1 /*
2  * Copyright (C) 2008 Ben Skeggs.
3  * All Rights Reserved.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining
6  * a copy of this software and associated documentation files (the
7  * "Software"), to deal in the Software without restriction, including
8  * without limitation the rights to use, copy, modify, merge, publish,
9  * distribute, sublicense, and/or sell copies of the Software, and to
10  * permit persons to whom the Software is furnished to do so, subject to
11  * the following conditions:
12  *
13  * The above copyright notice and this permission notice (including the
14  * next paragraph) shall be included in all copies or substantial
15  * portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24  *
25  */
26 
27 #include <drm/drm_gem_ttm_helper.h>
28 
29 #include "nouveau_drv.h"
30 #include "nouveau_dma.h"
31 #include "nouveau_fence.h"
32 #include "nouveau_abi16.h"
33 
34 #include "nouveau_ttm.h"
35 #include "nouveau_gem.h"
36 #include "nouveau_mem.h"
37 #include "nouveau_vmm.h"
38 
39 #include <nvif/class.h>
40 #include <nvif/push206e.h>
41 
42 static vm_fault_t nouveau_ttm_fault(struct vm_fault *vmf)
43 {
44 	struct vm_area_struct *vma = vmf->vma;
45 	struct ttm_buffer_object *bo = vma->vm_private_data;
46 	pgprot_t prot;
47 	vm_fault_t ret;
48 
49 	ret = ttm_bo_vm_reserve(bo, vmf);
50 	if (ret)
51 		return ret;
52 
53 	ret = nouveau_ttm_fault_reserve_notify(bo);
54 	if (ret)
55 		goto error_unlock;
56 
57 	nouveau_bo_del_io_reserve_lru(bo);
58 	prot = vm_get_page_prot(vma->vm_flags);
59 	ret = ttm_bo_vm_fault_reserved(vmf, prot, TTM_BO_VM_NUM_PREFAULT);
60 	nouveau_bo_add_io_reserve_lru(bo);
61 	if (ret == VM_FAULT_RETRY && !(vmf->flags & FAULT_FLAG_RETRY_NOWAIT))
62 		return ret;
63 
64 error_unlock:
65 	dma_resv_unlock(bo->base.resv);
66 	return ret;
67 }
68 
69 static const struct vm_operations_struct nouveau_ttm_vm_ops = {
70 	.fault = nouveau_ttm_fault,
71 	.open = ttm_bo_vm_open,
72 	.close = ttm_bo_vm_close,
73 	.access = ttm_bo_vm_access
74 };
75 
76 void
77 nouveau_gem_object_del(struct drm_gem_object *gem)
78 {
79 	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
80 	struct nouveau_drm *drm = nouveau_bdev(nvbo->bo.bdev);
81 	struct device *dev = drm->dev->dev;
82 	int ret;
83 
84 	ret = pm_runtime_get_sync(dev);
85 	if (WARN_ON(ret < 0 && ret != -EACCES)) {
86 		pm_runtime_put_autosuspend(dev);
87 		return;
88 	}
89 
90 	if (gem->import_attach)
91 		drm_prime_gem_destroy(gem, nvbo->bo.sg);
92 
93 	ttm_bo_put(&nvbo->bo);
94 
95 	pm_runtime_mark_last_busy(dev);
96 	pm_runtime_put_autosuspend(dev);
97 }
98 
99 int
100 nouveau_gem_object_open(struct drm_gem_object *gem, struct drm_file *file_priv)
101 {
102 	struct nouveau_cli *cli = nouveau_cli(file_priv);
103 	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
104 	struct nouveau_drm *drm = nouveau_bdev(nvbo->bo.bdev);
105 	struct device *dev = drm->dev->dev;
106 	struct nouveau_uvmm *uvmm = nouveau_cli_uvmm(cli);
107 	struct nouveau_vmm *vmm = nouveau_cli_vmm(cli);
108 	struct nouveau_vma *vma;
109 	int ret;
110 
111 	if (vmm->vmm.object.oclass < NVIF_CLASS_VMM_NV50)
112 		return 0;
113 
114 	if (nvbo->no_share && uvmm && &uvmm->resv != nvbo->bo.base.resv)
115 		return -EPERM;
116 
117 	ret = ttm_bo_reserve(&nvbo->bo, false, false, NULL);
118 	if (ret)
119 		return ret;
120 
121 	ret = pm_runtime_get_sync(dev);
122 	if (ret < 0 && ret != -EACCES) {
123 		pm_runtime_put_autosuspend(dev);
124 		goto out;
125 	}
126 
127 	/* only create a VMA on binding */
128 	if (!nouveau_cli_uvmm(cli))
129 		ret = nouveau_vma_new(nvbo, vmm, &vma);
130 	else
131 		ret = 0;
132 	pm_runtime_mark_last_busy(dev);
133 	pm_runtime_put_autosuspend(dev);
134 out:
135 	ttm_bo_unreserve(&nvbo->bo);
136 	return ret;
137 }
138 
139 struct nouveau_gem_object_unmap {
140 	struct nouveau_cli_work work;
141 	struct nouveau_vma *vma;
142 };
143 
144 static void
145 nouveau_gem_object_delete(struct nouveau_vma *vma)
146 {
147 	nouveau_fence_unref(&vma->fence);
148 	nouveau_vma_del(&vma);
