RE: [ethtool PATCH] FW dump support

On Wed, 2011-05-04 at 11:15 -0700, Ajit.Khaparde@Emulex.Com wrote:

________________________________________
From: netdev-owner@vger.kernel.org [netdev-owner@vger.kernel.org] On Behalf Of Ben Hutchings [bhutchings@solarflare.com]
Sent: Wednesday, May 04, 2011 12:40 PM
To: anirban.chakraborty@qlogic.com
Cc: netdev@vger.kernel.org; --no-chain-reply-to@mv.qlogic.com; davem@davemloft.net
Subject: Re: [ethtool PATCH] FW dump support

quoted

On Mon, 2011-05-02 at 16:29 -0700, anirban.chakraborty@qlogic.com wrote:

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From: Anirban Chakraborty <redacted>

Added support to take FW dump via ethtool.

[...]

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--- a/ethtool.c
+++ b/ethtool.c

[...]

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@@ -263,6 +270,12 @@ static struct option {
              "Get Rx ntuple filters and actions\n" },
     { "-P", "--show-permaddr", MODE_PERMADDR,
              "Show permanent hardware address" },
+    { "-W", "--get-dump", MODE_GET_DUMP,
+             "Get dump level\n" },
+    { "-Wd", "--get-dump-data", MODE_GET_DUMP_DATA,
+             "Get dump data", "FILENAME " "Name of the dump file\n" },

The short options should only include one letter.  Also the general
pattern is that 'get' options use lower-case letters and 'set' options
use upper-case letters.  No, I'm not sure how best to handle a set of 3
options.  Maybe you can combine --get-dump and --get-dump-data, making
the filename optional?

ethtool already has "-f" option to flash/write the FW image.
Can you use "-F" to get the FW dump data out?
And then may be, these options can be extended to get the get/set dump levels?

Although '-F' would be nicely mnemonic, firmware update and dump are
different enough that I don't think they make sense as a pair.  If a
driver implements both then there is the risk of a typo causing the
firmware image file to be overwritten with a firmware dump.  I also
don't think it's possible to extend the '-f' option without breaking
compatibility with scripts that already use it.

Ben.

-- 
Ben Hutchings, Senior Software Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.