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1802d0be | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1010f540 | 2 | /* |
3 | * Copyright (C) 2007-2012 Siemens AG | |
4 | * | |
5 | * Written by: | |
6 | * Alexander Smirnov <alex.bluesman.smirnov@gmail.com> | |
1010f540 | 7 | */ |
8 | ||
9 | #include <linux/kernel.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/netdevice.h> | |
12 | ||
62610ad2 | 13 | #include <net/netlink.h> |
944742a3 | 14 | #include <net/nl802154.h> |
1010f540 | 15 | #include <net/mac802154.h> |
b70ab2e8 | 16 | #include <net/ieee802154_netdev.h> |
1010f540 | 17 | #include <net/route.h> |
5ad60d36 | 18 | #include <net/cfg802154.h> |
1010f540 | 19 | |
0f1556bc | 20 | #include "ieee802154_i.h" |
1201cd22 | 21 | #include "cfg.h" |
1010f540 | 22 | |
c5c47e67 AA |
23 | static void ieee802154_tasklet_handler(unsigned long data) |
24 | { | |
25 | struct ieee802154_local *local = (struct ieee802154_local *)data; | |
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; | |
d10270ce | 35 | ieee802154_rx(local, skb); |
c5c47e67 AA |
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 | ||
5a504397 | 46 | struct ieee802154_hw * |
16301861 | 47 | ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops) |
1010f540 | 48 | { |
49 | struct wpan_phy *phy; | |
a5e1ec53 | 50 | struct ieee802154_local *local; |
1010f540 | 51 | size_t priv_size; |
52 | ||
8f451829 VB |
53 | if (WARN_ON(!ops || !(ops->xmit_async || ops->xmit_sync) || !ops->ed || |
54 | !ops->start || !ops->stop || !ops->set_channel)) | |
1010f540 | 55 | return NULL; |
1010f540 | 56 | |
57 | /* Ensure 32-byte alignment of our private data and hw private data. | |
a5e1ec53 | 58 | * We use the wpan_phy priv data for both our ieee802154_local and for |
1010f540 | 59 | * the driver's private data |
60 | * | |
61 | * in memory it'll be like this: | |
62 | * | |
a5e1ec53 AA |
63 | * +-------------------------+ |
64 | * | struct wpan_phy | | |
65 | * +-------------------------+ | |
66 | * | struct ieee802154_local | | |
67 | * +-------------------------+ | |
68 | * | driver's private data | | |
69 | * +-------------------------+ | |
1010f540 | 70 | * |
71 | * Due to ieee802154 layer isn't aware of driver and MAC structures, | |
139f14ad | 72 | * so lets align them here. |
1010f540 | 73 | */ |
74 | ||
a5e1ec53 | 75 | priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; |
1010f540 | 76 | |
f601379f | 77 | phy = wpan_phy_new(&mac802154_config_ops, priv_size); |
1010f540 | 78 | if (!phy) { |
83a1a7ce | 79 | pr_err("failure to allocate master IEEE802.15.4 device\n"); |
1010f540 | 80 | return NULL; |
81 | } | |
82 | ||
6322d50d AA |
83 | phy->privid = mac802154_wpan_phy_privid; |
84 | ||
a5e1ec53 AA |
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; | |
1010f540 | 90 | |
d98be45b AA |
91 | INIT_LIST_HEAD(&local->interfaces); |
92 | mutex_init(&local->iflist_mtx); | |
1010f540 | 93 | |
c5c47e67 AA |
94 | tasklet_init(&local->tasklet, |
95 | ieee802154_tasklet_handler, | |
96 | (unsigned long)local); | |
97 | ||
98 | skb_queue_head_init(&local->skb_queue); | |
99 | ||
c22ff7b4 LB |
100 | INIT_WORK(&local->tx_work, ieee802154_xmit_worker); |
101 | ||
fea3318d AA |
102 | /* init supported flags with 802.15.4 default ranges */ |
103 | phy->supported.max_minbe = 8; | |
104 | phy->supported.min_maxbe = 3; | |
105 | phy->supported.max_maxbe = 8; | |
89c7d788 | 106 | phy->supported.min_frame_retries = 0; |
fea3318d AA |
107 | phy->supported.max_frame_retries = 7; |
108 | phy->supported.max_csma_backoffs = 5; | |
109 | phy->supported.lbt = NL802154_SUPPORTED_BOOL_FALSE; | |
110 | ||
65318680 AA |
111 | /* always supported */ |
112 | phy->supported.iftypes = BIT(NL802154_IFTYPE_NODE); | |
113 | ||
a5e1ec53 | 114 | return &local->hw; |
1010f540 | 115 | } |
5a504397 | 116 | EXPORT_SYMBOL(ieee802154_alloc_hw); |
1010f540 | 117 | |
5a504397 | 118 | void ieee802154_free_hw(struct ieee802154_hw *hw) |
1010f540 | 119 | { |
60741361 | 120 | struct ieee802154_local *local = hw_to_local(hw); |
1010f540 | 121 | |
d98be45b | 122 | BUG_ON(!list_empty(&local->interfaces)); |
62610ad2 | 123 | |
d98be45b | 124 | mutex_destroy(&local->iflist_mtx); |
1e9f9545 | 125 | |
