drivers/net/ethernet/mellanox/mlx5/core/fs_core.h

   1 /*
   2  * Copyright (c) 2015, Mellanox Technologies. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #ifndef _MLX5_FS_CORE_
  34 #define _MLX5_FS_CORE_
  35
  36 #include <linux/refcount.h>
  37 #include <linux/mlx5/fs.h>
  38 #include <linux/rhashtable.h>
  39
  40 enum fs_node_type {
  41         FS_TYPE_NAMESPACE,
  42         FS_TYPE_PRIO,
  43         FS_TYPE_FLOW_TABLE,
  44         FS_TYPE_FLOW_GROUP,
  45         FS_TYPE_FLOW_ENTRY,
  46         FS_TYPE_FLOW_DEST
  47 };
  48
  49 enum fs_flow_table_type {
  50         FS_FT_NIC_RX          = 0x0,
  51         FS_FT_NIC_TX          = 0x1,
  52         FS_FT_ESW_EGRESS_ACL  = 0x2,
  53         FS_FT_ESW_INGRESS_ACL = 0x3,
  54         FS_FT_FDB             = 0X4,
  55         FS_FT_SNIFFER_RX        = 0X5,
  56         FS_FT_SNIFFER_TX        = 0X6,
  57         FS_FT_MAX_TYPE = FS_FT_SNIFFER_TX,
  58 };
  59
  60 enum fs_flow_table_op_mod {
  61         FS_FT_OP_MOD_NORMAL,
  62         FS_FT_OP_MOD_LAG_DEMUX,
  63 };
  64
  65 enum fs_fte_status {
  66         FS_FTE_STATUS_EXISTING = 1UL << 0,
  67 };
  68
  69 struct mlx5_flow_steering {
  70         struct mlx5_core_dev *dev;
  71         struct kmem_cache               *fgs_cache;
  72         struct kmem_cache               *ftes_cache;
  73         struct mlx5_flow_root_namespace *root_ns;
  74         struct mlx5_flow_root_namespace *fdb_root_ns;
  75         struct mlx5_flow_root_namespace **esw_egress_root_ns;
  76         struct mlx5_flow_root_namespace **esw_ingress_root_ns;
  77         struct mlx5_flow_root_namespace *sniffer_tx_root_ns;
  78         struct mlx5_flow_root_namespace *sniffer_rx_root_ns;
  79         struct mlx5_flow_root_namespace *egress_root_ns;
  80 };
  81
  82 struct fs_node {
  83         struct list_head        list;
  84         struct list_head        children;
  85         enum fs_node_type       type;
  86         struct fs_node          *parent;
  87         struct fs_node          *root;
  88         /* lock the node for writing and traversing */
  89         struct rw_semaphore     lock;
  90         refcount_t              refcount;
  91         bool                    active;
  92         void                    (*del_hw_func)(struct fs_node *);
  93         void                    (*del_sw_func)(struct fs_node *);
  94         atomic_t                version;
  95 };
  96
  97 struct mlx5_flow_rule {
  98         struct fs_node                          node;
  99         struct mlx5_flow_destination            dest_attr;
 100         /* next_ft should be accessed under chain_lock and only of
 101          * destination type is FWD_NEXT_fT.
 102          */
 103         struct list_head                        next_ft;
 104         u32                                     sw_action;
 105 };
 106
 107 struct mlx5_flow_handle {
 108         int num_rules;
 109         struct mlx5_flow_rule *rule[];
 110 };
 111
 112 /* Type of children is mlx5_flow_group */
 113 struct mlx5_flow_table {
 114         struct fs_node                  node;
 115         u32                             id;
 116         u16                             vport;
 117         unsigned int                    max_fte;
 118         unsigned int                    level;
 119         enum fs_flow_table_type         type;
 120         enum fs_flow_table_op_mod       op_mod;
 121         struct {
 122                 bool                    active;
 123                 unsigned int            required_groups;
 124                 unsigned int            num_groups;
 125         } autogroup;
 126         /* Protect fwd_rules */
 127         struct mutex                    lock;
 128         /* FWD rules that point on this flow table */
 129         struct list_head                fwd_rules;
 130         u32                             flags;
 131         struct rhltable                 fgs_hash;
 132 };
 133
 134 struct mlx5_fc_cache {
 135         u64 packets;
 136         u64 bytes;
 137         u64 lastuse;
 138 };
 139
 140 struct mlx5_fc {
 141         struct rb_node node;
 142         struct list_head list;
 143
 144         /* last{packets,bytes} members are used when calculating the delta since
 145          * last reading
 146          */
 147         u64 lastpackets;
 148         u64 lastbytes;
 149
 150         u32 id;
 151         bool deleted;
 152         bool aging;
 153
 154         struct mlx5_fc_cache cache ____cacheline_aligned_in_smp;
 155 };
 156
 157 struct mlx5_ft_underlay_qp {
 158         struct list_head list;
 159         u32 qpn;
 160 };
 161
 162 #define MLX5_FTE_MATCH_PARAM_RESERVED   reserved_at_800
 163 /* Calculate the fte_match_param length and without the reserved length.
 164  * Make sure the reserved field is the last.
