1 /*
2  * Copyright (C) 2008 Maarten Maathuis.
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/drmP.h>
28 #include <drm/drm_crtc_helper.h>
29 
30 #include "nouveau_fbcon.h"
31 #include "dispnv04/hw.h"
32 #include "nouveau_crtc.h"
33 #include "nouveau_dma.h"
34 #include "nouveau_gem.h"
35 #include "nouveau_connector.h"
36 #include "nv50_display.h"
37 
38 #include "nouveau_fence.h"
39 
40 #include <engine/disp.h>
41 
42 #include <core/class.h>
43 
44 static int
45 nouveau_display_vblank_handler(void *data, int head)
46 {
47 	struct nouveau_drm *drm = data;
48 	drm_handle_vblank(drm->dev, head);
49 	return NVKM_EVENT_KEEP;
50 }
51 
52 int
53 nouveau_display_vblank_enable(struct drm_device *dev, int head)
54 {
55 	struct nouveau_display *disp = nouveau_display(dev);
56 	if (disp) {
57 		nouveau_event_get(disp->vblank[head]);
58 		return 0;
59 	}
60 	return -EIO;
61 }
62 
63 void
64 nouveau_display_vblank_disable(struct drm_device *dev, int head)
65 {
66 	struct nouveau_display *disp = nouveau_display(dev);
67 	if (disp)
68 		nouveau_event_put(disp->vblank[head]);
69 }
70 
71 static void
72 nouveau_display_vblank_fini(struct drm_device *dev)
73 {
74 	struct nouveau_display *disp = nouveau_display(dev);
75 	int i;
76 
77 	if (disp->vblank) {
78 		for (i = 0; i < dev->mode_config.num_crtc; i++)
79 			nouveau_event_ref(NULL, &disp->vblank[i]);
80 		kfree(disp->vblank);
81 		disp->vblank = NULL;
82 	}
83 
84 	drm_vblank_cleanup(dev);
85 }
86 
87 static int
88 nouveau_display_vblank_init(struct drm_device *dev)
89 {
90 	struct nouveau_display *disp = nouveau_display(dev);
91 	struct nouveau_drm *drm = nouveau_drm(dev);
92 	struct nouveau_disp *pdisp = nouveau_disp(drm->device);
93 	int ret, i;
94 
95 	disp->vblank = kzalloc(dev->mode_config.num_crtc *
96 			       sizeof(*disp->vblank), GFP_KERNEL);
97 	if (!disp->vblank)
98 		return -ENOMEM;
99 
100 	for (i = 0; i < dev->mode_config.num_crtc; i++) {
101 		ret = nouveau_event_new(pdisp->vblank, i,
102 					nouveau_display_vblank_handler,
103 					drm, &disp->vblank[i]);
104 		if (ret) {
105 			nouveau_display_vblank_fini(dev);
106 			return ret;
107 		}
108 	}
109 
110 	ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
111 	if (ret) {
112 		nouveau_display_vblank_fini(dev);
113 		return ret;
114 	}
115 
116 	return 0;
117 }
118 
119 static void
120 nouveau_user_framebuffer_destroy(struct drm_framebuffer *drm_fb)
121 {
122 	struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);
123 
124 	if (fb->nvbo)
125 		drm_gem_object_unreference_unlocked(&fb->nvbo->gem);
126 
127 	drm_framebuffer_cleanup(drm_fb);
128 	kfree(fb);
129 }
130 
131 static int
132 nouveau_user_framebuffer_create_handle(struct drm_framebuffer *drm_fb,
133 				       struct drm_file *file_priv,
134 				       unsigned int *handle)
135 {
136 	struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);
137 
138 	return drm_gem_handle_create(file_priv, &fb->nvbo->gem, handle);
139 }
140 
141 static const struct drm_framebuffer_funcs nouveau_framebuffer_funcs = {
142 	.destroy = nouveau_user_framebuffer_destroy,
143 	.create_handle = nouveau_user_framebuffer_create_handle,
