vbox_mode.c@ 85649

Last change on this file since 85649 was 85649, checked in by vboxsync, 5 years ago
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1	/* $Id: vbox_mode.c 85649 2020-08-08 13:35:48Z vboxsync $ */
2	/** @file
3	* VirtualBox Additions Linux kernel video driver
4	*/
5
6	/*
7	* Copyright (C) 2013-2020 Oracle Corporation
8	* This file is based on ast_mode.c
9	* Copyright 2012 Red Hat Inc.
10	* Parts based on xf86-video-ast
11	* Copyright (c) 2005 ASPEED Technology Inc.
12	*
13	* Permission is hereby granted, free of charge, to any person obtaining a
14	* copy of this software and associated documentation files (the
15	* "Software"), to deal in the Software without restriction, including
16	* without limitation the rights to use, copy, modify, merge, publish,
17	* distribute, sub license, and/or sell copies of the Software, and to
18	* permit persons to whom the Software is furnished to do so, subject to
19	* the following conditions:
20	*
21	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
22	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23	* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
24	* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
25	* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
26	* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
27	* USE OR OTHER DEALINGS IN THE SOFTWARE.
28	*
29	* The above copyright notice and this permission notice (including the
30	* next paragraph) shall be included in all copies or substantial portions
31	* of the Software.
32	*
33	*/
34	/*
35	* Authors: Dave Airlie <[email protected]>
36	* Michael Thayer <[email protected],
37	* Hans de Goede <[email protected]>
38	*/
39	#include "vbox_drv.h"
40	#include <linux/export.h>
41	#include <drm/drm_crtc_helper.h>
42	#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 18, 0) \|\| defined(RHEL_72)
43	#include <drm/drm_plane_helper.h>
44	#endif
45	#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 1, 0) \|\| defined(RHEL_81)
46	#include <drm/drm_probe_helper.h>
47	#endif
48
49	#include "VBoxVideo.h"
50
51	static int vbox_cursor_set2(struct drm_crtc crtc, struct drm_file file_priv,
52	u32 handle, u32 width, u32 height,
53	s32 hot_x, s32 hot_y);
54	static int vbox_cursor_move(struct drm_crtc *crtc, int x, int y);
55
56	/**
57	* Set a graphics mode. Poke any required values into registers, do an HGSMI
58	* mode set and tell the host we support advanced graphics functions.
59	*/
60	static void vbox_do_modeset(struct drm_crtc *crtc,
61	const struct drm_display_mode *mode)
62	{
63	struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
64	struct vbox_private *vbox;
65	int width, height, bpp, pitch;
66	u16 flags;
67	s32 x_offset, y_offset;
68
69	vbox = crtc->dev->dev_private;
70	width = mode->hdisplay ? mode->hdisplay : 640;
71	height = mode->vdisplay ? mode->vdisplay : 480;
72	#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0) \|\| defined(RHEL_75)
73	bpp = crtc->enabled ? CRTC_FB(crtc)->format->cpp[0] * 8 : 32;
74	pitch = crtc->enabled ? CRTC_FB(crtc)->pitches[0] : width * bpp / 8;
75	#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3, 3, 0)
76	bpp = crtc->enabled ? CRTC_FB(crtc)->bits_per_pixel : 32;
77	pitch = crtc->enabled ? CRTC_FB(crtc)->pitches[0] : width * bpp / 8;
78	#else
79	bpp = crtc->enabled ? CRTC_FB(crtc)->bits_per_pixel : 32;
80	pitch = crtc->enabled ? CRTC_FB(crtc)->pitch : width * bpp / 8;
81	#endif
82	x_offset = vbox->single_framebuffer ? crtc->x : vbox_crtc->x_hint;
83	y_offset = vbox->single_framebuffer ? crtc->y : vbox_crtc->y_hint;
84
85	/*
86	* This is the old way of setting graphics modes. It assumed one screen
87	* and a frame-buffer at the start of video RAM. On older versions of
88	* VirtualBox, certain parts of the code still assume that the first
89	* screen is programmed this way, so try to fake it.
90	*/
91	if (vbox_crtc->crtc_id == 0 && crtc->enabled &&
92	vbox_crtc->fb_offset / pitch < 0xffff - crtc->y &&
93	vbox_crtc->fb_offset % (bpp / 8) == 0)
94	VBoxVideoSetModeRegisters(
95	width, height, pitch * 8 / bpp,
96	#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0) \|\| defined(RHEL_75)
97	CRTC_FB(crtc)->format->cpp[0] * 8,
98	#else
99	CRTC_FB(crtc)->bits_per_pixel,
100	#endif
101	0,
102	vbox_crtc->fb_offset % pitch / bpp * 8 + crtc->x,
103	vbox_crtc->fb_offset / pitch + crtc->y);
104
105	flags = VBVA_SCREEN_F_ACTIVE;
106	flags \|= (crtc->enabled && !vbox_crtc->blanked) ?
