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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2007-2012 Siemens AG
4 *
5 * Written by:
6 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
7 */
8
9#include <linux/kernel.h>
10#include <linux/module.h>
11#include <linux/netdevice.h>
12
13#include <net/netlink.h>
14#include <net/nl802154.h>
15#include <net/mac802154.h>
16#include <net/ieee802154_netdev.h>
17#include <net/route.h>
18#include <net/cfg802154.h>
19
20#include "ieee802154_i.h"
21#include "cfg.h"
22
23static void ieee802154_tasklet_handler(struct tasklet_struct *t)
24{
25 struct ieee802154_local *local = from_tasklet(local, t, tasklet);
26 struct sk_buff *skb;
27
28 while ((skb = skb_dequeue(&local->skb_queue))) {
29 switch (skb->pkt_type) {
30 case IEEE802154_RX_MSG:
31 /* Clear skb->pkt_type in order to not confuse kernel
32 * netstack.
33 */
34 skb->pkt_type = 0;
35 ieee802154_rx(local, skb);
36 break;
37 default:
38 WARN(1, "mac802154: Packet is of unknown type %d\n",
39 skb->pkt_type);
40 kfree_skb(skb);
41 break;
42 }
43 }
44}
45
46struct ieee802154_hw *
47ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops)
48{
49 struct wpan_phy *phy;
50 struct ieee802154_local *local;
51 size_t priv_size;
52
53 if (WARN_ON(!ops || !(ops->xmit_async || ops->xmit_sync) || !ops->ed ||
54 !ops->start || !ops->stop || !ops->set_channel))
55 return NULL;
56
57 /* Ensure 32-byte alignment of our private data and hw private data.
58 * We use the wpan_phy priv data for both our ieee802154_local and for
59 * the driver's private data
60 *
61 * in memory it'll be like this:
62 *
63 * +-------------------------+
64 * | struct wpan_phy |
65 * +-------------------------+
66 * | struct ieee802154_local |
67 * +-------------------------+
68 * | driver's private data |
69 * +-------------------------+
70 *
71 * Due to ieee802154 layer isn't aware of driver and MAC structures,
72 * so lets align them here.
73 */
74
75 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
76
77 phy = wpan_phy_new(&mac802154_config_ops, priv_size);
78 if (!phy) {
79 pr_err("failure to allocate master IEEE802.15.4 device\n");
80 return NULL;
81 }
82
83 phy->privid = mac802154_wpan_phy_privid;
84
85 local = wpan_phy_priv(phy);
86 local->phy = phy;
87 local->hw.phy = local->phy;
88 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
89 local->ops = ops;
90
91 INIT_LIST_HEAD(&local->interfaces);
92 mutex_init(&local->iflist_mtx);
93
94 tasklet_setup(&local->tasklet, ieee802154_tasklet_handler);
95
96 skb_queue_head_init(&local->skb_queue);
97
98 INIT_WORK(&local->tx_work, ieee802154_xmit_worker);
99
100 /* init supported flags with 802.15.4 default ranges */
101 phy->supported.max_minbe = 8;
102 phy->supported.min_maxbe = 3;
103 phy->supported.max_maxbe = 8;
104 phy->supported.min_frame_retries = 0;
105 phy->supported.max_frame_retries = 7;
106 phy->supported.max_csma_backoffs = 5;
107 phy->supported.lbt = NL802154_SUPPORTED_BOOL_FALSE;
108
109 /* always supported */
110 phy->supported.iftypes = BIT(NL802154_IFTYPE_NODE);
111
112 return &local->hw;
113}
114EXPORT_SYMBOL(ieee802154_alloc_hw);
115
116void ieee802154_free_hw(struct ieee802154_hw *hw)
117{
118 struct ieee802154_local *local = hw_to_local(hw);
119
120 BUG_ON(!list_empty(&local->interfaces));
121
122 mutex_destroy(&local->iflist_mtx);
123
124 wpan_phy_free(local->phy);
125}
126EXPORT_SYMBOL(ieee802154_free_hw);
127
128static void ieee802154_setup_wpan_phy_pib(struct wpan_phy *wpan_phy)
129{
130 /* TODO warn on empty symbol_duration
131 * Should be done when all drivers sets this value.
