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
39struct 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 */
51struct vmw_legacy_display_unit {
52	struct vmw_display_unit base;
53
54	struct list_head active;
55};
56
57static 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
69static void vmw_ldu_crtc_destroy(struct drm_crtc *crtc)
70{
71	vmw_ldu_destroy(vmw_crtc_to_ldu(crtc));
72}
73
74static 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
156static 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
175static 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
210static 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
297static 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
312static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder)
313{
314	vmw_ldu_destroy(vmw_encoder_to_ldu(encoder));
315}
316
317static 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
325static void vmw_ldu_connector_destroy(struct drm_connector *connector)
326{
327	vmw_ldu_destroy(vmw_connector_to_ldu(connector));
328}
329
330static 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
340static 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
388int 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
427err_vblank_cleanup:
428	drm_vblank_cleanup(dev);
429err_free:
430	kfree(dev_priv->ldu_priv);
431	dev_priv->ldu_priv = NULL;
432	return ret;
433}
434
435int 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