1 files changed, 91 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c b/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c
new file mode 100644
index 000000000000..545f79eb0cc5
--- /dev/null
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c
@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+
+#include <linux/debugfs.h>
+#include <linux/string_helpers.h>
+
+#include <drm/drm_print.h>
+
+#include "gt/intel_gt_debugfs.h"
+
+#include "i915_drv.h"
+
+#include "intel_pxp.h"
+#include "intel_pxp_debugfs.h"
+#include "intel_pxp_gsccs.h"
+#include "intel_pxp_irq.h"
+#include "intel_pxp_types.h"
+
+static int pxp_info_show(struct seq_file *m, void *data)
+{
+	struct intel_pxp *pxp = m->private;
+	struct drm_printer p = drm_seq_file_printer(m);
+
+	if (!intel_pxp_is_enabled(pxp)) {
+		drm_printf(&p, "pxp disabled\n");
+		return 0;
+	}
+
+	drm_printf(&p, "active: %s\n", str_yes_no(intel_pxp_is_active(pxp)));
+	drm_printf(&p, "instance counter: %u\n", pxp->key_instance);
+
+	return 0;
+}
+
+DEFINE_SHOW_ATTRIBUTE(pxp_info);
+
+static int pxp_terminate_get(void *data, u64 *val)
+{
+	/* nothing to read */
+	return -EPERM;
+}
+
+static int pxp_terminate_set(void *data, u64 val)
+{
+	struct intel_pxp *pxp = data;
+	struct intel_gt *gt = pxp->ctrl_gt;
+	int timeout_ms;
+
+	if (!intel_pxp_is_active(pxp))
+		return -ENODEV;
+
+	/* simulate a termination interrupt */
+	spin_lock_irq(gt->irq_lock);
+	intel_pxp_irq_handler(pxp, GEN12_DISPLAY_PXP_STATE_TERMINATED_INTERRUPT);
+	spin_unlock_irq(gt->irq_lock);
+
+	timeout_ms = intel_pxp_get_backend_timeout_ms(pxp);
+
+	if (!wait_for_completion_timeout(&pxp->termination,
+					 msecs_to_jiffies(timeout_ms)))
+		return -ETIMEDOUT;
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(pxp_terminate_fops, pxp_terminate_get, pxp_terminate_set, "%llx\n");
+
+void intel_pxp_debugfs_register(struct intel_pxp *pxp)
+{
+	struct dentry *debugfs_root;
+	struct dentry *pxproot;
+
+	if (!intel_pxp_is_supported(pxp))
+		return;
+
+	debugfs_root = pxp->ctrl_gt->i915->drm.debugfs_root;
+	if (!debugfs_root)
+		return;
+
+	pxproot = debugfs_create_dir("pxp", debugfs_root);
+	if (IS_ERR(pxproot))
+		return;
+
+	debugfs_create_file("info", 0444, pxproot,
+			    pxp, &pxp_info_fops);
+
+	debugfs_create_file("terminate_state", 0644, pxproot,
+			    pxp, &pxp_terminate_fops);
+}