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Date:      Sat, 20 Jan 2018 02:17:19 +0300
From:      Greg V <greg@unrelenting.technology>
To:        Hans Petter Selasky <hps@selasky.org>, freebsd-net@freebsd.org, freebsd-current@freebsd.org
Subject:   Re: mlx4 weird error "Failed to map EQ context memory" after update
Message-ID:  <cc1e0689-bd11-fb21-3b8f-8464a11461a1@unrelenting.technology>
In-Reply-To: <cd223168-28a2-de44-0eef-f7fbd2e3b5cc@selasky.org>
References:  <48f48a42-9115-8d97-5093-0e7173b36533@unrelenting.technology> <cd223168-28a2-de44-0eef-f7fbd2e3b5cc@selasky.org>

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On 01/19/2018 12:54, Hans Petter Selasky wrote:
> On 01/18/18 14:11, Greg V wrote:
>> Hi. I've upgraded CURRENT from December 19 
>> (https://github.com/freebsd/freebsd/commit/fd53ccf393f4f8ac1948e97eca108) 
>> to today 
>> (https://github.com/freebsd/freebsd/commit/391a83c86bb91ae3840cf37b7de478f42cc97e2a) 
>> and my Mellanox ConnectX-2 network card stopped working:
>>
>> mlx4_core0: <mlx4_core> mem 
>> 0xfe100000-0xfe1fffff,0xf0800000-0xf0ffffff irq 32 at device 0.0 on pci7
>> mlx4_core: Mellanox ConnectX core driver v3.4.1 (October 2017)
>> mlx4_core: Initializing mlx4_core
>> mlx4_core0: command 0xffa failed: fw status = 0x1
>> mlx4_core0: Failed to map EQ context memory, aborting
>> device_attach: mlx4_core0 attach returned 12
>>
>>
>> Loading the OLD mlx4.ko and mlx4en.ko on the NEW kernel actually does 
>> work fine!
>>
>> Reverting all mlx4 changes between then and now (no big changes, 
>> mostly just the 1 << 31 thing from D13858) and rebuilding the mlx4 
>> module with CC=clang50 does not help.
>>
>> What happened?!
>
> Hi,
>
> Can you do:
>
> objdump -Dx /boot/kernel/mlx4.ko > mlx4.ko.txt
> objdump -Dx /boot/kernel/mlx4en.ko > mlx4en.ko.txt
>
> And diff the text result between working and non-working ko's.
That results in 180883 lines (9.2 megabytes) of diff for mlx4.ko. The 
CC=clang50 one is only a bit better at 7.6 MB :(
> Can you also make sure that /boot/modules does not contain anything 
> *mlx4* ?
Yeah, it did not contain that.



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