Hi
Am 19.02.20 um 14:53 schrieb Nirmoy Das:
> Calculate GEM VRAM bo's offset within vram-helper without depending on
> bo->offset
>
> Signed-off-by: Nirmoy Das <nirmoy.das@xxxxxxx>
> ---
> drivers/gpu/drm/drm_gem_vram_helper.c | 17 ++++++++++++++++-
> 1 file changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c b/drivers/gpu/drm/drm_gem_vram_helper.c
> index 92a11bb42365..3edf5f241c15 100644
> --- a/drivers/gpu/drm/drm_gem_vram_helper.c
> +++ b/drivers/gpu/drm/drm_gem_vram_helper.c
> @@ -198,6 +198,21 @@ u64 drm_gem_vram_mmap_offset(struct drm_gem_vram_object *gbo)
> }
> EXPORT_SYMBOL(drm_gem_vram_mmap_offset);
>
> +/**
> + * drm_gem_vram_pg_offset() - Returns a GEM VRAM object's page offset
> + * @gbo: the GEM VRAM object
> + *
> + * Returns:
> + * The buffer object's page offset, or
> + * 0 with a warning when memory manager node of the buffer object is NULL
> + * */
> +static s64 drm_gem_vram_pg_offset(struct drm_gem_vram_object *gbo)
> +{
> + if (WARN_ON_ONCE(!gbo->bo.mem.mm_node))
> + return 0;
> + return gbo->bo.mem.start;
> +}
As Daniel said, you don't heve to document this function. Otherwise
Reviewed-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
> +
> /**
> * drm_gem_vram_offset() - \
> Returns a GEM VRAM object's offset in video memory
> @@ -214,7 +229,7 @@ s64 drm_gem_vram_offset(struct drm_gem_vram_object *gbo)
> {
> if (WARN_ON_ONCE(!gbo->pin_count))
> return (s64)-ENODEV;
> - return gbo->bo.offset;
> + return drm_gem_vram_pg_offset(gbo) << PAGE_SHIFT;
> }
> EXPORT_SYMBOL(drm_gem_vram_offset);
>
> --
> 2.25.0
>
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>
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer
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