4 files changed, 214 insertions, 2 deletions

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 5e51f4e7600b..9bad65400fba 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -92,6 +92,20 @@
  * @NL80211_CMD_SET_BSS: Set BSS attributes for BSS identified by
  *      %NL80211_ATTR_IFINDEX.
  *
+ * @NL80211_CMD_SET_REG: Set current regulatory domain. CRDA sends this command
+ *      after being queried by the kernel. CRDA replies by sending a regulatory
+ *      domain structure which consists of %NL80211_ATTR_REG_ALPHA set to our
+ *      current alpha2 if it found a match. It also provides
+ *      NL80211_ATTR_REG_RULE_FLAGS, and a set of regulatory rules. Each
+ *      regulatory rule is a nested set of attributes  given by
+ *      %NL80211_ATTR_REG_RULE_FREQ_[START|END] and
+ *      %NL80211_ATTR_FREQ_RANGE_MAX_BW with an attached power rule given by
+ *      %NL80211_ATTR_REG_RULE_POWER_MAX_ANT_GAIN and
+ *      %NL80211_ATTR_REG_RULE_POWER_MAX_EIRP.
+ * @NL80211_CMD_REQ_SET_REG: ask the wireless core to set the regulatory domain
+ *      to the the specified ISO/IEC 3166-1 alpha2 country code. The core will
+ *      store this as a valid request and then query userspace for it.
+ *
  * @NL80211_CMD_MAX: highest used command number
  * @__NL80211_CMD_AFTER_LAST: internal use
  */
@@ -131,7 +145,10 @@ enum nl80211_commands {
 
         NL80211_CMD_SET_BSS,
 
-        /* add commands here */
+        NL80211_CMD_SET_REG,
+        NL80211_CMD_REQ_SET_REG,
+
+        /* add new commands above here */
 
         /* used to define NL80211_CMD_MAX below */
         __NL80211_CMD_AFTER_LAST,
@@ -197,10 +214,21 @@ enum nl80211_commands {
  *      info given for %NL80211_CMD_GET_MPATH, nested attribute described at
  *      &enum nl80211_mpath_info.
  *
- *
  * @NL80211_ATTR_MNTR_FLAGS: flags, nested element with NLA_FLAG attributes of
  *      &enum nl80211_mntr_flags.
  *
+ * @NL80211_ATTR_REG_ALPHA2: an ISO-3166-alpha2 country code for which the
+ *      current regulatory domain should be set to or is already set to.
+ *      For example, 'CR', for Costa Rica. This attribute is used by the kernel
+ *      to query the CRDA to retrieve one regulatory domain. This attribute can
+ *      also be used by userspace to query the kernel for the currently set
+ *      regulatory domain. We chose an alpha2 as that is also used by the
+ *      IEEE-802.11d country information element to identify a country.
+ *      Users can also simply ask the wireless core to set regulatory domain
+ *      to a specific alpha2.
+ * @NL80211_ATTR_REG_RULES: a nested array of regulatory domain regulatory
+ *      rules.
+ *
  * @NL80211_ATTR_BSS_CTS_PROT: whether CTS protection is enabled (u8, 0 or 1)
  * @NL80211_ATTR_BSS_SHORT_PREAMBLE: whether short preamble is enabled
  *      (u8, 0 or 1)
@@ -265,6 +293,9 @@ enum nl80211_attrs {
 
         NL80211_ATTR_SUPPORTED_IFTYPES,
 
+        NL80211_ATTR_REG_ALPHA2,
+        NL80211_ATTR_REG_RULES,
+
         /* add attributes here, update the policy in nl80211.c */
 
         __NL80211_ATTR_AFTER_LAST,
@@ -278,6 +309,7 @@ enum nl80211_attrs {
 #define NL80211_ATTR_HT_CAPABILITY NL80211_ATTR_HT_CAPABILITY
 
