iwlwifi: support channel switch offload in driver

Support channel switch in driver as a separated mac80211 callback
function instead of part of mac_config callback; by moving to this
approach, uCode can have more control of channel switch timing.

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

6 files changed, 257 insertions, 51 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c
index fe7aa73cc0eb..1e4f1bc515db 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.c
@@ -1445,7 +1445,8 @@ static int iwl4965_send_rxon_assoc(struct iwl_priv *priv)
         return ret;
 }
 
-static int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
+static int iwl4965_hw_channel_switch(struct iwl_priv *priv,
+                                     struct ieee80211_channel_switch *ch_switch)
 {
         int rc;
         u8 band = 0;
@@ -1453,11 +1454,14 @@ static int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
         u8 ctrl_chan_high = 0;
         struct iwl4965_channel_switch_cmd cmd;
         const struct iwl_channel_info *ch_info;
-
+        u32 switch_time_in_usec, ucode_switch_time;
+        u16 ch;
+        u32 tsf_low;
+        u8 switch_count;
+        u16 beacon_interval = le16_to_cpu(priv->rxon_timing.beacon_interval);
+        struct ieee80211_vif *vif = priv->vif;
         band = priv->band == IEEE80211_BAND_2GHZ;
 
-        ch_info = iwl_get_channel_info(priv, priv->band, channel);
-
         is_ht40 = is_ht40_channel(priv->staging_rxon.flags);
 
         if (is_ht40 &&
@@ -1466,26 +1470,56 @@ static int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
 
         cmd.band = band;
         cmd.expect_beacon = 0;
-        cmd.channel = cpu_to_le16(channel);
+        ch = ieee80211_frequency_to_channel(ch_switch->channel->center_freq);
+        cmd.channel = cpu_to_le16(ch);
         cmd.rxon_flags = priv->staging_rxon.flags;
         cmd.rxon_filter_flags = priv->staging_rxon.filter_flags;
-        cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
+        switch_count = ch_switch->count;
+        tsf_low = ch_switch->timestamp & 0x0ffffffff;
+        /*
+         * calculate the ucode channel switch time
+         * adding TSF as one of the factor for when to switch
+         */
+        if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) {
+                if (switch_count > ((priv->ucode_beacon_time - tsf_low) /
+                    beacon_interval)) {
+                        switch_count -= (priv->ucode_beacon_time -
+                                tsf_low) / beacon_interval;
+                } else
+                        switch_count = 0;
+        }
+        if (switch_count <= 1)
+                cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
+        else {
+                switch_time_in_usec =
+                        vif->bss_conf.beacon_int * switch_count * TIME_UNIT;
+                ucode_switch_time = iwl_usecs_to_beacons(priv,
+                                                         switch_time_in_usec,
+                                                         beacon_interval);
+                cmd.switch_time = iwl_add_beacon_time(priv,
+                                                      priv->ucode_beacon_time,
+                                                      ucode_switch_time,
+                                                      beacon_interval);
+        }
+        IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n",
+                      cmd.switch_time);
+        ch_info = iwl_get_channel_info(priv, priv->band, ch);
         if (ch_info)
                 cmd.expect_beacon = is_channel_radar(ch_info);
         else {
                 IWL_ERR(priv, "invalid channel switch from %u to %u\n",
-                        priv->active_rxon.channel, channel);
+                        priv->active_rxon.channel, ch);
                 return -EFAULT;
         }
 
-        rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_ht40,
+        rc = iwl4965_fill_txpower_tbl(priv, band, ch, is_ht40,
                                       ctrl_chan_high, &cmd.tx_power);
         if (rc) {
                 IWL_DEBUG_11H(priv, "error:%d  fill txpower_tbl\n", rc);
                 return rc;
         }
 
-        priv->switch_rxon.channel = cpu_to_le16(channel);
+        priv->switch_rxon.channel = cmd.channel;
         priv->switch_rxon.switch_in_progress = true;
 
         return iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
diff --git a/drivers/net/wireless/iwlwifi/iwl-5000.c b/drivers/net/wireless/iwlwifi/iwl-5000.c
index c320d4110fef..19bb5b89b63d 100644
--- a/drivers/net/wireless/iwlwifi/iwl-5000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-5000.c
@@ -271,10 +271,17 @@ static void iwl5150_temperature(struct iwl_priv *priv)
         iwl_tt_handler(priv);
 }
 
