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 drm_exec; 40 41 struct amdgpu_bo_va; 42 struct amdgpu_job; 43 struct amdgpu_bo_list_entry; 44 struct amdgpu_bo_vm; 45 struct 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 /* Reserve 4MB VRAM 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 2MB at top/bottom of address space for kernel use */ 139 #define AMDGPU_VA_RESERVED_SIZE (2ULL << 20) 140 141 /* See vm_update_mode */ 142 #define AMDGPU_VM_USE_CPU_FOR_GFX (1 << 0) 143 #define AMDGPU_VM_USE_CPU_FOR_COMPUTE (1 << 1) 144 145 /* VMPT level enumerate, and the hiberachy is: 146 * PDB2->PDB1->PDB0->PTB 147 */ 148 enum amdgpu_vm_level { 149 AMDGPU_VM_PDB2, 150 AMDGPU_VM_PDB1, 151 AMDGPU_VM_PDB0, 152 AMDGPU_VM_PTB 153 }; 154 155 /* base structure for tracking BO usage in a VM */ 156 struct amdgpu_vm_bo_base { 157 /* constant after initialization */ 158 struct amdgpu_vm *vm; 159 struct amdgpu_bo *bo; 160 161 /* protected by bo being reserved */ 162 struct amdgpu_vm_bo_base *next; 163 164 /* protected by spinlock */ 165 struct list_head vm_status; 166 167 /* protected by the BO being reserved */ 168 bool moved; 169 }; 170 171 /* provided by hw blocks that can write ptes, e.g., sdma */ 172 struct amdgpu_vm_pte_funcs { 173 /* number of dw to reserve per operation */ 174 unsigned copy_pte_num_dw; 175 176 /* copy pte entries from GART */ 177 void (*copy_pte)(struct amdgpu_ib *ib, 178 uint64_t pe, uint64_t src, 179 unsigned count); 180 181 /* write pte one entry at a time with addr mapping */ 182 void (*write_pte)(struct amdgpu_ib *ib, uint64_t pe, 183 uint64_t value, unsigned count, 184 uint32_t incr); 185 /* for linear pte/pde updates without addr mapping */ 186 void (*set_pte_pde)(struct amdgpu_ib *ib, 187 uint64_t pe, 188 uint64_t addr, unsigned count, 189 uint32_t incr, uint64_t flags); 190 }; 191 192 struct amdgpu_task_info { 193 char process_name[TASK_COMM_LEN]; 194 char task_name[TASK_COMM_LEN]; 195 pid_t pid; 196 pid_t tgid; 197 }; 198 199 /** 200 * struct amdgpu_vm_update_params 201 * 202 * Encapsulate some VM table update parameters to reduce 203 * the number of function parameters 204 * 205 */ 206 struct amdgpu_vm_update_params { 207 208 /** 209 * @adev: amdgpu device we do this update for 210 */ 211 struct amdgpu_device *adev; 212 213 /** 214 * @vm: optional amdgpu_vm we do this update for 215 */ 216 struct amdgpu_vm *vm; 217 218 /** 219 * @immediate: if changes should be made immediately 220 */ 221 bool immediate; 222 223 /** 224 * @unlocked: true if the root BO is not locked 225 */ 226 bool unlocked; 227 228 /** 229 * @pages_addr: 230 * 231 * DMA addresses to use for mapping 232 */ 233 dma_addr_t *pages_addr; 234 235 /** 236 * @job: job to used for hw submission 237 */ 238 struct amdgpu_job *job; 239 240 /** 241 * @num_dw_left: number of dw left for the IB 242 */ 243 unsigned int num_dw_left; 244 245 /** 246 * @table_freed: return true if page table is freed when updating 247 */ 248 bool table_freed; 249 }; 250 251 struct amdgpu_vm_update_funcs { 252 int (*map_table)(struct amdgpu_bo_vm *bo); 253 int (*prepare)(struct amdgpu_vm_update_params *p, struct dma_resv *resv, 254 enum amdgpu_sync_mode sync_mode); 255 int (*update)(struct amdgpu_vm_update_params *p, 256 struct amdgpu_bo_vm *bo, uint64_t pe, uint64_t addr, 257 unsigned count, uint32_t incr, uint64_t flags); 258 int (*commit)(struct amdgpu_vm_update_params *p, 259 struct dma_fence **fence); 260 }; 261 262 struct amdgpu_vm_fault_info { 263 /* fault address */ 264 uint64_t addr; 265 /* fault status register */ 266 uint32_t status; 267 /* which vmhub? gfxhub, mmhub, etc. */ 268 unsigned int vmhub; 269 }; 270 271 struct amdgpu_vm { 272 /* tree of virtual addresses mapped */ 273 struct rb_root_cached va; 274 275 /* Lock