1 /**************************************************************************
2  *
3  * Copyright © 2009-2015 VMware, Inc., Palo Alto, CA., USA
4  * All Rights Reserved.
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the
8  * "Software"), to deal in the Software without restriction, including
9  * without limitation the rights to use, copy, modify, merge, publish,
10  * distribute, sub license, and/or sell copies of the Software, and to
11  * permit persons to whom the Software is furnished to do so, subject to
12  * the following conditions:
13  *
14  * The above copyright notice and this permission notice (including the
15  * next paragraph) shall be included in all copies or substantial portions
16  * of the Software.
17  *
18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
25  *
26  **************************************************************************/
27 
28 #include "vmwgfx_kms.h"
29 #include <drm/drm_plane_helper.h>
30 #include <drm/drm_atomic.h>
31 #include <drm/drm_atomic_helper.h>
32 
33 
34 #define vmw_crtc_to_ldu(x) \
35 	container_of(x, struct vmw_legacy_display_unit, base.crtc)
36 #define vmw_encoder_to_ldu(x) \
37 	container_of(x, struct vmw_legacy_display_unit, base.encoder)
38 #define vmw_connector_to_ldu(x) \
39 	container_of(x, struct vmw_legacy_display_unit, base.connector)
40 
41 struct vmw_legacy_display {
42 	struct list_head active;
43 
44 	unsigned num_active;
45 	unsigned last_num_active;
46 
47 	struct vmw_framebuffer *fb;
48 };
49 
50 /**
51  * Display unit using the legacy register interface.
52  */
53 struct vmw_legacy_display_unit {
54 	struct vmw_display_unit base;
55 
56 	struct list_head active;
57 };
58 
59 static void vmw_ldu_destroy(struct vmw_legacy_display_unit *ldu)
60 {
61 	list_del_init(&ldu->active);
62 	vmw_du_cleanup(&ldu->base);
63 	kfree(ldu);
64 }
65 
66 
67 /*
68  * Legacy Display Unit CRTC functions
69  */
70 
71 static void vmw_ldu_crtc_destroy(struct drm_crtc *crtc)
72 {
73 	vmw_ldu_destroy(vmw_crtc_to_ldu(crtc));
74 }
75 
76 static int vmw_ldu_commit_list(struct vmw_private *dev_priv)
77 {
78 	struct vmw_legacy_display *lds = dev_priv->ldu_priv;
79 	struct vmw_legacy_display_unit *entry;
80 	struct drm_framebuffer *fb = NULL;
81 	struct drm_crtc *crtc = NULL;
82 	int i = 0;
83 
84 	/* If there is no display topology the host just assumes
85 	 * that the guest will set the same layout as the host.
86 	 */
87 	if (!(dev_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY)) {
88 		int w = 0, h = 0;
89 		list_for_each_entry(entry, &lds->active, active) {
90 			crtc = &entry->base.crtc;
91 			w = max(w, crtc->x + crtc->mode.hdisplay);
92 			h = max(h, crtc->y + crtc->mode.vdisplay);
93 			i++;
94 		}
95 
96 		if (crtc == NULL)
97 			return 0;
98 		fb = entry->base.crtc.primary->state->fb;
99 
100 		return vmw_kms_write_svga(dev_priv, w, h, fb->pitches[0],
101 					  fb->format->cpp[0] * 8,
102 					  fb->format->depth);
103 	}
104 
105 	if (!list_empty(&lds->active)) {
106 		entry = list_entry(lds->active.next, typeof(*entry), active);
107 		fb = entry->base.crtc.primary->state->fb;
108 
109 		vmw_kms_write_svga(dev_priv, fb->width, fb->height, fb->pitches[0],
110 				   fb->format->cpp[0] * 8, fb->format->depth);
111 	}
112 
113 	/* Make sure we always show something. */
114 	vmw_write(dev_priv, SVGA_REG_NUM_GUEST_DISPLAYS,
115 		  lds->num_active ? lds->num_active : 1);
116 
117 	i = 0;
118 	list_for_each_entry(entry, &lds->active, active) {
