[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/net/mac80211/sta_info.c b/src/kernel/linux/v4.14/net/mac80211/sta_info.c
new file mode 100644
index 0000000..6af5fda
--- /dev/null
+++ b/src/kernel/linux/v4.14/net/mac80211/sta_info.c
@@ -0,0 +1,2354 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
+ * Copyright 2013-2014 Intel Mobile Communications GmbH
+ * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
+ * Copyright (C) 2018-2020 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/etherdevice.h>
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/skbuff.h>
+#include <linux/if_arp.h>
+#include <linux/timer.h>
+#include <linux/rtnetlink.h>
+
+#include <net/codel.h>
+#include <net/mac80211.h>
+#include "ieee80211_i.h"
+#include "driver-ops.h"
+#include "rate.h"
+#include "sta_info.h"
+#include "debugfs_sta.h"
+#include "mesh.h"
+#include "wme.h"
+
+/**
+ * DOC: STA information lifetime rules
+ *
+ * STA info structures (&struct sta_info) are managed in a hash table
+ * for faster lookup and a list for iteration. They are managed using
+ * RCU, i.e. access to the list and hash table is protected by RCU.
+ *
+ * Upon allocating a STA info structure with sta_info_alloc(), the caller
+ * owns that structure. It must then insert it into the hash table using
+ * either sta_info_insert() or sta_info_insert_rcu(); only in the latter
+ * case (which acquires an rcu read section but must not be called from
+ * within one) will the pointer still be valid after the call. Note that
+ * the caller may not do much with the STA info before inserting it, in
+ * particular, it may not start any mesh peer link management or add
+ * encryption keys.
+ *
+ * When the insertion fails (sta_info_insert()) returns non-zero), the
+ * structure will have been freed by sta_info_insert()!
+ *
+ * Station entries are added by mac80211 when you establish a link with a
+ * peer. This means different things for the different type of interfaces
+ * we support. For a regular station this mean we add the AP sta when we
+ * receive an association response from the AP. For IBSS this occurs when
+ * get to know about a peer on the same IBSS. For WDS we add the sta for
+ * the peer immediately upon device open. When using AP mode we add stations
+ * for each respective station upon request from userspace through nl80211.
+ *
+ * In order to remove a STA info structure, various sta_info_destroy_*()
+ * calls are available.
+ *
+ * There is no concept of ownership on a STA entry, each structure is
+ * owned by the global hash table/list until it is removed. All users of
+ * the structure need to be RCU protected so that the structure won't be
+ * freed before they are done using it.
+ */
+
+static const struct rhashtable_params sta_rht_params = {
+ .nelem_hint = 3, /* start small */
+ .automatic_shrinking = true,
+ .head_offset = offsetof(struct sta_info, hash_node),
+ .key_offset = offsetof(struct sta_info, addr),
+ .key_len = ETH_ALEN,
+ .max_size = CONFIG_MAC80211_STA_HASH_MAX_SIZE,
+};
+
+/* Caller must hold local->sta_mtx */
+static int sta_info_hash_del(struct ieee80211_local *local,
+ struct sta_info *sta)
+{
+ return rhltable_remove(&local->sta_hash, &sta->hash_node,
+ sta_rht_params);
+}
+
+static void __cleanup_single_sta(struct sta_info *sta)
+{
+ int ac, i;
+ struct tid_ampdu_tx *tid_tx;
+ struct ieee80211_sub_if_data *sdata = sta->sdata;
+ struct ieee80211_local *local = sdata->local;
+ struct fq *fq = &local->fq;
+ struct ps_data *ps;
+
+ if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
+ test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
+ test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
+ if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
+ sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+ ps = &sdata->bss->ps;
+ else if (ieee80211_vif_is_mesh(&sdata->vif))
+ ps = &sdata->u.mesh.ps;
+ else
+ return;
+
+ clear_sta_flag(sta, WLAN_STA_PS_STA);
+ clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
+ clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
+
+ atomic_dec(&ps->num_sta_ps);
+ }
+
+ if (sta->sta.txq[0]) {
+ for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
+ struct txq_info *txqi = to_txq_info(sta->sta.txq[i]);
+
+ spin_lock_bh(&fq->lock);
+ ieee80211_txq_purge(local, txqi);
+ spin_unlock_bh(&fq->lock);
+ }
+ }
+
+ for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
+ local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]);
+ ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]);
+ ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]);
+ }
+
+ if (ieee80211_vif_is_mesh(&sdata->vif))
+ mesh_sta_cleanup(sta);
+
+ cancel_work_sync(&sta->drv_deliver_wk);
+
+ /*
+ * Destroy aggregation state here. It would be nice to wait for the
+ * driver to finish aggregation stop and then clean up, but for now
+ * drivers have to handle aggregation stop being requested, followed
+ * directly by station destruction.
+ */
+ for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
+ kfree(sta->ampdu_mlme.tid_start_tx[i]);
+ tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]);
+ if (!tid_tx)
+ continue;
+ ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending);
+ kfree(tid_tx);
+ }
+}
+
+static void cleanup_single_sta(struct sta_info *sta)
+{
+ struct ieee80211_sub_if_data *sdata = sta->sdata;
+ struct ieee80211_local *local = sdata->local;
+
+ __cleanup_single_sta(sta);
+ sta_info_free(local, sta);
+}
+
+struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local,
+ const u8 *addr)
+{
+ return rhltable_lookup(&local->sta_hash, addr, sta_rht_params);
+}
+
+/* protected by RCU */
+struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
+ const u8 *addr)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct rhlist_head *tmp;
+ struct sta_info *sta;
+
+ rcu_read_lock();
+ for_each_sta_info(local, addr, sta, tmp) {
+ if (sta->sdata == sdata) {
+ rcu_read_unlock();
+ /* this is safe as the caller must already hold
+ * another rcu read section or the mutex
+ */
+ return sta;
+ }
+ }
+ rcu_read_unlock();
+ return NULL;
+}
+
+/*
+ * Get sta info either from the specified interface
+ * or from one of its vlans
+ */
+struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
+ const u8 *addr)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct rhlist_head *tmp;
+ struct sta_info *sta;
+
+ rcu_read_lock();
+ for_each_sta_info(local, addr, sta, tmp) {
+ if (sta->sdata == sdata ||
+ (sta->sdata->bss && sta->sdata->bss == sdata->bss)) {
+ rcu_read_unlock();
+ /* this is safe as the caller must already hold
+ * another rcu read section or the mutex
+ */
+ return sta;
+ }
+ }
+ rcu_read_unlock();
+ return NULL;
+}
+
+struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
+ int idx)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct sta_info *sta;
+ int i = 0;
+
+ list_for_each_entry_rcu(sta, &local->sta_list, list) {
+ if (sdata != sta->sdata)
+ continue;
+ if (i < idx) {
+ ++i;
+ continue;
+ }
+ return sta;
+ }
+
+ return NULL;
+}
+
+/**
+ * sta_info_free - free STA
+ *
+ * @local: pointer to the global information
+ * @sta: STA info to free
+ *
+ * This function must undo everything done by sta_info_alloc()
+ * that may happen before sta_info_insert(). It may only be
+ * called when sta_info_insert() has not been attempted (and
+ * if that fails, the station is freed anyway.)