144 };
145 
146 int
147 nouveau_framebuffer_init(struct drm_device *dev,
148 			 struct nouveau_framebuffer *nv_fb,
149 			 struct drm_mode_fb_cmd2 *mode_cmd,
150 			 struct nouveau_bo *nvbo)
151 {
152 	struct nouveau_drm *drm = nouveau_drm(dev);
153 	struct drm_framebuffer *fb = &nv_fb->base;
154 	int ret;
155 
156 	drm_helper_mode_fill_fb_struct(fb, mode_cmd);
157 	nv_fb->nvbo = nvbo;
158 
159 	if (nv_device(drm->device)->card_type >= NV_50) {
160 		u32 tile_flags = nouveau_bo_tile_layout(nvbo);
161 		if (tile_flags == 0x7a00 ||
162 		    tile_flags == 0xfe00)
163 			nv_fb->r_dma = NvEvoFB32;
164 		else
165 		if (tile_flags == 0x7000)
166 			nv_fb->r_dma = NvEvoFB16;
167 		else
168 			nv_fb->r_dma = NvEvoVRAM_LP;
169 
170 		switch (fb->depth) {
171 		case  8: nv_fb->r_format = 0x1e00; break;
172 		case 15: nv_fb->r_format = 0xe900; break;
173 		case 16: nv_fb->r_format = 0xe800; break;
174 		case 24:
175 		case 32: nv_fb->r_format = 0xcf00; break;
176 		case 30: nv_fb->r_format = 0xd100; break;
177 		default:
178 			 NV_ERROR(drm, "unknown depth %d\n", fb->depth);
179 			 return -EINVAL;
180 		}
181 
182 		if (nvbo->tile_flags & NOUVEAU_GEM_TILE_NONCONTIG) {
183 			NV_ERROR(drm, "framebuffer requires contiguous bo\n");
184 			return -EINVAL;
185 		}
186 
187 		if (nv_device(drm->device)->chipset == 0x50)
188 			nv_fb->r_format |= (tile_flags << 8);
189 
190 		if (!tile_flags) {
191 			if (nv_device(drm->device)->card_type < NV_D0)
192 				nv_fb->r_pitch = 0x00100000 | fb->pitches[0];
193 			else
194 				nv_fb->r_pitch = 0x01000000 | fb->pitches[0];
195 		} else {
196 			u32 mode = nvbo->tile_mode;
197 			if (nv_device(drm->device)->card_type >= NV_C0)
198 				mode >>= 4;
199 			nv_fb->r_pitch = ((fb->pitches[0] / 4) << 4) | mode;
200 		}
201 	}
202 
203 	ret = drm_framebuffer_init(dev, fb, &nouveau_framebuffer_funcs);
204 	if (ret) {
205 		return ret;
206 	}
207 
208 	return 0;
209 }
210 
211 static struct drm_framebuffer *
212 nouveau_user_framebuffer_create(struct drm_device *dev,
213 				struct drm_file *file_priv,
214 				struct drm_mode_fb_cmd2 *mode_cmd)
215 {
216 	struct nouveau_framebuffer *nouveau_fb;
217 	struct drm_gem_object *gem;
218 	int ret = -ENOMEM;
219 
220 	gem = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
221 	if (!gem)
222 		return ERR_PTR(-ENOENT);
223 
224 	nouveau_fb = kzalloc(sizeof(struct nouveau_framebuffer), GFP_KERNEL);
225 	if (!nouveau_fb)
226 		goto err_unref;
227 
228 	ret = nouveau_framebuffer_init(dev, nouveau_fb, mode_cmd, nouveau_gem_object(gem));
229 	if (ret)
230 		goto err;
231 
232 	return &nouveau_fb->base;
233 
234 err:
235 	kfree(nouveau_fb);
236 err_unref:
237 	drm_gem_object_unreference(gem);
238 	return ERR_PTR(ret);
239 }
240 
241 static const struct drm_mode_config_funcs nouveau_mode_config_funcs = {
242 	.fb_create = nouveau_user_framebuffer_create,
243 	.output_poll_changed = nouveau_fbcon_output_poll_changed,
244 };
245 
246 
247 struct nouveau_drm_prop_enum_list {
248 	u8 gen_mask;
249 	int type;
250 	char *name;
251 };
252 
253 static struct nouveau_drm_prop_enum_list underscan[] = {