119 		crtc = &entry->base.crtc;
120 
121 		vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, i);
122 		vmw_write(dev_priv, SVGA_REG_DISPLAY_IS_PRIMARY, !i);
123 		vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_X, crtc->x);
124 		vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_Y, crtc->y);
125 		vmw_write(dev_priv, SVGA_REG_DISPLAY_WIDTH, crtc->mode.hdisplay);
126 		vmw_write(dev_priv, SVGA_REG_DISPLAY_HEIGHT, crtc->mode.vdisplay);
127 		vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
128 
129 		i++;
130 	}
131 
132 	BUG_ON(i != lds->num_active);
133 
134 	lds->last_num_active = lds->num_active;
135 
136 	return 0;
137 }
138 
139 static int vmw_ldu_del_active(struct vmw_private *vmw_priv,
140 			      struct vmw_legacy_display_unit *ldu)
141 {
142 	struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
143 	if (list_empty(&ldu->active))
144 		return 0;
145 
146 	/* Must init otherwise list_empty(&ldu->active) will not work. */
147 	list_del_init(&ldu->active);
148 	if (--(ld->num_active) == 0) {
149 		BUG_ON(!ld->fb);
150 		if (ld->fb->unpin)
151 			ld->fb->unpin(ld->fb);
152 		ld->fb = NULL;
153 	}
154 
155 	return 0;
156 }
157 
158 static int vmw_ldu_add_active(struct vmw_private *vmw_priv,
159 			      struct vmw_legacy_display_unit *ldu,
160 			      struct vmw_framebuffer *vfb)
161 {
162 	struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
163 	struct vmw_legacy_display_unit *entry;
164 	struct list_head *at;
165 
166 	BUG_ON(!ld->num_active && ld->fb);
167 	if (vfb != ld->fb) {
168 		if (ld->fb && ld->fb->unpin)
169 			ld->fb->unpin(ld->fb);
170 		vmw_svga_enable(vmw_priv);
171 		if (vfb->pin)
172 			vfb->pin(vfb);
173 		ld->fb = vfb;
174 	}
175 
176 	if (!list_empty(&ldu->active))
177 		return 0;
178 
179 	at = &ld->active;
180 	list_for_each_entry(entry, &ld->active, active) {
181 		if (entry->base.unit > ldu->base.unit)
182 			break;
183 
184 		at = &entry->active;
185 	}
186 
187 	list_add(&ldu->active, at);
188 
189 	ld->num_active++;
190 
191 	return 0;
192 }
193 
194 /**
195  * vmw_ldu_crtc_mode_set_nofb - Enable svga
196  *
197  * @crtc: CRTC associated with the new screen
198  *
199  * For LDU, just enable the svga
200  */
201 static void vmw_ldu_crtc_mode_set_nofb(struct drm_crtc *crtc)
202 {
203 }
204 
205 /**
206  * vmw_ldu_crtc_atomic_enable - Noop
207  *
208  * @crtc: CRTC associated with the new screen
209  *
210  * This is called after a mode set has been completed.  Here's
211  * usually a good place to call vmw_ldu_add_active/vmw_ldu_del_active
212  * but since for LDU the display plane is closely tied to the
213  * CRTC, it makes more sense to do those at plane update time.
214  */
215 static void vmw_ldu_crtc_atomic_enable(struct drm_crtc *crtc,
216 				       struct drm_crtc_state *old_state)
217 {
218 }
219 
220 /**
221  * vmw_ldu_crtc_atomic_disable - Turns off CRTC
222  *
223  * @crtc: CRTC to be turned off
224  */
225 static void vmw_ldu_crtc_atomic_disable(struct drm_crtc *crtc,
226 					struct drm_crtc_state *old_state)
227 {
228 }
229 
230 static const struct drm_crtc_funcs vmw_legacy_crtc_funcs = {
231 	.gamma_set = vmw_du_crtc_gamma_set,
232 	.destroy = vmw_ldu_crtc_destroy,
233 	.reset = vmw_du_crtc_reset,
234 	.atomic_duplicate_state = vmw_du_crtc_duplicate_state,
235 	.atomic_destroy_state = vmw_du_crtc_destroy_state,
236 	.set_config = vmw_kms_set_config,
237 };
238 
239 
240 /*
241  * Legacy Display Unit encoder functions
242  */
243 
