Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1 | /* |
Sujith Manoharan | 5b68138 | 2011-05-17 13:36:18 +0530 | [diff] [blame] | 2 | * Copyright (c) 2008-2011 Atheros Communications Inc. |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 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 | |
Alexey Dobriyan | b7f080c | 2011-06-16 11:01:34 +0000 | [diff] [blame] | 17 | #include <linux/dma-mapping.h> |
Sujith | 394cf0a | 2009-02-09 13:26:54 +0530 | [diff] [blame] | 18 | #include "ath9k.h" |
Luis R. Rodriguez | b622a72 | 2010-04-15 17:39:28 -0400 | [diff] [blame] | 19 | #include "ar9003_mac.h" |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 20 | |
| 21 | #define BITS_PER_BYTE 8 |
| 22 | #define OFDM_PLCP_BITS 22 |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 23 | #define HT_RC_2_STREAMS(_rc) ((((_rc) & 0x78) >> 3) + 1) |
| 24 | #define L_STF 8 |
| 25 | #define L_LTF 8 |
| 26 | #define L_SIG 4 |
| 27 | #define HT_SIG 8 |
| 28 | #define HT_STF 4 |
| 29 | #define HT_LTF(_ns) (4 * (_ns)) |
| 30 | #define SYMBOL_TIME(_ns) ((_ns) << 2) /* ns * 4 us */ |
| 31 | #define SYMBOL_TIME_HALFGI(_ns) (((_ns) * 18 + 4) / 5) /* ns * 3.6 us */ |
Felix Fietkau | aa5955c | 2012-07-15 19:53:36 +0200 | [diff] [blame] | 32 | #define TIME_SYMBOLS(t) ((t) >> 2) |
| 33 | #define TIME_SYMBOLS_HALFGI(t) (((t) * 5 - 4) / 18) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 34 | #define NUM_SYMBOLS_PER_USEC(_usec) (_usec >> 2) |
| 35 | #define NUM_SYMBOLS_PER_USEC_HALFGI(_usec) (((_usec*5)-4)/18) |
| 36 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 37 | |
Felix Fietkau | c666387 | 2010-04-19 19:57:33 +0200 | [diff] [blame] | 38 | static u16 bits_per_symbol[][2] = { |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 39 | /* 20MHz 40MHz */ |
| 40 | { 26, 54 }, /* 0: BPSK */ |
| 41 | { 52, 108 }, /* 1: QPSK 1/2 */ |
| 42 | { 78, 162 }, /* 2: QPSK 3/4 */ |
| 43 | { 104, 216 }, /* 3: 16-QAM 1/2 */ |
| 44 | { 156, 324 }, /* 4: 16-QAM 3/4 */ |
| 45 | { 208, 432 }, /* 5: 64-QAM 2/3 */ |
| 46 | { 234, 486 }, /* 6: 64-QAM 3/4 */ |
| 47 | { 260, 540 }, /* 7: 64-QAM 5/6 */ |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 48 | }; |
| 49 | |
| 50 | #define IS_HT_RATE(_rate) ((_rate) & 0x80) |
| 51 | |
Felix Fietkau | 82b873a | 2010-11-11 03:18:37 +0100 | [diff] [blame] | 52 | static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq, |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 53 | struct ath_atx_tid *tid, struct sk_buff *skb); |
| 54 | static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb, |
| 55 | int tx_flags, struct ath_txq *txq); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 56 | static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 57 | struct ath_txq *txq, struct list_head *bf_q, |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 58 | struct ath_tx_status *ts, int txok); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 59 | static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 60 | struct list_head *head, bool internal); |
Felix Fietkau | 0cdd5c6 | 2011-01-24 19:23:17 +0100 | [diff] [blame] | 61 | static void ath_tx_rc_status(struct ath_softc *sc, struct ath_buf *bf, |
| 62 | struct ath_tx_status *ts, int nframes, int nbad, |
Felix Fietkau | 3afd21e | 2011-09-14 21:24:26 +0200 | [diff] [blame] | 63 | int txok); |
Felix Fietkau | 90fa539 | 2010-09-20 13:45:38 +0200 | [diff] [blame] | 64 | static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid, |
| 65 | int seqno); |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 66 | static struct ath_buf *ath_tx_setup_buffer(struct ath_softc *sc, |
| 67 | struct ath_txq *txq, |
| 68 | struct ath_atx_tid *tid, |
Felix Fietkau | 249ee72 | 2012-10-03 21:07:52 +0200 | [diff] [blame] | 69 | struct sk_buff *skb); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 70 | |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 71 | enum { |
Felix Fietkau | 0e668cd | 2010-04-19 19:57:32 +0200 | [diff] [blame] | 72 | MCS_HT20, |
| 73 | MCS_HT20_SGI, |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 74 | MCS_HT40, |
| 75 | MCS_HT40_SGI, |
| 76 | }; |
| 77 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 78 | /*********************/ |
| 79 | /* Aggregation logic */ |
| 80 | /*********************/ |
| 81 | |
Sujith Manoharan | ef1b6cd | 2012-06-04 20:23:37 +0530 | [diff] [blame] | 82 | void ath_txq_lock(struct ath_softc *sc, struct ath_txq *txq) |
Luis R. Rodriguez | 1512a48 | 2011-12-20 10:46:09 -0800 | [diff] [blame] | 83 | __acquires(&txq->axq_lock) |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 84 | { |
| 85 | spin_lock_bh(&txq->axq_lock); |
| 86 | } |
| 87 | |
Sujith Manoharan | ef1b6cd | 2012-06-04 20:23:37 +0530 | [diff] [blame] | 88 | void ath_txq_unlock(struct ath_softc *sc, struct ath_txq *txq) |
Luis R. Rodriguez | 1512a48 | 2011-12-20 10:46:09 -0800 | [diff] [blame] | 89 | __releases(&txq->axq_lock) |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 90 | { |
| 91 | spin_unlock_bh(&txq->axq_lock); |
| 92 | } |
| 93 | |
Sujith Manoharan | ef1b6cd | 2012-06-04 20:23:37 +0530 | [diff] [blame] | 94 | void ath_txq_unlock_complete(struct ath_softc *sc, struct ath_txq *txq) |
Luis R. Rodriguez | 1512a48 | 2011-12-20 10:46:09 -0800 | [diff] [blame] | 95 | __releases(&txq->axq_lock) |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 96 | { |
| 97 | struct sk_buff_head q; |
| 98 | struct sk_buff *skb; |
| 99 | |
| 100 | __skb_queue_head_init(&q); |
| 101 | skb_queue_splice_init(&txq->complete_q, &q); |
| 102 | spin_unlock_bh(&txq->axq_lock); |
| 103 | |
| 104 | while ((skb = __skb_dequeue(&q))) |
| 105 | ieee80211_tx_status(sc->hw, skb); |
| 106 | } |
| 107 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 108 | static void ath_tx_queue_tid(struct ath_txq *txq, struct ath_atx_tid *tid) |
| 109 | { |
| 110 | struct ath_atx_ac *ac = tid->ac; |
| 111 | |
| 112 | if (tid->paused) |
| 113 | return; |
| 114 | |
| 115 | if (tid->sched) |
| 116 | return; |
| 117 | |
| 118 | tid->sched = true; |
| 119 | list_add_tail(&tid->list, &ac->tid_q); |
| 120 | |
| 121 | if (ac->sched) |
| 122 | return; |
| 123 | |
| 124 | ac->sched = true; |
| 125 | list_add_tail(&ac->list, &txq->axq_acq); |
| 126 | } |
| 127 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 128 | static void ath_tx_resume_tid(struct ath_softc *sc, struct ath_atx_tid *tid) |
| 129 | { |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 130 | struct ath_txq *txq = tid->ac->txq; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 131 | |
Lorenzo Bianconi | 7540184 | 2010-08-01 15:47:32 +0200 | [diff] [blame] | 132 | WARN_ON(!tid->paused); |
| 133 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 134 | ath_txq_lock(sc, txq); |
Lorenzo Bianconi | 7540184 | 2010-08-01 15:47:32 +0200 | [diff] [blame] | 135 | tid->paused = false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 136 | |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 137 | if (skb_queue_empty(&tid->buf_q)) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 138 | goto unlock; |
| 139 | |
| 140 | ath_tx_queue_tid(txq, tid); |
| 141 | ath_txq_schedule(sc, txq); |
| 142 | unlock: |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 143 | ath_txq_unlock_complete(sc, txq); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 144 | } |
| 145 | |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 146 | static struct ath_frame_info *get_frame_info(struct sk_buff *skb) |
Felix Fietkau | 76e4522 | 2010-11-14 15:20:08 +0100 | [diff] [blame] | 147 | { |
| 148 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 149 | BUILD_BUG_ON(sizeof(struct ath_frame_info) > |
| 150 | sizeof(tx_info->rate_driver_data)); |
| 151 | return (struct ath_frame_info *) &tx_info->rate_driver_data[0]; |
Felix Fietkau | 76e4522 | 2010-11-14 15:20:08 +0100 | [diff] [blame] | 152 | } |
| 153 | |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 154 | static void ath_send_bar(struct ath_atx_tid *tid, u16 seqno) |
| 155 | { |
| 156 | ieee80211_send_bar(tid->an->vif, tid->an->sta->addr, tid->tidno, |
| 157 | seqno << IEEE80211_SEQ_SEQ_SHIFT); |
| 158 | } |
| 159 | |
Felix Fietkau | 79acac0 | 2013-04-22 23:11:44 +0200 | [diff] [blame] | 160 | static void ath_set_rates(struct ieee80211_vif *vif, struct ieee80211_sta *sta, |
| 161 | struct ath_buf *bf) |
| 162 | { |
| 163 | ieee80211_get_tx_rates(vif, sta, bf->bf_mpdu, bf->rates, |
| 164 | ARRAY_SIZE(bf->rates)); |
| 165 | } |
| 166 | |
Felix Fietkau | 16e2342 | 2013-05-17 12:58:24 +0200 | [diff] [blame] | 167 | static void ath_tx_clear_tid(struct ath_softc *sc, struct ath_atx_tid *tid) |
| 168 | { |
| 169 | tid->state &= ~AGGR_ADDBA_COMPLETE; |
| 170 | tid->state &= ~AGGR_CLEANUP; |
| 171 | if (!tid->stop_cb) |
| 172 | return; |
| 173 | |
| 174 | ieee80211_start_tx_ba_cb_irqsafe(tid->an->vif, tid->an->sta->addr, |
| 175 | tid->tidno); |
| 176 | tid->stop_cb = false; |
| 177 | } |
| 178 | |
| 179 | static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid, |
| 180 | bool flush_packets) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 181 | { |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 182 | struct ath_txq *txq = tid->ac->txq; |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 183 | struct sk_buff *skb; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 184 | struct ath_buf *bf; |
| 185 | struct list_head bf_head; |
Felix Fietkau | 90fa539 | 2010-09-20 13:45:38 +0200 | [diff] [blame] | 186 | struct ath_tx_status ts; |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 187 | struct ath_frame_info *fi; |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 188 | bool sendbar = false; |
Felix Fietkau | 90fa539 | 2010-09-20 13:45:38 +0200 | [diff] [blame] | 189 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 190 | INIT_LIST_HEAD(&bf_head); |
| 191 | |
Felix Fietkau | 90fa539 | 2010-09-20 13:45:38 +0200 | [diff] [blame] | 192 | memset(&ts, 0, sizeof(ts)); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 193 | |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 194 | while ((skb = __skb_dequeue(&tid->buf_q))) { |
| 195 | fi = get_frame_info(skb); |
| 196 | bf = fi->bf; |
Felix Fietkau | 16e2342 | 2013-05-17 12:58:24 +0200 | [diff] [blame] | 197 | if (!bf && !flush_packets) |
| 198 | bf = ath_tx_setup_buffer(sc, txq, tid, skb); |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 199 | |
Felix Fietkau | 249ee72 | 2012-10-03 21:07:52 +0200 | [diff] [blame] | 200 | if (!bf) { |
Felix Fietkau | 16e2342 | 2013-05-17 12:58:24 +0200 | [diff] [blame] | 201 | ieee80211_free_txskb(sc->hw, skb); |
| 202 | continue; |
Felix Fietkau | 249ee72 | 2012-10-03 21:07:52 +0200 | [diff] [blame] | 203 | } |
| 204 | |
Felix Fietkau | 16e2342 | 2013-05-17 12:58:24 +0200 | [diff] [blame] | 205 | if (fi->retries || flush_packets) { |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 206 | list_add_tail(&bf->list, &bf_head); |
Felix Fietkau | 6a0ddae | 2011-08-28 00:32:23 +0200 | [diff] [blame] | 207 | ath_tx_update_baw(sc, tid, bf->bf_state.seqno); |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 208 | ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0); |
| 209 | sendbar = true; |
Felix Fietkau | 90fa539 | 2010-09-20 13:45:38 +0200 | [diff] [blame] | 210 | } else { |
Felix Fietkau | 79acac0 | 2013-04-22 23:11:44 +0200 | [diff] [blame] | 211 | ath_set_rates(tid->an->vif, tid->an->sta, bf); |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 212 | ath_tx_send_normal(sc, txq, NULL, skb); |
Felix Fietkau | 90fa539 | 2010-09-20 13:45:38 +0200 | [diff] [blame] | 213 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 214 | } |
| 215 | |
Felix Fietkau | 16e2342 | 2013-05-17 12:58:24 +0200 | [diff] [blame] | 216 | if (tid->baw_head == tid->baw_tail) |
| 217 | ath_tx_clear_tid(sc, tid); |
Nikolay Martynov | 4eb287a | 2011-11-21 17:32:06 -0500 | [diff] [blame] | 218 | |
Felix Fietkau | 16e2342 | 2013-05-17 12:58:24 +0200 | [diff] [blame] | 219 | if (sendbar && !flush_packets) { |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 220 | ath_txq_unlock(sc, txq); |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 221 | ath_send_bar(tid, tid->seq_start); |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 222 | ath_txq_lock(sc, txq); |
| 223 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 224 | } |
| 225 | |
| 226 | static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid, |
| 227 | int seqno) |
| 228 | { |
| 229 | int index, cindex; |
| 230 | |
| 231 | index = ATH_BA_INDEX(tid->seq_start, seqno); |
| 232 | cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); |
| 233 | |
Felix Fietkau | 81ee13b | 2010-09-20 13:45:36 +0200 | [diff] [blame] | 234 | __clear_bit(cindex, tid->tx_buf); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 235 | |
Felix Fietkau | 81ee13b | 2010-09-20 13:45:36 +0200 | [diff] [blame] | 236 | while (tid->baw_head != tid->baw_tail && !test_bit(tid->baw_head, tid->tx_buf)) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 237 | INCR(tid->seq_start, IEEE80211_SEQ_MAX); |
| 238 | INCR(tid->baw_head, ATH_TID_MAX_BUFS); |
Felix Fietkau | f943754 | 2011-12-14 22:08:08 +0100 | [diff] [blame] | 239 | if (tid->bar_index >= 0) |
| 240 | tid->bar_index--; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 241 | } |
| 242 | } |
| 243 | |
| 244 | static void ath_tx_addto_baw(struct ath_softc *sc, struct ath_atx_tid *tid, |
Felix Fietkau | 2d3bcba | 2010-11-14 15:20:01 +0100 | [diff] [blame] | 245 | u16 seqno) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 246 | { |
| 247 | int index, cindex; |
| 248 | |
Felix Fietkau | 2d3bcba | 2010-11-14 15:20:01 +0100 | [diff] [blame] | 249 | index = ATH_BA_INDEX(tid->seq_start, seqno); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 250 | cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); |
Felix Fietkau | 81ee13b | 2010-09-20 13:45:36 +0200 | [diff] [blame] | 251 | __set_bit(cindex, tid->tx_buf); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 252 | |
| 253 | if (index >= ((tid->baw_tail - tid->baw_head) & |
| 254 | (ATH_TID_MAX_BUFS - 1))) { |
| 255 | tid->baw_tail = cindex; |
| 256 | INCR(tid->baw_tail, ATH_TID_MAX_BUFS); |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | /* |
| 261 | * TODO: For frame(s) that are in the retry state, we will reuse the |
| 262 | * sequence number(s) without setting the retry bit. The |
| 263 | * alternative is to give up on these and BAR the receiver's window |
| 264 | * forward. |
| 265 | */ |
| 266 | static void ath_tid_drain(struct ath_softc *sc, struct ath_txq *txq, |
| 267 | struct ath_atx_tid *tid) |
| 268 | |
| 269 | { |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 270 | struct sk_buff *skb; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 271 | struct ath_buf *bf; |
| 272 | struct list_head bf_head; |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 273 | struct ath_tx_status ts; |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 274 | struct ath_frame_info *fi; |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 275 | |
| 276 | memset(&ts, 0, sizeof(ts)); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 277 | INIT_LIST_HEAD(&bf_head); |
| 278 | |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 279 | while ((skb = __skb_dequeue(&tid->buf_q))) { |
| 280 | fi = get_frame_info(skb); |
| 281 | bf = fi->bf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 282 | |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 283 | if (!bf) { |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 284 | ath_tx_complete(sc, skb, ATH_TX_ERROR, txq); |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 285 | continue; |
| 286 | } |
| 287 | |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 288 | list_add_tail(&bf->list, &bf_head); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 289 | |
Felix Fietkau | 6bb4880 | 2013-05-17 12:58:26 +0200 | [diff] [blame] | 290 | ath_tx_update_baw(sc, tid, bf->bf_state.seqno); |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 291 | ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 292 | } |
| 293 | |
| 294 | tid->seq_next = tid->seq_start; |
| 295 | tid->baw_tail = tid->baw_head; |
Felix Fietkau | f943754 | 2011-12-14 22:08:08 +0100 | [diff] [blame] | 296 | tid->bar_index = -1; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 297 | } |
| 298 | |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 299 | static void ath_tx_set_retry(struct ath_softc *sc, struct ath_txq *txq, |
Felix Fietkau | da64762 | 2011-12-14 22:08:03 +0100 | [diff] [blame] | 300 | struct sk_buff *skb, int count) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 301 | { |
Felix Fietkau | 8b7f853 | 2010-11-28 19:37:48 +0100 | [diff] [blame] | 302 | struct ath_frame_info *fi = get_frame_info(skb); |
Felix Fietkau | f11cc94 | 2011-09-15 12:59:49 +0200 | [diff] [blame] | 303 | struct ath_buf *bf = fi->bf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 304 | struct ieee80211_hdr *hdr; |
Felix Fietkau | da64762 | 2011-12-14 22:08:03 +0100 | [diff] [blame] | 305 | int prev = fi->retries; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 306 | |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 307 | TX_STAT_INC(txq->axq_qnum, a_retries); |
Felix Fietkau | da64762 | 2011-12-14 22:08:03 +0100 | [diff] [blame] | 308 | fi->retries += count; |
| 309 | |
| 310 | if (prev > 0) |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 311 | return; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 312 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 313 | hdr = (struct ieee80211_hdr *)skb->data; |
| 314 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_RETRY); |
Felix Fietkau | f11cc94 | 2011-09-15 12:59:49 +0200 | [diff] [blame] | 315 | dma_sync_single_for_device(sc->dev, bf->bf_buf_addr, |
| 316 | sizeof(*hdr), DMA_TO_DEVICE); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 317 | } |
| 318 | |
Felix Fietkau | 0a8cea8 | 2010-04-19 19:57:30 +0200 | [diff] [blame] | 319 | static struct ath_buf *ath_tx_get_buffer(struct ath_softc *sc) |
| 320 | { |
| 321 | struct ath_buf *bf = NULL; |
| 322 | |
| 323 | spin_lock_bh(&sc->tx.txbuflock); |
| 324 | |
| 325 | if (unlikely(list_empty(&sc->tx.txbuf))) { |
| 326 | spin_unlock_bh(&sc->tx.txbuflock); |
| 327 | return NULL; |
| 328 | } |
| 329 | |
| 330 | bf = list_first_entry(&sc->tx.txbuf, struct ath_buf, list); |
| 331 | list_del(&bf->list); |
| 332 | |
| 333 | spin_unlock_bh(&sc->tx.txbuflock); |
| 334 | |
| 335 | return bf; |
| 336 | } |
| 337 | |
| 338 | static void ath_tx_return_buffer(struct ath_softc *sc, struct ath_buf *bf) |
| 339 | { |
| 340 | spin_lock_bh(&sc->tx.txbuflock); |
| 341 | list_add_tail(&bf->list, &sc->tx.txbuf); |
| 342 | spin_unlock_bh(&sc->tx.txbuflock); |
| 343 | } |
