i40e: Allow changing FEC settings on X722 if supported by FW

Starting with API version 1.10 firmware for X722 devices has ability
to change FEC settings in PHY. Code added in this patch allows
changing FEC settings if the capability flag indicates the device
supports this feature.

Signed-off-by: Jaroslaw Gawin <jaroslawx.gawin@intel.com>
Signed-off-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_adminq.c b/drivers/net/ethernet/intel/i40e/i40e_adminq.c
index c897a2863e4f7f35f2dc81c71dddda5573f635b6..593912b176099e7f2d97fa679d966f29b18b1398 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_adminq.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_adminq.c
@@ -541,6 +541,12 @@ static void i40e_set_hw_flags(struct i40e_hw *hw)
                    (aq->api_maj_ver == 1 &&
                     aq->api_min_ver >= I40E_MINOR_VER_GET_LINK_INFO_X722))
                        hw->flags |= I40E_HW_FLAG_AQ_PHY_ACCESS_CAPABLE;
+
+               if (aq->api_maj_ver > 1 ||
+                   (aq->api_maj_ver == 1 &&
+                    aq->api_min_ver >= I40E_MINOR_VER_FW_REQUEST_FEC_X722))
+                       hw->flags |= I40E_HW_FLAG_X722_FEC_REQUEST_CAPABLE;
+
                fallthrough;
        default:
                break;

diff --git a/drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h b/drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h
index c0c8efe42fcec9c578b706464be4b2abdf9ea68d..1e960c3c7ef05164475421acb5dc8810ae48d4f7 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_adminq_cmd.h
@@ -24,6 +24,8 @@
 #define I40E_MINOR_VER_GET_LINK_INFO_X722 0x0009
 /* API version 1.6 for X722 devices adds ability to stop FW LLDP agent */
 #define I40E_MINOR_VER_FW_LLDP_STOPPABLE_X722 0x0006
+/* API version 1.10 for X722 devices adds ability to request FEC encoding */
+#define I40E_MINOR_VER_FW_REQUEST_FEC_X722 0x000A
 
 struct i40e_aq_desc {
        __le16 flags;

diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
index dc1577156bb638315d9d5e6461b3fbbbd0b08fbc..26ba1f3eb2d85a1cd940d2ee8753b484ea75fa7f 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
@@ -891,6 +891,7 @@ static void i40e_get_settings_link_up(struct i40e_hw *hw,
                if (hw_link_info->requested_speeds & I40E_LINK_SPEED_10GB)
                        ethtool_link_ksettings_add_link_mode(ks, advertising,
                                                             10000baseT_Full);
+               i40e_get_settings_link_up_fec(hw_link_info->req_fec_info, ks);
                break;
        case I40E_PHY_TYPE_SGMII:
                ethtool_link_ksettings_add_link_mode(ks, supported, Autoneg);
@@ -1481,12 +1482,16 @@ static int i40e_set_fec_param(struct net_device *netdev,
        struct i40e_pf *pf = np->vsi->back;
        struct i40e_hw *hw = &pf->hw;
        u8 fec_cfg = 0;
-       int err = 0;
 
        if (hw->device_id != I40E_DEV_ID_25G_SFP28 &&
-           hw->device_id != I40E_DEV_ID_25G_B) {
-               err = -EPERM;
-               goto done;
+           hw->device_id != I40E_DEV_ID_25G_B &&
+           hw->device_id != I40E_DEV_ID_KX_X722)
+               return -EPERM;
+
+       if (hw->mac.type == I40E_MAC_X722 &&
+           !(hw->flags & I40E_HW_FLAG_X722_FEC_REQUEST_CAPABLE)) {
+               netdev_err(netdev, "Setting FEC encoding not supported by firmware. Please update the NVM image.\n");
+               return -EOPNOTSUPP;
        }
 
        switch (fecparam->fec) {
@@ -1508,14 +1513,10 @@ static int i40e_set_fec_param(struct net_device *netdev,
        default:
                dev_warn(&pf->pdev->dev, "Unsupported FEC mode: %d",
                         fecparam->fec);
-               err = -EINVAL;
-               goto done;
+               return -EINVAL;
        }
 
