1 /*
2 * Copyright 2016 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_VM_H__
25 #define __AMDGPU_VM_H__
26
27 #include <linux/idr.h>
28 #include <linux/kfifo.h>
29 #include <linux/rbtree.h>
30 #include <drm/gpu_scheduler.h>
31 #include <drm/drm_file.h>
32 #include <drm/ttm/ttm_bo.h>
33 #include <linux/sched/mm.h>
34
35 #include "amdgpu_sync.h"
36 #include "amdgpu_ring.h"
37 #include "amdgpu_ids.h"
38
39 struct amdgpu_bo_va;
40 struct amdgpu_job;
41 struct amdgpu_bo_list_entry;
42 struct amdgpu_bo_vm;
43
44 /*
45 * GPUVM handling
46 */
47
48 /* Maximum number of PTEs the hardware can write with one command */
49 #define AMDGPU_VM_MAX_UPDATE_SIZE 0x3FFFF
50
51 /* number of entries in page table */
52 #define AMDGPU_VM_PTE_COUNT(adev) (1 << (adev)->vm_manager.block_size)
53
54 #define AMDGPU_PTE_VALID (1ULL << 0)
55 #define AMDGPU_PTE_SYSTEM (1ULL << 1)
56 #define AMDGPU_PTE_SNOOPED (1ULL << 2)
57
58 /* RV+ */
59 #define AMDGPU_PTE_TMZ (1ULL << 3)
60
61 /* VI only */
62 #define AMDGPU_PTE_EXECUTABLE (1ULL << 4)
63
64 #define AMDGPU_PTE_READABLE (1ULL << 5)
65 #define AMDGPU_PTE_WRITEABLE (1ULL << 6)
66
67 #define AMDGPU_PTE_FRAG(x) ((x & 0x1fULL) << 7)
68
69 /* TILED for VEGA10, reserved for older ASICs */
70 #define AMDGPU_PTE_PRT (1ULL << 51)
71
72 /* PDE is handled as PTE for VEGA10 */
73 #define AMDGPU_PDE_PTE (1ULL << 54)
74
75 #define AMDGPU_PTE_LOG (1ULL << 55)
76
77 /* PTE is handled as PDE for VEGA10 (Translate Further) */
78 #define AMDGPU_PTE_TF (1ULL << 56)
79
80 /* MALL noalloc for sienna_cichlid, reserved for older ASICs */
81 #define AMDGPU_PTE_NOALLOC (1ULL << 58)
82
83 /* PDE Block Fragment Size for VEGA10 */
84 #define AMDGPU_PDE_BFS(a) ((uint64_t)a << 59)
85
86
87 /* For GFX9 */
88 #define AMDGPU_PTE_MTYPE_VG10(a) ((uint64_t)(a) << 57)
89 #define AMDGPU_PTE_MTYPE_VG10_MASK AMDGPU_PTE_MTYPE_VG10(3ULL)
90
91 #define AMDGPU_MTYPE_NC 0
92 #define AMDGPU_MTYPE_CC 2
93
94 #define AMDGPU_PTE_DEFAULT_ATC (AMDGPU_PTE_SYSTEM \
95 | AMDGPU_PTE_SNOOPED \
96 | AMDGPU_PTE_EXECUTABLE \
97 | AMDGPU_PTE_READABLE \
98 | AMDGPU_PTE_WRITEABLE \
99 | AMDGPU_PTE_MTYPE_VG10(AMDGPU_MTYPE_CC))
100
101 /* gfx10 */
102 #define AMDGPU_PTE_MTYPE_NV10(a) ((uint64_t)(a) << 48)
103 #define AMDGPU_PTE_MTYPE_NV10_MASK AMDGPU_PTE_MTYPE_NV10(7ULL)
104
105 /* How to program VM fault handling */
106 #define AMDGPU_VM_FAULT_STOP_NEVER 0
107 #define AMDGPU_VM_FAULT_STOP_FIRST 1
108 #define AMDGPU_VM_FAULT_STOP_ALWAYS 2
109
110 /* Reserve 4MB VRAM for page tables */
111 #define AMDGPU_VM_RESERVED_VRAM (8ULL << 20)
112
113 /* max number of VMHUB */
114 #define AMDGPU_MAX_VMHUBS 3
115 #define AMDGPU_GFXHUB_0 0
116 #define AMDGPU_MMHUB_0 1
117 #define AMDGPU_MMHUB_1 2
118
119 /* Reserve 2MB at top/bottom of address space for kernel use */
120 #define AMDGPU_VA_RESERVED_SIZE (2ULL << 20)
121
122 /* See vm_update_mode */
123 #define AMDGPU_VM_USE_CPU_FOR_GFX (1 << 0)
124 #define AMDGPU_VM_USE_CPU_FOR_COMPUTE (1 << 1)
125
126 /* VMPT level enumerate, and the hiberachy is:
127 * PDB2->PDB1->PDB0->PTB
128 */
129 enum amdgpu_vm_level {
130 AMDGPU_VM_PDB2,
131 AMDGPU_VM_PDB1,
132 AMDGPU_VM_PDB0,
