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