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;
47 /* Maximum number of PTEs the hardware can write with one command */
48 #define AMDGPU_VM_MAX_UPDATE_SIZE 0x3FFFF
50 /* number of entries in page table */
51 #define AMDGPU_VM_PTE_COUNT(adev) (1 << (adev)->vm_manager.block_size)
53 #define AMDGPU_PTE_VALID (1ULL << 0)
54 #define AMDGPU_PTE_SYSTEM (1ULL << 1)
55 #define AMDGPU_PTE_SNOOPED (1ULL << 2)
58 #define AMDGPU_PTE_TMZ (1ULL << 3)
61 #define AMDGPU_PTE_EXECUTABLE (1ULL << 4)
63 #define AMDGPU_PTE_READABLE (1ULL << 5)
64 #define AMDGPU_PTE_WRITEABLE (1ULL << 6)
66 #define AMDGPU_PTE_FRAG(x) ((x & 0x1fULL) << 7)
68 /* TILED for VEGA10, reserved for older ASICs */
69 #define AMDGPU_PTE_PRT (1ULL << 51)
71 /* PDE is handled as PTE for VEGA10 */
72 #define AMDGPU_PDE_PTE (1ULL << 54)
74 #define AMDGPU_PTE_LOG (1ULL << 55)
76 /* PTE is handled as PDE for VEGA10 (Translate Further) */
77 #define AMDGPU_PTE_TF (1ULL << 56)
79 /* MALL noalloc for sienna_cichlid, reserved for older ASICs */
80 #define AMDGPU_PTE_NOALLOC (1ULL << 58)
82 /* PDE Block Fragment Size for VEGA10 */
83 #define AMDGPU_PDE_BFS(a) ((uint64_t)a << 59)
87 #define AMDGPU_PTE_MTYPE_VG10(a) ((uint64_t)(a) << 57)
88 #define AMDGPU_PTE_MTYPE_VG10_MASK AMDGPU_PTE_MTYPE_VG10(3ULL)
90 #define AMDGPU_MTYPE_NC 0
91 #define AMDGPU_MTYPE_CC 2
93 #define AMDGPU_PTE_DEFAULT_ATC (AMDGPU_PTE_SYSTEM \
94 | AMDGPU_PTE_SNOOPED \
95 | AMDGPU_PTE_EXECUTABLE \
96 | AMDGPU_PTE_READABLE \
97 | AMDGPU_PTE_WRITEABLE \
98 | AMDGPU_PTE_MTYPE_VG10(AMDGPU_MTYPE_CC))
101 #define AMDGPU_PTE_MTYPE_NV10(a) ((uint64_t)(a) << 48)
102 #define AMDGPU_PTE_MTYPE_NV10_MASK AMDGPU_PTE_MTYPE_NV10(7ULL)
104 /* How to program VM fault handling */
105 #define AMDGPU_VM_FAULT_STOP_NEVER 0
106 #define AMDGPU_VM_FAULT_STOP_FIRST 1
107 #define AMDGPU_VM_FAULT_STOP_ALWAYS 2
109 /* Reserve 4MB VRAM for page tables */
110 #define AMDGPU_VM_RESERVED_VRAM (8ULL << 20)
112 /* max number of VMHUB */
113 #define AMDGPU_MAX_VMHUBS 3
114 #define AMDGPU_GFXHUB_0 0
115 #define AMDGPU_MMHUB_0 1
116 #define AMDGPU_MMHUB_1 2
118 /* Reserve 2MB at top/bottom of address space for kernel use */
119 #define AMDGPU_VA_RESERVED_SIZE (2ULL << 20)
121 /* max vmids dedicated for process */
122 #define AMDGPU_VM_MAX_RESERVED_VMID 1
124 #define AMDGPU_VM_CONTEXT_GFX 0
125 #define AMDGPU_VM_CONTEXT_COMPUTE 1
127 /* See vm_update_mode */
128 #define AMDGPU_VM_USE_CPU_FOR_GFX (1 << 0)
129 #define AMDGPU_VM_USE_CPU_FOR_COMPUTE (1 << 1)
131 /* VMPT level enumerate, and the hiberachy is:
132 * PDB2->PDB1->PDB0->PTB
134 enum amdgpu_vm_level {
141 /* base structure for tracking BO usage in a VM */
142 struct amdgpu_vm_bo_base {
143 /* constant after initialization */
144 struct amdgpu_vm *vm;
145 struct amdgpu_bo *bo;
147 /* protected by bo being reserved */
148 struct amdgpu_vm_bo_base *next;
150 /* protected by spinlock */
151 struct list_head vm_status;
153 /* protected by the BO being reserved */
157 struct amdgpu_vm_pt {
158 struct amdgpu_vm_bo_base base;
