iwlwifi: add value and range define for link quality command

Instead of hardcoding the link quality parameters inside the functions,
adding #define in iwl-commands.h to shared by different functions.
Also include the valid range for number of link quality parameters.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-agn-rs.c

@@ -2787,9 +2787,10 @@ static void rs_fill_link_cmd(const struct iwl_priv *priv,
 		repeat_rate--;
 	}
 
-	lq_cmd->agg_params.agg_frame_cnt_limit = 64;
-	lq_cmd->agg_params.agg_dis_start_th = 3;
-	lq_cmd->agg_params.agg_time_limit = cpu_to_le16(4000);
+	lq_cmd->agg_params.agg_frame_cnt_limit = LINK_QUAL_AGG_FRAME_LIMIT_MAX;
+	lq_cmd->agg_params.agg_dis_start_th = LINK_QUAL_AGG_DISABLE_START_DEF;
+	lq_cmd->agg_params.agg_time_limit =
+		cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
 }
 
 static void *rs_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)

drivers/net/wireless/iwlwifi/iwl-commands.h

@@ -1913,6 +1913,18 @@ struct iwl_link_qual_general_params {
 	u8 start_rate_index[LINK_QUAL_AC_NUM];
 } __attribute__ ((packed));
 
+#define LINK_QUAL_AGG_TIME_LIMIT_DEF	(4000) /* 4 milliseconds */
+#define LINK_QUAL_AGG_TIME_LIMIT_MAX	(65535)
+#define LINK_QUAL_AGG_TIME_LIMIT_MIN	(0)
+
+#define LINK_QUAL_AGG_DISABLE_START_DEF	(3)
+#define LINK_QUAL_AGG_DISABLE_START_MAX	(255)
+#define LINK_QUAL_AGG_DISABLE_START_MIN	(0)
+
+#define LINK_QUAL_AGG_FRAME_LIMIT_DEF	(31)
+#define LINK_QUAL_AGG_FRAME_LIMIT_MAX	(64)
+#define LINK_QUAL_AGG_FRAME_LIMIT_MIN	(0)
+
 /**
  * struct iwl_link_qual_agg_params
  *

drivers/net/wireless/iwlwifi/iwl-sta.c

@@ -985,8 +985,9 @@ static void iwl_sta_init_lq(struct iwl_priv *priv, const u8 *addr, bool is_ap)
 	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 = 3;
-	link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
+	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 = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;