1021 lines
34 KiB
C
1021 lines
34 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright 2002-2005, Devicescape Software, Inc.
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* Copyright 2013-2014 Intel Mobile Communications GmbH
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* Copyright(c) 2015-2017 Intel Deutschland GmbH
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* Copyright(c) 2020-2022 Intel Corporation
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*/
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#ifndef STA_INFO_H
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#define STA_INFO_H
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#include <linux/list.h>
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#include <linux/types.h>
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#include <linux/if_ether.h>
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#include <linux/workqueue.h>
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#include <linux/average.h>
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#include <linux/bitfield.h>
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#include <linux/etherdevice.h>
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#include <linux/rhashtable.h>
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#include <linux/u64_stats_sync.h>
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#include "key.h"
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/**
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* enum ieee80211_sta_info_flags - Stations flags
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*
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* These flags are used with &struct sta_info's @flags member, but
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* only indirectly with set_sta_flag() and friends.
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*
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* @WLAN_STA_AUTH: Station is authenticated.
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* @WLAN_STA_ASSOC: Station is associated.
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* @WLAN_STA_PS_STA: Station is in power-save mode
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* @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic.
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* This bit is always checked so needs to be enabled for all stations
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* when virtual port control is not in use.
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* @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble
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* frames.
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* @WLAN_STA_WDS: Station is one of our WDS peers.
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* @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
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* IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next
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* frame to this station is transmitted.
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* @WLAN_STA_MFP: Management frame protection is used with this STA.
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* @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX)
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* during suspend/resume and station removal.
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* @WLAN_STA_PS_DRIVER: driver requires keeping this station in
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* power-save mode logically to flush frames that might still
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* be in the queues
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* @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping
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* station in power-save mode, reply when the driver unblocks.
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* @WLAN_STA_TDLS_PEER: Station is a TDLS peer.
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* @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct
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* packets. This means the link is enabled.
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* @WLAN_STA_TDLS_INITIATOR: We are the initiator of the TDLS link with this
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* station.
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* @WLAN_STA_TDLS_CHAN_SWITCH: This TDLS peer supports TDLS channel-switching
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* @WLAN_STA_TDLS_OFF_CHANNEL: The local STA is currently off-channel with this
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* TDLS peer
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* @WLAN_STA_TDLS_WIDER_BW: This TDLS peer supports working on a wider bw on
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* the BSS base channel.
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* @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was
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* keeping station in power-save mode, reply when the driver
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* unblocks the station.
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* @WLAN_STA_SP: Station is in a service period, so don't try to
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* reply to other uAPSD trigger frames or PS-Poll.
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* @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame.
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* @WLAN_STA_INSERTED: This station is inserted into the hash table.
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* @WLAN_STA_RATE_CONTROL: rate control was initialized for this station.
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* @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid.
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* @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period.
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* @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP.
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* @WLAN_STA_PS_DELIVER: station woke up, but we're still blocking TX
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* until pending frames are delivered
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* @WLAN_STA_USES_ENCRYPTION: This station was configured for encryption,
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* so drop all packets without a key later.
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* @WLAN_STA_DECAP_OFFLOAD: This station uses rx decap offload
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*
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* @NUM_WLAN_STA_FLAGS: number of defined flags
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*/
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enum ieee80211_sta_info_flags {
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WLAN_STA_AUTH,
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WLAN_STA_ASSOC,
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WLAN_STA_PS_STA,
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WLAN_STA_AUTHORIZED,
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WLAN_STA_SHORT_PREAMBLE,
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WLAN_STA_WDS,
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WLAN_STA_CLEAR_PS_FILT,
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WLAN_STA_MFP,
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WLAN_STA_BLOCK_BA,
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WLAN_STA_PS_DRIVER,
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WLAN_STA_PSPOLL,
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WLAN_STA_TDLS_PEER,
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WLAN_STA_TDLS_PEER_AUTH,
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WLAN_STA_TDLS_INITIATOR,
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WLAN_STA_TDLS_CHAN_SWITCH,
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WLAN_STA_TDLS_OFF_CHANNEL,
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WLAN_STA_TDLS_WIDER_BW,
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WLAN_STA_UAPSD,
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WLAN_STA_SP,
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WLAN_STA_4ADDR_EVENT,
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WLAN_STA_INSERTED,
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WLAN_STA_RATE_CONTROL,
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WLAN_STA_TOFFSET_KNOWN,
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WLAN_STA_MPSP_OWNER,
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WLAN_STA_MPSP_RECIPIENT,
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WLAN_STA_PS_DELIVER,
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WLAN_STA_USES_ENCRYPTION,
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WLAN_STA_DECAP_OFFLOAD,
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NUM_WLAN_STA_FLAGS,
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};
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#define ADDBA_RESP_INTERVAL HZ
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#define HT_AGG_MAX_RETRIES 15
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#define HT_AGG_BURST_RETRIES 3
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#define HT_AGG_RETRIES_PERIOD (15 * HZ)
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#define HT_AGG_STATE_DRV_READY 0
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#define HT_AGG_STATE_RESPONSE_RECEIVED 1
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#define HT_AGG_STATE_OPERATIONAL 2
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#define HT_AGG_STATE_STOPPING 3
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#define HT_AGG_STATE_WANT_START 4
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#define HT_AGG_STATE_WANT_STOP 5
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#define HT_AGG_STATE_START_CB 6
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#define HT_AGG_STATE_STOP_CB 7
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#define HT_AGG_STATE_SENT_ADDBA 8
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DECLARE_EWMA(avg_signal, 10, 8)
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enum ieee80211_agg_stop_reason {
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AGG_STOP_DECLINED,
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AGG_STOP_LOCAL_REQUEST,
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AGG_STOP_PEER_REQUEST,
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AGG_STOP_DESTROY_STA,
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};
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/* Debugfs flags to enable/disable use of RX/TX airtime in scheduler */
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#define AIRTIME_USE_TX BIT(0)
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#define AIRTIME_USE_RX BIT(1)
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struct airtime_info {
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u64 rx_airtime;
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u64 tx_airtime;
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u32 last_active;
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s32 deficit;
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atomic_t aql_tx_pending; /* Estimated airtime for frames pending */
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u32 aql_limit_low;
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u32 aql_limit_high;
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};
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void ieee80211_sta_update_pending_airtime(struct ieee80211_local *local,
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struct sta_info *sta, u8 ac,
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u16 tx_airtime, bool tx_completed);
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struct sta_info;
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/**
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* struct tid_ampdu_tx - TID aggregation information (Tx).
