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22#include "nouveau_svm.h"
23#include "nouveau_drv.h"
24#include "nouveau_chan.h"
25#include "nouveau_dmem.h"
26
27#include <nvif/notify.h>
28#include <nvif/object.h>
29#include <nvif/vmm.h>
30
31#include <nvif/class.h>
32#include <nvif/clb069.h>
33#include <nvif/ifc00d.h>
34
35#include <linux/sched/mm.h>
36#include <linux/sort.h>
37#include <linux/hmm.h>
38
39struct nouveau_svm {
40 struct nouveau_drm *drm;
41 struct mutex mutex;
42 struct list_head inst;
43
44 struct nouveau_svm_fault_buffer {
45 int id;
46 struct nvif_object object;
47 u32 entries;
48 u32 getaddr;
49 u32 putaddr;
50 u32 get;
51 u32 put;
52 struct nvif_notify notify;
53
54 struct nouveau_svm_fault {
55 u64 inst;
56 u64 addr;
57 u64 time;
58 u32 engine;
59 u8 gpc;
60 u8 hub;
61 u8 access;
62 u8 client;
63 u8 fault;
64 struct nouveau_svmm *svmm;
65 } **fault;
66 int fault_nr;
67 } buffer[1];
68};
69
70#define SVM_DBG(s,f,a...) NV_DEBUG((s)->drm, "svm: "f"\n", ##a)
71#define SVM_ERR(s,f,a...) NV_WARN((s)->drm, "svm: "f"\n", ##a)
72
73struct nouveau_ivmm {
74 struct nouveau_svmm *svmm;
75 u64 inst;
76 struct list_head head;
77};
78
79static struct nouveau_ivmm *
80nouveau_ivmm_find(struct nouveau_svm *svm, u64 inst)
81{
82 struct nouveau_ivmm *ivmm;
83 list_for_each_entry(ivmm, &svm->inst, head) {
84 if (ivmm->inst == inst)
85 return ivmm;
86 }
87 return NULL;
88}
89
90struct nouveau_svmm {
91 struct nouveau_vmm *vmm;
92 struct {
93 unsigned long start;
94 unsigned long limit;
95 } unmanaged;
96
97 struct mutex mutex;
98
99 struct mm_struct *mm;
100 struct hmm_mirror mirror;
101};
102
103#define SVMM_DBG(s,f,a...) \
104 NV_DEBUG((s)->vmm->cli->drm, "svm-%p: "f"\n", (s), ##a)
105#define SVMM_ERR(s,f,a...) \
106 NV_WARN((s)->vmm->cli->drm, "svm-%p: "f"\n", (s), ##a)
107
108int
109nouveau_svmm_bind(struct drm_device *dev, void *data,
110 struct drm_file *file_priv)
111{
112 struct nouveau_cli *cli = nouveau_cli(file_priv);
113 struct drm_nouveau_svm_bind *args = data;
114 unsigned target, cmd, priority;
115 unsigned long addr, end, size;
116 struct mm_struct *mm;
117
118 args->va_start &= PAGE_MASK;
119 args->va_end &= PAGE_MASK;
120
121
122 if (args->reserved0 || args->reserved1)
123 return -EINVAL;
124 if (args->header & (~NOUVEAU_SVM_BIND_VALID_MASK))
125 return -EINVAL;
126 if (args->va_start >= args->va_end)
127 return -EINVAL;
128 if (!args->npages)
129 return -EINVAL;
130
131 cmd = args->header >> NOUVEAU_SVM_BIND_COMMAND_SHIFT;
132 cmd &= NOUVEAU_SVM_BIND_COMMAND_MASK;
133 switch (cmd) {
134 case NOUVEAU_SVM_BIND_COMMAND__MIGRATE:
135 break;
136 default:
137 return -EINVAL;
138 }
139
140 priority = args->header >> NOUVEAU_SVM_BIND_PRIORITY_SHIFT;
141 priority &= NOUVEAU_SVM_BIND_PRIORITY_MASK;
142
143
144 target = args->header >> NOUVEAU_SVM_BIND_TARGET_SHIFT;
145 target &= NOUVEAU_SVM_BIND_TARGET_MASK;
146 switch (target) {
147 case NOUVEAU_SVM_BIND_TARGET__GPU_VRAM:
148 break;
149 default:
150 return -EINVAL;
151 }
152
153
154
155
156
157
158 if (args->stride)
