Re: [dpdk-dev] [PATCH V3 2/7] app/testpmd: fix DCB forwarding configuration

[Huisong Li <lihuisong@huawei.com>]

在 2021/4/27 18:59, Li, Xiaoyun 写道:
>
>> -----Original Message-----
>> From: Huisong Li <lihuisong@huawei.com>
>> Sent: Tuesday, April 20, 2021 17:01
>> To: dev@dpdk.org
>> Cc: Yigit, Ferruh <ferruh.yigit@intel.com>; Li, Xiaoyun <xiaoyun.li@intel.com>;
>> linuxarm@openeuler.org; lihuisong@huawei.com
>> Subject: [PATCH V3 2/7] app/testpmd: fix DCB forwarding configuration
>>
>> After DCB mode is configured, the operations of port stop and port start change
>> the value of the global variable "dcb_test", As a result, the forwarding
>> configuration from DCB to RSS mode, namely, “dcb_fwd_config_setup()” to
>> "rss_fwd_config_setup()".
>>
>> Currently, the 'dcb_flag' field in struct 'rte_port' indicates whether  the port is
>> configured with DCB. And it is sufficient to have 'dcb_config'
>> as a global variable to control the DCB test status. So this patch deletes the
>> "dcb_test".
>>
>> In addition, the 'dcb_config' is first set to 1 first in init_port_dcb_config(), but
>> the function may fail.
>>   So it should be moved to the end.
> Change this to the following will be better:
> In addition, setting 'dcb_config' at the end of init_port_dcb_config() in case that ports fail to enter DCB mode.
ok
>> Fixes: 900550de04a7 ("app/testpmd: add dcb support")
>> Fixes: ce8d561418d4 ("app/testpmd: add port configuration settings")
>> Fixes: 7741e4cf16c0 ("app/testpmd: VMDq and DCB updates")
>> Cc: stable@dpdk.org
>>
>> Signed-off-by: Huisong Li <lihuisong@huawei.com>
>> Signed-off-by: Lijun Ou <oulijun@huawei.com>
>> ---
>>   app/test-pmd/testpmd.c | 18 ++++--------------  app/test-pmd/testpmd.h |  1 -
>>   2 files changed, 4 insertions(+), 15 deletions(-)
>>
>> diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c index
>> d4be23f..a076b1d 100644
>> --- a/app/test-pmd/testpmd.c
>> +++ b/app/test-pmd/testpmd.c
>> @@ -246,9 +246,6 @@ uint16_t mb_mempool_cache = DEF_MBUF_CACHE;
>> /**< Size of mbuf mempool cache. */
>>   /* current configuration is in DCB or not,0 means it is not in DCB mode */
>> uint8_t dcb_config = 0;
>>
>> -/* Whether the dcb is in testing status */ -uint8_t dcb_test = 0;
>> -
>>   /*
>>    * Configurable number of RX/TX queues.
>>    */
>> @@ -2167,8 +2164,7 @@ start_packet_forwarding(int with_tx_first)
>>   		return;
>>   	}
>>
>> -
>> -	if(dcb_test) {
>> +	if (dcb_config) {
>>   		for (i = 0; i < nb_fwd_ports; i++) {
>>   			pt_id = fwd_ports_ids[i];
>>   			port = &ports[pt_id];
>> @@ -2476,8 +2472,6 @@ start_port(portid_t pid)
>>   	if (port_id_is_invalid(pid, ENABLED_WARN))
>>   		return 0;
>>
>> -	if(dcb_config)
>> -		dcb_test = 1;
>>   	RTE_ETH_FOREACH_DEV(pi) {
>>   		if (pid != pi && pid != (portid_t)RTE_PORT_ALL)
>>   			continue;
>> @@ -2717,11 +2711,6 @@ stop_port(portid_t pid)
>>   	portid_t peer_pl[RTE_MAX_ETHPORTS];
>>   	int peer_pi;
>>
>> -	if (dcb_test) {
>> -		dcb_test = 0;
>> -		dcb_config = 0;
>> -	}
>> -
>>   	if (port_id_is_invalid(pid, ENABLED_WARN))
>>   		return;
>>
>> @@ -3625,8 +3614,6 @@ init_port_dcb_config(portid_t pid,
>>   	rte_port = &ports[pid];
>>
>>   	memset(&port_conf, 0, sizeof(struct rte_eth_conf));
>> -	/* Enter DCB configuration status */
>> -	dcb_config = 1;
>>
>>   	port_conf.rxmode = rte_port->dev_conf.rxmode;
>>   	port_conf.txmode = rte_port->dev_conf.txmode; @@ -3694,6 +3681,9
>> @@ init_port_dcb_config(portid_t pid,
>>
>>   	rte_port->dcb_flag = 1;
>>
>> +	/* Enter DCB configuration status */
>> +	dcb_config = 1;
>> +
>>   	return 0;
>>   }
>>
>> diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h index
>> 9530ec5..432c66d 100644
>> --- a/app/test-pmd/testpmd.h
>> +++ b/app/test-pmd/testpmd.h
>> @@ -425,7 +425,6 @@ extern uint64_t noisy_lkup_num_reads;  extern uint64_t
>> noisy_lkup_num_reads_writes;
>>
>>   extern uint8_t dcb_config;
>> -extern uint8_t dcb_test;
>>
>>   extern uint32_t mbuf_data_size_n;
>>   extern uint16_t mbuf_data_size[MAX_SEGS_BUFFER_SPLIT];
>> --
>> 2.7.4