Merge branch 'mlx5-fixes'

Saeed Mahameed says:

====================
mlx5 driver updates and fixes

Changes from V0:
	- Dropped: ("net/mlx5e: Reset link modes upon setting speed to zero")
	- Fixed compilation issue introduced to mlx5_ib driver.
	- Rebased to df637193906a ('Revert "Prevent NUll pointer dereference with two PHYs on cpsw"')

This series has few bug fixes for mlx5 core and ethernet driver.

Eli fixed a wrong static local variable declaration in flow steering API.
Majd added the support of ConnectX-5 PF and VF and added the support
for kernel shutdown pci callback for more robust reboot procedures.
Maor fixed a soft lockup in flow steering.
Rana fixed a wrog speed define in mlx5 EN driver.
I also had the chance to introduce some bug fixes in mlx5 EN mtu
reporting and handling.

For -stable:
	net/mlx5_core: Fix soft lockup in steering error flow
	net/mlx5e: Device's mtu field is u16 and not int
	net/mlx5e: Fix minimum MTU
	net/mlx5e: Use vport MTU rather than physical port MTU
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

11 files changed, 157 insertions, 67 deletions

diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 5acf346e048e..99eb1c1a3b7b 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -671,8 +671,8 @@ static int mlx5_query_hca_port(struct ib_device *ibdev, u8 port,
         struct mlx5_ib_dev *dev = to_mdev(ibdev);
         struct mlx5_core_dev *mdev = dev->mdev;
         struct mlx5_hca_vport_context *rep;
-        int max_mtu;
-        int oper_mtu;
+        u16 max_mtu;
+        u16 oper_mtu;
         int err;
         u8 ib_link_width_oper;
         u8 vl_hw_cap;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
index 879e6276c473..e80ce94b5dcf 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
@@ -609,7 +609,7 @@ enum mlx5e_link_mode {
         MLX5E_100GBASE_KR4       = 22,
         MLX5E_100GBASE_LR4       = 23,
         MLX5E_100BASE_TX         = 24,
-        MLX5E_100BASE_T          = 25,
+        MLX5E_1000BASE_T         = 25,
         MLX5E_10GBASE_T          = 26,
         MLX5E_25GBASE_CR         = 27,
         MLX5E_25GBASE_KR         = 28,
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
index 68834b715f6c..3476ab844634 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
@@ -138,10 +138,10 @@ static const struct {
         [MLX5E_100BASE_TX]   = {
                 .speed      = 100,
         },
-        [MLX5E_100BASE_T]    = {
-                .supported  = SUPPORTED_100baseT_Full,
-                .advertised = ADVERTISED_100baseT_Full,
-                .speed      = 100,
+        [MLX5E_1000BASE_T]    = {
+                .supported  = SUPPORTED_1000baseT_Full,
+                .advertised = ADVERTISED_1000baseT_Full,
+                .speed      = 1000,
         },
         [MLX5E_10GBASE_T]    = {
                 .supported  = SUPPORTED_10000baseT_Full,
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index e0adb604f461..67d548b70e14 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -1404,24 +1404,50 @@ static int mlx5e_refresh_tirs_self_loopback_enable(struct mlx5e_priv *priv)
         return 0;
 }
 
-static int mlx5e_set_dev_port_mtu(struct net_device *netdev)
+static int mlx5e_set_mtu(struct mlx5e_priv *priv, u16 mtu)
 {
-        struct mlx5e_priv *priv = netdev_priv(netdev);
         struct mlx5_core_dev *mdev = priv->mdev;
-        int hw_mtu;
+        u16 hw_mtu = MLX5E_SW2HW_MTU(mtu);
         int err;
 
-        err = mlx5_set_port_mtu(mdev, MLX5E_SW2HW_MTU(netdev->mtu), 1);
+        err = mlx5_set_port_mtu(mdev, hw_mtu, 1);
         if (err)
                 return err;
 
