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/chash.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 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 /* VI only */ 58 #define AMDGPU_PTE_EXECUTABLE (1ULL << 4) 59 60 #define AMDGPU_PTE_READABLE (1ULL << 5) 61 #define AMDGPU_PTE_WRITEABLE (1ULL << 6) 62 63 #define AMDGPU_PTE_FRAG(x) ((x & 0x1fULL) << 7) 64 65 /* TILED for VEGA10, reserved for older ASICs */ 66 #define AMDGPU_PTE_PRT (1ULL << 51) 67 68 /* PDE is handled as PTE for VEGA10 */ 69 #define AMDGPU_PDE_PTE (1ULL << 54) 70 71 /* PTE is handled as PDE for VEGA10 (Translate Further) */ 72 #define AMDGPU_PTE_TF (1ULL << 56) 73 74 /* PDE Block Fragment Size for VEGA10 */ 75 #define AMDGPU_PDE_BFS(a) ((uint64_t)a << 59) 76 77 78 /* For GFX9 */ 79 #define AMDGPU_PTE_MTYPE(a) ((uint64_t)a << 57) 80 #define AMDGPU_PTE_MTYPE_MASK AMDGPU_PTE_MTYPE(3ULL) 81 82 #define AMDGPU_MTYPE_NC 0 83 #define AMDGPU_MTYPE_CC 2 84 85 #define AMDGPU_PTE_DEFAULT_ATC (AMDGPU_PTE_SYSTEM \ 86 | AMDGPU_PTE_SNOOPED \ 87 | AMDGPU_PTE_EXECUTABLE \ 88 | AMDGPU_PTE_READABLE \ 89 | AMDGPU_PTE_WRITEABLE \ 90 | AMDGPU_PTE_MTYPE(AMDGPU_MTYPE_CC)) 91 92 /* How to programm VM fault handling */ 93 #define AMDGPU_VM_FAULT_STOP_NEVER 0 94 #define AMDGPU_VM_FAULT_STOP_FIRST 1 95 #define AMDGPU_VM_FAULT_STOP_ALWAYS 2 96 97 /* max number of VMHUB */ 98 #define AMDGPU_MAX_VMHUBS 2 99 #define AMDGPU_GFXHUB 0 100 #define AMDGPU_MMHUB 1 101 102 /* hardcode that limit for now */ 103 #define AMDGPU_VA_RESERVED_SIZE (1ULL << 20) 104 105 /* max vmids dedicated for process */ 106 #define AMDGPU_VM_MAX_RESERVED_VMID 1 107 108 #define AMDGPU_VM_CONTEXT_GFX 0 109 #define AMDGPU_VM_CONTEXT_COMPUTE 1 110 111 /* See vm_update_mode */ 112 #define AMDGPU_VM_USE_CPU_FOR_GFX (1 << 0) 113 #define AMDGPU_VM_USE_CPU_FOR_COMPUTE (1 << 1) 114 115 /* VMPT level enumerate, and the hiberachy is: 116 * PDB2->PDB1->PDB0->PTB 117 */ 118 enum amdgpu_vm_level { 119 AMDGPU_VM_PDB2, 120 AMDGPU_VM_PDB1, 121 AMDGPU_VM_PDB0, 122 AMDGPU_VM_PTB 123 }; 124 125 /* base structure for tracking BO usage in a VM */ 126 struct amdgpu_vm_bo_base { 127 /* constant after initialization */ 128 struct amdgpu_vm *vm; 129 struct amdgpu_bo *bo; 130 131 /* protected by bo being reserved */ 132 struct amdgpu_vm_bo_base *next; 133 134 /* protected by spinlock */ 135 struct list_head vm_status; 136 137 /* protected by the BO being reserved */ 138 bool moved; 139 }; 140 141 struct amdgpu_vm_pt { 142 struct amdgpu_vm_bo_base base; 143 bool huge; 144 145 /* array of page tables, one for each directory entry */ 146 struct amdgpu_vm_pt *entries; 147 }; 148 149 /* provided by hw blocks that can write ptes, e.g., sdma */ 150 struct amdgpu_vm_pte_funcs { 151 /* number of dw to reserve per operation */ 152 unsigned copy_pte_num_dw; 153 154 /* copy pte entries from GART */ 155 void (*copy_pte)(struct amdgpu_ib *ib, 156 uint64_t pe, uint64_t src, 157 unsigned count); 158 159 /* write pte one entry at a time with addr mapping */ 160 void (*write_pte)(struct amdgpu_ib *ib, uint64_t pe, 161 uint64_t value, unsigned count, 162 uint32_t incr); 163 /* for linear pte/pde updates without addr mapping */ 164 void (*set_pte_pde)(struct amdgpu_ib *ib, 165 uint64_t pe, 166 uint64_t addr, unsigned count, 167 uint32_t incr, uint64_t flags); 168 }; 169 170 #define AMDGPU_VM_FAULT(pasid, addr) (((u64)(pasid) << 48) | (addr)) 171 #define AMDGPU_VM_FAULT_PASID(fault) ((u64)(fault) >> 48) 172 #define AMDGPU_VM_FAULT_ADDR(fault) ((u64)(fault) & 0xfffffffff000ULL) 173 174 175 struct