xref: /dflybsd-src/sys/dev/drm/radeon/radeon_gem.c (revision 25ca8c794df06033ca37cb3fdf9b2992a7b5a9e6)
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  * $FreeBSD: head/sys/dev/drm2/radeon/radeon_gem.c 254885 2013-08-25 19:37:15Z dumbbell $
29  */
30 
31 #include <drm/drmP.h>
32 #include <uapi_drm/radeon_drm.h>
33 #include "radeon.h"
34 #include "radeon_gem.h"
35 
36 void radeon_gem_object_free(struct drm_gem_object *gobj)
37 {
38 	struct radeon_bo *robj = gem_to_radeon_bo(gobj);
39 
40 	if (robj) {
41 #ifdef DUMBBELL_WIP
42 		if (robj->gem_base.import_attach)
43 			drm_prime_gem_destroy(&robj->gem_base, robj->tbo.sg);
44 #endif /* DUMBBELL_WIP */
45 		radeon_bo_unref(&robj);
46 	}
47 }
48 
49 int radeon_gem_object_create(struct radeon_device *rdev, int size,
50 				int alignment, int initial_domain,
51 				bool discardable, bool kernel,
52 				struct drm_gem_object **obj)
53 {
54 	struct radeon_bo *robj;
55 	unsigned long max_size;
56 	int r;
57 
58 	*obj = NULL;
59 	/* At least align on page size */
60 	if (alignment < PAGE_SIZE) {
61 		alignment = PAGE_SIZE;
62 	}
63 
64 	/* maximun bo size is the minimun btw visible vram and gtt size */
65 	max_size = min(rdev->mc.visible_vram_size, rdev->mc.gtt_size);
66 	if (size > max_size) {
67 		printk(KERN_WARNING "%s:%d alloc size %dMb bigger than %ldMb limit\n",
68 		       __func__, __LINE__, size >> 20, max_size >> 20);
69 		return -ENOMEM;
70 	}
71 
72 retry:
73 	r = radeon_bo_create(rdev, size, alignment, kernel, initial_domain, NULL, &robj);
74 	if (r) {
75 		if (r != -ERESTARTSYS) {
76 			if (initial_domain == RADEON_GEM_DOMAIN_VRAM) {
77 				initial_domain |= RADEON_GEM_DOMAIN_GTT;
78 				goto retry;
79 			}
80 			DRM_ERROR("Failed to allocate GEM object (%d, %d, %u, %d)\n",
81 				  size, initial_domain, alignment, r);
82 		}
83 		return r;
84 	}
85 	*obj = &robj->gem_base;
86 	robj->pid = curproc ? curproc->p_pid : 0;
87 
88 	spin_lock(&rdev->gem.mutex);
89 	list_add_tail(&robj->list, &rdev->gem.objects);
90 	spin_unlock(&rdev->gem.mutex);
91 
92 	return 0;
93 }
94 
95 static int radeon_gem_set_domain(struct drm_gem_object *gobj,
96 			  uint32_t rdomain, uint32_t wdomain)
97 {
98 	struct radeon_bo *robj;
99 	uint32_t domain;
100 	int r;
101 
102 	/* FIXME: reeimplement */
103 	robj = gem_to_radeon_bo(gobj);
104 	/* work out where to validate the buffer to */
105 	domain = wdomain;
106 	if (!domain) {
107 		domain = rdomain;
108 	}
109 	if (!domain) {
110 		/* Do nothings */
111 		printk(KERN_WARNING "Set domain without domain !\n");
112 		return 0;
113 	}
114 	if (domain == RADEON_GEM_DOMAIN_CPU) {
115 		/* Asking for cpu access wait for object idle */
116 		r = radeon_bo_wait(robj, NULL, false);
117 		if (r) {
118 			printk(KERN_ERR "Failed to wait for object !\n");
119 			return r;
120 		}
121 	}
122 	return 0;
123 }
124 
125 int radeon_gem_init(struct radeon_device *rdev)
126 {
127 	INIT_LIST_HEAD(&rdev->gem.objects);
128 	return 0;
129 }
130 
131 void radeon_gem_fini(struct radeon_device *rdev)
132 {
133 	radeon_bo_force_delete(rdev);
134 }
135 
136 /*
137  * Call from drm_gem_handle_create which appear in both new and open ioctl
138  * case.
