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 
31 
32 #define vmw_crtc_to_ldu(x) \
33 	container_of(x, struct vmw_legacy_display_unit, base.crtc)
34 #define vmw_encoder_to_ldu(x) \
35 	container_of(x, struct vmw_legacy_display_unit, base.encoder)
36 #define vmw_connector_to_ldu(x) \
37 	container_of(x, struct vmw_legacy_display_unit, base.connector)
38 
39 struct vmw_legacy_display {
40 	struct list_head active;
41 
42 	unsigned num_active;
43 	unsigned last_num_active;
44 
45 	struct vmw_framebuffer *fb;
46 };
47 
48 /**
49  * Display unit using the legacy register interface.
50  */
51 struct vmw_legacy_display_unit {
52 	struct vmw_display_unit base;
53 
54 	struct list_head active;
55 };
56 
57 static void vmw_ldu_destroy(struct vmw_legacy_display_unit *ldu)
58 {
59 	list_del_init(&ldu->active);
60 	vmw_du_cleanup(&ldu->base);
61 	kfree(ldu);
62 }
63 
64 
65 /*
66  * Legacy Display Unit CRTC functions
67  */
68 
69 static void vmw_ldu_crtc_destroy(struct drm_crtc *crtc)
70 {
71 	vmw_ldu_destroy(vmw_crtc_to_ldu(crtc));
72 }
73 
74 static int vmw_ldu_commit_list(struct vmw_private *dev_priv)
75 {
76 	struct vmw_legacy_display *lds = dev_priv->ldu_priv;
77 	struct vmw_legacy_display_unit *entry;
78 	struct vmw_display_unit *du = NULL;
79 	struct drm_framebuffer *fb = NULL;
80 	struct drm_crtc *crtc = NULL;
81 	int i = 0, ret;
82 
83 	/* If there is no display topology the host just assumes
84 	 * that the guest will set the same layout as the host.
85 	 */
86 	if (!(dev_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY)) {
87 		int w = 0, h = 0;
88 		list_for_each_entry(entry, &lds->active, active) {
89 			crtc = &entry->base.crtc;
90 			w = max(w, crtc->x + crtc->mode.hdisplay);
91 			h = max(h, crtc->y + crtc->mode.vdisplay);
92 			i++;
93 		}
94 
95 		if (crtc == NULL)
96 			return 0;
97 		fb = entry->base.crtc.primary->fb;
98 
99 		return vmw_kms_write_svga(dev_priv, w, h, fb->pitches[0],
100 					  fb->format->cpp[0] * 8,
101 					  fb->format->depth);
102 	}
103 
104 	if (!list_empty(&lds->active)) {
105 		entry = list_entry(lds->active.next, typeof(*entry), active);
106 		fb = entry->base.crtc.primary->fb;
107 
108 		vmw_kms_write_svga(dev_priv, fb->width, fb->height, fb->pitches[0],
109 				   fb->format->cpp[0] * 8, fb->format->depth);
110 	}
111 
112 	/* Make sure we always show something. */
113 	vmw_write(dev_priv, SVGA_REG_NUM_GUEST_DISPLAYS,
114 		  lds->num_active ? lds->num_active : 1);
115 
116 	i = 0;
117 	list_for_each_entry(entry, &lds->active, active) {
118 		crtc = &entry->base.crtc;
119 
120 		vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, i);
121 		vmw_write(dev_priv, SVGA_REG_DISPLAY_IS_PRIMARY, !i);
122 		vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_X, crtc->x);
123 		vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_Y, crtc->y);
124 		vmw_write(dev_priv, SVGA_REG_DISPLAY_WIDTH, crtc->mode.hdisplay);
125 		vmw_write(dev_priv, SVGA_REG_DISPLAY_HEIGHT, crtc->mode.vdisplay);
126 		vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
127 
128 		i++;
129 	}
130 
131 	BUG_ON(i != lds->num_active);
132 
133 	lds->last_num_active = lds->num_active;
134 
135 
136 	/* Find the first du with a cursor. */
137 	list_for_each_entry(entry, &lds->active, active) {
