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 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 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 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 * @WPAN_PHY_FLAG_STATE_QUEUE_STOPPED: Indicates that the transmit queue was 170 * temporarily stopped. 171 */ 172 enum wpan_phy_flags { 173 WPAN_PHY_FLAG_TXPOWER = BIT(1), 174 WPAN_PHY_FLAG_CCA_ED_LEVEL = BIT(2), 175 WPAN_PHY_FLAG_CCA_MODE = BIT(3), 176 WPAN_PHY_FLAG_STATE_QUEUE_STOPPED = BIT(4), 177 }; 178 179 struct wpan_phy { 180 /* If multiple wpan_phys are registered and you're handed e.g. 181 * a regular netdev with assigned ieee802154_ptr, you won't 182 * know whether it points to a wpan_phy your driver has registered 183 * or not. Assign this to something global to your driver to 184 * help determine whether you own this wpan_phy or not. 185 */ 186 const void *privid; 187 188 unsigned long flags; 189 190 /* 191 * This is a PIB according to 802.15.4-2011. 192 * We do not provide timing-related variables, as they 193 * aren't used outside of driver 194 */ 195 u8 current_channel; 196 u8 current_page; 197 struct wpan_phy_supported supported; 198 /* current transmit_power in mBm */ 199 s32 transmit_power; 200 struct wpan_phy_cca cca; 201 202 __le64 perm_extended_addr; 203 204 /* current cca ed threshold in mBm */ 205 s32 cca_ed_level; 206 207 /* PHY depended MAC PIB values */ 208 209 /* 802.15.4 acronym: Tdsym in nsec */ 210 u32 symbol_duration; 211 /* lifs and sifs periods timing */ 212 u16 lifs_period; 213 u16 sifs_period; 214 215 struct device dev; 216 217 /* the network namespace this phy lives in currently */ 218 possible_net_t _net; 219 220 /* Transmission monitoring and control */ 221 spinlock_t queue_lock; 222 atomic_t ongoing_txs; 223 atomic_t hold_txs; 224 wait_queue_head_t sync_txq; 225 226 /* Current filtering level on reception. 227 * Only allowed to be changed if phy is not operational. 228 */ 229 enum ieee802154_filtering_level filtering; 230 231 char priv[] __aligned(NETDEV_ALIGN); 232 }; 233 234 static inline struct net *wpan_phy_net(struct wpan_phy *wpan_phy) 235 { 236 return read_pnet(&wpan_phy->_net); 237 } 238 239 static inline void wpan_phy_net_set(struct wpan_phy *wpan_phy, struct net *net) 240 { 241 write_pnet(&wpan_phy->_net, net); 242 } 243 244 /** 245 * struct ieee802154_addr - IEEE802.15.4 device address 246 * @mode: Address mode from frame header. Can be one of: 247 * - @IEEE802154_ADDR_NONE 248 * - @IEEE802154_ADDR_SHORT 249 * - @IEEE802154_ADDR_LONG 250 * @pan_id: The PAN ID this address belongs to 251 * @short_addr: address if @mode is @IEEE802154_ADDR_SHORT 252 * @extended_addr: address if @mode is @IEEE802154_ADDR_LONG 253 */ 254 struct ieee802154_addr { 255 u8 mode; 256 __le16 pan_id; 257 union { 258 __le16 short_addr; 259 __le64 extended_addr; 260 }; 261 }; 262 263 struct ieee802154_llsec_key_id { 264 u8 mode; 265 u8 id; 266 union { 267 struct ieee802154_addr device_addr; 268 __le32 short_source; 269 __le64 extended_source; 270 }; 271 }; 272 273 #define IEEE802154_LLSEC_KEY_SIZE 16 274 275 struct ieee802154_llsec_key { 276 u8 frame_types; 277 u32 cmd_frame_ids; 278 /* TODO replace with NL802154_KEY_SIZE */ 279 u8 key[IEEE802154_LLSEC_KEY_SIZE]; 280 }; 281 282 struct ieee802154_llsec_key_entry { 283 struct list_head list; 284 285 struct ieee802154_llsec_key_id id; 286 struct ieee802154_llsec_key *key; 287 }; 288 289 struct ieee802154_llsec_params { 290 bool enabled; 291 292 __be32 frame_counter; 