to prevent eviction while we are updating page tables 276 * use vm_eviction_lock/unlock(vm) 277 */ 278 struct mutex eviction_lock; 279 bool evicting; 280 unsigned int saved_flags; 281 282 /* Lock to protect vm_bo add/del/move on all lists of vm */ 283 spinlock_t status_lock; 284 285 /* BOs who needs a validation */ 286 struct list_head evicted; 287 288 /* PT BOs which relocated and their parent need an update */ 289 struct list_head relocated; 290 291 /* per VM BOs moved, but not yet updated in the PT */ 292 struct list_head moved; 293 294 /* All BOs of this VM not currently in the state machine */ 295 struct list_head idle; 296 297 /* regular invalidated BOs, but not yet updated in the PT */ 298 struct list_head invalidated; 299 300 /* BO mappings freed, but not yet updated in the PT */ 301 struct list_head freed; 302 303 /* BOs which are invalidated, has been updated in the PTs */ 304 struct list_head done; 305 306 /* PT BOs scheduled to free and fill with zero if vm_resv is not hold */ 307 struct list_head pt_freed; 308 struct work_struct pt_free_work; 309 310 /* contains the page directory */ 311 struct amdgpu_vm_bo_base root; 312 struct dma_fence *last_update; 313 314 /* Scheduler entities for page table updates */ 315 struct drm_sched_entity immediate; 316 struct drm_sched_entity delayed; 317 318 /* Last finished delayed update */ 319 atomic64_t tlb_seq; 320 struct dma_fence *last_tlb_flush; 321 322 /* How many times we had to re-generate the page tables */ 323 uint64_t generation; 324 325 /* Last unlocked submission to the scheduler entities */ 326 struct dma_fence *last_unlocked; 327 328 unsigned int pasid; 329 bool reserved_vmid[AMDGPU_MAX_VMHUBS]; 330 331 /* Flag to indicate if VM tables are updated by CPU or GPU (SDMA) */ 332 bool use_cpu_for_update; 333 334 /* Functions to use for VM table updates */ 335 const struct amdgpu_vm_update_funcs *update_funcs; 336 337 /* Flag to indicate ATS support from PTE for GFX9 */ 338 bool pte_support_ats; 339 340 /* Up to 128 pending retry page faults */ 341 DECLARE_KFIFO(faults, u64, 128); 342 343 /* Points to the KFD process VM info */ 344 struct amdkfd_process_info *process_info; 345 346 /* List node in amdkfd_process_info.vm_list_head */ 347 struct list_head vm_list_node; 348 349 /* Valid while the PD is reserved or fenced */ 350 uint64_t pd_phys_addr; 351 352 /* Some basic info about the task */ 353 struct amdgpu_task_info task_info; 354 355 /* Store positions of group of BOs */ 356 struct ttm_lru_bulk_move lru_bulk_move; 357 /* Flag to indicate if VM is used for compute */ 358 bool is_compute_context; 359 360 /* Memory partition number, -1 means any partition */ 361 int8_t mem_id; 362 363 /* cached fault info */ 364 struct amdgpu_vm_fault_info fault_info; 365 }; 366 367 struct amdgpu_vm_manager { 368 /* Handling of VMIDs */ 369 struct amdgpu_vmid_mgr id_mgr[AMDGPU_MAX_VMHUBS]; 370 unsigned int first_kfd_vmid; 371 bool concurrent_flush; 372 373 /* Handling of VM fences */ 374 u64 fence_context; 375 unsigned seqno[AMDGPU_MAX_RINGS]; 376 377 uint64_t max_pfn; 378 uint32_t num_level; 379 uint32_t block_size; 380 uint32_t fragment_size; 381 enum amdgpu_vm_level root_level; 382 /* vram base address for page table entry */ 383 u64 vram_base_offset; 384 /* vm pte handling */ 385 const struct amdgpu_vm_pte_funcs *vm_pte_funcs; 386 struct drm_gpu_scheduler *vm_pte_scheds[AMDGPU_MAX_RINGS]; 387 unsigned vm_pte_num_scheds; 388 struct amdgpu_ring *page_fault; 389 390 /* partial resident texture handling */ 391 spinlock_t prt_lock; 392 atomic_t num_prt_users; 393 394 /* controls how VM page tables are updated for Graphics and Compute. 