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17#include "htc.h"
18
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20
21
22
23static const int subtype_txq_to_hwq[] = {
24 [WME_AC_BE] = ATH_TXQ_AC_BE,
25 [WME_AC_BK] = ATH_TXQ_AC_BK,
26 [WME_AC_VI] = ATH_TXQ_AC_VI,
27 [WME_AC_VO] = ATH_TXQ_AC_VO,
28};
29
30#define ATH9K_HTC_INIT_TXQ(subtype) do { \
31 qi.tqi_subtype = subtype_txq_to_hwq[subtype]; \
32 qi.tqi_aifs = ATH9K_TXQ_USEDEFAULT; \
33 qi.tqi_cwmin = ATH9K_TXQ_USEDEFAULT; \
34 qi.tqi_cwmax = ATH9K_TXQ_USEDEFAULT; \
35 qi.tqi_physCompBuf = 0; \
36 qi.tqi_qflags = TXQ_FLAG_TXEOLINT_ENABLE | \
37 TXQ_FLAG_TXDESCINT_ENABLE; \
38 } while (0)
39
40int get_hw_qnum(u16 queue, int *hwq_map)
41{
42 switch (queue) {
43 case 0:
44 return hwq_map[WME_AC_VO];
45 case 1:
46 return hwq_map[WME_AC_VI];
47 case 2:
48 return hwq_map[WME_AC_BE];
49 case 3:
50 return hwq_map[WME_AC_BK];
51 default:
52 return hwq_map[WME_AC_BE];
53 }
54}
55
56int ath_htc_txq_update(struct ath9k_htc_priv *priv, int qnum,
57 struct ath9k_tx_queue_info *qinfo)
58{
59 struct ath_hw *ah = priv->ah;
60 int error = 0;
61 struct ath9k_tx_queue_info qi;
62
63 ath9k_hw_get_txq_props(ah, qnum, &qi);
64
65 qi.tqi_aifs = qinfo->tqi_aifs;
66 qi.tqi_cwmin = qinfo->tqi_cwmin / 2;
67 qi.tqi_cwmax = qinfo->tqi_cwmax;
68 qi.tqi_burstTime = qinfo->tqi_burstTime;
69 qi.tqi_readyTime = qinfo->tqi_readyTime;
70
71 if (!ath9k_hw_set_txq_props(ah, qnum, &qi)) {
72 ath_err(ath9k_hw_common(ah),
73 "Unable to update hardware queue %u!\n", qnum);
74 error = -EIO;
75 } else {
76 ath9k_hw_resettxqueue(ah, qnum);
77 }
78
79 return error;
80}
81
82int ath9k_htc_tx_start(struct ath9k_htc_priv *priv, struct sk_buff *skb)
83{
84 struct ieee80211_hdr *hdr;
85 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
86 struct ieee80211_sta *sta = tx_info->control.sta;
87 struct ath9k_htc_sta *ista;
88 struct ath9k_htc_tx_ctl tx_ctl;
89 enum htc_endpoint_id epid;
90 u16 qnum;
91 __le16 fc;
92 u8 *tx_fhdr;
93 u8 sta_idx, vif_idx;
94
95 hdr = (struct ieee80211_hdr *) skb->data;
96 fc = hdr->frame_control;
97
98 if (tx_info->control.vif &&
99 (struct ath9k_htc_vif *) tx_info->control.vif->drv_priv)
100 vif_idx = ((struct ath9k_htc_vif *)
101 tx_info->control.vif->drv_priv)->index;
102 else
103 vif_idx = priv->nvifs;
104
105 if (sta) {
106 ista = (struct ath9k_htc_sta *) sta->drv_priv;
107 sta_idx = ista->index;
108 } else {
109 sta_idx = 0;
110 }
111
112 memset(&tx_ctl, 0, sizeof(struct ath9k_htc_tx_ctl));
113
114 if (ieee80211_is_data(fc)) {
115 struct tx_frame_hdr tx_hdr;
116 u32 flags = 0;
117 u8 *qc;
118
119 memset(&tx_hdr, 0, sizeof(struct tx_frame_hdr));
