2 * Copyright 2016 Advanced Micro Devices, Inc.
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
22 * Authors: Christian König
24 #ifndef __AMDGPU_VM_H__
25 #define __AMDGPU_VM_H__
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>
35 #include "amdgpu_sync.h"
36 #include "amdgpu_ring.h"
37 #include "amdgpu_ids.h"
41 struct amdgpu_bo_list_entry;
48 /* Maximum number of PTEs the hardware can write with one command */
49 #define AMDGPU_VM_MAX_UPDATE_SIZE 0x3FFFF
51 /* number of entries in page table */
52 #define AMDGPU_VM_PTE_COUNT(adev) (1 << (adev)->vm_manager.block_size)
54 #define AMDGPU_PTE_VALID (1ULL << 0)
55 #define AMDGPU_PTE_SYSTEM (1ULL << 1)
56 #define AMDGPU_PTE_SNOOPED (1ULL << 2)
59 #define AMDGPU_PTE_TMZ (1ULL << 3)
62 #define AMDGPU_PTE_EXECUTABLE (1ULL << 4)
64 #define AMDGPU_PTE_READABLE (1ULL << 5)
65 #define AMDGPU_PTE_WRITEABLE (1ULL << 6)
67 #define AMDGPU_PTE_FRAG(x) ((x & 0x1fULL) << 7)
69 /* TILED for VEGA10, reserved for older ASICs */
70 #define AMDGPU_PTE_PRT (1ULL << 51)
72 /* PDE is handled as PTE for VEGA10 */
73 #define AMDGPU_PDE_PTE (1ULL << 54)
75 #define AMDGPU_PTE_LOG (1ULL << 55)
77 /* PTE is handled as PDE for VEGA10 (Translate Further) */
78 #define AMDGPU_PTE_TF (1ULL << 56)
80 /* MALL noalloc for sienna_cichlid, reserved for older ASICs */
81 #define AMDGPU_PTE_NOALLOC (1ULL << 58)
83 /* PDE Block Fragment Size for VEGA10 */
84 #define AMDGPU_PDE_BFS(a) ((uint64_t)a << 59)
88 #define AMDGPU_PTE_MTYPE_VG10(a) ((uint64_t)(a) << 57)
89 #define AMDGPU_PTE_MTYPE_VG10_MASK AMDGPU_PTE_MTYPE_VG10(3ULL)
91 #define AMDGPU_MTYPE_NC 0
92 #define AMDGPU_MTYPE_CC 2
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))
102 #define AMDGPU_PTE_MTYPE_NV10(a) ((uint64_t)(a) << 48)
103 #define AMDGPU_PTE_MTYPE_NV10_MASK AMDGPU_PTE_MTYPE_NV10(7ULL)
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
110 /* Reserve 4MB VRAM for page tables */
111 #define AMDGPU_VM_RESERVED_VRAM (8ULL << 20)
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
119 /* Reserve 2MB at top/bottom of address space for kernel use */
120 #define AMDGPU_VA_RESERVED_SIZE (2ULL << 20)
122 /* max vmids dedicated for process */
123 #define AMDGPU_VM_MAX_RESERVED_VMID 1
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)
129 /* VMPT level enumerate, and the hiberachy is:
130 * PDB2->PDB1->PDB0->PTB
132 enum amdgpu_vm_level {
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;
145 /* protected by bo being reserved */
146 struct amdgpu_vm_bo_base *next;
148 /* protected by spinlock */
149 struct list_head vm_status;
151 /* protected by the BO being reserved */
155 struct amdgpu_vm_pt {
156 struct amdgpu_vm_bo_base base;
158 /* array of page tables, one for each directory entry */
159 struct amdgpu_vm_pt *entries;
162 /* provided by hw blocks that can write ptes, e.g., sdma */
163 struct amdgpu_vm_pte_funcs {
164 /* number of dw to reserve per operation */
165 unsigned copy_pte_num_dw;
167 /* copy pte entries from GART */
168 void (*copy_pte)(struct amdgpu_ib *ib,
169 uint64_t pe, uint64_t src,
172 /* write pte one entry at a time with addr mapping */
173 void (*write_pte)(struct amdgpu_ib *ib, uint64_t pe,
174 uint64_t value, unsigned count,
176 /* for linear pte/pde updates without addr mapping */
177 void (*set_pte_pde)(struct amdgpu_ib *ib,
179 uint64_t addr, unsigned count,
180 uint32_t incr, uint64_t flags);
183 struct amdgpu_task_info {
184 char process_name[TASK_COMM_LEN];
185 char task_name[TASK_COMM_LEN];
191 * struct amdgpu_vm_update_params
193 * Encapsulate some VM table update parameters to reduce
194 * the number of function parameters
197 struct amdgpu_vm_update_params {
200 * @adev: amdgpu device we do this update for
202 struct amdgpu_device *adev;
205 * @vm: optional amdgpu_vm we do this update for
207 struct amdgpu_vm *vm;
