2 * Copyright (c) 2009 Atheros Communications Inc.
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.
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.
17 #include <net/mac80211.h>
24 /* Common header for Atheros 802.11n base driver cores */
26 #define IEEE80211_WEP_NKID 4
28 #define WME_NUM_TID 16
29 #define WME_BA_BMP_SIZE 64
30 #define WME_MAX_BA WME_BA_BMP_SIZE
31 #define ATH_TID_MAX_BUFS (2 * WME_MAX_BA)
39 #define ATH_RSSI_DUMMY_MARKER 0x127
40 #define ATH_RSSI_LPF_LEN 10
41 #define RSSI_LPF_THRESHOLD -20
42 #define ATH_RSSI_EP_MULTIPLIER (1<<7)
43 #define ATH_EP_MUL(x, mul) ((x) * (mul))
44 #define ATH_RSSI_IN(x) (ATH_EP_MUL((x), ATH_RSSI_EP_MULTIPLIER))
45 #define ATH_LPF_RSSI(x, y, len) \
46 ((x != ATH_RSSI_DUMMY_MARKER) ? (((x) * ((len) - 1) + (y)) / (len)) : (y))
47 #define ATH_RSSI_LPF(x, y) do { \
48 if ((y) >= RSSI_LPF_THRESHOLD) \
49 x = ATH_LPF_RSSI((x), ATH_RSSI_IN((y)), ATH_RSSI_LPF_LEN); \
51 #define ATH_EP_RND(x, mul) \
52 ((((x)%(mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul))
57 struct list_head list;
58 struct list_head tid_q;
61 struct ath_buf_state {
70 enum ath9k_key_type bfs_keytype;
74 struct list_head list;
75 struct ath_buf *bf_lastbf; /* last buf of this unit (a frame or
77 struct ath_buf *bf_next; /* next subframe in the aggregate */
78 struct sk_buff *bf_mpdu; /* enclosing frame structure */
79 struct ath_desc *bf_desc; /* virtual addr of desc */
80 dma_addr_t bf_daddr; /* physical addr of desc */
81 dma_addr_t bf_buf_addr; /* physical addr of data buffer */
85 struct ath_buf_state bf_state;
86 dma_addr_t bf_dmacontext;
87 struct ath_wiphy *aphy;
91 struct list_head list;
92 struct list_head buf_q;
94 struct ath_atx_ac *ac;
95 struct ath_buf *tx_buf[ATH_TID_MAX_BUFS];
100 int baw_head; /* first un-acked tx buffer */
101 int baw_tail; /* next unused tx buffer slot */
108 struct ath_common *common;
109 struct ath_atx_tid tid[WME_NUM_TID];
110 struct ath_atx_ac ac[WME_NUM_AC];
116 int ath9k_cmn_rx_skb_preprocess(struct ath_common *common,
117 struct ieee80211_hw *hw,
119 struct ath_rx_status *rx_stats,
120 struct ieee80211_rx_status *rx_status,
121 bool *decrypt_error);
123 void ath9k_cmn_rx_skb_postprocess(struct ath_common *common,
125 struct ath_rx_status *rx_stats,
126 struct ieee80211_rx_status *rxs,
129 int ath9k_cmn_padpos(__le16 frame_control);
130 int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb);
131 void ath9k_cmn_update_ichannel(struct ieee80211_hw *hw,
132 struct ath9k_channel *ichan);
133 struct ath9k_channel *ath9k_cmn_get_curchannel(struct ieee80211_hw *hw,
135 int ath9k_cmn_key_config(struct ath_common *common,
136 struct ieee80211_vif *vif,
137 struct ieee80211_sta *sta,
138 struct ieee80211_key_conf *key);
139 void ath9k_cmn_key_delete(struct ath_common *common,
140 struct ieee80211_key_conf *key);