1 files changed, 83 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/pxp/intel_pxp_types.h b/drivers/gpu/drm/i915/pxp/intel_pxp_types.h
new file mode 100644
index 000000000000..73ef7d1754e1
--- /dev/null
+++ b/drivers/gpu/drm/i915/pxp/intel_pxp_types.h
@@ -0,0 +1,83 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright(c) 2020, Intel Corporation. All rights reserved.
+ */
+
+#ifndef __INTEL_PXP_TYPES_H__
+#define __INTEL_PXP_TYPES_H__
+
+#include <linux/completion.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/workqueue.h>
+
+struct intel_context;
+struct i915_pxp_component;
+
+/**
+ * struct intel_pxp - pxp state
+ */
+struct intel_pxp {
+	/**
+	 * @pxp_component: i915_pxp_component struct of the bound mei_pxp
+	 * module. Only set and cleared inside component bind/unbind functions,
+	 * which are protected by &tee_mutex.
+	 */
+	struct i915_pxp_component *pxp_component;
+	/**
+	 * @pxp_component_added: track if the pxp component has been added.
+	 * Set and cleared in tee init and fini functions respectively.
+	 */
+	bool pxp_component_added;
+
+	/** @ce: kernel-owned context used for PXP operations */
+	struct intel_context *ce;
+
+	/** @arb_mutex: protects arb session start */
+	struct mutex arb_mutex;
+	/**
+	 * @arb_is_valid: tracks arb session status.
+	 * After a teardown, the arb session can still be in play on the HW
+	 * even if the keys are gone, so we can't rely on the HW state of the
+	 * session to know if it's valid and need to track the status in SW.
+	 */
+	bool arb_is_valid;
+
+	/**
+	 * @key_instance: tracks which key instance we're on, so we can use it
+	 * to determine if an object was created using the current key or a
+	 * previous one.
+	 */
+	u32 key_instance;
+
+	/** @tee_mutex: protects the tee channel binding and messaging. */
+	struct mutex tee_mutex;
+
+	/**
+	 * @hw_state_invalidated: if the HW perceives an attack on the integrity
+	 * of the encryption it will invalidate the keys and expect SW to
+	 * re-initialize the session. We keep track of this state to make sure
+	 * we only re-start the arb session when required.
+	 */
+	bool hw_state_invalidated;
+
+	/** @irq_enabled: tracks the status of the kcr irqs */
+	bool irq_enabled;
+	/**
+	 * @termination: tracks the status of a pending termination. Only
+	 * re-initialized under gt->irq_lock and completed in &session_work.
+	 */
+	struct completion termination;
+
+	/** @session_work: worker that manages session events. */
+	struct work_struct session_work;
+	/** @session_events: pending session events, protected with gt->irq_lock. */
+	u32 session_events;
+#define PXP_TERMINATION_REQUEST  BIT(0)
+#define PXP_TERMINATION_COMPLETE BIT(1)
+#define PXP_INVAL_REQUIRED       BIT(2)
+};
+
+#endif /* __INTEL_PXP_TYPES_H__ */