139  */
140 int radeon_gem_object_open(struct drm_gem_object *obj, struct drm_file *file_priv)
141 {
142 	struct radeon_bo *rbo = gem_to_radeon_bo(obj);
143 	struct radeon_device *rdev = rbo->rdev;
144 	struct radeon_fpriv *fpriv = file_priv->driver_priv;
145 	struct radeon_vm *vm = &fpriv->vm;
146 	struct radeon_bo_va *bo_va;
147 	int r;
148 
149 	if (rdev->family < CHIP_CAYMAN) {
150 		return 0;
151 	}
152 
153 	r = radeon_bo_reserve(rbo, false);
154 	if (r) {
155 		return r;
156 	}
157 
158 	bo_va = radeon_vm_bo_find(vm, rbo);
159 	if (!bo_va) {
160 		bo_va = radeon_vm_bo_add(rdev, vm, rbo);
161 	} else {
162 		++bo_va->ref_count;
163 	}
164 	radeon_bo_unreserve(rbo);
165 
166 	return 0;
167 }
168 
169 void radeon_gem_object_close(struct drm_gem_object *obj,
170 			     struct drm_file *file_priv)
171 {
172 	struct radeon_bo *rbo = gem_to_radeon_bo(obj);
173 	struct radeon_device *rdev = rbo->rdev;
174 	struct radeon_fpriv *fpriv = file_priv->driver_priv;
175 	struct radeon_vm *vm = &fpriv->vm;
176 	struct radeon_bo_va *bo_va;
177 	int r;
178 
179 	if (rdev->family < CHIP_CAYMAN) {
180 		return;
181 	}
182 
183 	r = radeon_bo_reserve(rbo, true);
184 	if (r) {
185 		dev_err(rdev->dev, "leaking bo va because "
186 			"we fail to reserve bo (%d)\n", r);
187 		return;
188 	}
189 	bo_va = radeon_vm_bo_find(vm, rbo);
190 	if (bo_va) {
191 		if (--bo_va->ref_count == 0) {
192 			radeon_vm_bo_rmv(rdev, bo_va);
193 		}
194 	}
195 	radeon_bo_unreserve(rbo);
196 }
197 
198 static int radeon_gem_handle_lockup(struct radeon_device *rdev, int r)
199 {
200 	if (r == -EDEADLK) {
201 		r = radeon_gpu_reset(rdev);
202 		if (!r)
203 			r = -EAGAIN;
204 	}
205 	return r;
206 }
207 
208 /*
209  * GEM ioctls.
210  */
211 int radeon_gem_info_ioctl(struct drm_device *dev, void *data,
212 			  struct drm_file *filp)
213 {
214 	struct radeon_device *rdev = dev->dev_private;
215 	struct drm_radeon_gem_info *args = data;
216 	struct ttm_mem_type_manager *man;
217 	unsigned i;
218 
219 	man = &rdev->mman.bdev.man[TTM_PL_VRAM];
220 
221 	args->vram_size = rdev->mc.real_vram_size;
222 	args->vram_visible = (u64)man->size << PAGE_SHIFT;
223 	if (rdev->stollen_vga_memory)
224 		args->vram_visible -= radeon_bo_size(rdev->stollen_vga_memory);
225 	args->vram_visible -= radeon_fbdev_total_size(rdev);
226 	args->gart_size = rdev->mc.gtt_size - 4096 - RADEON_IB_POOL_SIZE*64*1024;
227 	for(i = 0; i < RADEON_NUM_RINGS; ++i)
228 		args->gart_size -= rdev->ring[i].ring_size;
229 	return 0;
230 }
231 
232 int radeon_gem_pread_ioctl(struct drm_device *dev, void *data,
233 			   struct drm_file *filp)
234 {
235 	/* TODO: implement */
236 	DRM_ERROR("unimplemented %s\n", __func__);
237 	return -ENOSYS;
238 }
239 
240 int radeon_gem_pwrite_ioctl(struct drm_device *dev, void *data,
241 			    struct drm_file *filp)
242 {
243 	/* TODO: implement */
244 	DRM_ERROR("unimplemented %s\n", __func__);
245 	return -ENOSYS;
246 }
247 
248 int radeon_gem_create_ioctl(struct drm_device *dev, void *data,
249 			    struct drm_file *filp)
250 {
251 	struct radeon_device *rdev = dev->dev_private;
252 	struct drm_radeon_gem_create *args = data;
