+/**
+ * Modify an Rx Hash queue configuration.
+ *
+ * @param dev
+ * Pointer to Ethernet device.
+ * @param hrxq
+ * Hash Rx queue to modify.
+ * @param rss_key
+ * RSS key for the Rx hash queue.
+ * @param hash_fields
+ * Verbs protocol hash field to make the RSS on.
+ * @param[in] ind_tbl
+ * Indirection table for TIR.
+ *
+ * @return
+ * 0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+static int
+mlx5_devx_hrxq_modify(struct rte_eth_dev *dev, struct mlx5_hrxq *hrxq,
+ const uint8_t *rss_key,
+ uint64_t hash_fields,
+ const struct mlx5_ind_table_obj *ind_tbl)
+{
+ struct mlx5_devx_modify_tir_attr modify_tir = {0};
+
+ /*
+ * untested for modification fields:
+ * - rx_hash_symmetric not set in hrxq_new(),
+ * - rx_hash_fn set hard-coded in hrxq_new(),
+ * - lro_xxx not set after rxq setup
+ */
+ if (ind_tbl != hrxq->ind_table)
+ modify_tir.modify_bitmask |=
+ MLX5_MODIFY_TIR_IN_MODIFY_BITMASK_INDIRECT_TABLE;
+ if (hash_fields != hrxq->hash_fields ||
+ memcmp(hrxq->rss_key, rss_key, MLX5_RSS_HASH_KEY_LEN))
+ modify_tir.modify_bitmask |=
+ MLX5_MODIFY_TIR_IN_MODIFY_BITMASK_HASH;
+ mlx5_devx_tir_attr_set(dev, rss_key, hash_fields, ind_tbl,
+ 0, /* N/A - tunnel modification unsupported */
+ &modify_tir.tir);
+ modify_tir.tirn = hrxq->tir->id;
+ if (mlx5_devx_cmd_modify_tir(hrxq->tir, &modify_tir)) {
+ DRV_LOG(ERR, "port %u cannot modify DevX TIR",
+ dev->data->port_id);
+ rte_errno = errno;
+ return -rte_errno;
+ }
+ return 0;
+}
+