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mac80211: Add TXQ scheduling API 

This adds an API to mac80211 to handle scheduling of TXQs and changes the
interface between driver and mac80211 for TXQ handling as follows:

- The wake_tx_queue callback interface no longer includes the TXQ. Instead,
  the driver is expected to retrieve that from ieee80211_next_txq()

- Two new mac80211 functions are added: ieee80211_next_txq() and
  ieee80211_schedule_txq(). The former returns the next TXQ that should be
  scheduled, and is how the driver gets a queue to pull packets from. The
  latter is called internally by mac80211 to start scheduling a queue, and
  the driver is supposed to call it to re-schedule the TXQ after it is
  finished pulling packets from it (unless the queue emptied).

The ath9k and ath10k drivers are changed to use the new API.

Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Toke Høiland-Jørgensen 2017-10-31 12:27:45 +01:00 коммит произвёл Johannes Berg
Родитель 9de18d8186
Коммит e937b8da5a
15 изменённых файлов: 174 добавлений и 263 удалений
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2
drivers/net/wireless/ath/ath10k/core.c
Просмотреть файл

@ -2574,9 +2574,7 @@ struct ath10k *ath10k_core_create(size_t priv_size, struct device *dev,
mutex_init(&ar->conf_mutex);
spin_lock_init(&ar->data_lock);
spin_lock_init(&ar->txqs_lock);
INIT_LIST_HEAD(&ar->txqs);
INIT_LIST_HEAD(&ar->peers);
init_waitqueue_head(&ar->peer_mapping_wq);
init_waitqueue_head(&ar->htt.empty_tx_wq);

4
drivers/net/wireless/ath/ath10k/core.h
Просмотреть файл

@ -347,7 +347,6 @@ struct ath10k_peer {
};
struct ath10k_txq {
struct list_head list;
unsigned long num_fw_queued;
unsigned long num_push_allowed;
};
@ -895,10 +894,7 @@ struct ath10k {
/* protects shared structure data */
spinlock_t data_lock;
/* protects: ar->txqs, artxq->list */
spinlock_t txqs_lock;
struct list_head txqs;
struct list_head arvifs;
struct list_head peers;
struct ath10k_peer *peer_map[ATH10K_MAX_NUM_PEER_IDS];