-        mlx5_query_port_oper_mtu(mdev, &hw_mtu, 1);
+        /* Update vport context MTU */
+        mlx5_modify_nic_vport_mtu(mdev, hw_mtu);
+        return 0;
+}
 
-        if (MLX5E_HW2SW_MTU(hw_mtu) != netdev->mtu)
-                netdev_warn(netdev, "%s: Port MTU %d is different than netdev mtu %d\n",
-                            __func__, MLX5E_HW2SW_MTU(hw_mtu), netdev->mtu);
+static void mlx5e_query_mtu(struct mlx5e_priv *priv, u16 *mtu)
+{
+        struct mlx5_core_dev *mdev = priv->mdev;
+        u16 hw_mtu = 0;
+        int err;
 
-        netdev->mtu = MLX5E_HW2SW_MTU(hw_mtu);
+        err = mlx5_query_nic_vport_mtu(mdev, &hw_mtu);
+        if (err || !hw_mtu) /* fallback to port oper mtu */
+                mlx5_query_port_oper_mtu(mdev, &hw_mtu, 1);
+
+        *mtu = MLX5E_HW2SW_MTU(hw_mtu);
+}
+
+static int mlx5e_set_dev_port_mtu(struct net_device *netdev)
+{
+        struct mlx5e_priv *priv = netdev_priv(netdev);
+        u16 mtu;
+        int err;
+
+        err = mlx5e_set_mtu(priv, netdev->mtu);
+        if (err)
+                return err;
+
+        mlx5e_query_mtu(priv, &mtu);
+        if (mtu != netdev->mtu)
+                netdev_warn(netdev, "%s: VPort MTU %d is different than netdev mtu %d\n",
+                            __func__, mtu, netdev->mtu);
+
+        netdev->mtu = mtu;
         return 0;
 }
 
@@ -1999,22 +2025,27 @@ static int mlx5e_set_features(struct net_device *netdev,
         return err;
 }
 
+#define MXL5_HW_MIN_MTU 64
+#define MXL5E_MIN_MTU (MXL5_HW_MIN_MTU + ETH_FCS_LEN)
+
 static int mlx5e_change_mtu(struct net_device *netdev, int new_mtu)
 {
         struct mlx5e_priv *priv = netdev_priv(netdev);
         struct mlx5_core_dev *mdev = priv->mdev;
         bool was_opened;
-        int max_mtu;
+        u16 max_mtu;
+        u16 min_mtu;
         int err = 0;
 
         mlx5_query_port_max_mtu(mdev, &max_mtu, 1);
 
         max_mtu = MLX5E_HW2SW_MTU(max_mtu);
+        min_mtu = MLX5E_HW2SW_MTU(MXL5E_MIN_MTU);
 
-        if (new_mtu > max_mtu) {
+        if (new_mtu > max_mtu || new_mtu < min_mtu) {
                 netdev_err(netdev,
-                           "%s: Bad MTU (%d) > (%d) Max\n",
-                           __func__, new_mtu, max_mtu);
+                           "%s: Bad MTU (%d), valid range is: [%d..%d]\n",
+                           __func__, new_mtu, min_mtu, max_mtu);
                 return -EINVAL;
         }
 
@@ -2602,7 +2633,16 @@ static void mlx5e_destroy_netdev(struct mlx5_core_dev *mdev, void *vpriv)
         schedule_work(&priv->set_rx_mode_work);
         mlx5e_disable_async_events(priv);
         flush_scheduled_work();
-        unregister_netdev(netdev);
+        if (test_bit(MLX5_INTERFACE_STATE_SHUTDOWN, &mdev->intf_state)) {
+                netif_device_detach(netdev);
+                mutex_lock(&priv->state_lock);
+                if (test_bit(MLX5E_STATE_OPENED, &priv->state))
+                        mlx5e_close_locked(netdev);
+                mutex_unlock(&priv->state_lock);
+        } else {
+                unregister_netdev(netdev);
+        }
+
         mlx5e_tc_cleanup(priv);
         mlx5e_vxlan_cleanup(priv);
         mlx5e_destroy_flow_tables(priv);
@@ -2615,7 +2655,9 @@ static void mlx5e_destroy_netdev(struct mlx5_core_dev *mdev, void *vpriv)
         mlx5_core_dealloc_transport_domain(priv->mdev, priv->tdn);
         mlx5_core_dealloc_pd(priv->mdev, priv->pdn);
         mlx5_unmap_free_uar(priv->mdev, &priv->cq_uar);
-        free_netdev(netdev);
+
+        if (!test_bit(MLX5_INTERFACE_STATE_SHUTDOWN, &mdev->intf_state))
+                free_netdev(netdev);
 }
 
