Clean up argument comments for bus_dma_tag_create() calls.

16 files changed, 451 insertions, 308 deletions

diff --git a/sys/dev/advansys/adv_eisa.c b/sys/dev/advansys/adv_eisa.c
index 609a4eb..4884317 100644
--- a/sys/dev/advansys/adv_eisa.c
+++ b/sys/dev/advansys/adv_eisa.c
@@ -171,16 +171,19 @@ adv_eisa_attach(device_t dev)
 		 * by the MI portions of the advansys driver
 		 */
 		/* XXX Should be a child of the PCI bus dma tag */
-		error = bus_dma_tag_create(/*parent*/NULL, /*alignment*/1,
-					   /*boundary*/0,
-					   /*lowaddr*/ADV_EISA_MAX_DMA_ADDR,
-					   /*highaddr*/BUS_SPACE_MAXADDR,
-					   /*filter*/NULL, /*filterarg*/NULL,
-					   /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
-					   /*nsegments*/~0,
-					   /*maxsegsz*/ADV_EISA_MAX_DMA_COUNT,
-					   /*flags*/0,
-					   &adv_b->parent_dmat);
+		error = bus_dma_tag_create(
+				/* parent	*/ NULL,
+				/* alignment	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ ADV_EISA_MAX_DMA_ADDR,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* nsegments	*/ ~0,
+				/* maxsegsz	*/ ADV_EISA_MAX_DMA_COUNT,
+				/* flags	*/ 0,
+				&adv_b->parent_dmat);
  
 		if (error != 0) {
 			printf("%s: Could not allocate DMA tag - error %d\n",
@@ -206,16 +209,19 @@ adv_eisa_attach(device_t dev)
 		 * by the MI portions of the advansys driver
 		 */
 		/* XXX Should be a child of the PCI bus dma tag */
-		error = bus_dma_tag_create(/*parent*/NULL, /*alignment*/1,
-					   /*boundary*/0,
-					   /*lowaddr*/ADV_EISA_MAX_DMA_ADDR,
-					   /*highaddr*/BUS_SPACE_MAXADDR,
-					   /*filter*/NULL, /*filterarg*/NULL,
-					   /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
-					   /*nsegments*/~0,
-					   /*maxsegsz*/ADV_EISA_MAX_DMA_COUNT,
-					   /*flags*/0,
-					   &adv->parent_dmat);
+		error = bus_dma_tag_create(
+				/* parent	*/ NULL,
+				/* alignment	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ ADV_EISA_MAX_DMA_ADDR,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* nsegments	*/ ~0,
+				/* maxsegsz	*/ ADV_EISA_MAX_DMA_COUNT,
+				/* flags	*/ 0,
+				&adv->parent_dmat);
  
 		if (error != 0) {
 			printf("%s: Could not allocate DMA tag - error %d\n",
@@ -234,18 +240,19 @@ adv_eisa_attach(device_t dev)
 
 	if (overrun_buf == NULL) {
 		/* Need to allocate our overrun buffer */
-		if (bus_dma_tag_create(adv->parent_dmat,
-				       /*alignment*/8,
-				       /*boundary*/0,
-				       ADV_EISA_MAX_DMA_ADDR,
-				       BUS_SPACE_MAXADDR,
-				       /*filter*/NULL,
-				       /*filterarg*/NULL,
-				       ADV_OVERRUN_BSIZE,
-				       /*nsegments*/1,
-				       BUS_SPACE_MAXSIZE_32BIT,
-				       /*flags*/0,
-				       &overrun_dmat) != 0) {
+		if (bus_dma_tag_create(
+				/* parent	*/ adv->parent_dmat,
+				/* alignment	*/ 8,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ ADV_EISA_MAX_DMA_ADDR,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ ADV_OVERRUN_BSIZE,
+				/* nsegments	*/ 1,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* flags	*/ 0,
+				&overrun_dmat) != 0) {
 			adv_free(adv);
 			goto bad;
        		}
diff --git a/sys/dev/advansys/adv_isa.c b/sys/dev/advansys/adv_isa.c
index b8c5e3f..e8eca4e 100644
--- a/sys/dev/advansys/adv_isa.c
+++ b/sys/dev/advansys/adv_isa.c
@@ -218,18 +218,19 @@ adv_isa_probe(device_t dev)
 		 * by the MI portions of the advansys driver
 		 */
 		/* XXX Should be a child of the ISA bus dma tag */ 
-		error = bus_dma_tag_create(/*parent*/NULL,
-					   /*alignemnt*/1,
-					   /*boundary*/0,
-					   lowaddr,
-					   /*highaddr*/BUS_SPACE_MAXADDR,
-					   /*filter*/NULL,
-					   /*filterarg*/NULL,
-					   maxsize,
-					   /*nsegs*/~0,
-					   maxsegsz,
-					   /*flags*/0,
-					   &adv->parent_dmat); 
+		error = bus_dma_tag_create(
+				/* parent	*/ NULL,
+				/* alignemnt	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ lowaddr,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ maxsize,
+				/* nsegments	*/ ~0,
+				/* maxsegsz	*/ maxsegsz,
+				/* flags	*/ 0,
+				&adv->parent_dmat); 
 
