1 files changed, 63 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_lmtt_types.h b/drivers/gpu/drm/xe/xe_lmtt_types.h
new file mode 100644
index 000000000000..b37abad23416
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_lmtt_types.h
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+
+#ifndef _XE_LMTT_TYPES_H_
+#define _XE_LMTT_TYPES_H_
+
+#include <linux/types.h>
+
+struct xe_bo;
+struct xe_lmtt;
+struct xe_lmtt_pt;
+struct xe_lmtt_ops;
+
+#define LMTT_PTE_INVALID	ULL(0)
+
+/**
+ * struct xe_lmtt - Local Memory Translation Table Manager
+ */
+struct xe_lmtt {
+	/** @pd: root LMTT Directory */
+	struct xe_lmtt_pt *pd;
+
+	/** @ops: LMTT functions */
+	const struct xe_lmtt_ops *ops;
+};
+
+/**
+ * struct xe_lmtt_pt - Local Memory Translation Table Page Table
+ *
+ * Represents single level of the LMTT.
+ */
+struct xe_lmtt_pt {
+	/** @level: page table level, 0 is leaf */
+	unsigned int level;
+
+	/** @bo: buffer object with actual LMTT PTE values */
+	struct xe_bo *bo;
+
+	/** @entries: leaf page tables, exist only for root/non-leaf */
+	struct xe_lmtt_pt *entries[];
+};
+
+/**
+ * struct xe_lmtt_ops - Local Memory Translation Table Operations
+ *
+ * Provides abstraction of the LMTT variants.
+ */
+struct xe_lmtt_ops {
+	/* private: */
+	unsigned int (*lmtt_root_pd_level)(void);
+	unsigned int (*lmtt_pte_num)(unsigned int level);
+	unsigned int (*lmtt_pte_size)(unsigned int level);
+	unsigned int (*lmtt_pte_shift)(unsigned int level);
+	unsigned int (*lmtt_pte_index)(u64 addr, unsigned int level);
+	u64 (*lmtt_pte_encode)(unsigned long offset, unsigned int level);
+};
+
+extern const struct xe_lmtt_ops lmtt_2l_ops;
+extern const struct xe_lmtt_ops lmtt_ml_ops;
+
+#endif