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author | Janusz Dziedzic <janusz.dziedzic@tieto.com> | 2014-02-21 19:46:13 +0100 |
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committer | Johannes Berg <johannes.berg@intel.com> | 2014-02-25 17:32:54 +0100 |
commit | 31559f35c5724976fd975e5d7e90cdb693b8dd27 (patch) | |
tree | 92f0a7e9a2474e730a2461c1e284cb16f77d1b4b /net/wireless/chan.c | |
parent | cfg80211: regulatory: allow getting DFS CAC time from userspace (diff) | |
download | linux-31559f35c5724976fd975e5d7e90cdb693b8dd27.tar.xz linux-31559f35c5724976fd975e5d7e90cdb693b8dd27.zip |
cfg80211: DFS get CAC time from regulatory database
Send Channel Availability Check time as a parameter
of start_radar_detection() callback.
Get CAC time from regulatory database.
Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless/chan.c')
-rw-r--r-- | net/wireless/chan.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/net/wireless/chan.c b/net/wireless/chan.c index 5946450c5406..8659d5cee2a6 100644 --- a/net/wireless/chan.c +++ b/net/wireless/chan.c @@ -490,6 +490,62 @@ static bool cfg80211_chandef_dfs_available(struct wiphy *wiphy, return r; } +static unsigned int cfg80211_get_chans_dfs_cac_time(struct wiphy *wiphy, + u32 center_freq, + u32 bandwidth) +{ + struct ieee80211_channel *c; + u32 start_freq, end_freq, freq; + unsigned int dfs_cac_ms = 0; + + start_freq = cfg80211_get_start_freq(center_freq, bandwidth); + end_freq = cfg80211_get_end_freq(center_freq, bandwidth); + + for (freq = start_freq; freq <= end_freq; freq += 20) { + c = ieee80211_get_channel(wiphy, freq); + if (!c) + return 0; + + if (c->flags & IEEE80211_CHAN_DISABLED) + return 0; + + if (!(c->flags & IEEE80211_CHAN_RADAR)) + continue; + + if (c->dfs_cac_ms > dfs_cac_ms) + dfs_cac_ms = c->dfs_cac_ms; + } + + return dfs_cac_ms; +} + +unsigned int +cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, + const struct cfg80211_chan_def *chandef) +{ + int width; + unsigned int t1 = 0, t2 = 0; + + if (WARN_ON(!cfg80211_chandef_valid(chandef))) + return 0; + + width = cfg80211_chandef_get_width(chandef); + if (width < 0) + return 0; + + t1 = cfg80211_get_chans_dfs_cac_time(wiphy, + chandef->center_freq1, + width); + + if (!chandef->center_freq2) + return t1; + + t2 = cfg80211_get_chans_dfs_cac_time(wiphy, + chandef->center_freq2, + width); + + return max(t1, t2); +} static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy, u32 center_freq, u32 bandwidth, |