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 SF_FULL_ON state. 103 */ 104static const __le32 sf_full_timeout[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = { 105 { 106 cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER), 107 cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER) 108 }, 109 { 110 cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER), 111 cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER) 112 }, 113 { 114 cpu_to_le32(SF_MCAST_AGING_TIMER), 115 cpu_to_le32(SF_MCAST_IDLE_TIMER) 116 }, 117 { 118 cpu_to_le32(SF_BA_AGING_TIMER), 119 cpu_to_le32(SF_BA_IDLE_TIMER) 120 }, 121 { 122 cpu_to_le32(SF_TX_RE_AGING_TIMER), 123 cpu_to_le32(SF_TX_RE_IDLE_TIMER) 124 }, 125}; 126 127static void iwl_mvm_fill_sf_command(struct iwl_sf_cfg_cmd *sf_cmd, 128 struct ieee80211_sta *sta) 129{ 130 int i, j, watermark; 131 132 sf_cmd->watermark[SF_LONG_DELAY_ON] = cpu_to_le32(SF_W_MARK_SCAN); 133 134 /* 135 * If we are in association flow - check antenna configuration 136 * capabilities of the AP station, and choose the watermark accordingly. 137 */ 138 if (sta) { 139 if (sta->ht_cap.ht_supported || sta->vht_cap.vht_supported) { 140 switch (sta->rx_nss) { 141 case 1: 142 watermark = SF_W_MARK_SISO; 143 break; 144 case 2: 145 watermark = SF_W_MARK_MIMO2; 146 break; 147 default: 148 watermark = SF_W_MARK_MIMO3; 149 break; 150 } 151 } else { 152 watermark = SF_W_MARK_LEGACY; 153 } 154 /* default watermark value for unassociated mode. */ 155 } else { 156 watermark = SF_W_MARK_MIMO2; 157 } 158 sf_cmd->watermark[SF_FULL_ON] = cpu_to_le32(watermark); 159 160 for (i = 0; i < SF_NUM_SCENARIO; i++) { 161 for (j = 0; j < SF_NUM_TIMEOUT_TYPES; j++) { 162 sf_cmd->long_delay_timeouts[i][j] = 163 cpu_to_le32(SF_LONG_DELAY_AGING_TIMER); 164 } 165 } 166 BUILD_BUG_ON(sizeof(sf_full_timeout) != 167 sizeof(__le32) * SF_NUM_SCENARIO * SF_NUM_TIMEOUT_TYPES); 168 169 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout, 170 sizeof(sf_full_timeout)); 171} 172 173static int iwl_mvm_sf_config(struct iwl_mvm *mvm, u8 sta_id, 174 enum iwl_sf_state new_state) 175{ 176 struct iwl_sf_cfg_cmd sf_cmd = { 177 .state = cpu_to_le32(new_state), 178 }; 179 struct ieee80211_sta *sta; 180 int ret = 0; 181 182 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_SF_NO_DUMMY_NOTIF && 183 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 break; 196 case SF_FULL_ON: 197 if (sta_id == IWL_MVM_STATION_COUNT) { 198 IWL_ERR(mvm, 199 "No station: Cannot switch SF to FULL_ON\n"); 200 return -EINVAL; 201 } 202 rcu_read_lock(); 203 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); 204 if (IS_ERR_OR_NULL(sta)) { 205 IWL_ERR(mvm, "Invalid station id\n"); 206 rcu_read_unlock(); 207 return -EINVAL; 208 } 209 iwl_mvm_fill_sf_command(&sf_cmd, sta); 210 rcu_read_unlock(); 211 break; 212 case SF_INIT_OFF: 213 iwl_mvm_fill_sf_command(&sf_cmd, NULL); 214 break; 215 default: 216 WARN_ONCE(1, "Invalid state: %d. not sending Smart Fifo cmd\n", 217 new_state); 218 return -EINVAL; 219 } 220 221 ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_SF_CFG_CMD, CMD_ASYNC, 222 sizeof(sf_cmd), &sf_cmd); 223 if (!ret) 224 mvm->sf_state = new_state; 225 226 return ret; 227} 228 229/* 230 * Update Smart fifo: 231 * Count bound interfaces that are not to be removed, ignoring p2p devices, 232 * and set new state accordingly. 233 */ 234int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *changed_vif, 235 bool remove_vif) 236{ 237 enum iwl_sf_state new_state; 238 u8 sta_id = IWL_MVM_STATION_COUNT; 239 struct iwl_mvm_vif *mvmvif = NULL; 240 struct iwl_mvm_active_iface_iterator_data data = { 241 .ignore_vif = changed_vif, 242 .sta_vif_state = SF_UNINIT, 243 .sta_vif_ap_sta_id = IWL_MVM_STATION_COUNT, 244 }; 245 246 /* 247 * Ignore the call if we are in HW Restart flow, or if the handled 248 * vif is a p2p device. 249 */ 250 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) || 251 (changed_vif && changed_vif->type == NL80211_IFTYPE_P2P_DEVICE)) 252 return 0; 253 254 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 255 IEEE80211_IFACE_ITER_NORMAL, 256 iwl_mvm_bound_iface_iterator, 257 &data); 258 259 /* If changed_vif exists and is not to be removed, add to the count */ 260 if (changed_vif && !remove_vif) 261 data.num_active_macs++; 262 263 switch (data.num_active_macs) { 264 case 0: 265 /* If there are no active macs - change state to SF_INIT_OFF */ 266 new_state = SF_INIT_OFF; 267 break; 268 case 1: 269 if (remove_vif) { 270 /* The one active mac left is of type station 271 * and we filled the relevant data during iteration 272 */ 273 new_state = data.sta_vif_state; 274 sta_id = data.sta_vif_ap_sta_id; 275 } else { 276 if (WARN_ON(!changed_vif)) 277 return -EINVAL; 278 if (changed_vif->type != NL80211_IFTYPE_STATION) { 279 new_state = SF_UNINIT; 280 } else if (changed_vif->bss_conf.assoc && 281 changed_vif->bss_conf.dtim_period) { 282 mvmvif = iwl_mvm_vif_from_mac80211(changed_vif); 283 sta_id = mvmvif->ap_sta_id; 284 new_state = SF_FULL_ON; 285 } else { 286 new_state = SF_INIT_OFF; 287 } 288 } 289 break; 290 default: 291 /* If there are multiple active macs - change to SF_UNINIT */ 292 new_state = SF_UNINIT; 293 } 294 return iwl_mvm_sf_config(mvm, sta_id, new_state); 295} 296