159 return -EINVAL;
160
161 size = ((unsigned long)args->npages) << PAGE_SHIFT;
162 if ((args->va_start + size) <= args->va_start)
163 return -EINVAL;
164 if ((args->va_start + size) > args->va_end)
165 return -EINVAL;
166
167
168
169
170
171
172
173 mm = get_task_mm(current);
174 down_read(&mm->mmap_sem);
175
176 for (addr = args->va_start, end = args->va_start + size; addr < end;) {
177 struct vm_area_struct *vma;
178 unsigned long next;
179
180 vma = find_vma_intersection(mm, addr, end);
181 if (!vma)
182 break;
183
184 next = min(vma->vm_end, end);
185
186 nouveau_dmem_migrate_vma(cli->drm, vma, addr, next);
187 addr = next;
188 }
189
190
191
192
193
194
195 args->result = 0;
196
197 up_read(&mm->mmap_sem);
198 mmput(mm);
199
200 return 0;
201}
202
203
204void
205nouveau_svmm_part(struct nouveau_svmm *svmm, u64 inst)
206{
207 struct nouveau_ivmm *ivmm;
208 if (svmm) {
209 mutex_lock(&svmm->vmm->cli->drm->svm->mutex);
210 ivmm = nouveau_ivmm_find(svmm->vmm->cli->drm->svm, inst);
211 if (ivmm) {
212 list_del(&ivmm->head);
213 kfree(ivmm);
214 }
215 mutex_unlock(&svmm->vmm->cli->drm->svm->mutex);
216 }
217}
218
219
220int
221nouveau_svmm_join(struct nouveau_svmm *svmm, u64 inst)
222{
223 struct nouveau_ivmm *ivmm;
224 if (svmm) {
225 if (!(ivmm = kmalloc(sizeof(*ivmm), GFP_KERNEL)))
226 return -ENOMEM;
227 ivmm->svmm = svmm;
228 ivmm->inst = inst;
229
230 mutex_lock(&svmm->vmm->cli->drm->svm->mutex);
231 list_add(&ivmm->head, &svmm->vmm->cli->drm->svm->inst);
232 mutex_unlock(&svmm->vmm->cli->drm->svm->mutex);
233 }
234 return 0;
235}
236
237
238static void
239nouveau_svmm_invalidate(struct nouveau_svmm *svmm, u64 start, u64 limit)
240{
241 if (limit > start) {
242 bool super = svmm->vmm->vmm.object.client->super;
243 svmm->vmm->vmm.object.client->super = true;
244 nvif_object_mthd(&svmm->vmm->vmm.object, NVIF_VMM_V0_PFNCLR,
245 &(struct nvif_vmm_pfnclr_v0) {
246 .addr = start,
247 .size = limit - start,
248 }, sizeof(struct nvif_vmm_pfnclr_v0));
249 svmm->vmm->vmm.object.client->super = super;
250 }
251}
252
253static int
254nouveau_svmm_sync_cpu_device_pagetables(struct hmm_mirror *mirror,
255 const struct hmm_update *update)
256{
257 struct nouveau_svmm *svmm = container_of(mirror, typeof(*svmm), mirror);
258 unsigned long start = update->start;
259 unsigned long limit = update->end;
260
261 if (!update->blockable)
262 return -EAGAIN;
263
264 SVMM_DBG(svmm, "invalidate %016lx-%016lx", start, limit);
265
266 mutex_lock(&svmm->mutex);
267 if (limit > svmm->unmanaged.start && start < svmm->unmanaged.limit) {
268 if (start < svmm->unmanaged.start) {
269 nouveau_svmm_invalidate(svmm, start,
270 svmm->unmanaged.limit);
271 }
272 start = svmm->unmanaged.limit;
273 }
274
275 nouveau_svmm_invalidate(svmm, start, limit);
276 mutex_unlock(&svmm->mutex);
277 return 0;
278}
279
280static void
281nouveau_svmm_release(struct hmm_mirror *mirror)
282{
283}
284
285static const struct hmm_mirror_ops
286nouveau_svmm = {
287 .sync_cpu_device_pagetables = nouveau_svmm_sync_cpu_device_pagetables,
288 .release = nouveau_svmm_release,
