diff options
| -rw-r--r-- | include/linux/swiotlb.h | 14 | ||||
| -rw-r--r-- | lib/swiotlb.c | 14 |
2 files changed, 15 insertions, 13 deletions
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h index b8c5fc7..58b996a 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); diff --git a/lib/swiotlb.c b/lib/swiotlb.c index abecb28..db724ba 100644 --- a/lib/swiotlb.c +++ b/lib/swiotlb.c @@ -23,6 +23,7 @@ #include <linux/spinlock.h> #include <linux/swiotlb.h> #include <linux/string.h> +#include <linux/swiotlb.h> #include <linux/types.h> #include <linux/ctype.h> @@ -40,19 +41,6 @@ #define SG_ENT_VIRT_ADDRESS(sg) (sg_virt((sg))) #define SG_ENT_PHYS_ADDRESS(sg) virt_to_bus(SG_ENT_VIRT_ADDRESS(sg)) -/* - * 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 - #define SLABS_PER_PAGE (1 << (PAGE_SHIFT - IO_TLB_SHIFT)) /* |