i40e: skip link control as firmware workaround

As firmware does not support any link control from software driver
side, any phy config should be ignored as a workaround. Otherwise
the link might not be up again after binding back to kernel driver.

Signed-off-by: Helin Zhang <helin.zhang@intel.com>

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 684b2ec..4f08d0c 100644 (file)
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -1347,58 +1347,15 @@ i40e_parse_link_speed(uint16_t eth_link_speed)
 }
 
 static int
-i40e_phy_conf_link(struct i40e_hw *hw, uint8_t abilities, uint8_t force_speed)
-{
-       enum i40e_status_code status;
-       struct i40e_aq_get_phy_abilities_resp phy_ab;
-       struct i40e_aq_set_phy_config phy_conf;
-       const uint8_t mask = I40E_AQ_PHY_FLAG_PAUSE_TX |
-                       I40E_AQ_PHY_FLAG_PAUSE_RX |
-                       I40E_AQ_PHY_FLAG_LOW_POWER;
-       const uint8_t advt = I40E_LINK_SPEED_40GB |
-                       I40E_LINK_SPEED_10GB |
-                       I40E_LINK_SPEED_1GB |
-                       I40E_LINK_SPEED_100MB;
-       int ret = -ENOTSUP;
-
-       /* Skip it on 40G interfaces, as a workaround for the link issue */
-       if (i40e_is_40G_device(hw->device_id))
-               return I40E_SUCCESS;
-
-       status = i40e_aq_get_phy_capabilities(hw, false, false, &phy_ab,
-                                             NULL);
-       if (status)
-               return ret;
-
-       memset(&phy_conf, 0, sizeof(phy_conf));
-
-       /* bits 0-2 use the values from get_phy_abilities_resp */
-       abilities &= ~mask;
-       abilities |= phy_ab.abilities & mask;
-
-       /* update ablities and speed */
-       if (abilities & I40E_AQ_PHY_AN_ENABLED)
-               phy_conf.link_speed = advt;
-       else
-               phy_conf.link_speed = force_speed;
-
-       phy_conf.abilities = abilities;
-
-       /* use get_phy_abilities_resp value for the rest */
-       phy_conf.phy_type = phy_ab.phy_type;
-       phy_conf.eee_capability = phy_ab.eee_capability;
-       phy_conf.eeer = phy_ab.eeer_val;
-       phy_conf.low_power_ctrl = phy_ab.d3_lpan;
-
-       PMD_DRV_LOG(DEBUG, "\tCurrent: abilities %x, link_speed %x",
-                   phy_ab.abilities, phy_ab.link_speed);
-       PMD_DRV_LOG(DEBUG, "\tConfig:  abilities %x, link_speed %x",
-                   phy_conf.abilities, phy_conf.link_speed);
-
-       status = i40e_aq_set_phy_config(hw, &phy_conf, NULL);
-       if (status)
-               return ret;
-
+i40e_phy_conf_link(__rte_unused struct i40e_hw *hw,
+                  __rte_unused uint8_t abilities,
+                  __rte_unused uint8_t force_speed)
+{
+       /* Skip any phy config on both 10G and 40G interfaces, as a workaround
+        * for the link control limitation of that all link control should be
+        * handled by firmware. It should follow up if link control will be
+        * opened to software driver in future firmware versions.
+        */
        return I40E_SUCCESS;
 }