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[mac80211-next,2/4] cfg80211: introduce NL80211_ATTR_RADAR_OFFCHAN netlink attribute

Message ID c3adad927a5d32003fd969edc32c566869673a34.1634644309.git.lorenzo@kernel.org (mailing list archive)
State Changes Requested
Delegated to: Johannes Berg
Headers show
Series add offchannel radar chain support | expand

Commit Message

Lorenzo Bianconi Oct. 19, 2021, 11:59 a.m. UTC 
Introduce NL80211_ATTR_RADAR_OFFCHAN netlink attribute in order to
configure offchannel radar chain if supported by the underlay driver.

Tested-by: Evelyn Tsai <evelyn.tsai@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 include/uapi/linux/nl80211.h |  6 ++++++
 net/wireless/nl80211.c       | 12 ++++++++++--
 2 files changed, 16 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index eda608b1eb09..96e622777bb2 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -2639,6 +2639,10 @@  enum nl80211_commands {
  *	Mandatory parameter for the transmitting interface to enable MBSSID.
  *	Optional for the non-transmitting interfaces.
  *
+ * @NL80211_ATTR_RADAR_OFFCHAN: Configure dedicated chain available for radar
+ *	detection on some hw. The chain can't be used to transmits or receives
+ *	frames. The driver is supposed to implement CAC management in sw or fw.
+ *
  * @NUM_NL80211_ATTR: total number of nl80211_attrs available
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
@@ -3145,6 +3149,8 @@  enum nl80211_attrs {
 	NL80211_ATTR_MBSSID_CONFIG,
 	NL80211_ATTR_MBSSID_ELEMS,
 
+	NL80211_ATTR_RADAR_OFFCHAN,
+
 	/* add attributes here, update the policy in nl80211.c */
 
 	__NL80211_ATTR_AFTER_LAST,
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 3f37e4d5c5d2..a296f180624e 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 */
@@ -9279,10 +9280,12 @@  static int nl80211_start_radar_detection(struct sk_buff *skb,
 	if (err)
 		return err;
 
-	if (netif_carrier_ok(dev))
+	if (!nla_get_flag(info->attrs[NL80211_ATTR_RADAR_OFFCHAN]) &&
+	    netif_carrier_ok(dev))
 		return -EBUSY;
 
-	if (wdev->cac_started)
+	if (!nla_get_flag(info->attrs[NL80211_ATTR_RADAR_OFFCHAN]) &&
+	    wdev->cac_started)
 		return -EBUSY;
 
 	err = cfg80211_chandef_dfs_required(wiphy, &chandef, wdev->iftype);
@@ -9299,6 +9302,11 @@  static int nl80211_start_radar_detection(struct sk_buff *skb,
 	if (wiphy_ext_feature_isset(wiphy, NL80211_EXT_FEATURE_DFS_OFFLOAD))
 		return -EOPNOTSUPP;
 
+	if (nla_get_flag(info->attrs[NL80211_ATTR_RADAR_OFFCHAN])) {
+		/* offchannel radar detection */
+		return rdev_set_radar_offchan(rdev, &chandef);
+	}
+
 	if (!rdev->ops->start_radar_detection)
 		return -EOPNOTSUPP;