1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3  * Copyright (C) 2012-2014, 2018-2022 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/ip.h>
11 #include <net/ipv6.h>
12 
13 #include "iwl-trans.h"
14 #include "iwl-eeprom-parse.h"
15 #include "mvm.h"
16 #include "sta.h"
17 
18 static void
19 iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
20 			  u16 tid, u16 ssn)
21 {
22 	struct iwl_fw_dbg_trigger_tlv *trig;
23 	struct iwl_fw_dbg_trigger_ba *ba_trig;
24 
25 	trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA);
26 	if (!trig)
27 		return;
28 
29 	ba_trig = (void *)trig->data;
30 
31 	if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid)))
32 		return;
33 
34 	iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
35 				"BAR sent to %pM, tid %d, ssn %d",
36 				addr, tid, ssn);
37 }
38 
39 #define OPT_HDR(type, skb, off) \
40 	(type *)(skb_network_header(skb) + (off))
41 
42 static u16 iwl_mvm_tx_csum_pre_bz(struct iwl_mvm *mvm, struct sk_buff *skb,
43 				  struct ieee80211_tx_info *info, bool amsdu)
44 {
45 	struct ieee80211_hdr *hdr = (void *)skb->data;
46 	u16 offload_assist = 0;
47 #if IS_ENABLED(CONFIG_INET)
48 	u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
49 	u8 protocol = 0;
50 
51 	/* Do not compute checksum if already computed */
52 	if (skb->ip_summed != CHECKSUM_PARTIAL)
53 		goto out;
54 
55 	/* We do not expect to be requested to csum stuff we do not support */
56 	if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
57 		      (skb->protocol != htons(ETH_P_IP) &&
58 		       skb->protocol != htons(ETH_P_IPV6)),
59 		      "No support for requested checksum\n")) {
60 		skb_checksum_help(skb);
61 		goto out;
62 	}
63 
64 	if (skb->protocol == htons(ETH_P_IP)) {
65 		protocol = ip_hdr(skb)->protocol;
66 	} else {
67 #if IS_ENABLED(CONFIG_IPV6)
68 		struct ipv6hdr *ipv6h =
69 			(struct ipv6hdr *)skb_network_header(skb);
70 		unsigned int off = sizeof(*ipv6h);
71 
72 		protocol = ipv6h->nexthdr;
73 		while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
74 			struct ipv6_opt_hdr *hp;
75 
76 			/* only supported extension headers */
77 			if (protocol != NEXTHDR_ROUTING &&
78 			    protocol != NEXTHDR_HOP &&
79 			    protocol != NEXTHDR_DEST) {
80 				skb_checksum_help(skb);
81 				goto out;
82 			}
83 
84 			hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
85 			protocol = hp->nexthdr;
86 			off += ipv6_optlen(hp);
87 		}
88 		/* if we get here - protocol now should be TCP/UDP */
89 #endif
90 	}
91 
92 	if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
93 		WARN_ON_ONCE(1);
94 		skb_checksum_help(skb);
95 		goto out;
96 	}
97 
98 	/* enable L4 csum */
99 	offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);
100 
101 	/*
102 	 * Set offset to IP header (snap).
103 	 * We don't support tunneling so no need to take care of inner header.
104 	 * Size is in words.
105 	 */
106 	offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);
107 
108 	/* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
109 	if (skb->protocol == htons(ETH_P_IP) && amsdu) {
110 		ip_hdr(skb)->check = 0;
111 		offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
112 	}
113 
114 	/* reset UDP/TCP header csum */
115 	if (protocol == IPPROTO_TCP)
116 		tcp_hdr(skb)->check = 0;
117 	else
118 		udp_hdr(skb)->check = 0;
119 
120 	/*
121 	 * mac header len should include IV, size is in words unless
122 	 * the IV is added by the firmware like in WEP.
123 	 * In new Tx API, the IV is always added by the firmware.
124 	 */
125 	if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key &&
126 	    info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 &&
127 	    info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104)
128 		mh_len += info->control.hw_key->iv_len;
129 	mh_len /= 2;
130 	offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
131 
132 out:
133 #endif
134 	if (amsdu)
135 		offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
136 	else if (ieee80211_hdrlen(hdr->frame_control) % 4)
137 		/* padding is inserted later in transport */
138 		offload_assist |= BIT(TX_CMD_OFFLD_PAD);
139 
140 	return offload_assist;
141 }
142 
143 u32 iwl_mvm_tx_csum_bz(struct iwl_mvm *mvm, struct sk_buff *skb, bool amsdu)
144 {
145 	struct ieee80211_hdr *hdr = (void *)skb->data;
146 	u32 offload_assist = IWL_TX_CMD_OFFLD_BZ_PARTIAL_CSUM;
147 	unsigned int hdrlen = ieee80211_hdrlen(hdr->frame_control);
148 	unsigned int csum_start = skb_checksum_start_offset(skb);
149 
150 	offload_assist |= u32_encode_bits(hdrlen / 2,
151 					  IWL_TX_CMD_OFFLD_BZ_MH_LEN);
152 	if (amsdu)
153 		offload_assist |= IWL_TX_CMD_OFFLD_BZ_AMSDU;
154 	else if (hdrlen % 4)
155 		/* padding is inserted later in transport */
156 		offload_assist |= IWL_TX_CMD_OFFLD_BZ_MH_PAD;
157 
158 	if (skb->ip_summed != CHECKSUM_PARTIAL)
159 		return offload_assist;
160 
161 	offload_assist |= IWL_TX_CMD_OFFLD_BZ_ENABLE_CSUM |
162 			  IWL_TX_CMD_OFFLD_BZ_ZERO2ONES;
163 
164 	/*
165 	 * mac80211 will always calculate checksum in software for
166 	 * non-fast-xmit, and so we can only do offloaded checksum
167 	 * for fast-xmit frames. In this case, we always have the
168 	 * RFC 1042 header present. skb_checksum_start_offset()
169 	 * returns the offset from the beginning, but the hardware
170 	 * needs it from after the header & SNAP header.
171 	 */
172 	csum_start -= hdrlen + 8;
173 
174 	offload_assist |= u32_encode_bits(csum_start,
175 					  IWL_TX_CMD_OFFLD_BZ_START_OFFS);
176 	offload_assist |= u32_encode_bits(csum_start + skb->csum_offset,
177 					  IWL_TX_CMD_OFFLD_BZ_RESULT_OFFS);
178 
179 	return offload_assist;
180 }
181 
182 static u32 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
183 			   struct ieee80211_tx_info *info,
184 			   bool amsdu)
185 {
186 	if (mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ ||
187 	    (mvm->trans->trans_cfg->device_family == IWL_DEVICE_FAMILY_BZ &&
188 	     CSR_HW_REV_TYPE(mvm->trans->hw_rev) == IWL_CFG_MAC_TYPE_GL &&
189 	     mvm->trans->hw_rev_step == SILICON_A_STEP))
190 		return iwl_mvm_tx_csum_pre_bz(mvm, skb, info, amsdu);
191 	return iwl_mvm_tx_csum_bz(mvm, skb, amsdu);
192 }
193 
194 /*
195  * Sets most of the Tx cmd's fields
196  */
197 void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
198 			struct iwl_tx_cmd *tx_cmd,
199 			struct ieee80211_tx_info *info, u8 sta_id)
200 {
201 	struct ieee80211_hdr *hdr = (void *)skb->data;
202 	__le16 fc = hdr->frame_control;
203 	u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
204 	u32 len = skb->len + FCS_LEN;
205 	bool amsdu = false;
206 	u8 ac;
207 
208 	if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) ||
209 	    (ieee80211_is_probe_resp(fc) &&
210 	     !is_multicast_ether_addr(hdr->addr1)))
211 		tx_flags |= TX_CMD_FLG_ACK;
212 	else
213 		tx_flags &= ~TX_CMD_FLG_ACK;
214 
215 	if (ieee80211_is_probe_resp(fc))
216 		tx_flags |= TX_CMD_FLG_TSF;
217 
218 	if (ieee80211_has_morefrags(fc))
219 		tx_flags |= TX_CMD_FLG_MORE_FRAG;
220 
221 	if (ieee80211_is_data_qos(fc)) {
222 		u8 *qc = ieee80211_get_qos_ctl(hdr);
223 		tx_cmd->tid_tspec = qc[0] & 0xf;
224 		tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
225 		amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
226 	} else if (ieee80211_is_back_req(fc)) {
227 		struct ieee80211_bar *bar = (void *)skb->data;
228 		u16 control = le16_to_cpu(bar->control);
229 		u16 ssn = le16_to_cpu(bar->start_seq_num);
230 
231 		tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
232 		tx_cmd->tid_tspec = (control &
233 				     IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
234 			IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
235 		WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
236 		iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
237 					  ssn);
238 	} else {
239 		if (ieee80211_is_data(fc))
240 			tx_cmd->tid_tspec = IWL_TID_NON_QOS;
241 		else
242 			tx_cmd->tid_tspec = IWL_MAX_TID_COUNT;
243 
244 		if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
245 			tx_flags |= TX_CMD_FLG_SEQ_CTL;
246 		else
247 			tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
248 	}
249 
250 	/* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */
251 	if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
252 		ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
253 	else
254 		ac = tid_to_mac80211_ac[0];
255 
256 	tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
257 			TX_CMD_FLG_BT_PRIO_POS;
258 
259 	if (ieee80211_is_mgmt(fc)) {
260 		if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
261 			tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
262 		else if (ieee80211_is_action(fc))
263 			tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
264 		else
265 			tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
266 
267 		/* The spec allows Action frames in A-MPDU, we don't support
268 		 * it
269 		 */
270 		WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
271 	} else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
272 		tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
273 	} else {
274 		tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
275 	}
276 
277 	if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
278 	    !is_multicast_ether_addr(hdr->addr1))
279 		tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
280 
281 	if (fw_has_capa(&mvm->fw->ucode_capa,
282 			IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
283 	    ieee80211_action_contains_tpc(skb))
284 		tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
285 
286 	tx_cmd->tx_flags = cpu_to_le32(tx_flags);
287 	/* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
288 	tx_cmd->len = cpu_to_le16((u16)skb->len);
289 	tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
290 	tx_cmd->sta_id = sta_id;
291 
292 	tx_cmd->offload_assist =
293 		cpu_to_le16(iwl_mvm_tx_csum_pre_bz(mvm, skb, info, amsdu));
294 }
295 
296 static u32 iwl_mvm_get_tx_ant(struct iwl_mvm *mvm,
297 			      struct ieee80211_tx_info *info,
298 			      struct ieee80211_sta *sta, __le16 fc)
299 {
300 	if (info->band == NL80211_BAND_2GHZ &&
301 	    !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
302 		return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
303 
304 	if (sta && ieee80211_is_data(fc)) {