120
121 tx_hdr.node_idx = sta_idx;
122 tx_hdr.vif_idx = vif_idx;
123
124 if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) {
125 tx_ctl.type = ATH9K_HTC_AMPDU;
126 tx_hdr.data_type = ATH9K_HTC_AMPDU;
127 } else {
128 tx_ctl.type = ATH9K_HTC_NORMAL;
129 tx_hdr.data_type = ATH9K_HTC_NORMAL;
130 }
131
132 if (ieee80211_is_data_qos(fc)) {
133 qc = ieee80211_get_qos_ctl(hdr);
134 tx_hdr.tidno = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
135 }
136
137
138 if (priv->hw->wiphy->rts_threshold != (u32) -1)
139 if (skb->len > priv->hw->wiphy->rts_threshold)
140 flags |= ATH9K_HTC_TX_RTSCTS;
141
142
143 if (!(flags & ATH9K_HTC_TX_RTSCTS) &&
144 (priv->op_flags & OP_PROTECT_ENABLE))
145 flags |= ATH9K_HTC_TX_CTSONLY;
146
147 tx_hdr.flags = cpu_to_be32(flags);
148 tx_hdr.key_type = ath9k_cmn_get_hw_crypto_keytype(skb);
149 if (tx_hdr.key_type == ATH9K_KEY_TYPE_CLEAR)
150 tx_hdr.keyix = (u8) ATH9K_TXKEYIX_INVALID;
151 else
152 tx_hdr.keyix = tx_info->control.hw_key->hw_key_idx;
153
154 tx_fhdr = skb_push(skb, sizeof(tx_hdr));
155 memcpy(tx_fhdr, (u8 *) &tx_hdr, sizeof(tx_hdr));
156
157 qnum = skb_get_queue_mapping(skb);
158
159 switch (qnum) {
160 case 0:
161 TX_QSTAT_INC(WME_AC_VO);
162 epid = priv->data_vo_ep;
163 break;
164 case 1:
165 TX_QSTAT_INC(WME_AC_VI);
166 epid = priv->data_vi_ep;
167 break;
168 case 2:
169 TX_QSTAT_INC(WME_AC_BE);
170 epid = priv->data_be_ep;
171 break;
172 case 3:
173 default:
174 TX_QSTAT_INC(WME_AC_BK);
175 epid = priv->data_bk_ep;
176 break;
177 }
178 } else {
179 struct tx_mgmt_hdr mgmt_hdr;
180
181 memset(&mgmt_hdr, 0, sizeof(struct tx_mgmt_hdr));
182
183 tx_ctl.type = ATH9K_HTC_NORMAL;
184
185 mgmt_hdr.node_idx = sta_idx;
186 mgmt_hdr.vif_idx = vif_idx;
187 mgmt_hdr.tidno = 0;
188 mgmt_hdr.flags = 0;
189
190 mgmt_hdr.key_type = ath9k_cmn_get_hw_crypto_keytype(skb);
191 if (mgmt_hdr.key_type == ATH9K_KEY_TYPE_CLEAR)
192 mgmt_hdr.keyix = (u8) ATH9K_TXKEYIX_INVALID;
193 else
194 mgmt_hdr.keyix = tx_info->control.hw_key->hw_key_idx;
195
196 tx_fhdr = skb_push(skb, sizeof(mgmt_hdr));
197 memcpy(tx_fhdr, (u8 *) &mgmt_hdr, sizeof(mgmt_hdr));
198 epid = priv->mgmt_ep;
199 }
200
201 return htc_send(priv->htc, skb, epid, &tx_ctl);
202}
203
204static bool ath9k_htc_check_tx_aggr(struct ath9k_htc_priv *priv,
205 struct ath9k_htc_sta *ista, u8 tid)
206{
207 bool ret = false;
208
209 spin_lock_bh(&priv->tx_lock);
210 if ((tid < ATH9K_HTC_MAX_TID) && (ista->tid_state[tid] == AGGR_STOP))
211 ret = true;
212 spin_unlock_bh(&priv->tx_lock);
213
214 return ret;
215}
216
217void ath9k_tx_tasklet(unsigned long data)
218{
219 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data;
