1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3  * Copyright (C) 2012-2014, 2018-2023 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 /*
504  * Allocates and sets the Tx cmd the driver data pointers in the skb
505  */
506 static struct iwl_device_tx_cmd *
507 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
508 		      struct ieee80211_tx_info *info, int hdrlen,
509 		      struct ieee80211_sta *sta, u8 sta_id)
510 {
511 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
512 	struct iwl_device_tx_cmd *dev_cmd;
513 	struct iwl_tx_cmd *tx_cmd;
514 
515 	dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
516 
517 	if (unlikely(!dev_cmd))
518 		return NULL;
519 
520 	dev_cmd->hdr.cmd = TX_CMD;
521 
522 	if (iwl_mvm_has_new_tx_api(mvm)) {
523 		u32 rate_n_flags = 0;
524 		u16 flags = 0;
525 		struct iwl_mvm_sta *mvmsta = sta ?
526 			iwl_mvm_sta_from_mac80211(sta) : NULL;
527 		bool amsdu = false;
528 
529 		if (ieee80211_is_data_qos(hdr->frame_control)) {
530 			u8 *qc = ieee80211_get_qos_ctl(hdr);
531 
532 			amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
533 		}
534 
535 		if (!info->control.hw_key)
536 			flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
537 
538 		/*
539 		 * For data and mgmt packets rate info comes from the fw. Only
540 		 * set rate/antenna for injected frames with fixed rate, or
541 		 * when no sta is given.
542 		 */
543 		if (unlikely(!sta ||
544 			     info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)) {
545 			flags |= IWL_TX_FLAGS_CMD_RATE;
546 			rate_n_flags =
547 				iwl_mvm_get_tx_rate_n_flags(mvm, info, sta,
548 							    hdr->frame_control);
549 		} else if (!ieee80211_is_data(hdr->frame_control) ||
550 			   mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
551 			/* These are important frames */
552 			flags |= IWL_TX_FLAGS_HIGH_PRI;
553 		}
554 
555 		if (mvm->trans->trans_cfg->device_family >=
556 		    IWL_DEVICE_FAMILY_AX210) {
557 			struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload;
558 			u32 offload_assist = iwl_mvm_tx_csum(mvm, skb,
559 							     info, amsdu);
560 
561 			cmd->offload_assist = cpu_to_le32(offload_assist);
562 
563 			/* Total # bytes to be transmitted */
564 			cmd->len = cpu_to_le16((u16)skb->len);
565 
566 			/* Copy MAC header from skb into command buffer */
567 			memcpy(cmd->hdr, hdr, hdrlen);
568 
569 			cmd->flags = cpu_to_le16(flags);
570 			cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
571 		} else {
572 			struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
573 			u16 offload_assist = iwl_mvm_tx_csum(mvm, skb,
574 							     info, amsdu);
575 
576 			cmd->offload_assist = cpu_to_le16(offload_assist);
577 
578 			/* Total # bytes to be transmitted */
579 			cmd->len = cpu_to_le16((u16)skb->len);
580 
581 			/* Copy MAC header from skb into command buffer */
582 			memcpy(cmd->hdr, hdr, hdrlen);
583 
584 			cmd->flags = cpu_to_le32(flags);
585 			cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
586 		}
587 		goto out;
588 	}
589 
590 	tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
591 
592 	if (info->control.hw_key)
593 		iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
594 
595 	iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
596 
597 	iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
598 
599 	/* Copy MAC header from skb into command buffer */
600 	memcpy(tx_cmd->hdr, hdr, hdrlen);
601 
602 out:
603 	return dev_cmd;
604 }
605 
606 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
607 				       struct iwl_device_tx_cmd *cmd)
608 {
609 	struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
610 
611 	memset(&skb_info->status, 0, sizeof(skb_info->status));
612 	memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
613 
614 	skb_info->driver_data[1] = cmd;
615 }
616 
617 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
618 				      struct iwl_mvm_vif_link_info *link,
619 				      struct ieee80211_tx_info *info,
620 				      struct sk_buff *skb)
621 {
622 	struct ieee80211_hdr *hdr = (void *)skb->data;
623 	__le16 fc = hdr->frame_control;
624 
625 	switch (info->control.vif->type) {
626 	case NL80211_IFTYPE_AP:
627 	case NL80211_IFTYPE_ADHOC:
628 		/*
629 		 * Non-bufferable frames use the broadcast station, thus they
630 		 * use the probe queue.
631 		 * Also take care of the case where we send a deauth to a
632 		 * station that we don't have, or similarly an association
633 		 * response (with non-success status) for a station we can't
634 		 * accept.
635 		 * Also, disassociate frames might happen, particular with
636 		 * reason 7 ("Class 3 frame received from nonassociated STA").
637 		 */
638 		if (ieee80211_is_mgmt(fc) &&
639 		    (!ieee80211_is_bufferable_mmpdu(skb) ||
640 		     ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
641 			return link->mgmt_queue;
642 
643 		if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
644 		    is_multicast_ether_addr(hdr->addr1))
645 			return link->cab_queue;
646 
647 		WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
648 			  "fc=0x%02x", le16_to_cpu(fc));
649 		return link->mgmt_queue;
650 	case NL80211_IFTYPE_P2P_DEVICE:
651 		if (ieee80211_is_mgmt(fc))
652 			return mvm->p2p_dev_queue;
653 
654 		WARN_ON_ONCE(1);
655 		return mvm->p2p_dev_queue;
656 	default:
657 		WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
658 		return -1;
659 	}
660 }
661 
662 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
663 				       struct sk_buff *skb)
664 {
665 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
666 	struct iwl_mvm_vif *mvmvif =
667 		iwl_mvm_vif_from_mac80211(info->control.vif);
668 	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
669 	int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
670 	struct iwl_probe_resp_data *resp_data;
671 	const u8 *ie;
672 	u8 *pos;
673 	u8 match[] = {
674 		(WLAN_OUI_WFA >> 16) & 0xff,
675 		(WLAN_OUI_WFA >> 8) & 0xff,
676 		WLAN_OUI_WFA & 0xff,
677 		WLAN_OUI_TYPE_WFA_P2P,
678 	};
679 
680 	rcu_read_lock();
681 
682 	resp_data = rcu_dereference(mvmvif->deflink.probe_resp_data);
683 	if (!resp_data)
684 		goto out;
685 
686 	if (!resp_data->notif.noa_active)
687 		goto out;
688 
689 	ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
690 				    mgmt->u.probe_resp.variable,
691 				    skb->len - base_len,
692 				    match, 4, 2);
693 	if (!ie) {
694 		IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
695 		goto out;
696 	}
697 
698 	if (skb_tailroom(skb) < resp_data->noa_len) {
699 		if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
700 			IWL_ERR(mvm,
701 				"Failed to reallocate probe resp\n");
702 			goto out;
703 		}
704 	}
705 
706 	pos = skb_put(skb, resp_data->noa_len);
707 
708 	*pos++ = WLAN_EID_VENDOR_SPECIFIC;
709 	/* Set length of IE body (not including ID and length itself) */
710 	*pos++ = resp_data->noa_len - 2;
711 	*pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
712 	*pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
713 	*pos++ = WLAN_OUI_WFA & 0xff;
714 	*pos++ = WLAN_OUI_TYPE_WFA_P2P;
715 
716 	memcpy(pos, &resp_data->notif.noa_attr,
717 	       resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
718 
719 out:
720 	rcu_read_unlock();
721 }
722 
723 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
724 {
725 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
726 	struct ieee80211_tx_info info;
727 	struct iwl_device_tx_cmd *dev_cmd;
728 	u8 sta_id;
729 	int hdrlen = ieee80211_hdrlen(hdr->frame_control);
730 	__le16 fc = hdr->frame_control;
731 	bool offchannel = IEEE80211_SKB_CB(skb)->flags &
732 		IEEE80211_TX_CTL_TX_OFFCHAN;
733 	int queue = -1;
734 
735 	if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
736 		return -1;
737 
738 	memcpy(&info, skb->cb, sizeof(info));
739 
740 	if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen))
741 		return -1;
742 
743 	if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
744 		return -1;
745 
746 	if (info.control.vif) {
747 		struct iwl_mvm_vif *mvmvif =
748 			iwl_mvm_vif_from_mac80211(info.control.vif);
749 
750 		if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
751 		    info.control.vif->type == NL80211_IFTYPE_AP ||
752 		    info.control.vif->type == NL80211_IFTYPE_ADHOC) {
753 			u32 link_id = u32_get_bits(info.control.flags,
754 						   IEEE80211_TX_CTRL_MLO_LINK);
755 			struct iwl_mvm_vif_link_info *link;
756 
757 			if (link_id == IEEE80211_LINK_UNSPECIFIED) {
758 				if (info.control.vif->active_links)
759 					link_id = ffs(info.control.vif->active_links) - 1;
760 				else
761 					link_id = 0;
762 			}
763 
764 			link = mvmvif->link[link_id];
765 			if (WARN_ON(!link))
766 				return -1;
767 
768 			if (!ieee80211_is_data(hdr->frame_control))
769 				sta_id = link->bcast_sta.sta_id;
770 			else
771 				sta_id = link->mcast_sta.sta_id;
772 
773 			queue = iwl_mvm_get_ctrl_vif_queue(mvm, link, &info,
774 							   skb);
775 		} else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
776 			queue = mvm->snif_queue;
777 			sta_id = mvm->snif_sta.sta_id;
778 		} else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
779 			   offchannel) {
780 			/*
781 			 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
782 			 * that can be used in 2 different types of vifs, P2P &
783 			 * STATION.
