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 #define ATH9K_HTC_INIT_TXQ(subtype) do { \
24 qi.tqi_subtype = subtype; \
25 qi.tqi_aifs = ATH9K_TXQ_USEDEFAULT; \
26 qi.tqi_cwmin = ATH9K_TXQ_USEDEFAULT; \
27 qi.tqi_cwmax = ATH9K_TXQ_USEDEFAULT; \
28 qi.tqi_physCompBuf = 0; \
29 qi.tqi_qflags = TXQ_FLAG_TXEOLINT_ENABLE | \
30 TXQ_FLAG_TXDESCINT_ENABLE; \
33 int get_hw_qnum(u16 queue, int *hwq_map)
37 return hwq_map[WME_AC_VO];
39 return hwq_map[WME_AC_VI];
41 return hwq_map[WME_AC_BE];
43 return hwq_map[WME_AC_BK];
45 return hwq_map[WME_AC_BE];
49 int ath_htc_txq_update(struct ath9k_htc_priv *priv, int qnum,
50 struct ath9k_tx_queue_info *qinfo)
52 struct ath_hw *ah = priv->ah;
54 struct ath9k_tx_queue_info qi;
56 ath9k_hw_get_txq_props(ah, qnum, &qi);
58 qi.tqi_aifs = qinfo->tqi_aifs;
59 qi.tqi_cwmin = qinfo->tqi_cwmin / 2; /* XXX */
60 qi.tqi_cwmax = qinfo->tqi_cwmax;
61 qi.tqi_burstTime = qinfo->tqi_burstTime;
62 qi.tqi_readyTime = qinfo->tqi_readyTime;
64 if (!ath9k_hw_set_txq_props(ah, qnum, &qi)) {
65 ath_print(ath9k_hw_common(ah), ATH_DBG_FATAL,
66 "Unable to update hardware queue %u!\n", qnum);
69 ath9k_hw_resettxqueue(ah, qnum);
75 int ath9k_htc_tx_start(struct ath9k_htc_priv *priv, struct sk_buff *skb)
77 struct ieee80211_hdr *hdr;
78 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
79 struct ieee80211_sta *sta = tx_info->control.sta;
80 struct ath9k_htc_sta *ista;
81 struct ath9k_htc_vif *avp;
82 struct ath9k_htc_tx_ctl tx_ctl;
83 enum htc_endpoint_id epid;
89 hdr = (struct ieee80211_hdr *) skb->data;
90 fc = hdr->frame_control;
92 avp = (struct ath9k_htc_vif *) tx_info->control.vif->drv_priv;
94 ista = (struct ath9k_htc_sta *) sta->drv_priv;
95 sta_idx = ista->index;
100 memset(&tx_ctl, 0, sizeof(struct ath9k_htc_tx_ctl));
102 if (ieee80211_is_data(fc)) {
103 struct tx_frame_hdr tx_hdr;
106 memset(&tx_hdr, 0, sizeof(struct tx_frame_hdr));
108 tx_hdr.node_idx = sta_idx;
109 tx_hdr.vif_idx = avp->index;
111 if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) {
112 tx_ctl.type = ATH9K_HTC_AMPDU;
113 tx_hdr.data_type = ATH9K_HTC_AMPDU;
115 tx_ctl.type = ATH9K_HTC_NORMAL;
116 tx_hdr.data_type = ATH9K_HTC_NORMAL;
119 if (ieee80211_is_data(fc)) {
120 qc = ieee80211_get_qos_ctl(hdr);
121 tx_hdr.tidno = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
124 /* Check for RTS protection */
125 if (priv->hw->wiphy->rts_threshold != (u32) -1)
126 if (skb->len > priv->hw->wiphy->rts_threshold)
127 tx_hdr.flags |= ATH9K_HTC_TX_RTSCTS;
130 if (!(tx_hdr.flags & ATH9K_HTC_TX_RTSCTS) &&
131 (priv->op_flags & OP_PROTECT_ENABLE))
132 tx_hdr.flags |= ATH9K_HTC_TX_CTSONLY;
134 tx_hdr.key_type = ath9k_cmn_get_hw_crypto_keytype(skb);