160 /* array of page tables, one for each directory entry */
161 struct amdgpu_vm_pt *entries;
164 /* provided by hw blocks that can write ptes, e.g., sdma */
165 struct amdgpu_vm_pte_funcs {
166 /* number of dw to reserve per operation */
167 unsigned copy_pte_num_dw;
169 /* copy pte entries from GART */
170 void (*copy_pte)(struct amdgpu_ib *ib,
171 uint64_t pe, uint64_t src,
174 /* write pte one entry at a time with addr mapping */
175 void (*write_pte)(struct amdgpu_ib *ib, uint64_t pe,
176 uint64_t value, unsigned count,
178 /* for linear pte/pde updates without addr mapping */
179 void (*set_pte_pde)(struct amdgpu_ib *ib,
181 uint64_t addr, unsigned count,
182 uint32_t incr, uint64_t flags);
185 struct amdgpu_task_info {
186 char process_name[TASK_COMM_LEN];
187 char task_name[TASK_COMM_LEN];
193 * struct amdgpu_vm_update_params
195 * Encapsulate some VM table update parameters to reduce
196 * the number of function parameters
199 struct amdgpu_vm_update_params {
202 * @adev: amdgpu device we do this update for
204 struct amdgpu_device *adev;
207 * @vm: optional amdgpu_vm we do this update for
209 struct amdgpu_vm *vm;
212 * @immediate: if changes should be made immediately
217 * @unlocked: true if the root BO is not locked
224 * DMA addresses to use for mapping
226 dma_addr_t *pages_addr;
229 * @job: job to used for hw submission
231 struct amdgpu_job *job;
234 * @num_dw_left: number of dw left for the IB
236 unsigned int num_dw_left;
239 struct amdgpu_vm_update_funcs {
240 int (*map_table)(struct amdgpu_bo *bo);
241 int (*prepare)(struct amdgpu_vm_update_params *p, struct dma_resv *resv,
242 enum amdgpu_sync_mode sync_mode);
243 int (*update)(struct amdgpu_vm_update_params *p,
244 struct amdgpu_bo *bo, uint64_t pe, uint64_t addr,
245 unsigned count, uint32_t incr, uint64_t flags);
246 int (*commit)(struct amdgpu_vm_update_params *p,
247 struct dma_fence **fence);
251 /* tree of virtual addresses mapped */
252 struct rb_root_cached va;
254 /* Lock to prevent eviction while we are updating page tables
255 * use vm_eviction_lock/unlock(vm)
257 struct mutex eviction_lock;
259 unsigned int saved_flags;
261 /* BOs who needs a validation */
262 struct list_head evicted;
264 /* PT BOs which relocated and their parent need an update */
265 struct list_head relocated;
267 /* per VM BOs moved, but not yet updated in the PT */
268 struct list_head moved;
270 /* All BOs of this VM not currently in the state machine */
271 struct list_head idle;
273 /* regular invalidated BOs, but not yet updated in the PT */
274 struct list_head invalidated;
275 spinlock_t invalidated_lock;
277 /* BO mappings freed, but not yet updated in the PT */
278 struct list_head freed;
280 /* BOs which are invalidated, has been updated in the PTs */
281 struct list_head done;
283 /* contains the page directory */
284 struct amdgpu_vm_pt root;
285 struct dma_fence *last_update;
287 /* Scheduler entities for page table updates */
288 struct drm_sched_entity immediate;
