8 files changed, 277 insertions, 51 deletions

diff --git a/drivers/net/mlx4/Makefile b/drivers/net/mlx4/Makefile
index a7a97bf998f..21040a0d81f 100644
--- a/drivers/net/mlx4/Makefile
+++ b/drivers/net/mlx4/Makefile
@@ -1,7 +1,7 @@
 obj-$(CONFIG_MLX4_CORE)         += mlx4_core.o
 
 mlx4_core-y :=  alloc.o catas.o cmd.o cq.o eq.o fw.o icm.o intf.o main.o mcg.o \
-                mr.o pd.o port.o profile.o qp.o reset.o srq.o
+                mr.o pd.o port.o profile.o qp.o reset.o sense.o srq.o
 
 obj-$(CONFIG_MLX4_EN)               += mlx4_en.o
 
diff --git a/drivers/net/mlx4/catas.c b/drivers/net/mlx4/catas.c
index f094ee00c41..aa9674b7f19 100644
--- a/drivers/net/mlx4/catas.c
+++ b/drivers/net/mlx4/catas.c
@@ -42,7 +42,6 @@ enum {
 static DEFINE_SPINLOCK(catas_lock);
 
 static LIST_HEAD(catas_list);
-static struct workqueue_struct *catas_wq;
 static struct work_struct catas_work;
 
 static int internal_err_reset = 1;
@@ -77,7 +76,7 @@ static void poll_catas(unsigned long dev_ptr)
                         list_add(&priv->catas_err.list, &catas_list);
                         spin_unlock(&catas_lock);
 
-                        queue_work(catas_wq, &catas_work);
+                        queue_work(mlx4_wq, &catas_work);
                 }
         } else
                 mod_timer(&priv->catas_err.timer,
@@ -146,18 +145,7 @@ void mlx4_stop_catas_poll(struct mlx4_dev *dev)
         spin_unlock_irq(&catas_lock);
 }
 
-int __init mlx4_catas_init(void)
+void  __init mlx4_catas_init(void)
 {
         INIT_WORK(&catas_work, catas_reset);
-
-        catas_wq = create_singlethread_workqueue("mlx4_err");
-        if (!catas_wq)
-                return -ENOMEM;
-
-        return 0;
-}
-
-void mlx4_catas_cleanup(void)
-{
-        destroy_workqueue(catas_wq);
 }
diff --git a/drivers/net/mlx4/eq.c b/drivers/net/mlx4/eq.c
index 2c19bff7cba..8830dcb92ec 100644
--- a/drivers/net/mlx4/eq.c
+++ b/drivers/net/mlx4/eq.c
@@ -163,6 +163,7 @@ static int mlx4_eq_int(struct mlx4_dev *dev, struct mlx4_eq *eq)
         int cqn;
         int eqes_found = 0;
         int set_ci = 0;
+        int port;
 
         while ((eqe = next_eqe_sw(eq))) {
                 /*
@@ -203,11 +204,16 @@ static int mlx4_eq_int(struct mlx4_dev *dev, struct mlx4_eq *eq)
                         break;
 
                 case MLX4_EVENT_TYPE_PORT_CHANGE:
-                        mlx4_dispatch_event(dev,
-                                            eqe->subtype == MLX4_PORT_CHANGE_SUBTYPE_ACTIVE ?
-                                            MLX4_DEV_EVENT_PORT_UP :
-                                            MLX4_DEV_EVENT_PORT_DOWN,
-                                            be32_to_cpu(eqe->event.port_change.port) >> 28);
+                        port = be32_to_cpu(eqe->event.port_change.port) >> 28;
+                        if (eqe->subtype == MLX4_PORT_CHANGE_SUBTYPE_DOWN) {
+                                mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_DOWN,
+                                                    port);
+                                mlx4_priv(dev)->sense.do_sense_port[port] = 1;
+                        } else {
+                                mlx4_dispatch_event(dev, MLX4_DEV_EVENT_PORT_UP,
+                                                    port);
+                                mlx4_priv(dev)->sense.do_sense_port[port] = 0;
+                        }
                         break;
 
