renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-03 10:54:03 +08:00
Code

Documentation: DMA-API-HOWTO.txt: add multiple types of IOMMUs support

Browse Source 
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
FUJITA Tomonori 2010-08-10 18:03:25 -07:00 committed by Linus Torvalds
parent 3b9c6c11f5
commit c31e74c4c3
1 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
Documentation/DMA-API-HOWTO.txt
View File

@ -753,6 +753,16 @@ to "Closing".
alignment constraints (e.g. the alignment constraints about 64-bit
objects).
3) Supporting multiple types of IOMMUs
If your architecture needs to support multiple types of IOMMUs, you
can use include/linux/asm-generic/dma-mapping-common.h. It's a
library to support the DMA API with multiple types of IOMMUs. Lots
of architectures (x86, powerpc, sh, alpha, ia64, microblaze and
sparc) use it. Choose one to see how it can be used. If you need to
support multiple types of IOMMUs in a single system, the example of
x86 or powerpc helps.
Closing
This document, and the API itself, would not be in its current