amd/amdgpu/amdgpu_vram_mgr.h

0001 /* SPDX-License-Identifier: MIT
0002  * Copyright 2021 Advanced Micro Devices, Inc.
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice shall be included in
0012  * all copies or substantial portions of the Software.
0013  *
0014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0017  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
0018  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
0019  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
0020  * OTHER DEALINGS IN THE SOFTWARE.
0021  *
0022  */
0023
0024 #ifndef __AMDGPU_VRAM_MGR_H__
0025 #define __AMDGPU_VRAM_MGR_H__
0026
0027 #include <drm/drm_buddy.h>
0028
0029 struct amdgpu_vram_mgr {
0030     struct ttm_resource_manager manager;
0031     struct drm_buddy mm;
0032     /* protects access to buffer objects */
0033     struct mutex lock;
0034     struct list_head reservations_pending;
0035     struct list_head reserved_pages;
0036     atomic64_t vis_usage;
0037     u64 default_page_size;
0038 };
0039
0040 struct amdgpu_vram_mgr_resource {
0041     struct ttm_resource base;
0042     struct list_head blocks;
0043     unsigned long flags;
0044 };
0045
0046 static inline u64 amdgpu_vram_mgr_block_start(struct drm_buddy_block *block)
0047 {
0048     return drm_buddy_block_offset(block);
0049 }
0050
0051 static inline u64 amdgpu_vram_mgr_block_size(struct drm_buddy_block *block)
0052 {
0053     return (u64)PAGE_SIZE << drm_buddy_block_order(block);
0054 }
0055
0056 static inline struct amdgpu_vram_mgr_resource *
0057 to_amdgpu_vram_mgr_resource(struct ttm_resource *res)
0058 {
0059     return container_of(res, struct amdgpu_vram_mgr_resource, base);
0060 }
0061
0062 #endif