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

INCLUDED FROM

   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 #include <linux/llist.h>
  40 #include <steering/fs_dr.h>
  41 
  42 struct mlx5_modify_hdr {
  43         enum mlx5_flow_namespace_type ns_type;
  44         union {
  45                 struct mlx5_fs_dr_action action;
  46                 u32 id;
  47         };
  48 };
  49 
  50 struct mlx5_pkt_reformat {
  51         enum mlx5_flow_namespace_type ns_type;
  52         int reformat_type; /* from mlx5_ifc */
  53         union {
  54                 struct mlx5_fs_dr_action action;
  55                 u32 id;
  56         };
  57 };
  58 
  59 /* FS_TYPE_PRIO_CHAINS is a PRIO that will have namespaces only,
  60  * and those are in parallel to one another when going over them to connect
  61  * a new flow table. Meaning the last flow table in a TYPE_PRIO prio in one
  62  * parallel namespace will not automatically connect to the first flow table
  63  * found in any prio in any next namespace, but skip the entire containing
  64  * TYPE_PRIO_CHAINS prio.
  65  *
  66  * This is used to implement tc chains, each chain of prios is a different
  67  * namespace inside a containing TYPE_PRIO_CHAINS prio.
  68  */
  69 
  70 enum fs_node_type {
  71         FS_TYPE_NAMESPACE,
  72         FS_TYPE_PRIO,
  73         FS_TYPE_PRIO_CHAINS,
  74         FS_TYPE_FLOW_TABLE,
  75         FS_TYPE_FLOW_GROUP,
  76         FS_TYPE_FLOW_ENTRY,
  77         FS_TYPE_FLOW_DEST
  78 };
  79 
  80 enum fs_flow_table_type {
  81         FS_FT_NIC_RX          = 0x0,
  82         FS_FT_NIC_TX          = 0x1,
  83         FS_FT_ESW_EGRESS_ACL  = 0x2,
  84         FS_FT_ESW_INGRESS_ACL = 0x3,
  85         FS_FT_FDB             = 0X4,
  86         FS_FT_SNIFFER_RX        = 0X5,
  87         FS_FT_SNIFFER_TX        = 0X6,
  88         FS_FT_RDMA_RX           = 0X7,
  89         FS_FT_MAX_TYPE = FS_FT_RDMA_RX,
  90 };
  91 
  92 enum fs_flow_table_op_mod {
  93         FS_FT_OP_MOD_NORMAL,
  94         FS_FT_OP_MOD_LAG_DEMUX,
  95 };
  96 
  97 enum fs_fte_status {
  98         FS_FTE_STATUS_EXISTING = 1UL << 0,
  99 };
 100 
 101 enum mlx5_flow_steering_mode {
 102         MLX5_FLOW_STEERING_MODE_DMFS,
 103         MLX5_FLOW_STEERING_MODE_SMFS
 104 };
 105 
 106 struct mlx5_flow_steering {
 107         struct mlx5_core_dev *dev;
 108         enum   mlx5_flow_steering_mode  mode;
 109         struct kmem_cache               *fgs_cache;
 110         struct kmem_cache               *ftes_cache;
 111         struct mlx5_flow_root_namespace *root_ns;
 112         struct mlx5_flow_root_namespace *fdb_root_ns;
 113         struct mlx5_flow_namespace      **fdb_sub_ns;
 114         struct mlx5_flow_root_namespace **esw_egress_root_ns;
 115         struct mlx5_flow_root_namespace **esw_ingress_root_ns;
 116         struct mlx5_flow_root_namespace *sniffer_tx_root_ns;
 117         struct mlx5_flow_root_namespace *sniffer_rx_root_ns;
 118         struct mlx5_flow_root_namespace *rdma_rx_root_ns;
 119         struct mlx5_flow_root_namespace *egress_root_ns;
 120 };
 121 
 122 struct fs_node {
 123         struct list_head        list;
 124         struct list_head        children;
 125         enum fs_node_type       type;
 126         struct fs_node          *parent;
 127         struct fs_node          *root;
 128         /* lock the node for writing and traversing */
 129         struct rw_semaphore     lock;
 130         refcount_t              refcount;
 131         bool                    active;
 132         void                    (*del_hw_func)(struct fs_node *);
 133         void                    (*del_sw_func)(struct fs_node *);
 134         atomic_t                version;
 135 };
 136 
 137 struct mlx5_flow_rule {
 138         struct fs_node                          node;
 139         struct mlx5_flow_destination            dest_attr;
 140         /* next_ft should be accessed under chain_lock and only of
 141          * destination type is FWD_NEXT_fT.
