1e705c121SKalle Valo /****************************************************************************** 2e705c121SKalle Valo * 3e705c121SKalle Valo * This file is provided under a dual BSD/GPLv2 license. When using or 4e705c121SKalle Valo * redistributing this file, you may do so under either license. 5e705c121SKalle Valo * 6e705c121SKalle Valo * GPL LICENSE SUMMARY 7e705c121SKalle Valo * 8e705c121SKalle Valo * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 9e705c121SKalle Valo * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 103edfb5f4SAvraham Stern * Copyright(c) 2017 Intel Deutschland GmbH 1119125cb0SAndrei Otcheretianski * Copyright(c) 2018 Intel Corporation 12e705c121SKalle Valo * 13e705c121SKalle Valo * This program is free software; you can redistribute it and/or modify 14e705c121SKalle Valo * it under the terms of version 2 of the GNU General Public License as 15e705c121SKalle Valo * published by the Free Software Foundation. 16e705c121SKalle Valo * 17e705c121SKalle Valo * This program is distributed in the hope that it will be useful, but 18e705c121SKalle Valo * WITHOUT ANY WARRANTY; without even the implied warranty of 19e705c121SKalle Valo * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 20e705c121SKalle Valo * General Public License for more details. 21e705c121SKalle Valo * 22e705c121SKalle Valo * The full GNU General Public License is included in this distribution 23e705c121SKalle Valo * in the file called COPYING. 24e705c121SKalle Valo * 25e705c121SKalle Valo * Contact Information: 26d01c5366SEmmanuel Grumbach * Intel Linux Wireless <linuxwifi@intel.com> 27e705c121SKalle Valo * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 28e705c121SKalle Valo * 29e705c121SKalle Valo * BSD LICENSE 30e705c121SKalle Valo * 31e705c121SKalle Valo * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 32e705c121SKalle Valo * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 333edfb5f4SAvraham Stern * Copyright(c) 2017 Intel Deutschland GmbH 3419125cb0SAndrei Otcheretianski * Copyright(c) 2018 Intel Corporation 35e705c121SKalle Valo * All rights reserved. 36e705c121SKalle Valo * 37e705c121SKalle Valo * Redistribution and use in source and binary forms, with or without 38e705c121SKalle Valo * modification, are permitted provided that the following conditions 39e705c121SKalle Valo * are met: 40e705c121SKalle Valo * 41e705c121SKalle Valo * * Redistributions of source code must retain the above copyright 42e705c121SKalle Valo * notice, this list of conditions and the following disclaimer. 43e705c121SKalle Valo * * Redistributions in binary form must reproduce the above copyright 44e705c121SKalle Valo * notice, this list of conditions and the following disclaimer in 45e705c121SKalle Valo * the documentation and/or other materials provided with the 46e705c121SKalle Valo * distribution. 47e705c121SKalle Valo * * Neither the name Intel Corporation nor the names of its 48e705c121SKalle Valo * contributors may be used to endorse or promote products derived 49e705c121SKalle Valo * from this software without specific prior written permission. 50e705c121SKalle Valo * 51e705c121SKalle Valo * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 52e705c121SKalle Valo * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 53e705c121SKalle Valo * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 54e705c121SKalle Valo * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 55e705c121SKalle Valo * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 56e705c121SKalle Valo * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 57e705c121SKalle Valo * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 58e705c121SKalle Valo * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 59e705c121SKalle Valo * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 60e705c121SKalle Valo * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 61e705c121SKalle Valo * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 62e705c121SKalle Valo * 63e705c121SKalle Valo *****************************************************************************/ 64e705c121SKalle Valo 65e705c121SKalle Valo #include <linux/jiffies.h> 66e705c121SKalle Valo #include <net/mac80211.h> 67e705c121SKalle Valo 689fca9d5cSJohannes Berg #include "fw/notif-wait.h" 69e705c121SKalle Valo #include "iwl-trans.h" 70e705c121SKalle Valo #include "fw-api.h" 71e705c121SKalle Valo #include "time-event.h" 72e705c121SKalle Valo #include "mvm.h" 73e705c121SKalle Valo #include "iwl-io.h" 74e705c121SKalle Valo #include "iwl-prph.h" 75e705c121SKalle Valo 76e705c121SKalle Valo /* 77e705c121SKalle Valo * For the high priority TE use a time event type that has similar priority to 78e705c121SKalle Valo * the FW's action scan priority. 79e705c121SKalle Valo */ 80e705c121SKalle Valo #define IWL_MVM_ROC_TE_TYPE_NORMAL TE_P2P_DEVICE_DISCOVERABLE 81e705c121SKalle Valo #define IWL_MVM_ROC_TE_TYPE_MGMT_TX TE_P2P_CLIENT_ASSOC 82e705c121SKalle Valo 83e705c121SKalle Valo void iwl_mvm_te_clear_data(struct iwl_mvm *mvm, 84e705c121SKalle Valo struct iwl_mvm_time_event_data *te_data) 85e705c121SKalle Valo { 86e705c121SKalle Valo lockdep_assert_held(&mvm->time_event_lock); 87e705c121SKalle Valo 88e705c121SKalle Valo if (!te_data->vif) 89e705c121SKalle Valo return; 90e705c121SKalle Valo 91e705c121SKalle Valo list_del(&te_data->list); 92e705c121SKalle Valo te_data->running = false; 93e705c121SKalle Valo te_data->uid = 0; 94e705c121SKalle Valo te_data->id = TE_MAX; 95e705c121SKalle Valo te_data->vif = NULL; 96e705c121SKalle Valo } 97e705c121SKalle Valo 98e705c121SKalle Valo void iwl_mvm_roc_done_wk(struct work_struct *wk) 99e705c121SKalle Valo { 100e705c121SKalle Valo struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, roc_done_wk); 101e705c121SKalle Valo 102e705c121SKalle Valo /* 103e705c121SKalle Valo * Clear the ROC_RUNNING /ROC_AUX_RUNNING status bit. 104e705c121SKalle Valo * This will cause the TX path to drop offchannel transmissions. 