1 /* 2 * Copyright 2017 Advanced Micro Devices, Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: Christian König 23 */ 24 #ifndef __AMDGPU_MN_H__ 25 #define __AMDGPU_MN_H__ 26 27 #include <linux/types.h> 28 #include <linux/hmm.h> 29 #include <linux/rwsem.h> 30 #include <linux/workqueue.h> 31 #include <linux/interval_tree.h> 32 #include <linux/mmu_notifier.h> 33 34 int amdgpu_hmm_range_get_pages(struct mmu_interval_notifier *notifier, 35 uint64_t start, uint64_t npages, bool readonly, 36 void *owner, 37 struct hmm_range *hmm_range); 38 39 #if defined(CONFIG_HMM_MIRROR) 40 bool amdgpu_hmm_range_valid(struct hmm_range *hmm_range); 41 struct hmm_range *amdgpu_hmm_range_alloc(void); 42 void amdgpu_hmm_range_free(struct hmm_range *hmm_range); 43 int amdgpu_hmm_register(struct amdgpu_bo *bo, unsigned long addr); 44 void amdgpu_hmm_unregister(struct amdgpu_bo *bo); 45 #else 46 static inline int amdgpu_hmm_register(struct amdgpu_bo *bo, unsigned long addr) 47 { 48 DRM_WARN_ONCE("HMM_MIRROR kernel config option is not enabled, " 49 "add CONFIG_ZONE_DEVICE=y in config file to fix this\n"); 50 return -ENODEV; 51 } 52 53 static inline void amdgpu_hmm_unregister(struct amdgpu_bo *bo) {} 54 55 static inline bool amdgpu_hmm_range_valid(struct hmm_range *hmm_range) 56 { 57 return false; 58 } 59 60 static inline struct hmm_range *amdgpu_hmm_range_alloc(void) 61 { 62 return NULL; 63 } 64 65 static inline void amdgpu_hmm_range_free(struct hmm_range *hmm_range) {} 66 #endif 67 68 #endif 69