From 156f378985819e55431c7d7a09c7764d029ef49f Mon Sep 17 00:00:00 2001 From: Leon Romanovsky Date: Thu, 30 Jul 2020 11:12:33 +0300 Subject: [PATCH] RDMA/mlx5: Simplify multiple else-if cases with switch keyword Improve readability of fs.c by converting multiple else-if constructions to be implemented with switch keyword. Link: https://lore.kernel.org/r/20200730081235.1581127-2-leon@kernel.org Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe --- drivers/infiniband/hw/mlx5/fs.c | 124 +++++++++++++++++++------------- 1 file changed, 75 insertions(+), 49 deletions(-) diff --git a/drivers/infiniband/hw/mlx5/fs.c b/drivers/infiniband/hw/mlx5/fs.c index e9cfb9a2ef41..02d96b9179f5 100644 --- a/drivers/infiniband/hw/mlx5/fs.c +++ b/drivers/infiniband/hw/mlx5/fs.c @@ -767,6 +767,7 @@ static struct mlx5_ib_flow_prio *get_flow_table(struct mlx5_ib_dev *dev, { bool dont_trap = flow_attr->flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP; struct mlx5_flow_namespace *ns = NULL; + enum mlx5_flow_namespace_type fn_type; struct mlx5_ib_flow_prio *prio; struct mlx5_flow_table *ft; int max_table_size; @@ -780,11 +781,9 @@ static struct mlx5_ib_flow_prio *get_flow_table(struct mlx5_ib_dev *dev, log_max_ft_size)); esw_encap = mlx5_eswitch_get_encap_mode(dev->mdev) != DEVLINK_ESWITCH_ENCAP_MODE_NONE; - if (flow_attr->type == IB_FLOW_ATTR_NORMAL) { - enum mlx5_flow_namespace_type fn_type; - - if (flow_is_multicast_only(flow_attr) && - !dont_trap) + switch (flow_attr->type) { + case IB_FLOW_ATTR_NORMAL: + if (flow_is_multicast_only(flow_attr) && !dont_trap) priority = MLX5_IB_FLOW_MCAST_PRIO; else priority = ib_prio_to_core_prio(flow_attr->priority, @@ -797,12 +796,11 @@ static struct mlx5_ib_flow_prio *get_flow_table(struct mlx5_ib_dev *dev, flags |= MLX5_FLOW_TABLE_TUNNEL_EN_DECAP; if (!dev->is_rep && !esw_encap && MLX5_CAP_FLOWTABLE_NIC_RX(dev->mdev, - reformat_l3_tunnel_to_l2)) + reformat_l3_tunnel_to_l2)) flags |= MLX5_FLOW_TABLE_TUNNEL_EN_REFORMAT; } else { - max_table_size = - BIT(MLX5_CAP_FLOWTABLE_NIC_TX(dev->mdev, - log_max_ft_size)); + max_table_size = BIT(MLX5_CAP_FLOWTABLE_NIC_TX( + dev->mdev, log_max_ft_size)); fn_type = MLX5_FLOW_NAMESPACE_EGRESS; prio = &dev->flow_db->egress_prios[priority]; if (!dev->is_rep && !esw_encap && @@ -812,27 +810,31 @@ static struct mlx5_ib_flow_prio *get_flow_table(struct mlx5_ib_dev *dev, ns = mlx5_get_flow_namespace(dev->mdev, fn_type); num_entries = MLX5_FS_MAX_ENTRIES; num_groups = MLX5_FS_MAX_TYPES; - } else if (flow_attr->type == IB_FLOW_ATTR_ALL_DEFAULT || - flow_attr->type == IB_FLOW_ATTR_MC_DEFAULT) { + break; + case IB_FLOW_ATTR_ALL_DEFAULT: + case IB_FLOW_ATTR_MC_DEFAULT: ns = mlx5_get_flow_namespace(dev->mdev, MLX5_FLOW_NAMESPACE_LEFTOVERS); - build_leftovers_ft_param(&priority, - &num_entries, - &num_groups); + build_leftovers_ft_param(&priority, &num_entries, &num_groups); prio = &dev->flow_db->prios[MLX5_IB_FLOW_LEFTOVERS_PRIO]; - } else