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