-       err = i40e_set_fec_cfg(netdev, fec_cfg);
-
-done:
-       return err;
+       return i40e_set_fec_cfg(netdev, fec_cfg);
 }
 
 static int i40e_nway_reset(struct net_device *netdev)
@@ -4951,8 +4952,7 @@ flags_complete:
                }
        }
 
-       if (((changed_flags & I40E_FLAG_RS_FEC) ||
-            (changed_flags & I40E_FLAG_BASE_R_FEC)) &&
+       if (changed_flags & I40E_FLAG_RS_FEC &&
            pf->hw.device_id != I40E_DEV_ID_25G_SFP28 &&
            pf->hw.device_id != I40E_DEV_ID_25G_B) {
                dev_warn(&pf->pdev->dev,
@@ -4960,6 +4960,15 @@ flags_complete:
                return -EOPNOTSUPP;
        }
 
+       if (changed_flags & I40E_FLAG_BASE_R_FEC &&
+           pf->hw.device_id != I40E_DEV_ID_25G_SFP28 &&
+           pf->hw.device_id != I40E_DEV_ID_25G_B &&
+           pf->hw.device_id != I40E_DEV_ID_KX_X722) {
+               dev_warn(&pf->pdev->dev,
+                        "Device does not support changing FEC configuration\n");
+               return -EOPNOTSUPP;
+       }
+
        /* Process any additional changes needed as a result of flag changes.
         * The changed_flags value reflects the list of bits that were
         * changed in the code above.

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 929c64789119eb1d2f482cc2030bcb4e9fe4e21b..4f8a2154b93fee621edc8ba356d8046412ca1558 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -6622,6 +6622,25 @@ void i40e_print_link_message(struct i40e_vsi *vsi, bool isup)
                        else
                                req_fec = "CL74 FC-FEC/BASE-R";
                }
+               netdev_info(vsi->netdev,
+                           "NIC Link is Up, %sbps Full Duplex, Requested FEC: %s, Negotiated FEC: %s, Autoneg: %s, Flow Control: %s\n",
+                           speed, req_fec, fec, an, fc);
+       } else if (pf->hw.device_id == I40E_DEV_ID_KX_X722) {
+               req_fec = "None";
+               fec = "None";
+               an = "False";
+
+               if (pf->hw.phy.link_info.an_info & I40E_AQ_AN_COMPLETED)
+                       an = "True";
+
+               if (pf->hw.phy.link_info.fec_info &
+                   I40E_AQ_CONFIG_FEC_KR_ENA)
+                       fec = "CL74 FC-FEC/BASE-R";
+
+               if (pf->hw.phy.link_info.req_fec_info &
+                   I40E_AQ_REQUEST_FEC_KR)
+                       req_fec = "CL74 FC-FEC/BASE-R";
+
                netdev_info(vsi->netdev,
                            "NIC Link is Up, %sbps Full Duplex, Requested FEC: %s, Negotiated FEC: %s, Autoneg: %s, Flow Control: %s\n",
                            speed, req_fec, fec, an, fc);

diff --git a/drivers/net/ethernet/intel/i40e/i40e_type.h b/drivers/net/ethernet/intel/i40e/i40e_type.h
index 97d29df65f9e87b93a51b9a6f6d6dcbffa351a86..c0bdc666f557189a053be17cf3006b27b9a64461 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_type.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_type.h
@@ -595,6 +595,7 @@ struct i40e_hw {
 #define I40E_HW_FLAG_FW_LLDP_PERSISTENT     BIT_ULL(5)
 #define I40E_HW_FLAG_AQ_PHY_ACCESS_EXTENDED BIT_ULL(6)
 #define I40E_HW_FLAG_DROP_MODE              BIT_ULL(7)
+#define I40E_HW_FLAG_X722_FEC_REQUEST_CAPABLE BIT_ULL(8)
        u64 flags;
 
        /* Used in set switch config AQ command */