55
drivers/net/wireless/ath/ath10k/mac.c
Просмотреть файл

@ -3830,12 +3830,10 @@ static void ath10k_mac_txq_init(struct ieee80211_txq *txq)
return;
artxq = (void *)txq->drv_priv;
INIT_LIST_HEAD(&artxq->list);
}
static void ath10k_mac_txq_unref(struct ath10k *ar, struct ieee80211_txq *txq)
{
struct ath10k_txq *artxq;
struct ath10k_skb_cb *cb;
struct sk_buff *msdu;
int msdu_id;
@ -3843,12 +3841,6 @@ static void ath10k_mac_txq_unref(struct ath10k *ar, struct ieee80211_txq *txq)
if (!txq)
return;
artxq = (void *)txq->drv_priv;
spin_lock_bh(&ar->txqs_lock);
if (!list_empty(&artxq->list))
list_del_init(&artxq->list);
spin_unlock_bh(&ar->txqs_lock);
spin_lock_bh(&ar->htt.tx_lock);
idr_for_each_entry(&ar->htt.pending_tx, msdu, msdu_id) {
cb = ATH10K_SKB_CB(msdu);
@ -3978,23 +3970,17 @@ int ath10k_mac_tx_push_txq(struct ieee80211_hw *hw,
void ath10k_mac_tx_push_pending(struct ath10k *ar)
{
struct ieee80211_hw *hw = ar->hw;
struct ieee80211_txq *txq;
struct ath10k_txq *artxq;
struct ath10k_txq *last;
struct ieee80211_txq *txq, *first = NULL;
int ret;
int max;
if (ar->htt.num_pending_tx >= (ar->htt.max_num_pending_tx / 2))
return;
spin_lock_bh(&ar->txqs_lock);
rcu_read_lock();
last = list_last_entry(&ar->txqs, struct ath10k_txq, list);
while (!list_empty(&ar->txqs)) {
artxq = list_first_entry(&ar->txqs, struct ath10k_txq, list);
txq = container_of((void *)artxq, struct ieee80211_txq,
drv_priv);
txq = ieee80211_next_txq(hw);
while (txq) {
/* Prevent aggressive sta/tid taking over tx queue */
max = 16;
@ -4005,18 +3991,21 @@ void ath10k_mac_tx_push_pending(struct ath10k *ar)
break;
}
list_del_init(&artxq->list);
if (ret != -ENOENT)
list_add_tail(&artxq->list, &ar->txqs);
ieee80211_schedule_txq(hw, txq);
ath10k_htt_tx_txq_update(hw, txq);
if (artxq == last || (ret < 0 && ret != -ENOENT))
if (first == txq || (ret < 0 && ret != -ENOENT))
break;
if (!first)
first = txq;
txq = ieee80211_next_txq(hw);
}
rcu_read_unlock();
spin_unlock_bh(&ar->txqs_lock);
}
/************/
@ -4250,34 +4239,22 @@ static void ath10k_mac_op_tx(struct ieee80211_hw *hw,
}
}
static void ath10k_mac_op_wake_tx_queue(struct ieee80211_hw *hw,
struct ieee80211_txq *txq)
static void ath10k_mac_op_wake_tx_queue(struct ieee80211_hw *hw)
{
struct ath10k *ar = hw->priv;
struct ath10k_txq *artxq = (void *)txq->drv_priv;
struct ieee80211_txq *f_txq;
struct ath10k_txq *f_artxq;
struct ieee80211_txq *txq;
int ret = 0;
int max = 16;
spin_lock_bh(&ar->txqs_lock);
if (list_empty(&artxq->list))
list_add_tail(&artxq->list, &ar->txqs);
txq = ieee80211_next_txq(hw);
f_artxq = list_first_entry(&ar->txqs, struct ath10k_txq, list);
f_txq = container_of((void *)f_artxq, struct ieee80211_txq, drv_priv);
list_del_init(&f_artxq->list);
while (ath10k_mac_tx_can_push(hw, f_txq) && max--) {
ret = ath10k_mac_tx_push_txq(hw, f_txq);
while (ath10k_mac_tx_can_push(hw, txq) && max--) {
ret = ath10k_mac_tx_push_txq(hw, txq);
if (ret)
break;
}
if (ret != -ENOENT)
list_add_tail(&f_artxq->list, &ar->txqs);
spin_unlock_bh(&ar->txqs_lock);
ieee80211_schedule_txq(hw, txq);
ath10k_htt_tx_txq_update(hw, f_txq);
ath10k_htt_tx_txq_update(hw, txq);
}

9
drivers/net/wireless/ath/ath9k/ath9k.h
Просмотреть файл

@ -246,12 +246,8 @@ struct ath_atx_tid {
s8 bar_index;
bool active;
bool clear_ps_filter;
bool has_queued;
};
void __ath_tx_queue_tid(struct ath_softc *sc, struct ath_atx_tid *tid);
void ath_tx_queue_tid(struct ath_softc *sc, struct ath_atx_tid *tid);
struct ath_node {
struct ath_softc *sc;
struct ieee80211_sta *sta; /* station struct we're part of */
@ -591,8 +587,7 @@ bool ath_drain_all_txq(struct ath_softc *sc);
void ath_draintxq(struct ath_softc *sc, struct ath_txq *txq);
void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an);
void ath_tx_node_cleanup(struct ath_softc *sc, struct ath_node *an);
void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq);
void ath_txq_schedule_all(struct ath_softc *sc);
void ath_txq_schedule(struct ath_softc *sc);
int ath_tx_init(struct ath_softc *sc, int nbufs);
int ath_txq_update(struct ath_softc *sc, int qnum,
struct ath9k_tx_queue_info *q);
@ -618,7 +613,7 @@ void ath9k_release_buffered_frames(struct ieee80211_hw *hw,
u16 tids, int nframes,
enum ieee80211_frame_release_type reason,
bool more_data);
void ath9k_wake_tx_queue(struct ieee80211_hw *hw, struct ieee80211_txq *queue);
void ath9k_wake_tx_queue(struct ieee80211_hw *hw);
/********/
/* VIFs */

