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From: Anjali Kulkarni <anjali@juniper.net>
To: "dev@dpdk.org" <dev@dpdk.org>
Thread-Topic: Question on using SR-IOV with dpdk apps
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Date: Mon, 4 Aug 2014 19:43:55 +0000
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Subject: [dpdk-dev] Question on using SR-IOV with dpdk apps
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Hi,

I am using SR-IOV and pass through to run a DPDK app. I am running it on
host. SR-IOV should split the NIC into multiple Vfs. I have split each NIC
into 2 Vfs. However, when I run the DPDK app, I get error initializing the
port no.2 of DPDK.
I am running the app with these options:
--rx "(0,0,0,1),(1,0,2,1), (2,0,3,1), (3,0,4,1)" --tx "(0,1), (1,1),
(2,1), (3,1)"

This is for 2 physical NICs, each having 2 Vfs. The error I get is:

Initializing NIC port 0 ...                                    |
|RPIOIF DETACHED  =20
|Initializing NIC port 0 RX queue 0 ...                         |
|                 =20
|Initializing NIC port 0 TX queue 0 ...                         |
|HOSTIF DETACHED  =20
|Initializing NIC port 1 ...                                    |
|                 =20
|Initializing NIC port 1 RX queue 0 ...                         |
|                 =20
|Initializing NIC port 1 TX queue 0 ...                         |
|                 =20
|Initializing NIC port 2 ...                                    |
|                 =20
|PANIC in app_init_nics():                                      |
|                 =20
|Cannot init NIC port 2 (-22)


Can someone pls clarify how DPDK views it's port nos, i.e. Scans the
devices and sees each nic? I see 4 /dev/uioX devices. I assume it scans
for these igb_uio devices. These are present. Then why can it not detect
the other 2 NICs?

Thanks
Anjali