From 03dd4cb26d967f9588437b0fc9cc0e8353322bb7 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Fri, 25 Mar 2016 03:53:42 -0300 Subject: Linux-libre 4.5-gnu --- drivers/net/wireless/iwlwifi/mvm/sta.h | 426 --------------------------------- 1 file changed, 426 deletions(-) delete mode 100644 drivers/net/wireless/iwlwifi/mvm/sta.h (limited to 'drivers/net/wireless/iwlwifi/mvm/sta.h') diff --git a/drivers/net/wireless/iwlwifi/mvm/sta.h b/drivers/net/wireless/iwlwifi/mvm/sta.h deleted file mode 100644 index 0631cc0a6..000000000 --- a/drivers/net/wireless/iwlwifi/mvm/sta.h +++ /dev/null @@ -1,426 +0,0 @@ -/****************************************************************************** - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, - * USA - * - * The full GNU General Public License is included in this distribution - * in the file called COPYING. - * - * Contact Information: - * Intel Linux Wireless - * 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 - * modification, are permitted provided that the following conditions - * are met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * * Neither the name Intel Corporation nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - *****************************************************************************/ - -#ifndef __sta_h__ -#define __sta_h__ - -#include -#include -#include - -#include "iwl-trans.h" /* for IWL_MAX_TID_COUNT */ -#include "fw-api.h" /* IWL_MVM_STATION_COUNT */ -#include "rs.h" - -struct iwl_mvm; -struct iwl_mvm_vif; - -/** - * DOC: station table - introduction - * - * The station table is a list of data structure that reprensent the stations. - * In STA/P2P client mode, the driver will hold one station for the AP/ GO. - * In GO/AP mode, the driver will have as many stations as associated clients. - * All these stations are reflected in the fw's station table. The driver - * keeps the fw's station table up to date with the ADD_STA command. Stations - * can be removed by the REMOVE_STA command. - * - * All the data related to a station is held in the structure %iwl_mvm_sta - * which is embed in the mac80211's %ieee80211_sta (in the drv_priv) area. - * This data includes the index of the station in the fw, per tid information - * (sequence numbers, Block-ack state machine, etc...). The stations are - * created and deleted by the %sta_state callback from %ieee80211_ops. - * - * The driver holds a map: %fw_id_to_mac_id that allows to fetch a - * %ieee80211_sta (and the %iwl_mvm_sta embedded into it) based on a fw - * station index. That way, the driver is able to get the tid related data in - * O(1) in time sensitive paths (Tx / Tx response / BA notification). These - * paths are triggered by the fw, and the driver needs to get a pointer to the - * %ieee80211 structure. This map helps to get that pointer quickly. - */ - -/** - * DOC: station table - locking - * - * As stated before, the station is created / deleted by mac80211's %sta_state - * callback from %ieee80211_ops which can sleep. The next paragraph explains - * the locking of a single stations, the next ones relates to the station - * table. - * - * The station holds the sequence number per tid. So this data needs to be - * accessed in the Tx path (which is softIRQ). It also holds the Block-Ack - * information (the state machine / and the logic that checks if the queues - * were drained), so it also needs to be accessible from the Tx response flow. - * In short, the station needs to be access from sleepable context as well as - * from tasklets, so the station itself needs a spinlock. - * - * The writers of %fw_id_to_mac_id map are serialized by the global mutex of - * the mvm op_mode. This is possible since %sta_state can sleep. - * The pointers in this map are RCU protected, hence we won't replace the - * station while we have Tx / Tx response / BA notification running. - * - * If a station is deleted while it still has packets in its A-MPDU queues, - * then the reclaim flow will notice that there is no station in the map for - * sta_id and it will dump the responses. - */ - -/** - * DOC: station table - internal stations - * - * The FW needs a few internal