2 * Copyright (c) 2010 Atheros Communications Inc.
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.
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.
23 static 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,
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; \
40 int get_hw_qnum(u16 queue, int *hwq_map)
44 return hwq_map[WME_AC_VO];
46 return hwq_map[WME_AC_VI];
48 return hwq_map[WME_AC_BE];
50 return hwq_map[WME_AC_BK];
52 return hwq_map[WME_AC_BE];
56 int ath_htc_txq_update(struct ath9k_htc_priv *priv, int qnum,
57 struct ath9k_tx_queue_info *qinfo)
59 struct ath_hw *ah = priv->ah;
61 struct ath9k_tx_queue_info qi;
63 ath9k_hw_get_txq_props(ah, qnum, &qi);
65 qi.tqi_aifs = qinfo->tqi_aifs;
66 qi.tqi_cwmin = qinfo->tqi_cwmin / 2; /* XXX */
67 qi.tqi_cwmax = qinfo->tqi_cwmax;
68 qi.tqi_burstTime = qinfo->tqi_burstTime;
69 qi.tqi_readyTime = qinfo->tqi_readyTime;
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);
76 ath9k_hw_resettxqueue(ah, qnum);
82 int ath9k_htc_tx_start(struct ath9k_htc_priv *priv, struct sk_buff *skb)
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;
95 hdr = (struct ieee80211_hdr *) skb->data;
96 fc = hdr->frame_control;
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;
103 vif_idx = priv->nvifs;
106 ista = (struct ath9k_htc_sta *) sta->drv_priv;
107 sta_idx = ista->index;
112 memset(&tx_ctl, 0, sizeof(struct ath9k_htc_tx_ctl));
114 if (ieee80211_is_data(fc)) {
115 struct tx_frame_hdr tx_hdr;
118 memset(&tx_hdr, 0, sizeof(struct tx_frame_hdr));
120 tx_hdr.node_idx = sta_idx;
121 tx_hdr.vif_idx = vif_idx;
123 if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) {
124 tx_ctl.type = ATH9K_HTC_AMPDU;
125 tx_hdr.data_type = ATH9K_HTC_AMPDU;
127 tx_ctl.type = ATH9K_HTC_NORMAL;
128 tx_hdr.data_type = ATH9K_HTC_NORMAL;
131 if (ieee80211_is_data_qos(fc)) {
132 qc = ieee80211_get_qos_ctl(hdr);
133 tx_hdr.tidno = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
136 /* Check for RTS protection */
137 if (priv->hw->wiphy->rts_threshold != (u32) -1)
138 if (skb->len > priv->hw->wiphy->rts_threshold)
139 tx_hdr.flags |= ATH9K_HTC_TX_RTSCTS;
142 if (!(tx_hdr.flags & ATH9K_HTC_TX_RTSCTS) &&
143 (priv->op_flags & OP_PROTECT_ENABLE))
144 tx_hdr.flags |= ATH9K_HTC_TX_CTSONLY;
146 tx_hdr.key_type = ath9k_cmn_get_hw_crypto_keytype(skb);
147 if (tx_hdr.key_type == ATH9K_KEY_TYPE_CLEAR)
148 tx_hdr.keyix = (u8) ATH9K_TXKEYIX_INVALID;
150 tx_hdr.keyix = tx_info->control.hw_key->hw_key_idx;
152 tx_fhdr = skb_push(skb, sizeof(tx_hdr));
153 memcpy(tx_fhdr, (u8 *) &tx_hdr, sizeof(tx_hdr));
155 qnum = skb_get_queue_mapping(skb);
159 TX_QSTAT_INC(WME_AC_VO);
160 epid = priv->data_vo_ep;
163 TX_QSTAT_INC(WME_AC_VI);
164 epid = priv->data_vi_ep;
167 TX_QSTAT_INC(WME_AC_BE);
168 epid = priv->data_be_ep;
172 TX_QSTAT_INC(WME_AC_BK);
173 epid = priv->data_bk_ep;
177 struct tx_mgmt_hdr mgmt_hdr;
179 memset(&mgmt_hdr, 0, sizeof(struct tx_mgmt_hdr));
181 tx_ctl.type = ATH9K_HTC_NORMAL;
183 mgmt_hdr.node_idx = sta_idx;
184 mgmt_hdr.vif_idx = vif_idx;
188 mgmt_hdr.key_type = ath9k_cmn_get_hw_crypto_keytype(skb);
189 if (mgmt_hdr.key_type == ATH9K_KEY_TYPE_CLEAR)
190 mgmt_hdr.keyix = (u8) ATH9K_TXKEYIX_INVALID;
192 mgmt_hdr.keyix = tx_info->control.hw_key->hw_key_idx;
194 tx_fhdr = skb_push(skb, sizeof(mgmt_hdr));
195 memcpy(tx_fhdr, (u8 *) &mgmt_hdr, sizeof(mgmt_hdr));
196 epid = priv->mgmt_ep;
199 return htc_send(priv->htc, skb, epid, &tx_ctl);
