drivers/net/sfc/sfc_flow.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  *
   3  * Copyright(c) 2019-2021 Xilinx, Inc.
   4  * Copyright(c) 2017-2019 Solarflare Communications Inc.
   5  *
   6  * This software was jointly developed between OKTET Labs (under contract
   7  * for Solarflare) and Solarflare Communications, Inc.
   8  */
   9
  10 #ifndef _SFC_FLOW_H
  11 #define _SFC_FLOW_H
  12
  13 #include <rte_tailq.h>
  14 #include <rte_flow_driver.h>
  15
  16 #include "efx.h"
  17
  18 #ifdef __cplusplus
  19 extern "C" {
  20 #endif
  21
  22 /*
  23  * The maximum number of fully elaborated hardware filter specifications
  24  * which can be produced from a template by means of multiplication, if
  25  * missing match flags are needed to be taken into account
  26  */
  27 #define SF_FLOW_SPEC_NB_FILTERS_MAX 8
  28
  29 /* Used to guard action masks */
  30 #define SFC_BUILD_SET_OVERFLOW(_action, _set) \
  31         RTE_BUILD_BUG_ON((_action) >= sizeof(_set) * CHAR_BIT)
  32
  33 /* RSS configuration storage */
  34 struct sfc_flow_rss {
  35         unsigned int    rxq_hw_index_min;
  36         unsigned int    rxq_hw_index_max;
  37         unsigned int    rss_hash_types;
  38         uint8_t         rss_key[EFX_RSS_KEY_SIZE];
  39         unsigned int    rss_tbl[EFX_RSS_TBL_SIZE];
  40 };
  41
  42 /* Flow engines supported by the implementation */
  43 enum sfc_flow_spec_type {
  44         SFC_FLOW_SPEC_FILTER = 0,
  45         SFC_FLOW_SPEC_MAE,
  46
  47         SFC_FLOW_SPEC_NTYPES
  48 };
  49
  50 /* VNIC-specific flow specification */
  51 struct sfc_flow_spec_filter {
  52         /* partial specification from flow rule */
  53         efx_filter_spec_t template;
  54         /* fully elaborated hardware filters specifications */
  55         efx_filter_spec_t filters[SF_FLOW_SPEC_NB_FILTERS_MAX];
  56         /* number of complete specifications */
  57         unsigned int count;
  58         /* RSS toggle */
  59         boolean_t rss;
  60         /* RSS hash toggle */
  61         boolean_t rss_hash_required;
  62         /* RSS configuration */
  63         struct sfc_flow_rss rss_conf;
  64 };
  65
  66 /* MAE-specific flow specification */
  67 struct sfc_flow_spec_mae {
  68         /* Desired priority level */
  69         unsigned int                    priority;
  70         /* Outer rule registry entry */
  71         struct sfc_mae_outer_rule       *outer_rule;
  72         /* EFX match specification */
  73         efx_mae_match_spec_t            *match_spec;
  74         /* Action set registry entry */
  75         struct sfc_mae_action_set       *action_set;
  76         /* Firmware-allocated rule ID */
  77         efx_mae_rule_id_t               rule_id;
  78 };
  79
  80 /* Flow specification */
  81 struct sfc_flow_spec {
  82         /* Flow specification type (engine-based) */
  83         enum sfc_flow_spec_type type;
  84
  85         RTE_STD_C11
  86         union {
  87                 /* Filter-based (VNIC level flows) specification */
  88                 struct sfc_flow_spec_filter filter;
  89                 /* MAE-based (lower-level HW switch flows) specification */
  90                 struct sfc_flow_spec_mae mae;
  91         };
  92 };
  93
  94 /* PMD-specific definition of the opaque type from rte_flow.h */
  95 struct rte_flow {
  96         struct sfc_flow_spec spec;      /* flow specification */
  97         TAILQ_ENTRY(rte_flow) entries;  /* flow list entries */
  98 };
  99
 100 TAILQ_HEAD(sfc_flow_list, rte_flow);
 101
 102 extern const struct rte_flow_ops sfc_flow_ops;
 103
 104 enum sfc_flow_item_layers {
 105         SFC_FLOW_ITEM_ANY_LAYER,
