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 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 /* max vmids dedicated for process */ 123 #define AMDGPU_VM_MAX_RESERVED_VMID 1 124 125 /* See vm_update_mode */ 126 #define AMDGPU_VM_USE_CPU_FOR_GFX (1 << 0) 127 #define AMDGPU_VM_USE_CPU_FOR_COMPUTE (1 << 1) 128 129 /* VMPT level enumerate, and the hiberachy is: 130 * PDB2->PDB1->PDB0->PTB 131 */ 132 enum amdgpu_vm_level { 133 AMDGPU_VM_PDB2, 134 AMDGPU_VM_PDB1, 135 AMDGPU_VM_PDB0, 136 AMDGPU_VM_PTB 137 }; 138 139 /* base structure for tracking BO usage in a VM */ 140 struct amdgpu_vm_bo_base { 141 /* constant after initialization */ 142 struct amdgpu_vm *vm; 143 struct amdgpu_bo *bo; 144 145 /* protected by bo being reserved */ 146 struct amdgpu_vm_bo_base *next; 147 148 /* protected by spinlock */ 149 struct list_head vm_status; 150 151 /* protected by the BO being reserved */ 152 bool moved; 153 }; 154 155 /* provided by hw blocks that can write ptes, e.g., sdma */ 156 struct amdgpu_vm_pte_funcs { 157 /* number of dw to reserve per operation */ 158 unsigned copy_pte_num_dw; 159 160 /* copy pte entries from GART */ 161 void (*copy_pte)(struct amdgpu_ib *ib, 162 uint64_t pe, uint64_t src, 163 unsigned count); 164 165 /* write pte one entry at a time with addr mapping */ 166 void (*write_pte)(struct amdgpu_ib *ib, uint64_t pe, 167 uint64_t value, unsigned count, 168 uint32_t incr); 169 /* for linear pte/pde updates without addr mapping */ 170 void (*set_pte_pde)(struct amdgpu_ib *ib, 171 uint64_t pe, 172 uint64_t addr, unsigned count, 173 uint32_t incr, uint64_t flags); 174 }; 175 176 struct amdgpu_task_info { 177 char process_name[TASK_COMM_LEN]; 178 char task_name[TASK_COMM_LEN]; 179 pid_t pid; 180 pid_t tgid; 181 }; 182 183 /** 184 * struct amdgpu_vm_update_params 185 * 186 * Encapsulate some VM table update parameters to reduce 187 * the number of function parameters 188 * 189 */ 190 struct amdgpu_vm_update_params { 191 192 /** 193 * @adev: amdgpu device we do this update for 194 */ 195 struct amdgpu_device *adev; 196 197 /** 198 * @vm: optional amdgpu_vm we do this update for 199 */ 200 struct amdgpu_vm *vm; 201 202 /** 203 * @immediate: if changes should be made immediately 204 */ 205 bool immediate; 206 207 /** 208 * @unlocked: true if the root BO is not locked 209 */ 210 bool unlocked; 211 212 /** 213 * @pages_addr: 214 * 215 * DMA addresses to use for mapping 216 */ 217 dma_addr_t *pages_addr; 218 219 /** 220 * @job: job to used for hw submission 221 */ 222 struct amdgpu_job *job; 223 224 /** 225 * @num_dw_left: number of dw left for the IB 226 */ 227 unsigned int num_dw_left; 228 229 /** 230 * @table_freed: return true if page table is freed when updating 231 */ 232 bool table_freed; 233 }; 234 235 struct amdgpu_vm_update_funcs { 236 int (*map_table)(struct amdgpu_bo_vm *bo); 237 int (*prepare)(struct amdgpu_vm_update_params *p, struct dma_resv *resv, 238 enum amdgpu_sync_mode sync_mode); 239 int (*update)(struct amdgpu_vm_update_params *p, 240 struct amdgpu_bo_vm *bo, uint64_t pe, uint64_t addr, 241 unsigned count, uint32_t incr, uint64_t flags); 242 int (*commit)(struct amdgpu_vm_update_params *p, 243 struct dma_fence **fence); 244 }; 245 246 struct amdgpu_vm { 247 /* tree of virtual addresses mapped */ 248 struct rb_root_cached va; 249 250 /* Lock to prevent eviction while we are updating page tables 251 * use vm_eviction_lock/unlock(vm) 252 */ 253 struct mutex eviction_lock; 254 bool evicting; 255 