+ */
+void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
+{
+ if (sta->rate_ctrl)
+ rate_control_free_sta(sta);
+
+ sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr);
+
+ if (sta->sta.txq[0])
+ kfree(to_txq_info(sta->sta.txq[0]));
+ kfree(rcu_dereference_raw(sta->sta.rates));
+#ifdef CONFIG_MAC80211_MESH
+ kfree(sta->mesh);
+#endif
+ free_percpu(sta->pcpu_rx_stats);
+ kfree(sta);
+}
+
+/* Caller must hold local->sta_mtx */
+static int sta_info_hash_add(struct ieee80211_local *local,
+ struct sta_info *sta)
+{
+ return rhltable_insert(&local->sta_hash, &sta->hash_node,
+ sta_rht_params);
+}
+
+static void sta_deliver_ps_frames(struct work_struct *wk)
+{
+ struct sta_info *sta;
+
+ sta = container_of(wk, struct sta_info, drv_deliver_wk);
+
+ if (sta->dead)
+ return;
+
+ local_bh_disable();
+ if (!test_sta_flag(sta, WLAN_STA_PS_STA))
+ ieee80211_sta_ps_deliver_wakeup(sta);
+ else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL))
+ ieee80211_sta_ps_deliver_poll_response(sta);
+ else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD))
+ ieee80211_sta_ps_deliver_uapsd(sta);
+ local_bh_enable();
+}
+
+static int sta_prepare_rate_control(struct ieee80211_local *local,
+ struct sta_info *sta, gfp_t gfp)
+{
+ if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
+ return 0;
+
+ sta->rate_ctrl = local->rate_ctrl;
+ sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
+ sta, gfp);
+ if (!sta->rate_ctrl_priv)
+ return -ENOMEM;
+
+ return 0;
+}
+
+struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
+ const u8 *addr, gfp_t gfp)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_hw *hw = &local->hw;
+ struct sta_info *sta;
+ int i;
+
+ sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp);
+ if (!sta)
+ return NULL;
+
+ if (ieee80211_hw_check(hw, USES_RSS)) {
+ sta->pcpu_rx_stats =
+ alloc_percpu_gfp(struct ieee80211_sta_rx_stats, gfp);
+ if (!sta->pcpu_rx_stats)
+ goto free;
+ }
+
+ spin_lock_init(&sta->lock);
+ spin_lock_init(&sta->ps_lock);
+ INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames);
+ INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
+ mutex_init(&sta->ampdu_mlme.mtx);
+#ifdef CONFIG_MAC80211_MESH
+ if (ieee80211_vif_is_mesh(&sdata->vif)) {
+ sta->mesh = kzalloc(sizeof(*sta->mesh), gfp);
+ if (!sta->mesh)
+ goto free;
+ spin_lock_init(&sta->mesh->plink_lock);
+ if (ieee80211_vif_is_mesh(&sdata->vif) &&
+ !sdata->u.mesh.user_mpm)
+ init_timer(&sta->mesh->plink_timer);
+ sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
+ }
+#endif
+
+ memcpy(sta->addr, addr, ETH_ALEN);
+ memcpy(sta->sta.addr, addr, ETH_ALEN);
+ sta->sta.max_rx_aggregation_subframes =
+ local->hw.max_rx_aggregation_subframes;
+
+ sta->local = local;
+ sta->sdata = sdata;
+ sta->rx_stats.last_rx = jiffies;
+
+ u64_stats_init(&sta->rx_stats.syncp);
+
+ sta->sta_state = IEEE80211_STA_NONE;
+
+ /* Mark TID as unreserved */
+ sta->reserved_tid = IEEE80211_TID_UNRESERVED;
+
+ sta->last_connected = ktime_get_seconds();
+ ewma_signal_init(&sta->rx_stats_avg.signal);
+ for (i = 0; i < ARRAY_SIZE(sta->rx_stats_avg.chain_signal); i++)
+ ewma_signal_init(&sta->rx_stats_avg.chain_signal[i]);
+
+ if (local->ops->wake_tx_queue) {
+ void *txq_data;
+ int size = sizeof(struct txq_info) +
+ ALIGN(hw->txq_data_size, sizeof(void *));
+
+ txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp);
+ if (!txq_data)
+ goto free;
+
+ for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
+ struct txq_info *txq = txq_data + i * size;
+
+ ieee80211_txq_init(sdata, sta, txq, i);
+ }
+ }
+
+ if (sta_prepare_rate_control(local, sta, gfp))
+ goto free_txq;
+
+ for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
+ /*
+ * timer_to_tid must be initialized with identity mapping
+ * to enable session_timer's data differentiation. See
+ * sta_rx_agg_session_timer_expired for usage.
+ */
+ sta->timer_to_tid[i] = i;
+ }
+ for (i = 0; i < IEEE80211_NUM_ACS; i++) {
+ skb_queue_head_init(&sta->ps_tx_buf[i]);
+ skb_queue_head_init(&sta->tx_filtered[i]);
+ }
+
+ for (i = 0; i < IEEE80211_NUM_TIDS; i++)
+ sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
+
+ sta->sta.smps_mode = IEEE80211_SMPS_OFF;
+ if (sdata->vif.type == NL80211_IFTYPE_AP ||
+ sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
+ struct ieee80211_supported_band *sband;
+ u8 smps;
+
+ sband = ieee80211_get_sband(sdata);
+ if (!sband)
+ goto free_txq;
+
+ smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >>
+ IEEE80211_HT_CAP_SM_PS_SHIFT;
+ /*
+ * Assume that hostapd advertises our caps in the beacon and
+ * this is the known_smps_mode for a station that just assciated
+ */
+ switch (smps) {
+ case WLAN_HT_SMPS_CONTROL_DISABLED:
+ sta->known_smps_mode = IEEE80211_SMPS_OFF;
+ break;
+ case WLAN_HT_SMPS_CONTROL_STATIC:
+ sta->known_smps_mode = IEEE80211_SMPS_STATIC;
+ break;
+ case WLAN_HT_SMPS_CONTROL_DYNAMIC:
+ sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC;
+ break;
+ default:
+ WARN_ON(1);
+ }
+ }
+
+ sta->sta.max_rc_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_BA;
+
+ sta->cparams.ce_threshold = CODEL_DISABLED_THRESHOLD;
+ sta->cparams.target = MS2TIME(20);
+ sta->cparams.interval = MS2TIME(100);
+ sta->cparams.ecn = true;
+
+ sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
+
+ return sta;
+
+free_txq:
+ if (sta->sta.txq[0])
+ kfree(to_txq_info(sta->sta.txq[0]));
+free:
+ free_percpu(sta->pcpu_rx_stats);
+#ifdef CONFIG_MAC80211_MESH
+ kfree(sta->mesh);
+#endif
+ kfree(sta);
+ return NULL;
+}
+
+static int sta_info_insert_check(struct sta_info *sta)
+{
+ struct ieee80211_sub_if_data *sdata = sta->sdata;
+
+ /*
+ * Can't be a WARN_ON because it can be triggered through a race:
+ * something inserts a STA (on one CPU) without holding the RTNL
+ * and another CPU turns off the net device.
+ */
+ if (unlikely(!ieee80211_sdata_running(sdata)))
+ return -ENETDOWN;
+
+ if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
+ is_multicast_ether_addr(sta->sta.addr)))
+ return -EINVAL;
+
+ /* The RCU read lock is required by rhashtable due to
+ * asynchronous resize/rehash. We also require the mutex
+ * for correctness.
+ */
+ rcu_read_lock();
+ lockdep_assert_held(&sdata->local->sta_mtx);
+ if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) &&
+ ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) {
+ rcu_read_unlock();
+ return -ENOTUNIQ;
+ }
+ rcu_read_unlock();
+
+ return 0;
+}
+
+static int sta_info_insert_drv_state(struct ieee80211_local *local,
+ struct ieee80211_sub_if_data *sdata,
+ struct sta_info *sta)
+{
+ enum ieee80211_sta_state state;
+ int err = 0;
+
+ for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
+ err = drv_sta_state(local, sdata, sta, state, state + 1);
+ if (err)
+ break;
+ }
+
+ if (!err) {
+ /*
+ * Drivers using legacy sta_add/sta_remove callbacks only
+ * get uploaded set to true after sta_add is called.
+ */
+ if (!local->ops->sta_add)
+ sta->uploaded = true;
+ return 0;
+ }
+
+ if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
+ sdata_info(sdata,
+ "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
+ sta->sta.addr, state + 1, err);
+ err = 0;
+ }
+
+ /* unwind on error */
+ for (; state > IEEE80211_STA_NOTEXIST; state--)
+ WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1));
+
+ return err;
+}
+
+/*
+ * should be called with sta_mtx locked
+ * this function replaces the mutex lock
+ * with a RCU lock
+ */
+static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
+{
+ struct ieee80211_local *local = sta->local;
+ struct ieee80211_sub_if_data *sdata = sta->sdata;
+ struct station_info *sinfo = NULL;
+ int err = 0;
+
+ lockdep_assert_held(&local->sta_mtx);
+
+ /* check if STA exists already */
+ if (sta_info_get_bss(sdata, sta->sta.addr)) {
+ err = -EEXIST;
+ goto out_err;
+ }
+
+ sinfo = kzalloc(sizeof(struct station_info), GFP_KERNEL);
+ if (!sinfo) {
+ err = -ENOMEM;
+ goto out_err;
+ }
+
+ local->num_sta++;
+ local->sta_generation++;
+ smp_mb();
+
+ /* simplify things and don't accept BA sessions yet */
+ set_sta_flag(sta, WLAN_STA_BLOCK_BA);
+
+ /* make the station visible */
+ err = sta_info_hash_add(local, sta);
+ if (err)
+ goto out_drop_sta;
+
+ list_add_tail_rcu(&sta->list, &local->sta_list);
+
+ /* notify driver */
+ err = sta_info_insert_drv_state(local, sdata, sta);
+ if (err)
+ goto out_remove;
+
+ set_sta_flag(sta, WLAN_STA_INSERTED);
+ /* accept BA sessions now */
+ clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
+
+ ieee80211_sta_debugfs_add(sta);
+ rate_control_add_sta_debugfs(sta);
+
+ sinfo->generation = local->sta_generation;
+ cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
+ kfree(sinfo);
+
+ sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr);
+
+ /* move reference to rcu-protected */
+ rcu_read_lock();
+ mutex_unlock(&local->sta_mtx);
+
+ if (ieee80211_vif_is_mesh(&sdata->vif))
+ mesh_accept_plinks_update(sdata);
+
+ return 0;
+ out_remove:
+ sta_info_hash_del(local, sta);
+ list_del_rcu(&sta->list);
+ out_drop_sta:
+ local->num_sta--;
+ synchronize_net();
+ __cleanup_single_sta(sta);
+ out_err:
+ mutex_unlock(&local->sta_mtx);
+ kfree(sinfo);
+ rcu_read_lock();
+ return err;
+}
+
+int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
+{
+ struct ieee80211_local *local = sta->local;
+ int err;
+
+ might_sleep();
+
+ mutex_lock(&local->sta_mtx);
+
+ err = sta_info_insert_check(sta);
+ if (err) {
+ mutex_unlock(&local->sta_mtx);
+ rcu_read_lock();
+ goto out_free;
+ }
+
+ err = sta_info_insert_finish(sta);
+ if (err)
+ goto out_free;
+
+ return 0;
+ out_free:
+ sta_info_free(local, sta);
+ return err;
+}
+
+int sta_info_insert(struct sta_info *sta)
+{
+ int err = sta_info_insert_rcu(sta);
+
+ rcu_read_unlock();
+
+ return err;
+}
+
+static inline void __bss_tim_set(u8 *tim, u16 id)
+{
+ /*
+ * This format has been mandated by the IEEE specifications,
+ * so this line may not be changed to use the __set_bit() format.