 static void *mlx5e_get_netdev(void *vpriv)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
index 5121be4675d1..89cce97d46c6 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
@@ -1065,33 +1065,6 @@ unlock_fg:
         return rule;
 }
 
-static struct mlx5_flow_rule *add_rule_to_auto_fg(struct mlx5_flow_table *ft,
-                                                  u8 match_criteria_enable,
-                                                  u32 *match_criteria,
-                                                  u32 *match_value,
-                                                  u8 action,
-                                                  u32 flow_tag,
-                                                  struct mlx5_flow_destination *dest)
-{
-        struct mlx5_flow_rule *rule;
-        struct mlx5_flow_group *g;
-
-        g = create_autogroup(ft, match_criteria_enable, match_criteria);
-        if (IS_ERR(g))
-                return (void *)g;
-
-        rule = add_rule_fg(g, match_value,
-                           action, flow_tag, dest);
-        if (IS_ERR(rule)) {
-                /* Remove assumes refcount > 0 and autogroup creates a group
-                 * with a refcount = 0.
-                 */
-                tree_get_node(&g->node);
-                tree_remove_node(&g->node);
-        }
-        return rule;
-}
-
 static struct mlx5_flow_rule *
 _mlx5_add_flow_rule(struct mlx5_flow_table *ft,
                     u8 match_criteria_enable,
@@ -1119,8 +1092,23 @@ _mlx5_add_flow_rule(struct mlx5_flow_table *ft,
                                 goto unlock;
                 }
 
-        rule = add_rule_to_auto_fg(ft, match_criteria_enable, match_criteria,
-                                   match_value, action, flow_tag, dest);
+        g = create_autogroup(ft, match_criteria_enable, match_criteria);
+        if (IS_ERR(g)) {
+                rule = (void *)g;
+                goto unlock;
+        }
+
+        rule = add_rule_fg(g, match_value,
+                           action, flow_tag, dest);
+        if (IS_ERR(rule)) {
+                /* Remove assumes refcount > 0 and autogroup creates a group
+                 * with a refcount = 0.
+                 */
+                unlock_ref_node(&ft->node);
+                tree_get_node(&g->node);
+                tree_remove_node(&g->node);
+                return rule;
+        }
 unlock:
         unlock_ref_node(&ft->node);
         return rule;
@@ -1288,7 +1276,7 @@ struct mlx5_flow_namespace *mlx5_get_flow_namespace(struct mlx5_core_dev *dev,
 {
         struct mlx5_flow_root_namespace *root_ns = dev->priv.root_ns;
         int prio;
-        static struct fs_prio *fs_prio;
+        struct fs_prio *fs_prio;
         struct mlx5_flow_namespace *ns;
 
         if (!root_ns)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
index 3f3b2fae4991..6892746fd10d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -966,7 +966,7 @@ static int mlx5_load_one(struct mlx5_core_dev *dev, struct mlx5_priv *priv)
         int err;
 
         mutex_lock(&dev->intf_state_mutex);
-        if (dev->interface_state == MLX5_INTERFACE_STATE_UP) {
+        if (test_bit(MLX5_INTERFACE_STATE_UP, &dev->intf_state)) {
                 dev_warn(&dev->pdev->dev, "%s: interface is up, NOP\n",
                          __func__);
                 goto out;
@@ -1133,7 +1133,8 @@ static int mlx5_load_one(struct mlx5_core_dev *dev, struct mlx5_priv *priv)
         if (err)
                 pr_info("failed request module on %s\n", MLX5_IB_MOD);
 