132 */
133
134 wpan_phy->lifs_period = IEEE802154_LIFS_PERIOD *
135 wpan_phy->symbol_duration;
136 wpan_phy->sifs_period = IEEE802154_SIFS_PERIOD *
137 wpan_phy->symbol_duration;
138}
139
140int ieee802154_register_hw(struct ieee802154_hw *hw)
141{
142 struct ieee802154_local *local = hw_to_local(hw);
143 struct net_device *dev;
144 int rc = -ENOSYS;
145
146 local->workqueue =
147 create_singlethread_workqueue(wpan_phy_name(local->phy));
148 if (!local->workqueue) {
149 rc = -ENOMEM;
150 goto out;
151 }
152
153 hrtimer_init(&local->ifs_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
154 local->ifs_timer.function = ieee802154_xmit_ifs_timer;
155
156 wpan_phy_set_dev(local->phy, local->hw.parent);
157
158 ieee802154_setup_wpan_phy_pib(local->phy);
159
160 if (!(hw->flags & IEEE802154_HW_CSMA_PARAMS)) {
161 local->phy->supported.min_csma_backoffs = 4;
162 local->phy->supported.max_csma_backoffs = 4;
163 local->phy->supported.min_maxbe = 5;
164 local->phy->supported.max_maxbe = 5;
165 local->phy->supported.min_minbe = 3;
166 local->phy->supported.max_minbe = 3;
167 }
168
169 if (!(hw->flags & IEEE802154_HW_FRAME_RETRIES)) {
170 local->phy->supported.min_frame_retries = 3;
171 local->phy->supported.max_frame_retries = 3;
172 }
173
174 if (hw->flags & IEEE802154_HW_PROMISCUOUS)
175 local->phy->supported.iftypes |= BIT(NL802154_IFTYPE_MONITOR);
176
177 rc = wpan_phy_register(local->phy);
178 if (rc < 0)
179 goto out_wq;
180
181 rtnl_lock();
182
183 dev = ieee802154_if_add(local, "wpan%d", NET_NAME_ENUM,
184 NL802154_IFTYPE_NODE,
185 cpu_to_le64(0x0000000000000000ULL));
186 if (IS_ERR(dev)) {
187 rtnl_unlock();
188 rc = PTR_ERR(dev);
189 goto out_phy;
190 }
191
192 rtnl_unlock();
193
194 return 0;
195
196out_phy:
197 wpan_phy_unregister(local->phy);
198out_wq:
199 destroy_workqueue(local->workqueue);
200out:
201 return rc;
202}
203EXPORT_SYMBOL(ieee802154_register_hw);
204
205void ieee802154_unregister_hw(struct ieee802154_hw *hw)
206{
207 struct ieee802154_local *local = hw_to_local(hw);
208
209 tasklet_kill(&local->tasklet);
210 flush_workqueue(local->workqueue);
211
212 rtnl_lock();
213
214 ieee802154_remove_interfaces(local);
215
216 rtnl_unlock();
217
218 destroy_workqueue(local->workqueue);
219 wpan_phy_unregister(local->phy);
220}
221EXPORT_SYMBOL(ieee802154_unregister_hw);
222
223static int __init ieee802154_init(void)
224{
225 return ieee802154_iface_init();
226}
227
228static void __exit ieee802154_exit(void)
229{
230 ieee802154_iface_exit();
231
232 rcu_barrier();
233}
234
235subsys_initcall(ieee802154_init);
236module_exit(ieee802154_exit);
237
238MODULE_DESCRIPTION("IEEE 802.15.4 subsystem");
239MODULE_LICENSE("GPL v2");
1/*
2 * Copyright (C) 2007-2012 Siemens AG
3 *
4 * Written by:
5 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2
9 * as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 */
16
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/netdevice.h>
20
21#include <net/netlink.h>
22#include <net/nl802154.h>
23#include <net/mac802154.h>
24#include <net/ieee802154_netdev.h>
25#include <net/route.h>
26#include <net/cfg802154.h>
27
28#include "ieee802154_i.h"
29#include "cfg.h"
30
31static void ieee802154_tasklet_handler(unsigned long data)
32{
33 struct ieee802154_local *local = (struct ieee802154_local *)data;
34 struct sk_buff *skb;
35
36 while ((skb = skb_dequeue(&local->skb_queue))) {
37 switch (skb->pkt_type) {
38 case IEEE802154_RX_MSG:
39 /* Clear skb->pkt_type in order to not confuse kernel
40 * netstack.
