1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3  * Copyright (C) 2012-2014, 2018-2024 Intel Corporation
4  * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
5  * Copyright (C) 2016-2017 Intel Deutschland GmbH
6  */
7 #include <linux/ieee80211.h>
8 #include <linux/etherdevice.h>
9 #include <linux/tcp.h>
10 #include <net/gso.h>
11 #include <net/ip.h>
12 #include <net/ipv6.h>
13 
14 #include "iwl-trans.h"
15 #include "iwl-eeprom-parse.h"
16 #include "mvm.h"
17 #include "sta.h"
18 #include "time-sync.h"
19 
20 static void
21 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
22 			  u16 tid, u16 ssn)
23 {
24 	struct iwl_fw_dbg_trigger_tlv *trig;
25 	struct iwl_fw_dbg_trigger_ba *ba_trig;
26 
27 	trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA);
28 	if (!trig)
29 		return;
30 
31 	ba_trig = (void *)trig->data;
32 
33 	if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
34 		return;
35 
36 	iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
37 				"BAR sent to %pM, tid %d, ssn %d",
38 				addr, tid, ssn);
39 }
40 
41 #define OPT_HDR(type, skb, off) \
42 	(type *)(skb_network_header(skb) + (off))
43 
44 static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
45 			   struct ieee80211_tx_info *info,
46 			   bool amsdu)
47 {
48 	struct ieee80211_hdr *hdr = (void *)skb->data;
49 	u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
50 	u16 offload_assist = 0;
51 #if IS_ENABLED(CONFIG_INET)
52 	u8 protocol = 0;
53 
54 	/* Do not compute checksum if already computed */
55 	if (skb->ip_summed != CHECKSUM_PARTIAL)
56 		goto out;
57 
58 	/* We do not expect to be requested to csum stuff we do not support */
59 	if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
60 		      (skb->protocol != htons(ETH_P_IP) &&
61 		       skb->protocol != htons(ETH_P_IPV6)),
62 		      "No support for requested checksum\n")) {
63 		skb_checksum_help(skb);
64 		goto out;
65 	}
66 
67 	if (skb->protocol == htons(ETH_P_IP)) {
68 		protocol = ip_hdr(skb)->protocol;
69 	} else {
70 #if IS_ENABLED(CONFIG_IPV6)
71 		struct ipv6hdr *ipv6h =
72 			(struct ipv6hdr *)skb_network_header(skb);
73 		unsigned int off = sizeof(*ipv6h);
74 
75 		protocol = ipv6h->nexthdr;
76 		while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
77 			struct ipv6_opt_hdr *hp;
78 
79 			/* only supported extension headers */
80 			if (protocol != NEXTHDR_ROUTING &&
81 			    protocol != NEXTHDR_HOP &&
82 			    protocol != NEXTHDR_DEST) {
83 				skb_checksum_help(skb);
84 				goto out;
85 			}
86 
87 			hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
88 			protocol = hp->nexthdr;
89 			off += ipv6_optlen(hp);
90 		}
91 		/* if we get here - protocol now should be TCP/UDP */
92 #endif
93 	}
94 
95 	if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
96 		WARN_ON_ONCE(1);
97 		skb_checksum_help(skb);
98 		goto out;
99 	}
100 
101 	/* enable L4 csum */
102 	offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);
103 
104 	/*
105 	 * Set offset to IP header (snap).
106 	 * We don't support tunneling so no need to take care of inner header.
107 	 * Size is in words.
108 	 */
109 	offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);
110 
111 	/* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
112 	if (skb->protocol == htons(ETH_P_IP) && amsdu) {
113 		ip_hdr(skb)->check = 0;
114 		offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
115 	}
116 
117 	/* reset UDP/TCP header csum */
118 	if (protocol == IPPROTO_TCP)
119 		tcp_hdr(skb)->check = 0;
120 	else
121 		udp_hdr(skb)->check = 0;
122 
123 out:
124 #endif
125 	/*
126 	 * mac header len should include IV, size is in words unless
127 	 * the IV is added by the firmware like in WEP.
128 	 * In new Tx API, the IV is always added by the firmware.
129 	 */
130 	if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key &&
131 	    info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 &&
132 	    info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104)
133 		mh_len += info->control.hw_key->iv_len;
134 	mh_len /= 2;
135 	offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
136 
137 	if (amsdu)
138 		offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
139 	else if (ieee80211_hdrlen(hdr->frame_control) % 4)
140 		/* padding is inserted later in transport */
141 		offload_assist |= BIT(TX_CMD_OFFLD_PAD);
142 
143 	return offload_assist;
144 }
145 
146 /*
147  * Sets most of the Tx cmd's fields
148  */
149 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
150 			struct iwl_tx_cmd *tx_cmd,
151 			struct ieee80211_tx_info *info, u8 sta_id)
152 {
153 	struct ieee80211_hdr *hdr = (void *)skb->data;
154 	__le16 fc = hdr->frame_control;
155 	u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
156 	u32 len = skb->len + FCS_LEN;
157 	bool amsdu = false;
158 	u8 ac;
159 
160 	if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) ||
161 	    (ieee80211_is_probe_resp(fc) &&
162 	     !is_multicast_ether_addr(hdr->addr1)))
163 		tx_flags |= TX_CMD_FLG_ACK;
164 	else
165 		tx_flags &= ~TX_CMD_FLG_ACK;
166 
167 	if (ieee80211_is_probe_resp(fc))
168 		tx_flags |= TX_CMD_FLG_TSF;
169 
170 	if (ieee80211_has_morefrags(fc))
171 		tx_flags |= TX_CMD_FLG_MORE_FRAG;
172 
173 	if (ieee80211_is_data_qos(fc)) {
174 		u8 *qc = ieee80211_get_qos_ctl(hdr);
175 		tx_cmd->tid_tspec = qc[0] & 0xf;
176 		tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
177 		amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
178 	} else if (ieee80211_is_back_req(fc)) {
179 		struct ieee80211_bar *bar = (void *)skb->data;
180 		u16 control = le16_to_cpu(bar->control);
181 		u16 ssn = le16_to_cpu(bar->start_seq_num);
182 
183 		tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
184 		tx_cmd->tid_tspec = (control &
185 				     IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
186 			IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
187 		WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
188 		iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
189 					  ssn);
190 	} else {
191 		if (ieee80211_is_data(fc))
192 			tx_cmd->tid_tspec = IWL_TID_NON_QOS;
193 		else
194 			tx_cmd->tid_tspec = IWL_MAX_TID_COUNT;
195 
196 		if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
197 			tx_flags |= TX_CMD_FLG_SEQ_CTL;
198 		else
199 			tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
200 	}
201 
202 	/* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */
203 	if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
204 		ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
205 	else
206 		ac = tid_to_mac80211_ac[0];
207 
208 	tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
209 			TX_CMD_FLG_BT_PRIO_POS;
210 
211 	if (ieee80211_is_mgmt(fc)) {
212 		if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
213 			tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
214 		else if (ieee80211_is_action(fc))
215 			tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
216 		else
217 			tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
218 
219 		/* The spec allows Action frames in A-MPDU, we don't support
220 		 * it
221 		 */
222 		WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
223 	} else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
224 		tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
225 	} else {
226 		tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
227 	}
228 
229 	if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
230 	    !is_multicast_ether_addr(hdr->addr1))
231 		tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
232 
233 	if (fw_has_capa(&mvm->fw->ucode_capa,
234 			IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
235 	    ieee80211_action_contains_tpc(skb))
236 		tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
237 
238 	tx_cmd->tx_flags = cpu_to_le32(tx_flags);
239 	/* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
240 	tx_cmd->len = cpu_to_le16((u16)skb->len);
241 	tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
242 	tx_cmd->sta_id = sta_id;
243 
244 	tx_cmd->offload_assist =
245 		cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, info, amsdu));
246 }
247 
248 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm,
249 			      struct ieee80211_tx_info *info,
250 			      struct ieee80211_sta *sta, __le16 fc)
251 {
252 	if (info->band == NL80211_BAND_2GHZ &&
253 	    !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
254 		return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
255 
256 	if (sta && ieee80211_is_data(fc)) {
257 		struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
258 
259 		return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS;
260 	}
261 
262 	return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
263 }
264 
265 static u32 iwl_mvm_get_inject_tx_rate(struct iwl_mvm *mvm,
266 				      struct ieee80211_tx_info *info)
267 {
268 	struct ieee80211_tx_rate *rate = &info->control.rates[0];
269 	u32 result;
270 
271 	/*
272 	 * we only care about legacy/HT/VHT so far, so we can
273 	 * build in v1 and use iwl_new_rate_from_v1()
274 	 */
275 
276 	if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
277 		u8 mcs = ieee80211_rate_get_vht_mcs(rate);
278 		u8 nss = ieee80211_rate_get_vht_nss(rate);
279 
280 		result = RATE_MCS_VHT_MSK_V1;
281 		result |= u32_encode_bits(mcs, RATE_VHT_MCS_RATE_CODE_MSK);
282 		result |= u32_encode_bits(nss, RATE_MCS_NSS_MSK);
283 		if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
284 			result |= RATE_MCS_SGI_MSK_V1;
285 		if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
286 			result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1);
287 		else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
288 			result |= u32_encode_bits(2, RATE_MCS_CHAN_WIDTH_MSK_V1);
289 		else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
290 			result |= u32_encode_bits(3, RATE_MCS_CHAN_WIDTH_MSK_V1);
291 	} else if (rate->flags & IEEE80211_TX_RC_MCS) {
292 		result = RATE_MCS_HT_MSK_V1;
293 		result |= u32_encode_bits(rate->idx,
294 					  RATE_HT_MCS_RATE_CODE_MSK_V1 |
295 					  RATE_HT_MCS_NSS_MSK_V1);
296 		if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
297 			result |= RATE_MCS_SGI_MSK_V1;
298 		if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
299 			result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1);
300 		if (info->flags & IEEE80211_TX_CTL_LDPC)
301 			result |= RATE_MCS_LDPC_MSK_V1;
302 		if (u32_get_bits(info->flags, IEEE80211_TX_CTL_STBC))
303 			result |= RATE_MCS_STBC_MSK;
304 	} else {
305 		return 0;
306 	}
307 
308 	if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 6)
309 		return iwl_new_rate_from_v1(result);
310 	return result;
311 }
312 
313 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
314 			       struct ieee80211_tx_info *info,
315 			       struct ieee80211_sta *sta, __le16 fc)
316 {
317 	int rate_idx = -1;
318 	u8 rate_plcp;
319 	u32 rate_flags = 0;
320 	bool is_cck;
321 
322 	if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) {
323 		u32 result = iwl_mvm_get_inject_tx_rate(mvm, info);
324 
325 		if (result)
326 			return result;
327 		rate_idx = info->control.rates[0].idx;
328 	} else if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) {
329 		/* info->control is only relevant for non HW rate control */
330 
331 		/* HT rate doesn't make sense for a non data frame */
332 		WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS &&
333 			  !ieee80211_is_data(fc),
334 			  "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n",
335 			  info->control.rates[0].flags,
336 			  info->control.rates[0].idx,
337 			  le16_to_cpu(fc),
338 			  sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1);
339 
340 		rate_idx = info->control.rates[0].idx;
341 
342 		/* For non 2 GHZ band, remap mac80211 rate indices into driver
343 		 * indices.
