1 /* $NetBSD: modesetting.c,v 1.2 2021/12/18 23:45:44 riastradh Exp $ */
2
3 // SPDX-License-Identifier: MIT
4 /* Copyright (C) 2006-2017 Oracle Corporation */
5
6 #include <sys/cdefs.h>
7 __KERNEL_RCSID(0, "$NetBSD: modesetting.c,v 1.2 2021/12/18 23:45:44 riastradh Exp $");
8
9 #include <linux/vbox_err.h>
10 #include "vbox_drv.h"
11 #include "vboxvideo_guest.h"
12 #include "vboxvideo_vbe.h"
13 #include "hgsmi_channels.h"
14
15 /**
16 * Set a video mode via an HGSMI request. The views must have been
17 * initialised first using @a VBoxHGSMISendViewInfo and if the mode is being
18 * set on the first display then it must be set first using registers.
19 * @ctx: The context containing the heap to use.
20 * @display: The screen number.
21 * @origin_x: The horizontal displacement relative to the first scrn.
22 * @origin_y: The vertical displacement relative to the first screen.
23 * @start_offset: The offset of the visible area of the framebuffer
24 * relative to the framebuffer start.
25 * @pitch: The offset in bytes between the starts of two adjecent
26 * scan lines in video RAM.
27 * @width: The mode width.
28 * @height: The mode height.
29 * @bpp: The colour depth of the mode.
30 * @flags: Flags.
31 */
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)32 void hgsmi_process_display_info(struct gen_pool *ctx, u32 display,
33 s32 origin_x, s32 origin_y, u32 start_offset,
34 u32 pitch, u32 width, u32 height,
35 u16 bpp, u16 flags)
36 {
37 struct vbva_infoscreen *p;
38
39 p = hgsmi_buffer_alloc(ctx, sizeof(*p), HGSMI_CH_VBVA,
40 VBVA_INFO_SCREEN);
41 if (!p)
42 return;
43
44 p->view_index = display;
45 p->origin_x = origin_x;
46 p->origin_y = origin_y;
47 p->start_offset = start_offset;
48 p->line_size = pitch;
49 p->width = width;
50 p->height = height;
51 p->bits_per_pixel = bpp;
52 p->flags = flags;
53
54 hgsmi_buffer_submit(ctx, p);
55 hgsmi_buffer_free(ctx, p);
56 }
57
58 /**
59 * Report the rectangle relative to which absolute pointer events should be
60 * expressed. This information remains valid until the next VBVA resize event
61 * for any screen, at which time it is reset to the bounding rectangle of all
62 * virtual screens.
63 * Return: 0 or negative errno value.
64 * @ctx: The context containing the heap to use.
65 * @origin_x: Upper left X co-ordinate relative to the first screen.
66 * @origin_y: Upper left Y co-ordinate relative to the first screen.
67 * @width: Rectangle width.
68 * @height: Rectangle height.
69 */
hgsmi_update_input_mapping(struct gen_pool * ctx,s32 origin_x,s32 origin_y,u32 width,u32 height)70 int hgsmi_update_input_mapping(struct gen_pool *ctx, s32 origin_x, s32 origin_y,
71 u32 width, u32 height)
72 {
73 struct vbva_report_input_mapping *p;
74
75 p = hgsmi_buffer_alloc(ctx, sizeof(*p), HGSMI_CH_VBVA,
76 VBVA_REPORT_INPUT_MAPPING);
77 if (!p)
78 return -ENOMEM;
79
80 p->x = origin_x;
81 p->y = origin_y;
82 p->cx = width;
83 p->cy = height;
84
85 hgsmi_buffer_submit(ctx, p);
86 hgsmi_buffer_free(ctx, p);
87
88 return 0;
89 }
90
91 /**
92 * Get most recent video mode hints.
93 * Return: 0 or negative errno value.
94 * @ctx: The context containing the heap to use.
95 * @screens: The number of screens to query hints for, starting at 0.
96 * @hints: Array of vbva_modehint structures for receiving the hints.
97 */
hgsmi_get_mode_hints(struct gen_pool * ctx,unsigned int screens,struct vbva_modehint * hints)98 int hgsmi_get_mode_hints(struct gen_pool *ctx, unsigned int screens,
99 struct vbva_modehint *hints)
100 {
101 struct vbva_query_mode_hints *p;
102 size_t size;
103
104 if (WARN_ON(!hints))
105 return -EINVAL;
106
107 size = screens * sizeof(struct vbva_modehint);
108 p = hgsmi_buffer_alloc(ctx, sizeof(*p) + size, HGSMI_CH_VBVA,
109 VBVA_QUERY_MODE_HINTS);
110 if (!p)
111 return -ENOMEM;
112
113 p->hints_queried_count = screens;
114 p->hint_structure_guest_size = sizeof(struct vbva_modehint);
115 p->rc = VERR_NOT_SUPPORTED;
116
117 hgsmi_buffer_submit(ctx, p);
118
119 if (p->rc < 0) {
120 hgsmi_buffer_free(ctx, p);
121 return -EIO;
122 }
123
124 memcpy(hints, ((u8 *)p) + sizeof(struct vbva_query_mode_hints), size);
125 hgsmi_buffer_free(ctx, p);
126
127 return 0;
128 }
129