41 */
42 skb->pkt_type = 0;
43 ieee802154_rx(local, skb);
44 break;
45 default:
46 WARN(1, "mac802154: Packet is of unknown type %d\n",
47 skb->pkt_type);
48 kfree_skb(skb);
49 break;
50 }
51 }
52}
53
54struct ieee802154_hw *
55ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops)
56{
57 struct wpan_phy *phy;
58 struct ieee802154_local *local;
59 size_t priv_size;
60
61 if (WARN_ON(!ops || !(ops->xmit_async || ops->xmit_sync) || !ops->ed ||
62 !ops->start || !ops->stop || !ops->set_channel))
63 return NULL;
64
65 /* Ensure 32-byte alignment of our private data and hw private data.
66 * We use the wpan_phy priv data for both our ieee802154_local and for
67 * the driver's private data
68 *
69 * in memory it'll be like this:
70 *
71 * +-------------------------+
72 * | struct wpan_phy |
73 * +-------------------------+
74 * | struct ieee802154_local |
75 * +-------------------------+
76 * | driver's private data |
77 * +-------------------------+
78 *
79 * Due to ieee802154 layer isn't aware of driver and MAC structures,
80 * so lets align them here.
81 */
82
83 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
84
85 phy = wpan_phy_new(&mac802154_config_ops, priv_size);
86 if (!phy) {
87 pr_err("failure to allocate master IEEE802.15.4 device\n");
88 return NULL;
89 }
90
91 phy->privid = mac802154_wpan_phy_privid;
92
93 local = wpan_phy_priv(phy);
94 local->phy = phy;
95 local->hw.phy = local->phy;
96 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
97 local->ops = ops;
98
99 INIT_LIST_HEAD(&local->interfaces);
100 mutex_init(&local->iflist_mtx);
101
102 tasklet_init(&local->tasklet,
103 ieee802154_tasklet_handler,
104 (unsigned long)local);
105
106 skb_queue_head_init(&local->skb_queue);
107
108 INIT_WORK(&local->tx_work, ieee802154_xmit_worker);
109
110 /* init supported flags with 802.15.4 default ranges */
111 phy->supported.max_minbe = 8;
112 phy->supported.min_maxbe = 3;
113 phy->supported.max_maxbe = 8;
114 phy->supported.min_frame_retries = 0;
115 phy->supported.max_frame_retries = 7;
116 phy->supported.max_csma_backoffs = 5;
117 phy->supported.lbt = NL802154_SUPPORTED_BOOL_FALSE;
118
119 /* always supported */
120 phy->supported.iftypes = BIT(NL802154_IFTYPE_NODE);
121
122 return &local->hw;
123}
124EXPORT_SYMBOL(ieee802154_alloc_hw);
125
126void ieee802154_free_hw(struct ieee802154_hw *hw)
127{
128 struct ieee802154_local *local = hw_to_local(hw);
129
130 BUG_ON(!list_empty(&local->interfaces));
131
132 mutex_destroy(&local->iflist_mtx);
133
134 wpan_phy_free(local->phy);
135}
136EXPORT_SYMBOL(ieee802154_free_hw);
137
138static void ieee802154_setup_wpan_phy_pib(struct wpan_phy *wpan_phy)
139{
140 /* TODO warn on empty symbol_duration
141 * Should be done when all drivers sets this value.
