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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details the full gnu general public license is included in this distribution in the file called copying extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 39 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141901.397680977@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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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