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author | Ian Campbell <ian.campbell@citrix.com> | 2008-12-16 12:17:27 -0800 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-12-16 21:31:40 +0100 |
commit | 0016fdee927f7aa0f428494bcf11ae60c7470a02 (patch) | |
tree | ca1080f691efe9c6f76965d38fface872fb856ac /include/linux/swiotlb.h | |
parent | 8c5df16bec8a60bb8589fc232b9e26cac0ed4b2c (diff) | |
download | linux-stable-0016fdee927f7aa0f428494bcf11ae60c7470a02.tar.gz linux-stable-0016fdee927f7aa0f428494bcf11ae60c7470a02.tar.bz2 linux-stable-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); |