1 /*
2  * Copyright 2014 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 
23 /* amdgpu_amdkfd.h defines the private interface between amdgpu and amdkfd. */
24 
25 #ifndef AMDGPU_AMDKFD_H_INCLUDED
26 #define AMDGPU_AMDKFD_H_INCLUDED
27 
28 #include <linux/types.h>
29 #include <linux/mm.h>
30 #include <linux/kthread.h>
31 #include <linux/workqueue.h>
32 #include <kgd_kfd_interface.h>
33 #include <drm/ttm/ttm_execbuf_util.h>
34 #include "amdgpu_sync.h"
35 #include "amdgpu_vm.h"
36 
37 extern uint64_t amdgpu_amdkfd_total_mem_size;
38 
39 enum TLB_FLUSH_TYPE {
40 	TLB_FLUSH_LEGACY = 0,
41 	TLB_FLUSH_LIGHTWEIGHT,
42 	TLB_FLUSH_HEAVYWEIGHT
43 };
44 
45 struct amdgpu_device;
46 
47 enum kfd_mem_attachment_type {
48 	KFD_MEM_ATT_SHARED,	/* Share kgd_mem->bo or another attachment's */
49 	KFD_MEM_ATT_USERPTR,	/* SG bo to DMA map pages from a userptr bo */
50 	KFD_MEM_ATT_DMABUF,	/* DMAbuf to DMA map TTM BOs */
51 };
52 
53 struct kfd_mem_attachment {
54 	struct list_head list;
55 	enum kfd_mem_attachment_type type;
56 	bool is_mapped;
57 	struct amdgpu_bo_va *bo_va;
58 	struct amdgpu_device *adev;
59 	uint64_t va;
60 	uint64_t pte_flags;
61 };
62 
63 struct kgd_mem {
64 	struct mutex lock;
65 	struct amdgpu_bo *bo;
66 	struct dma_buf *dmabuf;
67 	struct list_head attachments;
68 	/* protected by amdkfd_process_info.lock */
69 	struct ttm_validate_buffer validate_list;
70 	struct ttm_validate_buffer resv_list;
71 	uint32_t domain;
72 	unsigned int mapped_to_gpu_memory;
73 	uint64_t va;
74 
75 	uint32_t alloc_flags;
76 
77 	atomic_t invalid;
78 	struct amdkfd_process_info *process_info;
79 
80 	struct amdgpu_sync sync;
81 
82 	bool aql_queue;
83 	bool is_imported;
84 };
85 
86 /* KFD Memory Eviction */
87 struct amdgpu_amdkfd_fence {
88 	struct dma_fence base;
89 	struct mm_struct *mm;
90 	spinlock_t lock;
91 	char timeline_name[TASK_COMM_LEN];
92 	struct svm_range_bo *svm_bo;
93 };
94 
95 struct amdgpu_kfd_dev {
96 	struct kfd_dev *dev;
97 	uint64_t vram_used;
98 	bool init_complete;
99 };
100 
101 enum kgd_engine_type {
102 	KGD_ENGINE_PFP = 1,
103 	KGD_ENGINE_ME,
104 	KGD_ENGINE_CE,
105 	KGD_ENGINE_MEC1,
106 	KGD_ENGINE_MEC2,
107 	KGD_ENGINE_RLC,
108 	KGD_ENGINE_SDMA1,
109 	KGD_ENGINE_SDMA2,
110 	KGD_ENGINE_MAX
111 };
112 
113 
114 struct amdkfd_process_info {
115 	/* List head of all VMs that belong to a KFD process */
116 	struct list_head vm_list_head;
117 	/* List head for all KFD BOs that belong to a KFD process. */
118 	struct list_head kfd_bo_list;
119 	/* List of userptr BOs that are valid or invalid */
120 	struct list_head userptr_valid_list;
121 	struct list_head userptr_inval_list;
122 	/* Lock to protect kfd_bo_list */
123 	struct mutex lock;
124 
125 	/* Number of VMs */
126 	unsigned int n_vms;
127 	/* Eviction Fence */
128 	struct amdgpu_amdkfd_fence *eviction_fence;
129 
130 	/* MMU-notifier related fields */
131 	atomic_t evicted_bos;
132 	struct delayed_work restore_userptr_work;
133 	struct pid *pid;
134 	bool block_mmu_notifications;
135 };
136 
137 int amdgpu_amdkfd_init(void);
138 void amdgpu_amdkfd_fini(void);
139 
140 void amdgpu_amdkfd_suspend(struct amdgpu_device *adev, bool run_pm);
141 int amdgpu_amdkfd_resume_iommu(struct amdgpu_device *adev);
142 int amdgpu_amdkfd_resume(struct amdgpu_device *adev, bool run_pm);
143 void amdgpu_amdkfd_interrupt(struct amdgpu_device *adev,
144 			const void *ih_ring_entry);
145 void amdgpu_amdkfd_device_probe(struct amdgpu_device *adev);
146 void amdgpu_amdkfd_device_init(struct amdgpu_device *adev);
147 void amdgpu_amdkfd_device_fini_sw(struct amdgpu_device *adev);
148 int amdgpu_amdkfd_submit_ib(struct amdgpu_device *adev,
149 				enum kgd_engine_type engine,
150 				uint32_t vmid, uint64_t gpu_addr,
151 				uint32_t *ib_cmd, uint32_t ib_len);
