diff options
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/mvm/time-event.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/time-event.c | 1502 |
1 files changed, 1502 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c b/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c new file mode 100644 index 000000000000..0b12ee8ad618 --- /dev/null +++ b/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c @@ -0,0 +1,1502 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause +/* + * Copyright (C) 2012-2014, 2018-2025 Intel Corporation + * Copyright (C) 2013-2015 Intel Mobile Communications GmbH + * Copyright (C) 2017 Intel Deutschland GmbH + */ +#include <linux/jiffies.h> +#include <net/mac80211.h> + +#include "fw/notif-wait.h" +#include "iwl-trans.h" +#include "fw-api.h" +#include "time-event.h" +#include "mvm.h" +#include "iwl-io.h" +#include "iwl-prph.h" + +/* + * For the high priority TE use a time event type that has similar priority to + * the FW's action scan priority. + */ +#define IWL_MVM_ROC_TE_TYPE_NORMAL TE_P2P_DEVICE_DISCOVERABLE +#define IWL_MVM_ROC_TE_TYPE_MGMT_TX TE_P2P_CLIENT_ASSOC + +void iwl_mvm_te_clear_data(struct iwl_mvm *mvm, + struct iwl_mvm_time_event_data *te_data) +{ + lockdep_assert_held(&mvm->time_event_lock); + + if (!te_data || !te_data->vif) + return; + + list_del(&te_data->list); + + /* + * the list is only used for AUX ROC events so make sure it is always + * initialized + */ + INIT_LIST_HEAD(&te_data->list); + + te_data->running = false; + te_data->uid = 0; + te_data->id = TE_MAX; + te_data->vif = NULL; + te_data->link_id = -1; +} + +static void iwl_mvm_cleanup_roc(struct iwl_mvm *mvm) +{ + struct ieee80211_vif *vif = mvm->p2p_device_vif; + + lockdep_assert_held(&mvm->mutex); + + /* + * Clear the ROC_P2P_RUNNING status bit. + * This will cause the TX path to drop offchannel transmissions. + * That would also be done by mac80211, but it is racy, in particular + * in the case that the time event actually completed in the firmware. + * + * Also flush the offchannel queue -- this is called when the time + * event finishes or is canceled, so that frames queued for it + * won't get stuck on the queue and be transmitted in the next + * time event. + */ + if (test_and_clear_bit(IWL_MVM_STATUS_ROC_P2P_RUNNING, &mvm->status)) { + struct iwl_mvm_vif *mvmvif; + + synchronize_net(); + + /* + * NB: access to this pointer would be racy, but the flush bit + * can only be set when we had a P2P-Device VIF, and we have a + * flush of this work in iwl_mvm_prepare_mac_removal() so it's + * not really racy. + */ + + if (!WARN_ON(!vif)) { + mvmvif = iwl_mvm_vif_from_mac80211(vif); + iwl_mvm_flush_sta(mvm, mvmvif->deflink.bcast_sta.sta_id, + mvmvif->deflink.bcast_sta.tfd_queue_msk); + + if (mvm->mld_api_is_used) { + iwl_mvm_mld_rm_bcast_sta(mvm, vif, + &vif->bss_conf); + + iwl_mvm_link_changed(mvm, vif, &vif->bss_conf, + LINK_CONTEXT_MODIFY_ACTIVE, + false); + } else { + iwl_mvm_rm_p2p_bcast_sta(mvm, vif); + iwl_mvm_binding_remove_vif(mvm, vif); + } + + /* Do not remove the PHY context as removing and adding + * a PHY context has timing overheads. Leaving it + * configured in FW would be useful in case the next ROC + * is with the same channel. + */ + } + } + + /* + * P2P AUX ROC and HS2.0 ROC do not run simultaneously. + * Clear the ROC_AUX_RUNNING status bit. + * This will cause the TX path to drop offchannel transmissions. + * That would also be done by mac80211, but it is racy, in particular + * in the case that the time event actually completed in the firmware + * (which is handled in iwl_mvm_te_handle_notif). + */ + if (test_and_clear_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status)) { + synchronize_net(); + + iwl_mvm_flush_sta(mvm, mvm->aux_sta.sta_id, + mvm->aux_sta.tfd_queue_msk); + + /* In newer version of this command an aux station is added only + * in cases of dedicated tx queue and need to be removed in end + * of use. For the even newer mld api, use the appropriate + * function. + */ + if (mvm->mld_api_is_used) + iwl_mvm_mld_rm_aux_sta(mvm); + else if (iwl_mvm_has_new_station_api(mvm->fw)) + iwl_mvm_rm_aux_sta(mvm); + } + + mutex_unlock(&mvm->mutex); +} + +void iwl_mvm_roc_done_wk(struct work_struct *wk) +{ + struct iwl_mvm *mvm = container_of(wk, struct iwl_mvm, roc_done_wk); + + mutex_lock(&mvm->mutex); + /* Mutex is released inside */ + iwl_mvm_cleanup_roc(mvm); +} + +static void iwl_mvm_roc_finished(struct iwl_mvm *mvm) +{ + /* + * Of course, our status bit is just as racy as mac80211, so in + * addition, fire off the work struct which will drop all frames + * from the hardware queues that made it through the race. First + * it will of course synchronize the TX path to make sure that + * any *new* TX will be rejected. + */ + schedule_work(&mvm->roc_done_wk); +} + +static void iwl_mvm_csa_noa_start(struct iwl_mvm *mvm) +{ + struct ieee80211_vif *csa_vif; + + rcu_read_lock(); + + csa_vif = rcu_dereference(mvm->csa_vif); + if (!csa_vif || !csa_vif->bss_conf.csa_active) + goto out_unlock; + + IWL_DEBUG_TE(mvm, "CSA NOA started\n"); + + /* + * CSA NoA is started but we still have beacons to + * transmit on the current channel. + * So we just do nothing here and the switch + * will be performed on the last TBTT. + */ + if (!ieee80211_beacon_cntdwn_is_complete(csa_vif, 0)) { + IWL_WARN(mvm, "CSA NOA started too early\n"); + goto out_unlock; + } + + ieee80211_csa_finish(csa_vif, 0); + + rcu_read_unlock(); + + RCU_INIT_POINTER(mvm->csa_vif, NULL); + + return; + +out_unlock: + rcu_read_unlock(); +} + +static bool