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* [dpdk-dev] [RFC] some questions for speed_capa usage
@ 2021-01-18 10:27 oulijun
  2021-01-18 11:23 ` Ferruh Yigit
  0 siblings, 1 reply; 3+ messages in thread
From: oulijun @ 2021-01-18 10:27 UTC (permalink / raw)
  To: dev; +Cc: linuxarm, lihuisong (C)


The 'speed_capa' will be reported in rte_eth_dev_info_get API. How 
should users use the field?

1) The driver reports only the capabilities supported by the NIC, and 
users only obtain the capabilities.
Maybe, there is a case that a rate bit in 'speed_capa' is not supported 
by the current transmission medium,
such as, copper cable optical modules and optical interface modules.

2) The field is used only to inform users of the speed_capa supported by 
the current transmission medium.
And users set the fixed speed or auto-negotiation by using 'link_speeds' 
according to the field.

According to the existing implementations of all drivers, it seems that 
both of the above behaviors exist.

How should we report and use it?


Lijun Ou

^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2021-01-23  9:09 UTC | newest]

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2021-01-18 10:27 [dpdk-dev] [RFC] some questions for speed_capa usage oulijun
2021-01-18 11:23 ` Ferruh Yigit
2021-01-23  9:06   ` oulijun

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