289};
290
291void
292nouveau_svmm_fini(struct nouveau_svmm **psvmm)
293{
294 struct nouveau_svmm *svmm = *psvmm;
295 if (svmm) {
296 hmm_mirror_unregister(&svmm->mirror);
297 kfree(*psvmm);
298 *psvmm = NULL;
299 }
300}
301
302int
303nouveau_svmm_init(struct drm_device *dev, void *data,
304 struct drm_file *file_priv)
305{
306 struct nouveau_cli *cli = nouveau_cli(file_priv);
307 struct nouveau_svmm *svmm;
308 struct drm_nouveau_svm_init *args = data;
309 int ret;
310
311
312 if (!(svmm = kzalloc(sizeof(*svmm), GFP_KERNEL)))
313 return -ENOMEM;
314 svmm->vmm = &cli->svm;
315 svmm->unmanaged.start = args->unmanaged_addr;
316 svmm->unmanaged.limit = args->unmanaged_addr + args->unmanaged_size;
317 mutex_init(&svmm->mutex);
318
319
320 mutex_lock(&cli->mutex);
321 if (cli->svm.cli) {
322 ret = -EBUSY;
323 goto done;
324 }
325
326
327
328
329
330
331
332 ret = nvif_vmm_init(&cli->mmu, cli->vmm.vmm.object.oclass, true,
333 args->unmanaged_addr, args->unmanaged_size,
334 &(struct gp100_vmm_v0) {
335 .fault_replay = true,
336 }, sizeof(struct gp100_vmm_v0), &cli->svm.vmm);
337 if (ret)
338 goto done;
339
340
341 svmm->mm = get_task_mm(current);
342 down_write(&svmm->mm->mmap_sem);
343 svmm->mirror.ops = &nouveau_svmm;
344 ret = hmm_mirror_register(&svmm->mirror, svmm->mm);
345 if (ret == 0) {
346 cli->svm.svmm = svmm;
347 cli->svm.cli = cli;
348 }
349 up_write(&svmm->mm->mmap_sem);
350 mmput(svmm->mm);
351
352done:
353 if (ret)
354 nouveau_svmm_fini(&svmm);
355 mutex_unlock(&cli->mutex);
356 return ret;
357}
358
359static const u64
360nouveau_svm_pfn_flags[HMM_PFN_FLAG_MAX] = {
361 [HMM_PFN_VALID ] = NVIF_VMM_PFNMAP_V0_V,
362 [HMM_PFN_WRITE ] = NVIF_VMM_PFNMAP_V0_W,
363 [HMM_PFN_DEVICE_PRIVATE] = NVIF_VMM_PFNMAP_V0_VRAM,
364};
365
366static const u64
367nouveau_svm_pfn_values[HMM_PFN_VALUE_MAX] = {
368 [HMM_PFN_ERROR ] = ~NVIF_VMM_PFNMAP_V0_V,
369 [HMM_PFN_NONE ] = NVIF_VMM_PFNMAP_V0_NONE,
370 [HMM_PFN_SPECIAL] = ~NVIF_VMM_PFNMAP_V0_V,
371};
372
373
374static void
375nouveau_svm_fault_replay(struct nouveau_svm *svm)
376{
377 SVM_DBG(svm, "replay");
378 WARN_ON(nvif_object_mthd(&svm->drm->client.vmm.vmm.object,
379 GP100_VMM_VN_FAULT_REPLAY,
380 &(struct gp100_vmm_fault_replay_vn) {},
381 sizeof(struct gp100_vmm_fault_replay_vn)));
382}
383
384
385
386
387
388
389static void
390nouveau_svm_fault_cancel(struct nouveau_svm *svm,
391 u64 inst, u8 hub, u8 gpc, u8 client)
392{
393 SVM_DBG(svm, "cancel %016llx %d %02x %02x", inst, hub, gpc, client);
394 WARN_ON(nvif_object_mthd(&svm->drm->client.vmm.vmm.object,
395 GP100_VMM_VN_FAULT_CANCEL,
396 &(struct gp100_vmm_fault_cancel_v0) {
397 .hub = hub,
398 .gpc = gpc,
399 .client = client,
400 .inst = inst,
401 }, sizeof(struct gp100_vmm_fault_cancel_v0)));
402}
403
404static void
405nouveau_svm_fault_cancel_fault(struct nouveau_svm *svm,
406 struct nouveau_svm_fault *fault)
407{
408 nouveau_svm_fault_cancel(svm, fault->inst,
409 fault->hub,
410 fault->gpc,
411 fault->client);
412}
413
414static int
415nouveau_svm_fault_cmp(const void *a, const void *b)
