rs-fw.c

  1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
  2/*
  3 * Copyright (C) 2017 Intel Deutschland GmbH
  4 * Copyright (C) 2018-2025 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
 12static u8 rs_fw_bw_from_sta_bw(const struct ieee80211_link_sta *link_sta)
 13{
 14	switch (link_sta->bandwidth) {
 15	case IEEE80211_STA_RX_BW_320:
 16		return IWL_TLC_MNG_CH_WIDTH_320MHZ;
 17	case IEEE80211_STA_RX_BW_160:
 18		return IWL_TLC_MNG_CH_WIDTH_160MHZ;
 19	case IEEE80211_STA_RX_BW_80:
 20		return IWL_TLC_MNG_CH_WIDTH_80MHZ;
 21	case IEEE80211_STA_RX_BW_40:
 22		return IWL_TLC_MNG_CH_WIDTH_40MHZ;
 23	case IEEE80211_STA_RX_BW_20:
 24	default:
 25		return IWL_TLC_MNG_CH_WIDTH_20MHZ;
 26	}
 27}
 28
 29static u8 rs_fw_set_active_chains(u8 chains)
 30{
 31	u8 fw_chains = 0;
 32
 33	if (chains & ANT_A)
 34		fw_chains |= IWL_TLC_MNG_CHAIN_A_MSK;
 35	if (chains & ANT_B)
 36		fw_chains |= IWL_TLC_MNG_CHAIN_B_MSK;
 37
 38	return fw_chains;
 39}
 40
 41static u8 rs_fw_sgi_cw_support(struct ieee80211_link_sta *link_sta)
 42{
 43	struct ieee80211_sta_ht_cap *ht_cap = &link_sta->ht_cap;
 44	struct ieee80211_sta_vht_cap *vht_cap = &link_sta->vht_cap;
 45	struct ieee80211_sta_he_cap *he_cap = &link_sta->he_cap;
 46	u8 supp = 0;
 47
 48	if (he_cap->has_he)
 49		return 0;
 50
 51	if (ht_cap->cap & IEEE80211_HT_CAP_SGI_20)
 52		supp |= BIT(IWL_TLC_MNG_CH_WIDTH_20MHZ);
 53	if (ht_cap->cap & IEEE80211_HT_CAP_SGI_40)
 54		supp |= BIT(IWL_TLC_MNG_CH_WIDTH_40MHZ);
 55	if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_80)
 56		supp |= BIT(IWL_TLC_MNG_CH_WIDTH_80MHZ);
 57	if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_160)
 58		supp |= BIT(IWL_TLC_MNG_CH_WIDTH_160MHZ);
 59
 60	return supp;
 61}
 62
 63static u16 rs_fw_get_config_flags(struct iwl_mvm *mvm,
 64				  struct ieee80211_vif *vif,
 65				  struct ieee80211_link_sta *link_sta,
 66				  const struct ieee80211_sta_he_cap *sband_he_cap)
 67{
 68	struct ieee80211_sta_ht_cap *ht_cap = &link_sta->ht_cap;
 69	struct ieee80211_sta_vht_cap *vht_cap = &link_sta->vht_cap;
 70	struct ieee80211_sta_he_cap *he_cap = &link_sta->he_cap;
 71	bool vht_ena = vht_cap->vht_supported;
 72	u16 flags = 0;
 73
 74	/* get STBC flags */
 75	if (mvm->cfg->ht_params.stbc &&
 76	    (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1)) {
 77		if (he_cap->has_he && he_cap->he_cap_elem.phy_cap_info[2] &
 78				      IEEE80211_HE_PHY_CAP2_STBC_RX_UNDER_80MHZ)
 79			flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK;
 80		else if (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK)
 81			flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK;
 82		else if (ht_cap->cap & IEEE80211_HT_CAP_RX_STBC)
 83			flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK;
 84	}
 85
 86	if (mvm->cfg->ht_params.ldpc &&
 87	    ((ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING) ||
 88	     (vht_ena && (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC))))
 89		flags |= IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK;
 90
 91	/* consider LDPC support in case of HE */
 92	if (he_cap->has_he && (he_cap->he_cap_elem.phy_cap_info[1] &
 93	    IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD))
 94		flags |= IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK;
 95
 96	if (sband_he_cap &&
