1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3  * Copyright (C) 2017 Intel Deutschland GmbH
4  * Copyright (C) 2018-2022 Intel Corporation
5  */
6 #include "rs.h"
7 #include "fw-api.h"
8 #include "sta.h"
9 #include "iwl-op-mode.h"
10 #include "mvm.h"
11 
12 static u8 rs_fw_bw_from_sta_bw(struct ieee80211_sta *sta)
13 {
14 	switch (sta->bandwidth) {
15 	case IEEE80211_STA_RX_BW_160:
16 		return IWL_TLC_MNG_CH_WIDTH_160MHZ;
17 	case IEEE80211_STA_RX_BW_80:
18 		return IWL_TLC_MNG_CH_WIDTH_80MHZ;
19 	case IEEE80211_STA_RX_BW_40:
20 		return IWL_TLC_MNG_CH_WIDTH_40MHZ;
21 	case IEEE80211_STA_RX_BW_20:
22 	default:
23 		return IWL_TLC_MNG_CH_WIDTH_20MHZ;
24 	}
25 }
26 
27 static u8 rs_fw_set_active_chains(u8 chains)
28 {
29 	u8 fw_chains = 0;
30 
31 	if (chains & ANT_A)
32 		fw_chains |= IWL_TLC_MNG_CHAIN_A_MSK;
33 	if (chains & ANT_B)
34 		fw_chains |= IWL_TLC_MNG_CHAIN_B_MSK;
35 
36 	return fw_chains;
37 }
38 
39 static u8 rs_fw_sgi_cw_support(struct ieee80211_sta *sta)
40 {
41 	struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
42 	struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
43 	struct ieee80211_sta_he_cap *he_cap = &sta->he_cap;
44 	u8 supp = 0;
45 
46 	if (he_cap->has_he)
47 		return 0;
48 
49 	if (ht_cap->cap & IEEE80211_HT_CAP_SGI_20)
50 		supp |= BIT(IWL_TLC_MNG_CH_WIDTH_20MHZ);
51 	if (ht_cap->cap & IEEE80211_HT_CAP_SGI_40)
52 		supp |= BIT(IWL_TLC_MNG_CH_WIDTH_40MHZ);
53 	if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_80)
54 		supp |= BIT(IWL_TLC_MNG_CH_WIDTH_80MHZ);
55 	if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_160)
56 		supp |= BIT(IWL_TLC_MNG_CH_WIDTH_160MHZ);
57 
58 	return supp;
59 }
60 
61 static u16 rs_fw_get_config_flags(struct iwl_mvm *mvm,
62 				  struct ieee80211_sta *sta,
63 				  struct ieee80211_supported_band *sband)
64 {
65 	struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
66 	struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
67 	struct ieee80211_sta_he_cap *he_cap = &sta->he_cap;
68 	bool vht_ena = vht_cap->vht_supported;
69 	u16 flags = 0;
70 
71 	/* get STBC flags */
72 	if (mvm->cfg->ht_params->stbc &&
73 	    (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1)) {
74 		if (he_cap->has_he && he_cap->he_cap_elem.phy_cap_info[2] &
75 				      IEEE80211_HE_PHY_CAP2_STBC_RX_UNDER_80MHZ)
76 			flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK;
77 		else if (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK)
78 			flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK;
79 		else if (ht_cap->cap & IEEE80211_HT_CAP_RX_STBC)
80 			flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK;
81 	}
82 
83 	if (mvm->cfg->ht_params->ldpc &&
84 	    ((ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING) ||
85 	     (vht_ena && (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC))))
86 		flags |= IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK;
87 
88 	/* consider LDPC support in case of HE */
89 	if (he_cap->has_he && (he_cap->he_cap_elem.phy_cap_info[1] &
90 	    IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD))