                 case MLX4_EVENT_TYPE_CQ_ERROR:
diff --git a/drivers/net/mlx4/main.c b/drivers/net/mlx4/main.c
index 8480f034684..a66f5b2fd28 100644
--- a/drivers/net/mlx4/main.c
+++ b/drivers/net/mlx4/main.c
@@ -51,6 +51,8 @@ MODULE_DESCRIPTION("Mellanox ConnectX HCA low-level driver");
 MODULE_LICENSE("Dual BSD/GPL");
 MODULE_VERSION(DRV_VERSION);
 
+struct workqueue_struct *mlx4_wq;
+
 #ifdef CONFIG_MLX4_DEBUG
 
 int mlx4_debug_level = 0;
@@ -98,24 +100,23 @@ module_param_named(use_prio, use_prio, bool, 0444);
 MODULE_PARM_DESC(use_prio, "Enable steering by VLAN priority on ETH ports "
                   "(0/1, default 0)");
 
-static int mlx4_check_port_params(struct mlx4_dev *dev,
-                                  enum mlx4_port_type *port_type)
+int mlx4_check_port_params(struct mlx4_dev *dev,
+                           enum mlx4_port_type *port_type)
 {
         int i;
 
         for (i = 0; i < dev->caps.num_ports - 1; i++) {
-                if (port_type[i] != port_type[i+1] &&
-                    !(dev->caps.flags & MLX4_DEV_CAP_FLAG_DPDP)) {
-                        mlx4_err(dev, "Only same port types supported "
-                                 "on this HCA, aborting.\n");
-                        return -EINVAL;
+                if (port_type[i] != port_type[i + 1]) {
+                        if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_DPDP)) {
+                                mlx4_err(dev, "Only same port types supported "
+                                         "on this HCA, aborting.\n");
+                                return -EINVAL;
+                        }
+                        if (port_type[i] == MLX4_PORT_TYPE_ETH &&
+                            port_type[i + 1] == MLX4_PORT_TYPE_IB)
+                                return -EINVAL;
                 }
         }
-        if ((port_type[0] == MLX4_PORT_TYPE_ETH) &&
-            (port_type[1] == MLX4_PORT_TYPE_IB)) {
-                mlx4_err(dev, "eth-ib configuration is not supported.\n");
-                return -EINVAL;
-        }
 
         for (i = 0; i < dev->caps.num_ports; i++) {
                 if (!(port_type[i] & dev->caps.supported_type[i+1])) {
@@ -225,6 +226,9 @@ static int mlx4_dev_cap(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
                         dev->caps.port_type[i] = MLX4_PORT_TYPE_IB;
                 else
                         dev->caps.port_type[i] = MLX4_PORT_TYPE_ETH;
+                dev->caps.possible_type[i] = dev->caps.port_type[i];
+                mlx4_priv(dev)->sense.sense_allowed[i] =
+                        dev->caps.supported_type[i] == MLX4_PORT_TYPE_AUTO;
 
                 if (dev->caps.log_num_macs > dev_cap->log_max_macs[i]) {
                         dev->caps.log_num_macs = dev_cap->log_max_macs[i];
@@ -263,14 +267,16 @@ static int mlx4_dev_cap(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
  * Change the port configuration of the device.
  * Every user of this function must hold the port mutex.
  */
-static int mlx4_change_port_types(struct mlx4_dev *dev,
-                                  enum mlx4_port_type *port_types)
+int mlx4_change_port_types(struct mlx4_dev *dev,
+                           enum mlx4_port_type *port_types)
 {
         int err = 0;
         int change = 0;
         int port;
 