133 AMDGPU_VM_PTB
134 };
135
136 /* base structure for tracking BO usage in a VM */
137 struct amdgpu_vm_bo_base {
138 /* constant after initialization */
139 struct amdgpu_vm *vm;
140 struct amdgpu_bo *bo;
141
142 /* protected by bo being reserved */
143 struct amdgpu_vm_bo_base *next;
144
145 /* protected by spinlock */
146 struct list_head vm_status;
147
148 /* protected by the BO being reserved */
149 bool moved;
150 };
151
152 /* provided by hw blocks that can write ptes, e.g., sdma */
153 struct amdgpu_vm_pte_funcs {
154 /* number of dw to reserve per operation */
155 unsigned copy_pte_num_dw;
156
157 /* copy pte entries from GART */
158 void (*copy_pte)(struct amdgpu_ib *ib,
159 uint64_t pe, uint64_t src,
160 unsigned count);
161
162 /* write pte one entry at a time with addr mapping */
163 void (*write_pte)(struct amdgpu_ib *ib, uint64_t pe,
164 uint64_t value, unsigned count,
165 uint32_t incr);
166 /* for linear pte/pde updates without addr mapping */
167 void (*set_pte_pde)(struct amdgpu_ib *ib,
168 uint64_t pe,
169 uint64_t addr, unsigned count,
170 uint32_t incr, uint64_t flags);
171 };
172
173 struct amdgpu_task_info {
174 char process_name[TASK_COMM_LEN];
175 char task_name[TASK_COMM_LEN];
176 pid_t pid;
177 pid_t tgid;
178 };
179
180 /**
181 * struct amdgpu_vm_update_params
182 *
183 * Encapsulate some VM table update parameters to reduce
184 * the number of function parameters
185 *
186 */
187 struct amdgpu_vm_update_params {
188
189 /**
190 * @adev: amdgpu device we do this update for
191 */
192 struct amdgpu_device *adev;
193
194 /**
195 * @vm: optional amdgpu_vm we do this update for
196 */
197 struct amdgpu_vm *vm;
198
199 /**
200 * @immediate: if changes should be made immediately
201 */
202 bool immediate;
203
204 /**
205 * @unlocked: true if the root BO is not locked
206 */
207 bool unlocked;
208
209 /**
210 * @pages_addr:
211 *
212 * DMA addresses to use for mapping
213 */
214 dma_addr_t *pages_addr;
215
216 /**
217 * @job: job to used for hw submission
218 */
219 struct amdgpu_job *job;
220
221 /**
222 * @num_dw_left: number of dw left for the IB
223 */
224 unsigned int num_dw_left;
225
226 /**
227 * @table_freed: return true if page table is freed when updating
228 */
229 bool table_freed;
230 };
231
232 struct amdgpu_vm_update_funcs {
233 int (*map_table)(struct amdgpu_bo_vm *bo);
234 int (*prepare)(struct amdgpu_vm_update_params *p, struct dma_resv *resv,
235 enum amdgpu_sync_mode sync_mode);
236 int (*update)(struct amdgpu_vm_update_params *p,
237 struct amdgpu_bo_vm *bo, uint64_t pe, uint64_t addr,
238 unsigned count, uint32_t incr, uint64_t flags);
239 int (*commit)(struct amdgpu_vm_update_params *p,
240 struct dma_fence **fence);
241 };
242
243 struct amdgpu_vm {
244 /* tree of virtual addresses mapped */
245 struct rb_root_cached va;
246
247 /* Lock to prevent eviction while we are updating page tables
248 * use vm_eviction_lock/unlock(vm)
249 */
250 struct mutex eviction_lock;
251 bool evicting;
252 unsigned int saved_flags;
253
254 /* Lock to protect vm_bo add/del/move on all lists of vm */
255 spinlock_t status_lock;
