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