xref: /linux/drivers/net/wireless/intel/iwlwifi/mvm/tx.c (revision 8e1bb4a41aa78d6105e59186af3dcd545fc66e70)
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-nvm-utils.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_convert_rate_idx(struct iwl_mvm *mvm,
266 				    struct ieee80211_tx_info *info,
267 				    int rate_idx)
268 {
269 	u32 rate_flags = 0;
270 	u8 rate_plcp;
271 	bool is_cck;
272 
273 	/* if the rate isn't a well known legacy rate, take the lowest one */
274 	if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
275 		rate_idx = iwl_mvm_mac_ctxt_get_lowest_rate(mvm,
276 							    info,
277 							    info->control.vif);
278 
279 	/* Get PLCP rate for tx_cmd->rate_n_flags */
280 	rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx);
281 	is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) &&
282 		 (rate_idx <= IWL_LAST_CCK_RATE);
283 
284 	/* Set CCK or OFDM flag */
285 	if (iwl_fw_lookup_cmd_ver(mvm->fw, TX_CMD, 0) > 8) {
286 		if (!is_cck)
287 			rate_flags |= RATE_MCS_LEGACY_OFDM_MSK;
288 		else
289 			rate_flags |= RATE_MCS_CCK_MSK;
290 	} else if (is_cck) {
291 		rate_flags |= RATE_MCS_CCK_MSK_V1;
292 	}
293 
294 	return (u32)rate_plcp | rate_flags;
295 }
296 
297 static u32 iwl_mvm_get_inject_tx_rate(struct iwl_mvm *mvm,
298 				      struct ieee80211_tx_info *info,
299 				      struct ieee80211_sta *sta,
300 				      __le16 fc)
301 {
302 	struct ieee80211_tx_rate *rate = &info->control.rates[0];
303 	u32 result;
304 
305 	/*
306 	 * we only care about legacy/HT/VHT so far, so we can
307 	 * build in v1 and use iwl_new_rate_from_v1()
308 	 */
309 
310 	if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
311 		u8 mcs = ieee80211_rate_get_vht_mcs(rate);
312 		u8 nss = ieee80211_rate_get_vht_nss(rate);
313 
314 		result = RATE_MCS_VHT_MSK_V1;
315 		result |= u32_encode_bits(mcs, RATE_VHT_MCS_RATE_CODE_MSK);
316 		result |= u32_encode_bits(nss, RATE_MCS_NSS_MSK);
317 		if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
318 			result |= RATE_MCS_SGI_MSK_V1;
319 		if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
320 			result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1);
321 		else if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
322 			result |= u32_encode_bits(2, RATE_MCS_CHAN_WIDTH_MSK_V1);
323 		else if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
324 			result |= u32_encode_bits(3, RATE_MCS_CHAN_WIDTH_MSK_V1);
325 
326 		if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 6)
327 			result = iwl_new_rate_from_v1(result);
328 	} else if (rate->flags & IEEE80211_TX_RC_MCS) {
329 		result = RATE_MCS_HT_MSK_V1;
330 		result |= u32_encode_bits(rate->idx,
331 					  RATE_HT_MCS_RATE_CODE_MSK_V1 |
332 					  RATE_HT_MCS_NSS_MSK_V1);
333 		if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
334 			result |= RATE_MCS_SGI_MSK_V1;
335 		if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
336 			result |= u32_encode_bits(1, RATE_MCS_CHAN_WIDTH_MSK_V1);
337 		if (info->flags & IEEE80211_TX_CTL_LDPC)
338 			result |= RATE_MCS_LDPC_MSK_V1;
339 		if (u32_get_bits(info->flags, IEEE80211_TX_CTL_STBC))
340 			result |= RATE_MCS_STBC_MSK;
341 
342 		if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 6)
343 			result = iwl_new_rate_from_v1(result);
344 	} else {
345 		int rate_idx = info->control.rates[0].idx;
346 
347 		result = iwl_mvm_convert_rate_idx(mvm, info, rate_idx);
348 	}
349 
350 	if (info->control.antennas)
351 		result |= u32_encode_bits(info->control.antennas,
352 					  RATE_MCS_ANT_AB_MSK);
353 	else
354 		result |= iwl_mvm_get_tx_ant(mvm, info, sta, fc);
355 
356 	return result;
357 }
358 
359 static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
360 			       struct ieee80211_tx_info *info,
361 			       struct ieee80211_sta *sta, __le16 fc)
362 {
363 	int rate_idx = -1;
364 
365 	if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) {
366 		/* info->control is only relevant for non HW rate control */
367 
368 		/* HT rate doesn't make sense for a non data frame */
369 		WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS &&
370 			  !ieee80211_is_data(fc),
371 			  "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n",
372 			  info->control.rates[0].flags,
373 			  info->control.rates[0].idx,
374 			  le16_to_cpu(fc),
375 			  sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1);
376 
377 		rate_idx = info->control.rates[0].idx;
378 
379 		/* For non 2 GHZ band, remap mac80211 rate indices into driver
380 		 * indices.
381 		 */
382 		if (info->band != NL80211_BAND_2GHZ ||
383 		    (info->flags & IEEE80211_TX_CTL_NO_CCK_RATE))
384 			rate_idx += IWL_FIRST_OFDM_RATE;
385 
386 		/* For 2.4 GHZ band, check that there is no need to remap */
387 		BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
388 	}
389 
390 	return iwl_mvm_convert_rate_idx(mvm, info, rate_idx);
391 }
392 
393 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm,
394 				       struct ieee80211_tx_info *info,
395 				       struct ieee80211_sta *sta, __le16 fc)
396 {
397 	if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))
398 		return iwl_mvm_get_inject_tx_rate(mvm, info, sta, fc);
399 
400 	return iwl_mvm_get_tx_rate(mvm, info, sta, fc) |
401 		iwl_mvm_get_tx_ant(mvm, info, sta, fc);
402 }
403 
404 /*
405  * Sets the fields in the Tx cmd that are rate related
406  */
407 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
408 			    struct ieee80211_tx_info *info,
409 			    struct ieee80211_sta *sta, __le16 fc)
410 {
411 	/* Set retry limit on RTS packets */
412 	tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
413 
414 	/* Set retry limit on DATA packets and Probe Responses*/
415 	if (ieee80211_is_probe_resp(fc)) {
416 		tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
417 		tx_cmd->rts_retry_limit =
418 			min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
419 	} else if (ieee80211_is_back_req(fc)) {
420 		tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
421 	} else {
422 		tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
423 	}
424 
425 	/*
426 	 * for data packets, rate info comes from the table inside the fw. This
427 	 * table is controlled by LINK_QUALITY commands
428 	 */
429 
430 	if (likely(ieee80211_is_data(fc) && sta &&
431 		   !(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))) {
432 		struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
433 
434 		if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) {
435 			tx_cmd->initial_rate_index = 0;
436 			tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
437 			return;
438 		}
439 	} else if (ieee80211_is_back_req(fc)) {
440 		tx_cmd->tx_flags |=
441 			cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
442 	}
443 
444 	/* Set the rate in the TX cmd */
445 	tx_cmd->rate_n_flags =
446 		cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc));
447 }
448 
449 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
450 					 u8 *crypto_hdr)
451 {
452 	struct ieee80211_key_conf *keyconf = info->control.hw_key;
453 	u64 pn;
454 
455 	pn = atomic64_inc_return(&keyconf->tx_pn);
456 	crypto_hdr[0] = pn;
457 	crypto_hdr[2] = 0;
458 	crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
459 	crypto_hdr[1] = pn >> 8;
460 	crypto_hdr[4] = pn >> 16;
461 	crypto_hdr[5] = pn >> 24;
462 	crypto_hdr[6] = pn >> 32;
463 	crypto_hdr[7] = pn >> 40;
464 }
465 
466 /*
467  * Sets the fields in the Tx cmd that are crypto related
468  */
469 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
470 				      struct ieee80211_tx_info *info,
471 				      struct iwl_tx_cmd *tx_cmd,
472 				      struct sk_buff *skb_frag,
473 				      int hdrlen)
474 {
475 	struct ieee80211_key_conf *keyconf = info->control.hw_key;
476 	u8 *crypto_hdr = skb_frag->data + hdrlen;
477 	enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM;
478 	u64 pn;
479 
480 	switch (keyconf->cipher) {
481 	case WLAN_CIPHER_SUITE_CCMP:
482 		iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
483 		iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
484 		break;
485 
486 	case WLAN_CIPHER_SUITE_TKIP:
487 		tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
488 		pn = atomic64_inc_return(&keyconf->tx_pn);
489 		ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
490 		ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
491 		break;
492 
493 	case WLAN_CIPHER_SUITE_WEP104:
494 		tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
495 		fallthrough;
496 	case WLAN_CIPHER_SUITE_WEP40:
497 		tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
498 			((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
499 			  TX_CMD_SEC_WEP_KEY_IDX_MSK);
500 
501 		memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
502 		break;
503 	case WLAN_CIPHER_SUITE_GCMP:
504 	case WLAN_CIPHER_SUITE_GCMP_256:
505 		type = TX_CMD_SEC_GCMP;
506 		fallthrough;
507 	case WLAN_CIPHER_SUITE_CCMP_256:
508 		/* TODO: Taking the key from the table might introduce a race
509 		 * when PTK rekeying is done, having an old packets with a PN
510 		 * based on the old key but the message encrypted with a new
511 		 * one.
512 		 * Need to handle this.
