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staging/rdma/hfi1: Add active and optical cable support

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This patch qualifies and tunes active and optical cables for optimal
bit error rate and signal integrity settings. These settings are
fetched from the platform configuration data.

Based on attributes of the QSFP cable as read from the SFF-8636
compliant memory map, we select the appropriate settings from the
platform configuration data (examples: TX/RX equalization, enabling
cable high power, enabling TX/RX clock data recovery mechanisms, and RX
amplitude control) and apply them to the SERDES and QSFP cable.

The platform configuration data also contains system parameters such
as maximum power dissipation supported, and the cables are qualified
based on these parameters. As part of qualifying the cables, the
correct OfflineDisabledReasons are set for the appropriate scenarios.

Reviewed-by: Dean Luick <dean.luick@intel.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Brent R Rothermel <brent.r.rothermel@intel.com>
Signed-off-by: Easwar Hariharan <easwar.hariharan@intel.com>
Signed-off-by: Jubin John <jubin.john@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Easwar Hariharan 2016-02-03 14:31:14 -08:00 • committed by Doug Ledford
commit 8ebd4cf185
9 changed files with 1302 additions and 444 deletions
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