149 }
150 
151 static void
152 nouveau_gem_object_delete_work(struct nouveau_cli_work *w)
153 {
154 	struct nouveau_gem_object_unmap *work =
155 		container_of(w, typeof(*work), work);
156 	nouveau_gem_object_delete(work->vma);
157 	kfree(work);
158 }
159 
160 static void
161 nouveau_gem_object_unmap(struct nouveau_bo *nvbo, struct nouveau_vma *vma)
162 {
163 	struct dma_fence *fence = vma->fence ? &vma->fence->base : NULL;
164 	struct nouveau_gem_object_unmap *work;
165 
166 	list_del_init(&vma->head);
167 
168 	if (!fence) {
169 		nouveau_gem_object_delete(vma);
170 		return;
171 	}
172 
173 	if (!(work = kmalloc(sizeof(*work), GFP_KERNEL))) {
174 		WARN_ON(dma_fence_wait_timeout(fence, false, 2 * HZ) <= 0);
175 		nouveau_gem_object_delete(vma);
176 		return;
177 	}
178 
179 	work->work.func = nouveau_gem_object_delete_work;
180 	work->vma = vma;
181 	nouveau_cli_work_queue(vma->vmm->cli, fence, &work->work);
182 }
183 
184 void
185 nouveau_gem_object_close(struct drm_gem_object *gem, struct drm_file *file_priv)
186 {
187 	struct nouveau_cli *cli = nouveau_cli(file_priv);
188 	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
189 	struct nouveau_drm *drm = nouveau_bdev(nvbo->bo.bdev);
190 	struct device *dev = drm->dev->dev;
191 	struct nouveau_vmm *vmm = nouveau_cli_vmm(cli);
192 	struct nouveau_vma *vma;
193 	int ret;
194 
195 	if (vmm->vmm.object.oclass < NVIF_CLASS_VMM_NV50)
196 		return;
197 
198 	if (nouveau_cli_uvmm(cli))
199 		return;
200 
201 	ret = ttm_bo_reserve(&nvbo->bo, false, false, NULL);
202 	if (ret)
203 		return;
204 
205 	vma = nouveau_vma_find(nvbo, vmm);
206 	if (vma) {
207 		if (--vma->refs == 0) {
208 			ret = pm_runtime_get_sync(dev);
209 			if (!WARN_ON(ret < 0 && ret != -EACCES)) {
210 				nouveau_gem_object_unmap(nvbo, vma);
211 				pm_runtime_mark_last_busy(dev);
212 			}
213 			pm_runtime_put_autosuspend(dev);
214 		}
215 	}
216 	ttm_bo_unreserve(&nvbo->bo);
217 }
218 
219 const struct drm_gem_object_funcs nouveau_gem_object_funcs = {
220 	.free = nouveau_gem_object_del,
221 	.open = nouveau_gem_object_open,
222 	.close = nouveau_gem_object_close,
223 	.export = nouveau_gem_prime_export,
224 	.pin = nouveau_gem_prime_pin,
225 	.unpin = nouveau_gem_prime_unpin,
226 	.get_sg_table = nouveau_gem_prime_get_sg_table,
227 	.vmap = drm_gem_ttm_vmap,
228 	.vunmap = drm_gem_ttm_vunmap,
229 	.mmap = drm_gem_ttm_mmap,
230 	.vm_ops = &nouveau_ttm_vm_ops,
231 };
232 
233 int
234 nouveau_gem_new(struct nouveau_cli *cli, u64 size, int align, uint32_t domain,
235 		uint32_t tile_mode, uint32_t tile_flags,
236 		struct nouveau_bo **pnvbo)
237 {
238 	struct nouveau_drm *drm = cli->drm;
239 	struct nouveau_uvmm *uvmm = nouveau_cli_uvmm(cli);
240 	struct dma_resv *resv = NULL;
241 	struct nouveau_bo *nvbo;
242 	int ret;
243 
244 	if (domain & NOUVEAU_GEM_DOMAIN_NO_SHARE) {
245 		if (unlikely(!uvmm))
246 			return -EINVAL;
247 
248 		resv = &uvmm->resv;
249 	}
250 
251 	if (!(domain & (NOUVEAU_GEM_DOMAIN_VRAM | NOUVEAU_GEM_DOMAIN_GART)))
252 		domain |= NOUVEAU_GEM_DOMAIN_CPU;
253 
254 	nvbo = nouveau_bo_alloc(cli, &size, &align, domain, tile_mode,
255 				tile_flags, false);
256 	if (IS_ERR(nvbo))
257 		return PTR_ERR(nvbo);
258 
259 	nvbo->bo.base.funcs = &nouveau_gem_object_funcs;
260 	nvbo->no_share = domain & NOUVEAU_GEM_DOMAIN_NO_SHARE;
261 
262 	/* Initialize the embedded gem-object. We return a single gem-reference
263 	 * to the caller, instead of a normal nouveau_bo ttm reference. */
264 	ret = drm_gem_object_init(drm->dev, &nvbo->bo.base, size);
265 	if (ret) {
266 		drm_gem_object_release(&nvbo->bo.base);
267 		kfree(nvbo);
268 		return ret;
269 	}
270 
271 	if (resv)
272 		dma_resv_lock(resv, NULL);
273 
274 	ret = nouveau_bo_init(nvbo, size, align, domain, NULL, resv);
275 
276 	if (resv)
277 		dma_resv_unlock(resv);
278 
279 	if (ret)
280 		return ret;
281 
282 	/* we restrict allowed domains on nv50+ to only the types
283 	 * that were requested at creation time.  not possibly on
284 	 * earlier chips without busting the ABI.
