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 #define AMDGPU_GPU_PAGES_IN_CPU_PAGE (PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE)
  41
  42 struct 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 #ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
  50         struct page                     **pages;
  51 #endif
  52         bool                            ready;
  53
  54         /* Asic default pte flags */
  55         uint64_t                        gart_pte_flags;
  56 };
  57
  58 int amdgpu_gart_table_vram_alloc(struct amdgpu_device *adev);
  59 void amdgpu_gart_table_vram_free(struct amdgpu_device *adev);
  60 int amdgpu_gart_table_vram_pin(struct amdgpu_device *adev);
  61 void amdgpu_gart_table_vram_unpin(struct amdgpu_device *adev);
  62 int amdgpu_gart_init(struct amdgpu_device *adev);
  63 void amdgpu_gart_fini(struct amdgpu_device *adev);
  64 int amdgpu_gart_unbind(struct amdgpu_device *adev, uint64_t offset,
  65                        int pages);
  66 int amdgpu_gart_map(struct amdgpu_device *adev, uint64_t offset,
  67                     int pages, dma_addr_t *dma_addr, uint64_t flags,
  68                     void *dst);
  69 int amdgpu_gart_bind(struct amdgpu_device *adev, uint64_t offset,
  70                      int pages, struct page **pagelist,
  71                      dma_addr_t *dma_addr, uint64_t flags);
  72
  73 #endif