74 lines
1.7 KiB
C
74 lines
1.7 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/* Copyright (C) 2013--2024 Intel Corporation */
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#ifndef IPU6_MMU_H
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#define IPU6_MMU_H
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#define ISYS_MMID 1
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#define PSYS_MMID 0
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#include <linux/list.h>
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#include <linux/spinlock_types.h>
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#include <linux/types.h>
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struct device;
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struct page;
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struct ipu6_hw_variants;
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struct ipu6_mmu_info {
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struct device *dev;
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u32 *l1_pt;
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u32 l1_pt_dma;
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u32 **l2_pts;
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u32 *dummy_l2_pt;
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u32 dummy_l2_pteval;
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void *dummy_page;
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u32 dummy_page_pteval;
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dma_addr_t aperture_start;
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dma_addr_t aperture_end;
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unsigned long pgsize_bitmap;
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spinlock_t lock; /* Serialize access to users */
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struct ipu6_dma_mapping *dmap;
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};
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struct ipu6_mmu {
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struct list_head node;
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struct ipu6_mmu_hw *mmu_hw;
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unsigned int nr_mmus;
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unsigned int mmid;
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phys_addr_t pgtbl;
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struct device *dev;
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struct ipu6_dma_mapping *dmap;
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struct list_head vma_list;
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struct page *trash_page;
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dma_addr_t pci_trash_page; /* IOVA from PCI DMA services (parent) */
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dma_addr_t iova_trash_page; /* IOVA for IPU6 child nodes to use */
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bool ready;
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spinlock_t ready_lock; /* Serialize access to bool ready */
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void (*tlb_invalidate)(struct ipu6_mmu *mmu);
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};
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struct ipu6_mmu *ipu6_mmu_init(struct device *dev,
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void __iomem *base, int mmid,
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const struct ipu6_hw_variants *hw);
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void ipu6_mmu_cleanup(struct ipu6_mmu *mmu);
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int ipu6_mmu_hw_init(struct ipu6_mmu *mmu);
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void ipu6_mmu_hw_cleanup(struct ipu6_mmu *mmu);
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int ipu6_mmu_map(struct ipu6_mmu_info *mmu_info, unsigned long iova,
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phys_addr_t paddr, size_t size);
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void ipu6_mmu_unmap(struct ipu6_mmu_info *mmu_info, unsigned long iova,
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size_t size);
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phys_addr_t ipu6_mmu_iova_to_phys(struct ipu6_mmu_info *mmu_info,
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dma_addr_t iova);
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#endif
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