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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
39struct drm_exec;
40
41struct amdgpu_bo_va;
42struct amdgpu_job;
43struct amdgpu_bo_list_entry;
44struct amdgpu_bo_vm;
45struct amdgpu_mem_stats;
46
47/*
48 * GPUVM handling
49 */
50
51/* Maximum number of PTEs the hardware can write with one command */
52#define AMDGPU_VM_MAX_UPDATE_SIZE 0x3FFFF
53
54/* number of entries in page table */
55#define AMDGPU_VM_PTE_COUNT(adev) (1 << (adev)->vm_manager.block_size)
56
57#define AMDGPU_PTE_VALID (1ULL << 0)
58#define AMDGPU_PTE_SYSTEM (1ULL << 1)
59#define AMDGPU_PTE_SNOOPED (1ULL << 2)
60
61/* RV+ */
62#define AMDGPU_PTE_TMZ (1ULL << 3)
63
64/* VI only */
65#define AMDGPU_PTE_EXECUTABLE (1ULL << 4)
66
67#define AMDGPU_PTE_READABLE (1ULL << 5)
68#define AMDGPU_PTE_WRITEABLE (1ULL << 6)
69
70#define AMDGPU_PTE_FRAG(x) ((x & 0x1fULL) << 7)
71
72/* TILED for VEGA10, reserved for older ASICs */
73#define AMDGPU_PTE_PRT (1ULL << 51)
74
75/* PDE is handled as PTE for VEGA10 */
76#define AMDGPU_PDE_PTE (1ULL << 54)
77
78#define AMDGPU_PTE_LOG (1ULL << 55)
79
80/* PTE is handled as PDE for VEGA10 (Translate Further) */
81#define AMDGPU_PTE_TF (1ULL << 56)
82
83/* MALL noalloc for sienna_cichlid, reserved for older ASICs */
84#define AMDGPU_PTE_NOALLOC (1ULL << 58)
85
86/* PDE Block Fragment Size for VEGA10 */
87#define AMDGPU_PDE_BFS(a) ((uint64_t)a << 59)
88
89/* Flag combination to set no-retry with TF disabled */
90#define AMDGPU_VM_NORETRY_FLAGS (AMDGPU_PTE_EXECUTABLE | AMDGPU_PDE_PTE | \
91 AMDGPU_PTE_TF)
92
93/* Flag combination to set no-retry with TF enabled */
94#define AMDGPU_VM_NORETRY_FLAGS_TF (AMDGPU_PTE_VALID | AMDGPU_PTE_SYSTEM | \
95 AMDGPU_PTE_PRT)
96/* For GFX9 */
97#define AMDGPU_PTE_MTYPE_VG10(a) ((uint64_t)(a) << 57)
98#define AMDGPU_PTE_MTYPE_VG10_MASK AMDGPU_PTE_MTYPE_VG10(3ULL)
99
100#define AMDGPU_MTYPE_NC 0
101#define AMDGPU_MTYPE_CC 2
102
103#define AMDGPU_PTE_DEFAULT_ATC (AMDGPU_PTE_SYSTEM \
104 | AMDGPU_PTE_SNOOPED \
105 | AMDGPU_PTE_EXECUTABLE \
106 | AMDGPU_PTE_READABLE \
107 | AMDGPU_PTE_WRITEABLE \
108 | AMDGPU_PTE_MTYPE_VG10(AMDGPU_MTYPE_CC))
109
110/* gfx10 */
111#define AMDGPU_PTE_MTYPE_NV10(a) ((uint64_t)(a) << 48)
112#define AMDGPU_PTE_MTYPE_NV10_MASK AMDGPU_PTE_MTYPE_NV10(7ULL)
113
114/* How to program VM fault handling */
115#define AMDGPU_VM_FAULT_STOP_NEVER 0
116#define AMDGPU_VM_FAULT_STOP_FIRST 1
117#define AMDGPU_VM_FAULT_STOP_ALWAYS 2
118
119/* How much VRAM be reserved for page tables */
120#define AMDGPU_VM_RESERVED_VRAM (8ULL << 20)
121
122/*
123 * max number of VMHUB
124 * layout: max 8 GFXHUB + 4 MMHUB0 + 1 MMHUB1
125 */
126#define AMDGPU_MAX_VMHUBS 13
127#define AMDGPU_GFXHUB_START 0
128#define AMDGPU_MMHUB0_START 8
129#define AMDGPU_MMHUB1_START 12
130#define AMDGPU_GFXHUB(x) (AMDGPU_GFXHUB_START + (x))
131#define AMDGPU_MMHUB0(x) (AMDGPU_MMHUB0_START + (x))
132#define AMDGPU_MMHUB1(x) (AMDGPU_MMHUB1_START + (x))
133
134#define AMDGPU_IS_GFXHUB(x) ((x) >= AMDGPU_GFXHUB_START && (x) < AMDGPU_MMHUB0_START)
135#define AMDGPU_IS_MMHUB0(x) ((x) >= AMDGPU_MMHUB0_START && (x) < AMDGPU_MMHUB1_START)
136#define AMDGPU_IS_MMHUB1(x) ((x) >= AMDGPU_MMHUB1_START && (x) < AMDGPU_MAX_VMHUBS)
137
138/* Reserve space at top/bottom of address space for kernel use */
139#define AMDGPU_VA_RESERVED_CSA_SIZE (2ULL << 20)
