cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

etnaviv_mmu.h (3796B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Copyright (C) 2015-2018 Etnaviv Project
      4 */
      5
      6#ifndef __ETNAVIV_MMU_H__
      7#define __ETNAVIV_MMU_H__
      8
      9#define ETNAVIV_PROT_READ	(1 << 0)
     10#define ETNAVIV_PROT_WRITE	(1 << 1)
     11
     12enum etnaviv_iommu_version {
     13	ETNAVIV_IOMMU_V1 = 0,
     14	ETNAVIV_IOMMU_V2,
     15};
     16
     17struct etnaviv_gpu;
     18struct etnaviv_vram_mapping;
     19struct etnaviv_iommu_global;
     20struct etnaviv_iommu_context;
     21
     22struct etnaviv_iommu_ops {
     23	struct etnaviv_iommu_context *(*init)(struct etnaviv_iommu_global *);
     24	void (*free)(struct etnaviv_iommu_context *);
     25	int (*map)(struct etnaviv_iommu_context *context, unsigned long iova,
     26		   phys_addr_t paddr, size_t size, int prot);
     27	size_t (*unmap)(struct etnaviv_iommu_context *context, unsigned long iova,
     28			size_t size);
     29	size_t (*dump_size)(struct etnaviv_iommu_context *);
     30	void (*dump)(struct etnaviv_iommu_context *, void *);
     31	void (*restore)(struct etnaviv_gpu *, struct etnaviv_iommu_context *);
     32};
     33
     34extern const struct etnaviv_iommu_ops etnaviv_iommuv1_ops;
     35extern const struct etnaviv_iommu_ops etnaviv_iommuv2_ops;
     36
     37#define ETNAVIV_PTA_SIZE	SZ_4K
     38#define ETNAVIV_PTA_ENTRIES	(ETNAVIV_PTA_SIZE / sizeof(u64))
     39
     40struct etnaviv_iommu_global {
     41	struct device *dev;
     42	enum etnaviv_iommu_version version;
     43	const struct etnaviv_iommu_ops *ops;
     44	unsigned int use;
     45	struct mutex lock;
     46
     47	void *bad_page_cpu;
     48	dma_addr_t bad_page_dma;
     49
     50	u32 memory_base;
     51
     52	/*
     53	 * This union holds members needed by either MMUv1 or MMUv2, which
     54	 * can not exist at the same time.
     55	 */
     56	union {
     57		struct {
     58			struct etnaviv_iommu_context *shared_context;
     59		} v1;
     60		struct {
     61			/* P(age) T(able) A(rray) */
     62			u64 *pta_cpu;
     63			dma_addr_t pta_dma;
     64			struct spinlock pta_lock;
     65			DECLARE_BITMAP(pta_alloc, ETNAVIV_PTA_ENTRIES);
     66		} v2;
     67	};
     68};
     69
     70struct etnaviv_iommu_context {
     71	struct kref refcount;
     72	struct etnaviv_iommu_global *global;
     73
     74	/* memory manager for GPU address area */
     75	struct mutex lock;
     76	struct list_head mappings;
     77	struct drm_mm mm;
     78	unsigned int flush_seq;
     79
     80	/* Not part of the context, but needs to have the same lifetime */
     81	struct etnaviv_vram_mapping cmdbuf_mapping;
     82};
     83
     84int etnaviv_iommu_global_init(struct etnaviv_gpu *gpu);
     85void etnaviv_iommu_global_fini(struct etnaviv_gpu *gpu);
     86
     87struct etnaviv_gem_object;
     88
     89int etnaviv_iommu_map_gem(struct etnaviv_iommu_context *context,
     90	struct etnaviv_gem_object *etnaviv_obj, u32 memory_base,
     91	struct etnaviv_vram_mapping *mapping, u64 va);
     92void etnaviv_iommu_unmap_gem(struct etnaviv_iommu_context *context,
     93	struct etnaviv_vram_mapping *mapping);
     94
     95int etnaviv_iommu_get_suballoc_va(struct etnaviv_iommu_context *ctx,
     96				  struct etnaviv_vram_mapping *mapping,
     97				  u32 memory_base, dma_addr_t paddr,
     98				  size_t size);
     99void etnaviv_iommu_put_suballoc_va(struct etnaviv_iommu_context *ctx,
    100				   struct etnaviv_vram_mapping *mapping);
    101
    102size_t etnaviv_iommu_dump_size(struct etnaviv_iommu_context *ctx);
    103void etnaviv_iommu_dump(struct etnaviv_iommu_context *ctx, void *buf);
    104
    105struct etnaviv_iommu_context *
    106etnaviv_iommu_context_init(struct etnaviv_iommu_global *global,
    107			   struct etnaviv_cmdbuf_suballoc *suballoc);
    108static inline struct etnaviv_iommu_context *
    109etnaviv_iommu_context_get(struct etnaviv_iommu_context *ctx)
    110{
    111	kref_get(&ctx->refcount);
    112	return ctx;
    113}
    114void etnaviv_iommu_context_put(struct etnaviv_iommu_context *ctx);
    115void etnaviv_iommu_restore(struct etnaviv_gpu *gpu,
    116			   struct etnaviv_iommu_context *ctx);
    117
    118struct etnaviv_iommu_context *
    119etnaviv_iommuv1_context_alloc(struct etnaviv_iommu_global *global);
    120struct etnaviv_iommu_context *
    121etnaviv_iommuv2_context_alloc(struct etnaviv_iommu_global *global);
    122
    123u32 etnaviv_iommuv2_get_mtlb_addr(struct etnaviv_iommu_context *context);
    124unsigned short etnaviv_iommuv2_get_pta_id(struct etnaviv_iommu_context *context);
    125
    126#endif /* __ETNAVIV_MMU_H__ */