-        dev->interface_state = MLX5_INTERFACE_STATE_UP;
+        clear_bit(MLX5_INTERFACE_STATE_DOWN, &dev->intf_state);
+        set_bit(MLX5_INTERFACE_STATE_UP, &dev->intf_state);
 out:
         mutex_unlock(&dev->intf_state_mutex);
 
@@ -1207,7 +1208,7 @@ static int mlx5_unload_one(struct mlx5_core_dev *dev, struct mlx5_priv *priv)
         }
 
         mutex_lock(&dev->intf_state_mutex);
-        if (dev->interface_state == MLX5_INTERFACE_STATE_DOWN) {
+        if (test_bit(MLX5_INTERFACE_STATE_DOWN, &dev->intf_state)) {
                 dev_warn(&dev->pdev->dev, "%s: interface is down, NOP\n",
                          __func__);
                 goto out;
@@ -1241,7 +1242,8 @@ static int mlx5_unload_one(struct mlx5_core_dev *dev, struct mlx5_priv *priv)
         mlx5_cmd_cleanup(dev);
 
 out:
-        dev->interface_state = MLX5_INTERFACE_STATE_DOWN;
+        clear_bit(MLX5_INTERFACE_STATE_UP, &dev->intf_state);
+        set_bit(MLX5_INTERFACE_STATE_DOWN, &dev->intf_state);
         mutex_unlock(&dev->intf_state_mutex);
         return err;
 }
@@ -1452,6 +1454,18 @@ static const struct pci_error_handlers mlx5_err_handler = {
         .resume         = mlx5_pci_resume
 };
 
+static void shutdown(struct pci_dev *pdev)
+{
+        struct mlx5_core_dev *dev  = pci_get_drvdata(pdev);
+        struct mlx5_priv *priv = &dev->priv;
+
+        dev_info(&pdev->dev, "Shutdown was called\n");
+        /* Notify mlx5 clients that the kernel is being shut down */
+        set_bit(MLX5_INTERFACE_STATE_SHUTDOWN, &dev->intf_state);
+        mlx5_unload_one(dev, priv);
+        mlx5_pci_disable_device(dev);
+}
+
 static const struct pci_device_id mlx5_core_pci_table[] = {
         { PCI_VDEVICE(MELLANOX, 0x1011) },                      /* Connect-IB */
         { PCI_VDEVICE(MELLANOX, 0x1012), MLX5_PCI_DEV_IS_VF},   /* Connect-IB VF */
@@ -1459,6 +1473,8 @@ static const struct pci_device_id mlx5_core_pci_table[] = {
         { PCI_VDEVICE(MELLANOX, 0x1014), MLX5_PCI_DEV_IS_VF},   /* ConnectX-4 VF */
         { PCI_VDEVICE(MELLANOX, 0x1015) },                      /* ConnectX-4LX */
         { PCI_VDEVICE(MELLANOX, 0x1016), MLX5_PCI_DEV_IS_VF},   /* ConnectX-4LX VF */
+        { PCI_VDEVICE(MELLANOX, 0x1017) },                      /* ConnectX-5 */
+        { PCI_VDEVICE(MELLANOX, 0x1018), MLX5_PCI_DEV_IS_VF},   /* ConnectX-5 VF */
         { 0, }
 };
 