784 			 * P2P uses the offchannel queue.
785 			 * STATION (HS2.0) uses the auxiliary context of the FW,
786 			 * and hence needs to be sent on the aux queue.
787 			 */
788 			sta_id = mvm->aux_sta.sta_id;
789 			queue = mvm->aux_queue;
790 		}
791 	}
792 
793 	if (queue < 0) {
794 		IWL_ERR(mvm, "No queue was found. Dropping TX\n");
795 		return -1;
796 	}
797 
798 	if (unlikely(ieee80211_is_probe_resp(fc)))
799 		iwl_mvm_probe_resp_set_noa(mvm, skb);
800 
801 	IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
802 
803 	dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
804 	if (!dev_cmd)
805 		return -1;
806 
807 	/* From now on, we cannot access info->control */
808 	iwl_mvm_skb_prepare_status(skb, dev_cmd);
809 
810 	if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
811 		iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
812 		return -1;
813 	}
814 
815 	return 0;
816 }
817 
818 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
819 				    struct ieee80211_sta *sta, unsigned int tid)
820 {
821 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
822 	u8 ac = tid_to_mac80211_ac[tid];
823 	enum nl80211_band band;
824 	unsigned int txf;
825 	unsigned int val;
826 	int lmac;
827 
828 	/* For HE redirect to trigger based fifos */
829 	if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
830 		ac += 4;
831 
832 	txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
833 
834 	/*
835 	 * Don't send an AMSDU that will be longer than the TXF.
836 	 * Add a security margin of 256 for the TX command + headers.
837 	 * We also want to have the start of the next packet inside the
838 	 * fifo to be able to send bursts.
839 	 */
840 	val = mvmsta->max_amsdu_len;
841 
842 	if (hweight16(sta->valid_links) <= 1) {
843 		if (sta->valid_links) {
844 			struct ieee80211_bss_conf *link_conf;
845 			unsigned int link = ffs(sta->valid_links) - 1;
846 
847 			rcu_read_lock();
848 			link_conf = rcu_dereference(mvmsta->vif->link_conf[link]);
849 			if (WARN_ON(!link_conf))
850 				band = NL80211_BAND_2GHZ;
851 			else
852 				band = link_conf->chandef.chan->band;
853 			rcu_read_unlock();
854 		} else {
855 			band = mvmsta->vif->bss_conf.chandef.chan->band;
856 		}
857 
858 		lmac = iwl_mvm_get_lmac_id(mvm, band);
859 	} else if (fw_has_capa(&mvm->fw->ucode_capa,
860 			       IWL_UCODE_TLV_CAPA_CDB_SUPPORT)) {
861 		/* for real MLO restrict to both LMACs if they exist */
862 		lmac = IWL_LMAC_5G_INDEX;
863 		val = min_t(unsigned int, val,
864 			    mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
865 		lmac = IWL_LMAC_24G_INDEX;
866 	} else {
867 		lmac = IWL_LMAC_24G_INDEX;
868 	}
869 
870 	return min_t(unsigned int, val,
871 		     mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
872 }
873 
874 #ifdef CONFIG_INET
875 
876 static int
877 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
878 		       netdev_features_t netdev_flags,
879 		       struct sk_buff_head *mpdus_skb)
880 {
881 	struct sk_buff *tmp, *next;
882 	struct ieee80211_hdr *hdr = (void *)skb->data;
883 	char cb[sizeof(skb->cb)];
884 	u16 i = 0;
885 	unsigned int tcp_payload_len;
886 	unsigned int mss = skb_shinfo(skb)->gso_size;
887 	bool ipv4 = (skb->protocol == htons(ETH_P_IP));
888 	bool qos = ieee80211_is_data_qos(hdr->frame_control);
889 	u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
890 
891 	skb_shinfo(skb)->gso_size = num_subframes * mss;
892 	memcpy(cb, skb->cb, sizeof(cb));
893 
894 	next = skb_gso_segment(skb, netdev_flags);
895 	skb_shinfo(skb)->gso_size = mss;
896 	skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
897 	if (WARN_ON_ONCE(IS_ERR(next)))
898 		return -EINVAL;
899 	else if (next)
900 		consume_skb(skb);
901 
902 	skb_list_walk_safe(next, tmp, next) {
903 		memcpy(tmp->cb, cb, sizeof(tmp->cb));
904 		/*
905 		 * Compute the length of all the data added for the A-MSDU.
906 		 * This will be used to compute the length to write in the TX
907 		 * command. We have: SNAP + IP + TCP for n -1 subframes and
908 		 * ETH header for n subframes.
909 		 */
910 		tcp_payload_len = skb_tail_pointer(tmp) -
911 			skb_transport_header(tmp) -
912 			tcp_hdrlen(tmp) + tmp->data_len;
913 
914 		if (ipv4)
915 			ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
916 
917 		if (tcp_payload_len > mss) {
918 			skb_shinfo(tmp)->gso_size = mss;
919 			skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 :
920 							   SKB_GSO_TCPV6;
921 		} else {
922 			if (qos) {
923 				u8 *qc;
924 
925 				if (ipv4)
926 					ip_send_check(ip_hdr(tmp));
927 
928 				qc = ieee80211_get_qos_ctl((void *)tmp->data);
929 				*qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
930 			}
931 			skb_shinfo(tmp)->gso_size = 0;
932 		}
933 
934 		skb_mark_not_on_list(tmp);
935 		__skb_queue_tail(mpdus_skb, tmp);
936 		i++;
937 	}
938 
939 	return 0;
940 }
941 
942 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
943 			  struct ieee80211_tx_info *info,
944 			  struct ieee80211_sta *sta,
945 			  struct sk_buff_head *mpdus_skb)
946 {
947 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
948 	struct ieee80211_hdr *hdr = (void *)skb->data;
949 	unsigned int mss = skb_shinfo(skb)->gso_size;
950 	unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
951 	u16 snap_ip_tcp, pad;
952 	netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
953 	u8 tid;
954 
955 	snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
956 		tcp_hdrlen(skb);
957 
958 	if (!mvmsta->max_amsdu_len ||
959 	    !ieee80211_is_data_qos(hdr->frame_control) ||
960 	    !mvmsta->amsdu_enabled)
961 		return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
962 
963 	/*
964 	 * Do not build AMSDU for IPv6 with extension headers.
965 	 * ask stack to segment and checkum the generated MPDUs for us.
966 	 */
967 	if (skb->protocol == htons(ETH_P_IPV6) &&
968 	    ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
969 	    IPPROTO_TCP) {
970 		netdev_flags &= ~NETIF_F_CSUM_MASK;
971 		return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
972 	}
973 
974 	tid = ieee80211_get_tid(hdr);
975 	if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
976 		return -EINVAL;
977 
978 	/*
979 	 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
980 	 * during an BA session.
