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 /* PDE Block Fragment Size for VEGA10 */
80 #define AMDGPU_PDE_BFS(a) ((uint64_t)a << 59)
84 #define AMDGPU_PTE_MTYPE_VG10(a) ((uint64_t)(a) << 57)
85 #define AMDGPU_PTE_MTYPE_VG10_MASK AMDGPU_PTE_MTYPE_VG10(3ULL)
87 #define AMDGPU_MTYPE_NC 0
88 #define AMDGPU_MTYPE_CC 2
90 #define AMDGPU_PTE_DEFAULT_ATC (AMDGPU_PTE_SYSTEM \
91 | AMDGPU_PTE_SNOOPED \
92 | AMDGPU_PTE_EXECUTABLE \
93 | AMDGPU_PTE_READABLE \
94 | AMDGPU_PTE_WRITEABLE \
95 | AMDGPU_PTE_MTYPE_VG10(AMDGPU_MTYPE_CC))
98 #define AMDGPU_PTE_MTYPE_NV10(a) ((uint64_t)(a) << 48)
99 #define AMDGPU_PTE_MTYPE_NV10_MASK AMDGPU_PTE_MTYPE_NV10(7ULL)
101 /* How to program VM fault handling */
102 #define AMDGPU_VM_FAULT_STOP_NEVER 0
103 #define AMDGPU_VM_FAULT_STOP_FIRST 1
104 #define AMDGPU_VM_FAULT_STOP_ALWAYS 2
106 /* Reserve 4MB VRAM for page tables */
107 #define AMDGPU_VM_RESERVED_VRAM (4ULL << 20)
109 /* max number of VMHUB */
110 #define AMDGPU_MAX_VMHUBS 3
111 #define AMDGPU_GFXHUB_0 0
112 #define AMDGPU_MMHUB_0 1
113 #define AMDGPU_MMHUB_1 2
115 /* Reserve 2MB at top/bottom of address space for kernel use */
116 #define AMDGPU_VA_RESERVED_SIZE (2ULL << 20)
118 /* max vmids dedicated for process */
119 #define AMDGPU_VM_MAX_RESERVED_VMID 1
121 #define AMDGPU_VM_CONTEXT_GFX 0
122 #define AMDGPU_VM_CONTEXT_COMPUTE 1
124 /* See vm_update_mode */
125 #define AMDGPU_VM_USE_CPU_FOR_GFX (1 << 0)
126 #define AMDGPU_VM_USE_CPU_FOR_COMPUTE (1 << 1)
128 /* VMPT level enumerate, and the hiberachy is:
129 * PDB2->PDB1->PDB0->PTB
131 enum amdgpu_vm_level {
138 /* base structure for tracking BO usage in a VM */
139 struct amdgpu_vm_bo_base {
140 /* constant after initialization */
141 struct amdgpu_vm *vm;
142 struct amdgpu_bo *bo;
144 /* protected by bo being reserved */
145 struct amdgpu_vm_bo_base *next;
147 /* protected by spinlock */
148 struct list_head vm_status;
150 /* protected by the BO being reserved */
154 struct amdgpu_vm_pt {
155 struct amdgpu_vm_bo_base base;
157 /* array of page tables, one for each directory entry */
158 struct amdgpu_vm_pt *entries;
161 /* provided by hw blocks that can write ptes, e.g., sdma */
162 struct amdgpu_vm_pte_funcs {
163 /* number of dw to reserve per operation */
164 unsigned copy_pte_num_dw;
166 /* copy pte entries from GART */
167 void (*copy_pte)(struct amdgpu_ib *ib,
168 uint64_t pe, uint64_t src,
171 /* write pte one entry at a time with addr mapping */
172 void (*write_pte)(struct amdgpu_ib *ib, uint64_t pe,
173 uint64_t value, unsigned count,
175 /* for linear pte/pde updates without addr mapping */
176 void (*set_pte_pde)(struct amdgpu_ib *ib,
178 uint64_t addr, unsigned count,
179 uint32_t incr, uint64_t flags);
182 struct amdgpu_task_info {
183 char process_name[TASK_COMM_LEN];
184 char task_name[TASK_COMM_LEN];
190 * struct amdgpu_vm_update_params
192 * Encapsulate some VM table update parameters to reduce
193 * the number of function parameters
196 struct amdgpu_vm_update_params {
199 * @adev: amdgpu device we do this update for
201 struct amdgpu_device *adev;
204 * @vm: optional amdgpu_vm we do this update for
206 struct amdgpu_vm *vm;
209 * @immediate: if changes should be made immediately
214 * @unlocked: true if the root BO is not locked
221 * DMA addresses to use for mapping
223 dma_addr_t *pages_addr;
226 * @job: job to used for hw submission
