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         uint32_t idx = 0;
 635
 636         if (!priv->mtr_en)
 637                 return -rte_mtr_error_set(error, ENOTSUP,
 638                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 639                                           "Meter is not support");
 640         /* Validate the parameters. */
 641         ret = mlx5_flow_meter_validate(priv, meter_id, params, error);
 642         if (ret)
 643                 return ret;
 644         /* Meter profile must exist. */
 645         fmp = mlx5_flow_meter_profile_find(priv, params->meter_profile_id);
 646         if (fmp == NULL)
 647                 return -rte_mtr_error_set(error, ENOENT,
 648                                           RTE_MTR_ERROR_TYPE_METER_PROFILE_ID,
 649                                           NULL, "Meter profile id not valid.");
 650         /* Allocate the flow meter memory. */
 651         fm = mlx5_ipool_zmalloc(priv->sh->ipool[MLX5_IPOOL_MTR], &idx);
 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         fm->idx = idx;
 657         /* Fill the flow meter parameters. */
 658         fm->meter_id = meter_id;
 659         fm->profile = fmp;
 660         fm->params = *params;
 661         /* Alloc policer counters. */
 662         for (i = 0; i < RTE_DIM(fm->policer_stats.cnt); i++) {
 663                 fm->policer_stats.cnt[i] = mlx5_counter_alloc(dev);
 664                 if (!fm->policer_stats.cnt[i])
 665                         goto error;
 666         }
 667         fm->mfts = mlx5_flow_create_mtr_tbls(dev, fm);
 668         if (!fm->mfts)
 669                 goto error;
 670         ret = mlx5_flow_create_policer_rules(dev, fm, &attr);
 671         if (ret)
 672                 goto error;
 673         /* Add to the flow meter list. */
 674         TAILQ_INSERT_TAIL(fms, fm, next);
 675         fm->active_state = 1; /* Config meter starts as active. */
 676         fm->shared = !!shared;
 677         fm->policer_stats.stats_mask = params->stats_mask;
 678         fm->profile->ref_cnt++;
 679         return 0;
 680 error:
 681         mlx5_flow_destroy_policer_rules(dev, fm, &attr);
 682         mlx5_flow_destroy_mtr_tbls(dev, fm->mfts);
 683         /* Free policer counters. */
 684         for (i = 0; i < RTE_DIM(fm->policer_stats.cnt); i++)
 685                 if (fm->policer_stats.cnt[i])
 686                         mlx5_counter_free(dev, fm->policer_stats.cnt[i]);
 687         mlx5_ipool_free(priv->sh->ipool[MLX5_IPOOL_MTR], idx);
 688         return -rte_mtr_error_set(error, -ret,
 689                                   RTE_MTR_ERROR_TYPE_UNSPECIFIED,
 690                                   NULL, "Failed to create devx meter.");
 691 }
 692
 693 /**
 694  * Destroy meter rules.
 695  *
 696  * @param[in] dev
 697  *   Pointer to Ethernet device.
 698  * @param[in] meter_id
 699  *   Meter id.
 700  * @param[out] error
 701  *   Pointer to rte meter error structure.
 702  *
 703  * @return
 704  *   0 on success, a negative errno value otherwise and rte_errno is set.
