xref: /linux/drivers/gpu/drm/nouveau/nouveau_gem.c (revision 04eeb606a8383b306f4bc6991da8231b5f3924b0)
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 "nouveau_drm.h"
28 #include "nouveau_dma.h"
29 #include "nouveau_fence.h"
30 #include "nouveau_abi16.h"
31 
32 #include "nouveau_ttm.h"
33 #include "nouveau_gem.h"
34 
35 void
36 nouveau_gem_object_del(struct drm_gem_object *gem)
37 {
38 	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
39 	struct ttm_buffer_object *bo = &nvbo->bo;
40 
41 	if (gem->import_attach)
42 		drm_prime_gem_destroy(gem, nvbo->bo.sg);
43 
44 	drm_gem_object_release(gem);
45 
46 	/* reset filp so nouveau_bo_del_ttm() can test for it */
47 	gem->filp = NULL;
48 	ttm_bo_unref(&bo);
49 }
50 
51 int
52 nouveau_gem_object_open(struct drm_gem_object *gem, struct drm_file *file_priv)
53 {
54 	struct nouveau_cli *cli = nouveau_cli(file_priv);
55 	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
56 	struct nouveau_vma *vma;
57 	int ret;
58 
59 	if (!cli->vm)
60 		return 0;
61 
62 	ret = ttm_bo_reserve(&nvbo->bo, false, false, false, NULL);
63 	if (ret)
64 		return ret;
65 
66 	vma = nouveau_bo_vma_find(nvbo, cli->vm);
67 	if (!vma) {
68 		vma = kzalloc(sizeof(*vma), GFP_KERNEL);
69 		if (!vma) {
70 			ret = -ENOMEM;
71 			goto out;
72 		}
73 
74 		ret = nouveau_bo_vma_add(nvbo, cli->vm, vma);
75 		if (ret) {
76 			kfree(vma);
77 			goto out;
78 		}
79 	} else {
80 		vma->refcount++;
81 	}
82 
83 out:
84 	ttm_bo_unreserve(&nvbo->bo);
85 	return ret;
86 }
87 
88 static void
89 nouveau_gem_object_delete(void *data)
90 {
91 	struct nouveau_vma *vma = data;
92 	nouveau_vm_unmap(vma);
93 	nouveau_vm_put(vma);
94 	kfree(vma);
95 }
96 
97 static void
98 nouveau_gem_object_unmap(struct nouveau_bo *nvbo, struct nouveau_vma *vma)
99 {
100 	const bool mapped = nvbo->bo.mem.mem_type != TTM_PL_SYSTEM;
101 	struct reservation_object *resv = nvbo->bo.resv;
102 	struct reservation_object_list *fobj;
103 	struct fence *fence = NULL;
104 
105 	fobj = reservation_object_get_list(resv);
106 
107 	list_del(&vma->head);
108 
109 	if (fobj && fobj->shared_count > 1)
110 		ttm_bo_wait(&nvbo->bo, true, false, false);
111 	else if (fobj && fobj->shared_count == 1)
112 		fence = rcu_dereference_protected(fobj->shared[0],
113 						reservation_object_held(resv));
114 	else
115 		fence = reservation_object_get_excl(nvbo->bo.resv);
116 
117 	if (fence && mapped) {
118 		nouveau_fence_work(fence, nouveau_gem_object_delete, vma);
119 	} else {
120 		if (mapped)
121 			nouveau_vm_unmap(vma);
122 		nouveau_vm_put(vma);
123 		kfree(vma);
124 	}
125 }
126 
127 void
128 nouveau_gem_object_close(struct drm_gem_object *gem, struct drm_file *file_priv)
129 {
130 	struct nouveau_cli *cli = nouveau_cli(file_priv);
131 	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
132 	struct nouveau_vma *vma;
133 	int ret;
134 
135 	if (!cli->vm)
136 		return;
137 
138 	ret = ttm_bo_reserve(&nvbo->bo, false, false, false, NULL);
139 	if (ret)
140 		return;
141 
142 	vma = nouveau_bo_vma_find(nvbo, cli->vm);
143 	if (vma) {
144 		if (--vma->refcount == 0)
145 			nouveau_gem_object_unmap(nvbo, vma);
146 	}
147 	ttm_bo_unreserve(&nvbo->bo);
148 }
149 
150 int
151 nouveau_gem_new(struct drm_device *dev, int size, int align, uint32_t domain,
152 		uint32_t tile_mode, uint32_t tile_flags,
153 		struct nouveau_bo **pnvbo)
154 {
155 	struct nouveau_drm *drm = nouveau_drm(dev);
156 	struct nouveau_bo *nvbo;
157 	u32 flags = 0;
158 	int ret;
159 
160 	if (domain & NOUVEAU_GEM_DOMAIN_VRAM)
161 		flags |= TTM_PL_FLAG_VRAM;
162 	if (domain & NOUVEAU_GEM_DOMAIN_GART)
163 		flags |= TTM_PL_FLAG_TT;
164 	if (!flags || domain & NOUVEAU_GEM_DOMAIN_CPU)
165 		flags |= TTM_PL_FLAG_SYSTEM;
166 
167 	ret = nouveau_bo_new(dev, size, align, flags, tile_mode,
168 			     tile_flags, NULL, NULL, pnvbo);
169 	if (ret)
170 		return ret;
171 	nvbo = *pnvbo;
172 
173 	/* we restrict allowed domains on nv50+ to only the types
174 	 * that were requested at creation time.  not possibly on
175 	 * earlier chips without busting the ABI.
