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1/*
2 * Copyright 2008 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 * Copyright 2009 Jerome Glisse.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Dave Airlie
25 * Alex Deucher
26 * Jerome Glisse
27 */
28
29#include <linux/dma-fence-array.h>
30#include <linux/interval_tree_generic.h>
31#include <linux/idr.h>
32#include <linux/dma-buf.h>
33
34#include <drm/amdgpu_drm.h>
35#include <drm/drm_drv.h>
36#include <drm/ttm/ttm_tt.h>
37#include <drm/drm_exec.h>
38#include "amdgpu.h"
39#include "amdgpu_trace.h"
40#include "amdgpu_amdkfd.h"
41#include "amdgpu_gmc.h"
42#include "amdgpu_xgmi.h"
43#include "amdgpu_dma_buf.h"
44#include "amdgpu_res_cursor.h"
45#include "kfd_svm.h"
46
47/**
48 * DOC: GPUVM
49 *
50 * GPUVM is the MMU functionality provided on the GPU.
51 * GPUVM is similar to the legacy GART on older asics, however
52 * rather than there being a single global GART table
53 * for the entire GPU, there can be multiple GPUVM page tables active
54 * at any given time. The GPUVM page tables can contain a mix
55 * VRAM pages and system pages (both memory and MMIO) and system pages
56 * can be mapped as snooped (cached system pages) or unsnooped
57 * (uncached system pages).
58 *
59 * Each active GPUVM has an ID associated with it and there is a page table
60 * linked with each VMID. When executing a command buffer,
61 * the kernel tells the engine what VMID to use for that command
62 * buffer. VMIDs are allocated dynamically as commands are submitted.
63 * The userspace drivers maintain their own address space and the kernel
64 * sets up their pages tables accordingly when they submit their
65 * command buffers and a VMID is assigned.
66 * The hardware supports up to 16 active GPUVMs at any given time.
67 *
68 * Each GPUVM is represented by a 1-2 or 1-5 level page table, depending
69 * on the ASIC family. GPUVM supports RWX attributes on each page as well
70 * as other features such as encryption and caching attributes.
71 *
72 * VMID 0 is special. It is the GPUVM used for the kernel driver. In
73 * addition to an aperture managed by a page table, VMID 0 also has
74 * several other apertures. There is an aperture for direct access to VRAM
75 * and there is a legacy AGP aperture which just forwards accesses directly
76 * to the matching system physical addresses (or IOVAs when an IOMMU is
77 * present). These apertures provide direct access to these memories without
78 * incurring the overhead of a page table. VMID 0 is used by the kernel
79 * driver for tasks like memory management.
80 *
81 * GPU clients (i.e., engines on the GPU) use GPUVM VMIDs to access memory.
82 * For user applications, each application can have their own unique GPUVM
83 * address space. The application manages the address space and the kernel
84 * driver manages the GPUVM page tables for each process. If an GPU client
85 * accesses an invalid page, it will generate a GPU page fault, similar to
86 * accessing an invalid page on a CPU.
87 */
88
89#define START(node) ((node)->start)
90#define LAST(node) ((node)->last)
91
92INTERVAL_TREE_DEFINE(struct amdgpu_bo_va_mapping, rb, uint64_t, __subtree_last,
93 START, LAST, static, amdgpu_vm_it)
94
95#undef START
96#undef LAST
97
98/**
99 * struct amdgpu_prt_cb - Helper to disable partial resident texture feature from a fence callback
100 */
101struct amdgpu_prt_cb {
102
103 /**
104 * @adev: amdgpu device
105 */
106 struct amdgpu_device *adev;
107
108 /**
109 * @cb: callback
110 */
111 struct dma_fence_cb cb;
112};
113
114/**
115 * struct amdgpu_vm_tlb_seq_struct - Helper to increment the TLB flush sequence
116 */
117struct amdgpu_vm_tlb_seq_struct {
118 /**
119 * @vm: pointer to the amdgpu_vm structure to set the fence sequence on
120 */
121 struct amdgpu_vm *vm;
122
123 /**
124 * @cb: callback
125 */
126 struct dma_fence_cb cb;
127};
128
129/**
130 * amdgpu_vm_set_pasid - manage pasid and vm ptr mapping
131 *
132 * @adev: amdgpu_device pointer
133 * @vm: amdgpu_vm pointer
134 * @pasid: the pasid the VM is using on this GPU
135 *
136 * Set the pasid this VM is using on this GPU, can also be used to remove the
137 * pasid by passing in zero.
138 *
139 */
140int amdgpu_vm_set_pasid(struct amdgpu_device *adev, struct amdgpu_vm *vm,
141 u32 pasid)
142{
143 int r;
144
145 if (vm->pasid == pasid)
146 return 0;
147
148 if (vm->pasid) {
149 r = xa_err(xa_erase_irq(&adev->vm_manager.pasids, vm->pasid));
150 if (r < 0)
151 return r;
152
153 vm->pasid = 0;
154 }
155
156 if (pasid) {
157 r = xa_err(xa_store_irq(&adev->vm_manager.pasids, pasid, vm,
158 GFP_KERNEL));
159 if (r < 0)
160 return r;
161
162 vm->pasid = pasid;
163 }
164
165
166 return 0;
167}
168
169/**
170 * amdgpu_vm_bo_evicted - vm_bo is evicted
171 *
172 * @vm_bo: vm_bo which is evicted
173 *
174 * State for PDs/PTs and per VM BOs which are not at the location they should
175 * be.
176 */
177static void amdgpu_vm_bo_evicted(struct amdgpu_vm_bo_base *vm_bo)
178{
179 struct amdgpu_vm *vm = vm_bo->vm;
180 struct amdgpu_bo *bo = vm_bo->bo;
181
182 vm_bo->moved = true;
183 spin_lock(&vm_bo->vm->status_lock);
184 if (bo->tbo.type == ttm_bo_type_kernel)
185 list_move(&vm_bo->vm_status, &vm->evicted);
186 else
187 list_move_tail(&vm_bo->vm_status, &vm->evicted);
188 spin_unlock(&vm_bo->vm->status_lock);
189}
190/**
191 * amdgpu_vm_bo_moved - vm_bo is moved
192 *
193 * @vm_bo: vm_bo which is moved
194 *
195 * State for per VM BOs which are moved, but that change is not yet reflected
196 * in the page tables.
197 */
198static void amdgpu_vm_bo_moved(struct amdgpu_vm_bo_base *vm_bo)
199{
200 spin_lock(&vm_bo->vm->status_lock);
201 list_move(&vm_bo->vm_status, &vm_bo->vm->moved);
202 spin_unlock(&vm_bo->vm->status_lock);
203}
204
205/**
206 * amdgpu_vm_bo_idle - vm_bo is idle
207 *
208 * @vm_bo: vm_bo which is now idle
209 *
210 * State for PDs/PTs and per VM BOs which have gone through the state machine
211 * and are now idle.
212 */
213static void amdgpu_vm_bo_idle(struct amdgpu_vm_bo_base *vm_bo)
214{
215 spin_lock(&vm_bo->vm->status_lock);
216 list_move(&vm_bo->vm_status, &vm_bo->vm->idle);
217 spin_unlock(&vm_bo->vm->status_lock);
218 vm_bo->moved = false;
219}
220
221/**
222 * amdgpu_vm_bo_invalidated - vm_bo is invalidated
223 *
224 * @vm_bo: vm_bo which is now invalidated
225 *
226 * State for normal BOs which are invalidated and that change not yet reflected
227 * in the PTs.
228 */
229static void amdgpu_vm_bo_invalidated(struct amdgpu_vm_bo_base *vm_bo)
230{
231 spin_lock(&vm_bo->vm->status_lock);
232 list_move(&vm_bo->vm_status, &vm_bo->vm->invalidated);
233 spin_unlock(&vm_bo->vm->status_lock);
234}
235
236/**
237 * amdgpu_vm_bo_evicted_user - vm_bo is evicted
238 *
239 * @vm_bo: vm_bo which is evicted
240 *
241 * State for BOs used by user mode queues which are not at the location they
242 * should be.
243 */
244static void amdgpu_vm_bo_evicted_user(struct amdgpu_vm_bo_base *vm_bo)
245{
246 vm_bo->moved = true;
247 spin_lock(&vm_bo->vm->status_lock);
248 list_move(&vm_bo->vm_status, &vm_bo->vm->evicted_user);
249 spin_unlock(&vm_bo->vm->status_lock);
250}
251
252/**
253 * amdgpu_vm_bo_relocated - vm_bo is reloacted
254 *
255 * @vm_bo: vm_bo which is relocated
256 *
257 * State for PDs/PTs which needs to update their parent PD.
258 * For the root PD, just move to idle state.
259 */
260static void amdgpu_vm_bo_relocated(struct amdgpu_vm_bo_base *vm_bo)
261{
262 if (vm_bo->bo->parent) {
263 spin_lock(&vm_bo->vm->status_lock);
264 list_move(&vm_bo->vm_status, &vm_bo->vm->relocated);
265 spin_unlock(&vm_bo->vm->status_lock);
266 } else {
267 amdgpu_vm_bo_idle(vm_bo);
268 }
269}
270
271/**
272 * amdgpu_vm_bo_done - vm_bo is done
273 *
274 * @vm_bo: vm_bo which is now done
275 *
276 * State for normal BOs which are invalidated and that change has been updated
277 * in the PTs.
278 */
279static void amdgpu_vm_bo_done(struct amdgpu_vm_bo_base *vm_bo)
280{
281 spin_lock(&vm_bo->vm->status_lock);
282 list_move(&vm_bo->vm_status, &vm_bo->vm->done);
283 spin_unlock(&vm_bo->vm->status_lock);
284}
285
286/**
287 * amdgpu_vm_bo_reset_state_machine - reset the vm_bo state machine
288 * @vm: the VM which state machine to reset
289 *
290 * Move all vm_bo object in the VM into a state where they will be updated
291 * again during validation.
292 */
293static void amdgpu_vm_bo_reset_state_machine(struct amdgpu_vm *vm)
294{
295 struct amdgpu_vm_bo_base *vm_bo, *tmp;
296
297 spin_lock(&vm->status_lock);
298 list_splice_init(&vm->done, &vm->invalidated);
299 list_for_each_entry(vm_bo, &vm->invalidated, vm_status)
300 vm_bo->moved = true;
301 list_for_each_entry_safe(vm_bo, tmp, &vm->idle, vm_status) {
302 struct amdgpu_bo *bo = vm_bo->bo;
303
304 vm_bo->moved = true;
305 if (!bo || bo->tbo.type != ttm_bo_type_kernel)
306 list_move(&vm_bo->vm_status, &vm_bo->vm->moved);
307 else if (bo->parent)
308 list_move(&vm_bo->vm_status, &vm_bo->vm->relocated);
309 }
310 spin_unlock(&vm->status_lock);
311}
312
313/**
314 * amdgpu_vm_bo_base_init - Adds bo to the list of bos associated with the vm
315 *
316 * @base: base structure for tracking BO usage in a VM
317 * @vm: vm to which bo is to be added
318 * @bo: amdgpu buffer object
319 *
320 * Initialize a bo_va_base structure and add it to the appropriate lists
321 *
322 */
323void amdgpu_vm_bo_base_init(struct amdgpu_vm_bo_base *base,
324 struct amdgpu_vm *vm, struct amdgpu_bo *bo)
325{
326 base->vm = vm;
327 base->bo = bo;
328 base->next = NULL;
329 INIT_LIST_HEAD(&base->vm_status);
330
331 if (!bo)
332 return;
333 base->next = bo->vm_bo;
334 bo->vm_bo = base;
335
336 if (bo->tbo.base.resv != vm->root.bo->tbo.base.resv)
337 return;
338
339 dma_resv_assert_held(vm->root.bo->tbo.base.resv);
340
341 ttm_bo_set_bulk_move(&bo->tbo, &vm->lru_bulk_move);
342 if (bo->tbo.type == ttm_bo_type_kernel && bo->parent)
343 amdgpu_vm_bo_relocated(base);
344 else
345 amdgpu_vm_bo_idle(base);
346
347 if (bo->preferred_domains &
348 amdgpu_mem_type_to_domain(bo->tbo.resource->mem_type))
349 return;
350
351 /*
352 * we checked all the prerequisites, but it looks like this per vm bo
353 * is currently evicted. add the bo to the evicted list to make sure it
354 * is validated on next vm use to avoid fault.
355 * */
356 amdgpu_vm_bo_evicted(base);
357}
358
359/**
360 * amdgpu_vm_lock_pd - lock PD in drm_exec
361 *
362 * @vm: vm providing the BOs
363 * @exec: drm execution context
364 * @num_fences: number of extra fences to reserve
365 *
366 * Lock the VM root PD in the DRM execution context.
367 */
368int amdgpu_vm_lock_pd(struct amdgpu_vm *vm, struct drm_exec *exec,
369 unsigned int num_fences)
370{
371 /* We need at least two fences for the VM PD/PT updates */
372 return drm_exec_prepare_obj(exec, &vm->root.bo->tbo.base,
373 2 + num_fences);
374}
375
376/**
377 * amdgpu_vm_move_to_lru_tail - move all BOs to the end of LRU
378 *
379 * @adev: amdgpu device pointer
380 * @vm: vm providing the BOs
381 *
382 * Move all BOs to the end of LRU and remember their positions to put them
383 * together.
384 */
385void amdgpu_vm_move_to_lru_tail(struct amdgpu_device *adev,
386 struct amdgpu_vm *vm)
387{
388 spin_lock(&adev->mman.bdev.lru_lock);
389 ttm_lru_bulk_move_tail(&vm->lru_bulk_move);
390 spin_unlock(&adev->mman.bdev.lru_lock);
391}
392
393/* Create scheduler entities for page table updates */
394static int amdgpu_vm_init_entities(struct amdgpu_device *adev,
395 struct amdgpu_vm *vm)
396{
397 int r;
398
399 r = drm_sched_entity_init(&vm->immediate, DRM_SCHED_PRIORITY_NORMAL,
400 adev->vm_manager.vm_pte_scheds,
401 adev->vm_manager.vm_pte_num_scheds, NULL);
402 if (r)
403 goto error;
404
405 return drm_sched_entity_init(&vm->delayed, DRM_SCHED_PRIORITY_NORMAL,
406 adev->vm_manager.vm_pte_scheds,
407 adev->vm_manager.vm_pte_num_scheds, NULL);
408
409error:
410 drm_sched_entity_destroy(&vm->immediate);
411 return r;
412}
413
414/* Destroy the entities for page table updates again */
415static void amdgpu_vm_fini_entities(struct amdgpu_vm *vm)
416{
417 drm_sched_entity_destroy(&vm->immediate);
418 drm_sched_entity_destroy(&vm->delayed);
419}
420
421/**
422 * amdgpu_vm_generation - return the page table re-generation counter
423 * @adev: the amdgpu_device
424 * @vm: optional VM to check, might be NULL
425 *
426 * Returns a page table re-generation token to allow checking if submissions
427 * are still valid to use this VM. The VM parameter might be NULL in which case
428 * just the VRAM lost counter will be used.
429 */
430uint64_t amdgpu_vm_generation(struct amdgpu_device *adev, struct amdgpu_vm *vm)
431{
432 uint64_t result = (u64)atomic_read(&adev->vram_lost_counter) << 32;
433
434 if (!vm)
435 return result;
436
437 result += vm->generation;
438 /* Add one if the page tables will be re-generated on next CS */
439 if (drm_sched_entity_error(&vm->delayed))
440 ++result;
441
442 return result;
443}
444
445/**
446 * amdgpu_vm_validate - validate evicted BOs tracked in the VM
447 *
448 * @adev: amdgpu device pointer
449 * @vm: vm providing the BOs
450 * @ticket: optional reservation ticket used to reserve the VM
451 * @validate: callback to do the validation
452 * @param: parameter for the validation callback
453 *
454 * Validate the page table BOs and per-VM BOs on command submission if
455 * necessary. If a ticket is given, also try to validate evicted user queue
456 * BOs. They must already be reserved with the given ticket.
457 *
458 * Returns:
459 * Validation result.
460 */
461int amdgpu_vm_validate(struct amdgpu_device *adev, struct amdgpu_vm *vm,
462 struct ww_acquire_ctx *ticket,
463 int (*validate)(void *p, struct amdgpu_bo *bo),
464 void *param)
465{
466 struct amdgpu_vm_bo_base *bo_base;
467 struct amdgpu_bo *shadow;
468 struct amdgpu_bo *bo;
469 int r;
470
471 if (drm_sched_entity_error(&vm->delayed)) {
472 ++vm->generation;
473 amdgpu_vm_bo_reset_state_machine(vm);
474 amdgpu_vm_fini_entities(vm);
475 r = amdgpu_vm_init_entities(adev, vm);
476 if (r)
477 return r;
478 }
479
480 spin_lock(&vm->status_lock);
481 while (!list_empty(&vm->evicted)) {
482 bo_base = list_first_entry(&vm->evicted,
483 struct amdgpu_vm_bo_base,
484 vm_status);
485 spin_unlock(&vm->status_lock);
486
487 bo = bo_base->bo;
488 shadow = amdgpu_bo_shadowed(bo);
489
490 r = validate(param, bo);
491 if (r)
492 return r;
493 if (shadow) {
494 r = validate(param, shadow);
495 if (r)
496 return r;
497 }
498
499 if (bo->tbo.type != ttm_bo_type_kernel) {
500 amdgpu_vm_bo_moved(bo_base);
501 } else {
502 vm->update_funcs->map_table(to_amdgpu_bo_vm(bo));
503 amdgpu_vm_bo_relocated(bo_base);
504 }
505 spin_lock(&vm->status_lock);
506 }
507 while (ticket && !list_empty(&vm->evicted_user)) {
508 bo_base = list_first_entry(&vm->evicted_user,
509 struct amdgpu_vm_bo_base,
510 vm_status);
511 spin_unlock(&vm->status_lock);
512
513 bo = bo_base->bo;
514
515 if (dma_resv_locking_ctx(bo->tbo.base.resv) != ticket) {
516 struct amdgpu_task_info *ti = amdgpu_vm_get_task_info_vm(vm);
517
518 pr_warn_ratelimited("Evicted user BO is not reserved\n");
519 if (ti) {
520 pr_warn_ratelimited("pid %d\n", ti->pid);
521 amdgpu_vm_put_task_info(ti);
522 }
523
524 return -EINVAL;
525 }
526
527 r = validate(param, bo);
528 if (r)
529 return r;
530
531 amdgpu_vm_bo_invalidated(bo_base);
532
533 spin_lock(&vm->status_lock);
534 }
535 spin_unlock(&vm->status_lock);
536
537 amdgpu_vm_eviction_lock(vm);
538 vm->evicting = false;
539 amdgpu_vm_eviction_unlock(vm);
540
541 return 0;
542}
543
544/**
545 * amdgpu_vm_ready - check VM is ready for updates
546 *
547 * @vm: VM to check
548 *
549 * Check if all VM PDs/PTs are ready for updates
550 *
551 * Returns:
552 * True if VM is not evicting.
553 */
554bool amdgpu_vm_ready(struct amdgpu_vm *vm)
555{
556 bool empty;
557 bool ret;
558
559 amdgpu_vm_eviction_lock(vm);
560 ret = !vm->evicting;
561 amdgpu_vm_eviction_unlock(vm);
562
563 spin_lock(&vm->status_lock);
564 empty = list_empty(&vm->evicted);
565 spin_unlock(&vm->status_lock);
566
567 return ret && empty;
568}
569
570/**
571 * amdgpu_vm_check_compute_bug - check whether asic has compute vm bug
572 *
573 * @adev: amdgpu_device pointer
574 */
575void amdgpu_vm_check_compute_bug(struct amdgpu_device *adev)
576{
577 const struct amdgpu_ip_block *ip_block;
578 bool has_compute_vm_bug;
579 struct amdgpu_ring *ring;
580 int i;
581
582 has_compute_vm_bug = false;
583
584 ip_block = amdgpu_device_ip_get_ip_block(adev, AMD_IP_BLOCK_TYPE_GFX);
585 if (ip_block) {
586 /* Compute has a VM bug for GFX version < 7.
587 Compute has a VM bug for GFX 8 MEC firmware version < 673.*/
588 if (ip_block->version->major <= 7)
589 has_compute_vm_bug = true;
590 else if (ip_block->version->major == 8)
591 if (adev->gfx.mec_fw_version < 673)
592 has_compute_vm_bug = true;
593 }
594
595 for (i = 0; i < adev->num_rings; i++) {
596 ring = adev->rings[i];
597 if (ring->funcs->type == AMDGPU_RING_TYPE_COMPUTE)
598 /* only compute rings */
599 ring->has_compute_vm_bug = has_compute_vm_bug;
600 else
601 ring->has_compute_vm_bug = false;
602 }
603}
604
605/**
606 * amdgpu_vm_need_pipeline_sync - Check if pipe sync is needed for job.
607 *
608 * @ring: ring on which the job will be submitted
609 * @job: job to submit
610 *
611 * Returns:
612 * True if sync is needed.
613 */
614bool amdgpu_vm_need_pipeline_sync(struct amdgpu_ring *ring,
615 struct amdgpu_job *job)
616{
617 struct amdgpu_device *adev = ring->adev;
618 unsigned vmhub = ring->vm_hub;
619 struct amdgpu_vmid_mgr *id_mgr = &adev->vm_manager.id_mgr[vmhub];
620
621 if (job->vmid == 0)
622 return false;
623
624 if (job->vm_needs_flush || ring->has_compute_vm_bug)
625 return true;
626
627 if (ring->funcs->emit_gds_switch && job->gds_switch_needed)
628 return true;
629
630 if (amdgpu_vmid_had_gpu_reset(adev, &id_mgr->ids[job->vmid]))
631 return true;
632
633 return false;
634}
635
636/**
637 * amdgpu_vm_flush - hardware flush the vm
638 *
639 * @ring: ring to use for flush
640 * @job: related job
641 * @need_pipe_sync: is pipe sync needed
642 *
643 * Emit a VM flush when it is necessary.
644 *
645 * Returns:
646 * 0 on success, errno otherwise.
647 */
648int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job,
649 bool need_pipe_sync)
650{
651 struct amdgpu_device *adev = ring->adev;
652 unsigned vmhub = ring->vm_hub;
653 struct amdgpu_vmid_mgr *id_mgr = &adev->vm_manager.id_mgr[vmhub];
654 struct amdgpu_vmid *id = &id_mgr->ids[job->vmid];
655 bool spm_update_needed = job->spm_update_needed;
656 bool gds_switch_needed = ring->funcs->emit_gds_switch &&
657 job->gds_switch_needed;
658 bool vm_flush_needed = job->vm_needs_flush;
659 struct dma_fence *fence = NULL;
660 bool pasid_mapping_needed = false;
661 unsigned int patch;
662 int r;
663
664 if (amdgpu_vmid_had_gpu_reset(adev, id)) {
665 gds_switch_needed = true;
666 vm_flush_needed = true;
667 pasid_mapping_needed = true;
668 spm_update_needed = true;
669 }
670
671 mutex_lock(&id_mgr->lock);
672 if (id->pasid != job->pasid || !id->pasid_mapping ||
673 !dma_fence_is_signaled(id->pasid_mapping))
674 pasid_mapping_needed = true;
675 mutex_unlock(&id_mgr->lock);
676
677 gds_switch_needed &= !!ring->funcs->emit_gds_switch;
678 vm_flush_needed &= !!ring->funcs->emit_vm_flush &&
679 job->vm_pd_addr != AMDGPU_BO_INVALID_OFFSET;
680 pasid_mapping_needed &= adev->gmc.gmc_funcs->emit_pasid_mapping &&
681 ring->funcs->emit_wreg;
682
683 if (!vm_flush_needed && !gds_switch_needed && !need_pipe_sync)
684 return 0;
685
686 amdgpu_ring_ib_begin(ring);
687 if (ring->funcs->init_cond_exec)
688 patch = amdgpu_ring_init_cond_exec(ring,
689 ring->cond_exe_gpu_addr);
690
691 if (need_pipe_sync)
692 amdgpu_ring_emit_pipeline_sync(ring);
693
694 if (vm_flush_needed) {
695 trace_amdgpu_vm_flush(ring, job->vmid, job->vm_pd_addr);
696 amdgpu_ring_emit_vm_flush(ring, job->vmid, job->vm_pd_addr);
697 }
698
699 if (pasid_mapping_needed)
700 amdgpu_gmc_emit_pasid_mapping(ring, job->vmid, job->pasid);
701
702 if (spm_update_needed && adev->gfx.rlc.funcs->update_spm_vmid)
703 adev->gfx.rlc.funcs->update_spm_vmid(adev, ring, job->vmid);
704
705 if (!ring->is_mes_queue && ring->funcs->emit_gds_switch &&
706 gds_switch_needed) {
707 amdgpu_ring_emit_gds_switch(ring, job->vmid, job->gds_base,
708 job->gds_size, job->gws_base,
709 job->gws_size, job->oa_base,
710 job->oa_size);
711 }
712
713 if (vm_flush_needed || pasid_mapping_needed) {
714 r = amdgpu_fence_emit(ring, &fence, NULL, 0);
715 if (r)
716 return r;
717 }
718
719 if (vm_flush_needed) {
720 mutex_lock(&id_mgr->lock);
721 dma_fence_put(id->last_flush);
722 id->last_flush = dma_fence_get(fence);
723 id->current_gpu_reset_count =
724 atomic_read(&adev->gpu_reset_counter);
725 mutex_unlock(&id_mgr->lock);
726 }
727
728 if (pasid_mapping_needed) {
729 mutex_lock(&id_mgr->lock);
730 id->pasid = job->pasid;
731 dma_fence_put(id->pasid_mapping);
732 id->pasid_mapping = dma_fence_get(fence);
733 mutex_unlock(&id_mgr->lock);
734 }
735 dma_fence_put(fence);
736
737 amdgpu_ring_patch_cond_exec(ring, patch);
738
739 /* the double SWITCH_BUFFER here *cannot* be skipped by COND_EXEC */
740 if (ring->funcs->emit_switch_buffer) {
741 amdgpu_ring_emit_switch_buffer(ring);
742 amdgpu_ring_emit_switch_buffer(ring);
743 }
744 amdgpu_ring_ib_end(ring);
745 return 0;
746}
747
748/**
749 * amdgpu_vm_bo_find - find the bo_va for a specific vm & bo
750 *
751 * @vm: requested vm
752 * @bo: requested buffer object
753 *
754 * Find @bo inside the requested vm.
755 * Search inside the @bos vm list for the requested vm
756 * Returns the found bo_va or NULL if none is found
757 *
758 * Object has to be reserved!
759 *
760 * Returns:
761 * Found bo_va or NULL.
762 */
763struct amdgpu_bo_va *amdgpu_vm_bo_find(struct amdgpu_vm *vm,
764 struct amdgpu_bo *bo)
765{
766 struct amdgpu_vm_bo_base *base;
767
768 for (base = bo->vm_bo; base; base = base->next) {
769 if (base->vm != vm)
770 continue;
771
772 return container_of(base, struct amdgpu_bo_va, base);
773 }
774 return NULL;
775}
776
777/**
778 * amdgpu_vm_map_gart - Resolve gart mapping of addr
779 *
780 * @pages_addr: optional DMA address to use for lookup
781 * @addr: the unmapped addr
782 *
783 * Look up the physical address of the page that the pte resolves
784 * to.
785 *
786 * Returns:
787 * The pointer for the page table entry.
788 */
789uint64_t amdgpu_vm_map_gart(const dma_addr_t *pages_addr, uint64_t addr)
790{
791 uint64_t result;
792
793 /* page table offset */
794 result = pages_addr[addr >> PAGE_SHIFT];
795
796 /* in case cpu page size != gpu page size*/
797 result |= addr & (~PAGE_MASK);
798
799 result &= 0xFFFFFFFFFFFFF000ULL;
800
801 return result;
802}
803
804/**
805 * amdgpu_vm_update_pdes - make sure that all directories are valid
806 *
807 * @adev: amdgpu_device pointer
808 * @vm: requested vm
809 * @immediate: submit immediately to the paging queue
810 *
811 * Makes sure all directories are up to date.
812 *
813 * Returns:
814 * 0 for success, error for failure.
