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Diffstat (limited to '')
| -rw-r--r-- | net/mac80211/sta_info.h | 927 |
1 files changed, 927 insertions, 0 deletions
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h new file mode 100644 index 000000000..b9e5f8e8f --- /dev/null +++ b/net/mac80211/sta_info.h @@ -0,0 +1,927 @@ +/* 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 + * Copyright(c) 2020-2021 Intel Corporation + */ + +#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 + * @WLAN_STA_USES_ENCRYPTION: This station was configured for encryption, + * so drop all packets without a key later. + * + * @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 +#define HT_AGG_STATE_SENT_ADDBA 8 + +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 ssn; + + 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 work; + struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS]; + struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS]; + unsigned long last_addba_req_time[IEEE80211_NUM_TIDS]; + u8 addba_req_num[IEEE80211_NUM_TIDS]; + u8 dialog_token_allocator; +}; + + +/* Value to indicate no TID reservation */ +#define IEEE80211_TID_UNRESERVED 0xff + +#define IEEE80211_FAST_XMIT_MAX_IV 18 + +/** + * struct ieee80211_fast_tx - TX fastpath information + * @key: key to use for hw crypto + * @hdr: the 802.11 header to put with the frame + * @hdr_len: actual 802.11 header length + * @sa_offs: offset of the SA + * @da_offs: offset of the DA + * @pn_offs: offset where to put PN for crypto (or 0 if not needed) + * @band: band this will be transmitted on, for tx_info + * @rcu_head: RCU head to free this struct + * + * This struct is small enough so that the common case (maximum crypto + * header length of 8 like for CCMP/GCMP) fits into a single 64-byte + * cache line. + */ +struct ieee80211_fast_tx { + struct ieee80211_key *key; + u8 hdr_len; + u8 sa_offs, da_offs, pn_offs; + u8 band; + u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV + + sizeof(rfc1042_header)] __aligned(2); + + struct rcu_head rcu_head; +}; + +/** + * struct ieee80211_fast_rx - RX fastpath information + * @dev: netdevice for reporting the SKB + * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type) + * @vif_addr: interface address + * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache) + * @control_port_protocol: control port protocol copied from sdata + * @expected_ds_bits: from/to DS bits expected + * @icv_len: length of the MIC if present + * @key: bool indicating encryption is expected (key is set) + * @internal_forward: forward froms internally on AP/VLAN type interfaces + * @uses_rss: copy of USES_RSS hw flag + * @da_offs: offset of the DA in the header (for header conversion) + * @sa_offs: offset of the SA in the header (for header conversion) + * @rcu_head: RCU head for freeing this structure + */ +struct ieee80211_fast_rx { + struct net_device *dev; + enum nl80211_iftype vif_type; + u8 vif_addr[ETH_ALEN] __aligned(2); + u8 rfc1042_hdr[6] __aligned(2); + __be16 control_port_protocol; + __le16 expected_ds_bits; + u8 icv_len; + u8 key:1, + internal_forward:1, + uses_rss:1; + u8 da_offs, sa_offs; + + struct rcu_head rcu_head; +}; + +/* we use only values in the range 0-100, so pick a large precision */ +DECLARE_EWMA(mesh_fail_avg, 20, 8) +DECLARE_EWMA(mesh_tx_rate_avg, 8, 16) + +/** + * struct mesh_sta - mesh STA information + * @plink_lock: serialize access to plink fields + * @llid: Local link ID + * @plid: Peer link ID + * @aid: local aid supplied by peer + * @reason: Cancel reason on PLINK_HOLDING state + * @plink_retries: Retries in establishment + * @plink_state: peer link state + * @plink_timeout: timeout of peer link + * @plink_timer: peer link watch timer + * @plink_sta: peer link watch timer's sta_info + * @t_offset: timing offset relative to this host + * @t_offset_setpoint: reference timing offset of this sta to be used when + * calculating clockdrift + * @local_pm: local link-specific power save mode + * @peer_pm: peer-specific power save mode towards local STA + * @nonpeer_pm: STA power save mode towards non-peer neighbors + * @processed_beacon: set to true after peer rates and capabilities are + * processed + * @connected_to_gate: true if mesh STA has a path to a mesh gate + * @connected_to_as: true if mesh STA has a path to a authentication server + * @fail_avg: moving percentage of failed MSDUs + * @tx_rate_avg: moving average of tx bitrate + */ +struct mesh_sta { + struct