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5a1b57c0dd
A few drivers do the full transmit operation asynchronously, which means that a bus error that happens when forwarding the packet to the transmitter or a timeout happening when offloading the request to the transmitter will not be reported immediately. The solution in this case is to call this new helper to free the necessary resources, restart the queue and always return the same generic TRAC error code: IEEE802154_SYSTEM_ERROR. Suggested-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Acked-by: Alexander Aring <aahringo@redhat.com> Link: https://lore.kernel.org/r/20220407100903.1695973-6-miquel.raynal@bootlin.com Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
116 lines
2.8 KiB
C
116 lines
2.8 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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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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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_wake_queue(hw);
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}
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dev_consume_skb_any(skb);
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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_wake_queue(hw);
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dev_kfree_skb_any(skb);
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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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