vbox_mode.c@ 78314

Last change on this file since 78314 was 78067, checked in by vboxsync, 6 years ago
Additions/linux/vboxvideo: attempt to fix a crash in Linux Mint guests. bugref:4567: Linux kernel module maintanance. ticketref:18443: Kernel Oops in vboxvideo.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 25.6 KB

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1	/* $Id: vbox_mode.c 78067 2019-04-10 06:47:16Z vboxsync $ */
2	/** @file
3	* VirtualBox Additions Linux kernel video driver
4	*/
5
6	/*
7	* Copyright (C) 2013-2019 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)
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 void vbox_crtc_disable(struct drm_crtc *crtc)
286	{
287	}
288
289	static void vbox_crtc_prepare(struct drm_crtc *crtc)
290	{
291	}
292
293	static void vbox_crtc_commit(struct drm_crtc *crtc)
294	{
295	}
296
297	static const struct drm_crtc_helper_funcs vbox_crtc_helper_funcs = {
298	.dpms = vbox_crtc_dpms,
299	.mode_fixup = vbox_crtc_mode_fixup,
300	.mode_set = vbox_crtc_mode_set,
301	.disable = vbox_crtc_disable,
302	.prepare = vbox_crtc_prepare,
303	.commit = vbox_crtc_commit,
304	};
305
306	static void vbox_crtc_reset(struct drm_crtc *crtc)
307	{
308	}
309
310	static void vbox_crtc_destroy(struct drm_crtc *crtc)
311	{
312	drm_crtc_cleanup(crtc);
313	kfree(crtc);
314	}
315
316	static const struct drm_crtc_funcs vbox_crtc_funcs = {
317	.cursor_move = vbox_cursor_move,
318	.cursor_set2 = vbox_cursor_set2,
319	.reset = vbox_crtc_reset,
320	.set_config = drm_crtc_helper_set_config,
321	/* .gamma_set = vbox_crtc_gamma_set, */
322	.destroy = vbox_crtc_destroy,
323	};
324
325	static struct vbox_crtc vbox_crtc_init(struct drm_device dev, unsigned int i)
326	{
327	struct vbox_crtc *vbox_crtc;
328
329	vbox_crtc = kzalloc(sizeof(*vbox_crtc), GFP_KERNEL);
330	if (!vbox_crtc)
331	return NULL;
332
333	vbox_crtc->crtc_id = i;
334
335	drm_crtc_init(dev, &vbox_crtc->base, &vbox_crtc_funcs);
336	drm_mode_crtc_set_gamma_size(&vbox_crtc->base, 256);
337	drm_crtc_helper_add(&vbox_crtc->base, &vbox_crtc_helper_funcs);
338
339	return vbox_crtc;
340	}
341
342	static void vbox_encoder_destroy(struct drm_encoder *encoder)
343	{
344	drm_encoder_cleanup(encoder);
345	kfree(encoder);
346	}
347
348	#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0) && !defined(RHEL_71)
349	static struct drm_encoder drm_encoder_find(struct drm_device dev, u32 id)
350	{
351	struct drm_mode_object *mo;
352
353	mo = drm_mode_object_find(dev, id, DRM_MODE_OBJECT_ENCODER);
354	return mo ? obj_to_encoder(mo) : NULL;
355	}
356	#endif
357
358	static struct drm_encoder *vbox_best_single_encoder(struct drm_connector
359	*connector)
360	{
361	int enc_id = connector->encoder_ids[0];
362
363	/* pick the encoder ids */
364	if (enc_id)
365	#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0) \|\| \
366	(defined(CONFIG_SUSE_VERSION) && \
367	LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)) \|\| \
368	defined(RHEL_76)
369	return drm_encoder_find(connector->dev, NULL, enc_id);
370	#else
371	return drm_encoder_find(connector->dev, enc_id);
372	#endif
373
374	return NULL;
375	}
376
377	static const struct drm_encoder_funcs vbox_enc_funcs = {