 97	    !(sband_he_cap->he_cap_elem.phy_cap_info[1] &
 98			IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD))
 99		flags &= ~IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK;
100
101	if (he_cap->has_he &&
102	    (he_cap->he_cap_elem.phy_cap_info[3] &
103	     IEEE80211_HE_PHY_CAP3_DCM_MAX_CONST_RX_MASK &&
104	     sband_he_cap &&
105	     sband_he_cap->he_cap_elem.phy_cap_info[3] &
106			IEEE80211_HE_PHY_CAP3_DCM_MAX_CONST_TX_MASK))
107		flags |= IWL_TLC_MNG_CFG_FLAGS_HE_DCM_NSS_1_MSK;
108
109	return flags;
110}
111
112static
113int rs_fw_vht_highest_rx_mcs_index(const struct ieee80211_sta_vht_cap *vht_cap,
114				   int nss)
115{
116	u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) &
117		(0x3 << (2 * (nss - 1)));
118	rx_mcs >>= (2 * (nss - 1));
119
120	switch (rx_mcs) {
121	case IEEE80211_VHT_MCS_SUPPORT_0_7:
122		return IWL_TLC_MNG_HT_RATE_MCS7;
123	case IEEE80211_VHT_MCS_SUPPORT_0_8:
124		return IWL_TLC_MNG_HT_RATE_MCS8;
125	case IEEE80211_VHT_MCS_SUPPORT_0_9:
126		return IWL_TLC_MNG_HT_RATE_MCS9;
127	default:
128		WARN_ON_ONCE(1);
129		break;
130	}
131
132	return 0;
133}
134
135static void
136rs_fw_vht_set_enabled_rates(const struct ieee80211_link_sta *link_sta,
137			    const struct ieee80211_sta_vht_cap *vht_cap,
138			    struct iwl_tlc_config_cmd_v4 *cmd)
139{
140	u16 supp;
141	int i, highest_mcs;
142	u8 max_nss = link_sta->rx_nss;
143	struct ieee80211_vht_cap ieee_vht_cap = {
144		.vht_cap_info = cpu_to_le32(vht_cap->cap),
145		.supp_mcs = vht_cap->vht_mcs,
146	};
147
148	/* the station support only a single receive chain */
149	if (link_sta->smps_mode == IEEE80211_SMPS_STATIC)
150		max_nss = 1;
151
152	for (i = 0; i < max_nss && i < IWL_TLC_NSS_MAX; i++) {
153		int nss = i + 1;
154
155		highest_mcs = rs_fw_vht_highest_rx_mcs_index(vht_cap, nss);
156		if (!highest_mcs)
157			continue;
158
159		supp = BIT(highest_mcs + 1) - 1;
160		if (link_sta->bandwidth == IEEE80211_STA_RX_BW_20)
161			supp &= ~BIT(IWL_TLC_MNG_HT_RATE_MCS9);
162
163		cmd->ht_rates[i][IWL_TLC_MCS_PER_BW_80] = cpu_to_le16(supp);
164		/*
165		 * Check if VHT extended NSS indicates that the bandwidth/NSS
166		 * configuration is supported - only for MCS 0 since we already
167		 * decoded the MCS bits anyway ourselves.
168		 */
169		if (link_sta->bandwidth == IEEE80211_STA_RX_BW_160 &&
170		    ieee80211_get_vht_max_nss(&ieee_vht_cap,
171					      IEEE80211_VHT_CHANWIDTH_160MHZ,
172					      0, true, nss) >= nss)
173			cmd->ht_rates[i][IWL_TLC_MCS_PER_BW_160] =
174				cmd->ht_rates[i][IWL_TLC_MCS_PER_BW_80];
175	}
176}
177
178static u16 rs_fw_he_ieee80211_mcs_to_rs_mcs(u16 mcs)
179{
180	switch (mcs) {
181	case IEEE80211_HE_MCS_SUPPORT_0_7:
182		return BIT(IWL_TLC_MNG_HT_RATE_MCS7 + 1) - 1;
183	case IEEE80211_HE_MCS_SUPPORT_0_9:
184		return BIT(IWL_TLC_MNG_HT_RATE_MCS9 + 1) - 1;
185	case IEEE80211_HE_MCS_SUPPORT_0_11:
186		return BIT(IWL_TLC_MNG_HT_RATE_MCS11 + 1) - 1;
187	case IEEE80211_HE_MCS_NOT_SUPPORTED:
188		return 0;
189	}
190
191	WARN(1, "invalid HE MCS %d\n", mcs);
192	return 0;
193}
194
195static void
196rs_fw_he_set_enabled_rates(const struct ieee80211_link_sta *link_sta,
197			   const struct ieee80211_sta_he_cap *sband_he_cap,
198			   struct iwl_tlc_config_cmd_v4 *cmd)
199{
200	const struct ieee80211_sta_he_cap *he_cap = &link_sta->he_cap;