305 		struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
306 
307 		return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS;
308 	}
309 
310 	return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
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 	/* info->control is only relevant for non HW rate control */
323 	if (!ieee80211_hw_check(mvm->hw, HAS_RATE_CONTROL)) {
324 		/* HT rate doesn't make sense for a non data frame */
325 		WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS &&
326 			  !ieee80211_is_data(fc),
327 			  "Got a HT rate (flags:0x%x/mcs:%d/fc:0x%x/state:%d) for a non data frame\n",
328 			  info->control.rates[0].flags,
329 			  info->control.rates[0].idx,
330 			  le16_to_cpu(fc),
331 			  sta ? iwl_mvm_sta_from_mac80211(sta)->sta_state : -1);
332 
333 		rate_idx = info->control.rates[0].idx;
334 	}
335 
336 	/* if the rate isn't a well known legacy rate, take the lowest one */
337 	if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY)
338 		rate_idx = rate_lowest_index(
339 				&mvm->nvm_data->bands[info->band], sta);
340 
341 	/*
342 	 * For non 2 GHZ band, remap mac80211 rate
343 	 * indices into driver indices
344 	 */
345 	if (info->band != NL80211_BAND_2GHZ)
346 		rate_idx += IWL_FIRST_OFDM_RATE;
347 
348 	/* For 2.4 GHZ band, check that there is no need to remap */
349 	BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
350 
351 	/* Get PLCP rate for tx_cmd->rate_n_flags */
352 	rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx);
353 	is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE);
354 
355 	/* Set CCK or OFDM flag */
356 	if (iwl_fw_lookup_cmd_ver(mvm->fw, TX_CMD, 0) > 8) {
357 		if (!is_cck)
358 			rate_flags |= RATE_MCS_LEGACY_OFDM_MSK;
359 		else
360 			rate_flags |= RATE_MCS_CCK_MSK;
361 	} else if (is_cck) {
362 		rate_flags |= RATE_MCS_CCK_MSK_V1;
363 	}
364 
365 	return (u32)rate_plcp | rate_flags;
366 }
367 
368 static u32 iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm *mvm,
369 				       struct ieee80211_tx_info *info,
370 				       struct ieee80211_sta *sta, __le16 fc)
371 {
372 	return iwl_mvm_get_tx_rate(mvm, info, sta, fc) |
373 		iwl_mvm_get_tx_ant(mvm, info, sta, fc);
374 }
375 
376 /*
377  * Sets the fields in the Tx cmd that are rate related
378  */
379 void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
380 			    struct ieee80211_tx_info *info,
381 			    struct ieee80211_sta *sta, __le16 fc)
382 {
383 	/* Set retry limit on RTS packets */
384 	tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
385 
386 	/* Set retry limit on DATA packets and Probe Responses*/
387 	if (ieee80211_is_probe_resp(fc)) {
388 		tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
389 		tx_cmd->rts_retry_limit =
390 			min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
391 	} else if (ieee80211_is_back_req(fc)) {
392 		tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
393 	} else {
394 		tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
395 	}
396 
397 	/*
398 	 * for data packets, rate info comes from the table inside the fw. This
399 	 * table is controlled by LINK_QUALITY commands
400 	 */
401 
402 	if (ieee80211_is_data(fc) && sta) {
403 		struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
404 
405 		if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) {
406 			tx_cmd->initial_rate_index = 0;
407 			tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
408 			return;
409 		}
410 	} else if (ieee80211_is_back_req(fc)) {
411 		tx_cmd->tx_flags |=
412 			cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
413 	}
414 
415 	/* Set the rate in the TX cmd */
416 	tx_cmd->rate_n_flags =
417 		cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc));
418 }
419 
420 static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
421 					 u8 *crypto_hdr)
422 {
423 	struct ieee80211_key_conf *keyconf = info->control.hw_key;
424 	u64 pn;
425 
426 	pn = atomic64_inc_return(&keyconf->tx_pn);
427 	crypto_hdr[0] = pn;
428 	crypto_hdr[2] = 0;
429 	crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
430 	crypto_hdr[1] = pn >> 8;
431 	crypto_hdr[4] = pn >> 16;
432 	crypto_hdr[5] = pn >> 24;
433 	crypto_hdr[6] = pn >> 32;
434 	crypto_hdr[7] = pn >> 40;
435 }
436 
437 /*
438  * Sets the fields in the Tx cmd that are crypto related
439  */
440 static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
441 				      struct ieee80211_tx_info *info,
442 				      struct iwl_tx_cmd *tx_cmd,
443 				      struct sk_buff *skb_frag,
444 				      int hdrlen)
445 {
446 	struct ieee80211_key_conf *keyconf = info->control.hw_key;
447 	u8 *crypto_hdr = skb_frag->data + hdrlen;
448 	enum iwl_tx_cmd_sec_ctrl type = TX_CMD_SEC_CCM;
449 	u64 pn;
450 
451 	switch (keyconf->cipher) {
452 	case WLAN_CIPHER_SUITE_CCMP:
453 		iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
454 		iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
455 		break;
456 
457 	case WLAN_CIPHER_SUITE_TKIP:
458 		tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
459 		pn = atomic64_inc_return(&keyconf->tx_pn);
460 		ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
461 		ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key);
462 		break;
463 
464 	case WLAN_CIPHER_SUITE_WEP104:
465 		tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128;
466 		fallthrough;
467 	case WLAN_CIPHER_SUITE_WEP40:
468 		tx_cmd->sec_ctl |= TX_CMD_SEC_WEP |
469 			((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) &
470 			  TX_CMD_SEC_WEP_KEY_IDX_MSK);
471 
472 		memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen);
473 		break;
474 	case WLAN_CIPHER_SUITE_GCMP:
475 	case WLAN_CIPHER_SUITE_GCMP_256:
476 		type = TX_CMD_SEC_GCMP;
477 		fallthrough;
478 	case WLAN_CIPHER_SUITE_CCMP_256:
479 		/* TODO: Taking the key from the table might introduce a race
480 		 * when PTK rekeying is done, having an old packets with a PN
481 		 * based on the old key but the message encrypted with a new
482 		 * one.
483 		 * Need to handle this.
484 		 */
485 		tx_cmd->sec_ctl |= type | TX_CMD_SEC_KEY_FROM_TABLE;
486 		tx_cmd->key[0] = keyconf->hw_key_idx;
487 		iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
488 		break;
489 	default:
490 		tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
491 	}
492 }
493 
494 /*
495  * Allocates and sets the Tx cmd the driver data pointers in the skb
496  */
497 static struct iwl_device_tx_cmd *
498 iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
499 		      struct ieee80211_tx_info *info, int hdrlen,
500 		      struct ieee80211_sta *sta, u8 sta_id)
501 {
502 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
503 	struct iwl_device_tx_cmd *dev_cmd;
504 	struct iwl_tx_cmd *tx_cmd;
505 
506 	dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
507 
508 	if (unlikely(!dev_cmd))
509 		return NULL;
510 
511 	dev_cmd->hdr.cmd = TX_CMD;
512 
513 	if (iwl_mvm_has_new_tx_api(mvm)) {
514 		u32 rate_n_flags = 0;
515 		u16 flags = 0;
516 		struct iwl_mvm_sta *mvmsta = sta ?
517 			iwl_mvm_sta_from_mac80211(sta) : NULL;
518 		bool amsdu = false;
519 
520 		if (ieee80211_is_data_qos(hdr->frame_control)) {
521 			u8 *qc = ieee80211_get_qos_ctl(hdr);
522 
523 			amsdu = *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT;
524 		}
525 
526 		if (!info->control.hw_key)
527 			flags |= IWL_TX_FLAGS_ENCRYPT_DIS;
528 
529 		/*
530 		 * For data packets rate info comes from the fw. Only
531 		 * set rate/antenna during connection establishment or in case
532 		 * no station is given.
533 		 */
534 		if (!sta || !ieee80211_is_data(hdr->frame_control) ||
535 		    mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
536 			flags |= IWL_TX_FLAGS_CMD_RATE;
537 			rate_n_flags =
538 				iwl_mvm_get_tx_rate_n_flags(mvm, info, sta,
539 							    hdr->frame_control);
540 		}
541 
542 		if (mvm->trans->trans_cfg->device_family >=
543 		    IWL_DEVICE_FAMILY_AX210) {
544 			struct iwl_tx_cmd_gen3 *cmd = (void *)dev_cmd->payload;
545 			u32 offload_assist = iwl_mvm_tx_csum(mvm, skb,
546 							     info, amsdu);
547 
548 			cmd->offload_assist = cpu_to_le32(offload_assist);
549 
550 			/* Total # bytes to be transmitted */
551 			cmd->len = cpu_to_le16((u16)skb->len);
552 
553 			/* Copy MAC header from skb into command buffer */
554 			memcpy(cmd->hdr, hdr, hdrlen);
555 
556 			cmd->flags = cpu_to_le16(flags);
557 			cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
558 		} else {
559 			struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
560 			u16 offload_assist = iwl_mvm_tx_csum_pre_bz(mvm, skb,
561 								    info,
562 								    amsdu);
563 
564 			cmd->offload_assist = cpu_to_le16(offload_assist);
565 
566 			/* Total # bytes to be transmitted */
567 			cmd->len = cpu_to_le16((u16)skb->len);
568 
569 			/* Copy MAC header from skb into command buffer */
570 			memcpy(cmd->hdr, hdr, hdrlen);
571 
572 			cmd->flags = cpu_to_le32(flags);
573 			cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
574 		}
575 		goto out;
576 	}
577 
578 	tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
579 
580 	if (info->control.hw_key)
581 		iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
582 
583 	iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
584 
585 	iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
586 
587 	/* Copy MAC header from skb into command buffer */
588 	memcpy(tx_cmd->hdr, hdr, hdrlen);
589 
590 out:
591 	return dev_cmd;
592 }
593 
594 static void iwl_mvm_skb_prepare_status(struct sk_buff *skb,
595 				       struct iwl_device_tx_cmd *cmd)
596 {
597 	struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
598 
599 	memset(&skb_info->status, 0, sizeof(skb_info->status));
600 	memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
601 
602 	skb_info->driver_data[1] = cmd;
603 }
604 
605 static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
606 				      struct ieee80211_tx_info *info,
607 				      struct ieee80211_hdr *hdr)
608 {
609 	struct iwl_mvm_vif *mvmvif =
610 		iwl_mvm_vif_from_mac80211(info->control.vif);
611 	__le16 fc = hdr->frame_control;
612 
613 	switch (info->control.vif->type) {
614 	case NL80211_IFTYPE_AP:
615 	case NL80211_IFTYPE_ADHOC:
616 		/*
617 		 * Non-bufferable frames use the broadcast station, thus they
618 		 * use the probe queue.