105e705c121SKalle Valo * That would also be done by mac80211, but it is racy, in particular 106e705c121SKalle Valo * in the case that the time event actually completed in the firmware 107e705c121SKalle Valo * (which is handled in iwl_mvm_te_handle_notif). 108e705c121SKalle Valo */ 109d4e4aa7cSEmmanuel Grumbach if (test_and_clear_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status)) 110e705c121SKalle Valo iwl_mvm_unref(mvm, IWL_MVM_REF_ROC); 111d4e4aa7cSEmmanuel Grumbach if (test_and_clear_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status)) 112e705c121SKalle Valo iwl_mvm_unref(mvm, IWL_MVM_REF_ROC_AUX); 113e705c121SKalle Valo 114e705c121SKalle Valo synchronize_net(); 115e705c121SKalle Valo 116e705c121SKalle Valo /* 117e705c121SKalle Valo * Flush the offchannel queue -- this is called when the time 118e705c121SKalle Valo * event finishes or is canceled, so that frames queued for it 119e705c121SKalle Valo * won't get stuck on the queue and be transmitted in the next 120e705c121SKalle Valo * time event. 121e705c121SKalle Valo * We have to send the command asynchronously since this cannot 122e705c121SKalle Valo * be under the mutex for locking reasons, but that's not an 123e705c121SKalle Valo * issue as it will have to complete before the next command is 124e705c121SKalle Valo * executed, and a new time event means a new command. 125e705c121SKalle Valo */ 126d49394a1SSara Sharon iwl_mvm_flush_sta(mvm, &mvm->aux_sta, true, CMD_ASYNC); 1276c2d49fdSJohannes Berg 1286c2d49fdSJohannes Berg /* Do the same for the P2P device queue (STA) */ 1296c2d49fdSJohannes Berg if (test_and_clear_bit(IWL_MVM_STATUS_NEED_FLUSH_P2P, &mvm->status)) { 1306c2d49fdSJohannes Berg struct iwl_mvm_vif *mvmvif; 1316c2d49fdSJohannes Berg 1326c2d49fdSJohannes Berg /* 1336c2d49fdSJohannes Berg * NB: access to this pointer would be racy, but the flush bit 1346c2d49fdSJohannes Berg * can only be set when we had a P2P-Device VIF, and we have a 1356c2d49fdSJohannes Berg * flush of this work in iwl_mvm_prepare_mac_removal() so it's 1366c2d49fdSJohannes Berg * not really racy. 1376c2d49fdSJohannes Berg */ 1386c2d49fdSJohannes Berg 1396c2d49fdSJohannes Berg if (!WARN_ON(!mvm->p2p_device_vif)) { 1406c2d49fdSJohannes Berg mvmvif = iwl_mvm_vif_from_mac80211(mvm->p2p_device_vif); 1416c2d49fdSJohannes Berg iwl_mvm_flush_sta(mvm, &mvmvif->bcast_sta, true, 1426c2d49fdSJohannes Berg CMD_ASYNC); 1436c2d49fdSJohannes Berg } 1446c2d49fdSJohannes Berg } 145e705c121SKalle Valo } 146e705c121SKalle Valo 147e705c121SKalle Valo static void iwl_mvm_roc_finished(struct iwl_mvm *mvm) 148e705c121SKalle Valo { 149e705c121SKalle Valo /* 150e705c121SKalle Valo * Of course, our status bit is just as racy as mac80211, so in 151e705c121SKalle Valo * addition, fire off the work struct which will drop all frames 152e705c121SKalle Valo * from the hardware queues that made it through the race. First 153e705c121SKalle Valo * it will of course synchronize the TX path to make sure that 154e705c121SKalle Valo * any *new* TX will be rejected. 155e705c121SKalle Valo */ 156e705c121SKalle Valo schedule_work(&mvm->roc_done_wk); 157e705c121SKalle Valo } 158e705c121SKalle Valo 159e705c121SKalle Valo static void iwl_mvm_csa_noa_start(struct iwl_mvm *mvm) 160e705c121SKalle Valo { 161e705c121SKalle Valo struct ieee80211_vif *csa_vif; 162e705c121SKalle Valo 163e705c121SKalle Valo rcu_read_lock(); 164e705c121SKalle Valo 165e705c121SKalle Valo csa_vif = rcu_dereference(mvm->csa_vif); 166e705c121SKalle Valo if (!csa_vif || !csa_vif->csa_active) 167e705c121SKalle Valo goto out_unlock; 168e705c121SKalle Valo 169e705c121SKalle Valo IWL_DEBUG_TE(mvm, "CSA NOA started\n"); 170e705c121SKalle Valo 171e705c121SKalle Valo /* 172e705c121SKalle Valo * CSA NoA is started but we still have beacons to 173e705c121SKalle Valo * transmit on the current channel. 174e705c121SKalle Valo * So we just do nothing here and the switch 175e705c121SKalle Valo * will be performed on the last TBTT. 176e705c121SKalle Valo */ 177e705c121SKalle Valo if (!ieee80211_csa_is_complete(csa_vif)) { 178e705c121SKalle Valo IWL_WARN(mvm, "CSA NOA started too early\n"); 179e705c121SKalle Valo goto out_unlock; 180e705c121SKalle Valo } 181e705c121SKalle Valo 182e705c121SKalle Valo ieee80211_csa_finish(csa_vif); 183e705c121SKalle Valo 184e705c121SKalle Valo rcu_read_unlock(); 185e705c121SKalle Valo 186e705c121SKalle Valo RCU_INIT_POINTER(mvm->csa_vif, NULL); 187e705c121SKalle Valo 188e705c121SKalle Valo return; 189e705c121SKalle Valo 190e705c121SKalle Valo out_unlock: 191e705c121SKalle Valo rcu_read_unlock(); 192e705c121SKalle Valo } 193e705c121SKalle Valo 194e705c121SKalle Valo static bool iwl_mvm_te_check_disconnect(struct iwl_mvm *mvm, 195e705c121SKalle Valo struct ieee80211_vif *vif, 196e705c121SKalle Valo const char *errmsg) 197e705c121SKalle Valo { 19819125cb0SAndrei Otcheretianski struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 19919125cb0SAndrei Otcheretianski 200e705c121SKalle Valo if (vif->type != NL80211_IFTYPE_STATION) 201e705c121SKalle Valo return false; 20219125cb0SAndrei Otcheretianski 20319125cb0SAndrei Otcheretianski if (!mvmvif->csa_bcn_pending && vif->bss_conf.assoc && 20419125cb0SAndrei Otcheretianski vif->bss_conf.dtim_period) 205e705c121SKalle Valo return false; 206e705c121SKalle Valo if (errmsg) 207e705c121SKalle Valo IWL_ERR(mvm, "%s\n", errmsg); 208e705c121SKalle Valo 209e705c121SKalle Valo iwl_mvm_connection_loss(mvm, vif, errmsg); 210e705c121SKalle Valo return true; 211e705c121SKalle Valo } 212e705c121SKalle Valo 213e705c121SKalle Valo static void 214e705c121SKalle Valo iwl_mvm_te_handle_notify_csa(struct iwl_mvm *mvm, 215e705c121SKalle Valo struct iwl_mvm_time_event_data *te_data, 216e705c121SKalle Valo struct iwl_time_event_notif *notif) 217e705c121SKalle Valo { 218e705c121SKalle Valo struct ieee80211_vif *vif = te_data->vif; 219e705c121SKalle Valo struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 220e705c121SKalle Valo 221e705c121SKalle Valo if (!notif->status) 222e705c121SKalle Valo IWL_DEBUG_TE(mvm, "CSA