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 | b622a72 | 2010-04-15 17:39:28 -0400 | [diff] [blame] | 18 | #include "ar9003_mac.h" |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 19 | |
| 20 | #define BITS_PER_BYTE 8 |
| 21 | #define OFDM_PLCP_BITS 22 |
Felix Fietkau | 7817e4c | 2010-04-19 19:57:31 +0200 | [diff] [blame] | 22 | #define HT_RC_2_MCS(_rc) ((_rc) & 0x1f) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 23 | #define HT_RC_2_STREAMS(_rc) ((((_rc) & 0x78) >> 3) + 1) |
| 24 | #define L_STF 8 |
| 25 | #define L_LTF 8 |
| 26 | #define L_SIG 4 |
| 27 | #define HT_SIG 8 |
| 28 | #define HT_STF 4 |
| 29 | #define HT_LTF(_ns) (4 * (_ns)) |
| 30 | #define SYMBOL_TIME(_ns) ((_ns) << 2) /* ns * 4 us */ |
| 31 | #define SYMBOL_TIME_HALFGI(_ns) (((_ns) * 18 + 4) / 5) /* ns * 3.6 us */ |
| 32 | #define NUM_SYMBOLS_PER_USEC(_usec) (_usec >> 2) |
| 33 | #define NUM_SYMBOLS_PER_USEC_HALFGI(_usec) (((_usec*5)-4)/18) |
| 34 | |
| 35 | #define OFDM_SIFS_TIME 16 |
| 36 | |
Felix Fietkau | c666387 | 2010-04-19 19:57:33 +0200 | [diff] [blame] | 37 | static u16 bits_per_symbol[][2] = { |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 38 | /* 20MHz 40MHz */ |
| 39 | { 26, 54 }, /* 0: BPSK */ |
| 40 | { 52, 108 }, /* 1: QPSK 1/2 */ |
| 41 | { 78, 162 }, /* 2: QPSK 3/4 */ |
| 42 | { 104, 216 }, /* 3: 16-QAM 1/2 */ |
| 43 | { 156, 324 }, /* 4: 16-QAM 3/4 */ |
| 44 | { 208, 432 }, /* 5: 64-QAM 2/3 */ |
| 45 | { 234, 486 }, /* 6: 64-QAM 3/4 */ |
| 46 | { 260, 540 }, /* 7: 64-QAM 5/6 */ |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 47 | }; |
| 48 | |
| 49 | #define IS_HT_RATE(_rate) ((_rate) & 0x80) |
| 50 | |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 51 | static void ath_tx_send_ht_normal(struct ath_softc *sc, struct ath_txq *txq, |
| 52 | struct ath_atx_tid *tid, |
| 53 | struct list_head *bf_head); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 54 | static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 55 | struct ath_txq *txq, struct list_head *bf_q, |
| 56 | struct ath_tx_status *ts, int txok, int sendbar); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 57 | static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, |
| 58 | struct list_head *head); |
| 59 | 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] | 60 | static int ath_tx_num_badfrms(struct ath_softc *sc, struct ath_buf *bf, |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 61 | struct ath_tx_status *ts, int txok); |
| 62 | static void ath_tx_rc_status(struct ath_buf *bf, struct ath_tx_status *ts, |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 63 | int nbad, int txok, bool update_rc); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 64 | |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 65 | enum { |
Felix Fietkau | 0e668cd | 2010-04-19 19:57:32 +0200 | [diff] [blame] | 66 | MCS_HT20, |
| 67 | MCS_HT20_SGI, |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 68 | MCS_HT40, |
| 69 | MCS_HT40_SGI, |
| 70 | }; |
| 71 | |
Felix Fietkau | 0e668cd | 2010-04-19 19:57:32 +0200 | [diff] [blame] | 72 | static int ath_max_4ms_framelen[4][32] = { |
| 73 | [MCS_HT20] = { |
| 74 | 3212, 6432, 9648, 12864, 19300, 25736, 28952, 32172, |
| 75 | 6424, 12852, 19280, 25708, 38568, 51424, 57852, 64280, |
| 76 | 9628, 19260, 28896, 38528, 57792, 65532, 65532, 65532, |
| 77 | 12828, 25656, 38488, 51320, 65532, 65532, 65532, 65532, |
| 78 | }, |
| 79 | [MCS_HT20_SGI] = { |
| 80 | 3572, 7144, 10720, 14296, 21444, 28596, 32172, 35744, |
| 81 | 7140, 14284, 21428, 28568, 42856, 57144, 64288, 65532, |
| 82 | 10700, 21408, 32112, 42816, 64228, 65532, 65532, 65532, |
| 83 | 14256, 28516, 42780, 57040, 65532, 65532, 65532, 65532, |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 84 | }, |
| 85 | [MCS_HT40] = { |
Felix Fietkau | 0e668cd | 2010-04-19 19:57:32 +0200 | [diff] [blame] | 86 | 6680, 13360, 20044, 26724, 40092, 53456, 60140, 65532, |
| 87 | 13348, 26700, 40052, 53400, 65532, 65532, 65532, 65532, |
| 88 | 20004, 40008, 60016, 65532, 65532, 65532, 65532, 65532, |
| 89 | 26644, 53292, 65532, 65532, 65532, 65532, 65532, 65532, |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 90 | }, |
| 91 | [MCS_HT40_SGI] = { |
Felix Fietkau | 0e668cd | 2010-04-19 19:57:32 +0200 | [diff] [blame] | 92 | 7420, 14844, 22272, 29696, 44544, 59396, 65532, 65532, |
| 93 | 14832, 29668, 44504, 59340, 65532, 65532, 65532, 65532, |
| 94 | 22232, 44464, 65532, 65532, 65532, 65532, 65532, 65532, |
| 95 | 29616, 59232, 65532, 65532, 65532, 65532, 65532, 65532, |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 96 | } |
| 97 | }; |
| 98 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 99 | /*********************/ |
| 100 | /* Aggregation logic */ |
| 101 | /*********************/ |
| 102 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 103 | static void ath_tx_queue_tid(struct ath_txq *txq, struct ath_atx_tid *tid) |
| 104 | { |
| 105 | struct ath_atx_ac *ac = tid->ac; |
| 106 | |
| 107 | if (tid->paused) |
| 108 | return; |
| 109 | |
| 110 | if (tid->sched) |
| 111 | return; |
| 112 | |
| 113 | tid->sched = true; |
| 114 | list_add_tail(&tid->list, &ac->tid_q); |
| 115 | |
| 116 | if (ac->sched) |
| 117 | return; |
| 118 | |
| 119 | ac->sched = true; |
| 120 | list_add_tail(&ac->list, &txq->axq_acq); |
| 121 | } |
| 122 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 123 | static void ath_tx_resume_tid(struct ath_softc *sc, struct ath_atx_tid *tid) |
| 124 | { |
| 125 | struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum]; |
| 126 | |
Lorenzo Bianconi | 7540184 | 2010-08-01 15:47:32 +0200 | [diff] [blame] | 127 | WARN_ON(!tid->paused); |
| 128 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 129 | spin_lock_bh(&txq->axq_lock); |
Lorenzo Bianconi | 7540184 | 2010-08-01 15:47:32 +0200 | [diff] [blame] | 130 | tid->paused = false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 131 | |
| 132 | if (list_empty(&tid->buf_q)) |
| 133 | goto unlock; |
| 134 | |
| 135 | ath_tx_queue_tid(txq, tid); |
| 136 | ath_txq_schedule(sc, txq); |
| 137 | unlock: |
| 138 | spin_unlock_bh(&txq->axq_lock); |
| 139 | } |
| 140 | |
| 141 | static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid) |
| 142 | { |
| 143 | struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum]; |
| 144 | struct ath_buf *bf; |
| 145 | struct list_head bf_head; |
| 146 | INIT_LIST_HEAD(&bf_head); |
| 147 | |
Lorenzo Bianconi | 7540184 | 2010-08-01 15:47:32 +0200 | [diff] [blame] | 148 | WARN_ON(!tid->paused); |
| 149 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 150 | spin_lock_bh(&txq->axq_lock); |
Lorenzo Bianconi | 7540184 | 2010-08-01 15:47:32 +0200 | [diff] [blame] | 151 | tid->paused = false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 152 | |
| 153 | while (!list_empty(&tid->buf_q)) { |
| 154 | bf = list_first_entry(&tid->buf_q, struct ath_buf, list); |
Luis R. Rodriguez | 9680e8a | 2009-09-13 23:28:00 -0700 | [diff] [blame] | 155 | BUG_ON(bf_isretried(bf)); |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 156 | list_move_tail(&bf->list, &bf_head); |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 157 | ath_tx_send_ht_normal(sc, txq, tid, &bf_head); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 158 | } |
| 159 | |
| 160 | spin_unlock_bh(&txq->axq_lock); |
| 161 | } |
| 162 | |
| 163 | static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid, |
| 164 | int seqno) |
| 165 | { |
| 166 | int index, cindex; |
| 167 | |
| 168 | index = ATH_BA_INDEX(tid->seq_start, seqno); |
| 169 | cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); |
| 170 | |
Felix Fietkau | 81ee13b | 2010-09-20 13:45:36 +0200 | [diff] [blame^] | 171 | __clear_bit(cindex, tid->tx_buf); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 172 | |
Felix Fietkau | 81ee13b | 2010-09-20 13:45:36 +0200 | [diff] [blame^] | 173 | while (tid->baw_head != tid->baw_tail && !test_bit(tid->baw_head, tid->tx_buf)) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 174 | INCR(tid->seq_start, IEEE80211_SEQ_MAX); |
| 175 | INCR(tid->baw_head, ATH_TID_MAX_BUFS); |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | static void ath_tx_addto_baw(struct ath_softc *sc, struct ath_atx_tid *tid, |
| 180 | struct ath_buf *bf) |
| 181 | { |
| 182 | int index, cindex; |
| 183 | |
| 184 | if (bf_isretried(bf)) |
| 185 | return; |
| 186 | |
| 187 | index = ATH_BA_INDEX(tid->seq_start, bf->bf_seqno); |
| 188 | cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); |
Felix Fietkau | 81ee13b | 2010-09-20 13:45:36 +0200 | [diff] [blame^] | 189 | __set_bit(cindex, tid->tx_buf); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 190 | |
| 191 | if (index >= ((tid->baw_tail - tid->baw_head) & |
| 192 | (ATH_TID_MAX_BUFS - 1))) { |
| 193 | tid->baw_tail = cindex; |
| 194 | INCR(tid->baw_tail, ATH_TID_MAX_BUFS); |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | /* |
| 199 | * TODO: For frame(s) that are in the retry state, we will reuse the |
| 200 | * sequence number(s) without setting the retry bit. The |
| 201 | * alternative is to give up on these and BAR the receiver's window |
| 202 | * forward. |
| 203 | */ |
| 204 | static void ath_tid_drain(struct ath_softc *sc, struct ath_txq *txq, |
| 205 | struct ath_atx_tid *tid) |
| 206 | |
| 207 | { |
| 208 | struct ath_buf *bf; |
| 209 | struct list_head bf_head; |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 210 | struct ath_tx_status ts; |
| 211 | |
| 212 | memset(&ts, 0, sizeof(ts)); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 213 | INIT_LIST_HEAD(&bf_head); |
| 214 | |
| 215 | for (;;) { |
| 216 | if (list_empty(&tid->buf_q)) |
| 217 | break; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 218 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 219 | bf = list_first_entry(&tid->buf_q, struct ath_buf, list); |
| 220 | list_move_tail(&bf->list, &bf_head); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 221 | |
| 222 | if (bf_isretried(bf)) |
| 223 | ath_tx_update_baw(sc, tid, bf->bf_seqno); |
| 224 | |
| 225 | spin_unlock(&txq->axq_lock); |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 226 | ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 0); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 227 | spin_lock(&txq->axq_lock); |
| 228 | } |
| 229 | |
| 230 | tid->seq_next = tid->seq_start; |
| 231 | tid->baw_tail = tid->baw_head; |
| 232 | } |
| 233 | |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 234 | static void ath_tx_set_retry(struct ath_softc *sc, struct ath_txq *txq, |
| 235 | struct ath_buf *bf) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 236 | { |
| 237 | struct sk_buff *skb; |
| 238 | struct ieee80211_hdr *hdr; |
| 239 | |
| 240 | bf->bf_state.bf_type |= BUF_RETRY; |
| 241 | bf->bf_retries++; |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 242 | TX_STAT_INC(txq->axq_qnum, a_retries); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 243 | |
| 244 | skb = bf->bf_mpdu; |
| 245 | hdr = (struct ieee80211_hdr *)skb->data; |
| 246 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_RETRY); |
| 247 | } |
| 248 | |
Felix Fietkau | 0a8cea8 | 2010-04-19 19:57:30 +0200 | [diff] [blame] | 249 | static struct ath_buf *ath_tx_get_buffer(struct ath_softc *sc) |
| 250 | { |
| 251 | struct ath_buf *bf = NULL; |
| 252 | |
| 253 | spin_lock_bh(&sc->tx.txbuflock); |
| 254 | |
| 255 | if (unlikely(list_empty(&sc->tx.txbuf))) { |
| 256 | spin_unlock_bh(&sc->tx.txbuflock); |
| 257 | return NULL; |
| 258 | } |
| 259 | |
| 260 | bf = list_first_entry(&sc->tx.txbuf, struct ath_buf, list); |
| 261 | list_del(&bf->list); |
| 262 | |
| 263 | spin_unlock_bh(&sc->tx.txbuflock); |
| 264 | |
| 265 | return bf; |
| 266 | } |
| 267 | |
| 268 | static void ath_tx_return_buffer(struct ath_softc *sc, struct ath_buf *bf) |
| 269 | { |
| 270 | spin_lock_bh(&sc->tx.txbuflock); |
| 271 | list_add_tail(&bf->list, &sc->tx.txbuf); |
| 272 | spin_unlock_bh(&sc->tx.txbuflock); |
| 273 | } |
| 274 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 275 | static struct ath_buf* ath_clone_txbuf(struct ath_softc *sc, struct ath_buf *bf) |
| 276 | { |
| 277 | struct ath_buf *tbf; |
| 278 | |
Felix Fietkau | 0a8cea8 | 2010-04-19 19:57:30 +0200 | [diff] [blame] | 279 | tbf = ath_tx_get_buffer(sc); |
| 280 | if (WARN_ON(!tbf)) |
Vasanthakumar Thiagarajan | 8a46097 | 2009-06-10 17:50:09 +0530 | [diff] [blame] | 281 | return NULL; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 282 | |
| 283 | ATH_TXBUF_RESET(tbf); |
| 284 | |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 285 | tbf->aphy = bf->aphy; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 286 | tbf->bf_mpdu = bf->bf_mpdu; |
| 287 | tbf->bf_buf_addr = bf->bf_buf_addr; |
Vasanthakumar Thiagarajan | d826c83 | 2010-04-15 17:38:45 -0400 | [diff] [blame] | 288 | memcpy(tbf->bf_desc, bf->bf_desc, sc->sc_ah->caps.tx_desc_len); |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 289 | tbf->bf_state = bf->bf_state; |
| 290 | tbf->bf_dmacontext = bf->bf_dmacontext; |
| 291 | |
| 292 | return tbf; |
| 293 | } |
| 294 | |
| 295 | static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq, |
| 296 | struct ath_buf *bf, struct list_head *bf_q, |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 297 | struct ath_tx_status *ts, int txok) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 298 | { |
| 299 | struct ath_node *an = NULL; |
| 300 | struct sk_buff *skb; |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 301 | struct ieee80211_sta *sta; |
Luis R. Rodriguez | 76d5a9e | 2009-11-02 16:08:34 -0800 | [diff] [blame] | 302 | struct ieee80211_hw *hw; |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 303 | struct ieee80211_hdr *hdr; |
Luis R. Rodriguez | 76d5a9e | 2009-11-02 16:08:34 -0800 | [diff] [blame] | 304 | struct ieee80211_tx_info *tx_info; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 305 | struct ath_atx_tid *tid = NULL; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 306 | struct ath_buf *bf_next, *bf_last = bf->bf_lastbf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 307 | struct list_head bf_head, bf_pending; |
Vasanthakumar Thiagarajan | 0934af2 | 2009-03-18 20:22:00 +0530 | [diff] [blame] | 308 | u16 seq_st = 0, acked_cnt = 0, txfail_cnt = 0; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 309 | u32 ba[WME_BA_BMP_SIZE >> 5]; |
Vasanthakumar Thiagarajan | 0934af2 | 2009-03-18 20:22:00 +0530 | [diff] [blame] | 310 | int isaggr, txfail, txpending, sendbar = 0, needreset = 0, nbad = 0; |
| 311 | bool rc_update = true; |
Felix Fietkau | 78c4653 | 2010-06-25 01:26:16 +0200 | [diff] [blame] | 312 | struct ieee80211_tx_rate rates[4]; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 313 | |
Sujith | a22be22 | 2009-03-30 15:28:36 +0530 | [diff] [blame] | 314 | skb = bf->bf_mpdu; |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 315 | hdr = (struct ieee80211_hdr *)skb->data; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 316 | |
Luis R. Rodriguez | 76d5a9e | 2009-11-02 16:08:34 -0800 | [diff] [blame] | 317 | tx_info = IEEE80211_SKB_CB(skb); |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 318 | hw = bf->aphy->hw; |
Luis R. Rodriguez | 76d5a9e | 2009-11-02 16:08:34 -0800 | [diff] [blame] | 319 | |
Felix Fietkau | 78c4653 | 2010-06-25 01:26:16 +0200 | [diff] [blame] | 320 | memcpy(rates, tx_info->control.rates, sizeof(rates)); |
| 321 | |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 322 | rcu_read_lock(); |
| 323 | |
Johannes Berg | 5ed176e | 2009-11-04 14:42:28 +0100 | [diff] [blame] | 324 | /* XXX: use ieee80211_find_sta! */ |
Luis R. Rodriguez | 76d5a9e | 2009-11-02 16:08:34 -0800 | [diff] [blame] | 325 | sta = ieee80211_find_sta_by_hw(hw, hdr->addr1); |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 326 | if (!sta) { |
| 327 | rcu_read_unlock(); |
Felix Fietkau | 73e1946 | 2010-07-07 19:42:09 +0200 | [diff] [blame] | 328 | |
Felix Fietkau | 31e79a5 | 2010-07-12 23:16:34 +0200 | [diff] [blame] | 329 | INIT_LIST_HEAD(&bf_head); |
| 330 | while (bf) { |
| 331 | bf_next = bf->bf_next; |
| 332 | |
| 333 | bf->bf_state.bf_type |= BUF_XRETRY; |