285 	 */
286 	nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_VRAM |
287 			      NOUVEAU_GEM_DOMAIN_GART;
288 	if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA)
289 		nvbo->valid_domains &= domain;
290 
291 	*pnvbo = nvbo;
292 	return 0;
293 }
294 
295 static int
296 nouveau_gem_info(struct drm_file *file_priv, struct drm_gem_object *gem,
297 		 struct drm_nouveau_gem_info *rep)
298 {
299 	struct nouveau_cli *cli = nouveau_cli(file_priv);
300 	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
301 	struct nouveau_vmm *vmm = nouveau_cli_vmm(cli);
302 	struct nouveau_vma *vma;
303 
304 	if (is_power_of_2(nvbo->valid_domains))
305 		rep->domain = nvbo->valid_domains;
306 	else if (nvbo->bo.resource->mem_type == TTM_PL_TT)
307 		rep->domain = NOUVEAU_GEM_DOMAIN_GART;
308 	else
309 		rep->domain = NOUVEAU_GEM_DOMAIN_VRAM;
310 	rep->offset = nvbo->offset;
311 	if (vmm->vmm.object.oclass >= NVIF_CLASS_VMM_NV50 &&
312 	    !nouveau_cli_uvmm(cli)) {
313 		vma = nouveau_vma_find(nvbo, vmm);
314 		if (!vma)
315 			return -EINVAL;
316 
317 		rep->offset = vma->addr;
318 	} else
319 		rep->offset = 0;
320 
321 	rep->size = nvbo->bo.base.size;
322 	rep->map_handle = drm_vma_node_offset_addr(&nvbo->bo.base.vma_node);
323 	rep->tile_mode = nvbo->mode;
324 	rep->tile_flags = nvbo->contig ? 0 : NOUVEAU_GEM_TILE_NONCONTIG;
325 	if (cli->device.info.family >= NV_DEVICE_INFO_V0_FERMI)
326 		rep->tile_flags |= nvbo->kind << 8;
327 	else
328 	if (cli->device.info.family >= NV_DEVICE_INFO_V0_TESLA)
329 		rep->tile_flags |= nvbo->kind << 8 | nvbo->comp << 16;
330 	else
331 		rep->tile_flags |= nvbo->zeta;
332 	return 0;
333 }
334 
335 int
336 nouveau_gem_ioctl_new(struct drm_device *dev, void *data,
337 		      struct drm_file *file_priv)
338 {
339 	struct nouveau_cli *cli = nouveau_cli(file_priv);
340 	struct drm_nouveau_gem_new *req = data;
341 	struct nouveau_bo *nvbo = NULL;
342 	int ret = 0;
343 
344 	/* If uvmm wasn't initialized until now disable it completely to prevent
345 	 * userspace from mixing up UAPIs.
346 	 */
347 	nouveau_cli_disable_uvmm_noinit(cli);
348 
349 	ret = nouveau_gem_new(cli, req->info.size, req->align,
350 			      req->info.domain, req->info.tile_mode,
351 			      req->info.tile_flags, &nvbo);
352 	if (ret)
353 		return ret;
354 
355 	ret = drm_gem_handle_create(file_priv, &nvbo->bo.base,
356 				    &req->info.handle);
357 	if (ret == 0) {
358 		ret = nouveau_gem_info(file_priv, &nvbo->bo.base, &req->info);
359 		if (ret)
360 			drm_gem_handle_delete(file_priv, req->info.handle);
361 	}
362 
363 	/* drop reference from allocate - handle holds it now */
364 	drm_gem_object_put(&nvbo->bo.base);
365 	return ret;
366 }
367 
368 static int
369 nouveau_gem_set_domain(struct drm_gem_object *gem, uint32_t read_domains,
370 		       uint32_t write_domains, uint32_t valid_domains)
371 {
372 	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
373 	struct ttm_buffer_object *bo = &nvbo->bo;
374 	uint32_t domains = valid_domains & nvbo->valid_domains &
375 		(write_domains ? write_domains : read_domains);
376 	uint32_t pref_domains = 0;
377 
378 	if (!domains)
379 		return -EINVAL;
380 
381 	valid_domains &= ~(NOUVEAU_GEM_DOMAIN_VRAM | NOUVEAU_GEM_DOMAIN_GART);
382 
383 	if ((domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
384 	    bo->resource->mem_type == TTM_PL_VRAM)
385 		pref_domains |= NOUVEAU_GEM_DOMAIN_VRAM;
386 
387 	else if ((domains & NOUVEAU_GEM_DOMAIN_GART) &&
388 		 bo->resource->mem_type == TTM_PL_TT)
389 		pref_domains |= NOUVEAU_GEM_DOMAIN_GART;
390 
391 	else if (domains & NOUVEAU_GEM_DOMAIN_VRAM)
392 		pref_domains |= NOUVEAU_GEM_DOMAIN_VRAM;
393 
394 	else
395 		pref_domains |= NOUVEAU_GEM_DOMAIN_GART;
396 
397 	nouveau_bo_placement_set(nvbo, pref_domains, valid_domains);
