Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1 | /* |
Sujith | cee075a | 2009-03-13 09:07:23 +0530 | [diff] [blame] | 2 | * Copyright (c) 2008-2009 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 | |
Sujith | 394cf0a | 2009-02-09 13:26:54 +0530 | [diff] [blame] | 17 | #include "ath9k.h" |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 18 | |
| 19 | #define BITS_PER_BYTE 8 |
| 20 | #define OFDM_PLCP_BITS 22 |
| 21 | #define HT_RC_2_MCS(_rc) ((_rc) & 0x0f) |
| 22 | #define HT_RC_2_STREAMS(_rc) ((((_rc) & 0x78) >> 3) + 1) |
| 23 | #define L_STF 8 |
| 24 | #define L_LTF 8 |
| 25 | #define L_SIG 4 |
| 26 | #define HT_SIG 8 |
| 27 | #define HT_STF 4 |
| 28 | #define HT_LTF(_ns) (4 * (_ns)) |
| 29 | #define SYMBOL_TIME(_ns) ((_ns) << 2) /* ns * 4 us */ |
| 30 | #define SYMBOL_TIME_HALFGI(_ns) (((_ns) * 18 + 4) / 5) /* ns * 3.6 us */ |
| 31 | #define NUM_SYMBOLS_PER_USEC(_usec) (_usec >> 2) |
| 32 | #define NUM_SYMBOLS_PER_USEC_HALFGI(_usec) (((_usec*5)-4)/18) |
| 33 | |
| 34 | #define OFDM_SIFS_TIME 16 |
| 35 | |
| 36 | static u32 bits_per_symbol[][2] = { |
| 37 | /* 20MHz 40MHz */ |
| 38 | { 26, 54 }, /* 0: BPSK */ |
| 39 | { 52, 108 }, /* 1: QPSK 1/2 */ |
| 40 | { 78, 162 }, /* 2: QPSK 3/4 */ |
| 41 | { 104, 216 }, /* 3: 16-QAM 1/2 */ |
| 42 | { 156, 324 }, /* 4: 16-QAM 3/4 */ |
| 43 | { 208, 432 }, /* 5: 64-QAM 2/3 */ |
| 44 | { 234, 486 }, /* 6: 64-QAM 3/4 */ |
| 45 | { 260, 540 }, /* 7: 64-QAM 5/6 */ |
| 46 | { 52, 108 }, /* 8: BPSK */ |
| 47 | { 104, 216 }, /* 9: QPSK 1/2 */ |
| 48 | { 156, 324 }, /* 10: QPSK 3/4 */ |
| 49 | { 208, 432 }, /* 11: 16-QAM 1/2 */ |
| 50 | { 312, 648 }, /* 12: 16-QAM 3/4 */ |
| 51 | { 416, 864 }, /* 13: 64-QAM 2/3 */ |
| 52 | { 468, 972 }, /* 14: 64-QAM 3/4 */ |
| 53 | { 520, 1080 }, /* 15: 64-QAM 5/6 */ |
| 54 | }; |
| 55 | |
| 56 | #define IS_HT_RATE(_rate) ((_rate) & 0x80) |
| 57 | |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 58 | static void ath_tx_send_ht_normal(struct ath_softc *sc, struct ath_txq *txq, |
| 59 | struct ath_atx_tid *tid, |
| 60 | struct list_head *bf_head); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 61 | static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 62 | struct ath_txq *txq, |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 63 | struct list_head *bf_q, |
| 64 | int txok, int sendbar); |
| 65 | static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, |
| 66 | struct list_head *head); |
| 67 | static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf); |
Vasanthakumar Thiagarajan | 0934af2 | 2009-03-18 20:22:00 +0530 | [diff] [blame] | 68 | static int ath_tx_num_badfrms(struct ath_softc *sc, struct ath_buf *bf, |
| 69 | int txok); |
| 70 | static void ath_tx_rc_status(struct ath_buf *bf, struct ath_desc *ds, |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 71 | int nbad, int txok, bool update_rc); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 72 | |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 73 | enum { |
| 74 | MCS_DEFAULT, |
| 75 | MCS_HT40, |
| 76 | MCS_HT40_SGI, |
| 77 | }; |
| 78 | |
| 79 | static int ath_max_4ms_framelen[3][16] = { |
| 80 | [MCS_DEFAULT] = { |
| 81 | 3216, 6434, 9650, 12868, 19304, 25740, 28956, 32180, |
| 82 | 6430, 12860, 19300, 25736, 38600, 51472, 57890, 64320, |
| 83 | }, |
| 84 | [MCS_HT40] = { |
| 85 | 6684, 13368, 20052, 26738, 40104, 53476, 60156, 66840, |
| 86 | 13360, 26720, 40080, 53440, 80160, 106880, 120240, 133600, |
| 87 | }, |
| 88 | [MCS_HT40_SGI] = { |
| 89 | /* TODO: Only MCS 7 and 15 updated, recalculate the rest */ |
| 90 | 6684, 13368, 20052, 26738, 40104, 53476, 60156, 74200, |
| 91 | 13360, 26720, 40080, 53440, 80160, 106880, 120240, 148400, |
| 92 | } |
| 93 | }; |
| 94 | |
| 95 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 96 | /*********************/ |
| 97 | /* Aggregation logic */ |
| 98 | /*********************/ |
| 99 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 100 | static void ath_tx_queue_tid(struct ath_txq *txq, struct ath_atx_tid *tid) |
| 101 | { |
| 102 | struct ath_atx_ac *ac = tid->ac; |
| 103 | |
| 104 | if (tid->paused) |
| 105 | return; |
| 106 | |
| 107 | if (tid->sched) |
| 108 | return; |
| 109 | |
| 110 | tid->sched = true; |
| 111 | list_add_tail(&tid->list, &ac->tid_q); |
| 112 | |
| 113 | if (ac->sched) |
| 114 | return; |
| 115 | |
| 116 | ac->sched = true; |
| 117 | list_add_tail(&ac->list, &txq->axq_acq); |
| 118 | } |
| 119 | |
| 120 | static void ath_tx_pause_tid(struct ath_softc *sc, struct ath_atx_tid *tid) |
| 121 | { |
| 122 | struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum]; |
| 123 | |
| 124 | spin_lock_bh(&txq->axq_lock); |
| 125 | tid->paused++; |
| 126 | spin_unlock_bh(&txq->axq_lock); |
| 127 | } |
| 128 | |
| 129 | static void ath_tx_resume_tid(struct ath_softc *sc, struct ath_atx_tid *tid) |
| 130 | { |
| 131 | struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum]; |
| 132 | |
Luis R. Rodriguez | 9680e8a | 2009-09-13 23:28:00 -0700 | [diff] [blame] | 133 | BUG_ON(tid->paused <= 0); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 134 | spin_lock_bh(&txq->axq_lock); |
| 135 | |
| 136 | tid->paused--; |
| 137 | |
| 138 | if (tid->paused > 0) |
| 139 | goto unlock; |
| 140 | |
| 141 | if (list_empty(&tid->buf_q)) |
| 142 | goto unlock; |
| 143 | |
| 144 | ath_tx_queue_tid(txq, tid); |
| 145 | ath_txq_schedule(sc, txq); |
| 146 | unlock: |
| 147 | spin_unlock_bh(&txq->axq_lock); |
| 148 | } |
| 149 | |
| 150 | static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid) |
| 151 | { |
| 152 | struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum]; |
| 153 | struct ath_buf *bf; |
| 154 | struct list_head bf_head; |
| 155 | INIT_LIST_HEAD(&bf_head); |
| 156 | |
Luis R. Rodriguez | 9680e8a | 2009-09-13 23:28:00 -0700 | [diff] [blame] | 157 | BUG_ON(tid->paused <= 0); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 158 | spin_lock_bh(&txq->axq_lock); |
| 159 | |
| 160 | tid->paused--; |
| 161 | |
| 162 | if (tid->paused > 0) { |
| 163 | spin_unlock_bh(&txq->axq_lock); |
| 164 | return; |
| 165 | } |
| 166 | |
| 167 | while (!list_empty(&tid->buf_q)) { |
| 168 | bf = list_first_entry(&tid->buf_q, struct ath_buf, list); |
Luis R. Rodriguez | 9680e8a | 2009-09-13 23:28:00 -0700 | [diff] [blame] | 169 | BUG_ON(bf_isretried(bf)); |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 170 | list_move_tail(&bf->list, &bf_head); |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 171 | ath_tx_send_ht_normal(sc, txq, tid, &bf_head); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 172 | } |
| 173 | |
| 174 | spin_unlock_bh(&txq->axq_lock); |
| 175 | } |
| 176 | |
| 177 | static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid, |
| 178 | int seqno) |
| 179 | { |
| 180 | int index, cindex; |
| 181 | |
| 182 | index = ATH_BA_INDEX(tid->seq_start, seqno); |
| 183 | cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); |
| 184 | |
| 185 | tid->tx_buf[cindex] = NULL; |
| 186 | |
| 187 | while (tid->baw_head != tid->baw_tail && !tid->tx_buf[tid->baw_head]) { |
| 188 | INCR(tid->seq_start, IEEE80211_SEQ_MAX); |
| 189 | INCR(tid->baw_head, ATH_TID_MAX_BUFS); |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | static void ath_tx_addto_baw(struct ath_softc *sc, struct ath_atx_tid *tid, |
| 194 | struct ath_buf *bf) |
| 195 | { |
| 196 | int index, cindex; |
| 197 | |
| 198 | if (bf_isretried(bf)) |
| 199 | return; |
| 200 | |
| 201 | index = ATH_BA_INDEX(tid->seq_start, bf->bf_seqno); |
| 202 | cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); |
| 203 | |
Luis R. Rodriguez | 9680e8a | 2009-09-13 23:28:00 -0700 | [diff] [blame] | 204 | BUG_ON(tid->tx_buf[cindex] != NULL); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 205 | tid->tx_buf[cindex] = bf; |
| 206 | |
| 207 | if (index >= ((tid->baw_tail - tid->baw_head) & |
| 208 | (ATH_TID_MAX_BUFS - 1))) { |
| 209 | tid->baw_tail = cindex; |
| 210 | INCR(tid->baw_tail, ATH_TID_MAX_BUFS); |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | /* |
| 215 | * TODO: For frame(s) that are in the retry state, we will reuse the |
| 216 | * sequence number(s) without setting the retry bit. The |
| 217 | * alternative is to give up on these and BAR the receiver's window |
| 218 | * forward. |
| 219 | */ |
| 220 | static void ath_tid_drain(struct ath_softc *sc, struct ath_txq *txq, |
| 221 | struct ath_atx_tid *tid) |
| 222 | |
| 223 | { |
| 224 | struct ath_buf *bf; |
| 225 | struct list_head bf_head; |
| 226 | INIT_LIST_HEAD(&bf_head); |
| 227 | |
| 228 | for (;;) { |
| 229 | if (list_empty(&tid->buf_q)) |
| 230 | break; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 231 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 232 | bf = list_first_entry(&tid->buf_q, struct ath_buf, list); |
| 233 | list_move_tail(&bf->list, &bf_head); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 234 | |
| 235 | if (bf_isretried(bf)) |
| 236 | ath_tx_update_baw(sc, tid, bf->bf_seqno); |
| 237 | |
| 238 | spin_unlock(&txq->axq_lock); |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 239 | ath_tx_complete_buf(sc, bf, txq, &bf_head, 0, 0); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 240 | spin_lock(&txq->axq_lock); |
| 241 | } |
| 242 | |
| 243 | tid->seq_next = tid->seq_start; |
| 244 | tid->baw_tail = tid->baw_head; |
| 245 | } |
| 246 | |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 247 | static void ath_tx_set_retry(struct ath_softc *sc, struct ath_txq *txq, |
| 248 | struct ath_buf *bf) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 249 | { |
| 250 | struct sk_buff *skb; |
| 251 | struct ieee80211_hdr *hdr; |
| 252 | |
| 253 | bf->bf_state.bf_type |= BUF_RETRY; |
| 254 | bf->bf_retries++; |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 255 | TX_STAT_INC(txq->axq_qnum, a_retries); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 256 | |
| 257 | skb = bf->bf_mpdu; |
| 258 | hdr = (struct ieee80211_hdr *)skb->data; |
| 259 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_RETRY); |
| 260 | } |
| 261 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 262 | static struct ath_buf* ath_clone_txbuf(struct ath_softc *sc, struct ath_buf *bf) |
| 263 | { |
| 264 | struct ath_buf *tbf; |
| 265 | |
| 266 | spin_lock_bh(&sc->tx.txbuflock); |
Vasanthakumar Thiagarajan | 8a46097 | 2009-06-10 17:50:09 +0530 | [diff] [blame] | 267 | if (WARN_ON(list_empty(&sc->tx.txbuf))) { |
| 268 | spin_unlock_bh(&sc->tx.txbuflock); |
| 269 | return NULL; |
| 270 | } |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 271 | tbf = list_first_entry(&sc->tx.txbuf, struct ath_buf, list); |
| 272 | list_del(&tbf->list); |
| 273 | spin_unlock_bh(&sc->tx.txbuflock); |
| 274 | |
| 275 | ATH_TXBUF_RESET(tbf); |
| 276 | |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 277 | tbf->aphy = bf->aphy; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 278 | tbf->bf_mpdu = bf->bf_mpdu; |
| 279 | tbf->bf_buf_addr = bf->bf_buf_addr; |
| 280 | *(tbf->bf_desc) = *(bf->bf_desc); |
| 281 | tbf->bf_state = bf->bf_state; |
| 282 | tbf->bf_dmacontext = bf->bf_dmacontext; |
| 283 | |
| 284 | return tbf; |
| 285 | } |
| 286 | |
| 287 | static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq, |
| 288 | struct ath_buf *bf, struct list_head *bf_q, |
| 289 | int txok) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 290 | { |
| 291 | struct ath_node *an = NULL; |
| 292 | struct sk_buff *skb; |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 293 | struct ieee80211_sta *sta; |
Luis R. Rodriguez | 76d5a9e | 2009-11-02 16:08:34 -0800 | [diff] [blame] | 294 | struct ieee80211_hw *hw; |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 295 | struct ieee80211_hdr *hdr; |
Luis R. Rodriguez | 76d5a9e | 2009-11-02 16:08:34 -0800 | [diff] [blame] | 296 | struct ieee80211_tx_info *tx_info; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 297 | struct ath_atx_tid *tid = NULL; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 298 | struct ath_buf *bf_next, *bf_last = bf->bf_lastbf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 299 | struct ath_desc *ds = bf_last->bf_desc; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 300 | struct list_head bf_head, bf_pending; |
Vasanthakumar Thiagarajan | 0934af2 | 2009-03-18 20:22:00 +0530 | [diff] [blame] | 301 | u16 seq_st = 0, acked_cnt = 0, txfail_cnt = 0; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 302 | u32 ba[WME_BA_BMP_SIZE >> 5]; |
Vasanthakumar Thiagarajan | 0934af2 | 2009-03-18 20:22:00 +0530 | [diff] [blame] | 303 | int isaggr, txfail, txpending, sendbar = 0, needreset = 0, nbad = 0; |
| 304 | bool rc_update = true; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 305 | |
Sujith | a22be22 | 2009-03-30 15:28:36 +0530 | [diff] [blame] | 306 | skb = bf->bf_mpdu; |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 307 | hdr = (struct ieee80211_hdr *)skb->data; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 308 | |
Luis R. Rodriguez | 76d5a9e | 2009-11-02 16:08:34 -0800 | [diff] [blame] | 309 | tx_info = IEEE80211_SKB_CB(skb); |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 310 | hw = bf->aphy->hw; |
Luis R. Rodriguez | 76d5a9e | 2009-11-02 16:08:34 -0800 | [diff] [blame] | 311 | |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 312 | rcu_read_lock(); |
| 313 | |
Johannes Berg | 5ed176e | 2009-11-04 14:42:28 +0100 | [diff] [blame] | 314 | /* XXX: use ieee80211_find_sta! */ |
Luis R. Rodriguez | 76d5a9e | 2009-11-02 16:08:34 -0800 | [diff] [blame] | 315 | sta = ieee80211_find_sta_by_hw(hw, hdr->addr1); |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 316 | if (!sta) { |
| 317 | rcu_read_unlock(); |
| 318 | return; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 319 | } |
| 320 | |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 321 | an = (struct ath_node *)sta->drv_priv; |
| 322 | tid = ATH_AN_2_TID(an, bf->bf_tidno); |
| 323 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 324 | isaggr = bf_isaggr(bf); |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 325 | memset(ba, 0, WME_BA_BMP_SIZE >> 3); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 326 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 327 | if (isaggr && txok) { |
| 328 | if (ATH_DS_TX_BA(ds)) { |
| 329 | seq_st = ATH_DS_BA_SEQ(ds); |
| 330 | memcpy(ba, ATH_DS_BA_BITMAP(ds), |
| 331 | WME_BA_BMP_SIZE >> 3); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 332 | } else { |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 333 | /* |
