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 <[email protected]> > > > + > > > +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...
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