344 		 */
345 		if (info->band != NL80211_BAND_2GHZ ||
346 		    (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE))
347 			rate_idx += IWL_FIRST_OFDM_RATE;
348 
349 		/* For 2.4 GHZ band, check that there is no need to remap */
350 		BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
351 	}
352 
353 	/* if the rate isn't a well known legacy rate, take the lowest one */
354 	if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
355 		rate_idx = iwl_mvm_mac_ctxt_get_lowest_rate(mvm,
356 							    info,
357 							    info->control.vif);
358 
359 	/* Get PLCP rate for tx_cmd->rate_n_flags */
360 	rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx);
361 	is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE);
362 
363 	/* Set CCK or OFDM flag */
364 	if (iwl_fw_lookup_cmd_ver(mvm->fw, TX_CMD, 0) > 8) {
365 		if (!is_cck)
366 			rate_flags |= RATE_MCS_LEGACY_OFDM_MSK;
367 		else
368 			rate_flags |= RATE_MCS_CCK_MSK;
369 	} else if (is_cck) {
370 		rate_flags |= RATE_MCS_CCK_MSK_V1;
371 	}
372 
373 	return (u32)rate_plcp | rate_flags;
374 }
375 
376 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm,
377 				       struct ieee80211_tx_info *info,
378 				       struct ieee80211_sta *sta, __le16 fc)
379 {
380 	return iwl_mvm_get_tx_rate(mvm, info, sta, fc) |
381 		iwl_mvm_get_tx_ant(mvm, info, sta, fc);
382 }
383 
384 /*
385  * Sets the fields in the Tx cmd that are rate related
386  */
387 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
388 			    struct ieee80211_tx_info *info,
389 			    struct ieee80211_sta *sta, __le16 fc)
390 {
391 	/* Set retry limit on RTS packets */
392 	tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
393 
394 	/* Set retry limit on DATA packets and Probe Responses*/
395 	if (ieee80211_is_probe_resp(fc)) {
396 		tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
397 		tx_cmd->rts_retry_limit =
398 			min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
399 	} else if (ieee80211_is_back_req(fc)) {
400 		tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
401 	} else {
402 		tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
403 	}
404 
405 	/*
406 	 * for data packets, rate info comes from the table inside the fw. This
407 	 * table is controlled by LINK_QUALITY commands
408 	 */
409 
410 	if (likely(ieee80211_is_data(fc) && sta &&
411 		   !(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))) {
412 		struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
413 
414 		if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) {
415 			tx_cmd->initial_rate_index = 0;
416 			tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
417 			return;
418 		}
419 	} else if (ieee80211_is_back_req(fc)) {
420 		tx_cmd->tx_flags |=
421 			cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
422 	}
423 
424 	/* Set the rate in the TX cmd */
425 	tx_cmd->rate_n_flags =
426 		cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc));
427 }
428 
429 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
430 					 u8 *crypto_hdr)
431 {
432 	struct ieee80211_key_conf *keyconf = info->control.hw_key;
433 	u64 pn;
434 
435 	pn = atomic64_inc_return(&keyconf->tx_pn);
436 	crypto_hdr[0] = pn;
437 	crypto_hdr[2] = 0;
438 	crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
439 	crypto_hdr[1] = pn >> 8;
440 	crypto_hdr[4] = pn >> 16;
441 	crypto_hdr[5] = pn >> 24;
442 	crypto_hdr[6] = pn >> 32;
443 	crypto_hdr[7] = pn >> 40;
444 }
445 
446 /*
447  * Sets the fields in the Tx cmd that are crypto related
448  */
449 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
450 				      struct ieee80211_tx_info *info,
451 				      struct iwl_tx_cmd *tx_cmd,
452 				      struct sk_buff *skb_frag,
453 				      int hdrlen)
454 {
455 	struct ieee80211_key_conf *keyconf = info->control.hw_key;
456 	u8 *crypto_hdr = skb_frag->data + hdrlen;
457 	enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM;
458 	u64 pn;
459 
460 	switch (keyconf->cipher) {
461 	case WLAN_CIPHER_SUITE_CCMP:
462 		iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
463 		iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
464 		break;
465 
466 	case WLAN_CIPHER_SUITE_TKIP:
467 		tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
468 		pn = atomic64_inc_return(&keyconf->tx_pn);
469 		ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
470 		ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
471 		break;
472 
473 	case WLAN_CIPHER_SUITE_WEP104:
474 		tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
475 		fallthrough;
476 	case WLAN_CIPHER_SUITE_WEP40:
477 		tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
478 			((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
479 			  TX_CMD_SEC_WEP_KEY_IDX_MSK);
480 
481 		memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
482 		break;
483 	case WLAN_CIPHER_SUITE_GCMP:
484 	case WLAN_CIPHER_SUITE_GCMP_256:
485 		type = TX_CMD_SEC_GCMP;
486 		fallthrough;
487 	case WLAN_CIPHER_SUITE_CCMP_256:
488 		/* TODO: Taking the key from the table might introduce a race
489 		 * when PTK rekeying is done, having an old packets with a PN
490 		 * based on the old key but the message encrypted with a new
491 		 * one.
492 		 * Need to handle this.
493 		 */
494 		tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE;
495 		tx_cmd->key[0] = keyconf->hw_key_idx;
496 		iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
497 		break;
498 	default:
499 		tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
500 	}
501 }
502 
503 static void iwl_mvm_copy_hdr(void *cmd, const void *hdr, int hdrlen,
504 			     const u8 *addr3_override)
505 {
506 	struct ieee80211_hdr *out_hdr = cmd;
507 
508 	memcpy(cmd, hdr, hdrlen);
509 	if (addr3_override)
510 		memcpy(out_hdr->addr3, addr3_override, ETH_ALEN);
511 }
512 
513 /*
514  * Allocates and sets the Tx cmd the driver data pointers in the skb
515  */
516 static struct iwl_device_tx_cmd *
517 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
518 		      struct ieee80211_tx_info *info, int hdrlen,
519 		      struct ieee80211_sta *sta, u8 sta_id,
520 		      const u8 *addr3_override)
521 {
522 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
523 	struct iwl_device_tx_cmd *dev_cmd;
524 	struct iwl_tx_cmd *tx_cmd;
525 
526 	dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
527 
528 	if (unlikely(!dev_cmd))
529 		return NULL;
530 
531 	dev_cmd->hdr.cmd = TX_CMD;
532 
533 	if (iwl_mvm_has_new_tx_api(mvm)) {
534 		u32 rate_n_flags = 0;
535 		u16 flags = 0;
536 		struct iwl_mvm_sta *mvmsta = sta ?
537 			iwl_mvm_sta_from_mac80211(sta) : NULL;
538 		bool amsdu = false;
539 
540 		if (ieee80211_is_data_qos(hdr->frame_control)) {
541 			u8 *qc = ieee80211_get_qos_ctl(hdr);
542 
543 			amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
544 		}
545 
546 		if (!info->control.hw_key)
547 			flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
548 
549 		/*
550 		 * For data and mgmt packets rate info comes from the fw. Only
551 		 * set rate/antenna for injected frames with fixed rate, or
552 		 * when no sta is given.
553 		 */
554 		if (unlikely(!sta ||
555 			     info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) {
556 			flags |= IWL_TX_FLAGS_CMD_RATE;
557 			rate_n_flags =
558 				iwl_mvm_get_tx_rate_n_flags(mvm, info, sta,
559 							    hdr->frame_control);
560 		} else if (!ieee80211_is_data(hdr->frame_control) ||
561 			   mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
562 			/* These are important frames */
563 			flags |= IWL_TX_FLAGS_HIGH_PRI;
564 		}
565 
566 		if (mvm->trans->trans_cfg->device_family >=
567 		    IWL_DEVICE_FAMILY_AX210) {
568 			struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload;
569 			u32 offload_assist = iwl_mvm_tx_csum(mvm, skb,
570 							     info, amsdu);
571 
572 			cmd->offload_assist = cpu_to_le32(offload_assist);
573 
574 			/* Total # bytes to be transmitted */
575 			cmd->len = cpu_to_le16((u16)skb->len);
576 
577 			/* Copy MAC header from skb into command buffer */
578 			iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override);
579 
580 			cmd->flags = cpu_to_le16(flags);
581 			cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
582 		} else {
583 			struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
584 			u16 offload_assist = iwl_mvm_tx_csum(mvm, skb,
585 							     info, amsdu);
586 
587 			cmd->offload_assist = cpu_to_le16(offload_assist);
588 
589 			/* Total # bytes to be transmitted */
590 			cmd->len = cpu_to_le16((u16)skb->len);
591 
592 			/* Copy MAC header from skb into command buffer */
593 			iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override);
594 
595 			cmd->flags = cpu_to_le32(flags);
596 			cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
597 		}
598 		goto out;
599 	}
600 
601 	tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
602 
603 	if (info->control.hw_key)
604 		iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
605 
606 	iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
607 
608 	iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
609 
610 	/* Copy MAC header from skb into command buffer */
611 	iwl_mvm_copy_hdr(tx_cmd->hdr, hdr, hdrlen, addr3_override);
612 
613 out:
614 	return dev_cmd;
615 }
616 
617 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
618 				       struct iwl_device_tx_cmd *cmd)
619 {
620 	struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
621 
622 	memset(&skb_info->status, 0, sizeof(skb_info->status));
623 	memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
624 
625 	skb_info->driver_data[1] = cmd;
626 }
627 
628 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
629 				      struct iwl_mvm_vif_link_info *link,
630 				      struct ieee80211_tx_info *info,
631 				      struct sk_buff *skb)
632 {
633 	struct ieee80211_hdr *hdr = (void *)skb->data;
634 	__le16 fc = hdr->frame_control;
635 
636 	switch (info->control.vif->type) {
637 	case NL80211_IFTYPE_AP:
638 	case NL80211_IFTYPE_ADHOC:
639 		/*
640 		 * Non-bufferable frames use the broadcast station, thus they
641 		 * use the probe queue.