140#define AMDGPU_VA_RESERVED_CSA_START(adev) (((adev)->vm_manager.max_pfn \
141 << AMDGPU_GPU_PAGE_SHIFT) \
142 - AMDGPU_VA_RESERVED_CSA_SIZE)
143#define AMDGPU_VA_RESERVED_SEQ64_SIZE (2ULL << 20)
144#define AMDGPU_VA_RESERVED_SEQ64_START(adev) (AMDGPU_VA_RESERVED_CSA_START(adev) \
145 - AMDGPU_VA_RESERVED_SEQ64_SIZE)
146#define AMDGPU_VA_RESERVED_TRAP_SIZE (2ULL << 12)
147#define AMDGPU_VA_RESERVED_TRAP_START(adev) (AMDGPU_VA_RESERVED_SEQ64_START(adev) \
148 - AMDGPU_VA_RESERVED_TRAP_SIZE)
149#define AMDGPU_VA_RESERVED_BOTTOM (1ULL << 16)
150#define AMDGPU_VA_RESERVED_TOP (AMDGPU_VA_RESERVED_TRAP_SIZE + \
151 AMDGPU_VA_RESERVED_SEQ64_SIZE + \
152 AMDGPU_VA_RESERVED_CSA_SIZE)
153
154/* See vm_update_mode */
155#define AMDGPU_VM_USE_CPU_FOR_GFX (1 << 0)
156#define AMDGPU_VM_USE_CPU_FOR_COMPUTE (1 << 1)
157
158/* VMPT level enumerate, and the hiberachy is:
159 * PDB2->PDB1->PDB0->PTB
160 */
161enum amdgpu_vm_level {
162 AMDGPU_VM_PDB2,
163 AMDGPU_VM_PDB1,
164 AMDGPU_VM_PDB0,
165 AMDGPU_VM_PTB
166};
167
168/* base structure for tracking BO usage in a VM */
169struct amdgpu_vm_bo_base {
170 /* constant after initialization */
171 struct amdgpu_vm *vm;
172 struct amdgpu_bo *bo;
173
174 /* protected by bo being reserved */
175 struct amdgpu_vm_bo_base *next;
176
177 /* protected by spinlock */
178 struct list_head vm_status;
179
180 /* protected by the BO being reserved */
181 bool moved;
182};
183
184/* provided by hw blocks that can write ptes, e.g., sdma */
185struct amdgpu_vm_pte_funcs {
186 /* number of dw to reserve per operation */
187 unsigned copy_pte_num_dw;
188
189 /* copy pte entries from GART */
190 void (*copy_pte)(struct amdgpu_ib *ib,
191 uint64_t pe, uint64_t src,
192 unsigned count);
193
194 /* write pte one entry at a time with addr mapping */
195 void (*write_pte)(struct amdgpu_ib *ib, uint64_t pe,
196 uint64_t value, unsigned count,
197 uint32_t incr);
198 /* for linear pte/pde updates without addr mapping */
199 void (*set_pte_pde)(struct amdgpu_ib *ib,
200 uint64_t pe,
201 uint64_t addr, unsigned count,
202 uint32_t incr, uint64_t flags);
203};
204
205struct amdgpu_task_info {
206 char process_name[TASK_COMM_LEN];
207 char task_name[TASK_COMM_LEN];
208 pid_t pid;
209 pid_t tgid;
210 struct kref refcount;
211};
212
213/**
214 * struct amdgpu_vm_update_params
215 *
216 * Encapsulate some VM table update parameters to reduce
217 * the number of function parameters
218 *
219 */
220struct amdgpu_vm_update_params {
221
222 /**
223 * @adev: amdgpu device we do this update for
224 */
225 struct amdgpu_device *adev;
226
227 /**
228 * @vm: optional amdgpu_vm we do this update for
229 */
230 struct amdgpu_vm *vm;
231
232 /**
233 * @immediate: if changes should be made immediately
234 */
235 bool immediate;
236
237 /**
238 * @unlocked: true if the root BO is not locked
239 */
240 bool unlocked;
241
242 /**
243 * @pages_addr:
244 *
245 * DMA addresses to use for mapping
246 */
247 dma_addr_t *pages_addr;
248
249 /**
250 * @job: job to used for hw submission
251 */
252 struct amdgpu_job *job;
253
254 /**
255 * @num_dw_left: number of dw left for the IB
256 */
257 unsigned int num_dw_left;
258
259 /**
260 * @table_freed: return true if page table is freed when updating
261 */
262 bool table_freed;
263
264 /**
265 * @allow_override: true for memory that is not uncached: allows MTYPE
266 * to be overridden for NUMA local memory.
