wifi: nl80211: add a command to enable/disable HW timestamping

Add a command to enable and disable HW timestamping of TM and FTM
frames. HW timestamping can be enabled for a specific mac address
or for all addresses.

The low level driver will indicate how many peers HW timestamping
can be enabled concurrently, and this information will be passed
to userspace.

Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230301115906.05678d7b1c17.Iccc08869ea8156f1c71a3111a47f86dd56234bd0@changeid
[switch to needing netdev UP, minor edits]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 03b911abd772..f0da61c6ec4b 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -828,6 +828,18 @@ struct cfg80211_fils_aad {
 };
 
 /**
+ * struct cfg80211_set_hw_timestamp - enable/disable HW timestamping
+ * @macaddr: peer MAC address. NULL to enable/disable HW timestamping for all
+ *	addresses.
+ * @enable: if set, enable HW timestamping for the specified MAC address.
+ *	Otherwise disable HW timestamping for the specified MAC address.
+ */
+struct cfg80211_set_hw_timestamp {
+	const u8 *macaddr;
+	bool enable;
+};
+
+/**
  * cfg80211_get_chandef_type - return old channel type from chandef
  * @chandef: the channel definition
  *
@@ -4330,6 +4342,8 @@ struct mgmt_frame_regs {
  * @add_link_station: Add a link to a station.
  * @mod_link_station: Modify a link of a station.
  * @del_link_station: Remove a link of a station.
+ *
+ * @set_hw_timestamp: Enable/disable HW timestamping of TM/FTM frames.
  */
 struct cfg80211_ops {
 	int	(*suspend)(struct wiphy *wiphy, struct cfg80211_wowlan *wow);
@@ -4683,6 +4697,8 @@ struct cfg80211_ops {
 				    struct link_station_parameters *params);
 	int	(*del_link_station)(struct wiphy *wiphy, struct net_device *dev,
 				    struct link_station_del_parameters *params);
+	int	(*set_hw_timestamp)(struct wiphy *wiphy, struct net_device *dev,
+				    struct cfg80211_set_hw_timestamp *hwts);
 };
 
 /*
@@ -5139,6 +5155,8 @@ struct wiphy_iftype_akm_suites {
 	int n_akm_suites;
 };
 
+#define CFG80211_HW_TIMESTAMP_ALL_PEERS	0xffff
+
 /**
  * struct wiphy - wireless hardware description
  * @mtx: mutex for the data (structures) of this device
@@ -5348,6 +5366,13 @@ struct wiphy_iftype_akm_suites {
  *	NL80211_MAX_NR_AKM_SUITES in order to avoid compatibility issues with
  *	legacy userspace and maximum allowed value is
  *	CFG80211_MAX_NUM_AKM_SUITES.
+ *
+ * @hw_timestamp_max_peers: maximum number of peers that the driver supports
+ *	enabling HW timestamping for concurrently. Setting this field to a
+ *	non-zero value indicates that the driver supports HW timestamping.
+ *	A value of %CFG80211_HW_TIMESTAMP_ALL_PEERS indicates the driver
+ *	supports enabling HW timestamping for all peers (i.e. no need to
+ *	specify a mac address).
  */
 struct wiphy {
 	struct mutex mtx;
@@ -5496,6 +5521,8 @@ struct wiphy {
 	u8 ema_max_profile_periodicity;
 	u16 max_num_akm_suites;
 
+	u16 hw_timestamp_max_peers;
+
 	char priv[] __aligned(NETDEV_ALIGN);
 };