diff mbox series

[v2,01/15] vhost: move async data in a dedicated structure

Message ID 20211026162904.482987-2-maxime.coquelin@redhat.com (mailing list archive)
State Accepted, archived
Delegated to: Maxime Coquelin
Headers show
Series vhost: clean-up and simplify async implementation | expand

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Maxime Coquelin Oct. 26, 2021, 4:28 p.m. UTC
This patch moves async-related metadata from vhost_virtqueue
to a dedicated struct. It makes it clear which fields are
async related, and also saves some memory when async feature
is not in use.

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
 lib/vhost/vhost.c      | 130 +++++++++++++++++------------------------
 lib/vhost/vhost.h      |  53 ++++++++---------
 lib/vhost/vhost_user.c |   4 +-
 lib/vhost/virtio_net.c | 114 +++++++++++++++++++-----------------
 4 files changed, 142 insertions(+), 159 deletions(-)

Comments

Xia, Chenbo Oct. 28, 2021, 12:03 p.m. UTC | #1
Hi Maxime,

> -----Original Message-----
> From: Maxime Coquelin <maxime.coquelin@redhat.com>
> Sent: Wednesday, October 27, 2021 12:29 AM
> To: dev@dpdk.org; Xia, Chenbo <chenbo.xia@intel.com>; Hu, Jiayu
> <jiayu.hu@intel.com>; Wang, YuanX <yuanx.wang@intel.com>; Ma, WenwuX
> <wenwux.ma@intel.com>; Richardson, Bruce <bruce.richardson@intel.com>;
> Mcnamara, John <john.mcnamara@intel.com>
> Cc: Maxime Coquelin <maxime.coquelin@redhat.com>
> Subject: [PATCH v2 01/15] vhost: move async data in a dedicated structure
> 
> This patch moves async-related metadata from vhost_virtqueue
> to a dedicated struct. It makes it clear which fields are
> async related, and also saves some memory when async feature
> is not in use.
> 
> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> ---
>  lib/vhost/vhost.c      | 130 +++++++++++++++++------------------------
>  lib/vhost/vhost.h      |  53 ++++++++---------
>  lib/vhost/vhost_user.c |   4 +-
>  lib/vhost/virtio_net.c | 114 +++++++++++++++++++-----------------
>  4 files changed, 142 insertions(+), 159 deletions(-)
> 
> diff --git a/lib/vhost/vhost.c b/lib/vhost/vhost.c
> index 3b674ac320..452583f68d 100644
> --- a/lib/vhost/vhost.c
> +++ b/lib/vhost/vhost.c
> @@ -340,19 +340,18 @@ cleanup_device(struct virtio_net *dev, int destroy)
>  static void
>  vhost_free_async_mem(struct vhost_virtqueue *vq)
>  {
> -	rte_free(vq->async_pkts_info);
> +	if (!vq->async)
> +		return;
> 
> -	rte_free(vq->async_buffers_packed);
> -	vq->async_buffers_packed = NULL;
> -	rte_free(vq->async_descs_split);
> -	vq->async_descs_split = NULL;
> +	rte_free(vq->async->pkts_info);
> 
> -	rte_free(vq->it_pool);
> -	rte_free(vq->vec_pool);
> +	rte_free(vq->async->buffers_packed);
> +	vq->async->buffers_packed = NULL;
> +	rte_free(vq->async->descs_split);
> +	vq->async->descs_split = NULL;
> 
> -	vq->async_pkts_info = NULL;
> -	vq->it_pool = NULL;
> -	vq->vec_pool = NULL;
> +	rte_free(vq->async);
> +	vq->async = NULL;
>  }
> 
>  void
> @@ -1632,77 +1631,63 @@ async_channel_register(int vid, uint16_t queue_id,
>  {
>  	struct virtio_net *dev = get_device(vid);
>  	struct vhost_virtqueue *vq = dev->virtqueue[queue_id];
> +	struct vhost_async *async;
> +	int node = vq->numa_node;
> 
> -	if (unlikely(vq->async_registered)) {
> +	if (unlikely(vq->async)) {
>  		VHOST_LOG_CONFIG(ERR,
> -			"async register failed: channel already registered "
> -			"(vid %d, qid: %d)\n", vid, queue_id);
> +				"async register failed: already registered (vid %d,
> qid: %d)\n",

qid: %u. It’s not related to your patch and there're other 'qid: %d'. So we
can send another patch to fix all.

