[PATCH 1/6] drm/ttm: cleanup and optimize ttm_bo_mem_compat v2

[Christian König]

Ping! Any more comments on that set or can I push it?

Thanks,
Christian.

Am 31.03.2017 um 11:47 schrieb Christian König:
> From: Christian König <christian.koenig at amd.com>
>
> No need to implement the same logic twice. Also check if the busy placements
> are identical to the already scanned placements before checking them.
>
> v2: improve check even more as suggested by Michel.
>
> Signed-off-by: Christian König <christian.koenig at amd.com>
> ---
>   drivers/gpu/drm/ttm/ttm_bo.c | 45 ++++++++++++++++++++++++--------------------
>   1 file changed, 25 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
> index 989b98b..348b17e 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -1046,29 +1046,17 @@ static int ttm_bo_move_buffer(struct ttm_buffer_object *bo,
>   	return ret;
>   }
>   
> -bool ttm_bo_mem_compat(struct ttm_placement *placement,
> -		       struct ttm_mem_reg *mem,
> -		       uint32_t *new_flags)
> +static bool ttm_bo_places_compat(const struct ttm_place *places,
> +				 unsigned num_placement,
> +				 struct ttm_mem_reg *mem,
> +				 uint32_t *new_flags)
>   {
> -	int i;
> +	unsigned i;
>   
> -	for (i = 0; i < placement->num_placement; i++) {
> -		const struct ttm_place *heap = &placement->placement[i];
> -		if (mem->mm_node &&
> -		    (mem->start < heap->fpfn ||
> -		     (heap->lpfn != 0 && (mem->start + mem->num_pages) > heap->lpfn)))
> -			continue;
> +	for (i = 0; i < num_placement; i++) {
> +		const struct ttm_place *heap = &places[i];
>   
> -		*new_flags = heap->flags;
> -		if ((*new_flags & mem->placement & TTM_PL_MASK_CACHING) &&
> -		    (*new_flags & mem->placement & TTM_PL_MASK_MEM))
> -			return true;
> -	}
> -
> -	for (i = 0; i < placement->num_busy_placement; i++) {
> -		const struct ttm_place *heap = &placement->busy_placement[i];
> -		if (mem->mm_node &&
> -		    (mem->start < heap->fpfn ||
> +		if (mem->mm_node && (mem->start < heap->fpfn ||
>   		     (heap->lpfn != 0 && (mem->start + mem->num_pages) > heap->lpfn)))
>   			continue;
>   
> @@ -1077,6 +1065,23 @@ bool ttm_bo_mem_compat(struct ttm_placement *placement,
>   		    (*new_flags & mem->placement & TTM_PL_MASK_MEM))
>   			return true;
>   	}
> +	return false;
> +}
> +
> +bool ttm_bo_mem_compat(struct ttm_placement *placement,
> +		       struct ttm_mem_reg *mem,
> +		       uint32_t *new_flags)
> +{
> +	if (ttm_bo_places_compat(placement->placement, placement->num_placement,
> +				 mem, new_flags))
> +		return true;
> +
> +	if ((placement->busy_placement != placement->placement ||
> +	     placement->num_busy_placement > placement->num_placement) &&
> +	    ttm_bo_places_compat(placement->busy_placement,
> +				 placement->num_busy_placement,
> +				 mem, new_flags))
> +		return true;
>   
>   	return false;
>   }