/* * Copyright 2017 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. * * Authors: Christian König */ #ifndef __AMDGPU_MN_H__ #define __AMDGPU_MN_H__ #include <linux/types.h> #include <linux/hmm.h> #include <linux/rwsem.h> #include <linux/workqueue.h> #include <linux/interval_tree.h> enum amdgpu_mn_type { AMDGPU_MN_TYPE_GFX, AMDGPU_MN_TYPE_HSA, }; /** * struct amdgpu_mn * * @adev: amdgpu device pointer * @mm: process address space * @type: type of MMU notifier * @work: destruction work item * @node: hash table node to find structure by adev and mn * @lock: rw semaphore protecting the notifier nodes * @objects: interval tree containing amdgpu_mn_nodes * @mirror: HMM mirror function support * * Data for each amdgpu device and process address space. */ struct amdgpu_mn { /* constant after initialisation */ struct amdgpu_device *adev; struct mm_struct *mm; enum amdgpu_mn_type type; /* only used on destruction */ struct work_struct work; /* protected by adev->mn_lock */ struct hlist_node node; /* objects protected by lock */ struct rw_semaphore lock; struct rb_root_cached objects; #ifdef [31mCONFIG_HMM_MIRROR[0m /* HMM mirror */ struct hmm_mirror mirror; #endif }; #if defined([31mCONFIG_HMM_MIRROR[0m) void amdgpu_mn_lock(struct amdgpu_mn *mn); void amdgpu_mn_unlock(struct amdgpu_mn *mn); struct amdgpu_mn *amdgpu_mn_get(struct amdgpu_device *adev, enum amdgpu_mn_type type); int amdgpu_mn_register(struct amdgpu_bo *bo, unsigned long addr); void amdgpu_mn_unregister(struct amdgpu_bo *bo); void amdgpu_hmm_init_range(struct hmm_range *range); #else static inline void amdgpu_mn_lock(struct amdgpu_mn *mn) {} static inline void amdgpu_mn_unlock(struct amdgpu_mn *mn) {} static inline struct amdgpu_mn *amdgpu_mn_get(struct amdgpu_device *adev, enum amdgpu_mn_type type) { return NULL; } static inline int amdgpu_mn_register(struct amdgpu_bo *bo, unsigned long addr) { DRM_WARN_ONCE("HMM_MIRROR kernel config option is not enabled, " "add CONFIG_ZONE_DEVICE=y in config file to fix this\n"); return -ENODEV; } static inline void amdgpu_mn_unregister(struct amdgpu_bo *bo) {} #endif #endif |