815 */
816int amdgpu_vm_update_pdes(struct amdgpu_device *adev,
817 struct amdgpu_vm *vm, bool immediate)
818{
819 struct amdgpu_vm_update_params params;
820 struct amdgpu_vm_bo_base *entry;
821 bool flush_tlb_needed = false;
822 LIST_HEAD(relocated);
823 int r, idx;
824
825 spin_lock(&vm->status_lock);
826 list_splice_init(&vm->relocated, &relocated);
827 spin_unlock(&vm->status_lock);
828
829 if (list_empty(&relocated))
830 return 0;
831
832 if (!drm_dev_enter(adev_to_drm(adev), &idx))
833 return -ENODEV;
834
835 memset(¶ms, 0, sizeof(params));
836 params.adev = adev;
837 params.vm = vm;
838 params.immediate = immediate;
839
840 r = vm->update_funcs->prepare(¶ms, NULL, AMDGPU_SYNC_EXPLICIT);
841 if (r)
842 goto error;
843
844 list_for_each_entry(entry, &relocated, vm_status) {
845 /* vm_flush_needed after updating moved PDEs */
846 flush_tlb_needed |= entry->moved;
847
848 r = amdgpu_vm_pde_update(¶ms, entry);
849 if (r)
850 goto error;
851 }
852
853 r = vm->update_funcs->commit(¶ms, &vm->last_update);
854 if (r)
855 goto error;
856
857 if (flush_tlb_needed)
858 atomic64_inc(&vm->tlb_seq);
859
860 while (!list_empty(&relocated)) {
861 entry = list_first_entry(&relocated, struct amdgpu_vm_bo_base,
862 vm_status);
863 amdgpu_vm_bo_idle(entry);
864 }
865
866error:
867 drm_dev_exit(idx);
868 return r;
869}
870
871/**
872 * amdgpu_vm_tlb_seq_cb - make sure to increment tlb sequence
873 * @fence: unused
874 * @cb: the callback structure
875 *
876 * Increments the tlb sequence to make sure that future CS execute a VM flush.
877 */
878static void amdgpu_vm_tlb_seq_cb(struct dma_fence *fence,
879 struct dma_fence_cb *cb)
880{
881 struct amdgpu_vm_tlb_seq_struct *tlb_cb;
882
883 tlb_cb = container_of(cb, typeof(*tlb_cb), cb);
884 atomic64_inc(&tlb_cb->vm->tlb_seq);
885 kfree(tlb_cb);
886}
887
888/**
889 * amdgpu_vm_update_range - update a range in the vm page table
890 *
891 * @adev: amdgpu_device pointer to use for commands
892 * @vm: the VM to update the range
893 * @immediate: immediate submission in a page fault
894 * @unlocked: unlocked invalidation during MM callback
895 * @flush_tlb: trigger tlb invalidation after update completed
896 * @allow_override: change MTYPE for local NUMA nodes
897 * @resv: fences we need to sync to
898 * @start: start of mapped range
899 * @last: last mapped entry
900 * @flags: flags for the entries
901 * @offset: offset into nodes and pages_addr
902 * @vram_base: base for vram mappings
903 * @res: ttm_resource to map
904 * @pages_addr: DMA addresses to use for mapping
905 * @fence: optional resulting fence
906 *
907 * Fill in the page table entries between @start and @last.
908 *
909 * Returns:
910 * 0 for success, negative erro code for failure.
911 */
912int amdgpu_vm_update_range(struct amdgpu_device *adev, struct amdgpu_vm *vm,
913 bool immediate, bool unlocked, bool flush_tlb, bool allow_override,
914 struct dma_resv *resv, uint64_t start, uint64_t last,
915 uint64_t flags, uint64_t offset, uint64_t vram_base,
916 struct ttm_resource *res, dma_addr_t *pages_addr,
917 struct dma_fence **fence)
918{
919 struct amdgpu_vm_update_params params;
920 struct amdgpu_vm_tlb_seq_struct *tlb_cb;
921 struct amdgpu_res_cursor cursor;
922 enum amdgpu_sync_mode sync_mode;
923 int r, idx;
924
925 if (!drm_dev_enter(adev_to_drm(adev), &idx))
926 return -ENODEV;
927
928 tlb_cb = kmalloc(sizeof(*tlb_cb), GFP_KERNEL);
929 if (!tlb_cb) {
930 r = -ENOMEM;
931 goto error_unlock;
932 }
933
934 /* Vega20+XGMI where PTEs get inadvertently cached in L2 texture cache,
935 * heavy-weight flush TLB unconditionally.
936 */
937 flush_tlb |= adev->gmc.xgmi.num_physical_nodes &&
938 amdgpu_ip_version(adev, GC_HWIP, 0) == IP_VERSION(9, 4, 0);
939
940 /*
941 * On GFX8 and older any 8 PTE block with a valid bit set enters the TLB
942 */
943 flush_tlb |= amdgpu_ip_version(adev, GC_HWIP, 0) < IP_VERSION(9, 0, 0);
944
945 memset(¶ms, 0, sizeof(params));
946 params.adev = adev;
947 params.vm = vm;
948 params.immediate = immediate;
949 params.pages_addr = pages_addr;
950 params.unlocked = unlocked;
951 params.allow_override = allow_override;
952
953 /* Implicitly sync to command submissions in the same VM before
954 * unmapping. Sync to moving fences before mapping.
955 */
956 if (!(flags & AMDGPU_PTE_VALID))
957 sync_mode = AMDGPU_SYNC_EQ_OWNER;
958 else
959 sync_mode = AMDGPU_SYNC_EXPLICIT;
960
961 amdgpu_vm_eviction_lock(vm);
962 if (vm->evicting) {
963 r = -EBUSY;
964 goto error_free;
965 }
966
967 if (!unlocked && !dma_fence_is_signaled(vm->last_unlocked)) {
968 struct dma_fence *tmp = dma_fence_get_stub();
969
970 amdgpu_bo_fence(vm->root.bo, vm->last_unlocked, true);
971 swap(vm->last_unlocked, tmp);
972 dma_fence_put(tmp);
973 }
974
975 r = vm->update_funcs->prepare(¶ms, resv, sync_mode);
976 if (r)
977 goto error_free;
978
979 amdgpu_res_first(pages_addr ? NULL : res, offset,
980 (last - start + 1) * AMDGPU_GPU_PAGE_SIZE, &cursor);
981 while (cursor.remaining) {
982 uint64_t tmp, num_entries, addr;
983
984 num_entries = cursor.size >> AMDGPU_GPU_PAGE_SHIFT;
985 if (pages_addr) {
986 bool contiguous = true;
987
988 if (num_entries > AMDGPU_GPU_PAGES_IN_CPU_PAGE) {
989 uint64_t pfn = cursor.start >> PAGE_SHIFT;
990 uint64_t count;
991
992 contiguous = pages_addr[pfn + 1] ==
993 pages_addr[pfn] + PAGE_SIZE;
994
995 tmp = num_entries /
996 AMDGPU_GPU_PAGES_IN_CPU_PAGE;
997 for (count = 2; count < tmp; ++count) {
998 uint64_t idx = pfn + count;
999
1000 if (contiguous != (pages_addr[idx] ==
1001 pages_addr[idx - 1] + PAGE_SIZE))
1002 break;
1003 }
1004 if (!contiguous)
1005 count--;
1006 num_entries = count *
1007 AMDGPU_GPU_PAGES_IN_CPU_PAGE;
1008 }
1009
1010 if (!contiguous) {
1011 addr = cursor.start;
1012 params.pages_addr = pages_addr;
1013 } else {
1014 addr = pages_addr[cursor.start >> PAGE_SHIFT];
1015 params.pages_addr = NULL;
1016 }
1017
1018 } else if (flags & (AMDGPU_PTE_VALID | AMDGPU_PTE_PRT)) {
1019 addr = vram_base + cursor.start;
1020 } else {
1021 addr = 0;
1022 }
1023
1024 tmp = start + num_entries;
1025 r = amdgpu_vm_ptes_update(¶ms, start, tmp, addr, flags);
1026 if (r)
1027 goto error_free;
1028
1029 amdgpu_res_next(&cursor, num_entries * AMDGPU_GPU_PAGE_SIZE);
1030 start = tmp;
1031 }
1032
1033 r = vm->update_funcs->commit(¶ms, fence);
1034
1035 if (flush_tlb || params.table_freed) {
1036 tlb_cb->vm = vm;
1037 if (fence && *fence &&
1038 !dma_fence_add_callback(*fence, &tlb_cb->cb,
1039 amdgpu_vm_tlb_seq_cb)) {
1040 dma_fence_put(vm->last_tlb_flush);
1041 vm->last_tlb_flush = dma_fence_get(*fence);
1042 } else {
1043 amdgpu_vm_tlb_seq_cb(NULL, &tlb_cb->cb);
1044 }
1045 tlb_cb = NULL;
1046 }
1047
1048error_free:
1049 kfree(tlb_cb);
1050
1051error_unlock:
1052 amdgpu_vm_eviction_unlock(vm);
1053 drm_dev_exit(idx);
1054 return r;
1055}
1056
1057static void amdgpu_vm_bo_get_memory(struct amdgpu_bo_va *bo_va,
1058 struct amdgpu_mem_stats *stats)
1059{
1060 struct amdgpu_vm *vm = bo_va->base.vm;
1061 struct amdgpu_bo *bo = bo_va->base.bo;
1062
1063 if (!bo)
1064 return;
1065
1066 /*
1067 * For now ignore BOs which are currently locked and potentially
1068 * changing their location.
1069 */
1070 if (bo->tbo.base.resv != vm->root.bo->tbo.base.resv &&
1071 !dma_resv_trylock(bo->tbo.base.resv))
1072 return;
1073
1074 amdgpu_bo_get_memory(bo, stats);
1075 if (bo->tbo.base.resv != vm->root.bo->tbo.base.resv)
1076 dma_resv_unlock(bo->tbo.base.resv);
1077}
1078
1079void amdgpu_vm_get_memory(struct amdgpu_vm *vm,
1080 struct amdgpu_mem_stats *stats)
1081{
1082 struct amdgpu_bo_va *bo_va, *tmp;
1083
1084 spin_lock(&vm->status_lock);
1085 list_for_each_entry_safe(bo_va, tmp, &vm->idle, base.vm_status)
1086 amdgpu_vm_bo_get_memory(bo_va, stats);
1087
1088 list_for_each_entry_safe(bo_va, tmp, &vm->evicted, base.vm_status)
1089 amdgpu_vm_bo_get_memory(bo_va, stats);
1090
1091 list_for_each_entry_safe(bo_va, tmp, &vm->relocated, base.vm_status)
1092 amdgpu_vm_bo_get_memory(bo_va, stats);
1093
1094 list_for_each_entry_safe(bo_va, tmp, &vm->moved, base.vm_status)
1095 amdgpu_vm_bo_get_memory(bo_va, stats);
1096
1097 list_for_each_entry_safe(bo_va, tmp, &vm->invalidated, base.vm_status)
1098 amdgpu_vm_bo_get_memory(bo_va, stats);
1099
1100 list_for_each_entry_safe(bo_va, tmp, &vm->done, base.vm_status)
1101 amdgpu_vm_bo_get_memory(bo_va, stats);
1102 spin_unlock(&vm->status_lock);
1103}
1104
1105/**
1106 * amdgpu_vm_bo_update - update all BO mappings in the vm page table
1107 *
1108 * @adev: amdgpu_device pointer
1109 * @bo_va: requested BO and VM object
1110 * @clear: if true clear the entries
1111 *
1112 * Fill in the page table entries for @bo_va.
1113 *
1114 * Returns:
1115 * 0 for success, -EINVAL for failure.
1116 */
1117int amdgpu_vm_bo_update(struct amdgpu_device *adev, struct amdgpu_bo_va *bo_va,
1118 bool clear)
1119{
1120 struct amdgpu_bo *bo = bo_va->base.bo;
1121 struct amdgpu_vm *vm = bo_va->base.vm;
1122 struct amdgpu_bo_va_mapping *mapping;
1123 dma_addr_t *pages_addr = NULL;
1124 struct ttm_resource *mem;
1125 struct dma_fence **last_update;
1126 bool flush_tlb = clear;
1127 bool uncached;
1128 struct dma_resv *resv;
1129 uint64_t vram_base;
1130 uint64_t flags;
1131 int r;
1132
1133 if (clear || !bo) {
1134 mem = NULL;
1135 resv = vm->root.bo->tbo.base.resv;
1136 } else {
1137 struct drm_gem_object *obj = &bo->tbo.base;
1138
1139 resv = bo->tbo.base.resv;
1140 if (obj->import_attach && bo_va->is_xgmi) {
1141 struct dma_buf *dma_buf = obj->import_attach->dmabuf;
1142 struct drm_gem_object *gobj = dma_buf->priv;
1143 struct amdgpu_bo *abo = gem_to_amdgpu_bo(gobj);
1144
1145 if (abo->tbo.resource &&
1146 abo->tbo.resource->mem_type == TTM_PL_VRAM)
1147 bo = gem_to_amdgpu_bo(gobj);
1148 }
1149 mem = bo->tbo.resource;
1150 if (mem && (mem->mem_type == TTM_PL_TT ||
1151 mem->mem_type == AMDGPU_PL_PREEMPT))
1152 pages_addr = bo->tbo.ttm->dma_address;
1153 }
1154
1155 if (bo) {
1156 struct amdgpu_device *bo_adev;
1157
1158 flags = amdgpu_ttm_tt_pte_flags(adev, bo->tbo.ttm, mem);
1159
1160 if (amdgpu_bo_encrypted(bo))
1161 flags |= AMDGPU_PTE_TMZ;
1162
1163 bo_adev = amdgpu_ttm_adev(bo->tbo.bdev);
1164 vram_base = bo_adev->vm_manager.vram_base_offset;
1165 uncached = (bo->flags & AMDGPU_GEM_CREATE_UNCACHED) != 0;
1166 } else {
1167 flags = 0x0;
1168 vram_base = 0;
1169 uncached = false;
1170 }
1171
1172 if (clear || (bo && bo->tbo.base.resv ==
1173 vm->root.bo->tbo.base.resv))
1174 last_update = &vm->last_update;
1175 else
1176 last_update = &bo_va->last_pt_update;
1177
1178 if (!clear && bo_va->base.moved) {
1179 flush_tlb = true;
1180 list_splice_init(&bo_va->valids, &bo_va->invalids);
1181
1182 } else if (bo_va->cleared != clear) {
1183 list_splice_init(&bo_va->valids, &bo_va->invalids);
1184 }
1185
1186 list_for_each_entry(mapping, &bo_va->invalids, list) {
1187 uint64_t update_flags = flags;
1188
1189 /* normally,bo_va->flags only contians READABLE and WIRTEABLE bit go here
1190 * but in case of something, we filter the flags in first place
1191 */
1192 if (!(mapping->flags & AMDGPU_PTE_READABLE))
1193 update_flags &= ~AMDGPU_PTE_READABLE;
1194 if (!(mapping->flags & AMDGPU_PTE_WRITEABLE))
1195 update_flags &= ~AMDGPU_PTE_WRITEABLE;
1196
1197 /* Apply ASIC specific mapping flags */
1198 amdgpu_gmc_get_vm_pte(adev, mapping, &update_flags);
1199
1200 trace_amdgpu_vm_bo_update(mapping);
1201
1202 r = amdgpu_vm_update_range(adev, vm, false, false, flush_tlb,
1203 !uncached, resv, mapping->start, mapping->last,
1204 update_flags, mapping->offset,
1205 vram_base, mem, pages_addr,
1206 last_update);
1207 if (r)
1208 return r;
1209 }
1210
1211 /* If the BO is not in its preferred location add it back to
1212 * the evicted list so that it gets validated again on the
1213 * next command submission.
1214 */
1215 if (bo && bo->tbo.base.resv == vm->root.bo->tbo.base.resv) {
1216 uint32_t mem_type = bo->tbo.resource->mem_type;
1217
1218 if (!(bo->preferred_domains &
1219 amdgpu_mem_type_to_domain(mem_type)))
1220 amdgpu_vm_bo_evicted(&bo_va->base);
1221 else
1222 amdgpu_vm_bo_idle(&bo_va->base);
1223 } else {
1224 amdgpu_vm_bo_done(&bo_va->base);
1225 }
1226
1227 list_splice_init(&bo_va->invalids, &bo_va->valids);
1228 bo_va->cleared = clear;
1229 bo_va->base.moved = false;
1230
1231 if (trace_amdgpu_vm_bo_mapping_enabled()) {
1232 list_for_each_entry(mapping, &bo_va->valids, list)
1233 trace_amdgpu_vm_bo_mapping(mapping);
1234 }
1235
1236 return 0;
1237}
1238
1239/**
1240 * amdgpu_vm_update_prt_state - update the global PRT state
1241 *
1242 * @adev: amdgpu_device pointer
1243 */
1244static void amdgpu_vm_update_prt_state(struct amdgpu_device *adev)
1245{
1246 unsigned long flags;
1247 bool enable;
1248
1249 spin_lock_irqsave(&adev->vm_manager.prt_lock, flags);
1250 enable = !!atomic_read(&adev->vm_manager.num_prt_users);
1251 adev->gmc.gmc_funcs->set_prt(adev, enable);
1252 spin_unlock_irqrestore(&adev->vm_manager.prt_lock, flags);
1253}
1254
1255/**
1256 * amdgpu_vm_prt_get - add a PRT user
1257 *
1258 * @adev: amdgpu_device pointer
1259 */
1260static void amdgpu_vm_prt_get(struct amdgpu_device *adev)
1261{
1262 if (!adev->gmc.gmc_funcs->set_prt)
1263 return;
1264
1265 if (atomic_inc_return(&adev->vm_manager.num_prt_users) == 1)
1266 amdgpu_vm_update_prt_state(adev);
1267}
1268
1269/**
1270 * amdgpu_vm_prt_put - drop a PRT user
1271 *
1272 * @adev: amdgpu_device pointer
1273 */
1274static void amdgpu_vm_prt_put(struct amdgpu_device *adev)
1275{
1276 if (atomic_dec_return(&adev->vm_manager.num_prt_users) == 0)
1277 amdgpu_vm_update_prt_state(adev);
1278}
1279
1280/**
1281 * amdgpu_vm_prt_cb - callback for updating the PRT status
1282 *
1283 * @fence: fence for the callback
1284 * @_cb: the callback function
1285 */
1286static void amdgpu_vm_prt_cb(struct dma_fence *fence, struct dma_fence_cb *_cb)
1287{
1288 struct amdgpu_prt_cb *cb = container_of(_cb, struct amdgpu_prt_cb, cb);
1289
1290 amdgpu_vm_prt_put(cb->adev);
1291 kfree(cb);
1292}
1293
1294/**
1295 * amdgpu_vm_add_prt_cb - add callback for updating the PRT status
1296 *
1297 * @adev: amdgpu_device pointer
1298 * @fence: fence for the callback
1299 */
1300static void amdgpu_vm_add_prt_cb(struct amdgpu_device *adev,
1301 struct dma_fence *fence)
1302{
1303 struct amdgpu_prt_cb *cb;
1304
1305 if (!adev->gmc.gmc_funcs->set_prt)
1306 return;
1307
1308 cb = kmalloc(sizeof(struct amdgpu_prt_cb), GFP_KERNEL);
1309 if (!cb) {
1310 /* Last resort when we are OOM */
1311 if (fence)
1312 dma_fence_wait(fence, false);
1313
1314 amdgpu_vm_prt_put(adev);
1315 } else {
1316 cb->adev = adev;
1317 if (!fence || dma_fence_add_callback(fence, &cb->cb,
1318 amdgpu_vm_prt_cb))
1319 amdgpu_vm_prt_cb(fence, &cb->cb);
1320 }
1321}
1322
1323/**
1324 * amdgpu_vm_free_mapping - free a mapping
1325 *
1326 * @adev: amdgpu_device pointer
1327 * @vm: requested vm
1328 * @mapping: mapping to be freed
1329 * @fence: fence of the unmap operation
1330 *
1331 * Free a mapping and make sure we decrease the PRT usage count if applicable.
1332 */
1333static void amdgpu_vm_free_mapping(struct amdgpu_device *adev,
1334 struct amdgpu_vm *vm,
1335 struct amdgpu_bo_va_mapping *mapping,
1336 struct dma_fence *fence)
1337{
1338 if (mapping->flags & AMDGPU_PTE_PRT)
1339 amdgpu_vm_add_prt_cb(adev, fence);
1340 kfree(mapping);
1341}
1342
1343/**
1344 * amdgpu_vm_prt_fini - finish all prt mappings
1345 *
1346 * @adev: amdgpu_device pointer
1347 * @vm: requested vm
1348 *
1349 * Register a cleanup callback to disable PRT support after VM dies.
1350 */
1351static void amdgpu_vm_prt_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm)
1352{
1353 struct dma_resv *resv = vm->root.bo->tbo.base.resv;
1354 struct dma_resv_iter cursor;
1355 struct dma_fence *fence;
1356
1357 dma_resv_for_each_fence(&cursor, resv, DMA_RESV_USAGE_BOOKKEEP, fence) {
1358 /* Add a callback for each fence in the reservation object */
1359 amdgpu_vm_prt_get(adev);
1360 amdgpu_vm_add_prt_cb(adev, fence);
1361 }
1362}
1363
1364/**
1365 * amdgpu_vm_clear_freed - clear freed BOs in the PT
1366 *
1367 * @adev: amdgpu_device pointer
1368 * @vm: requested vm
1369 * @fence: optional resulting fence (unchanged if no work needed to be done
1370 * or if an error occurred)
1371 *
1372 * Make sure all freed BOs are cleared in the PT.
1373 * PTs have to be reserved and mutex must be locked!
1374 *
1375 * Returns:
1376 * 0 for success.
1377 *
1378 */
1379int amdgpu_vm_clear_freed(struct amdgpu_device *adev,
1380 struct amdgpu_vm *vm,
1381 struct dma_fence **fence)
1382{
1383 struct dma_resv *resv = vm->root.bo->tbo.base.resv;
1384 struct amdgpu_bo_va_mapping *mapping;
1385 uint64_t init_pte_value = 0;
1386 struct dma_fence *f = NULL;
1387 int r;
1388
1389 while (!list_empty(&vm->freed)) {
1390 mapping = list_first_entry(&vm->freed,
1391 struct amdgpu_bo_va_mapping, list);
1392 list_del(&mapping->list);
1393
1394 r = amdgpu_vm_update_range(adev, vm, false, false, true, false,
1395 resv, mapping->start, mapping->last,
1396 init_pte_value, 0, 0, NULL, NULL,
1397 &f);
1398 amdgpu_vm_free_mapping(adev, vm, mapping, f);
1399 if (r) {
1400 dma_fence_put(f);
1401 return r;
1402 }
1403 }
1404
1405 if (fence && f) {
1406 dma_fence_put(*fence);
1407 *fence = f;
1408 } else {
1409 dma_fence_put(f);
1410 }
1411
1412 return 0;
1413
1414}
1415
1416/**
1417 * amdgpu_vm_handle_moved - handle moved BOs in the PT
1418 *
1419 * @adev: amdgpu_device pointer
1420 * @vm: requested vm
1421 * @ticket: optional reservation ticket used to reserve the VM
1422 *
1423 * Make sure all BOs which are moved are updated in the PTs.
1424 *
1425 * Returns:
1426 * 0 for success.
1427 *
1428 * PTs have to be reserved!
1429 */
1430int amdgpu_vm_handle_moved(struct amdgpu_device *adev,
1431 struct amdgpu_vm *vm,
1432 struct ww_acquire_ctx *ticket)
1433{
1434 struct amdgpu_bo_va *bo_va;
1435 struct dma_resv *resv;
1436 bool clear, unlock;
1437 int r;
1438
1439 spin_lock(&vm->status_lock);
1440 while (!list_empty(&vm->moved)) {
1441 bo_va = list_first_entry(&vm->moved, struct amdgpu_bo_va,
1442 base.vm_status);
1443 spin_unlock(&vm->status_lock);
1444
1445 /* Per VM BOs never need to bo cleared in the page tables */
1446 r = amdgpu_vm_bo_update(adev, bo_va, false);
1447 if (r)
1448 return r;
1449 spin_lock(&vm->status_lock);
1450 }
1451
1452 while (!list_empty(&vm->invalidated)) {
1453 bo_va = list_first_entry(&vm->invalidated, struct amdgpu_bo_va,
1454 base.vm_status);
1455 resv = bo_va->base.bo->tbo.base.resv;
1456 spin_unlock(&vm->status_lock);
1457
1458 /* Try to reserve the BO to avoid clearing its ptes */
1459 if (!adev->debug_vm && dma_resv_trylock(resv)) {
1460 clear = false;
1461 unlock = true;
1462 /* The caller is already holding the reservation lock */
1463 } else if (ticket && dma_resv_locking_ctx(resv) == ticket) {
1464 clear = false;
1465 unlock = false;
1466 /* Somebody else is using the BO right now */
1467 } else {
1468 clear = true;
1469 unlock = false;
1470 }
1471
1472 r = amdgpu_vm_bo_update(adev, bo_va, clear);
1473
1474 if (unlock)
1475 dma_resv_unlock(resv);
1476 if (r)
1477 return r;
1478
1479 /* Remember evicted DMABuf imports in compute VMs for later
1480 * validation
1481 */
1482 if (vm->is_compute_context &&
1483 bo_va->base.bo->tbo.base.import_attach &&
1484 (!bo_va->base.bo->tbo.resource ||
1485 bo_va->base.bo->tbo.resource->mem_type == TTM_PL_SYSTEM))
1486 amdgpu_vm_bo_evicted_user(&bo_va->base);
1487
1488 spin_lock(&vm->status_lock);
1489 }
1490 spin_unlock(&vm->status_lock);
1491
1492 return 0;
1493}
1494
1495/**
1496 * amdgpu_vm_flush_compute_tlb - Flush TLB on compute VM
1497 *
1498 * @adev: amdgpu_device pointer
1499 * @vm: requested vm
1500 * @flush_type: flush type
1501 * @xcc_mask: mask of XCCs that belong to the compute partition in need of a TLB flush.
1502 *
1503 * Flush TLB if needed for a compute VM.
1504 *
1505 * Returns:
1506 * 0 for success.
1507 */
1508int amdgpu_vm_flush_compute_tlb(struct amdgpu_device *adev,
1509 struct amdgpu_vm *vm,
1510 uint32_t flush_type,
1511 uint32_t xcc_mask)
1512{
1513 uint64_t tlb_seq = amdgpu_vm_tlb_seq(vm);
1514 bool all_hub = false;
1515 int xcc = 0, r = 0;
1516
1517 WARN_ON_ONCE(!vm->is_compute_context);
1518
1519 /*
1520 * It can be that we race and lose here, but that is extremely unlikely
1521 * and the worst thing which could happen is that we flush the changes
1522 * into the TLB once more which is harmless.
1523 */
1524 if (atomic64_xchg(&vm->kfd_last_flushed_seq, tlb_seq) == tlb_seq)
1525 return 0;
1526
1527 if (adev->family == AMDGPU_FAMILY_AI ||
1528 adev->family == AMDGPU_FAMILY_RV)
1529 all_hub = true;
1530
1531 for_each_inst(xcc, xcc_mask) {
1532 r = amdgpu_gmc_flush_gpu_tlb_pasid(adev, vm->pasid, flush_type,
1533 all_hub, xcc);
1534 if (r)
1535 break;
1536 }
1537 return r;
1538}
1539
1540/**
1541 * amdgpu_vm_bo_add - add a bo to a specific vm
1542 *
1543 * @adev: amdgpu_device pointer
1544 * @vm: requested vm
1545 * @bo: amdgpu buffer object
1546 *
1547 * Add @bo into the requested vm.
1548 * Add @bo to the list of bos associated with the vm
1549 *
1550 * Returns:
1551 * Newly added bo_va or NULL for failure
1552 *
1553 * Object has to be reserved!
