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author | John W. Linville <linville@tuxdriver.com> | 2014-03-21 19:02:04 +0100 |
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committer | John W. Linville <linville@tuxdriver.com> | 2014-03-21 19:02:04 +0100 |
commit | 49c0ca17ee8dd3530f688052d4eb2ae6d3e55119 (patch) | |
tree | 251a4c566723b60505234a18ed864763ad0d0506 /net/wireless/chan.c | |
parent | Merge branch 'bcmgenet-next' (diff) | |
parent | brcmfmac: fallback to mimo_bw_cap for older firmwares (diff) | |
download | linux-49c0ca17ee8dd3530f688052d4eb2ae6d3e55119.tar.xz linux-49c0ca17ee8dd3530f688052d4eb2ae6d3e55119.zip |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
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 cd10c1985074..9c9501a35fb5 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, |