2
drivers/net/wireless/ath/ath9k/main.c
Просмотреть файл

@ -266,7 +266,7 @@ static bool ath_complete_reset(struct ath_softc *sc, bool start)
}
work:
ath_restart_work(sc);
ath_txq_schedule_all(sc);
ath_txq_schedule(sc);
}
sc->gtt_cnt = 0;

2
drivers/net/wireless/ath/ath9k/recv.c
Просмотреть файл

@ -1057,8 +1057,6 @@ static void ath_rx_count_airtime(struct ath_softc *sc,
if (!!(sc->airtime_flags & AIRTIME_USE_RX)) {
spin_lock_bh(&acq->lock);
an->airtime_deficit[acno] -= airtime;
if (an->airtime_deficit[acno] <= 0)
__ath_tx_queue_tid(sc, ATH_AN_2_TID(an, tidno));
spin_unlock_bh(&acq->lock);
}
ath_debug_airtime(sc, an, airtime, 0);

212
drivers/net/wireless/ath/ath9k/xmit.c
Просмотреть файл

@ -112,62 +112,11 @@ void ath_txq_unlock_complete(struct ath_softc *sc, struct ath_txq *txq)
ath_tx_status(hw, skb);
}
void __ath_tx_queue_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
{
struct ath_vif *avp = (struct ath_vif *) tid->an->vif->drv_priv;
struct ath_chanctx *ctx = avp->chanctx;
struct ath_acq *acq;
struct list_head *tid_list;
u8 acno = TID_TO_WME_AC(tid->tidno);
if (!ctx || !list_empty(&tid->list))
return;
acq = &ctx->acq[acno];
if ((sc->airtime_flags & AIRTIME_USE_NEW_QUEUES) &&
tid->an->airtime_deficit[acno] > 0)
tid_list = &acq->acq_new;
else
tid_list = &acq->acq_old;
list_add_tail(&tid->list, tid_list);
}
void ath_tx_queue_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
{
struct ath_vif *avp = (struct ath_vif *) tid->an->vif->drv_priv;
struct ath_chanctx *ctx = avp->chanctx;
struct ath_acq *acq;
if (!ctx || !list_empty(&tid->list))
return;
acq = &ctx->acq[TID_TO_WME_AC(tid->tidno)];
spin_lock_bh(&acq->lock);
__ath_tx_queue_tid(sc, tid);
spin_unlock_bh(&acq->lock);
}
void ath9k_wake_tx_queue(struct ieee80211_hw *hw, struct ieee80211_txq *queue)
void ath9k_wake_tx_queue(struct ieee80211_hw *hw)
{
struct ath_softc *sc = hw->priv;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_atx_tid *tid = (struct ath_atx_tid *) queue->drv_priv;
struct ath_txq *txq = tid->txq;
ath_dbg(common, QUEUE, "Waking TX queue: %pM (%d)\n",
queue->sta ? queue->sta->addr : queue->vif->addr,
tid->tidno);
ath_txq_lock(sc, txq);
tid->has_queued = true;
ath_tx_queue_tid(sc, tid);
ath_txq_schedule(sc, txq);
ath_txq_unlock(sc, txq);
ath_txq_schedule(sc);
}
static struct ath_frame_info *get_frame_info(struct sk_buff *skb)
@ -230,14 +179,9 @@ ath_tid_pull(struct ath_atx_tid *tid)
struct ath_frame_info *fi;
int q;
if (!tid->has_queued)
return NULL;
skb = ieee80211_tx_dequeue(hw, txq);
if (!skb) {
tid->has_queued = false;
if (!skb)
return NULL;
}
if (ath_tx_prepare(hw, skb, &txctl)) {
ieee80211_free_txskb(hw, skb);
@ -254,12 +198,6 @@ ath_tid_pull(struct ath_atx_tid *tid)
return skb;
}
static bool ath_tid_has_buffered(struct ath_atx_tid *tid)
{
return !skb_queue_empty(&tid->retry_q) || tid->has_queued;
}
static struct sk_buff *ath_tid_dequeue(struct ath_atx_tid *tid)
{
struct sk_buff *skb;
@ -671,7 +609,10 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
skb_queue_splice_tail(&bf_pending, &tid->retry_q);
if (!an->sleeping) {
ath_tx_queue_tid(sc, tid);
struct ieee80211_txq *queue = container_of(
(void *)tid, struct ieee80211_txq, drv_priv);
ieee80211_schedule_txq(sc->hw, queue);
if (ts->ts_status & (ATH9K_TXERR_FILT | ATH9K_TXERR_XRETRY))
tid->clear_ps_filter = true;
@ -719,8 +660,6 @@ static void ath_tx_count_airtime(struct ath_softc *sc, struct ath_node *an,
spin_lock_bh(&acq->lock);
an->airtime_deficit[q] -= airtime;
