1 /**************************************************************************
2  *
3  * Copyright © 2009 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_display_unit_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->bits_per_pixel, fb->depth);
101 	}
102 
103 	if (!list_empty(&lds->active)) {
104 		entry = list_entry(lds->active.next, typeof(*entry), active);
105 		fb = entry->base.crtc.primary->fb;
106 
107 		vmw_kms_write_svga(dev_priv, fb->width, fb->height, fb->pitches[0],
108 				   fb->bits_per_pixel, fb->depth);
109 	}
110 
111 	/* Make sure we always show something. */
112 	vmw_write(dev_priv, SVGA_REG_NUM_GUEST_DISPLAYS,
113 		  lds->num_active ? lds->num_active : 1);
114 
115 	i = 0;
116 	list_for_each_entry(entry, &lds->active, active) {
117 		crtc = &entry->base.crtc;
118 
119 		vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, i);
120 		vmw_write(dev_priv, SVGA_REG_DISPLAY_IS_PRIMARY, !i);
121 		vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_X, crtc->x);
122 		vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_Y, crtc->y);
123 		vmw_write(dev_priv, SVGA_REG_DISPLAY_WIDTH, crtc->mode.hdisplay);
124 		vmw_write(dev_priv, SVGA_REG_DISPLAY_HEIGHT, crtc->mode.vdisplay);
125 		vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
126 
127 		i++;
128 	}
129 
130 	BUG_ON(i != lds->num_active);
131 
132 	lds->last_num_active = lds->num_active;
133 
134 
135 	/* Find the first du with a cursor. */
136 	list_for_each_entry(entry, &lds->active, active) {
137 		du = &entry->base;
138 
139 		if (!du->cursor_dmabuf)
140 			continue;
141 
142 		ret = vmw_cursor_update_dmabuf(dev_priv,
143 					       du->cursor_dmabuf,
144 					       64, 64,
145 					       du->hotspot_x,
146 					       du->hotspot_y);
147 		if (ret == 0)
148 			break;
149 
150 		DRM_ERROR("Could not update cursor image\n");
151 	}
152 
153 	return 0;
154 }
155 
156 static int vmw_ldu_del_active(struct vmw_private *vmw_priv,
157 			      struct vmw_legacy_display_unit *ldu)
158 {
159 	struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
160 	if (list_empty(&ldu->active))
161 		return 0;
162 
163 	/* Must init otherwise list_empty(&ldu->active) will not work. */
164 	list_del_init(&ldu->active);
165 	if (--(ld->num_active) == 0) {
166 		BUG_ON(!ld->fb);
167 		if (ld->fb->unpin)
168 			ld->fb->unpin(ld->fb);
169 		ld->fb = NULL;
170 	}
171 
172 	return 0;
173 }
174 
175 static int vmw_ldu_add_active(struct vmw_private *vmw_priv,
176 			      struct vmw_legacy_display_unit *ldu,
177 			      struct vmw_framebuffer *vfb)
178 {
179 	struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
180 	struct vmw_legacy_display_unit *entry;
181 	struct list_head *at;
182 
183 	BUG_ON(!ld->num_active && ld->fb);
184 	if (vfb != ld->fb) {
185 		if (ld->fb && ld->fb->unpin)
186 			ld->fb->unpin(ld->fb);
187 		if (vfb->pin)
188 			vfb->pin(vfb);
189 		ld->fb = vfb;
190 	}
191 
192 	if (!list_empty(&ldu->active))
193 		return 0;
194 
195 	at = &ld->active;
196 	list_for_each_entry(entry, &ld->active, active) {
197 		if (entry->base.unit > ldu->base.unit)
198 			break;
199 
200 		at = &entry->active;
201 	}
202 
203 	list_add(&ldu->active, at);
204 
205 	ld->num_active++;
206 
207 	return 0;
208 }
209 
210 static int vmw_ldu_crtc_set_config(struct drm_mode_set *set)
211 {
212 	struct vmw_private *dev_priv;