 705  */
 706 static int
 707 mlx5_flow_meter_destroy(struct rte_eth_dev *dev, uint32_t meter_id,
 708                         struct rte_mtr_error *error)
 709 {
 710         struct mlx5_priv *priv = dev->data->dev_private;
 711         struct mlx5_flow_meters *fms = &priv->flow_meters;
 712         struct mlx5_flow_meter_profile *fmp;
 713         struct mlx5_flow_meter *fm;
 714         const struct rte_flow_attr attr = {
 715                                 .ingress = 1,
 716                                 .egress = 1,
 717                                 .transfer = priv->config.dv_esw_en ? 1 : 0,
 718                         };
 719         unsigned int i;
 720
 721         if (!priv->mtr_en)
 722                 return -rte_mtr_error_set(error, ENOTSUP,
 723                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 724                                           "Meter is not support");
 725         /* Meter object must exist. */
 726         fm = mlx5_flow_meter_find(priv, meter_id);
 727         if (fm == NULL)
 728                 return -rte_mtr_error_set(error, ENOENT,
 729                                           RTE_MTR_ERROR_TYPE_MTR_ID,
 730                                           NULL, "Meter object id not valid.");
 731         /* Meter object must not have any owner. */
 732         if (fm->ref_cnt > 0)
 733                 return -rte_mtr_error_set(error, EBUSY,
 734                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED,
 735                                           NULL, "Meter object is being used.");
 736         /* Get the meter profile. */
 737         fmp = fm->profile;
 738         MLX5_ASSERT(fmp);
 739         /* Update dependencies. */
 740         fmp->ref_cnt--;
 741         /* Remove from the flow meter list. */
 742         TAILQ_REMOVE(fms, fm, next);
 743         /* Free policer counters. */
 744         for (i = 0; i < RTE_DIM(fm->policer_stats.cnt); i++)
 745                 if (fm->policer_stats.cnt[i])
 746                         mlx5_counter_free(dev, fm->policer_stats.cnt[i]);
 747         /* Free meter flow table */
 748         mlx5_flow_destroy_policer_rules(dev, fm, &attr);
 749         mlx5_flow_destroy_mtr_tbls(dev, fm->mfts);
 750         mlx5_ipool_free(priv->sh->ipool[MLX5_IPOOL_MTR], fm->idx);
 751         return 0;
 752 }
 753
 754 /**
 755  * Modify meter state.
 756  *
 757  * @param[in] priv
 758  *   Pointer to mlx5 private data structure.
 759  * @param[in] fm
 760  *   Pointer to flow meter.
 761  * @param[in] new_state
 762  *   New state to update.
 763  * @param[out] error
 764  *   Pointer to rte meter error structure.
 765  *
 766  * @return
 767  *   0 on success, a negative errno value otherwise and rte_errno is set.
 768  */
 769 static int
 770 mlx5_flow_meter_modify_state(struct mlx5_priv *priv,
 771                              struct mlx5_flow_meter *fm,
 772                              uint32_t new_state,
 773                              struct rte_mtr_error *error)
 774 {
 775         static const struct mlx5_flow_meter_srtcm_rfc2697_prm srtcm = {
 776                 .cbs_exponent = 20,
 777                 .cbs_mantissa = 191,
 778                 .cir_exponent = 0,
 779                 .cir_mantissa = 200,
 780                 .ebs_exponent = 0,
 781                 .ebs_mantissa = 0,
 782         };
 783         uint64_t modify_bits = MLX5_FLOW_METER_OBJ_MODIFY_FIELD_CBS |
 784                                MLX5_FLOW_METER_OBJ_MODIFY_FIELD_CIR;
 785         int ret;
 786
 787         if (new_state == MLX5_FLOW_METER_DISABLE)
 788                 ret = mlx5_flow_meter_action_modify(priv, fm, &srtcm,
 789                                                     modify_bits, 0);
 790         else
 791                 ret = mlx5_flow_meter_action_modify(priv, fm,
 792                                                    &fm->profile->srtcm_prm,
 793                                                     modify_bits, 0);
 794         if (ret)
 795                 return -rte_mtr_error_set(error, -ret,
 796                                           RTE_MTR_ERROR_TYPE_MTR_PARAMS,
 797                                           NULL,
 798                                           new_state ?
 799                                           "Failed to enable meter." :
 800                                           "Failed to disable meter.");
 801         return 0;
 802 }
 803
 804 /**
 805  * Callback to enable flow meter.
 806  *
 807  * @param[in] dev
 808  *   Pointer to Ethernet device.
 809  * @param[in] meter_id
 810  *   Meter id.
 811  * @param[out] error
 812  *   Pointer to rte meter error structure.
 813  *
 814  * @return
 815  *   0 on success, a negative errno value otherwise and rte_errno is set.