if (an->airtime_deficit[q] <= 0)
__ath_tx_queue_tid(sc, tid);
spin_unlock_bh(&acq->lock);
}
ath_debug_airtime(sc, an, 0, airtime);
@ -770,8 +709,6 @@ static void ath_tx_process_buffer(struct ath_softc *sc, struct ath_txq *txq,
} else
ath_tx_complete_aggr(sc, txq, bf, bf_head, sta, tid, ts, txok);
if (!flush)
ath_txq_schedule(sc, txq);
}
static bool ath_lookup_legacy(struct ath_buf *bf)
@ -1506,8 +1443,8 @@ ath_tx_form_burst(struct ath_softc *sc, struct ath_txq *txq,
} while (1);
}
static bool ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq,
struct ath_atx_tid *tid)
static int ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq,
struct ath_atx_tid *tid)
{
struct ath_buf *bf;
struct ieee80211_tx_info *tx_info;
@ -1515,21 +1452,18 @@ static bool ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq,
int aggr_len = 0;
bool aggr;
if (!ath_tid_has_buffered(tid))
return false;
INIT_LIST_HEAD(&bf_q);
bf = ath_tx_get_tid_subframe(sc, txq, tid);
if (!bf)
return false;
return -ENOENT;
tx_info = IEEE80211_SKB_CB(bf->bf_mpdu);
aggr = !!(tx_info->flags & IEEE80211_TX_CTL_AMPDU);
if ((aggr && txq->axq_ampdu_depth >= ATH_AGGR_MIN_QDEPTH) ||
(!aggr && txq->axq_depth >= ATH_NON_AGGR_MIN_QDEPTH)) {
__skb_queue_tail(&tid->retry_q, bf->bf_mpdu);
return false;
return -ENOBUFS;
}
ath_set_rates(tid->an->vif, tid->an->sta, bf);
@ -1539,7 +1473,7 @@ static bool ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq,
ath_tx_form_burst(sc, txq, tid, &bf_q, bf);
if (list_empty(&bf_q))
return false;
return -ENOENT;
if (tid->clear_ps_filter || tid->an->no_ps_filter) {
tid->clear_ps_filter = false;
@ -1548,7 +1482,7 @@ static bool ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq,
ath_tx_fill_desc(sc, bf, txq, aggr_len);
ath_tx_txqaddbuf(sc, txq, &bf_q, false);
return true;
return 0;
}
int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta,
@ -1611,52 +1545,49 @@ void ath_tx_aggr_sleep(struct ieee80211_sta *sta, struct ath_softc *sc,
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_atx_tid *tid;
struct ath_txq *txq;
struct ieee80211_txq *queue;
int tidno;
ath_dbg(common, XMIT, "%s called\n", __func__);
for (tidno = 0; tidno < IEEE80211_NUM_TIDS; tidno++) {
tid = ath_node_to_tid(an, tidno);
txq = tid->txq;
ath_txq_lock(sc, txq);
if (list_empty(&tid->list)) {
ath_txq_unlock(sc, txq);
continue;
}
queue = container_of((void *)tid,
struct ieee80211_txq, drv_priv);
if (!skb_queue_empty(&tid->retry_q))
ieee80211_sta_set_buffered(sta, tid->tidno, true);
list_del_init(&tid->list);
ath_txq_unlock(sc, txq);
}
}
void ath_tx_aggr_wakeup(struct ath_softc *sc, struct ath_node *an)
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ieee80211_txq *queue;
struct ath_atx_tid *tid;
struct ath_txq *txq;
int tidno;
bool sched, wake = false;
ath_dbg(common, XMIT, "%s called\n", __func__);
for (tidno = 0; tidno < IEEE80211_NUM_TIDS; tidno++) {
tid = ath_node_to_tid(an, tidno);
txq = tid->txq;
queue = container_of((void *)tid,
struct ieee80211_txq, drv_priv);
ath_txq_lock(sc, txq);
tid->clear_ps_filter = true;
if (ath_tid_has_buffered(tid)) {
ath_tx_queue_tid(sc, tid);
ath_txq_schedule(sc, txq);
}
ath_txq_unlock_complete(sc, txq);
sched = !skb_queue_empty(&tid->retry_q);
ath_txq_unlock(sc, txq);
if (sched && ieee80211_schedule_txq(sc->hw, queue))
wake = true;
}
if (wake)
ath_txq_schedule(sc);
}
void ath9k_release_buffered_frames(struct ieee80211_hw *hw,
@ -1948,86 +1879,44 @@ void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq)
