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Fri, 12 Mar 2021 06:21:09 -0500 (EST)
From: Thomas Monjalon <thomas@monjalon.net>
To: oulijun <oulijun@huawei.com>
Cc: linuxarm@openeuler.org, dev <dev@dpdk.org>
Date: Fri, 12 Mar 2021 12:21:06 +0100
Message-ID: <13135629.FDAB5nOBdD@thomas>
In-Reply-To: <070496a4-3403-8c42-c80d-941b43e3fc4a@huawei.com>
References: <1614929583-37727-1-git-send-email-oulijun@huawei.com>
<5590583.7m7mD32AY9@thomas> <070496a4-3403-8c42-c80d-941b43e3fc4a@huawei.com>
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Subject: Re: [dpdk-dev] [Linuxarm] Re: [PATCH V2] app/testpmd: support Tx
mbuf free on demand cmd
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Sender: "dev" <dev-bounces@dpdk.org>
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