513 		 */
514 		tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE;
515 		tx_cmd->key[0] = keyconf->hw_key_idx;
516 		iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
517 		break;
518 	default:
519 		tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
520 	}
521 }
522 
523 static bool iwl_mvm_use_host_rate(struct iwl_mvm *mvm,
524 				  struct iwl_mvm_sta *mvmsta,
525 				  struct ieee80211_hdr *hdr,
526 				  struct ieee80211_tx_info *info)
527 {
528 	if (unlikely(!mvmsta))
529 		return true;
530 
531 	if (unlikely(info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT))
532 		return true;
533 
534 	if (likely(ieee80211_is_data(hdr->frame_control) &&
535 		   mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED))
536 		return false;
537 
538 	/*
539 	 * Not a data frame, use host rate if on an old device that
540 	 * can't possibly be doing MLO (firmware may be selecting a
541 	 * bad rate), if we might be doing MLO we need to let FW pick
542 	 * (since we don't necesarily know the link), but FW rate
543 	 * selection was fixed.
544 	 */
545 	return mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ;
546 }
547 
548 static void iwl_mvm_copy_hdr(void *cmd, const void *hdr, int hdrlen,
549 			     const u8 *addr3_override)
550 {
551 	struct ieee80211_hdr *out_hdr = cmd;
552 
553 	memcpy(cmd, hdr, hdrlen);
554 	if (addr3_override)
555 		memcpy(out_hdr->addr3, addr3_override, ETH_ALEN);
556 }
557 
558 /*
559  * Allocates and sets the Tx cmd the driver data pointers in the skb
560  */
561 static struct iwl_device_tx_cmd *
562 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
563 		      struct ieee80211_tx_info *info, int hdrlen,
564 		      struct ieee80211_sta *sta, u8 sta_id,
565 		      const u8 *addr3_override)
566 {
567 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
568 	struct iwl_device_tx_cmd *dev_cmd;
569 	struct iwl_tx_cmd *tx_cmd;
570 
571 	dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
572 
573 	if (unlikely(!dev_cmd))
574 		return NULL;
575 
576 	dev_cmd->hdr.cmd = TX_CMD;
577 
578 	if (iwl_mvm_has_new_tx_api(mvm)) {
579 		u32 rate_n_flags = 0;
580 		u16 flags = 0;
581 		struct iwl_mvm_sta *mvmsta = sta ?
582 			iwl_mvm_sta_from_mac80211(sta) : NULL;
583 		bool amsdu = false;
584 
585 		if (ieee80211_is_data_qos(hdr->frame_control)) {
586 			u8 *qc = ieee80211_get_qos_ctl(hdr);
587 
588 			amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
589 		}
590 
591 		if (!info->control.hw_key)
592 			flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
593 
594 		/*
595 		 * For data and mgmt packets rate info comes from the fw (for
596 		 * new devices, older FW is somewhat broken for this). Only
597 		 * set rate/antenna for injected frames with fixed rate, or
598 		 * when no sta is given, or with older firmware.
599 		 */
600 		if (unlikely(iwl_mvm_use_host_rate(mvm, mvmsta, hdr, info))) {
601 			flags |= IWL_TX_FLAGS_CMD_RATE;
602 			rate_n_flags =
603 				iwl_mvm_get_tx_rate_n_flags(mvm, info, sta,
604 							    hdr->frame_control);
605 		} else if (!ieee80211_is_data(hdr->frame_control) ||
606 			   mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
607 			/* These are important frames */
608 			flags |= IWL_TX_FLAGS_HIGH_PRI;
609 		}
610 
611 		if (mvm->trans->trans_cfg->device_family >=
612 		    IWL_DEVICE_FAMILY_AX210) {
613 			struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload;
614 			u32 offload_assist = iwl_mvm_tx_csum(mvm, skb,
615 							     info, amsdu);
616 
617 			cmd->offload_assist = cpu_to_le32(offload_assist);
618 
619 			/* Total # bytes to be transmitted */
620 			cmd->len = cpu_to_le16((u16)skb->len);
621 
622 			/* Copy MAC header from skb into command buffer */
623 			iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override);
624 
625 			cmd->flags = cpu_to_le16(flags);
626 			cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
627 		} else {
628 			struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
629 			u16 offload_assist = iwl_mvm_tx_csum(mvm, skb,
630 							     info, amsdu);
631 
632 			cmd->offload_assist = cpu_to_le16(offload_assist);
633 
634 			/* Total # bytes to be transmitted */
635 			cmd->len = cpu_to_le16((u16)skb->len);
636 
637 			/* Copy MAC header from skb into command buffer */
638 			iwl_mvm_copy_hdr(cmd->hdr, hdr, hdrlen, addr3_override);
639 
640 			cmd->flags = cpu_to_le32(flags);
641 			cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
642 		}
643 		goto out;
644 	}
645 
646 	tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
647 
648 	if (info->control.hw_key)
649 		iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
650 
651 	iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
652 
653 	iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
654 
655 	/* Copy MAC header from skb into command buffer */
656 	iwl_mvm_copy_hdr(tx_cmd->hdr, hdr, hdrlen, addr3_override);
657 
658 out:
659 	return dev_cmd;
660 }
661 
662 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
663 				       struct iwl_device_tx_cmd *cmd)
664 {
665 	struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
666 
667 	memset(&skb_info->status, 0, sizeof(skb_info->status));
668 	memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
669 
670 	skb_info->driver_data[1] = cmd;
671 }
672 
673 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
674 				      struct iwl_mvm_vif_link_info *link,
675 				      struct ieee80211_tx_info *info,
676 				      struct sk_buff *skb)
677 {
678 	struct ieee80211_hdr *hdr = (void *)skb->data;
679 	__le16 fc = hdr->frame_control;
680 
681 	switch (info->control.vif->type) {
682 	case NL80211_IFTYPE_AP:
683 	case NL80211_IFTYPE_ADHOC:
684 		/*
685 		 * Non-bufferable frames use the broadcast station, thus they
686 		 * use the probe queue.
687 		 * Also take care of the case where we send a deauth to a
688 		 * station that we don't have, or similarly an association
689 		 * response (with non-success status) for a station we can't
690 		 * accept.
691 		 * Also, disassociate frames might happen, particular with
692 		 * reason 7 ("Class 3 frame received from nonassociated STA").
693 		 */
694 		if (ieee80211_is_mgmt(fc) &&
695 		    (!ieee80211_is_bufferable_mmpdu(skb) ||
696 		     ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
697 			return link->mgmt_queue;
698 
699 		if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
700 		    is_multicast_ether_addr(hdr->addr1))
701 			return link->cab_queue;
702 
703 		WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
704 			  "fc=0x%02x", le16_to_cpu(fc));
705 		return link->mgmt_queue;
706 	case NL80211_IFTYPE_P2P_DEVICE:
707 		if (ieee80211_is_mgmt(fc))
708 			return mvm->p2p_dev_queue;
709 
710 		WARN_ON_ONCE(1);
711 		return mvm->p2p_dev_queue;
712 	default:
713 		WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
714 		return -1;
715 	}
716 }
717 
718 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
719 				       struct sk_buff *skb)
720 {
721 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
722 	struct iwl_mvm_vif *mvmvif =
723 		iwl_mvm_vif_from_mac80211(info->control.vif);
724 	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
725 	int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
726 	struct iwl_probe_resp_data *resp_data;
727 	const u8 *ie;
728 	u8 *pos;
729 	u8 match[] = {
730 		(WLAN_OUI_WFA >> 16) & 0xff,
731 		(WLAN_OUI_WFA >> 8) & 0xff,
732 		WLAN_OUI_WFA & 0xff,
733 		WLAN_OUI_TYPE_WFA_P2P,
734 	};
735 
736 	rcu_read_lock();
737 
738 	resp_data = rcu_dereference(mvmvif->deflink.probe_resp_data);
739 	if (!resp_data)
740 		goto out;
741 
742 	if (!resp_data->notif.noa_active)
743 		goto out;
744 
745 	ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
746 				    mgmt->u.probe_resp.variable,
747 				    skb->len - base_len,
748 				    match, 4, 2);
749 	if (!ie) {
750 		IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
751 		goto out;
752 	}
753 
754 	if (skb_tailroom(skb) < resp_data->noa_len) {
755 		if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
756 			IWL_ERR(mvm,
757 				"Failed to reallocate probe resp\n");
758 			goto out;
759 		}
760 	}
761 
762 	pos = skb_put(skb, resp_data->noa_len);
763 
764 	*pos++ = WLAN_EID_VENDOR_SPECIFIC;
765 	/* Set length of IE body (not including ID and length itself) */
766 	*pos++ = resp_data->noa_len - 2;
767 	*pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
768 	*pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
769 	*pos++ = WLAN_OUI_WFA & 0xff;
770 	*pos++ = WLAN_OUI_TYPE_WFA_P2P;
771 
772 	memcpy(pos, &resp_data->notif.noa_attr,
773 	       resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
774 
775 out:
776 	rcu_read_unlock();
777 }
778 
779 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
780 {
781 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
782 	struct ieee80211_tx_info info;
783 	struct iwl_device_tx_cmd *dev_cmd;
784 	u8 sta_id;
785 	int hdrlen = ieee80211_hdrlen(hdr->frame_control);
786 	__le16 fc = hdr->frame_control;
787 	bool offchannel = IEEE80211_SKB_CB(skb)->flags &
788 		IEEE80211_TX_CTL_TX_OFFCHAN;
789 	int queue = -1;
790 
791 	if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
792 		return -1;
793 
794 	memcpy(&info, skb->cb, sizeof(info));
795 
796 	if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen))
797 		return -1;
798 
799 	if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
800 		return -1;
801 
802 	if (info.control.vif) {
803 		struct iwl_mvm_vif *mvmvif =
804 			iwl_mvm_vif_from_mac80211(info.control.vif);
805 		bool p2p_aux = iwl_mvm_has_p2p_over_aux(mvm);
806 
807 		if ((info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE &&
808 		     p2p_aux) ||
809 		    (info.control.vif->type == NL80211_IFTYPE_STATION &&
810 		     offchannel)) {
811 			/*
812 			 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
813 			 * that can be used in 2 different types of vifs, P2P
814 			 * Device and STATION.
815 			 * P2P Device uses the offchannel queue.
