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Diffstat (limited to 'include/linux/iova.h')
-rw-r--r--include/linux/iova.h91
1 files changed, 91 insertions, 0 deletions
diff --git a/include/linux/iova.h b/include/linux/iova.h
index f27bb2c62fca..e0a892ae45c0 100644
--- a/include/linux/iova.h
+++ b/include/linux/iova.h
@@ -82,6 +82,7 @@ static inline unsigned long iova_pfn(struct iova_domain *iovad, dma_addr_t iova)
return iova >> iova_shift(iovad);
}
+#if IS_ENABLED(CONFIG_IOMMU_IOVA)
int iova_cache_get(void);
void iova_cache_put(void);
@@ -106,5 +107,95 @@ 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);
void free_cpu_cached_iovas(unsigned int cpu, struct iova_domain *iovad);
+#else
+static inline int iova_cache_get(void)
+{
+ return -ENOTSUPP;
+}
+
+static inline void iova_cache_put(void)
+{
+}
+
+static inline struct iova *alloc_iova_mem(void)
+{
+ return NULL;
+}
+
+static inline void free_iova_mem(struct iova *iova)
+{
+}
+
+static inline void free_iova(struct iova_domain *iovad, unsigned long pfn)
+{
+}
+
+static inline void __free_iova(struct iova_domain *iovad, struct iova *iova)
+{
+}
+
+static inline struct iova *alloc_iova(struct iova_domain *iovad,
+ unsigned long size,
+ unsigned long limit_pfn,
+ bool size_aligned)
+{
+ return NULL;
+}
+
+static inline void free_iova_fast(struct iova_domain *iovad,
+ unsigned long pfn,
+ unsigned long size)
+{
+}
+
+static inline unsigned long alloc_iova_fast(struct iova_domain *iovad,
+ unsigned long size,
+ unsigned long limit_pfn)
+{
+ return 0;
+}
+
+static inline struct iova *reserve_iova(struct iova_domain *iovad,
+ unsigned long pfn_lo,
+ unsigned long pfn_hi)
+{
+ return NULL;
+}
+
+static inline void copy_reserved_iova(struct iova_domain *from,
+ struct iova_domain *to)
+{
+}
+
+static inline void init_iova_domain(struct iova_domain *iovad,
+ unsigned long granule,
+ unsigned long start_pfn,
+ unsigned long pfn_32bit)
+{
+}
+
+static inline struct iova *find_iova(struct iova_domain *iovad,
+ unsigned long pfn)
+{
+ return NULL;
+}
+
+static inline void put_iova_domain(struct iova_domain *iovad)
+{
+}
+
+static inline struct iova *split_and_remove_iova(struct iova_domain *iovad,
+ struct iova *iova,
+ unsigned long pfn_lo,
+ unsigned long pfn_hi)
+{
+ return NULL;
+}
+
+static inline void free_cpu_cached_iovas(unsigned int cpu,
+ struct iova_domain *iovad)
+{
+}
+#endif
#endif