152 void amdgpu_amdkfd_set_compute_idle(struct amdgpu_device *adev, bool idle);
153 bool amdgpu_amdkfd_have_atomics_support(struct amdgpu_device *adev);
154 int amdgpu_amdkfd_flush_gpu_tlb_vmid(struct amdgpu_device *adev,
155 				uint16_t vmid);
156 int amdgpu_amdkfd_flush_gpu_tlb_pasid(struct amdgpu_device *adev,
157 				uint16_t pasid, enum TLB_FLUSH_TYPE flush_type);
158 
159 bool amdgpu_amdkfd_is_kfd_vmid(struct amdgpu_device *adev, u32 vmid);
160 
161 int amdgpu_amdkfd_pre_reset(struct amdgpu_device *adev);
162 
163 int amdgpu_amdkfd_post_reset(struct amdgpu_device *adev);
164 
165 void amdgpu_amdkfd_gpu_reset(struct amdgpu_device *adev);
166 
167 int amdgpu_queue_mask_bit_to_set_resource_bit(struct amdgpu_device *adev,
168 					int queue_bit);
169 
170 struct amdgpu_amdkfd_fence *amdgpu_amdkfd_fence_create(u64 context,
171 				struct mm_struct *mm,
172 				struct svm_range_bo *svm_bo);
173 #if IS_ENABLED(CONFIG_HSA_AMD)
174 bool amdkfd_fence_check_mm(struct dma_fence *f, struct mm_struct *mm);
175 struct amdgpu_amdkfd_fence *to_amdgpu_amdkfd_fence(struct dma_fence *f);
176 int amdgpu_amdkfd_remove_fence_on_pt_pd_bos(struct amdgpu_bo *bo);
177 int amdgpu_amdkfd_evict_userptr(struct kgd_mem *mem, struct mm_struct *mm);
178 #else
179 static inline
180 bool amdkfd_fence_check_mm(struct dma_fence *f, struct mm_struct *mm)
181 {
182 	return false;
183 }
184 
185 static inline
186 struct amdgpu_amdkfd_fence *to_amdgpu_amdkfd_fence(struct dma_fence *f)
187 {
188 	return NULL;
189 }
190 
191 static inline
192 int amdgpu_amdkfd_remove_fence_on_pt_pd_bos(struct amdgpu_bo *bo)
193 {
194 	return 0;
195 }
196 
197 static inline
198 int amdgpu_amdkfd_evict_userptr(struct kgd_mem *mem, struct mm_struct *mm)
199 {
200 	return 0;
201 }
202 #endif
203 /* Shared API */
204 int amdgpu_amdkfd_alloc_gtt_mem(struct amdgpu_device *adev, size_t size,
205 				void **mem_obj, uint64_t *gpu_addr,
206 				void **cpu_ptr, bool mqd_gfx9);
207 void amdgpu_amdkfd_free_gtt_mem(struct amdgpu_device *adev, void *mem_obj);
208 int amdgpu_amdkfd_alloc_gws(struct amdgpu_device *adev, size_t size,
209 				void **mem_obj);
210 void amdgpu_amdkfd_free_gws(struct amdgpu_device *adev, void *mem_obj);
211 int amdgpu_amdkfd_add_gws_to_process(void *info, void *gws, struct kgd_mem **mem);
212 int amdgpu_amdkfd_remove_gws_from_process(void *info, void *mem);
213 uint32_t amdgpu_amdkfd_get_fw_version(struct amdgpu_device *adev,
214 				      enum kgd_engine_type type);
215 void amdgpu_amdkfd_get_local_mem_info(struct amdgpu_device *adev,
216 				      struct kfd_local_mem_info *mem_info);
217 uint64_t amdgpu_amdkfd_get_gpu_clock_counter(struct amdgpu_device *adev);
218 
219 uint32_t amdgpu_amdkfd_get_max_engine_clock_in_mhz(struct amdgpu_device *adev);
220 void amdgpu_amdkfd_get_cu_info(struct amdgpu_device *adev,
221 			       struct kfd_cu_info *cu_info);
222 int amdgpu_amdkfd_get_dmabuf_info(struct amdgpu_device *adev, int dma_buf_fd,
223 				  struct amdgpu_device **dmabuf_adev,
224 				  uint64_t *bo_size, void *metadata_buffer,
225 				  size_t buffer_size, uint32_t *metadata_size,
226 				  uint32_t *flags);
227 uint8_t amdgpu_amdkfd_get_xgmi_hops_count(struct amdgpu_device *dst,
228 					  struct amdgpu_device *src);
229 int amdgpu_amdkfd_get_xgmi_bandwidth_mbytes(struct amdgpu_device *dst,
230 					    struct amdgpu_device *src,
231 					    bool is_min);
232 int amdgpu_amdkfd_get_pcie_bandwidth_mbytes(struct amdgpu_device *adev, bool is_min);
233 
234 /* Read user wptr from a specified user address space with page fault
235  * disabled. The memory must be pinned and mapped to the hardware when
236  * this is called in hqd_load functions, so it should never fault in
237  * the first place. This resolves a circular lock dependency involving
238  * four locks, including the DQM lock and mmap_lock.
