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 | |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 128 | static struct ath_frame_info *get_frame_info(struct sk_buff *skb) |
Felix Fietkau | 76e4522 | 2010-11-14 15:20:08 +0100 | [diff] [blame] | 129 | { |
| 130 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 131 | BUILD_BUG_ON(sizeof(struct ath_frame_info) > |
| 132 | sizeof(tx_info->rate_driver_data)); |
| 133 | return (struct ath_frame_info *) &tx_info->rate_driver_data[0]; |
Felix Fietkau | 76e4522 | 2010-11-14 15:20:08 +0100 | [diff] [blame] | 134 | } |
| 135 | |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 136 | static void ath_send_bar(struct ath_atx_tid *tid, u16 seqno) |
| 137 | { |
Felix Fietkau | f89d1bc | 2013-08-06 14:18:13 +0200 | [diff] [blame] | 138 | if (!tid->an->sta) |
| 139 | return; |
| 140 | |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 141 | ieee80211_send_bar(tid->an->vif, tid->an->sta->addr, tid->tidno, |
| 142 | seqno << IEEE80211_SEQ_SEQ_SHIFT); |
| 143 | } |
| 144 | |
Felix Fietkau | 79acac0 | 2013-04-22 23:11:44 +0200 | [diff] [blame] | 145 | static void ath_set_rates(struct ieee80211_vif *vif, struct ieee80211_sta *sta, |
| 146 | struct ath_buf *bf) |
| 147 | { |
| 148 | ieee80211_get_tx_rates(vif, sta, bf->bf_mpdu, bf->rates, |
| 149 | ARRAY_SIZE(bf->rates)); |
| 150 | } |
| 151 | |
Felix Fietkau | a4943cc | 2013-06-30 12:02:13 +0200 | [diff] [blame] | 152 | static void ath_txq_skb_done(struct ath_softc *sc, struct ath_txq *txq, |
| 153 | struct sk_buff *skb) |
| 154 | { |
| 155 | int q; |
| 156 | |
| 157 | q = skb_get_queue_mapping(skb); |
| 158 | if (txq == sc->tx.uapsdq) |
| 159 | txq = sc->tx.txq_map[q]; |
| 160 | |
| 161 | if (txq != sc->tx.txq_map[q]) |
| 162 | return; |
| 163 | |
| 164 | if (WARN_ON(--txq->pending_frames < 0)) |
| 165 | txq->pending_frames = 0; |
| 166 | |
| 167 | if (txq->stopped && |
| 168 | txq->pending_frames < sc->tx.txq_max_pending[q]) { |
| 169 | ieee80211_wake_queue(sc->hw, q); |
| 170 | txq->stopped = false; |
| 171 | } |
| 172 | } |
| 173 | |
Felix Fietkau | 1803d02 | 2013-08-06 14:18:04 +0200 | [diff] [blame] | 174 | static struct ath_atx_tid * |
| 175 | ath_get_skb_tid(struct ath_softc *sc, struct ath_node *an, struct sk_buff *skb) |
| 176 | { |
| 177 | struct ieee80211_hdr *hdr; |
| 178 | u8 tidno = 0; |
| 179 | |
| 180 | hdr = (struct ieee80211_hdr *) skb->data; |
| 181 | if (ieee80211_is_data_qos(hdr->frame_control)) |
| 182 | tidno = ieee80211_get_qos_ctl(hdr)[0]; |
| 183 | |
| 184 | tidno &= IEEE80211_QOS_CTL_TID_MASK; |
| 185 | return ATH_AN_2_TID(an, tidno); |
| 186 | } |
| 187 | |
Felix Fietkau | a7586ee | 2013-08-06 14:18:02 +0200 | [diff] [blame] | 188 | static bool ath_tid_has_buffered(struct ath_atx_tid *tid) |
| 189 | { |
Felix Fietkau | bb195ff | 2013-08-06 14:18:03 +0200 | [diff] [blame] | 190 | return !skb_queue_empty(&tid->buf_q) || !skb_queue_empty(&tid->retry_q); |
Felix Fietkau | a7586ee | 2013-08-06 14:18:02 +0200 | [diff] [blame] | 191 | } |
| 192 | |
| 193 | static struct sk_buff *ath_tid_dequeue(struct ath_atx_tid *tid) |
| 194 | { |
Felix Fietkau | bb195ff | 2013-08-06 14:18:03 +0200 | [diff] [blame] | 195 | struct sk_buff *skb; |
| 196 | |
| 197 | skb = __skb_dequeue(&tid->retry_q); |
| 198 | if (!skb) |
| 199 | skb = __skb_dequeue(&tid->buf_q); |
| 200 | |
| 201 | return skb; |
Felix Fietkau | a7586ee | 2013-08-06 14:18:02 +0200 | [diff] [blame] | 202 | } |
| 203 | |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 204 | /* |
| 205 | * ath_tx_tid_change_state: |
| 206 | * - clears a-mpdu flag of previous session |
| 207 | * - force sequence number allocation to fix next BlockAck Window |
| 208 | */ |
| 209 | static void |
| 210 | ath_tx_tid_change_state(struct ath_softc *sc, struct ath_atx_tid *tid) |
| 211 | { |
| 212 | struct ath_txq *txq = tid->ac->txq; |
| 213 | struct ieee80211_tx_info *tx_info; |
| 214 | struct sk_buff *skb, *tskb; |
| 215 | struct ath_buf *bf; |
| 216 | struct ath_frame_info *fi; |
| 217 | |
| 218 | skb_queue_walk_safe(&tid->buf_q, skb, tskb) { |
| 219 | fi = get_frame_info(skb); |
| 220 | bf = fi->bf; |
| 221 | |
| 222 | tx_info = IEEE80211_SKB_CB(skb); |
| 223 | tx_info->flags &= ~IEEE80211_TX_CTL_AMPDU; |
| 224 | |
| 225 | if (bf) |
| 226 | continue; |
| 227 | |
| 228 | bf = ath_tx_setup_buffer(sc, txq, tid, skb); |
| 229 | if (!bf) { |
| 230 | __skb_unlink(skb, &tid->buf_q); |
| 231 | ath_txq_skb_done(sc, txq, skb); |
| 232 | ieee80211_free_txskb(sc->hw, skb); |
| 233 | continue; |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | } |
| 238 | |
Felix Fietkau | 08c96ab | 2013-05-18 21:28:15 +0200 | [diff] [blame] | 239 | static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 240 | { |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 241 | struct ath_txq *txq = tid->ac->txq; |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 242 | struct sk_buff *skb; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 243 | struct ath_buf *bf; |
| 244 | struct list_head bf_head; |
Felix Fietkau | 90fa539 | 2010-09-20 13:45:38 +0200 | [diff] [blame] | 245 | struct ath_tx_status ts; |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 246 | struct ath_frame_info *fi; |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 247 | bool sendbar = false; |
Felix Fietkau | 90fa539 | 2010-09-20 13:45:38 +0200 | [diff] [blame] | 248 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 249 | INIT_LIST_HEAD(&bf_head); |
| 250 | |
Felix Fietkau | 90fa539 | 2010-09-20 13:45:38 +0200 | [diff] [blame] | 251 | memset(&ts, 0, sizeof(ts)); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 252 | |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 253 | while ((skb = __skb_dequeue(&tid->retry_q))) { |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 254 | fi = get_frame_info(skb); |
| 255 | bf = fi->bf; |
Felix Fietkau | 249ee72 | 2012-10-03 21:07:52 +0200 | [diff] [blame] | 256 | if (!bf) { |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 257 | ath_txq_skb_done(sc, txq, skb); |
| 258 | ieee80211_free_txskb(sc->hw, skb); |
| 259 | continue; |
Felix Fietkau | 249ee72 | 2012-10-03 21:07:52 +0200 | [diff] [blame] | 260 | } |
| 261 | |
Felix Fietkau | 8fed140 | 2013-08-06 14:18:07 +0200 | [diff] [blame] | 262 | if (fi->baw_tracked) { |
Felix Fietkau | 6a0ddae | 2011-08-28 00:32:23 +0200 | [diff] [blame] | 263 | ath_tx_update_baw(sc, tid, bf->bf_state.seqno); |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 264 | sendbar = true; |
Felix Fietkau | 90fa539 | 2010-09-20 13:45:38 +0200 | [diff] [blame] | 265 | } |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 266 | |
| 267 | list_add_tail(&bf->list, &bf_head); |
| 268 | ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 269 | } |
| 270 | |
Felix Fietkau | 08c96ab | 2013-05-18 21:28:15 +0200 | [diff] [blame] | 271 | if (sendbar) { |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 272 | ath_txq_unlock(sc, txq); |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 273 | ath_send_bar(tid, tid->seq_start); |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 274 | ath_txq_lock(sc, txq); |
| 275 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 276 | } |
| 277 | |
| 278 | static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid, |
| 279 | int seqno) |
| 280 | { |
| 281 | int index, cindex; |
| 282 | |
| 283 | index = ATH_BA_INDEX(tid->seq_start, seqno); |
| 284 | cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); |
| 285 | |
Felix Fietkau | 81ee13b | 2010-09-20 13:45:36 +0200 | [diff] [blame] | 286 | __clear_bit(cindex, tid->tx_buf); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 287 | |
Felix Fietkau | 81ee13b | 2010-09-20 13:45:36 +0200 | [diff] [blame] | 288 | 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] | 289 | INCR(tid->seq_start, IEEE80211_SEQ_MAX); |
| 290 | INCR(tid->baw_head, ATH_TID_MAX_BUFS); |
Felix Fietkau | f943754 | 2011-12-14 22:08:08 +0100 | [diff] [blame] | 291 | if (tid->bar_index >= 0) |
| 292 | tid->bar_index--; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 293 | } |
| 294 | } |
| 295 | |
| 296 | static void ath_tx_addto_baw(struct ath_softc *sc, struct ath_atx_tid *tid, |
Felix Fietkau | 8fed140 | 2013-08-06 14:18:07 +0200 | [diff] [blame] | 297 | struct ath_buf *bf) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 298 | { |
Felix Fietkau | 8fed140 | 2013-08-06 14:18:07 +0200 | [diff] [blame] | 299 | struct ath_frame_info *fi = get_frame_info(bf->bf_mpdu); |
| 300 | u16 seqno = bf->bf_state.seqno; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 301 | int index, cindex; |
| 302 | |
Felix Fietkau | 2d3bcba | 2010-11-14 15:20:01 +0100 | [diff] [blame] | 303 | index = ATH_BA_INDEX(tid->seq_start, seqno); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 304 | cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); |
Felix Fietkau | 81ee13b | 2010-09-20 13:45:36 +0200 | [diff] [blame] | 305 | __set_bit(cindex, tid->tx_buf); |
Felix Fietkau | 8fed140 | 2013-08-06 14:18:07 +0200 | [diff] [blame] | 306 | fi->baw_tracked = 1; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 307 | |
| 308 | if (index >= ((tid->baw_tail - tid->baw_head) & |
| 309 | (ATH_TID_MAX_BUFS - 1))) { |
| 310 | tid->baw_tail = cindex; |
| 311 | INCR(tid->baw_tail, ATH_TID_MAX_BUFS); |
| 312 | } |
| 313 | } |
| 314 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 315 | static void ath_tid_drain(struct ath_softc *sc, struct ath_txq *txq, |
| 316 | struct ath_atx_tid *tid) |
| 317 | |
| 318 | { |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 319 | struct sk_buff *skb; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 320 | struct ath_buf *bf; |
| 321 | struct list_head bf_head; |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 322 | struct ath_tx_status ts; |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 323 | struct ath_frame_info *fi; |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 324 | |
| 325 | memset(&ts, 0, sizeof(ts)); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 326 | INIT_LIST_HEAD(&bf_head); |
| 327 | |
Felix Fietkau | a7586ee | 2013-08-06 14:18:02 +0200 | [diff] [blame] | 328 | while ((skb = ath_tid_dequeue(tid))) { |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 329 | fi = get_frame_info(skb); |
| 330 | bf = fi->bf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 331 | |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 332 | if (!bf) { |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 333 | ath_tx_complete(sc, skb, ATH_TX_ERROR, txq); |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 334 | continue; |
| 335 | } |
| 336 | |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 337 | list_add_tail(&bf->list, &bf_head); |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 338 | ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 339 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 340 | } |
| 341 | |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 342 | 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] | 343 | struct sk_buff *skb, int count) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 344 | { |
Felix Fietkau | 8b7f853 | 2010-11-28 19:37:48 +0100 | [diff] [blame] | 345 | struct ath_frame_info *fi = get_frame_info(skb); |
Felix Fietkau | f11cc94 | 2011-09-15 12:59:49 +0200 | [diff] [blame] | 346 | struct ath_buf *bf = fi->bf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 347 | struct ieee80211_hdr *hdr; |
Felix Fietkau | da64762 | 2011-12-14 22:08:03 +0100 | [diff] [blame] | 348 | int prev = fi->retries; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 349 | |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 350 | TX_STAT_INC(txq->axq_qnum, a_retries); |
Felix Fietkau | da64762 | 2011-12-14 22:08:03 +0100 | [diff] [blame] | 351 | fi->retries += count; |
| 352 | |
| 353 | if (prev > 0) |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 354 | return; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 355 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 356 | hdr = (struct ieee80211_hdr *)skb->data; |
| 357 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_RETRY); |
Felix Fietkau | f11cc94 | 2011-09-15 12:59:49 +0200 | [diff] [blame] | 358 | dma_sync_single_for_device(sc->dev, bf->bf_buf_addr, |
| 359 | sizeof(*hdr), DMA_TO_DEVICE); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 360 | } |
| 361 | |
Felix Fietkau | 0a8cea8 | 2010-04-19 19:57:30 +0200 | [diff] [blame] | 362 | static struct ath_buf *ath_tx_get_buffer(struct ath_softc *sc) |
| 363 | { |
| 364 | struct ath_buf *bf = NULL; |
| 365 | |
| 366 | spin_lock_bh(&sc->tx.txbuflock); |
| 367 | |
| 368 | if (unlikely(list_empty(&sc->tx.txbuf))) { |
| 369 | spin_unlock_bh(&sc->tx.txbuflock); |
| 370 | return NULL; |
| 371 | } |
| 372 | |
| 373 | bf = list_first_entry(&sc->tx.txbuf, struct ath_buf, list); |
| 374 | list_del(&bf->list); |
| 375 | |
| 376 | spin_unlock_bh(&sc->tx.txbuflock); |
| 377 | |
| 378 | return bf; |
| 379 | } |
| 380 | |
| 381 | static void ath_tx_return_buffer(struct ath_softc *sc, struct ath_buf *bf) |
| 382 | { |
| 383 | spin_lock_bh(&sc->tx.txbuflock); |
| 384 | list_add_tail(&bf->list, &sc->tx.txbuf); |
| 385 | spin_unlock_bh(&sc->tx.txbuflock); |
| 386 | } |
| 387 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 388 | static struct ath_buf* ath_clone_txbuf(struct ath_softc *sc, struct ath_buf *bf) |
| 389 | { |
| 390 | struct ath_buf *tbf; |
| 391 | |
Felix Fietkau | 0a8cea8 | 2010-04-19 19:57:30 +0200 | [diff] [blame] | 392 | tbf = ath_tx_get_buffer(sc); |
| 393 | if (WARN_ON(!tbf)) |
Vasanthakumar Thiagarajan | 8a46097 | 2009-06-10 17:50:09 +0530 | [diff] [blame] | 394 | return NULL; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 395 | |
| 396 | ATH_TXBUF_RESET(tbf); |
| 397 | |
| 398 | tbf->bf_mpdu = bf->bf_mpdu; |
| 399 | tbf->bf_buf_addr = bf->bf_buf_addr; |
Vasanthakumar Thiagarajan | d826c83 | 2010-04-15 17:38:45 -0400 | [diff] [blame] | 400 | 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] | 401 | tbf->bf_state = bf->bf_state; |
Felix Fietkau | 86c7d8d | 2013-09-14 15:46:33 +0200 | [diff] [blame] | 402 | tbf->bf_state.stale = false; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 403 | |
| 404 | return tbf; |
| 405 | } |
| 406 | |
Felix Fietkau | b572d03 | 2010-11-14 15:20:07 +0100 | [diff] [blame] | 407 | static void ath_tx_count_frames(struct ath_softc *sc, struct ath_buf *bf, |
| 408 | struct ath_tx_status *ts, int txok, |
| 409 | int *nframes, int *nbad) |
| 410 | { |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 411 | struct ath_frame_info *fi; |
Felix Fietkau | b572d03 | 2010-11-14 15:20:07 +0100 | [diff] [blame] | 412 | u16 seq_st = 0; |
| 413 | u32 ba[WME_BA_BMP_SIZE >> 5]; |
| 414 | int ba_index; |
| 415 | int isaggr = 0; |
| 416 | |
| 417 | *nbad = 0; |
| 418 | *nframes = 0; |
| 419 | |
Felix Fietkau | b572d03 | 2010-11-14 15:20:07 +0100 | [diff] [blame] | 420 | isaggr = bf_isaggr(bf); |
| 421 | if (isaggr) { |
| 422 | seq_st = ts->ts_seqnum; |
| 423 | memcpy(ba, &ts->ba_low, WME_BA_BMP_SIZE >> 3); |
| 424 | } |
| 425 | |
| 426 | while (bf) { |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 427 | fi = get_frame_info(bf->bf_mpdu); |
Felix Fietkau | 6a0ddae | 2011-08-28 00:32:23 +0200 | [diff] [blame] | 428 | ba_index = ATH_BA_INDEX(seq_st, bf->bf_state.seqno); |
Felix Fietkau | b572d03 | 2010-11-14 15:20:07 +0100 | [diff] [blame] | 429 | |
| 430 | (*nframes)++; |
| 431 | if (!txok || (isaggr && !ATH_BA_ISSET(ba, ba_index))) |
| 432 | (*nbad)++; |
| 433 | |
| 434 | bf = bf->bf_next; |
| 435 | } |
| 436 | } |
| 437 | |
| 438 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 439 | static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq, |
| 440 | struct ath_buf *bf, struct list_head *bf_q, |
Felix Fietkau | 1381559 | 2013-01-20 18:51:53 +0100 | [diff] [blame] | 441 | struct ath_tx_status *ts, int txok) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 442 | { |
| 443 | struct ath_node *an = NULL; |
| 444 | struct sk_buff *skb; |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 445 | struct ieee80211_sta *sta; |
Felix Fietkau | 0cdd5c6 | 2011-01-24 19:23:17 +0100 | [diff] [blame] | 446 | struct ieee80211_hw *hw = sc->hw; |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 447 | struct ieee80211_hdr *hdr; |
Luis R. Rodriguez | 76d5a9e | 2009-11-02 16:08:34 -0800 | [diff] [blame] | 448 | struct ieee80211_tx_info *tx_info; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 449 | struct ath_atx_tid *tid = NULL; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 450 | struct ath_buf *bf_next, *bf_last = bf->bf_lastbf; |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 451 | struct list_head bf_head; |
| 452 | struct sk_buff_head bf_pending; |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 453 | u16 seq_st = 0, acked_cnt = 0, txfail_cnt = 0, seq_first; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 454 | u32 ba[WME_BA_BMP_SIZE >> 5]; |
Vasanthakumar Thiagarajan | 0934af2 | 2009-03-18 20:22:00 +0530 | [diff] [blame] | 455 | int isaggr, txfail, txpending, sendbar = 0, needreset = 0, nbad = 0; |
Sven Eckelmann | 6fe7cc7 | 2012-10-29 13:25:20 +0100 | [diff] [blame] | 456 | bool rc_update = true, isba; |
Felix Fietkau | 78c4653 | 2010-06-25 01:26:16 +0200 | [diff] [blame] | 457 | struct ieee80211_tx_rate rates[4]; |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 458 | struct ath_frame_info *fi; |
Björn Smedman | ebd0228 | 2010-10-10 22:44:39 +0200 | [diff] [blame] | 459 | int nframes; |
Felix Fietkau | daa5c40 | 2011-10-07 02:28:15 +0200 | [diff] [blame] | 460 | bool flush = !!(ts->ts_status & ATH9K_TX_FLUSH); |
Felix Fietkau | da64762 | 2011-12-14 22:08:03 +0100 | [diff] [blame] | 461 | int i, retries; |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 462 | int bar_index = -1; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 463 | |
Sujith | a22be22 | 2009-03-30 15:28:36 +0530 | [diff] [blame] | 464 | skb = bf->bf_mpdu; |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 465 | hdr = (struct ieee80211_hdr *)skb->data; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 466 | |
Luis R. Rodriguez | 76d5a9e | 2009-11-02 16:08:34 -0800 | [diff] [blame] | 467 | tx_info = IEEE80211_SKB_CB(skb); |
Luis R. Rodriguez | 76d5a9e | 2009-11-02 16:08:34 -0800 | [diff] [blame] | 468 | |
Felix Fietkau | 79acac0 | 2013-04-22 23:11:44 +0200 | [diff] [blame] | 469 | memcpy(rates, bf->rates, sizeof(rates)); |
Felix Fietkau | 78c4653 | 2010-06-25 01:26:16 +0200 | [diff] [blame] | 470 | |
Felix Fietkau | da64762 | 2011-12-14 22:08:03 +0100 | [diff] [blame] | 471 | retries = ts->ts_longretry + 1; |
| 472 | for (i = 0; i < ts->ts_rateindex; i++) |
| 473 | retries += rates[i].count; |
| 474 | |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 475 | rcu_read_lock(); |
| 476 | |
Ben Greear | 686b9cb | 2010-09-23 09:44:36 -0700 | [diff] [blame] | 477 | sta = ieee80211_find_sta_by_ifaddr(hw, hdr->addr1, hdr->addr2); |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 478 | if (!sta) { |
| 479 | rcu_read_unlock(); |
Felix Fietkau | 73e1946 | 2010-07-07 19:42:09 +0200 | [diff] [blame] | 480 | |
Felix Fietkau | 31e79a5 | 2010-07-12 23:16:34 +0200 | [diff] [blame] | 481 | INIT_LIST_HEAD(&bf_head); |
| 482 | while (bf) { |
| 483 | bf_next = bf->bf_next; |
| 484 | |
Felix Fietkau | 50676b8 | 2013-08-10 15:59:16 +0200 | [diff] [blame] | 485 | if (!bf->bf_state.stale || bf_next != NULL) |
Felix Fietkau | 31e79a5 | 2010-07-12 23:16:34 +0200 | [diff] [blame] | 486 | list_move_tail(&bf->list, &bf_head); |