| 344 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 345 | static struct ath_buf* ath_clone_txbuf(struct ath_softc *sc, struct ath_buf *bf) |
| 346 | { |
| 347 | struct ath_buf *tbf; |
| 348 | |
Felix Fietkau | 0a8cea8 | 2010-04-19 19:57:30 +0200 | [diff] [blame] | 349 | tbf = ath_tx_get_buffer(sc); |
| 350 | if (WARN_ON(!tbf)) |
Vasanthakumar Thiagarajan | 8a46097 | 2009-06-10 17:50:09 +0530 | [diff] [blame] | 351 | return NULL; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 352 | |
| 353 | ATH_TXBUF_RESET(tbf); |
| 354 | |
| 355 | tbf->bf_mpdu = bf->bf_mpdu; |
| 356 | tbf->bf_buf_addr = bf->bf_buf_addr; |
Vasanthakumar Thiagarajan | d826c83 | 2010-04-15 17:38:45 -0400 | [diff] [blame] | 357 | memcpy(tbf->bf_desc, bf->bf_desc, sc->sc_ah->caps.tx_desc_len); |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 358 | tbf->bf_state = bf->bf_state; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 359 | |
| 360 | return tbf; |
| 361 | } |
| 362 | |
Felix Fietkau | b572d03 | 2010-11-14 15:20:07 +0100 | [diff] [blame] | 363 | static void ath_tx_count_frames(struct ath_softc *sc, struct ath_buf *bf, |
| 364 | struct ath_tx_status *ts, int txok, |
| 365 | int *nframes, int *nbad) |
| 366 | { |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 367 | struct ath_frame_info *fi; |
Felix Fietkau | b572d03 | 2010-11-14 15:20:07 +0100 | [diff] [blame] | 368 | u16 seq_st = 0; |
| 369 | u32 ba[WME_BA_BMP_SIZE >> 5]; |
| 370 | int ba_index; |
| 371 | int isaggr = 0; |
| 372 | |
| 373 | *nbad = 0; |
| 374 | *nframes = 0; |
| 375 | |
Felix Fietkau | b572d03 | 2010-11-14 15:20:07 +0100 | [diff] [blame] | 376 | isaggr = bf_isaggr(bf); |
| 377 | if (isaggr) { |
| 378 | seq_st = ts->ts_seqnum; |
| 379 | memcpy(ba, &ts->ba_low, WME_BA_BMP_SIZE >> 3); |
| 380 | } |
| 381 | |
| 382 | while (bf) { |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 383 | fi = get_frame_info(bf->bf_mpdu); |
Felix Fietkau | 6a0ddae | 2011-08-28 00:32:23 +0200 | [diff] [blame] | 384 | ba_index = ATH_BA_INDEX(seq_st, bf->bf_state.seqno); |
Felix Fietkau | b572d03 | 2010-11-14 15:20:07 +0100 | [diff] [blame] | 385 | |
| 386 | (*nframes)++; |
| 387 | if (!txok || (isaggr && !ATH_BA_ISSET(ba, ba_index))) |
| 388 | (*nbad)++; |
| 389 | |
| 390 | bf = bf->bf_next; |
| 391 | } |
| 392 | } |
| 393 | |
| 394 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 395 | static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq, |
| 396 | struct ath_buf *bf, struct list_head *bf_q, |
Felix Fietkau | 1381559 | 2013-01-20 18:51:53 +0100 | [diff] [blame] | 397 | struct ath_tx_status *ts, int txok) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 398 | { |
| 399 | struct ath_node *an = NULL; |
| 400 | struct sk_buff *skb; |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 401 | struct ieee80211_sta *sta; |
Felix Fietkau | 0cdd5c6 | 2011-01-24 19:23:17 +0100 | [diff] [blame] | 402 | struct ieee80211_hw *hw = sc->hw; |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 403 | struct ieee80211_hdr *hdr; |
Luis R. Rodriguez | 76d5a9e | 2009-11-02 16:08:34 -0800 | [diff] [blame] | 404 | struct ieee80211_tx_info *tx_info; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 405 | struct ath_atx_tid *tid = NULL; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 406 | struct ath_buf *bf_next, *bf_last = bf->bf_lastbf; |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 407 | struct list_head bf_head; |
| 408 | struct sk_buff_head bf_pending; |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 409 | u16 seq_st = 0, acked_cnt = 0, txfail_cnt = 0, seq_first; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 410 | u32 ba[WME_BA_BMP_SIZE >> 5]; |
Vasanthakumar Thiagarajan | 0934af2 | 2009-03-18 20:22:00 +0530 | [diff] [blame] | 411 | int isaggr, txfail, txpending, sendbar = 0, needreset = 0, nbad = 0; |
Sven Eckelmann | 6fe7cc7 | 2012-10-29 13:25:20 +0100 | [diff] [blame] | 412 | bool rc_update = true, isba; |
Felix Fietkau | 78c4653 | 2010-06-25 01:26:16 +0200 | [diff] [blame] | 413 | struct ieee80211_tx_rate rates[4]; |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 414 | struct ath_frame_info *fi; |
Björn Smedman | ebd0228 | 2010-10-10 22:44:39 +0200 | [diff] [blame] | 415 | int nframes; |
Felix Fietkau | 5daefbd | 2010-11-14 15:20:02 +0100 | [diff] [blame] | 416 | u8 tidno; |
Felix Fietkau | daa5c40 | 2011-10-07 02:28:15 +0200 | [diff] [blame] | 417 | bool flush = !!(ts->ts_status & ATH9K_TX_FLUSH); |
Felix Fietkau | da64762 | 2011-12-14 22:08:03 +0100 | [diff] [blame] | 418 | int i, retries; |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 419 | int bar_index = -1; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 420 | |
Sujith | a22be22 | 2009-03-30 15:28:36 +0530 | [diff] [blame] | 421 | skb = bf->bf_mpdu; |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 422 | hdr = (struct ieee80211_hdr *)skb->data; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 423 | |
Luis R. Rodriguez | 76d5a9e | 2009-11-02 16:08:34 -0800 | [diff] [blame] | 424 | tx_info = IEEE80211_SKB_CB(skb); |
Luis R. Rodriguez | 76d5a9e | 2009-11-02 16:08:34 -0800 | [diff] [blame] | 425 | |
Felix Fietkau | 79acac0 | 2013-04-22 23:11:44 +0200 | [diff] [blame] | 426 | memcpy(rates, bf->rates, sizeof(rates)); |
Felix Fietkau | 78c4653 | 2010-06-25 01:26:16 +0200 | [diff] [blame] | 427 | |
Felix Fietkau | da64762 | 2011-12-14 22:08:03 +0100 | [diff] [blame] | 428 | retries = ts->ts_longretry + 1; |
| 429 | for (i = 0; i < ts->ts_rateindex; i++) |
| 430 | retries += rates[i].count; |
| 431 | |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 432 | rcu_read_lock(); |
| 433 | |
Ben Greear | 686b9cb | 2010-09-23 09:44:36 -0700 | [diff] [blame] | 434 | sta = ieee80211_find_sta_by_ifaddr(hw, hdr->addr1, hdr->addr2); |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 435 | if (!sta) { |
| 436 | rcu_read_unlock(); |
Felix Fietkau | 73e1946 | 2010-07-07 19:42:09 +0200 | [diff] [blame] | 437 | |
Felix Fietkau | 31e79a5 | 2010-07-12 23:16:34 +0200 | [diff] [blame] | 438 | INIT_LIST_HEAD(&bf_head); |
| 439 | while (bf) { |
| 440 | bf_next = bf->bf_next; |
| 441 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 442 | if (!bf->bf_stale || bf_next != NULL) |
Felix Fietkau | 31e79a5 | 2010-07-12 23:16:34 +0200 | [diff] [blame] | 443 | list_move_tail(&bf->list, &bf_head); |
| 444 | |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 445 | ath_tx_complete_buf(sc, bf, txq, &bf_head, ts, 0); |
Felix Fietkau | 31e79a5 | 2010-07-12 23:16:34 +0200 | [diff] [blame] | 446 | |
| 447 | bf = bf_next; |
| 448 | } |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 449 | return; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 450 | } |
| 451 | |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 452 | an = (struct ath_node *)sta->drv_priv; |
Felix Fietkau | 5daefbd | 2010-11-14 15:20:02 +0100 | [diff] [blame] | 453 | tidno = ieee80211_get_qos_ctl(hdr)[0] & IEEE80211_QOS_CTL_TID_MASK; |
| 454 | tid = ATH_AN_2_TID(an, tidno); |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 455 | seq_first = tid->seq_start; |
Sven Eckelmann | 6fe7cc7 | 2012-10-29 13:25:20 +0100 | [diff] [blame] | 456 | isba = ts->ts_flags & ATH9K_TX_BA; |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 457 | |
Felix Fietkau | b11b160 | 2010-07-11 12:48:44 +0200 | [diff] [blame] | 458 | /* |
| 459 | * The hardware occasionally sends a tx status for the wrong TID. |
| 460 | * In this case, the BA status cannot be considered valid and all |
| 461 | * subframes need to be retransmitted |
Sven Eckelmann | 6fe7cc7 | 2012-10-29 13:25:20 +0100 | [diff] [blame] | 462 | * |
| 463 | * Only BlockAcks have a TID and therefore normal Acks cannot be |
| 464 | * checked |
Felix Fietkau | b11b160 | 2010-07-11 12:48:44 +0200 | [diff] [blame] | 465 | */ |
Sven Eckelmann | 6fe7cc7 | 2012-10-29 13:25:20 +0100 | [diff] [blame] | 466 | if (isba && tidno != ts->tid) |
Felix Fietkau | b11b160 | 2010-07-11 12:48:44 +0200 | [diff] [blame] | 467 | txok = false; |
| 468 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 469 | isaggr = bf_isaggr(bf); |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 470 | memset(ba, 0, WME_BA_BMP_SIZE >> 3); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 471 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 472 | if (isaggr && txok) { |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 473 | if (ts->ts_flags & ATH9K_TX_BA) { |
| 474 | seq_st = ts->ts_seqnum; |
| 475 | memcpy(ba, &ts->ba_low, WME_BA_BMP_SIZE >> 3); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 476 | } else { |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 477 | /* |
| 478 | * AR5416 can become deaf/mute when BA |
| 479 | * issue happens. Chip needs to be reset. |
| 480 | * But AP code may have sychronization issues |
| 481 | * when perform internal reset in this routine. |
| 482 | * Only enable reset in STA mode for now. |
| 483 | */ |
Sujith | 2660b81 | 2009-02-09 13:27:26 +0530 | [diff] [blame] | 484 | if (sc->sc_ah->opmode == NL80211_IFTYPE_STATION) |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 485 | needreset = 1; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 486 | } |
| 487 | } |
| 488 | |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 489 | __skb_queue_head_init(&bf_pending); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 490 | |
Felix Fietkau | b572d03 | 2010-11-14 15:20:07 +0100 | [diff] [blame] | 491 | ath_tx_count_frames(sc, bf, ts, txok, &nframes, &nbad); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 492 | while (bf) { |
Felix Fietkau | 6a0ddae | 2011-08-28 00:32:23 +0200 | [diff] [blame] | 493 | u16 seqno = bf->bf_state.seqno; |
| 494 | |
Felix Fietkau | f0b8220 | 2011-01-15 14:30:15 +0100 | [diff] [blame] | 495 | txfail = txpending = sendbar = 0; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 496 | bf_next = bf->bf_next; |
| 497 | |
Felix Fietkau | 78c4653 | 2010-06-25 01:26:16 +0200 | [diff] [blame] | 498 | skb = bf->bf_mpdu; |
| 499 | tx_info = IEEE80211_SKB_CB(skb); |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 500 | fi = get_frame_info(skb); |
Felix Fietkau | 78c4653 | 2010-06-25 01:26:16 +0200 | [diff] [blame] | 501 | |
Felix Fietkau | 6a0ddae | 2011-08-28 00:32:23 +0200 | [diff] [blame] | 502 | if (ATH_BA_ISSET(ba, ATH_BA_INDEX(seq_st, seqno))) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 503 | /* transmit completion, subframe is |
| 504 | * acked by block ack */ |
Vasanthakumar Thiagarajan | 0934af2 | 2009-03-18 20:22:00 +0530 | [diff] [blame] | 505 | acked_cnt++; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 506 | } else if (!isaggr && txok) { |
| 507 | /* transmit completion */ |
Vasanthakumar Thiagarajan | 0934af2 | 2009-03-18 20:22:00 +0530 | [diff] [blame] | 508 | acked_cnt++; |
Felix Fietkau | 1381559 | 2013-01-20 18:51:53 +0100 | [diff] [blame] | 509 | } else if (tid->state & AGGR_CLEANUP) { |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 510 | /* |
| 511 | * cleanup in progress, just fail |
| 512 | * the un-acked sub-frames |
| 513 | */ |
| 514 | txfail = 1; |
| 515 | } else if (flush) { |
| 516 | txpending = 1; |
| 517 | } else if (fi->retries < ATH_MAX_SW_RETRIES) { |
| 518 | if (txok || !an->sleeping) |
| 519 | ath_tx_set_retry(sc, txq, bf->bf_mpdu, |
| 520 | retries); |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 521 | |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 522 | txpending = 1; |
| 523 | } else { |
| 524 | txfail = 1; |
| 525 | txfail_cnt++; |
| 526 | bar_index = max_t(int, bar_index, |
| 527 | ATH_BA_INDEX(seq_first, seqno)); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 528 | } |
| 529 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 530 | /* |
| 531 | * Make sure the last desc is reclaimed if it |
| 532 | * not a holding desc. |
| 533 | */ |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 534 | INIT_LIST_HEAD(&bf_head); |
Felix Fietkau | 99ba6a4 | 2013-04-08 00:04:13 +0200 | [diff] [blame] | 535 | if (bf_next != NULL || !bf_last->bf_stale) |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 536 | list_move_tail(&bf->list, &bf_head); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 537 | |
Felix Fietkau | 90fa539 | 2010-09-20 13:45:38 +0200 | [diff] [blame] | 538 | if (!txpending || (tid->state & AGGR_CLEANUP)) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 539 | /* |
| 540 | * complete the acked-ones/xretried ones; update |
| 541 | * block-ack window |
| 542 | */ |
Felix Fietkau | 6a0ddae | 2011-08-28 00:32:23 +0200 | [diff] [blame] | 543 | ath_tx_update_baw(sc, tid, seqno); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 544 | |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 545 | if (rc_update && (acked_cnt == 1 || txfail_cnt == 1)) { |
Felix Fietkau | 78c4653 | 2010-06-25 01:26:16 +0200 | [diff] [blame] | 546 | memcpy(tx_info->control.rates, rates, sizeof(rates)); |
Felix Fietkau | 3afd21e | 2011-09-14 21:24:26 +0200 | [diff] [blame] | 547 | ath_tx_rc_status(sc, bf, ts, nframes, nbad, txok); |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 548 | rc_update = false; |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 549 | } |
| 550 | |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 551 | ath_tx_complete_buf(sc, bf, txq, &bf_head, ts, |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 552 | !txfail); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 553 | } else { |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 554 | /* retry the un-acked ones */ |
Felix Fietkau | 99ba6a4 | 2013-04-08 00:04:13 +0200 | [diff] [blame] | 555 | if (bf->bf_next == NULL && bf_last->bf_stale) { |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 556 | struct ath_buf *tbf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 557 | |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 558 | tbf = ath_clone_txbuf(sc, bf_last); |
| 559 | /* |
| 560 | * Update tx baw and complete the |
| 561 | * frame with failed status if we |
| 562 | * run out of tx buf. |
| 563 | */ |
| 564 | if (!tbf) { |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 565 | ath_tx_update_baw(sc, tid, seqno); |
Vasanthakumar Thiagarajan | c41d92d | 2009-07-14 20:17:11 -0400 | [diff] [blame] | 566 | |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 567 | ath_tx_complete_buf(sc, bf, txq, |
| 568 | &bf_head, ts, 0); |
| 569 | bar_index = max_t(int, bar_index, |
| 570 | ATH_BA_INDEX(seq_first, seqno)); |
| 571 | break; |
Vasanthakumar Thiagarajan | c41d92d | 2009-07-14 20:17:11 -0400 | [diff] [blame] | 572 | } |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 573 | |
| 574 | fi->bf = tbf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 575 | } |
| 576 | |
| 577 | /* |
| 578 | * Put this buffer to the temporary pending |
| 579 | * queue to retain ordering |
| 580 | */ |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 581 | __skb_queue_tail(&bf_pending, skb); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 582 | } |
| 583 | |
| 584 | bf = bf_next; |
| 585 | } |
| 586 | |
Felix Fietkau | 4cee786 | 2010-07-23 03:53:16 +0200 | [diff] [blame] | 587 | /* prepend un-acked frames to the beginning of the pending frame queue */ |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 588 | if (!skb_queue_empty(&bf_pending)) { |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 589 | if (an->sleeping) |
Johannes Berg | 042ec45 | 2011-09-29 16:04:26 +0200 | [diff] [blame] | 590 | ieee80211_sta_set_buffered(sta, tid->tidno, true); |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 591 | |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 592 | skb_queue_splice(&bf_pending, &tid->buf_q); |
Felix Fietkau | 26a6425 | 2011-10-07 02:28:14 +0200 | [diff] [blame] | 593 | if (!an->sleeping) { |
Felix Fietkau | 9af73cf | 2011-08-10 15:23:35 -0600 | [diff] [blame] | 594 | ath_tx_queue_tid(txq, tid); |
Felix Fietkau | 26a6425 | 2011-10-07 02:28:14 +0200 | [diff] [blame] | 595 | |
Sujith Manoharan | adfbda6 | 2012-08-29 09:20:42 +0530 | [diff] [blame] | 596 | if (ts->ts_status & (ATH9K_TXERR_FILT | ATH9K_TXERR_XRETRY)) |
Felix Fietkau | 26a6425 | 2011-10-07 02:28:14 +0200 | [diff] [blame] | 597 | tid->ac->clear_ps_filter = true; |
| 598 | } |
Felix Fietkau | 4cee786 | 2010-07-23 03:53:16 +0200 | [diff] [blame] | 599 | } |
| 600 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 601 | if (bar_index >= 0) { |
| 602 | u16 bar_seq = ATH_BA_INDEX2SEQ(seq_first, bar_index); |
| 603 | |
| 604 | if (BAW_WITHIN(tid->seq_start, tid->baw_size, bar_seq)) |
| 605 | tid->bar_index = ATH_BA_INDEX(tid->seq_start, bar_seq); |
| 606 | |
| 607 | ath_txq_unlock(sc, txq); |
| 608 | ath_send_bar(tid, ATH_BA_INDEX2SEQ(seq_first, bar_index + 1)); |
| 609 | ath_txq_lock(sc, txq); |
| 610 | } |
| 611 | |
Nikolay Martynov | 4eb287a | 2011-11-21 17:32:06 -0500 | [diff] [blame] | 612 | if (tid->state & AGGR_CLEANUP) |
Felix Fietkau | 16e2342 | 2013-05-17 12:58:24 +0200 | [diff] [blame] | 613 | ath_tx_flush_tid(sc, tid, false); |
Felix Fietkau | 90fa539 | 2010-09-20 13:45:38 +0200 | [diff] [blame] | 614 | |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 615 | rcu_read_unlock(); |
| 616 | |
Rajkumar Manoharan | 124b979 | 2012-07-17 17:16:42 +0530 | [diff] [blame] | 617 | if (needreset) |
| 618 | ath9k_queue_reset(sc, RESET_TYPE_TX_ERROR); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 619 | } |
| 620 | |
Felix Fietkau | 81b5195 | 2013-01-20 18:51:54 +0100 | [diff] [blame] | 621 | static bool bf_is_ampdu_not_probing(struct ath_buf *bf) |
| 622 | { |
| 623 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(bf->bf_mpdu); |
| 624 | return bf_isampdu(bf) && !(info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE); |
| 625 | } |
| 626 | |
| 627 | static void ath_tx_process_buffer(struct ath_softc *sc, struct ath_txq *txq, |
| 628 | struct ath_tx_status *ts, struct ath_buf *bf, |
| 629 | struct list_head *bf_head) |
| 630 | { |
Felix Fietkau | 0c585dd | 2013-05-17 12:58:25 +0200 | [diff] [blame] | 631 | struct ieee80211_tx_info *info; |
Felix Fietkau | 81b5195 | 2013-01-20 18:51:54 +0100 | [diff] [blame] | 632 | bool txok, flush; |
| 633 | |
| 634 | txok = !(ts->ts_status & ATH9K_TXERR_MASK); |
| 635 | flush = !!(ts->ts_status & ATH9K_TX_FLUSH); |
| 636 | txq->axq_tx_inprogress = false; |
| 637 | |
| 638 | txq->axq_depth--; |
| 639 | if (bf_is_ampdu_not_probing(bf)) |
| 640 | txq->axq_ampdu_depth--; |
| 641 | |
| 642 | if (!bf_isampdu(bf)) { |
Felix Fietkau | 0c585dd | 2013-05-17 12:58:25 +0200 | [diff] [blame] | 643 | if (!flush) { |
| 644 | info = IEEE80211_SKB_CB(bf->bf_mpdu); |
| 645 | memcpy(info->control.rates, bf->rates, |
| 646 | sizeof(info->control.rates)); |
Felix Fietkau | 81b5195 | 2013-01-20 18:51:54 +0100 | [diff] [blame] | 647 | ath_tx_rc_status(sc, bf, ts, 1, txok ? 0 : 1, txok); |
