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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / net / wireless / ath / ath9k / htc_drv_txrx.c
blob218ab3ab6f6190b8635e8b10d0a935f0a74209ba
1 /*
2 * Copyright (c) 2010 Atheros Communications Inc.
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
17 #include "htc.h"
18
19 /******/
20 /* TX */
21 /******/
22
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; \
31 } while (0)
32
33 int get_hw_qnum(u16 queue, int *hwq_map)
34 {
35 switch (queue) {
36 case 0:
37 return hwq_map[WME_AC_VO];
38 case 1:
39 return hwq_map[WME_AC_VI];
40 case 2:
41 return hwq_map[WME_AC_BE];
42 case 3:
43 return hwq_map[WME_AC_BK];
44 default:
45 return hwq_map[WME_AC_BE];
46 }
47 }
48
49 int ath_htc_txq_update(struct ath9k_htc_priv *priv, int qnum,
50 struct ath9k_tx_queue_info *qinfo)
51 {
52 struct ath_hw *ah = priv->ah;
53 int error = 0;
54 struct ath9k_tx_queue_info qi;
55
56 ath9k_hw_get_txq_props(ah, qnum, &qi);
57
58 qi.tqi_aifs = qinfo->tqi_aifs;
59 qi.tqi_cwmin = qinfo->tqi_cwmin / 2;
60 qi.tqi_cwmax = qinfo->tqi_cwmax;
61 qi.tqi_burstTime = qinfo->tqi_burstTime;
62 qi.tqi_readyTime = qinfo->tqi_readyTime;
63
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);
67 error = -EIO;
68 } else {
69 ath9k_hw_resettxqueue(ah, qnum);
70 }
71
72 return error;
73 }
74
75 int ath9k_htc_tx_start(struct ath9k_htc_priv *priv, struct sk_buff *skb)
76 {
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_tx_ctl tx_ctl;
82 enum htc_endpoint_id epid;
83 u16 qnum;
84 __le16 fc;
85 u8 *tx_fhdr;
86 u8 sta_idx, vif_idx;
87
88 hdr = (struct ieee80211_hdr *) skb->data;
89 fc = hdr->frame_control;
90
91 if (tx_info->control.vif &&
92 (struct ath9k_htc_vif *) tx_info->control.vif->drv_priv)
93 vif_idx = ((struct ath9k_htc_vif *)
94 tx_info->control.vif->drv_priv)->index;
95 else
96 vif_idx = priv->nvifs;
97
98 if (sta) {
99 ista = (struct ath9k_htc_sta *) sta->drv_priv;
100 sta_idx = ista->index;
101 } else {
102 sta_idx = 0;
103 }
104
105 memset(&tx_ctl, 0, sizeof(struct ath9k_htc_tx_ctl));
106
107 if (ieee80211_is_data(fc)) {
108 struct tx_frame_hdr tx_hdr;
109 u8 *qc;
110
111 memset(&tx_hdr, 0, sizeof(struct tx_frame_hdr));
112
113 tx_hdr.node_idx = sta_idx;
114 tx_hdr.vif_idx = vif_idx;
115
116 if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) {
117 tx_ctl.type = ATH9K_HTC_AMPDU;
118 tx_hdr.data_type = ATH9K_HTC_AMPDU;
119 } else {
120 tx_ctl.type = ATH9K_HTC_NORMAL;
121 tx_hdr.data_type = ATH9K_HTC_NORMAL;
122 }
123
124 if (ieee80211_is_data_qos(fc)) {
125 qc = ieee80211_get_qos_ctl(hdr);
126 tx_hdr.tidno = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
127 }
128
129 /* Check for RTS protection */
130 if (priv->hw->wiphy->rts_threshold != (u32) -1)
131 if (skb->len > priv->hw->wiphy->rts_threshold)
132 tx_hdr.flags |= ATH9K_HTC_TX_RTSCTS;
133
134 /* CTS-to-self */
135 if (!(tx_hdr.flags & ATH9K_HTC_TX_RTSCTS) &&