stations that are not reflected in - * mac80211, such as broadcast station in AP / GO mode, or AUX sta for - * scanning and P2P device (during the GO negotiation). - * For these kind of stations we have %iwl_mvm_int_sta struct which holds the - * data relevant for them from both %iwl_mvm_sta and %ieee80211_sta. - * Usually the data for these stations is static, so no locking is required, - * and no TID data as this is also not needed. - * One thing to note, is that these stations have an ID in the fw, but not - * in mac80211. In order to "reserve" them a sta_id in %fw_id_to_mac_id - * we fill ERR_PTR(EINVAL) in this mapping and all other dereferencing of - * pointers from this mapping need to check that the value is not error - * or NULL. - * - * Currently there is only one auxiliary station for scanning, initialized - * on init. - */ - -/** - * DOC: station table - AP Station in STA mode - * - * %iwl_mvm_vif includes the index of the AP station in the fw's STA table: - * %ap_sta_id. To get the point to the corresponding %ieee80211_sta, - * &fw_id_to_mac_id can be used. Due to the way the fw works, we must not remove - * the AP station from the fw before setting the MAC context as unassociated. - * Hence, %fw_id_to_mac_id[%ap_sta_id] will be NULLed when the AP station is - * removed by mac80211, but the station won't be removed in the fw until the - * VIF is set as unassociated. Then, %ap_sta_id will be invalidated. - */ - -/** - * DOC: station table - Drain vs. Flush - * - * Flush means that all the frames in the SCD queue are dumped regardless the - * station to which they were sent. We do that when we disassociate and before - * we remove the STA of the AP. The flush can be done synchronously against the - * fw. - * Drain means that the fw will drop all the frames sent to a specific station. - * This is useful when a client (if we are IBSS / GO or AP) disassociates. In - * that case, we need to drain all the frames for that client from the AC queues - * that are shared with the other clients. Only then, we can remove the STA in - * the fw. In order to do so, we track the non-AMPDU packets for each station. - * If mac80211 removes a STA and if it still has non-AMPDU packets pending in - * the queues, we mark this station as %EBUSY in %fw_id_to_mac_id, and drop all - * the frames for this STA (%iwl_mvm_rm_sta). When the last frame is dropped - * (we know about it with its Tx response), we remove the station in fw and set - * it as %NULL in %fw_id_to_mac_id: this is the purpose of - * %iwl_mvm_sta_drained_wk. - */ - -/** - * DOC: station table - fw restart - * - * When the fw asserts, or we have any other issue that requires to reset the - * driver, we require mac80211 to reconfigure the driver. Since the private - * data of the stations is embed in mac80211's %ieee80211_sta, that data will - * not be zeroed and needs to be reinitialized manually. - * %IWL_MVM_STATUS_IN_HW_RESTART is set during restart and that will hint us - * that we must not allocate a new sta_id but reuse the previous one. This - * means that the stations being re-added after the reset will have the same - * place in the fw as before the reset. We do need to zero the %fw_id_to_mac_id - * map, since the stations aren't in the fw any more. Internal stations that - * are not added by mac80211 will be re-added in the init flow that is called - * after the restart: mac80211 call's %iwl_mvm_mac_start which calls to - * %iwl_mvm_up. - */ - -/** - * DOC: AP mode - PS - * - * When a station is asleep, the fw will set it as "asleep". All frames on - * shared queues (i.e. non-aggregation queues) to that station will be dropped - * by the fw (%TX_STATUS_FAIL_DEST_PS failure code). - * - * AMPDUs are in a separate queue that is stopped by the fw. We just need to - * let mac80211 know when there are frames in these queues so that it can - * properly handle trigger frames. - * - * When a trigger frame is received, mac80211 tells the driver to send frames - * from the AMPDU queues or sends frames to non-aggregation queues itself, - * depending on which ACs are delivery-enabled and what TID has frames to - * transmit. Note that mac80211 