@@ -1469,6 +1485,7 @@ static struct pci_driver mlx5_core_driver = {
         .id_table       = mlx5_core_pci_table,
         .probe          = init_one,
         .remove         = remove_one,
+        .shutdown       = shutdown,
         .err_handler    = &mlx5_err_handler,
         .sriov_configure   = mlx5_core_sriov_configure,
 };
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/port.c b/drivers/net/ethernet/mellanox/mlx5/core/port.c
index ae378c575deb..53cc1e2c693b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/port.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/port.c
@@ -247,8 +247,8 @@ int mlx5_query_port_admin_status(struct mlx5_core_dev *dev,
 }
 EXPORT_SYMBOL_GPL(mlx5_query_port_admin_status);
 
-static void mlx5_query_port_mtu(struct mlx5_core_dev *dev, int *admin_mtu,
-                                int *max_mtu, int *oper_mtu, u8 port)
+static void mlx5_query_port_mtu(struct mlx5_core_dev *dev, u16 *admin_mtu,
+                                u16 *max_mtu, u16 *oper_mtu, u8 port)
 {
         u32 in[MLX5_ST_SZ_DW(pmtu_reg)];
         u32 out[MLX5_ST_SZ_DW(pmtu_reg)];
@@ -268,7 +268,7 @@ static void mlx5_query_port_mtu(struct mlx5_core_dev *dev, int *admin_mtu,
                 *admin_mtu = MLX5_GET(pmtu_reg, out, admin_mtu);
 }
 
-int mlx5_set_port_mtu(struct mlx5_core_dev *dev, int mtu, u8 port)
+int mlx5_set_port_mtu(struct mlx5_core_dev *dev, u16 mtu, u8 port)
 {
         u32 in[MLX5_ST_SZ_DW(pmtu_reg)];
         u32 out[MLX5_ST_SZ_DW(pmtu_reg)];
@@ -283,14 +283,14 @@ int mlx5_set_port_mtu(struct mlx5_core_dev *dev, int mtu, u8 port)
 }
 EXPORT_SYMBOL_GPL(mlx5_set_port_mtu);
 
-void mlx5_query_port_max_mtu(struct mlx5_core_dev *dev, int *max_mtu,
+void mlx5_query_port_max_mtu(struct mlx5_core_dev *dev, u16 *max_mtu,
                              u8 port)
 {
         mlx5_query_port_mtu(dev, NULL, max_mtu, NULL, port);
 }
 EXPORT_SYMBOL_GPL(mlx5_query_port_max_mtu);
 
-void mlx5_query_port_oper_mtu(struct mlx5_core_dev *dev, int *oper_mtu,
+void mlx5_query_port_oper_mtu(struct mlx5_core_dev *dev, u16 *oper_mtu,
                               u8 port)
 {
         mlx5_query_port_mtu(dev, NULL, NULL, oper_mtu, port);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/vport.c b/drivers/net/ethernet/mellanox/mlx5/core/vport.c
index bd518405859e..b69dadcfb897 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/vport.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/vport.c
@@ -196,6 +196,46 @@ int mlx5_modify_nic_vport_mac_address(struct mlx5_core_dev *mdev,
 }
 EXPORT_SYMBOL_GPL(mlx5_modify_nic_vport_mac_address);
 
+int mlx5_query_nic_vport_mtu(struct mlx5_core_dev *mdev, u16 *mtu)
+{
+        int outlen = MLX5_ST_SZ_BYTES(query_nic_vport_context_out);
+        u32 *out;
+        int err;
+
+        out = mlx5_vzalloc(outlen);
+        if (!out)
+                return -ENOMEM;
+
+        err = mlx5_query_nic_vport_context(mdev, 0, out, outlen);
+        if (!err)
+                *mtu = MLX5_GET(query_nic_vport_context_out, out,
+                                nic_vport_context.mtu);
+
+        kvfree(out);
+        return err;
+}
+EXPORT_SYMBOL_GPL(mlx5_query_nic_vport_mtu);
+
+int mlx5_modify_nic_vport_mtu(struct mlx5_core_dev *mdev, u16 mtu)
+{
+        int inlen = MLX5_ST_SZ_BYTES(modify_nic_vport_context_in);
+        void *in;
+        int err;
+
+        in = mlx5_vzalloc(inlen);
+        if (!in)
+                return -ENOMEM;
+
+        MLX5_SET(modify_nic_vport_context_in, in, field_select.mtu, 1);
+        MLX5_SET(modify_nic_vport_context_in, in, nic_vport_context.mtu, mtu);
+
+        err = mlx5_modify_nic_vport_context(mdev, in, inlen);
+
+        kvfree(in);
+        return err;
+}
+EXPORT_SYMBOL_GPL(mlx5_modify_nic_vport_mtu);
+
 int mlx5_query_nic_vport_mac_list(struct mlx5_core_dev *dev,
                                   u32 vport,
                                   enum mlx5_list_type list_type,
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index dcd5ac8d3b14..369c837d40f5 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -519,8 +519,9 @@ enum mlx5_device_state {
 };
 