228 struct amdgpu_job *job;
231 * @num_dw_left: number of dw left for the IB
233 unsigned int num_dw_left;
236 struct amdgpu_vm_update_funcs {
237 int (*map_table)(struct amdgpu_bo *bo);
238 int (*prepare)(struct amdgpu_vm_update_params *p, struct dma_resv *resv,
239 enum amdgpu_sync_mode sync_mode);
240 int (*update)(struct amdgpu_vm_update_params *p,
241 struct amdgpu_bo *bo, uint64_t pe, uint64_t addr,
242 unsigned count, uint32_t incr, uint64_t flags);
243 int (*commit)(struct amdgpu_vm_update_params *p,
244 struct dma_fence **fence);
248 /* tree of virtual addresses mapped */
249 struct rb_root_cached va;
251 /* Lock to prevent eviction while we are updating page tables
252 * use vm_eviction_lock/unlock(vm)
254 struct mutex eviction_lock;
256 unsigned int saved_flags;
258 /* BOs who needs a validation */
259 struct list_head evicted;
261 /* PT BOs which relocated and their parent need an update */
262 struct list_head relocated;
264 /* per VM BOs moved, but not yet updated in the PT */
265 struct list_head moved;
267 /* All BOs of this VM not currently in the state machine */
268 struct list_head idle;
270 /* regular invalidated BOs, but not yet updated in the PT */
271 struct list_head invalidated;
272 spinlock_t invalidated_lock;
274 /* BO mappings freed, but not yet updated in the PT */
275 struct list_head freed;
277 /* contains the page directory */
278 struct amdgpu_vm_pt root;
279 struct dma_fence *last_update;
281 /* Scheduler entities for page table updates */
282 struct drm_sched_entity immediate;
283 struct drm_sched_entity delayed;
285 /* Last unlocked submission to the scheduler entities */
286 struct dma_fence *last_unlocked;
289 /* dedicated to vm */
290 struct amdgpu_vmid *reserved_vmid[AMDGPU_MAX_VMHUBS];
292 /* Flag to indicate if VM tables are updated by CPU or GPU (SDMA) */
293 bool use_cpu_for_update;
295 /* Functions to use for VM table updates */
296 const struct amdgpu_vm_update_funcs *update_funcs;
298 /* Flag to indicate ATS support from PTE for GFX9 */
299 bool pte_support_ats;
301 /* Up to 128 pending retry page faults */
302 DECLARE_KFIFO(faults, u64, 128);
304 /* Points to the KFD process VM info */
305 struct amdkfd_process_info *process_info;
307 /* List node in amdkfd_process_info.vm_list_head */
308 struct list_head vm_list_node;
310 /* Valid while the PD is reserved or fenced */
311 uint64_t pd_phys_addr;
313 /* Some basic info about the task */
314 struct amdgpu_task_info task_info;
316 /* Store positions of group of BOs */
317 struct ttm_lru_bulk_move lru_bulk_move;
318 /* mark whether can do the bulk move */
320 /* Flag to indicate if VM is used for compute */
321 bool is_compute_context;
324 struct amdgpu_vm_manager {
325 /* Handling of VMIDs */
326 struct amdgpu_vmid_mgr id_mgr[AMDGPU_MAX_VMHUBS];
327 unsigned int first_kfd_vmid;
329 /* Handling of VM fences */
331 unsigned seqno[AMDGPU_MAX_RINGS];
336 uint32_t fragment_size;
337 enum amdgpu_vm_level root_level;
338 /* vram base address for page table entry */
339 u64 vram_base_offset;
340 /* vm pte handling */
341 const struct amdgpu_vm_pte_funcs *vm_pte_funcs;
342 struct drm_gpu_scheduler *vm_pte_scheds[AMDGPU_MAX_RINGS];
343 unsigned vm_pte_num_scheds;
344 struct amdgpu_ring *page_fault;
346 /* partial resident texture handling */
348 atomic_t num_prt_users;
350 /* controls how VM page tables are updated for Graphics and Compute.