642 		 * Also take care of the case where we send a deauth to a
643 		 * station that we don't have, or similarly an association
644 		 * response (with non-success status) for a station we can't
645 		 * accept.
646 		 * Also, disassociate frames might happen, particular with
647 		 * reason 7 ("Class 3 frame received from nonassociated STA").
648 		 */
649 		if (ieee80211_is_mgmt(fc) &&
650 		    (!ieee80211_is_bufferable_mmpdu(skb) ||
651 		     ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
652 			return link->mgmt_queue;
653 
654 		if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
655 		    is_multicast_ether_addr(hdr->addr1))
656 			return link->cab_queue;
657 
658 		WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
659 			  "fc=0x%02x", le16_to_cpu(fc));
660 		return link->mgmt_queue;
661 	case NL80211_IFTYPE_P2P_DEVICE:
662 		if (ieee80211_is_mgmt(fc))
663 			return mvm->p2p_dev_queue;
664 
665 		WARN_ON_ONCE(1);
666 		return mvm->p2p_dev_queue;
667 	default:
668 		WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
669 		return -1;
670 	}
671 }
672 
673 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
674 				       struct sk_buff *skb)
675 {
676 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
677 	struct iwl_mvm_vif *mvmvif =
678 		iwl_mvm_vif_from_mac80211(info->control.vif);
679 	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
680 	int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
681 	struct iwl_probe_resp_data *resp_data;
682 	const u8 *ie;
683 	u8 *pos;
684 	u8 match[] = {
685 		(WLAN_OUI_WFA >> 16) & 0xff,
686 		(WLAN_OUI_WFA >> 8) & 0xff,
687 		WLAN_OUI_WFA & 0xff,
688 		WLAN_OUI_TYPE_WFA_P2P,
689 	};
690 
691 	rcu_read_lock();
692 
693 	resp_data = rcu_dereference(mvmvif->deflink.probe_resp_data);
694 	if (!resp_data)
695 		goto out;
696 
697 	if (!resp_data->notif.noa_active)
698 		goto out;
699 
700 	ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
701 				    mgmt->u.probe_resp.variable,
702 				    skb->len - base_len,
703 				    match, 4, 2);
704 	if (!ie) {
705 		IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
706 		goto out;
707 	}
708 
709 	if (skb_tailroom(skb) < resp_data->noa_len) {
710 		if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
711 			IWL_ERR(mvm,
712 				"Failed to reallocate probe resp\n");
713 			goto out;
714 		}
715 	}
716 
717 	pos = skb_put(skb, resp_data->noa_len);
718 
719 	*pos++ = WLAN_EID_VENDOR_SPECIFIC;
720 	/* Set length of IE body (not including ID and length itself) */
721 	*pos++ = resp_data->noa_len - 2;
722 	*pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
723 	*pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
724 	*pos++ = WLAN_OUI_WFA & 0xff;
725 	*pos++ = WLAN_OUI_TYPE_WFA_P2P;
726 
727 	memcpy(pos, &resp_data->notif.noa_attr,
728 	       resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
729 
730 out:
731 	rcu_read_unlock();
732 }
733 
734 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
735 {
736 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
737 	struct ieee80211_tx_info info;
738 	struct iwl_device_tx_cmd *dev_cmd;
739 	u8 sta_id;
740 	int hdrlen = ieee80211_hdrlen(hdr->frame_control);
741 	__le16 fc = hdr->frame_control;
742 	bool offchannel = IEEE80211_SKB_CB(skb)->flags &
743 		IEEE80211_TX_CTL_TX_OFFCHAN;
744 	int queue = -1;
745 
746 	if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
747 		return -1;
748 
749 	memcpy(&info, skb->cb, sizeof(info));
750 
751 	if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen))
752 		return -1;
753 
754 	if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
755 		return -1;
756 
757 	if (info.control.vif) {
758 		struct iwl_mvm_vif *mvmvif =
759 			iwl_mvm_vif_from_mac80211(info.control.vif);
760 
761 		if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
762 		    info.control.vif->type == NL80211_IFTYPE_AP ||
763 		    info.control.vif->type == NL80211_IFTYPE_ADHOC) {
764 			u32 link_id = u32_get_bits(info.control.flags,
765 						   IEEE80211_TX_CTRL_MLO_LINK);
766 			struct iwl_mvm_vif_link_info *link;
767 
768 			if (link_id == IEEE80211_LINK_UNSPECIFIED) {
769 				if (info.control.vif->active_links)
770 					link_id = ffs(info.control.vif->active_links) - 1;
771 				else
772 					link_id = 0;
773 			}
774 
775 			link = mvmvif->link[link_id];
776 			if (WARN_ON(!link))
777 				return -1;
778 
779 			if (!ieee80211_is_data(hdr->frame_control))
780 				sta_id = link->bcast_sta.sta_id;
781 			else
782 				sta_id = link->mcast_sta.sta_id;
783 
784 			queue = iwl_mvm_get_ctrl_vif_queue(mvm, link, &info,
785 							   skb);
786 		} else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
787 			queue = mvm->snif_queue;
788 			sta_id = mvm->snif_sta.sta_id;
789 		} else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
790 			   offchannel) {
791 			/*
792 			 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
793 			 * that can be used in 2 different types of vifs, P2P &
794 			 * STATION.
795 			 * P2P uses the offchannel queue.
796 			 * STATION (HS2.0) uses the auxiliary context of the FW,
797 			 * and hence needs to be sent on the aux queue.
798 			 */
799 			sta_id = mvm->aux_sta.sta_id;
800 			queue = mvm->aux_queue;
801 		}
802 	}
803 
804 	if (queue < 0) {
805 		IWL_ERR(mvm, "No queue was found. Dropping TX\n");
806 		return -1;
807 	}
808 
809 	if (unlikely(ieee80211_is_probe_resp(fc)))
810 		iwl_mvm_probe_resp_set_noa(mvm, skb);
811 
812 	IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
813 
814 	dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id,
815 					NULL);
816 	if (!dev_cmd)
817 		return -1;
818 
819 	/* From now on, we cannot access info->control */
820 	iwl_mvm_skb_prepare_status(skb, dev_cmd);
821 
822 	if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
823 		iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
824 		return -1;
825 	}
826 
827 	return 0;
828 }
829 
830 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
831 				    struct ieee80211_sta *sta, unsigned int tid)
832 {
833 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
834 	u8 ac = tid_to_mac80211_ac[tid];
835 	enum nl80211_band band;
836 	unsigned int txf;
837 	unsigned int val;
838 	int lmac;
839 
840 	/* For HE redirect to trigger based fifos */
841 	if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
842 		ac += 4;
843 
844 	txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
845 
846 	/*
847 	 * Don't send an AMSDU that will be longer than the TXF.
848 	 * Add a security margin of 256 for the TX command + headers.
849 	 * We also want to have the start of the next packet inside the
850 	 * fifo to be able to send bursts.
851 	 */
852 	val = mvmsta->max_amsdu_len;
853 
854 	if (hweight16(sta->valid_links) <= 1) {
855 		if (sta->valid_links) {
856 			struct ieee80211_bss_conf *link_conf;
857 			unsigned int link = ffs(sta->valid_links) - 1;
858 
859 			rcu_read_lock();
860 			link_conf = rcu_dereference(mvmsta->vif->link_conf[link]);
861 			if (WARN_ON(!link_conf))
862 				band = NL80211_BAND_2GHZ;
863 			else
864 				band = link_conf->chandef.chan->band;
865 			rcu_read_unlock();
866 		} else {
867 			band = mvmsta->vif->bss_conf.chandef.chan->band;
868 		}
869 
870 		lmac = iwl_mvm_get_lmac_id(mvm, band);
871 	} else if (fw_has_capa(&mvm->fw->ucode_capa,
872 			       IWL_UCODE_TLV_CAPA_CDB_SUPPORT)) {
873 		/* for real MLO restrict to both LMACs if they exist */
874 		lmac = IWL_LMAC_5G_INDEX;
875 		val = min_t(unsigned int, val,
876 			    mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
877 		lmac = IWL_LMAC_24G_INDEX;
878 	} else {
879 		lmac = IWL_LMAC_24G_INDEX;
880 	}
881 
882 	return min_t(unsigned int, val,
883 		     mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
884 }
885 
886 #ifdef CONFIG_INET
887 
888 static int
889 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
890 		       netdev_features_t netdev_flags,
891 		       struct sk_buff_head *mpdus_skb)
892 {
893 	struct sk_buff *tmp, *next;
894 	struct ieee80211_hdr *hdr = (void *)skb->data;
895 	char cb[sizeof(skb->cb)];
896 	u16 i = 0;
897 	unsigned int tcp_payload_len;
898 	unsigned int mss = skb_shinfo(skb)->gso_size;
899 	bool ipv4 = (skb->protocol == htons(ETH_P_IP));
900 	bool qos = ieee80211_is_data_qos(hdr->frame_control);
901 	u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
902 
903 	skb_shinfo(skb)->gso_size = num_subframes * mss;
904 	memcpy(cb, skb->cb, sizeof(cb));
905 
906 	next = skb_gso_segment(skb, netdev_flags);
907 	skb_shinfo(skb)->gso_size = mss;
908 	skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
909 	if (WARN_ON_ONCE(IS_ERR(next)))
910 		return -EINVAL;
911 	else if (next)
912 		consume_skb(skb);
913 
914 	skb_list_walk_safe(next, tmp, next) {
915 		memcpy(tmp->cb, cb, sizeof(tmp->cb));
916 		/*
917 		 * Compute the length of all the data added for the A-MSDU.
918 		 * This will be used to compute the length to write in the TX
919 		 * command. We have: SNAP + IP + TCP for n -1 subframes and
920 		 * ETH header for n subframes.