176 	 */
177 	nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_VRAM |
178 			      NOUVEAU_GEM_DOMAIN_GART;
179 	if (drm->device.info.family >= NV_DEVICE_INFO_V0_TESLA)
180 		nvbo->valid_domains &= domain;
181 
182 	/* Initialize the embedded gem-object. We return a single gem-reference
183 	 * to the caller, instead of a normal nouveau_bo ttm reference. */
184 	ret = drm_gem_object_init(dev, &nvbo->gem, nvbo->bo.mem.size);
185 	if (ret) {
186 		nouveau_bo_ref(NULL, pnvbo);
187 		return -ENOMEM;
188 	}
189 
190 	nvbo->bo.persistent_swap_storage = nvbo->gem.filp;
191 	return 0;
192 }
193 
194 static int
195 nouveau_gem_info(struct drm_file *file_priv, struct drm_gem_object *gem,
196 		 struct drm_nouveau_gem_info *rep)
197 {
198 	struct nouveau_cli *cli = nouveau_cli(file_priv);
199 	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
200 	struct nouveau_vma *vma;
201 
202 	if (nvbo->bo.mem.mem_type == TTM_PL_TT)
203 		rep->domain = NOUVEAU_GEM_DOMAIN_GART;
204 	else
205 		rep->domain = NOUVEAU_GEM_DOMAIN_VRAM;
206 
207 	rep->offset = nvbo->bo.offset;
208 	if (cli->vm) {
209 		vma = nouveau_bo_vma_find(nvbo, cli->vm);
210 		if (!vma)
211 			return -EINVAL;
212 
213 		rep->offset = vma->offset;
214 	}
215 
216 	rep->size = nvbo->bo.mem.num_pages << PAGE_SHIFT;
217 	rep->map_handle = drm_vma_node_offset_addr(&nvbo->bo.vma_node);
218 	rep->tile_mode = nvbo->tile_mode;
219 	rep->tile_flags = nvbo->tile_flags;
220 	return 0;
221 }
222 
223 int
224 nouveau_gem_ioctl_new(struct drm_device *dev, void *data,
225 		      struct drm_file *file_priv)
226 {
227 	struct nouveau_drm *drm = nouveau_drm(dev);
228 	struct nouveau_cli *cli = nouveau_cli(file_priv);
229 	struct nouveau_fb *pfb = nvkm_fb(&drm->device);
230 	struct drm_nouveau_gem_new *req = data;
231 	struct nouveau_bo *nvbo = NULL;
232 	int ret = 0;
233 
234 	if (!pfb->memtype_valid(pfb, req->info.tile_flags)) {
235 		NV_PRINTK(error, cli, "bad page flags: 0x%08x\n", req->info.tile_flags);
236 		return -EINVAL;
237 	}
238 
239 	ret = nouveau_gem_new(dev, req->info.size, req->align,
240 			      req->info.domain, req->info.tile_mode,
241 			      req->info.tile_flags, &nvbo);
242 	if (ret)
243 		return ret;
244 
245 	ret = drm_gem_handle_create(file_priv, &nvbo->gem, &req->info.handle);
246 	if (ret == 0) {
247 		ret = nouveau_gem_info(file_priv, &nvbo->gem, &req->info);
248 		if (ret)
249 			drm_gem_handle_delete(file_priv, req->info.handle);
250 	}
251 
252 	/* drop reference from allocate - handle holds it now */
253 	drm_gem_object_unreference_unlocked(&nvbo->gem);
254 	return ret;
255 }
256 
257 static int
258 nouveau_gem_set_domain(struct drm_gem_object *gem, uint32_t read_domains,
259 		       uint32_t write_domains, uint32_t valid_domains)
260 {
261 	struct nouveau_bo *nvbo = nouveau_gem_object(gem);
262 	struct ttm_buffer_object *bo = &nvbo->bo;
263 	uint32_t domains = valid_domains & nvbo->valid_domains &
264 		(write_domains ? write_domains : read_domains);
265 	uint32_t pref_flags = 0, valid_flags = 0;
266 
267 	if (!domains)
268 		return -EINVAL;