244 static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder)
245 {
246 	vmw_ldu_destroy(vmw_encoder_to_ldu(encoder));
247 }
248 
249 static const struct drm_encoder_funcs vmw_legacy_encoder_funcs = {
250 	.destroy = vmw_ldu_encoder_destroy,
251 };
252 
253 /*
254  * Legacy Display Unit connector functions
255  */
256 
257 static void vmw_ldu_connector_destroy(struct drm_connector *connector)
258 {
259 	vmw_ldu_destroy(vmw_connector_to_ldu(connector));
260 }
261 
262 static const struct drm_connector_funcs vmw_legacy_connector_funcs = {
263 	.dpms = vmw_du_connector_dpms,
264 	.detect = vmw_du_connector_detect,
265 	.fill_modes = vmw_du_connector_fill_modes,
266 	.set_property = vmw_du_connector_set_property,
267 	.destroy = vmw_ldu_connector_destroy,
268 	.reset = vmw_du_connector_reset,
269 	.atomic_duplicate_state = vmw_du_connector_duplicate_state,
270 	.atomic_destroy_state = vmw_du_connector_destroy_state,
271 	.atomic_set_property = vmw_du_connector_atomic_set_property,
272 	.atomic_get_property = vmw_du_connector_atomic_get_property,
273 };
274 
275 static const struct
276 drm_connector_helper_funcs vmw_ldu_connector_helper_funcs = {
277 	.best_encoder = drm_atomic_helper_best_encoder,
278 };
279 
280 /*
281  * Legacy Display Plane Functions
282  */
283 
284 static void
285 vmw_ldu_primary_plane_atomic_update(struct drm_plane *plane,
286 				    struct drm_plane_state *old_state)
287 {
288 	struct vmw_private *dev_priv;
289 	struct vmw_legacy_display_unit *ldu;
290 	struct vmw_framebuffer *vfb;
291 	struct drm_framebuffer *fb;
292 	struct drm_crtc *crtc = plane->state->crtc ?: old_state->crtc;
293 
294 
295 	ldu = vmw_crtc_to_ldu(crtc);
296 	dev_priv = vmw_priv(plane->dev);
297 	fb       = plane->state->fb;
298 
299 	vfb = (fb) ? vmw_framebuffer_to_vfb(fb) : NULL;
300 
301 	if (vfb)
302 		vmw_ldu_add_active(dev_priv, ldu, vfb);
303 	else
304 		vmw_ldu_del_active(dev_priv, ldu);
305 
306 	vmw_ldu_commit_list(dev_priv);
307 }
308 
309 
310 static const struct drm_plane_funcs vmw_ldu_plane_funcs = {
311 	.update_plane = drm_atomic_helper_update_plane,
312 	.disable_plane = drm_atomic_helper_disable_plane,
313 	.destroy = vmw_du_primary_plane_destroy,
314 	.reset = vmw_du_plane_reset,
315 	.atomic_duplicate_state = vmw_du_plane_duplicate_state,
316 	.atomic_destroy_state = vmw_du_plane_destroy_state,
317 };
318 
319 static const struct drm_plane_funcs vmw_ldu_cursor_funcs = {
320 	.update_plane = drm_atomic_helper_update_plane,
321 	.disable_plane = drm_atomic_helper_disable_plane,
322 	.destroy = vmw_du_cursor_plane_destroy,
323 	.reset = vmw_du_plane_reset,
324 	.atomic_duplicate_state = vmw_du_plane_duplicate_state,
325 	.atomic_destroy_state = vmw_du_plane_destroy_state,
326 };
327 
328 /*
329  * Atomic Helpers
330  */
331 static const struct
332 drm_plane_helper_funcs vmw_ldu_cursor_plane_helper_funcs = {
333 	.atomic_check = vmw_du_cursor_plane_atomic_check,
334 	.atomic_update = vmw_du_cursor_plane_atomic_update,
335 	.prepare_fb = vmw_du_cursor_plane_prepare_fb,
336 	.cleanup_fb = vmw_du_plane_cleanup_fb,
337 };
338 
339 static const struct
340 drm_plane_helper_funcs vmw_ldu_primary_plane_helper_funcs = {
341 	.atomic_check = vmw_du_primary_plane_atomic_check,
342 	.atomic_update = vmw_ldu_primary_plane_atomic_update,
343 };
344 
345 static const struct drm_crtc_helper_funcs vmw_ldu_crtc_helper_funcs = {
346 	.mode_set_nofb = vmw_ldu_crtc_mode_set_nofb,
347 	.atomic_check = vmw_du_crtc_atomic_check,