| 487 | |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 488 | ath_tx_complete_buf(sc, bf, txq, &bf_head, ts, 0); |
Felix Fietkau | 31e79a5 | 2010-07-12 23:16:34 +0200 | [diff] [blame] | 489 | |
| 490 | bf = bf_next; |
| 491 | } |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 492 | return; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 493 | } |
| 494 | |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 495 | an = (struct ath_node *)sta->drv_priv; |
Felix Fietkau | 1803d02 | 2013-08-06 14:18:04 +0200 | [diff] [blame] | 496 | tid = ath_get_skb_tid(sc, an, skb); |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 497 | seq_first = tid->seq_start; |
Sven Eckelmann | 6fe7cc7 | 2012-10-29 13:25:20 +0100 | [diff] [blame] | 498 | isba = ts->ts_flags & ATH9K_TX_BA; |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 499 | |
Felix Fietkau | b11b160 | 2010-07-11 12:48:44 +0200 | [diff] [blame] | 500 | /* |
| 501 | * The hardware occasionally sends a tx status for the wrong TID. |
| 502 | * In this case, the BA status cannot be considered valid and all |
| 503 | * subframes need to be retransmitted |
Sven Eckelmann | 6fe7cc7 | 2012-10-29 13:25:20 +0100 | [diff] [blame] | 504 | * |
| 505 | * Only BlockAcks have a TID and therefore normal Acks cannot be |
| 506 | * checked |
Felix Fietkau | b11b160 | 2010-07-11 12:48:44 +0200 | [diff] [blame] | 507 | */ |
Felix Fietkau | 1803d02 | 2013-08-06 14:18:04 +0200 | [diff] [blame] | 508 | if (isba && tid->tidno != ts->tid) |
Felix Fietkau | b11b160 | 2010-07-11 12:48:44 +0200 | [diff] [blame] | 509 | txok = false; |
| 510 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 511 | isaggr = bf_isaggr(bf); |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 512 | memset(ba, 0, WME_BA_BMP_SIZE >> 3); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 513 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 514 | if (isaggr && txok) { |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 515 | if (ts->ts_flags & ATH9K_TX_BA) { |
| 516 | seq_st = ts->ts_seqnum; |
| 517 | memcpy(ba, &ts->ba_low, WME_BA_BMP_SIZE >> 3); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 518 | } else { |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 519 | /* |
| 520 | * AR5416 can become deaf/mute when BA |
| 521 | * issue happens. Chip needs to be reset. |
| 522 | * But AP code may have sychronization issues |
| 523 | * when perform internal reset in this routine. |
| 524 | * Only enable reset in STA mode for now. |
| 525 | */ |
Sujith | 2660b81 | 2009-02-09 13:27:26 +0530 | [diff] [blame] | 526 | if (sc->sc_ah->opmode == NL80211_IFTYPE_STATION) |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 527 | needreset = 1; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 528 | } |
| 529 | } |
| 530 | |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 531 | __skb_queue_head_init(&bf_pending); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 532 | |
Felix Fietkau | b572d03 | 2010-11-14 15:20:07 +0100 | [diff] [blame] | 533 | ath_tx_count_frames(sc, bf, ts, txok, &nframes, &nbad); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 534 | while (bf) { |
Felix Fietkau | 6a0ddae | 2011-08-28 00:32:23 +0200 | [diff] [blame] | 535 | u16 seqno = bf->bf_state.seqno; |
| 536 | |
Felix Fietkau | f0b8220 | 2011-01-15 14:30:15 +0100 | [diff] [blame] | 537 | txfail = txpending = sendbar = 0; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 538 | bf_next = bf->bf_next; |
| 539 | |
Felix Fietkau | 78c4653 | 2010-06-25 01:26:16 +0200 | [diff] [blame] | 540 | skb = bf->bf_mpdu; |
| 541 | tx_info = IEEE80211_SKB_CB(skb); |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 542 | fi = get_frame_info(skb); |
Felix Fietkau | 78c4653 | 2010-06-25 01:26:16 +0200 | [diff] [blame] | 543 | |
Felix Fietkau | 897d7fd | 2013-08-06 14:18:09 +0200 | [diff] [blame] | 544 | if (!BAW_WITHIN(tid->seq_start, tid->baw_size, seqno) || |
| 545 | !tid->active) { |
Felix Fietkau | 08c96ab | 2013-05-18 21:28:15 +0200 | [diff] [blame] | 546 | /* |
| 547 | * Outside of the current BlockAck window, |
| 548 | * maybe part of a previous session |
| 549 | */ |
| 550 | txfail = 1; |
| 551 | } else if (ATH_BA_ISSET(ba, ATH_BA_INDEX(seq_st, seqno))) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 552 | /* transmit completion, subframe is |
| 553 | * acked by block ack */ |
Vasanthakumar Thiagarajan | 0934af2 | 2009-03-18 20:22:00 +0530 | [diff] [blame] | 554 | acked_cnt++; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 555 | } else if (!isaggr && txok) { |
| 556 | /* transmit completion */ |
Vasanthakumar Thiagarajan | 0934af2 | 2009-03-18 20:22:00 +0530 | [diff] [blame] | 557 | acked_cnt++; |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 558 | } else if (flush) { |
| 559 | txpending = 1; |
| 560 | } else if (fi->retries < ATH_MAX_SW_RETRIES) { |
| 561 | if (txok || !an->sleeping) |
| 562 | ath_tx_set_retry(sc, txq, bf->bf_mpdu, |
| 563 | retries); |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 564 | |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 565 | txpending = 1; |
| 566 | } else { |
| 567 | txfail = 1; |
| 568 | txfail_cnt++; |
| 569 | bar_index = max_t(int, bar_index, |
| 570 | ATH_BA_INDEX(seq_first, seqno)); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 571 | } |
| 572 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 573 | /* |
| 574 | * Make sure the last desc is reclaimed if it |
| 575 | * not a holding desc. |
| 576 | */ |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 577 | INIT_LIST_HEAD(&bf_head); |
Felix Fietkau | 50676b8 | 2013-08-10 15:59:16 +0200 | [diff] [blame] | 578 | if (bf_next != NULL || !bf_last->bf_state.stale) |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 579 | list_move_tail(&bf->list, &bf_head); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 580 | |
Felix Fietkau | 08c96ab | 2013-05-18 21:28:15 +0200 | [diff] [blame] | 581 | if (!txpending) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 582 | /* |
| 583 | * complete the acked-ones/xretried ones; update |
| 584 | * block-ack window |
| 585 | */ |
Felix Fietkau | 6a0ddae | 2011-08-28 00:32:23 +0200 | [diff] [blame] | 586 | ath_tx_update_baw(sc, tid, seqno); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 587 | |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 588 | if (rc_update && (acked_cnt == 1 || txfail_cnt == 1)) { |
Felix Fietkau | 78c4653 | 2010-06-25 01:26:16 +0200 | [diff] [blame] | 589 | memcpy(tx_info->control.rates, rates, sizeof(rates)); |
Felix Fietkau | 3afd21e | 2011-09-14 21:24:26 +0200 | [diff] [blame] | 590 | ath_tx_rc_status(sc, bf, ts, nframes, nbad, txok); |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 591 | rc_update = false; |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 592 | } |
| 593 | |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 594 | ath_tx_complete_buf(sc, bf, txq, &bf_head, ts, |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 595 | !txfail); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 596 | } else { |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 597 | if (tx_info->flags & IEEE80211_TX_STATUS_EOSP) { |
| 598 | tx_info->flags &= ~IEEE80211_TX_STATUS_EOSP; |
| 599 | ieee80211_sta_eosp(sta); |
| 600 | } |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 601 | /* retry the un-acked ones */ |
Felix Fietkau | 50676b8 | 2013-08-10 15:59:16 +0200 | [diff] [blame] | 602 | if (bf->bf_next == NULL && bf_last->bf_state.stale) { |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 603 | struct ath_buf *tbf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 604 | |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 605 | tbf = ath_clone_txbuf(sc, bf_last); |
| 606 | /* |
| 607 | * Update tx baw and complete the |
| 608 | * frame with failed status if we |
| 609 | * run out of tx buf. |
| 610 | */ |
| 611 | if (!tbf) { |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 612 | ath_tx_update_baw(sc, tid, seqno); |
Vasanthakumar Thiagarajan | c41d92d | 2009-07-14 20:17:11 -0400 | [diff] [blame] | 613 | |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 614 | ath_tx_complete_buf(sc, bf, txq, |
| 615 | &bf_head, ts, 0); |
| 616 | bar_index = max_t(int, bar_index, |
| 617 | ATH_BA_INDEX(seq_first, seqno)); |
| 618 | break; |
Vasanthakumar Thiagarajan | c41d92d | 2009-07-14 20:17:11 -0400 | [diff] [blame] | 619 | } |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 620 | |
| 621 | fi->bf = tbf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 622 | } |
| 623 | |
| 624 | /* |
| 625 | * Put this buffer to the temporary pending |
| 626 | * queue to retain ordering |
| 627 | */ |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 628 | __skb_queue_tail(&bf_pending, skb); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 629 | } |
| 630 | |
| 631 | bf = bf_next; |
| 632 | } |
| 633 | |
Felix Fietkau | 4cee786 | 2010-07-23 03:53:16 +0200 | [diff] [blame] | 634 | /* prepend un-acked frames to the beginning of the pending frame queue */ |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 635 | if (!skb_queue_empty(&bf_pending)) { |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 636 | if (an->sleeping) |
Johannes Berg | 042ec45 | 2011-09-29 16:04:26 +0200 | [diff] [blame] | 637 | ieee80211_sta_set_buffered(sta, tid->tidno, true); |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 638 | |
Felix Fietkau | bb195ff | 2013-08-06 14:18:03 +0200 | [diff] [blame] | 639 | skb_queue_splice_tail(&bf_pending, &tid->retry_q); |
Felix Fietkau | 26a6425 | 2011-10-07 02:28:14 +0200 | [diff] [blame] | 640 | if (!an->sleeping) { |
Felix Fietkau | 9af73cf | 2011-08-10 15:23:35 -0600 | [diff] [blame] | 641 | ath_tx_queue_tid(txq, tid); |
Felix Fietkau | 26a6425 | 2011-10-07 02:28:14 +0200 | [diff] [blame] | 642 | |
Sujith Manoharan | adfbda6 | 2012-08-29 09:20:42 +0530 | [diff] [blame] | 643 | if (ts->ts_status & (ATH9K_TXERR_FILT | ATH9K_TXERR_XRETRY)) |
Felix Fietkau | 26a6425 | 2011-10-07 02:28:14 +0200 | [diff] [blame] | 644 | tid->ac->clear_ps_filter = true; |
| 645 | } |
Felix Fietkau | 4cee786 | 2010-07-23 03:53:16 +0200 | [diff] [blame] | 646 | } |
| 647 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 648 | if (bar_index >= 0) { |
| 649 | u16 bar_seq = ATH_BA_INDEX2SEQ(seq_first, bar_index); |
| 650 | |
| 651 | if (BAW_WITHIN(tid->seq_start, tid->baw_size, bar_seq)) |
| 652 | tid->bar_index = ATH_BA_INDEX(tid->seq_start, bar_seq); |
| 653 | |
| 654 | ath_txq_unlock(sc, txq); |
| 655 | ath_send_bar(tid, ATH_BA_INDEX2SEQ(seq_first, bar_index + 1)); |
| 656 | ath_txq_lock(sc, txq); |
| 657 | } |
| 658 | |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 659 | rcu_read_unlock(); |
| 660 | |
Rajkumar Manoharan | 124b979 | 2012-07-17 17:16:42 +0530 | [diff] [blame] | 661 | if (needreset) |
| 662 | ath9k_queue_reset(sc, RESET_TYPE_TX_ERROR); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 663 | } |
| 664 | |
Felix Fietkau | 81b5195 | 2013-01-20 18:51:54 +0100 | [diff] [blame] | 665 | static bool bf_is_ampdu_not_probing(struct ath_buf *bf) |
| 666 | { |
| 667 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(bf->bf_mpdu); |
| 668 | return bf_isampdu(bf) && !(info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE); |
| 669 | } |
| 670 | |
| 671 | static void ath_tx_process_buffer(struct ath_softc *sc, struct ath_txq *txq, |
| 672 | struct ath_tx_status *ts, struct ath_buf *bf, |
| 673 | struct list_head *bf_head) |
| 674 | { |
Felix Fietkau | 0c585dd | 2013-05-17 12:58:25 +0200 | [diff] [blame] | 675 | struct ieee80211_tx_info *info; |
Felix Fietkau | 81b5195 | 2013-01-20 18:51:54 +0100 | [diff] [blame] | 676 | bool txok, flush; |
| 677 | |
| 678 | txok = !(ts->ts_status & ATH9K_TXERR_MASK); |
| 679 | flush = !!(ts->ts_status & ATH9K_TX_FLUSH); |
| 680 | txq->axq_tx_inprogress = false; |
| 681 | |
| 682 | txq->axq_depth--; |
| 683 | if (bf_is_ampdu_not_probing(bf)) |
| 684 | txq->axq_ampdu_depth--; |
| 685 | |
| 686 | if (!bf_isampdu(bf)) { |
Felix Fietkau | 0c585dd | 2013-05-17 12:58:25 +0200 | [diff] [blame] | 687 | if (!flush) { |
| 688 | info = IEEE80211_SKB_CB(bf->bf_mpdu); |
| 689 | memcpy(info->control.rates, bf->rates, |
| 690 | sizeof(info->control.rates)); |
Felix Fietkau | 81b5195 | 2013-01-20 18:51:54 +0100 | [diff] [blame] | 691 | ath_tx_rc_status(sc, bf, ts, 1, txok ? 0 : 1, txok); |
Felix Fietkau | 0c585dd | 2013-05-17 12:58:25 +0200 | [diff] [blame] | 692 | } |
Felix Fietkau | 81b5195 | 2013-01-20 18:51:54 +0100 | [diff] [blame] | 693 | ath_tx_complete_buf(sc, bf, txq, bf_head, ts, txok); |
| 694 | } else |
| 695 | ath_tx_complete_aggr(sc, txq, bf, bf_head, ts, txok); |
| 696 | |
Felix Fietkau | 73364b0 | 2013-08-06 14:18:08 +0200 | [diff] [blame] | 697 | if (!flush) |
Felix Fietkau | 81b5195 | 2013-01-20 18:51:54 +0100 | [diff] [blame] | 698 | ath_txq_schedule(sc, txq); |
| 699 | } |
| 700 | |
Rajkumar Manoharan | 1a6e9d0 | 2011-08-23 12:32:57 +0530 | [diff] [blame] | 701 | static bool ath_lookup_legacy(struct ath_buf *bf) |
| 702 | { |
| 703 | struct sk_buff *skb; |
| 704 | struct ieee80211_tx_info *tx_info; |
| 705 | struct ieee80211_tx_rate *rates; |
| 706 | int i; |
| 707 | |
| 708 | skb = bf->bf_mpdu; |
| 709 | tx_info = IEEE80211_SKB_CB(skb); |
| 710 | rates = tx_info->control.rates; |
| 711 | |
Felix Fietkau | 059ee09 | 2011-08-27 10:25:27 +0200 | [diff] [blame] | 712 | for (i = 0; i < 4; i++) { |
| 713 | if (!rates[i].count || rates[i].idx < 0) |
| 714 | break; |
| 715 | |
Rajkumar Manoharan | 1a6e9d0 | 2011-08-23 12:32:57 +0530 | [diff] [blame] | 716 | if (!(rates[i].flags & IEEE80211_TX_RC_MCS)) |
| 717 | return true; |
| 718 | } |
| 719 | |
| 720 | return false; |
| 721 | } |
| 722 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 723 | static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf, |
| 724 | struct ath_atx_tid *tid) |
| 725 | { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 726 | struct sk_buff *skb; |
| 727 | struct ieee80211_tx_info *tx_info; |
| 728 | struct ieee80211_tx_rate *rates; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 729 | u32 max_4ms_framelen, frmlen; |
Sujith Manoharan | c0ac53f | 2012-02-22 12:40:38 +0530 | [diff] [blame] | 730 | u16 aggr_limit, bt_aggr_limit, legacy = 0; |
Felix Fietkau | aa5955c | 2012-07-15 19:53:36 +0200 | [diff] [blame] | 731 | int q = tid->ac->txq->mac80211_qnum; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 732 | int i; |
| 733 | |
Sujith | a22be22 | 2009-03-30 15:28:36 +0530 | [diff] [blame] | 734 | skb = bf->bf_mpdu; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 735 | tx_info = IEEE80211_SKB_CB(skb); |
Felix Fietkau | 0c585dd | 2013-05-17 12:58:25 +0200 | [diff] [blame] | 736 | rates = bf->rates; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 737 | |
| 738 | /* |
| 739 | * 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] | 740 | * 4ms (or TXOP limited) transmit duration. |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 741 | */ |
| 742 | max_4ms_framelen = ATH_AMPDU_LIMIT_MAX; |
| 743 | |
| 744 | for (i = 0; i < 4; i++) { |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 745 | int modeidx; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 746 | |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 747 | if (!rates[i].count) |
| 748 | continue; |
Felix Fietkau | 0e668cd | 2010-04-19 19:57:32 +0200 | [diff] [blame] | 749 | |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 750 | if (!(rates[i].flags & IEEE80211_TX_RC_MCS)) { |
| 751 | legacy = 1; |
| 752 | break; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 753 | } |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 754 | |
| 755 | if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) |
| 756 | modeidx = MCS_HT40; |
| 757 | else |
| 758 | modeidx = MCS_HT20; |
| 759 | |
| 760 | if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI) |
| 761 | modeidx++; |
| 762 | |
Felix Fietkau | aa5955c | 2012-07-15 19:53:36 +0200 | [diff] [blame] | 763 | frmlen = sc->tx.max_aggr_framelen[q][modeidx][rates[i].idx]; |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 764 | max_4ms_framelen = min(max_4ms_framelen, frmlen); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 765 | } |
| 766 | |
| 767 | /* |
| 768 | * limit aggregate size by the minimum rate if rate selected is |
| 769 | * not a probe rate, if rate selected is a probe rate then |
| 770 | * avoid aggregation of this packet. |
| 771 | */ |
| 772 | if (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE || legacy) |
| 773 | return 0; |
| 774 | |
Sujith Manoharan | c0ac53f | 2012-02-22 12:40:38 +0530 | [diff] [blame] | 775 | aggr_limit = min(max_4ms_framelen, (u32)ATH_AMPDU_LIMIT_MAX); |
| 776 | |
| 777 | /* |
| 778 | * Override the default aggregation limit for BTCOEX. |
| 779 | */ |
| 780 | bt_aggr_limit = ath9k_btcoex_aggr_limit(sc, max_4ms_framelen); |
| 781 | if (bt_aggr_limit) |
| 782 | aggr_limit = bt_aggr_limit; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 783 | |
| 784 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 785 | * h/w can accept aggregates up to 16 bit lengths (65535). |
| 786 | * The IE, however can hold up to 65536, which shows up here |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 787 | * as zero. Ignore 65536 since we are constrained by hw. |
| 788 | */ |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 789 | if (tid->an->maxampdu) |
| 790 | aggr_limit = min(aggr_limit, tid->an->maxampdu); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 791 | |
| 792 | return aggr_limit; |
| 793 | } |
| 794 | |
| 795 | /* |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 796 | * Returns the number of delimiters to be added to |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 797 | * meet the minimum required mpdudensity. |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 798 | */ |
| 799 | 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] | 800 | struct ath_buf *bf, u16 frmlen, |
| 801 | bool first_subfrm) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 802 | { |
Rajkumar Manoharan | 7a12dfd | 2011-08-13 10:28:08 +0530 | [diff] [blame] | 803 | #define FIRST_DESC_NDELIMS 60 |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 804 | u32 nsymbits, nsymbols; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 805 | u16 minlen; |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 806 | u8 flags, rix; |
Felix Fietkau | c666387 | 2010-04-19 19:57:33 +0200 | [diff] [blame] | 807 | int width, streams, half_gi, ndelim, mindelim; |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 808 | struct ath_frame_info *fi = get_frame_info(bf->bf_mpdu); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 809 | |
| 810 | /* Select standard number of delimiters based on frame length alone */ |
| 811 | ndelim = ATH_AGGR_GET_NDELIM(frmlen); |
| 812 | |
| 813 | /* |
| 814 | * If encryption enabled, hardware requires some more padding between |
| 815 | * subframes. |
| 816 | * TODO - this could be improved to be dependent on the rate. |
| 817 | * The hardware can keep up at lower rates, but not higher rates |
| 818 | */ |
Rajkumar Manoharan | 4f6760b | 2011-07-01 18:37:33 +0530 | [diff] [blame] | 819 | if ((fi->keyix != ATH9K_TXKEYIX_INVALID) && |
| 820 | !(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 821 | ndelim += ATH_AGGR_ENCRYPTDELIM; |
| 822 | |
| 823 | /* |
Rajkumar Manoharan | 7a12dfd | 2011-08-13 10:28:08 +0530 | [diff] [blame] | 824 | * Add delimiter when using RTS/CTS with aggregation |
