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 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 23 * USA 24 * 25 * The full GNU General Public License is included in this distribution 26 * in the file called COPYING. 27 * 28 * Contact Information: 29 * Intel Linux Wireless <ilw@linux.intel.com> 30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 31 * 32 * BSD LICENSE 33 * 34 * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved. 35 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH 36 * All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 42 * * Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * * Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in 46 * the documentation and/or other materials provided with the 47 * distribution. 48 * * Neither the name Intel Corporation nor the names of its 49 * contributors may be used to endorse or promote products derived 50 * from this software without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 63 * 64 *****************************************************************************/ 65#include "mvm.h" 66 67/* For counting bound interfaces */ 68struct iwl_mvm_active_iface_iterator_data { 69 struct ieee80211_vif *ignore_vif; 70 u8 sta_vif_ap_sta_id; 71 enum iwl_sf_state sta_vif_state; 72 int num_active_macs; 73}; 74 75/* 76 * Count bound interfaces which are not p2p, besides data->ignore_vif. 77 * data->station_vif will point to one bound vif of type station, if exists. 78 */ 79static void iwl_mvm_bound_iface_iterator(void *_data, u8 *mac, 80 struct ieee80211_vif *vif) 81{ 82 struct iwl_mvm_active_iface_iterator_data *data = _data; 83 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 84 85 if (vif == data->ignore_vif || !mvmvif->phy_ctxt || 86 vif->type == NL80211_IFTYPE_P2P_DEVICE) 87 return; 88 89 data->num_active_macs++; 90 91 if (vif->type == NL80211_IFTYPE_STATION) { 92 data->sta_vif_ap_sta_id = mvmvif->ap_sta_id; 93 if (vif->bss_conf.assoc) 94 data->sta_vif_state = SF_FULL_ON; 95 else 96 data->sta_vif_state = SF_INIT_OFF; 97 } 98} 99 100/* 101 * Aging and idle timeouts for the different possible scenarios 102 * in default configuration 103 */ 104static const 105__le32 sf_full_timeout_def[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = { 106 { 107 cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER_DEF), 108 cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER_DEF) 109 }, 110 { 111 cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER_DEF), 112 cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER_DEF) 113 }, 114 { 115 cpu_to_le32(SF_MCAST_AGING_TIMER_DEF), 116 cpu_to_le32(SF_MCAST_IDLE_TIMER_DEF) 117 }, 118 { 119 cpu_to_le32(SF_BA_AGING_TIMER_DEF), 120 cpu_to_le32(SF_BA_IDLE_TIMER_DEF) 121 }, 122 { 123 cpu_to_le32(SF_TX_RE_AGING_TIMER_DEF), 124 cpu_to_le32(SF_TX_RE_IDLE_TIMER_DEF) 125 }, 126}; 127 128/* 129 * Aging and idle timeouts for the different possible scenarios 130 * in single BSS MAC configuration. 131 */ 132static const __le32 sf_full_timeout[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = { 133 { 134 cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER), 135 cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER) 136 }, 137 { 138 cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER), 139 cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER) 140 }, 141 { 142 cpu_to_le32(SF_MCAST_AGING_TIMER), 143 cpu_to_le32(SF_MCAST_IDLE_TIMER) 144 }, 145 { 146 cpu_to_le32(SF_BA_AGING_TIMER), 147 cpu_to_le32(SF_BA_IDLE_TIMER) 148 }, 149 { 150 cpu_to_le32(SF_TX_RE_AGING_TIMER), 151 cpu_to_le32(SF_TX_RE_IDLE_TIMER) 152 }, 153}; 154 155static void iwl_mvm_fill_sf_command(struct iwl_mvm *mvm, 156 struct iwl_sf_cfg_cmd *sf_cmd, 157 struct ieee80211_sta *sta) 158{ 159 int i, j, watermark; 160 161 sf_cmd->watermark[SF_LONG_DELAY_ON] = cpu_to_le32(SF_W_MARK_SCAN); 162 163 /* 164 * If we are in association flow - check antenna configuration 165 * capabilities of the AP station, and choose the watermark accordingly. 