816 			 * STATION (HS2.0) uses the auxiliary context of the FW,
817 			 * and hence needs to be sent on the aux queue.
818 			 * If P2P_DEV_OVER_AUX is supported (p2p_aux = true)
819 			 * also P2P Device uses the aux queue.
820 			 */
821 			sta_id = mvm->aux_sta.sta_id;
822 			queue = mvm->aux_queue;
823 			if (WARN_ON(queue == IWL_MVM_INVALID_QUEUE))
824 				return -1;
825 		} else if (info.control.vif->type ==
826 			   NL80211_IFTYPE_P2P_DEVICE ||
827 			   info.control.vif->type == NL80211_IFTYPE_AP ||
828 			   info.control.vif->type == NL80211_IFTYPE_ADHOC) {
829 			u32 link_id = u32_get_bits(info.control.flags,
830 						   IEEE80211_TX_CTRL_MLO_LINK);
831 			struct iwl_mvm_vif_link_info *link;
832 
833 			if (link_id == IEEE80211_LINK_UNSPECIFIED) {
834 				if (info.control.vif->active_links)
835 					link_id = ffs(info.control.vif->active_links) - 1;
836 				else
837 					link_id = 0;
838 			}
839 
840 			link = mvmvif->link[link_id];
841 			if (WARN_ON(!link))
842 				return -1;
843 
844 			if (!ieee80211_is_data(hdr->frame_control))
845 				sta_id = link->bcast_sta.sta_id;
846 			else
847 				sta_id = link->mcast_sta.sta_id;
848 
849 			queue = iwl_mvm_get_ctrl_vif_queue(mvm, link, &info,
850 							   skb);
851 		} else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
852 			queue = mvm->snif_queue;
853 			sta_id = mvm->snif_sta.sta_id;
854 		}
855 	}
856 
857 	if (queue < 0) {
858 		IWL_ERR(mvm, "No queue was found. Dropping TX\n");
859 		return -1;
860 	}
861 
862 	if (unlikely(ieee80211_is_probe_resp(fc)))
863 		iwl_mvm_probe_resp_set_noa(mvm, skb);
864 
865 	IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
866 
867 	dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id,
868 					NULL);
869 	if (!dev_cmd)
870 		return -1;
871 
872 	/* From now on, we cannot access info->control */
873 	iwl_mvm_skb_prepare_status(skb, dev_cmd);
874 
875 	if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
876 		iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
877 		return -1;
878 	}
879 
880 	return 0;
881 }
882 
883 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
884 				    struct ieee80211_sta *sta, unsigned int tid)
885 {
886 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
887 	u8 ac = tid_to_mac80211_ac[tid];
888 	enum nl80211_band band;
889 	unsigned int txf;
890 	unsigned int val;
891 	int lmac;
892 
893 	/* For HE redirect to trigger based fifos */
894 	if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
895 		ac += 4;
896 
897 	txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
898 
899 	/*
900 	 * Don't send an AMSDU that will be longer than the TXF.
901 	 * Add a security margin of 256 for the TX command + headers.
902 	 * We also want to have the start of the next packet inside the
903 	 * fifo to be able to send bursts.
904 	 */
905 	val = mvmsta->max_amsdu_len;
906 
907 	if (hweight16(sta->valid_links) <= 1) {
908 		if (sta->valid_links) {
909 			struct ieee80211_bss_conf *link_conf;
910 			unsigned int link = ffs(sta->valid_links) - 1;
911 
912 			rcu_read_lock();
913 			link_conf = rcu_dereference(mvmsta->vif->link_conf[link]);
914 			if (WARN_ON(!link_conf))
915 				band = NL80211_BAND_2GHZ;
916 			else
917 				band = link_conf->chanreq.oper.chan->band;
918 			rcu_read_unlock();
919 		} else {
920 			band = mvmsta->vif->bss_conf.chanreq.oper.chan->band;
921 		}
922 
923 		lmac = iwl_mvm_get_lmac_id(mvm, band);
924 	} else if (fw_has_capa(&mvm->fw->ucode_capa,
925 			       IWL_UCODE_TLV_CAPA_CDB_SUPPORT)) {
926 		/* for real MLO restrict to both LMACs if they exist */
927 		lmac = IWL_LMAC_5G_INDEX;
928 		val = min_t(unsigned int, val,
929 			    mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
930 		lmac = IWL_LMAC_24G_INDEX;
931 	} else {
932 		lmac = IWL_LMAC_24G_INDEX;
933 	}
934 
935 	return min_t(unsigned int, val,
936 		     mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
937 }
938 
939 #ifdef CONFIG_INET
940 
941 static int
942 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
943 		       netdev_features_t netdev_flags,
944 		       struct sk_buff_head *mpdus_skb)
945 {
946 	struct sk_buff *tmp, *next;
947 	struct ieee80211_hdr *hdr = (void *)skb->data;
948 	char cb[sizeof(skb->cb)];
949 	u16 i = 0;
950 	unsigned int tcp_payload_len;
951 	unsigned int mss = skb_shinfo(skb)->gso_size;
952 	bool ipv4 = (skb->protocol == htons(ETH_P_IP));
953 	bool qos = ieee80211_is_data_qos(hdr->frame_control);
954 	u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
955 
956 	skb_shinfo(skb)->gso_size = num_subframes * mss;
957 	memcpy(cb, skb->cb, sizeof(cb));
958 
959 	next = skb_gso_segment(skb, netdev_flags);
960 	skb_shinfo(skb)->gso_size = mss;
961 	skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
962 
963 	if (IS_ERR(next) && PTR_ERR(next) == -ENOMEM)
964 		return -ENOMEM;
965 
966 	if (WARN_ONCE(IS_ERR(next),
967 		      "skb_gso_segment error: %d\n", (int)PTR_ERR(next)))
968 		return PTR_ERR(next);
969 
970 	if (next)
971 		consume_skb(skb);
972 
973 	skb_list_walk_safe(next, tmp, next) {
974 		memcpy(tmp->cb, cb, sizeof(tmp->cb));
975 		/*
976 		 * Compute the length of all the data added for the A-MSDU.
977 		 * This will be used to compute the length to write in the TX
978 		 * command. We have: SNAP + IP + TCP for n -1 subframes and
979 		 * ETH header for n subframes.
980 		 */
981 		tcp_payload_len = skb_tail_pointer(tmp) -
982 			skb_transport_header(tmp) -
983 			tcp_hdrlen(tmp) + tmp->data_len;
984 
985 		if (ipv4)
986 			ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
987 
988 		if (tcp_payload_len > mss) {
989 			skb_shinfo(tmp)->gso_size = mss;
990 			skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 :
991 							   SKB_GSO_TCPV6;
992 		} else {
993 			if (qos) {
994 				u8 *qc;
995 
996 				if (ipv4)
997 					ip_send_check(ip_hdr(tmp));
998 
999 				qc = ieee80211_get_qos_ctl((void *)tmp->data);
1000 				*qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1001 			}
1002 			skb_shinfo(tmp)->gso_size = 0;
1003 		}
1004 
1005 		skb_mark_not_on_list(tmp);
1006 		__skb_queue_tail(mpdus_skb, tmp);
1007 		i++;
1008 	}
1009 
1010 	return 0;
1011 }
1012 
1013 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
1014 			  struct ieee80211_tx_info *info,
1015 			  struct ieee80211_sta *sta,
1016 			  struct sk_buff_head *mpdus_skb)
1017 {
1018 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1019 	struct ieee80211_hdr *hdr = (void *)skb->data;
1020 	unsigned int mss = skb_shinfo(skb)->gso_size;
1021 	unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
1022 	u16 snap_ip_tcp, pad;
1023 	netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
1024 	u8 tid;
1025 
1026 	snap_ip_tcp = 8 + skb_network_header_len(skb) + tcp_hdrlen(skb);
1027 
1028 	if (!mvmsta->max_amsdu_len ||
1029 	    !ieee80211_is_data_qos(hdr->frame_control) ||
1030 	    !mvmsta->amsdu_enabled)
1031 		return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
1032 
1033 	/*
1034 	 * Do not build AMSDU for IPv6 with extension headers.
1035 	 * ask stack to segment and checkum the generated MPDUs for us.
1036 	 */
1037 	if (skb->protocol == htons(ETH_P_IPV6) &&
1038 	    ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
1039 	    IPPROTO_TCP) {
1040 		netdev_flags &= ~NETIF_F_CSUM_MASK;
1041 		return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
1042 	}
1043 
1044 	tid = ieee80211_get_tid(hdr);
1045 	if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
1046 		return -EINVAL;
1047 
1048 	/*
1049 	 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
1050 	 * during an BA session.
1051 	 */
1052 	if ((info->flags & IEEE80211_TX_CTL_AMPDU &&
1053 	     !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) ||
1054 	    !(mvmsta->amsdu_enabled & BIT(tid)))
1055 		return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
1056 
1057 	/*
1058 	 * Take the min of ieee80211 station and mvm station
1059 	 */
1060 	max_amsdu_len =
1061 		min_t(unsigned int, sta->cur->max_amsdu_len,
1062 		      iwl_mvm_max_amsdu_size(mvm, sta, tid));
1063 
1064 	/*
1065 	 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
1066 	 * supported. This is a spec requirement (IEEE 802.11-2015
1067 	 * section 8.7.3 NOTE 3).
1068 	 */
1069 	if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1070 	    !sta->deflink.vht_cap.vht_supported)
1071 		max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
1072 
1073 	/* Sub frame header + SNAP + IP header + TCP header + MSS */
1074 	subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
1075 	pad = (4 - subf_len) & 0x3;
1076 
1077 	/*
1078 	 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
1079 	 * N * subf_len + (N - 1) * pad.
