1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * HE handling
  4 *
  5 * Copyright(c) 2017 Intel Deutschland GmbH
  6 * Copyright(c) 2019 - 2020 Intel Corporation
  7 */
  8
  9#include "ieee80211_i.h"
 10
 11static void
 12ieee80211_update_from_he_6ghz_capa(const struct ieee80211_he_6ghz_capa *he_6ghz_capa,
 13				   struct sta_info *sta)
 14{
 15	enum ieee80211_smps_mode smps_mode;
 16
 17	if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
 18	    sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
 19		switch (le16_get_bits(he_6ghz_capa->capa,
 20				      IEEE80211_HE_6GHZ_CAP_SM_PS)) {
 21		case WLAN_HT_CAP_SM_PS_INVALID:
 22		case WLAN_HT_CAP_SM_PS_STATIC:
 23			smps_mode = IEEE80211_SMPS_STATIC;
 24			break;
 25		case WLAN_HT_CAP_SM_PS_DYNAMIC:
 26			smps_mode = IEEE80211_SMPS_DYNAMIC;
 27			break;
 28		case WLAN_HT_CAP_SM_PS_DISABLED:
 29			smps_mode = IEEE80211_SMPS_OFF;
 30			break;
 31		}
 32
 33		sta->sta.smps_mode = smps_mode;
 34	} else {
 35		sta->sta.smps_mode = IEEE80211_SMPS_OFF;
 36	}
 37
 38	switch (le16_get_bits(he_6ghz_capa->capa,
 39			      IEEE80211_HE_6GHZ_CAP_MAX_MPDU_LEN)) {
 40	case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
 41		sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454;
 42		break;
 43	case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
 44		sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991;
 45		break;
 46	case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
 47	default:
 48		sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895;
 49		break;
 50	}
 51
 52	sta->sta.he_6ghz_capa = *he_6ghz_capa;
 53}
 54
 55void
 56ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
 57				  struct ieee80211_supported_band *sband,
 58				  const u8 *he_cap_ie, u8 he_cap_len,
 59				  const struct ieee80211_he_6ghz_capa *he_6ghz_capa,
 60				  struct sta_info *sta)
 61{
 62	struct ieee80211_sta_he_cap *he_cap = &sta->sta.he_cap;
 63	struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
 64	u8 he_ppe_size;
 65	u8 mcs_nss_size;
 66	u8 he_total_size;
 67
 68	memset(he_cap, 0, sizeof(*he_cap));
 69
 70	if (!he_cap_ie || !ieee80211_get_he_sta_cap(sband))
 71		return;
 72
 73	/* Make sure size is OK */
 74	mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap_ie_elem);
 75	he_ppe_size =
 76		ieee80211_he_ppe_size(he_cap_ie[sizeof(he_cap->he_cap_elem) +
 77						mcs_nss_size],
 78				      he_cap_ie_elem->phy_cap_info);
 79	he_total_size = sizeof(he_cap->he_cap_elem) + mcs_nss_size +
 80			he_ppe_size;
 81	if (he_cap_len < he_total_size)
 82		return;
 83
 84	memcpy(&he_cap->he_cap_elem, he_cap_ie, sizeof(he_cap->he_cap_elem));
 85
 86	/* HE Tx/Rx HE MCS NSS Support Field */
 87	memcpy(&he_cap->he_mcs_nss_supp,
 88	       &he_cap_ie[sizeof(he_cap->he_cap_elem)], mcs_nss_size);
 89
 90	/* Check if there are (optional) PPE Thresholds */
 91	if (he_cap->he_cap_elem.phy_cap_info[6] &
 92	    IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT)
 93		memcpy(he_cap->ppe_thres,
 94		       &he_cap_ie[sizeof(he_cap->he_cap_elem) + mcs_nss_size],
 95		       he_ppe_size);
 96
 97	he_cap->has_he = true;
 98
 99	sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(sta);
100	sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta);
101
102	if (sband->band == NL80211_BAND_6GHZ && he_6ghz_capa)
103		ieee80211_update_from_he_6ghz_capa(he_6ghz_capa, sta);
104}
105
106void
107ieee80211_he_op_ie_to_bss_conf(struct ieee80211_vif *vif,
108			const struct ieee80211_he_operation *he_op_ie)
109{
110	memset(&vif->bss_conf.he_oper, 0, sizeof(vif->bss_conf.he_oper));
111	if (!he_op_ie)
112		return;
113
114	vif->bss_conf.he_oper.params = __le32_to_cpu(he_op_ie->he_oper_params);
115	vif->bss_conf.he_oper.nss_set = __le16_to_cpu(he_op_ie->he_mcs_nss_set);
116}
117
118void
119ieee80211_he_spr_ie_to_bss_conf(struct ieee80211_vif *vif,
120				const struct ieee80211_he_spr *he_spr_ie_elem)
121{
122	struct ieee80211_he_obss_pd *he_obss_pd =
123					&vif->bss_conf.he_obss_pd;
124	const u8 *data;
125
126	memset(he_obss_pd, 0, sizeof(*he_obss_pd));
127
128	if (!he_spr_ie_elem)
129		return;
130	data = he_spr_ie_elem->optional;
131
132	if (he_spr_ie_elem->he_sr_control &
133	    IEEE80211_HE_SPR_NON_SRG_OFFSET_PRESENT)
134		data++;
135	if (he_spr_ie_elem->he_sr_control &
136	    IEEE80211_HE_SPR_SRG_INFORMATION_PRESENT) {
137		he_obss_pd->max_offset = *data++;
138		he_obss_pd->min_offset = *data++;
139		he_obss_pd->enable = true;
140	}
141}