From: Vinod Koul <vinod.koul@intel.com>
To: Andy Shevchenko <andriy.shevchenko@linux.jf.intel.com>
Cc: Viresh Kumar <viresh.linux@gmail.com>,
linux-kernel@vger.kernel.org,
spear-devel <spear-devel@list.st.com>
Subject: Re: [PATCH v2] dw_dmac: allocate dma descriptors from DMA_COHERENT memory
Date: Sun, 20 Jan 2013 20:50:30 -0800 [thread overview]
Message-ID: <20130121045030.GC21551@intel.com> (raw)
In-Reply-To: <1358344131-18097-1-git-send-email-andriy.shevchenko@linux.intel.com>
On Wed, Jan 16, 2013 at 03:48:50PM +0200, Andy Shevchenko wrote:
> Currently descriptors are allocated from normal cacheable memory and that slows
> down filling the descriptors, as we need to call cache_coherency routines
> afterwards. It would be better to allocate memory for these descriptors from
> DMA_COHERENT memory. This would make code much cleaner too.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
> Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Applied Thanks
--
~Vinod
prev parent reply other threads:[~2013-01-21 5:15 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-16 13:48 [PATCH v2] dw_dmac: allocate dma descriptors from DMA_COHERENT memory Andy Shevchenko
2013-01-16 13:48 ` [PATCH v3] dw_dmac: don't exceed AHB master number in dwc_get_data_width Andy Shevchenko
2013-01-16 14:07 ` Viresh Kumar
2013-01-16 15:02 ` Andy Shevchenko
2013-01-16 16:43 ` Viresh Kumar
2013-01-21 4:50 ` Vinod Koul [this message]
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