iwlwifi: device tracing

In order to have an easier way to debug issues, create
trace events (using the ftrace framework) that will
allow us to follow exactly what the driver is doing
with the device.

The text format isn't all that useful, but the binary
format can also be obtained easily via debugfs and
then analysed on the fly or offline with debugging
tools.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 14 insertions, 2 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-io.h b/drivers/net/wireless/iwlwifi/iwl-io.h
index d30cb0275d19..0a078b082833 100644
--- a/drivers/net/wireless/iwlwifi/iwl-io.h
+++ b/drivers/net/wireless/iwlwifi/iwl-io.h
@@ -32,6 +32,7 @@
 #include <linux/io.h>
 
 #include "iwl-debug.h"
+#include "iwl-devtrace.h"
 
 /*
  * IO, register, and NIC memory access functions
@@ -61,7 +62,12 @@
  *
  */
 
-#define _iwl_write32(priv, ofs, val) iowrite32((val), (priv)->hw_base + (ofs))
+static inline void _iwl_write32(struct iwl_priv *priv, u32 ofs, u32 val)
+{
+        trace_iwlwifi_dev_iowrite32(priv, ofs, val);
+        iowrite32(val, priv->hw_base + ofs);
+}
+
 #ifdef CONFIG_IWLWIFI_DEBUG
 static inline void __iwl_write32(const char *f, u32 l, struct iwl_priv *priv,
                                  u32 ofs, u32 val)
@@ -75,7 +81,13 @@ static inline void __iwl_write32(const char *f, u32 l, struct iwl_priv *priv,
 #define iwl_write32(priv, ofs, val) _iwl_write32(priv, ofs, val)
 #endif
 
-#define _iwl_read32(priv, ofs) ioread32((priv)->hw_base + (ofs))
+static inline u32 _iwl_read32(struct iwl_priv *priv, u32 ofs)
+{
+        u32 val = ioread32(priv->hw_base + ofs);
+        trace_iwlwifi_dev_ioread32(priv, ofs, val);
+        return val;
+}
+
 #ifdef CONFIG_IWLWIFI_DEBUG
 static inline u32 __iwl_read32(char *f, u32 l, struct iwl_priv *priv, u32 ofs)
 {