drivers/net/mlx5/mlx5_flow_aso.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2020 Mellanox Technologies, Ltd
   3  */
   4 #include <mlx5_prm.h>
   5 #include <rte_malloc.h>
   6 #include <rte_cycles.h>
   7 #include <rte_eal_paging.h>
   8
   9 #include <mlx5_malloc.h>
  10 #include <mlx5_common_os.h>
  11 #include <mlx5_common_devx.h>
  12
  13 #include "mlx5.h"
  14 #include "mlx5_flow.h"
  15
  16 /**
  17  * Destroy Completion Queue used for ASO access.
  18  *
  19  * @param[in] cq
  20  *   ASO CQ to destroy.
  21  */
  22 static void
  23 mlx5_aso_cq_destroy(struct mlx5_aso_cq *cq)
  24 {
  25         if (cq->cq_obj.cq)
  26                 mlx5_devx_cq_destroy(&cq->cq_obj);
  27         memset(cq, 0, sizeof(*cq));
  28 }
  29
  30 /**
  31  * Create Completion Queue used for ASO access.
  32  *
  33  * @param[in] ctx
  34  *   Context returned from mlx5 open_device() glue function.
  35  * @param[in/out] cq
  36  *   Pointer to CQ to create.
  37  * @param[in] log_desc_n
  38  *   Log of number of descriptors in queue.
  39  * @param[in] socket
  40  *   Socket to use for allocation.
  41  * @param[in] uar_page_id
  42  *   UAR page ID to use.
  43  *
  44  * @return
  45  *   0 on success, a negative errno value otherwise and rte_errno is set.
  46  */
  47 static int
  48 mlx5_aso_cq_create(void *ctx, struct mlx5_aso_cq *cq, uint16_t log_desc_n,
  49                    int socket, int uar_page_id)
  50 {
  51         struct mlx5_devx_cq_attr attr = {
  52                 .uar_page_id = uar_page_id,
  53         };
  54
  55         cq->log_desc_n = log_desc_n;
  56         cq->cq_ci = 0;
  57         return mlx5_devx_cq_create(ctx, &cq->cq_obj, log_desc_n, &attr, socket);
  58 }
  59
  60 /**
  61  * Free MR resources.
  62  *
  63  * @param[in] sh
  64  *   Pointer to shared device context.
  65  * @param[in] mr
  66  *   MR to free.
  67  */
  68 static void
  69 mlx5_aso_dereg_mr(struct mlx5_dev_ctx_shared *sh, struct mlx5_pmd_mr *mr)
  70 {
  71         void *addr = mr->addr;
  72
  73         sh->share_cache.dereg_mr_cb(mr);
  74         mlx5_free(addr);
  75         memset(mr, 0, sizeof(*mr));
  76 }
  77
  78 /**
  79  * Register Memory Region.
  80  *
  81  * @param[in] sh
  82  *   Pointer to shared device context.
  83  * @param[in] length
  84  *   Size of MR buffer.
  85  * @param[in/out] mr
  86  *   Pointer to MR to create.
  87  * @param[in] socket
  88  *   Socket to use for allocation.
  89  *
  90  * @return
  91  *   0 on success, a negative errno value otherwise and rte_errno is set.
  92  */
  93 static int
  94 mlx5_aso_reg_mr(struct mlx5_dev_ctx_shared *sh, size_t length,
  95                 struct mlx5_pmd_mr *mr, int socket)
  96 {
  97
  98         int ret;
  99
 100         mr->addr = mlx5_malloc(MLX5_MEM_RTE | MLX5_MEM_ZERO, length, 4096,
 101                                socket);
 102         if (!mr->addr) {
 103                 DRV_LOG(ERR, "Failed to create ASO bits mem for MR.");
 104                 return -1;
 105         }
 106         ret = sh->share_cache.reg_mr_cb(sh->pd, mr->addr, length, mr);
 107         if (ret) {
 108                 DRV_LOG(ERR, "Failed to create direct Mkey.");
 109                 mlx5_free(mr->addr);
 110                 return -1;
 111         }
 112         return 0;
 113 }
 114
 115 /**
 116  * Destroy Send Queue used for ASO access.
 117  *
 118  * @param[in] sq
 119  *   ASO SQ to destroy.
 120  */
 121 static void
 122 mlx5_aso_destroy_sq(struct mlx5_aso_sq *sq)
 123 {
 124         mlx5_devx_sq_destroy(&sq->sq_obj);
 125         mlx5_aso_cq_destroy(&sq->cq);
 126         memset(sq, 0, sizeof(*sq));
 127 }
 128
 129 /**
 130  * Initialize Send Queue used for ASO access.
 131  *
 132  * @param[in] sq
 133  *   ASO SQ to initialize.
 134  */
 135 static void
 136 mlx5_aso_age_init_sq(struct mlx5_aso_sq *sq)
 137 {
 138         volatile struct mlx5_aso_wqe *restrict wqe;
 139         int i;
 140         int size = 1 << sq->log_desc_n;
 141         uint64_t addr;
 142
 143         /* All the next fields state should stay constant. */
 144         for (i = 0, wqe = &sq->sq_obj.aso_wqes[0]; i < size; ++i, ++wqe) {
 145                 wqe->general_cseg.sq_ds = rte_cpu_to_be_32((sq->sqn << 8) |
 146                                                           (sizeof(*wqe) >> 4));
 147                 wqe->aso_cseg.lkey = rte_cpu_to_be_32(sq->mr.lkey);
 148                 addr = (uint64_t)((uint64_t *)sq->mr.addr + i *
 149                                             MLX5_ASO_AGE_ACTIONS_PER_POOL / 64);
 150                 wqe->aso_cseg.va_h = rte_cpu_to_be_32((uint32_t)(addr >> 32));
 151                 wqe->aso_cseg.va_l_r = rte_cpu_to_be_32((uint32_t)addr | 1u);
 152                 wqe->aso_cseg.operand_masks = rte_cpu_to_be_32
 153                         (0u |
 154                          (ASO_OPER_LOGICAL_OR << ASO_CSEG_COND_OPER_OFFSET) |
 155                          (ASO_OP_ALWAYS_TRUE << ASO_CSEG_COND_1_OPER_OFFSET) |
 156                          (ASO_OP_ALWAYS_TRUE << ASO_CSEG_COND_0_OPER_OFFSET) |
 157                          (BYTEWISE_64BYTE << ASO_CSEG_DATA_MASK_MODE_OFFSET));
 158                 wqe->aso_cseg.data_mask = RTE_BE64(UINT64_MAX);
 159         }
 160 }
 161
 162 /**
 163  * Initialize Send Queue used for ASO flow meter access.
 164  *
 165  * @param[in] sq
 166  *   ASO SQ to initialize.
 167  */
 168 static void
 169 mlx5_aso_mtr_init_sq(struct mlx5_aso_sq *sq)
 170 {
 171         volatile struct mlx5_aso_wqe *restrict wqe;
 172         int i;
 173         int size = 1 << sq->log_desc_n;
 174
 175         /* All the next fields state should stay constant. */
 176         for (i = 0, wqe = &sq->sq_obj.aso_wqes[0]; i < size; ++i, ++wqe) {
 177                 wqe->general_cseg.sq_ds = rte_cpu_to_be_32((sq->sqn << 8) |
 178                                                           (sizeof(*wqe) >> 4));
 179                 wqe->aso_cseg.operand_masks = RTE_BE32(0u |
 180                          (ASO_OPER_LOGICAL_OR << ASO_CSEG_COND_OPER_OFFSET) |
 181                          (ASO_OP_ALWAYS_TRUE << ASO_CSEG_COND_1_OPER_OFFSET) |
 182                          (ASO_OP_ALWAYS_TRUE << ASO_CSEG_COND_0_OPER_OFFSET) |
 183                          (BYTEWISE_64BYTE << ASO_CSEG_DATA_MASK_MODE_OFFSET));
 184                 wqe->general_cseg.flags = RTE_BE32(MLX5_COMP_ALWAYS <<
 185                                                          MLX5_COMP_MODE_OFFSET);
 186         }
 187 }
 188
 189 /*
 190  * Initialize Send Queue used for ASO connection tracking.
 191  *
 192  * @param[in] sq
 193  *   ASO SQ to initialize.