398 
399 	return 0;
400 }
401 
402 struct validate_op {
403 	struct list_head list;
404 	struct ww_acquire_ctx ticket;
405 };
406 
407 static void
408 validate_fini_no_ticket(struct validate_op *op, struct nouveau_channel *chan,
409 			struct nouveau_fence *fence,
410 			struct drm_nouveau_gem_pushbuf_bo *pbbo)
411 {
412 	struct nouveau_bo *nvbo;
413 	struct drm_nouveau_gem_pushbuf_bo *b;
414 
415 	while (!list_empty(&op->list)) {
416 		nvbo = list_entry(op->list.next, struct nouveau_bo, entry);
417 		b = &pbbo[nvbo->pbbo_index];
418 
419 		if (likely(fence)) {
420 			nouveau_bo_fence(nvbo, fence, !!b->write_domains);
421 
422 			if (chan->vmm->vmm.object.oclass >= NVIF_CLASS_VMM_NV50) {
423 				struct nouveau_vma *vma =
424 					(void *)(unsigned long)b->user_priv;
425 				nouveau_fence_unref(&vma->fence);
426 				dma_fence_get(&fence->base);
427 				vma->fence = fence;
428 			}
429 		}
430 
431 		if (unlikely(nvbo->validate_mapped)) {
432 			ttm_bo_kunmap(&nvbo->kmap);
433 			nvbo->validate_mapped = false;
434 		}
435 
436 		list_del(&nvbo->entry);
437 		nvbo->reserved_by = NULL;
438 		ttm_bo_unreserve(&nvbo->bo);
439 		drm_gem_object_put(&nvbo->bo.base);
440 	}
441 }
442 
443 static void
444 validate_fini(struct validate_op *op, struct nouveau_channel *chan,
445 	      struct nouveau_fence *fence,
446 	      struct drm_nouveau_gem_pushbuf_bo *pbbo)
447 {
448 	validate_fini_no_ticket(op, chan, fence, pbbo);
449 	ww_acquire_fini(&op->ticket);
450 }
451 
452 static int
453 validate_init(struct nouveau_channel *chan, struct drm_file *file_priv,
454 	      struct drm_nouveau_gem_pushbuf_bo *pbbo,
455 	      int nr_buffers, struct validate_op *op)
456 {
457 	struct nouveau_cli *cli = nouveau_cli(file_priv);
458 	int trycnt = 0;
459 	int ret = -EINVAL, i;
460 	struct nouveau_bo *res_bo = NULL;
461 	LIST_HEAD(gart_list);
462 	LIST_HEAD(vram_list);
463 	LIST_HEAD(both_list);
464 
465 	ww_acquire_init(&op->ticket, &reservation_ww_class);
466 retry:
467 	if (++trycnt > 100000) {
468 		NV_PRINTK(err, cli, "%s failed and gave up.\n", __func__);
469 		return -EINVAL;
470 	}
471 
472 	for (i = 0; i < nr_buffers; i++) {
473 		struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[i];
474 		struct drm_gem_object *gem;
475 		struct nouveau_bo *nvbo;
476 
477 		gem = drm_gem_object_lookup(file_priv, b->handle);
478 		if (!gem) {
479 			NV_PRINTK(err, cli, "Unknown handle 0x%08x\n", b->handle);
480 			ret = -ENOENT;
481 			break;
482 		}
483 		nvbo = nouveau_gem_object(gem);
484 		if (nvbo == res_bo) {
485 			res_bo = NULL;
486 			drm_gem_object_put(gem);
487 			continue;
488 		}
489 
490 		if (nvbo->reserved_by && nvbo->reserved_by == file_priv) {
491 			NV_PRINTK(err, cli, "multiple instances of buffer %d on "
492 				      "validation list\n", b->handle);
493 			drm_gem_object_put(gem);
494 			ret = -EINVAL;
495 			break;
496 		}
497 
498 		ret = ttm_bo_reserve(&nvbo->bo, true, false, &op->ticket);
499 		if (ret) {
500 			list_splice_tail_init(&vram_list, &op->list);
501 			list_splice_tail_init(&gart_list, &op->list);
502 			list_splice_tail_init(&both_list, &op->list);
503 			validate_fini_no_ticket(op, chan, NULL, NULL);
504 			if (unlikely(ret == -EDEADLK)) {
505 				ret = ttm_bo_reserve_slowpath(&nvbo->bo, true,
506 							      &op->ticket);
507 				if (!ret)
508 					res_bo = nvbo;
509 			}
510 			if (unlikely(ret)) {
511 				if (ret != -ERESTARTSYS)
512 					NV_PRINTK(err, cli, "fail reserve\n");
513 				break;
514 			}
515 		}
516 
517 		if (chan->vmm->vmm.object.oclass >= NVIF_CLASS_VMM_NV50) {
518 			struct nouveau_vmm *vmm = chan->vmm;
519 			struct nouveau_vma *vma = nouveau_vma_find(nvbo, vmm);
520 			if (!vma) {
521 				NV_PRINTK(err, cli, "vma not found!\n");
522 				ret = -EINVAL;
523 				break;
524 			}
525 
526 			b->user_priv = (uint64_t)(unsigned long)vma;
527 		} else {
528 			b->user_priv = (uint64_t)(unsigned long)nvbo;
529 		}
530 
531 		nvbo->reserved_by = file_priv;
532 		nvbo->pbbo_index = i;
533 		if ((b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
534 		    (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART))
535 			list_add_tail(&nvbo->entry, &both_list);
536 		else
537 		if (b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM)
538 			list_add_tail(&nvbo->entry, &vram_list);
539 		else
540 		if (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART)
541 			list_add_tail(&nvbo->entry, &gart_list);
542 		else {
543 			NV_PRINTK(err, cli, "invalid valid domains: 0x%08x\n",
544 				 b->valid_domains);
545 			list_add_tail(&nvbo->entry, &both_list);
546 			ret = -EINVAL;
547 			break;
548 		}
549 		if (nvbo == res_bo)
550 			goto retry;
551 	}
552 
553 	ww_acquire_done(&op->ticket);
554 	list_splice_tail(&vram_list, &op->list);
555 	list_splice_tail(&gart_list, &op->list);
556 	list_splice_tail(&both_list, &op->list);
557 	if (ret)
558 		validate_fini(op, chan, NULL, NULL);
559 	return ret;
560 
561 }
562 
563 static int
564 validate_list(struct nouveau_channel *chan, struct nouveau_cli *cli,
565 	      struct list_head *list, struct drm_nouveau_gem_pushbuf_bo *pbbo)
566 {
567 	struct nouveau_drm *drm = chan->drm;
568 	struct nouveau_bo *nvbo;
569 	int ret, relocs = 0;
570 
571 	list_for_each_entry(nvbo, list, entry) {
572 		struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[nvbo->pbbo_index];
573 
574 		ret = nouveau_gem_set_domain(&nvbo->bo.base, b->read_domains,
575 					     b->write_domains,
576 					     b->valid_domains);
577 		if (unlikely(ret)) {
578 			NV_PRINTK(err, cli, "fail set_domain\n");
579 			return ret;
580 		}
581 
582 		ret = nouveau_bo_validate(nvbo, true, false);
583 		if (unlikely(ret)) {
584 			if (ret != -ERESTARTSYS)
585 				NV_PRINTK(err, cli, "fail ttm_validate\n");
586 			return ret;
587 		}
588 
589 		ret = nouveau_fence_sync(nvbo, chan, !!b->write_domains, true);
590 		if (unlikely(ret)) {
591 			if (ret != -ERESTARTSYS)
592 				NV_PRINTK(err, cli, "fail post-validate sync\n");
593 			return ret;
594 		}
595 
596 		if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA) {
597 			if (nvbo->offset == b->presumed.offset &&
598 			    ((nvbo->bo.resource->mem_type == TTM_PL_VRAM &&
599 			      b->presumed.domain & NOUVEAU_GEM_DOMAIN_VRAM) ||
600 			     (nvbo->bo.resource->mem_type == TTM_PL_TT &&
601 			      b->presumed.domain & NOUVEAU_GEM_DOMAIN_GART)))
602 				continue;
603 
604 			if (nvbo->bo.resource->mem_type == TTM_PL_TT)
605 				b->presumed.domain = NOUVEAU_GEM_DOMAIN_GART;
606 			else
607 				b->presumed.domain = NOUVEAU_GEM_DOMAIN_VRAM;
608 			b->presumed.offset = nvbo->offset;
609 			b->presumed.valid = 0;
610 			relocs++;
611 		}
612 	}
613 
614 	return relocs;
615 }
616 
617 static int
618 nouveau_gem_pushbuf_validate(struct nouveau_channel *chan,
619 			     struct drm_file *file_priv,
620 			     struct drm_nouveau_gem_pushbuf_bo *pbbo,
621 			     int nr_buffers,
622 			     struct validate_op *op, bool *apply_relocs)
623 {
624 	struct nouveau_cli *cli = nouveau_cli(file_priv);
625 	int ret;
626 
627 	INIT_LIST_HEAD(&op->list);
628 
629 	if (nr_buffers == 0)
630 		return 0;
631 
632 	ret = validate_init(chan, file_priv, pbbo, nr_buffers, op);
633 	if (unlikely(ret)) {
634 		if (ret != -ERESTARTSYS)
635 			NV_PRINTK(err, cli, "validate_init\n");
636 		return ret;
637 	}
638 
639 	ret = validate_list(chan, cli, &op->list, pbbo);
640 	if (unlikely(ret < 0)) {
641 		if (ret != -ERESTARTSYS)
642 			NV_PRINTK(err, cli, "validating bo list\n");