time event failed to start\n"); 223e705c121SKalle Valo 224e705c121SKalle Valo switch (te_data->vif->type) { 225e705c121SKalle Valo case NL80211_IFTYPE_AP: 226e705c121SKalle Valo if (!notif->status) 227e705c121SKalle Valo mvmvif->csa_failed = true; 228e705c121SKalle Valo iwl_mvm_csa_noa_start(mvm); 229e705c121SKalle Valo break; 230e705c121SKalle Valo case NL80211_IFTYPE_STATION: 231e705c121SKalle Valo if (!notif->status) { 232e705c121SKalle Valo iwl_mvm_connection_loss(mvm, vif, 233e705c121SKalle Valo "CSA TE failed to start"); 234e705c121SKalle Valo break; 235e705c121SKalle Valo } 236e705c121SKalle Valo iwl_mvm_csa_client_absent(mvm, te_data->vif); 237e705c121SKalle Valo ieee80211_chswitch_done(te_data->vif, true); 238e705c121SKalle Valo break; 239e705c121SKalle Valo default: 240e705c121SKalle Valo /* should never happen */ 241e705c121SKalle Valo WARN_ON_ONCE(1); 242e705c121SKalle Valo break; 243e705c121SKalle Valo } 244e705c121SKalle Valo 245e705c121SKalle Valo /* we don't need it anymore */ 246e705c121SKalle Valo iwl_mvm_te_clear_data(mvm, te_data); 247e705c121SKalle Valo } 248e705c121SKalle Valo 249e705c121SKalle Valo static void iwl_mvm_te_check_trigger(struct iwl_mvm *mvm, 250e705c121SKalle Valo struct iwl_time_event_notif *notif, 251e705c121SKalle Valo struct iwl_mvm_time_event_data *te_data) 252e705c121SKalle Valo { 253e705c121SKalle Valo struct iwl_fw_dbg_trigger_tlv *trig; 254e705c121SKalle Valo struct iwl_fw_dbg_trigger_time_event *te_trig; 255e705c121SKalle Valo int i; 256e705c121SKalle Valo 257*6c042d75SSara Sharon trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, 2587174beb6SJohannes Berg ieee80211_vif_to_wdev(te_data->vif), 259*6c042d75SSara Sharon FW_DBG_TRIGGER_TIME_EVENT); 260*6c042d75SSara Sharon if (!trig) 261e705c121SKalle Valo return; 262e705c121SKalle Valo 263*6c042d75SSara Sharon te_trig = (void *)trig->data; 264*6c042d75SSara Sharon 265e705c121SKalle Valo for (i = 0; i < ARRAY_SIZE(te_trig->time_events); i++) { 266e705c121SKalle Valo u32 trig_te_id = le32_to_cpu(te_trig->time_events[i].id); 267e705c121SKalle Valo u32 trig_action_bitmap = 268e705c121SKalle Valo le32_to_cpu(te_trig->time_events[i].action_bitmap); 269e705c121SKalle Valo u32 trig_status_bitmap = 270e705c121SKalle Valo le32_to_cpu(te_trig->time_events[i].status_bitmap); 271e705c121SKalle Valo 272e705c121SKalle Valo if (trig_te_id != te_data->id || 273e705c121SKalle Valo !(trig_action_bitmap & le32_to_cpu(notif->action)) || 274e705c121SKalle Valo !(trig_status_bitmap & BIT(le32_to_cpu(notif->status)))) 275e705c121SKalle Valo continue; 276e705c121SKalle Valo 2777174beb6SJohannes Berg iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 278e705c121SKalle Valo "Time event %d Action 0x%x received status: %d", 279e705c121SKalle Valo te_data->id, 280e705c121SKalle Valo le32_to_cpu(notif->action), 281e705c121SKalle Valo le32_to_cpu(notif->status)); 282e705c121SKalle Valo break; 283e705c121SKalle Valo } 284e705c121SKalle Valo } 285e705c121SKalle Valo 286e705c121SKalle Valo /* 287e705c121SKalle Valo * Handles a FW notification for an event that is known to the driver. 288e705c121SKalle Valo * 289e705c121SKalle Valo * @mvm: the mvm component 290e705c121SKalle Valo * @te_data: the time event data 291e705c121SKalle Valo * @notif: the notification data corresponding the time event data. 292e705c121SKalle Valo */ 293e705c121SKalle Valo static void iwl_mvm_te_handle_notif(struct iwl_mvm *mvm, 294e705c121SKalle Valo struct iwl_mvm_time_event_data *te_data, 295e705c121SKalle Valo struct iwl_time_event_notif *notif) 296e705c121SKalle Valo { 297e705c121SKalle Valo lockdep_assert_held(&mvm->time_event_lock); 298e705c121SKalle Valo 299e705c121SKalle Valo IWL_DEBUG_TE(mvm, "Handle time event notif - UID = 0x%x action %d\n", 300e705c121SKalle Valo le32_to_cpu(notif->unique_id), 301e705c121SKalle Valo le32_to_cpu(notif->action)); 302e705c121SKalle Valo 303e705c121SKalle Valo iwl_mvm_te_check_trigger(mvm, notif, te_data); 304e705c121SKalle Valo 305e705c121SKalle Valo /* 306e705c121SKalle Valo * The FW sends the start/end time event notifications even for events 307e705c121SKalle Valo * that it fails to schedule. This is indicated in the status field of 308e705c121SKalle Valo * the notification. This happens in cases that the scheduler cannot 309e705c121SKalle Valo * find a schedule that can handle the event (for example requesting a 310e705c121SKalle Valo * P2P Device discoveribility, while there are other higher priority 311e705c121SKalle Valo * events in the system). 312e705c121SKalle Valo */ 313e705c121SKalle Valo if (!le32_to_cpu(notif->status)) { 314e705c121SKalle Valo const char *msg; 315e705c121SKalle Valo 316e705c121SKalle Valo if (notif->action & cpu_to_le32(TE_V2_NOTIF_HOST_EVENT_START)) 317e705c121SKalle Valo msg = "Time Event start notification failure"; 318e705c121SKalle Valo else 319e705c121SKalle Valo msg = "Time Event end notification failure"; 320e705c121SKalle Valo 321e705c121SKalle Valo IWL_DEBUG_TE(mvm, "%s\n", msg); 322e705c121SKalle Valo 323e705c121SKalle Valo if (iwl_mvm_te_check_disconnect(mvm, te_data->vif, msg)) { 324e705c121SKalle Valo iwl_mvm_te_clear_data(mvm, te_data); 325e705c121SKalle Valo return; 326e705c121SKalle Valo } 327e705c121SKalle Valo } 328e705c121SKalle Valo 329e705c121SKalle Valo if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_END) { 330e705c121SKalle Valo IWL_DEBUG_TE(mvm, 331e705c121SKalle Valo "TE ended - current time %lu, estimated end %lu\n", 332e705c121SKalle Valo jiffies, te_data->end_jiffies); 333e705c121SKalle Valo 334e705c121SKalle Valo switch (te_data->vif->type) { 335e705c121SKalle Valo case NL80211_IFTYPE_P2P_DEVICE: 336e705c121SKalle Valo ieee80211_remain_on_channel_expired(mvm->hw); 337e705c121SKalle Valo iwl_mvm_roc_finished(mvm); 338e705c121SKalle Valo break; 339e705c121SKalle Valo case NL80211_IFTYPE_STATION: 340e705c121SKalle Valo /* 341e705c121SKalle Valo * By now, we should have finished association 342e705c121SKalle Valo * and know the dtim period. 