From: Steve Wise <swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
To: Dan Carpenter <dan.carpenter-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Roland Dreier <roland-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Subject: Re: RDMA/cxgb4: Support on-chip SQs
Date: Sat, 23 Mar 2013 17:54:35 -0500 [thread overview]
Message-ID: <514E32AB.3060309@opengridcomputing.com> (raw)
In-Reply-To: <20130323213038.GA14080@mwanda>
On 3/23/2013 4:30 PM, Dan Carpenter wrote:
> On Wed, Jan 30, 2013 at 03:36:48PM -0600, Steve Wise wrote:
>> I wonder, then, what the correct service is to get the cpu physical
>> address from a kernel virtual address returned from
>> dma_alloc_coherent()? I think this is correct as-is, since I think
>> dma_alloc_coherent() falls under the "directly mapped" addresses in
>> the virt_to_phys() prototype comment.
>>
>> What do you think Roland?
> In the end, we decided this was correct as-is?
I think the code is correct as-is.
> I'm about to complain to the caif network people about the
> dma_alloc_coherent() -> virt_to_phys() thing, but the truth is I
> don't understand this stuff very well and I'm not sure when it's ok
> or not.
>
> regards,
> dan carpenter
>
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next prev parent reply other threads:[~2013-03-23 22:54 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-30 21:00 RDMA/cxgb4: Support on-chip SQs Dan Carpenter
[not found] ` <20130130210006.GA22134-mgFCXtclrQlZLf2FXnZxJA@public.gmane.org>
2013-01-30 21:36 ` Steve Wise
[not found] ` <51099270.5070406-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2013-01-30 21:44 ` Jason Gunthorpe
[not found] ` <20130130214425.GA5674-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2013-01-30 21:51 ` Steve Wise
[not found] ` <510995DC.4020602-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2013-01-30 22:18 ` Jason Gunthorpe
2013-01-30 22:34 ` Roland Dreier
[not found] ` <CAL1RGDXQW44TTaCZ0rzBAXG1oK3EsiKJXj5+cA1jUJHb85VFNQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-01-30 22:49 ` Steve Wise
2013-01-30 21:45 ` Dan Carpenter
2013-01-30 21:52 ` Steve Wise
[not found] ` <51099622.40505-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2013-01-30 22:17 ` Steve Wise
2013-03-23 21:30 ` Dan Carpenter
2013-03-23 22:54 ` Steve Wise [this message]
2013-03-25 16:14 ` Roland Dreier
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