 816  */
 817 static int
 818 mlx5_flow_meter_enable(struct rte_eth_dev *dev,
 819                        uint32_t meter_id,
 820                        struct rte_mtr_error *error)
 821 {
 822         struct mlx5_priv *priv = dev->data->dev_private;
 823         struct mlx5_flow_meter *fm;
 824         int ret;
 825
 826         if (!priv->mtr_en)
 827                 return -rte_mtr_error_set(error, ENOTSUP,
 828                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 829                                           "Meter is not support");
 830         /* Meter object must exist. */
 831         fm = mlx5_flow_meter_find(priv, meter_id);
 832         if (fm == NULL)
 833                 return -rte_mtr_error_set(error, ENOENT,
 834                                           RTE_MTR_ERROR_TYPE_MTR_ID,
 835                                           NULL, "Meter not found.");
 836         if (fm->active_state == MLX5_FLOW_METER_ENABLE)
 837                 return 0;
 838         ret = mlx5_flow_meter_modify_state(priv, fm, MLX5_FLOW_METER_ENABLE,
 839                                            error);
 840         if (!ret)
 841                 fm->active_state = MLX5_FLOW_METER_ENABLE;
 842         return ret;
 843 }
 844
 845 /**
 846  * Callback to disable flow meter.
 847  *
 848  * @param[in] dev
 849  *   Pointer to Ethernet device.
 850  * @param[in] meter_id
 851  *   Meter id.
 852  * @param[out] error
 853  *   Pointer to rte meter error structure.
 854  *
 855  * @return
 856  *   0 on success, a negative errno value otherwise and rte_errno is set.
 857  */
 858 static int
 859 mlx5_flow_meter_disable(struct rte_eth_dev *dev,
 860                         uint32_t meter_id,
 861                         struct rte_mtr_error *error)
 862 {
 863         struct mlx5_priv *priv = dev->data->dev_private;
 864         struct mlx5_flow_meter *fm;
 865         int ret;
 866
 867         if (!priv->mtr_en)
 868                 return -rte_mtr_error_set(error, ENOTSUP,
 869                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 870                                           "Meter is not support");
 871         /* Meter object must exist. */
 872         fm = mlx5_flow_meter_find(priv, meter_id);
 873         if (fm == NULL)
 874                 return -rte_mtr_error_set(error, ENOENT,
 875                                           RTE_MTR_ERROR_TYPE_MTR_ID,
 876                                           NULL, "Meter not found.");
 877         if (fm->active_state == MLX5_FLOW_METER_DISABLE)
 878                 return 0;
 879         ret = mlx5_flow_meter_modify_state(priv, fm, MLX5_FLOW_METER_DISABLE,
 880                                            error);
 881         if (!ret)
 882                 fm->active_state = MLX5_FLOW_METER_DISABLE;
 883         return ret;
 884 }
 885
 886 /**
 887  * Callback to update meter profile.
 888  *
 889  * @param[in] dev
 890  *   Pointer to Ethernet device.
 891  * @param[in] meter_id
 892  *   Meter id.
 893  * @param[in] meter_profile_id
 894  *   To be updated meter profile id.
 895  * @param[out] error
 896  *   Pointer to rte meter error structure.
 897  *
 898  * @return
 899  *   0 on success, a negative errno value otherwise and rte_errno is set.
