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/*
* Data structure definition for Rockchip IOMMU driver
*
* 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.
*/
#ifndef __ASM_PLAT_IOMMU_H
#define __ASM_PLAT_IOMMU_H
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/list.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/genalloc.h>
#include <linux/iommu.h>
#include <linux/rockchip-iovmm.h>
struct rk_iovmm {
struct iommu_domain *domain; /* iommu domain for this iovmm */
struct gen_pool *vmm_pool;
struct list_head regions_list; /* list of rk_vm_region */
spinlock_t lock; /* lock for updating regions_list */
};
struct iommu_drvdata {
struct list_head node; /* entry of rk_iommu_domain.clients */
struct device *iommu; /* IOMMU's device descriptor */
struct device *master; /* IOMMU's master device descriptor */
int num_res_mem;
int num_res_irq;
const char *dbgname;
void __iomem **res_bases;
int activations;
spinlock_t data_lock;
struct iommu_domain *domain; /* domain given to iommu_attach_device() */
unsigned int pgtable;
struct rk_iovmm vmm;
rockchip_iommu_fault_handler_t fault_handler;
};
#ifdef CONFIG_RK_IOVMM
#define IOVA_START 0x10000000
#define IOVM_SIZE (SZ_1G - SZ_4K) /* last 4K is for error values */
struct rk_vm_region {
struct list_head node;
unsigned int start;
unsigned int size;
};
static inline struct rk_iovmm *rockchip_get_iovmm(struct device *dev)
{
struct iommu_drvdata *data = dev_get_drvdata(dev->archdata.iommu);
BUG_ON(!dev->archdata.iommu || !data);
return &data->vmm;
}
int rockchip_init_iovmm(struct device *iommu, struct rk_iovmm *vmm);
#else
static inline int rockchip_init_iovmm(struct device *iommu,
struct rk_iovmm *vmm)
{
return -ENOSYS;
}
#endif
#ifdef CONFIG_RK_IOMMU
/**
* rockchip_iommu_tlb_invalidate() - flush all TLB entry in iommu
* @owner: The device whose IOMMU.
*
* This function flush all TLB entry in iommu
*/
int rockchip_iommu_tlb_invalidate(struct device *owner);
int rockchip_iommu_tlb_invalidate_global(struct device *owner);
#else /* CONFIG_RK_IOMMU */
static inline int rockchip_iommu_tlb_invalidate(struct device *owner)
{
return -1;
}
static int rockchip_iommu_tlb_invalidate_global(struct device *owner)
{
return -1;
}
#endif
#endif /*__ASM_PLAT_IOMMU_H*/
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