[dpdk-dev] [PATCH v2] app/testpmd: fix dcb config failure

[Konstantin Ananyev]

After adding RSS hash offload check, default rss_hf will fail on devices
that do not support all bits. This will lead to dcb config failure. The
patch fixes this issue by reading current valid rss_conf from the device.

Fixes: 8863a1fbfc66 ("ethdev: add supported hash function check")
Fixes: 1a572499beb6 ("app/testpmd: setup DCB forwarding based on traffic class")

Signed-off-by: Konstantin Ananyev <konstantin.anan...@intel.com>
---
 app/test-pmd/testpmd.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index f504ca35a..ee48db2a3 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -2484,12 +2484,14 @@ const uint16_t vlan_tags[] = {
 };
 
 static  int
-get_eth_dcb_conf(struct rte_eth_conf *eth_conf,
+get_eth_dcb_conf(portid_t pid, struct rte_eth_conf *eth_conf,
                 enum dcb_mode_enable dcb_mode,
                 enum rte_eth_nb_tcs num_tcs,
                 uint8_t pfc_en)
 {
        uint8_t i;
+       int32_t rc;
+       struct rte_eth_rss_conf rss_conf;
 
        /*
         * Builds up the correct configuration for dcb+vt based on the vlan 
tags array
@@ -2529,6 +2531,10 @@ get_eth_dcb_conf(struct rte_eth_conf *eth_conf,
                struct rte_eth_dcb_tx_conf *tx_conf =
                                &eth_conf->tx_adv_conf.dcb_tx_conf;
 
+               rc = rte_eth_dev_rss_hash_conf_get(pid, &rss_conf);
+               if (rc != 0)
+                       return rc;
+
                rx_conf->nb_tcs = num_tcs;
                tx_conf->nb_tcs = num_tcs;
 
@@ -2536,8 +2542,9 @@ get_eth_dcb_conf(struct rte_eth_conf *eth_conf,
                        rx_conf->dcb_tc[i] = i % num_tcs;
                        tx_conf->dcb_tc[i] = i % num_tcs;
                }
+
                eth_conf->rxmode.mq_mode = ETH_MQ_RX_DCB_RSS;
-               eth_conf->rx_adv_conf.rss_conf.rss_hf = rss_hf;
+               eth_conf->rx_adv_conf.rss_conf = rss_conf;
                eth_conf->txmode.mq_mode = ETH_MQ_TX_DCB;
        }
 
@@ -2571,7 +2578,7 @@ init_port_dcb_config(portid_t pid,
        port_conf.txmode = rte_port->dev_conf.txmode;
 
        /*set configuration of DCB in vt mode and DCB in non-vt mode*/
-       retval = get_eth_dcb_conf(&port_conf, dcb_mode, num_tcs, pfc_en);
+       retval = get_eth_dcb_conf(pid, &port_conf, dcb_mode, num_tcs, pfc_en);
        if (retval < 0)
                return retval;
        port_conf.rxmode.offloads |= DEV_RX_OFFLOAD_VLAN_FILTER;
-- 
2.13.6