619 		 * Also take care of the case where we send a deauth to a
620 		 * station that we don't have, or similarly an association
621 		 * response (with non-success status) for a station we can't
622 		 * accept.
623 		 * Also, disassociate frames might happen, particular with
624 		 * reason 7 ("Class 3 frame received from nonassociated STA").
625 		 */
626 		if (ieee80211_is_mgmt(fc) &&
627 		    (!ieee80211_is_bufferable_mmpdu(fc) ||
628 		     ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc)))
629 			return mvm->probe_queue;
630 
631 		if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
632 		    is_multicast_ether_addr(hdr->addr1))
633 			return mvmvif->cab_queue;
634 
635 		WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC,
636 			  "fc=0x%02x", le16_to_cpu(fc));
637 		return mvm->probe_queue;
638 	case NL80211_IFTYPE_P2P_DEVICE:
639 		if (ieee80211_is_mgmt(fc))
640 			return mvm->p2p_dev_queue;
641 
642 		WARN_ON_ONCE(1);
643 		return mvm->p2p_dev_queue;
644 	default:
645 		WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
646 		return -1;
647 	}
648 }
649 
650 static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm *mvm,
651 				       struct sk_buff *skb)
652 {
653 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
654 	struct iwl_mvm_vif *mvmvif =
655 		iwl_mvm_vif_from_mac80211(info->control.vif);
656 	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
657 	int base_len = (u8 *)mgmt->u.probe_resp.variable - (u8 *)mgmt;
658 	struct iwl_probe_resp_data *resp_data;
659 	const u8 *ie;
660 	u8 *pos;
661 	u8 match[] = {
662 		(WLAN_OUI_WFA >> 16) & 0xff,
663 		(WLAN_OUI_WFA >> 8) & 0xff,
664 		WLAN_OUI_WFA & 0xff,
665 		WLAN_OUI_TYPE_WFA_P2P,
666 	};
667 
668 	rcu_read_lock();
669 
670 	resp_data = rcu_dereference(mvmvif->probe_resp_data);
671 	if (!resp_data)
672 		goto out;
673 
674 	if (!resp_data->notif.noa_active)
675 		goto out;
676 
677 	ie = cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC,
678 				    mgmt->u.probe_resp.variable,
679 				    skb->len - base_len,
680 				    match, 4, 2);
681 	if (!ie) {
682 		IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
683 		goto out;
684 	}
685 
686 	if (skb_tailroom(skb) < resp_data->noa_len) {
687 		if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
688 			IWL_ERR(mvm,
689 				"Failed to reallocate probe resp\n");
690 			goto out;
691 		}
692 	}
693 
694 	pos = skb_put(skb, resp_data->noa_len);
695 
696 	*pos++ = WLAN_EID_VENDOR_SPECIFIC;
697 	/* Set length of IE body (not including ID and length itself) */
698 	*pos++ = resp_data->noa_len - 2;
699 	*pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
700 	*pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
701 	*pos++ = WLAN_OUI_WFA & 0xff;
702 	*pos++ = WLAN_OUI_TYPE_WFA_P2P;
703 
704 	memcpy(pos, &resp_data->notif.noa_attr,
705 	       resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
706 
707 out:
708 	rcu_read_unlock();
709 }
710 
711 int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
712 {
713 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
714 	struct ieee80211_tx_info info;
715 	struct iwl_device_tx_cmd *dev_cmd;
716 	u8 sta_id;
717 	int hdrlen = ieee80211_hdrlen(hdr->frame_control);
718 	__le16 fc = hdr->frame_control;
719 	bool offchannel = IEEE80211_SKB_CB(skb)->flags &
720 		IEEE80211_TX_CTL_TX_OFFCHAN;
721 	int queue = -1;
722 
723 	if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
724 		return -1;
725 
726 	memcpy(&info, skb->cb, sizeof(info));
727 
728 	if (WARN_ON_ONCE(skb->len > IEEE80211_MAX_DATA_LEN + hdrlen))
729 		return -1;
730 
731 	if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
732 		return -1;
733 
734 	if (info.control.vif) {
735 		struct iwl_mvm_vif *mvmvif =
736 			iwl_mvm_vif_from_mac80211(info.control.vif);
737 
738 		if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
739 		    info.control.vif->type == NL80211_IFTYPE_AP ||
740 		    info.control.vif->type == NL80211_IFTYPE_ADHOC) {
741 			if (!ieee80211_is_data(hdr->frame_control))
742 				sta_id = mvmvif->bcast_sta.sta_id;
743 			else
744 				sta_id = mvmvif->mcast_sta.sta_id;
745 
746 			queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr);
747 		} else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
748 			queue = mvm->snif_queue;
749 			sta_id = mvm->snif_sta.sta_id;
750 		} else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
751 			   offchannel) {
752 			/*
753 			 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
754 			 * that can be used in 2 different types of vifs, P2P &
755 			 * STATION.
756 			 * P2P uses the offchannel queue.
757 			 * STATION (HS2.0) uses the auxiliary context of the FW,
758 			 * and hence needs to be sent on the aux queue.
759 			 */
760 			sta_id = mvm->aux_sta.sta_id;
761 			queue = mvm->aux_queue;
762 		}
763 	}
764 
765 	if (queue < 0) {
766 		IWL_ERR(mvm, "No queue was found. Dropping TX\n");
767 		return -1;
768 	}
769 
770 	if (unlikely(ieee80211_is_probe_resp(fc)))
771 		iwl_mvm_probe_resp_set_noa(mvm, skb);
772 
773 	IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
774 
775 	dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
776 	if (!dev_cmd)
777 		return -1;
778 
779 	/* From now on, we cannot access info->control */
780 	iwl_mvm_skb_prepare_status(skb, dev_cmd);
781 
782 	if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
783 		iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
784 		return -1;
785 	}
786 
787 	return 0;
788 }
789 
790 unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm *mvm,
791 				    struct ieee80211_sta *sta, unsigned int tid)
792 {
793 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
794 	enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band;
795 	u8 ac = tid_to_mac80211_ac[tid];
796 	unsigned int txf;
797 	int lmac = iwl_mvm_get_lmac_id(mvm->fw, band);
798 
799 	/* For HE redirect to trigger based fifos */
800 	if (sta->deflink.he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm)))
801 		ac += 4;
802 
803 	txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
804 
805 	/*
806 	 * Don't send an AMSDU that will be longer than the TXF.
807 	 * Add a security margin of 256 for the TX command + headers.
808 	 * We also want to have the start of the next packet inside the
809 	 * fifo to be able to send bursts.
810 	 */
811 	return min_t(unsigned int, mvmsta->max_amsdu_len,
812 		     mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
813 }
814 
815 #ifdef CONFIG_INET
816 
817 static int
818 iwl_mvm_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
819 		       netdev_features_t netdev_flags,
820 		       struct sk_buff_head *mpdus_skb)
821 {
822 	struct sk_buff *tmp, *next;
823 	struct ieee80211_hdr *hdr = (void *)skb->data;
824 	char cb[sizeof(skb->cb)];
825 	u16 i = 0;
826 	unsigned int tcp_payload_len;
827 	unsigned int mss = skb_shinfo(skb)->gso_size;
828 	bool ipv4 = (skb->protocol == htons(ETH_P_IP));
829 	bool qos = ieee80211_is_data_qos(hdr->frame_control);
830 	u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
831 
832 	skb_shinfo(skb)->gso_size = num_subframes * mss;
833 	memcpy(cb, skb->cb, sizeof(cb));
834 
835 	next = skb_gso_segment(skb, netdev_flags);
836 	skb_shinfo(skb)->gso_size = mss;
837 	skb_shinfo(skb)->gso_type = ipv4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
838 	if (WARN_ON_ONCE(IS_ERR(next)))
839 		return -EINVAL;
840 	else if (next)
841 		consume_skb(skb);
842 
843 	skb_list_walk_safe(next, tmp, next) {
844 		memcpy(tmp->cb, cb, sizeof(tmp->cb));
845 		/*
846 		 * Compute the length of all the data added for the A-MSDU.
847 		 * This will be used to compute the length to write in the TX
848 		 * command. We have: SNAP + IP + TCP for n -1 subframes and
849 		 * ETH header for n subframes.
850 		 */
851 		tcp_payload_len = skb_tail_pointer(tmp) -
852 			skb_transport_header(tmp) -
853 			tcp_hdrlen(tmp) + tmp->data_len;
854 
855 		if (ipv4)
856 			ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
857 
858 		if (tcp_payload_len > mss) {
859 			skb_shinfo(tmp)->gso_size = mss;
860 			skb_shinfo(tmp)->gso_type = ipv4 ? SKB_GSO_TCPV4 :
861 							   SKB_GSO_TCPV6;
862 		} else {
863 			if (qos) {
864 				u8 *qc;
865 
866 				if (ipv4)
867 					ip_send_check(ip_hdr(tmp));
868 
869 				qc = ieee80211_get_qos_ctl((void *)tmp->data);
870 				*qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
871 			}
872 			skb_shinfo(tmp)->gso_size = 0;
873 		}
874 
875 		skb_mark_not_on_list(tmp);
876 		__skb_queue_tail(mpdus_skb, tmp);
877 		i++;
878 	}
879 
880 	return 0;
881 }
882 
883 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
884 			  struct ieee80211_tx_info *info,
885 			  struct ieee80211_sta *sta,
886 			  struct sk_buff_head *mpdus_skb)
887 {
888 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
889 	struct ieee80211_hdr *hdr = (void *)skb->data;
890 	unsigned int mss = skb_shinfo(skb)->gso_size;
891 	unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
892 	u16 snap_ip_tcp, pad;
893 	netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
894 	u8 tid;
895 
896 	snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
897 		tcp_hdrlen(skb);
898 
899 	if (!mvmsta->max_amsdu_len ||
900 	    !ieee80211_is_data_qos(hdr->frame_control) ||
901 	    !mvmsta->amsdu_enabled)
902 		return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
903 
904 	/*
905 	 * Do not build AMSDU for IPv6 with extension headers.