 142          */
 143         struct list_head                        next_ft;
 144         u32                                     sw_action;
 145 };
 146 
 147 struct mlx5_flow_handle {
 148         int num_rules;
 149         struct mlx5_flow_rule *rule[];
 150 };
 151 
 152 /* Type of children is mlx5_flow_group */
 153 struct mlx5_flow_table {
 154         struct fs_node                  node;
 155         struct mlx5_fs_dr_table         fs_dr_table;
 156         u32                             id;
 157         u16                             vport;
 158         unsigned int                    max_fte;
 159         unsigned int                    level;
 160         enum fs_flow_table_type         type;
 161         enum fs_flow_table_op_mod       op_mod;
 162         struct {
 163                 bool                    active;
 164                 unsigned int            required_groups;
 165                 unsigned int            group_size;
 166                 unsigned int            num_groups;
 167         } autogroup;
 168         /* Protect fwd_rules */
 169         struct mutex                    lock;
 170         /* FWD rules that point on this flow table */
 171         struct list_head                fwd_rules;
 172         u32                             flags;
 173         struct rhltable                 fgs_hash;
 174         enum mlx5_flow_table_miss_action def_miss_action;
 175 };
 176 
 177 struct mlx5_ft_underlay_qp {
 178         struct list_head list;
 179         u32 qpn;
 180 };
 181 
 182 #define MLX5_FTE_MATCH_PARAM_RESERVED   reserved_at_a00
 183 /* Calculate the fte_match_param length and without the reserved length.
 184  * Make sure the reserved field is the last.
 185  */
 186 #define MLX5_ST_SZ_DW_MATCH_PARAM                                           \
 187         ((MLX5_BYTE_OFF(fte_match_param, MLX5_FTE_MATCH_PARAM_RESERVED) / sizeof(u32)) + \
 188          BUILD_BUG_ON_ZERO(MLX5_ST_SZ_BYTES(fte_match_param) !=              \
 189                            MLX5_FLD_SZ_BYTES(fte_match_param,                \
 190                                              MLX5_FTE_MATCH_PARAM_RESERVED) +\
 191                            MLX5_BYTE_OFF(fte_match_param,                    \
 192                                          MLX5_FTE_MATCH_PARAM_RESERVED)))
 193 
 194 /* Type of children is mlx5_flow_rule */
 195 struct fs_fte {
 196         struct fs_node                  node;
 197         struct mlx5_fs_dr_rule          fs_dr_rule;
 198         u32                             val[MLX5_ST_SZ_DW_MATCH_PARAM];
 199         u32                             dests_size;
 200         u32                             index;
 201         struct mlx5_flow_context        flow_context;
 202         struct mlx5_flow_act            action;
 203         enum fs_fte_status              status;
 204         struct mlx5_fc                  *counter;
 205         struct rhash_head               hash;
 206         int                             modify_mask;
 207 };
 208 
 209 /* Type of children is mlx5_flow_table/namespace */
 210 struct fs_prio {
 211         struct fs_node                  node;
 212         unsigned int                    num_levels;
 213         unsigned int                    start_level;
 214         unsigned int                    prio;
 215         unsigned int                    num_ft;
 216 };
 217 
 218 /* Type of children is fs_prio */
 219 struct mlx5_flow_namespace {
 220         /* parent == NULL => root ns */
 221         struct  fs_node                 node;
 222         enum mlx5_flow_table_miss_action def_miss_action;
 223 };
 224 
 225 struct mlx5_flow_group_mask {
 226         u8      match_criteria_enable;
 227         u32     match_criteria[MLX5_ST_SZ_DW_MATCH_PARAM];
 228 };
 229 
 230 /* Type of children is fs_fte */
 231 struct mlx5_flow_group {
 232         struct fs_node                  node;
 233         struct mlx5_fs_dr_matcher       fs_dr_matcher;
 234         struct mlx5_flow_group_mask     mask;
 235         u32                             start_index;
 236         u32                             max_ftes;