136 (priv->op_flags & OP_PROTECT_ENABLE))
137 tx_hdr.flags |= ATH9K_HTC_TX_CTSONLY;
138
139 tx_hdr.key_type = ath9k_cmn_get_hw_crypto_keytype(skb);
140 if (tx_hdr.key_type == ATH9K_KEY_TYPE_CLEAR)
141 tx_hdr.keyix = (u8) ATH9K_TXKEYIX_INVALID;
142 else
143 tx_hdr.keyix = tx_info->control.hw_key->hw_key_idx;
144
145 tx_fhdr = skb_push(skb, sizeof(tx_hdr));
146 memcpy(tx_fhdr, (u8 *) &tx_hdr, sizeof(tx_hdr));
147
148 qnum = skb_get_queue_mapping(skb);
149
150 switch (qnum) {
151 case 0:
152 TX_QSTAT_INC(WME_AC_VO);
153 epid = priv->data_vo_ep;
154 break;
155 case 1:
156 TX_QSTAT_INC(WME_AC_VI);
157 epid = priv->data_vi_ep;
158 break;
159 case 2:
160 TX_QSTAT_INC(WME_AC_BE);
161 epid = priv->data_be_ep;
162 break;
163 case 3:
164 default:
165 TX_QSTAT_INC(WME_AC_BK);
166 epid = priv->data_bk_ep;
167 break;
168 }
169 } else {
170 struct tx_mgmt_hdr mgmt_hdr;
171
172 memset(&mgmt_hdr, 0, sizeof(struct tx_mgmt_hdr));
173
174 tx_ctl.type = ATH9K_HTC_NORMAL;
175
176 mgmt_hdr.node_idx = sta_idx;
177 mgmt_hdr.vif_idx = vif_idx;
178 mgmt_hdr.tidno = 0;
179 mgmt_hdr.flags = 0;
180
181 mgmt_hdr.key_type = ath9k_cmn_get_hw_crypto_keytype(skb);
182 if (mgmt_hdr.key_type == ATH9K_KEY_TYPE_CLEAR)
183 mgmt_hdr.keyix = (u8) ATH9K_TXKEYIX_INVALID;
184 else
185 mgmt_hdr.keyix = tx_info->control.hw_key->hw_key_idx;
186
187 tx_fhdr = skb_push(skb, sizeof(mgmt_hdr));
188 memcpy(tx_fhdr, (u8 *) &mgmt_hdr, sizeof(mgmt_hdr));
189 epid = priv->mgmt_ep;
190 }
191
192 return htc_send(priv->htc, skb, epid, &tx_ctl);
193 }
194
195 static bool ath9k_htc_check_tx_aggr(struct ath9k_htc_priv *priv,
196 struct ath9k_htc_sta *ista, u8 tid)
197 {
198 bool ret = false;
199
200 spin_lock_bh(&priv->tx_lock);
201 if ((tid < ATH9K_HTC_MAX_TID) && (ista->tid_state[tid] == AGGR_STOP))
202 ret = true;
203 spin_unlock_bh(&priv->tx_lock);
204
205 return ret;
206 }
207
208 void ath9k_tx_tasklet(unsigned long data)
209 {
210 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data;
211 struct ieee80211_sta *sta;
212 struct ieee80211_hdr *hdr;
213 struct ieee80211_tx_info *tx_info;
214 struct sk_buff *skb = NULL;
215 __le16 fc;
216
217 while ((skb = skb_dequeue(&priv->tx_queue)) != NULL) {
218
219 hdr = (struct ieee80211_hdr *) skb->data;
220 fc = hdr->frame_control;
221 tx_info = IEEE80211_SKB_CB(skb);
222
223 memset(&tx_info->status, 0, sizeof(tx_info->status));
224
225 rcu_read_lock();
226
227 sta = ieee80211_find_sta(priv->vif, hdr->addr1);
228 if (!sta) {
229 rcu_read_unlock();
230 ieee80211_tx_status(priv->hw, skb);
231 continue;
232 }
233
234 /* Check if we need to start aggregation */
235
236 if (sta && conf_is_ht(&priv->hw->conf) &&
237 !(skb->protocol == cpu_to_be16(ETH_P_PAE))) {
238 if (ieee80211_is_data_qos(fc)) {
239 u8 *qc, tid;
240 struct ath9k_htc_sta *ista;
241
242 qc = ieee80211_get_qos_ctl(hdr);
243 tid = qc[0] & 0xf;
244 ista = (struct ath9k_htc_sta *)sta->drv_priv;
