[v7,02/15] vhost: add helpers for packed virtqueues
diff mbox series

Message ID 20180704215438.5579-3-maxime.coquelin@redhat.com
State Superseded, archived
Delegated to: Maxime Coquelin
Headers show
Series
  • Vhost: add support to packed ring layout
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Checks

Context Check Description
ci/Intel-compilation fail Compilation issues

Commit Message

Maxime Coquelin July 4, 2018, 9:54 p.m. UTC
From: Jens Freimann <jfreimann@redhat.com>

Add some helper functions to check descriptor flags
and check if a vring is of type packed.

Signed-off-by: Jens Freimann <jfreimann@redhat.com>
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
 lib/librte_vhost/vhost.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

Patch
diff mbox series

diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
index d1f3a4d22..7124af001 100644
--- a/lib/librte_vhost/vhost.h
+++ b/lib/librte_vhost/vhost.h
@@ -344,6 +344,19 @@  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);
+}
+
+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);
+}
+
 #define VHOST_LOG_PAGE	4096
 
 /*