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-rw-r--r--include/linux/iova.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/iova.h b/include/linux/iova.h
index 3277f4711349..19e81d5ccb6d 100644
--- a/include/linux/iova.h
+++ b/include/linux/iova.h
@@ -34,6 +34,11 @@ struct iova_domain {
unsigned long dma_32bit_pfn;
};
+static inline unsigned long iova_size(struct iova *iova)
+{
+ return iova->pfn_hi - iova->pfn_lo + 1;
+}
+
struct iova *alloc_iova_mem(void);
void free_iova_mem(struct iova *iova);
void free_iova(struct iova_domain *iovad, unsigned long pfn);