1 // SPDX-License-Identifier: GPL-2.0-only 1 // SPDX-License-Identifier: GPL-2.0-only
2 /* 2 /*
3 * 3 *
4 * Authors: 4 * Authors:
5 * Alexander Aring <aar@pengutronix.de> 5 * Alexander Aring <aar@pengutronix.de>
6 * 6 *
7 * Based on: net/mac80211/util.c 7 * Based on: net/mac80211/util.c
8 */ 8 */
9 9
10 #include "ieee802154_i.h" 10 #include "ieee802154_i.h"
11 #include "driver-ops.h" 11 #include "driver-ops.h"
12 12
13 /* privid for wpan_phys to determine whether t 13 /* privid for wpan_phys to determine whether they belong to us or not */
14 const void *const mac802154_wpan_phy_privid = 14 const void *const mac802154_wpan_phy_privid = &mac802154_wpan_phy_privid;
15 15
16 /** !! 16 void ieee802154_wake_queue(struct ieee802154_hw *hw)
17 * ieee802154_wake_queue - wake ieee802154 que <<
18 * @hw: main hardware object <<
19 * <<
20 * Tranceivers usually have either one transmi <<
21 * for both transmitting and receiving. Hence, <<
22 * one frame at a time for each phy, which mea <<
23 * avoid new skb to come during the transmissi <<
24 * woken up after the operation. <<
25 */ <<
26 static void ieee802154_wake_queue(struct ieee8 <<
27 { 17 {
28 struct ieee802154_local *local = hw_to 18 struct ieee802154_local *local = hw_to_local(hw);
29 struct ieee802154_sub_if_data *sdata; 19 struct ieee802154_sub_if_data *sdata;
30 20
31 rcu_read_lock(); 21 rcu_read_lock();
32 clear_bit(WPAN_PHY_FLAG_STATE_QUEUE_ST <<
33 list_for_each_entry_rcu(sdata, &local- 22 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
34 if (!sdata->dev) 23 if (!sdata->dev)
35 continue; 24 continue;
36 25
37 netif_wake_queue(sdata->dev); 26 netif_wake_queue(sdata->dev);
38 } 27 }
39 rcu_read_unlock(); 28 rcu_read_unlock();
40 } 29 }
>> 30 EXPORT_SYMBOL(ieee802154_wake_queue);
41 31
42 /** !! 32 void ieee802154_stop_queue(struct ieee802154_hw *hw)
43 * ieee802154_stop_queue - stop ieee802154 que <<
44 * @hw: main hardware object <<
45 * <<
46 * Tranceivers usually have either one transmi <<
47 * for both transmitting and receiving. Hence, <<
48 * one frame at a time for each phy, which mea <<
49 * stop giving us new skbs while we are busy w <<
50 * must then be stopped before transmitting. <<
51 */ <<
52 static void ieee802154_stop_queue(struct ieee8 <<
53 { 33 {
54 struct ieee802154_local *local = hw_to 34 struct ieee802154_local *local = hw_to_local(hw);
55 struct ieee802154_sub_if_data *sdata; 35 struct ieee802154_sub_if_data *sdata;
56 36
57 rcu_read_lock(); 37 rcu_read_lock();
58 list_for_each_entry_rcu(sdata, &local- 38 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
59 if (!sdata->dev) 39 if (!sdata->dev)
60 continue; 40 continue;
61 41
62 netif_stop_queue(sdata->dev); 42 netif_stop_queue(sdata->dev);
63 } 43 }
64 rcu_read_unlock(); 44 rcu_read_unlock();
65 } 45 }
66 !! 46 EXPORT_SYMBOL(ieee802154_stop_queue);
67 void ieee802154_hold_queue(struct ieee802154_l <<
68 { <<
69 unsigned long flags; <<
70 <<
71 spin_lock_irqsave(&local->phy->queue_l <<
72 if (!atomic_fetch_inc(&local->phy->hol <<
73 ieee802154_stop_queue(&local-> <<
74 spin_unlock_irqrestore(&local->phy->qu <<
75 } <<
76 <<
77 void ieee802154_release_queue(struct ieee80215 <<
78 { <<
79 unsigned long flags; <<
80 <<
81 spin_lock_irqsave(&local->phy->queue_l <<
82 if (atomic_dec_and_test(&local->phy->h <<
83 ieee802154_wake_queue(&local-> <<
84 spin_unlock_irqrestore(&local->phy->qu <<
85 } <<
86 <<
87 void ieee802154_disable_queue(struct ieee80215 <<
