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From: jerome.arbez-gindre@laposte.net (Jérôme Arbez-Gindre)
To: qemu-devel <qemu-devel@nongnu.org>
Subject: [Qemu-devel] DMA transfer failing most of the time
Date: 21 Sep 2006 16:27:19 +0200	[thread overview]
Message-ID: <87fyels3aw.fsf@bibi.net> (raw)


Hi,
I'm writing a PCI board emulation in Qemu 0.8.1. (i386)
I'm also writing the corresponding Linux 2.6 driver.

In the emulation, I'm performing DMA transfers by calls to

cpu_physical_memory_rw()

and then, I'm generating a interrupt.

In the Linux driver, in the interrupt handler, when I check the
transferred data, the most of the time they are not updated and when
after waiting a little (10ms), I check again the transferred data,
and they are OK (most of the time).

In your opinion, is their something I'm missing ?

Any help would be appreciated.

Thanks,

Jérôme.

             reply	other threads:[~2006-09-21 14:31 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-09-21 14:27 Jérôme Arbez-Gindre [this message]
2006-09-22 13:33 ` [Qemu-devel] Re: DMA transfer failing most of the time Jérôme Arbez-Gindre

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