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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29 #ifndef __iwl_sta_h__
  30 #define __iwl_sta_h__
  31
  32 #include "iwl-dev.h"
  33
  34 #define HW_KEY_DYNAMIC 0
  35 #define HW_KEY_DEFAULT 1
  36
  37 #define IWL_STA_DRIVER_ACTIVE BIT(0) /* driver entry is active */
  38 #define IWL_STA_UCODE_ACTIVE  BIT(1) /* ucode entry is active */
  39 #define IWL_STA_UCODE_INPROGRESS  BIT(2) /* ucode entry is in process of
  40                                             being activated */
  41 #define IWL_STA_LOCAL BIT(3) /* station state not directed by mac80211;
  42                                 (this is for the IBSS BSSID stations) */
  43 #define IWL_STA_BCAST BIT(4) /* this station is the special bcast station */
  44
  45
  46 int iwl_remove_default_wep_key(struct iwl_priv *priv,
  47                                struct iwl_rxon_context *ctx,
  48                                struct ieee80211_key_conf *key);
  49 int iwl_set_default_wep_key(struct iwl_priv *priv,
  50                             struct iwl_rxon_context *ctx,
  51                             struct ieee80211_key_conf *key);
  52 int iwl_restore_default_wep_keys(struct iwl_priv *priv,
  53                                  struct iwl_rxon_context *ctx);
  54 int iwl_set_dynamic_key(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
  55                         struct ieee80211_key_conf *key, u8 sta_id);
  56 int iwl_remove_dynamic_key(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
  57                            struct ieee80211_key_conf *key, u8 sta_id);
  58 void iwl_update_tkip_key(struct iwl_priv *priv,
  59                          struct iwl_rxon_context *ctx,
  60                          struct ieee80211_key_conf *keyconf,
  61                          struct ieee80211_sta *sta, u32 iv32, u16 *phase1key);
  62
  63 void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx);
  64 void iwl_clear_ucode_stations(struct iwl_priv *priv,
  65                               struct iwl_rxon_context *ctx);
  66 int iwl_alloc_bcast_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
  67                             bool init_lq);
  68 void iwl_dealloc_bcast_stations(struct iwl_priv *priv);
  69 int iwl_update_bcast_stations(struct iwl_priv *priv);
  70 int iwl_get_free_ucode_key_index(struct iwl_priv *priv);
  71 int iwl_send_add_sta(struct iwl_priv *priv,
  72                      struct iwl_addsta_cmd *sta, u8 flags);
  73 int iwl_add_bssid_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
  74                           const u8 *addr, bool init_rs, u8 *sta_id_r);
  75 int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
  76                            const u8 *addr, bool is_ap,
  77                            struct ieee80211_sta *sta, u8 *sta_id_r);
  78 int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
  79                        const u8 *addr);
  80 int iwl_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
  81                        struct ieee80211_sta *sta);
  82 int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid);
  83 int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
  84                          int tid, u16 ssn);
  85 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
  86                         int tid);
  87 void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id);
  88 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt);
  89
  90 /**
  91  * iwl_clear_driver_stations - clear knowledge of all stations from driver
  92  * @priv: iwl priv struct
  93  *
  94  * This is called during iwl_down() to make sure that in the case
  95  * we're coming there from a hardware restart mac80211 will be
  96  * able to reconfigure stations -- if we're getting there in the
  97  * normal down flow then the stations will already be cleared.
  98  */
  99 static inline void iwl_clear_driver_stations(struct iwl_priv *priv)
 100 {
 101         unsigned long flags;
 102         struct iwl_rxon_context *ctx;
 103
 104         spin_lock_irqsave(&priv->sta_lock, flags);
 105         memset(priv->stations, 0, sizeof(priv->stations));
 106         priv->num_stations = 0;
 107
 108         priv->ucode_key_table = 0;
 109
 110         for_each_context(priv, ctx) {
 111                 /*
 112                  * Remove all key information that is not stored as part
 113                  * of station information since mac80211 may not have had
 114                  * a chance to remove all the keys. When device is
 115                  * reconfigured by mac80211 after an error all keys will
 116                  * be reconfigured.
 117                  */
 118                 memset(ctx->wep_keys, 0, sizeof(ctx->wep_keys));
 119                 ctx->key_mapping_keys = 0;
 120         }
 121
 122         spin_unlock_irqrestore(&priv->sta_lock, flags);
 123 }
 124
 125 static inline int iwl_sta_id(struct ieee80211_sta *sta)
 126 {
 127         if (WARN_ON(!sta))
 128                 return IWL_INVALID_STATION;
 129
 130         return ((struct iwl_station_priv_common *)sta->drv_priv)->sta_id;
 131 }
 132
 133 /**
 134  * iwl_sta_id_or_broadcast - return sta_id or broadcast sta
 135  * @priv: iwl priv
 136  * @context: the current context
 137  * @sta: mac80211 station
 138  *
 139  * In certain circumstances mac80211 passes a station pointer
 140  * that may be %NULL, for example during TX or key setup. In
 141  * that case, we need to use the broadcast station, so this
 142  * inline wraps that pattern.
 143  */
 144 static inline int iwl_sta_id_or_broadcast(struct iwl_priv *priv,
 145                                           struct iwl_rxon_context *context,
 146                                           struct ieee80211_sta *sta)
 147 {
 148         int sta_id;
 149
 150         if (!sta)
 151                 return context->bcast_sta_id;
 152
 153         sta_id = iwl_sta_id(sta);
 154
 155         /*
 156          * mac80211 should not be passing a partially
 157          * initialised station!
 158          */
 159         WARN_ON(sta_id == IWL_INVALID_STATION);
 160
 161         return sta_id;
 162 }
 163 #endif /* __iwl_sta_h__ */