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| author | Jason Gunthorpe <jgunthorpe@obsidianresearch.com> | 2017-02-01 12:48:44 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-02-10 15:20:44 +0100 |
| commit | baa6d396635129d8a67793e884f3b2182c7354b3 (patch) | |
| tree | e836ac87b5a67011ef9f1c14d0443b4de8f9c309 /lib/radix-tree.c | |
| parent | b496df86ac1bbe393a55ddbfed35d46e74ef9767 (diff) | |
| download | linux-baa6d396635129d8a67793e884f3b2182c7354b3.tar.bz2 | |
fpga: Add scatterlist based programming
Requiring contiguous kernel memory is not a good idea, this is a limited
resource and allocation can fail under normal work loads.
This introduces a .write_sg op that supporting drivers can provide
to DMA directly from dis-contiguous memory and a new entry point
fpga_mgr_buf_load_sg that users can call to directly provide page
lists.
The full matrix of compatibility is provided, either the linear or sg
interface can be used by the user with a driver supporting either
interface.
A notable change for drivers is that the .write op can now be called
multiple times.
Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Acked-by: Alan Tull <atull@opensource.altera.com>
Acked-by: Moritz Fischer <moritz.fischer@ettus.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib/radix-tree.c')
0 files changed, 0 insertions, 0 deletions