Re: [dpdk-dev] [Linuxarm] Re: [PATCH V2] app/testpmd: support Tx mbuf free on demand cmd

[oulijun <oulijun@huawei.com>]

在 2021/3/12 19:21, Thomas Monjalon 写道:
> 12/03/2021 11:29, oulijun:
>> 2021/3/10 15:59, Thomas Monjalon:
>>> 10/03/2021 02:48, oulijun:
>>>> Can we add an API such as rte_eth_get_device(pord_id)
>>>>
>>>> for example:
>>>> struct rte_eth_dev *
>>>> rte_eth_get_device(uint16_t port_id)
>>>> {
>>>>           return &rte_eth_devices[port_id];
>>>> }
>>> An application is not supposed to access the struct rte_eth_dev.
>>> Which info do you need from this struct?
>>
>> Applications cannot directly access the global variable
>> rte_eth_devices[]. To obtain information about rte_eth_dev, they need to
>> access the global variable through APIs instead of directly.
> 
> That's not the question.
> Which device info do you need, which is not already provided by
> one of the function rte_eth_*info* ?
> 	rte_eth_dev_get_dcb_info
> 	rte_eth_dev_get_reg_info
> 	rte_eth_dev_info_get
> 	rte_eth_rx_queue_info_get
> 	rte_eth_tx_queue_info_get
> 	rte_eth_dev_get_module_info
> 
Hi, Thomas
   I think dev->data->nb_tx_queues can be obtained through 
rte_eth_info_get, but dev->data->tx_queue_state[queue_id] has nowhere to 
be obtained. I think a patch needs to be added to obtain 
tx_queue_state[queue_id] through rte_eth_tx_queue_info_get. What do you 
think?

Thanks
Lijun Ou
> 
> 
> .
>