213 	struct vmw_legacy_display_unit *ldu;
214 	struct drm_connector *connector;
215 	struct drm_display_mode *mode;
216 	struct drm_encoder *encoder;
217 	struct vmw_framebuffer *vfb;
218 	struct drm_framebuffer *fb;
219 	struct drm_crtc *crtc;
220 
221 	if (!set)
222 		return -EINVAL;
223 
224 	if (!set->crtc)
225 		return -EINVAL;
226 
227 	/* get the ldu */
228 	crtc = set->crtc;
229 	ldu = vmw_crtc_to_ldu(crtc);
230 	vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL;
231 	dev_priv = vmw_priv(crtc->dev);
232 
233 	if (set->num_connectors > 1) {
234 		DRM_ERROR("to many connectors\n");
235 		return -EINVAL;
236 	}
237 
238 	if (set->num_connectors == 1 &&
239 	    set->connectors[0] != &ldu->base.connector) {
240 		DRM_ERROR("connector doesn't match %p %p\n",
241 			set->connectors[0], &ldu->base.connector);
242 		return -EINVAL;
243 	}
244 
245 	/* ldu only supports one fb active at the time */
246 	if (dev_priv->ldu_priv->fb && vfb &&
247 	    !(dev_priv->ldu_priv->num_active == 1 &&
248 	      !list_empty(&ldu->active)) &&
249 	    dev_priv->ldu_priv->fb != vfb) {
250 		DRM_ERROR("Multiple framebuffers not supported\n");
251 		return -EINVAL;
252 	}
253 
254 	/* since they always map one to one these are safe */
255 	connector = &ldu->base.connector;
256 	encoder = &ldu->base.encoder;
257 
258 	/* should we turn the crtc off? */
259 	if (set->num_connectors == 0 || !set->mode || !set->fb) {
260 
261 		connector->encoder = NULL;
262 		encoder->crtc = NULL;
263 		crtc->primary->fb = NULL;
264 		crtc->enabled = false;
265 
266 		vmw_ldu_del_active(dev_priv, ldu);
267 
268 		return vmw_ldu_commit_list(dev_priv);
269 	}
270 
271 
272 	/* we now know we want to set a mode */
273 	mode = set->mode;
274 	fb = set->fb;
275 
276 	if (set->x + mode->hdisplay > fb->width ||
277 	    set->y + mode->vdisplay > fb->height) {
278 		DRM_ERROR("set outside of framebuffer\n");
279 		return -EINVAL;
280 	}
281 
282 	vmw_fb_off(dev_priv);
283 
284 	crtc->primary->fb = fb;
285 	encoder->crtc = crtc;
286 	connector->encoder = encoder;
287 	crtc->x = set->x;
288 	crtc->y = set->y;
289 	crtc->mode = *mode;
290 	crtc->enabled = true;
291 
292 	vmw_ldu_add_active(dev_priv, ldu, vfb);
293 
294 	return vmw_ldu_commit_list(dev_priv);
295 }
296 
297 static struct drm_crtc_funcs vmw_legacy_crtc_funcs = {
298 	.save = vmw_du_crtc_save,
299 	.restore = vmw_du_crtc_restore,
300 	.cursor_set = vmw_du_crtc_cursor_set,
301 	.cursor_move = vmw_du_crtc_cursor_move,
302 	.gamma_set = vmw_du_crtc_gamma_set,
303 	.destroy = vmw_ldu_crtc_destroy,
304 	.set_config = vmw_ldu_crtc_set_config,
305 };
306 
307 
308 /*
309  * Legacy Display Unit encoder functions
310  */
311 
312 static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder)
313 {
314 	vmw_ldu_destroy(vmw_encoder_to_ldu(encoder));
315 }
316 
317 static struct drm_encoder_funcs vmw_legacy_encoder_funcs = {
318 	.destroy = vmw_ldu_encoder_destroy,
319 };
320 
321 /*
322  * Legacy Display Unit connector functions
323  */
324 
325 static void vmw_ldu_connector_destroy(struct drm_connector *connector)
326 {
327 	vmw_ldu_destroy(vmw_connector_to_ldu(connector));
328 }
329 
330 static struct drm_connector_funcs vmw_legacy_connector_funcs = {
331 	.dpms = vmw_du_connector_dpms,
332 	.save = vmw_du_connector_save,
333 	.restore = vmw_du_connector_restore,
