1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (C) 2007, 2008, 2009 Siemens AG
4 *
5 * Written by:
6 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
7 */
8
9 #ifndef __NET_CFG802154_H
10 #define __NET_CFG802154_H
11
12 #include <linux/ieee802154.h>
13 #include <linux/netdevice.h>
14 #include <linux/mutex.h>
15 #include <linux/bug.h>
16
17 #include <net/nl802154.h>
18
19 struct wpan_phy;
20 struct wpan_phy_cca;
21
22 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
23 struct ieee802154_llsec_device_key;
24 struct ieee802154_llsec_seclevel;
25 struct ieee802154_llsec_params;
26 struct ieee802154_llsec_device;
27 struct ieee802154_llsec_table;
28 struct ieee802154_llsec_key_id;
29 struct ieee802154_llsec_key;
30 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
31
32 struct cfg802154_ops {
33 struct net_device * (*add_virtual_intf_deprecated)(struct wpan_phy *wpan_phy,
34 const char *name,
35 unsigned char name_assign_type,
36 int type);
37 void (*del_virtual_intf_deprecated)(struct wpan_phy *wpan_phy,
38 struct net_device *dev);
39 int (*suspend)(struct wpan_phy *wpan_phy);
40 int (*resume)(struct wpan_phy *wpan_phy);
41 int (*add_virtual_intf)(struct wpan_phy *wpan_phy,
42 const char *name,
43 unsigned char name_assign_type,
44 enum nl802154_iftype type,
45 __le64 extended_addr);
46 int (*del_virtual_intf)(struct wpan_phy *wpan_phy,
47 struct wpan_dev *wpan_dev);
48 int (*set_channel)(struct wpan_phy *wpan_phy, u8 page, u8 channel);
49 int (*set_cca_mode)(struct wpan_phy *wpan_phy,
50 const struct wpan_phy_cca *cca);
51 int (*set_cca_ed_level)(struct wpan_phy *wpan_phy, s32 ed_level);
52 int (*set_tx_power)(struct wpan_phy *wpan_phy, s32 power);
53 int (*set_pan_id)(struct wpan_phy *wpan_phy,
54 struct wpan_dev *wpan_dev, __le16 pan_id);
55 int (*set_short_addr)(struct wpan_phy *wpan_phy,
56 struct wpan_dev *wpan_dev, __le16 short_addr);
57 int (*set_backoff_exponent)(struct wpan_phy *wpan_phy,
58 struct wpan_dev *wpan_dev, u8 min_be,
59 u8 max_be);
60 int (*set_max_csma_backoffs)(struct wpan_phy *wpan_phy,
61 struct wpan_dev *wpan_dev,
62 u8 max_csma_backoffs);
63 int (*set_max_frame_retries)(struct wpan_phy *wpan_phy,
64 struct wpan_dev *wpan_dev,
65 s8 max_frame_retries);
66 int (*set_lbt_mode)(struct wpan_phy *wpan_phy,
67 struct wpan_dev *wpan_dev, bool mode);
68 int (*set_ackreq_default)(struct wpan_phy *wpan_phy,
69 struct wpan_dev *wpan_dev, bool ackreq);
70 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
71 void (*get_llsec_table)(struct wpan_phy *wpan_phy,
72 struct wpan_dev *wpan_dev,
73 struct ieee802154_llsec_table **table);
74 void (*lock_llsec_table)(struct wpan_phy *wpan_phy,
75 struct wpan_dev *wpan_dev);
76 void (*unlock_llsec_table)(struct wpan_phy *wpan_phy,
77 struct wpan_dev *wpan_dev);
78 /* TODO remove locking/get table callbacks, this is part of the
79 * nl802154 interface and should be accessible from ieee802154 layer.
