linux-kernel - Re: [PATCH] dmatest: masking tests for channel capabilities

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Message-ID: <CAA9_cmdr7gjrbBN8tV9LAH2JXzFiegLzLPOAHVg-9sP8p9HRqg@mail.gmail.com>
Date:	Mon, 17 Jun 2013 14:12:51 -0700
From:	Dan Williams <djbw@...com>
To:	Jubin Mehta <jubin.mehta@...el.com>
Cc:	Vinod Koul <vinod.koul@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Dave Jiang <dave.jiang@...el.com>,
	Jon Mason <jon.mason@...el.com>
Subject: Re: [PATCH] dmatest: masking tests for channel capabilities

[ apologies for the resend, gmail defaulted to html ]

On Mon, Jun 17, 2013 at 2:10 PM, Dan Williams <djbw@...com> wrote:
>> +Example to perform only MEMCPY and PQ mode tests (0x01 | 0x04 = 0x05):
>> +
>> +        % modprobe dmatest
>> +        % echo dma0chan0 > /sys/kernel/debug/dmatest/channel
>> +        % echo 5  > /sys/kernel/debug/dmatest/cap_mask
>> +        % echo 1 > /sys/kernel/debug/dmatest/iterations
>> +        % echo 1 > /sys/kernel/debug/dmatest/run
>
>
> Hmmm, I should have paid more attention when the debugfs support was
> initially proposed for dmatest.  As it is I see duplication and
> configuration parameters getting out of sync with their module parameter
> equivalents versus just having all configuration go through module
> parameters.  module_param_call() can be used for the more complex options.
> Debugfs at this point looks like overkill for what amounts to some simple
> configuration variables and a result line.
>
> --
> Dan
>
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