| 334 | if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) || |
| 335 | !bf->bf_stale || bf_next != NULL) |
| 336 | list_move_tail(&bf->list, &bf_head); |
| 337 | |
| 338 | ath_tx_rc_status(bf, ts, 0, 0, false); |
| 339 | ath_tx_complete_buf(sc, bf, txq, &bf_head, ts, |
| 340 | 0, 0); |
| 341 | |
| 342 | bf = bf_next; |
| 343 | } |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 344 | return; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 345 | } |
| 346 | |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 347 | an = (struct ath_node *)sta->drv_priv; |
| 348 | tid = ATH_AN_2_TID(an, bf->bf_tidno); |
| 349 | |
Felix Fietkau | b11b160 | 2010-07-11 12:48:44 +0200 | [diff] [blame] | 350 | /* |
| 351 | * The hardware occasionally sends a tx status for the wrong TID. |
| 352 | * In this case, the BA status cannot be considered valid and all |
| 353 | * subframes need to be retransmitted |
| 354 | */ |
| 355 | if (bf->bf_tidno != ts->tid) |
| 356 | txok = false; |
| 357 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 358 | isaggr = bf_isaggr(bf); |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 359 | memset(ba, 0, WME_BA_BMP_SIZE >> 3); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 360 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 361 | if (isaggr && txok) { |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 362 | if (ts->ts_flags & ATH9K_TX_BA) { |
| 363 | seq_st = ts->ts_seqnum; |
| 364 | memcpy(ba, &ts->ba_low, WME_BA_BMP_SIZE >> 3); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 365 | } else { |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 366 | /* |
| 367 | * AR5416 can become deaf/mute when BA |
| 368 | * issue happens. Chip needs to be reset. |
| 369 | * But AP code may have sychronization issues |
| 370 | * when perform internal reset in this routine. |
| 371 | * Only enable reset in STA mode for now. |
| 372 | */ |
Sujith | 2660b81 | 2009-02-09 13:27:26 +0530 | [diff] [blame] | 373 | if (sc->sc_ah->opmode == NL80211_IFTYPE_STATION) |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 374 | needreset = 1; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 375 | } |
| 376 | } |
| 377 | |
| 378 | INIT_LIST_HEAD(&bf_pending); |
| 379 | INIT_LIST_HEAD(&bf_head); |
| 380 | |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 381 | nbad = ath_tx_num_badfrms(sc, bf, ts, txok); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 382 | while (bf) { |
| 383 | txfail = txpending = 0; |
| 384 | bf_next = bf->bf_next; |
| 385 | |
Felix Fietkau | 78c4653 | 2010-06-25 01:26:16 +0200 | [diff] [blame] | 386 | skb = bf->bf_mpdu; |
| 387 | tx_info = IEEE80211_SKB_CB(skb); |
| 388 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 389 | if (ATH_BA_ISSET(ba, ATH_BA_INDEX(seq_st, bf->bf_seqno))) { |
| 390 | /* transmit completion, subframe is |
| 391 | * acked by block ack */ |
Vasanthakumar Thiagarajan | 0934af2 | 2009-03-18 20:22:00 +0530 | [diff] [blame] | 392 | acked_cnt++; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 393 | } else if (!isaggr && txok) { |
| 394 | /* transmit completion */ |
Vasanthakumar Thiagarajan | 0934af2 | 2009-03-18 20:22:00 +0530 | [diff] [blame] | 395 | acked_cnt++; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 396 | } else { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 397 | if (!(tid->state & AGGR_CLEANUP) && |
Vasanthakumar Thiagarajan | 6d913f7 | 2010-04-15 17:38:46 -0400 | [diff] [blame] | 398 | !bf_last->bf_tx_aborted) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 399 | if (bf->bf_retries < ATH_MAX_SW_RETRIES) { |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 400 | ath_tx_set_retry(sc, txq, bf); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 401 | txpending = 1; |
| 402 | } else { |
| 403 | bf->bf_state.bf_type |= BUF_XRETRY; |
| 404 | txfail = 1; |
| 405 | sendbar = 1; |
Vasanthakumar Thiagarajan | 0934af2 | 2009-03-18 20:22:00 +0530 | [diff] [blame] | 406 | txfail_cnt++; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 407 | } |
| 408 | } else { |
| 409 | /* |
| 410 | * cleanup in progress, just fail |
| 411 | * the un-acked sub-frames |
| 412 | */ |
| 413 | txfail = 1; |
| 414 | } |
| 415 | } |
| 416 | |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 417 | if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) && |
| 418 | bf_next == NULL) { |
Vasanthakumar Thiagarajan | cbfe89c | 2009-06-24 18:58:47 +0530 | [diff] [blame] | 419 | /* |
| 420 | * Make sure the last desc is reclaimed if it |
| 421 | * not a holding desc. |
| 422 | */ |
| 423 | if (!bf_last->bf_stale) |
| 424 | list_move_tail(&bf->list, &bf_head); |
| 425 | else |
| 426 | INIT_LIST_HEAD(&bf_head); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 427 | } else { |
Luis R. Rodriguez | 9680e8a | 2009-09-13 23:28:00 -0700 | [diff] [blame] | 428 | BUG_ON(list_empty(bf_q)); |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 429 | list_move_tail(&bf->list, &bf_head); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 430 | } |
| 431 | |
| 432 | if (!txpending) { |
| 433 | /* |
| 434 | * complete the acked-ones/xretried ones; update |
| 435 | * block-ack window |
| 436 | */ |
| 437 | spin_lock_bh(&txq->axq_lock); |
| 438 | ath_tx_update_baw(sc, tid, bf->bf_seqno); |
| 439 | spin_unlock_bh(&txq->axq_lock); |
| 440 | |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 441 | if (rc_update && (acked_cnt == 1 || txfail_cnt == 1)) { |
Felix Fietkau | 78c4653 | 2010-06-25 01:26:16 +0200 | [diff] [blame] | 442 | memcpy(tx_info->control.rates, rates, sizeof(rates)); |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 443 | ath_tx_rc_status(bf, ts, nbad, txok, true); |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 444 | rc_update = false; |
| 445 | } else { |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 446 | ath_tx_rc_status(bf, ts, nbad, txok, false); |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 447 | } |
| 448 | |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 449 | ath_tx_complete_buf(sc, bf, txq, &bf_head, ts, |
| 450 | !txfail, sendbar); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 451 | } else { |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 452 | /* retry the un-acked ones */ |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 453 | if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)) { |
| 454 | if (bf->bf_next == NULL && bf_last->bf_stale) { |
| 455 | struct ath_buf *tbf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 456 | |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 457 | tbf = ath_clone_txbuf(sc, bf_last); |
| 458 | /* |
| 459 | * Update tx baw and complete the |
| 460 | * frame with failed status if we |
| 461 | * run out of tx buf. |
| 462 | */ |
| 463 | if (!tbf) { |
| 464 | spin_lock_bh(&txq->axq_lock); |
| 465 | ath_tx_update_baw(sc, tid, |
| 466 | bf->bf_seqno); |
| 467 | spin_unlock_bh(&txq->axq_lock); |
Vasanthakumar Thiagarajan | c41d92d | 2009-07-14 20:17:11 -0400 | [diff] [blame] | 468 | |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 469 | bf->bf_state.bf_type |= |
| 470 | BUF_XRETRY; |
| 471 | ath_tx_rc_status(bf, ts, nbad, |
| 472 | 0, false); |
| 473 | ath_tx_complete_buf(sc, bf, txq, |
| 474 | &bf_head, |
| 475 | ts, 0, 0); |
| 476 | break; |
| 477 | } |
| 478 | |
| 479 | ath9k_hw_cleartxdesc(sc->sc_ah, |
| 480 | tbf->bf_desc); |
| 481 | list_add_tail(&tbf->list, &bf_head); |
| 482 | } else { |
| 483 | /* |
| 484 | * Clear descriptor status words for |
| 485 | * software retry |
| 486 | */ |
| 487 | ath9k_hw_cleartxdesc(sc->sc_ah, |
| 488 | bf->bf_desc); |
Vasanthakumar Thiagarajan | c41d92d | 2009-07-14 20:17:11 -0400 | [diff] [blame] | 489 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 490 | } |
| 491 | |
| 492 | /* |
| 493 | * Put this buffer to the temporary pending |
| 494 | * queue to retain ordering |
| 495 | */ |
| 496 | list_splice_tail_init(&bf_head, &bf_pending); |
| 497 | } |
| 498 | |
| 499 | bf = bf_next; |
| 500 | } |
| 501 | |
Felix Fietkau | 4cee786 | 2010-07-23 03:53:16 +0200 | [diff] [blame] | 502 | /* prepend un-acked frames to the beginning of the pending frame queue */ |
| 503 | if (!list_empty(&bf_pending)) { |
| 504 | spin_lock_bh(&txq->axq_lock); |
| 505 | list_splice(&bf_pending, &tid->buf_q); |
| 506 | ath_tx_queue_tid(txq, tid); |
| 507 | spin_unlock_bh(&txq->axq_lock); |
| 508 | } |
| 509 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 510 | if (tid->state & AGGR_CLEANUP) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 511 | if (tid->baw_head == tid->baw_tail) { |
| 512 | tid->state &= ~AGGR_ADDBA_COMPLETE; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 513 | tid->state &= ~AGGR_CLEANUP; |
| 514 | |
| 515 | /* send buffered frames as singles */ |
| 516 | ath_tx_flush_tid(sc, tid); |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 517 | } |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 518 | rcu_read_unlock(); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 519 | return; |
| 520 | } |
| 521 | |
Sujith | 1286ec6 | 2009-01-27 13:30:37 +0530 | [diff] [blame] | 522 | rcu_read_unlock(); |
| 523 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 524 | if (needreset) |
| 525 | ath_reset(sc, false); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 526 | } |
| 527 | |
| 528 | static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf, |
| 529 | struct ath_atx_tid *tid) |
| 530 | { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 531 | struct sk_buff *skb; |
| 532 | struct ieee80211_tx_info *tx_info; |
| 533 | struct ieee80211_tx_rate *rates; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 534 | u32 max_4ms_framelen, frmlen; |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 535 | u16 aggr_limit, legacy = 0; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 536 | int i; |
| 537 | |
Sujith | a22be22 | 2009-03-30 15:28:36 +0530 | [diff] [blame] | 538 | skb = bf->bf_mpdu; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 539 | tx_info = IEEE80211_SKB_CB(skb); |
| 540 | rates = tx_info->control.rates; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 541 | |
| 542 | /* |
| 543 | * Find the lowest frame length among the rate series that will have a |
| 544 | * 4ms transmit duration. |
| 545 | * TODO - TXOP limit needs to be considered. |
| 546 | */ |
| 547 | max_4ms_framelen = ATH_AMPDU_LIMIT_MAX; |
| 548 | |
| 549 | for (i = 0; i < 4; i++) { |
| 550 | if (rates[i].count) { |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 551 | int modeidx; |
| 552 | if (!(rates[i].flags & IEEE80211_TX_RC_MCS)) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 553 | legacy = 1; |
| 554 | break; |
| 555 | } |
| 556 | |
Felix Fietkau | 0e668cd | 2010-04-19 19:57:32 +0200 | [diff] [blame] | 557 | if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 558 | modeidx = MCS_HT40; |
| 559 | else |
Felix Fietkau | 0e668cd | 2010-04-19 19:57:32 +0200 | [diff] [blame] | 560 | modeidx = MCS_HT20; |
| 561 | |
| 562 | if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI) |
| 563 | modeidx++; |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 564 | |
| 565 | frmlen = ath_max_4ms_framelen[modeidx][rates[i].idx]; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 566 | max_4ms_framelen = min(max_4ms_framelen, frmlen); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 567 | } |
| 568 | } |
| 569 | |
| 570 | /* |
| 571 | * limit aggregate size by the minimum rate if rate selected is |
| 572 | * not a probe rate, if rate selected is a probe rate then |
| 573 | * avoid aggregation of this packet. |
| 574 | */ |
| 575 | if (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE || legacy) |
| 576 | return 0; |
| 577 | |
Vasanthakumar Thiagarajan | 1773912 | 2009-08-26 21:08:50 +0530 | [diff] [blame] | 578 | if (sc->sc_flags & SC_OP_BT_PRIORITY_DETECTED) |
| 579 | aggr_limit = min((max_4ms_framelen * 3) / 8, |
| 580 | (u32)ATH_AMPDU_LIMIT_MAX); |
| 581 | else |
| 582 | aggr_limit = min(max_4ms_framelen, |
| 583 | (u32)ATH_AMPDU_LIMIT_MAX); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 584 | |
| 585 | /* |
| 586 | * h/w can accept aggregates upto 16 bit lengths (65535). |
| 587 | * The IE, however can hold upto 65536, which shows up here |
| 588 | * as zero. Ignore 65536 since we are constrained by hw. |
| 589 | */ |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 590 | if (tid->an->maxampdu) |
| 591 | aggr_limit = min(aggr_limit, tid->an->maxampdu); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 592 | |
| 593 | return aggr_limit; |
| 594 | } |
| 595 | |
| 596 | /* |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 597 | * Returns the number of delimiters to be added to |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 598 | * meet the minimum required mpdudensity. |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 599 | */ |
| 600 | static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid, |
| 601 | struct ath_buf *bf, u16 frmlen) |
| 602 | { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 603 | struct sk_buff *skb = bf->bf_mpdu; |
| 604 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 605 | u32 nsymbits, nsymbols; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 606 | u16 minlen; |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 607 | u8 flags, rix; |
Felix Fietkau | c666387 | 2010-04-19 19:57:33 +0200 | [diff] [blame] | 608 | int width, streams, half_gi, ndelim, mindelim; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 609 | |
| 610 | /* Select standard number of delimiters based on frame length alone */ |
| 611 | ndelim = ATH_AGGR_GET_NDELIM(frmlen); |
| 612 | |
| 613 | /* |
| 614 | * If encryption enabled, hardware requires some more padding between |
| 615 | * subframes. |
| 616 | * TODO - this could be improved to be dependent on the rate. |
| 617 | * The hardware can keep up at lower rates, but not higher rates |
| 618 | */ |
| 619 | if (bf->bf_keytype != ATH9K_KEY_TYPE_CLEAR) |
| 620 | ndelim += ATH_AGGR_ENCRYPTDELIM; |
| 621 | |
| 622 | /* |
| 623 | * Convert desired mpdu density from microeconds to bytes based |
| 624 | * on highest rate in rate series (i.e. first rate) to determine |
| 625 | * required minimum length for subframe. Take into account |
| 626 | * whether high rate is 20 or 40Mhz and half or full GI. |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 627 | * |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 628 | * If there is no mpdu density restriction, no further calculation |
| 629 | * is needed. |
| 630 | */ |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 631 | |
| 632 | if (tid->an->mpdudensity == 0) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 633 | return ndelim; |
| 634 | |
| 635 | rix = tx_info->control.rates[0].idx; |
| 636 | flags = tx_info->control.rates[0].flags; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 637 | width = (flags & IEEE80211_TX_RC_40_MHZ_WIDTH) ? 1 : 0; |
| 638 | half_gi = (flags & IEEE80211_TX_RC_SHORT_GI) ? 1 : 0; |
| 639 | |
| 640 | if (half_gi) |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 641 | nsymbols = NUM_SYMBOLS_PER_USEC_HALFGI(tid->an->mpdudensity); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 642 | else |
Sujith | 4ef7084 | 2009-07-23 15:32:41 +0530 | [diff] [blame] | 643 | nsymbols = NUM_SYMBOLS_PER_USEC(tid->an->mpdudensity); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 644 | |
| 645 | if (nsymbols == 0) |
| 646 | nsymbols = 1; |
| 647 | |
Felix Fietkau | c666387 | 2010-04-19 19:57:33 +0200 | [diff] [blame] | 648 | streams = HT_RC_2_STREAMS(rix); |
| 649 | nsymbits = bits_per_symbol[rix % 8][width] * streams; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 650 | minlen = (nsymbols * nsymbits) / BITS_PER_BYTE; |
| 651 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 652 | if (frmlen < minlen) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 653 | mindelim = (minlen - frmlen) / ATH_AGGR_DELIM_SZ; |
| 654 | ndelim = max(mindelim, ndelim); |
| 655 | } |
| 656 | |
| 657 | return ndelim; |
| 658 | } |
| 659 | |
