drivers/net/mlx5/mlx5_flow_meter.c

   1 // SPDX-License-Identifier: BSD-3-Clause
   2 /*
   3  * Copyright 2018 Mellanox Technologies, Ltd
   4  */
   5 #include <math.h>
   6
   7 #include <rte_tailq.h>
   8 #include <rte_malloc.h>
   9 #include <rte_mtr.h>
  10 #include <rte_mtr_driver.h>
  11
  12 #include <mlx5_devx_cmds.h>
  13
  14 #include "mlx5.h"
  15 #include "mlx5_flow.h"
  16
  17 /**
  18  * Create the meter action.
  19  *
  20  * @param priv
  21  *   Pointer to mlx5_priv.
  22  * @param[in] fm
  23  *   Pointer to flow meter to be converted.
  24  *
  25  * @return
  26  *   Pointer to the meter action on success, NULL otherwise.
  27  */
  28 static void *
  29 mlx5_flow_meter_action_create(struct mlx5_priv *priv,
  30                               struct mlx5_flow_meter *fm)
  31 {
  32 #ifdef HAVE_MLX5_DR_CREATE_ACTION_FLOW_METER
  33         struct mlx5dv_dr_flow_meter_attr mtr_init;
  34         void *attr = fm->mfts->fmp;
  35         struct mlx5_flow_meter_srtcm_rfc2697_prm *srtcm =
  36                                                      &fm->profile->srtcm_prm;
  37
  38         fm->mfts->fmp_size = MLX5_ST_SZ_BYTES(flow_meter_parameters);
  39         memset(attr, 0, fm->mfts->fmp_size);
  40         MLX5_SET(flow_meter_parameters, attr, valid, 1);
  41         MLX5_SET(flow_meter_parameters, attr, bucket_overflow, 1);
  42         MLX5_SET(flow_meter_parameters, attr,
  43                  start_color, MLX5_FLOW_COLOR_GREEN);
  44         MLX5_SET(flow_meter_parameters, attr, both_buckets_on_green, 0);
  45         MLX5_SET(flow_meter_parameters,
  46                  attr, cbs_exponent, srtcm->cbs_exponent);
  47         MLX5_SET(flow_meter_parameters,
  48                  attr, cbs_mantissa, srtcm->cbs_mantissa);
  49         MLX5_SET(flow_meter_parameters,
  50                  attr, cir_exponent, srtcm->cir_exponent);
  51         MLX5_SET(flow_meter_parameters,
  52                  attr, cir_mantissa, srtcm->cir_mantissa);
  53         MLX5_SET(flow_meter_parameters,
  54                  attr, ebs_exponent, srtcm->ebs_exponent);
  55         MLX5_SET(flow_meter_parameters,
  56                  attr, ebs_mantissa, srtcm->ebs_mantissa);
  57         mtr_init.next_table =
  58                 fm->attr.transfer ? fm->mfts->transfer.tbl->obj :
  59                     fm->attr.egress ? fm->mfts->egress.tbl->obj :
  60                                        fm->mfts->ingress.tbl->obj;
  61         mtr_init.reg_c_index = priv->mtr_color_reg - REG_C_0;
  62         mtr_init.flow_meter_parameter = fm->mfts->fmp;
  63         mtr_init.flow_meter_parameter_sz = fm->mfts->fmp_size;
  64         mtr_init.active = fm->active_state;
  65         return mlx5_glue->dv_create_flow_action_meter(&mtr_init);
  66 #else
  67         (void)priv;
  68         (void)fm;
  69         return NULL;
  70 #endif
  71 }
  72
  73 /**
  74  * Find meter profile by id.
  75  *
  76  * @param priv
  77  *   Pointer to mlx5_priv.
  78  * @param meter_profile_id
  79  *   Meter profile id.
  80  *
  81  * @return
  82  *   Pointer to the profile found on success, NULL otherwise.
  83  */
  84 static struct mlx5_flow_meter_profile *
  85 mlx5_flow_meter_profile_find(struct mlx5_priv *priv, uint32_t meter_profile_id)
  86 {
  87         struct mlx5_mtr_profiles *fmps = &priv->flow_meter_profiles;
  88         struct mlx5_flow_meter_profile *fmp;
  89
  90         TAILQ_FOREACH(fmp, fmps, next)
  91                 if (meter_profile_id == fmp->meter_profile_id)
  92                         return fmp;
  93         return NULL;
  94 }
  95
  96 /**
  97  * Validate the MTR profile.
  98  *
  99  * @param[in] dev
 100  *   Pointer to Ethernet device.
 101  * @param[in] meter_profile_id
 102  *   Meter profile id.
 103  * @param[in] profile
 104  *   Pointer to meter profile detail.
 105  * @param[out] error
 106  *   Pointer to the error structure.
 107  *
 108  * @return
 109  *   0 on success, a negative errno value otherwise and rte_errno is set.
 110  */
 111 static int
 112 mlx5_flow_meter_profile_validate(struct rte_eth_dev *dev,
 113                                  uint32_t meter_profile_id,
 114                                  struct rte_mtr_meter_profile *profile,
 115                                  struct rte_mtr_error *error)
 116 {
 117         struct mlx5_priv *priv = dev->data->dev_private;
 118         struct mlx5_flow_meter_profile *fmp;
 119
 120         /* Profile must not be NULL. */
 121         if (profile == NULL)
 122                 return -rte_mtr_error_set(error, EINVAL,
 123                                           RTE_MTR_ERROR_TYPE_METER_PROFILE,
 124                                           NULL, "Meter profile is null.");
 125         /* Meter profile ID must be valid. */
 126         if (meter_profile_id == UINT32_MAX)
 127                 return -rte_mtr_error_set(error, EINVAL,
 128                                           RTE_MTR_ERROR_TYPE_METER_PROFILE_ID,
 129                                           NULL, "Meter profile id not valid.");
 130         /* Meter profile must not exist. */
 131         fmp = mlx5_flow_meter_profile_find(priv, meter_profile_id);
 132         if (fmp)
 133                 return -rte_mtr_error_set(error, EEXIST,
 134                                           RTE_MTR_ERROR_TYPE_METER_PROFILE_ID,
 135                                           NULL,
 136                                           "Meter profile already exists.");
 137         if (profile->alg == RTE_MTR_SRTCM_RFC2697) {
 138                 if (priv->config.hca_attr.qos.srtcm_sup) {
 139                         /* Verify support for flow meter parameters. */
 140                         if (profile->srtcm_rfc2697.cir > 0 &&
 141                             profile->srtcm_rfc2697.cir <= MLX5_SRTCM_CIR_MAX &&
 142                             profile->srtcm_rfc2697.cbs > 0 &&
 143                             profile->srtcm_rfc2697.cbs <= MLX5_SRTCM_CBS_MAX &&
 144                             profile->srtcm_rfc2697.ebs <= MLX5_SRTCM_EBS_MAX)
 145                                 return 0;
 146                         else
 147                                 return -rte_mtr_error_set
 148                                              (error, ENOTSUP,
 149                                               RTE_MTR_ERROR_TYPE_MTR_PARAMS,
 150                                               NULL,
 151                                               profile->srtcm_rfc2697.ebs ?
