From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by dpdk.org (Postfix) with ESMTP id 629A65B20 for ; Mon, 1 Apr 2019 20:20:44 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 01 Apr 2019 11:20:43 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,297,1549958400"; d="scan'208";a="334010064" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.46]) ([10.237.221.46]) by fmsmga005.fm.intel.com with ESMTP; 01 Apr 2019 11:20:41 -0700 To: Jerin Jacob Kollanukkaran , "kkokkilagadda@caviumnetworks.com" Cc: "Kiran.Kokkilagadda@cavium.com" , "Jerin.JacobKollanukkaran@cavium.com" , "dev@dpdk.org" , "anatoly.burakov@intel.com" , "hemant.agrawal@nxp.com" , "jianfeng.tan@intel.com" References: <20180927104846.16356-1-kkokkilagadda@caviumnetworks.com> <3a8f29ca-a9e5-f4a8-742e-f21f2c8d0065@intel.com> <9a29584c5ef02ac205dd74b5e3ce963cb02a7c71.camel@marvell.com> From: Ferruh Yigit Openpgp: preference=signencrypt Autocrypt: addr=ferruh.yigit@intel.com; prefer-encrypt=mutual; keydata= mQINBFXZCFABEADCujshBOAaqPZpwShdkzkyGpJ15lmxiSr3jVMqOtQS/sB3FYLT0/d3+bvy qbL9YnlbPyRvZfnP3pXiKwkRoR1RJwEo2BOf6hxdzTmLRtGtwWzI9MwrUPj6n/ldiD58VAGQ +iR1I/z9UBUN/ZMksElA2D7Jgg7vZ78iKwNnd+vLBD6I61kVrZ45Vjo3r+pPOByUBXOUlxp9 GWEKKIrJ4eogqkVNSixN16VYK7xR+5OUkBYUO+sE6etSxCr7BahMPKxH+XPlZZjKrxciaWQb +dElz3Ab4Opl+ZT/bK2huX+W+NJBEBVzjTkhjSTjcyRdxvS1gwWRuXqAml/sh+KQjPV1PPHF YK5LcqLkle+OKTCa82OvUb7cr+ALxATIZXQkgmn+zFT8UzSS3aiBBohg3BtbTIWy51jNlYdy ezUZ4UxKSsFuUTPt+JjHQBvF7WKbmNGS3fCid5Iag4tWOfZoqiCNzxApkVugltxoc6rG2TyX CmI2rP0mQ0GOsGXA3+3c1MCdQFzdIn/5tLBZyKy4F54UFo35eOX8/g7OaE+xrgY/4bZjpxC1 1pd66AAtKb3aNXpHvIfkVV6NYloo52H+FUE5ZDPNCGD0/btFGPWmWRmkPybzColTy7fmPaGz cBcEEqHK4T0aY4UJmE7Ylvg255Kz7s6wGZe6IR3N0cKNv++O7QARAQABtCVGZXJydWggWWln aXQgPGZlcnJ1aC55aWdpdEBpbnRlbC5jb20+iQJVBBMBAgA/AhsDBgsJCAcDAgYVCAIJCgsE FgIDAQIeAQIXgBYhBNI2U4dCLsKE45mBx/kz60PfE2EfBQJbughWBQkHwjOGAAoJEPkz60Pf E2Eft84QAIbKWqhgqRfoiw/BbXbA1+qm2o4UgkCRQ0yJgt9QsnbpOmPKydHH0ixCliNz1J8e mRXCkMini1bTpnzp7spOjQGLeAFkNFz6BMq8YF2mVWbGEDE9WgnAxZdi0eLY7ZQnHbE6AxKL SXmpe9INb6z3ztseFt7mqje/W/6DWYIMnH3Yz9KzxujFWDcq8UCAvPkxVQXLTMpauhFgYeEx Nub5HbvhxTfUkapLwRQsSd/HbywzqZ3s/bbYMjj5JO3tgMiM9g9HOjv1G2f1dQjHi5YQiTZl 1eIIqQ3pTic6ROaiZqNmQFXPsoOOFfXF8nN2zg8kl/sSdoXWHhama5hbwwtl1vdaygQYlmdK H2ueiFh/UvT3WG3waNv2eZiEbHV8Rk52Xyn2w1G90lV0fYC6Ket1Xjoch7kjwbx793Kz/RfQ rmBY8/S4DTGn3oq3dMdQY+b6+7VMUeLMMh2CXYO9ErkOq+qNTD1IY+cBAkXnaDbQfz0zbste ZGWH74FAZ9nCpDOqbRTrBL42aMGhfOWEyeA1x7+hl6JZfabBWAuf4nnCXuorKHzBXTrf7u7p fXsKQClWRW77PF1VmzrtKNVSytQAmlCWApQIw20AarFipXmVdIjHmJPU611WoyxZPb4JTOxx 5cv9B+nr/RIB+v5dcStyHCCwO1be7nBDdCgd4F6kTQPLuQINBFfWTL4BEACnNA29e8TarUsB L5n6eLZHXcFvVwNLVlirWOClHXf44o2KnN3ww+eBEmKVfEFo9MSuGDNHS8Zw1NiGMYxLIUgd U6gGrVVs/VrQWL82pbMk6jCj98N+BXIri+6K1z+AImz7ax7iF1kDgRAnFWU0znWWBgM2mM8Y gDjcxfXk4sCKnvf6Gjo08Ey5zmqx7dekAKU2EEp8Q1EJY3jbymLdZWRP4AFFMTS1rGMk0/tt v71NBg1GobCcbNfn9chK/jhqxYhAJqq86RdJQkt3/9x1U1Oq0vXCt4JVVHmkxePtUiuWTTt+ aYlUAsKYZsWvncExvw77x2ArYDmaK0yfjh37wp0lY7DOJHFxoyT8tyWZlLci/VMRG2Ja33xj 0CN4C1yBg+QDeV3QFxQo42iA/ykdXPUR3ezmsND3XKvVLTC4DNb3V/EZQ7jBj64+bEK0VW4G B31VP00ApNQvSoczsIOAKdk97RNbpmPw6q10ILIB+9T1xbnFYzshzGF17oC0/GENIHATx8vZ masOZoDiOZQpeneLgnFE9JfzhLTxv6wNZcc/HLXRQVTkDsQr8ERtkAoHCf1E5+b5Yr7pfnE4 YuhET746o25S53ELUYPIs49qoJsEJL34/oexMfPGyPIlrbufiNyty5jc/1MRwUlhJlJ5IOHy ZUa+6CLR7GdImusFkPJUJwARAQABiQI8BBgBAgAmAhsMFiEE0jZTh0IuwoTjmYHH+TPrQ98T YR8FAlu6CHAFCQXE7zIACgkQ+TPrQ98TYR9nXxAAqNBgkYNyGuWUuy0GwDQCbu3iiMyH1+D7 llafPcK4NYy1Z4AYuVwC9nmLaoj+ozdqS3ncRo57ncRsKEJC46nDJJZYZ5LSJVn63Y3NBF86 lxQAgjj2oyZEwaLKtKbAFsXL43jv1pUGgSvWwYtDwHITXXFQto9rZEuUDRFSx4sg9OR+Q6/6 LY+nQQ3OdHlBkflzYMPcWgDcvcTAO6yasLEUf7UcYoSWTyMYjLB4QuNlXzTswzGVMssJF/vo V8lD1eqqaSUWG3STF6GVLQOr1NLvN5+kUBiEStHFxBpgSCvYY9sNV8FS6N24CAWMBl+10W+D 2h1yiiP5dOdPcBDYKsgqDD91/sP0WdyMJkwdQJtD49f9f+lYloxHnSAxMleOpyscg1pldw+i mPaUY1bmIknLhhkqfMmjywQOXpac5LRMibAAYkcB8v7y3kwELnt8mhqqZy6LUsqcWygNbH/W K3GGt5tRpeIXeJ25x8gg5EBQ0Jnvp/IbBYQfPLtXH0Myq2QuAhk/1q2yEIbVjS+7iowEZNyE 56K63WBJxsJPB2mvmLgn98GqB4G6GufP1ndS0XDti/2K0o8rep9xoY/JDGi0n0L0tk9BHyoP Y7kaEpu7UyY3nVdRLe5H1/MnFG8hdJ97WqnPS0buYZlrbTV0nRFL/NI2VABl18vEEXvNQiO+ vM8= Message-ID: Date: Mon, 1 Apr 2019 19:20:41 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <9a29584c5ef02ac205dd74b5e3ce963cb02a7c71.camel@marvell.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [dpdk-dev] [PATCH] kni: add IOVA va support for kni 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: Mon, 01 Apr 2019 18:20:44 -0000 On 4/1/2019 6:30 PM, Jerin Jacob Kollanukkaran wrote: > On Tue, 2018-10-02 at 18:05 +0100, Ferruh Yigit wrote: >> On 9/27/2018 11:49 AM, Kiran Kumar wrote: >>> With current KNI implementation kernel module will work only in >>> IOVA=PA mode. This patch will add support for kernel module to work >>> with IOVA=VA mode. >>> >>> The idea is to maintain a mapping in KNI module between user pages >>> and >>> kernel pages and in fast path perform a lookup in this table and >>> get >>> the kernel virtual address for corresponding user virtual address. >>> >>> In IOVA=VA mode, the memory allocated to the pool is physically >>> and virtually contiguous. We will take advantage of this and create >>> a >>> mapping in the kernel.In kernel we need mapping for queues >>> (tx_q, rx_q,... slow path) and mbuf memory (fast path). >>> >>> At the KNI init time, in slow path we will create a mapping for the >>> queues and mbuf using get_user_pages similar to af_xdp. Using pool >>> memory base address, we will create a page map table for the mbuf, >>> which we will use in the fast path for kernel page translation. >>> >>> At KNI init time, we will pass the base address of the pool and >>> size of >>> the pool to kernel. In kernel, using get_user_pages API, we will >>> get >>> the pages with size PAGE_SIZE and store the mapping and start >>> address >>> of user space in a table. >>> >>> In fast path for any