254 	{ 6, UNDERSCAN_AUTO, "auto" },
255 	{ 6, UNDERSCAN_OFF, "off" },
256 	{ 6, UNDERSCAN_ON, "on" },
257 	{}
258 };
259 
260 static struct nouveau_drm_prop_enum_list dither_mode[] = {
261 	{ 7, DITHERING_MODE_AUTO, "auto" },
262 	{ 7, DITHERING_MODE_OFF, "off" },
263 	{ 1, DITHERING_MODE_ON, "on" },
264 	{ 6, DITHERING_MODE_STATIC2X2, "static 2x2" },
265 	{ 6, DITHERING_MODE_DYNAMIC2X2, "dynamic 2x2" },
266 	{ 4, DITHERING_MODE_TEMPORAL, "temporal" },
267 	{}
268 };
269 
270 static struct nouveau_drm_prop_enum_list dither_depth[] = {
271 	{ 6, DITHERING_DEPTH_AUTO, "auto" },
272 	{ 6, DITHERING_DEPTH_6BPC, "6 bpc" },
273 	{ 6, DITHERING_DEPTH_8BPC, "8 bpc" },
274 	{}
275 };
276 
277 #define PROP_ENUM(p,gen,n,list) do {                                           \
278 	struct nouveau_drm_prop_enum_list *l = (list);                         \
279 	int c = 0;                                                             \
280 	while (l->gen_mask) {                                                  \
281 		if (l->gen_mask & (1 << (gen)))                                \
282 			c++;                                                   \
283 		l++;                                                           \
284 	}                                                                      \
285 	if (c) {                                                               \
286 		p = drm_property_create(dev, DRM_MODE_PROP_ENUM, n, c);        \
287 		l = (list);                                                    \
288 		c = 0;                                                         \
289 		while (p && l->gen_mask) {                                     \
290 			if (l->gen_mask & (1 << (gen))) {                      \
291 				drm_property_add_enum(p, c, l->type, l->name); \
292 				c++;                                           \
293 			}                                                      \
294 			l++;                                                   \
295 		}                                                              \
296 	}                                                                      \
297 } while(0)
298 
299 int
300 nouveau_display_init(struct drm_device *dev)
301 {
302 	struct nouveau_display *disp = nouveau_display(dev);
303 	struct drm_connector *connector;
304 	int ret;
305 
306 	ret = disp->init(dev);
307 	if (ret)
308 		return ret;
309 
310 	/* enable polling for external displays */
311 	drm_kms_helper_poll_enable(dev);
312 
313 	/* enable hotplug interrupts */
314 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
315 		struct nouveau_connector *conn = nouveau_connector(connector);
316 		if (conn->hpd_func) nouveau_event_get(conn->hpd_func);
317 	}
318 
319 	return ret;
320 }
321 
322 void
323 nouveau_display_fini(struct drm_device *dev)
324 {
325 	struct nouveau_display *disp = nouveau_display(dev);
326 	struct drm_connector *connector;
327 
328 	/* disable hotplug interrupts */
329 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
330 		struct nouveau_connector *conn = nouveau_connector(connector);
331 		if (conn->hpd_func) nouveau_event_put(conn->hpd_func);