 152                                               "Metering value ebs must be 0." :
 153                                               "Invalid metering parameters.");
 154                 }
 155         }
 156         return -rte_mtr_error_set(error, ENOTSUP,
 157                                   RTE_MTR_ERROR_TYPE_METER_PROFILE,
 158                                   NULL, "Metering algorithm not supported.");
 159 }
 160
 161 /**
 162  * Calculate mantissa and exponent for cir.
 163  *
 164  * @param[in] cir
 165  *   Value to be calculated.
 166  * @param[out] man
 167  *   Pointer to the mantissa.
 168  * @param[out] exp
 169  *   Pointer to the exp.
 170  */
 171 static void
 172 mlx5_flow_meter_cir_man_exp_calc(int64_t cir, uint8_t *man, uint8_t *exp)
 173 {
 174         int64_t _cir;
 175         int64_t delta = INT64_MAX;
 176         uint8_t _man = 0;
 177         uint8_t _exp = 0;
 178         uint64_t m, e;
 179
 180         for (m = 0; m <= 0xFF; m++) { /* man width 8 bit */
 181                 for (e = 0; e <= 0x1F; e++) { /* exp width 5bit */
 182                         _cir = (1000000000ULL * m) >> e;
 183                         if (llabs(cir - _cir) <= delta) {
 184                                 delta = llabs(cir - _cir);
 185                                 _man = m;
 186                                 _exp = e;
 187                         }
 188                 }
 189         }
 190         *man = _man;
 191         *exp = _exp;
 192 }
 193
 194 /**
 195  * Calculate mantissa and exponent for xbs.
 196  *
 197  * @param[in] xbs
 198  *   Value to be calculated.
 199  * @param[out] man
 200  *   Pointer to the mantissa.
 201  * @param[out] exp
 202  *   Pointer to the exp.
 203  */
 204 static void
 205 mlx5_flow_meter_xbs_man_exp_calc(uint64_t xbs, uint8_t *man, uint8_t *exp)
 206 {
 207         int _exp;
 208         double _man;
 209
 210         /* Special case xbs == 0 ? both exp and matissa are 0. */
 211         if (xbs == 0) {
 212                 *man = 0;
 213                 *exp = 0;
 214                 return;
 215         }
 216         /* xbs = xbs_mantissa * 2^xbs_exponent */
 217         _man = frexp(xbs, &_exp);
 218         _man = _man * pow(2, MLX5_MAN_WIDTH);
 219         _exp = _exp - MLX5_MAN_WIDTH;
 220         *man = (uint8_t)ceil(_man);
 221         *exp = _exp;
 222 }
 223
 224 /**
 225  * Fill the prm meter parameter.
 226  *
 227  * @param[in,out] fmp
 228  *   Pointer to meter profie to be converted.
 229  * @param[out] error
 230  *   Pointer to the error structure.
 231  *
 232  * @return
 233  *   0 on success, a negative errno value otherwise and rte_errno is set.
 234  */
 235 static int
 236 mlx5_flow_meter_param_fill(struct mlx5_flow_meter_profile *fmp,
 237                           struct rte_mtr_error *error)
 238 {
 239         struct mlx5_flow_meter_srtcm_rfc2697_prm *srtcm = &fmp->srtcm_prm;
 240         uint8_t man, exp;
 241
 242         if (fmp->profile.alg != RTE_MTR_SRTCM_RFC2697)
 243                 return -rte_mtr_error_set(error, ENOTSUP,
 244                                 RTE_MTR_ERROR_TYPE_METER_PROFILE,
 245                                 NULL, "Metering algorithm not supported.");
 246          /* cbs = cbs_mantissa * 2^cbs_exponent */
 247         mlx5_flow_meter_xbs_man_exp_calc(fmp->profile.srtcm_rfc2697.cbs,
 248                                     &man, &exp);
 249         srtcm->cbs_mantissa = man;
 250         srtcm->cbs_exponent = exp;
 251         /* Check if cbs mantissa is too large. */
 252         if (srtcm->cbs_exponent != exp)
 253                 return -rte_mtr_error_set(error, EINVAL,
 254                                           RTE_MTR_ERROR_TYPE_MTR_PARAMS, NULL,
 255                                           "Metering profile parameter cbs is"
 256                                           " invalid.");
 257         /* ebs = ebs_mantissa * 2^ebs_exponent */
 258         mlx5_flow_meter_xbs_man_exp_calc(fmp->profile.srtcm_rfc2697.ebs,
 259                                     &man, &exp);
 260         srtcm->ebs_mantissa = man;
 261         srtcm->ebs_exponent = exp;
 262         /* Check if ebs mantissa is too large. */
 263         if (srtcm->ebs_exponent != exp)
 264                 return -rte_mtr_error_set(error, EINVAL,
 265                                           RTE_MTR_ERROR_TYPE_MTR_PARAMS, NULL,
 266                                           "Metering profile parameter ebs is"
 267                                           " invalid.");
 268         /* cir = 8G * cir_mantissa * 1/(2^cir_exponent)) Bytes/Sec */
 269         mlx5_flow_meter_cir_man_exp_calc(fmp->profile.srtcm_rfc2697.cir,
 270                                     &man, &exp);
 271         srtcm->cir_mantissa = man;
 272         srtcm->cir_exponent = exp;
 273         /* Check if cir mantissa is too large. */
 274         if (srtcm->cir_exponent != exp)
 275                 return -rte_mtr_error_set(error, EINVAL,
 276                                           RTE_MTR_ERROR_TYPE_MTR_PARAMS, NULL,
 277                                           "Metering profile parameter cir is"
 278                                           " invalid.");
 279         return 0;
 280 }
 281
 282 /**
 283  * Callback to get MTR capabilities.
 284  *
 285  * @param[in] dev
 286  *   Pointer to Ethernet device.
 287  * @param[out] cap
 288  *   Pointer to save MTR capabilities.
 289  * @param[out] error
 290  *   Pointer to the error structure.
 291  *
 292  * @return
 293  *   0 on success, a negative errno value otherwise and rte_errno is set.
 294  */
 295 static int
 296 mlx5_flow_mtr_cap_get(struct rte_eth_dev *dev,
 297                  struct rte_mtr_capabilities *cap,
 298                  struct rte_mtr_error *error __rte_unused)
 299 {
 300         struct mlx5_priv *priv = dev->data->dev_private;
 301         struct mlx5_hca_qos_attr *qattr = &priv->config.hca_attr.qos;
 302
 303         if (!priv->mtr_en)
 304                 return -rte_mtr_error_set(error, ENOTSUP,
 305                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 306                                           "Meter is not support");
 307         memset(cap, 0, sizeof(*cap));
 308         cap->n_max = 1 << qattr->log_max_flow_meter;
 309         cap->n_shared_max = cap->n_max;
 310         cap->identical = 1;
 311         cap->shared_identical = 1;
 312         cap->shared_n_flows_per_mtr_max = 4 << 20;
 313         /* 2M flows can share the same meter. */
 314         cap->chaining_n_mtrs_per_flow_max = 1; /* Chaining is not supported. */
 315         cap->meter_srtcm_rfc2697_n_max = qattr->srtcm_sup ? cap->n_max : 0;
 316         cap->meter_rate_max = 1ULL << 40; /* 1 Tera tokens per sec. */
 317         cap->policer_action_drop_supported = 1;
 318         cap->stats_mask = RTE_MTR_STATS_N_BYTES_DROPPED |
 319                           RTE_MTR_STATS_N_PKTS_DROPPED;
 320         return 0;
 321 }
 322
 323 /**
 324  * Callback to add MTR profile.
