1 /* 2 * Copyright (c) 2009 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 #include "../debug.h" 21 22 #include "hw.h" 23 #include "hw-ops.h" 24 25 /* Common header for Atheros 802.11n base driver cores */ 26 27 #define IEEE80211_WEP_NKID 4 28 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) 33 34 #define WME_AC_BE 0 35 #define WME_AC_BK 1 36 #define WME_AC_VI 2 37 #define WME_AC_VO 3 38 #define WME_NUM_AC 4 39 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); \ 51 } while (0) 52 #define ATH_EP_RND(x, mul) \ 53 ((((x)%(mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul)) 54 55 struct ath_atx_ac { 56 int sched; 57 int qnum; 58 struct list_head list; 59 struct list_head tid_q; 60 }; 61 62 struct ath_buf_state { 63 int bfs_nframes; 64 u16 bfs_al; 65 u16 bfs_frmlen; 66 int bfs_seqno; 67 int bfs_tidno; 68 int bfs_retries; 69 u8 bf_type; 70 u32 bfs_keyix; 71 enum ath9k_key_type bfs_keytype; 72 }; 73 74 struct ath_buf { 75 struct list_head list; 76 struct ath_buf *bf_lastbf; /* last buf of this unit (a frame or 77 an aggregate) */ 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 */ 83 bool bf_stale; 84 bool bf_isnullfunc; 85 bool bf_tx_aborted; 86 u16 bf_flags; 87 struct ath_buf_state bf_state; 88 dma_addr_t bf_dmacontext; 89 struct ath_wiphy *aphy; 90 }; 91 92 struct ath_atx_tid { 93 struct list_head list; 94 struct list_head buf_q; 95 struct ath_node *an; 96 struct ath_atx_ac *ac; 97 struct ath_buf *tx_buf[ATH_TID_MAX_BUFS]; 98 u16 seq_start; 99 u16 seq_next; 100 u16 baw_size; 101 int tidno; 102 int baw_head; /* first un-acked tx buffer */ 103 int baw_tail; /* next unused tx buffer slot */ 104 int sched; 105 int paused; 106 u8 state; 107 }; 108 109 struct ath_node { 110 struct ath_common *common; 111 struct ath_atx_tid tid[WME_NUM_TID]; 112 struct ath_atx_ac ac[WME_NUM_AC]; 113 u16 maxampdu; 114 u8 mpdudensity; 115 int last_rssi; 116 }; 117 118 int ath9k_cmn_rx_skb_preprocess(struct ath_common *common, 119 struct ieee80211_hw *hw, 120 struct sk_buff *skb, 121 struct ath_rx_status *rx_stats, 122 struct ieee80211_rx_status *rx_status, 123 bool *decrypt_error); 124 125 void ath9k_cmn_rx_skb_postprocess(struct ath_common *common, 126 struct sk_buff *skb, 127 struct ath_rx_status *rx_stats, 128 struct ieee80211_rx_status *rxs, 129 bool decrypt_error); 130 131 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, 136 struct ath_hw *ah); 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); 143