diff options
Diffstat (limited to 'share')
| -rw-r--r-- | share/man/man4/rtw88.4 | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/share/man/man4/rtw88.4 b/share/man/man4/rtw88.4 index b34fbf96c5df..0ace002e4bde 100644 --- a/share/man/man4/rtw88.4 +++ b/share/man/man4/rtw88.4 @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd March 31, 2022 +.Dd May 5, 2022 .Dt rtw88 4 .Os .Sh NAME @@ -78,11 +78,27 @@ While supports all 802.11 a/b/g/n and ac the compatibility code currently only supports 802.11 a/b/g modes. Support for 802.11 n/ac is to come. +.Sh LOADER TUNABLES +.Bl -tag -width indent +.It Va compat.linuxkpi.skb.mem_limit +If you are running a 64bit system with more than 4GB of main mmeory +you need to set this tunable to +.Sy 1 +in +.Xr loader.conf 5 +and reboot once to make it effective. +This tunable will work around a problem with DMA and limit allocations +for network buffer memory to the lower 32bit of physical memory and +make the driver work. +.El .Sh BUGS Certainly. .Pp Does not seem to work (reliably) on machines with more than 4GB of main memory. +See in the +.Sx LOADER TUNABLES +section above. .Sh SEE ALSO .Xr rtw88fw 4 , .Xr wlan 4 , |