 #define NL80211_MAX_SUPP_RATES                  32
+#define NL80211_MAX_SUPP_REG_RULES              32
 #define NL80211_TKIP_DATA_OFFSET_ENCR_KEY       0
 #define NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY     16
 #define NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY     24
@@ -473,6 +505,66 @@ enum nl80211_bitrate_attr {
 };
 
 /**
+ * enum nl80211_reg_rule_attr - regulatory rule attributes
+ * @NL80211_ATTR_REG_RULE_FLAGS: a set of flags which specify additional
+ *      considerations for a given frequency range. These are the
+ *      &enum nl80211_reg_rule_flags.
+ * @NL80211_ATTR_FREQ_RANGE_START: starting frequencry for the regulatory
+ *      rule in KHz. This is not a center of frequency but an actual regulatory
+ *      band edge.
+ * @NL80211_ATTR_FREQ_RANGE_END: ending frequency for the regulatory rule
+ *      in KHz. This is not a center a frequency but an actual regulatory
+ *      band edge.
+ * @NL80211_ATTR_FREQ_RANGE_MAX_BW: maximum allowed bandwidth for this
+ *      frequency range, in KHz.
+ * @NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN: the maximum allowed antenna gain
+ *      for a given frequency range. The value is in mBi (100 * dBi).
+ *      If you don't have one then don't send this.
+ * @NL80211_ATTR_POWER_RULE_MAX_EIRP: the maximum allowed EIRP for
+ *      a given frequency range. The value is in mBm (100 * dBm).
+ */
+enum nl80211_reg_rule_attr {
+        __NL80211_REG_RULE_ATTR_INVALID,
+        NL80211_ATTR_REG_RULE_FLAGS,
+
+        NL80211_ATTR_FREQ_RANGE_START,
+        NL80211_ATTR_FREQ_RANGE_END,
+        NL80211_ATTR_FREQ_RANGE_MAX_BW,
+
+        NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
+        NL80211_ATTR_POWER_RULE_MAX_EIRP,
+
+        /* keep last */
+        __NL80211_REG_RULE_ATTR_AFTER_LAST,
+        NL80211_REG_RULE_ATTR_MAX = __NL80211_REG_RULE_ATTR_AFTER_LAST - 1
+};
+
+/**
+ * enum nl80211_reg_rule_flags - regulatory rule flags
+ *
+ * @NL80211_RRF_NO_OFDM: OFDM modulation not allowed
+ * @NL80211_RRF_NO_CCK: CCK modulation not allowed
+ * @NL80211_RRF_NO_INDOOR: indoor operation not allowed
+ * @NL80211_RRF_NO_OUTDOOR: outdoor operation not allowed
+ * @NL80211_RRF_DFS: DFS support is required to be used
+ * @NL80211_RRF_PTP_ONLY: this is only for Point To Point links
+ * @NL80211_RRF_PTMP_ONLY: this is only for Point To Multi Point links
+ * @NL80211_RRF_PASSIVE_SCAN: passive scan is required
+ * @NL80211_RRF_NO_IBSS: no IBSS is allowed
+ */
+enum nl80211_reg_rule_flags {
+        NL80211_RRF_NO_OFDM             = 1<<0,
+        NL80211_RRF_NO_CCK              = 1<<1,
+        NL80211_RRF_NO_INDOOR           = 1<<2,
+        NL80211_RRF_NO_OUTDOOR          = 1<<3,
+        NL80211_RRF_DFS                 = 1<<4,
+        NL80211_RRF_PTP_ONLY            = 1<<5,
+        NL80211_RRF_PTMP_ONLY           = 1<<6,
+        NL80211_RRF_PASSIVE_SCAN        = 1<<7,
+        NL80211_RRF_NO_IBSS             = 1<<8,
+};
+
+/**
  * enum nl80211_mntr_flags - monitor configuration flags
  *
  * Monitor configuration flags.
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 0a72d1e3d3ab..9f40c4d417d7 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -287,6 +287,66 @@ struct bss_parameters {
         int use_short_slot_time;
 };
 