user address perform PAGE_SHIFT >>> (user_addr >> PAGE_SHIFT) and subtract the start address from this >>> value, >>> we will get the index of the kernel page with in the page map >>> table. >>> Adding offset to this kernel page address, we will get the kernel >>> address >>> for this user virtual address. >>> >>> For example user pool base address is X, and size is S that we >>> passed to >>> kernel. In kernel we will create a mapping for this using >>> get_user_pages. >>> Our page map table will look like [Y, Y+PAGE_SIZE, Y+(PAGE_SIZE*2) >>> ....] >>> and user start page will be U (we will get it from X >> >>> PAGE_SHIFT). >>> >>> For any user address Z we will get the index of the page map table >>> using >>> ((Z >> PAGE_SHIFT) - U). Adding offset (Z & (PAGE_SIZE - 1)) to >>> this >>> address will give kernel virtual address. >>> >>> Signed-off-by: Kiran Kumar >> >> Hi Kiran, >> >> Thanks for the patch but it was later for this release, missed >> proposal deadline >> etc.. Taking the time remaining for integration deadline, this patch >> will be >> considered for next release. > > Hi Ferruh, > > This patch submitted in Oct last year. Could you please review this? > This feature was added based on community request to support IOVA for > KNI as Initial IOVA support doesn;t have KNI support. > Hi Jerin, I will check it, I remember the request, thanks for the patch. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by dpdk.space (Postfix) with ESMTP id 6471AA0679 for ; Mon, 1 Apr 2019 20:20:46 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 37F1F5B3E; Mon, 1 Apr 2019 20:20:46 +0200 (CEST) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by dpdk.org (Postfix) with ESMTP id 629A65B20 for ; Mon, 1 Apr 2019 20:20:44 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 01 Apr 2019 11:20:43 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,297,1549958400"; d="scan'208";a="334010064" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.46]) ([10.237.221.46]) by fmsmga005.fm.intel.com with ESMTP; 01 Apr 2019 11:20:41 -0700 To: Jerin Jacob Kollanukkaran , "kkokkilagadda@caviumnetworks.com" Cc: "Kiran.Kokkilagadda@cavium.com" , "Jerin.JacobKollanukkaran@cavium.com" , "dev@dpdk.org" , "anatoly.burakov@intel.com" , "hemant.agrawal@nxp.com" , "jianfeng.tan@intel.com" References: <20180927104846.16356-1-kkokkilagadda@caviumnetworks.com> <3a8f29ca-a9e5-f4a8-742e-f21f2c8d0065@intel.com> <9a29584c5ef02ac205dd74b5e3ce963cb02a7c71.camel@marvell.com> From: Ferruh Yigit Openpgp: preference=signencrypt Autocrypt: addr=ferruh.yigit@intel.com; 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WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <9a29584c5ef02ac205dd74b5e3ce963cb02a7c71.camel@marvell.com> Content-Type: text/plain; charset="UTF-8" Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [dpdk-dev] [PATCH] kni: add IOVA va support for kni 