From: Qiming Yang <qiming.yang@intel.com>
To: dev@dpdk.org
Cc: yigit.ferruh@intel.com, Qiming Yang <qiming.yang@intel.com>
Subject: [dpdk-dev] [PATCH v3] doc: add known igb_uio issue for i40e
Date: Wed, 19 Apr 2017 12:16:27 +0800 [thread overview]
Message-ID: <1492575387-46855-1-git-send-email-qiming.yang@intel.com> (raw)
In-Reply-To: <1492052913-962-1-git-send-email-qiming.yang@intel.com>
When insmod "igb_uio" with "intr_mode=legacy and test link
status interrupt. Since INTx interrupt is not supported by
X710/XL710/XXV710, it will cause Input/Output error when
reading file descriptor.
Signed-off-by: Qiming Yang <qiming.yang@intel.com>
Acked-by Jingjing Wu <jingjing.wu@intel.com>
Acked-by: John McNamara <john.mcnamara@intel.com>
---
v2 changes:
* move the description to rel_notes/known_issues.rst
v3 changes:
* fixed a doc build warning
---
---
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 f149ac7..a5592b0 100644
--- a/doc/guides/rel_notes/known_issues.rst
+++ b/doc/guides/rel_notes/known_issues.rst
@@ -697,3 +697,27 @@ virtio tx_burst() function cannot do TSO on shared packets
**Driver/Module**:
Poll Mode Driver (PMD).
+
+
+igb uio legacy mode can not be used in X710/XL710/XXV710
+--------------------------------------------------------
+
+**Description**:
+ X710/XL710/XXV710 NICs lack support for indicating INTx is asserted via the interrupt
+ bit in the PCI status register. Linux delected them from INTx support table. The related
+ link `<https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/drivers/pci/quirks.c?id=8bcf4525c5d43306c5fd07e132bc8650e3491aec>`_.
+
+**Implication**:
+ When insmod ``igb_uio`` with ``intr_mode=legacy`` and test link status interrupt. Since
+ INTx interrupt is not supported by X710/XL710/XXV710, it will cause Input/Output error
+ when reading file descriptor.
+
+**Resolution/Workaround**:
+ Do not bind ``igb_uio`` with legacy mode in X710/XL710/XXV710 NICs, or do not use kernel
+ version >4.7 when you bind ``igb_uio`` with legacy mode.
+
+**Affected Environment/Platform**:
+ ALL.
+
+**Driver/Module**:
+ Poll Mode Driver (PMD).
--
2.4.11
next prev parent reply other threads:[~2017-04-19 4:20 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-27 9:16 [dpdk-dev] [PATCH] " Qiming Yang
2017-03-30 12:08 ` Wu, Jingjing
2017-04-03 10:40 ` Ferruh Yigit
2017-04-03 13:30 ` Mcnamara, John
2017-04-13 3:08 ` [dpdk-dev] [PATCH v2] " Qiming Yang
2017-04-14 16:03 ` Mcnamara, John
2017-04-14 16:53 ` Ferruh Yigit
2017-04-19 4:16 ` Qiming Yang [this message]
2017-04-19 10:06 ` [dpdk-dev] [PATCH v3] " Ferruh Yigit
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