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 */
19const void *const mac802154_wpan_phy_privid = &mac802154_wpan_phy_privid;
20
21void 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}
35EXPORT_SYMBOL(ieee802154_wake_queue);
36
37void 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}
51EXPORT_SYMBOL(ieee802154_stop_queue);
52
53enum 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
63void 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}
95EXPORT_SYMBOL(ieee802154_xmit_complete);
96