293 u8 out_level; 294 struct ieee802154_llsec_key_id out_key; 295 296 __le64 default_key_source; 297 298 __le16 pan_id; 299 __le64 hwaddr; 300 __le64 coord_hwaddr; 301 __le16 coord_shortaddr; 302 }; 303 304 struct ieee802154_llsec_table { 305 struct list_head keys; 306 struct list_head devices; 307 struct list_head security_levels; 308 }; 309 310 struct ieee802154_llsec_seclevel { 311 struct list_head list; 312 313 u8 frame_type; 314 u8 cmd_frame_id; 315 bool device_override; 316 u32 sec_levels; 317 }; 318 319 struct ieee802154_llsec_device { 320 struct list_head list; 321 322 __le16 pan_id; 323 __le16 short_addr; 324 __le64 hwaddr; 325 u32 frame_counter; 326 bool seclevel_exempt; 327 328 u8 key_mode; 329 struct list_head keys; 330 }; 331 332 struct ieee802154_llsec_device_key { 333 struct list_head list; 334 335 struct ieee802154_llsec_key_id key_id; 336 u32 frame_counter; 337 }; 338 339 struct wpan_dev_header_ops { 340 /* TODO create callback currently assumes ieee802154_mac_cb inside 341 * skb->cb. This should be changed to give these information as 342 * parameter. 343 */ 344 int (*create)(struct sk_buff *skb, struct net_device *dev, 345 const struct ieee802154_addr *daddr, 346 const struct ieee802154_addr *saddr, 347 unsigned int len); 348 }; 349 350 struct wpan_dev { 351 struct wpan_phy *wpan_phy; 352 int iftype; 353 354 /* the remainder of this struct should be private to cfg802154 */ 355 struct list_head list; 356 struct net_device *netdev; 357 358 const struct wpan_dev_header_ops *header_ops; 359 360 /* lowpan interface, set when the wpan_dev belongs to one lowpan_dev */ 361 struct net_device *lowpan_dev; 362 363 u32 identifier; 364 365 /* MAC PIB */ 366 __le16 pan_id; 367 __le16 short_addr; 368 __le64 extended_addr; 369 370 /* MAC BSN field */ 371 atomic_t bsn; 372 /* MAC DSN field */ 373 atomic_t dsn; 374 375 u8 min_be; 376 u8 max_be; 377 u8 csma_retries; 378 s8 frame_retries; 379 380 bool lbt; 381 382 /* fallback for acknowledgment bit setting */ 383 bool ackreq; 384 }; 385 386 #define to_phy(_dev) container_of(_dev, struct wpan_phy, dev) 387 388 #if IS_ENABLED(CONFIG_IEEE802154) || IS_ENABLED(CONFIG_6LOWPAN) 389 static inline int 390 wpan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, 391 const struct ieee802154_addr *daddr, 392 const struct ieee802154_addr *saddr, 393 unsigned int len) 394 { 395 struct wpan_dev *wpan_dev = dev->ieee802154_ptr; 396 397 return wpan_dev->header_ops->create(skb, dev, daddr, saddr, len); 398 } 399 #endif 400 401 struct wpan_phy * 402 wpan_phy_new(const struct cfg802154_ops *ops, size_t priv_size); 403 static inline void wpan_phy_set_dev(struct wpan_phy *phy, struct device *dev) 404 { 405 phy->dev.parent = dev; 406 } 407 408 int wpan_phy_register(struct wpan_phy *phy); 409 void wpan_phy_unregister(struct wpan_phy *phy); 410 void wpan_phy_free(struct wpan_phy *phy); 411 /* Same semantics as for class_for_each_device */ 412 int wpan_phy_for_each(int (*fn)(struct wpan_phy *phy, void *data), void *data); 413 414 static inline void *wpan_phy_priv(struct wpan_phy *phy) 415 { 416 BUG_ON(!phy); 417 return &phy->priv; 418 } 419 420 struct wpan_phy *wpan_phy_find(const char *str); 421 422 static inline void wpan_phy_put(struct wpan_phy *phy) 423 { 424 put_device(&phy->dev); 425 } 426 427 static inline const char *wpan_phy_name(struct wpan_phy *phy) 428 { 429 return dev_name(&phy->dev); 430 } 431 432 void ieee802154_configure_durations(struct wpan_phy *phy); 433 434 #endif /* __NET_CFG802154_H */ 435