@@ -138,16 +138,6 @@ xen_swiotlb_fixup(void *buf, size_t size, unsigned long nslabs)
} while (i < nslabs);
return 0;
}
-static unsigned long xen_set_nslabs(unsigned long nr_tbl)
-{
- if (!nr_tbl) {
- xen_io_tlb_nslabs = (64 * 1024 * 1024 >> IO_TLB_SHIFT);
- xen_io_tlb_nslabs = ALIGN(xen_io_tlb_nslabs, IO_TLB_SEGSIZE);
- } else
- xen_io_tlb_nslabs = nr_tbl;
-
- return xen_io_tlb_nslabs << IO_TLB_SHIFT;
-}
enum xen_swiotlb_err {
XEN_SWIOTLB_UNKNOWN = 0,
@@ -170,6 +160,9 @@ static const char *xen_swiotlb_error(enum xen_swiotlb_err err)
}
return "";
}
+
+#define DEFAULT_NSLABS ALIGN(SZ_64M >> IO_TLB_SHIFT, IO_TLB_SEGSIZE)
+
int __ref xen_swiotlb_init(int verbose, bool early)
{
unsigned long bytes, order;
@@ -179,8 +172,10 @@ int __ref xen_swiotlb_init(int verbose, bool early)
xen_io_tlb_nslabs = swiotlb_nr_tbl();
retry:
- bytes = xen_set_nslabs(xen_io_tlb_nslabs);
- order = get_order(xen_io_tlb_nslabs << IO_TLB_SHIFT);
+ if (!xen_io_tlb_nslabs)
+ xen_io_tlb_nslabs = DEFAULT_NSLABS;
+ bytes = xen_io_tlb_nslabs << IO_TLB_SHIFT;
+ order = get_order(bytes);
/*
* IO TLB memory already allocated. Just use it.
The xen_set_nslabs function is a little weird, as it has just one caller, that caller passes a global variable as the argument, which is then overriden in the function and a derivative of it returned. Just add a cpp symbol for the default size using a readable constant and open code the remaining three lines in the caller. Signed-off-by: Christoph Hellwig <hch@lst.de> --- drivers/xen/swiotlb-xen.c | 19 +++++++------------ 1 file changed, 7 insertions(+), 12 deletions(-)