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 #include <mlx5_malloc.h>
  14
  15 #include "mlx5.h"
  16 #include "mlx5_flow.h"
  17
  18 /**
  19  * Create the meter action.
  20  *
  21  * @param priv
  22  *   Pointer to mlx5_priv.
  23  * @param[in] fm
  24  *   Pointer to flow meter to be converted.
  25  *
  26  * @return
  27  *   Pointer to the meter action on success, NULL otherwise.
  28  */
  29 static void *
  30 mlx5_flow_meter_action_create(struct mlx5_priv *priv,
  31                               struct mlx5_flow_meter *fm)
  32 {
  33 #ifdef HAVE_MLX5_DR_CREATE_ACTION_FLOW_METER
  34         struct mlx5dv_dr_flow_meter_attr mtr_init;
  35         void *attr = fm->mfts->fmp;
  36         struct mlx5_flow_meter_srtcm_rfc2697_prm *srtcm =
  37                                                      &fm->profile->srtcm_prm;
  38
  39         fm->mfts->fmp_size = MLX5_ST_SZ_BYTES(flow_meter_parameters);
  40         memset(attr, 0, fm->mfts->fmp_size);
  41         MLX5_SET(flow_meter_parameters, attr, valid, 1);
  42         MLX5_SET(flow_meter_parameters, attr, bucket_overflow, 1);
  43         MLX5_SET(flow_meter_parameters, attr,
  44                  start_color, MLX5_FLOW_COLOR_GREEN);
  45         MLX5_SET(flow_meter_parameters, attr, both_buckets_on_green, 0);
  46         MLX5_SET(flow_meter_parameters,
  47                  attr, cbs_exponent, srtcm->cbs_exponent);
  48         MLX5_SET(flow_meter_parameters,
  49                  attr, cbs_mantissa, srtcm->cbs_mantissa);
  50         MLX5_SET(flow_meter_parameters,
  51                  attr, cir_exponent, srtcm->cir_exponent);
  52         MLX5_SET(flow_meter_parameters,
  53                  attr, cir_mantissa, srtcm->cir_mantissa);
  54         MLX5_SET(flow_meter_parameters,
  55                  attr, ebs_exponent, srtcm->ebs_exponent);
  56         MLX5_SET(flow_meter_parameters,
  57                  attr, ebs_mantissa, srtcm->ebs_mantissa);
  58         mtr_init.next_table =
  59                 fm->transfer ? fm->mfts->transfer.tbl->obj :
  60                     fm->egress ? fm->mfts->egress.tbl->obj :
  61                                        fm->mfts->ingress.tbl->obj;
  62         mtr_init.reg_c_index = priv->mtr_color_reg - REG_C_0;
  63         mtr_init.flow_meter_parameter = fm->mfts->fmp;
  64         mtr_init.flow_meter_parameter_sz = fm->mfts->fmp_size;
  65         mtr_init.active = fm->active_state;
  66         return mlx5_glue->dv_create_flow_action_meter(&mtr_init);
  67 #else
  68         (void)priv;
  69         (void)fm;
  70         return NULL;
  71 #endif
  72 }
  73
  74 /**
  75  * Find meter profile by id.
  76  *
  77  * @param priv
  78  *   Pointer to mlx5_priv.
  79  * @param meter_profile_id
  80  *   Meter profile id.
  81  *
  82  * @return
  83  *   Pointer to the profile found on success, NULL otherwise.
  84  */
  85 static struct mlx5_flow_meter_profile *
  86 mlx5_flow_meter_profile_find(struct mlx5_priv *priv, uint32_t meter_profile_id)
  87 {
  88         struct mlx5_mtr_profiles *fmps = &priv->flow_meter_profiles;
  89         struct mlx5_flow_meter_profile *fmp;
  90
  91         TAILQ_FOREACH(fmp, fmps, next)
  92                 if (meter_profile_id == fmp->meter_profile_id)
  93                         return fmp;
  94         return NULL;
  95 }
  96
  97 /**
  98  * Validate the MTR profile.
  99  *
 100  * @param[in] dev
 101  *   Pointer to Ethernet device.
 102  * @param[in] meter_profile_id
 103  *   Meter profile id.
 104  * @param[in] profile
 105  *   Pointer to meter profile detail.
 106  * @param[out] error
 107  *   Pointer to the error structure.
 108  *
 109  * @return
 110  *   0 on success, a negative errno value otherwise and rte_errno is set.
 111  */
 112 static int
 113 mlx5_flow_meter_profile_validate(struct rte_eth_dev *dev,
 114                                  uint32_t meter_profile_id,
 115                                  struct rte_mtr_meter_profile *profile,
 116                                  struct rte_mtr_error *error)
 117 {
 118         struct mlx5_priv *priv = dev->data->dev_private;
 119         struct mlx5_flow_meter_profile *fmp;
 120
 121         /* Profile must not be NULL. */
 122         if (profile == NULL)
 123                 return -rte_mtr_error_set(error, EINVAL,
 124                                           RTE_MTR_ERROR_TYPE_METER_PROFILE,
 125                                           NULL, "Meter profile is null.");
 126         /* Meter profile ID must be valid. */
 127         if (meter_profile_id == UINT32_MAX)
 128                 return -rte_mtr_error_set(error, EINVAL,
 129                                           RTE_MTR_ERROR_TYPE_METER_PROFILE_ID,
 130                                           NULL, "Meter profile id not valid.");
 131         /* Meter profile must not exist. */
 132         fmp = mlx5_flow_meter_profile_find(priv, meter_profile_id);
 133         if (fmp)
 134                 return -rte_mtr_error_set(error, EEXIST,
 135                                           RTE_MTR_ERROR_TYPE_METER_PROFILE_ID,
 136                                           NULL,
 137                                           "Meter profile already exists.");
 138         if (profile->alg == RTE_MTR_SRTCM_RFC2697) {
 139                 if (priv->config.hca_attr.qos.srtcm_sup) {
 140                         /* Verify support for flow meter parameters. */
 141                         if (profile->srtcm_rfc2697.cir > 0 &&
 142                             profile->srtcm_rfc2697.cir <= MLX5_SRTCM_CIR_MAX &&
 143                             profile->srtcm_rfc2697.cbs > 0 &&
 144                             profile->srtcm_rfc2697.cbs <= MLX5_SRTCM_CBS_MAX &&
 145                             profile->srtcm_rfc2697.ebs <= MLX5_SRTCM_EBS_MAX)
 146                                 return 0;
 147                         else
 148                                 return -rte_mtr_error_set
 149                                              (error, ENOTSUP,
 150                                               RTE_MTR_ERROR_TYPE_MTR_PARAMS,
 151                                               NULL,
 152                                               profile->srtcm_rfc2697.ebs ?
 153                                               "Metering value ebs must be 0." :
 154                                               "Invalid metering parameters.");
 155                 }
 156         }
 157         return -rte_mtr_error_set(error, ENOTSUP,
 158                                   RTE_MTR_ERROR_TYPE_METER_PROFILE,
 159                                   NULL, "Metering algorithm not supported.");
 160 }
 161
 162 /**
 163  * Calculate mantissa and exponent for cir.