| 334 | * AR5416 can become deaf/mute when BA |
| 335 | * issue happens. Chip needs to be reset. |
| 336 | * But AP code may have sychronization issues |
| 337 | * when perform internal reset in this routine. |
| 338 | * Only enable reset in STA mode for now. |
| 339 | */ |
Sujith | 2660b81 | 2009-02-09 13:27:26 +0530 | [diff] [blame] | 340 | if (sc->sc_ah->opmode == NL80211_IFTYPE_STATION) |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 341 | needreset = 1; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 342 | } |
| 343 | } |
| 344 | |
| 345 | INIT_LIST_HEAD(&bf_pending); |
| 346 | INIT_LIST_HEAD(&bf_head); |
| 347 | |
Vasanthakumar Thiagarajan | 0934af2 | 2009-03-18 20:22:00 +0530 | [diff] [blame] | 348 | nbad = ath_tx_num_badfrms(sc, bf, txok); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 349 | while (bf) { |
| 350 | txfail = txpending = 0; |
| 351 | bf_next = bf->bf_next; |
| 352 | |
| 353 | if (ATH_BA_ISSET(ba, ATH_BA_INDEX(seq_st, bf->bf_seqno))) { |
| 354 | /* transmit completion, subframe is |
| 355 | * acked by block ack */ |
Vasanthakumar Thiagarajan | 0934af2 | 2009-03-18 20:22:00 +0530 | [diff] [blame] | 356 | acked_cnt++; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 357 | } else if (!isaggr && txok) { |
| 358 | /* transmit completion */ |
Vasanthakumar Thiagarajan | 0934af2 | 2009-03-18 20:22:00 +0530 | [diff] [blame] | 359 | acked_cnt++; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 360 | } else { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 361 | if (!(tid->state & AGGR_CLEANUP) && |
| 362 | ds->ds_txstat.ts_flags != ATH9K_TX_SW_ABORTED) { |
| 363 | if (bf->bf_retries < ATH_MAX_SW_RETRIES) { |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 364 | ath_tx_set_retry(sc, txq, bf); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 365 | txpending = 1; |
| 366 | } else { |
| 367 | bf->bf_state.bf_type |= BUF_XRETRY; |
| 368 | txfail = 1; |
| 369 | sendbar = 1; |
Vasanthakumar Thiagarajan | 0934af2 | 2009-03-18 20:22:00 +0530 | [diff] [blame] | 370 | txfail_cnt++; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 371 | } |
| 372 | } else { |
| 373 | /* |
| 374 | * cleanup in progress, just fail |
| 375 | * the un-acked sub-frames |
| 376 | */ |
| 377 | txfail = 1; |
| 378 | } |
| 379 | } |
| 380 | |
| 381 | if (bf_next == NULL) { |
Vasanthakumar Thiagarajan | cbfe89c | 2009-06-24 18:58:47 +0530 | [diff] [blame] | 382 | /* |
| 383 | * Make sure the last desc is reclaimed if it |
| 384 | * not a holding desc. |
| 385 | */ |
| 386 | if (!bf_last->bf_stale) |
| 387 | list_move_tail(&bf->list, &bf_head); |
| 388 | else |
| 389 | INIT_LIST_HEAD(&bf_head); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 390 | } else { |
Luis R. Rodriguez | 9680e8a | 2009-09-13 23:28:00 -0700 | [diff] [blame] | 391 | BUG_ON(list_empty(bf_q)); |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 392 | list_move_tail(&bf->list, &bf_head); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 393 | } |
| 394 | |
| 395 | if (!txpending) { |
| 396 | /* |
| 397 | * complete the acked-ones/xretried ones; update |
| 398 | * block-ack window |
| 399 | */ |
| 400 | spin_lock_bh(&txq->axq_lock); |
| 401 | ath_tx_update_baw(sc, tid, bf->bf_seqno); |
| 402 | spin_unlock_bh(&txq->axq_lock); |
| 403 | |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 404 | if (rc_update && (acked_cnt == 1 || txfail_cnt == 1)) { |
| 405 | ath_tx_rc_status(bf, ds, nbad, txok, true); |
| 406 | rc_update = false; |
| 407 | } else { |
| 408 | ath_tx_rc_status(bf, ds, nbad, txok, false); |
| 409 | } |
| 410 | |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 411 | ath_tx_complete_buf(sc, bf, txq, &bf_head, !txfail, sendbar); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 412 | } else { |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 413 | /* retry the un-acked ones */ |
Sujith | a119cc4 | 2009-03-30 15:28:38 +0530 | [diff] [blame] | 414 | if (bf->bf_next == NULL && bf_last->bf_stale) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 415 | struct ath_buf *tbf; |
| 416 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 417 | tbf = ath_clone_txbuf(sc, bf_last); |
Vasanthakumar Thiagarajan | c41d92d | 2009-07-14 20:17:11 -0400 | [diff] [blame] | 418 | /* |
| 419 | * Update tx baw and complete the frame with |
| 420 | * failed status if we run out of tx buf |
| 421 | */ |
| 422 | if (!tbf) { |
| 423 | spin_lock_bh(&txq->axq_lock); |
| 424 | ath_tx_update_baw(sc, tid, |
| 425 | bf->bf_seqno); |
| 426 | spin_unlock_bh(&txq->axq_lock); |
| 427 | |
| 428 | bf->bf_state.bf_type |= BUF_XRETRY; |
| 429 | ath_tx_rc_status(bf, ds, nbad, |
| 430 | 0, false); |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 431 | ath_tx_complete_buf(sc, bf, txq, |
| 432 | &bf_head, 0, 0); |
Vasanthakumar Thiagarajan | 8a46097 | 2009-06-10 17:50:09 +0530 | [diff] [blame] | 433 | break; |
Vasanthakumar Thiagarajan | c41d92d | 2009-07-14 20:17:11 -0400 | [diff] [blame] | 434 | } |
| 435 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 436 | ath9k_hw_cleartxdesc(sc->sc_ah, tbf->bf_desc); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 437 | list_add_tail(&tbf->list, &bf_head); |
| 438 | } else { |
| 439 | /* |
| 440 | * Clear descriptor status words for |
| 441 | * software retry |
| 442 | */ |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 443 | ath9k_hw_cleartxdesc(sc->sc_ah, bf->bf_desc); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 444 | } |
| 445 | |
| 446 | /* |
| 447 | * Put this buffer to the temporary pending |
| 448 | * queue to retain ordering |
| 449 | */ |
| 450 | list_splice_tail_init(&bf_head, &bf_pending); |
| 451 | } |
| 452 | |
| 453 | bf = bf_next; |
| 454 | } |
| 455 | |
| 456 | if (tid->state & AGGR_CLEANUP) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 457 | if (tid->baw_head == tid->baw_tail) { |
| 458 | tid->state &= ~AGGR_ADDBA_COMPLETE; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 459 | tid->state &= ~AGGR_CLEANUP; |
| 460 | |
| 461 | /* send buffered frames as singles */ |
| 462 | ath_tx_flush_tid(sc, tid); |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 463 | } |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 464 | rcu_read_unlock(); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 465 | return; |
| 466 | } |
| 467 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 468 | /* prepend un-acked frames to the beginning of the pending frame queue */ |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 469 | if (!list_empty(&bf_pending)) { |
| 470 | spin_lock_bh(&txq->axq_lock); |
| 471 | list_splice(&bf_pending, &tid->buf_q); |
| 472 | ath_tx_queue_tid(txq, tid); |
| 473 | spin_unlock_bh(&txq->axq_lock); |
| 474 | } |
| 475 | |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 476 | rcu_read_unlock(); |
| 477 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 478 | if (needreset) |
| 479 | ath_reset(sc, false); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 480 | } |
| 481 | |
| 482 | static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf, |
| 483 | struct ath_atx_tid *tid) |
| 484 | { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 485 | struct sk_buff *skb; |
| 486 | struct ieee80211_tx_info *tx_info; |
| 487 | struct ieee80211_tx_rate *rates; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 488 | u32 max_4ms_framelen, frmlen; |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 489 | u16 aggr_limit, legacy = 0; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 490 | int i; |
| 491 | |
Sujith | a22be22 | 2009-03-30 15:28:36 +0530 | [diff] [blame] | 492 | skb = bf->bf_mpdu; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 493 | tx_info = IEEE80211_SKB_CB(skb); |
| 494 | rates = tx_info->control.rates; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 495 | |
| 496 | /* |
| 497 | * Find the lowest frame length among the rate series that will have a |
| 498 | * 4ms transmit duration. |
| 499 | * TODO - TXOP limit needs to be considered. |
| 500 | */ |
| 501 | max_4ms_framelen = ATH_AMPDU_LIMIT_MAX; |
| 502 | |
| 503 | for (i = 0; i < 4; i++) { |
| 504 | if (rates[i].count) { |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 505 | int modeidx; |
| 506 | if (!(rates[i].flags & IEEE80211_TX_RC_MCS)) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 507 | legacy = 1; |
| 508 | break; |
| 509 | } |
| 510 | |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 511 | if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI) |
| 512 | modeidx = MCS_HT40_SGI; |
| 513 | else if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) |
| 514 | modeidx = MCS_HT40; |
| 515 | else |
| 516 | modeidx = MCS_DEFAULT; |
| 517 | |
| 518 | frmlen = ath_max_4ms_framelen[modeidx][rates[i].idx]; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 519 | max_4ms_framelen = min(max_4ms_framelen, frmlen); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 520 | } |
| 521 | } |
| 522 | |
| 523 | /* |
| 524 | * limit aggregate size by the minimum rate if rate selected is |
| 525 | * not a probe rate, if rate selected is a probe rate then |
| 526 | * avoid aggregation of this packet. |
| 527 | */ |
| 528 | if (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE || legacy) |
| 529 | return 0; |
| 530 | |
Vasanthakumar Thiagarajan | 1773912 | 2009-08-26 21:08:50 +0530 | [diff] [blame] | 531 | if (sc->sc_flags & SC_OP_BT_PRIORITY_DETECTED) |
| 532 | aggr_limit = min((max_4ms_framelen * 3) / 8, |
| 533 | (u32)ATH_AMPDU_LIMIT_MAX); |
| 534 | else |
| 535 | aggr_limit = min(max_4ms_framelen, |
| 536 | (u32)ATH_AMPDU_LIMIT_MAX); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 537 | |
| 538 | /* |
| 539 | * h/w can accept aggregates upto 16 bit lengths (65535). |
| 540 | * The IE, however can hold upto 65536, which shows up here |
| 541 | * as zero. Ignore 65536 since we are constrained by hw. |
| 542 | */ |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 543 | if (tid->an->maxampdu) |
| 544 | aggr_limit = min(aggr_limit, tid->an->maxampdu); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 545 | |
| 546 | return aggr_limit; |
| 547 | } |
| 548 | |
| 549 | /* |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 550 | * Returns the number of delimiters to be added to |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 551 | * meet the minimum required mpdudensity. |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 552 | */ |
| 553 | static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid, |
| 554 | struct ath_buf *bf, u16 frmlen) |
| 555 | { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 556 | struct sk_buff *skb = bf->bf_mpdu; |
| 557 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 558 | u32 nsymbits, nsymbols; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 559 | u16 minlen; |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 560 | u8 flags, rix; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 561 | int width, half_gi, ndelim, mindelim; |
| 562 | |
| 563 | /* Select standard number of delimiters based on frame length alone */ |
| 564 | ndelim = ATH_AGGR_GET_NDELIM(frmlen); |
| 565 | |
| 566 | /* |
| 567 | * If encryption enabled, hardware requires some more padding between |
| 568 | * subframes. |
| 569 | * TODO - this could be improved to be dependent on the rate. |
| 570 | * The hardware can keep up at lower rates, but not higher rates |
| 571 | */ |
| 572 | if (bf->bf_keytype != ATH9K_KEY_TYPE_CLEAR) |
| 573 | ndelim += ATH_AGGR_ENCRYPTDELIM; |
| 574 | |
| 575 | /* |
| 576 | * Convert desired mpdu density from microeconds to bytes based |
| 577 | * on highest rate in rate series (i.e. first rate) to determine |
| 578 | * required minimum length for subframe. Take into account |
| 579 | * whether high rate is 20 or 40Mhz and half or full GI. |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 580 | * |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 581 | * If there is no mpdu density restriction, no further calculation |
| 582 | * is needed. |
| 583 | */ |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 584 | |
| 585 | if (tid->an->mpdudensity == 0) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 586 | return ndelim; |
| 587 | |
| 588 | rix = tx_info->control.rates[0].idx; |
| 589 | flags = tx_info->control.rates[0].flags; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 590 | width = (flags & IEEE80211_TX_RC_40_MHZ_WIDTH) ? 1 : 0; |
| 591 | half_gi = (flags & IEEE80211_TX_RC_SHORT_GI) ? 1 : 0; |
| 592 | |
| 593 | if (half_gi) |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 594 | nsymbols = NUM_SYMBOLS_PER_USEC_HALFGI(tid->an->mpdudensity); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 595 | else |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 596 | nsymbols = NUM_SYMBOLS_PER_USEC(tid->an->mpdudensity); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 597 | |
| 598 | if (nsymbols == 0) |
| 599 | nsymbols = 1; |
| 600 | |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 601 | nsymbits = bits_per_symbol[rix][width]; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 602 | minlen = (nsymbols * nsymbits) / BITS_PER_BYTE; |
| 603 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 604 | if (frmlen < minlen) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 605 | mindelim = (minlen - frmlen) / ATH_AGGR_DELIM_SZ; |
| 606 | ndelim = max(mindelim, ndelim); |
| 607 | } |
| 608 | |
| 609 | return ndelim; |
| 610 | } |
| 611 | |
| 612 | static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc, |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 613 | struct ath_txq *txq, |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 614 | struct ath_atx_tid *tid, |
| 615 | struct list_head *bf_q) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 616 | { |
| 617 | #define PADBYTES(_len) ((4 - ((_len) % 4)) % 4) |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 618 | struct ath_buf *bf, *bf_first, *bf_prev = NULL; |
| 619 | int rl = 0, nframes = 0, ndelim, prev_al = 0; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 620 | u16 aggr_limit = 0, al = 0, bpad = 0, |
| 621 | al_delta, h_baw = tid->baw_size / 2; |
| 622 | enum ATH_AGGR_STATUS status = ATH_AGGR_DONE; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 623 | |
| 624 | bf_first = list_first_entry(&tid->buf_q, struct ath_buf, list); |
| 625 | |
| 626 | do { |
| 627 | bf = list_first_entry(&tid->buf_q, struct ath_buf, list); |