Felix Fietkau | 0c585dd | 2013-05-17 12:58:25 +0200 | [diff] [blame] | 648 | } |
Felix Fietkau | 81b5195 | 2013-01-20 18:51:54 +0100 | [diff] [blame] | 649 | ath_tx_complete_buf(sc, bf, txq, bf_head, ts, txok); |
| 650 | } else |
| 651 | ath_tx_complete_aggr(sc, txq, bf, bf_head, ts, txok); |
| 652 | |
| 653 | if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) && !flush) |
| 654 | ath_txq_schedule(sc, txq); |
| 655 | } |
| 656 | |
Rajkumar Manoharan | 1a6e9d0 | 2011-08-23 12:32:57 +0530 | [diff] [blame] | 657 | static bool ath_lookup_legacy(struct ath_buf *bf) |
| 658 | { |
| 659 | struct sk_buff *skb; |
| 660 | struct ieee80211_tx_info *tx_info; |
| 661 | struct ieee80211_tx_rate *rates; |
| 662 | int i; |
| 663 | |
| 664 | skb = bf->bf_mpdu; |
| 665 | tx_info = IEEE80211_SKB_CB(skb); |
| 666 | rates = tx_info->control.rates; |
| 667 | |
Felix Fietkau | 059ee09 | 2011-08-27 10:25:27 +0200 | [diff] [blame] | 668 | for (i = 0; i < 4; i++) { |
| 669 | if (!rates[i].count || rates[i].idx < 0) |
| 670 | break; |
| 671 | |
Rajkumar Manoharan | 1a6e9d0 | 2011-08-23 12:32:57 +0530 | [diff] [blame] | 672 | if (!(rates[i].flags & IEEE80211_TX_RC_MCS)) |
| 673 | return true; |
| 674 | } |
| 675 | |
| 676 | return false; |
| 677 | } |
| 678 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 679 | static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf, |
| 680 | struct ath_atx_tid *tid) |
| 681 | { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 682 | struct sk_buff *skb; |
| 683 | struct ieee80211_tx_info *tx_info; |
| 684 | struct ieee80211_tx_rate *rates; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 685 | u32 max_4ms_framelen, frmlen; |
Sujith Manoharan | c0ac53f | 2012-02-22 12:40:38 +0530 | [diff] [blame] | 686 | u16 aggr_limit, bt_aggr_limit, legacy = 0; |
Felix Fietkau | aa5955c | 2012-07-15 19:53:36 +0200 | [diff] [blame] | 687 | int q = tid->ac->txq->mac80211_qnum; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 688 | int i; |
| 689 | |
Sujith | a22be22 | 2009-03-30 15:28:36 +0530 | [diff] [blame] | 690 | skb = bf->bf_mpdu; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 691 | tx_info = IEEE80211_SKB_CB(skb); |
Felix Fietkau | 0c585dd | 2013-05-17 12:58:25 +0200 | [diff] [blame] | 692 | rates = bf->rates; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 693 | |
| 694 | /* |
| 695 | * Find the lowest frame length among the rate series that will have a |
Felix Fietkau | aa5955c | 2012-07-15 19:53:36 +0200 | [diff] [blame] | 696 | * 4ms (or TXOP limited) transmit duration. |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 697 | */ |
| 698 | max_4ms_framelen = ATH_AMPDU_LIMIT_MAX; |
| 699 | |
| 700 | for (i = 0; i < 4; i++) { |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 701 | int modeidx; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 702 | |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 703 | if (!rates[i].count) |
| 704 | continue; |
Felix Fietkau | 0e668cd | 2010-04-19 19:57:32 +0200 | [diff] [blame] | 705 | |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 706 | if (!(rates[i].flags & IEEE80211_TX_RC_MCS)) { |
| 707 | legacy = 1; |
| 708 | break; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 709 | } |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 710 | |
| 711 | if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) |
| 712 | modeidx = MCS_HT40; |
| 713 | else |
| 714 | modeidx = MCS_HT20; |
| 715 | |
| 716 | if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI) |
| 717 | modeidx++; |
| 718 | |
Felix Fietkau | aa5955c | 2012-07-15 19:53:36 +0200 | [diff] [blame] | 719 | frmlen = sc->tx.max_aggr_framelen[q][modeidx][rates[i].idx]; |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 720 | max_4ms_framelen = min(max_4ms_framelen, frmlen); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 721 | } |
| 722 | |
| 723 | /* |
| 724 | * limit aggregate size by the minimum rate if rate selected is |
| 725 | * not a probe rate, if rate selected is a probe rate then |
| 726 | * avoid aggregation of this packet. |
| 727 | */ |
| 728 | if (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE || legacy) |
| 729 | return 0; |
| 730 | |
Sujith Manoharan | c0ac53f | 2012-02-22 12:40:38 +0530 | [diff] [blame] | 731 | aggr_limit = min(max_4ms_framelen, (u32)ATH_AMPDU_LIMIT_MAX); |
| 732 | |
| 733 | /* |
| 734 | * Override the default aggregation limit for BTCOEX. |
| 735 | */ |
| 736 | bt_aggr_limit = ath9k_btcoex_aggr_limit(sc, max_4ms_framelen); |
| 737 | if (bt_aggr_limit) |
| 738 | aggr_limit = bt_aggr_limit; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 739 | |
| 740 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 741 | * h/w can accept aggregates up to 16 bit lengths (65535). |
| 742 | * The IE, however can hold up to 65536, which shows up here |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 743 | * as zero. Ignore 65536 since we are constrained by hw. |
| 744 | */ |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 745 | if (tid->an->maxampdu) |
| 746 | aggr_limit = min(aggr_limit, tid->an->maxampdu); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 747 | |
| 748 | return aggr_limit; |
| 749 | } |
| 750 | |
| 751 | /* |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 752 | * Returns the number of delimiters to be added to |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 753 | * meet the minimum required mpdudensity. |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 754 | */ |
| 755 | static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid, |
Rajkumar Manoharan | 7a12dfd | 2011-08-13 10:28:08 +0530 | [diff] [blame] | 756 | struct ath_buf *bf, u16 frmlen, |
| 757 | bool first_subfrm) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 758 | { |
Rajkumar Manoharan | 7a12dfd | 2011-08-13 10:28:08 +0530 | [diff] [blame] | 759 | #define FIRST_DESC_NDELIMS 60 |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 760 | u32 nsymbits, nsymbols; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 761 | u16 minlen; |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 762 | u8 flags, rix; |
Felix Fietkau | c666387 | 2010-04-19 19:57:33 +0200 | [diff] [blame] | 763 | int width, streams, half_gi, ndelim, mindelim; |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 764 | struct ath_frame_info *fi = get_frame_info(bf->bf_mpdu); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 765 | |
| 766 | /* Select standard number of delimiters based on frame length alone */ |
| 767 | ndelim = ATH_AGGR_GET_NDELIM(frmlen); |
| 768 | |
| 769 | /* |
| 770 | * If encryption enabled, hardware requires some more padding between |
| 771 | * subframes. |
| 772 | * TODO - this could be improved to be dependent on the rate. |
| 773 | * The hardware can keep up at lower rates, but not higher rates |
| 774 | */ |
Rajkumar Manoharan | 4f6760b | 2011-07-01 18:37:33 +0530 | [diff] [blame] | 775 | if ((fi->keyix != ATH9K_TXKEYIX_INVALID) && |
| 776 | !(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 777 | ndelim += ATH_AGGR_ENCRYPTDELIM; |
| 778 | |
| 779 | /* |
Rajkumar Manoharan | 7a12dfd | 2011-08-13 10:28:08 +0530 | [diff] [blame] | 780 | * Add delimiter when using RTS/CTS with aggregation |
| 781 | * and non enterprise AR9003 card |
| 782 | */ |
Felix Fietkau | 3459731 | 2011-08-29 18:57:54 +0200 | [diff] [blame] | 783 | if (first_subfrm && !AR_SREV_9580_10_OR_LATER(sc->sc_ah) && |
| 784 | (sc->sc_ah->ent_mode & AR_ENT_OTP_MIN_PKT_SIZE_DISABLE)) |
Rajkumar Manoharan | 7a12dfd | 2011-08-13 10:28:08 +0530 | [diff] [blame] | 785 | ndelim = max(ndelim, FIRST_DESC_NDELIMS); |
| 786 | |
| 787 | /* |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 788 | * Convert desired mpdu density from microeconds to bytes based |
| 789 | * on highest rate in rate series (i.e. first rate) to determine |
| 790 | * required minimum length for subframe. Take into account |
| 791 | * whether high rate is 20 or 40Mhz and half or full GI. |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 792 | * |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 793 | * If there is no mpdu density restriction, no further calculation |
| 794 | * is needed. |
| 795 | */ |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 796 | |
| 797 | if (tid->an->mpdudensity == 0) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 798 | return ndelim; |
| 799 | |
Felix Fietkau | 79acac0 | 2013-04-22 23:11:44 +0200 | [diff] [blame] | 800 | rix = bf->rates[0].idx; |
| 801 | flags = bf->rates[0].flags; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 802 | width = (flags & IEEE80211_TX_RC_40_MHZ_WIDTH) ? 1 : 0; |
| 803 | half_gi = (flags & IEEE80211_TX_RC_SHORT_GI) ? 1 : 0; |
| 804 | |
| 805 | if (half_gi) |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 806 | nsymbols = NUM_SYMBOLS_PER_USEC_HALFGI(tid->an->mpdudensity); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 807 | else |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 808 | nsymbols = NUM_SYMBOLS_PER_USEC(tid->an->mpdudensity); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 809 | |
| 810 | if (nsymbols == 0) |
| 811 | nsymbols = 1; |
| 812 | |
Felix Fietkau | c666387 | 2010-04-19 19:57:33 +0200 | [diff] [blame] | 813 | streams = HT_RC_2_STREAMS(rix); |
| 814 | nsymbits = bits_per_symbol[rix % 8][width] * streams; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 815 | minlen = (nsymbols * nsymbits) / BITS_PER_BYTE; |
| 816 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 817 | if (frmlen < minlen) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 818 | mindelim = (minlen - frmlen) / ATH_AGGR_DELIM_SZ; |
| 819 | ndelim = max(mindelim, ndelim); |
| 820 | } |
| 821 | |
| 822 | return ndelim; |
| 823 | } |
| 824 | |
| 825 | static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc, |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 826 | struct ath_txq *txq, |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 827 | struct ath_atx_tid *tid, |
Felix Fietkau | 269c44b | 2010-11-14 15:20:06 +0100 | [diff] [blame] | 828 | struct list_head *bf_q, |
| 829 | int *aggr_len) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 830 | { |
| 831 | #define PADBYTES(_len) ((4 - ((_len) % 4)) % 4) |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 832 | struct ath_buf *bf, *bf_first = NULL, *bf_prev = NULL; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 833 | int rl = 0, nframes = 0, ndelim, prev_al = 0; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 834 | u16 aggr_limit = 0, al = 0, bpad = 0, |
| 835 | al_delta, h_baw = tid->baw_size / 2; |
| 836 | enum ATH_AGGR_STATUS status = ATH_AGGR_DONE; |
Felix Fietkau | 0299a50 | 2010-10-21 02:47:24 +0200 | [diff] [blame] | 837 | struct ieee80211_tx_info *tx_info; |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 838 | struct ath_frame_info *fi; |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 839 | struct sk_buff *skb; |
Felix Fietkau | 6a0ddae | 2011-08-28 00:32:23 +0200 | [diff] [blame] | 840 | u16 seqno; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 841 | |
| 842 | do { |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 843 | skb = skb_peek(&tid->buf_q); |
| 844 | fi = get_frame_info(skb); |
| 845 | bf = fi->bf; |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 846 | if (!fi->bf) |
Felix Fietkau | 249ee72 | 2012-10-03 21:07:52 +0200 | [diff] [blame] | 847 | bf = ath_tx_setup_buffer(sc, txq, tid, skb); |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 848 | |
Felix Fietkau | 249ee72 | 2012-10-03 21:07:52 +0200 | [diff] [blame] | 849 | if (!bf) { |
| 850 | __skb_unlink(skb, &tid->buf_q); |
| 851 | ieee80211_free_txskb(sc->hw, skb); |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 852 | continue; |
Felix Fietkau | 249ee72 | 2012-10-03 21:07:52 +0200 | [diff] [blame] | 853 | } |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 854 | |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 855 | bf->bf_state.bf_type = BUF_AMPDU | BUF_AGGR; |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 856 | seqno = bf->bf_state.seqno; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 857 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 858 | /* do not step over block-ack window */ |
Felix Fietkau | 6a0ddae | 2011-08-28 00:32:23 +0200 | [diff] [blame] | 859 | if (!BAW_WITHIN(tid->seq_start, tid->baw_size, seqno)) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 860 | status = ATH_AGGR_BAW_CLOSED; |
| 861 | break; |
| 862 | } |
| 863 | |
Felix Fietkau | f943754 | 2011-12-14 22:08:08 +0100 | [diff] [blame] | 864 | if (tid->bar_index > ATH_BA_INDEX(tid->seq_start, seqno)) { |
| 865 | struct ath_tx_status ts = {}; |
| 866 | struct list_head bf_head; |
| 867 | |
| 868 | INIT_LIST_HEAD(&bf_head); |
| 869 | list_add(&bf->list, &bf_head); |
| 870 | __skb_unlink(skb, &tid->buf_q); |
| 871 | ath_tx_update_baw(sc, tid, seqno); |
| 872 | ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0); |
| 873 | continue; |
| 874 | } |
| 875 | |
| 876 | if (!bf_first) |
| 877 | bf_first = bf; |
| 878 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 879 | if (!rl) { |
Felix Fietkau | 79acac0 | 2013-04-22 23:11:44 +0200 | [diff] [blame] | 880 | ath_set_rates(tid->an->vif, tid->an->sta, bf); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 881 | aggr_limit = ath_lookup_rate(sc, bf, tid); |
| 882 | rl = 1; |
| 883 | } |
| 884 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 885 | /* do not exceed aggregation limit */ |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 886 | al_delta = ATH_AGGR_DELIM_SZ + fi->framelen; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 887 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 888 | if (nframes && |
Rajkumar Manoharan | 1a6e9d0 | 2011-08-23 12:32:57 +0530 | [diff] [blame] | 889 | ((aggr_limit < (al + bpad + al_delta + prev_al)) || |
| 890 | ath_lookup_legacy(bf))) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 891 | status = ATH_AGGR_LIMITED; |
| 892 | break; |
| 893 | } |
| 894 | |
Felix Fietkau | 0299a50 | 2010-10-21 02:47:24 +0200 | [diff] [blame] | 895 | tx_info = IEEE80211_SKB_CB(bf->bf_mpdu); |
Felix Fietkau | bdf2dbf | 2011-09-14 21:24:25 +0200 | [diff] [blame] | 896 | if (nframes && (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)) |
Felix Fietkau | 0299a50 | 2010-10-21 02:47:24 +0200 | [diff] [blame] | 897 | break; |
| 898 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 899 | /* do not exceed subframe limit */ |
| 900 | if (nframes >= min((int)h_baw, ATH_AMPDU_SUBFRAME_DEFAULT)) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 901 | status = ATH_AGGR_LIMITED; |
| 902 | break; |
| 903 | } |
| 904 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 905 | /* add padding for previous frame to aggregation length */ |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 906 | al += bpad + al_delta; |
| 907 | |
| 908 | /* |
| 909 | * Get the delimiters needed to meet the MPDU |
| 910 | * density for this node. |
| 911 | */ |
Rajkumar Manoharan | 7a12dfd | 2011-08-13 10:28:08 +0530 | [diff] [blame] | 912 | ndelim = ath_compute_num_delims(sc, tid, bf_first, fi->framelen, |
| 913 | !nframes); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 914 | bpad = PADBYTES(al_delta) + (ndelim << 2); |
| 915 | |
Rajkumar Manoharan | 7a12dfd | 2011-08-13 10:28:08 +0530 | [diff] [blame] | 916 | nframes++; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 917 | bf->bf_next = NULL; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 918 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 919 | /* link buffers of this frame to the aggregate */ |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 920 | if (!fi->retries) |
Felix Fietkau | 6a0ddae | 2011-08-28 00:32:23 +0200 | [diff] [blame] | 921 | ath_tx_addto_baw(sc, tid, seqno); |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 922 | bf->bf_state.ndelim = ndelim; |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 923 | |
| 924 | __skb_unlink(skb, &tid->buf_q); |
| 925 | list_add_tail(&bf->list, bf_q); |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 926 | if (bf_prev) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 927 | bf_prev->bf_next = bf; |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 928 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 929 | bf_prev = bf; |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 930 | |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 931 | } while (!skb_queue_empty(&tid->buf_q)); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 932 | |
Felix Fietkau | 269c44b | 2010-11-14 15:20:06 +0100 | [diff] [blame] | 933 | *aggr_len = al; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 934 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 935 | return status; |
| 936 | #undef PADBYTES |
| 937 | } |
| 938 | |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 939 | /* |
| 940 | * rix - rate index |
| 941 | * pktlen - total bytes (delims + data + fcs + pads + pad delims) |
| 942 | * width - 0 for 20 MHz, 1 for 40 MHz |
| 943 | * half_gi - to use 4us v/s 3.6 us for symbol time |
| 944 | */ |
| 945 | static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, int pktlen, |
| 946 | int width, int half_gi, bool shortPreamble) |
| 947 | { |
| 948 | u32 nbits, nsymbits, duration, nsymbols; |
| 949 | int streams; |
| 950 | |
| 951 | /* find number of symbols: PLCP + data */ |
| 952 | streams = HT_RC_2_STREAMS(rix); |
| 953 | nbits = (pktlen << 3) + OFDM_PLCP_BITS; |
| 954 | nsymbits = bits_per_symbol[rix % 8][width] * streams; |
| 955 | nsymbols = (nbits + nsymbits - 1) / nsymbits; |
| 956 | |
| 957 | if (!half_gi) |
| 958 | duration = SYMBOL_TIME(nsymbols); |
| 959 | else |
| 960 | duration = SYMBOL_TIME_HALFGI(nsymbols); |
| 961 | |
| 962 | /* addup duration for legacy/ht training and signal fields */ |
| 963 | duration += L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams); |
| 964 | |
| 965 | return duration; |
| 966 | } |
| 967 | |
Felix Fietkau | aa5955c | 2012-07-15 19:53:36 +0200 | [diff] [blame] | 968 | static int ath_max_framelen(int usec, int mcs, bool ht40, bool sgi) |
| 969 | { |
| 970 | int streams = HT_RC_2_STREAMS(mcs); |
| 971 | int symbols, bits; |
| 972 | int bytes = 0; |
| 973 | |
| 974 | symbols = sgi ? TIME_SYMBOLS_HALFGI(usec) : TIME_SYMBOLS(usec); |
| 975 | bits = symbols * bits_per_symbol[mcs % 8][ht40] * streams; |
| 976 | bits -= OFDM_PLCP_BITS; |
| 977 | bytes = bits / 8; |
| 978 | bytes -= L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams); |
| 979 | if (bytes > 65532) |
| 980 | bytes = 65532; |
| 981 | |
| 982 | return bytes; |
| 983 | } |
| 984 | |
| 985 | void ath_update_max_aggr_framelen(struct ath_softc *sc, int queue, int txop) |
