From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
Cc: Grant Likely <grant.likely@secretlab.ca>,
Michal Simek <monstr@monstr.eu>, Arnd Bergmann <arnd@arndb.de>,
Vineet Gupta <Vineet.Gupta1@synopsys.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Geert Uytterhoeven <geert@linux-m68k.org>,
dahinds@users.sourceforge.net
Subject: Re: [PATCH] drivers/block/xsysace - replace in(out)_8/in(out)_be16/in(out)_le16 with generic iowrite(read)8/16(be)
Date: Fri, 08 Feb 2013 08:06:09 +1100 [thread overview]
Message-ID: <1360271169.2650.31.camel@pasglop> (raw)
In-Reply-To: <5113C459.8000602@synopsys.com>
On Thu, 2013-02-07 at 19:12 +0400, Alexey Brodkin wrote:
> not sure about items for "ace_datain/out_be16" - what about _rep
> options here?
Well, you have a backward wiring of an LE device so you can't use the
_rep variants, unless you ping pong, so you either use a loop of
ioread/write16 (le) and bite the bullet on extra barriers, or use _rep &
bounce buffer for a separate swap pass.
Point is, the backward wiring will require byteswap on both BE and LE
hosts for data (which is why it's so stupid).
Cheers,
Ben.
next prev parent reply other threads:[~2013-02-07 21:07 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-29 16:02 [PATCH] drivers/block/xsysace - replace in(out)_8/in(out)_be16/in(out)_le16 with generic iowrite(read)8/16(be) Alexey Brodkin
2013-01-29 16:27 ` Arnd Bergmann
2013-01-30 11:03 ` Alexey Brodkin
2013-01-30 11:13 ` Michal Simek
2013-01-30 12:10 ` Vineet Gupta
2013-01-30 12:31 ` Michal Simek
2013-01-30 14:36 ` Arnd Bergmann
2013-02-04 9:26 ` Michal Simek
2013-02-04 17:24 ` Arnd Bergmann
2013-02-05 2:29 ` Benjamin Herrenschmidt
2013-02-05 10:54 ` Michal Simek
2013-02-05 12:09 ` Vineet Gupta
2013-02-05 12:29 ` Benjamin Herrenschmidt
2013-02-05 12:19 ` Benjamin Herrenschmidt
2013-02-05 12:38 ` Michal Simek
2013-02-05 14:03 ` Alexey Brodkin
2013-02-05 15:12 ` Arnd Bergmann
2013-02-05 21:01 ` Benjamin Herrenschmidt
2013-02-06 10:03 ` Grant Likely
2013-02-06 16:20 ` Arnd Bergmann
2013-02-06 16:21 ` Michal Simek
2013-02-07 0:34 ` Arnd Bergmann
2013-02-06 17:40 ` Michal Simek
2013-02-06 19:51 ` Geert Uytterhoeven
2013-02-07 7:23 ` Michal Simek
2013-02-07 7:38 ` Geert Uytterhoeven
2013-02-07 8:01 ` Michal Simek
2013-02-07 8:20 ` Geert Uytterhoeven
2013-02-07 8:33 ` Arnd Bergmann
2013-02-07 14:19 ` Michal Simek
2013-02-07 23:12 ` Arnd Bergmann
2013-02-11 10:38 ` Michal Simek
2013-02-11 15:26 ` Arnd Bergmann
2013-02-11 15:36 ` Michal Simek
2013-02-11 15:43 ` Arnd Bergmann
2013-02-11 15:57 ` Michal Simek
2013-02-11 16:08 ` Arnd Bergmann
2013-02-12 0:29 ` Benjamin Herrenschmidt
2013-02-12 11:29 ` Arnd Bergmann
2013-02-12 10:11 ` Michal Simek
2013-02-12 11:26 ` Arnd Bergmann
2013-02-12 12:14 ` Michal Simek
2013-02-12 13:55 ` Arnd Bergmann
2013-02-12 12:30 ` Benjamin Herrenschmidt
2013-02-12 0:25 ` Benjamin Herrenschmidt
2013-02-12 10:03 ` Michal Simek
2013-02-05 21:00 ` Benjamin Herrenschmidt
2013-02-05 21:25 ` Alexey Brodkin
2013-02-05 23:07 ` Benjamin Herrenschmidt
2013-02-06 10:14 ` Grant Likely
2013-02-06 16:27 ` Arnd Bergmann
2013-02-06 21:35 ` Benjamin Herrenschmidt
2013-02-07 12:09 ` Alexey Brodkin
2013-02-07 12:20 ` Benjamin Herrenschmidt
2013-02-07 12:23 ` Benjamin Herrenschmidt
2013-02-07 14:31 ` Michal Simek
2013-02-07 14:35 ` Alexey Brodkin
2013-02-07 14:39 ` Grant Likely
2013-02-07 14:51 ` Grant Likely
2013-02-07 15:12 ` Alexey Brodkin
2013-02-07 15:23 ` Grant Likely
2013-02-07 15:28 ` Alexey Brodkin
2013-02-07 16:44 ` Grant Likely
2013-02-07 16:56 ` Alexey Brodkin
2013-02-07 17:16 ` Grant Likely
2013-02-07 17:22 ` Alexey Brodkin
2013-02-08 7:45 ` Grant Likely
2013-02-07 21:18 ` Benjamin Herrenschmidt
2013-02-07 21:15 ` Benjamin Herrenschmidt
2013-02-07 23:05 ` Arnd Bergmann
2013-02-08 6:19 ` Geert Uytterhoeven
2013-02-08 7:14 ` Grant Likely
2013-02-07 21:09 ` Benjamin Herrenschmidt
2013-02-12 17:02 ` Michal Simek
2013-02-12 17:25 ` Arnd Bergmann
2013-03-21 17:01 ` Alexey Brodkin
2013-06-19 8:56 ` xsysace driver support on arches other than PPC/Microblaze Alexey Brodkin
2013-06-19 9:09 ` Alexey Brodkin
2013-06-19 12:13 ` Andy Shevchenko
2013-06-19 12:56 ` Alexey Brodkin
2013-06-19 14:51 ` Arnd Bergmann
2013-02-07 21:06 ` Benjamin Herrenschmidt [this message]
2013-02-05 23:03 ` [PATCH] drivers/block/xsysace - replace in(out)_8/in(out)_be16/in(out)_le16 with generic iowrite(read)8/16(be) Arnd Bergmann
2013-02-06 8:59 ` Geert Uytterhoeven
2013-02-06 16:18 ` Arnd Bergmann
2013-02-05 10:45 ` Michal Simek
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