135 if (tx_hdr.key_type == ATH9K_KEY_TYPE_CLEAR)
136 tx_hdr.keyix = (u8) ATH9K_TXKEYIX_INVALID;
138 tx_hdr.keyix = tx_info->control.hw_key->hw_key_idx;
140 tx_fhdr = skb_push(skb, sizeof(tx_hdr));
141 memcpy(tx_fhdr, (u8 *) &tx_hdr, sizeof(tx_hdr));
143 qnum = skb_get_queue_mapping(skb);
147 TX_QSTAT_INC(WME_AC_VO);
148 epid = priv->data_vo_ep;
151 TX_QSTAT_INC(WME_AC_VI);
152 epid = priv->data_vi_ep;
155 TX_QSTAT_INC(WME_AC_BE);
156 epid = priv->data_be_ep;
160 TX_QSTAT_INC(WME_AC_BK);
161 epid = priv->data_bk_ep;
165 struct tx_mgmt_hdr mgmt_hdr;
167 memset(&mgmt_hdr, 0, sizeof(struct tx_mgmt_hdr));
169 tx_ctl.type = ATH9K_HTC_NORMAL;
171 mgmt_hdr.node_idx = sta_idx;
172 mgmt_hdr.vif_idx = avp->index;
176 mgmt_hdr.key_type = ath9k_cmn_get_hw_crypto_keytype(skb);
177 if (mgmt_hdr.key_type == ATH9K_KEY_TYPE_CLEAR)
178 mgmt_hdr.keyix = (u8) ATH9K_TXKEYIX_INVALID;
180 mgmt_hdr.keyix = tx_info->control.hw_key->hw_key_idx;
182 tx_fhdr = skb_push(skb, sizeof(mgmt_hdr));
183 memcpy(tx_fhdr, (u8 *) &mgmt_hdr, sizeof(mgmt_hdr));
184 epid = priv->mgmt_ep;
187 return htc_send(priv->htc, skb, epid, &tx_ctl);
190 static bool ath9k_htc_check_tx_aggr(struct ath9k_htc_priv *priv,
191 struct ath9k_htc_sta *ista, u8 tid)
195 spin_lock_bh(&priv->tx_lock);
196 if ((tid < ATH9K_HTC_MAX_TID) && (ista->tid_state[tid] == AGGR_STOP))
198 spin_unlock_bh(&priv->tx_lock);
203 void ath9k_tx_tasklet(unsigned long data)
205 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data;
206 struct ieee80211_sta *sta;
207 struct ieee80211_hdr *hdr;
208 struct ieee80211_tx_info *tx_info;
209 struct sk_buff *skb = NULL;
212 while ((skb = skb_dequeue(&priv->tx_queue)) != NULL) {
214 hdr = (struct ieee80211_hdr *) skb->data;
215 fc = hdr->frame_control;
216 tx_info = IEEE80211_SKB_CB(skb);
218 memset(&tx_info->status, 0, sizeof(tx_info->status));
222 sta = ieee80211_find_sta(priv->vif, hdr->addr1);
225 ieee80211_tx_status(priv->hw, skb);
229 /* Check if we need to start aggregation */
231 if (sta && conf_is_ht(&priv->hw->conf) &&
232 !(skb->protocol == cpu_to_be16(ETH_P_PAE))) {
233 if (ieee80211_is_data_qos(fc)) {
235 struct ath9k_htc_sta *ista;
237 qc = ieee80211_get_qos_ctl(hdr);
239 ista = (struct ath9k_htc_sta *)sta->drv_priv;
241 if (ath9k_htc_check_tx_aggr(priv, ista, tid)) {
242 ieee80211_start_tx_ba_session(sta, tid);
243 spin_lock_bh(&priv->tx_lock);
244 ista->tid_state[tid] = AGGR_PROGRESS;
245 spin_unlock_bh(&priv->tx_lock);
252 /* Send status to mac80211 */
253 ieee80211_tx_status(priv->hw, skb);
256 /* Wake TX queues if needed */
257 spin_lock_bh(&priv->tx_lock);
258 if (priv->tx_queues_stop) {
259 priv->tx_queues_stop = false;
260 spin_unlock_bh(&priv->tx_lock);
261 ath_print(ath9k_hw_common(priv->ah), ATH_DBG_XMIT,
262 "Waking up TX queues\n");
263 ieee80211_wake_queues(priv->hw);
266 spin_unlock_bh(&priv->tx_lock);
269 void ath9k_htc_txep(void *drv_priv, struct sk_buff *skb,
270 enum htc_endpoint_id ep_id, bool txok)
272 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *) drv_priv;
273 struct ath_common *common = ath9k_hw_common(priv->ah);
274 struct ieee80211_tx_info *tx_info;
279 if (ep_id == priv->mgmt_ep) {
280 skb_pull(skb, sizeof(struct tx_mgmt_hdr));
281 } else if ((ep_id == priv->data_bk_ep) ||
282 (ep_id == priv->data_be_ep) ||
283 (ep_id == priv->data_vi_ep) ||
284 (ep_id == priv->data_vo_ep)) {
285 skb_pull(skb, sizeof(struct tx_frame_hdr));
287 ath_print(common, ATH_DBG_FATAL,
288 "Unsupported TX EPID: %d\n", ep_id);
289 dev_kfree_skb_any(skb);
293 tx_info = IEEE80211_SKB_CB(skb);
296 tx_info->flags |= IEEE80211_TX_STAT_ACK;
298 skb_queue_tail(&priv->tx_queue, skb);
299 tasklet_schedule(&priv->tx_tasklet);
302 int ath9k_tx_init(struct ath9k_htc_priv *priv)
304 skb_queue_head_init(&priv->tx_queue);
308 void ath9k_tx_cleanup(struct ath9k_htc_priv *priv)
313 bool ath9k_htc_txq_setup(struct ath9k_htc_priv *priv, int subtype)
315 struct ath_hw *ah = priv->ah;
316 struct ath_common *common = ath9k_hw_common(ah);
317 struct ath9k_tx_queue_info qi;
320 memset(&qi, 0, sizeof(qi));
321 ATH9K_HTC_INIT_TXQ(subtype);
323 qnum = ath9k_hw_setuptxqueue(priv->ah, ATH9K_TX_QUEUE_DATA, &qi);
327 if (qnum >= ARRAY_SIZE(priv->hwq_map)) {
328 ath_print(common, ATH_DBG_FATAL,
329 "qnum %u out of range, max %u!\n",
330 qnum, (unsigned int)ARRAY_SIZE(priv->hwq_map));
331 ath9k_hw_releasetxqueue(ah, qnum);
335 priv->hwq_map[subtype] = qnum;
339 int ath9k_htc_cabq_setup(struct ath9k_htc_priv *priv)
341 struct ath9k_tx_queue_info qi;
343 memset(&qi, 0, sizeof(qi));
344 ATH9K_HTC_INIT_TXQ(0);
346 return ath9k_hw_setuptxqueue(priv->ah, ATH9K_TX_QUEUE_CAB, &qi);
354 * Calculate the RX filter to be set in the HW.
356 u32 ath9k_htc_calcrxfilter(struct ath9k_htc_priv *priv)
358 #define RX_FILTER_PRESERVE (ATH9K_RX_FILTER_PHYERR | ATH9K_RX_FILTER_PHYRADAR)
360 struct ath_hw *ah = priv->ah;
363 rfilt = (ath9k_hw_getrxfilter(ah) & RX_FILTER_PRESERVE)
364 | ATH9K_RX_FILTER_UCAST | ATH9K_RX_FILTER_BCAST
365 | ATH9K_RX_FILTER_MCAST;
367 /* If not a STA, enable processing of Probe Requests */
368 if (ah->opmode != NL80211_IFTYPE_STATION)
369 rfilt |= ATH9K_RX_FILTER_PROBEREQ;
372 * Set promiscuous mode when FIF_PROMISC_IN_BSS is enabled for station
373 * mode interface or when in monitor mode. AP mode does not need this
374 * since it receives all in-BSS frames anyway.
