| /****************************************************************************** |
| * |
| * This file is provided under a dual BSD/GPLv2 license. When using or |
| * redistributing this file, you may do so under either license. |
| * |
| * GPL LICENSE SUMMARY |
| * |
| * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
| * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * The full GNU General Public License is included in this distribution |
| * in the file called COPYING. |
| * |
| * Contact Information: |
| * Intel Linux Wireless <linuxwifi@intel.com> |
| * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| * |
| * BSD LICENSE |
| * |
| * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
| * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
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| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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| *****************************************************************************/ |
| |
| #ifndef __time_event_h__ |
| #define __time_event_h__ |
| |
| #include "fw-api.h" |
| |
| #include "mvm.h" |
| |
| /** |
| * DOC: Time Events - what is it? |
| * |
| * Time Events are a fw feature that allows the driver to control the presence |
| * of the device on the channel. Since the fw supports multiple channels |
| * concurrently, the fw may choose to jump to another channel at any time. |
| * In order to make sure that the fw is on a specific channel at a certain time |
| * and for a certain duration, the driver needs to issue a time event. |
| * |
| * The simplest example is for BSS association. The driver issues a time event, |
| * waits for it to start, and only then tells mac80211 that we can start the |
| * association. This way, we make sure that the association will be done |
| * smoothly and won't be interrupted by channel switch decided within the fw. |
| */ |
| |
| /** |
| * DOC: The flow against the fw |
| * |
| * When the driver needs to make sure we are in a certain channel, at a certain |
| * time and for a certain duration, it sends a Time Event. The flow against the |
| * fw goes like this: |
| * 1) Driver sends a TIME_EVENT_CMD to the fw |
| * 2) Driver gets the response for that command. This response contains the |
| * Unique ID (UID) of the event. |
| * 3) The fw sends notification when the event starts. |
| * |
| * Of course the API provides various options that allow to cover parameters |
| * of the flow. |
| * What is the duration of the event? |
| * What is the start time of the event? |
| * Is there an end-time for the event? |
| * How much can the event be delayed? |
| * Can the event be split? |
| * If yes what is the maximal number of chunks? |
| * etc... |
| */ |
| |
| /** |
| * DOC: Abstraction to the driver |
| * |
| * In order to simplify the use of time events to the rest of the driver, |
| * we abstract the use of time events. This component provides the functions |
| * needed by the driver. |
| */ |
| |
| #define IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS 600 |
| #define IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS 400 |
| |
| /** |
| * iwl_mvm_protect_session - start / extend the session protection. |
| * @mvm: the mvm component |
| * @vif: the virtual interface for which the session is issued |
| * @duration: the duration of the session in TU. |
| * @min_duration: will start a new session if the current session will end |
| * in less than min_duration. |
| * @max_delay: maximum delay before starting the time event (in TU) |
| * @wait_for_notif: true if it is required that a time event notification be |
| * waited for (that the time event has been scheduled before returning) |
| * |
| * This function can be used to start a session protection which means that the |
| * fw will stay on the channel for %duration_ms milliseconds. This function |
| * can block (sleep) until the session starts. This function can also be used |
| * to extend a currently running session. |
| * This function is meant to be used for BSS association for example, where we |
| * want to make sure that the fw stays on the channel during the association. |
| */ |