| 825 | * and non enterprise AR9003 card |
| 826 | */ |
Felix Fietkau | 3459731 | 2011-08-29 18:57:54 +0200 | [diff] [blame] | 827 | if (first_subfrm && !AR_SREV_9580_10_OR_LATER(sc->sc_ah) && |
| 828 | (sc->sc_ah->ent_mode & AR_ENT_OTP_MIN_PKT_SIZE_DISABLE)) |
Rajkumar Manoharan | 7a12dfd | 2011-08-13 10:28:08 +0530 | [diff] [blame] | 829 | ndelim = max(ndelim, FIRST_DESC_NDELIMS); |
| 830 | |
| 831 | /* |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 832 | * Convert desired mpdu density from microeconds to bytes based |
| 833 | * on highest rate in rate series (i.e. first rate) to determine |
| 834 | * required minimum length for subframe. Take into account |
| 835 | * whether high rate is 20 or 40Mhz and half or full GI. |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 836 | * |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 837 | * If there is no mpdu density restriction, no further calculation |
| 838 | * is needed. |
| 839 | */ |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 840 | |
| 841 | if (tid->an->mpdudensity == 0) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 842 | return ndelim; |
| 843 | |
Felix Fietkau | 79acac0 | 2013-04-22 23:11:44 +0200 | [diff] [blame] | 844 | rix = bf->rates[0].idx; |
| 845 | flags = bf->rates[0].flags; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 846 | width = (flags & IEEE80211_TX_RC_40_MHZ_WIDTH) ? 1 : 0; |
| 847 | half_gi = (flags & IEEE80211_TX_RC_SHORT_GI) ? 1 : 0; |
| 848 | |
| 849 | if (half_gi) |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 850 | nsymbols = NUM_SYMBOLS_PER_USEC_HALFGI(tid->an->mpdudensity); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 851 | else |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 852 | nsymbols = NUM_SYMBOLS_PER_USEC(tid->an->mpdudensity); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 853 | |
| 854 | if (nsymbols == 0) |
| 855 | nsymbols = 1; |
| 856 | |
Felix Fietkau | c666387 | 2010-04-19 19:57:33 +0200 | [diff] [blame] | 857 | streams = HT_RC_2_STREAMS(rix); |
| 858 | nsymbits = bits_per_symbol[rix % 8][width] * streams; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 859 | minlen = (nsymbols * nsymbits) / BITS_PER_BYTE; |
| 860 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 861 | if (frmlen < minlen) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 862 | mindelim = (minlen - frmlen) / ATH_AGGR_DELIM_SZ; |
| 863 | ndelim = max(mindelim, ndelim); |
| 864 | } |
| 865 | |
| 866 | return ndelim; |
| 867 | } |
| 868 | |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 869 | static struct ath_buf * |
| 870 | ath_tx_get_tid_subframe(struct ath_softc *sc, struct ath_txq *txq, |
Felix Fietkau | a7586ee | 2013-08-06 14:18:02 +0200 | [diff] [blame] | 871 | struct ath_atx_tid *tid, struct sk_buff_head **q) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 872 | { |
Felix Fietkau | 73364b0 | 2013-08-06 14:18:08 +0200 | [diff] [blame] | 873 | struct ieee80211_tx_info *tx_info; |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 874 | struct ath_frame_info *fi; |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 875 | struct sk_buff *skb; |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 876 | struct ath_buf *bf; |
Felix Fietkau | 6a0ddae | 2011-08-28 00:32:23 +0200 | [diff] [blame] | 877 | u16 seqno; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 878 | |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 879 | while (1) { |
Felix Fietkau | bb195ff | 2013-08-06 14:18:03 +0200 | [diff] [blame] | 880 | *q = &tid->retry_q; |
| 881 | if (skb_queue_empty(*q)) |
| 882 | *q = &tid->buf_q; |
| 883 | |
Felix Fietkau | a7586ee | 2013-08-06 14:18:02 +0200 | [diff] [blame] | 884 | skb = skb_peek(*q); |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 885 | if (!skb) |
| 886 | break; |
| 887 | |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 888 | fi = get_frame_info(skb); |
| 889 | bf = fi->bf; |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 890 | if (!fi->bf) |
Felix Fietkau | 249ee72 | 2012-10-03 21:07:52 +0200 | [diff] [blame] | 891 | bf = ath_tx_setup_buffer(sc, txq, tid, skb); |
Felix Fietkau | 563299d | 2013-08-13 12:33:30 +0200 | [diff] [blame] | 892 | else |
| 893 | bf->bf_state.stale = false; |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 894 | |
Felix Fietkau | 249ee72 | 2012-10-03 21:07:52 +0200 | [diff] [blame] | 895 | if (!bf) { |
Felix Fietkau | a7586ee | 2013-08-06 14:18:02 +0200 | [diff] [blame] | 896 | __skb_unlink(skb, *q); |
Felix Fietkau | a4943cc | 2013-06-30 12:02:13 +0200 | [diff] [blame] | 897 | ath_txq_skb_done(sc, txq, skb); |
Felix Fietkau | 249ee72 | 2012-10-03 21:07:52 +0200 | [diff] [blame] | 898 | ieee80211_free_txskb(sc->hw, skb); |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 899 | continue; |
Felix Fietkau | 249ee72 | 2012-10-03 21:07:52 +0200 | [diff] [blame] | 900 | } |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 901 | |
Felix Fietkau | 73364b0 | 2013-08-06 14:18:08 +0200 | [diff] [blame] | 902 | bf->bf_next = NULL; |
| 903 | bf->bf_lastbf = bf; |
| 904 | |
| 905 | tx_info = IEEE80211_SKB_CB(skb); |
| 906 | tx_info->flags &= ~IEEE80211_TX_CTL_CLEAR_PS_FILT; |
| 907 | if (!(tx_info->flags & IEEE80211_TX_CTL_AMPDU)) { |
| 908 | bf->bf_state.bf_type = 0; |
| 909 | return bf; |
| 910 | } |
| 911 | |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 912 | bf->bf_state.bf_type = BUF_AMPDU | BUF_AGGR; |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 913 | seqno = bf->bf_state.seqno; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 914 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 915 | /* do not step over block-ack window */ |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 916 | if (!BAW_WITHIN(tid->seq_start, tid->baw_size, seqno)) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 917 | break; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 918 | |
Felix Fietkau | f943754 | 2011-12-14 22:08:08 +0100 | [diff] [blame] | 919 | if (tid->bar_index > ATH_BA_INDEX(tid->seq_start, seqno)) { |
| 920 | struct ath_tx_status ts = {}; |
| 921 | struct list_head bf_head; |
| 922 | |
| 923 | INIT_LIST_HEAD(&bf_head); |
| 924 | list_add(&bf->list, &bf_head); |
Felix Fietkau | a7586ee | 2013-08-06 14:18:02 +0200 | [diff] [blame] | 925 | __skb_unlink(skb, *q); |
Felix Fietkau | f943754 | 2011-12-14 22:08:08 +0100 | [diff] [blame] | 926 | ath_tx_update_baw(sc, tid, seqno); |
| 927 | ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0); |
| 928 | continue; |
| 929 | } |
| 930 | |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 931 | return bf; |
| 932 | } |
| 933 | |
| 934 | return NULL; |
| 935 | } |
| 936 | |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 937 | static bool |
| 938 | ath_tx_form_aggr(struct ath_softc *sc, struct ath_txq *txq, |
| 939 | struct ath_atx_tid *tid, struct list_head *bf_q, |
| 940 | struct ath_buf *bf_first, struct sk_buff_head *tid_q, |
| 941 | int *aggr_len) |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 942 | { |
| 943 | #define PADBYTES(_len) ((4 - ((_len) % 4)) % 4) |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 944 | struct ath_buf *bf = bf_first, *bf_prev = NULL; |
Felix Fietkau | a1cd94d | 2013-08-06 14:18:06 +0200 | [diff] [blame] | 945 | int nframes = 0, ndelim; |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 946 | u16 aggr_limit = 0, al = 0, bpad = 0, |
Felix Fietkau | a1cd94d | 2013-08-06 14:18:06 +0200 | [diff] [blame] | 947 | al_delta, h_baw = tid->baw_size / 2; |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 948 | struct ieee80211_tx_info *tx_info; |
| 949 | struct ath_frame_info *fi; |
| 950 | struct sk_buff *skb; |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 951 | bool closed = false; |
| 952 | |
| 953 | bf = bf_first; |
| 954 | aggr_limit = ath_lookup_rate(sc, bf, tid); |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 955 | |
| 956 | do { |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 957 | skb = bf->bf_mpdu; |
| 958 | fi = get_frame_info(skb); |
| 959 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 960 | /* do not exceed aggregation limit */ |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 961 | al_delta = ATH_AGGR_DELIM_SZ + fi->framelen; |
Felix Fietkau | a1cd94d | 2013-08-06 14:18:06 +0200 | [diff] [blame] | 962 | if (nframes) { |
| 963 | if (aggr_limit < al + bpad + al_delta || |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 964 | ath_lookup_legacy(bf) || nframes >= h_baw) |
Felix Fietkau | a1cd94d | 2013-08-06 14:18:06 +0200 | [diff] [blame] | 965 | break; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 966 | |
Felix Fietkau | a1cd94d | 2013-08-06 14:18:06 +0200 | [diff] [blame] | 967 | tx_info = IEEE80211_SKB_CB(bf->bf_mpdu); |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 968 | if ((tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) || |
| 969 | !(tx_info->flags & IEEE80211_TX_CTL_AMPDU)) |
Felix Fietkau | a1cd94d | 2013-08-06 14:18:06 +0200 | [diff] [blame] | 970 | break; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 971 | } |
| 972 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 973 | /* add padding for previous frame to aggregation length */ |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 974 | al += bpad + al_delta; |
| 975 | |
| 976 | /* |
| 977 | * Get the delimiters needed to meet the MPDU |
| 978 | * density for this node. |
| 979 | */ |
Rajkumar Manoharan | 7a12dfd | 2011-08-13 10:28:08 +0530 | [diff] [blame] | 980 | ndelim = ath_compute_num_delims(sc, tid, bf_first, fi->framelen, |
| 981 | !nframes); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 982 | bpad = PADBYTES(al_delta) + (ndelim << 2); |
| 983 | |
Rajkumar Manoharan | 7a12dfd | 2011-08-13 10:28:08 +0530 | [diff] [blame] | 984 | nframes++; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 985 | bf->bf_next = NULL; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 986 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 987 | /* link buffers of this frame to the aggregate */ |
Felix Fietkau | 8fed140 | 2013-08-06 14:18:07 +0200 | [diff] [blame] | 988 | if (!fi->baw_tracked) |
| 989 | ath_tx_addto_baw(sc, tid, bf); |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 990 | bf->bf_state.ndelim = ndelim; |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 991 | |
Felix Fietkau | a7586ee | 2013-08-06 14:18:02 +0200 | [diff] [blame] | 992 | __skb_unlink(skb, tid_q); |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 993 | list_add_tail(&bf->list, bf_q); |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 994 | if (bf_prev) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 995 | bf_prev->bf_next = bf; |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 996 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 997 | bf_prev = bf; |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 998 | |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 999 | bf = ath_tx_get_tid_subframe(sc, txq, tid, &tid_q); |
| 1000 | if (!bf) { |
| 1001 | closed = true; |
| 1002 | break; |
| 1003 | } |
Felix Fietkau | a7586ee | 2013-08-06 14:18:02 +0200 | [diff] [blame] | 1004 | } while (ath_tid_has_buffered(tid)); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1005 | |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 1006 | bf = bf_first; |
| 1007 | bf->bf_lastbf = bf_prev; |
| 1008 | |
| 1009 | if (bf == bf_prev) { |
| 1010 | al = get_frame_info(bf->bf_mpdu)->framelen; |
| 1011 | bf->bf_state.bf_type = BUF_AMPDU; |
| 1012 | } else { |
| 1013 | TX_STAT_INC(txq->axq_qnum, a_aggr); |
| 1014 | } |
| 1015 | |
Felix Fietkau | 269c44b | 2010-11-14 15:20:06 +0100 | [diff] [blame] | 1016 | *aggr_len = al; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 1017 | |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 1018 | return closed; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1019 | #undef PADBYTES |
| 1020 | } |
| 1021 | |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1022 | /* |
| 1023 | * rix - rate index |
| 1024 | * pktlen - total bytes (delims + data + fcs + pads + pad delims) |
| 1025 | * width - 0 for 20 MHz, 1 for 40 MHz |
| 1026 | * half_gi - to use 4us v/s 3.6 us for symbol time |
| 1027 | */ |
| 1028 | static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, int pktlen, |
| 1029 | int width, int half_gi, bool shortPreamble) |
| 1030 | { |
| 1031 | u32 nbits, nsymbits, duration, nsymbols; |
| 1032 | int streams; |
| 1033 | |
| 1034 | /* find number of symbols: PLCP + data */ |
| 1035 | streams = HT_RC_2_STREAMS(rix); |
| 1036 | nbits = (pktlen << 3) + OFDM_PLCP_BITS; |
| 1037 | nsymbits = bits_per_symbol[rix % 8][width] * streams; |
| 1038 | nsymbols = (nbits + nsymbits - 1) / nsymbits; |
| 1039 | |
| 1040 | if (!half_gi) |
| 1041 | duration = SYMBOL_TIME(nsymbols); |
| 1042 | else |
| 1043 | duration = SYMBOL_TIME_HALFGI(nsymbols); |
| 1044 | |
| 1045 | /* addup duration for legacy/ht training and signal fields */ |
| 1046 | duration += L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams); |
| 1047 | |
| 1048 | return duration; |
| 1049 | } |
| 1050 | |
Felix Fietkau | aa5955c | 2012-07-15 19:53:36 +0200 | [diff] [blame] | 1051 | static int ath_max_framelen(int usec, int mcs, bool ht40, bool sgi) |
| 1052 | { |
| 1053 | int streams = HT_RC_2_STREAMS(mcs); |
| 1054 | int symbols, bits; |
| 1055 | int bytes = 0; |
| 1056 | |
| 1057 | symbols = sgi ? TIME_SYMBOLS_HALFGI(usec) : TIME_SYMBOLS(usec); |
| 1058 | bits = symbols * bits_per_symbol[mcs % 8][ht40] * streams; |
| 1059 | bits -= OFDM_PLCP_BITS; |
| 1060 | bytes = bits / 8; |
| 1061 | bytes -= L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams); |
| 1062 | if (bytes > 65532) |
| 1063 | bytes = 65532; |
| 1064 | |
| 1065 | return bytes; |
| 1066 | } |
| 1067 | |
| 1068 | void ath_update_max_aggr_framelen(struct ath_softc *sc, int queue, int txop) |
| 1069 | { |
| 1070 | u16 *cur_ht20, *cur_ht20_sgi, *cur_ht40, *cur_ht40_sgi; |
| 1071 | int mcs; |
| 1072 | |
| 1073 | /* 4ms is the default (and maximum) duration */ |
| 1074 | if (!txop || txop > 4096) |
| 1075 | txop = 4096; |
| 1076 | |
| 1077 | cur_ht20 = sc->tx.max_aggr_framelen[queue][MCS_HT20]; |
| 1078 | cur_ht20_sgi = sc->tx.max_aggr_framelen[queue][MCS_HT20_SGI]; |
| 1079 | cur_ht40 = sc->tx.max_aggr_framelen[queue][MCS_HT40]; |
| 1080 | cur_ht40_sgi = sc->tx.max_aggr_framelen[queue][MCS_HT40_SGI]; |
| 1081 | for (mcs = 0; mcs < 32; mcs++) { |
| 1082 | cur_ht20[mcs] = ath_max_framelen(txop, mcs, false, false); |
| 1083 | cur_ht20_sgi[mcs] = ath_max_framelen(txop, mcs, false, true); |
| 1084 | cur_ht40[mcs] = ath_max_framelen(txop, mcs, true, false); |
| 1085 | cur_ht40_sgi[mcs] = ath_max_framelen(txop, mcs, true, true); |
| 1086 | } |
| 1087 | } |
| 1088 | |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1089 | static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf, |
Sujith Manoharan | a3835e9 | 2013-07-04 12:59:47 +0530 | [diff] [blame] | 1090 | struct ath_tx_info *info, int len, bool rts) |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1091 | { |
| 1092 | struct ath_hw *ah = sc->sc_ah; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1093 | struct sk_buff *skb; |
| 1094 | struct ieee80211_tx_info *tx_info; |
| 1095 | struct ieee80211_tx_rate *rates; |
| 1096 | const struct ieee80211_rate *rate; |
| 1097 | struct ieee80211_hdr *hdr; |
Felix Fietkau | 80b08a8 | 2012-06-15 03:04:53 +0200 | [diff] [blame] | 1098 | struct ath_frame_info *fi = get_frame_info(bf->bf_mpdu); |
Sujith Manoharan | a3835e9 | 2013-07-04 12:59:47 +0530 | [diff] [blame] | 1099 | u32 rts_thresh = sc->hw->wiphy->rts_threshold; |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1100 | int i; |
| 1101 | u8 rix = 0; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1102 | |
| 1103 | skb = bf->bf_mpdu; |
| 1104 | tx_info = IEEE80211_SKB_CB(skb); |
Felix Fietkau | 79acac0 | 2013-04-22 23:11:44 +0200 | [diff] [blame] | 1105 | rates = bf->rates; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1106 | hdr = (struct ieee80211_hdr *)skb->data; |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1107 | |
| 1108 | /* set dur_update_en for l-sig computation except for PS-Poll frames */ |
| 1109 | info->dur_update = !ieee80211_is_pspoll(hdr->frame_control); |
Felix Fietkau | 80b08a8 | 2012-06-15 03:04:53 +0200 | [diff] [blame] | 1110 | info->rtscts_rate = fi->rtscts_rate; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1111 | |
Felix Fietkau | 79acac0 | 2013-04-22 23:11:44 +0200 | [diff] [blame] | 1112 | for (i = 0; i < ARRAY_SIZE(bf->rates); i++) { |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1113 | bool is_40, is_sgi, is_sp; |
| 1114 | int phy; |
| 1115 | |
| 1116 | if (!rates[i].count || (rates[i].idx < 0)) |
| 1117 | continue; |
| 1118 | |
| 1119 | rix = rates[i].idx; |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1120 | info->rates[i].Tries = rates[i].count; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1121 | |
Sujith Manoharan | a3835e9 | 2013-07-04 12:59:47 +0530 | [diff] [blame] | 1122 | /* |
| 1123 | * Handle RTS threshold for unaggregated HT frames. |
| 1124 | */ |
| 1125 | if (bf_isampdu(bf) && !bf_isaggr(bf) && |
| 1126 | (rates[i].flags & IEEE80211_TX_RC_MCS) && |
| 1127 | unlikely(rts_thresh != (u32) -1)) { |
| 1128 | if (!rts_thresh || (len > rts_thresh)) |
| 1129 | rts = true; |
| 1130 | } |
| 1131 | |
| 1132 | if (rts || rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) { |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1133 | info->rates[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; |
| 1134 | info->flags |= ATH9K_TXDESC_RTSENA; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1135 | } else if (rates[i].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1136 | info->rates[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; |
| 1137 | info->flags |= ATH9K_TXDESC_CTSENA; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1138 | } |
| 1139 | |
| 1140 | if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1141 | info->rates[i].RateFlags |= ATH9K_RATESERIES_2040; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1142 | if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI) |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1143 | info->rates[i].RateFlags |= ATH9K_RATESERIES_HALFGI; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1144 | |
| 1145 | is_sgi = !!(rates[i].flags & IEEE80211_TX_RC_SHORT_GI); |
| 1146 | is_40 = !!(rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH); |
| 1147 | is_sp = !!(rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE); |
| 1148 | |
| 1149 | if (rates[i].flags & IEEE80211_TX_RC_MCS) { |
| 1150 | /* MCS rates */ |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1151 | info->rates[i].Rate = rix | 0x80; |
| 1152 | info->rates[i].ChSel = ath_txchainmask_reduction(sc, |
| 1153 | ah->txchainmask, info->rates[i].Rate); |
| 1154 | info->rates[i].PktDuration = ath_pkt_duration(sc, rix, len, |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1155 | is_40, is_sgi, is_sp); |
| 1156 | if (rix < 8 && (tx_info->flags & IEEE80211_TX_CTL_STBC)) |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1157 | info->rates[i].RateFlags |= ATH9K_RATESERIES_STBC; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1158 | continue; |
| 1159 | } |
| 1160 | |
| 1161 | /* legacy rates */ |
Felix Fietkau | 76591be | 2012-06-15 03:04:52 +0200 | [diff] [blame] | 1162 | rate = &sc->sbands[tx_info->band].bitrates[rates[i].idx]; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1163 | if ((tx_info->band == IEEE80211_BAND_2GHZ) && |
