[PATCH v1 1/2] drm:amdgpu: enable IH ring1 for IH v7.0

[Christian König]

Am 03.07.24 um 19:49 schrieb Sunil Khatri:
> We need IH ring1 for handling the pagefault
> interrupts which over flow in default
> ring for specific usecases.
>
> Enable ring1 allows software to redirect
> high interrupts to ring1 from default IH
> ring.
>
> Signed-off-by: Sunil Khatri <sunil.khatri at amd.com>

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

> ---
>   drivers/gpu/drm/amd/amdgpu/ih_v7_0.c | 11 +++++++++--
>   1 file changed, 9 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/ih_v7_0.c b/drivers/gpu/drm/amd/amdgpu/ih_v7_0.c
> index aa6235dd4f2b..548b3c63a765 100644
> --- a/drivers/gpu/drm/amd/amdgpu/ih_v7_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/ih_v7_0.c
> @@ -546,8 +546,15 @@ static int ih_v7_0_sw_init(void *handle)
>   	adev->irq.ih.use_doorbell = true;
>   	adev->irq.ih.doorbell_index = adev->doorbell_index.ih << 1;
>   
> -	adev->irq.ih1.ring_size = 0;
> -	adev->irq.ih2.ring_size = 0;
> +	if (!(adev->flags & AMD_IS_APU)) {
> +		r = amdgpu_ih_ring_init(adev, &adev->irq.ih1, IH_RING_SIZE,
> +					use_bus_addr);
> +		if (r)
> +			return r;
> +
> +		adev->irq.ih1.use_doorbell = true;
> +		adev->irq.ih1.doorbell_index = (adev->doorbell_index.ih + 1) << 1;
> +	}
>   
>   	/* initialize ih control register offset */
>   	ih_v7_0_init_register_offset(adev);