Re: [PATCH 29/53] drm/i915: Update add_request() to take a request structure

[Tomas Elf <tomas.elf@intel.com>]

On 19/02/2015 17:17, John.C.Harrison@Intel.com wrote:
> From: John Harrison <John.C.Harrison@Intel.com>
>
> Now that all callers of i915_add_request() have a request pointer to hand, it is
> possible to update the add request function to take a request pointer rather
> than pulling it out of the OLR.
>
> For: VIZ-5115
> Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
> ---
>   drivers/gpu/drm/i915/i915_drv.h            |   10 +++++-----
>   drivers/gpu/drm/i915/i915_gem.c            |   24 ++++++++++++------------
>   drivers/gpu/drm/i915/i915_gem_execbuffer.c |    2 +-
>   drivers/gpu/drm/i915/intel_display.c       |    2 +-
>   drivers/gpu/drm/i915/intel_lrc.c           |    2 +-
>   drivers/gpu/drm/i915/intel_overlay.c       |    4 ++--
>   drivers/gpu/drm/i915/intel_ringbuffer.c    |    3 ++-
>   7 files changed, 24 insertions(+), 23 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 34fd338..9206328 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -2830,14 +2830,14 @@ void i915_gem_init_swizzling(struct drm_device *dev);
>   void i915_gem_cleanup_ringbuffer(struct drm_device *dev);
>   int __must_check i915_gpu_idle(struct drm_device *dev);
>   int __must_check i915_gem_suspend(struct drm_device *dev);
> -int __i915_add_request(struct intel_engine_cs *ring,
> +int __i915_add_request(struct drm_i915_gem_request *req,
>   		       struct drm_file *file,
>   		       struct drm_i915_gem_object *batch_obj,
>   		       bool flush_caches);
> -#define i915_add_request(ring) \
> -	__i915_add_request(ring, NULL, NULL, true)
> -#define i915_add_request_no_flush(ring) \
> -	__i915_add_request(ring, NULL, NULL, false)
> +#define i915_add_request(req) \
> +	__i915_add_request(req, NULL, NULL, true)
> +#define i915_add_request_no_flush(req) \
> +	__i915_add_request(req, NULL, NULL, false)
>   int __i915_wait_request(struct drm_i915_gem_request *req,
>   			unsigned reset_counter,
>   			bool interruptible,
> diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
> index 0c7e1bd..24fb7b9 100644
> --- a/drivers/gpu/drm/i915/i915_gem.c
> +++ b/drivers/gpu/drm/i915/i915_gem.c
> @@ -1162,7 +1162,7 @@ i915_gem_check_olr(struct drm_i915_gem_request *req)
>
>   	ret = 0;
>   	if (req == req->ring->outstanding_lazy_request)
> -		ret = i915_add_request(req->ring);
> +		ret = i915_add_request(req);
>
>   	return ret;
>   }
> @@ -2407,25 +2407,25 @@ i915_gem_get_seqno(struct drm_device *dev, u32 *seqno)
>   	return 0;
>   }
>
> -int __i915_add_request(struct intel_engine_cs *ring,
> +int __i915_add_request(struct drm_i915_gem_request *request,
>   		       struct drm_file *file,
>   		       struct drm_i915_gem_object *obj,
>   		       bool flush_caches)
>   {
> -	struct drm_i915_private *dev_priv = ring->dev->dev_private;
> -	struct drm_i915_gem_request *request;
> +	struct intel_engine_cs *ring;
> +	struct drm_i915_private *dev_priv;
>   	struct intel_ringbuffer *ringbuf;
>   	u32 request_start;
>   	int ret;
>
> -	request = ring->outstanding_lazy_request;
>   	if (WARN_ON(request == NULL))
>   		return -ENOMEM;
>
> -	if (i915.enable_execlists) {
> -		ringbuf = request->ctx->engine[ring->id].ringbuf;
> -	} else
> -		ringbuf = ring->buffer;
> +	ring = request->ring;
> +	dev_priv = ring->dev->dev_private;
> +	ringbuf = request->ringbuf;
> +
> +	WARN_ON(request != ring->outstanding_lazy_request);
>
>   	request_start = intel_ring_get_tail(ringbuf);
>   	/*
> @@ -3118,7 +3118,7 @@ int i915_gpu_idle(struct drm_device *dev)
>   				return ret;
>   			}
>
> -			ret = i915_add_request_no_flush(req->ring);
> +			ret = i915_add_request_no_flush(req);
