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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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ba110db8e1
Move the DRM buddy allocator one level up so that it can be used by GPU drivers (example, nova-core) that have usecases other than DRM (such as VFIO vGPU support). Modify the API, structures and Kconfigs to use "gpu_buddy" terminology. Adapt the drivers and tests to use the new API. The commit cannot be split due to bisectability, however no functional change is intended. Verified by running K-UNIT tests and build tested various configurations. Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com> Reviewed-by: Dave Airlie <airlied@redhat.com> [airlied: I've split this into two so git can find copies easier. I've also just nuked drm_random library, that stuff needs to be done elsewhere and only the buddy tests seem to be using it]. Signed-off-by: Dave Airlie <airlied@redhat.com>
93 lines
2.8 KiB
C
93 lines
2.8 KiB
C
/* SPDX-License-Identifier: MIT
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* Copyright 2021 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#ifndef __AMDGPU_VRAM_MGR_H__
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#define __AMDGPU_VRAM_MGR_H__
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#include <linux/gpu_buddy.h>
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struct amdgpu_vram_mgr {
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struct ttm_resource_manager manager;
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struct gpu_buddy mm;
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/* protects access to buffer objects */
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struct mutex lock;
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struct list_head reservations_pending;
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struct list_head reserved_pages;
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atomic64_t vis_usage;
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u64 default_page_size;
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struct list_head allocated_vres_list;
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};
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struct amdgpu_vres_task {
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pid_t pid;
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char comm[TASK_COMM_LEN];
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};
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struct amdgpu_vram_block_info {
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u64 start;
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u64 size;
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struct amdgpu_vres_task task;
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};
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struct amdgpu_vram_mgr_resource {
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struct ttm_resource base;
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struct list_head blocks;
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unsigned long flags;
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struct list_head vres_node;
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struct amdgpu_vres_task task;
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};
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static inline u64 amdgpu_vram_mgr_block_start(struct gpu_buddy_block *block)
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{
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return gpu_buddy_block_offset(block);
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}
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static inline u64 amdgpu_vram_mgr_block_size(struct gpu_buddy_block *block)
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{
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return (u64)PAGE_SIZE << gpu_buddy_block_order(block);
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}
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static inline bool amdgpu_vram_mgr_is_cleared(struct gpu_buddy_block *block)
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{
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return gpu_buddy_block_is_clear(block);
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}
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static inline struct amdgpu_vram_mgr_resource *
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to_amdgpu_vram_mgr_resource(struct ttm_resource *res)
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{
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return container_of(res, struct amdgpu_vram_mgr_resource, base);
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}
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static inline void amdgpu_vram_mgr_set_cleared(struct ttm_resource *res)
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{
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struct amdgpu_vram_mgr_resource *ares = to_amdgpu_vram_mgr_resource(res);
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WARN_ON(ares->flags & GPU_BUDDY_CLEARED);
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ares->flags |= GPU_BUDDY_CLEARED;
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}
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int amdgpu_vram_mgr_query_address_block_info(struct amdgpu_vram_mgr *mgr,
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uint64_t address, struct amdgpu_vram_block_info *info);
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#endif
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