906 	 * ask stack to segment and checkum the generated MPDUs for us.
907 	 */
908 	if (skb->protocol == htons(ETH_P_IPV6) &&
909 	    ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
910 	    IPPROTO_TCP) {
911 		netdev_flags &= ~NETIF_F_CSUM_MASK;
912 		return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
913 	}
914 
915 	tid = ieee80211_get_tid(hdr);
916 	if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
917 		return -EINVAL;
918 
919 	/*
920 	 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
921 	 * during an BA session.
922 	 */
923 	if ((info->flags & IEEE80211_TX_CTL_AMPDU &&
924 	     !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) ||
925 	    !(mvmsta->amsdu_enabled & BIT(tid)))
926 		return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
927 
928 	/*
929 	 * Take the min of ieee80211 station and mvm station
930 	 */
931 	max_amsdu_len =
932 		min_t(unsigned int, sta->cur->max_amsdu_len,
933 		      iwl_mvm_max_amsdu_size(mvm, sta, tid));
934 
935 	/*
936 	 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
937 	 * supported. This is a spec requirement (IEEE 802.11-2015
938 	 * section 8.7.3 NOTE 3).
939 	 */
940 	if (info->flags & IEEE80211_TX_CTL_AMPDU &&
941 	    !sta->deflink.vht_cap.vht_supported)
942 		max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
943 
944 	/* Sub frame header + SNAP + IP header + TCP header + MSS */
945 	subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
946 	pad = (4 - subf_len) & 0x3;
947 
948 	/*
949 	 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
950 	 * N * subf_len + (N - 1) * pad.
951 	 */
952 	num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
953 
954 	if (sta->max_amsdu_subframes &&
955 	    num_subframes > sta->max_amsdu_subframes)
956 		num_subframes = sta->max_amsdu_subframes;
957 
958 	tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
959 		tcp_hdrlen(skb) + skb->data_len;
960 
961 	/*
962 	 * Make sure we have enough TBs for the A-MSDU:
963 	 *	2 for each subframe
964 	 *	1 more for each fragment
965 	 *	1 more for the potential data in the header
966 	 */
967 	if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) >
968 	    mvm->trans->max_skb_frags)
969 		num_subframes = 1;
970 
971 	if (num_subframes > 1)
972 		*ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
973 
974 	/* This skb fits in one single A-MSDU */
975 	if (num_subframes * mss >= tcp_payload_len) {
976 		__skb_queue_tail(mpdus_skb, skb);
977 		return 0;
978 	}
979 
980 	/*
981 	 * Trick the segmentation function to make it
982 	 * create SKBs that can fit into one A-MSDU.
983 	 */
984 	return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags,
985 				      mpdus_skb);
986 }
987 #else /* CONFIG_INET */
988 static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
989 			  struct ieee80211_tx_info *info,
990 			  struct ieee80211_sta *sta,
991 			  struct sk_buff_head *mpdus_skb)
992 {
993 	/* Impossible to get TSO with CONFIG_INET */
994 	WARN_ON(1);
995 
996 	return -1;
997 }
998 #endif
999 
1000 /* Check if there are any timed-out TIDs on a given shared TXQ */
1001 static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id)
1002 {
1003 	unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
1004 	unsigned long now = jiffies;
1005 	int tid;
1006 
1007 	if (WARN_ON(iwl_mvm_has_new_tx_api(mvm)))
1008 		return false;
1009 
1010 	for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
1011 		if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] +
1012 				IWL_MVM_DQA_QUEUE_TIMEOUT, now))
1013 			return true;
1014 	}
1015 
1016 	return false;
1017 }
1018 
1019 static void iwl_mvm_tx_airtime(struct iwl_mvm *mvm,
1020 			       struct iwl_mvm_sta *mvmsta,
1021 			       int airtime)
1022 {
1023 	int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1024 	struct iwl_mvm_tcm_mac *mdata;
1025 
1026 	if (mac >= NUM_MAC_INDEX_DRIVER)
1027 		return;
1028 
1029 	mdata = &mvm->tcm.data[mac];
1030 
1031 	if (mvm->tcm.paused)
1032 		return;
1033 
1034 	if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD))
1035 		schedule_delayed_work(&mvm->tcm.work, 0);
1036 
1037 	mdata->tx.airtime += airtime;
1038 }
1039 
1040 static int iwl_mvm_tx_pkt_queued(struct iwl_mvm *mvm,
1041 				 struct iwl_mvm_sta *mvmsta, int tid)
1042 {
1043 	u32 ac = tid_to_mac80211_ac[tid];
1044 	int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
1045 	struct iwl_mvm_tcm_mac *mdata;
1046 
1047 	if (mac >= NUM_MAC_INDEX_DRIVER)
1048 		return -EINVAL;
1049 
1050 	mdata = &mvm->tcm.data[mac];
1051 
1052 	mdata->tx.pkts[ac]++;
1053 
1054 	return 0;
1055 }
1056 
1057 /*
1058  * Sets the fields in the Tx cmd that are crypto related.
1059  *
1060  * This function must be called with BHs disabled.
1061  */
1062 static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
1063 			   struct ieee80211_tx_info *info,
1064 			   struct ieee80211_sta *sta)
1065 {
1066 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1067 	struct iwl_mvm_sta *mvmsta;
1068 	struct iwl_device_tx_cmd *dev_cmd;
1069 	__le16 fc;
1070 	u16 seq_number = 0;
1071 	u8 tid = IWL_MAX_TID_COUNT;
1072 	u16 txq_id;
1073 	bool is_ampdu = false;
1074 	int hdrlen;
1075 
1076 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
1077 	fc = hdr->frame_control;
1078 	hdrlen = ieee80211_hdrlen(fc);
1079 
1080 	if (IWL_MVM_NON_TRANSMITTING_AP && ieee80211_is_probe_resp(fc))
1081 		return -1;
1082 
1083 	if (WARN_ON_ONCE(!mvmsta))
1084 		return -1;
1085 
1086 	if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1087 		return -1;
1088 
1089 	if (unlikely(ieee80211_is_any_nullfunc(fc)) && sta->deflink.he_cap.has_he)
1090 		return -1;
1091 
1092 	if (unlikely(ieee80211_is_probe_resp(fc)))
1093 		iwl_mvm_probe_resp_set_noa(mvm, skb);
1094 
1095 	dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
1096 					sta, mvmsta->sta_id);
1097 	if (!dev_cmd)
1098 		goto drop;
1099 
1100 	/*
1101 	 * we handle that entirely ourselves -- for uAPSD the firmware
1102 	 * will always send a notification, and for PS-Poll responses
1103 	 * we'll notify mac80211 when getting frame status
1104 	 */
1105 	info->flags &= ~IEEE80211_TX_STATUS_EOSP;
1106 
1107 	spin_lock(&mvmsta->lock);
1108 
1109 	/* nullfunc frames should go to the MGMT queue regardless of QOS,
1110 	 * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
1111 	 * assignment of MGMT TID
1112 	 */
1113 	if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
1114 		tid = ieee80211_get_tid(hdr);
1115 		if (WARN_ONCE(tid >= IWL_MAX_TID_COUNT, "Invalid TID %d", tid))
1116 			goto drop_unlock_sta;
1117 
1118 		is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
1119 		if (WARN_ONCE(is_ampdu &&
1120 			      mvmsta->tid_data[tid].state != IWL_AGG_ON,
1121 			      "Invalid internal agg state %d for TID %d",
1122 			       mvmsta->tid_data[tid].state, tid))
1123 			goto drop_unlock_sta;
1124 
1125 		seq_number = mvmsta->tid_data[tid].seq_number;
1126 		seq_number &= IEEE80211_SCTL_SEQ;
1127 
1128 		if (!iwl_mvm_has_new_tx_api(mvm)) {
1129 			struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload;
1130 
1131 			hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1132 			hdr->seq_ctrl |= cpu_to_le16(seq_number);
1133 			/* update the tx_cmd hdr as it was already copied */
1134 			tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
1135 		}
1136 	} else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) {
1137 		tid = IWL_TID_NON_QOS;
1138 	}
1139 
1140 	txq_id = mvmsta->tid_data[tid].txq_id;
1141 
1142 	WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
1143 
1144 	if (WARN_ONCE(txq_id == IWL_MVM_INVALID_QUEUE, "Invalid TXQ id")) {
1145 		iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1146 		spin_unlock(&mvmsta->lock);
1147 		return -1;
1148 	}
1149 
1150 	if (!iwl_mvm_has_new_tx_api(mvm)) {
1151 		/* Keep track of the time of the last frame for this RA/TID */
1152 		mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
1153 
1154 		/*
1155 		 * If we have timed-out TIDs - schedule the worker that will
1156 		 * reconfig the queues and update them
1157 		 *
1158 		 * Note that the no lock is taken here in order to not serialize
1159 		 * the TX flow. This isn't dangerous because scheduling
1160 		 * mvm->add_stream_wk can't ruin the state, and if we DON'T
1161 		 * schedule it due to some race condition then next TX we get
1162 		 * here we will.
1163 		 */
1164 		if (unlikely(mvm->queue_info[txq_id].status ==
1165 			     IWL_MVM_QUEUE_SHARED &&
1166 			     iwl_mvm_txq_should_update(mvm, txq_id)))
1167 			schedule_work(&mvm->add_stream_wk);
1168 	}
1169 
1170 	IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x len %d\n",
1171 		     mvmsta->sta_id, tid, txq_id,
1172 		     IEEE80211_SEQ_TO_SN(seq_number), skb->len);
1173 
1174 	/* From now on, we cannot access info->control */
1175 	iwl_mvm_skb_prepare_status(skb, dev_cmd);
1176 
1177 	/*
1178 	 * The IV is introduced by the HW for new tx api, and it is not present
1179 	 * in the skb, hence, don't tell iwl_mvm_mei_tx_copy_to_csme about the
1180 	 * IV for those devices.
1181 	 */
1182 	if (ieee80211_is_data(fc))
1183 		iwl_mvm_mei_tx_copy_to_csme(mvm, skb,
1184 					    info->control.hw_key &&
1185 					    !iwl_mvm_has_new_tx_api(mvm) ?