| 628 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 629 | /* do not step over block-ack window */ |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 630 | if (!BAW_WITHIN(tid->seq_start, tid->baw_size, bf->bf_seqno)) { |
| 631 | status = ATH_AGGR_BAW_CLOSED; |
| 632 | break; |
| 633 | } |
| 634 | |
| 635 | if (!rl) { |
| 636 | aggr_limit = ath_lookup_rate(sc, bf, tid); |
| 637 | rl = 1; |
| 638 | } |
| 639 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 640 | /* do not exceed aggregation limit */ |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 641 | al_delta = ATH_AGGR_DELIM_SZ + bf->bf_frmlen; |
| 642 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 643 | if (nframes && |
| 644 | (aggr_limit < (al + bpad + al_delta + prev_al))) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 645 | status = ATH_AGGR_LIMITED; |
| 646 | break; |
| 647 | } |
| 648 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 649 | /* do not exceed subframe limit */ |
| 650 | if (nframes >= min((int)h_baw, ATH_AMPDU_SUBFRAME_DEFAULT)) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 651 | status = ATH_AGGR_LIMITED; |
| 652 | break; |
| 653 | } |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 654 | nframes++; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 655 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 656 | /* add padding for previous frame to aggregation length */ |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 657 | al += bpad + al_delta; |
| 658 | |
| 659 | /* |
| 660 | * Get the delimiters needed to meet the MPDU |
| 661 | * density for this node. |
| 662 | */ |
| 663 | ndelim = ath_compute_num_delims(sc, tid, bf_first, bf->bf_frmlen); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 664 | bpad = PADBYTES(al_delta) + (ndelim << 2); |
| 665 | |
| 666 | bf->bf_next = NULL; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 667 | bf->bf_desc->ds_link = 0; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 668 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 669 | /* link buffers of this frame to the aggregate */ |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 670 | ath_tx_addto_baw(sc, tid, bf); |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 671 | ath9k_hw_set11n_aggr_middle(sc->sc_ah, bf->bf_desc, ndelim); |
| 672 | list_move_tail(&bf->list, bf_q); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 673 | if (bf_prev) { |
| 674 | bf_prev->bf_next = bf; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 675 | bf_prev->bf_desc->ds_link = bf->bf_daddr; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 676 | } |
| 677 | bf_prev = bf; |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 678 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 679 | } while (!list_empty(&tid->buf_q)); |
| 680 | |
| 681 | bf_first->bf_al = al; |
| 682 | bf_first->bf_nframes = nframes; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 683 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 684 | return status; |
| 685 | #undef PADBYTES |
| 686 | } |
| 687 | |
| 688 | static void ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq, |
| 689 | struct ath_atx_tid *tid) |
| 690 | { |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 691 | struct ath_buf *bf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 692 | enum ATH_AGGR_STATUS status; |
| 693 | struct list_head bf_q; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 694 | |
| 695 | do { |
| 696 | if (list_empty(&tid->buf_q)) |
| 697 | return; |
| 698 | |
| 699 | INIT_LIST_HEAD(&bf_q); |
| 700 | |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 701 | status = ath_tx_form_aggr(sc, txq, tid, &bf_q); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 702 | |
| 703 | /* |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 704 | * no frames picked up to be aggregated; |
| 705 | * block-ack window is not open. |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 706 | */ |
| 707 | if (list_empty(&bf_q)) |
| 708 | break; |
| 709 | |
| 710 | bf = list_first_entry(&bf_q, struct ath_buf, list); |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 711 | bf->bf_lastbf = list_entry(bf_q.prev, struct ath_buf, list); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 712 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 713 | /* if only one frame, send as non-aggregate */ |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 714 | if (bf->bf_nframes == 1) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 715 | bf->bf_state.bf_type &= ~BUF_AGGR; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 716 | ath9k_hw_clr11n_aggr(sc->sc_ah, bf->bf_desc); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 717 | ath_buf_set_rate(sc, bf); |
| 718 | ath_tx_txqaddbuf(sc, txq, &bf_q); |
| 719 | continue; |
| 720 | } |
| 721 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 722 | /* setup first desc of aggregate */ |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 723 | bf->bf_state.bf_type |= BUF_AGGR; |
| 724 | ath_buf_set_rate(sc, bf); |
| 725 | ath9k_hw_set11n_aggr_first(sc->sc_ah, bf->bf_desc, bf->bf_al); |
| 726 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 727 | /* anchor last desc of aggregate */ |
| 728 | ath9k_hw_set11n_aggr_last(sc->sc_ah, bf->bf_lastbf->bf_desc); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 729 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 730 | ath_tx_txqaddbuf(sc, txq, &bf_q); |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 731 | TX_STAT_INC(txq->axq_qnum, a_aggr); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 732 | |
| 733 | } while (txq->axq_depth < ATH_AGGR_MIN_QDEPTH && |
| 734 | status != ATH_AGGR_BAW_CLOSED); |
| 735 | } |
| 736 | |
Sujith | f83da96 | 2009-07-23 15:32:37 +0530 | [diff] [blame] | 737 | void ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta, |
| 738 | u16 tid, u16 *ssn) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 739 | { |
| 740 | struct ath_atx_tid *txtid; |
| 741 | struct ath_node *an; |
| 742 | |
| 743 | an = (struct ath_node *)sta->drv_priv; |
Sujith | f83da96 | 2009-07-23 15:32:37 +0530 | [diff] [blame] | 744 | txtid = ATH_AN_2_TID(an, tid); |
| 745 | txtid->state |= AGGR_ADDBA_PROGRESS; |
| 746 | ath_tx_pause_tid(sc, txtid); |
| 747 | *ssn = txtid->seq_start; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 748 | } |
| 749 | |
Sujith | f83da96 | 2009-07-23 15:32:37 +0530 | [diff] [blame] | 750 | 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] | 751 | { |
| 752 | struct ath_node *an = (struct ath_node *)sta->drv_priv; |
| 753 | struct ath_atx_tid *txtid = ATH_AN_2_TID(an, tid); |
| 754 | struct ath_txq *txq = &sc->tx.txq[txtid->ac->qnum]; |
| 755 | struct ath_buf *bf; |
| 756 | struct list_head bf_head; |
| 757 | INIT_LIST_HEAD(&bf_head); |
| 758 | |
| 759 | if (txtid->state & AGGR_CLEANUP) |
Sujith | f83da96 | 2009-07-23 15:32:37 +0530 | [diff] [blame] | 760 | return; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 761 | |
| 762 | if (!(txtid->state & AGGR_ADDBA_COMPLETE)) { |
Vasanthakumar Thiagarajan | 5eae659 | 2009-06-09 15:28:21 +0530 | [diff] [blame] | 763 | txtid->state &= ~AGGR_ADDBA_PROGRESS; |
Sujith | f83da96 | 2009-07-23 15:32:37 +0530 | [diff] [blame] | 764 | return; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 765 | } |
| 766 | |
| 767 | ath_tx_pause_tid(sc, txtid); |
| 768 | |
| 769 | /* drop all software retried frames and mark this TID */ |
| 770 | spin_lock_bh(&txq->axq_lock); |
| 771 | while (!list_empty(&txtid->buf_q)) { |
| 772 | bf = list_first_entry(&txtid->buf_q, struct ath_buf, list); |
| 773 | if (!bf_isretried(bf)) { |
| 774 | /* |
| 775 | * NB: it's based on the assumption that |
| 776 | * software retried frame will always stay |
| 777 | * at the head of software queue. |
| 778 | */ |
| 779 | break; |
| 780 | } |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 781 | list_move_tail(&bf->list, &bf_head); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 782 | ath_tx_update_baw(sc, txtid, bf->bf_seqno); |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 783 | ath_tx_complete_buf(sc, bf, txq, &bf_head, 0, 0); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 784 | } |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 785 | spin_unlock_bh(&txq->axq_lock); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 786 | |
| 787 | if (txtid->baw_head != txtid->baw_tail) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 788 | txtid->state |= AGGR_CLEANUP; |
| 789 | } else { |
| 790 | txtid->state &= ~AGGR_ADDBA_COMPLETE; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 791 | ath_tx_flush_tid(sc, txtid); |
| 792 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 793 | } |
| 794 | |
| 795 | void ath_tx_aggr_resume(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid) |
| 796 | { |
| 797 | struct ath_atx_tid *txtid; |
| 798 | struct ath_node *an; |
| 799 | |
| 800 | an = (struct ath_node *)sta->drv_priv; |
| 801 | |
| 802 | if (sc->sc_flags & SC_OP_TXAGGR) { |
| 803 | txtid = ATH_AN_2_TID(an, tid); |
| 804 | txtid->baw_size = |
| 805 | IEEE80211_MIN_AMPDU_BUF << sta->ht_cap.ampdu_factor; |
| 806 | txtid->state |= AGGR_ADDBA_COMPLETE; |
| 807 | txtid->state &= ~AGGR_ADDBA_PROGRESS; |
| 808 | ath_tx_resume_tid(sc, txtid); |
| 809 | } |
| 810 | } |
| 811 | |
| 812 | bool ath_tx_aggr_check(struct ath_softc *sc, struct ath_node *an, u8 tidno) |
| 813 | { |
| 814 | struct ath_atx_tid *txtid; |
| 815 | |
| 816 | if (!(sc->sc_flags & SC_OP_TXAGGR)) |
| 817 | return false; |
| 818 | |
| 819 | txtid = ATH_AN_2_TID(an, tidno); |
| 820 | |
Vasanthakumar Thiagarajan | c3d8f02 | 2009-06-10 17:50:08 +0530 | [diff] [blame] | 821 | if (!(txtid->state & (AGGR_ADDBA_COMPLETE | AGGR_ADDBA_PROGRESS))) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 822 | return true; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 823 | return false; |
| 824 | } |
| 825 | |
| 826 | /********************/ |
| 827 | /* Queue Management */ |
| 828 | /********************/ |
| 829 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 830 | static void ath_txq_drain_pending_buffers(struct ath_softc *sc, |
| 831 | struct ath_txq *txq) |
| 832 | { |
| 833 | struct ath_atx_ac *ac, *ac_tmp; |
| 834 | struct ath_atx_tid *tid, *tid_tmp; |
| 835 | |
| 836 | list_for_each_entry_safe(ac, ac_tmp, &txq->axq_acq, list) { |
| 837 | list_del(&ac->list); |
| 838 | ac->sched = false; |
| 839 | list_for_each_entry_safe(tid, tid_tmp, &ac->tid_q, list) { |
| 840 | list_del(&tid->list); |
| 841 | tid->sched = false; |
| 842 | ath_tid_drain(sc, txq, tid); |
| 843 | } |
| 844 | } |
| 845 | } |
| 846 | |
| 847 | struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype) |
| 848 | { |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 849 | struct ath_hw *ah = sc->sc_ah; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 850 | struct ath_common *common = ath9k_hw_common(ah); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 851 | struct ath9k_tx_queue_info qi; |
| 852 | int qnum; |
| 853 | |
| 854 | memset(&qi, 0, sizeof(qi)); |
| 855 | qi.tqi_subtype = subtype; |
| 856 | qi.tqi_aifs = ATH9K_TXQ_USEDEFAULT; |
| 857 | qi.tqi_cwmin = ATH9K_TXQ_USEDEFAULT; |
| 858 | qi.tqi_cwmax = ATH9K_TXQ_USEDEFAULT; |
| 859 | qi.tqi_physCompBuf = 0; |
| 860 | |
| 861 | /* |
| 862 | * Enable interrupts only for EOL and DESC conditions. |
| 863 | * We mark tx descriptors to receive a DESC interrupt |
| 864 | * when a tx queue gets deep; otherwise waiting for the |
| 865 | * EOL to reap descriptors. Note that this is done to |
| 866 | * reduce interrupt load and this only defers reaping |
| 867 | * descriptors, never transmitting frames. Aside from |
| 868 | * reducing interrupts this also permits more concurrency. |
| 869 | * The only potential downside is if the tx queue backs |
| 870 | * up in which case the top half of the kernel may backup |
| 871 | * due to a lack of tx descriptors. |
| 872 | * |
| 873 | * The UAPSD queue is an exception, since we take a desc- |
| 874 | * based intr on the EOSP frames. |
| 875 | */ |
| 876 | if (qtype == ATH9K_TX_QUEUE_UAPSD) |
| 877 | qi.tqi_qflags = TXQ_FLAG_TXDESCINT_ENABLE; |
| 878 | else |
| 879 | qi.tqi_qflags = TXQ_FLAG_TXEOLINT_ENABLE | |
| 880 | TXQ_FLAG_TXDESCINT_ENABLE; |
| 881 | qnum = ath9k_hw_setuptxqueue(ah, qtype, &qi); |
| 882 | if (qnum == -1) { |
| 883 | /* |
| 884 | * NB: don't print a message, this happens |
| 885 | * normally on parts with too few tx queues |
| 886 | */ |
| 887 | return NULL; |
| 888 | } |
| 889 | if (qnum >= ARRAY_SIZE(sc->tx.txq)) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 890 | ath_print(common, ATH_DBG_FATAL, |
| 891 | "qnum %u out of range, max %u!\n", |
| 892 | qnum, (unsigned int)ARRAY_SIZE(sc->tx.txq)); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 893 | ath9k_hw_releasetxqueue(ah, qnum); |
| 894 | return NULL; |
| 895 | } |
| 896 | if (!ATH_TXQ_SETUP(sc, qnum)) { |
| 897 | struct ath_txq *txq = &sc->tx.txq[qnum]; |
| 898 | |
| 899 | txq->axq_qnum = qnum; |
| 900 | txq->axq_link = NULL; |
| 901 | INIT_LIST_HEAD(&txq->axq_q); |
| 902 | INIT_LIST_HEAD(&txq->axq_acq); |
| 903 | spin_lock_init(&txq->axq_lock); |
| 904 | txq->axq_depth = 0; |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 905 | txq->axq_tx_inprogress = false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 906 | sc->tx.txqsetup |= 1<<qnum; |
| 907 | } |
| 908 | return &sc->tx.txq[qnum]; |
| 909 | } |
| 910 | |
Vasanthakumar Thiagarajan | 1773912 | 2009-08-26 21:08:50 +0530 | [diff] [blame] | 911 | int ath_tx_get_qnum(struct ath_softc *sc, int qtype, int haltype) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 912 | { |
| 913 | int qnum; |
| 914 | |
| 915 | switch (qtype) { |
| 916 | case ATH9K_TX_QUEUE_DATA: |
| 917 | if (haltype >= ARRAY_SIZE(sc->tx.hwq_map)) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 918 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL, |
| 919 | "HAL AC %u out of range, max %zu!\n", |
| 920 | haltype, ARRAY_SIZE(sc->tx.hwq_map)); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 921 | return -1; |
| 922 | } |
| 923 | qnum = sc->tx.hwq_map[haltype]; |
| 924 | break; |
| 925 | case ATH9K_TX_QUEUE_BEACON: |
| 926 | qnum = sc->beacon.beaconq; |
| 927 | break; |
| 928 | case ATH9K_TX_QUEUE_CAB: |
| 929 | qnum = sc->beacon.cabq->axq_qnum; |
| 930 | break; |
| 931 | default: |
| 932 | qnum = -1; |
| 933 | } |
| 934 | return qnum; |
| 935 | } |
| 936 | |
| 937 | struct ath_txq *ath_test_get_txq(struct ath_softc *sc, struct sk_buff *skb) |
| 938 | { |