88 { <<
89 struct ieee802154_sub_if_data *sdata; <<
90 <<
91 rcu_read_lock(); <<
92 list_for_each_entry_rcu(sdata, &local- <<
93 if (!sdata->dev) <<
94 continue; <<
95 <<
96 netif_tx_disable(sdata->dev); <<
97 } <<
98 rcu_read_unlock(); <<
99 } <<
100 47
101 enum hrtimer_restart ieee802154_xmit_ifs_timer 48 enum hrtimer_restart ieee802154_xmit_ifs_timer(struct hrtimer *timer)
102 { 49 {
103 struct ieee802154_local *local = 50 struct ieee802154_local *local =
104 container_of(timer, struct iee 51 container_of(timer, struct ieee802154_local, ifs_timer);
105 52
106 ieee802154_release_queue(local); !! 53 ieee802154_wake_queue(&local->hw);
107 54
108 return HRTIMER_NORESTART; 55 return HRTIMER_NORESTART;
109 } 56 }
110 57
111 void ieee802154_xmit_complete(struct ieee80215 58 void ieee802154_xmit_complete(struct ieee802154_hw *hw, struct sk_buff *skb,
112 bool ifs_handlin 59 bool ifs_handling)
113 { 60 {
114 struct ieee802154_local *local = hw_to <<
115 <<
116 local->tx_result = IEEE802154_SUCCESS; <<
117 <<
118 if (ifs_handling) { 61 if (ifs_handling) {
>> 62 struct ieee802154_local *local = hw_to_local(hw);
119 u8 max_sifs_size; 63 u8 max_sifs_size;
120 64
121 /* If transceiver sets CRC on 65 /* If transceiver sets CRC on his own we need to use lifs
122 * threshold len above 16 othe 66 * threshold len above 16 otherwise 18, because it's not
123 * part of skb->len. 67 * part of skb->len.
124 */ 68 */
125 if (hw->flags & IEEE802154_HW_ 69 if (hw->flags & IEEE802154_HW_TX_OMIT_CKSUM)
126 max_sifs_size = IEEE80 70 max_sifs_size = IEEE802154_MAX_SIFS_FRAME_SIZE -
127 IEEE80 71 IEEE802154_FCS_LEN;
128 else 72 else
129 max_sifs_size = IEEE80 73 max_sifs_size = IEEE802154_MAX_SIFS_FRAME_SIZE;
130 74
131 if (skb->len > max_sifs_size) 75 if (skb->len > max_sifs_size)
132 hrtimer_start(&local-> 76 hrtimer_start(&local->ifs_timer,
133 hw->phy- 77 hw->phy->lifs_period * NSEC_PER_USEC,
134 HRTIMER_ 78 HRTIMER_MODE_REL);
135 else 79 else
136 hrtimer_start(&local-> 80 hrtimer_start(&local->ifs_timer,
137 hw->phy- 81 hw->phy->sifs_period * NSEC_PER_USEC,
138 HRTIMER_ 82 HRTIMER_MODE_REL);
139 } else { 83 } else {
140 ieee802154_release_queue(local !! 84 ieee802154_wake_queue(hw);
141 } 85 }
142 86
143 dev_consume_skb_any(skb); 87 dev_consume_skb_any(skb);
144 if (atomic_dec_and_test(&hw->phy->ongo <<
145 wake_up(&hw->phy->sync_txq); <<
146 } 88 }
147 EXPORT_SYMBOL(ieee802154_xmit_complete); 89 EXPORT_SYMBOL(ieee802154_xmit_complete);
148 <<
149 void ieee802154_xmit_error(struct ieee802154_h <<
150 int reason) <<
151 { <<
152 struct ieee802154_local *local = hw_to <<
153 <<
154 local->tx_result = reason; <<
155 ieee802154_release_queue(local); <<
156 dev_kfree_skb_any(skb); <<
157 if (atomic_dec_and_test(&hw->phy->ongo <<
158 wake_up(&hw->phy->sync_txq); <<
159 } <<
160 EXPORT_SYMBOL(ieee802154_xmit_error); <<
161 <<
162 void ieee802154_xmit_hw_error(struct ieee80215 <<
163 { <<
164 ieee802154_xmit_error(hw, skb, IEEE802 <<
165 } <<
166 EXPORT_SYMBOL(ieee802154_xmit_hw_error); <<
167 90
168 void ieee802154_stop_device(struct ieee802154_ 91 void ieee802154_stop_device(struct ieee802154_local *local)
169 { 92 {
170 flush_workqueue(local->workqueue); 93 flush_workqueue(local->workqueue);
171 hrtimer_cancel(&local->ifs_timer); 94 hrtimer_cancel(&local->ifs_timer);
172 drv_stop(local); 95 drv_stop(local);
173 } 96 }
174 97
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