diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_svm.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_svm.h | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.h b/drivers/gpu/drm/amd/amdkfd/kfd_svm.h new file mode 100644 index 000000000000..0c0fc399395e --- /dev/null +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.h @@ -0,0 +1,213 @@ +/* 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 <linux/rwsem.h> +#include <linux/list.h> +#include <linux/mutex.h> +#include <linux/sched/mm.h> +#include <linux/hmm.h> +#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); + +/* 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(dev) ((dev)->pgmap.type != 0) + +#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; +} + +#define KFD_IS_SVM_API_SUPPORTED(dev) false + +#endif /* IS_ENABLED(CONFIG_HSA_AMD_SVM) */ + +#endif /* KFD_SVM_H_ */ |