1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2013-2014, 2018-2019, 2022 Intel Corporation 4 * Copyright (C) 2013-2014 Intel Mobile Communications GmbH 5 */ 6 #include "mvm.h" 7 8 /* For counting bound interfaces */ 9 struct iwl_mvm_active_iface_iterator_data { 10 struct ieee80211_vif *ignore_vif; 11 struct ieee80211_sta *sta_vif_ap_sta; 12 enum iwl_sf_state sta_vif_state; 13 u32 num_active_macs; 14 }; 15 16 /* 17 * Count bound interfaces which are not p2p, besides data->ignore_vif. 18 * data->station_vif will point to one bound vif of type station, if exists. 19 */ 20 static void iwl_mvm_bound_iface_iterator(void *_data, u8 *mac, 21 struct ieee80211_vif *vif) 22 { 23 struct iwl_mvm_active_iface_iterator_data *data = _data; 24 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 25 26 if (vif == data->ignore_vif || !mvmvif->deflink.phy_ctxt || 27 vif->type == NL80211_IFTYPE_P2P_DEVICE) 28 return; 29 30 data->num_active_macs++; 31 32 if (vif->type == NL80211_IFTYPE_STATION) { 33 data->sta_vif_ap_sta = mvmvif->ap_sta; 34 if (vif->cfg.assoc) 35 data->sta_vif_state = SF_FULL_ON; 36 else 37 data->sta_vif_state = SF_INIT_OFF; 38 } 39 } 40 41 /* 42 * Aging and idle timeouts for the different possible scenarios 43 * in default configuration 44 */ 45 static const 46 __le32 sf_full_timeout_def[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = { 47 { 48 cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER_DEF), 49 cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER_DEF) 50 }, 51 { 52 cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER_DEF), 53 cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER_DEF) 54 }, 55 { 56 cpu_to_le32(SF_MCAST_AGING_TIMER_DEF), 57 cpu_to_le32(SF_MCAST_IDLE_TIMER_DEF) 58 }, 59 { 60 cpu_to_le32(SF_BA_AGING_TIMER_DEF), 61 cpu_to_le32(SF_BA_IDLE_TIMER_DEF) 62 }, 63 { 64 cpu_to_le32(SF_TX_RE_AGING_TIMER_DEF), 65 cpu_to_le32(SF_TX_RE_IDLE_TIMER_DEF) 66 }, 67 }; 68 69 /* 70 * Aging and idle timeouts for the different possible scenarios 71 * in single BSS MAC configuration. 72 */ 73 static const __le32 sf_full_timeout[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = { 74 { 75 cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER), 76 cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER) 77 }, 78 { 79 cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER), 80 cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER) 81 }, 82 { 83 cpu_to_le32(SF_MCAST_AGING_TIMER), 84 cpu_to_le32(SF_MCAST_IDLE_TIMER) 85 }, 86 { 87 cpu_to_le32(SF_BA_AGING_TIMER), 88 cpu_to_le32(SF_BA_IDLE_TIMER) 89 }, 90 { 91 cpu_to_le32(SF_TX_RE_AGING_TIMER), 92 cpu_to_le32(SF_TX_RE_IDLE_TIMER) 93 }, 94 }; 95 96 static void iwl_mvm_fill_sf_command(struct iwl_mvm *mvm, 97 struct iwl_sf_cfg_cmd *sf_cmd, 98 struct ieee80211_sta *sta) 99 { 100 int i, j, watermark; 101 u8 max_rx_nss = 0; 102 bool is_legacy = true; 103 struct ieee80211_link_sta *link_sta; 104 unsigned int link_id; 105 106 sf_cmd->watermark[SF_LONG_DELAY_ON] = cpu_to_le32(SF_W_MARK_SCAN); 107 108 /* 109 * If we are in association flow - check antenna configuration 110 * capabilities of the AP station, and choose the watermark accordingly. 111 */ 112 if (sta) { 113 /* find the maximal NSS number among all links (if relevant) */ 114 rcu_read_lock(); 115 for (link_id = 0; link_id < ARRAY_SIZE(sta->link); link_id++) { 116 link_sta = rcu_dereference(sta->link[link_id]); 117 if (!link_sta) 118 continue; 119 120 if (link_sta->ht_cap.ht_supported || 121 link_sta->vht_cap.vht_supported || 122 link_sta->eht_cap.has_eht || 123 link_sta->he_cap.has_he) { 124 is_legacy = false; 125 max_rx_nss = max(max_rx_nss, link_sta->rx_nss); 126 } 127 } 128 rcu_read_unlock(); 129 130 if (!is_legacy) { 131 switch (max_rx_nss) { 132 case 1: 133 watermark = SF_W_MARK_SISO; 134 break; 135 case 2: 136 watermark = SF_W_MARK_MIMO2; 137 break; 138 default: 139 watermark = SF_W_MARK_MIMO3; 140 break; 141 } 142 } else { 143 watermark = SF_W_MARK_LEGACY; 144 } 145 /* default watermark value for unassociated mode. */ 146 } else { 147 watermark = SF_W_MARK_MIMO2; 148 } 149 sf_cmd->watermark[SF_FULL_ON] = cpu_to_le32(watermark); 150 151 for (i = 0; i < SF_NUM_SCENARIO; i++) { 152 for (j = 0; j < SF_NUM_TIMEOUT_TYPES; j++) { 153 sf_cmd->long_delay_timeouts[i][j] = 154 cpu_to_le32(SF_LONG_DELAY_AGING_TIMER); 155 } 156 } 157 158 if (sta) { 159 BUILD_BUG_ON(sizeof(sf_full_timeout) != 160 sizeof(__le32) * SF_NUM_SCENARIO * 161 SF_NUM_TIMEOUT_TYPES); 162 163 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout, 164 sizeof(sf_full_timeout)); 165 } else { 166 BUILD_BUG_ON(sizeof(sf_full_timeout_def) != 167 sizeof(__le32) * SF_NUM_SCENARIO * 168 SF_NUM_TIMEOUT_TYPES); 169 170 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout_def, 171 sizeof(sf_full_timeout_def)); 172 } 173 } 174 175 static int iwl_mvm_sf_config(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 176 enum iwl_sf_state new_state) 177 { 178 struct iwl_sf_cfg_cmd sf_cmd = { 179 .state = cpu_to_le32(new_state), 180 }; 181 int ret = 0; 182 183 if (mvm->cfg->disable_dummy_notification) 184 sf_cmd.state |= cpu_to_le32(SF_CFG_DUMMY_NOTIF_OFF); 185 186 /* 187 * If an associated AP sta changed its antenna configuration, the state 188 * will remain FULL_ON but SF parameters need to be reconsidered. 189 */ 190 if (new_state != SF_FULL_ON && mvm->sf_state == new_state) 191 return 0; 192 193 switch (new_state) { 194 case SF_UNINIT: 195 iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL); 196 break; 197 case SF_FULL_ON: 198 if (!sta) { 199 IWL_ERR(mvm, 200 "No station: Cannot switch SF to FULL_ON\n"); 201 return -EINVAL; 202 } 203 iwl_mvm_fill_sf_command(mvm, &sf_cmd, sta); 204 break; 205 case SF_INIT_OFF: 206 iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL); 207 break; 208 default: 209 WARN_ONCE(1, "Invalid state: %d. not sending Smart Fifo cmd\n", 210 new_state); 211 return -EINVAL; 212 } 213 214 ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_SF_CFG_CMD, CMD_ASYNC, 215 sizeof(sf_cmd), &sf_cmd); 216 if (!ret) 217 mvm->sf_state = new_state; 218 219 return ret; 220 } 221 222 /* 223 * Update Smart fifo: 224 * Count bound interfaces that are not to be removed, ignoring p2p devices, 225 * and set new state accordingly. 226 */ 227 int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *changed_vif, 228 bool remove_vif) 229 { 230 enum iwl_sf_state new_state; 231 struct iwl_mvm_vif *mvmvif = NULL; 232 struct iwl_mvm_active_iface_iterator_data data = { 233 .ignore_vif = changed_vif, 234 .sta_vif_state = SF_UNINIT, 235 }; 236 struct ieee80211_sta *sta = NULL; 237 238 /* 239 * Ignore the call if we are in HW Restart flow, or if the handled 240 * vif is a p2p device. 241 */ 242 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 243 (changed_vif && changed_vif->type == NL80211_IFTYPE_P2P_DEVICE)) 244 return 0; 245 246 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 247 IEEE80211_IFACE_ITER_NORMAL, 248 iwl_mvm_bound_iface_iterator, 249 &data); 250 251 /* If changed_vif exists and is not to be removed, add to the count */ 252 if (changed_vif && !remove_vif) 253 data.num_active_macs++; 254 255 switch (data.num_active_macs) { 256 case 0: 257 /* If there are no active macs - change state to SF_INIT_OFF */ 258 new_state = SF_INIT_OFF; 259 break; 260 case 1: 261 if (remove_vif) { 262 /* The one active mac left is of type station 263 * and we filled the relevant data during iteration 264 */ 265 new_state = data.sta_vif_state; 266 sta = data.sta_vif_ap_sta; 267 } else { 268 if (WARN_ON(!changed_vif)) 269 return -EINVAL; 270 if (changed_vif->type != NL80211_IFTYPE_STATION) { 271 new_state = SF_UNINIT; 272 } else if (changed_vif->cfg.assoc && 273 changed_vif->bss_conf.dtim_period) { 274 mvmvif = iwl_mvm_vif_from_mac80211(changed_vif); 275 sta = mvmvif->ap_sta; 276 new_state = SF_FULL_ON; 277 } else { 278 new_state = SF_INIT_OFF; 279 } 280 } 281 break; 282 default: 283 /* If there are multiple active macs - change to SF_UNINIT */ 284 new_state = SF_UNINIT; 285 } 286 287 return iwl_mvm_sf_config(mvm, sta, new_state); 288 } 289