416{
417 const struct nouveau_svm_fault *fa = *(struct nouveau_svm_fault **)a;
418 const struct nouveau_svm_fault *fb = *(struct nouveau_svm_fault **)b;
419 int ret;
420 if ((ret = (s64)fa->inst - fb->inst))
421 return ret;
422 if ((ret = (s64)fa->addr - fb->addr))
423 return ret;
424
425 return (fa->access == 0 || fa->access == 3) -
426 (fb->access == 0 || fb->access == 3);
427}
428
429static void
430nouveau_svm_fault_cache(struct nouveau_svm *svm,
431 struct nouveau_svm_fault_buffer *buffer, u32 offset)
432{
433 struct nvif_object *memory = &buffer->object;
434 const u32 instlo = nvif_rd32(memory, offset + 0x00);
435 const u32 insthi = nvif_rd32(memory, offset + 0x04);
436 const u32 addrlo = nvif_rd32(memory, offset + 0x08);
437 const u32 addrhi = nvif_rd32(memory, offset + 0x0c);
438 const u32 timelo = nvif_rd32(memory, offset + 0x10);
439 const u32 timehi = nvif_rd32(memory, offset + 0x14);
440 const u32 engine = nvif_rd32(memory, offset + 0x18);
441 const u32 info = nvif_rd32(memory, offset + 0x1c);
442 const u64 inst = (u64)insthi << 32 | instlo;
443 const u8 gpc = (info & 0x1f000000) >> 24;
444 const u8 hub = (info & 0x00100000) >> 20;
445 const u8 client = (info & 0x00007f00) >> 8;
446 struct nouveau_svm_fault *fault;
447
448
449 if (WARN_ON(!(info & 0x80000000)))
450 return;
451
452 nvif_mask(memory, offset + 0x1c, 0x80000000, 0x00000000);
453
454 if (!buffer->fault[buffer->fault_nr]) {
455 fault = kmalloc(sizeof(*fault), GFP_KERNEL);
456 if (WARN_ON(!fault)) {
457 nouveau_svm_fault_cancel(svm, inst, hub, gpc, client);
458 return;
459 }
460 buffer->fault[buffer->fault_nr] = fault;
461 }
462
463 fault = buffer->fault[buffer->fault_nr++];
464 fault->inst = inst;
465 fault->addr = (u64)addrhi << 32 | addrlo;
466 fault->time = (u64)timehi << 32 | timelo;
467 fault->engine = engine;
468 fault->gpc = gpc;
469 fault->hub = hub;
470 fault->access = (info & 0x000f0000) >> 16;
471 fault->client = client;
472 fault->fault = (info & 0x0000001f);
473
474 SVM_DBG(svm, "fault %016llx %016llx %02x",
475 fault->inst, fault->addr, fault->access);
476}
477
478static inline bool
479nouveau_range_done(struct hmm_range *range)
480{
481 bool ret = hmm_range_valid(range);
482
483 hmm_range_unregister(range);
484 return ret;
485}
486
487static int
488nouveau_range_fault(struct hmm_mirror *mirror, struct hmm_range *range)
489{
490 long ret;
491
492 range->default_flags = 0;
493 range->pfn_flags_mask = -1UL;
494
495 ret = hmm_range_register(range, mirror,
496 range->start, range->end,
497 PAGE_SHIFT);
498 if (ret) {
499 up_read(&range->vma->vm_mm->mmap_sem);
500 return (int)ret;
501 }
502
503 if (!hmm_range_wait_until_valid(range, HMM_RANGE_DEFAULT_TIMEOUT)) {
504 up_read(&range->vma->vm_mm->mmap_sem);
505 return -EAGAIN;
506 }
507
508 ret = hmm_range_fault(range, true);
509 if (ret <= 0) {
510 if (ret == 0)
511 ret = -EBUSY;
512 up_read(&range->vma->vm_mm->mmap_sem);
513 hmm_range_unregister(range);
514 return ret;
515 }
516 return 0;
517}
518
519static int
520nouveau_svm_fault(struct nvif_notify *notify)