220 struct ieee80211_sta *sta;
221 struct ieee80211_hdr *hdr;
222 struct ieee80211_tx_info *tx_info;
223 struct sk_buff *skb = NULL;
224 __le16 fc;
225
226 while ((skb = skb_dequeue(&priv->tx_queue)) != NULL) {
227
228 hdr = (struct ieee80211_hdr *) skb->data;
229 fc = hdr->frame_control;
230 tx_info = IEEE80211_SKB_CB(skb);
231
232 memset(&tx_info->status, 0, sizeof(tx_info->status));
233
234 rcu_read_lock();
235
236 sta = ieee80211_find_sta(priv->vif, hdr->addr1);
237 if (!sta) {
238 rcu_read_unlock();
239 ieee80211_tx_status(priv->hw, skb);
240 continue;
241 }
242
243
244
245 if (sta && conf_is_ht(&priv->hw->conf) &&
246 !(skb->protocol == cpu_to_be16(ETH_P_PAE))) {
247 if (ieee80211_is_data_qos(fc)) {
248 u8 *qc, tid;
249 struct ath9k_htc_sta *ista;
250
251 qc = ieee80211_get_qos_ctl(hdr);
252 tid = qc[0] & 0xf;
253 ista = (struct ath9k_htc_sta *)sta->drv_priv;
254
255 if (ath9k_htc_check_tx_aggr(priv, ista, tid)) {
256 ieee80211_start_tx_ba_session(sta, tid, 0);
257 spin_lock_bh(&priv->tx_lock);
258 ista->tid_state[tid] = AGGR_PROGRESS;
259 spin_unlock_bh(&priv->tx_lock);
260 }
261 }
262 }
263
264 rcu_read_unlock();
265
266
267 ieee80211_tx_status(priv->hw, skb);
268 }
269
270
271 spin_lock_bh(&priv->tx_lock);
272 if (priv->tx_queues_stop) {
273 priv->tx_queues_stop = false;
274 spin_unlock_bh(&priv->tx_lock);
275 ath_dbg(ath9k_hw_common(priv->ah), ATH_DBG_XMIT,
276 "Waking up TX queues\n");
277 ieee80211_wake_queues(priv->hw);
278 return;
279 }
280 spin_unlock_bh(&priv->tx_lock);
281}
282
283void ath9k_htc_txep(void *drv_priv, struct sk_buff *skb,
284 enum htc_endpoint_id ep_id, bool txok)
285{
286 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *) drv_priv;
287 struct ath_common *common = ath9k_hw_common(priv->ah);
288 struct ieee80211_tx_info *tx_info;
289
290 if (!skb)
291 return;
292
293 if (ep_id == priv->mgmt_ep) {
294 skb_pull(skb, sizeof(struct tx_mgmt_hdr));
295 } else if ((ep_id == priv->data_bk_ep) ||
296 (ep_id == priv->data_be_ep) ||
297 (ep_id == priv->data_vi_ep) ||
298 (ep_id == priv->data_vo_ep)) {
299 skb_pull(skb, sizeof(struct tx_frame_hdr));
300 } else {
301 ath_err(common, "Unsupported TX EPID: %d\n", ep_id);
302 dev_kfree_skb_any(skb);
303 return;
304 }
305
306 tx_info = IEEE80211_SKB_CB(skb);
307
308 if (txok)
309 tx_info->flags |= IEEE80211_TX_STAT_ACK;
310
311 skb_queue_tail(&priv->tx_queue, skb);
312 tasklet_schedule(&priv->tx_tasklet);
313}
314
315int ath9k_tx_init(struct ath9k_htc_priv *priv)
316{
317 skb_queue_head_init(&priv->tx_queue);
318 return 0;
319}
320
321void ath9k_tx_cleanup(struct ath9k_htc_priv *priv)
322{
323
324}
325
