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RTW88(4)		    Kernel Interfaces Manual		      RTW88(4)

NAME
       rtw88 --	Realtek	IEEE 802.11n/ac	wireless network driver

SYNOPSIS
       The   driver   will   auto-load	without	 any  user  interaction	 using
       devmatch(8) if enabled in rc.conf(5).

       Only if auto-loading is explicitly disabled, place the following	 lines
       in rc.conf(5) to	manually load the driver as a module at	boot time:

	     kld_list="${kld_list} if_rtw88"

       The driver should automatically load any	rtw88fw(4) firmware needed for
       the particular chipset.

       It is discouraged to load the driver from loader(8).

DESCRIPTION
       The rtw88 driver	is derived from	Realtek's Linux	rtw88 driver.

       The  driver  uses  the  linuxkpi_wlan  and linuxkpi compat framework to
       bridge between the Linux	and native FreeBSD driver code as well	as  to
       the native net80211(4) wireless stack.

HARDWARE
       The rtw88 driver	supports PCIe devices with the following chipsets:

	     	 Realtek 802.11n  wireless 8723de (RTL8723DE)
	     	 Realtek 802.11ac wireless 8821ce (RTL8821CE)
	     	 Realtek 802.11ac wireless 8822be (RTL8822BE)
	     	 Realtek 802.11ac wireless 8822ce (RTL8822CE)

LOADER TUNABLES
       compat.linuxkpi.skb.mem_limit
	       If  you	are  running a 64bit system with more than 4GB of main
	       memory you need to set this tunable to 1	in 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.

SEE ALSO
       rtw88fw(4),    wlan(4),	  networking(7),    fwget(8),	  ifconfig(8),
       wpa_supplicant(8)

HISTORY
       The rtw88 driver	first appeared in FreeBSD 13.2.

BUGS
       Certainly.

       Does not	seem to	work (reliably)	on machines with more than 4GB of main
       memory.	See in the "LOADER TUNABLES" section above.

       While  rtw88  supports  802.11a/b/g/n/ac	 modes,	the compatibility code
       currently only supports 802.11a/b/g modes.  Support for	802.11n/ac  is
       yet to come.

FreeBSD	14.3		       November	10, 2024		      RTW88(4)

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=rtw88&sektion=4&manpath=FreeBSD+14.3-RELEASE+and+Ports>

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