diff options
| author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-08-23 21:55:26 +0400 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-09-17 18:14:54 +0400 |
| commit | 1cef36a529f44dbb3612ee0deeb0b5563de36163 (patch) | |
| tree | a5851da4d1ff6df0a1be05755205e01d33c9d20e /drivers/xen/swiotlb-xen.c | |
| parent | 74838b75379a53678ffc5f59de86161d21e2c808 (diff) | |
| download | linux-1cef36a529f44dbb3612ee0deeb0b5563de36163.tar.xz | |
xen/swiotlb: Move the nr_tbl determination in its own function.
Moving the function out of the way to prepare for the late
SWIOTLB init.
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/xen/swiotlb-xen.c')
| -rw-r--r-- | drivers/xen/swiotlb-xen.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index 1afb4fba11b4..a2aad6ec2401 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -144,25 +144,26 @@ 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; +} void __init xen_swiotlb_init(int verbose) { unsigned long bytes; int rc = -ENOMEM; - unsigned long nr_tbl; char *m = NULL; unsigned int repeat = 3; - nr_tbl = swiotlb_nr_tbl(); - if (nr_tbl) - xen_io_tlb_nslabs = nr_tbl; - else { - xen_io_tlb_nslabs = (64 * 1024 * 1024 >> IO_TLB_SHIFT); - xen_io_tlb_nslabs = ALIGN(xen_io_tlb_nslabs, IO_TLB_SEGSIZE); - } + xen_io_tlb_nslabs = swiotlb_nr_tbl(); retry: - bytes = xen_io_tlb_nslabs << IO_TLB_SHIFT; - + bytes = xen_set_nslabs(xen_io_tlb_nslabs); /* * Get IO TLB memory from any location. */ |