| 939 | struct ath_txq *txq = NULL; |
Luis R. Rodriguez | f52de03 | 2009-11-02 17:09:12 -0800 | [diff] [blame] | 940 | u16 skb_queue = skb_get_queue_mapping(skb); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 941 | int qnum; |
| 942 | |
Luis R. Rodriguez | f52de03 | 2009-11-02 17:09:12 -0800 | [diff] [blame] | 943 | qnum = ath_get_hal_qnum(skb_queue, sc); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 944 | txq = &sc->tx.txq[qnum]; |
| 945 | |
| 946 | spin_lock_bh(&txq->axq_lock); |
| 947 | |
| 948 | if (txq->axq_depth >= (ATH_TXBUF - 20)) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 949 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_XMIT, |
| 950 | "TX queue: %d is full, depth: %d\n", |
| 951 | qnum, txq->axq_depth); |
Luis R. Rodriguez | f52de03 | 2009-11-02 17:09:12 -0800 | [diff] [blame] | 952 | ath_mac80211_stop_queue(sc, skb_queue); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 953 | txq->stopped = 1; |
| 954 | spin_unlock_bh(&txq->axq_lock); |
| 955 | return NULL; |
| 956 | } |
| 957 | |
| 958 | spin_unlock_bh(&txq->axq_lock); |
| 959 | |
| 960 | return txq; |
| 961 | } |
| 962 | |
| 963 | int ath_txq_update(struct ath_softc *sc, int qnum, |
| 964 | struct ath9k_tx_queue_info *qinfo) |
| 965 | { |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 966 | struct ath_hw *ah = sc->sc_ah; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 967 | int error = 0; |
| 968 | struct ath9k_tx_queue_info qi; |
| 969 | |
| 970 | if (qnum == sc->beacon.beaconq) { |
| 971 | /* |
| 972 | * XXX: for beacon queue, we just save the parameter. |
| 973 | * It will be picked up by ath_beaconq_config when |
| 974 | * it's necessary. |
| 975 | */ |
| 976 | sc->beacon.beacon_qi = *qinfo; |
| 977 | return 0; |
| 978 | } |
| 979 | |
Luis R. Rodriguez | 9680e8a | 2009-09-13 23:28:00 -0700 | [diff] [blame] | 980 | BUG_ON(sc->tx.txq[qnum].axq_qnum != qnum); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 981 | |
| 982 | ath9k_hw_get_txq_props(ah, qnum, &qi); |
| 983 | qi.tqi_aifs = qinfo->tqi_aifs; |
| 984 | qi.tqi_cwmin = qinfo->tqi_cwmin; |
| 985 | qi.tqi_cwmax = qinfo->tqi_cwmax; |
| 986 | qi.tqi_burstTime = qinfo->tqi_burstTime; |
| 987 | qi.tqi_readyTime = qinfo->tqi_readyTime; |
| 988 | |
| 989 | if (!ath9k_hw_set_txq_props(ah, qnum, &qi)) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 990 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL, |
| 991 | "Unable to update hardware queue %u!\n", qnum); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 992 | error = -EIO; |
| 993 | } else { |
| 994 | ath9k_hw_resettxqueue(ah, qnum); |
| 995 | } |
| 996 | |
| 997 | return error; |
| 998 | } |
| 999 | |
| 1000 | int ath_cabq_update(struct ath_softc *sc) |
| 1001 | { |
| 1002 | struct ath9k_tx_queue_info qi; |
| 1003 | int qnum = sc->beacon.cabq->axq_qnum; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1004 | |
| 1005 | ath9k_hw_get_txq_props(sc->sc_ah, qnum, &qi); |
| 1006 | /* |
| 1007 | * Ensure the readytime % is within the bounds. |
| 1008 | */ |
Sujith | 17d7904 | 2009-02-09 13:27:03 +0530 | [diff] [blame] | 1009 | if (sc->config.cabqReadytime < ATH9K_READY_TIME_LO_BOUND) |
| 1010 | sc->config.cabqReadytime = ATH9K_READY_TIME_LO_BOUND; |
| 1011 | else if (sc->config.cabqReadytime > ATH9K_READY_TIME_HI_BOUND) |
| 1012 | sc->config.cabqReadytime = ATH9K_READY_TIME_HI_BOUND; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1013 | |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 1014 | qi.tqi_readyTime = (sc->beacon_interval * |
Sujith | fdbf733 | 2009-02-17 15:36:35 +0530 | [diff] [blame] | 1015 | sc->config.cabqReadytime) / 100; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1016 | ath_txq_update(sc, qnum, &qi); |
| 1017 | |
| 1018 | return 0; |
| 1019 | } |
| 1020 | |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1021 | /* |
| 1022 | * Drain a given TX queue (could be Beacon or Data) |
| 1023 | * |
| 1024 | * This assumes output has been stopped and |
| 1025 | * we do not need to block ath_tx_tasklet. |
| 1026 | */ |
| 1027 | void ath_draintxq(struct ath_softc *sc, struct ath_txq *txq, bool retry_tx) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1028 | { |
| 1029 | struct ath_buf *bf, *lastbf; |
| 1030 | struct list_head bf_head; |
| 1031 | |
| 1032 | INIT_LIST_HEAD(&bf_head); |
| 1033 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1034 | for (;;) { |
| 1035 | spin_lock_bh(&txq->axq_lock); |
| 1036 | |
| 1037 | if (list_empty(&txq->axq_q)) { |
| 1038 | txq->axq_link = NULL; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1039 | spin_unlock_bh(&txq->axq_lock); |
| 1040 | break; |
| 1041 | } |
| 1042 | |
| 1043 | bf = list_first_entry(&txq->axq_q, struct ath_buf, list); |
| 1044 | |
Sujith | a119cc4 | 2009-03-30 15:28:38 +0530 | [diff] [blame] | 1045 | if (bf->bf_stale) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1046 | list_del(&bf->list); |
| 1047 | spin_unlock_bh(&txq->axq_lock); |
| 1048 | |
| 1049 | spin_lock_bh(&sc->tx.txbuflock); |
| 1050 | list_add_tail(&bf->list, &sc->tx.txbuf); |
| 1051 | spin_unlock_bh(&sc->tx.txbuflock); |
| 1052 | continue; |
| 1053 | } |
| 1054 | |
| 1055 | lastbf = bf->bf_lastbf; |
| 1056 | if (!retry_tx) |
| 1057 | lastbf->bf_desc->ds_txstat.ts_flags = |
| 1058 | ATH9K_TX_SW_ABORTED; |
| 1059 | |
| 1060 | /* remove ath_buf's of the same mpdu from txq */ |
| 1061 | list_cut_position(&bf_head, &txq->axq_q, &lastbf->list); |
| 1062 | txq->axq_depth--; |
| 1063 | |
| 1064 | spin_unlock_bh(&txq->axq_lock); |
| 1065 | |
| 1066 | if (bf_isampdu(bf)) |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 1067 | ath_tx_complete_aggr(sc, txq, bf, &bf_head, 0); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1068 | else |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 1069 | ath_tx_complete_buf(sc, bf, txq, &bf_head, 0, 0); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1070 | } |
| 1071 | |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 1072 | spin_lock_bh(&txq->axq_lock); |
| 1073 | txq->axq_tx_inprogress = false; |
| 1074 | spin_unlock_bh(&txq->axq_lock); |
| 1075 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1076 | /* flush any pending frames if aggregation is enabled */ |
| 1077 | if (sc->sc_flags & SC_OP_TXAGGR) { |
| 1078 | if (!retry_tx) { |
| 1079 | spin_lock_bh(&txq->axq_lock); |
| 1080 | ath_txq_drain_pending_buffers(sc, txq); |
| 1081 | spin_unlock_bh(&txq->axq_lock); |
| 1082 | } |
| 1083 | } |
| 1084 | } |
| 1085 | |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1086 | void ath_drain_all_txq(struct ath_softc *sc, bool retry_tx) |
| 1087 | { |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 1088 | struct ath_hw *ah = sc->sc_ah; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1089 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1090 | struct ath_txq *txq; |
| 1091 | int i, npend = 0; |
| 1092 | |
| 1093 | if (sc->sc_flags & SC_OP_INVALID) |
| 1094 | return; |
| 1095 | |
| 1096 | /* Stop beacon queue */ |
| 1097 | ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq); |
| 1098 | |
| 1099 | /* Stop data queues */ |
| 1100 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { |
| 1101 | if (ATH_TXQ_SETUP(sc, i)) { |
| 1102 | txq = &sc->tx.txq[i]; |
| 1103 | ath9k_hw_stoptxdma(ah, txq->axq_qnum); |
| 1104 | npend += ath9k_hw_numtxpending(ah, txq->axq_qnum); |
| 1105 | } |
| 1106 | } |
| 1107 | |
| 1108 | if (npend) { |
| 1109 | int r; |
| 1110 | |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1111 | ath_print(common, ATH_DBG_XMIT, |
| 1112 | "Unable to stop TxDMA. Reset HAL!\n"); |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1113 | |
| 1114 | spin_lock_bh(&sc->sc_resetlock); |
Sujith | 2660b81 | 2009-02-09 13:27:26 +0530 | [diff] [blame] | 1115 | r = ath9k_hw_reset(ah, sc->sc_ah->curchan, true); |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1116 | if (r) |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1117 | ath_print(common, ATH_DBG_FATAL, |
| 1118 | "Unable to reset hardware; reset status %d\n", |
| 1119 | r); |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1120 | spin_unlock_bh(&sc->sc_resetlock); |
| 1121 | } |
| 1122 | |
| 1123 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { |
| 1124 | if (ATH_TXQ_SETUP(sc, i)) |
| 1125 | ath_draintxq(sc, &sc->tx.txq[i], retry_tx); |
| 1126 | } |
| 1127 | } |
| 1128 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1129 | void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq) |
| 1130 | { |
| 1131 | ath9k_hw_releasetxqueue(sc->sc_ah, txq->axq_qnum); |
| 1132 | sc->tx.txqsetup &= ~(1<<txq->axq_qnum); |
| 1133 | } |
| 1134 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1135 | void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq) |
| 1136 | { |
| 1137 | struct ath_atx_ac *ac; |
| 1138 | struct ath_atx_tid *tid; |
| 1139 | |
| 1140 | if (list_empty(&txq->axq_acq)) |
| 1141 | return; |
| 1142 | |
| 1143 | ac = list_first_entry(&txq->axq_acq, struct ath_atx_ac, list); |
| 1144 | list_del(&ac->list); |
| 1145 | ac->sched = false; |
| 1146 | |
| 1147 | do { |
| 1148 | if (list_empty(&ac->tid_q)) |
| 1149 | return; |
| 1150 | |
| 1151 | tid = list_first_entry(&ac->tid_q, struct ath_atx_tid, list); |
| 1152 | list_del(&tid->list); |
| 1153 | tid->sched = false; |
| 1154 | |
| 1155 | if (tid->paused) |
| 1156 | continue; |
| 1157 | |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 1158 | ath_tx_sched_aggr(sc, txq, tid); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1159 | |
| 1160 | /* |
| 1161 | * add tid to round-robin queue if more frames |
| 1162 | * are pending for the tid |
| 1163 | */ |
| 1164 | if (!list_empty(&tid->buf_q)) |
| 1165 | ath_tx_queue_tid(txq, tid); |
| 1166 | |
| 1167 | break; |
| 1168 | } while (!list_empty(&ac->tid_q)); |
| 1169 | |
| 1170 | if (!list_empty(&ac->tid_q)) { |
| 1171 | if (!ac->sched) { |
| 1172 | ac->sched = true; |
| 1173 | list_add_tail(&ac->list, &txq->axq_acq); |
| 1174 | } |
| 1175 | } |
| 1176 | } |
| 1177 | |
| 1178 | int ath_tx_setup(struct ath_softc *sc, int haltype) |
| 1179 | { |
| 1180 | struct ath_txq *txq; |
| 1181 | |
| 1182 | if (haltype >= ARRAY_SIZE(sc->tx.hwq_map)) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1183 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL, |
| 1184 | "HAL AC %u out of range, max %zu!\n", |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1185 | haltype, ARRAY_SIZE(sc->tx.hwq_map)); |
| 1186 | return 0; |
| 1187 | } |
| 1188 | txq = ath_txq_setup(sc, ATH9K_TX_QUEUE_DATA, haltype); |
| 1189 | if (txq != NULL) { |
| 1190 | sc->tx.hwq_map[haltype] = txq->axq_qnum; |
| 1191 | return 1; |
| 1192 | } else |
| 1193 | return 0; |
| 1194 | } |
| 1195 | |
| 1196 | /***********/ |
| 1197 | /* TX, DMA */ |
| 1198 | /***********/ |
| 1199 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1200 | /* |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1201 | * Insert a chain of ath_buf (descriptors) on a txq and |
| 1202 | * assume the descriptors are already chained together by caller. |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1203 | */ |
Sujith | 102e057 | 2008-10-29 10:15:16 +0530 | [diff] [blame] | 1204 | static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, |
| 1205 | struct list_head *head) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1206 | { |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 1207 | struct ath_hw *ah = sc->sc_ah; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1208 | struct ath_common *common = ath9k_hw_common(ah); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1209 | struct ath_buf *bf; |
Sujith | 102e057 | 2008-10-29 10:15:16 +0530 | [diff] [blame] | 1210 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1211 | /* |
| 1212 | * Insert the frame on the outbound list and |
| 1213 | * pass it on to the hardware. |
| 1214 | */ |
| 1215 | |
| 1216 | if (list_empty(head)) |
| 1217 | return; |
| 1218 | |
| 1219 | bf = list_first_entry(head, struct ath_buf, list); |
| 1220 | |
| 1221 | list_splice_tail_init(head, &txq->axq_q); |
| 1222 | txq->axq_depth++; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1223 | |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1224 | ath_print(common, ATH_DBG_QUEUE, |
| 1225 | "qnum: %d, txq depth: %d\n", txq->axq_qnum, txq->axq_depth); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1226 | |
| 1227 | if (txq->axq_link == NULL) { |
| 1228 | ath9k_hw_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1229 | ath_print(common, ATH_DBG_XMIT, |
| 1230 | "TXDP[%u] = %llx (%p)\n", |
| 1231 | txq->axq_qnum, ito64(bf->bf_daddr), bf->bf_desc); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1232 | } else { |
| 1233 | *txq->axq_link = bf->bf_daddr; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1234 | ath_print(common, ATH_DBG_XMIT, "link[%u] (%p)=%llx (%p)\n", |
| 1235 | txq->axq_qnum, txq->axq_link, |
| 1236 | ito64(bf->bf_daddr), bf->bf_desc); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1237 | } |
| 1238 | txq->axq_link = &(bf->bf_lastbf->bf_desc->ds_link); |
| 1239 | ath9k_hw_txstart(ah, txq->axq_qnum); |
| 1240 | } |
| 1241 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1242 | static struct ath_buf *ath_tx_get_buffer(struct ath_softc *sc) |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 1243 | { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1244 | struct ath_buf *bf = NULL; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 1245 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1246 | spin_lock_bh(&sc->tx.txbuflock); |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 1247 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1248 | if (unlikely(list_empty(&sc->tx.txbuf))) { |
| 1249 | spin_unlock_bh(&sc->tx.txbuflock); |
| 1250 | return NULL; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 1251 | } |
| 1252 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1253 | bf = list_first_entry(&sc->tx.txbuf, struct ath_buf, list); |
| 1254 | list_del(&bf->list); |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 1255 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1256 | spin_unlock_bh(&sc->tx.txbuflock); |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 1257 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1258 | return bf; |
| 1259 | } |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 1260 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1261 | static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid, |
| 1262 | struct list_head *bf_head, |
