1 /* This program is free software; you can redistribute it and/or modify 2 * it under the terms of the GNU General Public License version 2 3 * as published by the Free Software Foundation. 4 * 5 * This program is distributed in the hope that it will be useful, 6 * but WITHOUT ANY WARRANTY; without even the implied warranty of 7 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 8 * GNU General Public License for more details. 9 * 10 * Authors: 11 * Alexander Aring <aar@pengutronix.de> 12 * 13 * Based on: net/mac80211/util.c 14 */ 15 16 #include "ieee802154_i.h" 17 18 /* privid for wpan_phys to determine whether they belong to us or not */ 19 const void *const mac802154_wpan_phy_privid = &mac802154_wpan_phy_privid; 20 21 void ieee802154_wake_queue(struct ieee802154_hw *hw) 22 { 23 struct ieee802154_local *local = hw_to_local(hw); 24 struct ieee802154_sub_if_data *sdata; 25 26 rcu_read_lock(); 27 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 28 if (!sdata->dev) 29 continue; 30 31 netif_wake_queue(sdata->dev); 32 } 33 rcu_read_unlock(); 34 } 35 EXPORT_SYMBOL(ieee802154_wake_queue); 36 37 void ieee802154_stop_queue(struct ieee802154_hw *hw) 38 { 39 struct ieee802154_local *local = hw_to_local(hw); 40 struct ieee802154_sub_if_data *sdata; 41 42 rcu_read_lock(); 43 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 44 if (!sdata->dev) 45 continue; 46 47 netif_stop_queue(sdata->dev); 48 } 49 rcu_read_unlock(); 50 } 51 EXPORT_SYMBOL(ieee802154_stop_queue); 52 53 enum hrtimer_restart ieee802154_xmit_ifs_timer(struct hrtimer *timer) 54 { 55 struct ieee802154_local *local = 56 container_of(timer, struct ieee802154_local, ifs_timer); 57 58 ieee802154_wake_queue(&local->hw); 59 60 return HRTIMER_NORESTART; 61 } 62 63 void ieee802154_xmit_complete(struct ieee802154_hw *hw, struct sk_buff *skb, 64 bool ifs_handling) 65 { 66 if (ifs_handling) { 67 struct ieee802154_local *local = hw_to_local(hw); 68 u8 max_sifs_size; 69 70 /* If transceiver sets CRC on his own we need to use lifs 71 * threshold len above 16 otherwise 18, because it's not 72 * part of skb->len. 73 */ 74 if (hw->flags & IEEE802154_HW_TX_OMIT_CKSUM) 75 max_sifs_size = IEEE802154_MAX_SIFS_FRAME_SIZE - 76 IEEE802154_FCS_LEN; 77 else 78 max_sifs_size = IEEE802154_MAX_SIFS_FRAME_SIZE; 79 80 if (skb->len > max_sifs_size) 81 hrtimer_start(&local->ifs_timer, 82 ktime_set(0, hw->phy->lifs_period * NSEC_PER_USEC), 83 HRTIMER_MODE_REL); 84 else 85 hrtimer_start(&local->ifs_timer, 86 ktime_set(0, hw->phy->sifs_period * NSEC_PER_USEC), 87 HRTIMER_MODE_REL); 88 89 consume_skb(skb); 90 } else { 91 ieee802154_wake_queue(hw); 92 consume_skb(skb); 93 } 94 } 95 EXPORT_SYMBOL(ieee802154_xmit_complete); 96