drivers/net/mlx5/mlx5_devx_cmds.c

   1 // SPDX-License-Identifier: BSD-3-Clause
   2 /* Copyright 2018 Mellanox Technologies, Ltd */
   3
   4 #include <rte_flow_driver.h>
   5
   6 #include "mlx5.h"
   7 #include "mlx5_glue.h"
   8 #include "mlx5_prm.h"
   9
  10 /**
  11  * Allocate flow counters via devx interface.
  12  *
  13  * @param[in] ctx
  14  *   ibv contexts returned from mlx5dv_open_device.
  15  * @param dcs
  16  *   Pointer to counters properties structure to be filled by the routine.
  17  *
  18  * @return
  19  *   0 on success, a negative value otherwise.
  20  */
  21 int mlx5_devx_cmd_flow_counter_alloc(struct ibv_context *ctx,
  22                                      struct mlx5_devx_counter_set *dcs)
  23 {
  24         uint32_t in[MLX5_ST_SZ_DW(alloc_flow_counter_in)]   = {0};
  25         uint32_t out[MLX5_ST_SZ_DW(alloc_flow_counter_out)] = {0};
  26         int status, syndrome;
  27
  28         MLX5_SET(alloc_flow_counter_in, in, opcode,
  29                  MLX5_CMD_OP_ALLOC_FLOW_COUNTER);
  30         dcs->obj = mlx5_glue->devx_obj_create(ctx, in,
  31                                               sizeof(in), out, sizeof(out));
  32         if (!dcs->obj)
  33                 return -errno;
  34         status = MLX5_GET(query_flow_counter_out, out, status);
  35         syndrome = MLX5_GET(query_flow_counter_out, out, syndrome);
  36         if (status) {
  37                 DRV_LOG(DEBUG, "Failed to create devx counters, "
  38                         "status %x, syndrome %x", status, syndrome);
  39                 return -1;
  40         }
  41         dcs->id = MLX5_GET(alloc_flow_counter_out,
  42                            out, flow_counter_id);
  43         return 0;
  44 }
  45
  46 /**
  47  * Free flow counters obtained via devx interface.
  48  *
  49  * @param[in] obj
  50  *   devx object that was obtained from mlx5_devx_cmd_fc_alloc.
  51  *
  52  * @return
  53  *   0 on success, a negative value otherwise.
  54  */
  55 int mlx5_devx_cmd_flow_counter_free(struct mlx5dv_devx_obj *obj)
  56 {
  57         return mlx5_glue->devx_obj_destroy(obj);
  58 }
  59
  60 /**
  61  * Query flow counters values.
  62  *
  63  * @param[in] dcs
  64  *   devx object that was obtained from mlx5_devx_cmd_fc_alloc.
  65  * @param[in] clear
  66  *   Whether hardware should clear the counters after the query or not.
  67  *  @param pkts
  68  *   The number of packets that matched the flow.
  69  *  @param bytes
  70  *    The number of bytes that matched the flow.
  71  *
  72  * @return
  73  *   0 on success, a negative value otherwise.
  74  */
  75 int
  76 mlx5_devx_cmd_flow_counter_query(struct mlx5_devx_counter_set *dcs,
  77                                  int clear __rte_unused,
  78                                  uint64_t *pkts, uint64_t *bytes)
  79 {
  80         uint32_t out[MLX5_ST_SZ_BYTES(query_flow_counter_out) +
  81                 MLX5_ST_SZ_BYTES(traffic_counter)]   = {0};
  82         uint32_t in[MLX5_ST_SZ_DW(query_flow_counter_in)] = {0};
  83         void *stats;
  84         int status, syndrome, rc;
  85
  86         MLX5_SET(query_flow_counter_in, in, opcode,
  87                  MLX5_CMD_OP_QUERY_FLOW_COUNTER);
  88         MLX5_SET(query_flow_counter_in, in, op_mod, 0);
  89         MLX5_SET(query_flow_counter_in, in, flow_counter_id, dcs->id);
  90         rc = mlx5_glue->devx_obj_query(dcs->obj,
  91                                        in, sizeof(in), out, sizeof(out));
  92         if (rc)
  93                 return rc;
  94         status = MLX5_GET(query_flow_counter_out, out, status);
  95         syndrome = MLX5_GET(query_flow_counter_out, out, syndrome);
  96         if (status) {
  97                 DRV_LOG(DEBUG, "Failed to query devx counters, "
  98                         "id %d, status %x, syndrome = %x",
  99                         status, syndrome, dcs->id);
 100                 return -1;
 101         }
 102         stats = MLX5_ADDR_OF(query_flow_counter_out,
 103                              out, flow_statistics);
 104         *pkts = MLX5_GET64(traffic_counter, stats, packets);
 105         *bytes = MLX5_GET64(traffic_counter, stats, octets);
 106         return 0;
 107 }