981 	 */
982 	if ((info->flags & IEEE80211_TX_CTL_AMPDU &&
983 	     !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) ||
984 	    !(mvmsta->amsdu_enabled & BIT(tid)))
985 		return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
986 
987 	/*
988 	 * Take the min of ieee80211 station and mvm station
989 	 */
990 	max_amsdu_len =
991 		min_t(unsigned int, sta->cur->max_amsdu_len,
992 		      iwl_mvm_max_amsdu_size(mvm, sta, tid));
993 
994 	/*
995 	 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
996 	 * supported. This is a spec requirement (IEEE 802.11-2015
997 	 * section 8.7.3 NOTE 3).
998 	 */
999 	if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1000 	    !sta->deflink.vht_cap.vht_supported)
1001 		max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
1002 
1003 	/* Sub frame header + SNAP + IP header + TCP header + MSS */
1004 	subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
1005 	pad = (4 - subf_len) & 0x3;
1006 
1007 	/*
1008 	 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
1009 	 * N * subf_len + (N - 1) * pad.
1010 	 */
1011 	num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
1012 
1013 	if (sta->max_amsdu_subframes &&
1014 	    num_subframes > sta->max_amsdu_subframes)
1015 		num_subframes = sta->max_amsdu_subframes;
1016 
1017 	tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1018 		tcp_hdrlen(skb) + skb->data_len;
1019 
1020 	/*
1021 	 * Make sure we have enough TBs for the A-MSDU:
1022 	 *	2 for each subframe
1023 	 *	1 more for each fragment
1024 	 *	1 more for the potential data in the header
1025 	 */
1026 	if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
1027 	    mvm->trans->max_skb_frags)
1028 		num_subframes = 1;
1029 
1030 	if (num_subframes > 1)
1031 		*ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
1032 
1033 	/* This skb fits in one single A-MSDU */
1034 	if (num_subframes * mss >= tcp_payload_len) {
1035 		__skb_queue_tail(mpdus_skb, skb);
1036 		return 0;
1037 	}
1038 
1039 	/*
1040 	 * Trick the segmentation function to make it
1041 	 * create SKBs that can fit into one A-MSDU.
1042 	 */
1043 	return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags,
1044 				      mpdus_skb);
1045 }
1046 #else /* CONFIG_INET */
1047 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
1048 			  struct ieee80211_tx_info *info,
1049 			  struct ieee80211_sta *sta,
1050 			  struct sk_buff_head *mpdus_skb)
1051 {
1052 	/* Impossible to get TSO with CONFIG_INET */
1053 	WARN_ON(1);
1054 
1055 	return -1;
1056 }
1057 #endif
1058 
1059 /* Check if there are any timed-out TIDs on a given shared TXQ */
1060 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
1061 {
1062 	unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
1063 	unsigned long now = jiffies;
1064 	int tid;
1065 
1066 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1067 		return false;
1068 
1069 	for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1070 		if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
1071 				IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1072 			return true;
1073 	}
1074 
1075 	return false;
1076 }
1077 
1078 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
1079 			       struct iwl_mvm_sta *mvmsta,
1080 			       int airtime)
1081 {
1082 	int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1083 	struct iwl_mvm_tcm_mac *mdata;
1084 
1085 	if (mac >= NUM_MAC_INDEX_DRIVER)
1086 		return;
1087 
1088 	mdata = &mvm->tcm.data[mac];
1089 
1090 	if (mvm->tcm.paused)
1091 		return;
1092 
1093 	if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1094 		schedule_delayed_work(&mvm->tcm.work, 0);
1095 
1096 	mdata->tx.airtime += airtime;
1097 }
1098 
1099 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
1100 				 struct iwl_mvm_sta *mvmsta, int tid)
1101 {
1102 	u32 ac = tid_to_mac80211_ac[tid];
1103 	int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1104 	struct iwl_mvm_tcm_mac *mdata;
1105 
1106 	if (mac >= NUM_MAC_INDEX_DRIVER)
1107 		return -EINVAL;
1108 
1109 	mdata = &mvm->tcm.data[mac];
1110 
1111 	mdata->tx.pkts[ac]++;
1112 
1113 	return 0;
1114 }
1115 
1116 /*
1117  * Sets the fields in the Tx cmd that are crypto related.
1118  *
1119  * This function must be called with BHs disabled.
1120  */
1121 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
1122 			   struct ieee80211_tx_info *info,
1123 			   struct ieee80211_sta *sta)
1124 {
1125 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1126 	struct iwl_mvm_sta *mvmsta;
1127 	struct iwl_device_tx_cmd *dev_cmd;
1128 	__le16 fc;
1129 	u16 seq_number = 0;
1130 	u8 tid = IWL_MAX_TID_COUNT;
1131 	u16 txq_id;
1132 	bool is_ampdu = false;
1133 	int hdrlen;
1134 
1135 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
1136 	fc = hdr->frame_control;
1137 	hdrlen = ieee80211_hdrlen(fc);
1138 
1139 	if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
1140 		return -1;
1141 
1142 	if (WARN_ON_ONCE(!mvmsta))
1143 		return -1;
1144 
1145 	if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA))
1146 		return -1;
1147 
1148 	if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he)
1149 		return -1;
1150 
1151 	if (unlikely(ieee80211_is_probe_resp(fc)))
1152 		iwl_mvm_probe_resp_set_noa(mvm, skb);
1153 
1154 	dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1155 					sta, mvmsta->deflink.sta_id);
1156 	if (!dev_cmd)
1157 		goto drop;
1158 
1159 	/*
1160 	 * we handle that entirely ourselves -- for uAPSD the firmware
1161 	 * will always send a notification, and for PS-Poll responses
1162 	 * we'll notify mac80211 when getting frame status
1163 	 */
1164 	info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1165 
1166 	spin_lock(&mvmsta->lock);
1167 
1168 	/* nullfunc frames should go to the MGMT queue regardless of QOS,
1169 	 * the conditions of !ieee80211_is_qos_nullfunc(fc) and
1170 	 * !ieee80211_is_data_qos(fc) keep the default assignment of MGMT TID
1171 	 */
1172 	if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1173 		tid = ieee80211_get_tid(hdr);
1174 		if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid))
1175 			goto drop_unlock_sta;
1176 
1177 		is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1178 		if (WARN_ONCE(is_ampdu &&
1179 			      mvmsta->tid_data[tid].state != IWL_AGG_ON,
1180 			      "Invalid internal agg state %d for TID %d",
1181 			       mvmsta->tid_data[tid].state, tid))
1182 			goto drop_unlock_sta;
1183 
1184 		seq_number = mvmsta->tid_data[tid].seq_number;
1185 		seq_number &= IEEE80211_SCTL_SEQ;
1186 
1187 		if (!iwl_mvm_has_new_tx_api(mvm)) {
1188 			struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1189 
1190 			hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1191 			hdr->seq_ctrl |= cpu_to_le16(seq_number);
1192 			/* update the tx_cmd hdr as it was already copied */
1193 			tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1194 		}
1195 	} else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc) &&
1196 		   !ieee80211_is_nullfunc(fc)) {
1197 		tid = IWL_TID_NON_QOS;
1198 	}
1199 
1200 	txq_id = mvmsta->tid_data[tid].txq_id;
1201 
1202 	WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1203 
1204 	if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) {
1205 		iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1206 		spin_unlock(&mvmsta->lock);
1207 		return -1;
1208 	}
1209 
1210 	if (!iwl_mvm_has_new_tx_api(mvm)) {
1211 		/* Keep track of the time of the last frame for this RA/TID */
1212 		mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1213 
1214 		/*
1215 		 * If we have timed-out TIDs - schedule the worker that will
1216 		 * reconfig the queues and update them
1217 		 *
1218 		 * Note that the no lock is taken here in order to not serialize
1219 		 * the TX flow. This isn't dangerous because scheduling
1220 		 * mvm->add_stream_wk can't ruin the state, and if we DON'T
1221 		 * schedule it due to some race condition then next TX we get
1222 		 * here we will.