/* For each acq entry, for each tid, try to schedule packets
* for transmit until ampdu_depth has reached min Q depth.
*/
void ath_txq_schedule(struct ath_softc *sc, struct ath_txq *txq)
void ath_txq_schedule(struct ath_softc *sc)
{
struct ieee80211_hw *hw = sc->hw;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ieee80211_txq *queue;
struct ath_atx_tid *tid;
struct list_head *tid_list;
struct ath_acq *acq;
bool active = AIRTIME_ACTIVE(sc->airtime_flags);
if (txq->mac80211_qnum < 0)
return;
struct ath_txq *txq;
int ret = 0;
if (test_bit(ATH_OP_HW_RESET, &common->op_flags))
return;
spin_lock_bh(&sc->chan_lock);
rcu_read_lock();
acq = &sc->cur_chan->acq[txq->mac80211_qnum];
queue = ieee80211_next_txq(hw);
if (!queue)
return;
if (sc->cur_chan->stopped)
tid = (struct ath_atx_tid *)queue->drv_priv;
txq = tid->txq;
ath_txq_lock(sc, txq);
if (txq->mac80211_qnum < 0)
goto out;
begin:
tid_list = &acq->acq_new;
if (list_empty(tid_list)) {
tid_list = &acq->acq_old;
if (list_empty(tid_list))
goto out;
}
tid = list_first_entry(tid_list, struct ath_atx_tid, list);
spin_lock_bh(&sc->chan_lock);
rcu_read_lock();
if (active && tid->an->airtime_deficit[txq->mac80211_qnum] <= 0) {
spin_lock_bh(&acq->lock);
tid->an->airtime_deficit[txq->mac80211_qnum] += ATH_AIRTIME_QUANTUM;
list_move_tail(&tid->list, &acq->acq_old);
spin_unlock_bh(&acq->lock);
goto begin;
}
if (!sc->cur_chan->stopped)
ret = ath_tx_sched_aggr(sc, txq, tid);
if (!ath_tid_has_buffered(tid)) {
spin_lock_bh(&acq->lock);
if ((tid_list == &acq->acq_new) && !list_empty(&acq->acq_old))
list_move_tail(&tid->list, &acq->acq_old);
else {
list_del_init(&tid->list);
}
spin_unlock_bh(&acq->lock);
goto begin;
}
/*
* If we succeed in scheduling something, immediately restart to make
* sure we keep the HW busy.
*/
if(ath_tx_sched_aggr(sc, txq, tid)) {
if (!active) {
spin_lock_bh(&acq->lock);
list_move_tail(&tid->list, &acq->acq_old);
spin_unlock_bh(&acq->lock);
}
goto begin;
}
out:
rcu_read_unlock();
spin_unlock_bh(&sc->chan_lock);
}
void ath_txq_schedule_all(struct ath_softc *sc)
{
struct ath_txq *txq;
int i;
out:
for (i = 0; i < IEEE80211_NUM_ACS; i++) {
txq = sc->tx.txq_map[i];
if (ret != -ENOENT)
ieee80211_schedule_txq(hw, queue);
spin_lock_bh(&txq->axq_lock);
ath_txq_schedule(sc, txq);
spin_unlock_bh(&txq->axq_lock);
}
ath_txq_unlock(sc, txq);
}
/***********/
@ -2645,7 +2534,6 @@ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
if (list_empty(&txq->axq_q)) {
txq->axq_link = NULL;
ath_txq_schedule(sc, txq);
break;
}
bf = list_first_entry(&txq->axq_q, struct ath_buf, list);
@ -2697,6 +2585,7 @@ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
ath_tx_process_buffer(sc, txq, &ts, bf, &bf_head);
}
ath_txq_unlock_complete(sc, txq);
ath_txq_schedule(sc);
}
void ath_tx_tasklet(struct ath_softc *sc)
@ -2711,6 +2600,7 @@ void ath_tx_tasklet(struct ath_softc *sc)
ath_tx_processq(sc, &sc->tx.txq[i]);
}
rcu_read_unlock();
ath_txq_schedule(sc);
}
void ath_tx_edma_tasklet(struct ath_softc *sc)
@ -2796,6 +2686,7 @@ void ath_tx_edma_tasklet(struct ath_softc *sc)
ath_txq_unlock_complete(sc, txq);
}
rcu_read_unlock();
ath_txq_schedule(sc);
}
/*****************/
@ -2875,7 +2766,6 @@ void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an)
tid->baw_head = tid->baw_tail = 0;
tid->active = false;
tid->clear_ps_filter = true;
tid->has_queued = false;
__skb_queue_head_init(&tid->retry_q);
INIT_LIST_HEAD(&tid->list);
acno = TID_TO_WME_AC(tidno);