1186 					    info->control.hw_key->iv_len : 0);
1187 
1188 	if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
1189 		goto drop_unlock_sta;
1190 
1191 	if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
1192 		mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
1193 
1194 	spin_unlock(&mvmsta->lock);
1195 
1196 	if (iwl_mvm_tx_pkt_queued(mvm, mvmsta,
1197 				  tid == IWL_MAX_TID_COUNT ? 0 : tid))
1198 		goto drop;
1199 
1200 	return 0;
1201 
1202 drop_unlock_sta:
1203 	iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
1204 	spin_unlock(&mvmsta->lock);
1205 drop:
1206 	IWL_DEBUG_TX(mvm, "TX to [%d|%d] dropped\n", mvmsta->sta_id, tid);
1207 	return -1;
1208 }
1209 
1210 int iwl_mvm_tx_skb_sta(struct iwl_mvm *mvm, struct sk_buff *skb,
1211 		       struct ieee80211_sta *sta)
1212 {
1213 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1214 	struct ieee80211_tx_info info;
1215 	struct sk_buff_head mpdus_skbs;
1216 	unsigned int payload_len;
1217 	int ret;
1218 	struct sk_buff *orig_skb = skb;
1219 
1220 	if (WARN_ON_ONCE(!mvmsta))
1221 		return -1;
1222 
1223 	if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA))
1224 		return -1;
1225 
1226 	memcpy(&info, skb->cb, sizeof(info));
1227 
1228 	if (!skb_is_gso(skb))
1229 		return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1230 
1231 	payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1232 		tcp_hdrlen(skb) + skb->data_len;
1233 
1234 	if (payload_len <= skb_shinfo(skb)->gso_size)
1235 		return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1236 
1237 	__skb_queue_head_init(&mpdus_skbs);
1238 
1239 	ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
1240 	if (ret)
1241 		return ret;
1242 
1243 	if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1244 		return ret;
1245 
1246 	while (!skb_queue_empty(&mpdus_skbs)) {
1247 		skb = __skb_dequeue(&mpdus_skbs);
1248 
1249 		ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
1250 		if (ret) {
1251 			/* Free skbs created as part of TSO logic that have not yet been dequeued */
1252 			__skb_queue_purge(&mpdus_skbs);
1253 			/* skb here is not necessarily same as skb that entered this method,
1254 			 * so free it explicitly.
1255 			 */
1256 			if (skb == orig_skb)
1257 				ieee80211_free_txskb(mvm->hw, skb);
1258 			else
1259 				kfree_skb(skb);
1260 			/* there was error, but we consumed skb one way or another, so return 0 */
1261 			return 0;
1262 		}
1263 	}
1264 
1265 	return 0;
1266 }
1267 
1268 static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1269 				      struct ieee80211_sta *sta, u8 tid)
1270 {
1271 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1272 	struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1273 	struct ieee80211_vif *vif = mvmsta->vif;
1274 	u16 normalized_ssn;
1275 
1276 	lockdep_assert_held(&mvmsta->lock);
1277 
1278 	if ((tid_data->state == IWL_AGG_ON ||
1279 	     tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1280 	    iwl_mvm_tid_queued(mvm, tid_data) == 0) {
1281 		/*
1282 		 * Now that this aggregation or DQA queue is empty tell
1283 		 * mac80211 so it knows we no longer have frames buffered for
1284 		 * the station on this TID (for the TIM bitmap calculation.)
1285 		 */
1286 		ieee80211_sta_set_buffered(sta, tid, false);
1287 	}
1288 
1289 	/*
1290 	 * In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
1291 	 * to align the wrap around of ssn so we compare relevant values.
1292 	 */
1293 	normalized_ssn = tid_data->ssn;
1294 	if (mvm->trans->trans_cfg->gen2)
1295 		normalized_ssn &= 0xff;
1296 
1297 	if (normalized_ssn != tid_data->next_reclaimed)
1298 		return;
1299 
1300 	switch (tid_data->state) {
1301 	case IWL_EMPTYING_HW_QUEUE_ADDBA:
1302 		IWL_DEBUG_TX_QUEUES(mvm,
1303 				    "Can continue addBA flow ssn = next_recl = %d\n",
1304 				    tid_data->next_reclaimed);
1305 		tid_data->state = IWL_AGG_STARTING;
1306 		ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1307 		break;
1308 
1309 	case IWL_EMPTYING_HW_QUEUE_DELBA:
1310 		IWL_DEBUG_TX_QUEUES(mvm,
1311 				    "Can continue DELBA flow ssn = next_recl = %d\n",
1312 				    tid_data->next_reclaimed);
1313 		tid_data->state = IWL_AGG_OFF;
1314 		ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1315 		break;
1316 
1317 	default:
1318 		break;
1319 	}
1320 }
1321 
1322 #ifdef CONFIG_IWLWIFI_DEBUG
1323 const char *iwl_mvm_get_tx_fail_reason(u32 status)
1324 {
1325 #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1326 #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1327 
1328 	switch (status & TX_STATUS_MSK) {
1329 	case TX_STATUS_SUCCESS:
1330 		return "SUCCESS";
1331 	TX_STATUS_POSTPONE(DELAY);
1332 	TX_STATUS_POSTPONE(FEW_BYTES);
1333 	TX_STATUS_POSTPONE(BT_PRIO);
1334 	TX_STATUS_POSTPONE(QUIET_PERIOD);
1335 	TX_STATUS_POSTPONE(CALC_TTAK);
1336 	TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1337 	TX_STATUS_FAIL(SHORT_LIMIT);
1338 	TX_STATUS_FAIL(LONG_LIMIT);
1339 	TX_STATUS_FAIL(UNDERRUN);
1340 	TX_STATUS_FAIL(DRAIN_FLOW);
1341 	TX_STATUS_FAIL(RFKILL_FLUSH);
1342 	TX_STATUS_FAIL(LIFE_EXPIRE);
1343 	TX_STATUS_FAIL(DEST_PS);
1344 	TX_STATUS_FAIL(HOST_ABORTED);
1345 	TX_STATUS_FAIL(BT_RETRY);
1346 	TX_STATUS_FAIL(STA_INVALID);
1347 	TX_STATUS_FAIL(FRAG_DROPPED);
1348 	TX_STATUS_FAIL(TID_DISABLE);
1349 	TX_STATUS_FAIL(FIFO_FLUSHED);
1350 	TX_STATUS_FAIL(SMALL_CF_POLL);
1351 	TX_STATUS_FAIL(FW_DROP);
1352 	TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1353 	}
1354 
1355 	return "UNKNOWN";
1356 
1357 #undef TX_STATUS_FAIL
1358 #undef TX_STATUS_POSTPONE
1359 }
1360 #endif /* CONFIG_IWLWIFI_DEBUG */
1361 
1362 static int iwl_mvm_get_hwrate_chan_width(u32 chan_width)
1363 {
1364 	switch (chan_width) {
1365 	case RATE_MCS_CHAN_WIDTH_20:
1366 		return 0;
1367 	case RATE_MCS_CHAN_WIDTH_40:
1368 		return IEEE80211_TX_RC_40_MHZ_WIDTH;
1369 	case RATE_MCS_CHAN_WIDTH_80:
1370 		return IEEE80211_TX_RC_80_MHZ_WIDTH;
1371 	case RATE_MCS_CHAN_WIDTH_160:
1372 		return IEEE80211_TX_RC_160_MHZ_WIDTH;
1373 	default:
1374 		return 0;
1375 	}
1376 }
1377 
1378 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
1379 			       enum nl80211_band band,
1380 			       struct ieee80211_tx_rate *r)
1381 {
1382 	u32 format = rate_n_flags & RATE_MCS_MOD_TYPE_MSK;
1383 	u32 rate = format == RATE_MCS_HT_MSK ?
1384 		RATE_HT_MCS_INDEX(rate_n_flags) :
1385 		rate_n_flags & RATE_MCS_CODE_MSK;
1386 
1387 	r->flags |=
1388 		iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1389 					      RATE_MCS_CHAN_WIDTH_MSK);
1390 
1391 	if (rate_n_flags & RATE_MCS_SGI_MSK)
1392 		r->flags |= IEEE80211_TX_RC_SHORT_GI;
1393 	if (format ==  RATE_MCS_HT_MSK) {
1394 		r->flags |= IEEE80211_TX_RC_MCS;
1395 		r->idx = rate;
1396 	} else if (format ==  RATE_MCS_VHT_MSK) {
1397 		ieee80211_rate_set_vht(r, rate,
1398 				       ((rate_n_flags & RATE_MCS_NSS_MSK) >>
1399 					RATE_MCS_NSS_POS) + 1);
1400 		r->flags |= IEEE80211_TX_RC_VHT_MCS;
1401 	} else if (format == RATE_MCS_HE_MSK) {
1402 		/* mac80211 cannot do this without ieee80211_tx_status_ext()
1403 		 * but it only matters for radiotap */
1404 		r->idx = 0;
1405 	} else {
1406 		r->idx = iwl_mvm_legacy_hw_idx_to_mac80211_idx(rate_n_flags,
1407 							       band);
1408 	}
1409 }
1410 
1411 void iwl_mvm_hwrate_to_tx_rate_v1(u32 rate_n_flags,
1412 				  enum nl80211_band band,
1413 				  struct ieee80211_tx_rate *r)
1414 {
1415 	if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1416 		r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1417 
1418 	r->flags |=
1419 		iwl_mvm_get_hwrate_chan_width(rate_n_flags &
1420 					      RATE_MCS_CHAN_WIDTH_MSK_V1);
1421 
1422 	if (rate_n_flags & RATE_MCS_SGI_MSK_V1)
1423 		r->flags |= IEEE80211_TX_RC_SHORT_GI;
1424 	if (rate_n_flags & RATE_MCS_HT_MSK_V1) {
1425 		r->flags |= IEEE80211_TX_RC_MCS;
1426 		r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK_V1;
1427 	} else if (rate_n_flags & RATE_MCS_VHT_MSK_V1) {
1428 		ieee80211_rate_set_vht(
1429 			r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1430 			((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1431 						RATE_VHT_MCS_NSS_POS) + 1);
1432 		r->flags |= IEEE80211_TX_RC_VHT_MCS;
1433 	} else {
1434 		r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
1435 							     band);
1436 	}
1437 }
1438 
1439 /*
1440  * translate ucode response to mac80211 tx status control values
1441  */
1442 static void iwl_mvm_hwrate_to_tx_status(const struct iwl_fw *fw,
1443 					u32 rate_n_flags,
1444 					struct ieee80211_tx_info *info)
1445 {
1446 	struct ieee80211_tx_rate *r = &info->status.rates[0];
1447 
1448 	if (iwl_fw_lookup_notif_ver(fw, LONG_GROUP,
1449 				    TX_CMD, 0) <= 6)
1450 		rate_n_flags = iwl_new_rate_from_v1(rate_n_flags);
1451 
1452 	info->status.antenna =
1453 		((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS);
1454 	iwl_mvm_hwrate_to_tx_rate(rate_n_flags,
1455 				  info->band, r);
1456 }
1457 
1458 static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1459 					    u32 status, __le16 frame_control)
1460 {
1461 	struct iwl_fw_dbg_trigger_tlv *trig;
1462 	struct iwl_fw_dbg_trigger_tx_status *status_trig;
1463 	int i;
1464 
1465 	if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS) {
1466 		enum iwl_fw_ini_time_point tp =
1467 			IWL_FW_INI_TIME_POINT_TX_FAILED;
1468 
1469 		if (ieee80211_is_action(frame_control))
1470 			tp = IWL_FW_INI_TIME_POINT_TX_WFD_ACTION_FRAME_FAILED;
1471 
1472 		iwl_dbg_tlv_time_point(&mvm->fwrt,
1473 				       tp, NULL);
1474 		return;
1475 	}
1476 
1477 	trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL,
1478 				     FW_DBG_TRIGGER_TX_STATUS);
1479 	if (!trig)
1480 		return;
1481 
1482 	status_trig = (void *)trig->data;
1483 
1484 	for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1485 		/* don't collect on status 0 */
1486 		if (!status_trig->statuses[i].status)
1487 			break;
1488 
1489 		if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1490 			continue;
1491 
1492 		iwl_fw_dbg_collect_trig(&mvm->fwrt, trig,
1493 					"Tx status %d was received",
1494 					status & TX_STATUS_MSK);
1495 		break;
1496 	}
1497 }
1498 
1499 /*
1500  * iwl_mvm_get_scd_ssn - returns the SSN of the SCD
1501  * @tx_resp: the Tx response from the fw (agg or non-agg)
1502  *
1503  * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
1504  * it can't know that everything will go well until the end of the AMPDU, it
1505  * can't know in advance the number of MPDUs that will be sent in the current
1506  * batch. This is why it writes the agg Tx response while it fetches the MPDUs.
