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

   1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
   2 /*
   3  * Copyright (C) 2013-2014, 2018-2019, 2022-2024 Intel Corporation
   4  * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
   5  */
   6 #include "mvm.h"
   7
   8 /* For counting bound interfaces */
   9 struct iwl_mvm_active_iface_iterator_data {
  10         struct ieee80211_vif *ignore_vif;
  11         struct ieee80211_sta *sta_vif_ap_sta;
  12         enum iwl_sf_state sta_vif_state;
  13         u32 num_active_macs;
  14 };
  15
  16 /*
  17  * Count bound interfaces which are not p2p, besides data->ignore_vif.
  18  * data->station_vif will point to one bound vif of type station, if exists.
  19  */
  20 static void iwl_mvm_bound_iface_iterator(void *_data, u8 *mac,
  21                                          struct ieee80211_vif *vif)
  22 {
  23         struct iwl_mvm_active_iface_iterator_data *data = _data;
  24         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  25
  26         if (vif == data->ignore_vif || !mvmvif->deflink.phy_ctxt ||
  27             vif->type == NL80211_IFTYPE_P2P_DEVICE)
  28                 return;
  29
  30         data->num_active_macs++;
  31
  32         if (vif->type == NL80211_IFTYPE_STATION) {
  33                 data->sta_vif_ap_sta = mvmvif->ap_sta;
  34                 if (vif->cfg.assoc)
  35                         data->sta_vif_state = SF_FULL_ON;
  36                 else
  37                         data->sta_vif_state = SF_INIT_OFF;
  38         }
  39 }
  40
  41 /*
  42  * Aging and idle timeouts for the different possible scenarios
  43  * in default configuration
  44  */
  45 static const
  46 __le32 sf_full_timeout_def[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = {
  47         {
  48                 cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER_DEF),
  49                 cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER_DEF)
  50         },
  51         {
  52                 cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER_DEF),
  53                 cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER_DEF)
  54         },
  55         {
  56                 cpu_to_le32(SF_MCAST_AGING_TIMER_DEF),
  57                 cpu_to_le32(SF_MCAST_IDLE_TIMER_DEF)
  58         },
  59         {
  60                 cpu_to_le32(SF_BA_AGING_TIMER_DEF),
  61                 cpu_to_le32(SF_BA_IDLE_TIMER_DEF)
  62         },
  63         {
  64                 cpu_to_le32(SF_TX_RE_AGING_TIMER_DEF),
  65                 cpu_to_le32(SF_TX_RE_IDLE_TIMER_DEF)
  66         },
  67 };
  68
  69 /*
  70  * Aging and idle timeouts for the different possible scenarios
  71  * in single BSS MAC configuration.
  72  */
  73 static const __le32 sf_full_timeout[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = {
  74         {
  75                 cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER),
  76                 cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER)
  77         },
  78         {
  79                 cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER),
  80                 cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER)
  81         },
  82         {
  83                 cpu_to_le32(SF_MCAST_AGING_TIMER),
  84                 cpu_to_le32(SF_MCAST_IDLE_TIMER)
  85         },
  86         {
  87                 cpu_to_le32(SF_BA_AGING_TIMER),
  88                 cpu_to_le32(SF_BA_IDLE_TIMER)
  89         },
  90         {
  91                 cpu_to_le32(SF_TX_RE_AGING_TIMER),
  92                 cpu_to_le32(SF_TX_RE_IDLE_TIMER)
  93         },
  94 };
  95
  96 static void iwl_mvm_fill_sf_command(struct iwl_mvm *mvm,
  97                                     struct iwl_sf_cfg_cmd *sf_cmd,
  98                                     struct ieee80211_sta *sta)
  99 {
 100         int i, j, watermark;
 101         u8 max_rx_nss = 0;
 102         bool is_legacy = true;
 103         struct ieee80211_link_sta *link_sta;
 104         unsigned int link_id;
 105
 106         sf_cmd->watermark[SF_LONG_DELAY_ON] = cpu_to_le32(SF_W_MARK_SCAN);
 107
 108         /*
 109          * If we are in association flow - check antenna configuration
 110          * capabilities of the AP station, and choose the watermark accordingly.