iwl_mvm_te_check_disconnect(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + const char *errmsg) +{ + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + + if (vif->type != NL80211_IFTYPE_STATION) + return false; + + if (!mvmvif->csa_bcn_pending && vif->cfg.assoc && + vif->bss_conf.dtim_period) + return false; + if (errmsg) + IWL_ERR(mvm, "%s\n", errmsg); + + if (mvmvif->csa_bcn_pending) { + struct iwl_mvm_sta *mvmsta; + + rcu_read_lock(); + mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, + mvmvif->deflink.ap_sta_id); + if (!WARN_ON(!mvmsta)) + iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false); + rcu_read_unlock(); + } + + if (vif->cfg.assoc) { + /* + * When not associated, this will be called from + * iwl_mvm_event_mlme_callback_ini() + */ + iwl_dbg_tlv_time_point(&mvm->fwrt, + IWL_FW_INI_TIME_POINT_ASSOC_FAILED, + NULL); + + mvmvif->session_prot_connection_loss = true; + } + + iwl_mvm_connection_loss(mvm, vif, errmsg); + return true; +} + +static void +iwl_mvm_te_handle_notify_csa(struct iwl_mvm *mvm, + struct iwl_mvm_time_event_data *te_data, + struct iwl_time_event_notif *notif) +{ + struct ieee80211_vif *vif = te_data->vif; + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + + if (!notif->status) + IWL_DEBUG_TE(mvm, "CSA time event failed to start\n"); + + switch (te_data->vif->type) { + case NL80211_IFTYPE_AP: + if (!notif->status) + mvmvif->csa_failed = true; + iwl_mvm_csa_noa_start(mvm); + break; + case NL80211_IFTYPE_STATION: + if (!notif->status) { + iwl_mvm_connection_loss(mvm, vif, + "CSA TE failed to start"); + break; + } + iwl_mvm_csa_client_absent(mvm, te_data->vif); + cancel_delayed_work(&mvmvif->csa_work); + ieee80211_chswitch_done(te_data->vif, true, 0); + break; + default: + /* should never happen */ + WARN_ON_ONCE(1); + break; + } + + /* we don't need it anymore */ + iwl_mvm_te_clear_data(mvm, te_data); +} + +static void iwl_mvm_te_check_trigger(struct iwl_mvm *mvm, + struct iwl_time_event_notif *notif, + struct iwl_mvm_time_event_data *te_data) +{ + struct iwl_fw_dbg_trigger_tlv *trig; + struct iwl_fw_dbg_trigger_time_event *te_trig; + int i; + + trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, + ieee80211_vif_to_wdev(te_data->vif), + FW_DBG_TRIGGER_TIME_EVENT); + if (!trig) + return; + + te_trig = (void *)trig->data; + + for (i = 0; i < ARRAY_SIZE(te_trig->time_events); i++) { + u32 trig_te_id = le32_to_cpu(te_trig->time_events[i].id); + u32 trig_action_bitmap = + le32_to_cpu(te_trig->time_events[i].action_bitmap); + u32 trig_status_bitmap = + le32_to_cpu(te_trig->time_events[i].status_bitmap); + + if (trig_te_id != te_data->id || + !(trig_action_bitmap & le32_to_cpu(notif->action)) || + !(trig_status_bitmap & BIT(le32_to_cpu(notif->status)))) + continue; + + iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, + "Time event %d Action 0x%x received status: %d", + te_data->id, + le32_to_cpu(notif->action), + le32_to_cpu(notif->status)); + break; + } +} + +/* + * Handles a FW notification for an event that is known to the driver. + * + * @mvm: the mvm component + * @te_data: the time event data + * @notif: the notification data corresponding the time event data. + */ +static void iwl_mvm_te_handle_notif(struct iwl_mvm *mvm, + struct iwl_mvm_time_event_data *te_data, + struct iwl_time_event_notif *notif) +{ + lockdep_assert_held(&mvm->time_event_lock); + + IWL_DEBUG_TE(mvm, "Handle time event notif - UID = 0x%x action %d\n", + le32_to_cpu(notif->unique_id), + le32_to_cpu(notif->action)); + + iwl_mvm_te_check_trigger(mvm, notif, te_data); + + /* + * The FW sends the start/end time event notifications even for events + * that it fails to schedule. This is indicated in the status field of + * the notification. This happens in cases that the scheduler cannot + * find a schedule that can handle the event (for example requesting a + * P2P Device discoveribility, while there are other higher priority + * events in the system). + */ + if (!le32_to_cpu(notif->status)) { + const char *msg; + + if (notif->action & cpu_to_le32(TE_V2_NOTIF_HOST_EVENT_START)) + msg = "Time Event start notification failure"; + else + msg = "Time Event end notification failure"; + + IWL_DEBUG_TE(mvm, "%s\n", msg); + + if (iwl_mvm_te_check_disconnect(mvm, te_data->vif, msg)) { + iwl_mvm_te_clear_data(mvm, te_data); + return; + } + } + + if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_END) { + IWL_DEBUG_TE(mvm, + "TE ended - current time %lu, estimated end %lu\n", + jiffies, te_data->end_jiffies); + + switch (te_data->vif->type) { + case NL80211_IFTYPE_P2P_DEVICE: + ieee80211_remain_on_channel_expired(mvm->hw); + iwl_mvm_roc_finished(mvm); + break; + case NL80211_IFTYPE_STATION: + /* + * If we are switching channel, don't disconnect + * if the time event is already done. Beacons can + * be delayed a bit after the switch. + */ + if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) { + IWL_DEBUG_TE(mvm, + "No beacon heard and the CS time event is over, don't disconnect\n"); + break; + } + + /* + * By now, we should have finished association + * and know the dtim period. + */ + iwl_mvm_te_check_disconnect(mvm, te_data->vif, + !te_data->vif->cfg.assoc ? + "Not associated and the time event is over already..." : + "No beacon heard and the time event is over already..."); + break; + default: + break; + } + + iwl_mvm_te_clear_data(mvm, te_data); + } else if (le32_to_cpu(notif->action) & TE_V2_NOTIF_HOST_EVENT_START) { + te_data->running = true; + te_data->end_jiffies = TU_TO_EXP_TIME(te_data->duration); + + if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) { + set_bit(IWL_MVM_STATUS_ROC_P2P_RUNNING, &mvm->status); + ieee80211_ready_on_channel(mvm->hw); + } else