1 /* SPDX-License-Identifier: MIT 2 * Copyright 2021 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_VRAM_MGR_H__ 25 #define __AMDGPU_VRAM_MGR_H__ 26 27 #include <drm/drm_buddy.h> 28 29 struct amdgpu_vram_mgr { 30 struct ttm_resource_manager manager; 31 struct drm_buddy mm; 32 /* protects access to buffer objects */ 33 struct mutex lock; 34 struct list_head reservations_pending; 35 struct list_head reserved_pages; 36 atomic64_t vis_usage; 37 u64 default_page_size; 38 }; 39 40 struct amdgpu_vram_mgr_resource { 41 struct ttm_resource base; 42 struct list_head blocks; 43 unsigned long flags; 44 }; 45 46 static inline u64 amdgpu_vram_mgr_block_start(struct drm_buddy_block *block) 47 { 48 return drm_buddy_block_offset(block); 49 } 50 51 static inline u64 amdgpu_vram_mgr_block_size(struct drm_buddy_block *block) 52 { 53 return PAGE_SIZE << drm_buddy_block_order(block); 54 } 55 56 static inline struct drm_buddy_block * 57 amdgpu_vram_mgr_first_block(struct list_head *list) 58 { 59 return list_first_entry_or_null(list, struct drm_buddy_block, link); 60 } 61 62 static inline bool amdgpu_is_vram_mgr_blocks_contiguous(struct list_head *head) 63 { 64 struct drm_buddy_block *block; 65 u64 start, size; 66 67 block = amdgpu_vram_mgr_first_block(head); 68 if (!block) 69 return false; 70 71 while (head != block->link.next) { 72 start = amdgpu_vram_mgr_block_start(block); 73 size = amdgpu_vram_mgr_block_size(block); 74 75 block = list_entry(block->link.next, struct drm_buddy_block, link); 76 if (start + size != amdgpu_vram_mgr_block_start(block)) 77 return false; 78 } 79 80 return true; 81 } 82 83 static inline struct amdgpu_vram_mgr_resource * 84 to_amdgpu_vram_mgr_resource(struct ttm_resource *res) 85 { 86 return container_of(res, struct amdgpu_vram_mgr_resource, base); 87 } 88 89 #endif 90