[dpdk-dev] vhost: support rx_queue_count
Checks
Commit Message
This patch implements the ops rx_queue_count for vhost PMD by adding
a helper function rte_vhost_rx_queue_count in vhost lib.
The ops ops rx_queue_count gets vhost RX queue avail count and helps
to understand the queue fill level.
Signed-off-by: Zhihong Wang <zhihong.wang@intel.com>
---
drivers/net/vhost/rte_eth_vhost.c | 13 +++++++++++++
lib/librte_vhost/rte_vhost.h | 12 ++++++++++++
lib/librte_vhost/rte_vhost_version.map | 7 +++++++
lib/librte_vhost/vhost.c | 23 +++++++++++++++++++++++
4 files changed, 55 insertions(+)
Comments
On Mon, May 22, 2017 at 04:01:08PM -0400, Zhihong Wang wrote:
> This patch implements the ops rx_queue_count for vhost PMD by adding
> a helper function rte_vhost_rx_queue_count in vhost lib.
>
> The ops ops rx_queue_count gets vhost RX queue avail count and helps
s/ops ops/ops/ ?
> to understand the queue fill level.
>
> Signed-off-by: Zhihong Wang <zhihong.wang@intel.com>
> ---
> drivers/net/vhost/rte_eth_vhost.c | 13 +++++++++++++
> lib/librte_vhost/rte_vhost.h | 12 ++++++++++++
> lib/librte_vhost/rte_vhost_version.map | 7 +++++++
> lib/librte_vhost/vhost.c | 23 +++++++++++++++++++++++
> 4 files changed, 55 insertions(+)
>
> diff --git a/drivers/net/vhost/rte_eth_vhost.c b/drivers/net/vhost/rte_eth_vhost.c
> index 257bf6d..e3a3fe0 100644
> --- a/drivers/net/vhost/rte_eth_vhost.c
> +++ b/drivers/net/vhost/rte_eth_vhost.c
> @@ -973,6 +973,18 @@ eth_link_update(struct rte_eth_dev *dev __rte_unused,
> return 0;
> }
>
> +static uint32_t
> +eth_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id)
> +{
> + struct vhost_queue *vq;
> +
> + vq = dev->data->rx_queues[rx_queue_id];
> + if (!vq)
nitpick, but it should be "if (vq == NULL" according to the coding style guide
> + return 0;
> +
> + return rte_vhost_rx_queue_count(vq->vid, vq->virtqueue_id);
> +}
> +
> static const struct eth_dev_ops ops = {
> .dev_start = eth_dev_start,
> .dev_stop = eth_dev_stop,
> @@ -984,6 +996,7 @@ static const struct eth_dev_ops ops = {
> .rx_queue_release = eth_queue_release,
> .tx_queue_release = eth_queue_release,
> .tx_done_cleanup = eth_tx_done_cleanup,
> + .rx_queue_count = eth_rx_queue_count,
> .link_update = eth_link_update,
> .stats_get = eth_stats_get,
> .stats_reset = eth_stats_reset,
> diff --git a/lib/librte_vhost/rte_vhost.h b/lib/librte_vhost/rte_vhost.h
> index 605e47c..f64ed20 100644
> --- a/lib/librte_vhost/rte_vhost.h
> +++ b/lib/librte_vhost/rte_vhost.h
> @@ -432,6 +432,18 @@ int rte_vhost_get_mem_table(int vid, struct rte_vhost_memory **mem);
> int rte_vhost_get_vhost_vring(int vid, uint16_t vring_idx,
> struct rte_vhost_vring *vring);
>
> +/**
> + * Get vhost RX queue avail count.