| 1164 | !(rate->flags & IEEE80211_RATE_ERP_G)) |
| 1165 | phy = WLAN_RC_PHY_CCK; |
| 1166 | else |
| 1167 | phy = WLAN_RC_PHY_OFDM; |
| 1168 | |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1169 | info->rates[i].Rate = rate->hw_value; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1170 | if (rate->hw_value_short) { |
| 1171 | if (rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1172 | info->rates[i].Rate |= rate->hw_value_short; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1173 | } else { |
| 1174 | is_sp = false; |
| 1175 | } |
| 1176 | |
| 1177 | if (bf->bf_state.bfs_paprd) |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1178 | info->rates[i].ChSel = ah->txchainmask; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1179 | else |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1180 | info->rates[i].ChSel = ath_txchainmask_reduction(sc, |
| 1181 | ah->txchainmask, info->rates[i].Rate); |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1182 | |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1183 | info->rates[i].PktDuration = ath9k_hw_computetxtime(sc->sc_ah, |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1184 | phy, rate->bitrate * 100, len, rix, is_sp); |
| 1185 | } |
| 1186 | |
| 1187 | /* For AR5416 - RTS cannot be followed by a frame larger than 8K */ |
| 1188 | if (bf_isaggr(bf) && (len > sc->sc_ah->caps.rts_aggr_limit)) |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1189 | info->flags &= ~ATH9K_TXDESC_RTSENA; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1190 | |
| 1191 | /* ATH9K_TXDESC_RTSENA and ATH9K_TXDESC_CTSENA are mutually exclusive. */ |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1192 | if (info->flags & ATH9K_TXDESC_RTSENA) |
| 1193 | info->flags &= ~ATH9K_TXDESC_CTSENA; |
Felix Fietkau | 38dad7b | 2011-09-14 21:24:18 +0200 | [diff] [blame] | 1194 | } |
| 1195 | |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1196 | static enum ath9k_pkt_type get_hw_packet_type(struct sk_buff *skb) |
| 1197 | { |
| 1198 | struct ieee80211_hdr *hdr; |
| 1199 | enum ath9k_pkt_type htype; |
| 1200 | __le16 fc; |
| 1201 | |
| 1202 | hdr = (struct ieee80211_hdr *)skb->data; |
| 1203 | fc = hdr->frame_control; |
| 1204 | |
| 1205 | if (ieee80211_is_beacon(fc)) |
| 1206 | htype = ATH9K_PKT_TYPE_BEACON; |
| 1207 | else if (ieee80211_is_probe_resp(fc)) |
| 1208 | htype = ATH9K_PKT_TYPE_PROBE_RESP; |
| 1209 | else if (ieee80211_is_atim(fc)) |
| 1210 | htype = ATH9K_PKT_TYPE_ATIM; |
| 1211 | else if (ieee80211_is_pspoll(fc)) |
| 1212 | htype = ATH9K_PKT_TYPE_PSPOLL; |
| 1213 | else |
| 1214 | htype = ATH9K_PKT_TYPE_NORMAL; |
| 1215 | |
| 1216 | return htype; |
| 1217 | } |
| 1218 | |
| 1219 | static void ath_tx_fill_desc(struct ath_softc *sc, struct ath_buf *bf, |
| 1220 | struct ath_txq *txq, int len) |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1221 | { |
| 1222 | struct ath_hw *ah = sc->sc_ah; |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 1223 | struct ath_buf *bf_first = NULL; |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1224 | struct ath_tx_info info; |
Sujith Manoharan | a3835e9 | 2013-07-04 12:59:47 +0530 | [diff] [blame] | 1225 | u32 rts_thresh = sc->hw->wiphy->rts_threshold; |
| 1226 | bool rts = false; |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1227 | |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1228 | memset(&info, 0, sizeof(info)); |
| 1229 | info.is_first = true; |
| 1230 | info.is_last = true; |
| 1231 | info.txpower = MAX_RATE_POWER; |
| 1232 | info.qcu = txq->axq_qnum; |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1233 | |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1234 | while (bf) { |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1235 | struct sk_buff *skb = bf->bf_mpdu; |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 1236 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1237 | struct ath_frame_info *fi = get_frame_info(skb); |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 1238 | bool aggr = !!(bf->bf_state.bf_type & BUF_AGGR); |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1239 | |
| 1240 | info.type = get_hw_packet_type(skb); |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1241 | if (bf->bf_next) |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1242 | info.link = bf->bf_next->bf_daddr; |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1243 | else |
Luis R. Rodriguez | 89f927a | 2013-10-14 17:42:11 -0700 | [diff] [blame] | 1244 | info.link = (sc->tx99_state) ? bf->bf_daddr : 0; |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1245 | |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 1246 | if (!bf_first) { |
| 1247 | bf_first = bf; |
| 1248 | |
Luis R. Rodriguez | 89f927a | 2013-10-14 17:42:11 -0700 | [diff] [blame] | 1249 | if (!sc->tx99_state) |
| 1250 | info.flags = ATH9K_TXDESC_INTREQ; |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 1251 | if ((tx_info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT) || |
| 1252 | txq == sc->tx.uapsdq) |
| 1253 | info.flags |= ATH9K_TXDESC_CLRDMASK; |
| 1254 | |
| 1255 | if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK) |
| 1256 | info.flags |= ATH9K_TXDESC_NOACK; |
| 1257 | if (tx_info->flags & IEEE80211_TX_CTL_LDPC) |
| 1258 | info.flags |= ATH9K_TXDESC_LDPC; |
| 1259 | |
| 1260 | if (bf->bf_state.bfs_paprd) |
| 1261 | info.flags |= (u32) bf->bf_state.bfs_paprd << |
| 1262 | ATH9K_TXDESC_PAPRD_S; |
| 1263 | |
Sujith Manoharan | a3835e9 | 2013-07-04 12:59:47 +0530 | [diff] [blame] | 1264 | /* |
| 1265 | * mac80211 doesn't handle RTS threshold for HT because |
| 1266 | * the decision has to be taken based on AMPDU length |
| 1267 | * and aggregation is done entirely inside ath9k. |
| 1268 | * Set the RTS/CTS flag for the first subframe based |
| 1269 | * on the threshold. |
| 1270 | */ |
| 1271 | if (aggr && (bf == bf_first) && |
| 1272 | unlikely(rts_thresh != (u32) -1)) { |
| 1273 | /* |
| 1274 | * "len" is the size of the entire AMPDU. |
| 1275 | */ |
| 1276 | if (!rts_thresh || (len > rts_thresh)) |
| 1277 | rts = true; |
| 1278 | } |
| 1279 | ath_buf_set_rate(sc, bf, &info, len, rts); |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 1280 | } |
| 1281 | |
John W. Linville | 42cecc3 | 2011-09-19 15:42:31 -0400 | [diff] [blame] | 1282 | info.buf_addr[0] = bf->bf_buf_addr; |
| 1283 | info.buf_len[0] = skb->len; |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1284 | info.pkt_len = fi->framelen; |
| 1285 | info.keyix = fi->keyix; |
| 1286 | info.keytype = fi->keytype; |
| 1287 | |
| 1288 | if (aggr) { |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1289 | if (bf == bf_first) |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1290 | info.aggr = AGGR_BUF_FIRST; |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 1291 | else if (bf == bf_first->bf_lastbf) |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1292 | info.aggr = AGGR_BUF_LAST; |
| 1293 | else |
| 1294 | info.aggr = AGGR_BUF_MIDDLE; |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1295 | |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1296 | info.ndelim = bf->bf_state.ndelim; |
| 1297 | info.aggr_len = len; |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1298 | } |
| 1299 | |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 1300 | if (bf == bf_first->bf_lastbf) |
| 1301 | bf_first = NULL; |
| 1302 | |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1303 | ath9k_hw_set_txdesc(ah, bf->bf_desc, &info); |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1304 | bf = bf->bf_next; |
| 1305 | } |
| 1306 | } |
| 1307 | |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 1308 | static void |
| 1309 | ath_tx_form_burst(struct ath_softc *sc, struct ath_txq *txq, |
| 1310 | struct ath_atx_tid *tid, struct list_head *bf_q, |
| 1311 | struct ath_buf *bf_first, struct sk_buff_head *tid_q) |
| 1312 | { |
| 1313 | struct ath_buf *bf = bf_first, *bf_prev = NULL; |
| 1314 | struct sk_buff *skb; |
| 1315 | int nframes = 0; |
| 1316 | |
| 1317 | do { |
| 1318 | struct ieee80211_tx_info *tx_info; |
| 1319 | skb = bf->bf_mpdu; |
| 1320 | |
| 1321 | nframes++; |
| 1322 | __skb_unlink(skb, tid_q); |
| 1323 | list_add_tail(&bf->list, bf_q); |
| 1324 | if (bf_prev) |
| 1325 | bf_prev->bf_next = bf; |
| 1326 | bf_prev = bf; |
| 1327 | |
| 1328 | if (nframes >= 2) |
| 1329 | break; |
| 1330 | |
| 1331 | bf = ath_tx_get_tid_subframe(sc, txq, tid, &tid_q); |
| 1332 | if (!bf) |
| 1333 | break; |
| 1334 | |
| 1335 | tx_info = IEEE80211_SKB_CB(bf->bf_mpdu); |
| 1336 | if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) |
| 1337 | break; |
| 1338 | |
| 1339 | ath_set_rates(tid->an->vif, tid->an->sta, bf); |
| 1340 | } while (1); |
| 1341 | } |
| 1342 | |
Felix Fietkau | 020f20f | 2013-08-06 14:18:12 +0200 | [diff] [blame] | 1343 | static bool ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq, |
| 1344 | struct ath_atx_tid *tid, bool *stop) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1345 | { |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 1346 | struct ath_buf *bf; |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1347 | struct ieee80211_tx_info *tx_info; |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 1348 | struct sk_buff_head *tid_q; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1349 | struct list_head bf_q; |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 1350 | int aggr_len = 0; |
| 1351 | bool aggr, last = true; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1352 | |
Felix Fietkau | 020f20f | 2013-08-06 14:18:12 +0200 | [diff] [blame] | 1353 | if (!ath_tid_has_buffered(tid)) |
| 1354 | return false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1355 | |
Felix Fietkau | 020f20f | 2013-08-06 14:18:12 +0200 | [diff] [blame] | 1356 | INIT_LIST_HEAD(&bf_q); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1357 | |
Felix Fietkau | 020f20f | 2013-08-06 14:18:12 +0200 | [diff] [blame] | 1358 | bf = ath_tx_get_tid_subframe(sc, txq, tid, &tid_q); |
| 1359 | if (!bf) |
| 1360 | return false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1361 | |
Felix Fietkau | 020f20f | 2013-08-06 14:18:12 +0200 | [diff] [blame] | 1362 | tx_info = IEEE80211_SKB_CB(bf->bf_mpdu); |
| 1363 | aggr = !!(tx_info->flags & IEEE80211_TX_CTL_AMPDU); |
| 1364 | if ((aggr && txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) || |
| 1365 | (!aggr && txq->axq_depth >= ATH_NON_AGGR_MIN_QDEPTH)) { |
| 1366 | *stop = true; |
| 1367 | return false; |
| 1368 | } |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 1369 | |
Felix Fietkau | 020f20f | 2013-08-06 14:18:12 +0200 | [diff] [blame] | 1370 | ath_set_rates(tid->an->vif, tid->an->sta, bf); |
| 1371 | if (aggr) |
| 1372 | last = ath_tx_form_aggr(sc, txq, tid, &bf_q, bf, |
| 1373 | tid_q, &aggr_len); |
| 1374 | else |
| 1375 | ath_tx_form_burst(sc, txq, tid, &bf_q, bf, tid_q); |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 1376 | |
Felix Fietkau | 020f20f | 2013-08-06 14:18:12 +0200 | [diff] [blame] | 1377 | if (list_empty(&bf_q)) |
| 1378 | return false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1379 | |
Felix Fietkau | f89d1bc | 2013-08-06 14:18:13 +0200 | [diff] [blame] | 1380 | if (tid->ac->clear_ps_filter || tid->an->no_ps_filter) { |
Felix Fietkau | 020f20f | 2013-08-06 14:18:12 +0200 | [diff] [blame] | 1381 | tid->ac->clear_ps_filter = false; |
| 1382 | tx_info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
| 1383 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1384 | |
Felix Fietkau | 020f20f | 2013-08-06 14:18:12 +0200 | [diff] [blame] | 1385 | ath_tx_fill_desc(sc, bf, txq, aggr_len); |
| 1386 | ath_tx_txqaddbuf(sc, txq, &bf_q, false); |
| 1387 | return true; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1388 | } |
| 1389 | |
Felix Fietkau | 231c3a1 | 2010-09-20 19:35:28 +0200 | [diff] [blame] | 1390 | int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta, |
| 1391 | u16 tid, u16 *ssn) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1392 | { |
| 1393 | struct ath_atx_tid *txtid; |
Felix Fietkau | 919123d | 2013-09-18 15:23:41 +0200 | [diff] [blame] | 1394 | struct ath_txq *txq; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1395 | struct ath_node *an; |
Sven Eckelmann | 313eb87 | 2012-06-25 07:15:22 +0200 | [diff] [blame] | 1396 | u8 density; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1397 | |
| 1398 | an = (struct ath_node *)sta->drv_priv; |
Sujith | f83da96 | 2009-07-23 15:32:37 +0530 | [diff] [blame] | 1399 | txtid = ATH_AN_2_TID(an, tid); |
Felix Fietkau | 919123d | 2013-09-18 15:23:41 +0200 | [diff] [blame] | 1400 | txq = txtid->ac->txq; |
| 1401 | |
| 1402 | ath_txq_lock(sc, txq); |
Felix Fietkau | 231c3a1 | 2010-09-20 19:35:28 +0200 | [diff] [blame] | 1403 | |
Sven Eckelmann | 313eb87 | 2012-06-25 07:15:22 +0200 | [diff] [blame] | 1404 | /* update ampdu factor/density, they may have changed. This may happen |
| 1405 | * in HT IBSS when a beacon with HT-info is received after the station |
| 1406 | * has already been added. |
| 1407 | */ |
Sujith Manoharan | dd5ee59 | 2013-02-04 15:38:23 +0530 | [diff] [blame] | 1408 | if (sta->ht_cap.ht_supported) { |
Sven Eckelmann | 313eb87 | 2012-06-25 07:15:22 +0200 | [diff] [blame] | 1409 | an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR + |
| 1410 | sta->ht_cap.ampdu_factor); |
| 1411 | density = ath9k_parse_mpdudensity(sta->ht_cap.ampdu_density); |
| 1412 | an->mpdudensity = density; |
| 1413 | } |
| 1414 | |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 1415 | /* force sequence number allocation for pending frames */ |
| 1416 | ath_tx_tid_change_state(sc, txtid); |
| 1417 | |
Felix Fietkau | 08c96ab | 2013-05-18 21:28:15 +0200 | [diff] [blame] | 1418 | txtid->active = true; |
Lorenzo Bianconi | 7540184 | 2010-08-01 15:47:32 +0200 | [diff] [blame] | 1419 | txtid->paused = true; |
Felix Fietkau | 49447f2 | 2011-01-10 17:05:48 -0700 | [diff] [blame] | 1420 | *ssn = txtid->seq_start = txtid->seq_next; |
Felix Fietkau | f943754 | 2011-12-14 22:08:08 +0100 | [diff] [blame] | 1421 | txtid->bar_index = -1; |
Felix Fietkau | 231c3a1 | 2010-09-20 19:35:28 +0200 | [diff] [blame] | 1422 | |
Felix Fietkau | 2ed7222 | 2011-01-10 17:05:49 -0700 | [diff] [blame] | 1423 | memset(txtid->tx_buf, 0, sizeof(txtid->tx_buf)); |
| 1424 | txtid->baw_head = txtid->baw_tail = 0; |
| 1425 | |
Felix Fietkau | 919123d | 2013-09-18 15:23:41 +0200 | [diff] [blame] | 1426 | ath_txq_unlock_complete(sc, txq); |
| 1427 | |
Felix Fietkau | 231c3a1 | 2010-09-20 19:35:28 +0200 | [diff] [blame] | 1428 | return 0; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1429 | } |
| 1430 | |
Felix Fietkau | 08c96ab | 2013-05-18 21:28:15 +0200 | [diff] [blame] | 1431 | void ath_tx_aggr_stop(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1432 | { |
| 1433 | struct ath_node *an = (struct ath_node *)sta->drv_priv; |
| 1434 | struct ath_atx_tid *txtid = ATH_AN_2_TID(an, tid); |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 1435 | struct ath_txq *txq = txtid->ac->txq; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1436 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 1437 | ath_txq_lock(sc, txq); |
Felix Fietkau | 08c96ab | 2013-05-18 21:28:15 +0200 | [diff] [blame] | 1438 | txtid->active = false; |
Felix Fietkau | 73364b0 | 2013-08-06 14:18:08 +0200 | [diff] [blame] | 1439 | txtid->paused = false; |
Felix Fietkau | 08c96ab | 2013-05-18 21:28:15 +0200 | [diff] [blame] | 1440 | ath_tx_flush_tid(sc, txtid); |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 1441 | ath_tx_tid_change_state(sc, txtid); |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 1442 | ath_txq_unlock_complete(sc, txq); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1443 | } |
| 1444 | |
Johannes Berg | 042ec45 | 2011-09-29 16:04:26 +0200 | [diff] [blame] | 1445 | void ath_tx_aggr_sleep(struct ieee80211_sta *sta, struct ath_softc *sc, |
| 1446 | struct ath_node *an) |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1447 | { |
| 1448 | struct ath_atx_tid *tid; |
| 1449 | struct ath_atx_ac *ac; |
| 1450 | struct ath_txq *txq; |
Johannes Berg | 042ec45 | 2011-09-29 16:04:26 +0200 | [diff] [blame] | 1451 | bool buffered; |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1452 | int tidno; |
| 1453 | |
| 1454 | for (tidno = 0, tid = &an->tid[tidno]; |
Sujith Manoharan | de7b760 | 2012-11-28 15:08:53 +0530 | [diff] [blame] | 1455 | tidno < IEEE80211_NUM_TIDS; tidno++, tid++) { |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1456 | |
| 1457 | if (!tid->sched) |
| 1458 | continue; |
| 1459 | |
| 1460 | ac = tid->ac; |
| 1461 | txq = ac->txq; |
| 1462 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 1463 | ath_txq_lock(sc, txq); |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1464 | |
Felix Fietkau | a7586ee | 2013-08-06 14:18:02 +0200 | [diff] [blame] | 1465 | buffered = ath_tid_has_buffered(tid); |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1466 | |
| 1467 | tid->sched = false; |
| 1468 | list_del(&tid->list); |
| 1469 | |
| 1470 | if (ac->sched) { |
| 1471 | ac->sched = false; |
| 1472 | list_del(&ac->list); |
| 1473 | } |
| 1474 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 1475 | ath_txq_unlock(sc, txq); |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1476 | |
Johannes Berg | 042ec45 | 2011-09-29 16:04:26 +0200 | [diff] [blame] | 1477 | ieee80211_sta_set_buffered(sta, tidno, buffered); |
| 1478 | } |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1479 | } |
| 1480 | |
| 1481 | void ath_tx_aggr_wakeup(struct ath_softc *sc, struct ath_node *an) |
| 1482 | { |
| 1483 | struct ath_atx_tid *tid; |
| 1484 | struct ath_atx_ac *ac; |
| 1485 | struct ath_txq *txq; |
| 1486 | int tidno; |
| 1487 | |
| 1488 | for (tidno = 0, tid = &an->tid[tidno]; |
Sujith Manoharan | de7b760 | 2012-11-28 15:08:53 +0530 | [diff] [blame] | 1489 | tidno < IEEE80211_NUM_TIDS; tidno++, tid++) { |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1490 | |
| 1491 | ac = tid->ac; |
| 1492 | txq = ac->txq; |
| 1493 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 1494 | ath_txq_lock(sc, txq); |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1495 | ac->clear_ps_filter = true; |
| 1496 | |
Felix Fietkau | a7586ee | 2013-08-06 14:18:02 +0200 | [diff] [blame] | 1497 | if (!tid->paused && ath_tid_has_buffered(tid)) { |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1498 | ath_tx_queue_tid(txq, tid); |
| 1499 | ath_txq_schedule(sc, txq); |
| 1500 | } |
| 1501 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 1502 | ath_txq_unlock_complete(sc, txq); |
Felix Fietkau | 5519541 | 2011-04-17 23:28:09 +0200 | [diff] [blame] | 1503 | } |
| 1504 | } |
| 1505 | |
Felix Fietkau | 08c96ab | 2013-05-18 21:28:15 +0200 | [diff] [blame] | 1506 | void ath_tx_aggr_resume(struct ath_softc *sc, struct ieee80211_sta *sta, |
| 1507 | u16 tidno) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1508 | { |
Felix Fietkau | 08c96ab | 2013-05-18 21:28:15 +0200 | [diff] [blame] | 1509 | struct ath_atx_tid *tid; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1510 | struct ath_node *an; |
Felix Fietkau | 08c96ab | 2013-05-18 21:28:15 +0200 | [diff] [blame] | 1511 | struct ath_txq *txq; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1512 | |
| 1513 | an = (struct ath_node *)sta->drv_priv; |
Felix Fietkau | 08c96ab | 2013-05-18 21:28:15 +0200 | [diff] [blame] | 1514 | tid = ATH_AN_2_TID(an, tidno); |
