From: "Blue Swirl" <blauwirbel@gmail.com>
To: Paul Brook <paul@codesourcery.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>,
chrisw@redhat.com, kvm@vger.kernel.org, qemu-devel@nongnu.org,
Gerd Hoffmann <kraxel@redhat.com>, Avi Kivity <avi@redhat.com>
Subject: Re: [Qemu-devel] Re: [PATCH 2 of 5] add can_dma/post_dma for direct IO
Date: Tue, 16 Dec 2008 18:35:08 +0200 [thread overview]
Message-ID: <f43fc5580812160835u4eb247ecw6b1200c0979c19f6@mail.gmail.com> (raw)
In-Reply-To: <200812161630.00400.paul@codesourcery.com>
On 12/16/08, Paul Brook <paul@codesourcery.com> wrote:
> > The generic resolving API should look something like
> >
> > int (*resolve)(target_phys_addr_t address_in, target_phys_addr_t
> > length_in, target_phys_addr_t &address_out, target_phys_addr_t
> > &length_out)
>
>
> I don't think this is sufficient. A paged iommu may split a single range into
> multiple disjoint sections. i.e. we need SG lists.
That's why there is the length_out, it is called repeatedly until the
length is zero or it fails.
next prev parent reply other threads:[~2008-12-16 16:44 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-12 18:16 [Qemu-devel] [PATCH 0 of 5] dma api v3 Andrea Arcangeli
2008-12-12 18:16 ` [Qemu-devel] [PATCH 1 of 5] fix cpu_physical_memory len Andrea Arcangeli
2008-12-12 19:06 ` [Qemu-devel] " Anthony Liguori
2008-12-12 19:26 ` Andrea Arcangeli
2008-12-12 18:16 ` [Qemu-devel] [PATCH 2 of 5] add can_dma/post_dma for direct IO Andrea Arcangeli
2008-12-12 19:00 ` Blue Swirl
2008-12-12 19:18 ` Anthony Liguori
2008-12-12 20:05 ` Blue Swirl
2008-12-12 20:10 ` Anthony Liguori
2008-12-12 19:15 ` [Qemu-devel] " Anthony Liguori
2008-12-12 19:37 ` Andrea Arcangeli
2008-12-12 20:09 ` Anthony Liguori
2008-12-12 20:25 ` Gerd Hoffmann
2008-12-12 19:39 ` Anthony Liguori
2008-12-13 9:22 ` Avi Kivity
2008-12-13 16:45 ` Anthony Liguori
2008-12-13 19:48 ` Avi Kivity
2008-12-13 21:07 ` Anthony Liguori
2008-12-14 6:03 ` Avi Kivity
2008-12-14 19:10 ` Anthony Liguori
2008-12-14 19:49 ` Avi Kivity
2008-12-14 23:08 ` Anthony Liguori
2008-12-15 0:57 ` Paul Brook
2008-12-15 2:09 ` Anthony Liguori
2008-12-15 6:23 ` Avi Kivity
2008-12-15 18:35 ` Blue Swirl
2008-12-15 22:06 ` Anthony Liguori
2008-12-16 9:41 ` Avi Kivity
2008-12-16 16:55 ` Blue Swirl
2008-12-16 17:09 ` Avi Kivity
2008-12-16 17:48 ` Anthony Liguori
2008-12-16 18:11 ` Blue Swirl
2008-12-16 15:57 ` Blue Swirl
2008-12-16 16:29 ` Paul Brook
2008-12-16 16:35 ` Blue Swirl [this message]
2008-12-14 17:30 ` Jamie Lokier
2008-12-13 14:39 ` Andrea Arcangeli
2008-12-13 16:46 ` Anthony Liguori
2008-12-13 16:53 ` Andrea Arcangeli
2008-12-13 17:54 ` Andreas Färber
2008-12-13 21:11 ` Anthony Liguori
2008-12-14 16:47 ` Andrea Arcangeli
2008-12-14 17:01 ` Avi Kivity
2008-12-14 17:15 ` Andrea Arcangeli
2008-12-14 19:59 ` Avi Kivity
2008-12-22 16:44 ` Ian Jackson
2008-12-22 19:44 ` Avi Kivity
2008-12-23 0:03 ` Thiemo Seufer
2008-12-23 1:02 ` Andrea Arcangeli
2008-12-23 17:31 ` Avi Kivity
2008-12-22 19:46 ` Avi Kivity
2009-01-05 10:27 ` Gerd Hoffmann
2008-12-13 22:47 ` Anthony Liguori
2008-12-14 6:07 ` Avi Kivity
2008-12-12 18:16 ` [Qemu-devel] [PATCH 3 of 5] rename dma.c to isa_dma.c Andrea Arcangeli
2008-12-12 18:16 ` [Qemu-devel] [PATCH 4 of 5] dma api Andrea Arcangeli
2008-12-12 18:55 ` Blue Swirl
2008-12-12 18:16 ` [Qemu-devel] [PATCH 5 of 5] bdrv_aio_readv/writev Andrea Arcangeli
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