239  */
240 #define read_user_wptr(mmptr, wptr, dst)				\
241 	({								\
242 		bool valid = false;					\
243 		if ((mmptr) && (wptr)) {				\
244 			pagefault_disable();				\
245 			if ((mmptr) == current->mm) {			\
246 				valid = !get_user((dst), (wptr));	\
247 			} else if (current->flags & PF_KTHREAD) {	\
248 				kthread_use_mm(mmptr);			\
249 				valid = !get_user((dst), (wptr));	\
250 				kthread_unuse_mm(mmptr);		\
251 			}						\
252 			pagefault_enable();				\
253 		}							\
254 		valid;							\
255 	})
256 
257 /* GPUVM API */
258 #define drm_priv_to_vm(drm_priv)					\
259 	(&((struct amdgpu_fpriv *)					\
260 		((struct drm_file *)(drm_priv))->driver_priv)->vm)
261 
262 int amdgpu_amdkfd_gpuvm_acquire_process_vm(struct amdgpu_device *adev,
263 					struct file *filp, u32 pasid,
264 					void **process_info,
265 					struct dma_fence **ef);
266 void amdgpu_amdkfd_gpuvm_release_process_vm(struct amdgpu_device *adev,
267 					void *drm_priv);
268 uint64_t amdgpu_amdkfd_gpuvm_get_process_page_dir(void *drm_priv);
269 int amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu(
270 		struct amdgpu_device *adev, uint64_t va, uint64_t size,
271 		void *drm_priv, struct kgd_mem **mem,
272 		uint64_t *offset, uint32_t flags, bool criu_resume);
273 int amdgpu_amdkfd_gpuvm_free_memory_of_gpu(
274 		struct amdgpu_device *adev, struct kgd_mem *mem, void *drm_priv,
275 		uint64_t *size);
276 int amdgpu_amdkfd_gpuvm_map_memory_to_gpu(
277 		struct amdgpu_device *adev, struct kgd_mem *mem, void *drm_priv,
278 		bool *table_freed);
279 int amdgpu_amdkfd_gpuvm_unmap_memory_from_gpu(
280 		struct amdgpu_device *adev, struct kgd_mem *mem, void *drm_priv);
281 int amdgpu_amdkfd_gpuvm_sync_memory(
282 		struct amdgpu_device *adev, struct kgd_mem *mem, bool intr);
283 int amdgpu_amdkfd_gpuvm_map_gtt_bo_to_kernel(struct amdgpu_device *adev,
284 		struct kgd_mem *mem, void **kptr, uint64_t *size);
285 void amdgpu_amdkfd_gpuvm_unmap_gtt_bo_from_kernel(struct amdgpu_device *adev,
286 		struct kgd_mem *mem);
287 
288 int amdgpu_amdkfd_gpuvm_restore_process_bos(void *process_info,
289 					    struct dma_fence **ef);
290 int amdgpu_amdkfd_gpuvm_get_vm_fault_info(struct amdgpu_device *adev,
291 					      struct kfd_vm_fault_info *info);
292 int amdgpu_amdkfd_gpuvm_import_dmabuf(struct amdgpu_device *adev,
293 				      struct dma_buf *dmabuf,
294 				      uint64_t va, void *drm_priv,
295 				      struct kgd_mem **mem, uint64_t *size,
296 				      uint64_t *mmap_offset);
297 int amdgpu_amdkfd_get_tile_config(struct amdgpu_device *adev,
298 				struct tile_config *config);
299 void amdgpu_amdkfd_ras_poison_consumption_handler(struct amdgpu_device *adev,
300 				bool reset);
301 bool amdgpu_amdkfd_bo_mapped_to_dev(struct amdgpu_device *adev, struct kgd_mem *mem);
302 void amdgpu_amdkfd_block_mmu_notifications(void *p);
303 int amdgpu_amdkfd_criu_resume(void *p);
304 
305 #if IS_ENABLED(CONFIG_HSA_AMD)
306 void amdgpu_amdkfd_gpuvm_init_mem_limits(void);
307 void amdgpu_amdkfd_gpuvm_destroy_cb(struct amdgpu_device *adev,
308 				struct amdgpu_vm *vm);
309 
310 /**
311  * @amdgpu_amdkfd_release_notify() - Notify KFD when GEM object is released
312  *
313  * Allows KFD to release its resources associated with the GEM object.