 237         struct ida                      fte_allocator;
 238         u32                             id;
 239         struct rhashtable               ftes_hash;
 240         struct rhlist_head              hash;
 241 };
 242 
 243 struct mlx5_flow_root_namespace {
 244         struct mlx5_flow_namespace      ns;
 245         enum   mlx5_flow_steering_mode  mode;
 246         struct mlx5_fs_dr_domain        fs_dr_domain;
 247         enum   fs_flow_table_type       table_type;
 248         struct mlx5_core_dev            *dev;
 249         struct mlx5_flow_table          *root_ft;
 250         /* Should be held when chaining flow tables */
 251         struct mutex                    chain_lock;
 252         struct list_head                underlay_qpns;
 253         const struct mlx5_flow_cmds     *cmds;
 254 };
 255 
 256 int mlx5_init_fc_stats(struct mlx5_core_dev *dev);
 257 void mlx5_cleanup_fc_stats(struct mlx5_core_dev *dev);
 258 void mlx5_fc_queue_stats_work(struct mlx5_core_dev *dev,
 259                               struct delayed_work *dwork,
 260                               unsigned long delay);
 261 void mlx5_fc_update_sampling_interval(struct mlx5_core_dev *dev,
 262                                       unsigned long interval);
 263 
 264 const struct mlx5_flow_cmds *mlx5_fs_cmd_get_fw_cmds(void);
 265 
 266 int mlx5_flow_namespace_set_peer(struct mlx5_flow_root_namespace *ns,
 267                                  struct mlx5_flow_root_namespace *peer_ns);
 268 
 269 int mlx5_flow_namespace_set_mode(struct mlx5_flow_namespace *ns,
 270                                  enum mlx5_flow_steering_mode mode);
 271 
 272 int mlx5_init_fs(struct mlx5_core_dev *dev);
 273 void mlx5_cleanup_fs(struct mlx5_core_dev *dev);
 274 
 275 #define fs_get_obj(v, _node)  {v = container_of((_node), typeof(*v), node); }
 276 
 277 #define fs_list_for_each_entry(pos, root)               \
 278         list_for_each_entry(pos, root, node.list)
 279 
 280 #define fs_list_for_each_entry_safe(pos, tmp, root)             \
 281         list_for_each_entry_safe(pos, tmp, root, node.list)
 282 
 283 #define fs_for_each_ns_or_ft_reverse(pos, prio)                         \
 284         list_for_each_entry_reverse(pos, &(prio)->node.children, list)
 285 
 286 #define fs_for_each_ns_or_ft(pos, prio)                                 \
 287         list_for_each_entry(pos, (&(prio)->node.children), list)
 288 
 289 #define fs_for_each_prio(pos, ns)                       \
 290         fs_list_for_each_entry(pos, &(ns)->node.children)
 291 
 292 #define fs_for_each_ns(pos, prio)                       \
 293         fs_list_for_each_entry(pos, &(prio)->node.children)
 294 
 295 #define fs_for_each_ft(pos, prio)                       \
 296         fs_list_for_each_entry(pos, &(prio)->node.children)
 297 
 298 #define fs_for_each_ft_safe(pos, tmp, prio)                     \
 299         fs_list_for_each_entry_safe(pos, tmp, &(prio)->node.children)
 300 
 301 #define fs_for_each_fg(pos, ft)                 \
 302         fs_list_for_each_entry(pos, &(ft)->node.children)
 303 
 304 #define fs_for_each_fte(pos, fg)                        \
 305         fs_list_for_each_entry(pos, &(fg)->node.children)
 306 
 307 #define fs_for_each_dst(pos, fte)                       \
 308         fs_list_for_each_entry(pos, &(fte)->node.children)
 309 
 310 #define MLX5_CAP_FLOWTABLE_TYPE(mdev, cap, type) (              \
 311         (type == FS_FT_NIC_RX) ? MLX5_CAP_FLOWTABLE_NIC_RX(mdev, cap) :         \
 312         (type == FS_FT_ESW_EGRESS_ACL) ? MLX5_CAP_ESW_EGRESS_ACL(mdev, cap) :           \
 313         (type == FS_FT_ESW_INGRESS_ACL) ? MLX5_CAP_ESW_INGRESS_ACL(mdev, cap) :         \
 314         (type == FS_FT_FDB) ? MLX5_CAP_ESW_FLOWTABLE_FDB(mdev, cap) :           \
 315         (type == FS_FT_SNIFFER_RX) ? MLX5_CAP_FLOWTABLE_SNIFFER_RX(mdev, cap) :         \
 316         (type == FS_FT_SNIFFER_TX) ? MLX5_CAP_FLOWTABLE_SNIFFER_TX(mdev, cap) :         \
 317         (type == FS_FT_RDMA_RX) ? MLX5_CAP_FLOWTABLE_RDMA_RX(mdev, cap) :               \
 318         (BUILD_BUG_ON_ZERO(FS_FT_RDMA_RX != FS_FT_MAX_TYPE))\
 319         )
 320 
 321 #endif