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
30
31#define vmw_crtc_to_ldu(x) \
32	container_of(x, struct vmw_legacy_display_unit, base.crtc)
33#define vmw_encoder_to_ldu(x) \
34	container_of(x, struct vmw_legacy_display_unit, base.encoder)
35#define vmw_connector_to_ldu(x) \
36	container_of(x, struct vmw_legacy_display_unit, base.connector)
37
38struct vmw_legacy_display {
39	struct list_head active;
40
41	unsigned num_active;
42	unsigned last_num_active;
43
44	struct vmw_framebuffer *fb;
45};
46
47/**
48 * Display unit using the legacy register interface.
49 */
50struct vmw_legacy_display_unit {
51	struct vmw_display_unit base;
52
53	struct list_head active;
54};
55
56static void vmw_ldu_destroy(struct vmw_legacy_display_unit *ldu)
57{
58	list_del_init(&ldu->active);
59	vmw_display_unit_cleanup(&ldu->base);
60	kfree(ldu);
61}
62
63
64/*
65 * Legacy Display Unit CRTC functions
66 */
67
68static void vmw_ldu_crtc_destroy(struct drm_crtc *crtc)
69{
70	vmw_ldu_destroy(vmw_crtc_to_ldu(crtc));
71}
72
73static int vmw_ldu_commit_list(struct vmw_private *dev_priv)
74{
75	struct vmw_legacy_display *lds = dev_priv->ldu_priv;
76	struct vmw_legacy_display_unit *entry;
77	struct vmw_display_unit *du = NULL;
78	struct drm_framebuffer *fb = NULL;
79	struct drm_crtc *crtc = NULL;
80	int i = 0, ret;
81
82	/* If there is no display topology the host just assumes
83	 * that the guest will set the same layout as the host.
84	 */
85	if (!(dev_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY)) {
86		int w = 0, h = 0;
87		list_for_each_entry(entry, &lds->active, active) {
88			crtc = &entry->base.crtc;
89			w = max(w, crtc->x + crtc->mode.hdisplay);
90			h = max(h, crtc->y + crtc->mode.vdisplay);
91			i++;
92		}
93
94		if (crtc == NULL)
95			return 0;
96		fb = entry->base.crtc.fb;
97
98		return vmw_kms_write_svga(dev_priv, w, h, fb->pitches[0],
99					  fb->bits_per_pixel, fb->depth);
100	}
101
102	if (!list_empty(&lds->active)) {
103		entry = list_entry(lds->active.next, typeof(*entry), active);
104		fb = entry->base.crtc.fb;
105
106		vmw_kms_write_svga(dev_priv, fb->width, fb->height, fb->pitches[0],
107				   fb->bits_per_pixel, fb->depth);
108	}
109
110	/* Make sure we always show something. */
111	vmw_write(dev_priv, SVGA_REG_NUM_GUEST_DISPLAYS,
112		  lds->num_active ? lds->num_active : 1);
113
114	i = 0;
115	list_for_each_entry(entry, &lds->active, active) {
116		crtc = &entry->base.crtc;
117
118		vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, i);
119		vmw_write(dev_priv, SVGA_REG_DISPLAY_IS_PRIMARY, !i);
120		vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_X, crtc->x);
121		vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_Y, crtc->y);
122		vmw_write(dev_priv, SVGA_REG_DISPLAY_WIDTH, crtc->mode.hdisplay);
123		vmw_write(dev_priv, SVGA_REG_DISPLAY_HEIGHT, crtc->mode.vdisplay);
124		vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
125
126		i++;
127	}
128
129	BUG_ON(i != lds->num_active);
130
131	lds->last_num_active = lds->num_active;
132
133
134	/* Find the first du with a cursor. */
135	list_for_each_entry(entry, &lds->active, active) {
136		du = &entry->base;
137
138		if (!du->cursor_dmabuf)
139			continue;
140
141		ret = vmw_cursor_update_dmabuf(dev_priv,
142					       du->cursor_dmabuf,
143					       64, 64,
144					       du->hotspot_x,
145					       du->hotspot_y);
146		if (ret == 0)
147			break;
148
149		DRM_ERROR("Could not update cursor image\n");
150	}
151
152	return 0;
153}
154
155static int vmw_ldu_del_active(struct vmw_private *vmw_priv,
156			      struct vmw_legacy_display_unit *ldu)
157{
158	struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
159	if (list_empty(&ldu->active))
160		return 0;
161
