i40e: missing priorities for any QoS traffic

This patch fixes reading f/w LLDP agent status at DCB init time.
It's done by removing direct NVM reading in i40e_update_dcb_config()
and checking whether f/w LLDP agent is disabled via
I40E_FLAG_DISABLE_FW_LLDP flag in i40e_init_pf_dcb(). The function
i40e_update_dcb_config() in i40e_main.c is a temporary solution which
will be later renamed to i40e_init_dcb() in the i40e_dcb module. Also
logging was extended to make visible if f/w LLDP agent is running or not
and always log a message when DCB was not initialized. Without this
patch for new f/w versions f/w LLDP agent status was always read
from NVM as disabled and DCB initialization failed without
clear reason in logs.

Signed-off-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index eee4dbf..6a10f9f 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -6410,6 +6410,50 @@ static int i40e_resume_port_tx(struct i40e_pf *pf)
 }
 
 /**
+ * i40e_update_dcb_config
+ * @hw: pointer to the HW struct
+ * @enable_mib_change: enable MIB change event
+ *
+ * Update DCB configuration from the firmware
+ **/
+static enum i40e_status_code
+i40e_update_dcb_config(struct i40e_hw *hw, bool enable_mib_change)
+{
+       struct i40e_lldp_variables lldp_cfg;
+       i40e_status ret;
+
+       if (!hw->func_caps.dcb)
+               return I40E_NOT_SUPPORTED;
+
+       /* Read LLDP NVM area */
+       ret = i40e_read_lldp_cfg(hw, &lldp_cfg);
+       if (ret)
+               return I40E_ERR_NOT_READY;
+
+       /* Get DCBX status */
+       ret = i40e_get_dcbx_status(hw, &hw->dcbx_status);
+       if (ret)
+               return ret;
+
+       /* Check the DCBX Status */
+       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;
+       } else if (hw->dcbx_status == I40E_DCBX_STATUS_DISABLED) {
+               return I40E_ERR_NOT_READY;
+       }
+
+       /* Configure the LLDP MIB change event */
+       if (enable_mib_change)
+               ret = i40e_aq_cfg_lldp_mib_change_event(hw, true, NULL);
+
+       return ret;
+}
+
+/**
  * i40e_init_pf_dcb - Initialize DCB configuration
  * @pf: PF being configured
  *
@@ -6425,11 +6469,13 @@ static int i40e_init_pf_dcb(struct i40e_pf *pf)
         * Also do not enable DCBx if FW LLDP agent is disabled
         */
        if ((pf->hw_features & I40E_HW_NO_DCB_SUPPORT) ||
-           (pf->flags & I40E_FLAG_DISABLE_FW_LLDP))
+           (pf->flags & I40E_FLAG_DISABLE_FW_LLDP)) {
+               dev_info(&pf->pdev->dev, "DCB is not supported or FW LLDP is disabled\n");
+               err = I40E_NOT_SUPPORTED;
                goto out;
+       }
 
-       /* Get the initial DCB configuration */
-       err = i40e_init_dcb(hw, true);
+       err = i40e_update_dcb_config(hw, true);
        if (!err) {
                /* Device/Function is not DCBX capable */
                if ((!hw->func_caps.dcb) ||
@@ -14401,6 +14447,11 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
        pci_set_drvdata(pdev, pf);
        pci_save_state(pdev);
 
+       dev_info(&pdev->dev,
+                (pf->flags & I40E_FLAG_DISABLE_FW_LLDP) ?
+                       "FW LLDP is disabled\n" :
+                       "FW LLDP is enabled\n");
+
        /* Enable FW to write default DCB config on link-up */
        i40e_aq_set_dcb_parameters(hw, true, NULL);