267 */
268 bool allow_override;
269};
270
271struct amdgpu_vm_update_funcs {
272 int (*map_table)(struct amdgpu_bo_vm *bo);
273 int (*prepare)(struct amdgpu_vm_update_params *p, struct dma_resv *resv,
274 enum amdgpu_sync_mode sync_mode);
275 int (*update)(struct amdgpu_vm_update_params *p,
276 struct amdgpu_bo_vm *bo, uint64_t pe, uint64_t addr,
277 unsigned count, uint32_t incr, uint64_t flags);
278 int (*commit)(struct amdgpu_vm_update_params *p,
279 struct dma_fence **fence);
280};
281
282struct amdgpu_vm_fault_info {
283 /* fault address */
284 uint64_t addr;
285 /* fault status register */
286 uint32_t status;
287 /* which vmhub? gfxhub, mmhub, etc. */
288 unsigned int vmhub;
289};
290
291struct amdgpu_vm {
292 /* tree of virtual addresses mapped */
293 struct rb_root_cached va;
294
295 /* Lock to prevent eviction while we are updating page tables
296 * use vm_eviction_lock/unlock(vm)
297 */
298 struct mutex eviction_lock;
299 bool evicting;
300 unsigned int saved_flags;
301
302 /* Lock to protect vm_bo add/del/move on all lists of vm */
303 spinlock_t status_lock;
304
305 /* Per-VM and PT BOs who needs a validation */
306 struct list_head evicted;
307
308 /* BOs for user mode queues that need a validation */
309 struct list_head evicted_user;
310
311 /* PT BOs which relocated and their parent need an update */
312 struct list_head relocated;
313
314 /* per VM BOs moved, but not yet updated in the PT */
315 struct list_head moved;
316
317 /* All BOs of this VM not currently in the state machine */
318 struct list_head idle;
319
320 /* regular invalidated BOs, but not yet updated in the PT */
321 struct list_head invalidated;
322
323 /* BO mappings freed, but not yet updated in the PT */
324 struct list_head freed;
325
326 /* BOs which are invalidated, has been updated in the PTs */
327 struct list_head done;
328
329 /* PT BOs scheduled to free and fill with zero if vm_resv is not hold */
330 struct list_head pt_freed;
331 struct work_struct pt_free_work;
332
333 /* contains the page directory */
334 struct amdgpu_vm_bo_base root;
335 struct dma_fence *last_update;
336
337 /* Scheduler entities for page table updates */
338 struct drm_sched_entity immediate;
339 struct drm_sched_entity delayed;
340
341 /* Last finished delayed update */
342 atomic64_t tlb_seq;
343 struct dma_fence *last_tlb_flush;
344 atomic64_t kfd_last_flushed_seq;
345
346 /* How many times we had to re-generate the page tables */
347 uint64_t generation;
348
349 /* Last unlocked submission to the scheduler entities */
350 struct dma_fence *last_unlocked;
351
352 unsigned int pasid;
353 bool reserved_vmid[AMDGPU_MAX_VMHUBS];
354
355 /* Flag to indicate if VM tables are updated by CPU or GPU (SDMA) */
356 bool use_cpu_for_update;
357
358 /* Functions to use for VM table updates */
359 const struct amdgpu_vm_update_funcs *update_funcs;
360
361 /* Up to 128 pending retry page faults */
362 DECLARE_KFIFO(faults, u64, 128);
363
364 /* Points to the KFD process VM info */
365 struct amdkfd_process_info *process_info;
366
367 /* List node in amdkfd_process_info.vm_list_head */
368 struct list_head vm_list_node;
369
370 /* Valid while the PD is reserved or fenced */
371 uint64_t pd_phys_addr;
372
373 /* Some basic info about the task */
374 struct amdgpu_task_info *task_info;
375
376 /* Store positions of group of BOs */
377 struct ttm_lru_bulk_move lru_bulk_move;
378 /* Flag to indicate if VM is used for compute */
379 bool is_compute_context;
380
381 /* Memory partition number, -1 means any partition */
382 int8_t mem_id;
383
384 /* cached fault info */
385 struct amdgpu_vm_fault_info fault_info;
386};
387
388struct amdgpu_vm_manager {
389 /* Handling of VMIDs */
390 struct amdgpu_vmid_mgr id_mgr[AMDGPU_MAX_VMHUBS];
391 unsigned int first_kfd_vmid;
392 bool concurrent_flush;
393
394 /* Handling of VM fences */
395 u64 fence_context;
396 unsigned seqno[AMDGPU_MAX_RINGS];
397
398 uint64_t max_pfn;
399 uint32_t num_level;
400 uint32_t block_size;
401 uint32_t fragment_size;
402 enum amdgpu_vm_level root_level;
403 /* vram base address for page table entry */
404 u64 vram_base_offset;
405 /* vm pte handling */
406 const struct amdgpu_vm_pte_funcs *vm_pte_funcs;
407 struct drm_gpu_scheduler *vm_pte_scheds[AMDGPU_MAX_RINGS];
408 unsigned vm_pte_num_scheds;
409 struct amdgpu_ring *page_fault;
410
411 /* partial resident texture handling */
412 spinlock_t prt_lock;
413 atomic_t num_prt_users;
414
415 /* controls how VM page tables are updated for Graphics and Compute.