 		if (error != 0) {
 			printf("%s: Could not allocate DMA tag - error %d\n",
@@ -243,18 +244,19 @@ adv_isa_probe(device_t dev)
 
 		if (overrun_buf == NULL) {
 			/* Need to allocate our overrun buffer */
-			if (bus_dma_tag_create(adv->parent_dmat,
-					       /*alignment*/8,
-					       /*boundary*/0,
-					       ADV_ISA_MAX_DMA_ADDR,
-					       BUS_SPACE_MAXADDR,
-					       /*filter*/NULL,
-					       /*filterarg*/NULL,
-					       ADV_OVERRUN_BSIZE,
-					       /*nsegments*/1,
-					       BUS_SPACE_MAXSIZE_32BIT,
-					       /*flags*/0,
-					       &overrun_dmat) != 0) {
+			if (bus_dma_tag_create(
+				/* parent	*/ adv->parent_dmat,
+				/* alignment	*/ 8,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ ADV_ISA_MAX_DMA_ADDR,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ ADV_OVERRUN_BSIZE,
+				/* nsegments	*/ 1,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* flags	*/ 0,
+				&overrun_dmat) != 0) {
 				adv_free(adv);
 				bus_release_resource(dev, SYS_RES_IOPORT, 0,
 						     iores);
diff --git a/sys/dev/advansys/adv_pci.c b/sys/dev/advansys/adv_pci.c
index b8234cc..0891f48 100644
--- a/sys/dev/advansys/adv_pci.c
+++ b/sys/dev/advansys/adv_pci.c
@@ -185,16 +185,19 @@ adv_pci_attach(device_t dev)
 
 	/* Allocate a dmatag for our transfer DMA maps */
 	/* XXX Should be a child of the PCI bus dma tag */
-	error = bus_dma_tag_create(/*parent*/NULL, /*alignment*/1,
-				   /*boundary*/0,
-				   /*lowaddr*/ADV_PCI_MAX_DMA_ADDR,
-				   /*highaddr*/BUS_SPACE_MAXADDR,
-				   /*filter*/NULL, /*filterarg*/NULL,
-				   /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
-				   /*nsegments*/~0,
-				   /*maxsegsz*/ADV_PCI_MAX_DMA_COUNT,
-				   /*flags*/0,
-				   &adv->parent_dmat);
+	error = bus_dma_tag_create(
+			/* parent	*/ NULL,
+			/* alignment	*/ 1,
+			/* boundary	*/ 0,
+			/* lowaddr	*/ ADV_PCI_MAX_DMA_ADDR,
+			/* highaddr	*/ BUS_SPACE_MAXADDR,
+			/* filter	*/ NULL,
+			/* filterarg	*/ NULL,
+			/* maxsize	*/ BUS_SPACE_MAXSIZE_32BIT,
+			/* nsegments	*/ ~0,
+			/* maxsegsz	*/ ADV_PCI_MAX_DMA_COUNT,
+			/* flags	*/ 0,
+			&adv->parent_dmat);
  
 	if (error != 0) {
 		printf("%s: Could not allocate DMA tag - error %d\n",
@@ -208,13 +211,19 @@ adv_pci_attach(device_t dev)
 
 	if (overrun_buf == NULL) {
 		/* Need to allocate our overrun buffer */
-		if (bus_dma_tag_create(adv->parent_dmat,
-				       /*alignment*/8, /*boundary*/0,
-				       ADV_PCI_MAX_DMA_ADDR, BUS_SPACE_MAXADDR,
-				       /*filter*/NULL, /*filterarg*/NULL,
-				       ADV_OVERRUN_BSIZE, /*nsegments*/1,
-				       BUS_SPACE_MAXSIZE_32BIT, /*flags*/0,
-				       &overrun_dmat) != 0) {
+		if (bus_dma_tag_create(
+				/* parent	*/ adv->parent_dmat,
+				/* alignment	*/ 8,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ ADV_PCI_MAX_DMA_ADDR,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ ADV_OVERRUN_BSIZE,
+				/* nsegments	*/ 1,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* flags	*/ 0,
+				&overrun_dmat) != 0) {
 			bus_dma_tag_destroy(adv->parent_dmat);
 			adv_free(adv);
 			bus_release_resource(dev, SYS_RES_IOPORT, rid, iores);
diff --git a/sys/dev/advansys/advansys.c b/sys/dev/advansys/advansys.c
index fcd7d3f..ed820aa 100644
--- a/sys/dev/advansys/advansys.c
+++ b/sys/dev/advansys/advansys.c
@@ -1335,28 +1335,38 @@ adv_attach(adv)
 		max_sg = 255;
 