         for (port = 0; port <  dev->caps.num_ports; port++) {
+                /* Change the port type only if the new type is different
+                 * from the current, and not set to Auto */
                 if (port_types[port] != dev->caps.port_type[port + 1]) {
                         change = 1;
                         dev->caps.port_type[port + 1] = port_types[port];
@@ -302,10 +308,17 @@ static ssize_t show_port_type(struct device *dev,
         struct mlx4_port_info *info = container_of(attr, struct mlx4_port_info,
                                                    port_attr);
         struct mlx4_dev *mdev = info->dev;
+        char type[8];
+
+        sprintf(type, "%s",
+                (mdev->caps.port_type[info->port] == MLX4_PORT_TYPE_IB) ?
+                "ib" : "eth");
+        if (mdev->caps.possible_type[info->port] == MLX4_PORT_TYPE_AUTO)
+                sprintf(buf, "auto (%s)\n", type);
+        else
+                sprintf(buf, "%s\n", type);
 
-        return sprintf(buf, "%s\n",
-                       mdev->caps.port_type[info->port] == MLX4_PORT_TYPE_IB ?
-                       "ib" : "eth");
+        return strlen(buf);
 }
 
 static ssize_t set_port_type(struct device *dev,
@@ -317,6 +330,7 @@ static ssize_t set_port_type(struct device *dev,
         struct mlx4_dev *mdev = info->dev;
         struct mlx4_priv *priv = mlx4_priv(mdev);
         enum mlx4_port_type types[MLX4_MAX_PORTS];
+        enum mlx4_port_type new_types[MLX4_MAX_PORTS];
         int i;
         int err = 0;
 
@@ -324,26 +338,56 @@ static ssize_t set_port_type(struct device *dev,
                 info->tmp_type = MLX4_PORT_TYPE_IB;
         else if (!strcmp(buf, "eth\n"))
                 info->tmp_type = MLX4_PORT_TYPE_ETH;
+        else if (!strcmp(buf, "auto\n"))
+                info->tmp_type = MLX4_PORT_TYPE_AUTO;
         else {
                 mlx4_err(mdev, "%s is not supported port type\n", buf);
                 return -EINVAL;
         }
 
+        mlx4_stop_sense(mdev);
         mutex_lock(&priv->port_mutex);
-        for (i = 0; i < mdev->caps.num_ports; i++)
+        /* Possible type is always the one that was delivered */
+        mdev->caps.possible_type[info->port] = info->tmp_type;
+
+        for (i = 0; i < mdev->caps.num_ports; i++) {
                 types[i] = priv->port[i+1].tmp_type ? priv->port[i+1].tmp_type :
-                                        mdev->caps.port_type[i+1];
+                                        mdev->caps.possible_type[i+1];
+                if (types[i] == MLX4_PORT_TYPE_AUTO)
+                        types[i] = mdev->caps.port_type[i+1];
+        }
 
-        err = mlx4_check_port_params(mdev, types);
+        if (!(mdev->caps.flags & MLX4_DEV_CAP_FLAG_DPDP)) {
+                for (i = 1; i <= mdev->caps.num_ports; i++) {
+                        if (mdev->caps.possible_type[i] == MLX4_PORT_TYPE_AUTO) {
+                                mdev->caps.possible_type[i] = mdev->caps.port_type[i];
+                                err = -EINVAL;
+                        }
+                }
+        }
+        if (err) {
+                mlx4_err(mdev, "Auto sensing is not supported on this HCA. "
+                               "Set only 'eth' or 'ib' for both ports "
+                               "(should be the same)\n");
+                goto out;
+        }
+
+        mlx4_do_sense_ports(mdev, new_types, types);
+
+        err = mlx4_check_port_params(mdev, new_types);
         if (err)
                 goto out;
 
-        for (i = 1; i <= mdev->caps.num_ports; i++)
-                priv->port[i].tmp_type = 0;
+        /* We are about to apply the changes after the configuration
+         * was verified, no need to remember the temporary types
+         * any more */
+        for (i = 0; i < mdev->caps.num_ports; i++)
+                priv->port[i + 1].tmp_type = 0;
 