289 struct drm_sched_entity delayed;
291 /* Last unlocked submission to the scheduler entities */
292 struct dma_fence *last_unlocked;
295 /* dedicated to vm */
296 struct amdgpu_vmid *reserved_vmid[AMDGPU_MAX_VMHUBS];
298 /* Flag to indicate if VM tables are updated by CPU or GPU (SDMA) */
299 bool use_cpu_for_update;
301 /* Functions to use for VM table updates */
302 const struct amdgpu_vm_update_funcs *update_funcs;
304 /* Flag to indicate ATS support from PTE for GFX9 */
305 bool pte_support_ats;
307 /* Up to 128 pending retry page faults */
308 DECLARE_KFIFO(faults, u64, 128);
310 /* Points to the KFD process VM info */
311 struct amdkfd_process_info *process_info;
313 /* List node in amdkfd_process_info.vm_list_head */
314 struct list_head vm_list_node;
316 /* Valid while the PD is reserved or fenced */
317 uint64_t pd_phys_addr;
319 /* Some basic info about the task */
320 struct amdgpu_task_info task_info;
322 /* Store positions of group of BOs */
323 struct ttm_lru_bulk_move lru_bulk_move;
324 /* mark whether can do the bulk move */
326 /* Flag to indicate if VM is used for compute */
327 bool is_compute_context;
330 struct amdgpu_vm_manager {
331 /* Handling of VMIDs */
332 struct amdgpu_vmid_mgr id_mgr[AMDGPU_MAX_VMHUBS];
333 unsigned int first_kfd_vmid;
334 bool concurrent_flush;
336 /* Handling of VM fences */
338 unsigned seqno[AMDGPU_MAX_RINGS];
343 uint32_t fragment_size;
344 enum amdgpu_vm_level root_level;
345 /* vram base address for page table entry */
346 u64 vram_base_offset;
347 /* vm pte handling */
348 const struct amdgpu_vm_pte_funcs *vm_pte_funcs;
349 struct drm_gpu_scheduler *vm_pte_scheds[AMDGPU_MAX_RINGS];
350 unsigned vm_pte_num_scheds;
351 struct amdgpu_ring *page_fault;
353 /* partial resident texture handling */
355 atomic_t num_prt_users;
357 /* controls how VM page tables are updated for Graphics and Compute.
358 * BIT0[= 0] Graphics updated by SDMA [= 1] by CPU
359 * BIT1[= 0] Compute updated by SDMA [= 1] by CPU
363 /* PASID to VM mapping, will be used in interrupt context to
364 * look up VM of a page fault
366 struct idr pasid_idr;
367 spinlock_t pasid_lock;
370 #define amdgpu_vm_copy_pte(adev, ib, pe, src, count) ((adev)->vm_manager.vm_pte_funcs->copy_pte((ib), (pe), (src), (count)))
371 #define amdgpu_vm_write_pte(adev, ib, pe, value, count, incr) ((adev)->vm_manager.vm_pte_funcs->write_pte((ib), (pe), (value), (count), (incr)))
372 #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)))
374 extern const struct amdgpu_vm_update_funcs amdgpu_vm_cpu_funcs;
375 extern const struct amdgpu_vm_update_funcs amdgpu_vm_sdma_funcs;
377 void amdgpu_vm_manager_init(struct amdgpu_device *adev);
378 void amdgpu_vm_manager_fini(struct amdgpu_device *adev);
380 long amdgpu_vm_wait_idle(struct amdgpu_vm *vm, long timeout);
381 int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
382 int vm_context, u32 pasid);
383 int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm, u32 pasid);
