wifi: cfg80211/mac80211: Add support to get radio index

Currently, per-radio attributes are set on per-phy basis, i.e., all the
radios present in a wiphy will take attributes values sent from user. But
each radio in a wiphy can get different values from userspace based on
its requirement.

To extend support to set per-radio attributes, add support to get radio
index from userspace. Add an NL attribute - NL80211_ATTR_WIPHY_RADIO_INDEX,
to get user specified radio index for which attributes should be changed.
Pass this to individual drivers, so that the drivers can use this radio
index to change per-radio attributes when necessary. Currently, per-radio
attributes identified are:
NL80211_ATTR_WIPHY_TX_POWER_LEVEL
NL80211_ATTR_WIPHY_ANTENNA_TX
NL80211_ATTR_WIPHY_ANTENNA_RX
NL80211_ATTR_WIPHY_RETRY_SHORT
NL80211_ATTR_WIPHY_RETRY_LONG
NL80211_ATTR_WIPHY_FRAG_THRESHOLD
NL80211_ATTR_WIPHY_RTS_THRESHOLD
NL80211_ATTR_WIPHY_COVERAGE_CLASS
NL80211_ATTR_TXQ_LIMIT
NL80211_ATTR_TXQ_MEMORY_LIMIT
NL80211_ATTR_TXQ_QUANTUM

By default, the radio index is set to -1. This means the attribute should
be treated as a global configuration. If the user has not specified any
index, then the radio index passed to individual drivers would be -1. This
would indicate that the attribute applies to all radios in that wiphy.

Signed-off-by: Roopni Devanathan <quic_rdevanat@quicinc.com>
Link: https://patch.msgid.link/20250615082312.619639-2-quic_rdevanat@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

3 files changed, 29 insertions, 10 deletions

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index eec066f4738a..ffd9564fc840 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -4853,12 +4853,14 @@ struct cfg80211_ops {
 	int	(*set_mcast_rate)(struct wiphy *wiphy, struct net_device *dev,
 				  int rate[NUM_NL80211_BANDS]);
 
-	int	(*set_wiphy_params)(struct wiphy *wiphy, u32 changed);
+	int	(*set_wiphy_params)(struct wiphy *wiphy, int radio_idx,
+				    u32 changed);
 
 	int	(*set_tx_power)(struct wiphy *wiphy, struct wireless_dev *wdev,
+				int radio_idx,
 				enum nl80211_tx_power_setting type, int mbm);
 	int	(*get_tx_power)(struct wiphy *wiphy, struct wireless_dev *wdev,
-				unsigned int link_id, int *dbm);
+				int radio_idx, unsigned int link_id, int *dbm);
 
 	void	(*rfkill_poll)(struct wiphy *wiphy);
 
@@ -4920,8 +4922,10 @@ struct cfg80211_ops {
 						   struct wireless_dev *wdev,
 						   struct mgmt_frame_regs *upd);
 
-	int	(*set_antenna)(struct wiphy *wiphy, u32 tx_ant, u32 rx_ant);
-	int	(*get_antenna)(struct wiphy *wiphy, u32 *tx_ant, u32 *rx_ant);
+	int	(*set_antenna)(struct wiphy *wiphy, int radio_idx,
+			       u32 tx_ant, u32 rx_ant);
+	int	(*get_antenna)(struct wiphy *wiphy, int radio_idx,
+			       u32 *tx_ant, u32 *rx_ant);
 
 	int	(*sched_scan_start)(struct wiphy *wiphy,
 				struct net_device *dev,
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index fa2325692abf..a0de0da4d79b 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -4517,7 +4517,7 @@ struct ieee80211_ops {
 				enum nl80211_iftype new_type, bool p2p);
 	void (*remove_interface)(struct ieee80211_hw *hw,
 				 struct ieee80211_vif *vif);
-	int (*config)(struct ieee80211_hw *hw, u32 changed);
+	int (*config)(struct ieee80211_hw *hw, int radio_idx, u32 changed);
 	void (*bss_info_changed)(struct ieee80211_hw *hw,
 				 struct ieee80211_vif *vif,
 				 struct ieee80211_bss_conf *info,
@@ -4580,8 +4580,10 @@ struct ieee80211_ops {
 	void (*get_key_seq)(struct ieee80211_hw *hw,
 			    struct ieee80211_key_conf *key,
 			    struct ieee80211_key_seq *seq);
-	int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value);
-	int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value);
+	int (*set_frag_threshold)(struct ieee80211_hw *hw, int radio_idx,
+				  u32 value);
+	int (*set_rts_threshold)(struct ieee80211_hw *hw, int radio_idx,
+				 u32 value);
 	int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 		       struct ieee80211_sta *sta);
 	int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
@@ -4678,7 +4680,8 @@ struct ieee80211_ops {
 	int (*get_survey)(struct ieee80211_hw *hw, int idx,
 		struct survey_info *survey);
 	void (*rfkill_poll)(struct ieee80211_hw *hw);
-	void (*set_coverage_class)(struct ieee80211_hw *hw, s16 coverage_class);
+	void (*set_coverage_class)(struct ieee80211_hw *hw, int radio_idx,
+				   s16 coverage_class);
 #ifdef CONFIG_NL80211_TESTMODE
 	int (*testmode_cmd)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 			    void *data, int len);
@@ -4693,8 +4696,10 @@ struct ieee80211_ops {
 	void (*channel_switch)(struct ieee80211_hw *hw,
 			       struct ieee80211_vif *vif,
 			       struct ieee80211_channel_switch *ch_switch);
-	int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant);
-	int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant);
+	int (*set_antenna)(struct ieee80211_hw *hw, int radio_idx,
+			   u32 tx_ant, u32 rx_ant);
+	int (*get_antenna)(struct ieee80211_hw *hw, int radio_idx,
+			   u32 *tx_ant, u32 *rx_ant);
 
 	int (*remain_on_channel)(struct ieee80211_hw *hw,
 				 struct ieee80211_vif *vif,
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index a289014abe37..2a71149c3065 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -2907,6 +2907,14 @@ enum nl80211_commands {
  *	APs Support". Drivers may set additional flags that they support
  *	in the kernel or device.
  *
+ * @NL80211_ATTR_WIPHY_RADIO_INDEX: (int) Integer attribute denoting the index
+ *	of the radio in interest. Internally a value of -1 is used to
+ *	indicate that the radio id is not given in user-space. This means
+ *	that all the attributes are applicable to all the radios. If there is
+ *	a radio index provided in user-space, the attributes will be
+ *	applicable to that specific radio only. If the radio id is greater
+ *	thank the number of radios, error denoting invalid value is returned.
+ *
  * @NUM_NL80211_ATTR: total number of nl80211_attrs available
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
@@ -3464,6 +3472,8 @@ enum nl80211_attrs {
 
 	NL80211_ATTR_ASSOC_MLD_EXT_CAPA_OPS,
 
+	NL80211_ATTR_WIPHY_RADIO_INDEX,
+
 	/* add attributes here, update the policy in nl80211.c */
 
 	__NL80211_ATTR_AFTER_LAST,