| 660 | static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc, |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 661 | struct ath_txq *txq, |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 662 | struct ath_atx_tid *tid, |
| 663 | struct list_head *bf_q) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 664 | { |
| 665 | #define PADBYTES(_len) ((4 - ((_len) % 4)) % 4) |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 666 | struct ath_buf *bf, *bf_first, *bf_prev = NULL; |
| 667 | int rl = 0, nframes = 0, ndelim, prev_al = 0; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 668 | u16 aggr_limit = 0, al = 0, bpad = 0, |
| 669 | al_delta, h_baw = tid->baw_size / 2; |
| 670 | enum ATH_AGGR_STATUS status = ATH_AGGR_DONE; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 671 | |
| 672 | bf_first = list_first_entry(&tid->buf_q, struct ath_buf, list); |
| 673 | |
| 674 | do { |
| 675 | bf = list_first_entry(&tid->buf_q, struct ath_buf, list); |
| 676 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 677 | /* do not step over block-ack window */ |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 678 | if (!BAW_WITHIN(tid->seq_start, tid->baw_size, bf->bf_seqno)) { |
| 679 | status = ATH_AGGR_BAW_CLOSED; |
| 680 | break; |
| 681 | } |
| 682 | |
| 683 | if (!rl) { |
| 684 | aggr_limit = ath_lookup_rate(sc, bf, tid); |
| 685 | rl = 1; |
| 686 | } |
| 687 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 688 | /* do not exceed aggregation limit */ |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 689 | al_delta = ATH_AGGR_DELIM_SZ + bf->bf_frmlen; |
| 690 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 691 | if (nframes && |
| 692 | (aggr_limit < (al + bpad + al_delta + prev_al))) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 693 | status = ATH_AGGR_LIMITED; |
| 694 | break; |
| 695 | } |
| 696 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 697 | /* do not exceed subframe limit */ |
| 698 | if (nframes >= min((int)h_baw, ATH_AMPDU_SUBFRAME_DEFAULT)) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 699 | status = ATH_AGGR_LIMITED; |
| 700 | break; |
| 701 | } |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 702 | nframes++; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 703 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 704 | /* add padding for previous frame to aggregation length */ |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 705 | al += bpad + al_delta; |
| 706 | |
| 707 | /* |
| 708 | * Get the delimiters needed to meet the MPDU |
| 709 | * density for this node. |
| 710 | */ |
| 711 | ndelim = ath_compute_num_delims(sc, tid, bf_first, bf->bf_frmlen); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 712 | bpad = PADBYTES(al_delta) + (ndelim << 2); |
| 713 | |
| 714 | bf->bf_next = NULL; |
Vasanthakumar Thiagarajan | 87d5efb | 2010-04-15 17:38:43 -0400 | [diff] [blame] | 715 | ath9k_hw_set_desc_link(sc->sc_ah, bf->bf_desc, 0); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 716 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 717 | /* link buffers of this frame to the aggregate */ |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 718 | ath_tx_addto_baw(sc, tid, bf); |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 719 | ath9k_hw_set11n_aggr_middle(sc->sc_ah, bf->bf_desc, ndelim); |
| 720 | list_move_tail(&bf->list, bf_q); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 721 | if (bf_prev) { |
| 722 | bf_prev->bf_next = bf; |
Vasanthakumar Thiagarajan | 87d5efb | 2010-04-15 17:38:43 -0400 | [diff] [blame] | 723 | ath9k_hw_set_desc_link(sc->sc_ah, bf_prev->bf_desc, |
| 724 | bf->bf_daddr); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 725 | } |
| 726 | bf_prev = bf; |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 727 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 728 | } while (!list_empty(&tid->buf_q)); |
| 729 | |
| 730 | bf_first->bf_al = al; |
| 731 | bf_first->bf_nframes = nframes; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 732 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 733 | return status; |
| 734 | #undef PADBYTES |
| 735 | } |
| 736 | |
| 737 | static void ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq, |
| 738 | struct ath_atx_tid *tid) |
| 739 | { |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 740 | struct ath_buf *bf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 741 | enum ATH_AGGR_STATUS status; |
| 742 | struct list_head bf_q; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 743 | |
| 744 | do { |
| 745 | if (list_empty(&tid->buf_q)) |
| 746 | return; |
| 747 | |
| 748 | INIT_LIST_HEAD(&bf_q); |
| 749 | |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 750 | status = ath_tx_form_aggr(sc, txq, tid, &bf_q); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 751 | |
| 752 | /* |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 753 | * no frames picked up to be aggregated; |
| 754 | * block-ack window is not open. |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 755 | */ |
| 756 | if (list_empty(&bf_q)) |
| 757 | break; |
| 758 | |
| 759 | bf = list_first_entry(&bf_q, struct ath_buf, list); |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 760 | bf->bf_lastbf = list_entry(bf_q.prev, struct ath_buf, list); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 761 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 762 | /* if only one frame, send as non-aggregate */ |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 763 | if (bf->bf_nframes == 1) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 764 | bf->bf_state.bf_type &= ~BUF_AGGR; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 765 | ath9k_hw_clr11n_aggr(sc->sc_ah, bf->bf_desc); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 766 | ath_buf_set_rate(sc, bf); |
| 767 | ath_tx_txqaddbuf(sc, txq, &bf_q); |
| 768 | continue; |
| 769 | } |
| 770 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 771 | /* setup first desc of aggregate */ |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 772 | bf->bf_state.bf_type |= BUF_AGGR; |
| 773 | ath_buf_set_rate(sc, bf); |
| 774 | ath9k_hw_set11n_aggr_first(sc->sc_ah, bf->bf_desc, bf->bf_al); |
| 775 | |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 776 | /* anchor last desc of aggregate */ |
| 777 | ath9k_hw_set11n_aggr_last(sc->sc_ah, bf->bf_lastbf->bf_desc); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 778 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 779 | ath_tx_txqaddbuf(sc, txq, &bf_q); |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 780 | TX_STAT_INC(txq->axq_qnum, a_aggr); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 781 | |
| 782 | } while (txq->axq_depth < ATH_AGGR_MIN_QDEPTH && |
| 783 | status != ATH_AGGR_BAW_CLOSED); |
| 784 | } |
| 785 | |
Sujith | f83da96 | 2009-07-23 15:32:37 +0530 | [diff] [blame] | 786 | void ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta, |
| 787 | u16 tid, u16 *ssn) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 788 | { |
| 789 | struct ath_atx_tid *txtid; |
| 790 | struct ath_node *an; |
| 791 | |
| 792 | an = (struct ath_node *)sta->drv_priv; |
Sujith | f83da96 | 2009-07-23 15:32:37 +0530 | [diff] [blame] | 793 | txtid = ATH_AN_2_TID(an, tid); |
| 794 | txtid->state |= AGGR_ADDBA_PROGRESS; |
Lorenzo Bianconi | 7540184 | 2010-08-01 15:47:32 +0200 | [diff] [blame] | 795 | txtid->paused = true; |
Sujith | f83da96 | 2009-07-23 15:32:37 +0530 | [diff] [blame] | 796 | *ssn = txtid->seq_start; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 797 | } |
| 798 | |
Sujith | f83da96 | 2009-07-23 15:32:37 +0530 | [diff] [blame] | 799 | 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] | 800 | { |
| 801 | struct ath_node *an = (struct ath_node *)sta->drv_priv; |
| 802 | struct ath_atx_tid *txtid = ATH_AN_2_TID(an, tid); |
| 803 | struct ath_txq *txq = &sc->tx.txq[txtid->ac->qnum]; |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 804 | struct ath_tx_status ts; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 805 | struct ath_buf *bf; |
| 806 | struct list_head bf_head; |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 807 | |
| 808 | memset(&ts, 0, sizeof(ts)); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 809 | INIT_LIST_HEAD(&bf_head); |
| 810 | |
| 811 | if (txtid->state & AGGR_CLEANUP) |
Sujith | f83da96 | 2009-07-23 15:32:37 +0530 | [diff] [blame] | 812 | return; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 813 | |
| 814 | if (!(txtid->state & AGGR_ADDBA_COMPLETE)) { |
Vasanthakumar Thiagarajan | 5eae659 | 2009-06-09 15:28:21 +0530 | [diff] [blame] | 815 | txtid->state &= ~AGGR_ADDBA_PROGRESS; |
Sujith | f83da96 | 2009-07-23 15:32:37 +0530 | [diff] [blame] | 816 | return; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 817 | } |
| 818 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 819 | /* drop all software retried frames and mark this TID */ |
| 820 | spin_lock_bh(&txq->axq_lock); |
Lorenzo Bianconi | 7540184 | 2010-08-01 15:47:32 +0200 | [diff] [blame] | 821 | txtid->paused = true; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 822 | while (!list_empty(&txtid->buf_q)) { |
| 823 | bf = list_first_entry(&txtid->buf_q, struct ath_buf, list); |
| 824 | if (!bf_isretried(bf)) { |
| 825 | /* |
| 826 | * NB: it's based on the assumption that |
| 827 | * software retried frame will always stay |
| 828 | * at the head of software queue. |
| 829 | */ |
| 830 | break; |
| 831 | } |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 832 | list_move_tail(&bf->list, &bf_head); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 833 | ath_tx_update_baw(sc, txtid, bf->bf_seqno); |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 834 | ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 0); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 835 | } |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 836 | spin_unlock_bh(&txq->axq_lock); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 837 | |
| 838 | if (txtid->baw_head != txtid->baw_tail) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 839 | txtid->state |= AGGR_CLEANUP; |
| 840 | } else { |
| 841 | txtid->state &= ~AGGR_ADDBA_COMPLETE; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 842 | ath_tx_flush_tid(sc, txtid); |
| 843 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 844 | } |
| 845 | |
| 846 | void ath_tx_aggr_resume(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid) |
| 847 | { |
| 848 | struct ath_atx_tid *txtid; |
| 849 | struct ath_node *an; |
| 850 | |
| 851 | an = (struct ath_node *)sta->drv_priv; |
| 852 | |
| 853 | if (sc->sc_flags & SC_OP_TXAGGR) { |
| 854 | txtid = ATH_AN_2_TID(an, tid); |
| 855 | txtid->baw_size = |
| 856 | IEEE80211_MIN_AMPDU_BUF << sta->ht_cap.ampdu_factor; |
| 857 | txtid->state |= AGGR_ADDBA_COMPLETE; |
| 858 | txtid->state &= ~AGGR_ADDBA_PROGRESS; |
| 859 | ath_tx_resume_tid(sc, txtid); |
| 860 | } |
| 861 | } |
| 862 | |
| 863 | bool ath_tx_aggr_check(struct ath_softc *sc, struct ath_node *an, u8 tidno) |
| 864 | { |
| 865 | struct ath_atx_tid *txtid; |
| 866 | |
| 867 | if (!(sc->sc_flags & SC_OP_TXAGGR)) |
| 868 | return false; |
| 869 | |
| 870 | txtid = ATH_AN_2_TID(an, tidno); |
| 871 | |
Vasanthakumar Thiagarajan | c3d8f02 | 2009-06-10 17:50:08 +0530 | [diff] [blame] | 872 | if (!(txtid->state & (AGGR_ADDBA_COMPLETE | AGGR_ADDBA_PROGRESS))) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 873 | return true; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 874 | return false; |
| 875 | } |
| 876 | |
| 877 | /********************/ |
| 878 | /* Queue Management */ |
| 879 | /********************/ |
| 880 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 881 | static void ath_txq_drain_pending_buffers(struct ath_softc *sc, |
| 882 | struct ath_txq *txq) |
| 883 | { |
| 884 | struct ath_atx_ac *ac, *ac_tmp; |
| 885 | struct ath_atx_tid *tid, *tid_tmp; |
| 886 | |
| 887 | list_for_each_entry_safe(ac, ac_tmp, &txq->axq_acq, list) { |
| 888 | list_del(&ac->list); |
| 889 | ac->sched = false; |
| 890 | list_for_each_entry_safe(tid, tid_tmp, &ac->tid_q, list) { |
| 891 | list_del(&tid->list); |
| 892 | tid->sched = false; |
| 893 | ath_tid_drain(sc, txq, tid); |
| 894 | } |
| 895 | } |
| 896 | } |
| 897 | |
| 898 | struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype) |
| 899 | { |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 900 | struct ath_hw *ah = sc->sc_ah; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 901 | struct ath_common *common = ath9k_hw_common(ah); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 902 | struct ath9k_tx_queue_info qi; |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 903 | int qnum, i; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 904 | |
| 905 | memset(&qi, 0, sizeof(qi)); |
| 906 | qi.tqi_subtype = subtype; |
| 907 | qi.tqi_aifs = ATH9K_TXQ_USEDEFAULT; |
| 908 | qi.tqi_cwmin = ATH9K_TXQ_USEDEFAULT; |
| 909 | qi.tqi_cwmax = ATH9K_TXQ_USEDEFAULT; |
| 910 | qi.tqi_physCompBuf = 0; |
| 911 | |
| 912 | /* |
| 913 | * Enable interrupts only for EOL and DESC conditions. |
| 914 | * We mark tx descriptors to receive a DESC interrupt |
| 915 | * when a tx queue gets deep; otherwise waiting for the |
| 916 | * EOL to reap descriptors. Note that this is done to |
| 917 | * reduce interrupt load and this only defers reaping |
| 918 | * descriptors, never transmitting frames. Aside from |
| 919 | * reducing interrupts this also permits more concurrency. |
| 920 | * The only potential downside is if the tx queue backs |
| 921 | * up in which case the top half of the kernel may backup |
| 922 | * due to a lack of tx descriptors. |
| 923 | * |
| 924 | * The UAPSD queue is an exception, since we take a desc- |
| 925 | * based intr on the EOSP frames. |
| 926 | */ |
Vasanthakumar Thiagarajan | afe754d | 2010-04-15 17:39:40 -0400 | [diff] [blame] | 927 | if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
| 928 | qi.tqi_qflags = TXQ_FLAG_TXOKINT_ENABLE | |
| 929 | TXQ_FLAG_TXERRINT_ENABLE; |
| 930 | } else { |
| 931 | if (qtype == ATH9K_TX_QUEUE_UAPSD) |
| 932 | qi.tqi_qflags = TXQ_FLAG_TXDESCINT_ENABLE; |
| 933 | else |
| 934 | qi.tqi_qflags = TXQ_FLAG_TXEOLINT_ENABLE | |
| 935 | TXQ_FLAG_TXDESCINT_ENABLE; |
| 936 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 937 | qnum = ath9k_hw_setuptxqueue(ah, qtype, &qi); |
| 938 | if (qnum == -1) { |
| 939 | /* |
| 940 | * NB: don't print a message, this happens |
| 941 | * normally on parts with too few tx queues |
| 942 | */ |
| 943 | return NULL; |
| 944 | } |
| 945 | if (qnum >= ARRAY_SIZE(sc->tx.txq)) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 946 | ath_print(common, ATH_DBG_FATAL, |
| 947 | "qnum %u out of range, max %u!\n", |
| 948 | qnum, (unsigned int)ARRAY_SIZE(sc->tx.txq)); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 949 | ath9k_hw_releasetxqueue(ah, qnum); |
| 950 | return NULL; |
| 951 | } |
| 952 | if (!ATH_TXQ_SETUP(sc, qnum)) { |
| 953 | struct ath_txq *txq = &sc->tx.txq[qnum]; |
| 954 | |
Felix Fietkau | 293f2ba | 2010-06-12 00:33:49 -0400 | [diff] [blame] | 955 | txq->axq_class = subtype; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 956 | txq->axq_qnum = qnum; |
| 957 | txq->axq_link = NULL; |
| 958 | INIT_LIST_HEAD(&txq->axq_q); |
| 959 | INIT_LIST_HEAD(&txq->axq_acq); |
| 960 | spin_lock_init(&txq->axq_lock); |
| 961 | txq->axq_depth = 0; |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 962 | txq->axq_tx_inprogress = false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 963 | sc->tx.txqsetup |= 1<<qnum; |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 964 | |
| 965 | txq->txq_headidx = txq->txq_tailidx = 0; |
| 966 | for (i = 0; i < ATH_TXFIFO_DEPTH; i++) |
| 967 | INIT_LIST_HEAD(&txq->txq_fifo[i]); |
| 968 | INIT_LIST_HEAD(&txq->txq_fifo_pending); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 969 | } |
| 970 | return &sc->tx.txq[qnum]; |
| 971 | } |
| 972 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 973 | int ath_txq_update(struct ath_softc *sc, int qnum, |
| 974 | struct ath9k_tx_queue_info *qinfo) |