1223 		 */
1224 		if (unlikely(mvm->queue_info[txq_id].status ==
1225 			     IWL_MVM_QUEUE_SHARED &&
1226 			     iwl_mvm_txq_should_update(mvm, txq_id)))
1227 			schedule_work(&mvm->add_stream_wk);
1228 	}
1229 
1230 	IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n",
1231 		     mvmsta->deflink.sta_id, tid, txq_id,
1232 		     IEEE80211_SEQ_TO_SN(seq_number), skb->len);
1233 
1234 	/* From now on, we cannot access info->control */
1235 	iwl_mvm_skb_prepare_status(skb, dev_cmd);
1236 
1237 	/*
1238 	 * The IV is introduced by the HW for new tx api, and it is not present
1239 	 * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the
1240 	 * IV for those devices.
1241 	 */
1242 	if (ieee80211_is_data(fc))
1243 		iwl_mvm_mei_tx_copy_to_csme(mvm, skb,
1244 					    info->control.hw_key &&
1245 					    !iwl_mvm_has_new_tx_api(mvm) ?
1246 					    info->control.hw_key->iv_len : 0);
1247 
1248 	if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1249 		goto drop_unlock_sta;
1250 
1251 	if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1252 		mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1253 
1254 	spin_unlock(&mvmsta->lock);
1255 
1256 	if (iwl_mvm_tx_pkt_queued(mvm, mvmsta,
1257 				  tid == IWL_MAX_TID_COUNT ? 0 : tid))
1258 		goto drop;
1259 
1260 	return 0;
1261 
1262 drop_unlock_sta:
1263 	iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1264 	spin_unlock(&mvmsta->lock);
1265 drop:
1266 	IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->deflink.sta_id,
1267 		     tid);
1268 	return -1;
1269 }
1270 
1271 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb,
1272 		       struct ieee80211_sta *sta)
1273 {
1274 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1275 	struct ieee80211_tx_info info;
1276 	struct sk_buff_head mpdus_skbs;
1277 	unsigned int payload_len;
1278 	int ret;
1279 	struct sk_buff *orig_skb = skb;
1280 
1281 	if (WARN_ON_ONCE(!mvmsta))
1282 		return -1;
1283 
1284 	if (WARN_ON_ONCE(mvmsta->deflink.sta_id == IWL_MVM_INVALID_STA))
1285 		return -1;
1286 
1287 	memcpy(&info, skb->cb, sizeof(info));
1288 
1289 	if (!skb_is_gso(skb))
1290 		return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1291 
1292 	payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1293 		tcp_hdrlen(skb) + skb->data_len;
1294 
1295 	if (payload_len <= skb_shinfo(skb)->gso_size)
1296 		return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1297 
1298 	__skb_queue_head_init(&mpdus_skbs);
1299 
1300 	ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1301 	if (ret)
1302 		return ret;
1303 
1304 	WARN_ON(skb_queue_empty(&mpdus_skbs));
1305 
1306 	while (!skb_queue_empty(&mpdus_skbs)) {
1307 		skb = __skb_dequeue(&mpdus_skbs);
1308 
1309 		ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1310 		if (ret) {
1311 			/* Free skbs created as part of TSO logic that have not yet been dequeued */
1312 			__skb_queue_purge(&mpdus_skbs);
1313 			/* skb here is not necessarily same as skb that entered this method,
1314 			 * so free it explicitly.
1315 			 */
1316 			if (skb == orig_skb)
1317 				ieee80211_free_txskb(mvm->hw, skb);
1318 			else
1319 				kfree_skb(skb);
1320 			/* there was error, but we consumed skb one way or another, so return 0 */
1321 			return 0;
1322 		}
1323 	}
1324 
1325 	return 0;
1326 }
1327 
1328 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1329 				      struct ieee80211_sta *sta, u8 tid)
1330 {
1331 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1332 	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1333 	struct ieee80211_vif *vif = mvmsta->vif;
1334 	u16 normalized_ssn;
1335 
1336 	lockdep_assert_held(&mvmsta->lock);
1337 
1338 	if ((tid_data->state == IWL_AGG_ON ||
1339 	     tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1340 	    iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1341 		/*
1342 		 * Now that this aggregation or DQA queue is empty tell
1343 		 * mac80211 so it knows we no longer have frames buffered for
1344 		 * the station on this TID (for the TIM bitmap calculation.)
1345 		 */
1346 		ieee80211_sta_set_buffered(sta, tid, false);
1347 	}
1348 
1349 	/*
1350 	 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1351 	 * to align the wrap around of ssn so we compare relevant values.
1352 	 */
1353 	normalized_ssn = tid_data->ssn;
1354 	if (mvm->trans->trans_cfg->gen2)
1355 		normalized_ssn &= 0xff;
1356 
1357 	if (normalized_ssn != tid_data->next_reclaimed)
1358 		return;
1359 
1360 	switch (tid_data->state) {
1361 	case IWL_EMPTYING_HW_QUEUE_ADDBA:
1362 		IWL_DEBUG_TX_QUEUES(mvm,
1363 				    "Can continue addBA flow ssn = next_recl = %d\n",
1364 				    tid_data->next_reclaimed);
1365 		tid_data->state = IWL_AGG_STARTING;
1366 		ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1367 		break;
1368 
1369 	case IWL_EMPTYING_HW_QUEUE_DELBA:
1370 		IWL_DEBUG_TX_QUEUES(mvm,
1371 				    "Can continue DELBA flow ssn = next_recl = %d\n",
1372 				    tid_data->next_reclaimed);
1373 		tid_data->state = IWL_AGG_OFF;
1374 		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1375 		break;
1376 
1377 	default:
1378 		break;
1379 	}
1380 }
1381 
1382 #ifdef CONFIG_IWLWIFI_DEBUG
1383 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1384 {
1385 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1386 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1387 
1388 	switch (status & TX_STATUS_MSK) {
1389 	case TX_STATUS_SUCCESS:
1390 		return "SUCCESS";
1391 	TX_STATUS_POSTPONE(DELAY);
1392 	TX_STATUS_POSTPONE(FEW_BYTES);
1393 	TX_STATUS_POSTPONE(BT_PRIO);
1394 	TX_STATUS_POSTPONE(QUIET_PERIOD);
1395 	TX_STATUS_POSTPONE(CALC_TTAK);
1396 	TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1397 	TX_STATUS_FAIL(SHORT_LIMIT);
1398 	TX_STATUS_FAIL(LONG_LIMIT);
1399 	TX_STATUS_FAIL(UNDERRUN);
1400 	TX_STATUS_FAIL(DRAIN_FLOW);
1401 	TX_STATUS_FAIL(RFKILL_FLUSH);
1402 	TX_STATUS_FAIL(LIFE_EXPIRE);
1403 	TX_STATUS_FAIL(DEST_PS);
1404 	TX_STATUS_FAIL(HOST_ABORTED);
1405 	TX_STATUS_FAIL(BT_RETRY);
1406 	TX_STATUS_FAIL(STA_INVALID);
1407 	TX_STATUS_FAIL(FRAG_DROPPED);
1408 	TX_STATUS_FAIL(TID_DISABLE);
1409 	TX_STATUS_FAIL(FIFO_FLUSHED);
1410 	TX_STATUS_FAIL(SMALL_CF_POLL);
1411 	TX_STATUS_FAIL(FW_DROP);
1412 	TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1413 	}
1414 
1415 	return "UNKNOWN";
1416 
1417 #undef TX_STATUS_FAIL
1418 #undef TX_STATUS_POSTPONE
1419 }
1420 #endif /* CONFIG_IWLWIFI_DEBUG */
1421 
1422 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width)
1423 {
1424 	switch (chan_width) {
1425 	case RATE_MCS_CHAN_WIDTH_20:
1426 		return 0;
1427 	case RATE_MCS_CHAN_WIDTH_40:
1428 		return IEEE80211_TX_RC_40_MHZ_WIDTH;
1429 	case RATE_MCS_CHAN_WIDTH_80:
1430 		return IEEE80211_TX_RC_80_MHZ_WIDTH;
1431 	case RATE_MCS_CHAN_WIDTH_160:
1432 		return IEEE80211_TX_RC_160_MHZ_WIDTH;
1433 	default:
1434 		return 0;
1435 	}
1436 }
1437 
1438 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1439 			       enum nl80211_band band,
1440 			       struct ieee80211_tx_rate *r)
1441 {
1442 	u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK;
1443 	u32 rate = format == RATE_MCS_HT_MSK ?
