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#include "driver-ops.h"
18
19/* privid for wpan_phys to determine whether they belong to us or not */
20const void *const mac802154_wpan_phy_privid = &mac802154_wpan_phy_privid;
21
22void ieee802154_wake_queue(struct ieee802154_hw *hw)
23{
24	struct ieee802154_local *local = hw_to_local(hw);
25	struct ieee802154_sub_if_data *sdata;
26
27	rcu_read_lock();
28	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
29		if (!sdata->dev)
30			continue;
31
32		netif_wake_queue(sdata->dev);
33	}
34	rcu_read_unlock();
35}
36EXPORT_SYMBOL(ieee802154_wake_queue);
37
38void ieee802154_stop_queue(struct ieee802154_hw *hw)
39{
40	struct ieee802154_local *local = hw_to_local(hw);
41	struct ieee802154_sub_if_data *sdata;
42
43	rcu_read_lock();
44	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
45		if (!sdata->dev)
46			continue;
47
48		netif_stop_queue(sdata->dev);
49	}
50	rcu_read_unlock();
51}
52EXPORT_SYMBOL(ieee802154_stop_queue);
53
54enum hrtimer_restart ieee802154_xmit_ifs_timer(struct hrtimer *timer)
55{
56	struct ieee802154_local *local =
57		container_of(timer, struct ieee802154_local, ifs_timer);
58
59	ieee802154_wake_queue(&local->hw);
60
61	return HRTIMER_NORESTART;
62}
63
64void ieee802154_xmit_complete(struct ieee802154_hw *hw, struct sk_buff *skb,
65			      bool ifs_handling)
66{
67	if (ifs_handling) {
68		struct ieee802154_local *local = hw_to_local(hw);
69		u8 max_sifs_size;
70
71		/* If transceiver sets CRC on his own we need to use lifs
72		 * threshold len above 16 otherwise 18, because it's not
73		 * part of skb->len.
74		 */
75		if (hw->flags & IEEE802154_HW_TX_OMIT_CKSUM)
76			max_sifs_size = IEEE802154_MAX_SIFS_FRAME_SIZE -
77					IEEE802154_FCS_LEN;
78		else
79			max_sifs_size = IEEE802154_MAX_SIFS_FRAME_SIZE;
80
81		if (skb->len > max_sifs_size)
82			hrtimer_start(&local->ifs_timer,
83				      ktime_set(0, hw->phy->lifs_period * NSEC_PER_USEC),
84				      HRTIMER_MODE_REL);
85		else
86			hrtimer_start(&local->ifs_timer,
87				      ktime_set(0, hw->phy->sifs_period * NSEC_PER_USEC),
88				      HRTIMER_MODE_REL);
89	} else {
90		ieee802154_wake_queue(hw);
91	}
92
93	dev_consume_skb_any(skb);
94}
95EXPORT_SYMBOL(ieee802154_xmit_complete);
96
97void ieee802154_stop_device(struct ieee802154_local *local)
98{
99	flush_workqueue(local->workqueue);
100	hrtimer_cancel(&local->ifs_timer);
101	drv_stop(local);
102}
103