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 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         u8 sta_vif_ap_sta_id;
  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->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_id = mvmvif->ap_sta_id;
  34                 if (vif->bss_conf.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
 102         sf_cmd->watermark[SF_LONG_DELAY_ON] = cpu_to_le32(SF_W_MARK_SCAN);
 103
 104         /*
 105          * If we are in association flow - check antenna configuration
 106          * capabilities of the AP station, and choose the watermark accordingly.
 107          */
 108         if (sta) {
 109                 if (sta->ht_cap.ht_supported ||
 110                     sta->vht_cap.vht_supported ||
 111                     sta->he_cap.has_he) {
 112                         switch (sta->rx_nss) {
 113                         case 1:
 114                                 watermark = SF_W_MARK_SISO;
 115                                 break;
 116                         case 2:
 117                                 watermark = SF_W_MARK_MIMO2;
 118                                 break;
 119                         default:
 120                                 watermark = SF_W_MARK_MIMO3;
 121                                 break;
 122                         }
 123                 } else {
 124                         watermark = SF_W_MARK_LEGACY;
 125                 }
 126         /* default watermark value for unassociated mode. */
 127         } else {
 128                 watermark = SF_W_MARK_MIMO2;
 129         }
 130         sf_cmd->watermark[SF_FULL_ON] = cpu_to_le32(watermark);
 131
 132         for (i = 0; i < SF_NUM_SCENARIO; i++) {
 133                 for (j = 0; j < SF_NUM_TIMEOUT_TYPES; j++) {
 134                         sf_cmd->long_delay_timeouts[i][j] =
 135                                         cpu_to_le32(SF_LONG_DELAY_AGING_TIMER);
 136                 }
 137         }
 138
 139         if (sta) {
 140                 BUILD_BUG_ON(sizeof(sf_full_timeout) !=
 141                              sizeof(__le32) * SF_NUM_SCENARIO *
 142                              SF_NUM_TIMEOUT_TYPES);
 143
 144                 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout,
 145                        sizeof(sf_full_timeout));
 146         } else {
 147                 BUILD_BUG_ON(sizeof(sf_full_timeout_def) !=
 148                              sizeof(__le32) * SF_NUM_SCENARIO *
 149                              SF_NUM_TIMEOUT_TYPES);
 150
 151                 memcpy(sf_cmd->full_on_timeouts, sf_full_timeout_def,
 152                        sizeof(sf_full_timeout_def));
 153         }
 154
 155 }
 156
 157 static int iwl_mvm_sf_config(struct iwl_mvm *mvm, u8 sta_id,
 158                              enum iwl_sf_state new_state)
 159 {
 160         struct iwl_sf_cfg_cmd sf_cmd = {
 161                 .state = cpu_to_le32(new_state),
 162         };
 163         struct ieee80211_sta *sta;
 164         int ret = 0;
 165
 166         if (mvm->cfg->disable_dummy_notification)
 167                 sf_cmd.state |= cpu_to_le32(SF_CFG_DUMMY_NOTIF_OFF);
 168
 169         /*
 170          * If an associated AP sta changed its antenna configuration, the state
 171          * will remain FULL_ON but SF parameters need to be reconsidered.
 172          */
 173         if (new_state != SF_FULL_ON && mvm->sf_state == new_state)
 174                 return 0;
 175
 176         switch (new_state) {
 177         case SF_UNINIT:
 178                 iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
 179                 break;
 180         case SF_FULL_ON:
 181                 if (sta_id == IWL_MVM_INVALID_STA) {
 182                         IWL_ERR(mvm,
 183                                 "No station: Cannot switch SF to FULL_ON\n");
 184                         return -EINVAL;
 185                 }
 186                 rcu_read_lock();
 187                 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
 188                 if (IS_ERR_OR_NULL(sta)) {
 189                         IWL_ERR(mvm, "Invalid station id\n");
 190                         rcu_read_unlock();
 191                         return -EINVAL;
 192                 }
 193                 iwl_mvm_fill_sf_command(mvm, &sf_cmd, sta);
 194                 rcu_read_unlock();
 195                 break;
 196         case SF_INIT_OFF:
 197                 iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
 198                 break;
 199         default:
 200                 WARN_ONCE(1, "Invalid state: %d. not sending Smart Fifo cmd\n",
 201                           new_state);
 202                 return -EINVAL;
 203         }
 204
 205         ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_SF_CFG_CMD, CMD_ASYNC,
 206                                    sizeof(sf_cmd), &sf_cmd);
 207         if (!ret)
 208                 mvm->sf_state = new_state;
 209
 210         return ret;
 211 }
 212
 213 /*
 214  * Update Smart fifo:
 215  * Count bound interfaces that are not to be removed, ignoring p2p devices,
 216  * and set new state accordingly.
 217  */
 218 int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *changed_vif,
 219                       bool remove_vif)
 220 {
 221         enum iwl_sf_state new_state;
 222         u8 sta_id = IWL_MVM_INVALID_STA;
 223         struct iwl_mvm_vif *mvmvif = NULL;
 224         struct iwl_mvm_active_iface_iterator_data data = {
 225                 .ignore_vif = changed_vif,
 226                 .sta_vif_state = SF_UNINIT,
 227                 .sta_vif_ap_sta_id = IWL_MVM_INVALID_STA,
 228         };
 229
 230         /*
 231          * Ignore the call if we are in HW Restart flow, or if the handled
 232          * vif is a p2p device.
 233          */
 234         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
 235             (changed_vif && changed_vif->type == NL80211_IFTYPE_P2P_DEVICE))
 236                 return 0;
 237
 238         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
 239                                                    IEEE80211_IFACE_ITER_NORMAL,
 240                                                    iwl_mvm_bound_iface_iterator,
 241                                                    &data);
 242
 243         /* If changed_vif exists and is not to be removed, add to the count */
 244         if (changed_vif && !remove_vif)
 245                 data.num_active_macs++;
 246
 247         switch (data.num_active_macs) {
 248         case 0:
 249                 /* If there are no active macs - change state to SF_INIT_OFF */
 250                 new_state = SF_INIT_OFF;
 251                 break;
 252         case 1:
 253                 if (remove_vif) {
 254                         /* The one active mac left is of type station
 255                          * and we filled the relevant data during iteration
 256                          */
 257                         new_state = data.sta_vif_state;
 258                         sta_id = data.sta_vif_ap_sta_id;
 259                 } else {
 260                         if (WARN_ON(!changed_vif))
 261                                 return -EINVAL;
 262                         if (changed_vif->type != NL80211_IFTYPE_STATION) {
 263                                 new_state = SF_UNINIT;
 264                         } else if (changed_vif->bss_conf.assoc &&
 265                                    changed_vif->bss_conf.dtim_period) {
 266                                 mvmvif = iwl_mvm_vif_from_mac80211(changed_vif);
 267                                 sta_id = mvmvif->ap_sta_id;
 268                                 new_state = SF_FULL_ON;
 269                         } else {
 270                                 new_state = SF_INIT_OFF;
 271                         }
 272                 }
 273                 break;
 274         default:
 275                 /* If there are multiple active macs - change to SF_UNINIT */
 276                 new_state = SF_UNINIT;
 277         }
 278         return iwl_mvm_sf_config(mvm, sta_id, new_state);
 279 }