 194  */
 195 static void
 196 mlx5_aso_ct_init_sq(struct mlx5_aso_sq *sq)
 197 {
 198         volatile struct mlx5_aso_wqe *restrict wqe;
 199         int i;
 200         int size = 1 << sq->log_desc_n;
 201         uint64_t addr;
 202
 203         /* All the next fields state should stay constant. */
 204         for (i = 0, wqe = &sq->sq_obj.aso_wqes[0]; i < size; ++i, ++wqe) {
 205                 wqe->general_cseg.sq_ds = rte_cpu_to_be_32((sq->sqn << 8) |
 206                                                           (sizeof(*wqe) >> 4));
 207                 /* One unique MR for the query data. */
 208                 wqe->aso_cseg.lkey = rte_cpu_to_be_32(sq->mr.lkey);
 209                 /* Magic number 64 represents the length of a ASO CT obj. */
 210                 addr = (uint64_t)((uintptr_t)sq->mr.addr + i * 64);
 211                 wqe->aso_cseg.va_h = rte_cpu_to_be_32((uint32_t)(addr >> 32));
 212                 wqe->aso_cseg.va_l_r = rte_cpu_to_be_32((uint32_t)addr | 1u);
 213                 /*
 214                  * The values of operand_masks are different for modify
 215                  * and query.
 216                  * And data_mask may be different for each modification. In
 217                  * query, it could be zero and ignored.
 218                  * CQE generation is always needed, in order to decide when
 219                  * it is available to create the flow or read the data.
 220                  */
 221                 wqe->general_cseg.flags = RTE_BE32(MLX5_COMP_ALWAYS <<
 222                                                    MLX5_COMP_MODE_OFFSET);
 223         }
 224 }
 225
 226 /**
 227  * Create Send Queue used for ASO access.
 228  *
 229  * @param[in] ctx
 230  *   Context returned from mlx5 open_device() glue function.
 231  * @param[in/out] sq
 232  *   Pointer to SQ to create.
 233  * @param[in] socket
 234  *   Socket to use for allocation.
 235  * @param[in] uar
 236  *   User Access Region object.
 237  * @param[in] pdn
 238  *   Protection Domain number to use.
 239  * @param[in] log_desc_n
 240  *   Log of number of descriptors in queue.
 241  * @param[in] ts_format
 242  *   timestamp format supported by the queue.
 243  *
 244  * @return
 245  *   0 on success, a negative errno value otherwise and rte_errno is set.
 246  */
 247 static int
 248 mlx5_aso_sq_create(void *ctx, struct mlx5_aso_sq *sq, int socket, void *uar,
 249                    uint32_t pdn, uint16_t log_desc_n, uint32_t ts_format)
 250 {
 251         struct mlx5_devx_create_sq_attr attr = {
 252                 .user_index = 0xFFFF,
 253                 .wq_attr = (struct mlx5_devx_wq_attr){
 254                         .pd = pdn,
 255                         .uar_page = mlx5_os_get_devx_uar_page_id(uar),
 256                 },
 257                 .ts_format = mlx5_ts_format_conv(ts_format),
 258         };
 259         struct mlx5_devx_modify_sq_attr modify_attr = {
 260                 .state = MLX5_SQC_STATE_RDY,
 261         };
 262         uint16_t log_wqbb_n;
 263         int ret;
 264
 265         if (mlx5_aso_cq_create(ctx, &sq->cq, log_desc_n, socket,
 266                                mlx5_os_get_devx_uar_page_id(uar)))
 267                 goto error;
 268         sq->log_desc_n = log_desc_n;
 269         attr.cqn = sq->cq.cq_obj.cq->id;
 270         /* for mlx5_aso_wqe that is twice the size of mlx5_wqe */
 271         log_wqbb_n = log_desc_n + 1;
 272         ret = mlx5_devx_sq_create(ctx, &sq->sq_obj, log_wqbb_n, &attr, socket);
 273         if (ret) {
 274                 DRV_LOG(ERR, "Can't create SQ object.");
 275                 rte_errno = ENOMEM;
 276                 goto error;
 277         }
 278         ret = mlx5_devx_cmd_modify_sq(sq->sq_obj.sq, &modify_attr);
 279         if (ret) {
 280                 DRV_LOG(ERR, "Can't change SQ state to ready.");
 281                 rte_errno = ENOMEM;
 282                 goto error;
 283         }
 284         sq->pi = 0;
 285         sq->head = 0;
 286         sq->tail = 0;
 287         sq->sqn = sq->sq_obj.sq->id;
 288         sq->uar_addr = mlx5_os_get_devx_uar_reg_addr(uar);
 289         rte_spinlock_init(&sq->sqsl);
 290         return 0;
 291 error:
 292         mlx5_aso_destroy_sq(sq);
 293         return -1;
 294 }
 295
 296 /**
 297  * API to create and initialize Send Queue used for ASO access.
 298  *
 299  * @param[in] sh
 300  *   Pointer to shared device context.
 301  * @param[in] aso_opc_mod
 302  *   Mode of ASO feature.
 303  *
 304  * @return
 305  *   0 on success, a negative errno value otherwise and rte_errno is set.
 306  */
 307 int
 308 mlx5_aso_queue_init(struct mlx5_dev_ctx_shared *sh,
 309                     enum mlx5_access_aso_opc_mod aso_opc_mod)
 310 {
 311         uint32_t sq_desc_n = 1 << MLX5_ASO_QUEUE_LOG_DESC;
 312
 313         switch (aso_opc_mod) {
 314         case ASO_OPC_MOD_FLOW_HIT:
 315                 if (mlx5_aso_reg_mr(sh, (MLX5_ASO_AGE_ACTIONS_PER_POOL / 8) *
 316                                     sq_desc_n, &sh->aso_age_mng->aso_sq.mr, 0))
 317                         return -1;
 318                 if (mlx5_aso_sq_create(sh->ctx, &sh->aso_age_mng->aso_sq, 0,
 319                                   sh->tx_uar, sh->pdn, MLX5_ASO_QUEUE_LOG_DESC,
 320                                   sh->sq_ts_format)) {
 321                         mlx5_aso_dereg_mr(sh, &sh->aso_age_mng->aso_sq.mr);
 322                         return -1;
 323                 }
 324                 mlx5_aso_age_init_sq(&sh->aso_age_mng->aso_sq);
 325                 break;
 326         case ASO_OPC_MOD_POLICER:
 327                 if (mlx5_aso_sq_create(sh->ctx, &sh->mtrmng->pools_mng.sq, 0,
 328                                   sh->tx_uar, sh->pdn, MLX5_ASO_QUEUE_LOG_DESC,
 329                                   sh->sq_ts_format))
 330                         return -1;
 331                 mlx5_aso_mtr_init_sq(&sh->mtrmng->pools_mng.sq);
 332                 break;
 333         case ASO_OPC_MOD_CONNECTION_TRACKING:
 334                 /* 64B per object for query. */
 335                 if (mlx5_aso_reg_mr(sh, 64 * sq_desc_n,
 336                                     &sh->ct_mng->aso_sq.mr, 0))
 337                         return -1;
 338                 if (mlx5_aso_sq_create(sh->ctx, &sh->ct_mng->aso_sq, 0,
 339                                 sh->tx_uar, sh->pdn, MLX5_ASO_QUEUE_LOG_DESC,
 340                                 sh->sq_ts_format)) {
 341                         mlx5_aso_dereg_mr(sh, &sh->ct_mng->aso_sq.mr);
 342                         return -1;
 343                 }
 344                 mlx5_aso_ct_init_sq(&sh->ct_mng->aso_sq);
 345                 break;
 346         default:
 347                 DRV_LOG(ERR, "Unknown ASO operation mode");
 348                 return -1;
 349         }
 350         return 0;
 351 }
 352
 353 /**
 354  * API to destroy Send Queue used for ASO access.
 355  *
 356  * @param[in] sh
 357  *   Pointer to shared device context.
 358  * @param[in] aso_opc_mod
 359  *   Mode of ASO feature.
 360  */
 361 void
 362 mlx5_aso_queue_uninit(struct mlx5_dev_ctx_shared *sh,
 363                       enum mlx5_access_aso_opc_mod aso_opc_mod)
 364 {
 365         struct mlx5_aso_sq *sq;
 366
 367         switch (aso_opc_mod) {
 368         case ASO_OPC_MOD_FLOW_HIT:
 369                 mlx5_aso_dereg_mr(sh, &sh->aso_age_mng->aso_sq.mr);
 370                 sq = &sh->aso_age_mng->aso_sq;
 371                 break;
 372         case ASO_OPC_MOD_POLICER:
 373                 sq = &sh->mtrmng->pools_mng.sq;
 374                 break;
 375         case ASO_OPC_MOD_CONNECTION_TRACKING:
 376                 mlx5_aso_dereg_mr(sh, &sh->ct_mng->aso_sq.mr);
 377                 sq = &sh->ct_mng->aso_sq;
 378                 break;
 379         default:
 380                 DRV_LOG(ERR, "Unknown ASO operation mode");
 381                 return;
 382         }
 383         mlx5_aso_destroy_sq(sq);
 384 }
 385
 386 /**
 387  * Write a burst of WQEs to ASO SQ.
 388  *
 389  * @param[in] mng
 390  *   ASO management data, contains the SQ.