-        err = mlx4_change_port_types(mdev, types);
+        err = mlx4_change_port_types(mdev, new_types);
 
 out:
+        mlx4_start_sense(mdev);
         mutex_unlock(&priv->port_mutex);
         return err ? err : count;
 }
@@ -1117,6 +1161,9 @@ static int __mlx4_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
         if (err)
                 goto err_port;
 
+        mlx4_sense_init(dev);
+        mlx4_start_sense(dev);
+
         pci_set_drvdata(pdev, dev);
 
         return 0;
@@ -1182,6 +1229,7 @@ static void mlx4_remove_one(struct pci_dev *pdev)
         int p;
 
         if (dev) {
+                mlx4_stop_sense(dev);
                 mlx4_unregister_device(dev);
 
                 for (p = 1; p <= dev->caps.num_ports; p++) {
@@ -1266,9 +1314,11 @@ static int __init mlx4_init(void)
         if (mlx4_verify_params())
                 return -EINVAL;
 
-        ret = mlx4_catas_init();
-        if (ret)
-                return ret;
+        mlx4_catas_init();
+
+        mlx4_wq = create_singlethread_workqueue("mlx4");
+        if (!mlx4_wq)
+                return -ENOMEM;
 
         ret = pci_register_driver(&mlx4_driver);
         return ret < 0 ? ret : 0;
@@ -1277,7 +1327,7 @@ static int __init mlx4_init(void)
 static void __exit mlx4_cleanup(void)
 {
         pci_unregister_driver(&mlx4_driver);
-        mlx4_catas_cleanup();
+        destroy_workqueue(mlx4_wq);
 }
 
 module_init(mlx4_init);
diff --git a/drivers/net/mlx4/mlx4.h b/drivers/net/mlx4/mlx4.h
index e0213bad61c..5bd79c2b184 100644
--- a/drivers/net/mlx4/mlx4.h
+++ b/drivers/net/mlx4/mlx4.h
@@ -40,6 +40,7 @@
 #include <linux/mutex.h>
 #include <linux/radix-tree.h>
 #include <linux/timer.h>
+#include <linux/workqueue.h>
 
 #include <linux/mlx4/device.h>
 #include <linux/mlx4/driver.h>
@@ -276,6 +277,13 @@ struct mlx4_port_info {
         struct mlx4_vlan_table  vlan_table;
 };
 
+struct mlx4_sense {
+        struct mlx4_dev         *dev;
+        u8                      do_sense_port[MLX4_MAX_PORTS + 1];
+        u8                      sense_allowed[MLX4_MAX_PORTS + 1];
+        struct delayed_work     sense_poll;
+};
+
 struct mlx4_priv {
         struct mlx4_dev         dev;
 
@@ -305,6 +313,7 @@ struct mlx4_priv {
         struct mlx4_uar         driver_uar;
         void __iomem           *kar;
         struct mlx4_port_info   port[MLX4_MAX_PORTS + 1];
+        struct mlx4_sense       sense;
         struct mutex            port_mutex;
 };
 
@@ -313,6 +322,10 @@ static inline struct mlx4_priv *mlx4_priv(struct mlx4_dev *dev)
         return container_of(dev, struct mlx4_priv, dev);
 }
 
+#define MLX4_SENSE_RANGE        (HZ * 3)
+
+extern struct workqueue_struct *mlx4_wq;
+
 u32 mlx4_bitmap_alloc(struct mlx4_bitmap *bitmap);
 void mlx4_bitmap_free(struct mlx4_bitmap *bitmap, u32 obj);
 u32 mlx4_bitmap_alloc_range(struct mlx4_bitmap *bitmap, int cnt, int align);
@@ -346,8 +359,7 @@ void mlx4_cleanup_mcg_table(struct mlx4_dev *dev);
 
 void mlx4_start_catas_poll(struct mlx4_dev *dev);
 void mlx4_stop_catas_poll(struct mlx4_dev *dev);
-int mlx4_catas_init(void);
-void mlx4_catas_cleanup(void);
+void mlx4_catas_init(void);
 int mlx4_restart_one(struct pci_dev *pdev);
 int mlx4_register_device(struct mlx4_dev *dev);
 void mlx4_unregister_device(struct mlx4_dev *dev);
@@ -379,6 +391,17 @@ void mlx4_srq_event(struct mlx4_dev *dev, u32 srqn, int event_type);
 
 void mlx4_handle_catas_err(struct mlx4_dev *dev);
 
