iosys-map: Add offset to iosys_map_memcpy_to()

In certain situations it's useful to be able to write to an offset of the mapping. Add a dst_offset to iosys_map_memcpy_to().

Lucas De Marchi committed 4 years ago

Commit cccd73d1 parent 2f8a6693 files · +11 −10Browse files

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 }
 /**
- * iosys_map_memcpy_to - Memcpy into iosys mapping
+ * iosys_map_memcpy_to - Memcpy into offset of iosys_map
  * @dst:	The iosys_map structure
+ * @dst_offset:	The offset from which to copy
  * @src:	The source buffer
  * @len:	The number of byte in src
  *
- * Copies data into a iosys mapping. The source buffer is in system
+ * Copies data into a iosys_map with an offset. The source buffer is in
- * memory. Depending on the buffer's location, the helper picks the correct
+ * system memory. Depending on the buffer's location, the helper picks the
- * method of accessing the memory.
+ * correct method of accessing the memory.
  */
-static inline void iosys_map_memcpy_to(struct iosys_map *dst, const void *src,
+static inline void iosys_map_memcpy_to(struct iosys_map *dst, size_t dst_offset,
-				       size_t len)
+				       const void *src, size_t len)
 {
 	if (dst->is_iomem)
-		memcpy_toio(dst->vaddr_iomem, src, len);
+		memcpy_toio(dst->vaddr_iomem + dst_offset, src, len);
 	else
-		memcpy(dst->vaddr, src, len);
+		memcpy(dst->vaddr + dst_offset, src, len);
 }
 /**

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