On Wed, 2006-02-22 at 06:14 -0800, munees waran wrote:
> Hi,
>
> I am writing PCI device driver in linux, where I need to do DMA
> operation.
>
> While transferring data from memory to IO or IO to memory, only source
> address is specified in API call. How destination address will be
> specified ?
>
> int dad_dma_prepare(int channel, int mode, unsigned int buf,
> unsigned int count)
> {
> unsigned long flags;
> flags = claim_dma_lock( );
> disable_dma(channel);
> clear_dma_ff(channel);
> set_dma_mode(channel, mode);
> set_dma_addr(channel, virt_to_bus(buf));
> set_dma_count(channel, count);
> enable_dma(channel);
> release_dma_lock(flags);
you are aware that this is the old ISA bus dma api, not the PCI one?
Please see Documentation/dma-mapping.txt for the PCI bus DMA api!
>
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