 111          */
 112         if (sta) {
 113                 /* find the maximal NSS number among all links (if relevant) */
 114                 rcu_read_lock();
 115                 for (link_id = 0; link_id < ARRAY_SIZE(sta->link); link_id++) {
 116                         link_sta = rcu_dereference(sta->link[link_id]);
 117                         if (!link_sta)
 118                                 continue;
 119
 120                         if (link_sta->ht_cap.ht_supported ||
 121                             link_sta->vht_cap.vht_supported ||
 122                             link_sta->eht_cap.has_eht ||
 123                             link_sta->he_cap.has_he) {
 124                                 is_legacy = false;
 125                                 max_rx_nss = max(max_rx_nss, link_sta->rx_nss);
 126                         }
 127                 }
 128                 rcu_read_unlock();
 129
 130                 if (!is_legacy) {
 131                         switch (max_rx_nss) {
 132                         case 1:
 133                                 watermark = SF_W_MARK_SISO;
 134                                 break;
 135                         case 2:
 136                                 watermark = SF_W_MARK_MIMO2;
 137                                 break;
 138                         default:
 139                                 watermark = SF_W_MARK_MIMO3;
 140                                 break;
 141                         }
 142                 } else {
 143                         watermark = SF_W_MARK_LEGACY;
 144                 }
 145         /* default watermark value for unassociated mode. */
 146         } else {
 147                 watermark = SF_W_MARK_MIMO2;
 148         }
 149         sf_cmd->watermark[SF_FULL_ON] = cpu_to_le32(watermark);
 150
 151         for (i = 0; i < SF_NUM_SCENARIO; i++) {
 152                 for (j = 0; j < SF_NUM_TIMEOUT_TYPES; j++) {
 153                         sf_cmd->long_delay_timeouts[i][j] =
 154                                         cpu_to_le32(SF_LONG_DELAY_AGING_TIMER);
 155                 }
 156         }
 157
 158         if (sta) {
 159                 BUILD_BUG_ON(sizeof(sf_full_timeout) !=
 160                              sizeof(__le32) * SF_NUM_SCENARIO *
 161                              SF_NUM_TIMEOUT_TYPES);
 162
 163                 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout,
 164                        sizeof(sf_full_timeout));
 165         } else {
 166                 BUILD_BUG_ON(sizeof(sf_full_timeout_def) !=
 167                              sizeof(__le32) * SF_NUM_SCENARIO *
 168                              SF_NUM_TIMEOUT_TYPES);
 169
 170                 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout_def,
 171                        sizeof(sf_full_timeout_def));
 172         }
 173 }
 174
 175 static int iwl_mvm_sf_config(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 176                              enum iwl_sf_state new_state)
 177 {
 178         struct iwl_sf_cfg_cmd sf_cmd = {
 179                 .state = cpu_to_le32(new_state),
 180         };
 181         int ret = 0;
 182
 183         /*
 184          * If an associated AP sta changed its antenna configuration, the state
 185          * will remain FULL_ON but SF parameters need to be reconsidered.
 186          */
 187         if (new_state != SF_FULL_ON && mvm->sf_state == new_state)
 188                 return 0;
 189
 190         switch (new_state) {
 191         case SF_UNINIT:
 192                 iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
 193                 break;
 194         case SF_FULL_ON:
 195                 if (!sta) {
 196                         IWL_ERR(mvm,
 197                                 "No station: Cannot switch SF to FULL_ON\n");
 198                         return -EINVAL;
 199                 }
 200                 iwl_mvm_fill_sf_command(mvm, &sf_cmd, sta);
 201                 break;
 202         case SF_INIT_OFF:
 203                 iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
 204                 break;
 205         default:
 206                 WARN_ONCE(1, "Invalid state: %d. not sending Smart Fifo cmd\n",
 207                           new_state);
 208                 return -EINVAL;
 209         }
 210
 211         ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_SF_CFG_CMD, CMD_ASYNC,
 212                                    sizeof(sf_cmd), &sf_cmd);
 213         if (!ret)
 214                 mvm->sf_state = new_state;
 215
 216         return ret;
 217 }
 218
 219 /*
 220  * Update Smart fifo:
 221  * Count bound interfaces that are not to be removed, ignoring p2p devices,
 222  * and set new state accordingly.
 223  */
 224 int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *changed_vif,
 225                       bool remove_vif)
 226 {
 227         enum iwl_sf_state new_state;
 228         struct iwl_mvm_vif *mvmvif = NULL;
 229         struct iwl_mvm_active_iface_iterator_data data = {
 230                 .ignore_vif = changed_vif,
 231                 .sta_vif_state = SF_UNINIT,
 232         };
 233         struct ieee80211_sta *sta = NULL;
 234
 235         if (fw_has_api(&mvm->fw->ucode_capa,
 236                        IWL_UCODE_TLV_API_SMART_FIFO_OFFLOAD))
 237                 return 0;
 238         /*
 239          * Ignore the call if we are in HW Restart flow, or if the handled
 240          * vif is a p2p device.
 241          */
 242         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
 243             (changed_vif && changed_vif->type == NL80211_IFTYPE_P2P_DEVICE))
 244                 return 0;
 245
 246         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
 247                                                    IEEE80211_IFACE_ITER_NORMAL,
 248                                                    iwl_mvm_bound_iface_iterator,
 249                                                    &data);
 250
 251         /* If changed_vif exists and is not to be removed, add to the count */
 252         if (changed_vif && !remove_vif)
 253                 data.num_active_macs++;
 254
 255         switch (data.num_active_macs) {
 256         case 0:
 257                 /* If there are no active macs - change state to SF_INIT_OFF */
 258                 new_state = SF_INIT_OFF;
 259                 break;
 260         case 1:
 261                 if (remove_vif) {
 262                         /* The one active mac left is of type station
 263                          * and we filled the relevant data during iteration
 264                          */
 265                         new_state = data.sta_vif_state;
 266                         sta = data.sta_vif_ap_sta;
 267                 } else {
 268                         if (WARN_ON(!changed_vif))
 269                                 return -EINVAL;
 270                         if (changed_vif->type != NL80211_IFTYPE_STATION) {
 271                                 new_state = SF_UNINIT;
 272                         } else if (changed_vif->cfg.assoc &&
 273                                    changed_vif->bss_conf.dtim_period) {
 274                                 mvmvif = iwl_mvm_vif_from_mac80211(changed_vif);
 275                                 sta = mvmvif->ap_sta;
 276                                 new_state = SF_FULL_ON;
 277                         } else {
 278                                 new_state = SF_INIT_OFF;
 279                         }
 280                 }
 281                 break;
 282         default:
 283                 /* If there are multiple active macs - change to SF_UNINIT */
 284                 new_state = SF_UNINIT;
 285         }
 286
 287         return iwl_mvm_sf_config(mvm, sta, new_state);
 288 }