net/mlx5: add flow match on GENEVE item
[dpdk.git] / drivers / net / mlx5 / mlx5_devx_cmds.c
index 28d967a..51947d3 100644 (file)
@@ -57,7 +57,7 @@ mlx5_devx_cmd_flow_counter_alloc(struct ibv_context *ctx, uint32_t bulk_n_128)
  * @param[in] clear
  *   Whether hardware should clear the counters after the query or not.
  * @param[in] n_counters
- *   The counter number to read.
+ *   0 in case of 1 counter to read, otherwise the counter number to read.
  *  @param pkts
  *   The number of packets that matched the flow.
  *  @param bytes
@@ -229,6 +229,59 @@ mlx5_devx_cmd_destroy(struct mlx5_devx_obj *obj)
        return ret;
 }
 
+/**
+ * Query NIC vport context.
+ * Fills minimal inline attribute.
+ *
+ * @param[in] ctx
+ *   ibv contexts returned from mlx5dv_open_device.
+ * @param[in] vport
+ *   vport index
+ * @param[out] attr
+ *   Attributes device values.
+ *
+ * @return
+ *   0 on success, a negative value otherwise.
+ */
+static int
+mlx5_devx_cmd_query_nic_vport_context(struct ibv_context *ctx,
+                                     unsigned int vport,
+                                     struct mlx5_hca_attr *attr)
+{
+       uint32_t in[MLX5_ST_SZ_DW(query_nic_vport_context_in)] = {0};
+       uint32_t out[MLX5_ST_SZ_DW(query_nic_vport_context_out)] = {0};
+       void *vctx;
+       int status, syndrome, rc;
+
+       /* Query NIC vport context to determine inline mode. */
+       MLX5_SET(query_nic_vport_context_in, in, opcode,
+                MLX5_CMD_OP_QUERY_NIC_VPORT_CONTEXT);
+       MLX5_SET(query_nic_vport_context_in, in, vport_number, vport);
+       if (vport)
+               MLX5_SET(query_nic_vport_context_in, in, other_vport, 1);
+       rc = mlx5_glue->devx_general_cmd(ctx,
+                                        in, sizeof(in),
+                                        out, sizeof(out));
+       if (rc)
+               goto error;
+       status = MLX5_GET(query_nic_vport_context_out, out, status);
+       syndrome = MLX5_GET(query_nic_vport_context_out, out, syndrome);
+       if (status) {
+               DRV_LOG(DEBUG, "Failed to query NIC vport context, "
+                       "status %x, syndrome = %x",
+                       status, syndrome);
+               return -1;
+       }
+       vctx = MLX5_ADDR_OF(query_nic_vport_context_out, out,
+                           nic_vport_context);
+       attr->vport_inline_mode = MLX5_GET(nic_vport_context, vctx,
+                                          min_wqe_inline_mode);
+       return 0;
+error:
+       rc = (rc > 0) ? -rc : rc;
+       return rc;
+}
+
 /**
  * Query HCA attributes.
  * Using those attributes we can check on run time if the device
@@ -259,7 +312,7 @@ mlx5_devx_cmd_query_hca_attr(struct ibv_context *ctx,
        rc = mlx5_glue->devx_general_cmd(ctx,
                                         in, sizeof(in), out, sizeof(out));
        if (rc)
-               return rc;
+               goto error;
        status = MLX5_GET(query_hca_cap_out, out, status);
        syndrome = MLX5_GET(query_hca_cap_out, out, syndrome);
        if (status) {
@@ -271,6 +324,389 @@ mlx5_devx_cmd_query_hca_attr(struct ibv_context *ctx,
        hcattr = MLX5_ADDR_OF(query_hca_cap_out, out, capability);
        attr->flow_counter_bulk_alloc_bitmap =
                        MLX5_GET(cmd_hca_cap, hcattr, flow_counter_bulk_alloc);
+       attr->flow_counters_dump = MLX5_GET(cmd_hca_cap, hcattr,
+                                           flow_counters_dump);
        attr->eswitch_manager = MLX5_GET(cmd_hca_cap, hcattr, eswitch_manager);
+       attr->eth_net_offloads = MLX5_GET(cmd_hca_cap, hcattr,
+                                         eth_net_offloads);