| 1515 | txq = tid->ac->txq; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1516 | |
Felix Fietkau | 08c96ab | 2013-05-18 21:28:15 +0200 | [diff] [blame] | 1517 | ath_txq_lock(sc, txq); |
| 1518 | |
| 1519 | tid->baw_size = IEEE80211_MIN_AMPDU_BUF << sta->ht_cap.ampdu_factor; |
| 1520 | tid->paused = false; |
| 1521 | |
Felix Fietkau | a7586ee | 2013-08-06 14:18:02 +0200 | [diff] [blame] | 1522 | if (ath_tid_has_buffered(tid)) { |
Felix Fietkau | 08c96ab | 2013-05-18 21:28:15 +0200 | [diff] [blame] | 1523 | ath_tx_queue_tid(txq, tid); |
| 1524 | ath_txq_schedule(sc, txq); |
| 1525 | } |
| 1526 | |
| 1527 | ath_txq_unlock_complete(sc, txq); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1528 | } |
| 1529 | |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 1530 | void ath9k_release_buffered_frames(struct ieee80211_hw *hw, |
| 1531 | struct ieee80211_sta *sta, |
| 1532 | u16 tids, int nframes, |
| 1533 | enum ieee80211_frame_release_type reason, |
| 1534 | bool more_data) |
| 1535 | { |
| 1536 | struct ath_softc *sc = hw->priv; |
| 1537 | struct ath_node *an = (struct ath_node *)sta->drv_priv; |
| 1538 | struct ath_txq *txq = sc->tx.uapsdq; |
| 1539 | struct ieee80211_tx_info *info; |
| 1540 | struct list_head bf_q; |
| 1541 | struct ath_buf *bf_tail = NULL, *bf; |
Felix Fietkau | a7586ee | 2013-08-06 14:18:02 +0200 | [diff] [blame] | 1542 | struct sk_buff_head *tid_q; |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 1543 | int sent = 0; |
| 1544 | int i; |
| 1545 | |
| 1546 | INIT_LIST_HEAD(&bf_q); |
| 1547 | for (i = 0; tids && nframes; i++, tids >>= 1) { |
| 1548 | struct ath_atx_tid *tid; |
| 1549 | |
| 1550 | if (!(tids & 1)) |
| 1551 | continue; |
| 1552 | |
| 1553 | tid = ATH_AN_2_TID(an, i); |
| 1554 | if (tid->paused) |
| 1555 | continue; |
| 1556 | |
| 1557 | ath_txq_lock(sc, tid->ac->txq); |
Felix Fietkau | a7586ee | 2013-08-06 14:18:02 +0200 | [diff] [blame] | 1558 | while (nframes > 0) { |
| 1559 | bf = ath_tx_get_tid_subframe(sc, sc->tx.uapsdq, tid, &tid_q); |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 1560 | if (!bf) |
| 1561 | break; |
| 1562 | |
Felix Fietkau | a7586ee | 2013-08-06 14:18:02 +0200 | [diff] [blame] | 1563 | __skb_unlink(bf->bf_mpdu, tid_q); |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 1564 | list_add_tail(&bf->list, &bf_q); |
| 1565 | ath_set_rates(tid->an->vif, tid->an->sta, bf); |
Felix Fietkau | 20e6e55 | 2013-09-17 12:05:15 +0200 | [diff] [blame] | 1566 | if (bf_isampdu(bf)) { |
| 1567 | ath_tx_addto_baw(sc, tid, bf); |
| 1568 | bf->bf_state.bf_type &= ~BUF_AGGR; |
| 1569 | } |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 1570 | if (bf_tail) |
| 1571 | bf_tail->bf_next = bf; |
| 1572 | |
| 1573 | bf_tail = bf; |
| 1574 | nframes--; |
| 1575 | sent++; |
| 1576 | TX_STAT_INC(txq->axq_qnum, a_queued_hw); |
| 1577 | |
Felix Fietkau | f89d1bc | 2013-08-06 14:18:13 +0200 | [diff] [blame] | 1578 | if (an->sta && !ath_tid_has_buffered(tid)) |
Felix Fietkau | 86a22ac | 2013-06-07 18:12:01 +0200 | [diff] [blame] | 1579 | ieee80211_sta_set_buffered(an->sta, i, false); |
| 1580 | } |
| 1581 | ath_txq_unlock_complete(sc, tid->ac->txq); |
| 1582 | } |
| 1583 | |
| 1584 | if (list_empty(&bf_q)) |
| 1585 | return; |
| 1586 | |
| 1587 | info = IEEE80211_SKB_CB(bf_tail->bf_mpdu); |
| 1588 | info->flags |= IEEE80211_TX_STATUS_EOSP; |
| 1589 | |
| 1590 | bf = list_first_entry(&bf_q, struct ath_buf, list); |
| 1591 | ath_txq_lock(sc, txq); |
| 1592 | ath_tx_fill_desc(sc, bf, txq, 0); |
| 1593 | ath_tx_txqaddbuf(sc, txq, &bf_q, false); |
| 1594 | ath_txq_unlock(sc, txq); |
| 1595 | } |
| 1596 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1597 | /********************/ |
| 1598 | /* Queue Management */ |
| 1599 | /********************/ |
| 1600 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1601 | struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype) |
| 1602 | { |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 1603 | struct ath_hw *ah = sc->sc_ah; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1604 | struct ath9k_tx_queue_info qi; |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 1605 | static const int subtype_txq_to_hwq[] = { |
Sujith Manoharan | bea843c | 2012-11-21 18:13:10 +0530 | [diff] [blame] | 1606 | [IEEE80211_AC_BE] = ATH_TXQ_AC_BE, |
| 1607 | [IEEE80211_AC_BK] = ATH_TXQ_AC_BK, |
| 1608 | [IEEE80211_AC_VI] = ATH_TXQ_AC_VI, |
| 1609 | [IEEE80211_AC_VO] = ATH_TXQ_AC_VO, |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 1610 | }; |
Ben Greear | 60f2d1d | 2011-01-09 23:11:52 -0800 | [diff] [blame] | 1611 | int axq_qnum, i; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1612 | |
| 1613 | memset(&qi, 0, sizeof(qi)); |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 1614 | qi.tqi_subtype = subtype_txq_to_hwq[subtype]; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1615 | qi.tqi_aifs = ATH9K_TXQ_USEDEFAULT; |
| 1616 | qi.tqi_cwmin = ATH9K_TXQ_USEDEFAULT; |
| 1617 | qi.tqi_cwmax = ATH9K_TXQ_USEDEFAULT; |
| 1618 | qi.tqi_physCompBuf = 0; |
| 1619 | |
| 1620 | /* |
| 1621 | * Enable interrupts only for EOL and DESC conditions. |
| 1622 | * We mark tx descriptors to receive a DESC interrupt |
| 1623 | * when a tx queue gets deep; otherwise waiting for the |
| 1624 | * EOL to reap descriptors. Note that this is done to |
| 1625 | * reduce interrupt load and this only defers reaping |
| 1626 | * descriptors, never transmitting frames. Aside from |
| 1627 | * reducing interrupts this also permits more concurrency. |
| 1628 | * The only potential downside is if the tx queue backs |
| 1629 | * up in which case the top half of the kernel may backup |
| 1630 | * due to a lack of tx descriptors. |
| 1631 | * |
| 1632 | * The UAPSD queue is an exception, since we take a desc- |
| 1633 | * based intr on the EOSP frames. |
| 1634 | */ |
Vasanthakumar Thiagarajan | afe754d | 2010-04-15 17:39:40 -0400 | [diff] [blame] | 1635 | if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
Felix Fietkau | ce8fdf6 | 2012-03-14 16:40:22 +0100 | [diff] [blame] | 1636 | qi.tqi_qflags = TXQ_FLAG_TXINT_ENABLE; |
Vasanthakumar Thiagarajan | afe754d | 2010-04-15 17:39:40 -0400 | [diff] [blame] | 1637 | } else { |
| 1638 | if (qtype == ATH9K_TX_QUEUE_UAPSD) |
| 1639 | qi.tqi_qflags = TXQ_FLAG_TXDESCINT_ENABLE; |
| 1640 | else |
| 1641 | qi.tqi_qflags = TXQ_FLAG_TXEOLINT_ENABLE | |
| 1642 | TXQ_FLAG_TXDESCINT_ENABLE; |
| 1643 | } |
Ben Greear | 60f2d1d | 2011-01-09 23:11:52 -0800 | [diff] [blame] | 1644 | axq_qnum = ath9k_hw_setuptxqueue(ah, qtype, &qi); |
| 1645 | if (axq_qnum == -1) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1646 | /* |
| 1647 | * NB: don't print a message, this happens |
| 1648 | * normally on parts with too few tx queues |
| 1649 | */ |
| 1650 | return NULL; |
| 1651 | } |
Ben Greear | 60f2d1d | 2011-01-09 23:11:52 -0800 | [diff] [blame] | 1652 | if (!ATH_TXQ_SETUP(sc, axq_qnum)) { |
| 1653 | struct ath_txq *txq = &sc->tx.txq[axq_qnum]; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1654 | |
Ben Greear | 60f2d1d | 2011-01-09 23:11:52 -0800 | [diff] [blame] | 1655 | txq->axq_qnum = axq_qnum; |
| 1656 | txq->mac80211_qnum = -1; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1657 | txq->axq_link = NULL; |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 1658 | __skb_queue_head_init(&txq->complete_q); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1659 | INIT_LIST_HEAD(&txq->axq_q); |
| 1660 | INIT_LIST_HEAD(&txq->axq_acq); |
| 1661 | spin_lock_init(&txq->axq_lock); |
| 1662 | txq->axq_depth = 0; |
Felix Fietkau | 4b3ba66 | 2010-12-17 00:57:00 +0100 | [diff] [blame] | 1663 | txq->axq_ampdu_depth = 0; |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 1664 | txq->axq_tx_inprogress = false; |
Ben Greear | 60f2d1d | 2011-01-09 23:11:52 -0800 | [diff] [blame] | 1665 | sc->tx.txqsetup |= 1<<axq_qnum; |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 1666 | |
| 1667 | txq->txq_headidx = txq->txq_tailidx = 0; |
| 1668 | for (i = 0; i < ATH_TXFIFO_DEPTH; i++) |
| 1669 | INIT_LIST_HEAD(&txq->txq_fifo[i]); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1670 | } |
Ben Greear | 60f2d1d | 2011-01-09 23:11:52 -0800 | [diff] [blame] | 1671 | return &sc->tx.txq[axq_qnum]; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1672 | } |
| 1673 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1674 | int ath_txq_update(struct ath_softc *sc, int qnum, |
| 1675 | struct ath9k_tx_queue_info *qinfo) |
| 1676 | { |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 1677 | struct ath_hw *ah = sc->sc_ah; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1678 | int error = 0; |
| 1679 | struct ath9k_tx_queue_info qi; |
| 1680 | |
Luis R. Rodriguez | 9680e8a | 2009-09-13 23:28:00 -0700 | [diff] [blame] | 1681 | BUG_ON(sc->tx.txq[qnum].axq_qnum != qnum); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1682 | |
| 1683 | ath9k_hw_get_txq_props(ah, qnum, &qi); |
| 1684 | qi.tqi_aifs = qinfo->tqi_aifs; |
| 1685 | qi.tqi_cwmin = qinfo->tqi_cwmin; |
| 1686 | qi.tqi_cwmax = qinfo->tqi_cwmax; |
| 1687 | qi.tqi_burstTime = qinfo->tqi_burstTime; |
| 1688 | qi.tqi_readyTime = qinfo->tqi_readyTime; |
| 1689 | |
| 1690 | if (!ath9k_hw_set_txq_props(ah, qnum, &qi)) { |
Joe Perches | 3800276 | 2010-12-02 19:12:36 -0800 | [diff] [blame] | 1691 | ath_err(ath9k_hw_common(sc->sc_ah), |
| 1692 | "Unable to update hardware queue %u!\n", qnum); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1693 | error = -EIO; |
| 1694 | } else { |
| 1695 | ath9k_hw_resettxqueue(ah, qnum); |
| 1696 | } |
| 1697 | |
| 1698 | return error; |
| 1699 | } |
| 1700 | |
| 1701 | int ath_cabq_update(struct ath_softc *sc) |
| 1702 | { |
| 1703 | struct ath9k_tx_queue_info qi; |
Steve Brown | 9814f6b | 2011-02-07 17:10:39 -0700 | [diff] [blame] | 1704 | struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1705 | int qnum = sc->beacon.cabq->axq_qnum; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1706 | |
| 1707 | ath9k_hw_get_txq_props(sc->sc_ah, qnum, &qi); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1708 | |
Steve Brown | 9814f6b | 2011-02-07 17:10:39 -0700 | [diff] [blame] | 1709 | qi.tqi_readyTime = (cur_conf->beacon_interval * |
Felix Fietkau | 7f329bb | 2013-10-11 23:30:59 +0200 | [diff] [blame] | 1710 | ATH_CABQ_READY_TIME) / 100; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1711 | ath_txq_update(sc, qnum, &qi); |
| 1712 | |
| 1713 | return 0; |
| 1714 | } |
| 1715 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1716 | 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] | 1717 | struct list_head *list) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1718 | { |
| 1719 | struct ath_buf *bf, *lastbf; |
| 1720 | struct list_head bf_head; |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 1721 | struct ath_tx_status ts; |
| 1722 | |
| 1723 | memset(&ts, 0, sizeof(ts)); |
Felix Fietkau | daa5c40 | 2011-10-07 02:28:15 +0200 | [diff] [blame] | 1724 | ts.ts_status = ATH9K_TX_FLUSH; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1725 | INIT_LIST_HEAD(&bf_head); |
| 1726 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1727 | while (!list_empty(list)) { |
| 1728 | bf = list_first_entry(list, struct ath_buf, list); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1729 | |
Felix Fietkau | 50676b8 | 2013-08-10 15:59:16 +0200 | [diff] [blame] | 1730 | if (bf->bf_state.stale) { |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1731 | list_del(&bf->list); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1732 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1733 | ath_tx_return_buffer(sc, bf); |
| 1734 | continue; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1735 | } |
| 1736 | |
| 1737 | lastbf = bf->bf_lastbf; |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1738 | list_cut_position(&bf_head, list, &lastbf->list); |
Felix Fietkau | 81b5195 | 2013-01-20 18:51:54 +0100 | [diff] [blame] | 1739 | ath_tx_process_buffer(sc, txq, &ts, bf, &bf_head); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 1740 | } |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1741 | } |
| 1742 | |
| 1743 | /* |
| 1744 | * Drain a given TX queue (could be Beacon or Data) |
| 1745 | * |
| 1746 | * This assumes output has been stopped and |
| 1747 | * we do not need to block ath_tx_tasklet. |
| 1748 | */ |
Felix Fietkau | 1381559 | 2013-01-20 18:51:53 +0100 | [diff] [blame] | 1749 | void ath_draintxq(struct ath_softc *sc, struct ath_txq *txq) |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1750 | { |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 1751 | ath_txq_lock(sc, txq); |
| 1752 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1753 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
| 1754 | int idx = txq->txq_tailidx; |
| 1755 | |
| 1756 | while (!list_empty(&txq->txq_fifo[idx])) { |
Felix Fietkau | 1381559 | 2013-01-20 18:51:53 +0100 | [diff] [blame] | 1757 | ath_drain_txq_list(sc, txq, &txq->txq_fifo[idx]); |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1758 | |
| 1759 | INCR(idx, ATH_TXFIFO_DEPTH); |
| 1760 | } |
| 1761 | txq->txq_tailidx = idx; |
| 1762 | } |
| 1763 | |
| 1764 | txq->axq_link = NULL; |
| 1765 | txq->axq_tx_inprogress = false; |
Felix Fietkau | 1381559 | 2013-01-20 18:51:53 +0100 | [diff] [blame] | 1766 | ath_drain_txq_list(sc, txq, &txq->axq_q); |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1767 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 1768 | ath_txq_unlock_complete(sc, txq); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1769 | } |
| 1770 | |
Felix Fietkau | 1381559 | 2013-01-20 18:51:53 +0100 | [diff] [blame] | 1771 | bool ath_drain_all_txq(struct ath_softc *sc) |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1772 | { |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 1773 | struct ath_hw *ah = sc->sc_ah; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1774 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1775 | struct ath_txq *txq; |
Felix Fietkau | 34d2581 | 2011-10-07 02:28:12 +0200 | [diff] [blame] | 1776 | int i; |
| 1777 | u32 npend = 0; |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1778 | |
Sujith Manoharan | 781b14a | 2012-06-04 20:23:55 +0530 | [diff] [blame] | 1779 | if (test_bit(SC_OP_INVALID, &sc->sc_flags)) |
Felix Fietkau | 080e1a2 | 2010-12-05 20:17:53 +0100 | [diff] [blame] | 1780 | return true; |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1781 | |
Felix Fietkau | 0d51ccc | 2011-03-11 21:38:18 +0100 | [diff] [blame] | 1782 | ath9k_hw_abort_tx_dma(ah); |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1783 | |
Felix Fietkau | 0d51ccc | 2011-03-11 21:38:18 +0100 | [diff] [blame] | 1784 | /* Check if any queue remains active */ |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1785 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { |
Felix Fietkau | 0d51ccc | 2011-03-11 21:38:18 +0100 | [diff] [blame] | 1786 | if (!ATH_TXQ_SETUP(sc, i)) |
| 1787 | continue; |
| 1788 | |
Felix Fietkau | 34d2581 | 2011-10-07 02:28:12 +0200 | [diff] [blame] | 1789 | if (ath9k_hw_numtxpending(ah, sc->tx.txq[i].axq_qnum)) |
| 1790 | npend |= BIT(i); |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1791 | } |
| 1792 | |
Felix Fietkau | 080e1a2 | 2010-12-05 20:17:53 +0100 | [diff] [blame] | 1793 | if (npend) |
Felix Fietkau | 34d2581 | 2011-10-07 02:28:12 +0200 | [diff] [blame] | 1794 | ath_err(common, "Failed to stop TX DMA, queues=0x%03x!\n", npend); |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1795 | |
| 1796 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { |
Felix Fietkau | 9246041 | 2011-01-24 19:23:14 +0100 | [diff] [blame] | 1797 | if (!ATH_TXQ_SETUP(sc, i)) |
| 1798 | continue; |
| 1799 | |
| 1800 | /* |
| 1801 | * The caller will resume queues with ieee80211_wake_queues. |
| 1802 | * Mark the queue as not stopped to prevent ath_tx_complete |
| 1803 | * from waking the queue too early. |
| 1804 | */ |
| 1805 | txq = &sc->tx.txq[i]; |
| 1806 | txq->stopped = false; |
Felix Fietkau | 1381559 | 2013-01-20 18:51:53 +0100 | [diff] [blame] | 1807 | ath_draintxq(sc, txq); |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1808 | } |
Felix Fietkau | 080e1a2 | 2010-12-05 20:17:53 +0100 | [diff] [blame] | 1809 | |
| 1810 | return !npend; |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1811 | } |
| 1812 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1813 | void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq) |
| 1814 | { |
| 1815 | ath9k_hw_releasetxqueue(sc->sc_ah, txq->axq_qnum); |
| 1816 | sc->tx.txqsetup &= ~(1<<txq->axq_qnum); |
| 1817 | } |
| 1818 | |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1819 | /* For each axq_acq entry, for each tid, try to schedule packets |
| 1820 | * for transmit until ampdu_depth has reached min Q depth. |
| 1821 | */ |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1822 | void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq) |
| 1823 | { |
Felix Fietkau | 020f20f | 2013-08-06 14:18:12 +0200 | [diff] [blame] | 1824 | struct ath_atx_ac *ac, *last_ac; |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1825 | struct ath_atx_tid *tid, *last_tid; |
Felix Fietkau | 020f20f | 2013-08-06 14:18:12 +0200 | [diff] [blame] | 1826 | bool sent = false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1827 | |
Rajkumar Manoharan | 124b979 | 2012-07-17 17:16:42 +0530 | [diff] [blame] | 1828 | if (test_bit(SC_OP_HW_RESET, &sc->sc_flags) || |
Felix Fietkau | 020f20f | 2013-08-06 14:18:12 +0200 | [diff] [blame] | 1829 | list_empty(&txq->axq_acq)) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1830 | return; |
| 1831 | |
Felix Fietkau | 23bc202 | 2013-06-22 12:39:26 +0200 | [diff] [blame] | 1832 | rcu_read_lock(); |
| 1833 | |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1834 | last_ac = list_entry(txq->axq_acq.prev, struct ath_atx_ac, list); |
Felix Fietkau | 020f20f | 2013-08-06 14:18:12 +0200 | [diff] [blame] | 1835 | while (!list_empty(&txq->axq_acq)) { |
| 1836 | bool stop = false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1837 | |
Felix Fietkau | 020f20f | 2013-08-06 14:18:12 +0200 | [diff] [blame] | 1838 | ac = list_first_entry(&txq->axq_acq, struct ath_atx_ac, list); |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1839 | last_tid = list_entry(ac->tid_q.prev, struct ath_atx_tid, list); |
| 1840 | list_del(&ac->list); |
| 1841 | ac->sched = false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1842 | |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1843 | while (!list_empty(&ac->tid_q)) { |
Felix Fietkau | 020f20f | 2013-08-06 14:18:12 +0200 | [diff] [blame] | 1844 | |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1845 | tid = list_first_entry(&ac->tid_q, struct ath_atx_tid, |
| 1846 | list); |
| 1847 | list_del(&tid->list); |
| 1848 | tid->sched = false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1849 | |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1850 | if (tid->paused) |
| 1851 | continue; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1852 | |
Felix Fietkau | 020f20f | 2013-08-06 14:18:12 +0200 | [diff] [blame] | 1853 | if (ath_tx_sched_aggr(sc, txq, tid, &stop)) |
| 1854 | sent = true; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1855 | |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1856 | /* |
| 1857 | * add tid to round-robin queue if more frames |
| 1858 | * are pending for the tid |
| 1859 | */ |