521{
522 struct nouveau_svm_fault_buffer *buffer =
523 container_of(notify, typeof(*buffer), notify);
524 struct nouveau_svm *svm =
525 container_of(buffer, typeof(*svm), buffer[buffer->id]);
526 struct nvif_object *device = &svm->drm->client.device.object;
527 struct nouveau_svmm *svmm;
528 struct {
529 struct {
530 struct nvif_ioctl_v0 i;
531 struct nvif_ioctl_mthd_v0 m;
532 struct nvif_vmm_pfnmap_v0 p;
533 } i;
534 u64 phys[16];
535 } args;
536 struct hmm_range range;
537 struct vm_area_struct *vma;
538 u64 inst, start, limit;
539 int fi, fn, pi, fill;
540 int replay = 0, ret;
541
542
543
544
545 SVM_DBG(svm, "fault handler");
546 if (buffer->get == buffer->put) {
547 buffer->put = nvif_rd32(device, buffer->putaddr);
548 buffer->get = nvif_rd32(device, buffer->getaddr);
549 if (buffer->get == buffer->put)
550 return NVIF_NOTIFY_KEEP;
551 }
552 buffer->fault_nr = 0;
553
554 SVM_DBG(svm, "get %08x put %08x", buffer->get, buffer->put);
555 while (buffer->get != buffer->put) {
556 nouveau_svm_fault_cache(svm, buffer, buffer->get * 0x20);
557 if (++buffer->get == buffer->entries)
558 buffer->get = 0;
559 }
560 nvif_wr32(device, buffer->getaddr, buffer->get);
561 SVM_DBG(svm, "%d fault(s) pending", buffer->fault_nr);
562
563
564
565
566
567 sort(buffer->fault, buffer->fault_nr, sizeof(*buffer->fault),
568 nouveau_svm_fault_cmp, NULL);
569
570
571 mutex_lock(&svm->mutex);
572 for (fi = 0, svmm = NULL; fi < buffer->fault_nr; fi++) {
573 if (!svmm || buffer->fault[fi]->inst != inst) {
574 struct nouveau_ivmm *ivmm =
575 nouveau_ivmm_find(svm, buffer->fault[fi]->inst);
576 svmm = ivmm ? ivmm->svmm : NULL;
577 inst = buffer->fault[fi]->inst;
578 SVM_DBG(svm, "inst %016llx -> svm-%p", inst, svmm);
579 }
580 buffer->fault[fi]->svmm = svmm;
581 }
582 mutex_unlock(&svm->mutex);
583
584
585 args.i.i.version = 0;
586 args.i.i.type = NVIF_IOCTL_V0_MTHD;
587 args.i.m.version = 0;
588 args.i.m.method = NVIF_VMM_V0_PFNMAP;
589 args.i.p.version = 0;
590
591 for (fi = 0; fn = fi + 1, fi < buffer->fault_nr; fi = fn) {
592
593 if (!(svmm = buffer->fault[fi]->svmm)) {
594 nouveau_svm_fault_cancel_fault(svm, buffer->fault[fi]);
595 continue;
596 }
597 SVMM_DBG(svmm, "addr %016llx", buffer->fault[fi]->addr);
598
599
600
601
602 start = buffer->fault[fi]->addr;
603 limit = start + (ARRAY_SIZE(args.phys) << PAGE_SHIFT);
604 if (start < svmm->unmanaged.limit)
605 limit = min_t(u64, limit, svmm->unmanaged.start);
606 else
607 if (limit > svmm->unmanaged.start)
608 start = max_t(u64, start, svmm->unmanaged.limit);
609 SVMM_DBG(svmm, "wndw %016llx-%016llx", start, limit);
610
611
612
613
614 down_read(&svmm->mm->mmap_sem);
615 vma = find_vma_intersection(svmm->mm, start, limit);
616 if (!vma) {
617 SVMM_ERR(svmm, "wndw %016llx-%016llx", start, limit);
618 up_read(&svmm->mm->mmap_sem);
619 nouveau_svm_fault_cancel_fault(svm, buffer->fault[fi]);
620 continue;
621 }
622 start = max_t(u64, start, vma->vm_start);
623 limit = min_t(u64, limit, vma->vm_end);
624 SVMM_DBG(svmm, "wndw %016llx-%016llx", start, limit);
625