376 if (((ah->opmode != NL80211_IFTYPE_AP) &&
377 (priv->rxfilter & FIF_PROMISC_IN_BSS)) ||
378 (ah->opmode == NL80211_IFTYPE_MONITOR))
379 rfilt |= ATH9K_RX_FILTER_PROM;
381 if (priv->rxfilter & FIF_CONTROL)
382 rfilt |= ATH9K_RX_FILTER_CONTROL;
384 if ((ah->opmode == NL80211_IFTYPE_STATION) &&
385 !(priv->rxfilter & FIF_BCN_PRBRESP_PROMISC))
386 rfilt |= ATH9K_RX_FILTER_MYBEACON;
388 rfilt |= ATH9K_RX_FILTER_BEACON;
390 if (conf_is_ht(&priv->hw->conf))
391 rfilt |= ATH9K_RX_FILTER_COMP_BAR;
395 #undef RX_FILTER_PRESERVE
399 * Recv initialization for opmode change.
401 static void ath9k_htc_opmode_init(struct ath9k_htc_priv *priv)
403 struct ath_hw *ah = priv->ah;
404 struct ath_common *common = ath9k_hw_common(ah);
408 /* configure rx filter */
409 rfilt = ath9k_htc_calcrxfilter(priv);
410 ath9k_hw_setrxfilter(ah, rfilt);
412 /* configure bssid mask */
413 if (ah->caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK)
414 ath_hw_setbssidmask(common);
416 /* configure operational mode */
417 ath9k_hw_setopmode(ah);
419 /* calculate and install multicast filter */
420 mfilt[0] = mfilt[1] = ~0;
421 ath9k_hw_setmcastfilter(ah, mfilt[0], mfilt[1]);
424 void ath9k_host_rx_init(struct ath9k_htc_priv *priv)
426 ath9k_hw_rxena(priv->ah);
427 ath9k_htc_opmode_init(priv);
428 ath9k_hw_startpcureceive(priv->ah, (priv->op_flags & OP_SCANNING));
429 priv->rx.last_rssi = ATH_RSSI_DUMMY_MARKER;
432 static void ath9k_process_rate(struct ieee80211_hw *hw,
433 struct ieee80211_rx_status *rxs,
434 u8 rx_rate, u8 rs_flags)
436 struct ieee80211_supported_band *sband;
437 enum ieee80211_band band;
440 if (rx_rate & 0x80) {
442 rxs->flag |= RX_FLAG_HT;
443 if (rs_flags & ATH9K_RX_2040)
444 rxs->flag |= RX_FLAG_40MHZ;
445 if (rs_flags & ATH9K_RX_GI)
446 rxs->flag |= RX_FLAG_SHORT_GI;
447 rxs->rate_idx = rx_rate & 0x7f;
451 band = hw->conf.channel->band;
452 sband = hw->wiphy->bands[band];
454 for (i = 0; i < sband->n_bitrates; i++) {
455 if (sband->bitrates[i].hw_value == rx_rate) {
459 if (sband->bitrates[i].hw_value_short == rx_rate) {
461 rxs->flag |= RX_FLAG_SHORTPRE;
468 static bool ath9k_rx_prepare(struct ath9k_htc_priv *priv,
469 struct ath9k_htc_rxbuf *rxbuf,
470 struct ieee80211_rx_status *rx_status)
473 struct ieee80211_hdr *hdr;
474 struct ieee80211_hw *hw = priv->hw;
475 struct sk_buff *skb = rxbuf->skb;
476 struct ath_common *common = ath9k_hw_common(priv->ah);
477 struct ath_htc_rx_status *rxstatus;
478 int hdrlen, padpos, padsize;
479 int last_rssi = ATH_RSSI_DUMMY_MARKER;
482 if (skb->len <= HTC_RX_FRAME_HEADER_SIZE) {
483 ath_print(common, ATH_DBG_FATAL,
484 "Corrupted RX frame, dropping\n");
488 rxstatus = (struct ath_htc_rx_status *)skb->data;
490 if (be16_to_cpu(rxstatus->rs_datalen) -
491 (skb->len - HTC_RX_FRAME_HEADER_SIZE) != 0) {
492 ath_print(common, ATH_DBG_FATAL,
493 "Corrupted RX data len, dropping "
494 "(dlen: %d, skblen: %d)\n",
495 rxstatus->rs_datalen, skb->len);
