From: Jamie Lokier <lk@tantalophile.demon.co.uk>
To: Friedrich Steven E CONT CNIN <friedrich_s@crane.navy.mil>
Cc: linux-kernel@vger.kernel.org
Subject: Re: device driver questions
Date: Sat, 14 Apr 2001 01:16:02 +0200 [thread overview]
Message-ID: <20010414011602.E2290@pcep-jamie.cern.ch> (raw)
In-Reply-To: <AF6E1CA59D6AD1119C3A00A0C9893C9A04F57121@cninexchsrv01.crane.navy.mil>
In-Reply-To: <AF6E1CA59D6AD1119C3A00A0C9893C9A04F57121@cninexchsrv01.crane.navy.mil>; from friedrich_s@crane.navy.mil on Fri, Apr 13, 2001 at 03:10:48PM -0500
Friedrich Steven E CONT CNIN wrote:
> If you want to mmap the device then you really want to put the
> device in its own 4K aligned 4K sized PCI window, otherwise adjacent
> devices will become accessible too and that might not be desirable.
If you can, reprogram the device's PCI configuration to have a 4k or
more sized window. (You said you were willing to move functionality
into the hardware, so I assume you can do this). That guarantees it
will be page aligned, and without other devices overlapping in
userspace.
-- Jamie
next prev parent reply other threads:[~2001-04-13 23:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-13 20:10 Friedrich Steven E CONT CNIN
2001-04-13 23:16 ` Jamie Lokier [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-04-13 19:33 Friedrich Steven E CONT CNIN
2001-04-13 19:46 ` Alan Cox
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