 391  * @param[in] n
 392  *   Index of the last valid pool.
 393  *
 394  * @return
 395  *   Number of WQEs in burst.
 396  */
 397 static uint16_t
 398 mlx5_aso_sq_enqueue_burst(struct mlx5_aso_age_mng *mng, uint16_t n)
 399 {
 400         volatile struct mlx5_aso_wqe *wqe;
 401         struct mlx5_aso_sq *sq = &mng->aso_sq;
 402         struct mlx5_aso_age_pool *pool;
 403         uint16_t size = 1 << sq->log_desc_n;
 404         uint16_t mask = size - 1;
 405         uint16_t max;
 406         uint16_t start_head = sq->head;
 407
 408         max = RTE_MIN(size - (uint16_t)(sq->head - sq->tail), n - sq->next);
 409         if (unlikely(!max))
 410                 return 0;
 411         sq->elts[start_head & mask].burst_size = max;
 412         do {
 413                 wqe = &sq->sq_obj.aso_wqes[sq->head & mask];
 414                 rte_prefetch0(&sq->sq_obj.aso_wqes[(sq->head + 1) & mask]);
 415                 /* Fill next WQE. */
 416                 rte_spinlock_lock(&mng->resize_sl);
 417                 pool = mng->pools[sq->next];
 418                 rte_spinlock_unlock(&mng->resize_sl);
 419                 sq->elts[sq->head & mask].pool = pool;
 420                 wqe->general_cseg.misc =
 421                                 rte_cpu_to_be_32(((struct mlx5_devx_obj *)
 422                                                  (pool->flow_hit_aso_obj))->id);
 423                 wqe->general_cseg.flags = RTE_BE32(MLX5_COMP_ONLY_FIRST_ERR <<
 424                                                          MLX5_COMP_MODE_OFFSET);
 425                 wqe->general_cseg.opcode = rte_cpu_to_be_32
 426                                                 (MLX5_OPCODE_ACCESS_ASO |
 427                                                  (ASO_OPC_MOD_FLOW_HIT <<
 428                                                   WQE_CSEG_OPC_MOD_OFFSET) |
 429                                                  (sq->pi <<
 430                                                   WQE_CSEG_WQE_INDEX_OFFSET));
 431                 sq->pi += 2; /* Each WQE contains 2 WQEBB's. */
 432                 sq->head++;
 433                 sq->next++;
 434                 max--;
 435         } while (max);
 436         wqe->general_cseg.flags = RTE_BE32(MLX5_COMP_ALWAYS <<
 437                                                          MLX5_COMP_MODE_OFFSET);
 438         rte_io_wmb();
 439         sq->sq_obj.db_rec[MLX5_SND_DBR] = rte_cpu_to_be_32(sq->pi);
 440         rte_wmb();
 441         *sq->uar_addr = *(volatile uint64_t *)wqe; /* Assume 64 bit ARCH.*/
 442         rte_wmb();
 443         return sq->elts[start_head & mask].burst_size;
 444 }
 445
 446 /**
 447  * Debug utility function. Dump contents of error CQE and WQE.
 448  *
 449  * @param[in] cqe
 450  *   Error CQE to dump.
 451  * @param[in] wqe
 452  *   Error WQE to dump.
 453  */
 454 static void
 455 mlx5_aso_dump_err_objs(volatile uint32_t *cqe, volatile uint32_t *wqe)
 456 {
 457         int i;
 458
 459         DRV_LOG(ERR, "Error cqe:");
 460         for (i = 0; i < 16; i += 4)
 461                 DRV_LOG(ERR, "%08X %08X %08X %08X", cqe[i], cqe[i + 1],
 462                         cqe[i + 2], cqe[i + 3]);
 463         DRV_LOG(ERR, "\nError wqe:");
 464         for (i = 0; i < (int)sizeof(struct mlx5_aso_wqe) / 4; i += 4)
 465                 DRV_LOG(ERR, "%08X %08X %08X %08X", wqe[i], wqe[i + 1],
 466                         wqe[i + 2], wqe[i + 3]);
 467 }
 468
 469 /**
 470  * Handle case of error CQE.
 471  *
 472  * @param[in] sq
 473  *   ASO SQ to use.
 474  */
 475 static void
 476 mlx5_aso_cqe_err_handle(struct mlx5_aso_sq *sq)
 477 {
 478         struct mlx5_aso_cq *cq = &sq->cq;
 479         uint32_t idx = cq->cq_ci & ((1 << cq->log_desc_n) - 1);
 480         volatile struct mlx5_err_cqe *cqe =
 481                         (volatile struct mlx5_err_cqe *)&cq->cq_obj.cqes[idx];
 482
 483         cq->errors++;
 484         idx = rte_be_to_cpu_16(cqe->wqe_counter) & (1u << sq->log_desc_n);
 485         mlx5_aso_dump_err_objs((volatile uint32_t *)cqe,
 486                                (volatile uint32_t *)&sq->sq_obj.aso_wqes[idx]);
 487 }
 488
 489 /**
 490  * Update ASO objects upon completion.
 491  *
 492  * @param[in] sh
 493  *   Shared device context.
 494  * @param[in] n
 495  *   Number of completed ASO objects.
 496  */
 497 static void
 498 mlx5_aso_age_action_update(struct mlx5_dev_ctx_shared *sh, uint16_t n)
 499 {
 500         struct mlx5_aso_age_mng *mng = sh->aso_age_mng;
 501         struct mlx5_aso_sq *sq = &mng->aso_sq;
 502         struct mlx5_age_info *age_info;
 503         const uint16_t size = 1 << sq->log_desc_n;
 504         const uint16_t mask = size - 1;
 505         const uint64_t curr = MLX5_CURR_TIME_SEC;
 506         uint16_t expected = AGE_CANDIDATE;
 507         uint16_t i;
 508
 509         for (i = 0; i < n; ++i) {
 510                 uint16_t idx = (sq->tail + i) & mask;
 511                 struct mlx5_aso_age_pool *pool = sq->elts[idx].pool;
 512                 uint64_t diff = curr - pool->time_of_last_age_check;
 513                 uint64_t *addr = sq->mr.addr;
 514                 int j;
 515
 516                 addr += idx * MLX5_ASO_AGE_ACTIONS_PER_POOL / 64;
 517                 pool->time_of_last_age_check = curr;
 518                 for (j = 0; j < MLX5_ASO_AGE_ACTIONS_PER_POOL; j++) {
 519                         struct mlx5_aso_age_action *act = &pool->actions[j];
 520                         struct mlx5_age_param *ap = &act->age_params;
 521                         uint8_t byte;
 522                         uint8_t offset;
 523                         uint8_t *u8addr;
 524                         uint8_t hit;
 525
 526                         if (__atomic_load_n(&ap->state, __ATOMIC_RELAXED) !=
 527                                             AGE_CANDIDATE)
 528                                 continue;
 529                         byte = 63 - (j / 8);
 530                         offset = j % 8;
 531                         u8addr = (uint8_t *)addr;
 532                         hit = (u8addr[byte] >> offset) & 0x1;
 533                         if (hit) {
 534                                 __atomic_store_n(&ap->sec_since_last_hit, 0,
 535                                                  __ATOMIC_RELAXED);
 536                         } else {
 537                                 struct mlx5_priv *priv;
 538
 539                                 __atomic_fetch_add(&ap->sec_since_last_hit,
 540                                                    diff, __ATOMIC_RELAXED);
 541                                 /* If timeout passed add to aged-out list. */
 542                                 if (ap->sec_since_last_hit <= ap->timeout)
 543                                         continue;
 544                                 priv =
 545                                 rte_eth_devices[ap->port_id].data->dev_private;
 546                                 age_info = GET_PORT_AGE_INFO(priv);
 547                                 rte_spinlock_lock(&age_info->aged_sl);
 548                                 if (__atomic_compare_exchange_n(&ap->state,
 549                                                                 &expected,
 550                                                                 AGE_TMOUT,
 551                                                                 false,
 552                                                                __ATOMIC_RELAXED,
 553                                                             __ATOMIC_RELAXED)) {
 554                                         LIST_INSERT_HEAD(&age_info->aged_aso,
 555                                                          act, next);
 556                                         MLX5_AGE_SET(age_info,
 557                                                      MLX5_AGE_EVENT_NEW);
 558                                 }
 559                                 rte_spinlock_unlock(&age_info->aged_sl);
 560                         }
 561                 }
 562         }
 563         mlx5_age_event_prepare(sh);
 564 }
 565
 566 /**
 567  * Handle completions from WQEs sent to ASO SQ.
 568  *
 569  * @param[in] sh
 570  *   Shared device context.
 571  *
 572  * @return
 573  *   Number of CQEs handled.
