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Date: Tue, 18 Dec 2007 13:47:49 +0100
From: Jan Kiszka <jan.kiszka@domain.hid>
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Subject: Re: [Xenomai-help] RTDM mmap and DMA
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To: Perrine Martignoni <perrmart@domain.hid>
Cc: xenomai-help <xenomai@xenomai.org>

Perrine Martignoni wrote:
> Thanks for the explanation.
> But how can I do to allocate the DMA area ? with the Dma-api of Linux or
> Xenomai offers the possibility to do this ? and what about memory heap with
> H_DMA ?
> I'm a bit confused with all of this.

Yes, allocation and registration (pci_map*/pci_unmap*) is intended to
run via normal Linux. H_DMA (if you were using heaps here), which leads
to GFP_DMA, is only involved for old ISA hardware.

Jan

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Siemens AG, Corporate Technology, CT SE 2
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