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![Stefan Schmidt](/assets/img/avatar_default.png)
The function parameter name was wrong in kdocs. net/mac802154/util.c:27: warning: Function parameter or member 'hw' not described in 'ieee802154_wake_queue' net/mac802154/util.c:27: warning: Excess function parameter 'local' description in 'ieee802154_wake_queue' net/mac802154/util.c:53: warning: Function parameter or member 'hw' not described in 'ieee802154_stop_queue' net/mac802154/util.c:53: warning: Excess function parameter 'local' description in 'ieee802154_stop_queue' Fixing name and description. Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
173 lines
4.6 KiB
C
173 lines
4.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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*
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* Authors:
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* Alexander Aring <aar@pengutronix.de>
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*
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* Based on: net/mac80211/util.c
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*/
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#include "ieee802154_i.h"
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#include "driver-ops.h"
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/* privid for wpan_phys to determine whether they belong to us or not */
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const void *const mac802154_wpan_phy_privid = &mac802154_wpan_phy_privid;
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/**
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* ieee802154_wake_queue - wake ieee802154 queue
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* @hw: main hardware object
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*
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* Tranceivers usually have either one transmit framebuffer or one framebuffer
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* for both transmitting and receiving. Hence, the core currently only handles
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* one frame at a time for each phy, which means we had to stop the queue to
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* avoid new skb to come during the transmission. The queue then needs to be
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* woken up after the operation.
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*/
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static void ieee802154_wake_queue(struct ieee802154_hw *hw)
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{
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struct ieee802154_local *local = hw_to_local(hw);
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struct ieee802154_sub_if_data *sdata;
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rcu_read_lock();
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clear_bit(WPAN_PHY_FLAG_STATE_QUEUE_STOPPED, &local->phy->flags);
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list_for_each_entry_rcu(sdata, &local->interfaces, list) {
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if (!sdata->dev)
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continue;
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netif_wake_queue(sdata->dev);
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}
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rcu_read_unlock();
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}
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/**
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* ieee802154_stop_queue - stop ieee802154 queue
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* @hw: main hardware object
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*
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* Tranceivers usually have either one transmit framebuffer or one framebuffer
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* for both transmitting and receiving. Hence, the core currently only handles
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* one frame at a time for each phy, which means we need to tell upper layers to
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* stop giving us new skbs while we are busy with the transmitted one. The queue
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* must then be stopped before transmitting.
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*/
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static void ieee802154_stop_queue(struct ieee802154_hw *hw)
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{
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struct ieee802154_local *local = hw_to_local(hw);
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struct ieee802154_sub_if_data *sdata;
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rcu_read_lock();
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list_for_each_entry_rcu(sdata, &local->interfaces, list) {
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if (!sdata->dev)
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continue;
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netif_stop_queue(sdata->dev);
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}
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rcu_read_unlock();
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}
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void ieee802154_hold_queue(struct ieee802154_local *local)
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{
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unsigned long flags;
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spin_lock_irqsave(&local->phy->queue_lock, flags);
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if (!atomic_fetch_inc(&local->phy->hold_txs))
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ieee802154_stop_queue(&local->hw);
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spin_unlock_irqrestore(&local->phy->queue_lock, flags);
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}
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void ieee802154_release_queue(struct ieee802154_local *local)
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{
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unsigned long flags;
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spin_lock_irqsave(&local->phy->queue_lock, flags);
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if (atomic_dec_and_test(&local->phy->hold_txs))
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ieee802154_wake_queue(&local->hw);
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spin_unlock_irqrestore(&local->phy->queue_lock, flags);
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}
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void ieee802154_disable_queue(struct ieee802154_local *local)
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{
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struct ieee802154_sub_if_data *sdata;
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rcu_read_lock();
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list_for_each_entry_rcu(sdata, &local->interfaces, list) {
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if (!sdata->dev)
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continue;
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netif_tx_disable(sdata->dev);
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}
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rcu_read_unlock();
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}
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enum hrtimer_restart ieee802154_xmit_ifs_timer(struct hrtimer *timer)
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{
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struct ieee802154_local *local =
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container_of(timer, struct ieee802154_local, ifs_timer);
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ieee802154_release_queue(local);
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return HRTIMER_NORESTART;
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}
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void ieee802154_xmit_complete(struct ieee802154_hw *hw, struct sk_buff *skb,
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bool ifs_handling)
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{
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struct ieee802154_local *local = hw_to_local(hw);
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local->tx_result = IEEE802154_SUCCESS;
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if (ifs_handling) {
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u8 max_sifs_size;
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/* If transceiver sets CRC on his own we need to use lifs
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* threshold len above 16 otherwise 18, because it's not
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* part of skb->len.
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*/
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if (hw->flags & IEEE802154_HW_TX_OMIT_CKSUM)
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max_sifs_size = IEEE802154_MAX_SIFS_FRAME_SIZE -
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IEEE802154_FCS_LEN;
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else
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max_sifs_size = IEEE802154_MAX_SIFS_FRAME_SIZE;
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if (skb->len > max_sifs_size)
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hrtimer_start(&local->ifs_timer,
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hw->phy->lifs_period * NSEC_PER_USEC,
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HRTIMER_MODE_REL);
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else
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hrtimer_start(&local->ifs_timer,
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hw->phy->sifs_period * NSEC_PER_USEC,
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HRTIMER_MODE_REL);
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} else {
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ieee802154_release_queue(local);
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}
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dev_consume_skb_any(skb);
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if (atomic_dec_and_test(&hw->phy->ongoing_txs))
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wake_up(&hw->phy->sync_txq);
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}
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EXPORT_SYMBOL(ieee802154_xmit_complete);
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void ieee802154_xmit_error(struct ieee802154_hw *hw, struct sk_buff *skb,
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int reason)
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{
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struct ieee802154_local *local = hw_to_local(hw);
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local->tx_result = reason;
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ieee802154_release_queue(local);
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dev_kfree_skb_any(skb);
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if (atomic_dec_and_test(&hw->phy->ongoing_txs))
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wake_up(&hw->phy->sync_txq);
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}
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EXPORT_SYMBOL(ieee802154_xmit_error);
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void ieee802154_xmit_hw_error(struct ieee802154_hw *hw, struct sk_buff *skb)
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{
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ieee802154_xmit_error(hw, skb, IEEE802154_SYSTEM_ERROR);
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}
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EXPORT_SYMBOL(ieee802154_xmit_hw_error);
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void ieee802154_stop_device(struct ieee802154_local *local)
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{
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flush_workqueue(local->workqueue);
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hrtimer_cancel(&local->ifs_timer);
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drv_stop(local);
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}
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