107	0 : VBVA_SCREEN_F_BLANK;
108	flags \|= vbox_crtc->disconnected ? VBVA_SCREEN_F_DISABLED : 0;
109	VBoxHGSMIProcessDisplayInfo(vbox->guest_pool, vbox_crtc->crtc_id,
110	x_offset, y_offset, vbox_crtc->fb_offset +
111	crtc->x * bpp / 8 + crtc->y * pitch,
112	pitch, width, height,
113	vbox_crtc->blanked ? 0 : bpp, flags);
114	}
115
116	static void vbox_crtc_dpms(struct drm_crtc *crtc, int mode)
117	{
118	struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
119	struct vbox_private *vbox = crtc->dev->dev_private;
120
121	switch (mode) {
122	case DRM_MODE_DPMS_ON:
123	vbox_crtc->blanked = false;
124	/* Restart the refresh timer if necessary. */
125	schedule_delayed_work(&vbox->refresh_work, VBOX_REFRESH_PERIOD);
126	break;
127	case DRM_MODE_DPMS_STANDBY:
128	case DRM_MODE_DPMS_SUSPEND:
129	case DRM_MODE_DPMS_OFF:
130	vbox_crtc->blanked = true;
131	break;
132	}
133
134	mutex_lock(&vbox->hw_mutex);
135	vbox_do_modeset(crtc, &crtc->hwmode);
136	mutex_unlock(&vbox->hw_mutex);
137	}
138
139	static bool vbox_crtc_mode_fixup(struct drm_crtc *crtc,
140	const struct drm_display_mode *mode,
141	struct drm_display_mode *adjusted_mode)
142	{
143	return true;
144	}
145
146	/*
147	* Try to map the layout of virtual screens to the range of the input device.
148	* Return true if we need to re-set the crtc modes due to screen offset
149	* changes.
150	*/
151	static bool vbox_set_up_input_mapping(struct vbox_private *vbox)
152	{
153	struct drm_crtc *crtci;
154	struct drm_connector *connectori;
155	struct drm_framebuffer *fb1 = NULL;
156	bool single_framebuffer = true;
157	bool old_single_framebuffer = vbox->single_framebuffer;
158	u16 width = 0, height = 0;
159
160	/*
161	* Are we using an X.Org-style single large frame-buffer for all crtcs?
162	* If so then screen layout can be deduced from the crtc offsets.
163	* Same fall-back if this is the fbdev frame-buffer.
164	*/
165	list_for_each_entry(crtci, &vbox->dev->mode_config.crtc_list, head) {
166	if (!fb1) {
167	fb1 = CRTC_FB(crtci);
168	if (to_vbox_framebuffer(fb1) == &vbox->fbdev->afb)
169	break;
170	} else if (CRTC_FB(crtci) && fb1 != CRTC_FB(crtci)) {
171	single_framebuffer = false;
172	}
173	}
174	if (single_framebuffer) {
175	list_for_each_entry(crtci, &vbox->dev->mode_config.crtc_list,
176	head) {
177	if (to_vbox_crtc(crtci)->crtc_id != 0)
178	continue;
179
180	if (!CRTC_FB(crtci))
181	break;
182	vbox->single_framebuffer = true;
183	vbox->input_mapping_width = CRTC_FB(crtci)->width;
184	vbox->input_mapping_height = CRTC_FB(crtci)->height;
185	return old_single_framebuffer !=
186	vbox->single_framebuffer;
187	}
188	}
189	/* Otherwise calculate the total span of all screens. */
190	list_for_each_entry(connectori, &vbox->dev->mode_config.connector_list,
191	head) {
192	struct vbox_connector *vbox_connector =
193	to_vbox_connector(connectori);
194	struct vbox_crtc *vbox_crtc = vbox_connector->vbox_crtc;
195
196	width = max_t(u16, width, vbox_crtc->x_hint +
197	vbox_connector->mode_hint.width);
198	height = max_t(u16, height, vbox_crtc->y_hint +
199	vbox_connector->mode_hint.height);
200	}
201
202	vbox->single_framebuffer = false;
203	vbox->input_mapping_width = width;
204	vbox->input_mapping_height = height;
205
206	return old_single_framebuffer != vbox->single_framebuffer;
207	}
208
209	static int vbox_crtc_set_base(struct drm_crtc *crtc,
210	struct drm_framebuffer *old_fb,
211	struct drm_framebuffer *new_fb,
212	int x, int y)
213	{
214	struct vbox_private *vbox = crtc->dev->dev_private;
215	struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
216	struct drm_gem_object *obj;
217	struct vbox_framebuffer *vbox_fb;
218	struct vbox_bo *bo;
219	int ret;
220	u64 gpu_addr;
221
222	vbox_fb = to_vbox_framebuffer(new_fb);
223	obj = vbox_fb->obj;
224	bo = gem_to_vbox_bo(obj);
