netdev - Re: mlx5 driver loading failing on v4.19 / net-next / bpf-next

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Date:   Thu, 30 Aug 2018 11:35:50 +0300
From:   Tariq Toukan <tariqt@...lanox.com>
To:     Jesper Dangaard Brouer <brouer@...hat.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Cc:     Eran Ben Elisha <eranbe@...lanox.com>
Subject: Re: mlx5 driver loading failing on v4.19 / net-next / bpf-next



On 29/08/2018 6:05 PM, Jesper Dangaard Brouer wrote:
> Hi Saeed,
> 
> I'm having issues loading mlx5 driver on v4.19 kernels (tested both
> net-next and bpf-next), while kernel v4.18 seems to work.  It happens
> with a Mellanox ConnectX-5 NIC (and also a CX4-Lx but I removed that
> from the system now).
> 

Hi Jesper,

Thanks for your report!

We are working to analyze and debug the issue.

> One pain point is very long boot-time, caused by some timeout code in
> the driver. The kernel console log (dmesg) says:
> 
> [    5.763330] mlx5_core 0000:03:00.0: firmware version: 16.22.1002
> [    5.769367] mlx5_core 0000:03:00.0: 126.016 Gb/s available PCIe bandwidth, limited by 8 GT/s x16 link at 0000:00:02.0 (capable of 252.048 Gb/s with 16 GT/s x16 link)
> 
> (...) other drivers loading
> 
> [   66.816635] mlx5_core 0000:03:00.0: wait_func:964:(pid 112): ENABLE_HCA(0x104) timeout. Will cause a leak of a command resource
> [   66.828123] mlx5_core 0000:03:00.0: enable hca failed
> [   66.845516] mlx5_core 0000:03:00.0: mlx5_load_one failed with error code -110
> [   66.852802] mlx5_core: probe of 0000:03:00.0 failed with error -110
> 
> [   66.859347] mlx5_core 0000:03:00.1: firmware version: 16.22.1002
> [   66.865388] mlx5_core 0000:03:00.1: 126.016 Gb/s available PCIe bandwidth, limited by 8 GT/s x16 link at 0000:00:02.0 (capable of 252.048 Gb/s with 16 GT/s x16 link)
> 
> [  125.787395] XFS (sda3): Mounting V5 Filesystem
> [  125.848509] XFS (sda3): Ending clean mount
> [  127.984784] mlx5_core 0000:03:00.1: wait_func:964:(pid 5): ENABLE_HCA(0x104) timeout. Will cause a leak of a command resource
> [  127.996090] mlx5_core 0000:03:00.1: enable hca failed
> [  128.013819] mlx5_core 0000:03:00.1: mlx5_load_one failed with error code -110
> [  128.021076] mlx5_core: probe of 0000:03:00.1 failed with error -110
> 
> 
> Do you have any idea what could be causing this?
> 

We'll update regarding any progress.

Thanks!