[PATCH 1/3] drm/ttm: Helper function to get TTM mem limit

[Christian König]

Am 26.04.23 um 03:52 schrieb Mukul Joshi:
> Add a helper function to get TTM memory limit. This is
> needed by KFD to set its own internal memory limits.
>
> Signed-off-by: Mukul Joshi <mukul.joshi at amd.com>

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

> ---
>   drivers/gpu/drm/ttm/ttm_tt.c | 6 ++++++
>   include/drm/ttm/ttm_tt.h     | 2 +-
>   2 files changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
> index d505603930a7..1f765dd7792c 100644
> --- a/drivers/gpu/drm/ttm/ttm_tt.c
> +++ b/drivers/gpu/drm/ttm/ttm_tt.c
> @@ -449,3 +449,9 @@ ttm_kmap_iter_tt_init(struct ttm_kmap_iter_tt *iter_tt,
>   	return &iter_tt->base;
>   }
>   EXPORT_SYMBOL(ttm_kmap_iter_tt_init);
> +
> +unsigned long ttm_tt_pages_limit(void)
> +{
> +	return ttm_pages_limit;
> +}
> +EXPORT_SYMBOL(ttm_tt_pages_limit);
> diff --git a/include/drm/ttm/ttm_tt.h b/include/drm/ttm/ttm_tt.h
> index b7d3f3843f1e..d54b2dc05d71 100644
> --- a/include/drm/ttm/ttm_tt.h
> +++ b/include/drm/ttm/ttm_tt.h
> @@ -222,7 +222,7 @@ void ttm_tt_mgr_init(unsigned long num_pages, unsigned long num_dma32_pages);
>   
>   struct ttm_kmap_iter *ttm_kmap_iter_tt_init(struct ttm_kmap_iter_tt *iter_tt,
>   					    struct ttm_tt *tt);
> -
> +unsigned long ttm_tt_pages_limit(void);
>   #if IS_ENABLED(CONFIG_AGP)
>   #include <linux/agp_backend.h>
>