RE: how to bind VF interface into dpdk (Balakrishnan K)

RE: how to bind VF interface into dpdk (Balakrishnan K)

[Varghese, Vipin]

[AMD Official Use Only - General]

Hi Balakrishnan K,

With respect to error (shared below), I believe this is expected 

```
> [ 1394.034137] uio_pci_generic 0000:06:00.0: No IRQ assigned to device: no support for interrupts?
> [ 1394.037596] uio_pci_generic 0000:06:00.0: No IRQ assigned to device: no support for interrupts?
> [ 1421.498627] uio_pci_generic 0000:06:00.0: No IRQ assigned to device: no support for interrupts?
> [ 1421.500976] uio_pci_generic 0000:06:00.0: No IRQ assigned to device: no support for interrupts?
```

Please refer https://doc.dpdk.org/guides/nics/ixgbe.html, section `30.4.5. X550 does not support legacy interrupt mode`.

With respect to the original error (shared below)

```
>     I am trying to bind VF interface to dpdk using dpdk-devbind.py. Unable to bind getting error ?.
```

As per the IXGBE PMD documentation, one has to follow

```
Step-1: insmod ixgbe.ko MDD=0,0
Step-2: PF port is Kernel driver
Step-3: create VF
Step-4: modprobe vfio `` ``nointxmask=1
Step-5: then bind the VF devices with `vfio-pci`
```

For your question ` cannot bind to driver uio_pci_generic?`, I humbly request to check ` The errata is the item #22 from X550 spec update` in section ` 30.4.5.1. Description`. Then check with Intel Network PMD maintainer if this can be fixed.

Note: please do let us know if vfio-pci or igb_uio works for VF devices under X540 (as I do not have similar card I unable to test it out for you).

> -----Original Message-----
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>    1. RE: how to bind VF interface into dpdk (Balakrishnan K)
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> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Thu, 15 Sep 2022 07:12:18 +0000
> From: Balakrishnan K <Balakrishnan.K1@tatacommunications.com>
> To: Satish Patel <satish.txt@gmail.com>
> Cc: "users@dpdk.org" <users@dpdk.org>
> Subject: RE: how to bind VF interface into dpdk
> Message-ID:
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> <PSAPR04MB5516A8F5642DE6BA160F37B1D6499@PSAPR04MB5516.apcprd0
> 4.prod.outlook.com>
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> Content-Type: text/plain; charset="utf-8"
> 
> Hi Sathish,
>   Thanks for the input .
> Checked the dmesg  below are the error msg.
> [ 1394.034137] uio_pci_generic 0000:06:00.0: No IRQ assigned to device: no
> support for interrupts?
> [ 1394.037596] uio_pci_generic 0000:06:00.0: No IRQ assigned to device: no
> support for interrupts?
> [ 1421.498627] uio_pci_generic 0000:06:00.0: No IRQ assigned to device: no
> support for interrupts?
> [ 1421.500976] uio_pci_generic 0000:06:00.0: No IRQ assigned to device: no
> support for interrupts?
> 
> Is any BIOS setting needed to resolve the issue.
> 
> 
> Regards,
> Bala
> 
> 
> 
> From: Satish Patel <satish.txt@gmail.com>
> Sent: 15 September 2022 08:00
> To: Balakrishnan K <Balakrishnan.K1@tatacommunications.com>
> Cc: users@dpdk.org
> Subject: Re: how to bind VF interface into dpdk
> 
> 
> CAUTION: This email originated from outside of the organization. Do not click
> links or open attachments unless you recognize the sender and know the
> content is safe.
> Hi,
> 
>  I would also check dmesg logs for any indication or warning. I had an issue
> like that and it turned out to be a BIOS setting related to some nic shared
> memory.
> 
> On Wed, Sep 14, 2022 at 8:30 AM Balakrishnan K
> <Balakrishnan.K1@tatacommunications.com<mailto:Balakrishnan.K1@tataco
> mmunications.com>> wrote:
> Hi All,
>     I am trying to bind VF interface to dpdk using dpdk-devbind.py.
> Unable to bind getting error ?cannot bind to driver uio_pci_generic?.
> Steps followed:
> 1.modprobe uio_pci_generic
> 2. dpdk-devbind.py -b uio_pci_generic 0000:05:00.0
> 
> Also tried with vfio-pci driver not succeeded.
> Attaching the dpdk-devbind -s output and the error which I got.
> 
> Am I missing something could any one please help on this.
> 
> [cid:image001.png@01D8C900.9517D660]
> 
> [cid:image002.png@01D8C900.9517D660]
> 
> Regards,
> Bala
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