-static int iwl5000_hw_channel_switch(struct iwl_priv *priv, u16 channel)
+static int iwl5000_hw_channel_switch(struct iwl_priv *priv,
+                                     struct ieee80211_channel_switch *ch_switch)
 {
         struct iwl5000_channel_switch_cmd cmd;
         const struct iwl_channel_info *ch_info;
+        u32 switch_time_in_usec, ucode_switch_time;
+        u16 ch;
+        u32 tsf_low;
+        u8 switch_count;
+        u16 beacon_interval = le16_to_cpu(priv->rxon_timing.beacon_interval);
+        struct ieee80211_vif *vif = priv->vif;
         struct iwl_host_cmd hcmd = {
                 .id = REPLY_CHANNEL_SWITCH,
                 .len = sizeof(cmd),
@@ -282,22 +289,51 @@ static int iwl5000_hw_channel_switch(struct iwl_priv *priv, u16 channel)
                 .data = &cmd,
         };
 
-        IWL_DEBUG_11H(priv, "channel switch from %d to %d\n",
-                priv->active_rxon.channel, channel);
         cmd.band = priv->band == IEEE80211_BAND_2GHZ;
-        cmd.channel = cpu_to_le16(channel);
+        ch = ieee80211_frequency_to_channel(ch_switch->channel->center_freq);
+        IWL_DEBUG_11H(priv, "channel switch from %d to %d\n",
+                priv->active_rxon.channel, ch);
+        cmd.channel = cpu_to_le16(ch);
         cmd.rxon_flags = priv->staging_rxon.flags;
         cmd.rxon_filter_flags = priv->staging_rxon.filter_flags;
-        cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
-        ch_info = iwl_get_channel_info(priv, priv->band, channel);
+        switch_count = ch_switch->count;
+        tsf_low = ch_switch->timestamp & 0x0ffffffff;
+        /*
+         * calculate the ucode channel switch time
+         * adding TSF as one of the factor for when to switch
+         */
+        if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) {
+                if (switch_count > ((priv->ucode_beacon_time - tsf_low) /
+                    beacon_interval)) {
+                        switch_count -= (priv->ucode_beacon_time -
+                                tsf_low) / beacon_interval;
+                } else
+                        switch_count = 0;
+        }
+        if (switch_count <= 1)
+                cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
+        else {
+                switch_time_in_usec =
+                        vif->bss_conf.beacon_int * switch_count * TIME_UNIT;
+                ucode_switch_time = iwl_usecs_to_beacons(priv,
+                                                         switch_time_in_usec,
+                                                         beacon_interval);
+                cmd.switch_time = iwl_add_beacon_time(priv,
+                                                      priv->ucode_beacon_time,
+                                                      ucode_switch_time,
+                                                      beacon_interval);
+        }
+        IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n",
+                      cmd.switch_time);
+        ch_info = iwl_get_channel_info(priv, priv->band, ch);
         if (ch_info)
                 cmd.expect_beacon = is_channel_radar(ch_info);
         else {
                 IWL_ERR(priv, "invalid channel switch from %u to %u\n",
-                        priv->active_rxon.channel, channel);
+                        priv->active_rxon.channel, ch);
                 return -EFAULT;
         }
-        priv->switch_rxon.channel = cpu_to_le16(channel);
+        priv->switch_rxon.channel = cmd.channel;
         priv->switch_rxon.switch_in_progress = true;
 
         return iwl_send_cmd_sync(priv, &hcmd);
diff --git a/drivers/net/wireless/iwlwifi/iwl-6000.c b/drivers/net/wireless/iwlwifi/iwl-6000.c
index 5f6dbd9561d7..077514546d02 100644
--- a/drivers/net/wireless/iwlwifi/iwl-6000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-6000.c
@@ -239,10 +239,17 @@ static int iwl6050_hw_set_hw_params(struct iwl_priv *priv)
         return 0;
 }
 