326bool ath9k_htc_txq_setup(struct ath9k_htc_priv *priv, int subtype)
327{
328 struct ath_hw *ah = priv->ah;
329 struct ath_common *common = ath9k_hw_common(ah);
330 struct ath9k_tx_queue_info qi;
331 int qnum;
332
333 memset(&qi, 0, sizeof(qi));
334 ATH9K_HTC_INIT_TXQ(subtype);
335
336 qnum = ath9k_hw_setuptxqueue(priv->ah, ATH9K_TX_QUEUE_DATA, &qi);
337 if (qnum == -1)
338 return false;
339
340 if (qnum >= ARRAY_SIZE(priv->hwq_map)) {
341 ath_err(common, "qnum %u out of range, max %zu!\n",
342 qnum, ARRAY_SIZE(priv->hwq_map));
343 ath9k_hw_releasetxqueue(ah, qnum);
344 return false;
345 }
346
347 priv->hwq_map[subtype] = qnum;
348 return true;
349}
350
351int ath9k_htc_cabq_setup(struct ath9k_htc_priv *priv)
352{
353 struct ath9k_tx_queue_info qi;
354
355 memset(&qi, 0, sizeof(qi));
356 ATH9K_HTC_INIT_TXQ(0);
357
358 return ath9k_hw_setuptxqueue(priv->ah, ATH9K_TX_QUEUE_CAB, &qi);
359}
360
361
362
363
364
365
366
367
368u32 ath9k_htc_calcrxfilter(struct ath9k_htc_priv *priv)
369{
370#define RX_FILTER_PRESERVE (ATH9K_RX_FILTER_PHYERR | ATH9K_RX_FILTER_PHYRADAR)
371
372 struct ath_hw *ah = priv->ah;
373 u32 rfilt;
374
375 rfilt = (ath9k_hw_getrxfilter(ah) & RX_FILTER_PRESERVE)
376 | ATH9K_RX_FILTER_UCAST | ATH9K_RX_FILTER_BCAST
377 | ATH9K_RX_FILTER_MCAST;
378
379 if (priv->rxfilter & FIF_PROBE_REQ)
380 rfilt |= ATH9K_RX_FILTER_PROBEREQ;
381
382
383
384
385
386
387 if (((ah->opmode != NL80211_IFTYPE_AP) &&
388 (priv->rxfilter & FIF_PROMISC_IN_BSS)) ||
389 (ah->opmode == NL80211_IFTYPE_MONITOR))
390 rfilt |= ATH9K_RX_FILTER_PROM;
391
392 if (priv->rxfilter & FIF_CONTROL)
393 rfilt |= ATH9K_RX_FILTER_CONTROL;
394
395 if ((ah->opmode == NL80211_IFTYPE_STATION) &&
396 !(priv->rxfilter & FIF_BCN_PRBRESP_PROMISC))
397 rfilt |= ATH9K_RX_FILTER_MYBEACON;
398 else
399 rfilt |= ATH9K_RX_FILTER_BEACON;
400
401 if (conf_is_ht(&priv->hw->conf))
402 rfilt |= ATH9K_RX_FILTER_COMP_BAR;
403
404 return rfilt;
405
406#undef RX_FILTER_PRESERVE
407}
408
409
410
411
412static void ath9k_htc_opmode_init(struct ath9k_htc_priv *priv)
413{
414 struct ath_hw *ah = priv->ah;
415 struct ath_common *common = ath9k_hw_common(ah);
416
417 u32 rfilt, mfilt[2];
418
419
420 rfilt = ath9k_htc_calcrxfilter(priv);
421 ath9k_hw_setrxfilter(ah, rfilt);
422
423
424 ath_hw_setbssidmask(common);
425
426
427 ath9k_hw_setopmode(ah);
428
429
430 mfilt[0] = mfilt[1] = ~0;
431 ath9k_hw_setmcastfilter(ah, mfilt[0], mfilt[1]);
432}
433
434void ath9k_host_rx_init(struct ath9k_htc_priv *priv)
435{
436 ath9k_hw_rxena(priv->ah);
437 ath9k_htc_opmode_init(priv);
438 ath9k_hw_startpcureceive(priv->ah, (priv->op_flags & OP_SCANNING));
439 priv->rx.last_rssi = ATH_RSSI_DUMMY_MARKER;
