net/mlx5_core: Add flow steering base data structures
Introducing the base data structure and its operations that are going to represent ConnectX-4 Flow Steering, this data structure is basically a tree and all Flow steering objects such as (Flow Table/Flow Group/FTE/etc ..) are represented as fs_node(s). fs_node is the base object which describes a basic tree node, with the following extra info: type: describes the runtime type of the node (Object). lock: lock this node sub-tree. ref_count: number of children + current references. remove_func: a generic destructor. fs_node types will be used and explained once the usage is added in the following patches. Signed-off-by: Maor Gottlieb <maorg@mellanox.com> Signed-off-by: Moni Shoua <monis@mellanox.com> Signed-off-by: Matan Barak <matanb@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -2,7 +2,7 @@ obj-$(CONFIG_MLX5_CORE) += mlx5_core.o
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mlx5_core-y := main.o cmd.o debugfs.o fw.o eq.o uar.o pagealloc.o \
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mlx5_core-y := main.o cmd.o debugfs.o fw.o eq.o uar.o pagealloc.o \
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health.o mcg.o cq.o srq.o alloc.o qp.o port.o mr.o pd.o \
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health.o mcg.o cq.o srq.o alloc.o qp.o port.o mr.o pd.o \
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mad.o transobj.o vport.o sriov.o fs_cmd.o
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mad.o transobj.o vport.o sriov.o fs_cmd.o fs_core.o
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mlx5_core-$(CONFIG_MLX5_CORE_EN) += wq.o flow_table.o eswitch.o \
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mlx5_core-$(CONFIG_MLX5_CORE_EN) += wq.o flow_table.o eswitch.o \
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en_main.o en_flow_table.o en_ethtool.o en_tx.o en_rx.o \
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en_main.o en_flow_table.o en_ethtool.o en_tx.o en_rx.o \
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en_txrx.o
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en_txrx.o
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116
drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
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116
drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
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@ -0,0 +1,116 @@
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/*
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* Copyright (c) 2015, Mellanox Technologies. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/mutex.h>
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#include <linux/mlx5/driver.h>
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#include "mlx5_core.h"
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#include "fs_core.h"
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static void tree_init_node(struct fs_node *node,
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unsigned int refcount,
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void (*remove_func)(struct fs_node *))
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{
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atomic_set(&node->refcount, refcount);
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INIT_LIST_HEAD(&node->list);
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INIT_LIST_HEAD(&node->children);
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mutex_init(&node->lock);
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node->remove_func = remove_func;
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}
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static void tree_add_node(struct fs_node *node, struct fs_node *parent)
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{
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if (parent)
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atomic_inc(&parent->refcount);
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node->parent = parent;
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/* Parent is the root */
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if (!parent)
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node->root = node;
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else
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node->root = parent->root;
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}
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static void tree_get_node(struct fs_node *node)
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{
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atomic_inc(&node->refcount);
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}
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static void nested_lock_ref_node(struct fs_node *node)
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{
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if (node) {
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mutex_lock_nested(&node->lock, SINGLE_DEPTH_NESTING);
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atomic_inc(&node->refcount);
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}
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}
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static void lock_ref_node(struct fs_node *node)
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{
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if (node) {
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mutex_lock(&node->lock);
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atomic_inc(&node->refcount);
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}
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}
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static void unlock_ref_node(struct fs_node *node)
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{
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if (node) {
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atomic_dec(&node->refcount);
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mutex_unlock(&node->lock);
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}
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}
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static void tree_put_node(struct fs_node *node)
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{
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struct fs_node *parent_node = node->parent;
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lock_ref_node(parent_node);
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if (atomic_dec_and_test(&node->refcount)) {
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if (parent_node)
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list_del_init(&node->list);
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if (node->remove_func)
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node->remove_func(node);
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kfree(node);
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node = NULL;
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}
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unlock_ref_node(parent_node);
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if (!node && parent_node)
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tree_put_node(parent_node);
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}
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static int tree_remove_node(struct fs_node *node)
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{
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if (atomic_read(&node->refcount) > 1)
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return -EPERM;
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tree_put_node(node);
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return 0;
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}
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@ -56,6 +56,12 @@ struct fs_node {
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struct list_head list;
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struct list_head list;
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struct list_head children;
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struct list_head children;
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enum fs_node_type type;
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enum fs_node_type type;
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struct fs_node *parent;
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struct fs_node *root;
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/* lock the node for writing and traversing */
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struct mutex lock;
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atomic_t refcount;
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void (*remove_func)(struct fs_node *);
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};
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};
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struct mlx5_flow_rule {
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struct mlx5_flow_rule {
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