Commit | Line | Data |
---|---|---|
f078f209 | 1 | /* |
cee075a2 | 2 | * Copyright (c) 2008-2009 Atheros Communications Inc. |
f078f209 LR |
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 | ||
394cf0a1 | 17 | #include "ath9k.h" |
b622a720 | 18 | #include "ar9003_mac.h" |
f078f209 LR |
19 | |
20 | #define BITS_PER_BYTE 8 | |
21 | #define OFDM_PLCP_BITS 22 | |
7817e4ce | 22 | #define HT_RC_2_MCS(_rc) ((_rc) & 0x1f) |
f078f209 LR |
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 | ||
c6663876 | 37 | static u16 bits_per_symbol[][2] = { |
f078f209 LR |
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 */ | |
f078f209 LR |
47 | }; |
48 | ||
49 | #define IS_HT_RATE(_rate) ((_rate) & 0x80) | |
50 | ||
c37452b0 S |
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); | |
e8324357 | 54 | static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, |
db1a052b FF |
55 | struct ath_txq *txq, struct list_head *bf_q, |
56 | struct ath_tx_status *ts, int txok, int sendbar); | |
102e0572 | 57 | static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, |
e8324357 S |
58 | struct list_head *head); |
59 | static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf); | |
0934af23 | 60 | static int ath_tx_num_badfrms(struct ath_softc *sc, struct ath_buf *bf, |
db1a052b FF |
61 | struct ath_tx_status *ts, int txok); |
62 | static void ath_tx_rc_status(struct ath_buf *bf, struct ath_tx_status *ts, | |
8a92e2ee | 63 | int nbad, int txok, bool update_rc); |
c4288390 | 64 | |
545750d3 | 65 | enum { |
0e668cde FF |
66 | MCS_HT20, |
67 | MCS_HT20_SGI, | |
545750d3 FF |
68 | MCS_HT40, |
69 | MCS_HT40_SGI, | |
70 | }; | |
71 | ||
0e668cde FF |
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, | |
545750d3 FF |
84 | }, |
85 | [MCS_HT40] = { | |
0e668cde FF |
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, | |
545750d3 FF |
90 | }, |
91 | [MCS_HT40_SGI] = { | |
0e668cde FF |
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, | |
545750d3 FF |
96 | } |
97 | }; | |
98 | ||
e8324357 S |
99 | /*********************/ |
100 | /* Aggregation logic */ | |
101 | /*********************/ | |
f078f209 | 102 | |
e8324357 | 103 | static void ath_tx_queue_tid(struct ath_txq *txq, struct ath_atx_tid *tid) |
ff37e337 | 104 | { |
e8324357 | 105 | struct ath_atx_ac *ac = tid->ac; |
ff37e337 | 106 | |
e8324357 S |
107 | if (tid->paused) |
108 | return; | |
ff37e337 | 109 | |
e8324357 S |
110 | if (tid->sched) |
111 | return; | |
ff37e337 | 112 | |
e8324357 S |
113 | tid->sched = true; |
114 | list_add_tail(&tid->list, &ac->tid_q); | |
528f0c6b | 115 | |
e8324357 S |
116 | if (ac->sched) |
117 | return; | |
f078f209 | 118 | |
e8324357 S |
119 | ac->sched = true; |
120 | list_add_tail(&ac->list, &txq->axq_acq); | |
121 | } | |
f078f209 | 122 | |
e8324357 S |
123 | static void ath_tx_pause_tid(struct ath_softc *sc, struct ath_atx_tid *tid) |
124 | { | |
125 | struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum]; | |
f078f209 | 126 | |
e8324357 S |
127 | spin_lock_bh(&txq->axq_lock); |
128 | tid->paused++; | |
129 | spin_unlock_bh(&txq->axq_lock); | |
f078f209 LR |
130 | } |
131 | ||
e8324357 | 132 | static void ath_tx_resume_tid(struct ath_softc *sc, struct ath_atx_tid *tid) |
f078f209 | 133 | { |
e8324357 | 134 | struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum]; |
e6a9854b | 135 | |
9680e8a3 | 136 | BUG_ON(tid->paused <= 0); |
e8324357 | 137 | spin_lock_bh(&txq->axq_lock); |
f078f209 | 138 | |
e8324357 | 139 | tid->paused--; |
f078f209 | 140 | |
e8324357 S |
141 | if (tid->paused > 0) |
142 | goto unlock; | |
f078f209 | 143 | |
e8324357 S |
144 | if (list_empty(&tid->buf_q)) |
145 | goto unlock; | |
f078f209 | 146 | |
e8324357 S |
147 | ath_tx_queue_tid(txq, tid); |
148 | ath_txq_schedule(sc, txq); | |
149 | unlock: | |
150 | spin_unlock_bh(&txq->axq_lock); | |
528f0c6b | 151 | } |
f078f209 | 152 | |
e8324357 | 153 | static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid) |
528f0c6b | 154 | { |
e8324357 S |
155 | struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum]; |
156 | struct ath_buf *bf; | |
157 | struct list_head bf_head; | |
158 | INIT_LIST_HEAD(&bf_head); | |
f078f209 | 159 | |
9680e8a3 | 160 | BUG_ON(tid->paused <= 0); |
e8324357 | 161 | spin_lock_bh(&txq->axq_lock); |
e6a9854b | 162 | |
e8324357 | 163 | tid->paused--; |
f078f209 | 164 | |
e8324357 S |
165 | if (tid->paused > 0) { |
166 | spin_unlock_bh(&txq->axq_lock); | |
167 | return; | |
168 | } | |
f078f209 | 169 | |
e8324357 S |
170 | while (!list_empty(&tid->buf_q)) { |
171 | bf = list_first_entry(&tid->buf_q, struct ath_buf, list); | |
9680e8a3 | 172 | BUG_ON(bf_isretried(bf)); |
d43f3015 | 173 | list_move_tail(&bf->list, &bf_head); |
c37452b0 | 174 | ath_tx_send_ht_normal(sc, txq, tid, &bf_head); |
528f0c6b | 175 | } |
f078f209 | 176 | |
e8324357 | 177 | spin_unlock_bh(&txq->axq_lock); |
528f0c6b | 178 | } |
f078f209 | 179 | |
e8324357 S |
180 | static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid, |
181 | int seqno) | |
528f0c6b | 182 | { |
e8324357 | 183 | int index, cindex; |
f078f209 | 184 | |
e8324357 S |
185 | index = ATH_BA_INDEX(tid->seq_start, seqno); |
186 | cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); | |
f078f209 | 187 | |
e8324357 | 188 | tid->tx_buf[cindex] = NULL; |
528f0c6b | 189 | |
e8324357 S |
190 | while (tid->baw_head != tid->baw_tail && !tid->tx_buf[tid->baw_head]) { |
191 | INCR(tid->seq_start, IEEE80211_SEQ_MAX); | |
192 | INCR(tid->baw_head, ATH_TID_MAX_BUFS); | |
193 | } | |
528f0c6b | 194 | } |
f078f209 | 195 | |
e8324357 S |
196 | static void ath_tx_addto_baw(struct ath_softc *sc, struct ath_atx_tid *tid, |
197 | struct ath_buf *bf) | |
528f0c6b | 198 | { |
e8324357 | 199 | int index, cindex; |
528f0c6b | 200 | |
e8324357 S |
201 | if (bf_isretried(bf)) |
202 | return; | |
528f0c6b | 203 | |
e8324357 S |
204 | index = ATH_BA_INDEX(tid->seq_start, bf->bf_seqno); |
205 | cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); | |
f078f209 | 206 | |
9680e8a3 | 207 | BUG_ON(tid->tx_buf[cindex] != NULL); |
e8324357 | 208 | tid->tx_buf[cindex] = bf; |
f078f209 | 209 | |
e8324357 S |
210 | if (index >= ((tid->baw_tail - tid->baw_head) & |
211 | (ATH_TID_MAX_BUFS - 1))) { | |
212 | tid->baw_tail = cindex; | |
213 | INCR(tid->baw_tail, ATH_TID_MAX_BUFS); | |
f078f209 | 214 | } |
f078f209 LR |
215 | } |
216 | ||
217 | /* | |
e8324357 S |
218 | * TODO: For frame(s) that are in the retry state, we will reuse the |
219 | * sequence number(s) without setting the retry bit. The | |
220 | * alternative is to give up on these and BAR the receiver's window | |
221 | * forward. | |
f078f209 | 222 | */ |
e8324357 S |
223 | static void ath_tid_drain(struct ath_softc *sc, struct ath_txq *txq, |
224 | struct ath_atx_tid *tid) | |
f078f209 | 225 | |
f078f209 | 226 | { |
e8324357 S |
227 | struct ath_buf *bf; |
228 | struct list_head bf_head; | |
db1a052b FF |
229 | struct ath_tx_status ts; |
230 | ||
231 | memset(&ts, 0, sizeof(ts)); | |
e8324357 | 232 | INIT_LIST_HEAD(&bf_head); |
f078f209 | 233 | |
e8324357 S |
234 | for (;;) { |
235 | if (list_empty(&tid->buf_q)) | |
236 | break; | |
f078f209 | 237 | |
d43f3015 S |
238 | bf = list_first_entry(&tid->buf_q, struct ath_buf, list); |
239 | list_move_tail(&bf->list, &bf_head); | |
f078f209 | 240 | |
e8324357 S |
241 | if (bf_isretried(bf)) |
242 | ath_tx_update_baw(sc, tid, bf->bf_seqno); | |
f078f209 | 243 | |
e8324357 | 244 | spin_unlock(&txq->axq_lock); |
db1a052b | 245 | ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 0); |
e8324357 S |
246 | spin_lock(&txq->axq_lock); |
247 | } | |
f078f209 | 248 | |
e8324357 S |
249 | tid->seq_next = tid->seq_start; |
250 | tid->baw_tail = tid->baw_head; | |
f078f209 LR |
251 | } |
252 | ||
fec247c0 S |
253 | static void ath_tx_set_retry(struct ath_softc *sc, struct ath_txq *txq, |
254 | struct ath_buf *bf) | |
f078f209 | 255 | { |
e8324357 S |
256 | struct sk_buff *skb; |
257 | struct ieee80211_hdr *hdr; | |
f078f209 | 258 | |
e8324357 S |
259 | bf->bf_state.bf_type |= BUF_RETRY; |
260 | bf->bf_retries++; | |
fec247c0 | 261 | TX_STAT_INC(txq->axq_qnum, a_retries); |
f078f209 | 262 | |
e8324357 S |
263 | skb = bf->bf_mpdu; |
264 | hdr = (struct ieee80211_hdr *)skb->data; | |
265 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_RETRY); | |
f078f209 LR |
266 | } |
267 | ||
0a8cea84 | 268 | static struct ath_buf *ath_tx_get_buffer(struct ath_softc *sc) |
d43f3015 | 269 | { |
0a8cea84 | 270 | struct ath_buf *bf = NULL; |
d43f3015 S |
271 | |
272 | spin_lock_bh(&sc->tx.txbuflock); | |
0a8cea84 FF |
273 | |
274 | if (unlikely(list_empty(&sc->tx.txbuf))) { | |
8a46097a VT |
275 | spin_unlock_bh(&sc->tx.txbuflock); |
276 | return NULL; | |
277 | } | |
0a8cea84 FF |
278 | |
279 | bf = list_first_entry(&sc->tx.txbuf, struct ath_buf, list); | |
280 | list_del(&bf->list); | |
281 | ||
d43f3015 S |
282 | spin_unlock_bh(&sc->tx.txbuflock); |
283 | ||
0a8cea84 FF |
284 | return bf; |
285 | } | |
286 | ||
287 | static void ath_tx_return_buffer(struct ath_softc *sc, struct ath_buf *bf) | |
288 | { | |
289 | spin_lock_bh(&sc->tx.txbuflock); | |
290 | list_add_tail(&bf->list, &sc->tx.txbuf); | |
291 | spin_unlock_bh(&sc->tx.txbuflock); | |
292 | } | |
293 | ||
294 | static struct ath_buf* ath_clone_txbuf(struct ath_softc *sc, struct ath_buf *bf) | |
295 | { | |
296 | struct ath_buf *tbf; | |
297 | ||
298 | tbf = ath_tx_get_buffer(sc); | |
299 | if (WARN_ON(!tbf)) | |
300 | return NULL; | |
301 | ||
d43f3015 S |
302 | ATH_TXBUF_RESET(tbf); |
303 | ||
827e69bf | 304 | tbf->aphy = bf->aphy; |
d43f3015 S |
305 | tbf->bf_mpdu = bf->bf_mpdu; |
306 | tbf->bf_buf_addr = bf->bf_buf_addr; | |
d826c832 | 307 | memcpy(tbf->bf_desc, bf->bf_desc, sc->sc_ah->caps.tx_desc_len); |
d43f3015 S |
308 | tbf->bf_state = bf->bf_state; |
309 | tbf->bf_dmacontext = bf->bf_dmacontext; | |
310 | ||
311 | return tbf; | |
312 | } | |
313 | ||
314 | static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq, | |
315 | struct ath_buf *bf, struct list_head *bf_q, | |
db1a052b | 316 | struct ath_tx_status *ts, int txok) |
f078f209 | 317 | { |
e8324357 S |
318 | struct ath_node *an = NULL; |
319 | struct sk_buff *skb; | |
1286ec6d | 320 | struct ieee80211_sta *sta; |
76d5a9e8 | 321 | struct ieee80211_hw *hw; |
1286ec6d | 322 | struct ieee80211_hdr *hdr; |
76d5a9e8 | 323 | struct ieee80211_tx_info *tx_info; |
e8324357 | 324 | struct ath_atx_tid *tid = NULL; |
d43f3015 | 325 | struct ath_buf *bf_next, *bf_last = bf->bf_lastbf; |
e8324357 | 326 | struct list_head bf_head, bf_pending; |
0934af23 | 327 | u16 seq_st = 0, acked_cnt = 0, txfail_cnt = 0; |
f078f209 | 328 | u32 ba[WME_BA_BMP_SIZE >> 5]; |
0934af23 VT |
329 | int isaggr, txfail, txpending, sendbar = 0, needreset = 0, nbad = 0; |
330 | bool rc_update = true; | |
f078f209 | 331 | |
a22be22a | 332 | skb = bf->bf_mpdu; |
1286ec6d S |
333 | hdr = (struct ieee80211_hdr *)skb->data; |
334 | ||
76d5a9e8 | 335 | tx_info = IEEE80211_SKB_CB(skb); |
827e69bf | 336 | hw = bf->aphy->hw; |
76d5a9e8 | 337 | |
1286ec6d | 338 | rcu_read_lock(); |
f078f209 | 339 | |
5ed176e1 | 340 | /* XXX: use ieee80211_find_sta! */ |
76d5a9e8 | 341 | sta = ieee80211_find_sta_by_hw(hw, hdr->addr1); |
1286ec6d S |
342 | if (!sta) { |
343 | rcu_read_unlock(); | |
344 | return; | |
f078f209 LR |
345 | } |
346 | ||
1286ec6d S |
347 | an = (struct ath_node *)sta->drv_priv; |
348 | tid = ATH_AN_2_TID(an, bf->bf_tidno); | |
349 | ||
e8324357 | 350 | isaggr = bf_isaggr(bf); |
d43f3015 | 351 | memset(ba, 0, WME_BA_BMP_SIZE >> 3); |
f078f209 | 352 | |
d43f3015 | 353 | if (isaggr && txok) { |
db1a052b FF |
354 | if (ts->ts_flags & ATH9K_TX_BA) { |
355 | seq_st = ts->ts_seqnum; | |
356 | memcpy(ba, &ts->ba_low, WME_BA_BMP_SIZE >> 3); | |
e8324357 | 357 | } else { |
