Commit | Line | Data |
---|---|---|
f078f209 | 1 | /* |
cee075a2 | 2 | * Copyright (c) 2008-2009 Atheros Communications Inc. |
f078f209 LR |
3 | * |
4 | * Permission to use, copy, modify, and/or distribute this software for any | |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice appear in all copies. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
15 | */ | |
16 | ||
394cf0a1 | 17 | #include "ath9k.h" |
f078f209 LR |
18 | |
19 | #define BITS_PER_BYTE 8 | |
20 | #define OFDM_PLCP_BITS 22 | |
21 | #define HT_RC_2_MCS(_rc) ((_rc) & 0x0f) | |
22 | #define HT_RC_2_STREAMS(_rc) ((((_rc) & 0x78) >> 3) + 1) | |
23 | #define L_STF 8 | |
24 | #define L_LTF 8 | |
25 | #define L_SIG 4 | |
26 | #define HT_SIG 8 | |
27 | #define HT_STF 4 | |
28 | #define HT_LTF(_ns) (4 * (_ns)) | |
29 | #define SYMBOL_TIME(_ns) ((_ns) << 2) /* ns * 4 us */ | |
30 | #define SYMBOL_TIME_HALFGI(_ns) (((_ns) * 18 + 4) / 5) /* ns * 3.6 us */ | |
31 | #define NUM_SYMBOLS_PER_USEC(_usec) (_usec >> 2) | |
32 | #define NUM_SYMBOLS_PER_USEC_HALFGI(_usec) (((_usec*5)-4)/18) | |
33 | ||
34 | #define OFDM_SIFS_TIME 16 | |
35 | ||
36 | static u32 bits_per_symbol[][2] = { | |
37 | /* 20MHz 40MHz */ | |
38 | { 26, 54 }, /* 0: BPSK */ | |
39 | { 52, 108 }, /* 1: QPSK 1/2 */ | |
40 | { 78, 162 }, /* 2: QPSK 3/4 */ | |
41 | { 104, 216 }, /* 3: 16-QAM 1/2 */ | |
42 | { 156, 324 }, /* 4: 16-QAM 3/4 */ | |
43 | { 208, 432 }, /* 5: 64-QAM 2/3 */ | |
44 | { 234, 486 }, /* 6: 64-QAM 3/4 */ | |
45 | { 260, 540 }, /* 7: 64-QAM 5/6 */ | |
46 | { 52, 108 }, /* 8: BPSK */ | |
47 | { 104, 216 }, /* 9: QPSK 1/2 */ | |
48 | { 156, 324 }, /* 10: QPSK 3/4 */ | |
49 | { 208, 432 }, /* 11: 16-QAM 1/2 */ | |
50 | { 312, 648 }, /* 12: 16-QAM 3/4 */ | |
51 | { 416, 864 }, /* 13: 64-QAM 2/3 */ | |
52 | { 468, 972 }, /* 14: 64-QAM 3/4 */ | |
53 | { 520, 1080 }, /* 15: 64-QAM 5/6 */ | |
54 | }; | |
55 | ||
56 | #define IS_HT_RATE(_rate) ((_rate) & 0x80) | |
57 | ||
c37452b0 S |
58 | static void ath_tx_send_ht_normal(struct ath_softc *sc, struct ath_txq *txq, |
59 | struct ath_atx_tid *tid, | |
60 | struct list_head *bf_head); | |
e8324357 S |
61 | static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, |
62 | struct list_head *bf_q, | |
63 | int txok, int sendbar); | |
102e0572 | 64 | static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, |
e8324357 S |
65 | struct list_head *head); |
66 | static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf); | |
0934af23 VT |
67 | static int ath_tx_num_badfrms(struct ath_softc *sc, struct ath_buf *bf, |
68 | int txok); | |
69 | static void ath_tx_rc_status(struct ath_buf *bf, struct ath_desc *ds, | |
8a92e2ee | 70 | int nbad, int txok, bool update_rc); |
c4288390 | 71 | |
e8324357 S |
72 | /*********************/ |
73 | /* Aggregation logic */ | |
74 | /*********************/ | |
f078f209 | 75 | |
e8324357 | 76 | static void ath_tx_queue_tid(struct ath_txq *txq, struct ath_atx_tid *tid) |
ff37e337 | 77 | { |
e8324357 | 78 | struct ath_atx_ac *ac = tid->ac; |
ff37e337 | 79 | |
e8324357 S |
80 | if (tid->paused) |
81 | return; | |
ff37e337 | 82 | |
e8324357 S |
83 | if (tid->sched) |
84 | return; | |
ff37e337 | 85 | |
e8324357 S |
86 | tid->sched = true; |
87 | list_add_tail(&tid->list, &ac->tid_q); | |
528f0c6b | 88 | |
e8324357 S |
89 | if (ac->sched) |
90 | return; | |
f078f209 | 91 | |
e8324357 S |
92 | ac->sched = true; |
93 | list_add_tail(&ac->list, &txq->axq_acq); | |
94 | } | |
f078f209 | 95 | |
e8324357 S |
96 | static void ath_tx_pause_tid(struct ath_softc *sc, struct ath_atx_tid *tid) |
97 | { | |
98 | struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum]; | |
f078f209 | 99 | |
e8324357 S |
100 | spin_lock_bh(&txq->axq_lock); |
101 | tid->paused++; | |
102 | spin_unlock_bh(&txq->axq_lock); | |
f078f209 LR |
103 | } |
104 | ||
e8324357 | 105 | static void ath_tx_resume_tid(struct ath_softc *sc, struct ath_atx_tid *tid) |
f078f209 | 106 | { |
e8324357 | 107 | struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum]; |
e6a9854b | 108 | |
e8324357 S |
109 | ASSERT(tid->paused > 0); |
110 | spin_lock_bh(&txq->axq_lock); | |
f078f209 | 111 | |
e8324357 | 112 | tid->paused--; |
f078f209 | 113 | |
e8324357 S |
114 | if (tid->paused > 0) |
115 | goto unlock; | |
f078f209 | 116 | |
e8324357 S |
117 | if (list_empty(&tid->buf_q)) |
118 | goto unlock; | |
f078f209 | 119 | |
e8324357 S |
120 | ath_tx_queue_tid(txq, tid); |
121 | ath_txq_schedule(sc, txq); | |
122 | unlock: | |
123 | spin_unlock_bh(&txq->axq_lock); | |
528f0c6b | 124 | } |
f078f209 | 125 | |
e8324357 | 126 | static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid) |
528f0c6b | 127 | { |
e8324357 S |
128 | struct ath_txq *txq = &sc->tx.txq[tid->ac->qnum]; |
129 | struct ath_buf *bf; | |
130 | struct list_head bf_head; | |
131 | INIT_LIST_HEAD(&bf_head); | |
f078f209 | 132 | |
e8324357 S |
133 | ASSERT(tid->paused > 0); |
134 | spin_lock_bh(&txq->axq_lock); | |
e6a9854b | 135 | |
e8324357 | 136 | tid->paused--; |
f078f209 | 137 | |
e8324357 S |
138 | if (tid->paused > 0) { |
139 | spin_unlock_bh(&txq->axq_lock); | |
140 | return; | |
141 | } | |
f078f209 | 142 | |
e8324357 S |
143 | while (!list_empty(&tid->buf_q)) { |
144 | bf = list_first_entry(&tid->buf_q, struct ath_buf, list); | |
145 | ASSERT(!bf_isretried(bf)); | |
d43f3015 | 146 | list_move_tail(&bf->list, &bf_head); |
c37452b0 | 147 | ath_tx_send_ht_normal(sc, txq, tid, &bf_head); |
528f0c6b | 148 | } |
f078f209 | 149 | |
e8324357 | 150 | spin_unlock_bh(&txq->axq_lock); |
528f0c6b | 151 | } |
f078f209 | 152 | |
e8324357 S |
153 | static void ath_tx_update_baw(struct ath_softc *sc, struct ath_atx_tid *tid, |
154 | int seqno) | |
528f0c6b | 155 | { |
e8324357 | 156 | int index, cindex; |
f078f209 | 157 | |
e8324357 S |
158 | index = ATH_BA_INDEX(tid->seq_start, seqno); |
159 | cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); | |
f078f209 | 160 | |
e8324357 | 161 | tid->tx_buf[cindex] = NULL; |
528f0c6b | 162 | |
e8324357 S |
163 | while (tid->baw_head != tid->baw_tail && !tid->tx_buf[tid->baw_head]) { |
164 | INCR(tid->seq_start, IEEE80211_SEQ_MAX); | |
165 | INCR(tid->baw_head, ATH_TID_MAX_BUFS); | |
166 | } | |
528f0c6b | 167 | } |
f078f209 | 168 | |
e8324357 S |
169 | static void ath_tx_addto_baw(struct ath_softc *sc, struct ath_atx_tid *tid, |
170 | struct ath_buf *bf) | |
528f0c6b | 171 | { |
e8324357 | 172 | int index, cindex; |
528f0c6b | 173 | |
e8324357 S |
174 | if (bf_isretried(bf)) |
175 | return; | |
528f0c6b | 176 | |
e8324357 S |
177 | index = ATH_BA_INDEX(tid->seq_start, bf->bf_seqno); |
178 | cindex = (tid->baw_head + index) & (ATH_TID_MAX_BUFS - 1); | |
f078f209 | 179 | |
e8324357 S |
180 | ASSERT(tid->tx_buf[cindex] == NULL); |
181 | tid->tx_buf[cindex] = bf; | |
f078f209 | 182 | |
e8324357 S |
183 | if (index >= ((tid->baw_tail - tid->baw_head) & |
184 | (ATH_TID_MAX_BUFS - 1))) { | |
185 | tid->baw_tail = cindex; | |
186 | INCR(tid->baw_tail, ATH_TID_MAX_BUFS); | |
f078f209 | 187 | } |
f078f209 LR |
188 | } |
189 | ||
190 | /* | |
e8324357 S |
191 | * TODO: For frame(s) that are in the retry state, we will reuse the |
192 | * sequence number(s) without setting the retry bit. The | |
193 | * alternative is to give up on these and BAR the receiver's window | |
194 | * forward. | |
f078f209 | 195 | */ |
e8324357 S |
196 | static void ath_tid_drain(struct ath_softc *sc, struct ath_txq *txq, |
197 | struct ath_atx_tid *tid) | |
f078f209 | 198 | |
f078f209 | 199 | { |
e8324357 S |
200 | struct ath_buf *bf; |
201 | struct list_head bf_head; | |
202 | INIT_LIST_HEAD(&bf_head); | |
f078f209 | 203 | |
e8324357 S |
204 | for (;;) { |
205 | if (list_empty(&tid->buf_q)) | |
206 | break; | |
f078f209 | 207 | |
d43f3015 S |
208 | bf = list_first_entry(&tid->buf_q, struct ath_buf, list); |
209 | list_move_tail(&bf->list, &bf_head); | |
f078f209 | 210 | |
e8324357 S |
211 | if (bf_isretried(bf)) |
212 | ath_tx_update_baw(sc, tid, bf->bf_seqno); | |
f078f209 | 213 | |
e8324357 S |
214 | spin_unlock(&txq->axq_lock); |
215 | ath_tx_complete_buf(sc, bf, &bf_head, 0, 0); | |
216 | spin_lock(&txq->axq_lock); | |
217 | } | |
f078f209 | 218 | |
e8324357 S |
219 | tid->seq_next = tid->seq_start; |
220 | tid->baw_tail = tid->baw_head; | |
f078f209 LR |
221 | } |
222 | ||
e8324357 | 223 | static void ath_tx_set_retry(struct ath_softc *sc, struct ath_buf *bf) |
f078f209 | 224 | { |
e8324357 S |
225 | struct sk_buff *skb; |
226 | struct ieee80211_hdr *hdr; | |
f078f209 | 227 | |
e8324357 S |
228 | bf->bf_state.bf_type |= BUF_RETRY; |
229 | bf->bf_retries++; | |
f078f209 | 230 | |
e8324357 S |
231 | skb = bf->bf_mpdu; |
232 | hdr = (struct ieee80211_hdr *)skb->data; | |
233 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_RETRY); | |
f078f209 LR |
234 | } |
235 | ||
d43f3015 S |
236 | static struct ath_buf* ath_clone_txbuf(struct ath_softc *sc, struct ath_buf *bf) |
237 | { | |
238 | struct ath_buf *tbf; | |
239 | ||
240 | spin_lock_bh(&sc->tx.txbuflock); | |
241 | ASSERT(!list_empty((&sc->tx.txbuf))); | |
242 | tbf = list_first_entry(&sc->tx.txbuf, struct ath_buf, list); | |
243 | list_del(&tbf->list); | |
244 | spin_unlock_bh(&sc->tx.txbuflock); | |
245 | ||
246 | ATH_TXBUF_RESET(tbf); | |
247 | ||
248 | tbf->bf_mpdu = bf->bf_mpdu; | |
249 | tbf->bf_buf_addr = bf->bf_buf_addr; | |
250 | *(tbf->bf_desc) = *(bf->bf_desc); | |
251 | tbf->bf_state = bf->bf_state; | |
252 | tbf->bf_dmacontext = bf->bf_dmacontext; | |
253 | ||
254 | return tbf; | |
255 | } | |
256 | ||
257 | static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq, | |
258 | struct ath_buf *bf, struct list_head *bf_q, | |
259 | int txok) | |
f078f209 | 260 | { |
e8324357 S |
261 | struct ath_node *an = NULL; |
262 | struct sk_buff *skb; | |
1286ec6d S |
263 | struct ieee80211_sta *sta; |
264 | struct ieee80211_hdr *hdr; | |
e8324357 | 265 | struct ath_atx_tid *tid = NULL; |
d43f3015 | 266 | struct ath_buf *bf_next, *bf_last = bf->bf_lastbf; |
f078f209 | 267 | struct ath_desc *ds = bf_last->bf_desc; |
e8324357 | 268 | struct list_head bf_head, bf_pending; |
0934af23 | 269 | u16 seq_st = 0, acked_cnt = 0, txfail_cnt = 0; |
f078f209 | 270 | u32 ba[WME_BA_BMP_SIZE >> 5]; |
0934af23 VT |
271 | int isaggr, txfail, txpending, sendbar = 0, needreset = 0, nbad = 0; |
272 | bool rc_update = true; | |
f078f209 | 273 | |
a22be22a | 274 | skb = bf->bf_mpdu; |
1286ec6d S |
275 | hdr = (struct ieee80211_hdr *)skb->data; |
276 | ||
277 | rcu_read_lock(); | |
f078f209 | 278 | |
1286ec6d S |