| 986 | { |
| 987 | u16 *cur_ht20, *cur_ht20_sgi, *cur_ht40, *cur_ht40_sgi; |
| 988 | int mcs; |
| 989 | |
| 990 | /* 4ms is the default (and maximum) duration */ |
| 991 | if (!txop || txop > 4096) |
| 992 | txop = 4096; |
| 993 | |
| 994 | cur_ht20 = sc->tx.max_aggr_framelen[queue][MCS_HT20]; |
| 995 | cur_ht20_sgi = sc->tx.max_aggr_framelen[queue][MCS_HT20_SGI]; |
| 996 | cur_ht40 = sc->tx.max_aggr_framelen[queue][MCS_HT40]; |
| 997 | cur_ht40_sgi = sc->tx.max_aggr_framelen[queue][MCS_HT40_SGI]; |
| 998 | for (mcs = 0; mcs < 32; mcs++) { |
| 999 | cur_ht20[mcs] = ath_max_framelen(txop, mcs, false, false); |
| 1000 | cur_ht20_sgi[mcs] = ath_max_framelen(txop, mcs, false, true); |
| 1001 | cur_ht40[mcs] = ath_max_framelen(txop, mcs, true, false); |
| 1002 | cur_ht40_sgi[mcs] = ath_max_framelen(txop, mcs, true, true); |
| 1003 | } |
| 1004 | } |
| 1005 | |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1006 | static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf, |
| 1007 | struct ath_tx_info *info, int len) |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1008 | { |
| 1009 | struct ath_hw *ah = sc->sc_ah; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1010 | struct sk_buff *skb; |
| 1011 | struct ieee80211_tx_info *tx_info; |
| 1012 | struct ieee80211_tx_rate *rates; |
| 1013 | const struct ieee80211_rate *rate; |
| 1014 | struct ieee80211_hdr *hdr; |
Felix Fietkau | 80b08a8 | 2012-06-15 03:04:53 +0200 | [diff] [blame] | 1015 | struct ath_frame_info *fi = get_frame_info(bf->bf_mpdu); |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1016 | int i; |
| 1017 | u8 rix = 0; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1018 | |
| 1019 | skb = bf->bf_mpdu; |
| 1020 | tx_info = IEEE80211_SKB_CB(skb); |
Felix Fietkau | 79acac0 | 2013-04-22 23:11:44 +0200 | [diff] [blame] | 1021 | rates = bf->rates; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1022 | hdr = (struct ieee80211_hdr *)skb->data; |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1023 | |
| 1024 | /* set dur_update_en for l-sig computation except for PS-Poll frames */ |
| 1025 | info->dur_update = !ieee80211_is_pspoll(hdr->frame_control); |
Felix Fietkau | 80b08a8 | 2012-06-15 03:04:53 +0200 | [diff] [blame] | 1026 | info->rtscts_rate = fi->rtscts_rate; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1027 | |
Felix Fietkau | 79acac0 | 2013-04-22 23:11:44 +0200 | [diff] [blame] | 1028 | for (i = 0; i < ARRAY_SIZE(bf->rates); i++) { |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1029 | bool is_40, is_sgi, is_sp; |
| 1030 | int phy; |
| 1031 | |
| 1032 | if (!rates[i].count || (rates[i].idx < 0)) |
| 1033 | continue; |
| 1034 | |
| 1035 | rix = rates[i].idx; |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1036 | info->rates[i].Tries = rates[i].count; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1037 | |
| 1038 | if (rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) { |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1039 | info->rates[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; |
| 1040 | info->flags |= ATH9K_TXDESC_RTSENA; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1041 | } else if (rates[i].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1042 | info->rates[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; |
| 1043 | info->flags |= ATH9K_TXDESC_CTSENA; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1044 | } |
| 1045 | |
| 1046 | if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1047 | info->rates[i].RateFlags |= ATH9K_RATESERIES_2040; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1048 | if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI) |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1049 | info->rates[i].RateFlags |= ATH9K_RATESERIES_HALFGI; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1050 | |
| 1051 | is_sgi = !!(rates[i].flags & IEEE80211_TX_RC_SHORT_GI); |
| 1052 | is_40 = !!(rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH); |
| 1053 | is_sp = !!(rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE); |
| 1054 | |
| 1055 | if (rates[i].flags & IEEE80211_TX_RC_MCS) { |
| 1056 | /* MCS rates */ |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1057 | info->rates[i].Rate = rix | 0x80; |
| 1058 | info->rates[i].ChSel = ath_txchainmask_reduction(sc, |
| 1059 | ah->txchainmask, info->rates[i].Rate); |
| 1060 | info->rates[i].PktDuration = ath_pkt_duration(sc, rix, len, |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1061 | is_40, is_sgi, is_sp); |
| 1062 | if (rix < 8 && (tx_info->flags & IEEE80211_TX_CTL_STBC)) |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1063 | info->rates[i].RateFlags |= ATH9K_RATESERIES_STBC; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1064 | continue; |
| 1065 | } |
| 1066 | |
| 1067 | /* legacy rates */ |
Felix Fietkau | 76591be | 2012-06-15 03:04:52 +0200 | [diff] [blame] | 1068 | rate = &sc->sbands[tx_info->band].bitrates[rates[i].idx]; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1069 | if ((tx_info->band == IEEE80211_BAND_2GHZ) && |
| 1070 | !(rate->flags & IEEE80211_RATE_ERP_G)) |
| 1071 | phy = WLAN_RC_PHY_CCK; |
| 1072 | else |
| 1073 | phy = WLAN_RC_PHY_OFDM; |
| 1074 | |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1075 | info->rates[i].Rate = rate->hw_value; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1076 | if (rate->hw_value_short) { |
| 1077 | if (rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1078 | info->rates[i].Rate |= rate->hw_value_short; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1079 | } else { |
| 1080 | is_sp = false; |
| 1081 | } |
| 1082 | |
| 1083 | if (bf->bf_state.bfs_paprd) |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1084 | info->rates[i].ChSel = ah->txchainmask; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1085 | else |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1086 | info->rates[i].ChSel = ath_txchainmask_reduction(sc, |
| 1087 | ah->txchainmask, info->rates[i].Rate); |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1088 | |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1089 | info->rates[i].PktDuration = ath9k_hw_computetxtime(sc->sc_ah, |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1090 | phy, rate->bitrate * 100, len, rix, is_sp); |
| 1091 | } |
| 1092 | |
| 1093 | /* For AR5416 - RTS cannot be followed by a frame larger than 8K */ |
| 1094 | if (bf_isaggr(bf) && (len > sc->sc_ah->caps.rts_aggr_limit)) |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1095 | info->flags &= ~ATH9K_TXDESC_RTSENA; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1096 | |
| 1097 | /* ATH9K_TXDESC_RTSENA and ATH9K_TXDESC_CTSENA are mutually exclusive. */ |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1098 | if (info->flags & ATH9K_TXDESC_RTSENA) |
| 1099 | info->flags &= ~ATH9K_TXDESC_CTSENA; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1100 | } |
| 1101 | |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1102 | static enum ath9k_pkt_type get_hw_packet_type(struct sk_buff *skb) |
| 1103 | { |
| 1104 | struct ieee80211_hdr *hdr; |
| 1105 | enum ath9k_pkt_type htype; |
| 1106 | __le16 fc; |
| 1107 | |
| 1108 | hdr = (struct ieee80211_hdr *)skb->data; |
| 1109 | fc = hdr->frame_control; |
| 1110 | |
| 1111 | if (ieee80211_is_beacon(fc)) |
| 1112 | htype = ATH9K_PKT_TYPE_BEACON; |
| 1113 | else if (ieee80211_is_probe_resp(fc)) |
| 1114 | htype = ATH9K_PKT_TYPE_PROBE_RESP; |
| 1115 | else if (ieee80211_is_atim(fc)) |
| 1116 | htype = ATH9K_PKT_TYPE_ATIM; |
| 1117 | else if (ieee80211_is_pspoll(fc)) |
| 1118 | htype = ATH9K_PKT_TYPE_PSPOLL; |
| 1119 | else |
| 1120 | htype = ATH9K_PKT_TYPE_NORMAL; |
| 1121 | |
| 1122 | return htype; |
| 1123 | } |
| 1124 | |
| 1125 | static void ath_tx_fill_desc(struct ath_softc *sc, struct ath_buf *bf, |
| 1126 | struct ath_txq *txq, int len) |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1127 | { |
| 1128 | struct ath_hw *ah = sc->sc_ah; |
| 1129 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(bf->bf_mpdu); |
| 1130 | struct ath_buf *bf_first = bf; |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1131 | struct ath_tx_info info; |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1132 | bool aggr = !!(bf->bf_state.bf_type & BUF_AGGR); |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1133 | |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1134 | memset(&info, 0, sizeof(info)); |
| 1135 | info.is_first = true; |
| 1136 | info.is_last = true; |
| 1137 | info.txpower = MAX_RATE_POWER; |
| 1138 | info.qcu = txq->axq_qnum; |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1139 | |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1140 | info.flags = ATH9K_TXDESC_INTREQ; |
| 1141 | if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK) |
| 1142 | info.flags |= ATH9K_TXDESC_NOACK; |
| 1143 | if (tx_info->flags & IEEE80211_TX_CTL_LDPC) |
| 1144 | info.flags |= ATH9K_TXDESC_LDPC; |
| 1145 | |
| 1146 | ath_buf_set_rate(sc, bf, &info, len); |
| 1147 | |
| 1148 | if (tx_info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT) |
| 1149 | info.flags |= ATH9K_TXDESC_CLRDMASK; |
| 1150 | |
| 1151 | if (bf->bf_state.bfs_paprd) |
| 1152 | info.flags |= (u32) bf->bf_state.bfs_paprd << ATH9K_TXDESC_PAPRD_S; |
| 1153 | |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1154 | |
| 1155 | while (bf) { |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1156 | struct sk_buff *skb = bf->bf_mpdu; |
| 1157 | struct ath_frame_info *fi = get_frame_info(skb); |
| 1158 | |
| 1159 | info.type = get_hw_packet_type(skb); |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1160 | if (bf->bf_next) |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1161 | info.link = bf->bf_next->bf_daddr; |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1162 | else |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1163 | info.link = 0; |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1164 | |
John W. Linville | 42cecc3 | 2011-09-19 15:42:31 -0400 | [diff] [blame] | 1165 | info.buf_addr[0] = bf->bf_buf_addr; |
| 1166 | info.buf_len[0] = skb->len; |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1167 | info.pkt_len = fi->framelen; |
| 1168 | info.keyix = fi->keyix; |
| 1169 | info.keytype = fi->keytype; |
| 1170 | |
| 1171 | if (aggr) { |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1172 | if (bf == bf_first) |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1173 | info.aggr = AGGR_BUF_FIRST; |
| 1174 | else if (!bf->bf_next) |
| 1175 | info.aggr = AGGR_BUF_LAST; |
| 1176 | else |
| 1177 | info.aggr = AGGR_BUF_MIDDLE; |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1178 | |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1179 | info.ndelim = bf->bf_state.ndelim; |
| 1180 | info.aggr_len = len; |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1181 | } |
| 1182 | |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1183 | ath9k_hw_set_txdesc(ah, bf->bf_desc, &info); |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1184 | bf = bf->bf_next; |
| 1185 | } |
| 1186 | } |
| 1187 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1188 | static void ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq, |
| 1189 | struct ath_atx_tid *tid) |
| 1190 | { |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 1191 | struct ath_buf *bf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1192 | enum ATH_AGGR_STATUS status; |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1193 | struct ieee80211_tx_info *tx_info; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1194 | struct list_head bf_q; |
Felix Fietkau | 269c44b | 2010-11-14 15:20:06 +0100 | [diff] [blame] | 1195 | int aggr_len; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1196 | |
| 1197 | do { |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 1198 | if (skb_queue_empty(&tid->buf_q)) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1199 | return; |
| 1200 | |
| 1201 | INIT_LIST_HEAD(&bf_q); |
| 1202 | |
Felix Fietkau | 269c44b | 2010-11-14 15:20:06 +0100 | [diff] [blame] | 1203 | status = ath_tx_form_aggr(sc, txq, tid, &bf_q, &aggr_len); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1204 | |
| 1205 | /* |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 1206 | * no frames picked up to be aggregated; |
| 1207 | * block-ack window is not open. |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1208 | */ |
| 1209 | if (list_empty(&bf_q)) |
| 1210 | break; |
| 1211 | |
| 1212 | bf = list_first_entry(&bf_q, struct ath_buf, list); |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 1213 | bf->bf_lastbf = list_entry(bf_q.prev, struct ath_buf, list); |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1214 | tx_info = IEEE80211_SKB_CB(bf->bf_mpdu); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1215 | |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1216 | if (tid->ac->clear_ps_filter) { |
| 1217 | tid->ac->clear_ps_filter = false; |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1218 | tx_info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
| 1219 | } else { |
| 1220 | tx_info->flags &= ~IEEE80211_TX_CTL_CLEAR_PS_FILT; |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1221 | } |
| 1222 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 1223 | /* if only one frame, send as non-aggregate */ |
Felix Fietkau | b572d03 | 2010-11-14 15:20:07 +0100 | [diff] [blame] | 1224 | if (bf == bf->bf_lastbf) { |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1225 | aggr_len = get_frame_info(bf->bf_mpdu)->framelen; |
| 1226 | bf->bf_state.bf_type = BUF_AMPDU; |
| 1227 | } else { |
| 1228 | TX_STAT_INC(txq->axq_qnum, a_aggr); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1229 | } |
| 1230 | |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1231 | ath_tx_fill_desc(sc, bf, txq, aggr_len); |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1232 | ath_tx_txqaddbuf(sc, txq, &bf_q, false); |
Felix Fietkau | 4b3ba66 | 2010-12-17 00:57:00 +0100 | [diff] [blame] | 1233 | } while (txq->axq_ampdu_depth < ATH_AGGR_MIN_QDEPTH && |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1234 | status != ATH_AGGR_BAW_CLOSED); |
| 1235 | } |
| 1236 | |
Felix Fietkau | 231c3a1 | 2010-09-20 19:35:28 +0200 | [diff] [blame] | 1237 | int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta, |
| 1238 | u16 tid, u16 *ssn) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1239 | { |
| 1240 | struct ath_atx_tid *txtid; |
| 1241 | struct ath_node *an; |
Sven Eckelmann | 313eb87 | 2012-06-25 07:15:22 +0200 | [diff] [blame] | 1242 | u8 density; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1243 | |
| 1244 | an = (struct ath_node *)sta->drv_priv; |
Sujith | f83da96 | 2009-07-23 15:32:37 +0530 | [diff] [blame] | 1245 | txtid = ATH_AN_2_TID(an, tid); |
Felix Fietkau | 231c3a1 | 2010-09-20 19:35:28 +0200 | [diff] [blame] | 1246 | |
| 1247 | if (txtid->state & (AGGR_CLEANUP | AGGR_ADDBA_COMPLETE)) |
| 1248 | return -EAGAIN; |
| 1249 | |
Sven Eckelmann | 313eb87 | 2012-06-25 07:15:22 +0200 | [diff] [blame] | 1250 | /* update ampdu factor/density, they may have changed. This may happen |
| 1251 | * in HT IBSS when a beacon with HT-info is received after the station |
| 1252 | * has already been added. |
| 1253 | */ |
Sujith Manoharan | dd5ee59 | 2013-02-04 15:38:23 +0530 | [diff] [blame] | 1254 | if (sta->ht_cap.ht_supported) { |
Sven Eckelmann | 313eb87 | 2012-06-25 07:15:22 +0200 | [diff] [blame] | 1255 | an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR + |
| 1256 | sta->ht_cap.ampdu_factor); |
| 1257 | density = ath9k_parse_mpdudensity(sta->ht_cap.ampdu_density); |
| 1258 | an->mpdudensity = density; |
| 1259 | } |
| 1260 | |
Sujith | f83da96 | 2009-07-23 15:32:37 +0530 | [diff] [blame] | 1261 | txtid->state |= AGGR_ADDBA_PROGRESS; |
Lorenzo Bianconi | 7540184 | 2010-08-01 15:47:32 +0200 | [diff] [blame] | 1262 | txtid->paused = true; |
Felix Fietkau | 49447f2 | 2011-01-10 17:05:48 -0700 | [diff] [blame] | 1263 | *ssn = txtid->seq_start = txtid->seq_next; |
Felix Fietkau | f943754 | 2011-12-14 22:08:08 +0100 | [diff] [blame] | 1264 | txtid->bar_index = -1; |
Felix Fietkau | 231c3a1 | 2010-09-20 19:35:28 +0200 | [diff] [blame] | 1265 | |
Felix Fietkau | 2ed7222 | 2011-01-10 17:05:49 -0700 | [diff] [blame] | 1266 | memset(txtid->tx_buf, 0, sizeof(txtid->tx_buf)); |
| 1267 | txtid->baw_head = txtid->baw_tail = 0; |
| 1268 | |
Felix Fietkau | 231c3a1 | 2010-09-20 19:35:28 +0200 | [diff] [blame] | 1269 | return 0; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1270 | } |
| 1271 | |
Felix Fietkau | 16e2342 | 2013-05-17 12:58:24 +0200 | [diff] [blame] | 1272 | bool ath_tx_aggr_stop(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid, |
| 1273 | bool flush) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1274 | { |
| 1275 | struct ath_node *an = (struct ath_node *)sta->drv_priv; |
| 1276 | struct ath_atx_tid *txtid = ATH_AN_2_TID(an, tid); |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 1277 | struct ath_txq *txq = txtid->ac->txq; |
Felix Fietkau | 16e2342 | 2013-05-17 12:58:24 +0200 | [diff] [blame] | 1278 | bool ret = !flush; |
| 1279 | |
| 1280 | if (flush) |
| 1281 | txtid->stop_cb = false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1282 | |
| 1283 | if (txtid->state & AGGR_CLEANUP) |
Felix Fietkau | 16e2342 | 2013-05-17 12:58:24 +0200 | [diff] [blame] | 1284 | return false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1285 | |
| 1286 | if (!(txtid->state & AGGR_ADDBA_COMPLETE)) { |
Vasanthakumar Thiagarajan | 5eae659 | 2009-06-09 15:28:21 +0530 | [diff] [blame] | 1287 | txtid->state &= ~AGGR_ADDBA_PROGRESS; |
Felix Fietkau | 16e2342 | 2013-05-17 12:58:24 +0200 | [diff] [blame] | 1288 | return ret; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1289 | } |
| 1290 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 1291 | ath_txq_lock(sc, txq); |
Lorenzo Bianconi | 7540184 | 2010-08-01 15:47:32 +0200 | [diff] [blame] | 1292 | txtid->paused = true; |
Felix Fietkau | 90fa539 | 2010-09-20 13:45:38 +0200 | [diff] [blame] | 1293 | |
| 1294 | /* |
| 1295 | * If frames are still being transmitted for this TID, they will be |
| 1296 | * cleaned up during tx completion. To prevent race conditions, this |
| 1297 | * TID can only be reused after all in-progress subframes have been |
| 1298 | * completed. |
| 1299 | */ |
Felix Fietkau | 16e2342 | 2013-05-17 12:58:24 +0200 | [diff] [blame] | 1300 | if (txtid->baw_head != txtid->baw_tail) { |
Felix Fietkau | 90fa539 | 2010-09-20 13:45:38 +0200 | [diff] [blame] | 1301 | txtid->state |= AGGR_CLEANUP; |
Felix Fietkau | 16e2342 | 2013-05-17 12:58:24 +0200 | [diff] [blame] | 1302 | ret = false; |
| 1303 | txtid->stop_cb = !flush; |
