he.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * HE handling
  4 *
  5 * Copyright(c) 2017 Intel Deutschland GmbH
  6 * Copyright(c) 2019-2025 Intel Corporation
  7 */
  8
  9#include "ieee80211_i.h"
 10#include "rate.h"
 11
 12static void
 13ieee80211_update_from_he_6ghz_capa(const struct ieee80211_he_6ghz_capa *he_6ghz_capa,
 14				   struct link_sta_info *link_sta)
 15{
 16	struct sta_info *sta = link_sta->sta;
 17	enum ieee80211_smps_mode smps_mode;
 18
 19	if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
 20	    sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
 21		switch (le16_get_bits(he_6ghz_capa->capa,
 22				      IEEE80211_HE_6GHZ_CAP_SM_PS)) {
 23		case WLAN_HT_CAP_SM_PS_INVALID:
 24		case WLAN_HT_CAP_SM_PS_STATIC:
 25			smps_mode = IEEE80211_SMPS_STATIC;
 26			break;
 27		case WLAN_HT_CAP_SM_PS_DYNAMIC:
 28			smps_mode = IEEE80211_SMPS_DYNAMIC;
 29			break;
 30		case WLAN_HT_CAP_SM_PS_DISABLED:
 31			smps_mode = IEEE80211_SMPS_OFF;
 32			break;
 33		}
 34
 35		link_sta->pub->smps_mode = smps_mode;
 36	} else {
 37		link_sta->pub->smps_mode = IEEE80211_SMPS_OFF;
 38	}
 39
 40	switch (le16_get_bits(he_6ghz_capa->capa,
 41			      IEEE80211_HE_6GHZ_CAP_MAX_MPDU_LEN)) {
 42	case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
 43		link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454;
 44		break;
 45	case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
 46		link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991;
 47		break;
 48	case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
 49	default:
 50		link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895;
 51		break;
 52	}
 53
 54	ieee80211_sta_recalc_aggregates(&sta->sta);
 55
 56	link_sta->pub->he_6ghz_capa = *he_6ghz_capa;
 57}
 58
 59static void ieee80211_he_mcs_disable(__le16 *he_mcs)
 60{
 61	u32 i;
 62
 63	for (i = 0; i < 8; i++)
 64		*he_mcs |= cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
 65}
 66
 67static void ieee80211_he_mcs_intersection(__le16 *he_own_rx, __le16 *he_peer_rx,
 68					  __le16 *he_own_tx, __le16 *he_peer_tx)
 69{
 70	u32 i;
 71	u16 own_rx, own_tx, peer_rx, peer_tx;
 72
 73	for (i = 0; i < 8; i++) {
 74		own_rx = le16_to_cpu(*he_own_rx);
 75		own_rx = (own_rx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
 76
 77		own_tx = le16_to_cpu(*he_own_tx);
 78		own_tx = (own_tx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
 79
 80		peer_rx = le16_to_cpu(*he_peer_rx);
 81		peer_rx = (peer_rx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
 82
 83		peer_tx = le16_to_cpu(*he_peer_tx);
 84		peer_tx = (peer_tx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
 85
 86		if (peer_tx != IEEE80211_HE_MCS_NOT_SUPPORTED) {
 87			if (own_rx == IEEE80211_HE_MCS_NOT_SUPPORTED)
 88				peer_tx = IEEE80211_HE_MCS_NOT_SUPPORTED;
 89			else if (own_rx < peer_tx)
 90				peer_tx = own_rx;
 91		}
 92
 93		if (peer_rx != IEEE80211_HE_MCS_NOT_SUPPORTED) {
 94			if (own_tx == IEEE80211_HE_MCS_NOT_SUPPORTED)
 95				peer_rx = IEEE80211_HE_MCS_NOT_SUPPORTED;
 96			else if (own_tx < peer_rx)
 97				peer_rx = own_tx;
 98		}
 99
100		*he_peer_rx &=
101			~cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
102		*he_peer_rx |= cpu_to_le16(peer_rx << i * 2);
103
104		*he_peer_tx &=
105			~cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
106		*he_peer_tx |= cpu_to_le16(peer_tx << i * 2);
107	}
108}
109
110void
111ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
112				  struct ieee80211_supported_band *sband,
113				  const u8 *he_cap_ie, u8 he_cap_len,
114				  const struct ieee80211_he_6ghz_capa *he_6ghz_capa,
115				  struct link_sta_info *link_sta)
116{
117	struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap;
118	const struct ieee80211_sta_he_cap *own_he_cap_ptr;
119	struct ieee80211_sta_he_cap own_he_cap;
120	struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
121	u8 he_ppe_size;
122	u8 mcs_nss_size;
123	u8 he_total_size;
124	bool own_160, peer_160, own_80p80, peer_80p80;
125
126	memset(he_cap, 0, sizeof(*he_cap));
127
128	if (!he_cap_ie)
129		return;
130
131	own_he_cap_ptr =
132		ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
133	if (!own_he_cap_ptr)
