[dpdk-stable] [PATCH] net/i40e: add warning info when no perfect RSS key

[Peng, Yuan]

Tested-by: Peng Yuan <yuan.peng at intel.com>

- Tested Branch: master
- Tested Commit: 239912fa798e6e671072ca7ff987afd74c1e506c
- OS: 4.13.9-300.fc27.x86_64
- GCC: gcc (GCC) 7.3.1 20180303 (Red Hat 7.3.1-5)
- CPU: Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz
- NIC: Intel Corporation Device Fortville [8086:1583]
- Default x86_64-native-linuxapp-gcc configuration
- Prerequisites:
- Total 1 case1, 1 passed, 0 failed

- Case steps:
1. Bind the pf port to dpdk driver:
./usertools/dpdk-devbind.py -b igb_uio 05:00.0 05:00.1
2. start testpmd:
./x86_64-native-linuxapp-gcc/app/testpmd --log-level=*:8 -c 1ffff -n 4 - -i --nb-cores=8 --rxq=4 --txq=4 --port-topology=chained

3. set an invalid RSS-key
 testpmd> flow create 0 ingress pattern end actions rss types ipv4-udp end key 67108863 / end
 i40e_config_rss_filter(): Max of contiguous 4 PF queues are configured
 i40e_config_rss_filter(): Warning! No perfect RSS key config for i40e, so use default configuration

Flow rule #0 created
 there is a device warning reported.


-----Original Message-----
From: Zhao1, Wei 
Sent: Wednesday, March 20, 2019 11:31 AM
To: dev at dpdk.org
Cc: Peng, Yuan <yuan.peng at intel.com>; stable at dpdk.org; Zhang, Qi Z <qi.z.zhang at intel.com>; Zhao1, Wei <wei.zhao1 at intel.com>
Subject: [PATCH] net/i40e: add warning info when no perfect RSS key

There need a warning info when no perfect RSS key is config, so i40e will use default key.

Fixes: ecad87d22383 ("net/i40e: move RSS to flow API")
Cc: stable at dpdk.org

Signed-off-by: Wei Zhao <wei.zhao1 at intel.com>
---
 drivers/net/i40e/i40e_ethdev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c index dca61f0..9235b08 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -12744,6 +12744,7 @@ i40e_config_rss_filter(struct i40e_pf *pf,
 		rss_conf.rss_key = (uint8_t *)rss_key_default;
 		rss_conf.rss_key_len = (I40E_PFQF_HKEY_MAX_INDEX + 1) *
 							sizeof(uint32_t);
+		PMD_DRV_LOG(INFO, "Warning! No perfect RSS key config for i40e, so 
+use default configuration\n");
 	}
 
 	i40e_hw_rss_hash_set(pf, &rss_conf);
--
2.7.5