378	.destroy = vbox_encoder_destroy,
379	};
380
381	static void vbox_encoder_dpms(struct drm_encoder *encoder, int mode)
382	{
383	}
384
385	static bool vbox_mode_fixup(struct drm_encoder *encoder,
386	const struct drm_display_mode *mode,
387	struct drm_display_mode *adjusted_mode)
388	{
389	return true;
390	}
391
392	static void vbox_encoder_mode_set(struct drm_encoder *encoder,
393	struct drm_display_mode *mode,
394	struct drm_display_mode *adjusted_mode)
395	{
396	}
397
398	static void vbox_encoder_prepare(struct drm_encoder *encoder)
399	{
400	}
401
402	static void vbox_encoder_commit(struct drm_encoder *encoder)
403	{
404	}
405
406	static const struct drm_encoder_helper_funcs vbox_enc_helper_funcs = {
407	.dpms = vbox_encoder_dpms,
408	.mode_fixup = vbox_mode_fixup,
409	.prepare = vbox_encoder_prepare,
410	.commit = vbox_encoder_commit,
411	.mode_set = vbox_encoder_mode_set,
412	};
413
414	static struct drm_encoder vbox_encoder_init(struct drm_device dev,
415	unsigned int i)
416	{
417	struct vbox_encoder *vbox_encoder;
418
419	vbox_encoder = kzalloc(sizeof(*vbox_encoder), GFP_KERNEL);
420	if (!vbox_encoder)
421	return NULL;
422
423	drm_encoder_init(dev, &vbox_encoder->base, &vbox_enc_funcs,
424	#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 5, 0) \|\| defined(RHEL_73)
425	DRM_MODE_ENCODER_DAC, NULL);
426	#else
427	DRM_MODE_ENCODER_DAC);
428	#endif
429	drm_encoder_helper_add(&vbox_encoder->base, &vbox_enc_helper_funcs);
430
431	vbox_encoder->base.possible_crtcs = 1 << i;
432	return &vbox_encoder->base;
433	}
434
435	/**
436	* Generate EDID data with a mode-unique serial number for the virtual
437	* monitor to try to persuade Unity that different modes correspond to
438	* different monitors and it should not try to force the same resolution on
439	* them.
440	*/
441	static void vbox_set_edid(struct drm_connector *connector, int width,
442	int height)
443	{
444	enum { EDID_SIZE = 128 };
445	unsigned char edid[EDID_SIZE] = {
446	0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, /* header */
447	0x58, 0x58, /* manufacturer (VBX) */
448	0x00, 0x00, /* product code */
449	0x00, 0x00, 0x00, 0x00, /* serial number goes here */
450	0x01, /* week of manufacture */
451	0x00, /* year of manufacture */
452	0x01, 0x03, /* EDID version */
453	0x80, /* capabilities - digital */
454	0x00, /* horiz. res in cm, zero for projectors */
455	0x00, /* vert. res in cm */
456	0x78, /* display gamma (120 == 2.2). */
457	0xEE, /* features (standby, suspend, off, RGB, std */
458	/* colour space, preferred timing mode) */
459	0xEE, 0x91, 0xA3, 0x54, 0x4C, 0x99, 0x26, 0x0F, 0x50, 0x54,
460	/* chromaticity for standard colour space. */
461	0x00, 0x00, 0x00, /* no default timings */
462	0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
463	0x01, 0x01,
464	0x01, 0x01, 0x01, 0x01, /* no standard timings */
465	0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x06, 0x00, 0x02, 0x02,
466	0x02, 0x02,
467	/* descriptor block 1 goes below */
468	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
469	/* descriptor block 2, monitor ranges */
470	0x00, 0x00, 0x00, 0xFD, 0x00,
471	0x00, 0xC8, 0x00, 0xC8, 0x64, 0x00, 0x0A, 0x20, 0x20, 0x20,
