[Mesa-dev] [PATCH 2/2] r600g/radeonsi: Prefer VRAM for CPU -> GPU streaming buffers

[Marek Olšák]

Reviewed-by: Marek Olšák <marek.olsak at amd.com>

Marek

On Thu, Jul 31, 2014 at 11:43 AM, Michel Dänzer <michel at daenzer.net> wrote:
> From: Michel Dänzer <michel.daenzer at amd.com>
>
> Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
> ---
>  src/gallium/drivers/radeon/r600_buffer_common.c | 15 +++++++++++----
>  1 file changed, 11 insertions(+), 4 deletions(-)
>
> diff --git a/src/gallium/drivers/radeon/r600_buffer_common.c b/src/gallium/drivers/radeon/r600_buffer_common.c
> index 154c33d..d747cbc 100644
> --- a/src/gallium/drivers/radeon/r600_buffer_common.c
> +++ b/src/gallium/drivers/radeon/r600_buffer_common.c
> @@ -110,14 +110,21 @@ bool r600_init_resource(struct r600_common_screen *rscreen,
>         enum radeon_bo_flag flags = 0;
>
>         switch (res->b.b.usage) {
> -       case PIPE_USAGE_DYNAMIC:
> -       case PIPE_USAGE_STREAM:
> -               flags = RADEON_FLAG_GTT_WC;
> -               /* fall through */
>         case PIPE_USAGE_STAGING:
>                 /* Transfers are likely to occur more often with these resources. */
>                 res->domains = RADEON_DOMAIN_GTT;
>                 break;
> +       case PIPE_USAGE_STREAM:
> +       case PIPE_USAGE_DYNAMIC:
> +               /* Older kernels didn't always flush the HDP cache before
> +                * CS execution
> +                */
> +               if (rscreen->info.drm_minor < 40) {
> +                       res->domains = RADEON_DOMAIN_GTT;
> +                       flags = RADEON_FLAG_GTT_WC;
> +                       break;
> +               }
> +               /* fall through */
>         case PIPE_USAGE_DEFAULT:
>         case PIPE_USAGE_IMMUTABLE:
>         default:
> --
> 2.0.1
>
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