256
257 /* BOs who needs a validation */
258 struct list_head evicted;
259
260 /* PT BOs which relocated and their parent need an update */
261 struct list_head relocated;
262
263 /* per VM BOs moved, but not yet updated in the PT */
264 struct list_head moved;
265
266 /* All BOs of this VM not currently in the state machine */
267 struct list_head idle;
268
269 /* regular invalidated BOs, but not yet updated in the PT */
270 struct list_head invalidated;
271
272 /* BO mappings freed, but not yet updated in the PT */
273 struct list_head freed;
274
275 /* BOs which are invalidated, has been updated in the PTs */
276 struct list_head done;
277
278 /* PT BOs scheduled to free and fill with zero if vm_resv is not hold */
279 struct list_head pt_freed;
280 struct work_struct pt_free_work;
281
282 /* contains the page directory */
283 struct amdgpu_vm_bo_base root;
284 struct dma_fence *last_update;
285
286 /* Scheduler entities for page table updates */
287 struct drm_sched_entity immediate;
288 struct drm_sched_entity delayed;
289
290 /* Last finished delayed update */
291 atomic64_t tlb_seq;
292 struct dma_fence *last_tlb_flush;
293
294 /* Last unlocked submission to the scheduler entities */
295 struct dma_fence *last_unlocked;
296
297 unsigned int pasid;
298 bool reserved_vmid[AMDGPU_MAX_VMHUBS];
299
300 /* Flag to indicate if VM tables are updated by CPU or GPU (SDMA) */
301 bool use_cpu_for_update;
302
303 /* Functions to use for VM table updates */
304 const struct amdgpu_vm_update_funcs *update_funcs;
305
306 /* Flag to indicate ATS support from PTE for GFX9 */
307 bool pte_support_ats;
308
309 /* Up to 128 pending retry page faults */
310 DECLARE_KFIFO(faults, u64, 128);
311
312 /* Points to the KFD process VM info */
313 struct amdkfd_process_info *process_info;
314
315 /* List node in amdkfd_process_info.vm_list_head */
316 struct list_head vm_list_node;
317
318 /* Valid while the PD is reserved or fenced */
319 uint64_t pd_phys_addr;
320
321 /* Some basic info about the task */
322 struct amdgpu_task_info task_info;
323
324 /* Store positions of group of BOs */
325 struct ttm_lru_bulk_move lru_bulk_move;
326 /* Flag to indicate if VM is used for compute */
327 bool is_compute_context;
328 };
329
330 struct amdgpu_vm_manager {
331 /* Handling of VMIDs */
332 struct amdgpu_vmid_mgr id_mgr[AMDGPU_MAX_VMHUBS];
333 unsigned int first_kfd_vmid;
334 bool concurrent_flush;
335
336 /* Handling of VM fences */
337 u64 fence_context;
338 unsigned seqno[AMDGPU_MAX_RINGS];
339
340 uint64_t max_pfn;
341 uint32_t num_level;
342 uint32_t block_size;
343 uint32_t fragment_size;
344 enum amdgpu_vm_level root_level;
345 /* vram base address for page table entry */
346 u64 vram_base_offset;
347 /* vm pte handling */
348 const struct amdgpu_vm_pte_funcs *vm_pte_funcs;
349 struct drm_gpu_scheduler *vm_pte_scheds[AMDGPU_MAX_RINGS];
350 unsigned vm_pte_num_scheds;
351 struct amdgpu_ring *page_fault;
352
353 /* partial resident texture handling */
354 spinlock_t prt_lock;
355 atomic_t num_prt_users;
356
357 /* controls how VM page tables are updated for Graphics and Compute.
