From: Stefan Richter <stefanr@s5r6.in-berlin.de>
To: Tom Brown <sa212+emis@cyconix.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Yong Zhang <yong.zhang@windriver.com>
Subject: Re: Question: how to copy to user space from a tasklet
Date: Fri, 15 Oct 2010 07:57:59 +0200 [thread overview]
Message-ID: <4CB7ED67.2000407@s5r6.in-berlin.de> (raw)
In-Reply-To: <4CB6DEC4.4040408@cyconix.com>
Tom Brown wrote:
> [Sorry to have to ask this here - I can't find any driver-specific
> newsgroup or mailing lists - are there any??]
linux-newbie perhaps.
> I have a driver which needs to copy device data direct to user space
> from a tasklet.
One way would be to use mmap() to allocate the DMA buffer and insert it into
the user address space before DMA commences. An additional poll/read/write
based protocol or so can be used for buffer management during DMA.
--
Stefan Richter
-=====-==-=- =-=- -====
http://arcgraph.de/sr/
next prev parent reply other threads:[~2010-10-15 5:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-14 10:43 Question: how to copy to user space from a tasklet Tom Brown
2010-10-15 2:15 ` Yong Zhang
2010-10-15 5:57 ` Stefan Richter [this message]
2010-10-15 8:59 ` Arnd Bergmann
2010-10-18 15:45 ` Tom Brown
2010-10-18 17:01 ` Stefan Richter
2010-10-18 18:02 ` Tom Brown
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