> + *
> + * @param vid
> + * vhost device ID
> + * @param qid
> + * virtio queue index in mq case
> + * @return
> + * num of desc available
> + */
> +uint32_t rte_vhost_rx_queue_count(int vid, uint16_t qid);
> +
> #ifdef __cplusplus
> }
> #endif
> diff --git a/lib/librte_vhost/rte_vhost_version.map b/lib/librte_vhost/rte_vhost_version.map
> index 0785873..1e70495 100644
> --- a/lib/librte_vhost/rte_vhost_version.map
> +++ b/lib/librte_vhost/rte_vhost_version.map
> @@ -45,3 +45,10 @@ DPDK_17.05 {
> rte_vhost_log_write;
>
> } DPDK_16.07;
> +
> +DPDK_17.08 {
> + global:
> +
> + rte_vhost_rx_queue_count;
> +
> +} DPDK_17.05;
> diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c
> index 0b19d2e..140d2ae 100644
> --- a/lib/librte_vhost/vhost.c
> +++ b/lib/librte_vhost/vhost.c
> @@ -475,3 +475,26 @@ rte_vhost_log_used_vring(int vid, uint16_t vring_idx,
>
> vhost_log_used_vring(dev, vq, offset, len);
> }
> +
> +uint32_t
> +rte_vhost_rx_queue_count(int vid, uint16_t qid)
> +{
> + struct virtio_net *dev;
> + struct vhost_virtqueue *vq;
> +
> + dev = get_device(vid);
> + if (!dev)
same here
> + return 0;
> +
> + if (unlikely(qid >= dev->nr_vring || (qid & 1) == 0)) {
> + RTE_LOG(ERR, VHOST_DATA, "(%d) %s: invalid virtqueue idx %d.\n",
> + dev->vid, __func__, qid);
> + return 0;
> + }
> +
> + vq = dev->virtqueue[qid];
check for vq == NULL?
regards,
Jens
> -----Original Message-----
> From: Jens Freimann [mailto:jfreiman@redhat.com]
> Sent: Tuesday, May 23, 2017 7:54 PM
> To: Wang, Zhihong <zhihong.wang@intel.com>
> Cc: dev@dpdk.org; yuanhan.liu@linux.intel.com
> Subject: Re: [dpdk-dev] [PATCH] vhost: support rx_queue_count
>
> On Mon, May 22, 2017 at 04:01:08PM -0400, Zhihong Wang wrote:
> > This patch implements the ops rx_queue_count for vhost PMD by adding
> > a helper function rte_vhost_rx_queue_count in vhost lib.
> >
> > The ops ops rx_queue_count gets vhost RX queue avail count and helps
>
> s/ops ops/ops/ ?
Thanks a lot!
>
> > to understand the queue fill level.
> >
> > Signed-off-by: Zhihong Wang <zhihong.wang@intel.com>
> > ---
> > drivers/net/vhost/rte_eth_vhost.c | 13 +++++++++++++
> > lib/librte_vhost/rte_vhost.h | 12 ++++++++++++
> > lib/librte_vhost/rte_vhost_version.map | 7 +++++++
> > lib/librte_vhost/vhost.c | 23 +++++++++++++++++++++++
> > 4 files changed, 55 insertions(+)
> >
> > diff --git a/drivers/net/vhost/rte_eth_vhost.c
> b/drivers/net/vhost/rte_eth_vhost.c
> > index 257bf6d..e3a3fe0 100644
> > --- a/drivers/net/vhost/rte_eth_vhost.c
> > +++ b/drivers/net/vhost/rte_eth_vhost.c
> > @@ -973,6 +973,18 @@ eth_link_update(struct rte_eth_dev *dev
> __rte_unused,
> > return 0;
> > }
> >
> > +static uint32_t
> > +eth_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id)
> > +{
> > + struct vhost_queue *vq;
> > +
> > + vq = dev->data->rx_queues[rx_queue_id];
> > + if (!vq)
>
> nitpick, but it should be "if (vq == NULL" according to the coding style guide
>
> > + return 0;
> > +
> > + return rte_vhost_rx_queue_count(vq->vid, vq->virtqueue_id);
> > +}
> > +
> > static const struct eth_dev_ops ops = {
> > .dev_start = eth_dev_start,
> > .dev_stop = eth_dev_stop,
> > @@ -984,6 +996,7 @@ static const struct eth_dev_ops ops = {
> > .rx_queue_release = eth_queue_release,
> > .tx_queue_release = eth_queue_release,
> > .tx_done_cleanup = eth_tx_done_cleanup,
> > + .rx_queue_count = eth_rx_queue_count,
> > .link_update = eth_link_update,
> > .stats_get = eth_stats_get,
> > .stats_reset = eth_stats_reset,
> > diff --git a/lib/librte_vhost/rte_vhost.h b/lib/librte_vhost/rte_vhost.h
> > index 605e47c..f64ed20 100644
> > --- a/lib/librte_vhost/rte_vhost.h
> > +++ b/lib/librte_vhost/rte_vhost.h
> > @@ -432,6 +432,18 @@ int rte_vhost_get_mem_table(int vid, struct
> rte_vhost_memory **mem);
> > int rte_vhost_get_vhost_vring(int vid, uint16_t vring_idx,
> > struct rte_vhost_vring *vring);
> >
> > +/**
> > + * Get vhost RX queue avail count.
