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/spinlock.h>
15 #include <linux/bug.h>
16
17 #include <net/nl802154.h>
18
19 struct wpan_phy;
20 struct wpan_phy_cca;
21 struct cfg802154_scan_request;
22 struct cfg802154_beacon_request;
23 struct ieee802154_addr;
24
25 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
26 struct ieee802154_llsec_device_key;
27 struct ieee802154_llsec_seclevel;
28 struct ieee802154_llsec_params;
29 struct ieee802154_llsec_device;
30 struct ieee802154_llsec_table;
31 struct ieee802154_llsec_key_id;
32 struct ieee802154_llsec_key;
33 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
34
35 struct cfg802154_ops {
36 struct net_device * (*add_virtual_intf_deprecated)(struct wpan_phy *wpan_phy,
37 const char *name,
38 unsigned char name_assign_type,
39 int type);
40 void (*del_virtual_intf_deprecated)(struct wpan_phy *wpan_phy,
41 struct net_device *dev);
42 int (*suspend)(struct wpan_phy *wpan_phy);
43 int (*resume)(struct wpan_phy *wpan_phy);
44 int (*add_virtual_intf)(struct wpan_phy *wpan_phy,
45 const char *name,
46 unsigned char name_assign_type,
47 enum nl802154_iftype type,
48 __le64 extended_addr);
49 int (*del_virtual_intf)(struct wpan_phy *wpan_phy,
50 struct wpan_dev *wpan_dev);
51 int (*set_channel)(struct wpan_phy *wpan_phy, u8 page, u8 channel);
52 int (*set_cca_mode)(struct wpan_phy *wpan_phy,
53 const struct wpan_phy_cca *cca);
54 int (*set_cca_ed_level)(struct wpan_phy *wpan_phy, s32 ed_level);
55 int (*set_tx_power)(struct wpan_phy *wpan_phy, s32 power);
56 int (*set_pan_id)(struct wpan_phy *wpan_phy,
57 struct wpan_dev *wpan_dev, __le16 pan_id);
58 int (*set_short_addr)(struct wpan_phy *wpan_phy,
59 struct wpan_dev *wpan_dev, __le16 short_addr);
60 int (*set_backoff_exponent)(struct wpan_phy *wpan_phy,
61 struct wpan_dev *wpan_dev, u8 min_be,
62 u8 max_be);
63 int (*set_max_csma_backoffs)(struct wpan_phy *wpan_phy,
64 struct wpan_dev *wpan_dev,
65 u8 max_csma_backoffs);
66 int (*set_max_frame_retries)(struct wpan_phy *wpan_phy,
67 struct wpan_dev *wpan_dev,
68 s8 max_frame_retries);
69 int (*set_lbt_mode)(struct wpan_phy *wpan_phy,
70 struct wpan_dev *wpan_dev, bool mode);
71 int (*set_ackreq_default)(struct wpan_phy *wpan_phy,
72 struct wpan_dev *wpan_dev, bool ackreq);
73 int (*trigger_scan)(struct wpan_phy *wpan_phy,
74 struct cfg802154_scan_request *request);
75 int (*abort_scan)(struct wpan_phy *wpan_phy,
76 struct wpan_dev *wpan_dev);
77 int (*send_beacons)(struct wpan_phy *wpan_phy,
78 struct cfg802154_beacon_request *request);
79 int (*stop_beacons)(struct wpan_phy *wpan_phy,
80 struct wpan_dev *wpan_dev);
81 int (*associate)(struct wpan_phy *wpan_phy,
82 struct wpan_dev *wpan_dev,
83 struct ieee802154_addr *coord);
84 int (*disassociate)(struct wpan_phy *wpan_phy,
85 struct wpan_dev *wpan_dev,
86 struct ieee802154_addr *target);
87 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
88 void (*get_llsec_table)(struct wpan_phy *wpan_phy,
89 struct wpan_dev *wpan_dev,
90 struct ieee802154_llsec_table **table);
91 void (*lock_llsec_table)(struct wpan_phy *wpan_phy,
92 struct wpan_dev *wpan_dev);
93 void (*unlock_llsec_table)(struct wpan_phy *wpan_phy,
94 struct wpan_dev *wpan_dev);
95 /* TODO remove locking/get table callbacks, this is part of the
96 * nl802154 interface and should be accessible from ieee802154 layer.
