From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756281AbbJ1VbU (ORCPT ); Wed, 28 Oct 2015 17:31:20 -0400 Received: from mail-bl2on0143.outbound.protection.outlook.com ([65.55.169.143]:35661 "EHLO na01-bl2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752323AbbJ1VbS (ORCPT ); Wed, 28 Oct 2015 17:31:18 -0400 Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=scottwood@freescale.com; Message-ID: <1446067854.701.365.camel@freescale.com> Subject: Re: [V5, 2/6] fsl/fman: Add FMan support From: Scott Wood To: Liberman Igal-B31950 CC: "netdev@vger.kernel.org" , "linuxppc-dev@lists.ozlabs.org" , "linux-kernel@vger.kernel.org" , "Bucur Madalin-Cristian-B32716" Date: Wed, 28 Oct 2015 16:30:54 -0500 In-Reply-To: References: <1442836354-5445-1-git-send-email-igal.liberman@freescale.com> <20150925230153.GA4626@home.buserror.net> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.16.0-fta1 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Originating-IP: [192.88.168.50] X-ClientProxiedBy: CY1PR20CA0123.namprd20.prod.outlook.com (25.164.213.177) To BN3PR03MB1479.namprd03.prod.outlook.com (25.163.35.142) X-Microsoft-Exchange-Diagnostics: 1;BN3PR03MB1479;2:qWMWDIF7fPJvfCE67tmEiLOgJv37YSlgy6YFx6yJCVdAFuNPNqzAcRKSbpi9Oi8T+xDLU74yQJGOu+yn9InfePnR6sQ66mDdCqdc/a9we5cs3EpBba9iS2wSAASYAxBFnk8b0ELspAcqB+6r4nntFm7qRIXOQNg52DMWHXNub+A=;3:P2rqARRdsrZ6nMpGiLcr+/Y9S7RAhGP4s7zUpRAEN+uxHKW+5p7VJD0d2JTZeXIypkZiis0K+ku9Tv9j4oQrUCtaea0CG3azgzeFVK8w4H5QTHNXTYhySUjyq7w8M3c16++lZZj6b3UQsT40Z9+kaA==;25:uSpZVdhiDBklPY153DUAXTzSfzzNRZHNPrh5LG1V614Ns9SVNk6mW217PA8oCw7HQ+1nXcA5rg9cHauNgT/JyRifQPEwmAhWpPGwVJbR8TIQMQhK3TtBOlLbv96gYQVZXxXaUUzUAUX4Ah3qtPnn3UPrCY6G3t2ius/KJbjkVxsdcgjORATstOK1IOt5WyHHmPq3EoT/GKk3+YgIRxA0J7Qzn7mKK3plyPHaC+Nk9Q9g5BqNjqRuOhltvVErGgAH+u+hm08MGUDnlg9NbjZ+2A== X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:BN3PR03MB1479; 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X-Microsoft-Exchange-Diagnostics: =?utf-8?B?MTtCTjNQUjAzTUIxNDc5OzIzOmRPTVJVUW9VSWlBOWdXRGNPcTZYUXY1Tlpn?= =?utf-8?B?dTAxbCt3VzlCQWtDTyt5M0pwd21Pc29lR3FKWmVqZkdVWG9OOWEzZElZYkNR?= =?utf-8?B?cjNMU0tib05xOWxaU1BjWWhETUxOclQ2MFMxWXh2Wm54cWg0U2ZjK00yUGdJ?= =?utf-8?B?dEd5VmZVbzFJcXZzQTJHc1dMNVRrRGtlOFZJaVMrMFl3emkvOWt1Z3dzRkxu?= =?utf-8?B?T0tDUm5xVE54N2JWdUYvc0FncjRjOW5BNHd0Sk52b01OVUFKbFBkL1hrZUlS?= =?utf-8?B?K29YUncvRytzcXlwVmREanZDWFBSOWM1eENlOUQxejRORnFYL3lmWWF5bVd6?= =?utf-8?B?NVRTVC9raC9STk80b2V5azhhWnovUXZtQXNqdzRmblArSUFJWG9jeDZrWS93?= =?utf-8?B?Ry9jMy9pOU5yaWFqM2FQTlJYRlRtOCtMZ3Zackcydm9XTFpOOG5xUHQ0Sldz?= =?utf-8?B?RUprVitneDdseGIxYTJxdGt2VjNSLzA4Q3BZRkJaQ08raHM0RVlhdWVTK0do?= =?utf-8?B?VVk2ZUorb1NjbzFYd3lGbWVpYVRxTFBRTjlsQXZZU1IxTjFnSmxHMW1ZVmZP?= =?utf-8?B?NmlteU5UZ254cjBTY01ZNURVYjBuM2ZvSWN4VjRjM0xhczhnTHhGTjFZYlBa?= =?utf-8?B?YlEyVWhKeXIzUWEzZG80RmxCbVY5cGNXU1VXeHpYdXZHdjJPYmNYVDJ0RDd5?= =?utf-8?B?ZEpCMVpFTkZzRmhiY1Rlcm13MlZUWWRXNWM3REsxZWxoNGE5bjF1MU52b3Ns?= =?utf-8?B?OUNNY3ZWbTV4clNKUWRWUzZqNm4rSFZCUGZJYkc5YW9WUjY2bEVReXVFS3Nn?