include/net/cfg802154.h

   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 usec */
 207         u8 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 struct ieee802154_addr {
 231         u8 mode;
 232         __le16 pan_id;
 233         union {
 234                 __le16 short_addr;
 235                 __le64 extended_addr;
 236         };
 237 };
 238
 239 struct ieee802154_llsec_key_id {
 240         u8 mode;
 241         u8 id;
 242         union {
 243                 struct ieee802154_addr device_addr;
 244                 __le32 short_source;
 245                 __le64 extended_source;
 246         };
 247 };
 248
 249 #define IEEE802154_LLSEC_KEY_SIZE 16
 250
 251 struct ieee802154_llsec_key {
 252         u8 frame_types;
 253         u32 cmd_frame_ids;
 254         /* TODO replace with NL802154_KEY_SIZE */
 255         u8 key[IEEE802154_LLSEC_KEY_SIZE];
 256 };
 257
 258 struct ieee802154_llsec_key_entry {
 259         struct list_head list;
 260         struct rcu_head rcu;
 261
 262         struct ieee802154_llsec_key_id id;
 263         struct ieee802154_llsec_key *key;
 264 };
 265
 266 struct ieee802154_llsec_params {
 267         bool enabled;
 268
 269         __be32 frame_counter;
 270         u8 out_level;
 271         struct ieee802154_llsec_key_id out_key;
 272
 273         __le64 default_key_source;
 274
 275         __le16 pan_id;
 276         __le64 hwaddr;
 277         __le64 coord_hwaddr;
 278         __le16 coord_shortaddr;
 279 };
 280
 281 struct ieee802154_llsec_table {
 282         struct list_head keys;
 283         struct list_head devices;
 284         struct list_head security_levels;
 285 };
 286
 287 struct ieee802154_llsec_seclevel {
 288         struct list_head list;
 289
 290         u8 frame_type;
 291         u8 cmd_frame_id;
 292         bool device_override;
 293         u32 sec_levels;
 294 };
 295
 296 struct ieee802154_llsec_device {
 297         struct list_head list;
 298
 299         __le16 pan_id;
 300         __le16 short_addr;
 301         __le64 hwaddr;
 302         u32 frame_counter;
 303         bool seclevel_exempt;
 304
 305         u8 key_mode;
 306         struct list_head keys;
 307 };
 308
 309 struct ieee802154_llsec_device_key {
 310         struct list_head list;
 311
 312         struct ieee802154_llsec_key_id key_id;
 313         u32 frame_counter;
 314 };
 315
 316 struct wpan_dev_header_ops {
 317         /* TODO create callback currently assumes ieee802154_mac_cb inside
 318          * skb->cb. This should be changed to give these information as
 319          * parameter.
 320          */
 321         int     (*create)(struct sk_buff *skb, struct net_device *dev,
 322                           const struct ieee802154_addr *daddr,
 323                           const struct ieee802154_addr *saddr,
 324                           unsigned int len);
 325 };
 326
 327 struct wpan_dev {
 328         struct wpan_phy *wpan_phy;
 329         int iftype;
 330
 331         /* the remainder of this struct should be private to cfg802154 */
 332         struct list_head list;
 333         struct net_device *netdev;
 334
 335         const struct wpan_dev_header_ops *header_ops;
 336
 337         /* lowpan interface, set when the wpan_dev belongs to one lowpan_dev */
 338         struct net_device *lowpan_dev;
 339
 340         u32 identifier;
 341
 342         /* MAC PIB */
 343         __le16 pan_id;
 344         __le16 short_addr;
 345         __le64 extended_addr;
 346
 347         /* MAC BSN field */
 348         atomic_t bsn;
 349         /* MAC DSN field */
 350         atomic_t dsn;
 351
 352         u8 min_be;
 353         u8 max_be;
 354         u8 csma_retries;
 355         s8 frame_retries;
 356
 357         bool lbt;
 358
 359         bool promiscuous_mode;
 360
 361         /* fallback for acknowledgment bit setting */
 362         bool ackreq;
 363 };
 364
 365 #define to_phy(_dev)    container_of(_dev, struct wpan_phy, dev)
 366
 367 static inline int
 368 wpan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
 369                      const struct ieee802154_addr *daddr,
 370                      const struct ieee802154_addr *saddr,
 371                      unsigned int len)
 372 {
 373         struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
 374
 375         return wpan_dev->header_ops->create(skb, dev, daddr, saddr, len);
 376 }
 377
 378 struct wpan_phy *
 379 wpan_phy_new(const struct cfg802154_ops *ops, size_t priv_size);
 380 static inline void wpan_phy_set_dev(struct wpan_phy *phy, struct device *dev)
 381 {
 382         phy->dev.parent = dev;
 383 }
 384
 385 int wpan_phy_register(struct wpan_phy *phy);
 386 void wpan_phy_unregister(struct wpan_phy *phy);
 387 void wpan_phy_free(struct wpan_phy *phy);
 388 /* Same semantics as for class_for_each_device */
 389 int wpan_phy_for_each(int (*fn)(struct wpan_phy *phy, void *data), void *data);
 390
 391 static inline void *wpan_phy_priv(struct wpan_phy *phy)
 392 {
 393         BUG_ON(!phy);
 394         return &phy->priv;
 395 }
 396
 397 struct wpan_phy *wpan_phy_find(const char *str);
 398
 399 static inline void wpan_phy_put(struct wpan_phy *phy)
 400 {
 401         put_device(&phy->dev);
 402 }
 403
 404 static inline const char *wpan_phy_name(struct wpan_phy *phy)
 405 {
 406         return dev_name(&phy->dev);
 407 }
 408
 409 #endif /* __NET_CFG802154_H */