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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 <[email protected]>
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
19struct wpan_phy;
20struct wpan_phy_cca;
21struct cfg802154_scan_request;
22struct cfg802154_beacon_request;
23struct ieee802154_addr;
24
25#ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
26struct ieee802154_llsec_device_key;
27struct ieee802154_llsec_seclevel;
28struct ieee802154_llsec_params;
29struct ieee802154_llsec_device;
30struct ieee802154_llsec_table;
31struct ieee802154_llsec_key_id;
32struct ieee802154_llsec_key;
33#endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
34
35struct 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
134static inline bool
135wpan_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
151struct 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
162struct wpan_phy_cca {
163 enum nl802154_cca_modes mode;
164 enum nl802154_cca_opts opt;
165};
166
167static inline bool
168wpan_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 */
192enum 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
200struct 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
255static inline struct net *wpan_phy_net(struct wpan_phy *wpan_phy)
256{
257 return read_pnet(&wpan_phy->_net);
258}
259
260static inline void wpan_phy_net_set(struct wpan_phy *wpan_phy, struct net *net)
261{
262 write_pnet(&wpan_phy->_net, net);
263}
264
265static 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 */
286struct 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 */
304struct 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 */
321struct 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 */
340struct 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 */
361struct 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 */
375struct cfg802154_mac_pkt {
376 struct list_head node;
377 struct sk_buff *skb;
378 struct ieee802154_sub_if_data *sdata;
379 netdevice_tracker dev_tracker;
380 u8 page;
381 u8 channel;
382};
383
384struct ieee802154_llsec_key_id {
385 u8 mode;
386 u8 id;
387 union {
388 struct ieee802154_addr device_addr;
389 __le32 short_source;
390 __le64 extended_source;
391 };
392};
393
394#define IEEE802154_LLSEC_KEY_SIZE 16
395
396struct ieee802154_llsec_key {
397 u8 frame_types;
398 u32 cmd_frame_ids;
399 /* TODO replace with NL802154_KEY_SIZE */
400 u8 key[IEEE802154_LLSEC_KEY_SIZE];
401};
402
403struct ieee802154_llsec_key_entry {
404 struct list_head list;
405 struct rcu_head rcu;
406
407 struct ieee802154_llsec_key_id id;
408 struct ieee802154_llsec_key *key;
409};
410
411struct ieee802154_llsec_params {
412 bool enabled;
413
414 __be32 frame_counter;
415 u8 out_level;
416 struct ieee802154_llsec_key_id out_key;
417
418 __le64 default_key_source;
419
420 __le16 pan_id;
421 __le64 hwaddr;
422 __le64 coord_hwaddr;
423 __le16 coord_shortaddr;
424};
425
426struct ieee802154_llsec_table {
427 struct list_head keys;
428 struct list_head devices;
429 struct list_head security_levels;
430};
431
432struct ieee802154_llsec_seclevel {
433 struct list_head list;
434
435 u8 frame_type;
436 u8 cmd_frame_id;
437 bool device_override;
438 u32 sec_levels;
439};
440
441struct ieee802154_llsec_device {
442 struct list_head list;
443
444 __le16 pan_id;
445 __le16 short_addr;
446 __le64 hwaddr;
447 u32 frame_counter;
448 bool seclevel_exempt;
449
450 u8 key_mode;
451 struct list_head keys;
452};
453
454struct ieee802154_llsec_device_key {
455 struct list_head list;
456
457 struct ieee802154_llsec_key_id key_id;
458 u32 frame_counter;
459};
460
461struct wpan_dev_header_ops {
462 /* TODO create callback currently assumes ieee802154_mac_cb inside
463 * skb->cb. This should be changed to give these information as
464 * parameter.
