linux-imx

/*

 * Copyright (C) 2011-2014 NVIDIA CORPORATION.  All rights reserved.

 *

 * 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.

 */

​

#include <linux/bitops.h>

#include <linux/debugfs.h>

#include <linux/err.h>

#include <linux/iommu.h>

#include <linux/kernel.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/platform_device.h>

#include <linux/slab.h>

#include <linux/dma-mapping.h>

​

#include <soc/tegra/ahb.h>

#include <soc/tegra/mc.h>

​

struct tegra_smmu_group {

    struct list_head list;

    const struct tegra_smmu_group_soc *soc;

    struct iommu_group *group;

};

​

struct tegra_smmu {

    void __iomem *regs;

    struct device *dev;

​

    struct tegra_mc *mc;

    const struct tegra_smmu_soc *soc;

​

    struct list_head groups;

​

    unsigned long pfn_mask;

    unsigned long tlb_mask;

​

    unsigned long *asids;

    struct mutex lock;

​

    struct list_head list;

​

    struct dentry *debugfs;

​

    struct iommu_device iommu;  /* IOMMU Core code handle */

};

​

struct tegra_smmu_as {

    struct iommu_domain domain;

    struct tegra_smmu *smmu;

    unsigned int use_count;

    u32 *count;

    struct page **pts;

    struct page *pd;

    dma_addr_t pd_dma;

    unsigned id;

    u32 attr;

};

​

static struct tegra_smmu_as *to_smmu_as(struct iommu_domain *dom)