include/net/cfg802154.h

   1 /*
   2  * Copyright (C) 2007, 2008, 2009 Siemens AG
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2
   6  * as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * Written by:
  14  * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
  15  */
  16
  17 #ifndef __NET_CFG802154_H
  18 #define __NET_CFG802154_H
  19
  20 #include <linux/ieee802154.h>
  21 #include <linux/netdevice.h>
  22 #include <linux/mutex.h>
  23 #include <linux/bug.h>
  24
  25 #include <net/nl802154.h>
  26
  27 struct wpan_phy;
  28 struct wpan_phy_cca;
  29
  30 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
  31 struct ieee802154_llsec_device_key;
  32 struct ieee802154_llsec_seclevel;
  33 struct ieee802154_llsec_params;
  34 struct ieee802154_llsec_device;
  35 struct ieee802154_llsec_table;
  36 struct ieee802154_llsec_key_id;
  37 struct ieee802154_llsec_key;
  38 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
  39
  40 struct cfg802154_ops {
  41         struct net_device * (*add_virtual_intf_deprecated)(struct wpan_phy *wpan_phy,
  42                                                            const char *name,
  43                                                            unsigned char name_assign_type,
  44                                                            int type);
  45         void    (*del_virtual_intf_deprecated)(struct wpan_phy *wpan_phy,
  46                                                struct net_device *dev);
  47         int     (*suspend)(struct wpan_phy *wpan_phy);
  48         int     (*resume)(struct wpan_phy *wpan_phy);
  49         int     (*add_virtual_intf)(struct wpan_phy *wpan_phy,
  50                                     const char *name,
  51                                     unsigned char name_assign_type,
  52                                     enum nl802154_iftype type,
  53                                     __le64 extended_addr);
  54         int     (*del_virtual_intf)(struct wpan_phy *wpan_phy,
  55                                     struct wpan_dev *wpan_dev);
  56         int     (*set_channel)(struct wpan_phy *wpan_phy, u8 page, u8 channel);
  57         int     (*set_cca_mode)(struct wpan_phy *wpan_phy,
  58                                 const struct wpan_phy_cca *cca);
  59         int     (*set_cca_ed_level)(struct wpan_phy *wpan_phy, s32 ed_level);
  60         int     (*set_tx_power)(struct wpan_phy *wpan_phy, s32 power);
  61         int     (*set_pan_id)(struct wpan_phy *wpan_phy,
  62                               struct wpan_dev *wpan_dev, __le16 pan_id);
  63         int     (*set_short_addr)(struct wpan_phy *wpan_phy,
  64                                   struct wpan_dev *wpan_dev, __le16 short_addr);
  65         int     (*set_backoff_exponent)(struct wpan_phy *wpan_phy,
  66                                         struct wpan_dev *wpan_dev, u8 min_be,
  67                                         u8 max_be);
  68         int     (*set_max_csma_backoffs)(struct wpan_phy *wpan_phy,
  69                                          struct wpan_dev *wpan_dev,
  70                                          u8 max_csma_backoffs);
  71         int     (*set_max_frame_retries)(struct wpan_phy *wpan_phy,
  72                                          struct wpan_dev *wpan_dev,
  73                                          s8 max_frame_retries);
  74         int     (*set_lbt_mode)(struct wpan_phy *wpan_phy,
  75                                 struct wpan_dev *wpan_dev, bool mode);
  76         int     (*set_ackreq_default)(struct wpan_phy *wpan_phy,
  77                                       struct wpan_dev *wpan_dev, bool ackreq);
  78 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
  79         void    (*get_llsec_table)(struct wpan_phy *wpan_phy,
  80                                    struct wpan_dev *wpan_dev,
  81                                    struct ieee802154_llsec_table **table);
  82         void    (*lock_llsec_table)(struct wpan_phy *wpan_phy,
  83                                     struct wpan_dev *wpan_dev);
  84         void    (*unlock_llsec_table)(struct wpan_phy *wpan_phy,
  85                                       struct wpan_dev *wpan_dev);
  86         /* TODO remove locking/get table callbacks, this is part of the
  87          * nl802154 interface and should be accessible from ieee802154 layer.
