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c2085103 AA |
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 | ||
6322d50d AA |
18 | /* privid for wpan_phys to determine whether they belong to us or not */ |
19 | const void *const mac802154_wpan_phy_privid = &mac802154_wpan_phy_privid; | |
20 | ||
c2085103 AA |
21 | void 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 | } | |
35 | EXPORT_SYMBOL(ieee802154_wake_queue); | |
36 | ||
37 | void 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 | } | |
51 | EXPORT_SYMBOL(ieee802154_stop_queue); | |
52 | ||
61f2dcba | 53 | enum hrtimer_restart ieee802154_xmit_ifs_timer(struct hrtimer *timer) |
c2085103 | 54 | { |
61f2dcba AA |
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 | ||
63 | void 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); | |
3f3c4bb5 | 68 | u8 max_sifs_size; |
61f2dcba | 69 | |
3f3c4bb5 AA |
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) | |
61f2dcba AA |
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 | } | |
c2085103 AA |
94 | } |
95 | EXPORT_SYMBOL(ieee802154_xmit_complete); |