+/**
+ * enum reg_set_by - Indicates who is trying to set the regulatory domain
+ * @REGDOM_SET_BY_INIT: regulatory domain was set by initialization. We will be
+ *      using a static world regulatory domain by default.
+ * @REGDOM_SET_BY_CORE: Core queried CRDA for a dynamic world regulatory domain.
+ * @REGDOM_SET_BY_USER: User asked the wireless core to set the
+ *      regulatory domain.
+ * @REGDOM_SET_BY_DRIVER: a wireless drivers has hinted to the wireless core
+ *      it thinks its knows the regulatory domain we should be in.
+ * @REGDOM_SET_BY_COUNTRY_IE: the wireless core has received an 802.11 country
+ *      information element with regulatory information it thinks we
+ *      should consider.
+ */
+enum reg_set_by {
+        REGDOM_SET_BY_INIT,
+        REGDOM_SET_BY_CORE,
+        REGDOM_SET_BY_USER,
+        REGDOM_SET_BY_DRIVER,
+        REGDOM_SET_BY_COUNTRY_IE,
+};
+
+struct ieee80211_freq_range {
+        u32 start_freq_khz;
+        u32 end_freq_khz;
+        u32 max_bandwidth_khz;
+};
+
+struct ieee80211_power_rule {
+        u32 max_antenna_gain;
+        u32 max_eirp;
+};
+
+struct ieee80211_reg_rule {
+        struct ieee80211_freq_range freq_range;
+        struct ieee80211_power_rule power_rule;
+        u32 flags;
+};
+
+struct ieee80211_regdomain {
+        u32 n_reg_rules;
+        char alpha2[2];
+        struct ieee80211_reg_rule reg_rules[];
+};
+
+#define MHZ_TO_KHZ(freq) (freq * 1000)
+#define KHZ_TO_MHZ(freq) (freq / 1000)
+#define DBI_TO_MBI(gain) (gain * 100)
+#define MBI_TO_DBI(gain) (gain / 100)
+#define DBM_TO_MBM(gain) (gain * 100)
+#define MBM_TO_DBM(gain) (gain / 100)
+
+#define REG_RULE(start, end, bw, gain, eirp, reg_flags) { \
+        .freq_range.start_freq_khz = (start) * 1000, \
+        .freq_range.end_freq_khz = (end) * 1000, \
+        .freq_range.max_bandwidth_khz = (bw) * 1000, \
+        .power_rule.max_antenna_gain = (gain) * 100, \
+        .power_rule.max_eirp = (eirp) * 100, \
+        .flags = reg_flags, \
+        }
+
 /* from net/wireless.h */
 struct wiphy;
 
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index fb9e62211c34..f504e3eca7d3 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -833,6 +833,8 @@ struct ieee80211_hw {
         s8 max_signal;
 };
 
+struct ieee80211_hw *wiphy_to_hw(struct wiphy *wiphy);
+
 /**
  * SET_IEEE80211_DEV - set device for 802.11 hardware
  *
diff --git a/include/net/wireless.h b/include/net/wireless.h
index 1dc8ec3daa2f..e4378cc6bf8e 100644
--- a/include/net/wireless.h
+++ b/include/net/wireless.h
@@ -60,6 +60,7 @@ enum ieee80211_channel_flags {
  * with cfg80211.
  *
  * @center_freq: center frequency in MHz
+ * @max_bandwidth: maximum allowed bandwidth for this channel, in MHz
  * @hw_value: hardware-specific value for the channel
  * @flags: channel flags from &enum ieee80211_channel_flags.
  * @orig_flags: channel flags at registration time, used by regulatory
@@ -73,6 +74,7 @@ enum ieee80211_channel_flags {
 struct ieee80211_channel {
         enum ieee80211_band band;
         u16 center_freq;
+        u8 max_bandwidth;
         u16 hw_value;
         u32 flags;
         int max_antenna_gain;
@@ -178,6 +180,7 @@ struct ieee80211_supported_band {
  * struct wiphy - wireless hardware description
  * @idx: the wiphy index assigned to this item
  * @class_dev: the class device representing /sys/class/ieee80211/<wiphy-name>
+ * @reg_notifier: the driver's regulatory notification callback
  */
 struct wiphy {
         /* assign these fields before you register the wiphy */
@@ -197,6 +200,9 @@ struct wiphy {
 
         struct ieee80211_supported_band *bands[IEEE80211_NUM_BANDS];
 