For this patch:

Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>
diff mbox series

Patch

diff --git a/lib/vhost/vhost.c b/lib/vhost/vhost.c
index 3b674ac320..452583f68d 100644
--- a/lib/vhost/vhost.c
+++ b/lib/vhost/vhost.c
@@ -340,19 +340,18 @@  cleanup_device(struct virtio_net *dev, int destroy)
 static void
 vhost_free_async_mem(struct vhost_virtqueue *vq)
 {
-	rte_free(vq->async_pkts_info);
+	if (!vq->async)
+		return;
 
-	rte_free(vq->async_buffers_packed);
-	vq->async_buffers_packed = NULL;
-	rte_free(vq->async_descs_split);
-	vq->async_descs_split = NULL;
+	rte_free(vq->async->pkts_info);
 
-	rte_free(vq->it_pool);
-	rte_free(vq->vec_pool);
+	rte_free(vq->async->buffers_packed);
+	vq->async->buffers_packed = NULL;
+	rte_free(vq->async->descs_split);
+	vq->async->descs_split = NULL;
 
-	vq->async_pkts_info = NULL;
-	vq->it_pool = NULL;
-	vq->vec_pool = NULL;
+	rte_free(vq->async);
+	vq->async = NULL;
 }
 
 void
@@ -1632,77 +1631,63 @@  async_channel_register(int vid, uint16_t queue_id,
 {
 	struct virtio_net *dev = get_device(vid);
 	struct vhost_virtqueue *vq = dev->virtqueue[queue_id];
+	struct vhost_async *async;
+	int node = vq->numa_node;
 
-	if (unlikely(vq->async_registered)) {
+	if (unlikely(vq->async)) {
 		VHOST_LOG_CONFIG(ERR,
-			"async register failed: channel already registered "
-			"(vid %d, qid: %d)\n", vid, queue_id);
+				"async register failed: already registered (vid %d, qid: %d)\n",
+				vid, queue_id);
 		return -1;
 	}
 
-	vq->async_pkts_info = rte_malloc_socket(NULL,
-			vq->size * sizeof(struct async_inflight_info),
-			RTE_CACHE_LINE_SIZE, vq->numa_node);
-	if (!vq->async_pkts_info) {
-		vhost_free_async_mem(vq);
-		VHOST_LOG_CONFIG(ERR,
-			"async register failed: cannot allocate memory for async_pkts_info "
-			"(vid %d, qid: %d)\n", vid, queue_id);
+	async = rte_zmalloc_socket(NULL, sizeof(struct vhost_async), 0, node);
+	if (!async) {
+		VHOST_LOG_CONFIG(ERR, "failed to allocate async metadata (vid %d, qid: %d)\n",
+				vid, queue_id);
 		return -1;
 	}
 
-	vq->it_pool = rte_malloc_socket(NULL,
-			VHOST_MAX_ASYNC_IT * sizeof(struct rte_vhost_iov_iter),
-			RTE_CACHE_LINE_SIZE, vq->numa_node);
-	if (!vq->it_pool) {
-		vhost_free_async_mem(vq);
-		VHOST_LOG_CONFIG(ERR,
-			"async register failed: cannot allocate memory for it_pool "
-			"(vid %d, qid: %d)\n", vid, queue_id);
-		return -1;
-	}
-
-	vq->vec_pool = rte_malloc_socket(NULL,
-			VHOST_MAX_ASYNC_VEC * sizeof(struct iovec),
-			RTE_CACHE_LINE_SIZE, vq->numa_node);
-	if (!vq->vec_pool) {
-		vhost_free_async_mem(vq);
-		VHOST_LOG_CONFIG(ERR,
-			"async register failed: cannot allocate memory for vec_pool "
-			"(vid %d, qid: %d)\n", vid, queue_id);
-		return -1;
+	async->pkts_info = rte_malloc_socket(NULL, vq->size * sizeof(struct async_inflight_info),
+			RTE_CACHE_LINE_SIZE, node);
+	if (!async->pkts_info) {
+		VHOST_LOG_CONFIG(ERR, "failed to allocate async_pkts_info (vid %d, qid: %d)\n",
+				vid, queue_id);
+		goto out_free_async;
 	}
 