279 | sta = ieee80211_find_sta(sc->hw, hdr->addr1); |
280 | if (!sta) { | |
281 | rcu_read_unlock(); | |
282 | return; | |
f078f209 LR |
283 | } |
284 | ||
1286ec6d S |
285 | an = (struct ath_node *)sta->drv_priv; |
286 | tid = ATH_AN_2_TID(an, bf->bf_tidno); | |
287 | ||
e8324357 | 288 | isaggr = bf_isaggr(bf); |
d43f3015 | 289 | memset(ba, 0, WME_BA_BMP_SIZE >> 3); |
f078f209 | 290 | |
d43f3015 S |
291 | if (isaggr && txok) { |
292 | if (ATH_DS_TX_BA(ds)) { | |
293 | seq_st = ATH_DS_BA_SEQ(ds); | |
294 | memcpy(ba, ATH_DS_BA_BITMAP(ds), | |
295 | WME_BA_BMP_SIZE >> 3); | |
e8324357 | 296 | } else { |
d43f3015 S |
297 | /* |
298 | * AR5416 can become deaf/mute when BA | |
299 | * issue happens. Chip needs to be reset. | |
300 | * But AP code may have sychronization issues | |
301 | * when perform internal reset in this routine. | |
302 | * Only enable reset in STA mode for now. | |
303 | */ | |
2660b81a | 304 | if (sc->sc_ah->opmode == NL80211_IFTYPE_STATION) |
d43f3015 | 305 | needreset = 1; |
e8324357 | 306 | } |
f078f209 LR |
307 | } |
308 | ||
e8324357 S |
309 | INIT_LIST_HEAD(&bf_pending); |
310 | INIT_LIST_HEAD(&bf_head); | |
f078f209 | 311 | |
0934af23 | 312 | nbad = ath_tx_num_badfrms(sc, bf, txok); |
e8324357 S |
313 | while (bf) { |
314 | txfail = txpending = 0; | |
315 | bf_next = bf->bf_next; | |
f078f209 | 316 | |
e8324357 S |
317 | if (ATH_BA_ISSET(ba, ATH_BA_INDEX(seq_st, bf->bf_seqno))) { |
318 | /* transmit completion, subframe is | |
319 | * acked by block ack */ | |
0934af23 | 320 | acked_cnt++; |
e8324357 S |
321 | } else if (!isaggr && txok) { |
322 | /* transmit completion */ | |
0934af23 | 323 | acked_cnt++; |
e8324357 | 324 | } else { |
e8324357 S |
325 | if (!(tid->state & AGGR_CLEANUP) && |
326 | ds->ds_txstat.ts_flags != ATH9K_TX_SW_ABORTED) { | |
327 | if (bf->bf_retries < ATH_MAX_SW_RETRIES) { | |
328 | ath_tx_set_retry(sc, bf); | |
329 | txpending = 1; | |
330 | } else { | |
331 | bf->bf_state.bf_type |= BUF_XRETRY; | |
332 | txfail = 1; | |
333 | sendbar = 1; | |
0934af23 | 334 | txfail_cnt++; |
e8324357 S |
335 | } |
336 | } else { | |
337 | /* | |
338 | * cleanup in progress, just fail | |
339 | * the un-acked sub-frames | |
340 | */ | |
341 | txfail = 1; | |
342 | } | |
343 | } | |
f078f209 | 344 | |
e8324357 | 345 | if (bf_next == NULL) { |
cbfe89c6 VT |
346 | /* |
347 | * Make sure the last desc is reclaimed if it | |
348 | * not a holding desc. | |
349 | */ | |
350 | if (!bf_last->bf_stale) | |
351 | list_move_tail(&bf->list, &bf_head); | |
352 | else | |
353 | INIT_LIST_HEAD(&bf_head); | |
e8324357 S |
354 | } else { |
355 | ASSERT(!list_empty(bf_q)); | |
d43f3015 | 356 | list_move_tail(&bf->list, &bf_head); |
e8324357 | 357 | } |
f078f209 | 358 | |
e8324357 S |
359 | if (!txpending) { |
360 | /* | |
361 | * complete the acked-ones/xretried ones; update | |
362 | * block-ack window | |
363 | */ | |
364 | spin_lock_bh(&txq->axq_lock); | |
365 | ath_tx_update_baw(sc, tid, bf->bf_seqno); | |
366 | spin_unlock_bh(&txq->axq_lock); | |
f078f209 | 367 | |
8a92e2ee VT |
368 | if (rc_update && (acked_cnt == 1 || txfail_cnt == 1)) { |
369 | ath_tx_rc_status(bf, ds, nbad, txok, true); | |
370 | rc_update = false; | |
371 | } else { | |
372 | ath_tx_rc_status(bf, ds, nbad, txok, false); | |
373 | } | |
374 | ||
e8324357 S |
375 | ath_tx_complete_buf(sc, bf, &bf_head, !txfail, sendbar); |
376 | } else { | |
d43f3015 | 377 | /* retry the un-acked ones */ |
a119cc49 | 378 | if (bf->bf_next == NULL && bf_last->bf_stale) { |
e8324357 | 379 | struct ath_buf *tbf; |
f078f209 | 380 | |
d43f3015 S |
381 | tbf = ath_clone_txbuf(sc, bf_last); |
382 | ath9k_hw_cleartxdesc(sc->sc_ah, tbf->bf_desc); | |
e8324357 S |
383 | list_add_tail(&tbf->list, &bf_head); |
384 | } else { | |
385 | /* | |
386 | * Clear descriptor status words for | |
387 | * software retry | |
388 | */ | |
d43f3015 | 389 | ath9k_hw_cleartxdesc(sc->sc_ah, bf->bf_desc); |
e8324357 S |
390 | } |
391 | ||
392 | /* | |
393 | * Put this buffer to the temporary pending | |
394 | * queue to retain ordering | |
395 | */ | |
396 | list_splice_tail_init(&bf_head, &bf_pending); | |
397 | } | |
398 | ||
399 | bf = bf_next; | |
f078f209 | 400 | } |
f078f209 | 401 | |
e8324357 | 402 | if (tid->state & AGGR_CLEANUP) { |
e8324357 S |
403 | if (tid->baw_head == tid->baw_tail) { |
404 | tid->state &= ~AGGR_ADDBA_COMPLETE; | |
405 | tid->addba_exchangeattempts = 0; | |
e8324357 | 406 | tid->state &= ~AGGR_CLEANUP; |
e63835b0 | 407 | |
e8324357 S |
408 | /* send buffered frames as singles */ |
409 | ath_tx_flush_tid(sc, tid); | |
d43f3015 | 410 | } |
1286ec6d | 411 | rcu_read_unlock(); |
e8324357 S |
412 | return; |
413 | } | |
f078f209 | 414 | |
d43f3015 | 415 | /* prepend un-acked frames to the beginning of the pending frame queue */ |
e8324357 S |
416 | if (!list_empty(&bf_pending)) { |
417 | spin_lock_bh(&txq->axq_lock); | |
418 | list_splice(&bf_pending, &tid->buf_q); | |
419 | ath_tx_queue_tid(txq, tid); | |
420 | spin_unlock_bh(&txq->axq_lock); | |
421 | } | |
102e0572 | 422 | |
1286ec6d S |
423 | rcu_read_unlock(); |
424 | ||
e8324357 S |
425 | if (needreset) |
426 | ath_reset(sc, false); | |
e8324357 | 427 | } |
f078f209 | 428 | |
e8324357 S |
429 | static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf, |
430 | struct ath_atx_tid *tid) | |
f078f209 | 431 | { |
4f0fc7c3 | 432 | const struct ath_rate_table *rate_table = sc->cur_rate_table; |
528f0c6b S |
433 | struct sk_buff *skb; |
434 | struct ieee80211_tx_info *tx_info; | |
a8efee4f | 435 | struct ieee80211_tx_rate *rates; |
e8324357 | 436 | struct ath_tx_info_priv *tx_info_priv; |
d43f3015 | 437 | u32 max_4ms_framelen, frmlen; |
e8324357 S |
438 | u16 aggr_limit, legacy = 0, maxampdu; |
439 | int i; | |
528f0c6b | 440 | |
a22be22a | 441 | skb = bf->bf_mpdu; |
528f0c6b | 442 | tx_info = IEEE80211_SKB_CB(skb); |
e63835b0 | 443 | rates = tx_info->control.rates; |
d43f3015 | 444 | tx_info_priv = (struct ath_tx_info_priv *)tx_info->rate_driver_data[0]; |
528f0c6b | 445 | |
e8324357 S |
446 | /* |
447 | * Find the lowest frame length among the rate series that will have a | |
448 | * 4ms transmit duration. | |
449 | * TODO - TXOP limit needs to be considered. | |
450 | */ | |
451 | max_4ms_framelen = ATH_AMPDU_LIMIT_MAX; | |
e63835b0 | 452 | |
e8324357 S |
453 | for (i = 0; i < 4; i++) { |
454 | if (rates[i].count) { | |
455 | if (!WLAN_RC_PHY_HT(rate_table->info[rates[i].idx].phy)) { | |
456 | legacy = 1; | |
457 | break; | |
458 | } | |
459 | ||
d43f3015 S |
460 | frmlen = rate_table->info[rates[i].idx].max_4ms_framelen; |
461 | max_4ms_framelen = min(max_4ms_framelen, frmlen); | |
f078f209 LR |
462 | } |
463 | } | |
e63835b0 | 464 | |
f078f209 | 465 | /* |
e8324357 S |
466 | * limit aggregate size by the minimum rate if rate selected is |
467 | * not a probe rate, if rate selected is a probe rate then | |
468 | * avoid aggregation of this packet. | |
f078f209 | 469 | */ |
e8324357 S |
470 | if (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE || legacy) |
471 | return 0; | |
f078f209 | 472 | |
d43f3015 | 473 | aggr_limit = min(max_4ms_framelen, (u32)ATH_AMPDU_LIMIT_DEFAULT); |
f078f209 | 474 | |
e8324357 S |
475 | /* |
476 | * h/w can accept aggregates upto 16 bit lengths (65535). | |
477 | * The IE, however can hold upto 65536, which shows up here | |
478 | * as zero. Ignore 65536 since we are constrained by hw. | |
f078f209 | 479 | */ |
e8324357 S |
480 | maxampdu = tid->an->maxampdu; |
481 | if (maxampdu) | |
482 | aggr_limit = min(aggr_limit, maxampdu); | |
f078f209 | 483 | |
e8324357 S |
484 | return aggr_limit; |
485 | } | |
f078f209 | 486 | |
e8324357 | 487 | /* |
d43f3015 | 488 | * Returns the number of delimiters to be added to |
e8324357 | 489 | * meet the minimum required mpdudensity. |
d43f3015 | 490 | * caller should make sure that the rate is HT rate . |
e8324357 S |
491 | */ |
492 | static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid, | |
493 | struct ath_buf *bf, u16 frmlen) | |
494 | { | |
4f0fc7c3 | 495 | const struct ath_rate_table *rt = sc->cur_rate_table; |
e8324357 S |
496 | struct sk_buff *skb = bf->bf_mpdu; |
497 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); | |
498 | u32 nsymbits, nsymbols, mpdudensity; | |
499 | u16 minlen; | |
500 | u8 rc, flags, rix; | |
501 | int width, half_gi, ndelim, mindelim; | |
502 | ||
503 | /* Select standard number of delimiters based on frame length alone */ | |
504 | ndelim = ATH_AGGR_GET_NDELIM(frmlen); | |
f078f209 LR |
505 | |
506 | /* | |
e8324357 S |
507 | * If encryption enabled, hardware requires some more padding between |
508 | * subframes. | |
509 | * TODO - this could be improved to be dependent on the rate. | |
510 | * The hardware can keep up at lower rates, but not higher rates | |
f078f209 | 511 | */ |
e8324357 S |
512 | if (bf->bf_keytype != ATH9K_KEY_TYPE_CLEAR) |
513 | ndelim += ATH_AGGR_ENCRYPTDELIM; | |
f078f209 | 514 | |
e8324357 S |
515 | /* |
516 | * Convert desired mpdu density from microeconds to bytes based | |
517 | * on highest rate in rate series (i.e. first rate) to determine | |
518 | * required minimum length for subframe. Take into account | |
519 | * whether high rate is 20 or 40Mhz and half or full GI. | |
520 | */ | |
521 | mpdudensity = tid->an->mpdudensity; | |
f078f209 | 522 | |
e8324357 S |
523 | /* |
524 | * If there is no mpdu density restriction, no further calculation | |
525 | * is needed. | |
526 | */ | |
527 | if (mpdudensity == 0) | |
528 | return ndelim; | |
f078f209 | 529 | |
e8324357 S |
530 | rix = tx_info->control.rates[0].idx; |
531 | flags = tx_info->control.rates[0].flags; | |
532 | rc = rt->info[rix].ratecode; | |
533 | width = (flags & IEEE80211_TX_RC_40_MHZ_WIDTH) ? 1 : 0; | |
534 | half_gi = (flags & IEEE80211_TX_RC_SHORT_GI) ? 1 : 0; | |
f078f209 | 535 | |
e8324357 S |
536 | if (half_gi) |
537 | nsymbols = NUM_SYMBOLS_PER_USEC_HALFGI(mpdudensity); | |
538 | else | |
539 | nsymbols = NUM_SYMBOLS_PER_USEC(mpdudensity); | |
f078f209 | 540 | |
e8324357 S |
541 | if (nsymbols == 0) |
542 | nsymbols = 1; | |
f078f209 | 543 | |
e8324357 S |
544 | nsymbits = bits_per_symbol[HT_RC_2_MCS(rc)][width]; |
545 | minlen = (nsymbols * nsymbits) / BITS_PER_BYTE; | |
f078f209 | 546 | |
e8324357 | 547 | if (frmlen < minlen) { |
e8324357 S |
548 | mindelim = (minlen - frmlen) / ATH_AGGR_DELIM_SZ; |
549 | ndelim = max(mindelim, ndelim); | |
f078f209 LR |
550 | } |
551 | ||
e8324357 | 552 | return ndelim; |
f078f209 LR |
