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      1 /*	$NetBSD: amdgpu_gart.h,v 1.4 2021/12/19 12:21:29 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2017 Advanced Micro Devices, Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  */
     25 
     26 #ifndef __AMDGPU_GART_H__
     27 #define __AMDGPU_GART_H__
     28 
     29 #include <linux/types.h>
     30 
     31 /*
     32  * GART structures, functions & helpers
     33  */
     34 struct amdgpu_device;
     35 struct amdgpu_bo;
     36 
     37 #define AMDGPU_GPU_PAGE_SIZE 4096
     38 #define AMDGPU_GPU_PAGE_MASK (AMDGPU_GPU_PAGE_SIZE - 1)
     39 #define AMDGPU_GPU_PAGE_SHIFT 12
     40 #define AMDGPU_GPU_PAGE_ALIGN(a) (((a) + AMDGPU_GPU_PAGE_MASK) & ~AMDGPU_GPU_PAGE_MASK)
     41 
     42 #define AMDGPU_GPU_PAGES_IN_CPU_PAGE (PAGE_SIZE / AMDGPU_GPU_PAGE_SIZE)
     43 
     44 struct amdgpu_gart {
     45 #ifdef __NetBSD__
     46 	bus_dma_segment_t		ag_table_seg;
     47 	bus_dmamap_t			ag_table_map;
     48 #endif
     49 	struct amdgpu_bo		*bo;
     50 	/* CPU kmapped address of gart table */
     51 	void				*ptr;
     52 	unsigned			num_gpu_pages;
     53 	unsigned			num_cpu_pages;
     54 	unsigned			table_size;
     55 #ifdef CONFIG_DRM_AMDGPU_GART_DEBUGFS
     56 	struct page			**pages;
     57 #endif
     58 	bool				ready;
     59 
     60 	/* Asic default pte flags */
     61 	uint64_t			gart_pte_flags;
     62 };
     63 
     64 int amdgpu_gart_table_vram_alloc(struct amdgpu_device *adev);
     65 void amdgpu_gart_table_vram_free(struct amdgpu_device *adev);
     66 int amdgpu_gart_table_vram_pin(struct amdgpu_device *adev);
     67 void amdgpu_gart_table_vram_unpin(struct amdgpu_device *adev);
     68 int amdgpu_gart_init(struct amdgpu_device *adev);
     69 void amdgpu_gart_fini(struct amdgpu_device *adev);
     70 #ifdef __NetBSD__
     71 int amdgpu_gart_unbind(struct amdgpu_device *adev, uint64_t gpu_start,
     72     unsigned npages);
     73 int amdgpu_gart_map(struct amdgpu_device *adev, uint64_t gpu_start,
     74     unsigned npages, bus_size_t map_start, bus_dmamap_t map, uint32_t flags,
     75     void *dst);
     76 int amdgpu_gart_bind(struct amdgpu_device *adev, uint64_t gpu_start,
     77     unsigned npages, struct page **pagelist, bus_dmamap_t dmamap,
     78     uint32_t flags);
     79 #else
     80 int amdgpu_gart_unbind(struct amdgpu_device *adev, uint64_t offset,
     81 		       int pages);
     82 int amdgpu_gart_map(struct amdgpu_device *adev, uint64_t offset,
     83 		    int pages, dma_addr_t *dma_addr, uint64_t flags,
     84 		    void *dst);
     85 int amdgpu_gart_bind(struct amdgpu_device *adev, uint64_t offset,
     86 		     int pages, struct page **pagelist,
     87 		     dma_addr_t *dma_addr, uint64_t flags);
     88 #endif
     89 
     90 #endif
     91