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Date:   Sun, 23 Aug 2020 17:54:07 +0200
From:   Michal Kubecek <>
To:     Adrian Pop <>
Subject: Re: [PATCH ethtool v5] Add QSFP-DD support

On Thu, Aug 13, 2020 at 06:08:26PM +0300, Adrian Pop wrote:
> The Common Management Interface Specification (CMIS) for QSFP-DD shares
> some similarities with other form factors such as QSFP or SFP, but due to
> the fact that the module memory map is different, the current ethtool
> version is not able to provide relevant information about an interface.
> This patch adds QSFP-DD support to ethtool. The changes are similar to
> the ones already existing in qsfp.c, but customized to use the memory
> addresses and logic as defined in the specifications document.
> Several functions from qsfp.c could be reused, so an additional parameter
> was added to each and the functions were moved to sff-common.c.
> Diff from v1:
> * Report cable length in meters instead of kilometers
> * Fix bad value for QSFP_DD_DATE_VENDOR_LOT_OFFSET
> * Fix initialization for struct qsfp_dd_diags
> * Remove unrelated whitespace cleanups in qsfp.c and
> Diff from v2:
> * Remove functions assuming the existance of page 0x10 and 0x11
> * Remove structs and constants related to the page 0x10 and 0x11
> Diff from v3:
> * Added missing Signed-off-by and Tested-by tags
> Diff from v4:
> * Fix whitespace formatting problems
> Signed-off-by: Adrian Pop <>
> Tested-by: Ido Schimmel <>
> Reviewed-by: Andrew Lunn <>

Applied, thank you.


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