 900  */
 901 static int
 902 mlx5_flow_meter_profile_update(struct rte_eth_dev *dev,
 903                                uint32_t meter_id,
 904                                uint32_t meter_profile_id,
 905                                struct rte_mtr_error *error)
 906 {
 907         struct mlx5_priv *priv = dev->data->dev_private;
 908         struct mlx5_flow_meter_profile *fmp;
 909         struct mlx5_flow_meter_profile *old_fmp;
 910         struct mlx5_flow_meter *fm;
 911         uint64_t modify_bits = MLX5_FLOW_METER_OBJ_MODIFY_FIELD_CBS |
 912                                MLX5_FLOW_METER_OBJ_MODIFY_FIELD_CIR;
 913         int ret;
 914
 915         if (!priv->mtr_en)
 916                 return -rte_mtr_error_set(error, ENOTSUP,
 917                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 918                                           "Meter is not support");
 919         /* Meter profile must exist. */
 920         fmp = mlx5_flow_meter_profile_find(priv, meter_profile_id);
 921         if (fmp == NULL)
 922                 return -rte_mtr_error_set(error, ENOENT,
 923                                           RTE_MTR_ERROR_TYPE_METER_PROFILE_ID,
 924                                           NULL, "Meter profile not found.");
 925         /* Meter object must exist. */
 926         fm = mlx5_flow_meter_find(priv, meter_id);
 927         if (fm == NULL)
 928                 return -rte_mtr_error_set(error, ENOENT,
 929                                           RTE_MTR_ERROR_TYPE_MTR_ID,
 930                                           NULL, "Meter not found.");
 931         /* MTR object already set to meter profile id. */
 932         old_fmp = fm->profile;
 933         if (fmp == old_fmp)
 934                 return 0;
 935         /* Update the profile. */
 936         fm->profile = fmp;
 937         /* Update meter params in HW (if not disabled). */
 938         if (fm->active_state == MLX5_FLOW_METER_DISABLE)
 939                 return 0;
 940         ret = mlx5_flow_meter_action_modify(priv, fm, &fm->profile->srtcm_prm,
 941                                               modify_bits, fm->active_state);
 942         if (ret) {
 943                 fm->profile = old_fmp;
 944                 return -rte_mtr_error_set(error, -ret,
 945                                           RTE_MTR_ERROR_TYPE_MTR_PARAMS,
 946                                           NULL, "Failed to update meter"
 947                                           " parmeters in hardware.");
 948         }
 949         old_fmp->ref_cnt--;
 950         fmp->ref_cnt++;
 951         return 0;
 952 }
 953
 954 /**
 955  * Callback to update meter stats mask.
 956  *
 957  * @param[in] dev
 958  *   Pointer to Ethernet device.
 959  * @param[in] meter_id
 960  *   Meter id.
 961  * @param[in] stats_mask
 962  *   To be updated stats_mask.
 963  * @param[out] error
 964  *   Pointer to rte meter error structure.
 965  *
 966  * @return
 967  *   0 on success, a negative errno value otherwise and rte_errno is set.
 968  */
 969 static int
 970 mlx5_flow_meter_stats_update(struct rte_eth_dev *dev,
 971                              uint32_t meter_id,
 972                              uint64_t stats_mask,
 973                              struct rte_mtr_error *error)
 974 {
 975         struct mlx5_priv *priv = dev->data->dev_private;
 976         struct mlx5_flow_meter *fm;
 977
 978         if (!priv->mtr_en)
 979                 return -rte_mtr_error_set(error, ENOTSUP,
 980                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 981                                           "Meter is not support");
 982         /* Meter object must exist. */
 983         fm = mlx5_flow_meter_find(priv, meter_id);
 984         if (fm == NULL)
 985                 return -rte_mtr_error_set(error, ENOENT,
 986                                           RTE_MTR_ERROR_TYPE_MTR_ID,
 987                                           NULL, "Meter object id not valid.");
 988         fm->policer_stats.stats_mask = stats_mask;
 989         return 0;
 990 }
 991
 992 /**
 993  * Callback to read meter statistics.
 994  *
 995  * @param[in] dev
 996  *   Pointer to Ethernet device.
 997  * @param[in] meter_id
 998  *   Meter id.
 999  * @param[out] stats
1000  *   Pointer to store the statistics.
1001  * @param[out] stats_mask
1002  *   Pointer to store the stats_mask.
1003  * @param[in] clear
1004  *   Statistic to be cleared after read or not.
1005  * @param[out] error
1006  *   Pointer to rte meter error structure.
1007  *
1008  * @return
1009  *   0 on success, a negative errno value otherwise and rte_errno is set.
