1 // SPDX-License-Identifier: GPL-2.0 OR MIT
2 /**************************************************************************
3  *
4  * Copyright 2009-2015 VMware, Inc., Palo Alto, CA., USA
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 = drm_atomic_helper_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 	.destroy = vmw_ldu_connector_destroy,
267 	.reset = vmw_du_connector_reset,
268 	.atomic_duplicate_state = vmw_du_connector_duplicate_state,
269 	.atomic_destroy_state = vmw_du_connector_destroy_state,
270 };
271 
272 static const struct
273 drm_connector_helper_funcs vmw_ldu_connector_helper_funcs = {
274 };
275 
276 /*
277  * Legacy Display Plane Functions
278  */
279 
280 static void
281 vmw_ldu_primary_plane_atomic_update(struct drm_plane *plane,
282 				    struct drm_plane_state *old_state)
283 {
284 	struct vmw_private *dev_priv;
285 	struct vmw_legacy_display_unit *ldu;
286 	struct vmw_framebuffer *vfb;
287 	struct drm_framebuffer *fb;
288 	struct drm_crtc *crtc = plane->state->crtc ?: old_state->crtc;
289 
290 
291 	ldu = vmw_crtc_to_ldu(crtc);
292 	dev_priv = vmw_priv(plane->dev);
293 	fb       = plane->state->fb;
294 
295 	vfb = (fb) ? vmw_framebuffer_to_vfb(fb) : NULL;
296 
297 	if (vfb)
298 		vmw_ldu_add_active(dev_priv, ldu, vfb);
299 	else
300 		vmw_ldu_del_active(dev_priv, ldu);
301 
302 	vmw_ldu_commit_list(dev_priv);
303 }
304 
305 
306 static const struct drm_plane_funcs vmw_ldu_plane_funcs = {
307 	.update_plane = drm_atomic_helper_update_plane,
308 	.disable_plane = drm_atomic_helper_disable_plane,
309 	.destroy = vmw_du_primary_plane_destroy,
310 	.reset = vmw_du_plane_reset,
311 	.atomic_duplicate_state = vmw_du_plane_duplicate_state,
312 	.atomic_destroy_state = vmw_du_plane_destroy_state,
313 };
314 
315 static const struct drm_plane_funcs vmw_ldu_cursor_funcs = {
316 	.update_plane = drm_atomic_helper_update_plane,
317 	.disable_plane = drm_atomic_helper_disable_plane,
318 	.destroy = vmw_du_cursor_plane_destroy,
319 	.reset = vmw_du_plane_reset,
320 	.atomic_duplicate_state = vmw_du_plane_duplicate_state,
321 	.atomic_destroy_state = vmw_du_plane_destroy_state,
322 };
323 
324 /*
325  * Atomic Helpers
326  */
327 static const struct
328 drm_plane_helper_funcs vmw_ldu_cursor_plane_helper_funcs = {
329 	.atomic_check = vmw_du_cursor_plane_atomic_check,
330 	.atomic_update = vmw_du_cursor_plane_atomic_update,
331 	.prepare_fb = vmw_du_cursor_plane_prepare_fb,
332 	.cleanup_fb = vmw_du_plane_cleanup_fb,
333 };
334 
335 static const struct
336 drm_plane_helper_funcs vmw_ldu_primary_plane_helper_funcs = {
337 	.atomic_check = vmw_du_primary_plane_atomic_check,
338 	.atomic_update = vmw_ldu_primary_plane_atomic_update,
339 };
340 
341 static const struct drm_crtc_helper_funcs vmw_ldu_crtc_helper_funcs = {
342 	.mode_set_nofb = vmw_ldu_crtc_mode_set_nofb,
343 	.atomic_check = vmw_du_crtc_atomic_check,
344 	.atomic_begin = vmw_du_crtc_atomic_begin,
345 	.atomic_flush = vmw_du_crtc_atomic_flush,
346 	.atomic_enable = vmw_ldu_crtc_atomic_enable,
347 	.atomic_disable = vmw_ldu_crtc_atomic_disable,
348 };
349 
350 
351 static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
352 {
353 	struct vmw_legacy_display_unit *ldu;
354 	struct drm_device *dev = dev_priv->dev;
