Change the operation parameter of bus_dmamap_sync() from an

enum to an int and redefine the BUS_DMASYNC_* constants as
flags.  This allows us to specify several operations in one
call to bus_dmamap_sync() as in NetBSD.

14 files changed, 60 insertions, 116 deletions

diff --git a/sys/alpha/alpha/busdma_machdep.c b/sys/alpha/alpha/busdma_machdep.c
index e2000cb..90a9389 100644
--- a/sys/alpha/alpha/busdma_machdep.c
+++ b/sys/alpha/alpha/busdma_machdep.c
@@ -787,7 +787,7 @@ _bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map)
 }
 
 void
-_bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op)
+_bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, int op)
 {
 	struct bounce_page *bpage;
 
@@ -798,28 +798,22 @@ _bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op)
 		 * want to add support for invalidating
 		 * the caches on broken hardware
 		 */
-		switch (op) {
-		case BUS_DMASYNC_PREWRITE:
+		if (op & BUS_DMASYNC_PREWRITE) {
 			while (bpage != NULL) {
 				bcopy((void *)bpage->datavaddr,
 				      (void *)bpage->vaddr,
 				      bpage->datacount);
 				bpage = STAILQ_NEXT(bpage, links);
 			}
-			break;
+		}
 
-		case BUS_DMASYNC_POSTREAD:
+		if (op & BUS_DMASYNC_POSTREAD) {
 			while (bpage != NULL) {
 				bcopy((void *)bpage->vaddr,
 				      (void *)bpage->datavaddr,
 				      bpage->datacount);
 				bpage = STAILQ_NEXT(bpage, links);
 			}
-			break;
-		case BUS_DMASYNC_PREREAD:
-		case BUS_DMASYNC_POSTWRITE:
-			/* No-ops */
-			break;
 		}
 	}
 }
diff --git a/sys/alpha/include/bus.h b/sys/alpha/include/bus.h
index dd92cf2..859adc2 100644
--- a/sys/alpha/include/bus.h
+++ b/sys/alpha/include/bus.h
@@ -480,16 +480,12 @@ struct mbuf;
 struct uio;
 
 /*
- *	bus_dmasync_op_t
- *
  *	Operations performed by bus_dmamap_sync().
  */
-typedef enum {
-	BUS_DMASYNC_PREREAD,
-	BUS_DMASYNC_POSTREAD,
-	BUS_DMASYNC_PREWRITE,
-	BUS_DMASYNC_POSTWRITE
-} bus_dmasync_op_t;
+#define	BUS_DMASYNC_PREREAD	1
+#define	BUS_DMASYNC_POSTREAD	2
+#define	BUS_DMASYNC_PREWRITE	4
+#define	BUS_DMASYNC_POSTWRITE	8
 
 /*
  *	bus_dma_tag_t
@@ -625,7 +621,7 @@ int bus_dmamap_load_uio(bus_dma_tag_t dmat, bus_dmamap_t map,
 /*
  * Perform a syncronization operation on the given map.
  */
-void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_dmasync_op_t);
+void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, int);
 #define bus_dmamap_sync(dmat, dmamap, op) 		\
 	if ((dmamap) != NULL)				\
 		_bus_dmamap_sync(dmat, dmamap, op)
diff --git a/sys/amd64/amd64/busdma_machdep.c b/sys/amd64/amd64/busdma_machdep.c
index 3d4083e..00dd8ce 100644
--- a/sys/amd64/amd64/busdma_machdep.c
+++ b/sys/amd64/amd64/busdma_machdep.c
@@ -784,39 +784,32 @@ _bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map)
 }
 
 void
-_bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op)
+_bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, int op)
 {
 	struct bounce_page *bpage;
 
 	if ((bpage = STAILQ_FIRST(&map->bpages)) != NULL) {
-		
 		/*
 		 * Handle data bouncing.  We might also
 		 * want to add support for invalidating
 		 * the caches on broken hardware
 		 */
-		switch (op) {
-		case BUS_DMASYNC_PREWRITE:
+		if (op & BUS_DMASYNC_PREWRITE) {
 			while (bpage != NULL) {
 				bcopy((void *)bpage->datavaddr,
 				      (void *)bpage->vaddr,
 				      bpage->datacount);
 				bpage = STAILQ_NEXT(bpage, links);
 			}
-			break;
+		}
 
