[dpdk-dev] [PATCH v2] doc: add known uio_pci_generic issue for i40e

[Jeff Guo <jia.guo@intel.com>]

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

When bind with uio_pci_generic in X710/XL710/XXV710, the result
is failed. uio_pci_generic is not supported by X710/XL710/XXV710.

Signed-off-by: Guo, Jia <jia.guo@intel.com>
---
v2: add X710/XXV710 limitation case
---
 doc/guides/rel_notes/known_issues.rst | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/doc/guides/rel_notes/known_issues.rst b/doc/guides/rel_notes/known_issues.rst
index 3cd4237..1751451 100644
--- a/doc/guides/rel_notes/known_issues.rst
+++ b/doc/guides/rel_notes/known_issues.rst
@@ -640,3 +640,27 @@ I40e VF may not receive packets in the promiscuous mode
 
 **Driver/Module**:
    Poll Mode Driver (PMD).
+
+
+uio_pci_generic bind failed in X710/XL710/XXV710
+-------------------------------------------------------
+
+**Description**:
+   uio_pci_generic is not supported by XL710, since the errata of XL710 that the feature
+   about 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.
+
+**Implication**:
+   When bind uio_pci_generic, the uio_pci_generic probe device and check the Interrupt
+   Status bit related feature of NICs , since it is not supported by X710/XL710/XXV710,
+   so it return failed.
+
+**Resolution/Workaround**:
+   Do not bind to use uio_pci_generic in X710/XL710/XXV710 NICs.
+
+**Affected Environment/Platform**:
+   All.
+
+**Driver/Module**:
+   Poll Mode Driver (PMD).
-- 
2.7.4