499 /* Get the RX status information */
500 memcpy(&rxbuf->rxstatus, rxstatus, HTC_RX_FRAME_HEADER_SIZE);
501 skb_pull(skb, HTC_RX_FRAME_HEADER_SIZE);
503 hdr = (struct ieee80211_hdr *)skb->data;
504 fc = hdr->frame_control;
505 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
507 padpos = ath9k_cmn_padpos(fc);
509 padsize = padpos & 3;
510 if (padsize && skb->len >= padpos+padsize+FCS_LEN) {
511 memmove(skb->data + padsize, skb->data, padpos);
512 skb_pull(skb, padsize);
515 memset(rx_status, 0, sizeof(struct ieee80211_rx_status));
517 if (rxbuf->rxstatus.rs_status != 0) {
518 if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_CRC)
519 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
520 if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_PHY)
523 if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_DECRYPT) {
525 } else if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_MIC) {
526 if (ieee80211_is_ctl(fc))
528 * Sometimes, we get invalid
529 * MIC failures on valid control frames.
530 * Remove these mic errors.
532 rxbuf->rxstatus.rs_status &= ~ATH9K_RXERR_MIC;
534 rx_status->flag |= RX_FLAG_MMIC_ERROR;
538 * Reject error frames with the exception of
539 * decryption and MIC failures. For monitor mode,
540 * we also ignore the CRC error.
542 if (priv->ah->opmode == NL80211_IFTYPE_MONITOR) {
543 if (rxbuf->rxstatus.rs_status &
544 ~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC |
548 if (rxbuf->rxstatus.rs_status &
549 ~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC)) {
555 if (!(rxbuf->rxstatus.rs_status & ATH9K_RXERR_DECRYPT)) {
557 keyix = rxbuf->rxstatus.rs_keyix;
558 if (keyix != ATH9K_RXKEYIX_INVALID) {
559 rx_status->flag |= RX_FLAG_DECRYPTED;
560 } else if (ieee80211_has_protected(fc) &&
561 skb->len >= hdrlen + 4) {
562 keyix = skb->data[hdrlen + 3] >> 6;
563 if (test_bit(keyix, common->keymap))
564 rx_status->flag |= RX_FLAG_DECRYPTED;
568 ath9k_process_rate(hw, rx_status, rxbuf->rxstatus.rs_rate,
569 rxbuf->rxstatus.rs_flags);
571 if (priv->op_flags & OP_ASSOCIATED) {
572 if (rxbuf->rxstatus.rs_rssi != ATH9K_RSSI_BAD &&
573 !rxbuf->rxstatus.rs_moreaggr)
574 ATH_RSSI_LPF(priv->rx.last_rssi,
575 rxbuf->rxstatus.rs_rssi);
577 last_rssi = priv->rx.last_rssi;
579 if (likely(last_rssi != ATH_RSSI_DUMMY_MARKER))
580 rxbuf->rxstatus.rs_rssi = ATH_EP_RND(last_rssi,
581 ATH_RSSI_EP_MULTIPLIER);
583 if (rxbuf->rxstatus.rs_rssi < 0)
584 rxbuf->rxstatus.rs_rssi = 0;
586 if (ieee80211_is_beacon(fc))
587 priv->ah->stats.avgbrssi = rxbuf->rxstatus.rs_rssi;
590 rx_status->mactime = be64_to_cpu(rxbuf->rxstatus.rs_tstamp);
591 rx_status->band = hw->conf.channel->band;
592 rx_status->freq = hw->conf.channel->center_freq;
593 rx_status->signal = rxbuf->rxstatus.rs_rssi + ATH_DEFAULT_NOISE_FLOOR;
594 rx_status->antenna = rxbuf->rxstatus.rs_antenna;
595 rx_status->flag |= RX_FLAG_TSFT;
604 * FIXME: Handle FLUSH later on.
