summaryrefslogtreecommitdiff
path: root/include/linux/dma-mapping.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/dma-mapping.h')
-rw-r--r--include/linux/dma-mapping.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 91b761846061..c5ac9d49cc06 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -232,4 +232,20 @@ struct dma_attrs;
#endif /* CONFIG_HAVE_DMA_ATTRS */
+#ifdef CONFIG_NEED_DMA_MAP_STATE
+#define DEFINE_DMA_UNMAP_ADDR(ADDR_NAME) dma_addr_t ADDR_NAME
+#define DEFINE_DMA_UNMAP_LEN(LEN_NAME) __u32 LEN_NAME
+#define dma_unmap_addr(PTR, ADDR_NAME) ((PTR)->ADDR_NAME)
+#define dma_unmap_addr_set(PTR, ADDR_NAME, VAL) (((PTR)->ADDR_NAME) = (VAL))
+#define dma_unmap_len(PTR, LEN_NAME) ((PTR)->LEN_NAME)
+#define dma_unmap_len_set(PTR, LEN_NAME, VAL) (((PTR)->LEN_NAME) = (VAL))
+#else
+#define DEFINE_DMA_UNMAP_ADDR(ADDR_NAME)
+#define DEFINE_DMA_UNMAP_LEN(LEN_NAME)
+#define dma_unmap_addr(PTR, ADDR_NAME) (0)
+#define dma_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
+#define dma_unmap_len(PTR, LEN_NAME) (0)
+#define dma_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0)
+#endif
+
#endif