465 */
466 int (*create)(struct sk_buff *skb, struct net_device *dev,
467 const struct ieee802154_addr *daddr,
468 const struct ieee802154_addr *saddr,
469 unsigned int len);
470};
471
472struct wpan_dev {
473 struct wpan_phy *wpan_phy;
474 int iftype;
475
476 /* the remainder of this struct should be private to cfg802154 */
477 struct list_head list;
478 struct net_device *netdev;
479
480 const struct wpan_dev_header_ops *header_ops;
481
482 /* lowpan interface, set when the wpan_dev belongs to one lowpan_dev */
483 struct net_device *lowpan_dev;
484
485 u32 identifier;
486
487 /* MAC PIB */
488 __le16 pan_id;
489 __le16 short_addr;
490 __le64 extended_addr;
491
492 /* MAC BSN field */
493 atomic_t bsn;
494 /* MAC DSN field */
495 atomic_t dsn;
496
497 u8 min_be;
498 u8 max_be;
499 u8 csma_retries;
500 s8 frame_retries;
501
502 bool lbt;
503
504 /* fallback for acknowledgment bit setting */
505 bool ackreq;
506
507 /* Associations */
508 struct mutex association_lock;
509 struct ieee802154_pan_device *parent;
510 struct list_head children;
511 unsigned int max_associations;
512 unsigned int nchildren;
513};
514
515#define to_phy(_dev) container_of(_dev, struct wpan_phy, dev)
516
517#if IS_ENABLED(CONFIG_IEEE802154) || IS_ENABLED(CONFIG_6LOWPAN)
518static inline int
519wpan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
520 const struct ieee802154_addr *daddr,
521 const struct ieee802154_addr *saddr,
522 unsigned int len)
523{
524 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
525
526 return wpan_dev->header_ops->create(skb, dev, daddr, saddr, len);
527}
528#endif
529
530struct wpan_phy *
531wpan_phy_new(const struct cfg802154_ops *ops, size_t priv_size);
532static inline void wpan_phy_set_dev(struct wpan_phy *phy, struct device *dev)
533{
534 phy->dev.parent = dev;
535}
536
537int wpan_phy_register(struct wpan_phy *phy);
538void wpan_phy_unregister(struct wpan_phy *phy);
539void wpan_phy_free(struct wpan_phy *phy);
540/* Same semantics as for class_for_each_device */
541int wpan_phy_for_each(int (*fn)(struct wpan_phy *phy, void *data), void *data);
542
543static inline void *wpan_phy_priv(struct wpan_phy *phy)
544{
545 BUG_ON(!phy);
546 return &phy->priv;
547}
548
549struct wpan_phy *wpan_phy_find(const char *str);
550
551static inline void wpan_phy_put(struct wpan_phy *phy)
552{
553 put_device(&phy->dev);
554}
555
556static inline const char *wpan_phy_name(struct wpan_phy *phy)
557{
558 return dev_name(&phy->dev);
559}
560
561void ieee802154_configure_durations(struct wpan_phy *phy,
562 unsigned int page, unsigned int channel);
563
564/**
565 * cfg802154_device_is_associated - Checks whether we are associated to any device
566 * @wpan_dev: the wpan device
567 * @return: true if we are associated
568 */
569bool cfg802154_device_is_associated(struct wpan_dev *wpan_dev);
570
571/**
572 * cfg802154_device_is_parent - Checks if a device is our coordinator
573 * @wpan_dev: the wpan device
574 * @target: the expected parent
575 * @return: true if @target is our coordinator
576 */
577bool cfg802154_device_is_parent(struct wpan_dev *wpan_dev,
578 struct ieee802154_addr *target);
579
580/**
581 * cfg802154_device_is_child - Checks whether a device is associated to us
582 * @wpan_dev: the wpan device
583 * @target: the expected child
584 * @return: the PAN device
585 */
586struct ieee802154_pan_device *
587cfg802154_device_is_child(struct wpan_dev *wpan_dev,
588 struct ieee802154_addr *target);
589
590/**
591 * cfg802154_set_max_associations - Limit the number of future associations
592 * @wpan_dev: the wpan device
593 * @max: the maximum number of devices we accept to associate
594 * @return: the old maximum value
595 */
596unsigned int cfg802154_set_max_associations(struct wpan_dev *wpan_dev,
597 unsigned int max);
598
599/**
600 * cfg802154_get_free_short_addr - Get a free address among the known devices
601 * @wpan_dev: the wpan device
602 * @return: a random short address expectedly unused on our PAN
603 */
604__le16 cfg802154_get_free_short_addr(struct wpan_dev *wpan_dev);
605
606#endif /* __NET_CFG802154_H */