225
226	ret = vbox_bo_reserve(bo, false);
227	if (ret)
228	return ret;
229
230	ret = vbox_bo_pin(bo, TTM_PL_FLAG_VRAM, &gpu_addr);
231	vbox_bo_unreserve(bo);
232	if (ret)
233	return ret;
234
235	/* Unpin the previous fb. Do this after the new one has been pinned rather
236	* than before and re-pinning it on failure in case that fails too. */
237	if (old_fb) {
238	vbox_fb = to_vbox_framebuffer(old_fb);
239	obj = vbox_fb->obj;
240	bo = gem_to_vbox_bo(obj);
241	ret = vbox_bo_reserve(bo, false);
242	/* This should never fail, as no one else should be accessing it and we
243	* should be running under the modeset locks. */
244	if (!ret) {
245	vbox_bo_unpin(bo);
246	vbox_bo_unreserve(bo);
247	}
248	}
249
250	if (&vbox->fbdev->afb == vbox_fb)
251	vbox_fbdev_set_base(vbox, gpu_addr);
252
253	vbox_crtc->fb_offset = gpu_addr;
254	if (vbox_set_up_input_mapping(vbox)) {
255	struct drm_crtc *crtci;
256
257	list_for_each_entry(crtci, &vbox->dev->mode_config.crtc_list,
258	head) {
259	vbox_do_modeset(crtci, &crtci->mode);
260	}
261	}
262
263	return 0;
264	}
265
266	static int vbox_crtc_mode_set(struct drm_crtc *crtc,
267	struct drm_display_mode *mode,
268	struct drm_display_mode *adjusted_mode,
269	int x, int y, struct drm_framebuffer *old_fb)
270	{
271	struct vbox_private *vbox = crtc->dev->dev_private;
272	int ret = vbox_crtc_set_base(crtc, old_fb, CRTC_FB(crtc), x, y);
273	if (ret)
274	return ret;
275	mutex_lock(&vbox->hw_mutex);
276	vbox_do_modeset(crtc, mode);
277	VBoxHGSMIUpdateInputMapping(vbox->guest_pool, 0, 0,
278	vbox->input_mapping_width,
279	vbox->input_mapping_height);
280	mutex_unlock(&vbox->hw_mutex);
281
282	return ret;
283	}
284
285	static int vbox_crtc_page_flip(struct drm_crtc *crtc,
286	struct drm_framebuffer *fb,
287	#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0) \|\| defined(RHEL_75)
288	struct drm_pending_vblank_event *event,
289	uint32_t page_flip_flags,
290	struct drm_modeset_acquire_ctx *ctx)
291	#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3, 12, 0) \|\| defined(RHEL_70)
292	struct drm_pending_vblank_event *event,
293	uint32_t page_flip_flags)
294	#else
295	struct drm_pending_vblank_event *event)
296	#endif
297	{
298	struct vbox_private *vbox = crtc->dev->dev_private;
299	struct drm_device *drm = vbox->dev;
300	unsigned long flags;
301	int rc;
302
303	rc = vbox_crtc_set_base(crtc, CRTC_FB(crtc), fb, 0, 0);
304	if (rc)
305	return rc;
306
307	vbox_do_modeset(crtc, &crtc->mode);
308	mutex_unlock(&vbox->hw_mutex);
309
310	spin_lock_irqsave(&drm->event_lock, flags);
311
312	if (event)
313	#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 19, 0) \|\| defined(RHEL_72)
314	drm_crtc_send_vblank_event(crtc, event);
315	#else
316	drm_send_vblank_event(drm, -1, event);
317	#endif
318
319	spin_unlock_irqrestore(&drm->event_lock, flags);
320
321	return 0;
322	}
323
324	static void vbox_crtc_disable(struct drm_crtc *crtc)
325	{
326	}
327
328	static void vbox_crtc_prepare(struct drm_crtc *crtc)
329	{
330	}
331
332	static void vbox_crtc_commit(struct drm_crtc *crtc)
333	{
334	}
335
336	static const struct drm_crtc_helper_funcs vbox_crtc_helper_funcs = {
337	.dpms = vbox_crtc_dpms,
338	.mode_fixup = vbox_crtc_mode_fixup,
339	.mode_set = vbox_crtc_mode_set,
340	.disable = vbox_crtc_disable,
341	.prepare = vbox_crtc_prepare,
342	.commit = vbox_crtc_commit,
343	};
344
345	static void vbox_crtc_reset(struct drm_crtc *crtc)
346	{
347	}
348
349	static void vbox_crtc_destroy(struct drm_crtc *crtc)
350	{
351	drm_crtc_cleanup(crtc);
352	kfree(crtc);
353	}
354
355	static const struct drm_crtc_funcs vbox_crtc_funcs = {
356	.cursor_move = vbox_cursor_move,
357	.cursor_set2 = vbox_cursor_set2,
358	.reset = vbox_crtc_reset,
359	.set_config = drm_crtc_helper_set_config,
360	/* .gamma_set = vbox_crtc_gamma_set, */