 	/* DMA tag for mapping buffers into device visible space. */
-	if (bus_dma_tag_create(adv->parent_dmat, /*alignment*/1, /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       /*maxsize*/MAXPHYS,
-			       /*nsegments*/max_sg,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*flags*/BUS_DMA_ALLOCNOW,
-			       &adv->buffer_dmat) != 0) {
+	if (bus_dma_tag_create(
+			/* parent	*/ adv->parent_dmat,
+			/* alignment	*/ 1,
+			/* boundary	*/ 0,
+			/* lowaddr	*/ BUS_SPACE_MAXADDR,
+			/* highaddr	*/ BUS_SPACE_MAXADDR,
+			/* filter	*/ NULL,
+			/* filterarg	*/ NULL,
+			/* maxsize	*/ MAXPHYS,
+			/* nsegments	*/ max_sg,
+			/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+			/* flags	*/ BUS_DMA_ALLOCNOW,
+			&adv->buffer_dmat) != 0) {
 		return (ENXIO);
 	}
 	adv->init_level++;
 
 	/* DMA tag for our sense buffers */
-	if (bus_dma_tag_create(adv->parent_dmat, /*alignment*/1, /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       sizeof(struct scsi_sense_data)*adv->max_openings,
-			       /*nsegments*/1,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*flags*/0, &adv->sense_dmat) != 0) {
+	if (bus_dma_tag_create(
+			/* parent	*/ adv->parent_dmat,
+			/* alignment	*/ 1,
+			/* boundary	*/ 0,
+			/* lowaddr	*/ BUS_SPACE_MAXADDR,
+			/* highaddr	*/ BUS_SPACE_MAXADDR,
+			/* filter	*/ NULL,
+			/* filterarg	*/ NULL,
+			/* maxsize	*/ sizeof(struct scsi_sense_data) *
+					   adv->max_openings,
+			/* nsegments	*/ 1,
+			/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+			/* flags	*/ 0,
+			&adv->sense_dmat) != 0) {
 		return (ENXIO);
         }
 
diff --git a/sys/dev/advansys/adw_pci.c b/sys/dev/advansys/adw_pci.c
index eed11a0..b843005 100644
--- a/sys/dev/advansys/adw_pci.c
+++ b/sys/dev/advansys/adw_pci.c
@@ -256,16 +256,19 @@ adw_pci_attach(device_t dev)
 
 	/* Allocate a dmatag for our transfer DMA maps */
 	/* XXX Should be a child of the PCI bus dma tag */
-	error = bus_dma_tag_create(/*parent*/NULL, /*alignment*/1,
-				   /*boundary*/0,
-				   /*lowaddr*/ADW_PCI_MAX_DMA_ADDR,
-				   /*highaddr*/BUS_SPACE_MAXADDR,
-				   /*filter*/NULL, /*filterarg*/NULL,
-				   /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
-				   /*nsegments*/~0,
-				   /*maxsegsz*/ADW_PCI_MAX_DMA_COUNT,
-				   /*flags*/0,
-				   &adw->parent_dmat);
+	error = bus_dma_tag_create(
+			/* parent	*/ NULL,
+			/* alignment	*/ 1,
+			/* boundary	*/ 0,
+			/* lowaddr	*/ ADW_PCI_MAX_DMA_ADDR,
+			/* highaddr	*/ BUS_SPACE_MAXADDR,
+			/* filter	*/ NULL,
+			/* filterarg	*/ NULL,
+			/* maxsize	*/ BUS_SPACE_MAXSIZE_32BIT,
+			/* nsegments	*/ ~0,
+			/* maxsegsz	*/ ADW_PCI_MAX_DMA_COUNT,
+			/* flags	*/ 0,
+			&adw->parent_dmat);
 
 	adw->init_level++;
  
diff --git a/sys/dev/advansys/adwcam.c b/sys/dev/advansys/adwcam.c
index 5007413..4085f3b 100644
--- a/sys/dev/advansys/adwcam.c
+++ b/sys/dev/advansys/adwcam.c
@@ -1029,30 +1029,40 @@ adw_init(struct adw_softc *adw)
 	printf("%s: SCSI ID %d, ", adw_name(adw), adw->initiator_id);
 
 	/* DMA tag for mapping buffers into device visible space. */
-	if (bus_dma_tag_create(adw->parent_dmat, /*alignment*/1, /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       /*maxsize*/MAXBSIZE, /*nsegments*/ADW_SGSIZE,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*flags*/BUS_DMA_ALLOCNOW,
-			       &adw->buffer_dmat) != 0) {
+	if (bus_dma_tag_create(
+			/* parent	*/ adw->parent_dmat,
+			/* alignment	*/ 1,
+			/* boundary	*/ 0,
+			/* lowaddr	*/ BUS_SPACE_MAXADDR_32BIT,
+			/* highaddr	*/ BUS_SPACE_MAXADDR,
+			/* filter	*/ NULL,
+			/* filterarg	*/ NULL,
+			/* maxsize	*/ MAXBSIZE,
+			/* nsegments	*/ ADW_SGSIZE,
+			/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+			/* flags	*/ BUS_DMA_ALLOCNOW,
+			&adw->buffer_dmat) != 0) {
 		return (ENOMEM);
 	}
 
 	adw->init_level++;
 
