1.\"- 2.\" Copyright (c) 2022-2023 Bjoern A. Zeeb 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.Dd September 5, 2023 26.Dt RTW88 4 27.Os 28.Sh NAME 29.Nm rtw88 30.Nd Realtek IEEE 802.11n/ac wireless network driver 31.Sh SYNOPSIS 32.Sy The driver is temporary disconnected from the build. 33.Pp 34The driver will auto-load without any user interaction using 35.Xr devmatch 8 36if enabled in 37.Xr rc.conf 5 . 38.Pp 39Only if auto-loading is explicitly disabled, place the following 40lines in 41.Xr rc.conf 5 42to manually load the driver as a module at boot time: 43.Bd -literal -offset indent 44kld_list="${kld_list} if_rtw88" 45.Ed 46.Pp 47It is discouraged to load the driver from 48.Xr loader 8 . 49.Sh DESCRIPTION 50The 51.Nm 52driver is derived from Realtek's Linux rtw88 driver and provides support for 53the following chipsets: 54.Pp 55.Bl -tag -width Ds -offset indent -compact 56.It Realtek 802.11n wireless 8723de (RTL8723DE) 57.It Realtek 802.11ac wireless 8821ce (RTL8821CE) 58.It Realtek 802.11ac wireless 8822be (RTL8822BE) 59.It Realtek 802.11ac wireless 8822ce (RTL8822CE) 60.El 61.Pp 62This driver requires firmware to be loaded before it will work. 63The package 64.Pa wifi-firmware-rtw88-kmod 65from the 66.Pa ports/net/wifi-firmware-rtw88-kmod 67port needs to be installed before the driver is loaded. 68Otherwise no 69.Xr wlan 4 70interface can be created using 71.Xr ifconfig 8 . 72One can use 73.Xr fwget 8 74to install the correct firmware package. 75.Pp 76The driver uses the 77.\" No LinuxKPI man pages so no .Xr here. 78.Em linuxkpi_wlan 79and 80.Em linuxkpi 81compat framework to bridge between the Linux and 82native 83.Fx 84driver code as well as to the native 85.Xr net80211 4 86wireless stack. 87.Pp 88While 89.Nm 90supports all 802.11 a/b/g/n and ac 91the compatibility code currently only supports 802.11 a/b/g modes. 92Support for 802.11 n/ac is to come. 93.Sh LOADER TUNABLES 94.Bl -tag -width indent 95.It Va compat.linuxkpi.skb.mem_limit 96If you are running a 64bit system with more than 4GB of main memory 97you need to set this tunable to 98.Sy 1 99in 100.Xr loader.conf 5 101and reboot once to make it effective. 102This tunable will work around a problem with DMA and limit allocations 103for network buffer memory to the lower 32bit of physical memory and 104make the driver work. 105.El 106.Sh BUGS 107Certainly. 108.Pp 109Does not seem to work (reliably) on machines with more than 4GB of 110main memory. 111See in the 112.Sx LOADER TUNABLES 113section above. 114.Sh SEE ALSO 115.Xr rtw88fw 4 , 116.Xr wlan 4 , 117.Xr fwget 8 , 118.Xr ifconfig 8 , 119.Xr wpa_supplicant 8 120.Sh HISTORY 121The 122.Nm 123driver first appeared in 124.Fx 13.2 . 125