netdev - Re: r8169: rtl8168ep_driver_stop disables the DASH port

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Date:   Mon, 14 Mar 2022 16:05:25 +0200
From:   Yanko Kaneti <yaneti@...lera.com>
To:     Kevin_cheng <kevin_cheng@...ltek.com>
Cc:     "hkallweit1@...il.com" <hkallweit1@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Nicfae <Nicfae@...ltek.com>
Subject: Re: r8169:  rtl8168ep_driver_stop disables the DASH port

On Mon, 2022-03-14 at 01:00 +0000, Kevin_cheng wrote:
Hello Kevin,

> Thanks for your email. Linux DASH requires specific driver and client
> tool. It depends on the manufacturer’s requirement. You need to
> contact ASRock to make sure they support Linux DASH and have verified
> it.

Thanks for the answer but its not much help for me.
I am not going to use a driver that's not in mainline.

I wasn't really expecting full DASH support but that at least
r8169/linux does not prevent the limied DASH web interface functionality
from working.

Currently this is not the case on this board with the current BIOS:
 - Once the kernel is loaded the DASH web interface power management
(reset, hard off) no longer works
 - Normal shutdown or r8169 module unload actually disconnects the phy.
 
It would be nice if DASH basics worked without being broken/supported by
the OS.

Regards
Yanko

> 
> Best Regards
> Kevin Cheng
> Technical Support Dept.
> Realtek Semiconductor Corp.
> 
> -----Original Message-----
> From: Yanko Kaneti <yaneti@...lera.com> 
> Sent: Friday, March 11, 2022 9:12 PM
> To: Heiner Kallweit <hkallweit1@...il.com>; nic_swsd
> <nic_swsd@...ltek.com>
> Cc: netdev <netdev@...r.kernel.org>
> Subject: r8169: rtl8168ep_driver_stop disables the DASH port
> 
> Hello,
> 
> Testing DASH on a ASRock A520M-HDVP/DASH, which has a RTL8111/8168 EP
> chip. DASH is enabled and seems to work on BIOS/firmware level.
> 
> It seems that r8169's cleanup/exit in rtl8168ep_driver_stop manages to
> actually stop the LAN port, hence cutting the system remote
> management.
> 
> This is evident on plain shutdown or rmmod r8169.
> If one does a hardware reset or echo "b" > /proc/sysrq-trigger  the
> cleanup doesn't happen and the DASH firmware remains in working order
> and the LAN port remains up.
> 
> A520M-HDVP/DASH BIOS ver 1.70
> Reatlek fw:
>  Firmware Version:               3.0.0.20200423
>  Version String:         20200428.1200000113
>  
> I have no idea if its possible or how to update the realtek firmware,
> preferably from Linux.
> 
> Various other DASH functionality seems to not work but basic working
> power managements is really a deal breaker for the whole thing.
> 
> 
> Regards
> Yanko
> ------Please consider the environment before printing this e-mail.