332 	}
333 
334 	drm_kms_helper_poll_disable(dev);
335 	disp->fini(dev);
336 }
337 
338 int
339 nouveau_display_create(struct drm_device *dev)
340 {
341 	struct nouveau_drm *drm = nouveau_drm(dev);
342 	struct nouveau_display *disp;
343 	int ret, gen;
344 
345 	disp = drm->display = kzalloc(sizeof(*disp), GFP_KERNEL);
346 	if (!disp)
347 		return -ENOMEM;
348 
349 	drm_mode_config_init(dev);
350 	drm_mode_create_scaling_mode_property(dev);
351 	drm_mode_create_dvi_i_properties(dev);
352 
353 	if (nv_device(drm->device)->card_type < NV_50)
354 		gen = 0;
355 	else
356 	if (nv_device(drm->device)->card_type < NV_D0)
357 		gen = 1;
358 	else
359 		gen = 2;
360 
361 	PROP_ENUM(disp->dithering_mode, gen, "dithering mode", dither_mode);
362 	PROP_ENUM(disp->dithering_depth, gen, "dithering depth", dither_depth);
363 	PROP_ENUM(disp->underscan_property, gen, "underscan", underscan);
364 
365 	disp->underscan_hborder_property =
366 		drm_property_create_range(dev, 0, "underscan hborder", 0, 128);
367 
368 	disp->underscan_vborder_property =
369 		drm_property_create_range(dev, 0, "underscan vborder", 0, 128);
370 
371 	if (gen >= 1) {
372 		/* -90..+90 */
373 		disp->vibrant_hue_property =
374 			drm_property_create_range(dev, 0, "vibrant hue", 0, 180);
375 
376 		/* -100..+100 */
377 		disp->color_vibrance_property =
378 			drm_property_create_range(dev, 0, "color vibrance", 0, 200);
379 	}
380 
381 	dev->mode_config.funcs = &nouveau_mode_config_funcs;
382 	dev->mode_config.fb_base = pci_resource_start(dev->pdev, 1);
383 
384 	dev->mode_config.min_width = 0;
385 	dev->mode_config.min_height = 0;
386 	if (nv_device(drm->device)->card_type < NV_10) {
387 		dev->mode_config.max_width = 2048;
388 		dev->mode_config.max_height = 2048;
389 	} else
390 	if (nv_device(drm->device)->card_type < NV_50) {
391 		dev->mode_config.max_width = 4096;
392 		dev->mode_config.max_height = 4096;
393 	} else {
394 		dev->mode_config.max_width = 8192;
395 		dev->mode_config.max_height = 8192;
396 	}
397 
398 	dev->mode_config.preferred_depth = 24;
399 	dev->mode_config.prefer_shadow = 1;
400 
401 	if (nv_device(drm->device)->chipset < 0x11)
402 		dev->mode_config.async_page_flip = false;
403 	else
404 		dev->mode_config.async_page_flip = true;
405 
406 	drm_kms_helper_poll_init(dev);
407 	drm_kms_helper_poll_disable(dev);
408 
409 	if (drm->vbios.dcb.entries) {
410 		if (nv_device(drm->device)->card_type < NV_50)
411 			ret = nv04_display_create(dev);
412 		else
413 			ret = nv50_display_create(dev);
414 	} else {
415 		ret = 0;
416 	}
417 
418 	if (ret)
419 		goto disp_create_err;
420 
421 	if (dev->mode_config.num_crtc) {
422 		ret = nouveau_display_vblank_init(dev);
423 		if (ret)
424 			goto vblank_err;
425 	}
426 
427 	nouveau_backlight_init(dev);
428 	return 0;
429 
430 vblank_err:
431 	disp->dtor(dev);
432 disp_create_err:
433 	drm_kms_helper_poll_fini(dev);
434 	drm_mode_config_cleanup(dev);
435 	return ret;
436 }
437 
438 void
439 nouveau_display_destroy(struct drm_device *dev)
440 {
441 	struct nouveau_display *disp = nouveau_display(dev);
442 
443 	nouveau_backlight_exit(dev);
