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 struct cfg802154_ops {
  31         struct net_device * (*add_virtual_intf_deprecated)(struct wpan_phy *wpan_phy,
  32                                                            const char *name,
  33                                                            unsigned char name_assign_type,
  34                                                            int type);
  35         void    (*del_virtual_intf_deprecated)(struct wpan_phy *wpan_phy,
  36                                                struct net_device *dev);
  37         int     (*suspend)(struct wpan_phy *wpan_phy);
  38         int     (*resume)(struct wpan_phy *wpan_phy);
  39         int     (*add_virtual_intf)(struct wpan_phy *wpan_phy,
  40                                     const char *name,
  41                                     unsigned char name_assign_type,
  42                                     enum nl802154_iftype type,
  43                                     __le64 extended_addr);
  44         int     (*del_virtual_intf)(struct wpan_phy *wpan_phy,
  45                                     struct wpan_dev *wpan_dev);
  46         int     (*set_channel)(struct wpan_phy *wpan_phy, u8 page, u8 channel);
  47         int     (*set_cca_mode)(struct wpan_phy *wpan_phy,
  48                                 const struct wpan_phy_cca *cca);
  49         int     (*set_cca_ed_level)(struct wpan_phy *wpan_phy, s32 ed_level);
  50         int     (*set_tx_power)(struct wpan_phy *wpan_phy, s32 power);
  51         int     (*set_pan_id)(struct wpan_phy *wpan_phy,
  52                               struct wpan_dev *wpan_dev, __le16 pan_id);
  53         int     (*set_short_addr)(struct wpan_phy *wpan_phy,
  54                                   struct wpan_dev *wpan_dev, __le16 short_addr);
  55         int     (*set_backoff_exponent)(struct wpan_phy *wpan_phy,
  56                                         struct wpan_dev *wpan_dev, u8 min_be,
  57                                         u8 max_be);
  58         int     (*set_max_csma_backoffs)(struct wpan_phy *wpan_phy,
  59                                          struct wpan_dev *wpan_dev,
  60                                          u8 max_csma_backoffs);
  61         int     (*set_max_frame_retries)(struct wpan_phy *wpan_phy,
  62                                          struct wpan_dev *wpan_dev,
  63                                          s8 max_frame_retries);
  64         int     (*set_lbt_mode)(struct wpan_phy *wpan_phy,
  65                                 struct wpan_dev *wpan_dev, bool mode);
  66         int     (*set_ackreq_default)(struct wpan_phy *wpan_phy,
  67                                       struct wpan_dev *wpan_dev, bool ackreq);
  68 };
  69
  70 static inline bool
  71 wpan_phy_supported_bool(bool b, enum nl802154_supported_bool_states st)
  72 {
  73         switch (st) {
  74         case NL802154_SUPPORTED_BOOL_TRUE:
  75                 return b;
  76         case NL802154_SUPPORTED_BOOL_FALSE:
  77                 return !b;
  78         case NL802154_SUPPORTED_BOOL_BOTH:
  79                 return true;
  80         default:
  81                 WARN_ON(1);
  82         }
  83
  84         return false;
  85 }
  86
  87 struct wpan_phy_supported {
  88         u32 channels[IEEE802154_MAX_PAGE + 1],
  89             cca_modes, cca_opts, iftypes;
  90         enum nl802154_supported_bool_states lbt;
  91         u8 min_minbe, max_minbe, min_maxbe, max_maxbe,
  92            min_csma_backoffs, max_csma_backoffs;
  93         s8 min_frame_retries, max_frame_retries;
  94         size_t tx_powers_size, cca_ed_levels_size;
  95         const s32 *tx_powers, *cca_ed_levels;
  96 };
  97
  98 struct wpan_phy_cca {
  99         enum nl802154_cca_modes mode;
 100         enum nl802154_cca_opts opt;
 101 };
 102
 103 static inline bool
 104 wpan_phy_cca_cmp(const struct wpan_phy_cca *a, const struct wpan_phy_cca *b)
 105 {
 106         if (a->mode != b->mode)
 107                 return false;
 108
 109         if (a->mode == NL802154_CCA_ENERGY_CARRIER)
 110                 return a->opt == b->opt;
 111
 112         return true;
 113 }
 114
 115 /**
 116  * @WPAN_PHY_FLAG_TRANSMIT_POWER: Indicates that transceiver will support
 117  *      transmit power setting.