355 	struct drm_connector *connector;
356 	struct drm_encoder *encoder;
357 	struct drm_plane *primary, *cursor;
358 	struct drm_crtc *crtc;
359 	int ret;
360 
361 	ldu = kzalloc(sizeof(*ldu), GFP_KERNEL);
362 	if (!ldu)
363 		return -ENOMEM;
364 
365 	ldu->base.unit = unit;
366 	crtc = &ldu->base.crtc;
367 	encoder = &ldu->base.encoder;
368 	connector = &ldu->base.connector;
369 	primary = &ldu->base.primary;
370 	cursor = &ldu->base.cursor;
371 
372 	INIT_LIST_HEAD(&ldu->active);
373 
374 	ldu->base.pref_active = (unit == 0);
375 	ldu->base.pref_width = dev_priv->initial_width;
376 	ldu->base.pref_height = dev_priv->initial_height;
377 	ldu->base.pref_mode = NULL;
378 
379 	/*
380 	 * Remove this after enabling atomic because property values can
381 	 * only exist in a state object
382 	 */
383 	ldu->base.is_implicit = true;
384 
385 	/* Initialize primary plane */
386 	vmw_du_plane_reset(primary);
387 
388 	ret = drm_universal_plane_init(dev, &ldu->base.primary,
389 				       0, &vmw_ldu_plane_funcs,
390 				       vmw_primary_plane_formats,
391 				       ARRAY_SIZE(vmw_primary_plane_formats),
392 				       NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
393 	if (ret) {
394 		DRM_ERROR("Failed to initialize primary plane");
395 		goto err_free;
396 	}
397 
398 	drm_plane_helper_add(primary, &vmw_ldu_primary_plane_helper_funcs);
399 
400 	/* Initialize cursor plane */
401 	vmw_du_plane_reset(cursor);
402 
403 	ret = drm_universal_plane_init(dev, &ldu->base.cursor,
404 			0, &vmw_ldu_cursor_funcs,
405 			vmw_cursor_plane_formats,
406 			ARRAY_SIZE(vmw_cursor_plane_formats),
407 			NULL, DRM_PLANE_TYPE_CURSOR, NULL);
408 	if (ret) {
409 		DRM_ERROR("Failed to initialize cursor plane");
410 		drm_plane_cleanup(&ldu->base.primary);
411 		goto err_free;
412 	}
413 
414 	drm_plane_helper_add(cursor, &vmw_ldu_cursor_plane_helper_funcs);
415 
416 	vmw_du_connector_reset(connector);
417 	ret = drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
418 				 DRM_MODE_CONNECTOR_VIRTUAL);
419 	if (ret) {
420 		DRM_ERROR("Failed to initialize connector\n");
421 		goto err_free;
422 	}
423 
424 	drm_connector_helper_add(connector, &vmw_ldu_connector_helper_funcs);
425 	connector->status = vmw_du_connector_detect(connector, true);
426 
427 	ret = drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs,
428 			       DRM_MODE_ENCODER_VIRTUAL, NULL);
429 	if (ret) {
430 		DRM_ERROR("Failed to initialize encoder\n");
431 		goto err_free_connector;
432 	}
433 
434 	(void) drm_connector_attach_encoder(connector, encoder);
435 	encoder->possible_crtcs = (1 << unit);
436 	encoder->possible_clones = 0;
437 
438 	ret = drm_connector_register(connector);
439 	if (ret) {
440 		DRM_ERROR("Failed to register connector\n");
441 		goto err_free_encoder;
442 	}
443 
444 	vmw_du_crtc_reset(crtc);
445 	ret = drm_crtc_init_with_planes(dev, crtc, &ldu->base.primary,
446 					&ldu->base.cursor,
447 					&vmw_legacy_crtc_funcs, NULL);
448 	if (ret) {
449 		DRM_ERROR("Failed to initialize CRTC\n");
450 		goto err_free_unregister;
451 	}
452 
453 	drm_crtc_helper_add(crtc, &vmw_ldu_crtc_helper_funcs);
454 
455 	drm_mode_crtc_set_gamma_size(crtc, 256);
456 
457 	drm_object_attach_property(&connector->base,
