mlx4_core: Adjustments to Flow Steering activation logic for SR-IOV

[cascardo/linux.git] / drivers / net / ethernet / mellanox / mlx4 / main.c

diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index b2acbe7..680d810 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -281,28 +281,6 @@ static int mlx4_dev_cap(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
        dev->caps.max_gso_sz         = dev_cap->max_gso_sz;
        dev->caps.max_rss_tbl_sz     = dev_cap->max_rss_tbl_sz;
 
-       if (dev_cap->flags2 & MLX4_DEV_CAP_FLAG2_FS_EN) {
-               dev->caps.steering_mode = MLX4_STEERING_MODE_DEVICE_MANAGED;
-               dev->caps.num_qp_per_mgm = dev_cap->fs_max_num_qp_per_entry;
-               dev->caps.fs_log_max_ucast_qp_range_size =
-                       dev_cap->fs_log_max_ucast_qp_range_size;
-       } else {
-               if (dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER &&
-                   dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER) {
-                       dev->caps.steering_mode = MLX4_STEERING_MODE_B0;
-               } else {
-                       dev->caps.steering_mode = MLX4_STEERING_MODE_A0;
-
-                       if (dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER ||
-                           dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER)
-                               mlx4_warn(dev, "Must have UC_STEER and MC_STEER flags "
-                                               "set to use B0 steering. Falling back to A0 steering mode.\n");
-               }
-               dev->caps.num_qp_per_mgm = mlx4_get_qp_per_mgm(dev);
-       }
-       mlx4_dbg(dev, "Steering mode is: %s\n",
-                mlx4_steering_mode_str(dev->caps.steering_mode));
-
        /* Sense port always allowed on supported devices for ConnectX-1 and -2 */
        if (mlx4_priv(dev)->pci_dev_data & MLX4_PCI_DEV_FORCE_SENSE_PORT)
                dev->caps.flags |= MLX4_DEV_CAP_FLAG_SENSE_SUPPORT;
@@ -493,6 +471,23 @@ int mlx4_is_slave_active(struct mlx4_dev *dev, int slave)
 }
 EXPORT_SYMBOL(mlx4_is_slave_active);
 
+static void slave_adjust_steering_mode(struct mlx4_dev *dev,
+                                      struct mlx4_dev_cap *dev_cap,
+                                      struct mlx4_init_hca_param *hca_param)
+{
+       dev->caps.steering_mode = hca_param->steering_mode;
+       if (dev->caps.steering_mode == MLX4_STEERING_MODE_DEVICE_MANAGED) {
+               dev->caps.num_qp_per_mgm = dev_cap->fs_max_num_qp_per_entry;
+               dev->caps.fs_log_max_ucast_qp_range_size =
+                       dev_cap->fs_log_max_ucast_qp_range_size;
+       } else
+               dev->caps.num_qp_per_mgm =
+                       4 * ((1 << hca_param->log_mc_entry_sz)/16 - 2);
+
+       mlx4_dbg(dev, "Steering mode is: %s\n",
+                mlx4_steering_mode_str(dev->caps.steering_mode));
+}
+
 static int mlx4_slave_cap(struct mlx4_dev *dev)
 {
        int                        err;
@@ -635,6 +630,8 @@ static int mlx4_slave_cap(struct mlx4_dev *dev)
                dev->caps.cqe_size   = 32;
        }
 
+       slave_adjust_steering_mode(dev, &dev_cap, &hca_param);
+
        return 0;
 
 err_mem:
@@ -1321,6 +1318,34 @@ static void mlx4_parav_master_pf_caps(struct mlx4_dev *dev)
        }
 }
 
+static void choose_steering_mode(struct mlx4_dev *dev,
+                                struct mlx4_dev_cap *dev_cap)
+{
+       if (dev_cap->flags2 & MLX4_DEV_CAP_FLAG2_FS_EN &&
+           (!mlx4_is_mfunc(dev) ||
+            (dev_cap->fs_max_num_qp_per_entry >= (num_vfs + 1)))) {
+               dev->caps.steering_mode = MLX4_STEERING_MODE_DEVICE_MANAGED;
+               dev->caps.num_qp_per_mgm = dev_cap->fs_max_num_qp_per_entry;
+               dev->caps.fs_log_max_ucast_qp_range_size =
+                       dev_cap->fs_log_max_ucast_qp_range_size;
+       } else {
+               if (dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER &&
+                   dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER)
+                       dev->caps.steering_mode = MLX4_STEERING_MODE_B0;
+               else {
+                       dev->caps.steering_mode = MLX4_STEERING_MODE_A0;
+
+                       if (dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER ||
+                           dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER)
+                               mlx4_warn(dev, "Must have both UC_STEER and MC_STEER flags "
+                                         "set to use B0 steering. Falling back to A0 steering mode.\n");
+               }
+               dev->caps.num_qp_per_mgm = mlx4_get_qp_per_mgm(dev);
+       }
+       mlx4_dbg(dev, "Steering mode is: %s\n",
+                mlx4_steering_mode_str(dev->caps.steering_mode));
+}
+
 static int mlx4_init_hca(struct mlx4_dev *dev)
 {
        struct mlx4_priv          *priv = mlx4_priv(dev);
@@ -1360,6 +1385,8 @@ static int mlx4_init_hca(struct mlx4_dev *dev)
                        goto err_stop_fw;
                }
 
+               choose_steering_mode(dev, &dev_cap);
+
                if (mlx4_is_master(dev))
                        mlx4_parav_master_pf_caps(dev);