From patchwork Sun Jan 22 02:03:41 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Guo, Jia" X-Patchwork-Id: 19860 X-Patchwork-Delegate: ferruh.yigit@amd.com Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [IPv6:::1]) by dpdk.org (Postfix) with ESMTP id B37522BE9; Sun, 22 Jan 2017 03:03:57 +0100 (CET) Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by dpdk.org (Postfix) with ESMTP id E333B293C for ; Sun, 22 Jan 2017 03:03:55 +0100 (CET) Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga105.fm.intel.com with ESMTP; 21 Jan 2017 18:03:54 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.33,267,1477983600"; d="scan'208";a="56728458" Received: from jeffguo-s2600wt2.sh.intel.com ([10.239.129.150]) by fmsmga006.fm.intel.com with ESMTP; 21 Jan 2017 18:03:53 -0800 From: Jeff Guo To: helin.zhang@intel.com, jingjing.wu@intel.com Cc: dev@dpdk.org, Jeff Guo Date: Sun, 22 Jan 2017 10:03:41 +0800 Message-Id: <1485050621-87020-1-git-send-email-jia.guo@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1484823403-24868-1-git-send-email-jia.guo@intel.com> References: <1484823403-24868-1-git-send-email-jia.guo@intel.com> MIME-Version: 1.0 Subject: [dpdk-dev] [PATCH v4] doc: add known uio_pci_generic issue for i40e X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list 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 bind 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: Jeff Guo Acked-by: Jingjing Wu Acked-by: John McNamara --- v4: modify the signed-off name to be consistent and fix make doc issue. 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..018e999 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 **Driver/Module**: Poll Mode Driver (PMD). + + +uio pci generic module bind failed in X710/XL710/XXV710 +------------------------------------------------------- + +**Description**: + 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 + `_. + The hw limitation is the same as other X710/XXV710 NICs. + +**Implication**: + When use ``--bind=uio_pci_generic``, the ``uio_pci_generic`` module probes 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 + `_. + +**Resolution/Workaround**: + Do not bind the ``uio_pci_generic`` module in X710/XL710/XXV710 NICs. + +**Affected Environment/Platform**: + All. + +**Driver/Module**: + Poll Mode Driver (PMD).