1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /* Copyright(c) 2018-2019  Realtek Corporation
3  */
4 
5 #include "main.h"
6 #include "tx.h"
7 #include "fw.h"
8 #include "ps.h"
9 #include "debug.h"
10 
11 static
12 void rtw_tx_stats(struct rtw_dev *rtwdev, struct ieee80211_vif *vif,
13 		  struct sk_buff *skb)
14 {
15 	struct ieee80211_hdr *hdr;
16 	struct rtw_vif *rtwvif;
17 
18 	hdr = (struct ieee80211_hdr *)skb->data;
19 
20 	if (!ieee80211_is_data(hdr->frame_control))
21 		return;
22 
23 	if (!is_broadcast_ether_addr(hdr->addr1) &&
24 	    !is_multicast_ether_addr(hdr->addr1)) {
25 		rtwdev->stats.tx_unicast += skb->len;
26 		rtwdev->stats.tx_cnt++;
27 		if (vif) {
28 			rtwvif = (struct rtw_vif *)vif->drv_priv;
29 			rtwvif->stats.tx_unicast += skb->len;
30 			rtwvif->stats.tx_cnt++;
31 		}
32 	}
33 }
34 
35 void rtw_tx_fill_tx_desc(struct rtw_tx_pkt_info *pkt_info, struct sk_buff *skb)
36 {
37 	__le32 *txdesc = (__le32 *)skb->data;
38 
39 	SET_TX_DESC_TXPKTSIZE(txdesc,  pkt_info->tx_pkt_size);
40 	SET_TX_DESC_OFFSET(txdesc, pkt_info->offset);
41 	SET_TX_DESC_PKT_OFFSET(txdesc, pkt_info->pkt_offset);
42 	SET_TX_DESC_QSEL(txdesc, pkt_info->qsel);
43 	SET_TX_DESC_BMC(txdesc, pkt_info->bmc);
44 	SET_TX_DESC_RATE_ID(txdesc, pkt_info->rate_id);
45 	SET_TX_DESC_DATARATE(txdesc, pkt_info->rate);
46 	SET_TX_DESC_DISDATAFB(txdesc, pkt_info->dis_rate_fallback);
47 	SET_TX_DESC_USE_RATE(txdesc, pkt_info->use_rate);
48 	SET_TX_DESC_SEC_TYPE(txdesc, pkt_info->sec_type);
49 	SET_TX_DESC_DATA_BW(txdesc, pkt_info->bw);
50 	SET_TX_DESC_SW_SEQ(txdesc, pkt_info->seq);
51 	SET_TX_DESC_MAX_AGG_NUM(txdesc, pkt_info->ampdu_factor);
52 	SET_TX_DESC_AMPDU_DENSITY(txdesc, pkt_info->ampdu_density);
53 	SET_TX_DESC_DATA_STBC(txdesc, pkt_info->stbc);
54 	SET_TX_DESC_DATA_LDPC(txdesc, pkt_info->ldpc);
55 	SET_TX_DESC_AGG_EN(txdesc, pkt_info->ampdu_en);
56 	SET_TX_DESC_LS(txdesc, pkt_info->ls);
57 	SET_TX_DESC_DATA_SHORT(txdesc, pkt_info->short_gi);
58 	SET_TX_DESC_SPE_RPT(txdesc, pkt_info->report);
59 	SET_TX_DESC_SW_DEFINE(txdesc, pkt_info->sn);
60 	SET_TX_DESC_USE_RTS(txdesc, pkt_info->rts);
61 	if (pkt_info->rts) {
62 		SET_TX_DESC_RTSRATE(txdesc, DESC_RATE24M);
63 		SET_TX_DESC_DATA_RTS_SHORT(txdesc, 1);
64 	}
65 	SET_TX_DESC_DISQSELSEQ(txdesc, pkt_info->dis_qselseq);
66 	SET_TX_DESC_EN_HWSEQ(txdesc, pkt_info->en_hwseq);
67 	SET_TX_DESC_HW_SSN_SEL(txdesc, pkt_info->hw_ssn_sel);
68 	SET_TX_DESC_NAVUSEHDR(txdesc, pkt_info->nav_use_hdr);
69 	SET_TX_DESC_BT_NULL(txdesc, pkt_info->bt_null);
70 	if (pkt_info->tim_offset) {
71 		SET_TX_DESC_TIM_EN(txdesc, 1);
72 		SET_TX_DESC_TIM_OFFSET(txdesc, pkt_info->tim_offset);
73 	}
74 }
75 EXPORT_SYMBOL(rtw_tx_fill_tx_desc);
76 
77 static u8 get_tx_ampdu_factor(struct ieee80211_sta *sta)
78 {
79 	u8 exp = sta->deflink.ht_cap.ampdu_factor;
80 
81 	/* the least ampdu factor is 8K, and the value in the tx desc is the