97 */
98 int (*get_llsec_params)(struct wpan_phy *wpan_phy,
99 struct wpan_dev *wpan_dev,
100 struct ieee802154_llsec_params *params);
101 int (*set_llsec_params)(struct wpan_phy *wpan_phy,
102 struct wpan_dev *wpan_dev,
103 const struct ieee802154_llsec_params *params,
104 int changed);
105 int (*add_llsec_key)(struct wpan_phy *wpan_phy,
106 struct wpan_dev *wpan_dev,
107 const struct ieee802154_llsec_key_id *id,
108 const struct ieee802154_llsec_key *key);
109 int (*del_llsec_key)(struct wpan_phy *wpan_phy,
110 struct wpan_dev *wpan_dev,
111 const struct ieee802154_llsec_key_id *id);
112 int (*add_seclevel)(struct wpan_phy *wpan_phy,
113 struct wpan_dev *wpan_dev,
114 const struct ieee802154_llsec_seclevel *sl);
115 int (*del_seclevel)(struct wpan_phy *wpan_phy,
116 struct wpan_dev *wpan_dev,
117 const struct ieee802154_llsec_seclevel *sl);
118 int (*add_device)(struct wpan_phy *wpan_phy,
119 struct wpan_dev *wpan_dev,
120 const struct ieee802154_llsec_device *dev);
121 int (*del_device)(struct wpan_phy *wpan_phy,
122 struct wpan_dev *wpan_dev, __le64 extended_addr);
123 int (*add_devkey)(struct wpan_phy *wpan_phy,
124 struct wpan_dev *wpan_dev,
125 __le64 extended_addr,
126 const struct ieee802154_llsec_device_key *key);
127 int (*del_devkey)(struct wpan_phy *wpan_phy,
128 struct wpan_dev *wpan_dev,
129 __le64 extended_addr,
130 const struct ieee802154_llsec_device_key *key);
131 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
132 };
133
134 static inline bool
wpan_phy_supported_bool(bool b,enum nl802154_supported_bool_states st)135 wpan_phy_supported_bool(bool b, enum nl802154_supported_bool_states st)
136 {
137 switch (st) {
138 case NL802154_SUPPORTED_BOOL_TRUE:
139 return b;
140 case NL802154_SUPPORTED_BOOL_FALSE:
141 return !b;
142 case NL802154_SUPPORTED_BOOL_BOTH:
143 return true;
144 default:
145 WARN_ON(1);
146 }
147
148 return false;
149 }
150
151 struct wpan_phy_supported {
152 u32 channels[IEEE802154_MAX_PAGE + 1],
153 cca_modes, cca_opts, iftypes;
154 enum nl802154_supported_bool_states lbt;
155 u8 min_minbe, max_minbe, min_maxbe, max_maxbe,
156 min_csma_backoffs, max_csma_backoffs;
157 s8 min_frame_retries, max_frame_retries;
158 size_t tx_powers_size, cca_ed_levels_size;
159 const s32 *tx_powers, *cca_ed_levels;
160 };
161
162 struct wpan_phy_cca {
163 enum nl802154_cca_modes mode;
164 enum nl802154_cca_opts opt;
165 };
166
167 static inline bool
wpan_phy_cca_cmp(const struct wpan_phy_cca * a,const struct wpan_phy_cca * b)168 wpan_phy_cca_cmp(const struct wpan_phy_cca *a, const struct wpan_phy_cca *b)
169 {
170 if (a->mode != b->mode)
171 return false;
172
173 if (a->mode == NL802154_CCA_ENERGY_CARRIER)
174 return a->opt == b->opt;
175
176 return true;
177 }
178
179 /**
180 * enum wpan_phy_flags - WPAN PHY state flags
181 * @WPAN_PHY_FLAG_TXPOWER: Indicates that transceiver will support
182 * transmit power setting.
183 * @WPAN_PHY_FLAG_CCA_ED_LEVEL: Indicates that transceiver will support cca ed
184 * level setting.
185 * @WPAN_PHY_FLAG_CCA_MODE: Indicates that transceiver will support cca mode
186 * setting.
187 * @WPAN_PHY_FLAG_STATE_QUEUE_STOPPED: Indicates that the transmit queue was
188 * temporarily stopped.
189 * @WPAN_PHY_FLAG_DATAGRAMS_ONLY: Indicates that transceiver is only able to
190 * send/receive datagrams.
191 */
192 enum wpan_phy_flags {
193 WPAN_PHY_FLAG_TXPOWER = BIT(1),
194 WPAN_PHY_FLAG_CCA_ED_LEVEL = BIT(2),
195 WPAN_PHY_FLAG_CCA_MODE = BIT(3),
196 WPAN_PHY_FLAG_STATE_QUEUE_STOPPED = BIT(4),
197 WPAN_PHY_FLAG_DATAGRAMS_ONLY = BIT(5),
198 };
199
200 struct wpan_phy {
201 /* If multiple wpan_phys are registered and you're handed e.g.
