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[linux.git] / drivers / gpu / drm / amd / amdgpu / amdgpu_gart.h
1 /*
2  * Copyright 2017 Advanced Micro Devices, Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  */
23
24 #ifndef __AMDGPU_GART_H__
25 #define __AMDGPU_GART_H__
26
27 #include <linux/types.h>
28
29 /*
30  * GART structures, functions & helpers
31  */
32 struct amdgpu_device;
33 struct amdgpu_bo;
34
35 #define AMDGPU_GPU_PAGE_SIZE 4096
36 #define AMDGPU_GPU_PAGE_MASK (AMDGPU_GPU_PAGE_SIZE - 1)
37 #define AMDGPU_GPU_PAGE_SHIFT 12
38 #define AMDGPU_GPU_PAGE_ALIGN(a) (((a) + AMDGPU_GPU_PAGE_MASK) & ~AMDGPU_GPU_PAGE_MASK)
39
40 struct amdgpu_gart {
41         u64                             table_addr;
42         struct amdgpu_bo                *robj;
43         void                            *ptr;
44         unsigned                        num_gpu_pages;
45         unsigned                        num_cpu_pages;
46         unsigned                        table_size;
47 #ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
48         struct page                     **pages;
49 #endif
50         bool                            ready;
51
52         /* Asic default pte flags */
53         uint64_t                        gart_pte_flags;
54 };
55
56 int amdgpu_gart_table_vram_alloc(struct amdgpu_device *adev);
57 void amdgpu_gart_table_vram_free(struct amdgpu_device *adev);
58 int amdgpu_gart_table_vram_pin(struct amdgpu_device *adev);
59 void amdgpu_gart_table_vram_unpin(struct amdgpu_device *adev);
60 int amdgpu_gart_init(struct amdgpu_device *adev);
61 void amdgpu_gart_fini(struct amdgpu_device *adev);
62 int amdgpu_gart_unbind(struct amdgpu_device *adev, uint64_t offset,
63                        int pages);
64 int amdgpu_gart_map(struct amdgpu_device *adev, uint64_t offset,
65                     int pages, dma_addr_t *dma_addr, uint64_t flags,
66                     void *dst);
67 int amdgpu_gart_bind(struct amdgpu_device *adev, uint64_t offset,
68                      int pages, struct page **pagelist,
69                      dma_addr_t *dma_addr, uint64_t flags);
70
71 #endif
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