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