diff options
| author |   Ian Campbell <ian.campbell@citrix.com> | 2008-12-16 12:17:27 -0800 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-12-16 21:31:40 +0100 |
| commit | 0016fdee927f7aa0f428494bcf11ae60c7470a02 (patch) | |
| tree | ca1080f691efe9c6f76965d38fface872fb856ac /include/linux/swiotlb.h | |
| parent | swiotlb: allow architectures to override swiotlb pool allocation (diff) | |
| download | linux-dev-0016fdee927f7aa0f428494bcf11ae60c7470a02.tar.xz linux-dev-0016fdee927f7aa0f428494bcf11ae60c7470a02.zip | |
swiotlb: move some definitions to header
Impact: cleanup
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/swiotlb.h')
| -rw-r--r-- | include/linux/swiotlb.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h index b8c5fc766a56..58b996a642f9 100644 --- a/include/linux/swiotlb.h +++ b/include/linux/swiotlb.h @@ -7,6 +7,20 @@ struct device; struct dma_attrs; struct scatterlist; +/* + * Maximum allowable number of contiguous slabs to map, + * must be a power of 2. What is the appropriate value ? + * The complexity of {map,unmap}_single is linearly dependent on this value. + */ +#define IO_TLB_SEGSIZE 128 + + +/* + * log of the size of each IO TLB slab. The number of slabs is command line + * controllable. + */ +#define IO_TLB_SHIFT 11 + extern void swiotlb_init(void); |