iwlwifi: introduce beacon context

Only one context can be beaconing at a time,
but we need to track which one. Introduce a
new variable priv->beacon_ctx to do that.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index 4efca99..55d1cd4 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -345,6 +345,13 @@ static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
         * beacon contents.
         */
 
+       lockdep_assert_held(&priv->mutex);
+
+       if (!priv->beacon_ctx) {
+               IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
+               return -EINVAL;
+       }
+
        /* Initialize memory */
        tx_beacon_cmd = &frame->u.beacon;
        memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
@@ -357,9 +364,7 @@ static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
 
        /* Set up TX command fields */
        tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
-#warning "Use proper STA ID"
-       tx_beacon_cmd->tx.sta_id =
-               priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id;
+       tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
        tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
        tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
                TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
@@ -369,7 +374,7 @@ static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
                        frame_size);
 
        /* Set up packet rate and flags */
-       rate = iwl_rate_get_lowest_plcp(priv);
+       rate = iwl_rate_get_lowest_plcp(priv, priv->beacon_ctx);
        priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
                                              priv->hw_params.valid_tx_ant);
        rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
@@ -602,25 +607,28 @@ static void iwl_bg_beacon_update(struct work_struct *work)
                container_of(work, struct iwl_priv, beacon_update);
        struct sk_buff *beacon;
 
-       /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
-#warning "introduce and use beacon context"
-       beacon = ieee80211_beacon_get(priv->hw,
-                       priv->contexts[IWL_RXON_CTX_BSS].vif);
+       mutex_lock(&priv->mutex);
+       if (!priv->beacon_ctx) {
+               IWL_ERR(priv, "updating beacon w/o beacon context!\n");
+               goto out;
+       }
 
+       /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
+       beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
        if (!beacon) {
                IWL_ERR(priv, "update beacon failed\n");
-               return;
+               goto out;
        }
 
-       mutex_lock(&priv->mutex);
        /* new beacon skb is allocated every time; dispose previous.*/
        if (priv->ibss_beacon)
                dev_kfree_skb(priv->ibss_beacon);
 
        priv->ibss_beacon = beacon;
-       mutex_unlock(&priv->mutex);
 
        iwl_send_beacon_cmd(priv);
+ out:
+       mutex_unlock(&priv->mutex);
 }
 
 static void iwl_bg_bt_runtime_config(struct work_struct *work)
@@ -3477,6 +3485,8 @@ void iwl_config_ap(struct iwl_priv *priv, struct ieee80211_vif *vif)
        struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
        int ret = 0;
 
+       lockdep_assert_held(&priv->mutex);
+
        if (test_bit(STATUS_EXIT_PENDING, &priv->status))
                return;
 

diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c
index 8ec042d..fb9173b 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-core.c
+++ b/drivers/net/wireless/iwlwifi/iwl-core.c
@@ -699,11 +699,9 @@ int iwl_full_rxon_required(struct iwl_priv *priv,
 }
 EXPORT_SYMBOL(iwl_full_rxon_required);
 
-u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
+u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv,
+                           struct iwl_rxon_context *ctx)
 {
-#if !TODO
-       struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
-#endif
        /*
         * Assign the lowest rate -- should really get this from
         * the beacon skb from mac80211.
@@ -1723,6 +1721,14 @@ static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
 
        IWL_DEBUG_MAC80211(priv, "enter\n");
 
+       lockdep_assert_held(&priv->mutex);
+
+       if (!priv->beacon_ctx) {
+               IWL_ERR(priv, "update beacon but no beacon context!\n");
+               dev_kfree_skb(skb);
+               return -EINVAL;
+       }
+
        if (!iwl_is_ready_rf(priv)) {
                IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
                return -EIO;
@@ -1741,9 +1747,7 @@ static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
        IWL_DEBUG_MAC80211(priv, "leave\n");
        spin_unlock_irqrestore(&priv->lock, flags);
 
-#warning "use beacon context?"
-       priv->cfg->ops->lib->post_associate(
-                       priv, priv->contexts[IWL_RXON_CTX_BSS].vif);
+       priv->cfg->ops->lib->post_associate(priv, priv->beacon_ctx->vif);
 
        return 0;
 }
@@ -1773,6 +1777,18 @@ void iwl_bss_info_changed(struct ieee80211_hw *hw,
                spin_unlock_irqrestore(&priv->lock, flags);
        }
 
+       if (changes & BSS_CHANGED_BEACON_ENABLED) {
+               /*
+                * the add_interface code must make sure we only ever
+                * have a single interface that could be beaconing at
+                * any time.
+                */
+               if (vif->bss_conf.enable_beacon)
+                       priv->beacon_ctx = ctx;
+               else
+                       priv->beacon_ctx = NULL;
+       }
+
        if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_AP) {
                dev_kfree_skb(priv->ibss_beacon);
                priv->ibss_beacon = ieee80211_beacon_get(hw, vif);

diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h
index 289fef8..d2ee55d 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-core.h
+++ b/drivers/net/wireless/iwlwifi/iwl-core.h
@@ -523,7 +523,8 @@ int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force);
 
 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags);
 
-u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv);
+u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv,
+                           struct iwl_rxon_context *ctx);
 
 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant_idx, u8 valid);
 

diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index c17c67f..e1565f7 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -1437,6 +1437,8 @@ struct iwl_priv {
        struct work_struct rx_replenish;
        struct work_struct abort_scan;
        struct work_struct beacon_update;
+       struct iwl_rxon_context *beacon_ctx;
+
        struct work_struct tt_work;
        struct work_struct ct_enter;
        struct work_struct ct_exit;

diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index c048c1d..e81c438 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -343,7 +343,8 @@ static int iwl3945_send_beacon_cmd(struct iwl_priv *priv)
                return -ENOMEM;
        }
 
-       rate = iwl_rate_get_lowest_plcp(priv);
+       rate = iwl_rate_get_lowest_plcp(priv,
+                               &priv->contexts[IWL_RXON_CTX_BSS]);
 
        frame_size = iwl3945_hw_get_beacon_cmd(priv, frame, rate);