  88          */
  89         int     (*get_llsec_params)(struct wpan_phy *wpan_phy,
  90                                     struct wpan_dev *wpan_dev,
  91                                     struct ieee802154_llsec_params *params);
  92         int     (*set_llsec_params)(struct wpan_phy *wpan_phy,
  93                                     struct wpan_dev *wpan_dev,
  94                                     const struct ieee802154_llsec_params *params,
  95                                     int changed);
  96         int     (*add_llsec_key)(struct wpan_phy *wpan_phy,
  97                                  struct wpan_dev *wpan_dev,
  98                                  const struct ieee802154_llsec_key_id *id,
  99                                  const struct ieee802154_llsec_key *key);
 100         int     (*del_llsec_key)(struct wpan_phy *wpan_phy,
 101                                  struct wpan_dev *wpan_dev,
 102                                  const struct ieee802154_llsec_key_id *id);
 103         int     (*add_seclevel)(struct wpan_phy *wpan_phy,
 104                                  struct wpan_dev *wpan_dev,
 105                                  const struct ieee802154_llsec_seclevel *sl);
 106         int     (*del_seclevel)(struct wpan_phy *wpan_phy,
 107                                  struct wpan_dev *wpan_dev,
 108                                  const struct ieee802154_llsec_seclevel *sl);
 109         int     (*add_device)(struct wpan_phy *wpan_phy,
 110                               struct wpan_dev *wpan_dev,
 111                               const struct ieee802154_llsec_device *dev);
 112         int     (*del_device)(struct wpan_phy *wpan_phy,
 113                               struct wpan_dev *wpan_dev, __le64 extended_addr);
 114         int     (*add_devkey)(struct wpan_phy *wpan_phy,
 115                               struct wpan_dev *wpan_dev,
 116                               __le64 extended_addr,
 117                               const struct ieee802154_llsec_device_key *key);
 118         int     (*del_devkey)(struct wpan_phy *wpan_phy,
 119                               struct wpan_dev *wpan_dev,
 120                               __le64 extended_addr,
 121                               const struct ieee802154_llsec_device_key *key);
 122 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
 123 };
 124
 125 static inline bool
 126 wpan_phy_supported_bool(bool b, enum nl802154_supported_bool_states st)
 127 {
 128         switch (st) {
 129         case NL802154_SUPPORTED_BOOL_TRUE:
 130                 return b;
 131         case NL802154_SUPPORTED_BOOL_FALSE:
 132                 return !b;
 133         case NL802154_SUPPORTED_BOOL_BOTH:
 134                 return true;
 135         default:
 136                 WARN_ON(1);
 137         }
 138
 139         return false;
 140 }
 141
 142 struct wpan_phy_supported {
 143         u32 channels[IEEE802154_MAX_PAGE + 1],
 144             cca_modes, cca_opts, iftypes;
 145         enum nl802154_supported_bool_states lbt;
 146         u8 min_minbe, max_minbe, min_maxbe, max_maxbe,
 147            min_csma_backoffs, max_csma_backoffs;
 148         s8 min_frame_retries, max_frame_retries;
 149         size_t tx_powers_size, cca_ed_levels_size;
 150         const s32 *tx_powers, *cca_ed_levels;
 151 };
 152
 153 struct wpan_phy_cca {
 154         enum nl802154_cca_modes mode;
 155         enum nl802154_cca_opts opt;
 156 };
 157
 158 static inline bool
 159 wpan_phy_cca_cmp(const struct wpan_phy_cca *a, const struct wpan_phy_cca *b)
 160 {
 161         if (a->mode != b->mode)
 162                 return false;
 163
 164         if (a->mode == NL802154_CCA_ENERGY_CARRIER)
 165                 return a->opt == b->opt;
 166
 167         return true;
 168 }
 169
 170 /**
 171  * @WPAN_PHY_FLAG_TRANSMIT_POWER: Indicates that transceiver will support
 172  *      transmit power setting.
