iwlwifi: add commit_rxon lib

Patch adds commit_rxon lib operation to iwlwifi and iwl3945 drivers.

Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@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-3945.c

@@ -2008,6 +2008,150 @@ static int iwl3945_send_rxon_assoc(struct iwl_priv *priv)
 	return rc;
 }
 
+/**
+ * iwl3945_commit_rxon - commit staging_rxon to hardware
+ *
+ * The RXON command in staging_rxon is committed to the hardware and
+ * the active_rxon structure is updated with the new data.  This
+ * function correctly transitions out of the RXON_ASSOC_MSK state if
+ * a HW tune is required based on the RXON structure changes.
+ */
+static int iwl3945_commit_rxon(struct iwl_priv *priv)
+{
+	/* cast away the const for active_rxon in this function */
+	struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
+	struct iwl3945_rxon_cmd *staging_rxon = (void *)&priv->staging_rxon;
+	int rc = 0;
+	bool new_assoc =
+		!!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
+
+	if (!iwl_is_alive(priv))
+		return -1;
+
+	/* always get timestamp with Rx frame */
+	staging_rxon->flags |= RXON_FLG_TSF2HOST_MSK;
+
+	/* select antenna */
+	staging_rxon->flags &=
+	    ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
+	staging_rxon->flags |= iwl3945_get_antenna_flags(priv);
+
+	rc = iwl_check_rxon_cmd(priv);
+	if (rc) {
+		IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
+		return -EINVAL;
+	}
+
+	/* If we don't need to send a full RXON, we can use
+	 * iwl3945_rxon_assoc_cmd which is used to reconfigure filter
+	 * and other flags for the current radio configuration. */
+	if (!iwl_full_rxon_required(priv)) {
+		rc = iwl_send_rxon_assoc(priv);
+		if (rc) {
+			IWL_ERR(priv, "Error setting RXON_ASSOC "
+				  "configuration (%d).\n", rc);
+			return rc;
+		}
+
+		memcpy(active_rxon, staging_rxon, sizeof(*active_rxon));
+
+		return 0;
+	}
+
+	/* If we are currently associated and the new config requires
+	 * an RXON_ASSOC and the new config wants the associated mask enabled,
+	 * we must clear the associated from the active configuration
+	 * before we apply the new config */
+	if (iwl_is_associated(priv) && new_assoc) {
+		IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
+		active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
+
+		/*
+		 * reserved4 and 5 could have been filled by the iwlcore code.
+		 * Let's clear them before pushing to the 3945.
+		 */
+		active_rxon->reserved4 = 0;
+		active_rxon->reserved5 = 0;
+		rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
+				      sizeof(struct iwl3945_rxon_cmd),
+				      &priv->active_rxon);
+
+		/* If the mask clearing failed then we set
+		 * active_rxon back to what it was previously */
+		if (rc) {
+			active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
+			IWL_ERR(priv, "Error clearing ASSOC_MSK on current "
+				  "configuration (%d).\n", rc);
+			return rc;
+		}
+	}
+
+	IWL_DEBUG_INFO(priv, "Sending RXON\n"
+		       "* with%s RXON_FILTER_ASSOC_MSK\n"
+		       "* channel = %d\n"
+		       "* bssid = %pM\n",
+		       (new_assoc ? "" : "out"),
+		       le16_to_cpu(staging_rxon->channel),
+		       staging_rxon->bssid_addr);
+
+	/*
+	 * reserved4 and 5 could have been filled by the iwlcore code.
+	 * Let's clear them before pushing to the 3945.
+	 */
+	staging_rxon->reserved4 = 0;
+	staging_rxon->reserved5 = 0;
+
+	iwl_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
+
+	/* Apply the new configuration */
+	rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
+			      sizeof(struct iwl3945_rxon_cmd),
+			      staging_rxon);
+	if (rc) {
+		IWL_ERR(priv, "Error setting new configuration (%d).\n", rc);
+		return rc;
+	}
+
+	memcpy(active_rxon, staging_rxon, sizeof(*active_rxon));
+
+	iwl3945_clear_stations_table(priv);
+
+	/* If we issue a new RXON command which required a tune then we must
+	 * send a new TXPOWER command or we won't be able to Tx any frames */
+	rc = priv->cfg->ops->lib->send_tx_power(priv);
+	if (rc) {
+		IWL_ERR(priv, "Error setting Tx power (%d).\n", rc);
+		return rc;
+	}
+
+	/* Add the broadcast address so we can send broadcast frames */
+	if (iwl3945_add_station(priv, iwl_bcast_addr, 0, 0) ==
+	    IWL_INVALID_STATION) {
+		IWL_ERR(priv, "Error adding BROADCAST address for transmit.\n");
+		return -EIO;
+	}
+
+	/* If we have set the ASSOC_MSK and we are in BSS mode then
+	 * add the IWL_AP_ID to the station rate table */
+	if (iwl_is_associated(priv) &&
+	    (priv->iw_mode == NL80211_IFTYPE_STATION))
+		if (iwl3945_add_station(priv, priv->active_rxon.bssid_addr,
+					1, 0)
+		    == IWL_INVALID_STATION) {
+			IWL_ERR(priv, "Error adding AP address for transmit\n");
+			return -EIO;
+		}
+
+	/* Init the hardware's rate fallback order based on the band */
+	rc = iwl3945_init_hw_rate_table(priv);
+	if (rc) {
+		IWL_ERR(priv, "Error setting HW rate table: %02X\n", rc);
+		return -EIO;
+	}
+
+	return 0;
+}
+
 /* will add 3945 channel switch cmd handling later */
 int iwl3945_hw_channel_switch(struct iwl_priv *priv, u16 channel)
 {
@@ -2775,6 +2919,7 @@ static int iwl3945_load_bsm(struct iwl_priv *priv)
 