1507  * Hence, it can't know in advance what the SSN of the SCD will be at the end
1508  * of the batch. This is why the SSN of the SCD is written at the end of the
1509  * whole struct at a variable offset. This function knows how to cope with the
1510  * variable offset and returns the SSN of the SCD.
1511  */
1512 static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm,
1513 				      struct iwl_mvm_tx_resp *tx_resp)
1514 {
1515 	return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) +
1516 			    tx_resp->frame_count) & 0xfff;
1517 }
1518 
1519 static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1520 				     struct iwl_rx_packet *pkt)
1521 {
1522 	struct ieee80211_sta *sta;
1523 	u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1524 	int txq_id = SEQ_TO_QUEUE(sequence);
1525 	/* struct iwl_mvm_tx_resp_v3 is almost the same */
1526 	struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1527 	int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1528 	int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1529 	struct agg_tx_status *agg_status =
1530 		iwl_mvm_get_agg_status(mvm, tx_resp);
1531 	u32 status = le16_to_cpu(agg_status->status);
1532 	u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
1533 	struct sk_buff_head skbs;
1534 	u8 skb_freed = 0;
1535 	u8 lq_color;
1536 	u16 next_reclaimed, seq_ctl;
1537 	bool is_ndp = false;
1538 
1539 	__skb_queue_head_init(&skbs);
1540 
1541 	if (iwl_mvm_has_new_tx_api(mvm))
1542 		txq_id = le16_to_cpu(tx_resp->tx_queue);
1543 
1544 	seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1545 
1546 	/* we can free until ssn % q.n_bd not inclusive */
1547 	iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1548 
1549 	while (!skb_queue_empty(&skbs)) {
1550 		struct sk_buff *skb = __skb_dequeue(&skbs);
1551 		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1552 		struct ieee80211_hdr *hdr = (void *)skb->data;
1553 		bool flushed = false;
1554 
1555 		skb_freed++;
1556 
1557 		iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1558 
1559 		memset(&info->status, 0, sizeof(info->status));
1560 
1561 		/* inform mac80211 about what happened with the frame */
1562 		switch (status & TX_STATUS_MSK) {
1563 		case TX_STATUS_SUCCESS:
1564 		case TX_STATUS_DIRECT_DONE:
1565 			info->flags |= IEEE80211_TX_STAT_ACK;
1566 			break;
1567 		case TX_STATUS_FAIL_FIFO_FLUSHED:
1568 		case TX_STATUS_FAIL_DRAIN_FLOW:
1569 			flushed = true;
1570 			break;
1571 		case TX_STATUS_FAIL_DEST_PS:
1572 			/* the FW should have stopped the queue and not
1573 			 * return this status
1574 			 */
1575 			IWL_ERR_LIMIT(mvm,
1576 				      "FW reported TX filtered, status=0x%x, FC=0x%x\n",
1577 				      status, le16_to_cpu(hdr->frame_control));
1578 			info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1579 			break;
1580 		default:
1581 			break;
1582 		}
1583 
1584 		if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1585 		    ieee80211_is_mgmt(hdr->frame_control))
1586 			iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
1587 
1588 		/*
1589 		 * If we are freeing multiple frames, mark all the frames
1590 		 * but the first one as acked, since they were acknowledged
1591 		 * before
1592 		 * */
1593 		if (skb_freed > 1)
1594 			info->flags |= IEEE80211_TX_STAT_ACK;
1595 
1596 		iwl_mvm_tx_status_check_trigger(mvm, status, hdr->frame_control);
1597 
1598 		info->status.rates[0].count = tx_resp->failure_frame + 1;
1599 
1600 		iwl_mvm_hwrate_to_tx_status(mvm->fw,
1601 					    le32_to_cpu(tx_resp->initial_rate),
1602 					    info);
1603 
1604 		/* Don't assign the converted initial_rate, because driver
1605 		 * TLC uses this and doesn't support the new FW rate
1606 		 */
1607 		info->status.status_driver_data[1] =
1608 			(void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
1609 
1610 		/* Single frame failure in an AMPDU queue => send BAR */
1611 		if (info->flags & IEEE80211_TX_CTL_AMPDU &&
1612 		    !(info->flags & IEEE80211_TX_STAT_ACK) &&
1613 		    !(info->flags & IEEE80211_TX_STAT_TX_FILTERED) && !flushed)
1614 			info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1615 		info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1616 
1617 		/* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
1618 		if (ieee80211_is_back_req(hdr->frame_control))
1619 			seq_ctl = 0;
1620 		else if (status != TX_STATUS_SUCCESS)
1621 			seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1622 
1623 		if (unlikely(!seq_ctl)) {
1624 			/*
1625 			 * If it is an NDP, we can't update next_reclaim since
1626 			 * its sequence control is 0. Note that for that same
1627 			 * reason, NDPs are never sent to A-MPDU'able queues
1628 			 * so that we can never have more than one freed frame
1629 			 * for a single Tx resonse (see WARN_ON below).
1630 			 */
1631 			if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1632 				is_ndp = true;
1633 		}
1634 
1635 		/*
1636 		 * TODO: this is not accurate if we are freeing more than one
1637 		 * packet.
1638 		 */
1639 		info->status.tx_time =
1640 			le16_to_cpu(tx_resp->wireless_media_time);
1641 		BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1642 		lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1643 		info->status.status_driver_data[0] =
1644 			RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
1645 
1646 		ieee80211_tx_status(mvm->hw, skb);
1647 	}
1648 
1649 	/* This is an aggregation queue or might become one, so we use
1650 	 * the ssn since: ssn = wifi seq_num % 256.
1651 	 * The seq_ctl is the sequence control of the packet to which
1652 	 * this Tx response relates. But if there is a hole in the
1653 	 * bitmap of the BA we received, this Tx response may allow to
1654 	 * reclaim the hole and all the subsequent packets that were
1655 	 * already acked. In that case, seq_ctl != ssn, and the next
1656 	 * packet to be reclaimed will be ssn and not seq_ctl. In that
1657 	 * case, several packets will be reclaimed even if
1658 	 * frame_count = 1.
1659 	 *
1660 	 * The ssn is the index (% 256) of the latest packet that has
1661 	 * treated (acked / dropped) + 1.
1662 	 */
1663 	next_reclaimed = ssn;
1664 
1665 	IWL_DEBUG_TX_REPLY(mvm,
1666 			   "TXQ %d status %s (0x%08x)\n",
1667 			   txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1668 
1669 	IWL_DEBUG_TX_REPLY(mvm,
1670 			   "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1671 			   le32_to_cpu(tx_resp->initial_rate),
1672 			   tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1673 			   ssn, next_reclaimed, seq_ctl);
1674 
1675 	rcu_read_lock();
1676 
1677 	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1678 	/*
1679 	 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1680 	 * the firmware while we still have packets for it in the Tx queues.
1681 	 */
1682 	if (WARN_ON_ONCE(!sta))
1683 		goto out;
1684 
1685 	if (!IS_ERR(sta)) {
1686 		struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1687 
1688 		iwl_mvm_tx_airtime(mvm, mvmsta,
1689 				   le16_to_cpu(tx_resp->wireless_media_time));
1690 
1691 		if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
1692 		    mvmsta->sta_state < IEEE80211_STA_AUTHORIZED)
1693 			iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
1694 
1695 		if (sta->wme && tid != IWL_MGMT_TID) {
1696 			struct iwl_mvm_tid_data *tid_data =
1697 				&mvmsta->tid_data[tid];
1698 			bool send_eosp_ndp = false;
1699 
1700 			spin_lock_bh(&mvmsta->lock);
1701 
1702 			if (!is_ndp) {
1703 				tid_data->next_reclaimed = next_reclaimed;
1704 				IWL_DEBUG_TX_REPLY(mvm,
1705 						   "Next reclaimed packet:%d\n",
1706 						   next_reclaimed);
1707 			} else {
1708 				IWL_DEBUG_TX_REPLY(mvm,
1709 						   "NDP - don't update next_reclaimed\n");
1710 			}
1711 
1712 			iwl_mvm_check_ratid_empty(mvm, sta, tid);
1713 
1714 			if (mvmsta->sleep_tx_count) {
1715 				mvmsta->sleep_tx_count--;
1716 				if (mvmsta->sleep_tx_count &&
1717 				    !iwl_mvm_tid_queued(mvm, tid_data)) {
1718 					/*
1719 					 * The number of frames in the queue
1720 					 * dropped to 0 even if we sent less
1721 					 * frames than we thought we had on the
1722 					 * Tx queue.
