swiotlb: Expose swiotlb_nr_tlb function to modules
As a mechanism to detect whether SWIOTLB is enabled or not.
We also fix the spelling - it was swioltb instead of
swiotlb.
CC: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
[v1: Ripped out swiotlb_enabled]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 8e964b9..4864e5d 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -153,7 +153,7 @@
char *m = NULL;
unsigned int repeat = 3;
- nr_tbl = swioltb_nr_tbl();
+ nr_tbl = swiotlb_nr_tbl();
if (nr_tbl)
xen_io_tlb_nslabs = nr_tbl;
else {
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 445702c..e872526 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -24,7 +24,7 @@
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);
+extern unsigned long swiotlb_nr_tbl(void);
/*
* Enumeration for sync targets
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 99093b3..058935e 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -110,11 +110,11 @@
__setup("swiotlb=", setup_io_tlb_npages);
/* make io_tlb_overflow tunable too? */
-unsigned long swioltb_nr_tbl(void)
+unsigned long swiotlb_nr_tbl(void)
{
return io_tlb_nslabs;
}
-
+EXPORT_SYMBOL_GPL(swiotlb_nr_tbl);
/* Note that this doesn't work with highmem page */
static dma_addr_t swiotlb_virt_to_bus(struct device *hwdev,
volatile void *address)
@@ -321,6 +321,7 @@
free_bootmem_late(__pa(io_tlb_start),
PAGE_ALIGN(io_tlb_nslabs << IO_TLB_SHIFT));
}
+ io_tlb_nslabs = 0;
}
static int is_swiotlb_buffer(phys_addr_t paddr)