| 1304 | } else { |
Felix Fietkau | 90fa539 | 2010-09-20 13:45:38 +0200 | [diff] [blame] | 1305 | txtid->state &= ~AGGR_ADDBA_COMPLETE; |
Felix Fietkau | 16e2342 | 2013-05-17 12:58:24 +0200 | [diff] [blame] | 1306 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1307 | |
Felix Fietkau | 16e2342 | 2013-05-17 12:58:24 +0200 | [diff] [blame] | 1308 | ath_tx_flush_tid(sc, txtid, flush); |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 1309 | ath_txq_unlock_complete(sc, txq); |
Felix Fietkau | 16e2342 | 2013-05-17 12:58:24 +0200 | [diff] [blame] | 1310 | return ret; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1311 | } |
| 1312 | |
Johannes Berg | 042ec45 | 2011-09-29 16:04:26 +0200 | [diff] [blame] | 1313 | void ath_tx_aggr_sleep(struct ieee80211_sta *sta, struct ath_softc *sc, |
| 1314 | struct ath_node *an) |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1315 | { |
| 1316 | struct ath_atx_tid *tid; |
| 1317 | struct ath_atx_ac *ac; |
| 1318 | struct ath_txq *txq; |
Johannes Berg | 042ec45 | 2011-09-29 16:04:26 +0200 | [diff] [blame] | 1319 | bool buffered; |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1320 | int tidno; |
| 1321 | |
| 1322 | for (tidno = 0, tid = &an->tid[tidno]; |
Sujith Manoharan | de7b760 | 2012-11-28 15:08:53 +0530 | [diff] [blame] | 1323 | tidno < IEEE80211_NUM_TIDS; tidno++, tid++) { |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1324 | |
| 1325 | if (!tid->sched) |
| 1326 | continue; |
| 1327 | |
| 1328 | ac = tid->ac; |
| 1329 | txq = ac->txq; |
| 1330 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 1331 | ath_txq_lock(sc, txq); |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1332 | |
Johannes Berg | 042ec45 | 2011-09-29 16:04:26 +0200 | [diff] [blame] | 1333 | buffered = !skb_queue_empty(&tid->buf_q); |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1334 | |
| 1335 | tid->sched = false; |
| 1336 | list_del(&tid->list); |
| 1337 | |
| 1338 | if (ac->sched) { |
| 1339 | ac->sched = false; |
| 1340 | list_del(&ac->list); |
| 1341 | } |
| 1342 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 1343 | ath_txq_unlock(sc, txq); |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1344 | |
Johannes Berg | 042ec45 | 2011-09-29 16:04:26 +0200 | [diff] [blame] | 1345 | ieee80211_sta_set_buffered(sta, tidno, buffered); |
| 1346 | } |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1347 | } |
| 1348 | |
| 1349 | void ath_tx_aggr_wakeup(struct ath_softc *sc, struct ath_node *an) |
| 1350 | { |
| 1351 | struct ath_atx_tid *tid; |
| 1352 | struct ath_atx_ac *ac; |
| 1353 | struct ath_txq *txq; |
| 1354 | int tidno; |
| 1355 | |
| 1356 | for (tidno = 0, tid = &an->tid[tidno]; |
Sujith Manoharan | de7b760 | 2012-11-28 15:08:53 +0530 | [diff] [blame] | 1357 | tidno < IEEE80211_NUM_TIDS; tidno++, tid++) { |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1358 | |
| 1359 | ac = tid->ac; |
| 1360 | txq = ac->txq; |
| 1361 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 1362 | ath_txq_lock(sc, txq); |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1363 | ac->clear_ps_filter = true; |
| 1364 | |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 1365 | if (!skb_queue_empty(&tid->buf_q) && !tid->paused) { |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1366 | ath_tx_queue_tid(txq, tid); |
| 1367 | ath_txq_schedule(sc, txq); |
| 1368 | } |
| 1369 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 1370 | ath_txq_unlock_complete(sc, txq); |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1371 | } |
| 1372 | } |
| 1373 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1374 | void ath_tx_aggr_resume(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid) |
| 1375 | { |
| 1376 | struct ath_atx_tid *txtid; |
| 1377 | struct ath_node *an; |
| 1378 | |
| 1379 | an = (struct ath_node *)sta->drv_priv; |
| 1380 | |
Sujith Manoharan | 3d4e20f | 2012-03-14 14:40:58 +0530 | [diff] [blame] | 1381 | txtid = ATH_AN_2_TID(an, tid); |
| 1382 | txtid->baw_size = IEEE80211_MIN_AMPDU_BUF << sta->ht_cap.ampdu_factor; |
| 1383 | txtid->state |= AGGR_ADDBA_COMPLETE; |
| 1384 | txtid->state &= ~AGGR_ADDBA_PROGRESS; |
| 1385 | ath_tx_resume_tid(sc, txtid); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1386 | } |
| 1387 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1388 | /********************/ |
| 1389 | /* Queue Management */ |
| 1390 | /********************/ |
| 1391 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1392 | struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype) |
| 1393 | { |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 1394 | struct ath_hw *ah = sc->sc_ah; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1395 | struct ath9k_tx_queue_info qi; |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 1396 | static const int subtype_txq_to_hwq[] = { |
Sujith Manoharan | bea843c | 2012-11-21 18:13:10 +0530 | [diff] [blame] | 1397 | [IEEE80211_AC_BE] = ATH_TXQ_AC_BE, |
| 1398 | [IEEE80211_AC_BK] = ATH_TXQ_AC_BK, |
| 1399 | [IEEE80211_AC_VI] = ATH_TXQ_AC_VI, |
| 1400 | [IEEE80211_AC_VO] = ATH_TXQ_AC_VO, |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 1401 | }; |
Ben Greear | 60f2d1d | 2011-01-09 23:11:52 -0800 | [diff] [blame] | 1402 | int axq_qnum, i; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1403 | |
| 1404 | memset(&qi, 0, sizeof(qi)); |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 1405 | qi.tqi_subtype = subtype_txq_to_hwq[subtype]; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1406 | qi.tqi_aifs = ATH9K_TXQ_USEDEFAULT; |
| 1407 | qi.tqi_cwmin = ATH9K_TXQ_USEDEFAULT; |
| 1408 | qi.tqi_cwmax = ATH9K_TXQ_USEDEFAULT; |
| 1409 | qi.tqi_physCompBuf = 0; |
| 1410 | |
| 1411 | /* |
| 1412 | * Enable interrupts only for EOL and DESC conditions. |
| 1413 | * We mark tx descriptors to receive a DESC interrupt |
| 1414 | * when a tx queue gets deep; otherwise waiting for the |
| 1415 | * EOL to reap descriptors. Note that this is done to |
| 1416 | * reduce interrupt load and this only defers reaping |
| 1417 | * descriptors, never transmitting frames. Aside from |
| 1418 | * reducing interrupts this also permits more concurrency. |
| 1419 | * The only potential downside is if the tx queue backs |
| 1420 | * up in which case the top half of the kernel may backup |
| 1421 | * due to a lack of tx descriptors. |
| 1422 | * |
| 1423 | * The UAPSD queue is an exception, since we take a desc- |
| 1424 | * based intr on the EOSP frames. |
| 1425 | */ |
Vasanthakumar Thiagarajan | afe754d | 2010-04-15 17:39:40 -0400 | [diff] [blame] | 1426 | if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
Felix Fietkau | ce8fdf6 | 2012-03-14 16:40:22 +0100 | [diff] [blame] | 1427 | qi.tqi_qflags = TXQ_FLAG_TXINT_ENABLE; |
Vasanthakumar Thiagarajan | afe754d | 2010-04-15 17:39:40 -0400 | [diff] [blame] | 1428 | } else { |
| 1429 | if (qtype == ATH9K_TX_QUEUE_UAPSD) |
| 1430 | qi.tqi_qflags = TXQ_FLAG_TXDESCINT_ENABLE; |
| 1431 | else |
| 1432 | qi.tqi_qflags = TXQ_FLAG_TXEOLINT_ENABLE | |
| 1433 | TXQ_FLAG_TXDESCINT_ENABLE; |
| 1434 | } |
Ben Greear | 60f2d1d | 2011-01-09 23:11:52 -0800 | [diff] [blame] | 1435 | axq_qnum = ath9k_hw_setuptxqueue(ah, qtype, &qi); |
| 1436 | if (axq_qnum == -1) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1437 | /* |
| 1438 | * NB: don't print a message, this happens |
| 1439 | * normally on parts with too few tx queues |
| 1440 | */ |
| 1441 | return NULL; |
| 1442 | } |
Ben Greear | 60f2d1d | 2011-01-09 23:11:52 -0800 | [diff] [blame] | 1443 | if (!ATH_TXQ_SETUP(sc, axq_qnum)) { |
| 1444 | struct ath_txq *txq = &sc->tx.txq[axq_qnum]; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1445 | |
Ben Greear | 60f2d1d | 2011-01-09 23:11:52 -0800 | [diff] [blame] | 1446 | txq->axq_qnum = axq_qnum; |
| 1447 | txq->mac80211_qnum = -1; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1448 | txq->axq_link = NULL; |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 1449 | __skb_queue_head_init(&txq->complete_q); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1450 | INIT_LIST_HEAD(&txq->axq_q); |
| 1451 | INIT_LIST_HEAD(&txq->axq_acq); |
| 1452 | spin_lock_init(&txq->axq_lock); |
| 1453 | txq->axq_depth = 0; |
Felix Fietkau | 4b3ba66 | 2010-12-17 00:57:00 +0100 | [diff] [blame] | 1454 | txq->axq_ampdu_depth = 0; |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 1455 | txq->axq_tx_inprogress = false; |
Ben Greear | 60f2d1d | 2011-01-09 23:11:52 -0800 | [diff] [blame] | 1456 | sc->tx.txqsetup |= 1<<axq_qnum; |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 1457 | |
| 1458 | txq->txq_headidx = txq->txq_tailidx = 0; |
| 1459 | for (i = 0; i < ATH_TXFIFO_DEPTH; i++) |
| 1460 | INIT_LIST_HEAD(&txq->txq_fifo[i]); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1461 | } |
Ben Greear | 60f2d1d | 2011-01-09 23:11:52 -0800 | [diff] [blame] | 1462 | return &sc->tx.txq[axq_qnum]; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1463 | } |
| 1464 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1465 | int ath_txq_update(struct ath_softc *sc, int qnum, |
| 1466 | struct ath9k_tx_queue_info *qinfo) |
| 1467 | { |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 1468 | struct ath_hw *ah = sc->sc_ah; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1469 | int error = 0; |
| 1470 | struct ath9k_tx_queue_info qi; |
| 1471 | |
Luis R. Rodriguez | 9680e8a | 2009-09-13 23:28:00 -0700 | [diff] [blame] | 1472 | BUG_ON(sc->tx.txq[qnum].axq_qnum != qnum); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1473 | |
| 1474 | ath9k_hw_get_txq_props(ah, qnum, &qi); |
| 1475 | qi.tqi_aifs = qinfo->tqi_aifs; |
| 1476 | qi.tqi_cwmin = qinfo->tqi_cwmin; |
| 1477 | qi.tqi_cwmax = qinfo->tqi_cwmax; |
| 1478 | qi.tqi_burstTime = qinfo->tqi_burstTime; |
| 1479 | qi.tqi_readyTime = qinfo->tqi_readyTime; |
| 1480 | |
| 1481 | if (!ath9k_hw_set_txq_props(ah, qnum, &qi)) { |
Joe Perches | 3800276 | 2010-12-02 19:12:36 -0800 | [diff] [blame] | 1482 | ath_err(ath9k_hw_common(sc->sc_ah), |
| 1483 | "Unable to update hardware queue %u!\n", qnum); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1484 | error = -EIO; |
| 1485 | } else { |
| 1486 | ath9k_hw_resettxqueue(ah, qnum); |
| 1487 | } |
| 1488 | |
| 1489 | return error; |
| 1490 | } |
| 1491 | |
| 1492 | int ath_cabq_update(struct ath_softc *sc) |
| 1493 | { |
| 1494 | struct ath9k_tx_queue_info qi; |
Steve Brown | 9814f6b | 2011-02-07 17:10:39 -0700 | [diff] [blame] | 1495 | struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1496 | int qnum = sc->beacon.cabq->axq_qnum; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1497 | |
| 1498 | ath9k_hw_get_txq_props(sc->sc_ah, qnum, &qi); |
| 1499 | /* |
| 1500 | * Ensure the readytime % is within the bounds. |
| 1501 | */ |
Sujith | 17d7904 | 2009-02-09 13:27:03 +0530 | [diff] [blame] | 1502 | if (sc->config.cabqReadytime < ATH9K_READY_TIME_LO_BOUND) |
| 1503 | sc->config.cabqReadytime = ATH9K_READY_TIME_LO_BOUND; |
| 1504 | else if (sc->config.cabqReadytime > ATH9K_READY_TIME_HI_BOUND) |
| 1505 | sc->config.cabqReadytime = ATH9K_READY_TIME_HI_BOUND; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1506 | |
Steve Brown | 9814f6b | 2011-02-07 17:10:39 -0700 | [diff] [blame] | 1507 | qi.tqi_readyTime = (cur_conf->beacon_interval * |
Sujith | fdbf733 | 2009-02-17 15:36:35 +0530 | [diff] [blame] | 1508 | sc->config.cabqReadytime) / 100; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1509 | ath_txq_update(sc, qnum, &qi); |
| 1510 | |
| 1511 | return 0; |
| 1512 | } |
| 1513 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1514 | static void ath_drain_txq_list(struct ath_softc *sc, struct ath_txq *txq, |
Felix Fietkau | 1381559 | 2013-01-20 18:51:53 +0100 | [diff] [blame] | 1515 | struct list_head *list) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1516 | { |
| 1517 | struct ath_buf *bf, *lastbf; |
| 1518 | struct list_head bf_head; |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 1519 | struct ath_tx_status ts; |
| 1520 | |
| 1521 | memset(&ts, 0, sizeof(ts)); |
Felix Fietkau | daa5c40 | 2011-10-07 02:28:15 +0200 | [diff] [blame] | 1522 | ts.ts_status = ATH9K_TX_FLUSH; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1523 | INIT_LIST_HEAD(&bf_head); |
| 1524 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1525 | while (!list_empty(list)) { |
| 1526 | bf = list_first_entry(list, struct ath_buf, list); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1527 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1528 | if (bf->bf_stale) { |
| 1529 | list_del(&bf->list); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1530 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1531 | ath_tx_return_buffer(sc, bf); |
| 1532 | continue; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1533 | } |
| 1534 | |
| 1535 | lastbf = bf->bf_lastbf; |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1536 | list_cut_position(&bf_head, list, &lastbf->list); |
Felix Fietkau | 81b5195 | 2013-01-20 18:51:54 +0100 | [diff] [blame] | 1537 | ath_tx_process_buffer(sc, txq, &ts, bf, &bf_head); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 1538 | } |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1539 | } |
| 1540 | |
| 1541 | /* |
| 1542 | * Drain a given TX queue (could be Beacon or Data) |
| 1543 | * |
| 1544 | * This assumes output has been stopped and |
| 1545 | * we do not need to block ath_tx_tasklet. |
| 1546 | */ |
Felix Fietkau | 1381559 | 2013-01-20 18:51:53 +0100 | [diff] [blame] | 1547 | void ath_draintxq(struct ath_softc *sc, struct ath_txq *txq) |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1548 | { |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 1549 | ath_txq_lock(sc, txq); |
| 1550 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1551 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
| 1552 | int idx = txq->txq_tailidx; |
| 1553 | |
| 1554 | while (!list_empty(&txq->txq_fifo[idx])) { |
Felix Fietkau | 1381559 | 2013-01-20 18:51:53 +0100 | [diff] [blame] | 1555 | ath_drain_txq_list(sc, txq, &txq->txq_fifo[idx]); |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1556 | |
| 1557 | INCR(idx, ATH_TXFIFO_DEPTH); |
| 1558 | } |
| 1559 | txq->txq_tailidx = idx; |
| 1560 | } |
| 1561 | |
| 1562 | txq->axq_link = NULL; |
| 1563 | txq->axq_tx_inprogress = false; |
Felix Fietkau | 1381559 | 2013-01-20 18:51:53 +0100 | [diff] [blame] | 1564 | ath_drain_txq_list(sc, txq, &txq->axq_q); |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1565 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 1566 | ath_txq_unlock_complete(sc, txq); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1567 | } |
| 1568 | |
Felix Fietkau | 1381559 | 2013-01-20 18:51:53 +0100 | [diff] [blame] | 1569 | bool ath_drain_all_txq(struct ath_softc *sc) |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1570 | { |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 1571 | struct ath_hw *ah = sc->sc_ah; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1572 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1573 | struct ath_txq *txq; |
Felix Fietkau | 34d2581 | 2011-10-07 02:28:12 +0200 | [diff] [blame] | 1574 | int i; |
| 1575 | u32 npend = 0; |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1576 | |
Sujith Manoharan | 781b14a | 2012-06-04 20:23:55 +0530 | [diff] [blame] | 1577 | if (test_bit(SC_OP_INVALID, &sc->sc_flags)) |
Felix Fietkau | 080e1a2 | 2010-12-05 20:17:53 +0100 | [diff] [blame] | 1578 | return true; |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1579 | |
Felix Fietkau | 0d51ccc | 2011-03-11 21:38:18 +0100 | [diff] [blame] | 1580 | ath9k_hw_abort_tx_dma(ah); |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1581 | |
Felix Fietkau | 0d51ccc | 2011-03-11 21:38:18 +0100 | [diff] [blame] | 1582 | /* Check if any queue remains active */ |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1583 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { |
Felix Fietkau | 0d51ccc | 2011-03-11 21:38:18 +0100 | [diff] [blame] | 1584 | if (!ATH_TXQ_SETUP(sc, i)) |
| 1585 | continue; |
| 1586 | |
Felix Fietkau | 34d2581 | 2011-10-07 02:28:12 +0200 | [diff] [blame] | 1587 | if (ath9k_hw_numtxpending(ah, sc->tx.txq[i].axq_qnum)) |
| 1588 | npend |= BIT(i); |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1589 | } |
| 1590 | |
Felix Fietkau | 080e1a2 | 2010-12-05 20:17:53 +0100 | [diff] [blame] | 1591 | if (npend) |
Felix Fietkau | 34d2581 | 2011-10-07 02:28:12 +0200 | [diff] [blame] | 1592 | ath_err(common, "Failed to stop TX DMA, queues=0x%03x!\n", npend); |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1593 | |
| 1594 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { |
Felix Fietkau | 9246041 | 2011-01-24 19:23:14 +0100 | [diff] [blame] | 1595 | if (!ATH_TXQ_SETUP(sc, i)) |
| 1596 | continue; |
| 1597 | |
| 1598 | /* |
| 1599 | * The caller will resume queues with ieee80211_wake_queues. |
| 1600 | * Mark the queue as not stopped to prevent ath_tx_complete |
| 1601 | * from waking the queue too early. |
| 1602 | */ |
| 1603 | txq = &sc->tx.txq[i]; |
| 1604 | txq->stopped = false; |
Felix Fietkau | 1381559 | 2013-01-20 18:51:53 +0100 | [diff] [blame] | 1605 | ath_draintxq(sc, txq); |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1606 | } |
Felix Fietkau | 080e1a2 | 2010-12-05 20:17:53 +0100 | [diff] [blame] | 1607 | |
| 1608 | return !npend; |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1609 | } |
| 1610 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1611 | void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq) |
| 1612 | { |
| 1613 | ath9k_hw_releasetxqueue(sc->sc_ah, txq->axq_qnum); |
| 1614 | sc->tx.txqsetup &= ~(1<<txq->axq_qnum); |
| 1615 | } |
| 1616 | |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1617 | /* For each axq_acq entry, for each tid, try to schedule packets |
| 1618 | * for transmit until ampdu_depth has reached min Q depth. |
| 1619 | */ |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1620 | void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq) |
| 1621 | { |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1622 | struct ath_atx_ac *ac, *ac_tmp, *last_ac; |
| 1623 | struct ath_atx_tid *tid, *last_tid; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1624 | |
Rajkumar Manoharan | 124b979 | 2012-07-17 17:16:42 +0530 | [diff] [blame] | 1625 | if (test_bit(SC_OP_HW_RESET, &sc->sc_flags) || |
| 1626 | list_empty(&txq->axq_acq) || |
Felix Fietkau | 21f28e6 | 2011-01-15 14:30:14 +0100 | [diff] [blame] | 1627 | txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1628 | return; |
| 1629 | |