>   			if (ret) {
>   				i915_gem_request_unreference(req);
>   				return ret;
> @@ -3966,7 +3966,7 @@ i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj,
>   			if (ret)
>   				return ret;
>
> -			ret = i915_add_request_no_flush(req->ring);
> +			ret = i915_add_request_no_flush(req);
>   			if (ret)
>   				return ret;
>   		}
> @@ -4884,7 +4884,7 @@ i915_gem_init_hw(struct drm_device *dev)
>   			return ret;
>   		}
>
> -		ret = i915_add_request_no_flush(ring);
> +		ret = i915_add_request_no_flush(req);
>   		if (ret) {
>   			DRM_ERROR("Add request ring #%d failed: %d\n", i, ret);
>   			i915_gem_request_unreference(req);
> diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
> index 1e2fc80..15e33a9 100644
> --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
> +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
> @@ -996,7 +996,7 @@ i915_gem_execbuffer_retire_commands(struct i915_execbuffer_params *params)
>   	params->ring->gpu_caches_dirty = true;
>
>   	/* Add a breadcrumb for the completion of the batch buffer */
> -	return __i915_add_request(params->ring, params->file,
> +	return __i915_add_request(params->request, params->file,
>   				  params->batch_obj, true);
>   }
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index c32bc0c..9cbfb93 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -9840,7 +9840,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
>
>   		i915_gem_request_assign(&work->flip_queued_req, request);
>
> -		ret = i915_add_request_no_flush(request->ring);
> +		ret = i915_add_request_no_flush(request);
>   		if (ret)
>   			goto cleanup_request_assign;
>   	}
> diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
> index f0bb98a..3b4393c 100644
> --- a/drivers/gpu/drm/i915/intel_lrc.c
> +++ b/drivers/gpu/drm/i915/intel_lrc.c
> @@ -1942,7 +1942,7 @@ int intel_lr_context_deferred_create(struct intel_context *ctx,
>   				goto error;
>   			}
>
> -			ret = i915_add_request_no_flush(req->ring);
> +			ret = i915_add_request_no_flush(req);
>   			if (ret) {
>   				DRM_ERROR("ring init context: %d\n", ret);
>   				i915_gem_request_unreference(req);
> diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c
> index dc209bf..228c9d1 100644
> --- a/drivers/gpu/drm/i915/intel_overlay.c
> +++ b/drivers/gpu/drm/i915/intel_overlay.c
> @@ -217,7 +217,7 @@ static int intel_overlay_do_wait_request(struct intel_overlay *overlay,
>
>   	BUG_ON(overlay->last_flip_req);
>   	i915_gem_request_assign(&overlay->last_flip_req, req);
> -	ret = i915_add_request(req->ring);
> +	ret = i915_add_request(req);
>   	if (ret) {
>   		i915_gem_request_unreference(req);
>   		return ret;
> @@ -304,7 +304,7 @@ static int intel_overlay_continue(struct intel_overlay *overlay,
>
>   	WARN_ON(overlay->last_flip_req);
>   	i915_gem_request_assign(&overlay->last_flip_req, req);
> -	ret = i915_add_request(req->ring);
> +	ret = i915_add_request(req);
>   	if (ret)
>   		i915_gem_request_unreference(req);
>
> diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
> index 18d12a5..508d7d8 100644
> --- a/drivers/gpu/drm/i915/intel_ringbuffer.c
> +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
> @@ -2145,8 +2145,9 @@ int intel_ring_idle(struct intel_engine_cs *ring)
>   	int ret;
>
>   	/* We need to add any requests required to flush the objects and ring */
> +	WARN_ON(ring->outstanding_lazy_request);
>   	if (ring->outstanding_lazy_request) {
> -		ret = i915_add_request(ring);
> +		ret = i915_add_request(ring->outstanding_lazy_request);
>   		if (ret)
>   			return ret;
>   	}
>

Reviewed-by: Tomas Elf <tomas.elf@intel.com>

Thanks,
Tomas

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