472	0x20, 0x20,
473	/* 0-200Hz vertical, 0-200KHz horizontal, 1000MHz pixel clock */
474	0x20,
475	/* descriptor block 3, monitor name */
476	0x00, 0x00, 0x00, 0xFC, 0x00,
477	'V', 'B', 'O', 'X', ' ', 'm', 'o', 'n', 'i', 't', 'o', 'r',
478	'\n',
479	/* descriptor block 4: dummy data */
480	0x00, 0x00, 0x00, 0x10, 0x00,
481	0x0A, 0x20, 0x20, 0x20, 0x20, 0x20,
482	0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
483	0x20,
484	0x00, /* number of extensions */
485	0x00 /* checksum goes here */
486	};
487	int clock = (width + 6) * (height + 6) * 60 / 10000;
488	unsigned int i, sum = 0;
489
490	edid[12] = width & 0xff;
491	edid[13] = width >> 8;
492	edid[14] = height & 0xff;
493	edid[15] = height >> 8;
494	edid[54] = clock & 0xff;
495	edid[55] = clock >> 8;
496	edid[56] = width & 0xff;
497	edid[58] = (width >> 4) & 0xf0;
498	edid[59] = height & 0xff;
499	edid[61] = (height >> 4) & 0xf0;
500	for (i = 0; i < EDID_SIZE - 1; ++i)
501	sum += edid[i];
502	edid[EDID_SIZE - 1] = (0x100 - (sum & 0xFF)) & 0xFF;
503	#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 19, 0)
504	drm_connector_update_edid_property(connector, (struct edid *)edid);
505	#else
506	drm_mode_connector_update_edid_property(connector, (struct edid *)edid);
507	#endif
508	}
509
510	static int vbox_get_modes(struct drm_connector *connector)
511	{
512	struct vbox_connector *vbox_connector = NULL;
513	struct drm_display_mode *mode = NULL;
514	struct vbox_private *vbox = NULL;
515	unsigned int num_modes = 0;
516	int preferred_width, preferred_height;
517
518	vbox_connector = to_vbox_connector(connector);
519	vbox = connector->dev->dev_private;
520	/*
521	* Heuristic: we do not want to tell the host that we support dynamic
522	* resizing unless we feel confident that the user space client using
523	* the video driver can handle hot-plug events. So the first time modes
524	* are queried after a "master" switch we tell the host that we do not,
525	* and immediately after we send the client a hot-plug notification as
526	* a test to see if they will respond and query again.
527	* That is also the reason why capabilities are reported to the host at
528	* this place in the code rather than elsewhere.
529	* We need to report the flags location before reporting the IRQ
530	* capability.
531	*/
532	VBoxHGSMIReportFlagsLocation(vbox->guest_pool, GUEST_HEAP_OFFSET(vbox) +
533	HOST_FLAGS_OFFSET);
534	if (vbox_connector->vbox_crtc->crtc_id == 0)
535	vbox_report_caps(vbox);
536	if (!vbox->initial_mode_queried) {
537	if (vbox_connector->vbox_crtc->crtc_id == 0) {
538	vbox->initial_mode_queried = true;
539	vbox_report_hotplug(vbox);
540	}
541	return drm_add_modes_noedid(connector, 800, 600);
542	}
543	/* Also assume that a client which supports hot-plugging also knows
544	* how to update the screen in a way we can use, the only known
545	* relevent client which cannot is Plymouth in Ubuntu 14.04. */
546	vbox->need_refresh_timer = false;
547	num_modes = drm_add_modes_noedid(connector, 2560, 1600);
548	preferred_width = vbox_connector->mode_hint.width ?
549	vbox_connector->mode_hint.width : 1024;
550	preferred_height = vbox_connector->mode_hint.height ?
