Re: [PATCH 2/5] drm/i915: Create a kernel context for GGTT updates

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On 9/7/2023 3:41 PM, Andi Shyti wrote:
Hi Nirmoy,

[...]

+	/* mark the bind context's availability status */
+	bool bind_context_ready;
Do we need some locking here?

bind_context_ready is changed in suspend/resume or after mod probe so no need to
worry about locking here.



  	/**
  	 * pinned_contexts_list: List of pinned contexts. This list is only
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
index 449f0b7fc843..cd0ff1597db9 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt.c
@@ -1019,3 +1019,21 @@ enum i915_map_type intel_gt_coherent_map_type(struct intel_gt *gt,
  	else
  		return I915_MAP_WC;
  }
+
+void intel_gt_bind_context_set_ready(struct intel_gt *gt, bool ready)
+{
+	struct intel_engine_cs *engine = gt->engine[BCS0];
+
+	if (engine && engine->bind_context)
+		engine->bind_context_ready = ready;
+}
+
+bool intel_gt_is_bind_context_ready(struct intel_gt *gt)
+{
+	struct intel_engine_cs *engine = gt->engine[BCS0];
+
+	if (engine)
+		return engine->bind_context_ready;
+
+	return false;
+}
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.h b/drivers/gpu/drm/i915/gt/intel_gt.h
index 239848bcb2a4..9e70e625cebc 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt.h
@@ -180,4 +180,6 @@ enum i915_map_type intel_gt_coherent_map_type(struct intel_gt *gt,
  					      struct drm_i915_gem_object *obj,
  					      bool always_coherent);
+void intel_gt_bind_context_set_ready(struct intel_gt *gt, bool ready);
+bool intel_gt_is_bind_context_ready(struct intel_gt *gt);
Can you put all this part in patch 4 or make it a separate patch?


This patch contains the new member intel_engine_cs->bind_context_ready which is why I added these two function in this.

Probably it makes sense to move only i915_ggtt_require_binder() out of this patch ?


Regards,

Nirmoy


Andi



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