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a74f4d9913
Defer root page table allocation and unify context init/fini functions. Move allocation of the root page table from the file_priv_open function to perform a lazy allocation approach during ivpu_bo_pin(). By doing so, we avoid the overhead of allocating page tables for simple operations like GET_PARAM that do not require them. Additionally, the MMU context descriptor table initialization has been moved to the ivpu_mmu_context_map_page function. This change streamlines the process and ensures that the descriptor table is only initialized when it is actually needed. Refactor init/fini functions to remove redundant code and make the context management more straightforward. Overall, these changes lead to a reduction in the time taken by the file descriptor open operation, as the costly root page table allocation is now avoided for operations that do not require it. Signed-off-by: Karol Wachowski <karol.wachowski@intel.com> Reviewed-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com> Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com> Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20241017145817.121590-3-jacek.lawrynowicz@linux.intel.com
54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
/* 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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void ivpu_mmu_user_context_mark_invalid(struct ivpu_device *vdev, u32 ssid);
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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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