[Intel-gfx] [PATCH 01/15] drm/i915: Add ctx getparam ioctl parameter to retrieve ctx unique id

[Deepak]

On 06/02/2016 10:48 AM, sourab.gupta at intel.com wrote:
> From: Sourab Gupta <sourab.gupta at intel.com>
>
> This patch adds a new ctx getparam ioctl parameter, which can be used to
> retrieve ctx unique id by userspace.
>
> This can be used by userspace to map the i915 perf samples with their
> particular ctx's, since those would be having ctx unique id's.
> Otherwise the userspace has no way of maintaining this association,
> since it has the knowledge of only per-drm file specific ctx handles.
>
> Signed-off-by: Sourab Gupta <sourab.gupta at intel.com>
> ---
>   drivers/gpu/drm/i915/i915_gem_context.c | 3 +++
>   include/uapi/drm/i915_drm.h             | 1 +
>   2 files changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
> index e974451..09f5178 100644
> --- a/drivers/gpu/drm/i915/i915_gem_context.c
> +++ b/drivers/gpu/drm/i915/i915_gem_context.c
> @@ -1001,6 +1001,9 @@ int i915_gem_context_getparam_ioctl(struct drm_device *dev, void *data,
>   		else
>   			args->value = to_i915(dev)->ggtt.base.total;
>   		break;
> +	case I915_CONTEXT_PARAM_HW_ID:
> +		args->value = ctx->hw_id;
> +		break;
>   	default:
>   		ret = -EINVAL;
>   		break;
> diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
> index 4a1bcfd8..0badc16 100644
> --- a/include/uapi/drm/i915_drm.h
> +++ b/include/uapi/drm/i915_drm.h
> @@ -1171,6 +1171,7 @@ struct drm_i915_gem_context_param {
>   #define I915_CONTEXT_PARAM_BAN_PERIOD	0x1
>   #define I915_CONTEXT_PARAM_NO_ZEROMAP	0x2
>   #define I915_CONTEXT_PARAM_GTT_SIZE	0x3
> +#define I915_CONTEXT_PARAM_HW_ID	0x4
>   	__u64 value;
>   };
>   
Patch looks good to me

Reviewed-by: Deepak S <deepak.s at linux.intel.com>