91 		flags |= IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK;
92 
93 	if (sband->iftype_data && sband->iftype_data->he_cap.has_he &&
94 	    !(sband->iftype_data->he_cap.he_cap_elem.phy_cap_info[1] &
95 	     IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD))
96 		flags &= ~IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK;
97 
98 	if (he_cap->has_he &&
99 	    (he_cap->he_cap_elem.phy_cap_info[3] &
100 	     IEEE80211_HE_PHY_CAP3_DCM_MAX_CONST_RX_MASK &&
101 	     sband->iftype_data &&
102 	     sband->iftype_data->he_cap.he_cap_elem.phy_cap_info[3] &
103 	     IEEE80211_HE_PHY_CAP3_DCM_MAX_CONST_TX_MASK))
104 		flags |= IWL_TLC_MNG_CFG_FLAGS_HE_DCM_NSS_1_MSK;
105 
106 	return flags;
107 }
108 
109 static
110 int rs_fw_vht_highest_rx_mcs_index(const struct ieee80211_sta_vht_cap *vht_cap,
111 				   int nss)
112 {
113 	u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) &
114 		(0x3 << (2 * (nss - 1)));
115 	rx_mcs >>= (2 * (nss - 1));
116 
117 	switch (rx_mcs) {
118 	case IEEE80211_VHT_MCS_SUPPORT_0_7:
119 		return IWL_TLC_MNG_HT_RATE_MCS7;
120 	case IEEE80211_VHT_MCS_SUPPORT_0_8:
121 		return IWL_TLC_MNG_HT_RATE_MCS8;
122 	case IEEE80211_VHT_MCS_SUPPORT_0_9:
123 		return IWL_TLC_MNG_HT_RATE_MCS9;
124 	default:
125 		WARN_ON_ONCE(1);
126 		break;
127 	}
128 
129 	return 0;
130 }
131 
132 static void
133 rs_fw_vht_set_enabled_rates(const struct ieee80211_sta *sta,
134 			    const struct ieee80211_sta_vht_cap *vht_cap,
135 			    struct iwl_tlc_config_cmd_v4 *cmd)
136 {
137 	u16 supp;
138 	int i, highest_mcs;
139 	u8 max_nss = sta->rx_nss;
140 	struct ieee80211_vht_cap ieee_vht_cap = {
141 		.vht_cap_info = cpu_to_le32(vht_cap->cap),
142 		.supp_mcs = vht_cap->vht_mcs,
143 	};
144 
145 	/* the station support only a single receive chain */
146 	if (sta->smps_mode == IEEE80211_SMPS_STATIC)
147 		max_nss = 1;
148 
149 	for (i = 0; i < max_nss && i < IWL_TLC_NSS_MAX; i++) {
150 		int nss = i + 1;
151 
152 		highest_mcs = rs_fw_vht_highest_rx_mcs_index(vht_cap, nss);
153 		if (!highest_mcs)
154 			continue;
155 
156 		supp = BIT(highest_mcs + 1) - 1;
157 		if (sta->bandwidth == IEEE80211_STA_RX_BW_20)
158 			supp &= ~BIT(IWL_TLC_MNG_HT_RATE_MCS9);
159 
160 		cmd->ht_rates[i][IWL_TLC_MCS_PER_BW_80] = cpu_to_le16(supp);
161 		/*
162 		 * Check if VHT extended NSS indicates that the bandwidth/NSS
163 		 * configuration is supported - only for MCS 0 since we already
164 		 * decoded the MCS bits anyway ourselves.
165 		 */
166 		if (sta->bandwidth == IEEE80211_STA_RX_BW_160 &&
167 		    ieee80211_get_vht_max_nss(&ieee_vht_cap,
168 					      IEEE80211_VHT_CHANWIDTH_160MHZ,
169 					      0, true, nss) >= nss)
170 			cmd->ht_rates[i][IWL_TLC_MCS_PER_BW_160] =
171 				cmd->ht_rates[i][IWL_TLC_MCS_PER_BW_80];
172 	}
173 }
174 
175 static u16 rs_fw_he_ieee80211_mcs_to_rs_mcs(u16 mcs)
176 {
177 	switch (mcs) {
178 	case IEEE80211_HE_MCS_SUPPORT_0_7:
179 		return BIT(IWL_TLC_MNG_HT_RATE_MCS7 + 1) - 1;
180 	case IEEE80211_HE_MCS_SUPPORT_0_9:
181 		return BIT(IWL_TLC_MNG_HT_RATE_MCS9 + 1) - 1;
182 	case IEEE80211_HE_MCS_SUPPORT_0_11:
183 		return BIT(IWL_TLC_MNG_HT_RATE_MCS11 + 1) - 1;
184 	case IEEE80211_HE_MCS_NOT_SUPPORTED:
185 		return 0;
186 	}
187 
188 	WARN(1, "invalid HE MCS %d\n", mcs);
189 	return 0;
190 }
191 
192 static void
193 rs_fw_he_set_enabled_rates(const struct ieee80211_sta *sta,
194 			   struct ieee80211_supported_band *sband,
195 			   struct iwl_tlc_config_cmd_v4 *cmd)
196 {
197 	const struct ieee80211_sta_he_cap *he_cap = &sta->he_cap;
198 	u16 mcs_160 = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160);
199 	u16 mcs_80 = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80);
200 	u16 tx_mcs_80 =
201 		le16_to_cpu(sband->iftype_data->he_cap.he_mcs_nss_supp.tx_mcs_80);
202 	u16 tx_mcs_160 =
203 		le16_to_cpu(sband->iftype_data->he_cap.he_mcs_nss_supp.tx_mcs_160);
204 	int i;
205 	u8 nss = sta->rx_nss;
206 
207 	/* the station support only a single receive chain */
208 	if (sta->smps_mode == IEEE80211_SMPS_STATIC)
209 		nss = 1;
210 
211 	for (i = 0; i < nss && i < IWL_TLC_NSS_MAX; i++) {
212 		u16 _mcs_160 = (mcs_160 >> (2 * i)) & 0x3;
213 		u16 _mcs_80 = (mcs_80 >> (2 * i)) & 0x3;
214 		u16 _tx_mcs_160 = (tx_mcs_160 >> (2 * i)) & 0x3;
215 		u16 _tx_mcs_80 = (tx_mcs_80 >> (2 * i)) & 0x3;
216 
217 		/* If one side doesn't support - mark both as not supporting */
218 		if (_mcs_80 == IEEE80211_HE_MCS_NOT_SUPPORTED ||
219 		    _tx_mcs_80 == IEEE80211_HE_MCS_NOT_SUPPORTED) {
220 			_mcs_80 = IEEE80211_HE_MCS_NOT_SUPPORTED;
221 			_tx_mcs_80 = IEEE80211_HE_MCS_NOT_SUPPORTED;
222 		}
223 		if (_mcs_80 > _tx_mcs_80)
224 			_mcs_80 = _tx_mcs_80;
225 		cmd->ht_rates[i][IWL_TLC_MCS_PER_BW_80] =
226 			cpu_to_le16(rs_fw_he_ieee80211_mcs_to_rs_mcs(_mcs_80));
227 
228 		/* If one side doesn't support - mark both as not supporting */
229 		if (_mcs_160 == IEEE80211_HE_MCS_NOT_SUPPORTED ||
230 		    _tx_mcs_160 == IEEE80211_HE_MCS_NOT_SUPPORTED) {
231 			_mcs_160 = IEEE80211_HE_MCS_NOT_SUPPORTED;
232 			_tx_mcs_160 = IEEE80211_HE_MCS_NOT_SUPPORTED;
233 		}
234 		if (_mcs_160 > _tx_mcs_160)
235 			_mcs_160 = _tx_mcs_160;
236 		cmd->ht_rates[i][IWL_TLC_MCS_PER_BW_160] =
237 			cpu_to_le16(rs_fw_he_ieee80211_mcs_to_rs_mcs(_mcs_160));
238 	}
239 }
240 
241 static void rs_fw_set_supp_rates(struct ieee80211_sta *sta,
242 				 struct ieee80211_supported_band *sband,
243 				 struct iwl_tlc_config_cmd_v4 *cmd)
244 {
245 	int i;
246 	u16 supp = 0;
247 	unsigned long tmp; /* must be unsigned long for for_each_set_bit */
248 	const struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
249 	const struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
250 	const struct ieee80211_sta_he_cap *he_cap = &sta->he_cap;
251 
252 	/* non HT rates */
253 	tmp = sta->supp_rates[sband->band];
254 	for_each_set_bit(i, &tmp, BITS_PER_LONG)
255 		supp |= BIT(sband->bitrates[i].hw_value);
256 
257 	cmd->non_ht_rates = cpu_to_le16(supp);
258 	cmd->mode = IWL_TLC_MNG_MODE_NON_HT;
259 
260 	/* HT/VHT rates */
261 	if (he_cap->has_he) {
262 		cmd->mode = IWL_TLC_MNG_MODE_HE;
263 		rs_fw_he_set_enabled_rates(sta, sband, cmd);
