// Copyright 2017 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#pragma once

#include <stdint.h>
#include <zircon/compiler.h>

// clang-format off

#define VIRTIO_GPU_F_VIRGL        (1u << 0)

#define VIRTIO_GPU_EVENT_DISPLAY  (1 << 0)
#define VIRTIO_GPU_FLAG_FENCE     (1 << 0)
#define VIRTIO_GPU_MAX_SCANOUTS   16

// clang-format on

__BEGIN_CDECLS

enum virtio_gpu_ctrl_type {
    /* 2d commands */
    VIRTIO_GPU_CMD_GET_DISPLAY_INFO = 0x0100,
    VIRTIO_GPU_CMD_RESOURCE_CREATE_2D,
    VIRTIO_GPU_CMD_RESOURCE_UNREF,
    VIRTIO_GPU_CMD_SET_SCANOUT,
    VIRTIO_GPU_CMD_RESOURCE_FLUSH,
    VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D,
    VIRTIO_GPU_CMD_RESOURCE_ATTACH_BACKING,
    VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING,
    /* cursor commands */
    VIRTIO_GPU_CMD_UPDATE_CURSOR = 0x0300,
    VIRTIO_GPU_CMD_MOVE_CURSOR,
    /* success responses */
    VIRTIO_GPU_RESP_OK_NODATA = 0x1100,
    VIRTIO_GPU_RESP_OK_DISPLAY_INFO,
    /* error responses */
    VIRTIO_GPU_RESP_ERR_UNSPEC = 0x1200,
    VIRTIO_GPU_RESP_ERR_OUT_OF_MEMORY,
    VIRTIO_GPU_RESP_ERR_INVALID_SCANOUT_ID,
    VIRTIO_GPU_RESP_ERR_INVALID_RESOURCE_ID,
    VIRTIO_GPU_RESP_ERR_INVALID_CONTEXT_ID,
    VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER,
};

enum virtio_gpu_formats {
    VIRTIO_GPU_FORMAT_B8G8R8A8_UNORM = 1,
    VIRTIO_GPU_FORMAT_B8G8R8X8_UNORM = 2,
    VIRTIO_GPU_FORMAT_A8R8G8B8_UNORM = 3,
    VIRTIO_GPU_FORMAT_X8R8G8B8_UNORM = 4,
    VIRTIO_GPU_FORMAT_R8G8B8A8_UNORM = 67,
    VIRTIO_GPU_FORMAT_X8B8G8R8_UNORM = 68,
    VIRTIO_GPU_FORMAT_A8B8G8R8_UNORM = 121,
    VIRTIO_GPU_FORMAT_R8G8B8X8_UNORM = 134,
};

typedef struct virtio_gpu_config {
    uint32_t events_read;
    uint32_t events_clear;
    uint32_t num_scanouts;
    uint32_t reserved;
} __PACKED virtio_gpu_config_t;

typedef struct virtio_gpu_ctrl_hdr {
    uint32_t type;
    uint32_t flags;
    uint64_t fence_id;
    uint32_t ctx_id;
    uint32_t padding;
} __PACKED virtio_gpu_ctrl_hdr_t;

typedef struct virtio_gpu_rect {
  uint32_t x;
  uint32_t y;
  uint32_t width;
  uint32_t height;
} virtio_gpu_rect_t;

typedef struct virtio_gpu_display_one {
    virtio_gpu_rect_t r;
    uint32_t enabled;
    uint32_t flags;
} __PACKED virtio_gpu_display_one_t;

typedef struct virtio_gpu_resp_display_info {
    virtio_gpu_ctrl_hdr_t hdr;
    virtio_gpu_display_one_t pmodes[VIRTIO_GPU_MAX_SCANOUTS];
} __PACKED virtio_gpu_resp_display_info_t;

typedef struct virtio_gpu_resource_create_2d {
    virtio_gpu_ctrl_hdr_t hdr;
    uint32_t resource_id;
    uint32_t format;
    uint32_t width;
    uint32_t height;
} __PACKED virtio_gpu_resource_create_2d_t;

typedef struct virtio_gpu_resource_unref {
    virtio_gpu_ctrl_hdr_t hdr;
    uint32_t resource_id;
    uint32_t padding;
} __PACKED virtio_gpu_resource_unref_t;

typedef struct virtio_gpu_set_scanout {
    virtio_gpu_ctrl_hdr_t hdr;
    virtio_gpu_rect_t r;
    uint32_t scanout_id;
    uint32_t resource_id;
} __PACKED virtio_gpu_set_scanout_t;

typedef struct virtio_gpu_resource_flush {
    virtio_gpu_ctrl_hdr_t hdr;
    virtio_gpu_rect_t r;
    uint32_t resource_id;
    uint32_t padding;
} __PACKED virtio_gpu_resource_flush_t;

typedef struct virtio_gpu_transfer_to_host_2d {
    virtio_gpu_ctrl_hdr_t hdr;
    virtio_gpu_rect_t r;
    uint64_t offset;
    uint32_t resource_id;
    uint32_t padding;
} __PACKED virtio_gpu_transfer_to_host_2d_t;

typedef struct virtio_gpu_resource_attach_backing {
    virtio_gpu_ctrl_hdr_t hdr;
    uint32_t resource_id;
    uint32_t nr_entries;
} __PACKED virtio_gpu_resource_attach_backing_t;

typedef struct virtio_gpu_mem_entry {
    uint64_t addr;
    uint32_t length;
    uint32_t padding;
} __PACKED virtio_gpu_mem_entry_t;

typedef struct virtio_gpu_resource_detach_backing {
    virtio_gpu_ctrl_hdr_t hdr;
    uint32_t resource_id;
    uint32_t padding;
} __PACKED virtio_gpu_resource_detach_backing_t;

typedef struct virtio_gpu_cursor_pos {
    uint32_t scanout_id;
    uint32_t x;
    uint32_t y;
    uint32_t padding;
} __PACKED virtio_gpu_cursor_pos_t;

typedef struct virtio_gpu_update_cursor {
    virtio_gpu_ctrl_hdr_t hdr;
    virtio_gpu_cursor_pos_t pos;
    uint32_t resource_id;
    uint32_t hot_x;
    uint32_t hot_y;
    uint32_t padding;
} __PACKED virtio_gpu_update_cursor_t;

__END_CDECLS