+       attr->eth_virt = MLX5_GET(cmd_hca_cap, hcattr, eth_virt);
+       attr->flex_parser_protocols = MLX5_GET(cmd_hca_cap, hcattr,
+                                              flex_parser_protocols);
+       if (!attr->eth_net_offloads)
+               return 0;
+
+       /* Query HCA offloads for Ethernet protocol. */
+       memset(in, 0, sizeof(in));
+       memset(out, 0, sizeof(out));
+       MLX5_SET(query_hca_cap_in, in, opcode, MLX5_CMD_OP_QUERY_HCA_CAP);
+       MLX5_SET(query_hca_cap_in, in, op_mod,
+                MLX5_GET_HCA_CAP_OP_MOD_ETHERNET_OFFLOAD_CAPS |
+                MLX5_HCA_CAP_OPMOD_GET_CUR);
+
+       rc = mlx5_glue->devx_general_cmd(ctx,
+                                        in, sizeof(in),
+                                        out, sizeof(out));
+       if (rc) {
+               attr->eth_net_offloads = 0;
+               goto error;
+       }
+       status = MLX5_GET(query_hca_cap_out, out, status);
+       syndrome = MLX5_GET(query_hca_cap_out, out, syndrome);
+       if (status) {
+               DRV_LOG(DEBUG, "Failed to query devx HCA capabilities, "
+                       "status %x, syndrome = %x",
+                       status, syndrome);
+               attr->eth_net_offloads = 0;
+               return -1;
+       }
+       hcattr = MLX5_ADDR_OF(query_hca_cap_out, out, capability);
+       attr->wqe_vlan_insert = MLX5_GET(per_protocol_networking_offload_caps,
+                                        hcattr, wqe_vlan_insert);
+       attr->lro_cap = MLX5_GET(per_protocol_networking_offload_caps, hcattr,
+                                lro_cap);
+       attr->tunnel_lro_gre = MLX5_GET(per_protocol_networking_offload_caps,
+                                       hcattr, tunnel_lro_gre);
+       attr->tunnel_lro_vxlan = MLX5_GET(per_protocol_networking_offload_caps,
+                                         hcattr, tunnel_lro_vxlan);
+       attr->lro_max_msg_sz_mode = MLX5_GET
+                                       (per_protocol_networking_offload_caps,
+                                        hcattr, lro_max_msg_sz_mode);
+       for (int i = 0 ; i < MLX5_LRO_NUM_SUPP_PERIODS ; i++) {
+               attr->lro_timer_supported_periods[i] =
+                       MLX5_GET(per_protocol_networking_offload_caps, hcattr,
+                                lro_timer_supported_periods[i]);
+       }
+       attr->tunnel_stateless_geneve_rx =
+                           MLX5_GET(per_protocol_networking_offload_caps,
+                                    hcattr, tunnel_stateless_geneve_rx);
+       attr->geneve_max_opt_len =
+                   MLX5_GET(per_protocol_networking_offload_caps,
+                            hcattr, max_geneve_opt_len);
+       attr->wqe_inline_mode = MLX5_GET(per_protocol_networking_offload_caps,
+                                        hcattr, wqe_inline_mode);
+       if (attr->wqe_inline_mode != MLX5_CAP_INLINE_MODE_VPORT_CONTEXT)
+               return 0;
+       if (attr->eth_virt) {
+               rc = mlx5_devx_cmd_query_nic_vport_context(ctx, 0, attr);
+               if (rc) {
+                       attr->eth_virt = 0;
+                       goto error;
+               }
+       }
+       return 0;
+error:
+       rc = (rc > 0) ? -rc : rc;
+       return rc;
+}
+
+/**
+ * Query TIS transport domain from QP verbs object using DevX API.
+ *
+ * @param[in] qp
+ *   Pointer to verbs QP returned by ibv_create_qp .
+ * @param[in] tis_num
+ *   TIS number of TIS to query.
+ * @param[out] tis_td
+ *   Pointer to TIS transport domain variable, to be set by the routine.
+ *
+ * @return
+ *   0 on success, a negative value otherwise.