d43f3015 S |
358 | /* |
359 | * AR5416 can become deaf/mute when BA | |
360 | * issue happens. Chip needs to be reset. | |
361 | * But AP code may have sychronization issues | |
362 | * when perform internal reset in this routine. | |
363 | * Only enable reset in STA mode for now. | |
364 | */ | |
2660b81a | 365 | if (sc->sc_ah->opmode == NL80211_IFTYPE_STATION) |
d43f3015 | 366 | needreset = 1; |
e8324357 | 367 | } |
f078f209 LR |
368 | } |
369 | ||
e8324357 S |
370 | INIT_LIST_HEAD(&bf_pending); |
371 | INIT_LIST_HEAD(&bf_head); | |
f078f209 | 372 | |
db1a052b | 373 | nbad = ath_tx_num_badfrms(sc, bf, ts, txok); |
e8324357 S |
374 | while (bf) { |
375 | txfail = txpending = 0; | |
376 | bf_next = bf->bf_next; | |
f078f209 | 377 | |
e8324357 S |
378 | if (ATH_BA_ISSET(ba, ATH_BA_INDEX(seq_st, bf->bf_seqno))) { |
379 | /* transmit completion, subframe is | |
380 | * acked by block ack */ | |
0934af23 | 381 | acked_cnt++; |
e8324357 S |
382 | } else if (!isaggr && txok) { |
383 | /* transmit completion */ | |
0934af23 | 384 | acked_cnt++; |
e8324357 | 385 | } else { |
e8324357 | 386 | if (!(tid->state & AGGR_CLEANUP) && |
6d913f7d | 387 | !bf_last->bf_tx_aborted) { |
e8324357 | 388 | if (bf->bf_retries < ATH_MAX_SW_RETRIES) { |
fec247c0 | 389 | ath_tx_set_retry(sc, txq, bf); |
e8324357 S |
390 | txpending = 1; |
391 | } else { | |
392 | bf->bf_state.bf_type |= BUF_XRETRY; | |
393 | txfail = 1; | |
394 | sendbar = 1; | |
0934af23 | 395 | txfail_cnt++; |
e8324357 S |
396 | } |
397 | } else { | |
398 | /* | |
399 | * cleanup in progress, just fail | |
400 | * the un-acked sub-frames | |
401 | */ | |
402 | txfail = 1; | |
403 | } | |
404 | } | |
f078f209 | 405 | |
e5003249 VT |
406 | if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) && |
407 | bf_next == NULL) { | |
cbfe89c6 VT |
408 | /* |
409 | * Make sure the last desc is reclaimed if it | |
410 | * not a holding desc. | |
411 | */ | |
412 | if (!bf_last->bf_stale) | |
413 | list_move_tail(&bf->list, &bf_head); | |
414 | else | |
415 | INIT_LIST_HEAD(&bf_head); | |
e8324357 | 416 | } else { |
9680e8a3 | 417 | BUG_ON(list_empty(bf_q)); |
d43f3015 | 418 | list_move_tail(&bf->list, &bf_head); |
e8324357 | 419 | } |
f078f209 | 420 | |
e8324357 S |
421 | if (!txpending) { |
422 | /* | |
423 | * complete the acked-ones/xretried ones; update | |
424 | * block-ack window | |
425 | */ | |
426 | spin_lock_bh(&txq->axq_lock); | |
427 | ath_tx_update_baw(sc, tid, bf->bf_seqno); | |
428 | spin_unlock_bh(&txq->axq_lock); | |
f078f209 | 429 | |
8a92e2ee | 430 | if (rc_update && (acked_cnt == 1 || txfail_cnt == 1)) { |
db1a052b | 431 | ath_tx_rc_status(bf, ts, nbad, txok, true); |
8a92e2ee VT |
432 | rc_update = false; |
433 | } else { | |
db1a052b | 434 | ath_tx_rc_status(bf, ts, nbad, txok, false); |
8a92e2ee VT |
435 | } |
436 | ||
db1a052b FF |
437 | ath_tx_complete_buf(sc, bf, txq, &bf_head, ts, |
438 | !txfail, sendbar); | |
e8324357 | 439 | } else { |
d43f3015 | 440 | /* retry the un-acked ones */ |
e5003249 VT |
441 | if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)) { |
442 | if (bf->bf_next == NULL && bf_last->bf_stale) { | |
443 | struct ath_buf *tbf; | |
444 | ||
445 | tbf = ath_clone_txbuf(sc, bf_last); | |
446 | /* | |
447 | * Update tx baw and complete the | |
448 | * frame with failed status if we | |
449 | * run out of tx buf. | |
450 | */ | |
451 | if (!tbf) { | |
452 | spin_lock_bh(&txq->axq_lock); | |
453 | ath_tx_update_baw(sc, tid, | |
454 | bf->bf_seqno); | |
455 | spin_unlock_bh(&txq->axq_lock); | |
456 | ||
457 | bf->bf_state.bf_type |= | |
458 | BUF_XRETRY; | |
459 | ath_tx_rc_status(bf, ts, nbad, | |
460 | 0, false); | |
461 | ath_tx_complete_buf(sc, bf, txq, | |
462 | &bf_head, | |
463 | ts, 0, 0); | |
464 | break; | |
465 | } | |
466 | ||
467 | ath9k_hw_cleartxdesc(sc->sc_ah, | |
468 | tbf->bf_desc); | |
469 | list_add_tail(&tbf->list, &bf_head); | |
470 | } else { | |
471 | /* | |
472 | * Clear descriptor status words for | |
473 | * software retry | |
474 | */ | |
475 | ath9k_hw_cleartxdesc(sc->sc_ah, | |
476 | bf->bf_desc); | |
c41d92dc | 477 | } |
e8324357 S |
478 | } |
479 | ||
480 | /* | |
481 | * Put this buffer to the temporary pending | |
482 | * queue to retain ordering | |
483 | */ | |
484 | list_splice_tail_init(&bf_head, &bf_pending); | |
485 | } | |
486 | ||
487 | bf = bf_next; | |
f078f209 | 488 | } |
f078f209 | 489 | |
e8324357 | 490 | if (tid->state & AGGR_CLEANUP) { |
e8324357 S |
491 | if (tid->baw_head == tid->baw_tail) { |
492 | tid->state &= ~AGGR_ADDBA_COMPLETE; | |
e8324357 | 493 | tid->state &= ~AGGR_CLEANUP; |
e63835b0 | 494 | |
e8324357 S |
495 | /* send buffered frames as singles */ |
496 | ath_tx_flush_tid(sc, tid); | |
d43f3015 | 497 | } |
1286ec6d | 498 | rcu_read_unlock(); |
e8324357 S |
499 | return; |
500 | } | |
f078f209 | 501 | |
d43f3015 | 502 | /* prepend un-acked frames to the beginning of the pending frame queue */ |
e8324357 S |
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 | } | |
102e0572 | 509 | |
1286ec6d S |
510 | rcu_read_unlock(); |
511 | ||
e8324357 S |
512 | if (needreset) |
513 | ath_reset(sc, false); | |
e8324357 | 514 | } |
f078f209 | 515 | |
e8324357 S |
516 | static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf, |
517 | struct ath_atx_tid *tid) | |
f078f209 | 518 | { |
528f0c6b S |
519 | struct sk_buff *skb; |
520 | struct ieee80211_tx_info *tx_info; | |
a8efee4f | 521 | struct ieee80211_tx_rate *rates; |
d43f3015 | 522 | u32 max_4ms_framelen, frmlen; |
4ef70841 | 523 | u16 aggr_limit, legacy = 0; |
e8324357 | 524 | int i; |
528f0c6b | 525 | |
a22be22a | 526 | skb = bf->bf_mpdu; |
528f0c6b | 527 | tx_info = IEEE80211_SKB_CB(skb); |
e63835b0 | 528 | rates = tx_info->control.rates; |
528f0c6b | 529 | |
e8324357 S |
530 | /* |
531 | * Find the lowest frame length among the rate series that will have a | |
532 | * 4ms transmit duration. | |
533 | * TODO - TXOP limit needs to be considered. | |
534 | */ | |
535 | max_4ms_framelen = ATH_AMPDU_LIMIT_MAX; | |
e63835b0 | 536 | |
e8324357 S |
537 | for (i = 0; i < 4; i++) { |
538 | if (rates[i].count) { | |
545750d3 FF |
539 | int modeidx; |
540 | if (!(rates[i].flags & IEEE80211_TX_RC_MCS)) { | |
e8324357 S |
541 | legacy = 1; |
542 | break; | |
543 | } | |
544 | ||
0e668cde | 545 | if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) |
545750d3 FF |
546 | modeidx = MCS_HT40; |
547 | else | |
0e668cde FF |
548 | modeidx = MCS_HT20; |
549 | ||
550 | if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI) | |
551 | modeidx++; | |
545750d3 FF |
552 | |
553 | frmlen = ath_max_4ms_framelen[modeidx][rates[i].idx]; | |
d43f3015 | 554 | max_4ms_framelen = min(max_4ms_framelen, frmlen); |
f078f209 LR |
555 | } |
556 | } | |
e63835b0 | 557 | |
f078f209 | 558 | /* |
e8324357 S |
559 | * limit aggregate size by the minimum rate if rate selected is |
560 | * not a probe rate, if rate selected is a probe rate then | |
561 | * avoid aggregation of this packet. | |
f078f209 | 562 | */ |
e8324357 S |
563 | if (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE || legacy) |
564 | return 0; | |
f078f209 | 565 | |
1773912b VT |
566 | if (sc->sc_flags & SC_OP_BT_PRIORITY_DETECTED) |
567 | aggr_limit = min((max_4ms_framelen * 3) / 8, | |
568 | (u32)ATH_AMPDU_LIMIT_MAX); | |
569 | else | |
570 | aggr_limit = min(max_4ms_framelen, | |
571 | (u32)ATH_AMPDU_LIMIT_MAX); | |
f078f209 | 572 | |
e8324357 S |
573 | /* |
574 | * h/w can accept aggregates upto 16 bit lengths (65535). | |
575 | * The IE, however can hold upto 65536, which shows up here | |
576 | * as zero. Ignore 65536 since we are constrained by hw. | |
f078f209 | 577 | */ |
4ef70841 S |
578 | if (tid->an->maxampdu) |
579 | aggr_limit = min(aggr_limit, tid->an->maxampdu); | |
f078f209 | 580 | |
e8324357 S |
581 | return aggr_limit; |
582 | } | |
f078f209 | 583 | |
e8324357 | 584 | /* |
d43f3015 | 585 | * Returns the number of delimiters to be added to |
e8324357 | 586 | * meet the minimum required mpdudensity. |
e8324357 S |
587 | */ |
588 | static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid, | |
589 | struct ath_buf *bf, u16 frmlen) | |
590 | { | |
e8324357 S |
591 | struct sk_buff *skb = bf->bf_mpdu; |
592 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); | |
4ef70841 | 593 | u32 nsymbits, nsymbols; |
e8324357 | 594 | u16 minlen; |
545750d3 | 595 | u8 flags, rix; |
c6663876 | 596 | int width, streams, half_gi, ndelim, mindelim; |
e8324357 S |
597 | |
598 | /* Select standard number of delimiters based on frame length alone */ | |
599 | ndelim = ATH_AGGR_GET_NDELIM(frmlen); | |
f078f209 LR |
600 | |
601 | /* | |
e8324357 S |
602 | * If encryption enabled, hardware requires some more padding between |
603 | * subframes. | |
604 | * TODO - this could be improved to be dependent on the rate. | |
605 | * The hardware can keep up at lower rates, but not higher rates | |
f078f209 | 606 | */ |
e8324357 S |
607 | if (bf->bf_keytype != ATH9K_KEY_TYPE_CLEAR) |
608 | ndelim += ATH_AGGR_ENCRYPTDELIM; | |
f078f209 | 609 | |
e8324357 S |
610 | /* |
611 | * Convert desired mpdu density from microeconds to bytes based | |
612 | * on highest rate in rate series (i.e. first rate) to determine | |
613 | * required minimum length for subframe. Take into account | |
614 | * whether high rate is 20 or 40Mhz and half or full GI. | |
4ef70841 | 615 | * |
e8324357 S |
616 | * If there is no mpdu density restriction, no further calculation |
617 | * is needed. | |
618 | */ | |
4ef70841 S |
619 | |
620 | if (tid->an->mpdudensity == 0) | |
e8324357 | 621 | return ndelim; |
f078f209 | 622 | |
e8324357 S |
623 | rix = tx_info->control.rates[0].idx; |
624 | flags = tx_info->control.rates[0].flags; | |
e8324357 S |
625 | width = (flags & IEEE80211_TX_RC_40_MHZ_WIDTH) ? 1 : 0; |
626 | half_gi = (flags & IEEE80211_TX_RC_SHORT_GI) ? 1 : 0; | |
f078f209 | 627 | |
e8324357 | 628 | if (half_gi) |
4ef70841 | 629 | nsymbols = NUM_SYMBOLS_PER_USEC_HALFGI(tid->an->mpdudensity); |
e8324357 | 630 | else |
4ef70841 | 631 | nsymbols = NUM_SYMBOLS_PER_USEC(tid->an->mpdudensity); |
f078f209 | 632 | |
e8324357 S |
633 | if (nsymbols == 0) |
634 | nsymbols = 1; | |
f078f209 | 635 | |
c6663876 FF |
636 | streams = HT_RC_2_STREAMS(rix); |
637 | nsymbits = bits_per_symbol[rix % 8][width] * streams; | |
e8324357 | 638 | minlen = (nsymbols * nsymbits) / BITS_PER_BYTE; |
f078f209 | 639 | |
e8324357 | 640 | if (frmlen < minlen) { |
e8324357 S |
641 | mindelim = (minlen - frmlen) / ATH_AGGR_DELIM_SZ; |
642 | ndelim = max(mindelim, ndelim); | |
f078f209 LR |
643 | } |
644 | ||
e8324357 | 645 | return ndelim; |
f078f209 LR |
646 | } |
647 | ||
e8324357 | 648 | static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc, |
fec247c0 | 649 | struct ath_txq *txq, |
d43f3015 S |
650 | struct ath_atx_tid *tid, |
651 | struct list_head *bf_q) | |
f078f209 | 652 | { |
e8324357 | 653 | #define PADBYTES(_len) ((4 - ((_len) % 4)) % 4) |
d43f3015 S |
654 | struct ath_buf *bf, *bf_first, *bf_prev = NULL; |
655 | int rl = 0, nframes = 0, ndelim, prev_al = 0; | |
e8324357 S |
656 | u16 aggr_limit = 0, al = 0, bpad = 0, |
657 | al_delta, h_baw = tid->baw_size / 2; | |
658 | enum ATH_AGGR_STATUS status = ATH_AGGR_DONE; | |
f078f209 | 659 | |
e8324357 | 660 | bf_first = list_first_entry(&tid->buf_q, struct ath_buf, list); |
f078f209 | 661 | |
e8324357 S |
662 | do { |
663 | bf = list_first_entry(&tid->buf_q, struct ath_buf, list); | |
f078f209 | 664 | |
d43f3015 | 665 | /* do not step over block-ack window */ |
e8324357 S |
666 | if (!BAW_WITHIN(tid->seq_start, tid->baw_size, bf->bf_seqno)) { |
667 | status = ATH_AGGR_BAW_CLOSED; | |
668 | break; | |
669 | } | |
f078f209 | 670 | |
e8324357 S |
671 | if (!rl) { |
672 | aggr_limit = ath_lookup_rate(sc, bf, tid); | |
673 | rl = 1; | |
