[Intel-gfx] [RFC 1/8] drm/i915/execlists: Refactor out complete_preempt_context()

[jeff.mcgee at intel.com]

From: Chris Wilson <chris at chris-wilson.co.uk>

As a complement to inject_preempt_context(), follow up with the function
to handle its completion. This will be useful should we wish to extend
the duties of the preempt-context for execlists.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Jeff McGee <jeff.mcgee at intel.com>
Cc: Michał Winiarski <michal.winiarski at intel.com>
---
 drivers/gpu/drm/i915/intel_lrc.c | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 53f1c009ed7b..0bfaeb56b8c7 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -531,8 +531,17 @@ static void inject_preempt_context(struct intel_engine_cs *engine)
 	if (execlists->ctrl_reg)
 		writel(EL_CTRL_LOAD, execlists->ctrl_reg);
 
-	execlists_clear_active(&engine->execlists, EXECLISTS_ACTIVE_HWACK);
-	execlists_set_active(&engine->execlists, EXECLISTS_ACTIVE_PREEMPT);
+	execlists_clear_active(execlists, EXECLISTS_ACTIVE_HWACK);
+	execlists_set_active(execlists, EXECLISTS_ACTIVE_PREEMPT);
+}
+
+static void complete_preempt_context(struct intel_engine_execlists *execlists)
+{
+	execlists_cancel_port_requests(execlists);
+	execlists_unwind_incomplete_requests(execlists);
+
+	GEM_BUG_ON(!execlists_is_active(execlists, EXECLISTS_ACTIVE_PREEMPT));
+	execlists_clear_active(execlists, EXECLISTS_ACTIVE_PREEMPT);
 }
 
 static void execlists_dequeue(struct intel_engine_cs *engine)
@@ -939,14 +948,7 @@ static void execlists_submission_tasklet(unsigned long data)
 			if (status & GEN8_CTX_STATUS_COMPLETE &&
 			    buf[2*head + 1] == execlists->preempt_complete_status) {
 				GEM_TRACE("%s preempt-idle\n", engine->name);
-
-				execlists_cancel_port_requests(execlists);
-				execlists_unwind_incomplete_requests(execlists);
-
-				GEM_BUG_ON(!execlists_is_active(execlists,
-								EXECLISTS_ACTIVE_PREEMPT));
-				execlists_clear_active(execlists,
-						       EXECLISTS_ACTIVE_PREEMPT);
+				complete_preempt_context(execlists);
 				continue;
 			}
 
-- 
2.16.2