+ */
+int
+mlx5_devx_cmd_qp_query_tis_td(struct ibv_qp *qp, uint32_t tis_num,
+                             uint32_t *tis_td)
+{
+       uint32_t in[MLX5_ST_SZ_DW(query_tis_in)] = {0};
+       uint32_t out[MLX5_ST_SZ_DW(query_tis_out)] = {0};
+       int rc;
+       void *tis_ctx;
+
+       MLX5_SET(query_tis_in, in, opcode, MLX5_CMD_OP_QUERY_TIS);
+       MLX5_SET(query_tis_in, in, tisn, tis_num);
+       rc = mlx5_glue->devx_qp_query(qp, in, sizeof(in), out, sizeof(out));
+       if (rc) {
+               DRV_LOG(ERR, "Failed to query QP using DevX");
+               return -rc;
+       };
+       tis_ctx = MLX5_ADDR_OF(query_tis_out, out, tis_context);
+       *tis_td = MLX5_GET(tisc, tis_ctx, transport_domain);
        return 0;
 }
+
+/**
+ * Fill WQ data for DevX API command.
+ * Utility function for use when creating DevX objects containing a WQ.
+ *
+ * @param[in] wq_ctx
+ *   Pointer to WQ context to fill with data.
+ * @param [in] wq_attr
+ *   Pointer to WQ attributes structure to fill in WQ context.
+ */
+static void
+devx_cmd_fill_wq_data(void *wq_ctx, struct mlx5_devx_wq_attr *wq_attr)
+{
+       MLX5_SET(wq, wq_ctx, wq_type, wq_attr->wq_type);
+       MLX5_SET(wq, wq_ctx, wq_signature, wq_attr->wq_signature);
+       MLX5_SET(wq, wq_ctx, end_padding_mode, wq_attr->end_padding_mode);
+       MLX5_SET(wq, wq_ctx, cd_slave, wq_attr->cd_slave);
+       MLX5_SET(wq, wq_ctx, hds_skip_first_sge, wq_attr->hds_skip_first_sge);
+       MLX5_SET(wq, wq_ctx, log2_hds_buf_size, wq_attr->log2_hds_buf_size);
+       MLX5_SET(wq, wq_ctx, page_offset, wq_attr->page_offset);
+       MLX5_SET(wq, wq_ctx, lwm, wq_attr->lwm);
+       MLX5_SET(wq, wq_ctx, pd, wq_attr->pd);
+       MLX5_SET(wq, wq_ctx, uar_page, wq_attr->uar_page);
+       MLX5_SET64(wq, wq_ctx, dbr_addr, wq_attr->dbr_addr);
+       MLX5_SET(wq, wq_ctx, hw_counter, wq_attr->hw_counter);
+       MLX5_SET(wq, wq_ctx, sw_counter, wq_attr->sw_counter);
+       MLX5_SET(wq, wq_ctx, log_wq_stride, wq_attr->log_wq_stride);
+       MLX5_SET(wq, wq_ctx, log_wq_pg_sz, wq_attr->log_wq_pg_sz);
+       MLX5_SET(wq, wq_ctx, log_wq_sz, wq_attr->log_wq_sz);
+       MLX5_SET(wq, wq_ctx, dbr_umem_valid, wq_attr->dbr_umem_valid);
+       MLX5_SET(wq, wq_ctx, wq_umem_valid, wq_attr->wq_umem_valid);
+       MLX5_SET(wq, wq_ctx, log_hairpin_num_packets,
+                wq_attr->log_hairpin_num_packets);
+       MLX5_SET(wq, wq_ctx, log_hairpin_data_sz, wq_attr->log_hairpin_data_sz);
+       MLX5_SET(wq, wq_ctx, single_wqe_log_num_of_strides,
+                wq_attr->single_wqe_log_num_of_strides);
+       MLX5_SET(wq, wq_ctx, two_byte_shift_en, wq_attr->two_byte_shift_en);
+       MLX5_SET(wq, wq_ctx, single_stride_log_num_of_bytes,
+                wq_attr->single_stride_log_num_of_bytes);
+       MLX5_SET(wq, wq_ctx, dbr_umem_id, wq_attr->dbr_umem_id);
+       MLX5_SET(wq, wq_ctx, wq_umem_id, wq_attr->wq_umem_id);
+       MLX5_SET64(wq, wq_ctx, wq_umem_offset, wq_attr->wq_umem_offset);
+}
+
+/**
+ * Create RQ using DevX API.
+ *
+ * @param[in] ctx
+ *   ibv_context returned from mlx5dv_open_device.
+ * @param [in] rq_attr
+ *   Pointer to create RQ attributes structure.
