Messages in this thread |  | | Date | Thu, 08 Mar 2001 09:21:53 +0000 | From | Terry Barnaby <> | Subject | Process memory DMA access from devices, kiobuf ? |
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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. Is there a better recommended way to perform DMA access to user memory from a device using the Linux kernel ?
Cheers
Terry
-- Dr Terry Barnaby BEAM Ltd Phone: +44 1454 324512 Northavon Business Center, Dean Rd Fax: +44 1454 313172 Yate, Bristol, BS37 5NH, UK Email: terry@beam.demon.co.uk Web: www.beam.demon.co.uk BEAM for: Visually Impaired X-Terminals, Parallel Processing, Software Dev "Tandems are twice the fun !"
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