New upstream version 17.08

[deb_dpdk.git] / lib / librte_vhost / vhost.c

diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c
index 1f565fb..0b6aa1c 100644 (file)
--- a/lib/librte_vhost/vhost.c
+++ b/lib/librte_vhost/vhost.c
@@ -40,6 +40,7 @@
 #include <numaif.h>
 #endif
 
+#include <rte_errno.h>
 #include <rte_ethdev.h>
 #include <rte_log.h>
 #include <rte_string_fns.h>
@@ -272,7 +273,7 @@ rte_vhost_get_mtu(int vid, uint16_t *mtu)
        if (!(dev->flags & VIRTIO_DEV_READY))
                return -EAGAIN;
 
-       if (!(dev->features & VIRTIO_NET_F_MTU))
+       if (!(dev->features & (1ULL << VIRTIO_NET_F_MTU)))
                return -ENOTSUP;
 
        *mtu = dev->mtu;
@@ -295,7 +296,8 @@ rte_vhost_get_numa_node(int vid)
                            MPOL_F_NODE | MPOL_F_ADDR);
        if (ret < 0) {
                RTE_LOG(ERR, VHOST_CONFIG,
-                       "(%d) failed to query numa node: %d\n", vid, ret);
+                       "(%d) failed to query numa node: %s\n",
+                       vid, rte_strerror(errno));
                return -1;
        }
 
@@ -475,3 +477,29 @@ 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 == NULL)
+               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 (vq == NULL)
+               return 0;
+
+       if (unlikely(vq->enabled == 0 || vq->avail == NULL))
+               return 0;
+
+       return *((volatile uint16_t *)&vq->avail->idx) - vq->last_avail_idx;
+}