 static struct iwl_hcmd_ops iwl3945_hcmd = {
 	.rxon_assoc = iwl3945_send_rxon_assoc,
+	.commit_rxon = iwl3945_commit_rxon,
 };
 
 static struct iwl_lib_ops iwl3945_lib = {

drivers/net/wireless/iwlwifi/iwl-3945.h

@@ -207,6 +207,7 @@ extern int iwl3945_send_add_station(struct iwl_priv *priv,
 				struct iwl3945_addsta_cmd *sta, u8 flags);
 extern u8 iwl3945_add_station(struct iwl_priv *priv, const u8 *bssid,
 			  int is_ap, u8 flags);
+extern void iwl3945_clear_stations_table(struct iwl_priv *priv);
 extern int iwl3945_power_init_handle(struct iwl_priv *priv);
 extern int iwl3945_eeprom_init(struct iwl_priv *priv);
 extern int iwl3945_calc_db_from_ratio(int sig_ratio);

drivers/net/wireless/iwlwifi/iwl-4965.c

@@ -2271,6 +2271,7 @@ static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
 
 static struct iwl_hcmd_ops iwl4965_hcmd = {
 	.rxon_assoc = iwl4965_send_rxon_assoc,
+	.commit_rxon = iwl_commit_rxon,
 };
 
 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {

drivers/net/wireless/iwlwifi/iwl-5000.c

@@ -1474,6 +1474,7 @@ int iwl5000_calc_rssi(struct iwl_priv *priv,
 
 struct iwl_hcmd_ops iwl5000_hcmd = {
 	.rxon_assoc = iwl5000_send_rxon_assoc,
+	.commit_rxon = iwl_commit_rxon,
 };
 
 struct iwl_hcmd_utils_ops iwl5000_hcmd_utils = {

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

@@ -102,7 +102,7 @@ MODULE_ALIAS("iwl4965");
  * function correctly transitions out of the RXON_ASSOC_MSK state if
  * a HW tune is required based on the RXON structure changes.
  */
-static int iwl_commit_rxon(struct iwl_priv *priv)
+int iwl_commit_rxon(struct iwl_priv *priv)
 {
 	/* cast away the const for active_rxon in this function */
 	struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
@@ -247,7 +247,7 @@ void iwl_update_chain_flags(struct iwl_priv *priv)
 {
 
 	iwl_set_rxon_chain(priv);
-	iwl_commit_rxon(priv);
+	iwlcore_commit_rxon(priv);
 }
 
 static void iwl_clear_free_frames(struct iwl_priv *priv)
@@ -606,7 +606,7 @@ static int iwl_set_mode(struct iwl_priv *priv, int mode)
 		return -EAGAIN;
 	}
 
-	iwl_commit_rxon(priv);
+	iwlcore_commit_rxon(priv);
 
 	return 0;
 }
@@ -1000,7 +1000,7 @@ static void iwl_error_recovery(struct iwl_priv *priv)
 	memcpy(&priv->staging_rxon, &priv->recovery_rxon,
 	       sizeof(priv->staging_rxon));
 	priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
-	iwl_commit_rxon(priv);
+	iwlcore_commit_rxon(priv);
 
 	iwl_rxon_add_station(priv, priv->bssid, 1);
 
@@ -1509,7 +1509,7 @@ static void iwl_alive_start(struct iwl_priv *priv)
 	iwl_reset_run_time_calib(priv);
 
 	/* Configure the adapter for unassociated operation */
-	iwl_commit_rxon(priv);
+	iwlcore_commit_rxon(priv);
 
 	/* At this point, the NIC is initialized and operational */
 	iwl_rf_kill_ct_config(priv);
@@ -1865,7 +1865,7 @@ void iwl_post_associate(struct iwl_priv *priv)
 	conf = ieee80211_get_hw_conf(priv->hw);
 
 	priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
-	iwl_commit_rxon(priv);
+	iwlcore_commit_rxon(priv);
 
 	iwl_setup_rxon_timing(priv);
 	ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
@@ -1900,7 +1900,7 @@ void iwl_post_associate(struct iwl_priv *priv)
 