timer_list plink_timer; + struct sta_info *plink_sta; + + s64 t_offset; + s64 t_offset_setpoint; + + spinlock_t plink_lock; + u16 llid; + u16 plid; + u16 aid; + u16 reason; + u8 plink_retries; + + bool processed_beacon; + bool connected_to_gate; + bool connected_to_as; + + enum nl80211_plink_state plink_state; + u32 plink_timeout; + + /* mesh power save */ + enum nl80211_mesh_power_mode local_pm; + enum nl80211_mesh_power_mode peer_pm; + enum nl80211_mesh_power_mode nonpeer_pm; + + /* moving percentage of failed MSDUs */ + struct ewma_mesh_fail_avg fail_avg; + /* moving average of tx bitrate */ + struct ewma_mesh_tx_rate_avg tx_rate_avg; +}; + +DECLARE_EWMA(signal, 10, 8) + +struct ieee80211_sta_rx_stats { + unsigned long packets; + unsigned long last_rx; + unsigned long num_duplicates; + unsigned long fragments; + unsigned long dropped; + int last_signal; + u8 chains; + s8 chain_signal_last[IEEE80211_MAX_CHAINS]; + u32 last_rate; + struct u64_stats_sync syncp; + u64 bytes; + u64 msdu[IEEE80211_NUM_TIDS + 1]; +}; + +/* + * 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 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 + * @gtk: group keys negotiated with this station, if any + * @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 + * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for + * AP only. + * @cipher_scheme: optional cipher scheme for this station + * @cparams: CoDel parameters for this station. + * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED) + * @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. + * @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 + * @frags: fragment cache + */ +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 *gtk[NUM_DEFAULT_KEYS + + NUM_DEFAULT_MGMT_KEYS + + NUM_DEFAULT_BEACON_KEYS]; + 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; + struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats; + +#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; + + /* 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; + + /* Plus 1 for non-QoS frames */ + __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1]; + + /* 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; + 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 + + enum ieee80211_sta_rx_bandwidth cur_max_bandwidth; + + enum ieee80211_smps_mode known_smps_mode; + const struct ieee80211_cipher_scheme *cipher_scheme; + + struct codel_params cparams; + + u8 reserved_tid; + + struct cfg80211_chan_def tdls_chandef; + + struct ieee80211_fragment_cache frags; + + /* 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) + +/* + * 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); + +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 + */ +static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata) +{ + return __sta_info_flush(sdata, false); +} + +void sta_set_rate_info_tx(struct sta_info *sta, + const struct ieee80211_tx_rate *rate, + struct rate_info *rinfo); +void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo, + bool tidstats); + +u32 sta_get_expected_throughput(struct sta_info *sta); + +void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, + unsigned long exp_time); +u8 sta_info_tx_streams(struct sta_info *sta); + +void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); +void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); +void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); + +unsigned long ieee80211_sta_last_active(struct sta_info *sta); + +enum sta_stats_type { + STA_STATS_RATE_TYPE_INVALID = 0, + STA_STATS_RATE_TYPE_LEGACY, + STA_STATS_RATE_TYPE_HT, + STA_STATS_RATE_TYPE_VHT, + STA_STATS_RATE_TYPE_HE, + STA_STATS_RATE_TYPE_S1G, +}; + +#define STA_STATS_FIELD_HT_MCS GENMASK( 7, 0) +#define STA_STATS_FIELD_LEGACY_IDX GENMASK( 3, 0) +#define STA_STATS_FIELD_LEGACY_BAND GENMASK( 7, 4) +#define STA_STATS_FIELD_VHT_MCS GENMASK( 3, 0) +#define STA_STATS_FIELD_VHT_NSS GENMASK( 7, 4) +#define STA_STATS_FIELD_HE_MCS GENMASK( 3, 0) +#define STA_STATS_FIELD_HE_NSS GENMASK( 7, 4) +#define STA_STATS_FIELD_BW GENMASK(11, 8) +#define STA_STATS_FIELD_SGI GENMASK(12, 12) +#define STA_STATS_FIELD_TYPE GENMASK(15, 13) +#define STA_STATS_FIELD_HE_RU GENMASK(18, 16) +#define STA_STATS_FIELD_HE_GI GENMASK(20, 19) +#define STA_STATS_FIELD_HE_DCM GENMASK(21, 21) + +#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; + default: + WARN_ON(1); + return STA_STATS_RATE_INVALID; + } + + return r; +} + +#endif /* STA_INFO_H */ |