-		case BUS_DMASYNC_POSTREAD:
+		if (op & BUS_DMASYNC_POSTREAD) {
 			while (bpage != NULL) {
 				bcopy((void *)bpage->vaddr,
 				      (void *)bpage->datavaddr,
 				      bpage->datacount);
 				bpage = STAILQ_NEXT(bpage, links);
 			}
-			break;
-		case BUS_DMASYNC_PREREAD:
-		case BUS_DMASYNC_POSTWRITE:
-			/* No-ops */
-			break;
 		}
 	}
 }
diff --git a/sys/amd64/include/bus_dma.h b/sys/amd64/include/bus_dma.h
index 4a1740d..f9471c0 100644
--- a/sys/amd64/include/bus_dma.h
+++ b/sys/amd64/include/bus_dma.h
@@ -89,16 +89,12 @@ struct mbuf;
 struct uio;
 
 /*
- *	bus_dmasync_op_t
- *
- *	Operations performed by bus_dmamap_sync().
+ * Operations performed by bus_dmamap_sync().
  */
-typedef enum {
-	BUS_DMASYNC_PREREAD,
-	BUS_DMASYNC_POSTREAD,
-	BUS_DMASYNC_PREWRITE,
-	BUS_DMASYNC_POSTWRITE
-} bus_dmasync_op_t;
+#define	BUS_DMASYNC_PREREAD	1
+#define	BUS_DMASYNC_POSTREAD	2
+#define	BUS_DMASYNC_PREWRITE	4
+#define	BUS_DMASYNC_POSTWRITE	8
 
 /*
  *	bus_dma_tag_t
@@ -234,7 +230,7 @@ int bus_dmamap_load_uio(bus_dma_tag_t dmat, bus_dmamap_t map,
 /*
  * Perform a syncronization operation on the given map.
  */
-void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_dmasync_op_t);
+void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, int);
 #define bus_dmamap_sync(dmat, dmamap, op) 		\
 	if ((dmamap) != NULL)				\
 		_bus_dmamap_sync(dmat, dmamap, op)
diff --git a/sys/i386/i386/busdma_machdep.c b/sys/i386/i386/busdma_machdep.c
index 3d4083e..00dd8ce 100644
--- a/sys/i386/i386/busdma_machdep.c
+++ b/sys/i386/i386/busdma_machdep.c
@@ -784,39 +784,32 @@ _bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map)
 }
 
 void
-_bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op)
+_bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, int op)
 {
 	struct bounce_page *bpage;
 
 	if ((bpage = STAILQ_FIRST(&map->bpages)) != NULL) {
-		
 		/*
 		 * Handle data bouncing.  We might also
 		 * want to add support for invalidating
 		 * the caches on broken hardware
 		 */
-		switch (op) {
-		case BUS_DMASYNC_PREWRITE:
+		if (op & BUS_DMASYNC_PREWRITE) {
 			while (bpage != NULL) {
 				bcopy((void *)bpage->datavaddr,
 				      (void *)bpage->vaddr,
 				      bpage->datacount);
 				bpage = STAILQ_NEXT(bpage, links);
 			}
-			break;
+		}
 
-		case BUS_DMASYNC_POSTREAD:
+		if (op & BUS_DMASYNC_POSTREAD) {
 			while (bpage != NULL) {
 				bcopy((void *)bpage->vaddr,
 				      (void *)bpage->datavaddr,
 				      bpage->datacount);
 				bpage = STAILQ_NEXT(bpage, links);
 			}
-			break;
-		case BUS_DMASYNC_PREREAD:
-		case BUS_DMASYNC_POSTWRITE:
-			/* No-ops */
-			break;
 		}
 	}
 }
diff --git a/sys/i386/include/bus_dma.h b/sys/i386/include/bus_dma.h
index 4a1740d..f9471c0 100644
--- a/sys/i386/include/bus_dma.h
+++ b/sys/i386/include/bus_dma.h
@@ -89,16 +89,12 @@ struct mbuf;
 struct uio;
 
 /*
- *	bus_dmasync_op_t
- *
- *	Operations performed by bus_dmamap_sync().
+ * Operations performed by bus_dmamap_sync().
  */
-typedef enum {
-	BUS_DMASYNC_PREREAD,
-	BUS_DMASYNC_POSTREAD,
-	BUS_DMASYNC_PREWRITE,
-	BUS_DMASYNC_POSTWRITE
-} bus_dmasync_op_t;
+#define	BUS_DMASYNC_PREREAD	1
+#define	BUS_DMASYNC_POSTREAD	2
+#define	BUS_DMASYNC_PREWRITE	4
+#define	BUS_DMASYNC_POSTWRITE	8
 