37
include/net/mac80211.h
Просмотреть файл

@ -105,9 +105,12 @@
* The driver is expected to initialize its private per-queue data for stations
* and interfaces in the .add_interface and .sta_add ops.
*
* The driver can't access the queue directly. To dequeue a frame, it calls
* ieee80211_tx_dequeue(). Whenever mac80211 adds a new frame to a queue, it
* calls the .wake_tx_queue driver op.
* The driver can't access the queue directly. To obtain the next queue to pull
* frames from, the driver calls ieee80211_next_txq(). To dequeue a frame from a
* txq, it calls ieee80211_tx_dequeue(). Whenever mac80211 adds a new frame to a
* queue, it calls the .wake_tx_queue driver op. The driver is expected to
* re-schedule the txq using ieee80211_schedule_txq() if it is still active
* after the driver has finished pulling packets from it.
*
* For AP powersave TIM handling, the driver only needs to indicate if it has
* buffered packets in the driver specific data structures by calling
@ -3731,8 +3734,7 @@ struct ieee80211_ops {
struct ieee80211_vif *vif,
struct ieee80211_tdls_ch_sw_params *params);
void (*wake_tx_queue)(struct ieee80211_hw *hw,
struct ieee80211_txq *txq);
void (*wake_tx_queue)(struct ieee80211_hw *hw);
void (*sync_rx_queues)(struct ieee80211_hw *hw);
int (*start_nan)(struct ieee80211_hw *hw,
@ -5883,13 +5885,36 @@ void ieee80211_unreserve_tid(struct ieee80211_sta *sta, u8 tid);
* ieee80211_tx_dequeue - dequeue a packet from a software tx queue
*
* @hw: pointer as obtained from ieee80211_alloc_hw()
* @txq: pointer obtained from station or virtual interface
* @txq: pointer obtained from ieee80211_next_txq()
*
* Returns the skb if successful, %NULL if no frame was available.
*/
struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
struct ieee80211_txq *txq);
/**
* ieee80211_schedule_txq - add txq to scheduling loop
*
* @hw: pointer as obtained from ieee80211_alloc_hw()
* @txq: pointer obtained from station or virtual interface
*
* Returns %true if the txq was actually added to the scheduling,
* %false otherwise.
*/
bool ieee80211_schedule_txq(struct ieee80211_hw *hw,
struct ieee80211_txq *txq);
/**
* ieee80211_next_txq - get next tx queue to pull packets from
*
* @hw: pointer as obtained from ieee80211_alloc_hw()
*
* Returns the next txq if successful, %NULL if no queue is eligible. If a txq
* is returned, it will have been removed from the scheduler queue and needs to
* be re-scheduled with ieee80211_schedule_txq() to continue to be active.
*/
struct ieee80211_txq *ieee80211_next_txq(struct ieee80211_hw *hw);
/**
* ieee80211_txq_get_depth - get pending frame/byte count of given txq
*

