We introduce the io_remap*() equivalents of remap_pfn_range_prepare() and remap_pfn_range_complete() to allow for I/O remapping via mmap_prepare.
Make these internal to mm, as they should only be used by internal helpers. Signed-off-by: Lorenzo Stoakes <[email protected]> Reviewed-by: Jason Gunthorpe <[email protected]> --- mm/internal.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/mm/internal.h b/mm/internal.h index c6655f76cf69..085e34f84bae 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -1657,4 +1657,22 @@ void remap_pfn_range_prepare(struct vm_area_desc *desc, unsigned long pfn); int remap_pfn_range_complete(struct vm_area_struct *vma, unsigned long addr, unsigned long pfn, unsigned long size, pgprot_t pgprot); +static inline void io_remap_pfn_range_prepare(struct vm_area_desc *desc, + unsigned long orig_pfn, unsigned long size) +{ + const unsigned long pfn = io_remap_pfn_range_pfn(orig_pfn, size); + + return remap_pfn_range_prepare(desc, pfn); +} + +static inline int io_remap_pfn_range_complete(struct vm_area_struct *vma, + unsigned long addr, unsigned long orig_pfn, unsigned long size, + pgprot_t orig_prot) +{ + const unsigned long pfn = io_remap_pfn_range_pfn(orig_pfn, size); + const pgprot_t prot = io_remap_pfn_range_prot(orig_prot); + + return remap_pfn_range_complete(vma, addr, pfn, size, prot); +} + #endif /* __MM_INTERNAL_H */ -- 2.51.0
