RE: DPDK with i225/226 on elkhartlake

["SamChen 陳嘉良" <SamChen@aaeon.com.tw>]

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Hi all,
I have switched to using vfio-pci, but still can't use DPDK. Attached are the logs I can't use in I225-IT and I226V for your reference.
If I have obtained other platforms with intel 225/226 systems, I will check again, thanks!

Sam Chen

-----Original Message-----
From: Bruce Richardson <bruce.richardson@intel.com> 
Sent: Wednesday, September 21, 2022 4:57 PM
To: SamChen 陳嘉良 <SamChen@aaeon.com.tw>
Cc: dev@dpdk.org
Subject: Re: DPDK with i225/226 on elkhartlake

On Wed, Sep 21, 2022 at 03:23:09AM +0000, SamChen 陳嘉良 wrote:
>    Hi,
>    We bind the uio_pci_generic driver and use the command of the attached
>    image to execute DPDK. However, we encountered the problem of device
>    cannot be used on i225V/i226V in elkhartlake platform. Currently, the
>    same method works fine for i211 and intel® Killer™ Ethernet E3100 2.5
>    Gbps. Do you have any suggestions? Thanks!
> 
Hi,

while I can't comment on the NIC-specific issues, I would just comment that it's really not recommended to use uio_pci_generic - or any other uio driver - for DPDK any more. You should consider switching to using vfio-pci. Even if there is no iommu enabled, vfio-pci still tends to give a better user experience. If iommu is enabled, you also get a lot more security from the memory protection it provides.

Regards,
/Bruce

[-- Attachment #2: i225-IT_log --]
[-- Type: application/octet-stream, Size: 1005 bytes --]

[nsd@localhost ~]$ sudo su
[sudo] password for nsd: 
[root@localhost nsd]# modprobe vfio-pci
[root@localhost nsd]# cd dpdk-22.07/usertools/
[root@localhost usertools]# ./dpdk-devbind.py -b vfio-pci 01:00.0 02:00.0
[root@localhost usertools]# cd ../build/app/
[root@localhost app]# ./dpdk-testpmd -l 0-1 -n 1
EAL: Detected CPU lcores: 4
EAL: Detected NUMA nodes: 1
EAL: Detected static linkage of DPDK
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Selected IOVA mode 'VA'
EAL: VFIO support initialized
TELEMETRY: No legacy callbacks, legacy socket not created
testpmd: No probed ethernet devices
testpmd: create a new mbuf pool <mb_pool_0>: n=155456, size=2176, socket=0
testpmd: preferred mempool ops selected: ring_mp_mc
Done
No commandline core given, start packet forwarding
io packet forwarding - ports=0 - cores=0 - streams=0 - NUMA support enabled, MP allocation mode: native

  io packet forwarding packets/burst=32
  nb forwarding cores=1 - nb forwarding ports=0
Press enter to exit


[-- Attachment #3: i226V_log --]
[-- Type: application/octet-stream, Size: 963 bytes --]

[nsd@localhost ~]$ sudo su
[sudo] password for nsd: 
[root@localhost nsd]# modprobe vfio-pci
[root@localhost nsd]# cd dpdk-22.07/usertools/
[root@localhost usertools]# ./dpdk-devbind.py -b vfio-pci 03:00.0 06:00.0
[root@localhost usertools]# cd ../build/app/
[root@localhost app]# ./dpdk-testpmd -l 0-1 -n 1
EAL: Detected CPU lcores: 4
EAL: Detected NUMA nodes: 1
EAL: Detected static linkage of DPDK
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Selected IOVA mode 'VA'
EAL: VFIO support initialized
EAL: Using IOMMU type 1 (Type 1)
EAL: Probe PCI driver: net_igc (8086:125c) device: 0000:03:00.0 (socket 0)
EAL: Releasing PCI mapped resource for 0000:03:00.0
EAL: Calling pci_unmap_resource for 0000:03:00.0 at 0x1100800000
EAL: Calling pci_unmap_resource for 0000:03:00.0 at 0x1100900000
EAL: Requested device 0000:03:00.0 cannot be used
EAL: Using IOMMU type 1 (Type 1)
EAL: Probe PCI driver: net_igc (8086:125c) device: 0000:06:00.0 (socket 0)