1010  */
1011 static int
1012 mlx5_flow_meter_stats_read(struct rte_eth_dev *dev,
1013                            uint32_t meter_id,
1014                            struct rte_mtr_stats *stats,
1015                            uint64_t *stats_mask,
1016                            int clear,
1017                            struct rte_mtr_error *error)
1018 {
1019         static uint64_t meter2mask[RTE_MTR_DROPPED + 1] = {
1020                 RTE_MTR_STATS_N_PKTS_GREEN | RTE_MTR_STATS_N_BYTES_GREEN,
1021                 RTE_MTR_STATS_N_PKTS_YELLOW | RTE_MTR_STATS_N_BYTES_YELLOW,
1022                 RTE_MTR_STATS_N_PKTS_RED | RTE_MTR_STATS_N_BYTES_RED,
1023                 RTE_MTR_STATS_N_PKTS_DROPPED | RTE_MTR_STATS_N_BYTES_DROPPED
1024         };
1025         struct mlx5_priv *priv = dev->data->dev_private;
1026         struct mlx5_flow_meter *fm;
1027         struct mlx5_flow_policer_stats *ps;
1028         uint64_t pkts_dropped = 0;
1029         uint64_t bytes_dropped = 0;
1030         uint64_t pkts;
1031         uint64_t bytes;
1032         int i;
1033         int ret = 0;
1034
1035         if (!priv->mtr_en)
1036                 return -rte_mtr_error_set(error, ENOTSUP,
1037                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
1038                                           "Meter is not support");
1039         /* Meter object must exist. */
1040         fm = mlx5_flow_meter_find(priv, meter_id);
1041         if (fm == NULL)
1042                 return -rte_mtr_error_set(error, ENOENT,
1043                                           RTE_MTR_ERROR_TYPE_MTR_ID,
1044                                           NULL, "Meter object id not valid.");
1045         ps = &fm->policer_stats;
1046         *stats_mask = ps->stats_mask;
1047         for (i = 0; i < RTE_MTR_DROPPED; i++) {
1048                 if (*stats_mask & meter2mask[i]) {
1049                         ret = mlx5_counter_query(dev, ps->cnt[i], clear, &pkts,
1050                                                  &bytes);
1051                         if (ret)
1052                                 goto error;
1053                         if (fm->params.action[i] == MTR_POLICER_ACTION_DROP) {
1054                                 pkts_dropped += pkts;
1055                                 bytes_dropped += bytes;
1056                         }
1057                         /* If need to read the packets, set it. */
1058                         if ((1 << i) & (*stats_mask & meter2mask[i]))
1059                                 stats->n_pkts[i] = pkts;
1060                         /* If need to read the bytes, set it. */
1061                         if ((1 << (RTE_MTR_DROPPED + 1 + i)) &
1062                            (*stats_mask & meter2mask[i]))
1063                                 stats->n_bytes[i] = bytes;
1064                 }
1065         }
1066         /* Dropped packets/bytes are treated differently. */
1067         if (*stats_mask & meter2mask[i]) {
1068                 ret = mlx5_counter_query(dev, ps->cnt[i], clear, &pkts,
1069                                          &bytes);
1070                 if (ret)
1071                         goto error;
1072                 pkts += pkts_dropped;
1073                 bytes += bytes_dropped;
1074                 /* If need to read the packets, set it. */
1075                 if ((*stats_mask & meter2mask[i]) &
1076                    RTE_MTR_STATS_N_PKTS_DROPPED)
1077                         stats->n_pkts_dropped = pkts;
1078                 /* If need to read the bytes, set it. */
1079                 if ((*stats_mask & meter2mask[i]) &
1080                    RTE_MTR_STATS_N_BYTES_DROPPED)
1081                         stats->n_bytes_dropped = bytes;
1082         }
1083         return 0;
1084 error:
1085         return -rte_mtr_error_set(error, ret, RTE_MTR_ERROR_TYPE_STATS, NULL,
1086                                  "Failed to read policer counters.");
1087 }
1088
1089 static const struct rte_mtr_ops mlx5_flow_mtr_ops = {
1090         .capabilities_get = mlx5_flow_mtr_cap_get,
1091         .meter_profile_add = mlx5_flow_meter_profile_add,
1092         .meter_profile_delete = mlx5_flow_meter_profile_delete,
1093         .create = mlx5_flow_meter_create,
1094         .destroy = mlx5_flow_meter_destroy,
1095         .meter_enable = mlx5_flow_meter_enable,
1096         .meter_disable = mlx5_flow_meter_disable,
1097         .meter_profile_update = mlx5_flow_meter_profile_update,
1098         .meter_dscp_table_update = NULL,
1099         .policer_actions_update = NULL,
1100         .stats_update = mlx5_flow_meter_stats_update,
1101         .stats_read = mlx5_flow_meter_stats_read,
1102 };
1103
1104 /**
1105  * Get meter operations.
