From: Paolo Bonzini <pbonzini@redhat.com>
To: Kevin Wolf <kwolf@redhat.com>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH 2/5] dma-helpers: allow including from target-independent code
Date: Fri, 09 Sep 2011 13:53:30 +0200 [thread overview]
Message-ID: <4E69FE3A.3010307@redhat.com> (raw)
In-Reply-To: <4E69FAF0.3040308@redhat.com>
On 09/09/2011 01:39 PM, Kevin Wolf wrote:
> Am 07.09.2011 17:20, schrieb Paolo Bonzini:
>> Target-independent code cannot construct sglists, but it can take
>> them from the outside as a black box. Allow this.
>>
>> Signed-off-by: Paolo Bonzini<pbonzini@redhat.com>
>
> I was hoping to find the use case for this somewhere in the rest of the
> series, but there doesn't seem to be an example.
Indeed, unfortunately not yet.
> How can you make use of the dma.h functions when you can't build a
> QEMUSGList? Or would you have a target-dependent part that builds it and
> passes it to a target-independent part?
Exactly, scsi-disk/scsi-bus will pick the QEMUSGList from the HBA and
treat it opaquely.
Paolo
next prev parent reply other threads:[~2011-09-09 11:53 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-07 15:20 [Qemu-devel] [PATCH 0/5] block: preparatory patches for scatter/gather support Paolo Bonzini
2011-09-07 15:20 ` [Qemu-devel] [PATCH 1/5] dma-helpers: rename is_write to to_dev Paolo Bonzini
2011-09-09 11:31 ` Kevin Wolf
2011-09-07 15:20 ` [Qemu-devel] [PATCH 2/5] dma-helpers: allow including from target-independent code Paolo Bonzini
2011-09-09 11:39 ` Kevin Wolf
2011-09-09 11:53 ` Paolo Bonzini [this message]
2011-09-07 15:21 ` [Qemu-devel] [PATCH 3/5] dma-helpers: rewrite completion/cancellation Paolo Bonzini
2011-09-09 12:14 ` Kevin Wolf
2011-09-09 12:43 ` Paolo Bonzini
2011-09-09 12:59 ` Kevin Wolf
2011-09-09 13:12 ` Paolo Bonzini
2011-09-09 13:34 ` Kevin Wolf
2011-09-09 13:43 ` Paolo Bonzini
2011-09-07 15:21 ` [Qemu-devel] [PATCH 4/5] scsi-disk: commonize iovec creation between reads and writes Paolo Bonzini
2011-09-07 15:21 ` [Qemu-devel] [PATCH 5/5] scsi-disk: lazily allocate bounce buffer Paolo Bonzini
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