80 */
81 int (*get_llsec_params)(struct wpan_phy *wpan_phy,
82 struct wpan_dev *wpan_dev,
83 struct ieee802154_llsec_params *params);
84 int (*set_llsec_params)(struct wpan_phy *wpan_phy,
85 struct wpan_dev *wpan_dev,
86 const struct ieee802154_llsec_params *params,
87 int changed);
88 int (*add_llsec_key)(struct wpan_phy *wpan_phy,
89 struct wpan_dev *wpan_dev,
90 const struct ieee802154_llsec_key_id *id,
91 const struct ieee802154_llsec_key *key);
92 int (*del_llsec_key)(struct wpan_phy *wpan_phy,
93 struct wpan_dev *wpan_dev,
94 const struct ieee802154_llsec_key_id *id);
95 int (*add_seclevel)(struct wpan_phy *wpan_phy,
96 struct wpan_dev *wpan_dev,
97 const struct ieee802154_llsec_seclevel *sl);
98 int (*del_seclevel)(struct wpan_phy *wpan_phy,
99 struct wpan_dev *wpan_dev,
100 const struct ieee802154_llsec_seclevel *sl);
101 int (*add_device)(struct wpan_phy *wpan_phy,
102 struct wpan_dev *wpan_dev,
103 const struct ieee802154_llsec_device *dev);
104 int (*del_device)(struct wpan_phy *wpan_phy,
105 struct wpan_dev *wpan_dev, __le64 extended_addr);
106 int (*add_devkey)(struct wpan_phy *wpan_phy,
107 struct wpan_dev *wpan_dev,
108 __le64 extended_addr,
109 const struct ieee802154_llsec_device_key *key);
110 int (*del_devkey)(struct wpan_phy *wpan_phy,
111 struct wpan_dev *wpan_dev,
112 __le64 extended_addr,
113 const struct ieee802154_llsec_device_key *key);
114 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
115 };
116
117 static inline bool
wpan_phy_supported_bool(bool b,enum nl802154_supported_bool_states st)118 wpan_phy_supported_bool(bool b, enum nl802154_supported_bool_states st)
119 {
120 switch (st) {
121 case NL802154_SUPPORTED_BOOL_TRUE:
122 return b;
123 case NL802154_SUPPORTED_BOOL_FALSE:
124 return !b;
125 case NL802154_SUPPORTED_BOOL_BOTH:
126 return true;
127 default:
128 WARN_ON(1);
129 }
130
131 return false;
132 }
133
134 struct wpan_phy_supported {
135 u32 channels[IEEE802154_MAX_PAGE + 1],
136 cca_modes, cca_opts, iftypes;
137 enum nl802154_supported_bool_states lbt;
138 u8 min_minbe, max_minbe, min_maxbe, max_maxbe,
139 min_csma_backoffs, max_csma_backoffs;
140 s8 min_frame_retries, max_frame_retries;
141 size_t tx_powers_size, cca_ed_levels_size;
142 const s32 *tx_powers, *cca_ed_levels;
143 };
144
145 struct wpan_phy_cca {
146 enum nl802154_cca_modes mode;
147 enum nl802154_cca_opts opt;
148 };
149
150 static inline bool
wpan_phy_cca_cmp(const struct wpan_phy_cca * a,const struct wpan_phy_cca * b)151 wpan_phy_cca_cmp(const struct wpan_phy_cca *a, const struct wpan_phy_cca *b)
152 {
153 if (a->mode != b->mode)
154 return false;
155
156 if (a->mode == NL802154_CCA_ENERGY_CARRIER)
157 return a->opt == b->opt;
158
159 return true;
160 }
161
162 /**
163 * @WPAN_PHY_FLAG_TRANSMIT_POWER: Indicates that transceiver will support
164 * transmit power setting.
165 * @WPAN_PHY_FLAG_CCA_ED_LEVEL: Indicates that transceiver will support cca ed
166 * level setting.
167 * @WPAN_PHY_FLAG_CCA_MODE: Indicates that transceiver will support cca mode
168 * setting.
169 */
170 enum wpan_phy_flags {
171 WPAN_PHY_FLAG_TXPOWER = BIT(1),
172 WPAN_PHY_FLAG_CCA_ED_LEVEL = BIT(2),
173 WPAN_PHY_FLAG_CCA_MODE = BIT(3),
174 };
175
176 struct wpan_phy {
177 /* If multiple wpan_phys are registered and you're handed e.g.