361	.page_flip = vbox_crtc_page_flip,
362	.destroy = vbox_crtc_destroy,
363	};
364
365	static struct vbox_crtc vbox_crtc_init(struct drm_device dev, unsigned int i)
366	{
367	struct vbox_crtc *vbox_crtc;
368
369	vbox_crtc = kzalloc(sizeof(*vbox_crtc), GFP_KERNEL);
370	if (!vbox_crtc)
371	return NULL;
372
373	vbox_crtc->crtc_id = i;
374
375	drm_crtc_init(dev, &vbox_crtc->base, &vbox_crtc_funcs);
376	drm_mode_crtc_set_gamma_size(&vbox_crtc->base, 256);
377	drm_crtc_helper_add(&vbox_crtc->base, &vbox_crtc_helper_funcs);
378
379	return vbox_crtc;
380	}
381
382	static void vbox_encoder_destroy(struct drm_encoder *encoder)
383	{
384	drm_encoder_cleanup(encoder);
385	kfree(encoder);
386	}
387
388	#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0) && !defined(RHEL_71)
389	static struct drm_encoder drm_encoder_find(struct drm_device dev, u32 id)
390	{
391	struct drm_mode_object *mo;
392
393	mo = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_ENCODER);
394	return mo ? obj_to_encoder(mo) : NULL;
395	}
396	#endif
397
398	static struct drm_encoder *vbox_best_single_encoder(struct drm_connector
399	*connector)
400	{
401	#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 5, 0)
402	struct drm_encoder *encoder;
403
404	/* There is only one encoder per connector */
405	drm_connector_for_each_possible_encoder(connector, encoder)
406	return encoder;
407	#else /* KERNEL_VERSION < 5.5 */
408	int enc_id = connector->encoder_ids[0];
409
410	/* pick the encoder ids */
411	if (enc_id)
412	# if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0) \|\| \
413	(defined(CONFIG_SUSE_VERSION) && \
414	LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)) \|\| \
415	defined(RHEL_76)
416	return drm_encoder_find(connector->dev, NULL, enc_id);
417	# else
418	return drm_encoder_find(connector->dev, enc_id);
419	# endif
420	#endif /* KERNEL_VERSION < 5.5 */
421	return NULL;
422	}
423
424	static const struct drm_encoder_funcs vbox_enc_funcs = {
425	.destroy = vbox_encoder_destroy,
426	};
427
428	static void vbox_encoder_dpms(struct drm_encoder *encoder, int mode)
429	{
430	}
431
432	static bool vbox_mode_fixup(struct drm_encoder *encoder,
433	const struct drm_display_mode *mode,
434	struct drm_display_mode *adjusted_mode)
435	{
436	return true;
437	}
438
439	static void vbox_encoder_mode_set(struct drm_encoder *encoder,
440	struct drm_display_mode *mode,
441	struct drm_display_mode *adjusted_mode)
442	{
443	}
444
445	static void vbox_encoder_prepare(struct drm_encoder *encoder)
446	{
447	}
448
449	static void vbox_encoder_commit(struct drm_encoder *encoder)
450	{
451	}
452
453	static const struct drm_encoder_helper_funcs vbox_enc_helper_funcs = {
454	.dpms = vbox_encoder_dpms,
455	.mode_fixup = vbox_mode_fixup,
456	.prepare = vbox_encoder_prepare,
457	.commit = vbox_encoder_commit,
458	.mode_set = vbox_encoder_mode_set,
459	};
460
461	static struct drm_encoder vbox_encoder_init(struct drm_device dev,
462	unsigned int i)
463	{
464	struct vbox_encoder *vbox_encoder;
465
466	vbox_encoder = kzalloc(sizeof(*vbox_encoder), GFP_KERNEL);
467	if (!vbox_encoder)
468	return NULL;
469
470	drm_encoder_init(dev, &vbox_encoder->base, &vbox_enc_funcs,
471	#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 5, 0) \|\| defined(RHEL_73)
472	DRM_MODE_ENCODER_DAC, NULL);
473	#else
474	DRM_MODE_ENCODER_DAC);
475	#endif
476	drm_encoder_helper_add(&vbox_encoder->base, &vbox_enc_helper_funcs);
477
478	vbox_encoder->base.possible_crtcs = 1 << i;
479	return &vbox_encoder->base;
480	}
481
482	/**
483	* Generate EDID data with a mode-unique serial number for the virtual
484	* monitor to try to persuade Unity that different modes correspond to
485	* different monitors and it should not try to force the same resolution on
486	* them.