921 		 */
922 		tcp_payload_len = skb_tail_pointer(tmp) -
923 			skb_transport_header(tmp) -
924 			tcp_hdrlen(tmp) + tmp->data_len;
925 
926 		if (ipv4)
927 			ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
928 
929 		if (tcp_payload_len > mss) {
930 			skb_shinfo(tmp)->gso_size = mss;
931 			skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 :
932 							   SKB_GSO_TCPV6;
933 		} else {
934 			if (qos) {
935 				u8 *qc;
936 
937 				if (ipv4)
938 					ip_send_check(ip_hdr(tmp));
939 
940 				qc = ieee80211_get_qos_ctl((void *)tmp->data);
941 				*qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
942 			}
943 			skb_shinfo(tmp)->gso_size = 0;
944 		}
945 
946 		skb_mark_not_on_list(tmp);
947 		__skb_queue_tail(mpdus_skb, tmp);
948 		i++;
949 	}
950 
951 	return 0;
952 }
953 
954 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
955 			  struct ieee80211_tx_info *info,
956 			  struct ieee80211_sta *sta,
957 			  struct sk_buff_head *mpdus_skb)
958 {
959 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
960 	struct ieee80211_hdr *hdr = (void *)skb->data;
961 	unsigned int mss = skb_shinfo(skb)->gso_size;
962 	unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
963 	u16 snap_ip_tcp, pad;
964 	netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
965 	u8 tid;
966 
967 	snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
968 		tcp_hdrlen(skb);
969 
970 	if (!mvmsta->max_amsdu_len ||
971 	    !ieee80211_is_data_qos(hdr->frame_control) ||
972 	    !mvmsta->amsdu_enabled)
973 		return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
974 
975 	/*
976 	 * Do not build AMSDU for IPv6 with extension headers.
977 	 * ask stack to segment and checkum the generated MPDUs for us.
978 	 */
979 	if (skb->protocol == htons(ETH_P_IPV6) &&
980 	    ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
981 	    IPPROTO_TCP) {
982 		netdev_flags &= ~NETIF_F_CSUM_MASK;
983 		return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
984 	}
985 
986 	tid = ieee80211_get_tid(hdr);
987 	if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
988 		return -EINVAL;
989 
990 	/*
991 	 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
992 	 * during an BA session.
993 	 */
994 	if ((info->flags & IEEE80211_TX_CTL_AMPDU &&
995 	     !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) ||
996 	    !(mvmsta->amsdu_enabled & BIT(tid)))
997 		return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
998 
999 	/*
1000 	 * Take the min of ieee80211 station and mvm station
1001 	 */
1002 	max_amsdu_len =
1003 		min_t(unsigned int, sta->cur->max_amsdu_len,
1004 		      iwl_mvm_max_amsdu_size(mvm, sta, tid));
1005 
1006 	/*
1007 	 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
1008 	 * supported. This is a spec requirement (IEEE 802.11-2015
1009 	 * section 8.7.3 NOTE 3).
1010 	 */
1011 	if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1012 	    !sta->deflink.vht_cap.vht_supported)
1013 		max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
1014 
1015 	/* Sub frame header + SNAP + IP header + TCP header + MSS */
1016 	subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
1017 	pad = (4 - subf_len) & 0x3;
1018 
1019 	/*
1020 	 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
1021 	 * N * subf_len + (N - 1) * pad.
1022 	 */
1023 	num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
1024 
1025 	if (sta->max_amsdu_subframes &&
1026 	    num_subframes > sta->max_amsdu_subframes)
1027 		num_subframes = sta->max_amsdu_subframes;
1028 
1029 	tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1030 		tcp_hdrlen(skb) + skb->data_len;
1031 
1032 	/*
1033 	 * Make sure we have enough TBs for the A-MSDU:
1034 	 *	2 for each subframe
1035 	 *	1 more for each fragment
1036 	 *	1 more for the potential data in the header
1037 	 */
1038 	if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
1039 	    mvm->trans->max_skb_frags)
1040 		num_subframes = 1;
1041 
1042 	if (num_subframes > 1)
1043 		*ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1044 
1045 	/* This skb fits in one single A-MSDU */
1046 	if (num_subframes * mss >= tcp_payload_len) {
1047 		__skb_queue_tail(mpdus_skb, skb);
1048 		return 0;
1049 	}
1050 
1051 	/*
1052 	 * Trick the segmentation function to make it
1053 	 * create SKBs that can fit into one A-MSDU.
1054 	 */
1055 	return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags,
1056 				      mpdus_skb);
1057 }
1058 #else /* CONFIG_INET */
1059 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
1060 			  struct ieee80211_tx_info *info,
1061 			  struct ieee80211_sta *sta,
1062 			  struct sk_buff_head *mpdus_skb)
1063 {
1064 	/* Impossible to get TSO with CONFIG_INET */
1065 	WARN_ON(1);
1066 
1067 	return -1;
1068 }
1069 #endif
1070 
1071 /* Check if there are any timed-out TIDs on a given shared TXQ */
1072 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
1073 {
1074 	unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
1075 	unsigned long now = jiffies;
1076 	int tid;
1077 
1078 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1079 		return false;
1080 
1081 	for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1082 		if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
1083 				IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1084 			return true;
1085 	}
1086 
1087 	return false;
1088 }
1089 
1090 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
1091 			       struct iwl_mvm_sta *mvmsta,
1092 			       int airtime)
1093 {
1094 	int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1095 	struct iwl_mvm_tcm_mac *mdata;
1096 
1097 	if (mac >= NUM_MAC_INDEX_DRIVER)
1098 		return;
1099 
1100 	mdata = &mvm->tcm.data[mac];
1101 
1102 	if (mvm->tcm.paused)
1103 		return;
1104 
1105 	if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1106 		schedule_delayed_work(&mvm->tcm.work, 0);
1107 
1108 	mdata->tx.airtime += airtime;
1109 }
1110 
1111 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
1112 				 struct iwl_mvm_sta *mvmsta, int tid)
1113 {
1114 	u32 ac = tid_to_mac80211_ac[tid];
1115 	int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1116 	struct iwl_mvm_tcm_mac *mdata;
1117 
1118 	if (mac >= NUM_MAC_INDEX_DRIVER)
1119 		return -EINVAL;
1120 
1121 	mdata = &mvm->tcm.data[mac];
1122 
1123 	mdata->tx.pkts[ac]++;
1124 
1125 	return 0;
1126 }
1127 
1128 /*
1129  * Sets the fields in the Tx cmd that are crypto related.
1130  *
1131  * This function must be called with BHs disabled.
1132  */
1133 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
1134 			   struct ieee80211_tx_info *info,
1135 			   struct ieee80211_sta *sta,
1136 			   const u8 *addr3_override)
1137 {
1138 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1139 	struct iwl_mvm_sta *mvmsta;
1140 	struct iwl_device_tx_cmd *dev_cmd;
1141 	__le16 fc;
1142 	u16 seq_number = 0;
1143 	u8 tid = IWL_MAX_TID_COUNT;
1144 	u16 txq_id;
1145 	bool is_ampdu = false;
1146 	int hdrlen;
1147 
1148 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
1149 	fc = hdr->frame_control;
1150 	hdrlen = ieee80211_hdrlen(fc);
1151 
1152 	if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
1153 		return -1;
1154 
1155 	if (WARN_ON_ONCE(!mvmsta))
1156 		return -1;
1157 
1158 	if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA))
1159 		return -1;
1160 
1161 	if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he)
1162 		return -1;
1163 
1164 	if (unlikely(ieee80211_is_probe_resp(fc)))
1165 		iwl_mvm_probe_resp_set_noa(mvm, skb);
1166 
1167 	dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1168 					sta, mvmsta->deflink.sta_id,
1169 					addr3_override);
1170 	if (!dev_cmd)
1171 		goto drop;
1172 
1173 	/*
1174 	 * we handle that entirely ourselves -- for uAPSD the firmware
1175 	 * will always send a notification, and for PS-Poll responses
1176 	 * we'll notify mac80211 when getting frame status
1177 	 */
1178 	info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1179 
1180 	spin_lock(&mvmsta->lock);
1181 
1182 	/* nullfunc frames should go to the MGMT queue regardless of QOS,
1183 	 * the conditions of !ieee80211_is_qos_nullfunc(fc) and
1184 	 * !ieee80211_is_data_qos(fc) keep the default assignment of MGMT TID
1185 	 */
1186 	if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1187 		tid = ieee80211_get_tid(hdr);
1188 		if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid))
1189 			goto drop_unlock_sta;
1190 
1191 		is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1192 		if (WARN_ONCE(is_ampdu &&
1193 			      mvmsta->tid_data[tid].state != IWL_AGG_ON,
1194 			      "Invalid internal agg state %d for TID %d",
1195 			       mvmsta->tid_data[tid].state, tid))
1196 			goto drop_unlock_sta;
1197 
1198 		seq_number = mvmsta->tid_data[tid].seq_number;
1199 		seq_number &= IEEE80211_SCTL_SEQ;
1200 
1201 		if (!iwl_mvm_has_new_tx_api(mvm)) {
1202 			struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1203 
1204 			hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1205 			hdr->seq_ctrl |= cpu_to_le16(seq_number);
1206 			/* update the tx_cmd hdr as it was already copied */
1207 			tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1208 		}
1209 	} else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc) &&
1210 		   !ieee80211_is_nullfunc(fc)) {
1211 		tid = IWL_TID_NON_QOS;
1212 	}
1213 
1214 	txq_id = mvmsta->tid_data[tid].txq_id;
1215 
1216 	WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1217 
1218 	if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) {
1219 		iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1220 		spin_unlock(&mvmsta->lock);
1221 		return -1;
1222 	}
1223 
1224 	if (!iwl_mvm_has_new_tx_api(mvm)) {
1225 		/* Keep track of the time of the last frame for this RA/TID */
1226 		mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1227 
1228 		/*
1229 		 * If we have timed-out TIDs - schedule the worker that will
1230 		 * reconfig the queues and update them
1231 		 *
1232 		 * Note that the no lock is taken here in order to not serialize
1233 		 * the TX flow. This isn't dangerous because scheduling
1234 		 * mvm->add_stream_wk can't ruin the state, and if we DON'T
1235 		 * schedule it due to some race condition then next TX we get
1236 		 * here we will.
