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126 lines
3.7 KiB
126 lines
3.7 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Copyright (C) 2015-2018 Etnaviv Project |
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*/ |
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#ifndef __ETNAVIV_MMU_H__ |
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#define __ETNAVIV_MMU_H__ |
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#define ETNAVIV_PROT_READ (1 << 0) |
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#define ETNAVIV_PROT_WRITE (1 << 1) |
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enum etnaviv_iommu_version { |
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ETNAVIV_IOMMU_V1 = 0, |
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ETNAVIV_IOMMU_V2, |
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}; |
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struct etnaviv_gpu; |
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struct etnaviv_vram_mapping; |
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struct etnaviv_iommu_global; |
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struct etnaviv_iommu_context; |
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struct etnaviv_iommu_ops { |
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struct etnaviv_iommu_context *(*init)(struct etnaviv_iommu_global *); |
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void (*free)(struct etnaviv_iommu_context *); |
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int (*map)(struct etnaviv_iommu_context *context, unsigned long iova, |
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phys_addr_t paddr, size_t size, int prot); |
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size_t (*unmap)(struct etnaviv_iommu_context *context, unsigned long iova, |
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size_t size); |
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size_t (*dump_size)(struct etnaviv_iommu_context *); |
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void (*dump)(struct etnaviv_iommu_context *, void *); |
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void (*restore)(struct etnaviv_gpu *, struct etnaviv_iommu_context *); |
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}; |
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extern const struct etnaviv_iommu_ops etnaviv_iommuv1_ops; |
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extern const struct etnaviv_iommu_ops etnaviv_iommuv2_ops; |
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#define ETNAVIV_PTA_SIZE SZ_4K |
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#define ETNAVIV_PTA_ENTRIES (ETNAVIV_PTA_SIZE / sizeof(u64)) |
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struct etnaviv_iommu_global { |
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struct device *dev; |
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enum etnaviv_iommu_version version; |
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const struct etnaviv_iommu_ops *ops; |
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unsigned int use; |
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struct mutex lock; |
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void *bad_page_cpu; |
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dma_addr_t bad_page_dma; |
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u32 memory_base; |
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/* |
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* This union holds members needed by either MMUv1 or MMUv2, which |
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* can not exist at the same time. |
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*/ |
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union { |
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struct { |
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struct etnaviv_iommu_context *shared_context; |
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} v1; |
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struct { |
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/* P(age) T(able) A(rray) */ |
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u64 *pta_cpu; |
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dma_addr_t pta_dma; |
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struct spinlock pta_lock; |
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DECLARE_BITMAP(pta_alloc, ETNAVIV_PTA_ENTRIES); |
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} v2; |
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}; |
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}; |
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struct etnaviv_iommu_context { |
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struct kref refcount; |
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struct etnaviv_iommu_global *global; |
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/* memory manager for GPU address area */ |
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struct mutex lock; |
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struct list_head mappings; |
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struct drm_mm mm; |
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unsigned int flush_seq; |
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/* Not part of the context, but needs to have the same lifetime */ |
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struct etnaviv_vram_mapping cmdbuf_mapping; |
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}; |
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int etnaviv_iommu_global_init(struct etnaviv_gpu *gpu); |
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void etnaviv_iommu_global_fini(struct etnaviv_gpu *gpu); |
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struct etnaviv_gem_object; |
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int etnaviv_iommu_map_gem(struct etnaviv_iommu_context *context, |
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struct etnaviv_gem_object *etnaviv_obj, u32 memory_base, |
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struct etnaviv_vram_mapping *mapping, u64 va); |
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void etnaviv_iommu_unmap_gem(struct etnaviv_iommu_context *context, |
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struct etnaviv_vram_mapping *mapping); |
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int etnaviv_iommu_get_suballoc_va(struct etnaviv_iommu_context *ctx, |
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struct etnaviv_vram_mapping *mapping, |
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u32 memory_base, dma_addr_t paddr, |
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size_t size); |
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void etnaviv_iommu_put_suballoc_va(struct etnaviv_iommu_context *ctx, |
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struct etnaviv_vram_mapping *mapping); |
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size_t etnaviv_iommu_dump_size(struct etnaviv_iommu_context *ctx); |
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void etnaviv_iommu_dump(struct etnaviv_iommu_context *ctx, void *buf); |
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struct etnaviv_iommu_context * |
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etnaviv_iommu_context_init(struct etnaviv_iommu_global *global, |
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struct etnaviv_cmdbuf_suballoc *suballoc); |
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static inline struct etnaviv_iommu_context * |
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etnaviv_iommu_context_get(struct etnaviv_iommu_context *ctx) |
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{ |
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kref_get(&ctx->refcount); |
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return ctx; |
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} |
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void etnaviv_iommu_context_put(struct etnaviv_iommu_context *ctx); |
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void etnaviv_iommu_restore(struct etnaviv_gpu *gpu, |
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struct etnaviv_iommu_context *ctx); |
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struct etnaviv_iommu_context * |
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etnaviv_iommuv1_context_alloc(struct etnaviv_iommu_global *global); |
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struct etnaviv_iommu_context * |
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etnaviv_iommuv2_context_alloc(struct etnaviv_iommu_global *global); |
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u32 etnaviv_iommuv2_get_mtlb_addr(struct etnaviv_iommu_context *context); |
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unsigned short etnaviv_iommuv2_get_pta_id(struct etnaviv_iommu_context *context); |
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#endif /* __ETNAVIV_MMU_H__ */
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