+ */
+ tim[id / 8] |= (1 << (id % 8));
+}
+
+static inline void __bss_tim_clear(u8 *tim, u16 id)
+{
+ /*
+ * This format has been mandated by the IEEE specifications,
+ * so this line may not be changed to use the __clear_bit() format.
+ */
+ tim[id / 8] &= ~(1 << (id % 8));
+}
+
+static inline bool __bss_tim_get(u8 *tim, u16 id)
+{
+ /*
+ * This format has been mandated by the IEEE specifications,
+ * so this line may not be changed to use the test_bit() format.
+ */
+ return tim[id / 8] & (1 << (id % 8));
+}
+
+static unsigned long ieee80211_tids_for_ac(int ac)
+{
+ /* If we ever support TIDs > 7, this obviously needs to be adjusted */
+ switch (ac) {
+ case IEEE80211_AC_VO:
+ return BIT(6) | BIT(7);
+ case IEEE80211_AC_VI:
+ return BIT(4) | BIT(5);
+ case IEEE80211_AC_BE:
+ return BIT(0) | BIT(3);
+ case IEEE80211_AC_BK:
+ return BIT(1) | BIT(2);
+ default:
+ WARN_ON(1);
+ return 0;
+ }
+}
+
+static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending)
+{
+ struct ieee80211_local *local = sta->local;
+ struct ps_data *ps;
+ bool indicate_tim = false;
+ u8 ignore_for_tim = sta->sta.uapsd_queues;
+ int ac;
+ u16 id = sta->sta.aid;
+
+ if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
+ sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
+ if (WARN_ON_ONCE(!sta->sdata->bss))
+ return;
+
+ ps = &sta->sdata->bss->ps;
+#ifdef CONFIG_MAC80211_MESH
+ } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
+ ps = &sta->sdata->u.mesh.ps;
+#endif
+ } else {
+ return;
+ }
+
+ /* No need to do anything if the driver does all */
+ if (ieee80211_hw_check(&local->hw, AP_LINK_PS) && !local->ops->set_tim)
+ return;
+
+ if (sta->dead)
+ goto done;
+
+ /*
+ * If all ACs are delivery-enabled then we should build
+ * the TIM bit for all ACs anyway; if only some are then
+ * we ignore those and build the TIM bit using only the
+ * non-enabled ones.
+ */
+ if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1)
+ ignore_for_tim = 0;
+
+ if (ignore_pending)
+ ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1;
+
+ for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
+ unsigned long tids;
+
+ if (ignore_for_tim & ieee80211_ac_to_qos_mask[ac])
+ continue;
+
+ indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) ||
+ !skb_queue_empty(&sta->ps_tx_buf[ac]);
+ if (indicate_tim)
+ break;
+
+ tids = ieee80211_tids_for_ac(ac);
+
+ indicate_tim |=
+ sta->driver_buffered_tids & tids;
+ indicate_tim |=
+ sta->txq_buffered_tids & tids;
+ }
+
+ done:
+ spin_lock_bh(&local->tim_lock);
+
+ if (indicate_tim == __bss_tim_get(ps->tim, id))
+ goto out_unlock;
+
+ if (indicate_tim)
+ __bss_tim_set(ps->tim, id);
+ else
+ __bss_tim_clear(ps->tim, id);
+
+ if (local->ops->set_tim && !WARN_ON(sta->dead)) {
+ local->tim_in_locked_section = true;
+ drv_set_tim(local, &sta->sta, indicate_tim);
+ local->tim_in_locked_section = false;
+ }
+
+out_unlock:
+ spin_unlock_bh(&local->tim_lock);
+}
+
+void sta_info_recalc_tim(struct sta_info *sta)
+{
+ __sta_info_recalc_tim(sta, false);
+}
+
+static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
+{
+ struct ieee80211_tx_info *info;
+ int timeout;
+
+ if (!skb)
+ return false;
+
+ info = IEEE80211_SKB_CB(skb);
+
+ /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
+ timeout = (sta->listen_interval *
+ sta->sdata->vif.bss_conf.beacon_int *
+ 32 / 15625) * HZ;
+ if (timeout < STA_TX_BUFFER_EXPIRE)
+ timeout = STA_TX_BUFFER_EXPIRE;
+ return time_after(jiffies, info->control.jiffies + timeout);
+}
+
+
+static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
+ struct sta_info *sta, int ac)
+{
+ unsigned long flags;
+ struct sk_buff *skb;
+
+ /*
+ * First check for frames that should expire on the filtered
+ * queue. Frames here were rejected by the driver and are on
+ * a separate queue to avoid reordering with normal PS-buffered
+ * frames. They also aren't accounted for right now in the
+ * total_ps_buffered counter.
+ */
+ for (;;) {
+ spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
+ skb = skb_peek(&sta->tx_filtered[ac]);
+ if (sta_info_buffer_expired(sta, skb))
+ skb = __skb_dequeue(&sta->tx_filtered[ac]);
+ else
+ skb = NULL;
+ spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
+
+ /*
+ * Frames are queued in order, so if this one
+ * hasn't expired yet we can stop testing. If
+ * we actually reached the end of the queue we
+ * also need to stop, of course.
+ */
+ if (!skb)
+ break;
+ ieee80211_free_txskb(&local->hw, skb);
+ }
+
+ /*
+ * Now also check the normal PS-buffered queue, this will
+ * only find something if the filtered queue was emptied
+ * since the filtered frames are all before the normal PS
+ * buffered frames.
+ */
+ for (;;) {
+ spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
+ skb = skb_peek(&sta->ps_tx_buf[ac]);
+ if (sta_info_buffer_expired(sta, skb))
+ skb = __skb_dequeue(&sta->ps_tx_buf[ac]);
+ else
+ skb = NULL;
+ spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
+
+ /*
+ * frames are queued in order, so if this one
+ * hasn't expired yet (or we reached the end of
+ * the queue) we can stop testing
+ */
+ if (!skb)
+ break;
+
+ local->total_ps_buffered--;
+ ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n",
+ sta->sta.addr);
+ ieee80211_free_txskb(&local->hw, skb);
+ }
+
+ /*
+ * Finally, recalculate the TIM bit for this station -- it might
+ * now be clear because the station was too slow to retrieve its
+ * frames.
+ */
+ sta_info_recalc_tim(sta);
+
+ /*
+ * Return whether there are any frames still buffered, this is
+ * used to check whether the cleanup timer still needs to run,
+ * if there are no frames we don't need to rearm the timer.
+ */
+ return !(skb_queue_empty(&sta->ps_tx_buf[ac]) &&
+ skb_queue_empty(&sta->tx_filtered[ac]));
+}
+
+static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
+ struct sta_info *sta)
+{
+ bool have_buffered = false;
+ int ac;
+
+ /* This is only necessary for stations on BSS/MBSS interfaces */
+ if (!sta->sdata->bss &&
+ !ieee80211_vif_is_mesh(&sta->sdata->vif))
+ return false;
+
+ for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
+ have_buffered |=
+ sta_info_cleanup_expire_buffered_ac(local, sta, ac);
+
+ return have_buffered;
+}
+
+static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
+{
+ struct ieee80211_local *local;
+ struct ieee80211_sub_if_data *sdata;
+ int ret;
+
+ might_sleep();
+
+ if (!sta)
+ return -ENOENT;
+
+ local = sta->local;
+ sdata = sta->sdata;
+
+ lockdep_assert_held(&local->sta_mtx);
+
+ /*
+ * Before removing the station from the driver and
+ * rate control, it might still start new aggregation
+ * sessions -- block that to make sure the tear-down
+ * will be sufficient.
+ */
+ set_sta_flag(sta, WLAN_STA_BLOCK_BA);
+ ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
+
+ /*
+ * Before removing the station from the driver there might be pending
+ * rx frames on RSS queues sent prior to the disassociation - wait for
+ * all such frames to be processed.