245
246 if (ath9k_htc_check_tx_aggr(priv, ista, tid)) {
247 ieee80211_start_tx_ba_session(sta, tid);
248 spin_lock_bh(&priv->tx_lock);
249 ista->tid_state[tid] = AGGR_PROGRESS;
250 spin_unlock_bh(&priv->tx_lock);
251 }
252 }
253 }
254
255 rcu_read_unlock();
256
257 /* Send status to mac80211 */
258 ieee80211_tx_status(priv->hw, skb);
259 }
260
261 /* Wake TX queues if needed */
262 spin_lock_bh(&priv->tx_lock);
263 if (priv->tx_queues_stop) {
264 priv->tx_queues_stop = false;
265 spin_unlock_bh(&priv->tx_lock);
266 ath_print(ath9k_hw_common(priv->ah), ATH_DBG_XMIT,
267 "Waking up TX queues\n");
268 ieee80211_wake_queues(priv->hw);
269 return;
270 }
271 spin_unlock_bh(&priv->tx_lock);
272 }
273
274 void ath9k_htc_txep(void *drv_priv, struct sk_buff *skb,
275 enum htc_endpoint_id ep_id, bool txok)
276 {
277 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *) drv_priv;
278 struct ath_common *common = ath9k_hw_common(priv->ah);
279 struct ieee80211_tx_info *tx_info;
280
281 if (!skb)
282 return;
283
284 if (ep_id == priv->mgmt_ep) {
285 skb_pull(skb, sizeof(struct tx_mgmt_hdr));
286 } else if ((ep_id == priv->data_bk_ep) ||
287 (ep_id == priv->data_be_ep) ||
288 (ep_id == priv->data_vi_ep) ||
289 (ep_id == priv->data_vo_ep)) {
290 skb_pull(skb, sizeof(struct tx_frame_hdr));
291 } else {
292 ath_print(common, ATH_DBG_FATAL,
293 "Unsupported TX EPID: %d\n", ep_id);
294 dev_kfree_skb_any(skb);
295 return;
296 }
297
298 tx_info = IEEE80211_SKB_CB(skb);
299
300 if (txok)
301 tx_info->flags |= IEEE80211_TX_STAT_ACK;
302
303 skb_queue_tail(&priv->tx_queue, skb);
304 tasklet_schedule(&priv->tx_tasklet);
305 }
306
307 int ath9k_tx_init(struct ath9k_htc_priv *priv)
308 {
309 skb_queue_head_init(&priv->tx_queue);
310 return 0;
311 }
312
313 void ath9k_tx_cleanup(struct ath9k_htc_priv *priv)
314 {
315
316 }
317
318 bool ath9k_htc_txq_setup(struct ath9k_htc_priv *priv, int subtype)
319 {
320 struct ath_hw *ah = priv->ah;
321 struct ath_common *common = ath9k_hw_common(ah);
322 struct ath9k_tx_queue_info qi;
323 int qnum;
324
325 memset(&qi, 0, sizeof(qi));
326 ATH9K_HTC_INIT_TXQ(subtype);
327
328 qnum = ath9k_hw_setuptxqueue(priv->ah, ATH9K_TX_QUEUE_DATA, &qi);
329 if (qnum == -1)
330 return false;
331
332 if (qnum >= ARRAY_SIZE(priv->hwq_map)) {
333 ath_print(common, ATH_DBG_FATAL,
334 "qnum %u out of range, max %u!\n",
335 qnum, (unsigned int)ARRAY_SIZE(priv->hwq_map));
336 ath9k_hw_releasetxqueue(ah, qnum);
337 return false;
338 }
339
340 priv->hwq_map[subtype] = qnum;
341 return true;
342 }
343
344 int ath9k_htc_cabq_setup(struct ath9k_htc_priv *priv)
345 {
346 struct ath9k_tx_queue_info qi;
347
348 memset(&qi, 0, sizeof(qi));
349 ATH9K_HTC_INIT_TXQ(0);
350
351 return ath9k_hw_setuptxqueue(priv->ah, ATH9K_TX_QUEUE_CAB, &qi);
352 }
353
354 /******/
355 /* RX */
356 /******/
357
358 /*
359 * Calculate the RX filter to be set in the HW.
