1f6ffbd4fSLucas Stach /* SPDX-License-Identifier: GPL-2.0 */ 2a8c21a54SThe etnaviv authors /* 3f6ffbd4fSLucas Stach * Copyright (C) 2015-2018 Etnaviv Project 4a8c21a54SThe etnaviv authors */ 5a8c21a54SThe etnaviv authors 6a8c21a54SThe etnaviv authors #ifndef __ETNAVIV_MMU_H__ 7a8c21a54SThe etnaviv authors #define __ETNAVIV_MMU_H__ 8a8c21a54SThe etnaviv authors 9b6709083SLucas Stach #define ETNAVIV_PROT_READ (1 << 0) 10b6709083SLucas Stach #define ETNAVIV_PROT_WRITE (1 << 1) 11a8c21a54SThe etnaviv authors 12a8c21a54SThe etnaviv authors enum etnaviv_iommu_version { 13a8c21a54SThe etnaviv authors ETNAVIV_IOMMU_V1 = 0, 14a8c21a54SThe etnaviv authors ETNAVIV_IOMMU_V2, 15a8c21a54SThe etnaviv authors }; 16a8c21a54SThe etnaviv authors 17a8c21a54SThe etnaviv authors struct etnaviv_gpu; 18a8c21a54SThe etnaviv authors struct etnaviv_vram_mapping; 1927b67278SLucas Stach struct etnaviv_iommu_global; 2027b67278SLucas Stach struct etnaviv_iommu_context; 21a8c21a54SThe etnaviv authors 2227b67278SLucas Stach struct etnaviv_iommu_ops { 2327b67278SLucas Stach struct etnaviv_iommu_context *(*init)(struct etnaviv_iommu_global *); 2427b67278SLucas Stach void (*free)(struct etnaviv_iommu_context *); 2527b67278SLucas Stach int (*map)(struct etnaviv_iommu_context *context, unsigned long iova, 26b6709083SLucas Stach phys_addr_t paddr, size_t size, int prot); 2727b67278SLucas Stach size_t (*unmap)(struct etnaviv_iommu_context *context, unsigned long iova, 28b6709083SLucas Stach size_t size); 2927b67278SLucas Stach size_t (*dump_size)(struct etnaviv_iommu_context *); 3027b67278SLucas Stach void (*dump)(struct etnaviv_iommu_context *, void *); 3127b67278SLucas Stach void (*restore)(struct etnaviv_gpu *, struct etnaviv_iommu_context *); 32b6709083SLucas Stach }; 33b6709083SLucas Stach 3427b67278SLucas Stach extern const struct etnaviv_iommu_ops etnaviv_iommuv1_ops; 3527b67278SLucas Stach extern const struct etnaviv_iommu_ops etnaviv_iommuv2_ops; 3627b67278SLucas Stach 3727b67278SLucas Stach #define ETNAVIV_PTA_SIZE SZ_4K 3827b67278SLucas Stach #define ETNAVIV_PTA_ENTRIES (ETNAVIV_PTA_SIZE / sizeof(u64)) 3927b67278SLucas Stach 4027b67278SLucas Stach struct etnaviv_iommu_global { 41b6709083SLucas Stach struct device *dev; 4227b67278SLucas Stach enum etnaviv_iommu_version version; 4327b67278SLucas Stach const struct etnaviv_iommu_ops *ops; 4427b67278SLucas Stach unsigned int use; 4527b67278SLucas Stach struct mutex lock; 4627b67278SLucas Stach 47b6709083SLucas Stach void *bad_page_cpu; 48b6709083SLucas Stach dma_addr_t bad_page_dma; 49b6709083SLucas Stach 5017e4660aSLucas Stach u32 memory_base; 5117e4660aSLucas Stach 5227b67278SLucas Stach /* 5327b67278SLucas Stach * This union holds members needed by either MMUv1 or MMUv2, which 5427b67278SLucas Stach * can not exist at the same time. 5527b67278SLucas Stach */ 5627b67278SLucas Stach union { 5727b67278SLucas Stach struct { 5827b67278SLucas Stach struct etnaviv_iommu_context *shared_context; 5927b67278SLucas Stach } v1; 6027b67278SLucas Stach struct { 6127b67278SLucas Stach /* P(age) T(able) A(rray) */ 6227b67278SLucas Stach u64 *pta_cpu; 6327b67278SLucas Stach dma_addr_t pta_dma; 6427b67278SLucas Stach struct spinlock pta_lock; 6527b67278SLucas Stach DECLARE_BITMAP(pta_alloc, ETNAVIV_PTA_ENTRIES); 6627b67278SLucas Stach } v2; 6727b67278SLucas Stach }; 68a8c21a54SThe etnaviv authors }; 69a8c21a54SThe