-static int iwl6000_hw_channel_switch(struct iwl_priv *priv, u16 channel)
+static int iwl6000_hw_channel_switch(struct iwl_priv *priv,
+                                     struct ieee80211_channel_switch *ch_switch)
 {
         struct iwl6000_channel_switch_cmd cmd;
         const struct iwl_channel_info *ch_info;
+        u32 switch_time_in_usec, ucode_switch_time;
+        u16 ch;
+        u32 tsf_low;
+        u8 switch_count;
+        u16 beacon_interval = le16_to_cpu(priv->rxon_timing.beacon_interval);
+        struct ieee80211_vif *vif = priv->vif;
         struct iwl_host_cmd hcmd = {
                 .id = REPLY_CHANNEL_SWITCH,
                 .len = sizeof(cmd),
@@ -250,23 +257,51 @@ static int iwl6000_hw_channel_switch(struct iwl_priv *priv, u16 channel)
                 .data = &cmd,
         };
 
-        IWL_DEBUG_11H(priv, "channel switch from %d to %d\n",
-                priv->active_rxon.channel, channel);
-
         cmd.band = priv->band == IEEE80211_BAND_2GHZ;
-        cmd.channel = cpu_to_le16(channel);
+        ch = ieee80211_frequency_to_channel(ch_switch->channel->center_freq);
+        IWL_DEBUG_11H(priv, "channel switch from %u to %u\n",
+                      priv->active_rxon.channel, ch);
+        cmd.channel = cpu_to_le16(ch);
         cmd.rxon_flags = priv->staging_rxon.flags;
         cmd.rxon_filter_flags = priv->staging_rxon.filter_flags;
-        cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
-        ch_info = iwl_get_channel_info(priv, priv->band, channel);
+        switch_count = ch_switch->count;
+        tsf_low = ch_switch->timestamp & 0x0ffffffff;
+        /*
+         * calculate the ucode channel switch time
+         * adding TSF as one of the factor for when to switch
+         */
+        if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) {
+                if (switch_count > ((priv->ucode_beacon_time - tsf_low) /
+                    beacon_interval)) {
+                        switch_count -= (priv->ucode_beacon_time -
+                                tsf_low) / beacon_interval;
+                } else
+                        switch_count = 0;
+        }
+        if (switch_count <= 1)
+                cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
+        else {
+                switch_time_in_usec =
+                        vif->bss_conf.beacon_int * switch_count * TIME_UNIT;
+                ucode_switch_time = iwl_usecs_to_beacons(priv,
+                                                         switch_time_in_usec,
+                                                         beacon_interval);
+                cmd.switch_time = iwl_add_beacon_time(priv,
+                                                      priv->ucode_beacon_time,
+                                                      ucode_switch_time,
+                                                      beacon_interval);
+        }
+        IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n",
+                      cmd.switch_time);
+        ch_info = iwl_get_channel_info(priv, priv->band, ch);
         if (ch_info)
                 cmd.expect_beacon = is_channel_radar(ch_info);
         else {
                 IWL_ERR(priv, "invalid channel switch from %u to %u\n",
-                        priv->active_rxon.channel, channel);
+                        priv->active_rxon.channel, ch);
                 return -EFAULT;
         }
-        priv->switch_rxon.channel = cpu_to_le16(channel);
+        priv->switch_rxon.channel = cmd.channel;
         priv->switch_rxon.switch_in_progress = true;
 
         return iwl_send_cmd_sync(priv, &hcmd);
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index 021b01494a2a..9c85e1bd2971 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -120,7 +120,7 @@ int iwl_commit_rxon(struct iwl_priv *priv)
             (priv->switch_rxon.channel != priv->staging_rxon.channel)) {
                 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
                       le16_to_cpu(priv->switch_rxon.channel));
-                priv->switch_rxon.switch_in_progress = false;
+                iwl_chswitch_done(priv, false);
         }
 
         /* If we don't need to send a full RXON, we can use
@@ -3325,6 +3325,98 @@ static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
         return 0;
 }
 
