[Intel-gfx] [PATCH 8/9] drm/i915: Support context single submission

[Chris Wilson]

On Tue, May 17, 2016 at 04:19:08AM -0400, Zhi Wang wrote:
> This patch introduces the support of context signle submission. As GVT
> context may come from different guests, which requires different
> configuration of render registers. It can't be combined in a dual ELSP
> submission combo.
> 
> We make this function as a context feature in context creation service.
> Only GVT-g will create this kinds of GEM context currently.
> 
> v5:
> 
> - Only compile this feature when CONFIG_DRM_I915_GVT=y. (Tvrtko)
> 
> Signed-off-by: Zhi Wang <zhi.a.wang at intel.com>
> ---
>  drivers/gpu/drm/i915/i915_drv.h  |  2 +-
>  drivers/gpu/drm/i915/intel_lrc.c | 15 +++++++++++++++
>  2 files changed, 16 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 9688006..b8f1e9a 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -890,8 +890,8 @@ struct intel_context {
>  	bool use_48bit_addressing_mode;
>  #if IS_ENABLED(CONFIG_DRM_I915_GVT)
>  	bool enable_status_change_notification;
> +	bool single_submission;
>  #endif
> -
>  	struct list_head link;
>  };
>  
> diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
> index 9069836..8d1a9c2 100644
> --- a/drivers/gpu/drm/i915/intel_lrc.c
> +++ b/drivers/gpu/drm/i915/intel_lrc.c
> @@ -455,6 +455,21 @@ static void execlists_context_unqueue(struct intel_engine_cs *engine)
>  			i915_gem_request_unreference(req0);
>  			req0 = cursor;
>  		} else {
> +#if IS_ENABLED(CONFIG_DRM_I915_GVT)
> +

But no ifdefs in code.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre