From: Samuel Ortiz <sameo@linux.intel.com>
To: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: linux-mmc@vger.kernel.org, linux-sh@vger.kernel.org,
Ian Molton <ian@mnementh.co.uk>, Magnus Damm <damm@opensource.se>
Subject: Re: [PATCH 2/3 v2] mmc: tmio: implement a bounce buffer for
Date: Fri, 24 Dec 2010 11:11:00 +0000 [thread overview]
Message-ID: <20101224111100.GF27832@sortiz-mobl> (raw)
In-Reply-To: <Pine.LNX.4.64.1012221156580.14483@axis700.grange>
On Wed, Dec 22, 2010 at 12:02:15PM +0100, Guennadi Liakhovetski wrote:
> For example, with SDIO WLAN cards, some transfers happen with buffers at odd
> addresses, whereas the SH-Mobile DMA engine requires even addresses for SDHI.
> This patch extends the tmio driver with a bounce buffer, that is used for
> single entry scatter-gather lists both for sending and receiving. If we ever
> encounter unaligned transfers with multi-element sg lists, this patch will have
> to be extended. For now it just falls back to PIO in this and other unsupported
> cases.
>
> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
for the MFD part.
Cheers,
Samuel.
--
Intel Open Source Technology Centre
http://oss.intel.com/
next prev parent reply other threads:[~2010-12-24 11:11 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-23 16:24 [PATCH 0/3] handle unaligned buffers, when using TMIO-MMC with DMA Guennadi Liakhovetski
2010-11-23 16:24 ` [PATCH 1/3] mmc: tmio: merge the private header into the driver Guennadi Liakhovetski
2011-01-05 19:50 ` Chris Ball
2010-11-23 16:24 ` [PATCH 2/3] mmc: tmio: implement a bounce buffer for unaligned DMA Guennadi Liakhovetski
2010-11-26 12:04 ` [PATCH 2/3] mmc: tmio: implement a bounce buffer for unaligned Samuel Ortiz
2010-12-19 21:16 ` [PATCH] mmc: tmio_mmc: silence compiler warnings Arnd Hannemann
2011-01-05 20:48 ` Chris Ball
2010-12-22 11:02 ` [PATCH 2/3 v2] mmc: tmio: implement a bounce buffer for unaligned Guennadi Liakhovetski
2010-12-24 11:11 ` Samuel Ortiz [this message]
2011-01-05 19:56 ` [PATCH 2/3] " Chris Ball
2011-01-05 20:56 ` [PATCH 2/3 v3] " Guennadi Liakhovetski
2011-01-05 21:06 ` [PATCH 2/3 v3] mmc: tmio: implement a bounce buffer for Chris Ball
2010-11-23 16:24 ` [PATCH 3/3] mfd: sdhi: require the tmio-mmc driver to bounce unaligned Guennadi Liakhovetski
2010-11-26 12:05 ` [PATCH 3/3] mfd: sdhi: require the tmio-mmc driver to bounce Samuel Ortiz
2011-01-05 20:49 ` Chris Ball
2010-12-14 16:07 ` [PATCH 0/3] handle unaligned buffers, when using TMIO-MMC with Guennadi Liakhovetski
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