253 	struct drm_gem_object *gobj;
254 	uint32_t handle;
255 	int r;
256 
257 	lockmgr(&rdev->exclusive_lock, LK_SHARED);
258 	/* create a gem object to contain this object in */
259 	args->size = roundup(args->size, PAGE_SIZE);
260 	r = radeon_gem_object_create(rdev, args->size, args->alignment,
261 					args->initial_domain, false,
262 					false, &gobj);
263 	if (r) {
264 		if (r == -ERESTARTSYS)
265 			r = -EINTR;
266 		lockmgr(&rdev->exclusive_lock, LK_RELEASE);
267 		r = radeon_gem_handle_lockup(rdev, r);
268 		return r;
269 	}
270 	handle = 0;
271 	r = drm_gem_handle_create(filp, gobj, &handle);
272 	/* drop reference from allocate - handle holds it now */
273 	drm_gem_object_unreference_unlocked(gobj);
274 	if (r) {
275 		lockmgr(&rdev->exclusive_lock, LK_RELEASE);
276 		r = radeon_gem_handle_lockup(rdev, r);
277 		return r;
278 	}
279 	args->handle = handle;
280 	lockmgr(&rdev->exclusive_lock, LK_RELEASE);
281 	return 0;
282 }
283 
284 int radeon_gem_set_domain_ioctl(struct drm_device *dev, void *data,
285 				struct drm_file *filp)
286 {
287 	/* transition the BO to a domain -
288 	 * just validate the BO into a certain domain */
289 	struct radeon_device *rdev = dev->dev_private;
290 	struct drm_radeon_gem_set_domain *args = data;
291 	struct drm_gem_object *gobj;
292 	struct radeon_bo *robj;
293 	int r;
294 
295 	/* for now if someone requests domain CPU -
296 	 * just make sure the buffer is finished with */
297 	lockmgr(&rdev->exclusive_lock, LK_SHARED);
298 
299 	/* just do a BO wait for now */
300 	gobj = drm_gem_object_lookup(dev, filp, args->handle);
301 	if (gobj == NULL) {
302 		lockmgr(&rdev->exclusive_lock, LK_RELEASE);
303 		return -ENOENT;
304 	}
305 	robj = gem_to_radeon_bo(gobj);
306 
307 	r = radeon_gem_set_domain(gobj, args->read_domains, args->write_domain);
308 
309 	drm_gem_object_unreference_unlocked(gobj);
310 	lockmgr(&rdev->exclusive_lock, LK_RELEASE);
311 	r = radeon_gem_handle_lockup(robj->rdev, r);
312 	return r;
313 }
314 
315 int radeon_mode_dumb_mmap(struct drm_file *filp,
316 			  struct drm_device *dev,
317 			  uint32_t handle, uint64_t *offset_p)
318 {
319 	struct drm_gem_object *gobj;
320 	struct radeon_bo *robj;
321 
322 	gobj = drm_gem_object_lookup(dev, filp, handle);
323 	if (gobj == NULL) {
324 		return -ENOENT;
325 	}
326 	robj = gem_to_radeon_bo(gobj);
327 	*offset_p = radeon_bo_mmap_offset(robj);
328 	drm_gem_object_unreference_unlocked(gobj);
329 	return 0;
330 }
331 
332 int radeon_gem_mmap_ioctl(struct drm_device *dev, void *data,
333 			  struct drm_file *filp)
334 {
335 	struct drm_radeon_gem_mmap *args = data;
336 
337 	return radeon_mode_dumb_mmap(filp, dev, args->handle, &args->addr_ptr);
338 }
339 
340 int radeon_gem_busy_ioctl(struct drm_device *dev, void *data,
341 			  struct drm_file *filp)
342 {
343 	struct radeon_device *rdev = dev->dev_private;
344 	struct drm_radeon_gem_busy *args = data;
345 	struct drm_gem_object *gobj;
346 	struct radeon_bo *robj;
347 	int r;
348 	uint32_t cur_placement = 0;
349 
350 	gobj = drm_gem_object_lookup(dev, filp, args->handle);
351 	if (gobj == NULL) {
