[dpdk-dev] [PATCH v3 04/36] net/i40e/base: decouple cfg_lldp_mib_change from init_dcb

[Xiaolong Ye <xiaolong.ye@intel.com>]

There is a need to enable MIB change event, not at the same time as
init_dcb. This patch will serve this requirement.

Modify the i40e_init_dcb to return the correct error when LLDP or DCBX
is not in operational state.

Signed-off-by: Chinh T Cao <chinh.t.cao@intel.com>
Signed-off-by: Xiaolong Ye <xiaolong.ye@intel.com>
---
 drivers/net/i40e/base/i40e_dcb.c | 28 +++++++++++-----------------
 drivers/net/i40e/base/i40e_dcb.h |  3 ++-
 drivers/net/i40e/i40e_ethdev.c   |  4 ++--
 3 files changed, 15 insertions(+), 20 deletions(-)

diff --git a/drivers/net/i40e/base/i40e_dcb.c b/drivers/net/i40e/base/i40e_dcb.c
index a26f82b3a..7cc8c83dc 100644
--- a/drivers/net/i40e/base/i40e_dcb.c
+++ b/drivers/net/i40e/base/i40e_dcb.c
@@ -863,22 +863,23 @@ enum i40e_status_code i40e_get_dcb_config(struct i40e_hw *hw)
 /**
  * i40e_init_dcb
  * @hw: pointer to the hw struct
+ * @enable_mib_change: enable mib change event
  *
  * Update DCB configuration from the Firmware
  **/
-enum i40e_status_code i40e_init_dcb(struct i40e_hw *hw)
+enum i40e_status_code i40e_init_dcb(struct i40e_hw *hw, bool enable_mib_change)
 {
 	enum i40e_status_code ret = I40E_SUCCESS;
 	struct i40e_lldp_variables lldp_cfg;
 	u8 adminstatus = 0;
 
 	if (!hw->func_caps.dcb)
-		return ret;
+		return I40E_NOT_SUPPORTED;
 
 	/* Read LLDP NVM area */
 	ret = i40e_read_lldp_cfg(hw, &lldp_cfg);
 	if (ret)
-		return ret;
+		return I40E_ERR_NOT_READY;
 
 	/* Get the LLDP AdminStatus for the current port */
 	adminstatus = lldp_cfg.adminstatus >> (hw->port * 4);
@@ -887,7 +888,7 @@ enum i40e_status_code i40e_init_dcb(struct i40e_hw *hw)
 	/* LLDP agent disabled */
 	if (!adminstatus) {
 		hw->dcbx_status = I40E_DCBX_STATUS_DISABLED;
-		return ret;
+		return I40E_ERR_NOT_READY;
 	}
 
 	/* Get DCBX status */
@@ -896,26 +897,19 @@ enum i40e_status_code i40e_init_dcb(struct i40e_hw *hw)
 		return ret;
 
 	/* Check the DCBX Status */
-	switch (hw->dcbx_status) {
-	case I40E_DCBX_STATUS_DONE:
-	case I40E_DCBX_STATUS_IN_PROGRESS:
+	if (hw->dcbx_status == I40E_DCBX_STATUS_DONE ||
+	    hw->dcbx_status == I40E_DCBX_STATUS_IN_PROGRESS) {
 		/* Get current DCBX configuration */
 		ret = i40e_get_dcb_config(hw);
 		if (ret)
 			return ret;
-		break;
-	case I40E_DCBX_STATUS_DISABLED:
-		return ret;
-	case I40E_DCBX_STATUS_NOT_STARTED:
-	case I40E_DCBX_STATUS_MULTIPLE_PEERS:
-	default:
-		break;
+	} else if (hw->dcbx_status == I40E_DCBX_STATUS_DISABLED) {
+		return I40E_ERR_NOT_READY;
 	}
 
 	/* Configure the LLDP MIB change event */
-	ret = i40e_aq_cfg_lldp_mib_change_event(hw, true, NULL);
-	if (ret)
-		return ret;
+	if (enable_mib_change)
+		ret = i40e_aq_cfg_lldp_mib_change_event(hw, true, NULL);
 
 	return ret;
 }
diff --git a/drivers/net/i40e/base/i40e_dcb.h b/drivers/net/i40e/base/i40e_dcb.h
index 85b0eed3a..253943308 100644
--- a/drivers/net/i40e/base/i40e_dcb.h
+++ b/drivers/net/i40e/base/i40e_dcb.h
@@ -186,7 +186,8 @@ enum i40e_status_code i40e_aq_get_dcb_config(struct i40e_hw *hw, u8 mib_type,
 					     u8 bridgetype,
 					     struct i40e_dcbx_config *dcbcfg);
 enum i40e_status_code i40e_get_dcb_config(struct i40e_hw *hw);
-enum i40e_status_code i40e_init_dcb(struct i40e_hw *hw);
+enum i40e_status_code i40e_init_dcb(struct i40e_hw *hw,
+				    bool enable_mib_change);
 enum i40e_status_code i40e_set_dcb_config(struct i40e_hw *hw);
 enum i40e_status_code i40e_dcb_config_to_lldp(u8 *lldpmib, u16 *miblen,
 					      struct i40e_dcbx_config *dcbcfg);
diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 5999c964b..765d9b495 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -11582,7 +11582,7 @@ i40e_dcb_init_configure(struct rte_eth_dev *dev, bool sw_dcb)
 				PMD_INIT_LOG(DEBUG, "Failed to stop lldp");
 		}
 
-		ret = i40e_init_dcb(hw);
+		ret = i40e_init_dcb(hw, true);
 		/* If lldp agent is stopped, the return value from
 		 * i40e_init_dcb we expect is failure with I40E_AQ_RC_EPERM
 		 * adminq status. Otherwise, it should return success.
@@ -11630,7 +11630,7 @@ i40e_dcb_init_configure(struct rte_eth_dev *dev, bool sw_dcb)
 		if (ret != I40E_SUCCESS)
 			PMD_INIT_LOG(DEBUG, "Failed to start lldp");
 
-		ret = i40e_init_dcb(hw);
+		ret = i40e_init_dcb(hw, true);
 		if (!ret) {
 			if (hw->dcbx_status == I40E_DCBX_STATUS_DISABLED) {
 				PMD_INIT_LOG(ERR,
-- 
2.17.1