 574  */
 575 static uint16_t
 576 mlx5_aso_completion_handle(struct mlx5_dev_ctx_shared *sh)
 577 {
 578         struct mlx5_aso_age_mng *mng = sh->aso_age_mng;
 579         struct mlx5_aso_sq *sq = &mng->aso_sq;
 580         struct mlx5_aso_cq *cq = &sq->cq;
 581         volatile struct mlx5_cqe *restrict cqe;
 582         const unsigned int cq_size = 1 << cq->log_desc_n;
 583         const unsigned int mask = cq_size - 1;
 584         uint32_t idx;
 585         uint32_t next_idx = cq->cq_ci & mask;
 586         const uint16_t max = (uint16_t)(sq->head - sq->tail);
 587         uint16_t i = 0;
 588         int ret;
 589         if (unlikely(!max))
 590                 return 0;
 591         do {
 592                 idx = next_idx;
 593                 next_idx = (cq->cq_ci + 1) & mask;
 594                 rte_prefetch0(&cq->cq_obj.cqes[next_idx]);
 595                 cqe = &cq->cq_obj.cqes[idx];
 596                 ret = check_cqe(cqe, cq_size, cq->cq_ci);
 597                 /*
 598                  * Be sure owner read is done before any other cookie field or
 599                  * opaque field.
 600                  */
 601                 rte_io_rmb();
 602                 if (unlikely(ret != MLX5_CQE_STATUS_SW_OWN)) {
 603                         if (likely(ret == MLX5_CQE_STATUS_HW_OWN))
 604                                 break;
 605                         mlx5_aso_cqe_err_handle(sq);
 606                 } else {
 607                         i += sq->elts[(sq->tail + i) & mask].burst_size;
 608                 }
 609                 cq->cq_ci++;
 610         } while (1);
 611         if (likely(i)) {
 612                 mlx5_aso_age_action_update(sh, i);
 613                 sq->tail += i;
 614                 rte_io_wmb();
 615                 cq->cq_obj.db_rec[0] = rte_cpu_to_be_32(cq->cq_ci);
 616         }
 617         return i;
 618 }
 619
 620 /**
 621  * Periodically read CQEs and send WQEs to ASO SQ.
 622  *
 623  * @param[in] arg
 624  *   Shared device context containing the ASO SQ.
 625  */
 626 static void
 627 mlx5_flow_aso_alarm(void *arg)
 628 {
 629         struct mlx5_dev_ctx_shared *sh = arg;
 630         struct mlx5_aso_sq *sq = &sh->aso_age_mng->aso_sq;
 631         uint32_t us = 100u;
 632         uint16_t n;
 633
 634         rte_spinlock_lock(&sh->aso_age_mng->resize_sl);
 635         n = sh->aso_age_mng->next;
 636         rte_spinlock_unlock(&sh->aso_age_mng->resize_sl);
 637         mlx5_aso_completion_handle(sh);
 638         if (sq->next == n) {
 639                 /* End of loop: wait 1 second. */
 640                 us = US_PER_S;
 641                 sq->next = 0;
 642         }
 643         mlx5_aso_sq_enqueue_burst(sh->aso_age_mng, n);
 644         if (rte_eal_alarm_set(us, mlx5_flow_aso_alarm, sh))
 645                 DRV_LOG(ERR, "Cannot reinitialize aso alarm.");
 646 }
 647
 648 /**
 649  * API to start ASO access using ASO SQ.
 650  *
 651  * @param[in] sh
 652  *   Pointer to shared device context.
 653  *
 654  * @return
 655  *   0 on success, a negative errno value otherwise and rte_errno is set.
 656  */
 657 int
 658 mlx5_aso_flow_hit_queue_poll_start(struct mlx5_dev_ctx_shared *sh)
 659 {
 660         if (rte_eal_alarm_set(US_PER_S, mlx5_flow_aso_alarm, sh)) {
 661                 DRV_LOG(ERR, "Cannot reinitialize ASO age alarm.");
 662                 return -rte_errno;
 663         }
 664         return 0;
 665 }
 666
 667 /**
 668  * API to stop ASO access using ASO SQ.
 669  *
 670  * @param[in] sh
 671  *   Pointer to shared device context.
 672  *
 673  * @return
 674  *   0 on success, a negative errno value otherwise and rte_errno is set.
 675  */
 676 int
 677 mlx5_aso_flow_hit_queue_poll_stop(struct mlx5_dev_ctx_shared *sh)
 678 {
 679         int retries = 1024;
 680
 681         if (!sh->aso_age_mng->aso_sq.sq_obj.sq)
 682                 return -EINVAL;
 683         rte_errno = 0;
 684         while (--retries) {
 685                 rte_eal_alarm_cancel(mlx5_flow_aso_alarm, sh);
 686                 if (rte_errno != EINPROGRESS)
 687                         break;
 688                 rte_pause();
 689         }
 690         return -rte_errno;
 691 }
 692
 693 static uint16_t
 694 mlx5_aso_mtr_sq_enqueue_single(struct mlx5_aso_sq *sq,
 695                 struct mlx5_aso_mtr *aso_mtr)
 696 {
 697         volatile struct mlx5_aso_wqe *wqe = NULL;
 698         struct mlx5_flow_meter_info *fm = NULL;
 699         struct mlx5_flow_meter_profile *fmp;
 700         uint16_t size = 1 << sq->log_desc_n;
 701         uint16_t mask = size - 1;
 702         uint16_t res;
 703         uint32_t dseg_idx = 0;
 704         struct mlx5_aso_mtr_pool *pool = NULL;
 705
 706         rte_spinlock_lock(&sq->sqsl);
 707         res = size - (uint16_t)(sq->head - sq->tail);
 708         if (unlikely(!res)) {
 709                 DRV_LOG(ERR, "Fail: SQ is full and no free WQE to send");
 710                 rte_spinlock_unlock(&sq->sqsl);
 711                 return 0;
 712         }
 713         wqe = &sq->sq_obj.aso_wqes[sq->head & mask];
 714         rte_prefetch0(&sq->sq_obj.aso_wqes[(sq->head + 1) & mask]);
 715         /* Fill next WQE. */
 716         fm = &aso_mtr->fm;
 717         sq->elts[sq->head & mask].mtr = aso_mtr;
 718         pool = container_of(aso_mtr, struct mlx5_aso_mtr_pool,
 719                         mtrs[aso_mtr->offset]);
 720         wqe->general_cseg.misc = rte_cpu_to_be_32(pool->devx_obj->id +
 721                         (aso_mtr->offset >> 1));
 722         wqe->general_cseg.opcode = rte_cpu_to_be_32(MLX5_OPCODE_ACCESS_ASO |
 723                         (ASO_OPC_MOD_POLICER <<
 724                         WQE_CSEG_OPC_MOD_OFFSET) |
 725                         sq->pi << WQE_CSEG_WQE_INDEX_OFFSET);
 726         /* There are 2 meters in one ASO cache line. */
 727         dseg_idx = aso_mtr->offset & 0x1;
 728         wqe->aso_cseg.data_mask =
 729                 RTE_BE64(MLX5_IFC_FLOW_METER_PARAM_MASK << (32 * !dseg_idx));
 730         if (fm->is_enable) {
 731                 wqe->aso_dseg.mtrs[dseg_idx].cbs_cir =
 732                         fm->profile->srtcm_prm.cbs_cir;
 733                 wqe->aso_dseg.mtrs[dseg_idx].ebs_eir =
 734                         fm->profile->srtcm_prm.ebs_eir;
 735         } else {
 736                 wqe->aso_dseg.mtrs[dseg_idx].cbs_cir =
 737                         RTE_BE32(MLX5_IFC_FLOW_METER_DISABLE_CBS_CIR_VAL);
 738                 wqe->aso_dseg.mtrs[dseg_idx].ebs_eir = 0;
 739         }
 740         fmp = fm->profile;
 741         if (fmp->profile.packet_mode)
 742                 wqe->aso_dseg.mtrs[dseg_idx].v_bo_sc_bbog_mm =
 743                                 RTE_BE32((1 << ASO_DSEG_VALID_OFFSET) |
 744                                 (MLX5_FLOW_COLOR_GREEN << ASO_DSEG_SC_OFFSET) |
 745                                 (MLX5_METER_MODE_PKT << ASO_DSEG_MTR_MODE));
 746         else
 747                 wqe->aso_dseg.mtrs[dseg_idx].v_bo_sc_bbog_mm =
 748                                 RTE_BE32((1 << ASO_DSEG_VALID_OFFSET) |
 749                                 (MLX5_FLOW_COLOR_GREEN << ASO_DSEG_SC_OFFSET));
 750         switch (fmp->profile.alg) {
 751         case RTE_MTR_SRTCM_RFC2697:
 752                 /* Only needed for RFC2697. */
 753                 if (fm->profile->srtcm_prm.ebs_eir)
 754                         wqe->aso_dseg.mtrs[dseg_idx].v_bo_sc_bbog_mm |=
 755                                         RTE_BE32(1 << ASO_DSEG_BO_OFFSET);
 756                 break;
 757         case RTE_MTR_TRTCM_RFC2698:
 758                 wqe->aso_dseg.mtrs[dseg_idx].v_bo_sc_bbog_mm |=
 759                                 RTE_BE32(1 << ASO_DSEG_BBOG_OFFSET);
 760                 break;
 761         case RTE_MTR_TRTCM_RFC4115:
 762         default:
 763                 break;
 764         }
 765         /*
 766          * Note:
 767          * Due to software performance reason, the token fields will not be
 768          * set when posting the WQE to ASO SQ. It will be filled by the HW
 769          * automatically.