202 static bool ath9k_htc_check_tx_aggr(struct ath9k_htc_priv *priv,
203 struct ath9k_htc_sta *ista, u8 tid)
207 spin_lock_bh(&priv->tx_lock);
208 if ((tid < ATH9K_HTC_MAX_TID) && (ista->tid_state[tid] == AGGR_STOP))
210 spin_unlock_bh(&priv->tx_lock);
215 void ath9k_tx_tasklet(unsigned long data)
217 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data;
218 struct ieee80211_sta *sta;
219 struct ieee80211_hdr *hdr;
220 struct ieee80211_tx_info *tx_info;
221 struct sk_buff *skb = NULL;
224 while ((skb = skb_dequeue(&priv->tx_queue)) != NULL) {
226 hdr = (struct ieee80211_hdr *) skb->data;
227 fc = hdr->frame_control;
228 tx_info = IEEE80211_SKB_CB(skb);
230 memset(&tx_info->status, 0, sizeof(tx_info->status));
234 sta = ieee80211_find_sta(priv->vif, hdr->addr1);
237 ieee80211_tx_status(priv->hw, skb);
241 /* Check if we need to start aggregation */
243 if (sta && conf_is_ht(&priv->hw->conf) &&
244 !(skb->protocol == cpu_to_be16(ETH_P_PAE))) {
245 if (ieee80211_is_data_qos(fc)) {
247 struct ath9k_htc_sta *ista;
249 qc = ieee80211_get_qos_ctl(hdr);
251 ista = (struct ath9k_htc_sta *)sta->drv_priv;
253 if (ath9k_htc_check_tx_aggr(priv, ista, tid)) {
254 ieee80211_start_tx_ba_session(sta, tid, 0);
255 spin_lock_bh(&priv->tx_lock);
256 ista->tid_state[tid] = AGGR_PROGRESS;
257 spin_unlock_bh(&priv->tx_lock);
264 /* Send status to mac80211 */
265 ieee80211_tx_status(priv->hw, skb);
268 /* Wake TX queues if needed */
269 spin_lock_bh(&priv->tx_lock);
270 if (priv->tx_queues_stop) {
271 priv->tx_queues_stop = false;
272 spin_unlock_bh(&priv->tx_lock);
273 ath_dbg(ath9k_hw_common(priv->ah), ATH_DBG_XMIT,
274 "Waking up TX queues\n");
275 ieee80211_wake_queues(priv->hw);
278 spin_unlock_bh(&priv->tx_lock);
281 void ath9k_htc_txep(void *drv_priv, struct sk_buff *skb,
282 enum htc_endpoint_id ep_id, bool txok)
284 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *) drv_priv;
285 struct ath_common *common = ath9k_hw_common(priv->ah);
286 struct ieee80211_tx_info *tx_info;
291 if (ep_id == priv->mgmt_ep) {
292 skb_pull(skb, sizeof(struct tx_mgmt_hdr));
293 } else if ((ep_id == priv->data_bk_ep) ||
294 (ep_id == priv->data_be_ep) ||
295 (ep_id == priv->data_vi_ep) ||
296 (ep_id == priv->data_vo_ep)) {
297 skb_pull(skb, sizeof(struct tx_frame_hdr));
299 ath_err(common, "Unsupported TX EPID: %d\n", ep_id);
300 dev_kfree_skb_any(skb);
304 tx_info = IEEE80211_SKB_CB(skb);
307 tx_info->flags |= IEEE80211_TX_STAT_ACK;
309 skb_queue_tail(&priv->tx_queue, skb);
310 tasklet_schedule(&priv->tx_tasklet);
313 int ath9k_tx_init(struct ath9k_htc_priv *priv)
315 skb_queue_head_init(&priv->tx_queue);
319 void ath9k_tx_cleanup(struct ath9k_htc_priv *priv)
324 bool ath9k_htc_txq_setup(struct ath9k_htc_priv *priv, int subtype)
326 struct ath_hw *ah = priv->ah;
327 struct ath_common *common = ath9k_hw_common(ah);
328 struct ath9k_tx_queue_info qi;
331 memset(&qi, 0, sizeof(qi));
332 ATH9K_HTC_INIT_TXQ(subtype);
334 qnum = ath9k_hw_setuptxqueue(priv->ah, ATH9K_TX_QUEUE_DATA, &qi);
338 if (qnum >= ARRAY_SIZE(priv->hwq_map)) {
339 ath_err(common, "qnum %u out of range, max %zu!\n",
340 qnum, ARRAY_SIZE(priv->hwq_map));
341 ath9k_hw_releasetxqueue(ah, qnum);
345 priv->hwq_map[subtype] = qnum;
349 int ath9k_htc_cabq_setup(struct ath9k_htc_priv *priv)
351 struct ath9k_tx_queue_info qi;
353 memset(&qi, 0, sizeof(qi));
354 ATH9K_HTC_INIT_TXQ(0);
356 return ath9k_hw_setuptxqueue(priv->ah, ATH9K_TX_QUEUE_CAB, &qi);
364 * Calculate the RX filter to be set in the HW.