178 * a regular netdev with assigned ieee802154_ptr, you won't
179 * know whether it points to a wpan_phy your driver has registered
180 * or not. Assign this to something global to your driver to
181 * help determine whether you own this wpan_phy or not.
182 */
183 const void *privid;
184
185 u32 flags;
186
187 /*
188 * This is a PIB according to 802.15.4-2011.
189 * We do not provide timing-related variables, as they
190 * aren't used outside of driver
191 */
192 u8 current_channel;
193 u8 current_page;
194 struct wpan_phy_supported supported;
195 /* current transmit_power in mBm */
196 s32 transmit_power;
197 struct wpan_phy_cca cca;
198
199 __le64 perm_extended_addr;
200
201 /* current cca ed threshold in mBm */
202 s32 cca_ed_level;
203
204 /* PHY depended MAC PIB values */
205
206 /* 802.15.4 acronym: Tdsym in nsec */
207 u32 symbol_duration;
208 /* lifs and sifs periods timing */
209 u16 lifs_period;
210 u16 sifs_period;
211
212 struct device dev;
213
214 /* the network namespace this phy lives in currently */
215 possible_net_t _net;
216
217 char priv[] __aligned(NETDEV_ALIGN);
218 };
219
wpan_phy_net(struct wpan_phy * wpan_phy)220 static inline struct net *wpan_phy_net(struct wpan_phy *wpan_phy)
221 {
222 return read_pnet(&wpan_phy->_net);
223 }
224
wpan_phy_net_set(struct wpan_phy * wpan_phy,struct net * net)225 static inline void wpan_phy_net_set(struct wpan_phy *wpan_phy, struct net *net)
226 {
227 write_pnet(&wpan_phy->_net, net);
228 }
229
230 /**
231 * struct ieee802154_addr - IEEE802.15.4 device address
232 * @mode: Address mode from frame header. Can be one of:
233 * - @IEEE802154_ADDR_NONE
234 * - @IEEE802154_ADDR_SHORT
235 * - @IEEE802154_ADDR_LONG
236 * @pan_id: The PAN ID this address belongs to
237 * @short_addr: address if @mode is @IEEE802154_ADDR_SHORT
238 * @extended_addr: address if @mode is @IEEE802154_ADDR_LONG
239 */
240 struct ieee802154_addr {
241 u8 mode;
242 __le16 pan_id;
243 union {
244 __le16 short_addr;
245 __le64 extended_addr;
246 };
247 };
248
249 struct ieee802154_llsec_key_id {
250 u8 mode;
251 u8 id;
252 union {
253 struct ieee802154_addr device_addr;
254 __le32 short_source;
255 __le64 extended_source;
256 };
257 };
258
259 #define IEEE802154_LLSEC_KEY_SIZE 16
260
261 struct ieee802154_llsec_key {
262 u8 frame_types;
263 u32 cmd_frame_ids;
264 /* TODO replace with NL802154_KEY_SIZE */
265 u8 key[IEEE802154_LLSEC_KEY_SIZE];
266 };
267
268 struct ieee802154_llsec_key_entry {
269 struct list_head list;
270
271 struct ieee802154_llsec_key_id id;
272 struct ieee802154_llsec_key *key;
273 };
274
275 struct ieee802154_llsec_params {
276 bool enabled;
277
278 __be32 frame_counter;
279 u8 out_level;
280 struct ieee802154_llsec_key_id out_key;
281
282 __le64 default_key_source;
283
284 __le16 pan_id;
285 __le64 hwaddr;
286 __le64 coord_hwaddr;
287 __le16 coord_shortaddr;
288 };
289
290 struct ieee802154_llsec_table {
291 struct list_head keys;
292 struct list_head devices;
293 struct list_head security_levels;
294 };
295
296 struct ieee802154_llsec_seclevel {
297 struct list_head list;
298
299 u8 frame_type;
300 u8 cmd_frame_id;
301 bool device_override;
302 u32 sec_levels;
303 };
304
305 struct ieee802154_llsec_device {
306 struct list_head list;
307
308 __le16 pan_id;
309 __le16 short_addr;
310 __le64 hwaddr;
311 u32 frame_counter;
312 bool seclevel_exempt;
313
314 u8 key_mode;
315 struct list_head keys;
316 };
317
318 struct ieee802154_llsec_device_key {
319 struct list_head list;
320
321 struct ieee802154_llsec_key_id key_id;
322 u32 frame_counter;
323 };
324
325 struct wpan_dev_header_ops {
326 /* TODO create callback currently assumes ieee802154_mac_cb inside
327 * skb->cb. This should be changed to give these information as
328 * parameter.