134		return;
135
136	own_he_cap = *own_he_cap_ptr;
137
138	/* Make sure size is OK */
139	mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap_ie_elem);
140	he_ppe_size =
141		ieee80211_he_ppe_size(he_cap_ie[sizeof(he_cap->he_cap_elem) +
142						mcs_nss_size],
143				      he_cap_ie_elem->phy_cap_info);
144	he_total_size = sizeof(he_cap->he_cap_elem) + mcs_nss_size +
145			he_ppe_size;
146	if (he_cap_len < he_total_size)
147		return;
148
149	memcpy(&he_cap->he_cap_elem, he_cap_ie, sizeof(he_cap->he_cap_elem));
150
151	/* HE Tx/Rx HE MCS NSS Support Field */
152	memcpy(&he_cap->he_mcs_nss_supp,
153	       &he_cap_ie[sizeof(he_cap->he_cap_elem)], mcs_nss_size);
154
155	/* Check if there are (optional) PPE Thresholds */
156	if (he_cap->he_cap_elem.phy_cap_info[6] &
157	    IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT)
158		memcpy(he_cap->ppe_thres,
159		       &he_cap_ie[sizeof(he_cap->he_cap_elem) + mcs_nss_size],
160		       he_ppe_size);
161
162	he_cap->has_he = true;
163
164	link_sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(link_sta);
165	link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta);
166
167	if (sband->band == NL80211_BAND_6GHZ && he_6ghz_capa)
168		ieee80211_update_from_he_6ghz_capa(he_6ghz_capa, link_sta);
169
170	ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80,
171				      &he_cap->he_mcs_nss_supp.rx_mcs_80,
172				      &own_he_cap.he_mcs_nss_supp.tx_mcs_80,
173				      &he_cap->he_mcs_nss_supp.tx_mcs_80);
174
175	own_160 = own_he_cap.he_cap_elem.phy_cap_info[0] &
176		  IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
177	peer_160 = he_cap->he_cap_elem.phy_cap_info[0] &
178		   IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
179
180	if (peer_160 && own_160) {
181		ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_160,
182					      &he_cap->he_mcs_nss_supp.rx_mcs_160,
183					      &own_he_cap.he_mcs_nss_supp.tx_mcs_160,
184					      &he_cap->he_mcs_nss_supp.tx_mcs_160);
185	} else if (peer_160 && !own_160) {
186		ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.rx_mcs_160);
187		ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.tx_mcs_160);
188		he_cap->he_cap_elem.phy_cap_info[0] &=
189			~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
190	}
191
192	own_80p80 = own_he_cap.he_cap_elem.phy_cap_info[0] &
193		    IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
194	peer_80p80 = he_cap->he_cap_elem.phy_cap_info[0] &
195		     IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
196
197	if (peer_80p80 && own_80p80) {
198		ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80p80,
199					      &he_cap->he_mcs_nss_supp.rx_mcs_80p80,
200					      &own_he_cap.he_mcs_nss_supp.tx_mcs_80p80,
201					      &he_cap->he_mcs_nss_supp.tx_mcs_80p80);
202	} else if (peer_80p80 && !own_80p80) {
203		ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.rx_mcs_80p80);
204		ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.tx_mcs_80p80);
205		he_cap->he_cap_elem.phy_cap_info[0] &=
206			~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
207	}
208}
209
210void
211ieee80211_he_op_ie_to_bss_conf(struct ieee80211_vif *vif,
212			const struct ieee80211_he_operation *he_op_ie)
213{
214	memset(&vif->bss_conf.he_oper, 0, sizeof(vif->bss_conf.he_oper));
215	if (!he_op_ie)
216		return;
217
218	vif->bss_conf.he_oper.params = __le32_to_cpu(he_op_ie->he_oper_params);
219	vif->bss_conf.he_oper.nss_set = __le16_to_cpu(he_op_ie->he_mcs_nss_set);
220}
221
222void
223ieee80211_he_spr_ie_to_bss_conf(struct ieee80211_vif *vif,
224				const struct ieee80211_he_spr *he_spr_ie_elem)
225{
226	struct ieee80211_he_obss_pd *he_obss_pd =
227					&vif->bss_conf.he_obss_pd;
228	const u8 *data;
229
230	memset(he_obss_pd, 0, sizeof(*he_obss_pd));
231
232	if (!he_spr_ie_elem)
233		return;
234
235	he_obss_pd->sr_ctrl = he_spr_ie_elem->he_sr_control;
236	data = he_spr_ie_elem->optional;
237
238	if (he_spr_ie_elem->he_sr_control &
239	    IEEE80211_HE_SPR_NON_SRG_OFFSET_PRESENT)
240		he_obss_pd->non_srg_max_offset = *data++;
241
242	if (he_spr_ie_elem->he_sr_control &
243	    IEEE80211_HE_SPR_SRG_INFORMATION_PRESENT) {
244		he_obss_pd->min_offset = *data++;