 173  * @WPAN_PHY_FLAG_CCA_ED_LEVEL: Indicates that transceiver will support cca ed
 174  *      level setting.
 175  * @WPAN_PHY_FLAG_CCA_MODE: Indicates that transceiver will support cca mode
 176  *      setting.
 177  */
 178 enum wpan_phy_flags {
 179         WPAN_PHY_FLAG_TXPOWER           = BIT(1),
 180         WPAN_PHY_FLAG_CCA_ED_LEVEL      = BIT(2),
 181         WPAN_PHY_FLAG_CCA_MODE          = BIT(3),
 182 };
 183
 184 struct wpan_phy {
 185         /* If multiple wpan_phys are registered and you're handed e.g.
 186          * a regular netdev with assigned ieee802154_ptr, you won't
 187          * know whether it points to a wpan_phy your driver has registered
 188          * or not. Assign this to something global to your driver to
 189          * help determine whether you own this wpan_phy or not.
 190          */
 191         const void *privid;
 192
 193         u32 flags;
 194
 195         /*
 196          * This is a PIB according to 802.15.4-2011.
 197          * We do not provide timing-related variables, as they
 198          * aren't used outside of driver
 199          */
 200         u8 current_channel;
 201         u8 current_page;
 202         struct wpan_phy_supported supported;
 203         /* current transmit_power in mBm */
 204         s32 transmit_power;
 205         struct wpan_phy_cca cca;
 206
 207         __le64 perm_extended_addr;
 208
 209         /* current cca ed threshold in mBm */
 210         s32 cca_ed_level;
 211
 212         /* PHY depended MAC PIB values */
 213
 214         /* 802.15.4 acronym: Tdsym in usec */
 215         u8 symbol_duration;
 216         /* lifs and sifs periods timing */
 217         u16 lifs_period;
 218         u16 sifs_period;
 219
 220         struct device dev;
 221
 222         /* the network namespace this phy lives in currently */
 223         possible_net_t _net;
 224
 225         char priv[0] __aligned(NETDEV_ALIGN);
 226 };
 227
 228 static inline struct net *wpan_phy_net(struct wpan_phy *wpan_phy)
 229 {
 230         return read_pnet(&wpan_phy->_net);
 231 }
 232
 233 static inline void wpan_phy_net_set(struct wpan_phy *wpan_phy, struct net *net)
 234 {
 235         write_pnet(&wpan_phy->_net, net);
 236 }
 237
 238 struct ieee802154_addr {
 239         u8 mode;
 240         __le16 pan_id;
 241         union {
 242                 __le16 short_addr;
 243                 __le64 extended_addr;
 244         };
 245 };
 246
 247 struct ieee802154_llsec_key_id {
 248         u8 mode;
 249         u8 id;
 250         union {
 251                 struct ieee802154_addr device_addr;
 252                 __le32 short_source;
 253                 __le64 extended_source;
 254         };
 255 };
 256
 257 #define IEEE802154_LLSEC_KEY_SIZE 16
 258
 259 struct ieee802154_llsec_key {
 260         u8 frame_types;
 261         u32 cmd_frame_ids;
 262         /* TODO replace with NL802154_KEY_SIZE */
 263         u8 key[IEEE802154_LLSEC_KEY_SIZE];
 264 };
 265
 266 struct ieee802154_llsec_key_entry {
 267         struct list_head list;
 268
 269         struct ieee802154_llsec_key_id id;
 270         struct ieee802154_llsec_key *key;
 271 };
 272
 273 struct ieee802154_llsec_params {
 274         bool enabled;
 275
 276         __be32 frame_counter;
 277         u8 out_level;
 278         struct ieee802154_llsec_key_id out_key;
 279
 280         __le64 default_key_source;
 281
 282         __le16 pan_id;
 283         __le64 hwaddr;
 284         __le64 coord_hwaddr;
 285         __le16 coord_shortaddr;
 286 };
 287
 288 struct ieee802154_llsec_table {
 289         struct list_head keys;
 290         struct list_head devices;
 291         struct list_head security_levels;
 292 };
 293
 294 struct ieee802154_llsec_seclevel {
 295         struct list_head list;
 296
 297         u8 frame_type;
 298         u8 cmd_frame_id;
 299         bool device_override;
 300         u32 sec_levels;
 301 };
 302
 303 struct ieee802154_llsec_device {
 304         struct list_head list;
 305
 306         __le16 pan_id;
 307         __le16 short_addr;
 308         __le64 hwaddr;
 309         u32 frame_counter;
 310         bool seclevel_exempt;
 311
 312         u8 key_mode;
 313         struct list_head keys;
 314 };
 315
 316 struct ieee802154_llsec_device_key {
 317         struct list_head list;
 318
 319         struct ieee802154_llsec_key_id key_id;
 320         u32 frame_counter;
 321 };
 322
 323 struct wpan_dev_header_ops {
 324         /* TODO create callback currently assumes ieee802154_mac_cb inside
 325          * skb->cb. This should be changed to give these information as
 326          * parameter.
