128 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * Copyright (C) 2015-2018 Etnaviv Project4 */5 6#ifndef __ETNAVIV_MMU_H__7#define __ETNAVIV_MMU_H__8 9#define ETNAVIV_PROT_READ (1 << 0)10#define ETNAVIV_PROT_WRITE (1 << 1)11 12enum etnaviv_iommu_version {13 ETNAVIV_IOMMU_V1 = 0,14 ETNAVIV_IOMMU_V2,15};16 17struct etnaviv_gpu;18struct etnaviv_vram_mapping;19struct etnaviv_iommu_global;20struct etnaviv_iommu_context;21 22struct etnaviv_iommu_ops {23 struct etnaviv_iommu_context *(*init)(struct etnaviv_iommu_global *);24 void (*free)(struct etnaviv_iommu_context *);25 int (*map)(struct etnaviv_iommu_context *context, unsigned long iova,26 phys_addr_t paddr, size_t size, int prot);27 size_t (*unmap)(struct etnaviv_iommu_context *context, unsigned long iova,28 size_t size);29 size_t (*dump_size)(struct etnaviv_iommu_context *);30 void (*dump)(struct etnaviv_iommu_context *, void *);31 void (*restore)(struct etnaviv_gpu *, struct etnaviv_iommu_context *);32};33 34extern const struct etnaviv_iommu_ops etnaviv_iommuv1_ops;35extern const struct etnaviv_iommu_ops etnaviv_iommuv2_ops;36 37#define ETNAVIV_PTA_SIZE SZ_4K38#define ETNAVIV_PTA_ENTRIES (ETNAVIV_PTA_SIZE / sizeof(u64))39 40struct etnaviv_iommu_global {41 struct device *dev;42 enum etnaviv_iommu_version version;43 const struct etnaviv_iommu_ops *ops;44 unsigned int use;45 struct mutex lock;46 47 void *bad_page_cpu;48 dma_addr_t bad_page_dma;49 50 u32 memory_base;51 52 /*53 * This union holds members needed by either MMUv1 or MMUv2, which54 * can not exist at the same time.55 */56 union {57 struct {58 struct etnaviv_iommu_context *shared_context;59 } v1;60 struct {61 /* P(age) T(able) A(rray) */62 u64 *pta_cpu;63 dma_addr_t pta_dma;64 struct spinlock pta_lock;65 DECLARE_BITMAP(pta_alloc, ETNAVIV_PTA_ENTRIES);66 } v2;67 };68};69 70struct etnaviv_iommu_context {71 struct kref refcount;72 struct etnaviv_iommu_global *global;73 74 /* memory manager for GPU address area */75 struct mutex lock;76 struct list_head mappings;77 struct drm_mm mm;78 unsigned int flush_seq;79 80 /* Not part of the context, but needs to have the same lifetime */81 struct etnaviv_vram_mapping cmdbuf_mapping;82};83 84int etnaviv_iommu_global_init(struct etnaviv_gpu *gpu);85void etnaviv_iommu_global_fini(struct etnaviv_gpu *gpu);86 87struct etnaviv_gem_object;88 89int etnaviv_iommu_map_gem(struct etnaviv_iommu_context *context,90 struct etnaviv_gem_object *etnaviv_obj, u32 memory_base,91 struct etnaviv_vram_mapping *mapping, u64 va);92void etnaviv_iommu_unmap_gem(struct etnaviv_iommu_context *context,93 struct etnaviv_vram_mapping *mapping);94void etnaviv_iommu_reap_mapping(struct etnaviv_vram_mapping *mapping);95 96int etnaviv_iommu_get_suballoc_va(struct etnaviv_iommu_context *ctx,97 struct etnaviv_vram_mapping *mapping,98 u32 memory_base, dma_addr_t paddr,99 size_t size);100void etnaviv_iommu_put_suballoc_va(struct etnaviv_iommu_context *ctx,101 struct etnaviv_vram_mapping *mapping);102 103size_t etnaviv_iommu_dump_size(struct etnaviv_iommu_context *ctx);104void etnaviv_iommu_dump(struct etnaviv_iommu_context *ctx, void *buf);105 106struct etnaviv_iommu_context *107etnaviv_iommu_context_init(struct etnaviv_iommu_global *global,108 struct etnaviv_cmdbuf_suballoc *suballoc);109static inline struct etnaviv_iommu_context *110etnaviv_iommu_context_get(struct etnaviv_iommu_context *ctx)111{112 kref_get(&ctx->refcount);113 return ctx;114}115void etnaviv_iommu_context_put(struct etnaviv_iommu_context *ctx);116void etnaviv_iommu_restore(struct etnaviv_gpu *gpu,117 struct etnaviv_iommu_context *ctx);118 119struct etnaviv_iommu_context *120etnaviv_iommuv1_context_alloc(struct etnaviv_iommu_global *global);121struct etnaviv_iommu_context *122etnaviv_iommuv2_context_alloc(struct etnaviv_iommu_global *global);123 124u32 etnaviv_iommuv2_get_mtlb_addr(struct etnaviv_iommu_context *context);125unsigned short etnaviv_iommuv2_get_pta_id(struct etnaviv_iommu_context *context);126 127#endif /* __ETNAVIV_MMU_H__ */128