210 * @immediate: if changes should be made immediately
215 * @unlocked: true if the root BO is not locked
222 * DMA addresses to use for mapping
224 dma_addr_t *pages_addr;
227 * @job: job to used for hw submission
229 struct amdgpu_job *job;
232 * @num_dw_left: number of dw left for the IB
234 unsigned int num_dw_left;
237 * @table_freed: return true if page table is freed when updating
242 struct amdgpu_vm_update_funcs {
243 int (*map_table)(struct amdgpu_bo_vm *bo);
244 int (*prepare)(struct amdgpu_vm_update_params *p, struct dma_resv *resv,
245 enum amdgpu_sync_mode sync_mode);
246 int (*update)(struct amdgpu_vm_update_params *p,
247 struct amdgpu_bo_vm *bo, uint64_t pe, uint64_t addr,
248 unsigned count, uint32_t incr, uint64_t flags);
249 int (*commit)(struct amdgpu_vm_update_params *p,
250 struct dma_fence **fence);
254 /* tree of virtual addresses mapped */
255 struct rb_root_cached va;
257 /* Lock to prevent eviction while we are updating page tables
258 * use vm_eviction_lock/unlock(vm)
260 struct mutex eviction_lock;
262 unsigned int saved_flags;
264 /* BOs who needs a validation */
265 struct list_head evicted;
267 /* PT BOs which relocated and their parent need an update */
268 struct list_head relocated;
270 /* per VM BOs moved, but not yet updated in the PT */
271 struct list_head moved;
273 /* All BOs of this VM not currently in the state machine */
274 struct list_head idle;
276 /* regular invalidated BOs, but not yet updated in the PT */
277 struct list_head invalidated;
278 spinlock_t invalidated_lock;
280 /* BO mappings freed, but not yet updated in the PT */
281 struct list_head freed;
283 /* BOs which are invalidated, has been updated in the PTs */
284 struct list_head done;
286 /* contains the page directory */
287 struct amdgpu_vm_pt root;
288 struct dma_fence *last_update;
290 /* Scheduler entities for page table updates */
291 struct drm_sched_entity immediate;
292 struct drm_sched_entity delayed;
294 /* Last unlocked submission to the scheduler entities */
295 struct dma_fence *last_unlocked;
298 /* dedicated to vm */
299 struct amdgpu_vmid *reserved_vmid[AMDGPU_MAX_VMHUBS];
301 /* Flag to indicate if VM tables are updated by CPU or GPU (SDMA) */
302 bool use_cpu_for_update;
304 /* Functions to use for VM table updates */
305 const struct amdgpu_vm_update_funcs *update_funcs;
307 /* Flag to indicate ATS support from PTE for GFX9 */
308 bool pte_support_ats;
310 /* Up to 128 pending retry page faults */
311 DECLARE_KFIFO(faults, u64, 128);
313 /* Points to the KFD process VM info */
314 struct amdkfd_process_info *process_info;
316 /* List node in amdkfd_process_info.vm_list_head */
317 struct list_head vm_list_node;
319 /* Valid while the PD is reserved or fenced */
320 uint64_t pd_phys_addr;
322 /* Some basic info about the task */
323 struct amdgpu_task_info task_info;
325 /* Store positions of group of BOs */
326 struct ttm_lru_bulk_move lru_bulk_move;
327 /* mark whether can do the bulk move */
329 /* Flag to indicate if VM is used for compute */
330 bool is_compute_context;
333 struct amdgpu_vm_manager {
334 /* Handling of VMIDs */
335 struct amdgpu_vmid_mgr id_mgr[AMDGPU_MAX_VMHUBS];
336 unsigned int first_kfd_vmid;
337 bool concurrent_flush;
339 /* Handling of VM fences */
341 unsigned seqno[AMDGPU_MAX_RINGS];
346 uint32_t fragment_size;
347 enum amdgpu_vm_level root_level;
348 /* vram base address for page table entry */
349 u64 vram_base_offset;
350 /* vm pte handling */
351 const struct amdgpu_vm_pte_funcs *vm_pte_funcs;
352 struct drm_gpu_scheduler *vm_pte_scheds[AMDGPU_MAX_RINGS];
353 unsigned vm_pte_num_scheds;
354 struct amdgpu_ring *page_fault;
356 /* partial resident texture handling */
358 atomic_t num_prt_users;
360 /* controls how VM page tables are updated for Graphics and Compute.