1080 	 */
1081 	num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
1082 
1083 	if (sta->max_amsdu_subframes &&
1084 	    num_subframes > sta->max_amsdu_subframes)
1085 		num_subframes = sta->max_amsdu_subframes;
1086 
1087 	tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1088 		tcp_hdrlen(skb) + skb->data_len;
1089 
1090 	/*
1091 	 * Make sure we have enough TBs for the A-MSDU:
1092 	 *	2 for each subframe
1093 	 *	1 more for each fragment
1094 	 *	1 more for the potential data in the header
1095 	 */
1096 	if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
1097 	    mvm->trans->max_skb_frags)
1098 		num_subframes = 1;
1099 
1100 	if (num_subframes > 1)
1101 		*ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1102 
1103 	/* This skb fits in one single A-MSDU */
1104 	if (num_subframes * mss >= tcp_payload_len) {
1105 		__skb_queue_tail(mpdus_skb, skb);
1106 		return 0;
1107 	}
1108 
1109 	/*
1110 	 * Trick the segmentation function to make it
1111 	 * create SKBs that can fit into one A-MSDU.
1112 	 */
1113 	return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags,
1114 				      mpdus_skb);
1115 }
1116 #else /* CONFIG_INET */
1117 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
1118 			  struct ieee80211_tx_info *info,
1119 			  struct ieee80211_sta *sta,
1120 			  struct sk_buff_head *mpdus_skb)
1121 {
1122 	/* Impossible to get TSO with CONFIG_INET */
1123 	WARN_ON(1);
1124 
1125 	return -1;
1126 }
1127 #endif
1128 
1129 /* Check if there are any timed-out TIDs on a given shared TXQ */
1130 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
1131 {
1132 	unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
1133 	unsigned long now = jiffies;
1134 	int tid;
1135 
1136 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1137 		return false;
1138 
1139 	for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1140 		if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
1141 				IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1142 			return true;
1143 	}
1144 
1145 	return false;
1146 }
1147 
1148 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
1149 			       struct iwl_mvm_sta *mvmsta,
1150 			       int airtime)
1151 {
1152 	int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1153 	struct iwl_mvm_tcm_mac *mdata;
1154 
1155 	if (mac >= NUM_MAC_INDEX_DRIVER)
1156 		return;
1157 
1158 	mdata = &mvm->tcm.data[mac];
1159 
1160 	if (mvm->tcm.paused)
1161 		return;
1162 
1163 	if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1164 		schedule_delayed_work(&mvm->tcm.work, 0);
1165 
1166 	mdata->tx.airtime += airtime;
1167 }
1168 
1169 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
1170 				 struct iwl_mvm_sta *mvmsta, int tid)
1171 {
1172 	u32 ac = tid_to_mac80211_ac[tid];
1173 	int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1174 	struct iwl_mvm_tcm_mac *mdata;
1175 
1176 	if (mac >= NUM_MAC_INDEX_DRIVER)
1177 		return -EINVAL;
1178 
1179 	mdata = &mvm->tcm.data[mac];
1180 
1181 	mdata->tx.pkts[ac]++;
1182 
1183 	return 0;
1184 }
1185 
1186 /*
1187  * Sets the fields in the Tx cmd that are crypto related.
1188  *
1189  * This function must be called with BHs disabled.
1190  */
1191 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
1192 			   struct ieee80211_tx_info *info,
1193 			   struct ieee80211_sta *sta,
1194 			   const u8 *addr3_override)
1195 {
1196 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1197 	struct iwl_mvm_sta *mvmsta;
1198 	struct iwl_device_tx_cmd *dev_cmd;
1199 	__le16 fc;
1200 	u16 seq_number = 0;
1201 	u8 tid = IWL_MAX_TID_COUNT;
1202 	u16 txq_id;
1203 	bool is_ampdu = false;
1204 	int hdrlen;
1205 
1206 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
1207 	fc = hdr->frame_control;
1208 	hdrlen = ieee80211_hdrlen(fc);
1209 
1210 	if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
1211 		return -1;
1212 
1213 	if (WARN_ON_ONCE(!mvmsta))
1214 		return -1;
1215 
1216 	if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA))
1217 		return -1;
1218 
1219 	if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he)
1220 		return -1;
1221 
1222 	if (unlikely(ieee80211_is_probe_resp(fc)))
1223 		iwl_mvm_probe_resp_set_noa(mvm, skb);
1224 
1225 	dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1226 					sta, mvmsta->deflink.sta_id,
1227 					addr3_override);
1228 	if (!dev_cmd)
1229 		goto drop;
1230 
1231 	/*
1232 	 * we handle that entirely ourselves -- for uAPSD the firmware
1233 	 * will always send a notification, and for PS-Poll responses
1234 	 * we'll notify mac80211 when getting frame status
1235 	 */
1236 	info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1237 
1238 	spin_lock(&mvmsta->lock);
1239 
1240 	/* nullfunc frames should go to the MGMT queue regardless of QOS,
1241 	 * the conditions of !ieee80211_is_qos_nullfunc(fc) and
1242 	 * !ieee80211_is_data_qos(fc) keep the default assignment of MGMT TID
1243 	 */
1244 	if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1245 		tid = ieee80211_get_tid(hdr);
1246 		if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid))
1247 			goto drop_unlock_sta;
1248 
1249 		is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1250 		if (WARN_ONCE(is_ampdu &&
1251 			      mvmsta->tid_data[tid].state != IWL_AGG_ON,
1252 			      "Invalid internal agg state %d for TID %d",
1253 			       mvmsta->tid_data[tid].state, tid))
1254 			goto drop_unlock_sta;
1255 
1256 		seq_number = mvmsta->tid_data[tid].seq_number;
1257 		seq_number &= IEEE80211_SCTL_SEQ;
1258 
1259 		if (!iwl_mvm_has_new_tx_api(mvm)) {
1260 			struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1261 
1262 			hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1263 			hdr->seq_ctrl |= cpu_to_le16(seq_number);
1264 			/* update the tx_cmd hdr as it was already copied */
1265 			tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1266 		}
1267 	} else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc) &&
1268 		   !ieee80211_is_nullfunc(fc)) {
1269 		tid = IWL_TID_NON_QOS;
1270 	}
1271 
1272 	txq_id = mvmsta->tid_data[tid].txq_id;
1273 
1274 	WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1275 
1276 	if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) {
1277 		iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1278 		spin_unlock(&mvmsta->lock);
1279 		return -1;
1280 	}
1281 
1282 	if (!iwl_mvm_has_new_tx_api(mvm)) {
1283 		/* Keep track of the time of the last frame for this RA/TID */
1284 		mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1285 
1286 		/*
1287 		 * If we have timed-out TIDs - schedule the worker that will
1288 		 * reconfig the queues and update them
1289 		 *
1290 		 * Note that the no lock is taken here in order to not serialize
1291 		 * the TX flow. This isn't dangerous because scheduling
1292 		 * mvm->add_stream_wk can't ruin the state, and if we DON'T
1293 		 * schedule it due to some race condition then next TX we get
1294 		 * here we will.
1295 		 */
1296 		if (unlikely(mvm->queue_info[txq_id].status ==
1297 			     IWL_MVM_QUEUE_SHARED &&
1298 			     iwl_mvm_txq_should_update(mvm, txq_id)))
1299 			schedule_work(&mvm->add_stream_wk);
1300 	}
1301 
1302 	IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n",
1303 		     mvmsta->deflink.sta_id, tid, txq_id,
1304 		     IEEE80211_SEQ_TO_SN(seq_number), skb->len);
1305 
1306 	/* From now on, we cannot access info->control */
1307 	iwl_mvm_skb_prepare_status(skb, dev_cmd);
1308 
1309 	/*
1310 	 * The IV is introduced by the HW for new tx api, and it is not present
1311 	 * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the
1312 	 * IV for those devices.
1313 	 */
1314 	if (ieee80211_is_data(fc))
1315 		iwl_mvm_mei_tx_copy_to_csme(mvm, skb,
1316 					    info->control.hw_key &&
1317 					    !iwl_mvm_has_new_tx_api(mvm) ?
1318 					    info->control.hw_key->iv_len : 0);
1319 
1320 	if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1321 		goto drop_unlock_sta;
1322 
1323 	if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1324 		mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1325 
1326 	spin_unlock(&mvmsta->lock);
1327 
1328 	if (iwl_mvm_tx_pkt_queued(mvm, mvmsta,
1329 				  tid == IWL_MAX_TID_COUNT ? 0 : tid))
1330 		goto drop;
1331 
1332 	return 0;
1333 
1334 drop_unlock_sta:
1335 	iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1336 	spin_unlock(&mvmsta->lock);
1337 drop:
1338 	IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->deflink.sta_id,
1339 		     tid);
1340 	return -1;
1341 }
1342 
1343 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb,
1344 		       struct ieee80211_sta *sta)
1345 {
1346 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1347 	struct ieee80211_tx_info info;
1348 	struct sk_buff_head mpdus_skbs;
1349 	struct ieee80211_vif *vif;
1350 	unsigned int payload_len;
1351 	int ret;
1352 	struct sk_buff *orig_skb = skb;
1353 	const u8 *addr3;
1354 
1355 	if (WARN_ON_ONCE(!mvmsta))
1356 		return -1;
1357 
1358 	if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA))
1359 		return -1;
1360 
1361 	memcpy(&info, skb->cb, sizeof(info));
1362 
1363 	if (!skb_is_gso(skb))
1364 		return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL);
1365 
1366 	payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1367 		tcp_hdrlen(skb) + skb->data_len;
1368 
1369 	if (payload_len <= skb_shinfo(skb)->gso_size)
1370 		return iwl_mvm_tx_mpdu(mvm, skb, &info, sta, NULL);
1371 
1372 	__skb_queue_head_init(&mpdus_skbs);
1373 
1374 	vif = info.control.vif;
1375 	if (!vif)
1376 		return -1;
1377 
1378 	ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1379 	if (ret)
1380 		return ret;
1381 
1382 	WARN_ON(skb_queue_empty(&mpdus_skbs));
1383 
1384 	/*
1385 	 * As described in IEEE sta 802.11-2020, table 9-30 (Address
1386 	 * field contents), A-MSDU address 3 should contain the BSSID
1387 	 * address.
