diff options
| author | Lorenzo Bianconi <lorenzo@kernel.org> | 2021-10-23 12:10:50 +0300 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2021-11-19 11:38:49 +0300 |
| commit | bc2dfc02836b1133d1bf4d22aa13d48ac98eabef (patch) | |
| tree | b872b25469549398e7f3c3d6e45fcee08722a54c /net/wireless/nl80211.c | |
| parent | 3b1abcf1289466eca4c46db8b55c06422f0abf34 (diff) | |
| download | linux-bc2dfc02836b1133d1bf4d22aa13d48ac98eabef.tar.xz | |
cfg80211: implement APIs for dedicated radar detection HW
If a dedicated (off-channel) radar detection hardware (chain)
is available in the hardware/driver, allow this to be used by
calling the NL80211_CMD_RADAR_DETECT command with a new flag
attribute requesting off-channel radar detection is used.
Offchannel CAC (channel availability check) avoids the CAC
downtime when switching to a radar channel or when turning on
the AP.
Drivers advertise support for this using the new feature flag
NL80211_EXT_FEATURE_RADAR_OFFCHAN.
Tested-by: Evelyn Tsai <evelyn.tsai@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/7468e291ef5d05d692c1738d25b8f778d8ea5c3f.1634979655.git.lorenzo@kernel.org
Link: https://lore.kernel.org/r/1e60e60fef00e14401adae81c3d49f3e5f307537.1634979655.git.lorenzo@kernel.org
Link: https://lore.kernel.org/r/85fa50f57fc3adb2934c8d9ca0be30394de6b7e8.1634979655.git.lorenzo@kernel.org
Link: https://lore.kernel.org/r/4b6c08671ad59aae0ac46fc94c02f31b1610eb72.1634979655.git.lorenzo@kernel.org
Link: https://lore.kernel.org/r/241849ccaf2c228873c6f8495bf87b19159ba458.1634979655.git.lorenzo@kernel.org
[remove offchan_mutex, fix cfg80211_stop_offchan_radar_detection(),
remove gfp_t argument, fix documentation, fix tracing]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless/nl80211.c')
| -rw-r--r-- | net/wireless/nl80211.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index a27b3b5fa210..83a1ba96e172 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -776,6 +776,7 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = { [NL80211_ATTR_MBSSID_CONFIG] = NLA_POLICY_NESTED(nl80211_mbssid_config_policy), [NL80211_ATTR_MBSSID_ELEMS] = { .type = NLA_NESTED }, + [NL80211_ATTR_RADAR_OFFCHAN] = { .type = NLA_FLAG }, }; /* policy for the key attributes */ @@ -9284,12 +9285,6 @@ static int nl80211_start_radar_detection(struct sk_buff *skb, if (err) return err; - if (netif_carrier_ok(dev)) - return -EBUSY; - - if (wdev->cac_started) - return -EBUSY; - err = cfg80211_chandef_dfs_required(wiphy, &chandef, wdev->iftype); if (err < 0) return err; @@ -9300,6 +9295,16 @@ static int nl80211_start_radar_detection(struct sk_buff *skb, if (!cfg80211_chandef_dfs_usable(wiphy, &chandef)) return -EINVAL; + if (nla_get_flag(info->attrs[NL80211_ATTR_RADAR_OFFCHAN])) + return cfg80211_start_offchan_radar_detection(rdev, wdev, + &chandef); + + if (netif_carrier_ok(dev)) + return -EBUSY; + + if (wdev->cac_started) + return -EBUSY; + /* CAC start is offloaded to HW and can't be started manually */ if (wiphy_ext_feature_isset(wiphy, NL80211_EXT_FEATURE_DFS_OFFLOAD)) return -EOPNOTSUPP; |