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*
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* @rcu_head: rcu head for freeing structure
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* @session_timer: check if we keep Tx-ing on the TID (by timeout value)
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* @addba_resp_timer: timer for peer's response to addba request
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* @pending: pending frames queue -- use sta's spinlock to protect
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* @sta: station we are attached to
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* @dialog_token: dialog token for aggregation session
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* @timeout: session timeout value to be filled in ADDBA requests
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* @tid: TID number
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* @state: session state (see above)
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* @last_tx: jiffies of last tx activity
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* @stop_initiator: initiator of a session stop
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* @tx_stop: TX DelBA frame when stopping
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* @buf_size: reorder buffer size at receiver
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* @failed_bar_ssn: ssn of the last failed BAR tx attempt
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* @bar_pending: BAR needs to be re-sent
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* @amsdu: support A-MSDU withing A-MDPU
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* @ssn: starting sequence number of the session
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*
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* This structure's lifetime is managed by RCU, assignments to
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* the array holding it must hold the aggregation mutex.
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*
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* The TX path can access it under RCU lock-free if, and
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* only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
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* set. Otherwise, the TX path must also acquire the spinlock
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* and re-check the state, see comments in the tx code
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* touching it.
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*/
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struct tid_ampdu_tx {
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struct rcu_head rcu_head;
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struct timer_list session_timer;
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struct timer_list addba_resp_timer;
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struct sk_buff_head pending;
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struct sta_info *sta;
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unsigned long state;
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unsigned long last_tx;
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u16 timeout;
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u8 dialog_token;
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u8 stop_initiator;
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bool tx_stop;
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u16 buf_size;
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u16 ssn;
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u16 failed_bar_ssn;
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bool bar_pending;
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bool amsdu;
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u8 tid;
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};
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/**
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* struct tid_ampdu_rx - TID aggregation information (Rx).
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*
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* @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an
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* A-MSDU with individually reported subframes.
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* @reorder_buf_filtered: bitmap indicating where there are filtered frames in
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* the reorder buffer that should be ignored when releasing frames
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* @reorder_time: jiffies when skb was added
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* @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
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* @reorder_timer: releases expired frames from the reorder buffer.
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* @sta: station we are attached to
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* @last_rx: jiffies of last rx activity
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* @head_seq_num: head sequence number in reordering buffer.
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* @stored_mpdu_num: number of MPDUs in reordering buffer
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* @ssn: Starting Sequence Number expected to be aggregated.
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* @buf_size: buffer size for incoming A-MPDUs
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* @timeout: reset timer value (in TUs).
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* @tid: TID number
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* @rcu_head: RCU head used for freeing this struct
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* @reorder_lock: serializes access to reorder buffer, see below.
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* @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and
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* and ssn.
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* @removed: this session is removed (but might have been found due to RCU)
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* @started: this session has started (head ssn or higher was received)
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*
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* This structure's lifetime is managed by RCU, assignments to
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* the array holding it must hold the aggregation mutex.
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*
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* The @reorder_lock is used to protect the members of this
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* struct, except for @timeout, @buf_size and @dialog_token,
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* which are constant across the lifetime of the struct (the
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* dialog token being used only for debugging).
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*/
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struct tid_ampdu_rx {
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struct rcu_head rcu_head;
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spinlock_t reorder_lock;
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u64 reorder_buf_filtered;
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struct sk_buff_head *reorder_buf;
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unsigned long *reorder_time;
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struct sta_info *sta;
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struct timer_list session_timer;
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struct timer_list reorder_timer;
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unsigned long last_rx;
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u16 head_seq_num;
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u16 stored_mpdu_num;
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u16 ssn;
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u16 buf_size;
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u16 timeout;
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u8 tid;
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u8 auto_seq:1,
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removed:1,
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started:1;
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};
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/**
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* struct sta_ampdu_mlme - STA aggregation information.
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*
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* @mtx: mutex to protect all TX data (except non-NULL assignments
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* to tid_tx[idx], which are protected by the sta spinlock)
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* tid_start_tx is also protected by sta->lock.