348 	.atomic_begin = vmw_du_crtc_atomic_begin,
349 	.atomic_flush = vmw_du_crtc_atomic_flush,
350 	.atomic_enable = vmw_ldu_crtc_atomic_enable,
351 	.atomic_disable = vmw_ldu_crtc_atomic_disable,
352 };
353 
354 
355 static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
356 {
357 	struct vmw_legacy_display_unit *ldu;
358 	struct drm_device *dev = dev_priv->dev;
359 	struct drm_connector *connector;
360 	struct drm_encoder *encoder;
361 	struct drm_plane *primary, *cursor;
362 	struct drm_crtc *crtc;
363 	int ret;
364 
365 	ldu = kzalloc(sizeof(*ldu), GFP_KERNEL);
366 	if (!ldu)
367 		return -ENOMEM;
368 
369 	ldu->base.unit = unit;
370 	crtc = &ldu->base.crtc;
371 	encoder = &ldu->base.encoder;
372 	connector = &ldu->base.connector;
373 	primary = &ldu->base.primary;
374 	cursor = &ldu->base.cursor;
375 
376 	INIT_LIST_HEAD(&ldu->active);
377 
378 	ldu->base.pref_active = (unit == 0);
379 	ldu->base.pref_width = dev_priv->initial_width;
380 	ldu->base.pref_height = dev_priv->initial_height;
381 	ldu->base.pref_mode = NULL;
382 
383 	/*
384 	 * Remove this after enabling atomic because property values can
385 	 * only exist in a state object
386 	 */
387 	ldu->base.is_implicit = true;
388 
389 	/* Initialize primary plane */
390 	vmw_du_plane_reset(primary);
391 
392 	ret = drm_universal_plane_init(dev, &ldu->base.primary,
393 				       0, &vmw_ldu_plane_funcs,
394 				       vmw_primary_plane_formats,
395 				       ARRAY_SIZE(vmw_primary_plane_formats),
396 				       NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
397 	if (ret) {
398 		DRM_ERROR("Failed to initialize primary plane");
399 		goto err_free;
400 	}
401 
402 	drm_plane_helper_add(primary, &vmw_ldu_primary_plane_helper_funcs);
403 
404 	/* Initialize cursor plane */
405 	vmw_du_plane_reset(cursor);
406 
407 	ret = drm_universal_plane_init(dev, &ldu->base.cursor,
408 			0, &vmw_ldu_cursor_funcs,
409 			vmw_cursor_plane_formats,
410 			ARRAY_SIZE(vmw_cursor_plane_formats),
411 			NULL, DRM_PLANE_TYPE_CURSOR, NULL);
412 	if (ret) {
413 		DRM_ERROR("Failed to initialize cursor plane");
414 		drm_plane_cleanup(&ldu->base.primary);
415 		goto err_free;
416 	}
417 
418 	drm_plane_helper_add(cursor, &vmw_ldu_cursor_plane_helper_funcs);
419 
420 
421 	vmw_du_connector_reset(connector);
422 	ret = drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
423 				 DRM_MODE_CONNECTOR_VIRTUAL);
424 	if (ret) {
425 		DRM_ERROR("Failed to initialize connector\n");
426 		goto err_free;
427 	}
428 
429 	drm_connector_helper_add(connector, &vmw_ldu_connector_helper_funcs);
430 	connector->status = vmw_du_connector_detect(connector, true);
431 	vmw_connector_state_to_vcs(connector->state)->is_implicit = true;
432 
433 
434 	ret = drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs,
435 			       DRM_MODE_ENCODER_VIRTUAL, NULL);
436 	if (ret) {
437 		DRM_ERROR("Failed to initialize encoder\n");
438 		goto err_free_connector;
439 	}
440 
441 	(void) drm_mode_connector_attach_encoder(connector, encoder);
442 	encoder->possible_crtcs = (1 << unit);
443 	encoder->possible_clones = 0;
444 
445 	ret = drm_connector_register(connector);
446 	if (ret) {
447 		DRM_ERROR("Failed to register connector\n");
448 		goto err_free_encoder;
449 	}
450 
451 
452 	vmw_du_crtc_reset(crtc);
453 	ret = drm_crtc_init_with_planes(dev, crtc, &ldu->base.primary,
454 					&ldu->base.cursor,
455 					&vmw_legacy_crtc_funcs, NULL);
456 	if (ret) {
457 		DRM_ERROR("Failed to initialize CRTC\n");