444 	nouveau_display_vblank_fini(dev);
445 
446 	drm_kms_helper_poll_fini(dev);
447 	drm_mode_config_cleanup(dev);
448 
449 	if (disp->dtor)
450 		disp->dtor(dev);
451 
452 	nouveau_drm(dev)->display = NULL;
453 	kfree(disp);
454 }
455 
456 int
457 nouveau_display_suspend(struct drm_device *dev)
458 {
459 	struct nouveau_drm *drm = nouveau_drm(dev);
460 	struct drm_crtc *crtc;
461 
462 	nouveau_display_fini(dev);
463 
464 	NV_INFO(drm, "unpinning framebuffer(s)...\n");
465 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
466 		struct nouveau_framebuffer *nouveau_fb;
467 
468 		nouveau_fb = nouveau_framebuffer(crtc->fb);
469 		if (!nouveau_fb || !nouveau_fb->nvbo)
470 			continue;
471 
472 		nouveau_bo_unpin(nouveau_fb->nvbo);
473 	}
474 
475 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
476 		struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
477 
478 		nouveau_bo_unmap(nv_crtc->cursor.nvbo);
479 		nouveau_bo_unpin(nv_crtc->cursor.nvbo);
480 	}
481 
482 	return 0;
483 }
484 
485 void
486 nouveau_display_repin(struct drm_device *dev)
487 {
488 	struct nouveau_drm *drm = nouveau_drm(dev);
489 	struct drm_crtc *crtc;
490 	int ret;
491 
492 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
493 		struct nouveau_framebuffer *nouveau_fb;
494 
495 		nouveau_fb = nouveau_framebuffer(crtc->fb);
496 		if (!nouveau_fb || !nouveau_fb->nvbo)
497 			continue;
498 
499 		nouveau_bo_pin(nouveau_fb->nvbo, TTM_PL_FLAG_VRAM);
500 	}
501 
502 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
503 		struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
504 
505 		ret = nouveau_bo_pin(nv_crtc->cursor.nvbo, TTM_PL_FLAG_VRAM);
506 		if (!ret)
507 			ret = nouveau_bo_map(nv_crtc->cursor.nvbo);
508 		if (ret)
509 			NV_ERROR(drm, "Could not pin/map cursor.\n");
510 	}
511 }
512 
513 void
514 nouveau_display_resume(struct drm_device *dev)
515 {
516 	struct drm_crtc *crtc;
517 	nouveau_display_init(dev);
518 
519 	/* Force CLUT to get re-loaded during modeset */
520 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
521 		struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
522 
523 		nv_crtc->lut.depth = 0;
524 	}
525 
526 	drm_helper_resume_force_mode(dev);
527 
528 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
529 		struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
530 		u32 offset = nv_crtc->cursor.nvbo->bo.offset;
531 
532 		nv_crtc->cursor.set_offset(nv_crtc, offset);
533 		nv_crtc->cursor.set_pos(nv_crtc, nv_crtc->cursor_saved_x,
534 						 nv_crtc->cursor_saved_y);
535 	}
536 }
537 
538 static int
539 nouveau_page_flip_emit(struct nouveau_channel *chan,
540 		       struct nouveau_bo *old_bo,
541 		       struct nouveau_bo *new_bo,
542 		       struct nouveau_page_flip_state *s,
543 		       struct nouveau_fence **pfence)
544 {
545 	struct nouveau_fence_chan *fctx = chan->fence;
546 	struct nouveau_drm *drm = chan->drm;
547 	struct drm_device *dev = drm->dev;
548 	unsigned long flags;
549 	int ret;
550 
551 	/* Queue it to the pending list */
552 	spin_lock_irqsave(&dev->event_lock, flags);
553 	list_add_tail(&s->head, &fctx->flip);