 	if (vq_is_packed(dev)) {
-		vq->async_buffers_packed = rte_malloc_socket(NULL,
-			vq->size * sizeof(struct vring_used_elem_packed),
-			RTE_CACHE_LINE_SIZE, vq->numa_node);
-		if (!vq->async_buffers_packed) {
-			vhost_free_async_mem(vq);
-			VHOST_LOG_CONFIG(ERR,
-				"async register failed: cannot allocate memory for async buffers "
-				"(vid %d, qid: %d)\n", vid, queue_id);
-			return -1;
+		async->buffers_packed = rte_malloc_socket(NULL,
+				vq->size * sizeof(struct vring_used_elem_packed),
+				RTE_CACHE_LINE_SIZE, node);
+		if (!async->buffers_packed) {
+			VHOST_LOG_CONFIG(ERR, "failed to allocate async buffers (vid %d, qid: %d)\n",
+					vid, queue_id);
+			goto out_free_inflight;
 		}
 	} else {
-		vq->async_descs_split = rte_malloc_socket(NULL,
-			vq->size * sizeof(struct vring_used_elem),
-			RTE_CACHE_LINE_SIZE, vq->numa_node);
-		if (!vq->async_descs_split) {
-			vhost_free_async_mem(vq);
-			VHOST_LOG_CONFIG(ERR,
-				"async register failed: cannot allocate memory for async descs "
-				"(vid %d, qid: %d)\n", vid, queue_id);
-			return -1;
+		async->descs_split = rte_malloc_socket(NULL,
+				vq->size * sizeof(struct vring_used_elem),
+				RTE_CACHE_LINE_SIZE, node);
+		if (!async->descs_split) {
+			VHOST_LOG_CONFIG(ERR, "failed to allocate async descs (vid %d, qid: %d)\n",
+					vid, queue_id);
+			goto out_free_inflight;
 		}
 	}
 
-	vq->async_ops.check_completed_copies = ops->check_completed_copies;
-	vq->async_ops.transfer_data = ops->transfer_data;
+	async->ops.check_completed_copies = ops->check_completed_copies;
+	async->ops.transfer_data = ops->transfer_data;
 
-	vq->async_registered = true;
+	vq->async = async;
 
 	return 0;
+out_free_inflight:
+	rte_free(async->pkts_info);
+out_free_async:
+	rte_free(async);
+
+	return -1;
 }
 
 int
@@ -1796,7 +1781,7 @@  rte_vhost_async_channel_unregister(int vid, uint16_t queue_id)
 
 	ret = 0;
 
-	if (!vq->async_registered)
+	if (!vq->async)
 		return ret;
 
 	if (!rte_spinlock_trylock(&vq->access_lock)) {
@@ -1805,7 +1790,7 @@  rte_vhost_async_channel_unregister(int vid, uint16_t queue_id)
 		return -1;
 	}
 
-	if (vq->async_pkts_inflight_n) {
+	if (vq->async->pkts_inflight_n) {
 		VHOST_LOG_CONFIG(ERR, "Failed to unregister async channel. "
 			"async inflight packets must be completed before unregistration.\n");
 		ret = -1;
@@ -1813,11 +1798,6 @@  rte_vhost_async_channel_unregister(int vid, uint16_t queue_id)
 	}
 
 	vhost_free_async_mem(vq);
-
-	vq->async_ops.transfer_data = NULL;
-	vq->async_ops.check_completed_copies = NULL;
-	vq->async_registered = false;
-
 out:
 	rte_spinlock_unlock(&vq->access_lock);
 
@@ -1841,10 +1821,10 @@  rte_vhost_async_channel_unregister_thread_unsafe(int vid, uint16_t queue_id)
 	if (vq == NULL)
 		return -1;
 
-	if (!vq->async_registered)
+	if (!vq->async)
 		return 0;
 
-	if (vq->async_pkts_inflight_n) {
+	if (vq->async->pkts_inflight_n) {
 		VHOST_LOG_CONFIG(ERR, "Failed to unregister async channel. "
 			"async inflight packets must be completed before unregistration.\n");
 		return -1;
@@ -1852,10 +1832,6 @@  rte_vhost_async_channel_unregister_thread_unsafe(int vid, uint16_t queue_id)
 
 	vhost_free_async_mem(vq);
 