 	/* DMA tag for our ccb carrier structures */
-	if (bus_dma_tag_create(adw->parent_dmat, /*alignment*/0x10,
-			       /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       (adw->max_acbs + ADW_NUM_CARRIER_QUEUES + 1)
-				* sizeof(struct adw_carrier),
-			       /*nsegments*/1,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*flags*/0, &adw->carrier_dmat) != 0) {
+	if (bus_dma_tag_create(
+			/* parent	*/ adw->parent_dmat,
+			/* alignment	*/ 0x10,
+			/* boundary	*/ 0,
+			/* lowaddr	*/ BUS_SPACE_MAXADDR_32BIT,
+			/* highaddr	*/ BUS_SPACE_MAXADDR,
+			/* filter	*/ NULL,
+			/* filterarg	*/ NULL,
+			/* maxsize	*/ (adw->max_acbs +
+					    ADW_NUM_CARRIER_QUEUES + 1) *
+					    sizeof(struct adw_carrier),
+			/* nsegments	*/ 1,
+			/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+			/* flags	*/ 0,
+			&adw->carrier_dmat) != 0) {
 		return (ENOMEM);
         }
 
@@ -1099,14 +1109,19 @@ adw_init(struct adw_softc *adw)
 	adw->init_level++;
 
 	/* DMA tag for our acb structures */
-	if (bus_dma_tag_create(adw->parent_dmat, /*alignment*/1, /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       adw->max_acbs * sizeof(struct acb),
-			       /*nsegments*/1,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*flags*/0, &adw->acb_dmat) != 0) {
+	if (bus_dma_tag_create(
+			/* parent	*/ adw->parent_dmat,
+			/* alignment	*/ 1,
+			/* boundary	*/ 0,
+			/* lowaddr	*/ BUS_SPACE_MAXADDR,
+			/* highaddr	*/ BUS_SPACE_MAXADDR,
+			/* filter	*/ NULL,
+			/* filterarg	*/ NULL,
+			/* maxsize	*/ adw->max_acbs * sizeof(struct acb),
+			/* nsegments	*/ 1,
+			/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+			/* flags	*/ 0,
+			&adw->acb_dmat) != 0) {
 		return (ENOMEM);
         }
 
@@ -1129,13 +1144,19 @@ adw_init(struct adw_softc *adw)
 	bzero(adw->acbs, adw->max_acbs * sizeof(struct acb)); 
 
 	/* DMA tag for our S/G structures.  We allocate in page sized chunks */
-	if (bus_dma_tag_create(adw->parent_dmat, /*alignment*/1, /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       PAGE_SIZE, /*nsegments*/1,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*flags*/0, &adw->sg_dmat) != 0) {
+	if (bus_dma_tag_create(
+			/* parent	*/ adw->parent_dmat,
+			/* alignment	*/ 1,
+			/* boundary	*/ 0,
+			/* lowaddr	*/ BUS_SPACE_MAXADDR,
+			/* highaddr	*/ BUS_SPACE_MAXADDR,
+			/* filter	*/ NULL,
+			/* filterarg	*/ NULL,
+			/* maxsize	*/ PAGE_SIZE,
+			/* nsegments	*/ 1,
+			/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+			/* flags	*/ 0,
+			&adw->sg_dmat) != 0) {
 		return (ENOMEM);
         }
 
diff --git a/sys/dev/aha/aha.c b/sys/dev/aha/aha.c
index 4ba7cea..7fe6f25 100644
--- a/sys/dev/aha/aha.c
+++ b/sys/dev/aha/aha.c
@@ -481,28 +481,37 @@ aha_init(struct aha_softc* aha)
 	 */
 
 	/* DMA tag for mapping buffers into device visible space. */
-	if (bus_dma_tag_create(aha->parent_dmat, /*alignment*/1, /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       /*maxsize*/MAXBSIZE, /*nsegments*/AHA_NSEG,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_24BIT,
-			       /*flags*/BUS_DMA_ALLOCNOW,
-			       &aha->buffer_dmat) != 0) {
+	if (bus_dma_tag_create(	/* parent	*/ aha->parent_dmat,
+				/* alignment	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ BUS_SPACE_MAXADDR,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ MAXBSIZE,
+				/* nsegments	*/ AHA_NSEG,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_24BIT,
+				/* flags	*/ BUS_DMA_ALLOCNOW,
+				&aha->buffer_dmat) != 0) {
 		goto error_exit;
 	}
 
 	aha->init_level++;
 	/* DMA tag for our mailboxes */
-	if (bus_dma_tag_create(aha->parent_dmat, /*alignment*/1, /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       aha->num_boxes * (sizeof(aha_mbox_in_t)
-					       + sizeof(aha_mbox_out_t)),
-			       /*nsegments*/1,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_24BIT,
-			       /*flags*/0, &aha->mailbox_dmat) != 0) {
+	if (bus_dma_tag_create(	/* parent	*/ aha->parent_dmat,
+				/* alignment	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ BUS_SPACE_MAXADDR,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ aha->num_boxes *
+						   (sizeof(aha_mbox_in_t) +
+						    sizeof(aha_mbox_out_t)),
+				/* nsegments	*/ 1,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_24BIT,
+				/* flags	*/ 0,
+				&aha->mailbox_dmat) != 0) {
 		goto error_exit;
         }
 