416 * BIT0[= 0] Graphics updated by SDMA [= 1] by CPU
417 * BIT1[= 0] Compute updated by SDMA [= 1] by CPU
418 */
419 int vm_update_mode;
420
421 /* PASID to VM mapping, will be used in interrupt context to
422 * look up VM of a page fault
423 */
424 struct xarray pasids;
425};
426
427struct amdgpu_bo_va_mapping;
428
429#define amdgpu_vm_copy_pte(adev, ib, pe, src, count) ((adev)->vm_manager.vm_pte_funcs->copy_pte((ib), (pe), (src), (count)))
430#define amdgpu_vm_write_pte(adev, ib, pe, value, count, incr) ((adev)->vm_manager.vm_pte_funcs->write_pte((ib), (pe), (value), (count), (incr)))
431#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)))
432
433extern const struct amdgpu_vm_update_funcs amdgpu_vm_cpu_funcs;
434extern const struct amdgpu_vm_update_funcs amdgpu_vm_sdma_funcs;
435
436void amdgpu_vm_manager_init(struct amdgpu_device *adev);
437void amdgpu_vm_manager_fini(struct amdgpu_device *adev);
438
439int amdgpu_vm_set_pasid(struct amdgpu_device *adev, struct amdgpu_vm *vm,
440 u32 pasid);
441
442long amdgpu_vm_wait_idle(struct amdgpu_vm *vm, long timeout);
443int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm, int32_t xcp_id);
444int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm);
445void amdgpu_vm_release_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm);
446void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm);
447int amdgpu_vm_lock_pd(struct amdgpu_vm *vm, struct drm_exec *exec,
448 unsigned int num_fences);
449bool amdgpu_vm_ready(struct amdgpu_vm *vm);
450uint64_t amdgpu_vm_generation(struct amdgpu_device *adev, struct amdgpu_vm *vm);
451int amdgpu_vm_validate(struct amdgpu_device *adev, struct amdgpu_vm *vm,
452 struct ww_acquire_ctx *ticket,
453 int (*callback)(void *p, struct amdgpu_bo *bo),
454 void *param);
455int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job, bool need_pipe_sync);
456int amdgpu_vm_update_pdes(struct amdgpu_device *adev,
457 struct amdgpu_vm *vm, bool immediate);
458int amdgpu_vm_clear_freed(struct amdgpu_device *adev,
459 struct amdgpu_vm *vm,
460 struct dma_fence **fence);
461int amdgpu_vm_handle_moved(struct amdgpu_device *adev,
462 struct amdgpu_vm *vm,
463 struct ww_acquire_ctx *ticket);
464int amdgpu_vm_flush_compute_tlb(struct amdgpu_device *adev,
465 struct amdgpu_vm *vm,
466 uint32_t flush_type,
467 uint32_t xcc_mask);
468void amdgpu_vm_bo_base_init(struct amdgpu_vm_bo_base *base,
469 struct amdgpu_vm *vm, struct amdgpu_bo *bo);
470int amdgpu_vm_update_range(struct amdgpu_device *adev, struct amdgpu_vm *vm,
471 bool immediate, bool unlocked, bool flush_tlb, bool allow_override,
472 struct dma_resv *resv, uint64_t start, uint64_t last,
473 uint64_t flags, uint64_t offset, uint64_t vram_base,
474 struct ttm_resource *res, dma_addr_t *pages_addr,
475 struct dma_fence **fence);
476int amdgpu_vm_bo_update(struct amdgpu_device *adev,
477 struct amdgpu_bo_va *bo_va,
478 bool clear);
479bool amdgpu_vm_evictable(struct amdgpu_bo *bo);
480void amdgpu_vm_bo_invalidate(struct amdgpu_device *adev,
481 struct amdgpu_bo *bo, bool evicted);
482uint64_t amdgpu_vm_map_gart(const dma_addr_t *pages_addr, uint64_t addr);
483struct amdgpu_bo_va *amdgpu_vm_bo_find(struct amdgpu_vm *vm,
484 struct amdgpu_bo *bo);
485struct amdgpu_bo_va *amdgpu_vm_bo_add(struct amdgpu_device *adev,
486 struct amdgpu_vm *vm,
487 struct amdgpu_bo *bo);
488int amdgpu_vm_bo_map(struct amdgpu_device *adev,
489 struct amdgpu_bo_va *bo_va,
490 uint64_t addr, uint64_t offset,
491 uint64_t size, uint64_t flags);
492int amdgpu_vm_bo_replace_map(struct amdgpu_device *adev,
493 struct amdgpu_bo_va *bo_va,
494 uint64_t addr, uint64_t offset,
495 uint64_t size, uint64_t flags);
496int amdgpu_vm_bo_unmap(struct amdgpu_device *adev,
497 struct amdgpu_bo_va *bo_va,
498 uint64_t addr);
499int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev,
500 struct amdgpu_vm *vm,
501 uint64_t saddr, uint64_t size);
502struct amdgpu_bo_va_mapping *amdgpu_vm_bo_lookup_mapping(struct amdgpu_vm *vm,
503 uint64_t addr);
504void amdgpu_vm_bo_trace_cs(struct amdgpu_vm *vm, struct ww_acquire_ctx *ticket);
505void amdgpu_vm_bo_del(struct amdgpu_device *adev,
