1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 2/* Copyright (c) 2018 Mellanox Technologies. All rights reserved */ 3 4#include <linux/kernel.h> 5 6#include "spectrum.h" 7#include "spectrum_acl_tcam.h" 8#include "core_acl_flex_actions.h" 9 10struct mlxsw_sp2_acl_tcam { 11 struct mlxsw_sp_acl_atcam atcam; 12 u32 kvdl_index; 13 unsigned int kvdl_count; 14}; 15 16struct mlxsw_sp2_acl_tcam_region { 17 struct mlxsw_sp_acl_atcam_region aregion; 18 struct mlxsw_sp_acl_tcam_region *region; 19}; 20 21struct mlxsw_sp2_acl_tcam_chunk { 22 struct mlxsw_sp_acl_atcam_chunk achunk; 23}; 24 25struct mlxsw_sp2_acl_tcam_entry { 26 struct mlxsw_sp_acl_atcam_entry aentry; 27 struct mlxsw_afa_block *act_block; 28}; 29 30static int 31mlxsw_sp2_acl_ctcam_region_entry_insert(struct mlxsw_sp_acl_ctcam_region *cregion, 32 struct mlxsw_sp_acl_ctcam_entry *centry, 33 const char *mask) 34{ 35 struct mlxsw_sp_acl_atcam_region *aregion; 36 struct mlxsw_sp_acl_atcam_entry *aentry; 37 struct mlxsw_sp_acl_erp_mask *erp_mask; 38 39 aregion = mlxsw_sp_acl_tcam_cregion_aregion(cregion); 40 aentry = mlxsw_sp_acl_tcam_centry_aentry(centry); 41 42 erp_mask = mlxsw_sp_acl_erp_mask_get(aregion, mask, true); 43 if (IS_ERR(erp_mask)) 44 return PTR_ERR(erp_mask); 45 aentry->erp_mask = erp_mask; 46 47 return 0; 48} 49 50static void 51mlxsw_sp2_acl_ctcam_region_entry_remove(struct mlxsw_sp_acl_ctcam_region *cregion, 52 struct mlxsw_sp_acl_ctcam_entry *centry) 53{ 54 struct mlxsw_sp_acl_atcam_region *aregion; 55 struct mlxsw_sp_acl_atcam_entry *aentry; 56 57 aregion = mlxsw_sp_acl_tcam_cregion_aregion(cregion); 58 aentry = mlxsw_sp_acl_tcam_centry_aentry(centry); 59 60 mlxsw_sp_acl_erp_mask_put(aregion, aentry->erp_mask); 61} 62 63static const struct mlxsw_sp_acl_ctcam_region_ops 64mlxsw_sp2_acl_ctcam_region_ops = { 65 .entry_insert = mlxsw_sp2_acl_ctcam_region_entry_insert, 66 .entry_remove = mlxsw_sp2_acl_ctcam_region_entry_remove, 67}; 68 69static int mlxsw_sp2_acl_tcam_init(struct mlxsw_sp *mlxsw_sp, void *priv, 70 struct mlxsw_sp_acl_tcam *_tcam) 71{ 72 struct mlxsw_sp2_acl_tcam *tcam = priv; 73 struct mlxsw_afa_block *afa_block; 74 char pefa_pl[MLXSW_REG_PEFA_LEN]; 75 char pgcr_pl[MLXSW_REG_PGCR_LEN]; 76 char *enc_actions; 77 int i; 78 int err; 79 80 /* Some TCAM regions are not exposed to the host and used internally 81 * by the device. Allocate KVDL entries for the default actions of 82 * these regions to avoid the host from overwriting them. 83 */ 84 tcam->kvdl_count = _tcam->max_regions; 85 if (MLXSW_CORE_RES_VALID(mlxsw_sp->core, ACL_MAX_DEFAULT_ACTIONS)) 86 tcam->kvdl_count = MLXSW_CORE_RES_GET(mlxsw_sp->core, 87 ACL_MAX_DEFAULT_ACTIONS); 88 err = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ACTSET, 89 tcam->kvdl_count, &tcam->kvdl_index); 90 if (err) 91 return err; 92 93 /* Create flex action block, set default action (continue) 94 * but don't commit. We need just the current set encoding 95 * to be written using PEFA register to all indexes for all regions. 