From 1fae3d5fb62ef2d37dc7c62d6d901e8ff253175d Mon Sep 17 00:00:00 2001
From: Sepherosa Ziehau <sephe@dragonflybsd.org>
Date: Sun, 4 Jan 2009 19:50:53 +0800
Subject: [PATCH] - Add hw.busdma sysctl tree. - Add a node under it to show
 number bounce pages allocated.

---
 sys/platform/pc32/i386/busdma_machdep.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/sys/platform/pc32/i386/busdma_machdep.c b/sys/platform/pc32/i386/busdma_machdep.c
index 659af36..f1bb76a 100644
--- a/sys/platform/pc32/i386/busdma_machdep.c
+++ b/sys/platform/pc32/i386/busdma_machdep.c
@@ -34,6 +34,8 @@
 #include <sys/uio.h>
 #include <sys/thread2.h>
 #include <sys/bus_dma.h>
+#include <sys/kernel.h>
+#include <sys/sysctl.h>
 
 #include <vm/vm.h>
 #include <vm/vm_page.h>
@@ -104,6 +106,10 @@ static bus_addr_t add_bounce_page(bus_dma_tag_t dmat, bus_dmamap_t map,
 static void free_bounce_page(bus_dma_tag_t dmat, struct bounce_page *bpage);
 static __inline int run_filter(bus_dma_tag_t dmat, bus_addr_t paddr);
 
+SYSCTL_NODE(_hw, OID_AUTO, busdma, CTLFLAG_RD, 0, "Busdma parameters");
+SYSCTL_INT(_hw_busdma, OID_AUTO, total_bpages, CTLFLAG_RD, &total_bpages, 0,
+	   "Total bounce pages");
+
 static __inline int
 run_filter(bus_dma_tag_t dmat, bus_addr_t paddr)
 {
-- 
1.7.7.2