674 | } | |
f078f209 | 675 | |
d43f3015 | 676 | /* do not exceed aggregation limit */ |
e8324357 | 677 | al_delta = ATH_AGGR_DELIM_SZ + bf->bf_frmlen; |
f078f209 | 678 | |
d43f3015 S |
679 | if (nframes && |
680 | (aggr_limit < (al + bpad + al_delta + prev_al))) { | |
e8324357 S |
681 | status = ATH_AGGR_LIMITED; |
682 | break; | |
683 | } | |
f078f209 | 684 | |
d43f3015 S |
685 | /* do not exceed subframe limit */ |
686 | if (nframes >= min((int)h_baw, ATH_AMPDU_SUBFRAME_DEFAULT)) { | |
e8324357 S |
687 | status = ATH_AGGR_LIMITED; |
688 | break; | |
689 | } | |
d43f3015 | 690 | nframes++; |
f078f209 | 691 | |
d43f3015 | 692 | /* add padding for previous frame to aggregation length */ |
e8324357 | 693 | al += bpad + al_delta; |
f078f209 | 694 | |
e8324357 S |
695 | /* |
696 | * Get the delimiters needed to meet the MPDU | |
697 | * density for this node. | |
698 | */ | |
699 | ndelim = ath_compute_num_delims(sc, tid, bf_first, bf->bf_frmlen); | |
e8324357 | 700 | bpad = PADBYTES(al_delta) + (ndelim << 2); |
f078f209 | 701 | |
e8324357 | 702 | bf->bf_next = NULL; |
87d5efbb | 703 | ath9k_hw_set_desc_link(sc->sc_ah, bf->bf_desc, 0); |
f078f209 | 704 | |
d43f3015 | 705 | /* link buffers of this frame to the aggregate */ |
e8324357 | 706 | ath_tx_addto_baw(sc, tid, bf); |
d43f3015 S |
707 | ath9k_hw_set11n_aggr_middle(sc->sc_ah, bf->bf_desc, ndelim); |
708 | list_move_tail(&bf->list, bf_q); | |
e8324357 S |
709 | if (bf_prev) { |
710 | bf_prev->bf_next = bf; | |
87d5efbb VT |
711 | ath9k_hw_set_desc_link(sc->sc_ah, bf_prev->bf_desc, |
712 | bf->bf_daddr); | |
e8324357 S |
713 | } |
714 | bf_prev = bf; | |
fec247c0 | 715 | |
e8324357 | 716 | } while (!list_empty(&tid->buf_q)); |
f078f209 | 717 | |
e8324357 S |
718 | bf_first->bf_al = al; |
719 | bf_first->bf_nframes = nframes; | |
d43f3015 | 720 | |
e8324357 S |
721 | return status; |
722 | #undef PADBYTES | |
723 | } | |
f078f209 | 724 | |
e8324357 S |
725 | static void ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq, |
726 | struct ath_atx_tid *tid) | |
727 | { | |
d43f3015 | 728 | struct ath_buf *bf; |
e8324357 S |
729 | enum ATH_AGGR_STATUS status; |
730 | struct list_head bf_q; | |
f078f209 | 731 | |
e8324357 S |
732 | do { |
733 | if (list_empty(&tid->buf_q)) | |
734 | return; | |
f078f209 | 735 | |
e8324357 S |
736 | INIT_LIST_HEAD(&bf_q); |
737 | ||
fec247c0 | 738 | status = ath_tx_form_aggr(sc, txq, tid, &bf_q); |
f078f209 | 739 | |
f078f209 | 740 | /* |
d43f3015 S |
741 | * no frames picked up to be aggregated; |
742 | * block-ack window is not open. | |
f078f209 | 743 | */ |
e8324357 S |
744 | if (list_empty(&bf_q)) |
745 | break; | |
f078f209 | 746 | |
e8324357 | 747 | bf = list_first_entry(&bf_q, struct ath_buf, list); |
d43f3015 | 748 | bf->bf_lastbf = list_entry(bf_q.prev, struct ath_buf, list); |
f078f209 | 749 | |
d43f3015 | 750 | /* if only one frame, send as non-aggregate */ |
e8324357 | 751 | if (bf->bf_nframes == 1) { |
e8324357 | 752 | bf->bf_state.bf_type &= ~BUF_AGGR; |
d43f3015 | 753 | ath9k_hw_clr11n_aggr(sc->sc_ah, bf->bf_desc); |
e8324357 S |
754 | ath_buf_set_rate(sc, bf); |
755 | ath_tx_txqaddbuf(sc, txq, &bf_q); | |
756 | continue; | |
757 | } | |
f078f209 | 758 | |
d43f3015 | 759 | /* setup first desc of aggregate */ |
e8324357 S |
760 | bf->bf_state.bf_type |= BUF_AGGR; |
761 | ath_buf_set_rate(sc, bf); | |
762 | ath9k_hw_set11n_aggr_first(sc->sc_ah, bf->bf_desc, bf->bf_al); | |
f078f209 | 763 | |
d43f3015 S |
764 | /* anchor last desc of aggregate */ |
765 | ath9k_hw_set11n_aggr_last(sc->sc_ah, bf->bf_lastbf->bf_desc); | |
f078f209 | 766 | |
e8324357 | 767 | ath_tx_txqaddbuf(sc, txq, &bf_q); |
fec247c0 | 768 | TX_STAT_INC(txq->axq_qnum, a_aggr); |
f078f209 | 769 | |
e8324357 S |
770 | } while (txq->axq_depth < ATH_AGGR_MIN_QDEPTH && |
771 | status != ATH_AGGR_BAW_CLOSED); | |
772 | } | |
773 | ||
f83da965 S |
774 | void ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta, |
775 | u16 tid, u16 *ssn) | |
e8324357 S |
776 | { |
777 | struct ath_atx_tid *txtid; | |
778 | struct ath_node *an; | |
779 | ||
780 | an = (struct ath_node *)sta->drv_priv; | |
f83da965 S |
781 | txtid = ATH_AN_2_TID(an, tid); |
782 | txtid->state |= AGGR_ADDBA_PROGRESS; | |
783 | ath_tx_pause_tid(sc, txtid); | |
784 | *ssn = txtid->seq_start; | |
e8324357 | 785 | } |
f078f209 | 786 | |
f83da965 | 787 | void ath_tx_aggr_stop(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid) |
e8324357 S |
788 | { |
789 | struct ath_node *an = (struct ath_node *)sta->drv_priv; | |
790 | struct ath_atx_tid *txtid = ATH_AN_2_TID(an, tid); | |
791 | struct ath_txq *txq = &sc->tx.txq[txtid->ac->qnum]; | |
db1a052b | 792 | struct ath_tx_status ts; |
e8324357 S |
793 | struct ath_buf *bf; |
794 | struct list_head bf_head; | |
db1a052b FF |
795 | |
796 | memset(&ts, 0, sizeof(ts)); | |
e8324357 | 797 | INIT_LIST_HEAD(&bf_head); |
f078f209 | 798 | |
e8324357 | 799 | if (txtid->state & AGGR_CLEANUP) |
f83da965 | 800 | return; |
f078f209 | 801 | |
e8324357 | 802 | if (!(txtid->state & AGGR_ADDBA_COMPLETE)) { |
5eae6592 | 803 | txtid->state &= ~AGGR_ADDBA_PROGRESS; |
f83da965 | 804 | return; |
e8324357 | 805 | } |
f078f209 | 806 | |
e8324357 S |
807 | ath_tx_pause_tid(sc, txtid); |
808 | ||
809 | /* drop all software retried frames and mark this TID */ | |
810 | spin_lock_bh(&txq->axq_lock); | |
811 | while (!list_empty(&txtid->buf_q)) { | |
812 | bf = list_first_entry(&txtid->buf_q, struct ath_buf, list); | |
813 | if (!bf_isretried(bf)) { | |
814 | /* | |
815 | * NB: it's based on the assumption that | |
816 | * software retried frame will always stay | |
817 | * at the head of software queue. | |
818 | */ | |
819 | break; | |
820 | } | |
d43f3015 | 821 | list_move_tail(&bf->list, &bf_head); |
e8324357 | 822 | ath_tx_update_baw(sc, txtid, bf->bf_seqno); |
db1a052b | 823 | ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 0); |
f078f209 | 824 | } |
d43f3015 | 825 | spin_unlock_bh(&txq->axq_lock); |
f078f209 | 826 | |
e8324357 | 827 | if (txtid->baw_head != txtid->baw_tail) { |
e8324357 S |
828 | txtid->state |= AGGR_CLEANUP; |
829 | } else { | |
830 | txtid->state &= ~AGGR_ADDBA_COMPLETE; | |
e8324357 | 831 | ath_tx_flush_tid(sc, txtid); |
f078f209 | 832 | } |
e8324357 | 833 | } |
f078f209 | 834 | |
e8324357 S |
835 | void ath_tx_aggr_resume(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid) |
836 | { | |
837 | struct ath_atx_tid *txtid; | |
838 | struct ath_node *an; | |
839 | ||
840 | an = (struct ath_node *)sta->drv_priv; | |
841 | ||
842 | if (sc->sc_flags & SC_OP_TXAGGR) { | |
843 | txtid = ATH_AN_2_TID(an, tid); | |
844 | txtid->baw_size = | |
845 | IEEE80211_MIN_AMPDU_BUF << sta->ht_cap.ampdu_factor; | |
846 | txtid->state |= AGGR_ADDBA_COMPLETE; | |
847 | txtid->state &= ~AGGR_ADDBA_PROGRESS; | |
848 | ath_tx_resume_tid(sc, txtid); | |
849 | } | |
f078f209 LR |
850 | } |
851 | ||
e8324357 | 852 | bool ath_tx_aggr_check(struct ath_softc *sc, struct ath_node *an, u8 tidno) |
c4288390 | 853 | { |
e8324357 | 854 | struct ath_atx_tid *txtid; |
c4288390 | 855 | |
e8324357 S |
856 | if (!(sc->sc_flags & SC_OP_TXAGGR)) |
857 | return false; | |
c4288390 | 858 | |
e8324357 S |
859 | txtid = ATH_AN_2_TID(an, tidno); |
860 | ||
c3d8f02e | 861 | if (!(txtid->state & (AGGR_ADDBA_COMPLETE | AGGR_ADDBA_PROGRESS))) |
e8324357 | 862 | return true; |
e8324357 | 863 | return false; |
c4288390 S |
864 | } |
865 | ||
e8324357 S |
866 | /********************/ |
867 | /* Queue Management */ | |
868 | /********************/ | |
f078f209 | 869 | |
e8324357 S |
870 | static void ath_txq_drain_pending_buffers(struct ath_softc *sc, |
871 | struct ath_txq *txq) | |
f078f209 | 872 | { |
e8324357 S |
873 | struct ath_atx_ac *ac, *ac_tmp; |
874 | struct ath_atx_tid *tid, *tid_tmp; | |
f078f209 | 875 | |
e8324357 S |
876 | list_for_each_entry_safe(ac, ac_tmp, &txq->axq_acq, list) { |
877 | list_del(&ac->list); | |
878 | ac->sched = false; | |
879 | list_for_each_entry_safe(tid, tid_tmp, &ac->tid_q, list) { | |
880 | list_del(&tid->list); | |
881 | tid->sched = false; | |
882 | ath_tid_drain(sc, txq, tid); | |
883 | } | |
f078f209 LR |
884 | } |
885 | } | |
886 | ||
e8324357 | 887 | struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype) |
f078f209 | 888 | { |
cbe61d8a | 889 | struct ath_hw *ah = sc->sc_ah; |
c46917bb | 890 | struct ath_common *common = ath9k_hw_common(ah); |
e8324357 | 891 | struct ath9k_tx_queue_info qi; |
e5003249 | 892 | int qnum, i; |
f078f209 | 893 | |
e8324357 S |
894 | memset(&qi, 0, sizeof(qi)); |
895 | qi.tqi_subtype = subtype; | |
896 | qi.tqi_aifs = ATH9K_TXQ_USEDEFAULT; | |
897 | qi.tqi_cwmin = ATH9K_TXQ_USEDEFAULT; | |
898 | qi.tqi_cwmax = ATH9K_TXQ_USEDEFAULT; | |
899 | qi.tqi_physCompBuf = 0; | |
f078f209 LR |
900 | |
901 | /* | |
e8324357 S |
902 | * Enable interrupts only for EOL and DESC conditions. |
903 | * We mark tx descriptors to receive a DESC interrupt | |
904 | * when a tx queue gets deep; otherwise waiting for the | |
905 | * EOL to reap descriptors. Note that this is done to | |
906 | * reduce interrupt load and this only defers reaping | |
907 | * descriptors, never transmitting frames. Aside from | |
908 | * reducing interrupts this also permits more concurrency. | |
909 | * The only potential downside is if the tx queue backs | |
910 | * up in which case the top half of the kernel may backup | |
911 | * due to a lack of tx descriptors. | |
912 | * | |
913 | * The UAPSD queue is an exception, since we take a desc- | |
914 | * based intr on the EOSP frames. | |
f078f209 | 915 | */ |
afe754d6 VT |
916 | if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
917 | qi.tqi_qflags = TXQ_FLAG_TXOKINT_ENABLE | | |
918 | TXQ_FLAG_TXERRINT_ENABLE; | |
919 | } else { | |
920 | if (qtype == ATH9K_TX_QUEUE_UAPSD) | |
921 | qi.tqi_qflags = TXQ_FLAG_TXDESCINT_ENABLE; | |
922 | else | |
923 | qi.tqi_qflags = TXQ_FLAG_TXEOLINT_ENABLE | | |
924 | TXQ_FLAG_TXDESCINT_ENABLE; | |
925 | } | |
e8324357 S |
926 | qnum = ath9k_hw_setuptxqueue(ah, qtype, &qi); |
927 | if (qnum == -1) { | |
f078f209 | 928 | /* |
e8324357 S |
929 | * NB: don't print a message, this happens |
930 | * normally on parts with too few tx queues | |
f078f209 | 931 | */ |
e8324357 | 932 | return NULL; |
f078f209 | 933 | } |
e8324357 | 934 | if (qnum >= ARRAY_SIZE(sc->tx.txq)) { |
c46917bb LR |
935 | ath_print(common, ATH_DBG_FATAL, |
936 | "qnum %u out of range, max %u!\n", | |
937 | qnum, (unsigned int)ARRAY_SIZE(sc->tx.txq)); | |
e8324357 S |
938 | ath9k_hw_releasetxqueue(ah, qnum); |
939 | return NULL; | |
940 | } | |
941 | if (!ATH_TXQ_SETUP(sc, qnum)) { | |
942 | struct ath_txq *txq = &sc->tx.txq[qnum]; | |
f078f209 | 943 | |
e8324357 S |
944 | txq->axq_qnum = qnum; |
945 | txq->axq_link = NULL; | |
946 | INIT_LIST_HEAD(&txq->axq_q); | |
947 | INIT_LIST_HEAD(&txq->axq_acq); | |
948 | spin_lock_init(&txq->axq_lock); | |
949 | txq->axq_depth = 0; | |
164ace38 | 950 | txq->axq_tx_inprogress = false; |
e8324357 | 951 | sc->tx.txqsetup |= 1<<qnum; |
e5003249 VT |
952 | |
953 | txq->txq_headidx = txq->txq_tailidx = 0; | |
954 | for (i = 0; i < ATH_TXFIFO_DEPTH; i++) | |
955 | INIT_LIST_HEAD(&txq->txq_fifo[i]); | |
956 | INIT_LIST_HEAD(&txq->txq_fifo_pending); | |
e8324357 S |
957 | } |
958 | return &sc->tx.txq[qnum]; | |
f078f209 LR |
959 | } |
960 | ||
1773912b | 961 | int ath_tx_get_qnum(struct ath_softc *sc, int qtype, int haltype) |
f078f209 | 962 | { |
e8324357 | 963 | int qnum; |
f078f209 | 964 | |
e8324357 S |
965 | switch (qtype) { |
966 | case ATH9K_TX_QUEUE_DATA: | |
967 | if (haltype >= ARRAY_SIZE(sc->tx.hwq_map)) { | |
c46917bb LR |
968 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL, |
969 | "HAL AC %u out of range, max %zu!\n", | |
970 | haltype, ARRAY_SIZE(sc->tx.hwq_map)); | |
e8324357 S |
