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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* IOMMU driver for BCM2712
*
* Copyright (c) 2023-2025 Raspberry Pi Ltd.
*/
#ifndef _BCM2712_IOMMU_H
#define _BCM2712_IOMMU_H
#include <linux/iommu.h>
#include <linux/scatterlist.h>
struct bcm2712_iommu_cache {
struct device *dev;
spinlock_t hw_lock; /* to protect HW registers */
void __iomem *reg_base;
};
void bcm2712_iommu_cache_flush(struct bcm2712_iommu_cache *cache);
struct bcm2712_iommu {
struct device *dev;
struct iommu_device iommu;
struct iommu_group *group;
struct bcm2712_iommu_domain *domain;
char const *name;
u64 dma_iova_offset; /* Hack for IOMMU attached to PCIe RC, included below */
u64 aperture_base; /* Base of IOVA region as passed to DMA peripherals */
u64 aperture_end; /* End of IOVA region as passed to DMA peripherals */
u32 **tables; /* For each Linux page of L2 tables, kernel virtual address */
u32 *top_table; /* Top-level table holding IOMMU page-numbers of L2 tables */
u32 *default_page; /* Page used to trap illegal reads and writes */
struct bcm2712_iommu_cache *cache;
spinlock_t hw_lock; /* to protect HW registers */
void __iomem *reg_base;
u32 bigpage_mask;
u32 superpage_mask;
unsigned int nmapped_pages;
};
struct bcm2712_iommu_domain {
struct iommu_domain base;
struct bcm2712_iommu *mmu;
};
#endif
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