360 */
361 u32 ath9k_htc_calcrxfilter(struct ath9k_htc_priv *priv)
362 {
363 #define RX_FILTER_PRESERVE (ATH9K_RX_FILTER_PHYERR | ATH9K_RX_FILTER_PHYRADAR)
364
365 struct ath_hw *ah = priv->ah;
366 u32 rfilt;
367
368 rfilt = (ath9k_hw_getrxfilter(ah) & RX_FILTER_PRESERVE)
369 | ATH9K_RX_FILTER_UCAST | ATH9K_RX_FILTER_BCAST
370 | ATH9K_RX_FILTER_MCAST;
371
372 /* If not a STA, enable processing of Probe Requests */
373 if (ah->opmode != NL80211_IFTYPE_STATION)
374 rfilt |= ATH9K_RX_FILTER_PROBEREQ;
375
376 /*
377 * Set promiscuous mode when FIF_PROMISC_IN_BSS is enabled for station
378 * mode interface or when in monitor mode. AP mode does not need this
379 * since it receives all in-BSS frames anyway.
380 */
381 if (((ah->opmode != NL80211_IFTYPE_AP) &&
382 (priv->rxfilter & FIF_PROMISC_IN_BSS)) ||
383 (ah->opmode == NL80211_IFTYPE_MONITOR))
384 rfilt |= ATH9K_RX_FILTER_PROM;
385
386 if (priv->rxfilter & FIF_CONTROL)
387 rfilt |= ATH9K_RX_FILTER_CONTROL;
388
389 if ((ah->opmode == NL80211_IFTYPE_STATION) &&
390 !(priv->rxfilter & FIF_BCN_PRBRESP_PROMISC))
391 rfilt |= ATH9K_RX_FILTER_MYBEACON;
392 else
393 rfilt |= ATH9K_RX_FILTER_BEACON;
394
395 if (conf_is_ht(&priv->hw->conf))
396 rfilt |= ATH9K_RX_FILTER_COMP_BAR;
397
398 return rfilt;
399
400 #undef RX_FILTER_PRESERVE
401 }
402
403 /*
404 * Recv initialization for opmode change.