358 * BIT0[= 0] Graphics updated by SDMA [= 1] by CPU
359 * BIT1[= 0] Compute updated by SDMA [= 1] by CPU
360 */
361 int vm_update_mode;
362
363 /* PASID to VM mapping, will be used in interrupt context to
364 * look up VM of a page fault
365 */
366 struct xarray pasids;
367 };
368
369 struct amdgpu_bo_va_mapping;
370
371 #define amdgpu_vm_copy_pte(adev, ib, pe, src, count) ((adev)->vm_manager.vm_pte_funcs->copy_pte((ib), (pe), (src), (count)))
372 #define amdgpu_vm_write_pte(adev, ib, pe, value, count, incr) ((adev)->vm_manager.vm_pte_funcs->write_pte((ib), (pe), (value), (count), (incr)))
373 #define amdgpu_vm_set_pte_pde(adev, ib, pe, addr, count, incr, flags) ((adev)->vm_manager.vm_pte_funcs->set_pte_pde((ib), (pe), (addr), (count), (incr), (flags)))
374
375 extern const struct amdgpu_vm_update_funcs amdgpu_vm_cpu_funcs;
376 extern const struct amdgpu_vm_update_funcs amdgpu_vm_sdma_funcs;
377
378 void amdgpu_vm_manager_init(struct amdgpu_device *adev);
379 void amdgpu_vm_manager_fini(struct amdgpu_device *adev);
380
381 int amdgpu_vm_set_pasid(struct amdgpu_device *adev, struct amdgpu_vm *vm,
382 u32 pasid);
383
384 long amdgpu_vm_wait_idle(struct amdgpu_vm *vm, long timeout);
385 int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm);
386 int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm);
387 void amdgpu_vm_release_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm);
388 void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm);
389 void amdgpu_vm_get_pd_bo(struct amdgpu_vm *vm,
390 struct list_head *validated,
391 struct amdgpu_bo_list_entry *entry);
392 bool amdgpu_vm_ready(struct amdgpu_vm *vm);
393 int amdgpu_vm_validate_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm,
394 int (*callback)(void *p, struct amdgpu_bo *bo),
395 void *param);
396 int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job, bool need_pipe_sync);
397 int amdgpu_vm_update_pdes(struct amdgpu_device *adev,
398 struct amdgpu_vm *vm, bool immediate);
399 int amdgpu_vm_clear_freed(struct amdgpu_device *adev,
400 struct amdgpu_vm *vm,
401 struct dma_fence **fence);
402 int amdgpu_vm_handle_moved(struct amdgpu_device *adev,
403 struct amdgpu_vm *vm);
404 void amdgpu_vm_bo_base_init(struct amdgpu_vm_bo_base *base,
405 struct amdgpu_vm *vm, struct amdgpu_bo *bo);
406 int amdgpu_vm_update_range(struct amdgpu_device *adev, struct amdgpu_vm *vm,
407 bool immediate, bool unlocked, bool flush_tlb,
408 struct dma_resv *resv, uint64_t start, uint64_t last,
409 uint64_t flags, uint64_t offset, uint64_t vram_base,
410 struct ttm_resource *res, dma_addr_t *pages_addr,
411 struct dma_fence **fence);
412 int amdgpu_vm_bo_update(struct amdgpu_device *adev,
413 struct amdgpu_bo_va *bo_va,
414 bool clear);
415 bool amdgpu_vm_evictable(struct amdgpu_bo *bo);
416 void amdgpu_vm_bo_invalidate(struct amdgpu_device *adev,
417 struct amdgpu_bo *bo, bool evicted);
418 uint64_t amdgpu_vm_map_gart(const dma_addr_t *pages_addr, uint64_t addr);
419 struct amdgpu_bo_va *amdgpu_vm_bo_find(struct amdgpu_vm *vm,
420 struct amdgpu_bo *bo);
421 struct amdgpu_bo_va *amdgpu_vm_bo_add(struct amdgpu_device *adev,
422 struct amdgpu_vm *vm,
423 struct amdgpu_bo *bo);
424 int amdgpu_vm_bo_map(struct amdgpu_device *adev,
425 struct amdgpu_bo_va *bo_va,
426 uint64_t addr, uint64_t offset,
427 uint64_t size, uint64_t flags);
428 int amdgpu_vm_bo_replace_map(struct amdgpu_device *adev,
429 struct amdgpu_bo_va *bo_va,
430 uint64_t addr, uint64_t offset,
431 uint64_t size, uint64_t flags);
432 int amdgpu_vm_bo_unmap(struct amdgpu_device *adev,
433 struct amdgpu_bo_va *bo_va,
434 uint64_t addr);
435 int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev,
436 struct amdgpu_vm *vm,
437 uint64_t saddr, uint64_t size);
438 struct amdgpu_bo_va_mapping *amdgpu_vm_bo_lookup_mapping(struct amdgpu_vm *vm,