1554 */
1555struct amdgpu_bo_va *amdgpu_vm_bo_add(struct amdgpu_device *adev,
1556 struct amdgpu_vm *vm,
1557 struct amdgpu_bo *bo)
1558{
1559 struct amdgpu_bo_va *bo_va;
1560
1561 bo_va = kzalloc(sizeof(struct amdgpu_bo_va), GFP_KERNEL);
1562 if (bo_va == NULL) {
1563 return NULL;
1564 }
1565 amdgpu_vm_bo_base_init(&bo_va->base, vm, bo);
1566
1567 bo_va->ref_count = 1;
1568 bo_va->last_pt_update = dma_fence_get_stub();
1569 INIT_LIST_HEAD(&bo_va->valids);
1570 INIT_LIST_HEAD(&bo_va->invalids);
1571
1572 if (!bo)
1573 return bo_va;
1574
1575 dma_resv_assert_held(bo->tbo.base.resv);
1576 if (amdgpu_dmabuf_is_xgmi_accessible(adev, bo)) {
1577 bo_va->is_xgmi = true;
1578 /* Power up XGMI if it can be potentially used */
1579 amdgpu_xgmi_set_pstate(adev, AMDGPU_XGMI_PSTATE_MAX_VEGA20);
1580 }
1581
1582 return bo_va;
1583}
1584
1585
1586/**
1587 * amdgpu_vm_bo_insert_map - insert a new mapping
1588 *
1589 * @adev: amdgpu_device pointer
1590 * @bo_va: bo_va to store the address
1591 * @mapping: the mapping to insert
1592 *
1593 * Insert a new mapping into all structures.
1594 */
1595static void amdgpu_vm_bo_insert_map(struct amdgpu_device *adev,
1596 struct amdgpu_bo_va *bo_va,
1597 struct amdgpu_bo_va_mapping *mapping)
1598{
1599 struct amdgpu_vm *vm = bo_va->base.vm;
1600 struct amdgpu_bo *bo = bo_va->base.bo;
1601
1602 mapping->bo_va = bo_va;
1603 list_add(&mapping->list, &bo_va->invalids);
1604 amdgpu_vm_it_insert(mapping, &vm->va);
1605
1606 if (mapping->flags & AMDGPU_PTE_PRT)
1607 amdgpu_vm_prt_get(adev);
1608
1609 if (bo && bo->tbo.base.resv == vm->root.bo->tbo.base.resv &&
1610 !bo_va->base.moved) {
1611 amdgpu_vm_bo_moved(&bo_va->base);
1612 }
1613 trace_amdgpu_vm_bo_map(bo_va, mapping);
1614}
1615
1616/* Validate operation parameters to prevent potential abuse */
1617static int amdgpu_vm_verify_parameters(struct amdgpu_device *adev,
1618 struct amdgpu_bo *bo,
1619 uint64_t saddr,
1620 uint64_t offset,
1621 uint64_t size)
1622{
1623 uint64_t tmp, lpfn;
1624
1625 if (saddr & AMDGPU_GPU_PAGE_MASK
1626 || offset & AMDGPU_GPU_PAGE_MASK
1627 || size & AMDGPU_GPU_PAGE_MASK)
1628 return -EINVAL;
1629
1630 if (check_add_overflow(saddr, size, &tmp)
1631 || check_add_overflow(offset, size, &tmp)
1632 || size == 0 /* which also leads to end < begin */)
1633 return -EINVAL;
1634
1635 /* make sure object fit at this offset */
1636 if (bo && offset + size > amdgpu_bo_size(bo))
1637 return -EINVAL;
1638
1639 /* Ensure last pfn not exceed max_pfn */
1640 lpfn = (saddr + size - 1) >> AMDGPU_GPU_PAGE_SHIFT;
1641 if (lpfn >= adev->vm_manager.max_pfn)
1642 return -EINVAL;
1643
1644 return 0;
1645}
1646
1647/**
1648 * amdgpu_vm_bo_map - map bo inside a vm
1649 *
1650 * @adev: amdgpu_device pointer
1651 * @bo_va: bo_va to store the address
1652 * @saddr: where to map the BO
1653 * @offset: requested offset in the BO
1654 * @size: BO size in bytes
1655 * @flags: attributes of pages (read/write/valid/etc.)
1656 *
1657 * Add a mapping of the BO at the specefied addr into the VM.
1658 *
1659 * Returns:
1660 * 0 for success, error for failure.
1661 *
1662 * Object has to be reserved and unreserved outside!
1663 */
1664int amdgpu_vm_bo_map(struct amdgpu_device *adev,
1665 struct amdgpu_bo_va *bo_va,
1666 uint64_t saddr, uint64_t offset,
1667 uint64_t size, uint64_t flags)
1668{
1669 struct amdgpu_bo_va_mapping *mapping, *tmp;
1670 struct amdgpu_bo *bo = bo_va->base.bo;
1671 struct amdgpu_vm *vm = bo_va->base.vm;
1672 uint64_t eaddr;
1673 int r;
1674
1675 r = amdgpu_vm_verify_parameters(adev, bo, saddr, offset, size);
1676 if (r)
1677 return r;
1678
1679 saddr /= AMDGPU_GPU_PAGE_SIZE;
1680 eaddr = saddr + (size - 1) / AMDGPU_GPU_PAGE_SIZE;
1681
1682 tmp = amdgpu_vm_it_iter_first(&vm->va, saddr, eaddr);
1683 if (tmp) {
1684 /* bo and tmp overlap, invalid addr */
1685 dev_err(adev->dev, "bo %p va 0x%010Lx-0x%010Lx conflict with "
1686 "0x%010Lx-0x%010Lx\n", bo, saddr, eaddr,
1687 tmp->start, tmp->last + 1);
1688 return -EINVAL;
1689 }
1690
1691 mapping = kmalloc(sizeof(*mapping), GFP_KERNEL);
1692 if (!mapping)
1693 return -ENOMEM;
1694
1695 mapping->start = saddr;
1696 mapping->last = eaddr;
1697 mapping->offset = offset;
1698 mapping->flags = flags;
1699
1700 amdgpu_vm_bo_insert_map(adev, bo_va, mapping);
1701
1702 return 0;
1703}
1704
1705/**
1706 * amdgpu_vm_bo_replace_map - map bo inside a vm, replacing existing mappings
1707 *
1708 * @adev: amdgpu_device pointer
1709 * @bo_va: bo_va to store the address
1710 * @saddr: where to map the BO
1711 * @offset: requested offset in the BO
1712 * @size: BO size in bytes
1713 * @flags: attributes of pages (read/write/valid/etc.)
1714 *
1715 * Add a mapping of the BO at the specefied addr into the VM. Replace existing
1716 * mappings as we do so.
1717 *
1718 * Returns:
1719 * 0 for success, error for failure.
1720 *
1721 * Object has to be reserved and unreserved outside!
1722 */
1723int amdgpu_vm_bo_replace_map(struct amdgpu_device *adev,
1724 struct amdgpu_bo_va *bo_va,
1725 uint64_t saddr, uint64_t offset,
1726 uint64_t size, uint64_t flags)
1727{
1728 struct amdgpu_bo_va_mapping *mapping;
1729 struct amdgpu_bo *bo = bo_va->base.bo;
1730 uint64_t eaddr;
1731 int r;
1732
1733 r = amdgpu_vm_verify_parameters(adev, bo, saddr, offset, size);
1734 if (r)
1735 return r;
1736
1737 /* Allocate all the needed memory */
1738 mapping = kmalloc(sizeof(*mapping), GFP_KERNEL);
1739 if (!mapping)
1740 return -ENOMEM;
1741
1742 r = amdgpu_vm_bo_clear_mappings(adev, bo_va->base.vm, saddr, size);
1743 if (r) {
1744 kfree(mapping);
1745 return r;
1746 }
1747
1748 saddr /= AMDGPU_GPU_PAGE_SIZE;
1749 eaddr = saddr + (size - 1) / AMDGPU_GPU_PAGE_SIZE;
1750
1751 mapping->start = saddr;
1752 mapping->last = eaddr;
1753 mapping->offset = offset;
1754 mapping->flags = flags;
1755
1756 amdgpu_vm_bo_insert_map(adev, bo_va, mapping);
1757
1758 return 0;
1759}
1760
1761/**
1762 * amdgpu_vm_bo_unmap - remove bo mapping from vm
1763 *
1764 * @adev: amdgpu_device pointer
1765 * @bo_va: bo_va to remove the address from
1766 * @saddr: where to the BO is mapped
1767 *
1768 * Remove a mapping of the BO at the specefied addr from the VM.
1769 *
1770 * Returns:
1771 * 0 for success, error for failure.
1772 *
1773 * Object has to be reserved and unreserved outside!
1774 */
1775int amdgpu_vm_bo_unmap(struct amdgpu_device *adev,
1776 struct amdgpu_bo_va *bo_va,
1777 uint64_t saddr)
1778{
1779 struct amdgpu_bo_va_mapping *mapping;
1780 struct amdgpu_vm *vm = bo_va->base.vm;
1781 bool valid = true;
1782
1783 saddr /= AMDGPU_GPU_PAGE_SIZE;
1784
1785 list_for_each_entry(mapping, &bo_va->valids, list) {
1786 if (mapping->start == saddr)
1787 break;
1788 }
1789
1790 if (&mapping->list == &bo_va->valids) {
1791 valid = false;
1792
1793 list_for_each_entry(mapping, &bo_va->invalids, list) {
1794 if (mapping->start == saddr)
1795 break;
1796 }
1797
1798 if (&mapping->list == &bo_va->invalids)
1799 return -ENOENT;
1800 }
1801
1802 list_del(&mapping->list);
1803 amdgpu_vm_it_remove(mapping, &vm->va);
1804 mapping->bo_va = NULL;
1805 trace_amdgpu_vm_bo_unmap(bo_va, mapping);
1806
1807 if (valid)
1808 list_add(&mapping->list, &vm->freed);
1809 else
1810 amdgpu_vm_free_mapping(adev, vm, mapping,
1811 bo_va->last_pt_update);
1812
1813 return 0;
1814}
1815
1816/**
1817 * amdgpu_vm_bo_clear_mappings - remove all mappings in a specific range
1818 *
1819 * @adev: amdgpu_device pointer
1820 * @vm: VM structure to use
1821 * @saddr: start of the range
1822 * @size: size of the range
1823 *
1824 * Remove all mappings in a range, split them as appropriate.
1825 *
1826 * Returns:
1827 * 0 for success, error for failure.
1828 */
1829int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev,
1830 struct amdgpu_vm *vm,
1831 uint64_t saddr, uint64_t size)
1832{
1833 struct amdgpu_bo_va_mapping *before, *after, *tmp, *next;
1834 LIST_HEAD(removed);
1835 uint64_t eaddr;
1836 int r;
1837
1838 r = amdgpu_vm_verify_parameters(adev, NULL, saddr, 0, size);
1839 if (r)
1840 return r;
1841
1842 saddr /= AMDGPU_GPU_PAGE_SIZE;
1843 eaddr = saddr + (size - 1) / AMDGPU_GPU_PAGE_SIZE;
1844
1845 /* Allocate all the needed memory */
1846 before = kzalloc(sizeof(*before), GFP_KERNEL);
1847 if (!before)
1848 return -ENOMEM;
1849 INIT_LIST_HEAD(&before->list);
1850
1851 after = kzalloc(sizeof(*after), GFP_KERNEL);
1852 if (!after) {
1853 kfree(before);
1854 return -ENOMEM;
1855 }
1856 INIT_LIST_HEAD(&after->list);
1857
1858 /* Now gather all removed mappings */
1859 tmp = amdgpu_vm_it_iter_first(&vm->va, saddr, eaddr);
1860 while (tmp) {
1861 /* Remember mapping split at the start */
1862 if (tmp->start < saddr) {
1863 before->start = tmp->start;
1864 before->last = saddr - 1;
1865 before->offset = tmp->offset;
1866 before->flags = tmp->flags;
1867 before->bo_va = tmp->bo_va;
1868 list_add(&before->list, &tmp->bo_va->invalids);
1869 }
1870
1871 /* Remember mapping split at the end */
1872 if (tmp->last > eaddr) {
1873 after->start = eaddr + 1;
1874 after->last = tmp->last;
1875 after->offset = tmp->offset;
1876 after->offset += (after->start - tmp->start) << PAGE_SHIFT;
1877 after->flags = tmp->flags;
1878 after->bo_va = tmp->bo_va;
1879 list_add(&after->list, &tmp->bo_va->invalids);
1880 }
1881
1882 list_del(&tmp->list);
1883 list_add(&tmp->list, &removed);
1884
1885 tmp = amdgpu_vm_it_iter_next(tmp, saddr, eaddr);
1886 }
1887
1888 /* And free them up */
1889 list_for_each_entry_safe(tmp, next, &removed, list) {
1890 amdgpu_vm_it_remove(tmp, &vm->va);
1891 list_del(&tmp->list);
1892
1893 if (tmp->start < saddr)
1894 tmp->start = saddr;
1895 if (tmp->last > eaddr)
1896 tmp->last = eaddr;
1897
1898 tmp->bo_va = NULL;
1899 list_add(&tmp->list, &vm->freed);
1900 trace_amdgpu_vm_bo_unmap(NULL, tmp);
1901 }
1902
1903 /* Insert partial mapping before the range */
1904 if (!list_empty(&before->list)) {
1905 struct amdgpu_bo *bo = before->bo_va->base.bo;
1906
1907 amdgpu_vm_it_insert(before, &vm->va);
1908 if (before->flags & AMDGPU_PTE_PRT)
1909 amdgpu_vm_prt_get(adev);
1910
1911 if (bo && bo->tbo.base.resv == vm->root.bo->tbo.base.resv &&
1912 !before->bo_va->base.moved)
1913 amdgpu_vm_bo_moved(&before->bo_va->base);
1914 } else {
1915 kfree(before);
1916 }
1917
1918 /* Insert partial mapping after the range */
1919 if (!list_empty(&after->list)) {
1920 struct amdgpu_bo *bo = after->bo_va->base.bo;
1921
1922 amdgpu_vm_it_insert(after, &vm->va);
1923 if (after->flags & AMDGPU_PTE_PRT)
1924 amdgpu_vm_prt_get(adev);
1925
1926 if (bo && bo->tbo.base.resv == vm->root.bo->tbo.base.resv &&
1927 !after->bo_va->base.moved)
1928 amdgpu_vm_bo_moved(&after->bo_va->base);
1929 } else {
1930 kfree(after);
1931 }
1932
1933 return 0;
1934}
1935
1936/**
1937 * amdgpu_vm_bo_lookup_mapping - find mapping by address
1938 *
1939 * @vm: the requested VM
1940 * @addr: the address
1941 *
1942 * Find a mapping by it's address.
1943 *
1944 * Returns:
1945 * The amdgpu_bo_va_mapping matching for addr or NULL
1946 *
1947 */
1948struct amdgpu_bo_va_mapping *amdgpu_vm_bo_lookup_mapping(struct amdgpu_vm *vm,
1949 uint64_t addr)
1950{
1951 return amdgpu_vm_it_iter_first(&vm->va, addr, addr);
1952}
1953
1954/**
1955 * amdgpu_vm_bo_trace_cs - trace all reserved mappings
1956 *
1957 * @vm: the requested vm
1958 * @ticket: CS ticket
1959 *
1960 * Trace all mappings of BOs reserved during a command submission.
1961 */
1962void amdgpu_vm_bo_trace_cs(struct amdgpu_vm *vm, struct ww_acquire_ctx *ticket)
1963{
1964 struct amdgpu_bo_va_mapping *mapping;
1965
1966 if (!trace_amdgpu_vm_bo_cs_enabled())
1967 return;
1968
1969 for (mapping = amdgpu_vm_it_iter_first(&vm->va, 0, U64_MAX); mapping;
1970 mapping = amdgpu_vm_it_iter_next(mapping, 0, U64_MAX)) {
1971 if (mapping->bo_va && mapping->bo_va->base.bo) {
1972 struct amdgpu_bo *bo;
1973
1974 bo = mapping->bo_va->base.bo;
1975 if (dma_resv_locking_ctx(bo->tbo.base.resv) !=
1976 ticket)
1977 continue;
1978 }
1979
1980 trace_amdgpu_vm_bo_cs(mapping);
1981 }
1982}
1983
1984/**
1985 * amdgpu_vm_bo_del - remove a bo from a specific vm
1986 *
1987 * @adev: amdgpu_device pointer
1988 * @bo_va: requested bo_va
1989 *
1990 * Remove @bo_va->bo from the requested vm.
1991 *
1992 * Object have to be reserved!
1993 */
1994void amdgpu_vm_bo_del(struct amdgpu_device *adev,
1995 struct amdgpu_bo_va *bo_va)
1996{
1997 struct amdgpu_bo_va_mapping *mapping, *next;
1998 struct amdgpu_bo *bo = bo_va->base.bo;
1999 struct amdgpu_vm *vm = bo_va->base.vm;
2000 struct amdgpu_vm_bo_base **base;
2001
2002 dma_resv_assert_held(vm->root.bo->tbo.base.resv);
2003
2004 if (bo) {
2005 dma_resv_assert_held(bo->tbo.base.resv);
2006 if (bo->tbo.base.resv == vm->root.bo->tbo.base.resv)
2007 ttm_bo_set_bulk_move(&bo->tbo, NULL);
2008
2009 for (base = &bo_va->base.bo->vm_bo; *base;
2010 base = &(*base)->next) {
2011 if (*base != &bo_va->base)
2012 continue;
2013
2014 *base = bo_va->base.next;
2015 break;
2016 }
2017 }
2018
2019 spin_lock(&vm->status_lock);
2020 list_del(&bo_va->base.vm_status);
2021 spin_unlock(&vm->status_lock);
2022
2023 list_for_each_entry_safe(mapping, next, &bo_va->valids, list) {
2024 list_del(&mapping->list);
2025 amdgpu_vm_it_remove(mapping, &vm->va);
2026 mapping->bo_va = NULL;
2027 trace_amdgpu_vm_bo_unmap(bo_va, mapping);
2028 list_add(&mapping->list, &vm->freed);
2029 }
2030 list_for_each_entry_safe(mapping, next, &bo_va->invalids, list) {
2031 list_del(&mapping->list);
2032 amdgpu_vm_it_remove(mapping, &vm->va);
2033 amdgpu_vm_free_mapping(adev, vm, mapping,
2034 bo_va->last_pt_update);
2035 }
2036
2037 dma_fence_put(bo_va->last_pt_update);
2038
2039 if (bo && bo_va->is_xgmi)
2040 amdgpu_xgmi_set_pstate(adev, AMDGPU_XGMI_PSTATE_MIN);
2041
2042 kfree(bo_va);
2043}
2044
2045/**
2046 * amdgpu_vm_evictable - check if we can evict a VM
2047 *
2048 * @bo: A page table of the VM.
2049 *
2050 * Check if it is possible to evict a VM.
2051 */
2052bool amdgpu_vm_evictable(struct amdgpu_bo *bo)
2053{
2054 struct amdgpu_vm_bo_base *bo_base = bo->vm_bo;
2055
2056 /* Page tables of a destroyed VM can go away immediately */
2057 if (!bo_base || !bo_base->vm)
2058 return true;
2059
2060 /* Don't evict VM page tables while they are busy */
2061 if (!dma_resv_test_signaled(bo->tbo.base.resv, DMA_RESV_USAGE_BOOKKEEP))
2062 return false;
2063
2064 /* Try to block ongoing updates */
2065 if (!amdgpu_vm_eviction_trylock(bo_base->vm))
2066 return false;
2067
2068 /* Don't evict VM page tables while they are updated */
2069 if (!dma_fence_is_signaled(bo_base->vm->last_unlocked)) {
2070 amdgpu_vm_eviction_unlock(bo_base->vm);
2071 return false;
2072 }
2073
2074 bo_base->vm->evicting = true;
2075 amdgpu_vm_eviction_unlock(bo_base->vm);
2076 return true;
2077}
2078
2079/**
2080 * amdgpu_vm_bo_invalidate - mark the bo as invalid
2081 *
2082 * @adev: amdgpu_device pointer
2083 * @bo: amdgpu buffer object
2084 * @evicted: is the BO evicted
2085 *
2086 * Mark @bo as invalid.
2087 */
2088void amdgpu_vm_bo_invalidate(struct amdgpu_device *adev,
2089 struct amdgpu_bo *bo, bool evicted)
2090{
2091 struct amdgpu_vm_bo_base *bo_base;
2092
2093 /* shadow bo doesn't have bo base, its validation needs its parent */
2094 if (bo->parent && (amdgpu_bo_shadowed(bo->parent) == bo))
2095 bo = bo->parent;
2096
2097 for (bo_base = bo->vm_bo; bo_base; bo_base = bo_base->next) {
2098 struct amdgpu_vm *vm = bo_base->vm;
2099
2100 if (evicted && bo->tbo.base.resv == vm->root.bo->tbo.base.resv) {
2101 amdgpu_vm_bo_evicted(bo_base);
2102 continue;
2103 }
2104
2105 if (bo_base->moved)
2106 continue;
2107 bo_base->moved = true;
2108
2109 if (bo->tbo.type == ttm_bo_type_kernel)
2110 amdgpu_vm_bo_relocated(bo_base);
2111 else if (bo->tbo.base.resv == vm->root.bo->tbo.base.resv)
2112 amdgpu_vm_bo_moved(bo_base);
2113 else
2114 amdgpu_vm_bo_invalidated(bo_base);
2115 }
2116}
2117
2118/**
2119 * amdgpu_vm_get_block_size - calculate VM page table size as power of two
2120 *
2121 * @vm_size: VM size
2122 *
2123 * Returns:
2124 * VM page table as power of two
2125 */
2126static uint32_t amdgpu_vm_get_block_size(uint64_t vm_size)
2127{
2128 /* Total bits covered by PD + PTs */
2129 unsigned bits = ilog2(vm_size) + 18;
2130
2131 /* Make sure the PD is 4K in size up to 8GB address space.
2132 Above that split equal between PD and PTs */
2133 if (vm_size <= 8)
2134 return (bits - 9);
2135 else
2136 return ((bits + 3) / 2);
2137}
2138
2139/**
2140 * amdgpu_vm_adjust_size - adjust vm size, block size and fragment size
2141 *
2142 * @adev: amdgpu_device pointer
2143 * @min_vm_size: the minimum vm size in GB if it's set auto
2144 * @fragment_size_default: Default PTE fragment size
2145 * @max_level: max VMPT level
2146 * @max_bits: max address space size in bits
2147 *
2148 */
2149void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t min_vm_size,
2150 uint32_t fragment_size_default, unsigned max_level,
2151 unsigned max_bits)
2152{
2153 unsigned int max_size = 1 << (max_bits - 30);
2154 unsigned int vm_size;
2155 uint64_t tmp;
2156
2157 /* adjust vm size first */
2158 if (amdgpu_vm_size != -1) {
2159 vm_size = amdgpu_vm_size;
2160 if (vm_size > max_size) {
2161 dev_warn(adev->dev, "VM size (%d) too large, max is %u GB\n",
2162 amdgpu_vm_size, max_size);
2163 vm_size = max_size;
2164 }
2165 } else {
2166 struct sysinfo si;
2167 unsigned int phys_ram_gb;
2168
2169 /* Optimal VM size depends on the amount of physical
2170 * RAM available. Underlying requirements and
2171 * assumptions:
2172 *
2173 * - Need to map system memory and VRAM from all GPUs
2174 * - VRAM from other GPUs not known here
2175 * - Assume VRAM <= system memory
2176 * - On GFX8 and older, VM space can be segmented for
2177 * different MTYPEs
2178 * - Need to allow room for fragmentation, guard pages etc.
2179 *
2180 * This adds up to a rough guess of system memory x3.
2181 * Round up to power of two to maximize the available
2182 * VM size with the given page table size.
2183 */
2184 si_meminfo(&si);
2185 phys_ram_gb = ((uint64_t)si.totalram * si.mem_unit +
2186 (1 << 30) - 1) >> 30;
2187 vm_size = roundup_pow_of_two(
2188 min(max(phys_ram_gb * 3, min_vm_size), max_size));
2189 }
2190
2191 adev->vm_manager.max_pfn = (uint64_t)vm_size << 18;
2192
2193 tmp = roundup_pow_of_two(adev->vm_manager.max_pfn);
2194 if (amdgpu_vm_block_size != -1)
2195 tmp >>= amdgpu_vm_block_size - 9;
2196 tmp = DIV_ROUND_UP(fls64(tmp) - 1, 9) - 1;
2197 adev->vm_manager.num_level = min_t(unsigned int, max_level, tmp);
2198 switch (adev->vm_manager.num_level) {
2199 case 3:
2200 adev->vm_manager.root_level = AMDGPU_VM_PDB2;
2201 break;
2202 case 2:
2203 adev->vm_manager.root_level = AMDGPU_VM_PDB1;
2204 break;
2205 case 1:
2206 adev->vm_manager.root_level = AMDGPU_VM_PDB0;
2207 break;
2208 default:
2209 dev_err(adev->dev, "VMPT only supports 2~4+1 levels\n");
2210 }
2211 /* block size depends on vm size and hw setup*/
2212 if (amdgpu_vm_block_size != -1)
2213 adev->vm_manager.block_size =
2214 min((unsigned)amdgpu_vm_block_size, max_bits
2215 - AMDGPU_GPU_PAGE_SHIFT
2216 - 9 * adev->vm_manager.num_level);
2217 else if (adev->vm_manager.num_level > 1)
2218 adev->vm_manager.block_size = 9;
2219 else
2220 adev->vm_manager.block_size = amdgpu_vm_get_block_size(tmp);
2221
2222 if (amdgpu_vm_fragment_size == -1)
2223 adev->vm_manager.fragment_size = fragment_size_default;
2224 else
2225 adev->vm_manager.fragment_size = amdgpu_vm_fragment_size;
2226
2227 DRM_INFO("vm size is %u GB, %u levels, block size is %u-bit, fragment size is %u-bit\n",
2228 vm_size, adev->vm_manager.num_level + 1,
2229 adev->vm_manager.block_size,
2230 adev->vm_manager.fragment_size);
2231}
2232
2233/**
2234 * amdgpu_vm_wait_idle - wait for the VM to become idle
2235 *
2236 * @vm: VM object to wait for
2237 * @timeout: timeout to wait for VM to become idle
2238 */
2239long amdgpu_vm_wait_idle(struct amdgpu_vm *vm, long timeout)
2240{
2241 timeout = dma_resv_wait_timeout(vm->root.bo->tbo.base.resv,
2242 DMA_RESV_USAGE_BOOKKEEP,
2243 true, timeout);
2244 if (timeout <= 0)
2245 return timeout;
2246
2247 return dma_fence_wait_timeout(vm->last_unlocked, true, timeout);
2248}
2249
2250static void amdgpu_vm_destroy_task_info(struct kref *kref)
2251{
2252 struct amdgpu_task_info *ti = container_of(kref, struct amdgpu_task_info, refcount);
2253
2254 kfree(ti);
2255}
2256
2257static inline struct amdgpu_vm *
2258amdgpu_vm_get_vm_from_pasid(struct amdgpu_device *adev, u32 pasid)
2259{
2260 struct amdgpu_vm *vm;
2261 unsigned long flags;
2262
2263 xa_lock_irqsave(&adev->vm_manager.pasids, flags);
2264 vm = xa_load(&adev->vm_manager.pasids, pasid);
2265 xa_unlock_irqrestore(&adev->vm_manager.pasids, flags);
2266
2267 return vm;
2268}
2269
2270/**
2271 * amdgpu_vm_put_task_info - reference down the vm task_info ptr
2272 *
2273 * @task_info: task_info struct under discussion.
2274 *
2275 * frees the vm task_info ptr at the last put
2276 */
2277void amdgpu_vm_put_task_info(struct amdgpu_task_info *task_info)
2278{
2279 kref_put(&task_info->refcount, amdgpu_vm_destroy_task_info);
2280}
2281
2282/**
2283 * amdgpu_vm_get_task_info_vm - Extracts task info for a vm.
2284 *
2285 * @vm: VM to get info from
2286 *
2287 * Returns the reference counted task_info structure, which must be
2288 * referenced down with amdgpu_vm_put_task_info.
2289 */
2290struct amdgpu_task_info *
2291amdgpu_vm_get_task_info_vm(struct amdgpu_vm *vm)
2292{
2293 struct amdgpu_task_info *ti = NULL;
2294
2295 if (vm) {
2296 ti = vm->task_info;
2297 kref_get(&vm->task_info->refcount);
2298 }
2299
2300 return ti;
2301}
2302
2303/**
2304 * amdgpu_vm_get_task_info_pasid - Extracts task info for a PASID.
2305 *
2306 * @adev: drm device pointer
2307 * @pasid: PASID identifier for VM
2308 *
2309 * Returns the reference counted task_info structure, which must be
2310 * referenced down with amdgpu_vm_put_task_info.