 770          */
 771         sq->head++;
 772         sq->pi += 2;/* Each WQE contains 2 WQEBB's. */
 773         rte_io_wmb();
 774         sq->sq_obj.db_rec[MLX5_SND_DBR] = rte_cpu_to_be_32(sq->pi);
 775         rte_wmb();
 776         *sq->uar_addr = *(volatile uint64_t *)wqe; /* Assume 64 bit ARCH. */
 777         rte_wmb();
 778         rte_spinlock_unlock(&sq->sqsl);
 779         return 1;
 780 }
 781
 782 static void
 783 mlx5_aso_mtrs_status_update(struct mlx5_aso_sq *sq, uint16_t aso_mtrs_nums)
 784 {
 785         uint16_t size = 1 << sq->log_desc_n;
 786         uint16_t mask = size - 1;
 787         uint16_t i;
 788         struct mlx5_aso_mtr *aso_mtr = NULL;
 789         uint8_t exp_state = ASO_METER_WAIT;
 790
 791         for (i = 0; i < aso_mtrs_nums; ++i) {
 792                 aso_mtr = sq->elts[(sq->tail + i) & mask].mtr;
 793                 MLX5_ASSERT(aso_mtr);
 794                 (void)__atomic_compare_exchange_n(&aso_mtr->state,
 795                                 &exp_state, ASO_METER_READY,
 796                                 false, __ATOMIC_RELAXED, __ATOMIC_RELAXED);
 797         }
 798 }
 799
 800 static void
 801 mlx5_aso_mtr_completion_handle(struct mlx5_aso_sq *sq)
 802 {
 803         struct mlx5_aso_cq *cq = &sq->cq;
 804         volatile struct mlx5_cqe *restrict cqe;
 805         const unsigned int cq_size = 1 << cq->log_desc_n;
 806         const unsigned int mask = cq_size - 1;
 807         uint32_t idx;
 808         uint32_t next_idx = cq->cq_ci & mask;
 809         uint16_t max;
 810         uint16_t n = 0;
 811         int ret;
 812
 813         rte_spinlock_lock(&sq->sqsl);
 814         max = (uint16_t)(sq->head - sq->tail);
 815         if (unlikely(!max)) {
 816                 rte_spinlock_unlock(&sq->sqsl);
 817                 return;
 818         }
 819         do {
 820                 idx = next_idx;
 821                 next_idx = (cq->cq_ci + 1) & mask;
 822                 rte_prefetch0(&cq->cq_obj.cqes[next_idx]);
 823                 cqe = &cq->cq_obj.cqes[idx];
 824                 ret = check_cqe(cqe, cq_size, cq->cq_ci);
 825                 /*
 826                  * Be sure owner read is done before any other cookie field or
 827                  * opaque field.
 828                  */
 829                 rte_io_rmb();
 830                 if (ret != MLX5_CQE_STATUS_SW_OWN) {
 831                         if (likely(ret == MLX5_CQE_STATUS_HW_OWN))
 832                                 break;
 833                         mlx5_aso_cqe_err_handle(sq);
 834                 } else {
 835                         n++;
 836                 }
 837                 cq->cq_ci++;
 838         } while (1);
 839         if (likely(n)) {
 840                 mlx5_aso_mtrs_status_update(sq, n);
 841                 sq->tail += n;
 842                 rte_io_wmb();
 843                 cq->cq_obj.db_rec[0] = rte_cpu_to_be_32(cq->cq_ci);
 844         }
 845         rte_spinlock_unlock(&sq->sqsl);
 846 }
 847
 848 /**
 849  * Update meter parameter by send WQE.
 850  *
 851  * @param[in] dev
 852  *   Pointer to Ethernet device.
 853  * @param[in] priv
 854  *   Pointer to mlx5 private data structure.
 855  * @param[in] fm
 856  *   Pointer to flow meter to be modified.
 857  *
 858  * @return
 859  *   0 on success, a negative errno value otherwise and rte_errno is set.
 860  */
 861 int
 862 mlx5_aso_meter_update_by_wqe(struct mlx5_dev_ctx_shared *sh,
 863                         struct mlx5_aso_mtr *mtr)
 864 {
 865         struct mlx5_aso_sq *sq = &sh->mtrmng->pools_mng.sq;
 866         uint32_t poll_wqe_times = MLX5_MTR_POLL_WQE_CQE_TIMES;
 867
 868         do {
 869                 mlx5_aso_mtr_completion_handle(sq);
 870                 if (mlx5_aso_mtr_sq_enqueue_single(sq, mtr))
 871                         return 0;
 872                 /* Waiting for wqe resource. */
 873                 rte_delay_us_sleep(MLX5_ASO_WQE_CQE_RESPONSE_DELAY);
 874         } while (--poll_wqe_times);
 875         DRV_LOG(ERR, "Fail to send WQE for ASO meter offset %d",
 876                         mtr->offset);
 877         return -1;
 878 }
 879
 880 /**
 881  * Wait for meter to be ready.
 882  *
 883  * @param[in] dev
 884  *   Pointer to Ethernet device.
 885  * @param[in] priv
 886  *   Pointer to mlx5 private data structure.
 887  * @param[in] fm
 888  *   Pointer to flow meter to be modified.
 889  *
 890  * @return
 891  *   0 on success, a negative errno value otherwise and rte_errno is set.
 892  */
 893 int
 894 mlx5_aso_mtr_wait(struct mlx5_dev_ctx_shared *sh,
 895                         struct mlx5_aso_mtr *mtr)
 896 {
 897         struct mlx5_aso_sq *sq = &sh->mtrmng->pools_mng.sq;
 898         uint32_t poll_cqe_times = MLX5_MTR_POLL_WQE_CQE_TIMES;
 899
 900         if (__atomic_load_n(&mtr->state, __ATOMIC_RELAXED) ==
 901                                             ASO_METER_READY)
 902                 return 0;
 903         do {
 904                 mlx5_aso_mtr_completion_handle(sq);
 905                 if (__atomic_load_n(&mtr->state, __ATOMIC_RELAXED) ==
 906                                             ASO_METER_READY)
 907                         return 0;
 908                 /* Waiting for CQE ready. */
 909                 rte_delay_us_sleep(MLX5_ASO_WQE_CQE_RESPONSE_DELAY);
 910         } while (--poll_cqe_times);
 911         DRV_LOG(ERR, "Fail to poll CQE ready for ASO meter offset %d",
 912                         mtr->offset);
 913         return -1;
 914 }
 915
 916 /*
 917  * Post a WQE to the ASO CT SQ to modify the context.
 918  *
 919  * @param[in] mng
 920  *   Pointer to the CT pools management structure.
 921  * @param[in] ct
 922  *   Pointer to the generic CT structure related to the context.
 923  * @param[in] profile
 924  *   Pointer to configuration profile.
 925  *
 926  * @return
 927  *   1 on success (WQE number), 0 on failure.
