mac80211: pass queue bitmap to flush operation

There are a number of situations in which mac80211 only
really needs to flush queues for one virtual interface,
and in fact during this frames might be transmitted on
other virtual interfaces. Calculate and pass a queue
bitmap to the driver so it knows which queues to flush.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

23 files changed, 67 insertions, 34 deletions

diff --git a/drivers/net/wireless/ath/ar5523/ar5523.c b/drivers/net/wireless/ath/ar5523/ar5523.c
index 7157f7d311c5..afd1e36d308f 100644
--- a/drivers/net/wireless/ath/ar5523/ar5523.c
+++ b/drivers/net/wireless/ath/ar5523/ar5523.c
@@ -1091,7 +1091,7 @@ static int ar5523_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
         return ret;
 }
 
-static void ar5523_flush(struct ieee80211_hw *hw, bool drop)
+static void ar5523_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
 {
         struct ar5523 *ar = hw->priv;
 
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 6e66f9c6782b..24650fd41694 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1745,7 +1745,7 @@ static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
         mutex_unlock(&sc->mutex);
 }
 
-static void ath9k_flush(struct ieee80211_hw *hw, bool drop)
+static void ath9k_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
 {
         struct ath_softc *sc = hw->priv;
         struct ath_hw *ah = sc->sc_ah;
diff --git a/drivers/net/wireless/ath/carl9170/main.c b/drivers/net/wireless/ath/carl9170/main.c
index f293b3ff4756..08b193199946 100644
--- a/drivers/net/wireless/ath/carl9170/main.c
+++ b/drivers/net/wireless/ath/carl9170/main.c
@@ -1703,7 +1703,7 @@ found:
         return 0;
 }
 
-static void carl9170_op_flush(struct ieee80211_hw *hw, bool drop)
+static void carl9170_op_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
 {
         struct ar9170 *ar = hw->priv;
         unsigned int vid;
diff --git a/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c b/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c
index c6451c61407a..aa5f43fee5ed 100644
--- a/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c
+++ b/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c
@@ -723,7 +723,7 @@ static bool brcms_tx_flush_completed(struct brcms_info *wl)
         return result;
 }
 
-static void brcms_ops_flush(struct ieee80211_hw *hw, bool drop)
+static void brcms_ops_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
 {
         struct brcms_info *wl = hw->priv;
         int ret;
diff --git a/drivers/net/wireless/iwlegacy/common.c b/drivers/net/wireless/iwlegacy/common.c
index e006ea831320..722bfb57cfd5 100644
--- a/drivers/net/wireless/iwlegacy/common.c
+++ b/drivers/net/wireless/iwlegacy/common.c
@@ -4704,8 +4704,7 @@ out:
 }
 EXPORT_SYMBOL(il_mac_change_interface);
 
-void
-il_mac_flush(struct ieee80211_hw *hw, bool drop)
+void il_mac_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
 {
         struct il_priv *il = hw->priv;
         unsigned long timeout = jiffies + msecs_to_jiffies(500);
diff --git a/drivers/net/wireless/iwlegacy/common.h b/drivers/net/wireless/iwlegacy/common.h
index 73bd3ef316c8..728aa1306ab8 100644
--- a/drivers/net/wireless/iwlegacy/common.h
+++ b/drivers/net/wireless/iwlegacy/common.h
@@ -1720,7 +1720,7 @@ void il_mac_remove_interface(struct ieee80211_hw *hw,
                              struct ieee80211_vif *vif);
 int il_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
                             enum nl80211_iftype newtype, bool newp2p);
-void il_mac_flush(struct ieee80211_hw *hw, bool drop);
+void il_mac_flush(struct ieee80211_hw *hw, u32 queues, bool drop);
 int il_alloc_txq_mem(struct il_priv *il);
 void il_free_txq_mem(struct il_priv *il);
 
diff --git a/drivers/net/wireless/iwlwifi/dvm/mac80211.c b/drivers/net/wireless/iwlwifi/dvm/mac80211.c
index c7cd2dffa5cd..a7294fa4d7e5 100644
--- a/drivers/net/wireless/iwlwifi/dvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/dvm/mac80211.c
@@ -1100,7 +1100,7 @@ static void iwlagn_configure_filter(struct ieee80211_hw *hw,
                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
 }
 