458 				   dev_priv->hotplug_mode_update_property, 1);
459 	drm_object_attach_property(&connector->base,
460 				   dev->mode_config.suggested_x_property, 0);
461 	drm_object_attach_property(&connector->base,
462 				   dev->mode_config.suggested_y_property, 0);
463 	if (dev_priv->implicit_placement_property)
464 		drm_object_attach_property
465 			(&connector->base,
466 			 dev_priv->implicit_placement_property,
467 			 1);
468 
469 	return 0;
470 
471 err_free_unregister:
472 	drm_connector_unregister(connector);
473 err_free_encoder:
474 	drm_encoder_cleanup(encoder);
475 err_free_connector:
476 	drm_connector_cleanup(connector);
477 err_free:
478 	kfree(ldu);
479 	return ret;
480 }
481 
482 int vmw_kms_ldu_init_display(struct vmw_private *dev_priv)
483 {
484 	struct drm_device *dev = dev_priv->dev;
485 	int i, ret;
486 
487 	if (dev_priv->ldu_priv) {
488 		DRM_INFO("ldu system already on\n");
489 		return -EINVAL;
490 	}
491 
492 	dev_priv->ldu_priv = kmalloc(sizeof(*dev_priv->ldu_priv), GFP_KERNEL);
493 	if (!dev_priv->ldu_priv)
494 		return -ENOMEM;
495 
496 	INIT_LIST_HEAD(&dev_priv->ldu_priv->active);
497 	dev_priv->ldu_priv->num_active = 0;
498 	dev_priv->ldu_priv->last_num_active = 0;
499 	dev_priv->ldu_priv->fb = NULL;
500 
501 	/* for old hardware without multimon only enable one display */
502 	if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
503 		ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
504 	else
505 		ret = drm_vblank_init(dev, 1);
506 	if (ret != 0)
507 		goto err_free;
508 
509 	vmw_kms_create_implicit_placement_property(dev_priv);
510 
511 	if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
512 		for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
513 			vmw_ldu_init(dev_priv, i);
514 	else
515 		vmw_ldu_init(dev_priv, 0);
516 
517 	dev_priv->active_display_unit = vmw_du_legacy;
518 
519 	DRM_INFO("Legacy Display Unit initialized\n");
520 
521 	return 0;
522 
523 err_free:
524 	kfree(dev_priv->ldu_priv);
525 	dev_priv->ldu_priv = NULL;
526 	return ret;
527 }
528 
529 int vmw_kms_ldu_close_display(struct vmw_private *dev_priv)
530 {
531 	if (!dev_priv->ldu_priv)
532 		return -ENOSYS;
533 
534 	BUG_ON(!list_empty(&dev_priv->ldu_priv->active));
535 
536 	kfree(dev_priv->ldu_priv);
537 
538 	return 0;
539 }
540 
541 
542 int vmw_kms_ldu_do_bo_dirty(struct vmw_private *dev_priv,
543 			    struct vmw_framebuffer *framebuffer,
544 			    unsigned int flags, unsigned int color,
545 			    struct drm_clip_rect *clips,
546 			    unsigned int num_clips, int increment)
547 {
548 	size_t fifo_size;
549 	int i;
550 
551 	struct {
552 		uint32_t header;
553 		SVGAFifoCmdUpdate body;
554 	} *cmd;
555 
556 	fifo_size = sizeof(*cmd) * num_clips;
557 	cmd = VMW_FIFO_RESERVE(dev_priv, fifo_size);
558 	if (unlikely(cmd == NULL))
559 		return -ENOMEM;
560 
561 	memset(cmd, 0, fifo_size);
562 	for (i = 0; i < num_clips; i++, clips += increment) {
563 		cmd[i].header = SVGA_CMD_UPDATE;
564 		cmd[i].body.x = clips->x1;
565 		cmd[i].body.y = clips->y1;
566 		cmd[i].body.width = clips->x2 - clips->x1;
567 		cmd[i].body.height = clips->y2 - clips->y1;
568 	}
569 
570 	vmw_fifo_commit(dev_priv, fifo_size);
571 	return 0;
572 }
573