From: Scott Wood <scottwood@freescale.com>
To: rmcguire@videopresence.com
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: virt_to_phys() in drivers w/dma - MPC8xxx
Date: Mon, 25 Aug 2008 10:33:30 -0500 [thread overview]
Message-ID: <48B2D0CA.10602@freescale.com> (raw)
In-Reply-To: <6FC450394F2147FDB7EC1D1EB168EB8B@absolutdaddy>
Russell McGuire wrote:
> So shouldn't we be using like dma_alloc_coherent, and then tracking the dma
> address separately as a variable, and use it when necessary instead of
> calling virt_to_phys()?
Yes. On 8xxx (but not 8xx, and not with 36-bit memory), there'll be no
practical difference, but the DMA mapping API *should* be used.
-Scott
prev parent reply other threads:[~2008-08-25 16:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.1.1217383202.19379.linuxppc-embedded@ozlabs.org>
2008-08-20 23:49 ` ELDK Fedora Core 9 Russell McGuire
2008-08-21 10:10 ` Wolfgang Denk
2008-08-22 23:14 ` virt_to_phys() in drivers w/dma - MPC8xxx Russell McGuire
2008-08-25 15:33 ` Scott Wood [this message]
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