/* SPDX-License-Identifier: GPL-2.0 OR MIT */ /* * Copyright 2020-2021 Advanced Micro Devices, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. *
*/
/** * struct svm_range - shared virtual memory range * * @svms: list of svm ranges, structure defined in kfd_process * @migrate_mutex: to serialize range migration, validation and mapping update * @start: range start address in pages * @last: range last address in pages * @it_node: node [start, last] stored in interval tree, start, last are page * aligned, page size is (last - start + 1) * @list: link list node, used to scan all ranges of svms * @update_list:link list node used to add to update_list * @mapping: bo_va mapping structure to create and update GPU page table * @npages: number of pages * @vram_pages: vram pages number in this svm_range * @dma_addr: dma mapping address on each GPU for system memory physical page * @ttm_res: vram ttm resource map * @offset: range start offset within mm_nodes * @svm_bo: struct to manage splited amdgpu_bo * @svm_bo_list:link list node, to scan all ranges which share same svm_bo * @lock: protect prange start, last, child_list, svm_bo_list * @saved_flags:save/restore current PF_MEMALLOC flags * @flags: flags defined as KFD_IOCTL_SVM_FLAG_* * @perferred_loc: perferred location, 0 for CPU, or GPU id * @perfetch_loc: last prefetch location, 0 for CPU, or GPU id * @actual_loc: this svm_range location. 0: all pages are from sys ram; * GPU id: this svm_range may include vram pages from GPU with * id actual_loc. * @granularity:migration granularity, log2 num pages * @invalid: not 0 means cpu page table is invalidated * @validate_timestamp: system timestamp when range is validated * @notifier: register mmu interval notifier * @work_item: deferred work item information * @deferred_list: list header used to add range to deferred list * @child_list: list header for split ranges which are not added to svms yet * @bitmap_access: index bitmap of GPUs which can access the range * @bitmap_aip: index bitmap of GPUs which can access the range in place * * Data structure for virtual memory range shared by CPU and GPUs, it can be * allocated from system memory ram or device vram, and migrate from ram to vram * or from vram to ram.
*/ struct svm_range { struct svm_range_list *svms; struct mutex migrate_mutex; unsignedlong start; unsignedlong last; struct interval_tree_node it_node; struct list_head list; struct list_head update_list;
uint64_t npages;
uint64_t vram_pages;
dma_addr_t *dma_addr[MAX_GPU_INSTANCE]; struct ttm_resource *ttm_res;
uint64_t offset; struct svm_range_bo *svm_bo; struct list_head svm_bo_list; struct mutex lock; unsignedint saved_flags;
uint32_t flags;
uint32_t preferred_loc;
uint32_t prefetch_loc;
uint32_t actual_loc;
uint8_t granularity;
atomic_t invalid;
ktime_t validate_timestamp; struct mmu_interval_notifier notifier; struct svm_work_list_item work_item; struct list_head deferred_list; struct list_head child_list;
DECLARE_BITMAP(bitmap_access, MAX_GPU_INSTANCE);
DECLARE_BITMAP(bitmap_aip, MAX_GPU_INSTANCE); bool mapped_to_gpu;
atomic_t queue_refcount;
};
/* SVM API and HMM page migration work together, device memory type * is initialized to not 0 when page migration register device memory.
*/ #define KFD_IS_SVM_API_SUPPORTED(adev) ((adev)->kfd.pgmap.type != 0 ||\
((adev)->apu_prefer_gtt))
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