1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2018 Intel Corporation 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * The full GNU General Public License is included in this distribution 22 * in the file called COPYING. 23 * 24 * Contact Information: 25 * Intel Linux Wireless <linuxwifi@intel.com> 26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 27 * 28 * BSD LICENSE 29 * 30 * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved. 31 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH 32 * Copyright (C) 2018 Intel Corporation 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 39 * * Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * * Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in 43 * the documentation and/or other materials provided with the 44 * distribution. 45 * * Neither the name Intel Corporation nor the names of its 46 * contributors may be used to endorse or promote products derived 47 * from this software without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 50 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 51 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 52 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 53 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 54 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 55 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 56 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 57 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 58 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 59 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 60 * 61 *****************************************************************************/ 62 #include "mvm.h" 63 64 /* For counting bound interfaces */ 65 struct iwl_mvm_active_iface_iterator_data { 66 struct ieee80211_vif *ignore_vif; 67 u8 sta_vif_ap_sta_id; 68 enum iwl_sf_state sta_vif_state; 69 u32 num_active_macs; 70 }; 71 72 /* 73 * Count bound interfaces which are not p2p, besides data->ignore_vif. 74 * data->station_vif will point to one bound vif of type station, if exists. 75 */ 76 static void iwl_mvm_bound_iface_iterator(void *_data, u8 *mac, 77 struct ieee80211_vif *vif) 78 { 79 struct iwl_mvm_active_iface_iterator_data *data = _data; 80 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 81 82 if (vif == data->ignore_vif || !mvmvif->phy_ctxt || 83 vif->type == NL80211_IFTYPE_P2P_DEVICE) 84 return; 85 86 data->num_active_macs++; 87 88 if (vif->type == NL80211_IFTYPE_STATION) { 89 data->sta_vif_ap_sta_id = mvmvif->ap_sta_id; 90 if (vif->bss_conf.assoc) 91 data->sta_vif_state = SF_FULL_ON; 92 else 93 data->sta_vif_state = SF_INIT_OFF; 94 } 95 } 96 97 /* 98 * Aging and idle timeouts for the different possible scenarios 99 * in default configuration 100 */ 101 static const 102 __le32 sf_full_timeout_def[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = { 103 { 104 cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER_DEF), 105 cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER_DEF) 106 }, 107 { 108 cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER_DEF), 109 cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER_DEF) 110 }, 111 { 112 cpu_to_le32(SF_MCAST_AGING_TIMER_DEF), 113 cpu_to_le32(SF_MCAST_IDLE_TIMER_DEF) 114 }, 115 { 116 cpu_to_le32(SF_BA_AGING_TIMER_DEF), 117 cpu_to_le32(SF_BA_IDLE_TIMER_DEF) 118 }, 119 { 120 cpu_to_le32(SF_TX_RE_AGING_TIMER_DEF), 121 cpu_to_le32(SF_TX_RE_IDLE_TIMER_DEF) 122 }, 123 }; 124 125 /* 126 * Aging and idle timeouts for the different possible scenarios 127 * in single BSS MAC configuration. 128 */ 129 static const __le32 sf_full_timeout[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = { 130 { 131 cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER), 132 cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER) 133 }, 134 { 135 cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER), 136 cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER) 137 }, 138 { 139 cpu_to_le32(SF_MCAST_AGING_TIMER), 140 cpu_to_le32(SF_MCAST_IDLE_TIMER) 141 }, 142 { 143 cpu_to_le32(SF_BA_AGING_TIMER), 144 cpu_to_le32(SF_BA_IDLE_TIMER) 145 }, 146 { 147 cpu_to_le32(SF_TX_RE_AGING_TIMER), 148 cpu_to_le32(SF_TX_RE_IDLE_TIMER) 149 }, 150 }; 151 152 static void iwl_mvm_fill_sf_command(struct iwl_mvm *mvm, 153 struct iwl_sf_cfg_cmd *sf_cmd, 154 struct ieee80211_sta *sta) 155 { 156 int i, j, watermark; 157 158 sf_cmd->watermark[SF_LONG_DELAY_ON] = cpu_to_le32(SF_W_MARK_SCAN); 159 160 /* 161 * If we are in association flow - check antenna configuration 162 * capabilities of the AP station, and choose the watermark accordingly. 