 928  */
 929 static uint16_t
 930 mlx5_aso_ct_sq_enqueue_single(struct mlx5_aso_ct_pools_mng *mng,
 931                               struct mlx5_aso_ct_action *ct,
 932                               const struct rte_flow_action_conntrack *profile)
 933 {
 934         volatile struct mlx5_aso_wqe *wqe = NULL;
 935         struct mlx5_aso_sq *sq = &mng->aso_sq;
 936         uint16_t size = 1 << sq->log_desc_n;
 937         uint16_t mask = size - 1;
 938         uint16_t res;
 939         struct mlx5_aso_ct_pool *pool;
 940         void *desg;
 941         void *orig_dir;
 942         void *reply_dir;
 943
 944         rte_spinlock_lock(&sq->sqsl);
 945         /* Prevent other threads to update the index. */
 946         res = size - (uint16_t)(sq->head - sq->tail);
 947         if (unlikely(!res)) {
 948                 rte_spinlock_unlock(&sq->sqsl);
 949                 DRV_LOG(ERR, "Fail: SQ is full and no free WQE to send");
 950                 return 0;
 951         }
 952         wqe = &sq->sq_obj.aso_wqes[sq->head & mask];
 953         rte_prefetch0(&sq->sq_obj.aso_wqes[(sq->head + 1) & mask]);
 954         /* Fill next WQE. */
 955         MLX5_ASO_CT_UPDATE_STATE(ct, ASO_CONNTRACK_WAIT);
 956         sq->elts[sq->head & mask].ct = ct;
 957         sq->elts[sq->head & mask].query_data = NULL;
 958         pool = container_of(ct, struct mlx5_aso_ct_pool, actions[ct->offset]);
 959         /* Each WQE will have a single CT object. */
 960         wqe->general_cseg.misc = rte_cpu_to_be_32(pool->devx_obj->id +
 961                                                   ct->offset);
 962         wqe->general_cseg.opcode = rte_cpu_to_be_32(MLX5_OPCODE_ACCESS_ASO |
 963                         (ASO_OPC_MOD_CONNECTION_TRACKING <<
 964                          WQE_CSEG_OPC_MOD_OFFSET) |
 965                         sq->pi << WQE_CSEG_WQE_INDEX_OFFSET);
 966         wqe->aso_cseg.operand_masks = rte_cpu_to_be_32
 967                         (0u |
 968                          (ASO_OPER_LOGICAL_OR << ASO_CSEG_COND_OPER_OFFSET) |
 969                          (ASO_OP_ALWAYS_TRUE << ASO_CSEG_COND_1_OPER_OFFSET) |
 970                          (ASO_OP_ALWAYS_TRUE << ASO_CSEG_COND_0_OPER_OFFSET) |
 971                          (BYTEWISE_64BYTE << ASO_CSEG_DATA_MASK_MODE_OFFSET));
 972         wqe->aso_cseg.data_mask = UINT64_MAX;
 973         /* To make compiler happy. */
 974         desg = (void *)(uintptr_t)wqe->aso_dseg.data;
 975         MLX5_SET(conn_track_aso, desg, valid, 1);
 976         MLX5_SET(conn_track_aso, desg, state, profile->state);
 977         MLX5_SET(conn_track_aso, desg, freeze_track, !profile->enable);
 978         MLX5_SET(conn_track_aso, desg, connection_assured,
 979                  profile->live_connection);
 980         MLX5_SET(conn_track_aso, desg, sack_permitted, profile->selective_ack);
 981         MLX5_SET(conn_track_aso, desg, challenged_acked,
 982                  profile->challenge_ack_passed);
 983         /* Heartbeat, retransmission_counter, retranmission_limit_exceeded: 0 */
 984         MLX5_SET(conn_track_aso, desg, heartbeat, 0);
 985         MLX5_SET(conn_track_aso, desg, max_ack_window,
 986                  profile->max_ack_window);
 987         MLX5_SET(conn_track_aso, desg, retransmission_counter, 0);
 988         MLX5_SET(conn_track_aso, desg, retranmission_limit_exceeded, 0);
 989         MLX5_SET(conn_track_aso, desg, retranmission_limit,
 990                  profile->retransmission_limit);
 991         MLX5_SET(conn_track_aso, desg, reply_direction_tcp_scale,
 992                  profile->reply_dir.scale);
 993         MLX5_SET(conn_track_aso, desg, reply_direction_tcp_close_initiated,
 994                  profile->reply_dir.close_initiated);
 995         /* Both directions will use the same liberal mode. */
 996         MLX5_SET(conn_track_aso, desg, reply_direction_tcp_liberal_enabled,
 997                  profile->liberal_mode);
 998         MLX5_SET(conn_track_aso, desg, reply_direction_tcp_data_unacked,
 999                  profile->reply_dir.data_unacked);
1000         MLX5_SET(conn_track_aso, desg, reply_direction_tcp_max_ack,
1001                  profile->reply_dir.last_ack_seen);
1002         MLX5_SET(conn_track_aso, desg, original_direction_tcp_scale,
1003                  profile->original_dir.scale);
1004         MLX5_SET(conn_track_aso, desg, original_direction_tcp_close_initiated,
1005                  profile->original_dir.close_initiated);
1006         MLX5_SET(conn_track_aso, desg, original_direction_tcp_liberal_enabled,
1007                  profile->liberal_mode);
1008         MLX5_SET(conn_track_aso, desg, original_direction_tcp_data_unacked,
1009                  profile->original_dir.data_unacked);
1010         MLX5_SET(conn_track_aso, desg, original_direction_tcp_max_ack,
1011                  profile->original_dir.last_ack_seen);
1012         MLX5_SET(conn_track_aso, desg, last_win, profile->last_window);
1013         MLX5_SET(conn_track_aso, desg, last_dir, profile->last_direction);
1014         MLX5_SET(conn_track_aso, desg, last_index, profile->last_index);
1015         MLX5_SET(conn_track_aso, desg, last_seq, profile->last_seq);
1016         MLX5_SET(conn_track_aso, desg, last_ack, profile->last_ack);
1017         MLX5_SET(conn_track_aso, desg, last_end, profile->last_end);
1018         orig_dir = MLX5_ADDR_OF(conn_track_aso, desg, original_dir);
1019         MLX5_SET(tcp_window_params, orig_dir, sent_end,
1020                  profile->original_dir.sent_end);
1021         MLX5_SET(tcp_window_params, orig_dir, reply_end,
1022                  profile->original_dir.reply_end);
1023         MLX5_SET(tcp_window_params, orig_dir, max_win,
1024                  profile->original_dir.max_win);
1025         MLX5_SET(tcp_window_params, orig_dir, max_ack,
1026                  profile->original_dir.max_ack);
1027         reply_dir = MLX5_ADDR_OF(conn_track_aso, desg, reply_dir);
1028         MLX5_SET(tcp_window_params, reply_dir, sent_end,
1029                  profile->reply_dir.sent_end);
1030         MLX5_SET(tcp_window_params, reply_dir, reply_end,
1031                  profile->reply_dir.reply_end);
1032         MLX5_SET(tcp_window_params, reply_dir, max_win,
1033                  profile->reply_dir.max_win);
1034         MLX5_SET(tcp_window_params, reply_dir, max_ack,
1035                  profile->reply_dir.max_ack);
1036         sq->head++;
1037         sq->pi += 2; /* Each WQE contains 2 WQEBB's. */
1038         rte_io_wmb();
1039         sq->sq_obj.db_rec[MLX5_SND_DBR] = rte_cpu_to_be_32(sq->pi);
1040         rte_wmb();
1041         *sq->uar_addr = *(volatile uint64_t *)wqe; /* Assume 64 bit ARCH. */
1042         rte_wmb();
1043         rte_spinlock_unlock(&sq->sqsl);
1044         return 1;
1045 }
1046
1047 /*
1048  * Update the status field of CTs to indicate ready to be used by flows.
1049  * A continuous number of CTs since last update.
1050  *
1051  * @param[in] sq
1052  *   Pointer to ASO CT SQ.
1053  * @param[in] num
1054  *   Number of CT structures to be updated.
1055  *
1056  * @return
1057  *   0 on success, a negative value.
1058  */
1059 static void
1060 mlx5_aso_ct_status_update(struct mlx5_aso_sq *sq, uint16_t num)
1061 {
1062         uint16_t size = 1 << sq->log_desc_n;
1063         uint16_t mask = size - 1;
1064         uint16_t i;
1065         struct mlx5_aso_ct_action *ct = NULL;
1066         uint16_t idx;
1067
1068         for (i = 0; i < num; i++) {
1069                 idx = (uint16_t)((sq->tail + i) & mask);
1070                 ct = sq->elts[idx].ct;
1071                 MLX5_ASSERT(ct);
1072                 MLX5_ASO_CT_UPDATE_STATE(ct, ASO_CONNTRACK_READY);
1073                 if (sq->elts[idx].query_data)
1074                         rte_memcpy(sq->elts[idx].query_data,
1075                                    (char *)((uintptr_t)sq->mr.addr + idx * 64),
1076                                    64);
1077         }
1078 }
1079
1080 /*
1081  * Post a WQE to the ASO CT SQ to query the current context.
1082  *
1083  * @param[in] mng
1084  *   Pointer to the CT pools management structure.
1085  * @param[in] ct
1086  *   Pointer to the generic CT structure related to the context.
1087  * @param[in] data
1088  *   Pointer to data area to be filled.
1089  *
1090  * @return
1091  *   1 on success (WQE number), 0 on failure.