 165  */
 166 #define MLX5_ST_SZ_DW_MATCH_PARAM                                           \
 167         ((MLX5_BYTE_OFF(fte_match_param, MLX5_FTE_MATCH_PARAM_RESERVED) / sizeof(u32)) + \
 168          BUILD_BUG_ON_ZERO(MLX5_ST_SZ_BYTES(fte_match_param) !=              \
 169                            MLX5_FLD_SZ_BYTES(fte_match_param,                \
 170                                              MLX5_FTE_MATCH_PARAM_RESERVED) +\
 171                            MLX5_BYTE_OFF(fte_match_param,                    \
 172                                          MLX5_FTE_MATCH_PARAM_RESERVED)))
 173
 174 /* Type of children is mlx5_flow_rule */
 175 struct fs_fte {
 176         struct fs_node                  node;
 177         u32                             val[MLX5_ST_SZ_DW_MATCH_PARAM];
 178         u32                             dests_size;
 179         u32                             index;
 180         struct mlx5_flow_act            action;
 181         enum fs_fte_status              status;
 182         struct mlx5_fc                  *counter;
 183         struct rhash_head               hash;
 184 };
 185
 186 /* Type of children is mlx5_flow_table/namespace */
 187 struct fs_prio {
 188         struct fs_node                  node;
 189         unsigned int                    num_levels;
 190         unsigned int                    start_level;
 191         unsigned int                    prio;
 192         unsigned int                    num_ft;
 193 };
 194
 195 /* Type of children is fs_prio */
 196 struct mlx5_flow_namespace {
 197         /* parent == NULL => root ns */
 198         struct  fs_node                 node;
 199 };
 200
 201 struct mlx5_flow_group_mask {
 202         u8      match_criteria_enable;
 203         u32     match_criteria[MLX5_ST_SZ_DW_MATCH_PARAM];
 204 };
 205
 206 /* Type of children is fs_fte */
 207 struct mlx5_flow_group {
 208         struct fs_node                  node;
 209         struct mlx5_flow_group_mask     mask;
 210         u32                             start_index;
 211         u32                             max_ftes;
 212         struct ida                      fte_allocator;
 213         u32                             id;
 214         struct rhashtable               ftes_hash;
 215         struct rhlist_head              hash;
 216 };
 217
 218 struct mlx5_flow_root_namespace {
 219         struct mlx5_flow_namespace      ns;
 220         enum   fs_flow_table_type       table_type;
 221         struct mlx5_core_dev            *dev;
 222         struct mlx5_flow_table          *root_ft;
 223         /* Should be held when chaining flow tables */
 224         struct mutex                    chain_lock;
 225         struct list_head                underlay_qpns;
 226         const struct mlx5_flow_cmds     *cmds;
 227 };
 228
 229 int mlx5_init_fc_stats(struct mlx5_core_dev *dev);
 230 void mlx5_cleanup_fc_stats(struct mlx5_core_dev *dev);
 231 void mlx5_fc_queue_stats_work(struct mlx5_core_dev *dev,
 232                               struct delayed_work *dwork,
 233                               unsigned long delay);
 234 void mlx5_fc_update_sampling_interval(struct mlx5_core_dev *dev,
 235                                       unsigned long interval);
 236
 237 int mlx5_init_fs(struct mlx5_core_dev *dev);
 238 void mlx5_cleanup_fs(struct mlx5_core_dev *dev);
 239
 240 #define fs_get_obj(v, _node)  {v = container_of((_node), typeof(*v), node); }
 241
 242 #define fs_list_for_each_entry(pos, root)               \
 243         list_for_each_entry(pos, root, node.list)
 244
 245 #define fs_list_for_each_entry_safe(pos, tmp, root)             \
 246         list_for_each_entry_safe(pos, tmp, root, node.list)
 247
 248 #define fs_for_each_ns_or_ft_reverse(pos, prio)                         \
 249         list_for_each_entry_reverse(pos, &(prio)->node.children, list)
 250
 251 #define fs_for_each_ns_or_ft(pos, prio)                                 \
 252         list_for_each_entry(pos, (&(prio)->node.children), list)
 253
 254 #define fs_for_each_prio(pos, ns)                       \
 255         fs_list_for_each_entry(pos, &(ns)->node.children)
 256
 257 #define fs_for_each_ns(pos, prio)                       \
 258         fs_list_for_each_entry(pos, &(prio)->node.children)
 259
 260 #define fs_for_each_ft(pos, prio)                       \
 261         fs_list_for_each_entry(pos, &(prio)->node.children)
 262
 263 #define fs_for_each_ft_safe(pos, tmp, prio)                     \
 264         fs_list_for_each_entry_safe(pos, tmp, &(prio)->node.children)
 265
 266 #define fs_for_each_fg(pos, ft)                 \
 267         fs_list_for_each_entry(pos, &(ft)->node.children)
 268
 269 #define fs_for_each_fte(pos, fg)                        \
 270         fs_list_for_each_entry(pos, &(fg)->node.children)
 271
 272 #define fs_for_each_dst(pos, fte)                       \
 273         fs_list_for_each_entry(pos, &(fte)->node.children)
 274
 275 #define MLX5_CAP_FLOWTABLE_TYPE(mdev, cap, type) (              \
 276         (type == FS_FT_NIC_RX) ? MLX5_CAP_FLOWTABLE_NIC_RX(mdev, cap) :         \
 277         (type == FS_FT_ESW_EGRESS_ACL) ? MLX5_CAP_ESW_EGRESS_ACL(mdev, cap) :           \
 278         (type == FS_FT_ESW_INGRESS_ACL) ? MLX5_CAP_ESW_INGRESS_ACL(mdev, cap) :         \
 279         (type == FS_FT_FDB) ? MLX5_CAP_ESW_FLOWTABLE_FDB(mdev, cap) :           \
 280         (type == FS_FT_SNIFFER_RX) ? MLX5_CAP_FLOWTABLE_SNIFFER_RX(mdev, cap) :         \
 281         (type == FS_FT_SNIFFER_TX) ? MLX5_CAP_FLOWTABLE_SNIFFER_TX(mdev, cap) :         \
 282         (BUILD_BUG_ON_ZERO(FS_FT_SNIFFER_TX != FS_FT_MAX_TYPE))\
 283         )
 284
 285 #endif