has all the knowledge since all the non-agg - * frames are buffered / filtered, and the driver tells mac80211 about agg - * frames). The driver needs to tell the fw to let frames out even if the - * station is asleep. This is done by %iwl_mvm_sta_modify_sleep_tx_count. - * - * When we receive a frame from that station with PM bit unset, the driver - * needs to let the fw know that this station isn't asleep any more. This is - * done by %iwl_mvm_sta_modify_ps_wake in response to mac80211 signaling the - * station's wakeup. - * - * For a GO, the Service Period might be cut short due to an absence period - * of the GO. In this (and all other cases) the firmware notifies us with the - * EOSP_NOTIFICATION, and we notify mac80211 of that. Further frames that we - * already sent to the device will be rejected again. - * - * See also "AP support for powersaving clients" in mac80211.h. - */ - -/** - * enum iwl_mvm_agg_state - * - * The state machine of the BA agreement establishment / tear down. - * These states relate to a specific RA / TID. - * - * @IWL_AGG_OFF: aggregation is not used - * @IWL_AGG_STARTING: aggregation are starting (between start and oper) - * @IWL_AGG_ON: aggregation session is up - * @IWL_EMPTYING_HW_QUEUE_ADDBA: establishing a BA session - waiting for the - * HW queue to be empty from packets for this RA /TID. - * @IWL_EMPTYING_HW_QUEUE_DELBA: tearing down a BA session - waiting for the - * HW queue to be empty from packets for this RA /TID. - */ -enum iwl_mvm_agg_state { - IWL_AGG_OFF = 0, - IWL_AGG_STARTING, - IWL_AGG_ON, - IWL_EMPTYING_HW_QUEUE_ADDBA, - IWL_EMPTYING_HW_QUEUE_DELBA, -}; - -/** - * struct iwl_mvm_tid_data - holds the states for each RA / TID - * @seq_number: the next WiFi sequence number to use - * @next_reclaimed: the WiFi sequence number of the next packet to be acked. - * This is basically (last acked packet++). - * @rate_n_flags: Rate at which Tx was attempted. Holds the data between the - * Tx response (TX_CMD), and the block ack notification (COMPRESSED_BA). - * @reduced_tpc: Reduced tx power. Holds the data between the - * Tx response (TX_CMD), and the block ack notification (COMPRESSED_BA). - * @state: state of the BA agreement establishment / tear down. - * @txq_id: Tx queue used by the BA session - * @ssn: the first packet to be sent in AGG HW queue in Tx AGG start flow, or - * the first packet to be sent in legacy HW queue in Tx AGG stop flow. - * Basically when next_reclaimed reaches ssn, we can tell mac80211 that - * we are ready to finish the Tx AGG stop / start flow. - * @tx_time: medium time consumed by this A-MPDU - */ -struct iwl_mvm_tid_data { - u16 seq_number; - u16 next_reclaimed; - /* The rest is Tx AGG related */ - u32 rate_n_flags; - u8 reduced_tpc; - enum iwl_mvm_agg_state state; - u16 txq_id; - u16 ssn; - u16 tx_time; -}; - -static inline u16 iwl_mvm_tid_queued(struct iwl_mvm_tid_data *tid_data) -{ - return ieee80211_sn_sub(IEEE80211_SEQ_TO_SN(tid_data->seq_number), - tid_data->next_reclaimed); -} - -/** - * struct iwl_mvm_sta - representation of a station in the driver - * @sta_id: the index of the station in the fw (will be replaced by id_n_color) - * @tfd_queue_msk: the tfd queues used by the station - * @hw_queue: per-AC mapping of the TFD queues used by station - * @mac_id_n_color: the MAC context this station is linked to - * @tid_disable_agg: bitmap: if bit(tid) is set, the fw won't send ampdus for - * tid. - * @max_agg_bufsize: the maximal size of the AGG buffer for this station - * @bt_reduced_txpower: is reduced tx power enabled for this station - * @next_status_eosp: the next reclaimed packet is a PS-Poll response and - * we need to signal the EOSP - * @lock: lock to protect the whole struct. Since %tid_data is access from Tx - * and from Tx response flow, it needs a spinlock. - * @tid_data: per tid data. Look at %iwl_mvm_tid_data. - * @tx_protection: reference counter for controlling the Tx protection. - * @tt_tx_protection: is thermal throttling enable Tx protection? - * @disable_tx: is tx to this STA disabled? - * @agg_tids: bitmap of tids whose status is operational aggregated (IWL_AGG_ON) - * - * When mac80211 