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Commit | Line | Data |
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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); |
90fa539c FF |
64 | static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid, |
65 | int seqno); | |
c4288390 | 66 | |
545750d3 | 67 | enum { |
0e668cde FF |
68 | MCS_HT20, |
69 | MCS_HT20_SGI, | |
545750d3 FF |
70 | MCS_HT40, |
71 | MCS_HT40_SGI, | |
72 | }; | |
73 | ||
0e668cde FF |
74 | static int ath_max_4ms_framelen[4][32] = { |
75 | [MCS_HT20] = { | |
76 | 3212, 6432, 9648, 12864, 19300, 25736, 28952, 32172, | |
77 | 6424, 12852, 19280, 25708, 38568, 51424, 57852, 64280, | |
78 | 9628, 19260, 28896, 38528, 57792, 65532, 65532, 65532, | |
79 | 12828, 25656, 38488, 51320, 65532, 65532, 65532, 65532, | |
80 | }, | |
81 | [MCS_HT20_SGI] = { | |
82 | 3572, 7144, 10720, 14296, 21444, 28596, 32172, 35744, | |
83 | 7140, 14284, 21428, 28568, 42856, 57144, 64288, 65532, | |
84 | 10700, 21408, 32112, 42816, 64228, 65532, 65532, 65532, | |
85 | 14256, 28516, 42780, 57040, 65532, 65532, 65532, 65532, | |
545750d3 FF |
86 | }, |
87 | [MCS_HT40] = { | |
0e668cde FF |
88 | 6680, 13360, 20044, 26724, 40092, 53456, 60140, 65532, |
89 | 13348, 26700, 40052, 53400, 65532, 65532, 65532, 65532, | |
90 | 20004, 40008, 60016, 65532, 65532, 65532, 65532, 65532, | |
91 | 26644, 53292, 65532, 65532, 65532, 65532, 65532, 65532, | |
545750d3 FF |
92 | }, |
93 | [MCS_HT40_SGI] = { | |
0e668cde FF |
94 | 7420, 14844, 22272, 29696, 44544, 59396, 65532, 65532, |
95 | 14832, 29668, 44504, 59340, 65532, 65532, 65532, 65532, | |
96 | 22232, 44464, 65532, 65532, 65532, 65532, 65532, 65532, | |
97 | 29616, 59232, 65532, 65532, 65532, 65532, 65532, 65532, | |
545750d3 FF |
98 | } |
99 | }; | |
100 | ||
e8324357 S |
101 | /*********************/ |
102 | /* Aggregation logic */ | |
103 | /*********************/ | |
f078f209 | 104 | |
e8324357 | 105 | static void ath_tx_queue_tid(struct ath_txq *txq, struct ath_atx_tid *tid) |
ff37e337 | 106 | { |
e8324357 | 107 | struct ath_atx_ac *ac = tid->ac; |
ff37e337 | 108 | |
e8324357 S |
109 | if (tid->paused) |
110 | return; | |
ff37e337 | 111 | |
e8324357 S |
112 | if (tid->sched) |
113 | return; | |
ff37e337 | 114 | |
e8324357 S |
115 | tid->sched = true; |
116 | list_add_tail(&tid->list, &ac->tid_q); | |
528f0c6b | 117 | |
e8324357 S |
118 | if (ac->sched) |
119 | return; | |
f078f209 | 120 | |
e8324357 S |
121 | ac->sched = true; |
122 | list_add_tail(&ac->list, &txq->axq_acq); | |
123 | } | |
f078f209 | 124 | |
e8324357 | 125 | static void ath_tx_resume_tid(struct ath_softc *sc, struct ath_atx_tid *tid) |
f078f209 | 126 | { |
e8324357 | 127 | struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum]; |
e6a9854b | 128 | |
75401849 | 129 | WARN_ON(!tid->paused); |
f078f209 | 130 | |
75401849 LB |
131 | spin_lock_bh(&txq->axq_lock); |
132 | tid->paused = false; | |
f078f209 | 133 | |
e8324357 S |
134 | if (list_empty(&tid->buf_q)) |
135 | goto unlock; | |
f078f209 | 136 | |
e8324357 S |
137 | ath_tx_queue_tid(txq, tid); |
138 | ath_txq_schedule(sc, txq); | |
139 | unlock: | |
140 | spin_unlock_bh(&txq->axq_lock); | |
528f0c6b | 141 | } |
f078f209 | 142 | |
e8324357 | 143 | static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid) |
528f0c6b | 144 | { |
e8324357 S |
145 | struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum]; |
146 | struct ath_buf *bf; | |
147 | struct list_head bf_head; | |
90fa539c | 148 | struct ath_tx_status ts; |
f078f209 | 149 | |
90fa539c | 150 | INIT_LIST_HEAD(&bf_head); |
e6a9854b | 151 | |
90fa539c | 152 | memset(&ts, 0, sizeof(ts)); |
75401849 | 153 | spin_lock_bh(&txq->axq_lock); |
f078f209 | 154 | |
e8324357 S |
155 | while (!list_empty(&tid->buf_q)) { |
156 | bf = list_first_entry(&tid->buf_q, struct ath_buf, list); | |
d43f3015 | 157 | list_move_tail(&bf->list, &bf_head); |
90fa539c FF |
158 | |
159 | if (bf_isretried(bf)) { | |
160 | ath_tx_update_baw(sc, tid, bf->bf_seqno); | |
161 | ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 0); | |
162 | } else { | |
163 | ath_tx_send_ht_normal(sc, txq, tid, &bf_head); | |
164 | } | |
528f0c6b | 165 | } |
f078f209 | 166 | |
e8324357 | 167 | spin_unlock_bh(&txq->axq_lock); |
528f0c6b | 168 | } |
f078f209 | 169 | |
e8324357 S |
170 | static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid, |
171 | int seqno) | |
528f0c6b | 172 | { |
e8324357 | 173 | int index, cindex; |
f078f209 | 174 | |
e8324357 S |
175 | index = ATH_BA_INDEX(tid->seq_start, seqno); |
176 | cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); | |
f078f209 | 177 | |
81ee13ba | 178 | __clear_bit(cindex, tid->tx_buf); |
528f0c6b | 179 | |
81ee13ba | 180 | while (tid->baw_head != tid->baw_tail && !test_bit(tid->baw_head, tid->tx_buf)) { |
e8324357 S |
181 | INCR(tid->seq_start, IEEE80211_SEQ_MAX); |
182 | INCR(tid->baw_head, ATH_TID_MAX_BUFS); | |
183 | } | |
528f0c6b | 184 | } |
f078f209 | 185 | |
e8324357 S |
186 | static void ath_tx_addto_baw(struct ath_softc *sc, struct ath_atx_tid *tid, |
187 | struct ath_buf *bf) | |
528f0c6b | 188 | { |
e8324357 | 189 | int index, cindex; |
528f0c6b | 190 | |
e8324357 S |
191 | if (bf_isretried(bf)) |
192 | return; | |
528f0c6b | 193 | |
e8324357 S |
194 | index = ATH_BA_INDEX(tid->seq_start, bf->bf_seqno); |
195 | cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); | |
81ee13ba | 196 | __set_bit(cindex, tid->tx_buf); |
f078f209 | 197 | |
e8324357 S |
198 | if (index >= ((tid->baw_tail - tid->baw_head) & |
199 | (ATH_TID_MAX_BUFS - 1))) { | |
200 | tid->baw_tail = cindex; | |
201 | INCR(tid->baw_tail, ATH_TID_MAX_BUFS); | |
f078f209 | 202 | } |
f078f209 LR |
203 | } |
204 | ||
205 | /* | |
e8324357 S |
206 | * TODO: For frame(s) that are in the retry state, we will reuse the |
207 | * sequence number(s) without setting the retry bit. The | |
208 | * alternative is to give up on these and BAR the receiver's window | |
209 | * forward. | |
f078f209 | 210 | */ |
e8324357 S |
211 | static void ath_tid_drain(struct ath_softc *sc, struct ath_txq *txq, |
212 | struct ath_atx_tid *tid) | |
f078f209 | 213 | |
f078f209 | 214 | { |
e8324357 S |
215 | struct ath_buf *bf; |
216 | struct list_head bf_head; | |
db1a052b FF |
217 | struct ath_tx_status ts; |
218 | ||
219 | memset(&ts, 0, sizeof(ts)); | |
e8324357 | 220 | INIT_LIST_HEAD(&bf_head); |
f078f209 | 221 | |
e8324357 S |
222 | for (;;) { |
223 | if (list_empty(&tid->buf_q)) | |
224 | break; | |
f078f209 | 225 | |
d43f3015 S |
226 | bf = list_first_entry(&tid->buf_q, struct ath_buf, list); |
227 | list_move_tail(&bf->list, &bf_head); | |
f078f209 | 228 | |
e8324357 S |
229 | if (bf_isretried(bf)) |
230 | ath_tx_update_baw(sc, tid, bf->bf_seqno); | |
f078f209 | 231 | |
e8324357 | 232 | spin_unlock(&txq->axq_lock); |
db1a052b | 233 | ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 0); |
e8324357 S |
234 | spin_lock(&txq->axq_lock); |
235 | } | |
f078f209 | 236 | |
e8324357 S |
237 | tid->seq_next = tid->seq_start; |
238 | tid->baw_tail = tid->baw_head; | |
f078f209 LR |
239 | } |
240 | ||
fec247c0 S |
241 | static void ath_tx_set_retry(struct ath_softc *sc, struct ath_txq *txq, |
242 | struct ath_buf *bf) | |
f078f209 | 243 | { |
e8324357 S |
244 | struct sk_buff *skb; |
245 | struct ieee80211_hdr *hdr; | |
f078f209 | 246 | |
e8324357 S |
247 | bf->bf_state.bf_type |= BUF_RETRY; |
248 | bf->bf_retries++; | |
fec247c0 | 249 | TX_STAT_INC(txq->axq_qnum, a_retries); |
f078f209 | 250 | |
e8324357 S |
251 | skb = bf->bf_mpdu; |
252 | hdr = (struct ieee80211_hdr *)skb->data; | |
253 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_RETRY); | |
f078f209 LR |
254 | } |
255 | ||
0a8cea84 | 256 | static struct ath_buf *ath_tx_get_buffer(struct ath_softc *sc) |
d43f3015 | 257 | { |
0a8cea84 | 258 | struct ath_buf *bf = NULL; |
d43f3015 S |
259 | |
260 | spin_lock_bh(&sc->tx.txbuflock); | |
0a8cea84 FF |
261 | |
262 | if (unlikely(list_empty(&sc->tx.txbuf))) { | |
8a46097a VT |
263 | spin_unlock_bh(&sc->tx.txbuflock); |
264 | return NULL; | |
265 | } | |
0a8cea84 FF |
266 | |
267 | bf = list_first_entry(&sc->tx.txbuf, struct ath_buf, list); | |
268 | list_del(&bf->list); | |
269 | ||
d43f3015 S |
270 | spin_unlock_bh(&sc->tx.txbuflock); |
271 | ||
0a8cea84 FF |
272 | return bf; |
273 | } | |
274 | ||
275 | static void ath_tx_return_buffer(struct ath_softc *sc, struct ath_buf *bf) | |
276 | { | |
277 | spin_lock_bh(&sc->tx.txbuflock); | |
278 | list_add_tail(&bf->list, &sc->tx.txbuf); | |
279 | spin_unlock_bh(&sc->tx.txbuflock); | |
280 | } | |
281 | ||
282 | static struct ath_buf* ath_clone_txbuf(struct ath_softc *sc, struct ath_buf *bf) | |
283 | { | |
284 | struct ath_buf *tbf; | |
285 | ||
286 | tbf = ath_tx_get_buffer(sc); | |
287 | if (WARN_ON(!tbf)) | |
288 | return NULL; | |
289 | ||
d43f3015 S |
290 | ATH_TXBUF_RESET(tbf); |
291 | ||
827e69bf | 292 | tbf->aphy = bf->aphy; |
d43f3015 S |
293 | tbf->bf_mpdu = bf->bf_mpdu; |
294 | tbf->bf_buf_addr = bf->bf_buf_addr; | |
d826c832 | 295 | memcpy(tbf->bf_desc, bf->bf_desc, sc->sc_ah->caps.tx_desc_len); |
d43f3015 | 296 | tbf->bf_state = bf->bf_state; |
d43f3015 S |
297 | |
298 | return tbf; | |
299 | } | |
300 | ||
301 | static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq, | |
302 | struct ath_buf *bf, struct list_head *bf_q, | |
db1a052b | 303 | struct ath_tx_status *ts, int txok) |
f078f209 | 304 | { |
e8324357 S |
305 | struct ath_node *an = NULL; |
306 | struct sk_buff *skb; | |
1286ec6d | 307 | struct ieee80211_sta *sta; |
76d5a9e8 | 308 | struct ieee80211_hw *hw; |
1286ec6d | 309 | struct ieee80211_hdr *hdr; |
76d5a9e8 | 310 | struct ieee80211_tx_info *tx_info; |
e8324357 | 311 | struct ath_atx_tid *tid = NULL; |
d43f3015 | 312 | struct ath_buf *bf_next, *bf_last = bf->bf_lastbf; |
e8324357 | 313 | struct list_head bf_head, bf_pending; |
0934af23 | 314 | u16 seq_st = 0, acked_cnt = 0, txfail_cnt = 0; |
f078f209 | 315 | u32 ba[WME_BA_BMP_SIZE >> 5]; |
0934af23 VT |
316 | int isaggr, txfail, txpending, sendbar = 0, needreset = 0, nbad = 0; |
317 | bool rc_update = true; | |
78c4653a | 318 | struct ieee80211_tx_rate rates[4]; |
ebd02287 | 319 | int nframes; |
f078f209 | 320 | |
a22be22a | 321 | skb = bf->bf_mpdu; |
1286ec6d S |
322 | hdr = (struct ieee80211_hdr *)skb->data; |
323 | ||
76d5a9e8 | 324 | tx_info = IEEE80211_SKB_CB(skb); |
827e69bf | 325 | hw = bf->aphy->hw; |
76d5a9e8 | 326 | |
78c4653a | 327 | memcpy(rates, tx_info->control.rates, sizeof(rates)); |
ebd02287 | 328 | nframes = bf->bf_nframes; |
78c4653a | 329 | |
1286ec6d | 330 | rcu_read_lock(); |
f078f209 | 331 | |
686b9cb9 | 332 | sta = ieee80211_find_sta_by_ifaddr(hw, hdr->addr1, hdr->addr2); |
1286ec6d S |
333 | if (!sta) { |
334 | rcu_read_unlock(); | |
73e19463 | 335 | |
31e79a59 FF |
336 | INIT_LIST_HEAD(&bf_head); |
337 | while (bf) { | |
338 | bf_next = bf->bf_next; | |
339 | ||
340 | bf->bf_state.bf_type |= BUF_XRETRY; | |
341 | if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) || | |
342 | !bf->bf_stale || bf_next != NULL) | |
343 | list_move_tail(&bf->list, &bf_head); | |
344 | ||
ebd02287 | 345 | ath_tx_rc_status(bf, ts, 1, 0, false); |
31e79a59 FF |
346 | ath_tx_complete_buf(sc, bf, txq, &bf_head, ts, |
347 | 0, 0); | |
348 | ||
349 | bf = bf_next; | |
350 | } | |
1286ec6d | 351 | return; |
f078f209 LR |
352 | } |
353 | ||
1286ec6d S |
354 | an = (struct ath_node *)sta->drv_priv; |
355 | tid = ATH_AN_2_TID(an, bf->bf_tidno); | |