 164  *
 165  * @param[in] cir
 166  *   Value to be calculated.
 167  * @param[out] man
 168  *   Pointer to the mantissa.
 169  * @param[out] exp
 170  *   Pointer to the exp.
 171  */
 172 static void
 173 mlx5_flow_meter_cir_man_exp_calc(int64_t cir, uint8_t *man, uint8_t *exp)
 174 {
 175         int64_t _cir;
 176         int64_t delta = INT64_MAX;
 177         uint8_t _man = 0;
 178         uint8_t _exp = 0;
 179         uint64_t m, e;
 180
 181         for (m = 0; m <= 0xFF; m++) { /* man width 8 bit */
 182                 for (e = 0; e <= 0x1F; e++) { /* exp width 5bit */
 183                         _cir = (1000000000ULL * m) >> e;
 184                         if (llabs(cir - _cir) <= delta) {
 185                                 delta = llabs(cir - _cir);
 186                                 _man = m;
 187                                 _exp = e;
 188                         }
 189                 }
 190         }
 191         *man = _man;
 192         *exp = _exp;
 193 }
 194
 195 /**
 196  * Calculate mantissa and exponent for xbs.
 197  *
 198  * @param[in] xbs
 199  *   Value to be calculated.
 200  * @param[out] man
 201  *   Pointer to the mantissa.
 202  * @param[out] exp
 203  *   Pointer to the exp.
 204  */
 205 static void
 206 mlx5_flow_meter_xbs_man_exp_calc(uint64_t xbs, uint8_t *man, uint8_t *exp)
 207 {
 208         int _exp;
 209         double _man;
 210
 211         /* Special case xbs == 0 ? both exp and matissa are 0. */
 212         if (xbs == 0) {
 213                 *man = 0;
 214                 *exp = 0;
 215                 return;
 216         }
 217         /* xbs = xbs_mantissa * 2^xbs_exponent */
 218         _man = frexp(xbs, &_exp);
 219         _man = _man * pow(2, MLX5_MAN_WIDTH);
 220         _exp = _exp - MLX5_MAN_WIDTH;
 221         *man = (uint8_t)ceil(_man);
 222         *exp = _exp;
 223 }
 224
 225 /**
 226  * Fill the prm meter parameter.
 227  *
 228  * @param[in,out] fmp
 229  *   Pointer to meter profie to be converted.
 230  * @param[out] error
 231  *   Pointer to the error structure.
 232  *
 233  * @return
 234  *   0 on success, a negative errno value otherwise and rte_errno is set.
 235  */
 236 static int
 237 mlx5_flow_meter_param_fill(struct mlx5_flow_meter_profile *fmp,
 238                           struct rte_mtr_error *error)
 239 {
 240         struct mlx5_flow_meter_srtcm_rfc2697_prm *srtcm = &fmp->srtcm_prm;
 241         uint8_t man, exp;
 242
 243         if (fmp->profile.alg != RTE_MTR_SRTCM_RFC2697)
 244                 return -rte_mtr_error_set(error, ENOTSUP,
 245                                 RTE_MTR_ERROR_TYPE_METER_PROFILE,
 246                                 NULL, "Metering algorithm not supported.");
 247          /* cbs = cbs_mantissa * 2^cbs_exponent */
 248         mlx5_flow_meter_xbs_man_exp_calc(fmp->profile.srtcm_rfc2697.cbs,
 249                                     &man, &exp);
 250         srtcm->cbs_mantissa = man;
 251         srtcm->cbs_exponent = exp;
 252         /* Check if cbs mantissa is too large. */
 253         if (srtcm->cbs_exponent != exp)
 254                 return -rte_mtr_error_set(error, EINVAL,
 255                                           RTE_MTR_ERROR_TYPE_MTR_PARAMS, NULL,
 256                                           "Metering profile parameter cbs is"
 257                                           " invalid.");
 258         /* ebs = ebs_mantissa * 2^ebs_exponent */
 259         mlx5_flow_meter_xbs_man_exp_calc(fmp->profile.srtcm_rfc2697.ebs,
 260                                     &man, &exp);
 261         srtcm->ebs_mantissa = man;
 262         srtcm->ebs_exponent = exp;
 263         /* Check if ebs mantissa is too large. */
 264         if (srtcm->ebs_exponent != exp)
 265                 return -rte_mtr_error_set(error, EINVAL,
 266                                           RTE_MTR_ERROR_TYPE_MTR_PARAMS, NULL,
 267                                           "Metering profile parameter ebs is"
 268                                           " invalid.");
 269         /* cir = 8G * cir_mantissa * 1/(2^cir_exponent)) Bytes/Sec */
 270         mlx5_flow_meter_cir_man_exp_calc(fmp->profile.srtcm_rfc2697.cir,
 271                                     &man, &exp);
 272         srtcm->cir_mantissa = man;
 273         srtcm->cir_exponent = exp;
 274         /* Check if cir mantissa is too large. */
 275         if (srtcm->cir_exponent != exp)
 276                 return -rte_mtr_error_set(error, EINVAL,
 277                                           RTE_MTR_ERROR_TYPE_MTR_PARAMS, NULL,
 278                                           "Metering profile parameter cir is"
 279                                           " invalid.");
 280         return 0;
 281 }
 282
 283 /**
 284  * Callback to get MTR capabilities.
 285  *
 286  * @param[in] dev
 287  *   Pointer to Ethernet device.
 288  * @param[out] cap
 289  *   Pointer to save MTR capabilities.
 290  * @param[out] error
 291  *   Pointer to the error structure.
 292  *
 293  * @return
 294  *   0 on success, a negative errno value otherwise and rte_errno is set.
 295  */
 296 static int
 297 mlx5_flow_mtr_cap_get(struct rte_eth_dev *dev,
 298                  struct rte_mtr_capabilities *cap,
 299                  struct rte_mtr_error *error __rte_unused)
 300 {
 301         struct mlx5_priv *priv = dev->data->dev_private;
 302         struct mlx5_hca_qos_attr *qattr = &priv->config.hca_attr.qos;
 303
 304         if (!priv->mtr_en)
 305                 return -rte_mtr_error_set(error, ENOTSUP,
 306                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 307                                           "Meter is not supported");
 308         memset(cap, 0, sizeof(*cap));
 309         cap->n_max = 1 << qattr->log_max_flow_meter;
 310         cap->n_shared_max = cap->n_max;
 311         cap->identical = 1;
 312         cap->shared_identical = 1;
 313         cap->shared_n_flows_per_mtr_max = 4 << 20;
 314         /* 2M flows can share the same meter. */
 315         cap->chaining_n_mtrs_per_flow_max = 1; /* Chaining is not supported. */
 316         cap->meter_srtcm_rfc2697_n_max = qattr->srtcm_sup ? cap->n_max : 0;
 317         cap->meter_rate_max = 1ULL << 40; /* 1 Tera tokens per sec. */
 318         cap->policer_action_drop_supported = 1;
 319         cap->stats_mask = RTE_MTR_STATS_N_BYTES_DROPPED |
 320                           RTE_MTR_STATS_N_PKTS_DROPPED;
 321         return 0;
 322 }
 323
 324 /**
 325  * Callback to add MTR profile.
