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/* 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
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