264 	} else if (vht_cap->vht_supported) {
265 		cmd->mode = IWL_TLC_MNG_MODE_VHT;
266 		rs_fw_vht_set_enabled_rates(sta, vht_cap, cmd);
267 	} else if (ht_cap->ht_supported) {
268 		cmd->mode = IWL_TLC_MNG_MODE_HT;
269 		cmd->ht_rates[IWL_TLC_NSS_1][IWL_TLC_MCS_PER_BW_80] =
270 			cpu_to_le16(ht_cap->mcs.rx_mask[0]);
271 
272 		/* the station support only a single receive chain */
273 		if (sta->smps_mode == IEEE80211_SMPS_STATIC)
274 			cmd->ht_rates[IWL_TLC_NSS_2][IWL_TLC_MCS_PER_BW_80] =
275 				0;
276 		else
277 			cmd->ht_rates[IWL_TLC_NSS_2][IWL_TLC_MCS_PER_BW_80] =
278 				cpu_to_le16(ht_cap->mcs.rx_mask[1]);
279 	}
280 }
281 
282 void iwl_mvm_tlc_update_notif(struct iwl_mvm *mvm,
283 			      struct iwl_rx_cmd_buffer *rxb)
284 {
285 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
286 	struct iwl_tlc_update_notif *notif;
287 	struct ieee80211_sta *sta;
288 	struct iwl_mvm_sta *mvmsta;
289 	struct iwl_lq_sta_rs_fw *lq_sta;
290 	u32 flags;
291 
292 	rcu_read_lock();
293 
294 	notif = (void *)pkt->data;
295 	sta = rcu_dereference(mvm->fw_id_to_mac_id[notif->sta_id]);
296 	if (IS_ERR_OR_NULL(sta)) {
297 		/* can happen in remove station flow where mvm removed internally
298 		 * the station before removing from FW
299 		 */
300 		IWL_DEBUG_RATE(mvm,
301 			       "Invalid mvm RCU pointer for sta id (%d) in TLC notification\n",
302 			       notif->sta_id);
303 		goto out;
304 	}
305 
306 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
307 
308 	if (!mvmsta) {
309 		IWL_ERR(mvm, "Invalid sta id (%d) in FW TLC notification\n",
310 			notif->sta_id);
311 		goto out;
312 	}
313 
314 	flags = le32_to_cpu(notif->flags);
315 
316 	lq_sta = &mvmsta->lq_sta.rs_fw;
317 
318 	if (flags & IWL_TLC_NOTIF_FLAG_RATE) {
319 		char pretty_rate[100];
320 
321 		if (iwl_fw_lookup_notif_ver(mvm->fw, DATA_PATH_GROUP,
322 					    TLC_MNG_UPDATE_NOTIF, 0) < 3) {
323 			rs_pretty_print_rate_v1(pretty_rate,
324 						sizeof(pretty_rate),
325 						le32_to_cpu(notif->rate));
326 			IWL_DEBUG_RATE(mvm,
327 				       "Got rate in old format. Rate: %s. Converting.\n",
328 				       pretty_rate);
329 			lq_sta->last_rate_n_flags =
330 				iwl_new_rate_from_v1(le32_to_cpu(notif->rate));
331 		} else {
332 			lq_sta->last_rate_n_flags = le32_to_cpu(notif->rate);
333 		}
334 		rs_pretty_print_rate(pretty_rate, sizeof(pretty_rate),
335 				     lq_sta->last_rate_n_flags);
336 		IWL_DEBUG_RATE(mvm, "new rate: %s\n", pretty_rate);
337 	}
338 
339 	if (flags & IWL_TLC_NOTIF_FLAG_AMSDU && !mvmsta->orig_amsdu_len) {
340 		u16 size = le32_to_cpu(notif->amsdu_size);
341 		int i;
342 
343 		if (sta->max_amsdu_len < size) {
344 			/*
345 			 * In debug sta->max_amsdu_len < size
346 			 * so also check with orig_amsdu_len which holds the
347 			 * original data before debugfs changed the value
348 			 */
349 			WARN_ON(mvmsta->orig_amsdu_len < size);
350 			goto out;
351 		}
352 
353 		mvmsta->amsdu_enabled = le32_to_cpu(notif->amsdu_enabled);
354 		mvmsta->max_amsdu_len = size;
355 		sta->max_rc_amsdu_len = mvmsta->max_amsdu_len;
356 
357 		for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