82 	 * max aggregation num, which represents val * 2 packets can be
83 	 * aggregated in an AMPDU, so here we should use 8/2=4 as the base
84 	 */
85 	return (BIT(2) << exp) - 1;
86 }
87 
88 static u8 get_tx_ampdu_density(struct ieee80211_sta *sta)
89 {
90 	return sta->deflink.ht_cap.ampdu_density;
91 }
92 
93 static u8 get_highest_ht_tx_rate(struct rtw_dev *rtwdev,
94 				 struct ieee80211_sta *sta)
95 {
96 	u8 rate;
97 
98 	if (rtwdev->hal.rf_type == RF_2T2R && sta->deflink.ht_cap.mcs.rx_mask[1] != 0)
99 		rate = DESC_RATEMCS15;
100 	else
101 		rate = DESC_RATEMCS7;
102 
103 	return rate;
104 }
105 
106 static u8 get_highest_vht_tx_rate(struct rtw_dev *rtwdev,
107 				  struct ieee80211_sta *sta)
108 {
109 	struct rtw_efuse *efuse = &rtwdev->efuse;
110 	u8 rate;
111 	u16 tx_mcs_map;
112 
113 	tx_mcs_map = le16_to_cpu(sta->deflink.vht_cap.vht_mcs.tx_mcs_map);
114 	if (efuse->hw_cap.nss == 1) {
115 		switch (tx_mcs_map & 0x3) {
116 		case IEEE80211_VHT_MCS_SUPPORT_0_7:
117 			rate = DESC_RATEVHT1SS_MCS7;
118 			break;
119 		case IEEE80211_VHT_MCS_SUPPORT_0_8:
120 			rate = DESC_RATEVHT1SS_MCS8;
121 			break;
122 		default:
123 		case IEEE80211_VHT_MCS_SUPPORT_0_9:
124 			rate = DESC_RATEVHT1SS_MCS9;
125 			break;
126 		}
127 	} else if (efuse->hw_cap.nss >= 2) {
128 		switch ((tx_mcs_map & 0xc) >> 2) {
129 		case IEEE80211_VHT_MCS_SUPPORT_0_7:
130 			rate = DESC_RATEVHT2SS_MCS7;
131 			break;
132 		case IEEE80211_VHT_MCS_SUPPORT_0_8:
133 			rate = DESC_RATEVHT2SS_MCS8;
134 			break;
135 		default:
136 		case IEEE80211_VHT_MCS_SUPPORT_0_9:
137 			rate = DESC_RATEVHT2SS_MCS9;
138 			break;
139 		}
140 	} else {
141 		rate = DESC_RATEVHT1SS_MCS9;
142 	}
143 
144 	return rate;
145 }
146 
147 static void rtw_tx_report_enable(struct rtw_dev *rtwdev,
148 				 struct rtw_tx_pkt_info *pkt_info)
149 {
150 	struct rtw_tx_report *tx_report = &rtwdev->tx_report;
151 
152 	/* [11:8], reserved, fills with zero
153 	 * [7:2],  tx report sequence number
154 	 * [1:0],  firmware use, fills with zero
155 	 */
156 	pkt_info->sn = (atomic_inc_return(&tx_report->sn) << 2) & 0xfc;
157 	pkt_info->report = true;
158 }
159 
160 void rtw_tx_report_purge_timer(struct timer_list *t)
161 {
162 	struct rtw_dev *rtwdev = from_timer(rtwdev, t, tx_report.purge_timer);
163 	struct rtw_tx_report *tx_report = &rtwdev->tx_report;
164 	unsigned long flags;
165 
166 	if (skb_queue_len(&tx_report->queue) == 0)
167 		return;
168 
169 	rtw_warn(rtwdev, "failed to get tx report from firmware\n");
170 
171 	spin_lock_irqsave(&tx_report->q_lock, flags);
172 	skb_queue_purge(&tx_report->queue);
173 	spin_unlock_irqrestore(&tx_report->q_lock, flags);
174 }
175 
176 void rtw_tx_report_enqueue(struct rtw_dev *rtwdev, struct sk_buff *skb, u8 sn)
177 {
178 	struct rtw_tx_report *tx_report = &rtwdev->tx_report;
179 	unsigned long flags;
180 	u8 *drv_data;
181 
182 	/* pass sn to tx report handler through driver data */