> > + *
> > + * @param vid
> > + * vhost device ID
> > + * @param qid
> > + * virtio queue index in mq case
> > + * @return
> > + * num of desc available
> > + */
> > +uint32_t rte_vhost_rx_queue_count(int vid, uint16_t qid);
> > +
> > #ifdef __cplusplus
> > }
> > #endif
> > diff --git a/lib/librte_vhost/rte_vhost_version.map
> b/lib/librte_vhost/rte_vhost_version.map
> > index 0785873..1e70495 100644
> > --- a/lib/librte_vhost/rte_vhost_version.map
> > +++ b/lib/librte_vhost/rte_vhost_version.map
> > @@ -45,3 +45,10 @@ DPDK_17.05 {
> > rte_vhost_log_write;
> >
> > } DPDK_16.07;
> > +
> > +DPDK_17.08 {
> > + global:
> > +
> > + rte_vhost_rx_queue_count;
> > +
> > +} DPDK_17.05;
> > diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c
> > index 0b19d2e..140d2ae 100644
> > --- a/lib/librte_vhost/vhost.c
> > +++ b/lib/librte_vhost/vhost.c
> > @@ -475,3 +475,26 @@ rte_vhost_log_used_vring(int vid, uint16_t
> vring_idx,
> >
> > vhost_log_used_vring(dev, vq, offset, len);
> > }
> > +
> > +uint32_t
> > +rte_vhost_rx_queue_count(int vid, uint16_t qid)
> > +{
> > + struct virtio_net *dev;
> > + struct vhost_virtqueue *vq;
> > +
> > + dev = get_device(vid);
> > + if (!dev)
>
> same here
>
> > + return 0;
> > +
> > + if (unlikely(qid >= dev->nr_vring || (qid & 1) == 0)) {
> > + RTE_LOG(ERR, VHOST_DATA, "(%d) %s: invalid virtqueue
> idx %d.\n",
> > + dev->vid, __func__, qid);
> > + return 0;
> > + }
> > +
> > + vq = dev->virtqueue[qid];
>
> check for vq == NULL?
>
> regards,
> Jens
>
> This patch implements the ops rx_queue_count for vhost PMD by adding
> a helper function rte_vhost_rx_queue_count in vhost lib.
>
> The ops ops rx_queue_count gets vhost RX queue avail count and helps
> to understand the queue fill level.
>
> Signed-off-by: Zhihong Wang <zhihong.wang@intel.com>
> ---
> drivers/net/vhost/rte_eth_vhost.c | 13 +++++++++++++
> lib/librte_vhost/rte_vhost.h | 12 ++++++++++++
> lib/librte_vhost/rte_vhost_version.map | 7 +++++++
> lib/librte_vhost/vhost.c | 23 +++++++++++++++++++++++
> 4 files changed, 55 insertions(+)
>
> diff --git a/drivers/net/vhost/rte_eth_vhost.c
> b/drivers/net/vhost/rte_eth_vhost.c
> index 257bf6d..e3a3fe0 100644
> --- a/drivers/net/vhost/rte_eth_vhost.c
> +++ b/drivers/net/vhost/rte_eth_vhost.c
> @@ -973,6 +973,18 @@ eth_link_update(struct rte_eth_dev *dev
> __rte_unused,
> return 0;
> }
>
> +static uint32_t
> +eth_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id)
> +{
> + struct vhost_queue *vq;
> +
> + vq = dev->data->rx_queues[rx_queue_id];
> + if (!vq)
> + return 0;
> +
> + return rte_vhost_rx_queue_count(vq->vid, vq->virtqueue_id);
> +}
> +
> static const struct eth_dev_ops ops = {
> .dev_start = eth_dev_start,
> .dev_stop = eth_dev_stop,
> @@ -984,6 +996,7 @@ static const struct eth_dev_ops ops = {
> .rx_queue_release = eth_queue_release,
> .tx_queue_release = eth_queue_release,
> .tx_done_cleanup = eth_tx_done_cleanup,
> + .rx_queue_count = eth_rx_queue_count,
> .link_update = eth_link_update,
> .stats_get = eth_stats_get,
> .stats_reset = eth_stats_reset,
> diff --git a/lib/librte_vhost/rte_vhost.h b/lib/librte_vhost/rte_vhost.h
> index 605e47c..f64ed20 100644
> --- a/lib/librte_vhost/rte_vhost.h
> +++ b/lib/librte_vhost/rte_vhost.h
> @@ -432,6 +432,18 @@ int rte_vhost_get_mem_table(int vid, struct
> rte_vhost_memory **mem);
> int rte_vhost_get_vhost_vring(int vid, uint16_t vring_idx,
> struct rte_vhost_vring *vring);
>
> +/**
> + * Get vhost RX queue avail count.