= =?utf-8?B?eFo4VW5QWDg5N2YyQmZlNTl4dG5mMCswTUdPNXl5WDJhMWsyVmtUeVZ2NTJZ?= =?utf-8?B?SEFkdHBhb2o4cFQ1WXUwWE5lRnROSm4wZmJDTHIxa25IVGVoKzJnNnB5YVZZ?= =?utf-8?B?QmVWOFc2YlEyV1EyWTFoVzNaRVRpNjkxcWlDUGY3SmgvNFBSVEdxcFpBWXdt?= =?utf-8?B?U0xXVVNpUmpodEZBcW9kbS94K0pScmViekdNekY4ZzNMTVQzc3UydFFGMUhT?= =?utf-8?B?Q2xQMmZSUTJDQXIyd3VydTJxY0I2L25wdWlLZTlhMmVlZTVia2M2VWpHbnlQ?= =?utf-8?B?ZkJremdKckltRVM4TWpCa0s2N0VkbCsvWTI4NCtlK255YWtGUGszbnRneFJY?= =?utf-8?B?citFVk1MQ2lyNXYyNzJtL084RlA3NmF6VGoxaWtOZVBhOE5EZVRncGNDMVhS?= =?utf-8?B?d21zRDQyMGQzTkxPc3VWbWIwdXlIOUFpdzVadXZXRVFVd0pOczFYdloyOStX?= =?utf-8?B?MVEyZE9Fc1BPZGZlcG1QbTdleFd5dmV1YTEya2FrcDdydE5zbG56VGhFUTRD?= =?utf-8?B?dWE1MGYyZTFUQ3VMNCtYcnR6T2dvTHV1c1d1K2V2ZURDT1BSNmk5UThoeTF5?= =?utf-8?B?YWlodENzMjZFUm02dWtualkwZGkvbUZTSzdTL3l2U001K0d3V3NGU21lOEVz?= =?utf-8?Q?pAOAQqnaRBb+ph9mgMm5eZ7eo=3D?= X-Microsoft-Exchange-Diagnostics: 1;BN3PR03MB1479;5:I+XL+rMZf8ZsI+eMZymUuxyDwhg/RbUa2vAhHi6Wu1h3dou3vLC2NZbDCnJTGri2caG3EQLPCPgba1R7gTThDNV9NkJvjtJKayH59vJAzzsMS3WDFZTZa2dkQapOtsj9S8FlxpJaDXvmWeV3mouAwA==;24:pyVY14vbU1Dugm1/WZNWNWqtRw7crjOa7DmSnnm6XFvJAqaGoypRP3TP9Mco5XUIm8VfRq1g09MtM20BNjDv3huo7oLIoRQToNGRt2liEQA=;20:0r2pRugWQzj1pQpPQcuKUqm3U6B/lxVzpVMHjw1dpZdPbtG6iW8W4CqrvtsEwZXj76hQ7fgtITwrQq3ZthfzyA== X-OriginatorOrg: freescale.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Oct 2015 21:31:15.0187 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN3PR03MB1479 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2015-10-27 at 11:32 -0500, Liberman Igal-B31950 wrote: > > > + > > > +struct device *fman_get_device(struct fman *fman) { > > > + return fman->dev; > > > +} > > > > Is this really necessary? > > > > Fman port needs fman->dev, fman structure is opaque, so yes, it's needed. Why is opacity being maintained from one part of the fman driver to another? Isn't this the sort of excessive layering that was complained about? > > > + /* In B4 rev 2.0 (and above) the MURAM size is 512KB. > > > + * Check the SVR and update MURAM size if required. > > > + */ > > > + u32 svr; > > > + > > > + svr = mfspr(SPRN_SVR); > > > + > > > + if ((SVR_SOC_VER(svr) == SVR_B4860) && (SVR_MAJ(svr) >= > > 2)) > > > + fman->dts_params.muram_size = 0x80000; > > > + } > > > > Why wasn't the MURAM size described in the device tree, as it was with > > CPM/QE? > > > > MURAM size described by the device-tree. > In B4860 rev 2.0 (and above) MURAM size is bigger. > This is workaround, in order to have the same device tree for all B4860 > revisions. We don't support b4860 prior to rev 2.0 (due to e6500 core errata) so this is irrelevant. Fix the device tree. > > > + > > > + of_node_put(muram_node); > > > + of_node_put(fm_node); > > > + > > > + err = devm_request_irq(&of_dev->dev, irq, fman_irq, > > > + IRQF_NO_SUSPEND, "fman", fman); > > > + if (err < 0) { > > > + pr_err("Error: allocating irq %d (error = %d)\n", irq, err); > > > + goto fman_free; > > > + } > > > > Why IRQF_NO_SUSPEND? > > > > It shouldn't be IRQF_NO_SUSPEND for now, removed. Why just "for now"? -Scott