358 			if (mvmsta->amsdu_enabled & BIT(i))
359 				sta->max_tid_amsdu_len[i] =
360 					iwl_mvm_max_amsdu_size(mvm, sta, i);
361 			else
362 				/*
363 				 * Not so elegant, but this will effectively
364 				 * prevent AMSDU on this TID
365 				 */
366 				sta->max_tid_amsdu_len[i] = 1;
367 		}
368 
369 		IWL_DEBUG_RATE(mvm,
370 			       "AMSDU update. AMSDU size: %d, AMSDU selected size: %d, AMSDU TID bitmap 0x%X\n",
371 			       le32_to_cpu(notif->amsdu_size), size,
372 			       mvmsta->amsdu_enabled);
373 	}
374 out:
375 	rcu_read_unlock();
376 }
377 
378 u16 rs_fw_get_max_amsdu_len(struct ieee80211_sta *sta)
379 {
380 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
381 	const struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
382 	const struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
383 
384 	if (mvmsta->vif->bss_conf.chandef.chan->band == NL80211_BAND_6GHZ) {
385 		switch (le16_get_bits(sta->he_6ghz_capa.capa,
386 				      IEEE80211_HE_6GHZ_CAP_MAX_MPDU_LEN)) {
387 		case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
388 			return IEEE80211_MAX_MPDU_LEN_VHT_11454;
389 		case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
390 			return IEEE80211_MAX_MPDU_LEN_VHT_7991;
391 		default:
392 			return IEEE80211_MAX_MPDU_LEN_VHT_3895;
393 		}
394 	} else
395 	if (vht_cap->vht_supported) {
396 		switch (vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK) {
397 		case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
398 			return IEEE80211_MAX_MPDU_LEN_VHT_11454;
399 		case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
400 			return IEEE80211_MAX_MPDU_LEN_VHT_7991;
401 		default:
402 			return IEEE80211_MAX_MPDU_LEN_VHT_3895;
403 		}
404 	} else if (ht_cap->ht_supported) {
405 		if (ht_cap->cap & IEEE80211_HT_CAP_MAX_AMSDU)
406 			/*
407 			 * agg is offloaded so we need to assume that agg
408 			 * are enabled and max mpdu in ampdu is 4095
409 			 * (spec 802.11-2016 9.3.2.1)
410 			 */
411 			return IEEE80211_MAX_MPDU_LEN_HT_BA;
412 		else
413 			return IEEE80211_MAX_MPDU_LEN_HT_3839;
414 	}
415 
416 	/* in legacy mode no amsdu is enabled so return zero */
417 	return 0;
418 }
419 
420 void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
421 		     enum nl80211_band band, bool update)
422 {
423 	struct ieee80211_hw *hw = mvm->hw;
424 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
425 	struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw;
426 	u32 cmd_id = WIDE_ID(DATA_PATH_GROUP, TLC_MNG_CONFIG_CMD);
427 	struct ieee80211_supported_band *sband = hw->wiphy->bands[band];
428 	u16 max_amsdu_len = rs_fw_get_max_amsdu_len(sta);
429 	struct iwl_tlc_config_cmd_v4 cfg_cmd = {
430 		.sta_id = mvmsta->sta_id,
431 		.max_ch_width = update ?
432 			rs_fw_bw_from_sta_bw(sta) : RATE_MCS_CHAN_WIDTH_20,
433 		.flags = cpu_to_le16(rs_fw_get_config_flags(mvm, sta, sband)),
434 		.chains = rs_fw_set_active_chains(iwl_mvm_get_valid_tx_ant(mvm)),
435 		.sgi_ch_width_supp = rs_fw_sgi_cw_support(sta),
436 		.max_mpdu_len = iwl_mvm_is_csum_supported(mvm) ?