352 		return -ENOENT;
353 	}
354 	robj = gem_to_radeon_bo(gobj);
355 	r = radeon_bo_wait(robj, &cur_placement, true);
356 	switch (cur_placement) {
357 	case TTM_PL_VRAM:
358 		args->domain = RADEON_GEM_DOMAIN_VRAM;
359 		break;
360 	case TTM_PL_TT:
361 		args->domain = RADEON_GEM_DOMAIN_GTT;
362 		break;
363 	case TTM_PL_SYSTEM:
364 		args->domain = RADEON_GEM_DOMAIN_CPU;
365 	default:
366 		break;
367 	}
368 	drm_gem_object_unreference_unlocked(gobj);
369 	r = radeon_gem_handle_lockup(rdev, r);
370 	return r;
371 }
372 
373 int radeon_gem_wait_idle_ioctl(struct drm_device *dev, void *data,
374 			      struct drm_file *filp)
375 {
376 	struct radeon_device *rdev = dev->dev_private;
377 	struct drm_radeon_gem_wait_idle *args = data;
378 	struct drm_gem_object *gobj;
379 	struct radeon_bo *robj;
380 	int r;
381 
382 	gobj = drm_gem_object_lookup(dev, filp, args->handle);
383 	if (gobj == NULL) {
384 		return -ENOENT;
385 	}
386 	robj = gem_to_radeon_bo(gobj);
387 	r = radeon_bo_wait(robj, NULL, false);
388 	/* callback hw specific functions if any */
389 	if (rdev->asic->ioctl_wait_idle)
390 		robj->rdev->asic->ioctl_wait_idle(rdev, robj);
391 	drm_gem_object_unreference_unlocked(gobj);
392 	if (r == -ERESTARTSYS)
393 		r = -EINTR;
394 	r = radeon_gem_handle_lockup(rdev, r);
395 	return r;
396 }
397 
398 int radeon_gem_set_tiling_ioctl(struct drm_device *dev, void *data,
399 				struct drm_file *filp)
400 {
401 	struct drm_radeon_gem_set_tiling *args = data;
402 	struct drm_gem_object *gobj;
403 	struct radeon_bo *robj;
404 	int r = 0;
405 
406 	DRM_DEBUG("%d \n", args->handle);
407 	gobj = drm_gem_object_lookup(dev, filp, args->handle);
408 	if (gobj == NULL)
409 		return -ENOENT;
410 	robj = gem_to_radeon_bo(gobj);
411 	r = radeon_bo_set_tiling_flags(robj, args->tiling_flags, args->pitch);
412 	drm_gem_object_unreference_unlocked(gobj);
413 	return r;
414 }
415 
416 int radeon_gem_get_tiling_ioctl(struct drm_device *dev, void *data,
417 				struct drm_file *filp)
418 {
419 	struct drm_radeon_gem_get_tiling *args = data;
420 	struct drm_gem_object *gobj;
421 	struct radeon_bo *rbo;
422 	int r = 0;
423 
424 	DRM_DEBUG("\n");
425 	gobj = drm_gem_object_lookup(dev, filp, args->handle);
426 	if (gobj == NULL)
427 		return -ENOENT;
428 	rbo = gem_to_radeon_bo(gobj);
429 	r = radeon_bo_reserve(rbo, false);
430 	if (unlikely(r != 0))
431 		goto out;
432 	radeon_bo_get_tiling_flags(rbo, &args->tiling_flags, &args->pitch);
433 	radeon_bo_unreserve(rbo);
434 out:
435 	drm_gem_object_unreference_unlocked(gobj);
436 	return r;
437 }
438 
439 int radeon_gem_va_ioctl(struct drm_device *dev, void *data,
440 			  struct drm_file *filp)
441 {
442 	struct drm_radeon_gem_va *args = data;
443 	struct drm_gem_object *gobj;
444 	struct radeon_device *rdev = dev->dev_private;
445 	struct radeon_fpriv *fpriv = filp->driver_priv;
446 	struct radeon_bo *rbo;
447 	struct radeon_bo_va *bo_va;
448 	u32 invalid_flags;
449 	int r = 0;
450 
451 	if (!rdev->vm_manager.enabled) {
452 		args->operation = RADEON_VA_RESULT_ERROR;
453 		return -ENOTTY;
454 	}
455 
456 	/* !! DONT REMOVE !!
