drm/amdgpu: invalidate L2 before SDMA IBs (on gfx10)

[Deucher, Alexander]

[AMD Official Use Only - Internal Distribution Only]

Please split the patch into two, one to update the emit IB sequence, and one to bump the minor version.  That way we can make sure older kernels get the new sequence.  Also do we need an sdma fw version check for the new packet in the emi IB function?

Alex
________________________________
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> on behalf of Christian König <christian.koenig at amd.com>
Sent: Sunday, April 26, 2020 4:52 AM
To: Marek Olšák <maraeo at gmail.com>
Cc: amd-gfx mailing list <amd-gfx at lists.freedesktop.org>
Subject: Re: drm/amdgpu: invalidate L2 before SDMA IBs (on gfx10)

Thought so, we should try to get this get it committed ASAP. And maybe add a CC: stable tag as well.

Patch is Reviewed-by: Christian König <christian.koenig at amd.com><mailto:christian.koenig at amd.com>.

Thanks,
Christian.

Am 26.04.20 um 02:28 schrieb Marek Olšák:
Not without a mandatory firmware update. The gcr packet support for IBs was added into the sdma firmware just two weeks ago.

Marek

On Sat., Apr. 25, 2020, 11:04 Christian König, <ckoenig.leichtzumerken at gmail.com<mailto:ckoenig.leichtzumerken at gmail.com>> wrote:
Could we do this in userspace as well?

Am 25.04.20 um 10:52 schrieb Marek Olšák:
This should fix SDMA hangs on gfx10.

Marek



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