+        /* Lets us get back the wiphy on the callback */
+        int (*reg_notifier)(struct wiphy *wiphy, enum reg_set_by setby);
+
         /* fields below are read-only, assigned by cfg80211 */
 
         /* the item in /sys/class/ieee80211/ points to this,
@@ -322,6 +328,58 @@ extern int ieee80211_frequency_to_channel(int freq);
  */
 extern struct ieee80211_channel *__ieee80211_get_channel(struct wiphy *wiphy,
                                                          int freq);
+/**
+ * __regulatory_hint - hint to the wireless core a regulatory domain
+ * @wiphy: if a driver is providing the hint this is the driver's very
+ *      own &struct wiphy
+ * @alpha2: the ISO/IEC 3166 alpha2 being claimed the regulatory domain
+ *      should be in. If @rd is set this should be NULL
+ * @rd: a complete regulatory domain, if passed the caller need not worry
+ *      about freeing it
+ *
+ * The Wireless subsystem can use this function to hint to the wireless core
+ * what it believes should be the current regulatory domain by
+ * giving it an ISO/IEC 3166 alpha2 country code it knows its regulatory
+ * domain should be in or by providing a completely build regulatory domain.
+ *
+ * Returns -EALREADY if *a regulatory domain* has already been set. Note that
+ * this could be by another driver. It is safe for drivers to continue if
+ * -EALREADY is returned, if drivers are not capable of world roaming they
+ * should not register more channels than they support. Right now we only
+ * support listening to the first driver hint. If the driver is capable
+ * of world roaming but wants to respect its own EEPROM mappings for
+ * specific regulatory domains it should register the @reg_notifier callback
+ * on the &struct wiphy. Returns 0 if the hint went through fine or through an
+ * intersection operation. Otherwise a standard error code is returned.
+ *
+ */
+extern int __regulatory_hint(struct wiphy *wiphy, enum reg_set_by set_by,
+                const char *alpha2, struct ieee80211_regdomain *rd);
+/**
+ * regulatory_hint - driver hint to the wireless core a regulatory domain
+ * @wiphy: the driver's very own &struct wiphy
+ * @alpha2: the ISO/IEC 3166 alpha2 the driver claims its regulatory domain
+ *      should be in. If @rd is set this should be NULL. Note that if you
+ *      set this to NULL you should still set rd->alpha2 to some accepted
+ *      alpha2.
+ * @rd: a complete regulatory domain provided by the driver. If passed
+ *      the driver does not need to worry about freeing it.
+ *
+ * Wireless drivers can use this function to hint to the wireless core
+ * what it believes should be the current regulatory domain by
+ * giving it an ISO/IEC 3166 alpha2 country code it knows its regulatory
+ * domain should be in or by providing a completely build regulatory domain.
+ * If the driver provides an ISO/IEC 3166 alpha2 userspace will be queried
+ * for a regulatory domain structure for the respective country. If
+ * a regulatory domain is build and passed you should set the alpha2
+ * if possible, otherwise set it to the special value of "99" which tells
+ * the wireless core it is unknown. If you pass a built regulatory domain
+ * and we return non zero you are in charge of kfree()'ing the structure.
+ *
+ * See __regulatory_hint() documentation for possible return values.
+ */
+extern int regulatory_hint(struct wiphy *wiphy,
+                const char *alpha2, struct ieee80211_regdomain *rd);
 
 /**
  * ieee80211_get_channel - get channel struct from wiphy for specified frequency