356 | ||
b11b160d FF |
357 | /* |
358 | * The hardware occasionally sends a tx status for the wrong TID. | |
359 | * In this case, the BA status cannot be considered valid and all | |
360 | * subframes need to be retransmitted | |
361 | */ | |
362 | if (bf->bf_tidno != ts->tid) | |
363 | txok = false; | |
364 | ||
e8324357 | 365 | isaggr = bf_isaggr(bf); |
d43f3015 | 366 | memset(ba, 0, WME_BA_BMP_SIZE >> 3); |
f078f209 | 367 | |
d43f3015 | 368 | if (isaggr && txok) { |
db1a052b FF |
369 | if (ts->ts_flags & ATH9K_TX_BA) { |
370 | seq_st = ts->ts_seqnum; | |
371 | memcpy(ba, &ts->ba_low, WME_BA_BMP_SIZE >> 3); | |
e8324357 | 372 | } else { |
d43f3015 S |
373 | /* |
374 | * AR5416 can become deaf/mute when BA | |
375 | * issue happens. Chip needs to be reset. | |
376 | * But AP code may have sychronization issues | |
377 | * when perform internal reset in this routine. | |
378 | * Only enable reset in STA mode for now. | |
379 | */ | |
2660b81a | 380 | if (sc->sc_ah->opmode == NL80211_IFTYPE_STATION) |
d43f3015 | 381 | needreset = 1; |
e8324357 | 382 | } |
f078f209 LR |
383 | } |
384 | ||
e8324357 S |
385 | INIT_LIST_HEAD(&bf_pending); |
386 | INIT_LIST_HEAD(&bf_head); | |
f078f209 | 387 | |
db1a052b | 388 | nbad = ath_tx_num_badfrms(sc, bf, ts, txok); |
e8324357 S |
389 | while (bf) { |
390 | txfail = txpending = 0; | |
391 | bf_next = bf->bf_next; | |
f078f209 | 392 | |
78c4653a FF |
393 | skb = bf->bf_mpdu; |
394 | tx_info = IEEE80211_SKB_CB(skb); | |
395 | ||
e8324357 S |
396 | if (ATH_BA_ISSET(ba, ATH_BA_INDEX(seq_st, bf->bf_seqno))) { |
397 | /* transmit completion, subframe is | |
398 | * acked by block ack */ | |
0934af23 | 399 | acked_cnt++; |
e8324357 S |
400 | } else if (!isaggr && txok) { |
401 | /* transmit completion */ | |
0934af23 | 402 | acked_cnt++; |
e8324357 | 403 | } else { |
e8324357 | 404 | if (!(tid->state & AGGR_CLEANUP) && |
6d913f7d | 405 | !bf_last->bf_tx_aborted) { |
e8324357 | 406 | if (bf->bf_retries < ATH_MAX_SW_RETRIES) { |
fec247c0 | 407 | ath_tx_set_retry(sc, txq, bf); |
e8324357 S |
408 | txpending = 1; |
409 | } else { | |
410 | bf->bf_state.bf_type |= BUF_XRETRY; | |
411 | txfail = 1; | |
412 | sendbar = 1; | |
0934af23 | 413 | txfail_cnt++; |
e8324357 S |
414 | } |
415 | } else { | |
416 | /* | |
417 | * cleanup in progress, just fail | |
418 | * the un-acked sub-frames | |
419 | */ | |
420 | txfail = 1; | |
421 | } | |
422 | } | |
f078f209 | 423 | |
e5003249 VT |
424 | if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) && |
425 | bf_next == NULL) { | |
cbfe89c6 VT |
426 | /* |
427 | * Make sure the last desc is reclaimed if it | |
428 | * not a holding desc. | |
429 | */ | |
430 | if (!bf_last->bf_stale) | |
431 | list_move_tail(&bf->list, &bf_head); | |
432 | else | |
433 | INIT_LIST_HEAD(&bf_head); | |
e8324357 | 434 | } else { |
9680e8a3 | 435 | BUG_ON(list_empty(bf_q)); |
d43f3015 | 436 | list_move_tail(&bf->list, &bf_head); |
e8324357 | 437 | } |
f078f209 | 438 | |
90fa539c | 439 | if (!txpending || (tid->state & AGGR_CLEANUP)) { |
e8324357 S |
440 | /* |
441 | * complete the acked-ones/xretried ones; update | |
442 | * block-ack window | |
443 | */ | |
444 | spin_lock_bh(&txq->axq_lock); | |
445 | ath_tx_update_baw(sc, tid, bf->bf_seqno); | |
446 | spin_unlock_bh(&txq->axq_lock); | |
f078f209 | 447 | |
8a92e2ee | 448 | if (rc_update && (acked_cnt == 1 || txfail_cnt == 1)) { |
78c4653a | 449 | memcpy(tx_info->control.rates, rates, sizeof(rates)); |
ebd02287 | 450 | bf->bf_nframes = nframes; |
db1a052b | 451 | ath_tx_rc_status(bf, ts, nbad, txok, true); |
8a92e2ee VT |
452 | rc_update = false; |
453 | } else { | |
db1a052b | 454 | ath_tx_rc_status(bf, ts, nbad, txok, false); |
8a92e2ee VT |
455 | } |
456 | ||
db1a052b FF |
457 | ath_tx_complete_buf(sc, bf, txq, &bf_head, ts, |
458 | !txfail, sendbar); | |
e8324357 | 459 | } else { |
d43f3015 | 460 | /* retry the un-acked ones */ |
e5003249 VT |
461 | if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)) { |
462 | if (bf->bf_next == NULL && bf_last->bf_stale) { | |
463 | struct ath_buf *tbf; | |
464 | ||
465 | tbf = ath_clone_txbuf(sc, bf_last); | |
466 | /* | |
467 | * Update tx baw and complete the | |
468 | * frame with failed status if we | |
469 | * run out of tx buf. | |
470 | */ | |
471 | if (!tbf) { | |
472 | spin_lock_bh(&txq->axq_lock); | |
473 | ath_tx_update_baw(sc, tid, | |
474 | bf->bf_seqno); | |
475 | spin_unlock_bh(&txq->axq_lock); | |
476 | ||
477 | bf->bf_state.bf_type |= | |
478 | BUF_XRETRY; | |
479 | ath_tx_rc_status(bf, ts, nbad, | |
480 | 0, false); | |
481 | ath_tx_complete_buf(sc, bf, txq, | |
482 | &bf_head, | |
483 | ts, 0, 0); | |
484 | break; | |
485 | } | |
486 | ||
487 | ath9k_hw_cleartxdesc(sc->sc_ah, | |
488 | tbf->bf_desc); | |
489 | list_add_tail(&tbf->list, &bf_head); | |
490 | } else { | |
491 | /* | |
492 | * Clear descriptor status words for | |
493 | * software retry | |
494 | */ | |
495 | ath9k_hw_cleartxdesc(sc->sc_ah, | |
496 | bf->bf_desc); | |
c41d92dc | 497 | } |
e8324357 S |
498 | } |
499 | ||
500 | /* | |
501 | * Put this buffer to the temporary pending | |
502 | * queue to retain ordering | |
503 | */ | |
504 | list_splice_tail_init(&bf_head, &bf_pending); | |
505 | } | |
506 | ||
507 | bf = bf_next; | |
f078f209 | 508 | } |
f078f209 | 509 | |
4cee7861 FF |
510 | /* prepend un-acked frames to the beginning of the pending frame queue */ |
511 | if (!list_empty(&bf_pending)) { | |
512 | spin_lock_bh(&txq->axq_lock); | |
513 | list_splice(&bf_pending, &tid->buf_q); | |
514 | ath_tx_queue_tid(txq, tid); | |
515 | spin_unlock_bh(&txq->axq_lock); | |
516 | } | |
517 | ||
e8324357 | 518 | if (tid->state & AGGR_CLEANUP) { |
90fa539c FF |
519 | ath_tx_flush_tid(sc, tid); |
520 | ||
e8324357 S |
521 | if (tid->baw_head == tid->baw_tail) { |
522 | tid->state &= ~AGGR_ADDBA_COMPLETE; | |
e8324357 | 523 | tid->state &= ~AGGR_CLEANUP; |
d43f3015 | 524 | } |
e8324357 | 525 | } |
f078f209 | 526 | |
1286ec6d S |
527 | rcu_read_unlock(); |
528 | ||
e8324357 S |
529 | if (needreset) |
530 | ath_reset(sc, false); | |
e8324357 | 531 | } |
f078f209 | 532 | |
e8324357 S |
533 | static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf, |
534 | struct ath_atx_tid *tid) | |
f078f209 | 535 | { |
528f0c6b S |
536 | struct sk_buff *skb; |
537 | struct ieee80211_tx_info *tx_info; | |
a8efee4f | 538 | struct ieee80211_tx_rate *rates; |
d43f3015 | 539 | u32 max_4ms_framelen, frmlen; |
4ef70841 | 540 | u16 aggr_limit, legacy = 0; |
e8324357 | 541 | int i; |
528f0c6b | 542 | |
a22be22a | 543 | skb = bf->bf_mpdu; |
528f0c6b | 544 | tx_info = IEEE80211_SKB_CB(skb); |
e63835b0 | 545 | rates = tx_info->control.rates; |
528f0c6b | 546 | |
e8324357 S |
547 | /* |
548 | * Find the lowest frame length among the rate series that will have a | |
549 | * 4ms transmit duration. | |
550 | * TODO - TXOP limit needs to be considered. | |
551 | */ | |
552 | max_4ms_framelen = ATH_AMPDU_LIMIT_MAX; | |
e63835b0 | 553 | |
e8324357 S |
554 | for (i = 0; i < 4; i++) { |
555 | if (rates[i].count) { | |
545750d3 FF |
556 | int modeidx; |
557 | if (!(rates[i].flags & IEEE80211_TX_RC_MCS)) { | |
e8324357 S |
558 | legacy = 1; |
559 | break; | |
560 | } | |
561 | ||
0e668cde | 562 | if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) |
545750d3 FF |
563 | modeidx = MCS_HT40; |
564 | else | |
0e668cde FF |
565 | modeidx = MCS_HT20; |
566 | ||
567 | if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI) | |
568 | modeidx++; | |
545750d3 FF |
569 | |
570 | frmlen = ath_max_4ms_framelen[modeidx][rates[i].idx]; | |
d43f3015 | 571 | max_4ms_framelen = min(max_4ms_framelen, frmlen); |
f078f209 LR |
572 | } |
573 | } | |
e63835b0 | 574 | |
f078f209 | 575 | /* |
e8324357 S |
576 | * limit aggregate size by the minimum rate if rate selected is |
577 | * not a probe rate, if rate selected is a probe rate then | |
578 | * avoid aggregation of this packet. | |
f078f209 | 579 | */ |
e8324357 S |
580 | if (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE || legacy) |
581 | return 0; | |
f078f209 | 582 | |
1773912b VT |
583 | if (sc->sc_flags & SC_OP_BT_PRIORITY_DETECTED) |
584 | aggr_limit = min((max_4ms_framelen * 3) / 8, | |
585 | (u32)ATH_AMPDU_LIMIT_MAX); | |
586 | else | |
587 | aggr_limit = min(max_4ms_framelen, | |
588 | (u32)ATH_AMPDU_LIMIT_MAX); | |
f078f209 | 589 | |
e8324357 S |
590 | /* |
591 | * h/w can accept aggregates upto 16 bit lengths (65535). | |
592 | * The IE, however can hold upto 65536, which shows up here | |
593 | * as zero. Ignore 65536 since we are constrained by hw. | |
f078f209 | 594 | */ |
4ef70841 S |
595 | if (tid->an->maxampdu) |
596 | aggr_limit = min(aggr_limit, tid->an->maxampdu); | |
f078f209 | 597 | |
e8324357 S |
598 | return aggr_limit; |
599 | } | |
f078f209 | 600 | |
e8324357 | 601 | /* |
d43f3015 | 602 | * Returns the number of delimiters to be added to |
e8324357 | 603 | * meet the minimum required mpdudensity. |
e8324357 S |
604 | */ |
605 | static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid, | |
606 | struct ath_buf *bf, u16 frmlen) | |
607 | { | |
e8324357 S |
608 | struct sk_buff *skb = bf->bf_mpdu; |
609 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); | |
4ef70841 | 610 | u32 nsymbits, nsymbols; |
e8324357 | 611 | u16 minlen; |
545750d3 | 612 | u8 flags, rix; |
c6663876 | 613 | int width, streams, half_gi, ndelim, mindelim; |
e8324357 S |
614 | |
615 | /* Select standard number of delimiters based on frame length alone */ | |
616 | ndelim = ATH_AGGR_GET_NDELIM(frmlen); | |
f078f209 LR |
617 | |
618 | /* | |
e8324357 S |
619 | * If encryption enabled, hardware requires some more padding between |
620 | * subframes. | |
621 | * TODO - this could be improved to be dependent on the rate. | |
622 | * The hardware can keep up at lower rates, but not higher rates | |
f078f209 | 623 | */ |
e8324357 S |
624 | if (bf->bf_keytype != ATH9K_KEY_TYPE_CLEAR) |
625 | ndelim += ATH_AGGR_ENCRYPTDELIM; | |
f078f209 | 626 | |
e8324357 S |
627 | /* |
628 | * Convert desired mpdu density from microeconds to bytes based | |
629 | * on highest rate in rate series (i.e. first rate) to determine | |
630 | * required minimum length for subframe. Take into account | |
631 | * whether high rate is 20 or 40Mhz and half or full GI. | |
4ef70841 | 632 | * |
e8324357 S |
633 | * If there is no mpdu density restriction, no further calculation |
634 | * is needed. | |
635 | */ | |
4ef70841 S |
636 | |
637 | if (tid->an->mpdudensity == 0) | |
e8324357 | 638 | return ndelim; |
f078f209 | 639 | |
e8324357 S |
640 | rix = tx_info->control.rates[0].idx; |
641 | flags = tx_info->control.rates[0].flags; | |
e8324357 S |
642 | width = (flags & IEEE80211_TX_RC_40_MHZ_WIDTH) ? 1 : 0; |
643 | half_gi = (flags & IEEE80211_TX_RC_SHORT_GI) ? 1 : 0; | |
f078f209 | 644 | |
e8324357 | 645 | if (half_gi) |
4ef70841 | 646 | nsymbols = NUM_SYMBOLS_PER_USEC_HALFGI(tid->an->mpdudensity); |
e8324357 | 647 | else |
4ef70841 | 648 | nsymbols = NUM_SYMBOLS_PER_USEC(tid->an->mpdudensity); |
f078f209 | 649 | |
e8324357 S |
650 | if (nsymbols == 0) |
651 | nsymbols = 1; | |
f078f209 | 652 | |
c6663876 FF |
653 | streams = HT_RC_2_STREAMS(rix); |
654 | nsymbits = bits_per_symbol[rix % 8][width] * streams; | |
e8324357 | 655 | minlen = (nsymbols * nsymbits) / BITS_PER_BYTE; |
f078f209 | 656 | |
e8324357 | 657 | if (frmlen < minlen) { |
e8324357 S |
658 | mindelim = (minlen - frmlen) / ATH_AGGR_DELIM_SZ; |
659 | ndelim = max(mindelim, ndelim); | |
