Index: usb_busdma.h
===================================================================
--- usb_busdma.h	(revision 233234)
+++ usb_busdma.h	(working copy)
@@ -34,7 +34,7 @@
 
 /* defines */
 
-#define	USB_PAGE_SIZE PAGE_SIZE		/* use system PAGE_SIZE */
+#define	USB_PAGE_SIZE	4096
 
 #if (__FreeBSD_version >= 700020)
 #define	USB_GET_DMA_TAG(dev) bus_get_dma_tag(dev)
Index: usb_busdma.c
===================================================================
--- usb_busdma.c	(revision 233234)
+++ usb_busdma.c	(working copy)
@@ -358,14 +358,18 @@ usb_dma_tag_create(struct usb_dma_tag *udt,
 	if (bus_dma_tag_create
 	    ( /* parent    */ udt->tag_parent->tag,
 	     /* alignment */ align,
+#ifndef __sparc64__
 	     /* boundary  */ (align == 1) ?
 	    USB_PAGE_SIZE : 0,
+#else
+	    /* boundary  */ 0,
+#endif
 	     /* lowaddr   */ (2ULL << (udt->tag_parent->dma_bits - 1)) - 1,
 	     /* highaddr  */ BUS_SPACE_MAXADDR,
 	     /* filter    */ NULL,
 	     /* filterarg */ NULL,
 	     /* maxsize   */ size,
-	     /* nsegments */ (align == 1 && size > 1) ?
+	     /* nsegments */ (align == 1 && size > USB_PAGE_SIZE) ?
 	    (2 + (size / USB_PAGE_SIZE)) : 1,
 	     /* maxsegsz  */ (align == 1 && size > USB_PAGE_SIZE) ?
 	    USB_PAGE_SIZE : size,
@@ -516,7 +520,7 @@ usb_pc_alloc_mem(struct usb_page_cache *pc, struct
 		 * being less than "size". If that check fails we end
 		 * up using contigmalloc which is page based even for
 		 * small allocations. Try to avoid that to save
-		 * memory, hence we sometimes to a large number of
+		 * memory, hence we sometimes do a large number of
 		 * small allocations!
 		 */
 		if (size <= (USB_PAGE_SIZE / 2)) {
Index: usb_transfer.c
===================================================================
--- usb_transfer.c	(revision 233234)
+++ usb_transfer.c	(working copy)
@@ -217,12 +217,12 @@ usbd_transfer_setup_sub_malloc(struct usb_setup_pa
 	 * Try multi-allocation chunks to reduce the number of DMA
 	 * allocations, hence DMA allocations are slow.
 	 */
-	if (size >= PAGE_SIZE) {
+	if (size >= USB_PAGE_SIZE) {
 		n_dma_pc = count;
 		n_obj = 1;
 	} else {
 		/* compute number of objects per page */
-		n_obj = (PAGE_SIZE / size);
+		n_obj = (USB_PAGE_SIZE / size);
 		/*
 		 * Compute number of DMA chunks, rounded up
 		 * to nearest one: