Re: print firmware versions on amdgpu sysfs

[Christian König <ckoenig.leichtzumerken@xxxxxxxxx>]

We just need to keep in mind that sysfs has more restrictions than debugfs.

E.g. one value per file, backward compatibility etc...

Apart from that I don't see any reason to not do it in sysfs.

Christian.

Am 26.04.19 um 20:35 schrieb Russell, Kent:

The main reasoning and use case for sysfs would be the SMI CLI, since unfortunately there is no ioctl support in there.

Kent

KENT RUSSELL
Sr. Software Engineer | Linux Compute Kernel
1 Commerce Valley Drive East
Markham, ON L3T 7X6
O +(1) 289-695-2122 | Ext 72122

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From: amd-gfx <amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> on behalf of Deucher, Alexander <Alexander.Deucher@xxxxxxx>
Sent: Friday, April 26, 2019 12:18:22 PM
To: Lin, Amber; amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: Freehill, Chris
Subject: Re: print firmware versions on amdgpu sysfs

 

We also expose the firmware versions via ioctl which is what the UMDs uses.  If you'd prefer it in sysfs, we could do that too.

Alex

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From: amd-gfx <amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> on behalf of Lin, Amber <Amber.Lin@xxxxxxx>
Sent: Friday, April 26, 2019 10:14 AM
To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: Freehill, Chris
Subject: print firmware versions on amdgpu sysfs

 

Hi Alex,

Currently we retrieve firmware versions from /sys/kernel/debug but this
requires debugfs being enabled and superuser privilege. Do you see a
concern we add firmware versions to amdgpu sysfs at
/sys/class/drm/cardX/device like vbios_version?

Regards,
Amber
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