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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright 2002-2005, Devicescape Software, Inc.
* Copyright 2013-2014 Intel Mobile Communications GmbH
* Copyright(c) 2015-2017 Intel Deutschland GmbH
*/
#ifndef STA_INFO_H
#define STA_INFO_H
#include <linux/list.h>
#include <linux/types.h>
#include <linux/if_ether.h>
#include <linux/workqueue.h>
#include <linux/average.h>
#include <linux/bitfield.h>
#include <linux/etherdevice.h>
#include <linux/rhashtable.h>
#include <linux/u64_stats_sync.h>
#include "key.h"
/**
* enum ieee80211_sta_info_flags - Stations flags
*
* These flags are used with &struct sta_info's @flags member, but
* only indirectly with set_sta_flag() and friends.
*
* @WLAN_STA_AUTH: Station is authenticated.
* @WLAN_STA_ASSOC: Station is associated.
* @WLAN_STA_PS_STA: Station is in power-save mode
* @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic.
* This bit is always checked so needs to be enabled for all stations
* when virtual port control is not in use.
* @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble
* frames.
* @WLAN_STA_WDS: Station is one of our WDS peers.
* @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
* IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next
* frame to this station is transmitted.
* @WLAN_STA_MFP: Management frame protection is used with this STA.
* @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX)
* during suspend/resume and station removal.
* @WLAN_STA_PS_DRIVER: driver requires keeping this station in
* power-save mode logically to flush frames that might still
* be in the queues
* @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping
* station in power-save mode, reply when the driver unblocks.
* @WLAN_STA_TDLS_PEER: Station is a TDLS peer.
* @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct
* packets. This means the link is enabled.
* @WLAN_STA_TDLS_INITIATOR: We are the initiator of the TDLS link with this
* station.
* @WLAN_STA_TDLS_CHAN_SWITCH: This TDLS peer supports TDLS channel-switching
* @WLAN_STA_TDLS_OFF_CHANNEL: The local STA is currently off-channel with this
* TDLS peer
* @WLAN_STA_TDLS_WIDER_BW: This TDLS peer supports working on a wider bw on
* the BSS base channel.
* @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was
* keeping station in power-save mode, reply when the driver
* unblocks the station.
* @WLAN_STA_SP: Station is in a service period, so don't try to
* reply to other uAPSD trigger frames or PS-Poll.
* @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame.
* @WLAN_STA_INSERTED: This station is inserted into the hash table.
* @WLAN_STA_RATE_CONTROL: rate control was initialized for this station.
* @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid.
* @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period.
* @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP.
* @WLAN_STA_PS_DELIVER: station woke up, but we're still blocking TX
* until pending frames are delivered
*
* @NUM_WLAN_STA_FLAGS: number of defined flags
*/
enum ieee80211_sta_info_flags {
WLAN_STA_AUTH,
WLAN_STA_ASSOC,
WLAN_STA_PS_STA,
WLAN_STA_AUTHORIZED,
WLAN_STA_SHORT_PREAMBLE,
WLAN_STA_WDS,
WLAN_STA_CLEAR_PS_FILT,
WLAN_STA_MFP,
WLAN_STA_BLOCK_BA,
WLAN_STA_PS_DRIVER,
WLAN_STA_PSPOLL,
WLAN_STA_TDLS_PEER,
WLAN_STA_TDLS_PEER_AUTH,
WLAN_STA_TDLS_INITIATOR,
WLAN_STA_TDLS_CHAN_SWITCH,
WLAN_STA_TDLS_OFF_CHANNEL,
WLAN_STA_TDLS_WIDER_BW,
WLAN_STA_UAPSD,
WLAN_STA_SP,
WLAN_STA_4ADDR_EVENT,
WLAN_STA_INSERTED,
WLAN_STA_RATE_CONTROL,
WLAN_STA_TOFFSET_KNOWN,
WLAN_STA_MPSP_OWNER,
WLAN_STA_MPSP_RECIPIENT,
WLAN_STA_PS_DELIVER,
WLAN_STA_USES_ENCRYPTION,
NUM_WLAN_STA_FLAGS,
};
#define ADDBA_RESP_INTERVAL HZ
#define HT_AGG_MAX_RETRIES 15
#define HT_AGG_BURST_RETRIES 3
#define HT_AGG_RETRIES_PERIOD (15 * HZ)
#define HT_AGG_STATE_DRV_READY 0
#define HT_AGG_STATE_RESPONSE_RECEIVED 1
#define HT_AGG_STATE_OPERATIONAL 2
#define HT_AGG_STATE_STOPPING 3
#define HT_AGG_STATE_WANT_START 4
#define HT_AGG_STATE_WANT_STOP 5
#define HT_AGG_STATE_START_CB 6
#define HT_AGG_STATE_STOP_CB 7
DECLARE_EWMA(avg_signal, 10, 8)
enum ieee80211_agg_stop_reason {
AGG_STOP_DECLINED,
AGG_STOP_LOCAL_REQUEST,
AGG_STOP_PEER_REQUEST,
AGG_STOP_DESTROY_STA,
};
/* Debugfs flags to enable/disable use of RX/TX airtime in scheduler */
#define AIRTIME_USE_TX BIT(0)
#define AIRTIME_USE_RX BIT(1)
struct airtime_info {
u64 rx_airtime;
u64 tx_airtime;
s64 deficit;
atomic_t aql_tx_pending; /* Estimated airtime for frames pending */
u32 aql_limit_low;
u32 aql_limit_high;
};
void ieee80211_sta_update_pending_airtime(struct ieee80211_local *local,
struct sta_info *sta, u8 ac,
u16 tx_airtime, bool tx_completed);
struct sta_info;
/**
* struct tid_ampdu_tx - TID aggregation information (Tx).