626 if (buffer->fault[fi]->addr != start) {
627 SVMM_ERR(svmm, "addr %016llx", buffer->fault[fi]->addr);
628 up_read(&svmm->mm->mmap_sem);
629 nouveau_svm_fault_cancel_fault(svm, buffer->fault[fi]);
630 continue;
631 }
632
633
634
635
636
637 args.i.p.page = PAGE_SHIFT;
638 args.i.p.addr = start;
639 for (fn = fi, pi = 0;;) {
640
641
642
643
644 if (buffer->fault[fn]->access != 0 &&
645 buffer->fault[fn]->access != 3 ) {
646 args.phys[pi++] = NVIF_VMM_PFNMAP_V0_V |
647 NVIF_VMM_PFNMAP_V0_W;
648 } else {
649 args.phys[pi++] = NVIF_VMM_PFNMAP_V0_V;
650 }
651 args.i.p.size = pi << PAGE_SHIFT;
652
653
654
655
656
657
658
659
660 while (++fn < buffer->fault_nr &&
661 buffer->fault[fn]->svmm == svmm &&
662 buffer->fault[fn ]->addr ==
663 buffer->fault[fn - 1]->addr);
664
665
666
667
668 if (fn >= buffer->fault_nr ||
669 buffer->fault[fn]->svmm != svmm ||
670 buffer->fault[fn]->addr >= limit)
671 break;
672
673
674 fill = (buffer->fault[fn ]->addr -
675 buffer->fault[fn - 1]->addr) >> PAGE_SHIFT;
676 while (--fill)
677 args.phys[pi++] = NVIF_VMM_PFNMAP_V0_NONE;
678 }
679
680 SVMM_DBG(svmm, "wndw %016llx-%016llx covering %d fault(s)",
681 args.i.p.addr,
682 args.i.p.addr + args.i.p.size, fn - fi);
683
684
685 range.vma = vma;
686 range.start = args.i.p.addr;
687 range.end = args.i.p.addr + args.i.p.size;
688 range.pfns = args.phys;
689 range.flags = nouveau_svm_pfn_flags;
690 range.values = nouveau_svm_pfn_values;
691 range.pfn_shift = NVIF_VMM_PFNMAP_V0_ADDR_SHIFT;
692again:
693 ret = nouveau_range_fault(&svmm->mirror, &range);
694 if (ret == 0) {
695 mutex_lock(&svmm->mutex);
696 if (!nouveau_range_done(&range)) {
697 mutex_unlock(&svmm->mutex);
698 goto again;
699 }
700
701 nouveau_dmem_convert_pfn(svm->drm, &range);
702
703 svmm->vmm->vmm.object.client->super = true;
704 ret = nvif_object_ioctl(&svmm->vmm->vmm.object,
705 &args, sizeof(args.i) +
706 pi * sizeof(args.phys[0]),
707 NULL);
708 svmm->vmm->vmm.object.client->super = false;
709 mutex_unlock(&svmm->mutex);
710 up_read(&svmm->mm->mmap_sem);
711 }
712
713
714
715
716
717
718 while (fi < fn) {
719 struct nouveau_svm_fault *fault = buffer->fault[fi++];
720 pi = (fault->addr - range.start) >> PAGE_SHIFT;
721 if (ret ||
722 !(range.pfns[pi] & NVIF_VMM_PFNMAP_V0_V) ||
723 (!(range.pfns[pi] & NVIF_VMM_PFNMAP_V0_W) &&
724 fault->access != 0 && fault->access != 3)) {
725 nouveau_svm_fault_cancel_fault(svm, fault);
726 continue;
727 }
728 replay++;
729 }
730 }
731
732
733 if (replay)
734 nouveau_svm_fault_replay(svm);
735 return NVIF_NOTIFY_KEEP;
736}
737
738static void
739nouveau_svm_fault_buffer_fini(struct nouveau_svm *svm, int id)
740{
741 struct nouveau_svm_fault_buffer *buffer = &svm->buffer[id];
742 nvif_notify_put(&buffer->notify);
743}
744
745static int
746nouveau_svm_fault_buffer_init(struct nouveau_svm *svm, int id)
747{
748 struct nouveau_svm_fault_buffer *buffer = &svm->buffer[id];
749 struct nvif_object *device = &svm->drm->client.device.object;
750 buffer->get = nvif_rd32(device, buffer->getaddr);
751 buffer->put = nvif_rd32(device, buffer->putaddr);