 325  *
 326  * @param[in] dev
 327  *   Pointer to Ethernet device.
 328  * @param[in] meter_profile_id
 329  *   Meter profile id.
 330  * @param[in] profile
 331  *   Pointer to meter profile detail.
 332  * @param[out] error
 333  *   Pointer to the error structure.
 334  *
 335  * @return
 336  *   0 on success, a negative errno value otherwise and rte_errno is set.
 337  */
 338 static int
 339 mlx5_flow_meter_profile_add(struct rte_eth_dev *dev,
 340                        uint32_t meter_profile_id,
 341                        struct rte_mtr_meter_profile *profile,
 342                        struct rte_mtr_error *error)
 343 {
 344         struct mlx5_priv *priv = dev->data->dev_private;
 345         struct mlx5_mtr_profiles *fmps = &priv->flow_meter_profiles;
 346         struct mlx5_flow_meter_profile *fmp;
 347         int ret;
 348
 349         if (!priv->mtr_en)
 350                 return -rte_mtr_error_set(error, ENOTSUP,
 351                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 352                                           "Meter is not support");
 353         /* Check input params. */
 354         ret = mlx5_flow_meter_profile_validate(dev, meter_profile_id,
 355                                                profile, error);
 356         if (ret)
 357                 return ret;
 358         /* Meter profile memory allocation. */
 359         fmp = rte_calloc(__func__, 1, sizeof(struct mlx5_flow_meter_profile),
 360                          RTE_CACHE_LINE_SIZE);
 361         if (fmp == NULL)
 362                 return -rte_mtr_error_set(error, ENOMEM,
 363                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED,
 364                                           NULL, "Meter profile memory "
 365                                           "alloc failed.");
 366         /* Fill profile info. */
 367         fmp->meter_profile_id = meter_profile_id;
 368         fmp->profile = *profile;
 369         /* Fill the flow meter parameters for the PRM. */
 370         ret = mlx5_flow_meter_param_fill(fmp, error);
 371         if (ret)
 372                 goto error;
 373         /* Add to list. */
 374         TAILQ_INSERT_TAIL(fmps, fmp, next);
 375         return 0;
 376 error:
 377         rte_free(fmp);
 378         return ret;
 379 }
 380
 381 /**
 382  * Callback to delete MTR profile.
 383  *
 384  * @param[in] dev
 385  *   Pointer to Ethernet device.
 386  * @param[in] meter_profile_id
 387  *   Meter profile id.
 388  * @param[out] error
 389  *   Pointer to the error structure.
 390  *
 391  * @return
 392  *   0 on success, a negative errno value otherwise and rte_errno is set.
 393  */
 394 static int
 395 mlx5_flow_meter_profile_delete(struct rte_eth_dev *dev,
 396                           uint32_t meter_profile_id,
 397                           struct rte_mtr_error *error)
 398 {
 399         struct mlx5_priv *priv = dev->data->dev_private;
 400         struct mlx5_flow_meter_profile *fmp;
 401
 402         if (!priv->mtr_en)
 403                 return -rte_mtr_error_set(error, ENOTSUP,
 404                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 405                                           "Meter is not support");
 406         /* Meter profile must exist. */
 407         fmp = mlx5_flow_meter_profile_find(priv, meter_profile_id);
 408         if (fmp == NULL)
 409                 return -rte_mtr_error_set(error, ENOENT,
 410                                           RTE_MTR_ERROR_TYPE_METER_PROFILE_ID,
 411                                           &meter_profile_id,
 412                                           "Meter profile id invalid.");
 413         /* Check profile is unused. */
 414         if (fmp->ref_cnt)
 415                 return -rte_mtr_error_set(error, EBUSY,
 416                                           RTE_MTR_ERROR_TYPE_METER_PROFILE_ID,
 417                                           NULL, "Meter profile in use.");
 418         /* Remove from list. */
 419         TAILQ_REMOVE(&priv->flow_meter_profiles, fmp, next);
 420         rte_free(fmp);
 421         return 0;
 422 }
 423
 424 /**
 425  * Convert wrong color setting action to verbose error.
 426  *
 427  * @param[in] action
 428  *   Policy color action.
 429  *
 430  * @return
 431  *   Verbose meter color error type.
 432  */
 433 static inline enum rte_mtr_error_type
 434 action2error(enum rte_mtr_policer_action action)
 435 {
 436         switch (action) {
 437         case MTR_POLICER_ACTION_COLOR_GREEN:
 438                 return RTE_MTR_ERROR_TYPE_POLICER_ACTION_GREEN;
 439         case MTR_POLICER_ACTION_COLOR_YELLOW:
 440                 return RTE_MTR_ERROR_TYPE_POLICER_ACTION_YELLOW;
 441         case MTR_POLICER_ACTION_COLOR_RED:
 442                 return RTE_MTR_ERROR_TYPE_POLICER_ACTION_RED;
 443         default:
 444                 break;
 445         }
 446         return RTE_MTR_ERROR_TYPE_UNSPECIFIED;
 447 }
 448
 449 /**
 450  * Check meter validation.
 451  *
 452  * @param[in] priv
 453  *   Pointer to mlx5 private data structure.
 454  * @param[in] meter_id
 455  *   Meter id.
 456  * @param[in] params
 457  *   Pointer to rte meter parameters.
 458  * @param[out] error
 459  *   Pointer to rte meter error structure.
 460  *
 461  * @return
 462  *   0 on success, a negative errno value otherwise and rte_errno is set.
