[RFC-v2 20/26] drm/i915/pxp: Add i915 trace logs for PXP operations

["Huang, Sean Z" <sean.z.huang@xxxxxxxxx>]

Add several i915 trace logs for PXP calls for debugging or
performance measurement, including:
(1) PXP ioctl
(2) PXP teardown callbacks

To trun on this feature, we need to set
"CONFIG_DRM_I915_LOW_LEVEL_TRACEPOINTS=y" in .config for compiling
the Linux kernel.

Signed-off-by: Huang, Sean Z <sean.z.huang@xxxxxxxxx>
---
 drivers/gpu/drm/i915/i915_trace.h    | 44 ++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/pxp/intel_pxp.c |  6 ++++
 2 files changed, 50 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index a4addcc64978..36470e20dc61 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -1031,6 +1031,50 @@ DEFINE_EVENT(i915_context, i915_context_free,
 	TP_ARGS(ctx)
 );
 
+TRACE_EVENT(i915_pxp_ops_ioctl,
+	    TP_PROTO(struct drm_device *dev, void *data, struct drm_file *file, u32 action),
+	    TP_ARGS(dev, data, file, action),
+
+	    TP_STRUCT__entry(
+			     __field(struct drm_device *, dev)
+			     __field(void *, data)
+			     __field(struct drm_file *, file)
+			     __field(u32, action)
+	    ),
+
+	    TP_fast_assign(
+			   __entry->dev = dev;
+			   __entry->data = data;
+			   __entry->file = file;
+			   __entry->action = action;
+	    ),
+
+	    TP_printk("dev=%p, data=%p, file=%p, action=%u",
+		      __entry->dev, __entry->data, __entry->file, __entry->action)
+);
+
+TRACE_EVENT(i915_pxp_teardown_required_callback,
+	    TP_PROTO(bool global_state_attacked),
+	    TP_ARGS(global_state_attacked),
+
+	    TP_STRUCT__entry(__field(bool, global_state_attacked)),
+
+	    TP_fast_assign(__entry->global_state_attacked = global_state_attacked;),
+
+	    TP_printk("global_state_attacked=%s", yesno(__entry->global_state_attacked))
+);
+
+TRACE_EVENT(i915_pxp_global_terminate_complete_callback,
+	    TP_PROTO(bool global_state_attacked),
+	    TP_ARGS(global_state_attacked),
+
+	    TP_STRUCT__entry(__field(bool, global_state_attacked)),
+
+	    TP_fast_assign(__entry->global_state_attacked = global_state_attacked;),
+
+	    TP_printk("global_state_attacked=%s", yesno(__entry->global_state_attacked))
+);
+
 #endif /* _I915_TRACE_H_ */
 
 /* This part must be outside protection */
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp.c b/drivers/gpu/drm/i915/pxp/intel_pxp.c
index 80949f1bbe59..d5e79beca0d3 100644
--- a/drivers/gpu/drm/i915/pxp/intel_pxp.c
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp.c
@@ -8,6 +8,7 @@
 #include "intel_pxp_context.h"
 #include "intel_pxp_sm.h"
 #include "intel_pxp_tee.h"
+#include "i915_trace.h"
 
 int i915_pxp_ops_ioctl(struct drm_device *dev, void *data, struct drm_file *drmfile)
 {
@@ -22,6 +23,8 @@ int i915_pxp_ops_ioctl(struct drm_device *dev, void *data, struct drm_file *drmf
 	if (copy_from_user(&pxp_info, pxp_ops->info_ptr, sizeof(pxp_info)) != 0)
 		return -EFAULT;
 
+	trace_i915_pxp_ops_ioctl(dev, data, drmfile, pxp_info.action);
+
 	mutex_lock(&i915->pxp.ctx->ctx_mutex);
 
 	if (i915->pxp.ctx->global_state_in_suspend) {
@@ -197,6 +200,8 @@ static int intel_pxp_teardown_required_callback(struct drm_i915_private *i915)
 
 	mutex_unlock(&i915->pxp.ctx->ctx_mutex);
 
+	trace_i915_pxp_teardown_required_callback(i915->pxp.ctx->global_state_attacked);
+
 	return ret;
 }
 
@@ -219,6 +224,7 @@ static int intel_pxp_global_terminate_complete_callback(struct drm_i915_private
 end:
 	mutex_unlock(&i915->pxp.ctx->ctx_mutex);
 
+	trace_i915_pxp_global_terminate_complete_callback(i915->pxp.ctx->global_state_attacked);
 	return ret;
 }
 
-- 
2.17.1

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