201	u16 mcs_160 = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160);
202	u16 mcs_80 = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80);
203	u16 tx_mcs_80 = le16_to_cpu(sband_he_cap->he_mcs_nss_supp.tx_mcs_80);
204	u16 tx_mcs_160 = le16_to_cpu(sband_he_cap->he_mcs_nss_supp.tx_mcs_160);
205	int i;
206	u8 nss = link_sta->rx_nss;
207
208	/* the station support only a single receive chain */
209	if (link_sta->smps_mode == IEEE80211_SMPS_STATIC)
210		nss = 1;
211
212	for (i = 0; i < nss && i < IWL_TLC_NSS_MAX; i++) {
213		u16 _mcs_160 = (mcs_160 >> (2 * i)) & 0x3;
214		u16 _mcs_80 = (mcs_80 >> (2 * i)) & 0x3;
215		u16 _tx_mcs_160 = (tx_mcs_160 >> (2 * i)) & 0x3;
216		u16 _tx_mcs_80 = (tx_mcs_80 >> (2 * i)) & 0x3;
217
218		/* If one side doesn't support - mark both as not supporting */
219		if (_mcs_80 == IEEE80211_HE_MCS_NOT_SUPPORTED ||
220		    _tx_mcs_80 == IEEE80211_HE_MCS_NOT_SUPPORTED) {
221			_mcs_80 = IEEE80211_HE_MCS_NOT_SUPPORTED;
222			_tx_mcs_80 = IEEE80211_HE_MCS_NOT_SUPPORTED;
223		}
224		if (_mcs_80 > _tx_mcs_80)
225			_mcs_80 = _tx_mcs_80;
226		cmd->ht_rates[i][IWL_TLC_MCS_PER_BW_80] =
227			cpu_to_le16(rs_fw_he_ieee80211_mcs_to_rs_mcs(_mcs_80));
228
229		/* If one side doesn't support - mark both as not supporting */
230		if (_mcs_160 == IEEE80211_HE_MCS_NOT_SUPPORTED ||
231		    _tx_mcs_160 == IEEE80211_HE_MCS_NOT_SUPPORTED) {
232			_mcs_160 = IEEE80211_HE_MCS_NOT_SUPPORTED;
233			_tx_mcs_160 = IEEE80211_HE_MCS_NOT_SUPPORTED;
234		}
235		if (_mcs_160 > _tx_mcs_160)
236			_mcs_160 = _tx_mcs_160;
237		cmd->ht_rates[i][IWL_TLC_MCS_PER_BW_160] =
238			cpu_to_le16(rs_fw_he_ieee80211_mcs_to_rs_mcs(_mcs_160));
239	}
240}
241
242static u8 rs_fw_eht_max_nss(u8 rx_nss, u8 tx_nss)
243{
244	u8 tx = u8_get_bits(tx_nss, IEEE80211_EHT_MCS_NSS_TX);
245	u8 rx = u8_get_bits(rx_nss, IEEE80211_EHT_MCS_NSS_RX);
246	/* the max nss that can be used,
247	 * is the min with our tx capa and the peer rx capa.
248	 */
249	return min(tx, rx);
250}
251
252#define MAX_NSS_MCS(mcs_num, rx, tx) \
253	rs_fw_eht_max_nss((rx)->rx_tx_mcs ##mcs_num## _max_nss, \
254			  (tx)->rx_tx_mcs ##mcs_num## _max_nss)
255
256static void rs_fw_set_eht_mcs_nss(__le16 ht_rates[][3],
257				  enum IWL_TLC_MCS_PER_BW bw,
258				  u8 max_nss, u16 mcs_msk)
259{
260	if (max_nss >= 2)
261		ht_rates[IWL_TLC_NSS_2][bw] |= cpu_to_le16(mcs_msk);
262
263	if (max_nss >= 1)
264		ht_rates[IWL_TLC_NSS_1][bw] |= cpu_to_le16(mcs_msk);
265}
266
267static const
268struct ieee80211_eht_mcs_nss_supp_bw *
269rs_fw_rs_mcs2eht_mcs(enum IWL_TLC_MCS_PER_BW bw,
270		     const struct ieee80211_eht_mcs_nss_supp *eht_mcs)
271{
272	switch (bw) {
273	case IWL_TLC_MCS_PER_BW_80:
274		return &eht_mcs->bw._80;
275	case IWL_TLC_MCS_PER_BW_160:
276		return &eht_mcs->bw._160;
277	case IWL_TLC_MCS_PER_BW_320:
278		return &eht_mcs->bw._320;
279	default:
280		return NULL;
281	}
282}
283
284static void
285rs_fw_eht_set_enabled_rates(struct ieee80211_vif *vif,
286			    const struct ieee80211_link_sta *link_sta,
287			    const struct ieee80211_sta_he_cap *sband_he_cap,
288			    const struct ieee80211_sta_eht_cap *sband_eht_cap,
289			    struct iwl_tlc_config_cmd_v4 *cmd)
290{
291	/* peer RX mcs capa */
292	const struct ieee80211_eht_mcs_nss_supp *eht_rx_mcs =
293		&link_sta->eht_cap.eht_mcs_nss_supp;