| 1263 | struct ath_tx_control *txctl) |
| 1264 | { |
| 1265 | struct ath_buf *bf; |
| 1266 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1267 | bf = list_first_entry(bf_head, struct ath_buf, list); |
| 1268 | bf->bf_state.bf_type |= BUF_AMPDU; |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 1269 | TX_STAT_INC(txctl->txq->axq_qnum, a_queued); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1270 | |
| 1271 | /* |
| 1272 | * Do not queue to h/w when any of the following conditions is true: |
| 1273 | * - there are pending frames in software queue |
| 1274 | * - the TID is currently paused for ADDBA/BAR request |
| 1275 | * - seqno is not within block-ack window |
| 1276 | * - h/w queue depth exceeds low water mark |
| 1277 | */ |
| 1278 | if (!list_empty(&tid->buf_q) || tid->paused || |
| 1279 | !BAW_WITHIN(tid->seq_start, tid->baw_size, bf->bf_seqno) || |
| 1280 | txctl->txq->axq_depth >= ATH_AGGR_MIN_QDEPTH) { |
Jouni Malinen | f7a276a | 2008-12-15 16:02:04 +0200 | [diff] [blame] | 1281 | /* |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1282 | * Add this frame to software queue for scheduling later |
| 1283 | * for aggregation. |
Jouni Malinen | f7a276a | 2008-12-15 16:02:04 +0200 | [diff] [blame] | 1284 | */ |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 1285 | list_move_tail(&bf->list, &tid->buf_q); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1286 | ath_tx_queue_tid(txctl->txq, tid); |
| 1287 | return; |
Jouni Malinen | f7a276a | 2008-12-15 16:02:04 +0200 | [diff] [blame] | 1288 | } |
| 1289 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1290 | /* Add sub-frame to BAW */ |
| 1291 | ath_tx_addto_baw(sc, tid, bf); |
| 1292 | |
| 1293 | /* Queue to h/w without aggregation */ |
| 1294 | bf->bf_nframes = 1; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 1295 | bf->bf_lastbf = bf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1296 | ath_buf_set_rate(sc, bf); |
| 1297 | ath_tx_txqaddbuf(sc, txctl->txq, bf_head); |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 1298 | } |
| 1299 | |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 1300 | static void ath_tx_send_ht_normal(struct ath_softc *sc, struct ath_txq *txq, |
| 1301 | struct ath_atx_tid *tid, |
| 1302 | struct list_head *bf_head) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1303 | { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1304 | struct ath_buf *bf; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1305 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1306 | bf = list_first_entry(bf_head, struct ath_buf, list); |
| 1307 | bf->bf_state.bf_type &= ~BUF_AMPDU; |
| 1308 | |
| 1309 | /* update starting sequence number for subsequent ADDBA request */ |
| 1310 | INCR(tid->seq_start, IEEE80211_SEQ_MAX); |
| 1311 | |
| 1312 | bf->bf_nframes = 1; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 1313 | bf->bf_lastbf = bf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1314 | ath_buf_set_rate(sc, bf); |
| 1315 | ath_tx_txqaddbuf(sc, txq, bf_head); |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 1316 | TX_STAT_INC(txq->axq_qnum, queued); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1317 | } |
| 1318 | |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 1319 | static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq, |
| 1320 | struct list_head *bf_head) |
| 1321 | { |
| 1322 | struct ath_buf *bf; |
| 1323 | |
| 1324 | bf = list_first_entry(bf_head, struct ath_buf, list); |
| 1325 | |
| 1326 | bf->bf_lastbf = bf; |
| 1327 | bf->bf_nframes = 1; |
| 1328 | ath_buf_set_rate(sc, bf); |
| 1329 | ath_tx_txqaddbuf(sc, txq, bf_head); |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 1330 | TX_STAT_INC(txq->axq_qnum, queued); |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 1331 | } |
| 1332 | |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1333 | static enum ath9k_pkt_type get_hw_packet_type(struct sk_buff *skb) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1334 | { |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1335 | struct ieee80211_hdr *hdr; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1336 | enum ath9k_pkt_type htype; |
| 1337 | __le16 fc; |
| 1338 | |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1339 | hdr = (struct ieee80211_hdr *)skb->data; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1340 | fc = hdr->frame_control; |
| 1341 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1342 | if (ieee80211_is_beacon(fc)) |
| 1343 | htype = ATH9K_PKT_TYPE_BEACON; |
| 1344 | else if (ieee80211_is_probe_resp(fc)) |
| 1345 | htype = ATH9K_PKT_TYPE_PROBE_RESP; |
| 1346 | else if (ieee80211_is_atim(fc)) |
| 1347 | htype = ATH9K_PKT_TYPE_ATIM; |
| 1348 | else if (ieee80211_is_pspoll(fc)) |
| 1349 | htype = ATH9K_PKT_TYPE_PSPOLL; |
| 1350 | else |
| 1351 | htype = ATH9K_PKT_TYPE_NORMAL; |
| 1352 | |
| 1353 | return htype; |
| 1354 | } |
| 1355 | |
Sujith | a8efee4 | 2008-11-18 09:07:30 +0530 | [diff] [blame] | 1356 | static bool is_pae(struct sk_buff *skb) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1357 | { |
| 1358 | struct ieee80211_hdr *hdr; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1359 | __le16 fc; |
| 1360 | |
| 1361 | hdr = (struct ieee80211_hdr *)skb->data; |
| 1362 | fc = hdr->frame_control; |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 1363 | |
Sujith | a8efee4 | 2008-11-18 09:07:30 +0530 | [diff] [blame] | 1364 | if (ieee80211_is_data(fc)) { |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1365 | if (ieee80211_is_nullfunc(fc) || |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1366 | /* Port Access Entity (IEEE 802.1X) */ |
| 1367 | (skb->protocol == cpu_to_be16(ETH_P_PAE))) { |
Sujith | a8efee4 | 2008-11-18 09:07:30 +0530 | [diff] [blame] | 1368 | return true; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1369 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1370 | } |
| 1371 | |
Sujith | a8efee4 | 2008-11-18 09:07:30 +0530 | [diff] [blame] | 1372 | return false; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1373 | } |
| 1374 | |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1375 | static int get_hw_crypto_keytype(struct sk_buff *skb) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1376 | { |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1377 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
| 1378 | |
| 1379 | if (tx_info->control.hw_key) { |
| 1380 | if (tx_info->control.hw_key->alg == ALG_WEP) |
| 1381 | return ATH9K_KEY_TYPE_WEP; |
| 1382 | else if (tx_info->control.hw_key->alg == ALG_TKIP) |
| 1383 | return ATH9K_KEY_TYPE_TKIP; |
| 1384 | else if (tx_info->control.hw_key->alg == ALG_CCMP) |
| 1385 | return ATH9K_KEY_TYPE_AES; |
| 1386 | } |
| 1387 | |
| 1388 | return ATH9K_KEY_TYPE_CLEAR; |
| 1389 | } |
| 1390 | |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1391 | static void assign_aggr_tid_seqno(struct sk_buff *skb, |
| 1392 | struct ath_buf *bf) |
| 1393 | { |
| 1394 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
| 1395 | struct ieee80211_hdr *hdr; |
| 1396 | struct ath_node *an; |
| 1397 | struct ath_atx_tid *tid; |
| 1398 | __le16 fc; |
| 1399 | u8 *qc; |
| 1400 | |
| 1401 | if (!tx_info->control.sta) |
| 1402 | return; |
| 1403 | |
| 1404 | an = (struct ath_node *)tx_info->control.sta->drv_priv; |
| 1405 | hdr = (struct ieee80211_hdr *)skb->data; |
| 1406 | fc = hdr->frame_control; |
| 1407 | |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1408 | if (ieee80211_is_data_qos(fc)) { |
| 1409 | qc = ieee80211_get_qos_ctl(hdr); |
| 1410 | bf->bf_tidno = qc[0] & 0xf; |
Sujith | 98deeea | 2008-08-11 14:05:46 +0530 | [diff] [blame] | 1411 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1412 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1413 | /* |
| 1414 | * For HT capable stations, we save tidno for later use. |
Senthil Balasubramanian | d3a1db1 | 2008-12-22 16:31:58 +0530 | [diff] [blame] | 1415 | * We also override seqno set by upper layer with the one |
| 1416 | * in tx aggregation state. |
| 1417 | * |
| 1418 | * If fragmentation is on, the sequence number is |
| 1419 | * not overridden, since it has been |
| 1420 | * incremented by the fragmentation routine. |
| 1421 | * |
| 1422 | * FIXME: check if the fragmentation threshold exceeds |
| 1423 | * IEEE80211 max. |
| 1424 | */ |
| 1425 | tid = ATH_AN_2_TID(an, bf->bf_tidno); |
| 1426 | hdr->seq_ctrl = cpu_to_le16(tid->seq_next << |
| 1427 | IEEE80211_SEQ_SEQ_SHIFT); |
| 1428 | bf->bf_seqno = tid->seq_next; |
| 1429 | INCR(tid->seq_next, IEEE80211_SEQ_MAX); |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1430 | } |
| 1431 | |
| 1432 | static int setup_tx_flags(struct ath_softc *sc, struct sk_buff *skb, |
| 1433 | struct ath_txq *txq) |
| 1434 | { |
| 1435 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
| 1436 | int flags = 0; |
| 1437 | |
| 1438 | flags |= ATH9K_TXDESC_CLRDMASK; /* needed for crypto errors */ |
| 1439 | flags |= ATH9K_TXDESC_INTREQ; |
| 1440 | |
| 1441 | if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK) |
| 1442 | flags |= ATH9K_TXDESC_NOACK; |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1443 | |
| 1444 | return flags; |
| 1445 | } |
| 1446 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1447 | /* |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1448 | * rix - rate index |
| 1449 | * pktlen - total bytes (delims + data + fcs + pads + pad delims) |
| 1450 | * width - 0 for 20 MHz, 1 for 40 MHz |
| 1451 | * half_gi - to use 4us v/s 3.6 us for symbol time |
| 1452 | */ |
Sujith | 102e057 | 2008-10-29 10:15:16 +0530 | [diff] [blame] | 1453 | static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, struct ath_buf *bf, |
| 1454 | int width, int half_gi, bool shortPreamble) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1455 | { |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1456 | u32 nbits, nsymbits, duration, nsymbols; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1457 | int streams, pktlen; |
| 1458 | |
Sujith | cd3d39a | 2008-08-11 14:03:34 +0530 | [diff] [blame] | 1459 | pktlen = bf_isaggr(bf) ? bf->bf_al : bf->bf_frmlen; |
Sujith | e63835b | 2008-11-18 09:07:53 +0530 | [diff] [blame] | 1460 | |
| 1461 | /* find number of symbols: PLCP + data */ |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1462 | nbits = (pktlen << 3) + OFDM_PLCP_BITS; |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 1463 | nsymbits = bits_per_symbol[rix][width]; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1464 | nsymbols = (nbits + nsymbits - 1) / nsymbits; |
| 1465 | |
| 1466 | if (!half_gi) |
| 1467 | duration = SYMBOL_TIME(nsymbols); |
| 1468 | else |
| 1469 | duration = SYMBOL_TIME_HALFGI(nsymbols); |
| 1470 | |
Sujith | e63835b | 2008-11-18 09:07:53 +0530 | [diff] [blame] | 1471 | /* addup duration for legacy/ht training and signal fields */ |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 1472 | streams = HT_RC_2_STREAMS(rix); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1473 | duration += L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams); |
Sujith | 102e057 | 2008-10-29 10:15:16 +0530 | [diff] [blame] | 1474 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1475 | return duration; |
| 1476 | } |
| 1477 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1478 | static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf) |
| 1479 | { |
Luis R. Rodriguez | 43c2761 | 2009-09-13 21:07:07 -0700 | [diff] [blame] | 1480 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1481 | struct ath9k_11n_rate_series series[4]; |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1482 | struct sk_buff *skb; |
| 1483 | struct ieee80211_tx_info *tx_info; |
Sujith | a8efee4 | 2008-11-18 09:07:30 +0530 | [diff] [blame] | 1484 | struct ieee80211_tx_rate *rates; |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 1485 | const struct ieee80211_rate *rate; |
Sujith | 254ad0f | 2009-02-04 08:10:19 +0530 | [diff] [blame] | 1486 | struct ieee80211_hdr *hdr; |
Sujith | c89424d | 2009-01-30 14:29:28 +0530 | [diff] [blame] | 1487 | int i, flags = 0; |
| 1488 | u8 rix = 0, ctsrate = 0; |
Sujith | 254ad0f | 2009-02-04 08:10:19 +0530 | [diff] [blame] | 1489 | bool is_pspoll; |
Sujith | e63835b | 2008-11-18 09:07:53 +0530 | [diff] [blame] | 1490 | |
| 1491 | memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4); |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1492 | |
Sujith | a22be22 | 2009-03-30 15:28:36 +0530 | [diff] [blame] | 1493 | skb = bf->bf_mpdu; |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1494 | tx_info = IEEE80211_SKB_CB(skb); |
Sujith | e63835b | 2008-11-18 09:07:53 +0530 | [diff] [blame] | 1495 | rates = tx_info->control.rates; |
Sujith | 254ad0f | 2009-02-04 08:10:19 +0530 | [diff] [blame] | 1496 | hdr = (struct ieee80211_hdr *)skb->data; |
| 1497 | is_pspoll = ieee80211_is_pspoll(hdr->frame_control); |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1498 | |
Sujith | c89424d | 2009-01-30 14:29:28 +0530 | [diff] [blame] | 1499 | /* |
| 1500 | * We check if Short Preamble is needed for the CTS rate by |
| 1501 | * checking the BSS's global flag. |
| 1502 | * But for the rate series, IEEE80211_TX_RC_USE_SHORT_PREAMBLE is used. |
| 1503 | */ |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 1504 | rate = ieee80211_get_rts_cts_rate(sc->hw, tx_info); |
| 1505 | ctsrate = rate->hw_value; |
Sujith | c89424d | 2009-01-30 14:29:28 +0530 | [diff] [blame] | 1506 | if (sc->sc_flags & SC_OP_PREAMBLE_SHORT) |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 1507 | ctsrate |= rate->hw_value_short; |
Luis R. Rodriguez | 9674225 | 2008-12-23 15:58:38 -0800 | [diff] [blame] | 1508 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1509 | /* |
Sujith | c89424d | 2009-01-30 14:29:28 +0530 | [diff] [blame] | 1510 | * ATH9K_TXDESC_RTSENA and ATH9K_TXDESC_CTSENA are mutually exclusive. |
| 1511 | * Check the first rate in the series to decide whether RTS/CTS |
| 1512 | * or CTS-to-self has to be used. |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1513 | */ |
Sujith | c89424d | 2009-01-30 14:29:28 +0530 | [diff] [blame] | 1514 | if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
| 1515 | flags = ATH9K_TXDESC_CTSENA; |
| 1516 | else if (rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
| 1517 | flags = ATH9K_TXDESC_RTSENA; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1518 | |
Sujith | c89424d | 2009-01-30 14:29:28 +0530 | [diff] [blame] | 1519 | /* FIXME: Handle aggregation protection */ |