etnaviv authors 7027b67278SLucas Stach struct etnaviv_iommu_context { 7127b67278SLucas Stach struct kref refcount; 7227b67278SLucas Stach struct etnaviv_iommu_global *global; 73a8c21a54SThe etnaviv authors 74a8c21a54SThe etnaviv authors /* memory manager for GPU address area */ 75a8c21a54SThe etnaviv authors struct mutex lock; 76a8c21a54SThe etnaviv authors struct list_head mappings; 77a8c21a54SThe etnaviv authors struct drm_mm mm; 784900dda9SLucas Stach unsigned int flush_seq; 7917e4660aSLucas Stach 8017e4660aSLucas Stach /* Not part of the context, but needs to have the same lifetime */ 8117e4660aSLucas Stach struct etnaviv_vram_mapping cmdbuf_mapping; 82a8c21a54SThe etnaviv authors }; 83a8c21a54SThe etnaviv authors 8427b67278SLucas Stach int etnaviv_iommu_global_init(struct etnaviv_gpu *gpu); 8527b67278SLucas Stach void etnaviv_iommu_global_fini(struct etnaviv_gpu *gpu); 8627b67278SLucas Stach 87a8c21a54SThe etnaviv authors struct etnaviv_gem_object; 88a8c21a54SThe etnaviv authors 8927b67278SLucas Stach int etnaviv_iommu_map_gem(struct etnaviv_iommu_context *context, 90a8c21a54SThe etnaviv authors struct etnaviv_gem_object *etnaviv_obj, u32 memory_base, 9117eae23bSLucas Stach struct etnaviv_vram_mapping *mapping, u64 va); 9227b67278SLucas Stach void etnaviv_iommu_unmap_gem(struct etnaviv_iommu_context *context, 93a8c21a54SThe etnaviv authors struct etnaviv_vram_mapping *mapping); 94a8c21a54SThe etnaviv authors 9527b67278SLucas Stach int etnaviv_iommu_get_suballoc_va(struct etnaviv_iommu_context *ctx, 96db82a043SLucas Stach struct etnaviv_vram_mapping *mapping, 97db82a043SLucas Stach u32 memory_base, dma_addr_t paddr, 98db82a043SLucas Stach size_t size); 9927b67278SLucas Stach void etnaviv_iommu_put_suballoc_va(struct etnaviv_iommu_context *ctx, 100db82a043SLucas Stach struct etnaviv_vram_mapping *mapping); 101e07c0db5SLucas Stach 10227b67278SLucas Stach size_t etnaviv_iommu_dump_size(struct etnaviv_iommu_context *ctx); 10327b67278SLucas Stach void etnaviv_iommu_dump(struct etnaviv_iommu_context *ctx, void *buf); 104a8c21a54SThe etnaviv authors 10527b67278SLucas Stach struct etnaviv_iommu_context * 10617e4660aSLucas Stach etnaviv_iommu_context_init(struct etnaviv_iommu_global *global, 10717e4660aSLucas Stach struct etnaviv_cmdbuf_suballoc *suballoc); 10827b67278SLucas Stach static inline void etnaviv_iommu_context_get(struct etnaviv_iommu_context *ctx) 10927b67278SLucas Stach { 11027b67278SLucas Stach kref_get(&ctx->refcount); 11127b67278SLucas Stach } 11227b67278SLucas Stach void etnaviv_iommu_context_put(struct etnaviv_iommu_context *ctx); 11327b67278SLucas Stach void etnaviv_iommu_restore(struct etnaviv_gpu *gpu, 11427b67278SLucas Stach struct etnaviv_iommu_context *ctx); 11527b67278SLucas Stach 11627b67278SLucas Stach struct etnaviv_iommu_context * 11727b67278SLucas Stach etnaviv_iommuv1_context_alloc(struct etnaviv_iommu_global *global); 11827b67278SLucas Stach struct etnaviv_iommu_context * 11927b67278SLucas Stach etnaviv_iommuv2_context_alloc(struct etnaviv_iommu_global *global); 120a8c21a54SThe etnaviv authors 12117e4660aSLucas Stach u32 etnaviv_iommuv2_get_mtlb_addr(struct etnaviv_iommu_context *context); 12217e4660aSLucas Stach unsigned short etnaviv_iommuv2_get_pta_id(struct etnaviv_iommu_context *context); 12317e4660aSLucas Stach 124a8c21a54SThe etnaviv authors #endif /* __ETNAVIV_MMU_H__ */ 125