405 */
406 static void ath9k_htc_opmode_init(struct ath9k_htc_priv *priv)
407 {
408 struct ath_hw *ah = priv->ah;
409 struct ath_common *common = ath9k_hw_common(ah);
410
411 u32 rfilt, mfilt[2];
412
413 /* configure rx filter */
414 rfilt = ath9k_htc_calcrxfilter(priv);
415 ath9k_hw_setrxfilter(ah, rfilt);
416
417 /* configure bssid mask */
418 if (ah->caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK)
419 ath_hw_setbssidmask(common);
420
421 /* configure operational mode */
422 ath9k_hw_setopmode(ah);
423
424 /* calculate and install multicast filter */
425 mfilt[0] = mfilt[1] = ~0;
426 ath9k_hw_setmcastfilter(ah, mfilt[0], mfilt[1]);
427 }
428
429 void ath9k_host_rx_init(struct ath9k_htc_priv *priv)
430 {
431 ath9k_hw_rxena(priv->ah);
432 ath9k_htc_opmode_init(priv);
433 ath9k_hw_startpcureceive(priv->ah, (priv->op_flags & OP_SCANNING));
434 priv->rx.last_rssi = ATH_RSSI_DUMMY_MARKER;
435 }
436
437 static void ath9k_process_rate(struct ieee80211_hw *hw,
438 struct ieee80211_rx_status *rxs,
439 u8 rx_rate, u8 rs_flags)
440 {
441 struct ieee80211_supported_band *sband;
442 enum ieee80211_band band;
443 unsigned int i = 0;
444
445 if (rx_rate & 0x80) {
446 /* HT rate */
447 rxs->flag |= RX_FLAG_HT;
448 if (rs_flags & ATH9K_RX_2040)
449 rxs->flag |= RX_FLAG_40MHZ;
450 if (rs_flags & ATH9K_RX_GI)
451 rxs->flag |= RX_FLAG_SHORT_GI;
452 rxs->rate_idx = rx_rate & 0x7f;
453 return;
454 }
455
456 band = hw->conf.channel->band;
457 sband = hw->wiphy->bands[band];
458
459 for (i = 0; i < sband->n_bitrates; i++) {
460 if (sband->bitrates[i].hw_value == rx_rate) {
461 rxs->rate_idx = i;
462 return;
463 }
464 if (sband->bitrates[i].hw_value_short == rx_rate) {
465 rxs->rate_idx = i;
466 rxs->flag |= RX_FLAG_SHORTPRE;
467 return;
468 }
469 }
470
471 }
472
473 static bool ath9k_rx_prepare(struct ath9k_htc_priv *priv,
474 struct ath9k_htc_rxbuf *rxbuf,
475 struct ieee80211_rx_status *rx_status)
476
477 {
478 struct ieee80211_hdr *hdr;
479 struct ieee80211_hw *hw = priv->hw;
480 struct sk_buff *skb = rxbuf->skb;
481 struct ath_common *common = ath9k_hw_common(priv->ah);
482 struct ath_htc_rx_status *rxstatus;
483 int hdrlen, padpos, padsize;
484 int last_rssi = ATH_RSSI_DUMMY_MARKER;
485 __le16 fc;
486
487 if (skb->len <= HTC_RX_FRAME_HEADER_SIZE) {
488 ath_print(common, ATH_DBG_FATAL,
489 "Corrupted RX frame, dropping\n");
490 goto rx_next;
491 }
492
493 rxstatus = (struct ath_htc_rx_status *)skb->data;
494
495 if (be16_to_cpu(rxstatus->rs_datalen) -
496 (skb->len - HTC_RX_FRAME_HEADER_SIZE) != 0) {
497 ath_print(common, ATH_DBG_FATAL,
498 "Corrupted RX data len, dropping "
499 "(dlen: %d, skblen: %d)\n",
500 rxstatus->rs_datalen, skb->len);
501 goto rx_next;
502 }
503
504 /* Get the RX status information */
505 memcpy(&rxbuf->rxstatus, rxstatus, HTC_RX_FRAME_HEADER_SIZE);
506 skb_pull(skb, HTC_RX_FRAME_HEADER_SIZE);
507
508 hdr = (struct ieee80211_hdr *)skb->data;
509 fc = hdr->frame_control;
510 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
511
512 padpos = ath9k_cmn_padpos(fc);
513
514 padsize = padpos & 3;
515 if (padsize && skb->len >= padpos+padsize+FCS_LEN) {
516 memmove(skb->data + padsize, skb->data, padpos);
517 skb_pull(skb, padsize);
518 }
519
520 memset(rx_status, 0, sizeof(struct ieee80211_rx_status));
521
522 if (rxbuf->rxstatus.rs_status != 0) {
523 if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_CRC)
524 rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
525 if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_PHY)
526 goto rx_next;
527
528 if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_DECRYPT) {
529 } else if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_MIC) {
530 if (ieee80211_is_ctl(fc))
531 /*
532 * Sometimes, we get invalid
533 * MIC failures on valid control frames.