1388 	 * Pass address 3 down to iwl_mvm_tx_mpdu() and further to set it
1389 	 * in the command header. We need to preserve the original
1390 	 * address 3 in the skb header to correctly create all the
1391 	 * A-MSDU subframe headers from it.
1392 	 */
1393 	switch (vif->type) {
1394 	case NL80211_IFTYPE_STATION:
1395 		addr3 = vif->cfg.ap_addr;
1396 		break;
1397 	case NL80211_IFTYPE_AP:
1398 		addr3 = vif->addr;
1399 		break;
1400 	default:
1401 		addr3 = NULL;
1402 		break;
1403 	}
1404 
1405 	while (!skb_queue_empty(&mpdus_skbs)) {
1406 		struct ieee80211_hdr *hdr;
1407 		bool amsdu;
1408 
1409 		skb = __skb_dequeue(&mpdus_skbs);
1410 		hdr = (void *)skb->data;
1411 		amsdu = ieee80211_is_data_qos(hdr->frame_control) &&
1412 			(*ieee80211_get_qos_ctl(hdr) &
1413 			 IEEE80211_QOS_CTL_A_MSDU_PRESENT);
1414 
1415 		ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta,
1416 				      amsdu ? addr3 : NULL);
1417 		if (ret) {
1418 			/* Free skbs created as part of TSO logic that have not yet been dequeued */
1419 			__skb_queue_purge(&mpdus_skbs);
1420 			/* skb here is not necessarily same as skb that entered this method,
1421 			 * so free it explicitly.
1422 			 */
1423 			if (skb == orig_skb)
1424 				ieee80211_free_txskb(mvm->hw, skb);
1425 			else
1426 				kfree_skb(skb);
1427 			/* there was error, but we consumed skb one way or another, so return 0 */
1428 			return 0;
1429 		}
1430 	}
1431 
1432 	return 0;
1433 }
1434 
1435 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1436 				      struct ieee80211_sta *sta, u8 tid)
1437 {
1438 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1439 	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1440 	struct ieee80211_vif *vif = mvmsta->vif;
1441 	u16 normalized_ssn;
1442 
1443 	lockdep_assert_held(&mvmsta->lock);
1444 
1445 	if ((tid_data->state == IWL_AGG_ON ||
1446 	     tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1447 	    iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1448 		/*
1449 		 * Now that this aggregation or DQA queue is empty tell
1450 		 * mac80211 so it knows we no longer have frames buffered for
1451 		 * the station on this TID (for the TIM bitmap calculation.)
1452 		 */
1453 		ieee80211_sta_set_buffered(sta, tid, false);
1454 	}
1455 
1456 	/*
1457 	 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1458 	 * to align the wrap around of ssn so we compare relevant values.
1459 	 */
1460 	normalized_ssn = tid_data->ssn;
1461 	if (mvm->trans->trans_cfg->gen2)
1462 		normalized_ssn &= 0xff;
1463 
1464 	if (normalized_ssn != tid_data->next_reclaimed)
1465 		return;
1466 
1467 	switch (tid_data->state) {
1468 	case IWL_EMPTYING_HW_QUEUE_ADDBA:
1469 		IWL_DEBUG_TX_QUEUES(mvm,
1470 				    "Can continue addBA flow ssn = next_recl = %d\n",
1471 				    tid_data->next_reclaimed);
1472 		tid_data->state = IWL_AGG_STARTING;
1473 		ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1474 		break;
1475 
1476 	case IWL_EMPTYING_HW_QUEUE_DELBA:
1477 		IWL_DEBUG_TX_QUEUES(mvm,
1478 				    "Can continue DELBA flow ssn = next_recl = %d\n",
1479 				    tid_data->next_reclaimed);
1480 		tid_data->state = IWL_AGG_OFF;
1481 		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1482 		break;
1483 
1484 	default:
1485 		break;
1486 	}
1487 }
1488 
1489 #ifdef CONFIG_IWLWIFI_DEBUG
1490 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1491 {
1492 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1493 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1494 
1495 	switch (status & TX_STATUS_MSK) {
1496 	case TX_STATUS_SUCCESS:
1497 		return "SUCCESS";
1498 	TX_STATUS_POSTPONE(DELAY);
1499 	TX_STATUS_POSTPONE(FEW_BYTES);
1500 	TX_STATUS_POSTPONE(BT_PRIO);
1501 	TX_STATUS_POSTPONE(QUIET_PERIOD);
1502 	TX_STATUS_POSTPONE(CALC_TTAK);
1503 	TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1504 	TX_STATUS_FAIL(SHORT_LIMIT);
1505 	TX_STATUS_FAIL(LONG_LIMIT);
1506 	TX_STATUS_FAIL(UNDERRUN);
1507 	TX_STATUS_FAIL(DRAIN_FLOW);
1508 	TX_STATUS_FAIL(RFKILL_FLUSH);
1509 	TX_STATUS_FAIL(LIFE_EXPIRE);
1510 	TX_STATUS_FAIL(DEST_PS);
1511 	TX_STATUS_FAIL(HOST_ABORTED);
1512 	TX_STATUS_FAIL(BT_RETRY);
1513 	TX_STATUS_FAIL(STA_INVALID);
1514 	TX_STATUS_FAIL(FRAG_DROPPED);
1515 	TX_STATUS_FAIL(TID_DISABLE);
1516 	TX_STATUS_FAIL(FIFO_FLUSHED);
1517 	TX_STATUS_FAIL(SMALL_CF_POLL);
1518 	TX_STATUS_FAIL(FW_DROP);
1519 	TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1520 	}
1521 
1522 	return "UNKNOWN";
1523 
1524 #undef TX_STATUS_FAIL
1525 #undef TX_STATUS_POSTPONE
1526 }
1527 #endif /* CONFIG_IWLWIFI_DEBUG */
1528 
1529 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width)
1530 {
1531 	switch (chan_width) {
1532 	case RATE_MCS_CHAN_WIDTH_20:
1533 		return 0;
1534 	case RATE_MCS_CHAN_WIDTH_40:
1535 		return IEEE80211_TX_RC_40_MHZ_WIDTH;
1536 	case RATE_MCS_CHAN_WIDTH_80:
1537 		return IEEE80211_TX_RC_80_MHZ_WIDTH;
1538 	case RATE_MCS_CHAN_WIDTH_160:
1539 		return IEEE80211_TX_RC_160_MHZ_WIDTH;
1540 	default:
1541 		return 0;
1542 	}
1543 }
1544 
1545 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1546 			       enum nl80211_band band,
1547 			       struct ieee80211_tx_rate *r)
1548 {
1549 	u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK;
1550 	u32 rate = format == RATE_MCS_HT_MSK ?
1551 		RATE_HT_MCS_INDEX(rate_n_flags) :
1552 		rate_n_flags & RATE_MCS_CODE_MSK;
1553 
1554 	r->flags |=
1555 		iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1556 					      RATE_MCS_CHAN_WIDTH_MSK);
1557 
1558 	if (rate_n_flags & RATE_MCS_SGI_MSK)
1559 		r->flags |= IEEE80211_TX_RC_SHORT_GI;
1560 	if (format ==  RATE_MCS_HT_MSK) {
1561 		r->flags |= IEEE80211_TX_RC_MCS;
1562 		r->idx = rate;
1563 	} else if (format ==  RATE_MCS_VHT_MSK) {
1564 		ieee80211_rate_set_vht(r, rate,
1565 				       FIELD_GET(RATE_MCS_NSS_MSK,
1566 						 rate_n_flags) + 1);
1567 		r->flags |= IEEE80211_TX_RC_VHT_MCS;
1568 	} else if (format == RATE_MCS_HE_MSK) {
1569 		/* mac80211 cannot do this without ieee80211_tx_status_ext()
1570 		 * but it only matters for radiotap */
1571 		r->idx = 0;
1572 	} else {
1573 		r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags,
1574 							       band);
1575 	}
1576 }
1577 
1578 void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags,
1579 				  enum nl80211_band band,
1580 				  struct ieee80211_tx_rate *r)
1581 {
1582 	if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1583 		r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1584 
1585 	r->flags |=
1586 		iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1587 					      RATE_MCS_CHAN_WIDTH_MSK_V1);
1588 
1589 	if (rate_n_flags & RATE_MCS_SGI_MSK_V1)
1590 		r->flags |= IEEE80211_TX_RC_SHORT_GI;
1591 	if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
1592 		r->flags |= IEEE80211_TX_RC_MCS;
1593 		r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1;
1594 	} else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) {
1595 		ieee80211_rate_set_vht(
1596 			r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1597 			FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags) + 1);
1598 		r->flags |= IEEE80211_TX_RC_VHT_MCS;
1599 	} else {
1600 		r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1601 							     band);
1602 	}
1603 }
1604 
1605 /*
1606  * translate ucode response to mac80211 tx status control values
1607  */
1608 static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw,
1609 					u32 rate_n_flags,
1610 					struct ieee80211_tx_info *info)
1611 {
1612 	struct ieee80211_tx_rate *r = &info->status.rates[0];
1613 
1614 	if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP,
1615 				    TX_CMD, 0) <= 6)
1616 		rate_n_flags = iwl_new_rate_from_v1(rate_n_flags);
1617 
1618 	info->status.antenna =
1619 		((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS);
1620 	iwl_mvm_hwrate_to_tx_rate(rate_n_flags,
1621 				  info->band, r);
1622 }
1623 
1624 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1625 					    u32 status, __le16 frame_control)
1626 {
1627 	struct iwl_fw_dbg_trigger_tlv *trig;
1628 	struct iwl_fw_dbg_trigger_tx_status *status_trig;
1629 	int i;
1630 
1631 	if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) {
1632 		enum iwl_fw_ini_time_point tp =
1633 			IWL_FW_INI_TIME_POINT_TX_FAILED;
1634 
1635 		if (ieee80211_is_action(frame_control))
1636 			tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED;
1637 
1638 		iwl_dbg_tlv_time_point(&mvm->fwrt,
1639 				       tp, NULL);
1640 		return;
1641 	}
1642 
1643 	trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
1644 				     FW_DBG_TRIGGER_TX_STATUS);
1645 	if (!trig)
1646 		return;
1647 
1648 	status_trig = (void *)trig->data;
1649 
1650 	for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1651 		/* don't collect on status 0 */
1652 		if (!status_trig->statuses[i].status)
1653 			break;
1654 
1655 		if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1656 			continue;
1657 
1658 		iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1659 					"Tx status %d was received",
1660 					status & TX_STATUS_MSK);
1661 		break;
1662 	}
1663 }
1664 
1665 /*
1666  * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1667  * @tx_resp: the Tx response from the fw (agg or non-agg)
1668  *
1669  * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1670  * it can't know that everything will go well until the end of the AMPDU, it
1671  * can't know in advance the number of MPDUs that will be sent in the current
1672  * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1673  * Hence, it can't know in advance what the SSN of the SCD will be at the end
1674  * of the batch. This is why the SSN of the SCD is written at the end of the
1675  * whole struct at a variable offset. This function knows how to cope with the
1676  * variable offset and returns the SSN of the SCD.
