[DPDK/ethdev Bug 1647] uio_pci_generic module bind failed in X710/XL710/XXV710

[DPDK/ethdev Bug 1647] uio_pci_generic module bind failed in X710/XL710/XXV710

[bugzilla]

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https://bugs.dpdk.org/show_bug.cgi?id=1647

            Bug ID: 1647
           Summary: uio_pci_generic module bind failed in
                    X710/XL710/XXV710
           Product: DPDK
           Version: unspecified
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: ethdev
          Assignee: dev@dpdk.org
          Reporter: nandinipersad361@gmail.com
  Target Milestone: ---

The uio_pci_generic module is not supported by XL710, since the errata of XL710
states that the Interrupt Status bit is not implemented. The errata is the item
#71 from the xl710 controller spec. The hw limitation is the same as other
X710/XXV710 NICs.

Implication:
When use --bind=uio_pci_generic, the uio_pci_generic module probes device and
check the Interrupt Status bit. Since it is not supported by X710/XL710/XXV710,
it return a failed value. The statement that these products don’t support INTx
masking, is indicated in the related linux kernel commit.

Resolution/Workaround:
Do not bind the uio_pci_generic module in X710/XL710/XXV710 NICs.

Affected Environment/Platform:
All.

Driver/Module:
Poll Mode Driver (PMD).

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