netdev - Re: Optics (SFP) monitoring on ixgbe and igbe

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Message-ID: <CAPN4dA-moLxn_jQW4e906j9wLU+tZVLxvkWeLOxDEbZpGtJ28g@mail.gmail.com>
Date:	Thu, 15 Nov 2012 22:36:47 +0100
From:	Aurélien <footplus@...il.com>
To:	Ben Hutchings <bhutchings@...arflare.com>
Cc:	netdev@...r.kernel.org
Subject: Re: Optics (SFP) monitoring on ixgbe and igbe

> On Fri, Nov 9, 2012 at 4:08 PM, Ben Hutchings <bhutchings@...arflare.com> wrote:
>>
>> No, the driver also needs to implement ethtool_ops::get_module_info and
>> ethtool_ops::get_module_eeprom.  But those should be quite easy to do.
>>

Hi !

I started to implement these operations in ixgbe.

So far, the result is the attached patch, which applies on dave-m's
net-next @ 1ff05fb7114a6b4118e0f7d89fed2659f7131b0a. It's not yet
finished, and since it is my first peek at network drivers I need some
advice on:

- whether the implementation seems correct for ixgbe and all its
supported MAC/PHY combinations ?
- what would be the best way to manage SFF-8472 A0/A2 bank swapping
mechanism for reading A2h ? (it seems I need to lock the whole -
adress change sequence - read A2h - address change again - operation)
in case it's needed. I may not be able to test that, so I may add an
unsupported return code for now.
- Is the supported PHY selection correct, or should other PHYs be
supported ? What should be the rule ?

I have been able to get correct temperature readings with a patched-up
ethtool, so it seems to work correctly on at least my card (Ethernet
controller [0200]: Intel Corporation 82599EB 10-Gigabit Network
Connection [8086:10fb] (rev 01)).

About ethtool, I was thinking about making a -O option for optical
diagnostics, which would have a readable output. I will make a
function to parse the A2 register contents, so it can be reused in
other daemons/libs (SNMP, etc).

Thanks,
Best regards,
-- 
Aurélien Guillaume

Download attachment "ixgbe-sff8472.patch" of type "application/octet-stream" (11887 bytes)