From owner-freebsd-hackers  Wed Feb 12 00:28:11 1997
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Date: Wed, 12 Feb 1997 19:22:17 +1100
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199702120822.TAA06992@godzilla.zeta.org.au>
To: julian@whistle.com, terry@lambert.org
Subject: Re: Raw I/O Question
Cc: freebsd-hackers@freebsd.org, Shimon@i-Connect.Net
Sender: owner-hackers@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

>it then calls the strategy routine for the device
>which gets the kv region, 
>and extracts the phyical addresses again and 
>sets up the DMA
>and then waits
>
>DMA is directly into the users pages..

Only for devices and device drivers that support and use DMA.

Bruce