1677  *
1678  * For 22000-series and lower, this is just 12 bits. For later, 16 bits.
1679  */
1680 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1681 				      struct iwl_mvm_tx_resp *tx_resp)
1682 {
1683 	u32 val = le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1684 			       tx_resp->frame_count);
1685 
1686 	if (mvm->trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210)
1687 		return val & 0xFFFF;
1688 	return val & 0xFFF;
1689 }
1690 
1691 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1692 				     struct iwl_rx_packet *pkt)
1693 {
1694 	struct ieee80211_sta *sta;
1695 	u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1696 	int txq_id = SEQ_TO_QUEUE(sequence);
1697 	/* struct iwl_mvm_tx_resp_v3 is almost the same */
1698 	struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1699 	int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1700 	int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1701 	struct agg_tx_status *agg_status =
1702 		iwl_mvm_get_agg_status(mvm, tx_resp);
1703 	u32 status = le16_to_cpu(agg_status->status);
1704 	u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1705 	struct sk_buff_head skbs;
1706 	u8 skb_freed = 0;
1707 	u8 lq_color;
1708 	u16 next_reclaimed, seq_ctl;
1709 	bool is_ndp = false;
1710 
1711 	__skb_queue_head_init(&skbs);
1712 
1713 	if (iwl_mvm_has_new_tx_api(mvm))
1714 		txq_id = le16_to_cpu(tx_resp->tx_queue);
1715 
1716 	seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1717 
1718 	/* we can free until ssn % q.n_bd not inclusive */
1719 	iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs, false);
1720 
1721 	while (!skb_queue_empty(&skbs)) {
1722 		struct sk_buff *skb = __skb_dequeue(&skbs);
1723 		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1724 		struct ieee80211_hdr *hdr = (void *)skb->data;
1725 		bool flushed = false;
1726 
1727 		skb_freed++;
1728 
1729 		iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1730 
1731 		memset(&info->status, 0, sizeof(info->status));
1732 		info->flags &= ~(IEEE80211_TX_STAT_ACK | IEEE80211_TX_STAT_TX_FILTERED);
1733 
1734 		/* inform mac80211 about what happened with the frame */
1735 		switch (status & TX_STATUS_MSK) {
1736 		case TX_STATUS_SUCCESS:
1737 		case TX_STATUS_DIRECT_DONE:
1738 			info->flags |= IEEE80211_TX_STAT_ACK;
1739 			break;
1740 		case TX_STATUS_FAIL_FIFO_FLUSHED:
1741 		case TX_STATUS_FAIL_DRAIN_FLOW:
1742 			flushed = true;
1743 			break;
1744 		case TX_STATUS_FAIL_DEST_PS:
1745 			/* the FW should have stopped the queue and not
1746 			 * return this status
1747 			 */
1748 			IWL_ERR_LIMIT(mvm,
1749 				      "FW reported TX filtered, status=0x%x, FC=0x%x\n",
1750 				      status, le16_to_cpu(hdr->frame_control));
1751 			info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1752 			break;
1753 		default:
1754 			break;
1755 		}
1756 
1757 		if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1758 		    ieee80211_is_mgmt(hdr->frame_control))
1759 			iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
1760 
1761 		/*
1762 		 * If we are freeing multiple frames, mark all the frames
1763 		 * but the first one as acked, since they were acknowledged
1764 		 * before
1765 		 * */
1766 		if (skb_freed > 1)
1767 			info->flags |= IEEE80211_TX_STAT_ACK;
1768 
1769 		iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control);
1770 
1771 		info->status.rates[0].count = tx_resp->failure_frame + 1;
1772 
1773 		iwl_mvm_hwrate_to_tx_status(mvm->fw,
1774 					    le32_to_cpu(tx_resp->initial_rate),
1775 					    info);
1776 
1777 		/* Don't assign the converted initial_rate, because driver
1778 		 * TLC uses this and doesn't support the new FW rate
1779 		 */
1780 		info->status.status_driver_data[1] =
1781 			(void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1782 
1783 		/* Single frame failure in an AMPDU queue => send BAR */
1784 		if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1785 		    !(info->flags & IEEE80211_TX_STAT_ACK) &&
1786 		    !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1787 			info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1788 		info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1789 
1790 		/* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1791 		if (ieee80211_is_back_req(hdr->frame_control))
1792 			seq_ctl = 0;
1793 		else if (status != TX_STATUS_SUCCESS)
1794 			seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1795 
1796 		if (unlikely(!seq_ctl)) {
1797 			/*
1798 			 * If it is an NDP, we can't update next_reclaim since
1799 			 * its sequence control is 0. Note that for that same
1800 			 * reason, NDPs are never sent to A-MPDU'able queues
1801 			 * so that we can never have more than one freed frame
1802 			 * for a single Tx resonse (see WARN_ON below).
1803 			 */
1804 			if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1805 				is_ndp = true;
1806 		}
1807 
1808 		/*
1809 		 * TODO: this is not accurate if we are freeing more than one
1810 		 * packet.
1811 		 */
1812 		info->status.tx_time =
1813 			le16_to_cpu(tx_resp->wireless_media_time);
1814 		BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1815 		lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1816 		info->status.status_driver_data[0] =
1817 			RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1818 
1819 		if (likely(!iwl_mvm_time_sync_frame(mvm, skb, hdr->addr1)))
1820 			ieee80211_tx_status_skb(mvm->hw, skb);
1821 	}
1822 
1823 	/* This is an aggregation queue or might become one, so we use
1824 	 * the ssn since: ssn = wifi seq_num % 256.
1825 	 * The seq_ctl is the sequence control of the packet to which
1826 	 * this Tx response relates. But if there is a hole in the
1827 	 * bitmap of the BA we received, this Tx response may allow to
1828 	 * reclaim the hole and all the subsequent packets that were
1829 	 * already acked. In that case, seq_ctl != ssn, and the next
1830 	 * packet to be reclaimed will be ssn and not seq_ctl. In that
1831 	 * case, several packets will be reclaimed even if
1832 	 * frame_count = 1.
1833 	 *
1834 	 * The ssn is the index (% 256) of the latest packet that has
1835 	 * treated (acked / dropped) + 1.
1836 	 */
1837 	next_reclaimed = ssn;
1838 
1839 	IWL_DEBUG_TX_REPLY(mvm,
1840 			   "TXQ %d status %s (0x%08x)\n",
1841 			   txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1842 
1843 	IWL_DEBUG_TX_REPLY(mvm,
1844 			   "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1845 			   le32_to_cpu(tx_resp->initial_rate),
1846 			   tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1847 			   ssn, next_reclaimed, seq_ctl);
1848 
1849 	rcu_read_lock();
1850 
1851 	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1852 	/*
1853 	 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1854 	 * the firmware while we still have packets for it in the Tx queues.
1855 	 */
1856 	if (WARN_ON_ONCE(!sta))
1857 		goto out;
1858 
1859 	if (!IS_ERR(sta)) {
1860 		struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1861 
1862 		iwl_mvm_tx_airtime(mvm, mvmsta,
1863 				   le16_to_cpu(tx_resp->wireless_media_time));
1864 
1865 		if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1866 		    mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
1867 			iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
1868 
1869 		if (sta->wme && tid != IWL_MGMT_TID) {
1870 			struct iwl_mvm_tid_data *tid_data =
1871 				&mvmsta->tid_data[tid];
1872 			bool send_eosp_ndp = false;
1873 
1874 			spin_lock_bh(&mvmsta->lock);
1875 
1876 			if (!is_ndp) {
1877 				tid_data->next_reclaimed = next_reclaimed;
1878 				IWL_DEBUG_TX_REPLY(mvm,
1879 						   "Next reclaimed packet:%d\n",
1880 						   next_reclaimed);
1881 				iwl_mvm_count_mpdu(mvmsta, sta_id, 1, true, 0);
1882 			} else {
1883 				IWL_DEBUG_TX_REPLY(mvm,
1884 						   "NDP - don't update next_reclaimed\n");
1885 			}
1886 
1887 			iwl_mvm_check_ratid_empty(mvm, sta, tid);
1888 
1889 			if (mvmsta->sleep_tx_count) {
1890 				mvmsta->sleep_tx_count--;
1891 				if (mvmsta->sleep_tx_count &&
1892 				    !iwl_mvm_tid_queued(mvm, tid_data)) {
1893 					/*
1894 					 * The number of frames in the queue
1895 					 * dropped to 0 even if we sent less
1896 					 * frames than we thought we had on the
1897 					 * Tx queue.