183 	drv_data = (u8 *)IEEE80211_SKB_CB(skb)->status.status_driver_data;
184 	*drv_data = sn;
185 
186 	spin_lock_irqsave(&tx_report->q_lock, flags);
187 	__skb_queue_tail(&tx_report->queue, skb);
188 	spin_unlock_irqrestore(&tx_report->q_lock, flags);
189 
190 	mod_timer(&tx_report->purge_timer, jiffies + RTW_TX_PROBE_TIMEOUT);
191 }
192 EXPORT_SYMBOL(rtw_tx_report_enqueue);
193 
194 static void rtw_tx_report_tx_status(struct rtw_dev *rtwdev,
195 				    struct sk_buff *skb, bool acked)
196 {
197 	struct ieee80211_tx_info *info;
198 
199 	info = IEEE80211_SKB_CB(skb);
200 	ieee80211_tx_info_clear_status(info);
201 	if (acked)
202 		info->flags |= IEEE80211_TX_STAT_ACK;
203 	else
204 		info->flags &= ~IEEE80211_TX_STAT_ACK;
205 
206 	ieee80211_tx_status_irqsafe(rtwdev->hw, skb);
207 }
208 
209 void rtw_tx_report_handle(struct rtw_dev *rtwdev, struct sk_buff *skb, int src)
210 {
211 	struct rtw_tx_report *tx_report = &rtwdev->tx_report;
212 	struct rtw_c2h_cmd *c2h;
213 	struct sk_buff *cur, *tmp;
214 	unsigned long flags;
215 	u8 sn, st;
216 	u8 *n;
217 
218 	c2h = get_c2h_from_skb(skb);
219 
220 	if (src == C2H_CCX_TX_RPT) {
221 		sn = GET_CCX_REPORT_SEQNUM_V0(c2h->payload);
222 		st = GET_CCX_REPORT_STATUS_V0(c2h->payload);
223 	} else {
224 		sn = GET_CCX_REPORT_SEQNUM_V1(c2h->payload);
225 		st = GET_CCX_REPORT_STATUS_V1(c2h->payload);
226 	}
227 
228 	spin_lock_irqsave(&tx_report->q_lock, flags);
229 	skb_queue_walk_safe(&tx_report->queue, cur, tmp) {
230 		n = (u8 *)IEEE80211_SKB_CB(cur)->status.status_driver_data;
231 		if (*n == sn) {
232 			__skb_unlink(cur, &tx_report->queue);
233 			rtw_tx_report_tx_status(rtwdev, cur, st == 0);
234 			break;
235 		}
236 	}
237 	spin_unlock_irqrestore(&tx_report->q_lock, flags);
238 }
239 
240 static u8 rtw_get_mgmt_rate(struct rtw_dev *rtwdev, struct sk_buff *skb,
241 			    u8 lowest_rate, bool ignore_rate)
242 {
243 	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
244 	struct ieee80211_vif *vif = tx_info->control.vif;
245 	bool force_lowest = test_bit(RTW_FLAG_FORCE_LOWEST_RATE, rtwdev->flags);
246 
247 	if (!vif || !vif->bss_conf.basic_rates || ignore_rate || force_lowest)
248 		return lowest_rate;
249 
250 	return __ffs(vif->bss_conf.basic_rates) + lowest_rate;
251 }
252 
253 static void rtw_tx_pkt_info_update_rate(struct rtw_dev *rtwdev,
254 					struct rtw_tx_pkt_info *pkt_info,
255 					struct sk_buff *skb,
256 					bool ignore_rate)
257 {
258 	if (rtwdev->hal.current_band_type == RTW_BAND_2G) {
259 		pkt_info->rate_id = RTW_RATEID_B_20M;
260 		pkt_info->rate = rtw_get_mgmt_rate(rtwdev, skb, DESC_RATE1M,
261 						   ignore_rate);
262 	} else {
263 		pkt_info->rate_id = RTW_RATEID_G;
264 		pkt_info->rate = rtw_get_mgmt_rate(rtwdev, skb, DESC_RATE6M,
265 						   ignore_rate);
266 	}
267 
268 	pkt_info->use_rate = true;
269 	pkt_info->dis_rate_fallback = true;
270 }
271 
272 static void rtw_tx_pkt_info_update_sec(struct rtw_dev *rtwdev,