553 | } |
554 | ||
e8324357 | 555 | static enum ATH_AGGR_STATUS ath_tx_form_aggr(struct ath_softc *sc, |
d43f3015 S |
556 | struct ath_atx_tid *tid, |
557 | struct list_head *bf_q) | |
f078f209 | 558 | { |
e8324357 | 559 | #define PADBYTES(_len) ((4 - ((_len) % 4)) % 4) |
d43f3015 S |
560 | struct ath_buf *bf, *bf_first, *bf_prev = NULL; |
561 | int rl = 0, nframes = 0, ndelim, prev_al = 0; | |
e8324357 S |
562 | u16 aggr_limit = 0, al = 0, bpad = 0, |
563 | al_delta, h_baw = tid->baw_size / 2; | |
564 | enum ATH_AGGR_STATUS status = ATH_AGGR_DONE; | |
f078f209 | 565 | |
e8324357 | 566 | bf_first = list_first_entry(&tid->buf_q, struct ath_buf, list); |
f078f209 | 567 | |
e8324357 S |
568 | do { |
569 | bf = list_first_entry(&tid->buf_q, struct ath_buf, list); | |
f078f209 | 570 | |
d43f3015 | 571 | /* do not step over block-ack window */ |
e8324357 S |
572 | if (!BAW_WITHIN(tid->seq_start, tid->baw_size, bf->bf_seqno)) { |
573 | status = ATH_AGGR_BAW_CLOSED; | |
574 | break; | |
575 | } | |
f078f209 | 576 | |
e8324357 S |
577 | if (!rl) { |
578 | aggr_limit = ath_lookup_rate(sc, bf, tid); | |
579 | rl = 1; | |
580 | } | |
f078f209 | 581 | |
d43f3015 | 582 | /* do not exceed aggregation limit */ |
e8324357 | 583 | al_delta = ATH_AGGR_DELIM_SZ + bf->bf_frmlen; |
f078f209 | 584 | |
d43f3015 S |
585 | if (nframes && |
586 | (aggr_limit < (al + bpad + al_delta + prev_al))) { | |
e8324357 S |
587 | status = ATH_AGGR_LIMITED; |
588 | break; | |
589 | } | |
f078f209 | 590 | |
d43f3015 S |
591 | /* do not exceed subframe limit */ |
592 | if (nframes >= min((int)h_baw, ATH_AMPDU_SUBFRAME_DEFAULT)) { | |
e8324357 S |
593 | status = ATH_AGGR_LIMITED; |
594 | break; | |
595 | } | |
d43f3015 | 596 | nframes++; |
f078f209 | 597 | |
d43f3015 | 598 | /* add padding for previous frame to aggregation length */ |
e8324357 | 599 | al += bpad + al_delta; |
f078f209 | 600 | |
e8324357 S |
601 | /* |
602 | * Get the delimiters needed to meet the MPDU | |
603 | * density for this node. | |
604 | */ | |
605 | ndelim = ath_compute_num_delims(sc, tid, bf_first, bf->bf_frmlen); | |
e8324357 | 606 | bpad = PADBYTES(al_delta) + (ndelim << 2); |
f078f209 | 607 | |
e8324357 | 608 | bf->bf_next = NULL; |
d43f3015 | 609 | bf->bf_desc->ds_link = 0; |
f078f209 | 610 | |
d43f3015 | 611 | /* link buffers of this frame to the aggregate */ |
e8324357 | 612 | ath_tx_addto_baw(sc, tid, bf); |
d43f3015 S |
613 | ath9k_hw_set11n_aggr_middle(sc->sc_ah, bf->bf_desc, ndelim); |
614 | list_move_tail(&bf->list, bf_q); | |
e8324357 S |
615 | if (bf_prev) { |
616 | bf_prev->bf_next = bf; | |
d43f3015 | 617 | bf_prev->bf_desc->ds_link = bf->bf_daddr; |
e8324357 S |
618 | } |
619 | bf_prev = bf; | |
e8324357 | 620 | } while (!list_empty(&tid->buf_q)); |
f078f209 | 621 | |
e8324357 S |
622 | bf_first->bf_al = al; |
623 | bf_first->bf_nframes = nframes; | |
d43f3015 | 624 | |
e8324357 S |
625 | return status; |
626 | #undef PADBYTES | |
627 | } | |
f078f209 | 628 | |
e8324357 S |
629 | static void ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq, |
630 | struct ath_atx_tid *tid) | |
631 | { | |
d43f3015 | 632 | struct ath_buf *bf; |
e8324357 S |
633 | enum ATH_AGGR_STATUS status; |
634 | struct list_head bf_q; | |
f078f209 | 635 | |
e8324357 S |
636 | do { |
637 | if (list_empty(&tid->buf_q)) | |
638 | return; | |
f078f209 | 639 | |
e8324357 S |
640 | INIT_LIST_HEAD(&bf_q); |
641 | ||
d43f3015 | 642 | status = ath_tx_form_aggr(sc, tid, &bf_q); |
f078f209 | 643 | |
f078f209 | 644 | /* |
d43f3015 S |
645 | * no frames picked up to be aggregated; |
646 | * block-ack window is not open. | |
f078f209 | 647 | */ |
e8324357 S |
648 | if (list_empty(&bf_q)) |
649 | break; | |
f078f209 | 650 | |
e8324357 | 651 | bf = list_first_entry(&bf_q, struct ath_buf, list); |
d43f3015 | 652 | bf->bf_lastbf = list_entry(bf_q.prev, struct ath_buf, list); |
f078f209 | 653 | |
d43f3015 | 654 | /* if only one frame, send as non-aggregate */ |
e8324357 | 655 | if (bf->bf_nframes == 1) { |
e8324357 | 656 | bf->bf_state.bf_type &= ~BUF_AGGR; |
d43f3015 | 657 | ath9k_hw_clr11n_aggr(sc->sc_ah, bf->bf_desc); |
e8324357 S |
658 | ath_buf_set_rate(sc, bf); |
659 | ath_tx_txqaddbuf(sc, txq, &bf_q); | |
660 | continue; | |
661 | } | |
f078f209 | 662 | |
d43f3015 | 663 | /* setup first desc of aggregate */ |
e8324357 S |
664 | bf->bf_state.bf_type |= BUF_AGGR; |
665 | ath_buf_set_rate(sc, bf); | |
666 | ath9k_hw_set11n_aggr_first(sc->sc_ah, bf->bf_desc, bf->bf_al); | |
f078f209 | 667 | |
d43f3015 S |
668 | /* anchor last desc of aggregate */ |
669 | ath9k_hw_set11n_aggr_last(sc->sc_ah, bf->bf_lastbf->bf_desc); | |
f078f209 | 670 | |
e8324357 | 671 | txq->axq_aggr_depth++; |
e8324357 | 672 | ath_tx_txqaddbuf(sc, txq, &bf_q); |
f078f209 | 673 | |
e8324357 S |
674 | } while (txq->axq_depth < ATH_AGGR_MIN_QDEPTH && |
675 | status != ATH_AGGR_BAW_CLOSED); | |
676 | } | |
677 | ||
678 | int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta, | |
679 | u16 tid, u16 *ssn) | |
680 | { | |
681 | struct ath_atx_tid *txtid; | |
682 | struct ath_node *an; | |
683 | ||
684 | an = (struct ath_node *)sta->drv_priv; | |
685 | ||
686 | if (sc->sc_flags & SC_OP_TXAGGR) { | |
687 | txtid = ATH_AN_2_TID(an, tid); | |
688 | txtid->state |= AGGR_ADDBA_PROGRESS; | |
689 | ath_tx_pause_tid(sc, txtid); | |
d22b0022 | 690 | *ssn = txtid->seq_start; |
f078f209 LR |
691 | } |
692 | ||
e8324357 S |
693 | return 0; |
694 | } | |
f078f209 | 695 | |
e8324357 S |
696 | int ath_tx_aggr_stop(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid) |
697 | { | |
698 | struct ath_node *an = (struct ath_node *)sta->drv_priv; | |
699 | struct ath_atx_tid *txtid = ATH_AN_2_TID(an, tid); | |
700 | struct ath_txq *txq = &sc->tx.txq[txtid->ac->qnum]; | |
701 | struct ath_buf *bf; | |
702 | struct list_head bf_head; | |
703 | INIT_LIST_HEAD(&bf_head); | |
f078f209 | 704 | |
e8324357 S |
705 | if (txtid->state & AGGR_CLEANUP) |
706 | return 0; | |
f078f209 | 707 | |
e8324357 | 708 | if (!(txtid->state & AGGR_ADDBA_COMPLETE)) { |
5eae6592 | 709 | txtid->state &= ~AGGR_ADDBA_PROGRESS; |
e8324357 S |
710 | txtid->addba_exchangeattempts = 0; |
711 | return 0; | |
712 | } | |
f078f209 | 713 | |
e8324357 S |
714 | ath_tx_pause_tid(sc, txtid); |
715 | ||
716 | /* drop all software retried frames and mark this TID */ | |
717 | spin_lock_bh(&txq->axq_lock); | |
718 | while (!list_empty(&txtid->buf_q)) { | |
719 | bf = list_first_entry(&txtid->buf_q, struct ath_buf, list); | |
720 | if (!bf_isretried(bf)) { | |
721 | /* | |
722 | * NB: it's based on the assumption that | |
723 | * software retried frame will always stay | |
724 | * at the head of software queue. | |
725 | */ | |
726 | break; | |
727 | } | |
d43f3015 | 728 | list_move_tail(&bf->list, &bf_head); |
e8324357 S |
729 | ath_tx_update_baw(sc, txtid, bf->bf_seqno); |
730 | ath_tx_complete_buf(sc, bf, &bf_head, 0, 0); | |
f078f209 | 731 | } |
d43f3015 | 732 | spin_unlock_bh(&txq->axq_lock); |
f078f209 | 733 | |
e8324357 | 734 | if (txtid->baw_head != txtid->baw_tail) { |
e8324357 S |
735 | txtid->state |= AGGR_CLEANUP; |
736 | } else { | |
737 | txtid->state &= ~AGGR_ADDBA_COMPLETE; | |
738 | txtid->addba_exchangeattempts = 0; | |
e8324357 | 739 | ath_tx_flush_tid(sc, txtid); |
f078f209 LR |
740 | } |
741 | ||
e8324357 S |
742 | return 0; |
743 | } | |
f078f209 | 744 | |
e8324357 S |
745 | void ath_tx_aggr_resume(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid) |
746 | { | |
747 | struct ath_atx_tid *txtid; | |
748 | struct ath_node *an; | |
749 | ||
750 | an = (struct ath_node *)sta->drv_priv; | |
751 | ||
752 | if (sc->sc_flags & SC_OP_TXAGGR) { | |
753 | txtid = ATH_AN_2_TID(an, tid); | |
754 | txtid->baw_size = | |
755 | IEEE80211_MIN_AMPDU_BUF << sta->ht_cap.ampdu_factor; | |
756 | txtid->state |= AGGR_ADDBA_COMPLETE; | |
757 | txtid->state &= ~AGGR_ADDBA_PROGRESS; | |
758 | ath_tx_resume_tid(sc, txtid); | |
759 | } | |
f078f209 LR |
760 | } |
761 | ||
e8324357 | 762 | bool ath_tx_aggr_check(struct ath_softc *sc, struct ath_node *an, u8 tidno) |
c4288390 | 763 | { |
e8324357 | 764 | struct ath_atx_tid *txtid; |
c4288390 | 765 | |
e8324357 S |
766 | if (!(sc->sc_flags & SC_OP_TXAGGR)) |
767 | return false; | |
c4288390 | 768 | |
e8324357 S |
769 | txtid = ATH_AN_2_TID(an, tidno); |
770 | ||
771 | if (!(txtid->state & AGGR_ADDBA_COMPLETE)) { | |
772 | if (!(txtid->state & AGGR_ADDBA_PROGRESS) && | |
773 | (txtid->addba_exchangeattempts < ADDBA_EXCHANGE_ATTEMPTS)) { | |
774 | txtid->addba_exchangeattempts++; | |
775 | return true; | |
c4288390 S |
776 | } |
777 | } | |
e8324357 S |
778 | |
779 | return false; | |
c4288390 S |
780 | } |
781 | ||
e8324357 S |
782 | /********************/ |
783 | /* Queue Management */ | |
784 | /********************/ | |
f078f209 | 785 | |
e8324357 S |
786 | static void ath_txq_drain_pending_buffers(struct ath_softc *sc, |
787 | struct ath_txq *txq) | |
f078f209 | 788 | { |
e8324357 S |
789 | struct ath_atx_ac *ac, *ac_tmp; |
790 | struct ath_atx_tid *tid, *tid_tmp; | |
f078f209 | 791 | |
e8324357 S |
792 | list_for_each_entry_safe(ac, ac_tmp, &txq->axq_acq, list) { |
793 | list_del(&ac->list); | |
794 | ac->sched = false; | |
795 | list_for_each_entry_safe(tid, tid_tmp, &ac->tid_q, list) { | |
796 | list_del(&tid->list); | |
797 | tid->sched = false; | |
798 | ath_tid_drain(sc, txq, tid); | |
799 | } | |
f078f209 LR |
800 | } |
801 | } | |
802 | ||
e8324357 | 803 | struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype) |
f078f209 | 804 | { |
cbe61d8a | 805 | struct ath_hw *ah = sc->sc_ah; |
e8324357 S |
806 | struct ath9k_tx_queue_info qi; |
807 | int qnum; | |
f078f209 | 808 | |
e8324357 S |
809 | memset(&qi, 0, sizeof(qi)); |
810 | qi.tqi_subtype = subtype; | |
811 | qi.tqi_aifs = ATH9K_TXQ_USEDEFAULT; | |
812 | qi.tqi_cwmin = ATH9K_TXQ_USEDEFAULT; | |
813 | qi.tqi_cwmax = ATH9K_TXQ_USEDEFAULT; | |
814 | qi.tqi_physCompBuf = 0; | |
f078f209 LR |
815 | |
816 | /* | |
e8324357 S |
817 | * Enable interrupts only for EOL and DESC conditions. |
818 | * We mark tx descriptors to receive a DESC interrupt | |
819 | * when a tx queue gets deep; otherwise waiting for the | |
820 | * EOL to reap descriptors. Note that this is done to | |
821 | * reduce interrupt load and this only defers reaping | |
822 | * descriptors, never transmitting frames. Aside from | |
823 | * reducing interrupts this also permits more concurrency. | |
824 | * The only potential downside is if the tx queue backs | |
