Messages in this thread | | | Subject | DMA from memory to local bus | Date | Fri, 28 Nov 2008 07:35:28 +0100 | From | "Hommel, Thomas (GE EntSol, Intelligent Platforms)" <> |
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Hi all, I'm currently developing a driver and want to make use of the DMA offload engine. Data has to be transferred from memory to a device on the local bus and vice versa. At a first look, the function dma_async_memcpy_buf_to_buf() seemed to be suitable, but it does not translate addresses correctly. Both addresses are treated as if they were in memory. In my configuration, the buffer is located in memory, but the device's I/O space is mapped into vmalloc space via ioremap(). How can I access the I/O space corectly from the DMA controller?
Thanks for your help Thomas
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