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* @tid_rx: aggregation info for Rx per TID -- RCU protected
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* @tid_rx_token: dialog tokens for valid aggregation sessions
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* @tid_rx_timer_expired: bitmap indicating on which TIDs the
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* RX timer expired until the work for it runs
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* @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
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* driver requested to close until the work for it runs
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* @tid_rx_manage_offl: bitmap indicating which BA sessions were requested
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* to be treated as started/stopped due to offloading
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* @agg_session_valid: bitmap indicating which TID has a rx BA session open on
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* @unexpected_agg: bitmap indicating which TID already sent a delBA due to
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* unexpected aggregation related frames outside a session
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* @work: work struct for starting/stopping aggregation
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* @tid_tx: aggregation info for Tx per TID
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* @tid_start_tx: sessions where start was requested
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* @last_addba_req_time: timestamp of the last addBA request.
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* @addba_req_num: number of times addBA request has been sent.
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* @dialog_token_allocator: dialog token enumerator for each new session;
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*/
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struct sta_ampdu_mlme {
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struct mutex mtx;
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/* rx */
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struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS];
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u8 tid_rx_token[IEEE80211_NUM_TIDS];
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unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
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unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
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unsigned long tid_rx_manage_offl[BITS_TO_LONGS(2 * IEEE80211_NUM_TIDS)];
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unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
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unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
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/* tx */
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struct work_struct work;
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struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS];
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struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS];
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unsigned long last_addba_req_time[IEEE80211_NUM_TIDS];
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u8 addba_req_num[IEEE80211_NUM_TIDS];
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u8 dialog_token_allocator;
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};
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/* Value to indicate no TID reservation */
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#define IEEE80211_TID_UNRESERVED 0xff
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#define IEEE80211_FAST_XMIT_MAX_IV 18
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/**
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* struct ieee80211_fast_tx - TX fastpath information
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* @key: key to use for hw crypto
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* @hdr: the 802.11 header to put with the frame
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* @hdr_len: actual 802.11 header length
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* @sa_offs: offset of the SA
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* @da_offs: offset of the DA
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* @pn_offs: offset where to put PN for crypto (or 0 if not needed)
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* @band: band this will be transmitted on, for tx_info
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* @rcu_head: RCU head to free this struct
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*
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* This struct is small enough so that the common case (maximum crypto
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* header length of 8 like for CCMP/GCMP) fits into a single 64-byte
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* cache line.
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*/
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struct ieee80211_fast_tx {
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struct ieee80211_key *key;
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u8 hdr_len;
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u8 sa_offs, da_offs, pn_offs;
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u8 band;
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u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
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sizeof(rfc1042_header)] __aligned(2);
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struct rcu_head rcu_head;
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};
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/**
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* struct ieee80211_fast_rx - RX fastpath information
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* @dev: netdevice for reporting the SKB
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* @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type)
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* @vif_addr: interface address
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* @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache)
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* @control_port_protocol: control port protocol copied from sdata
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* @expected_ds_bits: from/to DS bits expected
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* @icv_len: length of the MIC if present
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* @key: bool indicating encryption is expected (key is set)
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* @internal_forward: forward froms internally on AP/VLAN type interfaces
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* @uses_rss: copy of USES_RSS hw flag
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* @da_offs: offset of the DA in the header (for header conversion)
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* @sa_offs: offset of the SA in the header (for header conversion)
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* @rcu_head: RCU head for freeing this structure
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*/