138 		du = &entry->base;
139 
140 		if (!du->cursor_dmabuf)
141 			continue;
142 
143 		ret = vmw_cursor_update_dmabuf(dev_priv,
144 					       du->cursor_dmabuf,
145 					       64, 64,
146 					       du->hotspot_x,
147 					       du->hotspot_y);
148 		if (ret == 0)
149 			break;
150 
151 		DRM_ERROR("Could not update cursor image\n");
152 	}
153 
154 	return 0;
155 }
156 
157 static int vmw_ldu_del_active(struct vmw_private *vmw_priv,
158 			      struct vmw_legacy_display_unit *ldu)
159 {
160 	struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
161 	if (list_empty(&ldu->active))
162 		return 0;
163 
164 	/* Must init otherwise list_empty(&ldu->active) will not work. */
165 	list_del_init(&ldu->active);
166 	if (--(ld->num_active) == 0) {
167 		BUG_ON(!ld->fb);
168 		if (ld->fb->unpin)
169 			ld->fb->unpin(ld->fb);
170 		ld->fb = NULL;
171 	}
172 
173 	return 0;
174 }
175 
176 static int vmw_ldu_add_active(struct vmw_private *vmw_priv,
177 			      struct vmw_legacy_display_unit *ldu,
178 			      struct vmw_framebuffer *vfb)
179 {
180 	struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
181 	struct vmw_legacy_display_unit *entry;
182 	struct list_head *at;
183 
184 	BUG_ON(!ld->num_active && ld->fb);
185 	if (vfb != ld->fb) {
186 		if (ld->fb && ld->fb->unpin)
187 			ld->fb->unpin(ld->fb);
188 		if (vfb->pin)
189 			vfb->pin(vfb);
190 		ld->fb = vfb;
191 	}
192 
193 	if (!list_empty(&ldu->active))
194 		return 0;
195 
196 	at = &ld->active;
197 	list_for_each_entry(entry, &ld->active, active) {
198 		if (entry->base.unit > ldu->base.unit)
199 			break;
200 
201 		at = &entry->active;
202 	}
203 
204 	list_add(&ldu->active, at);
205 
206 	ld->num_active++;
207 
208 	return 0;
209 }
210 
211 static int vmw_ldu_crtc_set_config(struct drm_mode_set *set)
212 {
213 	struct vmw_private *dev_priv;
214 	struct vmw_legacy_display_unit *ldu;
215 	struct drm_connector *connector;
216 	struct drm_display_mode *mode;
217 	struct drm_encoder *encoder;
218 	struct vmw_framebuffer *vfb;
219 	struct drm_framebuffer *fb;
220 	struct drm_crtc *crtc;
221 
222 	if (!set)
223 		return -EINVAL;
224 
225 	if (!set->crtc)
226 		return -EINVAL;
227 
228 	/* get the ldu */
229 	crtc = set->crtc;
230 	ldu = vmw_crtc_to_ldu(crtc);
231 	vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL;
232 	dev_priv = vmw_priv(crtc->dev);
233 
234 	if (set->num_connectors > 1) {
235 		DRM_ERROR("to many connectors\n");
236 		return -EINVAL;
237 	}
238 
239 	if (set->num_connectors == 1 &&
240 	    set->connectors[0] != &ldu->base.connector) {
241 		DRM_ERROR("connector doesn't match %p %p\n",
242 			set->connectors[0], &ldu->base.connector);
243 		return -EINVAL;
244 	}
245 
246 	/* ldu only supports one fb active at the time */
247 	if (dev_priv->ldu_priv->fb && vfb &&
248 	    !(dev_priv->ldu_priv->num_active == 1 &&
249 	      !list_empty(&ldu->active)) &&
250 	    dev_priv->ldu_priv->fb != vfb) {
251 		DRM_ERROR("Multiple framebuffers not supported\n");
252 		return -EINVAL;
253 	}
254 
255 	/* since they always map one to one these are safe */
256 	connector = &ldu->base.connector;
257 	encoder = &ldu->base.encoder;
258 
259 	/* should we turn the crtc off? */
260 	if (set->num_connectors == 0 || !set->mode || !set->fb) {