245		he_obss_pd->max_offset = *data++;
246		memcpy(he_obss_pd->bss_color_bitmap, data, 8);
247		data += 8;
248		memcpy(he_obss_pd->partial_bssid_bitmap, data, 8);
249		he_obss_pd->enable = true;
250	}
251}
252
253static void ieee80211_link_sta_rc_update_omi(struct ieee80211_link_data *link,
254					     struct link_sta_info *link_sta)
255{
256	struct ieee80211_sub_if_data *sdata = link->sdata;
257	struct ieee80211_supported_band *sband;
258	enum ieee80211_sta_rx_bandwidth new_bw;
259	enum nl80211_band band;
260
261	band = link->conf->chanreq.oper.chan->band;
262	sband = sdata->local->hw.wiphy->bands[band];
263
264	new_bw = ieee80211_sta_cur_vht_bw(link_sta);
265	if (link_sta->pub->bandwidth == new_bw)
266		return;
267
268	link_sta->pub->bandwidth = new_bw;
269	rate_control_rate_update(sdata->local, sband, link_sta,
270				 IEEE80211_RC_BW_CHANGED);
271}
272
273bool ieee80211_prepare_rx_omi_bw(struct ieee80211_link_sta *pub_link_sta,
274				 enum ieee80211_sta_rx_bandwidth bw)
275{
276	struct sta_info *sta = container_of(pub_link_sta->sta,
277					    struct sta_info, sta);
278	struct ieee80211_local *local = sta->sdata->local;
279	struct link_sta_info *link_sta =
280		sdata_dereference(sta->link[pub_link_sta->link_id], sta->sdata);
281	struct ieee80211_link_data *link =
282		sdata_dereference(sta->sdata->link[pub_link_sta->link_id],
283				  sta->sdata);
284	struct ieee80211_chanctx_conf *conf;
285	struct ieee80211_chanctx *chanctx;
286	bool ret;
287
288	if (WARN_ON(!link || !link_sta || link_sta->pub != pub_link_sta))
289		return false;
290
291	conf = sdata_dereference(link->conf->chanctx_conf, sta->sdata);
292	if (WARN_ON(!conf))
293		return false;
294
295	trace_api_prepare_rx_omi_bw(local, sta->sdata, link_sta, bw);
296
297	chanctx = container_of(conf, typeof(*chanctx), conf);
298
299	if (link_sta->rx_omi_bw_staging == bw) {
300		ret = false;
301		goto trace;
302	}
303
304	/* must call this API in pairs */
305	if (WARN_ON(link_sta->rx_omi_bw_tx != link_sta->rx_omi_bw_staging ||
306		    link_sta->rx_omi_bw_rx != link_sta->rx_omi_bw_staging)) {
307		ret = false;
308		goto trace;
309	}
310
311	if (bw < link_sta->rx_omi_bw_staging) {
312		link_sta->rx_omi_bw_tx = bw;
313		ieee80211_link_sta_rc_update_omi(link, link_sta);
314	} else {
315		link_sta->rx_omi_bw_rx = bw;
316		ieee80211_recalc_chanctx_min_def(local, chanctx);
317	}
318
319	link_sta->rx_omi_bw_staging = bw;
320	ret = true;
321trace:
322	trace_api_return_bool(local, ret);
323	return ret;
324}
325EXPORT_SYMBOL_GPL(ieee80211_prepare_rx_omi_bw);
326
327void ieee80211_finalize_rx_omi_bw(struct ieee80211_link_sta *pub_link_sta)
328{
329	struct sta_info *sta = container_of(pub_link_sta->sta,
330					    struct sta_info, sta);
331	struct ieee80211_local *local = sta->sdata->local;
332	struct link_sta_info *link_sta =
333		sdata_dereference(sta->link[pub_link_sta->link_id], sta->sdata);
334	struct ieee80211_link_data *link =
335		sdata_dereference(sta->sdata->link[pub_link_sta->link_id],
336				  sta->sdata);
337	struct ieee80211_chanctx_conf *conf;
338	struct ieee80211_chanctx *chanctx;
339
340	if (WARN_ON(!link || !link_sta || link_sta->pub != pub_link_sta))
341		return;
342
343	conf = sdata_dereference(link->conf->chanctx_conf, sta->sdata);
344	if (WARN_ON(!conf))
345		return;
346
347	trace_api_finalize_rx_omi_bw(local, sta->sdata, link_sta);
348
349	chanctx = container_of(conf, typeof(*chanctx), conf);
350
351	if (link_sta->rx_omi_bw_tx != link_sta->rx_omi_bw_staging) {
352		/* rate control in finalize only when widening bandwidth */
353		WARN_ON(link_sta->rx_omi_bw_tx > link_sta->rx_omi_bw_staging);
354		link_sta->rx_omi_bw_tx = link_sta->rx_omi_bw_staging;
355		ieee80211_link_sta_rc_update_omi(link, link_sta);
356	}
357
358	if (link_sta->rx_omi_bw_rx != link_sta->rx_omi_bw_staging) {
359		/* channel context in finalize only when narrowing bandwidth */
360		WARN_ON(link_sta->rx_omi_bw_rx < link_sta->rx_omi_bw_staging);
361		link_sta->rx_omi_bw_rx = link_sta->rx_omi_bw_staging;
362		ieee80211_recalc_chanctx_min_def(local, chanctx);
363	}
364
365	trace_api_return_void(local);
366}
367EXPORT_SYMBOL_GPL(ieee80211_finalize_rx_omi_bw);