From mboxrd@z Thu Jan 1 00:00:00 1970 From: Qiming Yang Subject: [PATCH v3] doc: add known igb_uio issue for i40e Date: Wed, 19 Apr 2017 12:16:27 +0800 Message-ID: <1492575387-46855-1-git-send-email-qiming.yang@intel.com> References: <1492052913-962-1-git-send-email-qiming.yang@intel.com> Cc: yigit.ferruh@intel.com, Qiming Yang To: dev@dpdk.org Return-path: Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by dpdk.org (Postfix) with ESMTP id 5C1D81077 for ; Wed, 19 Apr 2017 06:20:10 +0200 (CEST) In-Reply-To: <1492052913-962-1-git-send-email-qiming.yang@intel.com> List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" 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 Acked-by Jingjing Wu Acked-by: John McNamara --- 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 ``_. + +**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