551	vbox_connector->mode_hint.height : 768;
552	mode = drm_cvt_mode(connector->dev, preferred_width, preferred_height,
553	60, false, false, false);
554	if (mode) {
555	mode->type \|= DRM_MODE_TYPE_PREFERRED;
556	drm_mode_probed_add(connector, mode);
557	++num_modes;
558	}
559	vbox_set_edid(connector, preferred_width, preferred_height);
560
561	#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 19, 0) \|\| defined(RHEL_72)
562	if (vbox_connector->vbox_crtc->x_hint != -1)
563	drm_object_property_set_value(&connector->base,
564	vbox->dev->mode_config.suggested_x_property,
565	vbox_connector->vbox_crtc->x_hint);
566	else
567	drm_object_property_set_value(&connector->base,
568	vbox->dev->mode_config.suggested_x_property, 0);
569
570	if (vbox_connector->vbox_crtc->y_hint != -1)
571	drm_object_property_set_value(&connector->base,
572	vbox->dev->mode_config.suggested_y_property,
573	vbox_connector->vbox_crtc->y_hint);
574	else
575	drm_object_property_set_value(&connector->base,
576	vbox->dev->mode_config.suggested_y_property, 0);
577	#endif
578
579	return num_modes;
580	}
581
582	#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 14, 0) && !defined(RHEL_71)
583	static int vbox_mode_valid(struct drm_connector *connector,
584	#else
585	static enum drm_mode_status vbox_mode_valid(struct drm_connector *connector,
586	#endif
587	struct drm_display_mode *mode)
588	{
589	return MODE_OK;
590	}
591
592	static void vbox_connector_destroy(struct drm_connector *connector)
593	{
594	#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0) && !defined(RHEL_72)
595	drm_sysfs_connector_remove(connector);
596	#else
597	drm_connector_unregister(connector);
598	#endif
599	drm_connector_cleanup(connector);
600	kfree(connector);
601	}
602
603	static enum drm_connector_status
604	vbox_connector_detect(struct drm_connector *connector, bool force)
605	{
606	struct vbox_connector *vbox_connector;
607
608	vbox_connector = to_vbox_connector(connector);
609
610	return vbox_connector->mode_hint.disconnected ?
611	connector_status_disconnected : connector_status_connected;
612	}
613
614	static int vbox_fill_modes(struct drm_connector *connector, u32 max_x,
615	u32 max_y)
616	{
617	struct vbox_connector *vbox_connector;
618	struct drm_device *dev;
619	struct drm_display_mode mode, iterator;
620
621	vbox_connector = to_vbox_connector(connector);
622	dev = vbox_connector->base.dev;
623	list_for_each_entry_safe(mode, iterator, &connector->modes, head) {
624	list_del(&mode->head);
625	drm_mode_destroy(dev, mode);
626	}
627
628	return drm_helper_probe_single_connector_modes(connector, max_x, max_y);
629	}
630
631	static const struct drm_connector_helper_funcs vbox_connector_helper_funcs = {
632	.mode_valid = vbox_mode_valid,
633	.get_modes = vbox_get_modes,
634	.best_encoder = vbox_best_single_encoder,
635	};
636
637	static const struct drm_connector_funcs vbox_connector_funcs = {
638	.dpms = drm_helper_connector_dpms,
639	.detect = vbox_connector_detect,
640	.fill_modes = vbox_fill_modes,
641	.destroy = vbox_connector_destroy,
642	};
643
644	static int vbox_connector_init(struct drm_device *dev,
645	struct vbox_crtc *vbox_crtc,
646	struct drm_encoder *encoder)
647	{
648	struct vbox_connector *vbox_connector;
649	struct drm_connector *connector;
650
651	vbox_connector = kzalloc(sizeof(*vbox_connector), GFP_KERNEL);
652	if (!vbox_connector)
653	return -ENOMEM;
654
655	connector = &vbox_connector->base;
656	vbox_connector->vbox_crtc = vbox_crtc;
657
658	drm_connector_init(dev, connector, &vbox_connector_funcs,
659	DRM_MODE_CONNECTOR_VGA);
