aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/staging/vboxvideo/modesetting.c
blob: be46bb70e919029b856e3864233358f45cbdbd1c (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
/*
 * Copyright (C) 2006-2017 Oracle Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#include <linux/vbox_err.h>
#include "vbox_drv.h"
#include "vboxvideo_guest.h"
#include "vboxvideo_vbe.h"
#include "hgsmi_channels.h"

/**
 * Set a video mode via an HGSMI request.  The views must have been
 * initialised first using @a VBoxHGSMISendViewInfo and if the mode is being
 * set on the first display then it must be set first using registers.
 * @ctx:           The context containing the heap to use.
 * @display:       The screen number.
 * @origin_x:      The horizontal displacement relative to the first scrn.
 * @origin_y:      The vertical displacement relative to the first screen.
 * @start_offset:  The offset of the visible area of the framebuffer
 *                 relative to the framebuffer start.
 * @pitch:         The offset in bytes between the starts of two adjecent
 *                 scan lines in video RAM.
 * @width:         The mode width.
 * @height:        The mode height.
 * @bpp:           The colour depth of the mode.
 * @flags:         Flags.
 */
void hgsmi_process_display_info(struct gen_pool *ctx, u32 display,
				s32 origin_x, s32 origin_y, u32 start_offset,
				u32 pitch, u32 width, u32 height,
				u16 bpp, u16 flags)
{
	struct vbva_infoscreen *p;

	p = hgsmi_buffer_alloc(ctx, sizeof(*p), HGSMI_CH_VBVA,
			       VBVA_INFO_SCREEN);
	if (!p)
		return;

	p->view_index = display;
	p->origin_x = origin_x;
	p->origin_y = origin_y;
	p->start_offset = start_offset;
	p->line_size = pitch;
	p->width = width;
	p->height = height;
	p->bits_per_pixel = bpp;
	p->flags = flags;

	hgsmi_buffer_submit(ctx, p);
	hgsmi_buffer_free(ctx, p);
}

/**
 * Report the rectangle relative to which absolute pointer events should be
 * expressed.  This information remains valid until the next VBVA resize event
 * for any screen, at which time it is reset to the bounding rectangle of all
 * virtual screens.
 * Return: 0 or negative errno value.
 * @ctx:       The context containing the heap to use.
 * @origin_x:  Upper left X co-ordinate relative to the first screen.
 * @origin_y:  Upper left Y co-ordinate relative to the first screen.
 * @width:     Rectangle width.
 * @height:    Rectangle height.
 */
int hgsmi_update_input_mapping(struct gen_pool *ctx, s32 origin_x, s32 origin_y,
			       u32 width, u32 height)
{
	struct vbva_report_input_mapping *p;

	p = hgsmi_buffer_alloc(ctx, sizeof(*p), HGSMI_CH_VBVA,
			       VBVA_REPORT_INPUT_MAPPING);
	if (!p)
		return -ENOMEM;

	p->x = origin_x;
	p->y = origin_y;
	p->cx = width;
	p->cy = height;

	hgsmi_buffer_submit(ctx, p);
	hgsmi_buffer_free(ctx, p);

	return 0;
}

/**
 * Get most recent video mode hints.
 * Return: 0 or negative errno value.
 * @ctx:      The context containing the heap to use.
 * @screens:  The number of screens to query hints for, starting at 0.
 * @hints:    Array of vbva_modehint structures for receiving the hints.
 */
int hgsmi_get_mode_hints(struct gen_pool *ctx, unsigned int screens,
			 struct vbva_modehint *hints)
{
	struct vbva_query_mode_hints *p;
	size_t size;

	if (WARN_ON(!hints))
		return -EINVAL;

	size = screens * sizeof(struct vbva_modehint);
	p = hgsmi_buffer_alloc(ctx, sizeof(*p) + size, HGSMI_CH_VBVA,
			       VBVA_QUERY_MODE_HINTS);
	if (!p)
		return -ENOMEM;

	p->hints_queried_count = screens;
	p->hint_structure_guest_size = sizeof(struct vbva_modehint);
	p->rc = VERR_NOT_SUPPORTED;

	hgsmi_buffer_submit(ctx, p);

	if (p->rc < 0) {
		hgsmi_buffer_free(ctx, p);
		return -EIO;
	}

	memcpy(hints, ((u8 *)p) + sizeof(struct vbva_query_mode_hints), size);
	hgsmi_buffer_free(ctx, p);

	return 0;
}