> + *
> + * @param vid
> + * vhost device ID
> + * @param qid
> + * virtio queue index in mq case
> + * @return
> + * num of desc available
> + */
> +uint32_t rte_vhost_rx_queue_count(int vid, uint16_t qid);
> +
> #ifdef __cplusplus
> }
> #endif
> diff --git a/lib/librte_vhost/rte_vhost_version.map
> b/lib/librte_vhost/rte_vhost_version.map
> index 0785873..1e70495 100644
> --- a/lib/librte_vhost/rte_vhost_version.map
> +++ b/lib/librte_vhost/rte_vhost_version.map
> @@ -45,3 +45,10 @@ DPDK_17.05 {
> rte_vhost_log_write;
>
> } DPDK_16.07;
> +
> +DPDK_17.08 {
> + global:
> +
> + rte_vhost_rx_queue_count;
> +
> +} DPDK_17.05;
> diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c
> index 0b19d2e..140d2ae 100644
> --- a/lib/librte_vhost/vhost.c
> +++ b/lib/librte_vhost/vhost.c
> @@ -475,3 +475,26 @@ rte_vhost_log_used_vring(int vid, uint16_t
> vring_idx,
>
> vhost_log_used_vring(dev, vq, offset, len);
> }
> +
> +uint32_t
> +rte_vhost_rx_queue_count(int vid, uint16_t qid)
> +{
> + struct virtio_net *dev;
> + struct vhost_virtqueue *vq;
> +
> + dev = get_device(vid);
> + if (!dev)
> + return 0;
> +
> + if (unlikely(qid >= dev->nr_vring || (qid & 1) == 0)) {
I assume the '& 1' is to ensure it's a virtio txq? It might be clearer to use the VIRTIO_TXQ var or similar to make this clearer.
> + RTE_LOG(ERR, VHOST_DATA, "(%d) %s: invalid virtqueue idx
> %d.\n",
> + dev->vid, __func__, qid);
> + return 0;
> + }
> +
> + vq = dev->virtqueue[qid];
> + if (unlikely(vq->enabled == 0))
> + return 0;
> +
> + return *((volatile uint16_t *)&vq->avail->idx) - vq->last_avail_idx;
> +}
> --
> 2.7.4
Acked-by: Ciara Loftus <ciara.loftus@intel.com>
On Tue, May 23, 2017 at 12:51:56PM +0000, Wang, Zhihong wrote:
>
>
> > -----Original Message-----
> > From: Jens Freimann [mailto:jfreiman@redhat.com]
> > Sent: Tuesday, May 23, 2017 7:54 PM
> > To: Wang, Zhihong <zhihong.wang@intel.com>
> > Cc: dev@dpdk.org; yuanhan.liu@linux.intel.com
> > Subject: Re: [dpdk-dev] [PATCH] vhost: support rx_queue_count
> >
> > On Mon, May 22, 2017 at 04:01:08PM -0400, Zhihong Wang wrote:
> > > This patch implements the ops rx_queue_count for vhost PMD by adding
> > > a helper function rte_vhost_rx_queue_count in vhost lib.
> > >
> > > The ops ops rx_queue_count gets vhost RX queue avail count and helps
> >
> > s/ops ops/ops/ ?
>
> Thanks a lot!
Seems you overlooked other comments, such as:
> > > + vq = dev->virtqueue[qid];
> >
> > check for vq == NULL?
