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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2011-06-05 11:47:29 +0900
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2011-06-06 15:41:16 -0400
commit5f98ecdbcef1920323d8777c0ba55dbd4335d3cf (patch)
treed154f6bfe3b4af80ca130328a50004a3ea344c09 /include/linux/swiotlb.h
parent61c4f2c81c61f73549928dfd9f3e8f26aa36a8cf (diff)
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swiotlb: Export swioltb_nr_tbl and utilize it as appropiate.
By default the io_tlb_nslabs is set to zero, and gets set to whatever value is passed in via swiotlb_init_with_tbl function. The default value passed in is 64MB. However, if the user provides the 'swiotlb=<nslabs>' the default value is ignored and the value provided by the user is used... Except when the SWIOTLB is used under Xen - there the default value of 64MB is used and the Xen-SWIOTLB has no mechanism to get the 'io_tlb_nslabs' filled out by setup_io_tlb_npages functions. This patch provides a function for the Xen-SWIOTLB to call to see if the io_tlb_nslabs is set and if so use that value. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'include/linux/swiotlb.h')
-rw-r--r--include/linux/swiotlb.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 8c0e349f4a6c..445702c60d04 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -24,6 +24,7 @@ extern int swiotlb_force;
extern void swiotlb_init(int verbose);
extern void swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose);
+extern unsigned long swioltb_nr_tbl(void);
/*
* Enumeration for sync targets
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