 463  */
 464 static int
 465 mlx5_flow_meter_validate(struct mlx5_priv *priv, uint32_t meter_id,
 466                          struct rte_mtr_params *params,
 467                          struct rte_mtr_error *error)
 468 {
 469         static enum rte_mtr_policer_action
 470                                 valid_recol_action[RTE_COLORS] = {
 471                                                MTR_POLICER_ACTION_COLOR_GREEN,
 472                                                MTR_POLICER_ACTION_COLOR_YELLOW,
 473                                                MTR_POLICER_ACTION_COLOR_RED };
 474         int i;
 475
 476         /* Meter params must not be NULL. */
 477         if (params == NULL)
 478                 return -rte_mtr_error_set(error, EINVAL,
 479                                           RTE_MTR_ERROR_TYPE_MTR_PARAMS,
 480                                           NULL, "Meter object params null.");
 481         /* Previous meter color is not supported. */
 482         if (params->use_prev_mtr_color)
 483                 return -rte_mtr_error_set(error, ENOTSUP,
 484                                           RTE_MTR_ERROR_TYPE_MTR_PARAMS,
 485                                           NULL,
 486                                           "Previous meter color "
 487                                           "not supported.");
 488         /* Validate policer settings. */
 489         for (i = 0; i < RTE_COLORS; i++)
 490                 if (params->action[i] != valid_recol_action[i] &&
 491                     params->action[i] != MTR_POLICER_ACTION_DROP)
 492                         return -rte_mtr_error_set
 493                                         (error, ENOTSUP,
 494                                          action2error(params->action[i]), NULL,
 495                                          "Recolor action not supported.");
 496         /* Validate meter id. */
 497         if (mlx5_flow_meter_find(priv, meter_id))
 498                 return -rte_mtr_error_set(error, EEXIST,
 499                                           RTE_MTR_ERROR_TYPE_MTR_ID, NULL,
 500                                           "Meter object already exists.");
 501         return 0;
 502 }
 503
 504 /**
 505  * Modify the flow meter action.
 506  *
 507  * @param[in] priv
 508  *   Pointer to mlx5 private data structure.
 509  * @param[in] fm
 510  *   Pointer to flow meter to be modified.
 511  * @param[in] srtcm
 512  *   Pointer to meter srtcm description parameter.
 513  * @param[in] modify_bits
 514  *   The bit in srtcm to be updated.
 515  * @param[in] active_state
 516  *   The state to be updated.
 517  * @return
 518  *   0 on success, o negative value otherwise.
 519  */
 520 static int
 521 mlx5_flow_meter_action_modify(struct mlx5_priv *priv,
 522                 struct mlx5_flow_meter *fm,
 523                 const struct mlx5_flow_meter_srtcm_rfc2697_prm *srtcm,
 524                 uint64_t modify_bits, uint32_t active_state)
 525 {
 526 #ifdef HAVE_MLX5_DR_CREATE_ACTION_FLOW_METER
 527         uint32_t in[MLX5_ST_SZ_DW(flow_meter_parameters)] = { 0 };
 528         uint32_t *attr;
 529         struct mlx5dv_dr_flow_meter_attr mod_attr = { 0 };
 530         int ret;
 531
 532         /* Fill command parameters. */
 533         mod_attr.reg_c_index = priv->mtr_color_reg - REG_C_0;
 534         mod_attr.flow_meter_parameter = in;
 535         mod_attr.flow_meter_parameter_sz = fm->mfts->fmp_size;
 536         if (modify_bits & MLX5_FLOW_METER_OBJ_MODIFY_FIELD_ACTIVE)
 537                 mod_attr.active = !!active_state;
 538         else
 539                 mod_attr.active = 0;
 540         attr = in;
 541         if (modify_bits & MLX5_FLOW_METER_OBJ_MODIFY_FIELD_CBS) {
 542                 MLX5_SET(flow_meter_parameters,
 543                          attr, cbs_exponent, srtcm->cbs_exponent);
 544                 MLX5_SET(flow_meter_parameters,
 545                          attr, cbs_mantissa, srtcm->cbs_mantissa);
 546         }
 547         if (modify_bits & MLX5_FLOW_METER_OBJ_MODIFY_FIELD_CIR) {
 548                 MLX5_SET(flow_meter_parameters,
 549                          attr, cir_exponent, srtcm->cir_exponent);
 550                 MLX5_SET(flow_meter_parameters,
 551                          attr, cir_mantissa, srtcm->cir_mantissa);
 552         }
 553         if (modify_bits & MLX5_FLOW_METER_OBJ_MODIFY_FIELD_EBS) {
 554                 MLX5_SET(flow_meter_parameters,
 555                          attr, ebs_exponent, srtcm->ebs_exponent);
 556                 MLX5_SET(flow_meter_parameters,
 557                          attr, ebs_mantissa, srtcm->ebs_mantissa);
 558         }
 559         /* Apply modifications to meter only if it was created. */
 560         if (fm->mfts->meter_action) {
 561                 ret = mlx5_glue->dv_modify_flow_action_meter
 562                                         (fm->mfts->meter_action, &mod_attr,
 563                                         rte_cpu_to_be_64(modify_bits));
 564                 if (ret)
 565                         return ret;
 566         }
 567         /* Update succeedded modify meter parameters. */
 568         if (modify_bits & MLX5_FLOW_METER_OBJ_MODIFY_FIELD_ACTIVE)
 569                 fm->active_state = !!active_state;
 570         attr = fm->mfts->fmp;
 571         if (modify_bits & MLX5_FLOW_METER_OBJ_MODIFY_FIELD_CBS) {
 572                 MLX5_SET(flow_meter_parameters,
 573                          attr, cbs_exponent, srtcm->cbs_exponent);
 574                 MLX5_SET(flow_meter_parameters,
 575                          attr, cbs_mantissa, srtcm->cbs_mantissa);
 576         }
 577         if (modify_bits & MLX5_FLOW_METER_OBJ_MODIFY_FIELD_CIR) {
 578                 MLX5_SET(flow_meter_parameters,
 579                          attr, cir_exponent, srtcm->cir_exponent);
 580                 MLX5_SET(flow_meter_parameters,
 581                          attr, cir_mantissa, srtcm->cir_mantissa);
 582         }
 583         if (modify_bits & MLX5_FLOW_METER_OBJ_MODIFY_FIELD_EBS) {
 584                 MLX5_SET(flow_meter_parameters,
 585                          attr, ebs_exponent, srtcm->ebs_exponent);
 586                 MLX5_SET(flow_meter_parameters,
 587                          attr, ebs_mantissa, srtcm->ebs_mantissa);
 588         }
 589
 590         return 0;
 591 #else
 592         (void)priv;
 593         (void)fm;
 594         (void)srtcm;
 595         (void)modify_bits;
 596         (void)active_state;
 597         return -ENOTSUP;
 598 #endif
 599 }
 600
 601 /**
 602  * Create meter rules.
 603  *
 604  * @param[in] dev
 605  *   Pointer to Ethernet device.
 606  * @param[in] meter_id
 607  *   Meter id.
 608  * @param[in] params
 609  *   Pointer to rte meter parameters.
 610  * @param[in] shared
 611  *   Meter shared with other flow or not.
 612  * @param[out] error
 613  *   Pointer to rte meter error structure.
 614  *
 615  * @return
 616  *   0 on success, a negative errno value otherwise and rte_errno is set.
