Re: [PATCH 1/5] drm/ttm: refactor out common code to setup a new tt backed resource

[Christian König <christian.koenig@xxxxxxx>]

Am 19.10.20 um 09:13 schrieb Dave Airlie:
> From: Dave Airlie <airlied@xxxxxxxxxx>
>
> This factors out the code to setup non-system tt.
>
> The same code was used twice in the move paths.
>
> Reviewed-by: Ben Skeggs <bskeggs@xxxxxxxxxx>
> Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>

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

> ---
>   drivers/gpu/drm/ttm/ttm_bo.c      | 12 +++--------
>   drivers/gpu/drm/ttm/ttm_bo_util.c | 34 +++++++++++++++++++++----------
>   include/drm/ttm/ttm_bo_driver.h   |  4 ++++
>   3 files changed, 30 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
> index b97ed6ca8765..cbc74a320db2 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -252,15 +252,9 @@ static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
>   		if (ret)
>   			goto out_err;
>   
> -		if (mem->mem_type != TTM_PL_SYSTEM) {
> -			ret = ttm_tt_populate(bdev, bo->ttm, ctx);
> -			if (ret)
> -				goto out_err;
> -
> -			ret = ttm_bo_tt_bind(bo, mem);
> -			if (ret)
> -				goto out_err;
> -		}
> +		ret = ttm_bo_move_to_new_tt_mem(bo, ctx, mem);
> +		if (ret)
> +			goto out_err;
>   	}
>   
>   	if (bdev->driver->move_notify)
> diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
> index ed1114235b66..a36c615bdf24 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo_util.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
> @@ -45,11 +45,30 @@ struct ttm_transfer_obj {
>   	struct ttm_buffer_object *bo;
>   };
>   
> +int ttm_bo_move_to_new_tt_mem(struct ttm_buffer_object *bo,
> +			      struct ttm_operation_ctx *ctx,
> +			      struct ttm_resource *new_mem)
> +{
> +	int ret;
> +
> +	if (new_mem->mem_type == TTM_PL_SYSTEM)
> +		return 0;
> +
> +	ret = ttm_tt_populate(bo->bdev, bo->ttm, ctx);
> +	if (unlikely(ret != 0))
> +		return ret;
> +
> +	ret = ttm_bo_tt_bind(bo, new_mem);
> +	if (unlikely(ret != 0))
> +		return ret;
> +
> +	return 0;
> +}
> +
>   int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
>   		   struct ttm_operation_ctx *ctx,
>   		    struct ttm_resource *new_mem)
>   {
> -	struct ttm_tt *ttm = bo->ttm;
>   	struct ttm_resource *old_mem = &bo->mem;
>   	int ret;
>   
> @@ -67,16 +86,9 @@ int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
>   		old_mem->mem_type = TTM_PL_SYSTEM;
>   	}
>   
> -	if (new_mem->mem_type != TTM_PL_SYSTEM) {
> -
> -		ret = ttm_tt_populate(bo->bdev, ttm, ctx);
> -		if (unlikely(ret != 0))
> -			return ret;
> -
> -		ret = ttm_bo_tt_bind(bo, new_mem);
> -		if (unlikely(ret != 0))
> -			return ret;
> -	}
> +	ret = ttm_bo_move_to_new_tt_mem(bo, ctx, new_mem);
> +	if (unlikely(ret != 0))
> +		return ret;
>   
>   	ttm_bo_assign_mem(bo, new_mem);
>   	return 0;
> diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
> index 3dbc11eb6787..1f4d2b1febd0 100644
> --- a/include/drm/ttm/ttm_bo_driver.h
> +++ b/include/drm/ttm/ttm_bo_driver.h
> @@ -593,6 +593,10 @@ int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
>   		    struct ttm_operation_ctx *ctx,
>   		    struct ttm_resource *new_mem);
>   
> +int ttm_bo_move_to_new_tt_mem(struct ttm_buffer_object *bo,
> +			      struct ttm_operation_ctx *ctx,
> +			      struct ttm_resource *new_mem);
> +
>   /**
>    * ttm_bo_move_memcpy
>    *

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