iwlwifi: mvm: enable sending HE_AIR_SNIFFER command via debugfs

In order to receive TB (Trigger Based) PPDU in monitor mode,
the Driver must send the HE_AIR_SNIFFER_CONFIG_CMD host command.
Enable that via debugfs.
Signed-off-by: Liad Kaufman <liad.kaufman@intel.com>
Signed-off-by: Ido Yariv <idox.yariv@intel.com>
Signed-off-by: Shaul Triebitz <shaul.triebitz@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h

@@ -99,6 +99,11 @@ enum iwl_data_path_subcmd_ids {
 	 */
 	TLC_MNG_CONFIG_CMD = 0xF,
 
+	/**
+	 * @HE_AIR_SNIFFER_CONFIG_CMD: &struct iwl_he_monitor_cmd
+	 */
+	HE_AIR_SNIFFER_CONFIG_CMD = 0x13,
+
 	/**
 	 * @TLC_MNG_UPDATE_NOTIF: &struct iwl_tlc_update_notif
 	 */

drivers/net/wireless/intel/iwlwifi/fw/api/mac.h

@@ -578,4 +578,18 @@ struct iwl_he_sta_context_cmd {
 	struct iwl_he_backoff_conf trig_based_txf[AC_NUM];
 } __packed; /* STA_CONTEXT_DOT11AX_API_S */
 
+/**
+ * struct iwl_he_monitor_cmd - configure air sniffer for HE
+ * @bssid: the BSSID to sniff for
+ * @reserved1: reserved for dword alignment
+ * @aid: the AID to track on for HE MU
+ * @reserved2: reserved for future use
+ */
+struct iwl_he_monitor_cmd {
+	u8 bssid[6];
+	__le16 reserved1;
+	__le16 aid;
+	u8 reserved2[6];
+} __packed; /* HE_AIR_SNIFFER_CONFIG_CMD_API_S_VER_1 */
+
 #endif /* __iwl_fw_api_mac_h__ */

drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c

@@ -1727,6 +1727,35 @@ iwl_dbgfs_send_echo_cmd_write(struct iwl_mvm *mvm, char *buf,
 	return ret ?: count;
 }
 
+static ssize_t
+iwl_dbgfs_he_sniffer_params_write(struct iwl_mvm *mvm, char *buf,
+			size_t count, loff_t *ppos)
+{
+	struct iwl_he_monitor_cmd he_mon_cmd = {};
+	u32 aid;
+	int ret;
+
+	if (!iwl_mvm_firmware_running(mvm))
+		return -EIO;
+
+	ret = sscanf(buf, "%x %2hhx:%2hhx:%2hhx:%2hhx:%2hhx:%2hhx", &aid,
+		     &he_mon_cmd.bssid[0], &he_mon_cmd.bssid[1],
+		     &he_mon_cmd.bssid[2], &he_mon_cmd.bssid[3],
+		     &he_mon_cmd.bssid[4], &he_mon_cmd.bssid[5]);
+	if (ret != 7)
+		return -EINVAL;
+
+	he_mon_cmd.aid = cpu_to_le16(aid);
+
+	mutex_lock(&mvm->mutex);
+	ret = iwl_mvm_send_cmd_pdu(mvm, iwl_cmd_id(HE_AIR_SNIFFER_CONFIG_CMD,
+						   DATA_PATH_GROUP, 0), 0,
+				   sizeof(he_mon_cmd), &he_mon_cmd);
+	mutex_unlock(&mvm->mutex);
+
+	return ret ?: count;
+}
+
 static ssize_t
 iwl_dbgfs_uapsd_noagg_bssids_read(struct file *file, char __user *user_buf,
 				  size_t count, loff_t *ppos)
@@ -1796,6 +1825,8 @@ MVM_DEBUGFS_READ_WRITE_FILE_OPS(d3_sram, 8);
 MVM_DEBUGFS_READ_FILE_OPS(sar_geo_profile);
 #endif
 
+MVM_DEBUGFS_WRITE_FILE_OPS(he_sniffer_params, 32);
+
 static ssize_t iwl_dbgfs_mem_read(struct file *file, char __user *user_buf,
 				  size_t count, loff_t *ppos)
 {
@@ -1984,6 +2015,7 @@ int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir)
 #ifdef CONFIG_ACPI
 	MVM_DEBUGFS_ADD_FILE(sar_geo_profile, dbgfs_dir, 0400);
 #endif
+	MVM_DEBUGFS_ADD_FILE(he_sniffer_params, mvm->debugfs_dir, 0200);
 
 	if (!debugfs_create_bool("enable_scan_iteration_notif",
 				 0600,