From: Jens Freimann <jfreim...@redhat.com>
Add some helper functions to check descriptor flags
and check if a vring is of type packed.
Signed-off-by: Jens Freimann <jfreim...@redhat.com>
Signed-off-by: Maxime Coquelin <maxime.coque...@redhat.com>
---
lib/librte_vhost/vhost.h | 6 ++++++
lib/librte_vhost/virtio-packed.h | 8 ++++++++
2 files changed, 14 insertions(+)
diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
index cecd5c1ee..cabbc3ab7 100644
--- a/lib/librte_vhost/vhost.h
+++ b/lib/librte_vhost/vhost.h
@@ -318,6 +318,12 @@ struct virtio_net {
struct vhost_user_extern_ops extern_ops;
} __rte_cache_aligned;
+static __rte_always_inline bool
+vq_is_packed(struct virtio_net *dev)
+{
+ return dev->features & (1ull << VIRTIO_F_RING_PACKED);
+}
+
#define VHOST_LOG_PAGE 4096
/*
diff --git a/lib/librte_vhost/virtio-packed.h b/lib/librte_vhost/virtio-packed.h
index 744b3991b..d386cb6df 100644
--- a/lib/librte_vhost/virtio-packed.h
+++ b/lib/librte_vhost/virtio-packed.h
@@ -19,4 +19,12 @@ struct vring_desc_packed {
uint16_t flags;
};
+
+static inline bool
+desc_is_avail(struct vring_desc_packed *desc, bool wrap_counter)
+{
+ return wrap_counter == !!(desc->flags & VRING_DESC_F_AVAIL) &&
+ wrap_counter != !!(desc->flags & VRING_DESC_F_USED);
+}
+
#endif /* __VIRTIO_PACKED_H */
--
2.14.4