1237 		 */
1238 		if (unlikely(mvm->queue_info[txq_id].status ==
1239 			     IWL_MVM_QUEUE_SHARED &&
1240 			     iwl_mvm_txq_should_update(mvm, txq_id)))
1241 			schedule_work(&mvm->add_stream_wk);
1242 	}
1243 
1244 	IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n",
1245 		     mvmsta->deflink.sta_id, tid, txq_id,
1246 		     IEEE80211_SEQ_TO_SN(seq_number), skb->len);
1247 
1248 	/* From now on, we cannot access info->control */
1249 	iwl_mvm_skb_prepare_status(skb, dev_cmd);
1250 
1251 	/*
1252 	 * The IV is introduced by the HW for new tx api, and it is not present
1253 	 * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the
1254 	 * IV for those devices.
1255 	 */
1256 	if (ieee80211_is_data(fc))
1257 		iwl_mvm_mei_tx_copy_to_csme(mvm, skb,
1258 					    info->control.hw_key &&
1259 					    !iwl_mvm_has_new_tx_api(mvm) ?
1260 					    info->control.hw_key->iv_len : 0);
1261 
1262 	if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1263 		goto drop_unlock_sta;
1264 
1265 	if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1266 		mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1267 
1268 	spin_unlock(&mvmsta->lock);
1269 
1270 	if (iwl_mvm_tx_pkt_queued(mvm, mvmsta,
1271 				  tid == IWL_MAX_TID_COUNT ? 0 : tid))
1272 		goto drop;
1273 
1274 	return 0;
1275 
1276 drop_unlock_sta:
1277 	iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1278 	spin_unlock(&mvmsta->lock);
1279 drop:
1280 	IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->deflink.sta_id,
1281 		     tid);
1282 	return -1;
1283 }
1284 
1285 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb,
1286 		       struct ieee80211_sta *sta)
1287 {
1288 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1289 	struct ieee80211_tx_info info;
1290 	struct sk_buff_head mpdus_skbs;
1291 	struct ieee80211_vif *vif;
1292 	unsigned int payload_len;
1293 	int ret;
1294 	struct sk_buff *orig_skb = skb;
1295 	const u8 *addr3;
1296 
1297 	if (WARN_ON_ONCE(!mvmsta))
1298 		return -1;
1299 
1300 	if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA))
1301 		return -1;
1302 
1303 	memcpy(&info, skb->cb, sizeof(info));
1304 
1305 	if (!skb_is_gso(skb))
1306 		return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL);
1307 
1308 	payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1309 		tcp_hdrlen(skb) + skb->data_len;
1310 
1311 	if (payload_len <= skb_shinfo(skb)->gso_size)
1312 		return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL);
1313 
1314 	__skb_queue_head_init(&mpdus_skbs);
1315 
1316 	vif = info.control.vif;
1317 	if (!vif)
1318 		return -1;
1319 
1320 	ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1321 	if (ret)
1322 		return ret;
1323 
1324 	WARN_ON(skb_queue_empty(&mpdus_skbs));
1325 
1326 	/*
1327 	 * As described in IEEE sta 802.11-2020, table 9-30 (Address
1328 	 * field contents), A-MSDU address 3 should contain the BSSID
1329 	 * address.
1330 	 * Pass address 3 down to iwl_mvm_tx_mpdu() and further to set it
1331 	 * in the command header. We need to preserve the original
1332 	 * address 3 in the skb header to correctly create all the
1333 	 * A-MSDU subframe headers from it.
1334 	 */
1335 	switch (vif->type) {
1336 	case NL80211_IFTYPE_STATION:
1337 		addr3 = vif->cfg.ap_addr;
1338 		break;
1339 	case NL80211_IFTYPE_AP:
1340 		addr3 = vif->addr;
1341 		break;
1342 	default:
1343 		addr3 = NULL;
1344 		break;
1345 	}
1346 
1347 	while (!skb_queue_empty(&mpdus_skbs)) {
1348 		struct ieee80211_hdr *hdr;
1349 		bool amsdu;
1350 
1351 		skb = __skb_dequeue(&mpdus_skbs);
1352 		hdr = (void *)skb->data;
1353 		amsdu = ieee80211_is_data_qos(hdr->frame_control) &&
1354 			(*ieee80211_get_qos_ctl(hdr) &
1355 			 IEEE80211_QOS_CTL_A_MSDU_PRESENT);
1356 
1357 		ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta,
1358 				      amsdu ? addr3 : NULL);
1359 		if (ret) {
1360 			/* Free skbs created as part of TSO logic that have not yet been dequeued */
1361 			__skb_queue_purge(&mpdus_skbs);
1362 			/* skb here is not necessarily same as skb that entered this method,
1363 			 * so free it explicitly.
1364 			 */
1365 			if (skb == orig_skb)
1366 				ieee80211_free_txskb(mvm->hw, skb);
1367 			else
1368 				kfree_skb(skb);
1369 			/* there was error, but we consumed skb one way or another, so return 0 */
1370 			return 0;
1371 		}
1372 	}
1373 
1374 	return 0;
1375 }
1376 
1377 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1378 				      struct ieee80211_sta *sta, u8 tid)
1379 {
1380 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1381 	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1382 	struct ieee80211_vif *vif = mvmsta->vif;
1383 	u16 normalized_ssn;
1384 
1385 	lockdep_assert_held(&mvmsta->lock);
1386 
1387 	if ((tid_data->state == IWL_AGG_ON ||
1388 	     tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1389 	    iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1390 		/*
1391 		 * Now that this aggregation or DQA queue is empty tell
1392 		 * mac80211 so it knows we no longer have frames buffered for
1393 		 * the station on this TID (for the TIM bitmap calculation.)
1394 		 */
1395 		ieee80211_sta_set_buffered(sta, tid, false);
1396 	}
1397 
1398 	/*
1399 	 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1400 	 * to align the wrap around of ssn so we compare relevant values.
1401 	 */
1402 	normalized_ssn = tid_data->ssn;
1403 	if (mvm->trans->trans_cfg->gen2)
1404 		normalized_ssn &= 0xff;
1405 
1406 	if (normalized_ssn != tid_data->next_reclaimed)
1407 		return;
1408 
1409 	switch (tid_data->state) {
1410 	case IWL_EMPTYING_HW_QUEUE_ADDBA:
1411 		IWL_DEBUG_TX_QUEUES(mvm,
1412 				    "Can continue addBA flow ssn = next_recl = %d\n",
1413 				    tid_data->next_reclaimed);
1414 		tid_data->state = IWL_AGG_STARTING;
1415 		ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1416 		break;
1417 
1418 	case IWL_EMPTYING_HW_QUEUE_DELBA:
1419 		IWL_DEBUG_TX_QUEUES(mvm,
1420 				    "Can continue DELBA flow ssn = next_recl = %d\n",
1421 				    tid_data->next_reclaimed);
1422 		tid_data->state = IWL_AGG_OFF;
1423 		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1424 		break;
1425 
1426 	default:
1427 		break;
1428 	}
1429 }
1430 
1431 #ifdef CONFIG_IWLWIFI_DEBUG
1432 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1433 {
1434 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1435 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1436 
1437 	switch (status & TX_STATUS_MSK) {
1438 	case TX_STATUS_SUCCESS:
1439 		return "SUCCESS";
1440 	TX_STATUS_POSTPONE(DELAY);
1441 	TX_STATUS_POSTPONE(FEW_BYTES);
1442 	TX_STATUS_POSTPONE(BT_PRIO);
1443 	TX_STATUS_POSTPONE(QUIET_PERIOD);
1444 	TX_STATUS_POSTPONE(CALC_TTAK);
1445 	TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1446 	TX_STATUS_FAIL(SHORT_LIMIT);
1447 	TX_STATUS_FAIL(LONG_LIMIT);
1448 	TX_STATUS_FAIL(UNDERRUN);
1449 	TX_STATUS_FAIL(DRAIN_FLOW);
1450 	TX_STATUS_FAIL(RFKILL_FLUSH);
1451 	TX_STATUS_FAIL(LIFE_EXPIRE);
1452 	TX_STATUS_FAIL(DEST_PS);
1453 	TX_STATUS_FAIL(HOST_ABORTED);
1454 	TX_STATUS_FAIL(BT_RETRY);
1455 	TX_STATUS_FAIL(STA_INVALID);
1456 	TX_STATUS_FAIL(FRAG_DROPPED);
1457 	TX_STATUS_FAIL(TID_DISABLE);
1458 	TX_STATUS_FAIL(FIFO_FLUSHED);
1459 	TX_STATUS_FAIL(SMALL_CF_POLL);
1460 	TX_STATUS_FAIL(FW_DROP);
1461 	TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1462 	}
1463 
1464 	return "UNKNOWN";
1465 
1466 #undef TX_STATUS_FAIL
1467 #undef TX_STATUS_POSTPONE
1468 }
1469 #endif /* CONFIG_IWLWIFI_DEBUG */
1470 
1471 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width)
1472 {
1473 	switch (chan_width) {
1474 	case RATE_MCS_CHAN_WIDTH_20:
1475 		return 0;
1476 	case RATE_MCS_CHAN_WIDTH_40:
1477 		return IEEE80211_TX_RC_40_MHZ_WIDTH;
1478 	case RATE_MCS_CHAN_WIDTH_80:
1479 		return IEEE80211_TX_RC_80_MHZ_WIDTH;
1480 	case RATE_MCS_CHAN_WIDTH_160:
1481 		return IEEE80211_TX_RC_160_MHZ_WIDTH;
1482 	default:
1483 		return 0;
1484 	}
1485 }
1486 
1487 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1488 			       enum nl80211_band band,
1489 			       struct ieee80211_tx_rate *r)
1490 {
1491 	u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK;
1492 	u32 rate = format == RATE_MCS_HT_MSK ?
