sdk/banjo/fuchsia.hardware.mailbox/mailbox.fidl

// Copyright 2018 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.
library fuchsia.hardware.mailbox;

using zx;

// Mailboxes
type MailboxType = strict enum : uint8 {
    SCP_SECURE_MAILBOX = 0x0;
    SCP_NS_LOW_PRIORITY_MAILBOX = 0x1;
    SCP_NS_HIGH_PRIORITY_MAILBOX = 0x2;
    AP_SECURE_MAILBOX = 0x3;
    AP_NS_LOW_PRIORITY_MAILBOX = 0x4;
    AP_NS_HIGH_PRIORITY_MAILBOX = 0x5;
    INVALID_MAILBOX = 0x6;
};

type MailboxDataBuf = struct {
    cmd uint32;
    @buffer
    tx vector<uint8>:MAX;
};

type MailboxChannel = struct {
    mailbox MailboxType;
    @buffer
    rx vector<uint8>:MAX;
};

@transport("Banjo")
@banjo_layout("ddk-protocol")
protocol Mailbox {
    SendCommand(struct {
        channel MailboxChannel;
        mdata MailboxDataBuf;
    }) -> (struct {
        s zx.status;
    });
};