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struct ieee80211_fast_rx {
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struct net_device *dev;
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enum nl80211_iftype vif_type;
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u8 vif_addr[ETH_ALEN] __aligned(2);
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u8 rfc1042_hdr[6] __aligned(2);
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__be16 control_port_protocol;
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__le16 expected_ds_bits;
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u8 icv_len;
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u8 key:1,
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internal_forward:1,
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uses_rss:1;
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u8 da_offs, sa_offs;
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struct rcu_head rcu_head;
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};
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/* we use only values in the range 0-100, so pick a large precision */
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DECLARE_EWMA(mesh_fail_avg, 20, 8)
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DECLARE_EWMA(mesh_tx_rate_avg, 8, 16)
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/**
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* struct mesh_sta - mesh STA information
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* @plink_lock: serialize access to plink fields
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* @llid: Local link ID
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* @plid: Peer link ID
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* @aid: local aid supplied by peer
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* @reason: Cancel reason on PLINK_HOLDING state
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* @plink_retries: Retries in establishment
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* @plink_state: peer link state
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* @plink_timeout: timeout of peer link
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* @plink_timer: peer link watch timer
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* @plink_sta: peer link watch timer's sta_info
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* @t_offset: timing offset relative to this host
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* @t_offset_setpoint: reference timing offset of this sta to be used when
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* calculating clockdrift
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* @local_pm: local link-specific power save mode
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* @peer_pm: peer-specific power save mode towards local STA
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* @nonpeer_pm: STA power save mode towards non-peer neighbors
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* @processed_beacon: set to true after peer rates and capabilities are
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* processed
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* @connected_to_gate: true if mesh STA has a path to a mesh gate
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* @connected_to_as: true if mesh STA has a path to a authentication server
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* @fail_avg: moving percentage of failed MSDUs
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* @tx_rate_avg: moving average of tx bitrate
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*/
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struct mesh_sta {
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struct timer_list plink_timer;
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struct sta_info *plink_sta;
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s64 t_offset;
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s64 t_offset_setpoint;
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spinlock_t plink_lock;
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u16 llid;
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u16 plid;
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u16 aid;
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u16 reason;
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u8 plink_retries;
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bool processed_beacon;
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bool connected_to_gate;
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bool connected_to_as;
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enum nl80211_plink_state plink_state;
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u32 plink_timeout;
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/* mesh power save */
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enum nl80211_mesh_power_mode local_pm;
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enum nl80211_mesh_power_mode peer_pm;
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enum nl80211_mesh_power_mode nonpeer_pm;
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/* moving percentage of failed MSDUs */
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struct ewma_mesh_fail_avg fail_avg;
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/* moving average of tx bitrate */
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struct ewma_mesh_tx_rate_avg tx_rate_avg;
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};
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DECLARE_EWMA(signal, 10, 8)
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struct ieee80211_sta_rx_stats {
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unsigned long packets;
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unsigned long last_rx;
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unsigned long num_duplicates;
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unsigned long fragments;
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unsigned long dropped;
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int last_signal;
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u8 chains;
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s8 chain_signal_last[IEEE80211_MAX_CHAINS];
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u32 last_rate;
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struct u64_stats_sync syncp;
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u64 bytes;
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u64 msdu[IEEE80211_NUM_TIDS + 1];
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};
|
|
|
|
/*
|
|
* IEEE 802.11-2016 (10.6 "Defragmentation") recommends support for "concurrent
|
|
* reception of at least one MSDU per access category per associated STA"
|
|
* on APs, or "at least one MSDU per access category" on other interface types.
|
|
*
|
|
* This limit can be increased by changing this define, at the cost of slower
|
|
* frame reassembly and increased memory use while fragments are pending.
|
|
*/
|
|
#define IEEE80211_FRAGMENT_MAX 4
|
|
|
|
struct ieee80211_fragment_entry {
|
|
struct sk_buff_head skb_list;
|
|
unsigned long first_frag_time;
|
|
u16 seq;
|
|
u16 extra_len;
|
|
u16 last_frag;
|
|
u8 rx_queue;
|
|
u8 check_sequential_pn:1, /* needed for CCMP/GCMP */
|
|
is_protected:1;
|
|
u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