366 u32 ath9k_htc_calcrxfilter(struct ath9k_htc_priv *priv)
368 #define RX_FILTER_PRESERVE (ATH9K_RX_FILTER_PHYERR | ATH9K_RX_FILTER_PHYRADAR)
370 struct ath_hw *ah = priv->ah;
373 rfilt = (ath9k_hw_getrxfilter(ah) & RX_FILTER_PRESERVE)
374 | ATH9K_RX_FILTER_UCAST | ATH9K_RX_FILTER_BCAST
375 | ATH9K_RX_FILTER_MCAST;
377 if (priv->rxfilter & FIF_PROBE_REQ)
378 rfilt |= ATH9K_RX_FILTER_PROBEREQ;
381 * Set promiscuous mode when FIF_PROMISC_IN_BSS is enabled for station
382 * mode interface or when in monitor mode. AP mode does not need this
383 * since it receives all in-BSS frames anyway.
385 if (((ah->opmode != NL80211_IFTYPE_AP) &&
386 (priv->rxfilter & FIF_PROMISC_IN_BSS)) ||
387 (ah->opmode == NL80211_IFTYPE_MONITOR))
388 rfilt |= ATH9K_RX_FILTER_PROM;
390 if (priv->rxfilter & FIF_CONTROL)
391 rfilt |= ATH9K_RX_FILTER_CONTROL;
393 if ((ah->opmode == NL80211_IFTYPE_STATION) &&
394 !(priv->rxfilter & FIF_BCN_PRBRESP_PROMISC))
395 rfilt |= ATH9K_RX_FILTER_MYBEACON;
397 rfilt |= ATH9K_RX_FILTER_BEACON;
399 if (conf_is_ht(&priv->hw->conf))
400 rfilt |= ATH9K_RX_FILTER_COMP_BAR;
404 #undef RX_FILTER_PRESERVE
408 * Recv initialization for opmode change.
410 static void ath9k_htc_opmode_init(struct ath9k_htc_priv *priv)
412 struct ath_hw *ah = priv->ah;
413 struct ath_common *common = ath9k_hw_common(ah);
417 /* configure rx filter */
418 rfilt = ath9k_htc_calcrxfilter(priv);
419 ath9k_hw_setrxfilter(ah, rfilt);
421 /* configure bssid mask */
422 ath_hw_setbssidmask(common);
424 /* configure operational mode */
425 ath9k_hw_setopmode(ah);
427 /* calculate and install multicast filter */
428 mfilt[0] = mfilt[1] = ~0;
429 ath9k_hw_setmcastfilter(ah, mfilt[0], mfilt[1]);
432 void ath9k_host_rx_init(struct ath9k_htc_priv *priv)
434 ath9k_hw_rxena(priv->ah);
435 ath9k_htc_opmode_init(priv);
436 ath9k_hw_startpcureceive(priv->ah, (priv->op_flags & OP_SCANNING));
437 priv->rx.last_rssi = ATH_RSSI_DUMMY_MARKER;
440 static void ath9k_process_rate(struct ieee80211_hw *hw,
441 struct ieee80211_rx_status *rxs,
442 u8 rx_rate, u8 rs_flags)
444 struct ieee80211_supported_band *sband;
445 enum ieee80211_band band;
448 if (rx_rate & 0x80) {
450 rxs->flag |= RX_FLAG_HT;
451 if (rs_flags & ATH9K_RX_2040)
452 rxs->flag |= RX_FLAG_40MHZ;
453 if (rs_flags & ATH9K_RX_GI)
454 rxs->flag |= RX_FLAG_SHORT_GI;
455 rxs->rate_idx = rx_rate & 0x7f;
459 band = hw->conf.channel->band;
460 sband = hw->wiphy->bands[band];
462 for (i = 0; i < sband->n_bitrates; i++) {
463 if (sband->bitrates[i].hw_value == rx_rate) {
467 if (sband->bitrates[i].hw_value_short == rx_rate) {
469 rxs->flag |= RX_FLAG_SHORTPRE;
476 static bool ath9k_rx_prepare(struct ath9k_htc_priv *priv,
477 struct ath9k_htc_rxbuf *rxbuf,
478 struct ieee80211_rx_status *rx_status)
481 struct ieee80211_hdr *hdr;
482 struct ieee80211_hw *hw = priv->hw;
483 struct sk_buff *skb = rxbuf->skb;
484 struct ath_common *common = ath9k_hw_common(priv->ah);
485 struct ath_htc_rx_status *rxstatus;
486 int hdrlen, padpos, padsize;
487 int last_rssi = ATH_RSSI_DUMMY_MARKER;
490 if (skb->len <= HTC_RX_FRAME_HEADER_SIZE) {
491 ath_err(common, "Corrupted RX frame, dropping\n");
