[PATCH 08/16] drm/amdgpu: initialize ttm for doorbells

[Christian König]

Am 29.03.23 um 17:47 schrieb Shashank Sharma:
> From: Shashank Sharma <contactshashanksharma at gmail.com>
>
> This patch initialzes the ttm resource manager for doorbells.
>
> Cc: Alex Deucher <alexander.deucher at amd.com>
> Cc: Christian Koenig <christian.koenig at amd.com>
> Signed-off-by: Shashank Sharma <shashank.sharma at amd.com>

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

> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 8 ++++++++
>   1 file changed, 8 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> index 6f61491ef3dd..203d77a20507 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -1858,6 +1858,14 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
>   	DRM_INFO("amdgpu: %uM of GTT memory ready.\n",
>   		 (unsigned)(gtt_size / (1024 * 1024)));
>   
> +	/* Initiailize doorbell pool on PCI BAR */
> +	r = amdgpu_ttm_init_on_chip(adev, AMDGPU_PL_DOORBELL,
> +				    DIV_ROUND_UP(adev->doorbell.size, PAGE_SIZE));
> +	if (r) {
> +		DRM_ERROR("Failed initializing doorbell heap. \n");
> +		return r;
> +	}
> +
>   	/* Initialize preemptible memory pool */
>   	r = amdgpu_preempt_mgr_init(adev);
>   	if (r) {