iwlwifi: adding interrupt counter in debugfs for debugging
This patch adds interrupt statistics report to debugfs, this can help to
understand number of interrupts happened which including HW/SW error for
easier and better debugging.
in /sys/kernel/debug/ieee80211/phyN/iwlagn/data directory
use "cat interrupt" to view the current interrupt counter
use "echo 0 > interrupt" to clear interrupt counter
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index 59930f3..0922e33 100644
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -819,6 +819,21 @@
MEASUREMENT_ACTIVE = (1 << 1),
};
+/* interrupt statistics */
+struct isr_statistics {
+ u32 hw;
+ u32 sw;
+ u32 sw_err;
+ u32 sch;
+ u32 alive;
+ u32 rfkill;
+ u32 ctkill;
+ u32 wakeup;
+ u32 rx;
+ u32 rx_handlers[REPLY_MAX];
+ u32 tx;
+ u32 unhandled;
+};
#define IWL_MAX_NUM_QUEUES 20 /* FIXME: do dynamic allocation */
@@ -975,6 +990,9 @@
u64 bytes;
} tx_stats[3], rx_stats[3];
+ /* counts interrupts */
+ struct isr_statistics isr_stats;
+
struct iwl_power_mgr power_data;
struct iwl_notif_statistics statistics;