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) 2018-2019 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) 2018-2019 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 ||
 166                     sta->vht_cap.vht_supported ||
 167                     sta->he_cap.has_he) {
 168                         switch (sta->rx_nss) {
 169                         case 1:
 170                                 watermark = SF_W_MARK_SISO;
 171                                 break;
 172                         case 2:
 173                                 watermark = SF_W_MARK_MIMO2;
 174                                 break;
 175                         default:
 176                                 watermark = SF_W_MARK_MIMO3;
 177                                 break;
 178                         }
 179                 } else {
 180                         watermark = SF_W_MARK_LEGACY;
 181                 }
 182         /* default watermark value for unassociated mode. */
 183         } else {
 184                 watermark = SF_W_MARK_MIMO2;
 185         }
 186         sf_cmd->watermark[SF_FULL_ON] = cpu_to_le32(watermark);
 187
 188         for (i = 0; i < SF_NUM_SCENARIO; i++) {
 189                 for (j = 0; j < SF_NUM_TIMEOUT_TYPES; j++) {
 190                         sf_cmd->long_delay_timeouts[i][j] =
 191                                         cpu_to_le32(SF_LONG_DELAY_AGING_TIMER);
 192                 }
 193         }
 194
 195         if (sta) {
 196                 BUILD_BUG_ON(sizeof(sf_full_timeout) !=
 197                              sizeof(__le32) * SF_NUM_SCENARIO *
 198                              SF_NUM_TIMEOUT_TYPES);
 199
 200                 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout,
 201                        sizeof(sf_full_timeout));
 202         } else {
 203                 BUILD_BUG_ON(sizeof(sf_full_timeout_def) !=
 204                              sizeof(__le32) * SF_NUM_SCENARIO *
 205                              SF_NUM_TIMEOUT_TYPES);
 206
 207                 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout_def,
 208                        sizeof(sf_full_timeout_def));
 209         }
 210
 211 }
 212
 213 static int iwl_mvm_sf_config(struct iwl_mvm *mvm, u8 sta_id,
 214                              enum iwl_sf_state new_state)
 215 {
 216         struct iwl_sf_cfg_cmd sf_cmd = {
 217                 .state = cpu_to_le32(new_state),
 218         };
 219         struct ieee80211_sta *sta;
 220         int ret = 0;
 221
 222         if (mvm->cfg->disable_dummy_notification)
 223                 sf_cmd.state |= cpu_to_le32(SF_CFG_DUMMY_NOTIF_OFF);
 224
 225         /*
 226          * If an associated AP sta changed its antenna configuration, the state
 227          * will remain FULL_ON but SF parameters need to be reconsidered.
 228          */
 229         if (new_state != SF_FULL_ON && mvm->sf_state == new_state)
 230                 return 0;
 231
 232         switch (new_state) {
 233         case SF_UNINIT:
 234                 iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
 235                 break;
 236         case SF_FULL_ON:
 237                 if (sta_id == IWL_MVM_INVALID_STA) {
 238                         IWL_ERR(mvm,
 239                                 "No station: Cannot switch SF to FULL_ON\n");
 240                         return -EINVAL;
 241                 }
 242                 rcu_read_lock();
 243                 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
 244                 if (IS_ERR_OR_NULL(sta)) {
 245                         IWL_ERR(mvm, "Invalid station id\n");
 246                         rcu_read_unlock();
 247                         return -EINVAL;
 248                 }
 249                 iwl_mvm_fill_sf_command(mvm, &sf_cmd, sta);
 250                 rcu_read_unlock();
 251                 break;
 252         case SF_INIT_OFF:
 253                 iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
 254                 break;
 255         default:
 256                 WARN_ONCE(1, "Invalid state: %d. not sending Smart Fifo cmd\n",
 257                           new_state);
 258                 return -EINVAL;
 259         }
 260
 261         ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_SF_CFG_CMD, CMD_ASYNC,
 262                                    sizeof(sf_cmd), &sf_cmd);
 263         if (!ret)
 264                 mvm->sf_state = new_state;
 265
 266         return ret;
 267 }
 268
 269 /*
 270  * Update Smart fifo:
 271  * Count bound interfaces that are not to be removed, ignoring p2p devices,
 272  * and set new state accordingly.
 273  */
 274 int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *changed_vif,
 275                       bool remove_vif)
 276 {
 277         enum iwl_sf_state new_state;
 278         u8 sta_id = IWL_MVM_INVALID_STA;
 279         struct iwl_mvm_vif *mvmvif = NULL;
 280         struct iwl_mvm_active_iface_iterator_data data = {
 281                 .ignore_vif = changed_vif,
 282                 .sta_vif_state = SF_UNINIT,
 283                 .sta_vif_ap_sta_id = IWL_MVM_INVALID_STA,
 284         };
 285
 286         /*
 287          * Ignore the call if we are in HW Restart flow, or if the handled
 288          * vif is a p2p device.
 289          */
 290         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
 291             (changed_vif && changed_vif->type == NL80211_IFTYPE_P2P_DEVICE))
 292                 return 0;
 293
 294         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
 295                                                    IEEE80211_IFACE_ITER_NORMAL,
 296                                                    iwl_mvm_bound_iface_iterator,
 297                                                    &data);
 298
 299         /* If changed_vif exists and is not to be removed, add to the count */
 300         if (changed_vif && !remove_vif)
 301                 data.num_active_macs++;
 302
 303         switch (data.num_active_macs) {
 304         case 0:
 305                 /* If there are no active macs - change state to SF_INIT_OFF */
 306                 new_state = SF_INIT_OFF;
 307                 break;
 308         case 1:
 309                 if (remove_vif) {
 310                         /* The one active mac left is of type station
 311                          * and we filled the relevant data during iteration
 312                          */
 313                         new_state = data.sta_vif_state;
 314                         sta_id = data.sta_vif_ap_sta_id;
 315                 } else {
 316                         if (WARN_ON(!changed_vif))
 317                                 return -EINVAL;
 318                         if (changed_vif->type != NL80211_IFTYPE_STATION) {
 319                                 new_state = SF_UNINIT;
 320                         } else if (changed_vif->bss_conf.assoc &&
 321                                    changed_vif->bss_conf.dtim_period) {
 322                                 mvmvif = iwl_mvm_vif_from_mac80211(changed_vif);
 323                                 sta_id = mvmvif->ap_sta_id;
 324                                 new_state = SF_FULL_ON;
 325                         } else {
 326                                 new_state = SF_INIT_OFF;
 327                         }
 328                 }
 329                 break;
 330         default:
 331                 /* If there are multiple active macs - change to SF_UNINIT */
 332                 new_state = SF_UNINIT;
 333         }
 334         return iwl_mvm_sf_config(mvm, sta_id, new_state);
 335 }