From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by dpdk.org (Postfix) with ESMTP id A827D1B139 for ; Sun, 30 Sep 2018 04:25:25 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Sep 2018 19:25:24 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,322,1534834800"; d="scan'208";a="77227309" Received: from fmsmsx107.amr.corp.intel.com ([10.18.124.205]) by orsmga007.jf.intel.com with ESMTP; 29 Sep 2018 19:24:46 -0700 Received: from fmsmsx117.amr.corp.intel.com (10.18.116.17) by fmsmsx107.amr.corp.intel.com (10.18.124.205) with Microsoft SMTP Server (TLS) id 14.3.319.2; Sat, 29 Sep 2018 19:24:46 -0700 Received: from shsmsx151.ccr.corp.intel.com (10.239.6.50) by fmsmsx117.amr.corp.intel.com (10.18.116.17) with Microsoft SMTP Server (TLS) id 14.3.319.2; Sat, 29 Sep 2018 19:24:45 -0700 Received: from shsmsx103.ccr.corp.intel.com ([169.254.4.245]) by SHSMSX151.ccr.corp.intel.com ([169.254.3.27]) with mapi id 14.03.0319.002; Sun, 30 Sep 2018 10:24:43 +0800 From: "Zhang, Qi Z" To: "Li, Xiaoyun" , "Xing, Beilei" , "dev@dpdk.org" , "Lu, Wenzhuo" , "Wu, Jingjing" Thread-Topic: [PATCH] doc: add known issue about legacy intr mode for ixgbe Thread-Index: AQHUVkUpJMvHwZTUtkGbJW5kU0dD86UIG7hg Date: Sun, 30 Sep 2018 02:24:43 +0000 Message-ID: <039ED4275CED7440929022BC67E70611532A8371@SHSMSX103.ccr.corp.intel.com> References: <1538039797-43828-1-git-send-email-xiaoyun.li@intel.com> In-Reply-To: <1538039797-43828-1-git-send-email-xiaoyun.li@intel.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-titus-metadata-40: eyJDYXRlZ29yeUxhYmVscyI6IiIsIk1ldGFkYXRhIjp7Im5zIjoiaHR0cDpcL1wvd3d3LnRpdHVzLmNvbVwvbnNcL0ludGVsMyIsImlkIjoiYTgwMDgxYTAtMTk3MC00ZWZhLWE0MGQtMTBhMTViZmI4MjkyIiwicHJvcHMiOlt7Im4iOiJDVFBDbGFzc2lmaWNhdGlvbiIsInZhbHMiOlt7InZhbHVlIjoiQ1RQX05UIn1dfV19LCJTdWJqZWN0TGFiZWxzIjpbXSwiVE1DVmVyc2lvbiI6IjE3LjEwLjE4MDQuNDkiLCJUcnVzdGVkTGFiZWxIYXNoIjoiM2czXC9YRVBVS2RtR1huekRyaXBHcU95SGtiTW5oQlwvY2pcL1FDNXFlc09DMDFXNEp0WG8wZDNkZXlieVFSSUpoQyJ9 x-ctpclassification: CTP_NT dlp-product: dlpe-windows dlp-version: 11.0.400.15 dlp-reaction: no-action x-originating-ip: [10.239.127.40] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Subject: Re: [dpdk-dev] [PATCH] doc: add known issue about legacy intr mode for ixgbe 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: , X-List-Received-Date: Sun, 30 Sep 2018 02:25:26 -0000 > -----Original Message----- > From: Li, Xiaoyun > Sent: Thursday, September 27, 2018 5:17 PM > To: Xing, Beilei ; Zhang, Qi Z ; > dev@dpdk.org; Lu, Wenzhuo ; Wu, Jingjing > > Cc: Li, Xiaoyun > Subject: [PATCH] doc: add known issue about legacy intr mode for ixgbe >=20 > When using uio_pci_generic module or using legacy interrupt mode of igb_u= io > or vfio, X550 cannot get interrupts. Because the Interrupt Status bit is = not > implemented, then the irq cannot be handled correctly and cannot report t= he > event fd to DPDK apps. >=20 > Add this hw limitation and details into ixgbe known issue. >=20 > Signed-off-by: Xiaoyun Li > --- > doc/guides/nics/ixgbe.rst | 26 ++++++++++++++++++++++++++ > 1 file changed, 26 insertions(+) >=20 > diff --git a/doc/guides/nics/ixgbe.rst b/doc/guides/nics/ixgbe.rst index > 16d6390..4f89a6d 100644 > --- a/doc/guides/nics/ixgbe.rst > +++ b/doc/guides/nics/ixgbe.rst > @@ -200,6 +200,32 @@ There is no RTE API to add a VF's MAC address from > the PF. On ixgbe, the ``rte_eth_dev_mac_addr_add()`` function can be use= d > to add a VF's MAC address, as a workaround. >=20 > +legacy interrupt mode and uio pci generic module cannot be used in X550 > +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > ~~~~~~~ the reason we can't use uio_pci_generic, is it also because uio_pci_generic= require legacy mode? If it is, can we simplified the title as " x550 does not support legacy int= errupt mode" > + > +Desccription > +^^^^^^^^^^^^ > +X550 cannot get interrupts if using ``uio_pci_generic`` module or using > +legacy interrupt mode of ``igb_uio`` or ``vfio``. Because the errata of > +X550 states that the Interrupt Status bit is not implemented. The > +errata is the item #22 from `X550 spec update > + heet > +s/ethernet-x550-spec-update.pdf>`_ Seems the url here is not correct, there is no errata item #22 Regards Qi > + > +Implication > +^^^^^^^^^^^ > +When using ``uio_pci_generic`` module or using legacy interrupt mode of > +``igb_uio`` or ``vfio``, the Interrupt Status bit would be checked if > +the interrupt is comming. Since the bit is not implemented in X550, the > +irq cannot be handled correctly and cannot report the event fd to DPDK > +apps. Then apps cannot get interrupts and ``dmesg`` will show messages > +like ``irq #No.: `` ``nobody cared.`` > + > +Workaround > +^^^^^^^^^^ > +Do not bind the ``uio_pci_generic`` module in X550 NICs. > +Do not bind ``igb_uio`` with legacy mode in X550 NICs. > +Before using ``vfio`` with legacy mode in X550 NICs, using ``modprobe > +vfio `` ``nointxmask=3D1`` to bind ``vfio``. >=20 > Inline crypto processing support > -------------------------------- > -- > 2.7.4