mirror of https://gitee.com/openkylin/linux.git
128 lines
3.6 KiB
C
128 lines
3.6 KiB
C
/*
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* Copyright (c) 2009 Atheros Communications Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <net/mac80211.h>
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#include "../ath.h"
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#include "../debug.h"
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#include "hw.h"
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/* Common header for Atheros 802.11n base driver cores */
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#define WME_NUM_TID 16
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#define WME_BA_BMP_SIZE 64
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#define WME_MAX_BA WME_BA_BMP_SIZE
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#define ATH_TID_MAX_BUFS (2 * WME_MAX_BA)
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#define WME_AC_BE 0
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#define WME_AC_BK 1
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#define WME_AC_VI 2
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#define WME_AC_VO 3
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#define WME_NUM_AC 4
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#define ATH_RSSI_DUMMY_MARKER 0x127
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#define ATH_RSSI_LPF_LEN 10
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#define RSSI_LPF_THRESHOLD -20
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#define ATH_RSSI_EP_MULTIPLIER (1<<7)
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#define ATH_EP_MUL(x, mul) ((x) * (mul))
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#define ATH_RSSI_IN(x) (ATH_EP_MUL((x), ATH_RSSI_EP_MULTIPLIER))
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#define ATH_LPF_RSSI(x, y, len) \
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((x != ATH_RSSI_DUMMY_MARKER) ? (((x) * ((len) - 1) + (y)) / (len)) : (y))
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#define ATH_RSSI_LPF(x, y) do { \
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if ((y) >= RSSI_LPF_THRESHOLD) \
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x = ATH_LPF_RSSI((x), ATH_RSSI_IN((y)), ATH_RSSI_LPF_LEN); \
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} while (0)
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#define ATH_EP_RND(x, mul) \
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((((x)%(mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul))
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struct ath_atx_ac {
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int sched;
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int qnum;
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struct list_head list;
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struct list_head tid_q;
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};
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struct ath_buf_state {
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int bfs_nframes;
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u16 bfs_al;
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u16 bfs_frmlen;
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int bfs_seqno;
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int bfs_tidno;
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int bfs_retries;
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u8 bf_type;
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u32 bfs_keyix;
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enum ath9k_key_type bfs_keytype;
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};
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struct ath_buf {
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struct list_head list;
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struct ath_buf *bf_lastbf; /* last buf of this unit (a frame or
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an aggregate) */
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struct ath_buf *bf_next; /* next subframe in the aggregate */
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struct sk_buff *bf_mpdu; /* enclosing frame structure */
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struct ath_desc *bf_desc; /* virtual addr of desc */
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dma_addr_t bf_daddr; /* physical addr of desc */
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dma_addr_t bf_buf_addr; /* physical addr of data buffer */
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bool bf_stale;
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bool bf_isnullfunc;
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u16 bf_flags;
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struct ath_buf_state bf_state;
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dma_addr_t bf_dmacontext;
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struct ath_wiphy *aphy;
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};
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struct ath_atx_tid {
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struct list_head list;
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struct list_head buf_q;
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struct ath_node *an;
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struct ath_atx_ac *ac;
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struct ath_buf *tx_buf[ATH_TID_MAX_BUFS];
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u16 seq_start;
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u16 seq_next;
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u16 baw_size;
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int tidno;
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int baw_head; /* first un-acked tx buffer */
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int baw_tail; /* next unused tx buffer slot */
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int sched;
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int paused;
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u8 state;
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};
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struct ath_node {
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struct ath_common *common;
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struct ath_atx_tid tid[WME_NUM_TID];
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struct ath_atx_ac ac[WME_NUM_AC];
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u16 maxampdu;
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u8 mpdudensity;
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int last_rssi;
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};
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int ath9k_cmn_rx_skb_preprocess(struct ath_common *common,
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struct ieee80211_hw *hw,
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struct sk_buff *skb,
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struct ath_rx_status *rx_stats,
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struct ieee80211_rx_status *rx_status,
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bool *decrypt_error);
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void ath9k_cmn_rx_skb_postprocess(struct ath_common *common,
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struct sk_buff *skb,
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struct ath_rx_status *rx_stats,
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struct ieee80211_rx_status *rxs,
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bool decrypt_error);
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int ath9k_cmn_padpos(__le16 frame_control);
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