1/* SPDX-License-Identifier: GPL-2.0-only */
  2/*
  3 * Copyright (c) 2015-2016 MediaTek Inc.
  4 * Author: Honghui Zhang <honghui.zhang@mediatek.com>
  5 */
  6
  7#ifndef _MTK_IOMMU_H_
  8#define _MTK_IOMMU_H_
  9
 10#include <linux/clk.h>
 11#include <linux/component.h>
 12#include <linux/device.h>
 13#include <linux/io.h>
 14#include <linux/io-pgtable.h>
 15#include <linux/iommu.h>
 16#include <linux/list.h>
 17#include <linux/spinlock.h>
 18#include <linux/dma-mapping.h>
 19#include <soc/mediatek/smi.h>
 20
 21#define MTK_LARB_COM_MAX	8
 22#define MTK_LARB_SUBCOM_MAX	4
 23
 24struct mtk_iommu_suspend_reg {
 25	union {
 26		u32			standard_axi_mode;/* v1 */
 27		u32			misc_ctrl;/* v2 */
 28	};
 29	u32				dcm_dis;
 30	u32				ctrl_reg;
 31	u32				int_control0;
 32	u32				int_main_control;
 33	u32				ivrp_paddr;
 34	u32				vld_pa_rng;
 35	u32				wr_len_ctrl;
 36};
 37
 38enum mtk_iommu_plat {
 39	M4U_MT2701,
 40	M4U_MT2712,
 41	M4U_MT6779,
 42	M4U_MT8173,
 43	M4U_MT8183,
 44};
 45
 46struct mtk_iommu_plat_data {
 47	enum mtk_iommu_plat m4u_plat;
 48	u32                 flags;
 49	u32                 inv_sel_reg;
 50	unsigned char       larbid_remap[MTK_LARB_COM_MAX][MTK_LARB_SUBCOM_MAX];
 51};
 52
 53struct mtk_iommu_domain;
 54
 55struct mtk_iommu_data {
 56	void __iomem			*base;
 57	int				irq;
 58	struct device			*dev;
 59	struct clk			*bclk;
 60	phys_addr_t			protect_base; /* protect memory base */
 61	struct mtk_iommu_suspend_reg	reg;
 62	struct mtk_iommu_domain		*m4u_dom;
 63	struct iommu_group		*m4u_group;
 64	bool                            enable_4GB;
 65	spinlock_t			tlb_lock; /* lock for tlb range flush */
 66
 67	struct iommu_device		iommu;
 68	const struct mtk_iommu_plat_data *plat_data;
 69
 70	struct dma_iommu_mapping	*mapping; /* For mtk_iommu_v1.c */
 71
 72	struct list_head		list;
 73	struct mtk_smi_larb_iommu	larb_imu[MTK_LARB_NR_MAX];
 74};
 75
 76static inline int compare_of(struct device *dev, void *data)
 77{
 78	return dev->of_node == data;
 79}
 80
 81static inline void release_of(struct device *dev, void *data)
 82{
 83	of_node_put(data);
 84}
 85
 86static inline int mtk_iommu_bind(struct device *dev)
 87{
 88	struct mtk_iommu_data *data = dev_get_drvdata(dev);
 89
 90	return component_bind_all(dev, &data->larb_imu);
 91}
 92
 93static inline void mtk_iommu_unbind(struct device *dev)
 94{
 95	struct mtk_iommu_data *data = dev_get_drvdata(dev);
 96
 97	component_unbind_all(dev, &data->larb_imu);
 98}
 99
100#endif