+ */
+ drv_sync_rx_queues(local, sta);
+
+ ret = sta_info_hash_del(local, sta);
+ if (WARN_ON(ret))
+ return ret;
+
+ /*
+ * for TDLS peers, make sure to return to the base channel before
+ * removal.
+ */
+ if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) {
+ drv_tdls_cancel_channel_switch(local, sdata, &sta->sta);
+ clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
+ }
+
+ list_del_rcu(&sta->list);
+ sta->removed = true;
+
+ drv_sta_pre_rcu_remove(local, sta->sdata, sta);
+
+ if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
+ rcu_access_pointer(sdata->u.vlan.sta) == sta)
+ RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
+
+ return 0;
+}
+
+static void __sta_info_destroy_part2(struct sta_info *sta)
+{
+ struct ieee80211_local *local = sta->local;
+ struct ieee80211_sub_if_data *sdata = sta->sdata;
+ struct station_info *sinfo;
+ int ret;
+
+ /*
+ * NOTE: This assumes at least synchronize_net() was done
+ * after _part1 and before _part2!
+ */
+
+ might_sleep();
+ lockdep_assert_held(&local->sta_mtx);
+
+ if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
+ ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
+ WARN_ON_ONCE(ret);
+ }
+
+ /* now keys can no longer be reached */
+ ieee80211_free_sta_keys(local, sta);
+
+ /* disable TIM bit - last chance to tell driver */
+ __sta_info_recalc_tim(sta, true);
+
+ sta->dead = true;
+
+ local->num_sta--;
+ local->sta_generation++;
+
+ while (sta->sta_state > IEEE80211_STA_NONE) {
+ ret = sta_info_move_state(sta, sta->sta_state - 1);
+ if (ret) {
+ WARN_ON_ONCE(1);
+ break;
+ }
+ }
+
+ if (sta->uploaded) {
+ ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
+ IEEE80211_STA_NOTEXIST);
+ WARN_ON_ONCE(ret != 0);
+ }
+
+ sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr);
+
+ sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
+ if (sinfo)
+ sta_set_sinfo(sta, sinfo);
+ cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
+ kfree(sinfo);
+
+ rate_control_remove_sta_debugfs(sta);
+ ieee80211_sta_debugfs_remove(sta);
+
+ cleanup_single_sta(sta);
+}
+
+int __must_check __sta_info_destroy(struct sta_info *sta)
+{
+ int err = __sta_info_destroy_part1(sta);
+
+ if (err)
+ return err;
+
+ synchronize_net();
+
+ __sta_info_destroy_part2(sta);
+
+ return 0;
+}
+
+int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr)
+{
+ struct sta_info *sta;
+ int ret;
+
+ mutex_lock(&sdata->local->sta_mtx);
+ sta = sta_info_get(sdata, addr);
+ ret = __sta_info_destroy(sta);
+ mutex_unlock(&sdata->local->sta_mtx);
+
+ return ret;
+}
+
+int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
+ const u8 *addr)
+{
+ struct sta_info *sta;
+ int ret;
+
+ mutex_lock(&sdata->local->sta_mtx);
+ sta = sta_info_get_bss(sdata, addr);
+ ret = __sta_info_destroy(sta);
+ mutex_unlock(&sdata->local->sta_mtx);
+
+ return ret;
+}
+
+static void sta_info_cleanup(unsigned long data)
+{
+ struct ieee80211_local *local = (struct ieee80211_local *) data;
+ struct sta_info *sta;
+ bool timer_needed = false;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(sta, &local->sta_list, list)
+ if (sta_info_cleanup_expire_buffered(local, sta))
+ timer_needed = true;
+ rcu_read_unlock();
+
+ if (local->quiescing)
+ return;
+
+ if (!timer_needed)
+ return;
+
+ mod_timer(&local->sta_cleanup,
+ round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL));
+}
+
+int sta_info_init(struct ieee80211_local *local)
+{
+ int err;
+
+ err = rhltable_init(&local->sta_hash, &sta_rht_params);
+ if (err)
+ return err;
+
+ spin_lock_init(&local->tim_lock);
+ mutex_init(&local->sta_mtx);
+ INIT_LIST_HEAD(&local->sta_list);
+
+ setup_timer(&local->sta_cleanup, sta_info_cleanup,
+ (unsigned long)local);
+ return 0;
+}
+
+void sta_info_stop(struct ieee80211_local *local)
+{
+ del_timer_sync(&local->sta_cleanup);
+ rhltable_destroy(&local->sta_hash);
+}
+
+
+int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct sta_info *sta, *tmp;
+ LIST_HEAD(free_list);
+ int ret = 0;
+
+ might_sleep();
+
+ WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP);
+ WARN_ON(vlans && !sdata->bss);
+
+ mutex_lock(&local->sta_mtx);
+ list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
+ if (sdata == sta->sdata ||
+ (vlans && sdata->bss == sta->sdata->bss)) {
+ if (!WARN_ON(__sta_info_destroy_part1(sta)))
+ list_add(&sta->free_list, &free_list);
+ ret++;
+ }
+ }
+
+ if (!list_empty(&free_list)) {
+ synchronize_net();
+ list_for_each_entry_safe(sta, tmp, &free_list, free_list)
+ __sta_info_destroy_part2(sta);
+ }
+ mutex_unlock(&local->sta_mtx);
+
+ return ret;
+}
+
+void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
+ unsigned long exp_time)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct sta_info *sta, *tmp;
+
+ mutex_lock(&local->sta_mtx);
+
+ list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
+ unsigned long last_active = ieee80211_sta_last_active(sta);
+
+ if (sdata != sta->sdata)
+ continue;
+
+ if (time_is_before_jiffies(last_active + exp_time)) {
+ sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
+ sta->sta.addr);
+
+ if (ieee80211_vif_is_mesh(&sdata->vif) &&
+ test_sta_flag(sta, WLAN_STA_PS_STA))
+ atomic_dec(&sdata->u.mesh.ps.num_sta_ps);
+
+ WARN_ON(__sta_info_destroy(sta));
+ }
+ }
+
+ mutex_unlock(&local->sta_mtx);
+}
+
+struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
+ const u8 *addr,
+ const u8 *localaddr)
+{
+ struct ieee80211_local *local = hw_to_local(hw);
+ struct rhlist_head *tmp;
+ struct sta_info *sta;
+
+ /*
+ * Just return a random station if localaddr is NULL
+ * ... first in list.
+ */
+ for_each_sta_info(local, addr, sta, tmp) {
+ if (localaddr &&
+ !ether_addr_equal(sta->sdata->vif.addr, localaddr))
+ continue;
+ if (!sta->uploaded)
+ return NULL;
+ return &sta->sta;
+ }
+
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr);
+
+struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
+ const u8 *addr)
+{
+ struct sta_info *sta;
+
+ if (!vif)
+ return NULL;
+
+ sta = sta_info_get_bss(vif_to_sdata(vif), addr);
+ if (!sta)
+ return NULL;
+
+ if (!sta->uploaded)
+ return NULL;
+
+ return &sta->sta;
+}
+EXPORT_SYMBOL(ieee80211_find_sta);
+
+/* powersave support code */
+void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
+{
+ struct ieee80211_sub_if_data *sdata = sta->sdata;
+ struct ieee80211_local *local = sdata->local;
+ struct sk_buff_head pending;
+ int filtered = 0, buffered = 0, ac, i;
+ unsigned long flags;
+ struct ps_data *ps;
+
+ if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+ sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
+ u.ap);
+
+ if (sdata->vif.type == NL80211_IFTYPE_AP)
+ ps = &sdata->bss->ps;
+ else if (ieee80211_vif_is_mesh(&sdata->vif))
+ ps = &sdata->u.mesh.ps;
+ else
+ return;
+
+ clear_sta_flag(sta, WLAN_STA_SP);
+
+ BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1);
+ sta->driver_buffered_tids = 0;
+ sta->txq_buffered_tids = 0;
+
+ if (!ieee80211_hw_check(&local->hw, AP_LINK_PS))
+ drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
+
+ if (sta->sta.txq[0]) {
+ for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
+ if (!txq_has_queue(sta->sta.txq[i]))
+ continue;
+
+ drv_wake_tx_queue(local, to_txq_info(sta->sta.txq[i]));
+ }
+ }
+
+ skb_queue_head_init(&pending);
+
+ /* sync with ieee80211_tx_h_unicast_ps_buf */
+ spin_lock(&sta->ps_lock);
+ /* Send all buffered frames to the station */
+ for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
+ int count = skb_queue_len(&pending), tmp;
+
+ spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
+ skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending);
+ spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
+ tmp = skb_queue_len(&pending);
+ filtered += tmp - count;
+ count = tmp;
+
+ spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
+ skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending);
+ spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
+ tmp = skb_queue_len(&pending);
+ buffered += tmp - count;
+ }
+
+ ieee80211_add_pending_skbs(local, &pending);
+
+ /* now we're no longer in the deliver code */
+ clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
+
+ /* The station might have polled and then woken up before we responded,
+ * so clear these flags now to avoid them sticking around.