202 * a regular netdev with assigned ieee802154_ptr, you won't
203 * know whether it points to a wpan_phy your driver has registered
204 * or not. Assign this to something global to your driver to
205 * help determine whether you own this wpan_phy or not.
206 */
207 const void *privid;
208
209 unsigned long flags;
210
211 /*
212 * This is a PIB according to 802.15.4-2011.
213 * We do not provide timing-related variables, as they
214 * aren't used outside of driver
215 */
216 u8 current_channel;
217 u8 current_page;
218 struct wpan_phy_supported supported;
219 /* current transmit_power in mBm */
220 s32 transmit_power;
221 struct wpan_phy_cca cca;
222
223 __le64 perm_extended_addr;
224
225 /* current cca ed threshold in mBm */
226 s32 cca_ed_level;
227
228 /* PHY depended MAC PIB values */
229
230 /* 802.15.4 acronym: Tdsym in nsec */
231 u32 symbol_duration;
232 /* lifs and sifs periods timing */
233 u16 lifs_period;
234 u16 sifs_period;
235
236 struct device dev;
237
238 /* the network namespace this phy lives in currently */
239 possible_net_t _net;
240
241 /* Transmission monitoring and control */
242 spinlock_t queue_lock;
243 atomic_t ongoing_txs;
244 atomic_t hold_txs;
245 wait_queue_head_t sync_txq;
246
247 /* Current filtering level on reception.
248 * Only allowed to be changed if phy is not operational.
249 */
250 enum ieee802154_filtering_level filtering;
251
252 char priv[] __aligned(NETDEV_ALIGN);
253 };
254
wpan_phy_net(struct wpan_phy * wpan_phy)255 static inline struct net *wpan_phy_net(struct wpan_phy *wpan_phy)
256 {
257 return read_pnet(&wpan_phy->_net);
258 }
259
wpan_phy_net_set(struct wpan_phy * wpan_phy,struct net * net)260 static inline void wpan_phy_net_set(struct wpan_phy *wpan_phy, struct net *net)
261 {
262 write_pnet(&wpan_phy->_net, net);
263 }
264
ieee802154_chan_is_valid(struct wpan_phy * phy,u8 page,u8 channel)265 static inline bool ieee802154_chan_is_valid(struct wpan_phy *phy,
266 u8 page, u8 channel)
267 {
268 if (page > IEEE802154_MAX_PAGE ||
269 channel > IEEE802154_MAX_CHANNEL ||
270 !(phy->supported.channels[page] & BIT(channel)))
271 return false;
272
273 return true;
274 }
275
276 /**
277 * struct ieee802154_addr - IEEE802.15.4 device address
278 * @mode: Address mode from frame header. Can be one of:
279 * - @IEEE802154_ADDR_NONE
280 * - @IEEE802154_ADDR_SHORT
281 * - @IEEE802154_ADDR_LONG
282 * @pan_id: The PAN ID this address belongs to
283 * @short_addr: address if @mode is @IEEE802154_ADDR_SHORT
284 * @extended_addr: address if @mode is @IEEE802154_ADDR_LONG
285 */
286 struct ieee802154_addr {
287 u8 mode;
288 __le16 pan_id;
289 union {
290 __le16 short_addr;
291 __le64 extended_addr;
292 };
293 };
294
295 /**
296 * struct ieee802154_coord_desc - Coordinator descriptor
297 * @addr: PAN ID and coordinator address
298 * @page: page this coordinator is using
299 * @channel: channel this coordinator is using
300 * @superframe_spec: SuperFrame specification as received
301 * @link_quality: link quality indicator at which the beacon was received
302 * @gts_permit: the coordinator accepts GTS requests
303 */
304 struct ieee802154_coord_desc {
305 struct ieee802154_addr addr;
306 u8 page;
307 u8 channel;
308 u16 superframe_spec;
309 u8 link_quality;
310 bool gts_permit;
311 };
312
313 /**
314 * struct ieee802154_pan_device - PAN device information
315 * @pan_id: the PAN ID of this device
316 * @mode: the preferred mode to reach the device
317 * @short_addr: the short address of this device
318 * @extended_addr: the extended address of this device
319 * @node: the list node
320 */
321 struct ieee802154_pan_device {
322 __le16 pan_id;
323 u8 mode;
