[Intel-gfx] [PATCH 03/53] drm/i915: Add a dev pointer to the context

[oscar.mateo at intel.com]

From: Oscar Mateo <oscar.mateo at intel.com>

Without this, i915_gem_context_free looks obfuscated. But, also, it
gives me the possibility to know which kind of context I am dealing
with at freeing time (at this point we only have fake and legacy hw
contexts, but soon we will have logical ring contexts as well).

Signed-off-by: Oscar Mateo <oscar.mateo at intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h         |  1 +
 drivers/gpu/drm/i915/i915_gem_context.c | 21 +++++++++++----------
 2 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 1cebbd4..ec7e352 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -586,6 +586,7 @@ struct i915_ctx_hang_stats {
 /* This must match up with the value previously used for execbuf2.rsvd1. */
 #define DEFAULT_CONTEXT_ID 0
 struct intel_context {
+	struct drm_device *dev;
 	struct kref ref;
 	int id;
 	bool is_initialized;
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index f27886a..f6c2538 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -178,22 +178,21 @@ static int get_context_size(struct drm_device *dev)
 
 void i915_gem_context_free(struct kref *ctx_ref)
 {
-	struct intel_context *ctx = container_of(ctx_ref,
-						   typeof(*ctx), ref);
-	struct i915_hw_ppgtt *ppgtt = NULL;
+	struct intel_context *ctx = container_of(ctx_ref, typeof(*ctx), ref);
+	struct drm_device *dev = ctx->dev;
 
 	if (ctx->render_obj) {
-		/* We refcount even the aliasing PPGTT to keep the code symmetric */
-		if (USES_PPGTT(ctx->render_obj->base.dev))
-			ppgtt = ctx_to_ppgtt(ctx);
-
 		/* XXX: Free up the object before tearing down the address space, in
 		 * case we're bound in the PPGTT */
 		drm_gem_object_unreference(&ctx->render_obj->base);
 	}
 
-	if (ppgtt)
+	/* We refcount even the aliasing PPGTT to keep the code symmetric */
+	if (USES_PPGTT(dev)) {
+		struct i915_hw_ppgtt *ppgtt = ctx_to_ppgtt(ctx);
 		kref_put(&ppgtt->ref, ppgtt_release);
+	}
+
 	list_del(&ctx->link);
 	kfree(ctx);
 }
@@ -229,8 +228,9 @@ i915_gem_alloc_context_obj(struct drm_device *dev, size_t size)
 }
 
 static struct i915_hw_ppgtt *
-create_vm_for_ctx(struct drm_device *dev, struct intel_context *ctx)
+create_vm_for_ctx(struct intel_context *ctx)
 {
+	struct drm_device *dev = ctx->dev;
 	struct i915_hw_ppgtt *ppgtt;
 	int ret;
 
@@ -282,6 +282,7 @@ __create_hw_context(struct drm_device *dev,
 	} else
 		ret = DEFAULT_CONTEXT_ID;
 
+	ctx->dev = dev;
 	ctx->file_priv = file_priv;
 	ctx->id = ret;
 	/* NB: Mark all slices as needing a remap so that when the context first
@@ -334,7 +335,7 @@ i915_gem_create_context(struct drm_device *dev,
 	}
 
 	if (create_vm) {
-		struct i915_hw_ppgtt *ppgtt = create_vm_for_ctx(dev, ctx);
+		struct i915_hw_ppgtt *ppgtt = create_vm_for_ctx(ctx);
 
 		if (IS_ERR_OR_NULL(ppgtt)) {
 			DRM_DEBUG_DRIVER("PPGTT setup failed (%ld)\n",
-- 
1.9.0