void init_iova_domain(struct iova_domain *iovad, unsigned long pfn_32bit);
struct iova *find_iova(struct iova_domain *iovad, unsigned long pfn);
void put_iova_domain(struct iova_domain *iovad);
+struct iova *split_and_remove_iova(struct iova_domain *iovad,
+ struct iova *iova, unsigned long pfn_lo, unsigned long pfn_hi);
#endif