439 uint64_t addr);
440 void amdgpu_vm_bo_trace_cs(struct amdgpu_vm *vm, struct ww_acquire_ctx *ticket);
441 void amdgpu_vm_bo_del(struct amdgpu_device *adev,
442 struct amdgpu_bo_va *bo_va);
443 void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t min_vm_size,
444 uint32_t fragment_size_default, unsigned max_level,
445 unsigned max_bits);
446 int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp);
447 bool amdgpu_vm_need_pipeline_sync(struct amdgpu_ring *ring,
448 struct amdgpu_job *job);
449 void amdgpu_vm_check_compute_bug(struct amdgpu_device *adev);
450
451 void amdgpu_vm_get_task_info(struct amdgpu_device *adev, u32 pasid,
452 struct amdgpu_task_info *task_info);
453 bool amdgpu_vm_handle_fault(struct amdgpu_device *adev, u32 pasid,
454 uint64_t addr, bool write_fault);
455
456 void amdgpu_vm_set_task_info(struct amdgpu_vm *vm);
457
458 void amdgpu_vm_move_to_lru_tail(struct amdgpu_device *adev,
459 struct amdgpu_vm *vm);
460 void amdgpu_vm_get_memory(struct amdgpu_vm *vm, uint64_t *vram_mem,
461 uint64_t *gtt_mem, uint64_t *cpu_mem);
462
463 int amdgpu_vm_pt_clear(struct amdgpu_device *adev, struct amdgpu_vm *vm,
464 struct amdgpu_bo_vm *vmbo, bool immediate);
465 int amdgpu_vm_pt_create(struct amdgpu_device *adev, struct amdgpu_vm *vm,
466 int level, bool immediate, struct amdgpu_bo_vm **vmbo);
467 void amdgpu_vm_pt_free_root(struct amdgpu_device *adev, struct amdgpu_vm *vm);
468 bool amdgpu_vm_pt_is_root_clean(struct amdgpu_device *adev,
469 struct amdgpu_vm *vm);
470
471 int amdgpu_vm_pde_update(struct amdgpu_vm_update_params *params,
472 struct amdgpu_vm_bo_base *entry);
473 int amdgpu_vm_ptes_update(struct amdgpu_vm_update_params *params,
474 uint64_t start, uint64_t end,
475 uint64_t dst, uint64_t flags);
476 void amdgpu_vm_pt_free_work(struct work_struct *work);
477
478 #if defined(CONFIG_DEBUG_FS)
479 void amdgpu_debugfs_vm_bo_info(struct amdgpu_vm *vm, struct seq_file *m);
480 #endif
481
482 /**
483 * amdgpu_vm_tlb_seq - return tlb flush sequence number
484 * @vm: the amdgpu_vm structure to query
485 *
486 * Returns the tlb flush sequence number which indicates that the VM TLBs needs
487 * to be invalidated whenever the sequence number change.
488 */
amdgpu_vm_tlb_seq(struct amdgpu_vm * vm)489 static inline uint64_t amdgpu_vm_tlb_seq(struct amdgpu_vm *vm)
490 {
491 unsigned long flags;
492 spinlock_t *lock;
493
494 /*
495 * Workaround to stop racing between the fence signaling and handling
496 * the cb. The lock is static after initially setting it up, just make
497 * sure that the dma_fence structure isn't freed up.
498 */
499 rcu_read_lock();
500 lock = vm->last_tlb_flush->lock;
501 rcu_read_unlock();
502
503 spin_lock_irqsave(lock, flags);
504 spin_unlock_irqrestore(lock, flags);
505
506 return atomic64_read(&vm->tlb_seq);
507 }
508
509 /*
510 * vm eviction_lock can be taken in MMU notifiers. Make sure no reclaim-FS
511 * happens while holding this lock anywhere to prevent deadlocks when
512 * an MMU notifier runs in reclaim-FS context.
513 */
amdgpu_vm_eviction_lock(struct amdgpu_vm * vm)514 static inline void amdgpu_vm_eviction_lock(struct amdgpu_vm *vm)
515 {
516 mutex_lock(&vm->eviction_lock);
517 vm->saved_flags = memalloc_noreclaim_save();
518 }
519
amdgpu_vm_eviction_trylock(struct amdgpu_vm * vm)520 static inline bool amdgpu_vm_eviction_trylock(struct amdgpu_vm *vm)
521 {
522 if (mutex_trylock(&vm->eviction_lock)) {
523 vm->saved_flags = memalloc_noreclaim_save();
524 return true;
525 }
526 return false;
527 }
528
amdgpu_vm_eviction_unlock(struct amdgpu_vm * vm)529 static inline void amdgpu_vm_eviction_unlock(struct amdgpu_vm *vm)
530 {
531 memalloc_noreclaim_restore(vm->saved_flags);
532 mutex_unlock(&vm->eviction_lock);
533 }
534
535 #endif
536