net/tap: add flow control management

A tap netdevice does not support flow control; ensure nothing but
RTE_FC_NONE mode can be set.

Signed-off-by: Pascal Mazon <pascal.mazon@6wind.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/doc/guides/nics/features/tap.ini b/doc/guides/nics/features/tap.ini
index 7f3f4d6..a51712d 100644 (file)
--- a/doc/guides/nics/features/tap.ini
+++ b/doc/guides/nics/features/tap.ini
@@ -14,6 +14,7 @@ Multicast MAC filter = Y
 Speed capabilities   = Y
 Unicast MAC filter   = Y
 Packet type parsing  = Y
+Flow control         = Y
 Other kdrv           = Y
 ARMv7                = Y
 ARMv8                = Y

diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c
index 7b70d62..f8d9cc7 100644 (file)
--- a/drivers/net/tap/rte_eth_tap.c
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -796,6 +796,23 @@ tap_dev_supported_ptypes_get(struct rte_eth_dev *dev __rte_unused)
        return ptypes;
 }
 
+static int
+tap_flow_ctrl_get(struct rte_eth_dev *dev __rte_unused,
+                 struct rte_eth_fc_conf *fc_conf)
+{
+       fc_conf->mode = RTE_FC_NONE;
+       return 0;
+}
+
+static int
+tap_flow_ctrl_set(struct rte_eth_dev *dev __rte_unused,
+                 struct rte_eth_fc_conf *fc_conf)
+{
+       if (fc_conf->mode != RTE_FC_NONE)
+               return -ENOTSUP;
+       return 0;
+}
+
 static const struct eth_dev_ops ops = {
        .dev_start              = tap_dev_start,
        .dev_stop               = tap_dev_stop,
@@ -806,6 +823,8 @@ static const struct eth_dev_ops ops = {
        .tx_queue_setup         = tap_tx_queue_setup,
        .rx_queue_release       = tap_rx_queue_release,
        .tx_queue_release       = tap_tx_queue_release,
+       .flow_ctrl_get          = tap_flow_ctrl_get,
+       .flow_ctrl_set          = tap_flow_ctrl_set,
        .link_update            = tap_link_update,
        .dev_set_link_up        = tap_link_set_up,
        .dev_set_link_down      = tap_link_set_down,