3f3c4bb5ec
This patch fix the max sifs size correction when the IEEE802154_HW_TX_OMIT_CKSUM flag is set. With this flag the sk_buff doesn't contain the CRC, because the transceiver will add the CRC while transmit. Also add some defines for the max sifs frame size value and frame check sequence according to 802.15.4 standard. Signed-off-by: Alexander Aring <alex.aring@gmail.com> Acked-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
/* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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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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/* 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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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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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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EXPORT_SYMBOL(ieee802154_wake_queue);
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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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EXPORT_SYMBOL(ieee802154_stop_queue);
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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_wake_queue(&local->hw);
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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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if (ifs_handling) {
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struct ieee802154_local *local = hw_to_local(hw);
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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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ktime_set(0, 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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ktime_set(0, hw->phy->sifs_period * NSEC_PER_USEC),
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HRTIMER_MODE_REL);
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consume_skb(skb);
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} else {
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ieee802154_wake_queue(hw);
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consume_skb(skb);
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}
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}
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EXPORT_SYMBOL(ieee802154_xmit_complete);
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