2311 */
2312struct amdgpu_task_info *
2313amdgpu_vm_get_task_info_pasid(struct amdgpu_device *adev, u32 pasid)
2314{
2315 return amdgpu_vm_get_task_info_vm(
2316 amdgpu_vm_get_vm_from_pasid(adev, pasid));
2317}
2318
2319static int amdgpu_vm_create_task_info(struct amdgpu_vm *vm)
2320{
2321 vm->task_info = kzalloc(sizeof(struct amdgpu_task_info), GFP_KERNEL);
2322 if (!vm->task_info)
2323 return -ENOMEM;
2324
2325 kref_init(&vm->task_info->refcount);
2326 return 0;
2327}
2328
2329/**
2330 * amdgpu_vm_set_task_info - Sets VMs task info.
2331 *
2332 * @vm: vm for which to set the info
2333 */
2334void amdgpu_vm_set_task_info(struct amdgpu_vm *vm)
2335{
2336 if (!vm->task_info)
2337 return;
2338
2339 if (vm->task_info->pid == current->pid)
2340 return;
2341
2342 vm->task_info->pid = current->pid;
2343 get_task_comm(vm->task_info->task_name, current);
2344
2345 if (current->group_leader->mm != current->mm)
2346 return;
2347
2348 vm->task_info->tgid = current->group_leader->pid;
2349 get_task_comm(vm->task_info->process_name, current->group_leader);
2350}
2351
2352/**
2353 * amdgpu_vm_init - initialize a vm instance
2354 *
2355 * @adev: amdgpu_device pointer
2356 * @vm: requested vm
2357 * @xcp_id: GPU partition selection id
2358 *
2359 * Init @vm fields.
2360 *
2361 * Returns:
2362 * 0 for success, error for failure.
2363 */
2364int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
2365 int32_t xcp_id)
2366{
2367 struct amdgpu_bo *root_bo;
2368 struct amdgpu_bo_vm *root;
2369 int r, i;
2370
2371 vm->va = RB_ROOT_CACHED;
2372 for (i = 0; i < AMDGPU_MAX_VMHUBS; i++)
2373 vm->reserved_vmid[i] = NULL;
2374 INIT_LIST_HEAD(&vm->evicted);
2375 INIT_LIST_HEAD(&vm->evicted_user);
2376 INIT_LIST_HEAD(&vm->relocated);
2377 INIT_LIST_HEAD(&vm->moved);
2378 INIT_LIST_HEAD(&vm->idle);
2379 INIT_LIST_HEAD(&vm->invalidated);
2380 spin_lock_init(&vm->status_lock);
2381 INIT_LIST_HEAD(&vm->freed);
2382 INIT_LIST_HEAD(&vm->done);
2383 INIT_LIST_HEAD(&vm->pt_freed);
2384 INIT_WORK(&vm->pt_free_work, amdgpu_vm_pt_free_work);
2385 INIT_KFIFO(vm->faults);
2386
2387 r = amdgpu_vm_init_entities(adev, vm);
2388 if (r)
2389 return r;
2390
2391 vm->is_compute_context = false;
2392
2393 vm->use_cpu_for_update = !!(adev->vm_manager.vm_update_mode &
2394 AMDGPU_VM_USE_CPU_FOR_GFX);
2395
2396 DRM_DEBUG_DRIVER("VM update mode is %s\n",
2397 vm->use_cpu_for_update ? "CPU" : "SDMA");
2398 WARN_ONCE((vm->use_cpu_for_update &&
2399 !amdgpu_gmc_vram_full_visible(&adev->gmc)),
2400 "CPU update of VM recommended only for large BAR system\n");
2401
2402 if (vm->use_cpu_for_update)
2403 vm->update_funcs = &amdgpu_vm_cpu_funcs;
2404 else
2405 vm->update_funcs = &amdgpu_vm_sdma_funcs;
2406
2407 vm->last_update = dma_fence_get_stub();
2408 vm->last_unlocked = dma_fence_get_stub();
2409 vm->last_tlb_flush = dma_fence_get_stub();
2410 vm->generation = 0;
2411
2412 mutex_init(&vm->eviction_lock);
2413 vm->evicting = false;
2414
2415 r = amdgpu_vm_pt_create(adev, vm, adev->vm_manager.root_level,
2416 false, &root, xcp_id);
2417 if (r)
2418 goto error_free_delayed;
2419
2420 root_bo = amdgpu_bo_ref(&root->bo);
2421 r = amdgpu_bo_reserve(root_bo, true);
2422 if (r) {
2423 amdgpu_bo_unref(&root->shadow);
2424 amdgpu_bo_unref(&root_bo);
2425 goto error_free_delayed;
2426 }
2427
2428 amdgpu_vm_bo_base_init(&vm->root, vm, root_bo);
2429 r = dma_resv_reserve_fences(root_bo->tbo.base.resv, 1);
2430 if (r)
2431 goto error_free_root;
2432
2433 r = amdgpu_vm_pt_clear(adev, vm, root, false);
2434 if (r)
2435 goto error_free_root;
2436
2437 r = amdgpu_vm_create_task_info(vm);
2438 if (r)
2439 DRM_DEBUG("Failed to create task info for VM\n");
2440
2441 amdgpu_bo_unreserve(vm->root.bo);
2442 amdgpu_bo_unref(&root_bo);
2443
2444 return 0;
2445
2446error_free_root:
2447 amdgpu_vm_pt_free_root(adev, vm);
2448 amdgpu_bo_unreserve(vm->root.bo);
2449 amdgpu_bo_unref(&root_bo);
2450
2451error_free_delayed:
2452 dma_fence_put(vm->last_tlb_flush);
2453 dma_fence_put(vm->last_unlocked);
2454 amdgpu_vm_fini_entities(vm);
2455
2456 return r;
2457}
2458
2459/**
2460 * amdgpu_vm_make_compute - Turn a GFX VM into a compute VM
2461 *
2462 * @adev: amdgpu_device pointer
2463 * @vm: requested vm
2464 *
2465 * This only works on GFX VMs that don't have any BOs added and no
2466 * page tables allocated yet.
2467 *
2468 * Changes the following VM parameters:
2469 * - use_cpu_for_update
2470 * - pte_supports_ats
2471 *
2472 * Reinitializes the page directory to reflect the changed ATS
2473 * setting.
2474 *
2475 * Returns:
2476 * 0 for success, -errno for errors.
2477 */
2478int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm)
2479{
2480 int r;
2481
2482 r = amdgpu_bo_reserve(vm->root.bo, true);
2483 if (r)
2484 return r;
2485
2486 /* Update VM state */
2487 vm->use_cpu_for_update = !!(adev->vm_manager.vm_update_mode &
2488 AMDGPU_VM_USE_CPU_FOR_COMPUTE);
2489 DRM_DEBUG_DRIVER("VM update mode is %s\n",
2490 vm->use_cpu_for_update ? "CPU" : "SDMA");
2491 WARN_ONCE((vm->use_cpu_for_update &&
2492 !amdgpu_gmc_vram_full_visible(&adev->gmc)),
2493 "CPU update of VM recommended only for large BAR system\n");
2494
2495 if (vm->use_cpu_for_update) {
2496 /* Sync with last SDMA update/clear before switching to CPU */
2497 r = amdgpu_bo_sync_wait(vm->root.bo,
2498 AMDGPU_FENCE_OWNER_UNDEFINED, true);
2499 if (r)
2500 goto unreserve_bo;
2501
2502 vm->update_funcs = &amdgpu_vm_cpu_funcs;
2503 r = amdgpu_vm_pt_map_tables(adev, vm);
2504 if (r)
2505 goto unreserve_bo;
2506
2507 } else {
2508 vm->update_funcs = &amdgpu_vm_sdma_funcs;
2509 }
2510
2511 dma_fence_put(vm->last_update);
2512 vm->last_update = dma_fence_get_stub();
2513 vm->is_compute_context = true;
2514
2515 /* Free the shadow bo for compute VM */
2516 amdgpu_bo_unref(&to_amdgpu_bo_vm(vm->root.bo)->shadow);
2517
2518 goto unreserve_bo;
2519
2520unreserve_bo:
2521 amdgpu_bo_unreserve(vm->root.bo);
2522 return r;
2523}
2524
2525/**
2526 * amdgpu_vm_release_compute - release a compute vm
2527 * @adev: amdgpu_device pointer
2528 * @vm: a vm turned into compute vm by calling amdgpu_vm_make_compute
2529 *
2530 * This is a correspondant of amdgpu_vm_make_compute. It decouples compute
2531 * pasid from vm. Compute should stop use of vm after this call.
2532 */
2533void amdgpu_vm_release_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm)
2534{
2535 amdgpu_vm_set_pasid(adev, vm, 0);
2536 vm->is_compute_context = false;
2537}
2538
2539/**
2540 * amdgpu_vm_fini - tear down a vm instance
2541 *
2542 * @adev: amdgpu_device pointer
2543 * @vm: requested vm
2544 *
2545 * Tear down @vm.
2546 * Unbind the VM and remove all bos from the vm bo list
2547 */
2548void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm)
2549{
2550 struct amdgpu_bo_va_mapping *mapping, *tmp;
2551 bool prt_fini_needed = !!adev->gmc.gmc_funcs->set_prt;
2552 struct amdgpu_bo *root;
2553 unsigned long flags;
2554 int i;
2555
2556 amdgpu_amdkfd_gpuvm_destroy_cb(adev, vm);
2557
2558 flush_work(&vm->pt_free_work);
2559
2560 root = amdgpu_bo_ref(vm->root.bo);
2561 amdgpu_bo_reserve(root, true);
2562 amdgpu_vm_put_task_info(vm->task_info);
2563 amdgpu_vm_set_pasid(adev, vm, 0);
2564 dma_fence_wait(vm->last_unlocked, false);
2565 dma_fence_put(vm->last_unlocked);
2566 dma_fence_wait(vm->last_tlb_flush, false);
2567 /* Make sure that all fence callbacks have completed */
2568 spin_lock_irqsave(vm->last_tlb_flush->lock, flags);
2569 spin_unlock_irqrestore(vm->last_tlb_flush->lock, flags);
2570 dma_fence_put(vm->last_tlb_flush);
2571
2572 list_for_each_entry_safe(mapping, tmp, &vm->freed, list) {
2573 if (mapping->flags & AMDGPU_PTE_PRT && prt_fini_needed) {
2574 amdgpu_vm_prt_fini(adev, vm);
2575 prt_fini_needed = false;
2576 }
2577
2578 list_del(&mapping->list);
2579 amdgpu_vm_free_mapping(adev, vm, mapping, NULL);
2580 }
2581
2582 amdgpu_vm_pt_free_root(adev, vm);
2583 amdgpu_bo_unreserve(root);
2584 amdgpu_bo_unref(&root);
2585 WARN_ON(vm->root.bo);
2586
2587 amdgpu_vm_fini_entities(vm);
2588
2589 if (!RB_EMPTY_ROOT(&vm->va.rb_root)) {
2590 dev_err(adev->dev, "still active bo inside vm\n");
2591 }
2592 rbtree_postorder_for_each_entry_safe(mapping, tmp,
2593 &vm->va.rb_root, rb) {
2594 /* Don't remove the mapping here, we don't want to trigger a
2595 * rebalance and the tree is about to be destroyed anyway.
2596 */
2597 list_del(&mapping->list);
2598 kfree(mapping);
2599 }
2600
2601 dma_fence_put(vm->last_update);
2602
2603 for (i = 0; i < AMDGPU_MAX_VMHUBS; i++) {
2604 if (vm->reserved_vmid[i]) {
2605 amdgpu_vmid_free_reserved(adev, i);
2606 vm->reserved_vmid[i] = false;
2607 }
2608 }
2609
2610}
2611
2612/**
2613 * amdgpu_vm_manager_init - init the VM manager
2614 *
2615 * @adev: amdgpu_device pointer
2616 *
2617 * Initialize the VM manager structures
2618 */
2619void amdgpu_vm_manager_init(struct amdgpu_device *adev)
2620{
2621 unsigned i;
2622
2623 /* Concurrent flushes are only possible starting with Vega10 and
2624 * are broken on Navi10 and Navi14.
2625 */
2626 adev->vm_manager.concurrent_flush = !(adev->asic_type < CHIP_VEGA10 ||
2627 adev->asic_type == CHIP_NAVI10 ||
2628 adev->asic_type == CHIP_NAVI14);
2629 amdgpu_vmid_mgr_init(adev);
2630
2631 adev->vm_manager.fence_context =
2632 dma_fence_context_alloc(AMDGPU_MAX_RINGS);
2633 for (i = 0; i < AMDGPU_MAX_RINGS; ++i)
2634 adev->vm_manager.seqno[i] = 0;
2635
2636 spin_lock_init(&adev->vm_manager.prt_lock);
2637 atomic_set(&adev->vm_manager.num_prt_users, 0);
2638
2639 /* If not overridden by the user, by default, only in large BAR systems
2640 * Compute VM tables will be updated by CPU
2641 */
2642#ifdef CONFIG_X86_64
2643 if (amdgpu_vm_update_mode == -1) {
2644 /* For asic with VF MMIO access protection
2645 * avoid using CPU for VM table updates
2646 */
2647 if (amdgpu_gmc_vram_full_visible(&adev->gmc) &&
2648 !amdgpu_sriov_vf_mmio_access_protection(adev))
2649 adev->vm_manager.vm_update_mode =
2650 AMDGPU_VM_USE_CPU_FOR_COMPUTE;
2651 else
2652 adev->vm_manager.vm_update_mode = 0;
2653 } else
2654 adev->vm_manager.vm_update_mode = amdgpu_vm_update_mode;
2655#else
2656 adev->vm_manager.vm_update_mode = 0;
2657#endif
2658
2659 xa_init_flags(&adev->vm_manager.pasids, XA_FLAGS_LOCK_IRQ);
2660}
2661
2662/**
2663 * amdgpu_vm_manager_fini - cleanup VM manager
2664 *
2665 * @adev: amdgpu_device pointer
2666 *
2667 * Cleanup the VM manager and free resources.
2668 */
2669void amdgpu_vm_manager_fini(struct amdgpu_device *adev)
2670{
2671 WARN_ON(!xa_empty(&adev->vm_manager.pasids));
2672 xa_destroy(&adev->vm_manager.pasids);
2673
2674 amdgpu_vmid_mgr_fini(adev);
2675}
2676
2677/**
2678 * amdgpu_vm_ioctl - Manages VMID reservation for vm hubs.
2679 *
2680 * @dev: drm device pointer
2681 * @data: drm_amdgpu_vm
2682 * @filp: drm file pointer
2683 *
2684 * Returns:
2685 * 0 for success, -errno for errors.
2686 */
2687int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
2688{
2689 union drm_amdgpu_vm *args = data;
2690 struct amdgpu_device *adev = drm_to_adev(dev);
2691 struct amdgpu_fpriv *fpriv = filp->driver_priv;
2692
2693 /* No valid flags defined yet */
2694 if (args->in.flags)
2695 return -EINVAL;
2696
2697 switch (args->in.op) {
2698 case AMDGPU_VM_OP_RESERVE_VMID:
2699 /* We only have requirement to reserve vmid from gfxhub */
2700 if (!fpriv->vm.reserved_vmid[AMDGPU_GFXHUB(0)]) {
2701 amdgpu_vmid_alloc_reserved(adev, AMDGPU_GFXHUB(0));
2702 fpriv->vm.reserved_vmid[AMDGPU_GFXHUB(0)] = true;
2703 }
2704
2705 break;
2706 case AMDGPU_VM_OP_UNRESERVE_VMID:
2707 if (fpriv->vm.reserved_vmid[AMDGPU_GFXHUB(0)]) {
2708 amdgpu_vmid_free_reserved(adev, AMDGPU_GFXHUB(0));
2709 fpriv->vm.reserved_vmid[AMDGPU_GFXHUB(0)] = false;
2710 }
2711 break;
2712 default:
2713 return -EINVAL;
2714 }
2715
2716 return 0;
2717}
2718
2719/**
2720 * amdgpu_vm_handle_fault - graceful handling of VM faults.
2721 * @adev: amdgpu device pointer
2722 * @pasid: PASID of the VM
2723 * @vmid: VMID, only used for GFX 9.4.3.
2724 * @node_id: Node_id received in IH cookie. Only applicable for
2725 * GFX 9.4.3.
2726 * @addr: Address of the fault
2727 * @write_fault: true is write fault, false is read fault
2728 *
2729 * Try to gracefully handle a VM fault. Return true if the fault was handled and
2730 * shouldn't be reported any more.
2731 */
2732bool amdgpu_vm_handle_fault(struct amdgpu_device *adev, u32 pasid,
2733 u32 vmid, u32 node_id, uint64_t addr,
2734 bool write_fault)
2735{
2736 bool is_compute_context = false;
2737 struct amdgpu_bo *root;
2738 unsigned long irqflags;
2739 uint64_t value, flags;
2740 struct amdgpu_vm *vm;
2741 int r;
2742
2743 xa_lock_irqsave(&adev->vm_manager.pasids, irqflags);
2744 vm = xa_load(&adev->vm_manager.pasids, pasid);
2745 if (vm) {
2746 root = amdgpu_bo_ref(vm->root.bo);
2747 is_compute_context = vm->is_compute_context;
2748 } else {
2749 root = NULL;
2750 }
2751 xa_unlock_irqrestore(&adev->vm_manager.pasids, irqflags);
2752
2753 if (!root)
2754 return false;
2755
2756 addr /= AMDGPU_GPU_PAGE_SIZE;
2757
2758 if (is_compute_context && !svm_range_restore_pages(adev, pasid, vmid,
2759 node_id, addr, write_fault)) {
2760 amdgpu_bo_unref(&root);
2761 return true;
2762 }
2763
2764 r = amdgpu_bo_reserve(root, true);
2765 if (r)
2766 goto error_unref;
2767
2768 /* Double check that the VM still exists */
2769 xa_lock_irqsave(&adev->vm_manager.pasids, irqflags);
2770 vm = xa_load(&adev->vm_manager.pasids, pasid);
2771 if (vm && vm->root.bo != root)
2772 vm = NULL;
2773 xa_unlock_irqrestore(&adev->vm_manager.pasids, irqflags);
2774 if (!vm)
2775 goto error_unlock;
2776
2777 flags = AMDGPU_PTE_VALID | AMDGPU_PTE_SNOOPED |
2778 AMDGPU_PTE_SYSTEM;
2779
2780 if (is_compute_context) {
2781 /* Intentionally setting invalid PTE flag
2782 * combination to force a no-retry-fault
2783 */
2784 flags = AMDGPU_VM_NORETRY_FLAGS;
2785 value = 0;
2786 } else if (amdgpu_vm_fault_stop == AMDGPU_VM_FAULT_STOP_NEVER) {
2787 /* Redirect the access to the dummy page */
2788 value = adev->dummy_page_addr;
2789 flags |= AMDGPU_PTE_EXECUTABLE | AMDGPU_PTE_READABLE |
2790 AMDGPU_PTE_WRITEABLE;
2791
2792 } else {
2793 /* Let the hw retry silently on the PTE */
2794 value = 0;
2795 }
2796
2797 r = dma_resv_reserve_fences(root->tbo.base.resv, 1);
2798 if (r) {
2799 pr_debug("failed %d to reserve fence slot\n", r);
2800 goto error_unlock;
2801 }
2802
2803 r = amdgpu_vm_update_range(adev, vm, true, false, false, false,
2804 NULL, addr, addr, flags, value, 0, NULL, NULL, NULL);
2805 if (r)
2806 goto error_unlock;
2807
2808 r = amdgpu_vm_update_pdes(adev, vm, true);
2809
2810error_unlock:
2811 amdgpu_bo_unreserve(root);
2812 if (r < 0)
2813 DRM_ERROR("Can't handle page fault (%d)\n", r);
2814
2815error_unref:
2816 amdgpu_bo_unref(&root);
2817
2818 return false;
2819}
2820
2821#if defined(CONFIG_DEBUG_FS)
2822/**
2823 * amdgpu_debugfs_vm_bo_info - print BO info for the VM
2824 *
2825 * @vm: Requested VM for printing BO info
2826 * @m: debugfs file
2827 *
2828 * Print BO information in debugfs file for the VM
2829 */
2830void amdgpu_debugfs_vm_bo_info(struct amdgpu_vm *vm, struct seq_file *m)
2831{
2832 struct amdgpu_bo_va *bo_va, *tmp;
2833 u64 total_idle = 0;
2834 u64 total_evicted = 0;
2835 u64 total_relocated = 0;
2836 u64 total_moved = 0;
2837 u64 total_invalidated = 0;
2838 u64 total_done = 0;
2839 unsigned int total_idle_objs = 0;
2840 unsigned int total_evicted_objs = 0;
2841 unsigned int total_relocated_objs = 0;
2842 unsigned int total_moved_objs = 0;
2843 unsigned int total_invalidated_objs = 0;
2844 unsigned int total_done_objs = 0;
2845 unsigned int id = 0;
2846
2847 spin_lock(&vm->status_lock);
2848 seq_puts(m, "\tIdle BOs:\n");
2849 list_for_each_entry_safe(bo_va, tmp, &vm->idle, base.vm_status) {
2850 if (!bo_va->base.bo)
2851 continue;
2852 total_idle += amdgpu_bo_print_info(id++, bo_va->base.bo, m);
2853 }
2854 total_idle_objs = id;
2855 id = 0;
2856
2857 seq_puts(m, "\tEvicted BOs:\n");
2858 list_for_each_entry_safe(bo_va, tmp, &vm->evicted, base.vm_status) {
2859 if (!bo_va->base.bo)
2860 continue;
2861 total_evicted += amdgpu_bo_print_info(id++, bo_va->base.bo, m);
2862 }
2863 total_evicted_objs = id;
2864 id = 0;
2865
2866 seq_puts(m, "\tRelocated BOs:\n");
2867 list_for_each_entry_safe(bo_va, tmp, &vm->relocated, base.vm_status) {
2868 if (!bo_va->base.bo)
2869 continue;
2870 total_relocated += amdgpu_bo_print_info(id++, bo_va->base.bo, m);
2871 }
2872 total_relocated_objs = id;
2873 id = 0;
2874
2875 seq_puts(m, "\tMoved BOs:\n");
2876 list_for_each_entry_safe(bo_va, tmp, &vm->moved, base.vm_status) {
2877 if (!bo_va->base.bo)
2878 continue;
2879 total_moved += amdgpu_bo_print_info(id++, bo_va->base.bo, m);
2880 }
2881 total_moved_objs = id;
2882 id = 0;
2883
2884 seq_puts(m, "\tInvalidated BOs:\n");
2885 list_for_each_entry_safe(bo_va, tmp, &vm->invalidated, base.vm_status) {
2886 if (!bo_va->base.bo)
2887 continue;
2888 total_invalidated += amdgpu_bo_print_info(id++, bo_va->base.bo, m);
2889 }
2890 total_invalidated_objs = id;
2891 id = 0;
2892
2893 seq_puts(m, "\tDone BOs:\n");
2894 list_for_each_entry_safe(bo_va, tmp, &vm->done, base.vm_status) {
2895 if (!bo_va->base.bo)
2896 continue;
2897 total_done += amdgpu_bo_print_info(id++, bo_va->base.bo, m);
2898 }
2899 spin_unlock(&vm->status_lock);
2900 total_done_objs = id;
2901
2902 seq_printf(m, "\tTotal idle size: %12lld\tobjs:\t%d\n", total_idle,
2903 total_idle_objs);
2904 seq_printf(m, "\tTotal evicted size: %12lld\tobjs:\t%d\n", total_evicted,
2905 total_evicted_objs);
2906 seq_printf(m, "\tTotal relocated size: %12lld\tobjs:\t%d\n", total_relocated,
2907 total_relocated_objs);
2908 seq_printf(m, "\tTotal moved size: %12lld\tobjs:\t%d\n", total_moved,
2909 total_moved_objs);
2910 seq_printf(m, "\tTotal invalidated size: %12lld\tobjs:\t%d\n", total_invalidated,
2911 total_invalidated_objs);
2912 seq_printf(m, "\tTotal done size: %12lld\tobjs:\t%d\n", total_done,
2913 total_done_objs);
2914}
2915#endif
2916
2917/**
2918 * amdgpu_vm_update_fault_cache - update cached fault into.
2919 * @adev: amdgpu device pointer
2920 * @pasid: PASID of the VM
2921 * @addr: Address of the fault
2922 * @status: GPUVM fault status register
2923 * @vmhub: which vmhub got the fault
2924 *
2925 * Cache the fault info for later use by userspace in debugging.
2926 */
2927void amdgpu_vm_update_fault_cache(struct amdgpu_device *adev,
2928 unsigned int pasid,
2929 uint64_t addr,
2930 uint32_t status,
2931 unsigned int vmhub)
2932{
2933 struct amdgpu_vm *vm;
2934 unsigned long flags;
2935
2936 xa_lock_irqsave(&adev->vm_manager.pasids, flags);
2937
2938 vm = xa_load(&adev->vm_manager.pasids, pasid);
2939 /* Don't update the fault cache if status is 0. In the multiple
2940 * fault case, subsequent faults will return a 0 status which is
2941 * useless for userspace and replaces the useful fault status, so
2942 * only update if status is non-0.
2943 */
2944 if (vm && status) {
2945 vm->fault_info.addr = addr;
2946 vm->fault_info.status = status;
2947 if (AMDGPU_IS_GFXHUB(vmhub)) {
2948 vm->fault_info.vmhub = AMDGPU_VMHUB_TYPE_GFX;
2949 vm->fault_info.vmhub |=
2950 (vmhub - AMDGPU_GFXHUB_START) << AMDGPU_VMHUB_IDX_SHIFT;
2951 } else if (AMDGPU_IS_MMHUB0(vmhub)) {
2952 vm->fault_info.vmhub = AMDGPU_VMHUB_TYPE_MM0;
2953 vm->fault_info.vmhub |=
2954 (vmhub - AMDGPU_MMHUB0_START) << AMDGPU_VMHUB_IDX_SHIFT;
2955 } else if (AMDGPU_IS_MMHUB1(vmhub)) {
2956 vm->fault_info.vmhub = AMDGPU_VMHUB_TYPE_MM1;
2957 vm->fault_info.vmhub |=
2958 (vmhub - AMDGPU_MMHUB1_START) << AMDGPU_VMHUB_IDX_SHIFT;
2959 } else {
2960 WARN_ONCE(1, "Invalid vmhub %u\n", vmhub);
2961 }
2962 }
2963 xa_unlock_irqrestore(&adev->vm_manager.pasids, flags);
2964}
2965
1/*
2 * Copyright 2008 Advanced Micro Devices, Inc.
3 * Copyright 2008 Red Hat Inc.
4 * Copyright 2009 Jerome Glisse.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Dave Airlie
25 * Alex Deucher
26 * Jerome Glisse
27 */
28
29#include <linux/dma-fence-array.h>
30#include <linux/interval_tree_generic.h>
31#include <linux/idr.h>
32#include <linux/dma-buf.h>
33
34#include <drm/amdgpu_drm.h>
35#include <drm/drm_drv.h>
36#include <drm/ttm/ttm_tt.h>
37#include <drm/drm_exec.h>
38#include "amdgpu.h"
39#include "amdgpu_trace.h"
40#include "amdgpu_amdkfd.h"
41#include "amdgpu_gmc.h"
42#include "amdgpu_xgmi.h"
43#include "amdgpu_dma_buf.h"
44#include "amdgpu_res_cursor.h"
45#include "kfd_svm.h"
46
47/**
48 * DOC: GPUVM
49 *
50 * GPUVM is the MMU functionality provided on the GPU.
51 * GPUVM is similar to the legacy GART on older asics, however
52 * rather than there being a single global GART table
53 * for the entire GPU, there can be multiple GPUVM page tables active
54 * at any given time. The GPUVM page tables can contain a mix
55 * VRAM pages and system pages (both memory and MMIO) and system pages
56 * can be mapped as snooped (cached system pages) or unsnooped
57 * (uncached system pages).
58 *
59 * Each active GPUVM has an ID associated with it and there is a page table
60 * linked with each VMID. When executing a command buffer,
61 * the kernel tells the engine what VMID to use for that command
62 * buffer. VMIDs are allocated dynamically as commands are submitted.
63 * The userspace drivers maintain their own address space and the kernel
64 * sets up their pages tables accordingly when they submit their
65 * command buffers and a VMID is assigned.