-	vq->async_ops.transfer_data = NULL;
-	vq->async_ops.check_completed_copies = NULL;
-	vq->async_registered = false;
-
 	return 0;
 }
 
@@ -1877,7 +1853,7 @@  rte_vhost_async_get_inflight(int vid, uint16_t queue_id)
 	if (vq == NULL)
 		return ret;
 
-	if (!vq->async_registered)
+	if (!vq->async)
 		return ret;
 
 	if (!rte_spinlock_trylock(&vq->access_lock)) {
@@ -1886,7 +1862,7 @@  rte_vhost_async_get_inflight(int vid, uint16_t queue_id)
 		return ret;
 	}
 
-	ret = vq->async_pkts_inflight_n;
+	ret = vq->async->pkts_inflight_n;
 	rte_spinlock_unlock(&vq->access_lock);
 
 	return ret;
diff --git a/lib/vhost/vhost.h b/lib/vhost/vhost.h
index 6c6a2da2c9..a556d61063 100644
--- a/lib/vhost/vhost.h
+++ b/lib/vhost/vhost.h
@@ -119,6 +119,32 @@  struct vring_used_elem_packed {
 	uint32_t count;
 };
 
+struct vhost_async {
+	/* operation callbacks for DMA */
+	struct rte_vhost_async_channel_ops ops;
+
+	struct rte_vhost_iov_iter it_pool[VHOST_MAX_ASYNC_IT];
+	struct iovec vec_pool[VHOST_MAX_ASYNC_VEC];
+
+	/* data transfer status */
+	struct async_inflight_info *pkts_info;
+	uint16_t pkts_idx;
+	uint16_t pkts_inflight_n;
+	uint16_t last_pkts_n;
+	union {
+		struct vring_used_elem  *descs_split;
+		struct vring_used_elem_packed *buffers_packed;
+	};
+	union {
+		uint16_t desc_idx_split;
+		uint16_t buffer_idx_packed;
+	};
+	union {
+		uint16_t last_desc_idx_split;
+		uint16_t last_buffer_idx_packed;
+	};
+};
+
 /**
  * Structure contains variables relevant to RX/TX virtqueues.
  */
@@ -193,32 +219,7 @@  struct vhost_virtqueue {
 	struct rte_vhost_resubmit_info *resubmit_inflight;
 	uint64_t		global_counter;
 
-	/* operation callbacks for async dma */
-	struct rte_vhost_async_channel_ops	async_ops;
-
-	struct rte_vhost_iov_iter *it_pool;
-	struct iovec *vec_pool;
-
-	/* async data transfer status */
-	struct async_inflight_info *async_pkts_info;
-	uint16_t	async_pkts_idx;
-	uint16_t	async_pkts_inflight_n;
-	uint16_t	async_last_pkts_n;
-	union {
-		struct vring_used_elem  *async_descs_split;
-		struct vring_used_elem_packed *async_buffers_packed;
-	};
-	union {
-		uint16_t async_desc_idx_split;
-		uint16_t async_buffer_idx_packed;
-	};
-	union {
-		uint16_t last_async_desc_idx_split;
-		uint16_t last_async_buffer_idx_packed;
-	};
-
-	/* vq async features */
-	bool		async_registered;
+	struct vhost_async	*async;
 
 	int			notif_enable;
 #define VIRTIO_UNINITIALIZED_NOTIF	(-1)
diff --git a/lib/vhost/vhost_user.c b/lib/vhost/vhost_user.c
index 720d1c1c9d..0bc23c8ae2 100644
--- a/lib/vhost/vhost_user.c
+++ b/lib/vhost/vhost_user.c
@@ -2252,8 +2252,8 @@  vhost_user_set_vring_enable(struct virtio_net **pdev,
 		"set queue enable: %d to qp idx: %d\n",
 		enable, index);
 