 327          */
 328         int     (*create)(struct sk_buff *skb, struct net_device *dev,
 329                           const struct ieee802154_addr *daddr,
 330                           const struct ieee802154_addr *saddr,
 331                           unsigned int len);
 332 };
 333
 334 struct wpan_dev {
 335         struct wpan_phy *wpan_phy;
 336         int iftype;
 337
 338         /* the remainder of this struct should be private to cfg802154 */
 339         struct list_head list;
 340         struct net_device *netdev;
 341
 342         const struct wpan_dev_header_ops *header_ops;
 343
 344         /* lowpan interface, set when the wpan_dev belongs to one lowpan_dev */
 345         struct net_device *lowpan_dev;
 346
 347         u32 identifier;
 348
 349         /* MAC PIB */
 350         __le16 pan_id;
 351         __le16 short_addr;
 352         __le64 extended_addr;
 353
 354         /* MAC BSN field */
 355         atomic_t bsn;
 356         /* MAC DSN field */
 357         atomic_t dsn;
 358
 359         u8 min_be;
 360         u8 max_be;
 361         u8 csma_retries;
 362         s8 frame_retries;
 363
 364         bool lbt;
 365
 366         bool promiscuous_mode;
 367
 368         /* fallback for acknowledgment bit setting */
 369         bool ackreq;
 370 };
 371
 372 #define to_phy(_dev)    container_of(_dev, struct wpan_phy, dev)
 373
 374 static inline int
 375 wpan_dev_hard_header(struct sk_buff *skb, struct net_device *dev,
 376                      const struct ieee802154_addr *daddr,
 377                      const struct ieee802154_addr *saddr,
 378                      unsigned int len)
 379 {
 380         struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
 381
 382         return wpan_dev->header_ops->create(skb, dev, daddr, saddr, len);
 383 }
 384
 385 struct wpan_phy *
 386 wpan_phy_new(const struct cfg802154_ops *ops, size_t priv_size);
 387 static inline void wpan_phy_set_dev(struct wpan_phy *phy, struct device *dev)
 388 {
 389         phy->dev.parent = dev;
 390 }
 391
 392 int wpan_phy_register(struct wpan_phy *phy);
 393 void wpan_phy_unregister(struct wpan_phy *phy);
 394 void wpan_phy_free(struct wpan_phy *phy);
 395 /* Same semantics as for class_for_each_device */
 396 int wpan_phy_for_each(int (*fn)(struct wpan_phy *phy, void *data), void *data);
 397
 398 static inline void *wpan_phy_priv(struct wpan_phy *phy)
 399 {
 400         BUG_ON(!phy);
 401         return &phy->priv;
 402 }
 403
 404 struct wpan_phy *wpan_phy_find(const char *str);
 405
 406 static inline void wpan_phy_put(struct wpan_phy *phy)
 407 {
 408         put_device(&phy->dev);
 409 }
 410
 411 static inline const char *wpan_phy_name(struct wpan_phy *phy)
 412 {
 413         return dev_name(&phy->dev);
 414 }
 415
 416 #endif /* __NET_CFG802154_H */