+ * @param [in] socket
+ *   CPU socket ID for allocations.
+ *
+ * @return
+ *   The DevX object created, NULL otherwise and rte_errno is set.
+ */
+struct mlx5_devx_obj *
+mlx5_devx_cmd_create_rq(struct ibv_context *ctx,
+                       struct mlx5_devx_create_rq_attr *rq_attr,
+                       int socket)
+{
+       uint32_t in[MLX5_ST_SZ_DW(create_rq_in)] = {0};
+       uint32_t out[MLX5_ST_SZ_DW(create_rq_out)] = {0};
+       void *rq_ctx, *wq_ctx;
+       struct mlx5_devx_wq_attr *wq_attr;
+       struct mlx5_devx_obj *rq = NULL;
+
+       rq = rte_calloc_socket(__func__, 1, sizeof(*rq), 0, socket);
+       if (!rq) {
+               DRV_LOG(ERR, "Failed to allocate RQ data");
+               rte_errno = ENOMEM;
+               return NULL;
+       }
+       MLX5_SET(create_rq_in, in, opcode, MLX5_CMD_OP_CREATE_RQ);
+       rq_ctx = MLX5_ADDR_OF(create_rq_in, in, ctx);
+       MLX5_SET(rqc, rq_ctx, rlky, rq_attr->rlky);
+       MLX5_SET(rqc, rq_ctx, delay_drop_en, rq_attr->delay_drop_en);
+       MLX5_SET(rqc, rq_ctx, scatter_fcs, rq_attr->scatter_fcs);
+       MLX5_SET(rqc, rq_ctx, vsd, rq_attr->vsd);
+       MLX5_SET(rqc, rq_ctx, mem_rq_type, rq_attr->mem_rq_type);
+       MLX5_SET(rqc, rq_ctx, state, rq_attr->state);
+       MLX5_SET(rqc, rq_ctx, flush_in_error_en, rq_attr->flush_in_error_en);
+       MLX5_SET(rqc, rq_ctx, hairpin, rq_attr->hairpin);
+       MLX5_SET(rqc, rq_ctx, user_index, rq_attr->user_index);
+       MLX5_SET(rqc, rq_ctx, cqn, rq_attr->cqn);
+       MLX5_SET(rqc, rq_ctx, counter_set_id, rq_attr->counter_set_id);
+       MLX5_SET(rqc, rq_ctx, rmpn, rq_attr->rmpn);
+       wq_ctx = MLX5_ADDR_OF(rqc, rq_ctx, wq);
+       wq_attr = &rq_attr->wq_attr;
+       devx_cmd_fill_wq_data(wq_ctx, wq_attr);
+       rq->obj = mlx5_glue->devx_obj_create(ctx, in, sizeof(in),
+                                                 out, sizeof(out));
+       if (!rq->obj) {
+               DRV_LOG(ERR, "Failed to create RQ using DevX");
+               rte_errno = errno;
+               rte_free(rq);
+               return NULL;
+       }
+       rq->id = MLX5_GET(create_rq_out, out, rqn);
+       return rq;
+}
+
+/**
+ * Modify RQ using DevX API.
+ *
+ * @param[in] rq
+ *   Pointer to RQ object structure.
+ * @param [in] rq_attr
+ *   Pointer to modify RQ attributes structure.
