xref: /kernel/linux/linux-6.6/drivers/gpu/drm/vboxvideo/vboxvideo_guest.h

/* SPDX-License-Identifier: MIT */
/* Copyright (C) 2006-2016 Oracle Corporation */

#ifndef __VBOXVIDEO_GUEST_H__
#define __VBOXVIDEO_GUEST_H__

#include <linux/genalloc.h>
#include "vboxvideo.h"

/*
 * Structure grouping the context needed for sending graphics acceleration
 * information to the host via VBVA.  Each screen has its own VBVA buffer.
 */
struct vbva_buf_ctx {
	/* Offset of the buffer in the VRAM section for the screen */
	u32 buffer_offset;
	/* Length of the buffer in bytes */
	u32 buffer_length;
	/* Set if we wrote to the buffer faster than the host could read it */
	bool buffer_overflow;
	/* VBVA record that we are currently preparing for the host, or NULL */
	struct vbva_record *record;
	/*
	 * Pointer to the VBVA buffer mapped into the current address space.
	 * Will be NULL if VBVA is not enabled.
	 */
	struct vbva_buffer *vbva;
};

int hgsmi_report_flags_location(struct gen_pool *ctx, u32 location);
int hgsmi_send_caps_info(struct gen_pool *ctx, u32 caps);
int hgsmi_test_query_conf(struct gen_pool *ctx);
int hgsmi_query_conf(struct gen_pool *ctx, u32 index, u32 *value_ret);
int hgsmi_update_pointer_shape(struct gen_pool *ctx, u32 flags,
			       u32 hot_x, u32 hot_y, u32 width, u32 height,
			       u8 *pixels, u32 len);
int hgsmi_cursor_position(struct gen_pool *ctx, bool report_position,
			  u32 x, u32 y, u32 *x_host, u32 *y_host);

bool vbva_enable(struct vbva_buf_ctx *vbva_ctx, struct gen_pool *ctx,
		 struct vbva_buffer *vbva, s32 screen);
void vbva_disable(struct vbva_buf_ctx *vbva_ctx, struct gen_pool *ctx,
		  s32 screen);
bool vbva_buffer_begin_update(struct vbva_buf_ctx *vbva_ctx,
			      struct gen_pool *ctx);
void vbva_buffer_end_update(struct vbva_buf_ctx *vbva_ctx);
bool vbva_write(struct vbva_buf_ctx *vbva_ctx, struct gen_pool *ctx,
		const void *p, u32 len);
void vbva_setup_buffer_context(struct vbva_buf_ctx *vbva_ctx,
			       u32 buffer_offset, u32 buffer_length);

void 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);
int hgsmi_update_input_mapping(struct gen_pool *ctx, s32 origin_x, s32 origin_y,
			       u32 width, u32 height);
int hgsmi_get_mode_hints(struct gen_pool *ctx, unsigned int screens,
			 struct vbva_modehint *hints);

#endif