| 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); |
| |
| /** |
| * iwl_mvm_stop_session_protection - cancel the session protection. |
| * @mvm: the mvm component |
| * @vif: the virtual interface for which the session is issued |
| * |
| * This functions cancels the session protection which is an act of good |
| * citizenship. If it is not needed any more it should be canceled because |
| * the other bindings wait for the medium during that time. |
| * This funtions doesn't sleep. |
| */ |
| void iwl_mvm_stop_session_protection(struct iwl_mvm *mvm, |
| struct ieee80211_vif *vif); |
| |
| /* |
| * iwl_mvm_rx_time_event_notif - handles %TIME_EVENT_NOTIFICATION. |
| */ |
| void iwl_mvm_rx_time_event_notif(struct iwl_mvm *mvm, |
| struct iwl_rx_cmd_buffer *rxb); |
| |
| /** |
| * iwl_mvm_start_p2p_roc - start remain on channel for p2p device functionality |
| * @mvm: the mvm component |
| * @vif: the virtual interface for which the roc is requested. It is assumed |
| * that the vif type is NL80211_IFTYPE_P2P_DEVICE |
| * @duration: the requested duration in millisecond for the fw to be on the |
| * channel that is bound to the vif. |
| * @type: the remain on channel request type |
| * |
| * This function can be used to issue a remain on channel session, |
| * which means that the fw will stay in the channel for the request %duration |
| * milliseconds. The function is async, meaning that it only issues the ROC |
| * request but does not wait for it to start. Once the FW is ready to serve the |
| * ROC request, it will issue a notification to the driver that it is on the |
| * requested channel. Once the FW completes the ROC request it will issue |
| * another notification to the driver. |
| */ |
| int iwl_mvm_start_p2p_roc(struct iwl_mvm *mvm, struct ieee80211_vif *vif, |
| int duration, enum ieee80211_roc_type type); |
| |
| /** |
| * iwl_mvm_stop_roc - stop remain on channel functionality |
| * @mvm: the mvm component |
| * |
| * This function can be used to cancel an ongoing ROC session. |
| * The function is async, it will instruct the FW to stop serving the ROC |
| * session, but will not wait for the actual stopping of the session. |
| */ |
| void iwl_mvm_stop_roc(struct iwl_mvm *mvm); |
| |
| /** |
| * iwl_mvm_remove_time_event - general function to clean up of time event |
| * @mvm: the mvm component |
| * @vif: the vif to which the time event belongs |
| * @te_data: the time event data that corresponds to that time event |
| * |
| * This function can be used to cancel a time event regardless its type. |
| * It is useful for cleaning up time events running before removing an |
| * interface. |
| */ |
| void iwl_mvm_remove_time_event(struct iwl_mvm *mvm, |
| struct iwl_mvm_vif *mvmvif, |
| struct iwl_mvm_time_event_data *te_data); |
| |
| /** |
| * iwl_mvm_te_clear_data - remove time event from list |
| * @mvm: the mvm component |
| * @te_data: the time event data to remove |
| * |
| * This function is mostly internal, it is made available here only |
| * for firmware restart purposes. |
| */ |
| void iwl_mvm_te_clear_data(struct iwl_mvm *mvm, |
| struct iwl_mvm_time_event_data *te_data); |
| |
| void iwl_mvm_cleanup_roc_te(struct iwl_mvm *mvm); |
| void iwl_mvm_roc_done_wk(struct work_struct *wk); |
| |
| /** |
| * iwl_mvm_schedule_csa_period - request channel switch absence period |
| * @mvm: the mvm component |
| * @vif: the virtual interface for which the channel switch is issued |
| * @duration: the duration of the NoA in TU. |
| * @apply_time: NoA start time in GP2. |
| * |
| * This function is used to schedule NoA time event and is used to perform |
| * the channel switch flow. |
| */ |
| int iwl_mvm_schedule_csa_period(struct iwl_mvm *mvm, |
| struct ieee80211_vif *vif, |
| u32 duration, u32 apply_time); |
| |
| /** |
| * iwl_mvm_te_scheduled - check if the fw received the TE cmd |
| * @te_data: the time event data that corresponds to that time event |
| * |
| * This function returns true iff this TE is added to the fw. |
| */ |
| static inline bool |
| iwl_mvm_te_scheduled(struct iwl_mvm_time_event_data *te_data) |
| { |
| if (!te_data) |
| return false; |
| |
| return !!te_data->uid; |
| } |
| |
| #endif /* __time_event_h__ */ |