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" Message-ID: <20190401182041.dBTeR65kYJc2_CVUBb4uLtKbcDEGRfmLATXteFVX7L0@z> On 4/1/2019 6:30 PM, Jerin Jacob Kollanukkaran wrote: > On Tue, 2018-10-02 at 18:05 +0100, Ferruh Yigit wrote: >> On 9/27/2018 11:49 AM, Kiran Kumar wrote: >>> With current KNI implementation kernel module will work only in >>> IOVA=PA mode. This patch will add support for kernel module to work >>> with IOVA=VA mode. >>> >>> The idea is to maintain a mapping in KNI module between user pages >>> and >>> kernel pages and in fast path perform a lookup in this table and >>> get >>> the kernel virtual address for corresponding user virtual address. >>> >>> In IOVA=VA mode, the memory allocated to the pool is physically >>> and virtually contiguous. We will take advantage of this and create >>> a >>> mapping in the kernel.In kernel we need mapping for queues >>> (tx_q, rx_q,... slow path) and mbuf memory (fast path). >>> >>> At the KNI init time, in slow path we will create a mapping for the >>> queues and mbuf using get_user_pages similar to af_xdp. Using pool >>> memory base address, we will create a page map table for the mbuf, >>> which we will use in the fast path for kernel page translation. >>> >>> At KNI init time, we will pass the base address of the pool and >>> size of >>> the pool to kernel. In kernel, using get_user_pages API, we will >>> get >>> the pages with size PAGE_SIZE and store the mapping and start >>> address >>> of user space in a table. >>> >>> In fast path for any user address perform PAGE_SHIFT >>> (user_addr >> PAGE_SHIFT) and subtract the start address from this >>> value, >>> we will get the index of the kernel page with in the page map >>> table. >>> Adding offset to this kernel page address, we will get the kernel >>> address >>> for this user virtual address. >>> >>> For example user pool base address is X, and size is S that we >>> passed to >>> kernel. In kernel we will create a mapping for this using >>> get_user_pages. >>> Our page map table will look like [Y, Y+PAGE_SIZE, Y+(PAGE_SIZE*2) >>> ....] >>> and user start page will be U (we will get it from X >> >>> PAGE_SHIFT). >>> >>> For any user address Z we will get the index of the page map table >>> using >>> ((Z >> PAGE_SHIFT) - U). Adding offset (Z & (PAGE_SIZE - 1)) to >>> this >>> address will give kernel virtual address. >>> >>> Signed-off-by: Kiran Kumar >> >> Hi Kiran, >> >> Thanks for the patch but it was later for this release, missed >> proposal deadline >> etc.. Taking the time remaining for integration deadline, this patch >> will be >> considered for next release. > > Hi Ferruh, > > This patch submitted in Oct last year. Could you please review this? > This feature was added based on community request to support IOVA for > KNI as Initial IOVA support doesn;t have KNI support. > Hi Jerin, I will check it, I remember the request, thanks for the patch.