how to get a 64k DMA buffer for a user program?

Harald Koenig (koenig@tat.physik.uni-tuebingen.de)
Wed, 2 Apr 1997 21:48:27 +0200 (MET DST)

Hi,

is there a simple hack for Linux 2.0.X that the kernel allocates a
contigous 64k area of memory which then can be mmaped by a user program
which is going to use this as DMA buffer then ?

using a full kernel driver is no option (at least right now for first tests)
and having this 64k locked, contiguous area seems to be enough for now
(it's a PCI card, so there is no need for <16MB addresses).

aTdHvAaNnKcSe for any hint/hack,

Harald

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