unsigned int saved_flags; 256 257 /* Lock to protect vm_bo add/del/move on all lists of vm */ 258 spinlock_t status_lock; 259 260 /* BOs who needs a validation */ 261 struct list_head evicted; 262 263 /* PT BOs which relocated and their parent need an update */ 264 struct list_head relocated; 265 266 /* per VM BOs moved, but not yet updated in the PT */ 267 struct list_head moved; 268 269 /* All BOs of this VM not currently in the state machine */ 270 struct list_head idle; 271 272 /* regular invalidated BOs, but not yet updated in the PT */ 273 struct list_head invalidated; 274 275 /* BO mappings freed, but not yet updated in the PT */ 276 struct list_head freed; 277 278 /* BOs which are invalidated, has been updated in the PTs */ 279 struct list_head done; 280 281 /* PT BOs scheduled to free and fill with zero if vm_resv is not hold */ 282 struct list_head pt_freed; 283 struct work_struct pt_free_work; 284 285 /* contains the page directory */ 286 struct amdgpu_vm_bo_base root; 287 struct dma_fence *last_update; 288 289 /* Scheduler entities for page table updates */ 290 struct drm_sched_entity immediate; 291 struct drm_sched_entity delayed; 292 293 /* Last finished delayed update */ 294 atomic64_t tlb_seq; 295 struct dma_fence *last_tlb_flush; 296 297 /* Last unlocked submission to the scheduler entities */ 298 struct dma_fence *last_unlocked; 299 300 unsigned int pasid; 301 /* dedicated to vm */ 302 struct amdgpu_vmid *reserved_vmid[AMDGPU_MAX_VMHUBS]; 303 304 /* Flag to indicate if VM tables are updated by CPU or GPU (SDMA) */ 305 bool use_cpu_for_update; 306 307 /* Functions to use for VM table updates */ 308 const struct amdgpu_vm_update_funcs *update_funcs; 309 310 /* Flag to indicate ATS support from PTE for GFX9 */ 311 bool pte_support_ats; 312 313 /* Up to 128 pending retry page faults */ 314 DECLARE_KFIFO(faults, u64, 128); 315 316 /* Points to the KFD process VM info */ 317 struct amdkfd_process_info *process_info; 318 319 /* List node in amdkfd_process_info.vm_list_head */ 320 struct list_head vm_list_node; 321 322 /* Valid while the PD is reserved or fenced */ 323 uint64_t pd_phys_addr; 324 325 /* Some basic info about the task */ 326 struct amdgpu_task_info task_info; 327 328 /* Store positions of group of BOs */ 329 struct ttm_lru_bulk_move lru_bulk_move; 330 /* Flag to indicate if VM is used for compute */ 331 bool is_compute_context; 332 }; 333 334 struct amdgpu_vm_manager { 335 /* Handling of VMIDs */ 336 struct amdgpu_vmid_mgr id_mgr[AMDGPU_MAX_VMHUBS]; 337 unsigned int first_kfd_vmid; 338 bool concurrent_flush; 339 340 /* Handling of VM fences */ 341 u64 fence_context; 342 unsigned seqno[AMDGPU_MAX_RINGS]; 343 344 uint64_t max_pfn; 345 uint32_t num_level; 346 uint32_t block_size; 347 uint32_t fragment_size; 348 enum amdgpu_vm_level root_level; 349 /* vram base address for page table entry */ 350 u64 vram_base_offset; 351 /* vm pte handling */ 352 const struct amdgpu_vm_pte_funcs *vm_pte_funcs; 353 struct drm_gpu_scheduler *vm_pte_scheds[AMDGPU_MAX_RINGS]; 354 unsigned vm_pte_num_scheds; 355 struct amdgpu_ring *page_fault; 356 357 /* partial resident texture handling */ 358 spinlock_t prt_lock; 359 atomic_t num_prt_users; 360 361 /* controls how VM page tables are updated for Graphics and Compute. 