linux-kernel - RE: [Bug report] rtw89: 8852b: IO_PAGE_FAULTs with beacon filter feature enabled

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Message-ID: <148ed65c53be4ef29246d372dd0fef8e@realtek.com>
Date: Wed, 16 Apr 2025 00:49:20 +0000
From: Ping-Ke Shih <pkshih@...ltek.com>
To: Fedor Pchelkin <boddah8794@...il.com>, Bernie Huang <phhuang@...ltek.com>
CC: "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [Bug report] rtw89: 8852b: IO_PAGE_FAULTs with beacon filter feature enabled

Fedor Pchelkin <boddah8794@...il.com> wrote:
> Hi,
> 
> there are IO_PAGE_FAULT errors occassionally thrown into the log with
> rtw89_8852be-compatible device in use:
> 
> [    7.135509] rtw89_8852be 0000:03:00.0: loaded firmware rtw89/rtw8852b_fw-1.bin
> [    7.135610] rtw89_8852be 0000:03:00.0: enabling device (0000 -> 0003)
> [    7.137074] rtw89_8852be 0000:03:00.0: Firmware version 0.29.29.8 (39dbf50f), cmd version 0, type 5
> [    7.137079] rtw89_8852be 0000:03:00.0: Firmware version 0.29.29.8 (39dbf50f), cmd version 0, type 3
> [    7.423852] rtw89_8852be 0000:03:00.0: chip rfe_type is 1
> [    7.452843] rtw89_8852be 0000:03:00.0: rfkill hardware state changed to enable
> [    7.478466] rtw89_8852be 0000:03:00.0 wlo1: renamed from wlan0
> ...
> [ 1361.803384] rtw89_8852be 0000:03:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0010 address=0x0
> flags=0x0000]
> [ 1434.918012] rtw89_8852be 0000:03:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0010 address=0x0
> flags=0x0000]
> [ 1551.553344] rtw89_8852be 0000:03:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0010 address=0x0
> flags=0x0000]
> [ 1649.346804] rtw89_8852be 0000:03:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0010 address=0x0
> flags=0x0000]
> 
> 
> address and flags are always all zeros. It is reproducible on the current
> mainline v6.15-rc2 kernel and v0.29.29.8 fw version.
> 
> 
> It is most probably related to the beacon filter feature enabled in the
> firmware. Bisection in the kernel leads to
> 
> commit d56c261e5214e51e2c6d22149f63555039b5601e (HEAD)
> Author: Po-Hao Huang <phhuang@...ltek.com>
> Date:   Thu Nov 28 13:54:29 2024 +0800
> 
>     wifi: rtw89: 8852b: add beacon filter and CQM support
> 
> 
> and in linux-firmware to
> 
> commit 20cace1adf6a33cac73595ea3202eb784dea98a6
> Author: Po-Hao Huang <phhuang@...ltek.com>
> Date:   Thu Sep 19 17:02:28 2024 +0800
> 
>     rtw89: 8852b: update fw to v0.29.29.7
> 
>     Enable beacon filter feature.
> 
> 

Thanks for the report. 

As bisection, can I summarize as below table?

    d56c261e52           firmware             IO_PAGE_FAULT
   (CQM support)
  ---------------      -----------          -----------------
      o                 0.29.29.7                  yes
      o                 0.29.29.5                  no
      x                 0.29.29.7                  no
      x                 0.29.29.5                  no

If this table is correct, we will check the beacon filter feature in firmware.