Felix Fietkau | a7586ee | 2013-08-06 14:18:02 +0200 | [diff] [blame] | 1860 | if (ath_tid_has_buffered(tid)) |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1861 | ath_tx_queue_tid(txq, tid); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1862 | |
Felix Fietkau | 020f20f | 2013-08-06 14:18:12 +0200 | [diff] [blame] | 1863 | if (stop || tid == last_tid) |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1864 | break; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1865 | } |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1866 | |
Felix Fietkau | b047701 | 2011-12-14 22:08:05 +0100 | [diff] [blame] | 1867 | if (!list_empty(&ac->tid_q) && !ac->sched) { |
| 1868 | ac->sched = true; |
| 1869 | list_add_tail(&ac->list, &txq->axq_acq); |
Ben Greear | 7755bad | 2011-01-18 17:30:00 -0800 | [diff] [blame] | 1870 | } |
| 1871 | |
Felix Fietkau | 020f20f | 2013-08-06 14:18:12 +0200 | [diff] [blame] | 1872 | if (stop) |
Felix Fietkau | 23bc202 | 2013-06-22 12:39:26 +0200 | [diff] [blame] | 1873 | break; |
Felix Fietkau | 020f20f | 2013-08-06 14:18:12 +0200 | [diff] [blame] | 1874 | |
| 1875 | if (ac == last_ac) { |
| 1876 | if (!sent) |
| 1877 | break; |
| 1878 | |
| 1879 | sent = false; |
| 1880 | last_ac = list_entry(txq->axq_acq.prev, |
| 1881 | struct ath_atx_ac, list); |
| 1882 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1883 | } |
Felix Fietkau | 23bc202 | 2013-06-22 12:39:26 +0200 | [diff] [blame] | 1884 | |
| 1885 | rcu_read_unlock(); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1886 | } |
| 1887 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1888 | /***********/ |
| 1889 | /* TX, DMA */ |
| 1890 | /***********/ |
| 1891 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1892 | /* |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1893 | * Insert a chain of ath_buf (descriptors) on a txq and |
| 1894 | * assume the descriptors are already chained together by caller. |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1895 | */ |
Sujith | 102e057 | 2008-10-29 10:15:16 +0530 | [diff] [blame] | 1896 | 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] | 1897 | struct list_head *head, bool internal) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1898 | { |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 1899 | struct ath_hw *ah = sc->sc_ah; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1900 | struct ath_common *common = ath9k_hw_common(ah); |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1901 | struct ath_buf *bf, *bf_last; |
| 1902 | bool puttxbuf = false; |
| 1903 | bool edma; |
Sujith | 102e057 | 2008-10-29 10:15:16 +0530 | [diff] [blame] | 1904 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1905 | /* |
| 1906 | * Insert the frame on the outbound list and |
| 1907 | * pass it on to the hardware. |
| 1908 | */ |
| 1909 | |
| 1910 | if (list_empty(head)) |
| 1911 | return; |
| 1912 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1913 | edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1914 | bf = list_first_entry(head, struct ath_buf, list); |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1915 | bf_last = list_entry(head->prev, struct ath_buf, list); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1916 | |
Joe Perches | d2182b6 | 2011-12-15 14:55:53 -0800 | [diff] [blame] | 1917 | ath_dbg(common, QUEUE, "qnum: %d, txq depth: %d\n", |
| 1918 | txq->axq_qnum, txq->axq_depth); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1919 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1920 | if (edma && list_empty(&txq->txq_fifo[txq->txq_headidx])) { |
| 1921 | list_splice_tail_init(head, &txq->txq_fifo[txq->txq_headidx]); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 1922 | INCR(txq->txq_headidx, ATH_TXFIFO_DEPTH); |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1923 | puttxbuf = true; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1924 | } else { |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 1925 | list_splice_tail_init(head, &txq->axq_q); |
| 1926 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1927 | if (txq->axq_link) { |
| 1928 | ath9k_hw_set_desc_link(ah, txq->axq_link, bf->bf_daddr); |
Joe Perches | d2182b6 | 2011-12-15 14:55:53 -0800 | [diff] [blame] | 1929 | ath_dbg(common, XMIT, "link[%u] (%p)=%llx (%p)\n", |
Joe Perches | 226afe6 | 2010-12-02 19:12:37 -0800 | [diff] [blame] | 1930 | txq->axq_qnum, txq->axq_link, |
| 1931 | ito64(bf->bf_daddr), bf->bf_desc); |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1932 | } else if (!edma) |
| 1933 | puttxbuf = true; |
| 1934 | |
| 1935 | txq->axq_link = bf_last->bf_desc; |
| 1936 | } |
| 1937 | |
| 1938 | if (puttxbuf) { |
| 1939 | TX_STAT_INC(txq->axq_qnum, puttxbuf); |
| 1940 | ath9k_hw_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); |
Joe Perches | d2182b6 | 2011-12-15 14:55:53 -0800 | [diff] [blame] | 1941 | ath_dbg(common, XMIT, "TXDP[%u] = %llx (%p)\n", |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1942 | txq->axq_qnum, ito64(bf->bf_daddr), bf->bf_desc); |
| 1943 | } |
| 1944 | |
Luis R. Rodriguez | 89f927a | 2013-10-14 17:42:11 -0700 | [diff] [blame] | 1945 | if (!edma || sc->tx99_state) { |
Felix Fietkau | 8d8d3fd | 2011-01-24 19:11:54 +0100 | [diff] [blame] | 1946 | TX_STAT_INC(txq->axq_qnum, txstart); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 1947 | ath9k_hw_txstart(ah, txq->axq_qnum); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1948 | } |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1949 | |
| 1950 | if (!internal) { |
Felix Fietkau | f56e121 | 2013-06-20 15:11:31 +0200 | [diff] [blame] | 1951 | while (bf) { |
| 1952 | txq->axq_depth++; |
| 1953 | if (bf_is_ampdu_not_probing(bf)) |
| 1954 | txq->axq_ampdu_depth++; |
| 1955 | |
Felix Fietkau | 440c1c8 | 2013-09-14 17:02:29 +0200 | [diff] [blame] | 1956 | bf_last = bf->bf_lastbf; |
| 1957 | bf = bf_last->bf_next; |
| 1958 | bf_last->bf_next = NULL; |
Felix Fietkau | f56e121 | 2013-06-20 15:11:31 +0200 | [diff] [blame] | 1959 | } |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 1960 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1961 | } |
| 1962 | |
Felix Fietkau | 82b873a | 2010-11-11 03:18:37 +0100 | [diff] [blame] | 1963 | 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] | 1964 | struct ath_atx_tid *tid, struct sk_buff *skb) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1965 | { |
Felix Fietkau | f69727f | 2013-09-29 13:06:31 +0200 | [diff] [blame] | 1966 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 1967 | struct ath_frame_info *fi = get_frame_info(skb); |
| 1968 | struct list_head bf_head; |
Felix Fietkau | f69727f | 2013-09-29 13:06:31 +0200 | [diff] [blame] | 1969 | struct ath_buf *bf = fi->bf; |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 1970 | |
| 1971 | INIT_LIST_HEAD(&bf_head); |
| 1972 | list_add_tail(&bf->list, &bf_head); |
Felix Fietkau | 399c648 | 2011-09-14 21:24:17 +0200 | [diff] [blame] | 1973 | bf->bf_state.bf_type = 0; |
Felix Fietkau | f69727f | 2013-09-29 13:06:31 +0200 | [diff] [blame] | 1974 | if (tid && (tx_info->flags & IEEE80211_TX_CTL_AMPDU)) { |
| 1975 | bf->bf_state.bf_type = BUF_AMPDU; |
| 1976 | ath_tx_addto_baw(sc, tid, bf); |
| 1977 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1978 | |
Felix Fietkau | 8c6e309 | 2012-10-26 00:31:11 +0200 | [diff] [blame] | 1979 | bf->bf_next = NULL; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 1980 | bf->bf_lastbf = bf; |
Felix Fietkau | 493cf04 | 2011-09-14 21:24:22 +0200 | [diff] [blame] | 1981 | ath_tx_fill_desc(sc, bf, txq, fi->framelen); |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 1982 | ath_tx_txqaddbuf(sc, txq, &bf_head, false); |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 1983 | TX_STAT_INC(txq->axq_qnum, queued); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1984 | } |
| 1985 | |
Thomas Huehn | 36323f8 | 2012-07-23 21:33:42 +0200 | [diff] [blame] | 1986 | static void setup_frame_info(struct ieee80211_hw *hw, |
| 1987 | struct ieee80211_sta *sta, |
| 1988 | struct sk_buff *skb, |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 1989 | int framelen) |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1990 | { |
| 1991 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 1992 | struct ieee80211_key_conf *hw_key = tx_info->control.hw_key; |
Felix Fietkau | 6a0ddae | 2011-08-28 00:32:23 +0200 | [diff] [blame] | 1993 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
Felix Fietkau | 80b08a8 | 2012-06-15 03:04:53 +0200 | [diff] [blame] | 1994 | const struct ieee80211_rate *rate; |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 1995 | struct ath_frame_info *fi = get_frame_info(skb); |
Felix Fietkau | 93ae2dd | 2011-04-17 23:28:10 +0200 | [diff] [blame] | 1996 | struct ath_node *an = NULL; |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 1997 | enum ath9k_key_type keytype; |
Felix Fietkau | 80b08a8 | 2012-06-15 03:04:53 +0200 | [diff] [blame] | 1998 | bool short_preamble = false; |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1999 | |
Felix Fietkau | 80b08a8 | 2012-06-15 03:04:53 +0200 | [diff] [blame] | 2000 | /* |
| 2001 | * We check if Short Preamble is needed for the CTS rate by |
| 2002 | * checking the BSS's global flag. |
| 2003 | * But for the rate series, IEEE80211_TX_RC_USE_SHORT_PREAMBLE is used. |
| 2004 | */ |
| 2005 | if (tx_info->control.vif && |
| 2006 | tx_info->control.vif->bss_conf.use_short_preamble) |
| 2007 | short_preamble = true; |
| 2008 | |
| 2009 | rate = ieee80211_get_rts_cts_rate(hw, tx_info); |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 2010 | keytype = ath9k_cmn_get_hw_crypto_keytype(skb); |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 2011 | |
Felix Fietkau | 93ae2dd | 2011-04-17 23:28:10 +0200 | [diff] [blame] | 2012 | if (sta) |
| 2013 | an = (struct ath_node *) sta->drv_priv; |
| 2014 | |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 2015 | memset(fi, 0, sizeof(*fi)); |
| 2016 | if (hw_key) |
| 2017 | fi->keyix = hw_key->hw_key_idx; |
Felix Fietkau | 93ae2dd | 2011-04-17 23:28:10 +0200 | [diff] [blame] | 2018 | else if (an && ieee80211_is_data(hdr->frame_control) && an->ps_key > 0) |
| 2019 | fi->keyix = an->ps_key; |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 2020 | else |
| 2021 | fi->keyix = ATH9K_TXKEYIX_INVALID; |
| 2022 | fi->keytype = keytype; |
| 2023 | fi->framelen = framelen; |
Luis R. Rodriguez | 09b029b | 2013-10-14 17:42:10 -0700 | [diff] [blame] | 2024 | |
| 2025 | if (!rate) |
| 2026 | return; |
Felix Fietkau | 80b08a8 | 2012-06-15 03:04:53 +0200 | [diff] [blame] | 2027 | fi->rtscts_rate = rate->hw_value; |
| 2028 | if (short_preamble) |
| 2029 | fi->rtscts_rate |= rate->hw_value_short; |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 2030 | } |
| 2031 | |
Mohammed Shafi Shajakhan | ea066d5 | 2010-11-23 20:42:27 +0530 | [diff] [blame] | 2032 | u8 ath_txchainmask_reduction(struct ath_softc *sc, u8 chainmask, u32 rate) |
| 2033 | { |
| 2034 | struct ath_hw *ah = sc->sc_ah; |
| 2035 | struct ath9k_channel *curchan = ah->curchan; |
Sujith Manoharan | 365d2eb | 2012-09-26 12:22:08 +0530 | [diff] [blame] | 2036 | |
Felix Fietkau | 8896934 | 2013-10-11 23:30:53 +0200 | [diff] [blame] | 2037 | if ((ah->caps.hw_caps & ATH9K_HW_CAP_APM) && IS_CHAN_5GHZ(curchan) && |
Rajkumar Manoharan | d77bf3e | 2011-08-13 10:28:14 +0530 | [diff] [blame] | 2038 | (chainmask == 0x7) && (rate < 0x90)) |
Mohammed Shafi Shajakhan | ea066d5 | 2010-11-23 20:42:27 +0530 | [diff] [blame] | 2039 | return 0x3; |
Sujith Manoharan | 365d2eb | 2012-09-26 12:22:08 +0530 | [diff] [blame] | 2040 | else if (AR_SREV_9462(ah) && ath9k_hw_btcoex_is_enabled(ah) && |
| 2041 | IS_CCK_RATE(rate)) |
| 2042 | return 0x2; |
Mohammed Shafi Shajakhan | ea066d5 | 2010-11-23 20:42:27 +0530 | [diff] [blame] | 2043 | else |
| 2044 | return chainmask; |
| 2045 | } |
| 2046 | |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 2047 | /* |
| 2048 | * Assign a descriptor (and sequence number if necessary, |
| 2049 | * and map buffer for DMA. Frees skb on error |
| 2050 | */ |
Felix Fietkau | fa05f87 | 2011-08-28 00:32:24 +0200 | [diff] [blame] | 2051 | static struct ath_buf *ath_tx_setup_buffer(struct ath_softc *sc, |
Felix Fietkau | 04caf86 | 2010-11-14 15:20:12 +0100 | [diff] [blame] | 2052 | struct ath_txq *txq, |
Felix Fietkau | fa05f87 | 2011-08-28 00:32:24 +0200 | [diff] [blame] | 2053 | struct ath_atx_tid *tid, |
Felix Fietkau | 249ee72 | 2012-10-03 21:07:52 +0200 | [diff] [blame] | 2054 | struct sk_buff *skb) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2055 | { |
Felix Fietkau | 82b873a | 2010-11-11 03:18:37 +0100 | [diff] [blame] | 2056 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 2057 | struct ath_frame_info *fi = get_frame_info(skb); |
Felix Fietkau | fa05f87 | 2011-08-28 00:32:24 +0200 | [diff] [blame] | 2058 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
Felix Fietkau | 82b873a | 2010-11-11 03:18:37 +0100 | [diff] [blame] | 2059 | struct ath_buf *bf; |
Sujith Manoharan | fd09c85 | 2012-04-17 08:34:50 +0530 | [diff] [blame] | 2060 | int fragno; |
Felix Fietkau | fa05f87 | 2011-08-28 00:32:24 +0200 | [diff] [blame] | 2061 | u16 seqno; |
Felix Fietkau | 82b873a | 2010-11-11 03:18:37 +0100 | [diff] [blame] | 2062 | |
| 2063 | bf = ath_tx_get_buffer(sc); |
| 2064 | if (!bf) { |
Joe Perches | d2182b6 | 2011-12-15 14:55:53 -0800 | [diff] [blame] | 2065 | ath_dbg(common, XMIT, "TX buffers are full\n"); |
Felix Fietkau | 249ee72 | 2012-10-03 21:07:52 +0200 | [diff] [blame] | 2066 | return NULL; |
Felix Fietkau | 82b873a | 2010-11-11 03:18:37 +0100 | [diff] [blame] | 2067 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2068 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2069 | ATH_TXBUF_RESET(bf); |
| 2070 | |
Felix Fietkau | fa05f87 | 2011-08-28 00:32:24 +0200 | [diff] [blame] | 2071 | if (tid) { |
Sujith Manoharan | fd09c85 | 2012-04-17 08:34:50 +0530 | [diff] [blame] | 2072 | fragno = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; |
Felix Fietkau | fa05f87 | 2011-08-28 00:32:24 +0200 | [diff] [blame] | 2073 | seqno = tid->seq_next; |
| 2074 | 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] | 2075 | |
| 2076 | if (fragno) |
| 2077 | hdr->seq_ctrl |= cpu_to_le16(fragno); |
| 2078 | |
| 2079 | if (!ieee80211_has_morefrags(hdr->frame_control)) |
| 2080 | INCR(tid->seq_next, IEEE80211_SEQ_MAX); |
| 2081 | |
Felix Fietkau | fa05f87 | 2011-08-28 00:32:24 +0200 | [diff] [blame] | 2082 | bf->bf_state.seqno = seqno; |
| 2083 | } |
| 2084 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2085 | bf->bf_mpdu = skb; |
| 2086 | |
Ben Greear | c1739eb3 | 2010-10-14 12:45:29 -0700 | [diff] [blame] | 2087 | bf->bf_buf_addr = dma_map_single(sc->dev, skb->data, |
| 2088 | skb->len, DMA_TO_DEVICE); |
| 2089 | if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2090 | bf->bf_mpdu = NULL; |
Ben Greear | 6cf9e99 | 2010-10-14 12:45:30 -0700 | [diff] [blame] | 2091 | bf->bf_buf_addr = 0; |
Joe Perches | 3800276 | 2010-12-02 19:12:36 -0800 | [diff] [blame] | 2092 | ath_err(ath9k_hw_common(sc->sc_ah), |
| 2093 | "dma_mapping_error() on TX\n"); |
Felix Fietkau | 82b873a | 2010-11-11 03:18:37 +0100 | [diff] [blame] | 2094 | ath_tx_return_buffer(sc, bf); |
Felix Fietkau | 249ee72 | 2012-10-03 21:07:52 +0200 | [diff] [blame] | 2095 | return NULL; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2096 | } |
| 2097 | |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 2098 | fi->bf = bf; |
Felix Fietkau | 04caf86 | 2010-11-14 15:20:12 +0100 | [diff] [blame] | 2099 | |
| 2100 | return bf; |
| 2101 | } |
| 2102 | |
Felix Fietkau | 59505c0 | 2013-06-07 18:12:02 +0200 | [diff] [blame] | 2103 | static int ath_tx_prepare(struct ieee80211_hw *hw, struct sk_buff *skb, |
| 2104 | struct ath_tx_control *txctl) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2105 | { |
Felix Fietkau | 28d1670 | 2010-11-14 15:20:10 +0100 | [diff] [blame] | 2106 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 2107 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
Thomas Huehn | 36323f8 | 2012-07-23 21:33:42 +0200 | [diff] [blame] | 2108 | struct ieee80211_sta *sta = txctl->sta; |
Felix Fietkau | f59a59f | 2011-05-10 20:52:22 +0200 | [diff] [blame] | 2109 | struct ieee80211_vif *vif = info->control.vif; |
Felix Fietkau | f89d1bc | 2013-08-06 14:18:13 +0200 | [diff] [blame] | 2110 | struct ath_vif *avp; |
Felix Fietkau | 9ac5861 | 2011-01-24 19:23:18 +0100 | [diff] [blame] | 2111 | struct ath_softc *sc = hw->priv; |
Felix Fietkau | 04caf86 | 2010-11-14 15:20:12 +0100 | [diff] [blame] | 2112 | int frmlen = skb->len + FCS_LEN; |
Felix Fietkau | 59505c0 | 2013-06-07 18:12:02 +0200 | [diff] [blame] | 2113 | int padpos, padsize; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2114 | |
Ben Greear | a9927ba | 2010-12-06 21:13:49 -0800 | [diff] [blame] | 2115 | /* NOTE: sta can be NULL according to net/mac80211.h */ |
| 2116 | if (sta) |
| 2117 | txctl->an = (struct ath_node *)sta->drv_priv; |
Felix Fietkau | f89d1bc | 2013-08-06 14:18:13 +0200 | [diff] [blame] | 2118 | else if (vif && ieee80211_is_data(hdr->frame_control)) { |
| 2119 | avp = (void *)vif->drv_priv; |
| 2120 | txctl->an = &avp->mcast_node; |
| 2121 | } |
Ben Greear | a9927ba | 2010-12-06 21:13:49 -0800 | [diff] [blame] | 2122 | |
Felix Fietkau | 04caf86 | 2010-11-14 15:20:12 +0100 | [diff] [blame] | 2123 | if (info->control.hw_key) |
| 2124 | frmlen += info->control.hw_key->icv_len; |
| 2125 | |
Felix Fietkau | 28d1670 | 2010-11-14 15:20:10 +0100 | [diff] [blame] | 2126 | /* |
| 2127 | * As a temporary workaround, assign seq# here; this will likely need |
| 2128 | * to be cleaned up to work better with Beacon transmission and virtual |
| 2129 | * BSSes. |
| 2130 | */ |
| 2131 | if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { |
| 2132 | if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) |
| 2133 | sc->tx.seq_no += 0x10; |
| 2134 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); |
| 2135 | hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no); |
| 2136 | } |
| 2137 | |
Felix Fietkau | 59505c0 | 2013-06-07 18:12:02 +0200 | [diff] [blame] | 2138 | if ((vif && vif->type != NL80211_IFTYPE_AP && |
| 2139 | vif->type != NL80211_IFTYPE_AP_VLAN) || |
| 2140 | !ieee80211_is_data(hdr->frame_control)) |
| 2141 | info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT; |
| 2142 | |
John W. Linville | 42cecc3 | 2011-09-19 15:42:31 -0400 | [diff] [blame] | 2143 | /* Add the padding after the header if this is not already done */ |
Felix Fietkau | c60c992 | 2013-04-08 00:04:09 +0200 | [diff] [blame] | 2144 | padpos = ieee80211_hdrlen(hdr->frame_control); |
John W. Linville | 42cecc3 | 2011-09-19 15:42:31 -0400 | [diff] [blame] | 2145 | padsize = padpos & 3; |
| 2146 | if (padsize && skb->len > padpos) { |
| 2147 | if (skb_headroom(skb) < padsize) |
| 2148 | return -ENOMEM; |
Felix Fietkau | 28d1670 | 2010-11-14 15:20:10 +0100 | [diff] [blame] | 2149 | |
John W. Linville | 42cecc3 | 2011-09-19 15:42:31 -0400 | [diff] [blame] | 2150 | skb_push(skb, padsize); |
| 2151 | memmove(skb->data, skb->data + padsize, padpos); |
Felix Fietkau | 28d1670 | 2010-11-14 15:20:10 +0100 | [diff] [blame] | 2152 | } |
| 2153 | |
Thomas Huehn | 36323f8 | 2012-07-23 21:33:42 +0200 | [diff] [blame] | 2154 | setup_frame_info(hw, sta, skb, frmlen); |
Felix Fietkau | 59505c0 | 2013-06-07 18:12:02 +0200 | [diff] [blame] | 2155 | return 0; |
| 2156 | } |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 2157 | |
Felix Fietkau | 59505c0 | 2013-06-07 18:12:02 +0200 | [diff] [blame] | 2158 | |
| 2159 | /* Upon failure caller should free skb */ |