1444 		RATE_HT_MCS_INDEX(rate_n_flags) :
1445 		rate_n_flags & RATE_MCS_CODE_MSK;
1446 
1447 	r->flags |=
1448 		iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1449 					      RATE_MCS_CHAN_WIDTH_MSK);
1450 
1451 	if (rate_n_flags & RATE_MCS_SGI_MSK)
1452 		r->flags |= IEEE80211_TX_RC_SHORT_GI;
1453 	if (format ==  RATE_MCS_HT_MSK) {
1454 		r->flags |= IEEE80211_TX_RC_MCS;
1455 		r->idx = rate;
1456 	} else if (format ==  RATE_MCS_VHT_MSK) {
1457 		ieee80211_rate_set_vht(r, rate,
1458 				       FIELD_GET(RATE_MCS_NSS_MSK,
1459 						 rate_n_flags) + 1);
1460 		r->flags |= IEEE80211_TX_RC_VHT_MCS;
1461 	} else if (format == RATE_MCS_HE_MSK) {
1462 		/* mac80211 cannot do this without ieee80211_tx_status_ext()
1463 		 * but it only matters for radiotap */
1464 		r->idx = 0;
1465 	} else {
1466 		r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags,
1467 							       band);
1468 	}
1469 }
1470 
1471 void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags,
1472 				  enum nl80211_band band,
1473 				  struct ieee80211_tx_rate *r)
1474 {
1475 	if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1476 		r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1477 
1478 	r->flags |=
1479 		iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1480 					      RATE_MCS_CHAN_WIDTH_MSK_V1);
1481 
1482 	if (rate_n_flags & RATE_MCS_SGI_MSK_V1)
1483 		r->flags |= IEEE80211_TX_RC_SHORT_GI;
1484 	if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
1485 		r->flags |= IEEE80211_TX_RC_MCS;
1486 		r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1;
1487 	} else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) {
1488 		ieee80211_rate_set_vht(
1489 			r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1490 			FIELD_GET(RATE_MCS_NSS_MSK, rate_n_flags) + 1);
1491 		r->flags |= IEEE80211_TX_RC_VHT_MCS;
1492 	} else {
1493 		r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1494 							     band);
1495 	}
1496 }
1497 
1498 /*
1499  * translate ucode response to mac80211 tx status control values
1500  */
1501 static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw,
1502 					u32 rate_n_flags,
1503 					struct ieee80211_tx_info *info)
1504 {
1505 	struct ieee80211_tx_rate *r = &info->status.rates[0];
1506 
1507 	if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP,
1508 				    TX_CMD, 0) <= 6)
1509 		rate_n_flags = iwl_new_rate_from_v1(rate_n_flags);
1510 
1511 	info->status.antenna =
1512 		((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS);
1513 	iwl_mvm_hwrate_to_tx_rate(rate_n_flags,
1514 				  info->band, r);
1515 }
1516 
1517 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1518 					    u32 status, __le16 frame_control)
1519 {
1520 	struct iwl_fw_dbg_trigger_tlv *trig;
1521 	struct iwl_fw_dbg_trigger_tx_status *status_trig;
1522 	int i;
1523 
1524 	if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) {
1525 		enum iwl_fw_ini_time_point tp =
1526 			IWL_FW_INI_TIME_POINT_TX_FAILED;
1527 
1528 		if (ieee80211_is_action(frame_control))
1529 			tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED;
1530 
1531 		iwl_dbg_tlv_time_point(&mvm->fwrt,
1532 				       tp, NULL);
1533 		return;
1534 	}
1535 
1536 	trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
1537 				     FW_DBG_TRIGGER_TX_STATUS);
1538 	if (!trig)
1539 		return;
1540 
1541 	status_trig = (void *)trig->data;
1542 
1543 	for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1544 		/* don't collect on status 0 */
1545 		if (!status_trig->statuses[i].status)
1546 			break;
1547 
1548 		if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1549 			continue;
1550 
1551 		iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1552 					"Tx status %d was received",
1553 					status & TX_STATUS_MSK);
1554 		break;
1555 	}
1556 }
1557 
1558 /*
1559  * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1560  * @tx_resp: the Tx response from the fw (agg or non-agg)
1561  *
1562  * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1563  * it can't know that everything will go well until the end of the AMPDU, it
1564  * can't know in advance the number of MPDUs that will be sent in the current
1565  * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1566  * Hence, it can't know in advance what the SSN of the SCD will be at the end
1567  * of the batch. This is why the SSN of the SCD is written at the end of the
1568  * whole struct at a variable offset. This function knows how to cope with the
1569  * variable offset and returns the SSN of the SCD.
1570  */
1571 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1572 				      struct iwl_mvm_tx_resp *tx_resp)
1573 {
1574 	return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1575 			    tx_resp->frame_count) & 0xfff;
1576 }
1577 
1578 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1579 				     struct iwl_rx_packet *pkt)
1580 {
1581 	struct ieee80211_sta *sta;
1582 	u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1583 	int txq_id = SEQ_TO_QUEUE(sequence);
1584 	/* struct iwl_mvm_tx_resp_v3 is almost the same */
1585 	struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1586 	int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1587 	int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1588 	struct agg_tx_status *agg_status =
1589 		iwl_mvm_get_agg_status(mvm, tx_resp);
1590 	u32 status = le16_to_cpu(agg_status->status);
1591 	u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1592 	struct sk_buff_head skbs;
1593 	u8 skb_freed = 0;
1594 	u8 lq_color;
1595 	u16 next_reclaimed, seq_ctl;
1596 	bool is_ndp = false;
1597 
1598 	__skb_queue_head_init(&skbs);
1599 
1600 	if (iwl_mvm_has_new_tx_api(mvm))
1601 		txq_id = le16_to_cpu(tx_resp->tx_queue);
1602 
1603 	seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1604 
1605 	/* we can free until ssn % q.n_bd not inclusive */
1606 	iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs, false);
1607 
1608 	while (!skb_queue_empty(&skbs)) {
1609 		struct sk_buff *skb = __skb_dequeue(&skbs);
1610 		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1611 		struct ieee80211_hdr *hdr = (void *)skb->data;
1612 		bool flushed = false;
1613 
1614 		skb_freed++;
1615 
1616 		iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1617 
1618 		memset(&info->status, 0, sizeof(info->status));
1619 		info->flags &= ~(IEEE80211_TX_STAT_ACK | IEEE80211_TX_STAT_TX_FILTERED);
1620 
1621 		/* inform mac80211 about what happened with the frame */
1622 		switch (status & TX_STATUS_MSK) {
1623 		case TX_STATUS_SUCCESS:
1624 		case TX_STATUS_DIRECT_DONE:
1625 			info->flags |= IEEE80211_TX_STAT_ACK;
1626 			break;
1627 		case TX_STATUS_FAIL_FIFO_FLUSHED:
1628 		case TX_STATUS_FAIL_DRAIN_FLOW:
1629 			flushed = true;
1630 			break;
1631 		case TX_STATUS_FAIL_DEST_PS:
1632 			/* the FW should have stopped the queue and not
1633 			 * return this status
1634 			 */
1635 			IWL_ERR_LIMIT(mvm,
1636 				      "FW reported TX filtered, status=0x%x, FC=0x%x\n",
1637 				      status, le16_to_cpu(hdr->frame_control));
1638 			info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1639 			break;
1640 		default:
1641 			break;
1642 		}
1643 
1644 		if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1645 		    ieee80211_is_mgmt(hdr->frame_control))
1646 			iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
1647 
1648 		/*
1649 		 * If we are freeing multiple frames, mark all the frames
1650 		 * but the first one as acked, since they were acknowledged
1651 		 * before
1652 		 * */
1653 		if (skb_freed > 1)
1654 			info->flags |= IEEE80211_TX_STAT_ACK;
1655 
1656 		iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control);
1657 
1658 		info->status.rates[0].count = tx_resp->failure_frame + 1;
1659 
1660 		iwl_mvm_hwrate_to_tx_status(mvm->fw,
1661 					    le32_to_cpu(tx_resp->initial_rate),
1662 					    info);
1663 
1664 		/* Don't assign the converted initial_rate, because driver
1665 		 * TLC uses this and doesn't support the new FW rate
1666 		 */
1667 		info->status.status_driver_data[1] =
1668 			(void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1669 
1670 		/* Single frame failure in an AMPDU queue => send BAR */
1671 		if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1672 		    !(info->flags & IEEE80211_TX_STAT_ACK) &&
1673 		    !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1674 			info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1675 		info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1676 
1677 		/* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1678 		if (ieee80211_is_back_req(hdr->frame_control))
1679 			seq_ctl = 0;
1680 		else if (status != TX_STATUS_SUCCESS)
1681 			seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1682 
1683 		if (unlikely(!seq_ctl)) {
1684 			/*
1685 			 * If it is an NDP, we can't update next_reclaim since
1686 			 * its sequence control is 0. Note that for that same
1687 			 * reason, NDPs are never sent to A-MPDU'able queues
1688 			 * so that we can never have more than one freed frame
1689 			 * for a single Tx resonse (see WARN_ON below).