f078f209 LR |
660 | } |
661 | ||
e8324357 | 662 | return ndelim; |
f078f209 LR |
663 | } |
664 | ||
e8324357 | 665 | static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc, |
fec247c0 | 666 | struct ath_txq *txq, |
d43f3015 S |
667 | struct ath_atx_tid *tid, |
668 | struct list_head *bf_q) | |
f078f209 | 669 | { |
e8324357 | 670 | #define PADBYTES(_len) ((4 - ((_len) % 4)) % 4) |
d43f3015 S |
671 | struct ath_buf *bf, *bf_first, *bf_prev = NULL; |
672 | int rl = 0, nframes = 0, ndelim, prev_al = 0; | |
e8324357 S |
673 | u16 aggr_limit = 0, al = 0, bpad = 0, |
674 | al_delta, h_baw = tid->baw_size / 2; | |
675 | enum ATH_AGGR_STATUS status = ATH_AGGR_DONE; | |
0299a50a | 676 | struct ieee80211_tx_info *tx_info; |
f078f209 | 677 | |
e8324357 | 678 | bf_first = list_first_entry(&tid->buf_q, struct ath_buf, list); |
f078f209 | 679 | |
e8324357 S |
680 | do { |
681 | bf = list_first_entry(&tid->buf_q, struct ath_buf, list); | |
f078f209 | 682 | |
d43f3015 | 683 | /* do not step over block-ack window */ |
e8324357 S |
684 | if (!BAW_WITHIN(tid->seq_start, tid->baw_size, bf->bf_seqno)) { |
685 | status = ATH_AGGR_BAW_CLOSED; | |
686 | break; | |
687 | } | |
f078f209 | 688 | |
e8324357 S |
689 | if (!rl) { |
690 | aggr_limit = ath_lookup_rate(sc, bf, tid); | |
691 | rl = 1; | |
692 | } | |
f078f209 | 693 | |
d43f3015 | 694 | /* do not exceed aggregation limit */ |
e8324357 | 695 | al_delta = ATH_AGGR_DELIM_SZ + bf->bf_frmlen; |
f078f209 | 696 | |
d43f3015 S |
697 | if (nframes && |
698 | (aggr_limit < (al + bpad + al_delta + prev_al))) { | |
e8324357 S |
699 | status = ATH_AGGR_LIMITED; |
700 | break; | |
701 | } | |
f078f209 | 702 | |
0299a50a FF |
703 | tx_info = IEEE80211_SKB_CB(bf->bf_mpdu); |
704 | if (nframes && ((tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) || | |
705 | !(tx_info->control.rates[0].flags & IEEE80211_TX_RC_MCS))) | |
706 | break; | |
707 | ||
d43f3015 S |
708 | /* do not exceed subframe limit */ |
709 | if (nframes >= min((int)h_baw, ATH_AMPDU_SUBFRAME_DEFAULT)) { | |
e8324357 S |
710 | status = ATH_AGGR_LIMITED; |
711 | break; | |
712 | } | |
d43f3015 | 713 | nframes++; |
f078f209 | 714 | |
d43f3015 | 715 | /* add padding for previous frame to aggregation length */ |
e8324357 | 716 | al += bpad + al_delta; |
f078f209 | 717 | |
e8324357 S |
718 | /* |
719 | * Get the delimiters needed to meet the MPDU | |
720 | * density for this node. | |
721 | */ | |
722 | ndelim = ath_compute_num_delims(sc, tid, bf_first, bf->bf_frmlen); | |
e8324357 | 723 | bpad = PADBYTES(al_delta) + (ndelim << 2); |
f078f209 | 724 | |
e8324357 | 725 | bf->bf_next = NULL; |
87d5efbb | 726 | ath9k_hw_set_desc_link(sc->sc_ah, bf->bf_desc, 0); |
f078f209 | 727 | |
d43f3015 | 728 | /* link buffers of this frame to the aggregate */ |
e8324357 | 729 | ath_tx_addto_baw(sc, tid, bf); |
d43f3015 S |
730 | ath9k_hw_set11n_aggr_middle(sc->sc_ah, bf->bf_desc, ndelim); |
731 | list_move_tail(&bf->list, bf_q); | |
e8324357 S |
732 | if (bf_prev) { |
733 | bf_prev->bf_next = bf; | |
87d5efbb VT |
734 | ath9k_hw_set_desc_link(sc->sc_ah, bf_prev->bf_desc, |
735 | bf->bf_daddr); | |
e8324357 S |
736 | } |
737 | bf_prev = bf; | |
fec247c0 | 738 | |
e8324357 | 739 | } while (!list_empty(&tid->buf_q)); |
f078f209 | 740 | |
e8324357 S |
741 | bf_first->bf_al = al; |
742 | bf_first->bf_nframes = nframes; | |
d43f3015 | 743 | |
e8324357 S |
744 | return status; |
745 | #undef PADBYTES | |
746 | } | |
f078f209 | 747 | |
e8324357 S |
748 | static void ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq, |
749 | struct ath_atx_tid *tid) | |
750 | { | |
d43f3015 | 751 | struct ath_buf *bf; |
e8324357 S |
752 | enum ATH_AGGR_STATUS status; |
753 | struct list_head bf_q; | |
f078f209 | 754 | |
e8324357 S |
755 | do { |
756 | if (list_empty(&tid->buf_q)) | |
757 | return; | |
f078f209 | 758 | |
e8324357 S |
759 | INIT_LIST_HEAD(&bf_q); |
760 | ||
fec247c0 | 761 | status = ath_tx_form_aggr(sc, txq, tid, &bf_q); |
f078f209 | 762 | |
f078f209 | 763 | /* |
d43f3015 S |
764 | * no frames picked up to be aggregated; |
765 | * block-ack window is not open. | |
f078f209 | 766 | */ |
e8324357 S |
767 | if (list_empty(&bf_q)) |
768 | break; | |
f078f209 | 769 | |
e8324357 | 770 | bf = list_first_entry(&bf_q, struct ath_buf, list); |
d43f3015 | 771 | bf->bf_lastbf = list_entry(bf_q.prev, struct ath_buf, list); |
f078f209 | 772 | |
d43f3015 | 773 | /* if only one frame, send as non-aggregate */ |
e8324357 | 774 | if (bf->bf_nframes == 1) { |
e8324357 | 775 | bf->bf_state.bf_type &= ~BUF_AGGR; |
d43f3015 | 776 | ath9k_hw_clr11n_aggr(sc->sc_ah, bf->bf_desc); |
e8324357 S |
777 | ath_buf_set_rate(sc, bf); |
778 | ath_tx_txqaddbuf(sc, txq, &bf_q); | |
779 | continue; | |
780 | } | |
f078f209 | 781 | |
d43f3015 | 782 | /* setup first desc of aggregate */ |
e8324357 S |
783 | bf->bf_state.bf_type |= BUF_AGGR; |
784 | ath_buf_set_rate(sc, bf); | |
785 | ath9k_hw_set11n_aggr_first(sc->sc_ah, bf->bf_desc, bf->bf_al); | |
f078f209 | 786 | |
d43f3015 S |
787 | /* anchor last desc of aggregate */ |
788 | ath9k_hw_set11n_aggr_last(sc->sc_ah, bf->bf_lastbf->bf_desc); | |
f078f209 | 789 | |
e8324357 | 790 | ath_tx_txqaddbuf(sc, txq, &bf_q); |
fec247c0 | 791 | TX_STAT_INC(txq->axq_qnum, a_aggr); |
f078f209 | 792 | |
e8324357 S |
793 | } while (txq->axq_depth < ATH_AGGR_MIN_QDEPTH && |
794 | status != ATH_AGGR_BAW_CLOSED); | |
795 | } | |
796 | ||
231c3a1f FF |
797 | int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta, |
798 | u16 tid, u16 *ssn) | |
e8324357 S |
799 | { |
800 | struct ath_atx_tid *txtid; | |
801 | struct ath_node *an; | |
802 | ||
803 | an = (struct ath_node *)sta->drv_priv; | |
f83da965 | 804 | txtid = ATH_AN_2_TID(an, tid); |
231c3a1f FF |
805 | |
806 | if (txtid->state & (AGGR_CLEANUP | AGGR_ADDBA_COMPLETE)) | |
807 | return -EAGAIN; | |
808 | ||
f83da965 | 809 | txtid->state |= AGGR_ADDBA_PROGRESS; |
75401849 | 810 | txtid->paused = true; |
f83da965 | 811 | *ssn = txtid->seq_start; |
231c3a1f FF |
812 | |
813 | return 0; | |
e8324357 | 814 | } |
f078f209 | 815 | |
f83da965 | 816 | void ath_tx_aggr_stop(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid) |
e8324357 S |
817 | { |
818 | struct ath_node *an = (struct ath_node *)sta->drv_priv; | |
819 | struct ath_atx_tid *txtid = ATH_AN_2_TID(an, tid); | |
820 | struct ath_txq *txq = &sc->tx.txq[txtid->ac->qnum]; | |
f078f209 | 821 | |
e8324357 | 822 | if (txtid->state & AGGR_CLEANUP) |
f83da965 | 823 | return; |
f078f209 | 824 | |
e8324357 | 825 | if (!(txtid->state & AGGR_ADDBA_COMPLETE)) { |
5eae6592 | 826 | txtid->state &= ~AGGR_ADDBA_PROGRESS; |
f83da965 | 827 | return; |
e8324357 | 828 | } |
f078f209 | 829 | |
e8324357 | 830 | spin_lock_bh(&txq->axq_lock); |
75401849 | 831 | txtid->paused = true; |
f078f209 | 832 | |
90fa539c FF |
833 | /* |
834 | * If frames are still being transmitted for this TID, they will be | |
835 | * cleaned up during tx completion. To prevent race conditions, this | |
836 | * TID can only be reused after all in-progress subframes have been | |
837 | * completed. | |
838 | */ | |
839 | if (txtid->baw_head != txtid->baw_tail) | |
e8324357 | 840 | txtid->state |= AGGR_CLEANUP; |
90fa539c | 841 | else |
e8324357 | 842 | txtid->state &= ~AGGR_ADDBA_COMPLETE; |
90fa539c FF |
843 | spin_unlock_bh(&txq->axq_lock); |
844 | ||
845 | ath_tx_flush_tid(sc, txtid); | |
e8324357 | 846 | } |
f078f209 | 847 | |
e8324357 S |
848 | void ath_tx_aggr_resume(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid) |
849 | { | |
850 | struct ath_atx_tid *txtid; | |
851 | struct ath_node *an; | |
852 | ||
853 | an = (struct ath_node *)sta->drv_priv; | |
854 | ||
855 | if (sc->sc_flags & SC_OP_TXAGGR) { | |
856 | txtid = ATH_AN_2_TID(an, tid); | |
857 | txtid->baw_size = | |
858 | IEEE80211_MIN_AMPDU_BUF << sta->ht_cap.ampdu_factor; | |
859 | txtid->state |= AGGR_ADDBA_COMPLETE; | |
860 | txtid->state &= ~AGGR_ADDBA_PROGRESS; | |
861 | ath_tx_resume_tid(sc, txtid); | |
862 | } | |
f078f209 LR |
863 | } |
864 | ||
e8324357 S |
865 | /********************/ |
866 | /* Queue Management */ | |
867 | /********************/ | |
f078f209 | 868 | |
e8324357 S |
869 | static void ath_txq_drain_pending_buffers(struct ath_softc *sc, |
870 | struct ath_txq *txq) | |
f078f209 | 871 | { |
e8324357 S |
872 | struct ath_atx_ac *ac, *ac_tmp; |
873 | struct ath_atx_tid *tid, *tid_tmp; | |
f078f209 | 874 | |
e8324357 S |
875 | list_for_each_entry_safe(ac, ac_tmp, &txq->axq_acq, list) { |
876 | list_del(&ac->list); | |
877 | ac->sched = false; | |
878 | list_for_each_entry_safe(tid, tid_tmp, &ac->tid_q, list) { | |
879 | list_del(&tid->list); | |
880 | tid->sched = false; | |
881 | ath_tid_drain(sc, txq, tid); | |
882 | } | |
f078f209 LR |
883 | } |
884 | } | |
885 | ||
e8324357 | 886 | struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype) |
f078f209 | 887 | { |
cbe61d8a | 888 | struct ath_hw *ah = sc->sc_ah; |
c46917bb | 889 | struct ath_common *common = ath9k_hw_common(ah); |
e8324357 | 890 | struct ath9k_tx_queue_info qi; |
e5003249 | 891 | int qnum, i; |
f078f209 | 892 | |
e8324357 S |
893 | memset(&qi, 0, sizeof(qi)); |
894 | qi.tqi_subtype = subtype; | |
895 | qi.tqi_aifs = ATH9K_TXQ_USEDEFAULT; | |
896 | qi.tqi_cwmin = ATH9K_TXQ_USEDEFAULT; | |
897 | qi.tqi_cwmax = ATH9K_TXQ_USEDEFAULT; | |
898 | qi.tqi_physCompBuf = 0; | |
f078f209 LR |
899 | |
900 | /* | |
e8324357 S |
901 | * Enable interrupts only for EOL and DESC conditions. |
902 | * We mark tx descriptors to receive a DESC interrupt | |
903 | * when a tx queue gets deep; otherwise waiting for the | |
904 | * EOL to reap descriptors. Note that this is done to | |
905 | * reduce interrupt load and this only defers reaping | |
906 | * descriptors, never transmitting frames. Aside from | |
907 | * reducing interrupts this also permits more concurrency. | |
908 | * The only potential downside is if the tx queue backs | |
909 | * up in which case the top half of the kernel may backup | |
910 | * due to a lack of tx descriptors. | |
911 | * | |
912 | * The UAPSD queue is an exception, since we take a desc- | |
913 | * based intr on the EOSP frames. | |
f078f209 | 914 | */ |
afe754d6 VT |
915 | if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
916 | qi.tqi_qflags = TXQ_FLAG_TXOKINT_ENABLE | | |
917 | TXQ_FLAG_TXERRINT_ENABLE; | |
918 | } else { | |
919 | if (qtype == ATH9K_TX_QUEUE_UAPSD) | |
920 | qi.tqi_qflags = TXQ_FLAG_TXDESCINT_ENABLE; | |
921 | else | |
922 | qi.tqi_qflags = TXQ_FLAG_TXEOLINT_ENABLE | | |
923 | TXQ_FLAG_TXDESCINT_ENABLE; | |
924 | } | |
e8324357 S |
925 | qnum = ath9k_hw_setuptxqueue(ah, qtype, &qi); |
926 | if (qnum == -1) { | |
f078f209 | 927 | /* |
e8324357 S |
928 | * NB: don't print a message, this happens |
929 | * normally on parts with too few tx queues | |
f078f209 | 930 | */ |
e8324357 | 931 | return NULL; |
f078f209 | 932 | } |
e8324357 | 933 | if (qnum >= ARRAY_SIZE(sc->tx.txq)) { |
c46917bb LR |
934 | ath_print(common, ATH_DBG_FATAL, |
935 | "qnum %u out of range, max %u!\n", | |
936 | qnum, (unsigned int)ARRAY_SIZE(sc->tx.txq)); | |
e8324357 S |
937 | ath9k_hw_releasetxqueue(ah, qnum); |
938 | return NULL; | |
939 | } | |
940 | if (!ATH_TXQ_SETUP(sc, qnum)) { | |
941 | struct ath_txq *txq = &sc->tx.txq[qnum]; | |
f078f209 | 942 | |
293f2ba8 | 943 | txq->axq_class = subtype; |
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 | ||
e8324357 S |
961 | int ath_txq_update(struct ath_softc *sc, int qnum, |