Sujith | 17d7904 | 2009-02-09 13:27:03 +0530 | [diff] [blame] | 1520 | if (sc->config.ath_aggr_prot && |
Sujith | cd3d39a | 2008-08-11 14:03:34 +0530 | [diff] [blame] | 1521 | (!bf_isaggr(bf) || (bf_isaggr(bf) && bf->bf_al < 8192))) { |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1522 | flags = ATH9K_TXDESC_RTSENA; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1523 | } |
| 1524 | |
Sujith | e63835b | 2008-11-18 09:07:53 +0530 | [diff] [blame] | 1525 | /* For AR5416 - RTS cannot be followed by a frame larger than 8K */ |
Sujith | 2660b81 | 2009-02-09 13:27:26 +0530 | [diff] [blame] | 1526 | if (bf_isaggr(bf) && (bf->bf_al > sc->sc_ah->caps.rts_aggr_limit)) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1527 | flags &= ~(ATH9K_TXDESC_RTSENA); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1528 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1529 | for (i = 0; i < 4; i++) { |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 1530 | bool is_40, is_sgi, is_sp; |
| 1531 | int phy; |
| 1532 | |
Sujith | e63835b | 2008-11-18 09:07:53 +0530 | [diff] [blame] | 1533 | if (!rates[i].count || (rates[i].idx < 0)) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1534 | continue; |
| 1535 | |
Sujith | a8efee4 | 2008-11-18 09:07:30 +0530 | [diff] [blame] | 1536 | rix = rates[i].idx; |
Sujith | a8efee4 | 2008-11-18 09:07:30 +0530 | [diff] [blame] | 1537 | series[i].Tries = rates[i].count; |
Luis R. Rodriguez | 43c2761 | 2009-09-13 21:07:07 -0700 | [diff] [blame] | 1538 | series[i].ChSel = common->tx_chainmask; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1539 | |
Sujith | c89424d | 2009-01-30 14:29:28 +0530 | [diff] [blame] | 1540 | if (rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
| 1541 | series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; |
| 1542 | if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) |
| 1543 | series[i].RateFlags |= ATH9K_RATESERIES_2040; |
| 1544 | if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI) |
| 1545 | series[i].RateFlags |= ATH9K_RATESERIES_HALFGI; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1546 | |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 1547 | is_sgi = !!(rates[i].flags & IEEE80211_TX_RC_SHORT_GI); |
| 1548 | is_40 = !!(rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH); |
| 1549 | is_sp = !!(rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE); |
| 1550 | |
| 1551 | if (rates[i].flags & IEEE80211_TX_RC_MCS) { |
| 1552 | /* MCS rates */ |
| 1553 | series[i].Rate = rix | 0x80; |
| 1554 | series[i].PktDuration = ath_pkt_duration(sc, rix, bf, |
| 1555 | is_40, is_sgi, is_sp); |
| 1556 | continue; |
| 1557 | } |
| 1558 | |
| 1559 | /* legcay rates */ |
| 1560 | if ((tx_info->band == IEEE80211_BAND_2GHZ) && |
| 1561 | !(rate->flags & IEEE80211_RATE_ERP_G)) |
| 1562 | phy = WLAN_RC_PHY_CCK; |
| 1563 | else |
| 1564 | phy = WLAN_RC_PHY_OFDM; |
| 1565 | |
| 1566 | rate = &sc->sbands[tx_info->band].bitrates[rates[i].idx]; |
| 1567 | series[i].Rate = rate->hw_value; |
| 1568 | if (rate->hw_value_short) { |
| 1569 | if (rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) |
| 1570 | series[i].Rate |= rate->hw_value_short; |
| 1571 | } else { |
| 1572 | is_sp = false; |
| 1573 | } |
| 1574 | |
| 1575 | series[i].PktDuration = ath9k_hw_computetxtime(sc->sc_ah, |
| 1576 | phy, rate->bitrate * 100, bf->bf_frmlen, rix, is_sp); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1577 | } |
| 1578 | |
Sujith | e63835b | 2008-11-18 09:07:53 +0530 | [diff] [blame] | 1579 | /* set dur_update_en for l-sig computation except for PS-Poll frames */ |
Sujith | c89424d | 2009-01-30 14:29:28 +0530 | [diff] [blame] | 1580 | ath9k_hw_set11n_ratescenario(sc->sc_ah, bf->bf_desc, |
| 1581 | bf->bf_lastbf->bf_desc, |
Sujith | 254ad0f | 2009-02-04 08:10:19 +0530 | [diff] [blame] | 1582 | !is_pspoll, ctsrate, |
Sujith | c89424d | 2009-01-30 14:29:28 +0530 | [diff] [blame] | 1583 | 0, series, 4, flags); |
Sujith | 102e057 | 2008-10-29 10:15:16 +0530 | [diff] [blame] | 1584 | |
Sujith | 17d7904 | 2009-02-09 13:27:03 +0530 | [diff] [blame] | 1585 | if (sc->config.ath_aggr_prot && flags) |
Sujith | c89424d | 2009-01-30 14:29:28 +0530 | [diff] [blame] | 1586 | ath9k_hw_set11n_burstduration(sc->sc_ah, bf->bf_desc, 8192); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1587 | } |
| 1588 | |
Jouni Malinen | c52f33d | 2009-03-03 19:23:29 +0200 | [diff] [blame] | 1589 | static int ath_tx_setup_buffer(struct ieee80211_hw *hw, struct ath_buf *bf, |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1590 | struct sk_buff *skb, |
| 1591 | struct ath_tx_control *txctl) |
| 1592 | { |
Jouni Malinen | c52f33d | 2009-03-03 19:23:29 +0200 | [diff] [blame] | 1593 | struct ath_wiphy *aphy = hw->priv; |
| 1594 | struct ath_softc *sc = aphy->sc; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1595 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
| 1596 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1597 | int hdrlen; |
| 1598 | __le16 fc; |
Benoit Papillault | 1bc1488 | 2009-11-24 15:49:18 +0100 | [diff] [blame] | 1599 | int padpos, padsize; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1600 | |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 1601 | tx_info->pad[0] = 0; |
| 1602 | switch (txctl->frame_type) { |
| 1603 | case ATH9K_NOT_INTERNAL: |
| 1604 | break; |
| 1605 | case ATH9K_INT_PAUSE: |
| 1606 | tx_info->pad[0] |= ATH_TX_INFO_FRAME_TYPE_PAUSE; |
| 1607 | /* fall through */ |
| 1608 | case ATH9K_INT_UNPAUSE: |
| 1609 | tx_info->pad[0] |= ATH_TX_INFO_FRAME_TYPE_INTERNAL; |
| 1610 | break; |
| 1611 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1612 | hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
| 1613 | fc = hdr->frame_control; |
| 1614 | |
| 1615 | ATH_TXBUF_RESET(bf); |
| 1616 | |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 1617 | bf->aphy = aphy; |
Benoit Papillault | 1bc1488 | 2009-11-24 15:49:18 +0100 | [diff] [blame] | 1618 | bf->bf_frmlen = skb->len + FCS_LEN; |
| 1619 | /* Remove the padding size from bf_frmlen, if any */ |
| 1620 | padpos = ath9k_cmn_padpos(hdr->frame_control); |
| 1621 | padsize = padpos & 3; |
| 1622 | if (padsize && skb->len>padpos+padsize) { |
| 1623 | bf->bf_frmlen -= padsize; |
| 1624 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1625 | |
Luis R. Rodriguez | 5008f37 | 2009-11-02 16:27:33 -0800 | [diff] [blame] | 1626 | if (conf_is_ht(&hw->conf) && !is_pae(skb)) |
Sujith | c656bbb | 2009-01-16 21:38:56 +0530 | [diff] [blame] | 1627 | bf->bf_state.bf_type |= BUF_HT; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1628 | |
| 1629 | bf->bf_flags = setup_tx_flags(sc, skb, txctl->txq); |
| 1630 | |
| 1631 | bf->bf_keytype = get_hw_crypto_keytype(skb); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1632 | if (bf->bf_keytype != ATH9K_KEY_TYPE_CLEAR) { |
| 1633 | bf->bf_frmlen += tx_info->control.hw_key->icv_len; |
| 1634 | bf->bf_keyix = tx_info->control.hw_key->hw_key_idx; |
| 1635 | } else { |
| 1636 | bf->bf_keyix = ATH9K_TXKEYIX_INVALID; |
| 1637 | } |
| 1638 | |
| 1639 | if (ieee80211_is_data_qos(fc) && (sc->sc_flags & SC_OP_TXAGGR)) |
| 1640 | assign_aggr_tid_seqno(skb, bf); |
| 1641 | |
| 1642 | bf->bf_mpdu = skb; |
| 1643 | |
| 1644 | bf->bf_dmacontext = dma_map_single(sc->dev, skb->data, |
| 1645 | skb->len, DMA_TO_DEVICE); |
| 1646 | if (unlikely(dma_mapping_error(sc->dev, bf->bf_dmacontext))) { |
| 1647 | bf->bf_mpdu = NULL; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1648 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL, |
| 1649 | "dma_mapping_error() on TX\n"); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1650 | return -ENOMEM; |
| 1651 | } |
| 1652 | |
| 1653 | bf->bf_buf_addr = bf->bf_dmacontext; |
Luis R. Rodriguez | e7824a5 | 2009-11-24 02:53:25 -0500 | [diff] [blame] | 1654 | |
| 1655 | /* tag if this is a nullfunc frame to enable PS when AP acks it */ |
| 1656 | if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc)) { |
| 1657 | bf->bf_isnullfunc = true; |
| 1658 | sc->sc_flags &= ~SC_OP_NULLFUNC_COMPLETED; |
| 1659 | } else |
| 1660 | bf->bf_isnullfunc = false; |
| 1661 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1662 | return 0; |
| 1663 | } |
| 1664 | |
| 1665 | /* FIXME: tx power */ |
| 1666 | static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf, |
| 1667 | struct ath_tx_control *txctl) |
| 1668 | { |
Sujith | a22be22 | 2009-03-30 15:28:36 +0530 | [diff] [blame] | 1669 | struct sk_buff *skb = bf->bf_mpdu; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1670 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 1671 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1672 | struct ath_node *an = NULL; |
| 1673 | struct list_head bf_head; |
| 1674 | struct ath_desc *ds; |
| 1675 | struct ath_atx_tid *tid; |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 1676 | struct ath_hw *ah = sc->sc_ah; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1677 | int frm_type; |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 1678 | __le16 fc; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1679 | |
| 1680 | frm_type = get_hw_packet_type(skb); |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 1681 | fc = hdr->frame_control; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1682 | |
| 1683 | INIT_LIST_HEAD(&bf_head); |
| 1684 | list_add_tail(&bf->list, &bf_head); |
| 1685 | |
| 1686 | ds = bf->bf_desc; |
| 1687 | ds->ds_link = 0; |
| 1688 | ds->ds_data = bf->bf_buf_addr; |
| 1689 | |
| 1690 | ath9k_hw_set11n_txdesc(ah, ds, bf->bf_frmlen, frm_type, MAX_RATE_POWER, |
| 1691 | bf->bf_keyix, bf->bf_keytype, bf->bf_flags); |
| 1692 | |
| 1693 | ath9k_hw_filltxdesc(ah, ds, |
| 1694 | skb->len, /* segment length */ |
| 1695 | true, /* first segment */ |
| 1696 | true, /* last segment */ |
| 1697 | ds); /* first descriptor */ |
| 1698 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1699 | spin_lock_bh(&txctl->txq->axq_lock); |
| 1700 | |
| 1701 | if (bf_isht(bf) && (sc->sc_flags & SC_OP_TXAGGR) && |
| 1702 | tx_info->control.sta) { |
| 1703 | an = (struct ath_node *)tx_info->control.sta->drv_priv; |
| 1704 | tid = ATH_AN_2_TID(an, bf->bf_tidno); |
| 1705 | |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 1706 | if (!ieee80211_is_data_qos(fc)) { |
| 1707 | ath_tx_send_normal(sc, txctl->txq, &bf_head); |
| 1708 | goto tx_done; |
| 1709 | } |
| 1710 | |
Vasanthakumar Thiagarajan | 089e698 | 2009-06-10 17:50:07 +0530 | [diff] [blame] | 1711 | if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1712 | /* |
| 1713 | * Try aggregation if it's a unicast data frame |
| 1714 | * and the destination is HT capable. |
| 1715 | */ |
| 1716 | ath_tx_send_ampdu(sc, tid, &bf_head, txctl); |
| 1717 | } else { |
| 1718 | /* |
| 1719 | * Send this frame as regular when ADDBA |
| 1720 | * exchange is neither complete nor pending. |
| 1721 | */ |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 1722 | ath_tx_send_ht_normal(sc, txctl->txq, |
| 1723 | tid, &bf_head); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1724 | } |
| 1725 | } else { |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 1726 | ath_tx_send_normal(sc, txctl->txq, &bf_head); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1727 | } |
| 1728 | |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 1729 | tx_done: |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1730 | spin_unlock_bh(&txctl->txq->axq_lock); |
| 1731 | } |
| 1732 | |
| 1733 | /* Upon failure caller should free skb */ |
Jouni Malinen | c52f33d | 2009-03-03 19:23:29 +0200 | [diff] [blame] | 1734 | int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb, |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1735 | struct ath_tx_control *txctl) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1736 | { |
Jouni Malinen | c52f33d | 2009-03-03 19:23:29 +0200 | [diff] [blame] | 1737 | struct ath_wiphy *aphy = hw->priv; |
| 1738 | struct ath_softc *sc = aphy->sc; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1739 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1740 | struct ath_buf *bf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1741 | int r; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1742 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1743 | bf = ath_tx_get_buffer(sc); |
| 1744 | if (!bf) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1745 | ath_print(common, ATH_DBG_XMIT, "TX buffers are full\n"); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1746 | return -1; |
| 1747 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1748 | |
Jouni Malinen | c52f33d | 2009-03-03 19:23:29 +0200 | [diff] [blame] | 1749 | r = ath_tx_setup_buffer(hw, bf, skb, txctl); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1750 | if (unlikely(r)) { |
| 1751 | struct ath_txq *txq = txctl->txq; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1752 | |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1753 | ath_print(common, ATH_DBG_FATAL, "TX mem alloc failure\n"); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1754 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1755 | /* upon ath_tx_processq() this TX queue will be resumed, we |
| 1756 | * guarantee this will happen by knowing beforehand that |
| 1757 | * we will at least have to run TX completionon one buffer |
| 1758 | * on the queue */ |
| 1759 | spin_lock_bh(&txq->axq_lock); |
Sujith | f7a99e4 | 2009-02-17 15:36:33 +0530 | [diff] [blame] | 1760 | if (sc->tx.txq[txq->axq_qnum].axq_depth > 1) { |
Luis R. Rodriguez | f52de03 | 2009-11-02 17:09:12 -0800 | [diff] [blame] | 1761 | ath_mac80211_stop_queue(sc, skb_get_queue_mapping(skb)); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1762 | txq->stopped = 1; |
| 1763 | } |
| 1764 | spin_unlock_bh(&txq->axq_lock); |
| 1765 | |
| 1766 | spin_lock_bh(&sc->tx.txbuflock); |
| 1767 | list_add_tail(&bf->list, &sc->tx.txbuf); |
| 1768 | spin_unlock_bh(&sc->tx.txbuflock); |
| 1769 | |
| 1770 | return r; |
| 1771 | } |
| 1772 | |
| 1773 | ath_tx_start_dma(sc, bf, txctl); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1774 | |
| 1775 | return 0; |
| 1776 | } |
| 1777 | |
Jouni Malinen | c52f33d | 2009-03-03 19:23:29 +0200 | [diff] [blame] | 1778 | void ath_tx_cabq(struct ieee80211_hw *hw, struct sk_buff *skb) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1779 | { |
Jouni Malinen | c52f33d | 2009-03-03 19:23:29 +0200 | [diff] [blame] | 1780 | struct ath_wiphy *aphy = hw->priv; |
