[PATCH v3] drm/i915: Add ppgtt create/release trace points

[daniele.ceraolospurio@xxxxxxxxx]

From: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>

These tracepoints are useful for observing the creation and
destruction of Full PPGTTs.

Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
---
 drivers/gpu/drm/i915/i915_gem_gtt.c |  4 ++++
 drivers/gpu/drm/i915/i915_trace.h   | 40 +++++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index be0aa29..5577e86 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -1174,6 +1174,8 @@ i915_ppgtt_create(struct drm_device *dev, struct drm_i915_file_private *fpriv)
 
 	ppgtt->file_priv = fpriv;
 
+	trace_i915_ppgtt_create(ppgtt);
+
 	return ppgtt;
 }
 
@@ -1182,6 +1184,8 @@ void  i915_ppgtt_release(struct kref *kref)
 	struct i915_hw_ppgtt *ppgtt =
 		container_of(kref, struct i915_hw_ppgtt, ref);
 
+	trace_i915_ppgtt_release(ppgtt);
+
 	/* vmas should already be unbound */
 	WARN_ON(!list_empty(&ppgtt->base.active_list));
 	WARN_ON(!list_empty(&ppgtt->base.inactive_list));
diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index f5aa006..ca84c49 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -587,6 +587,46 @@ TRACE_EVENT(intel_gpu_freq_change,
 	    TP_printk("new_freq=%u", __entry->freq)
 );
 
+TRACE_EVENT(i915_ppgtt_create,
+	TP_PROTO(struct i915_hw_ppgtt *ppgtt),
+
+	TP_ARGS(ppgtt),
+
+	TP_STRUCT__entry(
+			__field(struct i915_address_space *, vm)
+			__field(u32, dev)
+			__field(u32, pid)
+	),
+
+	TP_fast_assign(
+			__entry->vm = &ppgtt->base;
+			__entry->dev = ppgtt->base.dev->primary->index;
+			__entry->pid = (unsigned int)task_pid_nr(current);
+	),
+
+	TP_printk("dev=%u, task_pid=%u, vm=%p",
+		  __entry->dev, __entry->pid, __entry->vm)
+);
+
+TRACE_EVENT(i915_ppgtt_release,
+
+	TP_PROTO(struct i915_hw_ppgtt *ppgtt),
+
+	TP_ARGS(ppgtt),
+
+	TP_STRUCT__entry(
+			__field(struct i915_address_space *, vm)
+			__field(u32, dev)
+	),
+
+	TP_fast_assign(
+		__entry->vm = &ppgtt->base;
+		__entry->dev = ppgtt->base.dev->primary->index;
+	),
+
+	TP_printk("dev=%u, vm=%p", __entry->dev, __entry->vm)
+);
+
 #endif /* _I915_TRACE_H_ */
 
 /* This part must be outside protection */
-- 
1.8.5.2

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