971 | return -1; |
972 | } | |
973 | qnum = sc->tx.hwq_map[haltype]; | |
974 | break; | |
975 | case ATH9K_TX_QUEUE_BEACON: | |
976 | qnum = sc->beacon.beaconq; | |
977 | break; | |
978 | case ATH9K_TX_QUEUE_CAB: | |
979 | qnum = sc->beacon.cabq->axq_qnum; | |
980 | break; | |
981 | default: | |
982 | qnum = -1; | |
983 | } | |
984 | return qnum; | |
985 | } | |
f078f209 | 986 | |
e8324357 S |
987 | struct ath_txq *ath_test_get_txq(struct ath_softc *sc, struct sk_buff *skb) |
988 | { | |
989 | struct ath_txq *txq = NULL; | |
f52de03b | 990 | u16 skb_queue = skb_get_queue_mapping(skb); |
e8324357 | 991 | int qnum; |
f078f209 | 992 | |
f52de03b | 993 | qnum = ath_get_hal_qnum(skb_queue, sc); |
e8324357 | 994 | txq = &sc->tx.txq[qnum]; |
f078f209 | 995 | |
e8324357 S |
996 | spin_lock_bh(&txq->axq_lock); |
997 | ||
998 | if (txq->axq_depth >= (ATH_TXBUF - 20)) { | |
c46917bb LR |
999 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_XMIT, |
1000 | "TX queue: %d is full, depth: %d\n", | |
1001 | qnum, txq->axq_depth); | |
f52de03b | 1002 | ath_mac80211_stop_queue(sc, skb_queue); |
e8324357 S |
1003 | txq->stopped = 1; |
1004 | spin_unlock_bh(&txq->axq_lock); | |
1005 | return NULL; | |
f078f209 LR |
1006 | } |
1007 | ||
e8324357 S |
1008 | spin_unlock_bh(&txq->axq_lock); |
1009 | ||
1010 | return txq; | |
1011 | } | |
1012 | ||
1013 | int ath_txq_update(struct ath_softc *sc, int qnum, | |
1014 | struct ath9k_tx_queue_info *qinfo) | |
1015 | { | |
cbe61d8a | 1016 | struct ath_hw *ah = sc->sc_ah; |
e8324357 S |
1017 | int error = 0; |
1018 | struct ath9k_tx_queue_info qi; | |
1019 | ||
1020 | if (qnum == sc->beacon.beaconq) { | |
1021 | /* | |
1022 | * XXX: for beacon queue, we just save the parameter. | |
1023 | * It will be picked up by ath_beaconq_config when | |
1024 | * it's necessary. | |
1025 | */ | |
1026 | sc->beacon.beacon_qi = *qinfo; | |
f078f209 | 1027 | return 0; |
e8324357 | 1028 | } |
f078f209 | 1029 | |
9680e8a3 | 1030 | BUG_ON(sc->tx.txq[qnum].axq_qnum != qnum); |
e8324357 S |
1031 | |
1032 | ath9k_hw_get_txq_props(ah, qnum, &qi); | |
1033 | qi.tqi_aifs = qinfo->tqi_aifs; | |
1034 | qi.tqi_cwmin = qinfo->tqi_cwmin; | |
1035 | qi.tqi_cwmax = qinfo->tqi_cwmax; | |
1036 | qi.tqi_burstTime = qinfo->tqi_burstTime; | |
1037 | qi.tqi_readyTime = qinfo->tqi_readyTime; | |
1038 | ||
1039 | if (!ath9k_hw_set_txq_props(ah, qnum, &qi)) { | |
c46917bb LR |
1040 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL, |
1041 | "Unable to update hardware queue %u!\n", qnum); | |
e8324357 S |
1042 | error = -EIO; |
1043 | } else { | |
1044 | ath9k_hw_resettxqueue(ah, qnum); | |
1045 | } | |
1046 | ||
1047 | return error; | |
1048 | } | |
1049 | ||
1050 | int ath_cabq_update(struct ath_softc *sc) | |
1051 | { | |
1052 | struct ath9k_tx_queue_info qi; | |
1053 | int qnum = sc->beacon.cabq->axq_qnum; | |
f078f209 | 1054 | |
e8324357 | 1055 | ath9k_hw_get_txq_props(sc->sc_ah, qnum, &qi); |
f078f209 | 1056 | /* |
e8324357 | 1057 | * Ensure the readytime % is within the bounds. |
f078f209 | 1058 | */ |
17d7904d S |
1059 | if (sc->config.cabqReadytime < ATH9K_READY_TIME_LO_BOUND) |
1060 | sc->config.cabqReadytime = ATH9K_READY_TIME_LO_BOUND; | |
1061 | else if (sc->config.cabqReadytime > ATH9K_READY_TIME_HI_BOUND) | |
1062 | sc->config.cabqReadytime = ATH9K_READY_TIME_HI_BOUND; | |
f078f209 | 1063 | |
57c4d7b4 | 1064 | qi.tqi_readyTime = (sc->beacon_interval * |
fdbf7335 | 1065 | sc->config.cabqReadytime) / 100; |
e8324357 S |
1066 | ath_txq_update(sc, qnum, &qi); |
1067 | ||
1068 | return 0; | |
f078f209 LR |
1069 | } |
1070 | ||
043a0405 S |
1071 | /* |
1072 | * Drain a given TX queue (could be Beacon or Data) | |
1073 | * | |
1074 | * This assumes output has been stopped and | |
1075 | * we do not need to block ath_tx_tasklet. | |
1076 | */ | |
1077 | void ath_draintxq(struct ath_softc *sc, struct ath_txq *txq, bool retry_tx) | |
f078f209 | 1078 | { |
e8324357 S |
1079 | struct ath_buf *bf, *lastbf; |
1080 | struct list_head bf_head; | |
db1a052b FF |
1081 | struct ath_tx_status ts; |
1082 | ||
1083 | memset(&ts, 0, sizeof(ts)); | |
e8324357 | 1084 | INIT_LIST_HEAD(&bf_head); |
f078f209 | 1085 | |
e8324357 S |
1086 | for (;;) { |
1087 | spin_lock_bh(&txq->axq_lock); | |
f078f209 | 1088 | |
e5003249 VT |
1089 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
1090 | if (list_empty(&txq->txq_fifo[txq->txq_tailidx])) { | |
1091 | txq->txq_headidx = txq->txq_tailidx = 0; | |
1092 | spin_unlock_bh(&txq->axq_lock); | |
1093 | break; | |
1094 | } else { | |
1095 | bf = list_first_entry(&txq->txq_fifo[txq->txq_tailidx], | |
1096 | struct ath_buf, list); | |
1097 | } | |
1098 | } else { | |
1099 | if (list_empty(&txq->axq_q)) { | |
1100 | txq->axq_link = NULL; | |
1101 | spin_unlock_bh(&txq->axq_lock); | |
1102 | break; | |
1103 | } | |
1104 | bf = list_first_entry(&txq->axq_q, struct ath_buf, | |
1105 | list); | |
f078f209 | 1106 | |
e5003249 VT |
1107 | if (bf->bf_stale) { |
1108 | list_del(&bf->list); | |
1109 | spin_unlock_bh(&txq->axq_lock); | |
f078f209 | 1110 | |
0a8cea84 | 1111 | ath_tx_return_buffer(sc, bf); |
e5003249 VT |
1112 | continue; |
1113 | } | |
e8324357 | 1114 | } |
f078f209 | 1115 | |
e8324357 | 1116 | lastbf = bf->bf_lastbf; |
6d913f7d VT |
1117 | if (!retry_tx) |
1118 | lastbf->bf_tx_aborted = true; | |
f078f209 | 1119 | |
e5003249 VT |
1120 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
1121 | list_cut_position(&bf_head, | |
1122 | &txq->txq_fifo[txq->txq_tailidx], | |
1123 | &lastbf->list); | |
1124 | INCR(txq->txq_tailidx, ATH_TXFIFO_DEPTH); | |
1125 | } else { | |
1126 | /* remove ath_buf's of the same mpdu from txq */ | |
1127 | list_cut_position(&bf_head, &txq->axq_q, &lastbf->list); | |
1128 | } | |
1129 | ||
e8324357 | 1130 | txq->axq_depth--; |
f078f209 | 1131 | |
e8324357 S |
1132 | spin_unlock_bh(&txq->axq_lock); |
1133 | ||
1134 | if (bf_isampdu(bf)) | |
db1a052b | 1135 | ath_tx_complete_aggr(sc, txq, bf, &bf_head, &ts, 0); |
e8324357 | 1136 | else |
db1a052b | 1137 | ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 0); |
f078f209 LR |
1138 | } |
1139 | ||
164ace38 SB |
1140 | spin_lock_bh(&txq->axq_lock); |
1141 | txq->axq_tx_inprogress = false; | |
1142 | spin_unlock_bh(&txq->axq_lock); | |
1143 | ||
e8324357 S |
1144 | /* flush any pending frames if aggregation is enabled */ |
1145 | if (sc->sc_flags & SC_OP_TXAGGR) { | |
1146 | if (!retry_tx) { | |
1147 | spin_lock_bh(&txq->axq_lock); | |
1148 | ath_txq_drain_pending_buffers(sc, txq); | |
1149 | spin_unlock_bh(&txq->axq_lock); | |
1150 | } | |
1151 | } | |
e5003249 VT |
1152 | |
1153 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { | |
1154 | spin_lock_bh(&txq->axq_lock); | |
1155 | while (!list_empty(&txq->txq_fifo_pending)) { | |
1156 | bf = list_first_entry(&txq->txq_fifo_pending, | |
1157 | struct ath_buf, list); | |
1158 | list_cut_position(&bf_head, | |
1159 | &txq->txq_fifo_pending, | |
1160 | &bf->bf_lastbf->list); | |
1161 | spin_unlock_bh(&txq->axq_lock); | |
1162 | ||
1163 | if (bf_isampdu(bf)) | |
1164 | ath_tx_complete_aggr(sc, txq, bf, &bf_head, | |
1165 | &ts, 0); | |
1166 | else | |
1167 | ath_tx_complete_buf(sc, bf, txq, &bf_head, | |
1168 | &ts, 0, 0); | |
1169 | spin_lock_bh(&txq->axq_lock); | |
1170 | } | |
1171 | spin_unlock_bh(&txq->axq_lock); | |
1172 | } | |
f078f209 LR |
1173 | } |
1174 | ||
043a0405 | 1175 | void ath_drain_all_txq(struct ath_softc *sc, bool retry_tx) |
f078f209 | 1176 | { |
cbe61d8a | 1177 | struct ath_hw *ah = sc->sc_ah; |
c46917bb | 1178 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
043a0405 S |
1179 | struct ath_txq *txq; |
1180 | int i, npend = 0; | |
1181 | ||
1182 | if (sc->sc_flags & SC_OP_INVALID) | |
1183 | return; | |
1184 | ||
1185 | /* Stop beacon queue */ | |
1186 | ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq); | |
1187 | ||
1188 | /* Stop data queues */ | |
1189 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { | |
1190 | if (ATH_TXQ_SETUP(sc, i)) { | |
1191 | txq = &sc->tx.txq[i]; | |
1192 | ath9k_hw_stoptxdma(ah, txq->axq_qnum); | |
1193 | npend += ath9k_hw_numtxpending(ah, txq->axq_qnum); | |
1194 | } | |
1195 | } | |
1196 | ||
1197 | if (npend) { | |
1198 | int r; | |
1199 | ||
e8009e98 | 1200 | ath_print(common, ATH_DBG_FATAL, |
c46917bb | 1201 | "Unable to stop TxDMA. Reset HAL!\n"); |
043a0405 S |
1202 | |
1203 | spin_lock_bh(&sc->sc_resetlock); | |
e8009e98 | 1204 | r = ath9k_hw_reset(ah, sc->sc_ah->curchan, false); |
043a0405 | 1205 | if (r) |
c46917bb LR |
1206 | ath_print(common, ATH_DBG_FATAL, |
1207 | "Unable to reset hardware; reset status %d\n", | |
1208 | r); | |
043a0405 S |
1209 | spin_unlock_bh(&sc->sc_resetlock); |
1210 | } | |
1211 | ||
1212 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { | |
1213 | if (ATH_TXQ_SETUP(sc, i)) | |
1214 | ath_draintxq(sc, &sc->tx.txq[i], retry_tx); | |
1215 | } | |
e8324357 | 1216 | } |
f078f209 | 1217 | |
043a0405 | 1218 | void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq) |
e8324357 | 1219 | { |
043a0405 S |
1220 | ath9k_hw_releasetxqueue(sc->sc_ah, txq->axq_qnum); |
1221 | sc->tx.txqsetup &= ~(1<<txq->axq_qnum); | |
e8324357 | 1222 | } |
f078f209 | 1223 | |
e8324357 S |
1224 | void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq) |
1225 | { | |
1226 | struct ath_atx_ac *ac; | |
1227 | struct ath_atx_tid *tid; | |
f078f209 | 1228 | |
e8324357 S |
1229 | if (list_empty(&txq->axq_acq)) |
1230 | return; | |
f078f209 | 1231 | |
e8324357 S |
1232 | ac = list_first_entry(&txq->axq_acq, struct ath_atx_ac, list); |
1233 | list_del(&ac->list); | |
1234 | ac->sched = false; | |
f078f209 | 1235 | |
e8324357 S |
1236 | do { |
1237 | if (list_empty(&ac->tid_q)) | |
1238 | return; | |
f078f209 | 1239 | |
e8324357 S |
1240 | tid = list_first_entry(&ac->tid_q, struct ath_atx_tid, list); |
1241 | list_del(&tid->list); | |
1242 | tid->sched = false; | |
f078f209 | 1243 | |
e8324357 S |
1244 | if (tid->paused) |
1245 | continue; | |
f078f209 | 1246 | |
164ace38 | 1247 | ath_tx_sched_aggr(sc, txq, tid); |
f078f209 LR |
1248 | |
1249 | /* | |
e8324357 S |
1250 | * add tid to round-robin queue if more frames |
1251 | * are pending for the tid | |
f078f209 | 1252 | */ |
e8324357 S |
1253 | if (!list_empty(&tid->buf_q)) |
1254 | ath_tx_queue_tid(txq, tid); | |
f078f209 | 1255 | |
e8324357 S |
1256 | break; |
1257 | } while (!list_empty(&ac->tid_q)); | |
f078f209 | 1258 | |
e8324357 S |
1259 | if (!list_empty(&ac->tid_q)) { |
1260 | if (!ac->sched) { | |
1261 | ac->sched = true; | |
1262 | list_add_tail(&ac->list, &txq->axq_acq); | |
f078f209 | 1263 | } |
e8324357 S |
1264 | } |
1265 | } | |
f078f209 | 1266 | |
e8324357 S |
1267 | int ath_tx_setup(struct ath_softc *sc, int haltype) |
1268 | { | |
1269 | struct ath_txq *txq; | |
f078f209 | 1270 | |
e8324357 | 1271 | if (haltype >= ARRAY_SIZE(sc->tx.hwq_map)) { |
c46917bb LR |
1272 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL, |
1273 | "HAL AC %u out of range, max %zu!\n", | |
e8324357 S |
1274 | haltype, ARRAY_SIZE(sc->tx.hwq_map)); |
1275 | return 0; | |
1276 | } | |
1277 | txq = ath_txq_setup(sc, ATH9K_TX_QUEUE_DATA, haltype); | |
1278 | if (txq != NULL) { | |
1279 | sc->tx.hwq_map[haltype] = txq->axq_qnum; | |
1280 | return 1; | |
1281 | } else | |
1282 | return 0; | |
f078f209 LR |
1283 | } |
1284 | ||
e8324357 S |
1285 | /***********/ |
1286 | /* TX, DMA */ | |
1287 | /***********/ | |
1288 | ||
f078f209 | 1289 | /* |
e8324357 S |
1290 | * Insert a chain of ath_buf (descriptors) on a txq and |
1291 | * assume the descriptors are already chained together by caller. | |
f078f209 | 1292 | */ |
e8324357 S |
1293 | static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, |
1294 | struct list_head *head) | |
f078f209 | 1295 | { |