+void mlx4_do_sense_ports(struct mlx4_dev *dev,
+                         enum mlx4_port_type *stype,
+                         enum mlx4_port_type *defaults);
+void mlx4_start_sense(struct mlx4_dev *dev);
+void mlx4_stop_sense(struct mlx4_dev *dev);
+void mlx4_sense_init(struct mlx4_dev *dev);
+int mlx4_check_port_params(struct mlx4_dev *dev,
+                           enum mlx4_port_type *port_type);
+int mlx4_change_port_types(struct mlx4_dev *dev,
+                           enum mlx4_port_type *port_types);
+
 void mlx4_init_mac_table(struct mlx4_dev *dev, struct mlx4_mac_table *table);
 void mlx4_init_vlan_table(struct mlx4_dev *dev, struct mlx4_vlan_table *table);
 
diff --git a/drivers/net/mlx4/sense.c b/drivers/net/mlx4/sense.c
new file mode 100644
index 00000000000..6d5089ecb5a
--- /dev/null
+++ b/drivers/net/mlx4/sense.c
@@ -0,0 +1,156 @@
+/*
+ * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include <linux/errno.h>
+#include <linux/if_ether.h>
+
+#include <linux/mlx4/cmd.h>
+
+#include "mlx4.h"
+
+static int mlx4_SENSE_PORT(struct mlx4_dev *dev, int port,
+                           enum mlx4_port_type *type)
+{
+        u64 out_param;
+        int err = 0;
+
+        err = mlx4_cmd_imm(dev, 0, &out_param, port, 0,
+                           MLX4_CMD_SENSE_PORT, MLX4_CMD_TIME_CLASS_B);
+        if (err) {
+                mlx4_err(dev, "Sense command failed for port: %d\n", port);
+                return err;
+        }
+
+        if (out_param > 2) {
+                mlx4_err(dev, "Sense returned illegal value: 0x%llx\n", out_param);
+                return EINVAL;
+        }
+
+        *type = out_param;
+        return 0;
+}
+
+void mlx4_do_sense_ports(struct mlx4_dev *dev,
+                         enum mlx4_port_type *stype,
+                         enum mlx4_port_type *defaults)
+{
+        struct mlx4_sense *sense = &mlx4_priv(dev)->sense;
+        int err;
+        int i;
+
+        for (i = 1; i <= dev->caps.num_ports; i++) {
+                stype[i - 1] = 0;
+                if (sense->do_sense_port[i] && sense->sense_allowed[i] &&
+                    dev->caps.possible_type[i] == MLX4_PORT_TYPE_AUTO) {
+                        err = mlx4_SENSE_PORT(dev, i, &stype[i - 1]);
+                        if (err)
+                                stype[i - 1] = defaults[i - 1];
+                } else
+                        stype[i - 1] = defaults[i - 1];
+        }
+
+        /*
+         * Adjust port configuration:
+         * If port 1 sensed nothing and port 2 is IB, set both as IB
+         * If port 2 sensed nothing and port 1 is Eth, set both as Eth
+         */
+        if (stype[0] == MLX4_PORT_TYPE_ETH) {
+                for (i = 1; i < dev->caps.num_ports; i++)
+                        stype[i] = stype[i] ? stype[i] : MLX4_PORT_TYPE_ETH;
+        }
+        if (stype[dev->caps.num_ports - 1] == MLX4_PORT_TYPE_IB) {
+                for (i = 0; i < dev->caps.num_ports - 1; i++)
+                        stype[i] = stype[i] ? stype[i] : MLX4_PORT_TYPE_IB;
+        }
+
+        /*
+         * If sensed nothing, remain in current configuration.
+         */