+ */
+ clear_sta_flag(sta, WLAN_STA_PSPOLL);
+ clear_sta_flag(sta, WLAN_STA_UAPSD);
+ spin_unlock(&sta->ps_lock);
+
+ atomic_dec(&ps->num_sta_ps);
+
+ /* This station just woke up and isn't aware of our SMPS state */
+ if (!ieee80211_vif_is_mesh(&sdata->vif) &&
+ !ieee80211_smps_is_restrictive(sta->known_smps_mode,
+ sdata->smps_mode) &&
+ sta->known_smps_mode != sdata->bss->req_smps &&
+ sta_info_tx_streams(sta) != 1) {
+ ht_dbg(sdata,
+ "%pM just woke up and MIMO capable - update SMPS\n",
+ sta->sta.addr);
+ ieee80211_send_smps_action(sdata, sdata->bss->req_smps,
+ sta->sta.addr,
+ sdata->vif.bss_conf.bssid);
+ }
+
+ local->total_ps_buffered -= buffered;
+
+ sta_info_recalc_tim(sta);
+
+ ps_dbg(sdata,
+ "STA %pM aid %d sending %d filtered/%d PS frames since STA woke up\n",
+ sta->sta.addr, sta->sta.aid, filtered, buffered);
+
+ ieee80211_check_fast_xmit(sta);
+}
+
+static void ieee80211_send_null_response(struct sta_info *sta, int tid,
+ enum ieee80211_frame_release_type reason,
+ bool call_driver, bool more_data)
+{
+ struct ieee80211_sub_if_data *sdata = sta->sdata;
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_qos_hdr *nullfunc;
+ struct sk_buff *skb;
+ int size = sizeof(*nullfunc);
+ __le16 fc;
+ bool qos = sta->sta.wme;
+ struct ieee80211_tx_info *info;
+ struct ieee80211_chanctx_conf *chanctx_conf;
+
+ if (qos) {
+ fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
+ IEEE80211_STYPE_QOS_NULLFUNC |
+ IEEE80211_FCTL_FROMDS);
+ } else {
+ size -= 2;
+ fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
+ IEEE80211_STYPE_NULLFUNC |
+ IEEE80211_FCTL_FROMDS);
+ }
+
+ skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
+ if (!skb)
+ return;
+
+ skb_reserve(skb, local->hw.extra_tx_headroom);
+
+ nullfunc = skb_put(skb, size);
+ nullfunc->frame_control = fc;
+ nullfunc->duration_id = 0;
+ memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
+ memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
+ memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
+ nullfunc->seq_ctrl = 0;
+
+ skb->priority = tid;
+ skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
+ if (qos) {
+ nullfunc->qos_ctrl = cpu_to_le16(tid);
+
+ if (reason == IEEE80211_FRAME_RELEASE_UAPSD) {
+ nullfunc->qos_ctrl |=
+ cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
+ if (more_data)
+ nullfunc->frame_control |=
+ cpu_to_le16(IEEE80211_FCTL_MOREDATA);
+ }
+ }
+
+ info = IEEE80211_SKB_CB(skb);
+
+ /*
+ * Tell TX path to send this frame even though the
+ * STA may still remain is PS mode after this frame
+ * exchange. Also set EOSP to indicate this packet
+ * ends the poll/service period.
+ */
+ info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
+ IEEE80211_TX_STATUS_EOSP |
+ IEEE80211_TX_CTL_REQ_TX_STATUS;
+
+ info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
+
+ if (call_driver)
+ drv_allow_buffered_frames(local, sta, BIT(tid), 1,
+ reason, false);
+
+ skb->dev = sdata->dev;
+
+ rcu_read_lock();
+ chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+ if (WARN_ON(!chanctx_conf)) {
+ rcu_read_unlock();
+ kfree_skb(skb);
+ return;
+ }
+
+ info->band = chanctx_conf->def.chan->band;
+ ieee80211_xmit(sdata, sta, skb);
+ rcu_read_unlock();
+}
+
+static int find_highest_prio_tid(unsigned long tids)
+{
+ /* lower 3 TIDs aren't ordered perfectly */
+ if (tids & 0xF8)
+ return fls(tids) - 1;
+ /* TID 0 is BE just like TID 3 */
+ if (tids & BIT(0))
+ return 0;
+ return fls(tids) - 1;
+}
+
+/* Indicates if the MORE_DATA bit should be set in the last
+ * frame obtained by ieee80211_sta_ps_get_frames.
+ * Note that driver_release_tids is relevant only if
+ * reason = IEEE80211_FRAME_RELEASE_PSPOLL
+ */
+static bool
+ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs,
+ enum ieee80211_frame_release_type reason,
+ unsigned long driver_release_tids)
+{
+ int ac;
+
+ /* If the driver has data on more than one TID then
+ * certainly there's more data if we release just a
+ * single frame now (from a single TID). This will
+ * only happen for PS-Poll.
+ */
+ if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
+ hweight16(driver_release_tids) > 1)
+ return true;
+
+ for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
+ if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
+ continue;
+
+ if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
+ !skb_queue_empty(&sta->ps_tx_buf[ac]))
+ return true;
+ }
+
+ return false;
+}
+
+static void
+ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs,
+ enum ieee80211_frame_release_type reason,
+ struct sk_buff_head *frames,
+ unsigned long *driver_release_tids)
+{
+ struct ieee80211_sub_if_data *sdata = sta->sdata;
+ struct ieee80211_local *local = sdata->local;
+ int ac;
+
+ /* Get response frame(s) and more data bit for the last one. */
+ for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
+ unsigned long tids;
+
+ if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
+ continue;
+
+ tids = ieee80211_tids_for_ac(ac);
+
+ /* if we already have frames from software, then we can't also
+ * release from hardware queues
+ */
+ if (skb_queue_empty(frames)) {
+ *driver_release_tids |=
+ sta->driver_buffered_tids & tids;
+ *driver_release_tids |= sta->txq_buffered_tids & tids;
+ }
+
+ if (!*driver_release_tids) {
+ struct sk_buff *skb;
+
+ while (n_frames > 0) {
+ skb = skb_dequeue(&sta->tx_filtered[ac]);
+ if (!skb) {
+ skb = skb_dequeue(
+ &sta->ps_tx_buf[ac]);
+ if (skb)
+ local->total_ps_buffered--;
+ }
+ if (!skb)
+ break;
+ n_frames--;
+ __skb_queue_tail(frames, skb);
+ }
+ }
+
+ /* If we have more frames buffered on this AC, then abort the
+ * loop since we can't send more data from other ACs before
+ * the buffered frames from this.
+ */
+ if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
+ !skb_queue_empty(&sta->ps_tx_buf[ac]))
+ break;
+ }
+}
+
+static void
+ieee80211_sta_ps_deliver_response(struct sta_info *sta,
+ int n_frames, u8 ignored_acs,
+ enum ieee80211_frame_release_type reason)
+{
+ struct ieee80211_sub_if_data *sdata = sta->sdata;
+ struct ieee80211_local *local = sdata->local;
+ unsigned long driver_release_tids = 0;
+ struct sk_buff_head frames;
+ bool more_data;
+
+ /* Service or PS-Poll period starts */
+ set_sta_flag(sta, WLAN_STA_SP);
+
+ __skb_queue_head_init(&frames);
+
+ ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason,
+ &frames, &driver_release_tids);
+
+ more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids);
+
+ if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL)
+ driver_release_tids =
+ BIT(find_highest_prio_tid(driver_release_tids));
+
+ if (skb_queue_empty(&frames) && !driver_release_tids) {
+ int tid, ac;
+
+ /*
+ * For PS-Poll, this can only happen due to a race condition
+ * when we set the TIM bit and the station notices it, but
+ * before it can poll for the frame we expire it.
+ *
+ * For uAPSD, this is said in the standard (11.2.1.5 h):
+ * At each unscheduled SP for a non-AP STA, the AP shall
+ * attempt to transmit at least one MSDU or MMPDU, but no
+ * more than the value specified in the Max SP Length field
+ * in the QoS Capability element from delivery-enabled ACs,
+ * that are destined for the non-AP STA.
+ *
+ * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
+ */
+
+ /* This will evaluate to 1, 3, 5 or 7. */
+ for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++)
+ if (!(ignored_acs & ieee80211_ac_to_qos_mask[ac]))
+ break;
+ tid = 7 - 2 * ac;
+
+ ieee80211_send_null_response(sta, tid, reason, true, false);
+ } else if (!driver_release_tids) {
+ struct sk_buff_head pending;
+ struct sk_buff *skb;
+ int num = 0;
+ u16 tids = 0;
+ bool need_null = false;
+
+ skb_queue_head_init(&pending);
+
+ while ((skb = __skb_dequeue(&frames))) {
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_hdr *hdr = (void *) skb->data;
+ u8 *qoshdr = NULL;
+
+ num++;
+
+ /*
+ * Tell TX path to send this frame even though the
+ * STA may still remain is PS mode after this frame
+ * exchange.