487	*/
488	static void vbox_set_edid(struct drm_connector *connector, int width,
489	int height)
490	{
491	enum { EDID_SIZE = 128 };
492	unsigned char edid[EDID_SIZE] = {
493	0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, /* header */
494	0x58, 0x58, /* manufacturer (VBX) */
495	0x00, 0x00, /* product code */
496	0x00, 0x00, 0x00, 0x00, /* serial number goes here */
497	0x01, /* week of manufacture */
498	0x00, /* year of manufacture */
499	0x01, 0x03, /* EDID version */
500	0x80, /* capabilities - digital */
501	0x00, /* horiz. res in cm, zero for projectors */
502	0x00, /* vert. res in cm */
503	0x78, /* display gamma (120 == 2.2). */
504	0xEE, /* features (standby, suspend, off, RGB, std */
505	/* colour space, preferred timing mode) */
506	0xEE, 0x91, 0xA3, 0x54, 0x4C, 0x99, 0x26, 0x0F, 0x50, 0x54,
507	/* chromaticity for standard colour space. */
508	0x00, 0x00, 0x00, /* no default timings */
509	0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
510	0x01, 0x01,
511	0x01, 0x01, 0x01, 0x01, /* no standard timings */
512	0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x06, 0x00, 0x02, 0x02,
513	0x02, 0x02,
514	/* descriptor block 1 goes below */
515	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
516	/* descriptor block 2, monitor ranges */
517	0x00, 0x00, 0x00, 0xFD, 0x00,
518	0x00, 0xC8, 0x00, 0xC8, 0x64, 0x00, 0x0A, 0x20, 0x20, 0x20,
519	0x20, 0x20,
520	/* 0-200Hz vertical, 0-200KHz horizontal, 1000MHz pixel clock */
521	0x20,
522	/* descriptor block 3, monitor name */
523	0x00, 0x00, 0x00, 0xFC, 0x00,
524	'V', 'B', 'O', 'X', ' ', 'm', 'o', 'n', 'i', 't', 'o', 'r',
525	'\n',
526	/* descriptor block 4: dummy data */
527	0x00, 0x00, 0x00, 0x10, 0x00,
528	0x0A, 0x20, 0x20, 0x20, 0x20, 0x20,
529	0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
530	0x20,
531	0x00, /* number of extensions */
532	0x00 /* checksum goes here */
533	};
534	int clock = (width + 6) * (height + 6) * 60 / 10000;
535	unsigned int i, sum = 0;
536
537	edid[12] = width & 0xff;
538	edid[13] = width >> 8;
539	edid[14] = height & 0xff;
540	edid[15] = height >> 8;
541	edid[54] = clock & 0xff;
542	edid[55] = clock >> 8;
543	edid[56] = width & 0xff;
544	edid[58] = (width >> 4) & 0xf0;
545	edid[59] = height & 0xff;
546	edid[61] = (height >> 4) & 0xf0;
547	for (i = 0; i < EDID_SIZE - 1; ++i)
548	sum += edid[i];
549	edid[EDID_SIZE - 1] = (0x100 - (sum & 0xFF)) & 0xFF;
550	#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 19, 0) \|\| defined(OPENSUSE_151) \|\| defined(OPENSUSE_125) \
551	\|\| defined(RHEL_77) \|\| defined(RHEL_81)
552	drm_connector_update_edid_property(connector, (struct edid *)edid);
553	#else
554	drm_mode_connector_update_edid_property(connector, (struct edid *)edid);
555	#endif
556	}
557
558	static int vbox_get_modes(struct drm_connector *connector)
559	{
560	struct vbox_connector *vbox_connector = NULL;
561	struct drm_display_mode *mode = NULL;
562	struct vbox_private *vbox = NULL;
563	unsigned int num_modes = 0;
564	int preferred_width, preferred_height;
565
566	vbox_connector = to_vbox_connector(connector);
567	vbox = connector->dev->dev_private;
568	/*
569	* Heuristic: we do not want to tell the host that we support dynamic
570	* resizing unless we feel confident that the user space client using
571	* the video driver can handle hot-plug events. So the first time modes
572	* are queried after a "master" switch we tell the host that we do not,
573	* and immediately after we send the client a hot-plug notification as
574	* a test to see if they will respond and query again.