294	/* our TX mcs capa */
295	const struct ieee80211_eht_mcs_nss_supp *eht_tx_mcs =
296		&sband_eht_cap->eht_mcs_nss_supp;
297
298	enum IWL_TLC_MCS_PER_BW bw;
299	struct ieee80211_eht_mcs_nss_supp_20mhz_only mcs_rx_20;
300	struct ieee80211_eht_mcs_nss_supp_20mhz_only mcs_tx_20;
301
302	/* peer is 20Mhz only */
303	if (vif->type == NL80211_IFTYPE_AP &&
304	    !(link_sta->he_cap.he_cap_elem.phy_cap_info[0] &
305	      IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) {
306		mcs_rx_20 = eht_rx_mcs->only_20mhz;
307	} else {
308		mcs_rx_20.rx_tx_mcs7_max_nss = eht_rx_mcs->bw._80.rx_tx_mcs9_max_nss;
309		mcs_rx_20.rx_tx_mcs9_max_nss = eht_rx_mcs->bw._80.rx_tx_mcs9_max_nss;
310		mcs_rx_20.rx_tx_mcs11_max_nss = eht_rx_mcs->bw._80.rx_tx_mcs11_max_nss;
311		mcs_rx_20.rx_tx_mcs13_max_nss = eht_rx_mcs->bw._80.rx_tx_mcs13_max_nss;
312	}
313
314	/* nic is 20Mhz only */
315	if (!(sband_he_cap->he_cap_elem.phy_cap_info[0] &
316	      IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) {
317		mcs_tx_20 = eht_tx_mcs->only_20mhz;
318	} else {
319		mcs_tx_20.rx_tx_mcs7_max_nss = eht_tx_mcs->bw._80.rx_tx_mcs9_max_nss;
320		mcs_tx_20.rx_tx_mcs9_max_nss = eht_tx_mcs->bw._80.rx_tx_mcs9_max_nss;
321		mcs_tx_20.rx_tx_mcs11_max_nss = eht_tx_mcs->bw._80.rx_tx_mcs11_max_nss;
322		mcs_tx_20.rx_tx_mcs13_max_nss = eht_tx_mcs->bw._80.rx_tx_mcs13_max_nss;
323	}
324
325	/* rates for 20/40/80 bw */
326	bw = IWL_TLC_MCS_PER_BW_80;
327	rs_fw_set_eht_mcs_nss(cmd->ht_rates, bw,
328			      MAX_NSS_MCS(7, &mcs_rx_20, &mcs_tx_20), GENMASK(7, 0));
329	rs_fw_set_eht_mcs_nss(cmd->ht_rates, bw,
330			      MAX_NSS_MCS(9, &mcs_rx_20, &mcs_tx_20), GENMASK(9, 8));
331	rs_fw_set_eht_mcs_nss(cmd->ht_rates, bw,
332			      MAX_NSS_MCS(11, &mcs_rx_20, &mcs_tx_20), GENMASK(11, 10));
333	rs_fw_set_eht_mcs_nss(cmd->ht_rates, bw,
334			      MAX_NSS_MCS(13, &mcs_rx_20, &mcs_tx_20), GENMASK(13, 12));
335
336	/* rate for 160/320 bw */
337	for (bw = IWL_TLC_MCS_PER_BW_160; bw <= IWL_TLC_MCS_PER_BW_320; bw++) {
338		const struct ieee80211_eht_mcs_nss_supp_bw *mcs_rx =
339			rs_fw_rs_mcs2eht_mcs(bw, eht_rx_mcs);
340		const struct ieee80211_eht_mcs_nss_supp_bw *mcs_tx =
341			rs_fw_rs_mcs2eht_mcs(bw, eht_tx_mcs);
342
343		/* got unsupported index for bw */
344		if (!mcs_rx || !mcs_tx)
345			continue;
346
347		/* break out if we don't support the bandwidth */
348		if (cmd->max_ch_width < (bw + IWL_TLC_MNG_CH_WIDTH_80MHZ))
349			break;
350
351		rs_fw_set_eht_mcs_nss(cmd->ht_rates, bw,
352				      MAX_NSS_MCS(9, mcs_rx, mcs_tx), GENMASK(9, 0));
353		rs_fw_set_eht_mcs_nss(cmd->ht_rates, bw,
354				      MAX_NSS_MCS(11, mcs_rx, mcs_tx), GENMASK(11, 10));
355		rs_fw_set_eht_mcs_nss(cmd->ht_rates, bw,
356				      MAX_NSS_MCS(13, mcs_rx, mcs_tx), GENMASK(13, 12));
357	}
358
359	/* the station support only a single receive chain */
360	if (link_sta->smps_mode == IEEE80211_SMPS_STATIC ||
361	    link_sta->rx_nss < 2)
362		memset(cmd->ht_rates[IWL_TLC_NSS_2], 0,
363		       sizeof(cmd->ht_rates[IWL_TLC_NSS_2]));
364}
365
366static void rs_fw_set_supp_rates(struct ieee80211_vif *vif,
367				 struct ieee80211_link_sta *link_sta,
368				 struct ieee80211_supported_band *sband,
369				 const struct ieee80211_sta_he_cap *sband_he_cap,
370				 const struct ieee80211_sta_eht_cap *sband_eht_cap,