166 */ 167 if (sta) { 168 if (sta->ht_cap.ht_supported || sta->vht_cap.vht_supported) { 169 switch (sta->rx_nss) { 170 case 1: 171 watermark = SF_W_MARK_SISO; 172 break; 173 case 2: 174 watermark = SF_W_MARK_MIMO2; 175 break; 176 default: 177 watermark = SF_W_MARK_MIMO3; 178 break; 179 } 180 } else { 181 watermark = SF_W_MARK_LEGACY; 182 } 183 /* default watermark value for unassociated mode. */ 184 } else { 185 watermark = SF_W_MARK_MIMO2; 186 } 187 sf_cmd->watermark[SF_FULL_ON] = cpu_to_le32(watermark); 188 189 for (i = 0; i < SF_NUM_SCENARIO; i++) { 190 for (j = 0; j < SF_NUM_TIMEOUT_TYPES; j++) { 191 sf_cmd->long_delay_timeouts[i][j] = 192 cpu_to_le32(SF_LONG_DELAY_AGING_TIMER); 193 } 194 } 195 196 if (sta || IWL_UCODE_API(mvm->fw->ucode_ver) < 13) { 197 BUILD_BUG_ON(sizeof(sf_full_timeout) != 198 sizeof(__le32) * SF_NUM_SCENARIO * 199 SF_NUM_TIMEOUT_TYPES); 200 201 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout, 202 sizeof(sf_full_timeout)); 203 } else { 204 BUILD_BUG_ON(sizeof(sf_full_timeout_def) != 205 sizeof(__le32) * SF_NUM_SCENARIO * 206 SF_NUM_TIMEOUT_TYPES); 207 208 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout_def, 209 sizeof(sf_full_timeout_def)); 210 } 211 212} 213 214static int iwl_mvm_sf_config(struct iwl_mvm *mvm, u8 sta_id, 215 enum iwl_sf_state new_state) 216{ 217 struct iwl_sf_cfg_cmd sf_cmd = { 218 .state = cpu_to_le32(SF_FULL_ON), 219 }; 220 struct ieee80211_sta *sta; 221 int ret = 0; 222 223 if (IWL_UCODE_API(mvm->fw->ucode_ver) < 13) 224 sf_cmd.state = cpu_to_le32(new_state); 225 226 if (mvm->cfg->disable_dummy_notification) 227 sf_cmd.state |= cpu_to_le32(SF_CFG_DUMMY_NOTIF_OFF); 228 229 /* 230 * If an associated AP sta changed its antenna configuration, the state 231 * will remain FULL_ON but SF parameters need to be reconsidered. 232 */ 233 if (new_state != SF_FULL_ON && mvm->sf_state == new_state) 234 return 0; 235 236 switch (new_state) { 237 case SF_UNINIT: 238 if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 13) 239 iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL); 240 break; 241 case SF_FULL_ON: 242 if (sta_id == IWL_MVM_STATION_COUNT) { 243 IWL_ERR(mvm, 244 "No station: Cannot switch SF to FULL_ON\n"); 245 return -EINVAL; 246 } 247 rcu_read_lock(); 248 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 249 if (IS_ERR_OR_NULL(sta)) { 250 IWL_ERR(mvm, "Invalid station id\n"); 251 rcu_read_unlock(); 252 return -EINVAL; 253 } 254 iwl_mvm_fill_sf_command(mvm, &sf_cmd, sta); 255 rcu_read_unlock(); 256 break; 257 case SF_INIT_OFF: 258 iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL); 259 break; 260 default: 261 WARN_ONCE(1, "Invalid state: %d. not sending Smart Fifo cmd\n", 262 new_state); 263 return -EINVAL; 264 } 265 266 ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_SF_CFG_CMD, CMD_ASYNC, 267 sizeof(sf_cmd), &sf_cmd); 268 if (!ret) 269 mvm->sf_state = new_state; 270 271 return ret; 272} 273 274/* 275 * Update Smart fifo: 276 * Count bound interfaces that are not to be removed, ignoring p2p devices, 277 * and set new state accordingly. 278 */ 279int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *changed_vif, 280 bool remove_vif) 281{ 282 enum iwl_sf_state new_state; 283 u8 sta_id = IWL_MVM_STATION_COUNT; 284 struct iwl_mvm_vif *mvmvif = NULL; 285 struct iwl_mvm_active_iface_iterator_data data = { 286 .ignore_vif = changed_vif, 287 .sta_vif_state = SF_UNINIT, 288 .sta_vif_ap_sta_id = IWL_MVM_STATION_COUNT, 289 }; 290 291 /* 292 * Ignore the call if we are in HW Restart flow, or if the handled 293 * vif is a p2p device. 294 */ 295 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 296 (changed_vif && changed_vif->type == NL80211_IFTYPE_P2P_DEVICE)) 297 return 0; 298 299 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 300 IEEE80211_IFACE_ITER_NORMAL, 301 iwl_mvm_bound_iface_iterator, 302 &data); 303 304 /* If changed_vif exists and is not to be removed, add to the count */ 305 if (changed_vif && !remove_vif) 306 data.num_active_macs++; 307 308 switch (data.num_active_macs) { 309 case 0: 310 /* If there are no active macs - change state to SF_INIT_OFF */ 311 new_state = SF_INIT_OFF; 312 break; 313 case 1: 314 if (remove_vif) { 315 /* The one active mac left is of type station 316 * and we filled the relevant data during iteration 317 */ 318 new_state = data.sta_vif_state; 319 sta_id = data.sta_vif_ap_sta_id; 320 } else { 321 if (WARN_ON(!changed_vif)) 322 return -EINVAL; 323 if (changed_vif->type != NL80211_IFTYPE_STATION) { 324 new_state = SF_UNINIT; 325 } else if (changed_vif->bss_conf.assoc && 326 changed_vif->bss_conf.dtim_period) { 327 mvmvif = iwl_mvm_vif_from_mac80211(changed_vif); 328 sta_id = mvmvif->ap_sta_id; 329 new_state = SF_FULL_ON; 330 } else { 331 new_state = SF_INIT_OFF; 332 } 333 } 334 break; 335 default: 336 /* If there are multiple active macs - change to SF_UNINIT */ 337 new_state = SF_UNINIT; 338 } 339 return iwl_mvm_sf_config(mvm, sta_id, new_state); 340} 341