395 * BIT0[= 0] Graphics updated by SDMA [= 1] by CPU 396 * BIT1[= 0] Compute updated by SDMA [= 1] by CPU 397 */ 398 int vm_update_mode; 399 400 /* PASID to VM mapping, will be used in interrupt context to 401 * look up VM of a page fault 402 */ 403 struct xarray pasids; 404 }; 405 406 struct amdgpu_bo_va_mapping; 407 408 #define amdgpu_vm_copy_pte(adev, ib, pe, src, count) ((adev)->vm_manager.vm_pte_funcs->copy_pte((ib), (pe), (src), (count))) 409 #define amdgpu_vm_write_pte(adev, ib, pe, value, count, incr) ((adev)->vm_manager.vm_pte_funcs->write_pte((ib), (pe), (value), (count), (incr))) 410 #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))) 411 412 extern const struct amdgpu_vm_update_funcs amdgpu_vm_cpu_funcs; 413 extern const struct amdgpu_vm_update_funcs amdgpu_vm_sdma_funcs; 414 415 void amdgpu_vm_manager_init(struct amdgpu_device *adev); 416 void amdgpu_vm_manager_fini(struct amdgpu_device *adev); 417 418 int amdgpu_vm_set_pasid(struct amdgpu_device *adev, struct amdgpu_vm *vm, 419 u32 pasid); 420 421 long amdgpu_vm_wait_idle(struct amdgpu_vm *vm, long timeout); 422 int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm, int32_t xcp_id); 423 int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm); 424 void amdgpu_vm_release_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm); 425 void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm); 426 int amdgpu_vm_lock_pd(struct amdgpu_vm *vm, struct drm_exec *exec, 427 unsigned int num_fences); 428 bool amdgpu_vm_ready(struct amdgpu_vm *vm); 429 uint64_t amdgpu_vm_generation(struct amdgpu_device *adev, struct amdgpu_vm *vm); 430 int amdgpu_vm_validate_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm, 431 int (*callback)(void *p, struct amdgpu_bo *bo), 432 void *param); 433 int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job, bool need_pipe_sync); 434 int amdgpu_vm_update_pdes(struct amdgpu_device *adev, 435 struct amdgpu_vm *vm, bool immediate); 436 int amdgpu_vm_clear_freed(struct amdgpu_device *adev, 437 struct amdgpu_vm *vm, 438 struct dma_fence **fence); 439 int amdgpu_vm_handle_moved(struct amdgpu_device *adev, 440 struct amdgpu_vm *vm); 441 void amdgpu_vm_bo_base_init(struct amdgpu_vm_bo_base *base, 442 struct amdgpu_vm *vm, struct amdgpu_bo *bo); 443 int amdgpu_vm_update_range(struct amdgpu_device *adev, struct amdgpu_vm *vm, 444 bool immediate, bool unlocked, bool flush_tlb, 445 struct dma_resv *resv, uint64_t start, uint64_t last, 446 uint64_t flags, uint64_t offset, uint64_t vram_base, 447 struct ttm_resource *res, dma_addr_t *pages_addr, 448 struct dma_fence **fence); 449 int amdgpu_vm_bo_update(struct amdgpu_device *adev, 450 struct amdgpu_bo_va *bo_va, 451 bool clear); 452 bool amdgpu_vm_evictable(struct amdgpu_bo *bo); 453 void amdgpu_vm_bo_invalidate(struct amdgpu_device *adev, 454 struct amdgpu_bo *bo, bool evicted); 455 uint64_t amdgpu_vm_map_gart(const dma_addr_t *pages_addr, uint64_t addr); 456 struct amdgpu_bo_va *amdgpu_vm_bo_find(struct amdgpu_vm *vm, 457 struct amdgpu_bo *bo); 458 struct amdgpu_bo_va *amdgpu_vm_bo_add(struct amdgpu_device *adev, 459 struct amdgpu_vm *vm, 460 struct amdgpu_bo *bo); 461 int amdgpu_vm_bo_map(struct amdgpu_device *adev, 462 struct amdgpu_bo_va *bo_va, 463 uint64_t addr, uint64_t offset, 464 uint64_t size, uint64_t flags); 465 int amdgpu_vm_bo_replace_map(struct amdgpu_device *adev, 466 struct amdgpu_bo_va *bo_va, 467 uint64_t addr, uint64_t offset, 468 uint64_t size, uint64_t flags); 469 int amdgpu_vm_bo_unmap(struct amdgpu_device *adev, 470 struct amdgpu_bo_va *bo_va, 471 uint64_t addr); 472 int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev, 473 struct amdgpu_vm *vm, 474 uint64_t saddr, uint64_t size); 475 struct amdgpu_bo_va_mapping *amdgpu_vm_bo_lookup_mapping(struct amdgpu_vm *vm, 476 uint64_t addr); 477 void amdgpu_vm_bo_trace_cs(struct amdgpu_vm *vm, struct