netdev - Re: Marvell phy errata origins?

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Date:   Thu, 4 Oct 2018 07:27:37 +0000
From:   "GokulChand Casheekar (gcasheek)" <gcasheek@...co.com>
To:     "Daniel Walker (danielwa)" <danielwa@...co.com>,
        Harini Katakam <harinik@...inx.com>,
        Andrew Lunn <andrew@...n.ch>
CC:     Florian Fainelli <f.fainelli@...il.com>,
        "afleming@...escale.com" <afleming@...escale.com>,
        Harini Katakam <harini.katakam@...inx.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "HEMANT RAMDASI (hramdasi)" <hramdasi@...co.com>,
        "Julius Hemanth Pitti -X (jpitti - MONTA VISTA SOFTWARE INC at Cisco)" 
        <jpitti@...co.com>, "David Beazley (dbeazley)" <dbeazley@...co.com>
Subject: Re: Marvell phy errata origins?

The phy_id where I see the interrupt storm is :
0x01410cc2

Regards,

Gokul.

On 01/10/18, 3:56 PM, "GokulChand Casheekar (gcasheek)" <gcasheek@...co.com> wrote:

    Sorry - I was sick and out of office.
    The phy_id reads 0x01410cc1. 
    
    Regards,
    
    Gokul.
    On 26/09/18, 9:05 PM, "Daniel Walker (danielwa)" <danielwa@...co.com> wrote:
    
        On 09/25/2018 10:42 PM, Harini Katakam wrote:
        > Hi,
        > On Tue, Sep 25, 2018 at 11:00 PM Harini Katakam <harinik@...inx.com> wrote:
        >>
        >> Hi Daniel,
        >>
        >> On Tue, Sep 25, 2018 at 9:10 PM Andrew Lunn <andrew@...n.ch> wrote:
        >>>
        >>>> I hope this this thread isn't too old to bring back to life. So it seems
        >>>> that Harini found that m88e1111 did not need this errata, and Cisco
        >>>> previously found that Harini's patch fixed m88e1112, we included it
        >>>> internally for that reason
        >>>>
        >>>> Now I'm getting reports that this errata fixes issues we're seeing on
        >>>> m88e1111. We see an interrupt storm without the errata, despite the errata
        >>>> not being defined in the datasheet.
        >>>
        >>> Is everybody actually using interrupts? It could be in one system
        >>> phylib is polling.
        >>>
        >>
        >> Yes, we weren't using interrupts; we used phy poll.
        >>
        >> As I recall, the register and page combination was reserved and
        >> the access seemed to fail.
        >> It will be useful if we can the errata description or version details.
        >> I'll check if I can get any more information.
        > 
        > One of the PHY parts used was "88E1111-B2-bab1i000"
        
        I doubt I can find this level of detail .. We have many of these 
        machines in the field so they may have different part numbers.
        
        I may have been given some incorrect details on the issue. I'm not 
        currently sure this errata code is related. I'll let you know when I 
        have more information.
        
        Daniel