643 		validate_fini(op, chan, NULL, NULL);
644 		return ret;
645 	} else if (ret > 0) {
646 		*apply_relocs = true;
647 	}
648 
649 	return 0;
650 }
651 
652 static int
653 nouveau_gem_pushbuf_reloc_apply(struct nouveau_cli *cli,
654 				struct drm_nouveau_gem_pushbuf *req,
655 				struct drm_nouveau_gem_pushbuf_reloc *reloc,
656 				struct drm_nouveau_gem_pushbuf_bo *bo)
657 {
658 	int ret = 0;
659 	unsigned i;
660 
661 	for (i = 0; i < req->nr_relocs; i++) {
662 		struct drm_nouveau_gem_pushbuf_reloc *r = &reloc[i];
663 		struct drm_nouveau_gem_pushbuf_bo *b;
664 		struct nouveau_bo *nvbo;
665 		uint32_t data;
666 		long lret;
667 
668 		if (unlikely(r->bo_index >= req->nr_buffers)) {
669 			NV_PRINTK(err, cli, "reloc bo index invalid\n");
670 			ret = -EINVAL;
671 			break;
672 		}
673 
674 		b = &bo[r->bo_index];
675 		if (b->presumed.valid)
676 			continue;
677 
678 		if (unlikely(r->reloc_bo_index >= req->nr_buffers)) {
679 			NV_PRINTK(err, cli, "reloc container bo index invalid\n");
680 			ret = -EINVAL;
681 			break;
682 		}
683 		nvbo = (void *)(unsigned long)bo[r->reloc_bo_index].user_priv;
684 
685 		if (unlikely(r->reloc_bo_offset + 4 >
686 			     nvbo->bo.base.size)) {
687 			NV_PRINTK(err, cli, "reloc outside of bo\n");
688 			ret = -EINVAL;
689 			break;
690 		}
691 
692 		if (!nvbo->kmap.virtual) {
693 			ret = ttm_bo_kmap(&nvbo->bo, 0, PFN_UP(nvbo->bo.base.size),
694 					  &nvbo->kmap);
695 			if (ret) {
696 				NV_PRINTK(err, cli, "failed kmap for reloc\n");
697 				break;
698 			}
699 			nvbo->validate_mapped = true;
700 		}
701 
702 		if (r->flags & NOUVEAU_GEM_RELOC_LOW)
703 			data = b->presumed.offset + r->data;
704 		else
705 		if (r->flags & NOUVEAU_GEM_RELOC_HIGH)
706 			data = (b->presumed.offset + r->data) >> 32;
707 		else
708 			data = r->data;
709 
710 		if (r->flags & NOUVEAU_GEM_RELOC_OR) {
711 			if (b->presumed.domain == NOUVEAU_GEM_DOMAIN_GART)
712 				data |= r->tor;
713 			else
714 				data |= r->vor;
715 		}
716 
717 		lret = dma_resv_wait_timeout(nvbo->bo.base.resv,
718 					     DMA_RESV_USAGE_BOOKKEEP,
719 					     false, 15 * HZ);
720 		if (!lret)
721 			ret = -EBUSY;
722 		else if (lret > 0)
723 			ret = 0;
724 		else
725 			ret = lret;
726 
727 		if (ret) {
728 			NV_PRINTK(err, cli, "reloc wait_idle failed: %d\n",
729 				  ret);
730 			break;
731 		}
732 
733 		nouveau_bo_wr32(nvbo, r->reloc_bo_offset >> 2, data);
734 	}
735 
736 	return ret;
737 }
738 
739 int
740 nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
741 			  struct drm_file *file_priv)
742 {
743 	struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv);
744 	struct nouveau_cli *cli = nouveau_cli(file_priv);
745 	struct nouveau_abi16_chan *temp;
746 	struct nouveau_drm *drm = nouveau_drm(dev);
747 	struct drm_nouveau_gem_pushbuf *req = data;
748 	struct drm_nouveau_gem_pushbuf_push *push;
749 	struct drm_nouveau_gem_pushbuf_reloc *reloc = NULL;
750 	struct drm_nouveau_gem_pushbuf_bo *bo;
751 	struct nouveau_channel *chan = NULL;
752 	struct validate_op op;
753 	struct nouveau_fence *fence = NULL;
754 	int i, j, ret = 0;
755 	bool do_reloc = false, sync = false;
756 
757 	if (unlikely(!abi16))
758 		return -ENOMEM;
759 
760 	if (unlikely(nouveau_cli_uvmm(cli)))
761 		return -ENOSYS;
762 
763 	list_for_each_entry(temp, &abi16->channels, head) {
764 		if (temp->chan->chid == req->channel) {
765 			chan = temp->chan;
766 			break;
767 		}
768 	}
769 
770 	if (!chan)
771 		return nouveau_abi16_put(abi16, -ENOENT);
772 	if (unlikely(atomic_read(&chan->killed)))
773 		return nouveau_abi16_put(abi16, -ENODEV);
774 
775 	sync = req->vram_available & NOUVEAU_GEM_PUSHBUF_SYNC;
776 
777 	req->vram_available = drm->gem.vram_available;
778 	req->gart_available = drm->gem.gart_available;