1092  */
1093 static int
1094 mlx5_aso_ct_sq_query_single(struct mlx5_aso_ct_pools_mng *mng,
1095                             struct mlx5_aso_ct_action *ct, char *data)
1096 {
1097         volatile struct mlx5_aso_wqe *wqe = NULL;
1098         struct mlx5_aso_sq *sq = &mng->aso_sq;
1099         uint16_t size = 1 << sq->log_desc_n;
1100         uint16_t mask = size - 1;
1101         uint16_t res;
1102         uint16_t wqe_idx;
1103         struct mlx5_aso_ct_pool *pool;
1104         enum mlx5_aso_ct_state state =
1105                                 __atomic_load_n(&ct->state, __ATOMIC_RELAXED);
1106
1107         if (state == ASO_CONNTRACK_FREE) {
1108                 DRV_LOG(ERR, "Fail: No context to query");
1109                 return -1;
1110         } else if (state == ASO_CONNTRACK_WAIT) {
1111                 return 0;
1112         }
1113         rte_spinlock_lock(&sq->sqsl);
1114         res = size - (uint16_t)(sq->head - sq->tail);
1115         if (unlikely(!res)) {
1116                 rte_spinlock_unlock(&sq->sqsl);
1117                 DRV_LOG(ERR, "Fail: SQ is full and no free WQE to send");
1118                 return 0;
1119         }
1120         MLX5_ASO_CT_UPDATE_STATE(ct, ASO_CONNTRACK_QUERY);
1121         wqe = &sq->sq_obj.aso_wqes[sq->head & mask];
1122         /* Confirm the location and address of the prefetch instruction. */
1123         rte_prefetch0(&sq->sq_obj.aso_wqes[(sq->head + 1) & mask]);
1124         /* Fill next WQE. */
1125         wqe_idx = sq->head & mask;
1126         sq->elts[wqe_idx].ct = ct;
1127         sq->elts[wqe_idx].query_data = data;
1128         pool = container_of(ct, struct mlx5_aso_ct_pool, actions[ct->offset]);
1129         /* Each WQE will have a single CT object. */
1130         wqe->general_cseg.misc = rte_cpu_to_be_32(pool->devx_obj->id +
1131                                                   ct->offset);
1132         wqe->general_cseg.opcode = rte_cpu_to_be_32(MLX5_OPCODE_ACCESS_ASO |
1133                         (ASO_OPC_MOD_CONNECTION_TRACKING <<
1134                          WQE_CSEG_OPC_MOD_OFFSET) |
1135                         sq->pi << WQE_CSEG_WQE_INDEX_OFFSET);
1136         /*
1137          * There is no write request is required.
1138          * ASO_OPER_LOGICAL_AND and ASO_OP_ALWAYS_FALSE are both 0.
1139          * "BYTEWISE_64BYTE" is needed for a whole context.
1140          * Set to 0 directly to reduce an endian swap. (Modify should rewrite.)
1141          * "data_mask" is ignored.
1142          * Buffer address was already filled during initialization.
1143          */
1144         wqe->aso_cseg.operand_masks = rte_cpu_to_be_32(BYTEWISE_64BYTE <<
1145                                         ASO_CSEG_DATA_MASK_MODE_OFFSET);
1146         wqe->aso_cseg.data_mask = 0;
1147         sq->head++;
1148         /*
1149          * Each WQE contains 2 WQEBB's, even though
1150          * data segment is not used in this case.
1151          */
1152         sq->pi += 2;
1153         rte_io_wmb();
1154         sq->sq_obj.db_rec[MLX5_SND_DBR] = rte_cpu_to_be_32(sq->pi);
1155         rte_wmb();
1156         *sq->uar_addr = *(volatile uint64_t *)wqe; /* Assume 64 bit ARCH. */
1157         rte_wmb();
1158         rte_spinlock_unlock(&sq->sqsl);
1159         return 1;
1160 }
1161
1162 /*
1163  * Handle completions from WQEs sent to ASO CT.
1164  *
1165  * @param[in] mng
1166  *   Pointer to the CT pools management structure.
1167  */
1168 static void
1169 mlx5_aso_ct_completion_handle(struct mlx5_aso_ct_pools_mng *mng)
1170 {
1171         struct mlx5_aso_sq *sq = &mng->aso_sq;
1172         struct mlx5_aso_cq *cq = &sq->cq;
1173         volatile struct mlx5_cqe *restrict cqe;
1174         const uint32_t cq_size = 1 << cq->log_desc_n;
1175         const uint32_t mask = cq_size - 1;
1176         uint32_t idx;
1177         uint32_t next_idx;
1178         uint16_t max;
1179         uint16_t n = 0;
1180         int ret;
1181
1182         rte_spinlock_lock(&sq->sqsl);
1183         max = (uint16_t)(sq->head - sq->tail);
1184         if (unlikely(!max)) {
1185                 rte_spinlock_unlock(&sq->sqsl);
1186                 return;
1187         }
1188         next_idx = cq->cq_ci & mask;
1189         do {
1190                 idx = next_idx;
1191                 next_idx = (cq->cq_ci + 1) & mask;
1192                 /* Need to confirm the position of the prefetch. */
1193                 rte_prefetch0(&cq->cq_obj.cqes[next_idx]);
1194                 cqe = &cq->cq_obj.cqes[idx];
1195                 ret = check_cqe(cqe, cq_size, cq->cq_ci);
1196                 /*
1197                  * Be sure owner read is done before any other cookie field or
1198                  * opaque field.
1199                  */
1200                 rte_io_rmb();
1201                 if (unlikely(ret != MLX5_CQE_STATUS_SW_OWN)) {
1202                         if (likely(ret == MLX5_CQE_STATUS_HW_OWN))
1203                                 break;
1204                         mlx5_aso_cqe_err_handle(sq);
1205                 } else {
1206                         n++;
1207                 }
1208                 cq->cq_ci++;
1209         } while (1);
1210         if (likely(n)) {
1211                 mlx5_aso_ct_status_update(sq, n);
1212                 sq->tail += n;
1213                 rte_io_wmb();
1214                 cq->cq_obj.db_rec[0] = rte_cpu_to_be_32(cq->cq_ci);
1215         }
1216         rte_spinlock_unlock(&sq->sqsl);
1217 }
1218
1219 /*
1220  * Update connection tracking ASO context by sending WQE.
1221  *
1222  * @param[in] sh
1223  *   Pointer to mlx5_dev_ctx_shared object.
1224  * @param[in] ct
1225  *   Pointer to connection tracking offload object.
1226  * @param[in] profile
1227  *   Pointer to connection tracking TCP parameter.
1228  *
1229  * @return
1230  *   0 on success, -1 on failure.
1231  */
1232 int
1233 mlx5_aso_ct_update_by_wqe(struct mlx5_dev_ctx_shared *sh,
1234                           struct mlx5_aso_ct_action *ct,
1235                           const struct rte_flow_action_conntrack *profile)
1236 {
1237         struct mlx5_aso_ct_pools_mng *mng = sh->ct_mng;
1238         uint32_t poll_wqe_times = MLX5_CT_POLL_WQE_CQE_TIMES;
1239         struct mlx5_aso_ct_pool *pool;
1240
1241         MLX5_ASSERT(ct);
1242         do {
1243                 mlx5_aso_ct_completion_handle(mng);
1244                 if (mlx5_aso_ct_sq_enqueue_single(mng, ct, profile))
1245                         return 0;
1246                 /* Waiting for wqe resource. */
1247                 rte_delay_us_sleep(10u);
1248         } while (--poll_wqe_times);
1249         pool = container_of(ct, struct mlx5_aso_ct_pool, actions[ct->offset]);
1250         DRV_LOG(ERR, "Fail to send WQE for ASO CT %d in pool %d",
1251                 ct->offset, pool->index);
1252         return -1;
1253 }
1254
1255 /*
1256  * The routine is used to wait for WQE completion to continue with queried data.
1257  *
1258  * @param[in] sh
1259  *   Pointer to mlx5_dev_ctx_shared object.
1260  * @param[in] ct
1261  *   Pointer to connection tracking offload object.
1262  *
1263  * @return
1264  *   0 on success, -1 on failure.
1265  */
1266 int
1267 mlx5_aso_ct_wait_ready(struct mlx5_dev_ctx_shared *sh,
1268                        struct mlx5_aso_ct_action *ct)
1269 {
1270         struct mlx5_aso_ct_pools_mng *mng = sh->ct_mng;
1271         uint32_t poll_cqe_times = MLX5_CT_POLL_WQE_CQE_TIMES;
1272         struct mlx5_aso_ct_pool *pool;
1273
1274         if (__atomic_load_n(&ct->state, __ATOMIC_RELAXED) ==
1275             ASO_CONNTRACK_READY)
1276                 return 0;
1277         do {
1278                 mlx5_aso_ct_completion_handle(mng);
1279                 if (__atomic_load_n(&ct->state, __ATOMIC_RELAXED) ==
1280                     ASO_CONNTRACK_READY)
1281                         return 0;
1282                 /* Waiting for CQE ready, consider should block or sleep. */
1283                 rte_delay_us_sleep(MLX5_ASO_WQE_CQE_RESPONSE_DELAY);
1284         } while (--poll_cqe_times);
1285         pool = container_of(ct, struct mlx5_aso_ct_pool, actions[ct->offset]);
1286         DRV_LOG(ERR, "Fail to poll CQE for ASO CT %d in pool %d",
1287                 ct->offset, pool->index);
1288         return -1;
1289 }
1290
1291 /*
1292  * Convert the hardware conntrack data format into the profile.
