drm/i915: Rename intel_engine_cs struct members

below and a couple manual fixups.

@@
identifier I, J;
@@
struct I {
...
- struct intel_engine_cs *J;
+ struct intel_engine_cs *engine;
...
}
@@
identifier I, J;
@@
struct I {
...
- struct intel_engine_cs J;
+ struct intel_engine_cs engine;
...
}
@@
struct drm_i915_private *d;
@@
(
- d->ring
+ d->engine
)
@@
struct i915_execbuffer_params *p;
@@
(
- p->ring
+ p->engine
)
@@
struct intel_ringbuffer *r;
@@
(
- r->ring
+ r->engine
)
@@
struct drm_i915_gem_request *req;
@@
(
- req->ring
+ req->engine
)

v2: Script missed the tracepoint code - fixed up by hand.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 44f5829..6c325e4 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -346,7 +346,7 @@
 	}
 
 	for (i = 0; i < I915_NUM_RINGS; i++) {
-		struct intel_engine_cs *engine = &dev_priv->ring[i];
+		struct intel_engine_cs *engine = &dev_priv->engine[i];
 
 		if (engine->last_context) {
 			i915_gem_context_unpin(engine->last_context, engine);
@@ -421,13 +421,13 @@
 		 * to default context. So we need to unreference the base object once
 		 * to offset the do_switch part, so that i915_gem_context_unreference()
 		 * can then free the base object correctly. */
-		WARN_ON(!dev_priv->ring[RCS].last_context);
+		WARN_ON(!dev_priv->engine[RCS].last_context);
 
 		i915_gem_object_ggtt_unpin(dctx->legacy_hw_ctx.rcs_state);
 	}
 
 	for (i = I915_NUM_RINGS; --i >= 0;) {
-		struct intel_engine_cs *engine = &dev_priv->ring[i];
+		struct intel_engine_cs *engine = &dev_priv->engine[i];
 
 		if (engine->last_context) {
 			i915_gem_context_unpin(engine->last_context, engine);
@@ -441,7 +441,7 @@
 
 int i915_gem_context_enable(struct drm_i915_gem_request *req)
 {
-	struct intel_engine_cs *engine = req->ring;
+	struct intel_engine_cs *engine = req->engine;
 	int ret;
 
 	if (i915.enable_execlists) {
@@ -510,7 +510,7 @@
 static inline int
 mi_set_context(struct drm_i915_gem_request *req, u32 hw_flags)
 {
-	struct intel_engine_cs *engine = req->ring;
+	struct intel_engine_cs *engine = req->engine;
 	u32 flags = hw_flags | MI_MM_SPACE_GTT;
 	const int num_rings =
 		/* Use an extended w/a on ivb+ if signalling from other rings */
@@ -625,7 +625,7 @@
 	if (INTEL_INFO(engine->dev)->gen < 8)
 		return true;
 
-	if (engine != &dev_priv->ring[RCS])
+	if (engine != &dev_priv->engine[RCS])
 		return true;
 
 	return false;
@@ -643,7 +643,7 @@
 	if (!IS_GEN8(engine->dev))
 		return false;
 
-	if (engine != &dev_priv->ring[RCS])
+	if (engine != &dev_priv->engine[RCS])
 		return false;
 
 	if (hw_flags & MI_RESTORE_INHIBIT)
@@ -655,14 +655,14 @@
 static int do_switch(struct drm_i915_gem_request *req)
 {
 	struct intel_context *to = req->ctx;
-	struct intel_engine_cs *engine = req->ring;
+	struct intel_engine_cs *engine = req->engine;
 	struct drm_i915_private *dev_priv = engine->dev->dev_private;
 	struct intel_context *from = engine->last_context;
 	u32 hw_flags = 0;
 	bool uninitialized = false;
 	int ret, i;
 
-	if (from != NULL && engine == &dev_priv->ring[RCS]) {
+	if (from != NULL && engine == &dev_priv->engine[RCS]) {
 		BUG_ON(from->legacy_hw_ctx.rcs_state == NULL);
 		BUG_ON(!i915_gem_obj_is_pinned(from->legacy_hw_ctx.rcs_state));
 	}
@@ -671,7 +671,7 @@
 		return 0;
 
 	/* Trying to pin first makes error handling easier. */
-	if (engine == &dev_priv->ring[RCS]) {
+	if (engine == &dev_priv->engine[RCS]) {
 		ret = i915_gem_obj_ggtt_pin(to->legacy_hw_ctx.rcs_state,
 					    get_context_alignment(engine->dev),
 					    0);
@@ -700,7 +700,7 @@
 		to->ppgtt->pd_dirty_rings &= ~intel_ring_flag(engine);
 	}
 
-	if (engine != &dev_priv->ring[RCS]) {
+	if (engine != &dev_priv->engine[RCS]) {
 		if (from)
 			i915_gem_context_unreference(from);
 		goto done;
@@ -828,7 +828,7 @@
  */
 int i915_switch_context(struct drm_i915_gem_request *req)
 {
-	struct intel_engine_cs *engine = req->ring;
+	struct intel_engine_cs *engine = req->engine;
 	struct drm_i915_private *dev_priv = engine->dev->dev_private;
 
 	WARN_ON(i915.enable_execlists);