linux-toradex.git/arch/mips/include/asm/dma-coherence.h, branch v4.4.80 Linux kernel for Apalis and Colibri modules MIPS: improve checks for noncoherent DMA 2014-01-22T19:43:10+00:00 Felix Fietkau nbd@openwrt.org 2013-09-27T12:41:44+00:00 885014bcf284cdfbe3428f2cfa3882edde5ff5fa Only one MIPS development board actually supports enabling/disabling DMA coherency at runtime, so it's not a good idea to push the overhead of checking that configuration setting onto every other supported target as well. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: John Crispin <blogic@openwrt.org> Patchwork: http://patchwork.linux-mips.org/patch/5912/ 
Only one MIPS development board actually supports enabling/disabling DMA
coherency at runtime, so it's not a good idea to push the overhead of
checking that configuration setting onto every other supported target as
well.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/5912/
MIPS: Add option to disable software I/O coherency. 2013-05-01T21:32:49+00:00 Steven J. Hill Steven.Hill@imgtec.com 2013-03-25T18:47:29+00:00 b6d92b4a6bdb880b39789c677b952c53a437028d Some MIPS controllers have hardware I/O coherency. This patch detects those and turns off software coherency. A new kernel command line option also allows the user to manually turn software coherency on or off. Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com> 
Some MIPS controllers have hardware I/O coherency. This patch
detects those and turns off software coherency. A new kernel
command line option also allows the user to manually turn
software coherency on or off.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>