*
* @rcu_head: rcu head for freeing structure
* @session_timer: check if we keep Tx-ing on the TID (by timeout value)
* @addba_resp_timer: timer for peer's response to addba request
* @pending: pending frames queue -- use sta's spinlock to protect
* @sta: station we are attached to
* @dialog_token: dialog token for aggregation session
* @timeout: session timeout value to be filled in ADDBA requests
* @tid: TID number
* @state: session state (see above)
* @last_tx: jiffies of last tx activity
* @stop_initiator: initiator of a session stop
* @tx_stop: TX DelBA frame when stopping
* @buf_size: reorder buffer size at receiver
* @failed_bar_ssn: ssn of the last failed BAR tx attempt
* @bar_pending: BAR needs to be re-sent
* @amsdu: support A-MSDU withing A-MDPU
*
* This structure's lifetime is managed by RCU, assignments to
* the array holding it must hold the aggregation mutex.
*
* The TX path can access it under RCU lock-free if, and
* only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
* set. Otherwise, the TX path must also acquire the spinlock
* and re-check the state, see comments in the tx code
* touching it.
*/
struct tid_ampdu_tx {
struct rcu_head rcu_head;
struct timer_list session_timer;
struct timer_list addba_resp_timer;
struct sk_buff_head pending;
struct sta_info *sta;
unsigned long state;
unsigned long last_tx;
u16 timeout;
u8 dialog_token;
u8 stop_initiator;
bool tx_stop;
u16 buf_size;
u16 failed_bar_ssn;
bool bar_pending;
bool amsdu;
u8 tid;
};
/**
* struct tid_ampdu_rx - TID aggregation information (Rx).
*
* @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an
* A-MSDU with individually reported subframes.
* @reorder_buf_filtered: bitmap indicating where there are filtered frames in
* the reorder buffer that should be ignored when releasing frames
* @reorder_time: jiffies when skb was added
* @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
* @reorder_timer: releases expired frames from the reorder buffer.
* @sta: station we are attached to
* @last_rx: jiffies of last rx activity
* @head_seq_num: head sequence number in reordering buffer.
* @stored_mpdu_num: number of MPDUs in reordering buffer
* @ssn: Starting Sequence Number expected to be aggregated.
* @buf_size: buffer size for incoming A-MPDUs
* @timeout: reset timer value (in TUs).
* @tid: TID number
* @rcu_head: RCU head used for freeing this struct
* @reorder_lock: serializes access to reorder buffer, see below.
* @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and
* and ssn.
* @removed: this session is removed (but might have been found due to RCU)
* @started: this session has started (head ssn or higher was received)
*
* This structure's lifetime is managed by RCU, assignments to
* the array holding it must hold the aggregation mutex.
*
* The @reorder_lock is used to protect the members of this
* struct, except for @timeout, @buf_size and @dialog_token,
* which are constant across the lifetime of the struct (the
* dialog token being used only for debugging).
*/
struct tid_ampdu_rx {
struct rcu_head rcu_head;
spinlock_t reorder_lock;
u64 reorder_buf_filtered;
struct sk_buff_head *reorder_buf;
unsigned long *reorder_time;
struct sta_info *sta;
struct timer_list session_timer;
struct timer_list reorder_timer;
unsigned long last_rx;
u16 head_seq_num;
u16 stored_mpdu_num;
u16 ssn;
u16 buf_size;
u16 timeout;
u8 tid;
u8 auto_seq:1,
removed:1,
started:1;
};
/**
* struct sta_ampdu_mlme - STA aggregation information.
*
* @mtx: mutex to protect all TX data (except non-NULL assignments
* to tid_tx[idx], which are protected by the sta spinlock)
* tid_start_tx is also protected by sta->lock.
* @tid_rx: aggregation info for Rx per TID -- RCU protected
* @tid_rx_token: dialog tokens for valid aggregation sessions
* @tid_rx_timer_expired: bitmap indicating on which TIDs the
* RX timer expired until the work for it runs
* @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
* driver requested to close until the work for it runs
* @tid_rx_manage_offl: bitmap indicating which BA sessions were requested
* to be treated as started/stopped due to offloading
* @agg_session_valid: bitmap indicating which TID has a rx BA session open on
* @unexpected_agg: bitmap indicating which TID already sent a delBA due to
* unexpected aggregation related frames outside a session
* @work: work struct for starting/stopping aggregation
* @tid_tx: aggregation info for Tx per TID
* @tid_start_tx: sessions where start was requested
* @last_addba_req_time: timestamp of the last addBA request.
* @addba_req_num: number of times addBA request has been sent.
* @dialog_token_allocator: dialog token enumerator for each new session;
*/
struct sta_ampdu_mlme {
struct mutex mtx;
/* rx */
struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS];
u8 tid_rx_token[IEEE80211_NUM_TIDS];
unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
unsigned long tid_rx_manage_offl[BITS_TO_LONGS(2 * IEEE80211_NUM_TIDS)];
unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
/* tx */
struct work_struct<
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