-	if (enable && dev->virtqueue[index]->async_registered) {
-		if (dev->virtqueue[index]->async_pkts_inflight_n) {
+	if (enable && dev->virtqueue[index]->async) {
+		if (dev->virtqueue[index]->async->pkts_inflight_n) {
 			VHOST_LOG_CONFIG(ERR, "failed to enable vring. "
 			"async inflight packets must be completed first\n");
 			return RTE_VHOST_MSG_RESULT_ERR;
diff --git a/lib/vhost/virtio_net.c b/lib/vhost/virtio_net.c
index b6140a643b..d9ac85f829 100644
--- a/lib/vhost/virtio_net.c
+++ b/lib/vhost/virtio_net.c
@@ -1510,12 +1510,13 @@  virtio_dev_rx_async_submit_split(struct virtio_net *dev,
 	uint16_t num_buffers;
 	uint16_t avail_head;
 
-	struct rte_vhost_iov_iter *it_pool = vq->it_pool;
-	struct iovec *vec_pool = vq->vec_pool;
+	struct vhost_async *async = vq->async;
+	struct rte_vhost_iov_iter *it_pool = async->it_pool;
+	struct iovec *vec_pool = async->vec_pool;
 	struct rte_vhost_async_desc tdes[MAX_PKT_BURST];
 	struct iovec *src_iovec = vec_pool;
 	struct iovec *dst_iovec = vec_pool + (VHOST_MAX_ASYNC_VEC >> 1);
-	struct async_inflight_info *pkts_info = vq->async_pkts_info;
+	struct async_inflight_info *pkts_info = async->pkts_info;
 	uint32_t n_pkts = 0, pkt_err = 0;
 	int32_t n_xfer;
 	uint16_t segs_await = 0;
@@ -1556,7 +1557,7 @@  virtio_dev_rx_async_submit_split(struct virtio_net *dev,
 		async_fill_desc(&tdes[pkt_burst_idx++], &it_pool[it_idx],
 				&it_pool[it_idx + 1]);
 
-		slot_idx = (vq->async_pkts_idx + pkt_idx) & (vq->size - 1);
+		slot_idx = (async->pkts_idx + pkt_idx) & (vq->size - 1);
 		pkts_info[slot_idx].descs = num_buffers;
 		pkts_info[slot_idx].mbuf = pkts[pkt_idx];
 
@@ -1574,7 +1575,7 @@  virtio_dev_rx_async_submit_split(struct virtio_net *dev,
 		if (unlikely(pkt_burst_idx >= VHOST_ASYNC_BATCH_THRESHOLD ||
 			((VHOST_MAX_ASYNC_VEC >> 1) - segs_await <
 			BUF_VECTOR_MAX))) {
-			n_xfer = vq->async_ops.transfer_data(dev->vid,
+			n_xfer = async->ops.transfer_data(dev->vid,
 					queue_id, tdes, 0, pkt_burst_idx);
 			if (likely(n_xfer >= 0)) {
 				n_pkts = n_xfer;
@@ -1606,7 +1607,7 @@  virtio_dev_rx_async_submit_split(struct virtio_net *dev,
 	}
 
 	if (pkt_burst_idx) {
-		n_xfer = vq->async_ops.transfer_data(dev->vid, queue_id, tdes, 0, pkt_burst_idx);
+		n_xfer = async->ops.transfer_data(dev->vid, queue_id, tdes, 0, pkt_burst_idx);
 		if (likely(n_xfer >= 0)) {
 			n_pkts = n_xfer;
 		} else {
@@ -1638,15 +1639,15 @@  virtio_dev_rx_async_submit_split(struct virtio_net *dev,
 
 	/* keep used descriptors */
 	if (likely(vq->shadow_used_idx)) {
-		uint16_t to = vq->async_desc_idx_split & (vq->size - 1);
+		uint16_t to = async->desc_idx_split & (vq->size - 1);
 
 		store_dma_desc_info_split(vq->shadow_used_split,
-				vq->async_descs_split, vq->size, 0, to,
+				async->descs_split, vq->size, 0, to,
 				vq->shadow_used_idx);
 
-		vq->async_desc_idx_split += vq->shadow_used_idx;
-		vq->async_pkts_idx += pkt_idx;
-		vq->async_pkts_inflight_n += pkt_idx;
+		async->desc_idx_split += vq->shadow_used_idx;
+		async->pkts_idx += pkt_idx;
+		async->pkts_inflight_n += pkt_idx;
 		vq->shadow_used_idx = 0;
 	}
 