273 				       struct rtw_tx_pkt_info *pkt_info,
274 				       struct sk_buff *skb)
275 {
276 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
277 	u8 sec_type = 0;
278 
279 	if (info && info->control.hw_key) {
280 		struct ieee80211_key_conf *key = info->control.hw_key;
281 
282 		switch (key->cipher) {
283 		case WLAN_CIPHER_SUITE_WEP40:
284 		case WLAN_CIPHER_SUITE_WEP104:
285 		case WLAN_CIPHER_SUITE_TKIP:
286 			sec_type = 0x01;
287 			break;
288 		case WLAN_CIPHER_SUITE_CCMP:
289 			sec_type = 0x03;
290 			break;
291 		default:
292 			break;
293 		}
294 	}
295 
296 	pkt_info->sec_type = sec_type;
297 }
298 
299 static void rtw_tx_mgmt_pkt_info_update(struct rtw_dev *rtwdev,
300 					struct rtw_tx_pkt_info *pkt_info,
301 					struct ieee80211_sta *sta,
302 					struct sk_buff *skb)
303 {
304 	rtw_tx_pkt_info_update_rate(rtwdev, pkt_info, skb, false);
305 	pkt_info->dis_qselseq = true;
306 	pkt_info->en_hwseq = true;
307 	pkt_info->hw_ssn_sel = 0;
308 	/* TODO: need to change hw port and hw ssn sel for multiple vifs */
309 }
310 
311 static void rtw_tx_data_pkt_info_update(struct rtw_dev *rtwdev,
312 					struct rtw_tx_pkt_info *pkt_info,
313 					struct ieee80211_sta *sta,
314 					struct sk_buff *skb)
315 {
316 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
317 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
318 	struct ieee80211_hw *hw = rtwdev->hw;
319 	struct rtw_dm_info *dm_info = &rtwdev->dm_info;
320 	struct rtw_sta_info *si;
321 	u8 fix_rate;
322 	u16 seq;
323 	u8 ampdu_factor = 0;
324 	u8 ampdu_density = 0;
325 	bool ampdu_en = false;
326 	u8 rate = DESC_RATE6M;
327 	u8 rate_id = 6;
328 	u8 bw = RTW_CHANNEL_WIDTH_20;
329 	bool stbc = false;
330 	bool ldpc = false;
331 
332 	seq = (le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ) >> 4;
333 
334 	/* for broadcast/multicast, use default values */
335 	if (!sta)
336 		goto out;
337 
338 	if (info->flags & IEEE80211_TX_CTL_AMPDU) {
339 		ampdu_en = true;
340 		ampdu_factor = get_tx_ampdu_factor(sta);
341 		ampdu_density = get_tx_ampdu_density(sta);
342 	}
343 
344 	if (info->control.use_rts || skb->len > hw->wiphy->rts_threshold)
345 		pkt_info->rts = true;
346 
347 	if (sta->deflink.vht_cap.vht_supported)
348 		rate = get_highest_vht_tx_rate(rtwdev, sta);
349 	else if (sta->deflink.ht_cap.ht_supported)
350 		rate = get_highest_ht_tx_rate(rtwdev, sta);
351 	else if (sta->deflink.supp_rates[0] <= 0xf)
352 		rate = DESC_RATE11M;
353 	else
354 		rate = DESC_RATE54M;
355 
356 	si = (struct rtw_sta_info *)sta->drv_priv;
357 
358 	bw = si->bw_mode;
359 	rate_id = si->rate_id;
360 	stbc = rtwdev->hal.txrx_1ss ? false : si->stbc_en;
361 	ldpc = si->ldpc_en;
362 
363 out:
364 	pkt_info->seq = seq;
365 	pkt_info->ampdu_factor = ampdu_factor;
366 	pkt_info->ampdu_density = ampdu_density;
367 	pkt_info->ampdu_en = ampdu_en;
368 	pkt_info->rate = rate;
369 	pkt_info->rate_id = rate_id;
370 	pkt_info->bw = bw;