458 		goto err_free_unregister;
459 	}
460 
461 	drm_crtc_helper_add(crtc, &vmw_ldu_crtc_helper_funcs);
462 
463 	drm_mode_crtc_set_gamma_size(crtc, 256);
464 
465 	drm_object_attach_property(&connector->base,
466 				   dev_priv->hotplug_mode_update_property, 1);
467 	drm_object_attach_property(&connector->base,
468 				   dev->mode_config.suggested_x_property, 0);
469 	drm_object_attach_property(&connector->base,
470 				   dev->mode_config.suggested_y_property, 0);
471 	if (dev_priv->implicit_placement_property)
472 		drm_object_attach_property
473 			(&connector->base,
474 			 dev_priv->implicit_placement_property,
475 			 1);
476 
477 	return 0;
478 
479 err_free_unregister:
480 	drm_connector_unregister(connector);
481 err_free_encoder:
482 	drm_encoder_cleanup(encoder);
483 err_free_connector:
484 	drm_connector_cleanup(connector);
485 err_free:
486 	kfree(ldu);
487 	return ret;
488 }
489 
490 int vmw_kms_ldu_init_display(struct vmw_private *dev_priv)
491 {
492 	struct drm_device *dev = dev_priv->dev;
493 	int i, ret;
494 
495 	if (dev_priv->ldu_priv) {
496 		DRM_INFO("ldu system already on\n");
497 		return -EINVAL;
498 	}
499 
500 	dev_priv->ldu_priv = kmalloc(sizeof(*dev_priv->ldu_priv), GFP_KERNEL);
501 	if (!dev_priv->ldu_priv)
502 		return -ENOMEM;
503 
504 	INIT_LIST_HEAD(&dev_priv->ldu_priv->active);
505 	dev_priv->ldu_priv->num_active = 0;
506 	dev_priv->ldu_priv->last_num_active = 0;
507 	dev_priv->ldu_priv->fb = NULL;
508 
509 	/* for old hardware without multimon only enable one display */
510 	if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
511 		ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
512 	else
513 		ret = drm_vblank_init(dev, 1);
514 	if (ret != 0)
515 		goto err_free;
516 
517 	vmw_kms_create_implicit_placement_property(dev_priv, true);
518 
519 	if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
520 		for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
521 			vmw_ldu_init(dev_priv, i);
522 	else
523 		vmw_ldu_init(dev_priv, 0);
524 
525 	dev_priv->active_display_unit = vmw_du_legacy;
526 
527 	DRM_INFO("Legacy Display Unit initialized\n");
528 
529 	return 0;
530 
531 err_free:
532 	kfree(dev_priv->ldu_priv);
533 	dev_priv->ldu_priv = NULL;
534 	return ret;
535 }
536 
537 int vmw_kms_ldu_close_display(struct vmw_private *dev_priv)
538 {
539 	if (!dev_priv->ldu_priv)
540 		return -ENOSYS;
541 
542 	BUG_ON(!list_empty(&dev_priv->ldu_priv->active));
543 
544 	kfree(dev_priv->ldu_priv);
545 
546 	return 0;
547 }
548 
549 
550 int vmw_kms_ldu_do_dmabuf_dirty(struct vmw_private *dev_priv,
551 				struct vmw_framebuffer *framebuffer,
552 				unsigned flags, unsigned color,
553 				struct drm_clip_rect *clips,
554 				unsigned num_clips, int increment)
555 {
556 	size_t fifo_size;
557 	int i;
558 
559 	struct {
560 		uint32_t header;
561 		SVGAFifoCmdUpdate body;
562 	} *cmd;
563 
564 	fifo_size = sizeof(*cmd) * num_clips;
565 	cmd = vmw_fifo_reserve(dev_priv, fifo_size);
566 	if (unlikely(cmd == NULL)) {
567 		DRM_ERROR("Fifo reserve failed.\n");
568 		return -ENOMEM;
569 	}
570 
571 	memset(cmd, 0, fifo_size);
572 	for (i = 0; i < num_clips; i++, clips += increment) {
573 		cmd[i].header = SVGA_CMD_UPDATE;
574 		cmd[i].body.x = clips->x1;
575 		cmd[i].body.y = clips->y1;
576 		cmd[i].body.width = clips->x2 - clips->x1;
577 		cmd[i].body.height = clips->y2 - clips->y1;
578 	}
579 
580 	vmw_fifo_commit(dev_priv, fifo_size);
581 	return 0;
582 }
583