if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) { + iwl_mvm_te_handle_notify_csa(mvm, te_data, notif); + } + } else { + IWL_WARN(mvm, "Got TE with unknown action\n"); + } +} + +struct iwl_mvm_rx_roc_iterator_data { + u32 activity; + bool end_activity; + bool found; +}; + +static void iwl_mvm_rx_roc_iterator(void *_data, u8 *mac, + struct ieee80211_vif *vif) +{ + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + struct iwl_mvm_rx_roc_iterator_data *data = _data; + + if (mvmvif->roc_activity == data->activity) { + data->found = true; + if (data->end_activity) + mvmvif->roc_activity = ROC_NUM_ACTIVITIES; + } +} + +void iwl_mvm_rx_roc_notif(struct iwl_mvm *mvm, + struct iwl_rx_cmd_buffer *rxb) +{ + struct iwl_rx_packet *pkt = rxb_addr(rxb); + struct iwl_roc_notif *notif = (void *)pkt->data; + u32 activity = le32_to_cpu(notif->activity); + bool started = le32_to_cpu(notif->success) && + le32_to_cpu(notif->started); + struct iwl_mvm_rx_roc_iterator_data data = { + .activity = activity, + .end_activity = !started, + }; + + /* Clear vif roc_activity if done (set to ROC_NUM_ACTIVITIES) */ + ieee80211_iterate_active_interfaces_atomic(mvm->hw, + IEEE80211_IFACE_ITER_NORMAL, + iwl_mvm_rx_roc_iterator, + &data); + /* + * It is possible that the ROC was canceled + * but the notification was already fired. + */ + if (!data.found) + return; + + if (started) { + set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status); + ieee80211_ready_on_channel(mvm->hw); + } else { + iwl_mvm_roc_finished(mvm); + ieee80211_remain_on_channel_expired(mvm->hw); + } +} + +/* + * Handle A Aux ROC time event + */ +static int iwl_mvm_aux_roc_te_handle_notif(struct iwl_mvm *mvm, + struct iwl_time_event_notif *notif) +{ + struct iwl_mvm_time_event_data *aux_roc_te = NULL, *te_data; + + list_for_each_entry(te_data, &mvm->aux_roc_te_list, list) { + if (le32_to_cpu(notif->unique_id) == te_data->uid) { + aux_roc_te = te_data; + break; + } + } + if (!aux_roc_te) /* Not a Aux ROC time event */ + return -EINVAL; + + iwl_mvm_te_check_trigger(mvm, notif, aux_roc_te); + + IWL_DEBUG_TE(mvm, + "Aux ROC time event notification - UID = 0x%x action %d (error = %d)\n", + le32_to_cpu(notif->unique_id), + le32_to_cpu(notif->action), le32_to_cpu(notif->status)); + + if (!le32_to_cpu(notif->status) || + le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_END) { + /* End TE, notify mac80211 */ + ieee80211_remain_on_channel_expired(mvm->hw); + iwl_mvm_roc_finished(mvm); /* flush aux queue */ + list_del(&aux_roc_te->list); /* remove from list */ + aux_roc_te->running = false; + aux_roc_te->vif = NULL; + aux_roc_te->uid = 0; + aux_roc_te->id = TE_MAX; + } else if (le32_to_cpu(notif->action) == TE_V2_NOTIF_HOST_EVENT_START) { + set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status); + aux_roc_te->running = true; + ieee80211_ready_on_channel(mvm->hw); /* Start TE */ + } else { + IWL_DEBUG_TE(mvm, + "ERROR: Unknown Aux ROC Time Event (action = %d)\n", + le32_to_cpu(notif->action)); + return -EINVAL; + } + + return 0; +} + +/* + * The Rx handler for time event notifications + */ +void iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm, + struct iwl_rx_cmd_buffer *rxb) +{ + struct iwl_rx_packet *pkt = rxb_addr(rxb); + struct iwl_time_event_notif *notif = (void *)pkt->data; + struct iwl_mvm_time_event_data *te_data, *tmp; + + IWL_DEBUG_TE(mvm, "Time event notification - UID = 0x%x action %d\n", + le32_to_cpu(notif->unique_id), + le32_to_cpu(notif->action)); + + spin_lock_bh(&mvm->time_event_lock); + /* This time event is triggered for Aux ROC request */ + if (!iwl_mvm_aux_roc_te_handle_notif(mvm, notif)) + goto unlock; + + list_for_each_entry_safe(te_data, tmp, &mvm->time_event_list, list) { + if (le32_to_cpu(notif->unique_id) == te_data->uid) + iwl_mvm_te_handle_notif(mvm, te_data, notif); + } +unlock: + spin_unlock_bh(&mvm->time_event_lock); +} + +static bool iwl_mvm_te_notif(struct iwl_notif_wait_data *notif_wait, + struct iwl_rx_packet *pkt, void *data) +{ + struct iwl_mvm *mvm = + container_of(notif_wait, struct iwl_mvm, notif_wait); + struct iwl_mvm_time_event_data *te_data = data; + struct iwl_time_event_notif *resp; + int resp_len = iwl_rx_packet_payload_len(pkt); + + if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_NOTIFICATION)) + return true; + + if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { + IWL_ERR(mvm, "Invalid TIME_EVENT_NOTIFICATION response\n"); + return true; + } + + resp = (void *)pkt->data; + + /* te_data->uid is already set in the TIME_EVENT_CMD response */ + if (le32_to_cpu(resp->unique_id) != te_data->uid) + return false; + + IWL_DEBUG_TE(mvm, "TIME_EVENT_NOTIFICATION response - UID = 0x%x\n", + te_data->uid); + if (!resp->status) + IWL_ERR(mvm, + "TIME_EVENT_NOTIFICATION received but not executed\n"); + + return true; +} + +static bool iwl_mvm_time_event_response(struct iwl_notif_wait_data *notif_wait, + struct iwl_rx_packet *pkt, void *data) +{ + struct iwl_mvm *mvm = + container_of(notif_wait, struct iwl_mvm, notif_wait); + struct iwl_mvm_time_event_data *te_data = data; + struct iwl_time_event_resp *resp; + int resp_len = iwl_rx_packet_payload_len(pkt); + + if (WARN_ON(pkt->hdr.cmd != TIME_EVENT_CMD)) + return true; + + if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { + IWL_ERR(mvm, "Invalid TIME_EVENT_CMD response\n"); + return true; + } + + resp = (void *)pkt->data; + + /* we should never get a response to another TIME_EVENT_CMD here */ + if (WARN_ON_ONCE(le32_to_cpu(resp->id) != te_data->id)) + return false; + + te_data->uid = le32_to_cpu(resp->unique_id); + IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n", + te_data->uid); + return true; +} + +static int iwl_mvm_time_event_send_add(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + struct iwl_mvm_time_event_data *te_data, + struct iwl_time_event_cmd *te_cmd) +{ + static const u16 time_event_response[] = { TIME_EVENT_CMD }; + struct iwl_notification_wait wait_time_event; + int ret; + + lockdep_assert_held(&mvm->mutex); + + IWL_DEBUG_TE(mvm, "Add new TE, duration %d TU\n", + le32_to_cpu(te_cmd->duration)); + + spin_lock_bh(&mvm->time_event_lock); + if (WARN_ON(te_data->id != TE_MAX)) { + spin_unlock_bh(&mvm->time_event_lock); + return -EIO; + } + te_data->vif = vif; + te_data->duration = le32_to_cpu(te_cmd->duration); + te_data->id = le32_to_cpu(te_cmd->id); + list_add_tail(&te_data->list, &mvm->time_event_list); + spin_unlock_bh(&mvm->time_event_lock); + + /* + * Use a notification wait, which really just processes the + * command response and doesn't wait for anything, in order + * to be able to process the response and get the UID inside + * the RX path. Using CMD_WANT_SKB doesn't work because it + * stores the buffer and then wakes up this thread, by which + * time another notification (that the time event started) + * might already be processed unsuccessfully. + */ + iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event, + time_event_response, + ARRAY_SIZE(time_event_response), + iwl_mvm_time_event_response, te_data); + + ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, + sizeof(*te_cmd), te_cmd); + if (ret) { + IWL_ERR(mvm, "Couldn't send TIME_EVENT_CMD: %d\n", ret); + iwl_remove_notification(&mvm->notif_wait, &wait_time_event); + goto out_clear_te; + } + + /* No need to wait for anything, so just pass 1 (0 isn't valid) */ + ret = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1); + /* should never fail */ + WARN_ON_ONCE(ret); + + if (ret) { + out_clear_te: + spin_lock_bh(&mvm->time_event_lock); + iwl_mvm_te_clear_data(mvm, te_data); + spin_unlock_bh(&mvm->time_event_lock); + } + return ret; +} + +void iwl_mvm_protect_session(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + u32 duration, u32 min_duration, + u32 max_delay, bool wait_for_notif) +{ + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; + const u16 te_notif_response[] = { TIME_EVENT_NOTIFICATION }; + struct iwl_notification_wait wait_te_notif; + struct iwl_time_event_cmd time_cmd = {}; + + lockdep_assert_held(&mvm->mutex); + + if (te_data->running && + time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) { + IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n", + jiffies_to_msecs(te_data->end_jiffies - jiffies)); + return; + } + + if (te_data->running) { + IWL_DEBUG_TE(mvm, "extend 0x%x: only %u ms left\n", + te_data->uid, + jiffies_to_msecs(te_data->end_jiffies - jiffies)); + /* + * we don't have enough time + * cancel the current TE and issue a new one + * Of course it would be better to remove the old one only + * when the new one is added, but we don't care if we are off + * channel for a bit. All we need to do, is not to return + * before we actually begin to be on the channel. + */ + iwl_mvm_stop_session_protection(mvm, vif); + } + + time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); + time_cmd.id_and_color = + cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); + time_cmd.id = cpu_to_le32(TE_BSS_STA_AGGRESSIVE_ASSOC); + + time_cmd.apply_time = cpu_to_le32(0); + + time_cmd.max_frags = TE_V2_FRAG_NONE; + time_cmd.max_delay = cpu_to_le32(max_delay); + /* TODO: why do we need to interval = bi if it is not periodic? */ + time_cmd.interval = cpu_to_le32(1); + time_cmd.duration = cpu_to_le32(duration); + time_cmd.repeat = 1; + time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | + TE_V2_NOTIF_HOST_EVENT_END | + TE_V2_START_IMMEDIATELY); + + if (!wait_for_notif) { + iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); + return; + } + + /* + * Create notification_wait for the TIME_EVENT_NOTIFICATION to use + * right after we send the time event + */ + iwl_init_notification_wait(&mvm->notif_wait, &wait_te_notif, + te_notif_response, + ARRAY_SIZE(te_notif_response), + iwl_mvm_te_notif, te_data); + + /* If TE was sent OK - wait for the notification that started */ + if (iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd)) { + IWL_ERR(mvm, "Failed to add TE to protect session\n"); + iwl_remove_notification(&mvm->notif_wait, &wait_te_notif); + } else if (iwl_wait_notification(&mvm->notif_wait, &wait_te_notif, + TU_TO_JIFFIES(max_delay))) { + IWL_ERR(mvm, "Failed to protect session until TE\n"); + } +} + +/* Determine whether mac or link id should be used, and validate the link id */ +static int iwl_mvm_get_session_prot_id(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + s8 link_id) +{ + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + int ver = iwl_fw_lookup_cmd_ver(mvm->fw, + WIDE_ID(MAC_CONF_GROUP, + SESSION_PROTECTION_CMD), 1); + + if (ver < 2) + return mvmvif->id; + + if (WARN(link_id < 0 || !mvmvif->link[link_id], + "Invalid link ID for session protection: %u\n", link_id)) + return -EINVAL; + + if (WARN(!mvmvif->link[link_id]->active, + "Session Protection on an inactive link: %u\n", link_id)) + return -EINVAL; + + return mvmvif->link[link_id]->fw_link_id; +} + +static void iwl_mvm_cancel_session_protection(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + u32 id, s8 link_id) +{ + int mac_link_id = iwl_mvm_get_session_prot_id(mvm, vif, link_id); + struct