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