[Freedreno] [PATCH 1/3] drm/msm/gpu: add per-process pagetables param

[Jordan Crouse]

On Tue, Apr 16, 2019 at 06:30:24PM -0700, Rob Clark wrote:
> From: Rob Clark <robdclark at chromium.org>
> 
> For now it always returns '0' (false), but once the iommu work is in
> place to enable per-process pagetables we can update the value returned.
> 
> Userspace needs to know this to make an informed decision about exposing
> KHR_robustness.
> 
> Signed-off-by: Rob Clark <robdclark at chromium.org>

Reviewed-by: Jordan Crouse <jcrouse at codeaurora.org>

> ---
>  drivers/gpu/drm/msm/adreno/adreno_gpu.c | 3 +++
>  include/uapi/drm/msm_drm.h              | 1 +
>  2 files changed, 4 insertions(+)
> 
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> index 2cfee1a4fe0b..fbdf6f1c247e 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
> @@ -62,6 +62,9 @@ int adreno_get_param(struct msm_gpu *gpu, uint32_t param, uint64_t *value)
>  	case MSM_PARAM_NR_RINGS:
>  		*value = gpu->nr_rings;
>  		return 0;
> +	case MSM_PARAM_PP_PGTABLE:
> +		*value = 0;
> +		return 0;
>  	default:
>  		DBG("%s: invalid param: %u", gpu->name, param);
>  		return -EINVAL;
> diff --git a/include/uapi/drm/msm_drm.h b/include/uapi/drm/msm_drm.h
> index 91a16b333c69..a9fdcf1689ce 100644
> --- a/include/uapi/drm/msm_drm.h
> +++ b/include/uapi/drm/msm_drm.h
> @@ -74,6 +74,7 @@ struct drm_msm_timespec {
>  #define MSM_PARAM_TIMESTAMP  0x05
>  #define MSM_PARAM_GMEM_BASE  0x06
>  #define MSM_PARAM_NR_RINGS   0x07
> +#define MSM_PARAM_PP_PGTABLE 0x08  /* => 1 for per-process pagetables, else 0 */
>  
>  struct drm_msm_param {
>  	__u32 pipe;           /* in, MSM_PIPE_x */
> -- 
> 2.20.1
> 
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