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>
25 /* Common header for Atheros 802.11n base driver cores */
27 #define IEEE80211_WEP_NKID 4
29 #define WME_NUM_TID 16
30 #define WME_BA_BMP_SIZE 64
31 #define WME_MAX_BA WME_BA_BMP_SIZE
32 #define ATH_TID_MAX_BUFS (2 * WME_MAX_BA)
40 #define ATH_RSSI_DUMMY_MARKER 0x127
41 #define ATH_RSSI_LPF_LEN 10
42 #define RSSI_LPF_THRESHOLD -20
43 #define ATH_RSSI_EP_MULTIPLIER (1<<7)
44 #define ATH_EP_MUL(x, mul) ((x) * (mul))
45 #define ATH_RSSI_IN(x) (ATH_EP_MUL((x), ATH_RSSI_EP_MULTIPLIER))
46 #define ATH_LPF_RSSI(x, y, len) \
47 ((x != ATH_RSSI_DUMMY_MARKER) ? (((x) * ((len) - 1) + (y)) / (len)) : (y))
48 #define ATH_RSSI_LPF(x, y) do { \
49 if ((y) >= RSSI_LPF_THRESHOLD) \
50 x = ATH_LPF_RSSI((x), ATH_RSSI_IN((y)), ATH_RSSI_LPF_LEN); \
52 #define ATH_EP_RND(x, mul) \
53 ((((x)%(mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul))
58 struct list_head list;
59 struct list_head tid_q;
62 struct ath_buf_state {
71 enum ath9k_key_type bfs_keytype;
75 struct list_head list;
76 struct ath_buf *bf_lastbf; /* last buf of this unit (a frame or
78 struct ath_buf *bf_next; /* next subframe in the aggregate */
79 struct sk_buff *bf_mpdu; /* enclosing frame structure */
80 void *bf_desc; /* virtual addr of desc */
81 dma_addr_t bf_daddr; /* physical addr of desc */
82 dma_addr_t bf_buf_addr; /* physical addr of data buffer */
87 struct ath_buf_state bf_state;
88 dma_addr_t bf_dmacontext;
89 struct ath_wiphy *aphy;
93 struct list_head list;
94 struct list_head buf_q;
96 struct ath_atx_ac *ac;
97 struct ath_buf *tx_buf[ATH_TID_MAX_BUFS];
102 int baw_head; /* first un-acked tx buffer */
103 int baw_tail; /* next unused tx buffer slot */
110 struct ath_common *common;
111 struct ath_atx_tid tid[WME_NUM_TID];
112 struct ath_atx_ac ac[WME_NUM_AC];
118 int ath9k_cmn_rx_skb_preprocess(struct ath_common *common,
119 struct ieee80211_hw *hw,
121 struct ath_rx_status *rx_stats,
122 struct ieee80211_rx_status *rx_status,
123 bool *decrypt_error);
125 void ath9k_cmn_rx_skb_postprocess(struct ath_common *common,
127 struct ath_rx_status *rx_stats,
128 struct ieee80211_rx_status *rxs,
131 int ath9k_cmn_padpos(__le16 frame_control);
132 int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb);
133 void ath9k_cmn_update_ichannel(struct ieee80211_hw *hw,
134 struct ath9k_channel *ichan);
135 struct ath9k_channel *ath9k_cmn_get_curchannel(struct ieee80211_hw *hw,
137 int ath9k_cmn_key_config(struct ath_common *common,
138 struct ieee80211_vif *vif,
139 struct ieee80211_sta *sta,
140 struct ieee80211_key_conf *key);
141 void ath9k_cmn_key_delete(struct ath_common *common,
142 struct ieee80211_key_conf *key);