6
net/mac80211/agg-tx.c
Просмотреть файл

@ -226,9 +226,13 @@ ieee80211_agg_start_txq(struct sta_info *sta, int tid, bool enable)
clear_bit(IEEE80211_TXQ_AMPDU, &txqi->flags);
clear_bit(IEEE80211_TXQ_STOP, &txqi->flags);
if (!ieee80211_schedule_txq(&sta->sdata->local->hw, txq))
return;
local_bh_disable();
rcu_read_lock();
drv_wake_tx_queue(sta->sdata->local, txqi);
drv_wake_tx_queue(sta->sdata->local);
rcu_read_unlock();
local_bh_enable();
}

12
net/mac80211/driver-ops.h
Просмотреть файл

@ -1158,16 +1158,10 @@ drv_tdls_recv_channel_switch(struct ieee80211_local *local,
trace_drv_return_void(local);
}
static inline void drv_wake_tx_queue(struct ieee80211_local *local,
struct txq_info *txq)
static inline void drv_wake_tx_queue(struct ieee80211_local *local)
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(txq->txq.vif);
if (!check_sdata_in_driver(sdata))
return;
trace_drv_wake_tx_queue(local, sdata, txq);
local->ops->wake_tx_queue(&local->hw, &txq->txq);
trace_drv_wake_tx_queue(local);
local->ops->wake_tx_queue(&local->hw);
}
static inline int drv_start_nan(struct ieee80211_local *local,

5
net/mac80211/ieee80211_i.h
Просмотреть файл

@ -832,6 +832,7 @@ struct txq_info {
struct codel_vars def_cvars;
struct codel_stats cstats;
struct sk_buff_head frags;
struct list_head schedule_order;
unsigned long flags;
/* keep last! */
@ -1122,6 +1123,10 @@ struct ieee80211_local {
struct codel_vars *cvars;
struct codel_params cparams;
/* protects active_txqs and txqi->schedule_order */
spinlock_t active_txq_lock;
struct list_head active_txqs;
const struct ieee80211_ops *ops;
/*

3
net/mac80211/main.c
Просмотреть файл

@ -619,6 +619,9 @@ struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
spin_lock_init(&local->rx_path_lock);
spin_lock_init(&local->queue_stop_reason_lock);
INIT_LIST_HEAD(&local->active_txqs);
spin_lock_init(&local->active_txq_lock);
INIT_LIST_HEAD(&local->chanctx_list);
mutex_init(&local->chanctx_mtx);

7
net/mac80211/sta_info.c
Просмотреть файл

@ -1237,12 +1237,17 @@ void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
if (sta->sta.txq[0]) {
bool wake = false;
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]));
if (ieee80211_schedule_txq(&local->hw, sta->sta.txq[i]))
wake = true;
}
if (wake)
drv_wake_tx_queue(local);
}
skb_queue_head_init(&pending);