371				 struct iwl_tlc_config_cmd_v4 *cmd)
372{
373	int i;
374	u16 supp = 0;
375	unsigned long tmp; /* must be unsigned long for for_each_set_bit */
376	const struct ieee80211_sta_ht_cap *ht_cap = &link_sta->ht_cap;
377	const struct ieee80211_sta_vht_cap *vht_cap = &link_sta->vht_cap;
378	const struct ieee80211_sta_he_cap *he_cap = &link_sta->he_cap;
379
380	/* non HT rates */
381	tmp = link_sta->supp_rates[sband->band];
382	for_each_set_bit(i, &tmp, BITS_PER_LONG)
383		supp |= BIT(sband->bitrates[i].hw_value);
384
385	cmd->non_ht_rates = cpu_to_le16(supp);
386	cmd->mode = IWL_TLC_MNG_MODE_NON_HT;
387
388	/* HT/VHT rates */
389	if (link_sta->eht_cap.has_eht && sband_he_cap && sband_eht_cap) {
390		cmd->mode = IWL_TLC_MNG_MODE_EHT;
391		rs_fw_eht_set_enabled_rates(vif, link_sta, sband_he_cap,
392					    sband_eht_cap, cmd);
393	} else if (he_cap->has_he && sband_he_cap) {
394		cmd->mode = IWL_TLC_MNG_MODE_HE;
395		rs_fw_he_set_enabled_rates(link_sta, sband_he_cap, cmd);
396	} else if (vht_cap->vht_supported) {
397		cmd->mode = IWL_TLC_MNG_MODE_VHT;
398		rs_fw_vht_set_enabled_rates(link_sta, vht_cap, cmd);
399	} else if (ht_cap->ht_supported) {
400		cmd->mode = IWL_TLC_MNG_MODE_HT;
401		cmd->ht_rates[IWL_TLC_NSS_1][IWL_TLC_MCS_PER_BW_80] =
402			cpu_to_le16(ht_cap->mcs.rx_mask[0]);
403
404		/* the station support only a single receive chain */
405		if (link_sta->smps_mode == IEEE80211_SMPS_STATIC)
406			cmd->ht_rates[IWL_TLC_NSS_2][IWL_TLC_MCS_PER_BW_80] =
407				0;
408		else
409			cmd->ht_rates[IWL_TLC_NSS_2][IWL_TLC_MCS_PER_BW_80] =
410				cpu_to_le16(ht_cap->mcs.rx_mask[1]);
411	}
412}
413
414void iwl_mvm_tlc_update_notif(struct iwl_mvm *mvm,
415			      struct iwl_rx_cmd_buffer *rxb)
416{
417	struct iwl_rx_packet *pkt = rxb_addr(rxb);
418	struct iwl_tlc_update_notif *notif;
419	struct ieee80211_sta *sta;
420	struct ieee80211_link_sta *link_sta;
421	struct iwl_mvm_sta *mvmsta;
422	struct iwl_mvm_link_sta *mvm_link_sta;
423	struct iwl_lq_sta_rs_fw *lq_sta;
424	u32 flags;
425
426	rcu_read_lock();
427
428	notif = (void *)pkt->data;
429	link_sta = rcu_dereference(mvm->fw_id_to_link_sta[notif->sta_id]);
430	sta = rcu_dereference(mvm->fw_id_to_mac_id[notif->sta_id]);
431	if (IS_ERR_OR_NULL(sta) || !link_sta) {
432		/* can happen in remove station flow where mvm removed internally
433		 * the station before removing from FW
434		 */
435		IWL_DEBUG_RATE(mvm,
436			       "Invalid mvm RCU pointer for sta id (%d) in TLC notification\n",
437			       notif->sta_id);
438		goto out;
439	}
440
441	mvmsta = iwl_mvm_sta_from_mac80211(sta);
442
443	flags = le32_to_cpu(notif->flags);
444
445	mvm_link_sta = rcu_dereference(mvmsta->link[link_sta->link_id]);
446	if (!mvm_link_sta) {
447		IWL_DEBUG_RATE(mvm,
448			       "Invalid mvmsta RCU pointer for link (%d) of  sta id (%d) in TLC notification\n",
449			       link_sta->link_id, notif->sta_id);
450		goto out;
451	}
452	lq_sta = &mvm_link_sta->lq_sta.rs_fw;
453
454	if (flags & IWL_TLC_NOTIF_FLAG_RATE) {
455		char pretty_rate[100];
456
457		lq_sta->last_rate_n_flags =
458			iwl_mvm_v3_rate_from_fw(notif->rate, mvm->fw_rates_ver);
459		rs_pretty_print_rate(pretty_rate, sizeof(pretty_rate),
460				     lq_sta->last_rate_n_flags);
461		IWL_DEBUG_RATE(mvm, "rate: %s\n", pretty_rate);
462	}
463