495 rxstatus = (struct ath_htc_rx_status *)skb->data;
497 if (be16_to_cpu(rxstatus->rs_datalen) -
498 (skb->len - HTC_RX_FRAME_HEADER_SIZE) != 0) {
500 "Corrupted RX data len, dropping (dlen: %d, skblen: %d)\n",
501 rxstatus->rs_datalen, skb->len);
505 /* Get the RX status information */
506 memcpy(&rxbuf->rxstatus, rxstatus, HTC_RX_FRAME_HEADER_SIZE);
507 skb_pull(skb, HTC_RX_FRAME_HEADER_SIZE);
509 hdr = (struct ieee80211_hdr *)skb->data;
510 fc = hdr->frame_control;
511 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
513 padpos = ath9k_cmn_padpos(fc);
515 padsize = padpos & 3;
516 if (padsize && skb->len >= padpos+padsize+FCS_LEN) {
517 memmove(skb->data + padsize, skb->data, padpos);
518 skb_pull(skb, padsize);
521 memset(rx_status, 0, sizeof(struct ieee80211_rx_status));
523 if (rxbuf->rxstatus.rs_status != 0) {
524 if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_CRC)
525 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
526 if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_PHY)
529 if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_DECRYPT) {
531 } else if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_MIC) {
532 if (ieee80211_is_ctl(fc))
534 * Sometimes, we get invalid
535 * MIC failures on valid control frames.
536 * Remove these mic errors.
538 rxbuf->rxstatus.rs_status &= ~ATH9K_RXERR_MIC;
540 rx_status->flag |= RX_FLAG_MMIC_ERROR;
544 * Reject error frames with the exception of
545 * decryption and MIC failures. For monitor mode,
546 * we also ignore the CRC error.
548 if (priv->ah->opmode == NL80211_IFTYPE_MONITOR) {
549 if (rxbuf->rxstatus.rs_status &
550 ~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC |
554 if (rxbuf->rxstatus.rs_status &
555 ~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC)) {
561 if (!(rxbuf->rxstatus.rs_status & ATH9K_RXERR_DECRYPT)) {
563 keyix = rxbuf->rxstatus.rs_keyix;
564 if (keyix != ATH9K_RXKEYIX_INVALID) {
565 rx_status->flag |= RX_FLAG_DECRYPTED;
566 } else if (ieee80211_has_protected(fc) &&
567 skb->len >= hdrlen + 4) {
568 keyix = skb->data[hdrlen + 3] >> 6;
569 if (test_bit(keyix, common->keymap))
570 rx_status->flag |= RX_FLAG_DECRYPTED;
574 ath9k_process_rate(hw, rx_status, rxbuf->rxstatus.rs_rate,
575 rxbuf->rxstatus.rs_flags);
577 if (priv->op_flags & OP_ASSOCIATED) {
578 if (rxbuf->rxstatus.rs_rssi != ATH9K_RSSI_BAD &&
579 !rxbuf->rxstatus.rs_moreaggr)
580 ATH_RSSI_LPF(priv->rx.last_rssi,
581 rxbuf->rxstatus.rs_rssi);
583 last_rssi = priv->rx.last_rssi;
585 if (likely(last_rssi != ATH_RSSI_DUMMY_MARKER))
586 rxbuf->rxstatus.rs_rssi = ATH_EP_RND(last_rssi,
587 ATH_RSSI_EP_MULTIPLIER);
589 if (rxbuf->rxstatus.rs_rssi < 0)
590 rxbuf->rxstatus.rs_rssi = 0;
592 if (ieee80211_is_beacon(fc))
593 priv->ah->stats.avgbrssi = rxbuf->rxstatus.rs_rssi;
596 rx_status->mactime = be64_to_cpu(rxbuf->rxstatus.rs_tstamp);
597 rx_status->band = hw->conf.channel->band;
598 rx_status->freq = hw->conf.channel->center_freq;
599 rx_status->signal = rxbuf->rxstatus.rs_rssi + ATH_DEFAULT_NOISE_FLOOR;
600 rx_status->antenna = rxbuf->rxstatus.rs_antenna;
601 rx_status->flag |= RX_FLAG_TSFT;
610 * FIXME: Handle FLUSH later on.