-static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
+static void iwlagn_mac_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
 {
         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 
diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index 7490c4fc7177..3466f1a8a8d3 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -1389,7 +1389,7 @@ static int mac80211_hwsim_ampdu_action(struct ieee80211_hw *hw,
         return 0;
 }
 
-static void mac80211_hwsim_flush(struct ieee80211_hw *hw, bool drop)
+static void mac80211_hwsim_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
 {
         /* Not implemented, queues only on kernel side */
 }
diff --git a/drivers/net/wireless/p54/main.c b/drivers/net/wireless/p54/main.c
index aadda99989c0..ee654a691f38 100644
--- a/drivers/net/wireless/p54/main.c
+++ b/drivers/net/wireless/p54/main.c
@@ -670,7 +670,7 @@ static unsigned int p54_flush_count(struct p54_common *priv)
         return total;
 }
 
-static void p54_flush(struct ieee80211_hw *dev, bool drop)
+static void p54_flush(struct ieee80211_hw *dev, u32 queues, bool drop)
 {
         struct p54_common *priv = dev->priv;
         unsigned int total, i;
diff --git a/drivers/net/wireless/rt2x00/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h
index 086abb403a4f..041b392f4f47 100644
--- a/drivers/net/wireless/rt2x00/rt2x00.h
+++ b/drivers/net/wireless/rt2x00/rt2x00.h
@@ -1360,7 +1360,7 @@ int rt2x00mac_conf_tx(struct ieee80211_hw *hw,
                       struct ieee80211_vif *vif, u16 queue,
                       const struct ieee80211_tx_queue_params *params);
 void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw);
-void rt2x00mac_flush(struct ieee80211_hw *hw, bool drop);
+void rt2x00mac_flush(struct ieee80211_hw *hw, u32 queues, bool drop);
 int rt2x00mac_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant);
 int rt2x00mac_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant);
 void rt2x00mac_get_ringparam(struct ieee80211_hw *hw,
diff --git a/drivers/net/wireless/rt2x00/rt2x00mac.c b/drivers/net/wireless/rt2x00/rt2x00mac.c
index 20c6eccce5aa..9161c02d8ff9 100644
--- a/drivers/net/wireless/rt2x00/rt2x00mac.c
+++ b/drivers/net/wireless/rt2x00/rt2x00mac.c
@@ -748,7 +748,7 @@ void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw)
 }
 EXPORT_SYMBOL_GPL(rt2x00mac_rfkill_poll);
 
-void rt2x00mac_flush(struct ieee80211_hw *hw, bool drop)
+void rt2x00mac_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
 {
         struct rt2x00_dev *rt2x00dev = hw->priv;
         struct data_queue *queue;
diff --git a/drivers/net/wireless/rtlwifi/core.c b/drivers/net/wireless/rtlwifi/core.c
index d3ce9fbef00e..b5a7a260bf63 100644
--- a/drivers/net/wireless/rtlwifi/core.c
+++ b/drivers/net/wireless/rtlwifi/core.c
@@ -1166,7 +1166,7 @@ static void rtl_op_rfkill_poll(struct ieee80211_hw *hw)
  * before switch channle or power save, or tx buffer packet
  * maybe send after offchannel or rf sleep, this may cause
  * dis-association by AP */
-static void rtl_op_flush(struct ieee80211_hw *hw, bool drop)
+static void rtl_op_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
 {
         struct rtl_priv *rtlpriv = rtl_priv(hw);
 
diff --git a/drivers/net/wireless/ti/wlcore/main.c b/drivers/net/wireless/ti/wlcore/main.c
index d7e306333f6c..a9f7041c7192 100644
--- a/drivers/net/wireless/ti/wlcore/main.c
+++ b/drivers/net/wireless/ti/wlcore/main.c
@@ -4946,7 +4946,7 @@ out:
         mutex_unlock(&wl->mutex);
 }
 
-static void wlcore_op_flush(struct ieee80211_hw *hw, bool drop)
+static void wlcore_op_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
 {
         struct wl1271 *wl = hw->priv;
 