384 void amdgpu_vm_release_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm);
385 void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm);
386 void amdgpu_vm_get_pd_bo(struct amdgpu_vm *vm,
387 struct list_head *validated,
388 struct amdgpu_bo_list_entry *entry);
389 bool amdgpu_vm_ready(struct amdgpu_vm *vm);
390 int amdgpu_vm_validate_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm,
391 int (*callback)(void *p, struct amdgpu_bo *bo),
393 int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job, bool need_pipe_sync);
394 int amdgpu_vm_update_pdes(struct amdgpu_device *adev,
395 struct amdgpu_vm *vm, bool immediate);
396 int amdgpu_vm_clear_freed(struct amdgpu_device *adev,
397 struct amdgpu_vm *vm,
398 struct dma_fence **fence);
399 int amdgpu_vm_handle_moved(struct amdgpu_device *adev,
400 struct amdgpu_vm *vm);
401 int amdgpu_vm_bo_update(struct amdgpu_device *adev,
402 struct amdgpu_bo_va *bo_va,
404 bool amdgpu_vm_evictable(struct amdgpu_bo *bo);
405 void amdgpu_vm_bo_invalidate(struct amdgpu_device *adev,
406 struct amdgpu_bo *bo, bool evicted);
407 uint64_t amdgpu_vm_map_gart(const dma_addr_t *pages_addr, uint64_t addr);
408 struct amdgpu_bo_va *amdgpu_vm_bo_find(struct amdgpu_vm *vm,
409 struct amdgpu_bo *bo);
410 struct amdgpu_bo_va *amdgpu_vm_bo_add(struct amdgpu_device *adev,
411 struct amdgpu_vm *vm,
412 struct amdgpu_bo *bo);
413 int amdgpu_vm_bo_map(struct amdgpu_device *adev,
414 struct amdgpu_bo_va *bo_va,
415 uint64_t addr, uint64_t offset,
416 uint64_t size, uint64_t flags);
417 int amdgpu_vm_bo_replace_map(struct amdgpu_device *adev,
418 struct amdgpu_bo_va *bo_va,
419 uint64_t addr, uint64_t offset,
420 uint64_t size, uint64_t flags);
421 int amdgpu_vm_bo_unmap(struct amdgpu_device *adev,
422 struct amdgpu_bo_va *bo_va,
424 int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev,
425 struct amdgpu_vm *vm,
426 uint64_t saddr, uint64_t size);
427 struct amdgpu_bo_va_mapping *amdgpu_vm_bo_lookup_mapping(struct amdgpu_vm *vm,
429 void amdgpu_vm_bo_trace_cs(struct amdgpu_vm *vm, struct ww_acquire_ctx *ticket);
430 void amdgpu_vm_bo_rmv(struct amdgpu_device *adev,
431 struct amdgpu_bo_va *bo_va);
432 void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t min_vm_size,
433 uint32_t fragment_size_default, unsigned max_level,
435 int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp);
436 bool amdgpu_vm_need_pipeline_sync(struct amdgpu_ring *ring,
437 struct amdgpu_job *job);
438 void amdgpu_vm_check_compute_bug(struct amdgpu_device *adev);
440 void amdgpu_vm_get_task_info(struct amdgpu_device *adev, u32 pasid,
441 struct amdgpu_task_info *task_info);
442 bool amdgpu_vm_handle_fault(struct amdgpu_device *adev, u32 pasid,
445 void amdgpu_vm_set_task_info(struct amdgpu_vm *vm);
447 void amdgpu_vm_move_to_lru_tail(struct amdgpu_device *adev,
448 struct amdgpu_vm *vm);
449 void amdgpu_vm_del_from_lru_notify(struct ttm_buffer_object *bo);
451 #if defined(CONFIG_DEBUG_FS)
452 void amdgpu_debugfs_vm_bo_info(struct amdgpu_vm *vm, struct seq_file *m);