| 975 | { |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 976 | struct ath_hw *ah = sc->sc_ah; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 977 | int error = 0; |
| 978 | struct ath9k_tx_queue_info qi; |
| 979 | |
| 980 | if (qnum == sc->beacon.beaconq) { |
| 981 | /* |
| 982 | * XXX: for beacon queue, we just save the parameter. |
| 983 | * It will be picked up by ath_beaconq_config when |
| 984 | * it's necessary. |
| 985 | */ |
| 986 | sc->beacon.beacon_qi = *qinfo; |
| 987 | return 0; |
| 988 | } |
| 989 | |
Luis R. Rodriguez | 9680e8a | 2009-09-13 23:28:00 -0700 | [diff] [blame] | 990 | BUG_ON(sc->tx.txq[qnum].axq_qnum != qnum); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 991 | |
| 992 | ath9k_hw_get_txq_props(ah, qnum, &qi); |
| 993 | qi.tqi_aifs = qinfo->tqi_aifs; |
| 994 | qi.tqi_cwmin = qinfo->tqi_cwmin; |
| 995 | qi.tqi_cwmax = qinfo->tqi_cwmax; |
| 996 | qi.tqi_burstTime = qinfo->tqi_burstTime; |
| 997 | qi.tqi_readyTime = qinfo->tqi_readyTime; |
| 998 | |
| 999 | if (!ath9k_hw_set_txq_props(ah, qnum, &qi)) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1000 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL, |
| 1001 | "Unable to update hardware queue %u!\n", qnum); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1002 | error = -EIO; |
| 1003 | } else { |
| 1004 | ath9k_hw_resettxqueue(ah, qnum); |
| 1005 | } |
| 1006 | |
| 1007 | return error; |
| 1008 | } |
| 1009 | |
| 1010 | int ath_cabq_update(struct ath_softc *sc) |
| 1011 | { |
| 1012 | struct ath9k_tx_queue_info qi; |
| 1013 | int qnum = sc->beacon.cabq->axq_qnum; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1014 | |
| 1015 | ath9k_hw_get_txq_props(sc->sc_ah, qnum, &qi); |
| 1016 | /* |
| 1017 | * Ensure the readytime % is within the bounds. |
| 1018 | */ |
Sujith | 17d7904 | 2009-02-09 13:27:03 +0530 | [diff] [blame] | 1019 | if (sc->config.cabqReadytime < ATH9K_READY_TIME_LO_BOUND) |
| 1020 | sc->config.cabqReadytime = ATH9K_READY_TIME_LO_BOUND; |
| 1021 | else if (sc->config.cabqReadytime > ATH9K_READY_TIME_HI_BOUND) |
| 1022 | sc->config.cabqReadytime = ATH9K_READY_TIME_HI_BOUND; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1023 | |
Johannes Berg | 57c4d7b | 2009-04-23 16:10:04 +0200 | [diff] [blame] | 1024 | qi.tqi_readyTime = (sc->beacon_interval * |
Sujith | fdbf733 | 2009-02-17 15:36:35 +0530 | [diff] [blame] | 1025 | sc->config.cabqReadytime) / 100; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1026 | ath_txq_update(sc, qnum, &qi); |
| 1027 | |
| 1028 | return 0; |
| 1029 | } |
| 1030 | |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1031 | /* |
| 1032 | * Drain a given TX queue (could be Beacon or Data) |
| 1033 | * |
| 1034 | * This assumes output has been stopped and |
| 1035 | * we do not need to block ath_tx_tasklet. |
| 1036 | */ |
| 1037 | 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] | 1038 | { |
| 1039 | struct ath_buf *bf, *lastbf; |
| 1040 | struct list_head bf_head; |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 1041 | struct ath_tx_status ts; |
| 1042 | |
| 1043 | memset(&ts, 0, sizeof(ts)); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1044 | INIT_LIST_HEAD(&bf_head); |
| 1045 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1046 | for (;;) { |
| 1047 | spin_lock_bh(&txq->axq_lock); |
| 1048 | |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 1049 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
| 1050 | if (list_empty(&txq->txq_fifo[txq->txq_tailidx])) { |
| 1051 | txq->txq_headidx = txq->txq_tailidx = 0; |
| 1052 | spin_unlock_bh(&txq->axq_lock); |
| 1053 | break; |
| 1054 | } else { |
| 1055 | bf = list_first_entry(&txq->txq_fifo[txq->txq_tailidx], |
| 1056 | struct ath_buf, list); |
| 1057 | } |
| 1058 | } else { |
| 1059 | if (list_empty(&txq->axq_q)) { |
| 1060 | txq->axq_link = NULL; |
| 1061 | spin_unlock_bh(&txq->axq_lock); |
| 1062 | break; |
| 1063 | } |
| 1064 | bf = list_first_entry(&txq->axq_q, struct ath_buf, |
| 1065 | list); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1066 | |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 1067 | if (bf->bf_stale) { |
| 1068 | list_del(&bf->list); |
| 1069 | spin_unlock_bh(&txq->axq_lock); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1070 | |
Felix Fietkau | 0a8cea8 | 2010-04-19 19:57:30 +0200 | [diff] [blame] | 1071 | ath_tx_return_buffer(sc, bf); |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 1072 | continue; |
| 1073 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1074 | } |
| 1075 | |
| 1076 | lastbf = bf->bf_lastbf; |
Vasanthakumar Thiagarajan | 6d913f7 | 2010-04-15 17:38:46 -0400 | [diff] [blame] | 1077 | if (!retry_tx) |
| 1078 | lastbf->bf_tx_aborted = true; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1079 | |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 1080 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
| 1081 | list_cut_position(&bf_head, |
| 1082 | &txq->txq_fifo[txq->txq_tailidx], |
| 1083 | &lastbf->list); |
| 1084 | INCR(txq->txq_tailidx, ATH_TXFIFO_DEPTH); |
| 1085 | } else { |
| 1086 | /* remove ath_buf's of the same mpdu from txq */ |
| 1087 | list_cut_position(&bf_head, &txq->axq_q, &lastbf->list); |
| 1088 | } |
| 1089 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1090 | txq->axq_depth--; |
| 1091 | |
| 1092 | spin_unlock_bh(&txq->axq_lock); |
| 1093 | |
| 1094 | if (bf_isampdu(bf)) |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 1095 | ath_tx_complete_aggr(sc, txq, bf, &bf_head, &ts, 0); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1096 | else |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 1097 | ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 0); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1098 | } |
| 1099 | |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 1100 | spin_lock_bh(&txq->axq_lock); |
| 1101 | txq->axq_tx_inprogress = false; |
| 1102 | spin_unlock_bh(&txq->axq_lock); |
| 1103 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1104 | /* flush any pending frames if aggregation is enabled */ |
| 1105 | if (sc->sc_flags & SC_OP_TXAGGR) { |
| 1106 | if (!retry_tx) { |
| 1107 | spin_lock_bh(&txq->axq_lock); |
| 1108 | ath_txq_drain_pending_buffers(sc, txq); |
| 1109 | spin_unlock_bh(&txq->axq_lock); |
| 1110 | } |
| 1111 | } |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 1112 | |
| 1113 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
| 1114 | spin_lock_bh(&txq->axq_lock); |
| 1115 | while (!list_empty(&txq->txq_fifo_pending)) { |
| 1116 | bf = list_first_entry(&txq->txq_fifo_pending, |
| 1117 | struct ath_buf, list); |
| 1118 | list_cut_position(&bf_head, |
| 1119 | &txq->txq_fifo_pending, |
| 1120 | &bf->bf_lastbf->list); |
| 1121 | spin_unlock_bh(&txq->axq_lock); |
| 1122 | |
| 1123 | if (bf_isampdu(bf)) |
| 1124 | ath_tx_complete_aggr(sc, txq, bf, &bf_head, |
| 1125 | &ts, 0); |
| 1126 | else |
| 1127 | ath_tx_complete_buf(sc, bf, txq, &bf_head, |
| 1128 | &ts, 0, 0); |
| 1129 | spin_lock_bh(&txq->axq_lock); |
| 1130 | } |
| 1131 | spin_unlock_bh(&txq->axq_lock); |
| 1132 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1133 | } |
| 1134 | |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1135 | void ath_drain_all_txq(struct ath_softc *sc, bool retry_tx) |
| 1136 | { |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 1137 | struct ath_hw *ah = sc->sc_ah; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1138 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1139 | struct ath_txq *txq; |
| 1140 | int i, npend = 0; |
| 1141 | |
| 1142 | if (sc->sc_flags & SC_OP_INVALID) |
| 1143 | return; |
| 1144 | |
| 1145 | /* Stop beacon queue */ |
| 1146 | ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq); |
| 1147 | |
| 1148 | /* Stop data queues */ |
| 1149 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { |
| 1150 | if (ATH_TXQ_SETUP(sc, i)) { |
| 1151 | txq = &sc->tx.txq[i]; |
| 1152 | ath9k_hw_stoptxdma(ah, txq->axq_qnum); |
| 1153 | npend += ath9k_hw_numtxpending(ah, txq->axq_qnum); |
| 1154 | } |
| 1155 | } |
| 1156 | |
| 1157 | if (npend) { |
| 1158 | int r; |
| 1159 | |
Sujith | e8009e9 | 2009-12-14 14:57:08 +0530 | [diff] [blame] | 1160 | ath_print(common, ATH_DBG_FATAL, |
Justin P. Mattock | 9be8ab2 | 2010-05-26 11:00:04 -0700 | [diff] [blame] | 1161 | "Failed to stop TX DMA. Resetting hardware!\n"); |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1162 | |
| 1163 | spin_lock_bh(&sc->sc_resetlock); |
Felix Fietkau | 20bd2a0 | 2010-07-31 00:12:00 +0200 | [diff] [blame] | 1164 | r = ath9k_hw_reset(ah, sc->sc_ah->curchan, ah->caldata, false); |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1165 | if (r) |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1166 | ath_print(common, ATH_DBG_FATAL, |
| 1167 | "Unable to reset hardware; reset status %d\n", |
| 1168 | r); |
Sujith | 043a040 | 2009-01-16 21:38:47 +0530 | [diff] [blame] | 1169 | spin_unlock_bh(&sc->sc_resetlock); |
| 1170 | } |
| 1171 | |
| 1172 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { |
| 1173 | if (ATH_TXQ_SETUP(sc, i)) |
| 1174 | ath_draintxq(sc, &sc->tx.txq[i], retry_tx); |
| 1175 | } |
| 1176 | } |
| 1177 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1178 | void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq) |
| 1179 | { |
| 1180 | ath9k_hw_releasetxqueue(sc->sc_ah, txq->axq_qnum); |
| 1181 | sc->tx.txqsetup &= ~(1<<txq->axq_qnum); |
| 1182 | } |
| 1183 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1184 | void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq) |
| 1185 | { |
| 1186 | struct ath_atx_ac *ac; |
| 1187 | struct ath_atx_tid *tid; |
| 1188 | |
| 1189 | if (list_empty(&txq->axq_acq)) |
| 1190 | return; |
| 1191 | |
| 1192 | ac = list_first_entry(&txq->axq_acq, struct ath_atx_ac, list); |
| 1193 | list_del(&ac->list); |
| 1194 | ac->sched = false; |
| 1195 | |
| 1196 | do { |
| 1197 | if (list_empty(&ac->tid_q)) |
| 1198 | return; |
| 1199 | |
| 1200 | tid = list_first_entry(&ac->tid_q, struct ath_atx_tid, list); |
| 1201 | list_del(&tid->list); |
| 1202 | tid->sched = false; |
| 1203 | |
| 1204 | if (tid->paused) |
| 1205 | continue; |
| 1206 | |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 1207 | ath_tx_sched_aggr(sc, txq, tid); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1208 | |
| 1209 | /* |
| 1210 | * add tid to round-robin queue if more frames |
| 1211 | * are pending for the tid |
| 1212 | */ |
| 1213 | if (!list_empty(&tid->buf_q)) |
| 1214 | ath_tx_queue_tid(txq, tid); |
| 1215 | |
| 1216 | break; |
| 1217 | } while (!list_empty(&ac->tid_q)); |
| 1218 | |
| 1219 | if (!list_empty(&ac->tid_q)) { |
| 1220 | if (!ac->sched) { |
| 1221 | ac->sched = true; |
| 1222 | list_add_tail(&ac->list, &txq->axq_acq); |
| 1223 | } |
| 1224 | } |
| 1225 | } |
| 1226 | |
| 1227 | int ath_tx_setup(struct ath_softc *sc, int haltype) |
| 1228 | { |
| 1229 | struct ath_txq *txq; |
| 1230 | |
| 1231 | if (haltype >= ARRAY_SIZE(sc->tx.hwq_map)) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1232 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL, |
| 1233 | "HAL AC %u out of range, max %zu!\n", |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1234 | haltype, ARRAY_SIZE(sc->tx.hwq_map)); |
| 1235 | return 0; |
| 1236 | } |
| 1237 | txq = ath_txq_setup(sc, ATH9K_TX_QUEUE_DATA, haltype); |
| 1238 | if (txq != NULL) { |
| 1239 | sc->tx.hwq_map[haltype] = txq->axq_qnum; |
| 1240 | return 1; |
| 1241 | } else |
| 1242 | return 0; |
| 1243 | } |
| 1244 | |
| 1245 | /***********/ |
| 1246 | /* TX, DMA */ |
| 1247 | /***********/ |
| 1248 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1249 | /* |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1250 | * Insert a chain of ath_buf (descriptors) on a txq and |
| 1251 | * assume the descriptors are already chained together by caller. |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1252 | */ |
Sujith | 102e057 | 2008-10-29 10:15:16 +0530 | [diff] [blame] | 1253 | static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, |
| 1254 | struct list_head *head) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1255 | { |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 1256 | struct ath_hw *ah = sc->sc_ah; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1257 | struct ath_common *common = ath9k_hw_common(ah); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1258 | struct ath_buf *bf; |
Sujith | 102e057 | 2008-10-29 10:15:16 +0530 | [diff] [blame] | 1259 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1260 | /* |
| 1261 | * Insert the frame on the outbound list and |
| 1262 | * pass it on to the hardware. |
| 1263 | */ |
| 1264 | |
| 1265 | if (list_empty(head)) |
| 1266 | return; |
| 1267 | |
| 1268 | bf = list_first_entry(head, struct ath_buf, list); |
| 1269 | |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1270 | ath_print(common, ATH_DBG_QUEUE, |
| 1271 | "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] | 1272 | |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 1273 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
| 1274 | if (txq->axq_depth >= ATH_TXFIFO_DEPTH) { |
| 1275 | list_splice_tail_init(head, &txq->txq_fifo_pending); |
| 1276 | return; |
| 1277 | } |
| 1278 | if (!list_empty(&txq->txq_fifo[txq->txq_headidx])) |
| 1279 | ath_print(common, ATH_DBG_XMIT, |
| 1280 | "Initializing tx fifo %d which " |
| 1281 | "is non-empty\n", |
| 1282 | txq->txq_headidx); |
| 1283 | INIT_LIST_HEAD(&txq->txq_fifo[txq->txq_headidx]); |
| 1284 | list_splice_init(head, &txq->txq_fifo[txq->txq_headidx]); |
| 1285 | INCR(txq->txq_headidx, ATH_TXFIFO_DEPTH); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1286 | ath9k_hw_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1287 | ath_print(common, ATH_DBG_XMIT, |
| 1288 | "TXDP[%u] = %llx (%p)\n", |
| 1289 | txq->axq_qnum, ito64(bf->bf_daddr), bf->bf_desc); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1290 | } else { |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 1291 | list_splice_tail_init(head, &txq->axq_q); |
| 1292 | |
| 1293 | if (txq->axq_link == NULL) { |
| 1294 | ath9k_hw_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); |
| 1295 | ath_print(common, ATH_DBG_XMIT, |
| 1296 | "TXDP[%u] = %llx (%p)\n", |
| 1297 | txq->axq_qnum, ito64(bf->bf_daddr), |
| 1298 | bf->bf_desc); |
| 1299 | } else { |
| 1300 | *txq->axq_link = bf->bf_daddr; |
| 1301 | ath_print(common, ATH_DBG_XMIT, |
| 1302 | "link[%u] (%p)=%llx (%p)\n", |
| 1303 | txq->axq_qnum, txq->axq_link, |
| 1304 | ito64(bf->bf_daddr), bf->bf_desc); |
| 1305 | } |
| 1306 | ath9k_hw_get_desc_link(ah, bf->bf_lastbf->bf_desc, |
| 1307 | &txq->axq_link); |
| 1308 | ath9k_hw_txstart(ah, txq->axq_qnum); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1309 | } |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 1310 | txq->axq_depth++; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1311 | } |
| 1312 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1313 | static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid, |
| 1314 | struct list_head *bf_head, |
| 1315 | struct ath_tx_control *txctl) |
| 1316 | { |
| 1317 | struct ath_buf *bf; |
| 1318 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1319 | bf = list_first_entry(bf_head, struct ath_buf, list); |
| 1320 | bf->bf_state.bf_type |= BUF_AMPDU; |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 1321 | TX_STAT_INC(txctl->txq->axq_qnum, a_queued); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1322 | |
| 1323 | /* |
| 1324 | * Do not queue to h/w when any of the following conditions is true: |
| 1325 | * - there are pending frames in software queue |
| 1326 | * - the TID is currently paused for ADDBA/BAR request |
| 1327 | * - seqno is not within block-ack window |
| 1328 | * - h/w queue depth exceeds low water mark |
| 1329 | */ |
| 1330 | if (!list_empty(&tid->buf_q) || tid->paused || |
| 1331 | !BAW_WITHIN(tid->seq_start, tid->baw_size, bf->bf_seqno) || |
| 1332 | txctl->txq->axq_depth >= ATH_AGGR_MIN_QDEPTH) { |
Jouni Malinen | f7a276a | 2008-12-15 16:02:04 +0200 | [diff] [blame] | 1333 | /* |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1334 | * Add this frame to software queue for scheduling later |