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 0b912d22f82d..4158da74e11b 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -2438,8 +2438,11 @@ enum ieee80211_roc_type {
  * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep.
  *
  * @flush: Flush all pending frames from the hardware queue, making sure
- *      that the hardware queues are empty. If the parameter @drop is set
- *      to %true, pending frames may be dropped. The callback can sleep.
+ *      that the hardware queues are empty. The @queues parameter is a bitmap
+ *      of queues to flush, which is useful if different virtual interfaces
+ *      use different hardware queues; it may also indicate all queues.
+ *      If the parameter @drop is set to %true, pending frames may be dropped.
+ *      The callback can sleep.
  *
  * @channel_switch: Drivers that need (or want) to offload the channel
  *      switch operation for CSAs received from the AP may implement this
@@ -2687,7 +2690,7 @@ struct ieee80211_ops {
                              struct netlink_callback *cb,
                              void *data, int len);
 #endif
-        void (*flush)(struct ieee80211_hw *hw, bool drop);
+        void (*flush)(struct ieee80211_hw *hw, u32 queues, bool drop);
         void (*channel_switch)(struct ieee80211_hw *hw,
                                struct ieee80211_channel_switch *ch_switch);
         int (*napi_poll)(struct ieee80211_hw *hw, int budget);
diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
index 7b9ff53bd2e9..169664c122e2 100644
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -720,13 +720,14 @@ static inline void drv_rfkill_poll(struct ieee80211_local *local)
                 local->ops->rfkill_poll(&local->hw);
 }
 
-static inline void drv_flush(struct ieee80211_local *local, bool drop)
+static inline void drv_flush(struct ieee80211_local *local,
+                             u32 queues, bool drop)
 {
         might_sleep();
 
-        trace_drv_flush(local, drop);
+        trace_drv_flush(local, queues, drop);
         if (local->ops->flush)
-                local->ops->flush(&local->hw, drop);
+                local->ops->flush(&local->hw, queues, drop);
         trace_drv_return_void(local);
 }
 
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index d6e920609823..b96c0e977752 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1540,6 +1540,8 @@ static inline void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 {
         ieee80211_add_pending_skbs_fn(local, skbs, NULL, NULL);
 }
+void ieee80211_flush_queues(struct ieee80211_local *local,
+                            struct ieee80211_sub_if_data *sdata);
 
 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
                          u16 transaction, u16 auth_alg, u16 status,
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 80e838bc875d..d646e12e55a6 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -92,7 +92,7 @@ static u32 ieee80211_idle_on(struct ieee80211_local *local)
         if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
                 return 0;
 
-        drv_flush(local, false);
+        ieee80211_flush_queues(local, NULL);
 
         local->hw.conf.flags |= IEEE80211_CONF_IDLE;
         return IEEE80211_CONF_CHANGE_IDLE;
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index fdc06e381c10..65b38e13eb0c 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1436,7 +1436,7 @@ void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
                 else {
                         ieee80211_send_nullfunc(local, sdata, 1);
                         /* Flush to get the tx status of nullfunc frame */
-                        drv_flush(local, false);
+                        ieee80211_flush_queues(local, sdata);
                 }
         }
 
@@ -1767,7 +1767,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 
         /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
         if (tx)
-                drv_flush(local, false);
+                ieee80211_flush_queues(local, sdata);
 
         /* deauthenticate/disassociate now */
         if (tx || frame_buf)
@@ -1776,7 +1776,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 
         /* flush out frame */
         if (tx)
-                drv_flush(local, false);
+                ieee80211_flush_queues(local, sdata);
 
         /* clear bssid only after building the needed mgmt frames */
         memset(ifmgd->bssid, 0, ETH_ALEN);
@@ -1948,7 +1948,7 @@ static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
         ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
         run_again(ifmgd, ifmgd->probe_timeout);
         if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
-                drv_flush(sdata->local, false);
+                ieee80211_flush_queues(sdata->local, sdata);
 }
 