534 * Remove these mic errors.
535 */
536 rxbuf->rxstatus.rs_status &= ~ATH9K_RXERR_MIC;
537 else
538 rx_status->flag |= RX_FLAG_MMIC_ERROR;
539 }
540
541 /*
542 * Reject error frames with the exception of
543 * decryption and MIC failures. For monitor mode,
544 * we also ignore the CRC error.
545 */
546 if (priv->ah->opmode == NL80211_IFTYPE_MONITOR) {
547 if (rxbuf->rxstatus.rs_status &
548 ~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC |
549 ATH9K_RXERR_CRC))
550 goto rx_next;
551 } else {
552 if (rxbuf->rxstatus.rs_status &
553 ~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC)) {
554 goto rx_next;
555 }
556 }
557 }
558
559 if (!(rxbuf->rxstatus.rs_status & ATH9K_RXERR_DECRYPT)) {
560 u8 keyix;
561 keyix = rxbuf->rxstatus.rs_keyix;
562 if (keyix != ATH9K_RXKEYIX_INVALID) {
563 rx_status->flag |= RX_FLAG_DECRYPTED;
564 } else if (ieee80211_has_protected(fc) &&
565 skb->len >= hdrlen + 4) {
566 keyix = skb->data[hdrlen + 3] >> 6;
567 if (test_bit(keyix, common->keymap))
568 rx_status->flag |= RX_FLAG_DECRYPTED;
569 }
570 }
571
572 ath9k_process_rate(hw, rx_status, rxbuf->rxstatus.rs_rate,
573 rxbuf->rxstatus.rs_flags);
574
575 if (priv->op_flags & OP_ASSOCIATED) {
576 if (rxbuf->rxstatus.rs_rssi != ATH9K_RSSI_BAD &&
577 !rxbuf->rxstatus.rs_moreaggr)
578 ATH_RSSI_LPF(priv->rx.last_rssi,
579 rxbuf->rxstatus.rs_rssi);
580
581 last_rssi = priv->rx.last_rssi;
582
583 if (likely(last_rssi != ATH_RSSI_DUMMY_MARKER))
584 rxbuf->rxstatus.rs_rssi = ATH_EP_RND(last_rssi,
585 ATH_RSSI_EP_MULTIPLIER);
586
587 if (rxbuf->rxstatus.rs_rssi < 0)
588 rxbuf->rxstatus.rs_rssi = 0;
589
590 if (ieee80211_is_beacon(fc))
591 priv->ah->stats.avgbrssi = rxbuf->rxstatus.rs_rssi;
592 }
593
594 rx_status->mactime = be64_to_cpu(rxbuf->rxstatus.rs_tstamp);
595 rx_status->band = hw->conf.channel->band;
596 rx_status->freq = hw->conf.channel->center_freq;
597 rx_status->signal = rxbuf->rxstatus.rs_rssi + ATH_DEFAULT_NOISE_FLOOR;
598 rx_status->antenna = rxbuf->rxstatus.rs_antenna;
599 rx_status->flag |= RX_FLAG_TSFT;
600
601 return true;
602
603 rx_next:
604 return false;
605 }
606
607 void ath9k_rx_tasklet(unsigned long data)
608 {
609 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data;
610 struct ath9k_htc_rxbuf *rxbuf = NULL, *tmp_buf = NULL;
611 struct ieee80211_rx_status rx_status;
612 struct sk_buff *skb;
613 unsigned long flags;
614 struct ieee80211_hdr *hdr;
615
616 do {
617 spin_lock_irqsave(&priv->rx.rxbuflock, flags);
618 list_for_each_entry(tmp_buf, &priv->rx.rxbuf, list) {
619 if (tmp_buf->in_process) {
620 rxbuf = tmp_buf;
621 break;
622 }
623 }
624
625 if (rxbuf == NULL) {
626 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags);
627 break;
