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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     (*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 */
240 

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