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swiotlb: move some definitions to header

Browse source 
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>
This commit is contained in:
Ian Campbell 2008-12-16 12:17:27 -08:00 committed by Ingo Molnar
parent 8c5df16bec
commit 0016fdee92
2 changed files with 15 additions and 13 deletions
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14
include/linux/swiotlb.h
View file

@ -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);

14
lib/swiotlb.c
View file

@ -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))
/*