creates a station it reserves some space (hw->sta_data_size) - * in the structure for use by driver. This structure is placed in that - * space. - * - */ -struct iwl_mvm_sta { - u32 sta_id; - u32 tfd_queue_msk; - u8 hw_queue[IEEE80211_NUM_ACS]; - u32 mac_id_n_color; - u16 tid_disable_agg; - u8 max_agg_bufsize; - bool bt_reduced_txpower; - bool next_status_eosp; - spinlock_t lock; - struct iwl_mvm_tid_data tid_data[IWL_MAX_TID_COUNT]; - struct iwl_lq_sta lq_sta; - struct ieee80211_vif *vif; - - /* Temporary, until the new TLC will control the Tx protection */ - s8 tx_protection; - bool tt_tx_protection; - - bool disable_tx; - u8 agg_tids; -}; - -static inline struct iwl_mvm_sta * -iwl_mvm_sta_from_mac80211(struct ieee80211_sta *sta) -{ - return (void *)sta->drv_priv; -} - -/** - * struct iwl_mvm_int_sta - representation of an internal station (auxiliary or - * broadcast) - * @sta_id: the index of the station in the fw (will be replaced by id_n_color) - * @tfd_queue_msk: the tfd queues used by the station - */ -struct iwl_mvm_int_sta { - u32 sta_id; - u32 tfd_queue_msk; -}; - -int iwl_mvm_sta_send_to_fw(struct iwl_mvm *mvm, struct ieee80211_sta *sta, - bool update); -int iwl_mvm_add_sta(struct iwl_mvm *mvm, - struct ieee80211_vif *vif, - struct ieee80211_sta *sta); -int iwl_mvm_update_sta(struct iwl_mvm *mvm, - struct ieee80211_vif *vif, - struct ieee80211_sta *sta); -int iwl_mvm_rm_sta(struct iwl_mvm *mvm, - struct ieee80211_vif *vif, - struct ieee80211_sta *sta); -int iwl_mvm_rm_sta_id(struct iwl_mvm *mvm, - struct ieee80211_vif *vif, - u8 sta_id); -int iwl_mvm_set_sta_key(struct iwl_mvm *mvm, - struct ieee80211_vif *vif, - struct ieee80211_sta *sta, - struct ieee80211_key_conf *keyconf, - u8 key_offset); -int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm, - struct ieee80211_vif *vif, - struct ieee80211_sta *sta, - struct ieee80211_key_conf *keyconf); - -void iwl_mvm_update_tkip_key(struct iwl_mvm *mvm, - struct ieee80211_vif *vif, - struct ieee80211_key_conf *keyconf, - struct ieee80211_sta *sta, u32 iv32, - u16 *phase1key); - -void iwl_mvm_rx_eosp_notif(struct iwl_mvm *mvm, - struct iwl_rx_cmd_buffer *rxb); - -/* AMPDU */ -int iwl_mvm_sta_rx_agg(struct iwl_mvm *mvm, struct ieee80211_sta *sta, - int tid, u16 ssn, bool start); -int iwl_mvm_sta_tx_agg_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, - struct ieee80211_sta *sta, u16 tid, u16 *ssn); -int iwl_mvm_sta_tx_agg_oper(struct iwl_mvm *mvm, struct ieee80211_vif *vif, - struct ieee80211_sta *sta, u16 tid, u8 buf_size); -int iwl_mvm_sta_tx_agg_stop(struct iwl_mvm *mvm, struct ieee80211_vif *vif, - struct ieee80211_sta *sta, u16 tid); -int iwl_mvm_sta_tx_agg_flush(struct iwl_mvm *mvm, struct ieee80211_vif *vif, - struct ieee80211_sta *sta, u16 tid); - -int iwl_mvm_add_aux_sta(struct iwl_mvm *mvm); -void iwl_mvm_del_aux_sta(struct iwl_mvm *mvm); - -int iwl_mvm_alloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif); -int iwl_mvm_send_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif); -int iwl_mvm_add_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif); -int iwl_mvm_send_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif); -int iwl_mvm_rm_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif); -void iwl_mvm_dealloc_bcast_sta(struct iwl_mvm *mvm, struct ieee80211_vif *vif); - -void iwl_mvm_sta_drained_wk(struct work_struct *wk); -void iwl_mvm_sta_modify_ps_wake(struct iwl_mvm *mvm, - struct ieee80211_sta *sta); -void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, - struct ieee80211_sta *sta, - enum ieee80211_frame_release_type reason, - u16 cnt, u16 tids, bool more_data, - bool agg); -int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, - bool drain); -void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, - struct iwl_mvm_sta *mvmsta, bool disable); -void iwl_mvm_sta_modify_disable_tx_ap(struct iwl_mvm *mvm, - struct ieee80211_sta *sta, - bool disable); -void iwl_mvm_modify_all_sta_disable_tx(struct iwl_mvm *mvm, - struct iwl_mvm_vif *mvmvif, - bool disable); -void iwl_mvm_csa_client_absent(struct iwl_mvm *mvm, struct ieee80211_vif *vif); - -#endif /* __sta_h__ */ -- cgit v1.2.3-54-g00ecf