drm/i915: Move engine->needs_cmd_parser to engine->flags

Will be adding a new per-engine flags shortly so it makes sense
to consolidate.

v2: Keep the original code flow in intel_engine_cleanup_cmd_parser.
    (Joonas Lahtinen)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171129082409.18189-1-tvrtko.ursulin@linux.intel.com

drivers/gpu/drm/i915/i915_cmd_parser.c

@@ -26,6 +26,7 @@
  */
 
 #include "i915_drv.h"
+#include "intel_ringbuffer.h"
 
 /**
  * DOC: batch buffer command parser
@@ -940,7 +941,7 @@ void intel_engine_init_cmd_parser(struct intel_engine_cs *engine)
 		return;
 	}
 
-	engine->needs_cmd_parser = true;
+	engine->flags |= I915_ENGINE_NEEDS_CMD_PARSER;
 }
 
 /**
@@ -952,7 +953,7 @@ void intel_engine_init_cmd_parser(struct intel_engine_cs *engine)
  */
 void intel_engine_cleanup_cmd_parser(struct intel_engine_cs *engine)
 {
-	if (!engine->needs_cmd_parser)
+	if (!intel_engine_needs_cmd_parser(engine))
 		return;
 
 	fini_hash_table(engine);
@@ -1350,7 +1351,7 @@ int i915_cmd_parser_get_version(struct drm_i915_private *dev_priv)
 
 	/* If the command parser is not enabled, report 0 - unsupported */
 	for_each_engine(engine, dev_priv, id) {
-		if (engine->needs_cmd_parser) {
+		if (intel_engine_needs_cmd_parser(engine)) {
 			active = true;
 			break;
 		}

drivers/gpu/drm/i915/i915_gem_execbuffer.c

@@ -271,7 +271,7 @@ static inline u64 gen8_noncanonical_addr(u64 address)
 
 static inline bool eb_use_cmdparser(const struct i915_execbuffer *eb)
 {
-	return eb->engine->needs_cmd_parser && eb->batch_len;
+	return intel_engine_needs_cmd_parser(eb->engine) && eb->batch_len;
 }
 
 static int eb_create(struct i915_execbuffer *eb)

drivers/gpu/drm/i915/intel_ringbuffer.h

@@ -538,7 +538,8 @@ struct intel_engine_cs {
 
 	struct intel_engine_hangcheck hangcheck;
 
-	bool needs_cmd_parser;
+#define I915_ENGINE_NEEDS_CMD_PARSER BIT(0)
+	unsigned int flags;
 
 	/*
 	 * Table of commands the command parser needs to know about
@@ -597,6 +598,11 @@ struct intel_engine_cs {
 	} stats;
 };
 
+static inline bool intel_engine_needs_cmd_parser(struct intel_engine_cs *engine)
+{
+	return engine->flags & I915_ENGINE_NEEDS_CMD_PARSER;
+}
+
 static inline void
 execlists_set_active(struct intel_engine_execlists *execlists,
 		     unsigned int bit)