575	* That is also the reason why capabilities are reported to the host at
576	* this place in the code rather than elsewhere.
577	* We need to report the flags location before reporting the IRQ
578	* capability.
579	*/
580	VBoxHGSMIReportFlagsLocation(vbox->guest_pool, GUEST_HEAP_OFFSET(vbox) +
581	HOST_FLAGS_OFFSET);
582	if (vbox_connector->vbox_crtc->crtc_id == 0)
583	vbox_report_caps(vbox);
584	if (!vbox->initial_mode_queried) {
585	if (vbox_connector->vbox_crtc->crtc_id == 0) {
586	vbox->initial_mode_queried = true;
587	vbox_report_hotplug(vbox);
588	}
589	return drm_add_modes_noedid(connector, 800, 600);
590	}
591	/* Also assume that a client which supports hot-plugging also knows
592	* how to update the screen in a way we can use, the only known
593	* relevent client which cannot is Plymouth in Ubuntu 14.04. */
594	vbox->need_refresh_timer = false;
595	num_modes = drm_add_modes_noedid(connector, 2560, 1600);
596	preferred_width = vbox_connector->mode_hint.width ?
597	vbox_connector->mode_hint.width : 1024;
598	preferred_height = vbox_connector->mode_hint.height ?
599	vbox_connector->mode_hint.height : 768;
600	mode = drm_cvt_mode(connector->dev, preferred_width, preferred_height,
601	60, false, false, false);
602	if (mode) {
603	mode->type \|= DRM_MODE_TYPE_PREFERRED;
604	drm_mode_probed_add(connector, mode);
605	++num_modes;
606	}
607	vbox_set_edid(connector, preferred_width, preferred_height);
608
609	#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 19, 0) \|\| defined(RHEL_72)
610	if (vbox_connector->vbox_crtc->x_hint != -1)
611	drm_object_property_set_value(&connector->base,
612	vbox->dev->mode_config.suggested_x_property,
613	vbox_connector->vbox_crtc->x_hint);
614	else
615	drm_object_property_set_value(&connector->base,
616	vbox->dev->mode_config.suggested_x_property, 0);
617
618	if (vbox_connector->vbox_crtc->y_hint != -1)
619	drm_object_property_set_value(&connector->base,
620	vbox->dev->mode_config.suggested_y_property,
621	vbox_connector->vbox_crtc->y_hint);
622	else
623	drm_object_property_set_value(&connector->base,
624	vbox->dev->mode_config.suggested_y_property, 0);
625	#endif
626
627	return num_modes;
628	}
629
630	#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 0) && !defined(RHEL_71)
631	static int vbox_mode_valid(struct drm_connector *connector,
632	#else
633	static enum drm_mode_status vbox_mode_valid(struct drm_connector *connector,
634	#endif
635	struct drm_display_mode *mode)
636	{
637	return MODE_OK;
638	}
639
640	static void vbox_connector_destroy(struct drm_connector *connector)
641	{
642	#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0) && !defined(RHEL_72)
643	drm_sysfs_connector_remove(connector);
644	#else
645	drm_connector_unregister(connector);
646	#endif
647	drm_connector_cleanup(connector);
648	kfree(connector);
649	}
650
651	static enum drm_connector_status
652	vbox_connector_detect(struct drm_connector *connector, bool force)
653	{
654	struct vbox_connector *vbox_connector;
655
656	vbox_connector = to_vbox_connector(connector);
657
658	return vbox_connector->mode_hint.disconnected ?