@@ -530,14 +539,19 @@ aha_init(struct aha_softc* aha)
 	ahainitmboxes(aha);
 
 	/* DMA tag for our ccb structures */
-	if (bus_dma_tag_create(aha->parent_dmat, /*alignment*/1, /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       aha->max_ccbs * sizeof(struct aha_ccb),
-			       /*nsegments*/1,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_24BIT,
-			       /*flags*/0, &aha->ccb_dmat) != 0) {
+	if (bus_dma_tag_create(	/* parent	*/ aha->parent_dmat,
+				/* alignment	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ BUS_SPACE_MAXADDR,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ aha->max_ccbs *
+						   sizeof(struct aha_ccb),
+				/* nsegments	*/ 1,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_24BIT,
+				/* flags	*/ 0,
+				&aha->ccb_dmat) != 0) {
 		goto error_exit;
         }
 
@@ -560,13 +574,18 @@ aha_init(struct aha_softc* aha)
 	aha->init_level++;
 
 	/* DMA tag for our S/G structures.  We allocate in page sized chunks */
-	if (bus_dma_tag_create(aha->parent_dmat, /*alignment*/1, /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       PAGE_SIZE, /*nsegments*/1,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_24BIT,
-			       /*flags*/0, &aha->sg_dmat) != 0) {
+	if (bus_dma_tag_create(	/* parent	*/ aha->parent_dmat,
+				/* alignment	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ BUS_SPACE_MAXADDR,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ PAGE_SIZE,
+				/* nsegments	*/ 1,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_24BIT,
+				/* flags	*/ 0,
+				&aha->sg_dmat) != 0) {
 		goto error_exit;
         }
 
diff --git a/sys/dev/aha/aha_isa.c b/sys/dev/aha/aha_isa.c
index 4703246..095bd1b 100644
--- a/sys/dev/aha/aha_isa.c
+++ b/sys/dev/aha/aha_isa.c
@@ -244,13 +244,18 @@ aha_isa_attach(device_t dev)
 	filter_arg = NULL;
 	lowaddr = BUS_SPACE_MAXADDR_24BIT;
 
-	if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/1, /*boundary*/0,
-	    lowaddr, /*highaddr*/BUS_SPACE_MAXADDR,
-	    filter, filter_arg,
-	    /*maxsize*/BUS_SPACE_MAXSIZE_24BIT,
-	    /*nsegments*/~0,
-	    /*maxsegsz*/BUS_SPACE_MAXSIZE_24BIT,
-	    /*flags*/0, &aha->parent_dmat) != 0) {
+	if (bus_dma_tag_create(	/* parent	*/ NULL,
+				/* alignemnt	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ lowaddr,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ filter,
+				/* filterarg	*/ filter_arg,
+				/* maxsize	*/ BUS_SPACE_MAXSIZE_24BIT,
+				/* nsegments	*/ ~0,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_24BIT,
+				/* flags	*/ 0,
+				&aha->parent_dmat) != 0) {
                 aha_free(aha);
 		bus_release_resource(dev, SYS_RES_IOPORT, aha->portrid, aha->port);
 		bus_release_resource(dev, SYS_RES_IRQ, aha->irqrid, aha->irq);
diff --git a/sys/dev/aha/aha_mca.c b/sys/dev/aha/aha_mca.c
index ed1aea0..761504e 100644
--- a/sys/dev/aha/aha_mca.c
+++ b/sys/dev/aha/aha_mca.c
@@ -172,18 +172,19 @@ aha_mca_attach (device_t dev)
 
 	isa_dmacascade(rman_get_start(drq));
 
