ath9k_hw: merge codepaths that access the cycle counter registers

The cycle counters are used by ANI to determine the amount of time that the
radio spent not receiving or transmitting. They're also used for debugging
purposes if the baseband watchdog on AR9003 detects a lockup.
In the future, we want to use these counters to determine the medium utilization
and export this information via survey. For that, we need to make sure that
the counter is only accessed from one place, which also ensures that
wraparounds won't occur at inconvenient points in time.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 8 insertions, 5 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ani.h b/drivers/net/wireless/ath/ath9k/ani.h
index f4d0a4d48b37..15f9d67a18c8 100644
--- a/drivers/net/wireless/ath/ath9k/ani.h
+++ b/drivers/net/wireless/ath/ath9k/ani.h
@@ -93,6 +93,13 @@ struct ath9k_mib_stats {
         u32 beacons;
 };
 
+struct ath_cycle_counters {
+        u32 cycles;
+        u32 rx_frame;
+        u32 rx_clear;
+        u32 tx_frame;
+};
+
 /* INI default values for ANI registers */
 struct ath9k_ani_default {
         u16 m1ThreshLow;
@@ -130,9 +137,6 @@ struct ar5416AniState {
         int32_t rssiThrLow;
         int32_t rssiThrHigh;
         u32 noiseFloor;
-        u32 txFrameCount;
-        u32 rxFrameCount;
-        u32 cycleCount;
         u32 ofdmPhyErrCount;
         u32 cckPhyErrCount;
         u32 ofdmPhyErrBase;
@@ -166,8 +170,7 @@ struct ar5416Stats {
 
 void ath9k_enable_mib_counters(struct ath_hw *ah);
 void ath9k_hw_disable_mib_counters(struct ath_hw *ah);
-u32 ath9k_hw_GetMibCycleCountsPct(struct ath_hw *ah, u32 *rxc_pcnt,
-                                  u32 *rxf_pcnt, u32 *txf_pcnt);
+void ath9k_hw_update_cycle_counters(struct ath_hw *ah);
 void ath9k_hw_ani_setup(struct ath_hw *ah);
 void ath9k_hw_ani_init(struct ath_hw *ah);
 int ath9k_hw_get_ani_channel_idx(struct ath_hw *ah,