825 | * up in which case the top half of the kernel may backup | |
826 | * due to a lack of tx descriptors. | |
827 | * | |
828 | * The UAPSD queue is an exception, since we take a desc- | |
829 | * based intr on the EOSP frames. | |
f078f209 | 830 | */ |
e8324357 S |
831 | if (qtype == ATH9K_TX_QUEUE_UAPSD) |
832 | qi.tqi_qflags = TXQ_FLAG_TXDESCINT_ENABLE; | |
833 | else | |
834 | qi.tqi_qflags = TXQ_FLAG_TXEOLINT_ENABLE | | |
835 | TXQ_FLAG_TXDESCINT_ENABLE; | |
836 | qnum = ath9k_hw_setuptxqueue(ah, qtype, &qi); | |
837 | if (qnum == -1) { | |
f078f209 | 838 | /* |
e8324357 S |
839 | * NB: don't print a message, this happens |
840 | * normally on parts with too few tx queues | |
f078f209 | 841 | */ |
e8324357 | 842 | return NULL; |
f078f209 | 843 | } |
e8324357 S |
844 | if (qnum >= ARRAY_SIZE(sc->tx.txq)) { |
845 | DPRINTF(sc, ATH_DBG_FATAL, | |
846 | "qnum %u out of range, max %u!\n", | |
847 | qnum, (unsigned int)ARRAY_SIZE(sc->tx.txq)); | |
848 | ath9k_hw_releasetxqueue(ah, qnum); | |
849 | return NULL; | |
850 | } | |
851 | if (!ATH_TXQ_SETUP(sc, qnum)) { | |
852 | struct ath_txq *txq = &sc->tx.txq[qnum]; | |
f078f209 | 853 | |
e8324357 S |
854 | txq->axq_qnum = qnum; |
855 | txq->axq_link = NULL; | |
856 | INIT_LIST_HEAD(&txq->axq_q); | |
857 | INIT_LIST_HEAD(&txq->axq_acq); | |
858 | spin_lock_init(&txq->axq_lock); | |
859 | txq->axq_depth = 0; | |
860 | txq->axq_aggr_depth = 0; | |
861 | txq->axq_totalqueued = 0; | |
862 | txq->axq_linkbuf = NULL; | |
863 | sc->tx.txqsetup |= 1<<qnum; | |
864 | } | |
865 | return &sc->tx.txq[qnum]; | |
f078f209 LR |
866 | } |
867 | ||
e8324357 | 868 | static int ath_tx_get_qnum(struct ath_softc *sc, int qtype, int haltype) |
f078f209 | 869 | { |
e8324357 | 870 | int qnum; |
f078f209 | 871 | |
e8324357 S |
872 | switch (qtype) { |
873 | case ATH9K_TX_QUEUE_DATA: | |
874 | if (haltype >= ARRAY_SIZE(sc->tx.hwq_map)) { | |
875 | DPRINTF(sc, ATH_DBG_FATAL, | |
876 | "HAL AC %u out of range, max %zu!\n", | |
877 | haltype, ARRAY_SIZE(sc->tx.hwq_map)); | |
878 | return -1; | |
879 | } | |
880 | qnum = sc->tx.hwq_map[haltype]; | |
881 | break; | |
882 | case ATH9K_TX_QUEUE_BEACON: | |
883 | qnum = sc->beacon.beaconq; | |
884 | break; | |
885 | case ATH9K_TX_QUEUE_CAB: | |
886 | qnum = sc->beacon.cabq->axq_qnum; | |
887 | break; | |
888 | default: | |
889 | qnum = -1; | |
890 | } | |
891 | return qnum; | |
892 | } | |
f078f209 | 893 | |
e8324357 S |
894 | struct ath_txq *ath_test_get_txq(struct ath_softc *sc, struct sk_buff *skb) |
895 | { | |
896 | struct ath_txq *txq = NULL; | |
897 | int qnum; | |
f078f209 | 898 | |
e8324357 S |
899 | qnum = ath_get_hal_qnum(skb_get_queue_mapping(skb), sc); |
900 | txq = &sc->tx.txq[qnum]; | |
f078f209 | 901 | |
e8324357 S |
902 | spin_lock_bh(&txq->axq_lock); |
903 | ||
904 | if (txq->axq_depth >= (ATH_TXBUF - 20)) { | |
c117fa0b | 905 | DPRINTF(sc, ATH_DBG_XMIT, |
e8324357 S |
906 | "TX queue: %d is full, depth: %d\n", |
907 | qnum, txq->axq_depth); | |
908 | ieee80211_stop_queue(sc->hw, skb_get_queue_mapping(skb)); | |
909 | txq->stopped = 1; | |
910 | spin_unlock_bh(&txq->axq_lock); | |
911 | return NULL; | |
f078f209 LR |
912 | } |
913 | ||
e8324357 S |
914 | spin_unlock_bh(&txq->axq_lock); |
915 | ||
916 | return txq; | |
917 | } | |
918 | ||
919 | int ath_txq_update(struct ath_softc *sc, int qnum, | |
920 | struct ath9k_tx_queue_info *qinfo) | |
921 | { | |
cbe61d8a | 922 | struct ath_hw *ah = sc->sc_ah; |
e8324357 S |
923 | int error = 0; |
924 | struct ath9k_tx_queue_info qi; | |
925 | ||
926 | if (qnum == sc->beacon.beaconq) { | |
927 | /* | |
928 | * XXX: for beacon queue, we just save the parameter. | |
929 | * It will be picked up by ath_beaconq_config when | |
930 | * it's necessary. | |
931 | */ | |
932 | sc->beacon.beacon_qi = *qinfo; | |
f078f209 | 933 | return 0; |
e8324357 | 934 | } |
f078f209 | 935 | |
e8324357 S |
936 | ASSERT(sc->tx.txq[qnum].axq_qnum == qnum); |
937 | ||
938 | ath9k_hw_get_txq_props(ah, qnum, &qi); | |
939 | qi.tqi_aifs = qinfo->tqi_aifs; | |
940 | qi.tqi_cwmin = qinfo->tqi_cwmin; | |
941 | qi.tqi_cwmax = qinfo->tqi_cwmax; | |
942 | qi.tqi_burstTime = qinfo->tqi_burstTime; | |
943 | qi.tqi_readyTime = qinfo->tqi_readyTime; | |
944 | ||
945 | if (!ath9k_hw_set_txq_props(ah, qnum, &qi)) { | |
946 | DPRINTF(sc, ATH_DBG_FATAL, | |
947 | "Unable to update hardware queue %u!\n", qnum); | |
948 | error = -EIO; | |
949 | } else { | |
950 | ath9k_hw_resettxqueue(ah, qnum); | |
951 | } | |
952 | ||
953 | return error; | |
954 | } | |
955 | ||
956 | int ath_cabq_update(struct ath_softc *sc) | |
957 | { | |
958 | struct ath9k_tx_queue_info qi; | |
959 | int qnum = sc->beacon.cabq->axq_qnum; | |
f078f209 | 960 | |
e8324357 | 961 | ath9k_hw_get_txq_props(sc->sc_ah, qnum, &qi); |
f078f209 | 962 | /* |
e8324357 | 963 | * Ensure the readytime % is within the bounds. |
f078f209 | 964 | */ |
17d7904d S |
965 | if (sc->config.cabqReadytime < ATH9K_READY_TIME_LO_BOUND) |
966 | sc->config.cabqReadytime = ATH9K_READY_TIME_LO_BOUND; | |
967 | else if (sc->config.cabqReadytime > ATH9K_READY_TIME_HI_BOUND) | |
968 | sc->config.cabqReadytime = ATH9K_READY_TIME_HI_BOUND; | |
f078f209 | 969 | |
57c4d7b4 | 970 | qi.tqi_readyTime = (sc->beacon_interval * |
fdbf7335 | 971 | sc->config.cabqReadytime) / 100; |
e8324357 S |
972 | ath_txq_update(sc, qnum, &qi); |
973 | ||
974 | return 0; | |
f078f209 LR |
975 | } |
976 | ||
043a0405 S |
977 | /* |
978 | * Drain a given TX queue (could be Beacon or Data) | |
979 | * | |
980 | * This assumes output has been stopped and | |
981 | * we do not need to block ath_tx_tasklet. | |
982 | */ | |
983 | void ath_draintxq(struct ath_softc *sc, struct ath_txq *txq, bool retry_tx) | |
f078f209 | 984 | { |
e8324357 S |
985 | struct ath_buf *bf, *lastbf; |
986 | struct list_head bf_head; | |
f078f209 | 987 | |
e8324357 | 988 | INIT_LIST_HEAD(&bf_head); |
f078f209 | 989 | |
e8324357 S |
990 | for (;;) { |
991 | spin_lock_bh(&txq->axq_lock); | |
f078f209 | 992 | |
e8324357 S |
993 | if (list_empty(&txq->axq_q)) { |
994 | txq->axq_link = NULL; | |
995 | txq->axq_linkbuf = NULL; | |
996 | spin_unlock_bh(&txq->axq_lock); | |
997 | break; | |
998 | } | |
f078f209 | 999 | |
e8324357 | 1000 | bf = list_first_entry(&txq->axq_q, struct ath_buf, list); |
f078f209 | 1001 | |
a119cc49 | 1002 | if (bf->bf_stale) { |
e8324357 S |
1003 | list_del(&bf->list); |
1004 | spin_unlock_bh(&txq->axq_lock); | |
f078f209 | 1005 | |
e8324357 S |
1006 | spin_lock_bh(&sc->tx.txbuflock); |
1007 | list_add_tail(&bf->list, &sc->tx.txbuf); | |
1008 | spin_unlock_bh(&sc->tx.txbuflock); | |
1009 | continue; | |
1010 | } | |
f078f209 | 1011 | |
e8324357 S |
1012 | lastbf = bf->bf_lastbf; |
1013 | if (!retry_tx) | |
1014 | lastbf->bf_desc->ds_txstat.ts_flags = | |
1015 | ATH9K_TX_SW_ABORTED; | |
f078f209 | 1016 | |
e8324357 S |
1017 | /* remove ath_buf's of the same mpdu from txq */ |
1018 | list_cut_position(&bf_head, &txq->axq_q, &lastbf->list); | |
1019 | txq->axq_depth--; | |
f078f209 | 1020 | |
e8324357 S |
1021 | spin_unlock_bh(&txq->axq_lock); |
1022 | ||
1023 | if (bf_isampdu(bf)) | |
d43f3015 | 1024 | ath_tx_complete_aggr(sc, txq, bf, &bf_head, 0); |
e8324357 S |
1025 | else |
1026 | ath_tx_complete_buf(sc, bf, &bf_head, 0, 0); | |
f078f209 LR |
1027 | } |
1028 | ||
e8324357 S |
1029 | /* flush any pending frames if aggregation is enabled */ |
1030 | if (sc->sc_flags & SC_OP_TXAGGR) { | |
1031 | if (!retry_tx) { | |
1032 | spin_lock_bh(&txq->axq_lock); | |
1033 | ath_txq_drain_pending_buffers(sc, txq); | |
1034 | spin_unlock_bh(&txq->axq_lock); | |
1035 | } | |
1036 | } | |
f078f209 LR |
1037 | } |
1038 | ||
043a0405 | 1039 | void ath_drain_all_txq(struct ath_softc *sc, bool retry_tx) |
f078f209 | 1040 | { |
cbe61d8a | 1041 | struct ath_hw *ah = sc->sc_ah; |
043a0405 S |
1042 | struct ath_txq *txq; |
1043 | int i, npend = 0; | |
1044 | ||
1045 | if (sc->sc_flags & SC_OP_INVALID) | |
1046 | return; | |
1047 | ||
1048 | /* Stop beacon queue */ | |
1049 | ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq); | |
1050 | ||
1051 | /* Stop data queues */ | |
1052 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { | |
1053 | if (ATH_TXQ_SETUP(sc, i)) { | |
1054 | txq = &sc->tx.txq[i]; | |
1055 | ath9k_hw_stoptxdma(ah, txq->axq_qnum); | |
1056 | npend += ath9k_hw_numtxpending(ah, txq->axq_qnum); | |
1057 | } | |
1058 | } | |
1059 | ||
1060 | if (npend) { | |
1061 | int r; | |
1062 | ||
1063 | DPRINTF(sc, ATH_DBG_XMIT, "Unable to stop TxDMA. Reset HAL!\n"); | |
1064 | ||
1065 | spin_lock_bh(&sc->sc_resetlock); | |
2660b81a | 1066 | r = ath9k_hw_reset(ah, sc->sc_ah->curchan, true); |
043a0405 S |
1067 | if (r) |
1068 | DPRINTF(sc, ATH_DBG_FATAL, | |
6b45784f | 1069 | "Unable to reset hardware; reset status %d\n", |
043a0405 S |
1070 | r); |
1071 | spin_unlock_bh(&sc->sc_resetlock); | |
1072 | } | |
1073 | ||
1074 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { | |
1075 | if (ATH_TXQ_SETUP(sc, i)) | |
1076 | ath_draintxq(sc, &sc->tx.txq[i], retry_tx); | |
1077 | } | |
e8324357 | 1078 | } |
f078f209 | 1079 | |
043a0405 | 1080 | void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq) |
e8324357 | 1081 | { |
043a0405 S |
1082 | ath9k_hw_releasetxqueue(sc->sc_ah, txq->axq_qnum); |
1083 | sc->tx.txqsetup &= ~(1<<txq->axq_qnum); | |
e8324357 | 1084 | } |
f078f209 | 1085 | |
e8324357 S |
1086 | void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq) |
1087 | { | |
1088 | struct ath_atx_ac *ac; | |
1089 | struct ath_atx_tid *tid; | |
f078f209 | 1090 | |
e8324357 S |
1091 | if (list_empty(&txq->axq_acq)) |
1092 | return; | |
f078f209 | 1093 | |
e8324357 S |
1094 | ac = list_first_entry(&txq->axq_acq, struct ath_atx_ac, list); |
1095 | list_del(&ac->list); | |
1096 | ac->sched = false; | |
f078f209 | 1097 | |
e8324357 S |
1098 | do { |
1099 | if (list_empty(&ac->tid_q)) | |
1100 | return; | |
f078f209 | 1101 | |
e8324357 S |
1102 | tid = list_first_entry(&ac->tid_q, struct ath_atx_tid, list); |
1103 | list_del(&tid->list); | |
1104 | tid->sched = false; | |
f078f209 | 1105 | |
e8324357 S |
1106 | if (tid->paused) |
1107 | continue; | |
f078f209 | 1108 | |
e8324357 S |
1109 | if ((txq->axq_depth % 2) == 0) |
1110 | ath_tx_sched_aggr(sc, txq, tid); | |
f078f209 LR |
1111 | |
1112 | /* | |
e8324357 S |
1113 | * add tid to round-robin queue if more frames |
1114 | * are pending for the tid | |
f078f209 | 1115 | */ |
e8324357 S |
1116 | if (!list_empty(&tid->buf_q)) |
1117 | ath_tx_queue_tid(txq, tid); | |