 326  *
 327  * @param[in] dev
 328  *   Pointer to Ethernet device.
 329  * @param[in] meter_profile_id
 330  *   Meter profile id.
 331  * @param[in] profile
 332  *   Pointer to meter profile detail.
 333  * @param[out] error
 334  *   Pointer to the error structure.
 335  *
 336  * @return
 337  *   0 on success, a negative errno value otherwise and rte_errno is set.
 338  */
 339 static int
 340 mlx5_flow_meter_profile_add(struct rte_eth_dev *dev,
 341                        uint32_t meter_profile_id,
 342                        struct rte_mtr_meter_profile *profile,
 343                        struct rte_mtr_error *error)
 344 {
 345         struct mlx5_priv *priv = dev->data->dev_private;
 346         struct mlx5_mtr_profiles *fmps = &priv->flow_meter_profiles;
 347         struct mlx5_flow_meter_profile *fmp;
 348         int ret;
 349
 350         if (!priv->mtr_en)
 351                 return -rte_mtr_error_set(error, ENOTSUP,
 352                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 353                                           "Meter is not supported");
 354         /* Check input params. */
 355         ret = mlx5_flow_meter_profile_validate(dev, meter_profile_id,
 356                                                profile, error);
 357         if (ret)
 358                 return ret;
 359         /* Meter profile memory allocation. */
 360         fmp = mlx5_malloc(MLX5_MEM_ZERO, sizeof(struct mlx5_flow_meter_profile),
 361                          RTE_CACHE_LINE_SIZE, SOCKET_ID_ANY);
 362         if (fmp == NULL)
 363                 return -rte_mtr_error_set(error, ENOMEM,
 364                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED,
 365                                           NULL, "Meter profile memory "
 366                                           "alloc failed.");
 367         /* Fill profile info. */
 368         fmp->meter_profile_id = meter_profile_id;
 369         fmp->profile = *profile;
 370         /* Fill the flow meter parameters for the PRM. */
 371         ret = mlx5_flow_meter_param_fill(fmp, error);
 372         if (ret)
 373                 goto error;
 374         /* Add to list. */
 375         TAILQ_INSERT_TAIL(fmps, fmp, next);
 376         return 0;
 377 error:
 378         mlx5_free(fmp);
 379         return ret;
 380 }
 381
 382 /**
 383  * Callback to delete MTR profile.
 384  *
 385  * @param[in] dev
 386  *   Pointer to Ethernet device.
 387  * @param[in] meter_profile_id
 388  *   Meter profile id.
 389  * @param[out] error
 390  *   Pointer to the error structure.
 391  *
 392  * @return
 393  *   0 on success, a negative errno value otherwise and rte_errno is set.
 394  */
 395 static int
 396 mlx5_flow_meter_profile_delete(struct rte_eth_dev *dev,
 397                           uint32_t meter_profile_id,
 398                           struct rte_mtr_error *error)
 399 {
 400         struct mlx5_priv *priv = dev->data->dev_private;
 401         struct mlx5_flow_meter_profile *fmp;
 402
 403         if (!priv->mtr_en)
 404                 return -rte_mtr_error_set(error, ENOTSUP,
 405                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 406                                           "Meter is not supported");
 407         /* Meter profile must exist. */
 408         fmp = mlx5_flow_meter_profile_find(priv, meter_profile_id);
 409         if (fmp == NULL)
 410                 return -rte_mtr_error_set(error, ENOENT,
 411                                           RTE_MTR_ERROR_TYPE_METER_PROFILE_ID,
 412                                           &meter_profile_id,
 413                                           "Meter profile id is invalid.");
 414         /* Check profile is unused. */
 415         if (fmp->ref_cnt)
 416                 return -rte_mtr_error_set(error, EBUSY,
 417                                           RTE_MTR_ERROR_TYPE_METER_PROFILE_ID,
 418                                           NULL, "Meter profile is in use.");
 419         /* Remove from list. */
 420         TAILQ_REMOVE(&priv->flow_meter_profiles, fmp, next);
 421         mlx5_free(fmp);
 422         return 0;
 423 }
 424
 425 /**
 426  * Convert wrong color setting action to verbose error.
 427  *
 428  * @param[in] action
 429  *   Policy color action.
 430  *
 431  * @return
 432  *   Verbose meter color error type.
 433  */
 434 static inline enum rte_mtr_error_type
 435 action2error(enum rte_mtr_policer_action action)
 436 {
 437         switch (action) {
 438         case MTR_POLICER_ACTION_COLOR_GREEN:
 439                 return RTE_MTR_ERROR_TYPE_POLICER_ACTION_GREEN;
 440         case MTR_POLICER_ACTION_COLOR_YELLOW:
 441                 return RTE_MTR_ERROR_TYPE_POLICER_ACTION_YELLOW;
 442         case MTR_POLICER_ACTION_COLOR_RED:
 443                 return RTE_MTR_ERROR_TYPE_POLICER_ACTION_RED;
 444         default:
 445                 break;
 446         }
 447         return RTE_MTR_ERROR_TYPE_UNSPECIFIED;
 448 }
 449
 450 /**
 451  * Check meter validation.
 452  *
 453  * @param[in] priv
 454  *   Pointer to mlx5 private data structure.
 455  * @param[in] meter_id
 456  *   Meter id.
 457  * @param[in] params
 458  *   Pointer to rte meter parameters.
 459  * @param[out] error
 460  *   Pointer to rte meter error structure.
 461  *
 462  * @return
 463  *   0 on success, a negative errno value otherwise and rte_errno is set.
 464  */
 465 static int
 466 mlx5_flow_meter_validate(struct mlx5_priv *priv, uint32_t meter_id,
 467                          struct rte_mtr_params *params,
 468                          struct rte_mtr_error *error)
 469 {
 470         static enum rte_mtr_policer_action
 471                                 valid_recol_action[RTE_COLORS] = {
 472                                                MTR_POLICER_ACTION_COLOR_GREEN,
 473                                                MTR_POLICER_ACTION_COLOR_YELLOW,
 474                                                MTR_POLICER_ACTION_COLOR_RED };
 475         int i;
 476
 477         /* Meter params must not be NULL. */
 478         if (params == NULL)
 479                 return -rte_mtr_error_set(error, EINVAL,
 480                                           RTE_MTR_ERROR_TYPE_MTR_PARAMS,
 481                                           NULL, "Meter object params null.");
 482         /* Previous meter color is not supported. */
 483         if (params->use_prev_mtr_color)
 484                 return -rte_mtr_error_set(error, ENOTSUP,
 485                                           RTE_MTR_ERROR_TYPE_MTR_PARAMS,
 486                                           NULL,
 487                                           "Previous meter color "
 488                                           "not supported.");
 489         /* Validate policer settings. */
 490         for (i = 0; i < RTE_COLORS; i++)
 491                 if (params->action[i] != valid_recol_action[i] &&
 492                     params->action[i] != MTR_POLICER_ACTION_DROP)
 493                         return -rte_mtr_error_set
 494                                         (error, ENOTSUP,
 495                                          action2error(params->action[i]), NULL,
 496                                          "Recolor action not supported.");
 497         /* Validate meter id. */
 498         if (mlx5_flow_meter_find(priv, meter_id))
 499                 return -rte_mtr_error_set(error, EEXIST,
 500                                           RTE_MTR_ERROR_TYPE_MTR_ID, NULL,
 501                                           "Meter object already exists.");
 502         return 0;
 503 }
 504
 505 /**
 506  * Modify the flow meter action.
