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* [dpdk-dev] [PATCH] doc: add known PHY link up issue for i40e
@ 2018-10-11 11:08 Jeff Guo
  2018-10-19 18:05 ` Zhang, Qi Z
                   ` (2 more replies)
  0 siblings, 3 replies; 10+ messages in thread
From: Jeff Guo @ 2018-10-11 11:08 UTC (permalink / raw)
  To: qi.z.zhang, beilei.xing, john.mcnamara, marko.kovacevic
  Cc: jingjing.wu, dev, jia.guo, helin.zhang

When application stop i40e nics and quit itself, if i40e nics be rebinded
from pmd to kernel driver, sometimes PHY can not be link up again any more.

Signed-off-by: Jeff Guo <jia.guo@intel.com>
---
 doc/guides/rel_notes/known_issues.rst | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/doc/guides/rel_notes/known_issues.rst b/doc/guides/rel_notes/known_issues.rst
index 95e4ce6..3378bb7 100644
--- a/doc/guides/rel_notes/known_issues.rst
+++ b/doc/guides/rel_notes/known_issues.rst
@@ -759,3 +759,30 @@ Netvsc driver and application restart
 
 **Driver/Module**:
    ``uio_hv_generic`` module.
+
+
+PHY link up failed when rebind i40e nics to kernel driver
+---------------------------------------------------------
+
+**Description**:
+   When application stop i40e nics and quit itself, if i40e nics be rebinded
+   from pmd to kernel driver, sometimes PHY can not be link up again any more.
+
+**Implication**:
+   when DPDK application quit and invoke the function ``i40e_dev_stop``, I40e
+   pmd will set PHY to be link down. After these unexpected configure which not
+   come from kernel driver, it will encounter link configure failure by using
+   kernel driver config tools ``ifconfig``. It is a known PHY link configure
+   synchronous issue in i40e kernel driver. The fix has been addressed in 2.7.4
+   rc version. So if the i40e kernel driver is < 2.7.4 and before the fix be
+   backported into the privous versions, use these kernel drivers will perhaps
+   have this issue.
+
+**Resolution/Workaround**:
+   If it does not help by re-insmod kernel driver, please reboot system.
+
+**Affected E0nvironment/Platform**:
+   All.
+
+**Driver/Module**:
+   Poll Mode Driver (PMD).
-- 
2.7.4

^ permalink raw reply	[flat|nested] 10+ messages in thread

end of thread, other threads:[~2018-11-16 19:32 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-10-11 11:08 [dpdk-dev] [PATCH] doc: add known PHY link up issue for i40e Jeff Guo
2018-10-19 18:05 ` Zhang, Qi Z
2018-11-08  7:05   ` Guo, Jia
2018-11-08  7:17 ` [dpdk-dev] [PATCH V2] " Jeff Guo
2018-11-08 17:48   ` Zhang, Qi Z
2018-11-09  2:21     ` Jeff Guo
2018-11-09 16:31       ` Zhang, Qi Z
2018-11-16  2:38 ` [dpdk-dev] [PATCH V3] " Jeff Guo
2018-11-16  9:41   ` Kovacevic, Marko
2018-11-16 19:32     ` Zhang, Qi Z

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