324 __le16 short_addr;
325 __le64 extended_addr;
326 struct list_head node;
327 };
328
329 /**
330 * struct cfg802154_scan_request - Scan request
331 *
332 * @type: type of scan to be performed
333 * @page: page on which to perform the scan
334 * @channels: channels in te %page to be scanned
335 * @duration: time spent on each channel, calculated with:
336 * aBaseSuperframeDuration * (2 ^ duration + 1)
337 * @wpan_dev: the wpan device on which to perform the scan
338 * @wpan_phy: the wpan phy on which to perform the scan
339 */
340 struct cfg802154_scan_request {
341 enum nl802154_scan_types type;
342 u8 page;
343 u32 channels;
344 u8 duration;
345 struct wpan_dev *wpan_dev;
346 struct wpan_phy *wpan_phy;
347 };
348
349 /**
350 * struct cfg802154_beacon_request - Beacon request descriptor
351 *
352 * @interval: interval n between sendings, in multiple order of the super frame
353 * duration: aBaseSuperframeDuration * (2^n) unless the interval
354 * order is greater or equal to 15, in this case beacons won't be
355 * passively sent out at a fixed rate but instead inform the device
356 * that it should answer beacon requests as part of active scan
357 * procedures
358 * @wpan_dev: the concerned wpan device
359 * @wpan_phy: the wpan phy this was for
360 */
361 struct cfg802154_beacon_request {
362 u8 interval;
363 struct wpan_dev *wpan_dev;
364 struct wpan_phy *wpan_phy;
365 };
366
367 /**
368 * struct cfg802154_mac_pkt - MAC packet descriptor (beacon/command)
369 * @node: MAC packets to process list member
370 * @skb: the received sk_buff
371 * @sdata: the interface on which @skb was received
372 * @page: page configuration when @skb was received
373 * @channel: channel configuration when @skb was received
374 */
375 struct cfg802154_mac_pkt {
376 struct list_head node;
377 struct sk_buff *skb;
378 struct ieee802154_sub_if_data *sdata;
379 u8 page;
380 u8 channel;
381 };
382
383 struct ieee802154_llsec_key_id {
384 u8 mode;
385 u8 id;
386 union {
387 struct ieee802154_addr device_addr;
388 __le32 short_source;
389 __le64 extended_source;
390 };
391 };
392
393 #define IEEE802154_LLSEC_KEY_SIZE 16
394
395 struct ieee802154_llsec_key {
396 u8 frame_types;
397 u32 cmd_frame_ids;
398 /* TODO replace with NL802154_KEY_SIZE */
399 u8 key[IEEE802154_LLSEC_KEY_SIZE];
400 };
401
402 struct ieee802154_llsec_key_entry {
403 struct list_head list;
404 struct rcu_head rcu;
405
406 struct ieee802154_llsec_key_id id;
407 struct ieee802154_llsec_key *key;
408 };
409
410 struct ieee802154_llsec_params {
411 bool enabled;
412
413 __be32 frame_counter;
414 u8 out_level;
415 struct ieee802154_llsec_key_id out_key;
416
417 __le64 default_key_source;
418
419 __le16 pan_id;
420 __le64 hwaddr;
421 __le64 coord_hwaddr;
422 __le16 coord_shortaddr;
423 };
424
425 struct ieee802154_llsec_table {
426 struct list_head keys;
427 struct list_head devices;
428 struct list_head security_levels;
429 };
430
431 struct ieee802154_llsec_seclevel {
432 struct list_head list;
433
434 u8 frame_type;
435 u8 cmd_frame_id;
436 bool device_override;
437 u32 sec_levels;
438 };
439
440 struct ieee802154_llsec_device {
441 struct list_head list;
442
443 __le16 pan_id;
444 __le16 short_addr;
445 __le64 hwaddr;
446 u32 frame_counter;
447 bool seclevel_exempt;
448
449 u8 key_mode;
450 struct list_head keys;
451 };
452
453 struct ieee802154_llsec_device_key {
454 struct list_head list;
455
456 struct ieee802154_llsec_key_id key_id;
457 u32 frame_counter;
458 };
459
460 struct wpan_dev_header_ops {
461 /* TODO create callback currently assumes ieee802154_mac_cb inside
462 * skb->cb. This should be changed to give these information as
463 * parameter.
