iwlwifi/mvm/sf.c

0001 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
0002 /*
0003  * Copyright (C) 2013-2014, 2018-2019, 2022 Intel Corporation
0004  * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
0005  */
0006 #include "mvm.h"
0007
0008 /* For counting bound interfaces */
0009 struct iwl_mvm_active_iface_iterator_data {
0010     struct ieee80211_vif *ignore_vif;
0011     u8 sta_vif_ap_sta_id;
0012     enum iwl_sf_state sta_vif_state;
0013     u32 num_active_macs;
0014 };
0015
0016 /*
0017  * Count bound interfaces which are not p2p, besides data->ignore_vif.
0018  * data->station_vif will point to one bound vif of type station, if exists.
0019  */
0020 static void iwl_mvm_bound_iface_iterator(void *_data, u8 *mac,
0021                      struct ieee80211_vif *vif)
0022 {
0023     struct iwl_mvm_active_iface_iterator_data *data = _data;
0024     struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
0025
0026     if (vif == data->ignore_vif || !mvmvif->phy_ctxt ||
0027         vif->type == NL80211_IFTYPE_P2P_DEVICE)
0028         return;
0029
0030     data->num_active_macs++;
0031
0032     if (vif->type == NL80211_IFTYPE_STATION) {
0033         data->sta_vif_ap_sta_id = mvmvif->ap_sta_id;
0034         if (vif->cfg.assoc)
0035             data->sta_vif_state = SF_FULL_ON;
0036         else
0037             data->sta_vif_state = SF_INIT_OFF;
0038     }
0039 }
0040
0041 /*
0042  * Aging and idle timeouts for the different possible scenarios
0043  * in default configuration
0044  */
0045 static const
0046 __le32 sf_full_timeout_def[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = {
0047     {
0048         cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER_DEF),
0049         cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER_DEF)
0050     },
0051     {
0052         cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER_DEF),
0053         cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER_DEF)
0054     },
0055     {
0056         cpu_to_le32(SF_MCAST_AGING_TIMER_DEF),
0057         cpu_to_le32(SF_MCAST_IDLE_TIMER_DEF)
0058     },
0059     {
0060         cpu_to_le32(SF_BA_AGING_TIMER_DEF),
0061         cpu_to_le32(SF_BA_IDLE_TIMER_DEF)
0062     },
0063     {
0064         cpu_to_le32(SF_TX_RE_AGING_TIMER_DEF),
0065         cpu_to_le32(SF_TX_RE_IDLE_TIMER_DEF)
0066     },
0067 };
0068
0069 /*
0070  * Aging and idle timeouts for the different possible scenarios
0071  * in single BSS MAC configuration.
0072  */
0073 static const __le32 sf_full_timeout[SF_NUM_SCENARIO][SF_NUM_TIMEOUT_TYPES] = {
0074     {
0075         cpu_to_le32(SF_SINGLE_UNICAST_AGING_TIMER),
0076         cpu_to_le32(SF_SINGLE_UNICAST_IDLE_TIMER)
0077     },
0078     {
0079         cpu_to_le32(SF_AGG_UNICAST_AGING_TIMER),
0080         cpu_to_le32(SF_AGG_UNICAST_IDLE_TIMER)
0081     },
0082     {
0083         cpu_to_le32(SF_MCAST_AGING_TIMER),
0084         cpu_to_le32(SF_MCAST_IDLE_TIMER)
0085     },
0086     {
0087         cpu_to_le32(SF_BA_AGING_TIMER),
0088         cpu_to_le32(SF_BA_IDLE_TIMER)
0089     },
0090     {
0091         cpu_to_le32(SF_TX_RE_AGING_TIMER),
0092         cpu_to_le32(SF_TX_RE_IDLE_TIMER)
0093     },
0094 };
0095
0096 static void iwl_mvm_fill_sf_command(struct iwl_mvm *mvm,
0097                     struct iwl_sf_cfg_cmd *sf_cmd,
0098                     struct ieee80211_sta *sta)
0099 {
0100     int i, j, watermark;
0101
0102     sf_cmd->watermark[SF_LONG_DELAY_ON] = cpu_to_le32(SF_W_MARK_SCAN);
0103
0104     /*
0105      * If we are in association flow - check antenna configuration
0106      * capabilities of the AP station, and choose the watermark accordingly.
