[dpdk-dev] [PATCH V4 4/7] app/testpmd: add check for support of reporting DCB info

[Huisong Li <lihuisong@huawei.com>]

Currently, '.get_dcb_info' must be supported for the port doing DCB test,
or all information in 'rte_eth_dcb_info' are zero. It should be prevented
when user run cmd "port config 0 dcb vt off 4 pfc off".

This patch adds the check for support of reporting dcb info.

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Signed-off-by: Lijun Ou <oulijun@huawei.com>
---
 app/test-pmd/cmdline.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index 5fdcc1c..14750b3 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -3270,6 +3270,7 @@ cmd_config_dcb_parsed(void *parsed_result,
                         __rte_unused void *data)
 {
 	struct cmd_config_dcb *res = parsed_result;
+	struct rte_eth_dcb_info dcb_info;
 	portid_t port_id = res->port_id;
 	struct rte_port *port;
 	uint8_t pfc_en;
@@ -3292,6 +3293,14 @@ cmd_config_dcb_parsed(void *parsed_result,
 		printf("nb_cores shouldn't be less than number of TCs.\n");
 		return;
 	}
+
+	/* Check whether the port supports the report of DCB info. */
+	ret = rte_eth_dev_get_dcb_info(port_id, &dcb_info);
+	if (ret == -ENOTSUP) {
+		printf("The port must support rte_eth_dev_get_dcb_info API, or can't do dcb test.\n");
+		return;
+	}
+
 	if (!strncmp(res->pfc_en, "on", 2))
 		pfc_en = 1;
 	else
-- 
2.7.4