if (flow_attr->type == IB_FLOW_ATTR_SNIFFER) { + break; + case IB_FLOW_ATTR_SNIFFER: if (!MLX5_CAP_FLOWTABLE(dev->mdev, allow_sniffer_and_nic_rx_shared_tir)) return ERR_PTR(-EOPNOTSUPP); - ns = mlx5_get_flow_namespace(dev->mdev, ft_type == MLX5_IB_FT_RX ? - MLX5_FLOW_NAMESPACE_SNIFFER_RX : - MLX5_FLOW_NAMESPACE_SNIFFER_TX); + ns = mlx5_get_flow_namespace( + dev->mdev, ft_type == MLX5_IB_FT_RX ? + MLX5_FLOW_NAMESPACE_SNIFFER_RX : + MLX5_FLOW_NAMESPACE_SNIFFER_TX); prio = &dev->flow_db->sniffer[ft_type]; priority = 0; num_entries = 1; num_groups = 1; + break; + default: + break; } if (!ns) @@ -1245,19 +1247,22 @@ static struct ib_flow *mlx5_ib_create_flow(struct ib_qp *qp, dst->tir_num = mqp->raw_packet_qp.rq.tirn; } - if (flow_attr->type == IB_FLOW_ATTR_NORMAL) { + switch (flow_attr->type) { + case IB_FLOW_ATTR_NORMAL: underlay_qpn = (mqp->flags & IB_QP_CREATE_SOURCE_QPN) ? mqp->underlay_qpn : 0; handler = _create_flow_rule(dev, ft_prio, flow_attr, dst, underlay_qpn, ucmd); - } else if (flow_attr->type == IB_FLOW_ATTR_ALL_DEFAULT || - flow_attr->type == IB_FLOW_ATTR_MC_DEFAULT) { - handler = create_leftovers_rule(dev, ft_prio, flow_attr, - dst); - } else if (flow_attr->type == IB_FLOW_ATTR_SNIFFER) { + break; + case IB_FLOW_ATTR_ALL_DEFAULT: + case IB_FLOW_ATTR_MC_DEFAULT: + handler = create_leftovers_rule(dev, ft_prio, flow_attr, dst); + break; + case IB_FLOW_ATTR_SNIFFER: handler = create_sniffer_rule(dev, ft_prio, ft_prio_tx, dst); - } else { + break; + default: err = -EINVAL; goto destroy_ft; } @@ -1305,39 +1310,47 @@ _get_flow_table(struct mlx5_ib_dev *dev, esw_encap = mlx5_eswitch_get_encap_mode(dev->mdev) != DEVLINK_ESWITCH_ENCAP_MODE_NONE; - if (fs_matcher->ns_type == MLX5_FLOW_NAMESPACE_BYPASS) { - max_table_size = BIT(MLX5_CAP_FLOWTABLE_NIC_RX(dev->mdev, - log_max_ft_size)); + switch (fs_matcher->ns_type) { + case MLX5_FLOW_NAMESPACE_BYPASS: + max_table_size = BIT( + MLX5_CAP_FLOWTABLE_NIC_RX(dev->mdev, log_max_ft_size)); if (MLX5_CAP_FLOWTABLE_NIC_RX(dev->mdev, decap) && !esw_encap) flags |= MLX5_FLOW_TABLE_TUNNEL_EN_DECAP; if (MLX5_CAP_FLOWTABLE_NIC_RX(dev->mdev, reformat_l3_tunnel_to_l2) && !esw_encap) flags |= MLX5_FLOW_TABLE_TUNNEL_EN_REFORMAT; - } else if (fs_matcher->ns_type == MLX5_FLOW_NAMESPACE_EGRESS) { + break; + case MLX5_FLOW_NAMESPACE_EGRESS: max_table_size = BIT( MLX5_CAP_FLOWTABLE_NIC_TX(dev->mdev, log_max_ft_size)); - if (MLX5_CAP_FLOWTABLE_NIC_TX(dev->mdev, reformat) && !esw_encap) + if (MLX5_CAP_FLOWTABLE_NIC_TX(dev->mdev, reformat) && + !esw_encap) flags |= MLX5_FLOW_TABLE_TUNNEL_EN_REFORMAT; - } else if (fs_matcher->ns_type == MLX5_FLOW_NAMESPACE_FDB) { + break; + case MLX5_FLOW_NAMESPACE_FDB: max_table_size = BIT( MLX5_CAP_ESW_FLOWTABLE_FDB(dev->mdev, log_max_ft_size)); if (MLX5_CAP_ESW_FLOWTABLE_FDB(dev->mdev, decap) && esw_encap) flags |= MLX5_FLOW_TABLE_TUNNEL_EN_DECAP; - if (MLX5_CAP_ESW_FLOWTABLE_FDB(dev->mdev, reformat_l3_tunnel_to_l2) && + if (MLX5_CAP_ESW_FLOWTABLE_FDB(dev->mdev, + reformat_l3_tunnel_to_l2) && esw_encap) flags |= MLX5_FLOW_TABLE_TUNNEL_EN_REFORMAT; priority = FDB_BYPASS_PATH; - } else if (fs_matcher->ns_type == MLX5_FLOW_NAMESPACE_RDMA_RX) { - max_table_size = - BIT(MLX5_CAP_FLOWTABLE_RDMA_RX(dev->mdev, - log_max_ft_size)); + break; + case MLX5_FLOW_NAMESPACE_RDMA_RX: + max_table_size = BIT( + MLX5_CAP_FLOWTABLE_RDMA_RX(dev->mdev, log_max_ft_size)); priority = fs_matcher->priority; - } else if (fs_matcher->ns_type == MLX5_FLOW_NAMESPACE_RDMA_TX) { - max_table_size = - BIT(MLX5_CAP_FLOWTABLE_RDMA_TX(dev->mdev, - log_max_ft_size)); + break; + case MLX5_FLOW_NAMESPACE_RDMA_TX: + max_table_size = BIT( + MLX5_CAP_FLOWTABLE_RDMA_TX(dev->mdev, log_max_ft_size)); priority = fs_matcher->priority; + break; + default: + break; } max_table_size = min_t(int, max_table_size, MLX5_FS_MAX_ENTRIES); @@ -1346,16 +1359,24 @@ _get_flow_table(struct mlx5_ib_dev *dev, if (!ns) return ERR_PTR(-EOPNOTSUPP); - if (fs_matcher->ns_type == MLX5_FLOW_NAMESPACE_BYPASS) + switch (fs_matcher->ns_type) { + case MLX5_FLOW_NAMESPACE_BYPASS: prio = &dev->flow_db->prios[priority]; - else if (fs_matcher->ns_type == MLX5_FLOW_NAMESPACE_EGRESS) + break; + case MLX5_FLOW_NAMESPACE_EGRESS: prio = &dev->flow_db->egress_prios[priority]; - else if (fs_matcher->ns_type == MLX5_FLOW_NAMESPACE_FDB) + break; + case MLX5_FLOW_NAMESPACE_FDB: prio = &dev->flow_db->fdb; - else if (fs_matcher->ns_type == MLX5_FLOW_NAMESPACE_RDMA_RX) + break; + case MLX5_FLOW_NAMESPACE_RDMA_RX: prio = &dev->flow_db->rdma_rx[priority]; - else if (fs_matcher->ns_type == MLX5_FLOW_NAMESPACE_RDMA_TX) + break; + case MLX5_FLOW_NAMESPACE_RDMA_TX: prio = &dev->flow_db->rdma_tx[priority]; + break; + default: return ERR_PTR(-EINVAL); + } if (!prio) return ERR_PTR(-EINVAL); @@ -1488,20 +1509,25 @@ static struct mlx5_ib_flow_handler *raw_fs_rule_add( goto unlock; } - if (dest_type == MLX5_FLOW_DESTINATION_TYPE_TIR) { + switch (dest_type) { + case MLX5_FLOW_DESTINATION_TYPE_TIR: dst[dst_num].type = dest_type; dst[dst_num++].tir_num = dest_id; flow_act->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST; - } else if (dest_type == MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE) { + break; + case MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE: dst[dst_num].type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE_NUM; dst[dst_num++].ft_num = dest_id; flow_act->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST; - } else if (dest_type == MLX5_FLOW_DESTINATION_TYPE_PORT) { + break; + case MLX5_FLOW_DESTINATION_TYPE_PORT: dst[dst_num++].type = MLX5_FLOW_DESTINATION_TYPE_PORT; flow_act->action |= MLX5_FLOW_CONTEXT_ACTION_ALLOW; + break; + default: + break; } - if (flow_act->action & MLX5_FLOW_CONTEXT_ACTION_COUNT) { dst[dst_num].type = MLX5_FLOW_DESTINATION_TYPE_COUNTER; dst[dst_num].counter_id = counter_id; -- 2.39.5