diff options
Diffstat (limited to 'share/man/man4/ntb_transport.4')
| -rw-r--r-- | share/man/man4/ntb_transport.4 | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/share/man/man4/ntb_transport.4 b/share/man/man4/ntb_transport.4 index 3df9eed24438..0b3ad2e5c043 100644 --- a/share/man/man4/ntb_transport.4 +++ b/share/man/man4/ntb_transport.4 @@ -25,7 +25,7 @@ .\" .\" $FreeBSD$ .\" -.Dd August 29, 2019 +.Dd November 9, 2019 .Dt NTB_TRANSPORT 4 .Os .Sh NAME @@ -64,6 +64,12 @@ is a name of the driver to attach (empty means any), is a number of queues to allocate (empty means automatic). The default configuration is empty string, which means single consumer with one queue per memory window, allowing any driver to attach. +.It Va hint.ntb_transport. Ns Ar X Ns Va .compact +Non-zero value enables compact version of sratchpad protocol, using twice +less registers. +Enabled automatically if there is not enough registers to negotiate all +available memory windows. +The compact version does not support memory windows of 4GB and above. .El .Sh DESCRIPTION The @@ -85,7 +91,8 @@ instance: .It 1 or more memory windows; .It -6 scratchpads, plus 2 more for each additional memory window; +6 scratchpads, plus 2 more for each additional memory window, +or 3 plus 1 in case of compact protocol; .It 1 doorbell for each memory window or configured queue. .El |