+ */
+ info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
+ info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
+
+ /*
+ * Use MoreData flag to indicate whether there are
+ * more buffered frames for this STA
+ */
+ if (more_data || !skb_queue_empty(&frames))
+ hdr->frame_control |=
+ cpu_to_le16(IEEE80211_FCTL_MOREDATA);
+ else
+ hdr->frame_control &=
+ cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
+
+ if (ieee80211_is_data_qos(hdr->frame_control) ||
+ ieee80211_is_qos_nullfunc(hdr->frame_control))
+ qoshdr = ieee80211_get_qos_ctl(hdr);
+
+ tids |= BIT(skb->priority);
+
+ __skb_queue_tail(&pending, skb);
+
+ /* end service period after last frame or add one */
+ if (!skb_queue_empty(&frames))
+ continue;
+
+ if (reason != IEEE80211_FRAME_RELEASE_UAPSD) {
+ /* for PS-Poll, there's only one frame */
+ info->flags |= IEEE80211_TX_STATUS_EOSP |
+ IEEE80211_TX_CTL_REQ_TX_STATUS;
+ break;
+ }
+
+ /* For uAPSD, things are a bit more complicated. If the
+ * last frame has a QoS header (i.e. is a QoS-data or
+ * QoS-nulldata frame) then just set the EOSP bit there
+ * and be done.
+ * If the frame doesn't have a QoS header (which means
+ * it should be a bufferable MMPDU) then we can't set
+ * the EOSP bit in the QoS header; add a QoS-nulldata
+ * frame to the list to send it after the MMPDU.
+ *
+ * Note that this code is only in the mac80211-release
+ * code path, we assume that the driver will not buffer
+ * anything but QoS-data frames, or if it does, will
+ * create the QoS-nulldata frame by itself if needed.
+ *
+ * Cf. 802.11-2012 10.2.1.10 (c).
+ */
+ if (qoshdr) {
+ *qoshdr |= IEEE80211_QOS_CTL_EOSP;
+
+ info->flags |= IEEE80211_TX_STATUS_EOSP |
+ IEEE80211_TX_CTL_REQ_TX_STATUS;
+ } else {
+ /* The standard isn't completely clear on this
+ * as it says the more-data bit should be set
+ * if there are more BUs. The QoS-Null frame
+ * we're about to send isn't buffered yet, we
+ * only create it below, but let's pretend it
+ * was buffered just in case some clients only
+ * expect more-data=0 when eosp=1.
+ */
+ hdr->frame_control |=
+ cpu_to_le16(IEEE80211_FCTL_MOREDATA);
+ need_null = true;
+ num++;
+ }
+ break;
+ }
+
+ drv_allow_buffered_frames(local, sta, tids, num,
+ reason, more_data);
+
+ ieee80211_add_pending_skbs(local, &pending);
+
+ if (need_null)
+ ieee80211_send_null_response(
+ sta, find_highest_prio_tid(tids),
+ reason, false, false);
+
+ sta_info_recalc_tim(sta);
+ } else {
+ int tid;
+
+ /*
+ * We need to release a frame that is buffered somewhere in the
+ * driver ... it'll have to handle that.
+ * Note that the driver also has to check the number of frames
+ * on the TIDs we're releasing from - if there are more than
+ * n_frames it has to set the more-data bit (if we didn't ask
+ * it to set it anyway due to other buffered frames); if there
+ * are fewer than n_frames it has to make sure to adjust that
+ * to allow the service period to end properly.
+ */
+ drv_release_buffered_frames(local, sta, driver_release_tids,
+ n_frames, reason, more_data);
+
+ /*
+ * Note that we don't recalculate the TIM bit here as it would
+ * most likely have no effect at all unless the driver told us
+ * that the TID(s) became empty before returning here from the
+ * release function.
+ * Either way, however, when the driver tells us that the TID(s)
+ * became empty or we find that a txq became empty, we'll do the
+ * TIM recalculation.
+ */
+
+ if (!sta->sta.txq[0])
+ return;
+
+ for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) {
+ if (!(driver_release_tids & BIT(tid)) ||
+ txq_has_queue(sta->sta.txq[tid]))
+ continue;
+
+ sta_info_recalc_tim(sta);
+ break;
+ }
+ }
+}
+
+void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
+{
+ u8 ignore_for_response = sta->sta.uapsd_queues;
+
+ /*
+ * If all ACs are delivery-enabled then we should reply
+ * from any of them, if only some are enabled we reply
+ * only from the non-enabled ones.
+ */
+ if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1)
+ ignore_for_response = 0;
+
+ ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response,
+ IEEE80211_FRAME_RELEASE_PSPOLL);
+}
+
+void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
+{
+ int n_frames = sta->sta.max_sp;
+ u8 delivery_enabled = sta->sta.uapsd_queues;
+
+ /*
+ * If we ever grow support for TSPEC this might happen if
+ * the TSPEC update from hostapd comes in between a trigger
+ * frame setting WLAN_STA_UAPSD in the RX path and this
+ * actually getting called.
+ */
+ if (!delivery_enabled)
+ return;
+
+ switch (sta->sta.max_sp) {
+ case 1:
+ n_frames = 2;
+ break;
+ case 2:
+ n_frames = 4;
+ break;
+ case 3:
+ n_frames = 6;
+ break;
+ case 0:
+ /* XXX: what is a good value? */
+ n_frames = 128;
+ break;
+ }
+
+ ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled,
+ IEEE80211_FRAME_RELEASE_UAPSD);
+}
+
+void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
+ struct ieee80211_sta *pubsta, bool block)
+{
+ struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
+
+ trace_api_sta_block_awake(sta->local, pubsta, block);
+
+ if (block) {
+ set_sta_flag(sta, WLAN_STA_PS_DRIVER);
+ ieee80211_clear_fast_xmit(sta);
+ return;
+ }
+
+ if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
+ return;
+
+ if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
+ set_sta_flag(sta, WLAN_STA_PS_DELIVER);
+ clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
+ ieee80211_queue_work(hw, &sta->drv_deliver_wk);
+ } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) ||
+ test_sta_flag(sta, WLAN_STA_UAPSD)) {
+ /* must be asleep in this case */
+ clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
+ ieee80211_queue_work(hw, &sta->drv_deliver_wk);
+ } else {
+ clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
+ ieee80211_check_fast_xmit(sta);
+ }
+}
+EXPORT_SYMBOL(ieee80211_sta_block_awake);
+
+void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
+{
+ struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
+ struct ieee80211_local *local = sta->local;
+
+ trace_api_eosp(local, pubsta);
+
+ clear_sta_flag(sta, WLAN_STA_SP);
+}
+EXPORT_SYMBOL(ieee80211_sta_eosp);
+
+void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid)
+{
+ struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
+ enum ieee80211_frame_release_type reason;
+ bool more_data;
+
+ trace_api_send_eosp_nullfunc(sta->local, pubsta, tid);
+
+ reason = IEEE80211_FRAME_RELEASE_UAPSD;
+ more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues,
+ reason, 0);
+
+ ieee80211_send_null_response(sta, tid, reason, false, more_data);
+}
+EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc);
+
+void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
+ u8 tid, bool buffered)
+{
+ struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
+
+ if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
+ return;
+
+ trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered);
+
+ if (buffered)
+ set_bit(tid, &sta->driver_buffered_tids);
+ else
+ clear_bit(tid, &sta->driver_buffered_tids);
+
+ sta_info_recalc_tim(sta);
+}
+EXPORT_SYMBOL(ieee80211_sta_set_buffered);
+
+static void
+ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data *sdata)
+{
+ struct ieee80211_local *local = sdata->local;
+ bool allow_p2p_go_ps = sdata->vif.p2p;
+ struct sta_info *sta;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(sta, &local->sta_list, list) {
+ if (sdata != sta->sdata ||
+ !test_sta_flag(sta, WLAN_STA_ASSOC))
+ continue;
+ if (!sta->sta.support_p2p_ps) {
+ allow_p2p_go_ps = false;
+ break;
+ }
+ }
+ rcu_read_unlock();
+
+ if (allow_p2p_go_ps != sdata->vif.bss_conf.allow_p2p_go_ps) {
+ sdata->vif.bss_conf.allow_p2p_go_ps = allow_p2p_go_ps;
+ ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_P2P_PS);
+ }
+}
+
+int sta_info_move_state(struct sta_info *sta,
+ enum ieee80211_sta_state new_state)
+{
+ might_sleep();
+
+ if (sta->sta_state == new_state)
+ return 0;
+
+ /* check allowed transitions first */