506 struct amdgpu_bo_va *bo_va);
507void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t min_vm_size,
508 uint32_t fragment_size_default, unsigned max_level,
509 unsigned max_bits);
510int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp);
511bool amdgpu_vm_need_pipeline_sync(struct amdgpu_ring *ring,
512 struct amdgpu_job *job);
513void amdgpu_vm_check_compute_bug(struct amdgpu_device *adev);
514
515struct amdgpu_task_info *
516amdgpu_vm_get_task_info_pasid(struct amdgpu_device *adev, u32 pasid);
517
518struct amdgpu_task_info *
519amdgpu_vm_get_task_info_vm(struct amdgpu_vm *vm);
520
521void amdgpu_vm_put_task_info(struct amdgpu_task_info *task_info);
522
523bool amdgpu_vm_handle_fault(struct amdgpu_device *adev, u32 pasid,
524 u32 vmid, u32 node_id, uint64_t addr,
525 bool write_fault);
526
527void amdgpu_vm_set_task_info(struct amdgpu_vm *vm);
528
529void amdgpu_vm_move_to_lru_tail(struct amdgpu_device *adev,
530 struct amdgpu_vm *vm);
531void amdgpu_vm_get_memory(struct amdgpu_vm *vm,
532 struct amdgpu_mem_stats *stats);
533
534int amdgpu_vm_pt_clear(struct amdgpu_device *adev, struct amdgpu_vm *vm,
535 struct amdgpu_bo_vm *vmbo, bool immediate);
536int amdgpu_vm_pt_create(struct amdgpu_device *adev, struct amdgpu_vm *vm,
537 int level, bool immediate, struct amdgpu_bo_vm **vmbo,
538 int32_t xcp_id);
539void amdgpu_vm_pt_free_root(struct amdgpu_device *adev, struct amdgpu_vm *vm);
540
541int amdgpu_vm_pde_update(struct amdgpu_vm_update_params *params,
542 struct amdgpu_vm_bo_base *entry);
543int amdgpu_vm_ptes_update(struct amdgpu_vm_update_params *params,
544 uint64_t start, uint64_t end,
545 uint64_t dst, uint64_t flags);
546void amdgpu_vm_pt_free_work(struct work_struct *work);
547
548#if defined(CONFIG_DEBUG_FS)
549void amdgpu_debugfs_vm_bo_info(struct amdgpu_vm *vm, struct seq_file *m);
550#endif
551
552int amdgpu_vm_pt_map_tables(struct amdgpu_device *adev, struct amdgpu_vm *vm);
553
554/**
555 * amdgpu_vm_tlb_seq - return tlb flush sequence number
556 * @vm: the amdgpu_vm structure to query
557 *
558 * Returns the tlb flush sequence number which indicates that the VM TLBs needs
559 * to be invalidated whenever the sequence number change.
560 */
561static inline uint64_t amdgpu_vm_tlb_seq(struct amdgpu_vm *vm)
562{
563 unsigned long flags;
564 spinlock_t *lock;
565
566 /*
567 * Workaround to stop racing between the fence signaling and handling
568 * the cb. The lock is static after initially setting it up, just make
569 * sure that the dma_fence structure isn't freed up.
570 */
571 rcu_read_lock();
572 lock = vm->last_tlb_flush->lock;
573 rcu_read_unlock();
574
575 spin_lock_irqsave(lock, flags);
576 spin_unlock_irqrestore(lock, flags);
577
578 return atomic64_read(&vm->tlb_seq);
579}
580
581/*
582 * vm eviction_lock can be taken in MMU notifiers. Make sure no reclaim-FS
583 * happens while holding this lock anywhere to prevent deadlocks when
584 * an MMU notifier runs in reclaim-FS context.
585 */
586static inline void amdgpu_vm_eviction_lock(struct amdgpu_vm *vm)
587{
588 mutex_lock(&vm->eviction_lock);
589 vm->saved_flags = memalloc_noreclaim_save();
590}
591
592static inline bool amdgpu_vm_eviction_trylock(struct amdgpu_vm *vm)
593{
594 if (mutex_trylock(&vm->eviction_lock)) {
595 vm->saved_flags = memalloc_noreclaim_save();
596 return true;
597 }
598 return false;
599}
600
601static inline void amdgpu_vm_eviction_unlock(struct amdgpu_vm *vm)
602{
603 memalloc_noreclaim_restore(vm->saved_flags);
604 mutex_unlock(&vm->eviction_lock);
605}
606
607void amdgpu_vm_update_fault_cache(struct amdgpu_device *adev,
608 unsigned int pasid,
609 uint64_t addr,
610 uint32_t status,
611 unsigned int vmhub);
612
613#endif
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_driver.h>
33#include <linux/sched/mm.h>
34
35#include "amdgpu_sync.h"
36#include "amdgpu_ring.h"
37#include "amdgpu_ids.h"
38
39struct amdgpu_bo_va;
40struct amdgpu_job;
41struct amdgpu_bo_list_entry;
42
43/*
44 * GPUVM handling
45 */
46
47/* Maximum number of PTEs the hardware can write with one command */
48#define AMDGPU_VM_MAX_UPDATE_SIZE 0x3FFFF
49
50/* number of entries in page table */
