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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2011 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 __il_sta_h__
  30 #define __il_sta_h__
  31
  32 #include "iwl-dev.h"
  33
  34 #define HW_KEY_DYNAMIC 0
  35 #define HW_KEY_DEFAULT 1
  36
  37 #define IL_STA_DRIVER_ACTIVE BIT(0) /* driver entry is active */
  38 #define IL_STA_UCODE_ACTIVE  BIT(1) /* ucode entry is active */
  39 #define IL_STA_UCODE_INPROGRESS  BIT(2) /* ucode entry is in process of
  40                                             being activated */
  41 #define IL_STA_LOCAL BIT(3) /* station state not directed by mac80211;
  42                                 (this is for the IBSS BSSID stations) */
  43 #define IL_STA_BCAST BIT(4) /* this station is the special bcast station */
  44
  45
  46 void il_restore_stations(struct il_priv *il,
  47                                 struct il_rxon_context *ctx);
  48 void il_clear_ucode_stations(struct il_priv *il,
  49                               struct il_rxon_context *ctx);
  50 void il_dealloc_bcast_stations(struct il_priv *il);
  51 int il_get_free_ucode_key_index(struct il_priv *il);
  52 int il_send_add_sta(struct il_priv *il,
  53                         struct il_addsta_cmd *sta, u8 flags);
  54 int il_add_station_common(struct il_priv *il,
  55                         struct il_rxon_context *ctx,
  56                         const u8 *addr, bool is_ap,
  57                         struct ieee80211_sta *sta, u8 *sta_id_r);
  58 int il_remove_station(struct il_priv *il,
  59                         const u8 sta_id,
  60                         const u8 *addr);
  61 int il_mac_sta_remove(struct ieee80211_hw *hw,
  62                         struct ieee80211_vif *vif,
  63                         struct ieee80211_sta *sta);
  64
  65 u8 il_prep_station(struct il_priv *il,
  66                         struct il_rxon_context *ctx,
  67                         const u8 *addr, bool is_ap,
  68                         struct ieee80211_sta *sta);
  69
  70 int il_send_lq_cmd(struct il_priv *il,
  71                         struct il_rxon_context *ctx,
  72                         struct il_link_quality_cmd *lq,
  73                         u8 flags, bool init);
  74
  75 /**
  76  * il_clear_driver_stations - clear knowledge of all stations from driver
  77  * @il: iwl il struct
  78  *
  79  * This is called during il_down() to make sure that in the case
  80  * we're coming there from a hardware restart mac80211 will be
  81  * able to reconfigure stations -- if we're getting there in the
  82  * normal down flow then the stations will already be cleared.
  83  */
  84 static inline void il_clear_driver_stations(struct il_priv *il)
  85 {
  86         unsigned long flags;
  87         struct il_rxon_context *ctx;
  88
  89         spin_lock_irqsave(&il->sta_lock, flags);
  90         memset(il->stations, 0, sizeof(il->stations));
  91         il->num_stations = 0;
  92
  93         il->ucode_key_table = 0;
  94
  95         for_each_context(il, ctx) {
  96                 /*
  97                  * Remove all key information that is not stored as part
  98                  * of station information since mac80211 may not have had
  99                  * a chance to remove all the keys. When device is
 100                  * reconfigured by mac80211 after an error all keys will
 101                  * be reconfigured.
 102                  */
 103                 memset(ctx->wep_keys, 0, sizeof(ctx->wep_keys));
 104                 ctx->key_mapping_keys = 0;
 105         }
 106
 107         spin_unlock_irqrestore(&il->sta_lock, flags);
 108 }
 109
 110 static inline int il_sta_id(struct ieee80211_sta *sta)
 111 {
 112         if (WARN_ON(!sta))
 113                 return IL_INVALID_STATION;
 114
 115         return ((struct il_station_priv_common *)sta->drv_priv)->sta_id;
 116 }
 117
 118 /**
 119  * il_sta_id_or_broadcast - return sta_id or broadcast sta
 120  * @il: iwl il
 121  * @context: the current context
 122  * @sta: mac80211 station
 123  *
 124  * In certain circumstances mac80211 passes a station pointer
 125  * that may be %NULL, for example during TX or key setup. In
 126  * that case, we need to use the broadcast station, so this
 127  * inline wraps that pattern.
 128  */
 129 static inline int il_sta_id_or_broadcast(struct il_priv *il,
 130                                           struct il_rxon_context *context,
 131                                           struct ieee80211_sta *sta)
 132 {
 133         int sta_id;
 134
 135         if (!sta)
 136                 return context->bcast_sta_id;
 137
 138         sta_id = il_sta_id(sta);
 139
 140         /*
 141          * mac80211 should not be passing a partially
 142          * initialised station!
 143          */
 144         WARN_ON(sta_id == IL_INVALID_STATION);
 145
 146         return sta_id;
 147 }
 148 #endif /* __il_sta_h__ */