Import multiqueue VirtIO net driver from my user/bryanv/vtnetmq branch

This is a significant rewrite of much of the previous driver; lots of
misc. cleanup was also performed, and support for a few other minor
features was also added.

1 files changed, 16 insertions, 0 deletions

diff --git a/share/man/man4/vtnet.4 b/share/man/man4/vtnet.4
index 8d4d202..c7b2189 100644
--- a/share/man/man4/vtnet.4
+++ b/share/man/man4/vtnet.4
@@ -69,14 +69,30 @@ prompt before booting the kernel or stored in
 .Xr loader.conf 5 .
 .Bl -tag -width "xxxxxx"
 .It Va hw.vtnet.csum_disable
+.It Va hw.vtnet. Ns Ar X Ns Va .csum_disable
 This tunable disables receive and send checksum offload.
 The default value is 0.
 .It Va hw.vtnet.tso_disable
+.It Va hw.vtnet. Ns Ar X Ns Va .tso_disable
 This tunable disables TSO.
 The default value is 0.
 .It Va hw.vtnet.lro_disable
+.It Va hw.vtnet. Ns Ar X Ns Va .lro_disable
 This tunable disables LRO.
 The default value is 0.
+.It Va hw.vtnet.mq_disable
+.It Va hw.vtnet. Ns Ar X Ns Va .mq_disable
+This tunable disables multiqueue.
+The default value is 0.
+.It Va hw.vtnet.mq_max_pairs
+.It Va hw.vtnet. Ns Ar X Ns Va .mq_max_pairs
+This tunable sets the maximum number of transmit and receive queue pairs.
+Multiple queues are only supported when the Multiqueue feature is negotiated.
+This driver supports a maximum of 8 queue pairs.
+The number of queue pairs used is the lesser of the maximum supported by the
+driver and the hypervisor, the number of CPUs present in the guest, and this
+tunable if not zero.
+The default value is 0.
 .El
 .Sh SEE ALSO
 .Xr arp 4 ,