| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | /* |
| 3 | * Intel MIC Platform Software Stack (MPSS) |
| 4 | * |
| 5 | * Copyright(c) 2013 Intel Corporation. |
| 6 | * |
| 7 | * Intel MIC Host driver. |
| 8 | */ |
| 9 | #ifndef MIC_SMPT_H |
| 10 | #define MIC_SMPT_H |
| 11 | /** |
| 12 | * struct mic_smpt_ops - MIC HW specific SMPT operations. |
| 13 | * @init: Initialize hardware specific SMPT information in mic_smpt_hw_info. |
| 14 | * @set: Set the value for a particular SMPT entry. |
| 15 | */ |
| 16 | struct mic_smpt_ops { |
| 17 | void (*init)(struct mic_device *mdev); |
| 18 | void (*set)(struct mic_device *mdev, dma_addr_t dma_addr, u8 index); |
| 19 | }; |
| 20 | |
| 21 | /** |
| 22 | * struct mic_smpt - MIC SMPT entry information. |
| 23 | * @dma_addr: Base DMA address for this SMPT entry. |
| 24 | * @ref_count: Number of active mappings for this SMPT entry in bytes. |
| 25 | */ |
| 26 | struct mic_smpt { |
| 27 | dma_addr_t dma_addr; |
| 28 | s64 ref_count; |
| 29 | }; |
| 30 | |
| 31 | /** |
| 32 | * struct mic_smpt_hw_info - MIC SMPT hardware specific information. |
| 33 | * @num_reg: Number of SMPT registers. |
| 34 | * @page_shift: System memory page shift. |
| 35 | * @page_size: System memory page size. |
| 36 | * @base: System address base. |
| 37 | */ |
| 38 | struct mic_smpt_hw_info { |
| 39 | u8 num_reg; |
| 40 | u8 page_shift; |
| 41 | u64 page_size; |
| 42 | u64 base; |
| 43 | }; |
| 44 | |
| 45 | /** |
| 46 | * struct mic_smpt_info - MIC SMPT information. |
| 47 | * @entry: Array of SMPT entries. |
| 48 | * @smpt_lock: Spin lock protecting access to SMPT data structures. |
| 49 | * @info: Hardware specific SMPT information. |
| 50 | * @ref_count: Number of active SMPT mappings (for debug). |
| 51 | * @map_count: Number of SMPT mappings created (for debug). |
| 52 | * @unmap_count: Number of SMPT mappings destroyed (for debug). |
| 53 | */ |
| 54 | struct mic_smpt_info { |
| 55 | struct mic_smpt *entry; |
| 56 | spinlock_t smpt_lock; |
| 57 | struct mic_smpt_hw_info info; |
| 58 | s64 ref_count; |
| 59 | s64 map_count; |
| 60 | s64 unmap_count; |
| 61 | }; |
| 62 | |
| 63 | dma_addr_t mic_map_single(struct mic_device *mdev, void *va, size_t size); |
| 64 | void mic_unmap_single(struct mic_device *mdev, |
| 65 | dma_addr_t mic_addr, size_t size); |
| 66 | dma_addr_t mic_map(struct mic_device *mdev, |
| 67 | dma_addr_t dma_addr, size_t size); |
| 68 | void mic_unmap(struct mic_device *mdev, dma_addr_t mic_addr, size_t size); |
| 69 | dma_addr_t mic_to_dma_addr(struct mic_device *mdev, dma_addr_t mic_addr); |
| 70 | |
| 71 | /** |
| 72 | * mic_map_error - Check a MIC address for errors. |
| 73 | * |
| 74 | * @mdev: pointer to mic_device instance. |
| 75 | * |
| 76 | * returns Whether there was an error during mic_map..(..) APIs. |
| 77 | */ |
| 78 | static inline bool mic_map_error(dma_addr_t mic_addr) |
| 79 | { |
| 80 | return !mic_addr; |
| 81 | } |
| 82 | |
| 83 | int mic_smpt_init(struct mic_device *mdev); |
| 84 | void mic_smpt_uninit(struct mic_device *mdev); |
| 85 | void mic_smpt_restore(struct mic_device *mdev); |
| 86 | |
| 87 | #endif |