464 */
465 int (*create)(struct sk_buff *skb, struct net_device *dev,
466 const struct ieee802154_addr *daddr,
467 const struct ieee802154_addr *saddr,
468 unsigned int len);
469 };
470
471 struct wpan_dev {
472 struct wpan_phy *wpan_phy;
473 int iftype;
474
475 /* the remainder of this struct should be private to cfg802154 */
476 struct list_head list;
477 struct net_device *netdev;
478
479 const struct wpan_dev_header_ops *header_ops;
480
481 /* lowpan interface, set when the wpan_dev belongs to one lowpan_dev */
482 struct net_device *lowpan_dev;
483
484 u32 identifier;
485
486 /* MAC PIB */
487 __le16 pan_id;
488 __le16 short_addr;
489 __le64 extended_addr;
490
491 /* MAC BSN field */
492 atomic_t bsn;
493 /* MAC DSN field */
494 atomic_t dsn;
495
496 u8 min_be;
497 u8 max_be;
498 u8 csma_retries;
499 s8 frame_retries;
500
501 bool lbt;
502
503 /* fallback for acknowledgment bit setting */
504 bool ackreq;
505
506 /* Associations */
507 struct mutex association_lock;
508 struct ieee802154_pan_device *parent;
509 struct list_head children;
510 unsigned int max_associations;
511 unsigned int nchildren;
512 };
513
514 #define to_phy(_dev) container_of(_dev, struct wpan_phy, dev)
515
516 #if IS_ENABLED(CONFIG_IEEE802154) || IS_ENABLED(CONFIG_6LOWPAN)
517 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)518 wpan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
519 const struct ieee802154_addr *daddr,
520 const struct ieee802154_addr *saddr,
521 unsigned int len)
522 {
523 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
524
525 return wpan_dev->header_ops->create(skb, dev, daddr, saddr, len);
526 }
527 #endif
528
529 struct wpan_phy *
530 wpan_phy_new(const struct cfg802154_ops *ops, size_t priv_size);
wpan_phy_set_dev(struct wpan_phy * phy,struct device * dev)531 static inline void wpan_phy_set_dev(struct wpan_phy *phy, struct device *dev)
532 {
533 phy->dev.parent = dev;
534 }
535
536 int wpan_phy_register(struct wpan_phy *phy);
537 void wpan_phy_unregister(struct wpan_phy *phy);
538 void wpan_phy_free(struct wpan_phy *phy);
539 /* Same semantics as for class_for_each_device */
540 int wpan_phy_for_each(int (*fn)(struct wpan_phy *phy, void *data), void *data);
541
wpan_phy_priv(struct wpan_phy * phy)542 static inline void *wpan_phy_priv(struct wpan_phy *phy)
543 {
544 BUG_ON(!phy);
545 return &phy->priv;
546 }
547
548 struct wpan_phy *wpan_phy_find(const char *str);
549
wpan_phy_put(struct wpan_phy * phy)550 static inline void wpan_phy_put(struct wpan_phy *phy)
551 {
552 put_device(&phy->dev);
553 }
554
wpan_phy_name(struct wpan_phy * phy)555 static inline const char *wpan_phy_name(struct wpan_phy *phy)
556 {
557 return dev_name(&phy->dev);
558 }
559
560 void ieee802154_configure_durations(struct wpan_phy *phy,
561 unsigned int page, unsigned int channel);
562
563 /**
564 * cfg802154_device_is_associated - Checks whether we are associated to any device
565 * @wpan_dev: the wpan device
566 * @return: true if we are associated
567 */
568 bool cfg802154_device_is_associated(struct wpan_dev *wpan_dev);
569
570 /**
571 * cfg802154_device_is_parent - Checks if a device is our coordinator
572 * @wpan_dev: the wpan device
573 * @target: the expected parent
574 * @return: true if @target is our coordinator
575 */
576 bool cfg802154_device_is_parent(struct wpan_dev *wpan_dev,
577 struct ieee802154_addr *target);
578
579 /**
580 * cfg802154_device_is_child - Checks whether a device is associated to us
581 * @wpan_dev: the wpan device
582 * @target: the expected child
583 * @return: the PAN device
584 */
585 struct ieee802154_pan_device *
586 cfg802154_device_is_child(struct wpan_dev *wpan_dev,
587 struct ieee802154_addr *target);
588
589 /**
590 * cfg802154_set_max_associations - Limit the number of future associations
591 * @wpan_dev: the wpan device
592 * @max: the maximum number of devices we accept to associate
593 * @return: the old maximum value
594 */
595 unsigned int cfg802154_set_max_associations(struct wpan_dev *wpan_dev,
596 unsigned int max);
597
598 /**
599 * cfg802154_get_free_short_addr - Get a free address among the known devices
600 * @wpan_dev: the wpan device
601 * @return: a random short address expectedly unused on our PAN
602 */
603 __le16 cfg802154_get_free_short_addr(struct wpan_dev *wpan_dev);
604
605 #endif /* __NET_CFG802154_H */
606