+
+ switch (new_state) {
+ case IEEE80211_STA_NONE:
+ if (sta->sta_state != IEEE80211_STA_AUTH)
+ return -EINVAL;
+ break;
+ case IEEE80211_STA_AUTH:
+ if (sta->sta_state != IEEE80211_STA_NONE &&
+ sta->sta_state != IEEE80211_STA_ASSOC)
+ return -EINVAL;
+ break;
+ case IEEE80211_STA_ASSOC:
+ if (sta->sta_state != IEEE80211_STA_AUTH &&
+ sta->sta_state != IEEE80211_STA_AUTHORIZED)
+ return -EINVAL;
+ break;
+ case IEEE80211_STA_AUTHORIZED:
+ if (sta->sta_state != IEEE80211_STA_ASSOC)
+ return -EINVAL;
+ break;
+ default:
+ WARN(1, "invalid state %d", new_state);
+ return -EINVAL;
+ }
+
+ sta_dbg(sta->sdata, "moving STA %pM to state %d\n",
+ sta->sta.addr, new_state);
+
+ /*
+ * notify the driver before the actual changes so it can
+ * fail the transition
+ */
+ if (test_sta_flag(sta, WLAN_STA_INSERTED)) {
+ int err = drv_sta_state(sta->local, sta->sdata, sta,
+ sta->sta_state, new_state);
+ if (err)
+ return err;
+ }
+
+ /* reflect the change in all state variables */
+
+ switch (new_state) {
+ case IEEE80211_STA_NONE:
+ if (sta->sta_state == IEEE80211_STA_AUTH)
+ clear_bit(WLAN_STA_AUTH, &sta->_flags);
+ break;
+ case IEEE80211_STA_AUTH:
+ if (sta->sta_state == IEEE80211_STA_NONE) {
+ set_bit(WLAN_STA_AUTH, &sta->_flags);
+ } else if (sta->sta_state == IEEE80211_STA_ASSOC) {
+ clear_bit(WLAN_STA_ASSOC, &sta->_flags);
+ ieee80211_recalc_min_chandef(sta->sdata);
+ if (!sta->sta.support_p2p_ps)
+ ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
+ }
+ break;
+ case IEEE80211_STA_ASSOC:
+ if (sta->sta_state == IEEE80211_STA_AUTH) {
+ set_bit(WLAN_STA_ASSOC, &sta->_flags);
+ ieee80211_recalc_min_chandef(sta->sdata);
+ if (!sta->sta.support_p2p_ps)
+ ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
+ } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
+ ieee80211_vif_dec_num_mcast(sta->sdata);
+ clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
+ ieee80211_clear_fast_xmit(sta);
+ ieee80211_clear_fast_rx(sta);
+ }
+ break;
+ case IEEE80211_STA_AUTHORIZED:
+ if (sta->sta_state == IEEE80211_STA_ASSOC) {
+ ieee80211_vif_inc_num_mcast(sta->sdata);
+ set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
+ ieee80211_check_fast_xmit(sta);
+ ieee80211_check_fast_rx(sta);
+ }
+ if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
+ sta->sdata->vif.type == NL80211_IFTYPE_AP)
+ cfg80211_send_layer2_update(sta->sdata->dev,
+ sta->sta.addr);
+ break;
+ default:
+ break;
+ }
+
+ sta->sta_state = new_state;
+
+ return 0;
+}
+
+u8 sta_info_tx_streams(struct sta_info *sta)
+{
+ struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap;
+ u8 rx_streams;
+
+ if (!sta->sta.ht_cap.ht_supported)
+ return 1;
+
+ if (sta->sta.vht_cap.vht_supported) {
+ int i;
+ u16 tx_mcs_map =
+ le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map);
+
+ for (i = 7; i >= 0; i--)
+ if ((tx_mcs_map & (0x3 << (i * 2))) !=
+ IEEE80211_VHT_MCS_NOT_SUPPORTED)
+ return i + 1;
+ }
+
+ if (ht_cap->mcs.rx_mask[3])
+ rx_streams = 4;
+ else if (ht_cap->mcs.rx_mask[2])
+ rx_streams = 3;
+ else if (ht_cap->mcs.rx_mask[1])
+ rx_streams = 2;
+ else
+ rx_streams = 1;
+
+ if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF))
+ return rx_streams;
+
+ return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
+ >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
+}
+
+static struct ieee80211_sta_rx_stats *
+sta_get_last_rx_stats(struct sta_info *sta)
+{
+ struct ieee80211_sta_rx_stats *stats = &sta->rx_stats;
+ struct ieee80211_local *local = sta->local;
+ int cpu;
+
+ if (!ieee80211_hw_check(&local->hw, USES_RSS))
+ return stats;
+
+ for_each_possible_cpu(cpu) {
+ struct ieee80211_sta_rx_stats *cpustats;
+
+ cpustats = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
+
+ if (time_after(cpustats->last_rx, stats->last_rx))
+ stats = cpustats;
+ }
+
+ return stats;
+}
+
+static void sta_stats_decode_rate(struct ieee80211_local *local, u16 rate,
+ struct rate_info *rinfo)
+{
+ rinfo->bw = STA_STATS_GET(BW, rate);
+
+ switch (STA_STATS_GET(TYPE, rate)) {
+ case STA_STATS_RATE_TYPE_VHT:
+ rinfo->flags = RATE_INFO_FLAGS_VHT_MCS;
+ rinfo->mcs = STA_STATS_GET(VHT_MCS, rate);
+ rinfo->nss = STA_STATS_GET(VHT_NSS, rate);
+ if (STA_STATS_GET(SGI, rate))
+ rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
+ break;
+ case STA_STATS_RATE_TYPE_HT:
+ rinfo->flags = RATE_INFO_FLAGS_MCS;
+ rinfo->mcs = STA_STATS_GET(HT_MCS, rate);
+ if (STA_STATS_GET(SGI, rate))
+ rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
+ break;
+ case STA_STATS_RATE_TYPE_LEGACY: {
+ struct ieee80211_supported_band *sband;
+ u16 brate;
+ unsigned int shift;
+ int band = STA_STATS_GET(LEGACY_BAND, rate);
+ int rate_idx = STA_STATS_GET(LEGACY_IDX, rate);
+
+ rinfo->flags = 0;
+ sband = local->hw.wiphy->bands[band];
+ brate = sband->bitrates[rate_idx].bitrate;
+ if (rinfo->bw == RATE_INFO_BW_5)
+ shift = 2;
+ else if (rinfo->bw == RATE_INFO_BW_10)
+ shift = 1;
+ else
+ shift = 0;
+ rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
+ break;
+ }
+ }
+}
+
+static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
+{
+ u16 rate = ACCESS_ONCE(sta_get_last_rx_stats(sta)->last_rate);
+
+ if (rate == STA_STATS_RATE_INVALID)
+ return -EINVAL;
+
+ sta_stats_decode_rate(sta->local, rate, rinfo);
+ return 0;
+}
+
+static void sta_set_tidstats(struct sta_info *sta,
+ struct cfg80211_tid_stats *tidstats,
+ int tid)
+{
+ struct ieee80211_local *local = sta->local;
+
+ if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) {
+ unsigned int start;
+
+ do {
+ start = u64_stats_fetch_begin(&sta->rx_stats.syncp);
+ tidstats->rx_msdu = sta->rx_stats.msdu[tid];
+ } while (u64_stats_fetch_retry(&sta->rx_stats.syncp, start));
+
+ tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU);
+ }
+
+ if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) {
+ tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU);
+ tidstats->tx_msdu = sta->tx_stats.msdu[tid];
+ }
+
+ if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) &&
+ ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
+ tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_RETRIES);
+ tidstats->tx_msdu_retries = sta->status_stats.msdu_retries[tid];
+ }
+
+ if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) &&
+ ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
+ tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_FAILED);
+ tidstats->tx_msdu_failed = sta->status_stats.msdu_failed[tid];
+ }
+}
+
+static inline u64 sta_get_stats_bytes(struct ieee80211_sta_rx_stats *rxstats)
+{
+ unsigned int start;
+ u64 value;
+
+ do {
+ start = u64_stats_fetch_begin(&rxstats->syncp);
+ value = rxstats->bytes;
+ } while (u64_stats_fetch_retry(&rxstats->syncp, start));
+
+ return value;
+}
+
+void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
+{
+ struct ieee80211_sub_if_data *sdata = sta->sdata;
+ struct ieee80211_local *local = sdata->local;
+ u32 thr = 0;
+ int i, ac, cpu;
+ struct ieee80211_sta_rx_stats *last_rxstats;
+
+ last_rxstats = sta_get_last_rx_stats(sta);
+
+ sinfo->generation = sdata->local->sta_generation;
+
+ /* do before driver, so beacon filtering drivers have a
+ * chance to e.g. just add the number of filtered beacons
+ * (or just modify the value entirely, of course)
+ */
+ if (sdata->vif.type == NL80211_IFTYPE_STATION)
+ sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal;
+
+ drv_sta_statistics(local, sdata, &sta->sta, sinfo);
+
+ sinfo->filled |= BIT(NL80211_STA_INFO_INACTIVE_TIME) |
+ BIT(NL80211_STA_INFO_STA_FLAGS) |
+ BIT(NL80211_STA_INFO_BSS_PARAM) |
+ BIT(NL80211_STA_INFO_CONNECTED_TIME) |
+ BIT(NL80211_STA_INFO_RX_DROP_MISC);
+
+ if (sdata->vif.type == NL80211_IFTYPE_STATION) {
+ sinfo->beacon_loss_count = sdata->u.mgd.beacon_loss_count;
+ sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_LOSS);
+ }
+
+ sinfo->connected_time = ktime_get_seconds() - sta->last_connected;
+ sinfo->inactive_time =
+ jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta));
+