| 1781 | struct ath_softc *sc = aphy->sc; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1782 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1783 | int hdrlen, padsize; |
| 1784 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 1785 | struct ath_tx_control txctl; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1786 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1787 | memset(&txctl, 0, sizeof(struct ath_tx_control)); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1788 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1789 | /* |
| 1790 | * As a temporary workaround, assign seq# here; this will likely need |
| 1791 | * to be cleaned up to work better with Beacon transmission and virtual |
| 1792 | * BSSes. |
| 1793 | */ |
| 1794 | if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { |
| 1795 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 1796 | if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) |
| 1797 | sc->tx.seq_no += 0x10; |
| 1798 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); |
| 1799 | hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1800 | } |
| 1801 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1802 | /* Add the padding after the header if this is not already done */ |
| 1803 | hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
| 1804 | if (hdrlen & 3) { |
| 1805 | padsize = hdrlen % 4; |
| 1806 | if (skb_headroom(skb) < padsize) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1807 | ath_print(common, ATH_DBG_XMIT, |
| 1808 | "TX CABQ padding failed\n"); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1809 | dev_kfree_skb_any(skb); |
| 1810 | return; |
| 1811 | } |
| 1812 | skb_push(skb, padsize); |
| 1813 | memmove(skb->data, skb->data + padsize, hdrlen); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1814 | } |
| 1815 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1816 | txctl.txq = sc->beacon.cabq; |
| 1817 | |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1818 | ath_print(common, ATH_DBG_XMIT, |
| 1819 | "transmitting CABQ packet, skb: %p\n", skb); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1820 | |
Jouni Malinen | c52f33d | 2009-03-03 19:23:29 +0200 | [diff] [blame] | 1821 | if (ath_tx_start(hw, skb, &txctl) != 0) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1822 | ath_print(common, ATH_DBG_XMIT, "CABQ TX failed\n"); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1823 | goto exit; |
| 1824 | } |
| 1825 | |
| 1826 | return; |
| 1827 | exit: |
| 1828 | dev_kfree_skb_any(skb); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1829 | } |
| 1830 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1831 | /*****************/ |
| 1832 | /* TX Completion */ |
| 1833 | /*****************/ |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1834 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1835 | static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb, |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 1836 | struct ath_wiphy *aphy, int tx_flags) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1837 | { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1838 | struct ieee80211_hw *hw = sc->hw; |
| 1839 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1840 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1841 | int hdrlen, padsize; |
| 1842 | |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1843 | ath_print(common, ATH_DBG_XMIT, "TX complete: skb: %p\n", skb); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1844 | |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 1845 | if (aphy) |
| 1846 | hw = aphy->hw; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1847 | |
Vasanthakumar Thiagarajan | 6b2c403 | 2009-03-20 15:27:50 +0530 | [diff] [blame] | 1848 | if (tx_flags & ATH_TX_BAR) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1849 | tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1850 | |
Vasanthakumar Thiagarajan | 6b2c403 | 2009-03-20 15:27:50 +0530 | [diff] [blame] | 1851 | if (!(tx_flags & (ATH_TX_ERROR | ATH_TX_XRETRY))) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1852 | /* Frame was ACKed */ |
| 1853 | tx_info->flags |= IEEE80211_TX_STAT_ACK; |
| 1854 | } |
| 1855 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1856 | hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
| 1857 | padsize = hdrlen & 3; |
| 1858 | if (padsize && hdrlen >= 24) { |
| 1859 | /* |
| 1860 | * Remove MAC header padding before giving the frame back to |
| 1861 | * mac80211. |
| 1862 | */ |
| 1863 | memmove(skb->data + padsize, skb->data, hdrlen); |
| 1864 | skb_pull(skb, padsize); |
| 1865 | } |
| 1866 | |
Jouni Malinen | 9a23f9c | 2009-05-19 17:01:38 +0300 | [diff] [blame] | 1867 | if (sc->sc_flags & SC_OP_WAIT_FOR_TX_ACK) { |
| 1868 | sc->sc_flags &= ~SC_OP_WAIT_FOR_TX_ACK; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1869 | ath_print(common, ATH_DBG_PS, |
| 1870 | "Going back to sleep after having " |
| 1871 | "received TX status (0x%x)\n", |
Jouni Malinen | 9a23f9c | 2009-05-19 17:01:38 +0300 | [diff] [blame] | 1872 | sc->sc_flags & (SC_OP_WAIT_FOR_BEACON | |
| 1873 | SC_OP_WAIT_FOR_CAB | |
| 1874 | SC_OP_WAIT_FOR_PSPOLL_DATA | |
| 1875 | SC_OP_WAIT_FOR_TX_ACK)); |
| 1876 | } |
| 1877 | |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 1878 | if (unlikely(tx_info->pad[0] & ATH_TX_INFO_FRAME_TYPE_INTERNAL)) |
Jouni Malinen | f0ed85c | 2009-03-03 19:23:31 +0200 | [diff] [blame] | 1879 | ath9k_tx_status(hw, skb); |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 1880 | else |
| 1881 | ieee80211_tx_status(hw, skb); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1882 | } |
| 1883 | |
| 1884 | static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 1885 | struct ath_txq *txq, |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1886 | struct list_head *bf_q, |
| 1887 | int txok, int sendbar) |
| 1888 | { |
| 1889 | struct sk_buff *skb = bf->bf_mpdu; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1890 | unsigned long flags; |
Vasanthakumar Thiagarajan | 6b2c403 | 2009-03-20 15:27:50 +0530 | [diff] [blame] | 1891 | int tx_flags = 0; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1892 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1893 | if (sendbar) |
Vasanthakumar Thiagarajan | 6b2c403 | 2009-03-20 15:27:50 +0530 | [diff] [blame] | 1894 | tx_flags = ATH_TX_BAR; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1895 | |
| 1896 | if (!txok) { |
Vasanthakumar Thiagarajan | 6b2c403 | 2009-03-20 15:27:50 +0530 | [diff] [blame] | 1897 | tx_flags |= ATH_TX_ERROR; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1898 | |
| 1899 | if (bf_isxretried(bf)) |
Vasanthakumar Thiagarajan | 6b2c403 | 2009-03-20 15:27:50 +0530 | [diff] [blame] | 1900 | tx_flags |= ATH_TX_XRETRY; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1901 | } |
| 1902 | |
| 1903 | dma_unmap_single(sc->dev, bf->bf_dmacontext, skb->len, DMA_TO_DEVICE); |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 1904 | ath_tx_complete(sc, skb, bf->aphy, tx_flags); |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 1905 | ath_debug_stat_tx(sc, txq, bf); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1906 | |
| 1907 | /* |
| 1908 | * Return the list of ath_buf of this mpdu to free queue |
| 1909 | */ |
| 1910 | spin_lock_irqsave(&sc->tx.txbuflock, flags); |
| 1911 | list_splice_tail_init(bf_q, &sc->tx.txbuf); |
| 1912 | spin_unlock_irqrestore(&sc->tx.txbuflock, flags); |
| 1913 | } |
| 1914 | |
| 1915 | static int ath_tx_num_badfrms(struct ath_softc *sc, struct ath_buf *bf, |
| 1916 | int txok) |
| 1917 | { |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1918 | struct ath_buf *bf_last = bf->bf_lastbf; |
| 1919 | struct ath_desc *ds = bf_last->bf_desc; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1920 | u16 seq_st = 0; |
| 1921 | u32 ba[WME_BA_BMP_SIZE >> 5]; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1922 | int ba_index; |
| 1923 | int nbad = 0; |
| 1924 | int isaggr = 0; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1925 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1926 | if (ds->ds_txstat.ts_flags == ATH9K_TX_SW_ABORTED) |
| 1927 | return 0; |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1928 | |
Sujith | cd3d39a | 2008-08-11 14:03:34 +0530 | [diff] [blame] | 1929 | isaggr = bf_isaggr(bf); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1930 | if (isaggr) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1931 | seq_st = ATH_DS_BA_SEQ(ds); |
| 1932 | memcpy(ba, ATH_DS_BA_BITMAP(ds), WME_BA_BMP_SIZE >> 3); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1933 | } |
| 1934 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1935 | while (bf) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1936 | ba_index = ATH_BA_INDEX(seq_st, bf->bf_seqno); |
| 1937 | if (!txok || (isaggr && !ATH_BA_ISSET(ba, ba_index))) |
| 1938 | nbad++; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1939 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1940 | bf = bf->bf_next; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1941 | } |
| 1942 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1943 | return nbad; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1944 | } |
| 1945 | |
Sujith | 95e4acb | 2009-03-13 08:56:09 +0530 | [diff] [blame] | 1946 | static void ath_tx_rc_status(struct ath_buf *bf, struct ath_desc *ds, |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 1947 | int nbad, int txok, bool update_rc) |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 1948 | { |
Sujith | a22be22 | 2009-03-30 15:28:36 +0530 | [diff] [blame] | 1949 | struct sk_buff *skb = bf->bf_mpdu; |
Sujith | 254ad0f | 2009-02-04 08:10:19 +0530 | [diff] [blame] | 1950 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 1951 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 1952 | struct ieee80211_hw *hw = bf->aphy->hw; |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 1953 | u8 i, tx_rateindex; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 1954 | |
Sujith | 95e4acb | 2009-03-13 08:56:09 +0530 | [diff] [blame] | 1955 | if (txok) |
| 1956 | tx_info->status.ack_signal = ds->ds_txstat.ts_rssi; |
| 1957 | |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 1958 | tx_rateindex = ds->ds_txstat.ts_rateindex; |
| 1959 | WARN_ON(tx_rateindex >= hw->max_rates); |
| 1960 | |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 1961 | if (update_rc) |
| 1962 | tx_info->pad[0] |= ATH_TX_INFO_UPDATE_RC; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 1963 | if (ds->ds_txstat.ts_status & ATH9K_TXERR_FILT) |
| 1964 | tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED; |
| 1965 | |
| 1966 | if ((ds->ds_txstat.ts_status & ATH9K_TXERR_FILT) == 0 && |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 1967 | (bf->bf_flags & ATH9K_TXDESC_NOACK) == 0 && update_rc) { |
Sujith | 254ad0f | 2009-02-04 08:10:19 +0530 | [diff] [blame] | 1968 | if (ieee80211_is_data(hdr->frame_control)) { |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 1969 | if (ds->ds_txstat.ts_flags & |
| 1970 | (ATH9K_TX_DATA_UNDERRUN | ATH9K_TX_DELIM_UNDERRUN)) |
| 1971 | tx_info->pad[0] |= ATH_TX_INFO_UNDERRUN; |
| 1972 | if ((ds->ds_txstat.ts_status & ATH9K_TXERR_XRETRY) || |
| 1973 | (ds->ds_txstat.ts_status & ATH9K_TXERR_FIFO)) |
| 1974 | tx_info->pad[0] |= ATH_TX_INFO_XRETRY; |
| 1975 | tx_info->status.ampdu_len = bf->bf_nframes; |
| 1976 | tx_info->status.ampdu_ack_len = bf->bf_nframes - nbad; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 1977 | } |
| 1978 | } |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 1979 | |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 1980 | for (i = tx_rateindex + 1; i < hw->max_rates; i++) { |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 1981 | tx_info->status.rates[i].count = 0; |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 1982 | tx_info->status.rates[i].idx = -1; |
| 1983 | } |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 1984 | |
| 1985 | tx_info->status.rates[tx_rateindex].count = bf->bf_retries + 1; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 1986 | } |
| 1987 | |
Sujith | 059d806 | 2009-01-16 21:38:49 +0530 | [diff] [blame] | 1988 | static void ath_wake_mac80211_queue(struct ath_softc *sc, struct ath_txq *txq) |
| 1989 | { |
| 1990 | int qnum; |
| 1991 | |
| 1992 | spin_lock_bh(&txq->axq_lock); |
| 1993 | if (txq->stopped && |
Sujith | f7a99e4 | 2009-02-17 15:36:33 +0530 | [diff] [blame] | 1994 | sc->tx.txq[txq->axq_qnum].axq_depth <= (ATH_TXBUF - 20)) { |
Sujith | 059d806 | 2009-01-16 21:38:49 +0530 | [diff] [blame] | 1995 | qnum = ath_get_mac80211_qnum(txq->axq_qnum, sc); |
| 1996 | if (qnum != -1) { |
Luis R. Rodriguez | f52de03 | 2009-11-02 17:09:12 -0800 | [diff] [blame] | 1997 | ath_mac80211_start_queue(sc, qnum); |
Sujith | 059d806 | 2009-01-16 21:38:49 +0530 | [diff] [blame] | 1998 | txq->stopped = 0; |
| 1999 | } |
| 2000 | } |
| 2001 | spin_unlock_bh(&txq->axq_lock); |
| 2002 | } |
| 2003 | |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2004 | 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] | 2005 | { |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 2006 | struct ath_hw *ah = sc->sc_ah; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 2007 | struct ath_common *common = ath9k_hw_common(ah); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2008 | struct ath_buf *bf, *lastbf, *bf_held = NULL; |
| 2009 | struct list_head bf_head; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2010 | struct ath_desc *ds; |
Vasanthakumar Thiagarajan | 0934af2 | 2009-03-18 20:22:00 +0530 | [diff] [blame] | 2011 | int txok; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2012 | int status; |
| 2013 | |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 2014 | ath_print(common, ATH_DBG_QUEUE, "tx queue %d (%x), link %p\n", |
| 2015 | txq->axq_qnum, ath9k_hw_gettxbuf(sc->sc_ah, txq->axq_qnum), |
| 2016 | txq->axq_link); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2017 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2018 | for (;;) { |
| 2019 | spin_lock_bh(&txq->axq_lock); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2020 | if (list_empty(&txq->axq_q)) { |
| 2021 | txq->axq_link = NULL; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2022 | spin_unlock_bh(&txq->axq_lock); |
| 2023 | break; |
| 2024 | } |
| 2025 | bf = list_first_entry(&txq->axq_q, struct ath_buf, list); |
| 2026 | |
| 2027 | /* |