1106  *
1107  * @param dev
1108  *   Pointer to Ethernet device structure.
1109  * @param arg
1110  *   Pointer to set the mtr operations.
1111  *
1112  * @return
1113  *   Always 0.
1114  */
1115 int
1116 mlx5_flow_meter_ops_get(struct rte_eth_dev *dev __rte_unused, void *arg)
1117 {
1118         *(const struct rte_mtr_ops **)arg = &mlx5_flow_mtr_ops;
1119         return 0;
1120 }
1121
1122 /**
1123  * Find meter by id.
1124  *
1125  * @param priv
1126  *   Pointer to mlx5_priv.
1127  * @param meter_id
1128  *   Meter id.
1129  *
1130  * @return
1131  *   Pointer to the profile found on success, NULL otherwise.
1132  */
1133 struct mlx5_flow_meter *
1134 mlx5_flow_meter_find(struct mlx5_priv *priv, uint32_t meter_id)
1135 {
1136         struct mlx5_flow_meters *fms = &priv->flow_meters;
1137         struct mlx5_flow_meter *fm;
1138
1139         TAILQ_FOREACH(fm, fms, next)
1140                 if (meter_id == fm->meter_id)
1141                         return fm;
1142         return NULL;
1143 }
1144
1145 /**
1146  * Attach meter to flow.
1147  * Unidirectional Meter creation can only be done
1148  * when flow direction is known, i.e. when calling meter_attach.
1149  *
1150  * @param [in] priv
1151  *  Pointer to mlx5 private data.
1152  * @param [in] meter_id
1153  *  Flow meter id.
1154  * @param [in] attr
1155  *  Pointer to flow attributes.
1156  * @param [out] error
1157  *  Pointer to error structure.
1158  *
1159  * @return the flow meter pointer, NULL otherwise.
1160  */
1161 struct mlx5_flow_meter *
1162 mlx5_flow_meter_attach(struct mlx5_priv *priv, uint32_t meter_id,
1163                        const struct rte_flow_attr *attr,
1164                        struct rte_flow_error *error)
1165 {
1166         struct mlx5_flow_meter *fm;
1167
1168         fm = mlx5_flow_meter_find(priv, meter_id);
1169         if (fm == NULL) {
1170                 rte_flow_error_set(error, ENOENT,
1171                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1172                                    "Meter object id not valid");
1173                 goto error;
1174         }
1175         if (!fm->shared && fm->ref_cnt) {
1176                 DRV_LOG(ERR, "Cannot share a non-shared meter.");
1177                 rte_flow_error_set(error, EINVAL,
1178                                   RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1179                                   "Meter can't be shared");
1180                 goto error;
1181         }
1182         if (!fm->ref_cnt++) {
1183                 MLX5_ASSERT(!fm->mfts->meter_action);
1184                 fm->attr = *attr;
1185                 /* This also creates the meter object. */
1186                 fm->mfts->meter_action = mlx5_flow_meter_action_create(priv,
1187                                                                        fm);
1188                 if (!fm->mfts->meter_action)
1189                         goto error_detach;
1190         } else {
1191                 MLX5_ASSERT(fm->mfts->meter_action);
1192                 if (attr->transfer != fm->attr.transfer ||
1193                     attr->ingress != fm->attr.ingress ||
1194                     attr->egress != fm->attr.egress) {
1195                         DRV_LOG(ERR, "meter I/O attributes do not "
1196                                 "match flow I/O attributes.");
1197                         goto error_detach;
1198                 }
1199         }
1200         return fm;
1201 error_detach:
1202         mlx5_flow_meter_detach(fm);
1203         rte_flow_error_set(error, EINVAL, RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1204                           fm->mfts->meter_action ? "Meter attr not match" :
1205                           "Meter action create failed");
1206 error:
1207         return NULL;
1208 }
1209
1210 /**
1211  * Detach meter from flow.
