1 #ifndef __NET_WIRELESS_H
2 #define __NET_WIRELESS_H
5 * 802.11 device management
7 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
10 #include <linux/netdevice.h>
11 #include <linux/debugfs.h>
12 #include <linux/list.h>
13 #include <linux/ieee80211.h>
14 #include <net/cfg80211.h>
17 * enum ieee80211_band - supported frequency bands
19 * The bands are assigned this way because the supported
20 * bitrates differ in these bands.
22 * @IEEE80211_BAND_2GHZ: 2.4GHz ISM band
23 * @IEEE80211_BAND_5GHZ: around 5GHz band (4.9-5.7)
34 * enum ieee80211_channel_flags - channel flags
36 * Channel flags set by the regulatory control code.
38 * @IEEE80211_CHAN_DISABLED: This channel is disabled.
39 * @IEEE80211_CHAN_PASSIVE_SCAN: Only passive scanning is permitted
41 * @IEEE80211_CHAN_NO_IBSS: IBSS is not allowed on this channel.
42 * @IEEE80211_CHAN_RADAR: Radar detection is required on this channel.
43 * @IEEE80211_CHAN_NO_FAT_ABOVE: extension channel above this channel
45 * @IEEE80211_CHAN_NO_FAT_BELOW: extension channel below this channel
48 enum ieee80211_channel_flags {
49 IEEE80211_CHAN_DISABLED = 1<<0,
50 IEEE80211_CHAN_PASSIVE_SCAN = 1<<1,
51 IEEE80211_CHAN_NO_IBSS = 1<<2,
52 IEEE80211_CHAN_RADAR = 1<<3,
53 IEEE80211_CHAN_NO_FAT_ABOVE = 1<<4,
54 IEEE80211_CHAN_NO_FAT_BELOW = 1<<5,
58 * struct ieee80211_channel - channel definition
60 * This structure describes a single channel for use
63 * @center_freq: center frequency in MHz
64 * @max_bandwidth: maximum allowed bandwidth for this channel, in MHz
65 * @hw_value: hardware-specific value for the channel
66 * @flags: channel flags from &enum ieee80211_channel_flags.
67 * @orig_flags: channel flags at registration time, used by regulatory
68 * code to support devices with additional restrictions
69 * @band: band this channel belongs to.
70 * @max_antenna_gain: maximum antenna gain in dBi
71 * @max_power: maximum transmission power (in dBm)
72 * @orig_mag: internal use
73 * @orig_mpwr: internal use
75 struct ieee80211_channel {
76 enum ieee80211_band band;
84 int orig_mag, orig_mpwr;
88 * enum ieee80211_rate_flags - rate flags
90 * Hardware/specification flags for rates. These are structured
91 * in a way that allows using the same bitrate structure for
92 * different bands/PHY modes.
94 * @IEEE80211_RATE_SHORT_PREAMBLE: Hardware can send with short
95 * preamble on this bitrate; only relevant in 2.4GHz band and
97 * @IEEE80211_RATE_MANDATORY_A: This bitrate is a mandatory rate
98 * when used with 802.11a (on the 5 GHz band); filled by the
99 * core code when registering the wiphy.
100 * @IEEE80211_RATE_MANDATORY_B: This bitrate is a mandatory rate
101 * when used with 802.11b (on the 2.4 GHz band); filled by the
102 * core code when registering the wiphy.
103 * @IEEE80211_RATE_MANDATORY_G: This bitrate is a mandatory rate
104 * when used with 802.11g (on the 2.4 GHz band); filled by the
105 * core code when registering the wiphy.
106 * @IEEE80211_RATE_ERP_G: This is an ERP rate in 802.11g mode.
108 enum ieee80211_rate_flags {
109 IEEE80211_RATE_SHORT_PREAMBLE = 1<<0,
110 IEEE80211_RATE_MANDATORY_A = 1<<1,
111 IEEE80211_RATE_MANDATORY_B = 1<<2,
112 IEEE80211_RATE_MANDATORY_G = 1<<3,
113 IEEE80211_RATE_ERP_G = 1<<4,
117 * struct ieee80211_rate - bitrate definition
119 * This structure describes a bitrate that an 802.11 PHY can
120 * operate with. The two values @hw_value and @hw_value_short
121 * are only for driver use when pointers to this structure are
124 * @flags: rate-specific flags
125 * @bitrate: bitrate in units of 100 Kbps
126 * @hw_value: driver/hardware value for this rate
127 * @hw_value_short: driver/hardware value for this rate when
128 * short preamble is used
130 struct ieee80211_rate {
133 u16 hw_value, hw_value_short;
137 * struct ieee80211_sta_ht_cap - STA's HT capabilities
139 * This structure describes most essential parameters needed
140 * to describe 802.11n HT capabilities for an STA.