606 void ath9k_rx_tasklet(unsigned long data)
608 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data;
609 struct ath9k_htc_rxbuf *rxbuf = NULL, *tmp_buf = NULL;
610 struct ieee80211_rx_status rx_status;
613 struct ieee80211_hdr *hdr;
616 spin_lock_irqsave(&priv->rx.rxbuflock, flags);
617 list_for_each_entry(tmp_buf, &priv->rx.rxbuf, list) {
618 if (tmp_buf->in_process) {
625 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags);
632 if (!ath9k_rx_prepare(priv, rxbuf, &rx_status)) {
633 dev_kfree_skb_any(rxbuf->skb);
637 memcpy(IEEE80211_SKB_RXCB(rxbuf->skb), &rx_status,
638 sizeof(struct ieee80211_rx_status));
640 hdr = (struct ieee80211_hdr *) skb->data;
642 if (ieee80211_is_beacon(hdr->frame_control) && priv->ps_enabled)
643 ieee80211_queue_work(priv->hw, &priv->ps_work);
645 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags);
647 ieee80211_rx(priv->hw, skb);
649 spin_lock_irqsave(&priv->rx.rxbuflock, flags);
651 rxbuf->in_process = false;
653 list_move_tail(&rxbuf->list, &priv->rx.rxbuf);
655 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags);
660 void ath9k_htc_rxep(void *drv_priv, struct sk_buff *skb,
661 enum htc_endpoint_id ep_id)
663 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)drv_priv;
664 struct ath_hw *ah = priv->ah;
665 struct ath_common *common = ath9k_hw_common(ah);
666 struct ath9k_htc_rxbuf *rxbuf = NULL, *tmp_buf = NULL;
668 spin_lock(&priv->rx.rxbuflock);
669 list_for_each_entry(tmp_buf, &priv->rx.rxbuf, list) {
670 if (!tmp_buf->in_process) {
675 spin_unlock(&priv->rx.rxbuflock);
678 ath_print(common, ATH_DBG_ANY,
679 "No free RX buffer\n");
683 spin_lock(&priv->rx.rxbuflock);
685 rxbuf->in_process = true;
686 spin_unlock(&priv->rx.rxbuflock);
688 tasklet_schedule(&priv->rx_tasklet);
691 dev_kfree_skb_any(skb);
694 /* FIXME: Locking for cleanup/init */
696 void ath9k_rx_cleanup(struct ath9k_htc_priv *priv)
698 struct ath9k_htc_rxbuf *rxbuf, *tbuf;
700 list_for_each_entry_safe(rxbuf, tbuf, &priv->rx.rxbuf, list) {
701 list_del(&rxbuf->list);
703 dev_kfree_skb_any(rxbuf->skb);
708 int ath9k_rx_init(struct ath9k_htc_priv *priv)
710 struct ath_hw *ah = priv->ah;
711 struct ath_common *common = ath9k_hw_common(ah);
712 struct ath9k_htc_rxbuf *rxbuf;
715 INIT_LIST_HEAD(&priv->rx.rxbuf);
716 spin_lock_init(&priv->rx.rxbuflock);
718 for (i = 0; i < ATH9K_HTC_RXBUF; i++) {
719 rxbuf = kzalloc(sizeof(struct ath9k_htc_rxbuf), GFP_KERNEL);
721 ath_print(common, ATH_DBG_FATAL,
722 "Unable to allocate RX buffers\n");
725 list_add_tail(&rxbuf->list, &priv->rx.rxbuf);
731 ath9k_rx_cleanup(priv);