iwl_session_prot_cmd cmd = { + .id_and_color = cpu_to_le32(mac_link_id), + .action = cpu_to_le32(FW_CTXT_ACTION_REMOVE), + .conf_id = cpu_to_le32(id), + }; + int ret; + + if (mac_link_id < 0) + return; + + ret = iwl_mvm_send_cmd_pdu(mvm, + WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD), + 0, sizeof(cmd), &cmd); + if (ret) + IWL_ERR(mvm, + "Couldn't send the SESSION_PROTECTION_CMD: %d\n", ret); +} + +static void iwl_mvm_roc_rm_cmd(struct iwl_mvm *mvm, u32 activity) +{ + struct iwl_roc_req roc_cmd = { + .action = cpu_to_le32(FW_CTXT_ACTION_REMOVE), + .activity = cpu_to_le32(activity), + }; + u8 ver = iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(MAC_CONF_GROUP, ROC_CMD), 0); + u16 cmd_len = ver < 6 ? sizeof(struct iwl_roc_req_v5) : sizeof(roc_cmd); + int ret; + + lockdep_assert_held(&mvm->mutex); + ret = iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(MAC_CONF_GROUP, ROC_CMD), 0, + cmd_len, &roc_cmd); + if (ret) + IWL_ERR(mvm, "Couldn't send the ROC_CMD: %d\n", ret); +} + +static bool __iwl_mvm_remove_time_event(struct iwl_mvm *mvm, + struct iwl_mvm_time_event_data *te_data, + u32 *uid) +{ + u32 id; + struct ieee80211_vif *vif = te_data->vif; + struct iwl_mvm_vif *mvmvif; + enum nl80211_iftype iftype; + s8 link_id; + bool p2p_aux = iwl_mvm_has_p2p_over_aux(mvm); + u8 roc_ver = iwl_fw_lookup_cmd_ver(mvm->fw, + WIDE_ID(MAC_CONF_GROUP, ROC_CMD), 0); + + if (!vif) + return false; + + mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); + iftype = te_data->vif->type; + + /* + * It is possible that by the time we got to this point the time + * event was already removed. + */ + spin_lock_bh(&mvm->time_event_lock); + + /* Save time event uid before clearing its data */ + *uid = te_data->uid; + id = te_data->id; + link_id = te_data->link_id; + + /* + * The clear_data function handles time events that were already removed + */ + iwl_mvm_te_clear_data(mvm, te_data); + spin_unlock_bh(&mvm->time_event_lock); + + if ((p2p_aux && iftype == NL80211_IFTYPE_P2P_DEVICE) || + (roc_ver >= 3 && mvmvif->roc_activity == ROC_ACTIVITY_HOTSPOT)) { + if (mvmvif->roc_activity < ROC_NUM_ACTIVITIES) { + iwl_mvm_roc_rm_cmd(mvm, mvmvif->roc_activity); + mvmvif->roc_activity = ROC_NUM_ACTIVITIES; + iwl_mvm_roc_finished(mvm); + } + return false; + } else if (fw_has_capa(&mvm->fw->ucode_capa, + IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD) && + id != HOT_SPOT_CMD) { + /* When session protection is used, the te_data->id field + * is reused to save session protection's configuration. + * For AUX ROC, HOT_SPOT_CMD is used and the te_data->id + * field is set to HOT_SPOT_CMD. + */ + if (mvmvif && id < SESSION_PROTECT_CONF_MAX_ID) { + /* Session protection is still ongoing. Cancel it */ + iwl_mvm_cancel_session_protection(mvm, vif, id, + link_id); + if (iftype == NL80211_IFTYPE_P2P_DEVICE) { + iwl_mvm_roc_finished(mvm); + } + } + return false; + } else { + /* It is possible that by the time we try to remove it, the + * time event has already ended and removed. In such a case + * there is no need to send a removal command. + */ + if (id == TE_MAX) { + IWL_DEBUG_TE(mvm, "TE 0x%x has already ended\n", *uid); + return false; + } + } + + return true; +} + +/* + * Explicit request to remove a aux roc time event. The removal of a time + * event needs to be synchronized with the flow of a time event's end + * notification, which also removes the time event from the op mode + * data structures. + */ +static void iwl_mvm_remove_aux_roc_te(struct iwl_mvm *mvm, + struct iwl_mvm_vif *mvmvif, + struct iwl_mvm_time_event_data *te_data) +{ + struct iwl_hs20_roc_req aux_cmd = {}; + u16 len = sizeof(aux_cmd) - iwl_mvm_chan_info_padding(mvm); + + u32 uid; + int ret; + + if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid)) + return; + + aux_cmd.event_unique_id = cpu_to_le32(uid); + aux_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); + aux_cmd.id_and_color = + cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); + IWL_DEBUG_TE(mvm, "Removing BSS AUX ROC TE 0x%x\n", + le32_to_cpu(aux_cmd.event_unique_id)); + ret = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, + len, &aux_cmd); + + if (WARN_ON(ret)) + return; +} + +/* + * Explicit request to remove a time event. The removal of a time event needs to + * be synchronized with the flow of a time event's end notification, which also + * removes the time event from the op mode data structures. + */ +void iwl_mvm_remove_time_event(struct iwl_mvm *mvm, + struct iwl_mvm_vif *mvmvif, + struct iwl_mvm_time_event_data *te_data) +{ + struct iwl_time_event_cmd time_cmd = {}; + u32 uid; + int ret; + + if (!__iwl_mvm_remove_time_event(mvm, te_data, &uid)) + return; + + /* When we remove a TE, the UID is to be set in the id field */ + time_cmd.id = cpu_to_le32(uid); + time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE); + time_cmd.id_and_color = + cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); + + IWL_DEBUG_TE(mvm, "Removing TE 0x%x\n", le32_to_cpu(time_cmd.id)); + ret = iwl_mvm_send_cmd_pdu(mvm, TIME_EVENT_CMD, 0, + sizeof(time_cmd), &time_cmd); + if (ret) + IWL_ERR(mvm, "Couldn't remove the time event\n"); +} + +void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm, + struct ieee80211_vif *vif) +{ + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; + u32 id; + + lockdep_assert_held(&mvm->mutex); + + spin_lock_bh(&mvm->time_event_lock); + id = te_data->id; + spin_unlock_bh(&mvm->time_event_lock); + + if (fw_has_capa(&mvm->fw->ucode_capa, + IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD)) { + if (id != SESSION_PROTECT_CONF_ASSOC) { + IWL_DEBUG_TE(mvm, + "don't remove session protection id=%u\n", + id); + return; + } + } else if (id != TE_BSS_STA_AGGRESSIVE_ASSOC) { + IWL_DEBUG_TE(mvm, + "don't remove TE with id=%u (not session protection)\n", + id); + return; + } + + iwl_mvm_remove_time_event(mvm, mvmvif, te_data); +} + +void iwl_mvm_rx_session_protect_notif(struct iwl_mvm *mvm, + struct iwl_rx_cmd_buffer *rxb) +{ + struct iwl_rx_packet *pkt = rxb_addr(rxb); + struct iwl_session_prot_notif *notif = (void *)pkt->data; + int id = le32_to_cpu(notif->mac_link_id); + struct ieee80211_vif *vif; + struct iwl_mvm_vif *mvmvif; + + rcu_read_lock(); + + /* note we use link ID == MAC ID */ + vif = iwl_mvm_rcu_dereference_vif_id(mvm, id, true); + if (!vif) + goto out_unlock; + + mvmvif = iwl_mvm_vif_from_mac80211(vif); + + /* The vif is not a P2P_DEVICE, maintain its time_event_data */ + if (vif->type != NL80211_IFTYPE_P2P_DEVICE) { + struct iwl_mvm_time_event_data *te_data = + &mvmvif->time_event_data; + + if (!le32_to_cpu(notif->status)) { + iwl_mvm_te_check_disconnect(mvm, vif, + "Session protection failure"); + spin_lock_bh(&mvm->time_event_lock); + iwl_mvm_te_clear_data(mvm, te_data); + spin_unlock_bh(&mvm->time_event_lock); + } + + if (le32_to_cpu(notif->start)) { + spin_lock_bh(&mvm->time_event_lock); + te_data->running = le32_to_cpu(notif->start); + te_data->end_jiffies = + TU_TO_EXP_TIME(te_data->duration); + spin_unlock_bh(&mvm->time_event_lock); + } else { + /* + * By now, we should have finished association + * and know the dtim period. + */ + iwl_mvm_te_check_disconnect(mvm, vif, + !vif->cfg.assoc ? + "Not associated and the session protection is over already..." : + "No beacon heard and the session protection is over already..."); + spin_lock_bh(&mvm->time_event_lock); + iwl_mvm_te_clear_data(mvm, te_data); + spin_unlock_bh(&mvm->time_event_lock); + } + + goto out_unlock; + } + + if (!le32_to_cpu(notif->status) || !le32_to_cpu(notif->start)) { + /* End TE, notify mac80211 */ + mvmvif->time_event_data.id = SESSION_PROTECT_CONF_MAX_ID; + mvmvif->time_event_data.link_id = -1; + /* set the bit so the ROC cleanup will actually clean up */ + set_bit(IWL_MVM_STATUS_ROC_P2P_RUNNING, &mvm->status); + iwl_mvm_roc_finished(mvm); + ieee80211_remain_on_channel_expired(mvm->hw); + } else if (le32_to_cpu(notif->start)) { + if (WARN_ON(mvmvif->time_event_data.id != + le32_to_cpu(notif->conf_id))) + goto out_unlock; + set_bit(IWL_MVM_STATUS_ROC_P2P_RUNNING, &mvm->status); + ieee80211_ready_on_channel(mvm->hw); /* Start TE */ + } + + out_unlock: + rcu_read_unlock(); +} + +#define AUX_ROC_MIN_DURATION MSEC_TO_TU(100) +#define AUX_ROC_MIN_DELAY MSEC_TO_TU(200) +#define AUX_ROC_MAX_DELAY MSEC_TO_TU(600) +#define AUX_ROC_SAFETY_BUFFER MSEC_TO_TU(20) +#define AUX_ROC_MIN_SAFETY_BUFFER MSEC_TO_TU(10) + +void iwl_mvm_roc_duration_and_delay(struct ieee80211_vif *vif, + u32 duration_ms, + u32 *duration_tu, + u32 *delay) +{ + struct ieee80211_bss_conf *link_conf; + unsigned int link_id; + u32 dtim_interval = 0; + + *delay = AUX_ROC_MIN_DELAY; + *duration_tu = MSEC_TO_TU(duration_ms); + + rcu_read_lock(); + for_each_vif_active_link(vif, link_conf, link_id) { + dtim_interval = + max_t(u32, dtim_interval, + link_conf->dtim_period * link_conf->beacon_int); + } + rcu_read_unlock(); + + /* + * If we are associated we want the delay time to be at least one + * dtim interval so that the FW can wait until after the DTIM and + * then start the time event, this will potentially allow us to + * remain off-channel for the max duration. + * Since we want to use almost a whole dtim interval we would also + * like the delay to be for 2-3 dtim intervals, in case there are + * other time events with higher priority. + * dtim_interval should never be 0, it can be 1 if we don't know it + * (we haven't heard any beacon yet). + */ + if (vif->cfg.assoc && !WARN_ON(!dtim_interval)) { + *delay = min_t(u32, dtim_interval * 3, AUX_ROC_MAX_DELAY); + /* We cannot remain off-channel longer than the DTIM interval */ + if (dtim_interval <= *duration_tu) { + *duration_tu = dtim_interval - AUX_ROC_SAFETY_BUFFER; + if (*duration_tu <= AUX_ROC_MIN_DURATION) + *duration_tu = dtim_interval - + AUX_ROC_MIN_SAFETY_BUFFER; + } + } +} + +int iwl_mvm_roc_add_cmd(struct iwl_mvm *mvm, + struct ieee80211_channel *channel, + struct ieee80211_vif *vif, + int duration, enum iwl_roc_activity activity) +{ + int res; + u32 duration_tu, delay; + struct iwl_roc_req roc_req = { + .action = cpu_to_le32(FW_CTXT_ACTION_ADD), + .activity = cpu_to_le32(activity), + .sta_id = cpu_to_le32(mvm->aux_sta.sta_id), + }; + u8 ver = iwl_fw_lookup_cmd_ver(mvm->fw, WIDE_ID(MAC_CONF_GROUP, ROC_CMD), 0); + u16 cmd_len = ver < 6 ? sizeof(struct iwl_roc_req_v5) : sizeof(roc_req); + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + + lockdep_assert_held(&mvm->mutex); + + if (WARN_ON(mvmvif->roc_activity != ROC_NUM_ACTIVITIES)) + return -EBUSY; + + /* Set the channel info data */ + iwl_mvm_set_chan_info(mvm, &roc_req.channel_info, + channel->hw_value, + iwl_mvm_phy_band_from_nl80211(channel->band), + IWL_PHY_CHANNEL_MODE20, 0); + + iwl_mvm_roc_duration_and_delay(vif, duration, &duration_tu, + &delay); + roc_req.duration = cpu_to_le32(duration_tu); + roc_req.max_delay = cpu_to_le32(delay); + + IWL_DEBUG_TE(mvm, + "\t(requested = %ums, max_delay = %ums)\n", + duration, delay); + IWL_DEBUG_TE(mvm, + "Requesting to remain on channel %u for %utu. activity %u\n", + channel->hw_value, duration_tu, activity); + + /* Set the node address */ + memcpy(roc_req.node_addr, vif->addr, ETH_ALEN); + + res = iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(MAC_CONF_GROUP, ROC_CMD), + 0, cmd_len, &roc_req); + if (!res) + mvmvif->roc_activity = activity; + + return res; +} + +static int +iwl_mvm_start_p2p_roc_session_protection(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + int duration, + enum ieee80211_roc_type type) +{ + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + struct iwl_session_prot_cmd cmd = { + .id_and_color = + cpu_to_le32(iwl_mvm_get_session_prot_id(mvm, vif, 0)), + .action = cpu_to_le32(FW_CTXT_ACTION_ADD), + .duration_tu = cpu_to_le32(MSEC_TO_TU(duration)), + }; + + lockdep_assert_held(&mvm->mutex); + + /* The time_event_data.id field is reused to save session + * protection's configuration. + */ + + mvmvif->time_event_data.link_id = 0; + + switch (type) { + case IEEE80211_ROC_TYPE_NORMAL: + mvmvif->time_event_data.id = + SESSION_PROTECT_CONF_P2P_DEVICE_DISCOV; + break; + case IEEE80211_ROC_TYPE_MGMT_TX: + mvmvif->time_event_data.id = + SESSION_PROTECT_CONF_P2P_GO_NEGOTIATION; + break; + default: + WARN_ONCE(1, "Got an invalid ROC type\n"); + return -EINVAL; + } + + cmd.conf_id = cpu_to_le32(mvmvif->time_event_data.id); + return iwl_mvm_send_cmd_pdu(mvm, + WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD), + 0, sizeof(cmd), &cmd); +} + +int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif, + int duration, enum ieee80211_roc_type type) +{ + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; + struct iwl_time_event_cmd time_cmd = {}; + + lockdep_assert_held(&mvm->mutex); + if (te_data->running) { + IWL_WARN(mvm, "P2P_DEVICE remain on channel already running\n"); + return -EBUSY; + } + + if (fw_has_capa(&mvm->fw->ucode_capa, + IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD)) + return iwl_mvm_start_p2p_roc_session_protection(mvm, vif, + duration, + type); + + time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); + time_cmd.id_and_color = + cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); + + switch (type) { + case IEEE80211_ROC_TYPE_NORMAL: + time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_NORMAL); + break; + case IEEE80211_ROC_TYPE_MGMT_TX: + time_cmd.id = cpu_to_le32(IWL_MVM_ROC_TE_TYPE_MGMT_TX); + break; + default: + WARN_ONCE(1, "Got an invalid ROC type\n"); + return -EINVAL; + } + + time_cmd.apply_time = cpu_to_le32(0); + time_cmd.interval = cpu_to_le32(1); + + /* + * The P2P Device TEs can have lower priority than other events + * that are being scheduled by the driver/fw, and thus it might not be + * scheduled. To improve the chances of it being scheduled, allow them + * to be fragmented, and in addition allow them to be delayed. + */ + time_cmd.max_frags = min(MSEC_TO_TU(duration)/50, TE_V2_FRAG_ENDLESS); + time_cmd.max_delay = cpu_to_le32(MSEC_TO_TU(duration/2)); + time_cmd.duration = cpu_to_le32(MSEC_TO_TU(duration)); + time_cmd.repeat = 1; + time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | + TE_V2_NOTIF_HOST_EVENT_END | + TE_V2_START_IMMEDIATELY); + + return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); +} + +static struct iwl_mvm_time_event_data *iwl_mvm_get_roc_te(struct iwl_mvm *mvm) +{ + struct iwl_mvm_time_event_data *te_data; + + lockdep_assert_held(&mvm->mutex); + + spin_lock_bh(&mvm->time_event_lock); + + /* + * Iterate over the list of time events and find the time event that is + * associated with a P2P_DEVICE interface. + * This assumes that a P2P_DEVICE interface can have only a single time + * event at any given time and this time event coresponds to a ROC + * request + */ + list_for_each_entry(te_data, &mvm->time_event_list, list) { + if (te_data->vif->type == NL80211_IFTYPE_P2P_DEVICE) + goto out; + } + + /* There can only be at most one AUX ROC time event, we just use the + * list to simplify/unify code. Remove it if it exists. + */ + te_data = list_first_entry_or_null(&mvm->aux_roc_te_list, + struct iwl_mvm_time_event_data, + list); +out: + spin_unlock_bh(&mvm->time_event_lock); + return te_data; +} + +void iwl_mvm_cleanup_roc_te(struct iwl_mvm *mvm) +{ + struct iwl_mvm_time_event_data *te_data; + u32 uid; + + te_data = iwl_mvm_get_roc_te(mvm); + if (te_data) + __iwl_mvm_remove_time_event(mvm, te_data, &uid); +} + +void iwl_mvm_stop_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif) +{ + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + struct iwl_mvm_time_event_data *te_data; + bool p2p_aux = iwl_mvm_has_p2p_over_aux(mvm); + u8 roc_ver = iwl_fw_lookup_cmd_ver(mvm->fw, + WIDE_ID(MAC_CONF_GROUP, ROC_CMD), 0); + int iftype = vif->type; + + mutex_lock(&mvm->mutex); + + if (p2p_aux || (roc_ver >= 3 && iftype != NL80211_IFTYPE_P2P_DEVICE)) { + if (mvmvif->roc_activity < ROC_NUM_ACTIVITIES) { + iwl_mvm_roc_rm_cmd(mvm, mvmvif->roc_activity); + mvmvif->roc_activity = ROC_NUM_ACTIVITIES; + } + goto cleanup_roc; + } else if (fw_has_capa(&mvm->fw->ucode_capa, + IWL_UCODE_TLV_CAPA_SESSION_PROT_CMD)) { + te_data = &mvmvif->time_event_data; + + if (iftype == NL80211_IFTYPE_P2P_DEVICE) { + if (te_data->id >= SESSION_PROTECT_CONF_MAX_ID) { + IWL_DEBUG_TE(mvm, + "No remain on channel event\n"); + mutex_unlock(&mvm->mutex); + return; + } + iwl_mvm_cancel_session_protection(mvm, vif, + te_data->id, + te_data->link_id); + } else { + iwl_mvm_remove_aux_roc_te(mvm, mvmvif, + &mvmvif->hs_time_event_data); + } + goto cleanup_roc; + } + + te_data = iwl_mvm_get_roc_te(mvm); + if (!te_data) { + IWL_WARN(mvm, "No remain on channel event\n"); + mutex_unlock(&mvm->mutex); + return; + } + + mvmvif = iwl_mvm_vif_from_mac80211(te_data->vif); + iftype = te_data->vif->type; + if (iftype == NL80211_IFTYPE_P2P_DEVICE) + iwl_mvm_remove_time_event(mvm, mvmvif, te_data); + else + iwl_mvm_remove_aux_roc_te(mvm, mvmvif, te_data); + +cleanup_roc: + /* + * In case we get here before the ROC event started, + * (so the status bit isn't set) set it here so iwl_mvm_cleanup_roc will + * cleanup things properly + */ + if (p2p_aux || iftype != NL80211_IFTYPE_P2P_DEVICE) + set_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status); + else + set_bit(IWL_MVM_STATUS_ROC_P2P_RUNNING, &mvm->status); + + /* Mutex is released inside this function */ + iwl_mvm_cleanup_roc(mvm); +} + +void iwl_mvm_remove_csa_period(struct iwl_mvm *mvm, + struct ieee80211_vif *vif) +{ + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; + u32 id; + + lockdep_assert_held(&mvm->mutex); + + spin_lock_bh(&mvm->time_event_lock); + id = te_data->id; + spin_unlock_bh(&mvm->time_event_lock); + + if (id != TE_CHANNEL_SWITCH_PERIOD) + return; + + iwl_mvm_remove_time_event(mvm, mvmvif, te_data); +} + +int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + u32 duration, u32 apply_time) +{ + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; + struct iwl_time_event_cmd time_cmd = {}; + + lockdep_assert_held(&mvm->mutex); + + if (te_data->running) { + u32 id; + + spin_lock_bh(&mvm->time_event_lock); + id = te_data->id; + spin_unlock_bh(&mvm->time_event_lock); + + if (id == TE_CHANNEL_SWITCH_PERIOD) { + IWL_DEBUG_TE(mvm, "CS period is already scheduled\n"); + return -EBUSY; + } + + /* + * Remove the session protection time event to allow the + * channel switch. If we got here, we just heard a beacon so + * the session protection is not needed anymore anyway. + */ + iwl_mvm_remove_time_event(mvm, mvmvif, te_data); + } + + time_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); + time_cmd.id_and_color = + cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, mvmvif->color)); + time_cmd.id = cpu_to_le32(TE_CHANNEL_SWITCH_PERIOD); + time_cmd.apply_time = cpu_to_le32(apply_time); + time_cmd.max_frags = TE_V2_FRAG_NONE; + time_cmd.duration = cpu_to_le32(duration); + time_cmd.repeat = 1; + time_cmd.interval = cpu_to_le32(1); + time_cmd.policy = cpu_to_le16(TE_V2_NOTIF_HOST_EVENT_START | + TE_V2_ABSENCE); + if (!apply_time) + time_cmd.policy |= cpu_to_le16(TE_V2_START_IMMEDIATELY); + + return iwl_mvm_time_event_send_add(mvm, vif, te_data, &time_cmd); +} + +static bool iwl_mvm_session_prot_notif(struct iwl_notif_wait_data *notif_wait, + struct iwl_rx_packet *pkt, void *data) +{ + struct iwl_mvm *mvm = + container_of(notif_wait, struct iwl_mvm, notif_wait); + struct iwl_session_prot_notif *resp; + int resp_len = iwl_rx_packet_payload_len(pkt); + + if (WARN_ON(pkt->hdr.cmd != SESSION_PROTECTION_NOTIF || + pkt->hdr.group_id != MAC_CONF_GROUP)) + return true; + + if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { + IWL_ERR(mvm, "Invalid SESSION_PROTECTION_NOTIF response\n"); + return true; + } + + resp = (void *)pkt->data; + + if (!resp->status) + IWL_ERR(mvm, + "TIME_EVENT_NOTIFICATION received but not executed\n"); + + return true; +} + +void iwl_mvm_schedule_session_protection(struct iwl_mvm *mvm, + struct ieee80211_vif *vif, + u32 duration, u32 min_duration, + bool wait_for_notif, + unsigned int link_id) +{ + struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); + struct iwl_mvm_time_event_data *te_data = &mvmvif->time_event_data; + const u16 notif[] = { WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_NOTIF) }; + struct iwl_notification_wait wait_notif; + int mac_link_id = iwl_mvm_get_session_prot_id(mvm, vif, (s8)link_id); + struct iwl_session_prot_cmd cmd = { + .id_and_color = cpu_to_le32(mac_link_id), + .action = cpu_to_le32(FW_CTXT_ACTION_ADD), + .conf_id = cpu_to_le32(SESSION_PROTECT_CONF_ASSOC), + .duration_tu = cpu_to_le32(MSEC_TO_TU(duration)), + }; + + if (mac_link_id < 0) + return; + + lockdep_assert_held(&mvm->mutex); + + spin_lock_bh(&mvm->time_event_lock); + if (te_data->running && te_data->link_id == link_id && + time_after(te_data->end_jiffies, TU_TO_EXP_TIME(min_duration))) { + IWL_DEBUG_TE(mvm, "We have enough time in the current TE: %u\n", + jiffies_to_msecs(te_data->end_jiffies - jiffies)); + spin_unlock_bh(&mvm->time_event_lock); + + return; + } + + iwl_mvm_te_clear_data(mvm, te_data); + /* + * The time_event_data.id field is reused to save session + * protection's configuration. + */ + te_data->id = le32_to_cpu(cmd.conf_id); + te_data->duration = le32_to_cpu(cmd.duration_tu); + te_data->vif = vif; + te_data->link_id = link_id; + spin_unlock_bh(&mvm->time_event_lock); + + IWL_DEBUG_TE(mvm, "Add new session protection, duration %d TU\n", + le32_to_cpu(cmd.duration_tu)); + + if (!wait_for_notif) { + if (iwl_mvm_send_cmd_pdu(mvm, + WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD), + 0, sizeof(cmd), &cmd)) { + goto send_cmd_err; + } + + return; + } + + iwl_init_notification_wait(&mvm->notif_wait, &wait_notif, + notif, ARRAY_SIZE(notif), + iwl_mvm_session_prot_notif, NULL); + + if (iwl_mvm_send_cmd_pdu(mvm, + WIDE_ID(MAC_CONF_GROUP, SESSION_PROTECTION_CMD), + 0, sizeof(cmd), &cmd)) { + iwl_remove_notification(&mvm->notif_wait, &wait_notif); + goto send_cmd_err; + } else if (iwl_wait_notification(&mvm->notif_wait, &wait_notif, + TU_TO_JIFFIES(100))) { + IWL_ERR(mvm, + "Failed to protect session until session protection\n"); + } + return; + +send_cmd_err: + IWL_ERR(mvm, + "Couldn't send the SESSION_PROTECTION_CMD\n"); + spin_lock_bh(&mvm->time_event_lock); + iwl_mvm_te_clear_data(mvm, te_data); + spin_unlock_bh(&mvm->time_event_lock); +} |