drivers/net/wireless/ath/ath9k/common.h

   1 /*
   2  * Copyright (c) 2009-2011 Atheros Communications Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <net/mac80211.h>
  18
  19 #include "../ath.h"
  20
  21 #include "hw.h"
  22 #include "hw-ops.h"
  23
  24 #include "common-init.h"
  25 #include "common-beacon.h"
  26 #include "common-debug.h"
  27 #include "common-spectral.h"
  28
  29 /* Common header for Atheros 802.11n base driver cores */
  30
  31 #define WME_BA_BMP_SIZE         64
  32 #define WME_MAX_BA              WME_BA_BMP_SIZE
  33 #define ATH_TID_MAX_BUFS        (2 * WME_MAX_BA)
  34
  35 #define ATH_RSSI_DUMMY_MARKER   127
  36 #define ATH_RSSI_LPF_LEN                10
  37 #define RSSI_LPF_THRESHOLD              -20
  38 #define ATH_RSSI_EP_MULTIPLIER     (1<<7)
  39 #define ATH_EP_MUL(x, mul)         ((x) * (mul))
  40 #define ATH_RSSI_IN(x)             (ATH_EP_MUL((x), ATH_RSSI_EP_MULTIPLIER))
  41 #define ATH_LPF_RSSI(x, y, len) \
  42     ((x != ATH_RSSI_DUMMY_MARKER) ? (((x) * ((len) - 1) + (y)) / (len)) : (y))
  43 #define ATH_RSSI_LPF(x, y) do {                                         \
  44     if ((y) >= RSSI_LPF_THRESHOLD)                                      \
  45         x = ATH_LPF_RSSI((x), ATH_RSSI_IN((y)), ATH_RSSI_LPF_LEN);      \
  46 } while (0)
  47 #define ATH_EP_RND(x, mul)                                              \
  48         (((x) + ((mul)/2)) / (mul))
  49
  50 #define IEEE80211_MS_TO_TU(x)   (((x) * 1000) / 1024)
  51
  52 struct ath_beacon_config {
  53         int beacon_interval;
  54         u16 dtim_period;
  55         u16 bmiss_timeout;
  56         u8 dtim_count;
  57         u8 enable_beacon;
  58         bool ibss_creator;
  59         u32 nexttbtt;
  60         u32 intval;
  61 };
  62
  63 bool ath9k_cmn_rx_accept(struct ath_common *common,
  64                          struct ieee80211_hdr *hdr,
  65                          struct ieee80211_rx_status *rxs,
  66                          struct ath_rx_status *rx_stats,
  67                          bool *decrypt_error,
  68                          unsigned int rxfilter);
  69 void ath9k_cmn_rx_skb_postprocess(struct ath_common *common,
  70                                   struct sk_buff *skb,
  71                                   struct ath_rx_status *rx_stats,
  72                                   struct ieee80211_rx_status *rxs,
  73                                   bool decrypt_error);
  74 int ath9k_cmn_process_rate(struct ath_common *common,
  75                            struct ieee80211_hw *hw,
  76                            struct ath_rx_status *rx_stats,
  77                            struct ieee80211_rx_status *rxs);
  78 void ath9k_cmn_process_rssi(struct ath_common *common,
  79                             struct ieee80211_hw *hw,
  80                             struct ath_rx_status *rx_stats,
  81                             struct ieee80211_rx_status *rxs);
  82 int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb);
  83 struct ath9k_channel *ath9k_cmn_get_channel(struct ieee80211_hw *hw,
  84                                             struct ath_hw *ah,
  85                                             struct cfg80211_chan_def *chandef);
  86 int ath9k_cmn_count_streams(unsigned int chainmask, int max);
  87 void ath9k_cmn_btcoex_bt_stomp(struct ath_common *common,
  88                                   enum ath_stomp_type stomp_type);
  89 void ath9k_cmn_update_txpow(struct ath_hw *ah, u16 cur_txpow,
  90                             u16 new_txpow, u16 *txpower);
  91 void ath9k_cmn_init_crypto(struct ath_hw *ah);