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