334 	.detect = vmw_du_connector_detect,
335 	.fill_modes = vmw_du_connector_fill_modes,
336 	.set_property = vmw_du_connector_set_property,
337 	.destroy = vmw_ldu_connector_destroy,
338 };
339 
340 static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
341 {
342 	struct vmw_legacy_display_unit *ldu;
343 	struct drm_device *dev = dev_priv->dev;
344 	struct drm_connector *connector;
345 	struct drm_encoder *encoder;
346 	struct drm_crtc *crtc;
347 
348 	ldu = kzalloc(sizeof(*ldu), GFP_KERNEL);
349 	if (!ldu)
350 		return -ENOMEM;
351 
352 	ldu->base.unit = unit;
353 	crtc = &ldu->base.crtc;
354 	encoder = &ldu->base.encoder;
355 	connector = &ldu->base.connector;
356 
357 	INIT_LIST_HEAD(&ldu->active);
358 
359 	ldu->base.pref_active = (unit == 0);
360 	ldu->base.pref_width = dev_priv->initial_width;
361 	ldu->base.pref_height = dev_priv->initial_height;
362 	ldu->base.pref_mode = NULL;
363 	ldu->base.is_implicit = true;
364 
365 	drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
366 			   DRM_MODE_CONNECTOR_VIRTUAL);
367 	connector->status = vmw_du_connector_detect(connector, true);
368 
369 	drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs,
370 			 DRM_MODE_ENCODER_VIRTUAL);
371 	drm_mode_connector_attach_encoder(connector, encoder);
372 	encoder->possible_crtcs = (1 << unit);
373 	encoder->possible_clones = 0;
374 
375 	(void) drm_connector_register(connector);
376 
377 	drm_crtc_init(dev, crtc, &vmw_legacy_crtc_funcs);
378 
379 	drm_mode_crtc_set_gamma_size(crtc, 256);
380 
381 	drm_object_attach_property(&connector->base,
382 				      dev->mode_config.dirty_info_property,
383 				      1);
384 
385 	return 0;
386 }
387 
388 int vmw_kms_init_legacy_display_system(struct vmw_private *dev_priv)
389 {
390 	struct drm_device *dev = dev_priv->dev;
391 	int i, ret;
392 
393 	if (dev_priv->ldu_priv) {
394 		DRM_INFO("ldu system already on\n");
395 		return -EINVAL;
396 	}
397 
398 	dev_priv->ldu_priv = kmalloc(sizeof(*dev_priv->ldu_priv), GFP_KERNEL);
399 	if (!dev_priv->ldu_priv)
400 		return -ENOMEM;
401 
402 	INIT_LIST_HEAD(&dev_priv->ldu_priv->active);
403 	dev_priv->ldu_priv->num_active = 0;
404 	dev_priv->ldu_priv->last_num_active = 0;
405 	dev_priv->ldu_priv->fb = NULL;
406 
407 	/* for old hardware without multimon only enable one display */
408 	if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
409 		ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
410 	else
411 		ret = drm_vblank_init(dev, 1);
412 	if (ret != 0)
413 		goto err_free;
414 
415 	ret = drm_mode_create_dirty_info_property(dev);
416 	if (ret != 0)
417 		goto err_vblank_cleanup;
418 
419 	if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
420 		for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
421 			vmw_ldu_init(dev_priv, i);
422 	else
423 		vmw_ldu_init(dev_priv, 0);
424 
425 	return 0;
426 
427 err_vblank_cleanup:
428 	drm_vblank_cleanup(dev);
429 err_free:
430 	kfree(dev_priv->ldu_priv);
431 	dev_priv->ldu_priv = NULL;
432 	return ret;
433 }
434 
435 int vmw_kms_close_legacy_display_system(struct vmw_private *dev_priv)
436 {
437 	struct drm_device *dev = dev_priv->dev;
438 
439 	if (!dev_priv->ldu_priv)
440 		return -ENOSYS;
441 
442 	drm_vblank_cleanup(dev);
443 
444 	BUG_ON(!list_empty(&dev_priv->ldu_priv->active));
445 
446 	kfree(dev_priv->ldu_priv);
447 
448 	return 0;
449 }
450