Commit 1fa25e41 authored by Luis R. Rodriguez's avatar Luis R. Rodriguez Committed by John W. Linville
Browse files

cfg80211: add wiphy_apply_custom_regulatory() 



This adds wiphy_apply_custom_regulatory() to be used by drivers
prior to wiphy registration to apply a custom regulatory domain.
This can be used by drivers that do not have a direct 1-1 mapping
between a regulatory domain and a country.

Signed-off-by: default avatarLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 078e1e60

include/net/wireless.h

+17 −0
Original line number Diff line number Diff line
@@ -401,4 +401,21 @@ extern void regulatory_hint(struct wiphy *wiphy, const char *alpha2); 
extern void regulatory_hint_11d(struct wiphy *wiphy,

				u8 *country_ie,

				u8 country_ie_len);



/**

 * wiphy_apply_custom_regulatory - apply a custom driver regulatory domain

 * @wiphy: the wireless device we want to process the regulatory domain on

 * @regd: the custom regulatory domain to use for this wiphy

 *

 * Drivers can sometimes have custom regulatory domains which do not apply

 * to a specific country. Drivers can use this to apply such custom regulatory

 * domains. This routine must be called prior to wiphy registration. The

 * custom regulatory domain will be trusted completely and as such previous

 * default channel settings will be disregarded. If no rule is found for a

 * channel on the regulatory domain the channel will be disabled.

 */

extern void wiphy_apply_custom_regulatory(

	struct wiphy *wiphy,

	const struct ieee80211_regdomain *regd);



#endif /* __NET_WIRELESS_H */

net/wireless/reg.c

+91 −24
Original line number Diff line number Diff line
@@ -782,36 +782,18 @@ static u32 map_regdom_flags(u32 rd_flags) 
	return channel_flags;

}



/**

 * freq_reg_info - get regulatory information for the given frequency

 * @wiphy: the wiphy for which we want to process this rule for

 * @center_freq: Frequency in KHz for which we want regulatory information for

 * @bandwidth: the bandwidth requirement you have in KHz, if you do not have one

 * 	you can set this to 0. If this frequency is allowed we then set

 * 	this value to the maximum allowed bandwidth.

 * @reg_rule: the regulatory rule which we have for this frequency

 *

 * Use this function to get the regulatory rule for a specific frequency on

 * a given wireless device. If the device has a specific regulatory domain

 * it wants to follow we respect that unless a country IE has been received

 * and processed already.

 *

 * Returns 0 if it was able to find a valid regulatory rule which does

 * apply to the given center_freq otherwise it returns non-zero. It will

 * also return -ERANGE if we determine the given center_freq does not even have

 * a regulatory rule for a frequency range in the center_freq's band. See

 * freq_in_rule_band() for our current definition of a band -- this is purely

 * subjective and right now its 802.11 specific.

 */

static int freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 *bandwidth,

			 const struct ieee80211_reg_rule **reg_rule)

static int freq_reg_info_regd(struct wiphy *wiphy,

			      u32 center_freq,

			      u32 *bandwidth,

			      const struct ieee80211_reg_rule **reg_rule,

			      const struct ieee80211_regdomain *custom_regd)

{

	int i;

	bool band_rule_found = false;

	const struct ieee80211_regdomain *regd;

	u32 max_bandwidth = 0;



	regd = cfg80211_regdomain;

	regd = custom_regd ? custom_regd : cfg80211_regdomain;



	/* Follow the driver's regulatory domain, if present, unless a country

	 * IE has been processed */
@@ -852,6 +834,34 @@ static int freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 *bandwidth, 
	return !max_bandwidth;

}



/**

 * freq_reg_info - get regulatory information for the given frequency

 * @wiphy: the wiphy for which we want to process this rule for

 * @center_freq: Frequency in KHz for which we want regulatory information for

 * @bandwidth: the bandwidth requirement you have in KHz, if you do not have one

 * 	you can set this to 0. If this frequency is allowed we then set

 * 	this value to the maximum allowed bandwidth.

 * @reg_rule: the regulatory rule which we have for this frequency

 *

 * Use this function to get the regulatory rule for a specific frequency on

 * a given wireless device. If the device has a specific regulatory domain

 * it wants to follow we respect that unless a country IE has been received

 * and processed already.

 *

 * Returns 0 if it was able to find a valid regulatory rule which does

 * apply to the given center_freq otherwise it returns non-zero. It will

 * also return -ERANGE if we determine the given center_freq does not even have

 * a regulatory rule for a frequency range in the center_freq's band. See

 * freq_in_rule_band() for our current definition of a band -- this is purely

 * subjective and right now its 802.11 specific.

 */

static int freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 *bandwidth,

			 const struct ieee80211_reg_rule **reg_rule)

{

	return freq_reg_info_regd(wiphy, center_freq,

		bandwidth, reg_rule, NULL);

}



static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band,

			   unsigned int chan_idx)

{
@@ -962,6 +972,63 @@ void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby) 
		wiphy->reg_notifier(wiphy, setby);

}



static void handle_channel_custom(struct wiphy *wiphy,

				  enum ieee80211_band band,

				  unsigned int chan_idx,

				  const struct ieee80211_regdomain *regd)

{

	int r;

	u32 max_bandwidth = 0;

	const struct ieee80211_reg_rule *reg_rule = NULL;

	const struct ieee80211_power_rule *power_rule = NULL;

	struct ieee80211_supported_band *sband;

	struct ieee80211_channel *chan;



	sband = wiphy->bands[band];

	BUG_ON(chan_idx >= sband->n_channels);

	chan = &sband->channels[chan_idx];



	r = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq),

		&max_bandwidth, &reg_rule, regd);



	if (r) {

		chan->flags = IEEE80211_CHAN_DISABLED;

		return;

	}



	power_rule = &reg_rule->power_rule;



	chan->flags |= map_regdom_flags(reg_rule->flags);

	chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);

	chan->max_bandwidth = KHZ_TO_MHZ(max_bandwidth);

	chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp);

}



static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band,

			       const struct ieee80211_regdomain *regd)

{

	unsigned int i;

	struct ieee80211_supported_band *sband;



	BUG_ON(!wiphy->bands[band]);

	sband = wiphy->bands[band];



	for (i = 0; i < sband->n_channels; i++)

		handle_channel_custom(wiphy, band, i, regd);

}



/* Used by drivers prior to wiphy registration */

void wiphy_apply_custom_regulatory(struct wiphy *wiphy,

				   const struct ieee80211_regdomain *regd)

{

	enum ieee80211_band band;

	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {

		if (wiphy->bands[band])

			handle_band_custom(wiphy, band, regd);

	}

}

EXPORT_SYMBOL(wiphy_apply_custom_regulatory);



static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd,

			 const struct ieee80211_regdomain *src_regd)

{

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