1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2013-2014, 2018-2019 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 u8 sta_vif_ap_sta_id; 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->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_id = mvmvif->ap_sta_id; 34 if (vif->bss_conf.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; 101 102 sf_cmd->watermark[SF_LONG_DELAY_ON] = cpu_to_le32(SF_W_MARK_SCAN); 103 104 /* 105 * If we are in association flow - check antenna configuration 106 * capabilities of the AP station, and choose the watermark accordingly. 107 */ 108 if (sta) { 109 if (sta->ht_cap.ht_supported || 110 sta->vht_cap.vht_supported || 111 sta->he_cap.has_he) { 112 switch (sta->rx_nss) { 113 case 1: 114 watermark = SF_W_MARK_SISO; 115 break; 116 case 2: 117 watermark = SF_W_MARK_MIMO2; 118 break; 119 default: 120 watermark = SF_W_MARK_MIMO3; 121 break; 122 } 123 } else { 124 watermark = SF_W_MARK_LEGACY; 125 } 126 /* default watermark value for unassociated mode. */ 127 } else { 128 watermark = SF_W_MARK_MIMO2; 129 } 130 sf_cmd->watermark[SF_FULL_ON] = cpu_to_le32(watermark); 131 132 for (i = 0; i < SF_NUM_SCENARIO; i++) { 133 for (j = 0; j < SF_NUM_TIMEOUT_TYPES; j++) { 134 sf_cmd->long_delay_timeouts[i][j] = 135 cpu_to_le32(SF_LONG_DELAY_AGING_TIMER); 136 } 137 } 138 139 if (sta) { 140 BUILD_BUG_ON(sizeof(sf_full_timeout) != 141 sizeof(__le32) * SF_NUM_SCENARIO * 142 SF_NUM_TIMEOUT_TYPES); 143 144 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout, 145 sizeof(sf_full_timeout)); 146 } else { 147 BUILD_BUG_ON(sizeof(sf_full_timeout_def) != 148 sizeof(__le32) * SF_NUM_SCENARIO * 149 SF_NUM_TIMEOUT_TYPES); 150 151 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout_def, 152 sizeof(sf_full_timeout_def)); 153 } 154 155 } 156 157 static int iwl_mvm_sf_config(struct iwl_mvm *mvm, u8 sta_id, 158 enum iwl_sf_state new_state) 159 { 160 struct iwl_sf_cfg_cmd sf_cmd = { 161 .state = cpu_to_le32(new_state), 162 }; 163 struct ieee80211_sta *sta; 164 int ret = 0; 165 166 if (mvm->cfg->disable_dummy_notification) 167 sf_cmd.state |= cpu_to_le32(SF_CFG_DUMMY_NOTIF_OFF); 168 169 /* 170 * If an associated AP sta changed its antenna configuration, the state 171 * will remain FULL_ON but SF parameters need to be reconsidered. 172 */ 173 if (new_state != SF_FULL_ON && mvm->sf_state == new_state) 174 return 0; 175 176 switch (new_state) { 177 case SF_UNINIT: 178 iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL); 179 break; 180 case SF_FULL_ON: 181 if (sta_id == IWL_MVM_INVALID_STA) { 182 IWL_ERR(mvm, 183 "No station: Cannot switch SF to FULL_ON\n"); 184 return -EINVAL; 185 } 186 rcu_read_lock(); 187 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 188 if (IS_ERR_OR_NULL(sta)) { 189 IWL_ERR(mvm, "Invalid station id\n"); 190 rcu_read_unlock(); 191 return -EINVAL; 192 } 193 iwl_mvm_fill_sf_command(mvm, &sf_cmd, sta); 194 rcu_read_unlock(); 195 break; 196 case SF_INIT_OFF: 197 iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL); 198 break; 199 default: 200 WARN_ONCE(1, "Invalid state: %d. not sending Smart Fifo cmd\n", 201 new_state); 202 return -EINVAL; 203 } 204 205 ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_SF_CFG_CMD, CMD_ASYNC, 206 sizeof(sf_cmd), &sf_cmd); 207 if (!ret) 208 mvm->sf_state = new_state; 209 210 return ret; 211 } 212 213 /* 214 * Update Smart fifo: 215 * Count bound interfaces that are not to be removed, ignoring p2p devices, 216 * and set new state accordingly. 217 */ 218 int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *changed_vif, 219 bool remove_vif) 220 { 221 enum iwl_sf_state new_state; 222 u8 sta_id = IWL_MVM_INVALID_STA; 223 struct iwl_mvm_vif *mvmvif = NULL; 224 struct iwl_mvm_active_iface_iterator_data data = { 225 .ignore_vif = changed_vif, 226 .sta_vif_state = SF_UNINIT, 227 .sta_vif_ap_sta_id = IWL_MVM_INVALID_STA, 228 }; 229 230 /* 231 * Ignore the call if we are in HW Restart flow, or if the handled 232 * vif is a p2p device. 233 */ 234 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 235 (changed_vif && changed_vif->type == NL80211_IFTYPE_P2P_DEVICE)) 236 return 0; 237 238 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 239 IEEE80211_IFACE_ITER_NORMAL, 240 iwl_mvm_bound_iface_iterator, 241 &data); 242 243 /* If changed_vif exists and is not to be removed, add to the count */ 244 if (changed_vif && !remove_vif) 245 data.num_active_macs++; 246 247 switch (data.num_active_macs) { 248 case 0: 249 /* If there are no active macs - change state to SF_INIT_OFF */ 250 new_state = SF_INIT_OFF; 251 break; 252 case 1: 253 if (remove_vif) { 254 /* The one active mac left is of type station 255 * and we filled the relevant data during iteration 256 */ 257 new_state = data.sta_vif_state; 258 sta_id = data.sta_vif_ap_sta_id; 259 } else { 260 if (WARN_ON(!changed_vif)) 261 return -EINVAL; 262 if (changed_vif->type != NL80211_IFTYPE_STATION) { 263 new_state = SF_UNINIT; 264 } else if (changed_vif->bss_conf.assoc && 265 changed_vif->bss_conf.dtim_period) { 266 mvmvif = iwl_mvm_vif_from_mac80211(changed_vif); 267 sta_id = mvmvif->ap_sta_id; 268 new_state = SF_FULL_ON; 269 } else { 270 new_state = SF_INIT_OFF; 271 } 272 } 273 break; 274 default: 275 /* If there are multiple active macs - change to SF_UNINIT */ 276 new_state = SF_UNINIT; 277 } 278 return iwl_mvm_sf_config(mvm, sta_id, new_state); 279 } 280