-	error = bus_dma_tag_create(/* parent	*/	NULL,
-				   /* alignemnt	*/	1,
-				   /* boundary	*/	0,
-				   			BUS_SPACE_MAXADDR_24BIT,
-				   /* highaddr	*/	BUS_SPACE_MAXADDR,
-				   			NULL,
-							NULL,
-				   /* maxsize	*/	BUS_SPACE_MAXSIZE_24BIT,
-				   /* nsegments	*/	~0,
-				   /* maxsegsz	*/	BUS_SPACE_MAXSIZE_24BIT,
-				   /* flags	*/	0,
-							&sc->parent_dmat);
+	error = bus_dma_tag_create(
+				/* parent	*/ NULL,
+				/* alignemnt	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ BUS_SPACE_MAXADDR_24BIT,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ BUS_SPACE_MAXSIZE_24BIT,
+				/* nsegments	*/ ~0,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_24BIT,
+				/* flags	*/ 0,
+				&sc->parent_dmat);
 	if (error) {
 		device_printf(dev, "bus_dma_tag_create() failed!\n");
 		goto bad;
diff --git a/sys/dev/ahb/ahb.c b/sys/dev/ahb/ahb.c
index ec5d138..e6d715b 100644
--- a/sys/dev/ahb/ahb.c
+++ b/sys/dev/ahb/ahb.c
@@ -292,28 +292,37 @@ ahbattach(device_t dev)
 	 */
 	/* DMA tag for mapping buffers into device visible space. */
 	/* XXX Should be a child of the EISA bus dma tag */
-	if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/1, /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       /*maxsize*/MAXBSIZE, /*nsegments*/AHB_NSEG,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*flags*/BUS_DMA_ALLOCNOW,
-			       &ahb->buffer_dmat) != 0)
+	if (bus_dma_tag_create(	/* parent	*/ NULL,
+				/* alignment	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ BUS_SPACE_MAXADDR_32BIT,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ MAXBSIZE,
+				/* nsegments	*/ AHB_NSEG,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* flags	*/ BUS_DMA_ALLOCNOW,
+				&ahb->buffer_dmat) != 0)
 		goto error_exit;
 
 	ahb->init_level++;
 
 	/* DMA tag for our ccb structures and ha inquiry data */
-	if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/1, /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       (AHB_NECB * sizeof(struct ecb))
-			       + sizeof(*ahb->ha_inq_data),
-			       /*nsegments*/1,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*flags*/0, &ahb->ecb_dmat) != 0)
+	if (bus_dma_tag_create(	/* parent	*/ NULL,
+				/* alignment	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ BUS_SPACE_MAXADDR_32BIT,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ (AHB_NECB *
+						    sizeof(struct ecb))
+						    + sizeof(*ahb->ha_inq_data),
+				/* nsegments	*/ 1,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* flags	*/ 0,
+				&ahb->ecb_dmat) != 0)
 		goto error_exit;
 
 	ahb->init_level++;
diff --git a/sys/dev/buslogic/bt.c b/sys/dev/buslogic/bt.c
index b7bc725..cfcf2e6 100644
--- a/sys/dev/buslogic/bt.c
+++ b/sys/dev/buslogic/bt.c
@@ -705,28 +705,37 @@ bt_init(device_t dev)
 	 */
 
 	/* DMA tag for mapping buffers into device visible space. */
-	if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/1, /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       /*maxsize*/MAXBSIZE, /*nsegments*/BT_NSEG,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*flags*/BUS_DMA_ALLOCNOW,
-			       &bt->buffer_dmat) != 0) {
+	if (bus_dma_tag_create( /* parent	*/ bt->parent_dmat,
+				/* alignment	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ BUS_SPACE_MAXADDR,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ MAXBSIZE,
+				/* nsegments	*/ BT_NSEG,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* flags	*/ BUS_DMA_ALLOCNOW,
+				&bt->buffer_dmat) != 0) {
 		goto error_exit;
 	}
 
 	bt->init_level++;
 	/* DMA tag for our mailboxes */
-	if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/1, /*boundary*/0,
-			       /*lowaddr*/bt->mailbox_addrlimit,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       bt->num_boxes * (sizeof(bt_mbox_in_t)
-					      + sizeof(bt_mbox_out_t)),
-			       /*nsegments*/1,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*flags*/0, &bt->mailbox_dmat) != 0) {
+	if (bus_dma_tag_create(	/* parent	*/ bt->parent_dmat,
+				/* alignment	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ bt->mailbox_addrlimit,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ bt->num_boxes *
+						   (sizeof(bt_mbox_in_t) +
+						    sizeof(bt_mbox_out_t)),
+				/* nsegments	*/ 1,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* flags	*/ 0,
+				&bt->mailbox_dmat) != 0) {
 		goto error_exit;
         }
 
@@ -754,14 +763,19 @@ bt_init(device_t dev)
 	btinitmboxes(bt);
 
 	/* DMA tag for our ccb structures */
-	if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/1, /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       bt->max_ccbs * sizeof(struct bt_ccb),
-			       /*nsegments*/1,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*flags*/0, &bt->ccb_dmat) != 0) {
+	if (bus_dma_tag_create(	/* parent	*/ bt->parent_dmat,
+				/* alignment	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ BUS_SPACE_MAXADDR,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ bt->max_ccbs *
+						   sizeof(struct bt_ccb),
+				/* nsegments	*/ 1,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* flags	*/ 0,
+				&bt->ccb_dmat) != 0) {
 		goto error_exit;
         }
 
@@ -784,13 +798,18 @@ bt_init(device_t dev)
 	bt->init_level++;
 
