/* SPDX-License-Identifier: GPL-2.0-only */ /* * Intel MIC Platform Software Stack (MPSS) * * Copyright(c) 2013 Intel Corporation. * * Intel MIC Host driver. */ #ifndef MIC_SMPT_H #define MIC_SMPT_H /** * struct mic_smpt_ops - MIC HW specific SMPT operations. * @init: Initialize hardware specific SMPT information in mic_smpt_hw_info. * @set: Set the value for a particular SMPT entry. */ struct mic_smpt_ops { void (*init)(struct mic_device *mdev); void (*set)(struct mic_device *mdev, dma_addr_t dma_addr, u8 index); }; /** * struct mic_smpt - MIC SMPT entry information. * @dma_addr: Base DMA address for this SMPT entry. * @ref_count: Number of active mappings for this SMPT entry in bytes. */ struct mic_smpt { dma_addr_t dma_addr; s64 ref_count; }; /** * struct mic_smpt_hw_info - MIC SMPT hardware specific information. * @num_reg: Number of SMPT registers. * @page_shift: System memory page shift. * @page_size: System memory page size. * @base: System address base. */ struct mic_smpt_hw_info { u8 num_reg; u8 page_shift; u64 page_size; u64 base; }; /** * struct mic_smpt_info - MIC SMPT information. * @entry: Array of SMPT entries. * @smpt_lock: Spin lock protecting access to SMPT data structures. * @info: Hardware specific SMPT information. * @ref_count: Number of active SMPT mappings (for debug). * @map_count: Number of SMPT mappings created (for debug). * @unmap_count: Number of SMPT mappings destroyed (for debug). */ struct mic_smpt_info { struct mic_smpt *entry; spinlock_t smpt_lock; struct mic_smpt_hw_info info; s64 ref_count; s64 map_count; s64 unmap_count; }; dma_addr_t mic_map_single(struct mic_device *mdev, void *va, size_t size); void mic_unmap_single(struct mic_device *mdev, dma_addr_t mic_addr, size_t size); dma_addr_t mic_map(struct mic_device *mdev, dma_addr_t dma_addr, size_t size); void mic_unmap(struct mic_device *mdev, dma_addr_t mic_addr, size_t size); dma_addr_t mic_to_dma_addr(struct mic_device *mdev, dma_addr_t mic_addr); /** * mic_map_error - Check a MIC address for errors. * * @mdev: pointer to mic_device instance. * * returns Whether there was an error during mic_map..(..) APIs. */ static inline bool mic_map_error(dma_addr_t mic_addr) { return !mic_addr; } int mic_smpt_init(struct mic_device *mdev); void mic_smpt_uninit(struct mic_device *mdev); void mic_smpt_restore(struct mic_device *mdev); #endif