Add few more functions to export few more fields or informations of
virtio_net struct, to applications, as we are gonna make them private.
It includes:
- rte_vhost_avail_entries
It's actually a rename of "rte_vring_available_entries", with the
"vring" to "vhost" name change to keep the consistency of other
functions.
- rte_vhost_get_queue_num
Exports the "virt_qp_nb" field.
- rte_vhost_get_numa_node
Exports the numa node from where the virtio net device is allocated.
Signed-off-by: Yuanhan Liu <yuanhan.liu at linux.intel.com>
---
drivers/net/vhost/rte_eth_vhost.c | 18 ++++---------
examples/vhost/main.c | 4 +--
lib/librte_vhost/rte_virtio_net.h | 37 +++++++++++++++++++++++++++
lib/librte_vhost/virtio-net.c | 54 +++++++++++++++++++++++++++++++++++++++
4 files changed, 98 insertions(+), 15 deletions(-)
diff --git a/drivers/net/vhost/rte_eth_vhost.c
b/drivers/net/vhost/rte_eth_vhost.c
index 290fd9e..9763cd4 100644
--- a/drivers/net/vhost/rte_eth_vhost.c
+++ b/drivers/net/vhost/rte_eth_vhost.c
@@ -33,9 +33,6 @@
#include <unistd.h>
#include <pthread.h>
#include <stdbool.h>
-#ifdef RTE_LIBRTE_VHOST_NUMA
-#include <numaif.h>
-#endif
#include <rte_mbuf.h>
#include <rte_ethdev.h>
@@ -228,7 +225,7 @@ new_device(struct virtio_net *dev)
struct vhost_queue *vq;
unsigned i;
#ifdef RTE_LIBRTE_VHOST_NUMA
- int newnode, ret;
+ int newnode;
#endif
if (dev == NULL) {
@@ -247,14 +244,9 @@ new_device(struct virtio_net *dev)
internal->vid = dev->vid;
#ifdef RTE_LIBRTE_VHOST_NUMA
- ret = get_mempolicy(&newnode, NULL, 0, dev,
- MPOL_F_NODE | MPOL_F_ADDR);
- if (ret < 0) {
- RTE_LOG(ERR, PMD, "Unknown numa node\n");
- return -1;
- }
-
- eth_dev->data->numa_node = newnode;
+ newnode = rte_vhost_get_numa_node(dev->vid);
+ if (newnode > 0)
+ eth_dev->data->numa_node = newnode;
#endif
for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
@@ -274,7 +266,7 @@ new_device(struct virtio_net *dev)
vq->port = eth_dev->data->port_id;
}
- for (i = 0; i < dev->virt_qp_nb * VIRTIO_QNUM; i++)
+ for (i = 0; i < rte_vhost_get_queue_num(dev->vid) * VIRTIO_QNUM; i++)
rte_vhost_enable_guest_notification(dev, i, 0);
dev->priv = eth_dev;
diff --git a/examples/vhost/main.c b/examples/vhost/main.c
index e395e4a..145fa6f 100644
--- a/examples/vhost/main.c
+++ b/examples/vhost/main.c
@@ -1056,13 +1056,13 @@ drain_eth_rx(struct vhost_dev *vdev)
* to diminish packet loss.
*/
if (enable_retry &&
- unlikely(rx_count > rte_vring_available_entries(dev,
+ unlikely(rx_count > rte_vhost_avail_entries(vdev->vid,
VIRTIO_RXQ))) {
uint32_t retry;
for (retry = 0; retry < burst_rx_retry_num; retry++) {
rte_delay_us(burst_rx_delay_time);
- if (rx_count <= rte_vring_available_entries(dev,
+ if (rx_count <= rte_vhost_avail_entries(vdev->vid,
VIRTIO_RXQ))
break;
}
diff --git a/lib/librte_vhost/rte_virtio_net.h
b/lib/librte_vhost/rte_virtio_net.h
index bc64e89..27f6847 100644
--- a/lib/librte_vhost/rte_virtio_net.h
+++ b/lib/librte_vhost/rte_virtio_net.h
@@ -245,6 +245,43 @@ int rte_vhost_driver_callback_register(struct
virtio_net_device_ops const * cons
int rte_vhost_driver_session_start(void);
/**
+ * Get how many avail entries are left in the queue @queue_id.
+ *
+ * @param vid
+ * virtio-net device ID
+ * @param queue_id
+ * virtio queue index in mq case
+ *
+ * @return
+ * num of avail entires left
+ */
+uint16_t rte_vhost_avail_entries(int vid, uint16_t queue_id);
+
+/**
+ * Get the number of queues the device supports.
+ *
+ * @param vid
+ * virtio-net device ID
+ *
+ * @return
+ * The number of queues, 0 on failure
+ */
+uint32_t rte_vhost_get_queue_num(int vid);
+
+/**
+ * Get the numa node from which the virtio net device's memory
+ * is allocated.
+ *
+ * @param vid
+ * virtio-net device ID
+ *
+ * @return
+ * The numa node, -1 on failure
+ */
+int rte_vhost_get_numa_node(int vid);
+
+
+/**
* This function adds buffers to the virtio devices RX virtqueue. Buffers can
* be received from the physical port or from another virtual device. A packet
* count is returned to indicate the number of packets that were succesfully
diff --git a/lib/librte_vhost/virtio-net.c b/lib/librte_vhost/virtio-net.c
index ea28090..6bf4d87 100644
--- a/lib/librte_vhost/virtio-net.c
+++ b/lib/librte_vhost/virtio-net.c
@@ -753,6 +753,60 @@ int rte_vhost_feature_disable(uint64_t feature_mask)
return 0;
}
+uint16_t
+rte_vhost_avail_entries(int vid, uint16_t queue_id)
+{
+ struct virtio_net *dev;
+ struct vhost_virtqueue *vq;
+
+ dev = get_device(vid);
+ if (!dev)
+ return 0;
+
+ vq = dev->virtqueue[queue_id];
+ if (!vq->enabled)
+ return 0;
+
+ return *(volatile uint16_t *)&vq->avail->idx - vq->last_used_idx_res;
+}
+
+uint32_t
+rte_vhost_get_queue_num(int vid)
+{
+ struct virtio_net *dev = get_device(vid);
+
+ if (dev == NULL)
+ return 0;
+
+ return dev->virt_qp_nb;
+}
+
+int
+rte_vhost_get_numa_node(int vid)
+{
+#ifdef RTE_LIBRTE_VHOST_NUMA
+ struct virtio_net *dev = get_device(vid);
+ int numa_node;
+ int ret;
+
+ if (dev == NULL)
+ return -1;
+
+ ret = get_mempolicy(&numa_node, NULL, 0, dev,
+ MPOL_F_NODE | MPOL_F_ADDR);
+ if (ret < 0) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "(%d) failed to query numa node: %d\n", vid, ret);
+ return -1;
+ }
+
+ return numa_node;
+#else
+ RTE_SET_USED(vid);
+ return -1;
+#endif
+}
+
int rte_vhost_feature_enable(uint64_t feature_mask)
{
if ((feature_mask & VHOST_SUPPORTED_FEATURES) == feature_mask) {
--
1.9.0