 	/* DMA tag for our S/G structures.  We allocate in page sized chunks */
-	if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/1, /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       PAGE_SIZE, /*nsegments*/1,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*flags*/0, &bt->sg_dmat) != 0) {
+	if (bus_dma_tag_create(	/* parent	*/ bt->parent_dmat,
+				/* alignment	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ BUS_SPACE_MAXADDR,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ PAGE_SIZE,
+				/* nsegments	*/ 1,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* flags	*/ 0,
+				&bt->sg_dmat) != 0) {
 		goto error_exit;
         }
 
diff --git a/sys/dev/buslogic/bt_eisa.c b/sys/dev/buslogic/bt_eisa.c
index a034a5b..a020d01 100644
--- a/sys/dev/buslogic/bt_eisa.c
+++ b/sys/dev/buslogic/bt_eisa.c
@@ -309,14 +309,18 @@ bt_eisa_attach(device_t dev)
 
 	/* Allocate a dmatag for our SCB DMA maps */
 	/* XXX Should be a child of the PCI bus dma tag */
-	if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/1, /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*nsegments*/~0,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*flags*/0, &bt->parent_dmat) != 0) {
+	if (bus_dma_tag_create( /* parent	*/ NULL,
+				/* alignment	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ BUS_SPACE_MAXADDR_32BIT,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* nsegments	*/ ~0,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* flags	*/ 0,
+				&bt->parent_dmat) != 0) {
 		bt_eisa_release_resources(dev);
 		return -1;
 	}
diff --git a/sys/dev/buslogic/bt_isa.c b/sys/dev/buslogic/bt_isa.c
index f977beb..f76aa16 100644
--- a/sys/dev/buslogic/bt_isa.c
+++ b/sys/dev/buslogic/bt_isa.c
@@ -232,13 +232,18 @@ bt_isa_attach(device_t dev)
 	}
 			
 	/* XXX Should be a child of the ISA or VL bus dma tag */
-	if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/1, /*boundary*/0,
-                               lowaddr, /*highaddr*/BUS_SPACE_MAXADDR,
-                               filter, filter_arg,
-                               /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
-                               /*nsegments*/~0,
-                               /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-                               /*flags*/0, &bt->parent_dmat) != 0) {
+	if (bus_dma_tag_create(	/* parent	*/ NULL,
+				/* alignemnt	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ lowaddr,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ filter,
+				/* filterarg	*/ filter_arg,
+				/* maxsize	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* nsegments	*/ ~0,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* flags	*/ 0,
+				&bt->parent_dmat) != 0) {
 		bt_isa_release_resources(dev);
                 return (ENOMEM);
         }                              
@@ -251,16 +256,20 @@ bt_isa_attach(device_t dev)
 
 	if (lowaddr != BUS_SPACE_MAXADDR_32BIT) {
 		/* DMA tag for our sense buffers */
-		if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/1,
-				       /*boundary*/0,
-				       /*lowaddr*/BUS_SPACE_MAXADDR,
-				       /*highaddr*/BUS_SPACE_MAXADDR,
-				       /*filter*/NULL, /*filterarg*/NULL,
-				       bt->max_ccbs
-					   * sizeof(struct scsi_sense_data),
-				       /*nsegments*/1,
-				       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-				       /*flags*/0, &bt->sense_dmat) != 0) {
+		if (bus_dma_tag_create(
+				/* parent	*/ bt->parent_dmat,
+				/* alignment	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ BUS_SPACE_MAXADDR,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ bt->max_ccbs *
+						   sizeof(struct scsi_sense_data),
+				/* nsegments	*/ 1,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* flags	*/ 0,
+				&bt->sense_dmat) != 0) {
 			bt_isa_release_resources(dev);
 			return (ENOMEM);
 		}
diff --git a/sys/dev/buslogic/bt_mca.c b/sys/dev/buslogic/bt_mca.c
index d419690..cf237e1 100644
--- a/sys/dev/buslogic/bt_mca.c
+++ b/sys/dev/buslogic/bt_mca.c
@@ -217,15 +217,18 @@ bt_mca_attach (device_t dev)
 	isa_dmacascade(rman_get_start(bt->drq));
 
 	/* Allocate a dmatag for our CCB DMA maps */
-	if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/1, /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR_24BIT,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/btvlbouncefilter,
-			       /*filterarg*/bt,
-			       /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*nsegments*/~0,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*flags*/0, &bt->parent_dmat) != 0) {
+	if (bus_dma_tag_create( /* parent	*/ NULL,
+				/* alignemnt	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ BUS_SPACE_MAXADDR_24BIT,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ btvlbouncefilter,
+				/* filterarg	*/ bt,
+				/* maxsize	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* nsegments	*/ ~0,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* flags	*/ 0,
+				&bt->parent_dmat) != 0) {
 		bt_mca_release_resources(dev);
 		return (ENOMEM);
 	}
@@ -236,15 +239,19 @@ bt_mca_attach (device_t dev)
 	}
 