96 */ 97 afa_block = mlxsw_afa_block_create(mlxsw_sp->afa); 98 if (IS_ERR(afa_block)) { 99 err = PTR_ERR(afa_block); 100 goto err_afa_block; 101 } 102 err = mlxsw_afa_block_continue(afa_block); 103 if (WARN_ON(err)) 104 goto err_afa_block_continue; 105 enc_actions = mlxsw_afa_block_cur_set(afa_block); 106 107 /* Only write to KVDL entries used by TCAM regions exposed to the 108 * host. 109 */ 110 for (i = 0; i < _tcam->max_regions; i++) { 111 mlxsw_reg_pefa_pack(pefa_pl, tcam->kvdl_index + i, 112 true, enc_actions); 113 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pefa), pefa_pl); 114 if (err) 115 goto err_pefa_write; 116 } 117 mlxsw_reg_pgcr_pack(pgcr_pl, tcam->kvdl_index); 118 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pgcr), pgcr_pl); 119 if (err) 120 goto err_pgcr_write; 121 122 err = mlxsw_sp_acl_atcam_init(mlxsw_sp, &tcam->atcam); 123 if (err) 124 goto err_atcam_init; 125 126 mlxsw_afa_block_destroy(afa_block); 127 return 0; 128 129err_atcam_init: 130err_pgcr_write: 131err_pefa_write: 132err_afa_block_continue: 133 mlxsw_afa_block_destroy(afa_block); 134err_afa_block: 135 mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ACTSET, 136 tcam->kvdl_count, tcam->kvdl_index); 137 return err; 138} 139 140static void mlxsw_sp2_acl_tcam_fini(struct mlxsw_sp *mlxsw_sp, void *priv) 141{ 142 struct mlxsw_sp2_acl_tcam *tcam = priv; 143 144 mlxsw_sp_acl_atcam_fini(mlxsw_sp, &tcam->atcam); 145 mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ACTSET, 146 tcam->kvdl_count, tcam->kvdl_index); 147} 148 149static int 150mlxsw_sp2_acl_tcam_region_init(struct mlxsw_sp *mlxsw_sp, void *region_priv, 151 void *tcam_priv, 152 struct mlxsw_sp_acl_tcam_region *_region, 153 void *hints_priv) 154{ 155 struct mlxsw_sp2_acl_tcam_region *region = region_priv; 156 struct mlxsw_sp2_acl_tcam *tcam = tcam_priv; 157 158 region->region = _region; 159 160 return mlxsw_sp_acl_atcam_region_init(mlxsw_sp, &tcam->atcam, 161 ®ion->aregion, 162 _region, hints_priv, 163 &mlxsw_sp2_acl_ctcam_region_ops); 164} 165 166static void 167mlxsw_sp2_acl_tcam_region_fini(struct mlxsw_sp *mlxsw_sp, void *region_priv) 168{ 169 struct mlxsw_sp2_acl_tcam_region *region = region_priv; 170 171 mlxsw_sp_acl_atcam_region_fini(®ion->aregion); 172} 173 174static int 175mlxsw_sp2_acl_tcam_region_associate(struct mlxsw_sp *mlxsw_sp, 176 struct mlxsw_sp_acl_tcam_region *region) 177{ 178 return mlxsw_sp_acl_atcam_region_associate(mlxsw_sp, region->id); 179} 180 181static void *mlxsw_sp2_acl_tcam_region_rehash_hints_get(void *region_priv) 182{ 183 struct mlxsw_sp2_acl_tcam_region *region = region_priv; 184 185 return mlxsw_sp_acl_atcam_rehash_hints_get(®ion->aregion); 186} 187 188static void mlxsw_sp2_acl_tcam_region_rehash_hints_put(void *hints_priv) 189{ 190 mlxsw_sp_acl_atcam_rehash_hints_put(hints_priv); 191} 192 193static void mlxsw_sp2_acl_tcam_chunk_init(void *region_priv, void *chunk_priv, 194 unsigned int priority) 195{ 196 struct mlxsw_sp2_acl_tcam_region *region = region_priv; 197 struct mlxsw_sp2_acl_tcam_chunk *chunk = chunk_priv; 198 199 mlxsw_sp_acl_atcam_chunk_init(®ion->aregion, &chunk->achunk, 