8 files changed, 303 insertions, 4 deletions

diff --git a/net/mac80211/Kconfig b/net/mac80211/Kconfig
index 334c359da5e8..8a91f6c0bb18 100644
--- a/net/mac80211/Kconfig
+++ b/net/mac80211/Kconfig
@@ -221,8 +221,8 @@ config MAC80211_DRIVER_API_TRACER
         depends on EVENT_TRACING
         help
           Say Y here to make mac80211 register with the ftrace
-          framework for the driver API -- you can see which
-          driver methods it is calling then by looking at the
-          trace.
+          framework for the driver API -- you can then see which
+          driver methods it is calling and which API functions
+          drivers are calling by looking at the trace.
 
-          If unsure, say N.
+          If unsure, say Y.
diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c
index 32d2148b5b98..6bb4d0a1e5c5 100644
--- a/net/mac80211/agg-tx.c
+++ b/net/mac80211/agg-tx.c
@@ -214,6 +214,8 @@ int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid)
         int ret = 0;
         u16 start_seq_num;
 
+        trace_api_start_tx_ba_session(pubsta, tid);
+
         if (WARN_ON(!local->ops->ampdu_action))
                 return -EINVAL;
 
@@ -440,6 +442,8 @@ void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid)
         struct sta_info *sta;
         u8 *state;
 
+        trace_api_start_tx_ba_cb(sdata, ra, tid);
+
         if (tid >= STA_TID_NUM) {
 #ifdef CONFIG_MAC80211_HT_DEBUG
                 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
@@ -541,6 +545,8 @@ int ieee80211_stop_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid,
         struct ieee80211_sub_if_data *sdata = sta->sdata;
         struct ieee80211_local *local = sdata->local;
 
+        trace_api_stop_tx_ba_session(pubsta, tid, initiator);
+
         if (!local->ops->ampdu_action)
                 return -EINVAL;
 
@@ -558,6 +564,8 @@ void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid)
         struct sta_info *sta;
         u8 *state;
 
+        trace_api_stop_tx_ba_cb(sdata, ra, tid);
+
         if (tid >= STA_TID_NUM) {
 #ifdef CONFIG_MAC80211_HT_DEBUG
                 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
diff --git a/net/mac80211/driver-trace.h b/net/mac80211/driver-trace.h
index 41baf730a5c7..e209cb82ff29 100644
--- a/net/mac80211/driver-trace.h
+++ b/net/mac80211/driver-trace.h
@@ -32,6 +32,10 @@ static inline void trace_ ## name(proto) {}
 #define VIF_PR_FMT      " vif:%s(%d)"
 #define VIF_PR_ARG      __get_str(vif_name), __entry->vif_type
 
+/*
+ * Tracing for driver callbacks.
+ */
+
 TRACE_EVENT(drv_start,
         TP_PROTO(struct ieee80211_local *local, int ret),
 