| 1630 | ac = list_first_entry(&txq->axq_acq, struct ath_atx_ac, list); |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1631 | last_ac = list_entry(txq->axq_acq.prev, struct ath_atx_ac, list); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1632 | |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1633 | list_for_each_entry_safe(ac, ac_tmp, &txq->axq_acq, list) { |
| 1634 | last_tid = list_entry(ac->tid_q.prev, struct ath_atx_tid, list); |
| 1635 | list_del(&ac->list); |
| 1636 | ac->sched = false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1637 | |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1638 | while (!list_empty(&ac->tid_q)) { |
| 1639 | tid = list_first_entry(&ac->tid_q, struct ath_atx_tid, |
| 1640 | list); |
| 1641 | list_del(&tid->list); |
| 1642 | tid->sched = false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1643 | |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1644 | if (tid->paused) |
| 1645 | continue; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1646 | |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1647 | ath_tx_sched_aggr(sc, txq, tid); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1648 | |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1649 | /* |
| 1650 | * add tid to round-robin queue if more frames |
| 1651 | * are pending for the tid |
| 1652 | */ |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 1653 | if (!skb_queue_empty(&tid->buf_q)) |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1654 | ath_tx_queue_tid(txq, tid); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1655 | |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1656 | if (tid == last_tid || |
| 1657 | txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) |
| 1658 | break; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1659 | } |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1660 | |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 1661 | if (!list_empty(&ac->tid_q) && !ac->sched) { |
| 1662 | ac->sched = true; |
| 1663 | list_add_tail(&ac->list, &txq->axq_acq); |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1664 | } |
| 1665 | |
| 1666 | if (ac == last_ac || |
| 1667 | txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) |
| 1668 | return; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1669 | } |
| 1670 | } |
| 1671 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1672 | /***********/ |
| 1673 | /* TX, DMA */ |
| 1674 | /***********/ |
| 1675 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1676 | /* |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1677 | * Insert a chain of ath_buf (descriptors) on a txq and |
| 1678 | * assume the descriptors are already chained together by caller. |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1679 | */ |
Sujith | 102e057 | 2008-10-29 10:15:16 +0530 | [diff] [blame] | 1680 | static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1681 | struct list_head *head, bool internal) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1682 | { |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 1683 | struct ath_hw *ah = sc->sc_ah; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1684 | struct ath_common *common = ath9k_hw_common(ah); |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1685 | struct ath_buf *bf, *bf_last; |
| 1686 | bool puttxbuf = false; |
| 1687 | bool edma; |
Sujith | 102e057 | 2008-10-29 10:15:16 +0530 | [diff] [blame] | 1688 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1689 | /* |
| 1690 | * Insert the frame on the outbound list and |
| 1691 | * pass it on to the hardware. |
| 1692 | */ |
| 1693 | |
| 1694 | if (list_empty(head)) |
| 1695 | return; |
| 1696 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1697 | edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1698 | bf = list_first_entry(head, struct ath_buf, list); |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1699 | bf_last = list_entry(head->prev, struct ath_buf, list); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1700 | |
Joe Perches | d2182b6 | 2011-12-15 14:55:53 -0800 | [diff] [blame] | 1701 | ath_dbg(common, QUEUE, "qnum: %d, txq depth: %d\n", |
| 1702 | txq->axq_qnum, txq->axq_depth); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1703 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1704 | if (edma && list_empty(&txq->txq_fifo[txq->txq_headidx])) { |
| 1705 | list_splice_tail_init(head, &txq->txq_fifo[txq->txq_headidx]); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 1706 | INCR(txq->txq_headidx, ATH_TXFIFO_DEPTH); |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1707 | puttxbuf = true; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1708 | } else { |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 1709 | list_splice_tail_init(head, &txq->axq_q); |
| 1710 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1711 | if (txq->axq_link) { |
| 1712 | ath9k_hw_set_desc_link(ah, txq->axq_link, bf->bf_daddr); |
Joe Perches | d2182b6 | 2011-12-15 14:55:53 -0800 | [diff] [blame] | 1713 | ath_dbg(common, XMIT, "link[%u] (%p)=%llx (%p)\n", |
Joe Perches | 226afe6 | 2010-12-02 19:12:37 -0800 | [diff] [blame] | 1714 | txq->axq_qnum, txq->axq_link, |
| 1715 | ito64(bf->bf_daddr), bf->bf_desc); |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1716 | } else if (!edma) |
| 1717 | puttxbuf = true; |
| 1718 | |
| 1719 | txq->axq_link = bf_last->bf_desc; |
| 1720 | } |
| 1721 | |
| 1722 | if (puttxbuf) { |
| 1723 | TX_STAT_INC(txq->axq_qnum, puttxbuf); |
| 1724 | ath9k_hw_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); |
Joe Perches | d2182b6 | 2011-12-15 14:55:53 -0800 | [diff] [blame] | 1725 | ath_dbg(common, XMIT, "TXDP[%u] = %llx (%p)\n", |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1726 | txq->axq_qnum, ito64(bf->bf_daddr), bf->bf_desc); |
| 1727 | } |
| 1728 | |
| 1729 | if (!edma) { |
Felix Fietkau | 8d8d3fd | 2011-01-24 19:11:54 +0100 | [diff] [blame] | 1730 | TX_STAT_INC(txq->axq_qnum, txstart); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 1731 | ath9k_hw_txstart(ah, txq->axq_qnum); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1732 | } |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1733 | |
| 1734 | if (!internal) { |
| 1735 | txq->axq_depth++; |
| 1736 | if (bf_is_ampdu_not_probing(bf)) |
| 1737 | txq->axq_ampdu_depth++; |
| 1738 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1739 | } |
| 1740 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1741 | static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid, |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 1742 | struct sk_buff *skb, struct ath_tx_control *txctl) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1743 | { |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 1744 | struct ath_frame_info *fi = get_frame_info(skb); |
Felix Fietkau | 04caf86 | 2010-11-14 15:20:12 +0100 | [diff] [blame] | 1745 | struct list_head bf_head; |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 1746 | struct ath_buf *bf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1747 | |
| 1748 | /* |
| 1749 | * Do not queue to h/w when any of the following conditions is true: |
| 1750 | * - there are pending frames in software queue |
| 1751 | * - the TID is currently paused for ADDBA/BAR request |
| 1752 | * - seqno is not within block-ack window |
| 1753 | * - h/w queue depth exceeds low water mark |
| 1754 | */ |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 1755 | if (!skb_queue_empty(&tid->buf_q) || tid->paused || |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 1756 | !BAW_WITHIN(tid->seq_start, tid->baw_size, tid->seq_next) || |
Felix Fietkau | 4b3ba66 | 2010-12-17 00:57:00 +0100 | [diff] [blame] | 1757 | txctl->txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) { |
Jouni Malinen | f7a276a | 2008-12-15 16:02:04 +0200 | [diff] [blame] | 1758 | /* |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1759 | * Add this frame to software queue for scheduling later |
| 1760 | * for aggregation. |
Jouni Malinen | f7a276a | 2008-12-15 16:02:04 +0200 | [diff] [blame] | 1761 | */ |
Ben Greear | bda8add | 2011-01-09 23:11:48 -0800 | [diff] [blame] | 1762 | TX_STAT_INC(txctl->txq->axq_qnum, a_queued_sw); |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 1763 | __skb_queue_tail(&tid->buf_q, skb); |
Felix Fietkau | 9af73cf | 2011-08-10 15:23:35 -0600 | [diff] [blame] | 1764 | if (!txctl->an || !txctl->an->sleeping) |
| 1765 | ath_tx_queue_tid(txctl->txq, tid); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1766 | return; |
Jouni Malinen | f7a276a | 2008-12-15 16:02:04 +0200 | [diff] [blame] | 1767 | } |
| 1768 | |
Felix Fietkau | 249ee72 | 2012-10-03 21:07:52 +0200 | [diff] [blame] | 1769 | bf = ath_tx_setup_buffer(sc, txctl->txq, tid, skb); |
| 1770 | if (!bf) { |
| 1771 | ieee80211_free_txskb(sc->hw, skb); |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 1772 | return; |
Felix Fietkau | 249ee72 | 2012-10-03 21:07:52 +0200 | [diff] [blame] | 1773 | } |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 1774 | |
Felix Fietkau | 79acac0 | 2013-04-22 23:11:44 +0200 | [diff] [blame] | 1775 | ath_set_rates(tid->an->vif, tid->an->sta, bf); |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1776 | bf->bf_state.bf_type = BUF_AMPDU; |
Felix Fietkau | 04caf86 | 2010-11-14 15:20:12 +0100 | [diff] [blame] | 1777 | INIT_LIST_HEAD(&bf_head); |
| 1778 | list_add(&bf->list, &bf_head); |
| 1779 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1780 | /* Add sub-frame to BAW */ |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 1781 | ath_tx_addto_baw(sc, tid, bf->bf_state.seqno); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1782 | |
| 1783 | /* Queue to h/w without aggregation */ |
Ben Greear | bda8add | 2011-01-09 23:11:48 -0800 | [diff] [blame] | 1784 | TX_STAT_INC(txctl->txq->axq_qnum, a_queued_hw); |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 1785 | bf->bf_lastbf = bf; |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1786 | ath_tx_fill_desc(sc, bf, txctl->txq, fi->framelen); |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1787 | ath_tx_txqaddbuf(sc, txctl->txq, &bf_head, false); |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 1788 | } |
| 1789 | |
Felix Fietkau | 82b873a | 2010-11-11 03:18:37 +0100 | [diff] [blame] | 1790 | static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq, |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 1791 | struct ath_atx_tid *tid, struct sk_buff *skb) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1792 | { |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 1793 | struct ath_frame_info *fi = get_frame_info(skb); |
| 1794 | struct list_head bf_head; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1795 | struct ath_buf *bf; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1796 | |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 1797 | bf = fi->bf; |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 1798 | |
| 1799 | INIT_LIST_HEAD(&bf_head); |
| 1800 | list_add_tail(&bf->list, &bf_head); |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1801 | bf->bf_state.bf_type = 0; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1802 | |
Felix Fietkau | 8c6e309 | 2012-10-26 00:31:11 +0200 | [diff] [blame] | 1803 | bf->bf_next = NULL; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 1804 | bf->bf_lastbf = bf; |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1805 | ath_tx_fill_desc(sc, bf, txq, fi->framelen); |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 1806 | ath_tx_txqaddbuf(sc, txq, &bf_head, false); |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 1807 | TX_STAT_INC(txq->axq_qnum, queued); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1808 | } |
| 1809 | |
Thomas Huehn | 36323f8 | 2012-07-23 21:33:42 +0200 | [diff] [blame] | 1810 | static void setup_frame_info(struct ieee80211_hw *hw, |
| 1811 | struct ieee80211_sta *sta, |
| 1812 | struct sk_buff *skb, |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 1813 | int framelen) |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1814 | { |
| 1815 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 1816 | struct ieee80211_key_conf *hw_key = tx_info->control.hw_key; |
Felix Fietkau | 6a0ddae | 2011-08-28 00:32:23 +0200 | [diff] [blame] | 1817 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
Felix Fietkau | 80b08a8 | 2012-06-15 03:04:53 +0200 | [diff] [blame] | 1818 | const struct ieee80211_rate *rate; |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 1819 | struct ath_frame_info *fi = get_frame_info(skb); |
Felix Fietkau | 93ae2dd | 2011-04-17 23:28:10 +0200 | [diff] [blame] | 1820 | struct ath_node *an = NULL; |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 1821 | enum ath9k_key_type keytype; |
Felix Fietkau | 80b08a8 | 2012-06-15 03:04:53 +0200 | [diff] [blame] | 1822 | bool short_preamble = false; |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1823 | |
Felix Fietkau | 80b08a8 | 2012-06-15 03:04:53 +0200 | [diff] [blame] | 1824 | /* |
| 1825 | * We check if Short Preamble is needed for the CTS rate by |
| 1826 | * checking the BSS's global flag. |
| 1827 | * But for the rate series, IEEE80211_TX_RC_USE_SHORT_PREAMBLE is used. |
| 1828 | */ |
| 1829 | if (tx_info->control.vif && |
| 1830 | tx_info->control.vif->bss_conf.use_short_preamble) |
| 1831 | short_preamble = true; |
| 1832 | |
| 1833 | rate = ieee80211_get_rts_cts_rate(hw, tx_info); |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 1834 | keytype = ath9k_cmn_get_hw_crypto_keytype(skb); |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1835 | |
Felix Fietkau | 93ae2dd | 2011-04-17 23:28:10 +0200 | [diff] [blame] | 1836 | if (sta) |
| 1837 | an = (struct ath_node *) sta->drv_priv; |
| 1838 | |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 1839 | memset(fi, 0, sizeof(*fi)); |
| 1840 | if (hw_key) |
| 1841 | fi->keyix = hw_key->hw_key_idx; |
Felix Fietkau | 93ae2dd | 2011-04-17 23:28:10 +0200 | [diff] [blame] | 1842 | else if (an && ieee80211_is_data(hdr->frame_control) && an->ps_key > 0) |
| 1843 | fi->keyix = an->ps_key; |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 1844 | else |
| 1845 | fi->keyix = ATH9K_TXKEYIX_INVALID; |
| 1846 | fi->keytype = keytype; |
| 1847 | fi->framelen = framelen; |
Felix Fietkau | 80b08a8 | 2012-06-15 03:04:53 +0200 | [diff] [blame] | 1848 | fi->rtscts_rate = rate->hw_value; |
| 1849 | if (short_preamble) |
| 1850 | fi->rtscts_rate |= rate->hw_value_short; |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1851 | } |
| 1852 | |
Mohammed Shafi Shajakhan | ea066d5 | 2010-11-23 20:42:27 +0530 | [diff] [blame] | 1853 | u8 ath_txchainmask_reduction(struct ath_softc *sc, u8 chainmask, u32 rate) |
| 1854 | { |
| 1855 | struct ath_hw *ah = sc->sc_ah; |
| 1856 | struct ath9k_channel *curchan = ah->curchan; |
Sujith Manoharan | 365d2eb | 2012-09-26 12:22:08 +0530 | [diff] [blame] | 1857 | |
Rajkumar Manoharan | d77bf3e | 2011-08-13 10:28:14 +0530 | [diff] [blame] | 1858 | if ((ah->caps.hw_caps & ATH9K_HW_CAP_APM) && |
| 1859 | (curchan->channelFlags & CHANNEL_5GHZ) && |
| 1860 | (chainmask == 0x7) && (rate < 0x90)) |
Mohammed Shafi Shajakhan | ea066d5 | 2010-11-23 20:42:27 +0530 | [diff] [blame] | 1861 | return 0x3; |
Sujith Manoharan | 365d2eb | 2012-09-26 12:22:08 +0530 | [diff] [blame] | 1862 | else if (AR_SREV_9462(ah) && ath9k_hw_btcoex_is_enabled(ah) && |
| 1863 | IS_CCK_RATE(rate)) |
| 1864 | return 0x2; |
Mohammed Shafi Shajakhan | ea066d5 | 2010-11-23 20:42:27 +0530 | [diff] [blame] | 1865 | else |
| 1866 | return chainmask; |
| 1867 | } |
| 1868 | |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 1869 | /* |
| 1870 | * Assign a descriptor (and sequence number if necessary, |
| 1871 | * and map buffer for DMA. Frees skb on error |
| 1872 | */ |
Felix Fietkau | fa05f87 | 2011-08-28 00:32:24 +0200 | [diff] [blame] | 1873 | static struct ath_buf *ath_tx_setup_buffer(struct ath_softc *sc, |
Felix Fietkau | 04caf86 | 2010-11-14 15:20:12 +0100 | [diff] [blame] | 1874 | struct ath_txq *txq, |
Felix Fietkau | fa05f87 | 2011-08-28 00:32:24 +0200 | [diff] [blame] | 1875 | struct ath_atx_tid *tid, |
Felix Fietkau | 249ee72 | 2012-10-03 21:07:52 +0200 | [diff] [blame] | 1876 | struct sk_buff *skb) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1877 | { |
Felix Fietkau | 82b873a | 2010-11-11 03:18:37 +0100 | [diff] [blame] | 1878 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 1879 | struct ath_frame_info *fi = get_frame_info(skb); |
Felix Fietkau | fa05f87 | 2011-08-28 00:32:24 +0200 | [diff] [blame] | 1880 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
Felix Fietkau | 82b873a | 2010-11-11 03:18:37 +0100 | [diff] [blame] | 1881 | struct ath_buf *bf; |
Sujith Manoharan | fd09c85 | 2012-04-17 08:34:50 +0530 | [diff] [blame] | 1882 | int fragno; |
Felix Fietkau | fa05f87 | 2011-08-28 00:32:24 +0200 | [diff] [blame] | 1883 | u16 seqno; |
Felix Fietkau | 82b873a | 2010-11-11 03:18:37 +0100 | [diff] [blame] | 1884 | |
| 1885 | bf = ath_tx_get_buffer(sc); |
| 1886 | if (!bf) { |
Joe Perches | d2182b6 | 2011-12-15 14:55:53 -0800 | [diff] [blame] | 1887 | ath_dbg(common, XMIT, "TX buffers are full\n"); |
Felix Fietkau | 249ee72 | 2012-10-03 21:07:52 +0200 | [diff] [blame] | 1888 | return NULL; |
Felix Fietkau | 82b873a | 2010-11-11 03:18:37 +0100 | [diff] [blame] | 1889 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1890 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1891 | ATH_TXBUF_RESET(bf); |
| 1892 | |
Felix Fietkau | fa05f87 | 2011-08-28 00:32:24 +0200 | [diff] [blame] | 1893 | if (tid) { |
Sujith Manoharan | fd09c85 | 2012-04-17 08:34:50 +0530 | [diff] [blame] | 1894 | fragno = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; |
Felix Fietkau | fa05f87 | 2011-08-28 00:32:24 +0200 | [diff] [blame] | 1895 | seqno = tid->seq_next; |
| 1896 | hdr->seq_ctrl = cpu_to_le16(tid->seq_next << IEEE80211_SEQ_SEQ_SHIFT); |
Sujith Manoharan | fd09c85 | 2012-04-17 08:34:50 +0530 | [diff] [blame] | 1897 | |
| 1898 | if (fragno) |
| 1899 | hdr->seq_ctrl |= cpu_to_le16(fragno); |
| 1900 | |
| 1901 | if (!ieee80211_has_morefrags(hdr->frame_control)) |
| 1902 | INCR(tid->seq_next, IEEE80211_SEQ_MAX); |
| 1903 | |
Felix Fietkau | fa05f87 | 2011-08-28 00:32:24 +0200 | [diff] [blame] | 1904 | bf->bf_state.seqno = seqno; |
| 1905 | } |
| 1906 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1907 | bf->bf_mpdu = skb; |
| 1908 | |
Ben Greear | c1739eb | 2010-10-14 12:45:29 -0700 | [diff] [blame] | 1909 | bf->bf_buf_addr = dma_map_single(sc->dev, skb->data, |
| 1910 | skb->len, DMA_TO_DEVICE); |
| 1911 | if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1912 | bf->bf_mpdu = NULL; |
Ben Greear | 6cf9e99 | 2010-10-14 12:45:30 -0700 | [diff] [blame] | 1913 | bf->bf_buf_addr = 0; |
Joe Perches | 3800276 | 2010-12-02 19:12:36 -0800 | [diff] [blame] | 1914 | ath_err(ath9k_hw_common(sc->sc_ah), |
