From: cem <cem@FreeBSD.org>
Date: Wed, 11 Nov 2015 18:55:53 +0000 (+0000)
Subject: ntb_hw: Similarly, add a debug-leveled macro for ntb_hw
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=ba49bb5baefacdaec55643cba2277f23f6ce9b6b;p=people%2Fliuw%2Ffreebsd.git

ntb_hw: Similarly, add a debug-leveled macro for ntb_hw

Sponsored by:	EMC / Isilon Storage Division
---

diff --git a/sys/dev/ntb/ntb_hw/ntb_hw.c b/sys/dev/ntb/ntb_hw/ntb_hw.c
index e2bcd9cb4c5..198051873c4 100644
--- a/sys/dev/ntb/ntb_hw/ntb_hw.c
+++ b/sys/dev/ntb/ntb_hw/ntb_hw.c
@@ -317,6 +317,15 @@ static int sysctl_handle_features(SYSCTL_HANDLER_ARGS);
 static int sysctl_handle_link_status(SYSCTL_HANDLER_ARGS);
 static int sysctl_handle_register(SYSCTL_HANDLER_ARGS);
 
+static unsigned g_ntb_hw_debug_level;
+SYSCTL_UINT(_hw_ntb, OID_AUTO, debug_level, CTLFLAG_RWTUN,
+    &g_ntb_hw_debug_level, 0, "ntb_hw log level -- higher is more verbose");
+#define ntb_printf(lvl, ...) do {				\
+	if ((lvl) <= g_ntb_hw_debug_level) {			\
+		device_printf(ntb->device, __VA_ARGS__);	\
+	}							\
+} while (0)
+
 static struct ntb_hw_info pci_ids[] = {
 	/* XXX: PS/SS IDs left out until they are supported. */
 	{ 0x0C4E8086, "BWD Atom Processor S1200 Non-Transparent Bridge B2B",