457 	 * We don't support vm_id yet, to be sure we don't have have broken
458 	 * userspace, reject anyone trying to use non 0 value thus moving
459 	 * forward we can use those fields without breaking existant userspace
460 	 */
461 	if (args->vm_id) {
462 		args->operation = RADEON_VA_RESULT_ERROR;
463 		return -EINVAL;
464 	}
465 
466 	if (args->offset < RADEON_VA_RESERVED_SIZE) {
467 		dev_err(dev->dev,
468 			"offset 0x%lX is in reserved area 0x%X\n",
469 			(unsigned long)args->offset,
470 			RADEON_VA_RESERVED_SIZE);
471 		args->operation = RADEON_VA_RESULT_ERROR;
472 		return -EINVAL;
473 	}
474 
475 	/* don't remove, we need to enforce userspace to set the snooped flag
476 	 * otherwise we will endup with broken userspace and we won't be able
477 	 * to enable this feature without adding new interface
478 	 */
479 	invalid_flags = RADEON_VM_PAGE_VALID | RADEON_VM_PAGE_SYSTEM;
480 	if ((args->flags & invalid_flags)) {
481 		dev_err(dev->dev, "invalid flags 0x%08X vs 0x%08X\n",
482 			args->flags, invalid_flags);
483 		args->operation = RADEON_VA_RESULT_ERROR;
484 		return -EINVAL;
485 	}
486 	if (!(args->flags & RADEON_VM_PAGE_SNOOPED)) {
487 		dev_err(dev->dev, "only supported snooped mapping for now\n");
488 		args->operation = RADEON_VA_RESULT_ERROR;
489 		return -EINVAL;
490 	}
491 
492 	switch (args->operation) {
493 	case RADEON_VA_MAP:
494 	case RADEON_VA_UNMAP:
495 		break;
496 	default:
497 		dev_err(dev->dev, "unsupported operation %d\n",
498 			args->operation);
499 		args->operation = RADEON_VA_RESULT_ERROR;
500 		return -EINVAL;
501 	}
502 
503 	gobj = drm_gem_object_lookup(dev, filp, args->handle);
504 	if (gobj == NULL) {
505 		args->operation = RADEON_VA_RESULT_ERROR;
506 		return -ENOENT;
507 	}
508 	rbo = gem_to_radeon_bo(gobj);
509 	r = radeon_bo_reserve(rbo, false);
510 	if (r) {
511 		args->operation = RADEON_VA_RESULT_ERROR;
512 		drm_gem_object_unreference_unlocked(gobj);
513 		return r;
514 	}
515 	bo_va = radeon_vm_bo_find(&fpriv->vm, rbo);
516 	if (!bo_va) {
517 		args->operation = RADEON_VA_RESULT_ERROR;
518 		drm_gem_object_unreference_unlocked(gobj);
519 		return -ENOENT;
520 	}
521 
522 	switch (args->operation) {
523 	case RADEON_VA_MAP:
524 		if (bo_va->soffset) {
525 			args->operation = RADEON_VA_RESULT_VA_EXIST;
526 			args->offset = bo_va->soffset;
527 			goto out;
528 		}
529 		r = radeon_vm_bo_set_addr(rdev, bo_va, args->offset, args->flags);
530 		break;
531 	case RADEON_VA_UNMAP:
532 		r = radeon_vm_bo_set_addr(rdev, bo_va, 0, 0);
533 		break;
534 	default:
535 		break;
536 	}
537 	args->operation = RADEON_VA_RESULT_OK;
538 	if (r) {
539 		args->operation = RADEON_VA_RESULT_ERROR;