| 1335 | * for aggregation. |
Jouni Malinen | f7a276a | 2008-12-15 16:02:04 +0200 | [diff] [blame] | 1336 | */ |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 1337 | list_move_tail(&bf->list, &tid->buf_q); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1338 | ath_tx_queue_tid(txctl->txq, tid); |
| 1339 | return; |
Jouni Malinen | f7a276a | 2008-12-15 16:02:04 +0200 | [diff] [blame] | 1340 | } |
| 1341 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1342 | /* Add sub-frame to BAW */ |
| 1343 | ath_tx_addto_baw(sc, tid, bf); |
| 1344 | |
| 1345 | /* Queue to h/w without aggregation */ |
| 1346 | bf->bf_nframes = 1; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 1347 | bf->bf_lastbf = bf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1348 | ath_buf_set_rate(sc, bf); |
| 1349 | ath_tx_txqaddbuf(sc, txctl->txq, bf_head); |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 1350 | } |
| 1351 | |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 1352 | static void ath_tx_send_ht_normal(struct ath_softc *sc, struct ath_txq *txq, |
| 1353 | struct ath_atx_tid *tid, |
| 1354 | struct list_head *bf_head) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1355 | { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1356 | struct ath_buf *bf; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1357 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1358 | bf = list_first_entry(bf_head, struct ath_buf, list); |
| 1359 | bf->bf_state.bf_type &= ~BUF_AMPDU; |
| 1360 | |
| 1361 | /* update starting sequence number for subsequent ADDBA request */ |
| 1362 | INCR(tid->seq_start, IEEE80211_SEQ_MAX); |
| 1363 | |
| 1364 | bf->bf_nframes = 1; |
Sujith | d43f3015 | 2009-01-16 21:38:53 +0530 | [diff] [blame] | 1365 | bf->bf_lastbf = bf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1366 | ath_buf_set_rate(sc, bf); |
| 1367 | ath_tx_txqaddbuf(sc, txq, bf_head); |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 1368 | TX_STAT_INC(txq->axq_qnum, queued); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1369 | } |
| 1370 | |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 1371 | static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq, |
| 1372 | struct list_head *bf_head) |
| 1373 | { |
| 1374 | struct ath_buf *bf; |
| 1375 | |
| 1376 | bf = list_first_entry(bf_head, struct ath_buf, list); |
| 1377 | |
| 1378 | bf->bf_lastbf = bf; |
| 1379 | bf->bf_nframes = 1; |
| 1380 | ath_buf_set_rate(sc, bf); |
| 1381 | ath_tx_txqaddbuf(sc, txq, bf_head); |
Sujith | fec247c | 2009-07-27 12:08:16 +0530 | [diff] [blame] | 1382 | TX_STAT_INC(txq->axq_qnum, queued); |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 1383 | } |
| 1384 | |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1385 | 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] | 1386 | { |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1387 | struct ieee80211_hdr *hdr; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1388 | enum ath9k_pkt_type htype; |
| 1389 | __le16 fc; |
| 1390 | |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1391 | hdr = (struct ieee80211_hdr *)skb->data; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1392 | fc = hdr->frame_control; |
| 1393 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1394 | if (ieee80211_is_beacon(fc)) |
| 1395 | htype = ATH9K_PKT_TYPE_BEACON; |
| 1396 | else if (ieee80211_is_probe_resp(fc)) |
| 1397 | htype = ATH9K_PKT_TYPE_PROBE_RESP; |
| 1398 | else if (ieee80211_is_atim(fc)) |
| 1399 | htype = ATH9K_PKT_TYPE_ATIM; |
| 1400 | else if (ieee80211_is_pspoll(fc)) |
| 1401 | htype = ATH9K_PKT_TYPE_PSPOLL; |
| 1402 | else |
| 1403 | htype = ATH9K_PKT_TYPE_NORMAL; |
| 1404 | |
| 1405 | return htype; |
| 1406 | } |
| 1407 | |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1408 | static void assign_aggr_tid_seqno(struct sk_buff *skb, |
| 1409 | struct ath_buf *bf) |
| 1410 | { |
| 1411 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
| 1412 | struct ieee80211_hdr *hdr; |
| 1413 | struct ath_node *an; |
| 1414 | struct ath_atx_tid *tid; |
| 1415 | __le16 fc; |
| 1416 | u8 *qc; |
| 1417 | |
| 1418 | if (!tx_info->control.sta) |
| 1419 | return; |
| 1420 | |
| 1421 | an = (struct ath_node *)tx_info->control.sta->drv_priv; |
| 1422 | hdr = (struct ieee80211_hdr *)skb->data; |
| 1423 | fc = hdr->frame_control; |
| 1424 | |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1425 | if (ieee80211_is_data_qos(fc)) { |
| 1426 | qc = ieee80211_get_qos_ctl(hdr); |
| 1427 | bf->bf_tidno = qc[0] & 0xf; |
Sujith | 98deeea | 2008-08-11 14:05:46 +0530 | [diff] [blame] | 1428 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1429 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1430 | /* |
| 1431 | * For HT capable stations, we save tidno for later use. |
Senthil Balasubramanian | d3a1db1 | 2008-12-22 16:31:58 +0530 | [diff] [blame] | 1432 | * We also override seqno set by upper layer with the one |
| 1433 | * in tx aggregation state. |
Senthil Balasubramanian | d3a1db1 | 2008-12-22 16:31:58 +0530 | [diff] [blame] | 1434 | */ |
| 1435 | tid = ATH_AN_2_TID(an, bf->bf_tidno); |
Sujith | 17b182e | 2009-12-14 14:56:56 +0530 | [diff] [blame] | 1436 | hdr->seq_ctrl = cpu_to_le16(tid->seq_next << IEEE80211_SEQ_SEQ_SHIFT); |
Senthil Balasubramanian | d3a1db1 | 2008-12-22 16:31:58 +0530 | [diff] [blame] | 1437 | bf->bf_seqno = tid->seq_next; |
| 1438 | INCR(tid->seq_next, IEEE80211_SEQ_MAX); |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1439 | } |
| 1440 | |
Luis R. Rodriguez | b0a3344 | 2010-04-15 17:39:39 -0400 | [diff] [blame] | 1441 | static int setup_tx_flags(struct sk_buff *skb, bool use_ldpc) |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1442 | { |
| 1443 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
| 1444 | int flags = 0; |
| 1445 | |
| 1446 | flags |= ATH9K_TXDESC_CLRDMASK; /* needed for crypto errors */ |
| 1447 | flags |= ATH9K_TXDESC_INTREQ; |
| 1448 | |
| 1449 | if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK) |
| 1450 | flags |= ATH9K_TXDESC_NOACK; |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1451 | |
Luis R. Rodriguez | b0a3344 | 2010-04-15 17:39:39 -0400 | [diff] [blame] | 1452 | if (use_ldpc) |
| 1453 | flags |= ATH9K_TXDESC_LDPC; |
| 1454 | |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1455 | return flags; |
| 1456 | } |
| 1457 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1458 | /* |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1459 | * rix - rate index |
| 1460 | * pktlen - total bytes (delims + data + fcs + pads + pad delims) |
| 1461 | * width - 0 for 20 MHz, 1 for 40 MHz |
| 1462 | * half_gi - to use 4us v/s 3.6 us for symbol time |
| 1463 | */ |
Sujith | 102e057 | 2008-10-29 10:15:16 +0530 | [diff] [blame] | 1464 | static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, struct ath_buf *bf, |
| 1465 | int width, int half_gi, bool shortPreamble) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1466 | { |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1467 | u32 nbits, nsymbits, duration, nsymbols; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1468 | int streams, pktlen; |
| 1469 | |
Sujith | cd3d39a | 2008-08-11 14:03:34 +0530 | [diff] [blame] | 1470 | pktlen = bf_isaggr(bf) ? bf->bf_al : bf->bf_frmlen; |
Sujith | e63835b | 2008-11-18 09:07:53 +0530 | [diff] [blame] | 1471 | |
| 1472 | /* find number of symbols: PLCP + data */ |
Felix Fietkau | c666387 | 2010-04-19 19:57:33 +0200 | [diff] [blame] | 1473 | streams = HT_RC_2_STREAMS(rix); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1474 | nbits = (pktlen << 3) + OFDM_PLCP_BITS; |
Felix Fietkau | c666387 | 2010-04-19 19:57:33 +0200 | [diff] [blame] | 1475 | nsymbits = bits_per_symbol[rix % 8][width] * streams; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1476 | nsymbols = (nbits + nsymbits - 1) / nsymbits; |
| 1477 | |
| 1478 | if (!half_gi) |
| 1479 | duration = SYMBOL_TIME(nsymbols); |
| 1480 | else |
| 1481 | duration = SYMBOL_TIME_HALFGI(nsymbols); |
| 1482 | |
Sujith | e63835b | 2008-11-18 09:07:53 +0530 | [diff] [blame] | 1483 | /* addup duration for legacy/ht training and signal fields */ |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1484 | 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] | 1485 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1486 | return duration; |
| 1487 | } |
| 1488 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1489 | static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf) |
| 1490 | { |
Luis R. Rodriguez | 43c2761 | 2009-09-13 21:07:07 -0700 | [diff] [blame] | 1491 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1492 | struct ath9k_11n_rate_series series[4]; |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1493 | struct sk_buff *skb; |
| 1494 | struct ieee80211_tx_info *tx_info; |
Sujith | a8efee4 | 2008-11-18 09:07:30 +0530 | [diff] [blame] | 1495 | struct ieee80211_tx_rate *rates; |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 1496 | const struct ieee80211_rate *rate; |
Sujith | 254ad0f | 2009-02-04 08:10:19 +0530 | [diff] [blame] | 1497 | struct ieee80211_hdr *hdr; |
Sujith | c89424d | 2009-01-30 14:29:28 +0530 | [diff] [blame] | 1498 | int i, flags = 0; |
| 1499 | u8 rix = 0, ctsrate = 0; |
Sujith | 254ad0f | 2009-02-04 08:10:19 +0530 | [diff] [blame] | 1500 | bool is_pspoll; |
Sujith | e63835b | 2008-11-18 09:07:53 +0530 | [diff] [blame] | 1501 | |
| 1502 | memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4); |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1503 | |
Sujith | a22be22 | 2009-03-30 15:28:36 +0530 | [diff] [blame] | 1504 | skb = bf->bf_mpdu; |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1505 | tx_info = IEEE80211_SKB_CB(skb); |
Sujith | e63835b | 2008-11-18 09:07:53 +0530 | [diff] [blame] | 1506 | rates = tx_info->control.rates; |
Sujith | 254ad0f | 2009-02-04 08:10:19 +0530 | [diff] [blame] | 1507 | hdr = (struct ieee80211_hdr *)skb->data; |
| 1508 | is_pspoll = ieee80211_is_pspoll(hdr->frame_control); |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1509 | |
Sujith | c89424d | 2009-01-30 14:29:28 +0530 | [diff] [blame] | 1510 | /* |
| 1511 | * We check if Short Preamble is needed for the CTS rate by |
| 1512 | * checking the BSS's global flag. |
| 1513 | * But for the rate series, IEEE80211_TX_RC_USE_SHORT_PREAMBLE is used. |
| 1514 | */ |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 1515 | rate = ieee80211_get_rts_cts_rate(sc->hw, tx_info); |
| 1516 | ctsrate = rate->hw_value; |
Sujith | c89424d | 2009-01-30 14:29:28 +0530 | [diff] [blame] | 1517 | if (sc->sc_flags & SC_OP_PREAMBLE_SHORT) |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 1518 | ctsrate |= rate->hw_value_short; |
Luis R. Rodriguez | 9674225 | 2008-12-23 15:58:38 -0800 | [diff] [blame] | 1519 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1520 | for (i = 0; i < 4; i++) { |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 1521 | bool is_40, is_sgi, is_sp; |
| 1522 | int phy; |
| 1523 | |
Sujith | e63835b | 2008-11-18 09:07:53 +0530 | [diff] [blame] | 1524 | if (!rates[i].count || (rates[i].idx < 0)) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1525 | continue; |
| 1526 | |
Sujith | a8efee4 | 2008-11-18 09:07:30 +0530 | [diff] [blame] | 1527 | rix = rates[i].idx; |
Sujith | a8efee4 | 2008-11-18 09:07:30 +0530 | [diff] [blame] | 1528 | series[i].Tries = rates[i].count; |
Luis R. Rodriguez | 43c2761 | 2009-09-13 21:07:07 -0700 | [diff] [blame] | 1529 | series[i].ChSel = common->tx_chainmask; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1530 | |
Felix Fietkau | 2703205 | 2010-01-17 21:08:50 +0100 | [diff] [blame] | 1531 | if ((sc->config.ath_aggr_prot && bf_isaggr(bf)) || |
| 1532 | (rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS)) { |
Sujith | c89424d | 2009-01-30 14:29:28 +0530 | [diff] [blame] | 1533 | series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; |
Felix Fietkau | 2703205 | 2010-01-17 21:08:50 +0100 | [diff] [blame] | 1534 | flags |= ATH9K_TXDESC_RTSENA; |
| 1535 | } else if (rates[i].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { |
| 1536 | series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; |
| 1537 | flags |= ATH9K_TXDESC_CTSENA; |
| 1538 | } |
| 1539 | |
Sujith | c89424d | 2009-01-30 14:29:28 +0530 | [diff] [blame] | 1540 | if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) |
| 1541 | series[i].RateFlags |= ATH9K_RATESERIES_2040; |
| 1542 | if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI) |
| 1543 | series[i].RateFlags |= ATH9K_RATESERIES_HALFGI; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1544 | |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 1545 | is_sgi = !!(rates[i].flags & IEEE80211_TX_RC_SHORT_GI); |
| 1546 | is_40 = !!(rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH); |
| 1547 | is_sp = !!(rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE); |
| 1548 | |
| 1549 | if (rates[i].flags & IEEE80211_TX_RC_MCS) { |
| 1550 | /* MCS rates */ |
| 1551 | series[i].Rate = rix | 0x80; |
| 1552 | series[i].PktDuration = ath_pkt_duration(sc, rix, bf, |
| 1553 | is_40, is_sgi, is_sp); |
Felix Fietkau | 074a8c0 | 2010-04-19 19:57:36 +0200 | [diff] [blame] | 1554 | if (rix < 8 && (tx_info->flags & IEEE80211_TX_CTL_STBC)) |
| 1555 | series[i].RateFlags |= ATH9K_RATESERIES_STBC; |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 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 | |
Felix Fietkau | 2703205 | 2010-01-17 21:08:50 +0100 | [diff] [blame] | 1579 | /* For AR5416 - RTS cannot be followed by a frame larger than 8K */ |
| 1580 | if (bf_isaggr(bf) && (bf->bf_al > sc->sc_ah->caps.rts_aggr_limit)) |
| 1581 | flags &= ~ATH9K_TXDESC_RTSENA; |
| 1582 | |
| 1583 | /* ATH9K_TXDESC_RTSENA and ATH9K_TXDESC_CTSENA are mutually exclusive. */ |
| 1584 | if (flags & ATH9K_TXDESC_RTSENA) |
| 1585 | flags &= ~ATH9K_TXDESC_CTSENA; |
| 1586 | |
Sujith | e63835b | 2008-11-18 09:07:53 +0530 | [diff] [blame] | 1587 | /* set dur_update_en for l-sig computation except for PS-Poll frames */ |
Sujith | c89424d | 2009-01-30 14:29:28 +0530 | [diff] [blame] | 1588 | ath9k_hw_set11n_ratescenario(sc->sc_ah, bf->bf_desc, |
| 1589 | bf->bf_lastbf->bf_desc, |
Sujith | 254ad0f | 2009-02-04 08:10:19 +0530 | [diff] [blame] | 1590 | !is_pspoll, ctsrate, |
Sujith | c89424d | 2009-01-30 14:29:28 +0530 | [diff] [blame] | 1591 | 0, series, 4, flags); |
Sujith | 102e057 | 2008-10-29 10:15:16 +0530 | [diff] [blame] | 1592 | |
Sujith | 17d7904 | 2009-02-09 13:27:03 +0530 | [diff] [blame] | 1593 | if (sc->config.ath_aggr_prot && flags) |
Sujith | c89424d | 2009-01-30 14:29:28 +0530 | [diff] [blame] | 1594 | ath9k_hw_set11n_burstduration(sc->sc_ah, bf->bf_desc, 8192); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1595 | } |
| 1596 | |
Jouni Malinen | c52f33d | 2009-03-03 19:23:29 +0200 | [diff] [blame] | 1597 | 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] | 1598 | struct sk_buff *skb, |
| 1599 | struct ath_tx_control *txctl) |
| 1600 | { |
Jouni Malinen | c52f33d | 2009-03-03 19:23:29 +0200 | [diff] [blame] | 1601 | struct ath_wiphy *aphy = hw->priv; |
| 1602 | struct ath_softc *sc = aphy->sc; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1603 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
| 1604 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1605 | int hdrlen; |
| 1606 | __le16 fc; |
Benoit Papillault | 1bc1488 | 2009-11-24 15:49:18 +0100 | [diff] [blame] | 1607 | int padpos, padsize; |
Luis R. Rodriguez | b0a3344 | 2010-04-15 17:39:39 -0400 | [diff] [blame] | 1608 | bool use_ldpc = false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1609 | |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 1610 | tx_info->pad[0] = 0; |
| 1611 | switch (txctl->frame_type) { |
Pavel Roskin | c81494d | 2010-03-31 18:05:25 -0400 | [diff] [blame] | 1612 | case ATH9K_IFT_NOT_INTERNAL: |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 1613 | break; |
Pavel Roskin | c81494d | 2010-03-31 18:05:25 -0400 | [diff] [blame] | 1614 | case ATH9K_IFT_PAUSE: |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 1615 | tx_info->pad[0] |= ATH_TX_INFO_FRAME_TYPE_PAUSE; |
