From 39922c470e3ce7dcb00910e8f821b7fdd718c3b5 Mon Sep 17 00:00:00 2001 From: Jeff Guo Date: Sun, 22 Jan 2017 10:03:41 +0800 Subject: [PATCH] doc: add known uio_pci_generic issue for i40e When bind the "uio_pci_generic" module in X710/XL710/XXV710, the result is failed. The "uio_pci_generic" module is not supported by X710/XL710/XXV710. Signed-off-by: Jeff Guo Acked-by: Jingjing Wu Acked-by: John McNamara --- doc/guides/rel_notes/known_issues.rst | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/doc/guides/rel_notes/known_issues.rst b/doc/guides/rel_notes/known_issues.rst index 3cd4237617..018e999dbc 100644 --- a/doc/guides/rel_notes/known_issues.rst +++ b/doc/guides/rel_notes/known_issues.rst @@ -640,3 +640,29 @@ I40e VF may not receive packets in the promiscuous mode **Driver/Module**: Poll Mode Driver (PMD). + + +uio pci generic module bind failed in X710/XL710/XXV710 +------------------------------------------------------- + +**Description**: + 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). -- 2.20.1