b95fa4203d
Address warnings (but one) from mandoc -T lint for these man pages. Sponsored by: The FreeBSD Foundation MFC after: 3 days
114 lines
3.3 KiB
Groff
114 lines
3.3 KiB
Groff
.\"-
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.\" Copyright (c) 2022 Bjoern A. Zeeb
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd April 22, 2023
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.Dt RTW88 4
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.Os
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.Sh NAME
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.Nm rtw88
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.Nd Realtek IEEE 802.11n/ac wireless network driver
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.Sh SYNOPSIS
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The driver will auto-load without any user interaction using
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.Xr devmatch 8
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if enabled in
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.Xr rc.conf 5 .
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.Pp
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Only if auto-loading is explicitly disabled, place the following
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lines in
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.Xr rc.conf 5
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to manually load the driver as a module at boot time:
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.Bd -literal -offset indent
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kld_list="${kld_list} if_rtw88"
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.Ed
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.Pp
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The driver should automatically load any
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.Xr rtw88fw 4
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firmware needed for the particular chipset.
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.Pp
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It is discouraged to load the driver from
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.Xr loader 8 .
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.Sh DESCRIPTION
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The
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.Nm
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driver is derived from Realtek's Linux rtw88 driver and provides support for
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the following chipsets:
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.Pp
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.Bl -tag -width Ds -offset indent -compact
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.It Realtek 802.11n wireless 8723de (RTL8723DE)
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.It Realtek 802.11ac wireless 8821ce (RTL8821CE)
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.It Realtek 802.11ac wireless 8822be (RTL8822BE)
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.It Realtek 802.11ac wireless 8822ce (RTL8822CE)
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.El
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.Pp
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The driver uses the
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.\" No LinuxKPI man pages so no .Xr here.
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.Em linuxkpi_wlan
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and
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.Em linuxkpi
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compat framework to bridge between the Linux and
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native
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.Fx
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driver code as well as to the native
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.Xr net80211 4
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wireless stack.
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.Pp
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While
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.Nm
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supports all 802.11 a/b/g/n and ac
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the compatibility code currently only supports 802.11 a/b/g modes.
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Support for 802.11 n/ac is to come.
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.Sh LOADER TUNABLES
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.Bl -tag -width indent
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.It Va compat.linuxkpi.skb.mem_limit
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If you are running a 64bit system with more than 4GB of main memory
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you need to set this tunable to
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.Sy 1
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in
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.Xr loader.conf 5
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and reboot once to make it effective.
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This tunable will work around a problem with DMA and limit allocations
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for network buffer memory to the lower 32bit of physical memory and
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make the driver work.
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.El
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.Sh BUGS
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Certainly.
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.Pp
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Does not seem to work (reliably) on machines with more than 4GB of
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main memory.
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See in the
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.Sx LOADER TUNABLES
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section above.
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.Sh SEE ALSO
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.Xr rtw88fw 4 ,
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.Xr wlan 4 ,
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.Xr ifconfig 8 ,
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.Xr wpa_supplicant 8
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Fx 13.2 .
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