diff options
Diffstat (limited to 'drivers/gpu/drm/etnaviv/etnaviv_mmu.h')
-rw-r--r-- | drivers/gpu/drm/etnaviv/etnaviv_mmu.h | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_mmu.h b/drivers/gpu/drm/etnaviv/etnaviv_mmu.h new file mode 100644 index 0000000000..c01a147f0d --- /dev/null +++ b/drivers/gpu/drm/etnaviv/etnaviv_mmu.h @@ -0,0 +1,127 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2015-2018 Etnaviv Project + */ + +#ifndef __ETNAVIV_MMU_H__ +#define __ETNAVIV_MMU_H__ + +#define ETNAVIV_PROT_READ (1 << 0) +#define ETNAVIV_PROT_WRITE (1 << 1) + +enum etnaviv_iommu_version { + ETNAVIV_IOMMU_V1 = 0, + ETNAVIV_IOMMU_V2, +}; + +struct etnaviv_gpu; +struct etnaviv_vram_mapping; +struct etnaviv_iommu_global; +struct etnaviv_iommu_context; + +struct etnaviv_iommu_ops { + struct etnaviv_iommu_context *(*init)(struct etnaviv_iommu_global *); + void (*free)(struct etnaviv_iommu_context *); + int (*map)(struct etnaviv_iommu_context *context, unsigned long iova, + phys_addr_t paddr, size_t size, int prot); + size_t (*unmap)(struct etnaviv_iommu_context *context, unsigned long iova, + size_t size); + size_t (*dump_size)(struct etnaviv_iommu_context *); + void (*dump)(struct etnaviv_iommu_context *, void *); + void (*restore)(struct etnaviv_gpu *, struct etnaviv_iommu_context *); +}; + +extern const struct etnaviv_iommu_ops etnaviv_iommuv1_ops; +extern const struct etnaviv_iommu_ops etnaviv_iommuv2_ops; + +#define ETNAVIV_PTA_SIZE SZ_4K +#define ETNAVIV_PTA_ENTRIES (ETNAVIV_PTA_SIZE / sizeof(u64)) + +struct etnaviv_iommu_global { + struct device *dev; + enum etnaviv_iommu_version version; + const struct etnaviv_iommu_ops *ops; + unsigned int use; + struct mutex lock; + + void *bad_page_cpu; + dma_addr_t bad_page_dma; + + u32 memory_base; + + /* + * This union holds members needed by either MMUv1 or MMUv2, which + * can not exist at the same time. + */ + union { + struct { + struct etnaviv_iommu_context *shared_context; + } v1; + struct { + /* P(age) T(able) A(rray) */ + u64 *pta_cpu; + dma_addr_t pta_dma; + struct spinlock pta_lock; + DECLARE_BITMAP(pta_alloc, ETNAVIV_PTA_ENTRIES); + } v2; + }; +}; + +struct etnaviv_iommu_context { + struct kref refcount; + struct etnaviv_iommu_global *global; + + /* memory manager for GPU address area */ + struct mutex lock; + struct list_head mappings; + struct drm_mm mm; + unsigned int flush_seq; + + /* Not part of the context, but needs to have the same lifetime */ + struct etnaviv_vram_mapping cmdbuf_mapping; +}; + +int etnaviv_iommu_global_init(struct etnaviv_gpu *gpu); +void etnaviv_iommu_global_fini(struct etnaviv_gpu *gpu); + +struct etnaviv_gem_object; + +int etnaviv_iommu_map_gem(struct etnaviv_iommu_context *context, + struct etnaviv_gem_object *etnaviv_obj, u32 memory_base, + struct etnaviv_vram_mapping *mapping, u64 va); +void etnaviv_iommu_unmap_gem(struct etnaviv_iommu_context *context, + struct etnaviv_vram_mapping *mapping); +void etnaviv_iommu_reap_mapping(struct etnaviv_vram_mapping *mapping); + +int etnaviv_iommu_get_suballoc_va(struct etnaviv_iommu_context *ctx, + struct etnaviv_vram_mapping *mapping, + u32 memory_base, dma_addr_t paddr, + size_t size); +void etnaviv_iommu_put_suballoc_va(struct etnaviv_iommu_context *ctx, + struct etnaviv_vram_mapping *mapping); + +size_t etnaviv_iommu_dump_size(struct etnaviv_iommu_context *ctx); +void etnaviv_iommu_dump(struct etnaviv_iommu_context *ctx, void *buf); + +struct etnaviv_iommu_context * +etnaviv_iommu_context_init(struct etnaviv_iommu_global *global, + struct etnaviv_cmdbuf_suballoc *suballoc); +static inline struct etnaviv_iommu_context * +etnaviv_iommu_context_get(struct etnaviv_iommu_context *ctx) +{ + kref_get(&ctx->refcount); + return ctx; +} +void etnaviv_iommu_context_put(struct etnaviv_iommu_context *ctx); +void etnaviv_iommu_restore(struct etnaviv_gpu *gpu, + struct etnaviv_iommu_context *ctx); + +struct etnaviv_iommu_context * +etnaviv_iommuv1_context_alloc(struct etnaviv_iommu_global *global); +struct etnaviv_iommu_context * +etnaviv_iommuv2_context_alloc(struct etnaviv_iommu_global *global); + +u32 etnaviv_iommuv2_get_mtlb_addr(struct etnaviv_iommu_context *context); +unsigned short etnaviv_iommuv2_get_pta_id(struct etnaviv_iommu_context *context); + +#endif /* __ETNAVIV_MMU_H__ */ |