554 	spin_unlock_irqrestore(&dev->event_lock, flags);
555 
556 	/* Synchronize with the old framebuffer */
557 	ret = nouveau_fence_sync(old_bo->bo.sync_obj, chan);
558 	if (ret)
559 		goto fail;
560 
561 	/* Emit the pageflip */
562 	ret = RING_SPACE(chan, 2);
563 	if (ret)
564 		goto fail;
565 
566 	if (nv_device(drm->device)->card_type < NV_C0)
567 		BEGIN_NV04(chan, NvSubSw, NV_SW_PAGE_FLIP, 1);
568 	else
569 		BEGIN_NVC0(chan, FermiSw, NV_SW_PAGE_FLIP, 1);
570 	OUT_RING  (chan, 0x00000000);
571 	FIRE_RING (chan);
572 
573 	ret = nouveau_fence_new(chan, false, pfence);
574 	if (ret)
575 		goto fail;
576 
577 	return 0;
578 fail:
579 	spin_lock_irqsave(&dev->event_lock, flags);
580 	list_del(&s->head);
581 	spin_unlock_irqrestore(&dev->event_lock, flags);
582 	return ret;
583 }
584 
585 int
586 nouveau_crtc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb,
587 		       struct drm_pending_vblank_event *event, u32 flags)
588 {
589 	const int swap_interval = (flags & DRM_MODE_PAGE_FLIP_ASYNC) ? 0 : 1;
590 	struct drm_device *dev = crtc->dev;
591 	struct nouveau_drm *drm = nouveau_drm(dev);
592 	struct nouveau_bo *old_bo = nouveau_framebuffer(crtc->fb)->nvbo;
593 	struct nouveau_bo *new_bo = nouveau_framebuffer(fb)->nvbo;
594 	struct nouveau_page_flip_state *s;
595 	struct nouveau_channel *chan = drm->channel;
596 	struct nouveau_fence *fence;
597 	int ret;
598 
599 	if (!drm->channel)
600 		return -ENODEV;
601 
602 	s = kzalloc(sizeof(*s), GFP_KERNEL);
603 	if (!s)
604 		return -ENOMEM;
605 
606 	/* synchronise rendering channel with the kernel's channel */
607 	spin_lock(&new_bo->bo.bdev->fence_lock);
608 	fence = nouveau_fence_ref(new_bo->bo.sync_obj);
609 	spin_unlock(&new_bo->bo.bdev->fence_lock);
610 	ret = nouveau_fence_sync(fence, chan);
611 	nouveau_fence_unref(&fence);
612 	if (ret)
613 		return ret;
614 
615 	if (new_bo != old_bo) {
616 		ret = nouveau_bo_pin(new_bo, TTM_PL_FLAG_VRAM);
617 		if (ret)
618 			goto fail_free;
619 	}
620 
621 	mutex_lock(&chan->cli->mutex);
622 	ret = ttm_bo_reserve(&old_bo->bo, true, false, false, NULL);
623 	if (ret)
624 		goto fail_unpin;
625 
626 	/* Initialize a page flip struct */
627 	*s = (struct nouveau_page_flip_state)
628 		{ { }, event, nouveau_crtc(crtc)->index,
629 		  fb->bits_per_pixel, fb->pitches[0], crtc->x, crtc->y,
630 		  new_bo->bo.offset };
631 
632 	/* Emit a page flip */
633 	if (nv_device(drm->device)->card_type >= NV_50) {
634 		ret = nv50_display_flip_next(crtc, fb, chan, swap_interval);
635 		if (ret)
636 			goto fail_unreserve;
637 	} else {
638 		struct nv04_display *dispnv04 = nv04_display(dev);
639 		int head = nouveau_crtc(crtc)->index;
640 
641 		if (swap_interval) {
642 			ret = RING_SPACE(chan, 8);
643 			if (ret)
644 				goto fail_unreserve;
645 
646 			BEGIN_NV04(chan, NvSubImageBlit, 0x012c, 1);
647 			OUT_RING  (chan, 0);
648 			BEGIN_NV04(chan, NvSubImageBlit, 0x0134, 1);
649 			OUT_RING  (chan, head);
650 			BEGIN_NV04(chan, NvSubImageBlit, 0x0100, 1);
651 			OUT_RING  (chan, 0);
652 			BEGIN_NV04(chan, NvSubImageBlit, 0x0130, 1);
653 			OUT_RING  (chan, 0);
654 		}
655 