1723 					 * This means we had holes in the BA
1724 					 * window that we just filled, ask
1725 					 * mac80211 to send EOSP since the
1726 					 * firmware won't know how to do that.
1727 					 * Send NDP and the firmware will send
1728 					 * EOSP notification that will trigger
1729 					 * a call to ieee80211_sta_eosp().
1730 					 */
1731 					send_eosp_ndp = true;
1732 				}
1733 			}
1734 
1735 			spin_unlock_bh(&mvmsta->lock);
1736 			if (send_eosp_ndp) {
1737 				iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1738 					IEEE80211_FRAME_RELEASE_UAPSD,
1739 					1, tid, false, false);
1740 				mvmsta->sleep_tx_count = 0;
1741 				ieee80211_send_eosp_nullfunc(sta, tid);
1742 			}
1743 		}
1744 
1745 		if (mvmsta->next_status_eosp) {
1746 			mvmsta->next_status_eosp = false;
1747 			ieee80211_sta_eosp(sta);
1748 		}
1749 	}
1750 out:
1751 	rcu_read_unlock();
1752 }
1753 
1754 #ifdef CONFIG_IWLWIFI_DEBUG
1755 #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1756 static const char *iwl_get_agg_tx_status(u16 status)
1757 {
1758 	switch (status & AGG_TX_STATE_STATUS_MSK) {
1759 	AGG_TX_STATE_(TRANSMITTED);
1760 	AGG_TX_STATE_(UNDERRUN);
1761 	AGG_TX_STATE_(BT_PRIO);
1762 	AGG_TX_STATE_(FEW_BYTES);
1763 	AGG_TX_STATE_(ABORT);
1764 	AGG_TX_STATE_(TX_ON_AIR_DROP);
1765 	AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1766 	AGG_TX_STATE_(LAST_SENT_BT_KILL);
1767 	AGG_TX_STATE_(SCD_QUERY);
1768 	AGG_TX_STATE_(TEST_BAD_CRC32);
1769 	AGG_TX_STATE_(RESPONSE);
1770 	AGG_TX_STATE_(DUMP_TX);
1771 	AGG_TX_STATE_(DELAY_TX);
1772 	}
1773 
1774 	return "UNKNOWN";
1775 }
1776 
1777 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1778 				      struct iwl_rx_packet *pkt)
1779 {
1780 	struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1781 	struct agg_tx_status *frame_status =
1782 		iwl_mvm_get_agg_status(mvm, tx_resp);
1783 	int i;
1784 	bool tirgger_timepoint = false;
1785 
1786 	for (i = 0; i < tx_resp->frame_count; i++) {
1787 		u16 fstatus = le16_to_cpu(frame_status[i].status);
1788 		/* In case one frame wasn't transmitted trigger time point */
1789 		tirgger_timepoint |= ((fstatus & AGG_TX_STATE_STATUS_MSK) !=
1790 				      AGG_TX_STATE_TRANSMITTED);
1791 		IWL_DEBUG_TX_REPLY(mvm,
1792 				   "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1793 				   iwl_get_agg_tx_status(fstatus),
1794 				   fstatus & AGG_TX_STATE_STATUS_MSK,
1795 				   (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1796 					AGG_TX_STATE_TRY_CNT_POS,
1797 				   le16_to_cpu(frame_status[i].sequence));
1798 	}
1799 
1800 	if (tirgger_timepoint)
1801 		iwl_dbg_tlv_time_point(&mvm->fwrt,
1802 				       IWL_FW_INI_TIME_POINT_TX_FAILED, NULL);
1803 
1804 }
1805 #else
1806 static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1807 				      struct iwl_rx_packet *pkt)
1808 {}
1809 #endif /* CONFIG_IWLWIFI_DEBUG */
1810 
1811 static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1812 				  struct iwl_rx_packet *pkt)
1813 {
1814 	struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1815 	int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1816 	int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1817 	u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1818 	struct iwl_mvm_sta *mvmsta;
1819 	int queue = SEQ_TO_QUEUE(sequence);
1820 	struct ieee80211_sta *sta;
1821 
1822 	if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
1823 			 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))
1824 		return;
1825 
1826 	iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1827 
1828 	rcu_read_lock();
1829 
1830 	mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
1831 
1832 	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1833 	if (WARN_ON_ONCE(!sta || !sta->wme)) {
1834 		rcu_read_unlock();
1835 		return;
1836 	}
1837 
1838 	if (!WARN_ON_ONCE(!mvmsta)) {
1839 		mvmsta->tid_data[tid].rate_n_flags =
1840 			le32_to_cpu(tx_resp->initial_rate);
1841 		mvmsta->tid_data[tid].tx_time =
1842 			le16_to_cpu(tx_resp->wireless_media_time);
1843 		mvmsta->tid_data[tid].lq_color =
1844 			TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
1845 		iwl_mvm_tx_airtime(mvm, mvmsta,
1846 				   le16_to_cpu(tx_resp->wireless_media_time));
1847 	}
1848 
1849 	rcu_read_unlock();
1850 }
1851 
1852 void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
1853 {
1854 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
1855 	struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1856 
1857 	if (tx_resp->frame_count == 1)
1858 		iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1859 	else
1860 		iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
1861 }
1862 
1863 static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid,
1864 			       int txq, int index,
1865 			       struct ieee80211_tx_info *tx_info, u32 rate,
1866 			       bool is_flush)
1867 {
1868 	struct sk_buff_head reclaimed_skbs;
1869 	struct iwl_mvm_tid_data *tid_data = NULL;
1870 	struct ieee80211_sta *sta;
1871 	struct iwl_mvm_sta *mvmsta = NULL;
1872 	struct sk_buff *skb;
1873 	int freed;
1874 
1875 	if (WARN_ONCE(sta_id >= mvm->fw->ucode_capa.num_stations ||
1876 		      tid > IWL_MAX_TID_COUNT,
1877 		      "sta_id %d tid %d", sta_id, tid))
1878 		return;
1879 
1880 	rcu_read_lock();
1881 
1882 	sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1883 
1884 	/* Reclaiming frames for a station that has been deleted ? */
1885 	if (WARN_ON_ONCE(!sta)) {
1886 		rcu_read_unlock();
1887 		return;
1888 	}
1889 
1890 	__skb_queue_head_init(&reclaimed_skbs);
1891 
1892 	/*
1893 	 * Release all TFDs before the SSN, i.e. all TFDs in front of
1894 	 * block-ack window (we assume that they've been successfully
1895 	 * transmitted ... if not, it's too late anyway).
1896 	 */
1897 	iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
1898 
1899 	skb_queue_walk(&reclaimed_skbs, skb) {
1900 		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1901 
1902 		iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1903 
1904 		memset(&info->status, 0, sizeof(info->status));
1905 		/* Packet was transmitted successfully, failures come as single
1906 		 * frames because before failing a frame the firmware transmits
1907 		 * it without aggregation at least once.
1908 		 */
1909 		if (!is_flush)
1910 			info->flags |= IEEE80211_TX_STAT_ACK;
1911 	}
1912 
1913 	/*
1914 	 * It's possible to get a BA response after invalidating the rcu (rcu is
1915 	 * invalidated in order to prevent new Tx from being sent, but there may
1916 	 * be some frames already in-flight).
1917 	 * In this case we just want to reclaim, and could skip all the
1918 	 * sta-dependent stuff since it's in the middle of being removed
1919 	 * anyways.
1920 	 */
1921 	if (IS_ERR(sta))
1922 		goto out;
1923 
1924 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
1925 	tid_data = &mvmsta->tid_data[tid];
1926 
1927 	if (tid_data->txq_id != txq) {
1928 		IWL_ERR(mvm,
1929 			"invalid reclaim request: Q %d, tid %d\n",
1930 			tid_data->txq_id, tid);
1931 		rcu_read_unlock();
1932 		return;
1933 	}
1934 
1935 	spin_lock_bh(&mvmsta->lock);
1936 
1937 	tid_data->next_reclaimed = index;
1938 
1939 	iwl_mvm_check_ratid_empty(mvm, sta, tid);
1940 
1941 	freed = 0;
1942 
1943 	/* pack lq color from tid_data along the reduced txp */
1944 	tx_info->status.status_driver_data[0] =
1945 		RS_DRV_DATA_PACK(tid_data->lq_color,
1946 				 tx_info->status.status_driver_data[0]);
1947 	tx_info->status.status_driver_data[1] = (void *)(uintptr_t)rate;
1948 
1949 	skb_queue_walk(&reclaimed_skbs, skb) {
1950 		struct ieee80211_hdr *hdr = (void *)skb->data;
1951 		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1952 
1953 		if (!is_flush) {
1954 			if (ieee80211_is_data_qos(hdr->frame_control))
1955 				freed++;
1956 			else
1957 				WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
1958 		}
1959 
1960 		/* this is the first skb we deliver in this batch */
1961 		/* put the rate scaling data there */
1962 		if (freed == 1) {
1963 			info->flags |= IEEE80211_TX_STAT_AMPDU;
1964 			memcpy(&info->status, &tx_info->status,
1965 			       sizeof(tx_info->status));
1966 			iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, info);
1967 		}
1968 	}
1969 
1970 	spin_unlock_bh(&mvmsta->lock);
1971 
1972 	/* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1973 	 * possible (i.e. first MPDU in the aggregation wasn't acked)
1974 	 * Still it's important to update RS about sent vs. acked.