362 * BIT0[= 0] Graphics updated by SDMA [= 1] by CPU 363 * BIT1[= 0] Compute updated by SDMA [= 1] by CPU 364 */ 365 int vm_update_mode; 366 367 /* PASID to VM mapping, will be used in interrupt context to 368 * look up VM of a page fault 369 */ 370 struct xarray pasids; 371 }; 372 373 struct amdgpu_bo_va_mapping; 374 375 #define amdgpu_vm_copy_pte(adev, ib, pe, src, count) ((adev)->vm_manager.vm_pte_funcs->copy_pte((ib), (pe), (src), (count))) 376 #define amdgpu_vm_write_pte(adev, ib, pe, value, count, incr) ((adev)->vm_manager.vm_pte_funcs->write_pte((ib), (pe), (value), (count), (incr))) 377 #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))) 378 379 extern const struct amdgpu_vm_update_funcs amdgpu_vm_cpu_funcs; 380 extern const struct amdgpu_vm_update_funcs amdgpu_vm_sdma_funcs; 381 382 void amdgpu_vm_manager_init(struct amdgpu_device *adev); 383 void amdgpu_vm_manager_fini(struct amdgpu_device *adev); 384 385 int amdgpu_vm_set_pasid(struct amdgpu_device *adev, struct amdgpu_vm *vm, 386 u32 pasid); 387 388 long amdgpu_vm_wait_idle(struct amdgpu_vm *vm, long timeout); 389 int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm); 390 int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm); 391 void amdgpu_vm_release_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm); 392 void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm); 393 void amdgpu_vm_get_pd_bo(struct amdgpu_vm *vm, 394 struct list_head *validated, 395 struct amdgpu_bo_list_entry *entry); 396 bool amdgpu_vm_ready(struct amdgpu_vm *vm); 397 int amdgpu_vm_validate_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm, 398 int (*callback)(void *p, struct amdgpu_bo *bo), 399 void *param); 400 int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job, bool need_pipe_sync); 401 int amdgpu_vm_update_pdes(struct amdgpu_device *adev, 402 struct amdgpu_vm *vm, bool immediate); 403 int amdgpu_vm_clear_freed(struct amdgpu_device *adev, 404 struct amdgpu_vm *vm, 405 struct dma_fence **fence); 406 int amdgpu_vm_handle_moved(struct amdgpu_device *adev, 407 struct amdgpu_vm *vm); 408 void amdgpu_vm_bo_base_init(struct amdgpu_vm_bo_base *base, 409 struct amdgpu_vm *vm, struct amdgpu_bo *bo); 410 int amdgpu_vm_update_range(struct amdgpu_device *adev, struct amdgpu_vm *vm, 411 bool immediate, bool unlocked, bool flush_tlb, 412 struct dma_resv *resv, uint64_t start, uint64_t last, 413 uint64_t flags, uint64_t offset, uint64_t vram_base, 414 struct ttm_resource *res, dma_addr_t *pages_addr, 415 struct dma_fence **fence); 416 int amdgpu_vm_bo_update(struct amdgpu_device *adev, 417 struct amdgpu_bo_va *bo_va, 418 bool clear); 419 bool amdgpu_vm_evictable(struct amdgpu_bo *bo); 420 void amdgpu_vm_bo_invalidate(struct amdgpu_device *adev, 421 struct amdgpu_bo *bo, bool evicted); 422 uint64_t amdgpu_vm_map_gart(const dma_addr_t *pages_addr, uint64_t addr); 423 struct amdgpu_bo_va *amdgpu_vm_bo_find(struct amdgpu_vm *vm, 424 struct amdgpu_bo *bo); 425 struct amdgpu_bo_va *amdgpu_vm_bo_add(struct amdgpu_device *adev, 426 struct amdgpu_vm *vm, 427 struct amdgpu_bo *bo); 428 int amdgpu_vm_bo_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_replace_map(struct amdgpu_device *adev, 433 struct amdgpu_bo_va *bo_va, 434 uint64_t addr, uint64_t offset, 435 uint64_t size, uint64_t flags); 436 int amdgpu_vm_bo_unmap(struct amdgpu_device *adev, 437 struct amdgpu_bo_va *bo_va, 438 uint64_t addr); 439 int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev, 440 struct amdgpu_vm *vm, 441 uint64_t saddr, uint64_t size); 442 struct amdgpu_bo_va_mapping *amdgpu_vm_bo_lookup_mapping(struct amdgpu_vm *vm, 443 uint64_t addr); 444 void amdgpu_vm_bo_trace_cs(struct amdgpu_vm *vm, struct