Index: head/sys/arm64/arm64/busdma_bounce.c
===================================================================
--- head/sys/arm64/arm64/busdma_bounce.c
+++ head/sys/arm64/arm64/busdma_bounce.c
@@ -660,7 +660,7 @@
 /*
  * Add a single contiguous physical range to the segment list.
  */
-static int
+static bus_size_t
 _bus_dmamap_addseg(bus_dma_tag_t dmat, bus_dmamap_t map, bus_addr_t curaddr,
     bus_size_t sgsize, bus_dma_segment_t *segs, int *segp)
 {
Index: head/sys/x86/iommu/busdma_dmar.c
===================================================================
--- head/sys/x86/iommu/busdma_dmar.c
+++ head/sys/x86/iommu/busdma_dmar.c
@@ -686,7 +686,7 @@
 		return (ENOMEM);
 	fma = NULL;
 	for (i = 0; i < ma_cnt; i++) {
-		paddr = pstart + i * PAGE_SIZE;
+		paddr = pstart + ptoa(i);
 		ma[i] = PHYS_TO_VM_PAGE(paddr);
 		if (ma[i] == NULL || VM_PAGE_TO_PHYS(ma[i]) != paddr) {
 			/*
Index: head/sys/x86/x86/busdma_bounce.c
===================================================================
--- head/sys/x86/x86/busdma_bounce.c
+++ head/sys/x86/x86/busdma_bounce.c
@@ -667,7 +667,7 @@
 /*
  * Add a single contiguous physical range to the segment list.
  */
-static int
+static bus_size_t
 _bus_dmamap_addseg(bus_dma_tag_t dmat, bus_dmamap_t map, vm_paddr_t curaddr,
     bus_size_t sgsize, bus_dma_segment_t *segs, int *segp)
 {