 /*
  *	bus_dma_tag_t
@@ -234,7 +230,7 @@ int bus_dmamap_load_uio(bus_dma_tag_t dmat, bus_dmamap_t map,
 /*
  * Perform a syncronization operation on the given map.
  */
-void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_dmasync_op_t);
+void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, int);
 #define bus_dmamap_sync(dmat, dmamap, op) 		\
 	if ((dmamap) != NULL)				\
 		_bus_dmamap_sync(dmat, dmamap, op)
diff --git a/sys/ia64/ia64/busdma_machdep.c b/sys/ia64/ia64/busdma_machdep.c
index d9c24dd..93ec7ba 100644
--- a/sys/ia64/ia64/busdma_machdep.c
+++ b/sys/ia64/ia64/busdma_machdep.c
@@ -765,7 +765,7 @@ _bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map)
 }
 
 void
-_bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op)
+_bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, int op)
 {
 	struct bounce_page *bpage;
 
@@ -776,28 +776,22 @@ _bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op)
 		 * want to add support for invalidating
 		 * the caches on broken hardware
 		 */
-		switch (op) {
-		case BUS_DMASYNC_PREWRITE:
+		if (op & BUS_DMASYNC_PREWRITE) {
 			while (bpage != NULL) {
 				bcopy((void *)bpage->datavaddr,
 				      (void *)bpage->vaddr,
 				      bpage->datacount);
 				bpage = STAILQ_NEXT(bpage, links);
 			}
-			break;
+		}
 
-		case BUS_DMASYNC_POSTREAD:
+		if (op & BUS_DMASYNC_POSTREAD) {
 			while (bpage != NULL) {
 				bcopy((void *)bpage->vaddr,
 				      (void *)bpage->datavaddr,
 				      bpage->datacount);
 				bpage = STAILQ_NEXT(bpage, links);
 			}
-			break;
-		case BUS_DMASYNC_PREREAD:
-		case BUS_DMASYNC_POSTWRITE:
-			/* No-ops */
-			break;
 		}
 	}
 }
diff --git a/sys/powerpc/powerpc/busdma_machdep.c b/sys/powerpc/powerpc/busdma_machdep.c
index 9e4727f..a0c5202 100644
--- a/sys/powerpc/powerpc/busdma_machdep.c
+++ b/sys/powerpc/powerpc/busdma_machdep.c
@@ -521,7 +521,7 @@ bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map)
 }
 
 void
-bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op)
+bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, int op)
 {
 
 	return;
diff --git a/sys/sparc64/include/bus.h b/sys/sparc64/include/bus.h
index 4a8a5c2..bc6e518 100644
--- a/sys/sparc64/include/bus.h
+++ b/sys/sparc64/include/bus.h
@@ -905,12 +905,10 @@ memsetw(void *d, int val, size_t size)
 struct mbuf;
 struct uio;
 
-typedef enum {
-	BUS_DMASYNC_PREREAD,
-	BUS_DMASYNC_POSTREAD,
-	BUS_DMASYNC_PREWRITE,
-	BUS_DMASYNC_POSTWRITE,
-} bus_dmasync_op_t;
+#define	BUS_DMASYNC_PREREAD	1
+#define	BUS_DMASYNC_POSTREAD	2
+#define	BUS_DMASYNC_PREWRITE	4
+#define	BUS_DMASYNC_POSTWRITE	8
 
 /*
  * A function that returns 1 if the address cannot be accessed by
@@ -977,7 +975,7 @@ struct bus_dma_tag {
 	    bus_dmamap_t, struct uio *, bus_dmamap_callback2_t *, void *, int);
 	void	(*dt_dmamap_unload)(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t);
 	void	(*dt_dmamap_sync)(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t,
-	    bus_dmasync_op_t);
+	    int);
 
 	/*
 	 * DMA memory utility functions.
@@ -1086,8 +1084,7 @@ sparc64_dmamap_unload(bus_dma_tag_t pt, bus_dma_tag_t dt, bus_dmamap_t p)
 	sparc64_dmamap_unload((t), (t), (p))
 
 static __inline void
-sparc64_dmamap_sync(bus_dma_tag_t pt, bus_dma_tag_t dt, bus_dmamap_t m,
-    bus_dmasync_op_t op)
+sparc64_dmamap_sync(bus_dma_tag_t pt, bus_dma_tag_t dt, bus_dmamap_t m, int op)
 {
 	bus_dma_tag_t lt;
 