 617  */
 618 static int
 619 mlx5_flow_meter_create(struct rte_eth_dev *dev, uint32_t meter_id,
 620                        struct rte_mtr_params *params, int shared,
 621                        struct rte_mtr_error *error)
 622 {
 623         struct mlx5_priv *priv = dev->data->dev_private;
 624         struct mlx5_flow_meters *fms = &priv->flow_meters;
 625         struct mlx5_flow_meter_profile *fmp;
 626         struct mlx5_flow_meter *fm;
 627         const struct rte_flow_attr attr = {
 628                                 .ingress = 1,
 629                                 .egress = 1,
 630                                 .transfer = priv->config.dv_esw_en ? 1 : 0,
 631                         };
 632         int ret;
 633         unsigned int i;
 634
 635         if (!priv->mtr_en)
 636                 return -rte_mtr_error_set(error, ENOTSUP,
 637                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 638                                           "Meter is not support");
 639         /* Validate the parameters. */
 640         ret = mlx5_flow_meter_validate(priv, meter_id, params, error);
 641         if (ret)
 642                 return ret;
 643         /* Meter profile must exist. */
 644         fmp = mlx5_flow_meter_profile_find(priv, params->meter_profile_id);
 645         if (fmp == NULL)
 646                 return -rte_mtr_error_set(error, ENOENT,
 647                                           RTE_MTR_ERROR_TYPE_METER_PROFILE_ID,
 648                                           NULL, "Meter profile id not valid.");
 649         /* Allocate the flow meter memory. */
 650         fm = rte_calloc(__func__, 1,
 651                         sizeof(struct mlx5_flow_meter), RTE_CACHE_LINE_SIZE);
 652         if (fm == NULL)
 653                 return -rte_mtr_error_set(error, ENOMEM,
 654                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 655                                           "Memory alloc failed for meter.");
 656         /* Fill the flow meter parameters. */
 657         fm->meter_id = meter_id;
 658         fm->profile = fmp;
 659         fm->params = *params;
 660         /* Alloc policer counters. */
 661         for (i = 0; i < RTE_DIM(fm->policer_stats.cnt); i++) {
 662                 fm->policer_stats.cnt[i] = mlx5_counter_alloc(dev);
 663                 if (!fm->policer_stats.cnt[i])
 664                         goto error;
 665         }
 666         fm->mfts = mlx5_flow_create_mtr_tbls(dev, fm);
 667         if (!fm->mfts)
 668                 goto error;
 669         ret = mlx5_flow_create_policer_rules(dev, fm, &attr);
 670         if (ret)
 671                 goto error;
 672         /* Add to the flow meter list. */
 673         TAILQ_INSERT_TAIL(fms, fm, next);
 674         fm->active_state = 1; /* Config meter starts as active. */
 675         fm->shared = !!shared;
 676         fm->policer_stats.stats_mask = params->stats_mask;
 677         fm->profile->ref_cnt++;
 678         return 0;
 679 error:
 680         mlx5_flow_destroy_policer_rules(dev, fm, &attr);
 681         mlx5_flow_destroy_mtr_tbls(dev, fm->mfts);
 682         /* Free policer counters. */
 683         for (i = 0; i < RTE_DIM(fm->policer_stats.cnt); i++)
 684                 if (fm->policer_stats.cnt[i])
 685                         mlx5_counter_free(dev, fm->policer_stats.cnt[i]);
 686         rte_free(fm);
 687         return -rte_mtr_error_set(error, -ret,
 688                                   RTE_MTR_ERROR_TYPE_UNSPECIFIED,
 689                                   NULL, "Failed to create devx meter.");
 690 }
 691
 692 /**
 693  * Destroy meter rules.
 694  *
 695  * @param[in] dev
 696  *   Pointer to Ethernet device.
 697  * @param[in] meter_id
 698  *   Meter id.
 699  * @param[out] error
 700  *   Pointer to rte meter error structure.
 701  *
 702  * @return
 703  *   0 on success, a negative errno value otherwise and rte_errno is set.
 704  */
 705 static int
 706 mlx5_flow_meter_destroy(struct rte_eth_dev *dev, uint32_t meter_id,
 707                         struct rte_mtr_error *error)
 708 {
 709         struct mlx5_priv *priv = dev->data->dev_private;
 710         struct mlx5_flow_meters *fms = &priv->flow_meters;
 711         struct mlx5_flow_meter_profile *fmp;
 712         struct mlx5_flow_meter *fm;
 713         const struct rte_flow_attr attr = {
 714                                 .ingress = 1,
 715                                 .egress = 1,
 716                                 .transfer = priv->config.dv_esw_en ? 1 : 0,
 717                         };
 718         unsigned int i;
 719
 720         if (!priv->mtr_en)
 721                 return -rte_mtr_error_set(error, ENOTSUP,
 722                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 723                                           "Meter is not support");
 724         /* Meter object must exist. */
 725         fm = mlx5_flow_meter_find(priv, meter_id);
 726         if (fm == NULL)
 727                 return -rte_mtr_error_set(error, ENOENT,
 728                                           RTE_MTR_ERROR_TYPE_MTR_ID,
 729                                           NULL, "Meter object id not valid.");
 730         /* Meter object must not have any owner. */
 731         if (fm->ref_cnt > 0)
 732                 return -rte_mtr_error_set(error, EBUSY,
 733                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED,
 734                                           NULL, "Meter object is being used.");
 735         /* Get the meter profile. */
 736         fmp = fm->profile;
 737         RTE_ASSERT(fmp);
 738         /* Update dependencies. */
 739         fmp->ref_cnt--;
 740         /* Remove from the flow meter list. */
 741         TAILQ_REMOVE(fms, fm, next);
 742         /* Free policer counters. */
 743         for (i = 0; i < RTE_DIM(fm->policer_stats.cnt); i++)
 744                 if (fm->policer_stats.cnt[i])
 745                         mlx5_counter_free(dev, fm->policer_stats.cnt[i]);
 746         /* Free meter flow table */
 747         mlx5_flow_destroy_policer_rules(dev, fm, &attr);
 748         mlx5_flow_destroy_mtr_tbls(dev, fm->mfts);
 749         rte_free(fm);
 750         return 0;
 751 }
 752
 753 /**
 754  * Modify meter state.
 755  *
 756  * @param[in] priv
 757  *   Pointer to mlx5 private data structure.
 758  * @param[in] fm
 759  *   Pointer to flow meter.
 760  * @param[in] new_state
 761  *   New state to update.
 762  * @param[out] error
 763  *   Pointer to rte meter error structure.
 764  *
 765  * @return
 766  *   0 on success, a negative errno value otherwise and rte_errno is set.
 767  */
 768 static int
 769 mlx5_flow_meter_modify_state(struct mlx5_priv *priv,
 770                              struct mlx5_flow_meter *fm,
 771                              uint32_t new_state,
 772                              struct rte_mtr_error *error)
 773 {
 774         static const struct mlx5_flow_meter_srtcm_rfc2697_prm srtcm = {
 775                 .cbs_exponent = 20,
 776                 .cbs_mantissa = 191,
 777                 .cir_exponent = 0,
 778                 .cir_mantissa = 200,
 779                 .ebs_exponent = 0,
 780                 .ebs_mantissa = 0,
 781         };
 782         uint64_t modify_bits = MLX5_FLOW_METER_OBJ_MODIFY_FIELD_CBS |
 783                                MLX5_FLOW_METER_OBJ_MODIFY_FIELD_CIR;
 784         int ret;
 785
 786         if (new_state == MLX5_FLOW_METER_DISABLE)
 787                 ret = mlx5_flow_meter_action_modify(priv, fm, &srtcm,
 788                                                     modify_bits, 0);
 789         else
 790                 ret = mlx5_flow_meter_action_modify(priv, fm,
 791                                                    &fm->profile->srtcm_prm,
 792                                                     modify_bits, 0);
 793         if (ret)
 794                 return -rte_mtr_error_set(error, -ret,
 795                                           RTE_MTR_ERROR_TYPE_MTR_PARAMS,
 796                                           NULL,
 797                                           new_state ?