269 
270 	if (valid_domains & NOUVEAU_GEM_DOMAIN_VRAM)
271 		valid_flags |= TTM_PL_FLAG_VRAM;
272 
273 	if (valid_domains & NOUVEAU_GEM_DOMAIN_GART)
274 		valid_flags |= TTM_PL_FLAG_TT;
275 
276 	if ((domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
277 	    bo->mem.mem_type == TTM_PL_VRAM)
278 		pref_flags |= TTM_PL_FLAG_VRAM;
279 
280 	else if ((domains & NOUVEAU_GEM_DOMAIN_GART) &&
281 		 bo->mem.mem_type == TTM_PL_TT)
282 		pref_flags |= TTM_PL_FLAG_TT;
283 
284 	else if (domains & NOUVEAU_GEM_DOMAIN_VRAM)
285 		pref_flags |= TTM_PL_FLAG_VRAM;
286 
287 	else
288 		pref_flags |= TTM_PL_FLAG_TT;
289 
290 	nouveau_bo_placement_set(nvbo, pref_flags, valid_flags);
291 
292 	return 0;
293 }
294 
295 struct validate_op {
296 	struct list_head list;
297 	struct ww_acquire_ctx ticket;
298 };
299 
300 static void
301 validate_fini_no_ticket(struct validate_op *op, struct nouveau_fence *fence,
302 			struct drm_nouveau_gem_pushbuf_bo *pbbo)
303 {
304 	struct nouveau_bo *nvbo;
305 	struct drm_nouveau_gem_pushbuf_bo *b;
306 
307 	while (!list_empty(&op->list)) {
308 		nvbo = list_entry(op->list.next, struct nouveau_bo, entry);
309 		b = &pbbo[nvbo->pbbo_index];
310 
311 		if (likely(fence))
312 			nouveau_bo_fence(nvbo, fence, !!b->write_domains);
313 
314 		if (unlikely(nvbo->validate_mapped)) {
315 			ttm_bo_kunmap(&nvbo->kmap);
316 			nvbo->validate_mapped = false;
317 		}
318 
319 		list_del(&nvbo->entry);
320 		nvbo->reserved_by = NULL;
321 		ttm_bo_unreserve_ticket(&nvbo->bo, &op->ticket);
322 		drm_gem_object_unreference_unlocked(&nvbo->gem);
323 	}
324 }
325 
326 static void
327 validate_fini(struct validate_op *op, struct nouveau_fence *fence,
328 	      struct drm_nouveau_gem_pushbuf_bo *pbbo)
329 {
330 	validate_fini_no_ticket(op, fence, pbbo);
331 	ww_acquire_fini(&op->ticket);
332 }
333 
334 static int
335 validate_init(struct nouveau_channel *chan, struct drm_file *file_priv,
336 	      struct drm_nouveau_gem_pushbuf_bo *pbbo,
337 	      int nr_buffers, struct validate_op *op)
338 {
339 	struct nouveau_cli *cli = nouveau_cli(file_priv);
340 	struct drm_device *dev = chan->drm->dev;
341 	int trycnt = 0;
342 	int ret, i;
343 	struct nouveau_bo *res_bo = NULL;
344 	LIST_HEAD(gart_list);
345 	LIST_HEAD(vram_list);
346 	LIST_HEAD(both_list);
347 
348 	ww_acquire_init(&op->ticket, &reservation_ww_class);
349 retry:
350 	if (++trycnt > 100000) {
351 		NV_PRINTK(error, cli, "%s failed and gave up.\n", __func__);
352 		return -EINVAL;
353 	}
354 
355 	for (i = 0; i < nr_buffers; i++) {
356 		struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[i];
357 		struct drm_gem_object *gem;
358 		struct nouveau_bo *nvbo;
359 
360 		gem = drm_gem_object_lookup(dev, file_priv, b->handle);
361 		if (!gem) {
362 			NV_PRINTK(error, cli, "Unknown handle 0x%08x\n", b->handle);
363 			ret = -ENOENT;
364 			break;
365 		}
366 		nvbo = nouveau_gem_object(gem);
367 		if (nvbo == res_bo) {
368 			res_bo = NULL;
369 			drm_gem_object_unreference_unlocked(gem);
370 			continue;
371 		}
372 
