Messages in this thread | | | Date | Thu, 10 May 2007 16:49:03 +0530 | From | Mahesh <> | Subject | Re: [HOWTO] accessing the DMA mapped data |
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Hi Miller,
Thanks for replying. > You can eithe keep track of this yourself, or (depending upon > your usage) you might be able to use DMA pools, see > dma_pool_create() and friends. > I think you have not understood my question properly. My problem is, the layer above the driver will do dma_map_single on a kmalloc'ed buffer and passes the result (bus address) to the device driver. Now the driver has to modify the contents of the the original buffer. Is it possible to do that ??
-regards, Mahesh
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