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TOMOYO Linux Cross Reference
Linux/include/net/cfg802154.h

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

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