779 	if (unlikely(req->nr_push == 0))
780 		goto out_next;
781 
782 	if (unlikely(req->nr_push > NOUVEAU_GEM_MAX_PUSH)) {
783 		NV_PRINTK(err, cli, "pushbuf push count exceeds limit: %d max %d\n",
784 			 req->nr_push, NOUVEAU_GEM_MAX_PUSH);
785 		return nouveau_abi16_put(abi16, -EINVAL);
786 	}
787 
788 	if (unlikely(req->nr_buffers > NOUVEAU_GEM_MAX_BUFFERS)) {
789 		NV_PRINTK(err, cli, "pushbuf bo count exceeds limit: %d max %d\n",
790 			 req->nr_buffers, NOUVEAU_GEM_MAX_BUFFERS);
791 		return nouveau_abi16_put(abi16, -EINVAL);
792 	}
793 
794 	if (unlikely(req->nr_relocs > NOUVEAU_GEM_MAX_RELOCS)) {
795 		NV_PRINTK(err, cli, "pushbuf reloc count exceeds limit: %d max %d\n",
796 			 req->nr_relocs, NOUVEAU_GEM_MAX_RELOCS);
797 		return nouveau_abi16_put(abi16, -EINVAL);
798 	}
799 
800 	push = u_memcpya(req->push, req->nr_push, sizeof(*push));
801 	if (IS_ERR(push))
802 		return nouveau_abi16_put(abi16, PTR_ERR(push));
803 
804 	bo = u_memcpya(req->buffers, req->nr_buffers, sizeof(*bo));
805 	if (IS_ERR(bo)) {
806 		u_free(push);
807 		return nouveau_abi16_put(abi16, PTR_ERR(bo));
808 	}
809 
810 	/* Ensure all push buffers are on validate list */
811 	for (i = 0; i < req->nr_push; i++) {
812 		if (push[i].bo_index >= req->nr_buffers) {
813 			NV_PRINTK(err, cli, "push %d buffer not in list\n", i);
814 			ret = -EINVAL;
815 			goto out_prevalid;
816 		}
817 	}
818 
819 	/* Validate buffer list */
820 revalidate:
821 	ret = nouveau_gem_pushbuf_validate(chan, file_priv, bo,
822 					   req->nr_buffers, &op, &do_reloc);
823 	if (ret) {
824 		if (ret != -ERESTARTSYS)
825 			NV_PRINTK(err, cli, "validate: %d\n", ret);
826 		goto out_prevalid;
827 	}
828 
829 	/* Apply any relocations that are required */
830 	if (do_reloc) {
831 		if (!reloc) {
832 			validate_fini(&op, chan, NULL, bo);
833 			reloc = u_memcpya(req->relocs, req->nr_relocs, sizeof(*reloc));
834 			if (IS_ERR(reloc)) {
835 				ret = PTR_ERR(reloc);
836 				goto out_prevalid;
837 			}
838 
839 			goto revalidate;
840 		}
841 
842 		ret = nouveau_gem_pushbuf_reloc_apply(cli, req, reloc, bo);
843 		if (ret) {
844 			NV_PRINTK(err, cli, "reloc apply: %d\n", ret);
845 			goto out;
846 		}
847 	}
848 
849 	if (chan->dma.ib_max) {
850 		ret = nouveau_dma_wait(chan, req->nr_push + 1, 16);
851 		if (ret) {
852 			NV_PRINTK(err, cli, "nv50cal_space: %d\n", ret);
853 			goto out;
854 		}
855 
856 		for (i = 0; i < req->nr_push; i++) {
857 			struct nouveau_vma *vma = (void *)(unsigned long)
858 				bo[push[i].bo_index].user_priv;
859 			u64 addr = vma->addr + push[i].offset;
860 			u32 length = push[i].length & ~NOUVEAU_GEM_PUSHBUF_NO_PREFETCH;
861 			bool no_prefetch = push[i].length & NOUVEAU_GEM_PUSHBUF_NO_PREFETCH;
862 
863 			nv50_dma_push(chan, addr, length, no_prefetch);
864 		}
865 	} else
866 	if (drm->client.device.info.chipset >= 0x25) {
867 		ret = PUSH_WAIT(chan->chan.push, req->nr_push * 2);
868 		if (ret) {
869 			NV_PRINTK(err, cli, "cal_space: %d\n", ret);
870 			goto out;
871 		}
872 
873 		for (i = 0; i < req->nr_push; i++) {
874 			struct nouveau_bo *nvbo = (void *)(unsigned long)
875 				bo[push[i].bo_index].user_priv;
876 
877 			PUSH_CALL(chan->chan.push, nvbo->offset + push[i].offset);
878 			PUSH_DATA(chan->chan.push, 0);
879 		}
880 	} else {
881 		ret = PUSH_WAIT(chan->chan.push, req->nr_push * (2 + NOUVEAU_DMA_SKIPS));
882 		if (ret) {
883 			NV_PRINTK(err, cli, "jmp_space: %d\n", ret);
884 			goto out;
885 		}
886 
887 		for (i = 0; i < req->nr_push; i++) {
888 			struct nouveau_bo *nvbo = (void *)(unsigned long)
889 				bo[push[i].bo_index].user_priv;
890 			uint32_t cmd;
891 
892 			cmd = chan->push.addr + ((chan->dma.cur + 2) << 2);
893 			cmd |= 0x20000000;
894 			if (unlikely(cmd != req->suffix0)) {
895 				if (!nvbo->kmap.virtual) {
