From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752875Ab3CELAK (ORCPT ); Tue, 5 Mar 2013 06:00:10 -0500 Received: from mga11.intel.com ([192.55.52.93]:4835 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751094Ab3CELAI (ORCPT ); Tue, 5 Mar 2013 06:00:08 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.84,787,1355126400"; d="scan'208";a="299215109" Date: Tue, 5 Mar 2013 16:05:25 +0530 From: Vinod Koul To: Andy Shevchenko Cc: Andy Shevchenko , linux-kernel@vger.kernel.org, Viresh Kumar , Andrew Morton Subject: Re: [PATCH 06/10] dmatest: run test via debugfs Message-ID: <20130305103525.GB13370@intel.com> References: <1362388174-3435-1-git-send-email-andriy.shevchenko@linux.intel.com> <1362388174-3435-7-git-send-email-andriy.shevchenko@linux.intel.com> <20130305092649.GD28136@intel.com> <1362479804.28241.114.camel@smile> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1362479804.28241.114.camel@smile> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 05, 2013 at 12:36:44PM +0200, Andy Shevchenko wrote: > On Tue, 2013-03-05 at 14:56 +0530, Vinod Koul wrote: > > On Mon, Mar 04, 2013 at 11:09:30AM +0200, Andy Shevchenko wrote: > > > @@ -0,0 +1,48 @@ > > > + DMA Test Guide > > > + ============== > > > + > > > + Andy Shevchenko > > > + > > > +This small document introduces how to test DMA drivers using dmatest module. > > > + > > > + Part 1 - How to build the test module > > > + > > > +The menuconfig contains an option that could be found by following path: > > > + Device Drivers -> DMA Engine support -> DMA Test client > > > + > > > +In the configuration file the option called CONFIG_DMATEST. The dmatest could > > > +be built as module or inside kernel. Let's consider those cases. > > > + > > > + Part 2 - When dmatest is built as a module... > > > + > > > +After mounting debugfs and loading the module, the /sys/kernel/debug/dmatest > > > +folder with nodes will be created. They are the same as module parameters with > > > +addition of the 'run' node that controls run and stop phases of the test. > > > + > > > +Note that in this case test will not run on load automatically. > > > + > > > +Example of usage: > > > + % echo dma0chan0 > /sys/kernel/debug/dmatest/channel > > > + % echo 2000 > /sys/kernel/debug/dmatest/timeout > > > + % echo 1 > /sys/kernel/debug/dmatest/iterations > > > + % echo 1 > /sys/kernel/debug/dmatest/run > > How do you terminate a test? Esp if you have started bunch of concurent tests > > and want to terminate one of them... > > There is only one test in progress is possible. Wasnt the idea to run concurrent tests, or I read wrongly... -- ~Vinod