656 		nouveau_bo_ref(new_bo, &dispnv04->image[head]);
657 	}
658 
659 	ret = nouveau_page_flip_emit(chan, old_bo, new_bo, s, &fence);
660 	mutex_unlock(&chan->cli->mutex);
661 	if (ret)
662 		goto fail_unreserve;
663 
664 	/* Update the crtc struct and cleanup */
665 	crtc->fb = fb;
666 
667 	nouveau_bo_fence(old_bo, fence);
668 	ttm_bo_unreserve(&old_bo->bo);
669 	if (old_bo != new_bo)
670 		nouveau_bo_unpin(old_bo);
671 	nouveau_fence_unref(&fence);
672 	return 0;
673 
674 fail_unreserve:
675 	ttm_bo_unreserve(&old_bo->bo);
676 fail_unpin:
677 	mutex_unlock(&chan->cli->mutex);
678 	if (old_bo != new_bo)
679 		nouveau_bo_unpin(new_bo);
680 fail_free:
681 	kfree(s);
682 	return ret;
683 }
684 
685 int
686 nouveau_finish_page_flip(struct nouveau_channel *chan,
687 			 struct nouveau_page_flip_state *ps)
688 {
689 	struct nouveau_fence_chan *fctx = chan->fence;
690 	struct nouveau_drm *drm = chan->drm;
691 	struct drm_device *dev = drm->dev;
692 	struct nouveau_page_flip_state *s;
693 	unsigned long flags;
694 
695 	spin_lock_irqsave(&dev->event_lock, flags);
696 
697 	if (list_empty(&fctx->flip)) {
698 		NV_ERROR(drm, "unexpected pageflip\n");
699 		spin_unlock_irqrestore(&dev->event_lock, flags);
700 		return -EINVAL;
701 	}
702 
703 	s = list_first_entry(&fctx->flip, struct nouveau_page_flip_state, head);
704 	if (s->event)
705 		drm_send_vblank_event(dev, s->crtc, s->event);
706 
707 	list_del(&s->head);
708 	if (ps)
709 		*ps = *s;
710 	kfree(s);
711 
712 	spin_unlock_irqrestore(&dev->event_lock, flags);
713 	return 0;
714 }
715 
716 int
717 nouveau_flip_complete(void *data)
718 {
719 	struct nouveau_channel *chan = data;
720 	struct nouveau_drm *drm = chan->drm;
721 	struct nouveau_page_flip_state state;
722 
723 	if (!nouveau_finish_page_flip(chan, &state)) {
724 		if (nv_device(drm->device)->card_type < NV_50) {
725 			nv_set_crtc_base(drm->dev, state.crtc, state.offset +
726 					 state.y * state.pitch +
727 					 state.x * state.bpp / 8);
728 		}
729 	}
730 
731 	return 0;
732 }
733 
734 int
735 nouveau_display_dumb_create(struct drm_file *file_priv, struct drm_device *dev,
736 			    struct drm_mode_create_dumb *args)
737 {
738 	struct nouveau_bo *bo;
739 	int ret;
740 
741 	args->pitch = roundup(args->width * (args->bpp / 8), 256);
742 	args->size = args->pitch * args->height;
743 	args->size = roundup(args->size, PAGE_SIZE);
744 
745 	ret = nouveau_gem_new(dev, args->size, 0, NOUVEAU_GEM_DOMAIN_VRAM, 0, 0, &bo);
746 	if (ret)
747 		return ret;
748 
749 	ret = drm_gem_handle_create(file_priv, &bo->gem, &args->handle);
750 	drm_gem_object_unreference_unlocked(&bo->gem);
751 	return ret;
752 }
753 
754 int
755 nouveau_display_dumb_map_offset(struct drm_file *file_priv,
756 				struct drm_device *dev,
757 				uint32_t handle, uint64_t *poffset)
758 {
759 	struct drm_gem_object *gem;
760 
761 	gem = drm_gem_object_lookup(dev, file_priv, handle);
762 	if (gem) {
763 		struct nouveau_bo *bo = nouveau_gem_object(gem);
764 		*poffset = drm_vma_node_offset_addr(&bo->bo.vma_node);
765 		drm_gem_object_unreference_unlocked(gem);
766 		return 0;
767 	}
768 
769 	return -ENOENT;
770 }
771