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 */
14 const void *const mac802154_wpan_phy_privid = &mac802154_wpan_phy_privid;
15
ieee802154_wake_queue(struct ieee802154_hw * hw)16 void 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 }
30 EXPORT_SYMBOL(ieee802154_wake_queue);
31
ieee802154_stop_queue(struct ieee802154_hw * hw)32 void 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 }
46 EXPORT_SYMBOL(ieee802154_stop_queue);
47
ieee802154_xmit_ifs_timer(struct hrtimer * timer)48 enum 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
ieee802154_xmit_complete(struct ieee802154_hw * hw,struct sk_buff * skb,bool ifs_handling)58 void ieee802154_xmit_complete(struct ieee802154_hw *hw, struct sk_buff *skb,
59 bool ifs_handling)
60 {
61 if (ifs_handling) {
62 struct ieee802154_local *local = hw_to_local(hw);
63 u8 max_sifs_size;
64
65 /* If transceiver sets CRC on his own we need to use lifs
66 * threshold len above 16 otherwise 18, because it's not
67 * part of skb->len.
68 */
69 if (hw->flags & IEEE802154_HW_TX_OMIT_CKSUM)
70 max_sifs_size = IEEE802154_MAX_SIFS_FRAME_SIZE -
71 IEEE802154_FCS_LEN;
72 else
73 max_sifs_size = IEEE802154_MAX_SIFS_FRAME_SIZE;
74
75 if (skb->len > max_sifs_size)
76 hrtimer_start(&local->ifs_timer,
77 hw->phy->lifs_period * NSEC_PER_USEC,
78 HRTIMER_MODE_REL);
79 else
80 hrtimer_start(&local->ifs_timer,
81 hw->phy->sifs_period * NSEC_PER_USEC,
82 HRTIMER_MODE_REL);
83 } else {
84 ieee802154_wake_queue(hw);
85 }
86
87 dev_consume_skb_any(skb);
88 }
89 EXPORT_SYMBOL(ieee802154_xmit_complete);
90
ieee802154_stop_device(struct ieee802154_local * local)91 void ieee802154_stop_device(struct ieee802154_local *local)
92 {
93 flush_workqueue(local->workqueue);
94 hrtimer_cancel(&local->ifs_timer);
95 drv_stop(local);
96 }
97