351 * BIT0[= 0] Graphics updated by SDMA [= 1] by CPU
352 * BIT1[= 0] Compute updated by SDMA [= 1] by CPU
356 /* PASID to VM mapping, will be used in interrupt context to
357 * look up VM of a page fault
359 struct idr pasid_idr;
360 spinlock_t pasid_lock;
363 #define amdgpu_vm_copy_pte(adev, ib, pe, src, count) ((adev)->vm_manager.vm_pte_funcs->copy_pte((ib), (pe), (src), (count)))
364 #define amdgpu_vm_write_pte(adev, ib, pe, value, count, incr) ((adev)->vm_manager.vm_pte_funcs->write_pte((ib), (pe), (value), (count), (incr)))
365 #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)))
367 extern const struct amdgpu_vm_update_funcs amdgpu_vm_cpu_funcs;
368 extern const struct amdgpu_vm_update_funcs amdgpu_vm_sdma_funcs;
370 void amdgpu_vm_manager_init(struct amdgpu_device *adev);
371 void amdgpu_vm_manager_fini(struct amdgpu_device *adev);
373 long amdgpu_vm_wait_idle(struct amdgpu_vm *vm, long timeout);
374 int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
375 int vm_context, u32 pasid);
376 int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm, u32 pasid);
377 void amdgpu_vm_release_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm);
378 void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm);
379 void amdgpu_vm_get_pd_bo(struct amdgpu_vm *vm,
380 struct list_head *validated,
381 struct amdgpu_bo_list_entry *entry);
382 bool amdgpu_vm_ready(struct amdgpu_vm *vm);
383 int amdgpu_vm_validate_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm,
384 int (*callback)(void *p, struct amdgpu_bo *bo),
386 int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job, bool need_pipe_sync);
387 int amdgpu_vm_update_pdes(struct amdgpu_device *adev,
388 struct amdgpu_vm *vm, bool immediate);
389 int amdgpu_vm_clear_freed(struct amdgpu_device *adev,
390 struct amdgpu_vm *vm,
391 struct dma_fence **fence);
392 int amdgpu_vm_handle_moved(struct amdgpu_device *adev,
393 struct amdgpu_vm *vm);
394 int amdgpu_vm_bo_update(struct amdgpu_device *adev,
395 struct amdgpu_bo_va *bo_va,
397 bool amdgpu_vm_evictable(struct amdgpu_bo *bo);
398 void amdgpu_vm_bo_invalidate(struct amdgpu_device *adev,
399 struct amdgpu_bo *bo, bool evicted);
400 uint64_t amdgpu_vm_map_gart(const dma_addr_t *pages_addr, uint64_t addr);
401 struct amdgpu_bo_va *amdgpu_vm_bo_find(struct amdgpu_vm *vm,
402 struct amdgpu_bo *bo);
403 struct amdgpu_bo_va *amdgpu_vm_bo_add(struct amdgpu_device *adev,
404 struct amdgpu_vm *vm,
405 struct amdgpu_bo *bo);
406 int amdgpu_vm_bo_map(struct amdgpu_device *adev,
407 struct amdgpu_bo_va *bo_va,
408 uint64_t addr, uint64_t offset,
409 uint64_t size, uint64_t flags);
410 int amdgpu_vm_bo_replace_map(struct amdgpu_device *adev,
411 struct amdgpu_bo_va *bo_va,
412 uint64_t addr, uint64_t offset,
413 uint64_t size, uint64_t flags);
414 int amdgpu_vm_bo_unmap(struct amdgpu_device *adev,
415 struct amdgpu_bo_va *bo_va,
417 int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev,
418 struct amdgpu_vm *vm,
419 uint64_t saddr, uint64_t size);
420 struct amdgpu_bo_va_mapping *amdgpu_vm_bo_lookup_mapping(struct amdgpu_vm *vm,
422 void amdgpu_vm_bo_trace_cs(struct amdgpu_vm *vm, struct ww_acquire_ctx *ticket);
423 void amdgpu_vm_bo_rmv(struct amdgpu_device *adev,
424 struct amdgpu_bo_va *bo_va);
425 void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t min_vm_size,
426 uint32_t fragment_size_default, unsigned max_level,
428 int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp);
429 bool amdgpu_vm_need_pipeline_sync(struct amdgpu_ring *ring,
430 struct amdgpu_job *job);
431 void amdgpu_vm_check_compute_bug(struct amdgpu_device *adev);
433 void amdgpu_vm_get_task_info(struct amdgpu_device *adev, u32 pasid,
434 struct amdgpu_task_info *task_info);
435 bool amdgpu_vm_handle_fault(struct amdgpu_device *adev, u32 pasid,
438 void amdgpu_vm_set_task_info(struct amdgpu_vm *vm);
440 void amdgpu_vm_move_to_lru_tail(struct amdgpu_device *adev,
441 struct amdgpu_vm *vm);
442 void amdgpu_vm_del_from_lru_notify(struct ttm_buffer_object *bo);