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2024-02-19 890e1df1bec891d9203724541e81f8fbe5183388

 kernel/drivers/gpu/drm/etnaviv/etnaviv_mmu.h
..
..
@@ -16,61 +16,111 @@
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 struct etnaviv_gpu;
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 struct etnaviv_vram_mapping;
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-struct etnaviv_iommu_domain;
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+struct etnaviv_iommu_global;
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+struct etnaviv_iommu_context;
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-struct etnaviv_iommu_domain_ops {
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-	void (*free)(struct etnaviv_iommu_domain *);
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-	int (*map)(struct etnaviv_iommu_domain *domain, unsigned long iova,
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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_domain *domain, unsigned long iova,
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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_domain *);
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-	void (*dump)(struct etnaviv_iommu_domain *, void *);
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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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-struct etnaviv_iommu_domain {
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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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+
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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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+
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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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+
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 	void *bad_page_cpu;
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 	dma_addr_t bad_page_dma;
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-	u64 base;
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-	u64 size;
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-	const struct etnaviv_iommu_domain_ops *ops;
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+	u32 memory_base;
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+
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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 {
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-	struct etnaviv_gpu *gpu;
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-	struct etnaviv_iommu_domain *domain;
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-
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-	enum etnaviv_iommu_version version;
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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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+
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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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+
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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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88
 
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-int etnaviv_iommu_map_gem(struct etnaviv_iommu *mmu,
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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);
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-void etnaviv_iommu_unmap_gem(struct etnaviv_iommu *mmu,
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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_gpu *gpu, dma_addr_t paddr,
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-				  struct drm_mm_node *vram_node, size_t size,
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-				  u32 *iova);
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-void etnaviv_iommu_put_suballoc_va(struct etnaviv_gpu *gpu,
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-				   struct drm_mm_node *vram_node, size_t size,
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-				   u32 iova);
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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 *iommu);
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-void etnaviv_iommu_dump(struct etnaviv_iommu *iommu, void *buf);
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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 *etnaviv_iommu_new(struct etnaviv_gpu *gpu);
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-void etnaviv_iommu_destroy(struct etnaviv_iommu *iommu);
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-void etnaviv_iommu_restore(struct etnaviv_gpu *gpu);
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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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+
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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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+
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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__ */