162	/* Must init otherwise list_empty(&ldu->active) will not work. */
163	list_del_init(&ldu->active);
164	if (--(ld->num_active) == 0) {
165		BUG_ON(!ld->fb);
166		if (ld->fb->unpin)
167			ld->fb->unpin(ld->fb);
168		ld->fb = NULL;
169	}
170
171	return 0;
172}
173
174static int vmw_ldu_add_active(struct vmw_private *vmw_priv,
175			      struct vmw_legacy_display_unit *ldu,
176			      struct vmw_framebuffer *vfb)
177{
178	struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
179	struct vmw_legacy_display_unit *entry;
180	struct list_head *at;
181
182	BUG_ON(!ld->num_active && ld->fb);
183	if (vfb != ld->fb) {
184		if (ld->fb && ld->fb->unpin)
185			ld->fb->unpin(ld->fb);
186		if (vfb->pin)
187			vfb->pin(vfb);
188		ld->fb = vfb;
189	}
190
191	if (!list_empty(&ldu->active))
192		return 0;
193
194	at = &ld->active;
195	list_for_each_entry(entry, &ld->active, active) {
196		if (entry->base.unit > ldu->base.unit)
197			break;
198
199		at = &entry->active;
200	}
201
202	list_add(&ldu->active, at);
203
204	ld->num_active++;
205
206	return 0;
207}
208
209static int vmw_ldu_crtc_set_config(struct drm_mode_set *set)
210{
211	struct vmw_private *dev_priv;
212	struct vmw_legacy_display_unit *ldu;
213	struct drm_connector *connector;
214	struct drm_display_mode *mode;
215	struct drm_encoder *encoder;
216	struct vmw_framebuffer *vfb;
217	struct drm_framebuffer *fb;
218	struct drm_crtc *crtc;
219
220	if (!set)
221		return -EINVAL;
222
223	if (!set->crtc)
224		return -EINVAL;
225
226	/* get the ldu */
227	crtc = set->crtc;
228	ldu = vmw_crtc_to_ldu(crtc);
229	vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL;
230	dev_priv = vmw_priv(crtc->dev);
231
232	if (set->num_connectors > 1) {
233		DRM_ERROR("to many connectors\n");
234		return -EINVAL;
235	}
236
237	if (set->num_connectors == 1 &&
238	    set->connectors[0] != &ldu->base.connector) {
239		DRM_ERROR("connector doesn't match %p %p\n",
240			set->connectors[0], &ldu->base.connector);
241		return -EINVAL;
242	}
243
244	/* ldu only supports one fb active at the time */
245	if (dev_priv->ldu_priv->fb && vfb &&
246	    !(dev_priv->ldu_priv->num_active == 1 &&
247	      !list_empty(&ldu->active)) &&
248	    dev_priv->ldu_priv->fb != vfb) {
249		DRM_ERROR("Multiple framebuffers not supported\n");
250		return -EINVAL;
251	}
252
253	/* since they always map one to one these are safe */
254	connector = &ldu->base.connector;
255	encoder = &ldu->base.encoder;
256
257	/* should we turn the crtc off? */
258	if (set->num_connectors == 0 || !set->mode || !set->fb) {
259
260		connector->encoder = NULL;
261		encoder->crtc = NULL;
262		crtc->fb = NULL;
263
264		vmw_ldu_del_active(dev_priv, ldu);
265
266		return vmw_ldu_commit_list(dev_priv);
267	}
268
269
270	/* we now know we want to set a mode */
271	mode = set->mode;
272	fb = set->fb;
273
274	if (set->x + mode->hdisplay > fb->width ||
275	    set->y + mode->vdisplay > fb->height) {
276		DRM_ERROR("set outside of framebuffer\n");
277		return -EINVAL;
278	}
279
280	vmw_fb_off(dev_priv);
281
282	crtc->fb = fb;
283	encoder->crtc = crtc;
284	connector->encoder = encoder;
285	crtc->x = set->x;
286	crtc->y = set->y;
287	crtc->mode = *mode;
288
289	vmw_ldu_add_active(dev_priv, ldu, vfb);
290
291	return vmw_ldu_commit_list(dev_priv);
292}
293
294static struct drm_crtc_funcs vmw_legacy_crtc_funcs = {
295	.save = vmw_du_crtc_save,
296	.restore = vmw_du_crtc_restore,
297	.cursor_set = vmw_du_crtc_cursor_set,
298	.cursor_move = vmw_du_crtc_cursor_move,
299	.gamma_set = vmw_du_crtc_gamma_set,
300	.destroy = vmw_ldu_crtc_destroy,
301	.set_config = vmw_ldu_crtc_set_config,
302};
303
304
305/*
306 * Legacy Display Unit encoder functions
307 */
308
309static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder)
310{