464	if (flags & IWL_TLC_NOTIF_FLAG_AMSDU && !mvm_link_sta->orig_amsdu_len) {
465		u32 enabled = le32_to_cpu(notif->amsdu_enabled);
466		u16 size = le32_to_cpu(notif->amsdu_size);
467		int i;
468
469		if (size < 2000) {
470			size = 0;
471			enabled = 0;
472		}
473
474		if (link_sta->agg.max_amsdu_len < size) {
475			/*
476			 * In debug link_sta->agg.max_amsdu_len < size
477			 * so also check with orig_amsdu_len which holds the
478			 * original data before debugfs changed the value
479			 */
480			WARN_ON(mvm_link_sta->orig_amsdu_len < size);
481			goto out;
482		}
483
484		mvmsta->amsdu_enabled = enabled;
485		mvmsta->max_amsdu_len = size;
486		link_sta->agg.max_rc_amsdu_len = mvmsta->max_amsdu_len;
487
488		for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
489			if (mvmsta->amsdu_enabled & BIT(i))
490				link_sta->agg.max_tid_amsdu_len[i] =
491					iwl_mvm_max_amsdu_size(mvm, sta, i);
492			else
493				/*
494				 * Not so elegant, but this will effectively
495				 * prevent AMSDU on this TID
496				 */
497				link_sta->agg.max_tid_amsdu_len[i] = 1;
498		}
499
500		ieee80211_sta_recalc_aggregates(sta);
501
502		IWL_DEBUG_RATE(mvm,
503			       "AMSDU update. AMSDU size: %d, AMSDU selected size: %d, AMSDU TID bitmap 0x%X\n",
504			       le32_to_cpu(notif->amsdu_size), size,
505			       mvmsta->amsdu_enabled);
506	}
507out:
508	rcu_read_unlock();
509}
510
511u16 rs_fw_get_max_amsdu_len(struct ieee80211_sta *sta,
512			    struct ieee80211_bss_conf *link_conf,
513			    struct ieee80211_link_sta *link_sta)
514{
515	const struct ieee80211_sta_vht_cap *vht_cap = &link_sta->vht_cap;
516	const struct ieee80211_sta_ht_cap *ht_cap = &link_sta->ht_cap;
517	const struct ieee80211_sta_eht_cap *eht_cap = &link_sta->eht_cap;
518
519	if (WARN_ON_ONCE(!link_conf->chanreq.oper.chan))
520		return IEEE80211_MAX_MPDU_LEN_VHT_3895;
521
522	if (link_conf->chanreq.oper.chan->band == NL80211_BAND_6GHZ) {
523		switch (le16_get_bits(link_sta->he_6ghz_capa.capa,
524				      IEEE80211_HE_6GHZ_CAP_MAX_MPDU_LEN)) {
525		case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
526			return IEEE80211_MAX_MPDU_LEN_VHT_11454;
527		case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
528			return IEEE80211_MAX_MPDU_LEN_VHT_7991;
529		default:
530			return IEEE80211_MAX_MPDU_LEN_VHT_3895;
531		}
532	} else if (link_conf->chanreq.oper.chan->band == NL80211_BAND_2GHZ &&
533		   eht_cap->has_eht) {
534		switch (u8_get_bits(eht_cap->eht_cap_elem.mac_cap_info[0],
535				    IEEE80211_EHT_MAC_CAP0_MAX_MPDU_LEN_MASK)) {
536		case IEEE80211_EHT_MAC_CAP0_MAX_MPDU_LEN_11454:
537			return IEEE80211_MAX_MPDU_LEN_VHT_11454;
538		case IEEE80211_EHT_MAC_CAP0_MAX_MPDU_LEN_7991:
539			return IEEE80211_MAX_MPDU_LEN_VHT_7991;
540		default:
541			return IEEE80211_MAX_MPDU_LEN_VHT_3895;
542		}
543	} else if (vht_cap->vht_supported) {
544		switch (vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK) {
545		case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
546			return IEEE80211_MAX_MPDU_LEN_VHT_11454;
547		case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
548			return IEEE80211_MAX_MPDU_LEN_VHT_7991;
549		default:
550			return IEEE80211_MAX_MPDU_LEN_VHT_3895;
551		}
552	} else if (ht_cap->ht_supported) {
553		if (ht_cap->cap & IEEE80211_HT_CAP_MAX_AMSDU)
554			/*