373 		if (nvbo->reserved_by && nvbo->reserved_by == file_priv) {
374 			NV_PRINTK(error, cli, "multiple instances of buffer %d on "
375 				      "validation list\n", b->handle);
376 			drm_gem_object_unreference_unlocked(gem);
377 			ret = -EINVAL;
378 			break;
379 		}
380 
381 		ret = ttm_bo_reserve(&nvbo->bo, true, false, true, &op->ticket);
382 		if (ret) {
383 			list_splice_tail_init(&vram_list, &op->list);
384 			list_splice_tail_init(&gart_list, &op->list);
385 			list_splice_tail_init(&both_list, &op->list);
386 			validate_fini_no_ticket(op, NULL, NULL);
387 			if (unlikely(ret == -EDEADLK)) {
388 				ret = ttm_bo_reserve_slowpath(&nvbo->bo, true,
389 							      &op->ticket);
390 				if (!ret)
391 					res_bo = nvbo;
392 			}
393 			if (unlikely(ret)) {
394 				if (ret != -ERESTARTSYS)
395 					NV_PRINTK(error, cli, "fail reserve\n");
396 				break;
397 			}
398 		}
399 
400 		b->user_priv = (uint64_t)(unsigned long)nvbo;
401 		nvbo->reserved_by = file_priv;
402 		nvbo->pbbo_index = i;
403 		if ((b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
404 		    (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART))
405 			list_add_tail(&nvbo->entry, &both_list);
406 		else
407 		if (b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM)
408 			list_add_tail(&nvbo->entry, &vram_list);
409 		else
410 		if (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART)
411 			list_add_tail(&nvbo->entry, &gart_list);
412 		else {
413 			NV_PRINTK(error, cli, "invalid valid domains: 0x%08x\n",
414 				 b->valid_domains);
415 			list_add_tail(&nvbo->entry, &both_list);
416 			ret = -EINVAL;
417 			break;
418 		}
419 		if (nvbo == res_bo)
420 			goto retry;
421 	}
422 
423 	ww_acquire_done(&op->ticket);
424 	list_splice_tail(&vram_list, &op->list);
425 	list_splice_tail(&gart_list, &op->list);
426 	list_splice_tail(&both_list, &op->list);
427 	if (ret)
428 		validate_fini(op, NULL, NULL);
429 	return ret;
430 
431 }
432 
433 static int
434 validate_list(struct nouveau_channel *chan, struct nouveau_cli *cli,
435 	      struct list_head *list, struct drm_nouveau_gem_pushbuf_bo *pbbo,
436 	      uint64_t user_pbbo_ptr)
437 {
438 	struct nouveau_drm *drm = chan->drm;
439 	struct drm_nouveau_gem_pushbuf_bo __user *upbbo =
440 				(void __force __user *)(uintptr_t)user_pbbo_ptr;
441 	struct nouveau_bo *nvbo;
442 	int ret, relocs = 0;
443 
444 	list_for_each_entry(nvbo, list, entry) {
445 		struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[nvbo->pbbo_index];
446 
447 		ret = nouveau_gem_set_domain(&nvbo->gem, b->read_domains,
448 					     b->write_domains,
449 					     b->valid_domains);
450 		if (unlikely(ret)) {
451 			NV_PRINTK(error, cli, "fail set_domain\n");
452 			return ret;
453 		}
454 
455 		ret = nouveau_bo_validate(nvbo, true, false);
456 		if (unlikely(ret)) {
457 			if (ret != -ERESTARTSYS)
458 				NV_PRINTK(error, cli, "fail ttm_validate\n");
459 			return ret;
460 		}
461 
462 		ret = nouveau_fence_sync(nvbo, chan, !!b->write_domains, true);
463 		if (unlikely(ret)) {
464 			if (ret != -ERESTARTSYS)
465 				NV_PRINTK(error, cli, "fail post-validate sync\n");
466 			return ret;
467 		}
468 
469 		if (drm->device.info.family < NV_DEVICE_INFO_V0_TESLA) {
470 			if (nvbo->bo.offset == b->presumed.offset &&
471 			    ((nvbo->bo.mem.mem_type == TTM_PL_VRAM &&
472 			      b->presumed.domain & NOUVEAU_GEM_DOMAIN_VRAM) ||
473 			     (nvbo->bo.mem.mem_type == TTM_PL_TT &&
474 			      b->presumed.domain & NOUVEAU_GEM_DOMAIN_GART)))
475 				continue;
476 
477 			if (nvbo->bo.mem.mem_type == TTM_PL_TT)
478 				b->presumed.domain = NOUVEAU_GEM_DOMAIN_GART;
479 			else
480 				b->presumed.domain = NOUVEAU_GEM_DOMAIN_VRAM;
481 			b->presumed.offset = nvbo->bo.offset;
482 			b->presumed.valid = 0;
483 			relocs++;
484 
485 			if (copy_to_user(&upbbo[nvbo->pbbo_index].presumed,
486 					     &b->presumed, sizeof(b->presumed)))
487 				return -EFAULT;
488 		}
489 	}
490 
491 	return relocs;
492 }
493 
494 static int
495 nouveau_gem_pushbuf_validate(struct nouveau_channel *chan,
496 			     struct drm_file *file_priv,
497 			     struct drm_nouveau_gem_pushbuf_bo *pbbo,
498 			     uint64_t user_buffers, int nr_buffers,
499 			     struct validate_op *op, int *apply_relocs)
500 {
501 	struct nouveau_cli *cli = nouveau_cli(file_priv);
502 	int ret;
503 
504 	INIT_LIST_HEAD(&op->list);
505 
506 	if (nr_buffers == 0)
507 		return 0;
508 
509 	ret = validate_init(chan, file_priv, pbbo, nr_buffers, op);
510 	if (unlikely(ret)) {
511 		if (ret != -ERESTARTSYS)
512 			NV_PRINTK(error, cli, "validate_init\n");
513 		return ret;
514 	}
515 
516 	ret = validate_list(chan, cli, &op->list, pbbo, user_buffers);
517 	if (unlikely(ret < 0)) {
518 		if (ret != -ERESTARTSYS)
519 			NV_PRINTK(error, cli, "validating bo list\n");
520 		validate_fini(op, NULL, NULL);
521 		return ret;
522 	}
523 	*apply_relocs = ret;
524 	return 0;
525 }
526 
527 static inline void
528 u_free(void *addr)
529 {
530 	if (!is_vmalloc_addr(addr))
531 		kfree(addr);
532 	else
533 		vfree(addr);
534 }
535 
536 static inline void *
537 u_memcpya(uint64_t user, unsigned nmemb, unsigned size)
538 {
539 	void *mem;
540 	void __user *userptr = (void __force __user *)(uintptr_t)user;
541 
542 	size *= nmemb;
543 
544 	mem = kmalloc(size, GFP_KERNEL | __GFP_NOWARN);
545 	if (!mem)
546 		mem = vmalloc(size);
547 	if (!mem)
548 		return ERR_PTR(-ENOMEM);
549 
550 	if (copy_from_user(mem, userptr, size)) {
551 		u_free(mem);
552 		return ERR_PTR(-EFAULT);
553 	}
554 
555 	return mem;
556 }
557 
558 static int
559 nouveau_gem_pushbuf_reloc_apply(struct nouveau_cli *cli,
560 				struct drm_nouveau_gem_pushbuf *req,
561 				struct drm_nouveau_gem_pushbuf_bo *bo)
562 {
563 	struct drm_nouveau_gem_pushbuf_reloc *reloc = NULL;
564 	int ret = 0;
565 	unsigned i;
566 
567 	reloc = u_memcpya(req->relocs, req->nr_relocs, sizeof(*reloc));
568 	if (IS_ERR(reloc))
569 		return PTR_ERR(reloc);
570 
571 	for (i = 0; i < req->nr_relocs; i++) {
572 		struct drm_nouveau_gem_pushbuf_reloc *r = &reloc[i];
573 		struct drm_nouveau_gem_pushbuf_bo *b;
574 		struct nouveau_bo *nvbo;