 507  *
 508  * @param[in] priv
 509  *   Pointer to mlx5 private data structure.
 510  * @param[in] fm
 511  *   Pointer to flow meter to be modified.
 512  * @param[in] srtcm
 513  *   Pointer to meter srtcm description parameter.
 514  * @param[in] modify_bits
 515  *   The bit in srtcm to be updated.
 516  * @param[in] active_state
 517  *   The state to be updated.
 518  * @return
 519  *   0 on success, o negative value otherwise.
 520  */
 521 static int
 522 mlx5_flow_meter_action_modify(struct mlx5_priv *priv,
 523                 struct mlx5_flow_meter *fm,
 524                 const struct mlx5_flow_meter_srtcm_rfc2697_prm *srtcm,
 525                 uint64_t modify_bits, uint32_t active_state)
 526 {
 527 #ifdef HAVE_MLX5_DR_CREATE_ACTION_FLOW_METER
 528         uint32_t in[MLX5_ST_SZ_DW(flow_meter_parameters)] = { 0 };
 529         uint32_t *attr;
 530         struct mlx5dv_dr_flow_meter_attr mod_attr = { 0 };
 531         int ret;
 532
 533         /* Fill command parameters. */
 534         mod_attr.reg_c_index = priv->mtr_color_reg - REG_C_0;
 535         mod_attr.flow_meter_parameter = in;
 536         mod_attr.flow_meter_parameter_sz = fm->mfts->fmp_size;
 537         if (modify_bits & MLX5_FLOW_METER_OBJ_MODIFY_FIELD_ACTIVE)
 538                 mod_attr.active = !!active_state;
 539         else
 540                 mod_attr.active = 0;
 541         attr = in;
 542         if (modify_bits & MLX5_FLOW_METER_OBJ_MODIFY_FIELD_CBS) {
 543                 MLX5_SET(flow_meter_parameters,
 544                          attr, cbs_exponent, srtcm->cbs_exponent);
 545                 MLX5_SET(flow_meter_parameters,
 546                          attr, cbs_mantissa, srtcm->cbs_mantissa);
 547         }
 548         if (modify_bits & MLX5_FLOW_METER_OBJ_MODIFY_FIELD_CIR) {
 549                 MLX5_SET(flow_meter_parameters,
 550                          attr, cir_exponent, srtcm->cir_exponent);
 551                 MLX5_SET(flow_meter_parameters,
 552                          attr, cir_mantissa, srtcm->cir_mantissa);
 553         }
 554         if (modify_bits & MLX5_FLOW_METER_OBJ_MODIFY_FIELD_EBS) {
 555                 MLX5_SET(flow_meter_parameters,
 556                          attr, ebs_exponent, srtcm->ebs_exponent);
 557                 MLX5_SET(flow_meter_parameters,
 558                          attr, ebs_mantissa, srtcm->ebs_mantissa);
 559         }
 560         /* Apply modifications to meter only if it was created. */
 561         if (fm->mfts->meter_action) {
 562                 ret = mlx5_glue->dv_modify_flow_action_meter
 563                                         (fm->mfts->meter_action, &mod_attr,
 564                                         rte_cpu_to_be_64(modify_bits));
 565                 if (ret)
 566                         return ret;
 567         }
 568         /* Update succeedded modify meter parameters. */
 569         if (modify_bits & MLX5_FLOW_METER_OBJ_MODIFY_FIELD_ACTIVE)
 570                 fm->active_state = !!active_state;
 571         attr = fm->mfts->fmp;
 572         if (modify_bits & MLX5_FLOW_METER_OBJ_MODIFY_FIELD_CBS) {
 573                 MLX5_SET(flow_meter_parameters,
 574                          attr, cbs_exponent, srtcm->cbs_exponent);
 575                 MLX5_SET(flow_meter_parameters,
 576                          attr, cbs_mantissa, srtcm->cbs_mantissa);
 577         }
 578         if (modify_bits & MLX5_FLOW_METER_OBJ_MODIFY_FIELD_CIR) {
 579                 MLX5_SET(flow_meter_parameters,
 580                          attr, cir_exponent, srtcm->cir_exponent);
 581                 MLX5_SET(flow_meter_parameters,
 582                          attr, cir_mantissa, srtcm->cir_mantissa);
 583         }
 584         if (modify_bits & MLX5_FLOW_METER_OBJ_MODIFY_FIELD_EBS) {
 585                 MLX5_SET(flow_meter_parameters,
 586                          attr, ebs_exponent, srtcm->ebs_exponent);
 587                 MLX5_SET(flow_meter_parameters,
 588                          attr, ebs_mantissa, srtcm->ebs_mantissa);
 589         }
 590
 591         return 0;
 592 #else
 593         (void)priv;
 594         (void)fm;
 595         (void)srtcm;
 596         (void)modify_bits;
 597         (void)active_state;
 598         return -ENOTSUP;
 599 #endif
 600 }
 601
 602 /**
 603  * Create meter rules.
 604  *
 605  * @param[in] dev
 606  *   Pointer to Ethernet device.
 607  * @param[in] meter_id
 608  *   Meter id.
 609  * @param[in] params
 610  *   Pointer to rte meter parameters.
 611  * @param[in] shared
 612  *   Meter shared with other flow or not.
 613  * @param[out] error
 614  *   Pointer to rte meter error structure.
 615  *
 616  * @return
 617  *   0 on success, a negative errno value otherwise and rte_errno is set.