1690 			 */
1691 			if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1692 				is_ndp = true;
1693 		}
1694 
1695 		/*
1696 		 * TODO: this is not accurate if we are freeing more than one
1697 		 * packet.
1698 		 */
1699 		info->status.tx_time =
1700 			le16_to_cpu(tx_resp->wireless_media_time);
1701 		BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1702 		lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1703 		info->status.status_driver_data[0] =
1704 			RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1705 
1706 		if (likely(!iwl_mvm_time_sync_frame(mvm, skb, hdr->addr1)))
1707 			ieee80211_tx_status(mvm->hw, skb);
1708 	}
1709 
1710 	/* This is an aggregation queue or might become one, so we use
1711 	 * the ssn since: ssn = wifi seq_num % 256.
1712 	 * The seq_ctl is the sequence control of the packet to which
1713 	 * this Tx response relates. But if there is a hole in the
1714 	 * bitmap of the BA we received, this Tx response may allow to
1715 	 * reclaim the hole and all the subsequent packets that were
1716 	 * already acked. In that case, seq_ctl != ssn, and the next
1717 	 * packet to be reclaimed will be ssn and not seq_ctl. In that
1718 	 * case, several packets will be reclaimed even if
1719 	 * frame_count = 1.
1720 	 *
1721 	 * The ssn is the index (% 256) of the latest packet that has
1722 	 * treated (acked / dropped) + 1.
1723 	 */
1724 	next_reclaimed = ssn;
1725 
1726 	IWL_DEBUG_TX_REPLY(mvm,
1727 			   "TXQ %d status %s (0x%08x)\n",
1728 			   txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1729 
1730 	IWL_DEBUG_TX_REPLY(mvm,
1731 			   "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1732 			   le32_to_cpu(tx_resp->initial_rate),
1733 			   tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1734 			   ssn, next_reclaimed, seq_ctl);
1735 
1736 	rcu_read_lock();
1737 
1738 	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1739 	/*
1740 	 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1741 	 * the firmware while we still have packets for it in the Tx queues.
1742 	 */
1743 	if (WARN_ON_ONCE(!sta))
1744 		goto out;
1745 
1746 	if (!IS_ERR(sta)) {
1747 		struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1748 
1749 		iwl_mvm_tx_airtime(mvm, mvmsta,
1750 				   le16_to_cpu(tx_resp->wireless_media_time));
1751 
1752 		if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1753 		    mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
1754 			iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
1755 
1756 		if (sta->wme && tid != IWL_MGMT_TID) {
1757 			struct iwl_mvm_tid_data *tid_data =
1758 				&mvmsta->tid_data[tid];
1759 			bool send_eosp_ndp = false;
1760 
1761 			spin_lock_bh(&mvmsta->lock);
1762 
1763 			if (!is_ndp) {
1764 				tid_data->next_reclaimed = next_reclaimed;
1765 				IWL_DEBUG_TX_REPLY(mvm,
1766 						   "Next reclaimed packet:%d\n",
1767 						   next_reclaimed);
1768 			} else {
1769 				IWL_DEBUG_TX_REPLY(mvm,
1770 						   "NDP - don't update next_reclaimed\n");
1771 			}
1772 
1773 			iwl_mvm_check_ratid_empty(mvm, sta, tid);
1774 
1775 			if (mvmsta->sleep_tx_count) {
1776 				mvmsta->sleep_tx_count--;
1777 				if (mvmsta->sleep_tx_count &&
1778 				    !iwl_mvm_tid_queued(mvm, tid_data)) {
1779 					/*
1780 					 * The number of frames in the queue
1781 					 * dropped to 0 even if we sent less
1782 					 * frames than we thought we had on the
1783 					 * Tx queue.
1784 					 * This means we had holes in the BA
1785 					 * window that we just filled, ask
1786 					 * mac80211 to send EOSP since the
1787 					 * firmware won't know how to do that.
1788 					 * Send NDP and the firmware will send
1789 					 * EOSP notification that will trigger
1790 					 * a call to ieee80211_sta_eosp().
1791 					 */
1792 					send_eosp_ndp = true;
1793 				}
1794 			}
1795 
1796 			spin_unlock_bh(&mvmsta->lock);
1797 			if (send_eosp_ndp) {
1798 				iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1799 					IEEE80211_FRAME_RELEASE_UAPSD,
1800 					1, tid, false, false);
1801 				mvmsta->sleep_tx_count = 0;
1802 				ieee80211_send_eosp_nullfunc(sta, tid);
1803 			}
1804 		}
1805 
1806 		if (mvmsta->next_status_eosp) {
1807 			mvmsta->next_status_eosp = false;
1808 			ieee80211_sta_eosp(sta);
1809 		}
1810 	}
1811 out:
1812 	rcu_read_unlock();
1813 }
1814 
1815 #ifdef CONFIG_IWLWIFI_DEBUG
1816 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1817 static const char *iwl_get_agg_tx_status(u16 status)
1818 {
1819 	switch (status & AGG_TX_STATE_STATUS_MSK) {
1820 	AGG_TX_STATE_(TRANSMITTED);
1821 	AGG_TX_STATE_(UNDERRUN);
1822 	AGG_TX_STATE_(BT_PRIO);
1823 	AGG_TX_STATE_(FEW_BYTES);
1824 	AGG_TX_STATE_(ABORT);
1825 	AGG_TX_STATE_(TX_ON_AIR_DROP);
1826 	AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1827 	AGG_TX_STATE_(LAST_SENT_BT_KILL);
1828 	AGG_TX_STATE_(SCD_QUERY);
1829 	AGG_TX_STATE_(TEST_BAD_CRC32);
1830 	AGG_TX_STATE_(RESPONSE);
1831 	AGG_TX_STATE_(DUMP_TX);
1832 	AGG_TX_STATE_(DELAY_TX);
1833 	}
1834 
1835 	return "UNKNOWN";
1836 }
1837 
1838 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1839 				      struct iwl_rx_packet *pkt)
1840 {
1841 	struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1842 	struct agg_tx_status *frame_status =
1843 		iwl_mvm_get_agg_status(mvm, tx_resp);
1844 	int i;
1845 	bool tirgger_timepoint = false;
1846 
1847 	for (i = 0; i < tx_resp->frame_count; i++) {
1848 		u16 fstatus = le16_to_cpu(frame_status[i].status);
1849 		/* In case one frame wasn't transmitted trigger time point */
1850 		tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) !=
1851 				      AGG_TX_STATE_TRANSMITTED);
1852 		IWL_DEBUG_TX_REPLY(mvm,
1853 				   "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1854 				   iwl_get_agg_tx_status(fstatus),
1855 				   fstatus & AGG_TX_STATE_STATUS_MSK,
1856 				   (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1857 					AGG_TX_STATE_TRY_CNT_POS,
1858 				   le16_to_cpu(frame_status[i].sequence));
1859 	}
1860 
1861 	if (tirgger_timepoint)
1862 		iwl_dbg_tlv_time_point(&mvm->fwrt,
1863 				       IWL_FW_INI_TIME_POINT_TX_FAILED, NULL);
1864 
1865 }
1866 #else
1867 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1868 				      struct iwl_rx_packet *pkt)
1869 {}
1870 #endif /* CONFIG_IWLWIFI_DEBUG */
1871 
1872 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1873 				  struct iwl_rx_packet *pkt)
1874 {
1875 	struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1876 	int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1877 	int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1878 	u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1879 	struct iwl_mvm_sta *mvmsta;
1880 	int queue = SEQ_TO_QUEUE(sequence);
1881 	struct ieee80211_sta *sta;
1882 
1883 	if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1884 			 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1885 		return;
1886 
1887 	iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1888 
1889 	rcu_read_lock();
1890 
1891 	mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1892 
1893 	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1894 	if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta) || !sta->wme)) {
1895 		rcu_read_unlock();
1896 		return;
1897 	}
1898 
1899 	if (!WARN_ON_ONCE(!mvmsta)) {