612 void ath9k_rx_tasklet(unsigned long data)
614 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data;
615 struct ath9k_htc_rxbuf *rxbuf = NULL, *tmp_buf = NULL;
616 struct ieee80211_rx_status rx_status;
619 struct ieee80211_hdr *hdr;
622 spin_lock_irqsave(&priv->rx.rxbuflock, flags);
623 list_for_each_entry(tmp_buf, &priv->rx.rxbuf, list) {
624 if (tmp_buf->in_process) {
631 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags);
638 if (!ath9k_rx_prepare(priv, rxbuf, &rx_status)) {
639 dev_kfree_skb_any(rxbuf->skb);
643 memcpy(IEEE80211_SKB_RXCB(rxbuf->skb), &rx_status,
644 sizeof(struct ieee80211_rx_status));
646 hdr = (struct ieee80211_hdr *) skb->data;
648 if (ieee80211_is_beacon(hdr->frame_control) && priv->ps_enabled)
649 ieee80211_queue_work(priv->hw, &priv->ps_work);
651 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags);
653 ieee80211_rx(priv->hw, skb);
655 spin_lock_irqsave(&priv->rx.rxbuflock, flags);
657 rxbuf->in_process = false;
659 list_move_tail(&rxbuf->list, &priv->rx.rxbuf);
661 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags);
666 void ath9k_htc_rxep(void *drv_priv, struct sk_buff *skb,
667 enum htc_endpoint_id ep_id)
669 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)drv_priv;
670 struct ath_hw *ah = priv->ah;
671 struct ath_common *common = ath9k_hw_common(ah);
672 struct ath9k_htc_rxbuf *rxbuf = NULL, *tmp_buf = NULL;
674 spin_lock(&priv->rx.rxbuflock);
675 list_for_each_entry(tmp_buf, &priv->rx.rxbuf, list) {
676 if (!tmp_buf->in_process) {
681 spin_unlock(&priv->rx.rxbuflock);
684 ath_dbg(common, ATH_DBG_ANY,
685 "No free RX buffer\n");
689 spin_lock(&priv->rx.rxbuflock);
691 rxbuf->in_process = true;
692 spin_unlock(&priv->rx.rxbuflock);
694 tasklet_schedule(&priv->rx_tasklet);
697 dev_kfree_skb_any(skb);
700 /* FIXME: Locking for cleanup/init */
702 void ath9k_rx_cleanup(struct ath9k_htc_priv *priv)
704 struct ath9k_htc_rxbuf *rxbuf, *tbuf;
706 list_for_each_entry_safe(rxbuf, tbuf, &priv->rx.rxbuf, list) {
707 list_del(&rxbuf->list);
709 dev_kfree_skb_any(rxbuf->skb);
714 int ath9k_rx_init(struct ath9k_htc_priv *priv)
716 struct ath_hw *ah = priv->ah;
717 struct ath_common *common = ath9k_hw_common(ah);
718 struct ath9k_htc_rxbuf *rxbuf;
721 INIT_LIST_HEAD(&priv->rx.rxbuf);
722 spin_lock_init(&priv->rx.rxbuflock);
724 for (i = 0; i < ATH9K_HTC_RXBUF; i++) {
725 rxbuf = kzalloc(sizeof(struct ath9k_htc_rxbuf), GFP_KERNEL);
727 ath_err(common, "Unable to allocate RX buffers\n");
730 list_add_tail(&rxbuf->list, &priv->rx.rxbuf);
736 ath9k_rx_cleanup(priv);