 618  */
 619 static int
 620 mlx5_flow_meter_create(struct rte_eth_dev *dev, uint32_t meter_id,
 621                        struct rte_mtr_params *params, int shared,
 622                        struct rte_mtr_error *error)
 623 {
 624         struct mlx5_priv *priv = dev->data->dev_private;
 625         struct mlx5_flow_meters *fms = &priv->flow_meters;
 626         struct mlx5_flow_meter_profile *fmp;
 627         struct mlx5_flow_meter *fm;
 628         const struct rte_flow_attr attr = {
 629                                 .ingress = 1,
 630                                 .egress = 1,
 631                                 .transfer = priv->config.dv_esw_en ? 1 : 0,
 632                         };
 633         int ret;
 634         unsigned int i;
 635         uint32_t idx = 0;
 636
 637         if (!priv->mtr_en)
 638                 return -rte_mtr_error_set(error, ENOTSUP,
 639                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 640                                           "Meter is not supported");
 641         /* Validate the parameters. */
 642         ret = mlx5_flow_meter_validate(priv, meter_id, params, error);
 643         if (ret)
 644                 return ret;
 645         /* Meter profile must exist. */
 646         fmp = mlx5_flow_meter_profile_find(priv, params->meter_profile_id);
 647         if (fmp == NULL)
 648                 return -rte_mtr_error_set(error, ENOENT,
 649                                           RTE_MTR_ERROR_TYPE_METER_PROFILE_ID,
 650                                           NULL, "Meter profile id not valid.");
 651         /* Allocate the flow meter memory. */
 652         fm = mlx5_ipool_zmalloc(priv->sh->ipool[MLX5_IPOOL_MTR], &idx);
 653         if (fm == NULL)
 654                 return -rte_mtr_error_set(error, ENOMEM,
 655                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 656                                           "Memory alloc failed for meter.");
 657         fm->idx = idx;
 658         /* Fill the flow meter parameters. */
 659         fm->meter_id = meter_id;
 660         fm->profile = fmp;
 661         memcpy(fm->action, params->action, sizeof(params->action));
 662         fm->stats_mask = params->stats_mask;
 663
 664         /* Alloc policer counters. */
 665         for (i = 0; i < RTE_DIM(fm->policer_stats.cnt); i++) {
 666                 fm->policer_stats.cnt[i] = mlx5_counter_alloc(dev);
 667                 if (!fm->policer_stats.cnt[i])
 668                         goto error;
 669         }
 670         fm->mfts = mlx5_flow_create_mtr_tbls(dev, fm);
 671         if (!fm->mfts)
 672                 goto error;
 673         ret = mlx5_flow_create_policer_rules(dev, fm, &attr);
 674         if (ret)
 675                 goto error;
 676         /* Add to the flow meter list. */
 677         TAILQ_INSERT_TAIL(fms, fm, next);
 678         fm->active_state = 1; /* Config meter starts as active. */
 679         fm->shared = !!shared;
 680         fm->policer_stats.stats_mask = params->stats_mask;
 681         fm->profile->ref_cnt++;
 682         return 0;
 683 error:
 684         mlx5_flow_destroy_policer_rules(dev, fm, &attr);
 685         mlx5_flow_destroy_mtr_tbls(dev, fm->mfts);
 686         /* Free policer counters. */
 687         for (i = 0; i < RTE_DIM(fm->policer_stats.cnt); i++)
 688                 if (fm->policer_stats.cnt[i])
 689                         mlx5_counter_free(dev, fm->policer_stats.cnt[i]);
 690         mlx5_ipool_free(priv->sh->ipool[MLX5_IPOOL_MTR], idx);
 691         return -rte_mtr_error_set(error, -ret,
 692                                   RTE_MTR_ERROR_TYPE_UNSPECIFIED,
 693                                   NULL, "Failed to create devx meter.");
 694 }
 695
 696 /**
 697  * Destroy meter rules.
 698  *
 699  * @param[in] dev
 700  *   Pointer to Ethernet device.
 701  * @param[in] meter_id
 702  *   Meter id.
 703  * @param[out] error
 704  *   Pointer to rte meter error structure.
 705  *
 706  * @return
 707  *   0 on success, a negative errno value otherwise and rte_errno is set.
 708  */
 709 static int
 710 mlx5_flow_meter_destroy(struct rte_eth_dev *dev, uint32_t meter_id,
 711                         struct rte_mtr_error *error)
 712 {
 713         struct mlx5_priv *priv = dev->data->dev_private;
 714         struct mlx5_flow_meters *fms = &priv->flow_meters;
 715         struct mlx5_flow_meter_profile *fmp;
 716         struct mlx5_flow_meter *fm;
 717         const struct rte_flow_attr attr = {
 718                                 .ingress = 1,
 719                                 .egress = 1,
 720                                 .transfer = priv->config.dv_esw_en ? 1 : 0,
 721                         };
 722         unsigned int i;
 723
 724         if (!priv->mtr_en)
 725                 return -rte_mtr_error_set(error, ENOTSUP,
 726                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 727                                           "Meter is not supported");
 728         /* Meter object must exist. */
 729         fm = mlx5_flow_meter_find(priv, meter_id);
 730         if (fm == NULL)
 731                 return -rte_mtr_error_set(error, ENOENT,
 732                                           RTE_MTR_ERROR_TYPE_MTR_ID,
 733                                           NULL, "Meter object id not valid.");
 734         /* Meter object must not have any owner. */
 735         if (fm->ref_cnt > 0)
 736                 return -rte_mtr_error_set(error, EBUSY,
 737                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED,
 738                                           NULL, "Meter object is being used.");
 739         /* Get the meter profile. */
 740         fmp = fm->profile;
 741         MLX5_ASSERT(fmp);
 742         /* Update dependencies. */
 743         fmp->ref_cnt--;
 744         /* Remove from the flow meter list. */
 745         TAILQ_REMOVE(fms, fm, next);
 746         /* Free policer counters. */
 747         for (i = 0; i < RTE_DIM(fm->policer_stats.cnt); i++)
 748                 if (fm->policer_stats.cnt[i])
 749                         mlx5_counter_free(dev, fm->policer_stats.cnt[i]);
 750         /* Free meter flow table */
 751         mlx5_flow_destroy_policer_rules(dev, fm, &attr);
 752         mlx5_flow_destroy_mtr_tbls(dev, fm->mfts);
 753         mlx5_ipool_free(priv->sh->ipool[MLX5_IPOOL_MTR], fm->idx);
 754         return 0;
 755 }
 756
 757 /**
 758  * Modify meter state.
 759  *
 760  * @param[in] priv
 761  *   Pointer to mlx5 private data structure.
 762  * @param[in] fm
 763  *   Pointer to flow meter.
 764  * @param[in] new_state
 765  *   New state to update.
 766  * @param[out] error
 767  *   Pointer to rte meter error structure.
 768  *
 769  * @return
 770  *   0 on success, a negative errno value otherwise and rte_errno is set.
 771  */
 772 static int
 773 mlx5_flow_meter_modify_state(struct mlx5_priv *priv,
 774                              struct mlx5_flow_meter *fm,
 775                              uint32_t new_state,
 776                              struct rte_mtr_error *error)
 777 {
 778         static const struct mlx5_flow_meter_srtcm_rfc2697_prm srtcm = {
 779                 .cbs_exponent = 20,
 780                 .cbs_mantissa = 191,
 781                 .cir_exponent = 0,
 782                 .cir_mantissa = 200,
 783                 .ebs_exponent = 0,
 784                 .ebs_mantissa = 0,
 785         };
 786         uint64_t modify_bits = MLX5_FLOW_METER_OBJ_MODIFY_FIELD_CBS |
 787                                MLX5_FLOW_METER_OBJ_MODIFY_FIELD_CIR;
 788         int ret;
 789
 790         if (new_state == MLX5_FLOW_METER_DISABLE)
 791                 ret = mlx5_flow_meter_action_modify(priv, fm, &srtcm,
 792                                                     modify_bits, 0);
 793         else
 794                 ret = mlx5_flow_meter_action_modify(priv, fm,
 795                                                    &fm->profile->srtcm_prm,
 796                                                     modify_bits, 0);
 797         if (ret)
 798                 return -rte_mtr_error_set(error, -ret,
 799                                           RTE_MTR_ERROR_TYPE_MTR_PARAMS,
 800                                           NULL,
 801                                           new_state ?