555			 * agg is offloaded so we need to assume that agg
556			 * are enabled and max mpdu in ampdu is 4095
557			 * (spec 802.11-2016 9.3.2.1)
558			 */
559			return IEEE80211_MAX_MPDU_LEN_HT_BA;
560		else
561			return IEEE80211_MAX_MPDU_LEN_HT_3839;
562	}
563
564	/* in legacy mode no amsdu is enabled so return zero */
565	return 0;
566}
567
568void iwl_mvm_rs_fw_rate_init(struct iwl_mvm *mvm,
569			     struct ieee80211_vif *vif,
570			     struct ieee80211_sta *sta,
571			     struct ieee80211_bss_conf *link_conf,
572			     struct ieee80211_link_sta *link_sta,
573			     enum nl80211_band band)
574{
575	struct ieee80211_hw *hw = mvm->hw;
576	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
577	u32 cmd_id = WIDE_ID(DATA_PATH_GROUP, TLC_MNG_CONFIG_CMD);
578	struct ieee80211_supported_band *sband = hw->wiphy->bands[band];
579	u16 max_amsdu_len = rs_fw_get_max_amsdu_len(sta, link_conf, link_sta);
580	const struct ieee80211_sta_he_cap *sband_he_cap =
581		ieee80211_get_he_iftype_cap_vif(sband, vif);
582	const struct ieee80211_sta_eht_cap *sband_eht_cap =
583		ieee80211_get_eht_iftype_cap_vif(sband, vif);
584	struct iwl_mvm_link_sta *mvm_link_sta;
585	struct iwl_lq_sta_rs_fw *lq_sta;
586	struct iwl_tlc_config_cmd_v4 cfg_cmd = {
587		.max_ch_width = mvmsta->authorized ?
588			rs_fw_bw_from_sta_bw(link_sta) : IWL_TLC_MNG_CH_WIDTH_20MHZ,
589		.flags = cpu_to_le16(rs_fw_get_config_flags(mvm, vif, link_sta,
590							    sband_he_cap)),
591		.chains = rs_fw_set_active_chains(iwl_mvm_get_valid_tx_ant(mvm)),
592		.sgi_ch_width_supp = rs_fw_sgi_cw_support(link_sta),
593		.max_mpdu_len = iwl_mvm_is_csum_supported(mvm) ?
594				cpu_to_le16(max_amsdu_len) : 0,
595	};
596	unsigned int link_id = link_conf->link_id;
597	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
598	int cmd_ver;
599	int ret;
600
601	/* Enable extra EHT LTF if there's mutual support by AP and client */
602	if (sband_eht_cap &&
603	    sband_eht_cap->eht_cap_elem.phy_cap_info[5] &
604		IEEE80211_EHT_PHY_CAP5_SUPP_EXTRA_EHT_LTF &&
605	    link_sta->eht_cap.has_eht &&
606	    link_sta->eht_cap.eht_cap_elem.phy_cap_info[5] &
607	    IEEE80211_EHT_PHY_CAP5_SUPP_EXTRA_EHT_LTF) {
608		IWL_DEBUG_RATE(mvm, "Set support for Extra EHT LTF\n");
609		cfg_cmd.flags |=
610			cpu_to_le16(IWL_TLC_MNG_CFG_FLAGS_EHT_EXTRA_LTF_MSK);
611	}
612
613	rcu_read_lock();
614	mvm_link_sta = rcu_dereference(mvmsta->link[link_id]);
615	if (WARN_ON_ONCE(!mvm_link_sta)) {
616		rcu_read_unlock();
617		return;
618	}
619
620	cfg_cmd.sta_id = mvm_link_sta->sta_id;
621
622	lq_sta = &mvm_link_sta->lq_sta.rs_fw;
623	memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers));
624
625	rcu_read_unlock();
626
627#ifdef CONFIG_IWLWIFI_DEBUGFS
628	iwl_mvm_reset_frame_stats(mvm);
629#endif
630	rs_fw_set_supp_rates(vif, link_sta, sband,
631			     sband_he_cap, sband_eht_cap,
632			     &cfg_cmd);
633
634	/*
635	 * since TLC offload works with one mode we can assume
636	 * that only vht/ht is used and also set it as station max amsdu
637	 */
638	link_sta->agg.max_amsdu_len = max_amsdu_len;
639	ieee80211_sta_recalc_aggregates(sta);
640
641	cfg_cmd.max_tx_op = cpu_to_le16(mvmvif->max_tx_op);
642
643	cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw, cmd_id, 0);
644	IWL_DEBUG_RATE(mvm, "TLC CONFIG CMD, sta_id=%d, max_ch_width=%d, mode=%d\n",