 	}
 
-	iwl_commit_rxon(priv);
+	iwlcore_commit_rxon(priv);
 
 	switch (priv->iw_mode) {
 	case NL80211_IFTYPE_STATION:
@@ -2211,7 +2211,7 @@ static int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
 
 	if (memcmp(&priv->active_rxon,
 		   &priv->staging_rxon, sizeof(priv->staging_rxon)))
-		iwl_commit_rxon(priv);
+		iwlcore_commit_rxon(priv);
 	else
 		IWL_DEBUG_INFO(priv, "No re-sending same RXON configuration.\n");
 
@@ -2235,7 +2235,7 @@ static void iwl_config_ap(struct iwl_priv *priv)
 
 		/* RXON - unassoc (to set timing command) */
 		priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
-		iwl_commit_rxon(priv);
+		iwlcore_commit_rxon(priv);
 
 		/* RXON Timing */
 		iwl_setup_rxon_timing(priv);
@@ -2271,7 +2271,7 @@ static void iwl_config_ap(struct iwl_priv *priv)
 		}
 		/* restore RXON assoc */
 		priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
-		iwl_commit_rxon(priv);
+		iwlcore_commit_rxon(priv);
 		spin_lock_irqsave(&priv->lock, flags);
 		iwl_activate_qos(priv, 1);
 		spin_unlock_irqrestore(&priv->lock, flags);
@@ -2365,7 +2365,7 @@ static int iwl_mac_config_interface(struct ieee80211_hw *hw,
 		if (priv->iw_mode == NL80211_IFTYPE_AP)
 			iwl_config_ap(priv);
 		else {
-			rc = iwl_commit_rxon(priv);
+			rc = iwlcore_commit_rxon(priv);
 			if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
 				iwl_rxon_add_station(
 					priv, priv->active_rxon.bssid_addr, 1);
@@ -2374,7 +2374,7 @@ static int iwl_mac_config_interface(struct ieee80211_hw *hw,
 	} else {
 		iwl_scan_cancel_timeout(priv, 100);
 		priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
-		iwl_commit_rxon(priv);
+		iwlcore_commit_rxon(priv);
 	}
 
  done:
@@ -2396,7 +2396,7 @@ static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
 	if (iwl_is_ready_rf(priv)) {
 		iwl_scan_cancel_timeout(priv, 100);
 		priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
-		iwl_commit_rxon(priv);
+		iwlcore_commit_rxon(priv);
 	}
 	if (priv->vif == conf->vif) {
 		priv->vif = NULL;
@@ -2623,7 +2623,7 @@ static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
 	if (priv->iw_mode != NL80211_IFTYPE_AP) {
 		iwl_scan_cancel_timeout(priv, 100);
 		priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
-		iwl_commit_rxon(priv);
+		iwlcore_commit_rxon(priv);
 	}
 
 	iwl_power_update_mode(priv, 0);
@@ -2803,7 +2803,7 @@ static ssize_t store_flags(struct device *d,
 		else {
 			IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
 			priv->staging_rxon.flags = cpu_to_le32(flags);
-			iwl_commit_rxon(priv);
+			iwlcore_commit_rxon(priv);
 		}
 	}
 	mutex_unlock(&priv->mutex);
@@ -2844,7 +2844,7 @@ static ssize_t store_filter_flags(struct device *d,
 				       "0x%04X\n", filter_flags);
 			priv->staging_rxon.filter_flags =
 				cpu_to_le32(filter_flags);
-			iwl_commit_rxon(priv);
+			iwlcore_commit_rxon(priv);
 		}
 	}
 	mutex_unlock(&priv->mutex);

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

@@ -85,6 +85,7 @@ struct iwl_cmd;
 
 struct iwl_hcmd_ops {
 	int (*rxon_assoc)(struct iwl_priv *priv);
+	int (*commit_rxon)(struct iwl_priv *priv);
 };
 struct iwl_hcmd_utils_ops {
 	u16 (*get_hcmd_size)(u8 cmd_id, u16 len);
@@ -259,6 +260,7 @@ void iwl_bss_info_changed(struct ieee80211_hw *hw,
 				     struct ieee80211_bss_conf *bss_conf,
 				     u32 changes);
 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb);
+int iwl_commit_rxon(struct iwl_priv *priv);
 
 /*****************************************************
  * RX handlers.
@@ -541,6 +543,10 @@ static inline int iwl_send_rxon_assoc(struct iwl_priv *priv)
 {
 	return priv->cfg->ops->hcmd->rxon_assoc(priv);
 }
+static inline int iwlcore_commit_rxon(struct iwl_priv *priv)
+{
+	return priv->cfg->ops->hcmd->commit_rxon(priv);
+}
 
 static inline const struct ieee80211_supported_band *iwl_get_hw_mode(
 			struct iwl_priv *priv, enum ieee80211_band band)