659	connector_status_disconnected : connector_status_connected;
660	}
661
662	static int vbox_fill_modes(struct drm_connector *connector, u32 max_x,
663	u32 max_y)
664	{
665	struct vbox_connector *vbox_connector;
666	struct drm_device *dev;
667	struct drm_display_mode mode, iterator;
668
669	vbox_connector = to_vbox_connector(connector);
670	dev = vbox_connector->base.dev;
671	list_for_each_entry_safe(mode, iterator, &connector->modes, head) {
672	list_del(&mode->head);
673	drm_mode_destroy(dev, mode);
674	}
675
676	return drm_helper_probe_single_connector_modes(connector, max_x, max_y);
677	}
678
679	static const struct drm_connector_helper_funcs vbox_connector_helper_funcs = {
680	.mode_valid = vbox_mode_valid,
681	.get_modes = vbox_get_modes,
682	.best_encoder = vbox_best_single_encoder,
683	};
684
685	static const struct drm_connector_funcs vbox_connector_funcs = {
686	.dpms = drm_helper_connector_dpms,
687	.detect = vbox_connector_detect,
688	.fill_modes = vbox_fill_modes,
689	.destroy = vbox_connector_destroy,
690	};
691
692	static int vbox_connector_init(struct drm_device *dev,
693	struct vbox_crtc *vbox_crtc,
694	struct drm_encoder *encoder)
695	{
696	struct vbox_connector *vbox_connector;
697	struct drm_connector *connector;
698
699	vbox_connector = kzalloc(sizeof(*vbox_connector), GFP_KERNEL);
700	if (!vbox_connector)
701	return -ENOMEM;
702
703	connector = &vbox_connector->base;
704	vbox_connector->vbox_crtc = vbox_crtc;
705
706	drm_connector_init(dev, connector, &vbox_connector_funcs,
707	DRM_MODE_CONNECTOR_VGA);
708	drm_connector_helper_add(connector, &vbox_connector_helper_funcs);
709
710	connector->interlace_allowed = 0;
711	connector->doublescan_allowed = 0;
712
713	#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 19, 0) \|\| defined(RHEL_72)
714	drm_mode_create_suggested_offset_properties(dev);
715	drm_object_attach_property(&connector->base,
716	dev->mode_config.suggested_x_property, 0);
717	drm_object_attach_property(&connector->base,
718	dev->mode_config.suggested_y_property, 0);
719	#endif
720	#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0) && !defined(RHEL_72)
721	drm_sysfs_connector_add(connector);
722	#else
723	drm_connector_register(connector);
724	#endif
725
726	#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 19, 0) \|\| defined(OPENSUSE_151) \|\| defined(OPENSUSE_125) \
727	\|\| defined(RHEL_77) \|\| defined(RHEL_81)
728	drm_connector_attach_encoder(connector, encoder);
729	#else
730	drm_mode_connector_attach_encoder(connector, encoder);
731	#endif
732
733	return 0;
734	}
735
736	int vbox_mode_init(struct drm_device *dev)
737	{
738	struct vbox_private *vbox = dev->dev_private;
739	struct drm_encoder *encoder;
740	struct vbox_crtc *vbox_crtc;
741	unsigned int i;
742	int ret;
743
744	/* vbox_cursor_init(dev); */
745	for (i = 0; i < vbox->num_crtcs; ++i) {
746	vbox_crtc = vbox_crtc_init(dev, i);
747	if (!vbox_crtc)
748	return -ENOMEM;
749	encoder = vbox_encoder_init(dev, i);
750	if (!encoder)
751	return -ENOMEM;
752	ret = vbox_connector_init(dev, vbox_crtc, encoder);
753	if (ret)
754	return ret;
755	}
756
757	return 0;
758	}
759
760	void vbox_mode_fini(struct drm_device *dev)
761	{
762	/* vbox_cursor_fini(dev); */
763	}
764
765	/**
766	* Copy the ARGB image and generate the mask, which is needed in case the host
767	* does not support ARGB cursors. The mask is a 1BPP bitmap with the bit set
768	* if the corresponding alpha value in the ARGB image is greater than 0xF0.
769	*/
770	static void copy_cursor_image(u8 src, u8 dst, u32 width, u32 height,
771	size_t mask_size)
772	{
773	size_t line_size = (width + 7) / 8;
774	u32 i, j;
775
776	memcpy(dst + mask_size, src, width * height * 4);
777	for (i = 0; i < height; ++i)
778	for (j = 0; j < width; ++j)
779	if (((u32 )src)[i width + j] > 0xf0000000)
780	dst[i * line_size + j / 8] \|= (0x80 >> (j % 8));
781	}
782
783	static int vbox_cursor_set2(struct drm_crtc crtc, struct drm_file file_priv,
784	u32 handle, u32 width, u32 height,
785	s32 hot_x, s32 hot_y)
786	{
787	struct vbox_private *vbox = crtc->dev->dev_private;
788	struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
789	struct ttm_bo_kmap_obj uobj_map;
790	size_t data_size, mask_size;
791	struct drm_gem_object *obj;
792	u32 flags, caps = 0;
793	struct vbox_bo *bo;
794	bool src_isiomem;
795	u8 *dst = NULL;
796	u8 *src;
797	int ret;
798
799	if (!handle) {
800	bool cursor_enabled = false;
801	struct drm_crtc *crtci;
802
803	/* Hide cursor. */
804	vbox_crtc->cursor_enabled = false;
805	list_for_each_entry(crtci, &vbox->dev->mode_config.crtc_list,
806	head) {
807	if (to_vbox_crtc(crtci)->cursor_enabled)
808	cursor_enabled = true;
809	}
810
811	if (!cursor_enabled)
812	VBoxHGSMIUpdatePointerShape(vbox->guest_pool, 0, 0, 0,
813	0, 0, NULL, 0);
814	return 0;
815	}
816
817	vbox_crtc->cursor_enabled = true;
818
819	if (width > VBOX_MAX_CURSOR_WIDTH \|\| height > VBOX_MAX_CURSOR_HEIGHT \|\|
820	width == 0 \|\| height == 0)
821	return -EINVAL;
822	ret = VBoxQueryConfHGSMI(vbox->guest_pool,
823	VBOX_VBVA_CONF32_CURSOR_CAPABILITIES, &caps);
824	if (ret)
825	return ret == VERR_NO_MEMORY ? -ENOMEM : -EINVAL;
826
827	if (!(caps & VBOX_VBVA_CURSOR_CAPABILITY_HARDWARE)) {
828	/*
829	* -EINVAL means cursor_set2() not supported, -EAGAIN means
830	* retry at once.
