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>
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index 021b0149..9c85e1b 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -120,7 +120,7 @@
(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 @@
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 @@
.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)