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