752 SVM_DBG(svm, "get %08x put %08x (init)", buffer->get, buffer->put);
753 return nvif_notify_get(&buffer->notify);
754}
755
756static void
757nouveau_svm_fault_buffer_dtor(struct nouveau_svm *svm, int id)
758{
759 struct nouveau_svm_fault_buffer *buffer = &svm->buffer[id];
760 int i;
761
762 if (buffer->fault) {
763 for (i = 0; buffer->fault[i] && i < buffer->entries; i++)
764 kfree(buffer->fault[i]);
765 kvfree(buffer->fault);
766 }
767
768 nouveau_svm_fault_buffer_fini(svm, id);
769
770 nvif_notify_fini(&buffer->notify);
771 nvif_object_fini(&buffer->object);
772}
773
774static int
775nouveau_svm_fault_buffer_ctor(struct nouveau_svm *svm, s32 oclass, int id)
776{
777 struct nouveau_svm_fault_buffer *buffer = &svm->buffer[id];
778 struct nouveau_drm *drm = svm->drm;
779 struct nvif_object *device = &drm->client.device.object;
780 struct nvif_clb069_v0 args = {};
781 int ret;
782
783 buffer->id = id;
784
785 ret = nvif_object_init(device, 0, oclass, &args, sizeof(args),
786 &buffer->object);
787 if (ret < 0) {
788 SVM_ERR(svm, "Fault buffer allocation failed: %d", ret);
789 return ret;
790 }
791
792 nvif_object_map(&buffer->object, NULL, 0);
793 buffer->entries = args.entries;
794 buffer->getaddr = args.get;
795 buffer->putaddr = args.put;
796
797 ret = nvif_notify_init(&buffer->object, nouveau_svm_fault, true,
798 NVB069_V0_NTFY_FAULT, NULL, 0, 0,
799 &buffer->notify);
800 if (ret)
801 return ret;
802
803 buffer->fault = kvzalloc(sizeof(*buffer->fault) * buffer->entries, GFP_KERNEL);
804 if (!buffer->fault)
805 return -ENOMEM;
806
807 return nouveau_svm_fault_buffer_init(svm, id);
808}
809
810void
811nouveau_svm_resume(struct nouveau_drm *drm)
812{
813 struct nouveau_svm *svm = drm->svm;
814 if (svm)
815 nouveau_svm_fault_buffer_init(svm, 0);
816}
817
818void
819nouveau_svm_suspend(struct nouveau_drm *drm)
820{
821 struct nouveau_svm *svm = drm->svm;
822 if (svm)
823 nouveau_svm_fault_buffer_fini(svm, 0);
824}
825
826void
827nouveau_svm_fini(struct nouveau_drm *drm)
828{
829 struct nouveau_svm *svm = drm->svm;
830 if (svm) {
831 nouveau_svm_fault_buffer_dtor(svm, 0);
832 kfree(drm->svm);
833 drm->svm = NULL;
834 }
835}
836
837void
838nouveau_svm_init(struct nouveau_drm *drm)
839{
840 static const struct nvif_mclass buffers[] = {
841 { VOLTA_FAULT_BUFFER_A, 0 },
842 { MAXWELL_FAULT_BUFFER_A, 0 },
843 {}
844 };
845 struct nouveau_svm *svm;
846 int ret;
847
848
849
850
851
852 if (drm->client.device.info.family > NV_DEVICE_INFO_V0_PASCAL)
853 return;
854
855 if (!(drm->svm = svm = kzalloc(sizeof(*drm->svm), GFP_KERNEL)))
856 return;
857
858 drm->svm->drm = drm;
859 mutex_init(&drm->svm->mutex);
860 INIT_LIST_HEAD(&drm->svm->inst);
861
862 ret = nvif_mclass(&drm->client.device.object, buffers);
863 if (ret < 0) {
864 SVM_DBG(svm, "No supported fault buffer class");
865 nouveau_svm_fini(drm);
866 return;
867 }
868
869 ret = nouveau_svm_fault_buffer_ctor(svm, buffers[ret].oclass, 0);
870 if (ret) {
871 nouveau_svm_fini(drm);
872 return;
873 }
874
875 SVM_DBG(svm, "Initialised");
876}
877