1975 	 */
1976 	if (!is_flush && skb_queue_empty(&reclaimed_skbs)) {
1977 		struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1978 
1979 		if (mvmsta->vif)
1980 			chanctx_conf =
1981 				rcu_dereference(mvmsta->vif->bss_conf.chanctx_conf);
1982 
1983 		if (WARN_ON_ONCE(!chanctx_conf))
1984 			goto out;
1985 
1986 		tx_info->band = chanctx_conf->def.chan->band;
1987 		iwl_mvm_hwrate_to_tx_status(mvm->fw, rate, tx_info);
1988 
1989 		if (!iwl_mvm_has_tlc_offload(mvm)) {
1990 			IWL_DEBUG_TX_REPLY(mvm,
1991 					   "No reclaim. Update rs directly\n");
1992 			iwl_mvm_rs_tx_status(mvm, sta, tid, tx_info, false);
1993 		}
1994 	}
1995 
1996 out:
1997 	rcu_read_unlock();
1998 
1999 	while (!skb_queue_empty(&reclaimed_skbs)) {
2000 		skb = __skb_dequeue(&reclaimed_skbs);
2001 		ieee80211_tx_status(mvm->hw, skb);
2002 	}
2003 }
2004 
2005 void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
2006 {
2007 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
2008 	unsigned int pkt_len = iwl_rx_packet_payload_len(pkt);
2009 	int sta_id, tid, txq, index;
2010 	struct ieee80211_tx_info ba_info = {};
2011 	struct iwl_mvm_ba_notif *ba_notif;
2012 	struct iwl_mvm_tid_data *tid_data;
2013 	struct iwl_mvm_sta *mvmsta;
2014 
2015 	ba_info.flags = IEEE80211_TX_STAT_AMPDU;
2016 
2017 	if (iwl_mvm_has_new_tx_api(mvm)) {
2018 		struct iwl_mvm_compressed_ba_notif *ba_res =
2019 			(void *)pkt->data;
2020 		u8 lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
2021 		u16 tfd_cnt;
2022 		int i;
2023 
2024 		if (unlikely(sizeof(*ba_res) > pkt_len))
2025 			return;
2026 
2027 		sta_id = ba_res->sta_id;
2028 		ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done);
2029 		ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed);
2030 		ba_info.status.tx_time =
2031 			(u16)le32_to_cpu(ba_res->wireless_time);
2032 		ba_info.status.status_driver_data[0] =
2033 			(void *)(uintptr_t)ba_res->reduced_txp;
2034 
2035 		tfd_cnt = le16_to_cpu(ba_res->tfd_cnt);
2036 		if (!tfd_cnt || struct_size(ba_res, tfd, tfd_cnt) > pkt_len)
2037 			return;
2038 
2039 		rcu_read_lock();
2040 
2041 		mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2042 		/*
2043 		 * It's possible to get a BA response after invalidating the rcu
2044 		 * (rcu is invalidated in order to prevent new Tx from being
2045 		 * sent, but there may be some frames already in-flight).
2046 		 * In this case we just want to reclaim, and could skip all the
2047 		 * sta-dependent stuff since it's in the middle of being removed
2048 		 * anyways.
2049 		 */
2050 
2051 		/* Free per TID */
2052 		for (i = 0; i < tfd_cnt; i++) {
2053 			struct iwl_mvm_compressed_ba_tfd *ba_tfd =
2054 				&ba_res->tfd[i];
2055 
2056 			tid = ba_tfd->tid;
2057 			if (tid == IWL_MGMT_TID)
2058 				tid = IWL_MAX_TID_COUNT;
2059 
2060 			if (mvmsta)
2061 				mvmsta->tid_data[i].lq_color = lq_color;
2062 
2063 			iwl_mvm_tx_reclaim(mvm, sta_id, tid,
2064 					   (int)(le16_to_cpu(ba_tfd->q_num)),
2065 					   le16_to_cpu(ba_tfd->tfd_index),
2066 					   &ba_info,
2067 					   le32_to_cpu(ba_res->tx_rate), false);
2068 		}
2069 
2070 		if (mvmsta)
2071 			iwl_mvm_tx_airtime(mvm, mvmsta,
2072 					   le32_to_cpu(ba_res->wireless_time));
2073 		rcu_read_unlock();
2074 
2075 		IWL_DEBUG_TX_REPLY(mvm,
2076 				   "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n",
2077 				   sta_id, le32_to_cpu(ba_res->flags),
2078 				   le16_to_cpu(ba_res->txed),
2079 				   le16_to_cpu(ba_res->done));
2080 		return;
2081 	}
2082 
2083 	ba_notif = (void *)pkt->data;
2084 	sta_id = ba_notif->sta_id;
2085 	tid = ba_notif->tid;
2086 	/* "flow" corresponds to Tx queue */
2087 	txq = le16_to_cpu(ba_notif->scd_flow);
2088 	/* "ssn" is start of block-ack Tx window, corresponds to index
2089 	 * (in Tx queue's circular buffer) of first TFD/frame in window */
2090 	index = le16_to_cpu(ba_notif->scd_ssn);
2091 
2092 	rcu_read_lock();
2093 	mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
2094 	if (WARN_ON_ONCE(!mvmsta)) {
2095 		rcu_read_unlock();
2096 		return;
2097 	}
2098 
2099 	tid_data = &mvmsta->tid_data[tid];
2100 
2101 	ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
2102 	ba_info.status.ampdu_len = ba_notif->txed;
2103 	ba_info.status.tx_time = tid_data->tx_time;
2104 	ba_info.status.status_driver_data[0] =
2105 		(void *)(uintptr_t)ba_notif->reduced_txp;
2106 
2107 	rcu_read_unlock();
2108 
2109 	iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info,
2110 			   tid_data->rate_n_flags, false);
2111 
2112 	IWL_DEBUG_TX_REPLY(mvm,
2113 			   "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
2114 			   ba_notif->sta_addr, ba_notif->sta_id);
2115 
2116 	IWL_DEBUG_TX_REPLY(mvm,
2117 			   "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
2118 			   ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
2119 			   le64_to_cpu(ba_notif->bitmap), txq, index,
2120 			   ba_notif->txed, ba_notif->txed_2_done);
2121 
2122 	IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
2123 			   ba_notif->reduced_txp);
2124 }
2125 
2126 /*
2127  * Note that there are transports that buffer frames before they reach
2128  * the firmware. This means that after flush_tx_path is called, the
2129  * queue might not be empty. The race-free way to handle this is to:
2130  * 1) set the station as draining
2131  * 2) flush the Tx path
2132  * 3) wait for the transport queues to be empty
2133  */
2134 int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk)
2135 {
2136 	int ret;
2137 	struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
2138 		.queues_ctl = cpu_to_le32(tfd_msk),
2139 		.flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
2140 	};
2141 
2142 	WARN_ON(iwl_mvm_has_new_tx_api(mvm));
2143 	ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, 0,
2144 				   sizeof(flush_cmd), &flush_cmd);
2145 	if (ret)
2146 		IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2147 	return ret;
2148 }
2149 
2150 int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, u16 tids)
2151 {
2152 	int ret;
2153 	struct iwl_tx_path_flush_cmd_rsp *rsp;
2154 	struct iwl_tx_path_flush_cmd flush_cmd = {
2155 		.sta_id = cpu_to_le32(sta_id),
2156 		.tid_mask = cpu_to_le16(tids),
2157 	};
2158 
2159 	struct iwl_host_cmd cmd = {
2160 		.id = TXPATH_FLUSH,
2161 		.len = { sizeof(flush_cmd), },
2162 		.data = { &flush_cmd, },
2163 	};
2164 
2165 	WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
2166 
2167 	if (iwl_fw_lookup_notif_ver(mvm->fw, LONG_GROUP, TXPATH_FLUSH, 0) > 0)
2168 		cmd.flags |= CMD_WANT_SKB;
2169 
2170 	IWL_DEBUG_TX_QUEUES(mvm, "flush for sta id %d tid mask 0x%x\n",
2171 			    sta_id, tids);
2172 
2173 	ret = iwl_mvm_send_cmd(mvm, &cmd);
2174 
2175 	if (ret) {
2176 		IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
2177 		return ret;
2178 	}
2179 
2180 	if (cmd.flags & CMD_WANT_SKB) {
2181 		int i;
2182 		int num_flushed_queues;
2183 
2184 		if (WARN_ON_ONCE(iwl_rx_packet_payload_len(cmd.resp_pkt) != sizeof(*rsp))) {
2185 			ret = -EIO;
2186 			goto free_rsp;
2187 		}
2188 
2189 		rsp = (void *)cmd.resp_pkt->data;
2190 
2191 		if (WARN_ONCE(le16_to_cpu(rsp->sta_id) != sta_id,
2192 			      "sta_id %d != rsp_sta_id %d",
2193 			      sta_id, le16_to_cpu(rsp->sta_id))) {
2194 			ret = -EIO;
2195 			goto free_rsp;
2196 		}
2197 
2198 		num_flushed_queues = le16_to_cpu(rsp->num_flushed_queues);
2199 		if (WARN_ONCE(num_flushed_queues > IWL_TX_FLUSH_QUEUE_RSP,
2200 			      "num_flushed_queues %d", num_flushed_queues)) {
2201 			ret = -EIO;
2202 			goto free_rsp;
2203 		}
2204 
2205 		for (i = 0; i < num_flushed_queues; i++) {
2206 			struct ieee80211_tx_info tx_info = {};
2207 			struct iwl_flush_queue_info *queue_info = &rsp->queues[i];
2208 			int tid = le16_to_cpu(queue_info->tid);
2209 			int read_before = le16_to_cpu(queue_info->read_before_flush);
2210 			int read_after = le16_to_cpu(queue_info->read_after_flush);
2211 			int queue_num = le16_to_cpu(queue_info->queue_num);
2212 
2213 			if (tid == IWL_MGMT_TID)
2214 				tid = IWL_MAX_TID_COUNT;
2215 
2216 			IWL_DEBUG_TX_QUEUES(mvm,
2217 					    "tid %d queue_id %d read-before %d read-after %d\n",
2218 					    tid, queue_num, read_before, read_after);
2219 
2220 			iwl_mvm_tx_reclaim(mvm, sta_id, tid, queue_num, read_after,
2221 					   &tx_info, 0, true);
2222 		}
2223 free_rsp:
2224 		iwl_free_resp(&cmd);
2225 	}
2226 	return ret;
2227 }
2228 
2229 int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal)
2230 {
2231 	struct iwl_mvm_int_sta *int_sta = sta;
2232 	struct iwl_mvm_sta *mvm_sta = sta;
2233 
2234 	BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) !=
2235 		     offsetof(struct iwl_mvm_sta, sta_id));
2236 
2237 	if (iwl_mvm_has_new_tx_api(mvm))
2238 		return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 0xffff);
2239 
2240 	if (internal)
2241 		return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk);
2242 
2243 	return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk);
2244 }
2245