ww_acquire_ctx *ticket); 445 void amdgpu_vm_bo_del(struct amdgpu_device *adev, 446 struct amdgpu_bo_va *bo_va); 447 void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t min_vm_size, 448 uint32_t fragment_size_default, unsigned max_level, 449 unsigned max_bits); 450 int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp); 451 bool amdgpu_vm_need_pipeline_sync(struct amdgpu_ring *ring, 452 struct amdgpu_job *job); 453 void amdgpu_vm_check_compute_bug(struct amdgpu_device *adev); 454 455 void amdgpu_vm_get_task_info(struct amdgpu_device *adev, u32 pasid, 456 struct amdgpu_task_info *task_info); 457 bool amdgpu_vm_handle_fault(struct amdgpu_device *adev, u32 pasid, 458 uint64_t addr, bool write_fault); 459 460 void amdgpu_vm_set_task_info(struct amdgpu_vm *vm); 461 462 void amdgpu_vm_move_to_lru_tail(struct amdgpu_device *adev, 463 struct amdgpu_vm *vm); 464 void amdgpu_vm_get_memory(struct amdgpu_vm *vm, uint64_t *vram_mem, 465 uint64_t *gtt_mem, uint64_t *cpu_mem); 466 467 int amdgpu_vm_pt_clear(struct amdgpu_device *adev, struct amdgpu_vm *vm, 468 struct amdgpu_bo_vm *vmbo, bool immediate); 469 int amdgpu_vm_pt_create(struct amdgpu_device *adev, struct amdgpu_vm *vm, 470 int level, bool immediate, struct amdgpu_bo_vm **vmbo); 471 void amdgpu_vm_pt_free_root(struct amdgpu_device *adev, struct amdgpu_vm *vm); 472 bool amdgpu_vm_pt_is_root_clean(struct amdgpu_device *adev, 473 struct amdgpu_vm *vm); 474 475 int amdgpu_vm_pde_update(struct amdgpu_vm_update_params *params, 476 struct amdgpu_vm_bo_base *entry); 477 int amdgpu_vm_ptes_update(struct amdgpu_vm_update_params *params, 478 uint64_t start, uint64_t end, 479 uint64_t dst, uint64_t flags); 480 void amdgpu_vm_pt_free_work(struct work_struct *work); 481 482 #if defined(CONFIG_DEBUG_FS) 483 void amdgpu_debugfs_vm_bo_info(struct amdgpu_vm *vm, struct seq_file *m); 484 #endif 485 486 /** 487 * amdgpu_vm_tlb_seq - return tlb flush sequence number 488 * @vm: the amdgpu_vm structure to query 489 * 490 * Returns the tlb flush sequence number which indicates that the VM TLBs needs 491 * to be invalidated whenever the sequence number change. 492 */ 493 static inline uint64_t amdgpu_vm_tlb_seq(struct amdgpu_vm *vm) 494 { 495 unsigned long flags; 496 spinlock_t *lock; 497 498 /* 499 * Workaround to stop racing between the fence signaling and handling 500 * the cb. The lock is static after initially setting it up, just make 501 * sure that the dma_fence structure isn't freed up. 502 */ 503 rcu_read_lock(); 504 lock = vm->last_tlb_flush->lock; 505 rcu_read_unlock(); 506 507 spin_lock_irqsave(lock, flags); 508 spin_unlock_irqrestore(lock, flags); 509 510 return atomic64_read(&vm->tlb_seq); 511 } 512 513 /* 514 * vm eviction_lock can be taken in MMU notifiers. Make sure no reclaim-FS 515 * happens while holding this lock anywhere to prevent deadlocks when 516 * an MMU notifier runs in reclaim-FS context. 517 */ 518 static inline void amdgpu_vm_eviction_lock(struct amdgpu_vm *vm) 519 { 520 mutex_lock(&vm->eviction_lock); 521 vm->saved_flags = memalloc_noreclaim_save(); 522 } 523 524 static inline bool amdgpu_vm_eviction_trylock(struct amdgpu_vm *vm) 525 { 526 if (mutex_trylock(&vm->eviction_lock)) { 527 vm->saved_flags = memalloc_noreclaim_save(); 528 return true; 529 } 530 return false; 531 } 532 533 static inline void amdgpu_vm_eviction_unlock(struct amdgpu_vm *vm) 534 { 535 memalloc_noreclaim_restore(vm->saved_flags); 536 mutex_unlock(&vm->eviction_lock); 537 } 538 539 #endif 540