 106         SFC_FLOW_ITEM_START_LAYER,
 107         SFC_FLOW_ITEM_L2,
 108         SFC_FLOW_ITEM_L3,
 109         SFC_FLOW_ITEM_L4,
 110 };
 111
 112 /* Flow parse context types */
 113 enum sfc_flow_parse_ctx_type {
 114         SFC_FLOW_PARSE_CTX_FILTER = 0,
 115         SFC_FLOW_PARSE_CTX_MAE,
 116
 117         SFC_FLOW_PARSE_CTX_NTYPES
 118 };
 119
 120 /* Flow parse context */
 121 struct sfc_flow_parse_ctx {
 122         enum sfc_flow_parse_ctx_type type;
 123
 124         RTE_STD_C11
 125         union {
 126                 /* Context pointer valid for filter-based (VNIC) flows */
 127                 efx_filter_spec_t *filter;
 128                 /* Context pointer valid for MAE-based flows */
 129                 struct sfc_mae_parse_ctx *mae;
 130         };
 131 };
 132
 133 typedef int (sfc_flow_item_parse)(const struct rte_flow_item *item,
 134                                   struct sfc_flow_parse_ctx *parse_ctx,
 135                                   struct rte_flow_error *error);
 136
 137 struct sfc_flow_item {
 138         enum rte_flow_item_type type;           /* Type of item */
 139         enum sfc_flow_item_layers layer;        /* Layer of item */
 140         enum sfc_flow_item_layers prev_layer;   /* Previous layer of item */
 141         enum sfc_flow_parse_ctx_type ctx_type;  /* Parse context type */
 142         sfc_flow_item_parse *parse;             /* Parsing function */
 143 };
 144
 145 int sfc_flow_parse_pattern(const struct sfc_flow_item *flow_items,
 146                            unsigned int nb_flow_items,
 147                            const struct rte_flow_item pattern[],
 148                            struct sfc_flow_parse_ctx *parse_ctx,
 149                            struct rte_flow_error *error);
 150
 151 int sfc_flow_parse_init(const struct rte_flow_item *item,
 152                         const void **spec_ptr,
 153                         const void **mask_ptr,
 154                         const void *supp_mask,
 155                         const void *def_mask,
 156                         unsigned int size,
 157                         struct rte_flow_error *error);
 158
 159 struct sfc_adapter;
 160
 161 void sfc_flow_init(struct sfc_adapter *sa);
 162 void sfc_flow_fini(struct sfc_adapter *sa);
 163 int sfc_flow_start(struct sfc_adapter *sa);
 164 void sfc_flow_stop(struct sfc_adapter *sa);
 165
 166 typedef int (sfc_flow_parse_cb_t)(struct rte_eth_dev *dev,
 167                                   const struct rte_flow_item items[],
 168                                   const struct rte_flow_action actions[],
 169                                   struct rte_flow *flow,
 170                                   struct rte_flow_error *error);
 171
 172 typedef int (sfc_flow_verify_cb_t)(struct sfc_adapter *sa,
 173                                    struct rte_flow *flow);
 174
 175 typedef void (sfc_flow_cleanup_cb_t)(struct sfc_adapter *sa,
 176                                      struct rte_flow *flow);
 177
 178 typedef int (sfc_flow_insert_cb_t)(struct sfc_adapter *sa,
 179                                    struct rte_flow *flow);
 180
 181 typedef int (sfc_flow_remove_cb_t)(struct sfc_adapter *sa,
 182                                    struct rte_flow *flow);
 183
 184 typedef int (sfc_flow_query_cb_t)(struct rte_eth_dev *dev,
 185                                   struct rte_flow *flow,
 186                                   const struct rte_flow_action *action,
 187                                   void *data,
 188                                   struct rte_flow_error *error);
 189
 190 #ifdef __cplusplus
 191 }
 192 #endif
 193 #endif /* _SFC_FLOW_H */