a5e1ec53 | 126 | wpan_phy_free(local->phy); |
1010f540 | 127 | } |
5a504397 | 128 | EXPORT_SYMBOL(ieee802154_free_hw); |
1010f540 | 129 | |
61f2dcba AA |
130 | static void ieee802154_setup_wpan_phy_pib(struct wpan_phy *wpan_phy) |
131 | { | |
132 | /* TODO warn on empty symbol_duration | |
133 | * Should be done when all drivers sets this value. | |
134 | */ | |
135 | ||
136 | wpan_phy->lifs_period = IEEE802154_LIFS_PERIOD * | |
137 | wpan_phy->symbol_duration; | |
138 | wpan_phy->sifs_period = IEEE802154_SIFS_PERIOD * | |
139 | wpan_phy->symbol_duration; | |
140 | } | |
141 | ||
5a504397 | 142 | int ieee802154_register_hw(struct ieee802154_hw *hw) |
1010f540 | 143 | { |
60741361 | 144 | struct ieee802154_local *local = hw_to_local(hw); |
e4962a14 | 145 | struct net_device *dev; |
640985ec AA |
146 | int rc = -ENOSYS; |
147 | ||
f7730542 | 148 | local->workqueue = |
a5e1ec53 | 149 | create_singlethread_workqueue(wpan_phy_name(local->phy)); |
f7730542 | 150 | if (!local->workqueue) { |
640985ec | 151 | rc = -ENOMEM; |
1010f540 | 152 | goto out; |
640985ec | 153 | } |
1010f540 | 154 | |
61f2dcba AA |
155 | hrtimer_init(&local->ifs_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
156 | local->ifs_timer.function = ieee802154_xmit_ifs_timer; | |
157 | ||
a5e1ec53 | 158 | wpan_phy_set_dev(local->phy, local->hw.parent); |
1010f540 | 159 | |
61f2dcba AA |
160 | ieee802154_setup_wpan_phy_pib(local->phy); |
161 | ||
fea3318d AA |
162 | if (!(hw->flags & IEEE802154_HW_CSMA_PARAMS)) { |
163 | local->phy->supported.min_csma_backoffs = 4; | |
164 | local->phy->supported.max_csma_backoffs = 4; | |
165 | local->phy->supported.min_maxbe = 5; | |
166 | local->phy->supported.max_maxbe = 5; | |
167 | local->phy->supported.min_minbe = 3; | |
168 | local->phy->supported.max_minbe = 3; | |
169 | } | |
170 | ||
171 | if (!(hw->flags & IEEE802154_HW_FRAME_RETRIES)) { | |
89c7d788 AA |
172 | local->phy->supported.min_frame_retries = 3; |
173 | local->phy->supported.max_frame_retries = 3; | |
fea3318d AA |
174 | } |
175 | ||
65318680 AA |
176 | if (hw->flags & IEEE802154_HW_PROMISCUOUS) |
177 | local->phy->supported.iftypes |= BIT(NL802154_IFTYPE_MONITOR); | |
178 | ||
a5e1ec53 | 179 | rc = wpan_phy_register(local->phy); |
1010f540 | 180 | if (rc < 0) |
181 | goto out_wq; | |
182 | ||
e4962a14 AA |
183 | rtnl_lock(); |
184 | ||
5b4a1039 VB |
185 | dev = ieee802154_if_add(local, "wpan%d", NET_NAME_ENUM, |
186 | NL802154_IFTYPE_NODE, | |
0e57547e | 187 | cpu_to_le64(0x0000000000000000ULL)); |
e4962a14 AA |
188 | if (IS_ERR(dev)) { |
189 | rtnl_unlock(); | |
190 | rc = PTR_ERR(dev); | |
2b4d413c | 191 | goto out_phy; |
e4962a14 AA |
192 | } |
193 | ||
194 | rtnl_unlock(); | |
195 | ||
1010f540 | 196 | return 0; |
197 | ||
2b4d413c AA |
198 | out_phy: |
199 | wpan_phy_unregister(local->phy); | |
1010f540 | 200 | out_wq: |
f7730542 | 201 | destroy_workqueue(local->workqueue); |
1010f540 | 202 | out: |
203 | return rc; | |
204 | } | |
5a504397 | 205 | EXPORT_SYMBOL(ieee802154_register_hw); |
1010f540 | 206 | |
5a504397 | 207 | void ieee802154_unregister_hw(struct ieee802154_hw *hw) |
1010f540 | 208 | { |
60741361 | 209 | struct ieee802154_local *local = hw_to_local(hw); |
1010f540 | 210 | |
c5c47e67 | 211 | tasklet_kill(&local->tasklet); |
f7730542 | 212 | flush_workqueue(local->workqueue); |
1010f540 | 213 | |
214 | rtnl_lock(); | |
215 | ||
592dfbfc | 216 | ieee802154_remove_interfaces(local); |
62610ad2 | 217 | |
1010f540 | 218 | rtnl_unlock(); |
219 | ||
aef00c15 | 220 | destroy_workqueue(local->workqueue); |
a5e1ec53 | 221 | wpan_phy_unregister(local->phy); |
1010f540 | 222 | } |
5a504397 | 223 | EXPORT_SYMBOL(ieee802154_unregister_hw); |
1010f540 | 224 | |
be4fd8e5 AA |
225 | static int __init ieee802154_init(void) |
226 | { | |
227 | return ieee802154_iface_init(); | |
228 | } | |
229 | ||
230 | static void __exit ieee802154_exit(void) | |
231 | { | |
232 | ieee802154_iface_exit(); | |
233 | ||
234 | rcu_barrier(); | |
235 | } | |
236 | ||
237 | subsys_initcall(ieee802154_init); | |
238 | module_exit(ieee802154_exit); | |
239 | ||
912f67ae | 240 | MODULE_DESCRIPTION("IEEE 802.15.4 subsystem"); |
1010f540 | 241 | MODULE_LICENSE("GPL v2"); |