261 
262 		connector->encoder = NULL;
263 		encoder->crtc = NULL;
264 		crtc->primary->fb = NULL;
265 		crtc->enabled = false;
266 
267 		vmw_ldu_del_active(dev_priv, ldu);
268 
269 		return vmw_ldu_commit_list(dev_priv);
270 	}
271 
272 
273 	/* we now know we want to set a mode */
274 	mode = set->mode;
275 	fb = set->fb;
276 
277 	if (set->x + mode->hdisplay > fb->width ||
278 	    set->y + mode->vdisplay > fb->height) {
279 		DRM_ERROR("set outside of framebuffer\n");
280 		return -EINVAL;
281 	}
282 
283 	vmw_svga_enable(dev_priv);
284 
285 	crtc->primary->fb = fb;
286 	encoder->crtc = crtc;
287 	connector->encoder = encoder;
288 	crtc->x = set->x;
289 	crtc->y = set->y;
290 	crtc->mode = *mode;
291 	crtc->enabled = true;
292 	ldu->base.set_gui_x = set->x;
293 	ldu->base.set_gui_y = set->y;
294 
295 	vmw_ldu_add_active(dev_priv, ldu, vfb);
296 
297 	return vmw_ldu_commit_list(dev_priv);
298 }
299 
300 static const struct drm_crtc_funcs vmw_legacy_crtc_funcs = {
301 	.cursor_set2 = vmw_du_crtc_cursor_set2,
302 	.cursor_move = vmw_du_crtc_cursor_move,
303 	.gamma_set = vmw_du_crtc_gamma_set,
304 	.destroy = vmw_ldu_crtc_destroy,
305 	.set_config = vmw_ldu_crtc_set_config,
306 };
307 
308 
309 /*
310  * Legacy Display Unit encoder functions
311  */
312 
313 static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder)
314 {
315 	vmw_ldu_destroy(vmw_encoder_to_ldu(encoder));
316 }
317 
318 static const struct drm_encoder_funcs vmw_legacy_encoder_funcs = {
319 	.destroy = vmw_ldu_encoder_destroy,
320 };
321 
322 /*
323  * Legacy Display Unit connector functions
324  */
325 
326 static void vmw_ldu_connector_destroy(struct drm_connector *connector)
327 {
328 	vmw_ldu_destroy(vmw_connector_to_ldu(connector));
329 }
330 
331 static const struct drm_connector_funcs vmw_legacy_connector_funcs = {
332 	.dpms = vmw_du_connector_dpms,
333 	.detect = vmw_du_connector_detect,
334 	.fill_modes = vmw_du_connector_fill_modes,
335 	.set_property = vmw_du_connector_set_property,
336 	.destroy = vmw_ldu_connector_destroy,
337 };
338 
339 static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
340 {
341 	struct vmw_legacy_display_unit *ldu;
342 	struct drm_device *dev = dev_priv->dev;
343 	struct drm_connector *connector;
344 	struct drm_encoder *encoder;
345 	struct drm_crtc *crtc;
346 
347 	ldu = kzalloc(sizeof(*ldu), GFP_KERNEL);
348 	if (!ldu)
349 		return -ENOMEM;
350 
351 	ldu->base.unit = unit;
352 	crtc = &ldu->base.crtc;
353 	encoder = &ldu->base.encoder;
354 	connector = &ldu->base.connector;
355 
356 	INIT_LIST_HEAD(&ldu->active);
357 
358 	ldu->base.pref_active = (unit == 0);
359 	ldu->base.pref_width = dev_priv->initial_width;
360 	ldu->base.pref_height = dev_priv->initial_height;
361 	ldu->base.pref_mode = NULL;
362 	ldu->base.is_implicit = true;
363 
364 	drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
365 			   DRM_MODE_CONNECTOR_VIRTUAL);
366 	connector->status = vmw_du_connector_detect(connector, true);
367 
368 	drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs,
369 			 DRM_MODE_ENCODER_VIRTUAL, NULL);
370 	drm_mode_connector_attach_encoder(connector, encoder);
371 	encoder->possible_crtcs = (1 << unit);
372 	encoder->possible_clones = 0;
373 
374 	(void) drm_connector_register(connector);