1900 		mvmsta->tid_data[tid].rate_n_flags =
1901 			le32_to_cpu(tx_resp->initial_rate);
1902 		mvmsta->tid_data[tid].tx_time =
1903 			le16_to_cpu(tx_resp->wireless_media_time);
1904 		mvmsta->tid_data[tid].lq_color =
1905 			TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1906 		iwl_mvm_tx_airtime(mvm, mvmsta,
1907 				   le16_to_cpu(tx_resp->wireless_media_time));
1908 	}
1909 
1910 	rcu_read_unlock();
1911 }
1912 
1913 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1914 {
1915 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
1916 	struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1917 
1918 	if (tx_resp->frame_count == 1)
1919 		iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1920 	else
1921 		iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1922 }
1923 
1924 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1925 			       int txq, int index,
1926 			       struct ieee80211_tx_info *tx_info, u32 rate,
1927 			       bool is_flush)
1928 {
1929 	struct sk_buff_head reclaimed_skbs;
1930 	struct iwl_mvm_tid_data *tid_data = NULL;
1931 	struct ieee80211_sta *sta;
1932 	struct iwl_mvm_sta *mvmsta = NULL;
1933 	struct sk_buff *skb;
1934 	int freed;
1935 
1936 	if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations ||
1937 		      tid > IWL_MAX_TID_COUNT,
1938 		      "sta_id %d tid %d", sta_id, tid))
1939 		return;
1940 
1941 	rcu_read_lock();
1942 
1943 	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1944 
1945 	/* Reclaiming frames for a station that has been deleted ? */
1946 	if (WARN_ON_ONCE(!sta)) {
1947 		rcu_read_unlock();
1948 		return;
1949 	}
1950 
1951 	__skb_queue_head_init(&reclaimed_skbs);
1952 
1953 	/*
1954 	 * Release all TFDs before the SSN, i.e. all TFDs in front of
1955 	 * block-ack window (we assume that they've been successfully
1956 	 * transmitted ... if not, it's too late anyway).
1957 	 */
1958 	iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs, is_flush);
1959 
1960 	skb_queue_walk(&reclaimed_skbs, skb) {
1961 		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1962 
1963 		iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1964 
1965 		memset(&info->status, 0, sizeof(info->status));
1966 		/* Packet was transmitted successfully, failures come as single
1967 		 * frames because before failing a frame the firmware transmits
1968 		 * it without aggregation at least once.
1969 		 */
1970 		if (!is_flush)
1971 			info->flags |= IEEE80211_TX_STAT_ACK;
1972 		else
1973 			info->flags &= ~IEEE80211_TX_STAT_ACK;
1974 	}
1975 
1976 	/*
1977 	 * It's possible to get a BA response after invalidating the rcu (rcu is
1978 	 * invalidated in order to prevent new Tx from being sent, but there may
1979 	 * be some frames already in-flight).
1980 	 * In this case we just want to reclaim, and could skip all the
1981 	 * sta-dependent stuff since it's in the middle of being removed
1982 	 * anyways.
1983 	 */
1984 	if (IS_ERR(sta))
1985 		goto out;
1986 
1987 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
1988 	tid_data = &mvmsta->tid_data[tid];
1989 
1990 	if (tid_data->txq_id != txq) {
1991 		IWL_ERR(mvm,
1992 			"invalid reclaim request: Q %d, tid %d\n",
1993 			tid_data->txq_id, tid);
1994 		rcu_read_unlock();
1995 		return;
1996 	}
1997 
1998 	spin_lock_bh(&mvmsta->lock);
1999 
2000 	tid_data->next_reclaimed = index;
2001 
2002 	iwl_mvm_check_ratid_empty(mvm, sta, tid);
2003 
2004 	freed = 0;
2005 
2006 	/* pack lq color from tid_data along the reduced txp */
2007 	tx_info->status.status_driver_data[0] =
2008 		RS_DRV_DATA_PACK(tid_data->lq_color,
2009 				 tx_info->status.status_driver_data[0]);
2010 	tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
2011 
2012 	skb_queue_walk(&reclaimed_skbs, skb) {
2013 		struct ieee80211_hdr *hdr = (void *)skb->data;
2014 		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2015 
2016 		if (!is_flush) {
2017 			if (ieee80211_is_data_qos(hdr->frame_control))
2018 				freed++;
2019 			else
2020 				WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
2021 		}
2022 
2023 		/* this is the first skb we deliver in this batch */
2024 		/* put the rate scaling data there */
2025 		if (freed == 1) {
2026 			info->flags |= IEEE80211_TX_STAT_AMPDU;
2027 			memcpy(&info->status, &tx_info->status,
2028 			       sizeof(tx_info->status));
2029 			iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info);
2030 		}
2031 	}
2032 
2033 	spin_unlock_bh(&mvmsta->lock);
2034 
2035 	/* We got a BA notif with 0 acked or scd_ssn didn't progress which is
2036 	 * possible (i.e. first MPDU in the aggregation wasn't acked)
2037 	 * Still it's important to update RS about sent vs. acked.
2038 	 */
2039 	if (!is_flush && skb_queue_empty(&reclaimed_skbs) &&
2040 	    !iwl_mvm_has_tlc_offload(mvm)) {
2041 		struct ieee80211_chanctx_conf *chanctx_conf = NULL;
2042 
2043 		/* no TLC offload, so non-MLD mode */
2044 		if (mvmsta->vif)
2045 			chanctx_conf =
2046 				rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf);
2047 
2048 		if (WARN_ON_ONCE(!chanctx_conf))
2049 			goto out;
2050 
2051 		tx_info->band = chanctx_conf->def.chan->band;
2052 		iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info);
2053 
2054 		IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
2055 		iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false);
2056 	}
2057 
2058 out:
2059 	rcu_read_unlock();
2060 
2061 	while (!skb_queue_empty(&reclaimed_skbs)) {
2062 		skb = __skb_dequeue(&reclaimed_skbs);
2063 		ieee80211_tx_status(mvm->hw, skb);
2064 	}
2065 }
2066 
2067 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
2068 {
2069 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
2070 	unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
2071 	int sta_id, tid, txq, index;
2072 	struct ieee80211_tx_info ba_info = {};
2073 	struct iwl_mvm_ba_notif *ba_notif;
2074 	struct iwl_mvm_tid_data *tid_data;
2075 	struct iwl_mvm_sta *mvmsta;
2076 
2077 	ba_info.flags = IEEE80211_TX_STAT_AMPDU;
2078 
2079 	if (iwl_mvm_has_new_tx_api(mvm)) {
2080 		struct iwl_mvm_compressed_ba_notif *ba_res =
2081 			(void *)pkt->data;
2082 		u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
2083 		u16 tfd_cnt;
2084 		int i;
2085 
2086 		if (IWL_FW_CHECK(mvm, sizeof(*ba_res) > pkt_len,
2087 				 "short BA notification (%d)\n", pkt_len))
2088 			return;
2089 
2090 		sta_id = ba_res->sta_id;
2091 		ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
2092 		ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
2093 		ba_info.status.tx_time =
2094 			(u16)le32_to_cpu(ba_res->wireless_time);
2095 		ba_info.status.status_driver_data[0] =
2096 			(void *)(uintptr_t)ba_res->reduced_txp;
2097 
2098 		tfd_cnt = le16_to_cpu(ba_res->tfd_cnt);
2099 		if (!tfd_cnt)
2100 			return;
2101 
2102 		if (IWL_FW_CHECK(mvm,
2103 				 struct_size(ba_res, tfd, tfd_cnt) > pkt_len,
2104 				 "short BA notification (tfds:%d, size:%d)\n",
2105 				 tfd_cnt, pkt_len))
2106 			return;
2107 
2108 		rcu_read_lock();
2109 
2110 		mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2111 		/*
2112 		 * It's possible to get a BA response after invalidating the rcu
2113 		 * (rcu is invalidated in order to prevent new Tx from being
2114 		 * sent, but there may be some frames already in-flight).