575 		uint32_t data;
576 
577 		if (unlikely(r->bo_index > req->nr_buffers)) {
578 			NV_PRINTK(error, cli, "reloc bo index invalid\n");
579 			ret = -EINVAL;
580 			break;
581 		}
582 
583 		b = &bo[r->bo_index];
584 		if (b->presumed.valid)
585 			continue;
586 
587 		if (unlikely(r->reloc_bo_index > req->nr_buffers)) {
588 			NV_PRINTK(error, cli, "reloc container bo index invalid\n");
589 			ret = -EINVAL;
590 			break;
591 		}
592 		nvbo = (void *)(unsigned long)bo[r->reloc_bo_index].user_priv;
593 
594 		if (unlikely(r->reloc_bo_offset + 4 >
595 			     nvbo->bo.mem.num_pages << PAGE_SHIFT)) {
596 			NV_PRINTK(error, cli, "reloc outside of bo\n");
597 			ret = -EINVAL;
598 			break;
599 		}
600 
601 		if (!nvbo->kmap.virtual) {
602 			ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.mem.num_pages,
603 					  &nvbo->kmap);
604 			if (ret) {
605 				NV_PRINTK(error, cli, "failed kmap for reloc\n");
606 				break;
607 			}
608 			nvbo->validate_mapped = true;
609 		}
610 
611 		if (r->flags & NOUVEAU_GEM_RELOC_LOW)
612 			data = b->presumed.offset + r->data;
613 		else
614 		if (r->flags & NOUVEAU_GEM_RELOC_HIGH)
615 			data = (b->presumed.offset + r->data) >> 32;
616 		else
617 			data = r->data;
618 
619 		if (r->flags & NOUVEAU_GEM_RELOC_OR) {
620 			if (b->presumed.domain == NOUVEAU_GEM_DOMAIN_GART)
621 				data |= r->tor;
622 			else
623 				data |= r->vor;
624 		}
625 
626 		ret = ttm_bo_wait(&nvbo->bo, true, false, false);
627 		if (ret) {
628 			NV_PRINTK(error, cli, "reloc wait_idle failed: %d\n", ret);
629 			break;
630 		}
631 
632 		nouveau_bo_wr32(nvbo, r->reloc_bo_offset >> 2, data);
633 	}
634 
635 	u_free(reloc);
636 	return ret;
637 }
638 
639 int
640 nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
641 			  struct drm_file *file_priv)
642 {
643 	struct nouveau_abi16 *abi16 = nouveau_abi16_get(file_priv, dev);
644 	struct nouveau_cli *cli = nouveau_cli(file_priv);
645 	struct nouveau_abi16_chan *temp;
646 	struct nouveau_drm *drm = nouveau_drm(dev);
647 	struct drm_nouveau_gem_pushbuf *req = data;
648 	struct drm_nouveau_gem_pushbuf_push *push;
649 	struct drm_nouveau_gem_pushbuf_bo *bo;
650 	struct nouveau_channel *chan = NULL;
651 	struct validate_op op;
652 	struct nouveau_fence *fence = NULL;
653 	int i, j, ret = 0, do_reloc = 0;
654 
655 	if (unlikely(!abi16))
656 		return -ENOMEM;
657 
658 	list_for_each_entry(temp, &abi16->channels, head) {
659 		if (temp->chan->object->handle == (NVDRM_CHAN | req->channel)) {
660 			chan = temp->chan;
661 			break;
662 		}
663 	}
664 
665 	if (!chan)
666 		return nouveau_abi16_put(abi16, -ENOENT);
667 
668 	req->vram_available = drm->gem.vram_available;
669 	req->gart_available = drm->gem.gart_available;
670 	if (unlikely(req->nr_push == 0))
671 		goto out_next;
672 
673 	if (unlikely(req->nr_push > NOUVEAU_GEM_MAX_PUSH)) {
674 		NV_PRINTK(error, cli, "pushbuf push count exceeds limit: %d max %d\n",
675 			 req->nr_push, NOUVEAU_GEM_MAX_PUSH);
676 		return nouveau_abi16_put(abi16, -EINVAL);
677 	}
678 
