From patchwork Tue Dec 6 17:18:03 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adam Manzanares X-Patchwork-Id: 9463107 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 643EA60231 for ; Tue, 6 Dec 2016 18:50:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5861A284BD for ; Tue, 6 Dec 2016 18:50:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4C24F284C0; Tue, 6 Dec 2016 18:50:14 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1A74F284BD for ; Tue, 6 Dec 2016 18:50:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751962AbcLFSuM (ORCPT ); Tue, 6 Dec 2016 13:50:12 -0500 Received: from mail-co1nam03on0060.outbound.protection.outlook.com ([104.47.40.60]:52096 "EHLO NAM03-CO1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751166AbcLFSuK (ORCPT ); Tue, 6 Dec 2016 13:50:10 -0500 X-Greylist: delayed 3562 seconds by postgrey-1.27 at vger.kernel.org; Tue, 06 Dec 2016 13:50:09 EST DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sandiskcorp.onmicrosoft.com; s=selector1-sandiskcorp-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=ahEebWpyLTPtr3kpKcdwY1k4J5rSUq+q7LxE6QQ9NW4=; b=qKU5NLDx7YkD6zDB1EEuNFqDYlF/bCIWfs6PxEOwSq+vTjUeoA8gV8cc34d5q7/VW8+cbbPcYLFqAfICVUJPYbQUqt+7VaL8Y/+/cJlpQU4qrrEWDl+9e6uu+xpJfMufDIWV8yoWBO3RfyZW6WghHR2DMuRKb0qmVRgfgAckluc= Received: from CY1PR0201CA0028.namprd02.prod.outlook.com (10.163.30.166) by BN1PR02MB054.namprd02.prod.outlook.com (10.242.210.142) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.761.9; Tue, 6 Dec 2016 17:18:30 +0000 Received: from BY2FFO11FD048.protection.gbl (2a01:111:f400:7c0c::142) by CY1PR0201CA0028.outlook.office365.com (2a01:111:e400:58b9::38) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.721.10 via Frontend Transport; Tue, 6 Dec 2016 17:18:30 +0000 Authentication-Results: spf=fail (sender IP is 63.163.107.21) smtp.mailfrom=wdc.com; sharedspace.mail.onmicrosoft.com; dkim=none (message not signed) header.d=none; sharedspace.mail.onmicrosoft.com; dmarc=none action=none header.from=hgst.com; sharedspace.mail.onmicrosoft.com; dkim=none (message not signed) header.d=none; Received-SPF: Fail (protection.outlook.com: domain of wdc.com does not designate 63.163.107.21 as permitted sender) receiver=protection.outlook.com; client-ip=63.163.107.21; helo=milsmgep15.sandisk.com; Received: from milsmgep15.sandisk.com (63.163.107.21) by BY2FFO11FD048.mail.protection.outlook.com (10.1.15.176) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.734.4 via Frontend Transport; Tue, 6 Dec 2016 17:18:31 +0000 X-IncomingTopHeaderMarker: OriginalChecksum:; UpperCasedChecksum:; SizeAsReceived:3238; Count:18 Received: from MILHUBIP04.sdcorp.global.sandisk.com (Unknown_Domain [10.201.67.162]) (using TLS with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by (Symantec Messaging Gateway) with SMTP id C5.0C.02899.4A0F6485; Tue, 6 Dec 2016 09:08:54 -0800 (PST) Received: from milsmgip11.sandisk.com (10.177.9.6) by MILHUBIP04.sdcorp.global.sandisk.com (10.177.9.97) with Microsoft SMTP Server id 14.3.319.2; Tue, 6 Dec 2016 09:18:28 -0800 X-AuditID: 0ac94369-5f3ff70000000b53-a3-5846f0a4f7b4 Received: from penguito.sdcorp.global.sandisk.com ( [10.177.9.6]) by (Symantec Messaging Gateway) with SMTP id 3F.6C.02804.4E2F6485; Tue, 6 Dec 2016 09:18:28 -0800 (PST) From: Adam Manzanares To: , , , , , , , , CC: , , , Adam Manzanares Subject: [PATCH v7 2/4] ata: Enabling ATA Command Priorities Date: Tue, 6 Dec 2016 09:18:03 -0800 Message-ID: <1481044685-2803-3-git-send-email-adam.manzanares@hgst.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1481044685-2803-1-git-send-email-adam.manzanares@hgst.com> References: <1481044685-2803-1-git-send-email-adam.manzanares@hgst.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprPIsWRmVeSWpSXmKPExsXCddJ5ke6yD24RBmffKFrcPrqDxWL13X42 i59XZrFZTJ96gdFiz6JJTBZ7b2lbHNvxiMni8q45bBbLj/9jslh/ZAOjxa6H39ktfi0/ymjx cMFmdgdej1kNvWweu3Y1snss3vOSyePy2VKPTas62Tw+Pr3F4vF+31U2j0tn21k8Np+u9vi8 SS6AK4rLJiU1J7MstUjfLoEr42/rX9aCWcYVWz/8YW9gXKfZxcjJISFgIvFhyyfGLkYuDiGB pUwS57/8hHK2Mkos3LiRGaZqy9tXbBCJ9YwSF+5NAkpwcLAJGEhMv5wIEhcRuM4o0f35FFgR s0A3o8Tm7w2sIN3CAjYSZ2d/BbNZBFQkbpx4yAhi8wq4S2zeMgdqg5zEzXOdYDangIfEveO9 YDVCQDV3nl8HGyoh8JZVYtP5NqhmQYmTM5+wgNjMAhISB1+8ALtISEBV4vh5wQmMQrOQVM1C UrWAkWkVo1huZk5xbnpqgaGpXnFiXkpmcbZecn7uJkZItGXuYLz7xPsQowAHoxIP74GzbhFC rIllxZW5hxglOJiVRHj5XwGFeFMSK6tSi/Lji0pzUosPMUpzsCiJ87rd+xImJJCeWJKanZpa kFoEk2Xi4JRqYEzo9+0xSZD2E5D4POsM7+PbMfO4nAtrvy8VzG6aNfG/ZX7HtrIdkiEvZqfO uVX48Na06dcY8iemaRcadE/l9Dsw9eqec/nvvj/PLjJ5emHnw5lti4/HBMx/9m+XzEcJG+Ev 32/eNP4dNa3uZfY7NW2R8GOZIg0BresqVyilMnzx3R/IfIlF5YkSS3FGoqEWc1FxIgBVV9j3 sgIAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrJJMWRmVeSWpSXmKPExsXCtZGTTffJJ7cIg89XmSwOrLjJZLH6bj+b xacfL5kspk+9wGixZ9EkJou9t7Qtju14xGRxedccNovlx/8xWaw/soHRYtfD7+wWv5YfZbR4 uGAzuwOvx6yGXjaPU/d3sXjs2tXI7rF4z0smj8tnSz02repk8/j49BaLx/t9V9k8Np+u9vi8 Sc6j/UA3UwB3FJdNSmpOZllqkb5dAlfG39a/rAWzjCu2fvjD3sC4TrOLkZNDQsBEYsvbV2xd jFwcQgJrGSVW73jP2sXIwcEmYCAx/XIiSFxE4DyjxMs538GKmAU6GSX+9k5iA+kWFrCRODv7 KyuIzSKgKvF12XE2kGZeAXeJzrexEAvkJG6e62QGsTkFPCTuHe9lBLGFgEruPL/ONoGRewEj wypGsdzMnOLc9MwCQ0O94sS8lMzibL3k/NxNjJDAjNzB+HSi+SFGJg5OqQbG2lMiFiuMGW13 vUn/OHNaq/Bfb5VPu6TrrQ6uWPz/1bGUpNW/or5yrGezd3+y7/VCx8w+/08ic0+82i+p1xZu 1LB/6sc7ev1XRRvPK7fuXx+1eP2a8JOOatM23L4ja3VY9k1R7NovzE4XJ1ywubybo1v95m3n ewsvHQjzWMkvLW8Zue9Rmq79HiWW4oxEQy3mouJEAN9m1/X8AQAA MIME-Version: 1.0 X-IncomingHeaderCount: 18 X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-Forefront-Antispam-Report: CIP:63.163.107.21; IPV:NLI; CTRY:US; EFV:NLI; SFV:NSPM; SFS:(10009020)(6009001)(7916002)(2980300002)(1110001)(1109001)(339900001)(189002)(199003)(2270400002)(960300001)(8676002)(2950100002)(356003)(42882006)(6666003)(81166006)(81156014)(305945005)(5001770100001)(97736004)(39410400001)(189998001)(38730400001)(33646002)(5660300001)(36756003)(50226002)(77096006)(39450400002)(7846002)(8936002)(2201001)(39860400001)(39850400001)(39840400001)(85426001)(5003940100001)(626004)(47776003)(7416002)(106466001)(50986999)(4326007)(50466002)(48376002)(2906002)(68736007)(105606002)(69596002)(92566002)(76176999); DIR:OUT; SFP:1101; SCL:1; SRVR:BN1PR02MB054; H:milsmgep15.sandisk.com; FPR:; SPF:Fail; PTR:InfoDomainNonexistent; MX:1; A:1; LANG:en; X-Microsoft-Exchange-Diagnostics: 1; BY2FFO11FD048; 1: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 X-MS-Office365-Filtering-Correlation-Id: af108b73-af37-48d5-0ee7-08d41dfbe6cc X-Microsoft-Antispam: UriScan:; BCL:0; PCL:0; RULEID:(22001); SRVR:BN1PR02MB054; X-Microsoft-Exchange-Diagnostics: 1; BN1PR02MB054; 3:jcgChUsTvqU2TDNeXDUGiGJVCQK6sdelMh75qem/yeClkMOLYkuvbcmn0e3qqIU9AdMnQCBgxs6WdM0Dp2CGiTJkcf48FzHdVE8mrIzmlkPW9P4QuY9lEqhRrSvl3jGRwvp/orT4Htqs6oTOIVKmFD3DzlJEdglypWZdwv60xLVi03fgXsZfU+B16daE5TNEqvXAm8q7qZBhtF/Xt+ZzjKQnIVF9kMRrS8fjv9pJMu6GBP5C2fKj8cV181CLDPDBVjSD/08xkMT7cogskuSqkxAdQ93cntEIUJO4gOz63tjLNXnkd42SaH2YiMwhxUMHOxl2ua2XjJG15iguBpUZ/zncwbyCDba/N59Yv6RdXKI645lbCO3Z4YxWDTrOMfRi X-Microsoft-Exchange-Diagnostics: 1; BN1PR02MB054; 25: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 X-LD-Processed: fcd9ea9c-ae8c-460c-ab3c-3db42d7ac64d,ExtAddr X-Microsoft-Exchange-Diagnostics: 1; BN1PR02MB054; 31:zeawAPAZrSiqLdmQgbdp+k/hFfRbAQUXvrWdwXLdnG5oJjhWdURdbHez6+FhnOjT6cL+IIr2LjwPi92zbogFdOjKTDuMlCTubm4tVvn8GpC1cai/2SNabYvFSWguo4wy49KakKQXt3ASrRM+mO1VUbgsefV7MGfSgMPj/UluhPLDuY55lus6ywSHATG7n+DbXIFCryp4mNPCdKqDyMda8KHIUjW6yQAEZU9QCYHY7UxZrD1OsRBBBwyN9CLha+ch3Ogm8khTF7VcfKB1cLooa7wbsj2NoDI63Y/dle+7wo0=; 20: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 X-Microsoft-Antispam-PRVS: X-Exchange-Antispam-Report-Test: UriScan:; X-Exchange-Antispam-Report-CFA-Test: BCL:0; PCL:0; RULEID:(6040375)(601004)(2401047)(13016025)(13018025)(5005006)(8121501046)(3002001)(10201501046)(6055026)(6041248)(20161123560025)(20161123562025)(20161123564025)(20161123555025)(6072148); SRVR:BN1PR02MB054; BCL:0; PCL:0; RULEID:; SRVR:BN1PR02MB054; X-Microsoft-Exchange-Diagnostics: 1; BN1PR02MB054; 4: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 X-Forefront-PRVS: 01480965DA X-Microsoft-Exchange-Diagnostics: =?us-ascii?Q?1; BN1PR02MB054; 23:iIXST8NPv0im1+8yDhb2z9LVlj4NdIe+/YHql/l8WO?= =?us-ascii?Q?bYiw9vGZNJq+nFFAdsOLbtP0Tp1o5NYa55KnkNTfy6qUSNA+/YztVgQ9q26n?= =?us-ascii?Q?XmeTapLqWrn2h9mMVC6or+QvqV3ChA3U5uTp5Z/UWIvlWq3rhaRoTUZKtxqt?= =?us-ascii?Q?A7iTufxEOtooHT/+0VpBOTwSDSNR9HGZOy/MrKwhndd1k2bAuJSy53dKIJ4S?= =?us-ascii?Q?B93CSufMsZcF2q9g0xYqDmo5hclPXPDPa1PQzZffUpkJz0DU/1kO6/z/mitx?= =?us-ascii?Q?prsM2BdkEJGpkA0U+RufrsfQ/NwMXGnd7cWQu0j99r2pZZ9uj98C7yWjOz8Z?= =?us-ascii?Q?Gj/Or4b0E0UkAdrStCn+MwIsfXy4c5eEyLMXViLf7lB8ZCbievuZ7p97M3BC?= =?us-ascii?Q?dG+pR1ulU4oesKO2qp0onY7oKLmc4rgt0PLsvV+V1q1wZEoEjzRvuVm6D61r?= =?us-ascii?Q?oNDe593tyv6hlkhzKhcdTIP1SjFfVsoY1WffUf3mvitnd36Ytx5iqM8Q4ka8?