Messages in this thread | | | From | Gerd Knorr <> | Subject | Re: Process memory DMA access from devices, kiobuf ? | Date | 8 Mar 2001 18:53:28 GMT |
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Terry Barnaby wrote: > Hi, > > We are doing work with FPGA's and have a Linux driver for a particular > board that has these > devices. For performance reasons the driver has the ability to DMA > directly to process (user) > memory. We have made use of the kiobuf routines such as > "map_user_kiobuf()" to map into > physical memory the user address space. > I note that the RedHat kernels have a patched kernel containing the > kiobuf code but the > standard linux source does not right up to 2.4.2.
Huh? map_user_kiobuf() _is_ present in 2.4.2. See include/linux/iobuf.h
Gerd
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