/* * Copyright (c) 2008-2011 Atheros Communications Inc. * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include <linux/dma-mapping.h> #include "ath9k.h" #include "ar9003_mac.h" #define BITS_PER_BYTE … #define OFDM_PLCP_BITS … #define HT_RC_2_STREAMS(_rc) … #define L_STF … #define L_LTF … #define L_SIG … #define HT_SIG … #define HT_STF … #define HT_LTF(_ns) … #define SYMBOL_TIME(_ns) … #define SYMBOL_TIME_HALFGI(_ns) … #define TIME_SYMBOLS(t) … #define TIME_SYMBOLS_HALFGI(t) … #define NUM_SYMBOLS_PER_USEC(_usec) … #define NUM_SYMBOLS_PER_USEC_HALFGI(_usec) … /* Shifts in ar5008_phy.c and ar9003_phy.c are equal for all revisions */ #define ATH9K_PWRTBL_11NA_OFDM_SHIFT … #define ATH9K_PWRTBL_11NG_OFDM_SHIFT … #define ATH9K_PWRTBL_11NA_HT_SHIFT … #define ATH9K_PWRTBL_11NG_HT_SHIFT … static u16 bits_per_symbol[][2] = …; static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq, struct ath_atx_tid *tid, struct sk_buff *skb); static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb, int tx_flags, struct ath_txq *txq, struct ieee80211_sta *sta); static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, struct ath_txq *txq, struct list_head *bf_q, struct ieee80211_sta *sta, struct ath_tx_status *ts, int txok); static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, struct list_head *head, bool internal); static void ath_tx_rc_status(struct ath_softc *sc, struct ath_buf *bf, struct ath_tx_status *ts, int nframes, int nbad, int txok); static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid, struct ath_buf *bf); static struct ath_buf *ath_tx_setup_buffer(struct ath_softc *sc, struct ath_txq *txq, struct ath_atx_tid *tid, struct sk_buff *skb); static int ath_tx_prepare(struct ieee80211_hw *hw, struct sk_buff *skb, struct ath_tx_control *txctl); enum { … }; /*********************/ /* Aggregation logic */ /*********************/ static void ath_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) { … } void ath_txq_unlock_complete(struct ath_softc *sc, struct ath_txq *txq) __releases(&txq->axq_lock) { … } void ath_tx_queue_tid(struct ath_softc *sc, struct ath_atx_tid *tid) { … } void ath9k_wake_tx_queue(struct ieee80211_hw *hw, struct ieee80211_txq *queue) { … } static struct ath_frame_info *get_frame_info(struct sk_buff *skb) { … } static void ath_send_bar(struct ath_atx_tid *tid, u16 seqno) { … } static bool ath_merge_ratetbl(struct ieee80211_sta *sta, struct ath_buf *bf, struct ieee80211_tx_info *tx_info) { … } static void ath_set_rates(struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct ath_buf *bf) { … } static void ath_txq_skb_done(struct ath_softc *sc, struct ath_txq *txq, struct sk_buff *skb) { … } static struct ath_atx_tid * ath_get_skb_tid(struct ath_softc *sc, struct ath_node *an, struct sk_buff *skb) { … } static int ath_tid_pull(struct ath_atx_tid *tid, struct sk_buff **skbuf) { … } static int ath_tid_dequeue(struct ath_atx_tid *tid, struct sk_buff **skb) { … } static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid) { … } static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid, struct ath_buf *bf) { … } static void ath_tx_addto_baw(struct ath_softc *sc, struct ath_atx_tid *tid, struct ath_buf *bf) { … } static void ath_tid_drain(struct ath_softc *sc, struct ath_txq *txq, struct ath_atx_tid *tid) { … } static void ath_tx_set_retry(struct ath_softc *sc, struct ath_txq *txq, struct sk_buff *skb, int count) { … } static struct ath_buf *ath_tx_get_buffer(struct ath_softc *sc) { … } static void ath_tx_return_buffer(struct ath_softc *sc, struct ath_buf *bf) { … } static struct ath_buf* ath_clone_txbuf(struct ath_softc *sc, struct ath_buf *bf) { … } static void ath_tx_count_frames(struct ath_softc *sc, struct ath_buf *bf, struct ath_tx_status *ts, int txok, int *nframes, int *nbad) { … } static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq, struct ath_buf *bf, struct list_head *bf_q, struct ieee80211_sta *sta, struct ath_atx_tid *tid, struct ath_tx_status *ts, int txok) { … } static bool bf_is_ampdu_not_probing(struct ath_buf *bf) { … } static void ath_tx_count_airtime(struct ath_softc *sc, struct ieee80211_sta *sta, struct ath_buf *bf, struct ath_tx_status *ts, u8 tid) { … } static void ath_tx_process_buffer(struct ath_softc *sc, struct ath_txq *txq, struct ath_tx_status *ts, struct ath_buf *bf, struct list_head *bf_head) { … } static bool ath_lookup_legacy(struct ath_buf *bf) { … } static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf, struct ath_atx_tid *tid) { … } /* * Returns the number of delimiters to be added to * meet the minimum required mpdudensity. */ static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid, struct ath_buf *bf, u16 frmlen, bool first_subfrm) { … } static int ath_tx_get_tid_subframe(struct ath_softc *sc, struct ath_txq *txq, struct ath_atx_tid *tid, struct ath_buf **buf) { … } static int ath_tx_form_aggr(struct ath_softc *sc, struct ath_txq *txq, struct ath_atx_tid *tid, struct list_head *bf_q, struct ath_buf *bf_first) { … } /* * rix - rate index * pktlen - total bytes (delims + data + fcs + pads + pad delims) * width - 0 for 20 MHz, 1 for 40 MHz * half_gi - to use 4us v/s 3.6 us for symbol time */ u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, int pktlen, int width, int half_gi, bool shortPreamble) { … } static int ath_max_framelen(int usec, int mcs, bool ht40, bool sgi) { … } void ath_update_max_aggr_framelen(struct ath_softc *sc, int queue, int txop) { … } static u8 ath_get_rate_txpower(struct ath_softc *sc, struct ath_buf *bf, u8 rateidx, bool is_40, bool is_cck, bool is_mcs) { … } static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf, struct ath_tx_info *info, int len, bool rts) { … } static enum ath9k_pkt_type get_hw_packet_type(struct sk_buff *skb) { … } static void ath_tx_fill_desc(struct ath_softc *sc, struct ath_buf *bf, struct ath_txq *txq, int len) { … } static void ath_tx_form_burst(struct ath_softc *sc, struct ath_txq *txq, struct ath_atx_tid *tid, struct list_head *bf_q, struct ath_buf *bf_first) { … } static int ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq, struct ath_atx_tid *tid) { … } int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid, u16 *ssn) { … } void ath_tx_aggr_stop(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid) { … } void ath_tx_aggr_sleep(struct ieee80211_sta *sta, struct ath_softc *sc, struct ath_node *an) { … } void ath_tx_aggr_wakeup(struct ath_softc *sc, struct ath_node *an) { … } static void ath9k_set_moredata(struct ath_softc *sc, struct ath_buf *bf, bool val) { … } void ath9k_release_buffered_frames(struct ieee80211_hw *hw, struct ieee80211_sta *sta, u16 tids, int nframes, enum ieee80211_frame_release_type reason, bool more_data) { … } /********************/ /* Queue Management */ /********************/ struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype) { … } int ath_txq_update(struct ath_softc *sc, int qnum, struct ath9k_tx_queue_info *qinfo) { … } int ath_cabq_update(struct ath_softc *sc) { … } static void ath_drain_txq_list(struct ath_softc *sc, struct ath_txq *txq, struct list_head *list) { … } /* * Drain a given TX queue (could be Beacon or Data) * * This assumes output has been stopped and * we do not need to block ath_tx_tasklet. */ void ath_draintxq(struct ath_softc *sc, struct ath_txq *txq) { … } bool ath_drain_all_txq(struct ath_softc *sc) { … } void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq) { … } /* For each acq entry, for each tid, try to schedule packets * for transmit until ampdu_depth has reached min Q depth. */ void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq) { … } void ath_txq_schedule_all(struct ath_softc *sc) { … } /***********/ /* TX, DMA */ /***********/ /* * Insert a chain of ath_buf (descriptors) on a txq and * assume the descriptors are already chained together by caller. */ static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, struct list_head *head, bool internal) { … } static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq, struct ath_atx_tid *tid, struct sk_buff *skb) { … } static void setup_frame_info(struct ieee80211_hw *hw, struct ieee80211_sta *sta, struct sk_buff *skb, int framelen) { … } u8 ath_txchainmask_reduction(struct ath_softc *sc, u8 chainmask, u32 rate) { … } /* * Assign a descriptor (and sequence number if necessary, * and map buffer for DMA. Frees skb on error */ static struct ath_buf *ath_tx_setup_buffer(struct ath_softc *sc, struct ath_txq *txq, struct ath_atx_tid *tid, struct sk_buff *skb) { … } void ath_assign_seq(struct ath_common *common, struct sk_buff *skb) { … } static int ath_tx_prepare(struct ieee80211_hw *hw, struct sk_buff *skb, struct ath_tx_control *txctl) { … } /* Upon failure caller should free skb */ int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb, struct ath_tx_control *txctl) { … } void ath_tx_cabq(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct sk_buff *skb) { … } /*****************/ /* TX Completion */ /*****************/ static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb, int tx_flags, struct ath_txq *txq, struct ieee80211_sta *sta) { … } static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, struct ath_txq *txq, struct list_head *bf_q, struct ieee80211_sta *sta, struct ath_tx_status *ts, int txok) { … } static void ath_clear_tx_status(struct ieee80211_tx_info *tx_info) { … } static void ath_tx_rc_status(struct ath_softc *sc, struct ath_buf *bf, struct ath_tx_status *ts, int nframes, int nbad, int txok) { … } static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq) { … } void ath_tx_tasklet(struct ath_softc *sc) { … } void ath_tx_edma_tasklet(struct ath_softc *sc) { … } /*****************/ /* Init, Cleanup */ /*****************/ static int ath_txstatus_setup(struct ath_softc *sc, int size) { … } static int ath_tx_edma_init(struct ath_softc *sc) { … } int ath_tx_init(struct ath_softc *sc, int nbufs) { … } void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an) { … } void ath_tx_node_cleanup(struct ath_softc *sc, struct ath_node *an) { … } #ifdef CONFIG_ATH9K_TX99 int ath9k_tx99_send(struct ath_softc *sc, struct sk_buff *skb, struct ath_tx_control *txctl) { … } #endif /* CONFIG_ATH9K_TX99 */
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