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vhost: add helpers for packed virtqueues

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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>
Acked-by: Tiwei Bie <tiwei.bie@intel.com>
This commit is contained in:
Jens Freimann 2018-07-06 09:07:09 +02:00 committed by Thomas Monjalon
parent 297b1e7350
commit d3211c98c4
1 changed files with 13 additions and 0 deletions
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13
lib/librte_vhost/vhost.h
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@ -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_packed_desc *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
/*