1293  *
1294  * @param[in] profile
1295  *   Pointer to conntrack profile to be filled after query.
1296  * @param[in] wdata
1297  *   Pointer to data fetched from hardware.
1298  */
1299 static inline void
1300 mlx5_aso_ct_obj_analyze(struct rte_flow_action_conntrack *profile,
1301                         char *wdata)
1302 {
1303         void *o_dir = MLX5_ADDR_OF(conn_track_aso, wdata, original_dir);
1304         void *r_dir = MLX5_ADDR_OF(conn_track_aso, wdata, reply_dir);
1305
1306         /* MLX5_GET16 should be taken into consideration. */
1307         profile->state = (enum rte_flow_conntrack_state)
1308                          MLX5_GET(conn_track_aso, wdata, state);
1309         profile->enable = !MLX5_GET(conn_track_aso, wdata, freeze_track);
1310         profile->selective_ack = MLX5_GET(conn_track_aso, wdata,
1311                                           sack_permitted);
1312         profile->live_connection = MLX5_GET(conn_track_aso, wdata,
1313                                             connection_assured);
1314         profile->challenge_ack_passed = MLX5_GET(conn_track_aso, wdata,
1315                                                  challenged_acked);
1316         profile->max_ack_window = MLX5_GET(conn_track_aso, wdata,
1317                                            max_ack_window);
1318         profile->retransmission_limit = MLX5_GET(conn_track_aso, wdata,
1319                                                  retranmission_limit);
1320         profile->last_window = MLX5_GET(conn_track_aso, wdata, last_win);
1321         profile->last_direction = MLX5_GET(conn_track_aso, wdata, last_dir);
1322         profile->last_index = (enum rte_flow_conntrack_tcp_last_index)
1323                               MLX5_GET(conn_track_aso, wdata, last_index);
1324         profile->last_seq = MLX5_GET(conn_track_aso, wdata, last_seq);
1325         profile->last_ack = MLX5_GET(conn_track_aso, wdata, last_ack);
1326         profile->last_end = MLX5_GET(conn_track_aso, wdata, last_end);
1327         profile->liberal_mode = MLX5_GET(conn_track_aso, wdata,
1328                                 reply_direction_tcp_liberal_enabled) |
1329                                 MLX5_GET(conn_track_aso, wdata,
1330                                 original_direction_tcp_liberal_enabled);
1331         /* No liberal in the RTE structure profile. */
1332         profile->reply_dir.scale = MLX5_GET(conn_track_aso, wdata,
1333                                             reply_direction_tcp_scale);
1334         profile->reply_dir.close_initiated = MLX5_GET(conn_track_aso, wdata,
1335                                         reply_direction_tcp_close_initiated);
1336         profile->reply_dir.data_unacked = MLX5_GET(conn_track_aso, wdata,
1337                                         reply_direction_tcp_data_unacked);
1338         profile->reply_dir.last_ack_seen = MLX5_GET(conn_track_aso, wdata,
1339                                         reply_direction_tcp_max_ack);
1340         profile->reply_dir.sent_end = MLX5_GET(tcp_window_params,
1341                                                r_dir, sent_end);
1342         profile->reply_dir.reply_end = MLX5_GET(tcp_window_params,
1343                                                 r_dir, reply_end);
1344         profile->reply_dir.max_win = MLX5_GET(tcp_window_params,
1345                                               r_dir, max_win);
1346         profile->reply_dir.max_ack = MLX5_GET(tcp_window_params,
1347                                               r_dir, max_ack);
1348         profile->original_dir.scale = MLX5_GET(conn_track_aso, wdata,
1349                                                original_direction_tcp_scale);
1350         profile->original_dir.close_initiated = MLX5_GET(conn_track_aso, wdata,
1351                                         original_direction_tcp_close_initiated);
1352         profile->original_dir.data_unacked = MLX5_GET(conn_track_aso, wdata,
1353                                         original_direction_tcp_data_unacked);
1354         profile->original_dir.last_ack_seen = MLX5_GET(conn_track_aso, wdata,
1355                                         original_direction_tcp_max_ack);
1356         profile->original_dir.sent_end = MLX5_GET(tcp_window_params,
1357                                                   o_dir, sent_end);
1358         profile->original_dir.reply_end = MLX5_GET(tcp_window_params,
1359                                                    o_dir, reply_end);
1360         profile->original_dir.max_win = MLX5_GET(tcp_window_params,
1361                                                  o_dir, max_win);
1362         profile->original_dir.max_ack = MLX5_GET(tcp_window_params,
1363                                                  o_dir, max_ack);
1364 }
1365
1366 /*
1367  * Query connection tracking information parameter by send WQE.
1368  *
1369  * @param[in] dev
1370  *   Pointer to Ethernet device.
1371  * @param[in] ct
1372  *   Pointer to connection tracking offload object.
1373  * @param[out] profile
1374  *   Pointer to connection tracking TCP information.
1375  *
1376  * @return
1377  *   0 on success, -1 on failure.
1378  */
1379 int
1380 mlx5_aso_ct_query_by_wqe(struct mlx5_dev_ctx_shared *sh,
1381                          struct mlx5_aso_ct_action *ct,
1382                          struct rte_flow_action_conntrack *profile)
1383 {
1384         struct mlx5_aso_ct_pools_mng *mng = sh->ct_mng;
1385         uint32_t poll_wqe_times = MLX5_CT_POLL_WQE_CQE_TIMES;
1386         struct mlx5_aso_ct_pool *pool;
1387         char out_data[64 * 2];
1388         int ret;
1389
1390         MLX5_ASSERT(ct);
1391         do {
1392                 mlx5_aso_ct_completion_handle(mng);
1393                 ret = mlx5_aso_ct_sq_query_single(mng, ct, out_data);
1394                 if (ret < 0)
1395                         return ret;
1396                 else if (ret > 0)
1397                         goto data_handle;
1398                 /* Waiting for wqe resource or state. */
1399                 else
1400                         rte_delay_us_sleep(10u);
1401         } while (--poll_wqe_times);
1402         pool = container_of(ct, struct mlx5_aso_ct_pool, actions[ct->offset]);
1403         DRV_LOG(ERR, "Fail to send WQE for ASO CT %d in pool %d",
1404                 ct->offset, pool->index);
1405         return -1;
1406 data_handle:
1407         ret = mlx5_aso_ct_wait_ready(sh, ct);
1408         if (!ret)
1409                 mlx5_aso_ct_obj_analyze(profile, out_data);
1410         return ret;
1411 }
1412
1413 /*
1414  * Make sure the conntrack context is synchronized with hardware before
1415  * creating a flow rule that uses it.
1416  *
1417  * @param[in] sh
1418  *   Pointer to shared device context.
1419  * @param[in] ct
1420  *   Pointer to connection tracking offload object.
1421  *
1422  * @return
1423  *   0 on success, a negative errno value otherwise and rte_errno is set.
1424  */
1425 int
1426 mlx5_aso_ct_available(struct mlx5_dev_ctx_shared *sh,
1427                       struct mlx5_aso_ct_action *ct)
1428 {
1429         struct mlx5_aso_ct_pools_mng *mng = sh->ct_mng;
1430         uint32_t poll_cqe_times = MLX5_CT_POLL_WQE_CQE_TIMES;
1431         enum mlx5_aso_ct_state state =
1432                                 __atomic_load_n(&ct->state, __ATOMIC_RELAXED);
1433
1434         if (state == ASO_CONNTRACK_FREE) {
1435                 rte_errno = ENXIO;
1436                 return -rte_errno;
1437         } else if (state == ASO_CONNTRACK_READY ||
1438                    state == ASO_CONNTRACK_QUERY) {
1439                 return 0;
1440         }
1441         do {
1442                 mlx5_aso_ct_completion_handle(mng);
1443                 state = __atomic_load_n(&ct->state, __ATOMIC_RELAXED);
1444                 if (state == ASO_CONNTRACK_READY ||
1445                     state == ASO_CONNTRACK_QUERY)
1446                         return 0;
1447                 /* Waiting for CQE ready, consider should block or sleep. */
1448                 rte_delay_us_sleep(MLX5_ASO_WQE_CQE_RESPONSE_DELAY);
1449         } while (--poll_cqe_times);
1450         rte_errno = EBUSY;
1451         return -rte_errno;
1452 }