[dpdk-dev] [Bug 24] Ixgbe driver sets unknown bit of the 82599's SW_FW_SYNC register

[bugzilla at dpdk.org]

https://dpdk.org/tracker/show_bug.cgi?id=24

            Bug ID: 24
           Summary: Ixgbe driver sets unknown bit of the 82599's
                    SW_FW_SYNC register
           Product: DPDK
           Version: unspecified
          Hardware: All
                OS: All
            Status: CONFIRMED
          Severity: minor
          Priority: Normal
         Component: ethdev
          Assignee: dev at dpdk.org
          Reporter: solal.pirelli at gmail.com
  Target Milestone: ---

The Intel 82599 data sheet
(https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/82599-10-gbe-controller-datasheet.pdf,
§8.2.3.4.11) lists the bits of the SW_FW_SYNC (a.k.a. GSSR) register. Notably,
there are only 10 used bits, none of which are management-related.

The ixgbe driver attempts to set bit 10 in ixgbe_swfw_lock_reset
(http://dpdk.org/browse/dpdk/tree/drivers/net/ixgbe/ixgbe_ethdev.c?h=v18.02#n1087),
which does not exist on the 82599.

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