[PATCH] drm/amdgpu: Enable doorbell selfring if resize BAR successfully

[Xiao, Shane]

[AMD Official Use Only - General]

Ping.

> -----Original Message-----
> From: Xiao, Shane <shane.xiao at amd.com>
> Sent: Tuesday, April 18, 2023 2:55 PM
> To: amd-gfx at lists.freedesktop.org; Deucher, Alexander
> <Alexander.Deucher at amd.com>; Zhang, Hawking
> <Hawking.Zhang at amd.com>; Kuehling, Felix <Felix.Kuehling at amd.com>
> Cc: Xiao, Shane <shane.xiao at amd.com>; Liu, Aaron <Aaron.Liu at amd.com>;
> Hou, Xiaomeng (Matthew) <Xiaomeng.Hou at amd.com>
> Subject: [PATCH] drm/amdgpu: Enable doorbell selfring if resize BAR
> successfully
> 
> [Why]
> The selfring doorbell aperture will change when we resize FB BAR successfully
> during gmc sw init, we should reorder the sequence of enabling doorbell
> selfring aperture.
> 
> [How]
> Move enable_doorbell_selfring_aperture from *_common_hw_init to
> *_common_late_init.
> 
> This fixes the potential issue that GPU ring its own doorbell when this device is
> in translated mode with iommu is on.
> 
> Signed-off-by: Shane Xiao <shane.xiao at amd.com>
> Signed-off-by: Aaron Liu <aaron.liu at amd.com>
> Tested-by: Xiaomeng Hou <Xiaomeng.Hou at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/nv.c    | 4 +++-
>  drivers/gpu/drm/amd/amdgpu/soc15.c | 4 +++-
> drivers/gpu/drm/amd/amdgpu/soc21.c | 4 +++-
>  3 files changed, 9 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/nv.c
> b/drivers/gpu/drm/amd/amdgpu/nv.c index 47420b403871..f4c85634a4c8
> 100644
> --- a/drivers/gpu/drm/amd/amdgpu/nv.c
> +++ b/drivers/gpu/drm/amd/amdgpu/nv.c
> @@ -535,7 +535,8 @@ static void nv_enable_doorbell_aperture(struct
> amdgpu_device *adev,
>  					bool enable)
>  {
>  	adev->nbio.funcs->enable_doorbell_aperture(adev, enable);
> -	adev->nbio.funcs->enable_doorbell_selfring_aperture(adev, enable);
> +	if (!enable)
> +		adev->nbio.funcs->enable_doorbell_selfring_aperture(adev,
> false);
>  }
> 
>  const struct amdgpu_ip_block_version nv_common_ip_block = @@ -999,6
> +1000,7 @@ static int nv_common_late_init(void *handle)
>  		}
>  	}
> 
> +	adev->nbio.funcs->enable_doorbell_selfring_aperture(adev, true);
>  	return 0;
>  }
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c
> b/drivers/gpu/drm/amd/amdgpu/soc15.c
> index bc5dd80f10c1..0202de79a389 100644
> --- a/drivers/gpu/drm/amd/amdgpu/soc15.c
> +++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
> @@ -623,7 +623,8 @@ static void soc15_enable_doorbell_aperture(struct
> amdgpu_device *adev,
>  					   bool enable)
>  {
>  	adev->nbio.funcs->enable_doorbell_aperture(adev, enable);
> -	adev->nbio.funcs->enable_doorbell_selfring_aperture(adev, enable);
> +	if (!enable)
> +		adev->nbio.funcs->enable_doorbell_selfring_aperture(adev,
> false);
>  }
> 
>  const struct amdgpu_ip_block_version vega10_common_ip_block = @@ -
> 1125,6 +1126,7 @@ static int soc15_common_late_init(void *handle)
>  	if (amdgpu_sriov_vf(adev))
>  		xgpu_ai_mailbox_get_irq(adev);
> 
> +	adev->nbio.funcs->enable_doorbell_selfring_aperture(adev, true);
>  	return 0;
>  }
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/soc21.c
> b/drivers/gpu/drm/amd/amdgpu/soc21.c
> index 514bfc705d5a..cd4619085d67 100644
> --- a/drivers/gpu/drm/amd/amdgpu/soc21.c
> +++ b/drivers/gpu/drm/amd/amdgpu/soc21.c
> @@ -454,7 +454,8 @@ static void soc21_enable_doorbell_aperture(struct
> amdgpu_device *adev,
>  					bool enable)
>  {
>  	adev->nbio.funcs->enable_doorbell_aperture(adev, enable);
> -	adev->nbio.funcs->enable_doorbell_selfring_aperture(adev, enable);
> +	if (!enable)
> +		adev->nbio.funcs->enable_doorbell_selfring_aperture(adev,
> false);
>  }
> 
>  const struct amdgpu_ip_block_version soc21_common_ip_block = @@ -764,6
> +765,7 @@ static int soc21_common_late_init(void *handle)
>  			amdgpu_irq_get(adev, &adev-
> >nbio.ras_err_event_athub_irq, 0);
>  	}
> 
> +	adev->nbio.funcs->enable_doorbell_selfring_aperture(adev, true);
>  	return 0;
>  }
> 
> --
> 2.25.1