cbe61d8a | 1296 | struct ath_hw *ah = sc->sc_ah; |
c46917bb | 1297 | struct ath_common *common = ath9k_hw_common(ah); |
e8324357 | 1298 | struct ath_buf *bf; |
f078f209 | 1299 | |
e8324357 S |
1300 | /* |
1301 | * Insert the frame on the outbound list and | |
1302 | * pass it on to the hardware. | |
1303 | */ | |
f078f209 | 1304 | |
e8324357 S |
1305 | if (list_empty(head)) |
1306 | return; | |
f078f209 | 1307 | |
e8324357 | 1308 | bf = list_first_entry(head, struct ath_buf, list); |
f078f209 | 1309 | |
c46917bb LR |
1310 | ath_print(common, ATH_DBG_QUEUE, |
1311 | "qnum: %d, txq depth: %d\n", txq->axq_qnum, txq->axq_depth); | |
f078f209 | 1312 | |
e5003249 VT |
1313 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
1314 | if (txq->axq_depth >= ATH_TXFIFO_DEPTH) { | |
1315 | list_splice_tail_init(head, &txq->txq_fifo_pending); | |
1316 | return; | |
1317 | } | |
1318 | if (!list_empty(&txq->txq_fifo[txq->txq_headidx])) | |
1319 | ath_print(common, ATH_DBG_XMIT, | |
1320 | "Initializing tx fifo %d which " | |
1321 | "is non-empty\n", | |
1322 | txq->txq_headidx); | |
1323 | INIT_LIST_HEAD(&txq->txq_fifo[txq->txq_headidx]); | |
1324 | list_splice_init(head, &txq->txq_fifo[txq->txq_headidx]); | |
1325 | INCR(txq->txq_headidx, ATH_TXFIFO_DEPTH); | |
e8324357 | 1326 | ath9k_hw_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); |
c46917bb LR |
1327 | ath_print(common, ATH_DBG_XMIT, |
1328 | "TXDP[%u] = %llx (%p)\n", | |
1329 | txq->axq_qnum, ito64(bf->bf_daddr), bf->bf_desc); | |
e8324357 | 1330 | } else { |
e5003249 VT |
1331 | list_splice_tail_init(head, &txq->axq_q); |
1332 | ||
1333 | if (txq->axq_link == NULL) { | |
1334 | ath9k_hw_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); | |
1335 | ath_print(common, ATH_DBG_XMIT, | |
1336 | "TXDP[%u] = %llx (%p)\n", | |
1337 | txq->axq_qnum, ito64(bf->bf_daddr), | |
1338 | bf->bf_desc); | |
1339 | } else { | |
1340 | *txq->axq_link = bf->bf_daddr; | |
1341 | ath_print(common, ATH_DBG_XMIT, | |
1342 | "link[%u] (%p)=%llx (%p)\n", | |
1343 | txq->axq_qnum, txq->axq_link, | |
1344 | ito64(bf->bf_daddr), bf->bf_desc); | |
1345 | } | |
1346 | ath9k_hw_get_desc_link(ah, bf->bf_lastbf->bf_desc, | |
1347 | &txq->axq_link); | |
1348 | ath9k_hw_txstart(ah, txq->axq_qnum); | |
e8324357 | 1349 | } |
e5003249 | 1350 | txq->axq_depth++; |
e8324357 | 1351 | } |
f078f209 | 1352 | |
e8324357 S |
1353 | static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid, |
1354 | struct list_head *bf_head, | |
1355 | struct ath_tx_control *txctl) | |
f078f209 LR |
1356 | { |
1357 | struct ath_buf *bf; | |
f078f209 | 1358 | |
e8324357 S |
1359 | bf = list_first_entry(bf_head, struct ath_buf, list); |
1360 | bf->bf_state.bf_type |= BUF_AMPDU; | |
fec247c0 | 1361 | TX_STAT_INC(txctl->txq->axq_qnum, a_queued); |
f078f209 | 1362 | |
e8324357 S |
1363 | /* |
1364 | * Do not queue to h/w when any of the following conditions is true: | |
1365 | * - there are pending frames in software queue | |
1366 | * - the TID is currently paused for ADDBA/BAR request | |
1367 | * - seqno is not within block-ack window | |
1368 | * - h/w queue depth exceeds low water mark | |
1369 | */ | |
1370 | if (!list_empty(&tid->buf_q) || tid->paused || | |
1371 | !BAW_WITHIN(tid->seq_start, tid->baw_size, bf->bf_seqno) || | |
1372 | txctl->txq->axq_depth >= ATH_AGGR_MIN_QDEPTH) { | |
f078f209 | 1373 | /* |
e8324357 S |
1374 | * Add this frame to software queue for scheduling later |
1375 | * for aggregation. | |
f078f209 | 1376 | */ |
d43f3015 | 1377 | list_move_tail(&bf->list, &tid->buf_q); |
e8324357 S |
1378 | ath_tx_queue_tid(txctl->txq, tid); |
1379 | return; | |
1380 | } | |
1381 | ||
1382 | /* Add sub-frame to BAW */ | |
1383 | ath_tx_addto_baw(sc, tid, bf); | |
1384 | ||
1385 | /* Queue to h/w without aggregation */ | |
1386 | bf->bf_nframes = 1; | |
d43f3015 | 1387 | bf->bf_lastbf = bf; |
e8324357 S |
1388 | ath_buf_set_rate(sc, bf); |
1389 | ath_tx_txqaddbuf(sc, txctl->txq, bf_head); | |
e8324357 S |
1390 | } |
1391 | ||
c37452b0 S |
1392 | static void ath_tx_send_ht_normal(struct ath_softc *sc, struct ath_txq *txq, |
1393 | struct ath_atx_tid *tid, | |
1394 | struct list_head *bf_head) | |
e8324357 S |
1395 | { |
1396 | struct ath_buf *bf; | |
1397 | ||
e8324357 S |
1398 | bf = list_first_entry(bf_head, struct ath_buf, list); |
1399 | bf->bf_state.bf_type &= ~BUF_AMPDU; | |
1400 | ||
1401 | /* update starting sequence number for subsequent ADDBA request */ | |
1402 | INCR(tid->seq_start, IEEE80211_SEQ_MAX); | |
1403 | ||
1404 | bf->bf_nframes = 1; | |
d43f3015 | 1405 | bf->bf_lastbf = bf; |
e8324357 S |
1406 | ath_buf_set_rate(sc, bf); |
1407 | ath_tx_txqaddbuf(sc, txq, bf_head); | |
fec247c0 | 1408 | TX_STAT_INC(txq->axq_qnum, queued); |
e8324357 S |
1409 | } |
1410 | ||
c37452b0 S |
1411 | static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq, |
1412 | struct list_head *bf_head) | |
1413 | { | |
1414 | struct ath_buf *bf; | |
1415 | ||
1416 | bf = list_first_entry(bf_head, struct ath_buf, list); | |
1417 | ||
1418 | bf->bf_lastbf = bf; | |
1419 | bf->bf_nframes = 1; | |
1420 | ath_buf_set_rate(sc, bf); | |
1421 | ath_tx_txqaddbuf(sc, txq, bf_head); | |
fec247c0 | 1422 | TX_STAT_INC(txq->axq_qnum, queued); |
c37452b0 S |
1423 | } |
1424 | ||
e8324357 S |
1425 | static enum ath9k_pkt_type get_hw_packet_type(struct sk_buff *skb) |
1426 | { | |
1427 | struct ieee80211_hdr *hdr; | |
1428 | enum ath9k_pkt_type htype; | |
1429 | __le16 fc; | |
1430 | ||
1431 | hdr = (struct ieee80211_hdr *)skb->data; | |
1432 | fc = hdr->frame_control; | |
1433 | ||
1434 | if (ieee80211_is_beacon(fc)) | |
1435 | htype = ATH9K_PKT_TYPE_BEACON; | |
1436 | else if (ieee80211_is_probe_resp(fc)) | |
1437 | htype = ATH9K_PKT_TYPE_PROBE_RESP; | |
1438 | else if (ieee80211_is_atim(fc)) | |
1439 | htype = ATH9K_PKT_TYPE_ATIM; | |
1440 | else if (ieee80211_is_pspoll(fc)) | |
1441 | htype = ATH9K_PKT_TYPE_PSPOLL; | |
1442 | else | |
1443 | htype = ATH9K_PKT_TYPE_NORMAL; | |
1444 | ||
1445 | return htype; | |
1446 | } | |
1447 | ||
e8324357 S |
1448 | static int get_hw_crypto_keytype(struct sk_buff *skb) |
1449 | { | |
1450 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); | |
1451 | ||
1452 | if (tx_info->control.hw_key) { | |
1453 | if (tx_info->control.hw_key->alg == ALG_WEP) | |
1454 | return ATH9K_KEY_TYPE_WEP; | |
1455 | else if (tx_info->control.hw_key->alg == ALG_TKIP) | |
1456 | return ATH9K_KEY_TYPE_TKIP; | |
1457 | else if (tx_info->control.hw_key->alg == ALG_CCMP) | |
1458 | return ATH9K_KEY_TYPE_AES; | |
1459 | } | |
1460 | ||
1461 | return ATH9K_KEY_TYPE_CLEAR; | |
1462 | } | |
1463 | ||
1464 | static void assign_aggr_tid_seqno(struct sk_buff *skb, | |
1465 | struct ath_buf *bf) | |
1466 | { | |
1467 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); | |
1468 | struct ieee80211_hdr *hdr; | |
1469 | struct ath_node *an; | |
1470 | struct ath_atx_tid *tid; | |
1471 | __le16 fc; | |
1472 | u8 *qc; | |
1473 | ||
1474 | if (!tx_info->control.sta) | |
1475 | return; | |
1476 | ||
1477 | an = (struct ath_node *)tx_info->control.sta->drv_priv; | |
1478 | hdr = (struct ieee80211_hdr *)skb->data; | |
1479 | fc = hdr->frame_control; | |
1480 | ||
1481 | if (ieee80211_is_data_qos(fc)) { | |
1482 | qc = ieee80211_get_qos_ctl(hdr); | |
1483 | bf->bf_tidno = qc[0] & 0xf; | |
1484 | } | |
1485 | ||
1486 | /* | |
1487 | * For HT capable stations, we save tidno for later use. | |
1488 | * We also override seqno set by upper layer with the one | |
1489 | * in tx aggregation state. | |
e8324357 S |
1490 | */ |
1491 | tid = ATH_AN_2_TID(an, bf->bf_tidno); | |
17b182e3 | 1492 | hdr->seq_ctrl = cpu_to_le16(tid->seq_next << IEEE80211_SEQ_SEQ_SHIFT); |
e8324357 S |
1493 | bf->bf_seqno = tid->seq_next; |
1494 | INCR(tid->seq_next, IEEE80211_SEQ_MAX); | |
1495 | } | |
1496 | ||
b0a33448 | 1497 | static int setup_tx_flags(struct sk_buff *skb, bool use_ldpc) |
e8324357 S |
1498 | { |
1499 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); | |
1500 | int flags = 0; | |
1501 | ||
1502 | flags |= ATH9K_TXDESC_CLRDMASK; /* needed for crypto errors */ | |
1503 | flags |= ATH9K_TXDESC_INTREQ; | |
1504 | ||
1505 | if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK) | |
1506 | flags |= ATH9K_TXDESC_NOACK; | |
e8324357 | 1507 | |
b0a33448 LR |
1508 | if (use_ldpc) |
1509 | flags |= ATH9K_TXDESC_LDPC; | |
1510 | ||
e8324357 S |
1511 | return flags; |
1512 | } | |
1513 | ||
1514 | /* | |
1515 | * rix - rate index | |
1516 | * pktlen - total bytes (delims + data + fcs + pads + pad delims) | |
1517 | * width - 0 for 20 MHz, 1 for 40 MHz | |
1518 | * half_gi - to use 4us v/s 3.6 us for symbol time | |
1519 | */ | |
1520 | static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, struct ath_buf *bf, | |
1521 | int width, int half_gi, bool shortPreamble) | |
1522 | { | |
e8324357 | 1523 | u32 nbits, nsymbits, duration, nsymbols; |
e8324357 S |
1524 | int streams, pktlen; |
1525 | ||
1526 | pktlen = bf_isaggr(bf) ? bf->bf_al : bf->bf_frmlen; | |
e8324357 S |
1527 | |
1528 | /* find number of symbols: PLCP + data */ | |
c6663876 | 1529 | streams = HT_RC_2_STREAMS(rix); |
e8324357 | 1530 | nbits = (pktlen << 3) + OFDM_PLCP_BITS; |
c6663876 | 1531 | nsymbits = bits_per_symbol[rix % 8][width] * streams; |
e8324357 S |
1532 | nsymbols = (nbits + nsymbits - 1) / nsymbits; |
1533 | ||
1534 | if (!half_gi) | |
1535 | duration = SYMBOL_TIME(nsymbols); | |
1536 | else | |
1537 | duration = SYMBOL_TIME_HALFGI(nsymbols); | |
1538 | ||
1539 | /* addup duration for legacy/ht training and signal fields */ | |
e8324357 S |
1540 | duration += L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams); |
1541 | ||
1542 | return duration; | |
1543 | } | |
1544 | ||
1545 | static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf) | |
1546 | { | |
43c27613 | 1547 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
e8324357 S |
1548 | struct ath9k_11n_rate_series series[4]; |
1549 | struct sk_buff *skb; | |
1550 | struct ieee80211_tx_info *tx_info; | |
1551 | struct ieee80211_tx_rate *rates; | |
545750d3 | 1552 | const struct ieee80211_rate *rate; |
254ad0ff | 1553 | struct ieee80211_hdr *hdr; |
c89424df S |
1554 | int i, flags = 0; |
1555 | u8 rix = 0, ctsrate = 0; | |
254ad0ff | 1556 | bool is_pspoll; |
e8324357 S |
1557 | |
1558 | memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4); | |
1559 | ||
a22be22a | 1560 | skb = bf->bf_mpdu; |
e8324357 S |
1561 | tx_info = IEEE80211_SKB_CB(skb); |
1562 | rates = tx_info->control.rates; | |
254ad0ff S |
1563 | hdr = (struct ieee80211_hdr *)skb->data; |
1564 | is_pspoll = ieee80211_is_pspoll(hdr->frame_control); | |
e8324357 | 1565 | |
e8324357 | 1566 | /* |
c89424df S |
1567 | * We check if Short Preamble is needed for the CTS rate by |
1568 | * checking the BSS's global flag. | |
1569 | * But for the rate series, IEEE80211_TX_RC_USE_SHORT_PREAMBLE is used. | |
e8324357 | 1570 | */ |
545750d3 FF |
1571 | rate = ieee80211_get_rts_cts_rate(sc->hw, tx_info); |
1572 | ctsrate = rate->hw_value; | |
c89424df | 1573 | if (sc->sc_flags & SC_OP_PREAMBLE_SHORT) |
545750d3 | 1574 | ctsrate |= rate->hw_value_short; |
e8324357 | 1575 | |
e8324357 | 1576 | for (i = 0; i < 4; i++) { |
545750d3 FF |
1577 | bool is_40, is_sgi, is_sp; |
1578 | int phy; | |
1579 | ||
e8324357 S |
1580 | if (!rates[i].count || (rates[i].idx < 0)) |
1581 | continue; | |
1582 | ||
1583 | rix = rates[i].idx; | |
e8324357 | 1584 | series[i].Tries = rates[i].count; |
43c27613 | 1585 | series[i].ChSel = common->tx_chainmask; |
e8324357 | 1586 | |
27032059 FF |
1587 | if ((sc->config.ath_aggr_prot && bf_isaggr(bf)) || |
1588 | (rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS)) { | |
c89424df | 1589 | series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; |
27032059 FF |