+ *
+ * @return
+ *   0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+int
+mlx5_devx_cmd_modify_rq(struct mlx5_devx_obj *rq,
+                       struct mlx5_devx_modify_rq_attr *rq_attr)
+{
+       uint32_t in[MLX5_ST_SZ_DW(modify_rq_in)] = {0};
+       uint32_t out[MLX5_ST_SZ_DW(modify_rq_out)] = {0};
+       void *rq_ctx, *wq_ctx;
+       int ret;
+
+       MLX5_SET(modify_rq_in, in, opcode, MLX5_CMD_OP_MODIFY_RQ);
+       MLX5_SET(modify_rq_in, in, rq_state, rq_attr->rq_state);
+       MLX5_SET(modify_rq_in, in, rqn, rq->id);
+       MLX5_SET64(modify_rq_in, in, modify_bitmask, rq_attr->modify_bitmask);
+       rq_ctx = MLX5_ADDR_OF(modify_rq_in, in, ctx);
+       MLX5_SET(rqc, rq_ctx, state, rq_attr->state);
+       if (rq_attr->modify_bitmask &
+                       MLX5_MODIFY_RQ_IN_MODIFY_BITMASK_SCATTER_FCS)
+               MLX5_SET(rqc, rq_ctx, scatter_fcs, rq_attr->scatter_fcs);
+       if (rq_attr->modify_bitmask & MLX5_MODIFY_RQ_IN_MODIFY_BITMASK_VSD)
+               MLX5_SET(rqc, rq_ctx, vsd, rq_attr->vsd);
+       if (rq_attr->modify_bitmask &
+                       MLX5_MODIFY_RQ_IN_MODIFY_BITMASK_RQ_COUNTER_SET_ID)
+               MLX5_SET(rqc, rq_ctx, counter_set_id, rq_attr->counter_set_id);
+       MLX5_SET(rqc, rq_ctx, hairpin_peer_sq, rq_attr->hairpin_peer_sq);
+       MLX5_SET(rqc, rq_ctx, hairpin_peer_vhca, rq_attr->hairpin_peer_vhca);
+       if (rq_attr->modify_bitmask & MLX5_MODIFY_RQ_IN_MODIFY_BITMASK_WQ_LWM) {
+               wq_ctx = MLX5_ADDR_OF(rqc, rq_ctx, wq);
+               MLX5_SET(wq, wq_ctx, lwm, rq_attr->lwm);
+       }
+       ret = mlx5_glue->devx_obj_modify(rq->obj, in, sizeof(in),
+                                        out, sizeof(out));
+       if (ret) {
+               DRV_LOG(ERR, "Failed to modify RQ using DevX");
+               rte_errno = errno;
+               return -errno;
+       }
+       return ret;
+}
+
+/**
+ * Create TIR using DevX API.
+ *
+ * @param[in] ctx
+ *   ibv_context returned from mlx5dv_open_device.
+ * @param [in] tir_attr
+ *   Pointer to TIR attributes structure.
+ *
+ * @return
+ *   The DevX object created, NULL otherwise and rte_errno is set.
+ */
+struct mlx5_devx_obj *
+mlx5_devx_cmd_create_tir(struct ibv_context *ctx,
+                        struct mlx5_devx_tir_attr *tir_attr)
+{
+       uint32_t in[MLX5_ST_SZ_DW(create_tir_in)] = {0};
+       uint32_t out[MLX5_ST_SZ_DW(create_tir_out)] = {0};
+       void *tir_ctx, *outer, *inner;
+       struct mlx5_devx_obj *tir = NULL;
+       int i;
+
+       tir = rte_calloc(__func__, 1, sizeof(*tir), 0);
+       if (!tir) {
+               DRV_LOG(ERR, "Failed to allocate TIR data");
+               rte_errno = ENOMEM;
+               return NULL;
+       }
+       MLX5_SET(create_tir_in, in, opcode, MLX5_CMD_OP_CREATE_TIR);
+       tir_ctx = MLX5_ADDR_OF(create_tir_in, in, ctx);
+       MLX5_SET(tirc, tir_ctx, disp_type, tir_attr->disp_type);
+       MLX5_SET(tirc, tir_ctx, lro_timeout_period_usecs,
+                tir_attr->lro_timeout_period_usecs);
+       MLX5_SET(tirc, tir_ctx, lro_enable_mask, tir_attr->lro_enable_mask);
+       MLX5_SET(tirc, tir_ctx, lro_max_msg_sz, tir_attr->lro_max_msg_sz);
+       MLX5_SET(tirc, tir_ctx, inline_rqn, tir_attr->inline_rqn);
+       MLX5_SET(tirc, tir_ctx, rx_hash_symmetric, tir_attr->rx_hash_symmetric);
+       MLX5_SET(tirc, tir_ctx, tunneled_offload_en,
+                tir_attr->tunneled_offload_en);
+       MLX5_SET(tirc, tir_ctx, indirect_table, tir_attr->indirect_table);
+       MLX5_SET(tirc, tir_ctx, rx_hash_fn, tir_attr->rx_hash_fn);