> >
> > regards,
> > Jens
Besides, Jens, I'm not a big fan of "dev == NULL" over "!dev". I accept
both :)
--yliu
On Wed, May 24, 2017 at 04:14:19PM +0800, Yuanhan Liu wrote:
> On Tue, May 23, 2017 at 12:51:56PM +0000, Wang, Zhihong wrote:
> >
> >
> > > -----Original Message-----
> > > From: Jens Freimann [mailto:jfreiman@redhat.com]
> > > Sent: Tuesday, May 23, 2017 7:54 PM
> > > To: Wang, Zhihong <zhihong.wang@intel.com>
> > > Cc: dev@dpdk.org; yuanhan.liu@linux.intel.com
> > > Subject: Re: [dpdk-dev] [PATCH] vhost: support rx_queue_count
> > >
> > > On Mon, May 22, 2017 at 04:01:08PM -0400, Zhihong Wang wrote:
> > > > This patch implements the ops rx_queue_count for vhost PMD by adding
> > > > a helper function rte_vhost_rx_queue_count in vhost lib.
> > > >
> > > > The ops ops rx_queue_count gets vhost RX queue avail count and helps
> > >
> > > s/ops ops/ops/ ?
> >
> > Thanks a lot!
>
> Seems you overlooked other comments, such as:
>
> > > > + vq = dev->virtqueue[qid];
> > >
> > > check for vq == NULL?
> > >
> > > regards,
> > > Jens
>
> Besides, Jens, I'm not a big fan of "dev == NULL" over "!dev". I accept
> both :)
Personally I'm with you on this, but it says different in http://dpdk.org/doc/guides/contributing/coding_style.html
Anyway, up to you :)
regards,
Jens
On Wed, May 24, 2017 at 10:36:01AM +0200, Jens Freimann wrote:
> On Wed, May 24, 2017 at 04:14:19PM +0800, Yuanhan Liu wrote:
> > On Tue, May 23, 2017 at 12:51:56PM +0000, Wang, Zhihong wrote:
> > >
> > >
> > > > -----Original Message-----
> > > > From: Jens Freimann [mailto:jfreiman@redhat.com]
> > > > Sent: Tuesday, May 23, 2017 7:54 PM
> > > > To: Wang, Zhihong <zhihong.wang@intel.com>
> > > > Cc: dev@dpdk.org; yuanhan.liu@linux.intel.com
> > > > Subject: Re: [dpdk-dev] [PATCH] vhost: support rx_queue_count
> > > >
> > > > On Mon, May 22, 2017 at 04:01:08PM -0400, Zhihong Wang wrote:
> > > > > This patch implements the ops rx_queue_count for vhost PMD by adding
> > > > > a helper function rte_vhost_rx_queue_count in vhost lib.
> > > > >
> > > > > The ops ops rx_queue_count gets vhost RX queue avail count and helps
> > > >
> > > > s/ops ops/ops/ ?
> > >
> > > Thanks a lot!
> >
> > Seems you overlooked other comments, such as:
> >
> > > > > + vq = dev->virtqueue[qid];
> > > >
> > > > check for vq == NULL?
> > > >
> > > > regards,
> > > > Jens
> >
> > Besides, Jens, I'm not a big fan of "dev == NULL" over "!dev". I accept
> > both :)
>
> Personally I'm with you on this, but it says different in http://dpdk.org/doc/guides/contributing/coding_style.html
> Anyway, up to you :)
Yes, I know that. To make every body happy, I would suggset you to
follow the coding style. But if you have already choosen another way,
I won't bother to ask you do the change. Unless, it becomes a must
in future.
--yliu
> -----Original Message-----
> From: Yuanhan Liu [mailto:yuanhan.liu@linux.intel.com]
> Sent: Wednesday, May 24, 2017 4:43 PM
> To: Jens Freimann <jfreiman@redhat.com>
> Cc: Wang, Zhihong <zhihong.wang@intel.com>; dev@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH] vhost: support rx_queue_count
>
> On Wed, May 24, 2017 at 10:36:01AM +0200, Jens Freimann wrote:
> > On Wed, May 24, 2017 at 04:14:19PM +0800, Yuanhan Liu wrote:
> > > On Tue, May 23, 2017 at 12:51:56PM +0000, Wang, Zhihong wrote:
> > > >
> > > >
> > > > > -----Original Message-----
> > > > > From: Jens Freimann [mailto:jfreiman@redhat.com]
> > > > > Sent: Tuesday, May 23, 2017 7:54 PM
> > > > > To: Wang, Zhihong <zhihong.wang@intel.com>
> > > > > Cc: dev@dpdk.org; yuanhan.liu@linux.intel.com
> > > > > Subject: Re: [dpdk-dev] [PATCH] vhost: support rx_queue_count
> > > > >
> > > > > On Mon, May 22, 2017 at 04:01:08PM -0400, Zhihong Wang wrote:
> > > > > > This patch implements the ops rx_queue_count for vhost PMD by
> adding
> > > > > > a helper function rte_vhost_rx_queue_count in vhost lib.