66 * The hardware supports up to 16 active GPUVMs at any given time.
67 *
68 * Each GPUVM is represented by a 1-2 or 1-5 level page table, depending
69 * on the ASIC family. GPUVM supports RWX attributes on each page as well
70 * as other features such as encryption and caching attributes.
71 *
72 * VMID 0 is special. It is the GPUVM used for the kernel driver. In
73 * addition to an aperture managed by a page table, VMID 0 also has
74 * several other apertures. There is an aperture for direct access to VRAM
75 * and there is a legacy AGP aperture which just forwards accesses directly
76 * to the matching system physical addresses (or IOVAs when an IOMMU is
77 * present). These apertures provide direct access to these memories without
78 * incurring the overhead of a page table. VMID 0 is used by the kernel
79 * driver for tasks like memory management.
80 *
81 * GPU clients (i.e., engines on the GPU) use GPUVM VMIDs to access memory.
82 * For user applications, each application can have their own unique GPUVM
83 * address space. The application manages the address space and the kernel
84 * driver manages the GPUVM page tables for each process. If an GPU client
85 * accesses an invalid page, it will generate a GPU page fault, similar to
86 * accessing an invalid page on a CPU.
87 */
88
89#define START(node) ((node)->start)
90#define LAST(node) ((node)->last)
91
92INTERVAL_TREE_DEFINE(struct amdgpu_bo_va_mapping, rb, uint64_t, __subtree_last,
93 START, LAST, static, amdgpu_vm_it)
94
95#undef START
96#undef LAST
97
98/**
99 * struct amdgpu_prt_cb - Helper to disable partial resident texture feature from a fence callback
100 */
101struct amdgpu_prt_cb {
102
103 /**
104 * @adev: amdgpu device
105 */
106 struct amdgpu_device *adev;
107
108 /**
109 * @cb: callback
110 */
111 struct dma_fence_cb cb;
112};
113
114/**
115 * struct amdgpu_vm_tlb_seq_struct - Helper to increment the TLB flush sequence
116 */
117struct amdgpu_vm_tlb_seq_struct {
118 /**
119 * @vm: pointer to the amdgpu_vm structure to set the fence sequence on
120 */
121 struct amdgpu_vm *vm;
122
123 /**
124 * @cb: callback
125 */
126 struct dma_fence_cb cb;
127};
128
129/**
130 * amdgpu_vm_set_pasid - manage pasid and vm ptr mapping
131 *
132 * @adev: amdgpu_device pointer
133 * @vm: amdgpu_vm pointer
134 * @pasid: the pasid the VM is using on this GPU
135 *
136 * Set the pasid this VM is using on this GPU, can also be used to remove the
137 * pasid by passing in zero.
138 *
139 */
140int amdgpu_vm_set_pasid(struct amdgpu_device *adev, struct amdgpu_vm *vm,
141 u32 pasid)
142{
143 int r;
144
145 if (vm->pasid == pasid)
146 return 0;
147
148 if (vm->pasid) {
149 r = xa_err(xa_erase_irq(&adev->vm_manager.pasids, vm->pasid));
150 if (r < 0)
151 return r;
152
153 vm->pasid = 0;
154 }
155
156 if (pasid) {
157 r = xa_err(xa_store_irq(&adev->vm_manager.pasids, pasid, vm,
158 GFP_KERNEL));
159 if (r < 0)
160 return r;
161
162 vm->pasid = pasid;
163 }
164
165
166 return 0;
167}
168
169/**
170 * amdgpu_vm_bo_evicted - vm_bo is evicted
171 *
172 * @vm_bo: vm_bo which is evicted
173 *
174 * State for PDs/PTs and per VM BOs which are not at the location they should
175 * be.
176 */
177static void amdgpu_vm_bo_evicted(struct amdgpu_vm_bo_base *vm_bo)
178{
179 struct amdgpu_vm *vm = vm_bo->vm;
180 struct amdgpu_bo *bo = vm_bo->bo;
181
182 vm_bo->moved = true;
183 spin_lock(&vm_bo->vm->status_lock);
184 if (bo->tbo.type == ttm_bo_type_kernel)
185 list_move(&vm_bo->vm_status, &vm->evicted);
186 else
187 list_move_tail(&vm_bo->vm_status, &vm->evicted);
188 spin_unlock(&vm_bo->vm->status_lock);
189}
190/**
191 * amdgpu_vm_bo_moved - vm_bo is moved
192 *
193 * @vm_bo: vm_bo which is moved
194 *
195 * State for per VM BOs which are moved, but that change is not yet reflected
196 * in the page tables.
197 */
198static void amdgpu_vm_bo_moved(struct amdgpu_vm_bo_base *vm_bo)
199{
200 spin_lock(&vm_bo->vm->status_lock);
201 list_move(&vm_bo->vm_status, &vm_bo->vm->moved);
202 spin_unlock(&vm_bo->vm->status_lock);
203}
204
205/**
206 * amdgpu_vm_bo_idle - vm_bo is idle
207 *
208 * @vm_bo: vm_bo which is now idle
209 *
210 * State for PDs/PTs and per VM BOs which have gone through the state machine
211 * and are now idle.
212 */
213static void amdgpu_vm_bo_idle(struct amdgpu_vm_bo_base *vm_bo)
214{
215 spin_lock(&vm_bo->vm->status_lock);
216 list_move(&vm_bo->vm_status, &vm_bo->vm->idle);
217 spin_unlock(&vm_bo->vm->status_lock);
218 vm_bo->moved = false;
219}
220
221/**
222 * amdgpu_vm_bo_invalidated - vm_bo is invalidated
223 *
224 * @vm_bo: vm_bo which is now invalidated
225 *
226 * State for normal BOs which are invalidated and that change not yet reflected
227 * in the PTs.
228 */
229static void amdgpu_vm_bo_invalidated(struct amdgpu_vm_bo_base *vm_bo)
230{
231 spin_lock(&vm_bo->vm->status_lock);
232 list_move(&vm_bo->vm_status, &vm_bo->vm->invalidated);
233 spin_unlock(&vm_bo->vm->status_lock);
234}
235
236/**
237 * amdgpu_vm_bo_evicted_user - vm_bo is evicted
238 *
239 * @vm_bo: vm_bo which is evicted
240 *
241 * State for BOs used by user mode queues which are not at the location they
242 * should be.
243 */
244static void amdgpu_vm_bo_evicted_user(struct amdgpu_vm_bo_base *vm_bo)
245{
246 vm_bo->moved = true;
247 spin_lock(&vm_bo->vm->status_lock);
248 list_move(&vm_bo->vm_status, &vm_bo->vm->evicted_user);
249 spin_unlock(&vm_bo->vm->status_lock);
250}
251
252/**
253 * amdgpu_vm_bo_relocated - vm_bo is reloacted
254 *
255 * @vm_bo: vm_bo which is relocated
256 *
257 * State for PDs/PTs which needs to update their parent PD.
258 * For the root PD, just move to idle state.
259 */
260static void amdgpu_vm_bo_relocated(struct amdgpu_vm_bo_base *vm_bo)
261{
262 if (vm_bo->bo->parent) {
263 spin_lock(&vm_bo->vm->status_lock);
264 list_move(&vm_bo->vm_status, &vm_bo->vm->relocated);
265 spin_unlock(&vm_bo->vm->status_lock);
266 } else {
267 amdgpu_vm_bo_idle(vm_bo);
268 }
269}
270
271/**
272 * amdgpu_vm_bo_done - vm_bo is done
273 *
274 * @vm_bo: vm_bo which is now done
275 *
276 * State for normal BOs which are invalidated and that change has been updated
277 * in the PTs.
278 */
279static void amdgpu_vm_bo_done(struct amdgpu_vm_bo_base *vm_bo)
280{
281 spin_lock(&vm_bo->vm->status_lock);
282 list_move(&vm_bo->vm_status, &vm_bo->vm->done);
283 spin_unlock(&vm_bo->vm->status_lock);
284}
285
286/**
287 * amdgpu_vm_bo_reset_state_machine - reset the vm_bo state machine
288 * @vm: the VM which state machine to reset
289 *
290 * Move all vm_bo object in the VM into a state where they will be updated
291 * again during validation.
292 */
293static void amdgpu_vm_bo_reset_state_machine(struct amdgpu_vm *vm)
294{
295 struct amdgpu_vm_bo_base *vm_bo, *tmp;
296
297 spin_lock(&vm->status_lock);
298 list_splice_init(&vm->done, &vm->invalidated);
299 list_for_each_entry(vm_bo, &vm->invalidated, vm_status)
300 vm_bo->moved = true;
301 list_for_each_entry_safe(vm_bo, tmp, &vm->idle, vm_status) {
302 struct amdgpu_bo *bo = vm_bo->bo;
303
304 vm_bo->moved = true;
305 if (!bo || bo->tbo.type != ttm_bo_type_kernel)
306 list_move(&vm_bo->vm_status, &vm_bo->vm->moved);
307 else if (bo->parent)
308 list_move(&vm_bo->vm_status, &vm_bo->vm->relocated);
309 }
310 spin_unlock(&vm->status_lock);
311}
312
313/**
314 * amdgpu_vm_bo_base_init - Adds bo to the list of bos associated with the vm
315 *
316 * @base: base structure for tracking BO usage in a VM
317 * @vm: vm to which bo is to be added
318 * @bo: amdgpu buffer object
319 *
320 * Initialize a bo_va_base structure and add it to the appropriate lists
321 *
322 */
323void amdgpu_vm_bo_base_init(struct amdgpu_vm_bo_base *base,
324 struct amdgpu_vm *vm, struct amdgpu_bo *bo)
325{
326 base->vm = vm;
327 base->bo = bo;
328 base->next = NULL;
329 INIT_LIST_HEAD(&base->vm_status);
330
331 if (!bo)
332 return;
333 base->next = bo->vm_bo;
334 bo->vm_bo = base;
335
336 if (!amdgpu_vm_is_bo_always_valid(vm, bo))
337 return;
338
339 dma_resv_assert_held(vm->root.bo->tbo.base.resv);
340
341 ttm_bo_set_bulk_move(&bo->tbo, &vm->lru_bulk_move);
342 if (bo->tbo.type == ttm_bo_type_kernel && bo->parent)
343 amdgpu_vm_bo_relocated(base);
344 else
345 amdgpu_vm_bo_idle(base);
346
347 if (bo->preferred_domains &
348 amdgpu_mem_type_to_domain(bo->tbo.resource->mem_type))
349 return;
350
351 /*
352 * we checked all the prerequisites, but it looks like this per vm bo
353 * is currently evicted. add the bo to the evicted list to make sure it
354 * is validated on next vm use to avoid fault.
355 * */
356 amdgpu_vm_bo_evicted(base);
357}
358
359/**
360 * amdgpu_vm_lock_pd - lock PD in drm_exec
361 *
362 * @vm: vm providing the BOs
363 * @exec: drm execution context
364 * @num_fences: number of extra fences to reserve
365 *
366 * Lock the VM root PD in the DRM execution context.
367 */
368int amdgpu_vm_lock_pd(struct amdgpu_vm *vm, struct drm_exec *exec,
369 unsigned int num_fences)
370{
371 /* We need at least two fences for the VM PD/PT updates */
372 return drm_exec_prepare_obj(exec, &vm->root.bo->tbo.base,
373 2 + num_fences);
374}
375
376/**
377 * amdgpu_vm_move_to_lru_tail - move all BOs to the end of LRU
378 *
379 * @adev: amdgpu device pointer
380 * @vm: vm providing the BOs
381 *
382 * Move all BOs to the end of LRU and remember their positions to put them
383 * together.
384 */
385void amdgpu_vm_move_to_lru_tail(struct amdgpu_device *adev,
386 struct amdgpu_vm *vm)
387{
388 spin_lock(&adev->mman.bdev.lru_lock);
389 ttm_lru_bulk_move_tail(&vm->lru_bulk_move);
390 spin_unlock(&adev->mman.bdev.lru_lock);
391}
392
393/* Create scheduler entities for page table updates */
394static int amdgpu_vm_init_entities(struct amdgpu_device *adev,
395 struct amdgpu_vm *vm)
396{
397 int r;
398
399 r = drm_sched_entity_init(&vm->immediate, DRM_SCHED_PRIORITY_NORMAL,
400 adev->vm_manager.vm_pte_scheds,
401 adev->vm_manager.vm_pte_num_scheds, NULL);
402 if (r)
403 goto error;
404
405 return drm_sched_entity_init(&vm->delayed, DRM_SCHED_PRIORITY_NORMAL,
406 adev->vm_manager.vm_pte_scheds,
407 adev->vm_manager.vm_pte_num_scheds, NULL);
408
409error:
410 drm_sched_entity_destroy(&vm->immediate);
411 return r;
412}
413
414/* Destroy the entities for page table updates again */
415static void amdgpu_vm_fini_entities(struct amdgpu_vm *vm)
416{
417 drm_sched_entity_destroy(&vm->immediate);
418 drm_sched_entity_destroy(&vm->delayed);
419}
420
421/**
422 * amdgpu_vm_generation - return the page table re-generation counter
423 * @adev: the amdgpu_device
424 * @vm: optional VM to check, might be NULL
425 *
426 * Returns a page table re-generation token to allow checking if submissions
427 * are still valid to use this VM. The VM parameter might be NULL in which case
428 * just the VRAM lost counter will be used.
429 */
430uint64_t amdgpu_vm_generation(struct amdgpu_device *adev, struct amdgpu_vm *vm)
431{
432 uint64_t result = (u64)atomic_read(&adev->vram_lost_counter) << 32;
433
434 if (!vm)
435 return result;
436
437 result += lower_32_bits(vm->generation);
438 /* Add one if the page tables will be re-generated on next CS */
439 if (drm_sched_entity_error(&vm->delayed))
440 ++result;
441
442 return result;
443}
444
445/**
446 * amdgpu_vm_validate - validate evicted BOs tracked in the VM
447 *
448 * @adev: amdgpu device pointer
449 * @vm: vm providing the BOs
450 * @ticket: optional reservation ticket used to reserve the VM
451 * @validate: callback to do the validation
452 * @param: parameter for the validation callback
453 *
454 * Validate the page table BOs and per-VM BOs on command submission if
455 * necessary. If a ticket is given, also try to validate evicted user queue
456 * BOs. They must already be reserved with the given ticket.
457 *
458 * Returns:
459 * Validation result.
460 */
461int amdgpu_vm_validate(struct amdgpu_device *adev, struct amdgpu_vm *vm,
462 struct ww_acquire_ctx *ticket,
463 int (*validate)(void *p, struct amdgpu_bo *bo),
464 void *param)
465{
466 uint64_t new_vm_generation = amdgpu_vm_generation(adev, vm);
467 struct amdgpu_vm_bo_base *bo_base;
468 struct amdgpu_bo *bo;
469 int r;
470
471 if (vm->generation != new_vm_generation) {
472 vm->generation = new_vm_generation;
473 amdgpu_vm_bo_reset_state_machine(vm);
474 amdgpu_vm_fini_entities(vm);
475 r = amdgpu_vm_init_entities(adev, vm);
476 if (r)
477 return r;
478 }
479
480 spin_lock(&vm->status_lock);
481 while (!list_empty(&vm->evicted)) {
482 bo_base = list_first_entry(&vm->evicted,
483 struct amdgpu_vm_bo_base,
484 vm_status);
485 spin_unlock(&vm->status_lock);
486
487 bo = bo_base->bo;
488
489 r = validate(param, bo);
490 if (r)
491 return r;
492
493 if (bo->tbo.type != ttm_bo_type_kernel) {
494 amdgpu_vm_bo_moved(bo_base);
495 } else {
496 vm->update_funcs->map_table(to_amdgpu_bo_vm(bo));
497 amdgpu_vm_bo_relocated(bo_base);
498 }
499 spin_lock(&vm->status_lock);
500 }
501 while (ticket && !list_empty(&vm->evicted_user)) {
502 bo_base = list_first_entry(&vm->evicted_user,
503 struct amdgpu_vm_bo_base,
504 vm_status);
505 spin_unlock(&vm->status_lock);
506
507 bo = bo_base->bo;
508
509 if (dma_resv_locking_ctx(bo->tbo.base.resv) != ticket) {
510 struct amdgpu_task_info *ti = amdgpu_vm_get_task_info_vm(vm);
511
512 pr_warn_ratelimited("Evicted user BO is not reserved\n");
513 if (ti) {
514 pr_warn_ratelimited("pid %d\n", ti->pid);
515 amdgpu_vm_put_task_info(ti);
516 }
517
518 return -EINVAL;
519 }
520
521 r = validate(param, bo);
522 if (r)
523 return r;
524
525 amdgpu_vm_bo_invalidated(bo_base);
526
527 spin_lock(&vm->status_lock);
528 }
529 spin_unlock(&vm->status_lock);
530
531 amdgpu_vm_eviction_lock(vm);
532 vm->evicting = false;
533 amdgpu_vm_eviction_unlock(vm);
534
535 return 0;
536}
537
538/**
539 * amdgpu_vm_ready - check VM is ready for updates
540 *
541 * @vm: VM to check
542 *
543 * Check if all VM PDs/PTs are ready for updates
544 *
545 * Returns:
546 * True if VM is not evicting.
547 */
548bool amdgpu_vm_ready(struct amdgpu_vm *vm)
549{
550 bool empty;
551 bool ret;
552
553 amdgpu_vm_eviction_lock(vm);
554 ret = !vm->evicting;
555 amdgpu_vm_eviction_unlock(vm);
556
557 spin_lock(&vm->status_lock);
558 empty = list_empty(&vm->evicted);
559 spin_unlock(&vm->status_lock);
560
561 return ret && empty;
562}
563
564/**
565 * amdgpu_vm_check_compute_bug - check whether asic has compute vm bug
566 *
567 * @adev: amdgpu_device pointer
568 */
569void amdgpu_vm_check_compute_bug(struct amdgpu_device *adev)
570{
571 const struct amdgpu_ip_block *ip_block;
572 bool has_compute_vm_bug;
573 struct amdgpu_ring *ring;
574 int i;
575
576 has_compute_vm_bug = false;
577
578 ip_block = amdgpu_device_ip_get_ip_block(adev, AMD_IP_BLOCK_TYPE_GFX);
579 if (ip_block) {
580 /* Compute has a VM bug for GFX version < 7.
581 Compute has a VM bug for GFX 8 MEC firmware version < 673.*/
582 if (ip_block->version->major <= 7)
583 has_compute_vm_bug = true;
584 else if (ip_block->version->major == 8)
585 if (adev->gfx.mec_fw_version < 673)
586 has_compute_vm_bug = true;
587 }
588
589 for (i = 0; i < adev->num_rings; i++) {
590 ring = adev->rings[i];
591 if (ring->funcs->type == AMDGPU_RING_TYPE_COMPUTE)
592 /* only compute rings */
593 ring->has_compute_vm_bug = has_compute_vm_bug;
594 else
595 ring->has_compute_vm_bug = false;
596 }
597}
598
599/**
600 * amdgpu_vm_need_pipeline_sync - Check if pipe sync is needed for job.
601 *
602 * @ring: ring on which the job will be submitted
603 * @job: job to submit
604 *
605 * Returns:
606 * True if sync is needed.
607 */
608bool amdgpu_vm_need_pipeline_sync(struct amdgpu_ring *ring,
609 struct amdgpu_job *job)
610{
611 struct amdgpu_device *adev = ring->adev;
612 unsigned vmhub = ring->vm_hub;
613 struct amdgpu_vmid_mgr *id_mgr = &adev->vm_manager.id_mgr[vmhub];
614
615 if (job->vmid == 0)
616 return false;
617
618 if (job->vm_needs_flush || ring->has_compute_vm_bug)
619 return true;
620
621 if (ring->funcs->emit_gds_switch && job->gds_switch_needed)
622 return true;
623
624 if (amdgpu_vmid_had_gpu_reset(adev, &id_mgr->ids[job->vmid]))
625 return true;
626
627 return false;
628}
629
630/**
631 * amdgpu_vm_flush - hardware flush the vm
632 *
633 * @ring: ring to use for flush
634 * @job: related job
635 * @need_pipe_sync: is pipe sync needed
636 *
637 * Emit a VM flush when it is necessary.
638 *
639 * Returns:
640 * 0 on success, errno otherwise.
641 */
642int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job,
643 bool need_pipe_sync)
644{
645 struct amdgpu_device *adev = ring->adev;
646 unsigned vmhub = ring->vm_hub;
647 struct amdgpu_vmid_mgr *id_mgr = &adev->vm_manager.id_mgr[vmhub];
648 struct amdgpu_vmid *id = &id_mgr->ids[job->vmid];
649 bool spm_update_needed = job->spm_update_needed;
650 bool gds_switch_needed = ring->funcs->emit_gds_switch &&
651 job->gds_switch_needed;
652 bool vm_flush_needed = job->vm_needs_flush;
653 struct dma_fence *fence = NULL;
654 bool pasid_mapping_needed = false;
655 unsigned int patch;
656 int r;
657
658 if (amdgpu_vmid_had_gpu_reset(adev, id)) {
659 gds_switch_needed = true;
660 vm_flush_needed = true;
661 pasid_mapping_needed = true;
662 spm_update_needed = true;
663 }
664
665 mutex_lock(&id_mgr->lock);
666 if (id->pasid != job->pasid || !id->pasid_mapping ||
667 !dma_fence_is_signaled(id->pasid_mapping))
668 pasid_mapping_needed = true;
669 mutex_unlock(&id_mgr->lock);
670
671 gds_switch_needed &= !!ring->funcs->emit_gds_switch;
672 vm_flush_needed &= !!ring->funcs->emit_vm_flush &&
673 job->vm_pd_addr != AMDGPU_BO_INVALID_OFFSET;
674 pasid_mapping_needed &= adev->gmc.gmc_funcs->emit_pasid_mapping &&
675 ring->funcs->emit_wreg;
676
677 if (!vm_flush_needed && !gds_switch_needed && !need_pipe_sync &&
678 !(job->enforce_isolation && !job->vmid))
679 return 0;
680
681 amdgpu_ring_ib_begin(ring);
682 if (ring->funcs->init_cond_exec)
683 patch = amdgpu_ring_init_cond_exec(ring,
684 ring->cond_exe_gpu_addr);
685
686 if (need_pipe_sync)
687 amdgpu_ring_emit_pipeline_sync(ring);
688
689 if (adev->gfx.enable_cleaner_shader &&
690 ring->funcs->emit_cleaner_shader &&
691 job->enforce_isolation)
692 ring->funcs->emit_cleaner_shader(ring);
693
694 if (vm_flush_needed) {
695 trace_amdgpu_vm_flush(ring, job->vmid, job->vm_pd_addr);
696 amdgpu_ring_emit_vm_flush(ring, job->vmid, job->vm_pd_addr);
697 }
698
699 if (pasid_mapping_needed)
700 amdgpu_gmc_emit_pasid_mapping(ring, job->vmid, job->pasid);
701
702 if (spm_update_needed && adev->gfx.rlc.funcs->update_spm_vmid)
703 adev->gfx.rlc.funcs->update_spm_vmid(adev, ring, job->vmid);
704
705 if (!ring->is_mes_queue && ring->funcs->emit_gds_switch &&
706 gds_switch_needed) {
707 amdgpu_ring_emit_gds_switch(ring, job->vmid, job->gds_base,
708 job->gds_size, job->gws_base,
709 job->gws_size, job->oa_base,
710 job->oa_size);
711 }
712
713 if (vm_flush_needed || pasid_mapping_needed) {
714 r = amdgpu_fence_emit(ring, &fence, NULL, 0);
715 if (r)
716 return r;
717 }
718
719 if (vm_flush_needed) {
720 mutex_lock(&id_mgr->lock);
721 dma_fence_put(id->last_flush);
722 id->last_flush = dma_fence_get(fence);
723 id->current_gpu_reset_count =
724 atomic_read(&adev->gpu_reset_counter);
725 mutex_unlock(&id_mgr->lock);
726 }
727
728 if (pasid_mapping_needed) {
729 mutex_lock(&id_mgr->lock);
730 id->pasid = job->pasid;
731 dma_fence_put(id->pasid_mapping);
732 id->pasid_mapping = dma_fence_get(fence);
733 mutex_unlock(&id_mgr->lock);
734 }
735 dma_fence_put(fence);
736
737 amdgpu_ring_patch_cond_exec(ring, patch);
738
739 /* the double SWITCH_BUFFER here *cannot* be skipped by COND_EXEC */
740 if (ring->funcs->emit_switch_buffer) {
741 amdgpu_ring_emit_switch_buffer(ring);
742 amdgpu_ring_emit_switch_buffer(ring);
743 }
744
745 amdgpu_ring_ib_end(ring);
746 return 0;
747}
748
749/**
750 * amdgpu_vm_bo_find - find the bo_va for a specific vm & bo
751 *
752 * @vm: requested vm
753 * @bo: requested buffer object
754 *
755 * Find @bo inside the requested vm.
756 * Search inside the @bos vm list for the requested vm
757 * Returns the found bo_va or NULL if none is found
758 *
759 * Object has to be reserved!
760 *
761 * Returns:
762 * Found bo_va or NULL.
763 */
764struct amdgpu_bo_va *amdgpu_vm_bo_find(struct amdgpu_vm *vm,
765 struct amdgpu_bo *bo)
766{
767 struct amdgpu_vm_bo_base *base;
768
769 for (base = bo->vm_bo; base; base = base->next) {
770 if (base->vm != vm)
771 continue;
772
773 return container_of(base, struct amdgpu_bo_va, base);
774 }
775 return NULL;
776}
777
778/**
779 * amdgpu_vm_map_gart - Resolve gart mapping of addr
780 *
781 * @pages_addr: optional DMA address to use for lookup
782 * @addr: the unmapped addr
783 *
784 * Look up the physical address of the page that the pte resolves
785 * to.
786 *
787 * Returns:
788 * The pointer for the page table entry.
789 */
790uint64_t amdgpu_vm_map_gart(const dma_addr_t *pages_addr, uint64_t addr)
791{
792 uint64_t result;
793
794 /* page table offset */
795 result = pages_addr[addr >> PAGE_SHIFT];
796
797 /* in case cpu page size != gpu page size*/
798 result |= addr & (~PAGE_MASK);
799
800 result &= 0xFFFFFFFFFFFFF000ULL;
801
802 return result;
803}
804
805/**
806 * amdgpu_vm_update_pdes - make sure that all directories are valid
807 *
808 * @adev: amdgpu_device pointer
809 * @vm: requested vm
810 * @immediate: submit immediately to the paging queue
811 *
812 * Makes sure all directories are up to date.
813 *
814 * Returns:
815 * 0 for success, error for failure.
816 */
817int amdgpu_vm_update_pdes(struct amdgpu_device *adev,
818 struct amdgpu_vm *vm, bool immediate)
819{
820 struct amdgpu_vm_update_params params;
821 struct amdgpu_vm_bo_base *entry;
822 bool flush_tlb_needed = false;
823 LIST_HEAD(relocated);
824 int r, idx;
825
826 spin_lock(&vm->status_lock);
827 list_splice_init(&vm->relocated, &relocated);
828 spin_unlock(&vm->status_lock);
829
830 if (list_empty(&relocated))
831 return 0;
832
833 if (!drm_dev_enter(adev_to_drm(adev), &idx))
834 return -ENODEV;
835
836 memset(¶ms, 0, sizeof(params));
837 params.adev = adev;
838 params.vm = vm;
839 params.immediate = immediate;
840
841 r = vm->update_funcs->prepare(¶ms, NULL);
842 if (r)
843 goto error;
844
845 list_for_each_entry(entry, &relocated, vm_status) {
846 /* vm_flush_needed after updating moved PDEs */
847 flush_tlb_needed |= entry->moved;
848
849 r = amdgpu_vm_pde_update(¶ms, entry);
850 if (r)
851 goto error;
852 }
853
854 r = vm->update_funcs->commit(¶ms, &vm->last_update);
855 if (r)
856 goto error;
857
858 if (flush_tlb_needed)
859 atomic64_inc(&vm->tlb_seq);
860
861 while (!list_empty(&relocated)) {
862 entry = list_first_entry(&relocated, struct amdgpu_vm_bo_base,
863 vm_status);
864 amdgpu_vm_bo_idle(entry);
865 }
866
867error:
868 drm_dev_exit(idx);
869 return r;
870}
871
872/**
873 * amdgpu_vm_tlb_seq_cb - make sure to increment tlb sequence
874 * @fence: unused
875 * @cb: the callback structure
876 *
877 * Increments the tlb sequence to make sure that future CS execute a VM flush.