343e705c121SKalle Valo */ 344e705c121SKalle Valo iwl_mvm_te_check_disconnect(mvm, te_data->vif, 34519125cb0SAndrei Otcheretianski "No beacon heard and the time event is over already..."); 346e705c121SKalle Valo break; 347e705c121SKalle Valo default: 348e705c121SKalle Valo break; 349e705c121SKalle Valo } 350e705c121SKalle Valo 351e705c121SKalle Valo iwl_mvm_te_clear_data(mvm, te_data); 352e705c121SKalle Valo } else if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_START) { 353e705c121SKalle Valo te_data->running = true; 354e705c121SKalle Valo te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration); 355e705c121SKalle Valo 356e705c121SKalle Valo if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { 357e705c121SKalle Valo set_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status); 358e705c121SKalle Valo iwl_mvm_ref(mvm, IWL_MVM_REF_ROC); 359e705c121SKalle Valo ieee80211_ready_on_channel(mvm->hw); 360e705c121SKalle Valo } else if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) { 361e705c121SKalle Valo iwl_mvm_te_handle_notify_csa(mvm, te_data, notif); 362e705c121SKalle Valo } 363e705c121SKalle Valo } else { 364e705c121SKalle Valo IWL_WARN(mvm, "Got TE with unknown action\n"); 365e705c121SKalle Valo } 366e705c121SKalle Valo } 367e705c121SKalle Valo 368e705c121SKalle Valo /* 369e705c121SKalle Valo * Handle A Aux ROC time event 370e705c121SKalle Valo */ 371e705c121SKalle Valo static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm *mvm, 372e705c121SKalle Valo struct iwl_time_event_notif *notif) 373e705c121SKalle Valo { 374e705c121SKalle Valo struct iwl_mvm_time_event_data *te_data, *tmp; 375e705c121SKalle Valo bool aux_roc_te = false; 376e705c121SKalle Valo 377e705c121SKalle Valo list_for_each_entry_safe(te_data, tmp, &mvm->aux_roc_te_list, list) { 378e705c121SKalle Valo if (le32_to_cpu(notif->unique_id) == te_data->uid) { 379e705c121SKalle Valo aux_roc_te = true; 380e705c121SKalle Valo break; 381e705c121SKalle Valo } 382e705c121SKalle Valo } 383e705c121SKalle Valo if (!aux_roc_te) /* Not a Aux ROC time event */ 384e705c121SKalle Valo return -EINVAL; 385e705c121SKalle Valo 386e705c121SKalle Valo iwl_mvm_te_check_trigger(mvm, notif, te_data); 387e705c121SKalle Valo 388e705c121SKalle Valo IWL_DEBUG_TE(mvm, 3895151ad95SMatti Gottlieb "Aux ROC time event notification - UID = 0x%x action %d (error = %d)\n", 390e705c121SKalle Valo le32_to_cpu(notif->unique_id), 3915151ad95SMatti Gottlieb le32_to_cpu(notif->action), le32_to_cpu(notif->status)); 392e705c121SKalle Valo 3935151ad95SMatti Gottlieb if (!le32_to_cpu(notif->status) || 3945151ad95SMatti Gottlieb le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_END) { 395e705c121SKalle Valo /* End TE, notify mac80211 */ 396e705c121SKalle Valo ieee80211_remain_on_channel_expired(mvm->hw); 397e705c121SKalle Valo iwl_mvm_roc_finished(mvm); /* flush aux queue */ 398e705c121SKalle Valo list_del(&te_data->list); /* remove from list */ 399e705c121SKalle Valo te_data->running = false; 400e705c121SKalle Valo te_data->vif = NULL; 401e705c121SKalle Valo te_data->uid = 0; 402e705c121SKalle Valo te_data->id = TE_MAX; 403e705c121SKalle Valo } else if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_START) { 404e705c121SKalle Valo set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status); 405e705c121SKalle Valo te_data->running = true; 406e705c121SKalle Valo iwl_mvm_ref(mvm, IWL_MVM_REF_ROC_AUX); 407e705c121SKalle Valo ieee80211_ready_on_channel(mvm->hw); /* Start TE */ 408e705c121SKalle Valo } else { 409e705c121SKalle Valo IWL_DEBUG_TE(mvm, 410e705c121SKalle Valo "ERROR: Unknown Aux ROC Time Event (action = %d)\n", 411e705c121SKalle Valo le32_to_cpu(notif->action)); 412e705c121SKalle Valo return -EINVAL; 413e705c121SKalle Valo } 414e705c121SKalle Valo 415e705c121SKalle Valo return 0; 416e705c121SKalle Valo } 417e705c121SKalle Valo 418e705c121SKalle Valo /* 419e705c121SKalle Valo * The Rx handler for time event notifications 420e705c121SKalle Valo */ 421e705c121SKalle Valo void iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm, 422e705c121SKalle Valo struct iwl_rx_cmd_buffer *rxb) 423e705c121SKalle Valo { 424e705c121SKalle Valo struct iwl_rx_packet *pkt = rxb_addr(rxb); 425e705c121SKalle Valo struct iwl_time_event_notif *notif = (void *)pkt->data; 426e705c121SKalle Valo struct iwl_mvm_time_event_data *te_data, *tmp; 427e705c121SKalle Valo 428e705c121SKalle Valo IWL_DEBUG_TE(mvm, "Time event notification - UID = 0x%x action %d\n", 429e705c121SKalle Valo le32_to_cpu(notif->unique_id), 430e705c121SKalle Valo le32_to_cpu(notif->action)); 431e705c121SKalle Valo 432e705c121SKalle Valo spin_lock_bh(&mvm->time_event_lock); 433e705c121SKalle Valo /* This time event is triggered for Aux ROC request */ 434e705c121SKalle Valo if (!iwl_mvm_aux_roc_te_handle_notif(mvm, notif)) 435e705c121SKalle Valo goto unlock; 436e705c121SKalle Valo 437e705c121SKalle Valo list_for_each_entry_safe(te_data, tmp, &mvm->time_event_list, list) { 438e705c121SKalle Valo if (le32_to_cpu(notif->unique_id) == te_data->uid) 439e705c121SKalle Valo iwl_mvm_te_handle_notif(mvm, te_data, notif); 440e705c121SKalle Valo } 441e705c121SKalle Valo unlock: 442e705c121SKalle Valo spin_unlock_bh(&mvm->time_event_lock); 443e705c121SKalle Valo } 444e705c121SKalle Valo 445e705c121SKalle Valo static bool iwl_mvm_te_notif(struct iwl_notif_wait_data *notif_wait, 446e705c121SKalle Valo struct iwl_rx_packet *pkt, void *data) 447e705c121SKalle Valo { 448e705c121SKalle Valo struct iwl_mvm *mvm = 449e705c121SKalle Valo container_of(notif_wait, struct iwl_mvm, notif_wait); 450e705c121SKalle Valo struct iwl_mvm_time_event_data *te_data = data; 451e705c121SKalle Valo struct iwl_time_event_notif *resp; 452e705c121SKalle Valo int resp_len = iwl_rx_packet_payload_len(pkt); 453e705c121SKalle Valo 454e705c121SKalle Valo if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_NOTIFICATION)) 455e705c121SKalle Valo return true; 456e705c121SKalle Valo 457e705c121SKalle Valo