From: Andy Pei <andy.pei@intel.com>
To: dev@dpdk.org
Cc: rosen.xu@intel.com, xiaolong.ye@intel.com, tiwei.bie@intel.com,
xiao.w.wang@intel.com
Subject: [dpdk-dev] [PATCH 1/4] vhost: introduce new API to get the active vring number
Date: Fri, 6 Sep 2019 11:20:48 +0800 [thread overview]
Message-ID: <1567740051-367172-1-git-send-email-andy.pei@intel.com> (raw)
It's useful for hardware vhost backend (like vDPA devices) to set
multiqueue configuration accordingly.
Signed-off-by: Xiaolong Ye <xiaolong.ye@intel.com>
Signed-off-by: Andy Pei <andy.pei@intel.com>
---
lib/librte_vhost/rte_vhost.h | 12 ++++++++++++
lib/librte_vhost/vhost.c | 19 +++++++++++++++++++
2 files changed, 31 insertions(+)
diff --git a/lib/librte_vhost/rte_vhost.h b/lib/librte_vhost/rte_vhost.h
index 7fb1729..28811b0 100644
--- a/lib/librte_vhost/rte_vhost.h
+++ b/lib/librte_vhost/rte_vhost.h
@@ -525,6 +525,18 @@ int rte_vhost_driver_callback_register(const char *path,
uint16_t rte_vhost_get_vring_num(int vid);
/**
+ * Get the number of active vrings of the device.
+ *
+ * @param vid
+ * vhost device ID
+ *
+ * @return
+ * The number of active vrings, 0 on failure
+ */
+uint16_t
+rte_vhost_get_active_vring_num(int vid);
+
+/**
* Get the virtio net device's ifname, which is the vhost-user socket
* file path.
*
diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c
index 981837b..c714818 100644
--- a/lib/librte_vhost/vhost.c
+++ b/lib/librte_vhost/vhost.c
@@ -674,6 +674,25 @@
return dev->nr_vring;
}
+uint16_t
+rte_vhost_get_active_vring_num(int vid)
+{
+ struct virtio_net *dev = get_device(vid);
+ struct vhost_virtqueue *vq;
+ uint16_t qid;
+
+ if (dev == NULL)
+ return 0;
+
+ for (qid = 0; qid < dev->nr_vring; qid++) {
+ vq = dev->virtqueue[qid];
+ if (!vq->enabled)
+ break;
+ }
+
+ return qid;
+}
+
int
rte_vhost_get_ifname(int vid, char *buf, size_t len)
{
--
1.8.3.1
next reply other threads:[~2019-09-06 3:33 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-06 3:20 Andy Pei [this message]
2019-09-06 3:20 ` [dpdk-dev] [PATCH 2/4] net/ifcvf: add multiqueue configuration Andy Pei
2019-09-06 3:20 ` [dpdk-dev] [PATCH 3/4] vhost: call vDPA callback at the end of vring enable handler Andy Pei
2019-09-12 7:41 ` Wang, Xiao W
2019-09-17 7:29 ` Pei, Andy
2019-09-06 3:20 ` [dpdk-dev] [PATCH 4/4] net/ifcvf: enable mutliqueue support Andy Pei
2019-09-12 7:41 ` Wang, Xiao W
2019-09-06 13:25 ` [dpdk-dev] [PATCH 1/4] vhost: introduce new API to get the active vring number Aaron Conole
2019-09-17 9:25 ` Pei, Andy
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