 802                                           "Failed to enable meter." :
 803                                           "Failed to disable meter.");
 804         return 0;
 805 }
 806
 807 /**
 808  * Callback to enable flow meter.
 809  *
 810  * @param[in] dev
 811  *   Pointer to Ethernet device.
 812  * @param[in] meter_id
 813  *   Meter id.
 814  * @param[out] error
 815  *   Pointer to rte meter error structure.
 816  *
 817  * @return
 818  *   0 on success, a negative errno value otherwise and rte_errno is set.
 819  */
 820 static int
 821 mlx5_flow_meter_enable(struct rte_eth_dev *dev,
 822                        uint32_t meter_id,
 823                        struct rte_mtr_error *error)
 824 {
 825         struct mlx5_priv *priv = dev->data->dev_private;
 826         struct mlx5_flow_meter *fm;
 827         int ret;
 828
 829         if (!priv->mtr_en)
 830                 return -rte_mtr_error_set(error, ENOTSUP,
 831                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 832                                           "Meter is not supported");
 833         /* Meter object must exist. */
 834         fm = mlx5_flow_meter_find(priv, meter_id);
 835         if (fm == NULL)
 836                 return -rte_mtr_error_set(error, ENOENT,
 837                                           RTE_MTR_ERROR_TYPE_MTR_ID,
 838                                           NULL, "Meter not found.");
 839         if (fm->active_state == MLX5_FLOW_METER_ENABLE)
 840                 return 0;
 841         ret = mlx5_flow_meter_modify_state(priv, fm, MLX5_FLOW_METER_ENABLE,
 842                                            error);
 843         if (!ret)
 844                 fm->active_state = MLX5_FLOW_METER_ENABLE;
 845         return ret;
 846 }
 847
 848 /**
 849  * Callback to disable flow meter.
 850  *
 851  * @param[in] dev
 852  *   Pointer to Ethernet device.
 853  * @param[in] meter_id
 854  *   Meter id.
 855  * @param[out] error
 856  *   Pointer to rte meter error structure.
 857  *
 858  * @return
 859  *   0 on success, a negative errno value otherwise and rte_errno is set.
 860  */
 861 static int
 862 mlx5_flow_meter_disable(struct rte_eth_dev *dev,
 863                         uint32_t meter_id,
 864                         struct rte_mtr_error *error)
 865 {
 866         struct mlx5_priv *priv = dev->data->dev_private;
 867         struct mlx5_flow_meter *fm;
 868         int ret;
 869
 870         if (!priv->mtr_en)
 871                 return -rte_mtr_error_set(error, ENOTSUP,
 872                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 873                                           "Meter is not supported");
 874         /* Meter object must exist. */
 875         fm = mlx5_flow_meter_find(priv, meter_id);
 876         if (fm == NULL)
 877                 return -rte_mtr_error_set(error, ENOENT,
 878                                           RTE_MTR_ERROR_TYPE_MTR_ID,
 879                                           NULL, "Meter not found.");
 880         if (fm->active_state == MLX5_FLOW_METER_DISABLE)
 881                 return 0;
 882         ret = mlx5_flow_meter_modify_state(priv, fm, MLX5_FLOW_METER_DISABLE,
 883                                            error);
 884         if (!ret)
 885                 fm->active_state = MLX5_FLOW_METER_DISABLE;
 886         return ret;
 887 }
 888
 889 /**
 890  * Callback to update meter profile.
 891  *
 892  * @param[in] dev
 893  *   Pointer to Ethernet device.
 894  * @param[in] meter_id
 895  *   Meter id.
 896  * @param[in] meter_profile_id
 897  *   To be updated meter profile id.
 898  * @param[out] error
 899  *   Pointer to rte meter error structure.
 900  *
 901  * @return
 902  *   0 on success, a negative errno value otherwise and rte_errno is set.
 903  */
 904 static int
 905 mlx5_flow_meter_profile_update(struct rte_eth_dev *dev,
 906                                uint32_t meter_id,
 907                                uint32_t meter_profile_id,
 908                                struct rte_mtr_error *error)
 909 {
 910         struct mlx5_priv *priv = dev->data->dev_private;
 911         struct mlx5_flow_meter_profile *fmp;
 912         struct mlx5_flow_meter_profile *old_fmp;
 913         struct mlx5_flow_meter *fm;
 914         uint64_t modify_bits = MLX5_FLOW_METER_OBJ_MODIFY_FIELD_CBS |
 915                                MLX5_FLOW_METER_OBJ_MODIFY_FIELD_CIR;
 916         int ret;
 917
 918         if (!priv->mtr_en)
 919                 return -rte_mtr_error_set(error, ENOTSUP,
 920                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 921                                           "Meter is not supported");
 922         /* Meter profile must exist. */
 923         fmp = mlx5_flow_meter_profile_find(priv, meter_profile_id);
 924         if (fmp == NULL)
 925                 return -rte_mtr_error_set(error, ENOENT,
 926                                           RTE_MTR_ERROR_TYPE_METER_PROFILE_ID,
 927                                           NULL, "Meter profile not found.");
 928         /* Meter object must exist. */
 929         fm = mlx5_flow_meter_find(priv, meter_id);
 930         if (fm == NULL)
 931                 return -rte_mtr_error_set(error, ENOENT,
 932                                           RTE_MTR_ERROR_TYPE_MTR_ID,
 933                                           NULL, "Meter not found.");
 934         /* MTR object already set to meter profile id. */
 935         old_fmp = fm->profile;
 936         if (fmp == old_fmp)
 937                 return 0;
 938         /* Update the profile. */
 939         fm->profile = fmp;
 940         /* Update meter params in HW (if not disabled). */
 941         if (fm->active_state == MLX5_FLOW_METER_DISABLE)
 942                 return 0;
 943         ret = mlx5_flow_meter_action_modify(priv, fm, &fm->profile->srtcm_prm,
 944                                               modify_bits, fm->active_state);
 945         if (ret) {
 946                 fm->profile = old_fmp;
 947                 return -rte_mtr_error_set(error, -ret,
 948                                           RTE_MTR_ERROR_TYPE_MTR_PARAMS,
 949                                           NULL, "Failed to update meter"
 950                                           " parmeters in hardware.");
 951         }
 952         old_fmp->ref_cnt--;
 953         fmp->ref_cnt++;
 954         return 0;
 955 }
 956
 957 /**
 958  * Callback to update meter stats mask.
 959  *
 960  * @param[in] dev
 961  *   Pointer to Ethernet device.
 962  * @param[in] meter_id
 963  *   Meter id.