371 	pkt_info->stbc = stbc;
372 	pkt_info->ldpc = ldpc;
373 
374 	fix_rate = dm_info->fix_rate;
375 	if (fix_rate < DESC_RATE_MAX) {
376 		pkt_info->rate = fix_rate;
377 		pkt_info->dis_rate_fallback = true;
378 		pkt_info->use_rate = true;
379 	}
380 }
381 
382 void rtw_tx_pkt_info_update(struct rtw_dev *rtwdev,
383 			    struct rtw_tx_pkt_info *pkt_info,
384 			    struct ieee80211_sta *sta,
385 			    struct sk_buff *skb)
386 {
387 	struct rtw_chip_info *chip = rtwdev->chip;
388 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
389 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
390 	struct rtw_sta_info *si;
391 	struct ieee80211_vif *vif = NULL;
392 	__le16 fc = hdr->frame_control;
393 	bool bmc;
394 
395 	if (sta) {
396 		si = (struct rtw_sta_info *)sta->drv_priv;
397 		vif = si->vif;
398 	}
399 
400 	if (ieee80211_is_mgmt(fc) || ieee80211_is_nullfunc(fc))
401 		rtw_tx_mgmt_pkt_info_update(rtwdev, pkt_info, sta, skb);
402 	else if (ieee80211_is_data(fc))
403 		rtw_tx_data_pkt_info_update(rtwdev, pkt_info, sta, skb);
404 
405 	bmc = is_broadcast_ether_addr(hdr->addr1) ||
406 	      is_multicast_ether_addr(hdr->addr1);
407 
408 	if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
409 		rtw_tx_report_enable(rtwdev, pkt_info);
410 
411 	pkt_info->bmc = bmc;
412 	rtw_tx_pkt_info_update_sec(rtwdev, pkt_info, skb);
413 	pkt_info->tx_pkt_size = skb->len;
414 	pkt_info->offset = chip->tx_pkt_desc_sz;
415 	pkt_info->qsel = skb->priority;
416 	pkt_info->ls = true;
417 
418 	/* maybe merge with tx status ? */
419 	rtw_tx_stats(rtwdev, vif, skb);
420 }
421 
422 void rtw_tx_rsvd_page_pkt_info_update(struct rtw_dev *rtwdev,
423 				      struct rtw_tx_pkt_info *pkt_info,
424 				      struct sk_buff *skb,
425 				      enum rtw_rsvd_packet_type type)
426 {
427 	struct rtw_chip_info *chip = rtwdev->chip;
428 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
429 	bool bmc;
430 
431 	/* A beacon or dummy reserved page packet indicates that it is the first
432 	 * reserved page, and the qsel of it will be set in each hci.
433 	 */
434 	if (type != RSVD_BEACON && type != RSVD_DUMMY)
435 		pkt_info->qsel = TX_DESC_QSEL_MGMT;
436 
437 	rtw_tx_pkt_info_update_rate(rtwdev, pkt_info, skb, true);
438 
439 	bmc = is_broadcast_ether_addr(hdr->addr1) ||
440 	      is_multicast_ether_addr(hdr->addr1);
441 	pkt_info->bmc = bmc;
442 	pkt_info->tx_pkt_size = skb->len;
443 	pkt_info->offset = chip->tx_pkt_desc_sz;
444 	pkt_info->ls = true;
445 	if (type == RSVD_PS_POLL) {
446 		pkt_info->nav_use_hdr = true;
447 	} else {
448 		pkt_info->dis_qselseq = true;
449 		pkt_info->en_hwseq = true;
450 		pkt_info->hw_ssn_sel = 0;
451 	}
452 	if (type == RSVD_QOS_NULL)
453 		pkt_info->bt_null = true;
454 
455 	if (type == RSVD_BEACON) {
456 		struct rtw_rsvd_page *rsvd_pkt;
457 		int hdr_len;
458 
459 		rsvd_pkt = list_first_entry_or_null(&rtwdev->rsvd_page_list,