1898 					 * This means we had holes in the BA
1899 					 * window that we just filled, ask
1900 					 * mac80211 to send EOSP since the
1901 					 * firmware won't know how to do that.
1902 					 * Send NDP and the firmware will send
1903 					 * EOSP notification that will trigger
1904 					 * a call to ieee80211_sta_eosp().
1905 					 */
1906 					send_eosp_ndp = true;
1907 				}
1908 			}
1909 
1910 			spin_unlock_bh(&mvmsta->lock);
1911 			if (send_eosp_ndp) {
1912 				iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1913 					IEEE80211_FRAME_RELEASE_UAPSD,
1914 					1, tid, false, false);
1915 				mvmsta->sleep_tx_count = 0;
1916 				ieee80211_send_eosp_nullfunc(sta, tid);
1917 			}
1918 		}
1919 
1920 		if (mvmsta->next_status_eosp) {
1921 			mvmsta->next_status_eosp = false;
1922 			ieee80211_sta_eosp(sta);
1923 		}
1924 	}
1925 out:
1926 	rcu_read_unlock();
1927 }
1928 
1929 #ifdef CONFIG_IWLWIFI_DEBUG
1930 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1931 static const char *iwl_get_agg_tx_status(u16 status)
1932 {
1933 	switch (status & AGG_TX_STATE_STATUS_MSK) {
1934 	AGG_TX_STATE_(TRANSMITTED);
1935 	AGG_TX_STATE_(UNDERRUN);
1936 	AGG_TX_STATE_(BT_PRIO);
1937 	AGG_TX_STATE_(FEW_BYTES);
1938 	AGG_TX_STATE_(ABORT);
1939 	AGG_TX_STATE_(TX_ON_AIR_DROP);
1940 	AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1941 	AGG_TX_STATE_(LAST_SENT_BT_KILL);
1942 	AGG_TX_STATE_(SCD_QUERY);
1943 	AGG_TX_STATE_(TEST_BAD_CRC32);
1944 	AGG_TX_STATE_(RESPONSE);
1945 	AGG_TX_STATE_(DUMP_TX);
1946 	AGG_TX_STATE_(DELAY_TX);
1947 	}
1948 
1949 	return "UNKNOWN";
1950 }
1951 
1952 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1953 				      struct iwl_rx_packet *pkt)
1954 {
1955 	struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1956 	struct agg_tx_status *frame_status =
1957 		iwl_mvm_get_agg_status(mvm, tx_resp);
1958 	int i;
1959 	bool tirgger_timepoint = false;
1960 
1961 	for (i = 0; i < tx_resp->frame_count; i++) {
1962 		u16 fstatus = le16_to_cpu(frame_status[i].status);
1963 		/* In case one frame wasn't transmitted trigger time point */
1964 		tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) !=
1965 				      AGG_TX_STATE_TRANSMITTED);
1966 		IWL_DEBUG_TX_REPLY(mvm,
1967 				   "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1968 				   iwl_get_agg_tx_status(fstatus),
1969 				   fstatus & AGG_TX_STATE_STATUS_MSK,
1970 				   (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1971 					AGG_TX_STATE_TRY_CNT_POS,
1972 				   le16_to_cpu(frame_status[i].sequence));
1973 	}
1974 
1975 	if (tirgger_timepoint)
1976 		iwl_dbg_tlv_time_point(&mvm->fwrt,
1977 				       IWL_FW_INI_TIME_POINT_TX_FAILED, NULL);
1978 
1979 }
1980 #else
1981 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1982 				      struct iwl_rx_packet *pkt)
1983 {}
1984 #endif /* CONFIG_IWLWIFI_DEBUG */
1985 
1986 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1987 				  struct iwl_rx_packet *pkt)
1988 {
1989 	struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1990 	int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1991 	int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1992 	u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1993 	struct iwl_mvm_sta *mvmsta;
1994 	int queue = SEQ_TO_QUEUE(sequence);
1995 	struct ieee80211_sta *sta;
1996 
1997 	if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1998 			 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1999 		return;
2000 
2001 	iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
2002 
2003 	rcu_read_lock();
2004 
2005 	mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2006 
2007 	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
2008 	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta) || !sta->wme)) {
2009 		rcu_read_unlock();
2010 		return;
2011 	}
2012 
2013 	if (!WARN_ON_ONCE(!mvmsta)) {
2014 		mvmsta->tid_data[tid].rate_n_flags =
2015 			le32_to_cpu(tx_resp->initial_rate);
2016 		mvmsta->tid_data[tid].tx_time =
2017 			le16_to_cpu(tx_resp->wireless_media_time);
2018 		mvmsta->tid_data[tid].lq_color =
2019 			TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
2020 		iwl_mvm_tx_airtime(mvm, mvmsta,
2021 				   le16_to_cpu(tx_resp->wireless_media_time));
2022 	}
2023 
2024 	rcu_read_unlock();
2025 }
2026 
2027 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
2028 {
2029 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
2030 	struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
2031 
2032 	if (tx_resp->frame_count == 1)
2033 		iwl_mvm_rx_tx_cmd_single(mvm, pkt);
2034 	else
2035 		iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
2036 }
2037 
2038 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
2039 			       int txq, int index,
2040 			       struct ieee80211_tx_info *tx_info, u32 rate,
2041 			       bool is_flush)
2042 {
2043 	struct sk_buff_head reclaimed_skbs;
2044 	struct iwl_mvm_tid_data *tid_data = NULL;
2045 	struct ieee80211_sta *sta;
2046 	struct iwl_mvm_sta *mvmsta = NULL;
2047 	struct sk_buff *skb;
2048 	int freed;
2049 
2050 	if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations ||
2051 		      tid > IWL_MAX_TID_COUNT,
2052 		      "sta_id %d tid %d", sta_id, tid))
2053 		return;
2054 
2055 	rcu_read_lock();
2056 
2057 	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
2058 
2059 	/* Reclaiming frames for a station that has been deleted ? */
2060 	if (WARN_ON_ONCE(!sta)) {
2061 		rcu_read_unlock();
2062 		return;
2063 	}
2064 
2065 	__skb_queue_head_init(&reclaimed_skbs);
2066 
2067 	/*
2068 	 * Release all TFDs before the SSN, i.e. all TFDs in front of
2069 	 * block-ack window (we assume that they've been successfully
2070 	 * transmitted ... if not, it's too late anyway).
2071 	 */
2072 	iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs, is_flush);
2073 
2074 	skb_queue_walk(&reclaimed_skbs, skb) {
2075 		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2076 
2077 		iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
2078 
2079 		memset(&info->status, 0, sizeof(info->status));
2080 		/* Packet was transmitted successfully, failures come as single
2081 		 * frames because before failing a frame the firmware transmits
2082 		 * it without aggregation at least once.
2083 		 */
2084 		if (!is_flush)
2085 			info->flags |= IEEE80211_TX_STAT_ACK;
2086 		else
2087 			info->flags &= ~IEEE80211_TX_STAT_ACK;
2088 	}
2089 
2090 	/*
2091 	 * It's possible to get a BA response after invalidating the rcu (rcu is
2092 	 * invalidated in order to prevent new Tx from being sent, but there may
2093 	 * be some frames already in-flight).
2094 	 * In this case we just want to reclaim, and could skip all the
2095 	 * sta-dependent stuff since it's in the middle of being removed
2096 	 * anyways.
2097 	 */
2098 	if (IS_ERR(sta))
2099 		goto out;
2100 
2101 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
2102 	tid_data = &mvmsta->tid_data[tid];
2103 
2104 	if (tid_data->txq_id != txq) {
2105 		IWL_ERR(mvm,
2106 			"invalid reclaim request: Q %d, tid %d\n",
2107 			tid_data->txq_id, tid);
2108 		rcu_read_unlock();
2109 		return;
2110 	}
2111 
2112 	spin_lock_bh(&mvmsta->lock);
2113 
2114 	tid_data->next_reclaimed = index;
2115 
2116 	iwl_mvm_check_ratid_empty(mvm, sta, tid);
2117 
2118 	freed = 0;
2119 
2120 	/* pack lq color from tid_data along the reduced txp */
2121 	tx_info->status.status_driver_data[0] =
2122 		RS_DRV_DATA_PACK(tid_data->lq_color,
2123 				 tx_info->status.status_driver_data[0]);
2124 	tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
2125 
2126 	skb_queue_walk(&reclaimed_skbs, skb) {
2127 		struct ieee80211_hdr *hdr = (void *)skb->data;
2128 		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2129 
2130 		if (!is_flush) {
2131 			if (ieee80211_is_data_qos(hdr->frame_control))
2132 				freed++;
2133 			else
2134 				WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
2135 		}
2136 
2137 		/* this is the first skb we deliver in this batch */
2138 		/* put the rate scaling data there */
2139 		if (freed == 1) {
2140 			info->flags |= IEEE80211_TX_STAT_AMPDU;
2141 			memcpy(&info->status, &tx_info->status,
2142 			       sizeof(tx_info->status));
2143 			iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info);
2144 		}
2145 	}
2146 
2147 	spin_unlock_bh(&mvmsta->lock);
2148 
2149 	/* We got a BA notif with 0 acked or scd_ssn didn't progress which is
2150 	 * possible (i.e. first MPDU in the aggregation wasn't acked)
2151 	 * Still it's important to update RS about sent vs. acked.
