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/* 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);
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 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);
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__ */
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