amdgpu_task_info { 176 char process_name[TASK_COMM_LEN]; 177 char task_name[TASK_COMM_LEN]; 178 pid_t pid; 179 pid_t tgid; 180 }; 181 182 #define AMDGPU_PAGEFAULT_HASH_BITS 8 183 struct amdgpu_retryfault_hashtable { 184 DECLARE_CHASH_TABLE(hash, AMDGPU_PAGEFAULT_HASH_BITS, 8, 0); 185 spinlock_t lock; 186 int count; 187 }; 188 189 struct amdgpu_vm { 190 /* tree of virtual addresses mapped */ 191 struct rb_root_cached va; 192 193 /* BOs who needs a validation */ 194 struct list_head evicted; 195 196 /* PT BOs which relocated and their parent need an update */ 197 struct list_head relocated; 198 199 /* per VM BOs moved, but not yet updated in the PT */ 200 struct list_head moved; 201 202 /* All BOs of this VM not currently in the state machine */ 203 struct list_head idle; 204 205 /* regular invalidated BOs, but not yet updated in the PT */ 206 struct list_head invalidated; 207 spinlock_t invalidated_lock; 208 209 /* BO mappings freed, but not yet updated in the PT */ 210 struct list_head freed; 211 212 /* contains the page directory */ 213 struct amdgpu_vm_pt root; 214 struct dma_fence *last_update; 215 216 /* Scheduler entity for page table updates */ 217 struct drm_sched_entity entity; 218 219 unsigned int pasid; 220 /* dedicated to vm */ 221 struct amdgpu_vmid *reserved_vmid[AMDGPU_MAX_VMHUBS]; 222 223 /* Flag to indicate if VM tables are updated by CPU or GPU (SDMA) */ 224 bool use_cpu_for_update; 225 226 /* Flag to indicate ATS support from PTE for GFX9 */ 227 bool pte_support_ats; 228 229 /* Up to 128 pending retry page faults */ 230 DECLARE_KFIFO(faults, u64, 128); 231 232 /* Points to the KFD process VM info */ 233 struct amdkfd_process_info *process_info; 234 235 /* List node in amdkfd_process_info.vm_list_head */ 236 struct list_head vm_list_node; 237 238 /* Valid while the PD is reserved or fenced */ 239 uint64_t pd_phys_addr; 240 241 /* Some basic info about the task */ 242 struct amdgpu_task_info task_info; 243 244 /* Store positions of group of BOs */ 245 struct ttm_lru_bulk_move lru_bulk_move; 246 /* mark whether can do the bulk move */ 247 bool bulk_moveable; 248 struct amdgpu_retryfault_hashtable *fault_hash; 249 }; 250 251 struct amdgpu_vm_manager { 252 /* Handling of VMIDs */ 253 struct amdgpu_vmid_mgr id_mgr[AMDGPU_MAX_VMHUBS]; 254 255 /* Handling of VM fences */ 256 u64 fence_context; 257 unsigned seqno[AMDGPU_MAX_RINGS]; 258 259 uint64_t max_pfn; 260 uint32_t num_level; 261 uint32_t block_size; 262 uint32_t fragment_size; 263 enum amdgpu_vm_level root_level; 264 /* vram base address for page table entry */ 265 u64 vram_base_offset; 266 /* vm pte handling */ 267 const struct amdgpu_vm_pte_funcs *vm_pte_funcs; 268 struct drm_sched_rq *vm_pte_rqs[AMDGPU_MAX_RINGS]; 269 unsigned vm_pte_num_rqs; 270 271 /* partial resident texture handling */ 272 spinlock_t prt_lock; 273 atomic_t num_prt_users; 274 275 /* controls how VM page tables are updated for Graphics and Compute. 276 * BIT0[= 0] Graphics updated by SDMA [= 1] by CPU 277 * BIT1[= 0] Compute updated by SDMA [= 1] by CPU 278 */ 279 int vm_update_mode; 280 281 /* PASID to VM mapping, will be used in interrupt context to 282 * look up VM of a page fault 283 */ 284 struct idr pasid_idr; 285 spinlock_t pasid_lock; 286 }; 287 288 #define amdgpu_vm_copy_pte(adev, ib, pe, src, count) ((adev)->vm_manager.vm_pte_funcs->copy_pte((ib), (pe), (src), (count))) 289 #define amdgpu_vm_write_pte(adev, ib, pe, value, count, incr) ((adev)->vm_manager.vm_pte_funcs->write_pte((ib), (pe), (value), (count), (incr))) 290 #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))) 291 292 void amdgpu_vm_manager_init(struct amdgpu_device *adev); 293 void amdgpu_vm_manager_fini(struct amdgpu_device *adev); 294 int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm, 295 int vm_context, unsigned int pasid); 296 int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm, unsigned int pasid); 297 void amdgpu_vm_release_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm); 298 void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm); 299 void amdgpu_vm_get_pd_bo(struct amdgpu_vm *vm, 300 struct list_head *validated, 301 struct amdgpu_bo_list_entry *entry); 302 bool amdgpu_vm_ready(struct amdgpu_vm *vm); 303 int amdgpu_vm_validate_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm, 304 int (*callback)(void *p, struct amdgpu_bo *bo), 305 void *param); 306 int amdgpu_vm_alloc_pts(struct amdgpu_device *adev, 307 struct amdgpu_vm *vm, 308 uint64_t saddr, uint64_t size); 309 int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job, bool need_pipe_sync); 310 int amdgpu_vm_update_directories(struct amdgpu_device *adev, 311 struct amdgpu_vm *vm); 312 int amdgpu_vm_clear_freed(struct amdgpu_device *adev, 313 struct amdgpu_vm *vm, 314 struct dma_fence **fence); 315 int amdgpu_vm_handle_moved(struct amdgpu_device *adev, 316 struct amdgpu_vm *vm); 317 int amdgpu_vm_bo_update(struct amdgpu_device *adev, 318 struct amdgpu_bo_va *bo_va, 319 bool clear); 320 void amdgpu_vm_bo_invalidate(struct amdgpu_device *adev, 321 struct amdgpu_bo *bo, bool evicted); 322 struct amdgpu_bo_va *amdgpu_vm_bo_find(struct amdgpu_vm *vm, 323 struct amdgpu_bo *bo); 324 struct amdgpu_bo_va *amdgpu_vm_bo_add(struct amdgpu_device *adev, 325 struct amdgpu_vm *vm, 326 struct amdgpu_bo *bo); 327 int amdgpu_vm_bo_map(struct amdgpu_device *adev, 328 struct amdgpu_bo_va *bo_va, 329 uint64_t addr, uint64_t offset, 330 uint64_t size, uint64_t flags); 331 int amdgpu_vm_bo_replace_map(struct amdgpu_device *adev, 332 struct amdgpu_bo_va *bo_va, 333 uint64_t addr, uint64_t offset, 334 uint64_t size, uint64_t flags); 335 int amdgpu_vm_bo_unmap(struct amdgpu_device *adev, 336 struct amdgpu_bo_va *bo_va, 337 uint64_t addr); 338 int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev, 339 struct amdgpu_vm *vm, 340 uint64_t saddr, uint64_t size); 341 struct amdgpu_bo_va_mapping *amdgpu_vm_bo_lookup_mapping(struct amdgpu_vm *vm, 342 uint64_t addr); 343 void amdgpu_vm_bo_trace_cs(struct amdgpu_vm *vm, struct ww_acquire_ctx *ticket); 344 void amdgpu_vm_bo_rmv(struct amdgpu_device *adev, 345 struct amdgpu_bo_va *bo_va); 346 void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t min_vm_size, 347 uint32_t fragment_size_default, unsigned max_level, 348 unsigned max_bits); 349 int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp); 350 bool amdgpu_vm_need_pipeline_sync(struct amdgpu_ring *ring, 351 struct amdgpu_job *job); 352 void amdgpu_vm_check_compute_bug(struct amdgpu_device *adev); 353 354 void amdgpu_vm_get_task_info(struct amdgpu_device *adev, unsigned int pasid, 355 struct amdgpu_task_info *task_info); 356 357 void amdgpu_vm_set_task_info(struct amdgpu_vm *vm); 358 359 void amdgpu_vm_move_to_lru_tail(struct amdgpu_device *adev, 360 struct amdgpu_vm *vm); 361 362 int amdgpu_vm_add_fault(struct amdgpu_retryfault_hashtable *fault_hash, u64 key); 363 364 void amdgpu_vm_clear_fault(struct amdgpu_retryfault_hashtable *fault_hash, u64 key); 365 366 void amdgpu_vm_del_from_lru_notify(struct ttm_buffer_object *bo); 367 368 #endif 369