51#define AMDGPU_VM_PTE_COUNT(adev) (1 << (adev)->vm_manager.block_size)
52
53#define AMDGPU_PTE_VALID (1ULL << 0)
54#define AMDGPU_PTE_SYSTEM (1ULL << 1)
55#define AMDGPU_PTE_SNOOPED (1ULL << 2)
56
57/* RV+ */
58#define AMDGPU_PTE_TMZ (1ULL << 3)
59
60/* VI only */
61#define AMDGPU_PTE_EXECUTABLE (1ULL << 4)
62
63#define AMDGPU_PTE_READABLE (1ULL << 5)
64#define AMDGPU_PTE_WRITEABLE (1ULL << 6)
65
66#define AMDGPU_PTE_FRAG(x) ((x & 0x1fULL) << 7)
67
68/* TILED for VEGA10, reserved for older ASICs */
69#define AMDGPU_PTE_PRT (1ULL << 51)
70
71/* PDE is handled as PTE for VEGA10 */
72#define AMDGPU_PDE_PTE (1ULL << 54)
73
74#define AMDGPU_PTE_LOG (1ULL << 55)
75
76/* PTE is handled as PDE for VEGA10 (Translate Further) */
77#define AMDGPU_PTE_TF (1ULL << 56)
78
79/* PDE Block Fragment Size for VEGA10 */
80#define AMDGPU_PDE_BFS(a) ((uint64_t)a << 59)
81
82
83/* For GFX9 */
84#define AMDGPU_PTE_MTYPE_VG10(a) ((uint64_t)(a) << 57)
85#define AMDGPU_PTE_MTYPE_VG10_MASK AMDGPU_PTE_MTYPE_VG10(3ULL)
86
87#define AMDGPU_MTYPE_NC 0
88#define AMDGPU_MTYPE_CC 2
89
90#define AMDGPU_PTE_DEFAULT_ATC (AMDGPU_PTE_SYSTEM \
91 | AMDGPU_PTE_SNOOPED \
92 | AMDGPU_PTE_EXECUTABLE \
93 | AMDGPU_PTE_READABLE \
94 | AMDGPU_PTE_WRITEABLE \
95 | AMDGPU_PTE_MTYPE_VG10(AMDGPU_MTYPE_CC))
96
97/* gfx10 */
98#define AMDGPU_PTE_MTYPE_NV10(a) ((uint64_t)(a) << 48)
99#define AMDGPU_PTE_MTYPE_NV10_MASK AMDGPU_PTE_MTYPE_NV10(7ULL)
100
101/* How to programm VM fault handling */
102#define AMDGPU_VM_FAULT_STOP_NEVER 0
103#define AMDGPU_VM_FAULT_STOP_FIRST 1
104#define AMDGPU_VM_FAULT_STOP_ALWAYS 2
105
106/* Reserve 4MB VRAM for page tables */
107#define AMDGPU_VM_RESERVED_VRAM (4ULL << 20)
108
109/* max number of VMHUB */
110#define AMDGPU_MAX_VMHUBS 3
111#define AMDGPU_GFXHUB_0 0
112#define AMDGPU_MMHUB_0 1
113#define AMDGPU_MMHUB_1 2
114
115/* hardcode that limit for now */
116#define AMDGPU_VA_RESERVED_SIZE (1ULL << 20)
117
118/* max vmids dedicated for process */
119#define AMDGPU_VM_MAX_RESERVED_VMID 1
120
121#define AMDGPU_VM_CONTEXT_GFX 0
122#define AMDGPU_VM_CONTEXT_COMPUTE 1
123
124/* See vm_update_mode */
125#define AMDGPU_VM_USE_CPU_FOR_GFX (1 << 0)
126#define AMDGPU_VM_USE_CPU_FOR_COMPUTE (1 << 1)
127
128/* VMPT level enumerate, and the hiberachy is:
129 * PDB2->PDB1->PDB0->PTB
130 */
131enum amdgpu_vm_level {
132 AMDGPU_VM_PDB2,
133 AMDGPU_VM_PDB1,
134 AMDGPU_VM_PDB0,
135 AMDGPU_VM_PTB
136};
137
138/* base structure for tracking BO usage in a VM */
139struct amdgpu_vm_bo_base {
140 /* constant after initialization */
141 struct amdgpu_vm *vm;
142 struct amdgpu_bo *bo;
143
144 /* protected by bo being reserved */
145 struct amdgpu_vm_bo_base *next;
146
147 /* protected by spinlock */
148 struct list_head vm_status;
149
150 /* protected by the BO being reserved */
151 bool moved;
152};
153
154struct amdgpu_vm_pt {
155 struct amdgpu_vm_bo_base base;
156
157 /* array of page tables, one for each directory entry */
158 struct amdgpu_vm_pt *entries;
159};
160
161/* provided by hw blocks that can write ptes, e.g., sdma */
162struct amdgpu_vm_pte_funcs {
163 /* number of dw to reserve per operation */
164 unsigned copy_pte_num_dw;
165
166 /* copy pte entries from GART */
167 void (*copy_pte)(struct amdgpu_ib *ib,
168 uint64_t pe, uint64_t src,
169 unsigned count);
170
171 /* write pte one entry at a time with addr mapping */
172 void (*write_pte)(struct amdgpu_ib *ib, uint64_t pe,
173 uint64_t value, unsigned count,
174 uint32_t incr);
175 /* for linear pte/pde updates without addr mapping */
176 void (*set_pte_pde)(struct amdgpu_ib *ib,
177 uint64_t pe,
178 uint64_t addr, unsigned count,
179 uint32_t incr, uint64_t flags);
180};
181
182struct amdgpu_task_info {
183 char process_name[TASK_COMM_LEN];
184 char task_name[TASK_COMM_LEN];
185 pid_t pid;
186 pid_t tgid;
187};
188
189/**
190 * struct amdgpu_vm_update_params
191 *
192 * Encapsulate some VM table update parameters to reduce
193 * the number of function parameters
194 *
195 */
196struct amdgpu_vm_update_params {
197
198 /**
199 * @adev: amdgpu device we do this update for
200 */
201 struct amdgpu_device *adev;
202
203 /**
204 * @vm: optional amdgpu_vm we do this update for
