| /* 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 |