iwlwifi: split adding broadcast station from others

In preparation for some station management changes we split the addition of
a broadcast station from the other stations. Later we will rely on mac80211
to direct all management (addition/removal) of all stations except the
broadcast station.

Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 65 insertions, 6 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index 2814565fa3b4..4a13f7e21d63 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -190,11 +190,7 @@ int iwl_commit_rxon(struct iwl_priv *priv)
         priv->start_calib = 0;
 
         /* Add the broadcast address so we can send broadcast frames */
-        if (iwl_rxon_add_station(priv, iwl_bcast_addr, 0) ==
-                                                IWL_INVALID_STATION) {
-                IWL_ERR(priv, "Error adding BROADCAST address for transmit.\n");
-                return -EIO;
-        }
+        iwl_add_bcast_station(priv);
 
         /* If we have set the ASSOC_MSK and we are in BSS mode then
          * add the IWL_AP_ID to the station rate table */
@@ -2524,7 +2520,7 @@ void iwl_config_ap(struct iwl_priv *priv)
                 spin_lock_irqsave(&priv->lock, flags);
                 iwl_activate_qos(priv, 1);
                 spin_unlock_irqrestore(&priv->lock, flags);
-                iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
+                iwl_add_bcast_station(priv);
         }
         iwl_send_beacon_cmd(priv);
 
diff --git a/drivers/net/wireless/iwlwifi/iwl-sta.c b/drivers/net/wireless/iwlwifi/iwl-sta.c
index dc74c16d36a8..ce1ceac19c7d 100644
--- a/drivers/net/wireless/iwlwifi/iwl-sta.c
+++ b/drivers/net/wireless/iwlwifi/iwl-sta.c
@@ -1030,6 +1030,68 @@ int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap)
 EXPORT_SYMBOL(iwl_rxon_add_station);
 
 /**
+ * iwl_sta_init_bcast_lq - Initialize a bcast station's hardware rate table
+ *
+ * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
+ *       calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
+ *       which requires station table entry to exist).
+ */
+static void iwl_sta_init_bcast_lq(struct iwl_priv *priv)
+{
+        int i, r;
+        struct iwl_link_quality_cmd link_cmd = {
+                .reserved1 = 0,
+        };
+        u32 rate_flags;
+
+        /* Set up the rate scaling to start at selected rate, fall back
+         * all the way down to 1M in IEEE order, and then spin on 1M */
+        if (priv->band == IEEE80211_BAND_5GHZ)
+                r = IWL_RATE_6M_INDEX;
+        else
+                r = IWL_RATE_1M_INDEX;
+
+        for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
+                rate_flags = 0;
+                if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
+                        rate_flags |= RATE_MCS_CCK_MSK;
+
+                rate_flags |= first_antenna(priv->hw_params.valid_tx_ant) <<
+                                RATE_MCS_ANT_POS;
+
+                link_cmd.rs_table[i].rate_n_flags =
+                        iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
+                r = iwl_get_prev_ieee_rate(r);
+        }
+
+        link_cmd.general_params.single_stream_ant_msk =
+                                first_antenna(priv->hw_params.valid_tx_ant);
+        link_cmd.general_params.dual_stream_ant_msk = 3;
+        link_cmd.agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
+        link_cmd.agg_params.agg_time_limit =
+                cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
+
+        /* Update the rate scaling for control frame Tx to AP */
+        link_cmd.sta_id = priv->hw_params.bcast_sta_id;
+
+        iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
+                               sizeof(link_cmd), &link_cmd, NULL);
+}
+
+
+/**
+ * iwl_add_bcast_station - add broadcast station into station table.
+ */
+void iwl_add_bcast_station(struct iwl_priv *priv)
+{
+        iwl_add_station(priv, iwl_bcast_addr, false, CMD_SYNC, NULL);
+
+        /* Set up default rate scaling table in device's station table */
+        iwl_sta_init_bcast_lq(priv);
+}
+EXPORT_SYMBOL(iwl_add_bcast_station);
+
+/**
  * iwl_get_sta_id - Find station's index within station table
  *
  * If new IBSS station, create new entry in station table
diff --git a/drivers/net/wireless/iwlwifi/iwl-sta.h b/drivers/net/wireless/iwlwifi/iwl-sta.h
index 6deebade6361..1c382de80d49 100644
--- a/drivers/net/wireless/iwlwifi/iwl-sta.h
+++ b/drivers/net/wireless/iwlwifi/iwl-sta.h
@@ -52,6 +52,7 @@ void iwl_update_tkip_key(struct iwl_priv *priv,
                         const u8 *addr, u32 iv32, u16 *phase1key);
 
 int iwl_rxon_add_station(struct iwl_priv *priv, const u8 *addr, bool is_ap);
+void iwl_add_bcast_station(struct iwl_priv *priv);
 int iwl_remove_station(struct iwl_priv *priv, const u8 *addr, bool is_ap);
 void iwl_clear_stations_table(struct iwl_priv *priv);
 int iwl_get_free_ucode_key_index(struct iwl_priv *priv);