/* 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. * */ #ifndef KFD_SVM_H_ #define KFD_SVM_H_ #if IS_ENABLED(CONFIG_HSA_AMD_SVM) #include #include #include #include #include #include "amdgpu.h" #include "kfd_priv.h" struct svm_range_bo { struct amdgpu_bo *bo; struct kref kref; struct list_head range_list; /* all svm ranges shared this bo */ spinlock_t list_lock; struct amdgpu_amdkfd_fence *eviction_fence; struct work_struct eviction_work; struct svm_range_list *svms; uint32_t evicting; }; enum svm_work_list_ops { SVM_OP_NULL, SVM_OP_UNMAP_RANGE, SVM_OP_UPDATE_RANGE_NOTIFIER, SVM_OP_UPDATE_RANGE_NOTIFIER_AND_MAP, SVM_OP_ADD_RANGE, SVM_OP_ADD_RANGE_AND_MAP }; struct svm_work_list_item { enum svm_work_list_ops op; struct mm_struct *mm; }; /** * 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 * @remove_list:link list node used to add to remove list * @insert_list:link list node used to add to insert list * @mapping: bo_va mapping structure to create and update GPU page table * @npages: number of pages * @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: the actual location, 0 for CPU, or GPU id * @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; unsigned long start; unsigned long last; struct interval_tree_node it_node; struct list_head list; struct list_head update_list; struct list_head remove_list; struct list_head insert_list; struct amdgpu_bo_va_mapping mapping; uint64_t npages; 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; unsigned int saved_flags; uint32_t flags; uint32_t preferred_loc; uint32_t prefetch_loc; uint32_t actual_loc; uint8_t granularity; atomic_t invalid; uint64_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 validated_once; }; static inline void svm_range_lock(struct svm_range *prange) { mutex_lock(&prange->lock); prange->saved_flags = memalloc_noreclaim_save(); } static inline void svm_range_unlock(struct svm_range *prange) { memalloc_noreclaim_restore(prange->saved_flags); mutex_unlock(&prange->lock); } int svm_range_list_init(struct kfd_process *p); void svm_range_list_fini(struct kfd_process *p); int svm_ioctl(struct kfd_process *p, enum kfd_ioctl_svm_op op, uint64_t start, uint64_t size, uint32_t nattrs, struct kfd_ioctl_svm_attribute *attrs); struct svm_range *svm_range_from_addr(struct svm_range_list *svms, unsigned long addr, struct svm_range **parent); struct amdgpu_device *svm_range_get_adev_by_id(struct svm_range *prange, uint32_t id); int svm_range_vram_node_new(struct amdgpu_device *adev, struct svm_range *prange, bool clear); void svm_range_vram_node_free(struct svm_range *prange); int svm_range_split_by_granularity(struct kfd_process *p, struct mm_struct *mm, unsigned long addr, struct svm_range *parent, struct svm_range *prange); int svm_range_restore_pages(struct amdgpu_device *adev, unsigned int pasid, uint64_t addr); int svm_range_schedule_evict_svm_bo(struct amdgpu_amdkfd_fence *fence); void svm_range_add_list_work(struct svm_range_list *svms, struct svm_range *prange, struct mm_struct *mm, enum svm_work_list_ops op); void schedule_deferred_list_work(struct svm_range_list *svms); void svm_range_dma_unmap(struct device *dev, dma_addr_t *dma_addr, unsigned long offset, unsigned long npages); void svm_range_free_dma_mappings(struct svm_range *prange); void svm_range_prefault(struct svm_range *prange, struct mm_struct *mm); #else struct kfd_process; static inline int svm_range_list_init(struct kfd_process *p) { return 0; } static inline void svm_range_list_fini(struct kfd_process *p) { /* empty */ } static inline int svm_range_restore_pages(struct amdgpu_device *adev, unsigned int pasid, uint64_t addr) { return -EFAULT; } static inline int svm_range_schedule_evict_svm_bo( struct amdgpu_amdkfd_fence *fence) { WARN_ONCE(1, "SVM eviction fence triggered, but SVM is disabled"); return -EINVAL; } #endif /* IS_ENABLED(CONFIG_HSA_AMD_SVM) */ #endif /* KFD_SVM_H_ */