 118  * @WPAN_PHY_FLAG_CCA_ED_LEVEL: Indicates that transceiver will support cca ed
 119  *      level setting.
 120  * @WPAN_PHY_FLAG_CCA_MODE: Indicates that transceiver will support cca mode
 121  *      setting.
 122  */
 123 enum wpan_phy_flags {
 124         WPAN_PHY_FLAG_TXPOWER           = BIT(1),
 125         WPAN_PHY_FLAG_CCA_ED_LEVEL      = BIT(2),
 126         WPAN_PHY_FLAG_CCA_MODE          = BIT(3),
 127 };
 128
 129 struct wpan_phy {
 130         /* If multiple wpan_phys are registered and you're handed e.g.
 131          * a regular netdev with assigned ieee802154_ptr, you won't
 132          * know whether it points to a wpan_phy your driver has registered
 133          * or not. Assign this to something global to your driver to
 134          * help determine whether you own this wpan_phy or not.
 135          */
 136         const void *privid;
 137
 138         u32 flags;
 139
 140         /*
 141          * This is a PIB according to 802.15.4-2011.
 142          * We do not provide timing-related variables, as they
 143          * aren't used outside of driver
 144          */
 145         u8 current_channel;
 146         u8 current_page;
 147         struct wpan_phy_supported supported;
 148         /* current transmit_power in mBm */
 149         s32 transmit_power;
 150         struct wpan_phy_cca cca;
 151
 152         __le64 perm_extended_addr;
 153
 154         /* current cca ed threshold in mBm */
 155         s32 cca_ed_level;
 156
 157         /* PHY depended MAC PIB values */
 158
 159         /* 802.15.4 acronym: Tdsym in usec */
 160         u8 symbol_duration;
 161         /* lifs and sifs periods timing */
 162         u16 lifs_period;
 163         u16 sifs_period;
 164
 165         struct device dev;
 166
 167         char priv[0] __aligned(NETDEV_ALIGN);
 168 };
 169
 170 struct wpan_dev {
 171         struct wpan_phy *wpan_phy;
 172         int iftype;
 173
 174         /* the remainder of this struct should be private to cfg802154 */
 175         struct list_head list;
 176         struct net_device *netdev;
 177
 178         /* lowpan interface, set when the wpan_dev belongs to one lowpan_dev */
 179         struct net_device *lowpan_dev;
 180
 181         u32 identifier;
 182
 183         /* MAC PIB */
 184         __le16 pan_id;
 185         __le16 short_addr;
 186         __le64 extended_addr;
 187
 188         /* MAC BSN field */
 189         atomic_t bsn;
 190         /* MAC DSN field */
 191         atomic_t dsn;
 192
 193         u8 min_be;
 194         u8 max_be;
 195         u8 csma_retries;
 196         s8 frame_retries;
 197
 198         bool lbt;
 199
 200         bool promiscuous_mode;
 201
 202         /* fallback for acknowledgment bit setting */
 203         bool ackreq;
 204 };
 205
 206 #define to_phy(_dev)    container_of(_dev, struct wpan_phy, dev)
 207
 208 struct wpan_phy *
 209 wpan_phy_new(const struct cfg802154_ops *ops, size_t priv_size);
 210 static inline void wpan_phy_set_dev(struct wpan_phy *phy, struct device *dev)
 211 {
 212         phy->dev.parent = dev;
 213 }
 214
 215 int wpan_phy_register(struct wpan_phy *phy);
 216 void wpan_phy_unregister(struct wpan_phy *phy);
 217 void wpan_phy_free(struct wpan_phy *phy);
 218 /* Same semantics as for class_for_each_device */
 219 int wpan_phy_for_each(int (*fn)(struct wpan_phy *phy, void *data), void *data);
 220
 221 static inline void *wpan_phy_priv(struct wpan_phy *phy)
 222 {
 223         BUG_ON(!phy);
 224         return &phy->priv;
 225 }
 226
 227 struct wpan_phy *wpan_phy_find(const char *str);
 228
 229 static inline void wpan_phy_put(struct wpan_phy *phy)
 230 {
 231         put_device(&phy->dev);
 232 }
 233
 234 static inline const char *wpan_phy_name(struct wpan_phy *phy)
 235 {
 236         return dev_name(&phy->dev);
 237 }
 238
 239 #endif /* __NET_CFG802154_H */