drivers/iommu/mtk_iommu.h

   1 /*
   2  * Copyright (c) 2015-2016 MediaTek Inc.
   3  * Author: Honghui Zhang <honghui.zhang@mediatek.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #ifndef _MTK_IOMMU_H_
  16 #define _MTK_IOMMU_H_
  17
  18 #include <linux/clk.h>
  19 #include <linux/component.h>
  20 #include <linux/device.h>
  21 #include <linux/io.h>
  22 #include <linux/iommu.h>
  23 #include <linux/list.h>
  24 #include <linux/spinlock.h>
  25 #include <soc/mediatek/smi.h>
  26
  27 #include "io-pgtable.h"
  28
  29 struct mtk_iommu_suspend_reg {
  30         u32                             standard_axi_mode;
  31         u32                             dcm_dis;
  32         u32                             ctrl_reg;
  33         u32                             int_control0;
  34         u32                             int_main_control;
  35 };
  36
  37 struct mtk_iommu_client_priv {
  38         struct list_head                client;
  39         unsigned int                    mtk_m4u_id;
  40         struct device                   *m4udev;
  41 };
  42
  43 struct mtk_iommu_domain;
  44
  45 struct mtk_iommu_data {
  46         void __iomem                    *base;
  47         int                             irq;
  48         struct device                   *dev;
  49         struct clk                      *bclk;
  50         phys_addr_t                     protect_base; /* protect memory base */
  51         struct mtk_iommu_suspend_reg    reg;
  52         struct mtk_iommu_domain         *m4u_dom;
  53         struct iommu_group              *m4u_group;
  54         struct mtk_smi_iommu            smi_imu;      /* SMI larb iommu info */
  55         bool                            enable_4GB;
  56 };
  57
  58 static int compare_of(struct device *dev, void *data)
  59 {
  60         return dev->of_node == data;
  61 }
  62
  63 static int mtk_iommu_bind(struct device *dev)
  64 {
  65         struct mtk_iommu_data *data = dev_get_drvdata(dev);
  66
  67         return component_bind_all(dev, &data->smi_imu);
  68 }
  69
  70 static void mtk_iommu_unbind(struct device *dev)
  71 {
  72         struct mtk_iommu_data *data = dev_get_drvdata(dev);
  73
  74         component_unbind_all(dev, &data->smi_imu);
  75 }
  76
  77 #endif