f078f209 | 1118 | |
e8324357 S |
1119 | break; |
1120 | } while (!list_empty(&ac->tid_q)); | |
f078f209 | 1121 | |
e8324357 S |
1122 | if (!list_empty(&ac->tid_q)) { |
1123 | if (!ac->sched) { | |
1124 | ac->sched = true; | |
1125 | list_add_tail(&ac->list, &txq->axq_acq); | |
f078f209 | 1126 | } |
e8324357 S |
1127 | } |
1128 | } | |
f078f209 | 1129 | |
e8324357 S |
1130 | int ath_tx_setup(struct ath_softc *sc, int haltype) |
1131 | { | |
1132 | struct ath_txq *txq; | |
f078f209 | 1133 | |
e8324357 S |
1134 | if (haltype >= ARRAY_SIZE(sc->tx.hwq_map)) { |
1135 | DPRINTF(sc, ATH_DBG_FATAL, | |
1136 | "HAL AC %u out of range, max %zu!\n", | |
1137 | haltype, ARRAY_SIZE(sc->tx.hwq_map)); | |
1138 | return 0; | |
1139 | } | |
1140 | txq = ath_txq_setup(sc, ATH9K_TX_QUEUE_DATA, haltype); | |
1141 | if (txq != NULL) { | |
1142 | sc->tx.hwq_map[haltype] = txq->axq_qnum; | |
1143 | return 1; | |
1144 | } else | |
1145 | return 0; | |
f078f209 LR |
1146 | } |
1147 | ||
e8324357 S |
1148 | /***********/ |
1149 | /* TX, DMA */ | |
1150 | /***********/ | |
1151 | ||
f078f209 | 1152 | /* |
e8324357 S |
1153 | * Insert a chain of ath_buf (descriptors) on a txq and |
1154 | * assume the descriptors are already chained together by caller. | |
f078f209 | 1155 | */ |
e8324357 S |
1156 | static void ath_tx_txqaddbuf(struct ath_softc *sc, struct ath_txq *txq, |
1157 | struct list_head *head) | |
f078f209 | 1158 | { |
cbe61d8a | 1159 | struct ath_hw *ah = sc->sc_ah; |
e8324357 | 1160 | struct ath_buf *bf; |
f078f209 | 1161 | |
e8324357 S |
1162 | /* |
1163 | * Insert the frame on the outbound list and | |
1164 | * pass it on to the hardware. | |
1165 | */ | |
f078f209 | 1166 | |
e8324357 S |
1167 | if (list_empty(head)) |
1168 | return; | |
f078f209 | 1169 | |
e8324357 | 1170 | bf = list_first_entry(head, struct ath_buf, list); |
f078f209 | 1171 | |
e8324357 S |
1172 | list_splice_tail_init(head, &txq->axq_q); |
1173 | txq->axq_depth++; | |
1174 | txq->axq_totalqueued++; | |
1175 | txq->axq_linkbuf = list_entry(txq->axq_q.prev, struct ath_buf, list); | |
f078f209 | 1176 | |
e8324357 S |
1177 | DPRINTF(sc, ATH_DBG_QUEUE, |
1178 | "qnum: %d, txq depth: %d\n", txq->axq_qnum, txq->axq_depth); | |
f078f209 | 1179 | |
e8324357 S |
1180 | if (txq->axq_link == NULL) { |
1181 | ath9k_hw_puttxbuf(ah, txq->axq_qnum, bf->bf_daddr); | |
1182 | DPRINTF(sc, ATH_DBG_XMIT, | |
1183 | "TXDP[%u] = %llx (%p)\n", | |
1184 | txq->axq_qnum, ito64(bf->bf_daddr), bf->bf_desc); | |
1185 | } else { | |
1186 | *txq->axq_link = bf->bf_daddr; | |
1187 | DPRINTF(sc, ATH_DBG_XMIT, "link[%u] (%p)=%llx (%p)\n", | |
1188 | txq->axq_qnum, txq->axq_link, | |
1189 | ito64(bf->bf_daddr), bf->bf_desc); | |
1190 | } | |
1191 | txq->axq_link = &(bf->bf_lastbf->bf_desc->ds_link); | |
1192 | ath9k_hw_txstart(ah, txq->axq_qnum); | |
1193 | } | |
f078f209 | 1194 | |
e8324357 S |
1195 | static struct ath_buf *ath_tx_get_buffer(struct ath_softc *sc) |
1196 | { | |
1197 | struct ath_buf *bf = NULL; | |
f078f209 | 1198 | |
e8324357 | 1199 | spin_lock_bh(&sc->tx.txbuflock); |
f078f209 | 1200 | |
e8324357 S |
1201 | if (unlikely(list_empty(&sc->tx.txbuf))) { |
1202 | spin_unlock_bh(&sc->tx.txbuflock); | |
1203 | return NULL; | |
1204 | } | |
f078f209 | 1205 | |
e8324357 S |
1206 | bf = list_first_entry(&sc->tx.txbuf, struct ath_buf, list); |
1207 | list_del(&bf->list); | |
f078f209 | 1208 | |
e8324357 | 1209 | spin_unlock_bh(&sc->tx.txbuflock); |
f078f209 | 1210 | |
e8324357 | 1211 | return bf; |
f078f209 LR |
1212 | } |
1213 | ||
e8324357 S |
1214 | static void ath_tx_send_ampdu(struct ath_softc *sc, struct ath_atx_tid *tid, |
1215 | struct list_head *bf_head, | |
1216 | struct ath_tx_control *txctl) | |
f078f209 LR |
1217 | { |
1218 | struct ath_buf *bf; | |
f078f209 | 1219 | |
e8324357 S |
1220 | bf = list_first_entry(bf_head, struct ath_buf, list); |
1221 | bf->bf_state.bf_type |= BUF_AMPDU; | |
f078f209 | 1222 | |
e8324357 S |
1223 | /* |
1224 | * Do not queue to h/w when any of the following conditions is true: | |
1225 | * - there are pending frames in software queue | |
1226 | * - the TID is currently paused for ADDBA/BAR request | |
1227 | * - seqno is not within block-ack window | |
1228 | * - h/w queue depth exceeds low water mark | |
1229 | */ | |
1230 | if (!list_empty(&tid->buf_q) || tid->paused || | |
1231 | !BAW_WITHIN(tid->seq_start, tid->baw_size, bf->bf_seqno) || | |
1232 | txctl->txq->axq_depth >= ATH_AGGR_MIN_QDEPTH) { | |
f078f209 | 1233 | /* |
e8324357 S |
1234 | * Add this frame to software queue for scheduling later |
1235 | * for aggregation. | |
f078f209 | 1236 | */ |
d43f3015 | 1237 | list_move_tail(&bf->list, &tid->buf_q); |
e8324357 S |
1238 | ath_tx_queue_tid(txctl->txq, tid); |
1239 | return; | |
1240 | } | |
1241 | ||
1242 | /* Add sub-frame to BAW */ | |
1243 | ath_tx_addto_baw(sc, tid, bf); | |
1244 | ||
1245 | /* Queue to h/w without aggregation */ | |
1246 | bf->bf_nframes = 1; | |
d43f3015 | 1247 | bf->bf_lastbf = bf; |
e8324357 S |
1248 | ath_buf_set_rate(sc, bf); |
1249 | ath_tx_txqaddbuf(sc, txctl->txq, bf_head); | |
e8324357 S |
1250 | } |
1251 | ||
c37452b0 S |
1252 | static void ath_tx_send_ht_normal(struct ath_softc *sc, struct ath_txq *txq, |
1253 | struct ath_atx_tid *tid, | |
1254 | struct list_head *bf_head) | |
e8324357 S |
1255 | { |
1256 | struct ath_buf *bf; | |
1257 | ||
e8324357 S |
1258 | bf = list_first_entry(bf_head, struct ath_buf, list); |
1259 | bf->bf_state.bf_type &= ~BUF_AMPDU; | |
1260 | ||
1261 | /* update starting sequence number for subsequent ADDBA request */ | |
1262 | INCR(tid->seq_start, IEEE80211_SEQ_MAX); | |
1263 | ||
1264 | bf->bf_nframes = 1; | |
d43f3015 | 1265 | bf->bf_lastbf = bf; |
e8324357 S |
1266 | ath_buf_set_rate(sc, bf); |
1267 | ath_tx_txqaddbuf(sc, txq, bf_head); | |
1268 | } | |
1269 | ||
c37452b0 S |
1270 | static void ath_tx_send_normal(struct ath_softc *sc, struct ath_txq *txq, |
1271 | struct list_head *bf_head) | |
1272 | { | |
1273 | struct ath_buf *bf; | |
1274 | ||
1275 | bf = list_first_entry(bf_head, struct ath_buf, list); | |
1276 | ||
1277 | bf->bf_lastbf = bf; | |
1278 | bf->bf_nframes = 1; | |
1279 | ath_buf_set_rate(sc, bf); | |
1280 | ath_tx_txqaddbuf(sc, txq, bf_head); | |
1281 | } | |
1282 | ||
e8324357 S |
1283 | static enum ath9k_pkt_type get_hw_packet_type(struct sk_buff *skb) |
1284 | { | |
1285 | struct ieee80211_hdr *hdr; | |
1286 | enum ath9k_pkt_type htype; | |
1287 | __le16 fc; | |
1288 | ||
1289 | hdr = (struct ieee80211_hdr *)skb->data; | |
1290 | fc = hdr->frame_control; | |
1291 | ||
1292 | if (ieee80211_is_beacon(fc)) | |
1293 | htype = ATH9K_PKT_TYPE_BEACON; | |
1294 | else if (ieee80211_is_probe_resp(fc)) | |
1295 | htype = ATH9K_PKT_TYPE_PROBE_RESP; | |
1296 | else if (ieee80211_is_atim(fc)) | |
1297 | htype = ATH9K_PKT_TYPE_ATIM; | |
1298 | else if (ieee80211_is_pspoll(fc)) | |
1299 | htype = ATH9K_PKT_TYPE_PSPOLL; | |
1300 | else | |
1301 | htype = ATH9K_PKT_TYPE_NORMAL; | |
1302 | ||
1303 | return htype; | |
1304 | } | |
1305 | ||
1306 | static bool is_pae(struct sk_buff *skb) | |
1307 | { | |
1308 | struct ieee80211_hdr *hdr; | |
1309 | __le16 fc; | |
1310 | ||
1311 | hdr = (struct ieee80211_hdr *)skb->data; | |
1312 | fc = hdr->frame_control; | |
1313 | ||
1314 | if (ieee80211_is_data(fc)) { | |
1315 | if (ieee80211_is_nullfunc(fc) || | |
1316 | /* Port Access Entity (IEEE 802.1X) */ | |
1317 | (skb->protocol == cpu_to_be16(ETH_P_PAE))) { | |
1318 | return true; | |
1319 | } | |
1320 | } | |
1321 | ||
1322 | return false; | |
1323 | } | |
1324 | ||
1325 | static int get_hw_crypto_keytype(struct sk_buff *skb) | |
1326 | { | |
1327 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); | |
1328 | ||
1329 | if (tx_info->control.hw_key) { | |
1330 | if (tx_info->control.hw_key->alg == ALG_WEP) | |
1331 | return ATH9K_KEY_TYPE_WEP; | |
1332 | else if (tx_info->control.hw_key->alg == ALG_TKIP) | |
1333 | return ATH9K_KEY_TYPE_TKIP; | |
1334 | else if (tx_info->control.hw_key->alg == ALG_CCMP) | |
1335 | return ATH9K_KEY_TYPE_AES; | |
1336 | } | |
1337 | ||
1338 | return ATH9K_KEY_TYPE_CLEAR; | |
1339 | } | |
1340 | ||
1341 | static void assign_aggr_tid_seqno(struct sk_buff *skb, | |
1342 | struct ath_buf *bf) | |
1343 | { | |
1344 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); | |
1345 | struct ieee80211_hdr *hdr; | |
1346 | struct ath_node *an; | |
1347 | struct ath_atx_tid *tid; | |
1348 | __le16 fc; | |
1349 | u8 *qc; | |
1350 | ||
1351 | if (!tx_info->control.sta) | |
1352 | return; | |
1353 | ||
1354 | an = (struct ath_node *)tx_info->control.sta->drv_priv; | |
1355 | hdr = (struct ieee80211_hdr *)skb->data; | |
1356 | fc = hdr->frame_control; | |
1357 | ||
1358 | if (ieee80211_is_data_qos(fc)) { | |
1359 | qc = ieee80211_get_qos_ctl(hdr); | |
1360 | bf->bf_tidno = qc[0] & 0xf; | |
1361 | } | |
1362 | ||
1363 | /* | |
1364 | * For HT capable stations, we save tidno for later use. | |
1365 | * We also override seqno set by upper layer with the one | |
1366 | * in tx aggregation state. | |
1367 | * | |
1368 | * If fragmentation is on, the sequence number is | |
1369 | * not overridden, since it has been | |
1370 | * incremented by the fragmentation routine. | |
1371 | * | |
1372 | * FIXME: check if the fragmentation threshold exceeds | |
1373 | * IEEE80211 max. | |
1374 | */ | |
1375 | tid = ATH_AN_2_TID(an, bf->bf_tidno); | |
1376 | hdr->seq_ctrl = cpu_to_le16(tid->seq_next << | |
1377 | IEEE80211_SEQ_SEQ_SHIFT); | |
1378 | bf->bf_seqno = tid->seq_next; | |
1379 | INCR(tid->seq_next, IEEE80211_SEQ_MAX); | |
1380 | } | |
1381 | ||
1382 | static int setup_tx_flags(struct ath_softc *sc, struct sk_buff *skb, | |
1383 | struct ath_txq *txq) | |
1384 | { | |
1385 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); | |
1386 | int flags = 0; | |
1387 | ||
1388 | flags |= ATH9K_TXDESC_CLRDMASK; /* needed for crypto errors */ | |
1389 | flags |= ATH9K_TXDESC_INTREQ; | |
1390 | ||
1391 | if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK) | |
1392 | flags |= ATH9K_TXDESC_NOACK; | |
e8324357 S |
1393 | |
1394 | return flags; | |
1395 | } | |
1396 | ||
1397 | /* | |
1398 | * rix - rate index | |
1399 | * pktlen - total bytes (delims + data + fcs + pads + pad delims) | |
1400 | * width - 0 for 20 MHz, 1 for 40 MHz | |
1401 | * half_gi - to use 4us v/s 3.6 us for symbol time | |
1402 | */ | |
1403 | static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, struct ath_buf *bf, | |
1404 | int width, int half_gi, bool shortPreamble) | |