962 | struct ath9k_tx_queue_info *qinfo) | |
963 | { | |
cbe61d8a | 964 | struct ath_hw *ah = sc->sc_ah; |
e8324357 S |
965 | int error = 0; |
966 | struct ath9k_tx_queue_info qi; | |
967 | ||
968 | if (qnum == sc->beacon.beaconq) { | |
969 | /* | |
970 | * XXX: for beacon queue, we just save the parameter. | |
971 | * It will be picked up by ath_beaconq_config when | |
972 | * it's necessary. | |
973 | */ | |
974 | sc->beacon.beacon_qi = *qinfo; | |
f078f209 | 975 | return 0; |
e8324357 | 976 | } |
f078f209 | 977 | |
9680e8a3 | 978 | BUG_ON(sc->tx.txq[qnum].axq_qnum != qnum); |
e8324357 S |
979 | |
980 | ath9k_hw_get_txq_props(ah, qnum, &qi); | |
981 | qi.tqi_aifs = qinfo->tqi_aifs; | |
982 | qi.tqi_cwmin = qinfo->tqi_cwmin; | |
983 | qi.tqi_cwmax = qinfo->tqi_cwmax; | |
984 | qi.tqi_burstTime = qinfo->tqi_burstTime; | |
985 | qi.tqi_readyTime = qinfo->tqi_readyTime; | |
986 | ||
987 | if (!ath9k_hw_set_txq_props(ah, qnum, &qi)) { | |
c46917bb LR |
988 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL, |
989 | "Unable to update hardware queue %u!\n", qnum); | |
e8324357 S |
990 | error = -EIO; |
991 | } else { | |
992 | ath9k_hw_resettxqueue(ah, qnum); | |
993 | } | |
994 | ||
995 | return error; | |
996 | } | |
997 | ||
998 | int ath_cabq_update(struct ath_softc *sc) | |
999 | { | |
1000 | struct ath9k_tx_queue_info qi; | |
1001 | int qnum = sc->beacon.cabq->axq_qnum; | |
f078f209 | 1002 | |
e8324357 | 1003 | ath9k_hw_get_txq_props(sc->sc_ah, qnum, &qi); |
f078f209 | 1004 | /* |
e8324357 | 1005 | * Ensure the readytime % is within the bounds. |
f078f209 | 1006 | */ |
17d7904d S |
1007 | if (sc->config.cabqReadytime < ATH9K_READY_TIME_LO_BOUND) |
1008 | sc->config.cabqReadytime = ATH9K_READY_TIME_LO_BOUND; | |
1009 | else if (sc->config.cabqReadytime > ATH9K_READY_TIME_HI_BOUND) | |
1010 | sc->config.cabqReadytime = ATH9K_READY_TIME_HI_BOUND; | |
f078f209 | 1011 | |
57c4d7b4 | 1012 | qi.tqi_readyTime = (sc->beacon_interval * |
fdbf7335 | 1013 | sc->config.cabqReadytime) / 100; |
e8324357 S |
1014 | ath_txq_update(sc, qnum, &qi); |
1015 | ||
1016 | return 0; | |
f078f209 LR |
1017 | } |
1018 | ||
043a0405 S |
1019 | /* |
1020 | * Drain a given TX queue (could be Beacon or Data) | |
1021 | * | |
1022 | * This assumes output has been stopped and | |
1023 | * we do not need to block ath_tx_tasklet. | |
1024 | */ | |
1025 | void ath_draintxq(struct ath_softc *sc, struct ath_txq *txq, bool retry_tx) | |
f078f209 | 1026 | { |
e8324357 S |
1027 | struct ath_buf *bf, *lastbf; |
1028 | struct list_head bf_head; | |
db1a052b FF |
1029 | struct ath_tx_status ts; |
1030 | ||
1031 | memset(&ts, 0, sizeof(ts)); | |
e8324357 | 1032 | INIT_LIST_HEAD(&bf_head); |
f078f209 | 1033 | |
e8324357 S |
1034 | for (;;) { |
1035 | spin_lock_bh(&txq->axq_lock); | |
f078f209 | 1036 | |
e5003249 VT |
1037 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
1038 | if (list_empty(&txq->txq_fifo[txq->txq_tailidx])) { | |
1039 | txq->txq_headidx = txq->txq_tailidx = 0; | |
1040 | spin_unlock_bh(&txq->axq_lock); | |
1041 | break; | |
1042 | } else { | |
1043 | bf = list_first_entry(&txq->txq_fifo[txq->txq_tailidx], | |
1044 | struct ath_buf, list); | |
1045 | } | |
1046 | } else { | |
1047 | if (list_empty(&txq->axq_q)) { | |
1048 | txq->axq_link = NULL; | |
1049 | spin_unlock_bh(&txq->axq_lock); | |
1050 | break; | |
1051 | } | |
1052 | bf = list_first_entry(&txq->axq_q, struct ath_buf, | |
1053 | list); | |
f078f209 | 1054 | |
e5003249 VT |
1055 | if (bf->bf_stale) { |
1056 | list_del(&bf->list); | |
1057 | spin_unlock_bh(&txq->axq_lock); | |
f078f209 | 1058 | |
0a8cea84 | 1059 | ath_tx_return_buffer(sc, bf); |
e5003249 VT |
1060 | continue; |
1061 | } | |
e8324357 | 1062 | } |
f078f209 | 1063 | |
e8324357 | 1064 | lastbf = bf->bf_lastbf; |
6d913f7d VT |
1065 | if (!retry_tx) |
1066 | lastbf->bf_tx_aborted = true; | |
f078f209 | 1067 | |
e5003249 VT |
1068 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
1069 | list_cut_position(&bf_head, | |
1070 | &txq->txq_fifo[txq->txq_tailidx], | |
1071 | &lastbf->list); | |
1072 | INCR(txq->txq_tailidx, ATH_TXFIFO_DEPTH); | |
1073 | } else { | |
1074 | /* remove ath_buf's of the same mpdu from txq */ | |
1075 | list_cut_position(&bf_head, &txq->axq_q, &lastbf->list); | |
1076 | } | |
1077 | ||
e8324357 | 1078 | txq->axq_depth--; |
f078f209 | 1079 | |
e8324357 S |
1080 | spin_unlock_bh(&txq->axq_lock); |
1081 | ||
1082 | if (bf_isampdu(bf)) | |
db1a052b | 1083 | ath_tx_complete_aggr(sc, txq, bf, &bf_head, &ts, 0); |
e8324357 | 1084 | else |
db1a052b | 1085 | ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, 0, 0); |
f078f209 LR |
1086 | } |
1087 | ||
164ace38 SB |
1088 | spin_lock_bh(&txq->axq_lock); |
1089 | txq->axq_tx_inprogress = false; | |
1090 | spin_unlock_bh(&txq->axq_lock); | |
1091 | ||
e5003249 VT |
1092 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
1093 | spin_lock_bh(&txq->axq_lock); | |
1094 | while (!list_empty(&txq->txq_fifo_pending)) { | |
1095 | bf = list_first_entry(&txq->txq_fifo_pending, | |
1096 | struct ath_buf, list); | |
1097 | list_cut_position(&bf_head, | |
1098 | &txq->txq_fifo_pending, | |
1099 | &bf->bf_lastbf->list); | |
1100 | spin_unlock_bh(&txq->axq_lock); | |
1101 | ||
1102 | if (bf_isampdu(bf)) | |
1103 | ath_tx_complete_aggr(sc, txq, bf, &bf_head, | |
1104 | &ts, 0); | |
1105 | else | |
1106 | ath_tx_complete_buf(sc, bf, txq, &bf_head, | |
1107 | &ts, 0, 0); | |
1108 | spin_lock_bh(&txq->axq_lock); | |
1109 | } | |
1110 | spin_unlock_bh(&txq->axq_lock); | |
1111 | } | |
e609e2ea FF |
1112 | |
1113 | /* flush any pending frames if aggregation is enabled */ | |
1114 | if (sc->sc_flags & SC_OP_TXAGGR) { | |
1115 | if (!retry_tx) { | |
1116 | spin_lock_bh(&txq->axq_lock); | |
1117 | ath_txq_drain_pending_buffers(sc, txq); | |
1118 | spin_unlock_bh(&txq->axq_lock); | |
1119 | } | |
1120 | } | |
f078f209 LR |
1121 | } |
1122 | ||
043a0405 | 1123 | void ath_drain_all_txq(struct ath_softc *sc, bool retry_tx) |
f078f209 | 1124 | { |
cbe61d8a | 1125 | struct ath_hw *ah = sc->sc_ah; |
c46917bb | 1126 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
043a0405 S |
1127 | struct ath_txq *txq; |
1128 | int i, npend = 0; | |
1129 | ||
1130 | if (sc->sc_flags & SC_OP_INVALID) | |
1131 | return; | |
1132 | ||
1133 | /* Stop beacon queue */ | |
1134 | ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq); | |
1135 | ||
1136 | /* Stop data queues */ | |
1137 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { | |
1138 | if (ATH_TXQ_SETUP(sc, i)) { | |
1139 | txq = &sc->tx.txq[i]; | |
1140 | ath9k_hw_stoptxdma(ah, txq->axq_qnum); | |
1141 | npend += ath9k_hw_numtxpending(ah, txq->axq_qnum); | |
1142 | } | |
1143 | } | |
1144 | ||
1145 | if (npend) { | |
1146 | int r; | |
1147 | ||
e8009e98 | 1148 | ath_print(common, ATH_DBG_FATAL, |
9be8ab2e | 1149 | "Failed to stop TX DMA. Resetting hardware!\n"); |
043a0405 S |
1150 | |
1151 | spin_lock_bh(&sc->sc_resetlock); | |
20bd2a09 | 1152 | r = ath9k_hw_reset(ah, sc->sc_ah->curchan, ah->caldata, false); |
043a0405 | 1153 | if (r) |
c46917bb LR |
1154 | ath_print(common, ATH_DBG_FATAL, |
1155 | "Unable to reset hardware; reset status %d\n", | |
1156 | r); | |
043a0405 S |
1157 | spin_unlock_bh(&sc->sc_resetlock); |
1158 | } | |
1159 | ||
1160 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { | |
1161 | if (ATH_TXQ_SETUP(sc, i)) | |
1162 | ath_draintxq(sc, &sc->tx.txq[i], retry_tx); | |
1163 | } | |
e8324357 | 1164 | } |
f078f209 | 1165 | |
043a0405 | 1166 | void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq) |
e8324357 | 1167 | { |
043a0405 S |
1168 | ath9k_hw_releasetxqueue(sc->sc_ah, txq->axq_qnum); |
1169 | sc->tx.txqsetup &= ~(1<<txq->axq_qnum); | |
e8324357 | 1170 | } |
f078f209 | 1171 | |
e8324357 S |
1172 | void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq) |
1173 | { | |
1174 | struct ath_atx_ac *ac; | |
1175 | struct ath_atx_tid *tid; | |
f078f209 | 1176 | |
e8324357 S |
1177 | if (list_empty(&txq->axq_acq)) |
1178 | return; | |
f078f209 | 1179 | |
e8324357 S |
1180 | ac = list_first_entry(&txq->axq_acq, struct ath_atx_ac, list); |
1181 | list_del(&ac->list); | |
1182 | ac->sched = false; | |
f078f209 | 1183 | |
e8324357 S |
1184 | do { |
1185 | if (list_empty(&ac->tid_q)) | |
1186 | return; | |
f078f209 | 1187 | |
e8324357 S |
1188 | tid = list_first_entry(&ac->tid_q, struct ath_atx_tid, list); |
1189 | list_del(&tid->list); | |
1190 | tid->sched = false; | |
f078f209 | 1191 | |
e8324357 S |
1192 | if (tid->paused) |
1193 | continue; | |
f078f209 | 1194 | |
164ace38 | 1195 | ath_tx_sched_aggr(sc, txq, tid); |
f078f209 LR |
1196 | |
1197 | /* | |
e8324357 S |
1198 | * add tid to round-robin queue if more frames |
1199 | * are pending for the tid | |
f078f209 | 1200 | */ |
e8324357 S |
1201 | if (!list_empty(&tid->buf_q)) |
1202 | ath_tx_queue_tid(txq, tid); | |
f078f209 | 1203 | |
e8324357 S |
1204 | break; |
1205 | } while (!list_empty(&ac->tid_q)); | |
f078f209 | 1206 | |
e8324357 S |
1207 | if (!list_empty(&ac->tid_q)) { |
1208 | if (!ac->sched) { | |
1209 | ac->sched = true; | |
1210 | list_add_tail(&ac->list, &txq->axq_acq); | |
f078f209 | 1211 | } |
e8324357 S |
1212 | } |
1213 | } | |
f078f209 | 1214 | |
e8324357 S |
1215 | int ath_tx_setup(struct ath_softc *sc, int haltype) |
1216 | { | |
1217 | struct ath_txq *txq; | |
f078f209 | 1218 | |
e8324357 | 1219 | if (haltype >= ARRAY_SIZE(sc->tx.hwq_map)) { |
c46917bb LR |
1220 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL, |
1221 | "HAL AC %u out of range, max %zu!\n", | |
e8324357 S |
1222 | haltype, ARRAY_SIZE(sc->tx.hwq_map)); |
1223 | return 0; | |
1224 | } | |
1225 | txq = ath_txq_setup(sc, ATH9K_TX_QUEUE_DATA, haltype); | |
1226 | if (txq != NULL) { | |
1227 | sc->tx.hwq_map[haltype] = txq->axq_qnum; | |
1228 | return 1; | |
1229 | } else | |
1230 | return 0; | |
f078f209 LR |
1231 | } |
1232 | ||
e8324357 S |
1233 | /***********/ |
1234 | /* TX, DMA */ | |
1235 | /***********/ | |
1236 | ||
f078f209 | 1237 | /* |
e8324357 S |
1238 | * Insert a chain of ath_buf (descriptors) on a txq and |
1239 | * assume the descriptors are already chained together by caller. | |
f078f209 | 1240 | */ |
e8324357 S |
1241 | static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, |
1242 | struct list_head *head) | |
f078f209 | 1243 | { |
cbe61d8a | 1244 | struct ath_hw *ah = sc->sc_ah; |
c46917bb | 1245 | struct ath_common *common = ath9k_hw_common(ah); |
e8324357 | 1246 | struct ath_buf *bf; |
f078f209 | 1247 | |
e8324357 S |
1248 | /* |
1249 | * Insert the frame on the outbound list and | |
1250 | * pass it on to the hardware. | |
1251 | */ | |
f078f209 | 1252 | |
e8324357 S |
1253 | if (list_empty(head)) |
1254 | return; | |
f078f209 | 1255 | |
e8324357 | 1256 | bf = list_first_entry(head, struct ath_buf, list); |
f078f209 | 1257 | |
c46917bb LR |
1258 | ath_print(common, ATH_DBG_QUEUE, |
1259 | "qnum: %d, txq depth: %d\n", txq->axq_qnum, txq->axq_depth); | |
f078f209 | 1260 | |
e5003249 VT |
1261 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
1262 | if (txq->axq_depth >= ATH_TXFIFO_DEPTH) { | |
1263 | list_splice_tail_init(head, &txq->txq_fifo_pending); | |
1264 | return; | |
1265 | } | |
1266 | if (!list_empty(&txq->txq_fifo[txq->txq_headidx])) | |
1267 | ath_print(common, ATH_DBG_XMIT, | |
1268 | "Initializing tx fifo %d which " | |
1269 | "is non-empty\n", | |
1270 | txq->txq_headidx); | |
1271 | INIT_LIST_HEAD(&txq->txq_fifo[txq->txq_headidx]); | |