142 */
143
144 wpan_phy->lifs_period = IEEE802154_LIFS_PERIOD *
145 wpan_phy->symbol_duration;
146 wpan_phy->sifs_period = IEEE802154_SIFS_PERIOD *
147 wpan_phy->symbol_duration;
148}
149
150int ieee802154_register_hw(struct ieee802154_hw *hw)
151{
152 struct ieee802154_local *local = hw_to_local(hw);
153 struct net_device *dev;
154 int rc = -ENOSYS;
155
156 local->workqueue =
157 create_singlethread_workqueue(wpan_phy_name(local->phy));
158 if (!local->workqueue) {
159 rc = -ENOMEM;
160 goto out;
161 }
162
163 hrtimer_init(&local->ifs_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
164 local->ifs_timer.function = ieee802154_xmit_ifs_timer;
165
166 wpan_phy_set_dev(local->phy, local->hw.parent);
167
168 ieee802154_setup_wpan_phy_pib(local->phy);
169
170 if (!(hw->flags & IEEE802154_HW_CSMA_PARAMS)) {
171 local->phy->supported.min_csma_backoffs = 4;
172 local->phy->supported.max_csma_backoffs = 4;
173 local->phy->supported.min_maxbe = 5;
174 local->phy->supported.max_maxbe = 5;
175 local->phy->supported.min_minbe = 3;
176 local->phy->supported.max_minbe = 3;
177 }
178
179 if (!(hw->flags & IEEE802154_HW_FRAME_RETRIES)) {
180 local->phy->supported.min_frame_retries = 3;
181 local->phy->supported.max_frame_retries = 3;
182 }
183
184 if (hw->flags & IEEE802154_HW_PROMISCUOUS)
185 local->phy->supported.iftypes |= BIT(NL802154_IFTYPE_MONITOR);
186
187 rc = wpan_phy_register(local->phy);
188 if (rc < 0)
189 goto out_wq;
190
191 rtnl_lock();
192
193 dev = ieee802154_if_add(local, "wpan%d", NET_NAME_ENUM,
194 NL802154_IFTYPE_NODE,
195 cpu_to_le64(0x0000000000000000ULL));
196 if (IS_ERR(dev)) {
197 rtnl_unlock();
198 rc = PTR_ERR(dev);
199 goto out_phy;
200 }
201
202 rtnl_unlock();
203
204 return 0;
205
206out_phy:
207 wpan_phy_unregister(local->phy);
208out_wq:
209 destroy_workqueue(local->workqueue);
210out:
211 return rc;
212}
213EXPORT_SYMBOL(ieee802154_register_hw);
214
215void ieee802154_unregister_hw(struct ieee802154_hw *hw)
216{
217 struct ieee802154_local *local = hw_to_local(hw);
218
219 tasklet_kill(&local->tasklet);
220 flush_workqueue(local->workqueue);
221
222 rtnl_lock();
223
224 ieee802154_remove_interfaces(local);
225
226 rtnl_unlock();
227
228 destroy_workqueue(local->workqueue);
229 wpan_phy_unregister(local->phy);
230}
231EXPORT_SYMBOL(ieee802154_unregister_hw);
232
233static int __init ieee802154_init(void)
234{
235 return ieee802154_iface_init();
236}
237
238static void __exit ieee802154_exit(void)
239{
240 ieee802154_iface_exit();
241
242 rcu_barrier();
243}
244
245subsys_initcall(ieee802154_init);
246module_exit(ieee802154_exit);
247
248MODULE_DESCRIPTION("IEEE 802.15.4 subsystem");
249MODULE_LICENSE("GPL v2");