2152 	 */
2153 	if (!is_flush && skb_queue_empty(&reclaimed_skbs) &&
2154 	    !iwl_mvm_has_tlc_offload(mvm)) {
2155 		struct ieee80211_chanctx_conf *chanctx_conf = NULL;
2156 
2157 		/* no TLC offload, so non-MLD mode */
2158 		if (mvmsta->vif)
2159 			chanctx_conf =
2160 				rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf);
2161 
2162 		if (WARN_ON_ONCE(!chanctx_conf))
2163 			goto out;
2164 
2165 		tx_info->band = chanctx_conf->def.chan->band;
2166 		iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info);
2167 
2168 		IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
2169 		iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false);
2170 	}
2171 
2172 out:
2173 	rcu_read_unlock();
2174 
2175 	while (!skb_queue_empty(&reclaimed_skbs)) {
2176 		skb = __skb_dequeue(&reclaimed_skbs);
2177 		ieee80211_tx_status_skb(mvm->hw, skb);
2178 	}
2179 }
2180 
2181 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
2182 {
2183 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
2184 	unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
2185 	int sta_id, tid, txq, index;
2186 	struct ieee80211_tx_info ba_info = {};
2187 	struct iwl_mvm_ba_notif *ba_notif;
2188 	struct iwl_mvm_tid_data *tid_data;
2189 	struct iwl_mvm_sta *mvmsta;
2190 
2191 	ba_info.flags = IEEE80211_TX_STAT_AMPDU;
2192 
2193 	if (iwl_mvm_has_new_tx_api(mvm)) {
2194 		struct iwl_mvm_compressed_ba_notif *ba_res =
2195 			(void *)pkt->data;
2196 		u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
2197 		u16 tfd_cnt;
2198 		int i;
2199 
2200 		if (IWL_FW_CHECK(mvm, sizeof(*ba_res) > pkt_len,
2201 				 "short BA notification (%d)\n", pkt_len))
2202 			return;
2203 
2204 		sta_id = ba_res->sta_id;
2205 		ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
2206 		ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
2207 		ba_info.status.tx_time =
2208 			(u16)le32_to_cpu(ba_res->wireless_time);
2209 		ba_info.status.status_driver_data[0] =
2210 			(void *)(uintptr_t)ba_res->reduced_txp;
2211 
2212 		tfd_cnt = le16_to_cpu(ba_res->tfd_cnt);
2213 		if (!tfd_cnt)
2214 			return;
2215 
2216 		if (IWL_FW_CHECK(mvm,
2217 				 struct_size(ba_res, tfd, tfd_cnt) > pkt_len,
2218 				 "short BA notification (tfds:%d, size:%d)\n",
2219 				 tfd_cnt, pkt_len))
2220 			return;
2221 
2222 		IWL_DEBUG_TX_REPLY(mvm,
2223 				   "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
2224 				   sta_id, le32_to_cpu(ba_res->flags),
2225 				   le16_to_cpu(ba_res->txed),
2226 				   le16_to_cpu(ba_res->done));
2227 
2228 		rcu_read_lock();
2229 
2230 		mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2231 		/*
2232 		 * It's possible to get a BA response after invalidating the rcu
2233 		 * (rcu is invalidated in order to prevent new Tx from being
2234 		 * sent, but there may be some frames already in-flight).
2235 		 * In this case we just want to reclaim, and could skip all the
2236 		 * sta-dependent stuff since it's in the middle of being removed
2237 		 * anyways.
2238 		 */
2239 
2240 		/* Free per TID */
2241 		for (i = 0; i < tfd_cnt; i++) {
2242 			struct iwl_mvm_compressed_ba_tfd *ba_tfd =
2243 				&ba_res->tfd[i];
2244 
2245 			tid = ba_tfd->tid;
2246 			if (tid == IWL_MGMT_TID)
2247 				tid = IWL_MAX_TID_COUNT;
2248 
2249 			if (mvmsta)
2250 				mvmsta->tid_data[i].lq_color = lq_color;
2251 
2252 			iwl_mvm_tx_reclaim(mvm, sta_id, tid,
2253 					   (int)(le16_to_cpu(ba_tfd->q_num)),
2254 					   le16_to_cpu(ba_tfd->tfd_index),
2255 					   &ba_info,
2256 					   le32_to_cpu(ba_res->tx_rate), false);
2257 		}
2258 
2259 		if (mvmsta) {
2260 			iwl_mvm_tx_airtime(mvm, mvmsta,
2261 					   le32_to_cpu(ba_res->wireless_time));
2262 
2263 			iwl_mvm_count_mpdu(mvmsta, sta_id,
2264 					   le16_to_cpu(ba_res->txed), true, 0);
2265 		}
2266 		rcu_read_unlock();
2267 		return;
2268 	}
2269 
2270 	ba_notif = (void *)pkt->data;
2271 	sta_id = ba_notif->sta_id;
2272 	tid = ba_notif->tid;
2273 	/* "flow" corresponds to Tx queue */
2274 	txq = le16_to_cpu(ba_notif->scd_flow);
2275 	/* "ssn" is start of block-ack Tx window, corresponds to index
2276 	 * (in Tx queue's circular buffer) of first TFD/frame in window */
2277 	index = le16_to_cpu(ba_notif->scd_ssn);
2278 
2279 	rcu_read_lock();
2280 	mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2281 	if (IWL_FW_CHECK(mvm, !mvmsta,
2282 			 "invalid STA ID %d in BA notif\n",
2283 			 sta_id)) {
2284 		rcu_read_unlock();
2285 		return;
2286 	}
2287 
2288 	tid_data = &mvmsta->tid_data[tid];
2289 
2290 	ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
2291 	ba_info.status.ampdu_len = ba_notif->txed;
2292 	ba_info.status.tx_time = tid_data->tx_time;
2293 	ba_info.status.status_driver_data[0] =
2294 		(void *)(uintptr_t)ba_notif->reduced_txp;
2295 
2296 	rcu_read_unlock();
2297 
2298 	IWL_DEBUG_TX_REPLY(mvm,
2299 			   "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
2300 			   ba_notif->sta_addr, ba_notif->sta_id);
2301 
2302 	IWL_DEBUG_TX_REPLY(mvm,
2303 			   "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
2304 			   ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
2305 			   le64_to_cpu(ba_notif->bitmap), txq, index,
2306 			   ba_notif->txed, ba_notif->txed_2_done);
2307 
2308 	IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
2309 			   ba_notif->reduced_txp);
2310 
2311 	iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
2312 			   tid_data->rate_n_flags, false);
2313 }
2314 
2315 /*
2316  * Note that there are transports that buffer frames before they reach
2317  * the firmware. This means that after flush_tx_path is called, the
2318  * queue might not be empty. The race-free way to handle this is to:
2319  * 1) set the station as draining
2320  * 2) flush the Tx path
2321  * 3) wait for the transport queues to be empty
2322  */
2323 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk)
2324 {
2325 	int ret;
2326 	struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
2327 		.queues_ctl = cpu_to_le32(tfd_msk),
2328 		.flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
2329 	};
2330 
2331 	WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2332 	ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0,
2333 				   sizeof(flush_cmd), &flush_cmd);
2334 	if (ret)
2335 		IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2336 	return ret;
2337 }
2338 
2339 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids)
2340 {
2341 	int ret;
2342 	struct iwl_tx_path_flush_cmd_rsp *rsp;
2343 	struct iwl_tx_path_flush_cmd flush_cmd = {
2344 		.sta_id = cpu_to_le32(sta_id),
2345 		.tid_mask = cpu_to_le16(tids),
2346 	};
2347 
2348 	struct iwl_host_cmd cmd = {
2349 		.id = TXPATH_FLUSH,
2350 		.len = { sizeof(flush_cmd), },
2351 		.data = { &flush_cmd, },
2352 	};
2353 
2354 	WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2355 
2356 	if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0)
2357 		cmd.flags |= CMD_WANT_SKB | CMD_SEND_IN_RFKILL;
2358 
2359 	IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n",
2360 			    sta_id, tids);
2361 
2362 	ret = iwl_mvm_send_cmd(mvm, &cmd);
2363 
2364 	if (ret) {
2365 		IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2366 		return ret;
2367 	}
2368 
2369 	if (cmd.flags & CMD_WANT_SKB) {
2370 		int i;
2371 		int num_flushed_queues;
2372 
2373 		if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) {
2374 			ret = -EIO;
2375 			goto free_rsp;
2376 		}
2377 
2378 		rsp = (void *)cmd.resp_pkt->data;
2379 
2380 		if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id,
2381 			      "sta_id %d != rsp_sta_id %d",
2382 			      sta_id, le16_to_cpu(rsp->sta_id))) {
2383 			ret = -EIO;
2384 			goto free_rsp;
2385 		}
2386 
2387 		num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues);
2388 		if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP,
2389 			      "num_flushed_queues %d", num_flushed_queues)) {
2390 			ret = -EIO;
2391 			goto free_rsp;
2392 		}
2393 
2394 		for (i = 0; i < num_flushed_queues; i++) {
2395 			struct ieee80211_tx_info tx_info = {};
2396 			struct iwl_flush_queue_info *queue_info = &rsp->queues[i];
2397 			int tid = le16_to_cpu(queue_info->tid);
2398 			int read_before = le16_to_cpu(queue_info->read_before_flush);
2399 			int read_after = le16_to_cpu(queue_info->read_after_flush);
2400 			int queue_num = le16_to_cpu(queue_info->queue_num);
2401 
2402 			if (tid == IWL_MGMT_TID)
2403 				tid = IWL_MAX_TID_COUNT;
2404 
2405 			IWL_DEBUG_TX_QUEUES(mvm,
2406 					    "tid %d queue_id %d read-before %d read-after %d\n",
2407 					    tid, queue_num, read_before, read_after);
2408 
2409 			iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after,
2410 					   &tx_info, 0, true);
2411 		}
2412 free_rsp:
2413 		iwl_free_resp(&cmd);
2414 	}
2415 	return ret;
2416 }
2417 
2418 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, u32 sta_id, u32 tfd_queue_mask)
2419 {
2420 	if (iwl_mvm_has_new_tx_api(mvm))
2421 		return iwl_mvm_flush_sta_tids(mvm, sta_id, 0xffff);
2422 
2423 	return iwl_mvm_flush_tx_path(mvm, tfd_queue_mask);
2424 }
2425