1493 		RATE_HT_MCS_INDEX(rate_n_flags) :
1494 		rate_n_flags & RATE_MCS_CODE_MSK;
1495 
1496 	r->flags |=
1497 		iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1498 					      RATE_MCS_CHAN_WIDTH_MSK);
1499 
1500 	if (rate_n_flags & RATE_MCS_SGI_MSK)
1501 		r->flags |= IEEE80211_TX_RC_SHORT_GI;
1502 	if (format ==  RATE_MCS_HT_MSK) {
1503 		r->flags |= IEEE80211_TX_RC_MCS;
1504 		r->idx = rate;
1505 	} else if (format ==  RATE_MCS_VHT_MSK) {
1506 		ieee80211_rate_set_vht(r, rate,
1507 				       FIELD_GET(RATE_MCS_NSS_MSK,
1508 						 rate_n_flags) + 1);
1509 		r->flags |= IEEE80211_TX_RC_VHT_MCS;
1510 	} else if (format == RATE_MCS_HE_MSK) {
1511 		/* mac80211 cannot do this without ieee80211_tx_status_ext()
1512 		 * but it only matters for radiotap */
1513 		r->idx = 0;
1514 	} else {
1515 		r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags,
1516 							       band);
1517 	}
1518 }
1519 
1520 void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags,
1521 				  enum nl80211_band band,
1522 				  struct ieee80211_tx_rate *r)
1523 {
1524 	if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1525 		r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1526 
1527 	r->flags |=
1528 		iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1529 					      RATE_MCS_CHAN_WIDTH_MSK_V1);
1530 
1531 	if (rate_n_flags & RATE_MCS_SGI_MSK_V1)
1532 		r->flags |= IEEE80211_TX_RC_SHORT_GI;
1533 	if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
1534 		r->flags |= IEEE80211_TX_RC_MCS;
1535 		r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1;
1536 	} else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) {
1537 		ieee80211_rate_set_vht(
1538 			r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1539 			FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags) + 1);
1540 		r->flags |= IEEE80211_TX_RC_VHT_MCS;
1541 	} else {
1542 		r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1543 							     band);
1544 	}
1545 }
1546 
1547 /*
1548  * translate ucode response to mac80211 tx status control values
1549  */
1550 static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw,
1551 					u32 rate_n_flags,
1552 					struct ieee80211_tx_info *info)
1553 {
1554 	struct ieee80211_tx_rate *r = &info->status.rates[0];
1555 
1556 	if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP,
1557 				    TX_CMD, 0) <= 6)
1558 		rate_n_flags = iwl_new_rate_from_v1(rate_n_flags);
1559 
1560 	info->status.antenna =
1561 		((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS);
1562 	iwl_mvm_hwrate_to_tx_rate(rate_n_flags,
1563 				  info->band, r);
1564 }
1565 
1566 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1567 					    u32 status, __le16 frame_control)
1568 {
1569 	struct iwl_fw_dbg_trigger_tlv *trig;
1570 	struct iwl_fw_dbg_trigger_tx_status *status_trig;
1571 	int i;
1572 
1573 	if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) {
1574 		enum iwl_fw_ini_time_point tp =
1575 			IWL_FW_INI_TIME_POINT_TX_FAILED;
1576 
1577 		if (ieee80211_is_action(frame_control))
1578 			tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED;
1579 
1580 		iwl_dbg_tlv_time_point(&mvm->fwrt,
1581 				       tp, NULL);
1582 		return;
1583 	}
1584 
1585 	trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
1586 				     FW_DBG_TRIGGER_TX_STATUS);
1587 	if (!trig)
1588 		return;
1589 
1590 	status_trig = (void *)trig->data;
1591 
1592 	for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1593 		/* don't collect on status 0 */
1594 		if (!status_trig->statuses[i].status)
1595 			break;
1596 
1597 		if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1598 			continue;
1599 
1600 		iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1601 					"Tx status %d was received",
1602 					status & TX_STATUS_MSK);
1603 		break;
1604 	}
1605 }
1606 
1607 /*
1608  * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1609  * @tx_resp: the Tx response from the fw (agg or non-agg)
1610  *
1611  * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1612  * it can't know that everything will go well until the end of the AMPDU, it
1613  * can't know in advance the number of MPDUs that will be sent in the current
1614  * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1615  * Hence, it can't know in advance what the SSN of the SCD will be at the end
1616  * of the batch. This is why the SSN of the SCD is written at the end of the
1617  * whole struct at a variable offset. This function knows how to cope with the
1618  * variable offset and returns the SSN of the SCD.
1619  *
1620  * For 22000-series and lower, this is just 12 bits. For later, 16 bits.
1621  */
1622 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1623 				      struct iwl_mvm_tx_resp *tx_resp)
1624 {
1625 	u32 val = le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1626 			       tx_resp->frame_count);
1627 
1628 	if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210)
1629 		return val & 0xFFFF;
1630 	return val & 0xFFF;
1631 }
1632 
1633 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1634 				     struct iwl_rx_packet *pkt)
1635 {
1636 	struct ieee80211_sta *sta;
1637 	u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1638 	int txq_id = SEQ_TO_QUEUE(sequence);
1639 	/* struct iwl_mvm_tx_resp_v3 is almost the same */
1640 	struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1641 	int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1642 	int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1643 	struct agg_tx_status *agg_status =
1644 		iwl_mvm_get_agg_status(mvm, tx_resp);
1645 	u32 status = le16_to_cpu(agg_status->status);
1646 	u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1647 	struct sk_buff_head skbs;
1648 	u8 skb_freed = 0;
1649 	u8 lq_color;
1650 	u16 next_reclaimed, seq_ctl;
1651 	bool is_ndp = false;
1652 
1653 	__skb_queue_head_init(&skbs);
1654 
1655 	if (iwl_mvm_has_new_tx_api(mvm))
1656 		txq_id = le16_to_cpu(tx_resp->tx_queue);
1657 
1658 	seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1659 
1660 	/* we can free until ssn % q.n_bd not inclusive */
1661 	iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs, false);
1662 
1663 	while (!skb_queue_empty(&skbs)) {
1664 		struct sk_buff *skb = __skb_dequeue(&skbs);
1665 		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1666 		struct ieee80211_hdr *hdr = (void *)skb->data;
1667 		bool flushed = false;
1668 
1669 		skb_freed++;
1670 
1671 		iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1672 
1673 		memset(&info->status, 0, sizeof(info->status));
1674 		info->flags &= ~(IEEE80211_TX_STAT_ACK | IEEE80211_TX_STAT_TX_FILTERED);
1675 
1676 		/* inform mac80211 about what happened with the frame */
1677 		switch (status & TX_STATUS_MSK) {
1678 		case TX_STATUS_SUCCESS:
1679 		case TX_STATUS_DIRECT_DONE:
1680 			info->flags |= IEEE80211_TX_STAT_ACK;
1681 			break;
1682 		case TX_STATUS_FAIL_FIFO_FLUSHED:
1683 		case TX_STATUS_FAIL_DRAIN_FLOW:
1684 			flushed = true;
1685 			break;
1686 		case TX_STATUS_FAIL_DEST_PS:
1687 			/* the FW should have stopped the queue and not
1688 			 * return this status
1689 			 */
1690 			IWL_ERR_LIMIT(mvm,
1691 				      "FW reported TX filtered, status=0x%x, FC=0x%x\n",
1692 				      status, le16_to_cpu(hdr->frame_control));
1693 			info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1694 			break;
1695 		default:
1696 			break;
1697 		}
1698 
1699 		if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1700 		    ieee80211_is_mgmt(hdr->frame_control))
1701 			iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
1702 
1703 		/*
1704 		 * If we are freeing multiple frames, mark all the frames
1705 		 * but the first one as acked, since they were acknowledged
1706 		 * before
1707 		 * */
1708 		if (skb_freed > 1)
1709 			info->flags |= IEEE80211_TX_STAT_ACK;
1710 
1711 		iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control);
1712 
1713 		info->status.rates[0].count = tx_resp->failure_frame + 1;
1714 
1715 		iwl_mvm_hwrate_to_tx_status(mvm->fw,
1716 					    le32_to_cpu(tx_resp->initial_rate),
1717 					    info);
1718 
1719 		/* Don't assign the converted initial_rate, because driver
1720 		 * TLC uses this and doesn't support the new FW rate
1721 		 */
1722 		info->status.status_driver_data[1] =
1723 			(void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1724 
1725 		/* Single frame failure in an AMPDU queue => send BAR */
1726 		if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1727 		    !(info->flags & IEEE80211_TX_STAT_ACK) &&
1728 		    !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1729 			info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1730 		info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1731 
1732 		/* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1733 		if (ieee80211_is_back_req(hdr->frame_control))
1734 			seq_ctl = 0;
1735 		else if (status != TX_STATUS_SUCCESS)
1736 			seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1737 
1738 		if (unlikely(!seq_ctl)) {
1739 			/*
1740 			 * If it is an NDP, we can't update next_reclaim since
1741 			 * its sequence control is 0. Note that for that same
1742 			 * reason, NDPs are never sent to A-MPDU'able queues
1743 			 * so that we can never have more than one freed frame
1744 			 * for a single Tx resonse (see WARN_ON below).
1745 			 */
1746 			if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1747 				is_ndp = true;
1748 		}
1749 
1750 		/*
1751 		 * TODO: this is not accurate if we are freeing more than one
1752 		 * packet.
1753 		 */
1754 		info->status.tx_time =
1755 			le16_to_cpu(tx_resp->wireless_media_time);
1756 		BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1757 		lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1758 		info->status.status_driver_data[0] =
1759 			RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1760 
1761 		if (likely(!iwl_mvm_time_sync_frame(mvm, skb, hdr->addr1)))
1762 			ieee80211_tx_status(mvm->hw, skb);
1763 	}
1764 
1765 	/* This is an aggregation queue or might become one, so we use
1766 	 * the ssn since: ssn = wifi seq_num % 256.
1767 	 * The seq_ctl is the sequence control of the packet to which
1768 	 * this Tx response relates. But if there is a hole in the
1769 	 * bitmap of the BA we received, this Tx response may allow to
1770 	 * reclaim the hole and all the subsequent packets that were
1771 	 * already acked. In that case, seq_ctl != ssn, and the next
1772 	 * packet to be reclaimed will be ssn and not seq_ctl. In that
1773 	 * case, several packets will be reclaimed even if
1774 	 * frame_count = 1.
1775 	 *
1776 	 * The ssn is the index (% 256) of the latest packet that has
1777 	 * treated (acked / dropped) + 1.
1778 	 */
1779 	next_reclaimed = ssn;
1780 
1781 	IWL_DEBUG_TX_REPLY(mvm,
1782 			   "TXQ %d status %s (0x%08x)\n",
1783 			   txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1784 
1785 	IWL_DEBUG_TX_REPLY(mvm,
1786 			   "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1787 			   le32_to_cpu(tx_resp->initial_rate),
1788 			   tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1789 			   ssn, next_reclaimed, seq_ctl);
1790 
1791 	rcu_read_lock();
1792 
1793 	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1794 	/*
1795 	 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1796 	 * the firmware while we still have packets for it in the Tx queues.