@@ -766,6 +770,277 @@ TRACE_EVENT(drv_flush,
                 LOCAL_PR_ARG, __entry->drop
         )
 );
+
+/*
+ * Tracing for API calls that drivers call.
+ */
+
+TRACE_EVENT(api_start_tx_ba_session,
+        TP_PROTO(struct ieee80211_sta *sta, u16 tid),
+
+        TP_ARGS(sta, tid),
+
+        TP_STRUCT__entry(
+                STA_ENTRY
+                __field(u16, tid)
+        ),
+
+        TP_fast_assign(
+                STA_ASSIGN;
+                __entry->tid = tid;
+        ),
+
+        TP_printk(
+                STA_PR_FMT " tid:%d",
+                STA_PR_ARG, __entry->tid
+        )
+);
+
+TRACE_EVENT(api_start_tx_ba_cb,
+        TP_PROTO(struct ieee80211_sub_if_data *sdata, const u8 *ra, u16 tid),
+
+        TP_ARGS(sdata, ra, tid),
+
+        TP_STRUCT__entry(
+                VIF_ENTRY
+                __array(u8, ra, ETH_ALEN)
+                __field(u16, tid)
+        ),
+
+        TP_fast_assign(
+                VIF_ASSIGN;
+                memcpy(__entry->ra, ra, ETH_ALEN);
+                __entry->tid = tid;
+        ),
+
+        TP_printk(
+                VIF_PR_FMT " ra:%pM tid:%d",
+                VIF_PR_ARG, __entry->ra, __entry->tid
+        )
+);
+
+TRACE_EVENT(api_stop_tx_ba_session,
+        TP_PROTO(struct ieee80211_sta *sta, u16 tid, u16 initiator),
+
+        TP_ARGS(sta, tid, initiator),
+
+        TP_STRUCT__entry(
+                STA_ENTRY
+                __field(u16, tid)
+                __field(u16, initiator)
+        ),
+
+        TP_fast_assign(
+                STA_ASSIGN;
+                __entry->tid = tid;
+                __entry->initiator = initiator;
+        ),
+
+        TP_printk(
+                STA_PR_FMT " tid:%d initiator:%d",
+                STA_PR_ARG, __entry->tid, __entry->initiator
+        )
+);
+
+TRACE_EVENT(api_stop_tx_ba_cb,
+        TP_PROTO(struct ieee80211_sub_if_data *sdata, const u8 *ra, u16 tid),
+
+        TP_ARGS(sdata, ra, tid),
+
+        TP_STRUCT__entry(
+                VIF_ENTRY
+                __array(u8, ra, ETH_ALEN)
+                __field(u16, tid)
+        ),
+
+        TP_fast_assign(
+                VIF_ASSIGN;
+                memcpy(__entry->ra, ra, ETH_ALEN);
+                __entry->tid = tid;
+        ),
+
+        TP_printk(
+                VIF_PR_FMT " ra:%pM tid:%d",
+                VIF_PR_ARG, __entry->ra, __entry->tid
+        )
+);
+
+TRACE_EVENT(api_restart_hw,
+        TP_PROTO(struct ieee80211_local *local),
+
+        TP_ARGS(local),
+
+        TP_STRUCT__entry(
+                LOCAL_ENTRY
+        ),
+
+        TP_fast_assign(
+                LOCAL_ASSIGN;
+        ),
+
+        TP_printk(
+                LOCAL_PR_FMT,
+                LOCAL_PR_ARG
+        )
+);
+
+TRACE_EVENT(api_beacon_loss,
+        TP_PROTO(struct ieee80211_sub_if_data *sdata),
+
+        TP_ARGS(sdata),
+
+        TP_STRUCT__entry(
+                VIF_ENTRY
+        ),
+
+        TP_fast_assign(
+                VIF_ASSIGN;
+        ),
+
+        TP_printk(
+                VIF_PR_FMT,
+                VIF_PR_ARG
+        )
+);
+
+TRACE_EVENT(api_connection_loss,
+        TP_PROTO(struct ieee80211_sub_if_data *sdata),
+
+        TP_ARGS(sdata),
+
+        TP_STRUCT__entry(
+                VIF_ENTRY
+        ),
+
+        TP_fast_assign(
+                VIF_ASSIGN;
+        ),
+
+        TP_printk(
+                VIF_PR_FMT,
+                VIF_PR_ARG
+        )
+);
+
+TRACE_EVENT(api_cqm_rssi_notify,
+        TP_PROTO(struct ieee80211_sub_if_data *sdata,
+                 enum nl80211_cqm_rssi_threshold_event rssi_event),
+
+        TP_ARGS(sdata, rssi_event),
+
+        TP_STRUCT__entry(
+                VIF_ENTRY
+                __field(u32, rssi_event)
+        ),
+
+        TP_fast_assign(
+                VIF_ASSIGN;
+                __entry->rssi_event = rssi_event;
+        ),
+
+        TP_printk(
+                VIF_PR_FMT " event:%d",
+                VIF_PR_ARG, __entry->rssi_event
+        )
+);
+
+TRACE_EVENT(api_scan_completed,
+        TP_PROTO(struct ieee80211_local *local, bool aborted),
+
+        TP_ARGS(local, aborted),
+
+        TP_STRUCT__entry(
+                LOCAL_ENTRY
+                __field(bool, aborted)
+        ),
+
+        TP_fast_assign(
+                LOCAL_ASSIGN;
+                __entry->aborted = aborted;
+        ),
+
+        TP_printk(
+                LOCAL_PR_FMT " aborted:%d",
+                LOCAL_PR_ARG, __entry->aborted
+        )
+);
+
+TRACE_EVENT(api_sta_block_awake,
+        TP_PROTO(struct ieee80211_local *local,
+                 struct ieee80211_sta *sta, bool block),
+
+        TP_ARGS(local, sta, block),
+
+        TP_STRUCT__entry(
+                LOCAL_ENTRY
+                STA_ENTRY
+                __field(bool, block)
+        ),
+
+        TP_fast_assign(
+                LOCAL_ASSIGN;
+                STA_ASSIGN;
+                __entry->block = block;
+        ),
+
+        TP_printk(
+                LOCAL_PR_FMT STA_PR_FMT " block:%d",
+                LOCAL_PR_ARG, STA_PR_FMT, __entry->block
+        )
+);
+
+/*
+ * Tracing for internal functions
+ * (which may also be called in response to driver calls)
+ */
+
+TRACE_EVENT(wake_queue,
+        TP_PROTO(struct ieee80211_local *local, u16 queue,
+                 enum queue_stop_reason reason),
+
+        TP_ARGS(local, queue, reason),
+
+        TP_STRUCT__entry(
+                LOCAL_ENTRY
+                __field(u16, queue)
+                __field(u32, reason)
+        ),
+
+        TP_fast_assign(
+                LOCAL_ASSIGN;
+                __entry->queue = queue;
+                __entry->reason = reason;
+        ),
+
+        TP_printk(
+                LOCAL_PR_FMT " queue:%d, reason:%d",
+                LOCAL_PR_ARG, __entry->queue, __entry->reason
+        )
+);
+
+TRACE_EVENT(stop_queue,
+        TP_PROTO(struct ieee80211_local *local, u16 queue,
+                 enum queue_stop_reason reason),
+
+        TP_ARGS(local, queue, reason),
+
+        TP_STRUCT__entry(
+                LOCAL_ENTRY
+                __field(u16, queue)
+                __field(u32, reason)
+        ),
+
+        TP_fast_assign(
+                LOCAL_ASSIGN;
+                __entry->queue = queue;
+                __entry->reason = reason;
+        ),
+
+        TP_printk(
+                LOCAL_PR_FMT " queue:%d, reason:%d",
+                LOCAL_PR_ARG, __entry->queue, __entry->reason
+        )
+);
 #endif /* !__MAC80211_DRIVER_TRACE || TRACE_HEADER_MULTI_READ */
 
