1 files changed, 65 insertions, 26 deletions

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_mmu.h b/drivers/gpu/drm/etnaviv/etnaviv_mmu.h
index 34afe25df9ca..4438d66db6ab 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_mmu.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_mmu.h
@@ -16,33 +16,58 @@ enum etnaviv_iommu_version {
 
 struct etnaviv_gpu;
 struct etnaviv_vram_mapping;
-struct etnaviv_iommu_domain;
+struct etnaviv_iommu_global;
+struct etnaviv_iommu_context;
 
-struct etnaviv_iommu_domain_ops {
-	void (*free)(struct etnaviv_iommu_domain *);
-	int (*map)(struct etnaviv_iommu_domain *domain, unsigned long iova,
+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_domain *domain, unsigned long iova,
+	size_t (*unmap)(struct etnaviv_iommu_context *context, unsigned long iova,
 			size_t size);
-	size_t (*dump_size)(struct etnaviv_iommu_domain *);
-	void (*dump)(struct etnaviv_iommu_domain *, void *);
+	size_t (*dump_size)(struct etnaviv_iommu_context *);
+	void (*dump)(struct etnaviv_iommu_context *, void *);
+	void (*restore)(struct etnaviv_gpu *, struct etnaviv_iommu_context *);
 };
 
-struct etnaviv_iommu_domain {
+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;
-	u64 base;
-	u64 size;
 
-	const struct etnaviv_iommu_domain_ops *ops;
+	/*
+	 * 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 {
-	struct etnaviv_gpu *gpu;
-	struct etnaviv_iommu_domain *domain;
-
-	enum etnaviv_iommu_version version;
+struct etnaviv_iommu_context {
+	struct kref refcount;
+	struct etnaviv_iommu_global *global;
 
 	/* memory manager for GPU address area */
 	struct mutex lock;
@@ -51,26 +76,40 @@ struct etnaviv_iommu {
 	unsigned int flush_seq;
 };
 
+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 *mmu,
+int etnaviv_iommu_map_gem(struct etnaviv_iommu_context *context,
 	struct etnaviv_gem_object *etnaviv_obj, u32 memory_base,
 	struct etnaviv_vram_mapping *mapping);
-void etnaviv_iommu_unmap_gem(struct etnaviv_iommu *mmu,
+void etnaviv_iommu_unmap_gem(struct etnaviv_iommu_context *context,
 	struct etnaviv_vram_mapping *mapping);
 
-int etnaviv_iommu_get_suballoc_va(struct etnaviv_iommu *mmu,
+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 *mmu,
+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 *iommu);
-void etnaviv_iommu_dump(struct etnaviv_iommu *iommu, void *buf);
-
-struct etnaviv_iommu *etnaviv_iommu_new(struct etnaviv_gpu *gpu);
-void etnaviv_iommu_destroy(struct etnaviv_iommu *iommu);
-void etnaviv_iommu_restore(struct etnaviv_gpu *gpu);
+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);
+static inline void etnaviv_iommu_context_get(struct etnaviv_iommu_context *ctx)
+{
+	kref_get(&ctx->refcount);
+}
+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);
 
 #endif /* __ETNAVIV_MMU_H__ */