| 2028 | * There is a race condition that a BH gets scheduled |
| 2029 | * after sw writes TxE and before hw re-load the last |
| 2030 | * descriptor to get the newly chained one. |
| 2031 | * Software must keep the last DONE descriptor as a |
| 2032 | * holding descriptor - software does so by marking |
| 2033 | * it with the STALE flag. |
| 2034 | */ |
| 2035 | bf_held = NULL; |
Sujith | a119cc4 | 2009-03-30 15:28:38 +0530 | [diff] [blame] | 2036 | if (bf->bf_stale) { |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2037 | bf_held = bf; |
| 2038 | if (list_is_last(&bf_held->list, &txq->axq_q)) { |
Sujith | 6ef9b13 | 2009-01-16 21:38:51 +0530 | [diff] [blame] | 2039 | spin_unlock_bh(&txq->axq_lock); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2040 | break; |
| 2041 | } else { |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2042 | bf = list_entry(bf_held->list.next, |
Sujith | 6ef9b13 | 2009-01-16 21:38:51 +0530 | [diff] [blame] | 2043 | struct ath_buf, list); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2044 | } |
| 2045 | } |
| 2046 | |
| 2047 | lastbf = bf->bf_lastbf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2048 | ds = lastbf->bf_desc; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2049 | |
| 2050 | status = ath9k_hw_txprocdesc(ah, ds); |
| 2051 | if (status == -EINPROGRESS) { |
| 2052 | spin_unlock_bh(&txq->axq_lock); |
| 2053 | break; |
| 2054 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2055 | |
| 2056 | /* |
Luis R. Rodriguez | e7824a5 | 2009-11-24 02:53:25 -0500 | [diff] [blame] | 2057 | * We now know the nullfunc frame has been ACKed so we |
| 2058 | * can disable RX. |
| 2059 | */ |
| 2060 | if (bf->bf_isnullfunc && |
| 2061 | (ds->ds_txstat.ts_status & ATH9K_TX_ACKED)) { |
| 2062 | if ((sc->sc_flags & SC_OP_PS_ENABLED)) { |
| 2063 | sc->ps_enabled = true; |
| 2064 | ath9k_hw_setrxabort(sc->sc_ah, 1); |
| 2065 | } else |
| 2066 | sc->sc_flags |= SC_OP_NULLFUNC_COMPLETED; |
| 2067 | } |
| 2068 | |
| 2069 | /* |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2070 | * Remove ath_buf's of the same transmit unit from txq, |
| 2071 | * however leave the last descriptor back as the holding |
| 2072 | * descriptor for hw. |
| 2073 | */ |
Sujith | a119cc4 | 2009-03-30 15:28:38 +0530 | [diff] [blame] | 2074 | lastbf->bf_stale = true; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2075 | INIT_LIST_HEAD(&bf_head); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2076 | if (!list_is_singular(&lastbf->list)) |
| 2077 | list_cut_position(&bf_head, |
| 2078 | &txq->axq_q, lastbf->list.prev); |
| 2079 | |
| 2080 | txq->axq_depth--; |
Felix Fietkau | 815833e | 2009-12-05 18:08:05 +0100 | [diff] [blame] | 2081 | txok = !(ds->ds_txstat.ts_status & ATH9K_TXERR_FILT); |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 2082 | txq->axq_tx_inprogress = false; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2083 | spin_unlock_bh(&txq->axq_lock); |
| 2084 | |
| 2085 | if (bf_held) { |
Sujith | b77f483 | 2008-12-07 21:44:03 +0530 | [diff] [blame] | 2086 | spin_lock_bh(&sc->tx.txbuflock); |
Sujith | 6ef9b13 | 2009-01-16 21:38:51 +0530 | [diff] [blame] | 2087 | list_move_tail(&bf_held->list, &sc->tx.txbuf); |
Sujith | b77f483 | 2008-12-07 21:44:03 +0530 | [diff] [blame] | 2088 | spin_unlock_bh(&sc->tx.txbuflock); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2089 | } |
| 2090 | |
Sujith | cd3d39a | 2008-08-11 14:03:34 +0530 | [diff] [blame] | 2091 | if (!bf_isampdu(bf)) { |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2092 | /* |
| 2093 | * This frame is sent out as a single frame. |
| 2094 | * Use hardware retry status for this frame. |
| 2095 | */ |
| 2096 | bf->bf_retries = ds->ds_txstat.ts_longretry; |
| 2097 | if (ds->ds_txstat.ts_status & ATH9K_TXERR_XRETRY) |
Sujith | cd3d39a | 2008-08-11 14:03:34 +0530 | [diff] [blame] | 2098 | bf->bf_state.bf_type |= BUF_XRETRY; |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 2099 | ath_tx_rc_status(bf, ds, 0, txok, true); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2100 | } |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 2101 | |
Sujith | cd3d39a | 2008-08-11 14:03:34 +0530 | [diff] [blame] | 2102 | if (bf_isampdu(bf)) |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 2103 | ath_tx_complete_aggr(sc, txq, bf, &bf_head, txok); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2104 | else |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 2105 | ath_tx_complete_buf(sc, bf, txq, &bf_head, txok, 0); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2106 | |
Sujith | 059d806 | 2009-01-16 21:38:49 +0530 | [diff] [blame] | 2107 | ath_wake_mac80211_queue(sc, txq); |
| 2108 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2109 | spin_lock_bh(&txq->axq_lock); |
Sujith | 672840a | 2008-08-11 14:05:08 +0530 | [diff] [blame] | 2110 | if (sc->sc_flags & SC_OP_TXAGGR) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2111 | ath_txq_schedule(sc, txq); |
| 2112 | spin_unlock_bh(&txq->axq_lock); |
| 2113 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2114 | } |
| 2115 | |
Sujith | 305fe47 | 2009-07-23 15:32:29 +0530 | [diff] [blame] | 2116 | static void ath_tx_complete_poll_work(struct work_struct *work) |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 2117 | { |
| 2118 | struct ath_softc *sc = container_of(work, struct ath_softc, |
| 2119 | tx_complete_work.work); |
| 2120 | struct ath_txq *txq; |
| 2121 | int i; |
| 2122 | bool needreset = false; |
| 2123 | |
| 2124 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) |
| 2125 | if (ATH_TXQ_SETUP(sc, i)) { |
| 2126 | txq = &sc->tx.txq[i]; |
| 2127 | spin_lock_bh(&txq->axq_lock); |
| 2128 | if (txq->axq_depth) { |
| 2129 | if (txq->axq_tx_inprogress) { |
| 2130 | needreset = true; |
| 2131 | spin_unlock_bh(&txq->axq_lock); |
| 2132 | break; |
| 2133 | } else { |
| 2134 | txq->axq_tx_inprogress = true; |
| 2135 | } |
| 2136 | } |
| 2137 | spin_unlock_bh(&txq->axq_lock); |
| 2138 | } |
| 2139 | |
| 2140 | if (needreset) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 2141 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_RESET, |
| 2142 | "tx hung, resetting the chip\n"); |
Sujith | 332c556 | 2009-10-09 09:51:28 +0530 | [diff] [blame] | 2143 | ath9k_ps_wakeup(sc); |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 2144 | ath_reset(sc, false); |
Sujith | 332c556 | 2009-10-09 09:51:28 +0530 | [diff] [blame] | 2145 | ath9k_ps_restore(sc); |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 2146 | } |
| 2147 | |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 2148 | ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 2149 | msecs_to_jiffies(ATH_TX_COMPLETE_POLL_INT)); |
| 2150 | } |
| 2151 | |
| 2152 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2153 | |
| 2154 | void ath_tx_tasklet(struct ath_softc *sc) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2155 | { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2156 | int i; |
| 2157 | u32 qcumask = ((1 << ATH9K_NUM_TX_QUEUES) - 1); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2158 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2159 | ath9k_hw_gettxintrtxqs(sc->sc_ah, &qcumask); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2160 | |
| 2161 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2162 | if (ATH_TXQ_SETUP(sc, i) && (qcumask & (1 << i))) |
| 2163 | ath_tx_processq(sc, &sc->tx.txq[i]); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2164 | } |
| 2165 | } |
| 2166 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2167 | /*****************/ |
| 2168 | /* Init, Cleanup */ |
| 2169 | /*****************/ |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2170 | |
| 2171 | int ath_tx_init(struct ath_softc *sc, int nbufs) |
| 2172 | { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 2173 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2174 | int error = 0; |
| 2175 | |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2176 | spin_lock_init(&sc->tx.txbuflock); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2177 | |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2178 | error = ath_descdma_setup(sc, &sc->tx.txdma, &sc->tx.txbuf, |
| 2179 | "tx", nbufs, 1); |
| 2180 | if (error != 0) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 2181 | ath_print(common, ATH_DBG_FATAL, |
| 2182 | "Failed to allocate tx descriptors: %d\n", error); |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2183 | goto err; |
| 2184 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2185 | |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2186 | error = ath_descdma_setup(sc, &sc->beacon.bdma, &sc->beacon.bbuf, |
| 2187 | "beacon", ATH_BCBUF, 1); |
| 2188 | if (error != 0) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 2189 | ath_print(common, ATH_DBG_FATAL, |
| 2190 | "Failed to allocate beacon descriptors: %d\n", error); |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2191 | goto err; |
| 2192 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2193 | |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 2194 | INIT_DELAYED_WORK(&sc->tx_complete_work, ath_tx_complete_poll_work); |
| 2195 | |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2196 | err: |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2197 | if (error != 0) |
| 2198 | ath_tx_cleanup(sc); |
| 2199 | |
| 2200 | return error; |
| 2201 | } |
| 2202 | |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2203 | void ath_tx_cleanup(struct ath_softc *sc) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2204 | { |
Sujith | b77f483 | 2008-12-07 21:44:03 +0530 | [diff] [blame] | 2205 | if (sc->beacon.bdma.dd_desc_len != 0) |
| 2206 | ath_descdma_cleanup(sc, &sc->beacon.bdma, &sc->beacon.bbuf); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2207 | |
Sujith | b77f483 | 2008-12-07 21:44:03 +0530 | [diff] [blame] | 2208 | if (sc->tx.txdma.dd_desc_len != 0) |
| 2209 | ath_descdma_cleanup(sc, &sc->tx.txdma, &sc->tx.txbuf); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2210 | } |
| 2211 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2212 | void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an) |
| 2213 | { |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2214 | struct ath_atx_tid *tid; |
| 2215 | struct ath_atx_ac *ac; |
| 2216 | int tidno, acno; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2217 | |
Sujith | 8ee5afb | 2008-12-07 21:43:36 +0530 | [diff] [blame] | 2218 | for (tidno = 0, tid = &an->tid[tidno]; |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2219 | tidno < WME_NUM_TID; |
| 2220 | tidno++, tid++) { |
| 2221 | tid->an = an; |
| 2222 | tid->tidno = tidno; |
| 2223 | tid->seq_start = tid->seq_next = 0; |
| 2224 | tid->baw_size = WME_MAX_BA; |
| 2225 | tid->baw_head = tid->baw_tail = 0; |
| 2226 | tid->sched = false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2227 | tid->paused = false; |
Sujith | a37c2c7 | 2008-10-29 10:15:40 +0530 | [diff] [blame] | 2228 | tid->state &= ~AGGR_CLEANUP; |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2229 | INIT_LIST_HEAD(&tid->buf_q); |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2230 | acno = TID_TO_WME_AC(tidno); |
Sujith | 8ee5afb | 2008-12-07 21:43:36 +0530 | [diff] [blame] | 2231 | tid->ac = &an->ac[acno]; |
Sujith | a37c2c7 | 2008-10-29 10:15:40 +0530 | [diff] [blame] | 2232 | tid->state &= ~AGGR_ADDBA_COMPLETE; |
| 2233 | tid->state &= ~AGGR_ADDBA_PROGRESS; |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2234 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2235 | |
Sujith | 8ee5afb | 2008-12-07 21:43:36 +0530 | [diff] [blame] | 2236 | for (acno = 0, ac = &an->ac[acno]; |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2237 | acno < WME_NUM_AC; acno++, ac++) { |
| 2238 | ac->sched = false; |
| 2239 | INIT_LIST_HEAD(&ac->tid_q); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2240 | |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2241 | switch (acno) { |
| 2242 | case WME_AC_BE: |
| 2243 | ac->qnum = ath_tx_get_qnum(sc, |
| 2244 | ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_BE); |
| 2245 | break; |
| 2246 | case WME_AC_BK: |
| 2247 | ac->qnum = ath_tx_get_qnum(sc, |
| 2248 | ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_BK); |
| 2249 | break; |
| 2250 | case WME_AC_VI: |
| 2251 | ac->qnum = ath_tx_get_qnum(sc, |
| 2252 | ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_VI); |
| 2253 | break; |
| 2254 | case WME_AC_VO: |
| 2255 | ac->qnum = ath_tx_get_qnum(sc, |
| 2256 | ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_VO); |
| 2257 | break; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2258 | } |
| 2259 | } |
| 2260 | } |
| 2261 | |
Sujith | b5aa9bf | 2008-10-29 10:13:31 +0530 | [diff] [blame] | 2262 | 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] | 2263 | { |
| 2264 | int i; |
| 2265 | struct ath_atx_ac *ac, *ac_tmp; |
| 2266 | struct ath_atx_tid *tid, *tid_tmp; |
| 2267 | struct ath_txq *txq; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2268 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2269 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { |
| 2270 | if (ATH_TXQ_SETUP(sc, i)) { |
Sujith | b77f483 | 2008-12-07 21:44:03 +0530 | [diff] [blame] | 2271 | txq = &sc->tx.txq[i]; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2272 | |
Sujith | b5aa9bf | 2008-10-29 10:13:31 +0530 | [diff] [blame] | 2273 | spin_lock(&txq->axq_lock); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2274 | |
| 2275 | list_for_each_entry_safe(ac, |
| 2276 | ac_tmp, &txq->axq_acq, list) { |
| 2277 | tid = list_first_entry(&ac->tid_q, |
| 2278 | struct ath_atx_tid, list); |
| 2279 | if (tid && tid->an != an) |
| 2280 | continue; |
| 2281 | list_del(&ac->list); |
| 2282 | ac->sched = false; |
| 2283 | |
| 2284 | list_for_each_entry_safe(tid, |
| 2285 | tid_tmp, &ac->tid_q, list) { |
| 2286 | list_del(&tid->list); |
| 2287 | tid->sched = false; |
Sujith | b5aa9bf | 2008-10-29 10:13:31 +0530 | [diff] [blame] | 2288 | ath_tid_drain(sc, txq, tid); |
Sujith | a37c2c7 | 2008-10-29 10:15:40 +0530 | [diff] [blame] | 2289 | tid->state &= ~AGGR_ADDBA_COMPLETE; |
Sujith | a37c2c7 | 2008-10-29 10:15:40 +0530 | [diff] [blame] | 2290 | tid->state &= ~AGGR_CLEANUP; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2291 | } |
| 2292 | } |
| 2293 | |
Sujith | b5aa9bf | 2008-10-29 10:13:31 +0530 | [diff] [blame] | 2294 | spin_unlock(&txq->axq_lock); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2295 | } |
| 2296 | } |
| 2297 | } |