[dpdk-dev] seeing a problem dpdk startup

[Gavin Hu (Arm Technology China)]

Hi Venumadhav,

> -----Original Message-----
> From: dev <dev-bounces at dpdk.org> On Behalf Of Venumadhav Josyula
> Sent: Thursday, November 28, 2019 3:01 PM
> To: dev at dpdk.org; users at dpdk.org
> Cc: Venumadhav Josyula <vjosyula at parallelwireless.com>
> Subject: [dpdk-dev] seeing a problem dpdk startup
> 
> We are seeing following error, no device is detected....
> ==========
> EAL: Detected 8 lcore(s)
> EAL: Detected 2 NUMA nodes
> EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
> EAL: No free hugepages reported in hugepages-1048576kB
> EAL: Probing VFIO support...
> EAL: VFIO support initialized
> EAL: PCI device 0000:04:00.0 on NUMA socket 0
> EAL:   probe driver: 8086:1528 net_ixgbe
> EAL:   0000:04:00.0 failed to select IOMMU type
> EAL: Requested device 0000:04:00.0 cannot be used
> EAL: PCI device 0000:04:00.1 on NUMA socket 0
> EAL:   probe driver: 8086:1528 net_ixgbe
> EAL:   0000:04:00.1 failed to select IOMMU type
> EAL: Requested device 0000:04:00.1 cannot be used
> 
> ==================
> dmesg
> 
> [55455.259493] vfio-pci 0000:04:00.0: Device is ineligible for IOMMU domain
> attach due to platform RMRR requirement.  Contact your platform vendor.
> [55455.260947] vfio-pci 0000:04:00.1: Device is ineligible for IOMMU domain
> attach due to platform RMRR requirement.  Contact your platform vendor.
> 
> ======
> BOOT_IMAGE=/boot/vmlinuz-3.10.0-957.el7.pw.1.x86_64 root=/dev/sda3
> intel_iommu=on
> 
> 
> Can anybody suggest how to work around the issue ?
Did you check if the device is bound to DPDK? 
Here is an example on my host:
gavin at net-arm-thunderx2-01:~/dpdk$ ./usertools/dpdk-devbind.py -s

Network devices using DPDK-compatible driver
============================================
0000:0f:00.0 'Ethernet Controller XL710 for 40GbE QSFP+ 1583' drv=vfio-pci unused=i40e
0000:8a:00.0 'Ethernet Controller XXV710 for 25GbE SFP28 158b' drv=vfio-pci unused=i40e
0000:8a:00.1 'Ethernet Controller XXV710 for 25GbE SFP28 158b' drv=vfio-pci unused=i40e
> 
> Thanks,
> Regards,
> Venu