drivers: wifi: Add support for keepalive

To handle interoperability issue with few APs, add a feature to keep sending keepalive frames periodically to avoid AP disconnecting the STA. This is disabled by default to avoid unnecessary power consumption as it's only seen with few old APs. Signed-off-by: Chaitanya Tata <[email protected]>
karun2796 · Aug 7, 2024 · eb73df6 · eb73df6
1 parent 2dc2270
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diff --git a/drivers/wifi/nrf700x/Kconfig b/drivers/wifi/nrf700x/Kconfig
@@ -511,3 +511,21 @@ config NET_MGMT_EVENT_QUEUE_SIZE
 	# Doing interface down and up even with delay puts a lot of events in the queue
 	default 16
 endif
+
+config NRF_WIFI_FEAT_KEEPALIVE
+	bool "Enable Wi-Fi keepalive feature"
+	depends on NRF700X_STA_MODE
+	help
+		Enable Wi-Fi keepalive feature to keep the connection alive by sending
+		keepalive packets to the AP. Primarily intended to interoperate with APs
+		that disconnect idle clients without any explicit checks. Slightly increases
+		power consumption.
+
+if NRF_WIFI_FEAT_KEEPALIVE
+config NRF_WIFI_KEEPALIVE_PERIOD_S
+	int "Keepalive period in seconds"
+	range 30 3600
+	default 60
+	help
+		Keepalive period in seconds to send keepalive packets to the AP.
+endif
diff --git a/drivers/wifi/nrf700x/osal/fw_if/umac_if/src/cmd.c b/drivers/wifi/nrf700x/osal/fw_if/umac_if/src/cmd.c
@@ -158,6 +158,14 @@ enum nrf_wifi_status umac_cmd_init(struct nrf_wifi_fmac_dev_ctx *fmac_dev_ctx,
 	nrf_wifi_osal_log_info(fmac_dev_ctx->fpriv->opriv,
 			       "Management buffer offload enabled\n");
 #endif /* CONFIG_NRF_WIFI_MGMT_BUFF_OFFLOAD */
+#ifdef CONFIG_NRF_WIFI_FEAT_KEEPALIVE
+	umac_cmd_data->keep_alive_enable = KEEP_ALIVE_ENABLED;
+	umac_cmd_data->keep_alive_period = CONFIG_NRF_WIFI_KEEPALIVE_PERIOD_S;
+	nrf_wifi_osal_log_dbg(fmac_dev_ctx->fpriv->opriv,
+			       "Keepalive enabled with period %d\n",
+				   umac_cmd_data->keepalive_period);
+#endif /* CONFIG_NRF_WIFI_FEAT_KEEPALIVE */
+
 #ifndef CONFIG_NRF700X_RADIO_TEST
 	nrf_wifi_osal_mem_cpy(fmac_dev_ctx->fpriv->opriv,
 			      umac_cmd_data->rx_buf_pools,