|
|
unsigned int key_color;
|
|
};
|
|
|
|
struct ieee80211_fragment_cache {
|
|
struct ieee80211_fragment_entry entries[IEEE80211_FRAGMENT_MAX];
|
|
unsigned int next;
|
|
};
|
|
|
|
/*
|
|
* The bandwidth threshold below which the per-station CoDel parameters will be
|
|
* scaled to be more lenient (to prevent starvation of slow stations). This
|
|
* value will be scaled by the number of active stations when it is being
|
|
* applied.
|
|
*/
|
|
#define STA_SLOW_THRESHOLD 6000 /* 6 Mbps */
|
|
|
|
/**
|
|
* struct link_sta_info - Link STA information
|
|
* All link specific sta info are stored here for reference. This can be
|
|
* a single entry for non-MLD STA or multiple entries for MLD STA
|
|
* @addr: Link MAC address - Can be same as MLD STA mac address and is always
|
|
* same for non-MLD STA. This is used as key for searching link STA
|
|
* @link_id: Link ID uniquely identifying the link STA. This is 0 for non-MLD
|
|
* and set to the corresponding vif LinkId for MLD STA
|
|
* @link_hash_node: hash node for rhashtable
|
|
* @sta: Points to the STA info
|
|
* @gtk: group keys negotiated with this station, if any
|
|
* @tx_stats: TX statistics
|
|
* @tx_stats.packets: # of packets transmitted
|
|
* @tx_stats.bytes: # of bytes in all packets transmitted
|
|
* @tx_stats.last_rate: last TX rate
|
|
* @tx_stats.msdu: # of transmitted MSDUs per TID
|
|
* @rx_stats: RX statistics
|
|
* @rx_stats_avg: averaged RX statistics
|
|
* @rx_stats_avg.signal: averaged signal
|
|
* @rx_stats_avg.chain_signal: averaged per-chain signal
|
|
* @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs
|
|
* this (by advertising the USES_RSS hw flag)
|
|
* @status_stats: TX status statistics
|
|
* @status_stats.filtered: # of filtered frames
|
|
* @status_stats.retry_failed: # of frames that failed after retry
|
|
* @status_stats.retry_count: # of retries attempted
|
|
* @status_stats.lost_packets: # of lost packets
|
|
* @status_stats.last_pkt_time: timestamp of last ACKed packet
|
|
* @status_stats.msdu_retries: # of MSDU retries
|
|
* @status_stats.msdu_failed: # of failed MSDUs
|
|
* @status_stats.last_ack: last ack timestamp (jiffies)
|
|
* @status_stats.last_ack_signal: last ACK signal
|
|
* @status_stats.ack_signal_filled: last ACK signal validity
|
|
* @status_stats.avg_ack_signal: average ACK signal
|
|
* @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
|
|
* taken from HT/VHT capabilities or VHT operating mode notification
|
|
* @debugfs_dir: debug filesystem directory dentry
|
|
* @pub: public (driver visible) link STA data
|
|
* TODO Move other link params from sta_info as required for MLD operation
|
|
*/
|
|
struct link_sta_info {
|
|
u8 addr[ETH_ALEN];
|
|
u8 link_id;
|
|
|
|
struct rhlist_head link_hash_node;
|
|
|
|
struct sta_info *sta;
|
|
struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS +
|
|
NUM_DEFAULT_MGMT_KEYS +
|
|
NUM_DEFAULT_BEACON_KEYS];
|
|
struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats;
|
|
|
|
/* Updated from RX path only, no locking requirements */
|
|
struct ieee80211_sta_rx_stats rx_stats;
|
|
struct {
|
|
struct ewma_signal signal;
|
|
struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS];
|
|
} rx_stats_avg;
|
|
|
|
/* Updated from TX status path only, no locking requirements */
|
|
struct {
|
|
unsigned long filtered;
|
|
unsigned long retry_failed, retry_count;
|
|
unsigned int lost_packets;
|
|
unsigned long last_pkt_time;
|
|
u64 msdu_retries[IEEE80211_NUM_TIDS + 1];
|
|
u64 msdu_failed[IEEE80211_NUM_TIDS + 1];
|
|
unsigned long last_ack;
|
|
s8 last_ack_signal;
|
|
bool ack_signal_filled;
|
|
struct ewma_avg_signal avg_ack_signal;
|
|
} status_stats;
|
|
|
|
/* Updated from TX path only, no locking requirements */
|
|
struct {
|
|
u64 packets[IEEE80211_NUM_ACS];
|
|
u64 bytes[IEEE80211_NUM_ACS];
|
|
struct ieee80211_tx_rate last_rate;
|
|
struct rate_info last_rate_info;
|
|
u64 msdu[IEEE80211_NUM_TIDS + 1];
|
|
} tx_stats;
|
|
|
|
enum ieee80211_sta_rx_bandwidth cur_max_bandwidth;
|
|
|
|
#ifdef CONFIG_MAC80211_DEBUGFS
|
|
struct dentry *debugfs_dir;
|
|
#endif
|
|
|
|
struct ieee80211_link_sta *pub;
|
|
};
|
|
|
|
/**
|
|
* struct sta_info - STA information
|
|
*
|
|
* This structure collects information about a station that
|
|
* mac80211 is communicating with.
|
|
*
|
|
* @list: global linked list entry
|
|
* @free_list: list entry for keeping track of stations to free
|
|
* @hash_node: hash node for rhashtable
|
|
* @addr: station's MAC address - duplicated from public part to
|
|
* let the hash table work with just a single cacheline
|
|
* @local: pointer to the global information
|
|
* @sdata: virtual interface this station belongs to
|
|
* @ptk: peer keys negotiated with this station, if any
|
|
* @ptk_idx: last installed peer key index
|
|
* @rate_ctrl: rate control algorithm reference
|
|
* @rate_ctrl_lock: spinlock used to protect rate control data
|
|
* (data inside the algorithm, so serializes calls there)
|
|
* @rate_ctrl_priv: rate control private per-STA pointer
|
|
* @lock: used for locking all fields that require locking, see comments
|
|
* in the header file.
|
|
* @drv_deliver_wk: used for delivering frames after driver PS unblocking
|
|
* @listen_interval: listen interval of this station, when we're acting as AP
|
|
* @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
|
|
* @ps_lock: used for powersave (when mac80211 is the AP) related locking
|
|
* @ps_tx_buf: buffers (per AC) of frames to transmit to this station
|
|
* when it leaves power saving state or polls
|
|
* @tx_filtered: buffers (per AC) of frames we already tried to
|
|
* transmit but were filtered by hardware due to STA having
|
|
* entered power saving state, these are also delivered to
|
|
* the station when it leaves powersave or polls for frames
|
|
* @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
|
|
* @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on
|
|
* @assoc_at: clock boottime (in ns) of last association
|
|
* @last_connected: time (in seconds) when a station got connected
|
|
* @last_seq_ctrl: last received seq/frag number from this STA (per TID
|
|
* plus one for non-QoS frames)
|
|
* @tid_seq: per-TID sequence numbers for sending to this STA
|
|
* @airtime: per-AC struct airtime_info describing airtime statistics for this
|
|
* station
|
|
* @airtime_weight: station weight for airtime fairness calculation purposes
|
|
* @ampdu_mlme: A-MPDU state machine state
|
|
* @mesh: mesh STA information
|
|
* @debugfs_dir: debug filesystem directory dentry
|
|
* @dead: set to true when sta is unlinked
|
|
* @removed: set to true when sta is being removed from sta_list
|
|
* @uploaded: set to true when sta is uploaded to the driver
|
|
* @sta: station information we share with the driver
|
|
* @sta_state: duplicates information about station state (for debug)
|
|
* @rcu_head: RCU head used for freeing this station struct
|
|
* @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
|
|
* taken from HT/VHT capabilities or VHT operating mode notification
|
|
* @cparams: CoDel parameters for this station.
|
|
* @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED)
|
|
* @amsdu_mesh_control: track the mesh A-MSDU format used by the peer:
|
|
*
|
|
* * -1: not yet known
|
|
* * 0: non-mesh A-MSDU length field
|
|
* * 1: big-endian mesh A-MSDU length field
|
|
* * 2: little-endian mesh A-MSDU length field
|
|
*
|
|
* @fast_tx: TX fastpath information
|
|
* @fast_rx: RX fastpath information
|
|
* @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to
|
|
* the BSS one.
