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 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 */ 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 }; 219 220 static inline struct net *wpan_phy_net(struct wpan_phy *wpan_phy) 221 { 222 return read_pnet(&wpan_phy->_net); 223 } 224 225 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 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); 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); 401 402 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); 409 410 static inline void wpan_phy_put(struct wpan_phy *phy) 411 { 412 put_device(&phy->dev); 413 } 414 415 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