878 */
879static void amdgpu_vm_tlb_seq_cb(struct dma_fence *fence,
880 struct dma_fence_cb *cb)
881{
882 struct amdgpu_vm_tlb_seq_struct *tlb_cb;
883
884 tlb_cb = container_of(cb, typeof(*tlb_cb), cb);
885 atomic64_inc(&tlb_cb->vm->tlb_seq);
886 kfree(tlb_cb);
887}
888
889/**
890 * amdgpu_vm_tlb_flush - prepare TLB flush
891 *
892 * @params: parameters for update
893 * @fence: input fence to sync TLB flush with
894 * @tlb_cb: the callback structure
895 *
896 * Increments the tlb sequence to make sure that future CS execute a VM flush.
897 */
898static void
899amdgpu_vm_tlb_flush(struct amdgpu_vm_update_params *params,
900 struct dma_fence **fence,
901 struct amdgpu_vm_tlb_seq_struct *tlb_cb)
902{
903 struct amdgpu_vm *vm = params->vm;
904
905 tlb_cb->vm = vm;
906 if (!fence || !*fence) {
907 amdgpu_vm_tlb_seq_cb(NULL, &tlb_cb->cb);
908 return;
909 }
910
911 if (!dma_fence_add_callback(*fence, &tlb_cb->cb,
912 amdgpu_vm_tlb_seq_cb)) {
913 dma_fence_put(vm->last_tlb_flush);
914 vm->last_tlb_flush = dma_fence_get(*fence);
915 } else {
916 amdgpu_vm_tlb_seq_cb(NULL, &tlb_cb->cb);
917 }
918
919 /* Prepare a TLB flush fence to be attached to PTs */
920 if (!params->unlocked && vm->is_compute_context) {
921 amdgpu_vm_tlb_fence_create(params->adev, vm, fence);
922
923 /* Makes sure no PD/PT is freed before the flush */
924 dma_resv_add_fence(vm->root.bo->tbo.base.resv, *fence,
925 DMA_RESV_USAGE_BOOKKEEP);
926 }
927}
928
929/**
930 * amdgpu_vm_update_range - update a range in the vm page table
931 *
932 * @adev: amdgpu_device pointer to use for commands
933 * @vm: the VM to update the range
934 * @immediate: immediate submission in a page fault
935 * @unlocked: unlocked invalidation during MM callback
936 * @flush_tlb: trigger tlb invalidation after update completed
937 * @allow_override: change MTYPE for local NUMA nodes
938 * @sync: fences we need to sync to
939 * @start: start of mapped range
940 * @last: last mapped entry
941 * @flags: flags for the entries
942 * @offset: offset into nodes and pages_addr
943 * @vram_base: base for vram mappings
944 * @res: ttm_resource to map
945 * @pages_addr: DMA addresses to use for mapping
946 * @fence: optional resulting fence
947 *
948 * Fill in the page table entries between @start and @last.
949 *
950 * Returns:
951 * 0 for success, negative erro code for failure.
952 */
953int amdgpu_vm_update_range(struct amdgpu_device *adev, struct amdgpu_vm *vm,
954 bool immediate, bool unlocked, bool flush_tlb,
955 bool allow_override, struct amdgpu_sync *sync,
956 uint64_t start, uint64_t last, uint64_t flags,
957 uint64_t offset, uint64_t vram_base,
958 struct ttm_resource *res, dma_addr_t *pages_addr,
959 struct dma_fence **fence)
960{
961 struct amdgpu_vm_tlb_seq_struct *tlb_cb;
962 struct amdgpu_vm_update_params params;
963 struct amdgpu_res_cursor cursor;
964 int r, idx;
965
966 if (!drm_dev_enter(adev_to_drm(adev), &idx))
967 return -ENODEV;
968
969 tlb_cb = kmalloc(sizeof(*tlb_cb), GFP_KERNEL);
970 if (!tlb_cb) {
971 drm_dev_exit(idx);
972 return -ENOMEM;
973 }
974
975 /* Vega20+XGMI where PTEs get inadvertently cached in L2 texture cache,
976 * heavy-weight flush TLB unconditionally.
977 */
978 flush_tlb |= adev->gmc.xgmi.num_physical_nodes &&
979 amdgpu_ip_version(adev, GC_HWIP, 0) == IP_VERSION(9, 4, 0);
980
981 /*
982 * On GFX8 and older any 8 PTE block with a valid bit set enters the TLB
983 */
984 flush_tlb |= amdgpu_ip_version(adev, GC_HWIP, 0) < IP_VERSION(9, 0, 0);
985
986 memset(¶ms, 0, sizeof(params));
987 params.adev = adev;
988 params.vm = vm;
989 params.immediate = immediate;
990 params.pages_addr = pages_addr;
991 params.unlocked = unlocked;
992 params.needs_flush = flush_tlb;
993 params.allow_override = allow_override;
994 INIT_LIST_HEAD(¶ms.tlb_flush_waitlist);
995
996 amdgpu_vm_eviction_lock(vm);
997 if (vm->evicting) {
998 r = -EBUSY;
999 goto error_free;
1000 }
1001
1002 if (!unlocked && !dma_fence_is_signaled(vm->last_unlocked)) {
1003 struct dma_fence *tmp = dma_fence_get_stub();
1004
1005 amdgpu_bo_fence(vm->root.bo, vm->last_unlocked, true);
1006 swap(vm->last_unlocked, tmp);
1007 dma_fence_put(tmp);
1008 }
1009
1010 r = vm->update_funcs->prepare(¶ms, sync);
1011 if (r)
1012 goto error_free;
1013
1014 amdgpu_res_first(pages_addr ? NULL : res, offset,
1015 (last - start + 1) * AMDGPU_GPU_PAGE_SIZE, &cursor);
1016 while (cursor.remaining) {
1017 uint64_t tmp, num_entries, addr;
1018
1019 num_entries = cursor.size >> AMDGPU_GPU_PAGE_SHIFT;
1020 if (pages_addr) {
1021 bool contiguous = true;
1022
1023 if (num_entries > AMDGPU_GPU_PAGES_IN_CPU_PAGE) {
1024 uint64_t pfn = cursor.start >> PAGE_SHIFT;
1025 uint64_t count;
1026
1027 contiguous = pages_addr[pfn + 1] ==
1028 pages_addr[pfn] + PAGE_SIZE;
1029
1030 tmp = num_entries /
1031 AMDGPU_GPU_PAGES_IN_CPU_PAGE;
1032 for (count = 2; count < tmp; ++count) {
1033 uint64_t idx = pfn + count;
1034
1035 if (contiguous != (pages_addr[idx] ==
1036 pages_addr[idx - 1] + PAGE_SIZE))
1037 break;
1038 }
1039 if (!contiguous)
1040 count--;
1041 num_entries = count *
1042 AMDGPU_GPU_PAGES_IN_CPU_PAGE;
1043 }
1044
1045 if (!contiguous) {
1046 addr = cursor.start;
1047 params.pages_addr = pages_addr;
1048 } else {
1049 addr = pages_addr[cursor.start >> PAGE_SHIFT];
1050 params.pages_addr = NULL;
1051 }
1052
1053 } else if (flags & (AMDGPU_PTE_VALID | AMDGPU_PTE_PRT_FLAG(adev))) {
1054 addr = vram_base + cursor.start;
1055 } else {
1056 addr = 0;
1057 }
1058
1059 tmp = start + num_entries;
1060 r = amdgpu_vm_ptes_update(¶ms, start, tmp, addr, flags);
1061 if (r)
1062 goto error_free;
1063
1064 amdgpu_res_next(&cursor, num_entries * AMDGPU_GPU_PAGE_SIZE);
1065 start = tmp;
1066 }
1067
1068 r = vm->update_funcs->commit(¶ms, fence);
1069 if (r)
1070 goto error_free;
1071
1072 if (params.needs_flush) {
1073 amdgpu_vm_tlb_flush(¶ms, fence, tlb_cb);
1074 tlb_cb = NULL;
1075 }
1076
1077 amdgpu_vm_pt_free_list(adev, ¶ms);
1078
1079error_free:
1080 kfree(tlb_cb);
1081 amdgpu_vm_eviction_unlock(vm);
1082 drm_dev_exit(idx);
1083 return r;
1084}
1085
1086static void amdgpu_vm_bo_get_memory(struct amdgpu_bo_va *bo_va,
1087 struct amdgpu_mem_stats *stats,
1088 unsigned int size)
1089{
1090 struct amdgpu_vm *vm = bo_va->base.vm;
1091 struct amdgpu_bo *bo = bo_va->base.bo;
1092
1093 if (!bo)
1094 return;
1095
1096 /*
1097 * For now ignore BOs which are currently locked and potentially
1098 * changing their location.
1099 */
1100 if (!amdgpu_vm_is_bo_always_valid(vm, bo) &&
1101 !dma_resv_trylock(bo->tbo.base.resv))
1102 return;
1103
1104 amdgpu_bo_get_memory(bo, stats, size);
1105 if (!amdgpu_vm_is_bo_always_valid(vm, bo))
1106 dma_resv_unlock(bo->tbo.base.resv);
1107}
1108
1109void amdgpu_vm_get_memory(struct amdgpu_vm *vm,
1110 struct amdgpu_mem_stats *stats,
1111 unsigned int size)
1112{
1113 struct amdgpu_bo_va *bo_va, *tmp;
1114
1115 spin_lock(&vm->status_lock);
1116 list_for_each_entry_safe(bo_va, tmp, &vm->idle, base.vm_status)
1117 amdgpu_vm_bo_get_memory(bo_va, stats, size);
1118
1119 list_for_each_entry_safe(bo_va, tmp, &vm->evicted, base.vm_status)
1120 amdgpu_vm_bo_get_memory(bo_va, stats, size);
1121
1122 list_for_each_entry_safe(bo_va, tmp, &vm->relocated, base.vm_status)
1123 amdgpu_vm_bo_get_memory(bo_va, stats, size);
1124
1125 list_for_each_entry_safe(bo_va, tmp, &vm->moved, base.vm_status)
1126 amdgpu_vm_bo_get_memory(bo_va, stats, size);
1127
1128 list_for_each_entry_safe(bo_va, tmp, &vm->invalidated, base.vm_status)
1129 amdgpu_vm_bo_get_memory(bo_va, stats, size);
1130
1131 list_for_each_entry_safe(bo_va, tmp, &vm->done, base.vm_status)
1132 amdgpu_vm_bo_get_memory(bo_va, stats, size);
1133 spin_unlock(&vm->status_lock);
1134}
1135
1136/**
1137 * amdgpu_vm_bo_update - update all BO mappings in the vm page table
1138 *
1139 * @adev: amdgpu_device pointer
1140 * @bo_va: requested BO and VM object
1141 * @clear: if true clear the entries
1142 *
1143 * Fill in the page table entries for @bo_va.
1144 *
1145 * Returns:
1146 * 0 for success, -EINVAL for failure.
1147 */
1148int amdgpu_vm_bo_update(struct amdgpu_device *adev, struct amdgpu_bo_va *bo_va,
1149 bool clear)
1150{
1151 struct amdgpu_bo *bo = bo_va->base.bo;
1152 struct amdgpu_vm *vm = bo_va->base.vm;
1153 struct amdgpu_bo_va_mapping *mapping;
1154 struct dma_fence **last_update;
1155 dma_addr_t *pages_addr = NULL;
1156 struct ttm_resource *mem;
1157 struct amdgpu_sync sync;
1158 bool flush_tlb = clear;
1159 uint64_t vram_base;
1160 uint64_t flags;
1161 bool uncached;
1162 int r;
1163
1164 amdgpu_sync_create(&sync);
1165 if (clear) {
1166 mem = NULL;
1167
1168 /* Implicitly sync to command submissions in the same VM before
1169 * unmapping.
1170 */
1171 r = amdgpu_sync_resv(adev, &sync, vm->root.bo->tbo.base.resv,
1172 AMDGPU_SYNC_EQ_OWNER, vm);
1173 if (r)
1174 goto error_free;
1175 if (bo) {
1176 r = amdgpu_sync_kfd(&sync, bo->tbo.base.resv);
1177 if (r)
1178 goto error_free;
1179 }
1180 } else if (!bo) {
1181 mem = NULL;
1182
1183 /* PRT map operations don't need to sync to anything. */
1184
1185 } else {
1186 struct drm_gem_object *obj = &bo->tbo.base;
1187
1188 if (obj->import_attach && bo_va->is_xgmi) {
1189 struct dma_buf *dma_buf = obj->import_attach->dmabuf;
1190 struct drm_gem_object *gobj = dma_buf->priv;
1191 struct amdgpu_bo *abo = gem_to_amdgpu_bo(gobj);
1192
1193 if (abo->tbo.resource &&
1194 abo->tbo.resource->mem_type == TTM_PL_VRAM)
1195 bo = gem_to_amdgpu_bo(gobj);
1196 }
1197 mem = bo->tbo.resource;
1198 if (mem && (mem->mem_type == TTM_PL_TT ||
1199 mem->mem_type == AMDGPU_PL_PREEMPT))
1200 pages_addr = bo->tbo.ttm->dma_address;
1201
1202 /* Implicitly sync to moving fences before mapping anything */
1203 r = amdgpu_sync_resv(adev, &sync, bo->tbo.base.resv,
1204 AMDGPU_SYNC_EXPLICIT, vm);
1205 if (r)
1206 goto error_free;
1207 }
1208
1209 if (bo) {
1210 struct amdgpu_device *bo_adev;
1211
1212 flags = amdgpu_ttm_tt_pte_flags(adev, bo->tbo.ttm, mem);
1213
1214 if (amdgpu_bo_encrypted(bo))
1215 flags |= AMDGPU_PTE_TMZ;
1216
1217 bo_adev = amdgpu_ttm_adev(bo->tbo.bdev);
1218 vram_base = bo_adev->vm_manager.vram_base_offset;
1219 uncached = (bo->flags & AMDGPU_GEM_CREATE_UNCACHED) != 0;
1220 } else {
1221 flags = 0x0;
1222 vram_base = 0;
1223 uncached = false;
1224 }
1225
1226 if (clear || amdgpu_vm_is_bo_always_valid(vm, bo))
1227 last_update = &vm->last_update;
1228 else
1229 last_update = &bo_va->last_pt_update;
1230
1231 if (!clear && bo_va->base.moved) {
1232 flush_tlb = true;
1233 list_splice_init(&bo_va->valids, &bo_va->invalids);
1234
1235 } else if (bo_va->cleared != clear) {
1236 list_splice_init(&bo_va->valids, &bo_va->invalids);
1237 }
1238
1239 list_for_each_entry(mapping, &bo_va->invalids, list) {
1240 uint64_t update_flags = flags;
1241
1242 /* normally,bo_va->flags only contians READABLE and WIRTEABLE bit go here
1243 * but in case of something, we filter the flags in first place
1244 */
1245 if (!(mapping->flags & AMDGPU_PTE_READABLE))
1246 update_flags &= ~AMDGPU_PTE_READABLE;
1247 if (!(mapping->flags & AMDGPU_PTE_WRITEABLE))
1248 update_flags &= ~AMDGPU_PTE_WRITEABLE;
1249
1250 /* Apply ASIC specific mapping flags */
1251 amdgpu_gmc_get_vm_pte(adev, mapping, &update_flags);
1252
1253 trace_amdgpu_vm_bo_update(mapping);
1254
1255 r = amdgpu_vm_update_range(adev, vm, false, false, flush_tlb,
1256 !uncached, &sync, mapping->start,
1257 mapping->last, update_flags,
1258 mapping->offset, vram_base, mem,
1259 pages_addr, last_update);
1260 if (r)
1261 goto error_free;
1262 }
1263
1264 /* If the BO is not in its preferred location add it back to
1265 * the evicted list so that it gets validated again on the
1266 * next command submission.
1267 */
1268 if (amdgpu_vm_is_bo_always_valid(vm, bo)) {
1269 if (bo->tbo.resource &&
1270 !(bo->preferred_domains &
1271 amdgpu_mem_type_to_domain(bo->tbo.resource->mem_type)))
1272 amdgpu_vm_bo_evicted(&bo_va->base);
1273 else
1274 amdgpu_vm_bo_idle(&bo_va->base);
1275 } else {
1276 amdgpu_vm_bo_done(&bo_va->base);
1277 }
1278
1279 list_splice_init(&bo_va->invalids, &bo_va->valids);
1280 bo_va->cleared = clear;
1281 bo_va->base.moved = false;
1282
1283 if (trace_amdgpu_vm_bo_mapping_enabled()) {
1284 list_for_each_entry(mapping, &bo_va->valids, list)
1285 trace_amdgpu_vm_bo_mapping(mapping);
1286 }
1287
1288error_free:
1289 amdgpu_sync_free(&sync);
1290 return r;
1291}
1292
1293/**
1294 * amdgpu_vm_update_prt_state - update the global PRT state
1295 *
1296 * @adev: amdgpu_device pointer
1297 */
1298static void amdgpu_vm_update_prt_state(struct amdgpu_device *adev)
1299{
1300 unsigned long flags;
1301 bool enable;
1302
1303 spin_lock_irqsave(&adev->vm_manager.prt_lock, flags);
1304 enable = !!atomic_read(&adev->vm_manager.num_prt_users);
1305 adev->gmc.gmc_funcs->set_prt(adev, enable);
1306 spin_unlock_irqrestore(&adev->vm_manager.prt_lock, flags);
1307}
1308
1309/**
1310 * amdgpu_vm_prt_get - add a PRT user
1311 *
1312 * @adev: amdgpu_device pointer
1313 */
1314static void amdgpu_vm_prt_get(struct amdgpu_device *adev)
1315{
1316 if (!adev->gmc.gmc_funcs->set_prt)
1317 return;
1318
1319 if (atomic_inc_return(&adev->vm_manager.num_prt_users) == 1)
1320 amdgpu_vm_update_prt_state(adev);
1321}
1322
1323/**
1324 * amdgpu_vm_prt_put - drop a PRT user
1325 *
1326 * @adev: amdgpu_device pointer
1327 */
1328static void amdgpu_vm_prt_put(struct amdgpu_device *adev)
1329{
1330 if (atomic_dec_return(&adev->vm_manager.num_prt_users) == 0)
1331 amdgpu_vm_update_prt_state(adev);
1332}
1333
1334/**
1335 * amdgpu_vm_prt_cb - callback for updating the PRT status
1336 *
1337 * @fence: fence for the callback
1338 * @_cb: the callback function
1339 */
1340static void amdgpu_vm_prt_cb(struct dma_fence *fence, struct dma_fence_cb *_cb)
1341{
1342 struct amdgpu_prt_cb *cb = container_of(_cb, struct amdgpu_prt_cb, cb);
1343
1344 amdgpu_vm_prt_put(cb->adev);
1345 kfree(cb);
1346}
1347
1348/**
1349 * amdgpu_vm_add_prt_cb - add callback for updating the PRT status
1350 *
1351 * @adev: amdgpu_device pointer
1352 * @fence: fence for the callback
1353 */
1354static void amdgpu_vm_add_prt_cb(struct amdgpu_device *adev,
1355 struct dma_fence *fence)
1356{
1357 struct amdgpu_prt_cb *cb;
1358
1359 if (!adev->gmc.gmc_funcs->set_prt)
1360 return;
1361
1362 cb = kmalloc(sizeof(struct amdgpu_prt_cb), GFP_KERNEL);
1363 if (!cb) {
1364 /* Last resort when we are OOM */
1365 if (fence)
1366 dma_fence_wait(fence, false);
1367
1368 amdgpu_vm_prt_put(adev);
1369 } else {
1370 cb->adev = adev;
1371 if (!fence || dma_fence_add_callback(fence, &cb->cb,
1372 amdgpu_vm_prt_cb))
1373 amdgpu_vm_prt_cb(fence, &cb->cb);
1374 }
1375}
1376
1377/**
1378 * amdgpu_vm_free_mapping - free a mapping
1379 *
1380 * @adev: amdgpu_device pointer
1381 * @vm: requested vm
1382 * @mapping: mapping to be freed
1383 * @fence: fence of the unmap operation
1384 *
1385 * Free a mapping and make sure we decrease the PRT usage count if applicable.
1386 */
1387static void amdgpu_vm_free_mapping(struct amdgpu_device *adev,
1388 struct amdgpu_vm *vm,
1389 struct amdgpu_bo_va_mapping *mapping,
1390 struct dma_fence *fence)
1391{
1392 if (mapping->flags & AMDGPU_PTE_PRT_FLAG(adev))
1393 amdgpu_vm_add_prt_cb(adev, fence);
1394 kfree(mapping);
1395}
1396
1397/**
1398 * amdgpu_vm_prt_fini - finish all prt mappings
1399 *
1400 * @adev: amdgpu_device pointer
1401 * @vm: requested vm
1402 *
1403 * Register a cleanup callback to disable PRT support after VM dies.
1404 */
1405static void amdgpu_vm_prt_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm)
1406{
1407 struct dma_resv *resv = vm->root.bo->tbo.base.resv;
1408 struct dma_resv_iter cursor;
1409 struct dma_fence *fence;
1410
1411 dma_resv_for_each_fence(&cursor, resv, DMA_RESV_USAGE_BOOKKEEP, fence) {
1412 /* Add a callback for each fence in the reservation object */
1413 amdgpu_vm_prt_get(adev);
1414 amdgpu_vm_add_prt_cb(adev, fence);
1415 }
1416}
1417
1418/**
1419 * amdgpu_vm_clear_freed - clear freed BOs in the PT
1420 *
1421 * @adev: amdgpu_device pointer
1422 * @vm: requested vm
1423 * @fence: optional resulting fence (unchanged if no work needed to be done
1424 * or if an error occurred)
1425 *
1426 * Make sure all freed BOs are cleared in the PT.
1427 * PTs have to be reserved and mutex must be locked!
1428 *
1429 * Returns:
1430 * 0 for success.
1431 *
1432 */
1433int amdgpu_vm_clear_freed(struct amdgpu_device *adev,
1434 struct amdgpu_vm *vm,
1435 struct dma_fence **fence)
1436{
1437 struct amdgpu_bo_va_mapping *mapping;
1438 struct dma_fence *f = NULL;
1439 struct amdgpu_sync sync;
1440 int r;
1441
1442
1443 /*
1444 * Implicitly sync to command submissions in the same VM before
1445 * unmapping.
1446 */
1447 amdgpu_sync_create(&sync);
1448 r = amdgpu_sync_resv(adev, &sync, vm->root.bo->tbo.base.resv,
1449 AMDGPU_SYNC_EQ_OWNER, vm);
1450 if (r)
1451 goto error_free;
1452
1453 while (!list_empty(&vm->freed)) {
1454 mapping = list_first_entry(&vm->freed,
1455 struct amdgpu_bo_va_mapping, list);
1456 list_del(&mapping->list);
1457
1458 r = amdgpu_vm_update_range(adev, vm, false, false, true, false,
1459 &sync, mapping->start, mapping->last,
1460 0, 0, 0, NULL, NULL, &f);
1461 amdgpu_vm_free_mapping(adev, vm, mapping, f);
1462 if (r) {
1463 dma_fence_put(f);
1464 goto error_free;
1465 }
1466 }
1467
1468 if (fence && f) {
1469 dma_fence_put(*fence);
1470 *fence = f;
1471 } else {
1472 dma_fence_put(f);
1473 }
1474
1475error_free:
1476 amdgpu_sync_free(&sync);
1477 return r;
1478
1479}
1480
1481/**
1482 * amdgpu_vm_handle_moved - handle moved BOs in the PT
1483 *
1484 * @adev: amdgpu_device pointer
1485 * @vm: requested vm
1486 * @ticket: optional reservation ticket used to reserve the VM
1487 *
1488 * Make sure all BOs which are moved are updated in the PTs.
1489 *
1490 * Returns:
1491 * 0 for success.
1492 *
1493 * PTs have to be reserved!
1494 */
1495int amdgpu_vm_handle_moved(struct amdgpu_device *adev,
1496 struct amdgpu_vm *vm,
1497 struct ww_acquire_ctx *ticket)
1498{
1499 struct amdgpu_bo_va *bo_va;
1500 struct dma_resv *resv;
1501 bool clear, unlock;
1502 int r;
1503
1504 spin_lock(&vm->status_lock);
1505 while (!list_empty(&vm->moved)) {
1506 bo_va = list_first_entry(&vm->moved, struct amdgpu_bo_va,
1507 base.vm_status);
1508 spin_unlock(&vm->status_lock);
1509
1510 /* Per VM BOs never need to bo cleared in the page tables */
1511 r = amdgpu_vm_bo_update(adev, bo_va, false);
1512 if (r)
1513 return r;
1514 spin_lock(&vm->status_lock);
1515 }
1516
1517 while (!list_empty(&vm->invalidated)) {
1518 bo_va = list_first_entry(&vm->invalidated, struct amdgpu_bo_va,
1519 base.vm_status);
1520 resv = bo_va->base.bo->tbo.base.resv;
1521 spin_unlock(&vm->status_lock);
1522
1523 /* Try to reserve the BO to avoid clearing its ptes */
1524 if (!adev->debug_vm && dma_resv_trylock(resv)) {
1525 clear = false;
1526 unlock = true;
1527 /* The caller is already holding the reservation lock */
1528 } else if (ticket && dma_resv_locking_ctx(resv) == ticket) {
1529 clear = false;
1530 unlock = false;
1531 /* Somebody else is using the BO right now */
1532 } else {
1533 clear = true;
1534 unlock = false;
1535 }
1536
1537 r = amdgpu_vm_bo_update(adev, bo_va, clear);
1538
1539 if (unlock)
1540 dma_resv_unlock(resv);
1541 if (r)
1542 return r;
1543
1544 /* Remember evicted DMABuf imports in compute VMs for later
1545 * validation
1546 */
1547 if (vm->is_compute_context &&
1548 bo_va->base.bo->tbo.base.import_attach &&
1549 (!bo_va->base.bo->tbo.resource ||
1550 bo_va->base.bo->tbo.resource->mem_type == TTM_PL_SYSTEM))
1551 amdgpu_vm_bo_evicted_user(&bo_va->base);
1552
1553 spin_lock(&vm->status_lock);
1554 }
1555 spin_unlock(&vm->status_lock);
1556
1557 return 0;
1558}
1559
1560/**
1561 * amdgpu_vm_flush_compute_tlb - Flush TLB on compute VM
1562 *
1563 * @adev: amdgpu_device pointer
1564 * @vm: requested vm
1565 * @flush_type: flush type
1566 * @xcc_mask: mask of XCCs that belong to the compute partition in need of a TLB flush.
1567 *
1568 * Flush TLB if needed for a compute VM.
1569 *
1570 * Returns:
1571 * 0 for success.
1572 */
1573int amdgpu_vm_flush_compute_tlb(struct amdgpu_device *adev,
1574 struct amdgpu_vm *vm,
1575 uint32_t flush_type,
1576 uint32_t xcc_mask)
1577{
1578 uint64_t tlb_seq = amdgpu_vm_tlb_seq(vm);
1579 bool all_hub = false;
1580 int xcc = 0, r = 0;
1581
1582 WARN_ON_ONCE(!vm->is_compute_context);
1583
1584 /*
1585 * It can be that we race and lose here, but that is extremely unlikely
1586 * and the worst thing which could happen is that we flush the changes
1587 * into the TLB once more which is harmless.
1588 */
1589 if (atomic64_xchg(&vm->kfd_last_flushed_seq, tlb_seq) == tlb_seq)
1590 return 0;
1591
1592 if (adev->family == AMDGPU_FAMILY_AI ||
1593 adev->family == AMDGPU_FAMILY_RV)
1594 all_hub = true;
1595
1596 for_each_inst(xcc, xcc_mask) {
1597 r = amdgpu_gmc_flush_gpu_tlb_pasid(adev, vm->pasid, flush_type,
1598 all_hub, xcc);
1599 if (r)
1600 break;
1601 }
1602 return r;
1603}
1604
1605/**
1606 * amdgpu_vm_bo_add - add a bo to a specific vm
1607 *
1608 * @adev: amdgpu_device pointer
1609 * @vm: requested vm
1610 * @bo: amdgpu buffer object
1611 *
1612 * Add @bo into the requested vm.
