Re: Locking and mapping User VA pages

From: Robert Kaiser (rob@rob.devdep.sysgo.de)
Date: Thu Mar 30 2000 - 03:15:00 EST


In article <1355693A51C0D211B55A00105ACCFE64E94F77@atl_ms1>,
        Venkateshr@ami.com (Venkatesh Ramamurthy) writes:
> I want my card to directly read/write into the user address space. For this
> i need to lock the pages and want it to create my own sg list. what is the
> best method for it?

AFAIK there is currently no real support for this in the kernel.
There is a patch available at ftp://ftp.sysgo.de/pub/Linux/
that adds support for scatter/gather DMA to the kernel.

Rob

----------------------------------------------------------------
Robert Kaiser email: rkaiser@sysgo.de
SYSGO RTS GmbH
Am Pfaffenstein 14 phone: (49) 6136 9948-762
D-55270 Klein-Winternheim / Germany fax: (49) 6136 9948-10

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