679 	if (unlikely(req->nr_buffers > NOUVEAU_GEM_MAX_BUFFERS)) {
680 		NV_PRINTK(error, cli, "pushbuf bo count exceeds limit: %d max %d\n",
681 			 req->nr_buffers, NOUVEAU_GEM_MAX_BUFFERS);
682 		return nouveau_abi16_put(abi16, -EINVAL);
683 	}
684 
685 	if (unlikely(req->nr_relocs > NOUVEAU_GEM_MAX_RELOCS)) {
686 		NV_PRINTK(error, cli, "pushbuf reloc count exceeds limit: %d max %d\n",
687 			 req->nr_relocs, NOUVEAU_GEM_MAX_RELOCS);
688 		return nouveau_abi16_put(abi16, -EINVAL);
689 	}
690 
691 	push = u_memcpya(req->push, req->nr_push, sizeof(*push));
692 	if (IS_ERR(push))
693 		return nouveau_abi16_put(abi16, PTR_ERR(push));
694 
695 	bo = u_memcpya(req->buffers, req->nr_buffers, sizeof(*bo));
696 	if (IS_ERR(bo)) {
697 		u_free(push);
698 		return nouveau_abi16_put(abi16, PTR_ERR(bo));
699 	}
700 
701 	/* Ensure all push buffers are on validate list */
702 	for (i = 0; i < req->nr_push; i++) {
703 		if (push[i].bo_index >= req->nr_buffers) {
704 			NV_PRINTK(error, cli, "push %d buffer not in list\n", i);
705 			ret = -EINVAL;
706 			goto out_prevalid;
707 		}
708 	}
709 
710 	/* Validate buffer list */
711 	ret = nouveau_gem_pushbuf_validate(chan, file_priv, bo, req->buffers,
712 					   req->nr_buffers, &op, &do_reloc);
713 	if (ret) {
714 		if (ret != -ERESTARTSYS)
715 			NV_PRINTK(error, cli, "validate: %d\n", ret);
716 		goto out_prevalid;
717 	}
718 
719 	/* Apply any relocations that are required */
720 	if (do_reloc) {
721 		ret = nouveau_gem_pushbuf_reloc_apply(cli, req, bo);
722 		if (ret) {
723 			NV_PRINTK(error, cli, "reloc apply: %d\n", ret);
724 			goto out;
725 		}
726 	}
727 
728 	if (chan->dma.ib_max) {
729 		ret = nouveau_dma_wait(chan, req->nr_push + 1, 16);
730 		if (ret) {
731 			NV_PRINTK(error, cli, "nv50cal_space: %d\n", ret);
732 			goto out;
733 		}
734 
735 		for (i = 0; i < req->nr_push; i++) {
736 			struct nouveau_bo *nvbo = (void *)(unsigned long)
737 				bo[push[i].bo_index].user_priv;
738 
739 			nv50_dma_push(chan, nvbo, push[i].offset,
740 				      push[i].length);
741 		}
742 	} else
743 	if (drm->device.info.chipset >= 0x25) {
744 		ret = RING_SPACE(chan, req->nr_push * 2);
745 		if (ret) {
746 			NV_PRINTK(error, cli, "cal_space: %d\n", ret);
747 			goto out;
748 		}
749 
750 		for (i = 0; i < req->nr_push; i++) {
751 			struct nouveau_bo *nvbo = (void *)(unsigned long)
752 				bo[push[i].bo_index].user_priv;
753 
754 			OUT_RING(chan, (nvbo->bo.offset + push[i].offset) | 2);
755 			OUT_RING(chan, 0);
756 		}
757 	} else {
758 		ret = RING_SPACE(chan, req->nr_push * (2 + NOUVEAU_DMA_SKIPS));
759 		if (ret) {
760 			NV_PRINTK(error, cli, "jmp_space: %d\n", ret);
761 			goto out;
762 		}
763 
764 		for (i = 0; i < req->nr_push; i++) {
765 			struct nouveau_bo *nvbo = (void *)(unsigned long)
766 				bo[push[i].bo_index].user_priv;
767 			uint32_t cmd;
768 
769 			cmd = chan->push.vma.offset + ((chan->dma.cur + 2) << 2);
770 			cmd |= 0x20000000;
771 			if (unlikely(cmd != req->suffix0)) {
772 				if (!nvbo->kmap.virtual) {
773 					ret = ttm_bo_kmap(&nvbo->bo, 0,
774 							  nvbo->bo.mem.