142 * @ht_supported: is HT supported by the STA
143 * @cap: HT capabilities map as described in 802.11n spec
144 * @ampdu_factor: Maximum A-MPDU length factor
145 * @ampdu_density: Minimum A-MPDU spacing
146 * @mcs: Supported MCS rates
148 struct ieee80211_sta_ht_cap {
149 u16 cap; /* use IEEE80211_HT_CAP_ */
153 struct ieee80211_mcs_info mcs;
157 * struct ieee80211_supported_band - frequency band definition
159 * This structure describes a frequency band a wiphy
160 * is able to operate in.
162 * @channels: Array of channels the hardware can operate in
164 * @band: the band this structure represents
165 * @n_channels: Number of channels in @channels
166 * @bitrates: Array of bitrates the hardware can operate with
167 * in this band. Must be sorted to give a valid "supported
168 * rates" IE, i.e. CCK rates first, then OFDM.
169 * @n_bitrates: Number of bitrates in @bitrates
171 struct ieee80211_supported_band {
172 struct ieee80211_channel *channels;
173 struct ieee80211_rate *bitrates;
174 enum ieee80211_band band;
177 struct ieee80211_sta_ht_cap ht_cap;
181 * struct wiphy - wireless hardware description
182 * @idx: the wiphy index assigned to this item
183 * @class_dev: the class device representing /sys/class/ieee80211/<wiphy-name>
184 * @fw_handles_regulatory: tells us the firmware for this device
185 * has its own regulatory solution and cannot identify the
186 * ISO / IEC 3166 alpha2 it belongs to. When this is enabled
187 * we will disregard the first regulatory hint (when the
188 * initiator is %REGDOM_SET_BY_CORE).
189 * @reg_notifier: the driver's regulatory notification callback
192 /* assign these fields before you register the wiphy */
194 /* permanent MAC address */
195 u8 perm_addr[ETH_ALEN];
197 /* Supported interface modes, OR together BIT(NL80211_IFTYPE_...) */
200 bool fw_handles_regulatory;
202 /* If multiple wiphys are registered and you're handed e.g.
203 * a regular netdev with assigned ieee80211_ptr, you won't
204 * know whether it points to a wiphy your driver has registered
205 * or not. Assign this to something global to your driver to
206 * help determine whether you own this wiphy or not. */
209 struct ieee80211_supported_band *bands[IEEE80211_NUM_BANDS];
211 /* Lets us get back the wiphy on the callback */
212 int (*reg_notifier)(struct wiphy *wiphy, enum reg_set_by setby);
214 /* fields below are read-only, assigned by cfg80211 */
216 /* the item in /sys/class/ieee80211/ points to this,
217 * you need use set_wiphy_dev() (see below) */
220 /* dir in debugfs: ieee80211/<wiphyname> */
221 struct dentry *debugfsdir;
223 char priv[0] __attribute__((__aligned__(NETDEV_ALIGN)));
226 /** struct wireless_dev - wireless per-netdev state
228 * This structure must be allocated by the driver/stack
229 * that uses the ieee80211_ptr field in struct net_device
230 * (this is intentional so it can be allocated along with
233 * @wiphy: pointer to hardware description
234 * @iftype: interface type
236 struct wireless_dev {
238 enum nl80211_iftype iftype;
240 /* private to the generic wireless code */
241 struct list_head list;
242 struct net_device *netdev;
246 * wiphy_priv - return priv from wiphy
248 static inline void *wiphy_priv(struct wiphy *wiphy)
255 * set_wiphy_dev - set device pointer for wiphy
257 static inline void set_wiphy_dev(struct wiphy *wiphy, struct device *dev)
259 wiphy->dev.parent = dev;
263 * wiphy_dev - get wiphy dev pointer
265 static inline struct device *wiphy_dev(struct wiphy *wiphy)
267 return wiphy->dev.parent;
271 * wiphy_name - get wiphy name
273 static inline const char *wiphy_name(struct wiphy *wiphy)
275 return dev_name(&wiphy->dev);
279 * wdev_priv - return wiphy priv from wireless_dev
281 static inline void *wdev_priv(struct wireless_dev *wdev)
284 return wiphy_priv(wdev->wiphy);
288 * wiphy_new - create a new wiphy for use with cfg80211
290 * create a new wiphy and associate the given operations with it.
