| 1 | /* |
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| 2 | * Copyright 2017 Advanced Micro Devices, Inc. |
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| 3 | * |
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| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 5 | * copy of this software and associated documentation files (the "Software"), |
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| 6 | * to deal in the Software without restriction, including without limitation |
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| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 9 | * Software is furnished to do so, subject to the following conditions: |
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| 10 | * |
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| 11 | * The above copyright notice and this permission notice shall be included in |
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| 12 | * all copies or substantial portions of the Software. |
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| 13 | * |
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| 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 17 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
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| 18 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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| 19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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| 20 | * OTHER DEALINGS IN THE SOFTWARE. |
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| 21 | * |
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| 22 | */ |
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| 23 | |
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| 24 | #ifndef __AMDGPU_GART_H__ |
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| 25 | #define __AMDGPU_GART_H__ |
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| 26 | |
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| 27 | #include <linux/types.h> |
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| 28 | |
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| 29 | /* |
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| 30 | * GART structures, functions & helpers |
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| 31 | */ |
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| 32 | struct amdgpu_device; |
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| 33 | struct amdgpu_bo; |
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| 34 | |
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| 35 | #define AMDGPU_GPU_PAGE_SIZE 4096 |
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| 36 | #define AMDGPU_GPU_PAGE_MASK (AMDGPU_GPU_PAGE_SIZE - 1) |
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| 37 | #define AMDGPU_GPU_PAGE_SHIFT 12 |
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| 38 | #define AMDGPU_GPU_PAGE_ALIGN(a) (((a) + AMDGPU_GPU_PAGE_MASK) & ~AMDGPU_GPU_PAGE_MASK) |
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| 39 | |
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| 40 | #define AMDGPU_GPU_PAGES_IN_CPU_PAGE (PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE) |
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| 41 | |
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| 42 | struct amdgpu_gart { |
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| 43 | struct amdgpu_bo *bo; |
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| 44 | /* CPU kmapped address of gart table */ |
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| 45 | void *ptr; |
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| 46 | unsigned num_gpu_pages; |
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| 47 | unsigned num_cpu_pages; |
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| 48 | unsigned table_size; |
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| 49 | |
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| 50 | /* Asic default pte flags */ |
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| 51 | uint64_t gart_pte_flags; |
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| 52 | }; |
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| 53 | |
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| 54 | int amdgpu_gart_table_ram_alloc(struct amdgpu_device *adev); |
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| 55 | void amdgpu_gart_table_ram_free(struct amdgpu_device *adev); |
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| 56 | int amdgpu_gart_table_vram_alloc(struct amdgpu_device *adev); |
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| 57 | void amdgpu_gart_table_vram_free(struct amdgpu_device *adev); |
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| 58 | int amdgpu_gart_init(struct amdgpu_device *adev); |
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| 59 | void amdgpu_gart_dummy_page_fini(struct amdgpu_device *adev); |
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| 60 | void amdgpu_gart_unbind(struct amdgpu_device *adev, uint64_t offset, |
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| 61 | int pages); |
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| 62 | void amdgpu_gart_map(struct amdgpu_device *adev, uint64_t offset, |
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| 63 | int pages, dma_addr_t *dma_addr, uint64_t flags, |
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| 64 | void *dst); |
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| 65 | void amdgpu_gart_bind(struct amdgpu_device *adev, uint64_t offset, |
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| 66 | int pages, dma_addr_t *dma_addr, uint64_t flags); |
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| 67 | void amdgpu_gart_map_vram_range(struct amdgpu_device *adev, uint64_t pa, |
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| 68 | uint64_t start_page, uint64_t num_pages, |
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| 69 | uint64_t flags, void *dst); |
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| 70 | void amdgpu_gart_invalidate_tlb(struct amdgpu_device *adev); |
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| 71 | #endif |
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| 72 | |
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