1 files changed, 119 insertions, 7 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index 5f15014713bc..8bb05b46db86 100644
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -394,7 +394,7 @@ static int mlx4_how_many_lives_vf(struct mlx4_dev *dev)
         return ret;
 }
 
-static int mlx4_is_slave_active(struct mlx4_dev *dev, int slave)
+int mlx4_is_slave_active(struct mlx4_dev *dev, int slave)
 {
         struct mlx4_priv *priv = mlx4_priv(dev);
         struct mlx4_slave_state *s_slave;
@@ -646,6 +646,99 @@ out:
         return err ? err : count;
 }
 
+enum ibta_mtu {
+        IB_MTU_256  = 1,
+        IB_MTU_512  = 2,
+        IB_MTU_1024 = 3,
+        IB_MTU_2048 = 4,
+        IB_MTU_4096 = 5
+};
+
+static inline int int_to_ibta_mtu(int mtu)
+{
+        switch (mtu) {
+        case 256:  return IB_MTU_256;
+        case 512:  return IB_MTU_512;
+        case 1024: return IB_MTU_1024;
+        case 2048: return IB_MTU_2048;
+        case 4096: return IB_MTU_4096;
+        default: return -1;
+        }
+}
+
+static inline int ibta_mtu_to_int(enum ibta_mtu mtu)
+{
+        switch (mtu) {
+        case IB_MTU_256:  return  256;
+        case IB_MTU_512:  return  512;
+        case IB_MTU_1024: return 1024;
+        case IB_MTU_2048: return 2048;
+        case IB_MTU_4096: return 4096;
+        default: return -1;
+        }
+}
+
+static ssize_t show_port_ib_mtu(struct device *dev,
+                             struct device_attribute *attr,
+                             char *buf)
+{
+        struct mlx4_port_info *info = container_of(attr, struct mlx4_port_info,
+                                                   port_mtu_attr);
+        struct mlx4_dev *mdev = info->dev;
+
+        if (mdev->caps.port_type[info->port] == MLX4_PORT_TYPE_ETH)
+                mlx4_warn(mdev, "port level mtu is only used for IB ports\n");
+
+        sprintf(buf, "%d\n",
+                        ibta_mtu_to_int(mdev->caps.port_ib_mtu[info->port]));
+        return strlen(buf);
+}
+
+static ssize_t set_port_ib_mtu(struct device *dev,
+                             struct device_attribute *attr,
+                             const char *buf, size_t count)
+{
+        struct mlx4_port_info *info = container_of(attr, struct mlx4_port_info,
+                                                   port_mtu_attr);
+        struct mlx4_dev *mdev = info->dev;
+        struct mlx4_priv *priv = mlx4_priv(mdev);
+        int err, port, mtu, ibta_mtu = -1;
+
+        if (mdev->caps.port_type[info->port] == MLX4_PORT_TYPE_ETH) {
+                mlx4_warn(mdev, "port level mtu is only used for IB ports\n");
+                return -EINVAL;
+        }
+
+        err = sscanf(buf, "%d", &mtu);
+        if (err > 0)
+                ibta_mtu = int_to_ibta_mtu(mtu);
+
+        if (err <= 0 || ibta_mtu < 0) {
+                mlx4_err(mdev, "%s is invalid IBTA mtu\n", buf);
+                return -EINVAL;
+        }
+
+        mdev->caps.port_ib_mtu[info->port] = ibta_mtu;
+
+        mlx4_stop_sense(mdev);
+        mutex_lock(&priv->port_mutex);
+        mlx4_unregister_device(mdev);
+        for (port = 1; port <= mdev->caps.num_ports; port++) {
+                mlx4_CLOSE_PORT(mdev, port);
+                err = mlx4_SET_PORT(mdev, port);
+                if (err) {
+                        mlx4_err(mdev, "Failed to set port %d, "
+                                      "aborting\n", port);
+                        goto err_set_port;
+                }
+        }
+        err = mlx4_register_device(mdev);
+err_set_port:
+        mutex_unlock(&priv->port_mutex);
+        mlx4_start_sense(mdev);
+        return err ? err : count;
+}
+
 static int mlx4_load_fw(struct mlx4_dev *dev)
 {
         struct mlx4_priv *priv = mlx4_priv(dev);
@@ -1133,6 +1226,8 @@ static int mlx4_init_hca(struct mlx4_dev *dev)
                         goto err_stop_fw;
                 }
 
+                dev->caps.max_fmr_maps = (1 << (32 - ilog2(dev->caps.num_mpts))) - 1;
+
                 init_hca.log_uar_sz = ilog2(dev->caps.num_uars);
                 init_hca.uar_page_sz = PAGE_SHIFT - 12;
 
@@ -1363,12 +1458,10 @@ static int mlx4_setup_hca(struct mlx4_dev *dev)
                                           "with caps = 0\n", port, err);
                         dev->caps.ib_port_def_cap[port] = ib_port_default_caps;
 
-                        err = mlx4_check_ext_port_caps(dev, port);
-                        if (err)
-                                mlx4_warn(dev, "failed to get port %d extended "
-                                          "port capabilities support info (%d)."
-                                          " Assuming not supported\n",
-                                          port, err);
+                        if (mlx4_is_mfunc(dev))
+                                dev->caps.port_ib_mtu[port] = IB_MTU_2048;
+                        else
+                                dev->caps.port_ib_mtu[port] = IB_MTU_4096;
 
                         err = mlx4_SET_PORT(dev, port);
                         if (err) {
@@ -1524,6 +1617,24 @@ static int mlx4_init_port_info(struct mlx4_dev *dev, int port)
                 info->port = -1;
         }
 
+        sprintf(info->dev_mtu_name, "mlx4_port%d_mtu", port);
+        info->port_mtu_attr.attr.name = info->dev_mtu_name;
+        if (mlx4_is_mfunc(dev))
+                info->port_mtu_attr.attr.mode = S_IRUGO;
+        else {
+                info->port_mtu_attr.attr.mode = S_IRUGO | S_IWUSR;
+                info->port_mtu_attr.store     = set_port_ib_mtu;
+        }
+        info->port_mtu_attr.show      = show_port_ib_mtu;
+        sysfs_attr_init(&info->port_mtu_attr.attr);
+
+        err = device_create_file(&dev->pdev->dev, &info->port_mtu_attr);
+        if (err) {
+                mlx4_err(dev, "Failed to create mtu file for port %d\n", port);
+                device_remove_file(&info->dev->pdev->dev, &info->port_attr);
+                info->port = -1;
+        }
+
         return err;
 }
 
@@ -1533,6 +1644,7 @@ static void mlx4_cleanup_port_info(struct mlx4_port_info *info)
                 return;
 
         device_remove_file(&info->dev->pdev->dev, &info->port_attr);
+        device_remove_file(&info->dev->pdev->dev, &info->port_mtu_attr);
 }
 
 static int mlx4_init_steering(struct mlx4_dev *dev)