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.
next 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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