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1/*
2 * Copyright (C) 2015 Etnaviv Project
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published by
6 * the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16
17#ifndef __ETNAVIV_MMU_H__
18#define __ETNAVIV_MMU_H__
19
20#include <linux/iommu.h>
21
22enum etnaviv_iommu_version {
23 ETNAVIV_IOMMU_V1 = 0,
24 ETNAVIV_IOMMU_V2,
25};
26
27struct etnaviv_gpu;
28struct etnaviv_vram_mapping;
29
30struct etnaviv_iommu_ops {
31 struct iommu_ops ops;
32 size_t (*dump_size)(struct iommu_domain *);
33 void (*dump)(struct iommu_domain *, void *);
34};
35
36struct etnaviv_iommu {
37 struct etnaviv_gpu *gpu;
38 struct iommu_domain *domain;
39
40 enum etnaviv_iommu_version version;
41
42 /* memory manager for GPU address area */
43 struct mutex lock;
44 struct list_head mappings;
45 struct drm_mm mm;
46 u32 last_iova;
47 bool need_flush;
48};
49
50struct etnaviv_gem_object;
51
52int etnaviv_iommu_attach(struct etnaviv_iommu *iommu, const char **names,
53 int cnt);
54int etnaviv_iommu_map(struct etnaviv_iommu *iommu, u32 iova,
55 struct sg_table *sgt, unsigned len, int prot);
56int etnaviv_iommu_unmap(struct etnaviv_iommu *iommu, u32 iova,
57 struct sg_table *sgt, unsigned len);
58int etnaviv_iommu_map_gem(struct etnaviv_iommu *mmu,
59 struct etnaviv_gem_object *etnaviv_obj, u32 memory_base,
60 struct etnaviv_vram_mapping *mapping);
61void etnaviv_iommu_unmap_gem(struct etnaviv_iommu *mmu,
62 struct etnaviv_vram_mapping *mapping);
63void etnaviv_iommu_destroy(struct etnaviv_iommu *iommu);
64
65size_t etnaviv_iommu_dump_size(struct etnaviv_iommu *iommu);
66void etnaviv_iommu_dump(struct etnaviv_iommu *iommu, void *buf);
67
68struct etnaviv_iommu *etnaviv_iommu_new(struct etnaviv_gpu *gpu,
69 struct iommu_domain *domain, enum etnaviv_iommu_version version);
70
71#endif /* __ETNAVIV_MMU_H__ */
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__ */