1272 | list_splice_init(head, &txq->txq_fifo[txq->txq_headidx]); | |
1273 | INCR(txq->txq_headidx, ATH_TXFIFO_DEPTH); | |
e8324357 | 1274 | ath9k_hw_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); |
c46917bb LR |
1275 | ath_print(common, ATH_DBG_XMIT, |
1276 | "TXDP[%u] = %llx (%p)\n", | |
1277 | txq->axq_qnum, ito64(bf->bf_daddr), bf->bf_desc); | |
e8324357 | 1278 | } else { |
e5003249 VT |
1279 | list_splice_tail_init(head, &txq->axq_q); |
1280 | ||
1281 | if (txq->axq_link == NULL) { | |
1282 | ath9k_hw_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); | |
1283 | ath_print(common, ATH_DBG_XMIT, | |
1284 | "TXDP[%u] = %llx (%p)\n", | |
1285 | txq->axq_qnum, ito64(bf->bf_daddr), | |
1286 | bf->bf_desc); | |
1287 | } else { | |
1288 | *txq->axq_link = bf->bf_daddr; | |
1289 | ath_print(common, ATH_DBG_XMIT, | |
1290 | "link[%u] (%p)=%llx (%p)\n", | |
1291 | txq->axq_qnum, txq->axq_link, | |
1292 | ito64(bf->bf_daddr), bf->bf_desc); | |
1293 | } | |
1294 | ath9k_hw_get_desc_link(ah, bf->bf_lastbf->bf_desc, | |
1295 | &txq->axq_link); | |
1296 | ath9k_hw_txstart(ah, txq->axq_qnum); | |
e8324357 | 1297 | } |
e5003249 | 1298 | txq->axq_depth++; |
e8324357 | 1299 | } |
f078f209 | 1300 | |
e8324357 S |
1301 | static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid, |
1302 | struct list_head *bf_head, | |
1303 | struct ath_tx_control *txctl) | |
f078f209 LR |
1304 | { |
1305 | struct ath_buf *bf; | |
f078f209 | 1306 | |
e8324357 S |
1307 | bf = list_first_entry(bf_head, struct ath_buf, list); |
1308 | bf->bf_state.bf_type |= BUF_AMPDU; | |
fec247c0 | 1309 | TX_STAT_INC(txctl->txq->axq_qnum, a_queued); |
f078f209 | 1310 | |
e8324357 S |
1311 | /* |
1312 | * Do not queue to h/w when any of the following conditions is true: | |
1313 | * - there are pending frames in software queue | |
1314 | * - the TID is currently paused for ADDBA/BAR request | |
1315 | * - seqno is not within block-ack window | |
1316 | * - h/w queue depth exceeds low water mark | |
1317 | */ | |
1318 | if (!list_empty(&tid->buf_q) || tid->paused || | |
1319 | !BAW_WITHIN(tid->seq_start, tid->baw_size, bf->bf_seqno) || | |
1320 | txctl->txq->axq_depth >= ATH_AGGR_MIN_QDEPTH) { | |
f078f209 | 1321 | /* |
e8324357 S |
1322 | * Add this frame to software queue for scheduling later |
1323 | * for aggregation. | |
f078f209 | 1324 | */ |
d43f3015 | 1325 | list_move_tail(&bf->list, &tid->buf_q); |
e8324357 S |
1326 | ath_tx_queue_tid(txctl->txq, tid); |
1327 | return; | |
1328 | } | |
1329 | ||
1330 | /* Add sub-frame to BAW */ | |
1331 | ath_tx_addto_baw(sc, tid, bf); | |
1332 | ||
1333 | /* Queue to h/w without aggregation */ | |
1334 | bf->bf_nframes = 1; | |
d43f3015 | 1335 | bf->bf_lastbf = bf; |
e8324357 S |
1336 | ath_buf_set_rate(sc, bf); |
1337 | ath_tx_txqaddbuf(sc, txctl->txq, bf_head); | |
e8324357 S |
1338 | } |
1339 | ||
c37452b0 S |
1340 | static void ath_tx_send_ht_normal(struct ath_softc *sc, struct ath_txq *txq, |
1341 | struct ath_atx_tid *tid, | |
1342 | struct list_head *bf_head) | |
e8324357 S |
1343 | { |
1344 | struct ath_buf *bf; | |
1345 | ||
e8324357 S |
1346 | bf = list_first_entry(bf_head, struct ath_buf, list); |
1347 | bf->bf_state.bf_type &= ~BUF_AMPDU; | |
1348 | ||
1349 | /* update starting sequence number for subsequent ADDBA request */ | |
1350 | INCR(tid->seq_start, IEEE80211_SEQ_MAX); | |
1351 | ||
1352 | bf->bf_nframes = 1; | |
d43f3015 | 1353 | bf->bf_lastbf = bf; |
e8324357 S |
1354 | ath_buf_set_rate(sc, bf); |
1355 | ath_tx_txqaddbuf(sc, txq, bf_head); | |
fec247c0 | 1356 | TX_STAT_INC(txq->axq_qnum, queued); |
e8324357 S |
1357 | } |
1358 | ||
c37452b0 S |
1359 | static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq, |
1360 | struct list_head *bf_head) | |
1361 | { | |
1362 | struct ath_buf *bf; | |
1363 | ||
1364 | bf = list_first_entry(bf_head, struct ath_buf, list); | |
1365 | ||
1366 | bf->bf_lastbf = bf; | |
1367 | bf->bf_nframes = 1; | |
1368 | ath_buf_set_rate(sc, bf); | |
1369 | ath_tx_txqaddbuf(sc, txq, bf_head); | |
fec247c0 | 1370 | TX_STAT_INC(txq->axq_qnum, queued); |
c37452b0 S |
1371 | } |
1372 | ||
e8324357 S |
1373 | static enum ath9k_pkt_type get_hw_packet_type(struct sk_buff *skb) |
1374 | { | |
1375 | struct ieee80211_hdr *hdr; | |
1376 | enum ath9k_pkt_type htype; | |
1377 | __le16 fc; | |
1378 | ||
1379 | hdr = (struct ieee80211_hdr *)skb->data; | |
1380 | fc = hdr->frame_control; | |
1381 | ||
1382 | if (ieee80211_is_beacon(fc)) | |
1383 | htype = ATH9K_PKT_TYPE_BEACON; | |
1384 | else if (ieee80211_is_probe_resp(fc)) | |
1385 | htype = ATH9K_PKT_TYPE_PROBE_RESP; | |
1386 | else if (ieee80211_is_atim(fc)) | |
1387 | htype = ATH9K_PKT_TYPE_ATIM; | |
1388 | else if (ieee80211_is_pspoll(fc)) | |
1389 | htype = ATH9K_PKT_TYPE_PSPOLL; | |
1390 | else | |
1391 | htype = ATH9K_PKT_TYPE_NORMAL; | |
1392 | ||
1393 | return htype; | |
1394 | } | |
1395 | ||
e8324357 S |
1396 | static void assign_aggr_tid_seqno(struct sk_buff *skb, |
1397 | struct ath_buf *bf) | |
1398 | { | |
1399 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); | |
1400 | struct ieee80211_hdr *hdr; | |
1401 | struct ath_node *an; | |
1402 | struct ath_atx_tid *tid; | |
1403 | __le16 fc; | |
1404 | u8 *qc; | |
1405 | ||
1406 | if (!tx_info->control.sta) | |
1407 | return; | |
1408 | ||
1409 | an = (struct ath_node *)tx_info->control.sta->drv_priv; | |
1410 | hdr = (struct ieee80211_hdr *)skb->data; | |
1411 | fc = hdr->frame_control; | |
1412 | ||
1413 | if (ieee80211_is_data_qos(fc)) { | |
1414 | qc = ieee80211_get_qos_ctl(hdr); | |
1415 | bf->bf_tidno = qc[0] & 0xf; | |
1416 | } | |
1417 | ||
1418 | /* | |
1419 | * For HT capable stations, we save tidno for later use. | |
1420 | * We also override seqno set by upper layer with the one | |
1421 | * in tx aggregation state. | |
e8324357 S |
1422 | */ |
1423 | tid = ATH_AN_2_TID(an, bf->bf_tidno); | |
17b182e3 | 1424 | hdr->seq_ctrl = cpu_to_le16(tid->seq_next << IEEE80211_SEQ_SEQ_SHIFT); |
e8324357 S |
1425 | bf->bf_seqno = tid->seq_next; |
1426 | INCR(tid->seq_next, IEEE80211_SEQ_MAX); | |
1427 | } | |
1428 | ||
b0a33448 | 1429 | static int setup_tx_flags(struct sk_buff *skb, bool use_ldpc) |
e8324357 S |
1430 | { |
1431 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); | |
1432 | int flags = 0; | |
1433 | ||
1434 | flags |= ATH9K_TXDESC_CLRDMASK; /* needed for crypto errors */ | |
1435 | flags |= ATH9K_TXDESC_INTREQ; | |
1436 | ||
1437 | if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK) | |
1438 | flags |= ATH9K_TXDESC_NOACK; | |
e8324357 | 1439 | |
b0a33448 LR |
1440 | if (use_ldpc) |
1441 | flags |= ATH9K_TXDESC_LDPC; | |
1442 | ||
e8324357 S |
1443 | return flags; |
1444 | } | |
1445 | ||
1446 | /* | |
1447 | * rix - rate index | |
1448 | * pktlen - total bytes (delims + data + fcs + pads + pad delims) | |
1449 | * width - 0 for 20 MHz, 1 for 40 MHz | |
1450 | * half_gi - to use 4us v/s 3.6 us for symbol time | |
1451 | */ | |
1452 | static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, struct ath_buf *bf, | |
1453 | int width, int half_gi, bool shortPreamble) | |
1454 | { | |
e8324357 | 1455 | u32 nbits, nsymbits, duration, nsymbols; |
e8324357 S |
1456 | int streams, pktlen; |
1457 | ||
1458 | pktlen = bf_isaggr(bf) ? bf->bf_al : bf->bf_frmlen; | |
e8324357 S |
1459 | |
1460 | /* find number of symbols: PLCP + data */ | |
c6663876 | 1461 | streams = HT_RC_2_STREAMS(rix); |
e8324357 | 1462 | nbits = (pktlen << 3) + OFDM_PLCP_BITS; |
c6663876 | 1463 | nsymbits = bits_per_symbol[rix % 8][width] * streams; |
e8324357 S |
1464 | nsymbols = (nbits + nsymbits - 1) / nsymbits; |
1465 | ||
1466 | if (!half_gi) | |
1467 | duration = SYMBOL_TIME(nsymbols); | |
1468 | else | |
1469 | duration = SYMBOL_TIME_HALFGI(nsymbols); | |
1470 | ||
1471 | /* addup duration for legacy/ht training and signal fields */ | |
e8324357 S |
1472 | duration += L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams); |
1473 | ||
1474 | return duration; | |
1475 | } | |
1476 | ||
1477 | static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf) | |
1478 | { | |
43c27613 | 1479 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
e8324357 S |
1480 | struct ath9k_11n_rate_series series[4]; |
1481 | struct sk_buff *skb; | |
1482 | struct ieee80211_tx_info *tx_info; | |
1483 | struct ieee80211_tx_rate *rates; | |
545750d3 | 1484 | const struct ieee80211_rate *rate; |
254ad0ff | 1485 | struct ieee80211_hdr *hdr; |
c89424df S |
1486 | int i, flags = 0; |
1487 | u8 rix = 0, ctsrate = 0; | |
254ad0ff | 1488 | bool is_pspoll; |
e8324357 S |
1489 | |
1490 | memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4); | |
1491 | ||
a22be22a | 1492 | skb = bf->bf_mpdu; |
e8324357 S |
1493 | tx_info = IEEE80211_SKB_CB(skb); |
1494 | rates = tx_info->control.rates; | |
254ad0ff S |
1495 | hdr = (struct ieee80211_hdr *)skb->data; |
1496 | is_pspoll = ieee80211_is_pspoll(hdr->frame_control); | |
e8324357 | 1497 | |
e8324357 | 1498 | /* |
c89424df S |
1499 | * We check if Short Preamble is needed for the CTS rate by |
1500 | * checking the BSS's global flag. | |
1501 | * But for the rate series, IEEE80211_TX_RC_USE_SHORT_PREAMBLE is used. | |
e8324357 | 1502 | */ |
545750d3 FF |
1503 | rate = ieee80211_get_rts_cts_rate(sc->hw, tx_info); |
1504 | ctsrate = rate->hw_value; | |
c89424df | 1505 | if (sc->sc_flags & SC_OP_PREAMBLE_SHORT) |
545750d3 | 1506 | ctsrate |= rate->hw_value_short; |
e8324357 | 1507 | |
e8324357 | 1508 | for (i = 0; i < 4; i++) { |
545750d3 FF |
1509 | bool is_40, is_sgi, is_sp; |
1510 | int phy; | |
1511 | ||
e8324357 S |
1512 | if (!rates[i].count || (rates[i].idx < 0)) |
1513 | continue; | |
1514 | ||
1515 | rix = rates[i].idx; | |
e8324357 | 1516 | series[i].Tries = rates[i].count; |
43c27613 | 1517 | series[i].ChSel = common->tx_chainmask; |
e8324357 | 1518 | |
27032059 FF |
1519 | if ((sc->config.ath_aggr_prot && bf_isaggr(bf)) || |
1520 | (rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS)) { | |
c89424df | 1521 | series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; |
27032059 FF |
1522 | flags |= ATH9K_TXDESC_RTSENA; |
1523 | } else if (rates[i].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { | |
1524 | series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; | |
1525 | flags |= ATH9K_TXDESC_CTSENA; | |
1526 | } | |
1527 | ||
c89424df S |
1528 | if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) |
1529 | series[i].RateFlags |= ATH9K_RATESERIES_2040; | |
1530 | if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI) | |
1531 | series[i].RateFlags |= ATH9K_RATESERIES_HALFGI; | |
e8324357 | 1532 | |
545750d3 FF |
1533 | is_sgi = !!(rates[i].flags & IEEE80211_TX_RC_SHORT_GI); |
1534 | is_40 = !!(rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH); | |
1535 | is_sp = !!(rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE); | |
1536 | ||
1537 | if (rates[i].flags & IEEE80211_TX_RC_MCS) { | |
1538 | /* MCS rates */ | |
1539 | series[i].Rate = rix | 0x80; | |
1540 | series[i].PktDuration = ath_pkt_duration(sc, rix, bf, | |
1541 | is_40, is_sgi, is_sp); | |
074a8c0d FF |
1542 | if (rix < 8 && (tx_info->flags & IEEE80211_TX_CTL_STBC)) |
1543 | series[i].RateFlags |= ATH9K_RATESERIES_STBC; | |
545750d3 FF |
1544 | continue; |
1545 | } | |
1546 | ||
1547 | /* legcay rates */ | |
1548 | if ((tx_info->band == IEEE80211_BAND_2GHZ) && | |
1549 | !(rate->flags & IEEE80211_RATE_ERP_G)) | |
1550 | phy = WLAN_RC_PHY_CCK; | |