> > > > > >
> > > > > > The ops ops rx_queue_count gets vhost RX queue avail count and
> helps
> > > > >
> > > > > s/ops ops/ops/ ?
> > > >
> > > > Thanks a lot!
> > >
> > > Seems you overlooked other comments, such as:
> > >
> > > > > > + vq = dev->virtqueue[qid];
> > > > >
> > > > > check for vq == NULL?
> > > > >
> > > > > regards,
> > > > > Jens
> > >
> > > Besides, Jens, I'm not a big fan of "dev == NULL" over "!dev". I accept
> > > both :)
> >
> > Personally I'm with you on this, but it says different in
> http://dpdk.org/doc/guides/contributing/coding_style.html
> > Anyway, up to you :)
>
> Yes, I know that. To make every body happy, I would suggset you to
> follow the coding style. But if you have already choosen another way,
> I won't bother to ask you do the change. Unless, it becomes a must
> in future.
Thanks Yuanhan and Jens! Will address these comments in v3.
>
> --yliu
@@ -973,6 +973,18 @@ eth_link_update(struct rte_eth_dev *dev __rte_unused,
return 0;
}
+static uint32_t
+eth_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id)
+{
+ struct vhost_queue *vq;
+
+ vq = dev->data->rx_queues[rx_queue_id];
+ if (!vq)
+ return 0;
+
+ return rte_vhost_rx_queue_count(vq->vid, vq->virtqueue_id);
+}
+
static const struct eth_dev_ops ops = {
.dev_start = eth_dev_start,
.dev_stop = eth_dev_stop,
@@ -984,6 +996,7 @@ static const struct eth_dev_ops ops = {
.rx_queue_release = eth_queue_release,
.tx_queue_release = eth_queue_release,
.tx_done_cleanup = eth_tx_done_cleanup,
+ .rx_queue_count = eth_rx_queue_count,
.link_update = eth_link_update,
.stats_get = eth_stats_get,
.stats_reset = eth_stats_reset,
@@ -432,6 +432,18 @@ int rte_vhost_get_mem_table(int vid, struct rte_vhost_memory **mem);
int rte_vhost_get_vhost_vring(int vid, uint16_t vring_idx,
struct rte_vhost_vring *vring);
+/**
+ * Get vhost RX queue avail count.
+ *
+ * @param vid
+ * vhost device ID
+ * @param qid
+ * virtio queue index in mq case
+ * @return
+ * num of desc available
+ */
+uint32_t rte_vhost_rx_queue_count(int vid, uint16_t qid);
+
#ifdef __cplusplus
}
#endif
@@ -45,3 +45,10 @@ DPDK_17.05 {
rte_vhost_log_write;
} DPDK_16.07;
+
+DPDK_17.08 {
+ global:
+
+ rte_vhost_rx_queue_count;
+
+} DPDK_17.05;
@@ -475,3 +475,26 @@ rte_vhost_log_used_vring(int vid, uint16_t vring_idx,
vhost_log_used_vring(dev, vq, offset, len);
}
+
+uint32_t
+rte_vhost_rx_queue_count(int vid, uint16_t qid)
+{
+ struct virtio_net *dev;
+ struct vhost_virtqueue *vq;
+
+ dev = get_device(vid);
+ if (!dev)
+ return 0;
+
+ if (unlikely(qid >= dev->nr_vring || (qid & 1) == 0)) {
+ RTE_LOG(ERR, VHOST_DATA, "(%d) %s: invalid virtqueue idx %d.\n",
+ dev->vid, __func__, qid);
+ return 0;
+ }
+
+ vq = dev->virtqueue[qid];
+ if (unlikely(vq->enabled == 0))
+ return 0;
+
+ return *((volatile uint16_t *)&vq->avail->idx) - vq->last_avail_idx;
+}