| 1616 | /* fall through */ |
Pavel Roskin | c81494d | 2010-03-31 18:05:25 -0400 | [diff] [blame] | 1617 | case ATH9K_IFT_UNPAUSE: |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 1618 | tx_info->pad[0] |= ATH_TX_INFO_FRAME_TYPE_INTERNAL; |
| 1619 | break; |
| 1620 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1621 | hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
| 1622 | fc = hdr->frame_control; |
| 1623 | |
| 1624 | ATH_TXBUF_RESET(bf); |
| 1625 | |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 1626 | bf->aphy = aphy; |
Benoit Papillault | 1bc1488 | 2009-11-24 15:49:18 +0100 | [diff] [blame] | 1627 | bf->bf_frmlen = skb->len + FCS_LEN; |
| 1628 | /* Remove the padding size from bf_frmlen, if any */ |
| 1629 | padpos = ath9k_cmn_padpos(hdr->frame_control); |
| 1630 | padsize = padpos & 3; |
| 1631 | if (padsize && skb->len>padpos+padsize) { |
| 1632 | bf->bf_frmlen -= padsize; |
| 1633 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1634 | |
Felix Fietkau | 9f42c2b | 2010-06-12 00:34:01 -0400 | [diff] [blame] | 1635 | if (!txctl->paprd && conf_is_ht(&hw->conf)) { |
Sujith | c656bbb | 2009-01-16 21:38:56 +0530 | [diff] [blame] | 1636 | bf->bf_state.bf_type |= BUF_HT; |
Luis R. Rodriguez | b0a3344 | 2010-04-15 17:39:39 -0400 | [diff] [blame] | 1637 | if (tx_info->flags & IEEE80211_TX_CTL_LDPC) |
| 1638 | use_ldpc = true; |
| 1639 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1640 | |
Felix Fietkau | 9f42c2b | 2010-06-12 00:34:01 -0400 | [diff] [blame] | 1641 | bf->bf_state.bfs_paprd = txctl->paprd; |
Vasanthakumar Thiagarajan | ca369eb | 2010-06-24 02:42:44 -0700 | [diff] [blame] | 1642 | if (txctl->paprd) |
| 1643 | bf->bf_state.bfs_paprd_timestamp = jiffies; |
Luis R. Rodriguez | b0a3344 | 2010-04-15 17:39:39 -0400 | [diff] [blame] | 1644 | bf->bf_flags = setup_tx_flags(skb, use_ldpc); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1645 | |
Luis R. Rodriguez | c17512d | 2010-08-05 17:56:54 -0400 | [diff] [blame] | 1646 | bf->bf_keytype = ath9k_cmn_get_hw_crypto_keytype(skb); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1647 | if (bf->bf_keytype != ATH9K_KEY_TYPE_CLEAR) { |
| 1648 | bf->bf_frmlen += tx_info->control.hw_key->icv_len; |
| 1649 | bf->bf_keyix = tx_info->control.hw_key->hw_key_idx; |
| 1650 | } else { |
| 1651 | bf->bf_keyix = ATH9K_TXKEYIX_INVALID; |
| 1652 | } |
| 1653 | |
Sujith | 17b182e | 2009-12-14 14:56:56 +0530 | [diff] [blame] | 1654 | if (ieee80211_is_data_qos(fc) && bf_isht(bf) && |
| 1655 | (sc->sc_flags & SC_OP_TXAGGR)) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1656 | assign_aggr_tid_seqno(skb, bf); |
| 1657 | |
| 1658 | bf->bf_mpdu = skb; |
| 1659 | |
| 1660 | bf->bf_dmacontext = dma_map_single(sc->dev, skb->data, |
| 1661 | skb->len, DMA_TO_DEVICE); |
| 1662 | if (unlikely(dma_mapping_error(sc->dev, bf->bf_dmacontext))) { |
| 1663 | bf->bf_mpdu = NULL; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1664 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL, |
| 1665 | "dma_mapping_error() on TX\n"); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1666 | return -ENOMEM; |
| 1667 | } |
| 1668 | |
| 1669 | bf->bf_buf_addr = bf->bf_dmacontext; |
Luis R. Rodriguez | e7824a5 | 2009-11-24 02:53:25 -0500 | [diff] [blame] | 1670 | |
| 1671 | /* tag if this is a nullfunc frame to enable PS when AP acks it */ |
| 1672 | if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc)) { |
| 1673 | bf->bf_isnullfunc = true; |
Sujith | 1b04b93 | 2010-01-08 10:36:05 +0530 | [diff] [blame] | 1674 | sc->ps_flags &= ~PS_NULLFUNC_COMPLETED; |
Luis R. Rodriguez | e7824a5 | 2009-11-24 02:53:25 -0500 | [diff] [blame] | 1675 | } else |
| 1676 | bf->bf_isnullfunc = false; |
| 1677 | |
Vasanthakumar Thiagarajan | 7c9fd60 | 2010-05-26 19:06:53 -0700 | [diff] [blame] | 1678 | bf->bf_tx_aborted = false; |
| 1679 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1680 | return 0; |
| 1681 | } |
| 1682 | |
| 1683 | /* FIXME: tx power */ |
| 1684 | static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf, |
| 1685 | struct ath_tx_control *txctl) |
| 1686 | { |
Sujith | a22be22 | 2009-03-30 15:28:36 +0530 | [diff] [blame] | 1687 | struct sk_buff *skb = bf->bf_mpdu; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1688 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 1689 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1690 | struct ath_node *an = NULL; |
| 1691 | struct list_head bf_head; |
| 1692 | struct ath_desc *ds; |
| 1693 | struct ath_atx_tid *tid; |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 1694 | struct ath_hw *ah = sc->sc_ah; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1695 | int frm_type; |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 1696 | __le16 fc; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1697 | |
| 1698 | frm_type = get_hw_packet_type(skb); |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 1699 | fc = hdr->frame_control; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1700 | |
| 1701 | INIT_LIST_HEAD(&bf_head); |
| 1702 | list_add_tail(&bf->list, &bf_head); |
| 1703 | |
| 1704 | ds = bf->bf_desc; |
Vasanthakumar Thiagarajan | 87d5efb | 2010-04-15 17:38:43 -0400 | [diff] [blame] | 1705 | ath9k_hw_set_desc_link(ah, ds, 0); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1706 | |
| 1707 | ath9k_hw_set11n_txdesc(ah, ds, bf->bf_frmlen, frm_type, MAX_RATE_POWER, |
| 1708 | bf->bf_keyix, bf->bf_keytype, bf->bf_flags); |
| 1709 | |
| 1710 | ath9k_hw_filltxdesc(ah, ds, |
| 1711 | skb->len, /* segment length */ |
| 1712 | true, /* first segment */ |
| 1713 | true, /* last segment */ |
Vasanthakumar Thiagarajan | 3f3a1c8 | 2010-04-15 17:38:42 -0400 | [diff] [blame] | 1714 | ds, /* first descriptor */ |
Vasanthakumar Thiagarajan | cc610ac0 | 2010-04-15 17:39:26 -0400 | [diff] [blame] | 1715 | bf->bf_buf_addr, |
| 1716 | txctl->txq->axq_qnum); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1717 | |
Felix Fietkau | 9f42c2b | 2010-06-12 00:34:01 -0400 | [diff] [blame] | 1718 | if (bf->bf_state.bfs_paprd) |
| 1719 | ar9003_hw_set_paprd_txdesc(ah, ds, bf->bf_state.bfs_paprd); |
| 1720 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1721 | spin_lock_bh(&txctl->txq->axq_lock); |
| 1722 | |
| 1723 | if (bf_isht(bf) && (sc->sc_flags & SC_OP_TXAGGR) && |
| 1724 | tx_info->control.sta) { |
| 1725 | an = (struct ath_node *)tx_info->control.sta->drv_priv; |
| 1726 | tid = ATH_AN_2_TID(an, bf->bf_tidno); |
| 1727 | |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 1728 | if (!ieee80211_is_data_qos(fc)) { |
| 1729 | ath_tx_send_normal(sc, txctl->txq, &bf_head); |
| 1730 | goto tx_done; |
| 1731 | } |
| 1732 | |
Felix Fietkau | 4fdec03 | 2010-03-12 04:02:43 +0100 | [diff] [blame] | 1733 | if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1734 | /* |
| 1735 | * Try aggregation if it's a unicast data frame |
| 1736 | * and the destination is HT capable. |
| 1737 | */ |
| 1738 | ath_tx_send_ampdu(sc, tid, &bf_head, txctl); |
| 1739 | } else { |
| 1740 | /* |
| 1741 | * Send this frame as regular when ADDBA |
| 1742 | * exchange is neither complete nor pending. |
| 1743 | */ |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 1744 | ath_tx_send_ht_normal(sc, txctl->txq, |
| 1745 | tid, &bf_head); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1746 | } |
| 1747 | } else { |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 1748 | ath_tx_send_normal(sc, txctl->txq, &bf_head); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1749 | } |
| 1750 | |
Sujith | c37452b | 2009-03-09 09:31:57 +0530 | [diff] [blame] | 1751 | tx_done: |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1752 | spin_unlock_bh(&txctl->txq->axq_lock); |
| 1753 | } |
| 1754 | |
| 1755 | /* Upon failure caller should free skb */ |
Jouni Malinen | c52f33d | 2009-03-03 19:23:29 +0200 | [diff] [blame] | 1756 | int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb, |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1757 | struct ath_tx_control *txctl) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1758 | { |
Jouni Malinen | c52f33d | 2009-03-03 19:23:29 +0200 | [diff] [blame] | 1759 | struct ath_wiphy *aphy = hw->priv; |
| 1760 | struct ath_softc *sc = aphy->sc; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1761 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
Felix Fietkau | 84642d6 | 2010-06-01 21:33:13 +0200 | [diff] [blame] | 1762 | struct ath_txq *txq = txctl->txq; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1763 | struct ath_buf *bf; |
Felix Fietkau | 97923b1 | 2010-06-12 00:33:55 -0400 | [diff] [blame] | 1764 | int q, r; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1765 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1766 | bf = ath_tx_get_buffer(sc); |
| 1767 | if (!bf) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1768 | ath_print(common, ATH_DBG_XMIT, "TX buffers are full\n"); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1769 | return -1; |
| 1770 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1771 | |
Jouni Malinen | c52f33d | 2009-03-03 19:23:29 +0200 | [diff] [blame] | 1772 | r = ath_tx_setup_buffer(hw, bf, skb, txctl); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1773 | if (unlikely(r)) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1774 | ath_print(common, ATH_DBG_FATAL, "TX mem alloc failure\n"); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1775 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1776 | /* upon ath_tx_processq() this TX queue will be resumed, we |
| 1777 | * guarantee this will happen by knowing beforehand that |
| 1778 | * we will at least have to run TX completionon one buffer |
| 1779 | * on the queue */ |
| 1780 | spin_lock_bh(&txq->axq_lock); |
Felix Fietkau | 84642d6 | 2010-06-01 21:33:13 +0200 | [diff] [blame] | 1781 | if (!txq->stopped && txq->axq_depth > 1) { |
Luis R. Rodriguez | f52de03 | 2009-11-02 17:09:12 -0800 | [diff] [blame] | 1782 | ath_mac80211_stop_queue(sc, skb_get_queue_mapping(skb)); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1783 | txq->stopped = 1; |
| 1784 | } |
| 1785 | spin_unlock_bh(&txq->axq_lock); |
| 1786 | |
Felix Fietkau | 0a8cea8 | 2010-04-19 19:57:30 +0200 | [diff] [blame] | 1787 | ath_tx_return_buffer(sc, bf); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1788 | |
| 1789 | return r; |
| 1790 | } |
| 1791 | |
Felix Fietkau | 97923b1 | 2010-06-12 00:33:55 -0400 | [diff] [blame] | 1792 | q = skb_get_queue_mapping(skb); |
| 1793 | if (q >= 4) |
| 1794 | q = 0; |
| 1795 | |
| 1796 | spin_lock_bh(&txq->axq_lock); |
| 1797 | if (++sc->tx.pending_frames[q] > ATH_MAX_QDEPTH && !txq->stopped) { |
| 1798 | ath_mac80211_stop_queue(sc, skb_get_queue_mapping(skb)); |
| 1799 | txq->stopped = 1; |
| 1800 | } |
| 1801 | spin_unlock_bh(&txq->axq_lock); |
| 1802 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1803 | ath_tx_start_dma(sc, bf, txctl); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1804 | |
| 1805 | return 0; |
| 1806 | } |
| 1807 | |
Jouni Malinen | c52f33d | 2009-03-03 19:23:29 +0200 | [diff] [blame] | 1808 | 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] | 1809 | { |
Jouni Malinen | c52f33d | 2009-03-03 19:23:29 +0200 | [diff] [blame] | 1810 | struct ath_wiphy *aphy = hw->priv; |
| 1811 | struct ath_softc *sc = aphy->sc; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1812 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
Benoit Papillault | 4d91f9f | 2009-12-12 00:22:35 +0100 | [diff] [blame] | 1813 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 1814 | int padpos, padsize; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1815 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
| 1816 | struct ath_tx_control txctl; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1817 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1818 | memset(&txctl, 0, sizeof(struct ath_tx_control)); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1819 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1820 | /* |
| 1821 | * As a temporary workaround, assign seq# here; this will likely need |
| 1822 | * to be cleaned up to work better with Beacon transmission and virtual |
| 1823 | * BSSes. |
| 1824 | */ |
| 1825 | if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1826 | if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) |
| 1827 | sc->tx.seq_no += 0x10; |
| 1828 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); |
| 1829 | hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1830 | } |
| 1831 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1832 | /* Add the padding after the header if this is not already done */ |
Benoit Papillault | 4d91f9f | 2009-12-12 00:22:35 +0100 | [diff] [blame] | 1833 | padpos = ath9k_cmn_padpos(hdr->frame_control); |
| 1834 | padsize = padpos & 3; |
| 1835 | if (padsize && skb->len>padpos) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1836 | if (skb_headroom(skb) < padsize) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1837 | ath_print(common, ATH_DBG_XMIT, |
| 1838 | "TX CABQ padding failed\n"); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1839 | dev_kfree_skb_any(skb); |
| 1840 | return; |
| 1841 | } |
| 1842 | skb_push(skb, padsize); |
Benoit Papillault | 4d91f9f | 2009-12-12 00:22:35 +0100 | [diff] [blame] | 1843 | memmove(skb->data, skb->data + padsize, padpos); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1844 | } |
| 1845 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1846 | txctl.txq = sc->beacon.cabq; |
| 1847 | |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1848 | ath_print(common, ATH_DBG_XMIT, |
| 1849 | "transmitting CABQ packet, skb: %p\n", skb); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1850 | |
Jouni Malinen | c52f33d | 2009-03-03 19:23:29 +0200 | [diff] [blame] | 1851 | if (ath_tx_start(hw, skb, &txctl) != 0) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1852 | ath_print(common, ATH_DBG_XMIT, "CABQ TX failed\n"); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1853 | goto exit; |
| 1854 | } |
| 1855 | |
| 1856 | return; |
| 1857 | exit: |
| 1858 | dev_kfree_skb_any(skb); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1859 | } |
| 1860 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1861 | /*****************/ |
| 1862 | /* TX Completion */ |
| 1863 | /*****************/ |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1864 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1865 | 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] | 1866 | struct ath_wiphy *aphy, int tx_flags) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1867 | { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1868 | struct ieee80211_hw *hw = sc->hw; |
| 1869 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1870 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
Benoit Papillault | 4d91f9f | 2009-12-12 00:22:35 +0100 | [diff] [blame] | 1871 | struct ieee80211_hdr * hdr = (struct ieee80211_hdr *)skb->data; |
Felix Fietkau | 97923b1 | 2010-06-12 00:33:55 -0400 | [diff] [blame] | 1872 | int q, padpos, padsize; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1873 | |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1874 | ath_print(common, ATH_DBG_XMIT, "TX complete: skb: %p\n", skb); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1875 | |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 1876 | if (aphy) |
| 1877 | hw = aphy->hw; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1878 | |
Vasanthakumar Thiagarajan | 6b2c403 | 2009-03-20 15:27:50 +0530 | [diff] [blame] | 1879 | if (tx_flags & ATH_TX_BAR) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1880 | tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1881 | |
Vasanthakumar Thiagarajan | 6b2c403 | 2009-03-20 15:27:50 +0530 | [diff] [blame] | 1882 | if (!(tx_flags & (ATH_TX_ERROR | ATH_TX_XRETRY))) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1883 | /* Frame was ACKed */ |
| 1884 | tx_info->flags |= IEEE80211_TX_STAT_ACK; |
| 1885 | } |
| 1886 | |
Benoit Papillault | 4d91f9f | 2009-12-12 00:22:35 +0100 | [diff] [blame] | 1887 | padpos = ath9k_cmn_padpos(hdr->frame_control); |