 798                                           "Failed to enable meter." :
 799                                           "Failed to disable meter.");
 800         return 0;
 801 }
 802
 803 /**
 804  * Callback to enable flow meter.
 805  *
 806  * @param[in] dev
 807  *   Pointer to Ethernet device.
 808  * @param[in] meter_id
 809  *   Meter id.
 810  * @param[out] error
 811  *   Pointer to rte meter error structure.
 812  *
 813  * @return
 814  *   0 on success, a negative errno value otherwise and rte_errno is set.
 815  */
 816 static int
 817 mlx5_flow_meter_enable(struct rte_eth_dev *dev,
 818                        uint32_t meter_id,
 819                        struct rte_mtr_error *error)
 820 {
 821         struct mlx5_priv *priv = dev->data->dev_private;
 822         struct mlx5_flow_meter *fm;
 823         int ret;
 824
 825         if (!priv->mtr_en)
 826                 return -rte_mtr_error_set(error, ENOTSUP,
 827                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 828                                           "Meter is not support");
 829         /* Meter object must exist. */
 830         fm = mlx5_flow_meter_find(priv, meter_id);
 831         if (fm == NULL)
 832                 return -rte_mtr_error_set(error, ENOENT,
 833                                           RTE_MTR_ERROR_TYPE_MTR_ID,
 834                                           NULL, "Meter not found.");
 835         if (fm->active_state == MLX5_FLOW_METER_ENABLE)
 836                 return 0;
 837         ret = mlx5_flow_meter_modify_state(priv, fm, MLX5_FLOW_METER_ENABLE,
 838                                            error);
 839         if (!ret)
 840                 fm->active_state = MLX5_FLOW_METER_ENABLE;
 841         return ret;
 842 }
 843
 844 /**
 845  * Callback to disable flow meter.
 846  *
 847  * @param[in] dev
 848  *   Pointer to Ethernet device.
 849  * @param[in] meter_id
 850  *   Meter id.
 851  * @param[out] error
 852  *   Pointer to rte meter error structure.
 853  *
 854  * @return
 855  *   0 on success, a negative errno value otherwise and rte_errno is set.
 856  */
 857 static int
 858 mlx5_flow_meter_disable(struct rte_eth_dev *dev,
 859                         uint32_t meter_id,
 860                         struct rte_mtr_error *error)
 861 {
 862         struct mlx5_priv *priv = dev->data->dev_private;
 863         struct mlx5_flow_meter *fm;
 864         int ret;
 865
 866         if (!priv->mtr_en)
 867                 return -rte_mtr_error_set(error, ENOTSUP,
 868                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 869                                           "Meter is not support");
 870         /* Meter object must exist. */
 871         fm = mlx5_flow_meter_find(priv, meter_id);
 872         if (fm == NULL)
 873                 return -rte_mtr_error_set(error, ENOENT,
 874                                           RTE_MTR_ERROR_TYPE_MTR_ID,
 875                                           NULL, "Meter not found.");
 876         if (fm->active_state == MLX5_FLOW_METER_DISABLE)
 877                 return 0;
 878         ret = mlx5_flow_meter_modify_state(priv, fm, MLX5_FLOW_METER_DISABLE,
 879                                            error);
 880         if (!ret)
 881                 fm->active_state = MLX5_FLOW_METER_DISABLE;
 882         return ret;
 883 }
 884
 885 /**
 886  * Callback to update meter profile.
 887  *
 888  * @param[in] dev
 889  *   Pointer to Ethernet device.
 890  * @param[in] meter_id
 891  *   Meter id.
 892  * @param[in] meter_profile_id
 893  *   To be updated meter profile id.
 894  * @param[out] error
 895  *   Pointer to rte meter error structure.
 896  *
 897  * @return
 898  *   0 on success, a negative errno value otherwise and rte_errno is set.
 899  */
 900 static int
 901 mlx5_flow_meter_profile_update(struct rte_eth_dev *dev,
 902                                uint32_t meter_id,
 903                                uint32_t meter_profile_id,
 904                                struct rte_mtr_error *error)
 905 {
 906         struct mlx5_priv *priv = dev->data->dev_private;
 907         struct mlx5_flow_meter_profile *fmp;
 908         struct mlx5_flow_meter_profile *old_fmp;
 909         struct mlx5_flow_meter *fm;
 910         uint64_t modify_bits = MLX5_FLOW_METER_OBJ_MODIFY_FIELD_CBS |
 911                                MLX5_FLOW_METER_OBJ_MODIFY_FIELD_CIR;
 912         int ret;
 913
 914         if (!priv->mtr_en)
 915                 return -rte_mtr_error_set(error, ENOTSUP,
 916                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 917                                           "Meter is not support");
 918         /* Meter profile must exist. */
 919         fmp = mlx5_flow_meter_profile_find(priv, meter_profile_id);
 920         if (fmp == NULL)
 921                 return -rte_mtr_error_set(error, ENOENT,
 922                                           RTE_MTR_ERROR_TYPE_METER_PROFILE_ID,
 923                                           NULL, "Meter profile not found.");
 924         /* Meter object must exist. */
 925         fm = mlx5_flow_meter_find(priv, meter_id);
 926         if (fm == NULL)
 927                 return -rte_mtr_error_set(error, ENOENT,
 928                                           RTE_MTR_ERROR_TYPE_MTR_ID,
 929                                           NULL, "Meter not found.");
 930         /* MTR object already set to meter profile id. */
 931         old_fmp = fm->profile;
 932         if (fmp == old_fmp)
 933                 return 0;
 934         /* Update the profile. */
 935         fm->profile = fmp;
 936         /* Update meter params in HW (if not disabled). */
 937         if (fm->active_state == MLX5_FLOW_METER_DISABLE)
 938                 return 0;
 939         ret = mlx5_flow_meter_action_modify(priv, fm, &fm->profile->srtcm_prm,
 940                                               modify_bits, fm->active_state);
 941         if (ret) {
 942                 fm->profile = old_fmp;
 943                 return -rte_mtr_error_set(error, -ret,
 944                                           RTE_MTR_ERROR_TYPE_MTR_PARAMS,
 945                                           NULL, "Failed to update meter"
 946                                           " parmeters in hardware.");
 947         }
 948         old_fmp->ref_cnt--;
 949         fmp->ref_cnt++;
 950         return 0;
 951 }
 952
 953 /**
 954  * Callback to update meter stats mask.