@@ -1798,7 +1799,7 @@  dma_error_handler_packed(struct vhost_virtqueue *vq, uint16_t slot_idx,
 {
 	uint16_t descs_err = 0;
 	uint16_t buffers_err = 0;
-	struct async_inflight_info *pkts_info = vq->async_pkts_info;
+	struct async_inflight_info *pkts_info = vq->async->pkts_info;
 
 	*pkt_idx -= nr_err;
 	/* calculate the sum of buffers and descs of DMA-error packets. */
@@ -1829,12 +1830,13 @@  virtio_dev_rx_async_submit_packed(struct virtio_net *dev,
 	uint16_t num_buffers;
 	uint16_t num_descs;
 
-	struct rte_vhost_iov_iter *it_pool = vq->it_pool;
-	struct iovec *vec_pool = vq->vec_pool;
+	struct vhost_async *async = vq->async;
+	struct rte_vhost_iov_iter *it_pool = async->it_pool;
+	struct iovec *vec_pool = async->vec_pool;
 	struct rte_vhost_async_desc tdes[MAX_PKT_BURST];
 	struct iovec *src_iovec = vec_pool;
 	struct iovec *dst_iovec = vec_pool + (VHOST_MAX_ASYNC_VEC >> 1);
-	struct async_inflight_info *pkts_info = vq->async_pkts_info;
+	struct async_inflight_info *pkts_info = async->pkts_info;
 	uint32_t n_pkts = 0, pkt_err = 0;
 	uint16_t slot_idx = 0;
 	uint16_t segs_await = 0;
@@ -1851,7 +1853,7 @@  virtio_dev_rx_async_submit_packed(struct virtio_net *dev,
 						&it_pool[it_idx], &it_pool[it_idx + 1]) < 0))
 			break;
 
-		slot_idx = (vq->async_pkts_idx + pkt_idx) % vq->size;
+		slot_idx = (async->pkts_idx + pkt_idx) % vq->size;
 
 		async_fill_desc(&tdes[pkt_burst_idx++], &it_pool[it_idx],
 				&it_pool[it_idx + 1]);
@@ -1873,7 +1875,7 @@  virtio_dev_rx_async_submit_packed(struct virtio_net *dev,
 		 */
 		if (unlikely(pkt_burst_idx >= VHOST_ASYNC_BATCH_THRESHOLD ||
 			((VHOST_MAX_ASYNC_VEC >> 1) - segs_await < BUF_VECTOR_MAX))) {
-			n_xfer = vq->async_ops.transfer_data(dev->vid,
+			n_xfer = async->ops.transfer_data(dev->vid,
 					queue_id, tdes, 0, pkt_burst_idx);
 			if (likely(n_xfer >= 0)) {
 				n_pkts = n_xfer;
@@ -1904,7 +1906,7 @@  virtio_dev_rx_async_submit_packed(struct virtio_net *dev,
 	} while (pkt_idx < count);
 
 	if (pkt_burst_idx) {
-		n_xfer = vq->async_ops.transfer_data(dev->vid, queue_id, tdes, 0, pkt_burst_idx);
+		n_xfer = async->ops.transfer_data(dev->vid, queue_id, tdes, 0, pkt_burst_idx);
 		if (likely(n_xfer >= 0)) {
 			n_pkts = n_xfer;
 		} else {
@@ -1922,20 +1924,20 @@  virtio_dev_rx_async_submit_packed(struct virtio_net *dev,
 
 	if (likely(vq->shadow_used_idx)) {
 		/* keep used descriptors. */
-		store_dma_desc_info_packed(vq->shadow_used_packed, vq->async_buffers_packed,
-					vq->size, 0, vq->async_buffer_idx_packed,
+		store_dma_desc_info_packed(vq->shadow_used_packed, async->buffers_packed,
+					vq->size, 0, async->buffer_idx_packed,
 					vq->shadow_used_idx);
 
-		vq->async_buffer_idx_packed += vq->shadow_used_idx;
-		if (vq->async_buffer_idx_packed >= vq->size)
-			vq->async_buffer_idx_packed -= vq->size;
+		async->buffer_idx_packed += vq->shadow_used_idx;
+		if (async->buffer_idx_packed >= vq->size)
+			async->buffer_idx_packed -= vq->size;
 