1590 | flags |= ATH9K_TXDESC_RTSENA; |
1591 | } else if (rates[i].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { | |
1592 | series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; | |
1593 | flags |= ATH9K_TXDESC_CTSENA; | |
1594 | } | |
1595 | ||
c89424df S |
1596 | if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) |
1597 | series[i].RateFlags |= ATH9K_RATESERIES_2040; | |
1598 | if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI) | |
1599 | series[i].RateFlags |= ATH9K_RATESERIES_HALFGI; | |
e8324357 | 1600 | |
545750d3 FF |
1601 | is_sgi = !!(rates[i].flags & IEEE80211_TX_RC_SHORT_GI); |
1602 | is_40 = !!(rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH); | |
1603 | is_sp = !!(rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE); | |
1604 | ||
1605 | if (rates[i].flags & IEEE80211_TX_RC_MCS) { | |
1606 | /* MCS rates */ | |
1607 | series[i].Rate = rix | 0x80; | |
1608 | series[i].PktDuration = ath_pkt_duration(sc, rix, bf, | |
1609 | is_40, is_sgi, is_sp); | |
1610 | continue; | |
1611 | } | |
1612 | ||
1613 | /* legcay rates */ | |
1614 | if ((tx_info->band == IEEE80211_BAND_2GHZ) && | |
1615 | !(rate->flags & IEEE80211_RATE_ERP_G)) | |
1616 | phy = WLAN_RC_PHY_CCK; | |
1617 | else | |
1618 | phy = WLAN_RC_PHY_OFDM; | |
1619 | ||
1620 | rate = &sc->sbands[tx_info->band].bitrates[rates[i].idx]; | |
1621 | series[i].Rate = rate->hw_value; | |
1622 | if (rate->hw_value_short) { | |
1623 | if (rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) | |
1624 | series[i].Rate |= rate->hw_value_short; | |
1625 | } else { | |
1626 | is_sp = false; | |
1627 | } | |
1628 | ||
1629 | series[i].PktDuration = ath9k_hw_computetxtime(sc->sc_ah, | |
1630 | phy, rate->bitrate * 100, bf->bf_frmlen, rix, is_sp); | |
f078f209 LR |
1631 | } |
1632 | ||
27032059 FF |
1633 | /* For AR5416 - RTS cannot be followed by a frame larger than 8K */ |
1634 | if (bf_isaggr(bf) && (bf->bf_al > sc->sc_ah->caps.rts_aggr_limit)) | |
1635 | flags &= ~ATH9K_TXDESC_RTSENA; | |
1636 | ||
1637 | /* ATH9K_TXDESC_RTSENA and ATH9K_TXDESC_CTSENA are mutually exclusive. */ | |
1638 | if (flags & ATH9K_TXDESC_RTSENA) | |
1639 | flags &= ~ATH9K_TXDESC_CTSENA; | |
1640 | ||
e8324357 | 1641 | /* set dur_update_en for l-sig computation except for PS-Poll frames */ |
c89424df S |
1642 | ath9k_hw_set11n_ratescenario(sc->sc_ah, bf->bf_desc, |
1643 | bf->bf_lastbf->bf_desc, | |
254ad0ff | 1644 | !is_pspoll, ctsrate, |
c89424df | 1645 | 0, series, 4, flags); |
f078f209 | 1646 | |
17d7904d | 1647 | if (sc->config.ath_aggr_prot && flags) |
c89424df | 1648 | ath9k_hw_set11n_burstduration(sc->sc_ah, bf->bf_desc, 8192); |
f078f209 LR |
1649 | } |
1650 | ||
c52f33d0 | 1651 | static int ath_tx_setup_buffer(struct ieee80211_hw *hw, struct ath_buf *bf, |
8f93b8b3 | 1652 | struct sk_buff *skb, |
528f0c6b | 1653 | struct ath_tx_control *txctl) |
f078f209 | 1654 | { |
c52f33d0 JM |
1655 | struct ath_wiphy *aphy = hw->priv; |
1656 | struct ath_softc *sc = aphy->sc; | |
528f0c6b S |
1657 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
1658 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
528f0c6b S |
1659 | int hdrlen; |
1660 | __le16 fc; | |
1bc14880 | 1661 | int padpos, padsize; |
b0a33448 | 1662 | bool use_ldpc = false; |
e022edbd | 1663 | |
827e69bf FF |
1664 | tx_info->pad[0] = 0; |
1665 | switch (txctl->frame_type) { | |
c81494d5 | 1666 | case ATH9K_IFT_NOT_INTERNAL: |
827e69bf | 1667 | break; |
c81494d5 | 1668 | case ATH9K_IFT_PAUSE: |
827e69bf FF |
1669 | tx_info->pad[0] |= ATH_TX_INFO_FRAME_TYPE_PAUSE; |
1670 | /* fall through */ | |
c81494d5 | 1671 | case ATH9K_IFT_UNPAUSE: |
827e69bf FF |
1672 | tx_info->pad[0] |= ATH_TX_INFO_FRAME_TYPE_INTERNAL; |
1673 | break; | |
1674 | } | |
528f0c6b S |
1675 | hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
1676 | fc = hdr->frame_control; | |
f078f209 | 1677 | |
528f0c6b | 1678 | ATH_TXBUF_RESET(bf); |
f078f209 | 1679 | |
827e69bf | 1680 | bf->aphy = aphy; |
1bc14880 BP |
1681 | bf->bf_frmlen = skb->len + FCS_LEN; |
1682 | /* Remove the padding size from bf_frmlen, if any */ | |
1683 | padpos = ath9k_cmn_padpos(hdr->frame_control); | |
1684 | padsize = padpos & 3; | |
1685 | if (padsize && skb->len>padpos+padsize) { | |
1686 | bf->bf_frmlen -= padsize; | |
1687 | } | |
cd3d39a6 | 1688 | |
b0a33448 | 1689 | if (conf_is_ht(&hw->conf)) { |
c656bbb5 | 1690 | bf->bf_state.bf_type |= BUF_HT; |
b0a33448 LR |
1691 | if (tx_info->flags & IEEE80211_TX_CTL_LDPC) |
1692 | use_ldpc = true; | |
1693 | } | |
528f0c6b | 1694 | |
b0a33448 | 1695 | bf->bf_flags = setup_tx_flags(skb, use_ldpc); |
528f0c6b | 1696 | |
528f0c6b | 1697 | bf->bf_keytype = get_hw_crypto_keytype(skb); |
528f0c6b S |
1698 | if (bf->bf_keytype != ATH9K_KEY_TYPE_CLEAR) { |
1699 | bf->bf_frmlen += tx_info->control.hw_key->icv_len; | |
1700 | bf->bf_keyix = tx_info->control.hw_key->hw_key_idx; | |
1701 | } else { | |
1702 | bf->bf_keyix = ATH9K_TXKEYIX_INVALID; | |
1703 | } | |
1704 | ||
17b182e3 S |
1705 | if (ieee80211_is_data_qos(fc) && bf_isht(bf) && |
1706 | (sc->sc_flags & SC_OP_TXAGGR)) | |
528f0c6b S |
1707 | assign_aggr_tid_seqno(skb, bf); |
1708 | ||
f078f209 | 1709 | bf->bf_mpdu = skb; |
f8316df1 | 1710 | |
7da3c55c GJ |
1711 | bf->bf_dmacontext = dma_map_single(sc->dev, skb->data, |
1712 | skb->len, DMA_TO_DEVICE); | |
1713 | if (unlikely(dma_mapping_error(sc->dev, bf->bf_dmacontext))) { | |
f8316df1 | 1714 | bf->bf_mpdu = NULL; |
c46917bb LR |
1715 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL, |
1716 | "dma_mapping_error() on TX\n"); | |
f8316df1 LR |
1717 | return -ENOMEM; |
1718 | } | |
1719 | ||
528f0c6b | 1720 | bf->bf_buf_addr = bf->bf_dmacontext; |
e7824a50 LR |
1721 | |
1722 | /* tag if this is a nullfunc frame to enable PS when AP acks it */ | |
1723 | if (ieee80211_is_nullfunc(fc) && ieee80211_has_pm(fc)) { | |
1724 | bf->bf_isnullfunc = true; | |
1b04b930 | 1725 | sc->ps_flags &= ~PS_NULLFUNC_COMPLETED; |
e7824a50 LR |
1726 | } else |
1727 | bf->bf_isnullfunc = false; | |
1728 | ||
f8316df1 | 1729 | return 0; |
528f0c6b S |
1730 | } |
1731 | ||
1732 | /* FIXME: tx power */ | |
1733 | static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf, | |
528f0c6b S |
1734 | struct ath_tx_control *txctl) |
1735 | { | |
a22be22a | 1736 | struct sk_buff *skb = bf->bf_mpdu; |
528f0c6b | 1737 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
c37452b0 | 1738 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
528f0c6b S |
1739 | struct ath_node *an = NULL; |
1740 | struct list_head bf_head; | |
1741 | struct ath_desc *ds; | |
1742 | struct ath_atx_tid *tid; | |
cbe61d8a | 1743 | struct ath_hw *ah = sc->sc_ah; |
528f0c6b | 1744 | int frm_type; |
c37452b0 | 1745 | __le16 fc; |
528f0c6b | 1746 | |
528f0c6b | 1747 | frm_type = get_hw_packet_type(skb); |
c37452b0 | 1748 | fc = hdr->frame_control; |
528f0c6b S |
1749 | |
1750 | INIT_LIST_HEAD(&bf_head); | |
1751 | list_add_tail(&bf->list, &bf_head); | |
f078f209 | 1752 | |
f078f209 | 1753 | ds = bf->bf_desc; |
87d5efbb | 1754 | ath9k_hw_set_desc_link(ah, ds, 0); |
f078f209 | 1755 | |
528f0c6b S |
1756 | ath9k_hw_set11n_txdesc(ah, ds, bf->bf_frmlen, frm_type, MAX_RATE_POWER, |
1757 | bf->bf_keyix, bf->bf_keytype, bf->bf_flags); | |
1758 | ||
1759 | ath9k_hw_filltxdesc(ah, ds, | |
8f93b8b3 S |
1760 | skb->len, /* segment length */ |
1761 | true, /* first segment */ | |
1762 | true, /* last segment */ | |
3f3a1c80 | 1763 | ds, /* first descriptor */ |
cc610ac0 VT |
1764 | bf->bf_buf_addr, |
1765 | txctl->txq->axq_qnum); | |
f078f209 | 1766 | |
528f0c6b | 1767 | spin_lock_bh(&txctl->txq->axq_lock); |
f078f209 | 1768 | |
f1617967 JL |
1769 | if (bf_isht(bf) && (sc->sc_flags & SC_OP_TXAGGR) && |
1770 | tx_info->control.sta) { | |
1771 | an = (struct ath_node *)tx_info->control.sta->drv_priv; | |
1772 | tid = ATH_AN_2_TID(an, bf->bf_tidno); | |
1773 | ||
c37452b0 S |
1774 | if (!ieee80211_is_data_qos(fc)) { |
1775 | ath_tx_send_normal(sc, txctl->txq, &bf_head); | |
1776 | goto tx_done; | |
1777 | } | |
1778 | ||
4fdec031 | 1779 | if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) { |
f078f209 LR |
1780 | /* |
1781 | * Try aggregation if it's a unicast data frame | |
1782 | * and the destination is HT capable. | |
1783 | */ | |
528f0c6b | 1784 | ath_tx_send_ampdu(sc, tid, &bf_head, txctl); |
f078f209 LR |
1785 | } else { |
1786 | /* | |
528f0c6b S |
1787 | * Send this frame as regular when ADDBA |
1788 | * exchange is neither complete nor pending. | |
f078f209 | 1789 | */ |
c37452b0 S |
1790 | ath_tx_send_ht_normal(sc, txctl->txq, |
1791 | tid, &bf_head); | |
f078f209 LR |
1792 | } |
1793 | } else { | |
c37452b0 | 1794 | ath_tx_send_normal(sc, txctl->txq, &bf_head); |
f078f209 | 1795 | } |
528f0c6b | 1796 | |
c37452b0 | 1797 | tx_done: |
528f0c6b | 1798 | spin_unlock_bh(&txctl->txq->axq_lock); |
f078f209 LR |
1799 | } |
1800 | ||
f8316df1 | 1801 | /* Upon failure caller should free skb */ |
c52f33d0 | 1802 | int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb, |
528f0c6b | 1803 | struct ath_tx_control *txctl) |
f078f209 | 1804 | { |
c52f33d0 JM |
1805 | struct ath_wiphy *aphy = hw->priv; |
1806 | struct ath_softc *sc = aphy->sc; | |
c46917bb | 1807 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
528f0c6b | 1808 | struct ath_buf *bf; |
f8316df1 | 1809 | int r; |
f078f209 | 1810 | |
528f0c6b S |
1811 | bf = ath_tx_get_buffer(sc); |
1812 | if (!bf) { | |
c46917bb | 1813 | ath_print(common, ATH_DBG_XMIT, "TX buffers are full\n"); |
528f0c6b S |
1814 | return -1; |
1815 | } | |
1816 | ||
c52f33d0 | 1817 | r = ath_tx_setup_buffer(hw, bf, skb, txctl); |
f8316df1 | 1818 | if (unlikely(r)) { |
c112d0c5 LR |
1819 | struct ath_txq *txq = txctl->txq; |
1820 | ||
c46917bb | 1821 | ath_print(common, ATH_DBG_FATAL, "TX mem alloc failure\n"); |
c112d0c5 LR |
1822 | |
1823 | /* upon ath_tx_processq() this TX queue will be resumed, we | |
1824 | * guarantee this will happen by knowing beforehand that | |
1825 | * we will at least have to run TX completionon one buffer | |
1826 | * on the queue */ | |
1827 | spin_lock_bh(&txq->axq_lock); | |
f7a99e46 | 1828 | if (sc->tx.txq[txq->axq_qnum].axq_depth > 1) { |
f52de03b | 1829 | ath_mac80211_stop_queue(sc, skb_get_queue_mapping(skb)); |
c112d0c5 LR |
1830 | txq->stopped = 1; |
1831 | } | |
1832 | spin_unlock_bh(&txq->axq_lock); | |
1833 | ||
0a8cea84 | 1834 | ath_tx_return_buffer(sc, bf); |
c112d0c5 | 1835 | |
f8316df1 LR |
1836 | return r; |
1837 | } | |
1838 | ||
8f93b8b3 | 1839 | ath_tx_start_dma(sc, bf, txctl); |
f078f209 | 1840 | |
528f0c6b | 1841 | return 0; |
f078f209 LR |
1842 | } |
1843 | ||
c52f33d0 | 1844 | void ath_tx_cabq(struct ieee80211_hw *hw, struct sk_buff *skb) |
f078f209 | 1845 | { |
c52f33d0 JM |
1846 | struct ath_wiphy *aphy = hw->priv; |
1847 | struct ath_softc *sc = aphy->sc; | |
c46917bb | 1848 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
4d91f9f3 BP |
1849 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
1850 | int padpos, padsize; | |
e8324357 S |
1851 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1852 | struct ath_tx_control txctl; | |
f078f209 | 1853 | |
e8324357 | 1854 | memset(&txctl, 0, sizeof(struct ath_tx_control)); |
f078f209 LR |
1855 | |
1856 | /* | |
e8324357 S |
1857 | * As a temporary workaround, assign seq# here; this will likely need |
1858 | * to be cleaned up to work better with Beacon transmission and virtual | |
1859 | * BSSes. | |
f078f209 | 1860 | */ |
e8324357 | 1861 | if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { |
e8324357 S |
1862 | if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) |
1863 | sc->tx.seq_no += 0x10; | |
1864 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); | |
1865 | hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no); | |
f078f209 | 1866 | } |