diff --git a/sys/sparc64/pci/psycho.c b/sys/sparc64/pci/psycho.c
index 75767ee..77deb68 100644
--- a/sys/sparc64/pci/psycho.c
+++ b/sys/sparc64/pci/psycho.c
@@ -111,8 +111,7 @@ static int psycho_dmamap_load_mbuf(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t,
 static int psycho_dmamap_load_uio(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t,
     struct uio *, bus_dmamap_callback2_t *, void *, int);
 static void psycho_dmamap_unload(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t);
-static void psycho_dmamap_sync(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t,
-    bus_dmasync_op_t);
+static void psycho_dmamap_sync(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t, int);
 static int psycho_dmamem_alloc_size(bus_dma_tag_t, bus_dma_tag_t, void **, int,
     bus_dmamap_t *, bus_size_t size);
 static int psycho_dmamem_alloc(bus_dma_tag_t, bus_dma_tag_t, void **, int,
@@ -1430,7 +1429,7 @@ psycho_dmamap_unload(bus_dma_tag_t pdmat, bus_dma_tag_t ddmat, bus_dmamap_t map)
 
 static void
 psycho_dmamap_sync(bus_dma_tag_t pdmat, bus_dma_tag_t ddmat, bus_dmamap_t map,
-    bus_dmasync_op_t op)
+    int op)
 {
 	struct psycho_softc *sc;
 
diff --git a/sys/sparc64/sbus/sbus.c b/sys/sparc64/sbus/sbus.c
index 4664829..bf39851 100644
--- a/sys/sparc64/sbus/sbus.c
+++ b/sys/sparc64/sbus/sbus.c
@@ -242,8 +242,7 @@ static int sbus_dmamap_load_mbuf(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t,
 static int sbus_dmamap_load_uio(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t,
     struct uio *, bus_dmamap_callback2_t *, void *, int);
 static void sbus_dmamap_unload(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t);
-static void sbus_dmamap_sync(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t,
-    bus_dmasync_op_t);
+static void sbus_dmamap_sync(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t, int);
 static int sbus_dmamem_alloc_size(bus_dma_tag_t, bus_dma_tag_t, void **, int,
     bus_dmamap_t *, bus_size_t size);
 static int sbus_dmamem_alloc(bus_dma_tag_t, bus_dma_tag_t, void **, int,
@@ -986,7 +985,7 @@ sbus_dmamap_unload(bus_dma_tag_t pdmat, bus_dma_tag_t ddmat, bus_dmamap_t map)
 
 static void
 sbus_dmamap_sync(bus_dma_tag_t pdmat, bus_dma_tag_t ddmat, bus_dmamap_t map,
-    bus_dmasync_op_t op)
+    int)
 {
 	struct sbus_softc *sc = (struct sbus_softc *)pdmat->dt_cookie;
 
diff --git a/sys/sparc64/sparc64/bus_machdep.c b/sys/sparc64/sparc64/bus_machdep.c
index 2b3ddc87..c3545b0 100644
--- a/sys/sparc64/sparc64/bus_machdep.c
+++ b/sys/sparc64/sparc64/bus_machdep.c
@@ -169,8 +169,7 @@ static int nexus_dmamap_load_mbuf(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t,
 static int nexus_dmamap_load_uio(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t,
     struct uio *, bus_dmamap_callback2_t *, void *, int);
 static void nexus_dmamap_unload(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t);
-static void nexus_dmamap_sync(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t,
-    bus_dmasync_op_t);
+static void nexus_dmamap_sync(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t, int);
 static int nexus_dmamem_alloc_size(bus_dma_tag_t, bus_dma_tag_t, void **, int,
     bus_dmamap_t *, u_long size);
 static int nexus_dmamem_alloc(bus_dma_tag_t, bus_dma_tag_t, void **, int,
@@ -555,7 +554,7 @@ nexus_dmamap_unload(bus_dma_tag_t pdmat, bus_dma_tag_t ddmat, bus_dmamap_t map)
  */
 static void
 nexus_dmamap_sync(bus_dma_tag_t pdmat, bus_dma_tag_t ddmat, bus_dmamap_t map,
-    bus_dmasync_op_t op)
+    int op)
 {
 