460 						    struct rtw_rsvd_page,
461 						    build_list);
462 		if (rsvd_pkt && rsvd_pkt->tim_offset != 0) {
463 			hdr_len = sizeof(struct ieee80211_hdr_3addr);
464 			pkt_info->tim_offset = rsvd_pkt->tim_offset - hdr_len;
465 		}
466 	}
467 
468 	rtw_tx_pkt_info_update_sec(rtwdev, pkt_info, skb);
469 
470 	/* TODO: need to change hw port and hw ssn sel for multiple vifs */
471 }
472 
473 struct sk_buff *
474 rtw_tx_write_data_rsvd_page_get(struct rtw_dev *rtwdev,
475 				struct rtw_tx_pkt_info *pkt_info,
476 				u8 *buf, u32 size)
477 {
478 	struct rtw_chip_info *chip = rtwdev->chip;
479 	struct sk_buff *skb;
480 	u32 tx_pkt_desc_sz;
481 	u32 length;
482 
483 	tx_pkt_desc_sz = chip->tx_pkt_desc_sz;
484 	length = size + tx_pkt_desc_sz;
485 	skb = dev_alloc_skb(length);
486 	if (!skb) {
487 		rtw_err(rtwdev, "failed to alloc write data rsvd page skb\n");
488 		return NULL;
489 	}
490 
491 	skb_reserve(skb, tx_pkt_desc_sz);
492 	skb_put_data(skb, buf, size);
493 	rtw_tx_rsvd_page_pkt_info_update(rtwdev, pkt_info, skb, RSVD_BEACON);
494 
495 	return skb;
496 }
497 EXPORT_SYMBOL(rtw_tx_write_data_rsvd_page_get);
498 
499 struct sk_buff *
500 rtw_tx_write_data_h2c_get(struct rtw_dev *rtwdev,
501 			  struct rtw_tx_pkt_info *pkt_info,
502 			  u8 *buf, u32 size)
503 {
504 	struct rtw_chip_info *chip = rtwdev->chip;
505 	struct sk_buff *skb;
506 	u32 tx_pkt_desc_sz;
507 	u32 length;
508 
509 	tx_pkt_desc_sz = chip->tx_pkt_desc_sz;
510 	length = size + tx_pkt_desc_sz;
511 	skb = dev_alloc_skb(length);
512 	if (!skb) {
513 		rtw_err(rtwdev, "failed to alloc write data h2c skb\n");
514 		return NULL;
515 	}
516 
517 	skb_reserve(skb, tx_pkt_desc_sz);
518 	skb_put_data(skb, buf, size);
519 	pkt_info->tx_pkt_size = size;
520 
521 	return skb;
522 }
523 EXPORT_SYMBOL(rtw_tx_write_data_h2c_get);
524 
525 void rtw_tx(struct rtw_dev *rtwdev,
526 	    struct ieee80211_tx_control *control,
527 	    struct sk_buff *skb)
528 {
529 	struct rtw_tx_pkt_info pkt_info = {0};
530 	int ret;
531 
532 	rtw_tx_pkt_info_update(rtwdev, &pkt_info, control->sta, skb);
533 	ret = rtw_hci_tx_write(rtwdev, &pkt_info, skb);
534 	if (ret) {
535 		rtw_err(rtwdev, "failed to write TX skb to HCI\n");
536 		goto out;
537 	}
538 
539 	rtw_hci_tx_kick_off(rtwdev);
540 
541 	return;
542 
543 out:
544 	ieee80211_free_txskb(rtwdev->hw, skb);
545 }
546 
547 static void rtw_txq_check_agg(struct rtw_dev *rtwdev,
548 			      struct rtw_txq *rtwtxq,
549 			      struct sk_buff *skb)
550 {
551 	struct ieee80211_txq *txq = rtwtxq_to_txq(rtwtxq);
552 	struct ieee80211_tx_info *info;
553 	struct rtw_sta_info *si;
554 
555 	if (test_bit(RTW_TXQ_AMPDU, &rtwtxq->flags)) {
556 		info = IEEE80211_SKB_CB(skb);
557 		info->flags |= IEEE80211_TX_CTL_AMPDU;
558 		return;
559 	}
560 
561 	if (skb_get_queue_mapping(skb) == IEEE80211_AC_VO)
562 		return;
563 
564 	if (test_bit(RTW_TXQ_BLOCK_BA, &rtwtxq->flags))
565 		return;
566 
