ath/ath9k/common.h

0001 /*
0002  * Copyright (c) 2009-2011 Atheros Communications Inc.
0003  *
0004  * Permission to use, copy, modify, and/or distribute this software for any
0005  * purpose with or without fee is hereby granted, provided that the above
0006  * copyright notice and this permission notice appear in all copies.
0007  *
0008  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
0009  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
0010  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
0011  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
0012  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
0013  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
0014  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
0015  */
0016
0017 #include <net/mac80211.h>
0018
0019 #include "../ath.h"
0020
0021 #include "hw.h"
0022 #include "hw-ops.h"
0023
0024 #include "common-init.h"
0025 #include "common-beacon.h"
0026 #include "common-debug.h"
0027 #include "common-spectral.h"
0028
0029 /* Common header for Atheros 802.11n base driver cores */
0030
0031 #define WME_BA_BMP_SIZE         64
0032 #define WME_MAX_BA              WME_BA_BMP_SIZE
0033 #define ATH_TID_MAX_BUFS        (2 * WME_MAX_BA)
0034
0035 #define ATH_RSSI_DUMMY_MARKER   127
0036 #define ATH_RSSI_LPF_LEN        10
0037 #define RSSI_LPF_THRESHOLD      -20
0038 #define ATH_RSSI_EP_MULTIPLIER     (1<<7)
0039 #define ATH_EP_MUL(x, mul)         ((x) * (mul))
0040 #define ATH_RSSI_IN(x)             (ATH_EP_MUL((x), ATH_RSSI_EP_MULTIPLIER))
0041 #define ATH_LPF_RSSI(x, y, len) \
0042     ((x != ATH_RSSI_DUMMY_MARKER) ? (((x) * ((len) - 1) + (y)) / (len)) : (y))
0043 #define ATH_RSSI_LPF(x, y) do {                                 \
0044     if ((y) >= RSSI_LPF_THRESHOLD)                              \
0045     x = ATH_LPF_RSSI((x), ATH_RSSI_IN((y)), ATH_RSSI_LPF_LEN);      \
0046 } while (0)
0047 #define ATH_EP_RND(x, mul)                      \
0048     (((x) + ((mul)/2)) / (mul))
0049
0050 #define IEEE80211_MS_TO_TU(x)   (((x) * 1000) / 1024)
0051
0052 struct ath_beacon_config {
0053     struct ieee80211_vif *main_vif;
0054     int beacon_interval;
0055     u16 dtim_period;
0056     u16 bmiss_timeout;
0057     u8 dtim_count;
0058     u8 enable_beacon;
0059     bool ibss_creator;
0060     u32 nexttbtt;
0061     u32 intval;
0062 };
0063
0064 bool ath9k_cmn_rx_accept(struct ath_common *common,
0065              struct ieee80211_hdr *hdr,
0066              struct ieee80211_rx_status *rxs,
0067              struct ath_rx_status *rx_stats,
0068              bool *decrypt_error,
0069              unsigned int rxfilter);
0070 void ath9k_cmn_rx_skb_postprocess(struct ath_common *common,
0071                   struct sk_buff *skb,
0072                   struct ath_rx_status *rx_stats,
0073                   struct ieee80211_rx_status *rxs,
0074                   bool decrypt_error);
0075 int ath9k_cmn_process_rate(struct ath_common *common,
0076                struct ieee80211_hw *hw,
0077                struct ath_rx_status *rx_stats,
0078                struct ieee80211_rx_status *rxs);
0079 void ath9k_cmn_process_rssi(struct ath_common *common,
0080                 struct ieee80211_hw *hw,
0081                 struct ath_rx_status *rx_stats,
0082                 struct ieee80211_rx_status *rxs);
0083 int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb);
0084 struct ath9k_channel *ath9k_cmn_get_channel(struct ieee80211_hw *hw,
0085                         struct ath_hw *ah,
0086                         struct cfg80211_chan_def *chandef);
0087 int ath9k_cmn_count_streams(unsigned int chainmask, int max);
0088 void ath9k_cmn_btcoex_bt_stomp(struct ath_common *common,
0089                   enum ath_stomp_type stomp_type);
0090 void ath9k_cmn_update_txpow(struct ath_hw *ah, u16 cur_txpow,
0091                 u16 new_txpow, u16 *txpower);
0092 void ath9k_cmn_init_crypto(struct ath_hw *ah);