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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/drivers/accel/ivpu/ivpu_mmu_context.h
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/* SPDX-License-Identifier: GPL-2.0-only */

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/*

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 * Copyright (C) 2020-2023 Intel Corporation

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 */

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#ifndef __IVPU_MMU_CONTEXT_H__

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#define __IVPU_MMU_CONTEXT_H__

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#include <drm/drm_mm.h>

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struct ivpu_device;

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struct ivpu_file_priv;

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struct ivpu_addr_range;

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#define IVPU_MMU_PGTABLE_ENTRIES	512ull

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struct ivpu_mmu_pgtable {

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	u64		***pte_ptrs[IVPU_MMU_PGTABLE_ENTRIES];

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	u64		**pmd_ptrs[IVPU_MMU_PGTABLE_ENTRIES];

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	u64		*pud_ptrs[IVPU_MMU_PGTABLE_ENTRIES];

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	u64		*pgd_dma_ptr;

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	dma_addr_t	pgd_dma;

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};

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struct ivpu_mmu_context {

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	struct mutex lock; /* Protects: mm, pgtable, is_cd_valid */

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	struct drm_mm mm;

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	struct ivpu_mmu_pgtable pgtable;

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	bool is_cd_valid;

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	u32 id;

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};

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void ivpu_mmu_context_init(struct ivpu_device *vdev, struct ivpu_mmu_context *ctx, u32 context_id);

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void ivpu_mmu_context_fini(struct ivpu_device *vdev, struct ivpu_mmu_context *ctx);

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void ivpu_mmu_global_context_init(struct ivpu_device *vdev);

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void ivpu_mmu_global_context_fini(struct ivpu_device *vdev);

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int ivpu_mmu_reserved_context_init(struct ivpu_device *vdev);

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void ivpu_mmu_reserved_context_fini(struct ivpu_device *vdev);

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int ivpu_mmu_context_insert_node(struct ivpu_mmu_context *ctx, const struct ivpu_addr_range *range,

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				 u64 size, struct drm_mm_node *node);

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void ivpu_mmu_context_remove_node(struct ivpu_mmu_context *ctx, struct drm_mm_node *node);

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int ivpu_mmu_context_map_sgt(struct ivpu_device *vdev, struct ivpu_mmu_context *ctx,

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			     u64 vpu_addr, struct sg_table *sgt, bool llc_coherent);

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void ivpu_mmu_context_unmap_sgt(struct ivpu_device *vdev, struct ivpu_mmu_context *ctx,

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				u64 vpu_addr, struct sg_table *sgt);

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int ivpu_mmu_context_set_pages_ro(struct ivpu_device *vdev, struct ivpu_mmu_context *ctx,

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				  u64 vpu_addr, size_t size);

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#endif /* __IVPU_MMU_CONTEXT_H__ */

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