| 2160 | int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb, |
| 2161 | struct ath_tx_control *txctl) |
| 2162 | { |
| 2163 | struct ieee80211_hdr *hdr; |
| 2164 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 2165 | struct ieee80211_sta *sta = txctl->sta; |
| 2166 | struct ieee80211_vif *vif = info->control.vif; |
| 2167 | struct ath_softc *sc = hw->priv; |
| 2168 | struct ath_txq *txq = txctl->txq; |
| 2169 | struct ath_atx_tid *tid = NULL; |
| 2170 | struct ath_buf *bf; |
Felix Fietkau | 59505c0 | 2013-06-07 18:12:02 +0200 | [diff] [blame] | 2171 | int q; |
| 2172 | int ret; |
| 2173 | |
| 2174 | ret = ath_tx_prepare(hw, skb, txctl); |
| 2175 | if (ret) |
| 2176 | return ret; |
| 2177 | |
| 2178 | hdr = (struct ieee80211_hdr *) skb->data; |
Felix Fietkau | 2d42efc | 2010-11-14 15:20:13 +0100 | [diff] [blame] | 2179 | /* |
| 2180 | * At this point, the vif, hw_key and sta pointers in the tx control |
| 2181 | * info are no longer valid (overwritten by the ath_frame_info data. |
| 2182 | */ |
| 2183 | |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 2184 | q = skb_get_queue_mapping(skb); |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 2185 | |
| 2186 | ath_txq_lock(sc, txq); |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 2187 | if (txq == sc->tx.txq_map[q] && |
Felix Fietkau | 7702e78 | 2012-07-15 19:53:35 +0200 | [diff] [blame] | 2188 | ++txq->pending_frames > sc->tx.txq_max_pending[q] && |
| 2189 | !txq->stopped) { |
Felix Fietkau | 7545daf | 2011-01-24 19:23:16 +0100 | [diff] [blame] | 2190 | ieee80211_stop_queue(sc->hw, q); |
Rusty Russell | 3db1cd5 | 2011-12-19 13:56:45 +0000 | [diff] [blame] | 2191 | txq->stopped = true; |
Felix Fietkau | 97923b1 | 2010-06-12 00:33:55 -0400 | [diff] [blame] | 2192 | } |
Felix Fietkau | 97923b1 | 2010-06-12 00:33:55 -0400 | [diff] [blame] | 2193 | |
Felix Fietkau | f2c7a79 | 2013-06-07 18:12:00 +0200 | [diff] [blame] | 2194 | if (info->flags & IEEE80211_TX_CTL_PS_RESPONSE) { |
| 2195 | ath_txq_unlock(sc, txq); |
| 2196 | txq = sc->tx.uapsdq; |
| 2197 | ath_txq_lock(sc, txq); |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 2198 | } else if (txctl->an && |
| 2199 | ieee80211_is_data_present(hdr->frame_control)) { |
Felix Fietkau | 1803d02 | 2013-08-06 14:18:04 +0200 | [diff] [blame] | 2200 | tid = ath_get_skb_tid(sc, txctl->an, skb); |
Felix Fietkau | 3ad2952 | 2011-12-14 22:08:07 +0100 | [diff] [blame] | 2201 | |
Felix Fietkau | bdc2145 | 2013-04-22 23:11:43 +0200 | [diff] [blame] | 2202 | WARN_ON(tid->ac->txq != txctl->txq); |
Felix Fietkau | bdc2145 | 2013-04-22 23:11:43 +0200 | [diff] [blame] | 2203 | |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 2204 | if (info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT) |
| 2205 | tid->ac->clear_ps_filter = true; |
| 2206 | |
Felix Fietkau | bdc2145 | 2013-04-22 23:11:43 +0200 | [diff] [blame] | 2207 | /* |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 2208 | * Add this frame to software queue for scheduling later |
| 2209 | * for aggregation. |
Felix Fietkau | bdc2145 | 2013-04-22 23:11:43 +0200 | [diff] [blame] | 2210 | */ |
Felix Fietkau | 2800e82 | 2013-08-06 14:18:11 +0200 | [diff] [blame] | 2211 | TX_STAT_INC(txq->axq_qnum, a_queued_sw); |
| 2212 | __skb_queue_tail(&tid->buf_q, skb); |
| 2213 | if (!txctl->an->sleeping) |
| 2214 | ath_tx_queue_tid(txq, tid); |
| 2215 | |
| 2216 | ath_txq_schedule(sc, txq); |
Felix Fietkau | bdc2145 | 2013-04-22 23:11:43 +0200 | [diff] [blame] | 2217 | goto out; |
| 2218 | } |
| 2219 | |
Felix Fietkau | f2c7a79 | 2013-06-07 18:12:00 +0200 | [diff] [blame] | 2220 | bf = ath_tx_setup_buffer(sc, txq, tid, skb); |
Felix Fietkau | bdc2145 | 2013-04-22 23:11:43 +0200 | [diff] [blame] | 2221 | if (!bf) { |
Felix Fietkau | a4943cc | 2013-06-30 12:02:13 +0200 | [diff] [blame] | 2222 | ath_txq_skb_done(sc, txq, skb); |
Felix Fietkau | bdc2145 | 2013-04-22 23:11:43 +0200 | [diff] [blame] | 2223 | if (txctl->paprd) |
| 2224 | dev_kfree_skb_any(skb); |
| 2225 | else |
| 2226 | ieee80211_free_txskb(sc->hw, skb); |
| 2227 | goto out; |
| 2228 | } |
| 2229 | |
| 2230 | bf->bf_state.bfs_paprd = txctl->paprd; |
| 2231 | |
| 2232 | if (txctl->paprd) |
| 2233 | bf->bf_state.bfs_paprd_timestamp = jiffies; |
| 2234 | |
Felix Fietkau | 79acac0 | 2013-04-22 23:11:44 +0200 | [diff] [blame] | 2235 | ath_set_rates(vif, sta, bf); |
Felix Fietkau | f2c7a79 | 2013-06-07 18:12:00 +0200 | [diff] [blame] | 2236 | ath_tx_send_normal(sc, txq, tid, skb); |
Felix Fietkau | bdc2145 | 2013-04-22 23:11:43 +0200 | [diff] [blame] | 2237 | |
| 2238 | out: |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 2239 | ath_txq_unlock(sc, txq); |
Felix Fietkau | 3ad2952 | 2011-12-14 22:08:07 +0100 | [diff] [blame] | 2240 | |
Felix Fietkau | 44f1d26 | 2011-08-28 00:32:25 +0200 | [diff] [blame] | 2241 | return 0; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2242 | } |
| 2243 | |
Felix Fietkau | 59505c0 | 2013-06-07 18:12:02 +0200 | [diff] [blame] | 2244 | void ath_tx_cabq(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
| 2245 | struct sk_buff *skb) |
| 2246 | { |
| 2247 | struct ath_softc *sc = hw->priv; |
| 2248 | struct ath_tx_control txctl = { |
| 2249 | .txq = sc->beacon.cabq |
| 2250 | }; |
| 2251 | struct ath_tx_info info = {}; |
| 2252 | struct ieee80211_hdr *hdr; |
| 2253 | struct ath_buf *bf_tail = NULL; |
| 2254 | struct ath_buf *bf; |
| 2255 | LIST_HEAD(bf_q); |
| 2256 | int duration = 0; |
| 2257 | int max_duration; |
| 2258 | |
| 2259 | max_duration = |
| 2260 | sc->cur_beacon_conf.beacon_interval * 1000 * |
| 2261 | sc->cur_beacon_conf.dtim_period / ATH_BCBUF; |
| 2262 | |
| 2263 | do { |
| 2264 | struct ath_frame_info *fi = get_frame_info(skb); |
| 2265 | |
| 2266 | if (ath_tx_prepare(hw, skb, &txctl)) |
| 2267 | break; |
| 2268 | |
| 2269 | bf = ath_tx_setup_buffer(sc, txctl.txq, NULL, skb); |
| 2270 | if (!bf) |
| 2271 | break; |
| 2272 | |
| 2273 | bf->bf_lastbf = bf; |
| 2274 | ath_set_rates(vif, NULL, bf); |
Sujith Manoharan | a3835e9 | 2013-07-04 12:59:47 +0530 | [diff] [blame] | 2275 | ath_buf_set_rate(sc, bf, &info, fi->framelen, false); |
Felix Fietkau | 59505c0 | 2013-06-07 18:12:02 +0200 | [diff] [blame] | 2276 | duration += info.rates[0].PktDuration; |
| 2277 | if (bf_tail) |
| 2278 | bf_tail->bf_next = bf; |
| 2279 | |
| 2280 | list_add_tail(&bf->list, &bf_q); |
| 2281 | bf_tail = bf; |
| 2282 | skb = NULL; |
| 2283 | |
| 2284 | if (duration > max_duration) |
| 2285 | break; |
| 2286 | |
| 2287 | skb = ieee80211_get_buffered_bc(hw, vif); |
| 2288 | } while(skb); |
| 2289 | |
| 2290 | if (skb) |
| 2291 | ieee80211_free_txskb(hw, skb); |
| 2292 | |
| 2293 | if (list_empty(&bf_q)) |
| 2294 | return; |
| 2295 | |
| 2296 | bf = list_first_entry(&bf_q, struct ath_buf, list); |
| 2297 | hdr = (struct ieee80211_hdr *) bf->bf_mpdu->data; |
| 2298 | |
| 2299 | if (hdr->frame_control & IEEE80211_FCTL_MOREDATA) { |
| 2300 | hdr->frame_control &= ~IEEE80211_FCTL_MOREDATA; |
| 2301 | dma_sync_single_for_device(sc->dev, bf->bf_buf_addr, |
| 2302 | sizeof(*hdr), DMA_TO_DEVICE); |
| 2303 | } |
| 2304 | |
| 2305 | ath_txq_lock(sc, txctl.txq); |
| 2306 | ath_tx_fill_desc(sc, bf, txctl.txq, 0); |
| 2307 | ath_tx_txqaddbuf(sc, txctl.txq, &bf_q, false); |
| 2308 | TX_STAT_INC(txctl.txq->axq_qnum, queued); |
| 2309 | ath_txq_unlock(sc, txctl.txq); |
| 2310 | } |
| 2311 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2312 | /*****************/ |
| 2313 | /* TX Completion */ |
| 2314 | /*****************/ |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2315 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2316 | 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] | 2317 | int tx_flags, struct ath_txq *txq) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2318 | { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2319 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 2320 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
Benoit Papillault | 4d91f9f | 2009-12-12 00:22:35 +0100 | [diff] [blame] | 2321 | struct ieee80211_hdr * hdr = (struct ieee80211_hdr *)skb->data; |
Felix Fietkau | a4943cc | 2013-06-30 12:02:13 +0200 | [diff] [blame] | 2322 | int padpos, padsize; |
Sujith Manoharan | 07c15a3 | 2012-06-04 20:24:07 +0530 | [diff] [blame] | 2323 | unsigned long flags; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2324 | |
Joe Perches | d2182b6 | 2011-12-15 14:55:53 -0800 | [diff] [blame] | 2325 | ath_dbg(common, XMIT, "TX complete: skb: %p\n", skb); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2326 | |
Felix Fietkau | 51dea9b | 2012-08-27 17:00:07 +0200 | [diff] [blame] | 2327 | if (sc->sc_ah->caldata) |
Sujith Manoharan | 4b9b42b | 2013-09-11 16:36:31 +0530 | [diff] [blame] | 2328 | set_bit(PAPRD_PACKET_SENT, &sc->sc_ah->caldata->cal_flags); |
Felix Fietkau | 51dea9b | 2012-08-27 17:00:07 +0200 | [diff] [blame] | 2329 | |
Felix Fietkau | 55797b1 | 2011-09-14 21:24:16 +0200 | [diff] [blame] | 2330 | if (!(tx_flags & ATH_TX_ERROR)) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2331 | /* Frame was ACKed */ |
| 2332 | tx_info->flags |= IEEE80211_TX_STAT_ACK; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2333 | |
Felix Fietkau | c60c992 | 2013-04-08 00:04:09 +0200 | [diff] [blame] | 2334 | padpos = ieee80211_hdrlen(hdr->frame_control); |
John W. Linville | 42cecc3 | 2011-09-19 15:42:31 -0400 | [diff] [blame] | 2335 | padsize = padpos & 3; |
| 2336 | if (padsize && skb->len>padpos+padsize) { |
| 2337 | /* |
| 2338 | * Remove MAC header padding before giving the frame back to |
| 2339 | * mac80211. |
| 2340 | */ |
| 2341 | memmove(skb->data + padsize, skb->data, padpos); |
| 2342 | skb_pull(skb, padsize); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2343 | } |
| 2344 | |
Sujith Manoharan | 07c15a3 | 2012-06-04 20:24:07 +0530 | [diff] [blame] | 2345 | spin_lock_irqsave(&sc->sc_pm_lock, flags); |
Felix Fietkau | c8e8868 | 2011-11-16 13:08:40 +0100 | [diff] [blame] | 2346 | if ((sc->ps_flags & PS_WAIT_FOR_TX_ACK) && !txq->axq_depth) { |
Sujith | 1b04b93 | 2010-01-08 10:36:05 +0530 | [diff] [blame] | 2347 | sc->ps_flags &= ~PS_WAIT_FOR_TX_ACK; |
Joe Perches | d2182b6 | 2011-12-15 14:55:53 -0800 | [diff] [blame] | 2348 | ath_dbg(common, PS, |
Joe Perches | 226afe6 | 2010-12-02 19:12:37 -0800 | [diff] [blame] | 2349 | "Going back to sleep after having received TX status (0x%lx)\n", |
Sujith | 1b04b93 | 2010-01-08 10:36:05 +0530 | [diff] [blame] | 2350 | sc->ps_flags & (PS_WAIT_FOR_BEACON | |
| 2351 | PS_WAIT_FOR_CAB | |
| 2352 | PS_WAIT_FOR_PSPOLL_DATA | |
| 2353 | PS_WAIT_FOR_TX_ACK)); |
Jouni Malinen | 9a23f9c | 2009-05-19 17:01:38 +0300 | [diff] [blame] | 2354 | } |
Sujith Manoharan | 07c15a3 | 2012-06-04 20:24:07 +0530 | [diff] [blame] | 2355 | spin_unlock_irqrestore(&sc->sc_pm_lock, flags); |
Jouni Malinen | 9a23f9c | 2009-05-19 17:01:38 +0300 | [diff] [blame] | 2356 | |
Felix Fietkau | f2c7a79 | 2013-06-07 18:12:00 +0200 | [diff] [blame] | 2357 | __skb_queue_tail(&txq->complete_q, skb); |
Felix Fietkau | a4943cc | 2013-06-30 12:02:13 +0200 | [diff] [blame] | 2358 | ath_txq_skb_done(sc, txq, skb); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2359 | } |
| 2360 | |
| 2361 | 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] | 2362 | struct ath_txq *txq, struct list_head *bf_q, |
Felix Fietkau | 156369f | 2011-12-14 22:08:04 +0100 | [diff] [blame] | 2363 | struct ath_tx_status *ts, int txok) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2364 | { |
| 2365 | struct sk_buff *skb = bf->bf_mpdu; |
Felix Fietkau | 3afd21e | 2011-09-14 21:24:26 +0200 | [diff] [blame] | 2366 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2367 | unsigned long flags; |
Vasanthakumar Thiagarajan | 6b2c403 | 2009-03-20 15:27:50 +0530 | [diff] [blame] | 2368 | int tx_flags = 0; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2369 | |
Felix Fietkau | 55797b1 | 2011-09-14 21:24:16 +0200 | [diff] [blame] | 2370 | if (!txok) |
Vasanthakumar Thiagarajan | 6b2c403 | 2009-03-20 15:27:50 +0530 | [diff] [blame] | 2371 | tx_flags |= ATH_TX_ERROR; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2372 | |
Felix Fietkau | 3afd21e | 2011-09-14 21:24:26 +0200 | [diff] [blame] | 2373 | if (ts->ts_status & ATH9K_TXERR_FILT) |
| 2374 | tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED; |
| 2375 | |
Ben Greear | c1739eb3 | 2010-10-14 12:45:29 -0700 | [diff] [blame] | 2376 | 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] | 2377 | bf->bf_buf_addr = 0; |
Luis R. Rodriguez | 89f927a | 2013-10-14 17:42:11 -0700 | [diff] [blame] | 2378 | if (sc->tx99_state) |
| 2379 | goto skip_tx_complete; |
Felix Fietkau | 9f42c2b | 2010-06-12 00:34:01 -0400 | [diff] [blame] | 2380 | |
| 2381 | if (bf->bf_state.bfs_paprd) { |
Mohammed Shafi Shajakhan | 9cf04dc | 2011-02-04 18:38:23 +0530 | [diff] [blame] | 2382 | if (time_after(jiffies, |
| 2383 | bf->bf_state.bfs_paprd_timestamp + |
| 2384 | msecs_to_jiffies(ATH_PAPRD_TIMEOUT))) |
Vasanthakumar Thiagarajan | ca369eb | 2010-06-24 02:42:44 -0700 | [diff] [blame] | 2385 | dev_kfree_skb_any(skb); |
Vasanthakumar Thiagarajan | 78a1817 | 2010-06-24 02:42:46 -0700 | [diff] [blame] | 2386 | else |
Vasanthakumar Thiagarajan | ca369eb | 2010-06-24 02:42:44 -0700 | [diff] [blame] | 2387 | complete(&sc->paprd_complete); |
Felix Fietkau | 9f42c2b | 2010-06-12 00:34:01 -0400 | [diff] [blame] | 2388 | } else { |
Felix Fietkau | 55797b1 | 2011-09-14 21:24:16 +0200 | [diff] [blame] | 2389 | ath_debug_stat_tx(sc, bf, ts, txq, tx_flags); |
Rajkumar Manoharan | 0f9dc29 | 2011-07-29 17:38:14 +0530 | [diff] [blame] | 2390 | ath_tx_complete(sc, skb, tx_flags, txq); |
Felix Fietkau | 9f42c2b | 2010-06-12 00:34:01 -0400 | [diff] [blame] | 2391 | } |
Luis R. Rodriguez | 89f927a | 2013-10-14 17:42:11 -0700 | [diff] [blame] | 2392 | skip_tx_complete: |
Ben Greear | 6cf9e99 | 2010-10-14 12:45:30 -0700 | [diff] [blame] | 2393 | /* At this point, skb (bf->bf_mpdu) is consumed...make sure we don't |
| 2394 | * accidentally reference it later. |
| 2395 | */ |
| 2396 | bf->bf_mpdu = NULL; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2397 | |
| 2398 | /* |
| 2399 | * Return the list of ath_buf of this mpdu to free queue |
| 2400 | */ |
| 2401 | spin_lock_irqsave(&sc->tx.txbuflock, flags); |
| 2402 | list_splice_tail_init(bf_q, &sc->tx.txbuf); |
| 2403 | spin_unlock_irqrestore(&sc->tx.txbuflock, flags); |
| 2404 | } |
| 2405 | |
Felix Fietkau | 0cdd5c6 | 2011-01-24 19:23:17 +0100 | [diff] [blame] | 2406 | static void ath_tx_rc_status(struct ath_softc *sc, struct ath_buf *bf, |
| 2407 | struct ath_tx_status *ts, int nframes, int nbad, |
Felix Fietkau | 3afd21e | 2011-09-14 21:24:26 +0200 | [diff] [blame] | 2408 | int txok) |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2409 | { |
Sujith | a22be22 | 2009-03-30 15:28:36 +0530 | [diff] [blame] | 2410 | struct sk_buff *skb = bf->bf_mpdu; |
Sujith | 254ad0f | 2009-02-04 08:10:19 +0530 | [diff] [blame] | 2411 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2412 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Felix Fietkau | 0cdd5c6 | 2011-01-24 19:23:17 +0100 | [diff] [blame] | 2413 | struct ieee80211_hw *hw = sc->hw; |
Felix Fietkau | f0c255a | 2010-11-11 03:18:35 +0100 | [diff] [blame] | 2414 | struct ath_hw *ah = sc->sc_ah; |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 2415 | u8 i, tx_rateindex; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2416 | |
Sujith | 95e4acb | 2009-03-13 08:56:09 +0530 | [diff] [blame] | 2417 | if (txok) |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 2418 | tx_info->status.ack_signal = ts->ts_rssi; |
Sujith | 95e4acb | 2009-03-13 08:56:09 +0530 | [diff] [blame] | 2419 | |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 2420 | tx_rateindex = ts->ts_rateindex; |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 2421 | WARN_ON(tx_rateindex >= hw->max_rates); |
| 2422 | |
Felix Fietkau | 3afd21e | 2011-09-14 21:24:26 +0200 | [diff] [blame] | 2423 | if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) { |
Felix Fietkau | d969847 | 2010-03-01 13:32:11 +0100 | [diff] [blame] | 2424 | tx_info->flags |= IEEE80211_TX_STAT_AMPDU; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2425 | |
Felix Fietkau | b572d03 | 2010-11-14 15:20:07 +0100 | [diff] [blame] | 2426 | BUG_ON(nbad > nframes); |
Björn Smedman | ebd0228 | 2010-10-10 22:44:39 +0200 | [diff] [blame] | 2427 | } |
Rajkumar Manoharan | 185d158 | 2011-09-26 21:48:39 +0530 | [diff] [blame] | 2428 | tx_info->status.ampdu_len = nframes; |
| 2429 | tx_info->status.ampdu_ack_len = nframes - nbad; |
Björn Smedman | ebd0228 | 2010-10-10 22:44:39 +0200 | [diff] [blame] | 2430 | |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 2431 | if ((ts->ts_status & ATH9K_TXERR_FILT) == 0 && |
Felix Fietkau | 3afd21e | 2011-09-14 21:24:26 +0200 | [diff] [blame] | 2432 | (tx_info->flags & IEEE80211_TX_CTL_NO_ACK) == 0) { |
Felix Fietkau | f0c255a | 2010-11-11 03:18:35 +0100 | [diff] [blame] | 2433 | /* |
| 2434 | * If an underrun error is seen assume it as an excessive |
| 2435 | * retry only if max frame trigger level has been reached |
| 2436 | * (2 KB for single stream, and 4 KB for dual stream). |
| 2437 | * Adjust the long retry as if the frame was tried |
| 2438 | * hw->max_rate_tries times to affect how rate control updates |
| 2439 | * PER for the failed rate. |
| 2440 | * In case of congestion on the bus penalizing this type of |
| 2441 | * underruns should help hardware actually transmit new frames |
| 2442 | * successfully by eventually preferring slower rates. |
| 2443 | * This itself should also alleviate congestion on the bus. |
| 2444 | */ |
Felix Fietkau | 3afd21e | 2011-09-14 21:24:26 +0200 | [diff] [blame] | 2445 | if (unlikely(ts->ts_flags & (ATH9K_TX_DATA_UNDERRUN | |
| 2446 | ATH9K_TX_DELIM_UNDERRUN)) && |
| 2447 | ieee80211_is_data(hdr->frame_control) && |
Felix Fietkau | 83860c5 | 2011-03-23 20:57:33 +0100 | [diff] [blame] | 2448 | ah->tx_trig_level >= sc->sc_ah->config.max_txtrig_level) |
Felix Fietkau | f0c255a | 2010-11-11 03:18:35 +0100 | [diff] [blame] | 2449 | tx_info->status.rates[tx_rateindex].count = |
| 2450 | hw->max_rate_tries; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2451 | } |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 2452 | |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 2453 | for (i = tx_rateindex + 1; i < hw->max_rates; i++) { |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 2454 | tx_info->status.rates[i].count = 0; |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 2455 | tx_info->status.rates[i].idx = -1; |
| 2456 | } |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 2457 | |
Felix Fietkau | 78c4653 | 2010-06-25 01:26:16 +0200 | [diff] [blame] | 2458 | tx_info->status.rates[tx_rateindex].count = ts->ts_longretry + 1; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2459 | } |
| 2460 | |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2461 | 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] | 2462 | { |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 2463 | struct ath_hw *ah = sc->sc_ah; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 2464 | struct ath_common *common = ath9k_hw_common(ah); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2465 | struct ath_buf *bf, *lastbf, *bf_held = NULL; |
| 2466 | struct list_head bf_head; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2467 | struct ath_desc *ds; |
Felix Fietkau | 29bffa9 | 2010-03-29 20:14:23 -0700 | [diff] [blame] | 2468 | struct ath_tx_status ts; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2469 | int status; |