+        for (i = 0; i < dev->caps.num_ports; i++)
+                stype[i] = stype[i] ? stype[i] : defaults[i];
+
+}
+
+static void mlx4_sense_port(struct work_struct *work)
+{
+        struct delayed_work *delay = container_of(work, struct delayed_work, work);
+        struct mlx4_sense *sense = container_of(delay, struct mlx4_sense,
+                                                sense_poll);
+        struct mlx4_dev *dev = sense->dev;
+        struct mlx4_priv *priv = mlx4_priv(dev);
+        enum mlx4_port_type stype[MLX4_MAX_PORTS];
+
+        mutex_lock(&priv->port_mutex);
+        mlx4_do_sense_ports(dev, stype, &dev->caps.port_type[1]);
+
+        if (mlx4_check_port_params(dev, stype))
+                goto sense_again;
+
+        if (mlx4_change_port_types(dev, stype))
+                mlx4_err(dev, "Failed to change port_types\n");
+
+sense_again:
+        mutex_unlock(&priv->port_mutex);
+        queue_delayed_work(mlx4_wq , &sense->sense_poll,
+                           round_jiffies_relative(MLX4_SENSE_RANGE));
+}
+
+void mlx4_start_sense(struct mlx4_dev *dev)
+{
+        struct mlx4_priv *priv = mlx4_priv(dev);
+        struct mlx4_sense *sense = &priv->sense;
+
+        if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_DPDP))
+                return;
+
+        queue_delayed_work(mlx4_wq , &sense->sense_poll,
+                           round_jiffies_relative(MLX4_SENSE_RANGE));
+}
+
+void mlx4_stop_sense(struct mlx4_dev *dev)
+{
+        cancel_delayed_work_sync(&mlx4_priv(dev)->sense.sense_poll);
+}
+
+void  mlx4_sense_init(struct mlx4_dev *dev)
+{
+        struct mlx4_priv *priv = mlx4_priv(dev);
+        struct mlx4_sense *sense = &priv->sense;
+        int port;
+
+        sense->dev = dev;
+        for (port = 1; port <= dev->caps.num_ports; port++)
+                sense->do_sense_port[port] = 1;
+
+        INIT_DELAYED_WORK_DEFERRABLE(&sense->sense_poll, mlx4_sense_port);
+}
diff --git a/include/linux/mlx4/cmd.h b/include/linux/mlx4/cmd.h
index cf9c679ab38..0f82293a82e 100644
--- a/include/linux/mlx4/cmd.h
+++ b/include/linux/mlx4/cmd.h
@@ -55,6 +55,7 @@ enum {
         MLX4_CMD_CLOSE_PORT      = 0xa,
         MLX4_CMD_QUERY_HCA       = 0xb,
         MLX4_CMD_QUERY_PORT      = 0x43,
+        MLX4_CMD_SENSE_PORT      = 0x4d,
         MLX4_CMD_SET_PORT        = 0xc,
         MLX4_CMD_ACCESS_DDR      = 0x2e,
         MLX4_CMD_MAP_ICM         = 0xffa,
diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index 8f659cc2996..3aff8a6a389 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -155,8 +155,9 @@ enum mlx4_qp_region {
 };
 
 enum mlx4_port_type {
-        MLX4_PORT_TYPE_IB       = 1 << 0,
-        MLX4_PORT_TYPE_ETH      = 1 << 1,
+        MLX4_PORT_TYPE_IB       = 1,
+        MLX4_PORT_TYPE_ETH      = 2,
+        MLX4_PORT_TYPE_AUTO     = 3
 };
 
 enum mlx4_special_vlan_idx {
@@ -237,6 +238,7 @@ struct mlx4_caps {
         enum mlx4_port_type     port_type[MLX4_MAX_PORTS + 1];
         u8                      supported_type[MLX4_MAX_PORTS + 1];
         u32                     port_mask;
+        enum mlx4_port_type     possible_type[MLX4_MAX_PORTS + 1];
 };
 
 struct mlx4_buf_list {