896 					ret = ttm_bo_kmap(&nvbo->bo, 0,
897 							  PFN_UP(nvbo->bo.base.size),
898 							  &nvbo->kmap);
899 					if (ret) {
900 						WIND_RING(chan);
901 						goto out;
902 					}
903 					nvbo->validate_mapped = true;
904 				}
905 
906 				nouveau_bo_wr32(nvbo, (push[i].offset +
907 						push[i].length - 8) / 4, cmd);
908 			}
909 
910 			PUSH_JUMP(chan->chan.push, nvbo->offset + push[i].offset);
911 			PUSH_DATA(chan->chan.push, 0);
912 			for (j = 0; j < NOUVEAU_DMA_SKIPS; j++)
913 				PUSH_DATA(chan->chan.push, 0);
914 		}
915 	}
916 
917 	ret = nouveau_fence_new(&fence, chan);
918 	if (ret) {
919 		NV_PRINTK(err, cli, "error fencing pushbuf: %d\n", ret);
920 		WIND_RING(chan);
921 		goto out;
922 	}
923 
924 	if (sync) {
925 		if (!(ret = nouveau_fence_wait(fence, false, false))) {
926 			if ((ret = dma_fence_get_status(&fence->base)) == 1)
927 				ret = 0;
928 		}
929 	}
930 
931 out:
932 	validate_fini(&op, chan, fence, bo);
933 	nouveau_fence_unref(&fence);
934 
935 	if (do_reloc) {
936 		struct drm_nouveau_gem_pushbuf_bo __user *upbbo =
937 			u64_to_user_ptr(req->buffers);
938 
939 		for (i = 0; i < req->nr_buffers; i++) {
940 			if (bo[i].presumed.valid)
941 				continue;
942 
943 			if (copy_to_user(&upbbo[i].presumed, &bo[i].presumed,
944 					 sizeof(bo[i].presumed))) {
945 				ret = -EFAULT;
946 				break;
947 			}
948 		}
949 	}
950 out_prevalid:
951 	if (!IS_ERR(reloc))
952 		u_free(reloc);
953 	u_free(bo);
954 	u_free(push);
955 
956 out_next:
957 	if (chan->dma.ib_max) {
958 		req->suffix0 = 0x00000000;
959 		req->suffix1 = 0x00000000;
960 	} else
961 	if (drm->client.device.info.chipset >= 0x25) {
962 		req->suffix0 = 0x00020000;
963 		req->suffix1 = 0x00000000;
964 	} else {
965 		req->suffix0 = 0x20000000 |
966 			      (chan->push.addr + ((chan->dma.cur + 2) << 2));
967 		req->suffix1 = 0x00000000;
968 	}
969 
970 	return nouveau_abi16_put(abi16, ret);
971 }
972 
973 int
974 nouveau_gem_ioctl_cpu_prep(struct drm_device *dev, void *data,
975 			   struct drm_file *file_priv)
976 {
977 	struct drm_nouveau_gem_cpu_prep *req = data;
978 	struct drm_gem_object *gem;
979 	struct nouveau_bo *nvbo;
980 	bool no_wait = !!(req->flags & NOUVEAU_GEM_CPU_PREP_NOWAIT);
981 	bool write = !!(req->flags & NOUVEAU_GEM_CPU_PREP_WRITE);
982 	long lret;
983 	int ret;
984 
985 	gem = drm_gem_object_lookup(file_priv, req->handle);
986 	if (!gem)
987 		return -ENOENT;
988 	nvbo = nouveau_gem_object(gem);
989 
990 	lret = dma_resv_wait_timeout(nvbo->bo.base.resv,
991 				     dma_resv_usage_rw(write), true,
992 				     no_wait ? 0 : 30 * HZ);
993 	if (!lret)
994 		ret = -EBUSY;
995 	else if (lret > 0)
996 		ret = 0;
997 	else
998 		ret = lret;
999 
1000 	nouveau_bo_sync_for_cpu(nvbo);
1001 	drm_gem_object_put(gem);
1002 
1003 	return ret;
1004 }
1005 
1006 int
1007 nouveau_gem_ioctl_cpu_fini(struct drm_device *dev, void *data,
1008 			   struct drm_file *file_priv)
1009 {
1010 	struct drm_nouveau_gem_cpu_fini *req = data;
1011 	struct drm_gem_object *gem;
1012 	struct nouveau_bo *nvbo;
1013 
1014 	gem = drm_gem_object_lookup(file_priv, req->handle);
1015 	if (!gem)
1016 		return -ENOENT;
1017 	nvbo = nouveau_gem_object(gem);
1018 
1019 	nouveau_bo_sync_for_device(nvbo);
1020 	drm_gem_object_put(gem);
1021 	return 0;
1022 }
1023 
1024 int
1025 nouveau_gem_ioctl_info(struct drm_device *dev, void *data,
1026 		       struct drm_file *file_priv)
1027 {
1028 	struct drm_nouveau_gem_info *req = data;
1029 	struct drm_gem_object *gem;
1030 	int ret;
1031 
1032 	gem = drm_gem_object_lookup(file_priv, req->handle);
1033 	if (!gem)
1034 		return -ENOENT;
1035 
1036 	ret = nouveau_gem_info(file_priv, gem, req);
1037 	drm_gem_object_put(gem);
1038 	return ret;
1039 }
1040 
1041