375 
376 	drm_crtc_init(dev, crtc, &vmw_legacy_crtc_funcs);
377 
378 	drm_mode_crtc_set_gamma_size(crtc, 256);
379 
380 	drm_object_attach_property(&connector->base,
381 				   dev_priv->hotplug_mode_update_property, 1);
382 	drm_object_attach_property(&connector->base,
383 				   dev->mode_config.suggested_x_property, 0);
384 	drm_object_attach_property(&connector->base,
385 				   dev->mode_config.suggested_y_property, 0);
386 	if (dev_priv->implicit_placement_property)
387 		drm_object_attach_property
388 			(&connector->base,
389 			 dev_priv->implicit_placement_property,
390 			 1);
391 
392 	return 0;
393 }
394 
395 int vmw_kms_ldu_init_display(struct vmw_private *dev_priv)
396 {
397 	struct drm_device *dev = dev_priv->dev;
398 	int i, ret;
399 
400 	if (dev_priv->ldu_priv) {
401 		DRM_INFO("ldu system already on\n");
402 		return -EINVAL;
403 	}
404 
405 	dev_priv->ldu_priv = kmalloc(sizeof(*dev_priv->ldu_priv), GFP_KERNEL);
406 	if (!dev_priv->ldu_priv)
407 		return -ENOMEM;
408 
409 	INIT_LIST_HEAD(&dev_priv->ldu_priv->active);
410 	dev_priv->ldu_priv->num_active = 0;
411 	dev_priv->ldu_priv->last_num_active = 0;
412 	dev_priv->ldu_priv->fb = NULL;
413 
414 	/* for old hardware without multimon only enable one display */
415 	if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
416 		ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
417 	else
418 		ret = drm_vblank_init(dev, 1);
419 	if (ret != 0)
420 		goto err_free;
421 
422 	vmw_kms_create_implicit_placement_property(dev_priv, true);
423 
424 	if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
425 		for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
426 			vmw_ldu_init(dev_priv, i);
427 	else
428 		vmw_ldu_init(dev_priv, 0);
429 
430 	dev_priv->active_display_unit = vmw_du_legacy;
431 
432 	DRM_INFO("Legacy Display Unit initialized\n");
433 
434 	return 0;
435 
436 err_free:
437 	kfree(dev_priv->ldu_priv);
438 	dev_priv->ldu_priv = NULL;
439 	return ret;
440 }
441 
442 int vmw_kms_ldu_close_display(struct vmw_private *dev_priv)
443 {
444 	struct drm_device *dev = dev_priv->dev;
445 
446 	if (!dev_priv->ldu_priv)
447 		return -ENOSYS;
448 
449 	drm_vblank_cleanup(dev);
450 
451 	BUG_ON(!list_empty(&dev_priv->ldu_priv->active));
452 
453 	kfree(dev_priv->ldu_priv);
454 
455 	return 0;
456 }
457 
458 
459 int vmw_kms_ldu_do_dmabuf_dirty(struct vmw_private *dev_priv,
460 				struct vmw_framebuffer *framebuffer,
461 				unsigned flags, unsigned color,
462 				struct drm_clip_rect *clips,
463 				unsigned num_clips, int increment)
464 {
465 	size_t fifo_size;
466 	int i;
467 
468 	struct {
469 		uint32_t header;
470 		SVGAFifoCmdUpdate body;
471 	} *cmd;
472 
473 	fifo_size = sizeof(*cmd) * num_clips;
474 	cmd = vmw_fifo_reserve(dev_priv, fifo_size);
475 	if (unlikely(cmd == NULL)) {
476 		DRM_ERROR("Fifo reserve failed.\n");
477 		return -ENOMEM;
478 	}
479 
480 	memset(cmd, 0, fifo_size);
481 	for (i = 0; i < num_clips; i++, clips += increment) {
482 		cmd[i].header = SVGA_CMD_UPDATE;
483 		cmd[i].body.x = clips->x1;
484 		cmd[i].body.y = clips->y1;
485 		cmd[i].body.width = clips->x2 - clips->x1;
486 		cmd[i].body.height = clips->y2 - clips->y1;
487 	}
488 
489 	vmw_fifo_commit(dev_priv, fifo_size);
490 	return 0;
491 }
492