+static void iwl_mac_channel_switch(struct ieee80211_hw *hw,
+                                   struct ieee80211_channel_switch *ch_switch)
+{
+        struct iwl_priv *priv = hw->priv;
+        const struct iwl_channel_info *ch_info;
+        struct ieee80211_conf *conf = &hw->conf;
+        struct iwl_ht_config *ht_conf = &priv->current_ht_config;
+        u16 ch;
+        unsigned long flags = 0;
+
+        IWL_DEBUG_MAC80211(priv, "enter\n");
+
+        if (iwl_is_rfkill(priv))
+                goto out_exit;
+
+        if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
+            test_bit(STATUS_SCANNING, &priv->status))
+                goto out_exit;
+
+        if (!iwl_is_associated(priv))
+                goto out_exit;
+
+        /* channel switch in progress */
+        if (priv->switch_rxon.switch_in_progress == true)
+                goto out_exit;
+
+        mutex_lock(&priv->mutex);
+        if (priv->cfg->ops->lib->set_channel_switch) {
+
+                ch = ieee80211_frequency_to_channel(
+                        ch_switch->channel->center_freq);
+                if (le16_to_cpu(priv->active_rxon.channel) != ch) {
+                        ch_info = iwl_get_channel_info(priv,
+                                                       conf->channel->band,
+                                                       ch);
+                        if (!is_channel_valid(ch_info)) {
+                                IWL_DEBUG_MAC80211(priv, "invalid channel\n");
+                                goto out;
+                        }
+                        spin_lock_irqsave(&priv->lock, flags);
+
+                        priv->current_ht_config.smps = conf->smps_mode;
+
+                        /* Configure HT40 channels */
+                        ht_conf->is_ht = conf_is_ht(conf);
+                        if (ht_conf->is_ht) {
+                                if (conf_is_ht40_minus(conf)) {
+                                        ht_conf->extension_chan_offset =
+                                                IEEE80211_HT_PARAM_CHA_SEC_BELOW;
+                                        ht_conf->is_40mhz = true;
+                                } else if (conf_is_ht40_plus(conf)) {
+                                        ht_conf->extension_chan_offset =
+                                                IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
+                                        ht_conf->is_40mhz = true;
+                                } else {
+                                        ht_conf->extension_chan_offset =
+                                                IEEE80211_HT_PARAM_CHA_SEC_NONE;
+                                        ht_conf->is_40mhz = false;
+                                }
+                        } else
+                                ht_conf->is_40mhz = false;
+
+                        /* if we are switching from ht to 2.4 clear flags
+                         * from any ht related info since 2.4 does not
+                         * support ht */
+                        if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
+                                priv->staging_rxon.flags = 0;
+
+                        iwl_set_rxon_channel(priv, conf->channel);
+                        iwl_set_rxon_ht(priv, ht_conf);
+                        iwl_set_flags_for_band(priv, conf->channel->band,
+                                               priv->vif);
+                        spin_unlock_irqrestore(&priv->lock, flags);
+
+                        iwl_set_rate(priv);
+                        /*
+                         * at this point, staging_rxon has the
+                         * configuration for channel switch
+                         */
+                        if (priv->cfg->ops->lib->set_channel_switch(priv,
+                                                                    ch_switch))
+                                priv->switch_rxon.switch_in_progress = false;
+                }
+        }
+out:
+        mutex_unlock(&priv->mutex);
+out_exit:
+        if (!priv->switch_rxon.switch_in_progress)
+                ieee80211_chswitch_done(priv->vif, false);
+        IWL_DEBUG_MAC80211(priv, "leave\n");
+}
+
 /*****************************************************************************
  *
  * sysfs attributes
@@ -3646,6 +3738,7 @@ static struct ieee80211_ops iwl_hw_ops = {
         .sta_notify = iwl_mac_sta_notify,
         .sta_add = iwlagn_mac_sta_add,
         .sta_remove = iwl_mac_sta_remove,
+        .channel_switch = iwl_mac_channel_switch,
 };
 
 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c
index b05b813413fd..718ffa3d89c1 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.c
+++ b/drivers/net/wireless/iwlwifi/iwl-core.c
@@ -893,9 +893,9 @@ int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
 }
 EXPORT_SYMBOL(iwl_set_rxon_channel);
 
-static void iwl_set_flags_for_band(struct iwl_priv *priv,
-                                   enum ieee80211_band band,
-                                   struct ieee80211_vif *vif)
+void iwl_set_flags_for_band(struct iwl_priv *priv,
+                            enum ieee80211_band band,
+                            struct ieee80211_vif *vif)
 {
         if (band == IEEE80211_BAND_5GHZ) {
                 priv->staging_rxon.flags &=
@@ -914,6 +914,7 @@ static void iwl_set_flags_for_band(struct iwl_priv *priv,
                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
         }
 }
+EXPORT_SYMBOL(iwl_set_flags_for_band);
 
 /*
  * initialize rxon structure with default values from eeprom
@@ -989,7 +990,7 @@ void iwl_connection_init_rx_config(struct iwl_priv *priv,
 }
 EXPORT_SYMBOL(iwl_connection_init_rx_config);
 
