linux-kernel - RE: [EXT] Re: [PATCH v4 net-next 19/19] net: mvpp2: add TX FC firmware check

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Message-ID: <CO6PR18MB3873983229F0F664A0578A3DB0BB9@CO6PR18MB3873.namprd18.prod.outlook.com>
Date:   Wed, 27 Jan 2021 15:10:11 +0000
From:   Stefan Chulski <stefanc@...vell.com>
To:     Russell King - ARM Linux admin <linux@...linux.org.uk>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "thomas.petazzoni@...tlin.com" <thomas.petazzoni@...tlin.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        Nadav Haklai <nadavh@...vell.com>,
        Yan Markman <ymarkman@...vell.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "mw@...ihalf.com" <mw@...ihalf.com>,
        "andrew@...n.ch" <andrew@...n.ch>,
        "atenart@...nel.org" <atenart@...nel.org>
Subject: RE: [EXT] Re: [PATCH v4 net-next 19/19] net: mvpp2: add TX FC
 firmware check



> -----Original Message-----
> From: Russell King - ARM Linux admin <linux@...linux.org.uk>
> Sent: Wednesday, January 27, 2021 5:00 PM
> To: Stefan Chulski <stefanc@...vell.com>
> Cc: netdev@...r.kernel.org; thomas.petazzoni@...tlin.com;
> davem@...emloft.net; Nadav Haklai <nadavh@...vell.com>; Yan
> Markman <ymarkman@...vell.com>; linux-kernel@...r.kernel.org;
> kuba@...nel.org; mw@...ihalf.com; andrew@...n.ch;
> atenart@...nel.org
> Subject: Re: [EXT] Re: [PATCH v4 net-next 19/19] net: mvpp2: add TX FC
> firmware check
> 
> On Wed, Jan 27, 2021 at 02:37:34PM +0000, Stefan Chulski wrote:
> > Your mcbin-ss is A8K AX or A8K B0? On AX revisions we do not have FC
> support in firmware.
> 
> How do I tell? I don't want to remove the heatsink, and I don't see anything
> in MV-S111188-00E. I didn't grab a copy of the Errata before I accidentally let
> me extranet access expire.

You can devmem 0xF2400240(Device ID Status Register).
#define A8040_B0_DEVICE_ID      0x8045
#define A8040_AX_DEVICE_ID      0x8040
#define A7040_B0_DEVICE_ID      0x7045
#define A7040_AX_DEVICE_ID      0x7040
#define A3900_A1_DEVICE_ID      0x6025
#define CN9130_DEVICE_ID        0x7025

Regards.