Re: [PATCH] drm/amdgpu: enable paging queue doorbell support v2

[Christian König <ckoenig.leichtzumerken@xxxxxxxxx>]

Am 15.11.18 um 20:10 schrieb Yang, Philip:
> paging queues doorbell index use existing assignment sDMA_HI_PRI_ENGINE0/1
> index, and increase SDMA_DOORBELL_RANGE size from 2 dwords to 4 dwords to
> enable the new doorbell index.
>
> v2: disable paging queue doorbell on Vega10 and Vega12 with SRIOV
>
> Change-Id: I9adb965f16ee4089d261d9a22231337739184e49
> Signed-off-by: Philip Yang <Philip.Yang@xxxxxxx>

Acked-by: Christian König <christian.koenig@xxxxxxx>

> ---
>   drivers/gpu/drm/amd/amdgpu/nbio_v6_1.c |  2 +-
>   drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c |  2 +-
>   drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c | 26 ++++++++++++++++++--------
>   3 files changed, 20 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.c b/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.c
> index 6f9c54978cc1..0eb42c29ecac 100644
> --- a/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.c
> +++ b/drivers/gpu/drm/amd/amdgpu/nbio_v6_1.c
> @@ -80,7 +80,7 @@ static void nbio_v6_1_sdma_doorbell_range(struct amdgpu_device *adev, int instan
>   
>   	if (use_doorbell) {
>   		doorbell_range = REG_SET_FIELD(doorbell_range, BIF_SDMA0_DOORBELL_RANGE, OFFSET, doorbell_index);
> -		doorbell_range = REG_SET_FIELD(doorbell_range, BIF_SDMA0_DOORBELL_RANGE, SIZE, 2);
> +		doorbell_range = REG_SET_FIELD(doorbell_range, BIF_SDMA0_DOORBELL_RANGE, SIZE, 4);
>   	} else
>   		doorbell_range = REG_SET_FIELD(doorbell_range, BIF_SDMA0_DOORBELL_RANGE, SIZE, 0);
>   
> diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c b/drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c
> index f8cee95d61cc..9342ee03d7d4 100644
> --- a/drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c
> +++ b/drivers/gpu/drm/amd/amdgpu/nbio_v7_4.c
> @@ -76,7 +76,7 @@ static void nbio_v7_4_sdma_doorbell_range(struct amdgpu_device *adev, int instan
>   
>   	if (use_doorbell) {
>   		doorbell_range = REG_SET_FIELD(doorbell_range, BIF_SDMA0_DOORBELL_RANGE, OFFSET, doorbell_index);
> -		doorbell_range = REG_SET_FIELD(doorbell_range, BIF_SDMA0_DOORBELL_RANGE, SIZE, 2);
> +		doorbell_range = REG_SET_FIELD(doorbell_range, BIF_SDMA0_DOORBELL_RANGE, SIZE, 4);
>   	} else
>   		doorbell_range = REG_SET_FIELD(doorbell_range, BIF_SDMA0_DOORBELL_RANGE, SIZE, 0);
>   
> diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
> index f4490cdd9804..1f19f15bb171 100644
> --- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
> @@ -925,11 +925,9 @@ static void sdma_v4_0_page_resume(struct amdgpu_device *adev, unsigned int i)
>   					OFFSET, ring->doorbell_index);
>   	WREG32_SDMA(i, mmSDMA0_PAGE_DOORBELL, doorbell);
>   	WREG32_SDMA(i, mmSDMA0_PAGE_DOORBELL_OFFSET, doorbell_offset);
> -	/* TODO: enable doorbell support */
> -	/*adev->nbio_funcs->sdma_doorbell_range(adev, i, ring->use_doorbell,
> -					      ring->doorbell_index);*/
>   
> -	sdma_v4_0_ring_set_wptr(ring);
> +	/* paging queue doorbell index is already enabled at sdma_v4_0_gfx_resume */
> +	sdma_v4_0_page_ring_set_wptr(ring);
>   
>   	/* set minor_ptr_update to 0 after wptr programed */
>   	WREG32_SDMA(i, mmSDMA0_PAGE_MINOR_PTR_UPDATE, 0);
> @@ -1504,9 +1502,6 @@ static int sdma_v4_0_sw_init(void *handle)
>   		ring->ring_obj = NULL;
>   		ring->use_doorbell = true;
>   
> -		DRM_INFO("use_doorbell being set to: [%s]\n",
> -				ring->use_doorbell?"true":"false");
> -
>   		if (adev->asic_type == CHIP_VEGA10)
>   			ring->doorbell_index = (i == 0) ?
>   				(AMDGPU_VEGA10_DOORBELL64_sDMA_ENGINE0 << 1) //get DWORD offset
> @@ -1516,6 +1511,8 @@ static int sdma_v4_0_sw_init(void *handle)
>   				(AMDGPU_DOORBELL64_sDMA_ENGINE0 << 1) //get DWORD offset
>   				: (AMDGPU_DOORBELL64_sDMA_ENGINE1 << 1); // get DWORD offset
>   
> +		DRM_DEBUG("use_doorbell being set to: [%s] doorbell index %d\n",
> +			ring->use_doorbell?"true":"false", ring->doorbell_index);
>   
>   		sprintf(ring->name, "sdma%d", i);
>   		r = amdgpu_ring_init(adev, ring, 1024,
> @@ -1529,7 +1526,20 @@ static int sdma_v4_0_sw_init(void *handle)
>   		if (adev->sdma.has_page_queue) {
>   			ring = &adev->sdma.instance[i].page;
>   			ring->ring_obj = NULL;
> -			ring->use_doorbell = false;
> +			if (!amdgpu_sriov_vf(adev) || adev->asic_type == CHIP_VEGA20)
> +				ring->use_doorbell = true;
> +
> +			if (adev->asic_type == CHIP_VEGA10)
> +				ring->doorbell_index = (i == 0) ?
> +					(AMDGPU_VEGA10_DOORBELL64_sDMA_HI_PRI_ENGINE0 << 1)
> +					: (AMDGPU_VEGA10_DOORBELL64_sDMA_HI_PRI_ENGINE1 << 1);
> +			else
> +				ring->doorbell_index = (i == 0) ?
> +					(AMDGPU_DOORBELL64_sDMA_HI_PRI_ENGINE0 << 1)
> +					: (AMDGPU_DOORBELL64_sDMA_HI_PRI_ENGINE1 << 1);
> +
> +			DRM_DEBUG("paging queue doorbell being set to: [%s] doorbell index %d\n",
> +				ring->use_doorbell?"true":"false", ring->doorbell_index);
>   
>   			sprintf(ring->name, "page%d", i);
>   			r = amdgpu_ring_init(adev, ring, 1024,

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