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      1 /*	$NetBSD: vboxvideo_guest.h,v 1.2 2021/12/18 23:45:44 riastradh Exp $	*/
      2 
      3 /* SPDX-License-Identifier: MIT */
      4 /* Copyright (C) 2006-2016 Oracle Corporation */
      5 
      6 #ifndef __VBOXVIDEO_GUEST_H__
      7 #define __VBOXVIDEO_GUEST_H__
      8 
      9 #include <linux/genalloc.h>
     10 #include "vboxvideo.h"
     11 
     12 /*
     13  * Structure grouping the context needed for sending graphics acceleration
     14  * information to the host via VBVA.  Each screen has its own VBVA buffer.
     15  */
     16 struct vbva_buf_ctx {
     17 	/* Offset of the buffer in the VRAM section for the screen */
     18 	u32 buffer_offset;
     19 	/* Length of the buffer in bytes */
     20 	u32 buffer_length;
     21 	/* Set if we wrote to the buffer faster than the host could read it */
     22 	bool buffer_overflow;
     23 	/* VBVA record that we are currently preparing for the host, or NULL */
     24 	struct vbva_record *record;
     25 	/*
     26 	 * Pointer to the VBVA buffer mapped into the current address space.
     27 	 * Will be NULL if VBVA is not enabled.
     28 	 */
     29 	struct vbva_buffer *vbva;
     30 };
     31 
     32 int hgsmi_report_flags_location(struct gen_pool *ctx, u32 location);
     33 int hgsmi_send_caps_info(struct gen_pool *ctx, u32 caps);
     34 int hgsmi_test_query_conf(struct gen_pool *ctx);
     35 int hgsmi_query_conf(struct gen_pool *ctx, u32 index, u32 *value_ret);
     36 int hgsmi_update_pointer_shape(struct gen_pool *ctx, u32 flags,
     37 			       u32 hot_x, u32 hot_y, u32 width, u32 height,
     38 			       u8 *pixels, u32 len);
     39 int hgsmi_cursor_position(struct gen_pool *ctx, bool report_position,
     40 			  u32 x, u32 y, u32 *x_host, u32 *y_host);
     41 
     42 bool vbva_enable(struct vbva_buf_ctx *vbva_ctx, struct gen_pool *ctx,
     43 		 struct vbva_buffer *vbva, s32 screen);
     44 void vbva_disable(struct vbva_buf_ctx *vbva_ctx, struct gen_pool *ctx,
     45 		  s32 screen);
     46 bool vbva_buffer_begin_update(struct vbva_buf_ctx *vbva_ctx,
     47 			      struct gen_pool *ctx);
     48 void vbva_buffer_end_update(struct vbva_buf_ctx *vbva_ctx);
     49 bool vbva_write(struct vbva_buf_ctx *vbva_ctx, struct gen_pool *ctx,
     50 		const void *p, u32 len);
     51 void vbva_setup_buffer_context(struct vbva_buf_ctx *vbva_ctx,
     52 			       u32 buffer_offset, u32 buffer_length);
     53 
     54 void hgsmi_process_display_info(struct gen_pool *ctx, u32 display,
     55 				s32 origin_x, s32 origin_y, u32 start_offset,
     56 				u32 pitch, u32 width, u32 height,
     57 				u16 bpp, u16 flags);
     58 int hgsmi_update_input_mapping(struct gen_pool *ctx, s32 origin_x, s32 origin_y,
     59 			       u32 width, u32 height);
     60 int hgsmi_get_mode_hints(struct gen_pool *ctx, unsigned int screens,
     61 			 struct vbva_modehint *hints);
     62 
     63 #endif
     64