[PATCH 1/3] drm/i915: Add ppgtt init/release trace points

[daniele.ceraolospurio@intel.com]

From: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>

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

Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 drivers/gpu/drm/i915/i915_gem_context.c |  6 +++++
 drivers/gpu/drm/i915/i915_trace.h       | 41 +++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 0d2c75b..99f7022 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -88,6 +88,7 @@
 #include <drm/drmP.h>
 #include <drm/i915_drm.h>
 #include "i915_drv.h"
+#include "i915_trace.h"
 
 /* This is a HW constraint. The value below is the largest known requirement
  * I've seen in a spec to date, and that was a workaround for a non-shipping
@@ -136,6 +137,8 @@ static void ppgtt_release(struct kref *kref)
 	struct i915_hw_ppgtt *ppgtt =
 		container_of(kref, struct i915_hw_ppgtt, ref);
 
+	trace_ppgtt_release(ppgtt);
+
 	do_ppgtt_cleanup(ppgtt);
 	kfree(ppgtt);
 }
@@ -215,6 +218,9 @@ create_vm_for_ctx(struct drm_device *dev, struct intel_context *ctx)
 	}
 
 	ppgtt->ctx = ctx;
+
+	trace_create_vm_for_ctx(ppgtt);
+
 	return ppgtt;
 }
 
diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index f5aa006..9be1421 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -587,6 +587,47 @@ TRACE_EVENT(intel_gpu_freq_change,
 	    TP_printk("new_freq=%u", __entry->freq)
 );
 
+TRACE_EVENT(create_vm_for_ctx,
+
+	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(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