1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2015-2018 Etnaviv Project 4 */ 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 12 enum etnaviv_iommu_version { 13 ETNAVIV_IOMMU_V1 = 0, 14 ETNAVIV_IOMMU_V2, 15 }; 16 17 struct etnaviv_gpu; 18 struct etnaviv_vram_mapping; 19 struct etnaviv_iommu_global; 20 struct etnaviv_iommu_context; 21 22 struct 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 34 extern const struct etnaviv_iommu_ops etnaviv_iommuv1_ops; 35 extern const struct etnaviv_iommu_ops etnaviv_iommuv2_ops; 36 37 #define ETNAVIV_PTA_SIZE SZ_4K 38 #define ETNAVIV_PTA_ENTRIES (ETNAVIV_PTA_SIZE / sizeof(u64)) 39 40 struct 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, which 54 * 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 70 struct 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 84 int etnaviv_iommu_global_init(struct etnaviv_gpu *gpu); 85 void etnaviv_iommu_global_fini(struct etnaviv_gpu *gpu); 86 87 struct etnaviv_gem_object; 88 89 int 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); 92 void etnaviv_iommu_unmap_gem(struct etnaviv_iommu_context *context, 93 struct etnaviv_vram_mapping *mapping); 94 void etnaviv_iommu_reap_mapping(struct etnaviv_vram_mapping *mapping); 95 96 int 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); 100 void etnaviv_iommu_put_suballoc_va(struct etnaviv_iommu_context *ctx, 101 struct etnaviv_vram_mapping *mapping); 102 103 size_t etnaviv_iommu_dump_size(struct etnaviv_iommu_context *ctx); 104 void etnaviv_iommu_dump(struct etnaviv_iommu_context *ctx, void *buf); 105 106 struct etnaviv_iommu_context * 107 etnaviv_iommu_context_init(struct etnaviv_iommu_global *global, 108 struct etnaviv_cmdbuf_suballoc *suballoc); 109 static inline struct etnaviv_iommu_context * 110 etnaviv_iommu_context_get(struct etnaviv_iommu_context *ctx) 111 { 112 kref_get(&ctx->refcount); 113 return ctx; 114 } 115 void etnaviv_iommu_context_put(struct etnaviv_iommu_context *ctx); 116 void etnaviv_iommu_restore(struct etnaviv_gpu *gpu, 117 struct etnaviv_iommu_context *ctx); 118 119 struct etnaviv_iommu_context * 120 etnaviv_iommuv1_context_alloc(struct etnaviv_iommu_global *global); 121 struct etnaviv_iommu_context * 122 etnaviv_iommuv2_context_alloc(struct etnaviv_iommu_global *global); 123 124 u32 etnaviv_iommuv2_get_mtlb_addr(struct etnaviv_iommu_context *context); 125 unsigned short etnaviv_iommuv2_get_pta_id(struct etnaviv_iommu_context *context); 126 127 #endif /* __ETNAVIV_MMU_H__ */ 128