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/* 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
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