-		vq->async_pkts_idx += pkt_idx;
-		if (vq->async_pkts_idx >= vq->size)
-			vq->async_pkts_idx -= vq->size;
+		async->pkts_idx += pkt_idx;
+		if (async->pkts_idx >= vq->size)
+			async->pkts_idx -= vq->size;
 
 		vq->shadow_used_idx = 0;
-		vq->async_pkts_inflight_n += pkt_idx;
+		async->pkts_inflight_n += pkt_idx;
 	}
 
 	return pkt_idx;
@@ -1944,28 +1946,29 @@  virtio_dev_rx_async_submit_packed(struct virtio_net *dev,
 static __rte_always_inline void
 write_back_completed_descs_split(struct vhost_virtqueue *vq, uint16_t n_descs)
 {
+	struct vhost_async *async = vq->async;
 	uint16_t nr_left = n_descs;
 	uint16_t nr_copy;
 	uint16_t to, from;
 
 	do {
-		from = vq->last_async_desc_idx_split & (vq->size - 1);
+		from = async->last_desc_idx_split & (vq->size - 1);
 		nr_copy = nr_left + from <= vq->size ? nr_left : vq->size - from;
 		to = vq->last_used_idx & (vq->size - 1);
 
 		if (to + nr_copy <= vq->size) {
-			rte_memcpy(&vq->used->ring[to], &vq->async_descs_split[from],
+			rte_memcpy(&vq->used->ring[to], &async->descs_split[from],
 					nr_copy * sizeof(struct vring_used_elem));
 		} else {
 			uint16_t size = vq->size - to;
 
-			rte_memcpy(&vq->used->ring[to], &vq->async_descs_split[from],
+			rte_memcpy(&vq->used->ring[to], &async->descs_split[from],
 					size * sizeof(struct vring_used_elem));
-			rte_memcpy(&vq->used->ring[0], &vq->async_descs_split[from + size],
+			rte_memcpy(&vq->used->ring[0], &async->descs_split[from + size],
 					(nr_copy - size) * sizeof(struct vring_used_elem));
 		}
 
-		vq->last_async_desc_idx_split += nr_copy;
+		async->last_desc_idx_split += nr_copy;
 		vq->last_used_idx += nr_copy;
 		nr_left -= nr_copy;
 	} while (nr_left > 0);
@@ -1975,20 +1978,21 @@  static __rte_always_inline void
 write_back_completed_descs_packed(struct vhost_virtqueue *vq,
 				uint16_t n_buffers)
 {
+	struct vhost_async *async = vq->async;
 	uint16_t nr_left = n_buffers;
 	uint16_t from, to;
 
 	do {
-		from = vq->last_async_buffer_idx_packed;
+		from = async->last_buffer_idx_packed;
 		to = (from + nr_left) % vq->size;
 		if (to > from) {
-			vhost_update_used_packed(vq, vq->async_buffers_packed + from, to - from);
-			vq->last_async_buffer_idx_packed += nr_left;
+			vhost_update_used_packed(vq, async->buffers_packed + from, to - from);
+			async->last_buffer_idx_packed += nr_left;
 			nr_left = 0;
 		} else {
-			vhost_update_used_packed(vq, vq->async_buffers_packed + from,
+			vhost_update_used_packed(vq, async->buffers_packed + from,
 				vq->size - from);
-			vq->last_async_buffer_idx_packed = 0;
+			async->last_buffer_idx_packed = 0;
 			nr_left -= vq->size - from;
 		}
 	} while (nr_left > 0);
@@ -1999,6 +2003,7 @@  vhost_poll_enqueue_completed(struct virtio_net *dev, uint16_t queue_id,
 		struct rte_mbuf **pkts, uint16_t count)
 {
 	struct vhost_virtqueue *vq;
+	struct vhost_async *async;
 	struct async_inflight_info *pkts_info;
 	int32_t n_cpl;
 	uint16_t n_pkts_cpl = 0, n_pkts_put = 0, n_descs = 0, n_buffers = 0;
@@ -2006,15 +2011,16 @@  vhost_poll_enqueue_completed(struct virtio_net *dev, uint16_t queue_id,
 	uint16_t from, i;
 
 	vq = dev->virtqueue[queue_id];
-	pkts_idx = vq->async_pkts_idx % vq->size;
-	pkts_info = vq->async_pkts_info;
+	async = vq->async;
+	pkts_idx = async->pkts_idx % vq->size;
+	pkts_info = async->pkts_info;
 	vq_size = vq->size;
 	start_idx = virtio_dev_rx_async_get_info_idx(pkts_idx,
-		vq_size, vq->async_pkts_inflight_n);
+		vq_size, async->pkts_inflight_n);
 