1797 	 */
1798 	if (WARN_ON_ONCE(!sta))
1799 		goto out;
1800 
1801 	if (!IS_ERR(sta)) {
1802 		struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1803 
1804 		iwl_mvm_tx_airtime(mvm, mvmsta,
1805 				   le16_to_cpu(tx_resp->wireless_media_time));
1806 
1807 		if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1808 		    mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
1809 			iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
1810 
1811 		if (sta->wme && tid != IWL_MGMT_TID) {
1812 			struct iwl_mvm_tid_data *tid_data =
1813 				&mvmsta->tid_data[tid];
1814 			bool send_eosp_ndp = false;
1815 
1816 			spin_lock_bh(&mvmsta->lock);
1817 
1818 			if (!is_ndp) {
1819 				tid_data->next_reclaimed = next_reclaimed;
1820 				IWL_DEBUG_TX_REPLY(mvm,
1821 						   "Next reclaimed packet:%d\n",
1822 						   next_reclaimed);
1823 			} else {
1824 				IWL_DEBUG_TX_REPLY(mvm,
1825 						   "NDP - don't update next_reclaimed\n");
1826 			}
1827 
1828 			iwl_mvm_check_ratid_empty(mvm, sta, tid);
1829 
1830 			if (mvmsta->sleep_tx_count) {
1831 				mvmsta->sleep_tx_count--;
1832 				if (mvmsta->sleep_tx_count &&
1833 				    !iwl_mvm_tid_queued(mvm, tid_data)) {
1834 					/*
1835 					 * The number of frames in the queue
1836 					 * dropped to 0 even if we sent less
1837 					 * frames than we thought we had on the
1838 					 * Tx queue.
1839 					 * This means we had holes in the BA
1840 					 * window that we just filled, ask
1841 					 * mac80211 to send EOSP since the
1842 					 * firmware won't know how to do that.
1843 					 * Send NDP and the firmware will send
1844 					 * EOSP notification that will trigger
1845 					 * a call to ieee80211_sta_eosp().
1846 					 */
1847 					send_eosp_ndp = true;
1848 				}
1849 			}
1850 
1851 			spin_unlock_bh(&mvmsta->lock);
1852 			if (send_eosp_ndp) {
1853 				iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1854 					IEEE80211_FRAME_RELEASE_UAPSD,
1855 					1, tid, false, false);
1856 				mvmsta->sleep_tx_count = 0;
1857 				ieee80211_send_eosp_nullfunc(sta, tid);
1858 			}
1859 		}
1860 
1861 		if (mvmsta->next_status_eosp) {
1862 			mvmsta->next_status_eosp = false;
1863 			ieee80211_sta_eosp(sta);
1864 		}
1865 	}
1866 out:
1867 	rcu_read_unlock();
1868 }
1869 
1870 #ifdef CONFIG_IWLWIFI_DEBUG
1871 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1872 static const char *iwl_get_agg_tx_status(u16 status)
1873 {
1874 	switch (status & AGG_TX_STATE_STATUS_MSK) {
1875 	AGG_TX_STATE_(TRANSMITTED);
1876 	AGG_TX_STATE_(UNDERRUN);
1877 	AGG_TX_STATE_(BT_PRIO);
1878 	AGG_TX_STATE_(FEW_BYTES);
1879 	AGG_TX_STATE_(ABORT);
1880 	AGG_TX_STATE_(TX_ON_AIR_DROP);
1881 	AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1882 	AGG_TX_STATE_(LAST_SENT_BT_KILL);
1883 	AGG_TX_STATE_(SCD_QUERY);
1884 	AGG_TX_STATE_(TEST_BAD_CRC32);
1885 	AGG_TX_STATE_(RESPONSE);
1886 	AGG_TX_STATE_(DUMP_TX);
1887 	AGG_TX_STATE_(DELAY_TX);
1888 	}
1889 
1890 	return "UNKNOWN";
1891 }
1892 
1893 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1894 				      struct iwl_rx_packet *pkt)
1895 {
1896 	struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1897 	struct agg_tx_status *frame_status =
1898 		iwl_mvm_get_agg_status(mvm, tx_resp);
1899 	int i;
1900 	bool tirgger_timepoint = false;
1901 
1902 	for (i = 0; i < tx_resp->frame_count; i++) {
1903 		u16 fstatus = le16_to_cpu(frame_status[i].status);
1904 		/* In case one frame wasn't transmitted trigger time point */
1905 		tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) !=
1906 				      AGG_TX_STATE_TRANSMITTED);
1907 		IWL_DEBUG_TX_REPLY(mvm,
1908 				   "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1909 				   iwl_get_agg_tx_status(fstatus),
1910 				   fstatus & AGG_TX_STATE_STATUS_MSK,
1911 				   (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1912 					AGG_TX_STATE_TRY_CNT_POS,
1913 				   le16_to_cpu(frame_status[i].sequence));
1914 	}
1915 
1916 	if (tirgger_timepoint)
1917 		iwl_dbg_tlv_time_point(&mvm->fwrt,
1918 				       IWL_FW_INI_TIME_POINT_TX_FAILED, NULL);
1919 
1920 }
1921 #else
1922 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1923 				      struct iwl_rx_packet *pkt)
1924 {}
1925 #endif /* CONFIG_IWLWIFI_DEBUG */
1926 
1927 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1928 				  struct iwl_rx_packet *pkt)
1929 {
1930 	struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1931 	int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1932 	int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1933 	u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1934 	struct iwl_mvm_sta *mvmsta;
1935 	int queue = SEQ_TO_QUEUE(sequence);
1936 	struct ieee80211_sta *sta;
1937 
1938 	if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1939 			 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1940 		return;
1941 
1942 	iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1943 
1944 	rcu_read_lock();
1945 
1946 	mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1947 
1948 	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1949 	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta) || !sta->wme)) {
1950 		rcu_read_unlock();
1951 		return;
1952 	}
1953 
1954 	if (!WARN_ON_ONCE(!mvmsta)) {
1955 		mvmsta->tid_data[tid].rate_n_flags =
1956 			le32_to_cpu(tx_resp->initial_rate);
1957 		mvmsta->tid_data[tid].tx_time =
1958 			le16_to_cpu(tx_resp->wireless_media_time);
1959 		mvmsta->tid_data[tid].lq_color =
1960 			TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1961 		iwl_mvm_tx_airtime(mvm, mvmsta,
1962 				   le16_to_cpu(tx_resp->wireless_media_time));
1963 	}
1964 
1965 	rcu_read_unlock();
1966 }
1967 
1968 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1969 {
1970 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
1971 	struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1972 
1973 	if (tx_resp->frame_count == 1)
1974 		iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1975 	else
1976 		iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1977 }
1978 
1979 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1980 			       int txq, int index,
1981 			       struct ieee80211_tx_info *tx_info, u32 rate,
1982 			       bool is_flush)
1983 {
1984 	struct sk_buff_head reclaimed_skbs;
1985 	struct iwl_mvm_tid_data *tid_data = NULL;
1986 	struct ieee80211_sta *sta;
1987 	struct iwl_mvm_sta *mvmsta = NULL;
1988 	struct sk_buff *skb;
1989 	int freed;
1990 
1991 	if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations ||
1992 		      tid > IWL_MAX_TID_COUNT,
1993 		      "sta_id %d tid %d", sta_id, tid))
1994 		return;
1995 
1996 	rcu_read_lock();
1997 
1998 	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1999 
2000 	/* Reclaiming frames for a station that has been deleted ? */
2001 	if (WARN_ON_ONCE(!sta)) {
2002 		rcu_read_unlock();
2003 		return;
2004 	}
2005 
2006 	__skb_queue_head_init(&reclaimed_skbs);
2007 
2008 	/*
2009 	 * Release all TFDs before the SSN, i.e. all TFDs in front of
2010 	 * block-ack window (we assume that they've been successfully
2011 	 * transmitted ... if not, it's too late anyway).
2012 	 */
2013 	iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs, is_flush);
2014 
2015 	skb_queue_walk(&reclaimed_skbs, skb) {
2016 		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2017 
2018 		iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
2019 
2020 		memset(&info->status, 0, sizeof(info->status));
2021 		/* Packet was transmitted successfully, failures come as single
2022 		 * frames because before failing a frame the firmware transmits
2023 		 * it without aggregation at least once.
2024 		 */
2025 		if (!is_flush)
2026 			info->flags |= IEEE80211_TX_STAT_ACK;
2027 		else
2028 			info->flags &= ~IEEE80211_TX_STAT_ACK;
2029 	}
2030 
2031 	/*
2032 	 * It's possible to get a BA response after invalidating the rcu (rcu is
2033 	 * invalidated in order to prevent new Tx from being sent, but there may
2034 	 * be some frames already in-flight).
2035 	 * In this case we just want to reclaim, and could skip all the
2036 	 * sta-dependent stuff since it's in the middle of being removed
2037 	 * anyways.
2038 	 */
2039 	if (IS_ERR(sta))
2040 		goto out;
2041 
2042 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
2043 	tid_data = &mvmsta->tid_data[tid];
2044 
2045 	if (tid_data->txq_id != txq) {
2046 		IWL_ERR(mvm,
2047 			"invalid reclaim request: Q %d, tid %d\n",
2048 			tid_data->txq_id, tid);
2049 		rcu_read_unlock();
2050 		return;
2051 	}
2052 
2053 	spin_lock_bh(&mvmsta->lock);
2054 
2055 	tid_data->next_reclaimed = index;
2056 
2057 	iwl_mvm_check_ratid_empty(mvm, sta, tid);
2058 
2059 	freed = 0;
2060 
2061 	/* pack lq color from tid_data along the reduced txp */
2062 	tx_info->status.status_driver_data[0] =
2063 		RS_DRV_DATA_PACK(tid_data->lq_color,
2064 				 tx_info->status.status_driver_data[0]);
2065 	tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
2066 
2067 	skb_queue_walk(&reclaimed_skbs, skb) {
2068 		struct ieee80211_hdr *hdr = (void *)skb->data;
2069 		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2070 
2071 		if (!is_flush) {
2072 			if (ieee80211_is_data_qos(hdr->frame_control))
2073 				freed++;
2074 			else
2075 				WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
2076 		}
2077 
2078 		/* this is the first skb we deliver in this batch */
2079 		/* put the rate scaling data there */
2080 		if (freed == 1) {
2081 			info->flags |= IEEE80211_TX_STAT_AMPDU;
2082 			memcpy(&info->status, &tx_info->status,
2083 			       sizeof(tx_info->status));
2084 			iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info);
2085 		}
2086 	}
2087 
2088 	spin_unlock_bh(&mvmsta->lock);
2089 
2090 	/* We got a BA notif with 0 acked or scd_ssn didn't progress which is
2091 	 * possible (i.e. first MPDU in the aggregation wasn't acked)
2092 	 * Still it's important to update RS about sent vs. acked.