440}
441
442static void ath9k_process_rate(struct ieee80211_hw *hw,
443 struct ieee80211_rx_status *rxs,
444 u8 rx_rate, u8 rs_flags)
445{
446 struct ieee80211_supported_band *sband;
447 enum ieee80211_band band;
448 unsigned int i = 0;
449
450 if (rx_rate & 0x80) {
451
452 rxs->flag |= RX_FLAG_HT;
453 if (rs_flags & ATH9K_RX_2040)
454 rxs->flag |= RX_FLAG_40MHZ;
455 if (rs_flags & ATH9K_RX_GI)
456 rxs->flag |= RX_FLAG_SHORT_GI;
457 rxs->rate_idx = rx_rate & 0x7f;
458 return;
459 }
460
461 band = hw->conf.channel->band;
462 sband = hw->wiphy->bands[band];
463
464 for (i = 0; i < sband->n_bitrates; i++) {
465 if (sband->bitrates[i].hw_value == rx_rate) {
466 rxs->rate_idx = i;
467 return;
468 }
469 if (sband->bitrates[i].hw_value_short == rx_rate) {
470 rxs->rate_idx = i;
471 rxs->flag |= RX_FLAG_SHORTPRE;
472 return;
473 }
474 }
475
476}
477
478static bool ath9k_rx_prepare(struct ath9k_htc_priv *priv,
479 struct ath9k_htc_rxbuf *rxbuf,
480 struct ieee80211_rx_status *rx_status)
481
482{
483 struct ieee80211_hdr *hdr;
484 struct ieee80211_hw *hw = priv->hw;
485 struct sk_buff *skb = rxbuf->skb;
486 struct ath_common *common = ath9k_hw_common(priv->ah);
487 struct ath_htc_rx_status *rxstatus;
488 int hdrlen, padpos, padsize;
489 int last_rssi = ATH_RSSI_DUMMY_MARKER;
490 __le16 fc;
491
492 if (skb->len <= HTC_RX_FRAME_HEADER_SIZE) {
493 ath_err(common, "Corrupted RX frame, dropping\n");
494 goto rx_next;
495 }
496
497 rxstatus = (struct ath_htc_rx_status *)skb->data;
498
499 if (be16_to_cpu(rxstatus->rs_datalen) -
500 (skb->len - HTC_RX_FRAME_HEADER_SIZE) != 0) {
501 ath_err(common,
502 "Corrupted RX data len, dropping (dlen: %d, skblen: %d)\n",
503 rxstatus->rs_datalen, skb->len);
504 goto rx_next;
505 }
506
507
508 memcpy(&rxbuf->rxstatus, rxstatus, HTC_RX_FRAME_HEADER_SIZE);
509 skb_pull(skb, HTC_RX_FRAME_HEADER_SIZE);
510
511 hdr = (struct ieee80211_hdr *)skb->data;
512 fc = hdr->frame_control;
513 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
514
515 padpos = ath9k_cmn_padpos(fc);
516
517 padsize = padpos & 3;
518 if (padsize && skb->len >= padpos+padsize+FCS_LEN) {
519 memmove(skb->data + padsize, skb->data, padpos);
520 skb_pull(skb, padsize);
521 }
522
523 memset(rx_status, 0, sizeof(struct ieee80211_rx_status));
524
525 if (rxbuf->rxstatus.rs_status != 0) {
526 if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_CRC)
527 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
528 if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_PHY)
529 goto rx_next;
530
531 if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_DECRYPT) {
532