1551 | else | |
1552 | phy = WLAN_RC_PHY_OFDM; | |
1553 | ||
1554 | rate = &sc->sbands[tx_info->band].bitrates[rates[i].idx]; | |
1555 | series[i].Rate = rate->hw_value; | |
1556 | if (rate->hw_value_short) { | |
1557 | if (rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) | |
1558 | series[i].Rate |= rate->hw_value_short; | |
1559 | } else { | |
1560 | is_sp = false; | |
1561 | } | |
1562 | ||
1563 | series[i].PktDuration = ath9k_hw_computetxtime(sc->sc_ah, | |
1564 | phy, rate->bitrate * 100, bf->bf_frmlen, rix, is_sp); | |
f078f209 LR |
1565 | } |
1566 | ||
27032059 FF |
1567 | /* For AR5416 - RTS cannot be followed by a frame larger than 8K */ |
1568 | if (bf_isaggr(bf) && (bf->bf_al > sc->sc_ah->caps.rts_aggr_limit)) | |
1569 | flags &= ~ATH9K_TXDESC_RTSENA; | |
1570 | ||
1571 | /* ATH9K_TXDESC_RTSENA and ATH9K_TXDESC_CTSENA are mutually exclusive. */ | |
1572 | if (flags & ATH9K_TXDESC_RTSENA) | |
1573 | flags &= ~ATH9K_TXDESC_CTSENA; | |
1574 | ||
e8324357 | 1575 | /* set dur_update_en for l-sig computation except for PS-Poll frames */ |
c89424df S |
1576 | ath9k_hw_set11n_ratescenario(sc->sc_ah, bf->bf_desc, |
1577 | bf->bf_lastbf->bf_desc, | |
254ad0ff | 1578 | !is_pspoll, ctsrate, |
c89424df | 1579 | 0, series, 4, flags); |
f078f209 | 1580 | |
17d7904d | 1581 | if (sc->config.ath_aggr_prot && flags) |
c89424df | 1582 | ath9k_hw_set11n_burstduration(sc->sc_ah, bf->bf_desc, 8192); |
f078f209 LR |
1583 | } |
1584 | ||
c52f33d0 | 1585 | static int ath_tx_setup_buffer(struct ieee80211_hw *hw, struct ath_buf *bf, |
8f93b8b3 | 1586 | struct sk_buff *skb, |
528f0c6b | 1587 | struct ath_tx_control *txctl) |
f078f209 | 1588 | { |
c52f33d0 JM |
1589 | struct ath_wiphy *aphy = hw->priv; |
1590 | struct ath_softc *sc = aphy->sc; | |
528f0c6b S |
1591 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
1592 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
528f0c6b S |
1593 | int hdrlen; |
1594 | __le16 fc; | |
1bc14880 | 1595 | int padpos, padsize; |
b0a33448 | 1596 | bool use_ldpc = false; |
e022edbd | 1597 | |
827e69bf FF |
1598 | tx_info->pad[0] = 0; |
1599 | switch (txctl->frame_type) { | |
c81494d5 | 1600 | case ATH9K_IFT_NOT_INTERNAL: |
827e69bf | 1601 | break; |
c81494d5 | 1602 | case ATH9K_IFT_PAUSE: |
827e69bf FF |
1603 | tx_info->pad[0] |= ATH_TX_INFO_FRAME_TYPE_PAUSE; |
1604 | /* fall through */ | |
c81494d5 | 1605 | case ATH9K_IFT_UNPAUSE: |
827e69bf FF |
1606 | tx_info->pad[0] |= ATH_TX_INFO_FRAME_TYPE_INTERNAL; |
1607 | break; | |
1608 | } | |
528f0c6b S |
1609 | hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
1610 | fc = hdr->frame_control; | |
f078f209 | 1611 | |
528f0c6b | 1612 | ATH_TXBUF_RESET(bf); |
f078f209 | 1613 | |
827e69bf | 1614 | bf->aphy = aphy; |
1bc14880 BP |
1615 | bf->bf_frmlen = skb->len + FCS_LEN; |
1616 | /* Remove the padding size from bf_frmlen, if any */ | |
1617 | padpos = ath9k_cmn_padpos(hdr->frame_control); | |
1618 | padsize = padpos & 3; | |
1619 | if (padsize && skb->len>padpos+padsize) { | |
1620 | bf->bf_frmlen -= padsize; | |
1621 | } | |
cd3d39a6 | 1622 | |
9f42c2b6 | 1623 | if (!txctl->paprd && conf_is_ht(&hw->conf)) { |
c656bbb5 | 1624 | bf->bf_state.bf_type |= BUF_HT; |
b0a33448 LR |
1625 | if (tx_info->flags & IEEE80211_TX_CTL_LDPC) |
1626 | use_ldpc = true; | |
1627 | } | |
528f0c6b | 1628 | |
9f42c2b6 | 1629 | bf->bf_state.bfs_paprd = txctl->paprd; |
ca369eb4 VT |
1630 | if (txctl->paprd) |
1631 | bf->bf_state.bfs_paprd_timestamp = jiffies; | |
b0a33448 | 1632 | bf->bf_flags = setup_tx_flags(skb, use_ldpc); |
528f0c6b | 1633 | |
c17512d8 | 1634 | bf->bf_keytype = ath9k_cmn_get_hw_crypto_keytype(skb); |
528f0c6b S |
1635 | if (bf->bf_keytype != ATH9K_KEY_TYPE_CLEAR) { |
1636 | bf->bf_frmlen += tx_info->control.hw_key->icv_len; | |
1637 | bf->bf_keyix = tx_info->control.hw_key->hw_key_idx; | |
1638 | } else { | |
1639 | bf->bf_keyix = ATH9K_TXKEYIX_INVALID; | |
1640 | } | |
1641 | ||
17b182e3 S |
1642 | if (ieee80211_is_data_qos(fc) && bf_isht(bf) && |
1643 | (sc->sc_flags & SC_OP_TXAGGR)) | |
528f0c6b S |
1644 | assign_aggr_tid_seqno(skb, bf); |
1645 | ||
f078f209 | 1646 | bf->bf_mpdu = skb; |
f8316df1 | 1647 | |
c1739eb3 BG |
1648 | bf->bf_buf_addr = dma_map_single(sc->dev, skb->data, |
1649 | skb->len, DMA_TO_DEVICE); | |
1650 | if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) { | |
f8316df1 | 1651 | bf->bf_mpdu = NULL; |
6cf9e995 | 1652 | bf->bf_buf_addr = 0; |
c46917bb LR |
1653 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL, |
1654 | "dma_mapping_error() on TX\n"); | |
f8316df1 LR |
1655 | return -ENOMEM; |
1656 | } | |
1657 | ||
7c9fd60f VT |
1658 | bf->bf_tx_aborted = false; |
1659 | ||
f8316df1 | 1660 | return 0; |
528f0c6b S |
1661 | } |
1662 | ||
1663 | /* FIXME: tx power */ | |
1664 | static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf, | |
528f0c6b S |
1665 | struct ath_tx_control *txctl) |
1666 | { | |
a22be22a | 1667 | struct sk_buff *skb = bf->bf_mpdu; |
528f0c6b | 1668 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
c37452b0 | 1669 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
528f0c6b S |
1670 | struct ath_node *an = NULL; |
1671 | struct list_head bf_head; | |
1672 | struct ath_desc *ds; | |
1673 | struct ath_atx_tid *tid; | |
cbe61d8a | 1674 | struct ath_hw *ah = sc->sc_ah; |
528f0c6b | 1675 | int frm_type; |
c37452b0 | 1676 | __le16 fc; |
528f0c6b | 1677 | |
528f0c6b | 1678 | frm_type = get_hw_packet_type(skb); |
c37452b0 | 1679 | fc = hdr->frame_control; |
528f0c6b S |
1680 | |
1681 | INIT_LIST_HEAD(&bf_head); | |
1682 | list_add_tail(&bf->list, &bf_head); | |
f078f209 | 1683 | |
f078f209 | 1684 | ds = bf->bf_desc; |
87d5efbb | 1685 | ath9k_hw_set_desc_link(ah, ds, 0); |
f078f209 | 1686 | |
528f0c6b S |
1687 | ath9k_hw_set11n_txdesc(ah, ds, bf->bf_frmlen, frm_type, MAX_RATE_POWER, |
1688 | bf->bf_keyix, bf->bf_keytype, bf->bf_flags); | |
1689 | ||
1690 | ath9k_hw_filltxdesc(ah, ds, | |
8f93b8b3 S |
1691 | skb->len, /* segment length */ |
1692 | true, /* first segment */ | |
1693 | true, /* last segment */ | |
3f3a1c80 | 1694 | ds, /* first descriptor */ |
cc610ac0 VT |
1695 | bf->bf_buf_addr, |
1696 | txctl->txq->axq_qnum); | |
f078f209 | 1697 | |
9f42c2b6 FF |
1698 | if (bf->bf_state.bfs_paprd) |
1699 | ar9003_hw_set_paprd_txdesc(ah, ds, bf->bf_state.bfs_paprd); | |
1700 | ||
528f0c6b | 1701 | spin_lock_bh(&txctl->txq->axq_lock); |
f078f209 | 1702 | |
f1617967 JL |
1703 | if (bf_isht(bf) && (sc->sc_flags & SC_OP_TXAGGR) && |
1704 | tx_info->control.sta) { | |
1705 | an = (struct ath_node *)tx_info->control.sta->drv_priv; | |
1706 | tid = ATH_AN_2_TID(an, bf->bf_tidno); | |
1707 | ||
c37452b0 S |
1708 | if (!ieee80211_is_data_qos(fc)) { |
1709 | ath_tx_send_normal(sc, txctl->txq, &bf_head); | |
1710 | goto tx_done; | |
1711 | } | |
1712 | ||
4fdec031 | 1713 | if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) { |
f078f209 LR |
1714 | /* |
1715 | * Try aggregation if it's a unicast data frame | |
1716 | * and the destination is HT capable. | |
1717 | */ | |
528f0c6b | 1718 | ath_tx_send_ampdu(sc, tid, &bf_head, txctl); |
f078f209 LR |
1719 | } else { |
1720 | /* | |
528f0c6b S |
1721 | * Send this frame as regular when ADDBA |
1722 | * exchange is neither complete nor pending. | |
f078f209 | 1723 | */ |
c37452b0 S |
1724 | ath_tx_send_ht_normal(sc, txctl->txq, |
1725 | tid, &bf_head); | |
f078f209 LR |
1726 | } |
1727 | } else { | |
c37452b0 | 1728 | ath_tx_send_normal(sc, txctl->txq, &bf_head); |
f078f209 | 1729 | } |
528f0c6b | 1730 | |
c37452b0 | 1731 | tx_done: |
528f0c6b | 1732 | spin_unlock_bh(&txctl->txq->axq_lock); |
f078f209 LR |
1733 | } |
1734 | ||
f8316df1 | 1735 | /* Upon failure caller should free skb */ |
c52f33d0 | 1736 | int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb, |
528f0c6b | 1737 | struct ath_tx_control *txctl) |
f078f209 | 1738 | { |
c52f33d0 JM |
1739 | struct ath_wiphy *aphy = hw->priv; |
1740 | struct ath_softc *sc = aphy->sc; | |
c46917bb | 1741 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
84642d6b | 1742 | struct ath_txq *txq = txctl->txq; |
528f0c6b | 1743 | struct ath_buf *bf; |
97923b14 | 1744 | int q, r; |
f078f209 | 1745 | |
528f0c6b S |
1746 | bf = ath_tx_get_buffer(sc); |
1747 | if (!bf) { | |
c46917bb | 1748 | ath_print(common, ATH_DBG_XMIT, "TX buffers are full\n"); |
528f0c6b S |
1749 | return -1; |
1750 | } | |
1751 | ||
c52f33d0 | 1752 | r = ath_tx_setup_buffer(hw, bf, skb, txctl); |
f8316df1 | 1753 | if (unlikely(r)) { |
c46917bb | 1754 | ath_print(common, ATH_DBG_FATAL, "TX mem alloc failure\n"); |
c112d0c5 LR |
1755 | |
1756 | /* upon ath_tx_processq() this TX queue will be resumed, we | |
1757 | * guarantee this will happen by knowing beforehand that | |
1758 | * we will at least have to run TX completionon one buffer | |
1759 | * on the queue */ | |
1760 | spin_lock_bh(&txq->axq_lock); | |
84642d6b | 1761 | if (!txq->stopped && txq->axq_depth > 1) { |
f52de03b | 1762 | ath_mac80211_stop_queue(sc, skb_get_queue_mapping(skb)); |
c112d0c5 LR |
1763 | txq->stopped = 1; |
1764 | } | |
1765 | spin_unlock_bh(&txq->axq_lock); | |
1766 | ||
0a8cea84 | 1767 | ath_tx_return_buffer(sc, bf); |
c112d0c5 | 1768 | |
f8316df1 LR |
1769 | return r; |
1770 | } | |
1771 | ||
97923b14 FF |
1772 | q = skb_get_queue_mapping(skb); |
1773 | if (q >= 4) | |
1774 | q = 0; | |
1775 | ||
1776 | spin_lock_bh(&txq->axq_lock); | |
1777 | if (++sc->tx.pending_frames[q] > ATH_MAX_QDEPTH && !txq->stopped) { | |
1778 | ath_mac80211_stop_queue(sc, skb_get_queue_mapping(skb)); | |
1779 | txq->stopped = 1; | |
1780 | } | |
1781 | spin_unlock_bh(&txq->axq_lock); | |
1782 | ||
8f93b8b3 | 1783 | ath_tx_start_dma(sc, bf, txctl); |
f078f209 | 1784 | |
528f0c6b | 1785 | return 0; |
f078f209 LR |
1786 | } |
1787 | ||
c52f33d0 | 1788 | void ath_tx_cabq(struct ieee80211_hw *hw, struct sk_buff *skb) |
f078f209 | 1789 | { |
c52f33d0 JM |
1790 | struct ath_wiphy *aphy = hw->priv; |
1791 | struct ath_softc *sc = aphy->sc; | |
c46917bb | 1792 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
4d91f9f3 BP |
1793 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
1794 | int padpos, padsize; | |
e8324357 S |
1795 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
1796 | struct ath_tx_control txctl; | |
f078f209 | 1797 | |
e8324357 | 1798 | memset(&txctl, 0, sizeof(struct ath_tx_control)); |
f078f209 LR |
1799 | |
1800 | /* | |
e8324357 S |
1801 | * As a temporary workaround, assign seq# here; this will likely need |
1802 | * to be cleaned up to work better with Beacon transmission and virtual | |
1803 | * BSSes. | |
f078f209 | 1804 | */ |
e8324357 | 1805 | if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { |
e8324357 S |
1806 | if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) |
1807 | sc->tx.seq_no += 0x10; | |
1808 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); | |
1809 | hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no); | |
f078f209 | 1810 | } |
f078f209 | 1811 | |
e8324357 | 1812 | /* Add the padding after the header if this is not already done */ |
4d91f9f3 BP |
1813 | padpos = ath9k_cmn_padpos(hdr->frame_control); |
1814 | padsize = padpos & 3; | |
1815 | if (padsize && skb->len>padpos) { | |
e8324357 | 1816 | if (skb_headroom(skb) < padsize) { |
c46917bb LR |
1817 | ath_print(common, ATH_DBG_XMIT, |
1818 | "TX CABQ padding failed\n"); | |
e8324357 S |
1819 | dev_kfree_skb_any(skb); |
1820 | return; | |
1821 | } | |
1822 | skb_push(skb, padsize); | |