ww_acquire_ctx *ticket); 478 void amdgpu_vm_bo_del(struct amdgpu_device *adev, 479 struct amdgpu_bo_va *bo_va); 480 void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t min_vm_size, 481 uint32_t fragment_size_default, unsigned max_level, 482 unsigned max_bits); 483 int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp); 484 bool amdgpu_vm_need_pipeline_sync(struct amdgpu_ring *ring, 485 struct amdgpu_job *job); 486 void amdgpu_vm_check_compute_bug(struct amdgpu_device *adev); 487 488 void amdgpu_vm_get_task_info(struct amdgpu_device *adev, u32 pasid, 489 struct amdgpu_task_info *task_info); 490 bool amdgpu_vm_handle_fault(struct amdgpu_device *adev, u32 pasid, 491 u32 vmid, u32 node_id, uint64_t addr, 492 bool write_fault); 493 494 void amdgpu_vm_set_task_info(struct amdgpu_vm *vm); 495 496 void amdgpu_vm_move_to_lru_tail(struct amdgpu_device *adev, 497 struct amdgpu_vm *vm); 498 void amdgpu_vm_get_memory(struct amdgpu_vm *vm, 499 struct amdgpu_mem_stats *stats); 500 501 int amdgpu_vm_pt_clear(struct amdgpu_device *adev, struct amdgpu_vm *vm, 502 struct amdgpu_bo_vm *vmbo, bool immediate); 503 int amdgpu_vm_pt_create(struct amdgpu_device *adev, struct amdgpu_vm *vm, 504 int level, bool immediate, struct amdgpu_bo_vm **vmbo, 505 int32_t xcp_id); 506 void amdgpu_vm_pt_free_root(struct amdgpu_device *adev, struct amdgpu_vm *vm); 507 bool amdgpu_vm_pt_is_root_clean(struct amdgpu_device *adev, 508 struct amdgpu_vm *vm); 509 510 int amdgpu_vm_pde_update(struct amdgpu_vm_update_params *params, 511 struct amdgpu_vm_bo_base *entry); 512 int amdgpu_vm_ptes_update(struct amdgpu_vm_update_params *params, 513 uint64_t start, uint64_t end, 514 uint64_t dst, uint64_t flags); 515 void amdgpu_vm_pt_free_work(struct work_struct *work); 516 517 #if defined(CONFIG_DEBUG_FS) 518 void amdgpu_debugfs_vm_bo_info(struct amdgpu_vm *vm, struct seq_file *m); 519 #endif 520 521 int amdgpu_vm_pt_map_tables(struct amdgpu_device *adev, struct amdgpu_vm *vm); 522 523 /** 524 * amdgpu_vm_tlb_seq - return tlb flush sequence number 525 * @vm: the amdgpu_vm structure to query 526 * 527 * Returns the tlb flush sequence number which indicates that the VM TLBs needs 528 * to be invalidated whenever the sequence number change. 529 */ 530 static inline uint64_t amdgpu_vm_tlb_seq(struct amdgpu_vm *vm) 531 { 532 unsigned long flags; 533 spinlock_t *lock; 534 535 /* 536 * Workaround to stop racing between the fence signaling and handling 537 * the cb. The lock is static after initially setting it up, just make 538 * sure that the dma_fence structure isn't freed up. 539 */ 540 rcu_read_lock(); 541 lock = vm->last_tlb_flush->lock; 542 rcu_read_unlock(); 543 544 spin_lock_irqsave(lock, flags); 545 spin_unlock_irqrestore(lock, flags); 546 547 return atomic64_read(&vm->tlb_seq); 548 } 549 550 /* 551 * vm eviction_lock can be taken in MMU notifiers. Make sure no reclaim-FS 552 * happens while holding this lock anywhere to prevent deadlocks when 553 * an MMU notifier runs in reclaim-FS context. 554 */ 555 static inline void amdgpu_vm_eviction_lock(struct amdgpu_vm *vm) 556 { 557 mutex_lock(&vm->eviction_lock); 558 vm->saved_flags = memalloc_noreclaim_save(); 559 } 560 561 static inline bool amdgpu_vm_eviction_trylock(struct amdgpu_vm *vm) 562 { 563 if (mutex_trylock(&vm->eviction_lock)) { 564 vm->saved_flags = memalloc_noreclaim_save(); 565 return true; 566 } 567 return false; 568 } 569 570 static inline void amdgpu_vm_eviction_unlock(struct amdgpu_vm *vm) 571 { 572 memalloc_noreclaim_restore(vm->saved_flags); 573 mutex_unlock(&vm->eviction_lock); 574 } 575 576 void amdgpu_vm_update_fault_cache(struct amdgpu_device *adev, 577 unsigned int pasid, 578 uint64_t addr, 579 uint32_t status, 580 unsigned int vmhub); 581 582 #endif 583