| 1915 | "dma_mapping_error() on TX\n"); |
Felix Fietkau | 82b873a | 2010-11-11 03:18:37 +0100 | [diff] [blame] | 1916 | ath_tx_return_buffer(sc, bf); |
Felix Fietkau | 249ee72 | 2012-10-03 21:07:52 +0200 | [diff] [blame] | 1917 | return NULL; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1918 | } |
| 1919 | |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 1920 | fi->bf = bf; |
Felix Fietkau | 04caf86 | 2010-11-14 15:20:12 +0100 | [diff] [blame] | 1921 | |
| 1922 | return bf; |
| 1923 | } |
| 1924 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1925 | /* Upon failure caller should free skb */ |
Jouni Malinen | c52f33d | 2009-03-03 19:23:29 +0200 | [diff] [blame] | 1926 | int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb, |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1927 | struct ath_tx_control *txctl) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1928 | { |
Felix Fietkau | 28d1670 | 2010-11-14 15:20:10 +0100 | [diff] [blame] | 1929 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 1930 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
Thomas Huehn | 36323f8 | 2012-07-23 21:33:42 +0200 | [diff] [blame] | 1931 | struct ieee80211_sta *sta = txctl->sta; |
Felix Fietkau | f59a59f | 2011-05-10 20:52:22 +0200 | [diff] [blame] | 1932 | struct ieee80211_vif *vif = info->control.vif; |
Felix Fietkau | 9ac5861 | 2011-01-24 19:23:18 +0100 | [diff] [blame] | 1933 | struct ath_softc *sc = hw->priv; |
Felix Fietkau | 84642d6 | 2010-06-01 21:33:13 +0200 | [diff] [blame] | 1934 | struct ath_txq *txq = txctl->txq; |
Felix Fietkau | bdc2145 | 2013-04-22 23:11:43 +0200 | [diff] [blame] | 1935 | struct ath_atx_tid *tid = NULL; |
| 1936 | struct ath_buf *bf; |
Felix Fietkau | 28d1670 | 2010-11-14 15:20:10 +0100 | [diff] [blame] | 1937 | int padpos, padsize; |
Felix Fietkau | 04caf86 | 2010-11-14 15:20:12 +0100 | [diff] [blame] | 1938 | int frmlen = skb->len + FCS_LEN; |
Felix Fietkau | bdc2145 | 2013-04-22 23:11:43 +0200 | [diff] [blame] | 1939 | u8 tidno; |
Felix Fietkau | 82b873a | 2010-11-11 03:18:37 +0100 | [diff] [blame] | 1940 | int q; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1941 | |
Ben Greear | a9927ba | 2010-12-06 21:13:49 -0800 | [diff] [blame] | 1942 | /* NOTE: sta can be NULL according to net/mac80211.h */ |
| 1943 | if (sta) |
| 1944 | txctl->an = (struct ath_node *)sta->drv_priv; |
| 1945 | |
Felix Fietkau | 04caf86 | 2010-11-14 15:20:12 +0100 | [diff] [blame] | 1946 | if (info->control.hw_key) |
| 1947 | frmlen += info->control.hw_key->icv_len; |
| 1948 | |
Felix Fietkau | 28d1670 | 2010-11-14 15:20:10 +0100 | [diff] [blame] | 1949 | /* |
| 1950 | * As a temporary workaround, assign seq# here; this will likely need |
| 1951 | * to be cleaned up to work better with Beacon transmission and virtual |
| 1952 | * BSSes. |
| 1953 | */ |
| 1954 | if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { |
| 1955 | if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) |
| 1956 | sc->tx.seq_no += 0x10; |
| 1957 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); |
| 1958 | hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no); |
| 1959 | } |
| 1960 | |
John W. Linville | 42cecc3 | 2011-09-19 15:42:31 -0400 | [diff] [blame] | 1961 | /* Add the padding after the header if this is not already done */ |
Felix Fietkau | c60c992 | 2013-04-08 00:04:09 +0200 | [diff] [blame] | 1962 | padpos = ieee80211_hdrlen(hdr->frame_control); |
John W. Linville | 42cecc3 | 2011-09-19 15:42:31 -0400 | [diff] [blame] | 1963 | padsize = padpos & 3; |
| 1964 | if (padsize && skb->len > padpos) { |
| 1965 | if (skb_headroom(skb) < padsize) |
| 1966 | return -ENOMEM; |
Felix Fietkau | 28d1670 | 2010-11-14 15:20:10 +0100 | [diff] [blame] | 1967 | |
John W. Linville | 42cecc3 | 2011-09-19 15:42:31 -0400 | [diff] [blame] | 1968 | skb_push(skb, padsize); |
| 1969 | memmove(skb->data, skb->data + padsize, padpos); |
Felix Fietkau | 6e82bc4 | 2011-09-15 10:03:12 +0200 | [diff] [blame] | 1970 | hdr = (struct ieee80211_hdr *) skb->data; |
Felix Fietkau | 28d1670 | 2010-11-14 15:20:10 +0100 | [diff] [blame] | 1971 | } |
| 1972 | |
Felix Fietkau | f59a59f | 2011-05-10 20:52:22 +0200 | [diff] [blame] | 1973 | if ((vif && vif->type != NL80211_IFTYPE_AP && |
| 1974 | vif->type != NL80211_IFTYPE_AP_VLAN) || |
| 1975 | !ieee80211_is_data(hdr->frame_control)) |
| 1976 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
| 1977 | |
Thomas Huehn | 36323f8 | 2012-07-23 21:33:42 +0200 | [diff] [blame] | 1978 | setup_frame_info(hw, sta, skb, frmlen); |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 1979 | |
| 1980 | /* |
| 1981 | * At this point, the vif, hw_key and sta pointers in the tx control |
| 1982 | * info are no longer valid (overwritten by the ath_frame_info data. |
| 1983 | */ |
| 1984 | |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 1985 | q = skb_get_queue_mapping(skb); |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 1986 | |
| 1987 | ath_txq_lock(sc, txq); |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 1988 | if (txq == sc->tx.txq_map[q] && |
Felix Fietkau | 7702e78 | 2012-07-15 19:53:35 +0200 | [diff] [blame] | 1989 | ++txq->pending_frames > sc->tx.txq_max_pending[q] && |
| 1990 | !txq->stopped) { |
Felix Fietkau | 7545daf | 2011-01-24 19:23:16 +0100 | [diff] [blame] | 1991 | ieee80211_stop_queue(sc->hw, q); |
Rusty Russell | 3db1cd5 | 2011-12-19 13:56:45 +0000 | [diff] [blame] | 1992 | txq->stopped = true; |
Felix Fietkau | 97923b1 | 2010-06-12 00:33:55 -0400 | [diff] [blame] | 1993 | } |
Felix Fietkau | 97923b1 | 2010-06-12 00:33:55 -0400 | [diff] [blame] | 1994 | |
Felix Fietkau | bdc2145 | 2013-04-22 23:11:43 +0200 | [diff] [blame] | 1995 | if (txctl->an && ieee80211_is_data_qos(hdr->frame_control)) { |
| 1996 | tidno = ieee80211_get_qos_ctl(hdr)[0] & |
| 1997 | IEEE80211_QOS_CTL_TID_MASK; |
| 1998 | tid = ATH_AN_2_TID(txctl->an, tidno); |
Felix Fietkau | 3ad2952 | 2011-12-14 22:08:07 +0100 | [diff] [blame] | 1999 | |
Felix Fietkau | bdc2145 | 2013-04-22 23:11:43 +0200 | [diff] [blame] | 2000 | WARN_ON(tid->ac->txq != txctl->txq); |
| 2001 | } |
| 2002 | |
| 2003 | if ((info->flags & IEEE80211_TX_CTL_AMPDU) && tid) { |
| 2004 | /* |
| 2005 | * Try aggregation if it's a unicast data frame |
| 2006 | * and the destination is HT capable. |
| 2007 | */ |
| 2008 | ath_tx_send_ampdu(sc, tid, skb, txctl); |
| 2009 | goto out; |
| 2010 | } |
| 2011 | |
| 2012 | bf = ath_tx_setup_buffer(sc, txctl->txq, tid, skb); |
| 2013 | if (!bf) { |
| 2014 | if (txctl->paprd) |
| 2015 | dev_kfree_skb_any(skb); |
| 2016 | else |
| 2017 | ieee80211_free_txskb(sc->hw, skb); |
| 2018 | goto out; |
| 2019 | } |
| 2020 | |
| 2021 | bf->bf_state.bfs_paprd = txctl->paprd; |
| 2022 | |
| 2023 | if (txctl->paprd) |
| 2024 | bf->bf_state.bfs_paprd_timestamp = jiffies; |
| 2025 | |
Felix Fietkau | 79acac0 | 2013-04-22 23:11:44 +0200 | [diff] [blame] | 2026 | ath_set_rates(vif, sta, bf); |
Felix Fietkau | bdc2145 | 2013-04-22 23:11:43 +0200 | [diff] [blame] | 2027 | ath_tx_send_normal(sc, txctl->txq, tid, skb); |
| 2028 | |
| 2029 | out: |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 2030 | ath_txq_unlock(sc, txq); |
Felix Fietkau | 3ad2952 | 2011-12-14 22:08:07 +0100 | [diff] [blame] | 2031 | |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 2032 | return 0; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2033 | } |
| 2034 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2035 | /*****************/ |
| 2036 | /* TX Completion */ |
| 2037 | /*****************/ |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2038 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2039 | static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb, |
Rajkumar Manoharan | 0f9dc29 | 2011-07-29 17:38:14 +0530 | [diff] [blame] | 2040 | int tx_flags, struct ath_txq *txq) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2041 | { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2042 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 2043 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
Benoit Papillault | 4d91f9f | 2009-12-12 00:22:35 +0100 | [diff] [blame] | 2044 | struct ieee80211_hdr * hdr = (struct ieee80211_hdr *)skb->data; |
Felix Fietkau | 97923b1 | 2010-06-12 00:33:55 -0400 | [diff] [blame] | 2045 | int q, padpos, padsize; |
Sujith Manoharan | 07c15a3 | 2012-06-04 20:24:07 +0530 | [diff] [blame] | 2046 | unsigned long flags; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2047 | |
Joe Perches | d2182b6 | 2011-12-15 14:55:53 -0800 | [diff] [blame] | 2048 | ath_dbg(common, XMIT, "TX complete: skb: %p\n", skb); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2049 | |
Felix Fietkau | 51dea9b | 2012-08-27 17:00:07 +0200 | [diff] [blame] | 2050 | if (sc->sc_ah->caldata) |
| 2051 | sc->sc_ah->caldata->paprd_packet_sent = true; |
| 2052 | |
Felix Fietkau | 55797b1 | 2011-09-14 21:24:16 +0200 | [diff] [blame] | 2053 | if (!(tx_flags & ATH_TX_ERROR)) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2054 | /* Frame was ACKed */ |
| 2055 | tx_info->flags |= IEEE80211_TX_STAT_ACK; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2056 | |
Felix Fietkau | c60c992 | 2013-04-08 00:04:09 +0200 | [diff] [blame] | 2057 | padpos = ieee80211_hdrlen(hdr->frame_control); |
John W. Linville | 42cecc3 | 2011-09-19 15:42:31 -0400 | [diff] [blame] | 2058 | padsize = padpos & 3; |
| 2059 | if (padsize && skb->len>padpos+padsize) { |
| 2060 | /* |
| 2061 | * Remove MAC header padding before giving the frame back to |
| 2062 | * mac80211. |
| 2063 | */ |
| 2064 | memmove(skb->data + padsize, skb->data, padpos); |
| 2065 | skb_pull(skb, padsize); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2066 | } |
| 2067 | |
Sujith Manoharan | 07c15a3 | 2012-06-04 20:24:07 +0530 | [diff] [blame] | 2068 | spin_lock_irqsave(&sc->sc_pm_lock, flags); |
Felix Fietkau | c8e8868 | 2011-11-16 13:08:40 +0100 | [diff] [blame] | 2069 | if ((sc->ps_flags & PS_WAIT_FOR_TX_ACK) && !txq->axq_depth) { |
Sujith | 1b04b93 | 2010-01-08 10:36:05 +0530 | [diff] [blame] | 2070 | sc->ps_flags &= ~PS_WAIT_FOR_TX_ACK; |
Joe Perches | d2182b6 | 2011-12-15 14:55:53 -0800 | [diff] [blame] | 2071 | ath_dbg(common, PS, |
Joe Perches | 226afe6 | 2010-12-02 19:12:37 -0800 | [diff] [blame] | 2072 | "Going back to sleep after having received TX status (0x%lx)\n", |
Sujith | 1b04b93 | 2010-01-08 10:36:05 +0530 | [diff] [blame] | 2073 | sc->ps_flags & (PS_WAIT_FOR_BEACON | |
| 2074 | PS_WAIT_FOR_CAB | |
| 2075 | PS_WAIT_FOR_PSPOLL_DATA | |
| 2076 | PS_WAIT_FOR_TX_ACK)); |
Jouni Malinen | 9a23f9c | 2009-05-19 17:01:38 +0300 | [diff] [blame] | 2077 | } |
Sujith Manoharan | 07c15a3 | 2012-06-04 20:24:07 +0530 | [diff] [blame] | 2078 | spin_unlock_irqrestore(&sc->sc_pm_lock, flags); |
Jouni Malinen | 9a23f9c | 2009-05-19 17:01:38 +0300 | [diff] [blame] | 2079 | |
Felix Fietkau | 7545daf | 2011-01-24 19:23:16 +0100 | [diff] [blame] | 2080 | q = skb_get_queue_mapping(skb); |
| 2081 | if (txq == sc->tx.txq_map[q]) { |
Felix Fietkau | 7545daf | 2011-01-24 19:23:16 +0100 | [diff] [blame] | 2082 | if (WARN_ON(--txq->pending_frames < 0)) |
| 2083 | txq->pending_frames = 0; |
Felix Fietkau | 9246041 | 2011-01-24 19:23:14 +0100 | [diff] [blame] | 2084 | |
Felix Fietkau | 7702e78 | 2012-07-15 19:53:35 +0200 | [diff] [blame] | 2085 | if (txq->stopped && |
| 2086 | txq->pending_frames < sc->tx.txq_max_pending[q]) { |
Felix Fietkau | 7545daf | 2011-01-24 19:23:16 +0100 | [diff] [blame] | 2087 | ieee80211_wake_queue(sc->hw, q); |
Rusty Russell | 3db1cd5 | 2011-12-19 13:56:45 +0000 | [diff] [blame] | 2088 | txq->stopped = false; |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 2089 | } |
Felix Fietkau | 97923b1 | 2010-06-12 00:33:55 -0400 | [diff] [blame] | 2090 | } |
Felix Fietkau | 7545daf | 2011-01-24 19:23:16 +0100 | [diff] [blame] | 2091 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 2092 | __skb_queue_tail(&txq->complete_q, skb); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2093 | } |
| 2094 | |
| 2095 | static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 2096 | struct ath_txq *txq, struct list_head *bf_q, |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 2097 | struct ath_tx_status *ts, int txok) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2098 | { |
| 2099 | struct sk_buff *skb = bf->bf_mpdu; |
Felix Fietkau | 3afd21e | 2011-09-14 21:24:26 +0200 | [diff] [blame] | 2100 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2101 | unsigned long flags; |
Vasanthakumar Thiagarajan | 6b2c403 | 2009-03-20 15:27:50 +0530 | [diff] [blame] | 2102 | int tx_flags = 0; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2103 | |
Felix Fietkau | 55797b1 | 2011-09-14 21:24:16 +0200 | [diff] [blame] | 2104 | if (!txok) |
Vasanthakumar Thiagarajan | 6b2c403 | 2009-03-20 15:27:50 +0530 | [diff] [blame] | 2105 | tx_flags |= ATH_TX_ERROR; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2106 | |
Felix Fietkau | 3afd21e | 2011-09-14 21:24:26 +0200 | [diff] [blame] | 2107 | if (ts->ts_status & ATH9K_TXERR_FILT) |
| 2108 | tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED; |
| 2109 | |
Ben Greear | c1739eb | 2010-10-14 12:45:29 -0700 | [diff] [blame] | 2110 | dma_unmap_single(sc->dev, bf->bf_buf_addr, skb->len, DMA_TO_DEVICE); |
Ben Greear | 6cf9e99 | 2010-10-14 12:45:30 -0700 | [diff] [blame] | 2111 | bf->bf_buf_addr = 0; |
Felix Fietkau | 9f42c2b | 2010-06-12 00:34:01 -0400 | [diff] [blame] | 2112 | |
| 2113 | if (bf->bf_state.bfs_paprd) { |
Mohammed Shafi Shajakhan | 9cf04dc | 2011-02-04 18:38:23 +0530 | [diff] [blame] | 2114 | if (time_after(jiffies, |
| 2115 | bf->bf_state.bfs_paprd_timestamp + |
| 2116 | msecs_to_jiffies(ATH_PAPRD_TIMEOUT))) |
Vasanthakumar Thiagarajan | ca369eb | 2010-06-24 02:42:44 -0700 | [diff] [blame] | 2117 | dev_kfree_skb_any(skb); |
Vasanthakumar Thiagarajan | 78a1817 | 2010-06-24 02:42:46 -0700 | [diff] [blame] | 2118 | else |
Vasanthakumar Thiagarajan | ca369eb | 2010-06-24 02:42:44 -0700 | [diff] [blame] | 2119 | complete(&sc->paprd_complete); |
Felix Fietkau | 9f42c2b | 2010-06-12 00:34:01 -0400 | [diff] [blame] | 2120 | } else { |
Felix Fietkau | 55797b1 | 2011-09-14 21:24:16 +0200 | [diff] [blame] | 2121 | ath_debug_stat_tx(sc, bf, ts, txq, tx_flags); |
Rajkumar Manoharan | 0f9dc29 | 2011-07-29 17:38:14 +0530 | [diff] [blame] | 2122 | ath_tx_complete(sc, skb, tx_flags, txq); |
Felix Fietkau | 9f42c2b | 2010-06-12 00:34:01 -0400 | [diff] [blame] | 2123 | } |
Ben Greear | 6cf9e99 | 2010-10-14 12:45:30 -0700 | [diff] [blame] | 2124 | /* At this point, skb (bf->bf_mpdu) is consumed...make sure we don't |
| 2125 | * accidentally reference it later. |
| 2126 | */ |
| 2127 | bf->bf_mpdu = NULL; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2128 | |
| 2129 | /* |
| 2130 | * Return the list of ath_buf of this mpdu to free queue |
| 2131 | */ |
| 2132 | spin_lock_irqsave(&sc->tx.txbuflock, flags); |
| 2133 | list_splice_tail_init(bf_q, &sc->tx.txbuf); |
| 2134 | spin_unlock_irqrestore(&sc->tx.txbuflock, flags); |
| 2135 | } |
| 2136 | |
Felix Fietkau | 0cdd5c6 | 2011-01-24 19:23:17 +0100 | [diff] [blame] | 2137 | static void ath_tx_rc_status(struct ath_softc *sc, struct ath_buf *bf, |
| 2138 | struct ath_tx_status *ts, int nframes, int nbad, |
Felix Fietkau | 3afd21e | 2011-09-14 21:24:26 +0200 | [diff] [blame] | 2139 | int txok) |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2140 | { |
Sujith | a22be22 | 2009-03-30 15:28:36 +0530 | [diff] [blame] | 2141 | struct sk_buff *skb = bf->bf_mpdu; |
Sujith | 254ad0f | 2009-02-04 08:10:19 +0530 | [diff] [blame] | 2142 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2143 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Felix Fietkau | 0cdd5c6 | 2011-01-24 19:23:17 +0100 | [diff] [blame] | 2144 | struct ieee80211_hw *hw = sc->hw; |
Felix Fietkau | f0c255a | 2010-11-11 03:18:35 +0100 | [diff] [blame] | 2145 | struct ath_hw *ah = sc->sc_ah; |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 2146 | u8 i, tx_rateindex; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2147 | |
Sujith | 95e4acb | 2009-03-13 08:56:09 +0530 | [diff] [blame] | 2148 | if (txok) |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 2149 | tx_info->status.ack_signal = ts->ts_rssi; |
Sujith | 95e4acb | 2009-03-13 08:56:09 +0530 | [diff] [blame] | 2150 | |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 2151 | tx_rateindex = ts->ts_rateindex; |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 2152 | WARN_ON(tx_rateindex >= hw->max_rates); |
| 2153 | |
Felix Fietkau | 3afd21e | 2011-09-14 21:24:26 +0200 | [diff] [blame] | 2154 | if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) { |
Felix Fietkau | d969847 | 2010-03-01 13:32:11 +0100 | [diff] [blame] | 2155 | tx_info->flags |= IEEE80211_TX_STAT_AMPDU; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2156 | |
Felix Fietkau | b572d03 | 2010-11-14 15:20:07 +0100 | [diff] [blame] | 2157 | BUG_ON(nbad > nframes); |
Björn Smedman | ebd0228 | 2010-10-10 22:44:39 +0200 | [diff] [blame] | 2158 | } |
Rajkumar Manoharan | 185d158 | 2011-09-26 21:48:39 +0530 | [diff] [blame] | 2159 | tx_info->status.ampdu_len = nframes; |
| 2160 | tx_info->status.ampdu_ack_len = nframes - nbad; |
Björn Smedman | ebd0228 | 2010-10-10 22:44:39 +0200 | [diff] [blame] | 2161 | |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 2162 | if ((ts->ts_status & ATH9K_TXERR_FILT) == 0 && |
Felix Fietkau | 3afd21e | 2011-09-14 21:24:26 +0200 | [diff] [blame] | 2163 | (tx_info->flags & IEEE80211_TX_CTL_NO_ACK) == 0) { |
Felix Fietkau | f0c255a | 2010-11-11 03:18:35 +0100 | [diff] [blame] | 2164 | /* |
| 2165 | * If an underrun error is seen assume it as an excessive |
| 2166 | * retry only if max frame trigger level has been reached |
| 2167 | * (2 KB for single stream, and 4 KB for dual stream). |
| 2168 | * Adjust the long retry as if the frame was tried |
| 2169 | * hw->max_rate_tries times to affect how rate control updates |
| 2170 | * PER for the failed rate. |
| 2171 | * In case of congestion on the bus penalizing this type of |
| 2172 | * underruns should help hardware actually transmit new frames |
| 2173 | * successfully by eventually preferring slower rates. |
| 2174 | * This itself should also alleviate congestion on the bus. |
| 2175 | */ |
Felix Fietkau | 3afd21e | 2011-09-14 21:24:26 +0200 | [diff] [blame] | 2176 | if (unlikely(ts->ts_flags & (ATH9K_TX_DATA_UNDERRUN | |
| 2177 | ATH9K_TX_DELIM_UNDERRUN)) && |
| 2178 | ieee80211_is_data(hdr->frame_control) && |
Felix Fietkau | 83860c5 | 2011-03-23 20:57:33 +0100 | [diff] [blame] | 2179 | ah->tx_trig_level >= sc->sc_ah->config.max_txtrig_level) |
Felix Fietkau | f0c255a | 2010-11-11 03:18:35 +0100 | [diff] [blame] | 2180 | tx_info->status.rates[tx_rateindex].count = |