+ if (!(sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES64) |
+ BIT(NL80211_STA_INFO_TX_BYTES)))) {
+ sinfo->tx_bytes = 0;
+ for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
+ sinfo->tx_bytes += sta->tx_stats.bytes[ac];
+ sinfo->filled |= BIT(NL80211_STA_INFO_TX_BYTES64);
+ }
+
+ if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_PACKETS))) {
+ sinfo->tx_packets = 0;
+ for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
+ sinfo->tx_packets += sta->tx_stats.packets[ac];
+ sinfo->filled |= BIT(NL80211_STA_INFO_TX_PACKETS);
+ }
+
+ if (!(sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES64) |
+ BIT(NL80211_STA_INFO_RX_BYTES)))) {
+ sinfo->rx_bytes += sta_get_stats_bytes(&sta->rx_stats);
+
+ if (sta->pcpu_rx_stats) {
+ for_each_possible_cpu(cpu) {
+ struct ieee80211_sta_rx_stats *cpurxs;
+
+ cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
+ sinfo->rx_bytes += sta_get_stats_bytes(cpurxs);
+ }
+ }
+
+ sinfo->filled |= BIT(NL80211_STA_INFO_RX_BYTES64);
+ }
+
+ if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_PACKETS))) {
+ sinfo->rx_packets = sta->rx_stats.packets;
+ if (sta->pcpu_rx_stats) {
+ for_each_possible_cpu(cpu) {
+ struct ieee80211_sta_rx_stats *cpurxs;
+
+ cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
+ sinfo->rx_packets += cpurxs->packets;
+ }
+ }
+ sinfo->filled |= BIT(NL80211_STA_INFO_RX_PACKETS);
+ }
+
+ if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_RETRIES))) {
+ sinfo->tx_retries = sta->status_stats.retry_count;
+ sinfo->filled |= BIT(NL80211_STA_INFO_TX_RETRIES);
+ }
+
+ if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_FAILED))) {
+ sinfo->tx_failed = sta->status_stats.retry_failed;
+ sinfo->filled |= BIT(NL80211_STA_INFO_TX_FAILED);
+ }
+
+ sinfo->rx_dropped_misc = sta->rx_stats.dropped;
+ if (sta->pcpu_rx_stats) {
+ for_each_possible_cpu(cpu) {
+ struct ieee80211_sta_rx_stats *cpurxs;
+
+ cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
+ sinfo->rx_dropped_misc += cpurxs->dropped;
+ }
+ }
+
+ if (sdata->vif.type == NL80211_IFTYPE_STATION &&
+ !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) {
+ sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX) |
+ BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
+ sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif);
+ }
+
+ if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) ||
+ ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) {
+ if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL))) {
+ sinfo->signal = (s8)last_rxstats->last_signal;
+ sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL);
+ }
+
+ if (!sta->pcpu_rx_stats &&
+ !(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL_AVG))) {
+ sinfo->signal_avg =
+ -ewma_signal_read(&sta->rx_stats_avg.signal);
+ sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG);
+ }
+ }
+
+ /* for the average - if pcpu_rx_stats isn't set - rxstats must point to
+ * the sta->rx_stats struct, so the check here is fine with and without
+ * pcpu statistics
+ */
+ if (last_rxstats->chains &&
+ !(sinfo->filled & (BIT(NL80211_STA_INFO_CHAIN_SIGNAL) |
+ BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) {
+ sinfo->filled |= BIT(NL80211_STA_INFO_CHAIN_SIGNAL);
+ if (!sta->pcpu_rx_stats)
+ sinfo->filled |= BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG);
+
+ sinfo->chains = last_rxstats->chains;
+
+ for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
+ sinfo->chain_signal[i] =
+ last_rxstats->chain_signal_last[i];
+ sinfo->chain_signal_avg[i] =
+ -ewma_signal_read(&sta->rx_stats_avg.chain_signal[i]);
+ }
+ }
+
+ if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE))) {
+ sta_set_rate_info_tx(sta, &sta->tx_stats.last_rate,
+ &sinfo->txrate);
+ sinfo->filled |= BIT(NL80211_STA_INFO_TX_BITRATE);
+ }
+
+ if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE))) {
+ if (sta_set_rate_info_rx(sta, &sinfo->rxrate) == 0)
+ sinfo->filled |= BIT(NL80211_STA_INFO_RX_BITRATE);
+ }
+
+ sinfo->filled |= BIT(NL80211_STA_INFO_TID_STATS);
+ for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
+ struct cfg80211_tid_stats *tidstats = &sinfo->pertid[i];
+
+ sta_set_tidstats(sta, tidstats, i);
+ }
+
+ if (ieee80211_vif_is_mesh(&sdata->vif)) {
+#ifdef CONFIG_MAC80211_MESH
+ sinfo->filled |= BIT(NL80211_STA_INFO_LLID) |
+ BIT(NL80211_STA_INFO_PLID) |
+ BIT(NL80211_STA_INFO_PLINK_STATE) |
+ BIT(NL80211_STA_INFO_LOCAL_PM) |
+ BIT(NL80211_STA_INFO_PEER_PM) |
+ BIT(NL80211_STA_INFO_NONPEER_PM);
+
+ sinfo->llid = sta->mesh->llid;
+ sinfo->plid = sta->mesh->plid;
+ sinfo->plink_state = sta->mesh->plink_state;
+ if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
+ sinfo->filled |= BIT(NL80211_STA_INFO_T_OFFSET);
+ sinfo->t_offset = sta->mesh->t_offset;
+ }
+ sinfo->local_pm = sta->mesh->local_pm;
+ sinfo->peer_pm = sta->mesh->peer_pm;
+ sinfo->nonpeer_pm = sta->mesh->nonpeer_pm;
+#endif
+ }
+
+ sinfo->bss_param.flags = 0;
+ if (sdata->vif.bss_conf.use_cts_prot)
+ sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
+ if (sdata->vif.bss_conf.use_short_preamble)
+ sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
+ if (sdata->vif.bss_conf.use_short_slot)
+ sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
+ sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period;
+ sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;
+
+ sinfo->sta_flags.set = 0;
+ sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
+ BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
+ BIT(NL80211_STA_FLAG_WME) |
+ BIT(NL80211_STA_FLAG_MFP) |
+ BIT(NL80211_STA_FLAG_AUTHENTICATED) |
+ BIT(NL80211_STA_FLAG_ASSOCIATED) |
+ BIT(NL80211_STA_FLAG_TDLS_PEER);
+ if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
+ sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
+ if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
+ sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
+ if (sta->sta.wme)
+ sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
+ if (test_sta_flag(sta, WLAN_STA_MFP))
+ sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
+ if (test_sta_flag(sta, WLAN_STA_AUTH))
+ sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
+ if (test_sta_flag(sta, WLAN_STA_ASSOC))
+ sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
+ if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
+ sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
+
+ thr = sta_get_expected_throughput(sta);
+
+ if (thr != 0) {
+ sinfo->filled |= BIT(NL80211_STA_INFO_EXPECTED_THROUGHPUT);
+ sinfo->expected_throughput = thr;
+ }
+}
+
+u32 sta_get_expected_throughput(struct sta_info *sta)
+{
+ struct ieee80211_sub_if_data *sdata = sta->sdata;
+ struct ieee80211_local *local = sdata->local;
+ struct rate_control_ref *ref = NULL;
+ u32 thr = 0;
+
+ if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
+ ref = local->rate_ctrl;
+
+ /* check if the driver has a SW RC implementation */
+ if (ref && ref->ops->get_expected_throughput)
+ thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv);
+ else
+ thr = drv_get_expected_throughput(local, sta);
+
+ return thr;
+}
+
+unsigned long ieee80211_sta_last_active(struct sta_info *sta)
+{
+ struct ieee80211_sta_rx_stats *stats = sta_get_last_rx_stats(sta);
+
+ if (!sta->status_stats.last_ack ||
+ time_after(stats->last_rx, sta->status_stats.last_ack))
+ return stats->last_rx;
+ return sta->status_stats.last_ack;
+}
+
+static void sta_update_codel_params(struct sta_info *sta, u32 thr)
+{
+ if (!sta->sdata->local->ops->wake_tx_queue)
+ return;
+
+ if (thr && thr < STA_SLOW_THRESHOLD * sta->local->num_sta) {
+ sta->cparams.target = MS2TIME(50);
+ sta->cparams.interval = MS2TIME(300);
+ sta->cparams.ecn = false;
+ } else {
+ sta->cparams.target = MS2TIME(20);
+ sta->cparams.interval = MS2TIME(100);
+ sta->cparams.ecn = true;
+ }
+}
+
+void ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta,
+ u32 thr)
+{
+ struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
+
+ sta_update_codel_params(sta, thr);
+}