|
|
* @frags: fragment cache
|
|
* @cur: storage for aggregation data
|
|
* &struct ieee80211_sta points either here or to deflink.agg.
|
|
* @deflink: This is the default link STA information, for non MLO STA all link
|
|
* specific STA information is accessed through @deflink or through
|
|
* link[0] which points to address of @deflink. For MLO Link STA
|
|
* the first added link STA will point to deflink.
|
|
* @link: reference to Link Sta entries. For Non MLO STA, except 1st link,
|
|
* i.e link[0] all links would be assigned to NULL by default and
|
|
* would access link information via @deflink or link[0]. For MLO
|
|
* STA, first link STA being added will point its link pointer to
|
|
* @deflink address and remaining would be allocated and the address
|
|
* would be assigned to link[link_id] where link_id is the id assigned
|
|
* by the AP.
|
|
*/
|
|
struct sta_info {
|
|
/* General information, mostly static */
|
|
struct list_head list, free_list;
|
|
struct rcu_head rcu_head;
|
|
struct rhlist_head hash_node;
|
|
u8 addr[ETH_ALEN];
|
|
struct ieee80211_local *local;
|
|
struct ieee80211_sub_if_data *sdata;
|
|
struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS];
|
|
u8 ptk_idx;
|
|
struct rate_control_ref *rate_ctrl;
|
|
void *rate_ctrl_priv;
|
|
spinlock_t rate_ctrl_lock;
|
|
spinlock_t lock;
|
|
|
|
struct ieee80211_fast_tx __rcu *fast_tx;
|
|
struct ieee80211_fast_rx __rcu *fast_rx;
|
|
|
|
#ifdef CONFIG_MAC80211_MESH
|
|
struct mesh_sta *mesh;
|
|
#endif
|
|
|
|
struct work_struct drv_deliver_wk;
|
|
|
|
u16 listen_interval;
|
|
|
|
bool dead;
|
|
bool removed;
|
|
|
|
bool uploaded;
|
|
|
|
enum ieee80211_sta_state sta_state;
|
|
|
|
/* use the accessors defined below */
|
|
unsigned long _flags;
|
|
|
|
/* STA powersave lock and frame queues */
|
|
spinlock_t ps_lock;
|
|
struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
|
|
struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
|
|
unsigned long driver_buffered_tids;
|
|
unsigned long txq_buffered_tids;
|
|
|
|
u64 assoc_at;
|
|
long last_connected;
|
|
|
|
/* Plus 1 for non-QoS frames */
|
|
__le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
|
|
|
|
u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
|
|
|
|
struct airtime_info airtime[IEEE80211_NUM_ACS];
|
|
u16 airtime_weight;
|
|
|
|
/*
|
|
* Aggregation information, locked with lock.
|
|
*/
|
|
struct sta_ampdu_mlme ampdu_mlme;
|
|
|
|
#ifdef CONFIG_MAC80211_DEBUGFS
|
|
struct dentry *debugfs_dir;
|
|
#endif
|
|
|
|
struct codel_params cparams;
|
|
|
|
u8 reserved_tid;
|
|
s8 amsdu_mesh_control;
|
|
|
|
struct cfg80211_chan_def tdls_chandef;
|
|
|
|
struct ieee80211_fragment_cache frags;
|
|
|
|
struct ieee80211_sta_aggregates cur;
|
|
struct link_sta_info deflink;
|
|
struct link_sta_info __rcu *link[IEEE80211_MLD_MAX_NUM_LINKS];
|
|
|
|
/* keep last! */
|
|
struct ieee80211_sta sta;
|
|
};
|
|
|
|
static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
|
|
{
|
|
#ifdef CONFIG_MAC80211_MESH
|
|
return sta->mesh->plink_state;
|
|
#endif
|
|
return NL80211_PLINK_LISTEN;
|
|
}
|
|
|
|
static inline void set_sta_flag(struct sta_info *sta,
|
|
enum ieee80211_sta_info_flags flag)
|
|
{
|
|
WARN_ON(flag == WLAN_STA_AUTH ||
|
|
flag == WLAN_STA_ASSOC ||
|
|
flag == WLAN_STA_AUTHORIZED);
|
|
set_bit(flag, &sta->_flags);
|
|
}
|
|
|
|
static inline void clear_sta_flag(struct sta_info *sta,
|
|
enum ieee80211_sta_info_flags flag)
|
|
{
|
|
WARN_ON(flag == WLAN_STA_AUTH ||
|
|
flag == WLAN_STA_ASSOC ||
|
|
flag == WLAN_STA_AUTHORIZED);
|
|
clear_bit(flag, &sta->_flags);
|
|
}
|
|
|
|
static inline int test_sta_flag(struct sta_info *sta,
|
|
enum ieee80211_sta_info_flags flag)
|
|
{
|
|
return test_bit(flag, &sta->_flags);
|
|
}
|
|
|
|
static inline int test_and_clear_sta_flag(struct sta_info *sta,
|
|
enum ieee80211_sta_info_flags flag)
|
|
{
|
|
WARN_ON(flag == WLAN_STA_AUTH ||
|
|
flag == WLAN_STA_ASSOC ||
|
|
flag == WLAN_STA_AUTHORIZED);
|
|
return test_and_clear_bit(flag, &sta->_flags);
|
|
}
|
|
|
|
static inline int test_and_set_sta_flag(struct sta_info *sta,
|
|
enum ieee80211_sta_info_flags flag)
|
|
{
|
|
WARN_ON(flag == WLAN_STA_AUTH ||
|
|
flag == WLAN_STA_ASSOC ||
|
|