 	/*
@@ -563,7 +562,7 @@ nexus_dmamap_sync(bus_dma_tag_t pdmat, bus_dma_tag_t ddmat, bus_dmamap_t map,
 	 *
 	 * Actually a #Sync is expensive.  We should optimize.
 	 */
-	if ((op == BUS_DMASYNC_PREREAD) || (op == BUS_DMASYNC_PREWRITE)) {
+	if ((op & BUS_DMASYNC_PREREAD) || (op & BUS_DMASYNC_PREWRITE)) {
 		/* 
 		 * Don't really need to do anything, but flush any pending
 		 * writes anyway. 
@@ -572,12 +571,12 @@ nexus_dmamap_sync(bus_dma_tag_t pdmat, bus_dma_tag_t ddmat, bus_dmamap_t map,
 	}
 #if 0
 	/* Should not be needed. */
-	if (op == BUS_DMASYNC_POSTREAD) {
+	if (op & BUS_DMASYNC_POSTREAD) {
 		ecache_flush((vm_offset_t)map->buf,
 		    (vm_offset_t)map->buf + map->buflen - 1);
 	}
 #endif
-	if (op == BUS_DMASYNC_POSTWRITE) {
+	if (op & BUS_DMASYNC_POSTWRITE) {
 		/* Nothing to do.  Handled by the bus controller. */
 	}
 }
diff --git a/sys/sparc64/sparc64/iommu.c b/sys/sparc64/sparc64/iommu.c
index 9dc8d96..015b19d 100644
--- a/sys/sparc64/sparc64/iommu.c
+++ b/sys/sparc64/sparc64/iommu.c
@@ -1011,18 +1011,16 @@ iommu_dvmamap_unload(bus_dma_tag_t pt, bus_dma_tag_t dt, struct iommu_state *is,
 
 void
 iommu_dvmamap_sync(bus_dma_tag_t pt, bus_dma_tag_t dt, struct iommu_state *is,
-    bus_dmamap_t map, bus_dmasync_op_t op)
+    bus_dmamap_t map, int op)
 {
 	struct bus_dmamap_res *r;
 	vm_offset_t va;
 	vm_size_t len;
 
-	switch (op) {
-	case BUS_DMASYNC_PREREAD:
+	/* XXX This is probably bogus. */
+	if (op & BUS_DMASYNC_PREREAD)
 		membar(Sync);
-		break;
-	case BUS_DMASYNC_POSTREAD:
-	case BUS_DMASYNC_PREWRITE:
+	if ((op & BUS_DMASYNC_POSTREAD) || (op & BUS_DMASYNC_PREWRITE)) {
 		SLIST_FOREACH(r, &map->dm_reslist, dr_link) {
 			va = (vm_offset_t)BDR_START(r);
 			len = r->dr_used;
@@ -1034,14 +1032,8 @@ iommu_dvmamap_sync(bus_dma_tag_t pt, bus_dma_tag_t dt, struct iommu_state *is,
 				va += IO_PAGE_SIZE;
 			}
 		}
-		if (op == BUS_DMASYNC_PREWRITE)
+		if (op & BUS_DMASYNC_PREWRITE)
 			membar(Sync);
-		break;
-	case BUS_DMASYNC_POSTWRITE:
-		/* Nothing to do. */
-		break;
-	default:
-		panic("iommu_dvmamap_sync: bogus op %d", op);
 	}
 }
 
diff --git a/sys/sys/bus_dma.h b/sys/sys/bus_dma.h
index 4a1740d..f9471c0 100644
--- a/sys/sys/bus_dma.h
+++ b/sys/sys/bus_dma.h
@@ -89,16 +89,12 @@ struct mbuf;
 struct uio;
 
 /*
- *	bus_dmasync_op_t
- *
- *	Operations performed by bus_dmamap_sync().
+ * Operations performed by bus_dmamap_sync().
  */
-typedef enum {
-	BUS_DMASYNC_PREREAD,
-	BUS_DMASYNC_POSTREAD,
-	BUS_DMASYNC_PREWRITE,
-	BUS_DMASYNC_POSTWRITE
-} bus_dmasync_op_t;
+#define	BUS_DMASYNC_PREREAD	1
+#define	BUS_DMASYNC_POSTREAD	2
+#define	BUS_DMASYNC_PREWRITE	4
+#define	BUS_DMASYNC_POSTWRITE	8
 
 /*
  *	bus_dma_tag_t
@@ -234,7 +230,7 @@ int bus_dmamap_load_uio(bus_dma_tag_t dmat, bus_dmamap_t map,
 /*
  * Perform a syncronization operation on the given map.
  */
-void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_dmasync_op_t);
+void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, int);
 #define bus_dmamap_sync(dmat, dmamap, op) 		\
 	if ((dmamap) != NULL)				\
 		_bus_dmamap_sync(dmat, dmamap, op)