cfg80211: regulatory: allow getting DFS CAC time from userspace

Introduce DFS CAC time as a regd param, configured per REG_RULE and
set per channel in cfg80211. DFS CAC time is close connected with
regulatory database configuration. Instead of using hardcoded values,
get DFS CAC time form regulatory database. Pass DFS CAC time to user
mode (mainly for iw reg get, iw list, iw info). Allow setting DFS CAC
time via CRDA. Add support for internal regulatory database.

Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
[rewrap commit log]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

2 files changed, 15 insertions, 8 deletions

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 8c9ba44fb7cf..bfa9a0c7b2d7 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -151,6 +151,7 @@ enum ieee80211_channel_flags {
  * @dfs_state: current state of this channel. Only relevant if radar is required
  *      on this channel.
  * @dfs_state_entered: timestamp (jiffies) when the dfs state was entered.
+ * @dfs_cac_ms: DFS CAC time in milliseconds, this is valid for DFS channels.
  */
 struct ieee80211_channel {
         enum ieee80211_band band;
@@ -165,6 +166,7 @@ struct ieee80211_channel {
         int orig_mag, orig_mpwr;
         enum nl80211_dfs_state dfs_state;
         unsigned long dfs_state_entered;
+        unsigned int dfs_cac_ms;
 };
 
 /**
diff --git a/include/net/regulatory.h b/include/net/regulatory.h
index b07cdc9fa454..75fc1f5a948d 100644
--- a/include/net/regulatory.h
+++ b/include/net/regulatory.h
@@ -155,6 +155,7 @@ struct ieee80211_reg_rule {
         struct ieee80211_freq_range freq_range;
         struct ieee80211_power_rule power_rule;
         u32 flags;
+        u32 dfs_cac_ms;
 };
 
 struct ieee80211_regdomain {
@@ -172,14 +173,18 @@ struct ieee80211_regdomain {
 #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 = MHZ_TO_KHZ(start), \
-        .freq_range.end_freq_khz = MHZ_TO_KHZ(end),     \
-        .freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw), \
-        .power_rule.max_antenna_gain = DBI_TO_MBI(gain),\
-        .power_rule.max_eirp = DBM_TO_MBM(eirp),        \
-        .flags = reg_flags,                             \
+#define REG_RULE_EXT(start, end, bw, gain, eirp, dfs_cac, reg_flags)    \
+{                                                                       \
+        .freq_range.start_freq_khz = MHZ_TO_KHZ(start),                 \
+        .freq_range.end_freq_khz = MHZ_TO_KHZ(end),                     \
+        .freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw),                 \
+        .power_rule.max_antenna_gain = DBI_TO_MBI(gain),                \
+        .power_rule.max_eirp = DBM_TO_MBM(eirp),                        \
+        .flags = reg_flags,                                             \
+        .dfs_cac_ms = dfs_cac,                                          \
 }
 
+#define REG_RULE(start, end, bw, gain, eirp, reg_flags) \
+        REG_RULE_EXT(start, end, bw, gain, eirp, 0, reg_flags)
+
 #endif