| 2181 | hw->max_rate_tries; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2182 | } |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 2183 | |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 2184 | for (i = tx_rateindex + 1; i < hw->max_rates; i++) { |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 2185 | tx_info->status.rates[i].count = 0; |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 2186 | tx_info->status.rates[i].idx = -1; |
| 2187 | } |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 2188 | |
Felix Fietkau | 78c4653 | 2010-06-25 01:26:16 +0200 | [diff] [blame] | 2189 | tx_info->status.rates[tx_rateindex].count = ts->ts_longretry + 1; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2190 | } |
| 2191 | |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2192 | static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2193 | { |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 2194 | struct ath_hw *ah = sc->sc_ah; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 2195 | struct ath_common *common = ath9k_hw_common(ah); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2196 | struct ath_buf *bf, *lastbf, *bf_held = NULL; |
| 2197 | struct list_head bf_head; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2198 | struct ath_desc *ds; |
Felix Fietkau | 29bffa9 | 2010-03-29 20:14:23 -0700 | [diff] [blame] | 2199 | struct ath_tx_status ts; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2200 | int status; |
| 2201 | |
Joe Perches | d2182b6 | 2011-12-15 14:55:53 -0800 | [diff] [blame] | 2202 | ath_dbg(common, QUEUE, "tx queue %d (%x), link %p\n", |
Joe Perches | 226afe6 | 2010-12-02 19:12:37 -0800 | [diff] [blame] | 2203 | txq->axq_qnum, ath9k_hw_gettxbuf(sc->sc_ah, txq->axq_qnum), |
| 2204 | txq->axq_link); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2205 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 2206 | ath_txq_lock(sc, txq); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2207 | for (;;) { |
Rajkumar Manoharan | 124b979 | 2012-07-17 17:16:42 +0530 | [diff] [blame] | 2208 | if (test_bit(SC_OP_HW_RESET, &sc->sc_flags)) |
Felix Fietkau | 236de51 | 2011-09-03 01:40:25 +0200 | [diff] [blame] | 2209 | break; |
| 2210 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2211 | if (list_empty(&txq->axq_q)) { |
| 2212 | txq->axq_link = NULL; |
Sujith Manoharan | 3d4e20f | 2012-03-14 14:40:58 +0530 | [diff] [blame] | 2213 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) |
Ben Greear | 082f653 | 2011-01-09 23:11:47 -0800 | [diff] [blame] | 2214 | ath_txq_schedule(sc, txq); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2215 | break; |
| 2216 | } |
| 2217 | bf = list_first_entry(&txq->axq_q, struct ath_buf, list); |
| 2218 | |
| 2219 | /* |
| 2220 | * There is a race condition that a BH gets scheduled |
| 2221 | * after sw writes TxE and before hw re-load the last |
| 2222 | * descriptor to get the newly chained one. |
| 2223 | * Software must keep the last DONE descriptor as a |
| 2224 | * holding descriptor - software does so by marking |
| 2225 | * it with the STALE flag. |
| 2226 | */ |
| 2227 | bf_held = NULL; |
Sujith | a119cc4 | 2009-03-30 15:28:38 +0530 | [diff] [blame] | 2228 | if (bf->bf_stale) { |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2229 | bf_held = bf; |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2230 | if (list_is_last(&bf_held->list, &txq->axq_q)) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2231 | break; |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2232 | |
| 2233 | bf = list_entry(bf_held->list.next, struct ath_buf, |
| 2234 | list); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2235 | } |
| 2236 | |
| 2237 | lastbf = bf->bf_lastbf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2238 | ds = lastbf->bf_desc; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2239 | |
Felix Fietkau | 29bffa9 | 2010-03-29 20:14:23 -0700 | [diff] [blame] | 2240 | memset(&ts, 0, sizeof(ts)); |
| 2241 | status = ath9k_hw_txprocdesc(ah, ds, &ts); |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2242 | if (status == -EINPROGRESS) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2243 | break; |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2244 | |
Ben Greear | 2dac4fb | 2011-01-09 23:11:45 -0800 | [diff] [blame] | 2245 | TX_STAT_INC(txq->axq_qnum, txprocdesc); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2246 | |
| 2247 | /* |
| 2248 | * Remove ath_buf's of the same transmit unit from txq, |
| 2249 | * however leave the last descriptor back as the holding |
| 2250 | * descriptor for hw. |
| 2251 | */ |
Sujith | a119cc4 | 2009-03-30 15:28:38 +0530 | [diff] [blame] | 2252 | lastbf->bf_stale = true; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2253 | INIT_LIST_HEAD(&bf_head); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2254 | if (!list_is_singular(&lastbf->list)) |
| 2255 | list_cut_position(&bf_head, |
| 2256 | &txq->axq_q, lastbf->list.prev); |
| 2257 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2258 | if (bf_held) { |
Felix Fietkau | 0a8cea8 | 2010-04-19 19:57:30 +0200 | [diff] [blame] | 2259 | list_del(&bf_held->list); |
Felix Fietkau | 0a8cea8 | 2010-04-19 19:57:30 +0200 | [diff] [blame] | 2260 | ath_tx_return_buffer(sc, bf_held); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2261 | } |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 2262 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2263 | ath_tx_process_buffer(sc, txq, &ts, bf, &bf_head); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2264 | } |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 2265 | ath_txq_unlock_complete(sc, txq); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2266 | } |
| 2267 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2268 | void ath_tx_tasklet(struct ath_softc *sc) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2269 | { |
Felix Fietkau | 239c795 | 2012-03-14 16:40:26 +0100 | [diff] [blame] | 2270 | struct ath_hw *ah = sc->sc_ah; |
| 2271 | u32 qcumask = ((1 << ATH9K_NUM_TX_QUEUES) - 1) & ah->intr_txqs; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2272 | int i; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2273 | |
| 2274 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2275 | if (ATH_TXQ_SETUP(sc, i) && (qcumask & (1 << i))) |
| 2276 | ath_tx_processq(sc, &sc->tx.txq[i]); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2277 | } |
| 2278 | } |
| 2279 | |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2280 | void ath_tx_edma_tasklet(struct ath_softc *sc) |
| 2281 | { |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2282 | struct ath_tx_status ts; |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2283 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
| 2284 | struct ath_hw *ah = sc->sc_ah; |
| 2285 | struct ath_txq *txq; |
| 2286 | struct ath_buf *bf, *lastbf; |
| 2287 | struct list_head bf_head; |
Felix Fietkau | 99ba6a4 | 2013-04-08 00:04:13 +0200 | [diff] [blame] | 2288 | struct list_head *fifo_list; |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2289 | int status; |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2290 | |
| 2291 | for (;;) { |
Rajkumar Manoharan | 124b979 | 2012-07-17 17:16:42 +0530 | [diff] [blame] | 2292 | if (test_bit(SC_OP_HW_RESET, &sc->sc_flags)) |
Felix Fietkau | 236de51 | 2011-09-03 01:40:25 +0200 | [diff] [blame] | 2293 | break; |
| 2294 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2295 | status = ath9k_hw_txprocdesc(ah, NULL, (void *)&ts); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2296 | if (status == -EINPROGRESS) |
| 2297 | break; |
| 2298 | if (status == -EIO) { |
Joe Perches | d2182b6 | 2011-12-15 14:55:53 -0800 | [diff] [blame] | 2299 | ath_dbg(common, XMIT, "Error processing tx status\n"); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2300 | break; |
| 2301 | } |
| 2302 | |
Felix Fietkau | 4e0ad25 | 2012-02-27 19:58:42 +0100 | [diff] [blame] | 2303 | /* Process beacon completions separately */ |
| 2304 | if (ts.qid == sc->beacon.beaconq) { |
| 2305 | sc->beacon.tx_processed = true; |
| 2306 | sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2307 | continue; |
Felix Fietkau | 4e0ad25 | 2012-02-27 19:58:42 +0100 | [diff] [blame] | 2308 | } |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2309 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2310 | txq = &sc->tx.txq[ts.qid]; |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2311 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 2312 | ath_txq_lock(sc, txq); |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2313 | |
Sujith Manoharan | 78ef731 | 2012-11-21 18:13:11 +0530 | [diff] [blame] | 2314 | TX_STAT_INC(txq->axq_qnum, txprocdesc); |
| 2315 | |
Felix Fietkau | 99ba6a4 | 2013-04-08 00:04:13 +0200 | [diff] [blame] | 2316 | fifo_list = &txq->txq_fifo[txq->txq_tailidx]; |
| 2317 | if (list_empty(fifo_list)) { |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 2318 | ath_txq_unlock(sc, txq); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2319 | return; |
| 2320 | } |
| 2321 | |
Felix Fietkau | 99ba6a4 | 2013-04-08 00:04:13 +0200 | [diff] [blame] | 2322 | bf = list_first_entry(fifo_list, struct ath_buf, list); |
| 2323 | if (bf->bf_stale) { |
| 2324 | list_del(&bf->list); |
| 2325 | ath_tx_return_buffer(sc, bf); |
| 2326 | bf = list_first_entry(fifo_list, struct ath_buf, list); |
| 2327 | } |
| 2328 | |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2329 | lastbf = bf->bf_lastbf; |
| 2330 | |
| 2331 | INIT_LIST_HEAD(&bf_head); |
Felix Fietkau | 99ba6a4 | 2013-04-08 00:04:13 +0200 | [diff] [blame] | 2332 | if (list_is_last(&lastbf->list, fifo_list)) { |
| 2333 | list_splice_tail_init(fifo_list, &bf_head); |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2334 | INCR(txq->txq_tailidx, ATH_TXFIFO_DEPTH); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2335 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2336 | if (!list_empty(&txq->axq_q)) { |
| 2337 | struct list_head bf_q; |
| 2338 | |
| 2339 | INIT_LIST_HEAD(&bf_q); |
| 2340 | txq->axq_link = NULL; |
| 2341 | list_splice_tail_init(&txq->axq_q, &bf_q); |
| 2342 | ath_tx_txqaddbuf(sc, txq, &bf_q, true); |
| 2343 | } |
Felix Fietkau | 99ba6a4 | 2013-04-08 00:04:13 +0200 | [diff] [blame] | 2344 | } else { |
| 2345 | lastbf->bf_stale = true; |
| 2346 | if (bf != lastbf) |
| 2347 | list_cut_position(&bf_head, fifo_list, |
| 2348 | lastbf->list.prev); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2349 | } |
| 2350 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2351 | ath_tx_process_buffer(sc, txq, &ts, bf, &bf_head); |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 2352 | ath_txq_unlock_complete(sc, txq); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2353 | } |
| 2354 | } |
| 2355 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2356 | /*****************/ |
| 2357 | /* Init, Cleanup */ |
| 2358 | /*****************/ |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2359 | |
Vasanthakumar Thiagarajan | 5088c2f | 2010-04-15 17:39:34 -0400 | [diff] [blame] | 2360 | static int ath_txstatus_setup(struct ath_softc *sc, int size) |
| 2361 | { |
| 2362 | struct ath_descdma *dd = &sc->txsdma; |
| 2363 | u8 txs_len = sc->sc_ah->caps.txs_len; |
| 2364 | |
| 2365 | dd->dd_desc_len = size * txs_len; |
Felix Fietkau | b81950b1 | 2012-12-12 13:14:22 +0100 | [diff] [blame] | 2366 | dd->dd_desc = dmam_alloc_coherent(sc->dev, dd->dd_desc_len, |
| 2367 | &dd->dd_desc_paddr, GFP_KERNEL); |
Vasanthakumar Thiagarajan | 5088c2f | 2010-04-15 17:39:34 -0400 | [diff] [blame] | 2368 | if (!dd->dd_desc) |
| 2369 | return -ENOMEM; |
| 2370 | |
| 2371 | return 0; |
| 2372 | } |
| 2373 | |
| 2374 | static int ath_tx_edma_init(struct ath_softc *sc) |
| 2375 | { |
| 2376 | int err; |
| 2377 | |
| 2378 | err = ath_txstatus_setup(sc, ATH_TXSTATUS_RING_SIZE); |
| 2379 | if (!err) |
| 2380 | ath9k_hw_setup_statusring(sc->sc_ah, sc->txsdma.dd_desc, |
| 2381 | sc->txsdma.dd_desc_paddr, |
| 2382 | ATH_TXSTATUS_RING_SIZE); |
| 2383 | |
| 2384 | return err; |
| 2385 | } |
| 2386 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2387 | int ath_tx_init(struct ath_softc *sc, int nbufs) |
| 2388 | { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 2389 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2390 | int error = 0; |
| 2391 | |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2392 | spin_lock_init(&sc->tx.txbuflock); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2393 | |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2394 | error = ath_descdma_setup(sc, &sc->tx.txdma, &sc->tx.txbuf, |
Vasanthakumar Thiagarajan | 4adfcde | 2010-04-15 17:39:33 -0400 | [diff] [blame] | 2395 | "tx", nbufs, 1, 1); |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2396 | if (error != 0) { |
Joe Perches | 3800276 | 2010-12-02 19:12:36 -0800 | [diff] [blame] | 2397 | ath_err(common, |
| 2398 | "Failed to allocate tx descriptors: %d\n", error); |
Felix Fietkau | b81950b1 | 2012-12-12 13:14:22 +0100 | [diff] [blame] | 2399 | return error; |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2400 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2401 | |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2402 | error = ath_descdma_setup(sc, &sc->beacon.bdma, &sc->beacon.bbuf, |
Vasanthakumar Thiagarajan | 5088c2f | 2010-04-15 17:39:34 -0400 | [diff] [blame] | 2403 | "beacon", ATH_BCBUF, 1, 1); |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2404 | if (error != 0) { |
Joe Perches | 3800276 | 2010-12-02 19:12:36 -0800 | [diff] [blame] | 2405 | ath_err(common, |
| 2406 | "Failed to allocate beacon descriptors: %d\n", error); |
Felix Fietkau | b81950b1 | 2012-12-12 13:14:22 +0100 | [diff] [blame] | 2407 | return error; |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2408 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2409 | |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 2410 | INIT_DELAYED_WORK(&sc->tx_complete_work, ath_tx_complete_poll_work); |
| 2411 | |
Felix Fietkau | b81950b1 | 2012-12-12 13:14:22 +0100 | [diff] [blame] | 2412 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) |
Vasanthakumar Thiagarajan | 5088c2f | 2010-04-15 17:39:34 -0400 | [diff] [blame] | 2413 | error = ath_tx_edma_init(sc); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2414 | |
| 2415 | return error; |
| 2416 | } |
| 2417 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2418 | void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an) |
| 2419 | { |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2420 | struct ath_atx_tid *tid; |
| 2421 | struct ath_atx_ac *ac; |
| 2422 | int tidno, acno; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2423 | |
Sujith | 8ee5afb | 2008-12-07 21:43:36 +0530 | [diff] [blame] | 2424 | for (tidno = 0, tid = &an->tid[tidno]; |
Sujith Manoharan | de7b760 | 2012-11-28 15:08:53 +0530 | [diff] [blame] | 2425 | tidno < IEEE80211_NUM_TIDS; |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2426 | tidno++, tid++) { |
| 2427 | tid->an = an; |
| 2428 | tid->tidno = tidno; |
| 2429 | tid->seq_start = tid->seq_next = 0; |
| 2430 | tid->baw_size = WME_MAX_BA; |
| 2431 | tid->baw_head = tid->baw_tail = 0; |
| 2432 | tid->sched = false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2433 | tid->paused = false; |
Sujith | a37c2c7 | 2008-10-29 10:15:40 +0530 | [diff] [blame] | 2434 | tid->state &= ~AGGR_CLEANUP; |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 2435 | __skb_queue_head_init(&tid->buf_q); |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2436 | acno = TID_TO_WME_AC(tidno); |
Sujith | 8ee5afb | 2008-12-07 21:43:36 +0530 | [diff] [blame] | 2437 | tid->ac = &an->ac[acno]; |
Sujith | a37c2c7 | 2008-10-29 10:15:40 +0530 | [diff] [blame] | 2438 | tid->state &= ~AGGR_ADDBA_COMPLETE; |
| 2439 | tid->state &= ~AGGR_ADDBA_PROGRESS; |
Felix Fietkau | 16e2342 | 2013-05-17 12:58:24 +0200 | [diff] [blame] | 2440 | tid->stop_cb = false; |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2441 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2442 | |
Sujith | 8ee5afb | 2008-12-07 21:43:36 +0530 | [diff] [blame] | 2443 | for (acno = 0, ac = &an->ac[acno]; |
Sujith Manoharan | bea843c | 2012-11-21 18:13:10 +0530 | [diff] [blame] | 2444 | acno < IEEE80211_NUM_ACS; acno++, ac++) { |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2445 | ac->sched = false; |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 2446 | ac->txq = sc->tx.txq_map[acno]; |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2447 | INIT_LIST_HEAD(&ac->tid_q); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2448 | } |
| 2449 | } |
| 2450 | |
Sujith | b5aa9bf | 2008-10-29 10:13:31 +0530 | [diff] [blame] | 2451 | void ath_tx_node_cleanup(struct ath_softc *sc, struct ath_node *an) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2452 | { |
Felix Fietkau | 2b40994 | 2010-07-07 19:42:08 +0200 | [diff] [blame] | 2453 | struct ath_atx_ac *ac; |
| 2454 | struct ath_atx_tid *tid; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2455 | struct ath_txq *txq; |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 2456 | int tidno; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2457 | |
Felix Fietkau | 2b40994 | 2010-07-07 19:42:08 +0200 | [diff] [blame] | 2458 | for (tidno = 0, tid = &an->tid[tidno]; |
Sujith Manoharan | de7b760 | 2012-11-28 15:08:53 +0530 | [diff] [blame] | 2459 | tidno < IEEE80211_NUM_TIDS; tidno++, tid++) { |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2460 | |
Felix Fietkau | 2b40994 | 2010-07-07 19:42:08 +0200 | [diff] [blame] | 2461 | ac = tid->ac; |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 2462 | txq = ac->txq; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2463 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 2464 | ath_txq_lock(sc, txq); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2465 | |
Felix Fietkau | 2b40994 | 2010-07-07 19:42:08 +0200 | [diff] [blame] | 2466 | if (tid->sched) { |
| 2467 | list_del(&tid->list); |
| 2468 | tid->sched = false; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2469 | } |
Felix Fietkau | 2b40994 | 2010-07-07 19:42:08 +0200 | [diff] [blame] | 2470 | |
| 2471 | if (ac->sched) { |
| 2472 | list_del(&ac->list); |
| 2473 | tid->ac->sched = false; |
| 2474 | } |
| 2475 | |
| 2476 | ath_tid_drain(sc, txq, tid); |
Felix Fietkau | 16e2342 | 2013-05-17 12:58:24 +0200 | [diff] [blame] | 2477 | ath_tx_clear_tid(sc, tid); |
Felix Fietkau | 2b40994 | 2010-07-07 19:42:08 +0200 | [diff] [blame] | 2478 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 2479 | ath_txq_unlock(sc, txq); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2480 | } |
| 2481 | } |