Date:   Fri, 8 Apr 2022 09:02:48 +0200
From:   Thomas Kupper <thomas@...per.org>
To:     Shyam Sundar S K <Shyam-sundar.S-k@....com>
Cc:     Tom Lendacky <thomas.lendacky@....com>, netdev@...r.kernel.org
Subject: Re: AMD XGBE "phy irq request failed" kernel v5.17-rc2 on V1500B
 based board



Shyam Sundar S K wrote on 14.02.22 05:23:
>
> On 2/11/2022 9:18 PM, Tom Lendacky wrote:
>> On 2/11/22 03:49, Shyam Sundar S K wrote:
>>> On 2/11/2022 3:03 PM, Thomas Kupper wrote:
>>>> Am 08.02.22 um 17:24 schrieb Tom Lendacky:
>>>>> On 2/7/22 11:59, Thomas Kupper wrote:
>>>>>> Am 07.02.22 um 16:19 schrieb Shyam Sundar S K:
>>>>>>> On 2/7/2022 8:02 PM, Tom Lendacky wrote:
>>>>>>>> On 2/5/22 12:14, Thomas Kupper wrote:
>>>>>>>>> Am 05.02.22 um 16:51 schrieb Tom Lendacky:
>>>>>>>>>> On 2/5/22 04:06, Thomas Kupper wrote:
>>>> Thanks Tom, I now got time to update to 5.17-rc3 and add the 'debug'
>>>> module parameter. I assume that parameter works with the non-debug
>>>> kernel? I don't really see any new messages related to the amd-xgbe
>>>> driver:
>>>>
>>>> dmesg right after boot:
>>>>
>>>> [    0.000000] Linux version 5.17.0-rc3-tk (jane@...0q-ubu21) (gcc
>>>> (Ubuntu 11.2.0-7ubuntu2) 11.2.0, GNU ld (GNU Binutils for Ubuntu) 2.37)
>>>> #12 SMP PREEMPT Tue Feb 8 19:52:19 CET 2022
>>>> [    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-5.17.0-rc3-tk
>>>> root=UUID=8e462830-8ba0-4061-8f23-6f29ce751792 ro console=tty0
>>>> console=ttyS0,115200n8 amd_xgbe.dyndbg=+p amd_xgbe.debug=0x37
>>>> ...
>>>> [    5.275730] amd-xgbe 0000:06:00.1 eth0: net device enabled
>>>> [    5.277766] amd-xgbe 0000:06:00.2 eth1: net device enabled
>>>> [    5.665315] amd-xgbe 0000:06:00.2 enp6s0f2: renamed from eth1
>>>> [    5.696665] amd-xgbe 0000:06:00.1 enp6s0f1: renamed from eth0
>> Hmmm... that's strange. There should have been some messages issued by the
>> xgbe-phy-v2.c file from the xgbe_phy_init() routine.
>>
>> Thomas, if you're up for a bit of kernel hacking, can you remove the
>> "if (netif_msg_probe(pdata)) {" that wrap the dev_dbg() calls in the
>> xgbe-phy-v2.c file? There are 5 locations.
>>
>>>> dmesg right after 'ifconfig enp6s0f2 up'
>>>>
>>>> [   88.843454] amd_xgbe:xgbe_alloc_channels: amd-xgbe 0000:06:00.2
>>>> enp6s0f2: channel-0: cpu=0, node=0
>>
>>> Can you add this change and see if it solves the problem?
>>>
>>> https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=68c2d6af1f1e
>>>
>> I would imagine that patch has nothing to do with the real issue. Given
>> the previous messages of:
> Agreed. I guessed the earlier problem manifested after the driver
> removal. However, this one still appears like a BIOS misconfiguration.
>
>>> [  648.038655] genirq: Flags mismatch irq 59. 00000000 (enp6s0f2-pcs)
>>> vs. 00000000 (enp6s0f2-pcs)
>>> [  648.048303] amd-xgbe 0000:06:00.2 enp6s0f2: phy irq request failed
>> There should be no reason for not being able to obtain the IRQ.
>>
>> I suspect it is something in the BIOS setup that is not correct and thus
>> the Linux driver is not working properly because of bad input/setup from
>> the BIOS. This was probably worked around by the driver used in the
>> OPNsense DEC740 firewall.
>>
>> Shyam has worked more closely with the embedded area of this device, I'll
>> let him take it from here.
> I shall connect Thomas to BIOS folks and take it forward from there.

Hey Shyam and Tom,

After almost two months I unfortunately haven't heard of anyone from AMD
about a possible fix. And neither in the linux kernel nor the linux
netdev repo are any new commit related to the amd-xgbe driver.
Is there a way that I could get an answer? If you can't or won't do any
fix that's ok it just helps me if I know where I stand on this issue.

/Thomas
> Thanks,
> Shyam

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