32
net/mac80211/trace.h
Просмотреть файл

@ -2550,35 +2550,9 @@ TRACE_EVENT(drv_tdls_recv_channel_switch,
)
);
TRACE_EVENT(drv_wake_tx_queue,
TP_PROTO(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata,
struct txq_info *txq),
TP_ARGS(local, sdata, txq),
TP_STRUCT__entry(
LOCAL_ENTRY
VIF_ENTRY
STA_ENTRY
__field(u8, ac)
__field(u8, tid)
),
TP_fast_assign(
struct ieee80211_sta *sta = txq->txq.sta;
LOCAL_ASSIGN;
VIF_ASSIGN;
STA_ASSIGN;
__entry->ac = txq->txq.ac;
__entry->tid = txq->txq.tid;
),
TP_printk(
LOCAL_PR_FMT VIF_PR_FMT STA_PR_FMT " ac:%d tid:%d",
LOCAL_PR_ARG, VIF_PR_ARG, STA_PR_ARG, __entry->ac, __entry->tid
)
DEFINE_EVENT(local_only_evt, drv_wake_tx_queue,
TP_PROTO(struct ieee80211_local *local),
TP_ARGS(local)
);
#endif /* !__MAC80211_DRIVER_TRACE || TRACE_HEADER_MULTI_READ */

49
net/mac80211/tx.c
Просмотреть файл

@ -1439,6 +1439,7 @@ void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
codel_vars_init(&txqi->def_cvars);
codel_stats_init(&txqi->cstats);
__skb_queue_head_init(&txqi->frags);
INIT_LIST_HEAD(&txqi->schedule_order);
txqi->txq.vif = &sdata->vif;
@ -1462,6 +1463,7 @@ void ieee80211_txq_purge(struct ieee80211_local *local,
fq_tin_reset(fq, tin, fq_skb_free_func);
ieee80211_purge_tx_queue(&local->hw, &txqi->frags);
list_del_init(&txqi->schedule_order);
}
int ieee80211_txq_setup_flows(struct ieee80211_local *local)
@ -1558,7 +1560,8 @@ static bool ieee80211_queue_skb(struct ieee80211_local *local,
ieee80211_txq_enqueue(local, txqi, skb);
spin_unlock_bh(&fq->lock);
drv_wake_tx_queue(local, txqi);
if (ieee80211_schedule_txq(&local->hw, &txqi->txq))
drv_wake_tx_queue(local);
return true;
}
@ -3553,6 +3556,50 @@ out:
}
EXPORT_SYMBOL(ieee80211_tx_dequeue);
bool ieee80211_schedule_txq(struct ieee80211_hw *hw,
struct ieee80211_txq *txq)
{
struct ieee80211_local *local = hw_to_local(hw);
struct txq_info *txqi = to_txq_info(txq);
bool ret = false;
spin_lock_bh(&local->active_txq_lock);
if (list_empty(&txqi->schedule_order)) {
list_add_tail(&txqi->schedule_order, &local->active_txqs);
ret = true;
}
spin_unlock_bh(&local->active_txq_lock);
return ret;
}
EXPORT_SYMBOL(ieee80211_schedule_txq);
struct ieee80211_txq *ieee80211_next_txq(struct ieee80211_hw *hw)
{
struct ieee80211_local *local = hw_to_local(hw);
struct txq_info *txqi = NULL;
spin_lock_bh(&local->active_txq_lock);
if (list_empty(&local->active_txqs))
goto out;
txqi = list_first_entry(&local->active_txqs,
struct txq_info, schedule_order);
list_del_init(&txqi->schedule_order);
out:
spin_unlock_bh(&local->active_txq_lock);
if (!txqi)
return NULL;
return &txqi->txq;
}
EXPORT_SYMBOL(ieee80211_next_txq);
void __ieee80211_subif_start_xmit(struct sk_buff *skb,
struct net_device *dev,
u32 info_flags)