linux-kernel - Re: [PATCH AUTOSEL 5.6 33/50] drm/amdgpu: bump version for invalidate L2 before SDMA IBs

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Message-ID: <349b2cb9-71f9-a0cd-aceb-308512d7501a@daenzer.net>
Date:   Thu, 7 May 2020 18:11:17 +0200
From:   Michel Dänzer <michel@...nzer.net>
To:     Sasha Levin <sashal@...nel.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>,
        Marek Olšák <marek.olsak@....com>,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>
Subject: Re: [PATCH AUTOSEL 5.6 33/50] drm/amdgpu: bump version for invalidate
 L2 before SDMA IBs

On 2020-05-07 4:27 p.m., Sasha Levin wrote:
> From: Marek Olšák <marek.olsak@....com>
> 
> [ Upstream commit 9017a4897a20658f010bebea825262963c10afa6 ]
> 
> This fixes GPU hangs due to cache coherency issues.
> Bump the driver version. Split out from the original patch.
> 
> Signed-off-by: Marek Olšák <marek.olsak@....com>
> Reviewed-by: Christian König <christian.koenig@....com>
> Tested-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>
> Signed-off-by: Alex Deucher <alexander.deucher@....com>
> Signed-off-by: Sasha Levin <sashal@...nel.org>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> index 42f4febe24c6d..8d45a2b662aeb 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> @@ -85,9 +85,10 @@
>   * - 3.34.0 - Non-DC can flip correctly between buffers with different pitches
>   * - 3.35.0 - Add drm_amdgpu_info_device::tcc_disabled_mask
>   * - 3.36.0 - Allow reading more status registers on si/cik
> + * - 3.37.0 - L2 is invalidated before SDMA IBs, needed for correctness
>   */
>  #define KMS_DRIVER_MAJOR	3
> -#define KMS_DRIVER_MINOR	36
> +#define KMS_DRIVER_MINOR	37
>  #define KMS_DRIVER_PATCHLEVEL	0
>  
>  int amdgpu_vram_limit = 0;
> 

This requires the parent commit fdf83646c0542ecfb9adc4db8f741a1f43dca058
"drm/amdgpu: invalidate L2 before SDMA IBs (v2)". KMS_DRIVER_MINOR is
bumped to signal to userspace the fix in that commit is present.


-- 
Earthling Michel Dänzer               |               https://redhat.com
Libre software enthusiast             |             Mesa and X developer