cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

util.c (2833B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 *
      4 * Authors:
      5 * Alexander Aring <aar@pengutronix.de>
      6 *
      7 * Based on: net/mac80211/util.c
      8 */
      9
     10#include "ieee802154_i.h"
     11#include "driver-ops.h"
     12
     13/* privid for wpan_phys to determine whether they belong to us or not */
     14const void *const mac802154_wpan_phy_privid = &mac802154_wpan_phy_privid;
     15
     16void ieee802154_wake_queue(struct ieee802154_hw *hw)
     17{
     18	struct ieee802154_local *local = hw_to_local(hw);
     19	struct ieee802154_sub_if_data *sdata;
     20
     21	rcu_read_lock();
     22	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
     23		if (!sdata->dev)
     24			continue;
     25
     26		netif_wake_queue(sdata->dev);
     27	}
     28	rcu_read_unlock();
     29}
     30EXPORT_SYMBOL(ieee802154_wake_queue);
     31
     32void ieee802154_stop_queue(struct ieee802154_hw *hw)
     33{
     34	struct ieee802154_local *local = hw_to_local(hw);
     35	struct ieee802154_sub_if_data *sdata;
     36
     37	rcu_read_lock();
     38	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
     39		if (!sdata->dev)
     40			continue;
     41
     42		netif_stop_queue(sdata->dev);
     43	}
     44	rcu_read_unlock();
     45}
     46EXPORT_SYMBOL(ieee802154_stop_queue);
     47
     48enum hrtimer_restart ieee802154_xmit_ifs_timer(struct hrtimer *timer)
     49{
     50	struct ieee802154_local *local =
     51		container_of(timer, struct ieee802154_local, ifs_timer);
     52
     53	ieee802154_wake_queue(&local->hw);
     54
     55	return HRTIMER_NORESTART;
     56}
     57
     58void ieee802154_xmit_complete(struct ieee802154_hw *hw, struct sk_buff *skb,
     59			      bool ifs_handling)
     60{
     61	struct ieee802154_local *local = hw_to_local(hw);
     62
     63	local->tx_result = IEEE802154_SUCCESS;
     64
     65	if (ifs_handling) {
     66		u8 max_sifs_size;
     67
     68		/* If transceiver sets CRC on his own we need to use lifs
     69		 * threshold len above 16 otherwise 18, because it's not
     70		 * part of skb->len.
     71		 */
     72		if (hw->flags & IEEE802154_HW_TX_OMIT_CKSUM)
     73			max_sifs_size = IEEE802154_MAX_SIFS_FRAME_SIZE -
     74					IEEE802154_FCS_LEN;
     75		else
     76			max_sifs_size = IEEE802154_MAX_SIFS_FRAME_SIZE;
     77
     78		if (skb->len > max_sifs_size)
     79			hrtimer_start(&local->ifs_timer,
     80				      hw->phy->lifs_period * NSEC_PER_USEC,
     81				      HRTIMER_MODE_REL);
     82		else
     83			hrtimer_start(&local->ifs_timer,
     84				      hw->phy->sifs_period * NSEC_PER_USEC,
     85				      HRTIMER_MODE_REL);
     86	} else {
     87		ieee802154_wake_queue(hw);
     88	}
     89
     90	dev_consume_skb_any(skb);
     91}
     92EXPORT_SYMBOL(ieee802154_xmit_complete);
     93
     94void ieee802154_xmit_error(struct ieee802154_hw *hw, struct sk_buff *skb,
     95			   int reason)
     96{
     97	struct ieee802154_local *local = hw_to_local(hw);
     98
     99	local->tx_result = reason;
    100	ieee802154_wake_queue(hw);
    101	dev_kfree_skb_any(skb);
    102}
    103EXPORT_SYMBOL(ieee802154_xmit_error);
    104
    105void ieee802154_xmit_hw_error(struct ieee802154_hw *hw, struct sk_buff *skb)
    106{
    107	ieee802154_xmit_error(hw, skb, IEEE802154_SYSTEM_ERROR);
    108}
    109EXPORT_SYMBOL(ieee802154_xmit_hw_error);
    110
    111void ieee802154_stop_device(struct ieee802154_local *local)
    112{
    113	flush_workqueue(local->workqueue);
    114	hrtimer_cancel(&local->ifs_timer);
    115	drv_stop(local);
    116}