205 */
206 struct amdgpu_vm *vm;
207
208 /**
209 * @immediate: if changes should be made immediately
210 */
211 bool immediate;
212
213 /**
214 * @unlocked: true if the root BO is not locked
215 */
216 bool unlocked;
217
218 /**
219 * @pages_addr:
220 *
221 * DMA addresses to use for mapping
222 */
223 dma_addr_t *pages_addr;
224
225 /**
226 * @job: job to used for hw submission
227 */
228 struct amdgpu_job *job;
229
230 /**
231 * @num_dw_left: number of dw left for the IB
232 */
233 unsigned int num_dw_left;
234};
235
236struct amdgpu_vm_update_funcs {
237 int (*map_table)(struct amdgpu_bo *bo);
238 int (*prepare)(struct amdgpu_vm_update_params *p, struct dma_resv *resv,
239 enum amdgpu_sync_mode sync_mode);
240 int (*update)(struct amdgpu_vm_update_params *p,
241 struct amdgpu_bo *bo, uint64_t pe, uint64_t addr,
242 unsigned count, uint32_t incr, uint64_t flags);
243 int (*commit)(struct amdgpu_vm_update_params *p,
244 struct dma_fence **fence);
245};
246
247struct amdgpu_vm {
248 /* tree of virtual addresses mapped */
249 struct rb_root_cached va;
250
251 /* Lock to prevent eviction while we are updating page tables
252 * use vm_eviction_lock/unlock(vm)
253 */
254 struct mutex eviction_lock;
255 bool evicting;
256 unsigned int saved_flags;
257
258 /* BOs who needs a validation */
259 struct list_head evicted;
260
261 /* PT BOs which relocated and their parent need an update */
262 struct list_head relocated;
263
264 /* per VM BOs moved, but not yet updated in the PT */
265 struct list_head moved;
266
267 /* All BOs of this VM not currently in the state machine */
268 struct list_head idle;
269
270 /* regular invalidated BOs, but not yet updated in the PT */
271 struct list_head invalidated;
272 spinlock_t invalidated_lock;
273
274 /* BO mappings freed, but not yet updated in the PT */
275 struct list_head freed;
276
277 /* contains the page directory */
278 struct amdgpu_vm_pt root;
279 struct dma_fence *last_update;
280
281 /* Scheduler entities for page table updates */
282 struct drm_sched_entity immediate;
283 struct drm_sched_entity delayed;
284
285 /* Last unlocked submission to the scheduler entities */
286 struct dma_fence *last_unlocked;
287
288 unsigned int pasid;
289 /* dedicated to vm */
290 struct amdgpu_vmid *reserved_vmid[AMDGPU_MAX_VMHUBS];
291
292 /* Flag to indicate if VM tables are updated by CPU or GPU (SDMA) */
293 bool use_cpu_for_update;
294
295 /* Functions to use for VM table updates */
296 const struct amdgpu_vm_update_funcs *update_funcs;
297
298 /* Flag to indicate ATS support from PTE for GFX9 */
299 bool pte_support_ats;
300
301 /* Up to 128 pending retry page faults */
302 DECLARE_KFIFO(faults, u64, 128);
303
304 /* Points to the KFD process VM info */
305 struct amdkfd_process_info *process_info;
306
307 /* List node in amdkfd_process_info.vm_list_head */
308 struct list_head vm_list_node;
309
310 /* Valid while the PD is reserved or fenced */
311 uint64_t pd_phys_addr;
312
313 /* Some basic info about the task */
314 struct amdgpu_task_info task_info;
315
316 /* Store positions of group of BOs */
317 struct ttm_lru_bulk_move lru_bulk_move;
318 /* mark whether can do the bulk move */
319 bool bulk_moveable;
320 /* Flag to indicate if VM is used for compute */
321 bool is_compute_context;
322};
323
324struct amdgpu_vm_manager {
325 /* Handling of VMIDs */
326 struct amdgpu_vmid_mgr id_mgr[AMDGPU_MAX_VMHUBS];
327 unsigned int first_kfd_vmid;
328
329 /* Handling of VM fences */
330 u64 fence_context;
331 unsigned seqno[AMDGPU_MAX_RINGS];
332
333 uint64_t max_pfn;
334 uint32_t num_level;
335 uint32_t block_size;
336 uint32_t fragment_size;
337 enum amdgpu_vm_level root_level;
338 /* vram base address for page table entry */
339 u64 vram_base_offset;
340 /* vm pte handling */
341 const struct amdgpu_vm_pte_funcs *vm_pte_funcs;
342 struct drm_gpu_scheduler *vm_pte_scheds[AMDGPU_MAX_RINGS];
343 unsigned vm_pte_num_scheds;
344 struct amdgpu_ring *page_fault;
345
346 /* partial resident texture handling */
347 spinlock_t prt_lock;
348 atomic_t num_prt_users;
349
350 /* controls how VM page tables are updated for Graphics and Compute.