f078f209 | 1867 | |
e8324357 | 1868 | /* Add the padding after the header if this is not already done */ |
4d91f9f3 BP |
1869 | padpos = ath9k_cmn_padpos(hdr->frame_control); |
1870 | padsize = padpos & 3; | |
1871 | if (padsize && skb->len>padpos) { | |
e8324357 | 1872 | if (skb_headroom(skb) < padsize) { |
c46917bb LR |
1873 | ath_print(common, ATH_DBG_XMIT, |
1874 | "TX CABQ padding failed\n"); | |
e8324357 S |
1875 | dev_kfree_skb_any(skb); |
1876 | return; | |
1877 | } | |
1878 | skb_push(skb, padsize); | |
4d91f9f3 | 1879 | memmove(skb->data, skb->data + padsize, padpos); |
f078f209 | 1880 | } |
f078f209 | 1881 | |
e8324357 | 1882 | txctl.txq = sc->beacon.cabq; |
f078f209 | 1883 | |
c46917bb LR |
1884 | ath_print(common, ATH_DBG_XMIT, |
1885 | "transmitting CABQ packet, skb: %p\n", skb); | |
f078f209 | 1886 | |
c52f33d0 | 1887 | if (ath_tx_start(hw, skb, &txctl) != 0) { |
c46917bb | 1888 | ath_print(common, ATH_DBG_XMIT, "CABQ TX failed\n"); |
e8324357 | 1889 | goto exit; |
f078f209 | 1890 | } |
f078f209 | 1891 | |
e8324357 S |
1892 | return; |
1893 | exit: | |
1894 | dev_kfree_skb_any(skb); | |
f078f209 LR |
1895 | } |
1896 | ||
e8324357 S |
1897 | /*****************/ |
1898 | /* TX Completion */ | |
1899 | /*****************/ | |
528f0c6b | 1900 | |
e8324357 | 1901 | static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb, |
827e69bf | 1902 | struct ath_wiphy *aphy, int tx_flags) |
528f0c6b | 1903 | { |
e8324357 S |
1904 | struct ieee80211_hw *hw = sc->hw; |
1905 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); | |
c46917bb | 1906 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
4d91f9f3 BP |
1907 | struct ieee80211_hdr * hdr = (struct ieee80211_hdr *)skb->data; |
1908 | int padpos, padsize; | |
528f0c6b | 1909 | |
c46917bb | 1910 | ath_print(common, ATH_DBG_XMIT, "TX complete: skb: %p\n", skb); |
528f0c6b | 1911 | |
827e69bf FF |
1912 | if (aphy) |
1913 | hw = aphy->hw; | |
528f0c6b | 1914 | |
6b2c4032 | 1915 | if (tx_flags & ATH_TX_BAR) |
e8324357 | 1916 | tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; |
e8324357 | 1917 | |
6b2c4032 | 1918 | if (!(tx_flags & (ATH_TX_ERROR | ATH_TX_XRETRY))) { |
e8324357 S |
1919 | /* Frame was ACKed */ |
1920 | tx_info->flags |= IEEE80211_TX_STAT_ACK; | |
528f0c6b S |
1921 | } |
1922 | ||
4d91f9f3 BP |
1923 | padpos = ath9k_cmn_padpos(hdr->frame_control); |
1924 | padsize = padpos & 3; | |
1925 | if (padsize && skb->len>padpos+padsize) { | |
e8324357 S |
1926 | /* |
1927 | * Remove MAC header padding before giving the frame back to | |
1928 | * mac80211. | |
1929 | */ | |
4d91f9f3 | 1930 | memmove(skb->data + padsize, skb->data, padpos); |
e8324357 S |
1931 | skb_pull(skb, padsize); |
1932 | } | |
528f0c6b | 1933 | |
1b04b930 S |
1934 | if (sc->ps_flags & PS_WAIT_FOR_TX_ACK) { |
1935 | sc->ps_flags &= ~PS_WAIT_FOR_TX_ACK; | |
c46917bb LR |
1936 | ath_print(common, ATH_DBG_PS, |
1937 | "Going back to sleep after having " | |
f643e51d | 1938 | "received TX status (0x%lx)\n", |
1b04b930 S |
1939 | sc->ps_flags & (PS_WAIT_FOR_BEACON | |
1940 | PS_WAIT_FOR_CAB | | |
1941 | PS_WAIT_FOR_PSPOLL_DATA | | |
1942 | PS_WAIT_FOR_TX_ACK)); | |
9a23f9ca JM |
1943 | } |
1944 | ||
827e69bf | 1945 | if (unlikely(tx_info->pad[0] & ATH_TX_INFO_FRAME_TYPE_INTERNAL)) |
f0ed85c6 | 1946 | ath9k_tx_status(hw, skb); |
827e69bf FF |
1947 | else |
1948 | ieee80211_tx_status(hw, skb); | |
e8324357 | 1949 | } |
f078f209 | 1950 | |
e8324357 | 1951 | static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, |
db1a052b FF |
1952 | struct ath_txq *txq, struct list_head *bf_q, |
1953 | struct ath_tx_status *ts, int txok, int sendbar) | |
f078f209 | 1954 | { |
e8324357 | 1955 | struct sk_buff *skb = bf->bf_mpdu; |
e8324357 | 1956 | unsigned long flags; |
6b2c4032 | 1957 | int tx_flags = 0; |
f078f209 | 1958 | |
e8324357 | 1959 | if (sendbar) |
6b2c4032 | 1960 | tx_flags = ATH_TX_BAR; |
f078f209 | 1961 | |
e8324357 | 1962 | if (!txok) { |
6b2c4032 | 1963 | tx_flags |= ATH_TX_ERROR; |
f078f209 | 1964 | |
e8324357 | 1965 | if (bf_isxretried(bf)) |
6b2c4032 | 1966 | tx_flags |= ATH_TX_XRETRY; |
f078f209 LR |
1967 | } |
1968 | ||
e8324357 | 1969 | dma_unmap_single(sc->dev, bf->bf_dmacontext, skb->len, DMA_TO_DEVICE); |
827e69bf | 1970 | ath_tx_complete(sc, skb, bf->aphy, tx_flags); |
db1a052b | 1971 | ath_debug_stat_tx(sc, txq, bf, ts); |
e8324357 S |
1972 | |
1973 | /* | |
1974 | * Return the list of ath_buf of this mpdu to free queue | |
1975 | */ | |
1976 | spin_lock_irqsave(&sc->tx.txbuflock, flags); | |
1977 | list_splice_tail_init(bf_q, &sc->tx.txbuf); | |
1978 | spin_unlock_irqrestore(&sc->tx.txbuflock, flags); | |
f078f209 LR |
1979 | } |
1980 | ||
e8324357 | 1981 | static int ath_tx_num_badfrms(struct ath_softc *sc, struct ath_buf *bf, |
db1a052b | 1982 | struct ath_tx_status *ts, int txok) |
f078f209 | 1983 | { |
e8324357 S |
1984 | u16 seq_st = 0; |
1985 | u32 ba[WME_BA_BMP_SIZE >> 5]; | |
1986 | int ba_index; | |
1987 | int nbad = 0; | |
1988 | int isaggr = 0; | |
f078f209 | 1989 | |
6d913f7d | 1990 | if (bf->bf_tx_aborted) |
e8324357 | 1991 | return 0; |
f078f209 | 1992 | |
e8324357 S |
1993 | isaggr = bf_isaggr(bf); |
1994 | if (isaggr) { | |
db1a052b FF |
1995 | seq_st = ts->ts_seqnum; |
1996 | memcpy(ba, &ts->ba_low, WME_BA_BMP_SIZE >> 3); | |
e8324357 | 1997 | } |
f078f209 | 1998 | |
e8324357 S |
1999 | while (bf) { |
2000 | ba_index = ATH_BA_INDEX(seq_st, bf->bf_seqno); | |
2001 | if (!txok || (isaggr && !ATH_BA_ISSET(ba, ba_index))) | |
2002 | nbad++; | |
2003 | ||
2004 | bf = bf->bf_next; | |
2005 | } | |
f078f209 | 2006 | |
e8324357 S |
2007 | return nbad; |
2008 | } | |
f078f209 | 2009 | |
db1a052b | 2010 | static void ath_tx_rc_status(struct ath_buf *bf, struct ath_tx_status *ts, |
8a92e2ee | 2011 | int nbad, int txok, bool update_rc) |
f078f209 | 2012 | { |
a22be22a | 2013 | struct sk_buff *skb = bf->bf_mpdu; |
254ad0ff | 2014 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
e8324357 | 2015 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
827e69bf | 2016 | struct ieee80211_hw *hw = bf->aphy->hw; |
8a92e2ee | 2017 | u8 i, tx_rateindex; |
f078f209 | 2018 | |
95e4acb7 | 2019 | if (txok) |
db1a052b | 2020 | tx_info->status.ack_signal = ts->ts_rssi; |
95e4acb7 | 2021 | |
db1a052b | 2022 | tx_rateindex = ts->ts_rateindex; |
8a92e2ee VT |
2023 | WARN_ON(tx_rateindex >= hw->max_rates); |
2024 | ||
db1a052b | 2025 | if (ts->ts_status & ATH9K_TXERR_FILT) |
e8324357 | 2026 | tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED; |
d969847c FF |
2027 | if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && update_rc) |
2028 | tx_info->flags |= IEEE80211_TX_STAT_AMPDU; | |
f078f209 | 2029 | |
db1a052b | 2030 | if ((ts->ts_status & ATH9K_TXERR_FILT) == 0 && |
8a92e2ee | 2031 | (bf->bf_flags & ATH9K_TXDESC_NOACK) == 0 && update_rc) { |
254ad0ff | 2032 | if (ieee80211_is_data(hdr->frame_control)) { |
db1a052b | 2033 | if (ts->ts_flags & |
827e69bf FF |
2034 | (ATH9K_TX_DATA_UNDERRUN | ATH9K_TX_DELIM_UNDERRUN)) |
2035 | tx_info->pad[0] |= ATH_TX_INFO_UNDERRUN; | |
db1a052b FF |
2036 | if ((ts->ts_status & ATH9K_TXERR_XRETRY) || |
2037 | (ts->ts_status & ATH9K_TXERR_FIFO)) | |
827e69bf FF |
2038 | tx_info->pad[0] |= ATH_TX_INFO_XRETRY; |
2039 | tx_info->status.ampdu_len = bf->bf_nframes; | |
2040 | tx_info->status.ampdu_ack_len = bf->bf_nframes - nbad; | |
e8324357 | 2041 | } |
f078f209 | 2042 | } |
8a92e2ee | 2043 | |
545750d3 | 2044 | for (i = tx_rateindex + 1; i < hw->max_rates; i++) { |
8a92e2ee | 2045 | tx_info->status.rates[i].count = 0; |
545750d3 FF |
2046 | tx_info->status.rates[i].idx = -1; |
2047 | } | |
8a92e2ee VT |
2048 | |
2049 | tx_info->status.rates[tx_rateindex].count = bf->bf_retries + 1; | |
f078f209 LR |
2050 | } |
2051 | ||
059d806c S |
2052 | static void ath_wake_mac80211_queue(struct ath_softc *sc, struct ath_txq *txq) |
2053 | { | |
2054 | int qnum; | |
2055 | ||
2056 | spin_lock_bh(&txq->axq_lock); | |
2057 | if (txq->stopped && | |
f7a99e46 | 2058 | sc->tx.txq[txq->axq_qnum].axq_depth <= (ATH_TXBUF - 20)) { |
059d806c S |
2059 | qnum = ath_get_mac80211_qnum(txq->axq_qnum, sc); |
2060 | if (qnum != -1) { | |
f52de03b | 2061 | ath_mac80211_start_queue(sc, qnum); |
059d806c S |
2062 | txq->stopped = 0; |
2063 | } | |
2064 | } | |
2065 | spin_unlock_bh(&txq->axq_lock); | |
2066 | } | |
2067 | ||
e8324357 | 2068 | static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq) |
f078f209 | 2069 | { |
cbe61d8a | 2070 | struct ath_hw *ah = sc->sc_ah; |
c46917bb | 2071 | struct ath_common *common = ath9k_hw_common(ah); |
e8324357 | 2072 | struct ath_buf *bf, *lastbf, *bf_held = NULL; |
f078f209 | 2073 | struct list_head bf_head; |
e8324357 | 2074 | struct ath_desc *ds; |
29bffa96 | 2075 | struct ath_tx_status ts; |
0934af23 | 2076 | int txok; |
e8324357 | 2077 | int status; |
f078f209 | 2078 | |
c46917bb LR |
2079 | ath_print(common, ATH_DBG_QUEUE, "tx queue %d (%x), link %p\n", |
2080 | txq->axq_qnum, ath9k_hw_gettxbuf(sc->sc_ah, txq->axq_qnum), | |
2081 | txq->axq_link); | |
f078f209 | 2082 | |
f078f209 LR |
2083 | for (;;) { |
2084 | spin_lock_bh(&txq->axq_lock); | |
f078f209 LR |
2085 | if (list_empty(&txq->axq_q)) { |
2086 | txq->axq_link = NULL; | |
f078f209 LR |
2087 | spin_unlock_bh(&txq->axq_lock); |
2088 | break; | |
2089 | } | |
f078f209 LR |
2090 | bf = list_first_entry(&txq->axq_q, struct ath_buf, list); |
2091 | ||
e8324357 S |
2092 | /* |
2093 | * There is a race condition that a BH gets scheduled | |
2094 | * after sw writes TxE and before hw re-load the last | |
2095 | * descriptor to get the newly chained one. | |
2096 | * Software must keep the last DONE descriptor as a | |
2097 | * holding descriptor - software does so by marking | |
2098 | * it with the STALE flag. | |
2099 | */ | |
2100 | bf_held = NULL; | |
a119cc49 | 2101 | if (bf->bf_stale) { |
e8324357 S |
2102 | bf_held = bf; |
2103 | if (list_is_last(&bf_held->list, &txq->axq_q)) { | |
6ef9b13d | 2104 | spin_unlock_bh(&txq->axq_lock); |
e8324357 S |
2105 | break; |
2106 | } else { | |
2107 | bf = list_entry(bf_held->list.next, | |
6ef9b13d | 2108 | struct ath_buf, list); |
e8324357 | 2109 | } |
f078f209 LR |
2110 | } |
2111 | ||
2112 | lastbf = bf->bf_lastbf; | |
e8324357 | 2113 | ds = lastbf->bf_desc; |
f078f209 | 2114 | |
29bffa96 FF |
2115 | memset(&ts, 0, sizeof(ts)); |
2116 | status = ath9k_hw_txprocdesc(ah, ds, &ts); | |
e8324357 | 2117 | if (status == -EINPROGRESS) { |
f078f209 | 2118 | spin_unlock_bh(&txq->axq_lock); |
e8324357 | 2119 | break; |
f078f209 | 2120 | } |
f078f209 | 2121 | |
e7824a50 LR |
2122 | /* |
2123 | * We now know the nullfunc frame has been ACKed so we | |
2124 | * can disable RX. | |
2125 | */ | |
2126 | if (bf->bf_isnullfunc && | |
29bffa96 | 2127 | (ts.ts_status & ATH9K_TX_ACKED)) { |
3f7c5c10 SB |
2128 | if ((sc->ps_flags & PS_ENABLED)) |
2129 | ath9k_enable_ps(sc); | |
2130 | else | |
1b04b930 | 2131 | sc->ps_flags |= PS_NULLFUNC_COMPLETED; |
e7824a50 LR |
2132 | } |
2133 | ||
e8324357 S |
2134 | /* |
2135 | * Remove ath_buf's of the same transmit unit from txq, | |
2136 | * however leave the last descriptor back as the holding | |
2137 | * descriptor for hw. | |
2138 | */ | |
a119cc49 | 2139 | lastbf->bf_stale = true; |
e8324357 | 2140 | INIT_LIST_HEAD(&bf_head); |
e8324357 S |
2141 | if (!list_is_singular(&lastbf->list)) |
2142 | list_cut_position(&bf_head, | |
2143 | &txq->axq_q, lastbf->list.prev); | |
f078f209 | 2144 | |
e8324357 | 2145 | txq->axq_depth--; |
29bffa96 | 2146 | txok = !(ts.ts_status & ATH9K_TXERR_MASK); |
164ace38 | 2147 | txq->axq_tx_inprogress = false; |
0a8cea84 FF |
2148 | if (bf_held) |
2149 | list_del(&bf_held->list); | |
e8324357 | 2150 | spin_unlock_bh(&txq->axq_lock); |
f078f209 | 2151 | |
0a8cea84 FF |
2152 | if (bf_held) |