if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { 458e705c121SKalle Valo IWL_ERR(mvm, "Invalid TIME_EVENT_NOTIFICATION response\n"); 459e705c121SKalle Valo return true; 460e705c121SKalle Valo } 461e705c121SKalle Valo 462e705c121SKalle Valo resp = (void *)pkt->data; 463e705c121SKalle Valo 464e705c121SKalle Valo /* te_data->uid is already set in the TIME_EVENT_CMD response */ 465e705c121SKalle Valo if (le32_to_cpu(resp->unique_id) != te_data->uid) 466e705c121SKalle Valo return false; 467e705c121SKalle Valo 468e705c121SKalle Valo IWL_DEBUG_TE(mvm, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n", 469e705c121SKalle Valo te_data->uid); 470e705c121SKalle Valo if (!resp->status) 471e705c121SKalle Valo IWL_ERR(mvm, 472e705c121SKalle Valo "TIME_EVENT_NOTIFICATION received but not executed\n"); 473e705c121SKalle Valo 474e705c121SKalle Valo return true; 475e705c121SKalle Valo } 476e705c121SKalle Valo 477e705c121SKalle Valo static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait, 478e705c121SKalle Valo struct iwl_rx_packet *pkt, void *data) 479e705c121SKalle Valo { 480e705c121SKalle Valo struct iwl_mvm *mvm = 481e705c121SKalle Valo container_of(notif_wait, struct iwl_mvm, notif_wait); 482e705c121SKalle Valo struct iwl_mvm_time_event_data *te_data = data; 483e705c121SKalle Valo struct iwl_time_event_resp *resp; 484e705c121SKalle Valo int resp_len = iwl_rx_packet_payload_len(pkt); 485e705c121SKalle Valo 486e705c121SKalle Valo if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD)) 487e705c121SKalle Valo return true; 488e705c121SKalle Valo 489e705c121SKalle Valo if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { 490e705c121SKalle Valo IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n"); 491e705c121SKalle Valo return true; 492e705c121SKalle Valo } 493e705c121SKalle Valo 494e705c121SKalle Valo resp = (void *)pkt->data; 495e705c121SKalle Valo 496e705c121SKalle Valo /* we should never get a response to another TIME_EVENT_CMD here */ 497e705c121SKalle Valo if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id)) 498e705c121SKalle Valo return false; 499e705c121SKalle Valo 500e705c121SKalle Valo te_data->uid = le32_to_cpu(resp->unique_id); 501e705c121SKalle Valo IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n", 502e705c121SKalle Valo te_data->uid); 503e705c121SKalle Valo return true; 504e705c121SKalle Valo } 505e705c121SKalle Valo 506e705c121SKalle Valo static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm, 507e705c121SKalle Valo struct ieee80211_vif *vif, 508e705c121SKalle Valo struct iwl_mvm_time_event_data *te_data, 509e705c121SKalle Valo struct iwl_time_event_cmd *te_cmd) 510e705c121SKalle Valo { 511e705c121SKalle Valo static const u16 time_event_response[] = { TIME_EVENT_CMD }; 512e705c121SKalle Valo struct iwl_notification_wait wait_time_event; 513e705c121SKalle Valo int ret; 514e705c121SKalle Valo 515e705c121SKalle Valo lockdep_assert_held(&mvm->mutex); 516e705c121SKalle Valo 517e705c121SKalle Valo IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n", 518e705c121SKalle Valo le32_to_cpu(te_cmd->duration)); 519e705c121SKalle Valo 520e705c121SKalle Valo spin_lock_bh(&mvm->time_event_lock); 521e705c121SKalle Valo if (WARN_ON(te_data->id != TE_MAX)) { 522e705c121SKalle Valo spin_unlock_bh(&mvm->time_event_lock); 523e705c121SKalle Valo return -EIO; 524e705c121SKalle Valo } 525e705c121SKalle Valo te_data->vif = vif; 526e705c121SKalle Valo te_data->duration = le32_to_cpu(te_cmd->duration); 527e705c121SKalle Valo te_data->id = le32_to_cpu(te_cmd->id); 528e705c121SKalle Valo list_add_tail(&te_data->list, &mvm->time_event_list); 529e705c121SKalle Valo spin_unlock_bh(&mvm->time_event_lock); 530e705c121SKalle Valo 531e705c121SKalle Valo /* 532e705c121SKalle Valo * Use a notification wait, which really just processes the 533e705c121SKalle Valo * command response and doesn't wait for anything, in order 534e705c121SKalle Valo * to be able to process the response and get the UID inside 535e705c121SKalle Valo * the RX path. Using CMD_WANT_SKB doesn't work because it 536e705c121SKalle Valo * stores the buffer and then wakes up this thread, by which 537e705c121SKalle Valo * time another notification (that the time event started) 538e705c121SKalle Valo * might already be processed unsuccessfully. 539e705c121SKalle Valo */ 540e705c121SKalle Valo iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event, 541e705c121SKalle Valo time_event_response, 542e705c121SKalle Valo ARRAY_SIZE(time_event_response), 543e705c121SKalle Valo iwl_mvm_time_event_response, te_data); 544e705c121SKalle Valo 545e705c121SKalle Valo ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, 546e705c121SKalle Valo sizeof(*te_cmd), te_cmd); 547e705c121SKalle Valo if (ret) { 548e705c121SKalle Valo IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret); 549e705c121SKalle Valo iwl_remove_notification(&mvm->notif_wait, &wait_time_event); 550e705c121SKalle Valo goto out_clear_te; 551e705c121SKalle Valo } 552e705c121SKalle Valo 553e705c121SKalle Valo /* No need to wait for anything, so just pass 1 (0 isn't valid) */ 554e705c121SKalle Valo ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1); 555e705c121SKalle Valo /* should never fail */ 556e705c121SKalle Valo WARN_ON_ONCE(ret); 557e705c121SKalle Valo 558e705c121SKalle Valo if (ret) { 559e705c121SKalle Valo out_clear_te: 560e705c121SKalle Valo spin_lock_bh(&mvm->time_event_lock); 561e705c121SKalle Valo iwl_mvm_te_clear_data(mvm, te_data); 562e705c121SKalle Valo spin_unlock_bh(&mvm->time_event_lock); 563e705c121SKalle Valo } 564e705c121SKalle Valo return ret; 565e705c121SKalle Valo } 566e705c121SKalle Valo 567e705c121SKalle Valo void iwl_mvm_protect_session(struct iwl_mvm *mvm, 568e705c121SKalle Valo struct ieee80211_vif *vif, 569e705c121SKalle Valo u32 duration, u32 min_duration, 570e705c121SKalle Valo u32 max_delay, bool wait_for_notif) 571e705c121SKalle Valo { 572e705c121SKalle Valo struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 573e705c121SKalle Valo struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; 574e705c121SKalle Valo const u16 te_notif_response[] = { TIME_EVENT_NOTIFICATION }; 575e705c121SKalle Valo struct iwl_notification_wait wait_te_notif; 576e705c121SKalle Valo struct iwl_time_event_cmd time_cmd = {}; 577e705c121SKalle Valo 578e705c121SKalle Valo lockdep_assert_held(&mvm->mutex); 579e705c121SKalle Valo 580e705c121SKalle Valo if (te_data->running && 581e705c121SKalle Valo time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) { 582e705c121SKalle Valo IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n", 583e705c121SKalle Valo jiffies_to_msecs(te_data->end_jiffies - jiffies)); 584e705c121SKalle Valo return; 585e705c121SKalle Valo } 586e705c121SKalle Valo 587e705c121SKalle Valo if (te_data->running) { 588e705c121SKalle Valo IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n", 589e705c121SKalle Valo te_data->uid, 590e705c121SKalle Valo jiffies_to_msecs(te_data->end_jiffies - jiffies)); 591e705c121SKalle Valo /* 592e705c121SKalle Valo * we don't have enough time 593e705c121SKalle Valo * cancel the current TE and issue a new one 594e705c121SKalle Valo * Of course it would be better to remove the old one only 595e705c121SKalle Valo * when the new one is added, but we don't care if we are off 596e705c121SKalle Valo * channel for a bit. All we need to do, is not to return 597e705c121SKalle Valo * before we actually begin to be on the channel. 598e705c121SKalle Valo */ 599e705c121SKalle Valo iwl_mvm_stop_session_protection(mvm, vif); 600e705c121SKalle Valo } 601e705c121SKalle Valo 602e705c121SKalle Valo time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); 603e705c121SKalle Valo time_cmd.id_and_color = 604e705c121SKalle Valo cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); 605e705c121SKalle Valo time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC); 606e705c121SKalle Valo 607e705c121SKalle Valo time_cmd.apply_time = cpu_to_le32(0); 608e705c121SKalle Valo 609e705c121SKalle Valo time_cmd.max_frags = TE_V2_FRAG_NONE; 610e705c121SKalle Valo time_cmd.max_delay = cpu_to_le32(max_delay); 611e705c121SKalle Valo /* TODO: why do we need to interval = bi if it is not periodic? */ 612e705c121SKalle Valo time_cmd.interval = cpu_to_le32(1); 613e705c121SKalle Valo time_cmd.duration = cpu_to_le32(duration); 614e705c121SKalle Valo time_cmd.repeat = 1; 615e705c121SKalle Valo time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | 616e705c121SKalle Valo TE_V2_NOTIF_HOST_EVENT_END | 61740d53f4aSAndrei Otcheretianski TE_V2_START_IMMEDIATELY); 618e705c121SKalle Valo 619e705c121SKalle Valo if (!wait_for_notif) { 620e705c121SKalle Valo iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); 621e705c121SKalle Valo return; 622e705c121SKalle Valo } 623e705c121SKalle Valo 624e705c121SKalle Valo /* 625e705c121SKalle Valo * Create notification_wait for the TIME_EVENT_NOTIFICATION to use 626e705c121SKalle Valo * right after we send the time event 627e705c121SKalle Valo */ 628e705c121SKalle Valo iwl_init_notification_wait(&mvm->notif_wait, &wait_te_notif, 629e705c121SKalle Valo te_notif_response, 630e705c121SKalle Valo ARRAY_SIZE(te_notif_response), 631e705c121SKalle Valo iwl_mvm_te_notif, te_data); 632e705c121SKalle Valo 633e705c121SKalle Valo /* If TE was sent OK - wait for the notification that started */ 634e705c121SKalle Valo if (iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd)) { 635e705c121SKalle Valo IWL_ERR(mvm, "Failed to add TE to protect session\n"); 636e705c121SKalle Valo iwl_remove_notification(&mvm->notif_wait, &wait_te_notif); 637e705c121SKalle Valo } else if (iwl_wait_notification(&mvm->notif_wait, &wait_te_notif, 638e705c121SKalle Valo TU_TO_JIFFIES(max_delay))) { 639e705c121SKalle Valo IWL_ERR(mvm, "Failed to protect session until TE\n"); 640e705c121SKalle Valo } 641e705c121SKalle Valo } 642e705c121SKalle Valo 643e705c121SKalle Valo static bool __iwl_mvm_remove_time_event(struct iwl_mvm *mvm, 644e705c121SKalle Valo struct iwl_mvm_time_event_data *te_data, 645e705c121SKalle Valo u32 *uid) 646e705c121SKalle Valo { 647e705c121SKalle Valo u32 id; 648e705c121SKalle Valo 649e705c121SKalle Valo /* 650e705c121SKalle Valo * It is possible that by the time we got to this point the time 651e705c121SKalle Valo * event was already removed. 652e705c121SKalle Valo */ 653e705c121SKalle Valo spin_lock_bh(&mvm->time_event_lock); 654e705c121SKalle Valo 655e705c121SKalle Valo /* Save time event uid before clearing its data */ 656e705c121SKalle Valo *uid = te_data->uid; 657e705c121SKalle Valo id = te_data->id; 658e705c121SKalle Valo 659e705c121SKalle Valo /* 660e705c121SKalle Valo * The clear_data function handles time events that were already removed 661e705c121SKalle Valo */ 662e705c121SKalle Valo iwl_mvm_te_clear_data(mvm, te_data); 663e705c121SKalle Valo spin_unlock_bh(&mvm->time_event_lock); 664e705c121SKalle Valo 665e705c121SKalle Valo /* 666e705c121SKalle Valo * It is possible that by the time we try to remove it, the time event 667e705c121SKalle Valo * has already ended and removed. In such a case there is no need to 668e705c121SKalle Valo * send a removal command. 669e705c121SKalle Valo */ 670e705c121SKalle Valo if (id == TE_MAX) { 671e705c121SKalle Valo IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", *uid); 672e705c121SKalle Valo return false; 673e705c121SKalle Valo } 674e705c121SKalle Valo 675e705c121SKalle Valo return true; 676e705c121SKalle Valo } 677e705c121SKalle Valo 678e705c121SKalle Valo /* 679e705c121SKalle Valo * Explicit request to remove a aux roc time event. The removal of a time 680e705c121SKalle Valo * event needs to be synchronized with the flow of a time event's end 681e705c121SKalle Valo * notification, which also removes the time event from the op mode 682e705c121SKalle Valo * data structures. 