775 							  num_pages,
776 							  &nvbo->kmap);
777 					if (ret) {
778 						WIND_RING(chan);
779 						goto out;
780 					}
781 					nvbo->validate_mapped = true;
782 				}
783 
784 				nouveau_bo_wr32(nvbo, (push[i].offset +
785 						push[i].length - 8) / 4, cmd);
786 			}
787 
788 			OUT_RING(chan, 0x20000000 |
789 				      (nvbo->bo.offset + push[i].offset));
790 			OUT_RING(chan, 0);
791 			for (j = 0; j < NOUVEAU_DMA_SKIPS; j++)
792 				OUT_RING(chan, 0);
793 		}
794 	}
795 
796 	ret = nouveau_fence_new(chan, false, &fence);
797 	if (ret) {
798 		NV_PRINTK(error, cli, "error fencing pushbuf: %d\n", ret);
799 		WIND_RING(chan);
800 		goto out;
801 	}
802 
803 out:
804 	validate_fini(&op, fence, bo);
805 	nouveau_fence_unref(&fence);
806 
807 out_prevalid:
808 	u_free(bo);
809 	u_free(push);
810 
811 out_next:
812 	if (chan->dma.ib_max) {
813 		req->suffix0 = 0x00000000;
814 		req->suffix1 = 0x00000000;
815 	} else
816 	if (drm->device.info.chipset >= 0x25) {
817 		req->suffix0 = 0x00020000;
818 		req->suffix1 = 0x00000000;
819 	} else {
820 		req->suffix0 = 0x20000000 |
821 			      (chan->push.vma.offset + ((chan->dma.cur + 2) << 2));
822 		req->suffix1 = 0x00000000;
823 	}
824 
825 	return nouveau_abi16_put(abi16, ret);
826 }
827 
828 static inline uint32_t
829 domain_to_ttm(struct nouveau_bo *nvbo, uint32_t domain)
830 {
831 	uint32_t flags = 0;
832 
833 	if (domain & NOUVEAU_GEM_DOMAIN_VRAM)
834 		flags |= TTM_PL_FLAG_VRAM;
835 	if (domain & NOUVEAU_GEM_DOMAIN_GART)
836 		flags |= TTM_PL_FLAG_TT;
837 
838 	return flags;
839 }
840 
841 int
842 nouveau_gem_ioctl_cpu_prep(struct drm_device *dev, void *data,
843 			   struct drm_file *file_priv)
844 {
845 	struct drm_nouveau_gem_cpu_prep *req = data;
846 	struct drm_gem_object *gem;
847 	struct nouveau_bo *nvbo;
848 	bool no_wait = !!(req->flags & NOUVEAU_GEM_CPU_PREP_NOWAIT);
849 	bool write = !!(req->flags & NOUVEAU_GEM_CPU_PREP_WRITE);
850 	int ret;
851 
852 	gem = drm_gem_object_lookup(dev, file_priv, req->handle);
853 	if (!gem)
854 		return -ENOENT;
855 	nvbo = nouveau_gem_object(gem);
856 
857 	if (no_wait)
858 		ret = reservation_object_test_signaled_rcu(nvbo->bo.resv, write) ? 0 : -EBUSY;
859 	else {
860 		long lret;
861 
862 		lret = reservation_object_wait_timeout_rcu(nvbo->bo.resv, write, true, 30 * HZ);
863 		if (!lret)
864 			ret = -EBUSY;
865 		else if (lret > 0)
866 			ret = 0;
867 		else
868 			ret = lret;
869 	}
870 	drm_gem_object_unreference_unlocked(gem);
871 
872 	return ret;
873 }
874 
875 int
876 nouveau_gem_ioctl_cpu_fini(struct drm_device *dev, void *data,
877 			   struct drm_file *file_priv)
878 {
879 	return 0;
880 }
881 
882 int
883 nouveau_gem_ioctl_info(struct drm_device *dev, void *data,
884 		       struct drm_file *file_priv)
885 {
886 	struct drm_nouveau_gem_info *req = data;
887 	struct drm_gem_object *gem;
888 	int ret;
889 
890 	gem = drm_gem_object_lookup(dev, file_priv, req->handle);
891 	if (!gem)
892 		return -ENOENT;
893 
894 	ret = nouveau_gem_info(file_priv, gem, req);
895 	drm_gem_object_unreference_unlocked(gem);
896 	return ret;
897 }
898 
899