540 	}
541 out:
542 	radeon_bo_unreserve(rbo);
543 	drm_gem_object_unreference_unlocked(gobj);
544 	return r;
545 }
546 
547 int radeon_mode_dumb_create(struct drm_file *file_priv,
548 			    struct drm_device *dev,
549 			    struct drm_mode_create_dumb *args)
550 {
551 	struct radeon_device *rdev = dev->dev_private;
552 	struct drm_gem_object *gobj;
553 	uint32_t handle;
554 	int r;
555 
556 	args->pitch = radeon_align_pitch(rdev, args->width, args->bpp, 0) * ((args->bpp + 1) / 8);
557 	args->size = args->pitch * args->height;
558 	args->size = ALIGN(args->size, PAGE_SIZE);
559 
560 	r = radeon_gem_object_create(rdev, args->size, 0,
561 				     RADEON_GEM_DOMAIN_VRAM,
562 				     false, ttm_bo_type_device,
563 				     &gobj);
564 	if (r)
565 		return -ENOMEM;
566 
567 	r = drm_gem_handle_create(file_priv, gobj, &handle);
568 	/* drop reference from allocate - handle holds it now */
569 	drm_gem_object_unreference_unlocked(gobj);
570 	if (r) {
571 		return r;
572 	}
573 	args->handle = handle;
574 	return 0;
575 }
576 
577 int radeon_mode_dumb_destroy(struct drm_file *file_priv,
578 			     struct drm_device *dev,
579 			     uint32_t handle)
580 {
581 	return drm_gem_handle_delete(file_priv, handle);
582 }
583 
584 #if defined(CONFIG_DEBUG_FS)
585 static int radeon_debugfs_gem_info(struct seq_file *m, void *data)
586 {
587 	struct drm_info_node *node = (struct drm_info_node *)m->private;
588 	struct drm_device *dev = node->minor->dev;
589 	struct radeon_device *rdev = dev->dev_private;
590 	struct radeon_bo *rbo;
591 	unsigned i = 0;
592 
593 	mutex_lock(&rdev->gem.mutex);
594 	list_for_each_entry(rbo, &rdev->gem.objects, list) {
595 		unsigned domain;
596 		const char *placement;
597 
598 		domain = radeon_mem_type_to_domain(rbo->tbo.mem.mem_type);
599 		switch (domain) {
600 		case RADEON_GEM_DOMAIN_VRAM:
601 			placement = "VRAM";
602 			break;
603 		case RADEON_GEM_DOMAIN_GTT:
604 			placement = " GTT";
605 			break;
606 		case RADEON_GEM_DOMAIN_CPU:
607 		default:
608 			placement = " CPU";
609 			break;
610 		}
611 		seq_printf(m, "bo[0x%08x] %8ldkB %8ldMB %s pid %8ld\n",
612 			   i, radeon_bo_size(rbo) >> 10, radeon_bo_size(rbo) >> 20,
613 			   placement, (unsigned long)rbo->pid);
614 		i++;
615 	}
616 	mutex_unlock(&rdev->gem.mutex);
617 	return 0;
618 }
619 
620 static struct drm_info_list radeon_debugfs_gem_list[] = {
621 	{"radeon_gem_info", &radeon_debugfs_gem_info, 0, NULL},
622 };
623 #endif
624 
625 int radeon_gem_debugfs_init(struct radeon_device *rdev)
626 {
627 #if defined(CONFIG_DEBUG_FS)
628 	return radeon_debugfs_add_files(rdev, radeon_debugfs_gem_list, 1);
629 #endif
630 	return 0;
631 }
632