virtqueue *vq,
i++;
break;
}
+
}
if (dropped)
@@ -2936,8 +2962,8 @@ vhost_dequeue_single_packed(struct virtio_net *dev,
return -1;
}
- err = copy_desc_to_mbuf(dev, vq, buf_vec, nr_vec, pkts,
- mbuf_pool, legacy_ol_flags);
+ err = desc_to_mbuf(dev, vq, buf_vec, nr_vec, pkts,
+ mbuf_pool, legacy_ol_flags, 0, false);
if (unlikely(err)) {
if (!allocerr_warned) {
VHOST_LOG_DATA(ERR, "(%s) failed to copy desc to
mbuf.\n",
--
2.17.1