683e705c121SKalle Valo */ 684e705c121SKalle Valo static void iwl_mvm_remove_aux_roc_te(struct iwl_mvm *mvm, 685e705c121SKalle Valo struct iwl_mvm_vif *mvmvif, 686e705c121SKalle Valo struct iwl_mvm_time_event_data *te_data) 687e705c121SKalle Valo { 688e705c121SKalle Valo struct iwl_hs20_roc_req aux_cmd = {}; 689e705c121SKalle Valo u32 uid; 690e705c121SKalle Valo int ret; 691e705c121SKalle Valo 692e705c121SKalle Valo if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid)) 693e705c121SKalle Valo return; 694e705c121SKalle Valo 695e705c121SKalle Valo aux_cmd.event_unique_id = cpu_to_le32(uid); 696e705c121SKalle Valo aux_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); 697e705c121SKalle Valo aux_cmd.id_and_color = 698e705c121SKalle Valo cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); 699e705c121SKalle Valo IWL_DEBUG_TE(mvm, "Removing BSS AUX ROC TE 0x%x\n", 700e705c121SKalle Valo le32_to_cpu(aux_cmd.event_unique_id)); 701e705c121SKalle Valo ret = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, 702e705c121SKalle Valo sizeof(aux_cmd), &aux_cmd); 703e705c121SKalle Valo 704e705c121SKalle Valo if (WARN_ON(ret)) 705e705c121SKalle Valo return; 706e705c121SKalle Valo } 707e705c121SKalle Valo 708e705c121SKalle Valo /* 709e705c121SKalle Valo * Explicit request to remove a time event. The removal of a time event needs to 710e705c121SKalle Valo * be synchronized with the flow of a time event's end notification, which also 711e705c121SKalle Valo * removes the time event from the op mode data structures. 712e705c121SKalle Valo */ 713e705c121SKalle Valo void iwl_mvm_remove_time_event(struct iwl_mvm *mvm, 714e705c121SKalle Valo struct iwl_mvm_vif *mvmvif, 715e705c121SKalle Valo struct iwl_mvm_time_event_data *te_data) 716e705c121SKalle Valo { 717e705c121SKalle Valo struct iwl_time_event_cmd time_cmd = {}; 718e705c121SKalle Valo u32 uid; 719e705c121SKalle Valo int ret; 720e705c121SKalle Valo 721e705c121SKalle Valo if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid)) 722e705c121SKalle Valo return; 723e705c121SKalle Valo 724e705c121SKalle Valo /* When we remove a TE, the UID is to be set in the id field */ 725e705c121SKalle Valo time_cmd.id = cpu_to_le32(uid); 726e705c121SKalle Valo time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); 727e705c121SKalle Valo time_cmd.id_and_color = 728e705c121SKalle Valo cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); 729e705c121SKalle Valo 730e705c121SKalle Valo IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id)); 731e705c121SKalle Valo ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, 732e705c121SKalle Valo sizeof(time_cmd), &time_cmd); 733e705c121SKalle Valo if (WARN_ON(ret)) 734e705c121SKalle Valo return; 735e705c121SKalle Valo } 736e705c121SKalle Valo 737e705c121SKalle Valo void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm, 738e705c121SKalle Valo struct ieee80211_vif *vif) 739e705c121SKalle Valo { 740e705c121SKalle Valo struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 741e705c121SKalle Valo struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; 7423edfb5f4SAvraham Stern u32 id; 743e705c121SKalle Valo 744e705c121SKalle Valo lockdep_assert_held(&mvm->mutex); 7453edfb5f4SAvraham Stern 7463edfb5f4SAvraham Stern spin_lock_bh(&mvm->time_event_lock); 7473edfb5f4SAvraham Stern id = te_data->id; 7483edfb5f4SAvraham Stern spin_unlock_bh(&mvm->time_event_lock); 7493edfb5f4SAvraham Stern 7503edfb5f4SAvraham Stern if (id != TE_BSS_STA_AGGRESSIVE_ASSOC) { 7513edfb5f4SAvraham Stern IWL_DEBUG_TE(mvm, 7523edfb5f4SAvraham Stern "don't remove TE with id=%u (not session protection)\n", 7533edfb5f4SAvraham Stern id); 7543edfb5f4SAvraham Stern return; 7553edfb5f4SAvraham Stern } 7563edfb5f4SAvraham Stern 757e705c121SKalle Valo iwl_mvm_remove_time_event(mvm, mvmvif, te_data); 758e705c121SKalle Valo } 759e705c121SKalle Valo 760e705c121SKalle Valo int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 761e705c121SKalle Valo int duration, enum ieee80211_roc_type type) 762e705c121SKalle Valo { 763e705c121SKalle Valo struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 764e705c121SKalle Valo struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; 765e705c121SKalle Valo struct iwl_time_event_cmd time_cmd = {}; 766e705c121SKalle Valo 767e705c121SKalle Valo lockdep_assert_held(&mvm->mutex); 768e705c121SKalle Valo if (te_data->running) { 769e705c121SKalle Valo IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n"); 770e705c121SKalle Valo return -EBUSY; 771e705c121SKalle Valo } 772e705c121SKalle Valo 773e705c121SKalle Valo time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); 774e705c121SKalle Valo time_cmd.id_and_color = 775e705c121SKalle Valo cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); 776e705c121SKalle Valo 777e705c121SKalle Valo switch (type) { 778e705c121SKalle Valo case IEEE80211_ROC_TYPE_NORMAL: 779e705c121SKalle Valo time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL); 780e705c121SKalle Valo break; 781e705c121SKalle Valo case IEEE80211_ROC_TYPE_MGMT_TX: 782e705c121SKalle Valo time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX); 783e705c121SKalle Valo break; 784e705c121SKalle Valo default: 785e705c121SKalle Valo WARN_ONCE(1, "Got an invalid ROC type\n"); 786e705c121SKalle Valo return -EINVAL; 787e705c121SKalle Valo } 788e705c121SKalle Valo 789e705c121SKalle Valo time_cmd.apply_time = cpu_to_le32(0); 790e705c121SKalle Valo time_cmd.interval = cpu_to_le32(1); 791e705c121SKalle Valo 792e705c121SKalle Valo /* 793e705c121SKalle Valo * The P2P Device TEs can have lower priority than other events 794e705c121SKalle Valo * that are being scheduled by the driver/fw, and thus it might not be 795e705c121SKalle Valo * scheduled. To improve the chances of it being scheduled, allow them 796e705c121SKalle Valo * to be fragmented, and in addition allow them to be delayed. 