1 files changed, 17 insertions, 1 deletions
diff --git a/sys/ia64/include/bus.h b/sys/ia64/include/bus.h
index bc15d08..7a5c0f4 100644
--- a/sys/ia64/include/bus.h
+++ b/sys/ia64/include/bus.h
@@ -905,6 +905,17 @@ typedef struct bus_dma_segment {
 typedef int bus_dma_filter_t(void *, bus_addr_t);
 
 /*
+ * A function that performs driver-specific syncronization on behalf of
+ * busdma.
+ */
+typedef enum {
+	BUS_DMA_LOCK	= 0x01,
+	BUS_DMA_UNLOCK	= 0x02,
+} bus_dma_lock_op_t;
+
+typedef void bus_dma_lock_t(void *, bus_dma_lock_op_t);
+   
+/*
  * Allocate a device specific dma_tag encapsulating the constraints of
  * the parent tag in addition to other restrictions specified:
  *
@@ -928,7 +939,8 @@ typedef int bus_dma_filter_t(void *, bus_addr_t);
 int bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignemnt,
     bus_size_t boundary, bus_addr_t lowaddr, bus_addr_t highaddr,
     bus_dma_filter_t *filtfunc, void *filtfuncarg, bus_size_t maxsize,
-    int nsegments, bus_size_t maxsegsz, int flags, bus_dma_tag_t *dmat);
+    int nsegments, bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc,
+    void *lockfuncarg, bus_dma_tag_t *dmat);
 
 int bus_dma_tag_destroy(bus_dma_tag_t dmat);
 
@@ -1016,4 +1028,8 @@ bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t dmamap)
 		_bus_dmamap_unload(dmat, dmamap);
 }
 
+/*
+ * Generic helper function for manipulating mutexes.
+ */
+void busdma_lock_mutex(void *arg, bus_dma_lock_op_t op);
 #endif /* _MACHINE_BUS_H_ */