= =?us-ascii?Q?4Gv1Rn0yKeWPTDX9DFubS8BvQz3L/mcjOfaNeHprX3srqh2+KDrVNmLwx+4W?= =?us-ascii?Q?h5QYwLIELeSWrmCDu/Pg2KhxPcLDyX/JHjxL//9VngCBRgZ5qxwL0l7ecQ6m?= =?us-ascii?Q?oIHY+0q8Xcid7ben/971aJRNJpKuxiiSpES2DJ417osTVAEdTuB+UgK/oPv2?= =?us-ascii?Q?0SpEJOCbbzRy8U6j7E9U8un7ZI35FvD2QCPOBl0wX8olPiPQy0lUiS0+11KB?= =?us-ascii?Q?rYeIze5Is0JkmXCwJ49En5eeNgvBvXTV+s3e76dxI7hs5l1Y+caezIzUsD9M?= =?us-ascii?Q?ENOgZlgaqmnrd/HUdXmIjm89UWrBZnXKn92U03IMI7HekMGYXzMxWKR+AIKM?= =?us-ascii?Q?0VkV1FxcByBVExhQ10EaRedRn9qZxiGb1FHW76U8KF2qAdQKKWf505BMmH5D?= =?us-ascii?Q?8JCYvMSTjQnGx3lagvi4T/ql/H/FDe4nhcJII1J9t1W/5c60R1X0L5IlWhJ3?= =?us-ascii?Q?kqtjQsiYn28QDo9MzuqOFALF4cXjP0ysyV1OT6PAr3E4F6tnIxklSS+TcGXR?= =?us-ascii?Q?wn1NciCrIFrGZofdahuHzWUYiLAxJaL3MWoYw76rKkX2RBQpMu7VfBfWpayj?= =?us-ascii?Q?cfpsmws7dpwwRWim+uWFeK3/iSOec3I5YUYq9C8A0+i8uQL0C0yyWicdP5cB?= =?us-ascii?Q?/zq3XAGNHlcWaZATBHLDBIReDMASB9k8b8DwqlhUllYjX9ohQo5jyMP/oyBg?= =?us-ascii?Q?nfRboqx8Xz/Po9WOs=3D?= X-Microsoft-Exchange-Diagnostics: 1; BN1PR02MB054; 6:mDrsR1Qxd3b9kBHUxE8wsiaA9MwhIwKN9Mh6zrxT/69p3b862k4q+kQ+gAlszG74YFUgt4jGoZ1HIbOTBJUWXZdaPXiA8otWgHCNq064rHbYCaTriQjoW0CCtK0vaW8Zal0Y9Hc89RYlmtxB5cAc0Q+yaWZ/61YCozYuzJR+LjZZcXLyQTsiyiH36ojsdKpeC4OV8km6kUc6DK4/1nYo9v3a7iDygzpfliwi7OxgyrVwypNpreuN/ymTXIXEr7gdvjNmB6gLGcuU3DzSALiEC+/x14gO0nilRC6JnOQNDD4BNU3XhLIjaJHRtJHzkxhKfpjrnq2j/eP0lrxhEoNjLFRxgg6f/e3O3fgvDmwd0sus8z8RkBRVsx0wz+OnzMgfO6nTF+jJ/RFSALg2QeBcl1+LJjkeW2FVwCLNUArJCE4qfqjoufbjYei97eQh77EldPPBv9VQepR3qjzOKUnBow==; 5:fwPkD7G5AuGN+3l1W5+1MEgYDadJQ6ogiQ2HuPpJIoOnWHE7O0pAdD802MSJX6EOls/oxhhcb3G7WqEWkXCaEXFEFVnOMS/0V2ettBLxyzw/thi6jLSqs74SUthnvy1PpcM9i8TEFxyKvPKNgPNA/Q==; 24:SXd1Flx2f614BYFlbfbcTVmmdC9x4YkUGUYEnKjv82qaBBGRk3h6a+xdiBg+XaXz4oDsKj8D627sSfS6deD8tZcDD0Hq+BeNDxkqlwa9u6s= SpamDiagnosticOutput: 1:99 SpamDiagnosticMetadata: NSPM X-Microsoft-Exchange-Diagnostics: 1; BN1PR02MB054; 7:pXUkVfmVD434FqTIpY9WrRJSwWFO7uvwKi3XgRJzJ7ZTkxZBXxuxAFIblkGwSgp/Zd0Mqza6vOAnxRMGlHUAMjQdWEZbiBlSGpC2EL3fl0QrGwQ4mzVh8r05JRkZcQQcmiHIdDwvXZB72aV4qGPI7Y1bRvMwZJyyjka7yXE5ANzi050Hg5uz8pAyJeJ+JvNwFpso/2wJ/KB5x7F1xhn8HRqM9R6Qn/lcwWs07AbPYddsBBHt1+inEQSapEgyxfvRtf6QoEPB82iN+N0rygJl0ROChO0Wbhvdei1IPOrKgVx0GCxC0hSHDrePL0Bp26x6hPZQFTrs3OaVhAJGjBPdg5kMhxGOdnaynyLwBsTOkEsRroyg+3E/5B7QaGvITA95LrcqkrUgcPOrjCAdtraeMtod1DUaMhaLvtZkRPUzpVldaLrikiJ/eP60jWV0BlXqENKK2jVLvYmtFIYlwrlZ2Q==; 20:zjJFcewcOSW1OpF0vRYlnhspPvIEPbBYmfsTMH+hNyHlg1XgofkxVFhVKZu2z2D1x0oRl+yDxKKAfeYusx6SnZnLDJxVLDbVgXkxFT8mcD4wInurxHy4ATC2CgKQJVvHYCM8xpeL4968omLVpKdXtXVTvHFq3dnvxRihxOtxdOn5QiLmEddUy3JZprYnefQqa/WPVq03hOJkLPWlDEYa0T88fc2d1WH5yfcRuKHtChzlHSsvBRGb6sQO0DsbgYVD X-OriginatorOrg: sandiskcorp.onmicrosoft.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Dec 2016 17:18:31.0964 (UTC) X-MS-Exchange-CrossTenant-Id: fcd9ea9c-ae8c-460c-ab3c-3db42d7ac64d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=fcd9ea9c-ae8c-460c-ab3c-3db42d7ac64d; Ip=[63.163.107.21]; Helo=[milsmgep15.sandisk.