4d91f9f3 | 1823 | memmove(skb->data, skb->data + padsize, padpos); |
f078f209 | 1824 | } |
f078f209 | 1825 | |
e8324357 | 1826 | txctl.txq = sc->beacon.cabq; |
f078f209 | 1827 | |
c46917bb LR |
1828 | ath_print(common, ATH_DBG_XMIT, |
1829 | "transmitting CABQ packet, skb: %p\n", skb); | |
f078f209 | 1830 | |
c52f33d0 | 1831 | if (ath_tx_start(hw, skb, &txctl) != 0) { |
c46917bb | 1832 | ath_print(common, ATH_DBG_XMIT, "CABQ TX failed\n"); |
e8324357 | 1833 | goto exit; |
f078f209 | 1834 | } |
f078f209 | 1835 | |
e8324357 S |
1836 | return; |
1837 | exit: | |
1838 | dev_kfree_skb_any(skb); | |
f078f209 LR |
1839 | } |
1840 | ||
e8324357 S |
1841 | /*****************/ |
1842 | /* TX Completion */ | |
1843 | /*****************/ | |
528f0c6b | 1844 | |
e8324357 | 1845 | static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb, |
827e69bf | 1846 | struct ath_wiphy *aphy, int tx_flags) |
528f0c6b | 1847 | { |
e8324357 S |
1848 | struct ieee80211_hw *hw = sc->hw; |
1849 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); | |
c46917bb | 1850 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
4d91f9f3 | 1851 | struct ieee80211_hdr * hdr = (struct ieee80211_hdr *)skb->data; |
97923b14 | 1852 | int q, padpos, padsize; |
528f0c6b | 1853 | |
c46917bb | 1854 | ath_print(common, ATH_DBG_XMIT, "TX complete: skb: %p\n", skb); |
528f0c6b | 1855 | |
827e69bf FF |
1856 | if (aphy) |
1857 | hw = aphy->hw; | |
528f0c6b | 1858 | |
6b2c4032 | 1859 | if (tx_flags & ATH_TX_BAR) |
e8324357 | 1860 | tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; |
e8324357 | 1861 | |
6b2c4032 | 1862 | if (!(tx_flags & (ATH_TX_ERROR | ATH_TX_XRETRY))) { |
e8324357 S |
1863 | /* Frame was ACKed */ |
1864 | tx_info->flags |= IEEE80211_TX_STAT_ACK; | |
528f0c6b S |
1865 | } |
1866 | ||
4d91f9f3 BP |
1867 | padpos = ath9k_cmn_padpos(hdr->frame_control); |
1868 | padsize = padpos & 3; | |
1869 | if (padsize && skb->len>padpos+padsize) { | |
e8324357 S |
1870 | /* |
1871 | * Remove MAC header padding before giving the frame back to | |
1872 | * mac80211. | |
1873 | */ | |
4d91f9f3 | 1874 | memmove(skb->data + padsize, skb->data, padpos); |
e8324357 S |
1875 | skb_pull(skb, padsize); |
1876 | } | |
528f0c6b | 1877 | |
1b04b930 S |
1878 | if (sc->ps_flags & PS_WAIT_FOR_TX_ACK) { |
1879 | sc->ps_flags &= ~PS_WAIT_FOR_TX_ACK; | |
c46917bb LR |
1880 | ath_print(common, ATH_DBG_PS, |
1881 | "Going back to sleep after having " | |
f643e51d | 1882 | "received TX status (0x%lx)\n", |
1b04b930 S |
1883 | sc->ps_flags & (PS_WAIT_FOR_BEACON | |
1884 | PS_WAIT_FOR_CAB | | |
1885 | PS_WAIT_FOR_PSPOLL_DATA | | |
1886 | PS_WAIT_FOR_TX_ACK)); | |
9a23f9ca JM |
1887 | } |
1888 | ||
827e69bf | 1889 | if (unlikely(tx_info->pad[0] & ATH_TX_INFO_FRAME_TYPE_INTERNAL)) |
f0ed85c6 | 1890 | ath9k_tx_status(hw, skb); |
97923b14 FF |
1891 | else { |
1892 | q = skb_get_queue_mapping(skb); | |
1893 | if (q >= 4) | |
1894 | q = 0; | |
1895 | ||
1896 | if (--sc->tx.pending_frames[q] < 0) | |
1897 | sc->tx.pending_frames[q] = 0; | |
1898 | ||
827e69bf | 1899 | ieee80211_tx_status(hw, skb); |
97923b14 | 1900 | } |
e8324357 | 1901 | } |
f078f209 | 1902 | |
e8324357 | 1903 | static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, |
db1a052b FF |
1904 | struct ath_txq *txq, struct list_head *bf_q, |
1905 | struct ath_tx_status *ts, int txok, int sendbar) | |
f078f209 | 1906 | { |
e8324357 | 1907 | struct sk_buff *skb = bf->bf_mpdu; |
e8324357 | 1908 | unsigned long flags; |
6b2c4032 | 1909 | int tx_flags = 0; |
f078f209 | 1910 | |
e8324357 | 1911 | if (sendbar) |
6b2c4032 | 1912 | tx_flags = ATH_TX_BAR; |
f078f209 | 1913 | |
e8324357 | 1914 | if (!txok) { |
6b2c4032 | 1915 | tx_flags |= ATH_TX_ERROR; |
f078f209 | 1916 | |
e8324357 | 1917 | if (bf_isxretried(bf)) |
6b2c4032 | 1918 | tx_flags |= ATH_TX_XRETRY; |
f078f209 LR |
1919 | } |
1920 | ||
c1739eb3 | 1921 | dma_unmap_single(sc->dev, bf->bf_buf_addr, skb->len, DMA_TO_DEVICE); |
6cf9e995 | 1922 | bf->bf_buf_addr = 0; |
9f42c2b6 FF |
1923 | |
1924 | if (bf->bf_state.bfs_paprd) { | |
ca369eb4 VT |
1925 | if (time_after(jiffies, |
1926 | bf->bf_state.bfs_paprd_timestamp + | |
78a18172 | 1927 | msecs_to_jiffies(ATH_PAPRD_TIMEOUT))) |
ca369eb4 | 1928 | dev_kfree_skb_any(skb); |
78a18172 | 1929 | else |
ca369eb4 | 1930 | complete(&sc->paprd_complete); |
9f42c2b6 | 1931 | } else { |
9f42c2b6 | 1932 | ath_debug_stat_tx(sc, txq, bf, ts); |
c23cc81a | 1933 | ath_tx_complete(sc, skb, bf->aphy, tx_flags); |
9f42c2b6 | 1934 | } |
6cf9e995 BG |
1935 | /* At this point, skb (bf->bf_mpdu) is consumed...make sure we don't |
1936 | * accidentally reference it later. | |
1937 | */ | |
1938 | bf->bf_mpdu = NULL; | |
e8324357 S |
1939 | |
1940 | /* | |
1941 | * Return the list of ath_buf of this mpdu to free queue | |
1942 | */ | |
1943 | spin_lock_irqsave(&sc->tx.txbuflock, flags); | |
1944 | list_splice_tail_init(bf_q, &sc->tx.txbuf); | |
1945 | spin_unlock_irqrestore(&sc->tx.txbuflock, flags); | |
f078f209 LR |
1946 | } |
1947 | ||
e8324357 | 1948 | static int ath_tx_num_badfrms(struct ath_softc *sc, struct ath_buf *bf, |
db1a052b | 1949 | struct ath_tx_status *ts, int txok) |
f078f209 | 1950 | { |
e8324357 S |
1951 | u16 seq_st = 0; |
1952 | u32 ba[WME_BA_BMP_SIZE >> 5]; | |
1953 | int ba_index; | |
1954 | int nbad = 0; | |
1955 | int isaggr = 0; | |
f078f209 | 1956 | |
7c9fd60f | 1957 | if (bf->bf_lastbf->bf_tx_aborted) |
e8324357 | 1958 | return 0; |
f078f209 | 1959 | |
e8324357 S |
1960 | isaggr = bf_isaggr(bf); |
1961 | if (isaggr) { | |
db1a052b FF |
1962 | seq_st = ts->ts_seqnum; |
1963 | memcpy(ba, &ts->ba_low, WME_BA_BMP_SIZE >> 3); | |
e8324357 | 1964 | } |
f078f209 | 1965 | |
e8324357 S |
1966 | while (bf) { |
1967 | ba_index = ATH_BA_INDEX(seq_st, bf->bf_seqno); | |
1968 | if (!txok || (isaggr && !ATH_BA_ISSET(ba, ba_index))) | |
1969 | nbad++; | |
1970 | ||
1971 | bf = bf->bf_next; | |
1972 | } | |
f078f209 | 1973 | |
e8324357 S |
1974 | return nbad; |
1975 | } | |
f078f209 | 1976 | |
db1a052b | 1977 | static void ath_tx_rc_status(struct ath_buf *bf, struct ath_tx_status *ts, |
8a92e2ee | 1978 | int nbad, int txok, bool update_rc) |
f078f209 | 1979 | { |
a22be22a | 1980 | struct sk_buff *skb = bf->bf_mpdu; |
254ad0ff | 1981 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
e8324357 | 1982 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
827e69bf | 1983 | struct ieee80211_hw *hw = bf->aphy->hw; |
8a92e2ee | 1984 | u8 i, tx_rateindex; |
f078f209 | 1985 | |
95e4acb7 | 1986 | if (txok) |
db1a052b | 1987 | tx_info->status.ack_signal = ts->ts_rssi; |
95e4acb7 | 1988 | |
db1a052b | 1989 | tx_rateindex = ts->ts_rateindex; |
8a92e2ee VT |
1990 | WARN_ON(tx_rateindex >= hw->max_rates); |
1991 | ||
db1a052b | 1992 | if (ts->ts_status & ATH9K_TXERR_FILT) |
e8324357 | 1993 | tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED; |
ebd02287 | 1994 | if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && update_rc) { |
d969847c | 1995 | tx_info->flags |= IEEE80211_TX_STAT_AMPDU; |
f078f209 | 1996 | |
ebd02287 BS |
1997 | BUG_ON(nbad > bf->bf_nframes); |
1998 | ||
1999 | tx_info->status.ampdu_len = bf->bf_nframes; | |
2000 | tx_info->status.ampdu_ack_len = bf->bf_nframes - nbad; | |
2001 | } | |
2002 | ||
db1a052b | 2003 | if ((ts->ts_status & ATH9K_TXERR_FILT) == 0 && |
8a92e2ee | 2004 | (bf->bf_flags & ATH9K_TXDESC_NOACK) == 0 && update_rc) { |
254ad0ff | 2005 | if (ieee80211_is_data(hdr->frame_control)) { |
db1a052b | 2006 | if (ts->ts_flags & |
827e69bf FF |
2007 | (ATH9K_TX_DATA_UNDERRUN | ATH9K_TX_DELIM_UNDERRUN)) |
2008 | tx_info->pad[0] |= ATH_TX_INFO_UNDERRUN; | |
db1a052b FF |
2009 | if ((ts->ts_status & ATH9K_TXERR_XRETRY) || |
2010 | (ts->ts_status & ATH9K_TXERR_FIFO)) | |
827e69bf | 2011 | tx_info->pad[0] |= ATH_TX_INFO_XRETRY; |
e8324357 | 2012 | } |
f078f209 | 2013 | } |
8a92e2ee | 2014 | |
545750d3 | 2015 | for (i = tx_rateindex + 1; i < hw->max_rates; i++) { |
8a92e2ee | 2016 | tx_info->status.rates[i].count = 0; |
545750d3 FF |
2017 | tx_info->status.rates[i].idx = -1; |
2018 | } | |
8a92e2ee | 2019 | |
78c4653a | 2020 | tx_info->status.rates[tx_rateindex].count = ts->ts_longretry + 1; |
f078f209 LR |
2021 | } |
2022 | ||
059d806c S |
2023 | static void ath_wake_mac80211_queue(struct ath_softc *sc, struct ath_txq *txq) |
2024 | { | |
2025 | int qnum; | |
2026 | ||
97923b14 FF |
2027 | qnum = ath_get_mac80211_qnum(txq->axq_class, sc); |
2028 | if (qnum == -1) | |
2029 | return; | |
2030 | ||
059d806c | 2031 | spin_lock_bh(&txq->axq_lock); |
97923b14 | 2032 | if (txq->stopped && sc->tx.pending_frames[qnum] < ATH_MAX_QDEPTH) { |
68e8f2fa VT |
2033 | if (ath_mac80211_start_queue(sc, qnum)) |
2034 | txq->stopped = 0; | |
059d806c S |
2035 | } |
2036 | spin_unlock_bh(&txq->axq_lock); | |
2037 | } | |
2038 | ||
e8324357 | 2039 | static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq) |
f078f209 | 2040 | { |
cbe61d8a | 2041 | struct ath_hw *ah = sc->sc_ah; |
c46917bb | 2042 | struct ath_common *common = ath9k_hw_common(ah); |
e8324357 | 2043 | struct ath_buf *bf, *lastbf, *bf_held = NULL; |
f078f209 | 2044 | struct list_head bf_head; |
e8324357 | 2045 | struct ath_desc *ds; |
29bffa96 | 2046 | struct ath_tx_status ts; |
0934af23 | 2047 | int txok; |
e8324357 | 2048 | int status; |
f078f209 | 2049 | |
c46917bb LR |
2050 | ath_print(common, ATH_DBG_QUEUE, "tx queue %d (%x), link %p\n", |
2051 | txq->axq_qnum, ath9k_hw_gettxbuf(sc->sc_ah, txq->axq_qnum), | |
2052 | txq->axq_link); | |
f078f209 | 2053 | |
f078f209 LR |
2054 | for (;;) { |
2055 | spin_lock_bh(&txq->axq_lock); | |
f078f209 LR |
2056 | if (list_empty(&txq->axq_q)) { |
2057 | txq->axq_link = NULL; | |
f078f209 LR |
2058 | spin_unlock_bh(&txq->axq_lock); |
2059 | break; | |
2060 | } | |
f078f209 LR |
2061 | bf = list_first_entry(&txq->axq_q, struct ath_buf, list); |
2062 | ||
e8324357 S |
2063 | /* |
2064 | * There is a race condition that a BH gets scheduled | |
2065 | * after sw writes TxE and before hw re-load the last | |
2066 | * descriptor to get the newly chained one. | |
2067 | * Software must keep the last DONE descriptor as a | |
2068 | * holding descriptor - software does so by marking | |
2069 | * it with the STALE flag. | |
2070 | */ | |
2071 | bf_held = NULL; | |
a119cc49 | 2072 | if (bf->bf_stale) { |
e8324357 S |
2073 | bf_held = bf; |
2074 | if (list_is_last(&bf_held->list, &txq->axq_q)) { | |
6ef9b13d | 2075 | spin_unlock_bh(&txq->axq_lock); |
e8324357 S |
2076 | break; |
2077 | } else { | |
2078 | bf = list_entry(bf_held->list.next, | |
6ef9b13d | 2079 | struct ath_buf, list); |
e8324357 | 2080 | } |
f078f209 LR |
2081 | } |
2082 | ||
2083 | lastbf = bf->bf_lastbf; | |
e8324357 | 2084 | ds = lastbf->bf_desc; |
f078f209 | 2085 | |
29bffa96 FF |
2086 | memset(&ts, 0, sizeof(ts)); |
2087 | status = ath9k_hw_txprocdesc(ah, ds, &ts); | |
e8324357 | 2088 | if (status == -EINPROGRESS) { |
f078f209 | 2089 | spin_unlock_bh(&txq->axq_lock); |
e8324357 | 2090 | break; |
f078f209 | 2091 | } |
f078f209 | 2092 | |
e8324357 S |
2093 | /* |
2094 | * Remove ath_buf's of the same transmit unit from txq, | |
2095 | * however leave the last descriptor back as the holding | |
2096 | * descriptor for hw. | |
2097 | */ | |
a119cc49 | 2098 | lastbf->bf_stale = true; |
e8324357 | 2099 | INIT_LIST_HEAD(&bf_head); |
e8324357 S |
2100 | if (!list_is_singular(&lastbf->list)) |
2101 | list_cut_position(&bf_head, | |
2102 | &txq->axq_q, lastbf->list.prev); | |