0107      */
0108     if (sta) {
0109         if (sta->deflink.ht_cap.ht_supported ||
0110             sta->deflink.vht_cap.vht_supported ||
0111             sta->deflink.he_cap.has_he) {
0112             switch (sta->deflink.rx_nss) {
0113             case 1:
0114                 watermark = SF_W_MARK_SISO;
0115                 break;
0116             case 2:
0117                 watermark = SF_W_MARK_MIMO2;
0118                 break;
0119             default:
0120                 watermark = SF_W_MARK_MIMO3;
0121                 break;
0122             }
0123         } else {
0124             watermark = SF_W_MARK_LEGACY;
0125         }
0126     /* default watermark value for unassociated mode. */
0127     } else {
0128         watermark = SF_W_MARK_MIMO2;
0129     }
0130     sf_cmd->watermark[SF_FULL_ON] = cpu_to_le32(watermark);
0131
0132     for (i = 0; i < SF_NUM_SCENARIO; i++) {
0133         for (j = 0; j < SF_NUM_TIMEOUT_TYPES; j++) {
0134             sf_cmd->long_delay_timeouts[i][j] =
0135                     cpu_to_le32(SF_LONG_DELAY_AGING_TIMER);
0136         }
0137     }
0138
0139     if (sta) {
0140         BUILD_BUG_ON(sizeof(sf_full_timeout) !=
0141                  sizeof(__le32) * SF_NUM_SCENARIO *
0142                  SF_NUM_TIMEOUT_TYPES);
0143
0144         memcpy(sf_cmd->full_on_timeouts, sf_full_timeout,
0145                sizeof(sf_full_timeout));
0146     } else {
0147         BUILD_BUG_ON(sizeof(sf_full_timeout_def) !=
0148                  sizeof(__le32) * SF_NUM_SCENARIO *
0149                  SF_NUM_TIMEOUT_TYPES);
0150
0151         memcpy(sf_cmd->full_on_timeouts, sf_full_timeout_def,
0152                sizeof(sf_full_timeout_def));
0153     }
0154
0155 }
0156
0157 static int iwl_mvm_sf_config(struct iwl_mvm *mvm, u8 sta_id,
0158                  enum iwl_sf_state new_state)
0159 {
0160     struct iwl_sf_cfg_cmd sf_cmd = {
0161         .state = cpu_to_le32(new_state),
0162     };
0163     struct ieee80211_sta *sta;
0164     int ret = 0;
0165
0166     if (mvm->cfg->disable_dummy_notification)
0167         sf_cmd.state |= cpu_to_le32(SF_CFG_DUMMY_NOTIF_OFF);
0168
0169     /*
0170      * If an associated AP sta changed its antenna configuration, the state
0171      * will remain FULL_ON but SF parameters need to be reconsidered.
0172      */
0173     if (new_state != SF_FULL_ON && mvm->sf_state == new_state)
0174         return 0;
0175
0176     switch (new_state) {
0177     case SF_UNINIT:
0178         iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
0179         break;
0180     case SF_FULL_ON:
0181         if (sta_id == IWL_MVM_INVALID_STA) {
0182             IWL_ERR(mvm,
0183                 "No station: Cannot switch SF to FULL_ON\n");
0184             return -EINVAL;
0185         }
0186         rcu_read_lock();
0187         sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
0188         if (IS_ERR_OR_NULL(sta)) {
0189             IWL_ERR(mvm, "Invalid station id\n");
0190             rcu_read_unlock();
0191             return -EINVAL;
0192         }
0193         iwl_mvm_fill_sf_command(mvm, &sf_cmd, sta);
0194         rcu_read_unlock();
0195         break;
0196     case SF_INIT_OFF:
0197         iwl_mvm_fill_sf_command(mvm, &sf_cmd, NULL);
0198         break;
0199     default:
0200         WARN_ONCE(1, "Invalid state: %d. not sending Smart Fifo cmd\n",
0201               new_state);
0202         return -EINVAL;
0203     }
0204
0205     ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_SF_CFG_CMD, CMD_ASYNC,
0206                    sizeof(sf_cmd), &sf_cmd);
0207     if (!ret)
0208         mvm->sf_state = new_state;
0209
0210     return ret;
0211 }
0212
0213 /*
0214  * Update Smart fifo:
0215  * Count bound interfaces that are not to be removed, ignoring p2p devices,
0216  * and set new state accordingly.
0217  */
0218 int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *changed_vif,
0219               bool remove_vif)
0220 {
0221     enum iwl_sf_state new_state;
0222     u8 sta_id = IWL_MVM_INVALID_STA;
0223     struct iwl_mvm_vif *mvmvif = NULL;
0224     struct iwl_mvm_active_iface_iterator_data data = {
0225         .ignore_vif = changed_vif,
0226         .sta_vif_state = SF_UNINIT,
0227         .sta_vif_ap_sta_id = IWL_MVM_INVALID_STA,
0228     };
0229
0230     /*
0231      * Ignore the call if we are in HW Restart flow, or if the handled
0232      * vif is a p2p device.
0233      */
0234     if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) ||
0235         (changed_vif && changed_vif->type == NL80211_IFTYPE_P2P_DEVICE))
0236         return 0;
0237
0238     ieee80211_iterate_active_interfaces_atomic(mvm->hw,
0239                            IEEE80211_IFACE_ITER_NORMAL,
0240                            iwl_mvm_bound_iface_iterator,
0241                            &data);
0242
0243     /* If changed_vif exists and is not to be removed, add to the count */
0244     if (changed_vif && !remove_vif)
0245         data.num_active_macs++;
0246
0247     switch (data.num_active_macs) {
0248     case 0:
0249         /* If there are no active macs - change state to SF_INIT_OFF */
0250         new_state = SF_INIT_OFF;
0251         break;
0252     case 1:
0253         if (remove_vif) {
0254             /* The one active mac left is of type station
0255              * and we filled the relevant data during iteration
0256              */
0257             new_state = data.sta_vif_state;
0258             sta_id = data.sta_vif_ap_sta_id;
0259         } else {
0260             if (WARN_ON(!changed_vif))
0261                 return -EINVAL;
0262             if (changed_vif->type != NL80211_IFTYPE_STATION) {
0263                 new_state = SF_UNINIT;
0264             } else if (changed_vif->cfg.assoc &&
0265                    changed_vif->bss_conf.dtim_period) {
0266                 mvmvif = iwl_mvm_vif_from_mac80211(changed_vif);
0267                 sta_id = mvmvif->ap_sta_id;
0268                 new_state = SF_FULL_ON;
0269             } else {
0270                 new_state = SF_INIT_OFF;
0271             }
0272         }
0273         break;
0274     default:
0275         /* If there are multiple active macs - change to SF_UNINIT */
0276         new_state = SF_UNINIT;
0277     }
0278     return iwl_mvm_sf_config(mvm, sta_id, new_state);
0279 }