 964  * @param[in] stats_mask
 965  *   To be updated stats_mask.
 966  * @param[out] error
 967  *   Pointer to rte meter error structure.
 968  *
 969  * @return
 970  *   0 on success, a negative errno value otherwise and rte_errno is set.
 971  */
 972 static int
 973 mlx5_flow_meter_stats_update(struct rte_eth_dev *dev,
 974                              uint32_t meter_id,
 975                              uint64_t stats_mask,
 976                              struct rte_mtr_error *error)
 977 {
 978         struct mlx5_priv *priv = dev->data->dev_private;
 979         struct mlx5_flow_meter *fm;
 980
 981         if (!priv->mtr_en)
 982                 return -rte_mtr_error_set(error, ENOTSUP,
 983                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
 984                                           "Meter is not supported");
 985         /* Meter object must exist. */
 986         fm = mlx5_flow_meter_find(priv, meter_id);
 987         if (fm == NULL)
 988                 return -rte_mtr_error_set(error, ENOENT,
 989                                           RTE_MTR_ERROR_TYPE_MTR_ID,
 990                                           NULL, "Meter object id not valid.");
 991         fm->policer_stats.stats_mask = stats_mask;
 992         return 0;
 993 }
 994
 995 /**
 996  * Callback to read meter statistics.
 997  *
 998  * @param[in] dev
 999  *   Pointer to Ethernet device.
1000  * @param[in] meter_id
1001  *   Meter id.
1002  * @param[out] stats
1003  *   Pointer to store the statistics.
1004  * @param[out] stats_mask
1005  *   Pointer to store the stats_mask.
1006  * @param[in] clear
1007  *   Statistic to be cleared after read or not.
1008  * @param[out] error
1009  *   Pointer to rte meter error structure.
1010  *
1011  * @return
1012  *   0 on success, a negative errno value otherwise and rte_errno is set.
1013  */
1014 static int
1015 mlx5_flow_meter_stats_read(struct rte_eth_dev *dev,
1016                            uint32_t meter_id,
1017                            struct rte_mtr_stats *stats,
1018                            uint64_t *stats_mask,
1019                            int clear,
1020                            struct rte_mtr_error *error)
1021 {
1022         static uint64_t meter2mask[RTE_MTR_DROPPED + 1] = {
1023                 RTE_MTR_STATS_N_PKTS_GREEN | RTE_MTR_STATS_N_BYTES_GREEN,
1024                 RTE_MTR_STATS_N_PKTS_YELLOW | RTE_MTR_STATS_N_BYTES_YELLOW,
1025                 RTE_MTR_STATS_N_PKTS_RED | RTE_MTR_STATS_N_BYTES_RED,
1026                 RTE_MTR_STATS_N_PKTS_DROPPED | RTE_MTR_STATS_N_BYTES_DROPPED
1027         };
1028         struct mlx5_priv *priv = dev->data->dev_private;
1029         struct mlx5_flow_meter *fm;
1030         struct mlx5_flow_policer_stats *ps;
1031         uint64_t pkts_dropped = 0;
1032         uint64_t bytes_dropped = 0;
1033         uint64_t pkts;
1034         uint64_t bytes;
1035         int i;
1036         int ret = 0;
1037
1038         if (!priv->mtr_en)
1039                 return -rte_mtr_error_set(error, ENOTSUP,
1040                                           RTE_MTR_ERROR_TYPE_UNSPECIFIED, NULL,
1041                                           "Meter is not supported");
1042         /* Meter object must exist. */
1043         fm = mlx5_flow_meter_find(priv, meter_id);
1044         if (fm == NULL)
1045                 return -rte_mtr_error_set(error, ENOENT,
1046                                           RTE_MTR_ERROR_TYPE_MTR_ID,
1047                                           NULL, "Meter object id not valid.");
1048         ps = &fm->policer_stats;
1049         *stats_mask = ps->stats_mask;
1050         for (i = 0; i < RTE_MTR_DROPPED; i++) {
1051                 if (*stats_mask & meter2mask[i]) {
1052                         ret = mlx5_counter_query(dev, ps->cnt[i], clear, &pkts,
1053                                                  &bytes);
1054                         if (ret)
1055                                 goto error;
1056                         if (fm->action[i] == MTR_POLICER_ACTION_DROP) {
1057                                 pkts_dropped += pkts;
1058                                 bytes_dropped += bytes;
1059                         }
1060                         /* If need to read the packets, set it. */
1061                         if ((1 << i) & (*stats_mask & meter2mask[i]))
1062                                 stats->n_pkts[i] = pkts;
1063                         /* If need to read the bytes, set it. */
1064                         if ((1 << (RTE_MTR_DROPPED + 1 + i)) &
1065                            (*stats_mask & meter2mask[i]))
1066                                 stats->n_bytes[i] = bytes;
1067                 }
1068         }
1069         /* Dropped packets/bytes are treated differently. */
1070         if (*stats_mask & meter2mask[i]) {
1071                 ret = mlx5_counter_query(dev, ps->cnt[i], clear, &pkts,
1072                                          &bytes);
1073                 if (ret)
1074                         goto error;
1075                 pkts += pkts_dropped;
1076                 bytes += bytes_dropped;
1077                 /* If need to read the packets, set it. */
1078                 if ((*stats_mask & meter2mask[i]) &
1079                    RTE_MTR_STATS_N_PKTS_DROPPED)
1080                         stats->n_pkts_dropped = pkts;
1081                 /* If need to read the bytes, set it. */
1082                 if ((*stats_mask & meter2mask[i]) &
1083                    RTE_MTR_STATS_N_BYTES_DROPPED)
1084                         stats->n_bytes_dropped = bytes;
1085         }
1086         return 0;
1087 error:
1088         return -rte_mtr_error_set(error, ret, RTE_MTR_ERROR_TYPE_STATS, NULL,
1089                                  "Failed to read policer counters.");
1090 }
1091
1092 static const struct rte_mtr_ops mlx5_flow_mtr_ops = {
1093         .capabilities_get = mlx5_flow_mtr_cap_get,
1094         .meter_profile_add = mlx5_flow_meter_profile_add,
1095         .meter_profile_delete = mlx5_flow_meter_profile_delete,
1096         .create = mlx5_flow_meter_create,
1097         .destroy = mlx5_flow_meter_destroy,
1098         .meter_enable = mlx5_flow_meter_enable,
1099         .meter_disable = mlx5_flow_meter_disable,
1100         .meter_profile_update = mlx5_flow_meter_profile_update,
1101         .meter_dscp_table_update = NULL,
1102         .policer_actions_update = NULL,
1103         .stats_update = mlx5_flow_meter_stats_update,
1104         .stats_read = mlx5_flow_meter_stats_read,
1105 };
1106
1107 /**
1108  * Get meter operations.
1109  *
1110  * @param dev
1111  *   Pointer to Ethernet device structure.
1112  * @param arg
1113  *   Pointer to set the mtr operations.
1114  *
1115  * @return
1116  *   Always 0.