797e705c121SKalle Valo */ 798e705c121SKalle Valo time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS); 799e705c121SKalle Valo time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2)); 800e705c121SKalle Valo time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration)); 801e705c121SKalle Valo time_cmd.repeat = 1; 802e705c121SKalle Valo time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | 803e705c121SKalle Valo TE_V2_NOTIF_HOST_EVENT_END | 80440d53f4aSAndrei Otcheretianski TE_V2_START_IMMEDIATELY); 805e705c121SKalle Valo 806e705c121SKalle Valo return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); 807e705c121SKalle Valo } 808e705c121SKalle Valo 809305d236eSEliad Peller static struct iwl_mvm_time_event_data *iwl_mvm_get_roc_te(struct iwl_mvm *mvm) 810e705c121SKalle Valo { 811e705c121SKalle Valo struct iwl_mvm_time_event_data *te_data; 812e705c121SKalle Valo 813e705c121SKalle Valo lockdep_assert_held(&mvm->mutex); 814e705c121SKalle Valo 815e705c121SKalle Valo spin_lock_bh(&mvm->time_event_lock); 816e705c121SKalle Valo 817e705c121SKalle Valo /* 818e705c121SKalle Valo * Iterate over the list of time events and find the time event that is 819e705c121SKalle Valo * associated with a P2P_DEVICE interface. 820e705c121SKalle Valo * This assumes that a P2P_DEVICE interface can have only a single time 821e705c121SKalle Valo * event at any given time and this time event coresponds to a ROC 822e705c121SKalle Valo * request 823e705c121SKalle Valo */ 824e705c121SKalle Valo list_for_each_entry(te_data, &mvm->time_event_list, list) { 825305d236eSEliad Peller if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) 826305d236eSEliad Peller goto out; 827e705c121SKalle Valo } 828e705c121SKalle Valo 829e705c121SKalle Valo /* There can only be at most one AUX ROC time event, we just use the 830e705c121SKalle Valo * list to simplify/unify code. Remove it if it exists. 831e705c121SKalle Valo */ 832e705c121SKalle Valo te_data = list_first_entry_or_null(&mvm->aux_roc_te_list, 833e705c121SKalle Valo struct iwl_mvm_time_event_data, 834e705c121SKalle Valo list); 835305d236eSEliad Peller out: 836e705c121SKalle Valo spin_unlock_bh(&mvm->time_event_lock); 837305d236eSEliad Peller return te_data; 838305d236eSEliad Peller } 839e705c121SKalle Valo 840305d236eSEliad Peller void iwl_mvm_cleanup_roc_te(struct iwl_mvm *mvm) 841305d236eSEliad Peller { 842305d236eSEliad Peller struct iwl_mvm_time_event_data *te_data; 843305d236eSEliad Peller u32 uid; 844305d236eSEliad Peller 845305d236eSEliad Peller te_data = iwl_mvm_get_roc_te(mvm); 846305d236eSEliad Peller if (te_data) 847305d236eSEliad Peller __iwl_mvm_remove_time_event(mvm, te_data, &uid); 848305d236eSEliad Peller } 849305d236eSEliad Peller 850305d236eSEliad Peller void iwl_mvm_stop_roc(struct iwl_mvm *mvm) 851305d236eSEliad Peller { 852305d236eSEliad Peller struct iwl_mvm_vif *mvmvif; 853305d236eSEliad Peller struct iwl_mvm_time_event_data *te_data; 854305d236eSEliad Peller 855305d236eSEliad Peller te_data = iwl_mvm_get_roc_te(mvm); 856305d236eSEliad Peller if (!te_data) { 857e705c121SKalle Valo IWL_WARN(mvm, "No remain on channel event\n"); 858e705c121SKalle Valo return; 859e705c121SKalle Valo } 860e705c121SKalle Valo 861305d236eSEliad Peller mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); 862305d236eSEliad Peller 8636c2d49fdSJohannes Berg if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { 864e705c121SKalle Valo iwl_mvm_remove_time_event(mvm, mvmvif, te_data); 8656c2d49fdSJohannes Berg set_bit(IWL_MVM_STATUS_NEED_FLUSH_P2P, &mvm->status); 8666c2d49fdSJohannes Berg } else { 867e705c121SKalle Valo iwl_mvm_remove_aux_roc_te(mvm, mvmvif, te_data); 8686c2d49fdSJohannes Berg } 869e705c121SKalle Valo 870e705c121SKalle Valo iwl_mvm_roc_finished(mvm); 871e705c121SKalle Valo } 872e705c121SKalle Valo 873e705c121SKalle Valo int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm, 874e705c121SKalle Valo struct ieee80211_vif *vif, 875e705c121SKalle Valo u32 duration, u32 apply_time) 876e705c121SKalle Valo { 877e705c121SKalle Valo struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 878e705c121SKalle Valo struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; 879e705c121SKalle Valo struct iwl_time_event_cmd time_cmd = {}; 880e705c121SKalle Valo 881e705c121SKalle Valo lockdep_assert_held(&mvm->mutex); 882e705c121SKalle Valo 883e705c121SKalle Valo if (te_data->running) { 8843edfb5f4SAvraham Stern u32 id; 8853edfb5f4SAvraham Stern 8863edfb5f4SAvraham Stern spin_lock_bh(&mvm->time_event_lock); 8873edfb5f4SAvraham Stern id = te_data->id; 8883edfb5f4SAvraham Stern spin_unlock_bh(&mvm->time_event_lock); 8893edfb5f4SAvraham Stern 8903edfb5f4SAvraham Stern if (id == TE_CHANNEL_SWITCH_PERIOD) { 891e705c121SKalle Valo IWL_DEBUG_TE(mvm, "CS period is already scheduled\n"); 892e705c121SKalle Valo return -EBUSY; 893e705c121SKalle Valo } 894e705c121SKalle Valo 8953edfb5f4SAvraham Stern /* 8963edfb5f4SAvraham Stern * Remove the session protection time event to allow the 8973edfb5f4SAvraham Stern * channel switch. If we got here, we just heard a beacon so 8983edfb5f4SAvraham Stern * the session protection is not needed anymore anyway. 8993edfb5f4SAvraham Stern */ 9003edfb5f4SAvraham Stern iwl_mvm_remove_time_event(mvm, mvmvif, te_data); 9013edfb5f4SAvraham Stern } 9023edfb5f4SAvraham Stern 903e705c121SKalle Valo time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); 904e705c121SKalle Valo time_cmd.id_and_color = 905e705c121SKalle Valo cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); 906e705c121SKalle Valo time_cmd.id = cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD); 907e705c121SKalle Valo time_cmd.apply_time = cpu_to_le32(apply_time); 908e705c121SKalle Valo time_cmd.max_frags = TE_V2_FRAG_NONE; 909e705c121SKalle Valo time_cmd.duration = cpu_to_le32(duration); 910e705c121SKalle Valo time_cmd.repeat = 1; 911e705c121SKalle Valo time_cmd.interval = cpu_to_le32(1); 912e705c121SKalle Valo time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | 913e705c121SKalle Valo TE_V2_ABSENCE); 91440d53f4aSAndrei Otcheretianski if (!apply_time) 91540d53f4aSAndrei Otcheretianski time_cmd.policy |= cpu_to_le16(TE_V2_START_IMMEDIATELY); 916e705c121SKalle Valo 917e705c121SKalle Valo return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); 918e705c121SKalle Valo } 919