From patchwork Thu Jan 19 13:56:12 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Guo, Jia" X-Patchwork-Id: 19815 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 30B58F979; Thu, 19 Jan 2017 14:56:27 +0100 (CET) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by dpdk.org (Postfix) with ESMTP id 99F82F96D for ; Thu, 19 Jan 2017 14:56:25 +0100 (CET) Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 19 Jan 2017 05:56:24 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.33,254,1477983600"; d="scan'208";a="924363063" Received: from jeffguo-s2600wt2.sh.intel.com ([10.239.129.150]) by orsmga003.jf.intel.com with ESMTP; 19 Jan 2017 05:56:22 -0800 From: Jeff Guo To: helin.zhang@intel.com, jingjing.wu@intel.com Cc: dev@dpdk.org, jia.guo@intel.com Date: Thu, 19 Jan 2017 21:56:12 +0800 Message-Id: <1484834172-26890-1-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 --- v4: modify the signed-off name to be consistent. 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..c1e06fc 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). + + +The 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 bind the “uio_pci_generic” module, it 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 + < https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/drivers/pci/quirks.c?id=8bcf4525c5d43306c5fd07e132bc8650e3491aec>`_. + +**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).