200 priority); 201} 202 203static void mlxsw_sp2_acl_tcam_chunk_fini(void *chunk_priv) 204{ 205 struct mlxsw_sp2_acl_tcam_chunk *chunk = chunk_priv; 206 207 mlxsw_sp_acl_atcam_chunk_fini(&chunk->achunk); 208} 209 210static int mlxsw_sp2_acl_tcam_entry_add(struct mlxsw_sp *mlxsw_sp, 211 void *region_priv, void *chunk_priv, 212 void *entry_priv, 213 struct mlxsw_sp_acl_rule_info *rulei) 214{ 215 struct mlxsw_sp2_acl_tcam_region *region = region_priv; 216 struct mlxsw_sp2_acl_tcam_chunk *chunk = chunk_priv; 217 struct mlxsw_sp2_acl_tcam_entry *entry = entry_priv; 218 219 entry->act_block = rulei->act_block; 220 return mlxsw_sp_acl_atcam_entry_add(mlxsw_sp, ®ion->aregion, 221 &chunk->achunk, &entry->aentry, 222 rulei); 223} 224 225static void mlxsw_sp2_acl_tcam_entry_del(struct mlxsw_sp *mlxsw_sp, 226 void *region_priv, void *chunk_priv, 227 void *entry_priv) 228{ 229 struct mlxsw_sp2_acl_tcam_region *region = region_priv; 230 struct mlxsw_sp2_acl_tcam_chunk *chunk = chunk_priv; 231 struct mlxsw_sp2_acl_tcam_entry *entry = entry_priv; 232 233 mlxsw_sp_acl_atcam_entry_del(mlxsw_sp, ®ion->aregion, &chunk->achunk, 234 &entry->aentry); 235} 236 237static int 238mlxsw_sp2_acl_tcam_entry_action_replace(struct mlxsw_sp *mlxsw_sp, 239 void *region_priv, void *entry_priv, 240 struct mlxsw_sp_acl_rule_info *rulei) 241{ 242 struct mlxsw_sp2_acl_tcam_region *region = region_priv; 243 struct mlxsw_sp2_acl_tcam_entry *entry = entry_priv; 244 245 entry->act_block = rulei->act_block; 246 return mlxsw_sp_acl_atcam_entry_action_replace(mlxsw_sp, 247 ®ion->aregion, 248 &entry->aentry, rulei); 249} 250 251static int 252mlxsw_sp2_acl_tcam_entry_activity_get(struct mlxsw_sp *mlxsw_sp, 253 void *region_priv, void *entry_priv, 254 bool *activity) 255{ 256 struct mlxsw_sp2_acl_tcam_entry *entry = entry_priv; 257 258 return mlxsw_afa_block_activity_get(entry->act_block, activity); 259} 260 261const struct mlxsw_sp_acl_tcam_ops mlxsw_sp2_acl_tcam_ops = { 262 .key_type = MLXSW_REG_PTAR_KEY_TYPE_FLEX2, 263 .priv_size = sizeof(struct mlxsw_sp2_acl_tcam), 264 .init = mlxsw_sp2_acl_tcam_init, 265 .fini = mlxsw_sp2_acl_tcam_fini, 266 .region_priv_size = sizeof(struct mlxsw_sp2_acl_tcam_region), 267 .region_init = mlxsw_sp2_acl_tcam_region_init, 268 .region_fini = mlxsw_sp2_acl_tcam_region_fini, 269 .region_associate = mlxsw_sp2_acl_tcam_region_associate, 270 .region_rehash_hints_get = mlxsw_sp2_acl_tcam_region_rehash_hints_get, 271 .region_rehash_hints_put = mlxsw_sp2_acl_tcam_region_rehash_hints_put, 272 .chunk_priv_size = sizeof(struct mlxsw_sp2_acl_tcam_chunk), 273 .chunk_init = mlxsw_sp2_acl_tcam_chunk_init, 274 .chunk_fini = mlxsw_sp2_acl_tcam_chunk_fini, 275 .entry_priv_size = sizeof(struct mlxsw_sp2_acl_tcam_entry), 276 .entry_add = mlxsw_sp2_acl_tcam_entry_add, 277 .entry_del = mlxsw_sp2_acl_tcam_entry_del, 278 .entry_action_replace = mlxsw_sp2_acl_tcam_entry_action_replace, 279 .entry_activity_get = mlxsw_sp2_acl_tcam_entry_activity_get, 280}; 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