2093 	 */
2094 	if (!is_flush && skb_queue_empty(&reclaimed_skbs) &&
2095 	    !iwl_mvm_has_tlc_offload(mvm)) {
2096 		struct ieee80211_chanctx_conf *chanctx_conf = NULL;
2097 
2098 		/* no TLC offload, so non-MLD mode */
2099 		if (mvmsta->vif)
2100 			chanctx_conf =
2101 				rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf);
2102 
2103 		if (WARN_ON_ONCE(!chanctx_conf))
2104 			goto out;
2105 
2106 		tx_info->band = chanctx_conf->def.chan->band;
2107 		iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info);
2108 
2109 		IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
2110 		iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false);
2111 	}
2112 
2113 out:
2114 	rcu_read_unlock();
2115 
2116 	while (!skb_queue_empty(&reclaimed_skbs)) {
2117 		skb = __skb_dequeue(&reclaimed_skbs);
2118 		ieee80211_tx_status(mvm->hw, skb);
2119 	}
2120 }
2121 
2122 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
2123 {
2124 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
2125 	unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
2126 	int sta_id, tid, txq, index;
2127 	struct ieee80211_tx_info ba_info = {};
2128 	struct iwl_mvm_ba_notif *ba_notif;
2129 	struct iwl_mvm_tid_data *tid_data;
2130 	struct iwl_mvm_sta *mvmsta;
2131 
2132 	ba_info.flags = IEEE80211_TX_STAT_AMPDU;
2133 
2134 	if (iwl_mvm_has_new_tx_api(mvm)) {
2135 		struct iwl_mvm_compressed_ba_notif *ba_res =
2136 			(void *)pkt->data;
2137 		u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
2138 		u16 tfd_cnt;
2139 		int i;
2140 
2141 		if (IWL_FW_CHECK(mvm, sizeof(*ba_res) > pkt_len,
2142 				 "short BA notification (%d)\n", pkt_len))
2143 			return;
2144 
2145 		sta_id = ba_res->sta_id;
2146 		ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
2147 		ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
2148 		ba_info.status.tx_time =
2149 			(u16)le32_to_cpu(ba_res->wireless_time);
2150 		ba_info.status.status_driver_data[0] =
2151 			(void *)(uintptr_t)ba_res->reduced_txp;
2152 
2153 		tfd_cnt = le16_to_cpu(ba_res->tfd_cnt);
2154 		if (!tfd_cnt)
2155 			return;
2156 
2157 		if (IWL_FW_CHECK(mvm,
2158 				 struct_size(ba_res, tfd, tfd_cnt) > pkt_len,
2159 				 "short BA notification (tfds:%d, size:%d)\n",
2160 				 tfd_cnt, pkt_len))
2161 			return;
2162 
2163 		rcu_read_lock();
2164 
2165 		mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2166 		/*
2167 		 * It's possible to get a BA response after invalidating the rcu
2168 		 * (rcu is invalidated in order to prevent new Tx from being
2169 		 * sent, but there may be some frames already in-flight).
2170 		 * In this case we just want to reclaim, and could skip all the
2171 		 * sta-dependent stuff since it's in the middle of being removed
2172 		 * anyways.
2173 		 */
2174 
2175 		/* Free per TID */
2176 		for (i = 0; i < tfd_cnt; i++) {
2177 			struct iwl_mvm_compressed_ba_tfd *ba_tfd =
2178 				&ba_res->tfd[i];
2179 
2180 			tid = ba_tfd->tid;
2181 			if (tid == IWL_MGMT_TID)
2182 				tid = IWL_MAX_TID_COUNT;
2183 
2184 			if (mvmsta)
2185 				mvmsta->tid_data[i].lq_color = lq_color;
2186 
2187 			iwl_mvm_tx_reclaim(mvm, sta_id, tid,
2188 					   (int)(le16_to_cpu(ba_tfd->q_num)),
2189 					   le16_to_cpu(ba_tfd->tfd_index),
2190 					   &ba_info,
2191 					   le32_to_cpu(ba_res->tx_rate), false);
2192 		}
2193 
2194 		if (mvmsta)
2195 			iwl_mvm_tx_airtime(mvm, mvmsta,
2196 					   le32_to_cpu(ba_res->wireless_time));
2197 		rcu_read_unlock();
2198 
2199 		IWL_DEBUG_TX_REPLY(mvm,
2200 				   "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
2201 				   sta_id, le32_to_cpu(ba_res->flags),
2202 				   le16_to_cpu(ba_res->txed),
2203 				   le16_to_cpu(ba_res->done));
2204 		return;
2205 	}
2206 
2207 	ba_notif = (void *)pkt->data;
2208 	sta_id = ba_notif->sta_id;
2209 	tid = ba_notif->tid;
2210 	/* "flow" corresponds to Tx queue */
2211 	txq = le16_to_cpu(ba_notif->scd_flow);
2212 	/* "ssn" is start of block-ack Tx window, corresponds to index
2213 	 * (in Tx queue's circular buffer) of first TFD/frame in window */
2214 	index = le16_to_cpu(ba_notif->scd_ssn);
2215 
2216 	rcu_read_lock();
2217 	mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2218 	if (IWL_FW_CHECK(mvm, !mvmsta,
2219 			 "invalid STA ID %d in BA notif\n",
2220 			 sta_id)) {
2221 		rcu_read_unlock();
2222 		return;
2223 	}
2224 
2225 	tid_data = &mvmsta->tid_data[tid];
2226 
2227 	ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
2228 	ba_info.status.ampdu_len = ba_notif->txed;
2229 	ba_info.status.tx_time = tid_data->tx_time;
2230 	ba_info.status.status_driver_data[0] =
2231 		(void *)(uintptr_t)ba_notif->reduced_txp;
2232 
2233 	rcu_read_unlock();
2234 
2235 	iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
2236 			   tid_data->rate_n_flags, false);
2237 
2238 	IWL_DEBUG_TX_REPLY(mvm,
2239 			   "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
2240 			   ba_notif->sta_addr, ba_notif->sta_id);
2241 
2242 	IWL_DEBUG_TX_REPLY(mvm,
2243 			   "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
2244 			   ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
2245 			   le64_to_cpu(ba_notif->bitmap), txq, index,
2246 			   ba_notif->txed, ba_notif->txed_2_done);
2247 
2248 	IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
2249 			   ba_notif->reduced_txp);
2250 }
2251 
2252 /*
2253  * Note that there are transports that buffer frames before they reach
2254  * the firmware. This means that after flush_tx_path is called, the
2255  * queue might not be empty. The race-free way to handle this is to:
2256  * 1) set the station as draining
2257  * 2) flush the Tx path
2258  * 3) wait for the transport queues to be empty
2259  */
2260 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk)
2261 {
2262 	int ret;
2263 	struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
2264 		.queues_ctl = cpu_to_le32(tfd_msk),
2265 		.flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
2266 	};
2267 
2268 	WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2269 	ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0,
2270 				   sizeof(flush_cmd), &flush_cmd);
2271 	if (ret)
2272 		IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2273 	return ret;
2274 }
2275 
2276 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids)
2277 {
2278 	int ret;
2279 	struct iwl_tx_path_flush_cmd_rsp *rsp;
2280 	struct iwl_tx_path_flush_cmd flush_cmd = {
2281 		.sta_id = cpu_to_le32(sta_id),
2282 		.tid_mask = cpu_to_le16(tids),
2283 	};
2284 
2285 	struct iwl_host_cmd cmd = {
2286 		.id = TXPATH_FLUSH,
2287 		.len = { sizeof(flush_cmd), },
2288 		.data = { &flush_cmd, },
2289 	};
2290 
2291 	WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2292 
2293 	if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0)
2294 		cmd.flags |= CMD_WANT_SKB | CMD_SEND_IN_RFKILL;
2295 
2296 	IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n",
2297 			    sta_id, tids);
2298 
2299 	ret = iwl_mvm_send_cmd(mvm, &cmd);
2300 
2301 	if (ret) {
2302 		IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2303 		return ret;
2304 	}
2305 
2306 	if (cmd.flags & CMD_WANT_SKB) {
2307 		int i;
2308 		int num_flushed_queues;
2309 
2310 		if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) {
2311 			ret = -EIO;
2312 			goto free_rsp;
2313 		}
2314 
2315 		rsp = (void *)cmd.resp_pkt->data;
2316 
2317 		if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id,
2318 			      "sta_id %d != rsp_sta_id %d",
2319 			      sta_id, le16_to_cpu(rsp->sta_id))) {
2320 			ret = -EIO;
2321 			goto free_rsp;
2322 		}
2323 
2324 		num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues);
2325 		if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP,
2326 			      "num_flushed_queues %d", num_flushed_queues)) {
2327 			ret = -EIO;
2328 			goto free_rsp;
2329 		}
2330 
2331 		for (i = 0; i < num_flushed_queues; i++) {
2332 			struct ieee80211_tx_info tx_info = {};
2333 			struct iwl_flush_queue_info *queue_info = &rsp->queues[i];
2334 			int tid = le16_to_cpu(queue_info->tid);
2335 			int read_before = le16_to_cpu(queue_info->read_before_flush);
2336 			int read_after = le16_to_cpu(queue_info->read_after_flush);
2337 			int queue_num = le16_to_cpu(queue_info->queue_num);
2338 
2339 			if (tid == IWL_MGMT_TID)
2340 				tid = IWL_MAX_TID_COUNT;
2341 
2342 			IWL_DEBUG_TX_QUEUES(mvm,
2343 					    "tid %d queue_id %d read-before %d read-after %d\n",
2344 					    tid, queue_num, read_before, read_after);
2345 
2346 			iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after,
2347 					   &tx_info, 0, true);
2348 		}
2349 free_rsp:
2350 		iwl_free_resp(&cmd);
2351 	}
2352 	return ret;
2353 }
2354 
2355 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, u32 sta_id, u32 tfd_queue_mask)
2356 {
2357 	if (iwl_mvm_has_new_tx_api(mvm))
2358 		return iwl_mvm_flush_sta_tids(mvm, sta_id, 0xffff);
2359 
2360 	return iwl_mvm_flush_tx_path(mvm, tfd_queue_mask);
2361 }
2362