1 files changed, 76 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 000000000..348a94d96
--- /dev/null
+++ b/drivers/gpu/drm/etnaviv/etnaviv_mmu.h
@@ -0,0 +1,76 @@
+/* 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_domain;
+
+struct etnaviv_iommu_domain_ops {
+	void (*free)(struct etnaviv_iommu_domain *);
+	int (*map)(struct etnaviv_iommu_domain *domain, 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 size);
+	size_t (*dump_size)(struct etnaviv_iommu_domain *);
+	void (*dump)(struct etnaviv_iommu_domain *, void *);
+};
+
+struct etnaviv_iommu_domain {
+	struct device *dev;
+	void *bad_page_cpu;
+	dma_addr_t bad_page_dma;
+	u64 base;
+	u64 size;
+
+	const struct etnaviv_iommu_domain_ops *ops;
+};
+
+struct etnaviv_iommu {
+	struct etnaviv_gpu *gpu;
+	struct etnaviv_iommu_domain *domain;
+
+	enum etnaviv_iommu_version version;
+
+	/* memory manager for GPU address area */
+	struct mutex lock;
+	struct list_head mappings;
+	struct drm_mm mm;
+	unsigned int flush_seq;
+};
+
+struct etnaviv_gem_object;
+
+int etnaviv_iommu_map_gem(struct etnaviv_iommu *mmu,
+	struct etnaviv_gem_object *etnaviv_obj, u32 memory_base,
+	struct etnaviv_vram_mapping *mapping);
+void etnaviv_iommu_unmap_gem(struct etnaviv_iommu *mmu,
+	struct etnaviv_vram_mapping *mapping);
+
+int etnaviv_iommu_get_suballoc_va(struct etnaviv_gpu *gpu, dma_addr_t paddr,
+				  struct drm_mm_node *vram_node, size_t size,
+				  u32 *iova);
+void etnaviv_iommu_put_suballoc_va(struct etnaviv_gpu *gpu,
+				   struct drm_mm_node *vram_node, size_t size,
+				   u32 iova);
+
+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);
+
+#endif /* __ETNAVIV_MMU_H__ */