| 2470 | |
Joe Perches | d2182b6 | 2011-12-15 14:55:53 -0800 | [diff] [blame] | 2471 | ath_dbg(common, QUEUE, "tx queue %d (%x), link %p\n", |
Joe Perches | 226afe6 | 2010-12-02 19:12:37 -0800 | [diff] [blame] | 2472 | txq->axq_qnum, ath9k_hw_gettxbuf(sc->sc_ah, txq->axq_qnum), |
| 2473 | txq->axq_link); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2474 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 2475 | ath_txq_lock(sc, txq); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2476 | for (;;) { |
Rajkumar Manoharan | 124b979 | 2012-07-17 17:16:42 +0530 | [diff] [blame] | 2477 | if (test_bit(SC_OP_HW_RESET, &sc->sc_flags)) |
Felix Fietkau | 236de51 | 2011-09-03 01:40:25 +0200 | [diff] [blame] | 2478 | break; |
| 2479 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2480 | if (list_empty(&txq->axq_q)) { |
| 2481 | txq->axq_link = NULL; |
Felix Fietkau | 73364b0 | 2013-08-06 14:18:08 +0200 | [diff] [blame] | 2482 | ath_txq_schedule(sc, txq); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2483 | break; |
| 2484 | } |
| 2485 | bf = list_first_entry(&txq->axq_q, struct ath_buf, list); |
| 2486 | |
| 2487 | /* |
| 2488 | * There is a race condition that a BH gets scheduled |
| 2489 | * after sw writes TxE and before hw re-load the last |
| 2490 | * descriptor to get the newly chained one. |
| 2491 | * Software must keep the last DONE descriptor as a |
| 2492 | * holding descriptor - software does so by marking |
| 2493 | * it with the STALE flag. |
| 2494 | */ |
| 2495 | bf_held = NULL; |
Felix Fietkau | 50676b8 | 2013-08-10 15:59:16 +0200 | [diff] [blame] | 2496 | if (bf->bf_state.stale) { |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2497 | bf_held = bf; |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2498 | if (list_is_last(&bf_held->list, &txq->axq_q)) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2499 | break; |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2500 | |
| 2501 | bf = list_entry(bf_held->list.next, struct ath_buf, |
| 2502 | list); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2503 | } |
| 2504 | |
| 2505 | lastbf = bf->bf_lastbf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2506 | ds = lastbf->bf_desc; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2507 | |
Felix Fietkau | 29bffa9 | 2010-03-29 20:14:23 -0700 | [diff] [blame] | 2508 | memset(&ts, 0, sizeof(ts)); |
| 2509 | status = ath9k_hw_txprocdesc(ah, ds, &ts); |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2510 | if (status == -EINPROGRESS) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2511 | break; |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2512 | |
Ben Greear | 2dac4fb | 2011-01-09 23:11:45 -0800 | [diff] [blame] | 2513 | TX_STAT_INC(txq->axq_qnum, txprocdesc); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2514 | |
| 2515 | /* |
| 2516 | * Remove ath_buf's of the same transmit unit from txq, |
| 2517 | * however leave the last descriptor back as the holding |
| 2518 | * descriptor for hw. |
| 2519 | */ |
Felix Fietkau | 50676b8 | 2013-08-10 15:59:16 +0200 | [diff] [blame] | 2520 | lastbf->bf_state.stale = true; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2521 | INIT_LIST_HEAD(&bf_head); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2522 | if (!list_is_singular(&lastbf->list)) |
| 2523 | list_cut_position(&bf_head, |
| 2524 | &txq->axq_q, lastbf->list.prev); |
| 2525 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2526 | if (bf_held) { |
Felix Fietkau | 0a8cea8 | 2010-04-19 19:57:30 +0200 | [diff] [blame] | 2527 | list_del(&bf_held->list); |
Felix Fietkau | 0a8cea8 | 2010-04-19 19:57:30 +0200 | [diff] [blame] | 2528 | ath_tx_return_buffer(sc, bf_held); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2529 | } |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 2530 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2531 | ath_tx_process_buffer(sc, txq, &ts, bf, &bf_head); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2532 | } |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 2533 | ath_txq_unlock_complete(sc, txq); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2534 | } |
| 2535 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2536 | void ath_tx_tasklet(struct ath_softc *sc) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2537 | { |
Felix Fietkau | 239c795 | 2012-03-14 16:40:26 +0100 | [diff] [blame] | 2538 | struct ath_hw *ah = sc->sc_ah; |
| 2539 | u32 qcumask = ((1 << ATH9K_NUM_TX_QUEUES) - 1) & ah->intr_txqs; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2540 | int i; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2541 | |
| 2542 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2543 | if (ATH_TXQ_SETUP(sc, i) && (qcumask & (1 << i))) |
| 2544 | ath_tx_processq(sc, &sc->tx.txq[i]); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2545 | } |
| 2546 | } |
| 2547 | |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2548 | void ath_tx_edma_tasklet(struct ath_softc *sc) |
| 2549 | { |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2550 | struct ath_tx_status ts; |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2551 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
| 2552 | struct ath_hw *ah = sc->sc_ah; |
| 2553 | struct ath_txq *txq; |
| 2554 | struct ath_buf *bf, *lastbf; |
| 2555 | struct list_head bf_head; |
Felix Fietkau | 99ba6a4 | 2013-04-08 00:04:13 +0200 | [diff] [blame] | 2556 | struct list_head *fifo_list; |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2557 | int status; |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2558 | |
| 2559 | for (;;) { |
Rajkumar Manoharan | 124b979 | 2012-07-17 17:16:42 +0530 | [diff] [blame] | 2560 | if (test_bit(SC_OP_HW_RESET, &sc->sc_flags)) |
Felix Fietkau | 236de51 | 2011-09-03 01:40:25 +0200 | [diff] [blame] | 2561 | break; |
| 2562 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2563 | status = ath9k_hw_txprocdesc(ah, NULL, (void *)&ts); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2564 | if (status == -EINPROGRESS) |
| 2565 | break; |
| 2566 | if (status == -EIO) { |
Joe Perches | d2182b6 | 2011-12-15 14:55:53 -0800 | [diff] [blame] | 2567 | ath_dbg(common, XMIT, "Error processing tx status\n"); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2568 | break; |
| 2569 | } |
| 2570 | |
Felix Fietkau | 4e0ad25 | 2012-02-27 19:58:42 +0100 | [diff] [blame] | 2571 | /* Process beacon completions separately */ |
| 2572 | if (ts.qid == sc->beacon.beaconq) { |
| 2573 | sc->beacon.tx_processed = true; |
| 2574 | sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK); |
Simon Wunderlich | d074e8d | 2013-08-14 08:01:38 +0200 | [diff] [blame] | 2575 | |
| 2576 | ath9k_csa_is_finished(sc); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2577 | continue; |
Felix Fietkau | 4e0ad25 | 2012-02-27 19:58:42 +0100 | [diff] [blame] | 2578 | } |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2579 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2580 | txq = &sc->tx.txq[ts.qid]; |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2581 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 2582 | ath_txq_lock(sc, txq); |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2583 | |
Sujith Manoharan | 78ef731 | 2012-11-21 18:13:11 +0530 | [diff] [blame] | 2584 | TX_STAT_INC(txq->axq_qnum, txprocdesc); |
| 2585 | |
Felix Fietkau | 99ba6a4 | 2013-04-08 00:04:13 +0200 | [diff] [blame] | 2586 | fifo_list = &txq->txq_fifo[txq->txq_tailidx]; |
| 2587 | if (list_empty(fifo_list)) { |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 2588 | ath_txq_unlock(sc, txq); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2589 | return; |
| 2590 | } |
| 2591 | |
Felix Fietkau | 99ba6a4 | 2013-04-08 00:04:13 +0200 | [diff] [blame] | 2592 | bf = list_first_entry(fifo_list, struct ath_buf, list); |
Felix Fietkau | 50676b8 | 2013-08-10 15:59:16 +0200 | [diff] [blame] | 2593 | if (bf->bf_state.stale) { |
Felix Fietkau | 99ba6a4 | 2013-04-08 00:04:13 +0200 | [diff] [blame] | 2594 | list_del(&bf->list); |
| 2595 | ath_tx_return_buffer(sc, bf); |
| 2596 | bf = list_first_entry(fifo_list, struct ath_buf, list); |
| 2597 | } |
| 2598 | |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2599 | lastbf = bf->bf_lastbf; |
| 2600 | |
| 2601 | INIT_LIST_HEAD(&bf_head); |
Felix Fietkau | 99ba6a4 | 2013-04-08 00:04:13 +0200 | [diff] [blame] | 2602 | if (list_is_last(&lastbf->list, fifo_list)) { |
| 2603 | list_splice_tail_init(fifo_list, &bf_head); |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2604 | INCR(txq->txq_tailidx, ATH_TXFIFO_DEPTH); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2605 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2606 | if (!list_empty(&txq->axq_q)) { |
| 2607 | struct list_head bf_q; |
| 2608 | |
| 2609 | INIT_LIST_HEAD(&bf_q); |
| 2610 | txq->axq_link = NULL; |
| 2611 | list_splice_tail_init(&txq->axq_q, &bf_q); |
| 2612 | ath_tx_txqaddbuf(sc, txq, &bf_q, true); |
| 2613 | } |
Felix Fietkau | 99ba6a4 | 2013-04-08 00:04:13 +0200 | [diff] [blame] | 2614 | } else { |
Felix Fietkau | 50676b8 | 2013-08-10 15:59:16 +0200 | [diff] [blame] | 2615 | lastbf->bf_state.stale = true; |
Felix Fietkau | 99ba6a4 | 2013-04-08 00:04:13 +0200 | [diff] [blame] | 2616 | if (bf != lastbf) |
| 2617 | list_cut_position(&bf_head, fifo_list, |
| 2618 | lastbf->list.prev); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2619 | } |
| 2620 | |
Felix Fietkau | fce041b | 2011-05-19 12:20:25 +0200 | [diff] [blame] | 2621 | ath_tx_process_buffer(sc, txq, &ts, bf, &bf_head); |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 2622 | ath_txq_unlock_complete(sc, txq); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2623 | } |
| 2624 | } |
| 2625 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2626 | /*****************/ |
| 2627 | /* Init, Cleanup */ |
| 2628 | /*****************/ |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2629 | |
Vasanthakumar Thiagarajan | 5088c2f | 2010-04-15 17:39:34 -0400 | [diff] [blame] | 2630 | static int ath_txstatus_setup(struct ath_softc *sc, int size) |
| 2631 | { |
| 2632 | struct ath_descdma *dd = &sc->txsdma; |
| 2633 | u8 txs_len = sc->sc_ah->caps.txs_len; |
| 2634 | |
| 2635 | dd->dd_desc_len = size * txs_len; |
Felix Fietkau | b81950b1 | 2012-12-12 13:14:22 +0100 | [diff] [blame] | 2636 | dd->dd_desc = dmam_alloc_coherent(sc->dev, dd->dd_desc_len, |
| 2637 | &dd->dd_desc_paddr, GFP_KERNEL); |
Vasanthakumar Thiagarajan | 5088c2f | 2010-04-15 17:39:34 -0400 | [diff] [blame] | 2638 | if (!dd->dd_desc) |
| 2639 | return -ENOMEM; |
| 2640 | |
| 2641 | return 0; |
| 2642 | } |
| 2643 | |
| 2644 | static int ath_tx_edma_init(struct ath_softc *sc) |
| 2645 | { |
| 2646 | int err; |
| 2647 | |
| 2648 | err = ath_txstatus_setup(sc, ATH_TXSTATUS_RING_SIZE); |
| 2649 | if (!err) |
| 2650 | ath9k_hw_setup_statusring(sc->sc_ah, sc->txsdma.dd_desc, |
| 2651 | sc->txsdma.dd_desc_paddr, |
| 2652 | ATH_TXSTATUS_RING_SIZE); |
| 2653 | |
| 2654 | return err; |
| 2655 | } |
| 2656 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2657 | int ath_tx_init(struct ath_softc *sc, int nbufs) |
| 2658 | { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 2659 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2660 | int error = 0; |
| 2661 | |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2662 | spin_lock_init(&sc->tx.txbuflock); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2663 | |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2664 | error = ath_descdma_setup(sc, &sc->tx.txdma, &sc->tx.txbuf, |
Vasanthakumar Thiagarajan | 4adfcde | 2010-04-15 17:39:33 -0400 | [diff] [blame] | 2665 | "tx", nbufs, 1, 1); |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2666 | if (error != 0) { |
Joe Perches | 3800276 | 2010-12-02 19:12:36 -0800 | [diff] [blame] | 2667 | ath_err(common, |
| 2668 | "Failed to allocate tx descriptors: %d\n", error); |
Felix Fietkau | b81950b1 | 2012-12-12 13:14:22 +0100 | [diff] [blame] | 2669 | return error; |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2670 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2671 | |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2672 | error = ath_descdma_setup(sc, &sc->beacon.bdma, &sc->beacon.bbuf, |
Vasanthakumar Thiagarajan | 5088c2f | 2010-04-15 17:39:34 -0400 | [diff] [blame] | 2673 | "beacon", ATH_BCBUF, 1, 1); |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2674 | if (error != 0) { |
Joe Perches | 3800276 | 2010-12-02 19:12:36 -0800 | [diff] [blame] | 2675 | ath_err(common, |
| 2676 | "Failed to allocate beacon descriptors: %d\n", error); |
Felix Fietkau | b81950b1 | 2012-12-12 13:14:22 +0100 | [diff] [blame] | 2677 | return error; |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2678 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2679 | |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 2680 | INIT_DELAYED_WORK(&sc->tx_complete_work, ath_tx_complete_poll_work); |
| 2681 | |
Felix Fietkau | b81950b1 | 2012-12-12 13:14:22 +0100 | [diff] [blame] | 2682 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) |
Vasanthakumar Thiagarajan | 5088c2f | 2010-04-15 17:39:34 -0400 | [diff] [blame] | 2683 | error = ath_tx_edma_init(sc); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2684 | |
| 2685 | return error; |
| 2686 | } |
| 2687 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2688 | void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an) |
| 2689 | { |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2690 | struct ath_atx_tid *tid; |
| 2691 | struct ath_atx_ac *ac; |
| 2692 | int tidno, acno; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2693 | |
Sujith | 8ee5afb | 2008-12-07 21:43:36 +0530 | [diff] [blame] | 2694 | for (tidno = 0, tid = &an->tid[tidno]; |
Sujith Manoharan | de7b760 | 2012-11-28 15:08:53 +0530 | [diff] [blame] | 2695 | tidno < IEEE80211_NUM_TIDS; |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2696 | tidno++, tid++) { |
| 2697 | tid->an = an; |
| 2698 | tid->tidno = tidno; |
| 2699 | tid->seq_start = tid->seq_next = 0; |
| 2700 | tid->baw_size = WME_MAX_BA; |
| 2701 | tid->baw_head = tid->baw_tail = 0; |
| 2702 | tid->sched = false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2703 | tid->paused = false; |
Felix Fietkau | 08c96ab | 2013-05-18 21:28:15 +0200 | [diff] [blame] | 2704 | tid->active = false; |
Felix Fietkau | 56dc633 | 2011-08-28 00:32:22 +0200 | [diff] [blame] | 2705 | __skb_queue_head_init(&tid->buf_q); |
Felix Fietkau | bb195ff | 2013-08-06 14:18:03 +0200 | [diff] [blame] | 2706 | __skb_queue_head_init(&tid->retry_q); |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2707 | acno = TID_TO_WME_AC(tidno); |
Sujith | 8ee5afb | 2008-12-07 21:43:36 +0530 | [diff] [blame] | 2708 | tid->ac = &an->ac[acno]; |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2709 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2710 | |
Sujith | 8ee5afb | 2008-12-07 21:43:36 +0530 | [diff] [blame] | 2711 | for (acno = 0, ac = &an->ac[acno]; |
Sujith Manoharan | bea843c | 2012-11-21 18:13:10 +0530 | [diff] [blame] | 2712 | acno < IEEE80211_NUM_ACS; acno++, ac++) { |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2713 | ac->sched = false; |
Felix Fietkau | 026d5b0 | 2013-08-06 14:18:10 +0200 | [diff] [blame] | 2714 | ac->clear_ps_filter = true; |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 2715 | ac->txq = sc->tx.txq_map[acno]; |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2716 | INIT_LIST_HEAD(&ac->tid_q); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2717 | } |
| 2718 | } |
| 2719 | |
Sujith | b5aa9bf | 2008-10-29 10:13:31 +0530 | [diff] [blame] | 2720 | 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] | 2721 | { |
Felix Fietkau | 2b40994 | 2010-07-07 19:42:08 +0200 | [diff] [blame] | 2722 | struct ath_atx_ac *ac; |
| 2723 | struct ath_atx_tid *tid; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2724 | struct ath_txq *txq; |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 2725 | int tidno; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2726 | |
Felix Fietkau | 2b40994 | 2010-07-07 19:42:08 +0200 | [diff] [blame] | 2727 | for (tidno = 0, tid = &an->tid[tidno]; |
Sujith Manoharan | de7b760 | 2012-11-28 15:08:53 +0530 | [diff] [blame] | 2728 | tidno < IEEE80211_NUM_TIDS; tidno++, tid++) { |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2729 | |
Felix Fietkau | 2b40994 | 2010-07-07 19:42:08 +0200 | [diff] [blame] | 2730 | ac = tid->ac; |
Felix Fietkau | 066dae9 | 2010-11-07 14:59:39 +0100 | [diff] [blame] | 2731 | txq = ac->txq; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2732 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 2733 | ath_txq_lock(sc, txq); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2734 | |
Felix Fietkau | 2b40994 | 2010-07-07 19:42:08 +0200 | [diff] [blame] | 2735 | if (tid->sched) { |
| 2736 | list_del(&tid->list); |
| 2737 | tid->sched = false; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2738 | } |
Felix Fietkau | 2b40994 | 2010-07-07 19:42:08 +0200 | [diff] [blame] | 2739 | |
| 2740 | if (ac->sched) { |
| 2741 | list_del(&ac->list); |
| 2742 | tid->ac->sched = false; |
| 2743 | } |
| 2744 | |
| 2745 | ath_tid_drain(sc, txq, tid); |
Felix Fietkau | 08c96ab | 2013-05-18 21:28:15 +0200 | [diff] [blame] | 2746 | tid->active = false; |
Felix Fietkau | 2b40994 | 2010-07-07 19:42:08 +0200 | [diff] [blame] | 2747 | |
Felix Fietkau | 23de5dc | 2011-12-19 16:45:54 +0100 | [diff] [blame] | 2748 | ath_txq_unlock(sc, txq); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2749 | } |
| 2750 | } |
Luis R. Rodriguez | 89f927a | 2013-10-14 17:42:11 -0700 | [diff] [blame] | 2751 | |
Sujith Manoharan | ef6b19e | 2013-10-24 12:04:39 +0530 | [diff] [blame^] | 2752 | #ifdef CONFIG_ATH9K_TX99 |
| 2753 | |
Luis R. Rodriguez | 89f927a | 2013-10-14 17:42:11 -0700 | [diff] [blame] | 2754 | int ath9k_tx99_send(struct ath_softc *sc, struct sk_buff *skb, |
| 2755 | struct ath_tx_control *txctl) |
| 2756 | { |
| 2757 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 2758 | struct ath_frame_info *fi = get_frame_info(skb); |
| 2759 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
| 2760 | struct ath_buf *bf; |
| 2761 | int padpos, padsize; |
| 2762 | |
| 2763 | padpos = ieee80211_hdrlen(hdr->frame_control); |
| 2764 | padsize = padpos & 3; |
| 2765 | |
| 2766 | if (padsize && skb->len > padpos) { |
| 2767 | if (skb_headroom(skb) < padsize) { |
| 2768 | ath_dbg(common, XMIT, |
| 2769 | "tx99 padding failed\n"); |
| 2770 | return -EINVAL; |
| 2771 | } |
| 2772 | |
| 2773 | skb_push(skb, padsize); |
| 2774 | memmove(skb->data, skb->data + padsize, padpos); |
| 2775 | } |
| 2776 | |
| 2777 | fi->keyix = ATH9K_TXKEYIX_INVALID; |
| 2778 | fi->framelen = skb->len + FCS_LEN; |
| 2779 | fi->keytype = ATH9K_KEY_TYPE_CLEAR; |
| 2780 | |
| 2781 | bf = ath_tx_setup_buffer(sc, txctl->txq, NULL, skb); |
| 2782 | if (!bf) { |
| 2783 | ath_dbg(common, XMIT, "tx99 buffer setup failed\n"); |
| 2784 | return -EINVAL; |
| 2785 | } |
| 2786 | |
| 2787 | ath_set_rates(sc->tx99_vif, NULL, bf); |
| 2788 | |
| 2789 | ath9k_hw_set_desc_link(sc->sc_ah, bf->bf_desc, bf->bf_daddr); |
| 2790 | ath9k_hw_tx99_start(sc->sc_ah, txctl->txq->axq_qnum); |
| 2791 | |
| 2792 | ath_tx_send_normal(sc, txctl->txq, NULL, skb); |
| 2793 | |
| 2794 | return 0; |
| 2795 | } |
Sujith Manoharan | ef6b19e | 2013-10-24 12:04:39 +0530 | [diff] [blame^] | 2796 | |
| 2797 | #endif /* CONFIG_ATH9K_TX99 */ |