1405 | { | |
4f0fc7c3 | 1406 | const struct ath_rate_table *rate_table = sc->cur_rate_table; |
e8324357 S |
1407 | u32 nbits, nsymbits, duration, nsymbols; |
1408 | u8 rc; | |
1409 | int streams, pktlen; | |
1410 | ||
1411 | pktlen = bf_isaggr(bf) ? bf->bf_al : bf->bf_frmlen; | |
1412 | rc = rate_table->info[rix].ratecode; | |
1413 | ||
1414 | /* for legacy rates, use old function to compute packet duration */ | |
1415 | if (!IS_HT_RATE(rc)) | |
1416 | return ath9k_hw_computetxtime(sc->sc_ah, rate_table, pktlen, | |
1417 | rix, shortPreamble); | |
1418 | ||
1419 | /* find number of symbols: PLCP + data */ | |
1420 | nbits = (pktlen << 3) + OFDM_PLCP_BITS; | |
1421 | nsymbits = bits_per_symbol[HT_RC_2_MCS(rc)][width]; | |
1422 | nsymbols = (nbits + nsymbits - 1) / nsymbits; | |
1423 | ||
1424 | if (!half_gi) | |
1425 | duration = SYMBOL_TIME(nsymbols); | |
1426 | else | |
1427 | duration = SYMBOL_TIME_HALFGI(nsymbols); | |
1428 | ||
1429 | /* addup duration for legacy/ht training and signal fields */ | |
1430 | streams = HT_RC_2_STREAMS(rc); | |
1431 | duration += L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams); | |
1432 | ||
1433 | return duration; | |
1434 | } | |
1435 | ||
1436 | static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf) | |
1437 | { | |
4f0fc7c3 | 1438 | const struct ath_rate_table *rt = sc->cur_rate_table; |
e8324357 S |
1439 | struct ath9k_11n_rate_series series[4]; |
1440 | struct sk_buff *skb; | |
1441 | struct ieee80211_tx_info *tx_info; | |
1442 | struct ieee80211_tx_rate *rates; | |
254ad0ff | 1443 | struct ieee80211_hdr *hdr; |
c89424df S |
1444 | int i, flags = 0; |
1445 | u8 rix = 0, ctsrate = 0; | |
254ad0ff | 1446 | bool is_pspoll; |
e8324357 S |
1447 | |
1448 | memset(series, 0, sizeof(struct ath9k_11n_rate_series) * 4); | |
1449 | ||
a22be22a | 1450 | skb = bf->bf_mpdu; |
e8324357 S |
1451 | tx_info = IEEE80211_SKB_CB(skb); |
1452 | rates = tx_info->control.rates; | |
254ad0ff S |
1453 | hdr = (struct ieee80211_hdr *)skb->data; |
1454 | is_pspoll = ieee80211_is_pspoll(hdr->frame_control); | |
e8324357 | 1455 | |
e8324357 | 1456 | /* |
c89424df S |
1457 | * We check if Short Preamble is needed for the CTS rate by |
1458 | * checking the BSS's global flag. | |
1459 | * But for the rate series, IEEE80211_TX_RC_USE_SHORT_PREAMBLE is used. | |
e8324357 | 1460 | */ |
c89424df S |
1461 | if (sc->sc_flags & SC_OP_PREAMBLE_SHORT) |
1462 | ctsrate = rt->info[tx_info->control.rts_cts_rate_idx].ratecode | | |
1463 | rt->info[tx_info->control.rts_cts_rate_idx].short_preamble; | |
1464 | else | |
1465 | ctsrate = rt->info[tx_info->control.rts_cts_rate_idx].ratecode; | |
e8324357 | 1466 | |
c89424df S |
1467 | /* |
1468 | * ATH9K_TXDESC_RTSENA and ATH9K_TXDESC_CTSENA are mutually exclusive. | |
1469 | * Check the first rate in the series to decide whether RTS/CTS | |
1470 | * or CTS-to-self has to be used. | |
e8324357 | 1471 | */ |
c89424df S |
1472 | if (rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
1473 | flags = ATH9K_TXDESC_CTSENA; | |
1474 | else if (rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) | |
1475 | flags = ATH9K_TXDESC_RTSENA; | |
e8324357 | 1476 | |
c89424df | 1477 | /* FIXME: Handle aggregation protection */ |
17d7904d | 1478 | if (sc->config.ath_aggr_prot && |
e8324357 S |
1479 | (!bf_isaggr(bf) || (bf_isaggr(bf) && bf->bf_al < 8192))) { |
1480 | flags = ATH9K_TXDESC_RTSENA; | |
e8324357 S |
1481 | } |
1482 | ||
1483 | /* For AR5416 - RTS cannot be followed by a frame larger than 8K */ | |
2660b81a | 1484 | if (bf_isaggr(bf) && (bf->bf_al > sc->sc_ah->caps.rts_aggr_limit)) |
e8324357 S |
1485 | flags &= ~(ATH9K_TXDESC_RTSENA); |
1486 | ||
e8324357 S |
1487 | for (i = 0; i < 4; i++) { |
1488 | if (!rates[i].count || (rates[i].idx < 0)) | |
1489 | continue; | |
1490 | ||
1491 | rix = rates[i].idx; | |
e8324357 | 1492 | series[i].Tries = rates[i].count; |
17d7904d | 1493 | series[i].ChSel = sc->tx_chainmask; |
e8324357 | 1494 | |
c89424df S |
1495 | if (rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) |
1496 | series[i].Rate = rt->info[rix].ratecode | | |
1497 | rt->info[rix].short_preamble; | |
1498 | else | |
1499 | series[i].Rate = rt->info[rix].ratecode; | |
1500 | ||
1501 | if (rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) | |
1502 | series[i].RateFlags |= ATH9K_RATESERIES_RTS_CTS; | |
1503 | if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) | |
1504 | series[i].RateFlags |= ATH9K_RATESERIES_2040; | |
1505 | if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI) | |
1506 | series[i].RateFlags |= ATH9K_RATESERIES_HALFGI; | |
e8324357 S |
1507 | |
1508 | series[i].PktDuration = ath_pkt_duration(sc, rix, bf, | |
1509 | (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) != 0, | |
1510 | (rates[i].flags & IEEE80211_TX_RC_SHORT_GI), | |
c89424df | 1511 | (rates[i].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)); |
f078f209 LR |
1512 | } |
1513 | ||
e8324357 | 1514 | /* set dur_update_en for l-sig computation except for PS-Poll frames */ |
c89424df S |
1515 | ath9k_hw_set11n_ratescenario(sc->sc_ah, bf->bf_desc, |
1516 | bf->bf_lastbf->bf_desc, | |
254ad0ff | 1517 | !is_pspoll, ctsrate, |
c89424df | 1518 | 0, series, 4, flags); |
f078f209 | 1519 | |
17d7904d | 1520 | if (sc->config.ath_aggr_prot && flags) |
c89424df | 1521 | ath9k_hw_set11n_burstduration(sc->sc_ah, bf->bf_desc, 8192); |
f078f209 LR |
1522 | } |
1523 | ||
c52f33d0 | 1524 | static int ath_tx_setup_buffer(struct ieee80211_hw *hw, struct ath_buf *bf, |
8f93b8b3 | 1525 | struct sk_buff *skb, |
528f0c6b | 1526 | struct ath_tx_control *txctl) |
f078f209 | 1527 | { |
c52f33d0 JM |
1528 | struct ath_wiphy *aphy = hw->priv; |
1529 | struct ath_softc *sc = aphy->sc; | |
528f0c6b S |
1530 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
1531 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
f078f209 | 1532 | struct ath_tx_info_priv *tx_info_priv; |
528f0c6b S |
1533 | int hdrlen; |
1534 | __le16 fc; | |
e022edbd | 1535 | |
c112d0c5 LR |
1536 | tx_info_priv = kzalloc(sizeof(*tx_info_priv), GFP_ATOMIC); |
1537 | if (unlikely(!tx_info_priv)) | |
1538 | return -ENOMEM; | |
a8efee4f | 1539 | tx_info->rate_driver_data[0] = tx_info_priv; |
c52f33d0 | 1540 | tx_info_priv->aphy = aphy; |
f0ed85c6 | 1541 | tx_info_priv->frame_type = txctl->frame_type; |
528f0c6b S |
1542 | hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
1543 | fc = hdr->frame_control; | |
f078f209 | 1544 | |
528f0c6b | 1545 | ATH_TXBUF_RESET(bf); |
f078f209 | 1546 | |
528f0c6b | 1547 | bf->bf_frmlen = skb->len + FCS_LEN - (hdrlen & 3); |
cd3d39a6 | 1548 | |
c37452b0 | 1549 | if (conf_is_ht(&sc->hw->conf) && !is_pae(skb)) |
c656bbb5 | 1550 | bf->bf_state.bf_type |= BUF_HT; |
528f0c6b S |
1551 | |
1552 | bf->bf_flags = setup_tx_flags(sc, skb, txctl->txq); | |
1553 | ||
528f0c6b | 1554 | bf->bf_keytype = get_hw_crypto_keytype(skb); |
528f0c6b S |
1555 | if (bf->bf_keytype != ATH9K_KEY_TYPE_CLEAR) { |
1556 | bf->bf_frmlen += tx_info->control.hw_key->icv_len; | |
1557 | bf->bf_keyix = tx_info->control.hw_key->hw_key_idx; | |
1558 | } else { | |
1559 | bf->bf_keyix = ATH9K_TXKEYIX_INVALID; | |
1560 | } | |
1561 | ||
d3a1db1c | 1562 | if (ieee80211_is_data_qos(fc) && (sc->sc_flags & SC_OP_TXAGGR)) |
528f0c6b S |
1563 | assign_aggr_tid_seqno(skb, bf); |
1564 | ||
f078f209 | 1565 | bf->bf_mpdu = skb; |
f8316df1 | 1566 | |
7da3c55c GJ |
1567 | bf->bf_dmacontext = dma_map_single(sc->dev, skb->data, |
1568 | skb->len, DMA_TO_DEVICE); | |
1569 | if (unlikely(dma_mapping_error(sc->dev, bf->bf_dmacontext))) { | |
f8316df1 | 1570 | bf->bf_mpdu = NULL; |
675902ef S |
1571 | kfree(tx_info_priv); |
1572 | tx_info->rate_driver_data[0] = NULL; | |
1573 | DPRINTF(sc, ATH_DBG_FATAL, "dma_mapping_error() on TX\n"); | |
f8316df1 LR |
1574 | return -ENOMEM; |
1575 | } | |
1576 | ||
528f0c6b | 1577 | bf->bf_buf_addr = bf->bf_dmacontext; |
f8316df1 | 1578 | return 0; |
528f0c6b S |
1579 | } |
1580 | ||
1581 | /* FIXME: tx power */ | |
1582 | static void ath_tx_start_dma(struct ath_softc *sc, struct ath_buf *bf, | |
528f0c6b S |
1583 | struct ath_tx_control *txctl) |
1584 | { | |
a22be22a | 1585 | struct sk_buff *skb = bf->bf_mpdu; |
528f0c6b | 1586 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
c37452b0 | 1587 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
528f0c6b S |
1588 | struct ath_node *an = NULL; |
1589 | struct list_head bf_head; | |
1590 | struct ath_desc *ds; | |
1591 | struct ath_atx_tid *tid; | |
cbe61d8a | 1592 | struct ath_hw *ah = sc->sc_ah; |
528f0c6b | 1593 | int frm_type; |
c37452b0 | 1594 | __le16 fc; |
528f0c6b | 1595 | |
528f0c6b | 1596 | frm_type = get_hw_packet_type(skb); |
c37452b0 | 1597 | fc = hdr->frame_control; |
528f0c6b S |
1598 | |
1599 | INIT_LIST_HEAD(&bf_head); | |
1600 | list_add_tail(&bf->list, &bf_head); | |
f078f209 | 1601 | |
f078f209 LR |
1602 | ds = bf->bf_desc; |
1603 | ds->ds_link = 0; | |
1604 | ds->ds_data = bf->bf_buf_addr; | |
1605 | ||
528f0c6b S |
1606 | ath9k_hw_set11n_txdesc(ah, ds, bf->bf_frmlen, frm_type, MAX_RATE_POWER, |
1607 | bf->bf_keyix, bf->bf_keytype, bf->bf_flags); | |
1608 | ||
1609 | ath9k_hw_filltxdesc(ah, ds, | |
8f93b8b3 S |
1610 | skb->len, /* segment length */ |
1611 | true, /* first segment */ | |
1612 | true, /* last segment */ | |
1613 | ds); /* first descriptor */ | |
f078f209 | 1614 | |
528f0c6b | 1615 | spin_lock_bh(&txctl->txq->axq_lock); |
f078f209 | 1616 | |
f1617967 JL |
1617 | if (bf_isht(bf) && (sc->sc_flags & SC_OP_TXAGGR) && |
1618 | tx_info->control.sta) { | |
1619 | an = (struct ath_node *)tx_info->control.sta->drv_priv; | |
1620 | tid = ATH_AN_2_TID(an, bf->bf_tidno); | |
1621 | ||
c37452b0 S |
1622 | if (!ieee80211_is_data_qos(fc)) { |
1623 | ath_tx_send_normal(sc, txctl->txq, &bf_head); | |
1624 | goto tx_done; | |
1625 | } | |
1626 | ||
089e698d | 1627 | if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) { |
f078f209 LR |
1628 | /* |
1629 | * Try aggregation if it's a unicast data frame | |
1630 | * and the destination is HT capable. | |
1631 | */ | |
528f0c6b | 1632 | ath_tx_send_ampdu(sc, tid, &bf_head, txctl); |
f078f209 LR |
1633 | } else { |
1634 | /* | |
528f0c6b S |
1635 | * Send this frame as regular when ADDBA |
1636 | * exchange is neither complete nor pending. | |
f078f209 | 1637 | */ |
c37452b0 S |
1638 | ath_tx_send_ht_normal(sc, txctl->txq, |
1639 | tid, &bf_head); | |
f078f209 LR |
1640 | } |
1641 | } else { | |
