Add QCA vendor interface to transport CFR data using netlink events

Add QCA vendor interface to configure the driver which transport mode to
use for sending CFR data to userspace. Currently, relayfs and netlink
event modes are supported.

Signed-off-by: Vamsi Krishna <vamsin@codeaurora.org>

src/common/qca-vendor.h

@@ -512,7 +512,9 @@ enum qca_radiotap_vendor_ids {
  * @QCA_NL80211_VENDOR_SUBCMD_PEER_CFR_CAPTURE_CFG: This command is used to
  *	configure parameters per peer to capture Channel Frequency Response
  *	(CFR) and enable Periodic CFR capture. The attributes for this command
- *	are defined in enum qca_wlan_vendor_peer_cfr_capture_attr.
+ *	are defined in enum qca_wlan_vendor_peer_cfr_capture_attr. This command
+ *	can also be used to send CFR data from the driver to userspace when
+ *	netlink events are used to send CFR data.
  *
  * @QCA_NL80211_VENDOR_SUBCMD_THROUGHPUT_CHANGE_EVENT: Event to indicate changes
  *	in throughput dynamically. The driver estimates the throughput based on
@@ -9039,6 +9041,22 @@ enum qca_wlan_vendor_attr_roam_scan {
 	QCA_WLAN_VENDOR_ATTR_ROAM_SCAN_AFTER_LAST - 1,
 };
 
+/**
+ * enum qca_wlan_vendor_cfr_data_transport_modes - Defines QCA vendor CFR data
+ * transport modes and is used by the attribute
+ * QCA_WLAN_VENDOR_ATTR_PEER_CFR_DATA_TRANSPORT_MODE as a part of the vendor
+ * command QCA_NL80211_VENDOR_SUBCMD_PEER_CFR_CAPTURE_CFG.
+ * @QCA_WLAN_VENDOR_CFR_DATA_RELAY_FS: Use relayfs to send CFR data.
+ * @QCA_WLAN_VENDOR_CFR_DATA_NETLINK_EVENTS: Use netlink events to send CFR
+ * data. The data shall be encapsulated within
+ * QCA_WLAN_VENDOR_ATTR_PEER_CFR_RESP_DATA along with the vendor sub command
+ * QCA_NL80211_VENDOR_SUBCMD_PEER_CFR_CAPTURE_CFG as an asynchronous event.
+ */
+enum qca_wlan_vendor_cfr_data_transport_modes {
+	QCA_WLAN_VENDOR_CFR_DATA_RELAY_FS = 0,
+	QCA_WLAN_VENDOR_CFR_DATA_NETLINK_EVENTS = 1,
+};
+
 /**
  * enum qca_wlan_vendor_cfr_method - QCA vendor CFR methods used by
  * attribute QCA_WLAN_VENDOR_ATTR_PEER_CFR_METHOD as part of vendor
@@ -9229,6 +9247,27 @@ enum qca_wlan_vendor_cfr_capture_type {
  * MAC for CFR capture. This is a bitmask in which each bit represents the
  * corresponding Data frame subtype value per IEEE Std 802.11-2016,
  * 9.2.4.1.3 Type and Subtype subfields. This is for CFR version 2 only.
+ *
+ * @QCA_WLAN_VENDOR_ATTR_PEER_CFR_DATA_TRANSPORT_MODE: Optional (u8)
+ * Userspace can use this attribute to specify the driver about which transport
+ * mode shall be used by the driver to send CFR data to userspace. Uses values
+ * from enum qca_wlan_vendor_cfr_data_transport_modes. When this attribute is
+ * not present, the driver shall use the default transport mechanism which is
+ * QCA_WLAN_VENDOR_CFR_DATA_RELAY_FS.
+ *
+ * @QCA_WLAN_VENDOR_ATTR_PEER_CFR_DATA_RECEIVER_PID: Optional (u32)
+ * Userspace can use this attribute to specify the nl port id of the application
+ * which receives the CFR data and processes it further so that the drivers can
+ * unicast the netlink events to a specific application. Optionally included
+ * when QCA_WLAN_VENDOR_ATTR_PEER_CFR_DATA_TRANSPORT_MODE is set to
+ * QCA_WLAN_VENDOR_CFR_DATA_NETLINK_EVENTS, not required otherwise. The drivers
+ * shall multicast the netlink events when this attribute is not included.
+ *
+ * @QCA_WLAN_VENDOR_ATTR_PEER_CFR_RESP_DATA: Required (NLA_BINARY).
+ * This attribute will be used by the driver to encapsulate and send CFR data
+ * to userspace along with QCA_NL80211_VENDOR_SUBCMD_PEER_CFR_CAPTURE_CFG as an
+ * asynchronous event when the driver is configured to send CFR data using
+ * netlink events with %QCA_WLAN_VENDOR_CFR_DATA_NETLINK_EVENTS.
  */
 enum qca_wlan_vendor_peer_cfr_capture_attr {
 	QCA_WLAN_VENDOR_ATTR_PEER_CFR_CAPTURE_INVALID = 0,
@@ -9257,6 +9296,9 @@ enum qca_wlan_vendor_peer_cfr_capture_attr {
 	QCA_WLAN_VENDOR_ATTR_PEER_CFR_GROUP_MGMT_FILTER = 23,
 	QCA_WLAN_VENDOR_ATTR_PEER_CFR_GROUP_CTRL_FILTER = 24,
 	QCA_WLAN_VENDOR_ATTR_PEER_CFR_GROUP_DATA_FILTER = 25,
+	QCA_WLAN_VENDOR_ATTR_PEER_CFR_DATA_TRANSPORT_MODE = 26,
+	QCA_WLAN_VENDOR_ATTR_PEER_CFR_DATA_RECEIVER_PID = 27,
+	QCA_WLAN_VENDOR_ATTR_PEER_CFR_RESP_DATA = 28,
 
 	/* Keep last */
 	QCA_WLAN_VENDOR_ATTR_PEER_CFR_AFTER_LAST,