660	drm_connector_helper_add(connector, &vbox_connector_helper_funcs);
661
662	connector->interlace_allowed = 0;
663	connector->doublescan_allowed = 0;
664
665	#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 19, 0) \|\| defined(RHEL_72)
666	drm_mode_create_suggested_offset_properties(dev);
667	drm_object_attach_property(&connector->base,
668	dev->mode_config.suggested_x_property, 0);
669	drm_object_attach_property(&connector->base,
670	dev->mode_config.suggested_y_property, 0);
671	#endif
672	#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0) && !defined(RHEL_72)
673	drm_sysfs_connector_add(connector);
674	#else
675	drm_connector_register(connector);
676	#endif
677
678	#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 19, 0)
679	drm_connector_attach_encoder(connector, encoder);
680	#else
681	drm_mode_connector_attach_encoder(connector, encoder);
682	#endif
683
684	return 0;
685	}
686
687	int vbox_mode_init(struct drm_device *dev)
688	{
689	struct vbox_private *vbox = dev->dev_private;
690	struct drm_encoder *encoder;
691	struct vbox_crtc *vbox_crtc;
692	unsigned int i;
693	int ret;
694
695	/* vbox_cursor_init(dev); */
696	for (i = 0; i < vbox->num_crtcs; ++i) {
697	vbox_crtc = vbox_crtc_init(dev, i);
698	if (!vbox_crtc)
699	return -ENOMEM;
700	encoder = vbox_encoder_init(dev, i);
701	if (!encoder)
702	return -ENOMEM;
703	ret = vbox_connector_init(dev, vbox_crtc, encoder);
704	if (ret)
705	return ret;
706	}
707
708	return 0;
709	}
710
711	void vbox_mode_fini(struct drm_device *dev)
712	{
713	/* vbox_cursor_fini(dev); */
714	}
715
716	/**
717	* Copy the ARGB image and generate the mask, which is needed in case the host
718	* does not support ARGB cursors. The mask is a 1BPP bitmap with the bit set
719	* if the corresponding alpha value in the ARGB image is greater than 0xF0.
720	*/
721	static void copy_cursor_image(u8 src, u8 dst, u32 width, u32 height,
722	size_t mask_size)
723	{
724	size_t line_size = (width + 7) / 8;
725	u32 i, j;
726
727	memcpy(dst + mask_size, src, width * height * 4);
728	for (i = 0; i < height; ++i)
729	for (j = 0; j < width; ++j)
730	if (((u32 )src)[i width + j] > 0xf0000000)
731	dst[i * line_size + j / 8] \|= (0x80 >> (j % 8));
732	}
733
734	static int vbox_cursor_set2(struct drm_crtc crtc, struct drm_file file_priv,
735	u32 handle, u32 width, u32 height,
736	s32 hot_x, s32 hot_y)
737	{
738	struct vbox_private *vbox = crtc->dev->dev_private;
739	struct vbox_crtc *vbox_crtc = to_vbox_crtc(crtc);
740	struct ttm_bo_kmap_obj uobj_map;
741	size_t data_size, mask_size;
742	struct drm_gem_object *obj;
743	u32 flags, caps = 0;
744	struct vbox_bo *bo;
745	bool src_isiomem;
746	u8 *dst = NULL;
747	u8 *src;
748	int ret;
749
750	if (!handle) {
751	bool cursor_enabled = false;
752	struct drm_crtc *crtci;
753
754	/* Hide cursor. */
755	vbox_crtc->cursor_enabled = false;
756	list_for_each_entry(crtci, &vbox->dev->mode_config.crtc_list,
757	head) {
758	if (to_vbox_crtc(crtci)->cursor_enabled)
759	cursor_enabled = true;
760	}
761
762	if (!cursor_enabled)
763	VBoxHGSMIUpdatePointerShape(vbox->guest_pool, 0, 0, 0,
764	0, 0, NULL, 0);
765	return 0;
766	}
767
768	vbox_crtc->cursor_enabled = true;
769
770	if (width > VBOX_MAX_CURSOR_WIDTH \|\| height > VBOX_MAX_CURSOR_HEIGHT \|\|
771	width == 0 \|\| height == 0)
772	return -EINVAL;
773	ret = VBoxQueryConfHGSMI(vbox->guest_pool,
774	VBOX_VBVA_CONF32_CURSOR_CAPABILITIES, &caps);
775	if (ret)
776	return ret == VERR_NO_MEMORY ? -ENOMEM : -EINVAL;
777
778	if (!(caps & VBOX_VBVA_CURSOR_CAPABILITY_HARDWARE)) {
779	/*
780	* -EINVAL means cursor_set2() not supported, -EAGAIN means
781	* retry at once.