f078f209 | 2103 | |
e8324357 | 2104 | txq->axq_depth--; |
29bffa96 | 2105 | txok = !(ts.ts_status & ATH9K_TXERR_MASK); |
164ace38 | 2106 | txq->axq_tx_inprogress = false; |
0a8cea84 FF |
2107 | if (bf_held) |
2108 | list_del(&bf_held->list); | |
e8324357 | 2109 | spin_unlock_bh(&txq->axq_lock); |
f078f209 | 2110 | |
0a8cea84 FF |
2111 | if (bf_held) |
2112 | ath_tx_return_buffer(sc, bf_held); | |
f078f209 | 2113 | |
e8324357 S |
2114 | if (!bf_isampdu(bf)) { |
2115 | /* | |
2116 | * This frame is sent out as a single frame. | |
2117 | * Use hardware retry status for this frame. | |
2118 | */ | |
29bffa96 | 2119 | if (ts.ts_status & ATH9K_TXERR_XRETRY) |
e8324357 | 2120 | bf->bf_state.bf_type |= BUF_XRETRY; |
ebd02287 | 2121 | ath_tx_rc_status(bf, &ts, txok ? 0 : 1, txok, true); |
e8324357 | 2122 | } |
f078f209 | 2123 | |
e8324357 | 2124 | if (bf_isampdu(bf)) |
29bffa96 | 2125 | ath_tx_complete_aggr(sc, txq, bf, &bf_head, &ts, txok); |
e8324357 | 2126 | else |
29bffa96 | 2127 | ath_tx_complete_buf(sc, bf, txq, &bf_head, &ts, txok, 0); |
8469cdef | 2128 | |
059d806c | 2129 | ath_wake_mac80211_queue(sc, txq); |
8469cdef | 2130 | |
059d806c | 2131 | spin_lock_bh(&txq->axq_lock); |
e8324357 S |
2132 | if (sc->sc_flags & SC_OP_TXAGGR) |
2133 | ath_txq_schedule(sc, txq); | |
2134 | spin_unlock_bh(&txq->axq_lock); | |
8469cdef S |
2135 | } |
2136 | } | |
2137 | ||
305fe47f | 2138 | static void ath_tx_complete_poll_work(struct work_struct *work) |
164ace38 SB |
2139 | { |
2140 | struct ath_softc *sc = container_of(work, struct ath_softc, | |
2141 | tx_complete_work.work); | |
2142 | struct ath_txq *txq; | |
2143 | int i; | |
2144 | bool needreset = false; | |
2145 | ||
2146 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) | |
2147 | if (ATH_TXQ_SETUP(sc, i)) { | |
2148 | txq = &sc->tx.txq[i]; | |
2149 | spin_lock_bh(&txq->axq_lock); | |
2150 | if (txq->axq_depth) { | |
2151 | if (txq->axq_tx_inprogress) { | |
2152 | needreset = true; | |
2153 | spin_unlock_bh(&txq->axq_lock); | |
2154 | break; | |
2155 | } else { | |
2156 | txq->axq_tx_inprogress = true; | |
2157 | } | |
2158 | } | |
2159 | spin_unlock_bh(&txq->axq_lock); | |
2160 | } | |
2161 | ||
2162 | if (needreset) { | |
c46917bb LR |
2163 | ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_RESET, |
2164 | "tx hung, resetting the chip\n"); | |
332c5566 | 2165 | ath9k_ps_wakeup(sc); |
fac6b6a0 | 2166 | ath_reset(sc, true); |
332c5566 | 2167 | ath9k_ps_restore(sc); |
164ace38 SB |
2168 | } |
2169 | ||
42935eca | 2170 | ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, |
164ace38 SB |
2171 | msecs_to_jiffies(ATH_TX_COMPLETE_POLL_INT)); |
2172 | } | |
2173 | ||
2174 | ||
f078f209 | 2175 | |
e8324357 | 2176 | void ath_tx_tasklet(struct ath_softc *sc) |
f078f209 | 2177 | { |
e8324357 S |
2178 | int i; |
2179 | u32 qcumask = ((1 << ATH9K_NUM_TX_QUEUES) - 1); | |
f078f209 | 2180 | |
e8324357 | 2181 | ath9k_hw_gettxintrtxqs(sc->sc_ah, &qcumask); |
f078f209 | 2182 | |
e8324357 S |
2183 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { |
2184 | if (ATH_TXQ_SETUP(sc, i) && (qcumask & (1 << i))) | |
2185 | ath_tx_processq(sc, &sc->tx.txq[i]); | |
f078f209 LR |
2186 | } |
2187 | } | |
2188 | ||
e5003249 VT |
2189 | void ath_tx_edma_tasklet(struct ath_softc *sc) |
2190 | { | |
2191 | struct ath_tx_status txs; | |
2192 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
2193 | struct ath_hw *ah = sc->sc_ah; | |
2194 | struct ath_txq *txq; | |
2195 | struct ath_buf *bf, *lastbf; | |
2196 | struct list_head bf_head; | |
2197 | int status; | |
2198 | int txok; | |
2199 | ||
2200 | for (;;) { | |
2201 | status = ath9k_hw_txprocdesc(ah, NULL, (void *)&txs); | |
2202 | if (status == -EINPROGRESS) | |
2203 | break; | |
2204 | if (status == -EIO) { | |
2205 | ath_print(common, ATH_DBG_XMIT, | |
2206 | "Error processing tx status\n"); | |
2207 | break; | |
2208 | } | |
2209 | ||
2210 | /* Skip beacon completions */ | |
2211 | if (txs.qid == sc->beacon.beaconq) | |
2212 | continue; | |
2213 | ||
2214 | txq = &sc->tx.txq[txs.qid]; | |
2215 | ||
2216 | spin_lock_bh(&txq->axq_lock); | |
2217 | if (list_empty(&txq->txq_fifo[txq->txq_tailidx])) { | |
2218 | spin_unlock_bh(&txq->axq_lock); | |
2219 | return; | |
2220 | } | |
2221 | ||
2222 | bf = list_first_entry(&txq->txq_fifo[txq->txq_tailidx], | |
2223 | struct ath_buf, list); | |
2224 | lastbf = bf->bf_lastbf; | |
2225 | ||
2226 | INIT_LIST_HEAD(&bf_head); | |
2227 | list_cut_position(&bf_head, &txq->txq_fifo[txq->txq_tailidx], | |
2228 | &lastbf->list); | |
2229 | INCR(txq->txq_tailidx, ATH_TXFIFO_DEPTH); | |
2230 | txq->axq_depth--; | |
2231 | txq->axq_tx_inprogress = false; | |
2232 | spin_unlock_bh(&txq->axq_lock); | |
2233 | ||
2234 | txok = !(txs.ts_status & ATH9K_TXERR_MASK); | |
2235 | ||
2236 | if (!bf_isampdu(bf)) { | |
e5003249 VT |
2237 | if (txs.ts_status & ATH9K_TXERR_XRETRY) |
2238 | bf->bf_state.bf_type |= BUF_XRETRY; | |
ebd02287 | 2239 | ath_tx_rc_status(bf, &txs, txok ? 0 : 1, txok, true); |
e5003249 VT |
2240 | } |
2241 | ||
2242 | if (bf_isampdu(bf)) | |
2243 | ath_tx_complete_aggr(sc, txq, bf, &bf_head, &txs, txok); | |
2244 | else | |
2245 | ath_tx_complete_buf(sc, bf, txq, &bf_head, | |
2246 | &txs, txok, 0); | |
2247 | ||
7f9f3600 FF |
2248 | ath_wake_mac80211_queue(sc, txq); |
2249 | ||
e5003249 VT |
2250 | spin_lock_bh(&txq->axq_lock); |
2251 | if (!list_empty(&txq->txq_fifo_pending)) { | |
2252 | INIT_LIST_HEAD(&bf_head); | |
2253 | bf = list_first_entry(&txq->txq_fifo_pending, | |
2254 | struct ath_buf, list); | |
2255 | list_cut_position(&bf_head, &txq->txq_fifo_pending, | |
2256 | &bf->bf_lastbf->list); | |
2257 | ath_tx_txqaddbuf(sc, txq, &bf_head); | |
2258 | } else if (sc->sc_flags & SC_OP_TXAGGR) | |
2259 | ath_txq_schedule(sc, txq); | |
2260 | spin_unlock_bh(&txq->axq_lock); | |
2261 | } | |
2262 | } | |
2263 | ||
e8324357 S |
2264 | /*****************/ |
2265 | /* Init, Cleanup */ | |
2266 | /*****************/ | |
f078f209 | 2267 | |
5088c2f1 VT |
2268 | static int ath_txstatus_setup(struct ath_softc *sc, int size) |
2269 | { | |
2270 | struct ath_descdma *dd = &sc->txsdma; | |
2271 | u8 txs_len = sc->sc_ah->caps.txs_len; | |
2272 | ||
2273 | dd->dd_desc_len = size * txs_len; | |
2274 | dd->dd_desc = dma_alloc_coherent(sc->dev, dd->dd_desc_len, | |
2275 | &dd->dd_desc_paddr, GFP_KERNEL); | |
2276 | if (!dd->dd_desc) | |
2277 | return -ENOMEM; | |
2278 | ||
2279 | return 0; | |
2280 | } | |
2281 | ||
2282 | static int ath_tx_edma_init(struct ath_softc *sc) | |
2283 | { | |
2284 | int err; | |
2285 | ||
2286 | err = ath_txstatus_setup(sc, ATH_TXSTATUS_RING_SIZE); | |
2287 | if (!err) | |
2288 | ath9k_hw_setup_statusring(sc->sc_ah, sc->txsdma.dd_desc, | |
2289 | sc->txsdma.dd_desc_paddr, | |
2290 | ATH_TXSTATUS_RING_SIZE); | |
2291 | ||
2292 | return err; | |
2293 | } | |
2294 | ||
2295 | static void ath_tx_edma_cleanup(struct ath_softc *sc) | |
2296 | { | |
2297 | struct ath_descdma *dd = &sc->txsdma; | |
2298 | ||
2299 | dma_free_coherent(sc->dev, dd->dd_desc_len, dd->dd_desc, | |
2300 | dd->dd_desc_paddr); | |
2301 | } | |
2302 | ||
e8324357 | 2303 | int ath_tx_init(struct ath_softc *sc, int nbufs) |
f078f209 | 2304 | { |
c46917bb | 2305 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); |
e8324357 | 2306 | int error = 0; |
f078f209 | 2307 | |
797fe5cb | 2308 | spin_lock_init(&sc->tx.txbuflock); |
f078f209 | 2309 | |
797fe5cb | 2310 | error = ath_descdma_setup(sc, &sc->tx.txdma, &sc->tx.txbuf, |
4adfcded | 2311 | "tx", nbufs, 1, 1); |
797fe5cb | 2312 | if (error != 0) { |
c46917bb LR |
2313 | ath_print(common, ATH_DBG_FATAL, |
2314 | "Failed to allocate tx descriptors: %d\n", error); | |
797fe5cb S |
2315 | goto err; |
2316 | } | |
f078f209 | 2317 | |
797fe5cb | 2318 | error = ath_descdma_setup(sc, &sc->beacon.bdma, &sc->beacon.bbuf, |
5088c2f1 | 2319 | "beacon", ATH_BCBUF, 1, 1); |
797fe5cb | 2320 | if (error != 0) { |
c46917bb LR |
2321 | ath_print(common, ATH_DBG_FATAL, |
2322 | "Failed to allocate beacon descriptors: %d\n", error); | |
797fe5cb S |
2323 | goto err; |
2324 | } | |
f078f209 | 2325 | |
164ace38 SB |
2326 | INIT_DELAYED_WORK(&sc->tx_complete_work, ath_tx_complete_poll_work); |
2327 | ||
5088c2f1 VT |
2328 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { |
2329 | error = ath_tx_edma_init(sc); | |
2330 | if (error) | |
2331 | goto err; | |
2332 | } | |
2333 | ||
797fe5cb | 2334 | err: |
e8324357 S |
2335 | if (error != 0) |
2336 | ath_tx_cleanup(sc); | |
f078f209 | 2337 | |
e8324357 | 2338 | return error; |
f078f209 LR |
2339 | } |
2340 | ||
797fe5cb | 2341 | void ath_tx_cleanup(struct ath_softc *sc) |
e8324357 S |
2342 | { |
2343 | if (sc->beacon.bdma.dd_desc_len != 0) | |
2344 | ath_descdma_cleanup(sc, &sc->beacon.bdma, &sc->beacon.bbuf); | |
2345 | ||
2346 | if (sc->tx.txdma.dd_desc_len != 0) | |
2347 | ath_descdma_cleanup(sc, &sc->tx.txdma, &sc->tx.txbuf); | |
5088c2f1 VT |
2348 | |
2349 | if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) | |
2350 | ath_tx_edma_cleanup(sc); | |
e8324357 | 2351 | } |
f078f209 LR |
2352 | |
2353 | void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an) | |
2354 | { | |
c5170163 S |
2355 | struct ath_atx_tid *tid; |
2356 | struct ath_atx_ac *ac; | |
2357 | int tidno, acno; | |
f078f209 | 2358 | |
8ee5afbc | 2359 | for (tidno = 0, tid = &an->tid[tidno]; |
c5170163 S |
2360 | tidno < WME_NUM_TID; |
2361 | tidno++, tid++) { | |
2362 | tid->an = an; | |
2363 | tid->tidno = tidno; | |
2364 | tid->seq_start = tid->seq_next = 0; | |
2365 | tid->baw_size = WME_MAX_BA; | |
2366 | tid->baw_head = tid->baw_tail = 0; | |
2367 | tid->sched = false; | |
e8324357 | 2368 | tid->paused = false; |
a37c2c79 | 2369 | tid->state &= ~AGGR_CLEANUP; |
c5170163 | 2370 | INIT_LIST_HEAD(&tid->buf_q); |
c5170163 | 2371 | acno = TID_TO_WME_AC(tidno); |
8ee5afbc | 2372 | tid->ac = &an->ac[acno]; |
a37c2c79 S |
2373 | tid->state &= ~AGGR_ADDBA_COMPLETE; |
2374 | tid->state &= ~AGGR_ADDBA_PROGRESS; | |
c5170163 | 2375 | } |
f078f209 | 2376 | |
8ee5afbc | 2377 | for (acno = 0, ac = &an->ac[acno]; |
c5170163 S |
2378 | acno < WME_NUM_AC; acno++, ac++) { |
2379 | ac->sched = false; | |
1d2231e2 | 2380 | ac->qnum = sc->tx.hwq_map[acno]; |
c5170163 | 2381 | INIT_LIST_HEAD(&ac->tid_q); |
f078f209 LR |
2382 | } |
2383 | } | |
2384 | ||
b5aa9bf9 | 2385 | void ath_tx_node_cleanup(struct ath_softc *sc, struct ath_node *an) |
f078f209 | 2386 | { |
2b40994c FF |
2387 | struct ath_atx_ac *ac; |
2388 | struct ath_atx_tid *tid; | |
f078f209 | 2389 | struct ath_txq *txq; |
2b40994c | 2390 | int i, tidno; |
e8324357 | 2391 | |
2b40994c FF |
2392 | for (tidno = 0, tid = &an->tid[tidno]; |
2393 | tidno < WME_NUM_TID; tidno++, tid++) { | |
2394 | i = tid->ac->qnum; | |
f078f209 | 2395 | |
2b40994c FF |
2396 | if (!ATH_TXQ_SETUP(sc, i)) |
2397 | continue; | |
f078f209 | 2398 | |
2b40994c FF |
2399 | txq = &sc->tx.txq[i]; |
2400 | ac = tid->ac; | |
f078f209 | 2401 | |
2b40994c FF |
2402 | spin_lock_bh(&txq->axq_lock); |
2403 | ||
2404 | if (tid->sched) { | |
2405 | list_del(&tid->list); | |
2406 | tid->sched = false; | |
2407 | } | |
2408 | ||
2409 | if (ac->sched) { | |
2410 | list_del(&ac->list); | |
2411 | tid->ac->sched = false; | |
f078f209 | 2412 | } |
2b40994c FF |
2413 | |
2414 | ath_tid_drain(sc, txq, tid); | |
2415 | tid->state &= ~AGGR_ADDBA_COMPLETE; | |
2416 | tid->state &= ~AGGR_CLEANUP; | |
2417 | ||
2418 | spin_unlock_bh(&txq->axq_lock); | |
f078f209 LR |
2419 | } |
2420 | } |