linux-kernel - Re: [PATCH 2/6] swiotlb: swiotlb_tbl_map_single: abstract out swiotlb_virt_to

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Message-ID: <20100510193118.GA5906@phenom.dumpdata.com>
Date:	Mon, 10 May 2010 15:31:18 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Cc:	linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
	albert_herranz@...oo.es, linux@...elenboom.it, chrisw@...s-sol.org,
	Ian.Campbell@...citrix.com, jeremy@...p.org, dwmw2@...radead.org,
	alex.williamson@...com
Subject: Re: [PATCH 2/6] swiotlb: swiotlb_tbl_map_single: abstract out
	swiotlb_virt_to_bus calls out.

On Sun, May 09, 2010 at 10:41:15PM +0900, FUJITA Tomonori wrote:
> On Wed,  7 Apr 2010 16:29:26 -0400
> Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> wrote:
> 
> > We want to move that function out of swiotlb_tbl_map_single so that the caller
> > of this function does the virt->phys->bus address translation.
> > 
> > Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> > ---
> >  lib/swiotlb.c |   22 ++++++++++++++--------
> >  1 files changed, 14 insertions(+), 8 deletions(-)
> 
> It would be better to do something like that instead of spreading
> swiotlb_virt_to_bus()?

Yes! Thought I am confused by the name. In the past you mentioned 'tbl',
but here it is 'tlb'. I presume 'tbl' is the right one?

> Subject: [PATCH] swiotlb: add swiotlb_tlb_map_single library function
> 
> swiotlb_tlb_map_single() takes the dma address of iotlb instead of
> using swiotlb_virt_to_bus().
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