+       MLX5_SET(tirc, tir_ctx, self_lb_block, tir_attr->self_lb_block);
+       MLX5_SET(tirc, tir_ctx, transport_domain, tir_attr->transport_domain);
+       for (i = 0; i < 10; i++) {
+               MLX5_SET(tirc, tir_ctx, rx_hash_toeplitz_key[i],
+                        tir_attr->rx_hash_toeplitz_key[i]);
+       }
+       outer = MLX5_ADDR_OF(tirc, tir_ctx, rx_hash_field_selector_outer);
+       MLX5_SET(rx_hash_field_select, outer, l3_prot_type,
+                tir_attr->rx_hash_field_selector_outer.l3_prot_type);
+       MLX5_SET(rx_hash_field_select, outer, l4_prot_type,
+                tir_attr->rx_hash_field_selector_outer.l4_prot_type);
+       MLX5_SET(rx_hash_field_select, outer, selected_fields,
+                tir_attr->rx_hash_field_selector_outer.selected_fields);
+       inner = MLX5_ADDR_OF(tirc, tir_ctx, rx_hash_field_selector_inner);
+       MLX5_SET(rx_hash_field_select, inner, l3_prot_type,
+                tir_attr->rx_hash_field_selector_inner.l3_prot_type);
+       MLX5_SET(rx_hash_field_select, inner, l4_prot_type,
+                tir_attr->rx_hash_field_selector_inner.l4_prot_type);
+       MLX5_SET(rx_hash_field_select, inner, selected_fields,
+                tir_attr->rx_hash_field_selector_inner.selected_fields);
+       tir->obj = mlx5_glue->devx_obj_create(ctx, in, sizeof(in),
+                                                  out, sizeof(out));
+       if (!tir->obj) {
+               DRV_LOG(ERR, "Failed to create TIR using DevX");
+               rte_errno = errno;
+               rte_free(tir);
+               return NULL;
+       }
+       tir->id = MLX5_GET(create_tir_out, out, tirn);
+       return tir;
+}
+
+/**
+ * Create RQT using DevX API.
+ *
+ * @param[in] ctx
+ *   ibv_context returned from mlx5dv_open_device.
+ * @param [in] rqt_attr
+ *   Pointer to RQT attributes structure.
+ *
+ * @return
+ *   The DevX object created, NULL otherwise and rte_errno is set.
+ */
+struct mlx5_devx_obj *
+mlx5_devx_cmd_create_rqt(struct ibv_context *ctx,
+                        struct mlx5_devx_rqt_attr *rqt_attr)
+{
+       uint32_t *in = NULL;
+       uint32_t inlen = MLX5_ST_SZ_BYTES(create_rqt_in) +
+                        rqt_attr->rqt_actual_size * sizeof(uint32_t);
+       uint32_t out[MLX5_ST_SZ_DW(create_rqt_out)] = {0};
+       void *rqt_ctx;
+       struct mlx5_devx_obj *rqt = NULL;
+       int i;
+
+       in = rte_calloc(__func__, 1, inlen, 0);
+       if (!in) {
+               DRV_LOG(ERR, "Failed to allocate RQT IN data");
+               rte_errno = ENOMEM;
+               return NULL;
+       }
+       rqt = rte_calloc(__func__, 1, sizeof(*rqt), 0);
+       if (!rqt) {
+               DRV_LOG(ERR, "Failed to allocate RQT data");
+               rte_errno = ENOMEM;
+               rte_free(in);
+               return NULL;
+       }
+       MLX5_SET(create_rqt_in, in, opcode, MLX5_CMD_OP_CREATE_RQT);
+       rqt_ctx = MLX5_ADDR_OF(create_rqt_in, in, rqt_context);
+       MLX5_SET(rqtc, rqt_ctx, rqt_max_size, rqt_attr->rqt_max_size);
+       MLX5_SET(rqtc, rqt_ctx, rqt_actual_size, rqt_attr->rqt_actual_size);
+       for (i = 0; i < rqt_attr->rqt_actual_size; i++)
+               MLX5_SET(rqtc, rqt_ctx, rq_num[i], rqt_attr->rq_list[i]);
+       rqt->obj = mlx5_glue->devx_obj_create(ctx, in, inlen, out, sizeof(out));
+       rte_free(in);
+       if (!rqt->obj) {
+               DRV_LOG(ERR, "Failed to create RQT using DevX");
+               rte_errno = errno;
+               rte_free(rqt);
+               return NULL;
+       }
+       rqt->id = MLX5_GET(create_rqt_out, out, rqtn);
+       return rqt;
+}