[PATCH 07/11] drm/amdgpu/virt: add two functions for MM table

[Alexander.Deucher@xxxxxxx (Deucher, Alexander)]

> -----Original Message-----
> From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf
> Of Xiangliang Yu
> Sent: Monday, April 24, 2017 2:58 AM
> To: amd-gfx at lists.freedesktop.org
> Cc: Yu, Xiangliang
> Subject: [PATCH 07/11] drm/amdgpu/virt: add two functions for MM table
> 
> Add two functions to allocate & free MM table memory.
> 
> Signed-off-by: Xiangliang Yu <Xiangliang.Yu at amd.com>

Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 46
> ++++++++++++++++++++++++++++++++
>  drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h |  2 ++
>  2 files changed, 48 insertions(+)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
> index 7fce7b5..1363239 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
> @@ -227,3 +227,49 @@ int amdgpu_virt_reset_gpu(struct amdgpu_device
> *adev)
> 
>  	return 0;
>  }
> +
> +/**
> + * amdgpu_virt_alloc_mm_table() - alloc memory for mm table
> + * @amdgpu:	amdgpu device.
> + * MM table is used by UVD and VCE for its initialization
> + * Return: Zero if allocate success.
> + */
> +int amdgpu_virt_alloc_mm_table(struct amdgpu_device *adev)
> +{
> +	int r;
> +
> +	if (!amdgpu_sriov_vf(adev) || adev->virt.mm_table.gpu_addr)
> +		return 0;
> +
> +	r = amdgpu_bo_create_kernel(adev, PAGE_SIZE, PAGE_SIZE,
> +				    AMDGPU_GEM_DOMAIN_VRAM,
> +				    &adev->virt.mm_table.bo,
> +				    &adev->virt.mm_table.gpu_addr,
> +				    (void *)&adev->virt.mm_table.cpu_addr);
> +	if (r) {
> +		DRM_ERROR("failed to alloc mm table and error = %d.\n", r);
> +		return r;
> +	}
> +
> +	memset((void *)adev->virt.mm_table.cpu_addr, 0, PAGE_SIZE);
> +	DRM_INFO("MM table gpu addr = 0x%llx, cpu addr = %p.\n",
> +		 adev->virt.mm_table.gpu_addr,
> +		 adev->virt.mm_table.cpu_addr);
> +	return 0;
> +}
> +
> +/**
> + * amdgpu_virt_free_mm_table() - free mm table memory
> + * @amdgpu:	amdgpu device.
> + * Free MM table memory
> + */
> +void amdgpu_virt_free_mm_table(struct amdgpu_device *adev)
> +{
> +	if (!amdgpu_sriov_vf(adev) || !adev->virt.mm_table.gpu_addr)
> +		return;
> +
> +	amdgpu_bo_free_kernel(&adev->virt.mm_table.bo,
> +			      &adev->virt.mm_table.gpu_addr,
> +			      (void *)&adev->virt.mm_table.cpu_addr);
> +	adev->virt.mm_table.gpu_addr = 0;
> +}
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
> index 1ee0a19..a8ed162 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.h
> @@ -98,5 +98,7 @@ int amdgpu_virt_request_full_gpu(struct
> amdgpu_device *adev, bool init);
>  int amdgpu_virt_release_full_gpu(struct amdgpu_device *adev, bool init);
>  int amdgpu_virt_reset_gpu(struct amdgpu_device *adev);
>  int amdgpu_sriov_gpu_reset(struct amdgpu_device *adev, bool voluntary);
> +int amdgpu_virt_alloc_mm_table(struct amdgpu_device *adev);
> +void amdgpu_virt_free_mm_table(struct amdgpu_device *adev);
> 
>  #endif
> --
> 2.7.4
> 
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