314  */
315 void amdgpu_amdkfd_release_notify(struct amdgpu_bo *bo);
316 void amdgpu_amdkfd_reserve_system_mem(uint64_t size);
317 #else
318 static inline
319 void amdgpu_amdkfd_gpuvm_init_mem_limits(void)
320 {
321 }
322 
323 static inline
324 void amdgpu_amdkfd_gpuvm_destroy_cb(struct amdgpu_device *adev,
325 					struct amdgpu_vm *vm)
326 {
327 }
328 
329 static inline
330 void amdgpu_amdkfd_release_notify(struct amdgpu_bo *bo)
331 {
332 }
333 #endif
334 /* KGD2KFD callbacks */
335 int kgd2kfd_quiesce_mm(struct mm_struct *mm);
336 int kgd2kfd_resume_mm(struct mm_struct *mm);
337 int kgd2kfd_schedule_evict_and_restore_process(struct mm_struct *mm,
338 						struct dma_fence *fence);
339 #if IS_ENABLED(CONFIG_HSA_AMD)
340 int kgd2kfd_init(void);
341 void kgd2kfd_exit(void);
342 struct kfd_dev *kgd2kfd_probe(struct amdgpu_device *adev, bool vf);
343 bool kgd2kfd_device_init(struct kfd_dev *kfd,
344 			 struct drm_device *ddev,
345 			 const struct kgd2kfd_shared_resources *gpu_resources);
346 void kgd2kfd_device_exit(struct kfd_dev *kfd);
347 void kgd2kfd_suspend(struct kfd_dev *kfd, bool run_pm);
348 int kgd2kfd_resume_iommu(struct kfd_dev *kfd);
349 int kgd2kfd_resume(struct kfd_dev *kfd, bool run_pm);
350 int kgd2kfd_pre_reset(struct kfd_dev *kfd);
351 int kgd2kfd_post_reset(struct kfd_dev *kfd);
352 void kgd2kfd_interrupt(struct kfd_dev *kfd, const void *ih_ring_entry);
353 void kgd2kfd_set_sram_ecc_flag(struct kfd_dev *kfd);
354 void kgd2kfd_smi_event_throttle(struct kfd_dev *kfd, uint64_t throttle_bitmask);
355 #else
356 static inline int kgd2kfd_init(void)
357 {
358 	return -ENOENT;
359 }
360 
361 static inline void kgd2kfd_exit(void)
362 {
363 }
364 
365 static inline
366 struct kfd_dev *kgd2kfd_probe(struct amdgpu_device *adev, bool vf)
367 {
368 	return NULL;
369 }
370 
371 static inline
372 bool kgd2kfd_device_init(struct kfd_dev *kfd, struct drm_device *ddev,
373 				const struct kgd2kfd_shared_resources *gpu_resources)
374 {
375 	return false;
376 }
377 
378 static inline void kgd2kfd_device_exit(struct kfd_dev *kfd)
379 {
380 }
381 
382 static inline void kgd2kfd_suspend(struct kfd_dev *kfd, bool run_pm)
383 {
384 }
385 
386 static int __maybe_unused kgd2kfd_resume_iommu(struct kfd_dev *kfd)
387 {
388 	return 0;
389 }
390 
391 static inline int kgd2kfd_resume(struct kfd_dev *kfd, bool run_pm)
392 {
393 	return 0;
394 }
395 
396 static inline int kgd2kfd_pre_reset(struct kfd_dev *kfd)
397 {
398 	return 0;
399 }
400 
401 static inline int kgd2kfd_post_reset(struct kfd_dev *kfd)
402 {
403 	return 0;
404 }
405 
406 static inline
407 void kgd2kfd_interrupt(struct kfd_dev *kfd, const void *ih_ring_entry)
408 {
409 }
410 
411 static inline
412 void kgd2kfd_set_sram_ecc_flag(struct kfd_dev *kfd)
413 {
414 }
415 
416 static inline
417 void kgd2kfd_smi_event_throttle(struct kfd_dev *kfd, uint64_t throttle_bitmask)
418 {
419 }
420 #endif
421 #endif /* AMDGPU_AMDKFD_H_INCLUDED */
422