1212  *
1213  * @param [in] fm
1214  *  Pointer to flow meter.
1215  */
1216 void
1217 mlx5_flow_meter_detach(struct mlx5_flow_meter *fm)
1218 {
1219         const struct rte_flow_attr attr = { 0 };
1220
1221         MLX5_ASSERT(fm->ref_cnt);
1222         if (--fm->ref_cnt)
1223                 return;
1224         if (fm->mfts->meter_action)
1225                 mlx5_glue->destroy_flow_action(fm->mfts->meter_action);
1226         fm->mfts->meter_action = NULL;
1227         fm->attr = attr;
1228 }
1229
1230 /**
1231  * Flush meter configuration.
1232  *
1233  * @param[in] dev
1234  *   Pointer to Ethernet device.
1235  * @param[out] error
1236  *   Pointer to rte meter error structure.
1237  *
1238  * @return
1239  *   0 on success, a negative errno value otherwise and rte_errno is set.
1240  */
1241 int
1242 mlx5_flow_meter_flush(struct rte_eth_dev *dev, struct rte_mtr_error *error)
1243 {
1244         struct mlx5_priv *priv = dev->data->dev_private;
1245         struct mlx5_flow_meters *fms = &priv->flow_meters;
1246         struct mlx5_mtr_profiles *fmps = &priv->flow_meter_profiles;
1247         struct mlx5_flow_meter_profile *fmp;
1248         struct mlx5_flow_meter *fm;
1249         const struct rte_flow_attr attr = {
1250                                 .ingress = 1,
1251                                 .egress = 1,
1252                                 .transfer = priv->config.dv_esw_en ? 1 : 0,
1253                         };
1254         void *tmp;
1255         uint32_t i;
1256
1257         TAILQ_FOREACH_SAFE(fm, fms, next, tmp) {
1258                 /* Meter object must not have any owner. */
1259                 MLX5_ASSERT(!fm->ref_cnt);
1260                 /* Get meter profile. */
1261                 fmp = fm->profile;
1262                 if (fmp == NULL)
1263                         return -rte_mtr_error_set(error, EINVAL,
1264                                 RTE_MTR_ERROR_TYPE_METER_PROFILE_ID,
1265                                 NULL, "MTR object meter profile invalid.");
1266                 /* Update dependencies. */
1267                 fmp->ref_cnt--;
1268                 /* Remove from list. */
1269                 TAILQ_REMOVE(fms, fm, next);
1270                 /* Free policer counters. */
1271                 for (i = 0; i < RTE_DIM(fm->policer_stats.cnt); i++)
1272                         if (fm->policer_stats.cnt[i])
1273                                 mlx5_counter_free(dev,
1274                                                   fm->policer_stats.cnt[i]);
1275                 /* Free meter flow table. */
1276                 mlx5_flow_destroy_policer_rules(dev, fm, &attr);
1277                 mlx5_flow_destroy_mtr_tbls(dev, fm->mfts);
1278                 mlx5_ipool_free(priv->sh->ipool[MLX5_IPOOL_MTR], fm->idx);
1279         }
1280         TAILQ_FOREACH_SAFE(fmp, fmps, next, tmp) {
1281                 /* Check unused. */
1282                 MLX5_ASSERT(!fmp->ref_cnt);
1283                 /* Remove from list. */
1284                 TAILQ_REMOVE(&priv->flow_meter_profiles, fmp, next);
1285                 rte_free(fmp);
1286         }
1287         return 0;
1288 }