533 } else if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_MIC) {
534 if (ieee80211_is_ctl(fc))
535
536
537
538
539
540 rxbuf->rxstatus.rs_status &= ~ATH9K_RXERR_MIC;
541 else
542 rx_status->flag |= RX_FLAG_MMIC_ERROR;
543 }
544
545
546
547
548
549
550 if (priv->ah->opmode == NL80211_IFTYPE_MONITOR) {
551 if (rxbuf->rxstatus.rs_status &
552 ~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC |
553 ATH9K_RXERR_CRC))
554 goto rx_next;
555 } else {
556 if (rxbuf->rxstatus.rs_status &
557 ~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC)) {
558 goto rx_next;
559 }
560 }
561 }
562
563 if (!(rxbuf->rxstatus.rs_status & ATH9K_RXERR_DECRYPT)) {
564 u8 keyix;
565 keyix = rxbuf->rxstatus.rs_keyix;
566 if (keyix != ATH9K_RXKEYIX_INVALID) {
567 rx_status->flag |= RX_FLAG_DECRYPTED;
568 } else if (ieee80211_has_protected(fc) &&
569 skb->len >= hdrlen + 4) {
570 keyix = skb->data[hdrlen + 3] >> 6;
571 if (test_bit(keyix, common->keymap))
572 rx_status->flag |= RX_FLAG_DECRYPTED;
573 }
574 }
575
576 ath9k_process_rate(hw, rx_status, rxbuf->rxstatus.rs_rate,
577 rxbuf->rxstatus.rs_flags);
578
579 if (priv->op_flags & OP_ASSOCIATED) {
580 if (rxbuf->rxstatus.rs_rssi != ATH9K_RSSI_BAD &&
581 !rxbuf->rxstatus.rs_moreaggr)
582 ATH_RSSI_LPF(priv->rx.last_rssi,
583 rxbuf->rxstatus.rs_rssi);
584
585 last_rssi = priv->rx.last_rssi;
586
587 if (likely(last_rssi != ATH_RSSI_DUMMY_MARKER))
588 rxbuf->rxstatus.rs_rssi = ATH_EP_RND(last_rssi,
589 ATH_RSSI_EP_MULTIPLIER);
590
591 if (rxbuf->rxstatus.rs_rssi < 0)
592 rxbuf->rxstatus.rs_rssi = 0;
593
594 if (ieee80211_is_beacon(fc))
595 priv->ah->stats.avgbrssi = rxbuf->rxstatus.rs_rssi;
596 }
597
598 rx_status->mactime = be64_to_cpu(rxbuf->rxstatus.rs_tstamp);
599 rx_status->band = hw->conf.channel->band;
600 rx_status->freq = hw->conf.channel->center_freq;
601 rx_status->signal = rxbuf->rxstatus.rs_rssi + ATH_DEFAULT_NOISE_FLOOR;
602 rx_status->antenna = rxbuf->rxstatus.rs_antenna;
603 rx_status->flag |= RX_FLAG_TSFT;
604
605 return true;
606
607rx_next:
608 return false;
609}
610
611
612
613
614void ath9k_rx_tasklet(unsigned long data)
615{
616 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data;
617 struct ath9k_htc_rxbuf *rxbuf = NULL, *tmp_buf = NULL;
618 struct ieee80211_rx_status rx_status;
619 struct sk_buff *skb;
620 unsigned long flags;
621 struct ieee80211_hdr *hdr;
622
623 do {
624 spin_lock_irqsave(&priv->rx.rxbuflock, flags);
625 list_for_each_entry(tmp_buf, &priv->rx.rxbuf, list) {
626 if (tmp_buf->in_process) {
627 rxbuf = tmp_buf;
628 break;
629 }
630 }
631
632 if (rxbuf == NULL) {
633 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags);
634 break;
