[PATCH v2 10/13] ethdev: support telemetry query DCB info

[Jie Hai]

This patch supports querying DCB info.

The command is like:
--> /ethdev/dcb,0
{
  "/ethdev/dcb": {
    "tc_num": 1,
    "tc0": {
      "priority": 0,
      "bw_percent": "100%",
      "rxq_base": 0,
      "txq_base": 0,
      "nb_rxq": 4,
      "nb_txq": 4
    }
  }
}

Signed-off-by: Jie Hai <haij...@huawei.com>
---
 lib/ethdev/rte_ethdev_telemetry.c | 79 +++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)

diff --git a/lib/ethdev/rte_ethdev_telemetry.c 
b/lib/ethdev/rte_ethdev_telemetry.c
index 930181e5324f..d0d55993102b 100644
--- a/lib/ethdev/rte_ethdev_telemetry.c
+++ b/lib/ethdev/rte_ethdev_telemetry.c
@@ -629,6 +629,83 @@ eth_dev_handle_port_txq(const char *cmd __rte_unused,
        return 0;
 }
 
+static int
+eth_dev_add_dcb_tc(struct rte_eth_dcb_info *dcb_info, struct rte_tel_data *d)
+{
+       struct rte_tel_data *tcds[RTE_ETH_DCB_NUM_TCS] = {NULL};
+       struct rte_eth_dcb_tc_queue_mapping *tcq;
+       char bw_percent[RTE_TEL_MAX_STRING_LEN];
+       char name[RTE_TEL_MAX_STRING_LEN];
+       struct rte_tel_data *tcd;
+       uint32_t i;
+
+       for (i = 0; i < dcb_info->nb_tcs; i++) {
+               tcd = rte_tel_data_alloc();
+               if (tcd == NULL) {
+                       while (i-- > 0)
+                               rte_tel_data_free(tcds[i]);
+                       return -ENOMEM;
+               }
+
+               tcds[i] = tcd;
+               rte_tel_data_start_dict(tcd);
+
+               rte_tel_data_add_dict_uint(tcd, "priority", 
dcb_info->prio_tc[i]);
+               snprintf(bw_percent, RTE_TEL_MAX_STRING_LEN,
+                       "%u%%", dcb_info->tc_bws[i]);
+               rte_tel_data_add_dict_string(tcd, "bw_percent", bw_percent);
+
+               tcq = &dcb_info->tc_queue;
+               rte_tel_data_add_dict_uint(tcd, "rxq_base", 
tcq->tc_rxq[0][i].base);
+               rte_tel_data_add_dict_uint(tcd, "txq_base", 
tcq->tc_txq[0][i].base);
+               rte_tel_data_add_dict_uint(tcd, "nb_rxq", 
tcq->tc_rxq[0][i].nb_queue);
+               rte_tel_data_add_dict_uint(tcd, "nb_txq", 
tcq->tc_txq[0][i].nb_queue);
+
+               snprintf(name, RTE_TEL_MAX_STRING_LEN, "tc%u", i);
+               rte_tel_data_add_dict_container(d, name, tcd, 0);
+       }
+
+       return 0;
+}
+
+static int
+eth_dev_add_dcb_info(uint16_t port_id, struct rte_tel_data *d)
+{
+       struct rte_eth_dcb_info dcb_info;
+       int ret;
+
+       ret = rte_eth_dev_get_dcb_info(port_id, &dcb_info);
+       if (ret != 0) {
+               RTE_ETHDEV_LOG(ERR,
+                       "Failed to get dcb info, ret = %d\n", ret);
+               return ret;
+       }
+
+       rte_tel_data_start_dict(d);
+       rte_tel_data_add_dict_uint(d, "tc_num", dcb_info.nb_tcs);
+
+       if (dcb_info.nb_tcs > 0)
+               return eth_dev_add_dcb_tc(&dcb_info, d);
+
+       return 0;
+}
+
+static int
+eth_dev_handle_port_dcb(const char *cmd __rte_unused,
+               const char *params,
+               struct rte_tel_data *d)
+{
+       uint16_t port_id;
+       char *end_param;
+       int ret;
+
+       ret = eth_dev_parse_port_params(params, &port_id, &end_param, false);
+       if (ret < 0)
+               return ret;
+
+       return eth_dev_add_dcb_info(port_id, d);
+}
+
 RTE_INIT(ethdev_init_telemetry)
 {
        rte_telemetry_register_cmd("/ethdev/list", eth_dev_handle_port_list,
@@ -656,4 +733,6 @@ RTE_INIT(ethdev_init_telemetry)
                        "Returns Rx queue info for a port. Parameters: int 
port_id, int queue_id (Optional if only one queue)");
        rte_telemetry_register_cmd("/ethdev/tx_queue", eth_dev_handle_port_txq,
                        "Returns Tx queue info for a port. Parameters: int 
port_id, int queue_id (Optional if only one queue)");
+       rte_telemetry_register_cmd("/ethdev/dcb", eth_dev_handle_port_dcb,
+                       "Returns DCB info for a port. Parameters: int port_id");
 }
-- 
2.33.0