1 | // SPDX-License-Identifier: MIT |
2 | /* Copyright (C) 2006-2017 Oracle Corporation */ |
3 | |
4 | #include <linux/vbox_err.h> |
5 | #include "vbox_drv.h" |
6 | #include "vboxvideo_guest.h" |
7 | #include "vboxvideo_vbe.h" |
8 | #include "hgsmi_channels.h" |
9 | |
10 | /** |
11 | * hgsmi_process_display_info - Set a video mode via an HGSMI request. |
12 | * The views must have been initialised first |
13 | * using @a VBoxHGSMISendViewInfo and if the mode |
14 | * is being set on the first display then it must |
15 | * be set first using registers. |
16 | * @ctx: The context containing the heap to use. |
17 | * @display: The screen number. |
18 | * @origin_x: The horizontal displacement relative to the first scrn. |
19 | * @origin_y: The vertical displacement relative to the first screen. |
20 | * @start_offset: The offset of the visible area of the framebuffer |
21 | * relative to the framebuffer start. |
22 | * @pitch: The offset in bytes between the starts of two adjecent |
23 | * scan lines in video RAM. |
24 | * @width: The mode width. |
25 | * @height: The mode height. |
26 | * @bpp: The colour depth of the mode. |
27 | * @flags: Flags. |
28 | */ |
29 | void hgsmi_process_display_info(struct gen_pool *ctx, u32 display, |
30 | s32 origin_x, s32 origin_y, u32 start_offset, |
31 | u32 pitch, u32 width, u32 height, |
32 | u16 bpp, u16 flags) |
33 | { |
34 | struct vbva_infoscreen *p; |
35 | |
36 | p = hgsmi_buffer_alloc(guest_pool: ctx, size: sizeof(*p), HGSMI_CH_VBVA, |
37 | VBVA_INFO_SCREEN); |
38 | if (!p) |
39 | return; |
40 | |
41 | p->view_index = display; |
42 | p->origin_x = origin_x; |
43 | p->origin_y = origin_y; |
44 | p->start_offset = start_offset; |
45 | p->line_size = pitch; |
46 | p->width = width; |
47 | p->height = height; |
48 | p->bits_per_pixel = bpp; |
49 | p->flags = flags; |
50 | |
51 | hgsmi_buffer_submit(guest_pool: ctx, buf: p); |
52 | hgsmi_buffer_free(guest_pool: ctx, buf: p); |
53 | } |
54 | |
55 | /** |
56 | * hgsmi_update_input_mapping - Report the rectangle relative to which absolute |
57 | * pointer events should be expressed. This |
58 | * information remains valid until the next VBVA |
59 | * resize event for any screen, at which time it is |
60 | * reset to the bounding rectangle of all virtual |
61 | * screens. |
62 | * Return: 0 or negative errno value. |
63 | * @ctx: The context containing the heap to use. |
64 | * @origin_x: Upper left X co-ordinate relative to the first screen. |
65 | * @origin_y: Upper left Y co-ordinate relative to the first screen. |
66 | * @width: Rectangle width. |
67 | * @height: Rectangle height. |
68 | */ |
69 | int hgsmi_update_input_mapping(struct gen_pool *ctx, s32 origin_x, s32 origin_y, |
70 | u32 width, u32 height) |
71 | { |
72 | struct vbva_report_input_mapping *p; |
73 | |
74 | p = hgsmi_buffer_alloc(guest_pool: ctx, size: sizeof(*p), HGSMI_CH_VBVA, |
75 | VBVA_REPORT_INPUT_MAPPING); |
76 | if (!p) |
77 | return -ENOMEM; |
78 | |
79 | p->x = origin_x; |
80 | p->y = origin_y; |
81 | p->cx = width; |
82 | p->cy = height; |
83 | |
84 | hgsmi_buffer_submit(guest_pool: ctx, buf: p); |
85 | hgsmi_buffer_free(guest_pool: ctx, buf: p); |
86 | |
87 | return 0; |
88 | } |
89 | |
90 | /** |
91 | * hgsmi_get_mode_hints - Get most recent video mode hints. |
92 | * Return: 0 or negative errno value. |
93 | * @ctx: The context containing the heap to use. |
94 | * @screens: The number of screens to query hints for, starting at 0. |
95 | * @hints: Array of vbva_modehint structures for receiving the hints. |
96 | */ |
97 | int hgsmi_get_mode_hints(struct gen_pool *ctx, unsigned int screens, |
98 | struct vbva_modehint *hints) |
99 | { |
100 | struct vbva_query_mode_hints *p; |
101 | size_t size; |
102 | |
103 | if (WARN_ON(!hints)) |
104 | return -EINVAL; |
105 | |
106 | size = screens * sizeof(struct vbva_modehint); |
107 | p = hgsmi_buffer_alloc(guest_pool: ctx, size: sizeof(*p) + size, HGSMI_CH_VBVA, |
108 | VBVA_QUERY_MODE_HINTS); |
109 | if (!p) |
110 | return -ENOMEM; |
111 | |
112 | p->hints_queried_count = screens; |
113 | p->hint_structure_guest_size = sizeof(struct vbva_modehint); |
114 | p->rc = VERR_NOT_SUPPORTED; |
115 | |
116 | hgsmi_buffer_submit(guest_pool: ctx, buf: p); |
117 | |
118 | if (p->rc < 0) { |
119 | hgsmi_buffer_free(guest_pool: ctx, buf: p); |
120 | return -EIO; |
121 | } |
122 | |
123 | memcpy(hints, ((u8 *)p) + sizeof(struct vbva_query_mode_hints), size); |
124 | hgsmi_buffer_free(guest_pool: ctx, buf: p); |
125 | |
126 | return 0; |
127 | } |
128 | |