 #undef TRACE_INCLUDE_PATH
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index b887e484ae04..4afe851cf8dc 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -309,6 +309,8 @@ void ieee80211_restart_hw(struct ieee80211_hw *hw)
 {
         struct ieee80211_local *local = hw_to_local(hw);
 
+        trace_api_restart_hw(local);
+
         /* use this reason, __ieee80211_resume will unblock it */
         ieee80211_stop_queues_by_reason(hw,
                 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 461167dfa42c..d11a54c289a2 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1007,6 +1007,8 @@ void ieee80211_beacon_loss(struct ieee80211_vif *vif)
         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
         struct ieee80211_hw *hw = &sdata->local->hw;
 
+        trace_api_beacon_loss(sdata);
+
         WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);
         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
 }
@@ -1017,6 +1019,8 @@ void ieee80211_connection_loss(struct ieee80211_vif *vif)
         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
         struct ieee80211_hw *hw = &sdata->local->hw;
 
+        trace_api_connection_loss(sdata);
+
         WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));
         ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
 }
@@ -2261,6 +2265,8 @@ void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
 {
         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
 
+        trace_api_cqm_rssi_notify(sdata, rssi_event);
+
         cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
 }
 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 75a85978c3b3..eb86a5f6e645 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -247,6 +247,8 @@ void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted)
         struct ieee80211_local *local = hw_to_local(hw);
         bool was_hw_scan;
 
+        trace_api_scan_completed(local, aborted);
+
         mutex_lock(&local->scan_mtx);
 
         /*
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 4de987cbda1c..ff0eb948917b 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -957,6 +957,8 @@ void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
 {
         struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
 
+        trace_api_sta_block_awake(sta->local, pubsta, block);
+
         if (block)
                 set_sta_flags(sta, WLAN_STA_PS_DRIVER);
         else
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index ad9009f717ed..2b75b4fb68f4 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -270,6 +270,8 @@ static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
         struct ieee80211_local *local = hw_to_local(hw);
         struct ieee80211_sub_if_data *sdata;
 
+        trace_wake_queue(local, queue, reason);
+
         if (WARN_ON(queue >= hw->queues))
                 return;
 
@@ -312,6 +314,8 @@ static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
         struct ieee80211_local *local = hw_to_local(hw);
         struct ieee80211_sub_if_data *sdata;
 
+        trace_stop_queue(local, queue, reason);
+
         if (WARN_ON(queue >= hw->queues))
                 return;