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From: "Richardson, Bruce" <bruce.richardson@intel.com>
To: Tetsuya.Mukawa <mukawa@igel.co.jp>, "dev@dpdk.org" <dev@dpdk.org>
Thread-Topic: [dpdk-dev] How to know corresponding device from port number
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Date: Tue, 26 Nov 2013 10:38:53 +0000
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Subject: Re: [dpdk-dev] How to know corresponding device from port number
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>=20
> Hi,
>=20
> I have a question about how to know corresponding device from port
> number.
> For example, if I have 4 Ethernet devices and 2 Ring PMDs, I will get 6 p=
orts
> during initialization.
> In the case, how can I know which port corresponds last Ring PMD?

[BR] Firstly, to identify the ring PMD's vs the ethernet device PMDs you ca=
n use the information in the rte_eth_dev structure. For each device x, (0 <=
=3D x <=3D5), if you check rte_eth_devices[x], the ring pmd's will have a N=
ULL driver pointer and the pci address given in the pci_dev structure will =
be all-zeros.
As for distinguishing two different ring ethdevs from each other, I'm not a=
ware of any way to do this, they will just have different eth_dev indexes.