 	/* DMA tag for our sense buffers */
-	if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/1, 
-			       /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR,    
-			       /*highaddr*/BUS_SPACE_MAXADDR,   
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       bt->max_ccbs * sizeof(struct scsi_sense_data),
-			       /*nsegments*/1,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*flags*/0, &bt->sense_dmat) != 0) {
+	if (bus_dma_tag_create(	/* parent	*/ bt->parent_dmat,
+				/* alignment	*/ 1, 
+				/* boundary	*/ 0,
+				/* lowaddr	*/ BUS_SPACE_MAXADDR,    
+				/* highaddr	*/ BUS_SPACE_MAXADDR,   
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ bt->max_ccbs *
+						   sizeof(struct scsi_sense_data),
+				/* nsegments	*/ 1,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* flags	*/ 0,
+				&bt->sense_dmat) != 0) {
 		bt_mca_release_resources(dev);
 		return (ENOMEM);
 	}
diff --git a/sys/dev/buslogic/bt_pci.c b/sys/dev/buslogic/bt_pci.c
index d3deb70..f2f6158 100644
--- a/sys/dev/buslogic/bt_pci.c
+++ b/sys/dev/buslogic/bt_pci.c
@@ -173,14 +173,18 @@ bt_pci_attach(device_t dev)
 
 	/* Allocate a dmatag for our CCB DMA maps */
 	/* XXX Should be a child of the PCI bus dma tag */
-	if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/1, /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*nsegments*/~0,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*flags*/0, &bt->parent_dmat) != 0) {
+	if (bus_dma_tag_create(	/* parent	*/ NULL,
+				/* alignemnt	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ BUS_SPACE_MAXADDR_32BIT,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* nsegments	*/ ~0,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* flags	*/ 0,
+				&bt->parent_dmat) != 0) {
 		bt_pci_release_resources(dev);
 		return (ENOMEM);
 	}
diff --git a/sys/dev/dpt/dpt_scsi.c b/sys/dev/dpt/dpt_scsi.c
index 922e95b..81090e2 100644
--- a/sys/dev/dpt/dpt_scsi.c
+++ b/sys/dev/dpt/dpt_scsi.c
@@ -1318,13 +1318,18 @@ dpt_init(struct dpt_softc *dpt)
 	/* XXX Shouldn't we poll a status register or something??? */
 #endif
 	/* DMA tag for our S/G structures.  We allocate in page sized chunks */
-	if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       PAGE_SIZE, /*nsegments*/1,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*flags*/0, &dpt->sg_dmat) != 0) {
+	if (bus_dma_tag_create(	/* parent	*/ dpt->parent_dmat,
+				/* alignment	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ BUS_SPACE_MAXADDR,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ PAGE_SIZE,
+				/* nsegments	*/ 1,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* flags	*/ 0,
+				&dpt->sg_dmat) != 0) {
 		goto error_exit;
         }
 
@@ -1440,14 +1445,18 @@ dpt_init(struct dpt_softc *dpt)
 		dpt->sgsize = dpt_max_segs;
 	
 	/* DMA tag for mapping buffers into device visible space. */
-	if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       /*maxsize*/MAXBSIZE, /*nsegments*/dpt->sgsize,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*flags*/BUS_DMA_ALLOCNOW,
-			       &dpt->buffer_dmat) != 0) {
+	if (bus_dma_tag_create(	/* parent	*/ dpt->parent_dmat,
+				/* alignment	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ BUS_SPACE_MAXADDR,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ MAXBSIZE,
+				/* nsegments	*/ dpt->sgsize,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* flags	*/ BUS_DMA_ALLOCNOW,
+				&dpt->buffer_dmat) != 0) {
 		printf("dpt: bus_dma_tag_create(...,dpt->buffer_dmat) failed\n");
 		goto error_exit;
 	}
@@ -1455,15 +1464,20 @@ dpt_init(struct dpt_softc *dpt)
 	dpt->init_level++;
 
 	/* DMA tag for our ccb structures and interrupt status packet */
-	if (bus_dma_tag_create(dpt->parent_dmat, /*alignment*/1, /*boundary*/0,
-			       /*lowaddr*/BUS_SPACE_MAXADDR,
-			       /*highaddr*/BUS_SPACE_MAXADDR,
-			       /*filter*/NULL, /*filterarg*/NULL,
-			       (dpt->max_dccbs * sizeof(struct dpt_ccb))
-			       + sizeof(dpt_sp_t),
-			       /*nsegments*/1,
-			       /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
-			       /*flags*/0, &dpt->dccb_dmat) != 0) {
+	if (bus_dma_tag_create(	/* parent	*/ dpt->parent_dmat,
+				/* alignment	*/ 1,
+				/* boundary	*/ 0,
+				/* lowaddr	*/ BUS_SPACE_MAXADDR,
+				/* highaddr	*/ BUS_SPACE_MAXADDR,
+				/* filter	*/ NULL,
+				/* filterarg	*/ NULL,
+				/* maxsize	*/ (dpt->max_dccbs *
+						    sizeof(struct dpt_ccb)) +
+						    sizeof(dpt_sp_t),
+				/* nsegments	*/ 1,
+				/* maxsegsz	*/ BUS_SPACE_MAXSIZE_32BIT,
+				/* flags	*/ 0,
+				&dpt->dccb_dmat) != 0) {
 		printf("dpt: bus_dma_tag_create(...,dpt->dccb_dmat) failed\n");
 		goto error_exit;
         }