| 1888 | padsize = padpos & 3; |
| 1889 | if (padsize && skb->len>padpos+padsize) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1890 | /* |
| 1891 | * Remove MAC header padding before giving the frame back to |
| 1892 | * mac80211. |
| 1893 | */ |
Benoit Papillault | 4d91f9f | 2009-12-12 00:22:35 +0100 | [diff] [blame] | 1894 | memmove(skb->data + padsize, skb->data, padpos); |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1895 | skb_pull(skb, padsize); |
| 1896 | } |
| 1897 | |
Sujith | 1b04b93 | 2010-01-08 10:36:05 +0530 | [diff] [blame] | 1898 | if (sc->ps_flags & PS_WAIT_FOR_TX_ACK) { |
| 1899 | sc->ps_flags &= ~PS_WAIT_FOR_TX_ACK; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 1900 | ath_print(common, ATH_DBG_PS, |
| 1901 | "Going back to sleep after having " |
Pavel Roskin | f643e51 | 2010-01-29 17:22:12 -0500 | [diff] [blame] | 1902 | "received TX status (0x%lx)\n", |
Sujith | 1b04b93 | 2010-01-08 10:36:05 +0530 | [diff] [blame] | 1903 | sc->ps_flags & (PS_WAIT_FOR_BEACON | |
| 1904 | PS_WAIT_FOR_CAB | |
| 1905 | PS_WAIT_FOR_PSPOLL_DATA | |
| 1906 | PS_WAIT_FOR_TX_ACK)); |
Jouni Malinen | 9a23f9c | 2009-05-19 17:01:38 +0300 | [diff] [blame] | 1907 | } |
| 1908 | |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 1909 | if (unlikely(tx_info->pad[0] & ATH_TX_INFO_FRAME_TYPE_INTERNAL)) |
Jouni Malinen | f0ed85c | 2009-03-03 19:23:31 +0200 | [diff] [blame] | 1910 | ath9k_tx_status(hw, skb); |
Felix Fietkau | 97923b1 | 2010-06-12 00:33:55 -0400 | [diff] [blame] | 1911 | else { |
| 1912 | q = skb_get_queue_mapping(skb); |
| 1913 | if (q >= 4) |
| 1914 | q = 0; |
| 1915 | |
| 1916 | if (--sc->tx.pending_frames[q] < 0) |
| 1917 | sc->tx.pending_frames[q] = 0; |
| 1918 | |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 1919 | ieee80211_tx_status(hw, skb); |
Felix Fietkau | 97923b1 | 2010-06-12 00:33:55 -0400 | [diff] [blame] | 1920 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1921 | } |
| 1922 | |
| 1923 | static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 1924 | struct ath_txq *txq, struct list_head *bf_q, |
| 1925 | struct ath_tx_status *ts, int txok, int sendbar) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1926 | { |
| 1927 | struct sk_buff *skb = bf->bf_mpdu; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1928 | unsigned long flags; |
Vasanthakumar Thiagarajan | 6b2c403 | 2009-03-20 15:27:50 +0530 | [diff] [blame] | 1929 | int tx_flags = 0; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1930 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1931 | if (sendbar) |
Vasanthakumar Thiagarajan | 6b2c403 | 2009-03-20 15:27:50 +0530 | [diff] [blame] | 1932 | tx_flags = ATH_TX_BAR; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1933 | |
| 1934 | if (!txok) { |
Vasanthakumar Thiagarajan | 6b2c403 | 2009-03-20 15:27:50 +0530 | [diff] [blame] | 1935 | tx_flags |= ATH_TX_ERROR; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1936 | |
| 1937 | if (bf_isxretried(bf)) |
Vasanthakumar Thiagarajan | 6b2c403 | 2009-03-20 15:27:50 +0530 | [diff] [blame] | 1938 | tx_flags |= ATH_TX_XRETRY; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1939 | } |
| 1940 | |
| 1941 | dma_unmap_single(sc->dev, bf->bf_dmacontext, skb->len, DMA_TO_DEVICE); |
Felix Fietkau | 9f42c2b | 2010-06-12 00:34:01 -0400 | [diff] [blame] | 1942 | |
| 1943 | if (bf->bf_state.bfs_paprd) { |
Vasanthakumar Thiagarajan | ca369eb | 2010-06-24 02:42:44 -0700 | [diff] [blame] | 1944 | if (time_after(jiffies, |
| 1945 | bf->bf_state.bfs_paprd_timestamp + |
Vasanthakumar Thiagarajan | 78a1817 | 2010-06-24 02:42:46 -0700 | [diff] [blame] | 1946 | msecs_to_jiffies(ATH_PAPRD_TIMEOUT))) |
Vasanthakumar Thiagarajan | ca369eb | 2010-06-24 02:42:44 -0700 | [diff] [blame] | 1947 | dev_kfree_skb_any(skb); |
Vasanthakumar Thiagarajan | 78a1817 | 2010-06-24 02:42:46 -0700 | [diff] [blame] | 1948 | else |
Vasanthakumar Thiagarajan | ca369eb | 2010-06-24 02:42:44 -0700 | [diff] [blame] | 1949 | complete(&sc->paprd_complete); |
Felix Fietkau | 9f42c2b | 2010-06-12 00:34:01 -0400 | [diff] [blame] | 1950 | } else { |
| 1951 | ath_tx_complete(sc, skb, bf->aphy, tx_flags); |
| 1952 | ath_debug_stat_tx(sc, txq, bf, ts); |
| 1953 | } |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1954 | |
| 1955 | /* |
| 1956 | * Return the list of ath_buf of this mpdu to free queue |
| 1957 | */ |
| 1958 | spin_lock_irqsave(&sc->tx.txbuflock, flags); |
| 1959 | list_splice_tail_init(bf_q, &sc->tx.txbuf); |
| 1960 | spin_unlock_irqrestore(&sc->tx.txbuflock, flags); |
| 1961 | } |
| 1962 | |
| 1963 | static int ath_tx_num_badfrms(struct ath_softc *sc, struct ath_buf *bf, |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 1964 | struct ath_tx_status *ts, int txok) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1965 | { |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1966 | u16 seq_st = 0; |
| 1967 | u32 ba[WME_BA_BMP_SIZE >> 5]; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1968 | int ba_index; |
| 1969 | int nbad = 0; |
| 1970 | int isaggr = 0; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1971 | |
Vasanthakumar Thiagarajan | 7c9fd60 | 2010-05-26 19:06:53 -0700 | [diff] [blame] | 1972 | if (bf->bf_lastbf->bf_tx_aborted) |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1973 | return 0; |
Sujith | 528f0c6 | 2008-10-29 10:14:26 +0530 | [diff] [blame] | 1974 | |
Sujith | cd3d39a | 2008-08-11 14:03:34 +0530 | [diff] [blame] | 1975 | isaggr = bf_isaggr(bf); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1976 | if (isaggr) { |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 1977 | seq_st = ts->ts_seqnum; |
| 1978 | memcpy(ba, &ts->ba_low, WME_BA_BMP_SIZE >> 3); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1979 | } |
| 1980 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1981 | while (bf) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1982 | ba_index = ATH_BA_INDEX(seq_st, bf->bf_seqno); |
| 1983 | if (!txok || (isaggr && !ATH_BA_ISSET(ba, ba_index))) |
| 1984 | nbad++; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1985 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1986 | bf = bf->bf_next; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1987 | } |
| 1988 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 1989 | return nbad; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 1990 | } |
| 1991 | |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 1992 | static void ath_tx_rc_status(struct ath_buf *bf, struct ath_tx_status *ts, |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 1993 | int nbad, int txok, bool update_rc) |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 1994 | { |
Sujith | a22be22 | 2009-03-30 15:28:36 +0530 | [diff] [blame] | 1995 | struct sk_buff *skb = bf->bf_mpdu; |
Sujith | 254ad0f | 2009-02-04 08:10:19 +0530 | [diff] [blame] | 1996 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 1997 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 1998 | struct ieee80211_hw *hw = bf->aphy->hw; |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 1999 | u8 i, tx_rateindex; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2000 | |
Sujith | 95e4acb | 2009-03-13 08:56:09 +0530 | [diff] [blame] | 2001 | if (txok) |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 2002 | tx_info->status.ack_signal = ts->ts_rssi; |
Sujith | 95e4acb | 2009-03-13 08:56:09 +0530 | [diff] [blame] | 2003 | |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 2004 | tx_rateindex = ts->ts_rateindex; |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 2005 | WARN_ON(tx_rateindex >= hw->max_rates); |
| 2006 | |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 2007 | if (ts->ts_status & ATH9K_TXERR_FILT) |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2008 | tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED; |
Felix Fietkau | d969847 | 2010-03-01 13:32:11 +0100 | [diff] [blame] | 2009 | if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && update_rc) |
| 2010 | tx_info->flags |= IEEE80211_TX_STAT_AMPDU; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2011 | |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 2012 | if ((ts->ts_status & ATH9K_TXERR_FILT) == 0 && |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 2013 | (bf->bf_flags & ATH9K_TXDESC_NOACK) == 0 && update_rc) { |
Sujith | 254ad0f | 2009-02-04 08:10:19 +0530 | [diff] [blame] | 2014 | if (ieee80211_is_data(hdr->frame_control)) { |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 2015 | if (ts->ts_flags & |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 2016 | (ATH9K_TX_DATA_UNDERRUN | ATH9K_TX_DELIM_UNDERRUN)) |
| 2017 | tx_info->pad[0] |= ATH_TX_INFO_UNDERRUN; |
Felix Fietkau | db1a052 | 2010-03-29 20:07:11 -0700 | [diff] [blame] | 2018 | if ((ts->ts_status & ATH9K_TXERR_XRETRY) || |
| 2019 | (ts->ts_status & ATH9K_TXERR_FIFO)) |
Felix Fietkau | 827e69b | 2009-11-15 23:09:25 +0100 | [diff] [blame] | 2020 | tx_info->pad[0] |= ATH_TX_INFO_XRETRY; |
| 2021 | tx_info->status.ampdu_len = bf->bf_nframes; |
| 2022 | tx_info->status.ampdu_ack_len = bf->bf_nframes - nbad; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2023 | } |
| 2024 | } |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 2025 | |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 2026 | for (i = tx_rateindex + 1; i < hw->max_rates; i++) { |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 2027 | tx_info->status.rates[i].count = 0; |
Felix Fietkau | 545750d | 2009-11-23 22:21:01 +0100 | [diff] [blame] | 2028 | tx_info->status.rates[i].idx = -1; |
| 2029 | } |
Vasanthakumar Thiagarajan | 8a92e2e | 2009-03-20 15:27:49 +0530 | [diff] [blame] | 2030 | |
Felix Fietkau | 78c4653 | 2010-06-25 01:26:16 +0200 | [diff] [blame] | 2031 | tx_info->status.rates[tx_rateindex].count = ts->ts_longretry + 1; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2032 | } |
| 2033 | |
Sujith | 059d806 | 2009-01-16 21:38:49 +0530 | [diff] [blame] | 2034 | static void ath_wake_mac80211_queue(struct ath_softc *sc, struct ath_txq *txq) |
| 2035 | { |
| 2036 | int qnum; |
| 2037 | |
Felix Fietkau | 97923b1 | 2010-06-12 00:33:55 -0400 | [diff] [blame] | 2038 | qnum = ath_get_mac80211_qnum(txq->axq_class, sc); |
| 2039 | if (qnum == -1) |
| 2040 | return; |
| 2041 | |
Sujith | 059d806 | 2009-01-16 21:38:49 +0530 | [diff] [blame] | 2042 | spin_lock_bh(&txq->axq_lock); |
Felix Fietkau | 97923b1 | 2010-06-12 00:33:55 -0400 | [diff] [blame] | 2043 | if (txq->stopped && sc->tx.pending_frames[qnum] < ATH_MAX_QDEPTH) { |
Vasanthakumar Thiagarajan | 68e8f2f | 2010-07-22 02:24:11 -0700 | [diff] [blame] | 2044 | if (ath_mac80211_start_queue(sc, qnum)) |
| 2045 | txq->stopped = 0; |
Sujith | 059d806 | 2009-01-16 21:38:49 +0530 | [diff] [blame] | 2046 | } |
| 2047 | spin_unlock_bh(&txq->axq_lock); |
| 2048 | } |
| 2049 | |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2050 | 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] | 2051 | { |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 2052 | struct ath_hw *ah = sc->sc_ah; |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 2053 | struct ath_common *common = ath9k_hw_common(ah); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2054 | struct ath_buf *bf, *lastbf, *bf_held = NULL; |
| 2055 | struct list_head bf_head; |
Sujith | c428839 | 2008-11-18 09:09:30 +0530 | [diff] [blame] | 2056 | struct ath_desc *ds; |
Felix Fietkau | 29bffa9 | 2010-03-29 20:14:23 -0700 | [diff] [blame] | 2057 | struct ath_tx_status ts; |
Vasanthakumar Thiagarajan | 0934af2 | 2009-03-18 20:22:00 +0530 | [diff] [blame] | 2058 | int txok; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2059 | int status; |
| 2060 | |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 2061 | ath_print(common, ATH_DBG_QUEUE, "tx queue %d (%x), link %p\n", |
| 2062 | txq->axq_qnum, ath9k_hw_gettxbuf(sc->sc_ah, txq->axq_qnum), |
| 2063 | txq->axq_link); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2064 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2065 | for (;;) { |
| 2066 | spin_lock_bh(&txq->axq_lock); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2067 | if (list_empty(&txq->axq_q)) { |
| 2068 | txq->axq_link = NULL; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2069 | spin_unlock_bh(&txq->axq_lock); |
| 2070 | break; |
| 2071 | } |
| 2072 | bf = list_first_entry(&txq->axq_q, struct ath_buf, list); |
| 2073 | |
| 2074 | /* |
| 2075 | * There is a race condition that a BH gets scheduled |
| 2076 | * after sw writes TxE and before hw re-load the last |
| 2077 | * descriptor to get the newly chained one. |
| 2078 | * Software must keep the last DONE descriptor as a |
| 2079 | * holding descriptor - software does so by marking |
| 2080 | * it with the STALE flag. |
| 2081 | */ |
| 2082 | bf_held = NULL; |
Sujith | a119cc4 | 2009-03-30 15:28:38 +0530 | [diff] [blame] | 2083 | if (bf->bf_stale) { |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2084 | bf_held = bf; |
| 2085 | if (list_is_last(&bf_held->list, &txq->axq_q)) { |
Sujith | 6ef9b13 | 2009-01-16 21:38:51 +0530 | [diff] [blame] | 2086 | spin_unlock_bh(&txq->axq_lock); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2087 | break; |
| 2088 | } else { |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2089 | bf = list_entry(bf_held->list.next, |
Sujith | 6ef9b13 | 2009-01-16 21:38:51 +0530 | [diff] [blame] | 2090 | struct ath_buf, list); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2091 | } |
| 2092 | } |
| 2093 | |
| 2094 | lastbf = bf->bf_lastbf; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2095 | ds = lastbf->bf_desc; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2096 | |
Felix Fietkau | 29bffa9 | 2010-03-29 20:14:23 -0700 | [diff] [blame] | 2097 | memset(&ts, 0, sizeof(ts)); |
| 2098 | status = ath9k_hw_txprocdesc(ah, ds, &ts); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2099 | if (status == -EINPROGRESS) { |
| 2100 | spin_unlock_bh(&txq->axq_lock); |
| 2101 | break; |
| 2102 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2103 | |
| 2104 | /* |
Luis R. Rodriguez | e7824a5 | 2009-11-24 02:53:25 -0500 | [diff] [blame] | 2105 | * We now know the nullfunc frame has been ACKed so we |
| 2106 | * can disable RX. |
| 2107 | */ |
| 2108 | if (bf->bf_isnullfunc && |
Felix Fietkau | 29bffa9 | 2010-03-29 20:14:23 -0700 | [diff] [blame] | 2109 | (ts.ts_status & ATH9K_TX_ACKED)) { |
Senthil Balasubramanian | 3f7c5c1 | 2010-02-03 22:51:13 +0530 | [diff] [blame] | 2110 | if ((sc->ps_flags & PS_ENABLED)) |
| 2111 | ath9k_enable_ps(sc); |
| 2112 | else |
Sujith | 1b04b93 | 2010-01-08 10:36:05 +0530 | [diff] [blame] | 2113 | sc->ps_flags |= PS_NULLFUNC_COMPLETED; |
Luis R. Rodriguez | e7824a5 | 2009-11-24 02:53:25 -0500 | [diff] [blame] | 2114 | } |
| 2115 | |
| 2116 | /* |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2117 | * Remove ath_buf's of the same transmit unit from txq, |
| 2118 | * however leave the last descriptor back as the holding |
| 2119 | * descriptor for hw. |
| 2120 | */ |
Sujith | a119cc4 | 2009-03-30 15:28:38 +0530 | [diff] [blame] | 2121 | lastbf->bf_stale = true; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2122 | INIT_LIST_HEAD(&bf_head); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2123 | if (!list_is_singular(&lastbf->list)) |
| 2124 | list_cut_position(&bf_head, |
| 2125 | &txq->axq_q, lastbf->list.prev); |
| 2126 | |
| 2127 | txq->axq_depth--; |
Felix Fietkau | 29bffa9 | 2010-03-29 20:14:23 -0700 | [diff] [blame] | 2128 | txok = !(ts.ts_status & ATH9K_TXERR_MASK); |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 2129 | txq->axq_tx_inprogress = false; |
Felix Fietkau | 0a8cea8 | 2010-04-19 19:57:30 +0200 | [diff] [blame] | 2130 | if (bf_held) |
| 2131 | list_del(&bf_held->list); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2132 | spin_unlock_bh(&txq->axq_lock); |
| 2133 | |
Felix Fietkau | 0a8cea8 | 2010-04-19 19:57:30 +0200 | [diff] [blame] | 2134 | if (bf_held) |
| 2135 | ath_tx_return_buffer(sc, bf_held); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2136 | |