351 * BIT0[= 0] Graphics updated by SDMA [= 1] by CPU
352 * BIT1[= 0] Compute updated by SDMA [= 1] by CPU
353 */
354 int vm_update_mode;
355
356 /* PASID to VM mapping, will be used in interrupt context to
357 * look up VM of a page fault
358 */
359 struct idr pasid_idr;
360 spinlock_t pasid_lock;
361};
362
363#define amdgpu_vm_copy_pte(adev, ib, pe, src, count) ((adev)->vm_manager.vm_pte_funcs->copy_pte((ib), (pe), (src), (count)))
364#define amdgpu_vm_write_pte(adev, ib, pe, value, count, incr) ((adev)->vm_manager.vm_pte_funcs->write_pte((ib), (pe), (value), (count), (incr)))
365#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)))
366
367extern const struct amdgpu_vm_update_funcs amdgpu_vm_cpu_funcs;
368extern const struct amdgpu_vm_update_funcs amdgpu_vm_sdma_funcs;
369
370void amdgpu_vm_manager_init(struct amdgpu_device *adev);
371void amdgpu_vm_manager_fini(struct amdgpu_device *adev);
372
373long amdgpu_vm_wait_idle(struct amdgpu_vm *vm, long timeout);
374int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
375 int vm_context, unsigned int pasid);
376int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm, unsigned int pasid);
377void amdgpu_vm_release_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm);
378void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm);
379void amdgpu_vm_get_pd_bo(struct amdgpu_vm *vm,
380 struct list_head *validated,
381 struct amdgpu_bo_list_entry *entry);
382bool amdgpu_vm_ready(struct amdgpu_vm *vm);
383int amdgpu_vm_validate_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm,
384 int (*callback)(void *p, struct amdgpu_bo *bo),
385 void *param);
386int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job, bool need_pipe_sync);
387int amdgpu_vm_update_pdes(struct amdgpu_device *adev,
388 struct amdgpu_vm *vm, bool immediate);
389int amdgpu_vm_clear_freed(struct amdgpu_device *adev,
390 struct amdgpu_vm *vm,
391 struct dma_fence **fence);
392int amdgpu_vm_handle_moved(struct amdgpu_device *adev,
393 struct amdgpu_vm *vm);
394int amdgpu_vm_bo_update(struct amdgpu_device *adev,
395 struct amdgpu_bo_va *bo_va,
396 bool clear);
397bool amdgpu_vm_evictable(struct amdgpu_bo *bo);
398void amdgpu_vm_bo_invalidate(struct amdgpu_device *adev,
399 struct amdgpu_bo *bo, bool evicted);
400uint64_t amdgpu_vm_map_gart(const dma_addr_t *pages_addr, uint64_t addr);
401struct amdgpu_bo_va *amdgpu_vm_bo_find(struct amdgpu_vm *vm,
402 struct amdgpu_bo *bo);
403struct amdgpu_bo_va *amdgpu_vm_bo_add(struct amdgpu_device *adev,
404 struct amdgpu_vm *vm,
405 struct amdgpu_bo *bo);
406int amdgpu_vm_bo_map(struct amdgpu_device *adev,
407 struct amdgpu_bo_va *bo_va,
408 uint64_t addr, uint64_t offset,
409 uint64_t size, uint64_t flags);
410int amdgpu_vm_bo_replace_map(struct amdgpu_device *adev,
411 struct amdgpu_bo_va *bo_va,
412 uint64_t addr, uint64_t offset,
413 uint64_t size, uint64_t flags);
414int amdgpu_vm_bo_unmap(struct amdgpu_device *adev,
415 struct amdgpu_bo_va *bo_va,
416 uint64_t addr);
417int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev,
418 struct amdgpu_vm *vm,
419 uint64_t saddr, uint64_t size);
420struct amdgpu_bo_va_mapping *amdgpu_vm_bo_lookup_mapping(struct amdgpu_vm *vm,
421 uint64_t addr);
422void amdgpu_vm_bo_trace_cs(struct amdgpu_vm *vm, struct ww_acquire_ctx *ticket);
423void amdgpu_vm_bo_rmv(struct amdgpu_device *adev,
424 struct amdgpu_bo_va *bo_va);
425void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t min_vm_size,
426 uint32_t fragment_size_default, unsigned max_level,
427 unsigned max_bits);
428int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp);
429bool amdgpu_vm_need_pipeline_sync(struct amdgpu_ring *ring,
430 struct amdgpu_job *job);
431void amdgpu_vm_check_compute_bug(struct amdgpu_device *adev);
432
433void amdgpu_vm_get_task_info(struct amdgpu_device *adev, unsigned int pasid,
434 struct amdgpu_task_info *task_info);
435bool amdgpu_vm_handle_fault(struct amdgpu_device *adev, unsigned int pasid,
436 uint64_t addr);
437
438void amdgpu_vm_set_task_info(struct amdgpu_vm *vm);
439
440void amdgpu_vm_move_to_lru_tail(struct amdgpu_device *adev,
441 struct amdgpu_vm *vm);
442void amdgpu_vm_del_from_lru_notify(struct ttm_buffer_object *bo);
443
444#endif