1613 * Add @bo to the list of bos associated with the vm
1614 *
1615 * Returns:
1616 * Newly added bo_va or NULL for failure
1617 *
1618 * Object has to be reserved!
1619 */
1620struct amdgpu_bo_va *amdgpu_vm_bo_add(struct amdgpu_device *adev,
1621 struct amdgpu_vm *vm,
1622 struct amdgpu_bo *bo)
1623{
1624 struct amdgpu_bo_va *bo_va;
1625
1626 bo_va = kzalloc(sizeof(struct amdgpu_bo_va), GFP_KERNEL);
1627 if (bo_va == NULL) {
1628 return NULL;
1629 }
1630 amdgpu_vm_bo_base_init(&bo_va->base, vm, bo);
1631
1632 bo_va->ref_count = 1;
1633 bo_va->last_pt_update = dma_fence_get_stub();
1634 INIT_LIST_HEAD(&bo_va->valids);
1635 INIT_LIST_HEAD(&bo_va->invalids);
1636
1637 if (!bo)
1638 return bo_va;
1639
1640 dma_resv_assert_held(bo->tbo.base.resv);
1641 if (amdgpu_dmabuf_is_xgmi_accessible(adev, bo)) {
1642 bo_va->is_xgmi = true;
1643 /* Power up XGMI if it can be potentially used */
1644 amdgpu_xgmi_set_pstate(adev, AMDGPU_XGMI_PSTATE_MAX_VEGA20);
1645 }
1646
1647 return bo_va;
1648}
1649
1650
1651/**
1652 * amdgpu_vm_bo_insert_map - insert a new mapping
1653 *
1654 * @adev: amdgpu_device pointer
1655 * @bo_va: bo_va to store the address
1656 * @mapping: the mapping to insert
1657 *
1658 * Insert a new mapping into all structures.
1659 */
1660static void amdgpu_vm_bo_insert_map(struct amdgpu_device *adev,
1661 struct amdgpu_bo_va *bo_va,
1662 struct amdgpu_bo_va_mapping *mapping)
1663{
1664 struct amdgpu_vm *vm = bo_va->base.vm;
1665 struct amdgpu_bo *bo = bo_va->base.bo;
1666
1667 mapping->bo_va = bo_va;
1668 list_add(&mapping->list, &bo_va->invalids);
1669 amdgpu_vm_it_insert(mapping, &vm->va);
1670
1671 if (mapping->flags & AMDGPU_PTE_PRT_FLAG(adev))
1672 amdgpu_vm_prt_get(adev);
1673
1674 if (amdgpu_vm_is_bo_always_valid(vm, bo) && !bo_va->base.moved)
1675 amdgpu_vm_bo_moved(&bo_va->base);
1676
1677 trace_amdgpu_vm_bo_map(bo_va, mapping);
1678}
1679
1680/* Validate operation parameters to prevent potential abuse */
1681static int amdgpu_vm_verify_parameters(struct amdgpu_device *adev,
1682 struct amdgpu_bo *bo,
1683 uint64_t saddr,
1684 uint64_t offset,
1685 uint64_t size)
1686{
1687 uint64_t tmp, lpfn;
1688
1689 if (saddr & AMDGPU_GPU_PAGE_MASK
1690 || offset & AMDGPU_GPU_PAGE_MASK
1691 || size & AMDGPU_GPU_PAGE_MASK)
1692 return -EINVAL;
1693
1694 if (check_add_overflow(saddr, size, &tmp)
1695 || check_add_overflow(offset, size, &tmp)
1696 || size == 0 /* which also leads to end < begin */)
1697 return -EINVAL;
1698
1699 /* make sure object fit at this offset */
1700 if (bo && offset + size > amdgpu_bo_size(bo))
1701 return -EINVAL;
1702
1703 /* Ensure last pfn not exceed max_pfn */
1704 lpfn = (saddr + size - 1) >> AMDGPU_GPU_PAGE_SHIFT;
1705 if (lpfn >= adev->vm_manager.max_pfn)
1706 return -EINVAL;
1707
1708 return 0;
1709}
1710
1711/**
1712 * amdgpu_vm_bo_map - map bo inside a vm
1713 *
1714 * @adev: amdgpu_device pointer
1715 * @bo_va: bo_va to store the address
1716 * @saddr: where to map the BO
1717 * @offset: requested offset in the BO
1718 * @size: BO size in bytes
1719 * @flags: attributes of pages (read/write/valid/etc.)
1720 *
1721 * Add a mapping of the BO at the specefied addr into the VM.
1722 *
1723 * Returns:
1724 * 0 for success, error for failure.
1725 *
1726 * Object has to be reserved and unreserved outside!
1727 */
1728int amdgpu_vm_bo_map(struct amdgpu_device *adev,
1729 struct amdgpu_bo_va *bo_va,
1730 uint64_t saddr, uint64_t offset,
1731 uint64_t size, uint64_t flags)
1732{
1733 struct amdgpu_bo_va_mapping *mapping, *tmp;
1734 struct amdgpu_bo *bo = bo_va->base.bo;
1735 struct amdgpu_vm *vm = bo_va->base.vm;
1736 uint64_t eaddr;
1737 int r;
1738
1739 r = amdgpu_vm_verify_parameters(adev, bo, saddr, offset, size);
1740 if (r)
1741 return r;
1742
1743 saddr /= AMDGPU_GPU_PAGE_SIZE;
1744 eaddr = saddr + (size - 1) / AMDGPU_GPU_PAGE_SIZE;
1745
1746 tmp = amdgpu_vm_it_iter_first(&vm->va, saddr, eaddr);
1747 if (tmp) {
1748 /* bo and tmp overlap, invalid addr */
1749 dev_err(adev->dev, "bo %p va 0x%010Lx-0x%010Lx conflict with "
1750 "0x%010Lx-0x%010Lx\n", bo, saddr, eaddr,
1751 tmp->start, tmp->last + 1);
1752 return -EINVAL;
1753 }
1754
1755 mapping = kmalloc(sizeof(*mapping), GFP_KERNEL);
1756 if (!mapping)
1757 return -ENOMEM;
1758
1759 mapping->start = saddr;
1760 mapping->last = eaddr;
1761 mapping->offset = offset;
1762 mapping->flags = flags;
1763
1764 amdgpu_vm_bo_insert_map(adev, bo_va, mapping);
1765
1766 return 0;
1767}
1768
1769/**
1770 * amdgpu_vm_bo_replace_map - map bo inside a vm, replacing existing mappings
1771 *
1772 * @adev: amdgpu_device pointer
1773 * @bo_va: bo_va to store the address
1774 * @saddr: where to map the BO
1775 * @offset: requested offset in the BO
1776 * @size: BO size in bytes
1777 * @flags: attributes of pages (read/write/valid/etc.)
1778 *
1779 * Add a mapping of the BO at the specefied addr into the VM. Replace existing
1780 * mappings as we do so.
1781 *
1782 * Returns:
1783 * 0 for success, error for failure.
1784 *
1785 * Object has to be reserved and unreserved outside!
1786 */
1787int amdgpu_vm_bo_replace_map(struct amdgpu_device *adev,
1788 struct amdgpu_bo_va *bo_va,
1789 uint64_t saddr, uint64_t offset,
1790 uint64_t size, uint64_t flags)
1791{
1792 struct amdgpu_bo_va_mapping *mapping;
1793 struct amdgpu_bo *bo = bo_va->base.bo;
1794 uint64_t eaddr;
1795 int r;
1796
1797 r = amdgpu_vm_verify_parameters(adev, bo, saddr, offset, size);
1798 if (r)
1799 return r;
1800
1801 /* Allocate all the needed memory */
1802 mapping = kmalloc(sizeof(*mapping), GFP_KERNEL);
1803 if (!mapping)
1804 return -ENOMEM;
1805
1806 r = amdgpu_vm_bo_clear_mappings(adev, bo_va->base.vm, saddr, size);
1807 if (r) {
1808 kfree(mapping);
1809 return r;
1810 }
1811
1812 saddr /= AMDGPU_GPU_PAGE_SIZE;
1813 eaddr = saddr + (size - 1) / AMDGPU_GPU_PAGE_SIZE;
1814
1815 mapping->start = saddr;
1816 mapping->last = eaddr;
1817 mapping->offset = offset;
1818 mapping->flags = flags;
1819
1820 amdgpu_vm_bo_insert_map(adev, bo_va, mapping);
1821
1822 return 0;
1823}
1824
1825/**
1826 * amdgpu_vm_bo_unmap - remove bo mapping from vm
1827 *
1828 * @adev: amdgpu_device pointer
1829 * @bo_va: bo_va to remove the address from
1830 * @saddr: where to the BO is mapped
1831 *
1832 * Remove a mapping of the BO at the specefied addr from the VM.
1833 *
1834 * Returns:
1835 * 0 for success, error for failure.
1836 *
1837 * Object has to be reserved and unreserved outside!
1838 */
1839int amdgpu_vm_bo_unmap(struct amdgpu_device *adev,
1840 struct amdgpu_bo_va *bo_va,
1841 uint64_t saddr)
1842{
1843 struct amdgpu_bo_va_mapping *mapping;
1844 struct amdgpu_vm *vm = bo_va->base.vm;
1845 bool valid = true;
1846
1847 saddr /= AMDGPU_GPU_PAGE_SIZE;
1848
1849 list_for_each_entry(mapping, &bo_va->valids, list) {
1850 if (mapping->start == saddr)
1851 break;
1852 }
1853
1854 if (&mapping->list == &bo_va->valids) {
1855 valid = false;
1856
1857 list_for_each_entry(mapping, &bo_va->invalids, list) {
1858 if (mapping->start == saddr)
1859 break;
1860 }
1861
1862 if (&mapping->list == &bo_va->invalids)
1863 return -ENOENT;
1864 }
1865
1866 list_del(&mapping->list);
1867 amdgpu_vm_it_remove(mapping, &vm->va);
1868 mapping->bo_va = NULL;
1869 trace_amdgpu_vm_bo_unmap(bo_va, mapping);
1870
1871 if (valid)
1872 list_add(&mapping->list, &vm->freed);
1873 else
1874 amdgpu_vm_free_mapping(adev, vm, mapping,
1875 bo_va->last_pt_update);
1876
1877 return 0;
1878}
1879
1880/**
1881 * amdgpu_vm_bo_clear_mappings - remove all mappings in a specific range
1882 *
1883 * @adev: amdgpu_device pointer
1884 * @vm: VM structure to use
1885 * @saddr: start of the range
1886 * @size: size of the range
1887 *
1888 * Remove all mappings in a range, split them as appropriate.
1889 *
1890 * Returns:
1891 * 0 for success, error for failure.
1892 */
1893int amdgpu_vm_bo_clear_mappings(struct amdgpu_device *adev,
1894 struct amdgpu_vm *vm,
1895 uint64_t saddr, uint64_t size)
1896{
1897 struct amdgpu_bo_va_mapping *before, *after, *tmp, *next;
1898 LIST_HEAD(removed);
1899 uint64_t eaddr;
1900 int r;
1901
1902 r = amdgpu_vm_verify_parameters(adev, NULL, saddr, 0, size);
1903 if (r)
1904 return r;
1905
1906 saddr /= AMDGPU_GPU_PAGE_SIZE;
1907 eaddr = saddr + (size - 1) / AMDGPU_GPU_PAGE_SIZE;
1908
1909 /* Allocate all the needed memory */
1910 before = kzalloc(sizeof(*before), GFP_KERNEL);
1911 if (!before)
1912 return -ENOMEM;
1913 INIT_LIST_HEAD(&before->list);
1914
1915 after = kzalloc(sizeof(*after), GFP_KERNEL);
1916 if (!after) {
1917 kfree(before);
1918 return -ENOMEM;
1919 }
1920 INIT_LIST_HEAD(&after->list);
1921
1922 /* Now gather all removed mappings */
1923 tmp = amdgpu_vm_it_iter_first(&vm->va, saddr, eaddr);
1924 while (tmp) {
1925 /* Remember mapping split at the start */
1926 if (tmp->start < saddr) {
1927 before->start = tmp->start;
1928 before->last = saddr - 1;
1929 before->offset = tmp->offset;
1930 before->flags = tmp->flags;
1931 before->bo_va = tmp->bo_va;
1932 list_add(&before->list, &tmp->bo_va->invalids);
1933 }
1934
1935 /* Remember mapping split at the end */
1936 if (tmp->last > eaddr) {
1937 after->start = eaddr + 1;
1938 after->last = tmp->last;
1939 after->offset = tmp->offset;
1940 after->offset += (after->start - tmp->start) << PAGE_SHIFT;
1941 after->flags = tmp->flags;
1942 after->bo_va = tmp->bo_va;
1943 list_add(&after->list, &tmp->bo_va->invalids);
1944 }
1945
1946 list_del(&tmp->list);
1947 list_add(&tmp->list, &removed);
1948
1949 tmp = amdgpu_vm_it_iter_next(tmp, saddr, eaddr);
1950 }
1951
1952 /* And free them up */
1953 list_for_each_entry_safe(tmp, next, &removed, list) {
1954 amdgpu_vm_it_remove(tmp, &vm->va);
1955 list_del(&tmp->list);
1956
1957 if (tmp->start < saddr)
1958 tmp->start = saddr;
1959 if (tmp->last > eaddr)
1960 tmp->last = eaddr;
1961
1962 tmp->bo_va = NULL;
1963 list_add(&tmp->list, &vm->freed);
1964 trace_amdgpu_vm_bo_unmap(NULL, tmp);
1965 }
1966
1967 /* Insert partial mapping before the range */
1968 if (!list_empty(&before->list)) {
1969 struct amdgpu_bo *bo = before->bo_va->base.bo;
1970
1971 amdgpu_vm_it_insert(before, &vm->va);
1972 if (before->flags & AMDGPU_PTE_PRT_FLAG(adev))
1973 amdgpu_vm_prt_get(adev);
1974
1975 if (amdgpu_vm_is_bo_always_valid(vm, bo) &&
1976 !before->bo_va->base.moved)
1977 amdgpu_vm_bo_moved(&before->bo_va->base);
1978 } else {
1979 kfree(before);
1980 }
1981
1982 /* Insert partial mapping after the range */
1983 if (!list_empty(&after->list)) {
1984 struct amdgpu_bo *bo = after->bo_va->base.bo;
1985
1986 amdgpu_vm_it_insert(after, &vm->va);
1987 if (after->flags & AMDGPU_PTE_PRT_FLAG(adev))
1988 amdgpu_vm_prt_get(adev);
1989
1990 if (amdgpu_vm_is_bo_always_valid(vm, bo) &&
1991 !after->bo_va->base.moved)
1992 amdgpu_vm_bo_moved(&after->bo_va->base);
1993 } else {
1994 kfree(after);
1995 }
1996
1997 return 0;
1998}
1999
2000/**
2001 * amdgpu_vm_bo_lookup_mapping - find mapping by address
2002 *
2003 * @vm: the requested VM
2004 * @addr: the address
2005 *
2006 * Find a mapping by it's address.
2007 *
2008 * Returns:
2009 * The amdgpu_bo_va_mapping matching for addr or NULL
2010 *
2011 */
2012struct amdgpu_bo_va_mapping *amdgpu_vm_bo_lookup_mapping(struct amdgpu_vm *vm,
2013 uint64_t addr)
2014{
2015 return amdgpu_vm_it_iter_first(&vm->va, addr, addr);
2016}
2017
2018/**
2019 * amdgpu_vm_bo_trace_cs - trace all reserved mappings
2020 *
2021 * @vm: the requested vm
2022 * @ticket: CS ticket
2023 *
2024 * Trace all mappings of BOs reserved during a command submission.
2025 */
2026void amdgpu_vm_bo_trace_cs(struct amdgpu_vm *vm, struct ww_acquire_ctx *ticket)
2027{
2028 struct amdgpu_bo_va_mapping *mapping;
2029
2030 if (!trace_amdgpu_vm_bo_cs_enabled())
2031 return;
2032
2033 for (mapping = amdgpu_vm_it_iter_first(&vm->va, 0, U64_MAX); mapping;
2034 mapping = amdgpu_vm_it_iter_next(mapping, 0, U64_MAX)) {
2035 if (mapping->bo_va && mapping->bo_va->base.bo) {
2036 struct amdgpu_bo *bo;
2037
2038 bo = mapping->bo_va->base.bo;
2039 if (dma_resv_locking_ctx(bo->tbo.base.resv) !=
2040 ticket)
2041 continue;
2042 }
2043
2044 trace_amdgpu_vm_bo_cs(mapping);
2045 }
2046}
2047
2048/**
2049 * amdgpu_vm_bo_del - remove a bo from a specific vm
2050 *
2051 * @adev: amdgpu_device pointer
2052 * @bo_va: requested bo_va
2053 *
2054 * Remove @bo_va->bo from the requested vm.
2055 *
2056 * Object have to be reserved!
2057 */
2058void amdgpu_vm_bo_del(struct amdgpu_device *adev,
2059 struct amdgpu_bo_va *bo_va)
2060{
2061 struct amdgpu_bo_va_mapping *mapping, *next;
2062 struct amdgpu_bo *bo = bo_va->base.bo;
2063 struct amdgpu_vm *vm = bo_va->base.vm;
2064 struct amdgpu_vm_bo_base **base;
2065
2066 dma_resv_assert_held(vm->root.bo->tbo.base.resv);
2067
2068 if (bo) {
2069 dma_resv_assert_held(bo->tbo.base.resv);
2070 if (amdgpu_vm_is_bo_always_valid(vm, bo))
2071 ttm_bo_set_bulk_move(&bo->tbo, NULL);
2072
2073 for (base = &bo_va->base.bo->vm_bo; *base;
2074 base = &(*base)->next) {
2075 if (*base != &bo_va->base)
2076 continue;
2077
2078 *base = bo_va->base.next;
2079 break;
2080 }
2081 }
2082
2083 spin_lock(&vm->status_lock);
2084 list_del(&bo_va->base.vm_status);
2085 spin_unlock(&vm->status_lock);
2086
2087 list_for_each_entry_safe(mapping, next, &bo_va->valids, list) {
2088 list_del(&mapping->list);
2089 amdgpu_vm_it_remove(mapping, &vm->va);
2090 mapping->bo_va = NULL;
2091 trace_amdgpu_vm_bo_unmap(bo_va, mapping);
2092 list_add(&mapping->list, &vm->freed);
2093 }
2094 list_for_each_entry_safe(mapping, next, &bo_va->invalids, list) {
2095 list_del(&mapping->list);
2096 amdgpu_vm_it_remove(mapping, &vm->va);
2097 amdgpu_vm_free_mapping(adev, vm, mapping,
2098 bo_va->last_pt_update);
2099 }
2100
2101 dma_fence_put(bo_va->last_pt_update);
2102
2103 if (bo && bo_va->is_xgmi)
2104 amdgpu_xgmi_set_pstate(adev, AMDGPU_XGMI_PSTATE_MIN);
2105
2106 kfree(bo_va);
2107}
2108
2109/**
2110 * amdgpu_vm_evictable - check if we can evict a VM
2111 *
2112 * @bo: A page table of the VM.
2113 *
2114 * Check if it is possible to evict a VM.
2115 */
2116bool amdgpu_vm_evictable(struct amdgpu_bo *bo)
2117{
2118 struct amdgpu_vm_bo_base *bo_base = bo->vm_bo;
2119
2120 /* Page tables of a destroyed VM can go away immediately */
2121 if (!bo_base || !bo_base->vm)
2122 return true;
2123
2124 /* Don't evict VM page tables while they are busy */
2125 if (!dma_resv_test_signaled(bo->tbo.base.resv, DMA_RESV_USAGE_BOOKKEEP))
2126 return false;
2127
2128 /* Try to block ongoing updates */
2129 if (!amdgpu_vm_eviction_trylock(bo_base->vm))
2130 return false;
2131
2132 /* Don't evict VM page tables while they are updated */
2133 if (!dma_fence_is_signaled(bo_base->vm->last_unlocked)) {
2134 amdgpu_vm_eviction_unlock(bo_base->vm);
2135 return false;
2136 }
2137
2138 bo_base->vm->evicting = true;
2139 amdgpu_vm_eviction_unlock(bo_base->vm);
2140 return true;
2141}
2142
2143/**
2144 * amdgpu_vm_bo_invalidate - mark the bo as invalid
2145 *
2146 * @adev: amdgpu_device pointer
2147 * @bo: amdgpu buffer object
2148 * @evicted: is the BO evicted
2149 *
2150 * Mark @bo as invalid.
2151 */
2152void amdgpu_vm_bo_invalidate(struct amdgpu_device *adev,
2153 struct amdgpu_bo *bo, bool evicted)
2154{
2155 struct amdgpu_vm_bo_base *bo_base;
2156
2157 for (bo_base = bo->vm_bo; bo_base; bo_base = bo_base->next) {
2158 struct amdgpu_vm *vm = bo_base->vm;
2159
2160 if (evicted && amdgpu_vm_is_bo_always_valid(vm, bo)) {
2161 amdgpu_vm_bo_evicted(bo_base);
2162 continue;
2163 }
2164
2165 if (bo_base->moved)
2166 continue;
2167 bo_base->moved = true;
2168
2169 if (bo->tbo.type == ttm_bo_type_kernel)
2170 amdgpu_vm_bo_relocated(bo_base);
2171 else if (amdgpu_vm_is_bo_always_valid(vm, bo))
2172 amdgpu_vm_bo_moved(bo_base);
2173 else
2174 amdgpu_vm_bo_invalidated(bo_base);
2175 }
2176}
2177
2178/**
2179 * amdgpu_vm_get_block_size - calculate VM page table size as power of two
2180 *
2181 * @vm_size: VM size
2182 *
2183 * Returns:
2184 * VM page table as power of two
2185 */
2186static uint32_t amdgpu_vm_get_block_size(uint64_t vm_size)
2187{
2188 /* Total bits covered by PD + PTs */
2189 unsigned bits = ilog2(vm_size) + 18;
2190
2191 /* Make sure the PD is 4K in size up to 8GB address space.
2192 Above that split equal between PD and PTs */
2193 if (vm_size <= 8)
2194 return (bits - 9);
2195 else
2196 return ((bits + 3) / 2);
2197}
2198
2199/**
2200 * amdgpu_vm_adjust_size - adjust vm size, block size and fragment size
2201 *
2202 * @adev: amdgpu_device pointer
2203 * @min_vm_size: the minimum vm size in GB if it's set auto
2204 * @fragment_size_default: Default PTE fragment size
2205 * @max_level: max VMPT level
2206 * @max_bits: max address space size in bits
2207 *
2208 */
2209void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint32_t min_vm_size,
2210 uint32_t fragment_size_default, unsigned max_level,
2211 unsigned max_bits)
2212{
2213 unsigned int max_size = 1 << (max_bits - 30);
2214 unsigned int vm_size;
2215 uint64_t tmp;
2216
2217 /* adjust vm size first */
2218 if (amdgpu_vm_size != -1) {
2219 vm_size = amdgpu_vm_size;
2220 if (vm_size > max_size) {
2221 dev_warn(adev->dev, "VM size (%d) too large, max is %u GB\n",
2222 amdgpu_vm_size, max_size);
2223 vm_size = max_size;
2224 }
2225 } else {
2226 struct sysinfo si;
2227 unsigned int phys_ram_gb;
2228
2229 /* Optimal VM size depends on the amount of physical
2230 * RAM available. Underlying requirements and
2231 * assumptions:
2232 *
2233 * - Need to map system memory and VRAM from all GPUs
2234 * - VRAM from other GPUs not known here
2235 * - Assume VRAM <= system memory
2236 * - On GFX8 and older, VM space can be segmented for
2237 * different MTYPEs
2238 * - Need to allow room for fragmentation, guard pages etc.
2239 *
2240 * This adds up to a rough guess of system memory x3.
2241 * Round up to power of two to maximize the available
2242 * VM size with the given page table size.
2243 */
2244 si_meminfo(&si);
2245 phys_ram_gb = ((uint64_t)si.totalram * si.mem_unit +
2246 (1 << 30) - 1) >> 30;
2247 vm_size = roundup_pow_of_two(
2248 clamp(phys_ram_gb * 3, min_vm_size, max_size));
2249 }
2250
2251 adev->vm_manager.max_pfn = (uint64_t)vm_size << 18;
2252
2253 tmp = roundup_pow_of_two(adev->vm_manager.max_pfn);
2254 if (amdgpu_vm_block_size != -1)
2255 tmp >>= amdgpu_vm_block_size - 9;
2256 tmp = DIV_ROUND_UP(fls64(tmp) - 1, 9) - 1;
2257 adev->vm_manager.num_level = min_t(unsigned int, max_level, tmp);
2258 switch (adev->vm_manager.num_level) {
2259 case 3:
2260 adev->vm_manager.root_level = AMDGPU_VM_PDB2;
2261 break;
2262 case 2:
2263 adev->vm_manager.root_level = AMDGPU_VM_PDB1;
2264 break;
2265 case 1:
2266 adev->vm_manager.root_level = AMDGPU_VM_PDB0;
2267 break;
2268 default:
2269 dev_err(adev->dev, "VMPT only supports 2~4+1 levels\n");
2270 }
2271 /* block size depends on vm size and hw setup*/
2272 if (amdgpu_vm_block_size != -1)
2273 adev->vm_manager.block_size =
2274 min((unsigned)amdgpu_vm_block_size, max_bits
2275 - AMDGPU_GPU_PAGE_SHIFT
2276 - 9 * adev->vm_manager.num_level);
2277 else if (adev->vm_manager.num_level > 1)
2278 adev->vm_manager.block_size = 9;
2279 else
2280 adev->vm_manager.block_size = amdgpu_vm_get_block_size(tmp);
2281
2282 if (amdgpu_vm_fragment_size == -1)
2283 adev->vm_manager.fragment_size = fragment_size_default;
2284 else
2285 adev->vm_manager.fragment_size = amdgpu_vm_fragment_size;
2286
2287 DRM_INFO("vm size is %u GB, %u levels, block size is %u-bit, fragment size is %u-bit\n",
2288 vm_size, adev->vm_manager.num_level + 1,
2289 adev->vm_manager.block_size,
2290 adev->vm_manager.fragment_size);
2291}
2292
2293/**
2294 * amdgpu_vm_wait_idle - wait for the VM to become idle
2295 *
2296 * @vm: VM object to wait for
2297 * @timeout: timeout to wait for VM to become idle
2298 */
2299long amdgpu_vm_wait_idle(struct amdgpu_vm *vm, long timeout)
2300{
2301 timeout = dma_resv_wait_timeout(vm->root.bo->tbo.base.resv,
2302 DMA_RESV_USAGE_BOOKKEEP,
2303 true, timeout);
2304 if (timeout <= 0)
2305 return timeout;
2306
2307 return dma_fence_wait_timeout(vm->last_unlocked, true, timeout);
2308}
2309
2310static void amdgpu_vm_destroy_task_info(struct kref *kref)
2311{
2312 struct amdgpu_task_info *ti = container_of(kref, struct amdgpu_task_info, refcount);
2313
2314 kfree(ti);
2315}
2316
2317static inline struct amdgpu_vm *
2318amdgpu_vm_get_vm_from_pasid(struct amdgpu_device *adev, u32 pasid)
2319{
2320 struct amdgpu_vm *vm;
2321 unsigned long flags;
2322
2323 xa_lock_irqsave(&adev->vm_manager.pasids, flags);
2324 vm = xa_load(&adev->vm_manager.pasids, pasid);
2325 xa_unlock_irqrestore(&adev->vm_manager.pasids, flags);
2326
2327 return vm;
2328}
2329
2330/**
2331 * amdgpu_vm_put_task_info - reference down the vm task_info ptr
2332 *
2333 * @task_info: task_info struct under discussion.
2334 *
2335 * frees the vm task_info ptr at the last put
2336 */
2337void amdgpu_vm_put_task_info(struct amdgpu_task_info *task_info)
2338{
2339 kref_put(&task_info->refcount, amdgpu_vm_destroy_task_info);
2340}
2341
2342/**
2343 * amdgpu_vm_get_task_info_vm - Extracts task info for a vm.
2344 *
2345 * @vm: VM to get info from
2346 *
2347 * Returns the reference counted task_info structure, which must be
2348 * referenced down with amdgpu_vm_put_task_info.