c37452b0 | 1642 | ath_tx_send_normal(sc, txctl->txq, &bf_head); |
f078f209 | 1643 | } |
528f0c6b | 1644 | |
c37452b0 | 1645 | tx_done: |
528f0c6b | 1646 | spin_unlock_bh(&txctl->txq->axq_lock); |
f078f209 LR |
1647 | } |
1648 | ||
f8316df1 | 1649 | /* Upon failure caller should free skb */ |
c52f33d0 | 1650 | int ath_tx_start(struct ieee80211_hw *hw, struct sk_buff *skb, |
528f0c6b | 1651 | struct ath_tx_control *txctl) |
f078f209 | 1652 | { |
c52f33d0 JM |
1653 | struct ath_wiphy *aphy = hw->priv; |
1654 | struct ath_softc *sc = aphy->sc; | |
528f0c6b | 1655 | struct ath_buf *bf; |
f8316df1 | 1656 | int r; |
f078f209 | 1657 | |
528f0c6b S |
1658 | bf = ath_tx_get_buffer(sc); |
1659 | if (!bf) { | |
04bd4638 | 1660 | DPRINTF(sc, ATH_DBG_XMIT, "TX buffers are full\n"); |
528f0c6b S |
1661 | return -1; |
1662 | } | |
1663 | ||
c52f33d0 | 1664 | r = ath_tx_setup_buffer(hw, bf, skb, txctl); |
f8316df1 | 1665 | if (unlikely(r)) { |
c112d0c5 LR |
1666 | struct ath_txq *txq = txctl->txq; |
1667 | ||
f8316df1 | 1668 | DPRINTF(sc, ATH_DBG_FATAL, "TX mem alloc failure\n"); |
c112d0c5 LR |
1669 | |
1670 | /* upon ath_tx_processq() this TX queue will be resumed, we | |
1671 | * guarantee this will happen by knowing beforehand that | |
1672 | * we will at least have to run TX completionon one buffer | |
1673 | * on the queue */ | |
1674 | spin_lock_bh(&txq->axq_lock); | |
f7a99e46 | 1675 | if (sc->tx.txq[txq->axq_qnum].axq_depth > 1) { |
c112d0c5 LR |
1676 | ieee80211_stop_queue(sc->hw, |
1677 | skb_get_queue_mapping(skb)); | |
1678 | txq->stopped = 1; | |
1679 | } | |
1680 | spin_unlock_bh(&txq->axq_lock); | |
1681 | ||
b77f483f S |
1682 | spin_lock_bh(&sc->tx.txbuflock); |
1683 | list_add_tail(&bf->list, &sc->tx.txbuf); | |
1684 | spin_unlock_bh(&sc->tx.txbuflock); | |
c112d0c5 | 1685 | |
f8316df1 LR |
1686 | return r; |
1687 | } | |
1688 | ||
8f93b8b3 | 1689 | ath_tx_start_dma(sc, bf, txctl); |
f078f209 | 1690 | |
528f0c6b | 1691 | return 0; |
f078f209 LR |
1692 | } |
1693 | ||
c52f33d0 | 1694 | void ath_tx_cabq(struct ieee80211_hw *hw, struct sk_buff *skb) |
f078f209 | 1695 | { |
c52f33d0 JM |
1696 | struct ath_wiphy *aphy = hw->priv; |
1697 | struct ath_softc *sc = aphy->sc; | |
e8324357 S |
1698 | int hdrlen, padsize; |
1699 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1700 | struct ath_tx_control txctl; | |
f078f209 | 1701 | |
e8324357 | 1702 | memset(&txctl, 0, sizeof(struct ath_tx_control)); |
f078f209 LR |
1703 | |
1704 | /* | |
e8324357 S |
1705 | * As a temporary workaround, assign seq# here; this will likely need |
1706 | * to be cleaned up to work better with Beacon transmission and virtual | |
1707 | * BSSes. | |
f078f209 | 1708 | */ |
e8324357 S |
1709 | if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { |
1710 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
1711 | if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) | |
1712 | sc->tx.seq_no += 0x10; | |
1713 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); | |
1714 | hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no); | |
f078f209 | 1715 | } |
f078f209 | 1716 | |
e8324357 S |
1717 | /* Add the padding after the header if this is not already done */ |
1718 | hdrlen = ieee80211_get_hdrlen_from_skb(skb); | |
1719 | if (hdrlen & 3) { | |
1720 | padsize = hdrlen % 4; | |
1721 | if (skb_headroom(skb) < padsize) { | |
1722 | DPRINTF(sc, ATH_DBG_XMIT, "TX CABQ padding failed\n"); | |
1723 | dev_kfree_skb_any(skb); | |
1724 | return; | |
1725 | } | |
1726 | skb_push(skb, padsize); | |
1727 | memmove(skb->data, skb->data + padsize, hdrlen); | |
f078f209 | 1728 | } |
f078f209 | 1729 | |
e8324357 | 1730 | txctl.txq = sc->beacon.cabq; |
f078f209 | 1731 | |
e8324357 | 1732 | DPRINTF(sc, ATH_DBG_XMIT, "transmitting CABQ packet, skb: %p\n", skb); |
f078f209 | 1733 | |
c52f33d0 | 1734 | if (ath_tx_start(hw, skb, &txctl) != 0) { |
e8324357 S |
1735 | DPRINTF(sc, ATH_DBG_XMIT, "CABQ TX failed\n"); |
1736 | goto exit; | |
f078f209 | 1737 | } |
f078f209 | 1738 | |
e8324357 S |
1739 | return; |
1740 | exit: | |
1741 | dev_kfree_skb_any(skb); | |
f078f209 LR |
1742 | } |
1743 | ||
e8324357 S |
1744 | /*****************/ |
1745 | /* TX Completion */ | |
1746 | /*****************/ | |
528f0c6b | 1747 | |
e8324357 | 1748 | static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb, |
6b2c4032 | 1749 | int tx_flags) |
528f0c6b | 1750 | { |
e8324357 S |
1751 | struct ieee80211_hw *hw = sc->hw; |
1752 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); | |
1753 | struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info); | |
1754 | int hdrlen, padsize; | |
f0ed85c6 | 1755 | int frame_type = ATH9K_NOT_INTERNAL; |
528f0c6b | 1756 | |
e8324357 | 1757 | DPRINTF(sc, ATH_DBG_XMIT, "TX complete: skb: %p\n", skb); |
528f0c6b | 1758 | |
f0ed85c6 | 1759 | if (tx_info_priv) { |
c52f33d0 | 1760 | hw = tx_info_priv->aphy->hw; |
f0ed85c6 JM |
1761 | frame_type = tx_info_priv->frame_type; |
1762 | } | |
c52f33d0 | 1763 | |
e8324357 S |
1764 | if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK || |
1765 | tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED) { | |
1766 | kfree(tx_info_priv); | |
1767 | tx_info->rate_driver_data[0] = NULL; | |
1768 | } | |
528f0c6b | 1769 | |
6b2c4032 | 1770 | if (tx_flags & ATH_TX_BAR) |
e8324357 | 1771 | tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; |
e8324357 | 1772 | |
6b2c4032 | 1773 | if (!(tx_flags & (ATH_TX_ERROR | ATH_TX_XRETRY))) { |
e8324357 S |
1774 | /* Frame was ACKed */ |
1775 | tx_info->flags |= IEEE80211_TX_STAT_ACK; | |
528f0c6b S |
1776 | } |
1777 | ||
e8324357 S |
1778 | hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
1779 | padsize = hdrlen & 3; | |
1780 | if (padsize && hdrlen >= 24) { | |
1781 | /* | |
1782 | * Remove MAC header padding before giving the frame back to | |
1783 | * mac80211. | |
1784 | */ | |
1785 | memmove(skb->data + padsize, skb->data, hdrlen); | |
1786 | skb_pull(skb, padsize); | |
1787 | } | |
528f0c6b | 1788 | |
9a23f9ca JM |
1789 | if (sc->sc_flags & SC_OP_WAIT_FOR_TX_ACK) { |
1790 | sc->sc_flags &= ~SC_OP_WAIT_FOR_TX_ACK; | |
1791 | DPRINTF(sc, ATH_DBG_PS, "Going back to sleep after having " | |
1792 | "received TX status (0x%x)\n", | |
1793 | sc->sc_flags & (SC_OP_WAIT_FOR_BEACON | | |
1794 | SC_OP_WAIT_FOR_CAB | | |
1795 | SC_OP_WAIT_FOR_PSPOLL_DATA | | |
1796 | SC_OP_WAIT_FOR_TX_ACK)); | |
1797 | } | |
1798 | ||
f0ed85c6 JM |
1799 | if (frame_type == ATH9K_NOT_INTERNAL) |
1800 | ieee80211_tx_status(hw, skb); | |
1801 | else | |
1802 | ath9k_tx_status(hw, skb); | |
e8324357 | 1803 | } |
f078f209 | 1804 | |
e8324357 S |
1805 | static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf, |
1806 | struct list_head *bf_q, | |
1807 | int txok, int sendbar) | |
f078f209 | 1808 | { |
e8324357 | 1809 | struct sk_buff *skb = bf->bf_mpdu; |
e8324357 | 1810 | unsigned long flags; |
6b2c4032 | 1811 | int tx_flags = 0; |
f078f209 | 1812 | |
f078f209 | 1813 | |
e8324357 | 1814 | if (sendbar) |
6b2c4032 | 1815 | tx_flags = ATH_TX_BAR; |
f078f209 | 1816 | |
e8324357 | 1817 | if (!txok) { |
6b2c4032 | 1818 | tx_flags |= ATH_TX_ERROR; |
f078f209 | 1819 | |
e8324357 | 1820 | if (bf_isxretried(bf)) |
6b2c4032 | 1821 | tx_flags |= ATH_TX_XRETRY; |
f078f209 LR |
1822 | } |
1823 | ||
e8324357 | 1824 | dma_unmap_single(sc->dev, bf->bf_dmacontext, skb->len, DMA_TO_DEVICE); |
6b2c4032 | 1825 | ath_tx_complete(sc, skb, tx_flags); |
e8324357 S |
1826 | |
1827 | /* | |
1828 | * Return the list of ath_buf of this mpdu to free queue | |
1829 | */ | |
1830 | spin_lock_irqsave(&sc->tx.txbuflock, flags); | |
1831 | list_splice_tail_init(bf_q, &sc->tx.txbuf); | |
1832 | spin_unlock_irqrestore(&sc->tx.txbuflock, flags); | |
f078f209 LR |
1833 | } |
1834 | ||
e8324357 S |
1835 | static int ath_tx_num_badfrms(struct ath_softc *sc, struct ath_buf *bf, |
1836 | int txok) | |
f078f209 | 1837 | { |
e8324357 S |
1838 | struct ath_buf *bf_last = bf->bf_lastbf; |
1839 | struct ath_desc *ds = bf_last->bf_desc; | |
1840 | u16 seq_st = 0; | |
1841 | u32 ba[WME_BA_BMP_SIZE >> 5]; | |
1842 | int ba_index; | |
1843 | int nbad = 0; | |
1844 | int isaggr = 0; | |
f078f209 | 1845 | |
e8324357 S |
1846 | if (ds->ds_txstat.ts_flags == ATH9K_TX_SW_ABORTED) |
1847 | return 0; | |
f078f209 | 1848 | |
e8324357 S |
1849 | isaggr = bf_isaggr(bf); |
1850 | if (isaggr) { | |
1851 | seq_st = ATH_DS_BA_SEQ(ds); | |
1852 | memcpy(ba, ATH_DS_BA_BITMAP(ds), WME_BA_BMP_SIZE >> 3); | |
1853 | } | |
f078f209 | 1854 | |
e8324357 S |
1855 | while (bf) { |
1856 | ba_index = ATH_BA_INDEX(seq_st, bf->bf_seqno); | |
1857 | if (!txok || (isaggr && !ATH_BA_ISSET(ba, ba_index))) | |
1858 | nbad++; | |
1859 | ||
1860 | bf = bf->bf_next; | |
1861 | } | |
f078f209 | 1862 | |
e8324357 S |
1863 | return nbad; |
1864 | } | |
f078f209 | 1865 | |
95e4acb7 | 1866 | static void ath_tx_rc_status(struct ath_buf *bf, struct ath_desc *ds, |
8a92e2ee | 1867 | int nbad, int txok, bool update_rc) |
f078f209 | 1868 | { |
a22be22a | 1869 | struct sk_buff *skb = bf->bf_mpdu; |
254ad0ff | 1870 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; |
e8324357 S |
1871 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
1872 | struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info); | |
8a92e2ee VT |
1873 | struct ieee80211_hw *hw = tx_info_priv->aphy->hw; |
1874 | u8 i, tx_rateindex; | |
f078f209 | 1875 | |
95e4acb7 S |
1876 | if (txok) |
1877 | tx_info->status.ack_signal = ds->ds_txstat.ts_rssi; | |
1878 | ||
8a92e2ee VT |
1879 | tx_rateindex = ds->ds_txstat.ts_rateindex; |
1880 | WARN_ON(tx_rateindex >= hw->max_rates); | |
1881 | ||
1882 | tx_info_priv->update_rc = update_rc; | |
e8324357 S |
1883 | if (ds->ds_txstat.ts_status & ATH9K_TXERR_FILT) |
1884 | tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED; | |
f078f209 | 1885 | |
e8324357 | 1886 | if ((ds->ds_txstat.ts_status & ATH9K_TXERR_FILT) == 0 && |
8a92e2ee | 1887 | (bf->bf_flags & ATH9K_TXDESC_NOACK) == 0 && update_rc) { |
254ad0ff | 1888 | if (ieee80211_is_data(hdr->frame_control)) { |
e8324357 S |
1889 | memcpy(&tx_info_priv->tx, &ds->ds_txstat, |
1890 | sizeof(tx_info_priv->tx)); | |
1891 | tx_info_priv->n_frames = bf->bf_nframes; | |
1892 | tx_info_priv->n_bad_frames = nbad; | |
e8324357 | 1893 | } |
f078f209 | 1894 | } |
8a92e2ee VT |
1895 | |
1896 | for (i = tx_rateindex + 1; i < hw->max_rates; i++) | |
1897 | tx_info->status.rates[i].count = 0; | |
1898 | ||
1899 | tx_info->status.rates[tx_rateindex].count = bf->bf_retries + 1; | |
f078f209 LR |
