[dpdk-dev] [PATCH v3] doc: add known uio_pci_generic issue for i40e

Jeff Guo jia.guo at intel.com
Thu Jan 19 11:52:11 CET 2017

From: "Guo, Jia" <jia.guo at intel.com>

When bind with 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: Guo, Jia <jia.guo at intel.com>
Acked-by: Jingjing Wu <jingjing.wu at intel.com>
v3: add related linux kernel commit info and fix some syntax issues
v2: add X710/XXV710 limitation case
 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 3cd4237..8b083a0 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
    Poll Mode Driver (PMD).
+The uio_pci_generic module bind failed in X710/XL710/XXV710
+   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
+   <http://www.intel.com/content/www/us/en/embedded/products/networking/xl710-10-40-controller-spec-update.html>`_.
+   The hw limitation is the same as other X710/XXV710 NICs.
+   When bind the “uio_pci_generic” module, it probe 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
+   < https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/drivers/pci/quirks.c?id=8bcf4525c5d43306c5fd07e132bc8650e3491aec>`_.
+   Do not bind to use the “uio_pci_generic” module in X710/XL710/XXV710 NICs.
+**Affected Environment/Platform**:
+   All.
+   Poll Mode Driver (PMD).

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