437 				cpu_to_le16(max_amsdu_len) : 0,
438 	};
439 	int ret;
440 	int cmd_ver;
441 
442 	memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers));
443 
444 #ifdef CONFIG_IWLWIFI_DEBUGFS
445 	iwl_mvm_reset_frame_stats(mvm);
446 #endif
447 	rs_fw_set_supp_rates(sta, sband, &cfg_cmd);
448 
449 	/*
450 	 * since TLC offload works with one mode we can assume
451 	 * that only vht/ht is used and also set it as station max amsdu
452 	 */
453 	sta->max_amsdu_len = max_amsdu_len;
454 
455 	cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw,
456 					WIDE_ID(DATA_PATH_GROUP,
457 						TLC_MNG_CONFIG_CMD),
458 					0);
459 	IWL_DEBUG_RATE(mvm, "TLC CONFIG CMD, sta_id=%d, max_ch_width=%d, mode=%d\n",
460 		       cfg_cmd.sta_id, cfg_cmd.max_ch_width, cfg_cmd.mode);
461 	IWL_DEBUG_RATE(mvm, "TLC CONFIG CMD, chains=0x%X, ch_wid_supp=%d, flags=0x%X\n",
462 		       cfg_cmd.chains, cfg_cmd.sgi_ch_width_supp, cfg_cmd.flags);
463 	IWL_DEBUG_RATE(mvm, "TLC CONFIG CMD, mpdu_len=%d, no_ht_rate=0x%X, tx_op=%d\n",
464 		       cfg_cmd.max_mpdu_len, cfg_cmd.non_ht_rates, cfg_cmd.max_tx_op);
465 	IWL_DEBUG_RATE(mvm, "TLC CONFIG CMD, ht_rate[0][0]=0x%X, ht_rate[1][0]=0x%X\n",
466 		       cfg_cmd.ht_rates[0][0], cfg_cmd.ht_rates[1][0]);
467 	IWL_DEBUG_RATE(mvm, "TLC CONFIG CMD, ht_rate[0][1]=0x%X, ht_rate[1][1]=0x%X\n",
468 		       cfg_cmd.ht_rates[0][1], cfg_cmd.ht_rates[1][1]);
469 	IWL_DEBUG_RATE(mvm, "TLC CONFIG CMD, ht_rate[0][2]=0x%X, ht_rate[1][2]=0x%X\n",
470 		       cfg_cmd.ht_rates[0][2], cfg_cmd.ht_rates[1][2]);
471 	if (cmd_ver == 4) {
472 		ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, CMD_ASYNC,
473 					   sizeof(cfg_cmd), &cfg_cmd);
474 	} else if (cmd_ver < 4) {
475 		struct iwl_tlc_config_cmd_v3 cfg_cmd_v3 = {
476 			.sta_id = cfg_cmd.sta_id,
477 			.max_ch_width = cfg_cmd.max_ch_width,
478 			.mode = cfg_cmd.mode,
479 			.chains = cfg_cmd.chains,
480 			.amsdu = !!cfg_cmd.max_mpdu_len,
481 			.flags = cfg_cmd.flags,
482 			.non_ht_rates = cfg_cmd.non_ht_rates,
483 			.ht_rates[0][0] = cfg_cmd.ht_rates[0][0],
484 			.ht_rates[0][1] = cfg_cmd.ht_rates[0][1],
485 			.ht_rates[1][0] = cfg_cmd.ht_rates[1][0],
486 			.ht_rates[1][1] = cfg_cmd.ht_rates[1][1],
487 			.sgi_ch_width_supp = cfg_cmd.sgi_ch_width_supp,
488 			.max_mpdu_len = cfg_cmd.max_mpdu_len,
489 		};
490 
491 		u16 cmd_size = sizeof(cfg_cmd_v3);
492 
493 		/* In old versions of the API the struct is 4 bytes smaller */
494 		if (iwl_fw_lookup_cmd_ver(mvm->fw,
495 					  WIDE_ID(DATA_PATH_GROUP,
496 						  TLC_MNG_CONFIG_CMD), 0) < 3)
497 			cmd_size -= 4;
498 
499 		ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, CMD_ASYNC, cmd_size,
500 					   &cfg_cmd_v3);
501 	} else {
502 		ret = -EINVAL;
503 	}
504 
505 	if (ret)
506 		IWL_ERR(mvm, "Failed to send rate scale config (%d)\n", ret);
507 }
508 
509 int rs_fw_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
510 			bool enable)
511 {
512 	/* TODO: need to introduce a new FW cmd since LQ cmd is not relevant */
513 	IWL_DEBUG_RATE(mvm, "tx protection - not implemented yet.\n");
514 	return 0;
515 }
516 
517 void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta)
518 {
519 	struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw;
520 
521 	IWL_DEBUG_RATE(mvm, "create station rate scale window\n");
522 
523 	lq_sta->pers.drv = mvm;
524 	lq_sta->pers.sta_id = mvmsta->sta_id;
525 	lq_sta->pers.chains = 0;
526 	memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal));
527 	lq_sta->pers.last_rssi = S8_MIN;
528 	lq_sta->last_rate_n_flags = 0;
529 
530 #ifdef CONFIG_MAC80211_DEBUGFS
531 	lq_sta->pers.dbg_fixed_rate = 0;
532 #endif
533 }
534