567 	if (unlikely(skb->protocol == cpu_to_be16(ETH_P_PAE)))
568 		return;
569 
570 	if (!txq->sta)
571 		return;
572 
573 	si = (struct rtw_sta_info *)txq->sta->drv_priv;
574 	set_bit(txq->tid, si->tid_ba);
575 
576 	ieee80211_queue_work(rtwdev->hw, &rtwdev->ba_work);
577 }
578 
579 static int rtw_txq_push_skb(struct rtw_dev *rtwdev,
580 			    struct rtw_txq *rtwtxq,
581 			    struct sk_buff *skb)
582 {
583 	struct ieee80211_txq *txq = rtwtxq_to_txq(rtwtxq);
584 	struct rtw_tx_pkt_info pkt_info = {0};
585 	int ret;
586 
587 	rtw_txq_check_agg(rtwdev, rtwtxq, skb);
588 
589 	rtw_tx_pkt_info_update(rtwdev, &pkt_info, txq->sta, skb);
590 	ret = rtw_hci_tx_write(rtwdev, &pkt_info, skb);
591 	if (ret) {
592 		rtw_err(rtwdev, "failed to write TX skb to HCI\n");
593 		return ret;
594 	}
595 	rtwtxq->last_push = jiffies;
596 
597 	return 0;
598 }
599 
600 static struct sk_buff *rtw_txq_dequeue(struct rtw_dev *rtwdev,
601 				       struct rtw_txq *rtwtxq)
602 {
603 	struct ieee80211_txq *txq = rtwtxq_to_txq(rtwtxq);
604 	struct sk_buff *skb;
605 
606 	skb = ieee80211_tx_dequeue(rtwdev->hw, txq);
607 	if (!skb)
608 		return NULL;
609 
610 	return skb;
611 }
612 
613 static void rtw_txq_push(struct rtw_dev *rtwdev,
614 			 struct rtw_txq *rtwtxq,
615 			 unsigned long frames)
616 {
617 	struct sk_buff *skb;
618 	int ret;
619 	int i;
620 
621 	rcu_read_lock();
622 
623 	for (i = 0; i < frames; i++) {
624 		skb = rtw_txq_dequeue(rtwdev, rtwtxq);
625 		if (!skb)
626 			break;
627 
628 		ret = rtw_txq_push_skb(rtwdev, rtwtxq, skb);
629 		if (ret) {
630 			rtw_err(rtwdev, "failed to pusk skb, ret %d\n", ret);
631 			break;
632 		}
633 	}
634 
635 	rcu_read_unlock();
636 }
637 
638 void rtw_tx_work(struct work_struct *w)
639 {
640 	struct rtw_dev *rtwdev = container_of(w, struct rtw_dev, tx_work);
641 	struct rtw_txq *rtwtxq, *tmp;
642 
643 	spin_lock_bh(&rtwdev->txq_lock);
644 
645 	list_for_each_entry_safe(rtwtxq, tmp, &rtwdev->txqs, list) {
646 		struct ieee80211_txq *txq = rtwtxq_to_txq(rtwtxq);
647 		unsigned long frame_cnt;
648 		unsigned long byte_cnt;
649 
650 		ieee80211_txq_get_depth(txq, &frame_cnt, &byte_cnt);
651 		rtw_txq_push(rtwdev, rtwtxq, frame_cnt);
652 
653 		list_del_init(&rtwtxq->list);
654 	}
655 
656 	rtw_hci_tx_kick_off(rtwdev);
657 
658 	spin_unlock_bh(&rtwdev->txq_lock);
659 }
660 
661 void rtw_txq_init(struct rtw_dev *rtwdev, struct ieee80211_txq *txq)
662 {
663 	struct rtw_txq *rtwtxq;
664 
665 	if (!txq)
666 		return;
667 
668 	rtwtxq = (struct rtw_txq *)txq->drv_priv;
669 	INIT_LIST_HEAD(&rtwtxq->list);
670 }
671 
672 void rtw_txq_cleanup(struct rtw_dev *rtwdev, struct ieee80211_txq *txq)
673 {
674 	struct rtw_txq *rtwtxq;
675 
676 	if (!txq)
677 		return;
678 
679 	rtwtxq = (struct rtw_txq *)txq->drv_priv;
680 	spin_lock_bh(&rtwdev->txq_lock);
681 	if (!list_empty(&rtwtxq->list))
682 		list_del_init(&rtwtxq->list);
683 	spin_unlock_bh(&rtwdev->txq_lock);
684 }
685