2153 | ath_tx_return_buffer(sc, bf_held); | |
f078f209 | 2154 | |
e8324357 S |
2155 | if (!bf_isampdu(bf)) { |
2156 | /* | |
2157 | * This frame is sent out as a single frame. | |
2158 | * Use hardware retry status for this frame. | |
2159 | */ | |
29bffa96 FF |
2160 | bf->bf_retries = ts.ts_longretry; |
2161 | if (ts.ts_status & ATH9K_TXERR_XRETRY) | |
e8324357 | 2162 | bf->bf_state.bf_type |= BUF_XRETRY; |
29bffa96 | 2163 | ath_tx_rc_status(bf, &ts, 0, txok, true); |
e8324357 | 2164 | } |
f078f209 | 2165 | |
e8324357 | 2166 | if (bf_isampdu(bf)) |
29bffa96 | 2167 | ath_tx_complete_aggr(sc, txq, bf, &bf_head, &ts, txok); |
e8324357 | 2168 | else |
29bffa96 | 2169 | ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, txok, 0); |
8469cdef | 2170 | |
059d806c | 2171 | ath_wake_mac80211_queue(sc, txq); |
8469cdef | 2172 | |
059d806c | 2173 | spin_lock_bh(&txq->axq_lock); |
e8324357 S |
2174 | if (sc->sc_flags & SC_OP_TXAGGR) |
2175 | ath_txq_schedule(sc, txq); | |
2176 | spin_unlock_bh(&txq->axq_lock); | |
8469cdef S |
2177 | } |
2178 | } | |
2179 | ||
305fe47f | 2180 | static void ath_tx_complete_poll_work(struct work_struct *work) |
164ace38 SB |
2181 | { |
2182 | struct ath_softc *sc = container_of(work, struct ath_softc, | |
2183 | tx_complete_work.work); | |
2184 | struct ath_txq *txq; | |
2185 | int i; | |
2186 | bool needreset = false; | |
2187 | ||
2188 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) | |
2189 | if (ATH_TXQ_SETUP(sc, i)) { | |
2190 | txq = &sc->tx.txq[i]; | |
2191 | spin_lock_bh(&txq->axq_lock); | |
2192 | if (txq->axq_depth) { | |
2193 | if (txq->axq_tx_inprogress) { | |
2194 | needreset = true; | |
2195 | spin_unlock_bh(&txq->axq_lock); | |
2196 | break; | |
2197 | } else { | |
2198 | txq->axq_tx_inprogress = true; | |
2199 | } | |
2200 | } | |
2201 | spin_unlock_bh(&txq->axq_lock); | |
2202 | } | |
2203 | ||
2204 | if (needreset) { | |
c46917bb LR |
2205 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_RESET, |
2206 | "tx hung, resetting the chip\n"); | |
332c5566 | 2207 | ath9k_ps_wakeup(sc); |
164ace38 | 2208 | ath_reset(sc, false); |
332c5566 | 2209 | ath9k_ps_restore(sc); |
164ace38 SB |
2210 | } |
2211 | ||
42935eca | 2212 | ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, |
164ace38 SB |
2213 | msecs_to_jiffies(ATH_TX_COMPLETE_POLL_INT)); |
2214 | } | |
2215 | ||
2216 | ||
f078f209 | 2217 | |
e8324357 | 2218 | void ath_tx_tasklet(struct ath_softc *sc) |
f078f209 | 2219 | { |
e8324357 S |
2220 | int i; |
2221 | u32 qcumask = ((1 << ATH9K_NUM_TX_QUEUES) - 1); | |
f078f209 | 2222 | |
e8324357 | 2223 | ath9k_hw_gettxintrtxqs(sc->sc_ah, &qcumask); |
f078f209 | 2224 | |
e8324357 S |
2225 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { |
2226 | if (ATH_TXQ_SETUP(sc, i) && (qcumask & (1 << i))) | |
2227 | ath_tx_processq(sc, &sc->tx.txq[i]); | |
f078f209 LR |
2228 | } |
2229 | } | |
2230 | ||
e5003249 VT |
2231 | void ath_tx_edma_tasklet(struct ath_softc *sc) |
2232 | { | |
2233 | struct ath_tx_status txs; | |
2234 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
2235 | struct ath_hw *ah = sc->sc_ah; | |
2236 | struct ath_txq *txq; | |
2237 | struct ath_buf *bf, *lastbf; | |
2238 | struct list_head bf_head; | |
2239 | int status; | |
2240 | int txok; | |
2241 | ||
2242 | for (;;) { | |
2243 | status = ath9k_hw_txprocdesc(ah, NULL, (void *)&txs); | |
2244 | if (status == -EINPROGRESS) | |
2245 | break; | |
2246 | if (status == -EIO) { | |
2247 | ath_print(common, ATH_DBG_XMIT, | |
2248 | "Error processing tx status\n"); | |
2249 | break; | |
2250 | } | |
2251 | ||
2252 | /* Skip beacon completions */ | |
2253 | if (txs.qid == sc->beacon.beaconq) | |
2254 | continue; | |
2255 | ||
2256 | txq = &sc->tx.txq[txs.qid]; | |
2257 | ||
2258 | spin_lock_bh(&txq->axq_lock); | |
2259 | if (list_empty(&txq->txq_fifo[txq->txq_tailidx])) { | |
2260 | spin_unlock_bh(&txq->axq_lock); | |
2261 | return; | |
2262 | } | |
2263 | ||
2264 | bf = list_first_entry(&txq->txq_fifo[txq->txq_tailidx], | |
2265 | struct ath_buf, list); | |
2266 | lastbf = bf->bf_lastbf; | |
2267 | ||
2268 | INIT_LIST_HEAD(&bf_head); | |
2269 | list_cut_position(&bf_head, &txq->txq_fifo[txq->txq_tailidx], | |
2270 | &lastbf->list); | |
2271 | INCR(txq->txq_tailidx, ATH_TXFIFO_DEPTH); | |
2272 | txq->axq_depth--; | |
2273 | txq->axq_tx_inprogress = false; | |
2274 | spin_unlock_bh(&txq->axq_lock); | |
2275 | ||
2276 | txok = !(txs.ts_status & ATH9K_TXERR_MASK); | |
2277 | ||
2278 | if (!bf_isampdu(bf)) { | |
2279 | bf->bf_retries = txs.ts_longretry; | |
2280 | if (txs.ts_status & ATH9K_TXERR_XRETRY) | |
2281 | bf->bf_state.bf_type |= BUF_XRETRY; | |
2282 | ath_tx_rc_status(bf, &txs, 0, txok, true); | |
2283 | } | |
2284 | ||
2285 | if (bf_isampdu(bf)) | |
2286 | ath_tx_complete_aggr(sc, txq, bf, &bf_head, &txs, txok); | |
2287 | else | |
2288 | ath_tx_complete_buf(sc, bf, txq, &bf_head, | |
2289 | &txs, txok, 0); | |
2290 | ||
2291 | spin_lock_bh(&txq->axq_lock); | |
2292 | if (!list_empty(&txq->txq_fifo_pending)) { | |
2293 | INIT_LIST_HEAD(&bf_head); | |
2294 | bf = list_first_entry(&txq->txq_fifo_pending, | |
2295 | struct ath_buf, list); | |
2296 | list_cut_position(&bf_head, &txq->txq_fifo_pending, | |
2297 | &bf->bf_lastbf->list); | |
2298 | ath_tx_txqaddbuf(sc, txq, &bf_head); | |
2299 | } else if (sc->sc_flags & SC_OP_TXAGGR) | |
2300 | ath_txq_schedule(sc, txq); | |
2301 | spin_unlock_bh(&txq->axq_lock); | |
2302 | } | |
2303 | } | |
2304 | ||
e8324357 S |
2305 | /*****************/ |
2306 | /* Init, Cleanup */ | |
2307 | /*****************/ | |
f078f209 | 2308 | |
5088c2f1 VT |
2309 | static int ath_txstatus_setup(struct ath_softc *sc, int size) |
2310 | { | |
2311 | struct ath_descdma *dd = &sc->txsdma; | |
2312 | u8 txs_len = sc->sc_ah->caps.txs_len; | |
2313 | ||
2314 | dd->dd_desc_len = size * txs_len; | |
2315 | dd->dd_desc = dma_alloc_coherent(sc->dev, dd->dd_desc_len, | |
2316 | &dd->dd_desc_paddr, GFP_KERNEL); | |
2317 | if (!dd->dd_desc) | |
2318 | return -ENOMEM; | |
2319 | ||
2320 | return 0; | |
2321 | } | |
2322 | ||
2323 | static int ath_tx_edma_init(struct ath_softc *sc) | |
2324 | { | |
2325 | int err; | |
2326 | ||
2327 | err = ath_txstatus_setup(sc, ATH_TXSTATUS_RING_SIZE); | |
2328 | if (!err) | |
2329 | ath9k_hw_setup_statusring(sc->sc_ah, sc->txsdma.dd_desc, | |
2330 | sc->txsdma.dd_desc_paddr, | |
2331 | ATH_TXSTATUS_RING_SIZE); | |
2332 | ||
2333 | return err; | |
2334 | } | |
2335 | ||
2336 | static void ath_tx_edma_cleanup(struct ath_softc *sc) | |
2337 | { | |
2338 | struct ath_descdma *dd = &sc->txsdma; | |
2339 | ||
2340 | dma_free_coherent(sc->dev, dd->dd_desc_len, dd->dd_desc, | |
2341 | dd->dd_desc_paddr); | |
2342 | } | |
2343 | ||
e8324357 | 2344 | int ath_tx_init(struct ath_softc *sc, int nbufs) |
f078f209 | 2345 | { |
c46917bb | 2346 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
e8324357 | 2347 | int error = 0; |
f078f209 | 2348 | |
797fe5cb | 2349 | spin_lock_init(&sc->tx.txbuflock); |
f078f209 | 2350 | |
797fe5cb | 2351 | error = ath_descdma_setup(sc, &sc->tx.txdma, &sc->tx.txbuf, |
4adfcded | 2352 | "tx", nbufs, 1, 1); |
797fe5cb | 2353 | if (error != 0) { |
c46917bb LR |
2354 | ath_print(common, ATH_DBG_FATAL, |
2355 | "Failed to allocate tx descriptors: %d\n", error); | |
797fe5cb S |
2356 | goto err; |
2357 | } | |
f078f209 | 2358 | |
797fe5cb | 2359 | error = ath_descdma_setup(sc, &sc->beacon.bdma, &sc->beacon.bbuf, |
5088c2f1 | 2360 | "beacon", ATH_BCBUF, 1, 1); |
797fe5cb | 2361 | if (error != 0) { |
c46917bb LR |
2362 | ath_print(common, ATH_DBG_FATAL, |
2363 | "Failed to allocate beacon descriptors: %d\n", error); | |
797fe5cb S |
2364 | goto err; |
2365 | } | |
f078f209 | 2366 | |
164ace38 SB |
2367 | INIT_DELAYED_WORK(&sc->tx_complete_work, ath_tx_complete_poll_work); |
2368 | ||
5088c2f1 VT |
2369 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
2370 | error = ath_tx_edma_init(sc); | |
2371 | if (error) | |
2372 | goto err; | |
2373 | } | |
2374 | ||
797fe5cb | 2375 | err: |
e8324357 S |
2376 | if (error != 0) |
2377 | ath_tx_cleanup(sc); | |
f078f209 | 2378 | |
e8324357 | 2379 | return error; |
f078f209 LR |
2380 | } |
2381 | ||
797fe5cb | 2382 | void ath_tx_cleanup(struct ath_softc *sc) |
e8324357 S |
2383 | { |
2384 | if (sc->beacon.bdma.dd_desc_len != 0) | |
2385 | ath_descdma_cleanup(sc, &sc->beacon.bdma, &sc->beacon.bbuf); | |
2386 | ||
2387 | if (sc->tx.txdma.dd_desc_len != 0) | |
2388 | ath_descdma_cleanup(sc, &sc->tx.txdma, &sc->tx.txbuf); | |
5088c2f1 VT |
2389 | |
2390 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) | |
2391 | ath_tx_edma_cleanup(sc); | |
e8324357 | 2392 | } |
f078f209 LR |
2393 | |
2394 | void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an) | |
2395 | { | |
c5170163 S |
2396 | struct ath_atx_tid *tid; |
2397 | struct ath_atx_ac *ac; | |
2398 | int tidno, acno; | |
f078f209 | 2399 | |
8ee5afbc | 2400 | for (tidno = 0, tid = &an->tid[tidno]; |
c5170163 S |
2401 | tidno < WME_NUM_TID; |
2402 | tidno++, tid++) { | |
2403 | tid->an = an; | |
2404 | tid->tidno = tidno; | |
2405 | tid->seq_start = tid->seq_next = 0; | |
2406 | tid->baw_size = WME_MAX_BA; | |
2407 | tid->baw_head = tid->baw_tail = 0; | |
2408 | tid->sched = false; | |
e8324357 | 2409 | tid->paused = false; |
a37c2c79 | 2410 | tid->state &= ~AGGR_CLEANUP; |
c5170163 | 2411 | INIT_LIST_HEAD(&tid->buf_q); |
c5170163 | 2412 | acno = TID_TO_WME_AC(tidno); |
8ee5afbc | 2413 | tid->ac = &an->ac[acno]; |
a37c2c79 S |
2414 | tid->state &= ~AGGR_ADDBA_COMPLETE; |
2415 | tid->state &= ~AGGR_ADDBA_PROGRESS; | |
c5170163 | 2416 | } |
f078f209 | 2417 | |
8ee5afbc | 2418 | for (acno = 0, ac = &an->ac[acno]; |
c5170163 S |
2419 | acno < WME_NUM_AC; acno++, ac++) { |
2420 | ac->sched = false; | |
2421 | INIT_LIST_HEAD(&ac->tid_q); | |
2422 | ||
2423 | switch (acno) { | |
2424 | case WME_AC_BE: | |
2425 | ac->qnum = ath_tx_get_qnum(sc, | |
2426 | ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_BE); | |
2427 | break; | |
2428 | case WME_AC_BK: | |
2429 | ac->qnum = ath_tx_get_qnum(sc, | |
2430 | ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_BK); | |
2431 | break; | |
2432 | case WME_AC_VI: | |
2433 | ac->qnum = ath_tx_get_qnum(sc, | |
2434 | ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_VI); | |
2435 | break; | |
2436 | case WME_AC_VO: | |
2437 | ac->qnum = ath_tx_get_qnum(sc, | |
2438 | ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_VO); | |
2439 | break; | |
f078f209 LR |
2440 | } |
2441 | } | |
2442 | } | |
2443 | ||
b5aa9bf9 | 2444 | void ath_tx_node_cleanup(struct ath_softc *sc, struct ath_node *an) |
f078f209 LR |
2445 | { |
2446 | int i; | |
2447 | struct ath_atx_ac *ac, *ac_tmp; | |
2448 | struct ath_atx_tid *tid, *tid_tmp; | |
2449 | struct ath_txq *txq; | |
e8324357 | 2450 | |
f078f209 LR |
2451 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { |
2452 | if (ATH_TXQ_SETUP(sc, i)) { | |
b77f483f | 2453 | txq = &sc->tx.txq[i]; |
f078f209 | 2454 | |
a9f042cb | 2455 | spin_lock_bh(&txq->axq_lock); |
f078f209 LR |
2456 | |
2457 | list_for_each_entry_safe(ac, | |
2458 | ac_tmp, &txq->axq_acq, list) { | |
2459 | tid = list_first_entry(&ac->tid_q, | |
2460 | struct ath_atx_tid, list); | |
2461 | if (tid && tid->an != an) | |
2462 | continue; | |
2463 | list_del(&ac->list); | |
2464 | ac->sched = false; | |
2465 | ||
2466 | list_for_each_entry_safe(tid, | |
2467 | tid_tmp, &ac->tid_q, list) { | |
2468 | list_del(&tid->list); | |
2469 | tid->sched = false; | |
b5aa9bf9 | 2470 | ath_tid_drain(sc, txq, tid); |
a37c2c79 | 2471 | tid->state &= ~AGGR_ADDBA_COMPLETE; |
a37c2c79 | 2472 | tid->state &= ~AGGR_CLEANUP; |
f078f209 LR |
2473 | } |
2474 | } | |
2475 | ||
a9f042cb | 2476 | spin_unlock_bh(&txq->axq_lock); |
f078f209 LR |
2477 | } |
2478 | } | |
2479 | } |