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 */
 29void 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(ctx, 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(ctx, p);
 52	hgsmi_buffer_free(ctx, 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 */
 69int 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(ctx, 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(ctx, p);
 85	hgsmi_buffer_free(ctx, 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 */
 97int 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(ctx, 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(ctx, p);
117
118	if (p->rc < 0) {
119		hgsmi_buffer_free(ctx, p);
120		return -EIO;
121	}
122
123	memcpy(hints, ((u8 *)p) + sizeof(struct vbva_query_mode_hints), size);
124	hgsmi_buffer_free(ctx, p);
125
126	return 0;
127}