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Commit 27606fd8 authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915/execlists: Split insert_request() 



In the next patch we will want to reinsert a request not at the end of
the priority queue, but at the front. Here we split insert_request()
into two, the first function retrieves the priority list (for reuse for
unsubmit later) and a wrapper function to insert at the end of that list
and to schedule the tasklet if we were first.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: default avatarMichał Winiarski <michal.winiarski@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170916204414.32762-3-chris@chris-wilson.co.uk
parent 08dd3e1a

drivers/gpu/drm/i915/intel_lrc.c

+19 −16
Original line number Diff line number Diff line
@@ -286,8 +286,8 @@ intel_lr_context_descriptor_update(struct i915_gem_context *ctx, 
	ce->lrc_desc = desc;

}



static bool

insert_request(struct intel_engine_cs *engine,

static struct i915_priolist *

lookup_priolist(struct intel_engine_cs *engine,

		struct i915_priotree *pt,

		int prio)

{
@@ -311,8 +311,7 @@ insert_request(struct intel_engine_cs *engine, 
			parent = &rb->rb_right;

			first = false;

		} else {

			list_add_tail(&pt->link, &p->requests);

			return false;

			return p;

		}

	}
@@ -338,16 +337,14 @@ insert_request(struct intel_engine_cs *engine, 
	}



	p->priority = prio;

	INIT_LIST_HEAD(&p->requests);

	rb_link_node(&p->node, rb, parent);

	rb_insert_color(&p->node, &engine->execlist_queue);



	INIT_LIST_HEAD(&p->requests);

	list_add_tail(&pt->link, &p->requests);



	if (first)

		engine->execlist_first = &p->node;



	return first;

	return ptr_pack_bits(p, first, 1);

}



static inline void
@@ -764,6 +761,17 @@ static void intel_lrc_irq_handler(unsigned long data) 
	intel_uncore_forcewake_put(dev_priv, engine->fw_domains);

}



static void insert_request(struct intel_engine_cs *engine,

			   struct i915_priotree *pt,

			   int prio)

{

	struct i915_priolist *p = lookup_priolist(engine, pt, prio);



	list_add_tail(&pt->link, &ptr_mask_bits(p, 1)->requests);

	if (ptr_unmask_bits(p, 1) && execlists_elsp_ready(engine))

		tasklet_hi_schedule(&engine->irq_tasklet);

}



static void execlists_submit_request(struct drm_i915_gem_request *request)

{

	struct intel_engine_cs *engine = request->engine;
@@ -772,12 +780,7 @@ static void execlists_submit_request(struct drm_i915_gem_request *request) 
	/* Will be called from irq-context when using foreign fences. */

	spin_lock_irqsave(&engine->timeline->lock, flags);



	if (insert_request(engine,

			   &request->priotree,

			   request->priotree.priority)) {

		if (execlists_elsp_ready(engine))

			tasklet_hi_schedule(&engine->irq_tasklet);

	}

	insert_request(engine, &request->priotree, request->priotree.priority);



	GEM_BUG_ON(!engine->execlist_first);

	GEM_BUG_ON(list_empty(&request->priotree.link));