drivers/net/wireless/intel/iwlwifi/mvm/sf.c

   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 }