831	*/
832	return -EBUSY;
833	}
834
835	#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0) \|\| defined(RHEL_74)
836	obj = drm_gem_object_lookup(file_priv, handle);
837	#else
838	obj = drm_gem_object_lookup(crtc->dev, file_priv, handle);
839	#endif
840	if (!obj) {
841	DRM_ERROR("Cannot find cursor object %x for crtc\n", handle);
842	return -ENOENT;
843	}
844
845	bo = gem_to_vbox_bo(obj);
846	ret = vbox_bo_reserve(bo, false);
847	if (ret)
848	goto out_unref_obj;
849
850	/*
851	* The mask must be calculated based on the alpha
852	* channel, one bit per ARGB word, and must be 32-bit
853	* padded.
854	*/
855	mask_size = ((width + 7) / 8 * height + 3) & ~3;
856	data_size = width * height * 4 + mask_size;
857	vbox->cursor_hot_x = hot_x;
858	vbox->cursor_hot_y = hot_y;
859	vbox->cursor_width = width;
860	vbox->cursor_height = height;
861	vbox->cursor_data_size = data_size;
862	dst = vbox->cursor_data;
863
864	ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &uobj_map);
865	if (ret) {
866	vbox->cursor_data_size = 0;
867	goto out_unreserve_bo;
868	}
869
870	src = ttm_kmap_obj_virtual(&uobj_map, &src_isiomem);
871	if (src_isiomem) {
872	DRM_ERROR("src cursor bo not in main memory\n");
873	ret = -EIO;
874	goto out_unmap_bo;
875	}
876
877	copy_cursor_image(src, dst, width, height, mask_size);
878
879	flags = VBOX_MOUSE_POINTER_VISIBLE \| VBOX_MOUSE_POINTER_SHAPE \|
880	VBOX_MOUSE_POINTER_ALPHA;
881	ret = VBoxHGSMIUpdatePointerShape(vbox->guest_pool, flags,
882	vbox->cursor_hot_x, vbox->cursor_hot_y,
883	width, height, dst, data_size);
884	ret = ret == VINF_SUCCESS ? 0 : ret == VERR_NO_MEMORY ? -ENOMEM :
885	ret == VERR_NOT_SUPPORTED ? -EBUSY : -EINVAL;
886
887	out_unmap_bo:
888	ttm_bo_kunmap(&uobj_map);
889	out_unreserve_bo:
890	vbox_bo_unreserve(bo);
891	out_unref_obj:
892	drm_gem_object_put_unlocked(obj);
893
894	return ret;
895	}
896
897	static int vbox_cursor_move(struct drm_crtc *crtc, int x, int y)
898	{
899	struct vbox_private *vbox = crtc->dev->dev_private;
900	s32 crtc_x =
901	vbox->single_framebuffer ? crtc->x : to_vbox_crtc(crtc)->x_hint;
902	s32 crtc_y =
903	vbox->single_framebuffer ? crtc->y : to_vbox_crtc(crtc)->y_hint;
904	int ret;
905
906	x += vbox->cursor_hot_x;
907	y += vbox->cursor_hot_y;
908	if (x + crtc_x < 0 \|\| y + crtc_y < 0 \|\|
909	x + crtc_x >= vbox->input_mapping_width \|\|
910	y + crtc_y >= vbox->input_mapping_width \|\|
911	vbox->cursor_data_size == 0)
912	return 0;
913	ret = VBoxHGSMICursorPosition(vbox->guest_pool, true, x + crtc_x,
914	y + crtc_y, NULL, NULL);
915	return ret == VINF_SUCCESS ? 0 : ret == VERR_NO_MEMORY ? -ENOMEM : ret ==
916	VERR_NOT_SUPPORTED ? -EBUSY : -EINVAL;
917	}

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source: vbox/trunk/src/VBox/Additions/linux/drm/vbox_mode.c@ 85649

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