-	if (count > vq->async_last_pkts_n) {
-		n_cpl = vq->async_ops.check_completed_copies(dev->vid,
-			queue_id, 0, count - vq->async_last_pkts_n);
+	if (count > async->last_pkts_n) {
+		n_cpl = async->ops.check_completed_copies(dev->vid,
+			queue_id, 0, count - async->last_pkts_n);
 		if (likely(n_cpl >= 0)) {
 			n_pkts_cpl = n_cpl;
 		} else {
@@ -2025,10 +2031,10 @@  vhost_poll_enqueue_completed(struct virtio_net *dev, uint16_t queue_id,
 		}
 	}
 
-	n_pkts_cpl += vq->async_last_pkts_n;
+	n_pkts_cpl += async->last_pkts_n;
 	n_pkts_put = RTE_MIN(n_pkts_cpl, count);
 	if (unlikely(n_pkts_put == 0)) {
-		vq->async_last_pkts_n = n_pkts_cpl;
+		async->last_pkts_n = n_pkts_cpl;
 		return 0;
 	}
 
@@ -2045,8 +2051,8 @@  vhost_poll_enqueue_completed(struct virtio_net *dev, uint16_t queue_id,
 			pkts[i] = pkts_info[from].mbuf;
 		}
 	}
-	vq->async_last_pkts_n = n_pkts_cpl - n_pkts_put;
-	vq->async_pkts_inflight_n -= n_pkts_put;
+	async->last_pkts_n = n_pkts_cpl - n_pkts_put;
+	async->pkts_inflight_n -= n_pkts_put;
 
 	if (likely(vq->enabled && vq->access_ok)) {
 		if (vq_is_packed(dev)) {
@@ -2062,11 +2068,11 @@  vhost_poll_enqueue_completed(struct virtio_net *dev, uint16_t queue_id,
 		}
 	} else {
 		if (vq_is_packed(dev)) {
-			vq->last_async_buffer_idx_packed += n_buffers;
-			if (vq->last_async_buffer_idx_packed >= vq->size)
-				vq->last_async_buffer_idx_packed -= vq->size;
+			async->last_buffer_idx_packed += n_buffers;
+			if (async->last_buffer_idx_packed >= vq->size)
+				async->last_buffer_idx_packed -= vq->size;
 		} else {
-			vq->last_async_desc_idx_split += n_descs;
+			async->last_desc_idx_split += n_descs;
 		}
 	}
 
@@ -2093,7 +2099,7 @@  rte_vhost_poll_enqueue_completed(int vid, uint16_t queue_id,
 
 	vq = dev->virtqueue[queue_id];
 
-	if (unlikely(!vq->async_registered)) {
+	if (unlikely(!vq->async)) {
 		VHOST_LOG_DATA(ERR, "(%d) %s: async not registered for queue id %d.\n",
 			dev->vid, __func__, queue_id);
 		return 0;
@@ -2128,7 +2134,7 @@  rte_vhost_clear_queue_thread_unsafe(int vid, uint16_t queue_id,
 
 	vq = dev->virtqueue[queue_id];
 
-	if (unlikely(!vq->async_registered)) {
+	if (unlikely(!vq->async)) {
 		VHOST_LOG_DATA(ERR, "(%d) %s: async not registered for queue id %d.\n",
 			dev->vid, __func__, queue_id);
 		return 0;
@@ -2157,7 +2163,7 @@  virtio_dev_rx_async_submit(struct virtio_net *dev, uint16_t queue_id,
 
 	rte_spinlock_lock(&vq->access_lock);
 
-	if (unlikely(!vq->enabled || !vq->async_registered))
+	if (unlikely(!vq->enabled || !vq->async))
 		goto out_access_unlock;
 
 	if (dev->features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))