 955  *
 956  * @param[in] dev
 957  *   Pointer to Ethernet device.
 958  * @param[in] meter_id
 959  *   Meter id.
 960  * @param[in] stats_mask
 961  *   To be updated stats_mask.
 962  * @param[out] error
 963  *   Pointer to rte meter error structure.
 964  *
 965  * @return
 966  *   0 on success, a negative errno value otherwise and rte_errno is set.
 967  */
 968 static int
 969 mlx5_flow_meter_stats_update(struct rte_eth_dev *dev,
 970                              uint32_t meter_id,
 971                              uint64_t stats_mask,
 972                              struct rte_mtr_error *error)
 973 {
 974         struct mlx5_priv *priv = dev->data->dev_private;
 975         struct mlx5_flow_meter *fm;
 976
 977         if (!priv->mtr_en)
 978                 return -rte_mtr_error_set(error, ENOTSUP,
 979                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 980                                           "Meter is not support");
 981         /* Meter object must exist. */
 982         fm = mlx5_flow_meter_find(priv, meter_id);
 983         if (fm == NULL)
 984                 return -rte_mtr_error_set(error, ENOENT,
 985                                           RTE_MTR_ERROR_TYPE_MTR_ID,
 986                                           NULL, "Meter object id not valid.");
 987         fm->policer_stats.stats_mask = stats_mask;
 988         return 0;
 989 }
 990
 991 /**
 992  * Callback to read meter statistics.
 993  *
 994  * @param[in] dev
 995  *   Pointer to Ethernet device.
 996  * @param[in] meter_id
 997  *   Meter id.
 998  * @param[out] stats
 999  *   Pointer to store the statistics.
1000  * @param[out] stats_mask
1001  *   Pointer to store the stats_mask.
1002  * @param[in] clear
1003  *   Statistic to be cleared after read or not.
1004  * @param[out] error
1005  *   Pointer to rte meter error structure.
1006  *
1007  * @return
1008  *   0 on success, a negative errno value otherwise and rte_errno is set.
1009  */
1010 static int
1011 mlx5_flow_meter_stats_read(struct rte_eth_dev *dev,
1012                            uint32_t meter_id,
1013                            struct rte_mtr_stats *stats,
1014                            uint64_t *stats_mask,
1015                            int clear,
1016                            struct rte_mtr_error *error)
1017 {
1018         static uint64_t meter2mask[RTE_MTR_DROPPED + 1] = {
1019                 RTE_MTR_STATS_N_PKTS_GREEN | RTE_MTR_STATS_N_BYTES_GREEN,
1020                 RTE_MTR_STATS_N_PKTS_YELLOW | RTE_MTR_STATS_N_BYTES_YELLOW,
1021                 RTE_MTR_STATS_N_PKTS_RED | RTE_MTR_STATS_N_BYTES_RED,
1022                 RTE_MTR_STATS_N_PKTS_DROPPED | RTE_MTR_STATS_N_BYTES_DROPPED
1023         };
1024         struct mlx5_priv *priv = dev->data->dev_private;
1025         struct mlx5_flow_meter *fm;
1026         struct mlx5_flow_policer_stats *ps;
1027         uint64_t pkts_dropped = 0;
1028         uint64_t bytes_dropped = 0;
1029         uint64_t pkts;
1030         uint64_t bytes;
1031         int i;
1032         int ret = 0;
1033
1034         if (!priv->mtr_en)
1035                 return -rte_mtr_error_set(error, ENOTSUP,
1036                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
1037                                           "Meter is not support");
1038         /* Meter object must exist. */
1039         fm = mlx5_flow_meter_find(priv, meter_id);
1040         if (fm == NULL)
1041                 return -rte_mtr_error_set(error, ENOENT,
1042                                           RTE_MTR_ERROR_TYPE_MTR_ID,
1043                                           NULL, "Meter object id not valid.");
1044         ps = &fm->policer_stats;
1045         *stats_mask = ps->stats_mask;
1046         for (i = 0; i < RTE_MTR_DROPPED; i++) {
1047                 if (*stats_mask & meter2mask[i]) {
1048                         ret = mlx5_counter_query(dev, ps->cnt[i], clear, &pkts,
1049                                                  &bytes);
1050                         if (ret)
1051                                 goto error;
1052                         if (fm->params.action[i] == MTR_POLICER_ACTION_DROP) {
1053                                 pkts_dropped += pkts;
1054                                 bytes_dropped += bytes;
1055                         }
1056                         /* If need to read the packets, set it. */
1057                         if ((1 << i) & (*stats_mask & meter2mask[i]))
1058                                 stats->n_pkts[i] = pkts;
1059                         /* If need to read the bytes, set it. */
1060                         if ((1 << (RTE_MTR_DROPPED + 1 + i)) &
1061                            (*stats_mask & meter2mask[i]))
1062                                 stats->n_bytes[i] = bytes;
1063                 }
1064         }
1065         /* Dropped packets/bytes are treated differently. */
1066         if (*stats_mask & meter2mask[i]) {
1067                 ret = mlx5_counter_query(dev, ps->cnt[i], clear, &pkts,
1068                                          &bytes);
1069                 if (ret)
1070                         goto error;
1071                 pkts += pkts_dropped;
1072                 bytes += bytes_dropped;
1073                 /* If need to read the packets, set it. */
1074                 if ((*stats_mask & meter2mask[i]) &
1075                    RTE_MTR_STATS_N_PKTS_DROPPED)
1076                         stats->n_pkts_dropped = pkts;
1077                 /* If need to read the bytes, set it. */
1078                 if ((*stats_mask & meter2mask[i]) &
1079                    RTE_MTR_STATS_N_BYTES_DROPPED)
1080                         stats->n_bytes_dropped = bytes;
1081         }
1082         return 0;
1083 error:
1084         return -rte_mtr_error_set(error, ret, RTE_MTR_ERROR_TYPE_STATS, NULL,
1085                                  "Failed to read policer counters.");
1086 }
1087
1088 static const struct rte_mtr_ops mlx5_flow_mtr_ops = {
1089         .capabilities_get = mlx5_flow_mtr_cap_get,
1090         .meter_profile_add = mlx5_flow_meter_profile_add,
1091         .meter_profile_delete = mlx5_flow_meter_profile_delete,
1092         .create = mlx5_flow_meter_create,
1093         .destroy = mlx5_flow_meter_destroy,
1094         .meter_enable = mlx5_flow_meter_enable,
1095         .meter_disable = mlx5_flow_meter_disable,
1096         .meter_profile_update = mlx5_flow_meter_profile_update,
1097         .meter_dscp_table_update = NULL,
1098         .policer_actions_update = NULL,
1099         .stats_update = mlx5_flow_meter_stats_update,
1100         .stats_read = mlx5_flow_meter_stats_read,
1101 };
1102
1103 /**
1104  * Get meter operations.
1105  *
1106  * @param dev
1107  *   Pointer to Ethernet device structure.
1108  * @param arg
1109  *   Pointer to set the mtr operations.
