From: Scott Wood <scottwood@freescale.com>
To: Siva Prasad <sprasad@bivio.net>
Cc: sureshtang@gmail.com, linuxppc-embedded@ozlabs.org
Subject: Re: Linuxppc-embedded Digest, Vol 35, Issue 33
Date: Mon, 16 Jul 2007 11:09:09 -0500 [thread overview]
Message-ID: <469B9825.6070507@freescale.com> (raw)
In-Reply-To: <D83235F0F3C86D4D889D8B9A0DA8C6D78D7DE9@corpexc01.corp.networkrobots.com>
Siva Prasad wrote:
> It returns kernel virtual address. If you use this buffer space for DMA,
> please use appropriate flags. You may use __pa(address) or
> virt_to_phys() to convert virtual to physical.
No, you may not -- physical and DMA addresses are not always identical.
Use the DMA mapping API.
-Scott
next prev parent reply other threads:[~2007-07-16 16:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.1061.1184600645.8639.linuxppc-embedded@ozlabs.org>
2007-07-16 15:58 ` Linuxppc-embedded Digest, Vol 35, Issue 33 Siva Prasad
2007-07-16 16:09 ` Scott Wood [this message]
2007-07-17 5:59 ` suresh suresh
2007-07-17 16:02 ` Scott Wood
2007-07-17 22:41 ` Siva Prasad
2007-07-17 22:51 ` Scott Wood
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