diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/esw/vporttbl.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/esw/vporttbl.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/vporttbl.c b/drivers/net/ethernet/mellanox/mlx5/core/esw/vporttbl.c new file mode 100644 index 000000000..749c3957a --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/esw/vporttbl.c @@ -0,0 +1,150 @@ +// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB +// Copyright (c) 2021 Mellanox Technologies. + +#include "eswitch.h" + +/* This struct is used as a key to the hash table and we need it to be packed + * so hash result is consistent + */ +struct mlx5_vport_key { + u32 chain; + u16 prio; + u16 vport; + u16 vhca_id; + struct esw_vport_tbl_namespace *vport_ns; +} __packed; + +struct mlx5_vport_table { + struct hlist_node hlist; + struct mlx5_flow_table *fdb; + u32 num_rules; + struct mlx5_vport_key key; +}; + +static void +esw_vport_tbl_init(struct mlx5_eswitch *esw, struct esw_vport_tbl_namespace *ns) +{ + if (esw->offloads.encap != DEVLINK_ESWITCH_ENCAP_MODE_NONE) + ns->flags |= (MLX5_FLOW_TABLE_TUNNEL_EN_REFORMAT | + MLX5_FLOW_TABLE_TUNNEL_EN_DECAP); +} + +static struct mlx5_flow_table * +esw_vport_tbl_create(struct mlx5_eswitch *esw, struct mlx5_flow_namespace *ns, + const struct esw_vport_tbl_namespace *vport_ns) +{ + struct mlx5_flow_table_attr ft_attr = {}; + struct mlx5_flow_table *fdb; + + if (vport_ns->max_num_groups) + ft_attr.autogroup.max_num_groups = vport_ns->max_num_groups; + else + ft_attr.autogroup.max_num_groups = esw->params.large_group_num; + ft_attr.max_fte = vport_ns->max_fte; + ft_attr.prio = FDB_PER_VPORT; + ft_attr.flags = vport_ns->flags; + fdb = mlx5_create_auto_grouped_flow_table(ns, &ft_attr); + if (IS_ERR(fdb)) { + esw_warn(esw->dev, "Failed to create per vport FDB Table err %ld\n", + PTR_ERR(fdb)); + } + + return fdb; +} + +static u32 flow_attr_to_vport_key(struct mlx5_eswitch *esw, + struct mlx5_vport_tbl_attr *attr, + struct mlx5_vport_key *key) +{ + key->vport = attr->vport; + key->chain = attr->chain; + key->prio = attr->prio; + key->vhca_id = MLX5_CAP_GEN(esw->dev, vhca_id); + key->vport_ns = attr->vport_ns; + return jhash(key, sizeof(*key), 0); +} + +/* caller must hold vports.lock */ +static struct mlx5_vport_table * +esw_vport_tbl_lookup(struct mlx5_eswitch *esw, struct mlx5_vport_key *skey, u32 key) +{ + struct mlx5_vport_table *e; + + hash_for_each_possible(esw->fdb_table.offloads.vports.table, e, hlist, key) + if (!memcmp(&e->key, skey, sizeof(*skey))) + return e; + + return NULL; +} + +struct mlx5_flow_table * +mlx5_esw_vporttbl_get(struct mlx5_eswitch *esw, struct mlx5_vport_tbl_attr *attr) +{ + struct mlx5_core_dev *dev = esw->dev; + struct mlx5_flow_namespace *ns; + struct mlx5_flow_table *fdb; + struct mlx5_vport_table *e; + struct mlx5_vport_key skey; + u32 hkey; + + mutex_lock(&esw->fdb_table.offloads.vports.lock); + esw_vport_tbl_init(esw, attr->vport_ns); + hkey = flow_attr_to_vport_key(esw, attr, &skey); + e = esw_vport_tbl_lookup(esw, &skey, hkey); + if (e) { + e->num_rules++; + goto out; + } + + e = kzalloc(sizeof(*e), GFP_KERNEL); + if (!e) { + fdb = ERR_PTR(-ENOMEM); + goto err_alloc; + } + + ns = mlx5_get_flow_namespace(dev, MLX5_FLOW_NAMESPACE_FDB); + if (!ns) { + esw_warn(dev, "Failed to get FDB namespace\n"); + fdb = ERR_PTR(-ENOENT); + goto err_ns; + } + + fdb = esw_vport_tbl_create(esw, ns, attr->vport_ns); + if (IS_ERR(fdb)) + goto err_ns; + + e->fdb = fdb; + e->num_rules = 1; + e->key = skey; + hash_add(esw->fdb_table.offloads.vports.table, &e->hlist, hkey); +out: + mutex_unlock(&esw->fdb_table.offloads.vports.lock); + return e->fdb; + +err_ns: + kfree(e); +err_alloc: + mutex_unlock(&esw->fdb_table.offloads.vports.lock); + return fdb; +} + +void +mlx5_esw_vporttbl_put(struct mlx5_eswitch *esw, struct mlx5_vport_tbl_attr *attr) +{ + struct mlx5_vport_table *e; + struct mlx5_vport_key key; + u32 hkey; + + mutex_lock(&esw->fdb_table.offloads.vports.lock); + esw_vport_tbl_init(esw, attr->vport_ns); + hkey = flow_attr_to_vport_key(esw, attr, &key); + e = esw_vport_tbl_lookup(esw, &key, hkey); + if (!e || --e->num_rules) + goto out; + + hash_del(&e->hlist); + mlx5_destroy_flow_table(e->fdb); + kfree(e); +out: + mutex_unlock(&esw->fdb_table.offloads.vports.lock); +} |