782	*/
783	return -EBUSY;
784	}
785
786	#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0) \|\| defined(RHEL_74)
787	obj = drm_gem_object_lookup(file_priv, handle);
788	#else
789	obj = drm_gem_object_lookup(crtc->dev, file_priv, handle);
790	#endif
791	if (!obj) {
792	DRM_ERROR("Cannot find cursor object %x for crtc\n", handle);
793	return -ENOENT;
794	}
795
796	bo = gem_to_vbox_bo(obj);
797	ret = vbox_bo_reserve(bo, false);
798	if (ret)
799	goto out_unref_obj;
800
801	/*
802	* The mask must be calculated based on the alpha
803	* channel, one bit per ARGB word, and must be 32-bit
804	* padded.
805	*/
806	mask_size = ((width + 7) / 8 * height + 3) & ~3;
807	data_size = width * height * 4 + mask_size;
808	vbox->cursor_hot_x = hot_x;
809	vbox->cursor_hot_y = hot_y;
810	vbox->cursor_width = width;
811	vbox->cursor_height = height;
812	vbox->cursor_data_size = data_size;
813	dst = vbox->cursor_data;
814
815	ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &uobj_map);
816	if (ret) {
817	vbox->cursor_data_size = 0;
818	goto out_unreserve_bo;
819	}
820
821	src = ttm_kmap_obj_virtual(&uobj_map, &src_isiomem);
822	if (src_isiomem) {
823	DRM_ERROR("src cursor bo not in main memory\n");
824	ret = -EIO;
825	goto out_unmap_bo;
826	}
827
828	copy_cursor_image(src, dst, width, height, mask_size);
829
830	flags = VBOX_MOUSE_POINTER_VISIBLE \| VBOX_MOUSE_POINTER_SHAPE \|
831	VBOX_MOUSE_POINTER_ALPHA;
832	ret = VBoxHGSMIUpdatePointerShape(vbox->guest_pool, flags,
833	vbox->cursor_hot_x, vbox->cursor_hot_y,
834	width, height, dst, data_size);
835	ret = ret == VINF_SUCCESS ? 0 : ret == VERR_NO_MEMORY ? -ENOMEM :
836	ret == VERR_NOT_SUPPORTED ? -EBUSY : -EINVAL;
837
838	out_unmap_bo:
839	ttm_bo_kunmap(&uobj_map);
840	out_unreserve_bo:
841	vbox_bo_unreserve(bo);
842	out_unref_obj:
843	drm_gem_object_put_unlocked(obj);
844
845	return ret;
846	}
847
848	static int vbox_cursor_move(struct drm_crtc *crtc, int x, int y)
849	{
850	struct vbox_private *vbox = crtc->dev->dev_private;
851	s32 crtc_x =
852	vbox->single_framebuffer ? crtc->x : to_vbox_crtc(crtc)->x_hint;
853	s32 crtc_y =
854	vbox->single_framebuffer ? crtc->y : to_vbox_crtc(crtc)->y_hint;
855	int ret;
856
857	x += vbox->cursor_hot_x;
858	y += vbox->cursor_hot_y;
859	if (x + crtc_x < 0 \|\| y + crtc_y < 0 \|\|
860	x + crtc_x >= vbox->input_mapping_width \|\|
861	y + crtc_y >= vbox->input_mapping_width \|\|
862	vbox->cursor_data_size == 0)
863	return 0;
864	ret = VBoxHGSMICursorPosition(vbox->guest_pool, true, x + crtc_x,
865	y + crtc_y, NULL, NULL);
866	return ret == VINF_SUCCESS ? 0 : ret == VERR_NO_MEMORY ? -ENOMEM : ret ==
867	VERR_NOT_SUPPORTED ? -EBUSY : -EINVAL;
868	}

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source: vbox/trunk/src/VBox/Additions/linux/drm/vbox_mode.c@ 78314

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