1110  *
1111  * @return
1112  *   Always 0.
1113  */
1114 int
1115 mlx5_flow_meter_ops_get(struct rte_eth_dev *dev __rte_unused, void *arg)
1116 {
1117         *(const struct rte_mtr_ops **)arg = &mlx5_flow_mtr_ops;
1118         return 0;
1119 }
1120
1121 /**
1122  * Find meter by id.
1123  *
1124  * @param priv
1125  *   Pointer to mlx5_priv.
1126  * @param meter_id
1127  *   Meter id.
1128  *
1129  * @return
1130  *   Pointer to the profile found on success, NULL otherwise.
1131  */
1132 struct mlx5_flow_meter *
1133 mlx5_flow_meter_find(struct mlx5_priv *priv, uint32_t meter_id)
1134 {
1135         struct mlx5_flow_meters *fms = &priv->flow_meters;
1136         struct mlx5_flow_meter *fm;
1137
1138         TAILQ_FOREACH(fm, fms, next)
1139                 if (meter_id == fm->meter_id)
1140                         return fm;
1141         return NULL;
1142 }
1143
1144 /**
1145  * Attach meter to flow.
1146  * Unidirectional Meter creation can only be done
1147  * when flow direction is known, i.e. when calling meter_attach.
1148  *
1149  * @param [in] priv
1150  *  Pointer to mlx5 private data.
1151  * @param [in] meter_id
1152  *  Flow meter id.
1153  * @param [in] attr
1154  *  Pointer to flow attributes.
1155  * @param [out] error
1156  *  Pointer to error structure.
1157  *
1158  * @return the flow meter pointer, NULL otherwise.
1159  */
1160 struct mlx5_flow_meter *
1161 mlx5_flow_meter_attach(struct mlx5_priv *priv, uint32_t meter_id,
1162                        const struct rte_flow_attr *attr,
1163                        struct rte_flow_error *error)
1164 {
1165         struct mlx5_flow_meter *fm;
1166
1167         fm = mlx5_flow_meter_find(priv, meter_id);
1168         if (fm == NULL) {
1169                 rte_flow_error_set(error, ENOENT,
1170                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1171                                    "Meter object id not valid");
1172                 goto error;
1173         }
1174         if (!fm->shared && fm->ref_cnt) {
1175                 DRV_LOG(ERR, "Cannot share a non-shared meter.");
1176                 rte_flow_error_set(error, EINVAL,
1177                                   RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1178                                   "Meter can't be shared");
1179                 goto error;
1180         }
1181         if (!fm->ref_cnt++) {
1182                 RTE_ASSERT(!fm->mfts->meter_action);
1183                 fm->attr = *attr;
1184                 /* This also creates the meter object. */
1185                 fm->mfts->meter_action = mlx5_flow_meter_action_create(priv,
1186                                                                        fm);
1187                 if (!fm->mfts->meter_action)
1188                         goto error_detach;
1189         } else {
1190                 RTE_ASSERT(fm->mfts->meter_action);
1191                 if (attr->transfer != fm->attr.transfer ||
1192                     attr->ingress != fm->attr.ingress ||
1193                     attr->egress != fm->attr.egress) {
1194                         DRV_LOG(ERR, "meter I/O attributes do not "
1195                                 "match flow I/O attributes.");
1196                         goto error_detach;
1197                 }
1198         }
1199         return fm;
1200 error_detach:
1201         mlx5_flow_meter_detach(fm);
1202         rte_flow_error_set(error, EINVAL, RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1203                           fm->mfts->meter_action ? "Meter attr not match" :
1204                           "Meter action create failed");
1205 error:
1206         return NULL;
1207 }
1208
1209 /**
1210  * Detach meter from flow.
1211  *
1212  * @param [in] fm
1213  *  Pointer to flow meter.
1214  */
1215 void
1216 mlx5_flow_meter_detach(struct mlx5_flow_meter *fm)
1217 {
1218         const struct rte_flow_attr attr = { 0 };
1219
1220         RTE_ASSERT(fm->ref_cnt);
1221         if (--fm->ref_cnt)
1222                 return;
1223         if (fm->mfts->meter_action)
1224                 mlx5_glue->destroy_flow_action(fm->mfts->meter_action);
1225         fm->mfts->meter_action = NULL;
1226         fm->attr = attr;
1227 }
1228
1229 /**
1230  * Flush meter configuration.
1231  *
1232  * @param[in] dev
1233  *   Pointer to Ethernet device.
1234  * @param[out] error
1235  *   Pointer to rte meter error structure.
1236  *
1237  * @return
1238  *   0 on success, a negative errno value otherwise and rte_errno is set.
1239  */
1240 int
1241 mlx5_flow_meter_flush(struct rte_eth_dev *dev, struct rte_mtr_error *error)
1242 {
1243         struct mlx5_priv *priv = dev->data->dev_private;
1244         struct mlx5_flow_meters *fms = &priv->flow_meters;
1245         struct mlx5_mtr_profiles *fmps = &priv->flow_meter_profiles;
1246         struct mlx5_flow_meter_profile *fmp;
1247         struct mlx5_flow_meter *fm;
1248         const struct rte_flow_attr attr = {
1249                                 .ingress = 1,
1250                                 .egress = 1,
1251                                 .transfer = priv->config.dv_esw_en ? 1 : 0,
1252                         };
1253         void *tmp;
1254         uint32_t i;
1255
1256         TAILQ_FOREACH_SAFE(fm, fms, next, tmp) {
1257                 /* Meter object must not have any owner. */
1258                 RTE_ASSERT(!fm->ref_cnt);
1259                 /* Get meter profile. */
1260                 fmp = fm->profile;
1261                 if (fmp == NULL)
1262                         return -rte_mtr_error_set(error, EINVAL,
1263                                 RTE_MTR_ERROR_TYPE_METER_PROFILE_ID,
1264                                 NULL, "MTR object meter profile invalid.");
1265                 /* Update dependencies. */
1266                 fmp->ref_cnt--;
1267                 /* Remove from list. */
1268                 TAILQ_REMOVE(fms, fm, next);
1269                 /* Free policer counters. */
1270                 for (i = 0; i < RTE_DIM(fm->policer_stats.cnt); i++)
1271                         if (fm->policer_stats.cnt[i])
1272                                 mlx5_counter_free(dev,
1273                                                   fm->policer_stats.cnt[i]);
1274                 /* Free meter flow table. */
1275                 mlx5_flow_destroy_policer_rules(dev, fm, &attr);
1276                 mlx5_flow_destroy_mtr_tbls(dev, fm->mfts);
1277                 rte_free(fm);
1278         }
1279         TAILQ_FOREACH_SAFE(fmp, fmps, next, tmp) {
1280                 /* Check unused. */
1281                 RTE_ASSERT(!fmp->ref_cnt);
1282                 /* Remove from list. */
1283                 TAILQ_REMOVE(&priv->flow_meter_profiles, fmp, next);
1284                 rte_free(fmp);
1285         }
1286         return 0;
1287 }