netdev - Re: [PATCH net-next 4/7] net: pcs: xpcs: adapt Wangxun NICs for SGMII mode

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Mon, 24 Jul 2023 11:34:34 +0100
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Jiawen Wu <jiawenwu@...stnetic.com>
Cc: netdev@...r.kernel.org, andrew@...n.ch, hkallweit1@...il.com,
	Jose.Abreu@...opsys.com, mengyuanlou@...-swift.com
Subject: Re: [PATCH net-next 4/7] net: pcs: xpcs: adapt Wangxun NICs for
 SGMII mode

On Mon, Jul 24, 2023 at 06:23:38PM +0800, Jiawen Wu wrote:
> Wangxun NICs support the connection with SFP to RJ45 module. In this case,
> PCS need to be configured in SGMII mode.
> 
> Accroding to chapter 6.11.1 "SGMII Auto-Negitiation" of DesignWare Cores
> Ethernet PCS (version 3.20a) and custom design manual, do the following
> configuration when the interface mode is SGMII.
> 
> 1. program VR_MII_AN_CTRL bit(3) [TX_CONFIG] = 1b (PHY side SGMII)
> 2. program VR_MII_AN_CTRL bit(8) [MII_CTRL] = 1b (8-bit MII)
> 3. program VR_MII_DIG_CTRL1 bit(0) [PHY_MODE_CTRL] = 1b

I'm confused by "PHY side SGMII" - what does this mean for the
transmitted 16-bit configuration word? Does it mean that _this_ side
is acting as if it were a PHY?

Thanks.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!