2115 		 * In this case we just want to reclaim, and could skip all the
2116 		 * sta-dependent stuff since it's in the middle of being removed
2117 		 * anyways.
2118 		 */
2119 
2120 		/* Free per TID */
2121 		for (i = 0; i < tfd_cnt; i++) {
2122 			struct iwl_mvm_compressed_ba_tfd *ba_tfd =
2123 				&ba_res->tfd[i];
2124 
2125 			tid = ba_tfd->tid;
2126 			if (tid == IWL_MGMT_TID)
2127 				tid = IWL_MAX_TID_COUNT;
2128 
2129 			if (mvmsta)
2130 				mvmsta->tid_data[i].lq_color = lq_color;
2131 
2132 			iwl_mvm_tx_reclaim(mvm, sta_id, tid,
2133 					   (int)(le16_to_cpu(ba_tfd->q_num)),
2134 					   le16_to_cpu(ba_tfd->tfd_index),
2135 					   &ba_info,
2136 					   le32_to_cpu(ba_res->tx_rate), false);
2137 		}
2138 
2139 		if (mvmsta)
2140 			iwl_mvm_tx_airtime(mvm, mvmsta,
2141 					   le32_to_cpu(ba_res->wireless_time));
2142 		rcu_read_unlock();
2143 
2144 		IWL_DEBUG_TX_REPLY(mvm,
2145 				   "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
2146 				   sta_id, le32_to_cpu(ba_res->flags),
2147 				   le16_to_cpu(ba_res->txed),
2148 				   le16_to_cpu(ba_res->done));
2149 		return;
2150 	}
2151 
2152 	ba_notif = (void *)pkt->data;
2153 	sta_id = ba_notif->sta_id;
2154 	tid = ba_notif->tid;
2155 	/* "flow" corresponds to Tx queue */
2156 	txq = le16_to_cpu(ba_notif->scd_flow);
2157 	/* "ssn" is start of block-ack Tx window, corresponds to index
2158 	 * (in Tx queue's circular buffer) of first TFD/frame in window */
2159 	index = le16_to_cpu(ba_notif->scd_ssn);
2160 
2161 	rcu_read_lock();
2162 	mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2163 	if (IWL_FW_CHECK(mvm, !mvmsta,
2164 			 "invalid STA ID %d in BA notif\n",
2165 			 sta_id)) {
2166 		rcu_read_unlock();
2167 		return;
2168 	}
2169 
2170 	tid_data = &mvmsta->tid_data[tid];
2171 
2172 	ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
2173 	ba_info.status.ampdu_len = ba_notif->txed;
2174 	ba_info.status.tx_time = tid_data->tx_time;
2175 	ba_info.status.status_driver_data[0] =
2176 		(void *)(uintptr_t)ba_notif->reduced_txp;
2177 
2178 	rcu_read_unlock();
2179 
2180 	iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
2181 			   tid_data->rate_n_flags, false);
2182 
2183 	IWL_DEBUG_TX_REPLY(mvm,
2184 			   "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
2185 			   ba_notif->sta_addr, ba_notif->sta_id);
2186 
2187 	IWL_DEBUG_TX_REPLY(mvm,
2188 			   "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
2189 			   ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
2190 			   le64_to_cpu(ba_notif->bitmap), txq, index,
2191 			   ba_notif->txed, ba_notif->txed_2_done);
2192 
2193 	IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
2194 			   ba_notif->reduced_txp);
2195 }
2196 
2197 /*
2198  * Note that there are transports that buffer frames before they reach
2199  * the firmware. This means that after flush_tx_path is called, the
2200  * queue might not be empty. The race-free way to handle this is to:
2201  * 1) set the station as draining
2202  * 2) flush the Tx path
2203  * 3) wait for the transport queues to be empty
2204  */
2205 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk)
2206 {
2207 	int ret;
2208 	struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
2209 		.queues_ctl = cpu_to_le32(tfd_msk),
2210 		.flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
2211 	};
2212 
2213 	WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2214 	ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0,
2215 				   sizeof(flush_cmd), &flush_cmd);
2216 	if (ret)
2217 		IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2218 	return ret;
2219 }
2220 
2221 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids)
2222 {
2223 	int ret;
2224 	struct iwl_tx_path_flush_cmd_rsp *rsp;
2225 	struct iwl_tx_path_flush_cmd flush_cmd = {
2226 		.sta_id = cpu_to_le32(sta_id),
2227 		.tid_mask = cpu_to_le16(tids),
2228 	};
2229 
2230 	struct iwl_host_cmd cmd = {
2231 		.id = TXPATH_FLUSH,
2232 		.len = { sizeof(flush_cmd), },
2233 		.data = { &flush_cmd, },
2234 	};
2235 
2236 	WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2237 
2238 	if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0)
2239 		cmd.flags |= CMD_WANT_SKB | CMD_SEND_IN_RFKILL;
2240 
2241 	IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n",
2242 			    sta_id, tids);
2243 
2244 	ret = iwl_mvm_send_cmd(mvm, &cmd);
2245 
2246 	if (ret) {
2247 		IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2248 		return ret;
2249 	}
2250 
2251 	if (cmd.flags & CMD_WANT_SKB) {
2252 		int i;
2253 		int num_flushed_queues;
2254 
2255 		if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) {
2256 			ret = -EIO;
2257 			goto free_rsp;
2258 		}
2259 
2260 		rsp = (void *)cmd.resp_pkt->data;
2261 
2262 		if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id,
2263 			      "sta_id %d != rsp_sta_id %d",
2264 			      sta_id, le16_to_cpu(rsp->sta_id))) {
2265 			ret = -EIO;
2266 			goto free_rsp;
2267 		}
2268 
2269 		num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues);
2270 		if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP,
2271 			      "num_flushed_queues %d", num_flushed_queues)) {
2272 			ret = -EIO;
2273 			goto free_rsp;
2274 		}
2275 
2276 		for (i = 0; i < num_flushed_queues; i++) {
2277 			struct ieee80211_tx_info tx_info = {};
2278 			struct iwl_flush_queue_info *queue_info = &rsp->queues[i];
2279 			int tid = le16_to_cpu(queue_info->tid);
2280 			int read_before = le16_to_cpu(queue_info->read_before_flush);
2281 			int read_after = le16_to_cpu(queue_info->read_after_flush);
2282 			int queue_num = le16_to_cpu(queue_info->queue_num);
2283 
2284 			if (tid == IWL_MGMT_TID)
2285 				tid = IWL_MAX_TID_COUNT;
2286 
2287 			IWL_DEBUG_TX_QUEUES(mvm,
2288 					    "tid %d queue_id %d read-before %d read-after %d\n",
2289 					    tid, queue_num, read_before, read_after);
2290 
2291 			iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after,
2292 					   &tx_info, 0, true);
2293 		}
2294 free_rsp:
2295 		iwl_free_resp(&cmd);
2296 	}
2297 	return ret;
2298 }
2299 
2300 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, u32 sta_id, u32 tfd_queue_mask)
2301 {
2302 	if (iwl_mvm_has_new_tx_api(mvm))
2303 		return iwl_mvm_flush_sta_tids(mvm, sta_id, 0xffff);
2304 
2305 	return iwl_mvm_flush_tx_path(mvm, tfd_queue_mask);
2306 }
2307