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Hello,
I am writing a driver for a PCI data acquisition board for the 2.6 kernel. My board has DMA capability and generates an interrupt when it has completed a DMA transfer. Once the data is buffered I want a user-space process to perform signal processing operations on the data. Can anyone offer advice on how to accomplish the following?
Obviously in order to do a DMA transfer the board needs the address of a DMA destination buffer. If a user-space process is to access the data this DMA buffer must be in user space. How can I pass a user-space address to my PCI driver. Can a user-space process call a driver function and pass this address as an argument?
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