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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: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Luis R. Rodriguez 2009-01-22 15:05:44 -08:00 committed by John W. Linville
parent 078e1e60dd
commit 1fa25e4136
2 changed files with 108 additions and 24 deletions
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17
include/net/wireless.h
View File

@ -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 */

115
net/wireless/reg.c
View File

@ -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)
{