1117  */
1118 int
1119 mlx5_flow_meter_ops_get(struct rte_eth_dev *dev __rte_unused, void *arg)
1120 {
1121         *(const struct rte_mtr_ops **)arg = &mlx5_flow_mtr_ops;
1122         return 0;
1123 }
1124
1125 /**
1126  * Find meter by id.
1127  *
1128  * @param priv
1129  *   Pointer to mlx5_priv.
1130  * @param meter_id
1131  *   Meter id.
1132  *
1133  * @return
1134  *   Pointer to the profile found on success, NULL otherwise.
1135  */
1136 struct mlx5_flow_meter *
1137 mlx5_flow_meter_find(struct mlx5_priv *priv, uint32_t meter_id)
1138 {
1139         struct mlx5_flow_meters *fms = &priv->flow_meters;
1140         struct mlx5_flow_meter *fm;
1141
1142         TAILQ_FOREACH(fm, fms, next)
1143                 if (meter_id == fm->meter_id)
1144                         return fm;
1145         return NULL;
1146 }
1147
1148 /**
1149  * Attach meter to flow.
1150  * Unidirectional Meter creation can only be done
1151  * when flow direction is known, i.e. when calling meter_attach.
1152  *
1153  * @param [in] priv
1154  *  Pointer to mlx5 private data.
1155  * @param [in] meter_id
1156  *  Flow meter id.
1157  * @param [in] attr
1158  *  Pointer to flow attributes.
1159  * @param [out] error
1160  *  Pointer to error structure.
1161  *
1162  * @return the flow meter pointer, NULL otherwise.
1163  */
1164 struct mlx5_flow_meter *
1165 mlx5_flow_meter_attach(struct mlx5_priv *priv, uint32_t meter_id,
1166                        const struct rte_flow_attr *attr,
1167                        struct rte_flow_error *error)
1168 {
1169         struct mlx5_flow_meter *fm;
1170
1171         fm = mlx5_flow_meter_find(priv, meter_id);
1172         if (fm == NULL) {
1173                 rte_flow_error_set(error, ENOENT,
1174                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1175                                    "Meter object id not valid");
1176                 goto error;
1177         }
1178         if (!fm->shared && fm->ref_cnt) {
1179                 DRV_LOG(ERR, "Cannot share a non-shared meter.");
1180                 rte_flow_error_set(error, EINVAL,
1181                                   RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1182                                   "Meter can't be shared");
1183                 goto error;
1184         }
1185         if (!fm->ref_cnt++) {
1186                 MLX5_ASSERT(!fm->mfts->meter_action);
1187                 fm->ingress = attr->ingress;
1188                 fm->egress = attr->egress;
1189                 fm->transfer = attr->transfer;
1190                 /* This also creates the meter object. */
1191                 fm->mfts->meter_action = mlx5_flow_meter_action_create(priv,
1192                                                                        fm);
1193                 if (!fm->mfts->meter_action)
1194                         goto error_detach;
1195         } else {
1196                 MLX5_ASSERT(fm->mfts->meter_action);
1197                 if (attr->transfer != fm->transfer ||
1198                     attr->ingress != fm->ingress ||
1199                     attr->egress != fm->egress) {
1200                         DRV_LOG(ERR, "meter I/O attributes do not "
1201                                 "match flow I/O attributes.");
1202                         goto error_detach;
1203                 }
1204         }
1205         return fm;
1206 error_detach:
1207         mlx5_flow_meter_detach(fm);
1208         rte_flow_error_set(error, EINVAL, RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1209                           fm->mfts->meter_action ? "Meter attr not match" :
1210                           "Meter action create failed");
1211 error:
1212         return NULL;
1213 }
1214
1215 /**
1216  * Detach meter from flow.
1217  *
1218  * @param [in] fm
1219  *  Pointer to flow meter.
1220  */
1221 void
1222 mlx5_flow_meter_detach(struct mlx5_flow_meter *fm)
1223 {
1224         MLX5_ASSERT(fm->ref_cnt);
1225         if (--fm->ref_cnt)
1226                 return;
1227         if (fm->mfts->meter_action)
1228                 mlx5_glue->destroy_flow_action(fm->mfts->meter_action);
1229         fm->mfts->meter_action = NULL;
1230         fm->ingress = 0;
1231         fm->egress = 0;
1232         fm->transfer = 0;
1233 }
1234
1235 /**
1236  * Flush meter configuration.
1237  *
1238  * @param[in] dev
1239  *   Pointer to Ethernet device.
1240  * @param[out] error
1241  *   Pointer to rte meter error structure.
1242  *
1243  * @return
1244  *   0 on success, a negative errno value otherwise and rte_errno is set.
1245  */
1246 int
1247 mlx5_flow_meter_flush(struct rte_eth_dev *dev, struct rte_mtr_error *error)
1248 {
1249         struct mlx5_priv *priv = dev->data->dev_private;
1250         struct mlx5_flow_meters *fms = &priv->flow_meters;
1251         struct mlx5_mtr_profiles *fmps = &priv->flow_meter_profiles;
1252         struct mlx5_flow_meter_profile *fmp;
1253         struct mlx5_flow_meter *fm;
1254         const struct rte_flow_attr attr = {
1255                                 .ingress = 1,
1256                                 .egress = 1,
1257                                 .transfer = priv->config.dv_esw_en ? 1 : 0,
1258                         };
1259         void *tmp;
1260         uint32_t i;
1261
1262         TAILQ_FOREACH_SAFE(fm, fms, next, tmp) {
1263                 /* Meter object must not have any owner. */
1264                 MLX5_ASSERT(!fm->ref_cnt);
1265                 /* Get meter profile. */
1266                 fmp = fm->profile;
1267                 if (fmp == NULL)
1268                         return -rte_mtr_error_set(error, EINVAL,
1269                                 RTE_MTR_ERROR_TYPE_METER_PROFILE_ID,
1270                                 NULL, "MTR object meter profile invalid.");
1271                 /* Update dependencies. */
1272                 fmp->ref_cnt--;
1273                 /* Remove from list. */
1274                 TAILQ_REMOVE(fms, fm, next);
1275                 /* Free policer counters. */
1276                 for (i = 0; i < RTE_DIM(fm->policer_stats.cnt); i++)
1277                         if (fm->policer_stats.cnt[i])
1278                                 mlx5_counter_free(dev,
1279                                                   fm->policer_stats.cnt[i]);
1280                 /* Free meter flow table. */
1281                 mlx5_flow_destroy_policer_rules(dev, fm, &attr);
1282                 mlx5_flow_destroy_mtr_tbls(dev, fm->mfts);
1283                 mlx5_ipool_free(priv->sh->ipool[MLX5_IPOOL_MTR], fm->idx);
1284         }
1285         TAILQ_FOREACH_SAFE(fmp, fmps, next, tmp) {
1286                 /* Check unused. */
1287                 MLX5_ASSERT(!fmp->ref_cnt);
1288                 /* Remove from list. */
1289                 TAILQ_REMOVE(&priv->flow_meter_profiles, fmp, next);
1290                 mlx5_free(fmp);
1291         }
1292         return 0;
1293 }