361 * BIT0[= 0] Graphics updated by SDMA [= 1] by CPU
362 * BIT1[= 0] Compute updated by SDMA [= 1] by CPU
366 /* PASID to VM mapping, will be used in interrupt context to
367 * look up VM of a page fault
369 struct idr pasid_idr;
370 spinlock_t pasid_lock;
373 struct amdgpu_bo_va_mapping;
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)))
379 extern const struct amdgpu_vm_update_funcs amdgpu_vm_cpu_funcs;
380 extern const struct amdgpu_vm_update_funcs amdgpu_vm_sdma_funcs;
382 void amdgpu_vm_manager_init(struct amdgpu_device *adev);
383 void amdgpu_vm_manager_fini(struct amdgpu_device *adev);
385 long amdgpu_vm_wait_idle(struct amdgpu_vm *vm, long timeout);
386 int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm, u32 pasid);
387 int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm, u32 pasid);
388 void amdgpu_vm_release_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm);
389 void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm);
390 void amdgpu_vm_get_pd_bo(struct amdgpu_vm *vm,
391 struct list_head *validated,
392 struct amdgpu_bo_list_entry *entry);
393 bool amdgpu_vm_ready(struct amdgpu_vm *vm);
394 int amdgpu_vm_validate_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm,
395 int (*callback)(void *p, struct amdgpu_bo *bo),
397 int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job, bool need_pipe_sync);
398 int amdgpu_vm_update_pdes(struct amdgpu_device *adev,
399 struct amdgpu_vm *vm, bool immediate);
400 int amdgpu_vm_clear_freed(struct amdgpu_device *adev,
401 struct amdgpu_vm *vm,
402 struct dma_fence **fence);
403 int amdgpu_vm_handle_moved(struct amdgpu_device *adev,
404 struct amdgpu_vm *vm);
405 int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
406 struct amdgpu_device *bo_adev,
407 struct amdgpu_vm *vm, bool immediate,
408 bool unlocked, struct dma_resv *resv,
409 uint64_t start, uint64_t last,
410 uint64_t flags, uint64_t offset,
411 struct ttm_resource *res,
412 dma_addr_t *pages_addr,
413 struct dma_fence **fence, bool *free_table);
414 int amdgpu_vm_bo_update(struct amdgpu_device *adev,
415 struct amdgpu_bo_va *bo_va,
417 bool amdgpu_vm_evictable(struct amdgpu_bo *bo);
418 void amdgpu_vm_bo_invalidate(struct amdgpu_device *adev,
419 struct amdgpu_bo *bo, bool evicted);
420 uint64_t amdgpu_vm_map_gart(const dma_addr_t *pages_addr, uint64_t addr);
421 struct amdgpu_bo_va *amdgpu_vm_bo_find(struct amdgpu_vm *vm,
422 struct amdgpu_bo *bo);
423 struct amdgpu_bo_va *amdgpu_vm_bo_add(struct amdgpu_device *adev,
424 struct amdgpu_vm *vm,
425 struct amdgpu_bo *bo);
426 int amdgpu_vm_bo_map(struct amdgpu_device *adev,
427 struct amdgpu_bo_va *bo_va,
428 uint64_t addr, uint64_t offset,
429 uint64_t size, uint64_t flags);
430 int amdgpu_vm_bo_replace_map(struct amdgpu_device *adev,
431 struct amdgpu_bo_va *bo_va,
432 uint64_t addr, uint64_t offset,
433 uint64_t size, uint64_t flags);
434 int amdgpu_vm_bo_unmap(struct amdgpu_device *adev,
435 struct amdgpu_bo_va *bo_va,
437 int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev,
438 struct amdgpu_vm *vm,
439 uint64_t saddr, uint64_t size);
440 struct amdgpu_bo_va_mapping *amdgpu_vm_bo_lookup_mapping(struct amdgpu_vm *vm,
442 void amdgpu_vm_bo_trace_cs(struct amdgpu_vm *vm, struct ww_acquire_ctx *ticket);
443 void amdgpu_vm_bo_rmv(struct amdgpu_device *adev,
444 struct amdgpu_bo_va *bo_va);
445 void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t min_vm_size,
446 uint32_t fragment_size_default, unsigned max_level,
448 int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp);
449 bool amdgpu_vm_need_pipeline_sync(struct amdgpu_ring *ring,
450 struct amdgpu_job *job);
451 void amdgpu_vm_check_compute_bug(struct amdgpu_device *adev);
453 void amdgpu_vm_get_task_info(struct amdgpu_device *adev, u32 pasid,
454 struct amdgpu_task_info *task_info);
455 bool amdgpu_vm_handle_fault(struct amdgpu_device *adev, u32 pasid,
458 void amdgpu_vm_set_task_info(struct amdgpu_vm *vm);
460 void amdgpu_vm_move_to_lru_tail(struct amdgpu_device *adev,
461 struct amdgpu_vm *vm);
462 void amdgpu_vm_del_from_lru_notify(struct ttm_buffer_object *bo);
463 void amdgpu_vm_get_memory(struct amdgpu_vm *vm, uint64_t *vram_mem,
464 uint64_t *gtt_mem, uint64_t *cpu_mem);
466 #if defined(CONFIG_DEBUG_FS)
467 void amdgpu_debugfs_vm_bo_info(struct amdgpu_vm *vm, struct seq_file *m);