291 * @sizeof_priv bytes are allocated for private use.
293 * the returned pointer must be assigned to each netdev's
294 * ieee80211_ptr for proper operation.
296 struct wiphy *wiphy_new(struct cfg80211_ops *ops, int sizeof_priv);
299 * wiphy_register - register a wiphy with cfg80211
301 * register the given wiphy
303 * Returns a non-negative wiphy index or a negative error code.
305 extern int wiphy_register(struct wiphy *wiphy);
308 * wiphy_unregister - deregister a wiphy from cfg80211
310 * unregister a device with the given priv pointer.
311 * After this call, no more requests can be made with this priv
312 * pointer, but the call may sleep to wait for an outstanding
313 * request that is being handled.
315 extern void wiphy_unregister(struct wiphy *wiphy);
318 * wiphy_free - free wiphy
320 extern void wiphy_free(struct wiphy *wiphy);
323 * ieee80211_channel_to_frequency - convert channel number to frequency
325 extern int ieee80211_channel_to_frequency(int chan);
328 * ieee80211_frequency_to_channel - convert frequency to channel number
330 extern int ieee80211_frequency_to_channel(int freq);
333 * Name indirection necessary because the ieee80211 code also has
334 * a function named "ieee80211_get_channel", so if you include
335 * cfg80211's header file you get cfg80211's version, if you try
336 * to include both header files you'll (rightfully!) get a symbol
339 extern struct ieee80211_channel *__ieee80211_get_channel(struct wiphy *wiphy,
342 * ieee80211_get_channel - get channel struct from wiphy for specified frequency
344 static inline struct ieee80211_channel *
345 ieee80211_get_channel(struct wiphy *wiphy, int freq)
347 return __ieee80211_get_channel(wiphy, freq);
351 * ieee80211_get_response_rate - get basic rate for a given rate
353 * @sband: the band to look for rates in
354 * @basic_rates: bitmap of basic rates
355 * @bitrate: the bitrate for which to find the basic rate
357 * This function returns the basic rate corresponding to a given
358 * bitrate, that is the next lower bitrate contained in the basic
359 * rate map, which is, for this function, given as a bitmap of
360 * indices of rates in the band's bitrate table.
362 struct ieee80211_rate *
363 ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
364 u64 basic_rates, int bitrate);
367 * regulatory_hint - driver hint to the wireless core a regulatory domain
368 * @wiphy: the wireless device giving the hint (used only for reporting
370 * @alpha2: the ISO/IEC 3166 alpha2 the driver claims its regulatory domain
371 * should be in. If @rd is set this should be NULL. Note that if you
372 * set this to NULL you should still set rd->alpha2 to some accepted
375 * Wireless drivers can use this function to hint to the wireless core
376 * what it believes should be the current regulatory domain by
377 * giving it an ISO/IEC 3166 alpha2 country code it knows its regulatory
378 * domain should be in or by providing a completely build regulatory domain.
379 * If the driver provides an ISO/IEC 3166 alpha2 userspace will be queried
380 * for a regulatory domain structure for the respective country.
382 extern void regulatory_hint(struct wiphy *wiphy, const char *alpha2);
385 * regulatory_hint_11d - hints a country IE as a regulatory domain
386 * @wiphy: the wireless device giving the hint (used only for reporting
388 * @country_ie: pointer to the country IE
389 * @country_ie_len: length of the country IE
391 * We will intersect the rd with the what CRDA tells us should apply
392 * for the alpha2 this country IE belongs to, this prevents APs from
393 * sending us incorrect or outdated information against a country.
395 extern void regulatory_hint_11d(struct wiphy *wiphy,
398 #endif /* __NET_WIRELESS_H */