Messages in this thread | | | Subject | RE: [PATCH 1/2] misc: add CARMA DATA-FPGA Access Driver | Date | Wed, 9 Feb 2011 16:30:23 -0000 | From | "David Laight" <> |
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> This driver allows userspace to access the data processing > FPGAs on the OVRO CARMA board. It has two modes of operation: > > 1) random access > > This allows users to poke any DATA-FPGA registers by using mmap to map > the address region directly into their memory map.
I needed something similar, but used pread() and pwrite() to request the transfers. While this does require a system call per transfer, it allows the driver to use dma (if available) to speed up the request. In my case doing single cycle transfers would be too slow.
David
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