netdev - Re: Altera TSE driver not working in 100mbps mode

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Message-ID: <20191203092918.52x3dfuvnryr5kpx@carbon>
Date:   Tue, 3 Dec 2019 11:29:18 +0200
From:   Petko Manolov <petkan@...leusys.com>
To:     Thor Thayer <thor.thayer@...ux.intel.com>
Cc:     netdev@...r.kernel.org
Subject: Re: Altera TSE driver not working in 100mbps mode

All right, the first message got ignored so this is my take two. :)

Has anyone stumbled on the same problem as me?


cheers,
Petko


On 19-11-27 15:54:19, Petko Manolov wrote:
> 	Hi Thor,
> 
> In my effort to move Altera TSE driver from PHYLIB to PHYLINK i ran into a 
> problem.  The driver would not work properly on 100Mbit/s links.  This is true 
> for the original driver in linux-5.4.y as well as for my PHYLINK/SFP enabled 
> version.
> 
> This is a DT fragment of what i've been trying with 5.4.y kernels and the 
> stock driver:
> 
>                 tse_sub_2: ethernet@...0300000 {
>                         status = "disabled";
> 
>                         compatible = "altr,tse-msgdma-1.0";
>                         reg =   <0xc0300000 0x00000400>,
>                                 <0xc0301000 0x00000020>,
>                                 <0xc0302000 0x00000020>,
>                                 <0xc0303000 0x00000008>,
>                                 <0xc0304000 0x00000020>,
>                                 <0xc0305000 0x00000020>;
>                         reg-names = "control_port", "rx_csr", "rx_desc", "rx_resp", "tx_csr", "tx_desc";
>                         interrupt-parent =< &intc >;
>                         interrupts = <0 54 4>, <0 55 4>;
>                         interrupt-names = "rx_irq", "tx_irq";
>                         rx-fifo-depth = <2048>;
>                         tx-fifo-depth = <2048>;
>                         address-bits = <48>;
>                         max-frame-size = <1500>;
>                         local-mac-address = [ 00 0C ED 00 00 06 ];
>                         altr,has-supplementary-unicast;
>                         altr,has-hash-multicast-filter;
>                         phy-handle = <0>;
>                         fixed-link {
>                                 speed = <1000>;
>                                 full-duplex;
>                         };
>                 };
> 
> Trying "speed = <100>;" above also doesn't change much, except that the link is 
> reported (as expected) as 100Mbps.
> 
> With the PHYLINK code the above fragment is pretty much the same except for:
> 
>                         sfp = <&sfp0>;
>                         phy-mode = "sgmii";
>                         managed = "in-band-status";
> 
> Both (old and new) drivers are working fine on 1Gbps links with optics and 
> copper SFPs.  With PHYLINK code (and in auto-negotiation mode) the link speed 
> and duplex is properly detected as 100Mbps.  MAC and PCS also look correctly set 
> up, but the device is still unable to receive or transmit packages.
> 
> 
> Please let me know should you need more details.
> 
> 
> thanks,
> Petko
>