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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi DPDK Community, I'm currently working with dpdk-22.11 ( also tried current 24.07) and facin= g an issue when initializing 2=D725G Mellanox NICs (MT27800 Family [Connect= X-5]) on ARM based system. During device probing, I see the following errors: EAL: Probe PCI driver: mlx5_pci (15b3:1017) device: 0001:01:00.0 (socket -1= ) mlx5_common: Failed to allocate DevX UAR (BF/NC) mlx5_common: Failed to allocate UAR. mlx5_net: Failed to prepare Tx DevX UAR. mlx5_net: probe of PCI device 0001:01:00.0 aborted after encountering an er= ror: Operation not permitted Interestingly, the same setup works fine with 2=D7100G MT28800 Family [Conn= ectX-5 Ex] NICs. Also this 2x25G cards work well with Linux kernel. The issue is only with = DPDK binding. When I enable kernel prints, UAR allocation appears successful, suggesting = the issue may be DevX-specific on MT27800. I'd appreciate any guidance on: * Known limitations or configuration differences between MT27800 and MT= 28800 * Whether DevX should be disabled explicitly for MT27800 (e.g., MLX5_DE= VX=3D0) * Any firmware or kernel dependencies that might affect DevX support Thanks in advance for your help. Best Regards, Prashant Gupta --_000_AS8PR04MB82933143CF52A473CF05B0A0E5E8AAS8PR04MB8293eurp_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi DPDK Community,

 

I'm currently working with dpdk-22.11 ( also tried c= urrent 24.07) and facing an issue when initializing 2=D725G Mellanox NICs (= MT27800 Family [ConnectX-5]) on ARM based system.

 

During device probing, I see the following errors:

 

EAL: Probe PCI driver: mlx= 5_pci (15b3:1017) device: 0001:01:00.0 (socket -1)

mlx5_common: Failed to all= ocate DevX UAR (BF/NC)

mlx5_common: Failed to all= ocate UAR.

mlx5_net: Failed to prepar= e Tx DevX UAR.

mlx5_net: probe of PCI dev= ice 0001:01:00.0 aborted after encountering an error: Operation not permitt= ed

 

Interestingly, the same setup works fine with 2=D710= 0G MT28800 Family [ConnectX-5 Ex] NICs.

Also this 2x25G cards work well with Linux kernel.&n= bsp; The issue is only with DPDK binding.

 

When I enable kernel prints, UAR allocation appears = successful, suggesting the issue may be DevX-specific on MT27800.

 

I'd appreciate any guidance on:

  • Known limitations= or configuration differences between MT27800 and MT28800
    • Whether DevX should= be disabled explicitly for MT27800 (e.g., MLX5_DEVX=3D0)Any firmware or ker= nel dependencies that might affect DevX support

 

Thanks in advance for your help.

 

Best Regards,

Prashant Gupta

 

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