329 */
330 int (*create)(struct sk_buff *skb, struct net_device *dev,
331 const struct ieee802154_addr *daddr,
332 const struct ieee802154_addr *saddr,
333 unsigned int len);
334 };
335
336 struct wpan_dev {
337 struct wpan_phy *wpan_phy;
338 int iftype;
339
340 /* the remainder of this struct should be private to cfg802154 */
341 struct list_head list;
342 struct net_device *netdev;
343
344 const struct wpan_dev_header_ops *header_ops;
345
346 /* lowpan interface, set when the wpan_dev belongs to one lowpan_dev */
347 struct net_device *lowpan_dev;
348
349 u32 identifier;
350
351 /* MAC PIB */
352 __le16 pan_id;
353 __le16 short_addr;
354 __le64 extended_addr;
355
356 /* MAC BSN field */
357 atomic_t bsn;
358 /* MAC DSN field */
359 atomic_t dsn;
360
361 u8 min_be;
362 u8 max_be;
363 u8 csma_retries;
364 s8 frame_retries;
365
366 bool lbt;
367
368 bool promiscuous_mode;
369
370 /* fallback for acknowledgment bit setting */
371 bool ackreq;
372 };
373
374 #define to_phy(_dev) container_of(_dev, struct wpan_phy, dev)
375
376 #if IS_ENABLED(CONFIG_IEEE802154) || IS_ENABLED(CONFIG_6LOWPAN)
377 static inline int
wpan_dev_hard_header(struct sk_buff * skb,struct net_device * dev,const struct ieee802154_addr * daddr,const struct ieee802154_addr * saddr,unsigned int len)378 wpan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
379 const struct ieee802154_addr *daddr,
380 const struct ieee802154_addr *saddr,
381 unsigned int len)
382 {
383 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
384
385 return wpan_dev->header_ops->create(skb, dev, daddr, saddr, len);
386 }
387 #endif
388
389 struct wpan_phy *
390 wpan_phy_new(const struct cfg802154_ops *ops, size_t priv_size);
wpan_phy_set_dev(struct wpan_phy * phy,struct device * dev)391 static inline void wpan_phy_set_dev(struct wpan_phy *phy, struct device *dev)
392 {
393 phy->dev.parent = dev;
394 }
395
396 int wpan_phy_register(struct wpan_phy *phy);
397 void wpan_phy_unregister(struct wpan_phy *phy);
398 void wpan_phy_free(struct wpan_phy *phy);
399 /* Same semantics as for class_for_each_device */
400 int wpan_phy_for_each(int (*fn)(struct wpan_phy *phy, void *data), void *data);
401
wpan_phy_priv(struct wpan_phy * phy)402 static inline void *wpan_phy_priv(struct wpan_phy *phy)
403 {
404 BUG_ON(!phy);
405 return &phy->priv;
406 }
407
408 struct wpan_phy *wpan_phy_find(const char *str);
409
wpan_phy_put(struct wpan_phy * phy)410 static inline void wpan_phy_put(struct wpan_phy *phy)
411 {
412 put_device(&phy->dev);
413 }
414
wpan_phy_name(struct wpan_phy * phy)415 static inline const char *wpan_phy_name(struct wpan_phy *phy)
416 {
417 return dev_name(&phy->dev);
418 }
419
420 void ieee802154_configure_durations(struct wpan_phy *phy);
421
422 #endif /* __NET_CFG802154_H */
423