linux-kernel - Re: [HOWTO] accessing the DMA mapped data

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Message-ID: <ada4pmk1qkz.fsf@cisco.com>
Date:	Thu, 10 May 2007 11:27:56 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	Mahesh <maheshk@...c.in>
Cc:	David Miller <davem@...emloft.net>, linux-kernel@...r.kernel.org,
	kernelnewbies@...linux.org, general@...ts.openfabrics.org
Subject: Re: [HOWTO] accessing the DMA mapped data

 > Here I am dealing with a infiniband (see www.openfabrics.org)
 > network device driver. The layer above the driver is the standard
 > infiniband core interface. Now I have a situation where I need to
 > peek into the packets and do some modifications(some hacking). So I
 > just want know whether I can access the original data region using
 > the bus address generated by the dma_map_single.

If you give more details about what you're trying to do, maybe I can
suggest a good way to accomplish it.

Also for IB-related stuff you may want to at least CC
<general@...ts.openfabrics.org> to get the best info.
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