311	vmw_ldu_destroy(vmw_encoder_to_ldu(encoder));
312}
313
314static struct drm_encoder_funcs vmw_legacy_encoder_funcs = {
315	.destroy = vmw_ldu_encoder_destroy,
316};
317
318/*
319 * Legacy Display Unit connector functions
320 */
321
322static void vmw_ldu_connector_destroy(struct drm_connector *connector)
323{
324	vmw_ldu_destroy(vmw_connector_to_ldu(connector));
325}
326
327static struct drm_connector_funcs vmw_legacy_connector_funcs = {
328	.dpms = vmw_du_connector_dpms,
329	.save = vmw_du_connector_save,
330	.restore = vmw_du_connector_restore,
331	.detect = vmw_du_connector_detect,
332	.fill_modes = vmw_du_connector_fill_modes,
333	.set_property = vmw_du_connector_set_property,
334	.destroy = vmw_ldu_connector_destroy,
335};
336
337static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
338{
339	struct vmw_legacy_display_unit *ldu;
340	struct drm_device *dev = dev_priv->dev;
341	struct drm_connector *connector;
342	struct drm_encoder *encoder;
343	struct drm_crtc *crtc;
344
345	ldu = kzalloc(sizeof(*ldu), GFP_KERNEL);
346	if (!ldu)
347		return -ENOMEM;
348
349	ldu->base.unit = unit;
350	crtc = &ldu->base.crtc;
351	encoder = &ldu->base.encoder;
352	connector = &ldu->base.connector;
353
354	INIT_LIST_HEAD(&ldu->active);
355
356	ldu->base.pref_active = (unit == 0);
357	ldu->base.pref_width = dev_priv->initial_width;
358	ldu->base.pref_height = dev_priv->initial_height;
359	ldu->base.pref_mode = NULL;
360	ldu->base.is_implicit = true;
361
362	drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
363			   DRM_MODE_CONNECTOR_VIRTUAL);
364	connector->status = vmw_du_connector_detect(connector, true);
365
366	drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs,
367			 DRM_MODE_ENCODER_VIRTUAL);
368	drm_mode_connector_attach_encoder(connector, encoder);
369	encoder->possible_crtcs = (1 << unit);
370	encoder->possible_clones = 0;
371
372	drm_crtc_init(dev, crtc, &vmw_legacy_crtc_funcs);
373
374	drm_mode_crtc_set_gamma_size(crtc, 256);
375
376	drm_connector_attach_property(connector,
377				      dev->mode_config.dirty_info_property,
378				      1);
379
380	return 0;
381}
382
383int vmw_kms_init_legacy_display_system(struct vmw_private *dev_priv)
384{
385	struct drm_device *dev = dev_priv->dev;
386	int i, ret;
387
388	if (dev_priv->ldu_priv) {
389		DRM_INFO("ldu system already on\n");
390		return -EINVAL;
391	}
392
393	dev_priv->ldu_priv = kmalloc(sizeof(*dev_priv->ldu_priv), GFP_KERNEL);
394	if (!dev_priv->ldu_priv)
395		return -ENOMEM;
396
397	INIT_LIST_HEAD(&dev_priv->ldu_priv->active);
398	dev_priv->ldu_priv->num_active = 0;
399	dev_priv->ldu_priv->last_num_active = 0;
400	dev_priv->ldu_priv->fb = NULL;
401
402	/* for old hardware without multimon only enable one display */
403	if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
404		ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
405	else
406		ret = drm_vblank_init(dev, 1);
407	if (ret != 0)
408		goto err_free;
409
410	ret = drm_mode_create_dirty_info_property(dev);
411	if (ret != 0)
412		goto err_vblank_cleanup;
413
414	if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
415		for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
416			vmw_ldu_init(dev_priv, i);
417	else
418		vmw_ldu_init(dev_priv, 0);
419
420	return 0;
421
422err_vblank_cleanup:
423	drm_vblank_cleanup(dev);
424err_free:
425	kfree(dev_priv->ldu_priv);
426	dev_priv->ldu_priv = NULL;
427	return ret;
428}
429
430int vmw_kms_close_legacy_display_system(struct vmw_private *dev_priv)
431{
432	struct drm_device *dev = dev_priv->dev;
433
434	if (!dev_priv->ldu_priv)
435		return -ENOSYS;
436
437	drm_vblank_cleanup(dev);
438
439	BUG_ON(!list_empty(&dev_priv->ldu_priv->active));
440
441	kfree(dev_priv->ldu_priv);
442
443	return 0;
444}
445