> Hi all, > What is the difference between the following memory allocations. > > 1) Memory allocation by doing, > char *buf; > buf = kmalloc(BUF_LEN, GFP_DMA | GFP_KERNEL); > > 2) And by > char *buf; > buf = dma_alloc(...); > > in the link http://www.arm.linux.org.uk/developer/memory.txt > it says that dma_alloc() returns virtual address in "ffc00000-----fffeffff" > this region, > > while in the first case it is returning Virtual address in "low-memory" > region. > > For DMA mappable memory which one we should use..? > Hi Sandeep Please have a look at these two API;s below. http://lxr.linux.no/#linux+v3.0/Documentation/DMA-API-HOWTO.txt http://lxr.linux.no/#linux+v3.0/Documentation/DMA-API.txt -- Warm Regards, Ravi Kulkarni _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