163 */ 164 if (sta) { 165 if (sta->ht_cap.ht_supported || sta->vht_cap.vht_supported) { 166 switch (sta->rx_nss) { 167 case 1: 168 watermark = SF_W_MARK_SISO; 169 break; 170 case 2: 171 watermark = SF_W_MARK_MIMO2; 172 break; 173 default: 174 watermark = SF_W_MARK_MIMO3; 175 break; 176 } 177 } else { 178 watermark = SF_W_MARK_LEGACY; 179 } 180 /* default watermark value for unassociated mode. */ 181 } else { 182 watermark = SF_W_MARK_MIMO2; 183 } 184 sf_cmd->watermark[SF_FULL_ON] = cpu_to_le32(watermark); 185 186 for (i = 0; i < SF_NUM_SCENARIO; i++) { 187 for (j = 0; j < SF_NUM_TIMEOUT_TYPES; j++) { 188 sf_cmd->long_delay_timeouts[i][j] = 189 cpu_to_le32(SF_LONG_DELAY_AGING_TIMER); 190 } 191 } 192 193 if (sta) { 194 BUILD_BUG_ON(sizeof(sf_full_timeout) != 195 sizeof(__le32) * SF_NUM_SCENARIO * 196 SF_NUM_TIMEOUT_TYPES); 197 198 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout, 199 sizeof(sf_full_timeout)); 200 } else { 201 BUILD_BUG_ON(sizeof(sf_full_timeout_def) != 202 sizeof(__le32) * SF_NUM_SCENARIO * 203 SF_NUM_TIMEOUT_TYPES); 204 205 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout_def, 206 sizeof(sf_full_timeout_def)); 207 } 208 209 } 210 211 static int iwl_mvm_sf_config(struct iwl_mvm *mvm, u8 sta_id, 212 enum iwl_sf_state new_state) 213 { 214 struct iwl_sf_cfg_cmd sf_cmd = { 215 .state = cpu_to_le32(new_state), 216 }; 217 struct ieee80211_sta *sta; 218 int ret = 0; 219 220 if (mvm->cfg->disable_dummy_notification) 221 sf_cmd.state |= cpu_to_le32(SF_CFG_DUMMY_NOTIF_OFF); 222 223 /* 224 * If an associated AP sta changed its antenna configuration, the state 225 * will remain FULL_ON but SF parameters need to be reconsidered. 226 */ 227 if (new_state != SF_FULL_ON && mvm->sf_state == new_state) 228 return 0; 229 230 switch (new_state) { 231 case SF_UNINIT: 232 iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL); 233 break; 234 case SF_FULL_ON: 235 if (sta_id == IWL_MVM_INVALID_STA) { 236 IWL_ERR(mvm, 237 "No station: Cannot switch SF to FULL_ON\n"); 238 return -EINVAL; 239 } 240 rcu_read_lock(); 241 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 242 if (IS_ERR_OR_NULL(sta)) { 243 IWL_ERR(mvm, "Invalid station id\n"); 244 rcu_read_unlock(); 245 return -EINVAL; 246 } 247 iwl_mvm_fill_sf_command(mvm, &sf_cmd, sta); 248 rcu_read_unlock(); 249 break; 250 case SF_INIT_OFF: 251 iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL); 252 break; 253 default: 254 WARN_ONCE(1, "Invalid state: %d. not sending Smart Fifo cmd\n", 255 new_state); 256 return -EINVAL; 257 } 258 259 ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_SF_CFG_CMD, CMD_ASYNC, 260 sizeof(sf_cmd), &sf_cmd); 261 if (!ret) 262 mvm->sf_state = new_state; 263 264 return ret; 265 } 266 267 /* 268 * Update Smart fifo: 269 * Count bound interfaces that are not to be removed, ignoring p2p devices, 270 * and set new state accordingly. 271 */ 272 int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *changed_vif, 273 bool remove_vif) 274 { 275 enum iwl_sf_state new_state; 276 u8 sta_id = IWL_MVM_INVALID_STA; 277 struct iwl_mvm_vif *mvmvif = NULL; 278 struct iwl_mvm_active_iface_iterator_data data = { 279 .ignore_vif = changed_vif, 280 .sta_vif_state = SF_UNINIT, 281 .sta_vif_ap_sta_id = IWL_MVM_INVALID_STA, 282 }; 283 284 /* 285 * Ignore the call if we are in HW Restart flow, or if the handled 286 * vif is a p2p device. 287 */ 288 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 289 (changed_vif && changed_vif->type == NL80211_IFTYPE_P2P_DEVICE)) 290 return 0; 291 292 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 293 IEEE80211_IFACE_ITER_NORMAL, 294 iwl_mvm_bound_iface_iterator, 295 &data); 296 297 /* If changed_vif exists and is not to be removed, add to the count */ 298 if (changed_vif && !remove_vif) 299 data.num_active_macs++; 300 301 switch (data.num_active_macs) { 302 case 0: 303 /* If there are no active macs - change state to SF_INIT_OFF */ 304 new_state = SF_INIT_OFF; 305 break; 306 case 1: 307 if (remove_vif) { 308 /* The one active mac left is of type station 309 * and we filled the relevant data during iteration 310 */ 311 new_state = data.sta_vif_state; 312 sta_id = data.sta_vif_ap_sta_id; 313 } else { 314 if (WARN_ON(!changed_vif)) 315 return -EINVAL; 316 if (changed_vif->type != NL80211_IFTYPE_STATION) { 317 new_state = SF_UNINIT; 318 } else if (changed_vif->bss_conf.assoc && 319 changed_vif->bss_conf.dtim_period) { 320 mvmvif = iwl_mvm_vif_from_mac80211(changed_vif); 321 sta_id = mvmvif->ap_sta_id; 322 new_state = SF_FULL_ON; 323 } else { 324 new_state = SF_INIT_OFF; 325 } 326 } 327 break; 328 default: 329 /* If there are multiple active macs - change to SF_UNINIT */ 330 new_state = SF_UNINIT; 331 } 332 return iwl_mvm_sf_config(mvm, sta_id, new_state); 333 } 334