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 */
32struct amdgpu_device;
33struct 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#define AMDGPU_GPU_PAGES_IN_CPU_PAGE (PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE)
41
42struct amdgpu_gart {
43 struct amdgpu_bo *bo;
44 /* CPU kmapped address of gart table */
45 void *ptr;
46 unsigned num_gpu_pages;
47 unsigned num_cpu_pages;
48 unsigned table_size;
49
50 /* Asic default pte flags */
51 uint64_t gart_pte_flags;
52};
53
54int amdgpu_gart_table_vram_alloc(struct amdgpu_device *adev);
55void amdgpu_gart_table_vram_free(struct amdgpu_device *adev);
56int amdgpu_gart_table_vram_pin(struct amdgpu_device *adev);
57void amdgpu_gart_table_vram_unpin(struct amdgpu_device *adev);
58int amdgpu_gart_init(struct amdgpu_device *adev);
59void amdgpu_gart_dummy_page_fini(struct amdgpu_device *adev);
60void amdgpu_gart_unbind(struct amdgpu_device *adev, uint64_t offset,
61 int pages);
62void amdgpu_gart_map(struct amdgpu_device *adev, uint64_t offset,
63 int pages, dma_addr_t *dma_addr, uint64_t flags,
64 void *dst);
65void amdgpu_gart_bind(struct amdgpu_device *adev, uint64_t offset,
66 int pages, dma_addr_t *dma_addr, uint64_t flags);
67void amdgpu_gart_invalidate_tlb(struct amdgpu_device *adev);
68#endif
69

source code of linux/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.h