628 }
629
630 if (!rxbuf->skb)
631 goto requeue;
632
633 if (!ath9k_rx_prepare(priv, rxbuf, &rx_status)) {
634 dev_kfree_skb_any(rxbuf->skb);
635 goto requeue;
636 }
637
638 memcpy(IEEE80211_SKB_RXCB(rxbuf->skb), &rx_status,
639 sizeof(struct ieee80211_rx_status));
640 skb = rxbuf->skb;
641 hdr = (struct ieee80211_hdr *) skb->data;
642
643 if (ieee80211_is_beacon(hdr->frame_control) && priv->ps_enabled)
644 ieee80211_queue_work(priv->hw, &priv->ps_work);
645
646 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags);
647
648 ieee80211_rx(priv->hw, skb);
649
650 spin_lock_irqsave(&priv->rx.rxbuflock, flags);
651 requeue:
652 rxbuf->in_process = false;
653 rxbuf->skb = NULL;
654 list_move_tail(&rxbuf->list, &priv->rx.rxbuf);
655 rxbuf = NULL;
656 spin_unlock_irqrestore(&priv->rx.rxbuflock, flags);
657 } while (1);
658
659 }
660
661 void ath9k_htc_rxep(void *drv_priv, struct sk_buff *skb,
662 enum htc_endpoint_id ep_id)
663 {
664 struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)drv_priv;
665 struct ath_hw *ah = priv->ah;
666 struct ath_common *common = ath9k_hw_common(ah);
667 struct ath9k_htc_rxbuf *rxbuf = NULL, *tmp_buf = NULL;
668
669 spin_lock(&priv->rx.rxbuflock);
670 list_for_each_entry(tmp_buf, &priv->rx.rxbuf, list) {
671 if (!tmp_buf->in_process) {
672 rxbuf = tmp_buf;
673 break;
674 }
675 }
676 spin_unlock(&priv->rx.rxbuflock);
677
678 if (rxbuf == NULL) {
679 ath_print(common, ATH_DBG_ANY,
680 "No free RX buffer\n");
681 goto err;
682 }
683
684 spin_lock(&priv->rx.rxbuflock);
685 rxbuf->skb = skb;
686 rxbuf->in_process = true;
687 spin_unlock(&priv->rx.rxbuflock);
688
689 tasklet_schedule(&priv->rx_tasklet);
690 return;
691 err:
692 dev_kfree_skb_any(skb);
693 }
694
695
696 void ath9k_rx_cleanup(struct ath9k_htc_priv *priv)
697 {
698 struct ath9k_htc_rxbuf *rxbuf, *tbuf;
699
700 list_for_each_entry_safe(rxbuf, tbuf, &priv->rx.rxbuf, list) {
701 list_del(&rxbuf->list);
702 if (rxbuf->skb)
703 dev_kfree_skb_any(rxbuf->skb);
704 kfree(rxbuf);
705 }
706 }
707
708 int ath9k_rx_init(struct ath9k_htc_priv *priv)
709 {
710 struct ath_hw *ah = priv->ah;
711 struct ath_common *common = ath9k_hw_common(ah);
712 struct ath9k_htc_rxbuf *rxbuf;
713 int i = 0;
714
715 INIT_LIST_HEAD(&priv->rx.rxbuf);
716 spin_lock_init(&priv->rx.rxbuflock);
717
718 for (i = 0; i < ATH9K_HTC_RXBUF; i++) {
719 rxbuf = kzalloc(sizeof(struct ath9k_htc_rxbuf), GFP_KERNEL);
720 if (rxbuf == NULL) {
721 ath_print(common, ATH_DBG_FATAL,
722 "Unable to allocate RX buffers\n");
723 goto err;
724 }
725 list_add_tail(&rxbuf->list, &priv->rx.rxbuf);
726 }
727
728 return 0;
729
730 err:
731 ath9k_rx_cleanup(priv);
732 return -ENOMEM;
733 }
Tomato firmware and modifications.