// license:BSD-3-Clause // copyright-holders:Carl, Miodrag Milanovic #include "emu.h" #include "dinetwork.h" #include "osdnet.h" #include device_network_interface::device_network_interface(const machine_config &mconfig, device_t &device, u32 bandwidth, u32 mtu) : device_interface(device, "network") , m_poll_timer(nullptr) , m_send_timer(nullptr) , m_recv_timer(nullptr) { // Convert to Mibps to Bps m_bandwidth = bandwidth << (20 - 3); m_mtu = mtu; m_intf = -1; m_loopback_control = false; } device_network_interface::~device_network_interface() { } void device_network_interface::interface_post_start() { m_poll_timer = device().machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(device_network_interface::poll_device), this)); m_send_timer = device().machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(device_network_interface::send_complete), this)); m_recv_timer = device().machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(device_network_interface::recv_complete), this)); device().save_item(NAME(m_loopback_control)); } void device_network_interface::interface_post_load() { if (!m_dev) m_poll_timer->reset(); else if (!m_loopback_control && !m_recv_timer->enabled()) start_net_device(); else stop_net_device(); } int device_network_interface::send(u8 *buf, int len, int fcs) { // TODO: enable this check when other devices implement delayed transmit //if (m_send_timer->enabled()) //throw emu_fatalerror("%s(%s): attempted to transmit while transmit already in progress", device().shortname(), device().tag()); int result = 0; if (m_loopback_control) { // loop data back to receiver result = recv_start_cb(buf, len); if (result) { // schedule receive complete callback m_recv_timer->adjust(attotime::from_ticks(len, m_bandwidth), result); } } else if (m_dev) { // send the data (excluding fcs) result = m_dev->send(buf, len - fcs); if (result) result += fcs; } // schedule transmit complete callback m_send_timer->adjust(attotime::from_ticks(len, m_bandwidth), result); return result; } TIMER_CALLBACK_MEMBER(device_network_interface::poll_device) { m_dev->poll(); } void device_network_interface::start_net_device() { // Set device polling time to transfer time for one MTU m_dev->start(); const attotime interval = attotime::from_hz(m_bandwidth / m_mtu); m_poll_timer->adjust(attotime::zero, 0, interval); } void device_network_interface::stop_net_device() { m_poll_timer->reset(); m_dev->stop(); } TIMER_CALLBACK_MEMBER(device_network_interface::send_complete) { send_complete_cb(param); } void device_network_interface::recv_cb(u8 *buf, int len) { if (m_recv_timer->enabled()) throw emu_fatalerror("%s(%s): attempted to receive while receive already in progress", device().shortname(), device().tag()); int result = 0; // process the received data if (!m_loopback_control) result = recv_start_cb(buf, len); if (result) { // stop receiving more data from the network if (m_dev) stop_net_device(); // schedule receive complete callback m_recv_timer->adjust(attotime::from_ticks(len, m_bandwidth), result); } } TIMER_CALLBACK_MEMBER(device_network_interface::recv_complete) { recv_complete_cb(param); // start receiving data from the network again if (m_dev && !m_loopback_control) start_net_device(); } void device_network_interface::set_promisc(bool promisc) { m_promisc = promisc; if (m_dev) m_dev->set_promisc(promisc); } void device_network_interface::set_mac(const u8 *mac) { std::copy_n(mac, std::size(m_mac), std::begin(m_mac)); if (m_dev) m_dev->set_mac(&m_mac[0]); } void device_network_interface::set_interface(int id) { if (m_dev) stop_net_device(); m_dev.reset(open_netdev(id, *this)); if (m_dev) { if (!m_loopback_control) start_net_device(); } else { device().logerror("Network interface %d not found\n", id); id = -1; } m_intf = id; } void device_network_interface::set_loopback(bool loopback) { if (m_loopback_control == loopback) return; m_loopback_control = loopback; if (m_dev) { if (loopback) stop_net_device(); else if (!m_recv_timer->enabled()) start_net_device(); } }