blob: f9fd0957ab67f256d10e80563bb68ce88334f911 [file] [log] [blame]
Alexander Aringc2085102014-10-26 09:37:05 +01001/* 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"
Alexander Aringc4227c82015-06-24 11:36:34 +020017#include "driver-ops.h"
Alexander Aringc2085102014-10-26 09:37:05 +010018
Alexander Aring6322d502014-11-12 03:36:51 +010019/* 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
Alexander Aringc2085102014-10-26 09:37:05 +010022void 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
Alexander Aring61f2dcb2014-11-12 19:51:56 +010054enum hrtimer_restart ieee802154_xmit_ifs_timer(struct hrtimer *timer)
Alexander Aringc2085102014-10-26 09:37:05 +010055{
Alexander Aring61f2dcb2014-11-12 19:51:56 +010056 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);
Alexander Aring3f3c4bb2015-03-04 21:19:59 +010069 u8 max_sifs_size;
Alexander Aring61f2dcb2014-11-12 19:51:56 +010070
Alexander Aring3f3c4bb2015-03-04 21:19:59 +010071 /* 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)
Alexander Aring61f2dcb2014-11-12 19:51:56 +010082 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);
Alexander Aring61f2dcb2014-11-12 19:51:56 +010089 } else {
90 ieee802154_wake_queue(hw);
Alexander Aring61f2dcb2014-11-12 19:51:56 +010091 }
Alexander Aring3862eba2015-05-17 21:44:56 +020092
93 dev_consume_skb_any(skb);
Alexander Aringc2085102014-10-26 09:37:05 +010094}
95EXPORT_SYMBOL(ieee802154_xmit_complete);
Alexander Aringc4227c82015-06-24 11:36:34 +020096
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}