[RFC PATCH net-next 27/28] net: ethernet: ti: cpsw-proxy-client: add helper to detach virtual ports

[Siddharth Vadapalli]

Add the helper function "detach_virtual_ports()" to release all resources
held by the virtual ports and send the ETHFW_VIRT_PORT_DETACH request for
each virtual port. This notifies EthFw that the virtual ports are unused.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@xxxxxx>
---
 drivers/net/ethernet/ti/cpsw-proxy-client.c | 23 +++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/drivers/net/ethernet/ti/cpsw-proxy-client.c b/drivers/net/ethernet/ti/cpsw-proxy-client.c
index 56311b019376..90be8bb0e37d 100644
--- a/drivers/net/ethernet/ti/cpsw-proxy-client.c
+++ b/drivers/net/ethernet/ti/cpsw-proxy-client.c
@@ -672,6 +672,29 @@ static int allocate_port_resources(struct cpsw_proxy_priv *proxy_priv)
 	return -EIO;
 }
 
+static void detach_virtual_ports(struct cpsw_proxy_priv *proxy_priv)
+{
+	struct cpsw_proxy_req_params *req_p;
+	struct virtual_port *vport;
+	struct message resp_msg;
+	u32 port_id, i;
+	int ret;
+
+	free_port_resources(proxy_priv);
+	for (i = 0; i < proxy_priv->num_virt_ports; i++) {
+		vport = &proxy_priv->virt_ports[i];
+		port_id = vport->port_id;
+		mutex_lock(&proxy_priv->req_params_mutex);
+		req_p = &proxy_priv->req_params;
+		req_p->request_type = ETHFW_VIRT_PORT_DETACH;
+		req_p->token = vport->port_token;
+		ret = send_request_get_response(proxy_priv, &resp_msg);
+		mutex_unlock(&proxy_priv->req_params_mutex);
+		if (ret)
+			dev_err(proxy_priv->dev, "detaching virtual port %u failed\n", port_id);
+	}
+}
+
 static void free_tx_chns(void *data)
 {
 	struct cpsw_proxy_priv *proxy_priv = data;
-- 
2.40.1