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN1PR02MB054 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Adam Manzanares This patch checks to see if an ATA device supports NCQ command priorities. If so and the user has specified an iocontext that indicates IO_PRIO_CLASS_RT then we build a tf with a high priority command. This is done to improve the tail latency of commands that are high priority by passing priority to the device. tj: Removed trivial ata_ncq_prio_enabled() and open-coded the test. Signed-off-by: Adam Manzanares --- drivers/ata/libata-core.c | 33 ++++++++++++++++++++++++++++++++- drivers/ata/libata-scsi.c | 6 +++++- drivers/ata/libata.h | 3 ++- include/linux/ata.h | 6 ++++++ include/linux/libata.h | 3 +++ 5 files changed, 48 insertions(+), 3 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 223a770..5d16363 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -739,6 +739,7 @@ u64 ata_tf_read_block(const struct ata_taskfile *tf, struct ata_device *dev) * @n_block: Number of blocks * @tf_flags: RW/FUA etc... * @tag: tag + * @class: IO priority class * * LOCKING: * None. @@ -753,7 +754,7 @@ u64 ata_tf_read_block(const struct ata_taskfile *tf, struct ata_device *dev) */ int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, u64 block, u32 n_block, unsigned int tf_flags, - unsigned int tag) + unsigned int tag, int class) { tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; tf->flags |= tf_flags; @@ -785,6 +786,12 @@ int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, tf->device = ATA_LBA; if (tf->flags & ATA_TFLAG_FUA) tf->device |= 1 << 7; + + if (dev->flags & ATA_DFLAG_NCQ_PRIO) { + if (class == IOPRIO_CLASS_RT) + tf->hob_nsect |= ATA_PRIO_HIGH << + ATA_SHIFT_PRIO; + } } else if (dev->flags & ATA_DFLAG_LBA) { tf->flags |= ATA_TFLAG_LBA; @@ -2156,6 +2163,30 @@ static void ata_dev_config_ncq_non_data(struct ata_device *dev) } } +void ata_dev_config_ncq_prio(struct ata_device *dev) +{ + struct ata_port *ap = dev->link->ap; + unsigned int err_mask; + + err_mask = ata_read_log_page(dev, + ATA_LOG_SATA_ID_DEV_DATA, + ATA_LOG_SATA_SETTINGS, + ap->sector_buf, + 1); + if (err_mask) { + ata_dev_dbg(dev, + "failed to get Identify Device data, Emask 0x%x\n", + err_mask); + return; + } + + if (ap->sector_buf[ATA_LOG_NCQ_PRIO_OFFSET] & BIT(3)) + dev->flags |= ATA_DFLAG_NCQ_PRIO; + else + ata_dev_dbg(dev, "SATA page does not support priority\n"); + +} + static int ata_dev_config_ncq(struct ata_device *dev, char *desc, size_t desc_sz) { diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 9cceb4a..2bccc3c 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -50,6 +50,7 @@ #include #include #include +#include #include "libata.h" #include "libata-transport.h" @@ -1755,6 +1756,8 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) { struct scsi_cmnd *scmd = qc->scsicmd; const u8 *cdb = scmd->cmnd; + struct request *rq = scmd->request; + int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq)); unsigned int tf_flags = 0; u64 block; u32 n_block; @@ -1821,7 +1824,8 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc) qc->nbytes = n_block * scmd->device->sector_size; rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags, - qc->tag); + qc->tag, class); + if (likely(rc == 0)) return 0; diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h index 3b301a4..03d0908 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -66,7 +66,7 @@ extern u64 ata_tf_to_lba48(const struct ata_taskfile *tf); extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev, int tag); extern int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, u64 block, u32 n_block, unsigned int tf_flags, - unsigned int tag); + unsigned int tag, int class); extern u64 ata_tf_read_block(const struct ata_taskfile *tf, struct ata_device *dev); extern unsigned ata_exec_internal(struct ata_device *dev, @@ -85,6 +85,7 @@ extern int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags); extern int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, unsigned int readid_flags); extern int ata_dev_configure(struct ata_device *dev); +extern void ata_dev_config_ncq_prio(struct ata_device *dev); extern int sata_down_spd_limit(struct ata_link *link, u32 spd_limit); extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel); extern unsigned int ata_dev_set_feature(struct ata_device *dev, diff --git a/include/linux/ata.h b/include/linux/ata.h index fdb1803..af6859b 100644 --- a/include/linux/ata.h +++ b/include/linux/ata.h @@ -348,6 +348,7 @@ enum { ATA_LOG_DEVSLP_DETO = 0x01, ATA_LOG_DEVSLP_VALID = 0x07, ATA_LOG_DEVSLP_VALID_MASK = 0x80, + ATA_LOG_NCQ_PRIO_OFFSET = 0x09, /* NCQ send and receive log */ ATA_LOG_NCQ_SEND_RECV_SUBCMDS_OFFSET = 0x00, @@ -940,6 +941,11 @@ static inline bool ata_id_has_ncq_non_data(const u16 *id) return id[ATA_ID_SATA_CAPABILITY_2] & BIT(5); } +static inline bool ata_id_has_ncq_prio(const u16 *id) +{ + return id[ATA_ID_SATA_CAPABILITY] & BIT(12); +} + static inline bool ata_id_has_trim(const u16 *id) { if (ata_id_major_version(id) >= 7 && diff --git a/include/linux/libata.h b/include/linux/libata.h index 616eef4..90b69a6 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -166,6 +166,7 @@ enum { ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */ ATA_DFLAG_UNLOCK_HPA = (1 << 18), /* unlock HPA */ ATA_DFLAG_NCQ_SEND_RECV = (1 << 19), /* device supports NCQ SEND and RECV */ + ATA_DFLAG_NCQ_PRIO = (1 << 20), /* device supports NCQ priority */ ATA_DFLAG_INIT_MASK = (1 << 24) - 1, ATA_DFLAG_DETACH = (1 << 24), @@ -342,7 +343,9 @@ enum { ATA_SHIFT_PIO = 0, ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES, ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES, + ATA_SHIFT_PRIO = 6, + ATA_PRIO_HIGH = 2, /* size of buffer to pad xfers ending on unaligned boundaries */ ATA_DMA_PAD_SZ = 4,