diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlxsw/spectrum_flow.c')
-rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/spectrum_flow.c | 295 |
1 files changed, 295 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_flow.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_flow.c new file mode 100644 index 000000000..9e50c823a --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_flow.c @@ -0,0 +1,295 @@ +// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 +/* Copyright (c) 2017-2020 Mellanox Technologies. All rights reserved */ + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/errno.h> +#include <linux/list.h> +#include <net/net_namespace.h> + +#include "spectrum.h" + +struct mlxsw_sp_flow_block * +mlxsw_sp_flow_block_create(struct mlxsw_sp *mlxsw_sp, struct net *net) +{ + struct mlxsw_sp_flow_block *block; + + block = kzalloc(sizeof(*block), GFP_KERNEL); + if (!block) + return NULL; + INIT_LIST_HEAD(&block->binding_list); + INIT_LIST_HEAD(&block->mall.list); + block->mlxsw_sp = mlxsw_sp; + block->net = net; + return block; +} + +void mlxsw_sp_flow_block_destroy(struct mlxsw_sp_flow_block *block) +{ + WARN_ON(!list_empty(&block->binding_list)); + kfree(block); +} + +static struct mlxsw_sp_flow_block_binding * +mlxsw_sp_flow_block_lookup(struct mlxsw_sp_flow_block *block, + struct mlxsw_sp_port *mlxsw_sp_port, bool ingress) +{ + struct mlxsw_sp_flow_block_binding *binding; + + list_for_each_entry(binding, &block->binding_list, list) + if (binding->mlxsw_sp_port == mlxsw_sp_port && + binding->ingress == ingress) + return binding; + return NULL; +} + +static bool +mlxsw_sp_flow_block_ruleset_bound(const struct mlxsw_sp_flow_block *block) +{ + return block->ruleset_zero; +} + +static int mlxsw_sp_flow_block_bind(struct mlxsw_sp *mlxsw_sp, + struct mlxsw_sp_flow_block *block, + struct mlxsw_sp_port *mlxsw_sp_port, + bool ingress, + struct netlink_ext_ack *extack) +{ + struct mlxsw_sp_flow_block_binding *binding; + int err; + + if (WARN_ON(mlxsw_sp_flow_block_lookup(block, mlxsw_sp_port, ingress))) + return -EEXIST; + + if (ingress && block->ingress_blocker_rule_count) { + NL_SET_ERR_MSG_MOD(extack, "Block cannot be bound to ingress because it contains unsupported rules"); + return -EOPNOTSUPP; + } + + if (!ingress && block->egress_blocker_rule_count) { + NL_SET_ERR_MSG_MOD(extack, "Block cannot be bound to egress because it contains unsupported rules"); + return -EOPNOTSUPP; + } + + err = mlxsw_sp_mall_port_bind(block, mlxsw_sp_port, extack); + if (err) + return err; + + binding = kzalloc(sizeof(*binding), GFP_KERNEL); + if (!binding) { + err = -ENOMEM; + goto err_binding_alloc; + } + binding->mlxsw_sp_port = mlxsw_sp_port; + binding->ingress = ingress; + + if (mlxsw_sp_flow_block_ruleset_bound(block)) { + err = mlxsw_sp_acl_ruleset_bind(mlxsw_sp, block, binding); + if (err) + goto err_ruleset_bind; + } + + if (ingress) + block->ingress_binding_count++; + else + block->egress_binding_count++; + list_add(&binding->list, &block->binding_list); + return 0; + +err_ruleset_bind: + kfree(binding); +err_binding_alloc: + mlxsw_sp_mall_port_unbind(block, mlxsw_sp_port); + + return err; +} + +static int mlxsw_sp_flow_block_unbind(struct mlxsw_sp *mlxsw_sp, + struct mlxsw_sp_flow_block *block, + struct mlxsw_sp_port *mlxsw_sp_port, + bool ingress) +{ + struct mlxsw_sp_flow_block_binding *binding; + + binding = mlxsw_sp_flow_block_lookup(block, mlxsw_sp_port, ingress); + if (!binding) + return -ENOENT; + + list_del(&binding->list); + + if (ingress) + block->ingress_binding_count--; + else + block->egress_binding_count--; + + if (mlxsw_sp_flow_block_ruleset_bound(block)) + mlxsw_sp_acl_ruleset_unbind(mlxsw_sp, block, binding); + + kfree(binding); + + mlxsw_sp_mall_port_unbind(block, mlxsw_sp_port); + + return 0; +} + +static int mlxsw_sp_flow_block_mall_cb(struct mlxsw_sp_flow_block *flow_block, + struct tc_cls_matchall_offload *f) +{ + struct mlxsw_sp *mlxsw_sp = mlxsw_sp_flow_block_mlxsw_sp(flow_block); + + switch (f->command) { + case TC_CLSMATCHALL_REPLACE: + return