635 }
636
637 if (!rxbuf->skb)
638 goto requeue;
639
640 if (!ath9k_rx_prepare(priv, rxbuf, &rx_status)) {
641 dev_kfree_skb_any(rxbuf->skb);
642 goto requeue;
643 }
644
645 memcpy(IEEE80211_SKB_RXCB(rxbuf->skb), &rx_status,
646 sizeof(struct ieee80211_rx_status));
647 skb = rxbuf->skb;
648 hdr = (struct ieee80211_hdr *) skb->data;
649
650 if (ieee80211_is_beacon(hdr->frame_control) && priv->ps_enabled)
651 ieee80211_queue_work(priv->hw, &priv->ps_work);
652
653 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags);
654
655 ieee80211_rx(priv->hw, skb);
656
657 spin_lock_irqsave(&priv->rx.rxbuflock, flags);
658requeue:
659 rxbuf->in_process = false;
660 rxbuf->skb = NULL;
661 list_move_tail(&rxbuf->list, &priv->rx.rxbuf);
662 rxbuf = NULL;
663 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags);
664 } while (1);
665
666}
667
668void ath9k_htc_rxep(void *drv_priv, struct sk_buff *skb,
669 enum htc_endpoint_id ep_id)
670{
671 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)drv_priv;
672 struct ath_hw *ah = priv->ah;
673 struct ath_common *common = ath9k_hw_common(ah);
674 struct ath9k_htc_rxbuf *rxbuf = NULL, *tmp_buf = NULL;
675
676 spin_lock(&priv->rx.rxbuflock);
677 list_for_each_entry(tmp_buf, &priv->rx.rxbuf, list) {
678 if (!tmp_buf->in_process) {
679 rxbuf = tmp_buf;
680 break;
681 }
682 }
683 spin_unlock(&priv->rx.rxbuflock);
684
685 if (rxbuf == NULL) {
686 ath_dbg(common, ATH_DBG_ANY,
687 "No free RX buffer\n");
688 goto err;
689 }
690
691 spin_lock(&priv->rx.rxbuflock);
692 rxbuf->skb = skb;
693 rxbuf->in_process = true;
694 spin_unlock(&priv->rx.rxbuflock);
695
696 tasklet_schedule(&priv->rx_tasklet);
697 return;
698err:
699 dev_kfree_skb_any(skb);
700}
701
702
703
704void ath9k_rx_cleanup(struct ath9k_htc_priv *priv)
705{
706 struct ath9k_htc_rxbuf *rxbuf, *tbuf;
707
708 list_for_each_entry_safe(rxbuf, tbuf, &priv->rx.rxbuf, list) {
709 list_del(&rxbuf->list);
710 if (rxbuf->skb)
711 dev_kfree_skb_any(rxbuf->skb);
712 kfree(rxbuf);
713 }
714}
715
716int ath9k_rx_init(struct ath9k_htc_priv *priv)
717{
718 struct ath_hw *ah = priv->ah;
719 struct ath_common *common = ath9k_hw_common(ah);
720 struct ath9k_htc_rxbuf *rxbuf;
721 int i = 0;
722
723 INIT_LIST_HEAD(&priv->rx.rxbuf);
724 spin_lock_init(&priv->rx.rxbuflock);
725
726 for (i = 0; i < ATH9K_HTC_RXBUF; i++) {
727 rxbuf = kzalloc(sizeof(struct ath9k_htc_rxbuf), GFP_KERNEL);
728 if (rxbuf == NULL) {
729 ath_err(common, "Unable to allocate RX buffers\n");
730 goto err;
731 }
732 list_add_tail(&rxbuf->list, &priv->rx.rxbuf);
733 }
734
735 return 0;
736
737err:
738 ath9k_rx_cleanup(priv);
739 return -ENOMEM;
740}
741