flag == WLAN_STA_AUTHORIZED);
|
|
return test_and_set_bit(flag, &sta->_flags);
|
|
}
|
|
|
|
int sta_info_move_state(struct sta_info *sta,
|
|
enum ieee80211_sta_state new_state);
|
|
|
|
static inline void sta_info_pre_move_state(struct sta_info *sta,
|
|
enum ieee80211_sta_state new_state)
|
|
{
|
|
int ret;
|
|
|
|
WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
|
|
|
|
ret = sta_info_move_state(sta, new_state);
|
|
WARN_ON_ONCE(ret);
|
|
}
|
|
|
|
|
|
void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
|
|
struct tid_ampdu_tx *tid_tx);
|
|
|
|
static inline struct tid_ampdu_tx *
|
|
rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
|
|
{
|
|
return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
|
|
lockdep_is_held(&sta->lock) ||
|
|
lockdep_is_held(&sta->ampdu_mlme.mtx));
|
|
}
|
|
|
|
/* Maximum number of frames to buffer per power saving station per AC */
|
|
#define STA_MAX_TX_BUFFER 64
|
|
|
|
/* Minimum buffered frame expiry time. If STA uses listen interval that is
|
|
* smaller than this value, the minimum value here is used instead. */
|
|
#define STA_TX_BUFFER_EXPIRE (10 * HZ)
|
|
|
|
/* How often station data is cleaned up (e.g., expiration of buffered frames)
|
|
*/
|
|
#define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
|
|
|
|
struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local,
|
|
const u8 *addr);
|
|
|
|
/*
|
|
* Get a STA info, must be under RCU read lock.
|
|
*/
|
|
struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
|
|
const u8 *addr);
|
|
|
|
struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
|
|
const u8 *addr);
|
|
|
|
/* user must hold sta_mtx or be in RCU critical section */
|
|
struct sta_info *sta_info_get_by_addrs(struct ieee80211_local *local,
|
|
const u8 *sta_addr, const u8 *vif_addr);
|
|
|
|
#define for_each_sta_info(local, _addr, _sta, _tmp) \
|
|
rhl_for_each_entry_rcu(_sta, _tmp, \
|
|
sta_info_hash_lookup(local, _addr), hash_node)
|
|
|
|
struct rhlist_head *link_sta_info_hash_lookup(struct ieee80211_local *local,
|
|
const u8 *addr);
|
|
|
|
#define for_each_link_sta_info(local, _addr, _sta, _tmp) \
|
|
rhl_for_each_entry_rcu(_sta, _tmp, \
|
|
link_sta_info_hash_lookup(local, _addr), \
|
|
link_hash_node)
|
|
|
|
struct link_sta_info *
|
|
link_sta_info_get_bss(struct ieee80211_sub_if_data *sdata, const u8 *addr);
|
|
|
|
/*
|
|
* Get STA info by index, BROKEN!
|
|
*/
|
|
struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
|
|
int idx);
|
|
/*
|
|
* Create a new STA info, caller owns returned structure
|
|
* until sta_info_insert().
|
|
*/
|
|
struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
|
|
const u8 *addr, gfp_t gfp);
|
|
struct sta_info *sta_info_alloc_with_link(struct ieee80211_sub_if_data *sdata,
|
|
const u8 *mld_addr,
|
|
unsigned int link_id,
|
|
const u8 *link_addr,
|
|
gfp_t gfp);
|
|
|
|
void sta_info_free(struct ieee80211_local *local, struct sta_info *sta);
|
|
|
|
/*
|
|
* Insert STA info into hash table/list, returns zero or a
|
|
* -EEXIST if (if the same MAC address is already present).
|
|
*
|
|
* Calling the non-rcu version makes the caller relinquish,
|
|
* the _rcu version calls read_lock_rcu() and must be called
|
|
* without it held.
|
|
*/
|
|
int sta_info_insert(struct sta_info *sta);
|
|
int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
|
|
|
|
int __must_check __sta_info_destroy(struct sta_info *sta);
|
|
int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
|
|
const u8 *addr);
|
|
int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
|
|
const u8 *addr);
|
|
|
|
void sta_info_recalc_tim(struct sta_info *sta);
|
|
|
|
int sta_info_init(struct ieee80211_local *local);
|
|
void sta_info_stop(struct ieee80211_local *local);
|
|
|
|
/**
|
|
* __sta_info_flush - flush matching STA entries from the STA table
|
|
*
|
|
* Returns the number of removed STA entries.
|
|
*
|
|
* @sdata: sdata to remove all stations from
|
|
* @vlans: if the given interface is an AP interface, also flush VLANs
|
|
*/
|
|
int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans);
|
|
|
|
/**
|
|
* sta_info_flush - flush matching STA entries from the STA table
|
|
*
|
|
* Returns the number of removed STA entries.