 enum mlx5_interface_state {
-        MLX5_INTERFACE_STATE_DOWN,
-        MLX5_INTERFACE_STATE_UP,
+        MLX5_INTERFACE_STATE_DOWN = BIT(0),
+        MLX5_INTERFACE_STATE_UP = BIT(1),
+        MLX5_INTERFACE_STATE_SHUTDOWN = BIT(2),
 };
 
 enum mlx5_pci_status {
@@ -544,7 +545,7 @@ struct mlx5_core_dev {
         enum mlx5_device_state  state;
         /* sync interface state */
         struct mutex            intf_state_mutex;
-        enum mlx5_interface_state interface_state;
+        unsigned long           intf_state;
         void                    (*event) (struct mlx5_core_dev *dev,
                                           enum mlx5_dev_event event,
                                           unsigned long param);
diff --git a/include/linux/mlx5/port.h b/include/linux/mlx5/port.h
index a1d145abd4eb..b30250ab7604 100644
--- a/include/linux/mlx5/port.h
+++ b/include/linux/mlx5/port.h
@@ -54,9 +54,9 @@ int mlx5_set_port_admin_status(struct mlx5_core_dev *dev,
 int mlx5_query_port_admin_status(struct mlx5_core_dev *dev,
                                  enum mlx5_port_status *status);
 
-int mlx5_set_port_mtu(struct mlx5_core_dev *dev, int mtu, u8 port);
-void mlx5_query_port_max_mtu(struct mlx5_core_dev *dev, int *max_mtu, u8 port);
-void mlx5_query_port_oper_mtu(struct mlx5_core_dev *dev, int *oper_mtu,
+int mlx5_set_port_mtu(struct mlx5_core_dev *dev, u16 mtu, u8 port);
+void mlx5_query_port_max_mtu(struct mlx5_core_dev *dev, u16 *max_mtu, u8 port);
+void mlx5_query_port_oper_mtu(struct mlx5_core_dev *dev, u16 *oper_mtu,
                               u8 port);
 
 int mlx5_query_port_vl_hw_cap(struct mlx5_core_dev *dev,
diff --git a/include/linux/mlx5/vport.h b/include/linux/mlx5/vport.h
index bd93e6323603..301da4a5e6bf 100644
--- a/include/linux/mlx5/vport.h
+++ b/include/linux/mlx5/vport.h
@@ -45,6 +45,8 @@ int mlx5_query_nic_vport_mac_address(struct mlx5_core_dev *mdev,
                                      u16 vport, u8 *addr);
 int mlx5_modify_nic_vport_mac_address(struct mlx5_core_dev *dev,
                                       u16 vport, u8 *addr);
+int mlx5_query_nic_vport_mtu(struct mlx5_core_dev *mdev, u16 *mtu);
+int mlx5_modify_nic_vport_mtu(struct mlx5_core_dev *mdev, u16 mtu);
 int mlx5_query_nic_vport_system_image_guid(struct mlx5_core_dev *mdev,
                                            u64 *system_image_guid);
 int mlx5_query_nic_vport_node_guid(struct mlx5_core_dev *mdev, u64 *node_guid);