1900 | } |
1901 | ||
059d806c S |
1902 | static void ath_wake_mac80211_queue(struct ath_softc *sc, struct ath_txq *txq) |
1903 | { | |
1904 | int qnum; | |
1905 | ||
1906 | spin_lock_bh(&txq->axq_lock); | |
1907 | if (txq->stopped && | |
f7a99e46 | 1908 | sc->tx.txq[txq->axq_qnum].axq_depth <= (ATH_TXBUF - 20)) { |
059d806c S |
1909 | qnum = ath_get_mac80211_qnum(txq->axq_qnum, sc); |
1910 | if (qnum != -1) { | |
1911 | ieee80211_wake_queue(sc->hw, qnum); | |
1912 | txq->stopped = 0; | |
1913 | } | |
1914 | } | |
1915 | spin_unlock_bh(&txq->axq_lock); | |
1916 | } | |
1917 | ||
e8324357 | 1918 | static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq) |
f078f209 | 1919 | { |
cbe61d8a | 1920 | struct ath_hw *ah = sc->sc_ah; |
e8324357 | 1921 | struct ath_buf *bf, *lastbf, *bf_held = NULL; |
f078f209 | 1922 | struct list_head bf_head; |
e8324357 | 1923 | struct ath_desc *ds; |
0934af23 | 1924 | int txok; |
e8324357 | 1925 | int status; |
f078f209 | 1926 | |
e8324357 S |
1927 | DPRINTF(sc, ATH_DBG_QUEUE, "tx queue %d (%x), link %p\n", |
1928 | txq->axq_qnum, ath9k_hw_gettxbuf(sc->sc_ah, txq->axq_qnum), | |
1929 | txq->axq_link); | |
f078f209 | 1930 | |
f078f209 LR |
1931 | for (;;) { |
1932 | spin_lock_bh(&txq->axq_lock); | |
f078f209 LR |
1933 | if (list_empty(&txq->axq_q)) { |
1934 | txq->axq_link = NULL; | |
1935 | txq->axq_linkbuf = NULL; | |
1936 | spin_unlock_bh(&txq->axq_lock); | |
1937 | break; | |
1938 | } | |
f078f209 LR |
1939 | bf = list_first_entry(&txq->axq_q, struct ath_buf, list); |
1940 | ||
e8324357 S |
1941 | /* |
1942 | * There is a race condition that a BH gets scheduled | |
1943 | * after sw writes TxE and before hw re-load the last | |
1944 | * descriptor to get the newly chained one. | |
1945 | * Software must keep the last DONE descriptor as a | |
1946 | * holding descriptor - software does so by marking | |
1947 | * it with the STALE flag. | |
1948 | */ | |
1949 | bf_held = NULL; | |
a119cc49 | 1950 | if (bf->bf_stale) { |
e8324357 S |
1951 | bf_held = bf; |
1952 | if (list_is_last(&bf_held->list, &txq->axq_q)) { | |
6ef9b13d S |
1953 | txq->axq_link = NULL; |
1954 | txq->axq_linkbuf = NULL; | |
1955 | spin_unlock_bh(&txq->axq_lock); | |
1956 | ||
1957 | /* | |
e8324357 S |
1958 | * The holding descriptor is the last |
1959 | * descriptor in queue. It's safe to remove | |
1960 | * the last holding descriptor in BH context. | |
1961 | */ | |
6ef9b13d S |
1962 | spin_lock_bh(&sc->tx.txbuflock); |
1963 | list_move_tail(&bf_held->list, &sc->tx.txbuf); | |
1964 | spin_unlock_bh(&sc->tx.txbuflock); | |
1965 | ||
e8324357 S |
1966 | break; |
1967 | } else { | |
1968 | bf = list_entry(bf_held->list.next, | |
6ef9b13d | 1969 | struct ath_buf, list); |
e8324357 | 1970 | } |
f078f209 LR |
1971 | } |
1972 | ||
1973 | lastbf = bf->bf_lastbf; | |
e8324357 | 1974 | ds = lastbf->bf_desc; |
f078f209 | 1975 | |
e8324357 S |
1976 | status = ath9k_hw_txprocdesc(ah, ds); |
1977 | if (status == -EINPROGRESS) { | |
f078f209 | 1978 | spin_unlock_bh(&txq->axq_lock); |
e8324357 | 1979 | break; |
f078f209 | 1980 | } |
e8324357 S |
1981 | if (bf->bf_desc == txq->axq_lastdsWithCTS) |
1982 | txq->axq_lastdsWithCTS = NULL; | |
1983 | if (ds == txq->axq_gatingds) | |
1984 | txq->axq_gatingds = NULL; | |
f078f209 | 1985 | |
e8324357 S |
1986 | /* |
1987 | * Remove ath_buf's of the same transmit unit from txq, | |
1988 | * however leave the last descriptor back as the holding | |
1989 | * descriptor for hw. | |
1990 | */ | |
a119cc49 | 1991 | lastbf->bf_stale = true; |
e8324357 | 1992 | INIT_LIST_HEAD(&bf_head); |
e8324357 S |
1993 | if (!list_is_singular(&lastbf->list)) |
1994 | list_cut_position(&bf_head, | |
1995 | &txq->axq_q, lastbf->list.prev); | |
f078f209 | 1996 | |
e8324357 | 1997 | txq->axq_depth--; |
e8324357 S |
1998 | if (bf_isaggr(bf)) |
1999 | txq->axq_aggr_depth--; | |
f078f209 | 2000 | |
e8324357 | 2001 | txok = (ds->ds_txstat.ts_status == 0); |
e8324357 | 2002 | spin_unlock_bh(&txq->axq_lock); |
f078f209 | 2003 | |
e8324357 | 2004 | if (bf_held) { |
e8324357 | 2005 | spin_lock_bh(&sc->tx.txbuflock); |
6ef9b13d | 2006 | list_move_tail(&bf_held->list, &sc->tx.txbuf); |
e8324357 S |
2007 | spin_unlock_bh(&sc->tx.txbuflock); |
2008 | } | |
f078f209 | 2009 | |
e8324357 S |
2010 | if (!bf_isampdu(bf)) { |
2011 | /* | |
2012 | * This frame is sent out as a single frame. | |
2013 | * Use hardware retry status for this frame. | |
2014 | */ | |
2015 | bf->bf_retries = ds->ds_txstat.ts_longretry; | |
2016 | if (ds->ds_txstat.ts_status & ATH9K_TXERR_XRETRY) | |
2017 | bf->bf_state.bf_type |= BUF_XRETRY; | |
8a92e2ee | 2018 | ath_tx_rc_status(bf, ds, 0, txok, true); |
e8324357 | 2019 | } |
f078f209 | 2020 | |
e8324357 | 2021 | if (bf_isampdu(bf)) |
d43f3015 | 2022 | ath_tx_complete_aggr(sc, txq, bf, &bf_head, txok); |
e8324357 S |
2023 | else |
2024 | ath_tx_complete_buf(sc, bf, &bf_head, txok, 0); | |
8469cdef | 2025 | |
059d806c | 2026 | ath_wake_mac80211_queue(sc, txq); |
8469cdef | 2027 | |
059d806c | 2028 | spin_lock_bh(&txq->axq_lock); |
e8324357 S |
2029 | if (sc->sc_flags & SC_OP_TXAGGR) |
2030 | ath_txq_schedule(sc, txq); | |
2031 | spin_unlock_bh(&txq->axq_lock); | |
8469cdef S |
2032 | } |
2033 | } | |
2034 | ||
f078f209 | 2035 | |
e8324357 | 2036 | void ath_tx_tasklet(struct ath_softc *sc) |
f078f209 | 2037 | { |
e8324357 S |
2038 | int i; |
2039 | u32 qcumask = ((1 << ATH9K_NUM_TX_QUEUES) - 1); | |
f078f209 | 2040 | |
e8324357 | 2041 | ath9k_hw_gettxintrtxqs(sc->sc_ah, &qcumask); |
f078f209 | 2042 | |
e8324357 S |
2043 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { |
2044 | if (ATH_TXQ_SETUP(sc, i) && (qcumask & (1 << i))) | |
2045 | ath_tx_processq(sc, &sc->tx.txq[i]); | |
f078f209 LR |
2046 | } |
2047 | } | |
2048 | ||
e8324357 S |
2049 | /*****************/ |
2050 | /* Init, Cleanup */ | |
2051 | /*****************/ | |
f078f209 | 2052 | |
e8324357 | 2053 | int ath_tx_init(struct ath_softc *sc, int nbufs) |
f078f209 | 2054 | { |
e8324357 | 2055 | int error = 0; |
f078f209 | 2056 | |
797fe5cb | 2057 | spin_lock_init(&sc->tx.txbuflock); |
f078f209 | 2058 | |
797fe5cb S |
2059 | error = ath_descdma_setup(sc, &sc->tx.txdma, &sc->tx.txbuf, |
2060 | "tx", nbufs, 1); | |
2061 | if (error != 0) { | |
2062 | DPRINTF(sc, ATH_DBG_FATAL, | |
2063 | "Failed to allocate tx descriptors: %d\n", error); | |
2064 | goto err; | |
2065 | } | |
f078f209 | 2066 | |
797fe5cb S |
2067 | error = ath_descdma_setup(sc, &sc->beacon.bdma, &sc->beacon.bbuf, |
2068 | "beacon", ATH_BCBUF, 1); | |
2069 | if (error != 0) { | |
2070 | DPRINTF(sc, ATH_DBG_FATAL, | |
2071 | "Failed to allocate beacon descriptors: %d\n", error); | |
2072 | goto err; | |
2073 | } | |
f078f209 | 2074 | |
797fe5cb | 2075 | err: |
e8324357 S |
2076 | if (error != 0) |
2077 | ath_tx_cleanup(sc); | |
f078f209 | 2078 | |
e8324357 | 2079 | return error; |
f078f209 LR |
2080 | } |
2081 | ||
797fe5cb | 2082 | void ath_tx_cleanup(struct ath_softc *sc) |
e8324357 S |
2083 | { |
2084 | if (sc->beacon.bdma.dd_desc_len != 0) | |
2085 | ath_descdma_cleanup(sc, &sc->beacon.bdma, &sc->beacon.bbuf); | |
2086 | ||
2087 | if (sc->tx.txdma.dd_desc_len != 0) | |
2088 | ath_descdma_cleanup(sc, &sc->tx.txdma, &sc->tx.txbuf); | |
e8324357 | 2089 | } |
f078f209 LR |
2090 | |
2091 | void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an) | |
2092 | { | |
c5170163 S |
2093 | struct ath_atx_tid *tid; |
2094 | struct ath_atx_ac *ac; | |
2095 | int tidno, acno; | |
f078f209 | 2096 | |
8ee5afbc | 2097 | for (tidno = 0, tid = &an->tid[tidno]; |
c5170163 S |
2098 | tidno < WME_NUM_TID; |
2099 | tidno++, tid++) { | |
2100 | tid->an = an; | |
2101 | tid->tidno = tidno; | |
2102 | tid->seq_start = tid->seq_next = 0; | |
2103 | tid->baw_size = WME_MAX_BA; | |
2104 | tid->baw_head = tid->baw_tail = 0; | |
2105 | tid->sched = false; | |
e8324357 | 2106 | tid->paused = false; |
a37c2c79 | 2107 | tid->state &= ~AGGR_CLEANUP; |
c5170163 | 2108 | INIT_LIST_HEAD(&tid->buf_q); |
c5170163 | 2109 | acno = TID_TO_WME_AC(tidno); |
8ee5afbc | 2110 | tid->ac = &an->ac[acno]; |
a37c2c79 S |
2111 | tid->state &= ~AGGR_ADDBA_COMPLETE; |
2112 | tid->state &= ~AGGR_ADDBA_PROGRESS; | |
2113 | tid->addba_exchangeattempts = 0; | |
c5170163 | 2114 | } |
f078f209 | 2115 | |
8ee5afbc | 2116 | for (acno = 0, ac = &an->ac[acno]; |
c5170163 S |
2117 | acno < WME_NUM_AC; acno++, ac++) { |
2118 | ac->sched = false; | |
2119 | INIT_LIST_HEAD(&ac->tid_q); | |
2120 | ||
2121 | switch (acno) { | |
2122 | case WME_AC_BE: | |
2123 | ac->qnum = ath_tx_get_qnum(sc, | |
2124 | ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_BE); | |
2125 | break; | |
2126 | case WME_AC_BK: | |
2127 | ac->qnum = ath_tx_get_qnum(sc, | |
2128 | ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_BK); | |
2129 | break; | |
2130 | case WME_AC_VI: | |
2131 | ac->qnum = ath_tx_get_qnum(sc, | |
2132 | ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_VI); | |
2133 | break; | |
2134 | case WME_AC_VO: | |
2135 | ac->qnum = ath_tx_get_qnum(sc, | |
2136 | ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_VO); | |
2137 | break; | |
f078f209 LR |
2138 | } |
2139 | } | |
2140 | } | |
2141 | ||
b5aa9bf9 | 2142 | void ath_tx_node_cleanup(struct ath_softc *sc, struct ath_node *an) |
f078f209 LR |
2143 | { |
2144 | int i; | |
2145 | struct ath_atx_ac *ac, *ac_tmp; | |
2146 | struct ath_atx_tid *tid, *tid_tmp; | |
2147 | struct ath_txq *txq; | |
e8324357 | 2148 | |
f078f209 LR |
2149 | for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { |
2150 | if (ATH_TXQ_SETUP(sc, i)) { | |
b77f483f | 2151 | txq = &sc->tx.txq[i]; |
f078f209 | 2152 | |
b5aa9bf9 | 2153 | spin_lock(&txq->axq_lock); |
f078f209 LR |
2154 | |
2155 | list_for_each_entry_safe(ac, | |
2156 | ac_tmp, &txq->axq_acq, list) { | |
2157 | tid = list_first_entry(&ac->tid_q, | |
2158 | struct ath_atx_tid, list); | |
2159 | if (tid && tid->an != an) | |
2160 | continue; | |
2161 | list_del(&ac->list); | |
2162 | ac->sched = false; | |
2163 | ||
2164 | list_for_each_entry_safe(tid, | |
2165 | tid_tmp, &ac->tid_q, list) { | |
2166 | list_del(&tid->list); | |
2167 | tid->sched = false; | |
b5aa9bf9 | 2168 | ath_tid_drain(sc, txq, tid); |
a37c2c79 | 2169 | tid->state &= ~AGGR_ADDBA_COMPLETE; |
f078f209 | 2170 | tid->addba_exchangeattempts = 0; |
a37c2c79 | 2171 | tid->state &= ~AGGR_CLEANUP; |
f078f209 LR |
2172 | } |
2173 | } | |
2174 | ||
b5aa9bf9 | 2175 | spin_unlock(&txq->axq_lock); |
f078f209 LR |
2176 | } |
2177 | } | |
2178 | } |