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/*
* Copyright (c) 2021, Kyle Pereira <hey@xylepereira.me>
* Copyright (c) 2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <Kernel/Bus/VirtIO/ConsolePort.h>
#include <Kernel/Bus/VirtIO/Device.h>
#include <Kernel/Memory/RingBuffer.h>
namespace Kernel::VirtIO {
class Console
: public VirtIO::Device
, public RefCounted<Console> {
friend VirtIO::ConsolePort;
public:
static NonnullRefPtr<Console> must_create(PCI::Address address);
virtual ~Console() override = default;
virtual StringView purpose() const override { return class_name(); }
unsigned device_id() const
{
return m_device_id;
}
virtual void initialize() override;
private:
virtual StringView class_name() const override { return "VirtIOConsole"; }
explicit Console(PCI::Address);
enum class ControlEvent : u16 {
DeviceReady = 0,
DeviceAdd = 1,
PortReady = 3,
ConsolePort = 4,
PortOpen = 6,
};
struct [[gnu::packed]] ControlMessage {
u32 id;
u16 event;
u16 value;
enum class Status : u16 {
Success = 1,
Failure = 0
};
enum class PortStatus : u16 {
Open = 1,
Close = 0
};
};
constexpr static u16 CONTROL_RECEIVEQ = 2;
constexpr static u16 CONTROL_TRANSMITQ = 3;
constexpr static size_t CONTROL_MESSAGE_SIZE = sizeof(ControlMessage);
constexpr static size_t CONTROL_BUFFER_SIZE = CONTROL_MESSAGE_SIZE * 32;
virtual bool handle_device_config_change() override;
virtual void handle_queue_update(u16 queue_index) override;
Vector<RefPtr<ConsolePort>> m_ports;
void setup_multiport();
void process_control_message(ControlMessage message);
void write_control_message(ControlMessage message);
void send_open_control_message(unsigned port_number, bool open);
unsigned m_device_id;
OwnPtr<Memory::RingBuffer> m_control_transmit_buffer;
OwnPtr<Memory::RingBuffer> m_control_receive_buffer;
WaitQueue m_control_wait_queue;
static unsigned next_device_id;
};
}
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