mac80211: store tx power value from user to station

This patch introduce a new driver callback drv_sta_set_txpwr. This API will
copy the transmit power value passed from user space and call the driver
callback to set the tx power for the station.

Co-developed-by: Balaji Pothunoori <bpothuno@codeaurora.org>
Signed-off-by: Ashok Raj Nagarajan <arnagara@codeaurora.org>
Signed-off-by: Balaji Pothunoori <bpothuno@codeaurora.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index c10abca..d66fbfe 100644 (file)
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1890,6 +1890,24 @@ struct ieee80211_sta_rates {
 };
 
 /**
+ * struct ieee80211_sta_txpwr - station txpower configuration
+ *
+ * Used to configure txpower for station.
+ *
+ * @power: indicates the tx power, in dBm, to be used when sending data frames
+ *     to the STA.
+ * @type: In particular if TPC %type is NL80211_TX_POWER_LIMITED then tx power
+ *     will be less than or equal to specified from userspace, whereas if TPC
+ *     %type is NL80211_TX_POWER_AUTOMATIC then it indicates default tx power.
+ *     NL80211_TX_POWER_FIXED is not a valid configuration option for
+ *     per peer TPC.
+ */
+struct ieee80211_sta_txpwr {
+       s16 power;
+       enum nl80211_tx_power_setting type;
+};
+
+/**
  * struct ieee80211_sta - station table entry
  *
  * A station table entry represents a station we are possibly
@@ -1975,6 +1993,7 @@ struct ieee80211_sta {
        bool support_p2p_ps;
        u16 max_rc_amsdu_len;
        u16 max_tid_amsdu_len[IEEE80211_NUM_TIDS];
+       struct ieee80211_sta_txpwr txpwr;
 
        struct ieee80211_txq *txq[IEEE80211_NUM_TIDS + 1];
 
@@ -3800,6 +3819,9 @@ struct ieee80211_ops {
 #endif
        void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
                        enum sta_notify_cmd, struct ieee80211_sta *sta);
+       int (*sta_set_txpwr)(struct ieee80211_hw *hw,
+                            struct ieee80211_vif *vif,
+                            struct ieee80211_sta *sta);
        int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
                         struct ieee80211_sta *sta,
                         enum ieee80211_sta_state old_state,

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 14bbb7e..ba6e408 100644 (file)
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1457,6 +1457,15 @@ static int sta_apply_parameters(struct ieee80211_local *local,
        if (params->listen_interval >= 0)
                sta->listen_interval = params->listen_interval;
 
+       if (params->sta_modify_mask & STATION_PARAM_APPLY_STA_TXPOWER) {
+               sta->sta.txpwr.type = params->txpwr.type;
+               if (params->txpwr.type == NL80211_TX_POWER_LIMITED)
+                       sta->sta.txpwr.power = params->txpwr.power;
+               ret = drv_sta_set_txpwr(local, sdata, sta);
+               if (ret)
+                       return ret;
+       }
+
        if (params->supported_rates) {
                ieee80211_parse_bitrates(&sdata->vif.bss_conf.chandef,
                                         sband, params->supported_rates,

diff --git a/net/mac80211/driver-ops.c b/net/mac80211/driver-ops.c
index bb886e7..839c002 100644 (file)
--- a/net/mac80211/driver-ops.c
+++ b/net/mac80211/driver-ops.c
@@ -138,6 +138,27 @@ int drv_sta_state(struct ieee80211_local *local,
        return ret;
 }
 
+__must_check
+int drv_sta_set_txpwr(struct ieee80211_local *local,
+                     struct ieee80211_sub_if_data *sdata,
+                     struct sta_info *sta)
+{
+       int ret = -EOPNOTSUPP;
+
+       might_sleep();
+
+       sdata = get_bss_sdata(sdata);
+       if (!check_sdata_in_driver(sdata))
+               return -EIO;
+
+       trace_drv_sta_set_txpwr(local, sdata, &sta->sta);
+       if (local->ops->sta_set_txpwr)
+               ret = local->ops->sta_set_txpwr(&local->hw, &sdata->vif,
+                                               &sta->sta);
+       trace_drv_return_int(local, ret);
+       return ret;
+}
+
 void drv_sta_rc_update(struct ieee80211_local *local,
                       struct ieee80211_sub_if_data *sdata,
                       struct ieee80211_sta *sta, u32 changed)

diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
index 28d022a..62edfa6 100644 (file)
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -529,6 +529,11 @@ int drv_sta_state(struct ieee80211_local *local,
                  enum ieee80211_sta_state old_state,
                  enum ieee80211_sta_state new_state);
 
+__must_check
+int drv_sta_set_txpwr(struct ieee80211_local *local,
+                     struct ieee80211_sub_if_data *sdata,
+                     struct sta_info *sta);
+
 void drv_sta_rc_update(struct ieee80211_local *local,
                       struct ieee80211_sub_if_data *sdata,
                       struct ieee80211_sta *sta, u32 changed);

diff --git a/net/mac80211/trace.h b/net/mac80211/trace.h
index 8ba70d2..3bb4459 100644 (file)
--- a/net/mac80211/trace.h
+++ b/net/mac80211/trace.h
@@ -828,6 +828,36 @@ TRACE_EVENT(drv_sta_state,
        )
 );
 
+TRACE_EVENT(drv_sta_set_txpwr,
+       TP_PROTO(struct ieee80211_local *local,
+                struct ieee80211_sub_if_data *sdata,
+                struct ieee80211_sta *sta),
+
+       TP_ARGS(local, sdata, sta),
+
+       TP_STRUCT__entry(
+               LOCAL_ENTRY
+               VIF_ENTRY
+               STA_ENTRY
+               __field(s16, txpwr)
+               __field(u8, type)
+       ),
+
+       TP_fast_assign(
+               LOCAL_ASSIGN;
+               VIF_ASSIGN;
+               STA_ASSIGN;
+               __entry->txpwr = sta->txpwr.power;
+               __entry->type = sta->txpwr.type;
+       ),
+
+       TP_printk(
+               LOCAL_PR_FMT  VIF_PR_FMT  STA_PR_FMT " txpwr: %d type %d",
+               LOCAL_PR_ARG, VIF_PR_ARG, STA_PR_ARG,
+               __entry->txpwr,  __entry->type
+       )
+);
+
 TRACE_EVENT(drv_sta_rc_update,
        TP_PROTO(struct ieee80211_local *local,
                 struct ieee80211_sub_if_data *sdata,