// SPDX-License-Identifier: MIT
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/* Copyright (C) 2006-2017 Oracle Corporation */
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#include <linux/vbox_err.h>
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#include "vbox_drv.h"
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#include "vboxvideo_guest.h"
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#include "vboxvideo_vbe.h"
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#include "hgsmi_channels.h"
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/**
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* Set a video mode via an HGSMI request. The views must have been
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* initialised first using @a VBoxHGSMISendViewInfo and if the mode is being
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* set on the first display then it must be set first using registers.
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* @ctx: The context containing the heap to use.
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* @display: The screen number.
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* @origin_x: The horizontal displacement relative to the first scrn.
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* @origin_y: The vertical displacement relative to the first screen.
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* @start_offset: The offset of the visible area of the framebuffer
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* relative to the framebuffer start.
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* @pitch: The offset in bytes between the starts of two adjecent
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* scan lines in video RAM.
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* @width: The mode width.
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* @height: The mode height.
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* @bpp: The colour depth of the mode.
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* @flags: Flags.
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*/
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void hgsmi_process_display_info(struct gen_pool *ctx, u32 display,
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s32 origin_x, s32 origin_y, u32 start_offset,
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u32 pitch, u32 width, u32 height,
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u16 bpp, u16 flags)
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{
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struct vbva_infoscreen *p;
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p = hgsmi_buffer_alloc(ctx, sizeof(*p), HGSMI_CH_VBVA,
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VBVA_INFO_SCREEN);
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if (!p)
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return;
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p->view_index = display;
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p->origin_x = origin_x;
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p->origin_y = origin_y;
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p->start_offset = start_offset;
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p->line_size = pitch;
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p->width = width;
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p->height = height;
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p->bits_per_pixel = bpp;
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p->flags = flags;
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hgsmi_buffer_submit(ctx, p);
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hgsmi_buffer_free(ctx, p);
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}
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/**
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* Report the rectangle relative to which absolute pointer events should be
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* expressed. This information remains valid until the next VBVA resize event
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* for any screen, at which time it is reset to the bounding rectangle of all
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* virtual screens.
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* Return: 0 or negative errno value.
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* @ctx: The context containing the heap to use.
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* @origin_x: Upper left X co-ordinate relative to the first screen.
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* @origin_y: Upper left Y co-ordinate relative to the first screen.
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* @width: Rectangle width.
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* @height: Rectangle height.
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*/
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int hgsmi_update_input_mapping(struct gen_pool *ctx, s32 origin_x, s32 origin_y,
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u32 width, u32 height)
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{
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struct vbva_report_input_mapping *p;
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p = hgsmi_buffer_alloc(ctx, sizeof(*p), HGSMI_CH_VBVA,
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VBVA_REPORT_INPUT_MAPPING);
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if (!p)
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return -ENOMEM;
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p->x = origin_x;
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p->y = origin_y;
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p->cx = width;
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p->cy = height;
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hgsmi_buffer_submit(ctx, p);
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hgsmi_buffer_free(ctx, p);
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return 0;
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}
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/**
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* Get most recent video mode hints.
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* Return: 0 or negative errno value.
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* @ctx: The context containing the heap to use.
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* @screens: The number of screens to query hints for, starting at 0.
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* @hints: Array of vbva_modehint structures for receiving the hints.
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*/
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int hgsmi_get_mode_hints(struct gen_pool *ctx, unsigned int screens,
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struct vbva_modehint *hints)
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{
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struct vbva_query_mode_hints *p;
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size_t size;
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if (WARN_ON(!hints))
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return -EINVAL;
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size = screens * sizeof(struct vbva_modehint);
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p = hgsmi_buffer_alloc(ctx, sizeof(*p) + size, HGSMI_CH_VBVA,
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VBVA_QUERY_MODE_HINTS);
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if (!p)
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return -ENOMEM;
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p->hints_queried_count = screens;
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p->hint_structure_guest_size = sizeof(struct vbva_modehint);
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p->rc = VERR_NOT_SUPPORTED;
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hgsmi_buffer_submit(ctx, p);
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if (p->rc < 0) {
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hgsmi_buffer_free(ctx, p);
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return -EIO;
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}
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memcpy(hints, ((u8 *)p) + sizeof(struct vbva_query_mode_hints), size);
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hgsmi_buffer_free(ctx, p);
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return 0;
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}
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