 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
diff --git a/net/mac80211/offchannel.c b/net/mac80211/offchannel.c
index db547fceaeb9..d32f514074b9 100644
--- a/net/mac80211/offchannel.c
+++ b/net/mac80211/offchannel.c
@@ -120,7 +120,7 @@ void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local)
          */
         ieee80211_stop_queues_by_reason(&local->hw,
                                         IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL);
-        drv_flush(local, false);
+        ieee80211_flush_queues(local, NULL);
 
         mutex_lock(&local->iflist_mtx);
         list_for_each_entry(sdata, &local->interfaces, list) {
@@ -373,7 +373,7 @@ void ieee80211_sw_roc_work(struct work_struct *work)
                 ieee80211_roc_notify_destroy(roc);
 
                 if (started) {
-                        drv_flush(local, false);
+                        ieee80211_flush_queues(local, NULL);
 
                         local->tmp_channel = NULL;
                         ieee80211_hw_config(local, 0);
diff --git a/net/mac80211/pm.c b/net/mac80211/pm.c
index b471a67f224d..497f21a0d116 100644
--- a/net/mac80211/pm.c
+++ b/net/mac80211/pm.c
@@ -35,7 +35,7 @@ int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
         /* flush out all packets */
         synchronize_net();
 
-        drv_flush(local, false);
+        ieee80211_flush_queues(local, NULL);
 
         local->quiescing = true;
         /* make quiescing visible to timers everywhere */
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 5dc17c623f72..cb34cbbaa20c 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -332,7 +332,7 @@ static int ieee80211_start_sw_scan(struct ieee80211_local *local)
         ieee80211_offchannel_stop_vifs(local);
 
         /* ensure nullfunc is transmitted before leaving operating channel */
-        drv_flush(local, false);
+        ieee80211_flush_queues(local, NULL);
 
         ieee80211_configure_filter(local);
 
@@ -668,7 +668,7 @@ static void ieee80211_scan_state_resume(struct ieee80211_local *local,
         ieee80211_offchannel_stop_vifs(local);
 
         if (local->ops->flush) {
-                drv_flush(local, false);
+                ieee80211_flush_queues(local, NULL);
                 *next_delay = 0;
         } else
                 *next_delay = HZ / 10;
diff --git a/net/mac80211/trace.h b/net/mac80211/trace.h
index d97e4305cf1e..c5899797a8d4 100644
--- a/net/mac80211/trace.h
+++ b/net/mac80211/trace.h
@@ -964,23 +964,26 @@ TRACE_EVENT(drv_get_survey,
 );
 
 TRACE_EVENT(drv_flush,
-        TP_PROTO(struct ieee80211_local *local, bool drop),
+        TP_PROTO(struct ieee80211_local *local,
+                 u32 queues, bool drop),
 
-        TP_ARGS(local, drop),
+        TP_ARGS(local, queues, drop),
 
         TP_STRUCT__entry(
                 LOCAL_ENTRY
                 __field(bool, drop)
+                __field(u32, queues)
         ),
 
         TP_fast_assign(
                 LOCAL_ASSIGN;
                 __entry->drop = drop;
+                __entry->queues = queues;
         ),
 
         TP_printk(
-                LOCAL_PR_FMT " drop:%d",
-                LOCAL_PR_ARG, __entry->drop
+                LOCAL_PR_FMT " queues:0x%x drop:%d",
+                LOCAL_PR_ARG, __entry->queues, __entry->drop
         )
 );
 
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index b7a856e3281b..f978ddd1bb43 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -511,6 +511,31 @@ void ieee80211_wake_queues(struct ieee80211_hw *hw)
 }
 EXPORT_SYMBOL(ieee80211_wake_queues);
 
+void ieee80211_flush_queues(struct ieee80211_local *local,
+                            struct ieee80211_sub_if_data *sdata)
+{
+        u32 queues;
+
+        if (!local->ops->flush)
+                return;
+
+        if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
+                int ac;
+
+                queues = 0;
+
+                for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
+                        queues |= BIT(sdata->vif.hw_queue[ac]);
+                if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
+                        queues |= BIT(sdata->vif.cab_queue);
+        } else {
+                /* all queues */
+                queues = BIT(local->hw.queues) - 1;
+        }
+
+        drv_flush(local, queues, false);
+}
+
 void ieee80211_iterate_active_interfaces(
         struct ieee80211_hw *hw, u32 iter_flags,
         void (*iterator)(void *data, u8 *mac,