From mboxrd@z Thu Jan  1 00:00:00 1970
From: Avi Kivity <avi@qumranet.com>
Subject: Re: [PATCH 2/6] PCI DMA API
Date: Sun, 30 Mar 2008 13:25:30 +0300
Message-ID: <47EF6A9A.3090709@qumranet.com>
References: <1206827760-4566-1-git-send-email-aliguori@us.ibm.com>
	<1206827760-4566-2-git-send-email-aliguori@us.ibm.com>
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Cc: kvm-devel@lists.sourceforge.net,
	Marcelo Tosatti <marcelo@kvack.org>, qemu-devel@nongnu.org,
	Aurelien Jarno <aurelien@aurel32.net>
To: Anthony Liguori <aliguori@us.ibm.com>
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Anthony Liguori wrote:
> This patch introduces a PCI DMA API and some generic code to support other DMA
> APIs.  Two types are introduced: PhysIOVector and IOVector.  A DMA API
> maps a PhysIOVector, which is composed of target_phys_addr_t, into an IOVector,
> which is composed of void *.
>
> This enables zero-copy IO to be preformed without introducing assumptions of
> phys_ram_base.  This API is at the PCI device level to enable support of
> per-device IOMMU remapping.
>
>
> +
> +typedef struct IOVector
> +{
> +    int num;
> +    struct IOVectorElement {
> +	void *base;
> +	size_t len;
> +    } sg[0];
> +} IOVector;
> +
>   

Can we use 'struct iovec' for the element type (with accessors for 
setting base+len, and reading base or len, so we can substitute the 
Windows version for that platform)? That will allow using the vector 
without additional translation or casts.

-- 
error compiling committee.c: too many arguments to function


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