mlxsw_sp_mall_replace(mlxsw_sp, flow_block, f); + case TC_CLSMATCHALL_DESTROY: + mlxsw_sp_mall_destroy(flow_block, f); + return 0; + default: + return -EOPNOTSUPP; + } +} + +static int mlxsw_sp_flow_block_flower_cb(struct mlxsw_sp_flow_block *flow_block, + struct flow_cls_offload *f) +{ + struct mlxsw_sp *mlxsw_sp = mlxsw_sp_flow_block_mlxsw_sp(flow_block); + + switch (f->command) { + case FLOW_CLS_REPLACE: + return mlxsw_sp_flower_replace(mlxsw_sp, flow_block, f); + case FLOW_CLS_DESTROY: + mlxsw_sp_flower_destroy(mlxsw_sp, flow_block, f); + return 0; + case FLOW_CLS_STATS: + return mlxsw_sp_flower_stats(mlxsw_sp, flow_block, f); + case FLOW_CLS_TMPLT_CREATE: + return mlxsw_sp_flower_tmplt_create(mlxsw_sp, flow_block, f); + case FLOW_CLS_TMPLT_DESTROY: + mlxsw_sp_flower_tmplt_destroy(mlxsw_sp, flow_block, f); + return 0; + default: + return -EOPNOTSUPP; + } +} + +static int mlxsw_sp_flow_block_cb(enum tc_setup_type type, + void *type_data, void *cb_priv) +{ + struct mlxsw_sp_flow_block *flow_block = cb_priv; + + if (mlxsw_sp_flow_block_disabled(flow_block)) + return -EOPNOTSUPP; + + switch (type) { + case TC_SETUP_CLSMATCHALL: + return mlxsw_sp_flow_block_mall_cb(flow_block, type_data); + case TC_SETUP_CLSFLOWER: + return mlxsw_sp_flow_block_flower_cb(flow_block, type_data); + default: + return -EOPNOTSUPP; + } +} + +static void mlxsw_sp_tc_block_release(void *cb_priv) +{ + struct mlxsw_sp_flow_block *flow_block = cb_priv; + + mlxsw_sp_flow_block_destroy(flow_block); +} + +static LIST_HEAD(mlxsw_sp_block_cb_list); + +static int mlxsw_sp_setup_tc_block_bind(struct mlxsw_sp_port *mlxsw_sp_port, + struct flow_block_offload *f, + bool ingress) +{ + struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp; + struct mlxsw_sp_flow_block *flow_block; + struct flow_block_cb *block_cb; + bool register_block = false; + int err; + + block_cb = flow_block_cb_lookup(f->block, mlxsw_sp_flow_block_cb, + mlxsw_sp); + if (!block_cb) { + flow_block = mlxsw_sp_flow_block_create(mlxsw_sp, f->net); + if (!flow_block) + return -ENOMEM; + block_cb = flow_block_cb_alloc(mlxsw_sp_flow_block_cb, + mlxsw_sp, flow_block, + mlxsw_sp_tc_block_release); + if (IS_ERR(block_cb)) { + mlxsw_sp_flow_block_destroy(flow_block); + return PTR_ERR(block_cb); + } + register_block = true; + } else { + flow_block = flow_block_cb_priv(block_cb); + } + flow_block_cb_incref(block_cb); + err = mlxsw_sp_flow_block_bind(mlxsw_sp, flow_block, + mlxsw_sp_port, ingress, f->extack); + if (err) + goto err_block_bind; + + if (ingress) + mlxsw_sp_port->ing_flow_block = flow_block; + else + mlxsw_sp_port->eg_flow_block = flow_block; + + if (register_block) { + flow_block_cb_add(block_cb, f); + list_add_tail(&block_cb->driver_list, &mlxsw_sp_block_cb_list); + } + + return 0; + +err_block_bind: + if (!flow_block_cb_decref(block_cb)) + flow_block_cb_free(block_cb); + return err; +} + +static void mlxsw_sp_setup_tc_block_unbind(struct mlxsw_sp_port *mlxsw_sp_port, + struct flow_block_offload *f, + bool ingress) +{ + struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp; + struct mlxsw_sp_flow_block *flow_block; + struct flow_block_cb *block_cb; + int err; + + block_cb = flow_block_cb_lookup(f->block, mlxsw_sp_flow_block_cb, + mlxsw_sp); + if (!block_cb) + return; + + if (ingress) + mlxsw_sp_port->ing_flow_block = NULL; + else + mlxsw_sp_port->eg_flow_block = NULL; + + flow_block = flow_block_cb_priv(block_cb); + err = mlxsw_sp_flow_block_unbind(mlxsw_sp, flow_block, + mlxsw_sp_port, ingress); + if (!err && !flow_block_cb_decref(block_cb)) { + flow_block_cb_remove(block_cb, f); + list_del(&block_cb->driver_list); + } +} + +int mlxsw_sp_setup_tc_block_clsact(struct mlxsw_sp_port *mlxsw_sp_port, + struct flow_block_offload *f, + bool ingress) +{ + f->driver_block_list = &mlxsw_sp_block_cb_list; + + switch (f->command) { + case FLOW_BLOCK_BIND: + return mlxsw_sp_setup_tc_block_bind(mlxsw_sp_port, f, ingress); + case FLOW_BLOCK_UNBIND: + mlxsw_sp_setup_tc_block_unbind(mlxsw_sp_port, f, ingress); + return 0; + default: + return -EOPNOTSUPP; + } +} |