-static void iwl_set_rate(struct iwl_priv *priv)
+void iwl_set_rate(struct iwl_priv *priv)
 {
         const struct ieee80211_supported_band *hw = NULL;
         struct ieee80211_rate *rate;
@@ -1017,6 +1018,21 @@ static void iwl_set_rate(struct iwl_priv *priv)
         priv->staging_rxon.ofdm_basic_rates =
            (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
 }
+EXPORT_SYMBOL(iwl_set_rate);
+
+void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
+{
+        if (test_bit(STATUS_EXIT_PENDING, &priv->status))
+                return;
+
+        if (priv->switch_rxon.switch_in_progress) {
+                ieee80211_chswitch_done(priv->vif, is_success);
+                mutex_lock(&priv->mutex);
+                priv->switch_rxon.switch_in_progress = false;
+                mutex_unlock(&priv->mutex);
+        }
+}
+EXPORT_SYMBOL(iwl_chswitch_done);
 
 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
 {
@@ -1031,11 +1047,12 @@ void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
                         priv->staging_rxon.channel = csa->channel;
                         IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
                               le16_to_cpu(csa->channel));
-                } else
+                        iwl_chswitch_done(priv, true);
+                } else {
                         IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
                               le16_to_cpu(csa->channel));
-
-                priv->switch_rxon.switch_in_progress = false;
+                        iwl_chswitch_done(priv, false);
+                }
         }
 }
 EXPORT_SYMBOL(iwl_rx_csa);
@@ -2044,22 +2061,7 @@ int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
 
                 iwl_set_flags_for_band(priv, conf->channel->band, priv->vif);
                 spin_unlock_irqrestore(&priv->lock, flags);
-                if (iwl_is_associated(priv) &&
-                    (le16_to_cpu(priv->active_rxon.channel) != ch) &&
-                    priv->cfg->ops->lib->set_channel_switch) {
-                        iwl_set_rate(priv);
-                        /*
-                         * at this point, staging_rxon has the
-                         * configuration for channel switch
-                         */
-                        ret = priv->cfg->ops->lib->set_channel_switch(priv,
-                                ch);
-                        if (!ret) {
-                                iwl_print_rx_config_cmd(priv);
-                                goto out;
-                        }
-                        priv->switch_rxon.switch_in_progress = false;
-                }
+
  set_ch_out:
                 /* The list of supported rates and rate mask can be different
                  * for each band; since the band may have changed, reset
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h
index 48d96fda431c..9fe08ecdc14b 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.h
+++ b/drivers/net/wireless/iwlwifi/iwl-core.h
@@ -175,7 +175,8 @@ struct iwl_lib_ops {
         void (*dump_nic_error_log)(struct iwl_priv *priv);
         void (*dump_csr)(struct iwl_priv *priv);
         int (*dump_fh)(struct iwl_priv *priv, char **buf, bool display);
-        int (*set_channel_switch)(struct iwl_priv *priv, u16 channel);
+        int (*set_channel_switch)(struct iwl_priv *priv,
+                                  struct ieee80211_channel_switch *ch_switch);
         /* power management */
         struct iwl_apm_ops apm_ops;
 
@@ -345,11 +346,15 @@ int iwl_check_rxon_cmd(struct iwl_priv *priv);
 int iwl_full_rxon_required(struct iwl_priv *priv);
 void iwl_set_rxon_chain(struct iwl_priv *priv);
 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch);
+void iwl_set_flags_for_band(struct iwl_priv *priv,
+                            enum ieee80211_band band,
+                            struct ieee80211_vif *vif);
 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf);
 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
                          struct ieee80211_sta_ht_cap *sta_ht_inf);
 void iwl_connection_init_rx_config(struct iwl_priv *priv,
                                    struct ieee80211_vif *vif);
+void iwl_set_rate(struct iwl_priv *priv);
 int iwl_set_decrypted_flag(struct iwl_priv *priv,
                            struct ieee80211_hdr *hdr,
                            u32 decrypt_res,
@@ -461,6 +466,7 @@ void iwl_rx_statistics(struct iwl_priv *priv,
                               struct iwl_rx_mem_buffer *rxb);
 void iwl_reply_statistics(struct iwl_priv *priv,
                           struct iwl_rx_mem_buffer *rxb);
+void iwl_chswitch_done(struct iwl_priv *priv, bool is_success);
 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb);
 
 /* TX helpers */