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
65u32 etnaviv_iommu_get_cmdbuf_va(struct etnaviv_gpu *gpu,
66				struct etnaviv_cmdbuf *buf);
67void etnaviv_iommu_put_cmdbuf_va(struct etnaviv_gpu *gpu,
68				 struct etnaviv_cmdbuf *buf);
69
70size_t etnaviv_iommu_dump_size(struct etnaviv_iommu *iommu);
71void etnaviv_iommu_dump(struct etnaviv_iommu *iommu, void *buf);
72
73struct etnaviv_iommu *etnaviv_iommu_new(struct etnaviv_gpu *gpu);
74void etnaviv_iommu_restore(struct etnaviv_gpu *gpu);
75
76#endif /* __ETNAVIV_MMU_H__ */