|
|
*
|
|
* @sdata: sdata to remove all stations from
|
|
*/
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static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata)
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{
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return __sta_info_flush(sdata, false);
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}
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void sta_set_rate_info_tx(struct sta_info *sta,
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const struct ieee80211_tx_rate *rate,
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struct rate_info *rinfo);
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void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
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bool tidstats);
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u32 sta_get_expected_throughput(struct sta_info *sta);
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void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
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unsigned long exp_time);
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int ieee80211_sta_allocate_link(struct sta_info *sta, unsigned int link_id);
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void ieee80211_sta_free_link(struct sta_info *sta, unsigned int link_id);
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int ieee80211_sta_activate_link(struct sta_info *sta, unsigned int link_id);
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void ieee80211_sta_remove_link(struct sta_info *sta, unsigned int link_id);
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void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
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void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
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void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
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unsigned long ieee80211_sta_last_active(struct sta_info *sta);
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void ieee80211_sta_set_max_amsdu_subframes(struct sta_info *sta,
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const u8 *ext_capab,
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unsigned int ext_capab_len);
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void __ieee80211_sta_recalc_aggregates(struct sta_info *sta, u16 active_links);
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enum sta_stats_type {
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STA_STATS_RATE_TYPE_INVALID = 0,
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STA_STATS_RATE_TYPE_LEGACY,
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STA_STATS_RATE_TYPE_HT,
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STA_STATS_RATE_TYPE_VHT,
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STA_STATS_RATE_TYPE_HE,
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STA_STATS_RATE_TYPE_S1G,
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STA_STATS_RATE_TYPE_EHT,
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};
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|
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#define STA_STATS_FIELD_HT_MCS GENMASK( 7, 0)
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#define STA_STATS_FIELD_LEGACY_IDX GENMASK( 3, 0)
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#define STA_STATS_FIELD_LEGACY_BAND GENMASK( 7, 4)
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#define STA_STATS_FIELD_VHT_MCS GENMASK( 3, 0)
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#define STA_STATS_FIELD_VHT_NSS GENMASK( 7, 4)
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#define STA_STATS_FIELD_HE_MCS GENMASK( 3, 0)
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#define STA_STATS_FIELD_HE_NSS GENMASK( 7, 4)
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#define STA_STATS_FIELD_EHT_MCS GENMASK( 3, 0)
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#define STA_STATS_FIELD_EHT_NSS GENMASK( 7, 4)
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|
#define STA_STATS_FIELD_BW GENMASK(12, 8)
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|
#define STA_STATS_FIELD_SGI GENMASK(13, 13)
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|
#define STA_STATS_FIELD_TYPE GENMASK(16, 14)
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|
#define STA_STATS_FIELD_HE_RU GENMASK(19, 17)
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|
#define STA_STATS_FIELD_HE_GI GENMASK(21, 20)
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|
#define STA_STATS_FIELD_HE_DCM GENMASK(22, 22)
|
|
#define STA_STATS_FIELD_EHT_RU GENMASK(20, 17)
|
|
#define STA_STATS_FIELD_EHT_GI GENMASK(22, 21)
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|
|
|
#define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v)
|
|
#define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v)
|
|
|
|
#define STA_STATS_RATE_INVALID 0
|
|
|
|
static inline u32 sta_stats_encode_rate(struct ieee80211_rx_status *s)
|
|
{
|
|
u32 r;
|
|
|
|
r = STA_STATS_FIELD(BW, s->bw);
|
|
|
|
if (s->enc_flags & RX_ENC_FLAG_SHORT_GI)
|
|
r |= STA_STATS_FIELD(SGI, 1);
|
|
|
|
switch (s->encoding) {
|
|
case RX_ENC_VHT:
|
|
r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT);
|
|
r |= STA_STATS_FIELD(VHT_NSS, s->nss);
|
|
r |= STA_STATS_FIELD(VHT_MCS, s->rate_idx);
|
|
break;
|
|
case RX_ENC_HT:
|
|
r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HT);
|
|
r |= STA_STATS_FIELD(HT_MCS, s->rate_idx);
|
|
break;
|
|
case RX_ENC_LEGACY:
|
|
r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_LEGACY);
|
|
r |= STA_STATS_FIELD(LEGACY_BAND, s->band);
|
|
r |= STA_STATS_FIELD(LEGACY_IDX, s->rate_idx);
|
|
break;
|
|
case RX_ENC_HE:
|
|
r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HE);
|
|
r |= STA_STATS_FIELD(HE_NSS, s->nss);
|
|
r |= STA_STATS_FIELD(HE_MCS, s->rate_idx);
|
|
r |= STA_STATS_FIELD(HE_GI, s->he_gi);
|
|
r |= STA_STATS_FIELD(HE_RU, s->he_ru);
|
|
r |= STA_STATS_FIELD(HE_DCM, s->he_dcm);
|
|
break;
|
|
case RX_ENC_EHT:
|
|
r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_EHT);
|
|
r |= STA_STATS_FIELD(EHT_NSS, s->nss);
|
|
r |= STA_STATS_FIELD(EHT_MCS, s->rate_idx);
|
|
r |= STA_STATS_FIELD(EHT_GI, s->eht.gi);
|
|
r |= STA_STATS_FIELD(EHT_RU, s->eht.ru);
|
|
break;
|
|
default:
|
|
WARN_ON(1);
|
|
return STA_STATS_RATE_INVALID;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
#endif /* STA_INFO_H */
|