645		       cfg_cmd.sta_id, cfg_cmd.max_ch_width, cfg_cmd.mode);
646	IWL_DEBUG_RATE(mvm, "TLC CONFIG CMD, chains=0x%X, ch_wid_supp=%d, flags=0x%X\n",
647		       cfg_cmd.chains, cfg_cmd.sgi_ch_width_supp, cfg_cmd.flags);
648	IWL_DEBUG_RATE(mvm, "TLC CONFIG CMD, mpdu_len=%d, no_ht_rate=0x%X, tx_op=%d\n",
649		       cfg_cmd.max_mpdu_len, cfg_cmd.non_ht_rates, cfg_cmd.max_tx_op);
650	IWL_DEBUG_RATE(mvm, "TLC CONFIG CMD, ht_rate[0][0]=0x%X, ht_rate[1][0]=0x%X\n",
651		       cfg_cmd.ht_rates[0][0], cfg_cmd.ht_rates[1][0]);
652	IWL_DEBUG_RATE(mvm, "TLC CONFIG CMD, ht_rate[0][1]=0x%X, ht_rate[1][1]=0x%X\n",
653		       cfg_cmd.ht_rates[0][1], cfg_cmd.ht_rates[1][1]);
654	IWL_DEBUG_RATE(mvm, "TLC CONFIG CMD, ht_rate[0][2]=0x%X, ht_rate[1][2]=0x%X\n",
655		       cfg_cmd.ht_rates[0][2], cfg_cmd.ht_rates[1][2]);
656	if (cmd_ver == 4) {
657		ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, CMD_ASYNC,
658					   sizeof(cfg_cmd), &cfg_cmd);
659	} else if (cmd_ver < 4) {
660		struct iwl_tlc_config_cmd_v3 cfg_cmd_v3 = {
661			.sta_id = cfg_cmd.sta_id,
662			.max_ch_width = cfg_cmd.max_ch_width,
663			.mode = cfg_cmd.mode,
664			.chains = cfg_cmd.chains,
665			.amsdu = !!cfg_cmd.max_mpdu_len,
666			.flags = cfg_cmd.flags,
667			.non_ht_rates = cfg_cmd.non_ht_rates,
668			.ht_rates[0][0] = cfg_cmd.ht_rates[0][0],
669			.ht_rates[0][1] = cfg_cmd.ht_rates[0][1],
670			.ht_rates[1][0] = cfg_cmd.ht_rates[1][0],
671			.ht_rates[1][1] = cfg_cmd.ht_rates[1][1],
672			.sgi_ch_width_supp = cfg_cmd.sgi_ch_width_supp,
673			.max_mpdu_len = cfg_cmd.max_mpdu_len,
674		};
675
676		u16 cmd_size = sizeof(cfg_cmd_v3);
677
678		/* In old versions of the API the struct is 4 bytes smaller */
679		if (iwl_fw_lookup_cmd_ver(mvm->fw, cmd_id, 0) < 3)
680			cmd_size -= 4;
681
682		ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, CMD_ASYNC, cmd_size,
683					   &cfg_cmd_v3);
684	} else {
685		ret = -EINVAL;
686	}
687
688	if (ret)
689		IWL_ERR(mvm, "Failed to send rate scale config (%d)\n", ret);
690}
691
692int rs_fw_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
693			bool enable)
694{
695	/* TODO: need to introduce a new FW cmd since LQ cmd is not relevant */
696	IWL_DEBUG_RATE(mvm, "tx protection - not implemented yet.\n");
697	return 0;
698}
699
700void iwl_mvm_rs_add_sta_link(struct iwl_mvm *mvm,
701			     struct iwl_mvm_link_sta *link_sta)
702{
703	struct iwl_lq_sta_rs_fw *lq_sta;
704
705	lq_sta = &link_sta->lq_sta.rs_fw;
706
707	lq_sta->pers.drv = mvm;
708	lq_sta->pers.sta_id = link_sta->sta_id;
709	lq_sta->pers.chains = 0;
710	memset(lq_sta->pers.chain_signal, 0,
711	       sizeof(lq_sta->pers.chain_signal));
712	lq_sta->pers.last_rssi = S8_MIN;
713	lq_sta->last_rate_n_flags = 0;
714
715#ifdef CONFIG_MAC80211_DEBUGFS
716	lq_sta->pers.dbg_fixed_rate = 0;
717#endif
718}
719
720void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta)
721{
722	unsigned int link_id;
723
724	IWL_DEBUG_RATE(mvm, "create station rate scale window\n");
725
726	for (link_id = 0; link_id < ARRAY_SIZE(mvmsta->link); link_id++) {
727		struct iwl_mvm_link_sta *link =
728			rcu_dereference_protected(mvmsta->link[link_id],
729						  lockdep_is_held(&mvm->mutex));
730		if (!link)
731			continue;
732
733		iwl_mvm_rs_add_sta_link(mvm, link);
734	}
735}