2349 */
2350struct amdgpu_task_info *
2351amdgpu_vm_get_task_info_vm(struct amdgpu_vm *vm)
2352{
2353 struct amdgpu_task_info *ti = NULL;
2354
2355 if (vm) {
2356 ti = vm->task_info;
2357 kref_get(&vm->task_info->refcount);
2358 }
2359
2360 return ti;
2361}
2362
2363/**
2364 * amdgpu_vm_get_task_info_pasid - Extracts task info for a PASID.
2365 *
2366 * @adev: drm device pointer
2367 * @pasid: PASID identifier for VM
2368 *
2369 * Returns the reference counted task_info structure, which must be
2370 * referenced down with amdgpu_vm_put_task_info.
2371 */
2372struct amdgpu_task_info *
2373amdgpu_vm_get_task_info_pasid(struct amdgpu_device *adev, u32 pasid)
2374{
2375 return amdgpu_vm_get_task_info_vm(
2376 amdgpu_vm_get_vm_from_pasid(adev, pasid));
2377}
2378
2379static int amdgpu_vm_create_task_info(struct amdgpu_vm *vm)
2380{
2381 vm->task_info = kzalloc(sizeof(struct amdgpu_task_info), GFP_KERNEL);
2382 if (!vm->task_info)
2383 return -ENOMEM;
2384
2385 kref_init(&vm->task_info->refcount);
2386 return 0;
2387}
2388
2389/**
2390 * amdgpu_vm_set_task_info - Sets VMs task info.
2391 *
2392 * @vm: vm for which to set the info
2393 */
2394void amdgpu_vm_set_task_info(struct amdgpu_vm *vm)
2395{
2396 if (!vm->task_info)
2397 return;
2398
2399 if (vm->task_info->pid == current->pid)
2400 return;
2401
2402 vm->task_info->pid = current->pid;
2403 get_task_comm(vm->task_info->task_name, current);
2404
2405 if (current->group_leader->mm != current->mm)
2406 return;
2407
2408 vm->task_info->tgid = current->group_leader->pid;
2409 get_task_comm(vm->task_info->process_name, current->group_leader);
2410}
2411
2412/**
2413 * amdgpu_vm_init - initialize a vm instance
2414 *
2415 * @adev: amdgpu_device pointer
2416 * @vm: requested vm
2417 * @xcp_id: GPU partition selection id
2418 *
2419 * Init @vm fields.
2420 *
2421 * Returns:
2422 * 0 for success, error for failure.
2423 */
2424int amdgpu_vm_init(struct amdgpu_device *adev, struct amdgpu_vm *vm,
2425 int32_t xcp_id)
2426{
2427 struct amdgpu_bo *root_bo;
2428 struct amdgpu_bo_vm *root;
2429 int r, i;
2430
2431 vm->va = RB_ROOT_CACHED;
2432 for (i = 0; i < AMDGPU_MAX_VMHUBS; i++)
2433 vm->reserved_vmid[i] = NULL;
2434 INIT_LIST_HEAD(&vm->evicted);
2435 INIT_LIST_HEAD(&vm->evicted_user);
2436 INIT_LIST_HEAD(&vm->relocated);
2437 INIT_LIST_HEAD(&vm->moved);
2438 INIT_LIST_HEAD(&vm->idle);
2439 INIT_LIST_HEAD(&vm->invalidated);
2440 spin_lock_init(&vm->status_lock);
2441 INIT_LIST_HEAD(&vm->freed);
2442 INIT_LIST_HEAD(&vm->done);
2443 INIT_LIST_HEAD(&vm->pt_freed);
2444 INIT_WORK(&vm->pt_free_work, amdgpu_vm_pt_free_work);
2445 INIT_KFIFO(vm->faults);
2446
2447 r = amdgpu_vm_init_entities(adev, vm);
2448 if (r)
2449 return r;
2450
2451 ttm_lru_bulk_move_init(&vm->lru_bulk_move);
2452
2453 vm->is_compute_context = false;
2454
2455 vm->use_cpu_for_update = !!(adev->vm_manager.vm_update_mode &
2456 AMDGPU_VM_USE_CPU_FOR_GFX);
2457
2458 DRM_DEBUG_DRIVER("VM update mode is %s\n",
2459 vm->use_cpu_for_update ? "CPU" : "SDMA");
2460 WARN_ONCE((vm->use_cpu_for_update &&
2461 !amdgpu_gmc_vram_full_visible(&adev->gmc)),
2462 "CPU update of VM recommended only for large BAR system\n");
2463
2464 if (vm->use_cpu_for_update)
2465 vm->update_funcs = &amdgpu_vm_cpu_funcs;
2466 else
2467 vm->update_funcs = &amdgpu_vm_sdma_funcs;
2468
2469 vm->last_update = dma_fence_get_stub();
2470 vm->last_unlocked = dma_fence_get_stub();
2471 vm->last_tlb_flush = dma_fence_get_stub();
2472 vm->generation = amdgpu_vm_generation(adev, NULL);
2473
2474 mutex_init(&vm->eviction_lock);
2475 vm->evicting = false;
2476 vm->tlb_fence_context = dma_fence_context_alloc(1);
2477
2478 r = amdgpu_vm_pt_create(adev, vm, adev->vm_manager.root_level,
2479 false, &root, xcp_id);
2480 if (r)
2481 goto error_free_delayed;
2482
2483 root_bo = amdgpu_bo_ref(&root->bo);
2484 r = amdgpu_bo_reserve(root_bo, true);
2485 if (r) {
2486 amdgpu_bo_unref(&root_bo);
2487 goto error_free_delayed;
2488 }
2489
2490 amdgpu_vm_bo_base_init(&vm->root, vm, root_bo);
2491 r = dma_resv_reserve_fences(root_bo->tbo.base.resv, 1);
2492 if (r)
2493 goto error_free_root;
2494
2495 r = amdgpu_vm_pt_clear(adev, vm, root, false);
2496 if (r)
2497 goto error_free_root;
2498
2499 r = amdgpu_vm_create_task_info(vm);
2500 if (r)
2501 DRM_DEBUG("Failed to create task info for VM\n");
2502
2503 amdgpu_bo_unreserve(vm->root.bo);
2504 amdgpu_bo_unref(&root_bo);
2505
2506 return 0;
2507
2508error_free_root:
2509 amdgpu_vm_pt_free_root(adev, vm);
2510 amdgpu_bo_unreserve(vm->root.bo);
2511 amdgpu_bo_unref(&root_bo);
2512
2513error_free_delayed:
2514 dma_fence_put(vm->last_tlb_flush);
2515 dma_fence_put(vm->last_unlocked);
2516 ttm_lru_bulk_move_fini(&adev->mman.bdev, &vm->lru_bulk_move);
2517 amdgpu_vm_fini_entities(vm);
2518
2519 return r;
2520}
2521
2522/**
2523 * amdgpu_vm_make_compute - Turn a GFX VM into a compute VM
2524 *
2525 * @adev: amdgpu_device pointer
2526 * @vm: requested vm
2527 *
2528 * This only works on GFX VMs that don't have any BOs added and no
2529 * page tables allocated yet.
2530 *
2531 * Changes the following VM parameters:
2532 * - use_cpu_for_update
2533 * - pte_supports_ats
2534 *
2535 * Reinitializes the page directory to reflect the changed ATS
2536 * setting.
2537 *
2538 * Returns:
2539 * 0 for success, -errno for errors.
2540 */
2541int amdgpu_vm_make_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm)
2542{
2543 int r;
2544
2545 r = amdgpu_bo_reserve(vm->root.bo, true);
2546 if (r)
2547 return r;
2548
2549 /* Update VM state */
2550 vm->use_cpu_for_update = !!(adev->vm_manager.vm_update_mode &
2551 AMDGPU_VM_USE_CPU_FOR_COMPUTE);
2552 DRM_DEBUG_DRIVER("VM update mode is %s\n",
2553 vm->use_cpu_for_update ? "CPU" : "SDMA");
2554 WARN_ONCE((vm->use_cpu_for_update &&
2555 !amdgpu_gmc_vram_full_visible(&adev->gmc)),
2556 "CPU update of VM recommended only for large BAR system\n");
2557
2558 if (vm->use_cpu_for_update) {
2559 /* Sync with last SDMA update/clear before switching to CPU */
2560 r = amdgpu_bo_sync_wait(vm->root.bo,
2561 AMDGPU_FENCE_OWNER_UNDEFINED, true);
2562 if (r)
2563 goto unreserve_bo;
2564
2565 vm->update_funcs = &amdgpu_vm_cpu_funcs;
2566 r = amdgpu_vm_pt_map_tables(adev, vm);
2567 if (r)
2568 goto unreserve_bo;
2569
2570 } else {
2571 vm->update_funcs = &amdgpu_vm_sdma_funcs;
2572 }
2573
2574 dma_fence_put(vm->last_update);
2575 vm->last_update = dma_fence_get_stub();
2576 vm->is_compute_context = true;
2577
2578unreserve_bo:
2579 amdgpu_bo_unreserve(vm->root.bo);
2580 return r;
2581}
2582
2583/**
2584 * amdgpu_vm_release_compute - release a compute vm
2585 * @adev: amdgpu_device pointer
2586 * @vm: a vm turned into compute vm by calling amdgpu_vm_make_compute
2587 *
2588 * This is a correspondant of amdgpu_vm_make_compute. It decouples compute
2589 * pasid from vm. Compute should stop use of vm after this call.
2590 */
2591void amdgpu_vm_release_compute(struct amdgpu_device *adev, struct amdgpu_vm *vm)
2592{
2593 amdgpu_vm_set_pasid(adev, vm, 0);
2594 vm->is_compute_context = false;
2595}
2596
2597/**
2598 * amdgpu_vm_fini - tear down a vm instance
2599 *
2600 * @adev: amdgpu_device pointer
2601 * @vm: requested vm
2602 *
2603 * Tear down @vm.
2604 * Unbind the VM and remove all bos from the vm bo list
2605 */
2606void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm)
2607{
2608 struct amdgpu_bo_va_mapping *mapping, *tmp;
2609 bool prt_fini_needed = !!adev->gmc.gmc_funcs->set_prt;
2610 struct amdgpu_bo *root;
2611 unsigned long flags;
2612 int i;
2613
2614 amdgpu_amdkfd_gpuvm_destroy_cb(adev, vm);
2615
2616 flush_work(&vm->pt_free_work);
2617
2618 root = amdgpu_bo_ref(vm->root.bo);
2619 amdgpu_bo_reserve(root, true);
2620 amdgpu_vm_put_task_info(vm->task_info);
2621 amdgpu_vm_set_pasid(adev, vm, 0);
2622 dma_fence_wait(vm->last_unlocked, false);
2623 dma_fence_put(vm->last_unlocked);
2624 dma_fence_wait(vm->last_tlb_flush, false);
2625 /* Make sure that all fence callbacks have completed */
2626 spin_lock_irqsave(vm->last_tlb_flush->lock, flags);
2627 spin_unlock_irqrestore(vm->last_tlb_flush->lock, flags);
2628 dma_fence_put(vm->last_tlb_flush);
2629
2630 list_for_each_entry_safe(mapping, tmp, &vm->freed, list) {
2631 if (mapping->flags & AMDGPU_PTE_PRT_FLAG(adev) && prt_fini_needed) {
2632 amdgpu_vm_prt_fini(adev, vm);
2633 prt_fini_needed = false;
2634 }
2635
2636 list_del(&mapping->list);
2637 amdgpu_vm_free_mapping(adev, vm, mapping, NULL);
2638 }
2639
2640 amdgpu_vm_pt_free_root(adev, vm);
2641 amdgpu_bo_unreserve(root);
2642 amdgpu_bo_unref(&root);
2643 WARN_ON(vm->root.bo);
2644
2645 amdgpu_vm_fini_entities(vm);
2646
2647 if (!RB_EMPTY_ROOT(&vm->va.rb_root)) {
2648 dev_err(adev->dev, "still active bo inside vm\n");
2649 }
2650 rbtree_postorder_for_each_entry_safe(mapping, tmp,
2651 &vm->va.rb_root, rb) {
2652 /* Don't remove the mapping here, we don't want to trigger a
2653 * rebalance and the tree is about to be destroyed anyway.
2654 */
2655 list_del(&mapping->list);
2656 kfree(mapping);
2657 }
2658
2659 dma_fence_put(vm->last_update);
2660
2661 for (i = 0; i < AMDGPU_MAX_VMHUBS; i++) {
2662 if (vm->reserved_vmid[i]) {
2663 amdgpu_vmid_free_reserved(adev, i);
2664 vm->reserved_vmid[i] = false;
2665 }
2666 }
2667
2668 ttm_lru_bulk_move_fini(&adev->mman.bdev, &vm->lru_bulk_move);
2669}
2670
2671/**
2672 * amdgpu_vm_manager_init - init the VM manager
2673 *
2674 * @adev: amdgpu_device pointer
2675 *
2676 * Initialize the VM manager structures
2677 */
2678void amdgpu_vm_manager_init(struct amdgpu_device *adev)
2679{
2680 unsigned i;
2681
2682 /* Concurrent flushes are only possible starting with Vega10 and
2683 * are broken on Navi10 and Navi14.
2684 */
2685 adev->vm_manager.concurrent_flush = !(adev->asic_type < CHIP_VEGA10 ||
2686 adev->asic_type == CHIP_NAVI10 ||
2687 adev->asic_type == CHIP_NAVI14);
2688 amdgpu_vmid_mgr_init(adev);
2689
2690 adev->vm_manager.fence_context =
2691 dma_fence_context_alloc(AMDGPU_MAX_RINGS);
2692 for (i = 0; i < AMDGPU_MAX_RINGS; ++i)
2693 adev->vm_manager.seqno[i] = 0;
2694
2695 spin_lock_init(&adev->vm_manager.prt_lock);
2696 atomic_set(&adev->vm_manager.num_prt_users, 0);
2697
2698 /* If not overridden by the user, by default, only in large BAR systems
2699 * Compute VM tables will be updated by CPU
2700 */
2701#ifdef CONFIG_X86_64
2702 if (amdgpu_vm_update_mode == -1) {
2703 /* For asic with VF MMIO access protection
2704 * avoid using CPU for VM table updates
2705 */
2706 if (amdgpu_gmc_vram_full_visible(&adev->gmc) &&
2707 !amdgpu_sriov_vf_mmio_access_protection(adev))
2708 adev->vm_manager.vm_update_mode =
2709 AMDGPU_VM_USE_CPU_FOR_COMPUTE;
2710 else
2711 adev->vm_manager.vm_update_mode = 0;
2712 } else
2713 adev->vm_manager.vm_update_mode = amdgpu_vm_update_mode;
2714#else
2715 adev->vm_manager.vm_update_mode = 0;
2716#endif
2717
2718 xa_init_flags(&adev->vm_manager.pasids, XA_FLAGS_LOCK_IRQ);
2719}
2720
2721/**
2722 * amdgpu_vm_manager_fini - cleanup VM manager
2723 *
2724 * @adev: amdgpu_device pointer
2725 *
2726 * Cleanup the VM manager and free resources.
2727 */
2728void amdgpu_vm_manager_fini(struct amdgpu_device *adev)
2729{
2730 WARN_ON(!xa_empty(&adev->vm_manager.pasids));
2731 xa_destroy(&adev->vm_manager.pasids);
2732
2733 amdgpu_vmid_mgr_fini(adev);
2734}
2735
2736/**
2737 * amdgpu_vm_ioctl - Manages VMID reservation for vm hubs.
2738 *
2739 * @dev: drm device pointer
2740 * @data: drm_amdgpu_vm
2741 * @filp: drm file pointer
2742 *
2743 * Returns:
2744 * 0 for success, -errno for errors.
2745 */
2746int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
2747{
2748 union drm_amdgpu_vm *args = data;
2749 struct amdgpu_device *adev = drm_to_adev(dev);
2750 struct amdgpu_fpriv *fpriv = filp->driver_priv;
2751
2752 /* No valid flags defined yet */
2753 if (args->in.flags)
2754 return -EINVAL;
2755
2756 switch (args->in.op) {
2757 case AMDGPU_VM_OP_RESERVE_VMID:
2758 /* We only have requirement to reserve vmid from gfxhub */
2759 if (!fpriv->vm.reserved_vmid[AMDGPU_GFXHUB(0)]) {
2760 amdgpu_vmid_alloc_reserved(adev, AMDGPU_GFXHUB(0));
2761 fpriv->vm.reserved_vmid[AMDGPU_GFXHUB(0)] = true;
2762 }
2763
2764 break;
2765 case AMDGPU_VM_OP_UNRESERVE_VMID:
2766 if (fpriv->vm.reserved_vmid[AMDGPU_GFXHUB(0)]) {
2767 amdgpu_vmid_free_reserved(adev, AMDGPU_GFXHUB(0));
2768 fpriv->vm.reserved_vmid[AMDGPU_GFXHUB(0)] = false;
2769 }
2770 break;
2771 default:
2772 return -EINVAL;
2773 }
2774
2775 return 0;
2776}
2777
2778/**
2779 * amdgpu_vm_handle_fault - graceful handling of VM faults.
2780 * @adev: amdgpu device pointer
2781 * @pasid: PASID of the VM
2782 * @ts: Timestamp of the fault
2783 * @vmid: VMID, only used for GFX 9.4.3.
2784 * @node_id: Node_id received in IH cookie. Only applicable for
2785 * GFX 9.4.3.
2786 * @addr: Address of the fault
2787 * @write_fault: true is write fault, false is read fault
2788 *
2789 * Try to gracefully handle a VM fault. Return true if the fault was handled and
2790 * shouldn't be reported any more.
2791 */
2792bool amdgpu_vm_handle_fault(struct amdgpu_device *adev, u32 pasid,
2793 u32 vmid, u32 node_id, uint64_t addr, uint64_t ts,
2794 bool write_fault)
2795{
2796 bool is_compute_context = false;
2797 struct amdgpu_bo *root;
2798 unsigned long irqflags;
2799 uint64_t value, flags;
2800 struct amdgpu_vm *vm;
2801 int r;
2802
2803 xa_lock_irqsave(&adev->vm_manager.pasids, irqflags);
2804 vm = xa_load(&adev->vm_manager.pasids, pasid);
2805 if (vm) {
2806 root = amdgpu_bo_ref(vm->root.bo);
2807 is_compute_context = vm->is_compute_context;
2808 } else {
2809 root = NULL;
2810 }
2811 xa_unlock_irqrestore(&adev->vm_manager.pasids, irqflags);
2812
2813 if (!root)
2814 return false;
2815
2816 addr /= AMDGPU_GPU_PAGE_SIZE;
2817
2818 if (is_compute_context && !svm_range_restore_pages(adev, pasid, vmid,
2819 node_id, addr, ts, write_fault)) {
2820 amdgpu_bo_unref(&root);
2821 return true;
2822 }
2823
2824 r = amdgpu_bo_reserve(root, true);
2825 if (r)
2826 goto error_unref;
2827
2828 /* Double check that the VM still exists */
2829 xa_lock_irqsave(&adev->vm_manager.pasids, irqflags);
2830 vm = xa_load(&adev->vm_manager.pasids, pasid);
2831 if (vm && vm->root.bo != root)
2832 vm = NULL;
2833 xa_unlock_irqrestore(&adev->vm_manager.pasids, irqflags);
2834 if (!vm)
2835 goto error_unlock;
2836
2837 flags = AMDGPU_PTE_VALID | AMDGPU_PTE_SNOOPED |
2838 AMDGPU_PTE_SYSTEM;
2839
2840 if (is_compute_context) {
2841 /* Intentionally setting invalid PTE flag
2842 * combination to force a no-retry-fault
2843 */
2844 flags = AMDGPU_VM_NORETRY_FLAGS;
2845 value = 0;
2846 } else if (amdgpu_vm_fault_stop == AMDGPU_VM_FAULT_STOP_NEVER) {
2847 /* Redirect the access to the dummy page */
2848 value = adev->dummy_page_addr;
2849 flags |= AMDGPU_PTE_EXECUTABLE | AMDGPU_PTE_READABLE |
2850 AMDGPU_PTE_WRITEABLE;
2851
2852 } else {
2853 /* Let the hw retry silently on the PTE */
2854 value = 0;
2855 }
2856
2857 r = dma_resv_reserve_fences(root->tbo.base.resv, 1);
2858 if (r) {
2859 pr_debug("failed %d to reserve fence slot\n", r);
2860 goto error_unlock;
2861 }
2862
2863 r = amdgpu_vm_update_range(adev, vm, true, false, false, false,
2864 NULL, addr, addr, flags, value, 0, NULL, NULL, NULL);
2865 if (r)
2866 goto error_unlock;
2867
2868 r = amdgpu_vm_update_pdes(adev, vm, true);
2869
2870error_unlock:
2871 amdgpu_bo_unreserve(root);
2872 if (r < 0)
2873 DRM_ERROR("Can't handle page fault (%d)\n", r);
2874
2875error_unref:
2876 amdgpu_bo_unref(&root);
2877
2878 return false;
2879}
2880
2881#if defined(CONFIG_DEBUG_FS)
2882/**
2883 * amdgpu_debugfs_vm_bo_info - print BO info for the VM
2884 *
2885 * @vm: Requested VM for printing BO info
2886 * @m: debugfs file
2887 *
2888 * Print BO information in debugfs file for the VM
2889 */
2890void amdgpu_debugfs_vm_bo_info(struct amdgpu_vm *vm, struct seq_file *m)
2891{
2892 struct amdgpu_bo_va *bo_va, *tmp;
2893 u64 total_idle = 0;
2894 u64 total_evicted = 0;
2895 u64 total_relocated = 0;
2896 u64 total_moved = 0;
2897 u64 total_invalidated = 0;
2898 u64 total_done = 0;
2899 unsigned int total_idle_objs = 0;
2900 unsigned int total_evicted_objs = 0;
2901 unsigned int total_relocated_objs = 0;
2902 unsigned int total_moved_objs = 0;
2903 unsigned int total_invalidated_objs = 0;
2904 unsigned int total_done_objs = 0;
2905 unsigned int id = 0;
2906
2907 spin_lock(&vm->status_lock);
2908 seq_puts(m, "\tIdle BOs:\n");
2909 list_for_each_entry_safe(bo_va, tmp, &vm->idle, base.vm_status) {
2910 if (!bo_va->base.bo)
2911 continue;
2912 total_idle += amdgpu_bo_print_info(id++, bo_va->base.bo, m);
2913 }
2914 total_idle_objs = id;
2915 id = 0;
2916
2917 seq_puts(m, "\tEvicted BOs:\n");
2918 list_for_each_entry_safe(bo_va, tmp, &vm->evicted, base.vm_status) {
2919 if (!bo_va->base.bo)
2920 continue;
2921 total_evicted += amdgpu_bo_print_info(id++, bo_va->base.bo, m);
2922 }
2923 total_evicted_objs = id;
2924 id = 0;
2925
2926 seq_puts(m, "\tRelocated BOs:\n");
2927 list_for_each_entry_safe(bo_va, tmp, &vm->relocated, base.vm_status) {
2928 if (!bo_va->base.bo)
2929 continue;
2930 total_relocated += amdgpu_bo_print_info(id++, bo_va->base.bo, m);
2931 }
2932 total_relocated_objs = id;
2933 id = 0;
2934
2935 seq_puts(m, "\tMoved BOs:\n");
2936 list_for_each_entry_safe(bo_va, tmp, &vm->moved, base.vm_status) {
2937 if (!bo_va->base.bo)
2938 continue;
2939 total_moved += amdgpu_bo_print_info(id++, bo_va->base.bo, m);
2940 }
2941 total_moved_objs = id;
2942 id = 0;
2943
2944 seq_puts(m, "\tInvalidated BOs:\n");
2945 list_for_each_entry_safe(bo_va, tmp, &vm->invalidated, base.vm_status) {
2946 if (!bo_va->base.bo)
2947 continue;
2948 total_invalidated += amdgpu_bo_print_info(id++, bo_va->base.bo, m);
2949 }
2950 total_invalidated_objs = id;
2951 id = 0;
2952
2953 seq_puts(m, "\tDone BOs:\n");
2954 list_for_each_entry_safe(bo_va, tmp, &vm->done, base.vm_status) {
2955 if (!bo_va->base.bo)
2956 continue;
2957 total_done += amdgpu_bo_print_info(id++, bo_va->base.bo, m);
2958 }
2959 spin_unlock(&vm->status_lock);
2960 total_done_objs = id;
2961
2962 seq_printf(m, "\tTotal idle size: %12lld\tobjs:\t%d\n", total_idle,
2963 total_idle_objs);
2964 seq_printf(m, "\tTotal evicted size: %12lld\tobjs:\t%d\n", total_evicted,
2965 total_evicted_objs);
2966 seq_printf(m, "\tTotal relocated size: %12lld\tobjs:\t%d\n", total_relocated,
2967 total_relocated_objs);
2968 seq_printf(m, "\tTotal moved size: %12lld\tobjs:\t%d\n", total_moved,
2969 total_moved_objs);
2970 seq_printf(m, "\tTotal invalidated size: %12lld\tobjs:\t%d\n", total_invalidated,
2971 total_invalidated_objs);
2972 seq_printf(m, "\tTotal done size: %12lld\tobjs:\t%d\n", total_done,
2973 total_done_objs);
2974}
2975#endif
2976
2977/**
2978 * amdgpu_vm_update_fault_cache - update cached fault into.
2979 * @adev: amdgpu device pointer
2980 * @pasid: PASID of the VM
2981 * @addr: Address of the fault
2982 * @status: GPUVM fault status register
2983 * @vmhub: which vmhub got the fault
2984 *
2985 * Cache the fault info for later use by userspace in debugging.
2986 */
2987void amdgpu_vm_update_fault_cache(struct amdgpu_device *adev,
2988 unsigned int pasid,
2989 uint64_t addr,
2990 uint32_t status,
2991 unsigned int vmhub)
2992{
2993 struct amdgpu_vm *vm;
2994 unsigned long flags;
2995
2996 xa_lock_irqsave(&adev->vm_manager.pasids, flags);
2997
2998 vm = xa_load(&adev->vm_manager.pasids, pasid);
2999 /* Don't update the fault cache if status is 0. In the multiple
3000 * fault case, subsequent faults will return a 0 status which is
3001 * useless for userspace and replaces the useful fault status, so
3002 * only update if status is non-0.
3003 */
3004 if (vm && status) {
3005 vm->fault_info.addr = addr;
3006 vm->fault_info.status = status;
3007 /*
3008 * Update the fault information globally for later usage
3009 * when vm could be stale or freed.
3010 */
3011 adev->vm_manager.fault_info.addr = addr;
3012 adev->vm_manager.fault_info.vmhub = vmhub;
3013 adev->vm_manager.fault_info.status = status;
3014
3015 if (AMDGPU_IS_GFXHUB(vmhub)) {
3016 vm->fault_info.vmhub = AMDGPU_VMHUB_TYPE_GFX;
3017 vm->fault_info.vmhub |=
3018 (vmhub - AMDGPU_GFXHUB_START) << AMDGPU_VMHUB_IDX_SHIFT;
3019 } else if (AMDGPU_IS_MMHUB0(vmhub)) {
3020 vm->fault_info.vmhub = AMDGPU_VMHUB_TYPE_MM0;
3021 vm->fault_info.vmhub |=
3022 (vmhub - AMDGPU_MMHUB0_START) << AMDGPU_VMHUB_IDX_SHIFT;
3023 } else if (AMDGPU_IS_MMHUB1(vmhub)) {
3024 vm->fault_info.vmhub = AMDGPU_VMHUB_TYPE_MM1;
3025 vm->fault_info.vmhub |=
3026 (vmhub - AMDGPU_MMHUB1_START) << AMDGPU_VMHUB_IDX_SHIFT;
3027 } else {
3028 WARN_ONCE(1, "Invalid vmhub %u\n", vmhub);
3029 }
3030 }
3031 xa_unlock_irqrestore(&adev->vm_manager.pasids, flags);
3032}
3033
3034/**
3035 * amdgpu_vm_is_bo_always_valid - check if the BO is VM always valid
3036 *
3037 * @vm: VM to test against.
3038 * @bo: BO to be tested.
3039 *
3040 * Returns true if the BO shares the dma_resv object with the root PD and is
3041 * always guaranteed to be valid inside the VM.
3042 */
3043bool amdgpu_vm_is_bo_always_valid(struct amdgpu_vm *vm, struct amdgpu_bo *bo)
3044{
3045 return bo && bo->tbo.base.resv == vm->root.bo->tbo.base.resv;
3046}