Sujith | cd3d39a | 2008-08-11 14:03:34 +0530 | [diff] [blame] | 2137 | if (!bf_isampdu(bf)) { |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2138 | /* |
| 2139 | * This frame is sent out as a single frame. |
| 2140 | * Use hardware retry status for this frame. |
| 2141 | */ |
Felix Fietkau | 29bffa9 | 2010-03-29 20:14:23 -0700 | [diff] [blame] | 2142 | if (ts.ts_status & ATH9K_TXERR_XRETRY) |
Sujith | cd3d39a | 2008-08-11 14:03:34 +0530 | [diff] [blame] | 2143 | bf->bf_state.bf_type |= BUF_XRETRY; |
Felix Fietkau | 29bffa9 | 2010-03-29 20:14:23 -0700 | [diff] [blame] | 2144 | ath_tx_rc_status(bf, &ts, 0, txok, true); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2145 | } |
Johannes Berg | e6a9854 | 2008-10-21 12:40:02 +0200 | [diff] [blame] | 2146 | |
Sujith | cd3d39a | 2008-08-11 14:03:34 +0530 | [diff] [blame] | 2147 | if (bf_isampdu(bf)) |
Felix Fietkau | 29bffa9 | 2010-03-29 20:14:23 -0700 | [diff] [blame] | 2148 | ath_tx_complete_aggr(sc, txq, bf, &bf_head, &ts, txok); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2149 | else |
Felix Fietkau | 29bffa9 | 2010-03-29 20:14:23 -0700 | [diff] [blame] | 2150 | ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, txok, 0); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2151 | |
Sujith | 059d806 | 2009-01-16 21:38:49 +0530 | [diff] [blame] | 2152 | ath_wake_mac80211_queue(sc, txq); |
| 2153 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2154 | spin_lock_bh(&txq->axq_lock); |
Sujith | 672840a | 2008-08-11 14:05:08 +0530 | [diff] [blame] | 2155 | if (sc->sc_flags & SC_OP_TXAGGR) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2156 | ath_txq_schedule(sc, txq); |
| 2157 | spin_unlock_bh(&txq->axq_lock); |
| 2158 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2159 | } |
| 2160 | |
Sujith | 305fe47 | 2009-07-23 15:32:29 +0530 | [diff] [blame] | 2161 | static void ath_tx_complete_poll_work(struct work_struct *work) |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 2162 | { |
| 2163 | struct ath_softc *sc = container_of(work, struct ath_softc, |
| 2164 | tx_complete_work.work); |
| 2165 | struct ath_txq *txq; |
| 2166 | int i; |
| 2167 | bool needreset = false; |
| 2168 | |
| 2169 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) |
| 2170 | if (ATH_TXQ_SETUP(sc, i)) { |
| 2171 | txq = &sc->tx.txq[i]; |
| 2172 | spin_lock_bh(&txq->axq_lock); |
| 2173 | if (txq->axq_depth) { |
| 2174 | if (txq->axq_tx_inprogress) { |
| 2175 | needreset = true; |
| 2176 | spin_unlock_bh(&txq->axq_lock); |
| 2177 | break; |
| 2178 | } else { |
| 2179 | txq->axq_tx_inprogress = true; |
| 2180 | } |
| 2181 | } |
| 2182 | spin_unlock_bh(&txq->axq_lock); |
| 2183 | } |
| 2184 | |
| 2185 | if (needreset) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 2186 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_RESET, |
| 2187 | "tx hung, resetting the chip\n"); |
Sujith | 332c556 | 2009-10-09 09:51:28 +0530 | [diff] [blame] | 2188 | ath9k_ps_wakeup(sc); |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 2189 | ath_reset(sc, false); |
Sujith | 332c556 | 2009-10-09 09:51:28 +0530 | [diff] [blame] | 2190 | ath9k_ps_restore(sc); |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 2191 | } |
| 2192 | |
Luis R. Rodriguez | 42935ec | 2009-07-29 20:08:07 -0400 | [diff] [blame] | 2193 | ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 2194 | msecs_to_jiffies(ATH_TX_COMPLETE_POLL_INT)); |
| 2195 | } |
| 2196 | |
| 2197 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2198 | |
| 2199 | void ath_tx_tasklet(struct ath_softc *sc) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2200 | { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2201 | int i; |
| 2202 | u32 qcumask = ((1 << ATH9K_NUM_TX_QUEUES) - 1); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2203 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2204 | ath9k_hw_gettxintrtxqs(sc->sc_ah, &qcumask); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2205 | |
| 2206 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2207 | if (ATH_TXQ_SETUP(sc, i) && (qcumask & (1 << i))) |
| 2208 | ath_tx_processq(sc, &sc->tx.txq[i]); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2209 | } |
| 2210 | } |
| 2211 | |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2212 | void ath_tx_edma_tasklet(struct ath_softc *sc) |
| 2213 | { |
| 2214 | struct ath_tx_status txs; |
| 2215 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
| 2216 | struct ath_hw *ah = sc->sc_ah; |
| 2217 | struct ath_txq *txq; |
| 2218 | struct ath_buf *bf, *lastbf; |
| 2219 | struct list_head bf_head; |
| 2220 | int status; |
| 2221 | int txok; |
| 2222 | |
| 2223 | for (;;) { |
| 2224 | status = ath9k_hw_txprocdesc(ah, NULL, (void *)&txs); |
| 2225 | if (status == -EINPROGRESS) |
| 2226 | break; |
| 2227 | if (status == -EIO) { |
| 2228 | ath_print(common, ATH_DBG_XMIT, |
| 2229 | "Error processing tx status\n"); |
| 2230 | break; |
| 2231 | } |
| 2232 | |
| 2233 | /* Skip beacon completions */ |
| 2234 | if (txs.qid == sc->beacon.beaconq) |
| 2235 | continue; |
| 2236 | |
| 2237 | txq = &sc->tx.txq[txs.qid]; |
| 2238 | |
| 2239 | spin_lock_bh(&txq->axq_lock); |
| 2240 | if (list_empty(&txq->txq_fifo[txq->txq_tailidx])) { |
| 2241 | spin_unlock_bh(&txq->axq_lock); |
| 2242 | return; |
| 2243 | } |
| 2244 | |
| 2245 | bf = list_first_entry(&txq->txq_fifo[txq->txq_tailidx], |
| 2246 | struct ath_buf, list); |
| 2247 | lastbf = bf->bf_lastbf; |
| 2248 | |
| 2249 | INIT_LIST_HEAD(&bf_head); |
| 2250 | list_cut_position(&bf_head, &txq->txq_fifo[txq->txq_tailidx], |
| 2251 | &lastbf->list); |
| 2252 | INCR(txq->txq_tailidx, ATH_TXFIFO_DEPTH); |
| 2253 | txq->axq_depth--; |
| 2254 | txq->axq_tx_inprogress = false; |
| 2255 | spin_unlock_bh(&txq->axq_lock); |
| 2256 | |
| 2257 | txok = !(txs.ts_status & ATH9K_TXERR_MASK); |
| 2258 | |
Vasanthakumar Thiagarajan | de0f648 | 2010-05-17 18:57:54 -0700 | [diff] [blame] | 2259 | /* |
| 2260 | * Make sure null func frame is acked before configuring |
| 2261 | * hw into ps mode. |
| 2262 | */ |
| 2263 | if (bf->bf_isnullfunc && txok) { |
| 2264 | if ((sc->ps_flags & PS_ENABLED)) |
| 2265 | ath9k_enable_ps(sc); |
| 2266 | else |
| 2267 | sc->ps_flags |= PS_NULLFUNC_COMPLETED; |
| 2268 | } |
| 2269 | |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2270 | if (!bf_isampdu(bf)) { |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2271 | if (txs.ts_status & ATH9K_TXERR_XRETRY) |
| 2272 | bf->bf_state.bf_type |= BUF_XRETRY; |
| 2273 | ath_tx_rc_status(bf, &txs, 0, txok, true); |
| 2274 | } |
| 2275 | |
| 2276 | if (bf_isampdu(bf)) |
| 2277 | ath_tx_complete_aggr(sc, txq, bf, &bf_head, &txs, txok); |
| 2278 | else |
| 2279 | ath_tx_complete_buf(sc, bf, txq, &bf_head, |
| 2280 | &txs, txok, 0); |
| 2281 | |
Felix Fietkau | 7f9f360 | 2010-04-26 15:04:36 -0400 | [diff] [blame] | 2282 | ath_wake_mac80211_queue(sc, txq); |
| 2283 | |
Vasanthakumar Thiagarajan | e500324 | 2010-04-15 17:39:36 -0400 | [diff] [blame] | 2284 | spin_lock_bh(&txq->axq_lock); |
| 2285 | if (!list_empty(&txq->txq_fifo_pending)) { |
| 2286 | INIT_LIST_HEAD(&bf_head); |
| 2287 | bf = list_first_entry(&txq->txq_fifo_pending, |
| 2288 | struct ath_buf, list); |
| 2289 | list_cut_position(&bf_head, &txq->txq_fifo_pending, |
| 2290 | &bf->bf_lastbf->list); |
| 2291 | ath_tx_txqaddbuf(sc, txq, &bf_head); |
| 2292 | } else if (sc->sc_flags & SC_OP_TXAGGR) |
| 2293 | ath_txq_schedule(sc, txq); |
| 2294 | spin_unlock_bh(&txq->axq_lock); |
| 2295 | } |
| 2296 | } |
| 2297 | |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2298 | /*****************/ |
| 2299 | /* Init, Cleanup */ |
| 2300 | /*****************/ |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2301 | |
Vasanthakumar Thiagarajan | 5088c2f | 2010-04-15 17:39:34 -0400 | [diff] [blame] | 2302 | static int ath_txstatus_setup(struct ath_softc *sc, int size) |
| 2303 | { |
| 2304 | struct ath_descdma *dd = &sc->txsdma; |
| 2305 | u8 txs_len = sc->sc_ah->caps.txs_len; |
| 2306 | |
| 2307 | dd->dd_desc_len = size * txs_len; |
| 2308 | dd->dd_desc = dma_alloc_coherent(sc->dev, dd->dd_desc_len, |
| 2309 | &dd->dd_desc_paddr, GFP_KERNEL); |
| 2310 | if (!dd->dd_desc) |
| 2311 | return -ENOMEM; |
| 2312 | |
| 2313 | return 0; |
| 2314 | } |
| 2315 | |
| 2316 | static int ath_tx_edma_init(struct ath_softc *sc) |
| 2317 | { |
| 2318 | int err; |
| 2319 | |
| 2320 | err = ath_txstatus_setup(sc, ATH_TXSTATUS_RING_SIZE); |
| 2321 | if (!err) |
| 2322 | ath9k_hw_setup_statusring(sc->sc_ah, sc->txsdma.dd_desc, |
| 2323 | sc->txsdma.dd_desc_paddr, |
| 2324 | ATH_TXSTATUS_RING_SIZE); |
| 2325 | |
| 2326 | return err; |
| 2327 | } |
| 2328 | |
| 2329 | static void ath_tx_edma_cleanup(struct ath_softc *sc) |
| 2330 | { |
| 2331 | struct ath_descdma *dd = &sc->txsdma; |
| 2332 | |
| 2333 | dma_free_coherent(sc->dev, dd->dd_desc_len, dd->dd_desc, |
| 2334 | dd->dd_desc_paddr); |
| 2335 | } |
| 2336 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2337 | int ath_tx_init(struct ath_softc *sc, int nbufs) |
| 2338 | { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 2339 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2340 | int error = 0; |
| 2341 | |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2342 | spin_lock_init(&sc->tx.txbuflock); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2343 | |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2344 | error = ath_descdma_setup(sc, &sc->tx.txdma, &sc->tx.txbuf, |
Vasanthakumar Thiagarajan | 4adfcde | 2010-04-15 17:39:33 -0400 | [diff] [blame] | 2345 | "tx", nbufs, 1, 1); |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2346 | if (error != 0) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 2347 | ath_print(common, ATH_DBG_FATAL, |
| 2348 | "Failed to allocate tx descriptors: %d\n", error); |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2349 | goto err; |
| 2350 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2351 | |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2352 | error = ath_descdma_setup(sc, &sc->beacon.bdma, &sc->beacon.bbuf, |
Vasanthakumar Thiagarajan | 5088c2f | 2010-04-15 17:39:34 -0400 | [diff] [blame] | 2353 | "beacon", ATH_BCBUF, 1, 1); |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2354 | if (error != 0) { |
Luis R. Rodriguez | c46917b | 2009-09-13 02:42:02 -0700 | [diff] [blame] | 2355 | ath_print(common, ATH_DBG_FATAL, |
| 2356 | "Failed to allocate beacon descriptors: %d\n", error); |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2357 | goto err; |
| 2358 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2359 | |
Senthil Balasubramanian | 164ace3 | 2009-07-14 20:17:09 -0400 | [diff] [blame] | 2360 | INIT_DELAYED_WORK(&sc->tx_complete_work, ath_tx_complete_poll_work); |
| 2361 | |
Vasanthakumar Thiagarajan | 5088c2f | 2010-04-15 17:39:34 -0400 | [diff] [blame] | 2362 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
| 2363 | error = ath_tx_edma_init(sc); |
| 2364 | if (error) |
| 2365 | goto err; |
| 2366 | } |
| 2367 | |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2368 | err: |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2369 | if (error != 0) |
| 2370 | ath_tx_cleanup(sc); |
| 2371 | |
| 2372 | return error; |
| 2373 | } |
| 2374 | |
Sujith | 797fe5cb | 2009-03-30 15:28:45 +0530 | [diff] [blame] | 2375 | void ath_tx_cleanup(struct ath_softc *sc) |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2376 | { |
Sujith | b77f483 | 2008-12-07 21:44:03 +0530 | [diff] [blame] | 2377 | if (sc->beacon.bdma.dd_desc_len != 0) |
| 2378 | ath_descdma_cleanup(sc, &sc->beacon.bdma, &sc->beacon.bbuf); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2379 | |
Sujith | b77f483 | 2008-12-07 21:44:03 +0530 | [diff] [blame] | 2380 | if (sc->tx.txdma.dd_desc_len != 0) |
| 2381 | ath_descdma_cleanup(sc, &sc->tx.txdma, &sc->tx.txbuf); |
Vasanthakumar Thiagarajan | 5088c2f | 2010-04-15 17:39:34 -0400 | [diff] [blame] | 2382 | |
| 2383 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) |
| 2384 | ath_tx_edma_cleanup(sc); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2385 | } |
| 2386 | |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2387 | void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an) |
| 2388 | { |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2389 | struct ath_atx_tid *tid; |
| 2390 | struct ath_atx_ac *ac; |
| 2391 | int tidno, acno; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2392 | |
Sujith | 8ee5afb | 2008-12-07 21:43:36 +0530 | [diff] [blame] | 2393 | for (tidno = 0, tid = &an->tid[tidno]; |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2394 | tidno < WME_NUM_TID; |
| 2395 | tidno++, tid++) { |
| 2396 | tid->an = an; |
| 2397 | tid->tidno = tidno; |
| 2398 | tid->seq_start = tid->seq_next = 0; |
| 2399 | tid->baw_size = WME_MAX_BA; |
| 2400 | tid->baw_head = tid->baw_tail = 0; |
| 2401 | tid->sched = false; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2402 | tid->paused = false; |
Sujith | a37c2c7 | 2008-10-29 10:15:40 +0530 | [diff] [blame] | 2403 | tid->state &= ~AGGR_CLEANUP; |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2404 | INIT_LIST_HEAD(&tid->buf_q); |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2405 | acno = TID_TO_WME_AC(tidno); |
Sujith | 8ee5afb | 2008-12-07 21:43:36 +0530 | [diff] [blame] | 2406 | tid->ac = &an->ac[acno]; |
Sujith | a37c2c7 | 2008-10-29 10:15:40 +0530 | [diff] [blame] | 2407 | tid->state &= ~AGGR_ADDBA_COMPLETE; |
| 2408 | tid->state &= ~AGGR_ADDBA_PROGRESS; |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2409 | } |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2410 | |
Sujith | 8ee5afb | 2008-12-07 21:43:36 +0530 | [diff] [blame] | 2411 | for (acno = 0, ac = &an->ac[acno]; |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2412 | acno < WME_NUM_AC; acno++, ac++) { |
| 2413 | ac->sched = false; |
Felix Fietkau | 1d2231e | 2010-06-12 00:33:51 -0400 | [diff] [blame] | 2414 | ac->qnum = sc->tx.hwq_map[acno]; |
Sujith | c517016 | 2008-10-29 10:13:59 +0530 | [diff] [blame] | 2415 | INIT_LIST_HEAD(&ac->tid_q); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2416 | } |
| 2417 | } |
| 2418 | |
Sujith | b5aa9bf | 2008-10-29 10:13:31 +0530 | [diff] [blame] | 2419 | 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] | 2420 | { |
Felix Fietkau | 2b40994 | 2010-07-07 19:42:08 +0200 | [diff] [blame] | 2421 | struct ath_atx_ac *ac; |
| 2422 | struct ath_atx_tid *tid; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2423 | struct ath_txq *txq; |
Felix Fietkau | 2b40994 | 2010-07-07 19:42:08 +0200 | [diff] [blame] | 2424 | int i, tidno; |
Sujith | e832435 | 2009-01-16 21:38:42 +0530 | [diff] [blame] | 2425 | |
Felix Fietkau | 2b40994 | 2010-07-07 19:42:08 +0200 | [diff] [blame] | 2426 | for (tidno = 0, tid = &an->tid[tidno]; |
| 2427 | tidno < WME_NUM_TID; tidno++, tid++) { |
| 2428 | i = tid->ac->qnum; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2429 | |
Felix Fietkau | 2b40994 | 2010-07-07 19:42:08 +0200 | [diff] [blame] | 2430 | if (!ATH_TXQ_SETUP(sc, i)) |
| 2431 | continue; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2432 | |
Felix Fietkau | 2b40994 | 2010-07-07 19:42:08 +0200 | [diff] [blame] | 2433 | txq = &sc->tx.txq[i]; |
| 2434 | ac = tid->ac; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2435 | |
Felix Fietkau | 2b40994 | 2010-07-07 19:42:08 +0200 | [diff] [blame] | 2436 | spin_lock_bh(&txq->axq_lock); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2437 | |
Felix Fietkau | 2b40994 | 2010-07-07 19:42:08 +0200 | [diff] [blame] | 2438 | if (tid->sched) { |
| 2439 | list_del(&tid->list); |
| 2440 | tid->sched = false; |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2441 | } |
Felix Fietkau | 2b40994 | 2010-07-07 19:42:08 +0200 | [diff] [blame] | 2442 | |
| 2443 | if (ac->sched) { |
| 2444 | list_del(&ac->list); |
| 2445 | tid->ac->sched = false; |
| 2446 | } |
| 2447 | |
| 2448 | ath_tid_drain(sc, txq, tid); |
| 2449 | tid->state &= ~AGGR_ADDBA_COMPLETE; |
| 2450 | tid->state &= ~AGGR_CLEANUP; |
| 2451 | |
| 2452 | spin_unlock_bh(&txq->axq_lock); |
Luis R. Rodriguez | f078f20 | 2008-08-04 00:16:41 -0700 | [diff] [blame] | 2453 | } |
| 2454 | } |